CN114208375B - PDCCH detection method and device - Google Patents

PDCCH detection method and device Download PDF

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Publication number
CN114208375B
CN114208375B CN201980099208.4A CN201980099208A CN114208375B CN 114208375 B CN114208375 B CN 114208375B CN 201980099208 A CN201980099208 A CN 201980099208A CN 114208375 B CN114208375 B CN 114208375B
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pdcch candidate
pdcch
value
cces
cfi
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CN114208375A (en
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杨洪建
邵家枫
官磊
余政
夏金环
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Huawei Technologies Co Ltd
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Huawei Technologies Co Ltd
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    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L1/00—Arrangements for detecting or preventing errors in the information received
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W72/00—Local resource management
    • H04W72/04—Wireless resource allocation
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W74/00—Wireless channel access
    • H04W74/04—Scheduled access

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  • Engineering & Computer Science (AREA)
  • Computer Networks & Wireless Communication (AREA)
  • Signal Processing (AREA)
  • Mobile Radio Communication Systems (AREA)

Abstract

The embodiment of the application relates to a Physical Downlink Control Channel (PDCCH) configuration method and device, which are used for improving the success rate of PDCCH detection, wherein the PDCCH configuration method comprises the following steps: the method comprises the steps that a first user terminal (UE) accesses a broadcast special carrier; the first UE detects at least one first PDCCH candidate in a PDCCH candidate set on the broadcast dedicated carrier, where the first PDCCH candidate is composed of n×l control channel elements CCEs, where starting positions of code bit collection of a front (N/2) L CCE and a rear (N/2) L CCE in the n×l CCEs are the same, L is an integer greater than or equal to 8, and N is an even number greater than 0.

Description

PDCCH detection method and device
Cross Reference to Related Applications
The present application claims priority from PCT patent application filed on date 08, 2019, international patent office, application number PCT/CN2019/101208, entitled "a PDCCH configuration method and apparatus", the entire contents of which are incorporated herein by reference.
Technical Field
The present disclosure relates to the field of wireless communications technologies, and in particular, to a method and an apparatus for detecting a PDCCH.
Background
A physical downlink control channel (Physical Downlink Control Channel, PDCCH) may be transmitted in a downlink subframe for transmitting downlink control information (Downlink Control Information, DCI), and the region for PDCCH transmission is referred to as a control region, which occupies the first N orthogonal frequency division multiplexing (Orthogonal Frequency Division Multiplexing, OFDM) symbols of one downlink subframe. The transmission of the PDCCH channels is organized in CCE format, and in general, the PDCCH may be transmitted on M logically consecutive control channel elements (Control Channel Element, CCEs), referred to as aggregation levels (Aggregation Level, AL), where there is a correspondence between the aggregation levels and the number M of CCEs.
And the terminal performs PDCCH blind detection and searches whether PDCCH sent by the terminal exists. The terminal detects PCFICH to obtain control format indication (Control Format Indicator, CFI) information, determines the number of symbols occupied by PDCCH in time domain, determines a control area for transmitting PDCCH according to the determined number of symbols occupied by PDCCH in time domain, and determines the number of M in the control area according to the search space and the aggregation level of PDCCH, thereby performing PDCCH blind detection in M CCEs, specifically searching whether PDCCH sent by the terminal exists in a public search space or a user exclusive search space, and if PDCCH is detected, detecting DCI and other information.
The conventional common terminal has a CCE aggregation level of 8, the terminal can only perform blind detection on the PDCCH with the aggregation level not exceeding 8, and if the aggregation level of the PDCCH transmitted by the base station exceeds 8, such as 16 or 24, for the conventional terminal with maximum support only CCE aggregation level 8, the terminal cannot perform blind detection on the PDCCH transmitted by the base station, and thus cannot detect information such as DCI.
Disclosure of Invention
The embodiment of the application provides a method and a device for detecting PDCCH, so that when the aggregation level of PDCCH sent by network equipment is larger than the aggregation level supported by first UE, the first UE can realize the detection of PDCCH through the combination of CCEs, thereby improving the success rate of PDCCH detection.
In a first aspect, a method for detecting a PDCCH is provided, including the following steps: the network equipment sends a signal for the UE to access to a user terminal (UE) on a broadcast special carrier; the method comprises the steps that a first user terminal (UE) accesses a broadcast special carrier; the first UE detects at least one first PDCCH candidate in a PDCCH candidate set on the broadcast dedicated carrier, where the first PDCCH candidate is composed of n×l control channel elements CCEs, where starting positions of code bit collection of a front (N/2) L CCE and a rear (N/2) L CCE in the n×l CCEs are the same, L is an integer greater than or equal to 8, and N is an even number greater than 0.
Optionally, for the first UE, the signal sent by the network device for the first UE to access may be further used to indicate the first capability of the first UE, and/or to indicate the first UE to detect at least one first PDCCH candidate.
The first UE refers to a high-release UE, i.e., a UE supporting 16 and above release protocols, also referred to as a new UE. For example, the aggregate capability of the first UE is 4 or 8, 16 or higher, etc.
Illustratively, the first capability includes at least one of:
the first UE supports detection of a first PDCCH candidate consisting of 16 CCEs, namely the aggregation capability of the first UE is 16;
The first UE supports version 16 protocols;
the first UE supports the 16 version broadcast or multicast feature.
For example, how the network device transmits PDCCH candidates on the broadcast dedicated carrier, where the first PDCCH candidate may be regarded as being composed of two second PDCCH candidates, and when the first PDCCH is plural, the procedure of transmitting PDCCH candidates by the network device is similar, and will not be described herein.
In one implementation, the network device sends two second PDCCH candidates to the UE on a broadcast dedicated carrier.
The UE includes a first UE and a second UE.
For the first UE, if the first UE determines to detect the first PDCCH candidate, after the first UE receives the two second PDCCH candidates, the first UE composes the two second PDCCH candidates into one first PDCCH candidate, and the first UE detects the one first PDCCH candidate.
For the first UE, if the first UE determines that the first PDCCH candidate is not detected, the first UE receives two second PDCCH candidates and then detects the two second PDCCH candidates respectively.
For the second UE, after receiving the two second PDCCH candidates, the second UE detects the two second PDCCH candidates respectively.
Among the n×l CCEs, the starting positions of the code bit collection of the front (N/2) L CCEs and the rear (N/2) L CCEs are the same, and for example, the CCE indexes (such as CCE logical codes) may be ordered from small to large, where the first CCE to the (N/2) L CCEs are the front (N/2) L CCEs, and the (N/2) l+1 CCEs to the last CCEs are the rear (N/2) L CCEs. Or, CCE indexes 0 to CCE index (N/2) L-1 are the first (N/2) L CCEs, and CCE indexes (N/2) L to the last CCE are the last (N/2) L CCEs.
The initial positions of the code bit collection of the first (N/2) x L CCEs and the last (N/2) x L CCEs constituting the first PDCCH candidate are the same, which means that the first bit in the sequence after the code bit collection corresponding to the first CCE in the first (N/2) x L CCEs, the bit in the sequence before the corresponding code bit collection or the bit index in the sequence before the corresponding code bit collection is the same as the first bit in the sequence after the code bit collection corresponding to the first CCE in the last (N/2) x L CCEs, and the bit in the sequence before the corresponding code bit collection or the bit index in the sequence before the corresponding code bit collection is the same.
The first UE accesses a broadcast special carrier, detects at least one first PDCCH candidate in a PDCCH candidate set on the broadcast special carrier, wherein the first PDCCH candidate is composed of N.L CCEs, and among the N.L CCEs, the starting positions of the code bit collection of the front (N/2) L CCEs and the rear (N/2) L CCEs are the same, and the first UE can detect the first PDCCH candidate composed of the N.L CCEs, so that the first UE can detect the PDCCH through combining the CCEs when the aggregation level of the PDCCH transmitted by the network equipment is greater than or equal to that of the first UE, and the success rate of PDCCH detection is improved.
In one possible implementation, the first PDCCH candidate consists of n×l consecutive CCEs starting with a first starting CCE, which is CCE index 0.
In one possible implementation, the first (N/2) x L CCEs and the second (N/2) x L CCEs constitute two second PDCCH candidates, respectively.
In one possible implementation, the first (N/2) L CCEs constitute a second PDCCH candidate and the later (N/2) L CCEs constitute a third PDCCH candidate, wherein the third PDCCH candidate is different from scrambling and/or interleaving of the second PDCCH candidate; or alternatively
The first (N/2) L CCEs constitute a third PDCCH candidate and the later (N/2) L CCEs constitute a second PDCCH candidate, wherein the third PDCCH candidate is different from scrambling and/or interleaving of the second PDCCH candidate.
In this implementation, since the two second PDCCHs are independent of each other and the starting positions of the CCE code bit collections are the same, the two second PDCCHs can be independently decoded by the second UE.
The second UE refers to a low-release UE, i.e. a UE that does not support 16 and above release protocols, i.e. a UE that supports only 16 release protocols, also referred to as old UE.
In one possible implementation, the first PDCCH candidate is in a common search space.
The first PDCCH candidate may also be said to belong to a common search space. That is, the first UE listens for the first PDCCH candidate in the common search space.
In one possible implementation, the detecting at least one first PDCCH candidate in the PDCCH candidate set includes:
if the first UE receives an indication of detecting the first PDCCH candidates sent by the network equipment, the first UE detects at least one first PDCCH candidate in the PDCCH candidate set; or alternatively
And if the first UE supports the detection of the first PDCCH candidates, the first UE detects at least one first PDCCH candidate in the PDCCH candidate set.
The network device may send an indication to the first UE to detect the first PDCCH candidate, and the first UE may receive the indication to detect the first PDCCH candidate sent by the network device.
In one implementation, the indication of the detection of the first PDCCH candidate is indicated by an MBMS primary information block carried by the PBCH.
For example, the MBMS master information block includes one of a master information block (master information block, MIB), MIB-MBMS, SIB1, SI.
In a second aspect, a method for detecting a PDCCH is provided, including the following steps: the network equipment sends a signal for the UE to access to a user terminal (UE) on a broadcast special carrier; the network device sends at least one first PDCCH candidate in a PDCCH candidate set to the UE on the broadcast dedicated carrier, wherein the first PDCCH candidate is composed of N.L Control Channel Elements (CCEs), the starting positions of the code bit collection of the front (N/2) L CCEs and the rear (N/2) L CCEs are the same, L is an integer greater than or equal to 8, and N is an even number greater than 0; the UE detects the at least one first PDCCH candidate.
In one possible implementation, the PDCCH candidate consists of n×l consecutive CCEs starting with a first starting CCE, which is CCE index 0.
In one possible implementation, the first (N/2) x L CCEs and the second (N/2) x L CCEs constitute two second PDCCH candidates, respectively.
In one possible implementation, the first (N/2) L CCEs constitute a second PDCCH candidate and the later (N/2) L CCEs constitute a third PDCCH candidate, wherein the third PDCCH candidate is different from scrambling and/or interleaving of the second PDCCH candidate; or alternatively
The first (N/2) L CCEs constitute a third PDCCH candidate and the later (N/2) L CCEs constitute a second PDCCH candidate, wherein the third PDCCH candidate is different from scrambling and/or interleaving of the second PDCCH candidate.
In one possible implementation, the first PDCCH candidate is in a common search space.
In one possible implementation, the network device sends an indication to the first UE to detect a first PDCCH candidate.
In one possible implementation, the indication of detecting the first PDCCH candidate is at least one information in an MBMS primary information block carried by a physical broadcast channel PBCH.
The network device is indicated by at least one information in the MBMS master information block, for example.
In yet another example, the network device indicates, in the MBMS master information block, a bit status value through at least one information indication, and has a correspondence with an aggregation level used by the PDCCH in advance with the first UE.
In a third aspect, a method for configuring a control format indicator CFI is provided, including the following procedures: the user equipment UE determines a CFI, where the CFI is used to indicate the number of symbols occupied by PDCCH transmission in one subframe, and the CFI is determined by at least one of the following ways:
the UE determines the CFI according to the received third information;
the UE determines the CFI according to a predefined;
the UE determines the CFI according to the first corresponding relation and fourth information;
wherein the third information and/or the fourth information is information carried in a physical broadcast channel PBCH;
and the UE detects downlink control information PDCCH according to the CFI.
By statically configuring the CFI in the method, the UE does not need to determine the CFI or detect the PCFICH, and the UE can determine the value of the CFI in a connection state or an idle state, so that the success rate of PDCCH blind detection is improved.
In one possible implementation, the third information and/or fourth information is carried in an MBMS master information block.
In one possible implementation, the third information indicates the value of the CFI by 1 bit, including one of the following cases:
1,2 and 3; or alternatively
2,3 and 4; or alternatively
1,2 and 4; or alternatively
1,3 and 4; or alternatively
1,2,3 and 4.
In one possible implementation, the third information indicates the value of the CFI by 1 bit, and the value 0 indicates the value of the CFI without using the third information, and the value 1 indicates the value of the CFI, including one of the following cases:
1,2 and 3; or alternatively
2,3 and 4; or alternatively
1,2 and 4; or alternatively
1,3 and 4; or alternatively
1,2,3 and 4.
In one possible implementation, the third information indicates the value of the CFI by 1 bit, and the value 1 indicates the value of the CFI without using the third information, and the value 0 indicates the value of the CFI, including one of the following cases:
1,2 and 3; or alternatively
2,3 and 4; or alternatively
1,2 and 4; or alternatively
1,3 and 4; or alternatively
1,2,3 and 4.
In one possible implementation, the third information indicates the value of the CFI by 2 bits, including one of the following cases:
1,2 and 3; or alternatively
2,3 and 4; or alternatively
1,2 and 4; or alternatively
1,3 and 4; or alternatively
1,2,3 and 4.
In one possible implementation, the third information indicates the value of the CFI by 2 bits, including one of the following cases:
1,2 and 3; or alternatively
2,3 and 4; or alternatively
1,2 and 4; or alternatively
1,3 and 4; or alternatively
1,2,3 and 4.
In one possible implementation, the third information indicates the value of the CFI by 2 bits, and the value 00 indicates the value of the CFI without using the third information, and the value of the CFI indicated by one of the values 01, 10, and 11 includes one of the following cases:
1,2 and 3; or alternatively
2,3 and 4; or alternatively
1,2 and 4; or alternatively
1,3 and 4; or alternatively
1,2,3 and 4.
Wherein the values 01, 10 and 11 indicate CFI values that are different.
In one possible implementation, the third information indicates the value of the CFI by 2 bits, and the value 11 indicates the value of the CFI indicated without using the third information, and the value of the CFI indicated by one of the values 00, 01 and 10 includes one of the following cases:
1,2 and 3; or alternatively
2,3 and 4; or alternatively
1,2 and 4; or alternatively
1,3 and 4; or alternatively
1,2,3 and 4.
Wherein the values of CFI indicated by the values 00, 01 and 10 are different.
In one possible implementation, the UE determines the value of the CFI according to a predefined definition, the CFI value comprising one of 1,2,3 and 4.
In one possible implementation, the UE determines the value of the CFI according to sixth information and a predefined, the sixth information comprising 1 bit;
the value 0 indicates a value for which CFI is determined without using a predefined definition, and the value 1 indicates a value for the CFI, including one of the following cases:
1,2 and 3; or alternatively
2,3 and 4; or alternatively
1,2 and 4; or alternatively
1,3 and 4; or alternatively
1,2,3 and 4;
or a value of 1 indicates a value indicating that the predefined CFI is not used, and a value of 0 indicates a value of the CFI, including one of the following:
1,2 and 3; or alternatively
2,3 and 4; or alternatively
1,2 and 4; or alternatively
1,3 and 4; or alternatively
1,2,3 and 4.
In one possible implementation, the UE determines the CFI according to a first correspondence and fourth information, where the fourth information is used to indicate a system bandwidth or a number of resource blocks RBs;
the first correspondence includes a correspondence between a value of a system bandwidth and a value of a CFI, or a correspondence between a number of RBs and a value of a CFI.
In one possible implementation, the UE determines the CFI according to fifth information, and the first correspondence and fourth information, the fifth information including 1 bit;
a value of 0 indicates a value of CFI determined without using the first correspondence and the fourth information, and a value of 1 indicates a value of CFI determined using the first correspondence and the fourth information;
or a value of 1 indicates that the first correspondence and fourth information are not used to determine the value of CFI, and a value of 0 identifies that the first correspondence and fourth information are used to determine the value of CFI.
In one possible implementation, the first correspondence includes a correspondence between a value of a system bandwidth and a value of a CFI, or a correspondence between a number of RBs and a value of a CFI, including:
when the number of the system bandwidths or the number of the RBs is smaller than a first number, the number of the CFIs is 3;
When the value of the system bandwidth or the number of RBs is greater than or equal to a first value and less than a second value, the value of the CFI is 2;
when the number of the system bandwidths or the number of the RBs is greater than or equal to a second value, the number of the CFIs is 1.
In one possible implementation, the first correspondence includes a correspondence between a value of a system bandwidth and a value of a CFI, or a correspondence between a number of RBs and a value of a CFI, including:
when the number of the system bandwidths or the number of the RBs is smaller than or equal to a first number, the number of the CFIs is 3;
when the value of the system bandwidth or the number of RBs is greater than a first value and less than or equal to a second value, the value of the CFI is 2;
when the number of the system bandwidths or the number of the RBs is greater than a second value, the value of the CFI is 1.
In one possible implementation, the first correspondence includes a correspondence between a value of a system bandwidth and a value of a CFI, or a correspondence between a number of RBs and a value of a CFI, including:
when the number of the system bandwidths or the number of the RBs is smaller than a first value, the number of the CFIs is 4;
When the value of the system bandwidth or the number of RBs is greater than or equal to a first value and less than a second value, the value of the CFI is 3;
when the number of the system bandwidths or the number of the RBs is greater than or equal to a second value and smaller than a third value, the number of the CFIs is 2;
when the number of the system bandwidths or the number of the RBs is greater than or equal to a third value, the number of the CFIs is 1.
In one possible implementation, the first correspondence includes a correspondence between a value of a system bandwidth and a value of a CFI, or a correspondence between a number of RBs and a value of a CFI, including:
when the number of the system bandwidths or the number of the RBs is smaller than or equal to a first number, the number of the CFIs is 4;
when the value of the system bandwidth or the number of RBs is greater than a first value and less than or equal to a second value, the value of the CFI is 3;
when the value of the system bandwidth or the number of RBs is greater than a second value and less than or equal to a third value, the value of the CFI is 2;
when the number of the system bandwidths or the number of the RBs is greater than a third value, the number of the CFIs is 1.
In one possible implementation, the first correspondence includes a correspondence between a value of a system bandwidth and a value of a CFI, or a correspondence between a number of RBs and a value of a CFI, including:
When the number of the system bandwidths or the number of the RBs is smaller than a first number, the number of the CFIs is 2; when the value of the system bandwidth or the value of the RB is greater than or equal to a second value, the value of the CFI is 1; or alternatively
When the number of the system bandwidths or the number of the RBs is smaller than a first number, the number of the CFIs is 3; when the value of the system bandwidth or the value of the RB is greater than or equal to a second value, the value of the CFI is 1; or alternatively
When the number of the system bandwidths or the number of the RBs is smaller than a first number, the number of the CFIs is 3; when the value of the system bandwidth or the value of the RB is greater than or equal to a second value, the value of the CFI is 2.
Optionally, the first value is the same as the second value.
In one possible implementation, the first correspondence includes a correspondence between a value of a system bandwidth and a value of a CFI, or a correspondence between a number of RBs and a value of a CFI, including:
when the number of the system bandwidths or the number of the RBs is smaller than or equal to a first number, the number of the CFIs is 2; when the value of the system bandwidth or the value of the RB is greater than a second value, the value of the CFI is 1; or alternatively
When the number of the system bandwidths or the number of the RBs is smaller than or equal to a first number, the number of the CFIs is 3; when the value of the system bandwidth or the value of the RB is greater than a second value, the value of the CFI is 1; or alternatively
When the number of the system bandwidths or the number of the RBs is smaller than or equal to a first number, the number of the CFIs is 3; when the value of the system bandwidth or the value of the RB is greater than a second value, the value of the CFI is 2.
Optionally, the first value is the same as the second value.
In a fourth aspect, a method for configuring a control format indicator CFI is provided, including the following procedures: the network equipment sends a third message and/or a fourth message to the user terminal UE, wherein the third message and the fourth message are used for indicating CFI (computational fluid dynamics) which is used for indicating the number of symbols occupied by PDCCH transmission in one subframe;
wherein the third information and/or the fourth information is information carried in a physical broadcast channel PBCH.
In one possible implementation, the third information and/or fourth information is carried in an MBMS master information block.
In one possible implementation, the third information indicates the value of the CFI by 1 bit, including one of the following cases:
1,2 and 3; or alternatively
2,3 and 4; or alternatively
1,2 and 4; or alternatively
1,3 and 4; or alternatively
1,2,3 and 4.
In one possible implementation, the third information indicates the value of the CFI by 1 bit, and the value 0 indicates the value of the CFI without using the third information, and the value 1 indicates the value of the CFI, including one of the following cases:
1,2 and 3; or alternatively
2,3 and 4; or alternatively
1,2 and 4; or alternatively
1,3 and 4; or alternatively
1,2,3 and 4.
In one possible implementation, the third information indicates the value of the CFI by 1 bit, and the value 1 indicates the value of the CFI without using the third information, and the value 0 indicates the value of the CFI, including one of the following cases:
1,2 and 3; or alternatively
2,3 and 4; or alternatively
1,2 and 4; or alternatively
1,3 and 4; or alternatively
1,2,3 and 4.
In one possible implementation, the third information indicates the value of the CFI by 2 bits, including one of the following cases:
1,2 and 3; or alternatively
2,3 and 4; or alternatively
1,2 and 4; or alternatively
1,3 and 4; or alternatively
1,2,3 and 4.
In one possible implementation, the third information indicates the value of the CFI by 2 bits, including one of the following cases:
1,2 and 3; or alternatively
2,3 and 4; or alternatively
1,2 and 4; or alternatively
1,3 and 4; or alternatively
1,2,3 and 4.
In one possible implementation, the third information indicates the value of the CFI by 2 bits, and the value 00 indicates the value of the CFI without using the third information, and the value of the CFI indicated by one of the values 01, 10, and 11 includes one of the following cases:
1,2 and 3; or alternatively
2,3 and 4; or alternatively
1,2 and 4; or alternatively
1,3 and 4; or alternatively
1,2,3 and 4.
Wherein the values 01, 10 and 11 indicate CFI values that are different.
In one possible implementation, the third information indicates the value of the CFI by 2 bits, and the value 11 indicates the value of the CFI indicated without using the third information, and the value of the CFI indicated by one of the values 00, 01 and 10 includes one of the following cases:
1,2 and 3; or alternatively
2,3 and 4; or alternatively
1,2 and 4; or alternatively
1,3 and 4; or alternatively
1,2,3 and 4.
Wherein the values of CFI indicated by the values 00, 01 and 10 are different.
In one possible implementation, the fourth information is used to indicate a system bandwidth or a number of resource blocks RBs.
In a fifth aspect, a PDCCH detection apparatus is provided. The apparatus provided in the present application has a function of implementing the above method aspect UE or network device, and includes means (means) for performing steps or functions corresponding to those described in the above method aspect. The steps or functions may be implemented in software, or in hardware (e.g., circuitry), or in a combination of hardware and software.
In one possible design, the apparatus includes one or more processors and a communication unit. The one or more processors are configured to support the apparatus to perform the corresponding functions of the UE or the network device in the above method.
Optionally, the apparatus may further comprise one or more memories for coupling with the processor, which holds the program instructions and/or data necessary for the apparatus. The one or more memories may be integrated with the processor or may be separate from the processor. The present application is not limited thereto.
In another possible design, the apparatus includes a transceiver, a processor, and a memory. The processor is configured to control the transceiver or the input/output circuit to transmit and receive signals, and the memory is configured to store a computer program, and the processor is configured to execute the computer program in the memory, to cause the apparatus to perform the method performed by the UE or the network device in the first aspect, the second aspect, any one of the possible implementation manners of the first aspect, or any one of the possible implementation manners of the second aspect.
In one possible design, the apparatus includes one or more processors and a communication unit. The one or more processors are configured to support the apparatus to perform the corresponding functions of the UE or the network device in the above method.
Optionally, the apparatus may further comprise one or more memories for coupling with the processor, which holds the program instructions and/or data necessary for the network device or satellite. The one or more memories may be integrated with the processor or may be separate from the processor. The present application is not limited thereto.
The apparatus may be located in or be a UE or a network device.
In another possible design, the apparatus includes a transceiver, a processor, and a memory. The processor is configured to control the transceiver or the input/output circuit to transmit and receive signals, and the memory is configured to store a computer program, and the processor is configured to execute the computer program in the memory, to cause the apparatus to perform the method performed by the UE or the network device in the first aspect, the second aspect, any one of the possible implementation manners of the first aspect, or any one of the possible implementation manners of the second aspect.
In a sixth aspect, a CFI configuration apparatus is provided. The apparatus provided in the present application has a function of implementing the above method aspect UE or network device, and includes means (means) for performing steps or functions corresponding to those described in the above method aspect. The steps or functions may be implemented in software, or in hardware (e.g., circuitry), or in a combination of hardware and software.
In one possible design, the apparatus includes one or more processors and a communication unit. The one or more processors are configured to support the apparatus to perform the corresponding functions of the UE or the network device in the above method.
Optionally, the apparatus may further comprise one or more memories for coupling with the processor, which holds the program instructions and/or data necessary for the apparatus. The one or more memories may be integrated with the processor or may be separate from the processor. The present application is not limited thereto.
In another possible design, the apparatus includes a transceiver, a processor, and a memory. The processor is configured to control the transceiver or the input/output circuit to transmit and receive signals, the memory is configured to store a computer program, and the processor is configured to execute the computer program in the memory, to cause the apparatus to perform the method performed by the UE or the network device in the third aspect, the fourth aspect, any one of the possible implementation manners of the third aspect, or any one of the possible implementation manners of the fourth aspect.
In one possible design, the apparatus includes one or more processors and a communication unit. The one or more processors are configured to support the apparatus to perform the corresponding functions of the UE or the network device in the above method.
Optionally, the apparatus may further comprise one or more memories for coupling with the processor, which holds the program instructions and/or data necessary for the network device or satellite. The one or more memories may be integrated with the processor or may be separate from the processor. The present application is not limited thereto.
The apparatus may be located in or be a UE or a network device.
In another possible design, the apparatus includes a transceiver, a processor, and a memory. The processor is configured to control the transceiver or the input/output circuit to transmit and receive signals, and the memory is configured to store a computer program, and the processor is configured to execute the computer program in the memory, to cause the apparatus to perform the method performed by the UE or the network device in the third aspect, the fourth aspect, any one of the possible implementation manners of the third aspect, or any one of the possible implementation manners of the fourth aspect.
A seventh aspect provides a computer readable storage medium storing a computer program comprising instructions for performing the method of the first aspect, the second aspect, the third aspect, the fourth aspect, or any one of the possible implementations of the first aspect, the second aspect, the third aspect, the fourth aspect.
In an eighth aspect, there is provided a computer program product comprising: computer program code which, when run on a computer, causes the computer to perform the method of the first aspect, the second aspect, the third aspect, the fourth aspect, or any one of the possible implementation manners of the first aspect, the second aspect, the third aspect, the fourth aspect.
Drawings
Fig. 1 is a schematic diagram of a unicast communication system and a broadcast communication system;
fig. 2 is a schematic diagram of a control region for PDCCH transmission;
fig. 3 is a schematic diagram of a PDCCH detection flow applicable to the embodiment of the present application;
fig. 4 is a schematic diagram of a CCE combination applicable to an embodiment of the present application;
fig. 5 is a schematic diagram of another CCE combination applicable to an embodiment of the present application;
fig. 6 is a schematic flow chart of a combination of CFI configuration and PDCCH detection, which is applicable to the embodiment of the present application;
fig. 7 is a schematic diagram of a PDCCH detection flow applicable to the embodiment of the present application;
fig. 8 is a schematic diagram of a PDCCH detection flow applicable to the embodiment of the present application;
fig. 9 is a block diagram of a PDCCH detection apparatus applicable to the embodiment of the present application;
fig. 10 is a block diagram of a PDCCH detection apparatus applicable to the embodiment of the present application;
fig. 11 is a block diagram of a configuration device of a CFI, which is applicable to the embodiment of the present application;
fig. 12 is a block diagram of a configuration device of a CFI, which is applicable to an embodiment of the present application.
Detailed Description
The present invention will be described in further detail with reference to the accompanying drawings.
The technical solution of the embodiment of the application can be applied to various communication systems, for example: fourth generation (4th Generation,4G), 4G systems include long term evolution (long term evolution, LTE) systems, worldwide interoperability for microwave access (worldwide interoperability for microwave access, wiMAX) communication systems, future fifth generation (5th Generation,5G) systems such as new generation radio access technologies (new radio access technology, NR), and future communication systems such as 6G systems, etc.
The present application will present various aspects, embodiments, or features about a system that may include multiple devices, components, modules, etc. It is to be understood and appreciated that the various systems may include additional devices, components, modules, etc. and/or may not include all of the devices, components, modules etc. discussed in connection with the figures. Furthermore, combinations of these schemes may also be used.
In addition, in the embodiments of the present application, the term "exemplary" is used to mean serving as an example, instance, or illustration. Any embodiment or design described herein as "exemplary" is not necessarily to be construed as preferred or advantageous over other embodiments or designs. Rather, the term use of an example is intended to present concepts in a concrete fashion.
The network architecture and the service scenario described in the embodiments of the present application are for more clearly describing the technical solution of the embodiments of the present application, and do not constitute a limitation on the technical solution provided in the embodiments of the present application, and those skilled in the art can know that, with the evolution of the network architecture and the appearance of the new service scenario, the technical solution provided in the embodiments of the present application is also applicable to similar technical problems.
The following is a description of some of the terms of the embodiments of the present application to facilitate understanding by those skilled in the art.
1) A terminal, also known as a user equipment/user terminal (UE), a Mobile Station (MS), a Mobile Terminal (MT), etc., is a device that provides voice and/or data connectivity to a user. Such as a handheld device, an in-vehicle device, etc., having a wireless connection function. Currently, some examples of terminals are: a mobile phone, a tablet, a notebook, a palm, a mobile internet device (mobile internet device, MID), a wearable device, a Virtual Reality (VR) device, an augmented reality (augmented reality, AR) device, a wireless terminal in industrial control (industrial control), a wireless terminal in unmanned (self driving), a wireless terminal in teleoperation (remote medical surgery), a wireless terminal in smart grid (smart grid), a wireless terminal in transportation security (transportation safety), a wireless terminal in smart city (smart city), a wireless terminal in smart home (smart home), a wireless terminal in terrestrial broadcast (terrestrial broadcast), and the like.
2) The network device is a device in a wireless network, e.g. the network device may be a radio access network (radio access network, RAN) node (or device), also referred to as a base station, that accesses the terminal to the wireless network. Currently, some examples of RAN nodes are: a further evolved Node B (gNB), a transmission and reception point (transmission reception point, TRP), an evolved Node B (eNB), a radio network controller (radio network controller, RNC), a Node B (Node B, NB), a base station controller (base station controller, BSC), a base transceiver station (base transceiver station, BTS), a home base station (e.g., home evolved NodeB, or home Node B, HNB), a baseband unit (BBU), or a wireless fidelity (wireless fidelity, wifi) Access Point (AP), etc. In addition, in one network structure, the network device may include a Centralized Unit (CU) node, or a Distributed Unit (DU) node, or a RAN device including a CU node and a DU node. The RAN equipment comprising CU nodes and DU nodes splits the protocol layers of the eNB in the long term evolution (long term evolution, LTE) system, functions of part of the protocol layers are put in the CU for centralized control, and functions of the rest part or all of the protocol layers are distributed in DUs, which are centralized controlled by the CU. As another example, the network device may be a Core Network (CN) device that provides service support for the terminal, where common core network devices include an access and mobility management function (access and mobility management function, AMF) entity, a session management function (session management function, SMF) entity, a user plane function (user plane function, UPF) entity, and so on, which are not listed herein. The AMF entity can be responsible for access management and mobility management of the terminal; the SMF entity may be responsible for session management, such as session establishment for a user, etc.; the UPF entity may be a functional entity of the user plane, mainly responsible for connecting to external networks. The base station can be a high-tower high-power base station with high antenna position, high transmitting power and long coverage area, or a low-tower low-power base station with low antenna position, low transmitting power and short coverage area.
3) Data transmission modes, wireless communication systems are mainly divided into 3 data transmission modes, i.e., unicast (Unicast), broadcast (Broadcast) and Multicast/Multicast (Multicast).
4) A cell, also called a cell, a base station or an area covered by a part of a base station (generally referred to as an area covered by a radio signal), and terminals located in the cell may communicate with the base station through a radio channel.
5) The higher layer, also called higher layer protocol layer, is at least one of each protocol layer above the physical layer. The higher protocol layer may specifically be at least one of the following protocol layers: a medium access control (medium access control, MAC) layer, a radio link control (radio link control, RLC) layer, a packet data convergence protocol (packet data convergence protocol, PDCP) layer, a radio resource control (radio resource control, RRC) layer, and a non-access layer (non access stratum, NAS). It is to be appreciated that higher layer signaling can also be generally equivalent to configuration information.
6) A broadcast dedicated carrier including a carrier for carrying data information and/or control information in a multimedia broadcast multicast service dedicated (MBMS-scheduled) cell, or a carrier for carrying data information and/or control information in a multimedia broadcast multicast service/Unicast-mixed (MBMS/Unicast-mixed) cell, or a carrier for carrying data information and/or control information in a further enhanced multimedia broadcast multicast service/Unicast-mixed (feed MBMS/Unicast-mixed) cell.
7) And the UE accesses the broadcast special carrier, wherein the UE accesses the broadcast special carrier at least comprises the information such as the UE detection synchronous signal, the master information block (such as a master information block (master information block, MIB)) and the like acquired by the UE. The UE detects a primary synchronization signal (Primary Synchronization Signa, PSS) and a secondary synchronization signal (Secondary Synchronization Signal, SSS) sent by a network device, the UE acquires time and frequency synchronization with a cell corresponding to the network device, and the UE determines a physical cell identifier and a cell identifier group number to which the physical cell identifier belongs. The cell is a cell to which data information and/or control information carried on a broadcast dedicated carrier belongs. And the UE decodes the physical broadcast channel PBCH to obtain the information of the main information block MIB, the system information block SIB1 and the like of the cell. The master information block MIB also comprises MIB-MBMS sent by a multimedia broadcast multicast service (MBMS-decoded) special cell, and comprises information such as downlink system bandwidth, wireless system frame number SFN and the like; the system message block SIB1 also comprises SIB1-MBMS sent by a multimedia broadcast multicast service (MBMS-decoded) special cell, and comprises scheduling information of a System (SI) message.
8) And the processing process of the downlink control information DCI comprises the steps of CRC addition, channel coding, rate matching and the like.
CRC addition by adding toThe transmission block adds a Cyclic Redundancy Check (CRC), and DCI transmission can obtain error detection. The transport block, i.e. the bit sequence of the payload is a 0 ，a 1 ，a 2 ，a 3 ，...，a A-1 The parity bit sequence is p 0 ，p 1 ，p 2 ，p 3 ，...，p L-1 Where a is the number of payload bits and L is the number of parity bits. The transport block bit sequence after adding CRC is b 0 ，b 1 ，b 2 ，b 3 ，...，b B-1 Wherein b=a+l. After adding CRC, the CRC bit sequence is scrambled by the corresponding RNTI sequence to form bit sequence c 0 ，c 1 ，c 2 ，c 3 ，...，c B-1 。
Channel coding, the bit sequence of the coding block input to the channel coding is c 0 ，c 1 ，c 2 ，c 3 ，...，c K-1 Where K is the number of bits that need to be encoded. Bits encoded using tail biting convolutional codes areWhere i is the index of the encoder output encoded code stream and i=0, 1,2, D is the number of bits per encoded code stream, d=k.
Rate matching, rate matching of DCI includes 3 bitstreamsAnd->Is used for interleaving, bit collection and circular buffer generation.
The bit sequence input to the block interleaver is represented asThe bits after sub-block interleaving are expressed asD is the number of bits.
Length of K w ＝3K П Is generated according to the following requirements: The bit sequence of the rate matching output is e k K=0, 1,.. the sequence length is E.
The method of bit collection is as follows: let k=0 and j=0; when k < E, ifThenAnd k=k+1; j=j+1. The bit collecting module multiplexes the sub-blocks which are interleaved together to obtain a length of K w ＝3K ∏ Repeatedly put said sequence w into a bit sequence E of length E k Until it is filled. Where E is the number of bits transmitted by the physical channel and is related to the aggregation level of the PDCCH candidates. For example, if the aggregation level of PDCCH candidates is 8, quadrature phase shift keying (Quadrature Phase Shift Keying, QPSK) modulation is used, then e=2×8×9×4=576 bits; if the aggregation level of PDCCH candidates is 16, QPSK modulation is used, then e=2x16x9x4=1152 bits.
The starting position of the coded bit collection of the CCE is that the sequence e after the bit collection carried on the CCE k A bit of the sequence w before the bit collection corresponding to the first bit or a bit index of the sequence w before the bit collection. For example, a PDCCH candidate with an aggregation level of 8 consists of 8 CCEs, where the first bit after the collection of the coded bits of the first CCE is e 0 The first bit e after the code bit is collected 0 The bit before the corresponding code bit collection is w 0 The starting position of the code bit collection of the first CCE is w 0 Or 0; if the first bit after the collection of the coded bits of the second CCE is e 71 The said braidingFirst bit e after code bit collection 71 The bit before the corresponding code bit collection is w 71 The starting position of the code bit collection of the first CCE is w 71 Or 71; the starting position of the code bit collection of the first CCE is different from the starting position of the code bit collection of the second CCE.
9) The terms "system" and "network" in embodiments of the present application may be used interchangeably. "plurality" means two or more, and the like. "and/or" describes an association relationship of an association object, meaning that there may be three relationships, e.g., a and/or B, may represent: a exists alone, A and B exist together, and B exists alone. Furthermore, for elements (elements) that appear in the singular forms "a," "an," and "the," it does not mean "one or only one" unless the context clearly dictates otherwise. For example, "a device" means a device for one or more of such devices. Further, at least one (at least one of),. The term "means one or any combination of subsequent association objects, e.g., at least one of a, b, or c(s), may represent: a, b, c, a-b, a-c, b-c or a-b-c, wherein a, b, c can be single or multiple.
And, unless specified to the contrary, the embodiments of the present application refer to the ordinal terms "first," "second," etc., as used to distinguish between multiple objects, and are not to be construed as limiting the order, timing, priority, or importance of the multiple objects. For example, the first data packet and the second data packet are only for distinguishing between different data packets, and are not intended to represent the difference in content, priority, transmission order, importance, etc. of the two data packets.
In order to facilitate understanding of the embodiments of the present application, first, an application scenario used in the present application will be described.
A multimedia broadcast multicast service (Multimedia Broadcast Multicast Service, MBMS) is first introduced. Wireless communication systems are largely divided into 3 data transmission modes, unicast (Unicast), broadcast (Broadcast) and Multicast/Multicast (Multicast). In contrast to unicast point-to-point delivery, in a broadcast or multicast communication system, one data signal may be received by multiple terminals. As shown in fig. 1 (1), a Base Station (BS) and UEs 1 to 2 form a unicast communication system, and the BS sends different data signals (such as signal 1 and signal 2 in fig. 1 (1)) to UEs 1 to 2 respectively; in fig. 1 (2), BS and UEs 1 to 2 form a broadcast communication system, and the BS simultaneously transmits the same data signal (e.g., signal 1 in fig. 1 (2)) to UEs 1 to 2.
The rapid development of internet technology and the rapid popularization of large-screen multimedia terminals has prompted a large number of large-bandwidth high-rate multimedia services, such as television broadcasting, ball game rebroadcasting, internet live broadcasting, time-frequency conferences, and the like. Compared with the general mobile data service, the multimedia service allows a plurality of users to simultaneously receive the same data, and has the characteristics of high transmission data and large coverage. In order to effectively utilize wireless network resources, the third generation partnership project (3rd Generation Partnership Project,3GPP) introduces MBMS, so that point-to-multipoint data transmission is realized, and the utilization rate of air interface resources is improved. A physical multicast channel (Physical Multicast Channel, PMCH) is defined in LTE for data transmission of MBMS services. The MBMS service uses a multimedia broadcast multicast single frequency network (Multimedia Broadcast multicast service Single Frequency Network, MBSFN) to jointly transmit MBMS signals on the same time domain, frequency domain and space domain resources through a plurality of cells which are mutually synchronous, and then the combination of multi-cell signals is naturally formed in the air, so that the signal-to-interference-and-noise ratio (Signal to Interference plus Noise Ratio, SINR) of the UE side is improved.
MBMS cells (cells) are classified into the following three types according to the transmitted data: a multimedia broadcast multicast service dedicated (MBMS-scheduled) cell, a multimedia broadcast multicast service/Unicast-mixed (MBMS/Unicast) cell, and a further enhanced multimedia broadcast multicast service (Further enhanced Multimedia Broadcast Multicast Service, femms)/Unicast mixed cell, wherein the MBMS dedicated cell transmits only the MBMS service, the MBMS/Unicast mixed cell transmits both the MBMS service and the Unicast service, the femms/Unicast mixed cell is a special MBMS/Unicast-mixed cell and both the MBMS service and the Unicast service, and at least one of the following conditions is satisfied in the femms/Unicast mixed cell: subframe (subframe) 4 configures an MBSFN subframe, or subframe 9 configures an MBSFN subframe, or both subframe 4 and subframe 9 configure an MBSFN subframe, and there is a subframe within the FeMBMS/unicast hybrid cell that does not include a unicast control region, an MBSFN subframe is a subframe for transmitting an MBMS service. For MBMS-decoded cells, there is at least one non-MBSFN subframe every 40ms for transmitting a primary synchronization signal (Primary Synchronization Signal, PSS), a secondary synchronization signal (Secondary Synchronization Signal, SSS), a physical broadcast channel (Physicai Broadcast Channel, PBCH), a physical downlink control channel (Physical Downlink Control Channel, PDCCH), a physical downlink shared channel (Physical Downlink Shared Channel, PDSCH), etc., which is called a cell acquisition subframe (Cell Acquisition Subframe, CAS). The physical channel or signal in the CAS subframe cannot be multi-cell signal combining, resulting in the UE receiving a lower SINR of the physical channel in the CAS subframe than the PMCH signal in the MBSFN subframe. When the channel condition is poor, the SINR of a physical channel (such as PDCCH) in the CAS subframe received by the UE is lower than the demodulation threshold, and the blind detection of PDCCH is unsuccessful, so that the UE cannot normally receive the system information (System Information, SI) carried in the PDSCH, and thus cannot receive the PMCH data signal.
In a long term evolution (Long Term Evolution, LTE) system, a physical downlink control channel (Physical Downlink Control Channel, PDCCH) may be transmitted in a downlink subframe for transmitting downlink control information (Downlink Control Information, DCI). The region used for PDCCH transmission is a control region, which occupies the first N orthogonal frequency division multiplexing (Orthogonal Frequency Division Multiplexing, OFDM) symbols of one downlink subframe, where N is 1,2,3,4, and time domain interleaving is performed on different OFDM symbols. Fig. 2 is a schematic diagram of a control region, which occupies 3 consecutive OFDM symbols in fig. 2.
The transmission of the PDCCH channel is organized in control channel elements (Control Channel Element, CCEs), with 1 CCE containing 9 resource element groups (resource)rce Element Group, REG). The control region of each subframe consists of a series of control channel elements CCE numbered from 0 to N CCE，k -1, wherein N CCE，k Is the total CCE number in the control region on subframe k. The PDCCH may be transmitted on logically consecutive M CCEs, where the possible values of M are 1,2,4,8, called aggregation levels (Aggregation Level, AL). The starting CCE index, also referred to as the first CCE index, of a PDCCH candidate refers to the lowest or smallest index of CCEs constituting the PDCCH candidate. A series of PDCCH candidates in the search space constitute a PDCCH candidate set.
And the UE performs PDCCH blind detection in the control region and searches whether the PDCCH transmitted by the UE exists. The PDCCH blind detection process is that the UE uses its corresponding radio network temporary identifier (Radio Network Temporary Identifier, RNTI) to attempt decoding on PDCCH candidates of different CCE aggregation levels and DCI formats (formats) in the PDCCH search space of the control region of the downlink subframe, and if the decoding is correct, the UE receives DCI transmitted for the UE. The search space of the UE is divided into a common search space (Common Search Space) and a user-specific search space (UE-specific Search Space). The public search space is mainly used for transmitting cell-specific control information, such as paging information, system information, multicast control information and the like; the user-specific search space is mainly used for transmitting control information related to uplink and downlink data channel scheduling. The UE detects only PDCCH in the common search space in CAS subframes.
The Common Search space starts from CCE index 0, occupies 16 CCEs that are logically consecutive, and only supports two aggregation levels of 4 and 8, as shown in table 1, where Search space represents a Search space of a cell, type represents a Type of a Search space of a cell, UE-specific represents a user-specific Search space, common represents a Common Search space, aggregation level represents an aggregation level, size [ in CCEs ] represents a Size of CCEs (i.e., a number of CCEs), number of PDCCH Candidates represents a number of PDCCH candidates, and in a specific user-specific Search space, the aggregation level is 1, the number of CCEs is 6, the number of PDCCH candidates is 6, the aggregation level is 2, the number of CCEs is 12, the number of PDCCH candidates is 6, the aggregation level is 4, the number of CCEs is 8, the number of PDCCH candidates is 2, the aggregation level is 8, the number of CCEs is 16, and the number of PDCCH candidates is 2; in the common search space, the aggregation level is 4, the number of CCEs is 16, the number of PDCCH candidates is 4, the aggregation level is 8, the number of CCEs is 16, and the number of PDCCH candidates is 2.
TABLE 1
The control format indication (Control Format Indicator, CFI) is described below, and the physical control format indication channel (Physical Control Format Indicator Channel, PCFICH) carries CFI information for indicating the size of the control region on each subframe, that is, the PDCCH on each subframe occupies several symbols in the time domain. Table 2 lists the number of symbols that the PDCCH may occupy on each subframe, where a subframe includes: 1, subframes 1 and 6 of frame structure type 2 or subframe of frame structure type 3 with the same duration as DwPTS configured by special subframe, if the number of downlink Resource Blocks (RBs) is greater than 10, the number of symbols occupied by pdcch on subframe is 1 or 2, if the number of downlink RBs is less than or equal to 10, the number of symbols occupied by pdcch on subframe is 2;2, the subcarrier spacing is 15kHz and is configured with MBSFN subframes of 1 or 2 cell-specific antenna ports, if the number of RBs is greater than 10, the number of symbols occupied by PDCCH on the subframes is 1 or 2, if the number of downlink RBs is less than or equal to 10, the number of symbols occupied by PDCCH on the subframes is 2; 3. MBSFN subframes with 15kHz subcarrier spacing and 4 cell-specific antenna ports are configured, wherein if the number of RBs is more than 10, the number of symbols occupied by PDCCH on the subframes is 2, and if the number of downlink RBs is less than or equal to 10, the number of symbols occupied by PDCCH on the subframes is 2; 4. MBSFN subframes with subcarrier spacing of 7.5kHz or 1.25kHz, wherein if the number of RBs is more than 10, the number of symbols occupied by PDCCH on the subframes is 0, and if the number of downlink RBs is less than or equal to 10, the number of symbols occupied by PDCCH on the subframes is 0; 5. a non-MBSFN subframe (subframe 6 except subframe structure type 2) configured with a positioning reference signal, wherein if the number of RBs is greater than 10, the number of symbols occupied by PDCCH on the subframe is 1 or 2 or 3, and if the number of downlink RBs is less than or equal to 10, the number of symbols occupied by PDCCH on the subframe is 2 or 3; 6. otherwise, if the number of RBs is greater than 10, the number of symbols occupied by PDCCH on the subframe is 1 or 2 or 3, and if the number of downlink RBs is less than or equal to 10, the number of symbols occupied by PDCCH on the subframe is 2 or 3 or 4.
TABLE 2
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In summary, the UE detects and obtains CFI information in the PCFICH, determines the number of symbols occupied by the PDCCH in the time domain, and then performs blind detection on the determined PDCCH to obtain information such as DCI, that is, the UE needs to successfully detect both the PCFICH and the PDCCH to obtain DCI information.
Like PDCCH, the enhanced physical downlink control channel (Enhanced physical downlink control channel, EPDCCH) carries scheduling information and is transmitted with one or several aggregated enhanced control channel elements (Enhanced Control Channel Element, ECCE). The number of ECCEs used for EPDCCH of different formats is shown in table 3, where it is known from the number of ECCEs used that the maximum aggregation level supported by EPDCCH is 32, specifically, the format of EPDCCH is 0, the number of ECCEs used for EPDCCH is 2 when locally transmitted (Localized transmission) in Case a, the number of ECCEs used for EPDCCH is 2 when distributed transmitted (Distributed transmission) in Case a, the number of ECCEs used for EPDCCH is 1 when locally transmitted in Case B, and the number of ECCEs used for EPDCCH is 1 when distributed transmitted in Case B; the format of EPDCCH is 1, the number of ECCEs used by EPDCCH is 4 when locally transmitted under Case a, the number of ECCEs used by EPDCCH is 4 when distributed transmitted under Case a, the number of ECCEs used by EPDCCH is 2 when locally transmitted under Case B, and the number of ECCEs used by EPDCCH is 2 when distributed transmitted under Case B; the format of EPDCCH is 2, the number of ECCEs used by EPDCCH is 8 in Case a local transmission, the number of ECCEs used by EPDCCH is 8 in Case a distributed transmission, the number of ECCEs used by EPDCCH is 4 in Case B local transmission, and the number of ECCEs used by EPDCCH is 4 in Case B distributed transmission; the format of EPDCCH is 3, the number of ECCEs used by EPDCCH is 16 when locally transmitted in Case a, the number of ECCEs used by EPDCCH is 16 when distributed transmitted in Case a, the number of ECCEs used by EPDCCH is 8 when locally transmitted in Case B, and the number of ECCEs used by EPDCCH is 8 when distributed transmitted in Case B; the format of EPDCCH is 4, the number of ECCEs used by EPDCCH is not configured in Case a for localized transmission, the number of ECCEs used by EPDCCH is 32 in Case a for distributed transmission in Case a, the number of ECCEs used by EPDCCH is not configured in Case B for localized transmission, and the number of ECCEs used by EPDCCH is 16 in Case B for distributed transmission.
TABLE 3 Table 3
Similarly, the number of ECCEs used by the MTC physical downlink control channels (MTC physical downlink control channel, MPDCCH) of different formats is shown in table 4, where the maximum aggregation level supported by the MPDCCH is known to be 24 according to the number of ECCEs used, specifically, the format of the MPDCCH is 0, the number of ECCEs used by the MPDCCH is 2 in the case of local transmission (Localized transmission) when the number of enhanced resource element groups (Enhanced Resource Element Group, EREGs) included in one ECCE is 4, the number of ECCEs used by the MPDCCH is 2 in the case of distributed transmission (Distributed transmission) when the number of EREGs included in one ECCE is 4, the number of ECCEs used by the MPDCCH is 1 in the case of local transmission when the number of EREGs included in one ECCE is 8, and the number of ECCEs used by the MPDCCH is 1 in the case of distributed transmission when the number of EREGs included in one ECCE is 8; the format of MPDCCH is 1, the number of ECCEs used for MPDCCH at the time of local transmission is 4 in the case where the number of EREGs included in one ECCE is 4, the number of ECCEs used for MPDCCH at the time of distributed transmission is 4 in the case where the number of EREGs included in one ECCE is 4, the number of ECCEs used for MPDCCH at the time of local transmission is 2 in the case where the number of EREGs included in one ECCE is 8, and the number of ECCEs used for MPDCCH at the time of distributed transmission is 2 in the case where the number of EREGs included in one ECCE is 8; the format of MPDCCH is 3, the number of ECCEs used for MPDCCH at the time of local transmission is 8 in the case where the number of EREGs included in one ECCE is 4, the number of ECCEs used for MPDCCH at the time of distributed transmission is 8 in the case where the number of EREGs included in one ECCE is 8, the number of ECCEs used for MPDCCH at the time of local transmission is 4 in the case where the number of EREGs included in one ECCE is 8, and the number of ECCEs used for MPDCCH at the time of distributed transmission is 4 in the case where the number of EREGs included in one ECCE is 8; the format of MPDCCH is 3, the number of ECCEs used for MPDCCH at the time of local transmission is 16 in the case where the number of EREGs included in one ECCE is 4, the number of ECCEs used for MPDCCH at the time of distributed transmission is 16 in the case where the number of EREGs included in one ECCE is 4, the number of ECCEs used for MPDCCH at the time of local transmission is 8 in the case where the number of EREGs included in one ECCE is 8, and the number of ECCEs used for MPDCCH at the time of distributed transmission is 8 in the case where the number of EREGs included in one ECCE is 8; the format of MPDCCH is 1, the number of ECCEs used for MPDCCH at the time of local transmission is not configured in the case where the number of EREGs included in one ECCE is 4, the number of ECCEs used for MPDCCH at the time of distributed transmission is not configured in the case where the number of EREGs included in one ECCE is 8, the number of ECCEs used for MPDCCH at the time of local transmission is not configured in the case where the number of EREGs included in one ECCE is 8, and the number of ECCEs used for MPDCCH at the time of distributed transmission is not configured in the case where the number of EREGs included in one ECCE is 4; the MPDCCH format is 5, the number of ECCEs used for MPDCCH at the time of local transmission is 24 in the case where the number of EREGs included in one ECCE is 4, the number of ECCEs used for MPDCCH at the time of distributed transmission is 24 in the case where the number of EREGs included in one ECCE is 4, the number of ECCEs used for MPDCCH at the time of local transmission is 12 in the case where the number of EREGs included in one ECCE is 8, and the number of ECCEs used for MPDCCH at the time of distributed transmission is 12 in the case where the number of EREGs included in one ECCE is 8.
TABLE 4 Table 4
The existing CCE aggregation level of the common UE is 8 at maximum, the UE can only blindly detect PDCCHs with the aggregation level not exceeding 8, and if the aggregation level of PDCCHs transmitted by the base station exceeds 8, such as 16 or 24, for the existing UE with maximum CCE aggregation level of 8, the UE cannot blindly detect the PDCCHs transmitted by the base station, and cannot detect information such as DCI.
In view of this, in order to ensure that when the aggregation level of the PDCCH sent by the network device is greater than the aggregation level supported by the terminal, the PDCCH sent by the network device can be blindly detected by the terminal, so as to improve the success rate of PDCCH detection, the embodiment of the application provides a method for detecting the PDCCH.
Specifically, in the method, the first UE accesses a broadcast dedicated carrier, detects at least one first PDCCH candidate in a PDCCH candidate set on the broadcast dedicated carrier, where the first PDCCH candidate is composed of n×l CCEs, and in the n×l CCEs, starting positions of code bit collection of the first (N/2) ×l CCEs and the last (N/2) ×l CCEs are the same, and the first UE can detect the first PDCCH candidate composed of n×l CCEs, so when an aggregation level of a PDCCH sent by the network device is greater than or equal to an aggregation level of the first UE, the first UE can detect the PDCCH through combining the CCEs, thereby improving a success rate of PDCCH detection.
Example 1
The specific process of PDCCH detection will be described in detail in the following embodiments, first with reference to the PDCCH detection process shown in fig. 3, which includes:
step 301: the network device sends a signal to the UE for access by the UE on a broadcast dedicated carrier.
The UE in step 301 may include a first UE and a second UE in the embodiments of the present application.
For example, the information sent by the network device for the UE to access includes a synchronization signal and an MBMS master information block carried by a physical broadcast channel PBCH.
Specifically, the broadcast dedicated carrier includes a carrier for carrying data information and/or control information in a multimedia broadcast multicast service dedicated (MBMS-scheduled) cell, or a carrier for carrying data information and/or control information in a multimedia broadcast multicast service/Unicast-mixed (MBMS/Unicast-mixed) cell, or a carrier for carrying data information and/or control information in a further enhanced multimedia broadcast multicast service/Unicast-mixed (MBMS/Unicast-mixed) cell. And the UE accesses the broadcast special carrier, wherein the UE accesses the broadcast special carrier at least comprises the information such as the UE detection synchronizing signal, the UE acquisition main information block and the like. The UE detects a primary synchronization signal PSS and a secondary synchronization signal SSS sent by network equipment, the UE acquires time and frequency synchronization with a cell corresponding to the network equipment, and the UE determines a physical cell identifier and a cell identifier group number to which the physical cell identifier belongs. The cell is a cell to which data information and/or control information carried on a broadcast dedicated carrier belongs. And the UE decodes the physical broadcast channel PBCH to obtain the information of the main information block MIB, the system information block SIB1 and the like of the cell. The master information block MIB also comprises MIB-MBMS sent by a multimedia broadcast multicast service (MBMS-decoded) special cell, and comprises information such as downlink system bandwidth, wireless system frame number SFN and the like; the system message block SIB1 also comprises SIB1-MBMS sent by a multimedia broadcast multicast service (MBMS-decoded) special cell, and comprises scheduling information of a System (SI) message.
Optionally, for the first UE, the signal sent by the network device for the first UE to access may be further used to indicate the first capability of the first UE, and/or to indicate the first UE to detect at least one first PDCCH candidate.
Step 302: the first UE receives a signal for UE access and accesses a broadcast special carrier.
A UE accessing a broadcast dedicated carrier (also referred to as a "broadcast UE") is a UE that receives data of broadcast and/or multicast traffic, and may determine whether the UE is a broadcast UE by one or more of the following: the UE works on MBMS related cells, wherein the MBMS related cells comprise one or more of MBMS/unicast mixed cells, feMBMS/unicast mixed cells and MBMS special cells; and the UE detects that the cyclic redundancy check (Cyclic Redundancy Check, CRC) is scrambled by the M-RNTI.
For example, in the embodiment of the present application, the first UE refers to a UE with a high version, that is, a UE supporting a protocol of 16 or more versions, and the first UE is also called a new UE. For example, the aggregate capability of the first UE is 4 or 8, 16 or higher, etc. More specifically, the first UE may be a UE supporting the method for detecting PDCCH in the embodiment of the present application.
Optionally, the first UE may be capable of acquiring a first capability of the first UE, and the first capability of the first UE may be used to indicate an aggregate capability of the first UE.
The first capability includes at least one of:
the first UE supports detection of a first PDCCH candidate consisting of 16 CCEs, namely the aggregation capability of the first UE is 16;
the first UE supports version 16 protocols;
the first UE supports the 16 version broadcast or multicast feature.
The first capability of the first UE may be a pre-agreed capability or may be a first capability indicated by the network device.
Correspondingly, in order to distinguish from the first UE, a second UE is also provided in the embodiment of the present application, where in the embodiment of the present application, the second UE refers to a UE with a low version, that is, a UE that does not support 16 or more versions of protocols, that is, a UE with only 16 or less versions of protocols, and the second UE is also referred to as an old UE. For example, the aggregation capability of the second UE is 4 or 8, etc. More specifically, the second UE may be a UE that does not support the method for detecting PDCCH in the embodiment of the present application.
Optionally, after the network device confirms that the first UE accesses the broadcast dedicated carrier, the network device sends indication information to the first UE on the broadcast dedicated carrier, for indicating a first capability of the first UE (such as an aggregation capability of the first UE), and/or for indicating the first UE to detect at least one first PDCCH candidate.
Step 303: the first UE detects at least one first PDCCH candidate in the PDCCH candidate set on the broadcast dedicated carrier, where the first PDCCH candidate is composed of n×l CCEs, starting positions of coded bit collection of the first (N/2) ×l CCEs and the second (N/2) ×l CCEs that respectively compose the first PDCCH candidate are the same, L is an integer greater than or equal to 8, and N is an even number greater than 0.
In the n×l CCEs, the starting positions of the code bit collection of the front (N/2) L CCEs and the rear (N/2) L CCEs are the same, and for example, the CCE indexes (such as CCE logical codes) may be ordered from small to large, where the first CCE to the (N/2) L CCEs are the front (N/2) L CCEs, and the (N/2) l+1 CCEs to the last CCE are the rear (N/2) L CCEs. Or, CCE indexes 0 to CCE index (N/2) L-1 are the first (N/2) L CCEs, and CCE indexes (N/2) L to the last CCE are the last (N/2) L CCEs.
Optionally, the first (N/2) L CCEs and the second (N/2) L CCEs respectively constitute two second PDCCH candidates.
Optionally, the first (N/2) L CCEs and the second (N/2) L CCEs constitute a second PDCCH candidate and a third PDCCH candidate, respectively. For example, the first (N/2) L CCEs constitute a second PDCCH candidate and the later (N/2) L CCEs constitute a third PDCCH candidate, wherein the third PDCCH candidate is different from scrambling and/or interleaving of the second PDCCH candidate; or the first (N/2) L CCEs constitute a third PDCCH candidate and the later (N/2) L CCEs constitute a second PDCCH candidate. Wherein the scrambling and/or interleaving of the third PDCCH candidate is different from that of the second PDCCH candidate, i.e. the scrambling and/or interleaving process of the third PDCCH candidate generated by the network device is different from that of the second PDCCH candidate, and then the descrambling and/or deinterleaving process of the third PDCCH candidate by the corresponding first UE is different from that of the second PDCCH candidate by the first UE.
Taking the first UE to detect one first PDCCH candidate in the PDCCH candidate set as an example, explaining how the network device transmits the PDCCH candidates on the broadcast dedicated carrier, if the first (N/2) x L CCEs and the second (N/2) x L CCEs respectively form two second PDCCH candidates, the one first PDCCH candidate may be regarded as being formed by two second PDCCH candidates, if the first (N/2) x L CCEs form the second PDCCH candidates, and the second (N/2) x L CCEs form the third PDCCH candidates; or the first (N/2) x L CCEs form a third PDCCH candidate, the second (N/2) x L CCEs form a second PDCCH candidate, and the first PDCCH candidate may be regarded as being formed by the second PDCCH candidate and the third PDCCH candidate, where when the first PDCCH is plural, the process of transmitting the PDCCH candidates by the network device is similar, and will not be described herein.
In one implementation, the network device sends two second PDCCH candidates to the UE on a broadcast dedicated carrier.
The UE includes a first UE and a second UE.
For the first UE, if the first UE determines to detect the first PDCCH candidate, after the first UE receives the two second PDCCH candidates, the first UE uses the two second PDCCH candidates as one first PDCCH candidate, and the first UE detects the one first PDCCH candidate. In this way, compared with the second UE, the aggregation level capability supported by the first UE is higher, or the first UE may jointly decode the two repeated second candidates, thereby improving the decoding capability of the UE.
For the first UE, if the first UE determines that the first PDCCH candidate is not detected, the first UE receives two second PDCCH candidates and then detects the two second PDCCH candidates respectively.
Wherein the first UE determines whether to detect the first PDCCH candidate or not, as will be described in detail below.
For the second UE, after receiving the two second PDCCH candidates, the second UE detects the two second PDCCH candidates respectively. In this way, the aggregation level n×l is split into two independent parts (i.e., two second PDCCHs), and the two second PDCCHs are independent of each other and have the same starting position of the coded bit collection of CCEs, so that the two second PDCCHs can be decoded independently for the second UE.
If the second UE receives a fourth PDCCH candidate, the fourth PDCCH candidate is composed of n×l CCEs, and starting positions of coded bit collection of the first (N/2) L CCEs and the last (N/2) L CCEs that respectively compose the fourth PDCCH candidate are different. After receiving the fourth PDCCH candidate, the second UE can only detect the first (N/2) L CCEs and cannot detect the second (N/2) L CCEs. Compared to the second UE receiving two second PDCCH candidates, the second UE receiving one fourth PDCCH candidate can only detect one CCE of length (N/2) ×l, and the decoding capability of the second UE is reduced. For example, when N is 2 and l is 8, the aggregation level of the fourth PDCCH candidate is 16, the starting positions of the code bit collections of the first 8 CCEs and the second 8 CCEs constituting the fourth PDCCH candidate are different, if the starting position of the code bit collection of the first 8 CCs is 0 and the starting position of the code bit collection of the second 8 CCEs is 8, the second UE can only detect the first 8 CCEs and cannot detect the second 8 CCEs after receiving the fourth PDCCH candidate, wherein the first 8 CCEs and the second 8 CCEs can be understood as the aggregation level of the 8 PDCCH candidates.
In another implementation, the network device sends one first PDCCH candidate to the UE on a broadcast dedicated carrier.
Specifically, the network device sends at least one first PDCCH candidate in a PDCCH candidate set to the UE on the broadcast dedicated carrier, where the first PDCCH candidate is composed of n×l control channel elements CCEs, where starting positions of code bit collection of a front (N/2) ×l CCE and a rear (N/2) ×l CCE are the same, L is an integer greater than or equal to 8, and N is an even number greater than 0.
Optionally, the first PDCCH candidate consists of two second PDCCH candidates, or the first PDCCH candidate consists of one second PDCCH candidate and (at least) one third PDCCH candidate, which is different from the scrambling and/or interleaving of the second PDCCH candidates.
The process of scrambling or interleaving by the network device to generate the third PDCCH candidate, implementing the PDCCH detection, and the process of descrambling or deinterleaving the third PDCCH candidate by the first UE may refer to the following fourth embodiment and fifth embodiment.
In this application, two second PDCCH candidates are used for illustration, and when a first PDCCH candidate is composed of a second PDCCH candidate and a third PDCCH candidate, the detection process is similar to that of the two second PDCCH candidates, and will not be described here.
For a first UE, the first UE detects one first PDCCH candidate received.
For the second UE, the second UE cannot detect the first PDCCH candidate due to the second UE's limited capabilities.
The PDCCH candidate set includes at least one second PDCCH candidate. The number of second PDCCH candidates included in the PDCCH candidate set may be referred to in table 1 above, as in the common search space, two second PDCCH candidates are corresponding to UEs with an aggregation level of 8. Specifically, the aggregation level of the second PDCCH candidates is 8, and the number of second PDCCH candidates included in the PDCCH candidate set is 2.
Each first PDCCH candidate after merging consists of n×l CCEs, where L is an integer greater than or equal to 8, and optionally, L may be an aggregation capability level corresponding to the second PDCCH candidate before non-merging. For example, L is 8 and n is 2, the first PDCCH candidate consists of 2*8 CCEs, i.e., 16 CCEs, and the first PDCCH may be regarded as consisting of 2 second PDCCH candidates with an aggregation level of 8. For the case where N and L are other values, reference may be made to L for 8 and N for 2, which are not described in detail in the embodiment of the present application.
For example, as shown in fig. 4, for a first PDCCH candidate with an aggregation level of 16, CCE indexes of two second PDCCH candidates with an aggregation level of 8 are 0 to 7 and 8 to 15, respectively, and then CCE indexes from 0 to 7 constitute first coded bits, CCE indexes from 8 to 15 constitute second coded bits, and the two second PDCCH candidates are composed as one first PDCCH candidate with an aggregation level of 16, and CCE logical numbers from 0 to 15 constitute coded bits of the first PDCCH candidate.
As shown in fig. 5, for the first PDCCH candidate with an aggregation level of 16, CCE indexes of the second PDCCH candidate with an aggregation level of 8 are 0 to 7 and 8 to 15, respectively, and CCE indexes from 0 to 7 constitute first coded bits, CCE indexes from 8 to 15 constitute second coded bits, and the two second PDCCH candidates are composed as one first PDCCH candidate.
The starting positions of the code bit collection of the first (N/2) and the last (N/2) L CCEs respectively constituting the first PDCCH candidate are the same, L is an integer greater than or equal to 8, and N is an even number greater than 0.
The starting position of the coded bit collection of the CCE is that the ratio carried on the CCE is thatSpecially collected sequence e k A bit of the sequence w before the bit collection corresponding to the first bit or a bit index of the sequence w before the bit collection.
For example, as shown in fig. 4, L is 8, N is 2, the aggregation level of the first PDCCH candidate is 16, the first (N/2) L CCEs, i.e., the first 8 CCEs, CCE indexes 0 to 7, the first bit after the collection of coded bits for CCE index 0 is e 0 The first bit after the code bit collection is e 0 The bit before the corresponding code bit collection is w 0 The starting position of the code bit collection for the first 8 CCEs is the starting position of the code bit collection on CCE index 0, w 0 Or 0. Rear (N/2) L CCEs, i.e. rear 8 CCEs, CCE index 8 to 15, the first bit after collection of coded bits for CCE index 8 being e 0 The first bit after the code bit collection is e 0 The bit before the corresponding code bit collection is w 0 The starting position of the code bit collection for the last 8 CCEs is then the starting position of the code bit collection on CCE index 0, which is w 0 Or 0.
In short, the starting positions of the code bit collections of the first (N/2) L CCEs and the last (N/2) L CCEs that constitute the first PDCCH candidate are the same, which refers to the first bit in the sequence after the code bit collection corresponding to the first CCE in the first (N/2) L CCEs, the bit in the sequence before the corresponding code bit collection or the bit index in the sequence before the corresponding code bit collection is the same as the first bit in the sequence after the code bit collection corresponding to the first CCE in the last (N/2) L CCEs, and the bit index in the sequence before the corresponding code bit collection or the bit index in the sequence before the corresponding code bit collection is at least one.
Optionally, the first PDCCH candidate is composed of n×l consecutive CCEs starting from a first starting CCE, where the first starting CCE is CCE index 0. Also taking fig. 4 as an example, CCE indexes of two candidate PDCCHs are consecutive and 0 to 7 and 8 to 15, respectively.
Alternatively, the first PDCCH candidate is in the common search space, which may also be said to belong to the common search space. That is, the first UE listens for the first PDCCH candidate in the common search space.
Optionally, DCI information and/or redundancy information carried in each second PDCCH candidate is the same.
For example, the first UE determining to detect the first PDCCH candidate may determine to detect at least one PDCCH candidate when it is determined that one or more of the following conditions are met:
if the first UE receives an indication of detecting the first PDCCH candidates sent by the network equipment, the first UE detects at least one first PDCCH candidate in the PDCCH candidate set; or alternatively
And if the first UE supports the detection of the first PDCCH candidates, the first UE detects at least one first PDCCH candidate in the PDCCH candidate set.
In one implementation, the network device may send an indication to the first UE to detect the first PDCCH candidate, and the first UE may receive the indication sent by the network device to detect the first PDCCH candidate.
Optionally, the indication of detecting the first PDCCH candidate is indicated by an MBMS primary information block carried by the PBCH. For example, the MBMS master information block includes one of a master information block (master information block, MIB), MIB-MBMS, SIB1, SI. For example, the indication of detecting the first PDCCH candidate is at least one piece of information in an MBMS main information block carried by the PBCH, that is, at least one piece of information in an MBMS main information block carried by the PBCH is used to indicate the (first) UE to detect the first PDCCH candidate.
Taking an example that the network device sends an indication of detecting the first PDCCH candidate, if the first UE receives the indication of detecting the first PDCCH candidate sent by the network device, the first UE combines and receives the two received second PDCCH candidates with the aggregation level of 8, so as to improve the success rate of blind detection, and if the first UE does not receive the indication of detecting the first PDCCH candidate sent by the network device, the first UE performs blind detection on the two received second PDCCH candidates with the aggregation level of 8 respectively, and does not perform differential combination.
For example, the network device indicates in the MBMS master information block by at least one information, e.g. by 3 bits, where 3 bits respectively indicate whether the first UE supports aggregation level 4/8/16, e.g. by 2 bits, and 2 bits respectively indicate whether the first UE supports aggregation level 4/8.
In yet another example, the network device indicates the bit status value in the MBMS master information block through at least one information, and has a correspondence with the aggregation level used by the PDCCH in advance. For example, as shown in Table 5, bit state values 00/01/10 correspond to PDCCH aggregation levels 4/8/16, respectively, and bit state value 11 does not have a corresponding PDCCH aggregation level.
TABLE 5
Bit field Message
00 4
01 8
10 16
11 Spare
Optionally, the PDCCH aggregation level corresponding to the bit status value may indicate that the aggregation level supported by the first UE is one or more of 4/8/16.
That is, the bit state value is the only aggregation level supported by the first UE, for example, the bit state value is 01, the corresponding aggregation level is 8, and the first UE can only use the aggregation level 8 to detect the first PDCCH candidate.
Optionally, the PDCCH aggregation level corresponding to the bit state value may be a minimum aggregation level supported by the first UE. For example, the bit state value is 01, the corresponding aggregation level is 8, and the first UE can detect the first PDCCH candidate using aggregation levels 8 and 16.
Alternatively, it may be the maximum aggregation level supported by the first UE. For example, the bit state value is 01, the corresponding aggregation level is 8, and the first UE can detect the first PDCCH candidate using aggregation levels 4 and 8.
And for the second UE, the second UE does not support receiving the MBMS main information block to acquire the aggregation level supported by the PDCCH, and the second UE cannot acquire the information of the aggregation level in the MBMS main information block or acquire the bit value which is null in the MBMS main information block.
In another possible implementation, the first UE determines that the first PDCCH candidate is pre-agreed upon, and then determines to support detection of the first PDCCH candidate, where the first UE pre-agrees with a network device (e.g., base station).
Taking the first PDCCH candidate pre-agreed by the first UE as an example, if the first UE determines that the first UE is the UE receiving the MBMS service, the first UE performs combined reception on the two second PDCCH candidates with aggregation level 8 detected in the common search space.
In yet another possible implementation, the first UE determines to support detection of the first PDCCH candidate according to its own first capability, which may be referred to in step 301.
In summary, the first UE may use the plurality of second PDCCH candidates as a first PDCCH candidate with a higher aggregation level, thereby improving the success rate of PDCCH blind detection, and the second UE may directly perform blind detection on the received second PDCCH candidates.
Example two
In addition, in the prior art, the UE may determine the control format indication CFI by receiving the higher layer parameter, and may not obtain the CFI by FCFICH, specifically if the UE is configured with the higher layer parameter semi static CFI-slotsublotnonmsbsfn or semi static CFI-subframe nonmsbsfn, and for the non-MBSFN subframe, the CFI value is equal to the higher layer parameter. If the UE is configured with a higher layer parameter semi-static CFI-SlotSubslotMBSFN or semi-static CFI-subframe MBSFN, the CFI value is equal to the higher layer parameter for MBSFN subframes. But higher layer signaling for indicating CFI can be received only when the UE is in a CONNECTED (rrc_connected) state. And the UE on the MBMS dedicated cell is in an IDLE (rrc_idle) state, and cannot configure the CFI through the above-mentioned higher layer signaling.
In view of this, the embodiment of the present application also provides a method for configuring CFI, where the success rate of PDCCH blind detection is indirectly improved by statically configuring CFI. Optionally, the configuration method of the CFI can be combined with the PDCCH detection method, so that the success rate of PDCCH blind detection is further improved.
For example, the CFI configuration method is only applied to a new UE, i.e., the first UE in the PDCCH detection method of the first embodiment.
The UE determines a CFI for indicating a number of symbols occupied by PDCCH transmission in one subframe, the CFI being determined by at least one of:
the UE determines the CFI according to the received third information;
the UE determines the CFI according to a predefined;
the UE determines the CFI according to the first corresponding relation and fourth information;
wherein the third information and/or the fourth information is information carried in a physical broadcast channel PBCH;
and the UE detects downlink control information PDCCH according to the CFI.
The third information and/or the fourth information is illustratively carried in the MBMS master information block. For example, the MBMS master information block includes one of a master information block (master information block, MIB), MIB-MBMS, SIB1, SI.
Correspondingly, the network device may send the third information and/or the fourth information to the UE.
For example, the network device may send the third information and/or the fourth bearer to the UE in an MBMS master information block.
In one implementation, the third information indicates the value of the CFI by 1 bit or 2 bits.
The range of values of the CFI indicated by the third information through the 1-bit may be one, two, three or four, that is, the value of the CFI to be indicated is selected from one value, or the value of the CFI to be indicated is selected from two values, or the value of the CFI to be indicated is selected from three values, or the value of the CFI to be indicated is selected from four values. For example, when the range of the indicated CFI values is one, the value of the indicated CFI is selected in 1, or the value of the indicated CFI is selected in 2, or the value of the indicated CFI is selected in 3, or the range of the indicated CFI values is selected in 4, or the like, when the range of the indicated CFI values is two, the value of the indicated CFI is selected in 1 and 2, or the value of the indicated CFI is selected in 1 and 3, or the value of the indicated CFI is selected in 2 and 3, when the range of the indicated CFI values is three, the value of the indicated CFI is selected in 1,2 and 3, or the value of the indicated CFI is selected in 2,3 and 4, or the value of the indicated CFI is selected in 1,2 and 4, and when the range of the indicated CFI values is four, the value of the indicated CFI is selected in 1,2,3 and 4.
By way of example, the third information indicates the value of the CFI by 1 bit, including one of the following:
1, a step of; or alternatively
2; or alternatively
3, a step of; or alternatively
4, a step of; or alternatively
1 and 2; or alternatively
1 and 3; or alternatively
2 and 3; or alternatively
1,2 and 3; or alternatively
2,3 and 4; or alternatively
1,2 and 4; or alternatively
1,3 and 4; or alternatively
1,2,3 and 4.
Alternatively, when the value of the 1 bit is 0, the indicated CFI has a value of 1 or 2 or 3 or 4. For example, a value of 1 bit is 0, a value of CFI indicated is 1, and a value of 1 bit is 1, no value is indicated.
Alternatively, when the 1-bit value is {0,1}, the 2 CFI values respectively corresponding thereto may be one of {1,2}, {1,3}, {1,4}, {2,3}, {2,4}, and {3,4 }. For example, 1 bit {0,1} corresponds one-to-one to the CFI value {1,2}, i.e., a bit of 0 for this information indicates a CFI of 1 and a bit of 1 indicates a CFI of 2.
Alternatively, when the 1-bit value includes {0,1}, the value 0 indicates that the CFI value is not indicated using the third information, and the value 1 may indicate that the corresponding CFI value is 1, or 2, or 3, or 4.
Alternatively, when the 1-bit value includes {0,1}, the value 1 indicates that the CFI value is not indicated using the third information, and the value 0 may indicate that the corresponding CFI value is 1, or 2, or 3, or 4.
The range of values of the CFI indicated by the third information through the 2-bit may be one, two, three or four, that is, the value of the CFI to be indicated is selected from one value, or the value of the CFI to be indicated is selected from two values, or the value of the CFI to be indicated is selected from three values, or the value of the CFI to be indicated is selected from four values. For example, when the range of the indicated CFI values is one, the value of the indicated CFI is selected in 1, or the value of the indicated CFI is selected in 2, or the value of the indicated CFI is selected in 3, or the range of the indicated CFI values is selected in 4, or the like, when the range of the indicated CFI values is two, the value of the indicated CFI is selected in 1 and 2, or the value of the indicated CFI is selected in 1 and 3, or the value of the indicated CFI is selected in 2 and 3, when the range of the indicated CFI values is three, the value of the indicated CFI is selected in 1,2 and 3, or the value of the indicated CFI is selected in 2,3 and 4, or the value of the indicated CFI is selected in 1,2 and 4, and when the range of the indicated CFI values is four, the value of the indicated CFI is selected in 1,2,3 and 4.
As yet another example, the third information indicates the value of the CFI by 2 bits, including one of:
1, a step of; or alternatively
2; or alternatively
3, a step of; or alternatively
4, a step of; or alternatively
1 and 2; or alternatively
1 and 3; or alternatively
2 and 3; or alternatively
1,2 and 3; or alternatively
2,3 and 4; or alternatively
1,2 and 4; or alternatively
1,3 and 4; or alternatively
1,2,3 and 4.
As another example, the third information indicates the value of the CFI by 2 bits, including one of the following:
1 and 2; or alternatively
1 and 3; or alternatively
1 and 4; or alternatively
2 and 3; or alternatively
2 and 4; or alternatively
3 and 4; or alternatively
1,2 and 3; or alternatively
2,3 and 4; or alternatively
1,2 and 4; or alternatively
1,3 and 4; or alternatively
1,2,3 and 4.
For example, a 2-bit value of {00, 01, 10, 11} may correspond one-to-one to a CFI value {1,2,3,4}, with bit 00 representing a CFI of 1, bit 01 representing a CFI of 2, bit 10 representing a CFI of 3, and bit 11 representing a CFI of 4. Or as another example, a 2-bit value of {00, 01, 10, 11}, a bit of 00 indicating a CFI of 1, a bit of 01 indicating a CFI of 2, a bit of 10 indicating a CFI of 3, and 11 indicating no value.
Alternatively, the 2-bit value is {00, 01, 10, 11}, where 00 indicates that the CFI value is not indicated using the third information, {01, 10, 11} may indicate the CFI value {1,2,3}, or {1,2,4}, or {1,3,4}, or {2,3,4}. For example, the 2-bit value is {00, 01, 10, 11}, where 00 indicates that the CFI value is indicated without using the third information, 01 indicates that the corresponding CFI value is 1, 10 indicates that the corresponding CFI value is 2, and 11 indicates that the corresponding CFI value is 3.
Alternatively, the 2-bit value is {00, 01, 10, 11}, where 11 indicates that the CFI value is not indicated using the third information, {00, 01, 10} may indicate the CFI value {1,2,3}, or {1,2,4}, or {1,3,4}, or {2,3,4}. For example, the 2-bit value is {00, 01, 10, 11}, where 11 indicates that the CFI value is indicated without using the third information, 00 indicates that the corresponding CFI value is 1, 01 indicates that the corresponding CFI value is 2, and 11 indicates that the corresponding CFI value is 3.
In this implementation manner, after determining the value of the CFI to be indicated for the UE, the network device determines the value of the 1 bit or the value of the 2 bit corresponding to the value of the CFI indicated for the UE, and carries the value of the 1 bit or the value of the 2 bit in the third information. The UE receives the third information, and can determine the value of the CFI corresponding to the value of the 1 bit or the value of the CFI corresponding to the value of the 2 bit through the value of the 1 bit or the value of the 2 bit carried in the third information, so that the UE determines the network equipment to be the value of the CFI indicated by the UE.
In another implementation, the UE determines the value of the CFI according to a predefined definition, the CFI value comprising one of 1,2,3, and 4.
In this implementation, the UE directly determines the value of the predefined CFI.
In yet another implementation manner, the UE determines the CFI according to a first correspondence and fourth information, where the fourth information is used to indicate a system bandwidth or a number of resource blocks RBs, and the first correspondence includes a correspondence between a value of the system bandwidth and a value of the CFI, or a correspondence between a number of RBs and a value of the CFI.
In this implementation manner, after determining the value of the CFI to be indicated for the UE, the network device determines, through a correspondence between the value of the system bandwidth and the value of the CFI included in the first correspondence, the value of the system bandwidth corresponding to the value of the CFI indicated for the UE, and carries the value of the system bandwidth in the fourth information. And the UE receives the fourth information, and determines the CFI value corresponding to the system bandwidth value in the first corresponding relation through the system bandwidth value carried in the fourth information and the first corresponding relation, so that the UE determines the CFI value indicated by the network equipment for the UE.
Or after determining the value of the CFI to be indicated for the UE, the network device determines, according to the correspondence between the value of the system broadband and the value of the CFI included in the first correspondence, the number of system RBs corresponding to the value of the CFI indicated for the UE, and carries the number of system RBs in the fourth information. And the UE receives the fourth information, and determines the value of the CFI corresponding to the number of the system RBs in the first corresponding relation through the number of the system RBs carried in the fourth information and the first corresponding relation, so that the UE determines the value of the CFI indicated by the network equipment for the UE.
The first correspondence may include a correspondence between a value of a system bandwidth and a value of a CFI, or a correspondence between a number of RBs and a value of a CFI, including:
the first correspondence includes a correspondence between a value of a system bandwidth and a value of a CFI, or a correspondence between a number of RBs and a value of a CFI, including:
when the number of the system bandwidths or the number of the RBs is smaller than a first number, the number of the CFIs is 3;
when the value of the system bandwidth or the number of RBs is greater than or equal to a first value and less than a second value, the value of the CFI is 2;
when the number of the system bandwidths or the number of the RBs is greater than or equal to a second value, the number of the CFIs is 1.
In another example, the first correspondence relationship includes a correspondence relationship between a value of a system bandwidth and a value of a CFI, or a correspondence relationship between a number of RBs and a value of a CFI, including:
when the number of the system bandwidths or the number of the RBs is smaller than or equal to a first number, the number of the CFIs is 3;
when the value of the system bandwidth or the number of RBs is greater than a first value and less than or equal to a second value, the value of the CFI is 2;
when the number of the system bandwidths or the number of the RBs is greater than a second value, the value of the CFI is 1.
In addition, the example, the first correspondence relationship includes a correspondence relationship between a value of a system bandwidth and a value of a CFI, or a correspondence relationship between a number of RBs and a value of a CFI, including:
when the number of the system bandwidths or the number of the RBs is smaller than a first value, the number of the CFIs is 4;
when the value of the system bandwidth or the number of RBs is greater than or equal to a first value and less than a second value, the value of the CFI is 3;
when the number of the system bandwidths or the number of the RBs is greater than or equal to a second value and smaller than a third value, the number of the CFIs is 2;
When the number of the system bandwidths or the number of the RBs is greater than or equal to a third value, the number of the CFIs is 1.
In another example, the first correspondence relationship includes a correspondence relationship between a value of a system bandwidth and a value of a CFI, or a correspondence relationship between a number of RBs and a value of a CFI, including:
when the number of the system bandwidths or the number of the RBs is smaller than or equal to a first number, the number of the CFIs is 4;
when the value of the system bandwidth or the number of RBs is greater than a first value and less than or equal to a second value, the value of the CFI is 3;
when the value of the system bandwidth or the number of RBs is greater than a second value and less than or equal to a third value, the value of the CFI is 2;
when the number of the system bandwidths or the number of the RBs is greater than a third value, the number of the CFIs is 1.
In addition, the example, the first correspondence relationship includes a correspondence relationship between a value of a system bandwidth and a value of a CFI, or a correspondence relationship between a number of RBs and a value of a CFI, including:
when the number of the system bandwidths or the number of the RBs is smaller than a first number, the number of the CFIs is 2; when the value of the system bandwidth or the value of the RB is greater than or equal to a second value, the value of the CFI is 1; or alternatively
When the number of the system bandwidths or the number of the RBs is smaller than a first number, the number of the CFIs is 3; when the value of the system bandwidth or the value of the RB is greater than or equal to a second value, the value of the CFI is 1; or alternatively
When the number of the system bandwidths or the number of the RBs is smaller than a first number, the number of the CFIs is 3; when the value of the system bandwidth or the value of the RB is greater than or equal to a second value, the value of the CFI is 2.
Alternatively, the first value may be the same as or different from the second value in this example.
In another example, the first correspondence relationship includes a correspondence relationship between a value of a system bandwidth and a value of a CFI, or a correspondence relationship between a number of RBs and a value of a CFI, including:
when the number of the system bandwidths or the number of the RBs is smaller than or equal to a first number, the number of the CFIs is 2; when the value of the system bandwidth or the value of the RB is greater than a second value, the value of the CFI is 1; or when the value of the system bandwidth or the number of RBs is less than or equal to a first value, the value of the CFI is 3; when the value of the system bandwidth or the value of the RB is greater than a second value, the value of the CFI is 1; or when the value of the system bandwidth or the number of RBs is less than or equal to a first value, the value of the CFI is 3; when the value of the system bandwidth or the value of the RB is greater than a second value, the value of the CFI is 2.
Alternatively, the first value may be the same as or different from the second value in this example.
The first and second values corresponding to the values of the system broadband may be {1.4,3}, {1.4,5}, {1.4, 10}, {1.4, 15}, {1.4, 20}, {3,5}, {3, 10}, {3, 15}, {3, 20}, {5, 10}, {5, 15}, {5, 20}, {10, 15}, {10, 20}, {15, 20}. The corresponding first, second and third values may be one of {1.4,3,5}, {1.43, 10}, {1.4,3, 15}, {1.4,3, 20}, {1.4,5, 10}, {1.4,5, 15}, {1.4,5, 20}, {1.4, 10, 15}, {1.4, 10, 20}, {1.4, 15, 20}, {3,5, 10}, {3,5, 15}, {3,5, 20}, {3, 10, 20}, {3, 15, 20}, {5, 10, 15}, {5, 10, 20}, {5, 15, 20}, 10, 15, 20}.
Alternatively, for the values of the system bandwidth, the corresponding first and second values may be one of {1.4,1.4}, {3,3}, {5,5}, {10, 10}, {15, 15}, {20, 20}.
For the number of RBs, the corresponding first and second values may be one of {6, 15}, {6, 25}, {6, 50}, {6, 75}, {6, 100}, {15, 25}, {15, 50}, {15, 75}, {15, 100}, {25, 50}, {25, 75}, {25, 100}, {50, 75}, {50, 100}, {75, 100}. The corresponding first, second and third values may be one of {6, 15, 25}, {6, 15, 50}, {6, 15, 75}, {6, 15, 100}, {6, 25, 50}, {6, 25, 75}, {6, 25, 100}, {6, 50, 75}, {6, 50, 100}, {6, 75, 100}, {15, 25, 50}, {15, 25, 75}, {15, 25, 100}, {15, 50, 75}, {15, 50, 100}, {15, 75, 100}, {25, 50, 75}, {25, 50, 100}, {25, 75, 100}.
Alternatively, for the number of RBs, the corresponding first and second values may be one of {6,6}, {15, 15}, {25, 25}, {50, 50}, {75, 75}, {100, 100}.
Specific first correspondence relationships are shown in tables 6 to 25 below, and tables 6 to 25 are described in order below.
The first correspondence in table 6 includes a correspondence between a value of a system bandwidth and a value of a CFI, where Channel bandwidth BW represents a value of the system bandwidth in megahertz (MHz), and the value of the CFI is represented by Number of OFDM symbols for PDCCH, that is, the number of OFDM symbols occupied by the PDCCH. When the specific system bandwidth is greater than or equal to X2, the corresponding CFI is 1, when the system bandwidth is less than X2 and the system bandwidth is greater than or equal to X1, the corresponding CFI is 2, and when the system bandwidth is less than X1, the corresponding CFI is 3.
TABLE 6
Channel bandwidth BW[MHz] Number of OFDM symbols for PDCCH
BW＞＝X2 1
X1＜＝BW＜X2 2
BW＜X1 3
The first correspondence in table 7 includes a correspondence between a value of a system bandwidth and a value of a CFI, where Channel bandwidth BW represents a value of the system bandwidth in megahertz (MHz), and the value of the CFI is represented by Number of OFDM symbols for PDCCH, that is, the number of OFDM symbols occupied by the PDCCH. When the specific system bandwidth is greater than X2, the corresponding CFI is 1, when the system bandwidth is less than or equal to X2 and the system bandwidth is greater than X1, the corresponding CFI is 2, and when the system bandwidth is less than or equal to X1, the corresponding CFI is 3.
TABLE 7
Channel bandwidth BW[MHz] Number of OFDM symbols for PDCCH
BW＞X2 1
X1＜BW＜＝X2 2
BW＜＝X1 3
The first correspondence in table 8 includes a correspondence between a value of a system bandwidth and a value of a CFI, where Channel bandwidth BW represents a value of the system bandwidth in megahertz (MHz), and the value of the CFI is represented by Number of OFDM symbols for PDCCH, that is, the number of OFDM symbols occupied by the PDCCH. When the specific system bandwidth is greater than or equal to X3, the corresponding CFI is 1, when the system bandwidth is less than X3 and the system bandwidth is greater than or equal to X2, the corresponding CFI is 2, when the system bandwidth is less than X2 and the system bandwidth is greater than or equal to X1, the corresponding CFI is 3, and when the system bandwidth is less than X1, the corresponding CFI is 4.
TABLE 8
The first correspondence in table 9 includes a correspondence between a value of a system bandwidth and a value of a CFI, where Channel bandwidth BW represents a value of the system bandwidth in megahertz (MHz), and the value of the CFI is represented by Number of OFDM symbols for PDCCH, that is, the number of OFDM symbols occupied by the PDCCH. When the specific system bandwidth is greater than X3, the corresponding CFI is 1, when the system bandwidth is less than or equal to X3 and the system bandwidth is greater than X2, the corresponding CFI is 2, when the system bandwidth is less than or equal to X2 and the system bandwidth is greater than X1, the corresponding CFI is 3, and when the system bandwidth is less than or equal to X1, the corresponding CFI is 4.
TABLE 9
Channel bandwidth BW[MHz] Number of OFDM symbols for PDCCH
BW＞X3 1
X2＜BW＜＝X3 2
X1＜BW＜＝X2 3
BW＜＝X1 4
The first correspondence in Table 10 includes the number of RBsCorrespondence with the value of CFI, transmission bandwidth configuration N RB The number of RBs, i.e. the number of RBs of the transmission bandwidth configuration, and the number of CFIs is indicated by Number of OFDM symbols for PDCCH, i.e. the number of OFDM symbols occupied by the PDCCH. When the number of RBs is greater than or equal to X2, the corresponding CFI value is 1, when the number of RBs is less than X2 and the number of RBs is greater than or equal to X1, the corresponding CFI value is 2, and when the number of RBs is less than X1, the corresponding CFI value is 3.
Table 10
Transmission bandwidth configuration N RB Number of OFDM symbols for PDCCH
N RB ＞＝X2 1
X1＜＝N RB ＜X2 2
N RB ＜X1 3
The first correspondence in Table 11 includes a correspondence of the number of RBs to the value of CFI, transmission bandwidth configuration N RB The number of RBs, i.e. the number of RBs of the transmission bandwidth configuration, and the number of CFIs is indicated by Number of OFDM symbols for PDCCH, i.e. the number of OFDM symbols occupied by the PDCCH. When the number of specific RBs is greater than X2, the corresponding CFI has a value of 1, when the number of RBs is less than or equal to X2 and the number of RBs is greater than X1, the corresponding CFI has a value of 2, the number of RBsAnd when the CFI value is less than or equal to X1, the corresponding CFI value is 3.
TABLE 11
Transmission bandwidth configuration N RB Number of OFDM symbols for PDCCH
N RB ＞X2 1
X1＜N RB ＜＝X2 2
N RB ＜＝X1 3
The first correspondence in Table 12 includes a correspondence of the number of RBs to the value of CFI, transmission bandwidth configuration N RB The number of RBs, i.e. the number of RBs of the transmission bandwidth configuration, and the number of CFIs is indicated by Number of OFDM symbols for PDCCH, i.e. the number of OFDM symbols occupied by the PDCCH. When the number of RBs is greater than or equal to X3, the corresponding CFI is 1, when the number of RBs is less than X3 and the number of RBs is greater than or equal to X2, the corresponding CFI is 2, when the number of RBs is less than X2 and the number of RBs is greater than or equal to X1, the corresponding CFI is 3, and when the number of RBs is less than X1, the corresponding CFI is 4.
Table 12
Transmission bandwidth configuration N RB Number of OFDM symbols for PDCCH
N RB ＞＝X3 1
X2＜＝N RB ＜X3 2
X1＜＝N RB ＜X2 3
N RB ＜X1 4
The first correspondence in Table 13 includes a correspondence of the number of RBs to the value of CFI, transmission bandwidth configuration N RB The number of RBs, i.e. the number of RBs of the transmission bandwidth configuration, and the number of CFIs is indicated by Number of OFDM symbols for PDCCH, i.e. the number of OFDM symbols occupied by the PDCCH. When the number of specific RBs is greater than X3, the corresponding CFI is 1, when the number of RBs is less than or equal to X3 and the number of RBs is greater than X2, the corresponding CFI is 2, when the number of RBs is less than or equal to X2 and the number of RBs is greater than X1, the corresponding CFI is 3, and when the number of RBs is less than or equal to X1, the corresponding CFI is 4.
TABLE 13
Transmission bandwidth configuration N RB Number of OFDM symbols for PDCCH
N RB ＞X3 1
X2＜N RB ＜＝X3 2
X1＜N RB ＜＝X2 3
N RB ＜＝X1 4
The first correspondence in table 14 includes a correspondence between a value of a system bandwidth and a value of a CFI, where Channel bandwidth BW represents a value of the system bandwidth in megahertz (MHz), and the value of the CFI is represented by Number of OFDM symbols for PDCCH, that is, a number of OFDM symbols occupied by the PDCCH. When the specific system bandwidth is greater than or equal to X2, the corresponding CFI is 1, and when the system bandwidth is less than X1, the corresponding CFI is 2. Alternatively, X1 is the same as X2.
TABLE 14
Channel bandwidth BW[MHz] Number of OFDM symbols for PDCCH
BW＞＝X2 1
BW＜X1 2
The first correspondence in table 15 includes a correspondence between a value of a system bandwidth and a value of a CFI, where Channel bandwidth BW represents a value of the system bandwidth in megahertz (MHz), and the value of the CFI is represented by Number of OFDM symbols for PDCCH, that is, a number of OFDM symbols occupied by the PDCCH. When the specific system bandwidth is greater than X2, the corresponding CFI is 1, and when the system bandwidth is less than or equal to X1, the corresponding CFI is 2. Alternatively, X1 is the same as X2.
TABLE 15
The first correspondence in table 16 includes a correspondence between a value of a system bandwidth and a value of a CFI, where Channel bandwidth BW represents a value of the system bandwidth in megahertz (MHz), and the value of the CFI is represented by Number of OFDM symbols for PDCCH, that is, a number of OFDM symbols occupied by the PDCCH. When the specific system bandwidth is greater than or equal to X2, the corresponding CFI is 1, and when the system bandwidth is less than X1, the corresponding CFI is 3. Alternatively, X1 is the same as X2.
Table 16
Channel bandwidth BW[MHz] Number of OFDM symbolsfor PDCCH
BW＞＝X2 1
BW＜X1 3
The first correspondence in table 17 includes a correspondence between a value of a system bandwidth and a value of a CFI, where Channel bandwidth BW represents a value of the system bandwidth in megahertz (MHz), and the value of the CFI is represented by Number of OFDM symbols for PDCCH, that is, the number of OFDM symbols occupied by the PDCCH. When the specific system bandwidth is greater than X2, the corresponding CFI is 1, and when the system bandwidth is less than or equal to X1, the corresponding CFI is 3. Alternatively, X1 is the same as X2.
TABLE 17
Channcl bandwidth BW[MHz] Numbcr of OFDM symbols for PDCCH
BW＞X2 1
BW＜＝X1 3
The first correspondence in table 18 includes a correspondence between a value of a system bandwidth and a value of a CFI, where Channel bandwidth BW represents a value of the system bandwidth in megahertz (MHz), and the value of the CFI is represented by Number of OFDM symbols for PDCCH, that is, the number of OFDM symbols occupied by the PDCCH. When the specific system bandwidth is greater than or equal to X2, the corresponding CFI is 2, and when the system bandwidth is less than X1, the corresponding CFI is 3. Alternatively, X1 is the same as X2.
TABLE 18
Channel bandwidth BW[MHz] Number of OFDM symbols for PDCCH
BW＞＝X2 2
BW＜X1 3
The first correspondence in table 19 includes a correspondence between a value of a system bandwidth and a value of a CFI, where Channel bandwidth BW represents a value of the system bandwidth in megahertz (MHz), and the value of the CFI is represented by Number of OFDM symbols for PDCCH, that is, the number of OFDM symbols occupied by the PDCCH. When the specific system bandwidth is greater than X2, the corresponding CFI is 2, and when the system bandwidth is less than or equal to X1, the corresponding CFI is 3. Alternatively, X1 is the same as X2.
TABLE 19
Channel bandwidth BW[MHz] Number of OFDM symbols for PDCCH
BW＞X2 2
BW＜＝X1 3
The first correspondence in Table 20 includes a correspondence of the number of RBs to the value of CFI, transmission bandwidth configuration N RB The number of RBs, i.e. the number of RBs of the transmission bandwidth configuration, and the number of CFIs is indicated by Number of OFDM symbols for PDCCH, i.e. the number of OFDM symbols occupied by the PDCCH. When the number of RBs is greater than or equal to X2, the corresponding CFI value is 1, and when the number of RBs is less than X1, the corresponding CFI value is 2. Alternatively, X1 is the same as X2.
Table 20
Transmission bandwidth configuration N RB Number of OFDM symbols for PDCCH
N RB ＞＝X2 1
N RB ＜X1 2
The first correspondence in Table 21 includes correspondence of the number of RBs to the value of CFI, transmission bandwidth configuration N RB Representing the number of RBs, i.e. the number of RBs of the transmission bandwidth configurationThe value of CFI is indicated by Number of OFDM symbols for PDCCH, i.e. the number of OFDM symbols occupied by the PDCCH. When the number of the specific RBs is greater than or equal to X2, the corresponding CFI value is 1, and when the number of the RBs is less than or equal to X1, the corresponding CFI value is 2. Alternatively, X1 is the same as X2.
Table 21
Transmission bandwidth configuration N RB Number of OFDM symbols for PDCCH
N RB ＞X2 1
N RB ＜＝X1 2
The first correspondence in Table 22 includes a correspondence of the number of RBs to the value of CFI, transmission bandwidth configuration N RB The number of RBs, i.e. the number of RBs of the transmission bandwidth configuration, and the number of CFIs is indicated by Number of OFDM symbols for PDCCH, i.e. the number of OFDM symbols occupied by the PDCCH. When the number of RBs is greater than or equal to X2, the corresponding CFI value is 1, and when the number of RBs is less than X1, the corresponding CFI value is 3. Alternatively, X1 is the same as X2.
Table 22
Transmission bandwidth configuration N RB Number of OFDM symbols for PDCCH
N RB ＞＝X2 1
N RB ＜X1 3
The first correspondence in Table 23 includes correspondence of the number of RBs to the value of CFI, transmission bandwidth configuration N RB The number of RBs, i.e. the number of RBs of the transmission bandwidth configuration, and the number of CFIs is indicated by Number of OFDM symbols for PDCCH, i.e. the number of OFDM symbols occupied by the PDCCH. When the number of specific RBs is greater than X2, the corresponding CFI value is 1, and when the number of RBs is less than or equal to X1, the corresponding CFI value is 3. Alternatively, X1 is the same as X2.
Table 23
Transmission bandwidth configuration N RB Number of OFDM symbols for PDCCH
N RB ＞X2 1
N RB ＜＝X1 3
First correspondence package in Table 24Includes the correspondence between the number of RBs and the value of CFI, transmission bandwidth configuration N RB The number of RBs, i.e. the number of RBs of the transmission bandwidth configuration, and the number of CFIs is indicated by Number of OFDM symbols for PDCCH, i.e. the number of OFDM symbols occupied by the PDCCH. When the number of RBs is greater than or equal to X2, the corresponding CFI value is 2, and when the number of RBs is less than X1, the corresponding CFI value is 3. Alternatively, X1 is the same as X2.
Table 24
Transmission bandwidth configuration N RB Number of OFDM symbols for PDCCH
N RB ＞＝X2 2
N RB ＜X1 3
The first correspondence in Table 25 includes a correspondence of the number of RBs to the value of CFI, transmission bandwidth configuration N RB The number of RBs, i.e. the number of RBs of the transmission bandwidth configuration, and the number of CFIs is indicated by Number of OFDM symbols for PDCCH, i.e. the number of OFDM symbols occupied by the PDCCH. When the number of specific RBs is greater than X2, the corresponding CFI value is 2, and when the number of RBs is less than or equal to X1, the corresponding CFI value is 3. Alternatively, X1 is the same as X2.
Table 25
Transmission bandwidth configuration N RB Number of OFDM symbols for PDCCH
N RB ＞X2 2
N RB ＜＝X1 3
The UE determines the CFI value by receiving the CFI indication information in the MIB or by the corresponding relation between the agreed CFI and the bandwidth (or the RB number), and does not need to detect PCFICH to determine the CFI, so that the blind detection success rate of the PDCCH is finally improved.
In another implementation manner, the UE determines the CFI according to fifth information, and a first correspondence and fourth information, where the fourth information is used to indicate a system bandwidth or a number of resource blocks RBs, and the first correspondence includes a correspondence between a value of the system bandwidth and a value of the CFI, or a correspondence between a number of RBs and a value of the CFI.
For example, the fifth information may include 1 bit, 0 indicating that the value of the CFI is not determined using the first correspondence and the fourth information, and 1 indicating that the value of the CFI is determined using the first correspondence and the fourth information.
For example, the fifth information may include 1 bit, 1 indicating that the value of the CFI is not determined using the first correspondence and the fourth information, and 0 indicating that the value of the CFI is determined using the first correspondence and the fourth information.
If the UE determines the value of the CFI according to the fifth information by using the first correspondence and the fourth information, the process of determining the value of the CFI by the UE according to the first correspondence and the fourth information may refer to the above process, which is not described herein.
In another implementation, the UE determines the value of the CFI according to the sixth information and a predefined, the CFI value including one of 1,2,3, and 4.
Illustratively, the sixth information includes 1 bit, 0 indicating that the value of the predefined CFI is not used, 1 indicating that the CFI value is one of 1,2,3, and 4, i.e., the value 1 may indicate that the corresponding CFI value is 1, or 2, or 3, or 4.
Illustratively, the sixth information includes 1 bit, 1 indicating that the value of the predefined CFI is not used, 0 indicating that the CFI value is one of 1,2,3, and 4, i.e., the value 0 may indicate that the corresponding CFI value is 1, or 2, or 3, or 4.
In summary, through static configuration of the CFI in the method, the UE may determine the CFI without or through detecting the PCFICH, and the UE may determine the value of the CFI in the connected state or the idle state, thereby improving the success rate of PDCCH blind detection.
Example III
The embodiment of the present application also provides a method for configuring CFI and detecting PDCCH, and more specifically, it may be understood that, based on the method for configuring CFI provided in the second embodiment, the method for detecting PDCCH provided in the first embodiment is combined to implement PDCCH detection, so as to further improve PDCCH blind detection success rate.
For example, the UE referred to in the embodiments of the present application mainly refers to a new UE, i.e., the first UE in the PDCCH detection method described above.
Specifically, in this embodiment, by statically configuring the CFI, the UE does not need to detect the PCFICH to determine the CFI, the UE can determine the value of the CFI no matter what state, the blind detection success rate of the PDCCH has been improved, and the UE detects at least one first PDCCH in the PDCCH candidate set on the broadcast dedicated carrier through the determined value of the CFI, and when the aggregation level of the PDCCH transmitted by the network device is greater than or equal to the aggregation level supported by the first UE, the first UE can detect the PDCCH through combining CCEs, thereby further improving the success rate of PDCCH detection.
The following describes the specific procedure of the third embodiment of the present application in detail, first, refer to the configuration of CFI and the detection procedure of PDCCH shown in fig. 6, where the procedure includes:
step 601: the first UE accesses a broadcast dedicated carrier.
For example, the first UE may receive a signal sent by the network device for access by the UE, and access a broadcast dedicated carrier.
It should be noted that, the execution of step 601 may refer to the specific descriptions of step 301 and step 302 in fig. 3, which are not repeated here.
Step 602: the first UE determines a CFI.
It should be noted that, the execution of step 602 may be referred to the specific description in the second embodiment, and is not repeated here.
Step 603: the network device sends at least one first PDCCH candidate in a PDCCH candidate set to the first UE on the broadcast special carrier, wherein the first PDCCH candidate is composed of N.L CCEs, the starting positions of the code bit collection of the front (N/2) L CCEs and the rear (N/2) L CCEs respectively composing the first PDCCH candidate are the same, L is an integer greater than or equal to 8, and N is an even number greater than 0.
For example, instead of (at least) two separate second PDCCHs, the network device transmits (at least one) first PDCCH consisting of (at least) two second PDCCH candidates in this step 603.
It should be noted that, the execution of step 603 may be referred to the detailed description of step 303 in fig. 3, which is not repeated here.
Step 604: the first UE detects at least one first PDCCH candidate in a set of PDCCH candidates on the broadcast dedicated carrier.
It should be noted that, the execution of step 604 may be referred to the detailed description of step 303 in fig. 3, which is not repeated here.
It will be appreciated that fig. 6 is only an example of the combination of the first and second embodiments, and is not limited to the other combination of the first and second embodiments, but is configured to improve the success rate of PDCCH detection.
In LTE broadcasting, in order to enhance the reliability of PDCCH, it is proposed that DCI may be repeatedly transmitted in the same subframe, but there may be an old UE (i.e., a second UE) accessing a new eNB, so that the old UE may receive two identical DCIs, and there is a problem of ambiguity of processing, which causes the old UE to fail to process correctly. Therefore, in the embodiment of the present application, by making the old UE incapable of interpreting the repeatedly transmitted PDCCH when the PDCCH is repeatedly transmitted, the occurrence of the problem of processing ambiguity is avoided, and specifically, see the following fourth embodiment and fifth embodiment.
Example IV
The specific process of PDCCH detection will be described in detail in the following embodiments, first with reference to the PDCCH detection process shown in fig. 7, which includes:
step 701: the first UE accesses a broadcast dedicated carrier.
For example, the first UE may receive a signal sent by the network device for access by the UE, and access a broadcast dedicated carrier.
It should be noted that, the execution of step 701 may be referred to the specific descriptions of step 301 and step 302 in fig. 3, which are not repeated here.
Step 702: the network device adds a scrambling sequence to the coding bits corresponding to at least one third PDCCH candidate, wherein the third PDCCH candidate consists of (N/2) L CCEs, L is an integer greater than or equal to 8, N is an even number greater than 0, and the initialization parameters of a generator of the scrambling sequence are as follows The value of x may be {1,2, 3., 9 -2，2 9 -1，2 9 one of the }, or +.> The value of x may be {1,2, 3., 9 -2，2 9 -1，2 9 one of the values of y may be {1,2,3, }, 2 9 -2，2 9 -1，2 9 One of the }.
The scrambled sequence may be expressed asWherein->Is a bit sequence after scrambling, b (i) is a bit sequence before scrambling, c (i) is a scrambling sequence, where c (i) is generated from a generator of the scrambling sequence from an initialization parameter cinit.
The code bit corresponding to at least one third PDCCH candidate is a bit sequence before scrambling, which may also be understood as a bit sequence for generating the third PDCCH candidate.
For example, the network device adds a scrambling sequence to the coded bits corresponding to the at least one third PDCCH candidate before modulation, for example, before QPSK modulation, and the network device accesses the scrambling sequence to the coded bits corresponding to the at least one third PDCCH candidate to obtain a scrambled bit sequence, where the scrambled bit sequence may be used to generate the third PDCCH candidate.
Step 703: the network device sends at least one first PDCCH candidate in a PDCCH candidate set to the first UE on the broadcast special carrier, wherein the first PDCCH candidate is composed of N.L CCEs, the starting positions of the code bit collection of the front (N/2) L CCEs and the rear (N/2) L CCEs respectively composing the first PDCCH candidate are the same, L is an integer greater than or equal to 8, and N is an even number greater than 0.
For example, in this step 703, the network device sends (at least one) first PDCCH consisting of (at least) one second PDCCH candidate and at least one said third PDCCH candidate, where the second PDCCH candidate consists of (N/2) ×l CCEs, L is an integer greater than or equal to 8, and N is an even number greater than 0.
The code bits corresponding to the at least one third PDCCH candidate that added to the scrambling sequence prior to modulation (i.e., the bit sequence prior to scrambling) may be predefined by the network device and the first UE.
For example, the network device and the first UE predefine that the first (N/2) x L CCEs used to form the first PDCCH candidate form the second PDCCH candidate, and the second (N/2) x L CCEs form the third PDCCH candidate, or the network device and the first UE predefine that the first (N/2) x L CCEs used to form the first PDCCH candidate form the third PDCCH candidate, and the second (N/2) x L CCEs form the second PDCCH candidate.
Alternatively, the first UE may determine the at least one third PDCCH candidate for constituting the first PDCCH candidate by receiving a MIB message or SIB message or SI message transmitted by the network device.
For example, the first UE determines that the first (N/2) x L CCEs form the second PDCCH candidate by receiving the MIB message or SIB message or SI message sent by the network device, and the second (N/2) x L CCEs form the third PDCCH candidate, or the first UE determines that the first (N/2) x L CCEs form the third PDCCH candidate and the second (N/2) x L CCEs form the second PDCCH candidate by receiving the MIB message or SIB message or SI message sent by the network device.
Alternatively, the scrambling procedure for generating the third PDCCH candidate in this step 703 may be distinguished from the existing scrambling technique (e.g., the scrambling procedure for generating the second PDCCH candidate). For example, the process of generating the scrambling sequence in step 703 may be different from an existing process of generating the scrambling sequence (e.g., the initialization parameters cinit used in generating the third PDCCH candidate are different from the initialization parameters used in generating the second PDCCH candidate), and/or the process of adding the scrambling sequence to the encoded bits corresponding to at least one third PDCCH candidate may be different from an existing process of adding the scrambling sequence.
Step 704: the first UE descrambles at least one third PDCCH candidate coded bit.
Specifically, the initialization parameters of the scrambling code sequence generator areThe value of x may be {1,2, 3., 9 -2，2 9 -1，2 9 one of the }, or +.> The value of x may be {1,2, 3., 9 -2，2 9 -1，2 9 one of the values of y may be {1,2,3, }, 2 9 -2，2 9 -1，2 9 One of the }.
For example, the first UE may descramble the at least one third PDCCH candidate coded bit after demodulation, e.g., after QPSK modulation.
Alternatively, since the descrambling process is the inverse of the scrambling process, if the scrambling process in step 703 is different from the existing scrambling technique, the descrambling process in step 704 is also different from the existing descrambling process.
Step 705: the first UE detects at least one first PDCCH candidate in a set of PDCCH candidates on the broadcast dedicated carrier.
In this step 705, except that the first PDCCH candidate and the third PDCCH candidate are different from those in the step 303, the process of detecting the first PDCCH candidate by the first UE in this step 705 may refer to the step 303, and the similarities are not repeated herein, where in this step 705, the second PDCCH may be formed by first (N/2) x L CCEs, the third PDCCH candidate may be formed by second (N/2) x L CCEs, or the third PDCCH candidate may be formed by first (N/2) x L CCEs, and the second PDCCH may be formed by second (N/2) x L CCEs.
Alternatively, the order in which the first UE performs the step 704 and the step 705 is not limited, and the first UE may perform the step 704 first and then perform the step 705, or the first UE may perform the step 705 first and then perform the step 704.
Therefore, for the old UE, when the aggregation level of the PDCCH is greater than or equal to that of the old UE, the old UE cannot detect the PDCCH sent by the network device, that is, cannot read the PDCCH repeatedly sent, so that the problem of ambiguity handling is avoided, and for the first UE (i.e., the new UE), the first UE can detect the PDCCH sent by the network device.
Example five
The specific process of PDCCH detection will be described in detail in the following embodiments, first with reference to the PDCCH detection process shown in fig. 8, which includes:
step 801: the first UE accesses a broadcast dedicated carrier.
For example, the first UE may receive a signal sent by the network device for access by the UE, and access a broadcast dedicated carrier.
It should be noted that, the execution of step 801 may be referred to the specific descriptions of step 301 and step 302 in fig. 3, and is not repeated here.
Step 802: the network equipment interleaves the symbols corresponding to at least one third PDCCH candidate according to four symbols as a unit to obtain at least one third PDCCH candidate, wherein the third PDCCH candidate consists of (N/2) L CCEs, L is an integer greater than or equal to 8, and N is an even number greater than 0.
The symbol corresponding to at least one third PDCCH candidate may be understood as a symbol used to generate the third PDCCH candidate.
The symbols are illustratively in units of four symbols, which may be symbol quadruples (Symbol Quadruplet), mapped onto one resource element group REG (Resource Element Group).
Specifically, z is used (p) (i)＝<y (p) (4i)，y (p) (4i+1)，y (p) (4i+2)，y (p) (4i+3)>The symbol quadruple with the number i is represented, the antenna port number p, and the symbol quadruple block corresponding to the third PDCCH candidate is represented as z (p) (0)，...，z (p) (M quad -1) the interleaved symbol quad is denoted w (p) (o)，...，w (p) (M quad -1), wherein M quad ＝M symb /4，M symb Is the number of symbols, M, included in the third PDCCH candidate quad Is the number of symbol quadruples included in the third PDCCH candidate.
Specifically, a rank interleaver is used to interleave the symbol quadruple corresponding to the third PDCCH candidate, and the specific steps are as follows:
1)is the column number of the row-column interleaver matrix, and the columns of the matrix are respectively numbered +.>
2) Selecting to satisfy the formulaAnd the smallest integer +.>Determined as the number of rows of the matrix, where d=m quad The number of symbol quadruples corresponding to the third PDCCH candidate is that the rows of the matrix are numbered from top to bottom respectively
3) If it isThen->The filled virtual symbol quadruple is y k ＝<NULL>Where k=0, 1, ND-1, -/->Where k=0, 1, D-1, symbol quadruple sequence y k Write dimension of row by row +.>In the matrix of (2), and the four groups of the initial symbols of 0 rows and 0 columns are yo, the written matrix is:
4) Based on the patterns shown in Table 26 or Table 27Performing inter-column permutation on the above matrix, wherein P (j) is the number of the original column corresponding to the permuted column of number j, the inter-column permuted matrix->The method comprises the following steps:
5) The output of the interleaver is from the inter-column permutation matrix The first symbol quadruple sequence is read column by column, and the interleaved symbol quadruple is +.>Wherein->Corresponding to yP (o),>correspond to->And->Wherein K is П Is the number of elements in the interleaver matrix.
6) Removing symbol quadruple sequencesIn (a) and (b)<NULL>The element, interleaved symbol quadruple sequence is denoted as w (p) (0)，...，w (p) (M quad -1)。
The sequence of the interleaving step 5) and the interleaving step 6) is variable, which is not limited, and the network device may perform the step 5) before the step 6) or perform the step 6) before the step 5) by way of example.
Optionally, the network device permutes the matrix from the columns when performing interleaving step 5)When the primary symbol quadruple sequences are read row by row, the method skips<NULL>The element, the output symbol quadruple sequence is expressed as w (p) (0)，...，w (p) (M quad -1) and step 6) is not performed any more.
Tables 26 and 27 show the inter-column permutation patterns of the interleaver.
Number of columns in Table 26 is the number of the original column, usingInter-column permutation pattern is shown as the intra-column permutation mode,>respectively correspond to<1，17，9，25，5，21，13，29，3，19，11，27，7，23，15，31，0，16，8，24，4，20，12，28，2，18，10，26，6，22，14，30>When->When 32, the inter-column permutation pattern is P (31) =1, P (30) =17, P (29) = 9,P (28) =25, P (27) =5, P (26) =21, P (25) =13, P (24) =29, P (23) =3, P (22) =19, P (21) =11, P (20) =27, P (19) =7, P (18) =23, P (17) =15, P (16) =31, P (15) =0, P (14) =16, P (13) =8, P (12) =24, P (11) =4, P (10) =20, P (9) =12, P (8) =28, P (7) =2, P (6) =18, P (5) =10, P (4) =26, P (3) =6, P (2) =22 ，P(1)＝14，P(0)＝30。
Table 26
Number ofcolumns in Table 27 is the Number of the original column forInter-column permutation pattern is shown as an Inter-column permutation pattern satisfying +.>When (when)When 32, the intra-column permutation pattern is P (0) =30, P (1) =14, P (2) =22, P (3) =6, P (4) =26, P (5) =10, P (6) =18, P (7) =2, P (8) =28, P (9) =12, P (10) =20, P (11) =4, P (12) =24, P (13) =8, P (14) =16, P (15) =0, P (16) =31, P (17) =15, P (18) =23, P (19) =7, P (20) =27, P (21) =11, P (22) =19, P (23) =3, P (24) =29, P (25) =13, P (26) =21, P (27) =5, P (28) =25, P (29) = 9,P (30) =17, P (31) =1.
Table 27
In the formation of z (p) (0)，...，z (p) (M quad -1) at the time of interleaving, the symbol in the quadruple output by the interleaver<NULL>The element may be removed.
Wherein the symbol quadruple output by the interleaver may be used to generate a third PDCCH candidate.
For example, the network device interleaves symbols corresponding to the at least one third PDCCH candidate in units of four symbols after layer mapping and precoding and/or before mapping to physical resource REGs.
Step 803: the network device sends at least one first PDCCH candidate in a PDCCH candidate set to the first UE on the broadcast special carrier, wherein the first PDCCH candidate is composed of N.L CCEs, the starting positions of the code bit collection of the front (N/2) L CCEs and the rear (N/2) L CCEs respectively composing the first PDCCH candidate are the same, L is an integer greater than or equal to 8, and N is an even number greater than 0.
For example, in this step 803, the network device sends (at least one) first PDCCH composed of (at least) one second PDCCH candidate and at least one third PDCCH candidate, where the second PDCCH candidate is composed of (N/2) ×l CCEs, L is an integer greater than or equal to 8, and N is an even number greater than 0.
The symbol corresponding to the at least one third PDCCH candidate interleaved prior to modulation may be predefined by the network device and the first UE.
For example, the network device and the first UE predefine that the first (N/2) x L CCEs used to form the first PDCCH candidate form the second PDCCH candidate, and the second (N/2) x L CCEs form the third PDCCH candidate, or the network device and the first UE predefine that the first (N/2) x L CCEs used to form the first PDCCH candidate form the third PDCCH candidate, and the second (N/2) x L CCEs form the second PDCCH candidate.
Alternatively, the first UE may determine the at least one third PDCCH candidate for constituting the first PDCCH candidate by receiving a MIB message or SIB message or SI message transmitted by the network device.
For example, the first UE determines that the first (N/2) x L CCEs form the second PDCCH candidate by receiving the MIB message or SIB message or SI message sent by the network device, and the second (N/2) x L CCEs form the third PDCCH candidate, or the first UE determines that the first (N/2) x L CCEs form the third PDCCH candidate and the second (N/2) x L CCEs form the second PDCCH candidate by receiving the MIB message or SIB message or SI message sent by the network device.
Alternatively, the interleaving process in this step 703 may be distinguished from the existing interleaving technique (including the interleaving process that generates the second PDCCH candidate). For example, the process of performing inter-column permutation on the matrix in step 3) based on the pattern shown in table 26 or table 27 is different from the existing process.
Step 804: the first UE deinterleaves symbols included in the at least one third PDCCH candidate in units of four symbols.
For example, the symbols may be symbol quadruples in units of four symbols, and are mapped to one resource element group REG.
Specifically, the first UE de-interleaves the third PDCCH symbol quadruple, which specifically includes the following steps:
step (1) and step (2) see step 1) and step 2) in step 802 to determine the number of rows and columns of the deinterleaver matrix.
(3) The < NULL > element positions in the initial matrix of the deinterleaver (corresponding to the inter-column permutation matrix of the interleaver) are determined according to step 3) and step 4) in step 802, and the < NULL > elements are written in the corresponding positions of the initial matrix of the deinterleaver.
(4) The symbol quadruples are written into the initial matrix of the deinterleaver sequentially from left to right (left and right when the symbol quadruples are arranged) column by column, and the positions in the initial matrix of the deinterleaver, where the < NULL > elements are already written, are skipped until the initial matrix of the deinterleaver is filled.
(5) The initial matrix of the deinterleaver is inversely permuted according to the inter-column permutation pattern shown in table 26 or table 27 used in step 4) in step 802, and an inter-column permutation matrix of the deinterleaver (corresponding to the initial matrix of the interleaver) is determined.
(6) Reading symbol quadruples from a row to row in an inter-column permutation matrix of the deinterleaver in an order from top to bottom (up and down when the inter-column permutation matrix is arranged), and skipping < NULL > elements in the inter-column permutation matrix of the deinterleaver to determine a symbol quadruple sequence after deinterleaving.
For example, the first UE de-interleaves symbols included in the at least one third PDCCH candidate in units of four symbols after resource inverse mapping and/or before de-layer mapping and de-precoding.
Alternatively, since the deinterleaving process is the inverse of the interleaving process, if the interleaving process in step 803 is different from the existing scrambling technique, the deinterleaving process in step 804 is also different from the existing deinterleaving process.
Step 805: the first UE detects at least one first PDCCH candidate in a set of PDCCH candidates on the broadcast dedicated carrier.
In this step 805, except that the first PDCCH candidate is composed of a second PDCCH candidate and a third PDCCH candidate, which are different from those in the step 303, the process of detecting the first PDCCH candidate by the first UE in this step 805 may refer to the step 303, and the similarities are not repeated herein, where in this step 805, the second PDCCH may be composed of front (N/2) x L CCEs, the third PDCCH candidate may be composed of rear (N/2) x L CCEs, or the third PDCCH candidate may be composed of front (N/2) x L CCEs, and the second PDCCH may be composed of rear (N/2) x L CCEs.
Alternatively, the order in which the first UE performs the steps 804 and 805 is not limited, and the first UE may perform the step 804 and then perform the step 805, or the first UE may perform the step 805 and then perform the step 804.
Therefore, for the old UE, when the aggregation level of the PDCCH is greater than or equal to that of the old UE, the old UE cannot detect the PDCCH sent by the network device, that is, cannot read the PDCCH repeatedly sent, so that the problem of ambiguity handling is avoided, and for the first UE (i.e., the new UE), the first UE can detect the PDCCH sent by the network device.
The method for detecting the PDCCH according to the embodiment of the present application is described in detail above with reference to fig. 3 to 8, and based on the same inventive concept as the method for detecting the PDCCH, the embodiment of the present application further provides a device for detecting the PDCCH, as shown in fig. 9, where the device 900 for detecting the PDCCH includes a processing unit 901 and a transceiver unit 902, and the device 900 may be used to implement the method described in the method embodiment applied to the UE or the network device, where the UE includes a first UE and/or a second UE, and the description of the first UE is mainly herein.
In one embodiment, the apparatus 900 is applied to a first UE.
Specifically, the processing unit 901 is configured to access a broadcast dedicated carrier;
a transceiver unit 902, configured to receive at least one first PDCCH candidate in a PDCCH candidate set on the broadcast dedicated carrier, where the first PDCCH candidate is composed of n×l control channel elements CCEs, where starting positions of coded bit collection of a front (N/2) L CCE and a rear (N/2) L CCE in the n×l CCEs are the same, L is an integer greater than or equal to 8, and N is an even number greater than 0;
the processing unit 901 is further configured to detect the at least one first PDCCH candidate.
In one implementation, the first PDCCH candidate consists of n×l consecutive CCEs starting with a first starting CCE, which is CCE index 0.
In one implementation, the first (N/2) x L CCEs and the second (N/2) x L CCEs respectively constitute two second PDCCH candidates.
In one implementation, the first (N/2) L CCEs constitute a second PDCCH candidate and the later (N/2) L CCEs constitute a third PDCCH candidate, wherein the third PDCCH candidate is different from scrambling and/or interleaving of the second PDCCH candidate; or alternatively
The first (N/2) L CCEs constitute a third PDCCH candidate and the later (N/2) L CCEs constitute a second PDCCH candidate, wherein the third PDCCH candidate is different from scrambling and/or interleaving of the second PDCCH candidate.
In one implementation, the first PDCCH candidate is in a common search space.
In one implementation manner, the processing unit 901 is specifically configured to, if a first UE receives an indication for detecting the first PDCCH candidate sent by a network device, detect at least one first PDCCH candidate in the PDCCH candidate set by the first UE; or if the first UE supports detection of the first PDCCH candidates, the first UE detects at least one first PDCCH candidate in the PDCCH candidate set.
In one implementation, the indication of detecting the first PDCCH candidate is indicated by an MBMS primary information block carried by a physical broadcast channel PBCH.
In another embodiment, the apparatus 900 is applied to a network device.
Specifically, the transceiver unit 902 is configured to send, to the UE, a signal for the UE to access on a broadcast dedicated carrier;
a processing unit 901, configured to determine at least one PDCCH candidate in a PDCCH candidate set, where the first PDCCH candidate is composed of n×l control channel elements CCEs, where n×l CCEs, starting positions of coded bit collection of a first (N/2) ×l CCE and a second (N/2) ×l CCE are the same, L is an integer greater than or equal to 8, and N is an even number greater than 0;
The transceiver unit 902 is further configured to send the at least one first PDCCH candidate to the UE on the broadcast dedicated carrier.
In one implementation, the first PDCCH candidate consists of n×l consecutive CCEs starting with a first starting CCE, which is CCE index 0.
In one implementation, the first (N/2) x L CCEs and the second (N/2) x L CCEs respectively constitute two second PDCCH candidates.
In one implementation, the first (N/2) L CCEs constitute a second PDCCH candidate and the later (N/2) L CCEs constitute a third PDCCH candidate, wherein the third PDCCH candidate is different from scrambling and/or interleaving of the second PDCCH candidate; or alternatively
The first (N/2) L CCEs constitute a third PDCCH candidate and the later (N/2) L CCEs constitute a second PDCCH candidate, wherein the third PDCCH candidate is different from scrambling and/or interleaving of the second PDCCH candidate.
In one implementation, the first PDCCH candidate is in a common search space.
In one implementation, the transceiver unit 902 is further configured to send an indication of detecting a first PDCCH candidate to the first UE.
In one implementation, the indication of detecting the first PDCCH candidate is at least one information in an MBMS primary information block carried by a physical broadcast channel PBCH.
It should be noted that, in the embodiments of the present application, the division of the modules is merely schematic, and there may be another division manner in actual implementation, and in addition, each functional unit in each embodiment of the present application may be integrated in one processing unit, or may exist alone physically, or two or more units may be integrated in one unit. The integrated units may be implemented in hardware or in software functional units.
The integrated units, if implemented in the form of software functional units and sold or used as stand-alone products, may be stored in a computer readable storage medium. Based on such understanding, the technical solution of the present application may be embodied in essence or a part contributing to the prior art or all or part of the technical solution, in the form of a software product stored in a storage medium, including several instructions to cause a computer device (which may be a personal computer, a server, or a network device, etc.) or a processor (processor) to perform all or part of the steps of the methods described in the embodiments of the present application. And the aforementioned storage medium includes: a U-disk, a removable hard disk, a Read-Only Memory (ROM), a random access Memory (Random Access Memory, RAM), a magnetic disk, or an optical disk, or other various media capable of storing program codes.
Based on the same concept as the PDCCH detection method described above, as shown in fig. 10, the embodiment of the present application further provides a schematic structural diagram of a PDCCH detection apparatus 1000. The apparatus 1000 may be used to implement the methods described in the method embodiments of the UE or the network device described above, and reference may be made to the description in the method embodiments described above. The UE includes a first UE and/or a second UE. The apparatus 1000 may be in or be a UE or a network device.
The apparatus 1000 includes one or more processors 1001. The processor 1001 may be a general purpose processor or a special purpose processor, etc. For example, a baseband processor, or a central processing unit. The baseband processor may be used to process communication protocols and communication data, and the central processor may be used to control a communication device (e.g., a base station, a terminal, or a chip, etc.), execute a software program, and process the data of the software program. The communication device may comprise a transceiver unit for enabling input (reception) and output (transmission) of signals. For example, the transceiver unit may be a transceiver, a radio frequency chip, or the like.
The apparatus 1000 includes one or more of the processors 1001, where the one or more processors 1001 may implement the methods of the UE or network device in the embodiments shown above.
Alternatively, the processor 1001 may implement other functions in addition to the method of the above-described illustrated embodiment.
Alternatively, in one design, the processor 1001 may execute instructions to cause the apparatus 1000 to perform the method described in the method embodiment above. The instructions may be stored in whole or in part within the processor, such as instruction 1003, or in whole or in part in a memory 1002 coupled to the processor, such as instruction 1004, or may cause the apparatus 1000, together with instructions 1003 and 1004, to perform the methods described in the method embodiments described above.
In yet another possible design, the communication apparatus 1000 may also include circuitry that may implement the functionality of the UE or the network device in the foregoing method embodiments.
In yet another possible design, the apparatus 1000 may include one or more memories 1002 having instructions 1004 stored thereon that are executable on the processor to cause the apparatus 1000 to perform the methods described in the method embodiments above. Optionally, the memory may further store data. The optional processor may also store instructions and/or data. For example, the one or more memories 1002 may store the correspondence described in the above embodiments, or related parameters or tables or the like involved in the above embodiments. The processor and the memory may be provided separately or may be integrated.
In yet another possible design, the apparatus 1000 may further include a transceiver 1005 and an antenna 1006. The processor 1001 may be referred to as a processing unit, controlling the devices (terminals or base stations). The transceiver 1005 may be referred to as a transceiver, a transceiver circuit, a transceiver, or the like, for implementing the transceiver function of the device through the antenna 1006.
It should be noted that the processor in the embodiments of the present application may be an integrated circuit chip with signal processing capability. In implementation, the steps of the above method embodiments may be implemented by integrated logic circuits of hardware in a processor or instructions in software form. The processor may be a general purpose processor, a digital signal processor (Digital Signal Processor, DSP), an application specific integrated circuit (Application Specific Integrated Circuit, ASIC), an off-the-shelf programmable gate array (Field Programmable Gate Array, FPGA) or other programmable logic device, discrete gate or transistor logic device, discrete hardware components. The disclosed methods, steps, and logic blocks in the embodiments of the present application may be implemented or performed. A general purpose processor may be a microprocessor or the processor may be any conventional processor or the like. The steps of a method disclosed in connection with the embodiments of the present application may be embodied directly in hardware, in a decoded processor, or in a combination of hardware and software modules in a decoded processor. The software modules may be located in a random access memory, flash memory, read only memory, programmable read only memory, or electrically erasable programmable memory, registers, etc. as well known in the art. The storage medium is located in a memory, and the processor reads the information in the memory and, in combination with its hardware, performs the steps of the above method.
It will be appreciated that the memory in embodiments of the present application may be either volatile memory or nonvolatile memory, or may include both volatile and nonvolatile memory. The nonvolatile Memory may be a Read-Only Memory (ROM), a Programmable ROM (PROM), an Erasable PROM (EPROM), an Electrically Erasable EPROM (EEPROM), or a flash Memory. The volatile memory may be random access memory (Random Access Memory, RAM) which acts as an external cache. By way of example, and not limitation, many forms of RAM are available, such as Static RAM (SRAM), dynamic RAM (DRAM), synchronous DRAM (SDRAM), double Data Rate SDRAM (Double Data Rate SDRAM), enhanced SDRAM (ESDRAM), synchronous DRAM (SLDRAM), and Direct RAM (DR RAM). It should be noted that the memory of the systems and methods described herein is intended to comprise, without being limited to, these and any other suitable types of memory.
The embodiment of the application also provides a computer readable medium, on which a computer program is stored, where the computer program is executed by a computer to implement a method for detecting PDCCH according to any of the method embodiments applied to UE or network equipment.
The present application also provides a computer program product, which when executed by a computer, implements the method for detecting PDCCH according to any of the method embodiments applied to UE or network equipment.
In the above embodiments, it may be implemented in whole or in part by software, hardware, firmware, or any combination thereof. When implemented in software, may be implemented in whole or in part in the form of a computer program product. The computer program product includes one or more computer instructions. When the computer instructions are loaded and executed on a computer, the processes or functions described in accordance with embodiments of the present application are produced in whole or in part. The computer may be a general purpose computer, a special purpose computer, a computer network, or other programmable apparatus. The computer instructions may be stored in a computer-readable storage medium or transmitted from one computer-readable storage medium to another computer-readable storage medium, for example, the computer instructions may be transmitted from one website, computer, server, or data center to another website, computer, server, or data center by a wired (e.g., coaxial cable, fiber optic, digital subscriber line (Digital Subscriber Line, DSL)) or wireless (e.g., infrared, wireless, microwave, etc.). The computer readable storage medium may be any available medium that can be accessed by a computer or a data storage device such as a server, data center, etc. that contains an integration of one or more available media. The usable medium may be a magnetic medium (e.g., a floppy Disk, a hard Disk, a magnetic tape), an optical medium (e.g., a high-density digital video disc (Digital Video Disc, DVD)), or a semiconductor medium (e.g., a Solid State Disk (SSD)), or the like.
The embodiment of the application also provides a processing device, which comprises a processor and an interface; the processor is configured to perform the method for detecting PDCCH according to any of the method embodiments applied to UE or network device.
It should be understood that the processing device may be a chip, and the processor may be implemented by hardware or software, and when implemented by hardware, the processor may be a logic circuit, an integrated circuit, or the like; when implemented in software, the processor may be a general-purpose processor, implemented by reading software code stored in a memory, which may be integrated in the processor, or may reside outside the processor, and exist separately.
The foregoing details of the configuration method of the CFI in the embodiments of the present application are described in conjunction with fig. 4 to 5, and based on the same inventive concept as the foregoing configuration method of the CFI, the embodiments of the present application further provide a configuration apparatus of the CFI, as shown in fig. 11, where the configuration apparatus 1100 of the CFI includes a processing unit 1101 and a transceiver unit 1102, and the apparatus 1100 may be used to implement the method described in the foregoing method embodiment applied to a UE or a network device, where the UE includes a first UE and/or a second UE, and the description of the first UE is mainly herein described.
In one embodiment, the apparatus 1100 is applied to a UE.
Specifically, the processing unit 1101 is configured to determine a CFI, where the CFI is used to indicate a number of symbols occupied by PDCCH transmission in one subframe, and the CFI is determined by at least one of the following manners:
the UE determines the CFI according to the received third information;
the UE determines the CFI according to a predefined;
and the UE determines the CFI according to the first corresponding relation and the fourth information.
A transceiver 1102, configured to receive a downlink control information PDCCH;
the processing unit is further configured to detect the PDCCH according to the CFI.
In one implementation, the third information and/or fourth information is carried in an MBMS master information block.
In one implementation, the third information indicates the value of the CFI by 1 bit, including one of the following: 1,2 and 3; or one of 2,3 and 4; or one of 1,2 and 4; or one of 1,3 and 4; or one of 1,2,3 and 4.
In one implementation, the third information indicates the value of the CFI by 1 bit, and the value 0 indicates the value of the CFI without using the third information, and the value 1 indicates the value of the CFI, including one of the following cases: 1,2 and 3; or one of 2,3 and 4; or one of 1,2 and 4; or one of 1,3 and 4; or one of 1,2,3 and 4.
In one implementation, the third information indicates the value of the CFI by 1 bit, and the value 1 indicates the value of the CFI without using the third information, and the value 0 indicates the value of the CFI, including one of the following cases: 1,2 and 3; or one of 2,3 and 4; or one of 1,2 and 4; or one of 1,3 and 4; or one of 1,2,3 and 4.
In one implementation, the third information indicates the value of the CFI by 2 bits, including one of: 1,2 and 3; or one of 2,3 and 4; or one of 1,2 and 4; or one of 1,3 and 4; or one of 1,2,3 and 4.
In one implementation, the third information indicates the value of the CFI by 2 bits, including one of: 1,2 and 3; or 2,3 and 4; or 1,2 and 4; or 1,3 and 4; or 1,2,3 and 4.
In one implementation, the third information indicates the value of the CFI by 2 bits, and the value 00 indicates the value of the CFI without using the third information, and the value of the CFI indicated by one of the values 01, 10, and 11 includes one of the following cases: 1,2 and 3; or one of 2,3 and 4; or one of 1,2 and 4; or one of 1,3 and 4; or one of 1,2,3 and 4.
In one implementation, the third information indicates the value of the CFI by 2 bits, and the value 11 indicates the value of the CFI indicated without using the third information, and the value of the CFI indicated by one of the values 00, 01, and 10 includes one of the following cases: 1,2 and 3; or one of 2,3 and 4; or one of 1,2 and 4; or one of 1,3 and 4; or one of 1,2,3 and 4.
In one implementation, the processing unit is specifically configured to determine the CFI value according to a predefined definition, where the CFI value includes one of 1,2,3, and 4.
In one implementation, the UE determines the value of the CFI according to sixth information and a predefined, the sixth information including 1 bit; the value 0 indicates a value for which CFI is determined without using a predefined definition, and the value 1 indicates a value for the CFI, including one of the following cases: 1,2 and 3; or one of 2,3 and 4; or one of 1,2 and 4; or one of 1,3 and 4; or one of 1,2,3 and 4; or a value of 1 indicates a value indicating that the predefined CFI is not used, and a value of 0 indicates a value of the CFI, including one of the following: 1,2 and 3; or one of 2,3 and 4; or one of 1,2 and 4; or one of 1,3 and 4; or one of 1,2,3 and 4.
In one implementation manner, the processing unit is specifically configured to determine the CFI according to a first correspondence and fourth information, where the fourth information is used to indicate a system bandwidth or a number of resource blocks RBs; the first correspondence includes a correspondence between a value of a system bandwidth and a value of a CFI, or a correspondence between a number of RBs and a value of a CFI.
In one implementation, the UE determines the CFI according to fifth information, and the first correspondence and fourth information, the fifth information including 1 bit; a value of 0 indicates a value of CFI determined without using the first correspondence and the fourth information, and a value of 1 indicates a value of CFI determined using the first correspondence and the fourth information; or a value of 1 indicates that the value of CFI is not determined using the first correspondence and the fourth information, and a value of 0 determines the value of CFI using the first correspondence and the fourth information.
In one implementation manner, the first correspondence relationship includes a correspondence relationship between a value of a system bandwidth and a value of a CFI, or a correspondence relationship between a number of RBs and a value of a CFI, including:
when the number of the system bandwidths or the number of the RBs is smaller than a first number, the number of the CFIs is 3;
When the value of the system bandwidth or the number of RBs is greater than or equal to a first value and less than a second value, the value of the CFI is 2;
when the number of the system bandwidths or the number of the RBs is greater than or equal to a second value, the number of the CFIs is 1.
In one implementation manner, the first correspondence relationship includes a correspondence relationship between a value of a system bandwidth and a value of a CFI, or a correspondence relationship between a number of RBs and a value of a CFI, including:
when the number of the system bandwidths or the number of the RBs is smaller than or equal to a first number, the number of the CFIs is 3;
when the value of the system bandwidth or the number of RBs is greater than a first value and less than or equal to a second value, the value of the CFI is 2;
when the number of the system bandwidths or the number of the RBs is greater than a second value, the value of the CFI is 1.
In one implementation manner, the first correspondence relationship includes a correspondence relationship between a value of a system bandwidth and a value of a CFI, or a correspondence relationship between a number of RBs and a value of a CFI, including:
when the number of the system bandwidths or the number of the RBs is smaller than a first value, the number of the CFIs is 4;
When the value of the system bandwidth or the number of RBs is greater than or equal to a first value and less than a second value, the value of the CFI is 3;
when the number of the system bandwidths or the number of the RBs is greater than or equal to a second value and smaller than a third value, the number of the CFIs is 2;
when the number of the system bandwidths or the number of the RBs is greater than or equal to a third value, the number of the CFIs is 1.
In one implementation manner, the first correspondence relationship includes a correspondence relationship between a value of a system bandwidth and a value of a CFI, or a correspondence relationship between a number of RBs and a value of a CFI, including:
when the number of the system bandwidths or the number of the RBs is smaller than or equal to a first number, the number of the CFIs is 4;
when the value of the system bandwidth or the number of RBs is greater than a first value and less than or equal to a second value, the value of the CFI is 3;
when the value of the system bandwidth or the number of RBs is greater than a second value and less than or equal to a third value, the value of the CFI is 2;
when the number of the system bandwidths or the number of the RBs is greater than a third value, the number of the CFIs is 1.
In one implementation manner, the first correspondence relationship includes a correspondence relationship between a value of a system bandwidth and a value of a CFI, or a correspondence relationship between a number of RBs and a value of a CFI, including:
When the number of the system bandwidths or the number of the RBs is smaller than a first number, the number of the CFIs is 2; when the value of the system bandwidth or the value of the RB is greater than or equal to a second value, the value of the CFI is 1; or alternatively
When the number of the system bandwidths or the number of the RBs is smaller than a first number, the number of the CFIs is 3; when the value of the system bandwidth or the value of the RB is greater than or equal to a second value, the value of the CFI is 1; or alternatively
When the number of the system bandwidths or the number of the RBs is smaller than a first number, the number of the CFIs is 3; when the value of the system bandwidth or the value of the RB is greater than or equal to a second value, the value of the CFI is 2.
In one implementation manner, the first correspondence relationship includes a correspondence relationship between a value of a system bandwidth and a value of a CFI, or a correspondence relationship between a number of RBs and a value of a CFI, including:
when the number of the system bandwidths or the number of the RBs is smaller than or equal to a first number, the number of the CFIs is 2; when the value of the system bandwidth or the value of the RB is greater than a second value, the value of the CFI is 1; or alternatively
When the number of the system bandwidths or the number of the RBs is smaller than or equal to a first number, the number of the CFIs is 3; when the value of the system bandwidth or the value of the RB is greater than a second value, the value of the CFI is 1; or alternatively
When the number of the system bandwidths or the number of the RBs is smaller than or equal to a first number, the number of the CFIs is 3; when the value of the system bandwidth or the value of the RB is greater than a second value, the value of the CFI is 2.
In another embodiment, the apparatus 1100 is applied to a network device.
Specifically, the processing unit 1101 is configured to determine a third message and/or a fourth message, where the third message and the fourth message are used to indicate CFI, and the CFI is used to indicate the number of symbols occupied by PDCCH transmission in one subframe;
a transceiver 1102, configured to send a third message and/or a fourth message to the user terminal UE, where the third information and/or the fourth information is information carried in a physical broadcast channel PBCH.
In one implementation, the third information and/or fourth information is carried in an MBMS master information block.
In one implementation, the third information indicates the value of the CFI by 1 bit, including one of the following: 1,2 and 3; or one of 2,3 and 4; or one of 1,2 and 4; or one of 1,3 and 4; or one of 1,2,3 and 4.
In one implementation, the third information indicates the value of the CFI by 1 bit, and the value 0 indicates the value of the CFI without using the third information, and the value 1 indicates the value of the CFI, including one of the following cases: 1,2 and 3; or one of 2,3 and 4; or one of 1,2 and 4; or one of 1,3 and 4; or one of 1,2,3 and 4.
In one implementation, the third information indicates the value of the CFI by 1 bit, and the value 1 indicates the value of the CFI without using the third information, and the value 0 indicates the value of the CFI, including one of the following cases: 1,2 and 3; or one of 2,3 and 4; or one of 1,2 and 4; or one of 1,3 and 4; or one of 1,2,3 and 4.
In one implementation, the third information indicates the value of the CFI by 2 bits, including one of: 1,2 and 3; or one of 2,3 and 4; or one of 1,2 and 4; or one of 1,3 and 4; or one of 1,2,3 and 4.
In one implementation, the third information indicates the value of the CFI by 2 bits, including one of: 1,2 and 3; or 2,3 and 4; or 1,2 and 4; or 1,3 and 4; or 1,2,3 and 4.
In one implementation, the third information indicates the value of the CFI by 2 bits, and the value 00 indicates the value of the CFI without using the third information, and the value of the CFI indicated by one of the values 01, 10, and 11 includes one of the following cases: 1,2 and 3; or one of 2,3 and 4; or one of 1,2 and 4; or one of 1,3 and 4; or one of 1,2,3 and 4.
In one implementation, the third information indicates the value of the CFI by 2 bits, and the value 11 indicates the value of the CFI indicated without using the third information, and the value of the CFI indicated by one of the values 00, 01, and 10 includes one of the following cases: 1,2 and 3; or one of 2,3 and 4; or one of 1,2 and 4; or one of 1,3 and 4; or one of 1,2,3 and 4.
In one implementation, the fourth information is used to indicate a system bandwidth or a number of resource blocks RBs.
It should be noted that, in the embodiments of the present application, the division of the modules is merely schematic, and there may be another division manner in actual implementation, and in addition, each functional unit in each embodiment of the present application may be integrated in one processing unit, or may exist alone physically, or two or more units may be integrated in one unit. The integrated units may be implemented in hardware or in software functional units.
The integrated units, if implemented in the form of software functional units and sold or used as stand-alone products, may be stored in a computer readable storage medium. Based on such understanding, the technical solution of the present application may be embodied in essence or a part contributing to the prior art or all or part of the technical solution, in the form of a software product stored in a storage medium, including several instructions to cause a computer device (which may be a personal computer, a server, or a network device, etc.) or a processor (processor) to perform all or part of the steps of the methods described in the embodiments of the present application. And the aforementioned storage medium includes: a U-disk, a removable hard disk, a Read-Only Memory (ROM), a random access Memory (Random Access Memory, RAM), a magnetic disk, or an optical disk, or other various media capable of storing program codes.
Based on the same concept as the above-mentioned CFI configuration method, as shown in fig. 12, the embodiment of the present application further provides a schematic structural diagram of a CFI configuration apparatus 1200. The apparatus 1200 may be used to implement the methods described in the method embodiments of the UE or the network device described above, and reference may be made to the description in the method embodiments described above. The UE includes a first UE and/or a second UE. The apparatus 1200 may be in or be a UE or a network device.
The apparatus 1200 includes one or more processors 1201. The processor 1201 may be a general purpose processor or a special purpose processor, or the like. For example, a baseband processor, or a central processing unit. The baseband processor may be used to process communication protocols and communication data, and the central processor may be used to control a communication device (e.g., a base station, a terminal, or a chip, etc.), execute a software program, and process the data of the software program. The communication device may comprise a transceiver unit for enabling input (reception) and output (transmission) of signals. For example, the transceiver unit may be a transceiver, a radio frequency chip, or the like.
The apparatus 1200 includes one or more of the processors 1201, where the one or more processors 1201 may implement the methods of the UE or network device in the embodiments shown above.
Alternatively, the processor 1201 may implement other functions in addition to the methods of the embodiments shown above.
Alternatively, in one design, the processor 1201 may execute instructions to cause the apparatus 1200 to perform the methods described in the method embodiments above. The instructions may be stored in whole or in part within the processor, such as instruction 1203, or in whole or in part within a memory 1202 coupled to the processor, such as instruction 1204, or may together cause apparatus 1200 to perform the methods described in the method embodiments above by instructions 1203 and 1204.
In yet another possible design, the communication apparatus 1200 may also include circuitry that may implement the functionality of the UE or the network device in the foregoing method embodiments.
In yet another possible design, the apparatus 1200 may include one or more memories 1202 having instructions 1204 stored thereon that are executable on the processor to cause the apparatus 1200 to perform the methods described in the method embodiments above. Optionally, the memory may further store data. The optional processor may also store instructions and/or data. For example, the one or more memories 1202 may store the correspondence described in the above embodiments, or related parameters or tables, etc. involved in the above embodiments. The processor and the memory may be provided separately or may be integrated.
In yet another possible design, the apparatus 1200 may further include a transceiver 1205 and an antenna 1206. The processor 1201 may be referred to as a processing unit, controlling the apparatus (terminal or base station). The transceiver 1205 may be referred to as a transceiver, transceiver circuitry, or transceiver, etc. for implementing the transceiver functions of the device via the antenna 1206.
It should be noted that the processor in the embodiments of the present application may be an integrated circuit chip with signal processing capability. In implementation, the steps of the above method embodiments may be implemented by integrated logic circuits of hardware in a processor or instructions in software form. The processor may be a general purpose processor, a digital signal processor (Digital Signal Processor, DSP), an application specific integrated circuit (Application Specific Integrated Circuit, ASIC), an off-the-shelf programmable gate array (Field Programmable Gate Array, FPGA) or other programmable logic device, discrete gate or transistor logic device, discrete hardware components. The disclosed methods, steps, and logic blocks in the embodiments of the present application may be implemented or performed. A general purpose processor may be a microprocessor or the processor may be any conventional processor or the like. The steps of a method disclosed in connection with the embodiments of the present application may be embodied directly in hardware, in a decoded processor, or in a combination of hardware and software modules in a decoded processor. The software modules may be located in a random access memory, flash memory, read only memory, programmable read only memory, or electrically erasable programmable memory, registers, etc. as well known in the art. The storage medium is located in a memory, and the processor reads the information in the memory and, in combination with its hardware, performs the steps of the above method.
It will be appreciated that the memory in embodiments of the present application may be either volatile memory or nonvolatile memory, or may include both volatile and nonvolatile memory. The nonvolatile Memory may be a Read-Only Memory (ROM), a Programmable ROM (PROM), an Erasable PROM (EPROM), an Electrically Erasable EPROM (EEPROM), or a flash Memory. The volatile memory may be random access memory (Random Access Memory, RAM) which acts as an external cache. By way of example, and not limitation, many forms of RAM are available, such as Static RAM (SRAM), dynamic RAM (DRAM), synchronous DRAM (SDRAM), double Data Rate SDRAM (Double Data Rate SDRAM), enhanced SDRAM (ESDRAM), synchronous DRAM (SLDRAM), and Direct RAM (DR RAM). It should be noted that the memory of the systems and methods described herein is intended to comprise, without being limited to, these and any other suitable types of memory.
The present application also provides a computer readable medium, on which a computer program is stored, which when executed by a computer implements the method of configuring CFI as described in any of the method embodiments applied to a UE or a network device.
The present application also provides a computer program product which, when executed by a computer, implements the method of CFI configuration described in any of the method embodiments applied to a UE or a network device.
In the above embodiments, it may be implemented in whole or in part by software, hardware, firmware, or any combination thereof. When implemented in software, may be implemented in whole or in part in the form of a computer program product. The computer program product includes one or more computer instructions. When the computer instructions are loaded and executed on a computer, the processes or functions described in accordance with embodiments of the present application are produced in whole or in part. The computer may be a general purpose computer, a special purpose computer, a computer network, or other programmable apparatus. The computer instructions may be stored in a computer-readable storage medium or transmitted from one computer-readable storage medium to another computer-readable storage medium, for example, the computer instructions may be transmitted from one website, computer, server, or data center to another website, computer, server, or data center by a wired (e.g., coaxial cable, fiber optic, digital subscriber line (Digital Subscriber Line, DSL)) or wireless (e.g., infrared, wireless, microwave, etc.). The computer readable storage medium may be any available medium that can be accessed by a computer or a data storage device such as a server, data center, etc. that contains an integration of one or more available media. The usable medium may be a magnetic medium (e.g., a floppy Disk, a hard Disk, a magnetic tape), an optical medium (e.g., a high-density digital video disc (Digital Video Disc, DVD)), or a semiconductor medium (e.g., a Solid State Disk (SSD)), or the like.
The embodiment of the application also provides a processing device, which comprises a processor and an interface; the processor is configured to perform the method of the configuration of the CFI described in any of the method embodiments applied to the UE or the network device.
It should be understood that the processing device may be a chip, and the processor may be implemented by hardware or software, and when implemented by hardware, the processor may be a logic circuit, an integrated circuit, or the like; when implemented in software, the processor may be a general-purpose processor, implemented by reading software code stored in a memory, which may be integrated in the processor, or may reside outside the processor, and exist separately.
Those of ordinary skill in the art will appreciate that the elements and algorithm steps described in connection with the embodiments disclosed herein may be embodied in electronic hardware, in computer software, or in a combination of the two, and that the elements and steps of the examples have been generally described in terms of function in the foregoing description to clearly illustrate the interchangeability of hardware and software. Whether such functionality is implemented as hardware or software depends upon the particular application and design constraints imposed on the solution. Skilled artisans may implement the described functionality in varying ways for each particular application, but such implementation decisions should not be interpreted as causing a departure from the scope of the present application.
It will be clear to those skilled in the art that, for convenience and brevity of description, specific working procedures of the above-described systems, apparatuses and units may refer to corresponding procedures in the foregoing method embodiments, and are not repeated herein.
In the several embodiments provided in this application, it should be understood that the disclosed systems, devices, and methods may be implemented in other manners. For example, the apparatus embodiments described above are merely illustrative, e.g., the division of elements is merely a logical functional division, and there may be additional divisions of actual implementation, e.g., multiple elements or components may be combined or integrated into another system, or some features may be omitted, or not performed. In addition, the coupling or direct coupling or communication connection shown or discussed with each other may be an indirect coupling or communication connection via some interfaces, devices, or elements, or may be an electrical, mechanical, or other form of connection.
The units described as separate units may or may not be physically separate, and units shown as units may or may not be physical units, may be located in one place, or may be distributed over a plurality of network units. Some or all of the units may be selected according to actual needs to achieve the purposes of the embodiments of the present application.
In addition, each functional unit in each embodiment of the present application may be integrated in one processing unit, or each unit may exist alone physically, or two or more units may be integrated in one unit. The integrated units may be implemented in hardware or in software functional units.
From the above description of embodiments, it will be apparent to those skilled in the art that the present application may be implemented in hardware, or firmware, or a combination thereof. When implemented in software, the functions described above may be stored on or transmitted over as one or more instructions or code on a computer-readable medium. Computer-readable media includes both computer storage media and communication media including any medium that facilitates transfer of a computer program from one place to another. A storage media may be any available media that can be accessed by a computer. Taking this as an example but not limited to: the computer readable medium may include RAM, ROM, EEPROM, CD-ROM or other optical disk storage, magnetic disk storage media or other magnetic storage devices, or any other medium that can be used to carry or store desired program code in the form of instructions or data structures and that can be accessed by a computer. Furthermore, it is possible to provide a device for the treatment of a disease. Any connection is properly termed a computer-readable medium. For example, if the software is transmitted from a website, server, or other remote source using a coaxial cable, fiber optic cable, twisted pair, digital Subscriber Line (DSL), or wireless technologies such as infrared, radio, and microwave, then the coaxial cable, fiber optic cable, twisted pair, DSL, or wireless technologies such as infrared, radio, and microwave are included in the fixing of the medium. As used herein, discs (disks) and disks include Compact Discs (CDs), laser discs, optical discs, digital Versatile Discs (DVDs), floppy disks, and blu-ray discs where disks usually reproduce data magnetically, while discs reproduce data optically with lasers. Combinations of the above should also be included within the scope of computer-readable media.
In summary, the foregoing description is only a preferred embodiment of the technical solution of the present application, and is not intended to limit the scope of the present application. Any modification, equivalent replacement, improvement, etc. made within the spirit and principles of the present application should be included in the protection scope of the present application.

Claims (31)

1. The method for detecting the physical downlink control channel PDCCH is characterized by comprising the following steps:
the method comprises the steps that a first user terminal (UE) accesses a broadcast special carrier;
the first UE detects at least one first PDCCH candidate in the PDCCH candidate set on the broadcast dedicated carrier, where the first PDCCH candidate is composed of n×l control channel elements CCE, where, of the n×l CCEs, a first bit in a sequence after the collection of coded bits corresponding to a first CCE in the first (N/2) L CCEs, a bit in the sequence before the collection of coded bits corresponding to the first bit or a bit index in the sequence before the collection of coded bits corresponding to the first bit in the sequence after the collection of coded bits corresponding to the first CCE in the last (N/2) L CCEs, a bit in the sequence before the collection of coded bits corresponding to the first CCE or a bit index in the sequence before the collection of coded bits corresponding to the first CCE is at least one identical, L is an integer greater than or equal to 8, and N is an even number greater than 0.
2. The method of claim 1, wherein the first PDCCH candidate consists of N x L consecutive CCEs starting with a first starting CCE, the first starting CCE being CCE index 0.
3. The method of claim 1 or 2, wherein the first (N/2) x L CCEs and the later (N/2) x L CCEs each constitute two second PDCCH candidates.
4. The method according to claim 1 or 2, wherein the first (N/2) L CCEs constitute a second PDCCH candidate and the later (N/2) L CCEs constitute a third PDCCH candidate, wherein the third PDCCH candidate is different from scrambling and/or interleaving of the second PDCCH candidate; or alternatively
The first (N/2) L CCEs constitute a third PDCCH candidate and the later (N/2) L CCEs constitute a second PDCCH candidate, wherein the third PDCCH candidate is different from scrambling and/or interleaving of the second PDCCH candidate.
5. The method of claim 1 or 2, wherein the first PDCCH candidate is in a common search space.
6. The method according to claim 1 or 2, wherein the detecting at least one first PDCCH candidate of the set of PDCCH candidates comprises:
if the first UE receives an indication of detecting the first PDCCH candidates sent by the network equipment, the first UE detects at least one first PDCCH candidate in the PDCCH candidate set; or alternatively
And if the first UE supports the detection of the first PDCCH candidates, the first UE detects at least one first PDCCH candidate in the PDCCH candidate set.
7. The method of claim 6 wherein the indication of detecting the first PDCCH candidate is indicated by an MBMS primary information block carried by a physical broadcast channel, PBCH.
8. The method for detecting the physical downlink control channel PDCCH is characterized by comprising the following steps:
the network equipment sends a signal for the UE to access to a user terminal (UE) on a broadcast special carrier;
the network device sends at least one first PDCCH candidate in a PDCCH candidate set to the UE on the broadcast dedicated carrier, where the first PDCCH candidate is composed of n×l control channel elements CCEs, where, of the n×l CCEs, a first bit in a sequence after the code bit corresponding to the first CCE in the first (N/2) L CCEs is collected, a bit in the sequence before the corresponding code bit is collected or a bit index in the sequence before the corresponding code bit is collected, a first bit in the sequence after the code bit corresponding to the first CCE in the last (N/2) L CCEs is collected, a bit in the sequence before the corresponding code bit is collected or a bit in the sequence before the corresponding code bit is collected is indexed to at least one same, L is an integer greater than or equal to 8, and N is an even number greater than 0.
9. The method of claim 8, wherein the first PDCCH candidate consists of N x L consecutive CCEs starting with a first starting CCE, the first starting CCE being CCE index 0.
10. The method of claim 8 or 9, wherein the first (N/2) x L CCEs and the second (N/2) x L CCEs each constitute two second PDCCH candidates.
11. The method according to claim 8 or 9, wherein the first (N/2) L CCEs constitute a second PDCCH candidate and the later (N/2) L CCEs constitute a third PDCCH candidate, wherein the third PDCCH candidate is different from scrambling and/or interleaving of the second PDCCH candidate; or alternatively
The first (N/2) L CCEs constitute a third PDCCH candidate and the later (N/2) L CCEs constitute a second PDCCH candidate, wherein the third PDCCH candidate is different from scrambling and/or interleaving of the second PDCCH candidate.
12. The method of claim 8 or 9, wherein the first PDCCH candidate is in a common search space.
13. The method according to claim 8 or 9, characterized in that the method further comprises:
the network device sends an indication to the UE to detect a first PDCCH candidate.
14. The method of claim 13, wherein the indication of detecting the first PDCCH candidate is at least one of MBMS primary information blocks carried by a physical broadcast channel, PBCH.
15. A device for detecting a physical downlink control channel PDCCH, comprising:
the processing unit is used for accessing the special broadcast carrier;
a transceiver unit, configured to receive at least one first PDCCH candidate in a PDCCH candidate set on the broadcast dedicated carrier, where the first PDCCH candidate is composed of n×l control channel elements CCE, where, in the n×l CCEs, a first bit in a sequence after coding bit collection corresponding to a first CCE in the first (N/2) L CCEs, a bit in the sequence before corresponding coding bit collection or a bit index in the sequence before corresponding coding bit collection is the same as at least one bit in a sequence after coding bit collection corresponding to the first CCE in the last (N/2) L CCEs, a bit in the sequence before corresponding coding bit collection or a bit index in the sequence before corresponding coding bit collection is the same, L is an integer greater than or equal to 8, and N is an even number greater than 0;
The processing unit is further configured to detect the at least one first PDCCH candidate.
16. The apparatus of claim 15, wherein the first PDCCH candidate consists of N x L consecutive CCEs starting with a first starting CCE, the first starting CCE being CCE index 0.
17. The apparatus of claim 15 or 16, wherein the first (N/2) x L CCEs and the second (N/2) x L CCEs each comprise two second PDCCH candidates.
18. The apparatus of claim 15 or 16, wherein the first (N/2) L CCEs constitute a second PDCCH candidate and the later (N/2) L CCEs constitute a third PDCCH candidate, wherein the third PDCCH candidate is different from scrambling and/or interleaving of the second PDCCH candidate; or alternatively
The first (N/2) L CCEs constitute a third PDCCH candidate and the later (N/2) L CCEs constitute a second PDCCH candidate, wherein the third PDCCH candidate is different from scrambling and/or interleaving of the second PDCCH candidate.
19. The apparatus of claim 15 or 16, wherein the first PDCCH candidate is in a common search space.
20. The apparatus according to claim 15 or 16, wherein the processing unit is specifically configured to detect at least one of the first PDCCH candidates in the PDCCH candidate set if an indication of detecting the first PDCCH candidates sent by a network device is received; or if the detection of the first PDCCH candidate is supported, detecting at least one first PDCCH candidate in the PDCCH candidate set.
21. The apparatus of claim 20, wherein the indication of detecting the first PDCCH candidate is indicated by an MBMS primary information block carried by a physical broadcast channel, PBCH.
22. A device for detecting a physical downlink control channel PDCCH, comprising:
a transceiver unit, configured to send a signal for access of a UE to a user terminal UE on a broadcast dedicated carrier;
a processing unit, configured to determine at least one first PDCCH candidate in a PDCCH candidate set, where the first PDCCH candidate is composed of n×l control channel elements CCE, where, among the n×l CCEs, a first bit in a sequence after coded bit collection corresponding to a first CCE in a first (N/2) preceding CCE, a bit in the sequence before coded bit collection corresponding to the first bit or a bit index in the sequence before coded bit collection corresponding to the first bit in the sequence after coded bit collection corresponding to the first CCE in a subsequent (N/2) preceding CCE, at least one bit in the sequence before coded bit collection corresponding to the first bit or a bit index in the sequence before coded bit collection corresponding to the first CCE is the same, L is an integer greater than or equal to 8, and N is an even number greater than 0;
The transceiver unit is further configured to send the at least one first PDCCH candidate to the UE on the broadcast dedicated carrier.
23. The apparatus of claim 22, wherein the first PDCCH candidate consists of N x L consecutive CCEs starting with a first starting CCE, the first starting CCE being CCE index 0.
24. The apparatus of claim 22 or 23, wherein the first (N/2) x L CCEs and the second (N/2) x L CCEs each comprise two second PDCCH candidates.
25. The apparatus of claim 22 or 23, wherein the first (N/2) L CCEs constitute a second PDCCH candidate and the later (N/2) L CCEs constitute a third PDCCH candidate, wherein the third PDCCH candidate is different from scrambling and/or interleaving of the second PDCCH candidate; or alternatively
The first (N/2) L CCEs constitute a third PDCCH candidate and the later (N/2) L CCEs constitute a second PDCCH candidate, wherein the third PDCCH candidate is different from scrambling and/or interleaving of the second PDCCH candidate.
26. The apparatus of claim 22 or 23, wherein the first PDCCH candidate is in a common search space.
27. The apparatus according to claim 22 or 23, wherein the transceiving unit is further configured to send an indication to the UE to detect a first PDCCH candidate.
28. The apparatus of claim 27, wherein the indication of detecting the first PDCCH candidate is at least one of MBMS primary information blocks carried by a physical broadcast channel, PBCH.
29. The device for detecting the Physical Downlink Control Channel (PDCCH) is characterized by comprising a processor and a memory, wherein the processor is coupled with the memory;
a memory for storing a computer program;
a processor for executing a computer program stored in the memory to cause the apparatus to perform the method of any one of claims 1-14.
30. A computer readable storage medium comprising a program or instructions which, when run on a computer, performs the method of any of claims 1-14.
31. A chip, characterized in that the chip is coupled to a memory for reading and executing program instructions stored in the memory for performing the method of any of claims 1-14.
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