Downlink control information transmission method, communication device, and storage medium

Abstract

The present application provides a downlink control information transmission method, a communication device, and a storage medium. The method comprises: determining antenna ports on the basis of an antenna port mapping mode, the antenna ports being multiple antenna ports; and performing data transmission by means of the antenna ports.

Description

Downlink control information transmission method, communication equipment and storage medium Technical Field

[0001] This application relates to the field of communication technology, specifically to a downlink control information transmission method, communication device, and storage medium. Background Technology

[0002] Mobile communication follows a development pattern of one generation of technology every ten years, having already progressed through 1G, 2G, 3G, 4G, and 5G. Each generational leap and each technological advancement has greatly promoted industrial upgrading and socio-economic development. From 1G to 2G, the transition from analog to digital communication was realized, bringing mobile communication into every household. From 2G to 3G, 4G, and 5G, the shift from voice services to data services was achieved, with transmission speeds increasing hundreds of times, promoting the popularization and prosperity of mobile internet applications. With the rapid development of the mobile internet, new services, new businesses, new technologies, and new devices are constantly emerging. The 5G mobile communication system can hardly meet the needs of future flexible and diverse services, making the development of the next-generation mobile communication system, namely the 6G system, urgently necessary.

[0003] 6G, or the sixth-generation mobile communication standard, is a conceptual wireless network mobile communication technology. Currently, the design of a 6G system is still in the candidate technology solicitation phase, and there are no detailed design schemes yet. As a completely new system, the questions of how base stations send downlink control information and how user terminals receive downlink control information need to be studied and resolved. Summary of the Invention

[0004] This application provides a downlink control information transmission method, communication device, and storage medium, realizing downlink control information transmission under a 6G system.

[0005] This application provides a downlink control information transmission method, applied to a communication node, including:

[0006] The antenna port is determined according to the antenna port mapping method, and the antenna port is a multi-antenna port;

[0007] Downlink control information is transmitted at the antenna port.

[0008] This application provides a communication device, including: a memory, and one or more processors;

[0009] The memory is configured to store one or more programs;

[0010] When the one or more programs are executed by the one or more processors, the one or more processors implement the downlink control information transmission method described in any of the above embodiments.

[0011] This application provides a storage medium storing a computer program, which, when executed by a processor, implements the downlink control information transmission method described in any of the above embodiments. Attached Figure Description

[0012] Figure 1 is a flowchart of a downlink control information transmission method provided in an embodiment of this application;

[0013] Figure 2 is a schematic diagram of the interleaving mapping provided in an embodiment of this application;

[0014] Figure 3 is a first schematic diagram of time-division multiplexing of the reference signal of the physical downlink control channel provided in an embodiment of this application;

[0015] Figure 4 is a second schematic diagram of time-division multiplexing of the reference signal of the physical downlink control channel provided in an embodiment of this application;

[0016] Figure 5 is a third schematic diagram of time-division multiplexing of the reference signal of the physical downlink control channel provided in an embodiment of this application;

[0017] Figure 6 is a fourth schematic diagram of time-division multiplexing of the reference signal of the physical downlink control channel provided in an embodiment of this application;

[0018] Figure 7 is a fifth schematic diagram of time-division multiplexing of the reference signal for the physical downlink control channel provided in an embodiment of this application;

[0019] Figure 8 is a sixth schematic diagram of time-division multiplexing of the reference signal of the physical downlink control channel provided in an embodiment of this application;

[0020] Figure 9 is a first schematic diagram of reference signal code division multiplexing for the physical downlink control channel provided in an embodiment of this application;

[0021] Figure 10 is a second schematic diagram of reference signal code division multiplexing for the physical downlink control channel provided in an embodiment of this application;

[0022] Figure 11 is a structural block diagram of a downlink control information transmission method provided in an embodiment of this application;

[0023] Figure 12 is a schematic diagram of the structure of a communication device provided in an embodiment of this application. Detailed Implementation

[0024] To make the objectives, technical solutions, and advantages of this application clearer, the embodiments of this application will be described in detail below with reference to the accompanying drawings. It should be noted that, unless otherwise specified, the embodiments and features described in these embodiments can be arbitrarily combined with each other.

[0025] The steps illustrated in the flowchart in the accompanying drawings can be executed in a computer system such as a set of computer-executable instructions. Furthermore, although a logical order is shown in the flowchart, in some cases the steps shown or described may be performed in a different order than that presented here.

[0026] In New Radio (NR), the Physical Downlink Control Channel (PDCCH) is the only downlink control channel. The PDCCH primarily carries downlink control information (DCI), including resource allocation information for one or more user terminals (UEs), and is used to schedule downlink transmissions on the Physical Downlink Shared Channel (PDSCH) and uplink transmissions on the Physical Uplink Shared Channel (PUSCH).

[0027] The PDCCH processing procedure includes information element multiplexing, cyclic redundancy check addition, polar coding, rate matching, scrambling, modulation, and resource element mapping.

[0028] NR introduces the concept of a Control Resource Set (CORESET) for the PDCCH, which represents the time and frequency resources on which the PDCCH resides. The combination of the CORESET and the search space is used for PDCCH configuration, at both the cell and UE levels. The PDCCH has an antenna port of 2000, and it consistently uses Quadrature Phase Shift Keying (QPSK) for modulation.

[0029] The UE needs to monitor CORESET at specified monitoring times to obtain control information, and this process is achieved by performing blind detection in the configured search space.

[0030] In one embodiment, FIG1 is a flowchart of a downlink control information transmission method provided by an embodiment of this application. This embodiment is applied to the case of downlink control information transmission in a 6G system. This embodiment can be executed by a communication node, which can be a base station or a UE. As shown in FIG1, the downlink control information transmission method in this embodiment includes steps S110 and S120.

[0031] S110. Determine the antenna port according to the antenna port mapping method. The antenna port is a multi-antenna port.

[0032] In this embodiment, when the communication node is a base station, the base station can determine the transmitting antenna port according to the antenna port mapping method; when the communication node is a UE, the UE can determine the receiving antenna port according to the antenna port mapping method.

[0033] In 5G NR, the number of antenna ports of the PDCCH is fixed at 2000, and it can only use single-port transmission. However, the 5G PDSCH can support multi-antenna port transmission. 6G will have more antennas than 5G. Therefore, in order to improve the performance of 6G PDCCH, 6G PDCCH needs to support more antenna port transmission, thereby improving the performance of 6G PDCCH and better realizing the multiplexing of PDCCH and PDSCH.

[0034] In this embodiment, multiple antenna ports can be determined by port mapping according to the antenna port mapping method. The antenna port mapping method can include the mapping method between PDCCH resources and antenna ports.

[0035] S120, Data transmission is performed at the antenna port.

[0036] Data transmission can include both sending and receiving data.

[0037] In this embodiment, when the communication node is a base station, the base station can transmit data on the transmitting antenna port; when the communication node is a UE, the UE can receive data on the receiving antenna port.

[0038] In this embodiment, multiple antenna ports are determined according to the antenna port mapping method so that the 6G PDCCH supports multi-antenna port transmission, thereby improving the performance of the 6G PDCCH and better realizing the multiplexing of PDCCH and PDSCH.

[0039] In one embodiment, the antenna port mapping method includes:

[0040] Antenna port mapping is performed on a resource-by-resource basis within the physical downlink control channel search space; or,

[0041] The mapping between physical downlink control channel resources and antenna ports is performed using time-division multiplexing.

[0042] The search space refers to the set of all possible PDCCH candidate locations at a specific aggregation level. Since the UE does not know in advance the specific parameters used to transmit the PDCCH, such as the aggregation level, the location of the Control Channel Element (CCE) resource, and the format of the downlink control information (DCI) carried, blind detection is required to search for the PDCCH.

[0043] In this embodiment, antenna port mapping based on resources in the physical downlink control channel search space can include: antenna port mapping based on resource elements (REs); antenna port mapping based on resource element groups (REGs) or REG bundles; antenna port mapping based on orthogonal frequency division multiplexing (OFDM) symbols; antenna port mapping based on control channel elements (CCEs) or CCE bundles; antenna port mapping based on virtual resource blocks (VRBs) or VRB bundles; and antenna port mapping based on candidate positions corresponding to an aggregation level of a PDCCH.

[0044] In this embodiment, mapping between physical downlink control channel resources and antenna ports using time-division multiplexing may include: multiplexing multiple antenna ports at the granularity of time-domain OFDM symbols.

[0045] In one embodiment, antenna port mapping is performed on a resource-by-resource basis in the physical downlink control channel search space, including at least one of the following:

[0046] Antenna port mapping is performed on a resource-by-resource basis within the physical downlink control channel search space, including at least one of the following:

[0047] The first mapping method is to map antenna ports in units of resource elements in the physical downlink control channel search space;

[0048] A second mapping method that maps antenna ports based on resource unit groups or bundles of resource unit groups in the physical downlink control channel search space;

[0049] A third mapping method that maps antenna ports using orthogonal frequency division multiplexing symbols in the time domain of the physical downlink control channel search space as units;

[0050] A fourth mapping method that maps antenna ports in units of control channel elements or bundles of control channel elements in the physical downlink control channel search space;

[0051] The fifth mapping method is to map antenna ports in units of virtual resource blocks or bundles of virtual resource blocks in the physical downlink control channel search space;

[0052] The sixth mapping method is to map antenna ports based on candidate positions corresponding to an aggregation level of a physical downlink control channel.

[0053] The Control Channel Element (CCE) is the basic unit that constitutes the PDCCH. Here is an example of the CCE definition: One CCE occupies 6 REGs, comprising a total of 72 frequency domain subcarriers, including 54 data REs and 18 REs used for demodulation reference signals.

[0054] The number of CCEs in a PDCCH is called the aggregation level, and the aggregation level can be 1, 2, 4, 8, 16, etc. The specific number of CCEs in a PDCCH is determined by the aggregation level.

[0055] The CCE-REG mapping method can include interleaved mapping and non-interleaved mapping, with each CORESET configured with one CCE-REG mapping method. Interleaved mapping: The REGs mapped by the CCE are discretely distributed in the frequency domain in units of REG bundles; a REG bundle consists of multiple consecutive REGs in the time and / or frequency domains. A REG bundle can contain 1, 2, 3, or 6 REGs, determined by the number of symbols in the CORESET, and spans all OFDM symbols of the corresponding CORESET. Non-interleaved mapping: All CCEs at a given aggregation level's PDCCH candidate positions are mapped onto consecutive REG bundles.

[0056] Figure 2 is a schematic diagram of the interleaving mapping provided in an embodiment of this application. As shown in Figure 2, a REG occupies 1 OFDM symbol in the time domain and 12 consecutive subcarriers (one resource block) in the frequency domain, i.e., 1 OFDM symbol multiplied by 12 subcarriers; one CCE contains 6 REGs, therefore 1 CCE equals 6 REGs, which equals 72 REs. One PDCCH can be mapped to 1 CCE, 2 CCEs, 4 CCEs, or 8 CCEs; a PDCCH search space refers to the total number of CCEs included in a PDCCH search space.

[0057] In this embodiment, antenna port mapping is performed on the time domain of the physical downlink control channel search space in units of orthogonal frequency division multiplexing (OFDM) symbols. If one or more OFDM symbols correspond to antenna port T, then the antenna port corresponding to the RE used to transmit the PDCCH within that OFDM symbol is T. For example, assuming a PDCCH search space corresponds to n OFDM symbols, and the PDCCH has two antenna ports Z1 and Z2, the n OFDM symbols are divided into two parts: the first part of OFDM symbols corresponds to antenna port Z1, and the second part of OFDM symbols corresponds to antenna port Z2. The n OFDM symbols can be divided sequentially, with the first m OFDM symbols corresponding to the first part and the remaining nm OFDM symbols corresponding to the second part; the n OFDM symbols can also be divided crosswise, with odd-numbered OFDM symbol numbers corresponding to the first part and the remaining OFDM symbol numbers corresponding to the second part. The reference signal corresponding to the antenna port is located on one or more OFDM symbols among the OFDM symbols corresponding to the antenna port. Assume that a PDCCH search space corresponds to n OFDM symbols, and the PDCCH has 4 antenna ports. The n OFDM symbols are divided into four parts, with each part corresponding to one antenna port.

[0058] In one embodiment, an antenna port mapping method based on resource elements of the physical downlink control channel search space includes at least one of the following:

[0059] Map the antenna port of the resource element number corresponding to a physical downlink control channel;

[0060] Map the antenna port of the resource element number corresponding to a resource unit group;

[0061] Map the antenna port of the resource element number corresponding to a control channel element;

[0062] Map the antenna port of the resource element number corresponding to a physical resource block.

[0063] In this embodiment, Method 1 may include: mapping the RE number corresponding to a PDCCH to an antenna port; mapping the RE number corresponding to a REG to an antenna port; mapping the RE number corresponding to a CCE to an antenna port; and mapping the RE number corresponding to a Physical Resource Block (PRB) to an antenna port.

[0064] In one embodiment, mapping the resource element number corresponding to a physical downlink control channel to the antenna port includes at least one of the following:

[0065] Map the resource element number corresponding to a physical downlink control channel within a physical resource block to the antenna port number of the physical downlink control channel within the same physical resource block.

[0066] Map the numbers of all resource elements corresponding to a physical downlink control channel to the antenna port numbers of that physical downlink control channel.

[0067] In this embodiment, the RE corresponding to a PDCCH within a PRB is mapped to the antenna port (reference signal) of the PDCCH within that PRB. The REs within the PRB are numbered in a time-domain first, then frequency-domain order, or vice versa. The antenna ports of the PDCCH are numbered sequentially, and the REs of the numbered PDCCHs within the PRB are mapped to the antenna ports of the numbered PDCCHs in turn. This method ensures a balanced mapping between the REs and antenna ports within a PRB. If a PDCCH maps to one or more REGs within a PRB, port mapping is performed on the REs of the corresponding REGs within that PRB. That is, each PRB is mapped individually, and the corresponding REs within a PRB are mapped jointly.

[0068] In this embodiment, all REs corresponding to a PDCCH are mapped to the antenna ports (reference signals) of that PDCCH. The REs of the PDCCH are numbered in either a time-domain first, then a frequency-domain first, or a frequency-domain first, then a time-domain first. The antenna ports of the PDCCH are then numbered sequentially, and the numbered REs of the PDCCH are mapped to the antenna ports of the PDCCH in turn. This method ensures a balanced mapping between the REs and antenna ports within a PDCCH. If a PDCCH is mapped to one or more REGs of multiple PRBs, the antenna port mapping is performed jointly for the REGs corresponding to the PDCCH within those one or more PRBs.

[0069] In one embodiment, mapping the resource element number corresponding to a resource unit group to the antenna port includes at least one of the following:

[0070] Map the resource element number within a resource unit group to the antenna port number of the physical downlink control channel within the resource unit group;

[0071] Map the resource element numbers within a resource unit bundle to the antenna port numbers of the physical downlink control channels within the same resource unit bundle.

[0072] In this embodiment, REs within a REG are mapped to the PDCCH antenna ports (reference signals) within the PRB containing that REG. The REs within a REG are numbered in either a time-domain first, then a frequency-domain first, or a frequency-domain first, then a time-domain first. The antenna ports of the PDCCH are then numbered sequentially, and the numbered REs of the REG are mapped to the corresponding PDCCH ports in turn. This method ensures a balanced mapping between the REs and antenna ports within a REG.

[0073] In this embodiment, REs within a REG bundle are mapped to the PDCCH antenna ports (reference signals) within the PRB containing that REG. The REs within the REG bundle are numbered in either a time-domain first, then a frequency-domain order, or a frequency-domain first, then a time-domain order. The PDCCH antenna ports are then numbered sequentially, and the REs of the numbered REG bundles are mapped to the corresponding PDCCH ports. This method ensures a balanced mapping between the REs and antenna ports within a REG bundle.

[0074] In one embodiment, mapping the resource element number corresponding to a control channel element to the antenna port includes at least one of the following:

[0075] Map the resource element number within a control channel element to the antenna port number of the physical downlink control channel within the same control channel element.

[0076] Map the resource element number within a control channel unit bundle to the antenna port number of the physical downlink control channel within the physical resource block where the control channel unit within the control channel unit bundle is located.

[0077] In this embodiment, REs within a CCE are mapped to the PDCCH antenna ports (reference signals) within the PRB containing that CCE. The REs within the CCE are numbered in either a time-domain first, then a frequency-domain first, or a frequency-domain first, then a time-domain first. The antenna ports of the PDCCH are then numbered sequentially, and the numbered REs of the CCE are mapped to the corresponding ports of the PDCCH. This method ensures a balanced mapping between the REs and antenna ports within a CCE.

[0078] In this embodiment, REs within a Control Channel Unit (CCE) bundle are mapped to the PDCCH antenna ports (reference signals) within the PRB containing that CCE. The REs within the CCE bundle are numbered in either a time-domain-first, then frequency-domain order, or a frequency-domain-first, then time-domain order. The PDCCH antenna ports are then numbered sequentially, and the numbered REs of the CCE bundle are mapped to the corresponding PDCCH ports. This method ensures a balanced mapping between REs and antenna ports within a CCE bundle.

[0079] In one embodiment, mapping the resource element number corresponding to a physical resource block to the antenna port includes:

[0080] Map the resource element number corresponding to the physical downlink control channel search space within a physical resource block to the antenna port number of the physical downlink control channel within the same physical resource block.

[0081] In this embodiment, the RE numbers corresponding to a PRB are port-mapped: the REs corresponding to the PDCCH search space within a PRB are mapped to the PDCCH antenna ports (reference signals) within that PRB. The REs within the PRB are numbered in either a time-domain-first, frequency-domain-second order, or a frequency-domain-first, time-domain-second order. The antenna ports of the PDCCH are numbered sequentially, and the numbered REs of the PRB are mapped to the corresponding PDCCH ports in turn. This method ensures a balanced mapping between the REs and antenna ports within a PRB. Furthermore, REGs are defined according to OFDM symbols, and a REG contains REs for multiple antenna ports.

[0082] In one embodiment, the second method of antenna port mapping based on resource element groups or resource element bundles in the physical downlink control channel search space includes at least one of the following:

[0083] Map the antenna port of the resource unit group number corresponding to a physical downlink control channel;

[0084] The resource unit group numbers in a physical downlink control channel search space are mapped to antenna ports.

[0085] In this embodiment, Method 2 may include: port mapping of REG numbers corresponding to a PDCCH; port mapping of REG numbers in a PDCCH search space; numbering of OFDM symbols carrying PDCCH in a PDCCH search space, and mapping the numbered OFDM symbols to each antenna port of the PDCCH.

[0086] In one embodiment, mapping the resource element group number corresponding to a physical downlink control channel to the antenna port includes at least one of the following:

[0087] Map the resource unit group number within a physical resource block corresponding to a physical downlink control channel to the antenna port number of the physical downlink control channel;

[0088] Map the resource unit group number corresponding to a physical downlink control channel to the antenna port number of the physical downlink control channel;

[0089] Map the resource unit bundle number corresponding to a physical downlink control channel to the antenna port number of the physical downlink control channel.

[0090] In this embodiment, a PDCCH corresponds to a REG number within a PRB, and the numbered REGs are mapped to the antenna ports of the PDCCH. For example, assuming that the number of REGs within a PRB corresponding to a PDCCH is m1, where m1 is a positive integer such as 1, 2, 3, 6, 12, etc., these REG numbers can be #0, #1, ..., #m1-1, and the PDCCH antenna port numbers are 4001 and 4002, then the antenna ports corresponding to these REGs are 4001, 4002, 4001, 4002, ..., 4001, 4002.

[0091] In this embodiment, the REG number corresponding to a PDCCH is mapped to each antenna port of the PDCCH. For example, assuming that the number of REGs corresponding to a PDCCH is m2, where m2 is a positive integer such as 6, 12, 24, 48, 96, etc., and these REGs are numbered #0, #1, ..., #m2-1, and the PDCCH antenna port numbers are 4001 and 4002, then the antenna ports corresponding to these REGs are 4001, 4002, 4001, 4002, ..., 4001, 4002.

[0092] In this embodiment, a PDCCH is assigned a REG bundle number, and the numbered REG bundles are mapped to the antenna ports of the PDCCH. For example, assuming that the number of REG bundles corresponding to a PDCCH is m3, where m3 is a positive integer such as 2, 3, 6, 12, 24, etc., and these REG bundles are numbered #0, #1, ..., #m3-1, and the PDCCH antenna ports are numbered 4001 and 4002, then the antenna ports corresponding to these REG bundles are 4001, 4002, 4001, 4002, ..., 4001, 4002.

[0093] In one embodiment, mapping the resource element group numbers in a physical downlink control channel search space to antenna ports includes at least one of the following:

[0094] Map a resource unit group number in a physical downlink control channel search space to the antenna port of the physical downlink control channel;

[0095] Map all resource unit group numbers corresponding to a physical downlink control channel search space to the antenna ports of the physical downlink control channel;

[0096] Map all resource element bundle numbers in a physical downlink control channel search space to the antenna ports of that physical downlink control channel.

[0097] The numbering method of the resource element group number in a physical downlink control channel search space is similar to that of the resource element group number corresponding to a physical downlink control channel. The difference is that the range of the numbering changes from the REG corresponding to a PDCCH to the REG corresponding to a PDCCH search space. A PDCCH search space can transmit one or more PDCCHs. A PDCCH will select a portion of the CCE resources of a PDCCH search space to transmit the PDCCH.

[0098] In this embodiment, the REG numbers within a PRB in a PDCCH search space are mapped to each antenna port of the PDCCH.

[0099] In this embodiment, all REG numbers corresponding to a PDCCH search space are mapped to each antenna port of the PDCCH.

[0100] In this embodiment, all REG bundles in the PDCCH search space are numbered, and the numbered REG bundles are mapped to each antenna port of the PDCCH.

[0101] In one embodiment, the method of antenna port mapping based on control channel elements or bundles of control channel elements in the physical downlink control channel search space includes at least one of the following:

[0102] Map the control channel element number corresponding to a physical downlink control channel to the antenna port number of the physical downlink control channel;

[0103] Map the control channel element number corresponding to a physical downlink control channel search space to the antenna port number of the physical downlink control channel;

[0104] Map the control channel element bundle number corresponding to a physical downlink control channel to the antenna port number of the physical downlink control channel;

[0105] Map the control channel element bundle number corresponding to a physical downlink control channel search space to the antenna port number of the physical downlink control channel.

[0106] In this embodiment, the CCE number corresponding to a PDCCH is mapped to the antenna port. For example, if the number of CCEs corresponding to a PDCCH is L, then the CCE numbers corresponding to the PDCCH are #0, #1, ..., #L-1. The antenna ports of the PDCCH are numbered; the numbered CCEs are mapped to each antenna port. Assuming the antenna ports are 2001, 2002, 2003, 2004, then the antenna ports corresponding to CCE numbers #0, #1, ..., #L-1 are 2001, 2002, 2003, 2004, 2001, 2002, 2003, 2004, ..., 2001, 2002, 2003, 2004, respectively.

[0107] In this embodiment, the CCE numbers corresponding to a PDCCH search space are mapped to antenna ports. For example, if a PDCCH search space has 64 CCEs, and all CCEs are numbered #0, #1, ..., #63, and the antenna ports are numbered 2001, 2002, 2003, 2004, using cyclic mapping, then the antenna port numbers corresponding to the candidate position numbers #0, #1, ..., #63 are 2001, 2002, 2003, 2004, 2001, 2002, 2003, 2004, ..., 2001, 2002, 2003, 2004, respectively.

[0108] In this embodiment, the CCE bundle number corresponding to a PDCCH is port-mapped. For example, if a PDCCH corresponds to CCE bundle L, then the CCE bundle number corresponding to the PDCCH is #0, #1, ..., #L-1. The antenna ports of the PDCCH are numbered; the numbered CCE bundles are mapped to each antenna port. Assuming the antenna ports are 2001, 2002, 2003, 2004, then the CCE bundle numbers are #0, #1, ..., #L-1, and the corresponding antenna ports are 2001, 2002, 2003, 2004, 2001, 2002, 2003, 2004, ..., 2001, 2002, 2003, 2004.

[0109] In this embodiment, the CCE bundle number corresponding to a PDCCH search space is port-mapped. For example, if a PDCCH search space has 32 CCEs, and all CCEs are numbered #0, #1, ..., #31, and the antenna port numbers are 1001, 1002, 1003, 1004, then by using cyclic mapping, the antenna port numbers corresponding to the candidate position numbers #0, #1, ..., #31 are 1001, 1002, 1003, 1004, 1001, 1002, 1003, 1004, ..., 1001, 1002, 1003, 1004, respectively.

[0110] In one embodiment, the method of antenna port mapping based on virtual resource blocks or bundles of virtual resource blocks in the physical downlink control channel search space includes at least one of the following:

[0111] Map the virtual resource block number corresponding to a physical downlink control channel to the antenna port number of the physical downlink control channel;

[0112] Map the virtual resource block number corresponding to a physical downlink control channel search space to the antenna port number of the physical downlink control channel;

[0113] Map the virtual resource block bundle number corresponding to a physical downlink control channel to the antenna port number of the physical downlink control channel;

[0114] Map the virtual resource block bundle number corresponding to a physical downlink control channel search space to the antenna port number of the physical downlink control channel.

[0115] In this embodiment, antenna port mapping is performed on a VRB or VRB bundle basis. If a VRB or VRB bundle corresponds to an antenna port T, then the antenna port corresponding to the RE used to transmit the PDCCH within the VRB or VRB bundle is T.

[0116] This process involves mapping the VRB number corresponding to a PDCCH to the antenna ports. For example, if a PDCCH corresponds to VRB L, then the VRB numbers for that PDCCH are #0, #1, ..., #L-1. The antenna ports of the PDCCH are then numbered. The numbered VRBs are then mapped to the respective antenna ports. Assuming the antenna ports are 2001, 2002, 2003, 2004, then the antenna ports corresponding to VRB numbers #0, #1, ..., #L-1 are 2001, 2002, 2003, 2004, 2001, 2002, 2003, 2004, ..., 2001, 2002, 2003, 2004, respectively.

[0117] Specifically, the VRB numbers corresponding to a PDCCH search space are mapped to antenna ports. For example, if a PDCCH search space has 32 VRBs, and all VRBs are numbered #0, #1, ..., #31, and the antenna ports are numbered 1001, 1002, 1003, 1004, then by using cyclic mapping, the candidate position numbers #0, #1, ..., #31 will correspond to the antenna port numbers 1001, 1002, 1003, 1004, 1001, 1002, 1003, 1004, ..., 1001, 1002, 1003, 1004, respectively.

[0118] This process involves mapping the VRB bundle number corresponding to a PDCCH to the antenna ports. For example, if a PDCCH corresponds to VRB bundle L, then the VRB bundle numbers for that PDCCH are #0, #1, ..., #L-1. The antenna ports of the PDCCH are then numbered. The numbered VRB bundles are then mapped to the respective antenna ports. Assuming the antenna ports are 2001, 2002, 2003, 2004, then the VRB bundle numbers are #0, #1, ..., #L-1, and the corresponding antenna ports are 2001, 2002, 2003, 2004, 2001, 2002, 2003, 2004, ..., 2001, 2002, 2003, 2004.

[0119] Specifically, the VRB bundle numbers corresponding to a PDCCH search space are mapped to antenna ports. For example, if a PDCCH search space has 32 VRBs, and all VRBs are numbered #0, #1, ..., #31, and the antenna ports are numbered 1001, 1002, 1003, 1004, then by using cyclic mapping, the candidate position numbers #0, #1, ..., #31 will correspond to the antenna port numbers 1001, 1002, 1003, 1004, 1001, 1002, 1003, 1004, ..., 1001, 1002, 1003, 1004, respectively.

[0120] In one embodiment, the method of antenna port mapping based on candidate locations corresponding to an aggregation level of a physical downlink control channel includes at least one of the following:

[0121] Map the candidate location number corresponding to an aggregation level of a physical downlink control channel to the antenna port number of the physical downlink control channel;

[0122] Map all candidate location numbers corresponding to an aggregation level in a physical downlink control channel search space to the antenna port numbers of the physical downlink control channel.

[0123] In this embodiment, port mapping is performed on a unit of candidate positions corresponding to an aggregation level of a PDCCH. If an antenna port T is corresponding to a candidate position corresponding to an aggregation level of a PDCCH, then the antenna port corresponding to the RE used to transmit the PDCCH within that candidate position is T.

[0124] Specifically, a port mapping is performed on the candidate position number corresponding to an aggregation level of a PDCCH. For example, when the aggregation level of a PDCCH is L and the number of candidate positions is n, the candidate position numbers are #0, #1, ..., #n-1. The antenna ports of the PDCCH are numbered. The candidate position numbers are then mapped sequentially to each antenna port. Assuming that the antenna port numbers are 1001 and 1002, using a cyclic mapping, the candidate position numbers #0, #1, ..., #n-1 correspond to the antenna port numbers 1001, 1002, 1001, 1002, ..., 1001, 1002, respectively.

[0125] This process involves numbering all candidate positions corresponding to a certain aggregation level in a PDCCH search space, and then port mapping these candidate positions. For example, if a PDCCH search space has 32 CCEs, and the aggregation level is 4, the total number of candidate positions corresponding to aggregation level 4 in this PDCCH search space is 8, with candidate position numbers #0, #1, ..., #7, and antenna port numbers 1001, 1002, 1003, and 1004. Using cyclic mapping, the antenna port numbers corresponding to candidate position numbers #0, #1, ..., #7 are 1001, 1002, 1003, 1004, 1001, 1002, 1003, 1004, and 1001, 1002, 1003, 1004, respectively.

[0126] In this embodiment, each aggregation level corresponds to an antenna port set, including one or more ports, which can be configured individually or use the same antenna port set; the antenna port set corresponding to each search space is configured independently; the number of antenna ports can be configured, and the starting value of the antenna ports can be predefined, such as: the PDCCH antenna port starts from 5001. If the number of antenna ports is configured to 4, then the PDCCH antenna ports are 5001, 5002, 5003, and 5004. Alternatively, the number of antenna ports can be configured using a bitmap method, with a predefined starting antenna port, and each bit corresponding to one antenna port.

[0127] In one embodiment, if the physical downlink control channel adopts a single-port transmission scenario, the physical downlink control channel determines the antenna port using at least one of the third to sixth mapping methods.

[0128] In this embodiment, when the PDCCH adopts a single-port transmission scenario, the PDCCH can use any one of the third to sixth mapping methods to determine the antenna port.

[0129] In one embodiment, the antenna port of the physical downlink control channel is determined by one or more of the following methods:

[0130] Determined based on the antenna port corresponding to the candidate location index of the physical downlink control channel;

[0131] The antenna port is determined based on the smallest control channel element index in the control channel element index of the physical downlink control channel.

[0132] Determined based on the antenna port corresponding to the largest control channel element index in the control channel element index of the physical downlink control channel;

[0133] The antenna port is determined based on the smallest control channel unit bundle index in the control channel unit bundle index of the physical downlink control channel.

[0134] The antenna port is determined based on the largest control channel unit bundle index in the control channel unit bundle index of the physical downlink control channel.

[0135] Determined based on the antenna port corresponding to the smallest virtual resource block index in the virtual resource block index corresponding to the physical downlink control channel;

[0136] Determined based on the antenna port corresponding to the largest virtual resource block index in the virtual resource block index corresponding to the physical downlink control channel;

[0137] Determined based on the antenna port corresponding to the smallest virtual resource block bundle index in the virtual resource block bundle index of the physical downlink control channel;

[0138] The antenna port is determined based on the largest virtual resource block bundle index in the virtual resource block bundle index corresponding to the physical downlink control channel.

[0139] In this embodiment, the PDCCH is determined based on the antenna port corresponding to its corresponding candidate position index, or based on the antenna port corresponding to the smallest or largest CCE index in its corresponding CCE index, or based on the antenna port corresponding to the smallest or largest CCE bundle index in its corresponding CCE bundle index; or based on the antenna port corresponding to the smallest or largest VRB index in its corresponding VRB index, or based on the antenna port corresponding to the smallest or largest VRB bundle index in its corresponding VRB bundle index.

[0140] In one embodiment, if the physical downlink control channel adopts a multi-port transmission scenario, the physical downlink control channel determines the antenna port using at least one of the first mapping method to the third mapping method.

[0141] In this embodiment, when the PDCCH uses a multi-port transmission scenario, the antenna port of the PDCCH can be determined using any one of the first mapping method to the third mapping method. Each PDCCH uses multiple antenna ports for transmission; at this time, the reference signal sequence corresponding to the PDCCH antenna port is different from the PDSCH reference signal sequence, and a dedicated reference signal sequence is used; through multi-port mapping, different ports can be corresponding to the PDCCH of different terminals, thereby reducing the interference between reference signals when different terminals use spatial multiplexing and improving the spatial multiplexing performance between the PDCCHs of different terminals.

[0142] In one embodiment, the correspondence of a resource unit group includes at least one of the following:

[0143] At least two consecutive orthogonal frequency division multiplexing symbols within a physical resource block correspond to a resource unit group;

[0144] Within a physical resource block, a first preset number of resource elements of an orthogonal frequency division multiplexing symbol correspond to a resource unit group.

[0145] In this embodiment, the Resource Unit Group (REG) can be regarded as the smallest unit of the PDCCH. The definition of REG in 6G can be the same as or different from the definition of REG in 5G.

[0146] For example, a REG or CCE is defined based on n consecutive OFDM symbols within a PRB, where n has preferred values ​​of 2, 3, 4, 6, 7, 10, 12, or 14, etc. The reference signal of the REG is located on one or more OFDM symbols. The OFDM symbols where the reference signal is located can be predefined or configured by signaling. The number of OFDM symbols occupied by the reference signal is determined according to the number of OFDM symbols m1 corresponding to the PDCCH search space. For example, when m1≤4, the number of OFDM symbols occupied by the reference signal is m1 or 1; when m1>4, the number of OFDM symbols occupied by the reference signal is 2, 3, or 4, or floor(m1 / m2), where m2 is preferably 2, 3, or 4.

[0147] For example, a REG is defined by four REs in an OFDM symbol. In this REG, one RE is the reference signal, and the data and the reference signal are located at the same antenna port.

[0148] In one embodiment, the correspondence of a control channel element includes at least one of the following:

[0149] At least two consecutive orthogonal frequency division multiplexing symbols within a physical resource block correspond to one control channel element;

[0150] A second preset number of virtual resource blocks within a physical resource block correspond to at least one control channel element.

[0151] In this embodiment, one VRB is considered as one CCE, or one VRB corresponds to two CCEs, or n VRBs correspond to one CCE. The specific number can be determined based on the number of time-domain symbols corresponding to the VRB.

[0152] In one embodiment, mapping the resources of the physical downlink control channel to the antenna ports in a time-division multiplexing manner includes at least one of the following:

[0153] Mapping begins with the orthogonal frequency division multiplexing (OFDM) symbol at the start of the physical downlink control channel in the time domain, following the OFDM symbol index sequentially.

[0154] Mapping begins from the nth orthogonal frequency division multiplexing symbol in the initial time domain of the physical downlink control channel, and proceeds sequentially according to the orthogonal frequency division multiplexing symbol index, where n is a preset value or configured by signaling.

[0155] The orthogonal frequency division multiplexing symbol numbers carrying the physical downlink control channel in a physical downlink control channel search space are mapped to the antenna ports.

[0156] Define multiple ports for mapping within the resource unit bundle.

[0157] In this embodiment, mapping is performed sequentially according to the OFDM symbol index, starting from the starting time domain OFDM symbol of PDCCH. This can be done cyclically or with reserved intervals. Alternatively, mapping can be performed sequentially according to the OFDM symbol index, starting from the nth OFDM symbol. This can be done cyclically or with reserved intervals. The RS position RE on the OFDM symbol without a mapped RS is reserved. n is a predefined or signaling configuration.

[0158] In this embodiment, defining multiple ports for mapping within a resource unit bundle can be understood as a REG bundle including multiple REGs, and a REG including multiple REs. Antenna ports can be mapped one REG at a time, or one RE at a time.

[0159] In one embodiment, the mapping relationship between the reference signals of the plurality of antenna ports includes at least one of the following:

[0160] Time-division multiplexing of reference signals from multiple antenna ports; code-division multiplexing of reference signals from multiple antenna ports.

[0161] In this embodiment, there are two multiplexing relationships between the reference signals of multiple antenna ports: time division multiplexing and code division multiplexing.

[0162] In one embodiment, the time-division multiplexing of reference signals for multiple antenna ports includes at least one of the following:

[0163] Time-division multiplexing of reference signals for multiple antenna ports is performed using orthogonal frequency division multiplexing symbols in the time domain as granular ports;

[0164] Time-division multiplexing of reference signals for multiple antenna ports is performed using multiple antenna ports defined within the resource unit bundle.

[0165] Figure 3 is a first schematic diagram of time-division multiplexing of the reference signal of the physical downlink control channel provided in an embodiment of this application; Figure 4 is a second schematic diagram of time-division multiplexing of the reference signal of the physical downlink control channel provided in an embodiment of this application; Figure 5 is a third schematic diagram of time-division multiplexing of the reference signal of the physical downlink control channel provided in an embodiment of this application; Figure 6 is a fourth schematic diagram of time-division multiplexing of the reference signal of the physical downlink control channel provided in an embodiment of this application; Figure 7 is a fifth schematic diagram of time-division multiplexing of the reference signal of the physical downlink control channel provided in an embodiment of this application; and Figure 8 is a sixth schematic diagram of time-division multiplexing of the reference signal of the physical downlink control channel provided in an embodiment of this application.

[0166] In one embodiment, code division multiplexing of reference signals at multiple antenna ports includes:

[0167] Code division multiplexing of reference signals for multiple antenna ports is performed using time-domain spreading codes as the granularity port.

[0168] For example, the multiplexing of two reference signals in two long time-domain spreading code time slots, such as the reference signal of antenna port #0 and the reference signal of antenna port #1, and the reference signal of antenna port #2 and the reference signal of antenna port #3, can also be used as the multiplexing of four reference signals in four long time-domain spreading code time slots, such as the reference signal of antenna port #0, the reference signal of antenna port #1, the reference signal of antenna port #2 and the reference signal of antenna port #3.

[0169] In one embodiment, code division multiplexing of reference signals for multiple antenna ports using time-domain spreading codes as the granularity port includes:

[0170] When a resource unit group consists of a third preset number of orthogonal frequency division multiplexing symbols, a spreading code of a third preset number of length in the time domain is used for code division multiplexing of the reference signals of the third preset number of antenna ports; or,

[0171] When a resource unit bundle consists of a third preset number of orthogonal frequency division multiplexing symbols, a spreading code of a third preset number of length in the time domain is used to perform code division multiplexing of the reference signals of the third preset number of antenna ports.

[0172] The third preset quantity can be 2 or 4.

[0173] For example, four OFDM symbols form one REG or one REG bundle, using a time-domain 4-length spreading code to multiplex four reference signals. The PDCCH occupies 12 OFDM symbols and is located in the first 12 OFDM symbols or the last 12 OFDM symbols of the time slot. It can be divided into three REGs or REG bundles, as shown in Figure 9. Figure 9 is a first schematic diagram of reference signal code division multiplexing of the physical downlink control channel provided in the embodiment of this application.

[0174] For example, two OFDM symbols are one REG or one REG bundle, using a time-domain 2-length spreading code, multiplexing two reference signals, and the PDCCH occupies 14 OFDM symbols, which can be divided into 7 REGs or 7 REG bundles, as shown in Figure 10. Figure 10 is a second schematic diagram of reference signal code division multiplexing of the physical downlink control channel provided in the embodiment of this application.

[0175] In one embodiment, the time-division multiplexing of the reference signals of multiple antenna ports satisfies at least one of the following conditions:

[0176] The reference signals of the multiple antenna ports are time-division multiplexed;

[0177] The frequency domain resource units of the reference signals transmitted on each time domain symbol of the physical downlink control channel search space are the same;

[0178] A CCE or CCE bundle includes reference signal resources for multiple antenna ports;

[0179] The reference signal of the antenna port is transmitted on each time domain symbol of the physical downlink control channel search space;

[0180] Resources are reserved on the time-domain symbols of the physical downlink control channel search space for the transmission of reference signals at the antenna ports.

[0181] The reserved resources are shown in Figures 4 and 5.

[0182] Specifically, when the number of OFDM symbols occupied by the PDCCH is at least one of 2, 4, 6, 8, 10, 12, or 14, or when the PDCCH is a single port, the number of OFDM symbols occupied is 1, 2, or 3, and when the PDCCH is a two-port port, the number of OFDM symbols occupied is at least one of 2, 4, 6, 8, 10, 12, or 14.

[0183] In one embodiment, if the plurality of antenna ports are two-antenna ports, then the orthogonal frequency division multiplexing symbol where the reference signal of the two-antenna port is located is predefined or determined based on the cell identifier.

[0184] In this embodiment, the PDCCH in the PDCCH search space configured by the main information block is transmitted using a fixed 2 antenna ports. The OFDM symbol of the reference signal corresponding to the antenna port is predefined or determined based on the cell ID. For example, the OFDM symbols corresponding to the PDCCH search space are numbered, and the starting symbol (or time-domain offset of the reference signal pattern) of the OFDM symbol of the reference signal corresponding to the antenna port is floor(CellID mod m3), where m3 is a predefined value, such as 2, 3, 4, etc.

[0185] In one embodiment, the location of a portion of the multiple antenna ports and the orthogonal frequency division multiplexing symbol containing the reference signal of the portion of the antenna ports is configured by a system message block or radio resource control.

[0186] In this embodiment, for other PDCCHs, SIB or RRC is used to configure their antenna ports and the OFDM symbol positions of the reference signals corresponding to the antenna ports.

[0187] In one embodiment, the method further includes: when the antenna port corresponding to the physical downlink control channel is the same as or has a quasi-co-location relationship with the antenna port corresponding to the physical downlink shared channel, the reference signals of the physical downlink control channel and the physical downlink shared channel located in the same physical resource block or physical resource block bundle are multiplexed.

[0188] In this embodiment, the signaling configuration can determine whether the corresponding antenna ports of PDSCH and PDCCH are the same, or the signaling configuration can determine the quasi-co-addressable QCL relationship between the PDSCH antenna ports and PDCCH antenna ports. When the antenna ports of PDSCH and PDCCH are the same, the reference signal sequence corresponding to the PDCCH antenna port is the same as the PDSCH reference signal sequence.

[0189] In one embodiment, if the reference signals of the physical downlink control channel and the physical downlink shared channel are multiplexed within the same physical resource block or physical resource block bundle, then a portion of the resources of the physical downlink shared channel that do not transmit reference signals are used to transmit data of the physical downlink shared channel.

[0190] In this embodiment, when the corresponding antenna ports of PDSCH and PDCCH are the same or have a QCL relationship, the reference signals of PDSCH and PDCCH located in the same PRB or PRB bundle resources can be multiplexed. Some reference signals of PDSCH are not transmitted, and these resources that do not transmit reference signals can be used to transmit PDSCH data.

[0191] In one embodiment, the relationship between the location of some orthogonal frequency division multiplexing (OFDM) symbols in the time domain that do not transmit reference signals and the OFDM symbols in the time domain of the physical downlink shared channel includes at least one of the following:

[0192] The positions of the orthogonal frequency division multiplexing symbols in the time domain that do not transmit reference signals overlap with the orthogonal frequency division multiplexing symbols in the time domain of the physical downlink shared channel;

[0193] The position of the orthogonal frequency division multiplexing symbol in the time domain that does not transmit reference signals is less than the interval between the time domain symbol of the physical downlink control channel and the first threshold.

[0194] The position of the orthogonal frequency division multiplexing symbol in the time domain that does not transmit the reference signal is less than the second threshold interval between the time domain symbol of the reference signal of the physical downlink control channel;

[0195] Wherein, the second threshold is greater than the first threshold.

[0196] In this embodiment, the positions of some time-domain OFDM symbols that do not transmit reference signals overlap with the time-domain OFDM symbols of the PDCCH; or, the interval between the positions of the some time-domain OFDM symbols that do not transmit reference signals and the time-domain OFDM symbols of the PDCCH is less than a first threshold; or, the interval between the positions of the some time-domain OFDM symbols that do not transmit reference signals and the time-domain OFDM symbols where the reference signal of the PDCCH is located is less than a second threshold.

[0197] For example, the reference signal of the PDSCH is located on the second, sixth, and tenth OFDM symbols of the PDSCH. When a PDSCH is mapped to all symbols of a time slot (assuming there are fourteen OFDM symbols), the reference signal of the PDSCH is located on the second, sixth, and tenth OFDM symbols of the time slot, and the search space of the PDCCH is located on the third, fourth, and fifth OFDM symbols of the time slot. The PDCCH uses single-port transmission, and the reference signal of the PDCCH is located on the second, sixth, and tenth OFDM symbols of the time slot. In the third and fifth OFDM symbols of the time slot, assuming the first threshold is 2 or the second threshold is 3, the intervals between the PDSCH reference signal and the PDCCH time domain symbols are 1, 1, and 5, respectively. The intervals between the PDSCH reference signal and the PDCCH reference signal (the PDCCH reference signal that is closest to the PDSCH reference signal in the time domain) in the time domain symbols are 1, 1, and 5, respectively. The reference signals on the second and sixth OFDM symbols of the PDSCH are not transmitted, and these resources that do not transmit reference signals are used to transmit PDSCH data.

[0198] In one embodiment, FIG11 is a structural block diagram of a downlink control information transmission method provided in this application. The embodiment is applied to a communication node. As shown in FIG11, the downlink control information transmission device in this embodiment includes: a determining module 110 and a transmission module 120.

[0199] The determining module 110 is configured to determine the antenna port according to the antenna port mapping method, wherein the antenna port is a multi-antenna port;

[0200] The transmission module 120 is configured to transmit downlink control information at the antenna port.

[0201] In one embodiment, the antenna port mapping method includes:

[0202] Antenna port mapping is performed on a resource-by-resource basis within the physical downlink control channel search space; or,

[0203] The mapping between physical downlink control channel resources and antenna ports is performed using time-division multiplexing.

[0204] In one embodiment, the antenna port mapping based on resources of the physical downlink control channel search space includes at least one of the following:

[0205] The first mapping method is to map antenna ports in units of resource elements in the physical downlink control channel search space;

[0206] A second mapping method that maps antenna ports based on resource unit groups or bundles of resource unit groups in the physical downlink control channel search space;

[0207] A third mapping method that maps antenna ports using orthogonal frequency division multiplexing symbols in the time domain of the physical downlink control channel search space as units;

[0208] A fourth mapping method that maps antenna ports in units of control channel elements or bundles of control channel elements in the physical downlink control channel search space;

[0209] The fifth mapping method is to map antenna ports in units of virtual resource blocks or bundles of virtual resource blocks in the physical downlink control channel search space;

[0210] The sixth mapping method is to map antenna ports based on candidate positions corresponding to an aggregation level of a physical downlink control channel.

[0211] In one embodiment, the method of mapping antenna ports in units of resource elements of the physical downlink control channel search space includes at least one of the following:

[0212] Map the antenna port of the resource element number corresponding to a physical downlink control channel;

[0213] Map the antenna port of the resource element number corresponding to a resource unit group;

[0214] Map the antenna port of the resource element number corresponding to a control channel element;

[0215] Map the antenna port of the resource element number corresponding to a physical resource block.

[0216] In one embodiment, mapping the resource element number corresponding to a physical downlink control channel to the antenna port includes at least one of the following:

[0217] Map the resource element number corresponding to a physical downlink control channel within a physical resource block to the antenna port number of the physical downlink control channel within the same physical resource block.

[0218] Map the numbers of all resource elements corresponding to a physical downlink control channel to the antenna port numbers of that physical downlink control channel.

[0219] In one embodiment, mapping the resource element number corresponding to a resource unit group to the antenna port includes at least one of the following:

[0220] Map the resource element number within a resource unit group to the antenna port number of the physical downlink control channel within the resource unit group;

[0221] Map the resource element numbers within a resource unit bundle to the antenna port numbers of the physical downlink control channels within the same resource unit bundle.

[0222] In one embodiment, mapping the resource element number corresponding to a control channel element to the antenna port includes at least one of the following:

[0223] Map the resource element number within a control channel element to the antenna port number of the physical downlink control channel within the same control channel element.

[0224] Map the resource element number within a control channel unit bundle to the antenna port number of the physical downlink control channel within the physical resource block where the control channel unit within the control channel unit bundle is located.

[0225] In one embodiment, mapping the resource element number corresponding to a physical resource block to the antenna port includes:

[0226] Map the resource element number corresponding to the physical downlink control channel search space within a physical resource block to the antenna port number of the physical downlink control channel within the same physical resource block.

[0227] In one embodiment, the second method of antenna port mapping based on resource element groups or resource element bundles in the physical downlink control channel search space includes at least one of the following:

[0228] Map the antenna port of the resource unit group number corresponding to a physical downlink control channel;

[0229] The resource unit group numbers in a physical downlink control channel search space are mapped to antenna ports.

[0230] In one embodiment, the process of mapping the resource element group number corresponding to a physical downlink control channel to antenna ports includes at least one of the following:

[0231] Map the resource unit group number within a physical resource block corresponding to a physical downlink control channel to the antenna port number of the physical downlink control channel;

[0232] Map the resource unit group number corresponding to a physical downlink control channel to the antenna port number of the physical downlink control channel;

[0233] Map the resource unit bundle number corresponding to a physical downlink control channel to the antenna port number of the physical downlink control channel.

[0234] In one embodiment, the antenna port mapping of resource element group numbers in a physical downlink control channel search space includes at least one of the following:

[0235] Map a resource unit group number in a physical downlink control channel search space to the antenna port of the physical downlink control channel;

[0236] Map all resource unit group numbers corresponding to a physical downlink control channel search space to the antenna port of the physical downlink control channel;

[0237] Map all resource element bundle numbers in a physical downlink control channel search space to the antenna ports of that physical downlink control channel.

[0238] In one embodiment, the method of antenna port mapping based on control channel elements or bundles of control channel elements in the physical downlink control channel search space includes at least one of the following:

[0239] Map the control channel element number corresponding to a physical downlink control channel to the antenna port number of the physical downlink control channel;

[0240] Map the control channel element number corresponding to a physical downlink control channel search space to the antenna port number of the physical downlink control channel;

[0241] Map the control channel element bundle number corresponding to a physical downlink control channel to the antenna port number of the physical downlink control channel;

[0242] Map the control channel element bundle number corresponding to a physical downlink control channel search space to the antenna port number of the physical downlink control channel.

[0243] In one embodiment, the method of mapping antenna ports in units of virtual resource blocks or bundles of virtual resource blocks in the physical downlink control channel search space includes at least one of the following:

[0244] Map the virtual resource block number corresponding to a physical downlink control channel to the antenna port number of the physical downlink control channel;

[0245] Map the virtual resource block number corresponding to the physical downlink control channel search space to the antenna port number of the physical downlink control channel;

[0246] Map the virtual resource block bundle number corresponding to a physical downlink control channel to the antenna port number of the physical downlink control channel;

[0247] Map the virtual resource block bundle number corresponding to a physical downlink control channel search space to the antenna port number of the physical downlink control channel.

[0248] In one embodiment, the method of antenna port mapping based on candidate locations corresponding to an aggregation level of a physical downlink control channel includes at least one of the following:

[0249] Map the candidate location number corresponding to an aggregation level of a physical downlink control channel to the antenna port number of the physical downlink control channel;

[0250] Map all candidate location numbers corresponding to an aggregation level in a physical downlink control channel search space to the antenna port numbers of the physical downlink control channel.

[0251] In one embodiment, if the physical downlink control channel adopts a single-port transmission scenario, the physical downlink control channel determines the antenna port using at least one of the third to sixth mapping methods.

[0252] In one embodiment, the determination of the physical downlink control channel includes one or more of the following:

[0253] Determined based on the antenna port corresponding to the candidate location index of the physical downlink control channel;

[0254] The antenna port is determined based on the smallest control channel element index in the control channel element index of the physical downlink control channel.

[0255] Determined based on the antenna port corresponding to the largest control channel element index in the control channel element index of the physical downlink control channel;

[0256] The antenna port is determined based on the smallest control channel unit bundle index in the control channel unit bundle index of the physical downlink control channel.

[0257] The antenna port is determined based on the largest control channel unit bundle index in the control channel unit bundle index of the physical downlink control channel.

[0258] Determined based on the antenna port corresponding to the smallest virtual resource block index in the virtual resource block index corresponding to the physical downlink control channel;

[0259] Determined based on the antenna port corresponding to the largest virtual resource block index in the virtual resource block index corresponding to the physical downlink control channel;

[0260] Determined based on the antenna port corresponding to the smallest virtual resource block bundle index in the virtual resource block bundle index of the physical downlink control channel;

[0261] The antenna port is determined based on the largest virtual resource block bundle index in the virtual resource block bundle index corresponding to the physical downlink control channel.

[0262] In one embodiment, if the physical downlink control channel adopts a multi-port transmission scenario, the physical downlink control channel determines the antenna port using at least one of the first mapping method to the third mapping method.

[0263] In one embodiment, the correspondence of a resource unit group includes at least one of the following:

[0264] At least two consecutive orthogonal frequency division multiplexing symbols within a physical resource block correspond to a resource unit group;

[0265] Within a physical resource block, a first preset number of resource elements of an orthogonal frequency division multiplexing symbol correspond to a resource unit group.

[0266] In one embodiment, the correspondence of a control channel element includes at least one of the following:

[0267] At least two consecutive orthogonal frequency division multiplexing symbols within a physical resource block correspond to one control channel element;

[0268] A second preset number of virtual resource blocks within a physical resource block correspond to at least one control channel element.

[0269] In one embodiment, the mapping between physical downlink control channel resources and antenna ports using time-division multiplexing includes at least one of the following:

[0270] Mapping begins with the orthogonal frequency division multiplexing (OFDM) symbol at the start of the physical downlink control channel in the time domain, following the OFDM symbol index sequentially.

[0271] Mapping begins from the nth orthogonal frequency division multiplexing symbol in the initial time domain of the physical downlink control channel, and proceeds sequentially according to the orthogonal frequency division multiplexing symbol index, where n is a preset value or configured by signaling.

[0272] The orthogonal frequency division multiplexing symbol numbers carrying the physical downlink control channel in a physical downlink control channel search space are mapped to the antenna ports.

[0273] Define multiple ports for mapping within the resource unit bundle.

[0274] In one embodiment, the mapping relationship between the reference signals of the plurality of antenna ports includes at least one of the following:

[0275] Time-division multiplexing of reference signals from multiple antenna ports; code-division multiplexing of reference signals from multiple antenna ports.

[0276] In one embodiment, the time-division multiplexing of the reference signals at the plurality of antenna ports includes at least one of the following:

[0277] Time-division multiplexing of reference signals for multiple antenna ports is performed using orthogonal frequency division multiplexing symbols in the time domain as granular ports;

[0278] Time-division multiplexing of reference signals for multiple antenna ports is performed using multiple antenna ports defined within the resource unit bundle.

[0279] In one embodiment, the code division multiplexing of the reference signals at the plurality of antenna ports includes:

[0280] Code division multiplexing of reference signals for multiple antenna ports is performed using time-domain spreading codes as the granularity port.

[0281] In one embodiment, the code division multiplexing of reference signals for multiple antenna ports using time-domain spreading codes as the granularity port includes:

[0282] When a resource unit group consists of a third preset number of orthogonal frequency division multiplexing symbols, a spreading code of a third preset number of length in the time domain is used for code division multiplexing of the reference signals of the third preset number of antenna ports; or,

[0283] When a resource unit bundle consists of a third preset number of orthogonal frequency division multiplexing symbols, a spreading code of a third preset number of length in the time domain is used to perform code division multiplexing of the reference signals of the third preset number of antenna ports.

[0284] In one embodiment, the time-division multiplexing of the reference signals at the plurality of antenna ports satisfies at least one of the following conditions:

[0285] The reference signals of the multiple antenna ports are time-division multiplexed;

[0286] The frequency domain resource units of the reference signals transmitted on each time domain symbol of the physical downlink control channel search space are the same;

[0287] A CCE or CCE bundle includes reference signal resources for multiple antenna ports;

[0288] The reference signal of the antenna port is transmitted on each time domain symbol of the physical downlink control channel search space;

[0289] Resources are reserved on the time-domain symbols of the physical downlink control channel search space for the transmission of reference signals at the antenna ports.

[0290] In one embodiment, if the plurality of antenna ports are two-antenna ports, then the orthogonal frequency division multiplexing symbol where the reference signal of the two-antenna port is located is predefined or determined based on the cell identifier.

[0291] In one embodiment, the location of a portion of the plurality of antenna ports and the orthogonal frequency division multiplexing symbol containing the reference signal of the portion of the antenna ports is configured by a system message block or radio resource control.

[0292] In one embodiment, the apparatus further includes a multiplexing module configured to multiplex reference signals of the physical downlink control channel and the physical downlink shared channel located in the same physical resource block or physical resource block bundle when the antenna port corresponding to the physical downlink control channel is the same as or has a quasi-co-location relationship with the antenna port corresponding to the physical downlink shared channel.

[0293] In one embodiment, if the reference signals of the physical downlink control channel and the physical downlink shared channel are multiplexed within the same physical resource block or physical resource block bundle, then a portion of the resources of the physical downlink shared channel that do not transmit reference signals are used to transmit data of the physical downlink shared channel.

[0294] In one embodiment, the relationship between the position of the orthogonal frequency division multiplexing (OFDM) symbols in the time domain that do not transmit reference signals and the OFDM symbols in the time domain of the physical downlink shared channel includes at least one of the following:

[0295] The positions of the orthogonal frequency division multiplexing symbols in the time domain that do not transmit reference signals overlap with the orthogonal frequency division multiplexing symbols in the time domain of the physical downlink shared channel;

[0296] The position of the orthogonal frequency division multiplexing symbol in the time domain that does not transmit reference signals is less than the interval between the time domain symbol of the physical downlink control channel and the first threshold.

[0297] The position of the orthogonal frequency division multiplexing symbol in the time domain that does not transmit the reference signal is less than the second threshold interval between the time domain symbol of the reference signal of the physical downlink control channel;

[0298] Wherein, the second threshold is greater than the first threshold.

[0299] The downlink control information transmission device provided in this embodiment is configured to implement the downlink control information transmission method applied to the communication node in the embodiment shown in Figure 1. The implementation principle and technical effect of the downlink control information transmission device provided in this embodiment are similar, and will not be described again here.

[0300] In one embodiment, FIG12 is a schematic diagram of the structure of a communication device provided in an embodiment of this application. As shown in FIG11, the communication device provided in this application includes a processor 510 and a memory 520. The number of processors 510 in the device can be one or more; FIG12 shows one processor 510 as an example. The number of memories 520 in the communication device can be one or more; FIG12 shows one memory 520 as an example. The processor 510 and memory 520 of the communication device can be connected via a bus or other means; FIG12 shows a connection via a bus as an example. In this embodiment, the communication device can be a communication node.

[0301] The memory 520, as a computer-readable storage medium, can be configured to store software programs, computer-executable programs, and modules, such as program instructions / modules corresponding to the communication devices in any embodiment of this application (e.g., the determining module 110 and the transmission module 120 in the downlink control information transmission device). The memory 520 may include a program storage area and a data storage area, wherein the program storage area may store the operating system and at least one application program required for a function; the data storage area may store data created according to the use of the device, etc. Furthermore, the memory 520 may include high-speed random access memory and may also include non-volatile memory, such as at least one disk storage device, flash memory device, or other non-volatile solid-state storage device. In some instances, the memory 520 may further include memory remotely located relative to the processor 510, and these remote memories can be connected to the device via a network. Examples of such networks include, but are not limited to, the Internet, corporate intranets, local area networks, mobile communication networks, and combinations thereof.

[0302] The communication device provided above can be configured to execute the downlink control information transmission method for communication nodes provided in any of the above embodiments, and has the corresponding functions and effects.

[0303] This application also provides a storage medium containing computer-executable instructions, which, when executed by a computer processor, are used to perform a downlink control information transmission method applied to a communication node, the method comprising:

[0304] The antenna port is determined according to the antenna port mapping method, and the antenna port is a multi-antenna port;

[0305] Data transmission is performed at the antenna port.

[0306] Those skilled in the art will understand that the term user equipment covers any suitable type of wireless user equipment, such as mobile phones, portable data processing devices, portable web browsers, or vehicle-mounted mobile stations.

[0307] Generally, the various embodiments of this application can be implemented in hardware or dedicated circuitry, software, logic, or any combination thereof. For example, some aspects can be implemented in hardware, while others can be implemented in firmware or software that can be executed by a controller, microprocessor, or other computing device, although this application is not limited thereto.

[0308] Embodiments of this application can be implemented by executing computer program instructions through the data processor of a mobile device, for example, in a processor entity, or through hardware, or through a combination of software and hardware. The computer program instructions can be assembly instructions, Instruction Set Architecture (ISA) instructions, machine instructions, machine-dependent instructions, microcode, firmware instructions, status setting data, or source code or object code written in any combination of one or more programming languages.

[0309] Any block diagram of logical flow in the accompanying drawings of this application may represent program steps, or may represent interconnected logic circuits, modules, and functions, or may represent a combination of program steps and logic circuits, modules, and functions. The computer program may be stored on memory. The memory may be of any type suitable to the local technical environment and may be implemented using any suitable data storage technology, such as, but not limited to, read-only memory (ROM), random access memory (RAM), optical storage devices and systems (Digital Video Disc (DVD) or Compact Disk (CD)), etc. Computer-readable media may include non-transitory storage media. The data processor may be of any type suitable to the local technical environment, such as, but not limited to, general-purpose computers, special-purpose computers, microprocessors, digital signal processors (DSPs), application-specific integrated circuits (ASICs), field-programmable gate arrays (FPGAs), and processors based on multi-core processor architectures.

[0310] The above are merely preferred embodiments of this application and are not intended to limit this application. Various modifications and variations can be made to this application by those skilled in the art. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of this application should be included within the protection scope of this application.

Claims

1. A downlink control information transmission method, applied to a communication node, the method comprising: The antenna ports are determined according to the antenna port mapping method, and the antenna ports include multiple antenna ports; Downlink control information is transmitted at the antenna port.

2. The method according to claim 1, wherein, The antenna port mapping method includes: Antenna port mapping is performed on a resource-by-resource basis within the physical downlink control channel search space; or, The mapping between physical downlink control channel resources and antenna ports is performed using time-division multiplexing.

3. The method of claim 2, wherein, The antenna port mapping based on resources of the physical downlink control channel search space includes at least one of the following: The first mapping method is to map antenna ports in units of resource elements in the physical downlink control channel search space; A second mapping method that maps antenna ports based on resource unit groups or bundles of resource unit groups in the physical downlink control channel search space; A third mapping method that maps antenna ports using orthogonal frequency division multiplexing symbols in the time domain of the physical downlink control channel search space as units; A fourth mapping method that maps antenna ports in units of control channel elements or bundles of control channel elements in the physical downlink control channel search space; The fifth mapping method is to map antenna ports in units of virtual resource blocks or bundles of virtual resource blocks in the physical downlink control channel search space; The sixth mapping method is to map antenna ports based on candidate positions corresponding to an aggregation level of a physical downlink control channel.

4. The method of claim 3, wherein, The first mapping method, which maps antenna ports in units of resource elements of the physical downlink control channel search space, includes at least one of the following: Map the antenna port of the resource element number corresponding to a physical downlink control channel; Map the antenna port of the resource element number corresponding to a resource unit group; Map the antenna port of the resource element number corresponding to a control channel element; Map the antenna port of the resource element number corresponding to a physical resource block.

5. The method of claim 4, wherein, The process of mapping the resource element number corresponding to a physical downlink control channel to antenna ports includes at least one of the following: Map the resource element number corresponding to a physical downlink control channel within a physical resource block to the antenna port number of the physical downlink control channel within the same physical resource block. Map the numbers of all resource elements corresponding to a physical downlink control channel to the antenna port numbers of that physical downlink control channel.

6. The method of claim 4, wherein, The process of mapping the resource element number corresponding to a resource unit group to the antenna port includes at least one of the following: Map the resource element number within a resource unit group to the antenna port number of the physical downlink control channel within the resource unit group; Map the resource element numbers within a resource unit bundle to the antenna port numbers of the physical downlink control channels within the same resource unit bundle.

7. The method of claim 4, wherein, The process of mapping the resource element number corresponding to a control channel element to the antenna port includes at least one of the following: Map the resource element number within a control channel element to the antenna port number of the physical downlink control channel within the same control channel element. Map the resource element number within a control channel unit bundle to the antenna port number of the physical downlink control channel within the physical resource block where the control channel unit within the control channel unit bundle is located.

8. The method of claim 4, wherein, The step of mapping the resource element number corresponding to a physical resource block to the antenna port includes: Map the resource element number corresponding to the physical downlink control channel search space within a physical resource block to the antenna port number of the physical downlink control channel within the same physical resource block.

9. The method of claim 3, wherein, The second mapping method, which maps antenna ports in units of resource element groups or resource element bundles in the physical downlink control channel search space, includes at least one of the following: Map the antenna port of the resource unit group number corresponding to a physical downlink control channel; The resource unit group numbers in a physical downlink control channel search space are mapped to antenna ports.

10. The method of claim 9, wherein, The process of mapping the resource unit group number corresponding to a physical downlink control channel to antenna ports includes at least one of the following: Map the resource unit group number within a physical resource block corresponding to a physical downlink control channel to the antenna port number of the physical downlink control channel; Map the resource unit group number corresponding to a physical downlink control channel to the antenna port number of the physical downlink control channel; Map the resource unit bundle number corresponding to a physical downlink control channel to the antenna port number of the physical downlink control channel.

11. The method of claim 9, wherein, The process of mapping the resource unit group numbers in a physical downlink control channel search space to antenna ports includes at least one of the following: Map the resource unit group number in a physical resource block of a physical downlink control channel search space to the antenna port number of the physical downlink control channel; Map all resource unit group numbers corresponding to a physical downlink control channel search space to the antenna port numbers of the physical downlink control channel; Map all resource element bundle numbers in a physical downlink control channel search space to the antenna port numbers of the physical downlink control channel.

12. The method of claim 3, wherein, The fourth mapping method, which maps antenna ports in units of control channel elements or bundles of control channel elements in the physical downlink control channel search space, includes at least one of the following: Map the control channel element number corresponding to a physical downlink control channel to the antenna port number of the physical downlink control channel; Map the control channel element number corresponding to a physical downlink control channel search space to the antenna port number of the physical downlink control channel; Map the control channel element bundle number corresponding to a physical downlink control channel to the antenna port number of the physical downlink control channel; Map the control channel element bundle number corresponding to a physical downlink control channel search space to the antenna port number of the physical downlink control channel.

13. The method of claim 3, wherein, The fifth mapping method, which maps antenna ports in units of virtual resource blocks or bundles of virtual resource blocks in the physical downlink control channel search space, includes at least one of the following: Map the virtual resource block number corresponding to a physical downlink control channel to the antenna port number of the physical downlink control channel; Map the virtual resource block number corresponding to a physical downlink control channel search space to the antenna port number of the physical downlink control channel; Map the virtual resource block bundle number corresponding to a physical downlink control channel to the antenna port number of the physical downlink control channel; Map the virtual resource block bundle number corresponding to a physical downlink control channel search space to the antenna port number of the physical downlink control channel.

14. The method of claim 3, wherein, The sixth mapping method, which maps antenna ports on a unit basis according to the candidate positions corresponding to an aggregation level of a physical downlink control channel, includes at least one of the following: Map the candidate location number corresponding to an aggregation level of a physical downlink control channel to the antenna port number of the physical downlink control channel; Map all candidate location numbers corresponding to an aggregation level in a physical downlink control channel search space to the antenna port numbers of the physical downlink control channel.

15. The method of claim 3, wherein, If the physical downlink control channel adopts a single-port transmission scenario, then the physical downlink control channel uses at least one of the third to sixth mapping methods for antenna port mapping.

16. The method of claim 15, wherein, The method for determining the antenna port of the physical downlink control channel includes at least one of the following: Determined based on the antenna port corresponding to the candidate location index of the physical downlink control channel; The antenna port is determined based on the smallest control channel element index in the control channel element index of the physical downlink control channel. Determined based on the antenna port corresponding to the largest control channel element index in the control channel element index of the physical downlink control channel; The antenna port is determined based on the smallest control channel unit bundle index in the control channel unit bundle index of the physical downlink control channel. The antenna port is determined based on the largest control channel unit bundle index in the control channel unit bundle index of the physical downlink control channel. Determined based on the antenna port corresponding to the smallest virtual resource block index in the virtual resource block index corresponding to the physical downlink control channel; Determined based on the antenna port corresponding to the largest virtual resource block index in the virtual resource block index corresponding to the physical downlink control channel; Determined based on the antenna port corresponding to the smallest virtual resource block bundle index in the virtual resource block bundle index of the physical downlink control channel; The antenna port is determined based on the largest virtual resource block bundle index in the virtual resource block bundle index corresponding to the physical downlink control channel.

17. The method of claim 3, wherein, If the physical downlink control channel adopts a multi-port transmission scenario, then the physical downlink control channel uses at least one of the first mapping method to the third mapping method for antenna port mapping.

18. The method of claim 3, wherein, The correspondence of a resource unit group includes at least one of the following: At least two consecutive orthogonal frequency division multiplexing symbols within a physical resource block correspond to a resource unit group; Within a physical resource block, a first preset number of resource elements of an orthogonal frequency division multiplexing symbol correspond to a resource unit group.

19. The method of claim 3, wherein, The correspondence of a control channel element includes at least one of the following: At least two consecutive orthogonal frequency division multiplexing symbols within a physical resource block correspond to one control channel element; A second preset number of virtual resource blocks within a physical resource block correspond to at least one control channel element.

20. The method of claim 2, wherein, The mapping between physical downlink control channel resources and antenna ports using time-division multiplexing includes at least one of the following: Mapping begins with the orthogonal frequency division multiplexing (OFDM) symbol at the start of the physical downlink control channel in the time domain, following the OFDM symbol index sequentially. Mapping begins from the nth orthogonal frequency division multiplexing symbol in the initial time domain of the physical downlink control channel, and proceeds sequentially according to the orthogonal frequency division multiplexing symbol index, where n is a preset value or configured by signaling. The orthogonal frequency division multiplexing symbol numbers carrying the physical downlink control channel in a physical downlink control channel search space are mapped to the antenna ports. Define multiple ports for mapping within the resource unit bundle.

21. The method of claim 1, wherein, The mapping relationship between the reference signals of the plurality of antenna ports includes at least one of the following: Time-division multiplexing of the reference signals of the multiple antenna ports; code-division multiplexing of the reference signals of the multiple antenna ports.

22. The method of claim 21, wherein, The time-division multiplexing of the reference signals of the plurality of antenna ports includes at least one of the following: Time-division multiplexing of reference signals for multiple antenna ports is performed using orthogonal frequency division multiplexing symbols in the time domain as granular ports; Time-division multiplexing of reference signals for multiple antenna ports is performed using multiple antenna ports defined within the resource unit bundle.

23. The method of claim 21, wherein, The code division multiplexing of the reference signals at the multiple antenna ports includes: Code division multiplexing of reference signals for multiple antenna ports is performed using time-domain spreading codes as the granularity port.

24. The method of claim 23, wherein, The code division multiplexing of reference signals for multiple antenna ports using time-domain spreading codes as the granularity port includes: When a resource unit group consists of a third preset number of orthogonal frequency division multiplexing symbols, a spreading code of a third preset number of length in the time domain is used for code division multiplexing of the reference signals of the third preset number of antenna ports; or, When a resource unit bundle consists of a third preset number of orthogonal frequency division multiplexing symbols, a spreading code of a third preset number of length in the time domain is used to perform code division multiplexing of the reference signals of the third preset number of antenna ports.

25. The method of claim 23, wherein, The time-division multiplexing of the reference signals of the plurality of antenna ports satisfies at least one of the following conditions: The reference signals of the multiple antenna ports are time-division multiplexed; The frequency domain resource units of the reference signals transmitted on each time domain symbol of the physical downlink control channel search space are the same; A control channel element (CCE) or a control channel element bundle (CCE bundle) includes reference signal resources for multiple antenna ports; The reference signal of the antenna port is transmitted on each time domain symbol of the physical downlink control channel search space; Resources are reserved on the time-domain symbols of the physical downlink control channel search space for the transmission of reference signals at the antenna ports.

26. The method of claim 21, wherein, If the plurality of antenna ports are 2-antenna ports, then the orthogonal frequency division multiplexing symbol where the reference signal of the 2-antenna port is located is predefined or determined based on the cell identifier.

27. The method of claim 21, wherein, The positions of some of the multiple antenna ports and the orthogonal frequency division multiplexing symbols containing the reference signals of those antenna ports are configured by system message blocks or radio resource control.

28. The method of claim 2, further comprising: When the antenna port corresponding to the physical downlink control channel is the same as or has a quasi-co-location relationship with the antenna port corresponding to the physical downlink shared channel, the physical downlink control channel and the physical downlink shared channel are located in the same physical resource block or the reference signals within the physical resource block bundle are multiplexed.

29. The method of claim 28, wherein, If the physical downlink control channel and the physical downlink shared channel are located in the same physical resource block or the reference signals within the physical resource block bundle are multiplexed, then the portion of the physical downlink shared channel's resources that do not transmit reference signals are used to transmit data for the physical downlink shared channel.

30. The method of claim 29, wherein, The relationship between the position of the orthogonal frequency division multiplexing (OFDM) symbols in the time domain of the portion of the resources that do not transmit reference signals and the OFDM symbols in the time domain of the physical downlink shared channel includes at least one of the following: The positions of the orthogonal frequency division multiplexing symbols in the time domain of the portion of the resources that do not transmit reference signals overlap with the orthogonal frequency division multiplexing symbols in the time domain of the physical downlink shared channel; The position of the orthogonal frequency division multiplexing symbol in the time domain of the portion of the resource that does not transmit reference signals is less than the interval between the time domain symbol of the physical downlink control channel and the symbol of the physical downlink control channel. The position of the orthogonal frequency division multiplexing symbol in the time domain of the portion of the resource that does not transmit reference signals is less than the second threshold interval between the time domain symbols of the reference signals of the physical downlink control channel; Wherein, the second threshold is greater than the first threshold.

31. A communication device, comprising: Memory, and at least one processor; The memory is configured to store at least one program; When the at least one program is executed by the at least one processor, the at least one processor performs the method as described in any one of claims 1-30.

32. A storage medium storing a computer program that, when executed by a processor, implements the method as described in any one of claims 1-30.

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