WO2024169712A1

WO2024169712A1 - Pdcch transmission method and apparatus, and communication device

Info

Publication number: WO2024169712A1
Application number: PCT/CN2024/075897
Authority: WO
Inventors: 司倩倩; 高雪娟; 邢艳萍; 赵越
Original assignee: 大唐移动通信设备有限公司
Priority date: 2023-02-13
Filing date: 2024-02-05
Publication date: 2024-08-22
Also published as: CN118488577A

Abstract

The present disclosure provides a PDCCH transmission method and apparatus, and a communication device. The method comprises: under the condition that at least some symbols in a control resource set corresponding to one search space are sub-band full duplex (SBFD) symbols, determining available resources in the control resource set; according to the available resources in the control resource set, determining a target resource for transmitting a physical downlink control channel (PDCCH); and transmitting the PDCCH on the target resource.

Description

A PDCCH transmission method, device and communication equipment

CROSS-REFERENCE TO RELATED APPLICATIONS

This disclosure claims priority to a Chinese patent application filed with the Chinese Patent Office on February 13, 2023, with application number 202310120582.6 and application name “A PDCCH transmission method, apparatus and communication equipment”, the entire contents of which are incorporated by reference in this disclosure.

Technical Field

The present disclosure relates to the field of communication technology, and in particular to a PDCCH transmission method, apparatus and communication equipment.

Background Art

Full-duplex with non-overlapping subbands is currently being studied, that is, the subband used for uplink transmission and the subband used for downlink transmission can exist simultaneously in one frequency band, carrier or part of the bandwidth (Band Width Part, BWP), and the subbands used for sending and receiving do not overlap.

For the control resource set (CORESET) configuration in the subband full duplex (SBFD) system, if it is to be ensured that it is available in both SBFD symbols and full downlink symbols, the frequency domain resources of CORESET need to be restricted to the range of the downlink subband. However, this configuration may limit the physical downlink control channel (PDCCH) capacity in the full downlink symbols.

Therefore, in the SBFD system, how to ensure transmission performance while implementing PDCCH transmission is an urgent problem to be solved.

Summary of the invention

The purpose of the present disclosure is to provide a PDCCH transmission method, apparatus and communication device to solve the problem of how to ensure transmission performance while implementing PDCCH transmission in a full-duplex scenario with non-overlapping subbands in the related art.

In the first aspect, in order to solve the above technical problems, the present disclosure provides a PDCCH transmission method. The following methods are available for you to choose from:

In a case where at least some symbols in a control resource set corresponding to a search space are sub-band full-duplex (SBFD) symbols, determining available resources in the control resource set;

Determining target resources for transmitting a physical downlink control channel PDCCH according to available resources in the control resource set;

The PDCCH is transmitted on the target resource.

Optionally, the determining, according to available resources in the control resource set, a target resource for transmitting a physical downlink control channel PDCCH includes:

After a control channel element (CCE) is mapped onto the control resource set, determining available resource element (RE) resources included in the CCE according to available resources in the control resource set;

The available RE resources included in the CCE are determined as the target resources for transmitting the PDCCH.

Performing CCE mapping on available resources in the control resource set;

The CCE obtained by mapping is determined as the target resource for transmitting the PDCCH.

Optionally, the determining the available resources in the control resource set includes at least one of the following:

If the N resource blocks (RBs) indicated by the first bit in the configuration information of the control resource set are used for the control resource set, and the N resource blocks RBs do not overlap with the uplink subcarrier bandwidth and/or the guard interval, it is determined that the N RBs indicated by the first bit belong to available resources; N is a positive integer;

If the N RBs indicated by the second bit in the configuration information of the control resource set at least partially overlap with the uplink subcarrier bandwidth and/or the guard interval, it is determined that the N RBs indicated by the second bit belong to unavailable resources;

If the N RBs indicated by the third bit in the configuration information of the control resource set are used for the control resource set, and the N resource blocks RBs partially overlap with the uplink subcarrier bandwidth and/or the guard interval, the N RBs indicated by the third bit are divided into M groups, and the RB resources corresponding to the groups that do not overlap with the uplink subcarrier bandwidth and/or the guard interval are determined as available resources. source;

The numerical value M is a ratio of the numerical value N to a first value, and M is a positive integer; the first value is determined by a ratio between the numerical value N and the number of orthogonal frequency division multiplexing (OFDM) symbols occupied by the control resource set in a time slot, or the first value is determined by a ratio between a resource element group (REG) binding size and the number of OFDM symbols occupied by the control resource set in a time slot.

Optionally, in the case where the CCE is mapped to the REG in an interleaved mapping manner, after determining the available resources in the control resource set, the method further includes:

Determining the number of available REG bindings according to available resources in the control resource set;

In the case that the number of available REG bindings cannot be divided by the number of rows of the interleaver, adjusting the number of available REG bindings by a first manner to obtain the number of REG bindings that can be divided by the number of rows of the interleaver;

The first method includes one of the following:

From the available REG bindings, exclude the first X REG bindings; X is a positive integer;

From the available REG bindings, exclude the last X REG bindings;

From the available REG bindings, exclude X REG bindings evenly.

In a second aspect, in order to solve the above technical problems, an embodiment of the present disclosure provides a communication device, including: a transceiver, a memory, a processor, and a computer program stored in the memory and executable on the processor; the processor is used to read the program in the memory and execute the following process:

The PDCCH is transmitted on the target resource.

Optionally, the processor is further configured to read a program in a memory and execute the following process:

After a control channel element CCE is mapped onto the control resource set, determining available RE resources included in the CCE according to available resources in the control resource set;

Performing CCE mapping on available resources in the control resource set;

Optionally, the processor is further configured to read a program in the memory and execute at least one of the following processes:

If the N resource blocks RB indicated by the first bit in the configuration information of the control resource set are used for the control resource set, and the N resource blocks RB do not overlap with the uplink subcarrier bandwidth and/or the guard interval, it is determined that the N RBs indicated by the first bit belong to available resources; N is a positive integer;

If the N RBs indicated by the third bit in the configuration information of the control resource set are used for the control resource set, and the N resource blocks RBs partially overlap with the uplink subcarrier bandwidth and/or the guard interval, the N RBs indicated by the third bit are divided into M groups, and the RB resources corresponding to the groups that do not overlap with the uplink subcarrier bandwidth and/or the guard interval are determined as available resources;

Among them, the numerical value M is the ratio of the numerical value N to the first value, and M is a positive integer; the first value is determined by the ratio between the numerical value N and the number of OFDM symbols occupied by the control resource set in the time slot, or the first value is determined by the ratio between the resource element group REG binding size and the number of OFDM symbols occupied by the control resource set in the time slot.

The first method includes one of the following:

From the available REG bindings, exclude the last X REG bindings;

From the available REG bindings, exclude X REG bindings evenly.

In a third aspect, in order to solve the above technical problem, an embodiment of the present disclosure provides a PDCCH transmission device, including:

A first determination module is used to determine available resources in a control resource set corresponding to a search space when at least part of the symbols in the control resource set are sub-band full-duplex SBFD symbols;

A second determination module, configured to determine a target resource for transmitting a physical downlink control channel PDCCH according to available resources in the control resource set;

A transmission module is used to transmit the PDCCH on the target resource.

In a fourth aspect, in order to solve the above technical problem, the embodiment of the present disclosure provides a processor-readable storage medium, wherein the processor-readable storage medium stores a computer program, and the computer program is used to enable the processor to execute the PDCCH transmission method as described in the first aspect.

The beneficial effects of the above technical solution disclosed in the present invention are as follows:

In the above scheme, when at least part of the symbols in the control resource set corresponding to a search space are sub-band full-duplex SBFD symbols, the available resources in the control resource set are determined; according to the available resources in the control resource set, the target resources for transmitting the physical downlink control channel PDCCH are determined; and the PDCCH is transmitted on the target resources. In this way, the transmission of the PDCCH in the SBFD system can be realized without limiting the frequency domain resources of the control resource set within the range of the downlink subband, and the PDCCH capacity will not be restricted, so that the transmission performance of the PDCCH can be guaranteed.

BRIEF DESCRIPTION OF THE DRAWINGS

FIG1 is a flow chart of a PDCCH transmission method according to an embodiment of the present disclosure;

FIG2 is a schematic diagram of resource mapping according to an embodiment of the present disclosure;

FIG3 is a second schematic diagram of resource mapping according to an embodiment of the present disclosure;

FIG4 is a third schematic diagram of resource mapping according to an embodiment of the present disclosure;

FIG5 is a fourth schematic diagram of resource mapping according to an embodiment of the present disclosure;

FIG6 is a fifth schematic diagram of resource mapping according to an embodiment of the present disclosure;

FIG7 is a block diagram of a PDCCH transmission apparatus according to an embodiment of the present disclosure;

FIG8 is a schematic diagram of the hardware structure of a communication device according to an embodiment of the present disclosure.

DETAILED DESCRIPTION

The following will be combined with the drawings in the embodiments of the present disclosure to clearly and completely describe the technical solutions in the embodiments of the present disclosure. Obviously, the described embodiments are only part of the embodiments of the present disclosure, not all of the embodiments. Based on the embodiments in the present disclosure, all other embodiments obtained by ordinary technicians in this field without making creative work are within the scope of protection of the present disclosure.

In the embodiments of the present disclosure, the term "and/or" describes the association relationship of associated objects, indicating that three relationships may exist. For example, A and/or B may represent three situations: A exists alone, A and B exist at the same time, and B exists alone. The character "/" generally indicates that the associated objects before and after are in an "or" relationship.

The term "plurality" in the embodiments of the present disclosure refers to two or more than two, and other quantifiers are similar thereto.

The terminal device involved in the embodiments of the present disclosure may be a device that provides voice and/or data connectivity to a user, a handheld device with a wireless connection function, or other processing devices connected to a wireless modem. In different systems, the name of the terminal device may also be different. For example, in a 5G system, the terminal device may be called a user equipment (UE). The wireless terminal device can communicate with one or more core networks (CN) via a radio access network (RAN). The wireless terminal device may be a mobile terminal device, such as a mobile phone (or "cellular" phone) and a computer with a mobile terminal device, for example, a portable, pocket-sized, handheld, computer-built-in or vehicle-mounted mobile device, which exchanges language and/or data with the radio access network. For example, Personal Communication Service (PCS) phones, cordless phones, Session Initiated Protocol (SIP) phones, Wireless Local Loop (WLL) stations, Personal Digital Assistant (PDA) and other devices. Wireless terminal devices may also be referred to as systems, subscriber units, subscriber stations, mobile stations, mobile stations, remote stations, access points, remote terminal devices, access terminal devices, user terminal devices, user agents, and user devices, which are not limited in the embodiments of the present disclosure.

The network device involved in the embodiments of the present disclosure may be a base station, which may include multiple cells providing services for terminals. Depending on the specific application scenario, a base station may also be called an access point, or may be a device in an access network that communicates with a wireless terminal device through one or more sectors on an air interface. The network device may be used to convert received air frames to and from Internet Protocol (IP) packets, acting as a router between the wireless terminal device and the rest of the access network, which may include an Internet Protocol (IP) communications network. The network device may also coordinate the management of attributes of the air interface. For example, the network device involved in the embodiments of the present disclosure may be a network device (Base Transceiver Station, BTS) in the Global System for Mobile communications (Global System for Mobile communications, GSM) or Code Division Multiple Access (Code Division Multiple Access, CDMA), or a network device (NodeB) in Wide-band Code Division Multiple Access (WCDMA), or an evolutionary network device (evolutional Node B, eNB or e-NodeB) in the long term evolution (long term evolution, LTE) system, a 5G base station (gNB) in the 5G network architecture (next generation system), or a home evolved Node B (Home evolved Node B, HeNB), a relay node, a home base station (femto), a pico base station (pico), etc., which is not limited in the embodiments of the present disclosure. In some network structures, the network device may include a centralized unit (CU) node and a distributed unit (DU) node, and the centralized unit and the distributed unit may also be arranged geographically separately.

Network devices and terminal devices can each use one or more antennas for multiple input multiple output (MIMO) transmission. MIMO transmission can be single user MIMO (SU-MIMO) or multi-user MIMO (MU-MIMO). Depending on the form and number of antenna combinations, MIMO transmission can be two-dimensional MIMO (2D-MIMO), three-dimensional MIMO (3D-MIMO), full-dimensional MIMO (FD-MIMO) or massive MIMO, or it can be diversity transmission, precoded transmission or beamforming transmission, etc.

The following first introduces the contents involved in the solution provided by the embodiment of the present disclosure.

1. Duplex Mode

The fifth generation new wireless system (5Generation New RAT, 5G NR) supports two duplex communication modes: time division duplex (TDD) and frequency division duplex (FDD). TDD refers to time division duplex mode, and FDD refers to frequency division duplex mode. The TDD mode transmits and receives at different times on the same frequency channel, i.e., the carrier, and distinguishes between the two at different times. The FDD mode sends and receives simultaneously on different frequency channels, distinguishing the uplink and downlink transmission resources by frequency.

5G NR will subsequently support full-duplex with non-overlapping sub-bands, that is, the base station can simultaneously send and receive through different sub-bands within the same frequency band/carrier/BWP, and the sub-bands used for sending and receiving do not overlap.

2. PDCCH in NR

The basic unit that constitutes PDCCH is the control channel element (CCE). A CCE is 6 resource element groups (REGs) in size. CCE is a logical resource and needs to be further mapped to the control resource set (CORESET) through the CCE to REG mapping method. A REG consists of 12 consecutive resource elements (RE) on an OFDM symbol (that is, one RB on an OFDM symbol) and contains 3 demodulation reference signals (DMRS) REs.

Specifically, a UE (terminal) can be configured with multiple CORESETs. CORESET occupies 1 to 3 OFDM symbols in the time domain. The resource granularity in the frequency domain is 6 consecutive RBs in the frequency domain. The RB resources allocated to CORESET are indicated by bit mapping. Each bit corresponds to 6 consecutive RBs in the frequency domain. CORESET is composed of RB groups corresponding to bits indicated as 1.

Furthermore, each CORESET has only one CCE-to-REG mapping mode, which is divided into interleaved mapping and non-interleaved mapping.

In the non-interleaved case, one REG bundle includes 6 REGs, which is equivalent to one CCE, and the two have the same number.

In the interleaving case, a REG bundle contains L REGs. When one symbol is used, L is 2 or 6. When 2 or 3 symbols are used, L is the number of symbols or 6. In the interleaving case, the CCE corresponding to the REG bundle is not one-to-one like the non-interleaved mapping, but it must be interleaved by the interleaver so that the corresponding PDCCH is dispersed in the frequency domain.

Among them, when interleaved mapping is adopted, the mapping relationship between NR-CCE and physical NR-REG is determined by the following formula:

j＝cR+r
r＝0,1,...,R-1
c＝0,1,...,C-1

Wherein, j is the CCE number, C is the number of columns of the interleaver, n _shift is the offset value configured by high-level signaling or the cell ID, L is the REG bundle size, and R is the number of rows of the interleaver. is the number of NR-REGs contained in the CORESET. It should be noted that when configuring the CORESET, the base station needs to ensure that there are no idle units in the interleaver of the CORESET.

PDCCH already supports discontinuous resource allocation in the frequency domain in NR Rel-15. The frequency domain resources of CORESET indicate RB groups of 6 RBs by bit mapping. For the CORESET configuration in the SBFD system, if it is to be available in both SBFD symbols and full downlink symbols, the frequency domain resources of CORESET need to be limited to the range of the downlink subband, but this configuration may limit the PDCCH capacity in the full downlink symbols.

Currently, in a full-duplex scenario where subbands do not overlap, how to perform PDCCH transmission without limiting PDCCH capacity is a technical problem that needs to be solved urgently.

Based on the above, the embodiments of the present disclosure provide a PDCCH transmission method, apparatus and communication device to solve the problem of how to achieve PDCCH transmission while ensuring transmission performance in a full-duplex scenario with non-overlapping sub-bands.

Referring to FIG. 1 , an embodiment of the present disclosure provides a PDCCH transmission method, which specifically includes the following steps:

Step 101: Determine available resources in a control resource set corresponding to a search space when at least part of the control resource set corresponds to a sub-band full-duplex (SBFD) symbol.

It should be noted that a terminal can be configured with multiple control resource sets (CORESETs). If a CORESET occupies multiple OFDM symbols in the time domain, only some of the symbols are SBFD symbols.

The available resources in the control resource set do not overlap with the uplink subcarrier bandwidth and/or the guard interval.

Step 102: Determine target resources for transmitting a physical downlink control channel PDCCH according to available resources in the control resource set.

Step 103: Transmit the PDCCH on the target resource.

It should be noted that the execution subject of the PDCCH transmission method provided in the embodiment of the present disclosure is applicable to both the terminal side and the network device side. When the method is executed by the terminal, the terminal receives the PDCCH sent by the network device on the target resource; when the method is executed by the network device, the network device sends the PDCCH to the terminal through the target resource.

In the above embodiment, the transmission of PDCCH in the SBFD system can be achieved without limiting the frequency domain resources of the control resource set within the range of the downlink subband, and the PDCCH capacity will not be restricted, so that the transmission performance of the PDCCH can be guaranteed.

It should be pointed out that if the control resource set contains uplink symbols, PDCCH transmission is not performed in the control resource set; if the control resource set contains downlink symbols or flexible symbols except SBFD symbols, the target resources for PDCCH transmission can be determined uniformly in accordance with the method in the above embodiment.

The two situations included in the above step 102 are introduced respectively below.

Case 1

In an embodiment of the present disclosure, in the above step 102, determining the target resource for transmitting the physical downlink control channel PDCCH according to the available resources in the control resource set includes:

In this embodiment, the mapping of CCE to REG in the control resource set remains unchanged, that is, when performing CCE to REG mapping, unavailable resources in the control resource set are not excluded. In this mapping method, part of the resources of a CCE may be mapped to unavailable control resources (i.e., resources overlapping with the uplink subband and/or protection interval). Based on this mapping method, the available RE resources contained in the CCE are determined as the target resources for transmitting the PDCCH, and the downlink control information (Downlink Control Information, DCI) needs to be encoded based on the available CCE resources. When mapping PDCCH to CCE, the unavailable CCE resources are skipped. In this way, the transmission of PDCCH in the SBFD system can be realized without limiting the frequency domain resources of the control resource set within the range of the downlink subband, and the PDCCH capacity will not be restricted, which can ensure the transmission performance of the PDCCH.

In a specific example, it is assumed that the control resource set (CORESET) configured by the terminal is in the frequency domain Occupies 72 RBs and 1 OFDM symbol in the time domain, so the control resource set includes 12 CCEs. Assuming that the control resource set uses non-interleaved mapping, in the SBFD symbol, the control resource set includes a total of 12 CCEs.

As shown in Figure 2, CCE#6/7 (CCEs with indexes 6 and 7) completely overlap with the uplink subband, and CCE#8 (CCEs with index 8) partially overlap with the uplink subband. When the CCE resources corresponding to the PDCCH include CCE#6/7/8, mapping is performed only on the available RE resources in the CCE. The available resources here refer to the RB resources within the downlink subband range in the frequency domain, that is, the RB resources that do not overlap with the uplink subband and the protection band.

For example, if the aggregation level of a PDCCH is 4, and the corresponding CCE resources are CCE#4/5/6/7, then since CCE#6/7 overlaps with the uplink subband, this PDCCH can only be mapped on CCE#4/5. The corresponding DCI should also be encoded based on the number of available REs in CCE#4/5, that is, the information after DCI coding and modulation is mapped on 108 RE resources (9 REs on each RB are used to transmit DCI, so a total of 108 REs on 12 RBs can be used for DCI).

For example, the aggregation level of a PDCCH is 4, and the corresponding resources are CCE#8/9/10/11. Since there are 3 RBs in CCE#8 that overlap with the uplink subband, this PDCCH can only be mapped to CCE#9/10/11 and the other 3 RB resources of CCE#8. The corresponding DCI should also be encoded based on the available RB resources of CCE#9/10/11 and CCE#8, that is, the information after DCI coding and modulation is mapped to 189 RE resources (9 REs on each RB are used to transmit DCI, so a total of 189 REs on 21 RBs can be used for DCI).

Case 2

Performing CCE mapping on available resources in the control resource set;

For example, assume that the control resource set (CORESET) configured by the terminal occupies 72 RBs in the frequency domain and 1 OFDM symbol in the time domain. As shown in Figure 3, in the SBFD symbol, since the configured control resource set overlaps with the uplink subband, it is necessary to exclude unavailable resources from the configured control resource set and perform CCE/REG mapping in the remaining available resources. The unavailable resources here refer to the RB resources that overlap with the uplink subband and the guard band in the frequency domain. In this example, assume that In non-interleaved mapping, in SBFD symbols, after removing unavailable resources, the control resource set includes 54 RBs, corresponding to 9 CCEs. CCEs are mapped only in these 54 RBs.

In this embodiment, the target resource for transmitting the physical downlink control channel PDCCH is obtained by mapping CCE to REG based on the available resources in the control resource set. In this way, the mapped CCE must be an available resource that does not overlap with the uplink subband and/or the protection interval. In this way, the transmission of PDCCH in the SBFD system can be achieved without limiting the frequency domain resources of the control resource set within the range of the downlink subband, without limiting the PDCCH capacity, and ensuring the transmission performance of PDCCH.

Furthermore, the above step 101, determining the available resources in the control resource set, includes at least one of the following methods:

Mode 1: If the N resource blocks RB indicated by the first bit in the configuration information of the control resource set are used for the control resource set, and the N resource blocks RB do not overlap with the uplink subcarrier bandwidth and/or the guard interval, it is determined that the N RBs indicated by the first bit belong to available resources; N is a positive integer;

Exemplarily, it is assumed that the control resource set (CORESET) configured by the terminal occupies 72 RBs in the frequency domain and 1 OFDM symbol in the time domain. The control resource set is composed of resource block RB groups indicated by bits with a bit value of 1, taking 1 bit indicating 6 RBs as an example. As shown in Figure 3, there are 12 bits indicated as 1, of which 3 bits indicate RB groups that overlap with the uplink subband (UL subband), and 9 bits indicate RB groups that overlap with the downlink subband (DL subband), that is, the RB groups indicated by the 9 bits do not overlap with the uplink subband. In this way, the RB groups indicated by the 9 bits are all available resources. As shown in Figure 3, the RB groups indicated by the 9 bits can be mapped to CCE#0/1/2/3/4/5/6/7/8.

In the above-mentioned method 1, for the case where the N RB resources indicated by a bit with a bit value of 1 are aligned with the boundary of the uplink subband, when the N RB resources do not overlap with the uplink subcarrier bandwidth and/or the protection interval, the N RB resources are determined as available resources; when the N RB resources overlap with the uplink subcarrier bandwidth, they are determined as unavailable resources.

It should be noted that the above-mentioned first bit represents any bit with a bit value of 1.

Mode 2: If the N RBs indicated by the second bit in the configuration information of the control resource set are used for the control resource set, and the N resource blocks RBs at least partially overlap with the uplink subcarrier bandwidth and/or the guard interval, it is determined that the N RBs indicated by the second bit belong to unavailable resources. source;

Exemplarily, assume that the control resource set (CORESET) configured by the terminal occupies 72 RBs in the frequency domain and 1 OFDM symbol in the time domain. As shown in Figure 4, in the configuration of the control resource set, there are 6 RB granularities (such as the twill filling part in Figure 4) that are not aligned with the uplink subband boundary. In order to ensure that the frequency domain resources of the control resource set are still an integer multiple of 6 RBs, when the 6 RBs indicated by 1 bit are used for the control resource set, and part or all of the 6 RBs do not belong to the downlink subband (DL subband), it is determined that these 6 RBs do not belong to available resources. As shown in Figure 4, if some resources in the 6 RBs at the twill filling position are unavailable, these 6 RBs are considered to be unavailable resources.

It should be noted that the second bit mentioned above represents any bit whose bit value is 1.

In the above-mentioned method 2, for the situation where the N RB resources indicated by a bit with a bit value of 1 are not aligned with the boundary of the uplink subband, when at least part of the N RB resources overlap with the uplink subcarrier bandwidth and/or the protection interval, the N RB resources are determined as unavailable resources.

Mode three: if the N RBs indicated by the third bit in the configuration information of the control resource set are used for the control resource set, and the N resource blocks RBs partially overlap with the uplink subcarrier bandwidth and/or the guard interval, the N RBs indicated by the third bit are divided into M groups, and the RB resources corresponding to the groups that do not overlap with the uplink subcarrier bandwidth and/or the guard interval are determined as available resources;

It should be noted that the third bit mentioned above represents any bit whose bit value is 1.

Example 1: The ratio between the value N and the number of OFDM symbols occupied by the control resource set in the time slot is determined as a first value.

Assume that the terminal is configured with a control resource set (CORESET) that occupies 72 RBs in the frequency domain and 2 OFDM symbols in the time domain, and 1 bit indicates that 6 RBs are used for the control resource set. As shown in Figure 5, in the configuration of the control resource set, the 6 RB granularity corresponding to the 2 OFDM symbols at the twill filling position is not aligned with the uplink subband boundary. In this example, the ratio of 6 to the number of time domain symbols of CORESET can be used as the first value; the frequency domain of the 6 RBs is grouped according to the first value. Divide into multiple RB groups; determine whether each RB group belongs to available resources. Since the number of time domain symbols of CORESET is 2, the frequency domain can determine whether it belongs to available resources according to 3 RBs as a group.

As shown in FIG5, in each OFDM symbol, 2 of the 6 RBs at the twill filling position are unavailable, and the 3 consecutive RBs in the same group as the two unavailable RBs are determined to be unavailable resources, and the remaining 3 RBs are available resources. Further, CCE/REG mapping is performed in the available resources. In the case of non-interleaving, the mapping result of CCE is shown in FIG5, and the unavailable resources are skipped when CCE mapping is performed.

Example 2: Determine a first value as a ratio between a REG bundling size and the number of OFDM symbols occupied by a control resource set in a time slot.

Assume that the control resource set (CORESET) configured by the terminal occupies 72 RBs in the frequency domain and 2 OFDM symbols in the time domain. As shown in Figure 6, in the configuration of CORESET, the corresponding 6 RB granularity at the twill filling position is not aligned with the uplink subband boundary. In this example, the ratio of the REG bundle size (REG bundle size) to the number of time domain symbols of CORESET can be used as the first value; according to the first value, the 6 RBs are grouped; and it is determined whether each RB group belongs to available resources. For example, assuming that the REG bundle size is 2 and the number of time domain symbols of CORESET is 2, the frequency domain can determine whether it belongs to available resources according to 1 RB as a group.

As shown in Figure 6, 2 of the 6 RBs at the twill filling position are unavailable, so it is considered that these 2 RBs are not included in the CORESET, and the remaining 4 RBs belong to the CORESET. CCE/REG mapping is performed in the available resources. Since the REG bundle size will be less than 6 only in the case of interleaving, this example corresponds to the interleaving case, and the corresponding REG bundle mapping is shown in Figure 6. It should be pointed out that the specific CCE to REG bundle mapping depends on the interleaving result, which is not specifically described here.

In the above-mentioned method three, for the case where the N RB resources indicated by a bit with a bit value of 1 are not aligned with the boundary of the uplink subband, when part of the N RB resources overlap with the uplink subcarrier bandwidth and/or the protection interval, the N RB resources are grouped and it is determined whether each group is an available resource.

It should be pointed out that, in specific implementation, when determining the available resources in the control resource set, the above-mentioned method 1 can be used in combination with method 2; or, method 1 can also be used in combination with method 3.

It should be noted that after determining the unavailable resources in the control resource set, the unavailable resources can be Remove from the control resource set. Since the frequency domain resources in the control resource set within the SBFD symbol are adjusted, it may result in that when the control resource set is configured with interleaving mapping, the number of REG bindings cannot be evenly divided by the number of rows of the interleaver. Since the non-duplex system protocol does not support the situation where it cannot be divided evenly, for this situation that occurs in the duplex system, the base station is required to ensure during configuration that the number of REG bindings in the SBFD symbol and the non-SBFD symbol can evenly divide the number of rows of the interleaver, which will lead to increased restrictions on the base station configuration. In response to this problem, the present disclosure provides the following embodiments to achieve adaptive adjustment of the number of REG bindings to ensure that the number of REG bindings in the SBFD symbol and the non-SBFD symbol can evenly divide the number of rows of the interleaver.

Specifically, in an optional embodiment, when the CCE is mapped to the REG in an interleaved mapping manner, after determining the available resources in the control resource set, the method further includes:

The first method includes one of the following:

From the available REG bindings, exclude the last X REG bindings;

From the available REG bindings, exclude X REG bindings evenly.

It should be pointed out that if the number of REG bindings in a non-SBFD symbol is adjusted, the number of REG bindings before the adjustment is determined based on the configuration of the control resource set; if the number of REG bindings in a SBFD symbol is adjusted, the number of REG bindings before the adjustment is determined based on the CORESET after excluding unavailable resources.

Exemplarily, assuming that the control resource set after adjustment (i.e., after excluding unavailable resources) contains a total of 20 REG bindings, the corresponding numbers are 0 to 19, and the number of interleaver rows is 3, then 2 REG bindings need to be excluded so that the number of REG bindings can be divided by 3, specifically including the following methods to adjust the number of REG bindings:

Of the 20 REG bindings, exclude the first 2 REG bindings; or,

Of the 20 REG bindings, exclude the last 2 REG bindings; or,

Among the 20 REG bindings, exclude 2 REG bindings evenly, for example, exclude the first and The 10th REG is bound.

Further, after excluding some REG bindings, the remaining REG bindings are renumbered in sequence.

Referring to FIG. 7 , an embodiment of the present disclosure provides a PDCCH transmission device 700, including:

A first determination module 701 is configured to determine available resources in a control resource set corresponding to a search space when at least some symbols in the control resource set are sub-band full-duplex (SBFD) symbols;

A second determination module 702 is used to determine a target resource for transmitting a physical downlink control channel PDCCH according to available resources in the control resource set;

The transmission module 703 is configured to transmit the PDCCH on the target resource.

Optionally, the second determining module 702 includes:

A first determination submodule is used to determine the available RE resources included in the CCE according to the available resources in the control resource set after the control channel element CCE is mapped to the control resource set;

The second determining submodule is used to determine the available RE resources included in the CCE as the target resources for transmitting the PDCCH.

Optionally, the second determining module 702 includes:

A third determination submodule is used to perform CCE mapping on the available resources in the control resource set;

The fourth determination submodule is used to determine the CCE obtained by mapping as the target resource for transmitting the PDCCH.

Optionally, the first determining module 701 includes at least one of the following:

A fifth determination submodule, configured to determine that the N resource blocks RB indicated by the first bit in the configuration information of the control resource set are available resources if the N resource blocks RB indicated by the first bit are used for the control resource set, and the N resource blocks RB do not overlap with the uplink subcarrier bandwidth and/or the guard interval; N is a positive integer;

a sixth determination submodule, configured to determine that the N RBs indicated by the second bit in the configuration information of the control resource set belong to unavailable resources if there is at least partial overlap between the N RBs indicated by the second bit and the uplink subcarrier bandwidth and/or the guard interval;

The seventh determination submodule is used to determine if the N RBs indicated by the third bit in the configuration information of the control resource set are used for the control resource set, and the N resource blocks RBs are consistent with the uplink subcarrier If there is a partial overlap in bandwidth and/or guard interval, the N RBs indicated by the third bit are divided into M groups, and the RB resources corresponding to the groups that do not overlap with the uplink subcarrier bandwidth and/or guard interval are determined as available resources;

Optionally, the apparatus 700 further includes:

A third determination module, configured to determine the number of available REG bindings according to available resources in the control resource set;

A fourth determination module, configured to adjust the number of available REG bindings by a first method to obtain the number of REG bindings that can be divided by the number of rows of the interleaver when the number of available REG bindings cannot be divided by the number of rows of the interleaver;

The first method includes one of the following:

From the available REG bindings, exclude the last X REG bindings;

From the available REG bindings, exclude X REG bindings evenly.

It should be noted here that the above-mentioned device 700 provided in the embodiment of the present disclosure can implement all the method steps implemented in the above-mentioned embodiment, and can achieve the same technical effect. The parts and beneficial effects of this embodiment that are the same as those in the method embodiment will not be described in detail here.

Referring to FIG8 , an embodiment of the present disclosure provides a communication device, which is optionally a terminal or a network device, including: a processor 810; and a memory 820 connected to the processor 810 via a bus interface, the memory 820 is used to store programs and data used by the processor 810 when performing operations, and the processor 810 calls and executes the programs and data stored in the memory 820. Among them, the transceiver 800 is connected to the bus interface, and is used to receive and send data under the control of the processor 810; the processor 810 is used to read the program in the memory 820 and perform the following processes:

The PDCCH is transmitted on the target resource.

Optionally, the processor 810 is further configured to read a program in the memory 820 and execute the following process:

Performing CCE mapping on available resources in the control resource set;

Optionally, the processor 810 is further configured to read a program in the memory 820 and execute at least one of the following processes:

The value M is the ratio of the value N to the first value, where M is a positive integer; the first value is the ratio of the value N to the number of OFDM symbols occupied by the control resource set in the time slot. Alternatively, the first value is determined by a ratio between a resource element group REG bundling size and the number of OFDM symbols occupied by the control resource set in a time slot.

The first method includes one of the following:

From the available REG bindings, exclude the last X REG bindings;

From the available REG bindings, exclude X REG bindings evenly.

In the above communication device, when at least part of the symbols in the control resource set corresponding to a search space are sub-band full-duplex SBFD symbols, the available resources in the control resource set are determined; according to the available resources in the control resource set, the target resources for transmitting the physical downlink control channel PDCCH are determined; and the PDCCH is transmitted on the target resources. In this way, the transmission of the PDCCH in the SBFD system can be realized without limiting the frequency domain resources of the control resource set within the range of the downlink sub-band, and the PDCCH capacity will not be restricted, so that the transmission performance of the PDCCH can be guaranteed.

Among them, in Figure 8, the bus architecture may include any number of interconnected buses and bridges, specifically one or more processors represented by processor 810 and various circuits of memory represented by memory 820 are linked together. The bus architecture can also link various other circuits such as peripherals, voltage regulators, and power management circuits together, which are all well known in the art, and therefore, are not further described herein. The bus interface provides an interface. The transceiver 800 can be a plurality of components, namely, a transmitter and a receiver, providing a unit for communicating with various other devices on a transmission medium, and these transmission media include transmission media such as wireless channels, wired channels, and optical cables. For different user devices, the user interface can also be an interface that can connect externally or internally to required devices, and the connected devices include but are not limited to keypads, displays, speakers, microphones, joysticks, etc.

The processor 810 is responsible for managing the bus architecture and general processing, and the memory 820 can store data used by the processor 810 when performing operations.

Optionally, processor 810 can be a central processing unit (CPU), an application specific integrated circuit (ASIC), a field programmable gate array (FPGA) or a complex programmable logic device (CPLD), and the processor can also adopt a multi-core architecture.

The processor calls the computer program stored in the memory to execute any of the methods provided by the embodiments of the present disclosure according to the obtained executable instructions. The processor and the memory can also be arranged physically separately.

The present disclosure also provides a processor-readable storage medium, characterized in that the processor-readable storage medium stores a computer program, and the computer program is used to enable the processor to execute the above PDCCH transmission method.

The processor-readable storage medium can be any available medium or data storage device that can be accessed by the processor, including but not limited to magnetic storage (such as floppy disk, hard disk, magnetic tape, magneto-optical disk (MO)), etc.), optical storage (such as compact disk (CD), digital video disk (DVD), Blu-ray disc (BD), high-definition versatile disc (HVD), etc.), and semiconductor memory (such as read-only memory (ROM), erasable programmable read-only memory (EPROM), electrically erasable programmable read-only memory (EEPROM), non-volatile memory (NAND FLASH), solid-state drive (Solid State Disk or Solid State Drive, SSD)), etc.

It should be noted that the division of units in the embodiments of the present disclosure is schematic and is only a logical function division. There may be other division methods in actual implementation. In addition, each functional unit in each embodiment of the present disclosure may be integrated into a processing unit, or each unit may exist physically separately, or two or more units may be integrated into one unit. The above-mentioned integrated unit may be implemented in the form of hardware or in the form of software functional units.

If the integrated unit is implemented in the form of a software functional unit and sold or used as an independent product, it can be stored in a processor-readable storage medium. Based on this understanding, the technical solution of the present disclosure, or the part that contributes to the relevant technology, or all or part of the technical solution can be embodied in the form of a software product. The computer software product is stored in a storage medium and includes several instructions for enabling a computer device (which can be a personal computer, A server, or a network device, etc.) or a processor executes all or part of the steps of the methods described in the various embodiments of the present disclosure. The aforementioned storage medium includes: a USB flash drive, a mobile hard disk, a read-only memory (ROM), a random access memory (RAM), a magnetic disk or an optical disk, and other media that can store program codes.

Those skilled in the art will appreciate that the embodiments of the present disclosure may be provided as methods, systems, or computer program products. Therefore, the present disclosure may take the form of a complete hardware embodiment, a complete software embodiment, or an embodiment combining software and hardware. Moreover, the present disclosure may take the form of a computer program product implemented on one or more computer-usable storage media (including but not limited to disk storage and optical storage, etc.) containing computer-usable program code.

These processor-executable instructions may also be stored in a processor-readable memory that can direct a computer or other programmable data processing device to operate in a specific manner, so that the instructions stored in the processor-readable memory produce a product including an instruction device that implements the functions specified in one or more processes in the flowchart and/or one or more boxes in the block diagram.

These processor-executable instructions may also be loaded onto a computer or other programmable data processing device so that a series of operational steps are executed on the computer or other programmable device to produce a computer-implemented process, whereby the instructions executed on the computer or other programmable device provide steps for implementing the functions specified in one or more flows in the flowchart and/or one or more blocks in the block diagram.

Obviously, those skilled in the art can make various changes and modifications to the present disclosure without departing from the spirit and scope of the present disclosure. Thus, if these modifications and variations of the present disclosure fall within the scope of the claims of the present disclosure and their equivalents, the present disclosure is also intended to include these modifications and variations.

Claims

A physical downlink control channel (PDCCH) transmission method, comprising:

In a case where at least some symbols in a control resource set corresponding to a search space are sub-band full-duplex (SBFD) symbols, determining available resources in the control resource set;

Determining target resources for transmitting a physical downlink control channel PDCCH according to available resources in the control resource set;

The PDCCH is transmitted on the target resource.
The PDCCH transmission method according to claim 1, wherein the step of determining the target resource for transmitting the physical downlink control channel PDCCH according to the available resources in the control resource set comprises:

After a control channel element CCE is mapped onto the control resource set, determining available RE resources included in the CCE according to available resources in the control resource set;

The available RE resources included in the CCE are determined as the target resources for transmitting the PDCCH.
The PDCCH transmission method according to claim 1, wherein the step of determining the target resource for transmitting the physical downlink control channel PDCCH according to the available resources in the control resource set comprises:

Performing CCE mapping on available resources in the control resource set;

The CCE obtained by mapping is determined as the target resource for transmitting the PDCCH.
The PDCCH transmission method according to claim 1, wherein the determining the available resources in the control resource set comprises at least one of the following:

If the N resource blocks RB indicated by the first bit in the configuration information of the control resource set are used for the control resource set, and the N resource blocks RB do not overlap with the uplink subcarrier bandwidth and/or the guard interval, it is determined that the N RBs indicated by the first bit belong to available resources; N is a positive integer;

If the N RBs indicated by the second bit in the configuration information of the control resource set at least partially overlap with the uplink subcarrier bandwidth and/or the guard interval, it is determined that the N RBs indicated by the second bit belong to unavailable resources;

If the N RBs indicated by the third bit in the configuration information of the control resource set are used for the control resource set, and the N resource blocks RBs partially overlap with the uplink subcarrier bandwidth and/or the guard interval, the N RBs indicated by the third bit are divided into M groups, and the RB resources corresponding to the groups that do not overlap with the uplink subcarrier bandwidth and/or the guard interval are determined as available resources;

Among them, the numerical value M is the ratio of the numerical value N to the first value, and M is a positive integer; the first value is determined by the ratio between the numerical value N and the number of OFDM symbols occupied by the control resource set in the time slot, or the first value is determined by the ratio between the resource element group REG binding size and the number of OFDM symbols occupied by the control resource set in the time slot.
The PDCCH transmission method according to claim 1, wherein, when the CCE is mapped to the REG in an interleaved mapping manner, after determining the available resources in the control resource set, the method further comprises:

Determining the number of available REG bindings according to available resources in the control resource set;

In the case that the number of available REG bindings cannot be divided by the number of rows of the interleaver, adjusting the number of REG bindings by a first method to obtain the number of REG bindings that can be divided by the number of rows of the interleaver;

The first method includes one of the following:

From the available REG bindings, exclude the first X REG bindings; X is a positive integer;

From the available REG bindings, exclude the last X REG bindings;

From the available REG bindings, exclude X REG bindings evenly.
A communication device, comprising: a transceiver, a memory, a processor, and a computer program stored in the memory and executable on the processor; the processor is used to read the program in the memory and execute the following process:

Determining available resources in a control resource set corresponding to a search space when at least some symbols in the control resource set are SBFD symbols;

Determining target resources for transmitting a physical downlink control channel PDCCH according to available resources in the control resource set;

The PDCCH is transmitted on the target resource.
The communication device according to claim 6, wherein the processor is further configured to read the storage The program in the device performs the following process:

After a control channel element CCE is mapped onto the control resource set, determining available RE resources included in the CCE according to available resources in the control resource set;

The available RE resources included in the CCE are determined as the target resources for transmitting the PDCCH.
The communication device according to claim 6, wherein the processor is further configured to read a program in a memory and execute the following process:

Performing CCE mapping on available resources in the control resource set;

The CCE obtained by mapping is determined as the target resource for transmitting the PDCCH.
The communication device according to claim 6, wherein the processor is further configured to read a program in a memory and perform at least one of the following processes:

If the N resource blocks RB indicated by the first bit in the configuration information of the control resource set are used for the control resource set, and the N resource blocks RB do not overlap with the uplink subcarrier bandwidth and/or the guard interval, it is determined that the N RBs indicated by the first bit belong to available resources; N is a positive integer;

If the N RBs indicated by the second bit in the configuration information of the control resource set at least partially overlap with the uplink subcarrier bandwidth and/or the guard interval, it is determined that the N RBs indicated by the second bit belong to unavailable resources;

If the N RBs indicated by the third bit in the configuration information of the control resource set are used for the control resource set, and the N resource blocks RBs partially overlap with the uplink subcarrier bandwidth and/or the guard interval, the N RBs indicated by the third bit are divided into M groups, and the RB resources corresponding to the groups that do not overlap with the uplink subcarrier bandwidth and/or the guard interval are determined as available resources;

Among them, the numerical value M is the ratio of the numerical value N to the first value, and M is a positive integer; the first value is determined by the ratio between the numerical value N and the number of OFDM symbols occupied by the control resource set in the time slot, or the first value is determined by the ratio between the resource element group REG binding size and the number of OFDM symbols occupied by the control resource set in the time slot.
The communication device according to claim 6, wherein the processor is further configured to read a program in a memory and execute the following process:

Determining the number of available REG bindings according to available resources in the control resource set;

In the case that the number of available REG bindings cannot be divided by the number of rows of the interleaver, adjusting the number of available REG bindings by a first manner to obtain the number of REG bindings that can be divided by the number of rows of the interleaver;

The first method includes one of the following:

From the available REG bindings, exclude the first X REG bindings; X is a positive integer;

Excluding the last X REG bindings from the available REG bindings;

From the available REG bindings, X REG bindings are evenly excluded.
A PDCCH transmission device, comprising:

A first determination module is used to determine available resources in a control resource set corresponding to a search space when at least part of the symbols in the control resource set are sub-band full-duplex SBFD symbols;

A second determination module, configured to determine a target resource for transmitting a physical downlink control channel PDCCH according to available resources in the control resource set;

A transmission module is used to transmit the PDCCH on the target resource.
The apparatus according to claim 11, wherein the second determining module comprises:

A first determination submodule is used to determine the available RE resources included in the CCE according to the available resources in the control resource set after the control channel element CCE is mapped to the control resource set;

The second determining submodule is used to determine the available RE resources included in the CCE as the target resources for transmitting the PDCCH.
The apparatus according to claim 11, wherein the second determining module comprises:

A third determination submodule is used to perform CCE mapping on the available resources in the control resource set;

The fourth determination submodule is used to determine the CCE obtained by mapping as the target resource for transmitting the PDCCH.
The apparatus according to claim 11, wherein the first determining module comprises at least one of the following:

A fifth determination submodule, configured to determine that the N resource blocks RB indicated by the first bit in the configuration information of the control resource set are available resources if the N resource blocks RB indicated by the first bit are used for the control resource set, and the N resource blocks RB do not overlap with the uplink subcarrier bandwidth and/or the guard interval; N is a positive integer;

a sixth determination submodule, configured to determine that the N RBs indicated by the second bit in the configuration information of the control resource set belong to unavailable resources if there is at least partial overlap between the N RBs indicated by the second bit and the uplink subcarrier bandwidth and/or the guard interval;

A seventh determination submodule, configured to, if the N RBs indicated by the third bit in the configuration information of the control resource set are used for the control resource set, and the N resource blocks RBs partially overlap with the uplink subcarrier bandwidth and/or the guard interval, divide the N RBs indicated by the third bit into M groups, and determine the RB resources corresponding to the group that does not overlap with the uplink subcarrier bandwidth and/or the guard interval as available resources;

Among them, the numerical value M is the ratio of the numerical value N to the first value, and M is a positive integer; the first value is determined by the ratio between the numerical value N and the number of OFDM symbols occupied by the control resource set in the time slot, or the first value is determined by the ratio between the resource element group REG binding size and the number of OFDM symbols occupied by the control resource set in the time slot.
The device according to claim 11, wherein the device further comprises:

A third determination module, configured to determine the number of available REG bindings according to available resources in the control resource set;

A fourth determination module, configured to adjust the number of available REG bindings by a first method to obtain the number of REG bindings that can be divided by the number of rows of the interleaver when the number of available REG bindings cannot be divided by the number of rows of the interleaver;

The first method includes one of the following:

From the available REG bindings, exclude the first X REG bindings; X is a positive integer;

From the available REG bindings, exclude the last X REG bindings;

From the available REG bindings, exclude X REG bindings evenly.
A processor-readable storage medium, characterized in that the processor-readable storage medium stores a computer program, and the computer program is used to enable the processor to execute the PDCCH transmission method according to any one of claims 1 to 5.