Communication Method, Apparatus and Device

Abstract

An embodiment of the present application provides a communication method, apparatus, and device. The method includes: a terminal device receives first information sent by a network device, where the first information is used to indicate an association relationship of physical downlink control channels (PDCCHs) sent by N transceiver points, and N is an integer greater than or equal to 2; the terminal device receives a PDCCH according to the first information. The success rate of the terminal device receiving a PDCCH is improved.

Description

Technical Field

[0001] The present invention relates to communication technologies, and in particular, to a communication method, apparatus, and device. Background Art

[0002] A network device may send a physical downlink control channel (PDCCH) to a terminal device. The PDCCH may carry control information to schedule the terminal device for data transmission.

[0003] In a multi-transmission receiving point (M-TRP) communication scenario, multiple transmission receiving points may send the same PDCCH to a terminal device, so that the terminal device jointly decodes the same multiple PDCCHs to improve the probability of successfully receiving the PDCCH. However, in the actual application process, after the terminal device receives multiple PDCCHs, the terminal device cannot determine which PDCCHs are the same, resulting in the terminal device being unable to jointly decode the same multiple PDCCHs, and the success rate of the terminal device receiving the PDCCH is relatively low. Summary of the Invention

[0004] Embodiments of the present application provide a communication method, apparatus, and device, which improve the success rate of a terminal device receiving a PDCCH.

[0005] In a first aspect, embodiments of the present application provide a communication method, including:

[0006] The terminal device receives first information sent by a network device, where the first information is used to indicate an association relationship of physical downlink control channels (PDCCHs) sent by N transmission receiving points, and N is an integer greater than or equal to 2;

[0007] The terminal device receives the PDCCH according to the first information.

[0008] In a possible implementation manner, the first information is used to indicate at least one of the following:

[0009] A first association relationship between search spaces corresponding to N transmission receiving points; or,

[0010] A second association relationship between PDCCH candidate sets corresponding to N transmission receiving points, where the PDCCH candidate set includes at least one PDCCH candidate; or,

[0011] A third association relationship between PDCCH candidates corresponding to N transmission receiving points.

[0012] In a possible implementation, the identification of the search spaces corresponding to the N transceiver points is included in the first association relationship.

[0013] In a possible implementation, N is 2, the N transceiver points include a first transceiver point and a second transceiver point, the search spaces corresponding to the N transceiver points include a first search space and a second search space, the first transceiver point corresponds to the first search space, and the second transceiver point corresponds to the second search space;

[0014] The first association relationship includes the identification of the first search space and the identification of the second search space.

[0015] In a possible implementation, the identification of the PDCCH candidate sets corresponding to the N transceiver points is included in the second association relationship.

[0016] In a possible implementation, N is 2, the N transceiver points include a first transceiver point and a second transceiver point, the PDCCH candidate sets corresponding to the N transceiver points include a first PDCCH candidate set and a second PDCCH candidate set, the first transceiver point corresponds to the first PDCCH candidate set, and the second transceiver point corresponds to the second PDCCH candidate set;

[0017] The second association relationship includes the identification of the first PDCCH candidate set and the identification of the second PDCCH candidate set.

[0018] In a possible implementation, the association relationship between the PDCCH candidate sets corresponding to the N transceiver points is preset;

[0019] The second association relationship includes: the identification of the PDCCH candidates included in each PDCCH candidate set among the N PDCCH candidate sets.

[0020] In a possible implementation, the identification of the PDCCH candidates corresponding to the N transceiver points is included in the third association relationship.

[0021] In a possible implementation, N is 2, the N transceiver points include a first transceiver point and a second transceiver point, the PDCCH candidates corresponding to the N transceiver points include a first PDCCH candidate and a second PDCCH candidate, the first transceiver point corresponds to the first PDCCH candidate, and the second transceiver point corresponds to the second PDCCH candidate;

[0022] The third association relationship includes the identification of the first PDCCH candidate and the identification of the second PDCCH candidate.

[0023] In a possible implementation, the first information includes at least one of the following: the first association relationship, the second association relationship, or the third association relationship.

[0024] In a possible implementation, a terminal device receives first information sent by a network device, including:

[0025] The terminal device receives a first message sent by the network device, and the first message includes the first information;

[0026] Wherein, the first message includes at least one of the following messages: radio resource control (RRC) signaling, media access control element (MAC CE), downlink control information (DCI).

[0027] In a possible implementation, a terminal device receives first information sent by a network device, including:

[0028] The terminal device obtains a first association relationship set, and the first association relationship set includes at least one of the following: at least one of the first association relationships, at least one of the second association relationships, or at least one of the third association relationships;

[0029] The terminal device receives first indication information sent by the network device, and the first indication information is used to indicate activation or deactivation of at least one association relationship in the first association relationship set;

[0030] The terminal device determines the first information according to the first association relationship set and the first indication information.

[0031] In a possible implementation, the terminal device obtaining the first association relationship set includes:

[0032] The terminal device receives a first association relationship set sent by the network device.

[0033] In a possible implementation, the terminal device receiving the first association relationship set sent by the network device includes:

[0034] The terminal device receives RRC signaling sent by the network device, and the RRC signaling includes the first association relationship set.

[0035] In a possible implementation, the terminal device obtaining the first association relationship set includes:

[0036] The terminal device receives multiple association relationship sets sent by the network device;

[0037] The terminal device receives second indication information sent by the network device, where the second indication information indicates to activate the first association relation set among the multiple association relation sets.

[0038] In a possible implementation manner, the terminal device receiving the multiple association relation sets sent by the network device includes:

[0039] The terminal device receives an RRC signaling sent by the network device, where the RRC signaling includes the multiple association relation sets.

[0040] In a possible implementation manner, the terminal device receiving the second indication information sent by the network device includes:

[0041] The terminal device receives a second message sent by the network device, where the second message includes the second indication information, and the second message is a MAC CE or DCI.

[0042] In a possible implementation manner, the terminal device receiving the first indication information sent by the network device includes:

[0043] The terminal device receives a third message sent by the network device, where the third message includes the first indication information, and the third message is a MAC CE or DCI.

[0044] In a possible implementation manner, the terminal device receiving the first indication information sent by the network device includes:

[0045] The terminal device receives a MAC CE sent by the network device, where the MAC CE is used to indicate to activate an association relation subset in the first association relation set;

[0046] The terminal device receives a DCI sent by the network device, where the DCI is used to indicate to activate at least one of the association relations in the association relation subset.

[0047] In a second aspect, an embodiment of the present application provides a communication method, including:

[0048] The network device determines first information, where the first information is used to indicate the association relation of a physical downlink control channel PDCCH sent by N transceiver points, N is an integer greater than or equal to 2, and the first information is used for the terminal device to receive the PDCCH;

[0049] The network device sends the first information to the terminal device.

[0050] In a possible implementation manner, the first information is used to indicate at least one of the following:

[0051] The first association relationship between the search spaces corresponding to N transceiver points; or,

[0052] The second association relationship between the PDCCH candidate sets corresponding to N transceiver points, where the PDCCH candidate set includes at least one PDCCH candidate; or,

[0053] The third association relationship between the PDCCH candidates corresponding to N transceiver points.

[0054] In a possible implementation manner, the first association relationship includes the identifiers of the search spaces corresponding to the N transceiver points.

[0055] In a possible implementation manner, N is 2, the N transceiver points include a first transceiver point and a second transceiver point, the search spaces corresponding to the N transceiver points include a first search space and a second search space, the first transceiver point corresponds to the first search space, and the second transceiver point corresponds to the second search space;

[0056] The first association relationship includes the identifier of the first search space and the identifier of the second search space.

[0057] In a possible implementation manner, the second association relationship includes the identifiers of the PDCCH candidate sets corresponding to N transceiver points.

[0058] In a possible implementation manner, N is 2, the N transceiver points include a first transceiver point and a second transceiver point, the PDCCH candidate sets corresponding to the N transceiver points include a first PDCCH candidate set and a second PDCCH candidate set, the first transceiver point corresponds to the first PDCCH candidate set, and the second transceiver point corresponds to the second PDCCH candidate set;

[0059] The second association relationship includes the identifier of the first PDCCH candidate set and the identifier of the second PDCCH candidate set.

[0060] In a possible implementation manner, the association relationship between the PDCCH candidate sets corresponding to the N transceiver points is preset;

[0061] The second association relationship includes: the identifiers of the PDCCH candidates included in each PDCCH candidate set among the N PDCCH candidate sets.

[0062] In a possible implementation manner, the third association relationship includes the identifiers of the PDCCH candidates corresponding to N transceiver points.

[0063] In a possible implementation, N is 2, the N transceiver points include a first transceiver point and a second transceiver point, the PDCCH candidates corresponding to the N transceiver points include a first PDCCH candidate and a second PDCCH candidate, the first transceiver point corresponds to the first PDCCH candidate, and the second transceiver point corresponds to the second PDCCH candidate;

[0064] The third association relationship includes the identifier of the first PDCCH candidate and the identifier of the second PDCCH candidate.

[0065] In a possible implementation, the first information includes at least one of the following: the first association relationship, the second association relationship, or the third association relationship.

[0066] In a possible implementation, the network device sending the first information to the terminal device includes:

[0067] The network device sends a first message to the terminal device, and the first message includes the first information;

[0068] Wherein, the first message includes at least one of the following messages: radio resource control (RRC) signaling, media access control element (MAC CE), downlink control information (DCI).

[0069] In a possible implementation, the network device sending the first information to the terminal device includes:

[0070] The network device sends a first association relationship set to the terminal device;

[0071] The network device sends first indication information to the terminal device, and the first indication information is used to indicate activation or deactivation of at least one association relationship in the first association relationship set.

[0072] In a possible implementation, the network device sending the first association relationship set to the terminal device includes:

[0073] The network device sends RRC signaling to the terminal device, and the RRC signaling includes the first association relationship set.

[0074] In a possible implementation, the network device sending the first information to the terminal device includes:

[0075] The network device sends multiple association relationship sets to the terminal device;

[0076] The network device sends second indication information to the terminal device, where the second indication information indicates to activate a first association relationship set among the multiple association relationship sets;

[0077] The network device sends first indication information to the terminal device, where the first indication information is used to indicate to activate or deactivate at least one association relationship in the first association relationship set.

[0078] In a possible implementation manner, the network device sending multiple association relationship sets to the terminal device includes:

[0079] The network device sends RRC signaling to the terminal device, where the RRC signaling includes the multiple association relationship sets.

[0080] In a possible implementation manner, the network device sending second indication information to the terminal device includes:

[0081] The network device sends a second message to the terminal device, where the second message includes the second indication information, and the second message is a MAC CE or DCI.

[0082] In a possible implementation manner, the network device sending first indication information to the terminal device includes:

[0083] The network device sends a third message to the terminal device, where the third message includes the first indication information, and the third message is a MAC CE or DCI.

[0084] In a possible implementation manner, the network device sending first indication information to the terminal device includes:

[0085] The network device sends a MAC CE to the terminal device, where the MAC CE is used to indicate to activate an association relationship subset in the first association relationship set;

[0086] The network device sends DCI to the terminal device, where the DCI is used to indicate to activate the at least one association relationship in the association relationship subset.

[0087] In a third aspect, an embodiment of the present application provides a communication device, including a receiving module, where,

[0088] The receiving module is configured to receive first information sent by a network device, where the first information is used to indicate an association relationship of a physical downlink control channel PDCCH sent by N transceiver points, and N is an integer greater than or equal to 2;

[0089] The receiving module is further configured to receive the PDCCH according to the first information.

[0090] In a possible implementation, the first information is used to indicate at least one of the following:

[0091] A first association relationship between search spaces corresponding to N transceiver points; or,

[0092] A second association relationship between PDCCH candidate sets corresponding to N transceiver points, where the PDCCH candidate set includes at least one PDCCH candidate; or,

[0093] A third association relationship between PDCCH candidates corresponding to N transceiver points.

[0094] In a possible implementation, the first association relationship includes identifiers of search spaces corresponding to the N transceiver points.

[0095] In a possible implementation, N is 2, the N transceiver points include a first transceiver point and a second transceiver point, the search spaces corresponding to the N transceiver points include a first search space and a second search space, the first transceiver point corresponds to the first search space, and the second transceiver point corresponds to the second search space;

[0096] The first association relationship includes the identifier of the first search space and the identifier of the second search space.

[0097] In a possible implementation, the second association relationship includes identifiers of PDCCH candidate sets corresponding to N transceiver points.

[0098] In a possible implementation, N is 2, the N transceiver points include a first transceiver point and a second transceiver point, the PDCCH candidate sets corresponding to the N transceiver points include a first PDCCH candidate set and a second PDCCH candidate set, the first transceiver point corresponds to the first PDCCH candidate set, and the second transceiver point corresponds to the second PDCCH candidate set;

[0099] The second association relationship includes the identifier of the first PDCCH candidate set and the identifier of the second PDCCH candidate set.

[0100] In a possible implementation, the association relationship between PDCCH candidate sets corresponding to the N transceiver points is preset;

[0101] The second association relationship includes: identifiers of PDCCH candidates included in each PDCCH candidate set among the N PDCCH candidate sets.

[0102] In a possible implementation, the third association relationship includes identifiers of PDCCH candidates corresponding to N transceiver points.

[0103] In a possible implementation, N is 2, the N transceiver points include a first transceiver point and a second transceiver point, the PDCCH candidates corresponding to the N transceiver points include a first PDCCH candidate and a second PDCCH candidate, the first transceiver point corresponds to the first PDCCH candidate, and the second transceiver point corresponds to the second PDCCH candidate;

[0104] The third association relationship includes the identifier of the first PDCCH candidate and the identifier of the second PDCCH candidate.

[0105] In a possible implementation, the first information includes at least one of the following: the first association relationship, the second association relationship, or the third association relationship.

[0106] In a possible implementation, the receiving module is specifically configured to:

[0107] Receive a first message sent by the network device, where the first message includes the first information;

[0108] Wherein, the first message includes at least one of the following messages: radio resource control (RRC) signaling, media access control element (MAC CE), downlink control information (DCI).

[0109] In a possible implementation, the apparatus further includes a processing module, wherein,

[0110] The processing module is configured to obtain a first association relationship set, where the first association relationship set includes at least one of the following: at least one of the first association relationships, at least one of the second association relationships, or at least one of the third association relationships;

[0111] The receiving module is further configured to receive a first indication information sent by the network device, where the first indication information is used to indicate activation or deactivation of at least one association relationship in the first association relationship set;

[0112] The processing module is further configured to determine the first information according to the first association relationship set and the first indication information.

[0113] In a possible implementation, the receiving module is further configured to:

[0114] Receive a first association relationship set sent by the network device.

[0115] In a possible implementation, the receiving module is specifically configured to:

[0116] Receive the RRC signaling sent by the network device, where the RRC signaling includes the first association relationship set.

[0117] In a possible implementation manner, the receiving module is further configured to:

[0118] Receive multiple association relationship sets sent by the network device;

[0119] Receive second indication information sent by the network device, where the second indication information indicates to activate the first association relationship set among the multiple association relationship sets.

[0120] In a possible implementation manner, the receiving module is specifically configured to:

[0121] Receive the RRC signaling sent by the network device, where the RRC signaling includes the multiple association relationship sets.

[0122] In a possible implementation manner, the receiving module is specifically configured to:

[0123] Receive a second message sent by the network device, where the second message includes the second indication information, and the second message is a MAC CE or DCI.

[0124] In a possible implementation manner, the receiving module is specifically configured to:

[0125] Receive a third message sent by the network device, where the third message includes the first indication information, and the third message is a MAC CE or DCI.

[0126] In a possible implementation manner, the receiving module is specifically configured to:

[0127] Receive the MAC CE sent by the network device, where the MAC CE is used to indicate to activate an association relationship subset in the first association relationship set;

[0128] Receive the DCI sent by the network device, where the DCI is used to indicate to activate at least one association relationship in the association relationship subset.

[0129] Fourthly, an embodiment of the present application provides a communication device, including: a processing module and a sending module, where,

[0130] The processing module is configured to determine first information, where the first information is used to indicate the association relationship of the physical downlink control channel PDCCH sent by N transceiver points, N is an integer greater than or equal to 2, and the first information is used for the terminal device to receive the PDCCH;

[0131] The sending module is configured to send the first information to the terminal device.

[0132] In a possible implementation, the first information is used to indicate at least one of the following:

[0133] A first association relationship between search spaces corresponding to N transceiver points; or,

[0134] A second association relationship between PDCCH candidate sets corresponding to N transceiver points, where the PDCCH candidate set includes at least one PDCCH candidate; or,

[0135] A third association relationship between PDCCH candidates corresponding to N transceiver points.

[0136] In a possible implementation, the first association relationship includes identifiers of search spaces corresponding to the N transceiver points.

[0137] In a possible implementation, N is 2, the N transceiver points include a first transceiver point and a second transceiver point, the search spaces corresponding to the N transceiver points include a first search space and a second search space, the first transceiver point corresponds to the first search space, and the second transceiver point corresponds to the second search space;

[0138] The first association relationship includes an identifier of the first search space and an identifier of the second search space.

[0139] In a possible implementation, the second association relationship includes identifiers of PDCCH candidate sets corresponding to N transceiver points.

[0140] In a possible implementation, N is 2, the N transceiver points include a first transceiver point and a second transceiver point, the PDCCH candidate sets corresponding to the N transceiver points include a first PDCCH candidate set and a second PDCCH candidate set, the first transceiver point corresponds to the first PDCCH candidate set, and the second transceiver point corresponds to the second PDCCH candidate set;

[0141] The second association relationship includes an identifier of the first PDCCH candidate set and an identifier of the second PDCCH candidate set.

[0142] In a possible implementation, the association relationship between PDCCH candidate sets corresponding to the N transceiver points is preset;

[0143] The second association relationship includes: identifiers of PDCCH candidates included in each PDCCH candidate set among the N PDCCH candidate sets.

[0144] In a possible implementation, the third association relationship includes the identifiers of the PDCCH candidates corresponding to N transceiver points.

[0145] In a possible implementation, N is 2, the N transceiver points include a first transceiver point and a second transceiver point, the PDCCH candidates corresponding to the N transceiver points include a first PDCCH candidate and a second PDCCH candidate, the first transceiver point corresponds to the first PDCCH candidate, and the second transceiver point corresponds to the second PDCCH candidate;

[0146] The third association relationship includes the identifier of the first PDCCH candidate and the identifier of the second PDCCH candidate.

[0147] In a possible implementation, the first information includes at least one of the following: the first association relationship, the second association relationship, or the third association relationship.

[0148] In a possible implementation, the sending module is specifically configured to:

[0149] Send a first message to the terminal device, where the first message includes the first information;

[0150] Wherein, the first message includes at least one of the following messages: radio resource control (RRC) signaling, media access control unit (MAC) CE, downlink control information (DCI).

[0151] In a possible implementation, the sending module is specifically configured to:

[0152] Send a first association relationship set to the terminal device;

[0153] Send first indication information to the terminal device, where the first indication information is used to indicate activation or deactivation of at least one association relationship in the first association relationship set.

[0154] In a possible implementation, the sending module is specifically configured to:

[0155] Send RRC signaling to the terminal device, where the RRC signaling includes the first association relationship set.

[0156] In a possible implementation, the sending module is specifically configured to:

[0157] Send multiple association relationship sets to the terminal device;

[0158] Send second indication information to the terminal device, where the second indication information indicates activation of the first association relationship set in the multiple association relationship sets;

[0159] Send first indication information to the terminal device, where the first indication information is used to indicate activation or deactivation of at least one association relationship in the first association relationship set.

[0160] In a possible implementation manner, the sending module is specifically configured to:

[0161] Send RRC signaling to the terminal device, where the RRC signaling includes the multiple association relationship sets.

[0162] In a possible implementation manner, the sending module is specifically configured to:

[0163] Send a second message to the terminal device, where the second message includes the second indication information, and the second message is a MAC CE or DCI.

[0164] In a possible implementation manner, the sending module is specifically configured to:

[0165] Send a third message to the terminal device, where the third message includes the first indication information, and the third message is a MAC CE or DCI.

[0166] In a possible implementation manner, the sending module is specifically configured to:

[0167] Send a MAC CE to the terminal device, where the MAC CE is used to indicate activation of an association relationship subset in the first association relationship set;

[0168] Send DCI to the terminal device, where the DCI is used to indicate activation of the at least one association relationship in the association relationship subset.

[0169] In a fifth aspect, an embodiment of the present application provides a terminal device, including: a transceiver, a processor, and a memory;

[0170] The memory stores computer-executable instructions;

[0171] The processor executes the computer-executable instructions stored in the memory, so that the processor executes the communication method according to any one of the first aspect.

[0172] In a sixth aspect, an embodiment of the present application provides a network device, including: a transceiver, a processor, and a memory;

[0173] The memory stores computer-executable instructions;

[0174] The processor executes the computer-executable instructions stored in the memory, so that the processor executes the communication method according to any one of the second aspect.

[0175] In a seventh aspect, an embodiment of the present application provides a computer-readable storage medium storing computer-executable instructions, which are used to implement the communication method according to any one of the first aspect when executed by a processor.

[0176] In an eighth aspect, an embodiment of the present application provides a computer-readable storage medium storing computer-executable instructions, which are used to implement the communication method according to any one of the second aspect when executed by a processor. Description of the Drawings

[0177] Figure 1A is an architecture diagram of a communication system provided by an embodiment of the present application;

[0178] Figure 1B is an architecture diagram of another communication system provided by an embodiment of the present application;

[0179] Figure 2 is a schematic flowchart of a communication method provided by an embodiment of the present application;

[0180] Figure 3 is a schematic flowchart of another communication method provided by an embodiment of the present application;

[0181] Figure 4 is a schematic flowchart of yet another communication method provided by an embodiment of the present application;

[0182] Figure 5 is a schematic flowchart of still another communication method provided by an embodiment of the present application;

[0183] Figure 6 is a schematic structural diagram of a communication device provided by an embodiment of the present application;

[0184] Figure 7 is a schematic structural diagram of another communication device provided by an embodiment of the present application;

[0185] Figure 8 is a schematic structural diagram of a terminal device provided by an embodiment of the present application;

[0186] Figure 9 is a schematic structural diagram of a network device provided by an embodiment of the present application. Detailed Embodiments

[0187] For ease of understanding, the concepts related to the embodiments of the present application are first described.

[0188] Network device: A device with wireless transceiver functions. It includes, but is not limited to: Evolutional Node B (eNB or eNodeB) in Long Term Evolution (LTE), base station (gNodeB or gNB) or TRP in New Radio (NR), base stations in subsequent evolved systems, access nodes in Wireless Fidelity (WiFi) systems, wireless relay nodes, wireless backhaul nodes, etc. The base station can be: macro base station, micro base station, pico base station, small cell, relay station, or balloon station, etc. Multiple base stations can support the networks of the same technology mentioned above, or can support the networks of different technologies mentioned above. The base station can include one or more co-located or non-co-located TRPs.

[0189] Terminal device: A device with wireless transceiver functions. The terminal device can be deployed on land, including indoor or outdoor, handheld, wearable or vehicle-mounted; it can also be deployed on water (such as ships, etc.); it can also be deployed in the air (such as airplanes, balloons, satellites, etc.). The terminal device can be a mobile phone, a tablet computer (Pad), a computer with wireless transceiver functions, a virtual reality (VR) terminal device, an augmented reality (AR) terminal device, a wireless terminal in industrial control, a vehicle-mounted terminal device, a wireless terminal in self-driving, a wireless terminal device in remote medical, a wireless terminal device in smart grid, a wireless terminal device in transportation safety, a wireless terminal device in smart city, a wireless terminal device in smart home, a wearable terminal device, etc. The terminal device involved in the embodiments of the present application can also be referred to as a terminal, a user equipment (UE), an access terminal device, a vehicle-mounted terminal, an industrial control terminal, a UE unit, a UE station, a mobile station, a mobile terminal, a remote station, a remote terminal device, a mobile device, a UE terminal device, a wireless communication device, a UE agent or a UE device, etc. The terminal device can also be fixed or mobile.

[0190] Transmission and Reception Point (TRP): A network device can include one or more transmission and reception points. A transmission and reception point can be an independent network device, or can be a part of the network device with transmission and reception functions. For example, a transmission and reception point can be an antenna in the network device.

[0191] The correlation relationship between different PDCCH candidates: It refers to that there is a correlation relationship between the PDCCHs received on the different PDCCH candidates. The PDCCHs received on the different PDCCH candidates with a correlation relationship are the same, or the received PDCCHs carry the same control information, or the received PDCCHs schedule the same PDSCH. Optionally, if multiple PDCCHs are received on the PDCCH candidates with a correlation relationship, joint decoding can be performed based on the multiple PDCCHs. Optionally, different PDCCH candidates must have the same aggregation level.

[0192] There is a correlation relationship between different sets of PDCCH candidates: It means that the PDCCHs detected in different sets of PDCCH candidates have a correlation relationship. For example, assuming that there is a correlation relationship between the first set of PDCCH candidates and the second set of PDCCH candidates, then there is a correlation relationship between the PDCCHs detected in the first set of PDCCH candidates and the PDCCHs detected in the second set of PDCCH candidates. Among them, the PDCCHs received on the different sets of PDCCH candidates with a correlation relationship are the same, or the received PDCCHs carry the same control information, or the received PDCCHs schedule the same PDSCH. Optionally, the PDCCH candidates within the different sets of PDCCH candidates must have the same aggregation level.

[0193] There is a correlation relationship between different search spaces: It means that the PDCCHs detected in different search spaces have a correlation relationship. For example, assuming that there is a correlation relationship between the first search space and the second search space, then there is a correlation relationship between the PDCCHs detected in the first search space and the PDCCHs detected in the second search space. Among them, the PDCCHs received on the different search spaces with a correlation relationship are the same, or the received PDCCHs carry the same control information, or the received PDCCHs schedule the same PDSCH. Optionally, the detected PDCCHs must have the same aggregation level.

[0194] Next, in combination with Figure 1A - Figure 1B , the communication system applicable to the embodiments of the present application will be described.

[0195] Figure 1A It is an architecture diagram of a communication system provided by an embodiment of the present application. Please refer to Figure 1A, including a network device 101 and a terminal device 102. A transceiver point A and a transceiver point B are provided on the network device 101. The transceiver point A and the transceiver point B can send the same PDCCH to the terminal device 102, and the terminal device 102 can perform joint decoding on the same PDCCH to improve the probability that the terminal device 102 successfully receives (or decodes) the PDCCH.

[0196] Figure 1B It is a schematic diagram of the architecture of another communication system provided by an embodiment of the present application. Please refer to Figure 1B , including a transceiver point 101-A, a transceiver point 101-B, and a terminal device 102. The two transceiver points are two independent network devices. The multiple transceiver points can send the same PDCCH to the terminal device 102, and the terminal device 102 can perform joint decoding on the same PDCCH to improve the probability that the terminal device 102 successfully receives (or decodes) the PDCCH.

[0197] In the related art, after multiple transceiver points send the same PDCCH to the terminal device, since the terminal device cannot determine which PDCCHs are the same PDCCHs, the terminal device cannot perform joint decoding on the same PDCCH, resulting in a low probability that the terminal device successfully receives the PDCCH.

[0198] To solve the above technical problems, before receiving the PDCCH, the terminal device can first obtain the association relationship of the PDCCHs sent by multiple transceiver points, and perform the reception and joint decoding of the PDCCH according to the association relationship of the PDCCHs, thereby improving the probability that the terminal device successfully receives the PDCCH.

[0199] Next, through specific embodiments, the technical solutions shown in the present application will be described. It should be noted that the following several embodiments can exist independently or be combined with each other. For the same or similar content, it will not be repeated in different embodiments.

[0200] Figure 2 It is a schematic flow chart of a communication method provided by an embodiment of the present application. Please refer to Figure 2 , the method may include:

[0201] S201. The network device sends first information to the terminal device.

[0202] The first information is used to indicate the association relationship of the PDCCHs sent by N transceiver points, where N is an integer greater than or equal to 2. The N transceiver points may be included in the network device.

[0203] The association relationship refers to the association relationship between PDCCHs sent by different transceiver points, that is, the association relationship is used to indicate which PDCCHs sent by different transceiver points are the same. For example, if PDCCH1 corresponding to TPR1 has an association relationship with PDCCH2 corresponding to TRP2, then PDCCH1 sent by TRP1 is the same as PDCCH2 sent by TRP2, and the terminal device can perform joint reception and joint decoding on PDCCH1 and PDCCH2. Joint reception can indicate that the terminal device blindly detects PDCCH1 and PDCCH2 simultaneously, and joint decoding can refer to the terminal device performing soft combination on PDCCH1 and PDCCH2 for decoding.

[0204] PDCCHx represents the PDCCH candidate with index x.

[0205] The first information is used to indicate at least one of the following:

[0206] The first association relationship between the search spaces corresponding to N transceiver points. Optionally, the number of search spaces corresponding to N transceiver points can be N, and the N search spaces can correspond to N transceiver points respectively; or,

[0207] The second association relationship between the PDCCH candidate sets corresponding to N transceiver points, where the PDCCH candidate set includes at least one PDCCH candidate. Optionally, the number of PDCCH candidate sets corresponding to N transceiver points can be N, and the N PDCCH candidate sets can correspond to N transceiver points respectively; or,

[0208] The third association relationship between the PDCCH candidates corresponding to N transceiver points. Optionally, the number of PDCCH candidates corresponding to N transceiver points can be N, and the N PDCCHs can correspond to N transceiver points respectively.

[0209] Next, the first association relationship, the second association relationship, and the third association relationship will be described in detail respectively.

[0210] Regarding the first association relationship:

[0211] The first association relationship may include the identifiers of the search spaces corresponding to N transceiver points. There is an association relationship between the search spaces corresponding to the N transceiver points.

[0212] For example, assume that three transceiver points can send the same PDCCH to a terminal device. Transceiver point 1 corresponds to search space 1, transceiver point 2 corresponds to search space 2, and transceiver point 3 corresponds to search space 3. The first association relationship can be as follows: {search space 1, search space 2, search space 3}. From the first association relationship, it can be seen that there is an association relationship between search space 1, search space 2, and search space 3. Among them, the association relationship means that the PDCCHs received in each search space indicated by the association relationship are the same, or the received PDCCHs carry the same control information, or the received PDCCHs schedule the same PDSCH. Optionally, the multiple search spaces indicated by the first association relationship must have the same period and / or the same number of time slots and / or the PDCCHs with an association relationship must have the same aggregation level.

[0213] N can be 2. The N transceiver points include a first transceiver point and a second transceiver point. The N search spaces include a first search space and a second search space. The first transceiver point corresponds to the first search space, and the second transceiver point corresponds to the second search space; the first association relationship includes the identifier of the first search space and the identifier of the second search space. The first association relationship is used to indicate that there is an association relationship between the first search space and the second search space. Optionally, the multiple search spaces indicated by the first association relationship can have the same period and / or the same number of time slots.

[0214] For example, assume that two transceiver points can send PDCCHs with an association relationship to a terminal device. Transceiver point 1 corresponds to search space 1, and transceiver point 2 corresponds to search space 2. The first association relationship can be as follows: {search space 1, search space 2}. From the first association relationship, it can be seen that there is an association relationship between search space 1 and search space 2.

[0215] Regarding the second association relationship:

[0216] The second association relationship includes the identifiers of the PDCCH candidate sets corresponding to N transceiver points. There is an association relationship between the PDCCH candidate sets corresponding to the N transceiver points. One PDCCH candidate set contains at least one PDCCH candidate.

[0217] For example, assume that three transceiver points can send the same PDCCH to a terminal device. Transceiver point 1 corresponds to PDCCH candidate set 1, transceiver point 2 corresponds to PDCCH candidate set 2, and transceiver point 3 corresponds to PDCCH candidate set 3. The second association relationship can be as follows: {PDCCH candidate set 1, PDCCH candidate set 2, PDCCH candidate set 3}. From the second association relationship, it can be known that there is an association relationship between PDCCH candidate set 1, PDCCH candidate set 2, and PDCCH candidate set 3. Among them, the association relationship means that the PDCCH received within one PDCCH candidate set is the same as the PDCCH received within other PDCCH candidate sets, or the received PDCCH carries the same control information, or the received PDCCH schedules the same PDSCH. Optionally, the PDCCH candidates within the PDCCH candidate set indicated by the second association relationship must have the same aggregation level.

[0218] N can be 2. The N transceiver points include a first transceiver point and a second transceiver point. The N PDCCH candidate sets include a first PDCCH candidate set and a second PDCCH candidate set. The first transceiver point corresponds to the first PDCCH candidate set, and the second transceiver point corresponds to the second PDCCH candidate set. The second association relationship includes the identifier of the first PDCCH candidate set and the identifier of the second PDCCH candidate set. The second association relationship is used to indicate that there is an association relationship between the first PDCCH candidate set and the second PDCCH candidate set.

[0219] For example, assume that two transceiver points can send the same PDCCH to a terminal device. Transceiver point 1 corresponds to PDCCH candidate set 1, and transceiver point 2 corresponds to PDCCH candidate set 2. The first association relationship can be as follows: {PDCCH candidate set 1, PDCCH candidate set 2}. From the second association relationship, it can be known that there is an association relationship between PDCCH candidate set 1 and PDCCH candidate set 2.

[0220] Optionally, the association relationship between N PDCCH candidate sets can also be preset. For example, the network device can send the association relationship between N PDCCH candidate sets to the terminal device through high-layer signaling, or the association relationship between N PDCCH candidate sets can be predefined or agreed upon by the protocol. In this case, the network device can configure the PDCCH candidates included in each PDCCH candidate set, that is, the second association relationship includes: the identifiers of the PDCCH candidates included in each PDCCH candidate set.

[0221] For example, assume that an association relationship is predefined between a first PDCCH candidate set and a second PDCCH candidate set. The first PDCCH candidate set corresponds to a first transceiver point, and the second PDCCH candidate set corresponds to a second transceiver point. Then, the network device may send to the terminal device the identifier of the PDCCH included in the first PDCCH candidate set and the identifier of the PDCCH candidate included in the second PDCCH candidate set.

[0222] For the third association relationship:

[0223] The third association relationship includes the identifiers of the PDCCH candidates corresponding to N transceiver points. There is an association relationship between the PDCCH candidates corresponding to the N transceiver points.

[0224] For example, assume that three transceiver points can send the same PDCCH to the terminal device. Transceiver point 1 corresponds to PDCCH candidate 1, transceiver point 2 corresponds to PDCCH candidate 2, and transceiver point 3 corresponds to PDCCH candidate 3. The third association relationship may be as follows: {PDCCH candidate 1, PDCCH candidate 2, PDCCH candidate 3}. From the first association relationship, it can be known that there is an association relationship between PDCCH candidate 1, PDCCH candidate 2, and PDCCH candidate 3. Among them, the association relationship means that the PDCCH received on PDCCH candidate 1, PDCCH candidate 2, and PDCCH candidate 3 is the same, or the received PDCCH carries the same control information, or the received PDCCH schedules the same PDSCH. Optionally, the PDCCH candidates indicated by the third association relationship must have the same aggregation level.

[0225] N may be 2. The N transceiver points include a first transceiver point and a second transceiver point. The N PDCCHs include a first PDCCH candidate and a second PDCCH candidate. The first transceiver point corresponds to the first PDCCH candidate, and the second transceiver point corresponds to the second PDCCH candidate; the third association relationship includes the identifier of the first PDCCH candidate and the identifier of the second PDCCH candidate. The third association relationship is used to indicate that there is an association relationship between the first PDCCH candidate and the second PDCCH candidate.

[0226] For example, assume that two transceiver points can send the same PDCCH to the terminal device. Transceiver point 1 corresponds to PDCCH candidate 1, and transceiver point 2 corresponds to PDCCH candidate 2. The first association relationship may be as follows: {PDCCH candidate 1, PDCCH candidate 2}. From the first association relationship, it can be known that there is an association relationship between PDCCH candidate 1 and PDCCH candidate 2.

[0227] S202. The terminal device receives the PDCCH according to the first information.

[0228] The terminal device determines the PDCCHs with an association relationship according to the first information and receives the PDCCHs with an association relationship. The PDCCHs with an association relationship are PDCCHs sent by different transceiver points. After the terminal device receives the PDCCHs with an association relationship, the terminal device can perform joint decoding on the PDCCHs with an association relationship.

[0229] In the embodiments of the present application, before receiving the PDCCH, the terminal device can first obtain the association relationship of the PDCCHs sent by multiple transceiver points, and perform the reception and joint decoding of the PDCCH according to the association relationship of the PDCCHs, thereby increasing the probability of the terminal device successfully receiving the PDCCH.

[0230] Based on the above embodiments, the terminal device can obtain the first information in various ways. Next, the following Figure 3 - Figure 5 illustrated embodiments will be introduced separately.

[0231] Figure 3 is a schematic flowchart of another communication method provided by the embodiments of the present application. Please refer to Figure 3 This method may include:

[0232] S301. The network device sends the first information to the terminal device.

[0233] The first information includes at least one of the following: the first association relationship, the second association relationship, or the third association relationship.

[0234] The network device may send a first message to the terminal device, and the first message includes the first information. The first message includes at least one of the following messages: radio resource control (RRC) signaling, media access control-control element (MAC CE), downlink control information (DCI).

[0235] S302. The terminal device receives the PDCCH according to the first information.

[0236] When the content included in the first information is different, the manner in which the terminal device receives the PDCCH is different, and it may include the following seven cases:

[0237] The first case: The first information includes the first association relationship.

[0238] In this case, the terminal device can determine N search spaces with an association relationship according to the first association relationship, receive PDCCHs in the N search spaces, detect PDCCHs in the N search spaces, and perform joint decoding on the detected PDCCHs.

[0239] For example, assume that the first association relationship includes the identifier of search space 1 and the identifier of search space 2. Then the terminal device can detect simultaneously in search space 1 and search space 2. If the terminal device detects PDCCH1 in search space 1 and PDCCH2 in search space 2. The terminal device can consider that PDCCH1 and PDCCH2 have an association relationship and can perform joint decoding on PDCCH1 and PDCCH2.

[0240] The second case: The first information includes a second association relationship.

[0241] In this case, the terminal device can determine N PDCCH candidate sets with an association relationship according to the second association relationship, receive PDCCHs in the N PDCCH candidate sets, detect PDCCHs in the N PDCCH candidate sets, and perform joint decoding on the detected PDCCHs. The N PDCCH candidate sets can belong to the same search space or different search spaces.

[0242] For example, assume that the first association relationship includes the identifier of PDCCH candidate set 1 and the identifier of PDCCH candidate set 2. Then the terminal device can detect simultaneously in PDCCH candidate set 1 and PDCCH candidate set 2. If the terminal device detects PDCCH1 in PDCCH candidate set 1 and PDCCH2 in PDCCH candidate set 2. The terminal device can consider that PDCCH1 and PDCCH2 have an association relationship and can perform joint decoding on PDCCH1 and PDCCH2.

[0243] The third case: The first information includes a third association relationship.

[0244] In this case, the terminal device can determine N PDCCH candidates with an association relationship according to the third association relationship, receive N PDCCHs on the N PDCCH candidates. The terminal device can determine that the N PDCCHs have an association relationship and can perform joint decoding on the received N PDCCHs. The N PDCCHs can belong to the same search space or different search spaces.

[0245] For example, assume that the first association relationship includes the identifier of PDCCH1 and the identifier of PDCCH2. Then, the terminal device can receive PDCCH1 and PDCCH2 simultaneously, and perform joint decoding on the received PDCCH1 and PDCCH2.

[0246] The fourth case: The first information includes the first association relationship and the second association relationship.

[0247] In this case, the terminal device can first determine N search spaces with an association relationship according to the first association relationship, and then determine a PDCCH candidate set in each search space according to the second association relationship, obtaining N PDCCH candidate sets. The terminal device receives PDCCHs in the N PDCCH candidate sets and performs joint decoding on the received PDCCHs.

[0248] For example, assume that the first association relationship includes the identifier of search space 1 and the identifier of search space 2, and the second association relationship includes the identifier of PDCCH candidate set 1 and the identifier of PDCCH candidate set 2. Then, the terminal device determines PDCCH candidate set 1 in search space 1 and determines PDCCH candidate set 2 in search space 2. The terminal device can simultaneously detect in PDCCH candidate set 1 and PDCCH candidate set 2. If the terminal device detects PDCCH1 in PDCCH candidate set 1 and detects PDCCH2 in PDCCH candidate set 2, the terminal device can consider that PDCCH1 and PDCCH2 have an association relationship and can perform joint decoding on PDCCH1 and PDCCH2.

[0249] The fifth case: The first information includes the first association relationship and the third association relationship.

[0250] In this case, the terminal device can first determine N search spaces with an association relationship according to the first association relationship, and then determine a PDCCH candidate in each search space according to the third association relationship, obtaining N PDCCH candidates. The terminal device receives N PDCCHs among the N PDCCH candidates, and the terminal device can determine that the N PDCCHs have an association relationship and perform joint decoding on the N PDCCHs.

[0251] For example, assume that the first association relationship includes the identifier of search space 1 and the identifier of search space 2, and the third association relationship includes the identifier of PDCCH candidate 1 and the identifier of PDCCH candidate 2. Then, the terminal device determines PDCCH candidate 1 in search space 1 and determines PDCCH candidate 2 in search space 2. The terminal device can perform detection in both search space 1 and search space 2 simultaneously. If PDCCH1 is received on PDCCH candidate 1 in search space 1 and PDCCH2 is received on PDCCH candidate 2 in search space 2, the terminal device can consider that PDCCH1 and PDCCH2 have an association relationship and can perform joint decoding on PDCCH1 and PDCCH2.

[0252] The sixth case: The first information includes the second association relationship and the third association relationship.

[0253] In this case, the terminal device can first determine N sets of PDCCH candidates with an association relationship according to the first association relationship, and then determine one PDCCH candidate in each set of PDCCH candidates according to the third association relationship to obtain N PDCCH candidates. If the terminal device receives N PDCCHs on these N PDCCH candidates, the terminal device determines that these N PDCCHs have an association relationship and performs joint decoding on these N PDCCHs.

[0254] For example, assume that the second association relationship includes the identifier of set 1 of PDCCH candidates and the identifier of set 2 of PDCCH candidates, and the third association relationship includes the identifier of PDCCH candidate 1 and the identifier of PDCCH candidate 2. Then, the terminal device determines PDCCH candidate 1 in set 1 of PDCCH candidates and determines PDCCH candidate 2 in set 2 of PDCCH candidates. The terminal device can perform detection in both set 1 of PDCCH candidates and set 2 of PDCCH candidates simultaneously. If PDCCH1 is received on PDCCH candidate 1 in set 1 of PDCCH candidates and PDCCH2 is received on PDCCH candidate 2 in set 2 of PDCCH candidates. The terminal device can consider that PDCCH1 and PDCCH2 have an association relationship and can perform joint decoding on PDCCH1 and PDCCH2.

[0255] The seventh case: The first information includes the first association relationship, the second association relationship, and the third association relationship.

[0256] In this case, the terminal device can first determine N search spaces with an association relationship according to the first association relationship, then determine a PDCCH candidate set in each search space according to the second association relationship to obtain N PDCCH candidate sets, and then the terminal device determines a PDCCH candidate in each PDCCH candidate set according to the third association relationship to obtain N PDCCH candidates. If the terminal device receives N PDCCHs among the N PDCCH candidates, the terminal device can determine that the N PDCCHs have an association relationship, and then can perform joint decoding on the N PDCCHs.

[0257] For example, assume that the first association relationship includes the identifier of search space 1 and the identifier of search space 2, the second association relationship includes the identifier of PDCCH candidate set 1 and the identifier of PDCCH candidate set 2, and the third association relationship includes the identifier of PDCCH candidate 1 and the identifier of PDCCH candidate 2. The terminal device determines PDCCH candidate set 1 in search space 1 and determines PDCCH candidate set 2 in search space 2. The terminal device determines PDCCH candidate 1 in PDCCH candidate set 1 and determines PDCCH candidate 2 in PDCCH candidate set 2. The terminal device can simultaneously detect PDCCH on PDCCH candidate 1 and PDCCH candidate 2. If PDCCH1 is detected in PDCCH candidate 1 and PDCCH2 is detected in PDCCH candidate 2. The terminal device can consider that PDCCH1 and PDCCH2 have an association relationship and can perform joint decoding on PDCCH1 and PDCCH2.

[0258] In Figure 3 In the embodiment shown, the network device can send first information to the terminal device, and the first information includes at least one of the first association relationship, the second association relationship, or the third association relationship. The terminal device can perform reception and joint decoding of PDCCH according to at least one of the first association relationship, the second association relationship, or the third association relationship, thereby increasing the probability of the terminal device successfully receiving PDCCH.

[0259] Figure 4 It is a schematic flowchart of another communication method provided by the embodiments of this application. Please refer to Figure 4 and the method may include:

[0260] S401. The network device sends a first association relationship set to the terminal device.

[0261] The first association relationship set includes at least one of the following: at least one first association relationship, at least one second association relationship, or at least one third association relationship.

[0262] The network device may send RRC signaling to the terminal device, and the RRC signaling includes a first association relationship set.

[0263] S402. The network device sends first indication information to the terminal device.

[0264] The first indication information is used to indicate activation or deactivation of at least one association relationship in the first association relationship set.

[0265] At least one association relationship indicated by the first indication information to be activated or deactivated includes at least one of the following: a first association relationship, a second association relationship, or a third association relationship. The following situations may be included:

[0266] Situation 1. The first indication information indicates activation or deactivation of at least one first association relationship.

[0267] Situation 2. The first indication information indicates activation or deactivation of at least one second association relationship.

[0268] Situation 3. The first indication information indicates activation or deactivation of at least one third association relationship.

[0269] Situation 4. The first indication information indicates activation or deactivation of at least one first association relationship and at least one second association relationship.

[0270] Situation 5. The first indication information indicates activation or deactivation of at least one first association relationship and at least one third association relationship.

[0271] Situation 6. The first indication information indicates activation or deactivation of at least one second association relationship and at least one third association relationship.

[0272] Situation 7. The first indication information indicates activation or deactivation of at least one first association relationship, at least one second association relationship, and at least one third association relationship.

[0273] The network device may send a third message to the terminal device, and the third message includes the first indication information. The third message may be a MAC CE or DCI.

[0274] The first indication information may be represented by a bitmap or a bit sequence.

[0275] For example, assume that the first set of association relationships includes five first association relationships. When the first indication information is 10000, the first indication information indicates to activate or deactivate the first first association relationship. When the first indication information is 01000, the first indication information indicates to activate or deactivate the second first association relationship. When the first indication information is 00100, the first indication information indicates to activate or deactivate the third first association relationship. When the first indication information is 11000, the first indication information indicates to activate or deactivate the first first association relationship and the second first association relationship, and so on.

[0276] The second indication information can be represented by a bitmap or a bit sequence.

[0277] For example, assume that the first set of association relationships includes five second association relationships. When the first indication information is 10000, the first indication information indicates to activate or deactivate the first second association relationship. When the first indication information is 01000, the first indication information indicates to activate or deactivate the second second association relationship. When the first indication information is 00100, the first indication information indicates to activate or deactivate the third second association relationship. When the first indication information is 11000, the first indication information indicates to activate or deactivate the first second association relationship and the second second association relationship, and so on.

[0278] The third indication information can be represented by a bitmap or a bit sequence.

[0279] For example, assume that the first set of association relationships includes five third association relationships. When the first indication information is 10000, the first indication information indicates to activate or deactivate the first third association relationship. When the first indication information is 01000, the first indication information indicates to activate or deactivate the second third association relationship. When the first indication information is 00100, the first indication information indicates to activate or deactivate the third third association relationship. When the first indication information is 11000, the first indication information indicates to activate or deactivate the first third association relationship and the second third association relationship, and so on.

[0280] It should be noted that the first indication information can also indicate to deactivate some of the association relationships in the first set of association relationships, and then the activated or deactivated association relationships in the first set of association relationships can be determined.

[0281] S403. The terminal device determines the first information according to the first set of association relationships and the first indication information.

[0282] The terminal device can determine the activated association relationships in the first set of association relationships according to the first indication information, and determine that the first information includes the activated association relationships.

[0283] S404. The terminal device receives the PDCCH according to the first information.

[0284] It should be noted that for the execution process of S404, reference can be made to the execution process of S302, which will not be elaborated here.

[0285] In Figure 4 In the illustrated embodiment, the network device may first send a first set of association relationships to the terminal device and indicate, through first indication information, to activate at least one association relationship in the first set of association relationships. The terminal device may determine that the first information includes at least one of a first association relationship, a second association relationship, or a third association relationship according to the first set of association relationships and the first indication information. The terminal device may perform reception and joint decoding of the PDCCH according to at least one of the first association relationship, the second association relationship, or the third association relationship, thereby increasing the probability that the terminal device successfully receives the PDCCH.

[0286] Figure 5 It is a schematic flowchart of yet another communication method provided by an embodiment of the present application. Please refer to Figure 5 and the method may include:

[0287] S501. The network device sends multiple sets of association relationships to the terminal device.

[0288] Each set of association relationships includes at least one of the following: at least one first association relationship, at least one second association relationship, or at least one third association relationship.

[0289] The network device may send RRC signaling to the terminal device, and the RRC signaling includes multiple sets of association relationships.

[0290] S502. The network device sends second indication information to the terminal device, and the second indication information indicates to activate or deactivate at least one first set of association relationships among the multiple sets of association relationships.

[0291] The network device may send a second message to the terminal device, and the second message includes the second indication information. The second message is a MAC CE or DCI.

[0292] For example, assume that the number of multiple sets of association relationships configured by the RRC signaling is 3, which are respectively denoted as association relationship set 1, association relationship set 2, and association relationship set 3. When the second indication information is 100, it indicates to activate or deactivate association relationship set 1. When the second indication information is 010, it indicates to activate or deactivate association relationship set 2. When the second indication information is 001, it indicates to activate or deactivate association relationship set 3. When the second indication information is 011, it indicates to activate or deactivate association relationship set 2 and association relationship set 3.

[0293] As a variant, the second indication information indicates to activate or deactivate more than one first association relationship set among a plurality of association relationship sets. Wherein, the second indication information is MAC-CE. Then, the third indication information indicates to activate or deactivate one first association relationship set among the plurality of association relationship sets activated or deactivated indicated by the second indication information. Wherein, the third indication information is DCI.

[0294] S503. The network device sends first indication information to the terminal device.

[0295] S504. The terminal device determines first information according to the first association relationship set and the first indication information.

[0296] S505. The terminal device receives PDCCH according to the first information.

[0297] It should be noted that the execution processes of S503 - S505 can refer to the execution processes of S402 - S404, which will not be elaborated here.

[0298] In Figure 5 In the illustrated embodiment, the network device may first send a plurality of association relationship sets to the terminal device, and indicate to activate the first association relationship set among the plurality of association relationship sets through the second indication information, and indicate to activate at least one association relationship in the first association relationship set through the first indication information. The terminal device may determine that the first information includes at least one of the first association relationship, the second association relationship, or the third association relationship according to the first association relationship set and the first indication information. The terminal device may perform reception and joint decoding of PDCCH according to at least one of the first association relationship, the second association relationship, or the third association relationship, thereby increasing the probability of the terminal device successfully receiving PDCCH.

[0299] Based on any of the above embodiments, optionally, after the terminal device determines the first association relationship set, the network device may indicate to activate some association relationships in the first association relationship through MAC CE, and then indicate to activate at least one of the some association relationships through DCI. The terminal device may determine the first information according to the first association relationship set, MAC CE, and DCI, and receive PDCCH according to the first information. The specific process may refer to the above embodiments, which will not be elaborated here.

[0300] Figure 6 This is a schematic structural diagram of a communication device provided by an embodiment of the present application. The communication device 10 may be disposed in the terminal device. Please refer to Figure 6 , the communication device 10 may include a receiving module 11, wherein,

[0301] The receiving module 11 is configured to receive first information sent by a network device, where the first information is used to indicate an association relationship of physical downlink control channels (PDCCHs) sent by N transceiver points, and N is an integer greater than or equal to 2;

[0302] The receiving module 11 is further configured to receive PDCCH according to the first information.

[0303] The communication device provided in the embodiment of the present application can execute the technical solutions shown in the above method embodiments, and the implementation principles and beneficial effects are similar, which will not be elaborated here.

[0304] In a possible implementation manner, the first information is used to indicate at least one of the following:

[0305] A first association relationship between search spaces corresponding to N transceiver points; or,

[0306] A second association relationship between PDCCH candidate sets corresponding to N transceiver points, where the PDCCH candidate set includes at least one PDCCH candidate; or,

[0307] A third association relationship between PDCCH candidates corresponding to N transceiver points.

[0308] In a possible implementation manner, the first association relationship includes identifiers of search spaces corresponding to the N transceiver points.

[0309] In a possible implementation manner, N is 2, the N transceiver points include a first transceiver point and a second transceiver point, the search spaces corresponding to the N transceiver points include a first search space and a second search space, the first transceiver point corresponds to the first search space, and the second transceiver point corresponds to the second search space;

[0310] The first association relationship includes an identifier of the first search space and an identifier of the second search space.

[0311] In a possible implementation manner, the second association relationship includes identifiers of PDCCH candidate sets corresponding to N transceiver points.

[0312] In a possible implementation manner, N is 2, the N transceiver points include a first transceiver point and a second transceiver point, the PDCCH candidate sets corresponding to the N transceiver points include a first PDCCH candidate set and a second PDCCH candidate set, the first transceiver point corresponds to the first PDCCH candidate set, and the second transceiver point corresponds to the second PDCCH candidate set;

[0313] The second association relationship includes the identifier of the first PDCCH candidate set and the identifier of the second PDCCH candidate set.

[0314] In a possible implementation manner, the association relationship between the PDCCH candidate sets corresponding to the N transceiver points is preset;

[0315] The second association relationship includes: the identifiers of the PDCCH candidates included in each PDCCH candidate set among the N PDCCH candidate sets.

[0316] In a possible implementation manner, the third association relationship includes the identifiers of the PDCCH candidates corresponding to the N transceiver points.

[0317] In a possible implementation manner, N is 2, the N transceiver points include a first transceiver point and a second transceiver point, the PDCCH candidates corresponding to the N transceiver points include a first PDCCH candidate and a second PDCCH candidate, the first transceiver point corresponds to the first PDCCH candidate, and the second transceiver point corresponds to the second PDCCH candidate;

[0318] The third association relationship includes the identifier of the first PDCCH candidate and the identifier of the second PDCCH candidate.

[0319] In a possible implementation manner, the first information includes at least one of the following: the first association relationship, the second association relationship, or the third association relationship.

[0320] In a possible implementation manner, the receiving module 11 is specifically configured to:

[0321] Receive a first message sent by the network device, where the first message includes the first information;

[0322] Wherein, the first message includes at least one of the following messages: radio resource control (RRC) signaling, media access control unit (MAC) CE, downlink control information (DCI).

[0323] In a possible implementation manner, the device further includes a processing module 12, where

[0324] The processing module 12 is configured to obtain a first association relationship set, where the first association relationship set includes at least one of the following: at least one of the first association relationships, at least one of the second association relationships, or at least one of the third association relationships;

[0325] The receiving module 11 is further configured to receive first indication information sent by the network device, where the first indication information is used to indicate activation or deactivation of at least one association relationship in the first association relationship set;

[0326] The processing module 12 is further configured to determine the first information according to the first association relationship set and the first indication information.

[0327] In a possible implementation manner, the receiving module 11 is further configured to:

[0328] Receive the first association relationship set sent by the network device.

[0329] In a possible implementation manner, the receiving module 11 is specifically configured to:

[0330] Receive the RRC signaling sent by the network device, where the RRC signaling includes the first association relationship set.

[0331] In a possible implementation manner, the receiving module 11 is further configured to:

[0332] Receive multiple association relationship sets sent by the network device;

[0333] Receive second indication information sent by the network device, where the second indication information indicates activation of the first association relationship set in the multiple association relationship sets.

[0334] In a possible implementation manner, the receiving module 11 is specifically configured to:

[0335] Receive the RRC signaling sent by the network device, where the RRC signaling includes the multiple association relationship sets.

[0336] In a possible implementation manner, the receiving module 11 is specifically configured to:

[0337] Receive a second message sent by the network device, where the second message includes the second indication information, and the second message is a MAC CE or DCI.

[0338] In a possible implementation manner, the receiving module 11 is specifically configured to:

[0339] Receive a third message sent by the network device, where the third message includes the first indication information, and the third message is a MAC CE or DCI.

[0340] In a possible implementation manner, the receiving module 11 is specifically configured to:

[0341] Receive the MAC CE sent by the network device, where the MAC CE is used to indicate activating a subset of association relationships in the first set of association relationships;

[0342] Receive the DCI sent by the network device, where the DCI is used to indicate activating the at least one association relationship in the subset of association relationships.

[0343] The communication device provided in the embodiments of the present application can execute the technical solutions shown in the above method embodiments, and the implementation principles and beneficial effects are similar, and will not be elaborated here.

[0344] Figure 7 It is a schematic structural diagram of another communication device provided in the embodiments of the present application. This communication device 20 can be set in a network device. Please refer to Figure 7 This communication device 20 may include: a processing module 21 and a sending module 22, where,

[0345] The processing module 21 is configured to determine first information, where the first information is used to indicate the association relationship of the physical downlink control channel PDCCH sent by N transceiver points, N is an integer greater than or equal to 2, and the first information is used for the terminal device to receive the PDCCH;

[0346] The sending module 22 is configured to send the first information to the terminal device.

[0347] The communication device provided in the embodiments of the present application can execute the technical solutions shown in the above method embodiments, and the implementation principles and beneficial effects are similar, and will not be elaborated here.

[0348] In a possible implementation manner, the first information is used to indicate at least one of the following:

[0349] A first association relationship between search spaces corresponding to N transceiver points; or,

[0350] A second association relationship between PDCCH candidate sets corresponding to N transceiver points, where the PDCCH candidate set includes at least one PDCCH candidate; or,

[0351] A third association relationship between PDCCH candidates corresponding to N transceiver points.

[0352] In a possible implementation manner, the first association relationship includes identifiers of search spaces corresponding to the N transceiver points.

[0353] In a possible implementation, N is 2, the N transceiver points include a first transceiver point and a second transceiver point, the search spaces corresponding to the N transceiver points include a first search space and a second search space, the first transceiver point corresponds to the first search space, and the second transceiver point corresponds to the second search space;

[0354] The first association relationship includes the identifier of the first search space and the identifier of the second search space.

[0355] In a possible implementation, the second association relationship includes the identifiers of the PDCCH candidate sets corresponding to the N transceiver points.

[0356] In a possible implementation, N is 2, the N transceiver points include a first transceiver point and a second transceiver point, the PDCCH candidate sets corresponding to the N transceiver points include a first PDCCH candidate set and a second PDCCH candidate set, the first transceiver point corresponds to the first PDCCH candidate set, and the second transceiver point corresponds to the second PDCCH candidate set;

[0357] The second association relationship includes the identifier of the first PDCCH candidate set and the identifier of the second PDCCH candidate set.

[0358] In a possible implementation, the association relationship between the PDCCH candidate sets corresponding to the N transceiver points is preset;

[0359] The second association relationship includes: the identifiers of the PDCCH candidates included in each PDCCH candidate set among the N PDCCH candidate sets.

[0360] In a possible implementation, the third association relationship includes the identifiers of the PDCCH candidates corresponding to the N transceiver points.

[0361] In a possible implementation, N is 2, the N transceiver points include a first transceiver point and a second transceiver point, the PDCCH candidates corresponding to the N transceiver points include a first PDCCH candidate and a second PDCCH candidate, the first transceiver point corresponds to the first PDCCH candidate, and the second transceiver point corresponds to the second PDCCH candidate;

[0362] The third association relationship includes the identifier of the first PDCCH candidate and the identifier of the second PDCCH candidate.

[0363] In a possible implementation, the first information includes at least one of the following: the first association relationship, the second association relationship, or the third association relationship.

[0364] In a possible implementation manner, the sending module 22 is specifically configured to:

[0365] Send a first message to the terminal device, where the first message includes the first information;

[0366] Wherein, the first message includes at least one of the following messages: Radio Resource Control (RRC) signaling, Media Access Control unit (MAC) Control Element (CE), Downlink Control Information (DCI).

[0367] In a possible implementation manner, the sending module 22 is specifically configured to:

[0368] Send a first set of association relationships to the terminal device;

[0369] Send first indication information to the terminal device, where the first indication information is used to indicate activation or deactivation of at least one association relationship in the first set of association relationships.

[0370] In a possible implementation manner, the sending module 22 is specifically configured to:

[0371] Send RRC signaling to the terminal device, where the RRC signaling includes the first set of association relationships.

[0372] In a possible implementation manner, the sending module 22 is specifically configured to:

[0373] Send multiple sets of association relationships to the terminal device;

[0374] Send second indication information to the terminal device, where the second indication information indicates activation of the first set of association relationships in the multiple sets of association relationships;

[0375] Send first indication information to the terminal device, where the first indication information is used to indicate activation or deactivation of at least one association relationship in the first set of association relationships.

[0376] In a possible implementation manner, the sending module 22 is specifically configured to:

[0377] Send RRC signaling to the terminal device, where the RRC signaling includes the multiple sets of association relationships.

[0378] In a possible implementation manner, the sending module 22 is specifically configured to:

[0379] Send a second message to the terminal device, where the second message includes the second indication information, and the second message is MAC CE or DCI.

[0380] In a possible implementation manner, the sending module 22 is specifically configured to:

[0381] Send a third message to the terminal device, where the third message includes the first indication information, and the third message is a MAC CE or DCI.

[0382] In a possible implementation manner, the sending module 22 is specifically configured to:

[0383] Send a MAC CE to the terminal device, where the MAC CE is used to indicate activating an association relationship subset in the first association relationship set;

[0384] Send DCI to the terminal device, where the DCI is used to indicate activating the at least one association relationship in the association relationship subset.

[0385] The communication device provided in the embodiments of the present application can execute the technical solutions shown in the above method embodiments, and the implementation principles and beneficial effects are similar, and will not be elaborated here.

[0386] Figure 8 It is a schematic structural diagram of the terminal device provided in the embodiments of the present application. Please refer to Figure 8 , the terminal device 30 may include: a transceiver 31, a memory 32, and a processor 33. The transceiver 31 may include: a transmitter and / or a receiver. The transmitter may also be referred to as a sender, a transmitter, a sending port, or a sending interface, etc. with similar descriptions, and the receiver may also be referred to as a receiver, a receiver, a receiving port, or a receiving interface, etc. with similar descriptions. Exemplarily, the transceiver 31, the memory 32, and the processor 33 are interconnected with each other through a bus 34.

[0387] The memory 32 is used to store program instructions;

[0388] The processor 33 is used to execute the program instructions stored in the memory, so as to enable the terminal device 30 to execute the communication method shown in any of the above.

[0389] The transceiver 31 is used to execute the transceiver function of the terminal device 30 in the above communication method.

[0390] Figure 9 It is a schematic structural diagram of the network device provided in the embodiments of the present application. Please refer to Figure 9 , the network device 40 may include: a transceiver 41, a memory 42, and a processor 43. The transceiver 41 may include: a transmitter and / or a receiver. The transmitter may also be referred to as a sender, a transmitter, a sending port, or a sending interface, etc. with similar descriptions, and the receiver may also be referred to as a receiver, a receiver, a receiving port, or a receiving interface, etc. with similar descriptions. Exemplarily, the transceiver 41, the memory 42, and the processor 43 are interconnected with each other through a bus 44.

[0391] The memory 42 is used to store program instructions;

[0392] The processor 43 is used to execute the program instructions stored in the memory, so as to enable the network device 40 to execute the communication method shown in any of the above.

[0393] The transceiver 41 is used to execute the transceiver function of the network device 40 in the above communication method.

[0394] An embodiment of the present application provides a computer-readable storage medium, in which computer-executable instructions are stored. When the computer-executable instructions are executed by a processor, they are used to implement the above communication method.

[0395] An embodiment of the present application can also provide a computer program product, which can be executed by a processor. When the computer program product is executed, it can implement the communication method executed by the terminal device shown in any of the above.

[0396] An embodiment of the present application can also provide a computer program product, which can be executed by a processor. When the computer program product is executed, it can implement the communication method executed by the network device shown in any of the above.

[0397] The terminal device, network device, computer-readable storage medium and computer program product of the embodiments of the present application can execute the communication method executed by the terminal device above. For the specific implementation process and beneficial effects, please refer to the above, and details are not described herein again.

[0398] All or part of the steps of implementing the above method embodiments can be completed by hardware related to program instructions. The foregoing program can be stored in a readable memory. When the program is executed, it executes the steps including the above method embodiments; and the foregoing memory (storage medium) includes: read-only memory (abbreviation: ROM), RAM, flash memory, hard disk, solid state drive, magnetic tape, floppy disk, optical disc and any combination thereof.

[0399] Embodiments of the present application are described with reference to the flowcharts and / or block diagrams of methods, apparatuses (systems), and computer program products according to embodiments of the present application. It should be understood that each process and / or block in the flowchart and / or block diagram, and the combination of processes and / or blocks in the flowchart and / or block diagram, can be implemented by computer program instructions. These computer program instructions can be provided to the processing unit of a general-purpose computer, a special-purpose computer, an embedded processor, or other programmable data processing devices to generate a machine, such that the instructions executed by the processing unit of the computer or other programmable data processing devices generate a device for implementing the functions specified in one or more processes in the flowchart and / or one or more blocks in the block diagram.

[0400] These computer program instructions can also be stored in a computer-readable memory that can direct a computer or other programmable data processing device to work in a specific manner, such that the instructions stored in the computer-readable memory generate a manufactured article including an instruction device that implements the functions specified in one or more processes in the flowchart and / or one or more blocks in the block diagram.

[0401] These computer program instructions can also be loaded onto a computer or other programmable data processing device, such that a series of operation steps are executed on the computer or other programmable device to generate a computer-implemented process, so that the instructions executed on the computer or other programmable device provide steps for implementing the functions specified in one or more processes in the flowchart and / or one or more blocks in the block diagram.

[0402] Obviously, those skilled in the art can make various modifications and variations to the embodiments of the present application without departing from the spirit and scope of the present application. Thus, if these modifications and variations of the embodiments of the present application fall within the scope of the claims of the present application and their equivalent technologies, the present application is also intended to include these modifications and variations.

[0403] In the present application, the term "including" and its variations can mean non-restrictive inclusion; the term "or" and its variations can mean "and / or". In the present application, terms such as "first", "second", etc. are used to distinguish similar objects and do not necessarily need to describe a specific order or sequence. In the present application, "a plurality of" means two or more. "And / or" describes the association relationship of associated objects and indicates that three relationships can exist. For example, A and / or B can mean: A exists alone, A and B exist simultaneously, and B exists alone. The character " / " generally means that the associated objects before and after are in an "or" relationship.

Claims

1. A communication method, characterized in that, comprising: A terminal device receives first information sent by a network device, where the first information is used to indicate the association relationship of physical downlink control channels (PDCCHs) sent by N transceiver points, N being an integer greater than or equal to 2, and the first information is used to indicate one or more first association relationships between multiple search spaces corresponding to the N transceiver points; The terminal device receives a PDCCH according to the first information; The first association relationship means that there is an association relationship between different search spaces, and the PDCCHs detected in the different search spaces have an association relationship, that is, the same PDCCH is sent; The search spaces with the association relationship need to meet at least one of the following conditions: Having the same period; Occupying the same number of time slots within a period; The PDCCHs with the association relationship must have the same aggregation level.

2. The method according to claim 1, characterized in that, The first information is further used to indicate at least one of the following: A second association relationship between PDCCH candidate sets corresponding to N transceiver points, where the PDCCH candidate set includes at least one PDCCH candidate; or, A third association relationship between PDCCH candidates corresponding to N transceiver points.

3. The method according to claim 2, characterized in that, The first association relationship includes the identifiers of the search spaces corresponding to the N transceiver points.

4. The method according to claim 3, characterized in that, N is 2, the N transceiver points include a first transceiver point and a second transceiver point, the search spaces corresponding to the N transceiver points include a first search space and a second search space, the first transceiver point corresponds to the first search space, and the second transceiver point corresponds to the second search space; The first association relationship includes the identifier of the first search space and the identifier of the second search space.

5. The method according to claim 2, characterized in that, The second association relationship includes the identifiers of the PDCCH candidate sets corresponding to the N transceiver points.

6. The method according to claim 5, characterized in that, N is 2, the N transceiver points include a first transceiver point and a second transceiver point, the PDCCH candidate sets corresponding to the N transceiver points include a first PDCCH candidate set and a second PDCCH candidate set, the first transceiver point corresponds to the first PDCCH candidate set, and the second transceiver point corresponds to the second PDCCH candidate set; The second association relationship includes the identifier of the first PDCCH candidate set and the identifier of the second PDCCH candidate set.

7. The method according to claim 2, characterized in that, The association relationship between the PDCCH candidate sets corresponding to the N transceiver points is preset; The second association relationship includes: the identifiers of the PDCCH candidates included in each PDCCH candidate set among the N PDCCH candidate sets.

8. The method according to claim 2, characterized in that, The third association relationship includes the identifiers of the PDCCH candidates corresponding to the N transceiver points.

9. The method according to claim 8, wherein, N is 2, the N transceiver points include a first transceiver point and a second transceiver point, the PDCCH candidates corresponding to the N transceiver points include a first PDCCH candidate and a second PDCCH candidate, the first transceiver point corresponds to the first PDCCH candidate, and the second transceiver point corresponds to the second PDCCH candidate; the third association relationship includes the identifier of the first PDCCH candidate and the identifier of the second PDCCH candidate.

10. The method according to any one of claims 2-9, wherein, the first information includes at least one of the following: the first association relationship, the second association relationship, or the third association relationship.

11. The method according to claim 10, wherein, the terminal device receives the first information sent by the network device, including: the terminal device receives a first message sent by the network device, and the first message includes the first information; wherein, the first message includes at least one of the following messages: radio resource control (RRC) signaling, media access control element (MAC CE), downlink control information (DCI).

12. The method according to any one of claims 2-9, wherein, the terminal device receives the first information sent by the network device, including: the terminal device obtains a first association relationship set, and the first association relationship set includes at least one of the following: at least one of the first association relationships, at least one of the second association relationships, or at least one of the third association relationships; the terminal device receives a first indication information sent by the network device, and the first indication information is used to indicate to activate or deactivate at least one association relationship in the first association relationship set; the terminal device determines the first information according to the first association relationship set and the first indication information.

13. The method according to claim 12, wherein, the terminal device obtains a first association relationship set, including: the terminal device receives the first association relationship set sent by the network device.

14. The method according to claim 13, wherein, the terminal device receives the first association relationship set sent by the network device, including: the terminal device receives the RRC signaling sent by the network device, and the RRC signaling includes the first association relationship set.

15. The method according to claim 12, wherein, the terminal device obtains a first association relationship set, including: the terminal device receives a plurality of association relationship sets sent by the network device; the terminal device receives a second indication information sent by the network device, and the second indication information indicates to activate the first association relationship set in the plurality of association relationship sets.

16. The method according to claim 15, wherein, the terminal device receives a plurality of association relationship sets sent by the network device, including: the terminal device receives the RRC signaling sent by the network device, and the RRC signaling includes the plurality of association relationship sets.

17. The method according to claim 15 or 16, wherein, the receiving, by the terminal device, of the second indication information sent by the network device includes: the terminal device receives a second message sent by the network device, where the second indication information is included in the second message, and the second message is a MAC CE or DCI.

18. The method according to claim 17, wherein, the receiving, by the terminal device, of the first indication information sent by the network device includes: the terminal device receives a third message sent by the network device, where the first indication information is included in the third message, and the third message is a MAC CE or DCI.

19. The method according to claim 12, wherein, the receiving, by the terminal device, of the first indication information sent by the network device includes: the terminal device receives a MAC CE sent by the network device, where the MAC CE is used to indicate activating a subset of association relationships in the first set of association relationships; the terminal device receives a DCI sent by the network device, where the DCI is used to indicate activating the at least one association relationship in the subset of association relationships.

20. A communication method, wherein, it includes: the network device determines first information, where the first information is used to indicate the association relationship of physical downlink control channels (PDCCHs) sent by N transceiver points, N is an integer greater than or equal to 2, the first information is used for the terminal device to receive PDCCH, and the first information is used to indicate one or more first association relationships between multiple search spaces corresponding to the N transceiver points; the network device sends the first information to the terminal device; the first association relationship means that there is an association relationship between different search spaces, and the PDCCHs detected in the different search spaces have an association relationship, that is, the same PDCCH is sent; the search spaces having an association relationship need to meet at least one of the following conditions: having the same period; occupying the same number of time slots within a period; the PDCCHs having an association relationship must have the same aggregation level.

21. The method according to claim 20, wherein, the first information is further used to indicate at least one of the following: a second association relationship between PDCCH candidate sets corresponding to the N transceiver points, where the PDCCH candidate set includes at least one PDCCH candidate; or, a third association relationship between PDCCH candidates corresponding to the N transceiver points.

22. The method according to claim 21, wherein, the first association relationship includes the identifiers of the search spaces corresponding to the N transceiver points.

23. The method according to claim 22, wherein, N is 2, the N transceiver points include a first transceiver point and a second transceiver point, the search spaces corresponding to the N transceiver points include a first search space and a second search space, the first transceiver point corresponds to the first search space, and the second transceiver point corresponds to the second search space; The first association relationship includes the identifier of the first search space and the identifier of the second search space.

24. The method according to claim 21, wherein, the second association relationship includes the identifiers of the PDCCH candidate sets corresponding to N transceiver points.

25. The method according to claim 24, wherein, N is 2, the N transceiver points include a first transceiver point and a second transceiver point, the PDCCH candidate sets corresponding to the N transceiver points include a first PDCCH candidate set and a second PDCCH candidate set, the first transceiver point corresponds to the first PDCCH candidate set, and the second transceiver point corresponds to the second PDCCH candidate set; the second association relationship includes the identifier of the first PDCCH candidate set and the identifier of the second PDCCH candidate set.

26. The method according to claim 21, wherein, the association relationship between the PDCCH candidate sets corresponding to the N transceiver points is preset; the second association relationship includes: the identifiers of the PDCCH candidates included in each of the PDCCH candidate sets among the N PDCCH candidate sets.

27. The method according to claim 21, wherein, the third association relationship includes the identifiers of the PDCCH candidates corresponding to N transceiver points.

28. The method according to claim 27, wherein, N is 2, the N transceiver points include a first transceiver point and a second transceiver point, the PDCCH candidates corresponding to the N transceiver points include a first PDCCH candidate and a second PDCCH candidate, the first transceiver point corresponds to the first PDCCH candidate, and the second transceiver point corresponds to the second PDCCH candidate; the third association relationship includes the identifier of the first PDCCH candidate and the identifier of the second PDCCH candidate.

29. The method according to any one of claims 21-28, wherein, the first information includes at least one of the following: the first association relationship, the second association relationship, or the third association relationship.

30. The method according to claim 29, wherein, the network device sending the first information to the terminal device includes: the network device sending a first message to the terminal device, and the first message includes the first information; wherein, the first message includes at least one of the following messages: radio resource control (RRC) signaling, media access control element (MAC CE), downlink control information (DCI).

31. The method according to any one of claims 21-28, wherein, the network device sending the first information to the terminal device includes: the network device sending a first association relationship set to the terminal device; the network device sending first indication information to the terminal device, and the first indication information is used to indicate activation or deactivation of at least one association relationship in the first association relationship set.

32. The method according to claim 31, wherein, The network device sends a first association relationship set to the terminal device, including: The network device sends an RRC signaling to the terminal device, and the first association relationship set is included in the RRC signaling.

33. The method according to any one of claims 21-28, characterized in that, The network device sends the first information to the terminal device, including: The network device sends a plurality of association relationship sets to the terminal device; The network device sends second indication information to the terminal device, and the second indication information indicates to activate a first association relationship set among the plurality of association relationship sets; The network device sends first indication information to the terminal device, and the first indication information is used to indicate to activate or deactivate at least one association relationship in the first association relationship set.

34. The method according to claim 33, characterized in that, The network device sends a plurality of association relationship sets to the terminal device, including: The network device sends an RRC signaling to the terminal device, and the plurality of association relationship sets are included in the RRC signaling.

35. The method according to claim 34, characterized in that, The network device sends second indication information to the terminal device, including: The network device sends a second message to the terminal device, and the second indication information is included in the second message, and the second message is a MAC CE or DCI.

36. The method according to claim 35, characterized in that, The network device sends first indication information to the terminal device, including: The network device sends a third message to the terminal device, and the first indication information is included in the third message, and the third message is a MAC CE or DCI.

37. The method according to claim 35, characterized in that, The network device sends first indication information to the terminal device, including: The network device sends a MAC CE to the terminal device, and the MAC CE is used to indicate to activate an association relationship subset in the first association relationship set; The network device sends DCI to the terminal device, and the DCI is used to indicate to activate the at least one association relationship in the association relationship subset.

38. A communication device, characterized in that, including a receiving module, wherein, The receiving module is configured to receive first information sent by a network device, where the first information is used to indicate an association relationship of a physical downlink control channel PDCCH sent by N transceiver points, and N is an integer greater than or equal to 2, and the first information is used to indicate one or more first association relationships among a plurality of search spaces corresponding to the N transceiver points; The receiving module is further configured to receive a PDCCH according to the first information; The first association relationship refers to an association relationship between different search spaces, and PDCCHs detected in the different search spaces have an association relationship, that is, the same PDCCH is sent; The search spaces having an association relationship need to satisfy at least one of the following conditions: Having the same period; Occupying the same number of time slots within a period; PDCCHs with an associated relationship must have the same aggregation level.

39. A communication device, characterized in that, comprising: a processing module and a transmitting module, wherein, the processing module is configured to determine first information for indicating an association relationship of physical downlink control channels (PDCCHs) transmitted by N transceiver points, where N is an integer greater than or equal to 2, the first information is for a terminal device to receive PDCCHs, and the first information is for indicating one or more first association relationships between a plurality of search spaces corresponding to the N transceiver points; the transmitting module is configured to transmit the first information to the terminal device; the first association relationship means that there is an association relationship between different search spaces, and the PDCCHs detected in the different search spaces have an association relationship, that is, the same PDCCH is transmitted; the search spaces with an association relationship need to satisfy at least one of the following conditions: having the same period; occupying the same number of time slots within a period; PDCCHs with an associated relationship must have the same aggregation level.

40. A terminal device, characterized in that, comprising: a transceiver, a processor, and a memory; the memory stores computer-executable instructions; the processor executes the computer-executable instructions stored in the memory, so that the processor executes the communication method according to any one of claims 1 to 19.

41. A network device, characterized in that, comprising: a transceiver, a processor, and a memory; the memory stores computer-executable instructions; the processor executes the computer-executable instructions stored in the memory, so that the processor executes the communication method according to any one of claims 20 to 37.

42. A computer-readable storage medium, characterized in that, the computer-readable storage medium stores computer-executable instructions, which are used to implement the communication method according to any one of claims 1 to 37 when the computer-executable instructions are executed by a processor.

Images