CN110958094A - Configuration method, detection method and equipment of physical downlink control channel - Google Patents

Configuration method, detection method and equipment of physical downlink control channel Download PDF

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CN110958094A
CN110958094A CN201811132649.3A CN201811132649A CN110958094A CN 110958094 A CN110958094 A CN 110958094A CN 201811132649 A CN201811132649 A CN 201811132649A CN 110958094 A CN110958094 A CN 110958094A
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search space
serving cell
cell
index
pdcch
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CN110958094B (en
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杨拓
胡丽洁
夏亮
刘光毅
王启星
侯雪颖
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China Mobile Communications Group Co Ltd
China Mobile Communications Ltd Research Institute
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China Mobile Communications Ltd Research Institute
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    • HELECTRICITY
    • H04ELECTRIC COMMUNICATION TECHNIQUE
    • H04LTRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L5/00Arrangements affording multiple use of the transmission path
    • H04L5/0001Arrangements for dividing the transmission path
    • H04L5/0003Two-dimensional division
    • H04L5/0005Time-frequency
    • H04L5/0007Time-frequency the frequencies being orthogonal, e.g. OFDM(A), DMT
    • H04L5/001Time-frequency the frequencies being orthogonal, e.g. OFDM(A), DMT the frequencies being arranged in component carriers
    • HELECTRICITY
    • H04ELECTRIC COMMUNICATION TECHNIQUE
    • H04LTRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L5/00Arrangements affording multiple use of the transmission path
    • H04L5/003Arrangements for allocating sub-channels of the transmission path
    • H04L5/0053Allocation of signaling, i.e. of overhead other than pilot signals
    • HELECTRICITY
    • H04ELECTRIC COMMUNICATION TECHNIQUE
    • H04LTRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L5/00Arrangements affording multiple use of the transmission path
    • H04L5/0091Signaling for the administration of the divided path
    • H04L5/0094Indication of how sub-channels of the path are allocated

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Abstract

The embodiment of the invention provides a configuration method, a detection method and equipment of a physical downlink control channel. The embodiment of the invention can reduce or avoid the related problems caused by the inconsistency of understanding the PDCCH configuration, improve the success rate of PDCCH detection and improve the system performance.

Description

Configuration method, detection method and equipment of physical downlink control channel
Technical Field
The embodiment of the invention relates to the technical field of communication, in particular to a configuration method, a detection method and equipment of a physical downlink control channel.
Background
In a Downlink Control CHannel of a New-generation communication technology New Radio (5G NR), a Physical Downlink Control CHannel (PDCCH) is configured by two parts, namely a Control resource SET (core SET) and a search space SET (search space SET). The CORESET mainly configures the resource position of the PDCCH, including frequency domain resources, a resource mapping mode, the size of resource element group bundling (REG bundle), and the like. The search space set mainly configures a detection period, a detection offset value, a detection time length, aggregation levels, the number of PDCCH candidate sets of each aggregation level, and the like of the search space set.
Under carrier aggregation, cross-carrier scheduling is supported, a specific high-level signaling configures whether the serving cell is a scheduling cell or a scheduled cell, and if the serving cell is the scheduled cell, the scheduling cell ID and a value in a Carrier Indicator Field (CIF) of the scheduling cell are further configured.
For a cross-carrier scheduled cell, a terminal (UE) detects in a search space in CORESET corresponding to the scheduled cell. When detecting the PDCCH of the scheduling cell, the index offset value of the control-channel element (CCE) detected by the UE does not need to be added with a cell indicator, and when detecting the PDCCH of the scheduling cell, the index value of the CCE detected by the UE needs to be added with a CIF value configured at a high layer, a specific formula for detecting the CCE index by the UE is as follows, n isCIThe value of the carrier indicator of cross-carrier scheduling configured at a higher layer is also referred to herein as the carrier indicator for convenience of description.
The terminal is in the time slot of
Figure BDA0001813946620000011
Detecting carrier indicator n in CORESET with index p associated with search space set with index sCIAggregation level L of PDCCH candidates
Figure BDA0001813946620000012
The CCE index of (a) is:
Figure BDA0001813946620000021
wherein for a common search space
Figure BDA0001813946620000022
For UE specific search spaces
Figure BDA0001813946620000023
Yp,-1=nRNTINot equal to 0, pmod3 is 0039827, pmod3 ═ 1, A139829, pmod 32 a2=39839,D=65537;
i=0,…,L-1;
NCCE,pIs the total CCE number of CORESET p;
nCIis a carrier indicator for cross-carrier scheduling of high level configuration, for any common search space nCI=0.
Figure BDA0001813946620000024
Wherein
Figure BDA0001813946620000025
Is configured for the UE corresponding to nCIThe number of PDCCH candidate sets with aggregation level L on a search space set S on the serving cell;
for any common search space
Figure BDA0001813946620000026
For UE specific search spaces
Figure BDA0001813946620000027
All n configured for a UECIIn the serving cell of (2), the maximum value of the number of PDCCH candidate sets with aggregation level L in the search space set S in the CORESET p.
Since each serving cell is configured with its own CORESET and search space configuration at the time of current cross-carrier scheduling. And simultaneously, whether each serving cell is a self-scheduling cell or a scheduled cell is reconfigured, and if the serving cell is the scheduled cell, the ID of the scheduling cell and the CIF value of the scheduling cell are further configured. The UE thus knows which cells are scheduling cells, which scheduled cells can be scheduled by the scheduling cell.
However, since the scheduling cell and the scheduled cell are configured with CORESET and search space separately, there are two cases of mismatch. For example, when the search space is configured, the detection period and offset value thereof are configured. For a search space set with index s in a control resource set with index p, if the following formula is satisfied
Figure BDA0001813946620000028
The terminal judges that the PDCCH detection opportunity occurs in a frame number nfHas a time slot number of
Figure BDA0001813946620000029
Within the time slot of (a). Wherein k isp,sIs the detection period of the search space set s; op,sIs the detection offset value for the search for the empty set s;
Figure BDA00018139466200000210
is the number of slots (slots) in each radio frame (frame) in a configuration with a subcarrier spacing of μ.
If the cells are cells with different subcarrier intervals, the detection time slot is calculated according to the formula
Figure BDA0001813946620000031
The different subcarrier intervals are different, and if the base station understands according to the subcarrier interval of the scheduling cell and the UE understands according to the subcarrier interval of the scheduled cell, inconsistency between the base station and the UE occurs, which results in PDCCH detection errors.
Another situation is that if the CORESET configurations are different, for example, the symbol length of the scheduling cell CORESET #1 is 2, the symbol length of the scheduled cell CORESET #1 is 3, the UE determines its CCE index according to the CORESET with the symbol length of 3, and the base station schedules the UE according to the CORESET with the symbol length of 2, which may increase the collision probability between CCEs and reduce the number of UEs that can be multiplexed by the PDCCH.
It may also be the case that, since the configuration of the CORESET is based on the BWP where the CORESET is located, the BWP configuration and the active BWP configuration of each serving cell may be different, and the signaling of the configuration is different on different BWPs for the same CORESET frequency domain resource allocation. For example, if the UE detects the PDCCH according to the configuration of CORESET #1 on BWP #1 of the scheduled cell, but BWP #1 may not be activated in the scheduling cell, or the configuration of BWP #1 of the scheduling cell is different from that of the scheduled cell, the UE may not find CORESET #1 on the scheduling cell or find the frequency domain position of CORESET #1 is wrong, which may increase the collision probability between CCEs, decrease the number of UEs that the PDCCH can multiplex, or even the UE may not detect the PDCCH.
Therefore, a solution is needed to reduce the PDCCH detection failure or the system performance low caused by the inconsistency of the PDCCH configuration understanding in the cross-carrier scheduling.
Disclosure of Invention
An object of the embodiments of the present invention is to provide a method, a device, and a method for configuring a physical downlink control channel, so as to reduce or avoid a PDCCH detection failure or a low system performance caused by inconsistency of PDCCH configuration understanding.
The embodiment of the invention provides a method for configuring a Physical Downlink Control Channel (PDCCH), which comprises the following steps:
a network side configures cross-carrier scheduling information for a terminal; wherein the cross-carrier scheduling information comprises at least one of the following information:
whether a carrier indicator field is configured in a Downlink Control Information (DCI) format of a Physical Downlink Control Channel (PDCCH) of a serving cell;
an index of a scheduling cell of the serving cell and a value of a carrier indicator field of the serving cell in a PDCCH DCI format of the scheduling cell;
the index of the scheduled cell scheduled by the serving cell and the value of the carrier indicator field of the scheduled cell in the PDCCHDCI format of the serving cell.
The embodiment of the invention also provides a method for detecting the PDCCH, which comprises the following steps:
the terminal detects PDCCH candidates, wherein, in a control resource set CORESET with index p associated with a search space set with index s, a carrier indicator nCIPDCCH candidate with aggregation level L in corresponding serving cell
Figure BDA0001813946620000041
The CCE index of (c) is:
Figure BDA0001813946620000042
wherein the content of the first and second substances,
Figure BDA0001813946620000043
representing search space related parameters;
NCCE,ptotal CCE number of CORESET p;
Figure BDA0001813946620000044
represents nCISearching the number of PDCCH candidates with the aggregation level L of the space set s in the CORESET p of the serving cell of 0;
when the carrier indicator field is configured in the high-layer signaling, the nCITaking the value of the carrier indicator field, otherwise, including any common search space, nCIThe value is 0;
the value range of i is 0-L-1.
The embodiment of the invention also provides a method for configuring the PDCCH, which comprises the following steps:
a network side configures configuration information of a search space of a service cell for a terminal, wherein the configuration information of the search space comprises cross-carrier scheduling information, and the cross-carrier scheduling information comprises at least one of the following information:
whether a carrier indicator field is configured in a PDCCH DCI format corresponding to the search space;
the index of the scheduled cell scheduled by the serving cell corresponding to the search space;
and the value of the carrier indicator field of the PDCCH DCI format corresponding to the search space of the serving cell of the scheduled cell.
The embodiment of the invention also provides a method for detecting the PDCCH, which comprises the following steps:
the terminal detects the PDCCH of a serving cell, wherein in a control resource set CORESET with index p associated with a search space set with index s, a carrier indicator field nCIPDCCH candidate with aggregation level L in corresponding serving cell
Figure BDA0001813946620000051
The CCE index of (c) is:
Figure BDA0001813946620000052
wherein the content of the first and second substances,
Figure BDA0001813946620000053
representing search space related parameters;
NCCE,ptotal CCE number of CORESET p;
Figure BDA0001813946620000054
represents nCISearching the number of PDCCH candidates with the aggregation level L of the space set s in the CORESET p of the serving cell of 0;
when the carrier indicator field is configured in the high-layer signaling, the nCITaking the value as the value of the carrier indicator field, otherwise, the nCIThe value is 0;
the value range of i is 0-L-1.
The embodiment of the invention also provides a method for configuring the PDCCH, which comprises the following steps:
a network side configures configuration information of a search space of a service cell for a terminal, wherein the configuration information of the search space comprises cross-carrier scheduling information, and the cross-carrier scheduling information comprises at least one of the following information:
whether a carrier indicator field is configured in a PDCCH DCI format corresponding to the search space;
the index of the scheduled cell scheduled by the serving cell corresponding to the search space;
the value of the carrier indicator field in the PDCCH DCI format corresponding to the search space of the serving cell of the scheduled cell;
the configuration information of the search space for configuring the service cell for the terminal at the network side further comprises a search space index, wherein the same search space index corresponds to the value of at least one carrier indicator field, and the search spaces corresponding to the same carrier indicator and the same search space index have the same configuration.
The embodiment of the invention also provides a method for detecting the PDCCH, which comprises the following steps:
the terminal detects the PDCCH of a serving cell, wherein in a control resource set CORESET with index p associated with a search space set with index s, a carrier indicator field nCIPDCCH candidate with aggregation level L in corresponding serving cell
Figure BDA0001813946620000055
The CCE index of (c) is:
Figure BDA0001813946620000061
wherein the content of the first and second substances,
Figure BDA0001813946620000062
representing search space related parameters;
NCCE,ptotal CCE number of CORESET p;
with respect to the common search space,
Figure BDA0001813946620000063
for a user-specific search space,
Figure BDA0001813946620000064
all n configured for a terminalCIIn the serving cell of (1), searching for the maximum value of the number of PDCCH candidates with aggregation level L in the space set s in CORESET p; wherein the content of the first and second substances,
Figure BDA0001813946620000065
represents nCISearching the number of PDCCH candidates with the aggregation level L of the space set s in the CORESET p of the serving cell of 0;
when the carrier indicator field is configured in the high-layer signaling, the nCITaking the value as the value of the carrier indicator field, otherwise, the nCIThe value is 0;
the value range of i is 0-L-1.
And the terminal determines the association relationship between the search space of the scheduled cell and the CORESET according to the association relationship between the search space in the scheduling cell and the CORESET configured by the high-level signaling.
And the terminal detects the PDCCH of the scheduled cell according to the CORESET configuration in the scheduling cell configured by the high-level signaling.
The embodiment of the invention also provides a method for detecting the PDCCH, which comprises the following steps:
the terminal detects the PDCCH of the serving cell, wherein for a search space set with an index of s in a control resource set with an index of p, a formula is satisfied
Figure BDA0001813946620000066
Then, the terminal judges that the PDCCH detection opportunity occurs in a frame number nfAnd the time slot number is
Figure BDA0001813946620000067
Within a time slot of (c);
mu is a subcarrier interval of a control resource set with index p of a scheduling cell;
kp,sdetection period for search space set s, op,sIs the detection offset value for the search for the empty set s;
Figure BDA0001813946620000068
the number of time slots in each radio frame in a configuration with a subcarrier spacing of mu.
An embodiment of the present invention further provides a network side device, including:
a configuration unit, configured to configure cross-carrier scheduling information for a terminal; wherein the cross-carrier scheduling information comprises at least one of the following information:
whether a carrier indicator field is configured in a Downlink Control Information (DCI) format of a Physical Downlink Control Channel (PDCCH) of a serving cell;
an index of a scheduling cell of the serving cell and a value of a carrier indicator field of the serving cell in a PDCCH DCI format of the scheduling cell;
the index of the scheduled cell scheduled by the serving cell and the value of the carrier indicator field of the scheduled cell in the PDCCHDCI format of the serving cell.
An embodiment of the present invention further provides a terminal, including:
a detecting unit, configured to detect a PDCCH candidate, where a carrier indicator n is in a control resource set CORESET with index p associated with a search space set with index sCIPDCCH candidate with aggregation level L in corresponding serving cell
Figure BDA0001813946620000071
The CCE index of (c) is:
Figure BDA0001813946620000072
wherein the content of the first and second substances,
Figure BDA0001813946620000073
representing search space related parameters;
NCCE,ptotal CCE number of CORESET p;
Figure BDA0001813946620000074
represents nCISearch space set in CORESET p of serving cell of 0The number of PDCCH candidates with an aggregate level L;
when a carrier indicator field of a serving cell in a PDCCH DCI format of a scheduling cell is configured, the nCITaking the value of the carrier indicator field, otherwise, including any common search space, nCIThe value is 0;
the value range of i is 0-L-1.
An embodiment of the present invention further provides a network side device, including:
a configuration unit, configured to configure configuration information of a search space of a serving cell for a terminal, where the configuration information of the search space includes cross-carrier scheduling information, and the cross-carrier scheduling information includes at least one of the following information:
whether a carrier indicator field is configured in a PDCCH DCI format corresponding to the search space;
the index of the scheduled cell scheduled by the serving cell corresponding to the search space;
and the value of the carrier indicator field of the PDCCH DCI format corresponding to the search space of the serving cell of the scheduled cell.
An embodiment of the present invention further provides a terminal, including:
a detecting unit, configured to detect a PDCCH of a serving cell, where in a control resource set CORESET with an index p associated with a search space set with an index s, a carrier indicator field n is includedCIPDCCH candidate with aggregation level L in corresponding serving cell
Figure BDA0001813946620000081
The CCE index of (c) is:
Figure BDA0001813946620000082
wherein the content of the first and second substances,
Figure BDA0001813946620000083
representing search space related parameters;
NCCE,ptotal CCE number of CORESET p;
Figure BDA0001813946620000084
represents nCISearching the number of PDCCH candidates with the aggregation level L of the space set s in the CORESET p of the serving cell of 0;
when the carrier indicator field is configured in the high-layer signaling, the nCITaking the value as the value of the carrier indicator field, otherwise, the nCIThe value is 0;
the value range of i is 0-L-1.
An embodiment of the present invention further provides a network side device, including:
a configuration unit, configured to configure configuration information of a search space of a serving cell for a terminal, where the configuration information of the search space includes cross-carrier scheduling information, and the cross-carrier scheduling information includes at least one of the following information:
whether a carrier indicator field is configured in a PDCCH DCI format corresponding to the search space;
the index of the scheduled cell scheduled by the serving cell corresponding to the search space;
the value of the carrier indicator field in the PDCCH DCI format corresponding to the search space of the serving cell of the scheduled cell;
the configuration information of the search space for configuring the service cell for the terminal at the network side further comprises a search space index, wherein the same search space index corresponds to the value of at least one carrier indicator field, and the search spaces corresponding to the same carrier indicator and the same search space index have the same configuration.
An embodiment of the present invention further provides a terminal, including:
a detecting unit, configured to detect a PDCCH of a serving cell, where in a control resource set CORESET with an index p associated with a search space set with an index s, a carrier indicator field n is includedCIPDCCH candidate with aggregation level L in corresponding serving cell
Figure BDA0001813946620000085
The CCE index of (c) is:
Figure BDA0001813946620000091
wherein the content of the first and second substances,
Figure BDA0001813946620000092
representing search space related parameters;
NCCE,ptotal CCE number of CORESET p;
with respect to the common search space,
Figure BDA0001813946620000093
for a user-specific search space,
Figure BDA0001813946620000094
all n configured for a terminalCIIn the serving cell of (1), searching for the maximum value of the number of PDCCH candidates with aggregation level L in the space set s in CORESET p; wherein the content of the first and second substances,
Figure BDA0001813946620000095
represents nCISearching the number of PDCCH candidates with the aggregation level L of the space set s in the CORESET p of the serving cell of 0;
when the carrier indicator field is configured in the high-layer signaling, the nCITaking the value as the value of the carrier indicator field, otherwise, the nCIThe value is 0;
the value range of i is 0-L-1.
And the terminal determines the association relationship between the search space of the scheduled cell and the CORESET according to the association relationship between the search space in the scheduling cell and the CORESET configured by the high-level signaling.
And the terminal detects the PDCCH of the scheduled cell according to the CORESET configuration in the scheduling cell configured by the high-level signaling.
An embodiment of the present invention further provides a terminal, including:
detection unit for detecting servicePDCCH of a cell, wherein a search space set with index s in a control resource set with index p satisfies a formula
Figure BDA0001813946620000096
Then, the terminal judges that the PDCCH detection opportunity occurs in a frame number nfAnd the time slot number is
Figure BDA0001813946620000097
Within a time slot of (c);
mu is a subcarrier interval of a control resource set with index p of a scheduling cell;
kp,sdetection period for search space set s, op,sIs the detection offset value for the search for the empty set s;
Figure BDA0001813946620000098
the number of time slots in each radio frame in a configuration with a subcarrier spacing of mu.
An embodiment of the present invention further provides a communication device, including: the present invention relates to a method for configuring or detecting a physical downlink control channel, and a computer program stored in a memory and executable on a processor, where the method for configuring or detecting a physical downlink control channel is implemented as described above.
An embodiment of the present invention further provides a computer-readable storage medium, where a computer program is stored on the computer-readable storage medium, and when the computer program is executed by a processor, the steps of the configuration method or the detection method for the physical downlink control channel are implemented as described above.
The configuration method, the detection method and the equipment for the physical downlink control channel provided by the embodiment of the invention can reduce or avoid the related problems caused by the inconsistency of understanding of the PDCCH configuration, improve the success rate of PDCCH detection and improve the system performance.
Drawings
Various other advantages and benefits will become apparent to those of ordinary skill in the art upon reading the following detailed description of the preferred embodiments. The drawings are only for purposes of illustrating the preferred embodiments and are not to be construed as limiting the invention. Also, like reference numerals are used to refer to like parts throughout the drawings. In the drawings:
fig. 1 is a schematic view of an application scenario according to an embodiment of the present invention;
fig. 2 is a flowchart of a PDCCH configuring method according to an embodiment of the present invention;
fig. 3 is a flowchart of a PDCCH configuring method according to another embodiment of the present invention;
fig. 4 is a flowchart of a PDCCH configuring method according to another embodiment of the present invention;
FIG. 5 is a flowchart illustrating a method for detecting a PDCCH according to another embodiment of the present invention;
fig. 6 is one of the structural diagrams of the network side device according to the embodiment of the present invention;
fig. 7 is a second structural diagram of a base network side device according to an embodiment of the present invention;
fig. 8 is one of the structural diagrams of a terminal of the embodiment of the present invention;
fig. 9 is a second structural diagram of a terminal according to an embodiment of the present invention.
Detailed Description
Exemplary embodiments of the present invention will be described in more detail below with reference to the accompanying drawings. While exemplary embodiments of the invention are shown in the drawings, it should be understood that the invention can be embodied in various forms and should not be limited to the embodiments set forth herein. Rather, these embodiments are provided so that this disclosure will be thorough and complete, and will fully convey the scope of the invention to those skilled in the art.
The terms first, second and the like in the description and in the claims of the present application are used for distinguishing between similar elements and not necessarily for describing a particular sequential or chronological order. It is to be understood that the data so used is interchangeable under appropriate circumstances such that the embodiments of the application described herein are, for example, capable of operation in sequences other than those illustrated or otherwise described herein. Furthermore, the terms "comprises," "comprising," and "having," and any variations thereof, are intended to cover a non-exclusive inclusion, such that a process, method, system, article, or apparatus that comprises a list of steps or elements is not necessarily limited to those steps or elements expressly listed, but may include other steps or elements not expressly listed or inherent to such process, method, article, or apparatus. In the description and in the claims "and/or" means at least one of the connected objects.
The techniques described herein are not limited to Long Time Evolution (LTE)/LTE Evolution (LTE-Advanced) systems, and may also be used for various wireless communication systems, such as Code Division Multiple Access (CDMA), Time Division Multiple Access (TDMA), Frequency Division Multiple Access (FDMA), Orthogonal Frequency Division Multiple Access (OFDMA), Single-carrier Frequency Division Multiple Access (SC-FDMA), and other systems. The terms "system" and "network" are often used interchangeably. CDMA systems may implement Radio technologies such as CDMA2000, Universal Terrestrial Radio Access (UTRA), and so on. UTRA includes Wideband CDMA (Wideband code division Multiple Access, WCDMA) and other CDMA variants. TDMA systems may implement radio technologies such as Global System for Mobile communications (GSM). The OFDMA system may implement radio technologies such as Ultra Mobile Broadband (UMB), evolved-UTRA (E-UTRA), IEEE 802.11(Wi-Fi), IEEE 802.16(WiMAX), IEEE 802.20, Flash-OFDM, etc. UTRA and E-UTRA are parts of the Universal Mobile Telecommunications System (UMTS). LTE and higher LTE (e.g., LTE-A) are new UMTS releases that use E-UTRA. UTRA, E-UTRA, UMTS, LTE-A, and GSM are described in documents from an organization named "third Generation partnership project" (3 GPP). CDMA2000 and UMB are described in documents from an organization named "third generation partnership project 2" (3GPP 2). The techniques described herein may be used for both the above-mentioned systems and radio technologies, as well as for other systems and radio technologies. However, the following description describes the NR system for purposes of example, and NR terminology is used in much of the description below, although the techniques may also be applied to applications other than NR system applications.
The following description provides examples and does not limit the scope, applicability, or configuration set forth in the claims. Changes may be made in the function and arrangement of elements discussed without departing from the spirit and scope of the disclosure. Various examples may omit, substitute, or add various procedures or components as appropriate. For example, the described methods may be performed in an order different than described, and various steps may be added, omitted, or combined. In addition, features described with reference to certain examples may be combined in other examples.
Referring to fig. 1, fig. 1 is a block diagram of a wireless communication system to which an embodiment of the present invention is applicable. The wireless communication system includes a terminal 11 and a network device 12. The terminal 11 may also be referred to as a user terminal or a User Equipment (UE), where the terminal 11 may be a Mobile phone, a Tablet Personal Computer (Tablet Personal Computer), a Laptop Computer (Laptop Computer), a Personal Digital Assistant (PDA), a Mobile Internet Device (MID), a Wearable Device (Wearable Device), or a vehicle-mounted Device, and the specific type of the terminal 11 is not limited in the embodiment of the present invention. The network device 12 may be a Base Station and/or a core network element, wherein the Base Station may be a 5G or later-version Base Station (e.g., a gNB, a 5G NR NB, etc.), or a Base Station in other communication systems (e.g., an eNB, a WLAN access point, or other access points, etc.), wherein the Base Station may be referred to as a node B, an evolved node B, an access point, a Base Transceiver Station (BTS), a radio Base Station, a radio Transceiver, a Basic Service Set (BSS), an Extended Service Set (ESS), a node B, an evolved node B (eNB), a home node B, a home evolved node B, a WLAN access point, a WiFi node, or some other suitable terminology in the field, as long as the same technical effect is achieved, the Base Station is not limited to a specific technical vocabulary, it should be noted that, in the embodiment of the present invention only takes the Base Station in the NR system as an example, but does not limit the specific type of base station.
The base stations may communicate with the terminals 11 under the control of a base station controller, which may be part of the core network or some of the base stations in various examples. Some base stations may communicate control information or user data with the core network through a backhaul. In some examples, some of the base stations may communicate with each other, directly or indirectly, over backhaul links, which may be wired or wireless communication links. A wireless communication system may support operation on multiple carriers (waveform signals of different frequencies). A multi-carrier transmitter can transmit modulated signals on the multiple carriers simultaneously. For example, each communication link may be a multi-carrier signal modulated according to various radio technologies. Each modulated signal may be transmitted on a different carrier and may carry control information (e.g., reference signals, control channels, etc.), overhead information, data, and so on.
The base station may communicate wirelessly with the terminal 11 via one or more access point antennas. Each base station may provide communication coverage for a respective coverage area. The coverage area of an access point may be divided into sectors that form only a portion of the coverage area. A wireless communication system may include different types of base stations (e.g., macro, micro, or pico base stations). The base stations may also utilize different radio technologies, such as cellular or WLAN radio access technologies. The base stations may be associated with the same or different access networks or operator deployments. The coverage areas of different base stations (including coverage areas of base stations of the same or different types, coverage areas utilizing the same or different radio technologies, or coverage areas belonging to the same or different access networks) may overlap.
The communication links in a wireless communication system may comprise an Uplink for carrying Uplink (UL) transmissions (e.g., from terminal 11 to network device 12) or a Downlink for carrying Downlink (DL) transmissions (e.g., from network device 12 to terminal 11). The UL transmission may also be referred to as reverse link transmission, while the DL transmission may also be referred to as forward link transmission. Downlink transmissions may be made using licensed frequency bands, unlicensed frequency bands, or both. Similarly, uplink transmissions may be made using licensed frequency bands, unlicensed frequency bands, or both.
< example one >
Referring to fig. 2, a method for configuring a PDCCH according to an embodiment of the present invention is applied to a network side, such as a base station, and includes:
step 21, configuring cross-carrier scheduling information for the terminal by the network side; wherein the cross-carrier scheduling information comprises at least one of the following information:
whether a carrier indicator field is configured in a Downlink Control Information (DCI) format of a Physical Downlink Control Channel (PDCCH) of a serving cell;
an index of a scheduling cell of the serving cell and a value of a carrier indicator field of the serving cell in a PDCCH DCI format of the scheduling cell;
the index of the scheduled cell scheduled by the serving cell and the value of the carrier indicator field of the scheduled cell in the PDCCHDCI format of the serving cell.
In this embodiment, when the serving cell is a scheduled cell in cross-carrier scheduling, the network side does not need to configure the configuration information of the control resource set and/or the search space of the serving cell for the terminal. When a serving cell is a scheduling cell in cross-carrier scheduling, a network side configures configuration information of a control resource set and/or a search space of the serving cell for a terminal, and in addition, the network side also configures cross-carrier scheduling information for the terminal, for example, the cross-carrier scheduling information is configured through a high-level signaling, and the cross-carrier scheduling information generally includes:
1) whether a carrier indicator field is configured in a PDCCH Downlink Control Information (DCI) format of a certain serving cell.
Generally, when the serving cell is a self-scheduling cell, a Carrier Indicator Field (CIF) does not need to be configured; when the serving cell is a scheduling cell or a scheduled cell in cross-carrier scheduling, a Carrier Indication Field (CIF) needs to be configured, the value of the CIF of the scheduling cell is usually default to 0, and for the scheduled cell, the value of the CIF is nonzero at this time.
2) The index of the scheduling cell of the serving cell and the value of the carrier indicator field of the serving cell in the PDCCHDCI format of the scheduling cell.
When the serving cell is a scheduled cell in cross-carrier scheduling, the index of the scheduling cell of the serving cell and the value (e.g., a non-zero value) of the carrier indicator field of the serving cell in the PDCCHDCI format of the scheduling cell may also be included in the cross-carrier configuration information.
3) The index of the scheduled cell scheduled by the serving cell and the value of the carrier indicator field of the scheduled cell in the PDCCHDCI format of the serving cell.
When the serving cell is a scheduling cell in cross-carrier scheduling, the index of a scheduled cell scheduled by the serving cell and the value (e.g., non-zero value) of the carrier indicator field of the scheduled cell in the PDCCH DCI format of the serving cell may also be included in the cross-carrier configuration information.
When the carrier indicator field is configured in the PDCCH DCI format of the serving cell, the value of the carrier indicator field is 0 for the scheduling of the serving cell.
Corresponding to the method shown in fig. 2, an embodiment of the present invention provides a method for detecting a PDCCH, which is applied to a terminal side, and the method includes:
step a1, the terminal detects PDCCH candidates, wherein, in the control resource set CORESET with index p associated with the search space set with index s, the carrier indicator nCIPDCCH candidate with aggregation level L in corresponding serving cell
Figure BDA0001813946620000141
The CCE index of (c) is:
Figure BDA0001813946620000142
wherein the content of the first and second substances,
Figure BDA0001813946620000151
representing search space related parameters;
NCCE,ptotal CCE number of CORESET p;
Figure BDA0001813946620000152
represents nCISearching the number of PDCCH candidates with the aggregation level L of the space set s in the CORESET p of the serving cell of 0;
when the carrier indicator field is configured in the high-layer signaling, the nCITaking the value of the carrier indicator field, otherwise, including any common search space, nCIThe value is 0;
the value range of i is 0-L-1.
In this embodiment of the present invention, the terminal may further receive cross-carrier scheduling information of a serving cell sent by a network side, where the cross-carrier scheduling information includes at least one of the following information:
whether a carrier indicator field is configured in a Downlink Control Information (DCI) format of a Physical Downlink Control Channel (PDCCH) of a serving cell;
an index of a scheduling cell of the serving cell and a carrier indicator of the serving cell in a PDCCH DCI format of the scheduling cell;
an index of a scheduled cell scheduled by the serving cell and a carrier indicator of the scheduled cell in a PDCCHDCI format of the serving cell.
Through the steps, the network side does not configure the control resource set and/or the configuration information of the search space of the scheduled cell for the terminal any more, so that the problem of inconsistent understanding of the network side and the terminal side caused by the fact that the scheduling cell and the scheduled cell are independently configured with CORESET and the search space is avoided, the PDCCH detection success rate can be improved, and the system performance is improved.
A specific example of embodiment one is provided below.
A network side configures a service cell 1 for a terminal to be self-carrier scheduling through high-level signaling, a service cell 2 supports cross-carrier scheduling, the configured service cell 2 can schedule a service cell 3, and n is correspondingly configuredCI3, also configure servletRegion 2 may schedule serving cell 4, corresponding to configuration nCI4. The higher layer signaling will only configure PDCCH on serving cell 1 and serving cell 2, and not on serving cells 3 and 4.
Accordingly, the terminal detects n only on the serving cell 1CIPDCCH of 0. On the serving cell 2, n is detected for all search spacesCIPDCCH of 0, extra detection of n for UE-specific search spaceCI3 and nCIPDCCH of 4. In detecting PDCCH, for nCI3 and nCIThe PDCCH with 4 has COREST and search space configured with n on the serving cell 2CIThe corresponding search space of 0 is the same as the configuration of CORESET.
< example two >
Referring to fig. 3, another PDCCH configuring method is further provided in an embodiment of the present invention, as shown in fig. 3, the method includes:
step 31, a network side configures configuration information of a search space of a serving cell for a terminal, where the configuration information of the search space includes cross-carrier scheduling information, and the cross-carrier scheduling information includes at least one of the following information:
whether a carrier indicator field is configured in a PDCCH DCI format corresponding to the search space;
the index of the scheduled cell scheduled by the serving cell corresponding to the search space;
and the value of the carrier indicator field of the PDCCH DCI format corresponding to the search space of the serving cell of the scheduled cell.
In this embodiment, when the serving cell is a scheduled cell in cross-carrier scheduling, the network side does not need to configure the configuration information of the control resource set and/or the search space of the serving cell for the terminal. When the service cell is a scheduling cell in cross-carrier scheduling, the network side configures the configuration information of the control resource set and/or the search space of the service cell for the terminal. When a serving cell is a scheduling cell in cross-carrier scheduling, and a network side configures configuration information of a search space of the serving cell for a terminal, cross-carrier scheduling information may be added to the configuration information of the search space of the serving cell, where the cross-carrier scheduling information may include the following items:
1) whether a carrier indicator field is configured in the PDCCH DCI format corresponding to the search space.
Generally, when the serving cell is a self-scheduling cell, a Carrier Indicator Field (CIF) does not need to be configured; when the serving cell is a scheduling cell or a scheduled cell in cross-carrier scheduling, a Carrier Indication Field (CIF) needs to be configured, the value of the CIF of the scheduling cell is usually default to 0, and for the scheduled cell, the value of the CIF is nonzero at this time.
2) The search space corresponds to an index of a scheduled cell scheduled by the serving cell.
When the serving cell is a scheduling cell in cross-carrier scheduling, the index of the scheduling cell of the serving cell may also be included in the cross-carrier configuration information.
3) And the value of the carrier indicator field of the PDCCH DCI format corresponding to the search space of the serving cell of the scheduled cell.
When the serving cell is a scheduling cell in cross-carrier scheduling, a value (e.g., a non-zero value) of a carrier indicator field of the serving cell in a PDCCH DCI format of the scheduling cell may also be included in the cross-carrier configuration information.
Optionally, the cross-carrier scheduling information added to the configuration information of the search space of the serving cell may carry all the contents in the cross-carrier scheduling information, or may also carry part of the contents. When only carrying part of the content in the cross-carrier scheduling, the remaining part of the content may be configured to the terminal in other manners, for example, configured by other existing or newly defined higher layer signaling, which is not specifically limited in this embodiment of the present invention.
In this embodiment, the same search space index of the serving cell corresponds to a value of at least one carrier indicator field, and search spaces corresponding to the same search space index of the serving cell have the same configuration, where the configuration of the search spaces generally includes a detection period, a detection offset value, a detection time length, an aggregation level of a search space set, and a number of PDCCH candidate sets per aggregation level. That is, one search space index of the serving cell corresponds to one search space configuration. The same search space index of the serving cell corresponds to a value of at least one carrier indicator field, and search spaces corresponding to the same search space index have the same configuration.
When the carrier indicator field is configured in the PDCCH DCI format of the serving cell, the value of the carrier indicator field is 0 for the scheduling of the serving cell.
Corresponding to the above method shown in fig. 3, an embodiment of the present invention provides a method for detecting a PDCCH, which is applied to a terminal side, and the method includes:
step b1, the terminal detects the PDCCH of the serving cell, wherein, in the control resource set CORESET with index p associated with the search space set with index s, the carrier indicator field nCIPDCCH candidate with aggregation level L in corresponding serving cell
Figure BDA0001813946620000174
The CCE index of (c) is:
Figure BDA0001813946620000171
wherein the content of the first and second substances,
Figure BDA0001813946620000172
representing search space related parameters;
NCCE,ptotal CCE number of CORESET p;
Figure BDA0001813946620000173
represents nCISearching the number of PDCCH candidates with the aggregation level L of the space set s in the CORESET p of the serving cell of 0;
when the carrier indicator field is configured in the high-layer signaling, the nCITaking the value as the value of the carrier indicator field, otherwise, the nCIThe value is 0;
the value range of i is 0-L-1.
In this embodiment of the present invention, the terminal may further receive configuration information of a search space of a serving cell, where the configuration information of the search space of the terminal includes cross-carrier scheduling information, and the cross-carrier scheduling information includes at least one of the following information:
whether a carrier indicator field is configured in a PDCCH DCI format corresponding to the search space;
the index of the scheduled cell scheduled by the serving cell corresponding to the search space;
and the value of the carrier indicator field of the PDCCH DCI format corresponding to the search space of the serving cell of the scheduled cell.
In this embodiment, the same search space index of the serving cell corresponds to a value of at least one carrier indicator field, and search spaces corresponding to the same search space index of the serving cell have the same configuration, where the configuration of the search spaces generally includes a detection period, a detection offset value, a detection time length, an aggregation level of a search space set, and a number of PDCCH candidate sets per aggregation level.
Through the steps, the network side does not configure the control resource set and/or the configuration information of the search space of the scheduled cell for the terminal any more, so that the problem of inconsistent understanding of the network side and the terminal side caused by the fact that the scheduling cell and the scheduled cell are independently configured with CORESET and the search space is avoided, the PDCCH detection success rate can be improved, and the system performance is improved.
A specific example of embodiment two is provided below.
The network side configures the search space1 of the service cell 1 for the terminal through the high-level signaling without containing CIF, the search space 2 of the service cell 1 contains CIF, the network side can schedule the service cell 3 and correspondingly configures nCI3, and can schedule serving cell 4 and configure n correspondinglyCI=4。
The terminal detects n only on the search space1 of the serving cell 1CIPDCCH of 0. In thatOn the search space 2 of the serving cell 1, the terminal detects nCI=0,nCI3 and nCIPDCCH of 4. In detecting PDCCH, for nCI3 and nCIThe PDCCH with 4 has COREST and search space configuration with nCIThe corresponding search space of 0 is the same as the configuration of CORESET.
< example three >
Referring to fig. 4, another PDCCH configuring method is further provided in an embodiment of the present invention, as shown in fig. 4, the method includes:
step 41, a network side configures configuration information of a search space of a serving cell for a terminal, where the configuration information of the search space includes cross-carrier scheduling information, and the cross-carrier scheduling information includes at least one of the following information:
whether a carrier indicator field is configured in a PDCCH DCI format corresponding to the search space;
the index of the scheduled cell scheduled by the serving cell corresponding to the search space;
the value of the carrier indicator field in the PDCCH DCI format corresponding to the search space of the serving cell of the scheduled cell;
the configuration information of the search space for configuring the serving cell for the terminal by the network side further includes a search space index, wherein the same search space index corresponds to a value of at least one carrier indicator field, and the search spaces corresponding to the same carrier indicator and the same search space index have the same configuration.
Here, the configuration of the search space generally includes a detection period of the search space set, a detection offset value, a detection time length, an aggregation level, and the number of PDCCH candidate sets per aggregation level, and the like. That is, one carrier indicator and one search space index of the serving cell are taken as one combination, which corresponds to one search space configuration.
In this embodiment, when the serving cell is a scheduled cell in cross-carrier scheduling, the network side does not need to configure the configuration information of the control resource set and/or the search space of the serving cell for the terminal. When the service cell is a scheduling cell in cross-carrier scheduling, the network side configures the configuration information of the control resource set and/or the search space of the service cell for the terminal. When a serving cell is a scheduling cell in cross-carrier scheduling, and a network side configures configuration information of a search space of the serving cell for a terminal, cross-carrier scheduling information may be added to the configuration information of the search space of the serving cell, where the cross-carrier scheduling information may include the following items:
1) whether a carrier indicator field is configured in the PDCCH DCI format corresponding to the search space.
Generally, when the serving cell is a self-scheduling cell, a Carrier Indicator Field (CIF) does not need to be configured; when the serving cell is a scheduling cell or a scheduled cell in cross-carrier scheduling, a Carrier Indication Field (CIF) needs to be configured, the value of the CIF of the scheduling cell is usually default to 0, and for the scheduled cell, the value of the CIF is nonzero at this time.
2) The search space corresponds to an index of a scheduled cell scheduled by the serving cell.
When the serving cell is a scheduling cell in cross-carrier scheduling, the index of the scheduling cell of the serving cell may also be included in the cross-carrier configuration information.
3) And the value of the carrier indicator field of the PDCCH DCI format corresponding to the search space of the serving cell of the scheduled cell.
When the serving cell is a scheduling cell in cross-carrier scheduling, a value (e.g., a non-zero value) of a carrier indicator field of the serving cell in a PDCCH DCI format of the scheduling cell may also be included in the cross-carrier configuration information.
Optionally, the cross-carrier scheduling information added to the configuration information of the search space of the serving cell may carry all the contents in the cross-carrier scheduling information, or may also carry part of the contents. When only carrying part of the content in the cross-carrier scheduling, the remaining part of the content may be configured to the terminal in other manners, for example, configured by other existing or newly defined higher layer signaling, which is not specifically limited in this embodiment of the present invention.
In this embodiment, the configuration information of the search space in which the network configures the serving cell for the terminal includes a search space index, and the search space index is unique in all bandwidth portions (BWPs) of the serving cell corresponding to one carrier indicator.
When the carrier indicator field is configured in the PDCCH DCI format of the serving cell, the value of the carrier indicator field is 0 for the scheduling of the serving cell.
Corresponding to the above method shown in fig. 4, an embodiment of the present invention provides a method for detecting a PDCCH, which is applied to a terminal side, and the method includes:
step c1, the terminal detects the PDCCH of the serving cell, wherein, in the control resource set CORESET with index p associated with the search space set with index s, the carrier indicator field nCIPDCCH candidate with aggregation level L in corresponding serving cell
Figure BDA0001813946620000206
The CCE index of (c) is:
Figure BDA0001813946620000201
wherein the content of the first and second substances,
Figure BDA0001813946620000202
representing search space related parameters;
NCCE,ptotal CCE number of CORESET p;
with respect to the common search space,
Figure BDA0001813946620000203
for a user-specific search space,
Figure BDA0001813946620000204
all n configured for a terminalCIIn the serving cell of (1), searching for the maximum value of the number of PDCCH candidates with aggregation level L in the space set s in CORESET p; wherein the content of the first and second substances,
Figure BDA0001813946620000205
represents nCISearching the number of PDCCH candidates with the aggregation level L of the space set s in the CORESET p of the serving cell of 0;
when the carrier indicator field is configured in the high-layer signaling, the nCITaking the value as the value of the carrier indicator field, otherwise, the nCIThe value is 0;
the value range of i is 0-L-1.
In this embodiment, the terminal may further receive configuration information of a PDCCH of a serving cell sent by the network side; the serving cell is a self-scheduling cell or a scheduling cell in cross-carrier scheduling, and the configuration information of the search space of the terminal includes cross-carrier scheduling information, where the cross-carrier scheduling information includes at least one of the following information:
the method comprises the steps that a terminal receives configuration information of a search space of a serving cell sent by a network side, the configuration information of the search space of the terminal comprises cross-carrier scheduling information, and the cross-carrier scheduling information comprises at least one of the following information:
whether a carrier indicator field is configured in a PDCCH DCI format corresponding to the search space;
the index of the scheduled cell scheduled by the serving cell corresponding to the search space;
the value of the carrier indicator field in the PDCCH DCI format corresponding to the search space of the serving cell of the scheduled cell;
the configuration information of the search space of the serving cell further includes a search space index, wherein the same search space index corresponds to a value of at least one carrier indicator field, and search spaces corresponding to the same carrier indicator and the same search space index have the same configuration.
In this embodiment, the terminal may further receive a search space index of the serving cell configured on the network side, where the search space index is unique on all BWPs of the serving cell corresponding to one carrier indicator.
Through the steps, the network side does not configure the control resource set and/or the configuration information of the search space of the scheduled cell for the terminal any more, so that the problem of inconsistent understanding of the network side and the terminal side caused by the fact that the scheduling cell and the scheduled cell are independently configured with CORESET and the search space is avoided, the PDCCH detection success rate can be improved, and the system performance is improved.
A specific example of the third embodiment is provided below.
A network side configures a search space1 of a service cell 1 for a terminal through a high-level signaling without including a CIF; a search space 2 of a serving cell 1 is also configured to contain a CIF through high-layer signaling, but a cell which can be scheduled by the cell is not configured, and the search space contains 2 PDCCH candidates with an aggregation level of 4; the search space 2 of a serving cell 1 is also configured by high-level signaling to contain CIF, which is configured to schedule a serving cell 3, corresponding to configuration nCI3, the search space contains 2 PDCCH candidates with aggregation level 4; the search space 2 of a serving cell 1 is additionally configured by high-level signaling to contain CIF, which is configured to schedule a serving cell 4, corresponding to configuration nCIThe search space contains 4 PDCCH candidates with aggregation level 4.
The terminal detects n only on the search space1 of the serving cell 1CIPDCCH of 0; on the search space 2 of the serving cell 1, the terminal detects nCI=0,nCI3 and nCIPDCCH of 4, wherein for
Figure BDA0001813946620000221
< example three-2 >
The embodiment of the invention also provides another PDCCH configuration method, which comprises the following steps:
d1, the network side configures cross-carrier scheduling information for the terminal; wherein the cross-carrier scheduling information comprises at least one of the following information:
whether a carrier indicator field is configured in a Downlink Control Information (DCI) format of a Physical Downlink Control Channel (PDCCH) of a serving cell;
an index of a scheduling cell of the serving cell and a value of a carrier indicator field of the serving cell in a PDCCH DCI format of the scheduling cell;
the index of the scheduled cell scheduled by the serving cell and the value of the carrier indicator field of the scheduled cell in the PDCCHDCI format of the serving cell.
In this embodiment, when a serving cell is a scheduling cell in cross-carrier scheduling, a network side configures configuration information of a control resource set and/or a search space of the serving cell for a terminal. When the serving cell is a scheduled cell in cross-carrier scheduling, the network side also needs to configure the configuration information of the control resource set and/or the search space of the serving cell for the terminal. When a serving cell is a scheduling cell in cross-carrier scheduling, and a network side configures configuration information of a search space of the serving cell for a terminal, cross-carrier scheduling information may be added to the configuration information of the search space of the serving cell, where the cross-carrier scheduling information may include the following items:
1) whether a carrier indicator field is configured in the PDCCH DCI format corresponding to the search space.
Generally, when the serving cell is a self-scheduling cell, a Carrier Indicator Field (CIF) does not need to be configured; when the serving cell is a scheduling cell or a scheduled cell in cross-carrier scheduling, a Carrier Indication Field (CIF) needs to be configured, the value of the CIF of the scheduling cell is usually default to 0, and for the scheduled cell, the value of the CIF is nonzero at this time.
2) The index of the scheduling cell of the serving cell and the value of the carrier indicator field of the serving cell in the PDCCHDCI format of the scheduling cell.
When the serving cell is a scheduled cell in cross-carrier scheduling, the index of the scheduling cell of the serving cell and the value (e.g., a non-zero value) of the carrier indicator field of the serving cell in the PDCCHDCI format of the scheduling cell may also be included in the cross-carrier configuration information.
3) The index of the scheduled cell scheduled by the serving cell and the value of the carrier indicator field of the scheduled cell in the PDCCHDCI format of the serving cell.
When the serving cell is a scheduling cell in cross-carrier scheduling, the index of a scheduled cell scheduled by the serving cell and the value (e.g., non-zero value) of the carrier indicator field of the scheduled cell in the PDCCH DCI format of the serving cell may also be included in the cross-carrier configuration information.
When the carrier indicator field is configured in the PDCCH DCI format of the serving cell, the value of the carrier indicator field is 0 for the scheduling of the serving cell.
Optionally, the cross-carrier scheduling information added to the configuration information of the search space of the serving cell may carry all the contents in the cross-carrier scheduling information, or may also carry part of the contents. When only carrying part of the content in the cross-carrier scheduling, the remaining part of the content may be configured to the terminal in other manners, for example, configured by other existing or newly defined higher layer signaling, which is not specifically limited in this embodiment of the present invention.
Corresponding to the above method, an embodiment of the present invention provides a method for detecting a PDCCH, which is applied to a terminal side, and the method includes:
step e1, the terminal detects the PDCCH of the serving cell, wherein, in the control resource set CORESET with index p associated with the search space set with index s, the carrier indicator field nCIPDCCH candidate with aggregation level L in corresponding serving cell
Figure BDA0001813946620000231
The CCE index of (c) is:
Figure BDA0001813946620000232
wherein the content of the first and second substances,
Figure BDA0001813946620000233
representing search space related parameters;
NCCE,ptotal CCE number of CORESET p;
with respect to the common search space,
Figure BDA0001813946620000234
for a user-specific search space,
Figure BDA0001813946620000235
all n configured for a terminalCIIn the serving cell of (1), searching for the maximum value of the number of PDCCH candidates with aggregation level L in the space set s in CORESET p; wherein the content of the first and second substances,
Figure BDA0001813946620000241
represents nCISearching the number of PDCCH candidates with the aggregation level L of the space set s in the CORESET p of the serving cell of 0;
when the carrier indicator field is configured in the high-layer signaling, the nCITaking the value as the value of the carrier indicator field, otherwise, the nCIThe value is 0;
the value range of i is 0-L-1.
And the terminal determines the association relationship between the search space of the scheduled cell and the CORESET according to the association relationship between the search space in the scheduling cell and the CORESET configured by the high-level signaling. In addition, the terminal may detect the PDCCH of the scheduled cell according to the CORESET configuration in the scheduling cell.
In this embodiment of the present invention, the terminal may further receive cross-carrier scheduling information of a serving cell sent by a network side, where the cross-carrier scheduling information includes at least one of the following information:
whether a carrier indicator field is configured in a Downlink Control Information (DCI) format of a Physical Downlink Control Channel (PDCCH) of a serving cell;
an index of a scheduling cell of the serving cell and a carrier indicator of the serving cell in a PDCCH DCI format of the scheduling cell;
an index of a scheduled cell scheduled by the serving cell and a carrier indicator of the scheduled cell in a PDCCHDCI format of the serving cell.
Through the steps, the terminal only carries out detection according to the configuration of the control resource set in the scheduling cell configured by the network side, neglects the configuration of the control resource set in the scheduled cell configured by the network side, but still according to the configuration of the search space in the scheduled cell configured by the network side, thereby avoiding the problem of inconsistent understanding of the network side and the terminal side caused by the independent configuration of CORESET in the scheduling cell and the scheduled cell, improving the success rate of PDCCH detection and improving the system performance.
A specific example of the above embodiment is provided below.
The network side supports cross-carrier scheduling through a high-level signaling service cell 1, and a configuration service cell 1 can schedule a service cell 2 and correspondingly configure nCI2. The high-level signaling configures CORESET p and search space s on the serving cell 1 at the same time, and also configures CORESET p and search space s on the serving cell 2 or the high-level signaling configures search space s only on the serving cell 2. The configuration of the search space s may be different on different serving cells. Terminal is detecting nCIWhen the PDCCH is 2, the aggregation level, the candidate number, the detection time slot, and the like are determined according to the configuration of the search space s configured on the serving cell 2 by the high-layer signaling, and the configuration of the CORESET is determined according to the CORESET p configured on the serving cell 1 by the high-layer signaling, so that the problem of inconsistent understanding of the CORESET p on the serving cells 1 and 2 is avoided.
< example four >
In this embodiment, the network side may configure cross-carrier scheduling information for the terminal through high-layer signaling. Wherein the cross-carrier scheduling configuration information comprises at least one of the following information: whether the physical downlink control channel DCI format of the serving cell includes a carrier indicator field and/or an index of a scheduling cell of the serving cell and a value of a carrier indicator of the serving cell in the downlink control channel DCI format of the scheduling cell.
And the network side respectively configures configuration information of the PDCCH for the terminal on a scheduling cell and a scheduled cell through high-level signaling, wherein the configuration information comprises a control resource set and/or search space configuration information.
In order to avoid the problem of inconsistency caused by the PDCCH being respectively configured in the scheduling cell and the scheduled cell at the terminal side, an embodiment of the present invention provides a method for detecting a PDCCH, as shown in fig. 5, including:
step 51, the terminal detects the PDCCH of the serving cell, wherein for the search space set with index s in the control resource set with index p, the search space set satisfies the formula
Figure BDA0001813946620000251
Then, the terminal judges that the PDCCH detection opportunity occurs in a frame number nfAnd the time slot number is
Figure BDA0001813946620000252
Within a time slot of (c);
mu is a subcarrier interval of a control resource set with index p of a scheduling cell; for example, when the serving cell is a scheduled cell, μ is a subcarrier interval of a control resource set with index p of the scheduling cell of the serving cell; when the serving cell is a scheduling cell, mu is a subcarrier interval of a control resource set with index p of the serving cell;
kp,sdetection period for search space set s, op,sIs the detection offset value for the search for the empty set s;
Figure BDA0001813946620000253
the number of time slots in each radio frame in a configuration with a subcarrier spacing of mu.
Here, preferably, when the network side configures the configuration information of the PDCCH for the terminal in each of the scheduling cell and the scheduled cell, the same configuration may be configured for the control resource sets with the same index. In this way, the control resource sets with the same index in the scheduling cell and the scheduled cell configured by the terminal have the same configuration.
Through the steps, when the network side configures the PDCCH of the scheduling cell and the PDCCH of the scheduled cell for the terminal respectively, the terminal determines the PDCCH detection opportunities according to the method, so that when the scheduling cell and the scheduled cell are configured with CORESET and search space independently, the PDCCH detection opportunities are determined in a unified mode, the problem of inconsistent understanding of the network side and the terminal side is avoided, the PDCCH detection success rate is improved, and the system performance is improved.
A specific example of the fourth embodiment is provided below.
The network side configures the service cell 1 with CIF for the terminal through high-level signaling, and can schedule the service cell 2. Assume that the subcarrier spacing for serving cell 1 is 15kHz and the subcarrier spacing for serving cell 2 is 30 kHz. The higher layer signaling configures core 1 and search space1 on the serving cell 1, and configures core 1 and search space1 on the serving cell 2.
When the terminal judges the detection opportunity of the search space1 in the CORESET1, the following formula is used
Figure BDA0001813946620000261
Where μ is the subcarrier spacing of serving cell 1 of 15kHz, kp,sAnd op,sOr on the serving cell 2 in accordance with higher layer signaling.
Based on the methods provided by the above embodiments, the embodiments of the present invention also provide apparatuses for implementing the methods.
Corresponding to the first embodiment, an embodiment of the present invention provides a network side device shown in fig. 6. Referring to fig. 6, an embodiment of the present invention provides a structural diagram of a network device 600, including: a configuration unit 601. Wherein the content of the first and second substances,
the configuration unit 601 is configured to configure cross-carrier scheduling information for the terminal; wherein the cross-carrier scheduling information comprises at least one of the following information:
whether a carrier indicator field is configured in a Downlink Control Information (DCI) format of a Physical Downlink Control Channel (PDCCH) of a serving cell;
an index of a scheduling cell of the serving cell and a value of a carrier indicator field of the serving cell in a PDCCH DCI format of the scheduling cell;
the index of the scheduled cell scheduled by the serving cell and the value of the carrier indicator field of the scheduled cell in the PDCCHDCI format of the serving cell.
Preferably, the configuring unit is further configured to not configure the configuration information of the control resource set and/or the search space of the serving cell for the terminal when the serving cell is a scheduled cell in cross-carrier scheduling.
Referring to fig. 7, an embodiment of the present invention provides another schematic structural diagram of a network-side device 700, which corresponds to the first embodiment, and includes: a processor 701, a transceiver 702, a memory 703 and a bus interface, wherein:
the processor 701 is configured to read a program in a memory, and execute the following processes: configuring cross-carrier scheduling information for a terminal; wherein the cross-carrier scheduling information comprises at least one of the following information:
whether a carrier indicator field is configured in a Downlink Control Information (DCI) format of a Physical Downlink Control Channel (PDCCH) of a serving cell;
an index of a scheduling cell of the serving cell and a value of a carrier indicator field of the serving cell in a PDCCH DCI format of the scheduling cell;
the index of the scheduled cell scheduled by the serving cell and the value of the carrier indicator field of the scheduled cell in the PDCCHDCI format of the serving cell.
Preferably, the processor 701 is further configured to not configure the configuration information of the control resource set and/or the search space of the serving cell for the terminal when the serving cell is a scheduled cell in cross-carrier scheduling.
In fig. 7, the bus architecture may include any number of interconnected buses and bridges, with one or more processors, represented by processor 701, and various circuits, represented by memory 703, being linked together. The bus architecture may also link together various other circuits such as peripherals, voltage regulators, power management circuits, and the like, which are well known in the art, and therefore, will not be described any further herein. The bus interface provides an interface. The transceiver 702 may be a number of elements including a transmitter and a receiver that provide a means for communicating with various other apparatus over a transmission medium.
The processor 701 is responsible for managing the bus architecture and general processing, and the memory 703 may store data used by the processor 701 in performing operations.
Referring to fig. 8, an embodiment of the present invention provides a terminal 17, which includes a detecting unit 81:
the detecting unit 81 is configured to detect a PDCCH candidate, where a carrier indicator n is in a control resource set CORESET with index p associated with a search space set with index sCIPDCCH candidate with aggregation level L in corresponding serving cell
Figure BDA0001813946620000271
The CCE index of (c) is:
Figure BDA0001813946620000272
wherein the content of the first and second substances,
Figure BDA0001813946620000273
representing search space related parameters;
NCCE,ptotal CCE number of CORESET p;
Figure BDA0001813946620000274
represents nCISearching the number of PDCCH candidates with the aggregation level L of the space set s in the CORESET p of the serving cell of 0;
when a carrier indicator field of a serving cell in a PDCCH DCI format of a scheduling cell is configured, the nCITaking the value of the carrier indicator field, otherwise, including any common search space, nCIThe value is 0;
the value range of i is 0-L-1.
Preferably, the terminal further includes:
a receiving unit, configured to receive cross-carrier scheduling information of a serving cell sent by a network side, where the cross-carrier scheduling information includes at least one of the following information:
whether a carrier indicator field is configured in a Downlink Control Information (DCI) format of a Physical Downlink Control Channel (PDCCH) of a serving cell;
an index of a scheduling cell of the serving cell and a carrier indicator of the serving cell in a PDCCH DCI format of the scheduling cell;
an index of a scheduled cell scheduled by the serving cell and a carrier indicator of the scheduled cell in a PDCCHDCI format of the serving cell.
Referring to fig. 9, another structural diagram of a terminal according to an embodiment of the present invention is shown corresponding to the first embodiment, where the terminal 900 includes: a processor 901, a transceiver 902, a memory 903, a user interface 904, and a bus interface.
In this embodiment of the present invention, the terminal 900 further includes: a computer program stored on the memory 903 and operable on the processor 901.
The processor 901 is configured to read a program in the memory, and execute the following processes:
detecting PDCCH candidates, wherein a carrier indicator n is in a control resource set CORESET of index p associated with a search space set of index sCIPDCCH candidate with aggregation level L in corresponding serving cell
Figure BDA0001813946620000281
The CCE index of (c) is:
Figure BDA0001813946620000282
wherein the content of the first and second substances,
Figure BDA0001813946620000283
representing search space related parameters;
NCCE,ptotal CCE number of CORESET p;
Figure BDA0001813946620000284
represents nCISearching the number of PDCCH candidates with the aggregation level L of the space set s in the CORESET p of the serving cell of 0;
when a carrier indicator field of a serving cell in a PDCCH DCI format of a scheduling cell is configured, the carrier indicator fieldnCITaking the value of the carrier indicator field, otherwise, including any common search space, nCIThe value is 0;
the value range of i is 0-L-1.
Preferably, the transceiver 902 is configured to receive cross-carrier scheduling information of a serving cell sent by a network side, where the cross-carrier scheduling information includes at least one of the following information:
whether a carrier indicator field is configured in a Downlink Control Information (DCI) format of a Physical Downlink Control Channel (PDCCH) of a serving cell;
an index of a scheduling cell of the serving cell and a carrier indicator of the serving cell in a PDCCH DCI format of the scheduling cell;
an index of a scheduled cell scheduled by the serving cell and a carrier indicator of the scheduled cell in a PDCCHDCI format of the serving cell.
In fig. 9, the bus architecture may include any number of interconnected buses and bridges, with one or more processors represented by processor 901 and various circuits of memory represented by memory 903 being linked together. The bus architecture may also link together various other circuits such as peripherals, voltage regulators, power management circuits, and the like, which are well known in the art, and therefore, will not be described any further herein. The bus interface provides an interface. The transceiver 902 may be a number of elements including a transmitter and a receiver that provide a means for communicating with various other apparatus over a transmission medium. For different user devices, the user interface 904 may also be an interface capable of interfacing with a desired device externally, including but not limited to a keypad, display, speaker, microphone, joystick, etc.
The processor 901 is responsible for managing a bus architecture and general processing, and the memory 903 may store data used by the processor 901 in performing operations.
Corresponding to the second to third embodiments, a structure of a network-side device similar to that of fig. 6 and 7 may be employed. The structure of the terminal similar to fig. 8 and 9 may be employed corresponding to the second to fourth embodiments. For economy of disclosure, the description is not repeated by way of illustration, but only the functions of the respective units are given.
Corresponding to the second embodiment, an embodiment of the present invention provides a network side device, which has a structure similar to that of fig. 6, and specifically includes:
a configuration unit, configured to configure configuration information of a search space of a serving cell for a terminal, where the configuration information of the search space includes cross-carrier scheduling information, and the cross-carrier scheduling information includes at least one of the following information:
whether a carrier indicator field is configured in a PDCCH DCI format corresponding to the search space;
the index of the scheduled cell scheduled by the serving cell corresponding to the search space;
and the value of the carrier indicator field of the PDCCH DCI format corresponding to the search space of the serving cell of the scheduled cell.
Preferably, the configuring unit is further configured to, when the serving cell is a scheduled cell in cross-carrier scheduling, the network side does not configure the configuration information of the control resource set and/or the search space of the serving cell for the terminal.
Preferably, search spaces corresponding to the same search space index of the serving cell have the same configuration.
Corresponding to the second embodiment, the embodiment of the present invention provides another network-side device, which has a structure similar to that of fig. 7, and specifically includes: a processor, a transceiver, a memory, and a bus interface, wherein:
the processor is used for reading the program in the memory and executing the following processes: configuring configuration information of a search space of a serving cell for a terminal, wherein the configuration information of the search space comprises cross-carrier scheduling information, and the cross-carrier scheduling information comprises at least one of the following information:
whether a carrier indicator field is configured in a PDCCH DCI format corresponding to the search space;
the index of the scheduled cell scheduled by the serving cell corresponding to the search space;
and the value of the carrier indicator field of the PDCCH DCI format corresponding to the search space of the serving cell of the scheduled cell.
Preferably, the configuring unit is further configured to, when the serving cell is a scheduled cell in cross-carrier scheduling, the network side does not configure the configuration information of the control resource set and/or the search space of the serving cell for the terminal.
Preferably, search spaces corresponding to the same search space index of the serving cell have the same configuration.
Corresponding to the second embodiment, an embodiment of the present invention provides a terminal, which has a structure similar to that of fig. 8, and specifically includes:
a detecting unit, configured to detect a PDCCH of a serving cell, where in a control resource set CORESET with an index p associated with a search space set with an index s, a carrier indicator field n is includedCIPDCCH candidate with aggregation level L in corresponding serving cell
Figure BDA0001813946620000301
The CCE index of (c) is:
Figure BDA0001813946620000302
wherein the content of the first and second substances,
Figure BDA0001813946620000311
representing search space related parameters;
NCCE,ptotal CCE number of CORESET p;
Figure BDA0001813946620000312
represents nCISearching the number of PDCCH candidates with the aggregation level L of the space set s in the CORESET p of the serving cell of 0;
when the carrier indicator field is configured in the high-layer signaling, the nCITaking the value as the value of the carrier indicator field, otherwise, the nCIThe value is 0;
the value range of i is 0-L-1.
Preferably, the terminal further includes:
a receiving unit, configured to receive configuration information of a search space of a serving cell sent by a network side, where the configuration information of the search space of the terminal includes cross-carrier scheduling information, and the cross-carrier scheduling information includes at least one of the following information:
whether a carrier indicator field is configured in a PDCCH DCI format corresponding to the search space;
the index of the scheduled cell scheduled by the serving cell corresponding to the search space;
and the value of the carrier indicator field of the PDCCH DCI format corresponding to the search space of the serving cell of the scheduled cell.
Preferably, the same search space index of the serving cell corresponds to a value of at least one carrier indicator field, and search spaces corresponding to the same search space index have the same configuration.
Corresponding to the second embodiment, an embodiment of the present invention provides a terminal, which has a structure similar to that of fig. 9, and specifically includes: a processor, a transceiver, a memory, a user interface, and a bus interface.
In the embodiment of the present invention, the terminal further includes: a computer program stored on the memory and executable on the processor.
The processor is used for reading the program in the memory and executing the following processes: detecting PDCCH of a serving cell, wherein in a control resource set CORESET with index p associated with a search space set with index s, a carrier indicator field nCIPDCCH candidate with aggregation level L in corresponding serving cell
Figure BDA0001813946620000314
The CCE index of (c) is:
Figure BDA0001813946620000313
wherein the content of the first and second substances,
Figure BDA0001813946620000321
representing search space related parameters;
NCCE,ptotal CCE number of CORESET p;
Figure BDA0001813946620000322
represents nCISearching the number of PDCCH candidates with the aggregation level L of the space set s in the CORESET p of the serving cell of 0;
when the carrier indicator field is configured in the high-layer signaling, the nCITaking the value as the value of the carrier indicator field, otherwise, the nCIThe value is 0;
the value range of i is 0-L-1.
Preferably, the transceiver is configured to receive configuration information of a search space of a serving cell sent by a network side, where the configuration information of the search space of the terminal includes cross-carrier scheduling information, and the cross-carrier scheduling information includes at least one of the following information:
whether a carrier indicator field is configured in a PDCCH DCI format corresponding to the search space;
the index of the scheduled cell scheduled by the serving cell corresponding to the search space;
and the value of the carrier indicator field of the PDCCH DCI format corresponding to the search space of the serving cell of the scheduled cell.
Preferably, the same search space index of the serving cell corresponds to a value of at least one carrier indicator field, and search spaces corresponding to the same search space index have the same configuration.
Corresponding to the third embodiment, an embodiment of the present invention provides a network side device, which has a structure similar to that of fig. 6, and specifically includes:
a configuration unit, configured to configure configuration information of a search space of a serving cell for a terminal, where the configuration information of the search space includes cross-carrier scheduling information, and the cross-carrier scheduling information includes at least one of the following information:
whether a carrier indicator field is configured in a PDCCH DCI format corresponding to the search space;
the index of the scheduled cell scheduled by the serving cell corresponding to the search space;
the value of the carrier indicator field in the PDCCH DCI format corresponding to the search space of the serving cell of the scheduled cell;
the configuration information of the search space for configuring the service cell for the terminal at the network side further comprises a search space index, wherein the same search space index corresponds to the value of at least one carrier indicator field, and the search spaces corresponding to the same carrier indicator and the same search space index have the same configuration.
Preferably, the configuration information for configuring the search space of the serving cell for the terminal includes a search space index that is unique over all bandwidth parts BWP of the serving cell corresponding to one carrier indicator.
Preferably, in the network side device, the configuration unit is further configured to, when the serving cell is a scheduled cell in cross-carrier scheduling, the network side does not configure the configuration information of the control resource set and/or the search space of the serving cell for the terminal.
Corresponding to the third embodiment, the embodiment of the present invention provides another network-side device, which has a structure similar to that of fig. 7, and specifically includes: a processor, a transceiver, a memory, and a bus interface, wherein:
the processor is used for reading the program in the memory and executing the following processes: configuring configuration information of a search space of a serving cell for a terminal, wherein the configuration information of the search space comprises cross-carrier scheduling information, and the cross-carrier scheduling information comprises at least one of the following information:
whether a carrier indicator field is configured in a PDCCH DCI format corresponding to the search space;
the index of the scheduled cell scheduled by the serving cell corresponding to the search space;
the value of the carrier indicator field in the PDCCH DCI format corresponding to the search space of the serving cell of the scheduled cell;
the configuration information of the search space for configuring the service cell for the terminal at the network side further comprises a search space index, wherein the same search space index corresponds to the value of at least one carrier indicator field, and the search spaces corresponding to the same carrier indicator and the same search space index have the same configuration.
Preferably, the configuration information for configuring the search space of the serving cell for the terminal includes a search space index that is unique over all bandwidth parts BWP of the serving cell corresponding to one carrier indicator.
Preferably, the processor is further configured to, when the serving cell is a scheduled cell in cross-carrier scheduling, the network side does not configure the configuration information of the control resource set and/or the search space of the serving cell for the terminal.
Corresponding to the third embodiment, an embodiment of the present invention provides a terminal, which has a structure similar to that of fig. 8, and specifically includes:
a detecting unit, configured to detect a PDCCH of a serving cell, where in a control resource set CORESET with an index p associated with a search space set with an index s, a carrier indicator field n is includedCIPDCCH candidate with aggregation level L in corresponding serving cell
Figure BDA0001813946620000331
The CCE index of (c) is:
Figure BDA0001813946620000341
wherein the content of the first and second substances,
Figure BDA0001813946620000342
representing search space related parameters;
NCCE,ptotal CCE number of CORESET p;
with respect to the common search space,
Figure BDA0001813946620000343
for a user-specific search space,
Figure BDA0001813946620000344
all n configured for a terminalCIIn the serving cell of (1), searching for the maximum value of the number of PDCCH candidates with aggregation level L in the space set s in CORESET p; wherein the content of the first and second substances,
Figure BDA0001813946620000345
represents nCISearching the number of PDCCH candidates with the aggregation level L of the space set s in the CORESET p of the serving cell of 0;
when the carrier indicator field is configured in the high-layer signaling, the nCITaking the value as the value of the carrier indicator field, otherwise, the nCIThe value is 0;
the value range of i is 0-L-1.
Preferably, the terminal further includes:
a receiving unit, configured to receive configuration information of a PDCCH of a serving cell sent by a network side; the serving cell is a self-scheduling cell or a scheduling cell in cross-carrier scheduling, and the configuration information of the search space of the terminal includes cross-carrier scheduling information, where the cross-carrier scheduling information includes at least one of the following information:
the method comprises the steps that a terminal receives configuration information of a search space of a serving cell sent by a network side, the configuration information of the search space of the terminal comprises cross-carrier scheduling information, and the cross-carrier scheduling information comprises at least one of the following information:
whether a carrier indicator field is configured in a PDCCH DCI format corresponding to the search space;
the index of the scheduled cell scheduled by the serving cell corresponding to the search space;
the value of the carrier indicator field in the PDCCH DCI format corresponding to the search space of the serving cell of the scheduled cell;
the configuration information of the search space of the serving cell further includes a search space index, wherein the same search space index corresponds to a value of at least one carrier indicator field, and search spaces corresponding to the same carrier indicator and the same search space index have the same configuration.
Preferably, the terminal further includes:
a first determining unit, configured to determine, according to an association relationship between a search space in a scheduling cell configured by a high-level signaling and a CORESET, an association relationship between the search space of the scheduled cell and the CORESET.
Preferably, the detecting unit is further configured to detect the PDCCH of the scheduled cell according to the CORESET configuration in the scheduling cell configured by the higher layer signaling.
Preferably, the receiving unit is further configured to receive a search space index of a serving cell configured on the network side, where the search space index is unique on all bandwidth portions BWP of the serving cell corresponding to one carrier indicator.
Corresponding to the third embodiment, an embodiment of the present invention provides a terminal, which has a structure similar to that of fig. 9, and specifically includes: a processor, a transceiver, a memory, a user interface, and a bus interface.
In the embodiment of the present invention, the terminal further includes: a computer program stored on the memory and executable on the processor.
The processor is used for reading the program in the memory and executing the following processes:
detecting PDCCH of a serving cell, wherein in a control resource set CORESET with index p associated with a search space set with index s, a carrier indicator field nCIPDCCH candidate with aggregation level L in corresponding serving cell
Figure BDA0001813946620000351
The CCE index of (c) is:
Figure BDA0001813946620000352
wherein the content of the first and second substances,
Figure BDA0001813946620000353
representing search space related parameters;
NCCE,ptotal CCE number of CORESET p;
with respect to the common search space,
Figure BDA0001813946620000354
for a user-specific search space,
Figure BDA0001813946620000355
all n configured for a terminalCIIn the serving cell of (1), searching for the maximum value of the number of PDCCH candidates with aggregation level L in the space set s in CORESET p; wherein the content of the first and second substances,represents nCISearching the number of PDCCH candidates with the aggregation level L of the space set s in the CORESET p of the serving cell of 0;
when the carrier indicator field is configured in the high-layer signaling, the nCITaking the value as the value of the carrier indicator field, otherwise, the nCIThe value is 0;
the value range of i is 0-L-1.
Preferably, the transceiver is configured to receive configuration information of a PDCCH of a serving cell sent by a network side; the serving cell is a self-scheduling cell or a scheduling cell in cross-carrier scheduling, and the configuration information of the search space of the terminal includes cross-carrier scheduling information, where the cross-carrier scheduling information includes at least one of the following information:
the method comprises the steps that a terminal receives configuration information of a search space of a serving cell sent by a network side, the configuration information of the search space of the terminal comprises cross-carrier scheduling information, and the cross-carrier scheduling information comprises at least one of the following information:
whether a carrier indicator field is configured in a PDCCH DCI format corresponding to the search space;
the index of the scheduled cell scheduled by the serving cell corresponding to the search space;
the value of the carrier indicator field in the PDCCH DCI format corresponding to the search space of the serving cell of the scheduled cell;
the configuration information of the search space of the serving cell further includes a search space index, wherein the same search space index corresponds to a value of at least one carrier indicator field, and search spaces corresponding to the same carrier indicator and the same search space index have the same configuration.
Preferably, the transceiver is further configured to receive a search space index of a serving cell configured on the network side, where the search space index is unique on all bandwidth portions BWP of the serving cell corresponding to one carrier indicator.
Preferably, the processor is further configured to determine an association relationship between the search space of the scheduled cell and the CORESET according to the association relationship between the search space in the scheduling cell and the CORESET configured by the high-level signaling.
Preferably, the processor is further configured to detect the PDCCH of the scheduled cell according to the CORESET configuration in the scheduling cell configured by the higher layer signaling.
Corresponding to the fourth embodiment, an embodiment of the present invention provides a terminal, which has a structure similar to that of fig. 8, and specifically includes:
a detecting unit, configured to detect a PDCCH of a serving cell, where a search space set with an index s in a control resource set with an index p satisfies a formula
Figure BDA0001813946620000361
Then, the terminal judges that the PDCCH detection opportunity occurs in a frame number nfAnd the time slot number is
Figure BDA0001813946620000362
Within a time slot of (c);
mu is a subcarrier interval of a control resource set with index p of a scheduling cell;
kp,sdetection period for search space set s, op,sIs the detection offset value for the search for the empty set s;
Figure BDA0001813946620000371
the number of time slots in each radio frame in a configuration with a subcarrier spacing of mu.
Preferably, in the scheduling cell and the scheduled cell configured by the terminal, the control resource sets with the same index have the same configuration.
Corresponding to the fourth embodiment, an embodiment of the present invention provides a terminal, which has a structure similar to that of fig. 9, and specifically includes: a processor, a transceiver, a memory, a user interface, and a bus interface.
In the embodiment of the present invention, the terminal further includes: a computer program stored on the memory and executable on the processor.
The processor is used for reading the program in the memory and executing the following processes: detecting PDCCH of a serving cell, wherein a search space set with index s in a control resource set with index p satisfies a formula
Figure BDA0001813946620000372
Then, the terminal judges that the PDCCH detection opportunity occurs in a frame number nfAnd the time slot number is
Figure BDA0001813946620000373
Within a time slot of (c);
mu is a subcarrier interval of a control resource set with index p of a scheduling cell;
kp,sdetection period for search space set s, op,sIs the detection offset value for the search for the empty set s;
Figure BDA0001813946620000374
the number of time slots in each radio frame in a configuration with a subcarrier spacing of mu.
Those of ordinary skill in the art will appreciate that the various illustrative elements and algorithm steps described in connection with the embodiments disclosed herein may be implemented as electronic hardware or combinations of computer software and electronic hardware. Whether such functionality is implemented as hardware or software depends upon the particular application and design constraints imposed on the implementation. 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 invention.
It is clear to those skilled in the art that, for convenience and brevity of description, the specific working processes of the above-described systems, apparatuses and units may refer to the corresponding processes in the foregoing method embodiments, and are not described herein again.
In the embodiments provided in the present application, it should be understood that the disclosed apparatus and method may be implemented in other ways. For example, the above-described apparatus embodiments are merely illustrative, and for example, the division of the units is only one logical division, and other divisions may be realized in practice, for example, a plurality of units or components may be combined or integrated into another system, or some features may be omitted, or not executed. In addition, the shown or discussed mutual coupling or direct coupling or communication connection may be an indirect coupling or communication connection through some interfaces, devices or units, and may be in an electrical, mechanical or other form.
The units described as separate parts may or may not be physically separate, and parts displayed as units may or may not be physical units, may be located in one place, or may be distributed on a plurality of network units. Some or all of the units can be selected according to actual needs to achieve the purpose of the solution of the embodiment of the present invention.
In addition, functional units in the embodiments of the present invention may be integrated into one processing unit, or each unit may exist alone physically, or two or more units are integrated into one unit.
The functions, if implemented in the form of software functional units and sold or used as a stand-alone product, may be stored in a computer readable storage medium. Based on such understanding, the technical solution of the present invention may be embodied in the form of a software product, which is stored in a storage medium and includes several instructions for causing a computer device (which may be a personal computer, a server, or a network device) to execute all or part of the steps of the method for indicating the spatial correlation information according to the embodiments of the present invention. And the aforementioned storage medium includes: various media capable of storing program codes, such as a U disk, a removable hard disk, a ROM, a RAM, a magnetic disk, or an optical disk.
The above description is only for the specific embodiments of the present invention, but the scope of the present invention is not limited thereto, and any person skilled in the art can easily conceive of the changes or substitutions within the technical scope of the present invention, and all the changes or substitutions should be covered within the scope of the present invention. Therefore, the protection scope of the present invention shall be subject to the protection scope of the claims.

Claims (42)

1. A method for configuring a Physical Downlink Control Channel (PDCCH) is characterized by comprising the following steps:
a network side configures cross-carrier scheduling information for a terminal; wherein the cross-carrier scheduling information comprises at least one of the following information:
whether a carrier indicator field is configured in a Downlink Control Information (DCI) format of a Physical Downlink Control Channel (PDCCH) of a serving cell;
an index of a scheduling cell of the serving cell and a value of a carrier indicator field of the serving cell in a PDCCH DCI format of the scheduling cell;
an index of a scheduled cell scheduled by the serving cell and a value of a carrier indicator field of the scheduled cell in a PDCCH DCI format of the serving cell.
2. The configuration method according to claim 1,
when the serving cell is a scheduled cell in cross-carrier scheduling, the network side does not configure the configuration information of the control resource set and/or the search space of the serving cell for the terminal.
3. A method for detecting a Physical Downlink Control Channel (PDCCH) is characterized by comprising the following steps:
the terminal detects PDCCH candidates, wherein, in a control resource set CORESET with index p associated with a search space set with index s, a carrier indicator nCIPDCCH candidate with aggregation level L in corresponding serving cell
Figure FDA0001813946610000011
The CCE index of (c) is:
Figure FDA0001813946610000012
wherein the content of the first and second substances,
Figure FDA0001813946610000013
representing search space related parameters;
NCCE,ptotal CCE number of CORESET p;
Figure FDA0001813946610000014
represents nCISearching the number of PDCCH candidates with the aggregation level L of the space set s in the CORESET p of the serving cell of 0;
when the carrier indicator field is configured in the high-layer signaling, the nCITaking the value of the carrier indicator field, otherwise, including any common search space, nCIThe value is 0;
the value range of i is 0-L-1.
4. The detection method according to claim 3, further comprising:
a terminal receives cross-carrier scheduling information of a serving cell sent by a network side, wherein the cross-carrier scheduling information comprises at least one of the following information:
whether a carrier indicator field is configured in a Downlink Control Information (DCI) format of a Physical Downlink Control Channel (PDCCH) of a serving cell;
an index of a scheduling cell of the serving cell and a carrier indicator of the serving cell in a PDCCH DCI format of the scheduling cell;
an index of a scheduled cell scheduled by the serving cell and a carrier indicator of the scheduled cell in a PDCCH DCI format of the serving cell.
5. A method for configuring a Physical Downlink Control Channel (PDCCH) is characterized by comprising the following steps:
a network side configures configuration information of a search space of a service cell for a terminal, wherein the configuration information of the search space comprises cross-carrier scheduling information, and the cross-carrier scheduling information comprises at least one of the following information:
whether a carrier indicator field is configured in a PDCCH DCI format corresponding to the search space;
the index of the scheduled cell scheduled by the serving cell corresponding to the search space;
and the value of the carrier indicator field of the PDCCH DCI format corresponding to the search space of the serving cell of the scheduled cell.
6. The configuration method according to claim 5,
when the serving cell is a scheduled cell in cross-carrier scheduling, the network side does not configure the configuration information of the control resource set and/or the search space of the serving cell for the terminal.
7. The configuration method according to claim 5,
the same search space index of the serving cell corresponds to a value of at least one carrier indicator field, and search spaces corresponding to the same search space index have the same configuration.
8. A method for detecting a Physical Downlink Control Channel (PDCCH) is characterized by comprising the following steps:
the terminal detects the PDCCH of a serving cell, wherein in a control resource set CORESET with index p associated with a search space set with index s, a carrier indicator field nCIPDCCH candidate with aggregation level L in corresponding serving cell
Figure FDA0001813946610000021
The CCE index of (c) is:
Figure FDA0001813946610000022
wherein the content of the first and second substances,
Figure FDA0001813946610000031
representing search space related parameters;
NCCE,ptotal CCE number of CORESET p;
Figure FDA0001813946610000032
represents nCISearching the number of PDCCH candidates with the aggregation level L of the space set s in the CORESET p of the serving cell of 0;
when the carrier indicator field is configured in the high-layer signaling, the nCITaking the value as the value of the carrier indicator field, otherwise, the nCIThe value is 0;
the value range of i is 0-L-1.
9. The detection method according to claim 8, further comprising:
a terminal receives configuration information of a search space of a serving cell sent by a network side, wherein the configuration information of the search space of the terminal comprises cross-carrier scheduling information, and the cross-carrier scheduling information comprises at least one of the following information:
whether a carrier indicator field is configured in a PDCCH DCI format corresponding to the search space;
the index of the scheduled cell scheduled by the serving cell corresponding to the search space;
and the value of the carrier indicator field of the PDCCH DCI format corresponding to the search space of the serving cell of the scheduled cell.
10. The detection method according to claim 8,
the same search space index of the serving cell corresponds to a value of at least one carrier indicator field, and search spaces corresponding to the same search space index have the same configuration.
11. A method for configuring a Physical Downlink Control Channel (PDCCH) is characterized by comprising the following steps:
a network side configures configuration information of a search space of a service cell for a terminal, wherein the configuration information of the search space comprises cross-carrier scheduling information, and the cross-carrier scheduling information comprises at least one of the following information:
whether a carrier indicator field is configured in a PDCCH DCI format corresponding to the search space;
the index of the scheduled cell scheduled by the serving cell corresponding to the search space;
the value of the carrier indicator field in the PDCCH DCI format corresponding to the search space of the serving cell of the scheduled cell;
the configuration information of the search space for configuring the service cell for the terminal at the network side further comprises a search space index, wherein the same search space index corresponds to the value of at least one carrier indicator field, and the search spaces corresponding to the same carrier indicator and the same search space index have the same configuration.
12. The configuration method according to claim 11,
the configuration information of the search space for configuring the serving cell for the terminal at the network side includes a search space index, and the search space index is unique on all bandwidth portions BWP of the serving cell corresponding to one carrier indicator.
13. The configuration method according to claim 11,
when the serving cell is a scheduled cell in cross-carrier scheduling, the network side does not configure the configuration information of the control resource set and/or the search space of the serving cell for the terminal.
14. A method for detecting a Physical Downlink Control Channel (PDCCH) is characterized by comprising the following steps:
the terminal detects the PDCCH of a serving cell, wherein in a control resource set CORESET with index p associated with a search space set with index s, a carrier indicator field nCIPDCCH candidate with aggregation level L in corresponding serving cell
Figure FDA0001813946610000041
The CCE index of (c) is:
Figure FDA0001813946610000042
wherein the content of the first and second substances,
Figure FDA0001813946610000043
representing search space related parameters;
NCCE,ptotal CCE number of CORESET p;
with respect to the common search space,
Figure FDA0001813946610000044
for a user-specific search space,
Figure FDA0001813946610000045
all n configured for a terminalCIIn the serving cell of (1), searching for the maximum value of the number of PDCCH candidates with aggregation level L in the space set s in CORESET p; wherein the content of the first and second substances,
Figure FDA0001813946610000046
represents nCISearching the number of PDCCH candidates with the aggregation level L of the space set s in the CORESET p of the serving cell of 0;
when the carrier indicator field is configured in the high-layer signaling, the nCITaking the value as the value of the carrier indicator field, otherwise, the nCIThe value is 0;
the value range of i is 0-L-1.
15. The detection method according to claim 14, further comprising:
and the terminal determines the association relationship between the search space of the scheduled cell and the CORESET according to the association relationship between the search space in the scheduling cell and the CORESET configured by the high-level signaling.
16. The detection method according to claim 14, further comprising:
and the terminal detects the PDCCH of the scheduled cell according to the CORESET configuration in the scheduling cell configured by the high-level signaling.
17. The detection method according to claim 14, further comprising:
the method comprises the steps that a terminal receives configuration information of a search space of a serving cell sent by a network side, the configuration information of the search space of the terminal comprises cross-carrier scheduling information, and the cross-carrier scheduling information comprises at least one of the following information:
whether a carrier indicator field is configured in a PDCCH DCI format corresponding to the search space;
the index of the scheduled cell scheduled by the serving cell corresponding to the search space;
the value of the carrier indicator field in the PDCCH DCI format corresponding to the search space of the serving cell of the scheduled cell;
the configuration information of the search space of the serving cell further includes a search space index, wherein the same search space index corresponds to a value of at least one carrier indicator field, and search spaces corresponding to the same carrier indicator and the same search space index have the same configuration.
18. The detection method according to claim 14, further comprising:
the terminal receives the index of the search space of the serving cell configured by the network side, and the index of the search space is unique on all bandwidth parts BWP of the serving cell corresponding to one carrier indicator.
19. A method for detecting a Physical Downlink Control Channel (PDCCH) is characterized by comprising the following steps:
the terminal detects the PDCCH of the serving cell, wherein for a search space set with an index of s in a control resource set with an index of p, a formula is satisfied
Figure FDA0001813946610000051
Then, the terminal judges that the PDCCH detection opportunity occurs in a frame number nfAnd the time slot number is
Figure FDA0001813946610000052
Within a time slot of (c);
mu is a subcarrier interval of a control resource set with index p of a scheduling cell;
kp,sdetection period for search space set s, op,sIs the detection offset value for the search for the empty set s;
Figure FDA0001813946610000053
the number of time slots in each radio frame in a configuration with a subcarrier spacing of mu.
20. The detection method according to claim 19,
and in the scheduling cell and the scheduled cell configured by the terminal, the control resource sets with the same index have the same configuration.
21. A network-side device, comprising:
a configuration unit, configured to configure cross-carrier scheduling information for a terminal; wherein the cross-carrier scheduling information comprises at least one of the following information:
whether a carrier indicator field is configured in a Downlink Control Information (DCI) format of a Physical Downlink Control Channel (PDCCH) of a serving cell;
an index of a scheduling cell of the serving cell and a value of a carrier indicator field of the serving cell in a PDCCH DCI format of the scheduling cell;
an index of a scheduled cell scheduled by the serving cell and a value of a carrier indicator field of the scheduled cell in a PDCCH DCI format of the serving cell.
22. The network-side device of claim 21,
the configuration unit is further configured to not configure the configuration information of the control resource set and/or the search space of the serving cell for the terminal when the serving cell is a scheduled cell in cross-carrier scheduling.
23. A terminal, comprising:
a detecting unit, configured to detect a PDCCH candidate, where a carrier indicator n is in a control resource set CORESET with index p associated with a search space set with index sCIPDCCH candidate with aggregation level L in corresponding serving cell
Figure FDA0001813946610000061
The CCE index of (c) is:
Figure FDA0001813946610000062
wherein the content of the first and second substances,
Figure FDA0001813946610000063
representing search space related parameters;
NCCE,ptotal CCE number of CORESET p;
Figure FDA0001813946610000064
represents nCISearching the number of PDCCH candidates with the aggregation level L of the space set s in the CORESET p of the serving cell of 0;
when a carrier indicator field of a serving cell in a PDCCH DCI format of a scheduling cell is configured, the nCITaking the value of the carrier indicator field, otherwise, including any common search space, nCIThe value is 0;
the value range of i is 0-L-1.
24. The terminal of claim 23, further comprising:
a receiving unit, configured to receive cross-carrier scheduling information of a serving cell sent by a network side, where the cross-carrier scheduling information includes at least one of the following information:
whether a carrier indicator field is configured in a Downlink Control Information (DCI) format of a Physical Downlink Control Channel (PDCCH) of a serving cell;
an index of a scheduling cell of the serving cell and a carrier indicator of the serving cell in a PDCCH DCI format of the scheduling cell;
an index of a scheduled cell scheduled by the serving cell and a carrier indicator of the scheduled cell in a PDCCH DCI format of the serving cell.
25. A network-side device, comprising:
a configuration unit, configured to configure configuration information of a search space of a serving cell for a terminal, where the configuration information of the search space includes cross-carrier scheduling information, and the cross-carrier scheduling information includes at least one of the following information:
whether a carrier indicator field is configured in a PDCCH DCI format corresponding to the search space;
the index of the scheduled cell scheduled by the serving cell corresponding to the search space;
and the value of the carrier indicator field of the PDCCH DCI format corresponding to the search space of the serving cell of the scheduled cell.
26. The network-side device of claim 25,
the configuration unit is further configured to, when the serving cell is a scheduled cell in cross-carrier scheduling, the network side does not configure the configuration information of the control resource set and/or the search space of the serving cell for the terminal.
27. The network-side device of claim 25,
the search spaces corresponding to the same search space index of the serving cell have the same configuration.
28. A terminal, comprising:
a detecting unit, configured to detect a PDCCH of a serving cell, where in a control resource set CORESET with an index p associated with a search space set with an index s, a carrier indicator field n is includedCIPDCCH candidate with aggregation level L in corresponding serving cell
Figure FDA0001813946610000071
The CCE index of (c) is:
Figure FDA0001813946610000072
wherein the content of the first and second substances,
Figure FDA0001813946610000073
representing search space related parameters;
NCCE,ptotal CCE number of CORESET p;
Figure FDA0001813946610000074
represents nCISearching the number of PDCCH candidates with the aggregation level L of the space set s in the CORESET p of the serving cell of 0;
when the carrier indicator field is configured in the high-layer signaling, the nCITaking the value as the value of the carrier indicator field, otherwise, the nCIThe value is 0;
the value range of i is 0-L-1.
29. The terminal of claim 28, further comprising:
a receiving unit, configured to receive configuration information of a search space of a serving cell sent by a network side, where the configuration information of the search space of the terminal includes cross-carrier scheduling information, and the cross-carrier scheduling information includes at least one of the following information:
whether a carrier indicator field is configured in a PDCCH DCI format corresponding to the search space;
the index of the scheduled cell scheduled by the serving cell corresponding to the search space;
and the value of the carrier indicator field of the PDCCH DCI format corresponding to the search space of the serving cell of the scheduled cell.
30. The terminal of claim 28,
the same search space index of the serving cell corresponds to a value of at least one carrier indicator field, and search spaces corresponding to the same search space index have the same configuration.
31. A network-side device, comprising:
a configuration unit, configured to configure configuration information of a search space of a serving cell for a terminal, where the configuration information of the search space includes cross-carrier scheduling information, and the cross-carrier scheduling information includes at least one of the following information:
whether a carrier indicator field is configured in a PDCCH DCI format corresponding to the search space;
the index of the scheduled cell scheduled by the serving cell corresponding to the search space;
the value of the carrier indicator field in the PDCCH DCI format corresponding to the search space of the serving cell of the scheduled cell;
the configuration information of the search space for configuring the service cell for the terminal at the network side further comprises a search space index, wherein the same search space index corresponds to the value of at least one carrier indicator field, and the search spaces corresponding to the same carrier indicator and the same search space index have the same configuration.
32. The network-side device of claim 31,
the configuration information configuring the search space of the serving cell for the terminal includes a search space index that is unique over all bandwidth parts BWP of the serving cell corresponding to one carrier indicator.
33. The network-side device of claim 31,
the configuration unit is further configured to, when the serving cell is a scheduled cell in cross-carrier scheduling, the network side does not configure the configuration information of the control resource set and/or the search space of the serving cell for the terminal.
34. A terminal, comprising:
a detecting unit, configured to detect a PDCCH of a serving cell, where in a control resource set CORESET with an index p associated with a search space set with an index s, a carrier indicator field n is includedCIPDCCH candidate with aggregation level L in corresponding serving cell
Figure FDA0001813946610000091
The CCE index of (c) is:
Figure FDA0001813946610000092
wherein the content of the first and second substances,
Figure FDA0001813946610000093
representing search space related parameters;
NCCE,ptotal CCE number of CORESET p;
with respect to the common search space,
Figure FDA0001813946610000094
for a user-specific search space,
Figure FDA0001813946610000095
all n configured for a terminalCIIn the serving cell of (1), searching for the maximum value of the number of PDCCH candidates with aggregation level L in the space set s in CORESET p; wherein the content of the first and second substances,
Figure FDA0001813946610000096
represents nCISearching the number of PDCCH candidates with the aggregation level L of the space set s in the CORESET p of the serving cell of 0;
when the carrier indicator field is configured in the high-layer signaling, the nCITaking the value as the value of the carrier indicator field, otherwise, the nCIThe value is 0;
the value range of i is 0-L-1.
35. The terminal of claim 34, further comprising:
a first determining unit, configured to determine, according to an association relationship between a search space in a scheduling cell configured by a high-level signaling and a CORESET, an association relationship between the search space of the scheduled cell and the CORESET.
36. The terminal of claim 34,
the detecting unit is further configured to detect the PDCCH of the scheduled cell according to the CORESET configuration in the scheduling cell configured by the high-level signaling.
37. The terminal of claim 34, further comprising:
a receiving unit, configured to receive configuration information of a search space of a serving cell sent by a receiving network side, where the configuration information of the search space includes cross-carrier scheduling information, and the cross-carrier scheduling information includes at least one of the following information:
whether a carrier indicator field is configured in a PDCCH DCI format corresponding to the search space;
the index of the scheduled cell scheduled by the serving cell corresponding to the search space;
the value of the carrier indicator field in the PDCCH DCI format corresponding to the search space of the serving cell of the scheduled cell;
the configuration information of the search space of the serving cell further includes a search space index, wherein the same search space index corresponds to a value of at least one carrier indicator field, and search spaces corresponding to the same carrier indicator and the same search space index have the same configuration.
38. The terminal of claim 37,
the receiving unit is further configured to receive a search space index of the serving cell configured on the network side, where the search space index is unique on all bandwidth portions BWP of the serving cell corresponding to one carrier indicator.
39. A terminal, comprising:
a detecting unit, configured to detect a PDCCH of a serving cell, where a search space set with an index s in a control resource set with an index p satisfies a formula
Figure FDA0001813946610000101
Time, terminalJudging whether PDCCH detection opportunity occurs in a frame number nfAnd the time slot number is
Figure FDA0001813946610000102
Within a time slot of (c);
mu is a subcarrier interval of a control resource set with index p of a scheduling cell;
kp,sdetection period for search space set s, op,sIs the detection offset value for the search for the empty set s;
Figure FDA0001813946610000103
the number of time slots in each radio frame in a configuration with a subcarrier spacing of mu.
40. The terminal of claim 39,
and in the scheduling cell and the scheduled cell configured by the terminal, the control resource sets with the same index have the same configuration.
41. A communication device, comprising: memory, processor and computer program stored on the memory and executable on the processor, which when executed by the processor implements the steps of the method according to any of claims 1 to 20.
42. A computer-readable storage medium, characterized in that a computer program is stored on the computer-readable storage medium, which computer program, when being executed by a processor, carries out the steps of the method according to any one of claims 1 to 20.
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