Wireless communication method, terminal device, and transmission and reception node

Abstract

The embodiment of the present application discloses a method, a terminal device, and a transmission and receiving node for wireless communication, the method comprising: the terminal device receives first downlink control information in a first time domain scheduling unit; the terminal device obtains information of second downlink control information to be detected in the first time domain scheduling unit according to the first downlink control information. The method, the terminal device, and the transmission and receiving node of the embodiment of the present application are conducive to reducing the complexity of the terminal device detecting PDCCH.

Description

Technical Field

[0001] The embodiments of the present application relate to the field of communications, and more specifically, to a wireless communication method, terminal equipment, and transmission and reception nodes. Background Art

[0002] In the current New Radio (NR) or 5G discussions, a terminal device may receive multiple Physical Downlink Control Channels (PDCCHs), each of which indicates relevant information about a corresponding data. Similarly, the terminal device needs to detect multiple PDCCHs at the same time, which is relatively complex. Summary of the invention

[0003] In view of this, an embodiment of the present application provides a wireless communication method, a terminal device, and a transmission and receiving node, which are conducive to reducing the complexity of the terminal device detecting the PDCCH.

[0004] In a first aspect, a method for wireless communication is provided, the method comprising: a terminal device receives first downlink control information in a first time domain scheduling unit; the terminal device obtains information of second downlink control information to be detected in the first time domain scheduling unit based on the first downlink control information.

[0005] Acquiring the second downlink control information from the first downlink control information is helpful to reducing the complexity of detecting PDCCH by the terminal device.

[0006] Optionally, in an embodiment of the present application, the network device may associate each downlink control information with other downlink control information. The format size of the downlink control information may be mapped to the number of subsequent downlink control information. After receiving the downlink control information, the terminal device may obtain the number of subsequent downlink control information according to the format size of the downlink control information. The formats of all downlink control information to be sent by the network device may also be set to be the same. Then, after detecting the first downlink control information, the terminal device may detect the second downlink control information according to the format of the first downlink control information.

[0007] In a possible implementation, the first downlink control information carries information about the second downlink control information, and the terminal device obtains information about the second downlink control information to be detected in the first time domain scheduling unit based on the first downlink control information, including: the terminal device obtains information about the second downlink control information from the first downlink control information.

[0008] In a possible implementation, the method further includes: the terminal device detecting the second downlink control information in the first time domain scheduling unit according to information of the second downlink control information.

[0009] In one possible implementation, the information of the second downlink control information includes at least one of the following information: a search space of the second downlink control information, an aggregation level of the second downlink control information, a resource location of the second downlink control information, a size of the second downlink control information, a format of the second downlink control information, beam information for receiving and / or sending the second downlink control information, and quasi-co-location information of the second downlink control information.

[0010] In a possible implementation, the method also includes: the terminal device determines the number N of the second downlink control information based on information of the two downlink control information, where N is an integer, N≤(M-1), M is the number of downlink control information preconfigured by the network device for the terminal device, and M is a positive integer; if N is a positive integer, the terminal device learns that there are N second downlink control information in the first time domain scheduling unit; or if N is 0, the terminal device learns that the second downlink control information does not exist in the first time domain scheduling unit.

[0011] When the amount of downlink control information sent by the network device to the terminal device is less than the amount of downlink control information configured by the network device, the complexity of blind detection of the terminal device can be reduced, and the power consumption of the terminal device can also be reduced.

[0012] In one possible implementation, the information of the second downlink control information is the number N of the second downlink control information or the number (N+1) of downlink control information sent by the transmitting and receiving nodes, and the downlink control information sent by the transmitting and receiving nodes includes the first downlink control information and the second downlink control information.

[0013] In a possible implementation, the method further includes: the terminal device receiving indication information sent by the network device, where the indication information is used to instruct the terminal device to receive multiple downlink control information in the first time domain scheduling unit.

[0014] In a possible implementation manner, the first downlink control information and the second downlink control information are sent by different transmitting nodes and receiving nodes.

[0015] In a second aspect, a method for wireless communication is provided, the method comprising: a first transmission and receiving node sends first downlink control information to a terminal device in a first time domain scheduling unit, the first downlink control information carries information of second downlink control information to be detected by the terminal device in the first time domain scheduling unit, and the second downlink control information is used to indicate downlink resources allocated for second downlink data.

[0016] In one possible implementation, the information of the second downlink control information includes at least one of the following information: a search space of the second downlink control information, an aggregation level of the second downlink control information, a resource location of the second downlink control information, a size of the second downlink control information, a format of the second downlink control information, beam information for receiving and / or sending the second downlink control information, and quasi-co-location information of the second downlink control information.

[0017] In a possible implementation, the information of the second downlink control information is the number N of the second downlink control information or the number (N+1) of downlink control information sent by at least one transmission and receiving node, and the at least one transmission and receiving node includes the first transmission and receiving node, N is an integer, N≤(M-1), M is the number of downlink control information preconfigured by the network device for the terminal device, and M is a positive integer.

[0018] In a possible implementation manner, the second downlink control information is sent by the second transmitting and receiving node.

[0019] In a third aspect, a terminal device is provided, which is used to execute the method in the first aspect or any possible implementation of the first aspect. Specifically, the terminal device includes a unit for executing the method in the first aspect or any possible implementation of the first aspect.

[0020] In a fourth aspect, a transmission and receiving node is provided, which is used to execute the method in the second aspect or any possible implementation of the second aspect. Specifically, the transmission and receiving node includes a unit for executing the method in the second aspect or any possible implementation of the second aspect.

[0021] In a fifth aspect, a terminal device is provided, the terminal device comprising: a memory, a processor, an input interface, and an output interface. The memory, the processor, the input interface, and the output interface are connected via a bus system. The memory is used to store instructions, and the processor is used to execute the instructions stored in the memory, so as to execute the method in the first aspect or any possible implementation of the first aspect.

[0022] In a sixth aspect, a transmission and receiving node is provided, the transmission and receiving node comprising: a memory, a processor, an input interface, and an output interface. The memory, the processor, the input interface, and the output interface are connected via a bus system. The memory is used to store instructions, and the processor is used to execute the instructions stored in the memory, so as to execute the method in the second aspect or any possible implementation of the second aspect.

[0023] In the seventh aspect, a computer storage medium is provided for storing computer software instructions used to execute the method in the first aspect or any possible implementation of the first aspect, or the method in the second aspect or any possible implementation of the second aspect, which includes a program designed for executing the above aspects.

[0024] These and other aspects of the present application will become more clearly understood in the description of the following embodiments. BRIEF DESCRIPTION OF THE DRAWINGS

[0025] Figure 1 A schematic diagram showing an application scenario of an embodiment of the present application.

[0026] Figure 2 A schematic block diagram of a wireless communication method according to an embodiment of the present application is shown.

[0027] Figure 3 Another schematic block diagram of a wireless communication method according to an embodiment of the present application is shown.

[0028] Figure 4 A schematic block diagram of a terminal device according to an embodiment of the present application is shown.

[0029] Figure 5 A schematic block diagram of a transmission and receiving node according to an embodiment of the present application is shown.

[0030] Figure 6 Another schematic block diagram of a terminal device according to an embodiment of the present application is shown.

[0031] Figure 7 Another schematic block diagram of the transmission and receiving nodes of an embodiment of the present application is shown. DETAILED DESCRIPTION

[0032] The technical solutions in the embodiments of the present application will be clearly and completely described below in conjunction with the drawings in the embodiments of the present application.

[0033] It should be understood that the technical solutions of the embodiments of the present application can be applied to various communication systems, such as: Global System of Mobile communication (GSM) system, Code Division Multiple Access (CDMA) system, Wideband Code Division Multiple Access (WCDMA) system, General Packet Radio Service (GPRS), Long Term Evolution (LTE) system, LTE Frequency Division Duplex (FDD) system, LTE Time Division Duplex (TDD), Universal Mobile Telecommunication System (UMTS), Worldwide Interoperability for Microwave Access (WiMAX) communication system or future 5G system, etc.

[0034] In particular, the technical solutions of the embodiments of the present application can be applied to various communication systems based on non-orthogonal multiple access technology, such as sparse code multiple access (SCMA) system, low density signature (LDS) system, etc. Of course, the SCMA system and the LDS system may also be called other names in the field of communication; further, the technical solutions of the embodiments of the present application can be applied to multi-carrier transmission systems using non-orthogonal multiple access technology, such as orthogonal frequency division multiplexing (OFDM), filter bank multi-carrier (FBMC), generalized frequency division multiplexing (GFDM), filtered orthogonal frequency division multiplexing (F-OFDM) system, etc.

[0035] The terminal device in the embodiments of the present application may refer to a user equipment (UE), an access terminal, a user unit, a user station, a mobile station, a mobile station, a remote station, a remote terminal, a mobile device, a user terminal, a terminal, a wireless communication device, a user agent or a user device. The access terminal may be a cellular phone, a cordless phone, a Session Initiation Protocol (SIP) phone, a Wireless Local Loop (WLL) station, a Personal Digital Assistant (PDA), a handheld device with wireless communication function, a computing device or other processing device connected to a wireless modem, a vehicle-mounted device, a wearable device, a terminal device in a future 5G network or a terminal device in a future evolved Public Land Mobile Network (PLMN), etc., and the embodiments of the present application are not limited.

[0036] The network device in the embodiment of the present application can be a device for communicating with a terminal device. The network device can be a base station (Base Transceiver Station, BTS) in GSM or CDMA, or a base station (NodeB, NB) in a WCDMA system, or an evolved base station (Evolutional NodeB, eNB or eNodeB) in an LTE system, or a wireless controller in a cloud radio access network (Cloud Radio Access Network, CRAN) scenario, or the network device can be a relay station, an access point, a vehicle-mounted device, a wearable device, a network device in a future 5G network, or a network device in a future evolved PLMN network, etc., and the embodiments of the present application are not limited.

[0037] The network in the 5G system is different from the traditional 3G and 4G systems. 5G uses multiple frequencies (high, low and unlicensed frequency bands) and multiple layers of overlap (such as macro cells + micro cells). When implementing multiple connections, the connection from UE to the network comes from multiple transmission and reception points at multiple frequencies. Figure 1 As shown, Figure 1 The communication system in the embodiment may include a terminal device 10 and a network device 20, wherein the network device 20 includes a first transmission and reception point (TRP) 21 and a second TRP 22. The network device 20 is used to provide communication services for the terminal device 10 and access the core network. The terminal device 10 accesses the network by searching for synchronization signals, broadcast signals, etc. sent by the network device 20, thereby communicating with the network. Figure 1The arrows shown in may represent uplink / downlink transmissions performed via a cellular link between the terminal device 10 and the network device 20 .

[0038] In the current 5G / NR discussion, a terminal device may receive multiple physical downlink control channels (PDCCHs) in a time domain scheduling unit, where each PDCCH can indicate relevant information of a corresponding data, such as the resource location or transmission format occupied by the corresponding data. The terminal device needs to blindly detect multiple PDCCHs belonging to itself in the corresponding time domain scheduling unit. In order to reduce the complexity of blindly detecting multiple PDCCHs, some optimization processing is required.

[0039] To facilitate the subsequent description, here is a brief introduction to the process of PDCCH blind detection. Specifically, the terminal device generally does not know the number of control channel elements (Control Channel Element, CCE) currently occupied by the PDCCH, what downlink control information (Downlink Control Information, DCI) format is transmitted, and does not know where the information it needs is. However, the terminal device knows what information it is currently expecting. For example, in the idle state, the terminal device expects a paging message; when there is uplink data waiting to be sent, it expects an uplink authorization, etc. For different expected information, the terminal device uses the corresponding Radio Network Temporary Identifier (RNTI) to perform a cyclic redundancy check with the CCE information. If the cyclic redundancy check is successful, then the terminal device knows that this information is what it needs, and can further know the corresponding DCI format and modulation method, thereby deciphering the DCI content. This is the so-called blind detection process.

[0040] Figure 2 FIG. 1 is a schematic block diagram of a wireless communication method 100 according to an embodiment of the present application. Figure 2 As shown, the method 100 includes:

[0041] S110, the terminal device receives first downlink control information in the first time domain scheduling unit;

[0042] S120, the terminal device obtains information of second downlink control information to be detected in the first time domain scheduling unit according to the first downlink control information.

[0043] Downlink control information is carried by the physical downlink control channel PDCCH. It is control information sent by the network device to the terminal device and is used to schedule the data of the terminal device. It mainly includes resource allocation of uplink and downlink data, hybrid automatic repeat request (HARQ) information, power control information, etc. With the development of wireless communications, network equipment may configure multiple PDCCHs in a time domain scheduling unit, and the downlink control information carried in these multiple PDCCHs may be scheduling information used to indicate different data. In order to reduce the complexity of blind detection of PDCCH by terminal devices, multiple PDCCHs in the same time domain scheduling unit can be associated. For example, some information is configured in each downlink control information to indicate information of other downlink control information. In this way, after detecting the first downlink control information, the terminal device can further obtain some information of the second downlink control information, so that the terminal device can reduce the complexity of blind detection.

[0044] Optionally, in an embodiment of the present application, the network device may associate each downlink control information with other downlink control information. For example, the format size of the downlink control information may be mapped to the number of subsequent downlink control information. Specifically, if the number of bits of the downlink control information is 5 bits, it indicates that the number of subsequent downlink control information is 0; if the number of bits of the downlink control information is 6 bits, it indicates that the number of subsequent downlink control information is 1, and so on. Then, after receiving the downlink control information, the terminal device can obtain the number of subsequent downlink control information according to the format size of the downlink control information. For another example, the format of all downlink control information to be sent by the network device can be set to be the same. Then, after detecting the first downlink control information, the terminal device can detect the second downlink control information according to the format of the first downlink control information.

[0045] Optionally, in an embodiment of the present application, the first downlink control information carries information of the second downlink control information, and the terminal device obtains information of the second downlink control information to be detected in the first time domain scheduling unit based on the first downlink control information, including: the terminal device obtains information of the second downlink control information from the first downlink control information.

[0046] Specifically, a dedicated bit may be set in each downlink control information to indicate information of the second downlink control information. For example, 4 bits may be set to indicate the format of the second downlink control information, or to indicate the resource location of the second downlink control information, etc., or a dedicated bit may be set to indicate the number of second downlink control information.

[0047] Optionally, in an embodiment of the present application, the method further includes: the terminal device detects the second downlink control information in the first time domain scheduling unit according to information of the second downlink control information.

[0048] If the first downlink control information carries information about the existing second downlink control information, the terminal device detects the second downlink control information in the first scheduling unit after acquiring the information. Specifically, the information about the second downlink control information includes, but is not limited to, at least one of the following information: a search space for the second downlink control information, an aggregation level for the second downlink control information, a resource location for the second downlink control information, a size for the second downlink control information, a format for the second downlink control information, beam information for receiving and / or sending the second downlink control information, and quasi-co-location information for the second downlink control information.

[0049] The above describes the process of blind detection of PDCCH by terminal equipment. If the terminal equipment searches in the order of CCE, the amount of calculation of the terminal equipment is considerable, especially for systems with large bandwidth and a large number of CCE. For this reason, the concept of search space is defined in the protocol, and some restrictions are placed on the possible placement of PDCCHs of different formats in the system. Each PDCCH of different formats corresponds to a different search space. In other words, if the search space of the second downlink control information is carried in the first downlink control information, the terminal equipment can obtain the placement of the second downlink control information, thereby reducing the complexity of blind detection by the terminal equipment.

[0050] Usually, the number of CCEs included in a PDCCH channel is called the aggregation level of CCEs, which can be, for example, 1, 2, 4, or 8 consecutive CCEs. In other words, if the first downlink control information carries the aggregation level of the second downlink control information, the terminal device will know the number of CCEs included in the PDCCH carrying the second downlink control information, so that the terminal device can reduce the complexity when blindly detecting the second downlink control information.

[0051] Or if the first downlink control information carries the location of the resources occupied by the second downlink control information, the terminal device does not need to perform blind detection in the control resource area of ​​the entire time domain scheduling unit, and can directly receive the second downlink control information at the location indicated by the information of the second downlink control information carried in the first downlink control information.

[0052] In addition, if the first downlink control information carries the second downlink control information, such as the size of the second downlink control information, the format of the second downlink control information, the beam information for receiving and / or sending the second downlink control information, and the quasi-co-location information of the second downlink control information, similarly, the terminal device can acquire such information of the second downlink control information in advance, thereby reducing the detection complexity when detecting the second downlink control information.

[0053] Optionally, in an embodiment of the present application, the method also includes: the terminal device determines the number N of the second downlink control information based on information of the two downlink control information, where N is an integer, N≤(M-1), M is the number of downlink control information preconfigured by the network device for the terminal device, and M is a positive integer; if N is a positive integer, the terminal device learns that there are N second downlink control information in the first time domain scheduling unit; or if N is 0, the terminal device learns that the second downlink control information does not exist in the first time domain scheduling unit.

[0054] Specifically, the terminal device can determine the amount of the second downlink control information or determine whether there is any subsequent second downlink control information based on the information of the acquired second downlink control information. Therefore, when the amount of downlink control information sent by the network device to the terminal device is less than the amount of downlink control information configured by the network device, the complexity of the blind detection of the terminal device can be reduced, and the power consumption of the terminal device can also be reduced.

[0055] Normally, the network device will pre-configure the number of downlink control information for the terminal device or the number of downlink control information will be negotiated between the terminal device and the network device, and then the terminal device can blindly detect the downlink control information according to this number. If the downlink control information sent by the network device in a certain time domain scheduling unit is just less than the number pre-configured by the network or the number specified by the protocol, then the terminal device does not need to blindly detect so many times, thereby reducing the complexity of the terminal blind detection. For example, if the number pre-configured by the network device is 5, and the network actually only sends 3 downlink control information to the terminal device in a certain time domain scheduling unit, then the terminal device only needs to detect 3 downlink control information, and there is no need to continue to detect the next two. For another example, if the network device is only configured to send one downlink control information, then the terminal device stops subsequent detection after detecting the downlink control information.

[0056] Optionally, the information of the second downlink control information is the number N of the second downlink control information or the number (N+1) of downlink control information sent by the transmitting and receiving nodes, and the downlink control information sent by the transmitting and receiving nodes includes the first downlink control information and the second downlink control information.

[0057] That is to say, the information used to determine the number of second downlink control information can be the number of second downlink control information other than the first downlink control information, or the number of all downlink control information sent by all network devices. In this way, the terminal device can calculate the number of second downlink control information based on all numbers.

[0058] For example, the information of the second downlink control information indicates that the network device has sent a total of X PDCCHs. Therefore, if a PDCCH is received, which indicates 1 PDCCH, the UE no longer needs to try to detect the second PDCCH; if a PDCCH is received, which indicates 2 PDCCHs, when the UE tries to detect the second NR-PDCCH, if the detection fails, it can feedback NACK to the network.

[0059] For another example, the information of the second downlink control information indicates that the network device has sent Y PDCCHs in addition to itself. Therefore, if a PDCCH is received, which indicates that there are 0 PDCCHs, the UE no longer needs to try to detect the second PDCCH; if a PDCCH is received, which indicates that there is 1 PDCCH, when the UE tries to detect the second PDCCH, if the detection fails, it can feedback NACK to the network.

[0060] Optionally, in an embodiment of the present application, the method further includes: the terminal device receives indication information sent by the network device, and the indication information is used to instruct the terminal device to receive multiple downlink control information in the first time domain scheduling unit.

[0061] Specifically, the network can instruct the terminal device to enter the following modes through configuration: First, the network can instruct the terminal device to switch from a mode of receiving one PDCCH to a mode of receiving multiple PDCCHs. In this mode, the terminal device determines to use the above solution; the network device can also directly instruct the terminal device to detect multiple PDCCHs. For example, the network device can use a bit to indicate whether it is a multi-PDCCH mode. If the bit is 0, it can indicate a single PDCCH mode, and if the bit is 1, it can indicate a multi-PDCCH mode, etc.

[0062] Optionally, in an embodiment of the present application, the first downlink control information and the second downlink control information are sent by different transmission and reception nodes. Usually, the above-mentioned multiple PDCCHs are transmitted through multiple TRPs, or they can be transmitted by the same TRP, but the embodiment of the present application is not limited thereto.

[0063] It should be understood that the TRP can be the above-mentioned network equipment, such as a base station. It can also be a microcell, a hotspot, etc. As long as the equipment can provide network services to the terminal equipment, it can be the TRP of the embodiment of the present application.

[0064] Figure 3 FIG. 2 is a schematic block diagram of a wireless communication method 200 according to an embodiment of the present application. Figure 3 As shown, the method 200 includes:

[0065] S210, the first transmission and receiving node sends first downlink control information to the terminal device in the first time domain scheduling unit, and the first downlink control information carries information of second downlink control information to be detected by the terminal device in the first time domain scheduling unit, and the second downlink control information is used to indicate the downlink resources allocated for the second downlink data.

[0066] Therefore, the wireless communication method of the embodiment of the present application is conducive to reducing the complexity of terminal equipment detecting PDCCH.

[0067] Optionally, in an embodiment of the present application, the information of the second downlink control information includes at least one of the following information: a search space of the second downlink control information, an aggregation level of the second downlink control information, a resource location of the second downlink control information, a size of the second downlink control information, a format of the second downlink control information, beam information for receiving and / or sending the second downlink control information, and quasi-co-location information of the second downlink control information.

[0068] Optionally, in an embodiment of the present application, the information of the second downlink control information is the number N of the second downlink control information or the number (N+1) of downlink control information sent by at least one transmission and receiving node, and the at least one transmission and receiving node includes the first transmission and receiving node, N is an integer, N≤(M-1), M is the number of downlink control information preconfigured by the network device for the terminal device, and M is a positive integer.

[0069] Optionally, in an embodiment of the present application, the second downlink control information is sent by a second transmitting and receiving node.

[0070] It should be understood that the interaction between the network device and the terminal device and the related characteristics and functions described by the network device correspond to the related characteristics and functions of the terminal device. In other words, what information the terminal device sends to the network device, the network device will receive the corresponding information. For the sake of brevity, it will not be repeated here. It should also be understood that in various embodiments of the present application, the size of the sequence number of the above-mentioned processes does not mean the order of execution, and the execution order of each process should be determined by its function and internal logic, and should not constitute any limitation on the implementation process of the embodiments of the present application.

[0071] Figure 4 FIG. 1 is a schematic block diagram of a wireless communication terminal device 300 according to an embodiment of the present application. Figure 4 As shown, the terminal device 300 includes:

[0072] A first receiving unit 310, configured to receive first downlink control information in a first time domain scheduling unit;

[0073] The acquisition unit 320 is configured to acquire information of second downlink control information to be detected in the first time domain scheduling unit according to the first downlink control information.

[0074] Therefore, the wireless communication terminal device of the embodiment of the present application is helpful in reducing the complexity of the terminal device detecting PDCCH.

[0075] Optionally, in an embodiment of the present application, the first downlink control information carries information of the second downlink control information, and the acquisition unit 320 is specifically used to: acquire information of the second downlink control information from the first downlink control information.

[0076] Optionally, in the embodiment of the present application, the terminal device 300 further includes: a detection unit 330, configured to detect the second downlink control information in the first time domain scheduling unit according to information of the second downlink control information.

[0077] Optionally, in an embodiment of the present application, the information of the second downlink control information includes at least one of the following information: a search space of the second downlink control information, an aggregation level of the second downlink control information, a resource location of the second downlink control information, a size of the second downlink control information, a format of the second downlink control information, beam information for receiving and / or sending the second downlink control information, and quasi-co-location information of the second downlink control information.

[0078] Optionally, in an embodiment of the present application, the terminal device 300 also includes: a determination unit 340, used to determine the number N of the second downlink control information based on the information of the two downlink control information, where N is an integer, N≤(M-1), and M is the number of downlink control information preconfigured by the network device for the terminal device, and M is a positive integer; an acquisition unit 350, used to, if N is a positive integer, acquire that there are N second downlink control information in the first time domain scheduling unit; or if N is 0, acquire that the second downlink control information does not exist in the first time domain scheduling unit.

[0079] Optionally, in an embodiment of the present application, the information of the second downlink control information is the number N of the second downlink control information or the number (N+1) of downlink control information sent by the transmitting and receiving nodes, and the downlink control information sent by the transmitting and receiving nodes includes the first downlink control information and the second downlink control information.

[0080] Optionally, in an embodiment of the present application, the terminal device 300 further includes: a second receiving unit 360, used to receive indication information sent by a network device, wherein the indication information is used to instruct the terminal device to receive multiple downlink control information in the first time domain scheduling unit.

[0081] Optionally, in an embodiment of the present application, the first downlink control information and the second downlink control information are sent by different transmitting and receiving nodes.

[0082] It should be understood that the terminal device 300 for wireless communication according to the embodiment of the present application may correspond to the terminal device in the method embodiment of the present application, and the above and other operations and / or functions of each unit in the terminal device 300 are respectively to implement Figure 2 For the sake of brevity, the corresponding processes of the terminal device in the method are not repeated here.

[0083] Figure 5 FIG. 4 is a schematic block diagram of a transmission and receiving node 400 according to an embodiment of the present application. Figure 5 As shown, the transmission and reception node 400 includes:

[0084] The sending unit 410 is used to send first downlink control information to the terminal device in the first time domain scheduling unit, and the first downlink control information carries information of the second downlink control information to be detected by the terminal device in the first time domain scheduling unit, and the second downlink control information is used to indicate the downlink resources allocated for the second downlink data.

[0085] Therefore, the transmission and receiving nodes of the embodiments of the present application are helpful in reducing the complexity of terminal devices detecting PDCCH.

[0086] Optionally, in an embodiment of the present application, the information of the second downlink control information includes at least one of the following information: a search space of the second downlink control information, an aggregation level of the second downlink control information, a resource location of the second downlink control information, a size of the second downlink control information, a format of the second downlink control information, beam information for receiving and / or sending the second downlink control information, and quasi-co-location information of the second downlink control information.

[0087] Optionally, in an embodiment of the present application, the information of the second downlink control information is the number N of the second downlink control information or the number (N+1) of downlink control information sent by at least one transmission and receiving node, and the at least one transmission and receiving node includes the first transmission and receiving node, N is an integer, N≤(M-1), M is the number of downlink control information preconfigured by the network device for the terminal device, and M is a positive integer.

[0088] Optionally, in an embodiment of the present application, the second downlink control information is sent by a second transmitting and receiving node.

[0089] It should be understood that the transmission and receiving node 400 according to the embodiment of the present application may correspond to the transmission and receiving node in the method embodiment of the present application, and the above and other operations and / or functions of each unit in the transmission and receiving node 400 are respectively to implement Figure 3 For the sake of brevity, the corresponding processes of the network devices in the method are not repeated here.

[0090] like Figure 6 As shown, the embodiment of the present application also provides a terminal device 500, which can be Figure 5 The terminal device 300 in Figure 2 The terminal device 500 includes: an input interface 510, an output interface 520, a processor 530 and a memory 540, and the input interface 510, the output interface 520, the processor 530 and the memory 540 can be connected through a bus system. The memory 540 is used to store programs, instructions or codes. The processor 530 is used to execute the programs, instructions or codes in the memory 540 to control the input interface 510 to receive signals, control the output interface 520 to send signals, and complete the operations in the aforementioned method embodiment.

[0091] Therefore, the terminal device of the embodiment of the present application is helpful in reducing the complexity of the terminal device detecting PDCCH.

[0092] It should be understood that in the embodiment of the present application, the processor 530 may be a central processing unit (CPU), and the processor 530 may also be other general-purpose processors, digital signal processors, application-specific integrated circuits, off-the-shelf programmable gate arrays or other programmable logic devices, discrete gate or transistor logic devices, discrete hardware components, etc. A general-purpose processor may be a microprocessor or the processor may also be any conventional processor, etc.

[0093] The memory 540 may include a read-only memory and a random access memory, and provide instructions and data to the processor 530. A portion of the memory 540 may also include a nonvolatile random access memory. For example, the memory 540 may also store information on the device type.

[0094] In the implementation process, the contents of the above method can be completed by the hardware integrated logic circuit in the processor 530 or the instructions in the form of software. The contents of the method disclosed in the embodiment of the present application can be directly embodied as a hardware processor for execution, or a combination of hardware and software modules in the processor for execution. The software module can be located in a mature storage medium in the field such as a random access memory, a flash memory, a read-only memory, a programmable read-only memory or an electrically erasable programmable memory, a register, etc. The storage medium is located in the memory 540, and the processor 530 reads the information in the memory 540 and completes the contents of the above method in combination with its hardware. To avoid repetition, it is not described in detail here.

[0095] In a specific implementation manner, the acquisition unit 320, the detection unit 330, the determination unit 340 and the acquisition unit 350 in the terminal device 300 may be composed of Figure 6 The processor 530 in the terminal device 300 can be implemented by the first receiving unit 310 and the second receiving unit 360. Figure 6 The input interface 510 in is implemented.

[0096] like Figure 7 As shown, the embodiment of the present application also provides a transmission and receiving node 600, which can be Figure 5 The transmission and receiving node 400 in Figure 3 The content of the transmission and receiving node corresponding to the method 200 in the embodiment. The transmission and receiving node 600 includes: an input interface 610, an output interface 620, a processor 630 and a memory 640, and the input interface 610, the output interface 620, the processor 630 and the memory 640 can be connected through a bus system. The memory 640 is used to store programs, instructions or codes. The processor 630 is used to execute the programs, instructions or codes in the memory 640 to control the input interface 610 to receive signals, control the output interface 620 to send signals, and complete the operations in the aforementioned method embodiment.

[0097] Therefore, the transmission and receiving nodes of the embodiments of the present application are helpful in reducing the complexity of terminal devices detecting PDCCH.

[0098] It should be understood that in the embodiment of the present application, the processor 630 may be a central processing unit (CPU), and the processor 630 may also be other general-purpose processors, digital signal processors, application-specific integrated circuits, off-the-shelf programmable gate arrays or other programmable logic devices, discrete gate or transistor logic devices, discrete hardware components, etc. A general-purpose processor may be a microprocessor or the processor may also be any conventional processor, etc.

[0099] The memory 640 may include a read-only memory and a random access memory, and provides instructions and data to the processor 630. A portion of the memory 640 may also include a nonvolatile random access memory. For example, the memory 640 may also store information on the device type.

[0100] In the implementation process, the contents of the above method can be completed by the hardware integrated logic circuit in the processor 630 or the instructions in the form of software. The contents of the method disclosed in the embodiment of the present application can be directly embodied as a hardware processor for execution, or a combination of hardware and software modules in the processor for execution. The software module can be located in a mature storage medium in the field such as a random access memory, a flash memory, a read-only memory, a programmable read-only memory or an electrically erasable programmable memory, a register, etc. The storage medium is located in the memory 640, and the processor 630 reads the information in the memory 640 and completes the contents of the above method in combination with its hardware. To avoid repetition, it will not be described in detail here.

[0101] In a specific implementation manner, the sending unit 410 in the transmission and receiving node 400 may be composed of Figure 7 The output interface 620 in is implemented.

[0102] The embodiment of the present application also provides a computer-readable storage medium, which stores one or more programs, wherein the one or more programs include instructions, which, when executed by a portable electronic device including a plurality of application programs, enable the portable electronic device to execute Figure 2 or Figure 3 The method of the illustrated embodiment.

[0103] The present application also provides a computer program, which includes instructions. When the computer program is executed by a computer, the computer can execute Figure 2 or Figure 3 The corresponding process of the method of the embodiment shown.

[0104] Those of ordinary skill in the art will appreciate that the units and algorithm steps of each example described in conjunction with the embodiments disclosed herein can be implemented in electronic hardware, or a combination of computer software and electronic hardware. Whether these functions are performed in hardware or software depends on the specific application and design constraints of the technical solution. Professional and technical personnel can use different methods to implement the described functions for each specific application, but such implementation should not be considered to be beyond the scope of this application.

[0105] Those skilled in the art can clearly understand that, for the convenience and brevity of description, the specific working processes of the systems, devices and units described above can refer to the corresponding processes in the aforementioned method embodiments and will not be repeated here.

[0106] In the several embodiments provided in the present application, it should be understood that the disclosed systems, devices and methods can be implemented in other ways. For example, the device embodiments described above are only schematic. For example, the division of the unit is only a logical function division. There may be other division methods in actual implementation, such as multiple units or components can be combined or integrated into another system, or some features can be ignored or not executed. Another point is that the mutual coupling or direct coupling or communication connection shown or discussed can be through some interfaces, indirect coupling or communication connection of devices or units, which can be electrical, mechanical or other forms.

[0107] The units described as separate components may or may not be physically separated, and the components shown as units may or may not be physical units, that is, they may be located in one place or distributed on multiple network units. Some or all of the units may be selected according to actual needs to achieve the purpose of the solution of this embodiment.

[0108] In addition, each functional unit in each embodiment of the present application may be integrated into one processing unit, or each unit may exist physically separately, or two or more units may be integrated into one unit.

[0109] If this function is implemented in the form of a software functional unit and sold or used as an independent product, it can be stored in a computer-readable storage medium. Based on this understanding, the technical solution of the present application, or the part that contributes to the prior art or the part of the technical solution, can be embodied in the form of a software product, which is stored in a storage medium and includes several instructions for a computer device (which can be a personal computer, a server, or a network device, etc.) to execute all or part of the steps of the method in each embodiment of the present application. The aforementioned storage medium includes: U disk, mobile hard disk, read-only memory (ROM), random access memory (RAM), disk or optical disk, etc., and other media that can store program codes.

[0110] The above is only a specific implementation of the present application, but the protection scope of the present application is not limited thereto. Any person skilled in the art who is familiar with the present technical field can easily think of changes or substitutions within the technical scope disclosed in the present application, which should be included in the protection scope of the present application. Therefore, the protection scope of the present application should be based on the protection scope of the claims.

Claims

1. A wireless communication method, characterized in that: include: The terminal device receives first downlink control information in the first time domain scheduling unit; The terminal device acquires information of second downlink control information to be detected in the first time domain scheduling unit according to the first downlink control information; The first downlink control information and the second downlink control information are respectively used to schedule different data of the terminal device.

2. The method according to claim 1, characterized in that The first downlink control information carries information about the second downlink control information, and the terminal device acquires information about the second downlink control information to be detected in the first time domain scheduling unit according to the first downlink control information, including: The terminal device obtains information about the second downlink control information from the first downlink control information.

3. The method according to claim 2, characterized in that The method further comprises: The terminal device detects the second downlink control information in the first time domain scheduling unit according to information of the second downlink control information.

4. The method according to any one of claims 1 to 3, characterized in that The information of the second downlink control information includes at least one of the following information: a search space of the second downlink control information, an aggregation level of the second downlink control information, a resource location of the second downlink control information, a size of the second downlink control information, a format of the second downlink control information, beam information for receiving and / or sending the second downlink control information, and quasi-co-location information of the second downlink control information.

5. The method according to claim 1 or 2, characterized in that: The method further comprises: The terminal device determines, according to the information of the second downlink control information, the number N of the second downlink control information, where N is an integer, N≤(M-1), M is the number of downlink control information preconfigured by the network device for the terminal device, and M is a positive integer; If N is a positive integer, the terminal device learns that there are N pieces of the second downlink control information in the first time domain scheduling unit; or If N is 0, the terminal device learns that the second downlink control information does not exist in the first time domain scheduling unit.

6. The method according to claim 5, characterized in that The information of the second downlink control information is the number N of the second downlink control information or the number (N+1) of downlink control information sent by the transmission and receiving node, and the downlink control information sent by the transmission and receiving node includes the first downlink control information and the second downlink control information.

7. The method according to any one of claims 1 to 3, characterized in that The method further comprises: The terminal device receives indication information sent by a network device, where the indication information is used to instruct the terminal device to receive multiple downlink control information in the first time domain scheduling unit.

8. The method according to any one of claims 1 to 3, characterized in that The first downlink control information and the second downlink control information are sent by different transmitting and receiving nodes.

9. A wireless communication method, characterized in that: include: The first transmission and receiving node sends first downlink control information to the terminal device in the first time domain scheduling unit, where the first downlink control information carries information of second downlink control information to be detected by the terminal device in the first time domain scheduling unit, where the second downlink control information is used to indicate a downlink resource allocated for the second downlink data; The first downlink control information and the second downlink control information are respectively used to schedule different data of the terminal device.

10. The method according to claim 9, characterized in that The information of the second downlink control information includes at least one of the following information: a search space of the second downlink control information, an aggregation level of the second downlink control information, a resource location of the second downlink control information, a size of the second downlink control information, a format of the second downlink control information, beam information for receiving and / or sending the second downlink control information, and quasi-co-location information of the second downlink control information.

11. The method according to claim 9, characterized in that The information of the second downlink control information is the number N of the second downlink control information or the number (N+1) of downlink control information sent by at least one transmission and receiving node, and the at least one transmission and receiving node includes the first transmission and receiving node. N is an integer, N≤(M-1), M is the number of downlink control information preconfigured by the network device for the terminal device, and M is a positive integer.

12. The method according to any one of claims 9 to 11, characterized in that The second downlink control information is sent by the second transmitting and receiving node.

13. A terminal device, characterized in that: The terminal device comprises: A first receiving unit, configured to receive first downlink control information in a first time domain scheduling unit; an acquiring unit, configured to acquire information of second downlink control information to be detected in the first time domain scheduling unit according to the first downlink control information; The first downlink control information and the second downlink control information are respectively used to schedule different data of the terminal device.

14. The terminal device according to claim 13, characterized in that: The first downlink control information carries information of the second downlink control information, and the acquiring unit is specifically configured to: The information of the second downlink control information is acquired from the first downlink control information.

15. The terminal device according to claim 14, characterized in that: The terminal device further includes: A detection unit is used to detect the second downlink control information in the first time domain scheduling unit according to information of the second downlink control information.

16. The terminal device according to any one of claims 13 to 15, characterized in that: The information of the second downlink control information includes at least one of the following information: a search space of the second downlink control information, an aggregation level of the second downlink control information, a resource location of the second downlink control information, a size of the second downlink control information, a format of the second downlink control information, beam information for receiving and / or sending the second downlink control information, and quasi-co-location information of the second downlink control information.

17. The terminal device according to claim 13 or 14, characterized in that: The terminal device further includes: A determining unit, configured to determine, according to information of the second downlink control information, a quantity N of the second downlink control information, where N is an integer, N≤(M-1), M is a quantity of downlink control information preconfigured by the network device for the terminal device, and M is a positive integer; an acquiring unit, configured to, if N is a positive integer, contain N pieces of the second downlink control information in the first time domain scheduling unit; or If N is 0, the terminal device learns that the second downlink control information does not exist in the first time domain scheduling unit.

18. The terminal device according to claim 17 is characterized in that the information of the second downlink control information is the number N of the second downlink control information or the number (N+1) of downlink control information sent by the transmission and receiving nodes, and the downlink control information sent by the transmission and receiving nodes includes the first downlink control information and the second downlink control information.

19. The terminal device according to any one of claims 13 to 15, characterized in that: The terminal device further includes: The second receiving unit is used to receive indication information sent by a network device, where the indication information is used to instruct the terminal device to receive multiple downlink control information in the first time domain scheduling unit.

20. The terminal device according to any one of claims 13 to 15, characterized in that: The first downlink control information and the second downlink control information are sent by different transmitting and receiving nodes.

21. A transmission and receiving node, characterized in that: The transmission and receiving node is a first transmission and receiving node, and the transmission and receiving node includes: a sending unit, configured to send first downlink control information to a terminal device in a first time domain scheduling unit, wherein the first downlink control information carries information of second downlink control information to be detected by the terminal device in the first time domain scheduling unit, and the second downlink control information is used to indicate a downlink resource allocated for second downlink data; The first downlink control information and the second downlink control information are respectively used to schedule different data of the terminal device.

22. The transmission and receiving node according to claim 21, characterized in that: The information of the second downlink control information includes at least one of the following information: a search space of the second downlink control information, an aggregation level of the second downlink control information, a resource location of the second downlink control information, a size of the second downlink control information, a format of the second downlink control information, beam information for receiving and / or sending the second downlink control information, and quasi-co-location information of the second downlink control information.

23. The transmission and receiving node according to claim 21, characterized in that: The information of the second downlink control information is the number N of the second downlink control information or the number (N+1) of downlink control information sent by at least one transmission and receiving node, and the at least one transmission and receiving node includes the first transmission and receiving node. N is an integer, N≤(M-1), M is the number of downlink control information preconfigured by the network device for the terminal device, and M is a positive integer.

24. The transmission and receiving node according to any one of claims 21 to 23, characterized in that: The second downlink control information is sent by the second transmitting and receiving node.

25. A computer-readable storage medium having instructions stored thereon, which, when executed by a processor, cause the processor to perform the method for wireless communication according to any one of claims 1 to 8.

26. A computer-readable storage medium having instructions stored thereon, which, when executed by a processor, cause the processor to perform the method for wireless communication according to any one of claims 9 to 12.

27. A terminal device, comprising: processor; as well as a memory on which instructions are stored, The processor is configured to execute the instructions stored in the memory to perform the wireless communication method according to any one of claims 1 to 8.

28. A transmission and receiving node, comprising: processor; as well as a memory having instructions stored therein, The processor is configured to execute the instructions stored in the memory to perform the wireless communication method according to any one of claims 9 to 12.

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