CN116865912A - Method and system for blind detection control and early stopping of physical layer downlink control channel - Google Patents

Method and system for blind detection control and early stopping of physical layer downlink control channel Download PDF

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Publication number
CN116865912A
CN116865912A CN202311126614.XA CN202311126614A CN116865912A CN 116865912 A CN116865912 A CN 116865912A CN 202311126614 A CN202311126614 A CN 202311126614A CN 116865912 A CN116865912 A CN 116865912A
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blind detection
rnti
pdcch
early
blind
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CN116865912B (en
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曾锦
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Xinmai Micro Semiconductor Shanghai Co ltd
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Xinmai Micro Semiconductor Shanghai 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
    • H04L1/0001—Systems modifying transmission characteristics according to link quality, e.g. power backoff
    • H04L1/0036—Systems modifying transmission characteristics according to link quality, e.g. power backoff arrangements specific to the receiver
    • H04L1/0038—Blind format detection
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W52/00—Power management, e.g. TPC [Transmission Power Control], power saving or power classes
    • H04W52/02—Power saving arrangements
    • H04W52/0209—Power saving arrangements in terminal devices
    • H04W52/0225—Power saving arrangements in terminal devices using monitoring of external events, e.g. the presence of a signal
    • H04W52/0229—Power saving arrangements in terminal devices using monitoring of external events, e.g. the presence of a signal where the received signal is a wanted signal
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02D—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN INFORMATION AND COMMUNICATION TECHNOLOGIES [ICT], I.E. INFORMATION AND COMMUNICATION TECHNOLOGIES AIMING AT THE REDUCTION OF THEIR OWN ENERGY USE
    • Y02D30/00—Reducing energy consumption in communication networks
    • Y02D30/70—Reducing energy consumption in communication networks in wireless communication networks

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

Abstract

The application provides a method and a system for blind detection control and early stopping of a physical layer downlink control channel. The method comprises the following steps: and grouping all RNTIs to be detected according to the Search Space type and the DCI Payload Size, wherein the types and the numbers of the RNTIs to be detected are determined in a group of combined fields of the Search Space and the DCI Payload Size, and the blind detection control detects according to the sequence of the combined fields. Based on logic of blind detection control, if all RNTI in a certain combination domain are detected, early-stop operation can be started, and the blind detection of the current combination domain is exited, so that the occurrence of invalid blind detection is reduced.

Description

Method and system for blind detection control and early stopping of physical layer downlink control channel
Technical Field
The application belongs to the field of mobile communication, and particularly relates to a method and a system for blind detection control and early stopping of a physical layer downlink control channel.
Background
In an LTE (Long-Term Evolution) mobile communication system, DCI (Downlink Control information ) information related to uplink and downlink scheduling and other control is transmitted through a PDCCH (Physical Downlink Control Channel, physical layer downlink control channel), and according to the difference of the bearer information, a plurality of different DCI formats are defined, including DCI formats 0, 1A, 1B, 1C, 1D, 2A, 2B, 2C, 2D, 3A, 4, 5, and the like, but in the same channel bandwidth and the same duplex mode, the payload sizes of different DCI formats are often different, and therefore may be distinguished by payload sizes, but there is also a case where the payload lengths of different DCI formats are the same, and the DCI formats of the same DCI payload length may be distinguished by a value of a part of fields or may be avoided from being distinguished by simultaneous transmission, which is specified in a 3GPP (3 rd Generation Partnership Project, third generation partnership project). Each PDCCH carries one DCI, identified by an RNTI (RNTI Radio Network Temporary Identity, radio network temporary identity), which may be transmitted by two different DCI formats at most. The PDCCH can only be sent in the control domain symbol range, the UE (User equipment) needs to monitor all possible candidate PDCCHs in the Search Space, the Search Space is divided into two types of CSS (Common Search Space, public Search Space) and USS (UE-Special Search Space, UE-specific Search Space), the CSS carries DCI common to all UEs, the USS carries UE-specific DCI, the UE monitors the CSS using aggregation levels 4 and 8, monitors the USS using all aggregation levels (1, 2, 4 and 8), and the number of candidate PDCCHs under different aggregation levels in different Search spaces can be different. The UE needs to monitor all possible PDCCH candidates in the search space according to all possible RNTIs to perform blind detection on DCI, and the complexity of the receiving scenario is still a great challenge for blind detection capability and power consumption control of the UE, although the aggregation level and the number of PDCCH candidates of each aggregation level are limited in the protocol.
Prior Art
The DCI needs to be detected by a blind detection method, for a specific RNTI, the positions of candidate PDCCHs in all relevant search spaces need to be detected until the DCI is detected, and for another RNTI, the relevant search space may overlap with the current RNTI, so even if the DCI identified by the specific RNTI is detected, all candidate PDCCHs in the search space need to be completely traversed, no effective method exists to exit the blind detection process in advance, which definitely prolongs the blind detection time, and the problem of increased power consumption caused by ineffective blind detection exists.
Disclosure of Invention
In order to solve the technical problems, the application provides a technical scheme of a method for blind detection control and early stopping of a physical layer downlink control channel, so as to solve the technical problems.
The first aspect of the application discloses a method for blind detection control and early stopping of a physical layer downlink control channel, which comprises the following steps:
s1, grouping RNTI which needs blind detection in a current subframe;
s2, sorting PDCCH according to the RNTI type after sorting the RNTI; counting and accumulating the number of PDCCHs in each group according to the classified PDCCH types;
s3, performing blind detection on the PDCCH in the corresponding Search Space according to the grouping sequence; subtracting 1 from a non-0 count value of the PDCCH types corresponding to all the groups when one DCI is detected;
and S4, detecting the count value of each group, if all the count values in a certain group are 0, closing the blind detection enabling of the group, and exiting the subsequent blind detection of the group in advance to perform early stop operation.
According to the method of the first aspect of the present application, in the step S1, the method for grouping RNTIs that need blind detection for a current subframe includes:
and grouping RNTI requiring blind detection of the current subframe according to the Search Space type and the DCI Payload Size.
According to the method of the first aspect of the present application, in the step S2, the method for classifying the PDCCH according to the RNTI type includes:
and dividing the PDCCH into two PDCCH types of a Common-PDCCH and a UE-PDCCH according to the RNTI type for the grouped RNTI. Specifically, the RNTI types corresponding to the Common-PDCCH include SI-RNTI, P-RNTI, RA-RNTI, TPC-PUCCH-RNTI, TPC-PUSCH-RNTI and the like, and the RNTI types corresponding to the UE-PDCCH include C-RNTI, TC-RNTI, SPS-C-RNTI and the like.
According to the method of the first aspect of the present application, in the step S4, the method further comprises:
if all the group blind test enabling is closed, exiting the whole blind test flow in advance, and respectively carrying out blind test enabling control by taking the group as a unit.
The second aspect of the application discloses a system for blind detection control and early stopping of a physical layer downlink control channel, which comprises:
the first processing module is configured to group RNTI requiring blind detection in the current subframe;
the second processing module is configured to classify the PDCCH according to the RNTI type after the packet is formed; counting and accumulating the number of PDCCHs in each group according to the classified PDCCH types;
the third processing module is configured to perform blind detection on the PDCCH in the corresponding Search Space according to the grouping sequence; subtracting 1 from a non-0 count value of the PDCCH types corresponding to all the groups when one DCI is detected;
and the fourth processing module is configured to detect the count value of each packet, close the blind detection enabling of the packet if all count values in a certain packet are 0, and exit the subsequent blind detection of the packet in advance to perform early-stop operation.
According to the system of the second aspect of the present application, the method for grouping the RNTI requiring blind detection of the current subframe includes:
and grouping RNTI requiring blind detection of the current subframe according to the Search Space type and the DCI Payload Size.
According to the system of the second aspect of the present application, the method for classifying the PDCCH according to the RNTI type after the packet comprises:
and dividing the PDCCH into two PDCCH types of a Common-PDCCH and a UE-PDCCH according to the RNTI type for the grouped RNTI.
The system according to the second aspect of the present application, the system further comprising:
if all the group blind test enabling is closed, exiting the whole blind test flow in advance, and respectively carrying out blind test enabling control by taking the group as a unit.
A third aspect of the application discloses an electronic device. The electronic device comprises a memory and a processor, the memory stores a computer program, and the processor implements the steps in a method for blind detection control and early stop of a physical layer downlink control channel according to any one of the first aspects of the disclosure when executing the computer program.
A fourth aspect of the application discloses a computer-readable storage medium. A computer readable storage medium has stored thereon a computer program which, when executed by a processor, implements the steps in a method for blind detection control and early-stop of a physical layer downlink control channel of any one of the first aspects of the present disclosure.
In summary, the scheme provided by the application can avoid the operation of completely traversing all candidate PDCCHs in the search space in the prior art, reduce the total searching times in the whole blind detection process and reduce the occurrence probability of invalid blind detection; and the counting control is finer, the integral delay of the blind detection process is greatly reduced, and the power consumption is further reduced.
Drawings
In order to more clearly illustrate the embodiments of the present application or the technical solutions in the prior art, the drawings that are needed in the description of the embodiments or the prior art will be briefly described, and it is obvious that the drawings in the description below are some embodiments of the present application, and other drawings can be obtained according to the drawings without inventive effort for a person skilled in the art.
Fig. 1 is a flowchart of a method for blind detection control and early-stop of a physical layer downlink control channel according to an embodiment of the present application;
fig. 2 is a block diagram of a system for blind detection control and early-stop of a physical layer downlink control channel according to an embodiment of the present application;
fig. 3 is a block diagram of an electronic device according to an embodiment of the present application.
Detailed Description
For the purpose of making the objects, technical solutions and advantages of the embodiments of the present application more apparent, the technical solutions of the embodiments of the present application will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present application, and it is apparent that the described embodiments are only some embodiments of the present application, not all embodiments of the present application. All other embodiments, which can be made by those skilled in the art based on the embodiments of the application without making any inventive effort, are intended to be within the scope of the application.
The first aspect of the application discloses a method for blind detection control and early stopping of a physical layer downlink control channel. Fig. 1 is a flowchart of a method for blind detection control and early-stop of a physical layer downlink control channel according to an embodiment of the present application, as shown in fig. 1, where the method includes:
s1, grouping RNTI which needs blind detection in a current subframe;
s2, sorting PDCCH according to the RNTI type after sorting the RNTI; counting and accumulating the number of PDCCHs in each group according to the classified PDCCH types;
s3, performing blind detection on the PDCCH in the corresponding Search Space according to the grouping sequence; subtracting 1 from a non-0 count value of the PDCCH types corresponding to all the groups when one DCI is detected;
and S4, detecting the count value of each group, if all the count values in a certain group are 0, closing the blind detection enabling of the group, and exiting the subsequent blind detection of the group in advance to perform early stop operation.
In step S1, the RNTI requiring blind detection for the current subframe is grouped.
In some embodiments, in the step S1, the method for grouping RNTIs that need blind detection for the current subframe includes:
and grouping RNTI requiring blind detection of the current subframe according to the Search Space type and the DCI Payload Size.
Specifically, for a specific RNTI, the 3GPP protocol limits its Search Space type and DCI format, where a part of RNTI types can only be blindly detected in the CSS, such as SI-RNTI, P-RNTI, etc., and a part of RNTI types can be blindly detected in both the CSS and USS, such as C-RNTI, SPS C-RNTI, etc.; there is also a certain limitation on the DCI Format of a specific RNTI that needs to be blindly detected in a certain Search Space, and the limitation conditions of different RNTI types are inconsistent, for example, SI-RNTI needs to be blindly detected simultaneously for DCI Format 1C and DCI Format 1A in CSS, while C-RNTI may only need to be blindly detected for DCI Format 1A (or DCI Format 0) in CSS, and may need to be blindly detected simultaneously for DCI Format 1A (or DCI Format 0) and DCI Format related to the scheduled PDSCH transmission mode in USS. Each DCI format corresponds to one DCI Payload Size, and as described in the background art, DCI formats of the same DCI Payload Size may be combined. So far, based on the current subframe blind detection RNTI type, the Search Space type to be searched and the DCI Payload Size in each Search Space can be determined, grouping is carried out according to the Search Space type and the DCI Payload Size, and the RNTI needing blind detection in each group can be uniquely determined.
Step S2, classifying PDCCH according to the RNTI type after the packet is formed; and counting and accumulating the number of PDCCHs in each group according to the classified PDCCH types.
In some embodiments, in the step S2, the method for classifying the PDCCH according to the RNTI type includes:
and dividing the PDCCH into two PDCCH types of a Common-PDCCH and a UE-PDCCH according to the RNTI type for the grouped RNTI. Specifically, the RNTI types corresponding to the Common-PDCCH include SI-RNTI, P-RNTI, RA-RNTI, TPC-PUCCH-RNTI, TPC-PUSCH-RNTI and the like, and the RNTI types corresponding to the UE-PDCCH include C-RNTI, TC-RNTI, SPS-C-RNTI and the like.
In particular, it may be necessary to detect twice for the type of RNTI such as C-RNTI, and only once for the type of RNTI such as SI-RNTI. After analyzing the type of RNTI that may be blindly detected in the current subframe, the count values in all packets may be obtained, as shown in table 1.
TABLE 1
Step S3, performing blind detection on the PDCCH in the corresponding Search Space according to the grouping sequence; and each time one piece of DCI is detected, subtracting 1 from a non-0 count value of the PDCCH types corresponding to all the packets.
Specifically, for example, SI-RNTI is detected, it is necessary to decrement a, c, e, g by 1, while for the type of RNTI that can be detected only once, it is necessary to mask the subsequent related detection.
In step S4, the count value of each packet is detected, if all count values in a certain packet are 0, the blind detection enabling of the packet is closed, the subsequent blind detection of the packet is withdrawn in advance, and early-stop operation is performed, so that the occurrence of invalid blind detection in the prior art is reduced.
In some embodiments, in the step S4, the method further includes:
if all the group blind test enabling is closed, exiting the whole blind test flow in advance, and respectively carrying out blind test enabling control by taking the group as a unit.
In summary, the scheme provided by the application can avoid the operation of completely traversing all candidate PDCCHs in the search space in the prior art, reduce the total searching times in the whole blind detection process and reduce the occurrence probability of invalid blind detection; and the counting control is finer, the integral delay of the blind detection process is greatly reduced, and the power consumption is further reduced.
The second aspect of the application discloses a system for blind detection control and early stopping of a physical layer downlink control channel. Fig. 2 is a block diagram of a system for blind detection control and early-stop of a physical layer downlink control channel according to an embodiment of the present application; as shown in fig. 2, the system 100 includes:
a first processing module 101, configured to group RNTIs that need blind detection for a current subframe;
a second processing module 103 configured to classify the PDCCH according to the type of the RNTI; counting and accumulating the number of PDCCHs in each group according to the classified PDCCH types;
a third processing module 103, configured to perform blind detection on the PDCCH in the corresponding Search Space according to the grouping sequence; subtracting 1 from a non-0 count value of the PDCCH types corresponding to all the groups when one DCI is detected;
and a fourth processing module 104, configured to detect a count value of each packet, if all count values in a certain packet are 0, close the blind detection enabling of the packet, and exit the subsequent blind detection of the packet in advance, so as to perform early-stop operation.
According to the system of the second aspect of the present application, the first processing module 101 is specifically configured to perform the method for grouping RNTIs that need blind detection for a current subframe, where the method includes:
and grouping RNTI requiring blind detection of the current subframe according to the Search Space type and the DCI Payload Size.
Specifically, for a specific RNTI, the 3GPP protocol limits its Search Space type and DCI format, where a part of RNTI types can only be blindly detected in the CSS, such as SI-RNTI, P-RNTI, etc., and a part of RNTI types can be blindly detected in both the CSS and USS, such as C-RNTI, SPS C-RNTI, etc.; there is also a certain limitation on the DCI Format of a specific RNTI that needs to be blindly detected in a certain Search Space, and the limitation conditions of different RNTI types are inconsistent, for example, SI-RNTI needs to be blindly detected simultaneously for DCI Format 1C and DCI Format 1A in CSS, while C-RNTI may only need to be blindly detected for DCI Format 1A (or DCI Format 0) in CSS, and may need to be blindly detected simultaneously for DCI Format 1A (or DCI Format 0) and DCI Format related to the scheduled PDSCH transmission mode in USS. Each DCI format corresponds to one DCI Payload Size, and as described in the background art, DCI formats of the same DCI Payload Size may be combined. So far, based on the current subframe blind detection RNTI type, the Search Space type to be searched and the DCI Payload Size in each Search Space can be determined, grouping is carried out according to the Search Space type and the DCI Payload Size, and the RNTI needing blind detection in each group can be uniquely determined.
According to the system of the second aspect of the present application, the second processing module 102 is specifically configured to, the method for classifying the PDCCH according to the RNTI type after the packet includes:
and dividing the PDCCH into two PDCCH types of a Common-PDCCH and a UE-PDCCH according to the RNTI type for the grouped RNTI.
In particular, it may be necessary to detect twice for the type of RNTI such as C-RNTI, and only once for the type of RNTI such as SI-RNTI. After analyzing the type of RNTI that may be blindly detected in the current subframe, the count values in all packets may be obtained, as shown in table 1.
According to the system of the second aspect of the present application, the third processing module 103 is specifically configured, for example, to detect SI-RNTI, to decrement a, c, e, g by 1, while for RNTI types that can be detected only once, to mask its subsequent related detections.
According to the system of the second aspect of the present application, the fourth processing module 104 is specifically configured to, if all the group blind detection enabling is turned off, exit the whole blind detection process in advance, and perform blind detection enabling control by using the group as a unit.
A third aspect of the application discloses an electronic device. The electronic device comprises a memory and a processor, wherein the memory stores a computer program, and when the processor executes the computer program, the method for blind detection control and early stopping of a physical layer downlink control channel in any one of the first aspect of the disclosure is realized.
Fig. 3 is a block diagram of an electronic device according to an embodiment of the present application, and as shown in fig. 3, the electronic device includes a processor, a memory, a communication interface, a display screen, and an input device connected through a system bus. Wherein the processor of the electronic device is configured to provide computing and control capabilities. The memory of the electronic device includes a nonvolatile storage medium and an internal memory. The non-volatile storage medium stores an operating system and a computer program. The internal memory provides an environment for the operation of the operating system and computer programs in the non-volatile storage media. The communication interface of the electronic device is used for conducting wired or wireless communication with an external terminal, and the wireless communication can be achieved through WIFI, an operator network, near Field Communication (NFC) or other technologies. The display screen of the electronic equipment can be a liquid crystal display screen or an electronic ink display screen, and the input device of the electronic equipment can be a touch layer covered on the display screen, can also be keys, a track ball or a touch pad arranged on the shell of the electronic equipment, and can also be an external keyboard, a touch pad or a mouse and the like.
It will be appreciated by those skilled in the art that the structure shown in fig. 3 is merely a block diagram of a portion related to the technical solution of the present disclosure, and does not constitute a limitation of the electronic device to which the technical solution of the present disclosure is applied, and that a specific electronic device may include more or less components than those shown in the drawings, or may combine some components, or have different component arrangements.
A fourth aspect of the application discloses a computer-readable storage medium. The computer readable storage medium stores a computer program which, when executed by a processor, implements the steps in a method for blind detection control and early-stop of a physical layer downlink control channel according to any one of the first aspects of the present disclosure.
Note that the technical features of the above embodiments may be arbitrarily combined, and all possible combinations of the technical features in the above embodiments are not described for brevity of description, however, as long as there is no contradiction between the combinations of the technical features, they should be regarded as the scope of the description. The foregoing examples illustrate only a few embodiments of the application, which are described in detail and are not to be construed as limiting the scope of the application. It should be noted that it will be apparent to those skilled in the art that several variations and modifications can be made without departing from the spirit of the application, which are all within the scope of the application. Accordingly, the scope of protection of the present application is to be determined by the appended claims.

Claims (10)

1. A method for blind detection control and early-stop of a physical layer downlink control channel, the method comprising:
s1, grouping RNTI which needs blind detection in a current subframe;
s2, sorting PDCCH according to the RNTI type after sorting the RNTI; counting and accumulating the number of PDCCHs in each group according to the classified PDCCH types;
s3, performing blind detection on the PDCCH in the corresponding Search Space according to the grouping sequence; subtracting 1 from a non-0 count value of the PDCCH types corresponding to all the groups when one DCI is detected;
and S4, detecting the count value of each group, if all the count values in a certain group are 0, closing the blind detection enabling of the group, and exiting the subsequent blind detection of the group in advance to perform early stop operation.
2. The method for blind detection control and early-stop of a physical layer downlink control channel according to claim 1, wherein in the step S1, the method for grouping RNTIs that require blind detection for a current subframe includes:
and grouping RNTI requiring blind detection of the current subframe according to the Search Space type and the DCI Payload Size.
3. The method for blind detection control and early-stop of physical layer downlink control channel according to claim 1, wherein in the step S2, the method for classifying the PDCCH according to the RNTI type after the packet includes:
and dividing the PDCCH into two PDCCH types of a Common-PDCCH and a UE-PDCCH according to the RNTI type for the grouped RNTI.
4. The method for blind control and early-stop of physical layer downlink control channel according to claim 1, wherein in the step S4, the method further comprises:
if all the group blind test enabling is closed, exiting the whole blind test flow in advance, and respectively carrying out blind test enabling control by taking the group as a unit.
5. A system for physical layer downlink control channel blind detection control and early-stop, the system comprising:
the first processing module is configured to group RNTI requiring blind detection in the current subframe;
the second processing module is configured to classify the PDCCH according to the RNTI type after the packet is formed; counting and accumulating the number of PDCCHs in each group according to the classified PDCCH types;
the third processing module is configured to perform blind detection on the PDCCH in the corresponding Search Space according to the grouping sequence; subtracting 1 from a non-0 count value of the PDCCH types corresponding to all the groups when one DCI is detected;
and the fourth processing module is configured to detect the count value of each packet, close the blind detection enabling of the packet if all count values in a certain packet are 0, and exit the subsequent blind detection of the packet in advance to perform early-stop operation.
6. The system for blind detection control and early-stop of a physical layer downlink control channel according to claim 5, wherein the method for grouping RNTIs required for blind detection of a current subframe comprises:
and grouping RNTI requiring blind detection of the current subframe according to the Search Space type and the DCI Payload Size.
7. The system for blind detection control and early-stop of physical layer downlink control channel according to claim 5, wherein the method for classifying the PDCCH according to the RNTI type after the grouping comprises:
and dividing the PDCCH into two PDCCH types of a Common-PDCCH and a UE-PDCCH according to the RNTI type for the grouped RNTI.
8. The system for blind control and early-stop of a physical layer downlink control channel of claim 5, further comprising:
if all the group blind test enabling is closed, exiting the whole blind test flow in advance, and respectively carrying out blind test enabling control by taking the group as a unit.
9. An electronic device comprising a memory and a processor, the memory storing a computer program, the processor implementing the steps in a method for blind control and early-stop of a physical layer downlink control channel as claimed in any one of claims 1 to 4 when the computer program is executed.
10. A computer readable storage medium, wherein a computer program is stored on the computer readable storage medium, and when the computer program is executed by a processor, the steps in a method for blind detection control and early-stop of a physical layer downlink control channel according to any one of claims 1 to 4 are implemented.
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