Wireless communication method, terminal device and network device

Abstract

Provided are a wireless communication method, a terminal device and a network device. The method comprises: a terminal device detecting a PDCCH sent by a network device, wherein resources are multiplexed between the PDCCH and an SSB, the PDCCH comprises sequence indication information and a load, and the sequence indication information is used for indicating whether the load comprises downlink control information (DCI) or downlink data of the terminal device. Since resources can be multiplexed between the PDCCH and the SSB, different functions are implemented on the same resources, thereby saving transmission resources and improving the resource utilization rate of a system.

Description

Wireless communication method, terminal device and network device TECHNICAL FIELD

[0001] The present application relates to the technical field of communication, and more particularly, to a wireless communication method, a terminal device and a network device. BACKGROUND

[0002] The transmission of a physical uplink control channel (PDCCH) needs to occupy a large amount of time-frequency resources in a system, and therefore, how to improve the transmission mode of the PDCCH to improve the resource utilization of the system becomes a problem to be solved.

[0003] SUMMARY

[0004] The present application provides a wireless communication method, a terminal device and a network device. The various aspects of the present application are described below.

[0005] In a first aspect, a wireless communication method is provided, comprising: detecting, by a terminal device, a PDCCH transmitted by a network device, wherein the PDCCH comprises sequence indication information and a payload, the sequence indication information is used to indicate whether the payload comprises DCI or downlink data of the terminal device, and the payload is resource multiplexed with a synchronization signal block / physical broadcast channel block (SS / PBCH block, SSB).

[0006] In a second aspect, a wireless communication method is provided, comprising: transmitting, by a network device, a PDCCH to a terminal device, wherein the PDCCH comprises sequence indication information and a payload, the sequence indication information is used to indicate whether the payload comprises DCI or downlink data of the terminal device, and the payload is resource multiplexed with an SSB.

[0007] In a third aspect, a terminal device is provided, comprising: a transceiver unit configured to detect a PDCCH transmitted by a network device, wherein the PDCCH comprises sequence indication information and a payload, the sequence indication information is used to indicate whether the payload comprises DCI or downlink data of the terminal device, and the payload is resource multiplexed with an SSB.

[0008] In a fourth aspect, a network device is provided, comprising: a transceiver unit configured to transmit a PDCCH to a terminal device, wherein the PDCCH comprises sequence indication information and a payload, the sequence indication information is used to indicate whether the payload comprises DCI or downlink data of the terminal device, and the payload is resource multiplexed with an SSB.

[0009] In a fifth aspect, a terminal device is provided, comprising a transceiver, a memory and a processor, the memory is configured to store a program, the processor is configured to invoke the program in the memory and control the transceiver to receive or send signals, so that the terminal device performs the method according to the first aspect.

[0010] In a sixth aspect, a network device is provided, comprising a transceiver, a memory and a processor, the memory is configured to store a program, the processor is configured to invoke the program in the memory and control the transceiver to receive or send signals, so that the network device performs the method according to the second aspect.

[0011] In a seventh aspect, an apparatus is provided, comprising a processor configured to invoke a program from a memory, so that the apparatus performs the method according to any one of the first aspect or the second aspect.

[0012] In an eighth aspect, a chip is provided, comprising a processor configured to invoke a program from a memory, so that the device installed with the chip performs the method according to the first aspect or the second aspect.

[0013] In a ninth aspect, a computer readable storage medium is provided, which stores a program, the program causes a computer to perform the method according to the first aspect or the second aspect.

[0014] In a tenth aspect, a computer program product is provided, comprising a program, the program causes a computer to perform the method according to the first aspect or the second aspect.

[0015] In an eleventh aspect, a computer program is provided, the computer program causes a computer to perform the method according to the first aspect or the second aspect.

[0016] In the embodiments of the present application, the PDCCH and the SSB can be resource multiplexed, so that different functions are realized on the same resource, transmission resources are saved, and the resource utilization rate of the system is improved. BRIEF DESCRIPTION OF DRAWINGS

[0017] FIG. 1 is an example of a system architecture of a wireless communication system to which the embodiments of the present application can be applied.

[0018] FIG. 2 is a flowchart of a signal transmission in a wireless communication system to which the embodiments of the present application can be applied.

[0019] FIG. 3 is a schematic diagram of one resource configuration of a PDCCH to which the embodiments of the present application can be applied.

[0020] FIG. 4 is a schematic diagram of another resource configuration of a PDCCH to which the embodiments of the present application can be applied.

[0021] FIG. 5 is a schematic diagram of another resource configuration of PDCCH applicable to the embodiments of the present application.

[0022] FIG. 6 is a schematic diagram of a method of wireless communication provided by the embodiments of the present application.

[0023] FIG. 7 is a schematic diagram of one implementation of frequency division multiplexing between PDCCH and SSB.

[0024] FIG. 8 is a schematic diagram of another implementation of frequency division multiplexing between PDCCH and SSB.

[0025] FIG. 9 is a schematic diagram of one implementation of time division multiplexing between PDCCH and SSB.

[0026] FIG. 10 is a schematic diagram of another implementation of time division multiplexing between PDCCH and SSB.

[0027] FIG. 11 is a schematic diagram of one implementation of determining PDCCH resource location based on SSB period.

[0028] FIG. 12 is a schematic diagram of another implementation of determining PDCCH resource location based on SSB period.

[0029] FIG. 13 is a schematic diagram of another implementation of determining PDCCH resource location based on SSB period.

[0030] FIG. 14 is a schematic diagram of another implementation of determining PDCCH resource location based on SSB period.

[0031] FIG. 15 is a schematic diagram of one implementation of determining PDCCH resource location based on second information.

[0032] FIG. 16 is a schematic diagram of another implementation of determining PDCCH resource location based on second information.

[0033] FIG. 17 is a schematic diagram of another implementation of determining PDCCH resource location based on second information.

[0034] FIG. 18 is a schematic diagram of another implementation of determining PDCCH resource location based on second information.

[0035] FIG. 19 is a schematic diagram of a structure of a terminal device provided by the embodiments of the present application.

[0036] FIG. 20 is a schematic diagram of a structure of a network device provided by the embodiments of the present application.

[0037] FIG. 21 is a schematic diagram of an apparatus to which the embodiments of the present application can be applied. DETAILED DESCRIPTION

[0038] The technical solutions in the present application will be described below with reference to the drawings.

[0039] Wireless communication system

[0040] FIG. 1 is an example diagram of a system architecture of a wireless communication system 100 to which embodiments of the present application can be applied. The wireless communication system 100 can include a network device 110 and a terminal device 120. The network device 110 can be a device that communicates with the terminal device 120. The network device 110 can provide network coverage for a specific geographic area, and can communicate with the terminal device 120 located within the coverage area. The terminal device 120 can access a network, for example, a wireless network, through the network device 110. Optionally, the wireless communication system 100 can further include a network controller, a mobility management entity, and other network entities, which are not limited by embodiments of the present application.

[0041] It should be understood that the technical solutions of the embodiments of the present application can be applied to various communication systems, for example, a fifth generation (5G) system or new radio (NR), a long term evolution (LTE) system, an LTE frequency division duplex (FDD) system, an LTE time division duplex (TDD), and the like. The technical solutions provided by the present application can also be applied to future communication systems, for example, a sixth generation mobile communication system, for example, a satellite communication system, and the like.

[0042] The terminal device in the embodiments of the present application can also be referred to as a user equipment (UE), an access terminal, a user unit, a user station, a mobile station, a mobile terminal (MT), a remote station, a remote terminal, a mobile device, a user terminal, a terminal, a wireless communication device, a user agent or a user apparatus. The terminal device in the embodiments of the present application can refer to a device providing voice and / or data connectivity for a user, and can be used to connect people, things and machines, such as handheld devices with wireless connection function, vehicle-mounted devices, etc. The terminal device in the embodiments of the present application can be a mobile phone, a tablet computer (Pad), a notebook computer, a palm computer, a mobile internet device (MID), a wearable device, a virtual reality (VR) device, an augmented reality (AR) device, a wireless terminal in industrial control, a wireless terminal in self driving, a wireless terminal in remote medical surgery, a wireless terminal in smart grid, a wireless terminal in transportation safety, a wireless terminal in smart city, a wireless terminal in smart home, etc. Optionally, the terminal device can be used to act as a base station. For example, the terminal device can act as a scheduling entity, which provides sidelink signals between terminal devices in vehicle to everything (V2X) or device to device (D2D), etc. For example, a cellular phone and a car communicate with each other using sidelink signals. The cellular phone and the smart home device communicate with each other without relaying the communication signals through the base station.

[0043] The network device in the embodiments of the present application can be a device for communicating with a terminal device. The network device can be, for example, an access network device or a radio access network device. For example, the network device can be a base station. The base station can broadly cover various names in the following or replace the following names: Node B (Node B), evolved Node B (eNB), next generation Node B (gNB), relay station, access point, transmitting and receiving point (TRP), transmitting point (TP), home base station, network controller, access node, wireless node, access point (AP), transmission node, transceiver node, baseband unit (BBU), remote radio unit (RRU), active antenna unit (AAU), remote radio head (RRH), central unit (CU), distributed unit (DU), positioning node, and the like. The base station can be a macro base station, a micro base station, a relay node, a donor node, or the like, or a combination thereof.

[0044] Signal transmission process

[0045] FIG. 2 is a flowchart of signal transmission in a wireless communication system to which the embodiments of the present application are applicable. As shown in FIG. 2, the signal transmission process in the wireless communication system can be roughly divided into steps 111 to 118 shown in FIG. 2. Part or all of the signal processing processes shown in FIG. 2 can be implemented by a separate AI model.

[0046] In step 111, the transmitter channel encodes information to be transmitted to obtain a coded bitstream. The information to be transmitted can be in the form of a bitstream.

[0047] In step 112, the transmitter modulates the bitstream to obtain modulation symbols.

[0048] In step 113, the transmitter inserts pilot symbols into the modulation symbols to form a signal to be transmitted. The pilot symbols can be used by the receiver for channel estimation and symbol detection.

[0049] In step 114, the transmitter transmits the signal obtained in step 113 to the receiver via a channel. During transmission through the channel, noise is usually superimposed on the signal.

[0050] In step 115, the receiver can perform channel estimation based on the reference signal to obtain channel state information (channel state information-reference signal, CSI), and feed back the CSI to the transmitter through a feedback link, for the transmitter to adjust channel coding, modulation, precoding and the like.

[0051] In step 116, the receiver performs symbol detection on the received modulation symbols to obtain a detection result.

[0052] In step 117, the received modulation symbols are demodulated based on the detection result to obtain a code stream.

[0053] In step 118, the code stream is decoded to obtain recovered information, which can be in the form of a bit stream.

[0054] It should be understood that steps 111 to 118 shown in FIG. 2 exemplarily show common signal processing procedures in a wireless communication system, and the wireless communication system can further include resource mapping, precoding, interference cancellation, CSI measurement and the like signal processing procedures, which can be implemented by designing separate modules, and each separate module can constitute a complete wireless communication system.

[0055] PDCCH

[0056] The PDCCH can be used to transmit downlink control information (DCI), and downlink data can be transmitted through a physical downlink shared channel (PDSCH), wherein the DCI is used to schedule the transmission resource of the PDSCH.

[0057] In the NR system, the PDCCH is periodically transmitted in the time domain, and each PDCCH can carry DCI of multiple terminal devices in the cell, thereby scheduling downlink data of multiple terminal devices. This scheduling method can multiplex a large amount of terminal device scheduling information in one PDCCH for transmission, and the scheduling efficiency of the system is very high. However, this scheduling method relies on blind detection of the terminal device on the PDCCH, that is, the terminal device needs to perform blind detection on the PDCCH that may carry DCI related to itself at the time domain position configured by the network, so as to find the DCI related to itself. Even if the network device does not transmit the DCI related to the terminal device in a certain PDCCH, the terminal device still needs to periodically search for the DCI in the PDCCH. Therefore, although the DCI of all terminal devices in the cell is highly multiplexed, a large amount of unnecessary blind detection needs to be performed, which consumes a large amount of power of the terminal device.

[0058] Another PDCCH is a sequence-based PDCCH. The terminal device first detects a sequence indication information. If a sequence belonging to itself is detected, it is explicitly known that there is scheduled data after the sequence indication information, and the PDSCH located after the sequence indication information can be directly received. This method can solve the problems of complexity of the above-mentioned PDCCH blind detection and large power consumption of the terminal device.

[0059] The PDCCH involved in the embodiments of the present application can be a PDCCH based on sequence detection. As shown above, the detection of the PDCCH based on PDCCH candidate monitoring is one of the main reasons for the high power consumption of the terminal device. The terminal device receives DCI through blind detection of the PDCCH candidate, and receives the downlink data channel such as the PDSCH according to the scheduling information in the DCI. Even when the network device does not send DCI for a certain terminal device, the terminal device must periodically perform blind detection on the PDCCH, which causes high power consumption of the terminal device. The PDCCH based on sequence detection used in the embodiments can reduce the power consumption of data scheduling of the terminal device. The detection of the sequence by the terminal device is one-time detection and does not need to be performed multiple times. Compared with the decoding process of the DCI based on channel coding such as forward error correction (FEC), the power consumption of sequence detection is much lower. The terminal device only receives the content carried in the payload when it detects the sequence configured for itself, thereby reducing the frequency of starting the demodulator and the FEC decoder, and reducing the frequency of demodulating and decoding the content carried in the payload. At the same time, the payload of the PDCCH can not only carry DCI, but also carry downlink data of a smaller size. In this way, for services with small data volume, the terminal device can skip the DCI and directly receive downlink data with a lower data rate, thereby reducing the power consumption of the terminal device. Of course, the PDCCH based on sequence detection can also have other problems, such as the limited number of orthogonal sequences and the difficulty in multiplexing sequence indication information of a large number of terminal devices in the same PDCCH. The embodiments of the present application do not consider these problems at present.

[0060] Resource configuration

[0061] In the NR system, the basic unit of the PDCCH is a resource element group (REG). For example, as shown in FIG. 3, one REG occupies 1 time domain symbol in the time domain and 12 subcarriers in the frequency domain. That is, one REG is composed of “1 symbol in the time domain x 12 subcarriers in the frequency domain”. The REG includes 12 resource elements (REs), including 3 REs for transmitting a reference signal (RS) and 9 REs for transmitting a payload.

[0062] As shown in FIG. 4, 6 REGs can constitute one control channel element (CCE). Among them, (a), (b) and (c) in FIG. 4 respectively show 3 possible structures of the CCE.

[0063] In (a) of FIG. 4, for a control-resource set (CORESET) of 3 time-domain symbol lengths, 6 REGs occupy 3 time-domain symbols in the time domain and 24 subcarriers in the frequency domain, that is, include "3 rows in the time domain x 2 columns in the frequency domain".

[0064] In (b) of FIG. 4, for a CORESET of 2 time-domain symbol lengths, 6 REGs occupy 2 time-domain symbols in the time domain and 36 subcarriers in the frequency domain, that is, include "2 rows in the time domain x 3 columns in the frequency domain".

[0065] In (c) of FIG. 4, for a CORESET of 1 time-domain symbol length, 6 REGs occupy 1 time-domain symbol in the time domain and 72 subcarriers in the frequency domain, that is, include "1 row in the time domain x 6 columns in the frequency domain".

[0066] In the NR system, one PDCCH is constituted by N same CCEs arranged in the frequency domain. For example, as shown in FIG. 5, the PDCCH includes N same CCEs, for example, N = 1, 2, 4, 8 or 16. Among them, N can be referred to as the aggregation level. Generally, the larger N is set, the more the repetition number of the CCE is, and the better the transmission performance of the PDCCH is, but the more transmission resources consumed for transmitting the PDCCH are.

[0067] In the embodiments of the present application, the time-domain symbol includes but is not limited to an orthogonal frequency division multiplexing (OFDM) symbol, which can also be referred to as a symbol for short.

[0068] In the NR system, the control signal such as the PDCCH or the physical uplink control channel (PUCCH) can generally be encoded in the Polar encoding mode, and the data channel such as the PDSCH or the physical uplink shared channel (PUSCH) can be encoded in the Low Density Parity Check (LDPC) encoding mode.

[0069] Since a large amount of time-frequency resources in the system need to be occupied for transmission of the PDCCH, embodiments of the present application provide a method for wireless communication, resource multiplexing between the PDCCH and the SSB is performed, different functions are realized on the same resources, transmission resources are saved, and the resource utilization rate of the system is improved.

[0070] The embodiments of the present application will be described in detail below with reference to FIG. 6.

[0071] FIG. 6 is a flowchart of a method for wireless communication provided by an embodiment of the present application. The method 200 shown in FIG. 6 can be performed by a terminal device and a network device.

[0072] Referring to FIG. 6, in step 210, the network device sends a PDCCH to the terminal device.

[0073] Correspondingly, in step 220, the terminal device receives the PDCCH sent by the network device.

[0074] The PDCCH can be the aforementioned PDCCH based on sequence detection. The PDCCH includes sequence-based indicator and payload, and the sequence-based indicator is used to indicate whether the payload includes DCI or downlink data of the terminal device. In the embodiments of the present application, resource multiplexing is performed between the PDCCH and the SSB, or resource multiplexing is performed between the payload of the PDCCH and the SSB. Here, the resource multiplexing includes frequency domain resource multiplexing and / or time domain resource multiplexing.

[0075] In some implementations, in step 220, in the initial access process, the terminal device can receive the SSB and receive the payload of the PDCCH based on the resource position of the SSB. That is, after detecting the SSB, the terminal device can determine the resource position of the payload of the PDCCH based on the resource position of the SSB, and directly receive the payload of the PDCCH to obtain the DCI for scheduling system information included in the payload, without detecting the sequence-based indicator in the PDCCH, so that the terminal device can access the cell as soon as possible. The system information includes, for example, system information block (SIB) 1 and the like.

[0076] In some other implementations, in step 220, after the initial access, or after the terminal device has accessed the cell, the terminal device can receive the sequence indication information of the PDCCH, and determine whether to receive the load of the PDCCH based on the sequence indication information of the PDCCH. The load can include DCI used for scheduling the transmission resource of the PDSCH carrying the downlink data; or the load can also include downlink data of a smaller size to realize efficient transmission of data. That is, the PDCCH can be used for DCI scheduling downlink data of a larger size, or for transmitting downlink data of a smaller size. For example, the terminal device receives the load of the PDCCH in a case where it detects a sequence belonging to itself from the sequence indication information of the PDCCH; for another example, the terminal device determines not to receive the load of the PDCCH in a case where it does not detect a sequence belonging to itself from the sequence indication information of the PDCCH. In this way, the power consumption of the terminal device can be saved. The sequence mentioned herein can be an orthogonal sequence, for example.

[0077] It can be understood that, if not explicitly stated, the PDCCH mentioned in the embodiments of the present application can be the PDCCH received in the initial access process, or the PDCCH received after the initial access. That is, the PDCCH mentioned in the embodiments of the present application can have a dual function: in the initial access stage, the load part thereof can be used for transmitting DCI scheduling system information, and the terminal device does not need to detect the sequence indication information thereof; after the initial access, the PDCCH can be used as a PDCCH based on sequence detection, and the terminal device detects the sequence indication information therein, and determines whether to receive the load therein according to the detection result of the sequence indication information, i.e., whether to detect a sequence belonging to itself, so as to receive DCI belonging to itself or downlink data of a smaller size with lower power consumption.

[0078] In the embodiments of the present application, the detection of the PDCCH can also be referred to as monitoring the PDCCH, the detection of the sequence indication information can also be referred to as monitoring the sequence indication information, and the detection of the load can also be referred to as monitoring the load.

[0079] Since the PDCCH in the embodiments of the present application can be a PDCCH based on sequence detection, the terminal device can determine whether the PDCCH includes DCI belonging to itself based on the sequence indication information, so as to avoid unnecessary blind detection and save the power consumption of the terminal device. Moreover, since the PDCCH in the embodiments of the present application can be resource multiplexed with the SSB, the same time domain resource and / or frequency domain resource can be utilized, so as to improve the resource utilization of the system, for example, save time-frequency resources and improve the spectral efficiency of the system.

[0080] The resource multiplexing between the payload of the PDCCH and the SSB is described below in combination with FIG. 7 to FIG. 10, respectively.

[0081] Frequency division multiplexing

[0082] In some embodiments, the resource multiplexing between the payload of the PDCCH and the SSB can be frequency division multiplexing (FDM).

[0083] For example, the starting position of the frequency division multiplexing between the payload of the PDCCH and the SSB is the first time domain symbol of the payload of the PDCCH and the first time domain symbol of the SSB.

[0084] For example, in FIG. 7 and FIG. 8, it is assumed that the SSB occupies N consecutive time domain symbols, and the PDCCH occupies M consecutive symbols, where M and N are positive integers. The sequence indication information of the PDCCH is located in the first time domain symbol of the M time domain symbols, and the payload in the PDCCH is located in the remaining M-1 symbols of the M symbols. The first time domain symbol of the N time domain symbols of the SSB is the same as the first time domain symbol of the M symbols of the PDCCH, that is, the position of the first time domain symbol of the N time domain symbols is the same as the position of the first time domain symbol of the M symbols.

[0085] In some embodiments, the payload of the PDCCH and the SSB are adjacent in the frequency domain. For example, as shown in FIG. 7, the payload of the PDCCH is located on the high-frequency side of the SSB; for another example, as shown in FIG. 8, the payload of the PDCCH is located on the low-frequency side of the SSB.

[0086] Continuing to refer to FIG. 7 and FIG. 8, the sequence indication information of the PDCCH is located in the time domain symbol before the payload. In the initial access process, the terminal device first detects the SSB, and then directly receives the payload according to the resource position of the SSB and the resource multiplexing manner between the payload of the PDCCH and the SSB, without first detecting the sequence indication information. Therefore, the frequency division multiplexing between the payload of the PDCCH and the SSB is configured, for example, starting from the first time domain symbol of the payload and the first time domain symbol of the SSB, so that not only the resource can be fully multiplexed, but also the terminal device can obtain the DCI in the payload of the PDCCH as soon as possible when detecting the SSB, so as to obtain the system information of the cell, thereby improving the efficiency of accessing the cell.

[0087] After the access process, the terminal device can first detect the sequence indication information in the PDCCH, and determine whether to receive the payload in the PDCCH according to the detection result of the sequence indication information. If the sequence belonging to itself is detected, the payload can be received starting from the time domain symbol next to the sequence indication information, so as to obtain the DCI belonging to itself or the downlink data of a smaller size.

[0088] In this way, low-power PDCCH transmission in the initial access process and after the initial access can be implemented on the same time-frequency resource, so as to save time-frequency resources and improve the spectrum utilization of the system.

[0089] Time division multiplexing

[0090] In some embodiments, the PDCCH payload and the SSB can be time division multiplexed (TDM).

[0091] For example, the sequence indication information and the payload of the PDCCH are continuous in the time domain. At this time, the payload of the PDCCH is optionally located after the sequence indication information in the time domain, the sequence indication information is located after the SSB in the time domain, and the SSB, the sequence indication information, and the payload are sequentially adjacent in the time domain.

[0092] For another example, the sequence indication information and the payload of the PDCCH are discontinuous in the time domain, i.e., the sequence indication information and the payload are separately arranged in the time domain. At this time, the sequence indication information is optionally located before the SSB in the time domain, the payload is located after the SSB in the time domain, and the sequence indication information, the SSB, and the payload are sequentially adjacent in the time domain.

[0093] For example, FIG. 9 shows the case where the sequence indication information and the payload are continuous, and FIG. 10 shows the case where the sequence indication information and the payload are discontinuous. It is assumed that the SSB occupies N consecutive time domain symbols, and the PDCCH occupies M consecutive symbols, where M and N are positive integers. The sequence indication information in the PDCCH is located in the first time domain symbol of the M time domain symbols, and the payload in the PDCCH is located in the remaining M-1 symbols of the M symbols.

[0094] In the case where the sequence indication information and the payload of the PDCCH are continuous in the time domain, as shown in FIG. 9, if the position of the first time domain symbol of the SSB is symbol S, then the position of the first time domain symbol of the payload of the PDCCH is symbol S+N+2.

[0095] In the case where the sequence indication information and the payload of the PDCCH are discontinuous in the time domain, as shown in FIG. 10, if the position of the first time domain symbol of the SSB is symbol S, then the position of the time domain symbol of the sequence indication information is S-1, and the position of the first time domain symbol of the payload of the PDCCH is symbol S+N+1.

[0096] Continuing to refer to FIG. 9, the sequence indication information of the PDCCH is located in the front one time domain symbol of the payload, so there is 1 time domain symbol between the SSB and the payload of the PDCCH. That is, the 1st time domain symbol of the payload of the PDCCH is located in the N+1th time domain symbol after the 1st time domain symbol of the SSB. The sequence indication information of the PDCCH is located in the front one symbol of the time domain symbol where the payload is located, that is, the sequence indication information is located after the SSB in the time domain and occupies the time domain symbol adjacent to the SSB, or the 1st time domain symbol of the sequence indication information is located in the N time domain symbols after the 1st time domain symbol of the SSB. In the initial access process, the terminal device first detects the SSB, and then directly receives the payload according to the resource location of the SSB and the resource multiplexing manner between the payload of the PDCCH and the SSB, without first detecting the sequence indication information. After the access process, the terminal device can first detect the sequence indication information in the PDCCH, and determine whether to receive the payload in the PDCCH according to the detection result of the sequence indication information. If the sequence belonging to itself is detected, the payload can be received starting from the next time domain symbol of the sequence indication information to obtain the DCI or the smaller size of the downlink data belonging to itself.

[0097] In this way, not only can the low-power PDCCH transmission in the initial access process and after the initial access be realized on the same time-frequency resource to save the time-frequency resource and improve the spectrum utilization of the system, but also the transmission of the SSB and the PDCCH can be realized in a smaller bandwidth to reduce the complexity of the terminal device and reduce the power consumption of the terminal device.

[0098] Continuing to refer to FIG. 10, the sequence indication information of the PDCCH and the payload are separated by N symbols. Among them, the sequence indication information of the PDCCH is located in the front one time domain symbol of the 1st time domain symbol of the SSB, and the payload of the PDCCH is located adjacent to the SSB in the time domain, that is, the payload is located in the Nth time domain symbol after the 1st time domain symbol of the SSB. In the initial access process, the terminal device first detects the SSB, and then directly receives the payload according to the resource location of the SSB and the resource multiplexing manner between the payload of the PDCCH and the SSB, without first detecting the sequence indication information. After the access process, the terminal device can first detect the sequence indication information in the PDCCH, and determine whether to receive the payload in the PDCCH according to the detection result of the sequence indication information. If the sequence belonging to itself is detected, the payload can be received starting from the next time domain symbol of the SSB to obtain the DCI or the smaller size of the downlink data belonging to itself.

[0099] In this way, not only can low-power PDCCH transmission in the initial access process and after the initial access be realized on the same time-frequency resource, to save time-frequency resources and improve the spectral efficiency of the system, but also by placing the load of the PDCCH and the SSB continuously in the time domain, the terminal device can receive the load of the PDCCH as soon as possible after SSB detection, read the DCI therein for scheduling system information, obtain system information as soon as possible, and thus realize initial access more quickly.

[0100] It can be understood that in the case of time division multiplexing between the PDCCH and the SSB, the bandwidth of the PDCCH and the SSB in the frequency domain can be the same, or the bandwidth of the PDCCH and the SSB in the frequency domain can also be different. For ease of description, FIGS. 9 and 10 take the bandwidth of the PDCCH and the SSB in the frequency domain as an example, but the embodiments of the present application are not limited thereto.

[0101] The PDCCH and the SSB can be transmitted in any one of the above-mentioned frequency division multiplexing or time division multiplexing manners. In some embodiments, the method 200 can further include that the terminal device receives first information, or first indication information, sent by the network device. The first information is used to indicate the resource multiplexing manner, or resource multiplexing mode or resource multiplexing relationship, between the load and the SSB, for example, including the above-mentioned several resource multiplexing manners between the load and the SSB shown in FIGS. 7 to 10. Optionally, the first information can be carried in the physical broadcast channel (PBCH) of the SSB, for example, the master information block (MIB) in the PBCH can include the first information.

[0102] As an example, the resource multiplexing manner between the SSB and the PDCCH indicated by the first information can include several resource multiplexing manners shown in Table 1. For example, in the case where the first information includes 00, frequency division multiplexing between the PDCCH payload and the SSB is indicated, and the PDCCH payload is adjacent to the SSB in the frequency domain and is located on the low-frequency side of the SSB, which can be specifically referred to with reference to FIG. 8; for another example, in the case where the first information includes 01, frequency division multiplexing between the PDCCH payload and the SSB is indicated, and the PDCCH payload is adjacent to the SSB in the frequency domain and is located on the high-frequency side of the SSB, which can be specifically referred to with reference to FIG. 7; for another example, in the case where the first information includes 10, time division multiplexing between the PDCCH payload and the SSB is indicated, and the sequence indication information of the PDCCH payload is continuous with the payload in the time domain, that is, the sequence indication information is located after the SSB and is adjacent to the SSB in the time domain, which can be specifically referred to with reference to FIG. 9; for another example, in the case where the first information includes 11, time division multiplexing between the PDCCH payload and the SSB is indicated, and the sequence indication information of the PDCCH payload is discontinuous with the payload in the time domain, that is, the sequence indication information is located before the SSB in the time domain, the payload is located after the SSB in the time domain, and the sequence indication information, the SSB and the payload are adjacent in the time domain, which can be specifically referred to with reference to FIG. 10.

[0103] Table 1

[0104] How the PDCCH payload and the SSB are multiplexed in resources is described above in combination with FIGS. 7 to 10. In the following, how the PDCCH is distributed in the time domain is described in combination with FIGS. 11 to 18.

[0105] As shown above, in the initial access process, the terminal device accesses the cell based on the PDCCH multiplexed with the SSB in resources, and after accessing the cell, receives the downlink data sent by the network device based on the PDCCH. How the PDCCH is distributed in the time domain in the embodiments of the present application can be determined based on the following two manners.

[0106] Determining the time domain distribution of the PDCCH based on the SSB period

[0107] In some embodiments, the period of the PDCCH can be determined based on the period of the SSB. In this case, the period of the PDCCH and the period of the SSB need to have an integer multiple relationship, for example, the period of the PDCCH can be equal to the period of the SSB. In this way, the time domain distribution of the PDCCH can be determined without increasing additional signaling overhead.

[0108] For example, as shown in FIG. 11, the payload of the PDCCH is frequency-division multiplexed with the SSB, and the payload of the PDCCH is adjacent to the SSB in the frequency domain and located on the high-frequency side of the SSB. The specific details of the resource location relationship between the PDCCH and the SSB can refer to the foregoing FIG. 7. Assuming that the period of the PDCCH is the same as the period of the SSB, the terminal device can determine the period of the PDCCH based on the period of the SSB, and then determine the distribution of the PDCCH in the time domain. In the initial access process, the terminal device first detects the SSB, and then directly receives the payload according to the resource location of the SSB and the resource multiplexing manner between the payload of the PDCCH and the SSB, without first detecting the sequence indication information. After the initial access, the terminal device can not detect the SSB, but determine the period of the PDCCH according to the period of the SSB, so as to detect the sequence indication information of the PDCCH based on the period, and determine whether to receive the payload in the PDCCH according to the detection result of the sequence indication information. If the sequence belonging to itself is detected, the payload can be received starting from the next time domain symbol of the sequence indication information, so as to obtain the DCI or the downlink data of a smaller size belonging to itself.

[0109] For example, as shown in FIG. 11, the payload of the PDCCH is frequency-division multiplexed with the SSB, and the payload of the PDCCH is adjacent to the SSB in the frequency domain and located on the high-frequency side of the SSB. The specific details of the resource location relationship between the PDCCH and the SSB can refer to the foregoing FIG. 7. Assuming that the period of the PDCCH is the same as the period of the SSB, the terminal device can determine the period of the PDCCH based on the period of the SSB, and then determine the distribution of the PDCCH in the time domain. In the initial access process, the terminal device first detects the SSB, and then directly receives the payload according to the resource location of the SSB and the resource multiplexing manner between the payload of the PDCCH and the SSB, without first detecting the sequence indication information. After the initial access, the terminal device can not detect the SSB, but determine the period of the PDCCH according to the period of the SSB, so as to detect the sequence indication information of the PDCCH based on the period, and determine whether to receive the payload in the PDCCH according to the detection result of the sequence indication information. If the sequence belonging to itself is detected, the payload can be received starting from the next time domain symbol of the sequence indication information, so as to obtain the DCI or the downlink data of a smaller size belonging to itself.

[0110] For example, as shown in FIG. 13, the load of the PDCCH is time-division multiplexed with the SSB, the sequence indication information of the PDCCH is continuous with the load in the time domain, and the SSB, the sequence indication information, and the load are sequentially adjacent in the time domain. The specific details of the resource position relationship between the PDCCH and the SSB can be referred to the foregoing FIG. 9. Assuming that the period of the PDCCH is the same as the period of the SSB, the terminal device can determine the period of the PDCCH based on the period of the SSB, and further determine the distribution of the PDCCH in the time domain. In the initial access process, the terminal device first detects the SSB, and then directly receives the load according to the resource position of the SSB and the resource multiplexing manner between the load of the PDCCH and the SSB, without detecting the sequence indication information first. After the initial access, the terminal device can not detect the SSB, but determine the period of the PDCCH according to the period of the SSB, so as to detect the sequence indication information of the PDCCH based on the period, and determine whether to receive the load in the PDCCH according to the detection result of the sequence indication information. If the sequence belonging to the terminal device is detected, the load can be received starting from the next time domain symbol of the sequence indication information, so as to obtain the DCI or the small-size downlink data belonging to the terminal device.

[0111] For example, as shown in FIG. 13, the load of the PDCCH is time-division multiplexed with the SSB, the sequence indication information of the PDCCH is continuous with the load in the time domain, and the SSB, the sequence indication information, and the load are sequentially adjacent in the time domain. The specific details of the resource position relationship between the PDCCH and the SSB can be referred to the foregoing FIG. 9. Assuming that the period of the PDCCH is the same as the period of the SSB, the terminal device can determine the period of the PDCCH based on the period of the SSB, and further determine the distribution of the PDCCH in the time domain. In the initial access process, the terminal device first detects the SSB, and then directly receives the load according to the resource position of the SSB and the resource multiplexing manner between the load of the PDCCH and the SSB, without detecting the sequence indication information first. After the initial access, the terminal device can not detect the SSB, but determine the period of the PDCCH according to the period of the SSB, so as to detect the sequence indication information of the PDCCH based on the period, and determine whether to receive the load in the PDCCH according to the detection result of the sequence indication information. If the sequence belonging to the terminal device is detected, the load can be received starting from the next time domain symbol of the sequence indication information, so as to obtain the DCI or the small-size downlink data belonging to the terminal device.

[0112] In FIGS. 11 to 14, the load part of the PDCCH is a dashed box, indicating that there is no DCI or small-size downlink data belonging to the terminal device in the load; the load part of the PDCCH is a solid box, indicating that there is DCI or small-size downlink data belonging to the terminal device in the load.

[0113] In addition, in FIGS. 11-14, the location of the SSB is a dashed box, indicating that the SSB is transmitted at this location, but the terminal device does not use the SSB at this location for initial access, because the terminal device has accessed the cell based on the previous SSB, but the SSB at this location can still exist and be used for initial access of other terminal devices; the location of the SSB is a solid box, indicating that the SSB transmitted at this location is used for initial access of the terminal device.

[0114] determining the time domain distribution of the PDCCH based on the second information

[0115] In some embodiments, the method 200 can further include that the terminal device receives second information, or second indication information, transmitted by the network device. The second information is used to indicate the resource location of the PDCCH. That is, the terminal device can determine the time domain distribution of the PDCCH through the second information transmitted by the network device.

[0116] The second information can be general information, or the second information is dedicated information. For example, the second information can be associated with a bandwidth part (BWP), that is, the second information is dedicated information configured for a certain BWP; for another example, the second information can be associated with a carrier, that is, the second information is dedicated information configured for a certain carrier.

[0117] In some embodiments, the second information can include one or more of the following: the periodicity of the PDCCH; the time domain location of the PDCCH in the periodicity; the time domain length of the PDCCH; the format information of the DCI carried in the PDCCH, or the format information of the DCI that can be detected in the PDCCH.

[0118] In some embodiments, the time domain location of the PDCCH in the periodicity includes a slot level location and / or a symbol level location.

[0119] The periodicity of the PDCCH described in the embodiments of the present application includes but is not limited to a slot level periodicity, that is, a periodicity in units of slots. The time domain location of the PDCCH in the periodicity can include a slot level location, for example, which can be used to indicate the offset between the target slot in the periodicity and the first slot in the periodicity, and the target slot is the slot in the periodicity where the PDCCH is located. As an example, the periodicity of the PDCCH includes 5 slots, and the PDCCH is located in the 3rd slot, then the slot level location can indicate the 3rd slot. Since the terminal device has completed time synchronization and obtained the corresponding slot number after initial access, the terminal device can be notified of the slot position of the PDCCH in each periodicity through the second information indicating the corresponding slot number.

[0120] The time domain position of the PDCCH in the period can also include a symbol level position, for example, a starting time domain symbol of the PDCCH in the target slot can be used to indicate the symbol number. As an example, the period of the PDCCH includes 5 slots, the PDCCH is located in the 3rd slot, and the starting symbol of the PDCCH is the 1st time domain symbol in the 3rd slot, then the symbol level position of the PDCCH can include the symbol number of the 1st time domain symbol in the 3rd slot of each period.

[0121] The information indicating the time-frequency resource of the PDCCH by the second information can be applied to the case where the period of the PDCCH is the same as or different from the period of the SSB, and has greater flexibility.

[0122] For example, as shown in FIG. 15, the PDCCH load is frequency division multiplexed with the SSB, and the PDCCH load is adjacent to the SSB in the frequency domain and located on the high frequency side of the SSB. The specific details of the resource position relationship between the PDCCH and the SSB can be referred to the foregoing FIG. 7. In the initial access process, the terminal device first detects the SSB, and then directly receives the load according to the resource position of the SSB and the resource multiplexing mode between the PDCCH load and the SSB, without first detecting the sequence indication information. After the initial access, the terminal device determines the resource position of the subsequent PDCCH based on the time domain position of the PDCCH frequency division multiplexed with the SSB used for its initial access, and the resource position of the PDCCH indicated by the second information. For example, the second information indicates the period of the PDCCH, and the terminal device can find the time domain position of the next PDCCH load after one period of the time domain position of the PDCCH load frequency division multiplexed with the SSB, and find the corresponding sequence indication information at the previous time domain position of the load; for another example, the second information indicates the period of the PDCCH, and the terminal device finds the time domain position of the sequence indication information of the next PDCCH after one period of the time domain position of the sequence indication information before the PDCCH load frequency division multiplexed with the SSB. After determining the resource position of the PDCCH, the terminal device detects the sequence indication information of the PDCCH at the corresponding position, and determines whether to receive the load in the PDCCH according to the detection result of the sequence indication information, if the sequence belonging to itself is detected, the load can be received starting from the next time domain symbol of the sequence indication information, to obtain the DCI or smaller size downlink data belonging to itself.

[0123] For another example, as shown in FIG. 16, the load of the PDCCH is frequency-division multiplexed with the SSB, and the load of the PDCCH is adjacent to the SSB in the frequency domain and located at the low-frequency side of the SSB. The specific details of the resource location relationship between the PDCCH and the SSB can refer to the foregoing FIG. 8. In the initial access process, the terminal device first detects the SSB, and then directly receives the load according to the resource location of the SSB and the resource multiplexing manner between the load of the PDCCH and the SSB, without the need to detect the sequence indication information first. After the initial access, the terminal device determines the resource location of the subsequent PDCCH based on the time domain location of the PDCCH frequency-division multiplexed with the SSB used for the initial access of the terminal device and the resource location of the PDCCH indicated by the second information. For example, the second information indicates the period of the PDCCH, and the terminal device can find the time domain location of the load of the next PDCCH at a time domain location one period after the time domain location of the load of the PDCCH frequency-division multiplexed with the SSB, and find the corresponding sequence indication information at the previous time domain location of the load; for another example, the second information indicates the period of the PDCCH, and the terminal device finds the time domain location of the sequence indication information of the next PDCCH at a time domain location one period after the time domain location of the sequence indication information located before the load of the PDCCH frequency-division multiplexed with the SSB. After determining the resource location of the PDCCH, the terminal device detects the sequence indication information of the PDCCH at the corresponding location, and determines whether to receive the load in the PDCCH according to the detection result of the sequence indication information. If the sequence belonging to the terminal device is detected, the terminal device can start receiving the load at the next time domain symbol of the sequence indication information to obtain the DCI or the smaller size of the downlink data belonging to the terminal device.

[0124] For another example, as shown in FIG. 17, the PDCCH and the SSB are time-division multiplexed, the sequence indication information and the payload of the PDCCH are continuous in the time domain, and the SSB, the sequence indication information and the payload are sequentially adjacent in the time domain. The specific details of the resource location relationship between the PDCCH and the SSB can refer to the foregoing FIG. 9. In the initial access process, the terminal device first detects the SSB, and then directly receives the payload according to the resource location of the SSB and the resource multiplexing manner between the payload of the PDCCH and the SSB, without detecting the sequence indication information first. After the initial access, the terminal device determines the resource location of the subsequent PDCCH based on the time domain location of the PDCCH time-division multiplexed with the SSB used for the initial access of the terminal device and the resource location of the PDCCH indicated by the second information. For example, the second information indicates the period of the PDCCH, and the terminal device can find the time domain location of the payload of the next PDCCH at a time domain location one period after the time domain location of the payload of the PDCCH time-division multiplexed with the SSB, and find the corresponding sequence indication information at N+1 time domain locations before the payload. For another example, the second information indicates the period of the PDCCH, and the terminal device can find the time domain location of the sequence indication information of the next PDCCH at a time domain location one period after the time domain location of the sequence indication information before the payload of the PDCCH time-division multiplexed with the SSB. After determining the resource location of the PDCCH, the terminal device detects the sequence indication information of the PDCCH at the corresponding location, and determines whether to receive the payload in the PDCCH according to the detection result of the sequence indication information. If the sequence belonging to the terminal device is detected, the terminal device can start receiving the payload at the next time domain symbol of the sequence indication information to obtain the DCI or the downlink data of a smaller size belonging to the terminal device.

[0125] For example, as shown in FIG. 18, the PDCCH and the SSB are time-division multiplexed, the sequence indication information and the load of the PDCCH are discontinuous in the time domain, and the sequence indication information, the SSB, and the load are sequentially adjacent in the time domain. The specific details of the resource location relationship between the PDCCH and the SSB can be referred to the foregoing FIG. 10. In the initial access process, the terminal device first detects the SSB, and then directly receives the load according to the resource location of the SSB and the resource multiplexing manner between the load and the SSB of the PDCCH, without detecting the sequence indication information first. After the initial access, the terminal device determines the resource location of the subsequent PDCCH based on the time domain location of the PDCCH time-division multiplexed with the SSB used for the initial access of the terminal device and the resource location of the PDCCH indicated by the second information. For example, the second information indicates the period of the PDCCH, and the terminal device can find the time domain location of the load of the next PDCCH at a time domain location one period after the time domain location of the load of the PDCCH time-division multiplexed with the SSB, and find the corresponding sequence indication information at N+1 time domain locations before the load. For another example, the second information indicates the period of the PDCCH, and the terminal device can find the time domain location of the sequence indication information of the next PDCCH at a time domain location one period after the time domain location of the sequence indication information before the load of the PDCCH time-division multiplexed with the SSB. After determining the resource location of the PDCCH, the terminal device detects the sequence indication information of the PDCCH at the corresponding location, and determines whether to receive the load in the PDCCH according to the detection result of the sequence indication information. If the sequence belongs to the terminal device, the terminal device can start receiving the load at the next time domain symbol of the sequence indication information to obtain the DCI or the downlink data of a smaller size that belongs to the terminal device.

[0126] In FIG. 18, the location relationship between the load and the sequence indication information in the PDCCH after the initial access and the location relationship between the load and the sequence indication information in the PDCCH resource multiplexed with the SSB remain the same, that is, the load and the sequence indication information are separated by N time domain symbols, that is, the time domain length occupied by one SSB, in the PDCCH in the initial access process and after the initial access. Such a design can make the PDCCH uniform and reduce the complexity of PDCCH detection, and the time domain symbols separated between the load and the sequence indication information in the PDCCH after the initial access can also be used to transmit other signaling or SSBs required by other terminal devices, to further improve the utilization rate of resources. Of course, the present application does not exclude that the location relationship between the load and the sequence indication information in the PDCCH after the initial access is designed to be different from the location relationship between the load and the sequence indication information in the PDCCH in the initial access process, for example, the load in the PDCCH after the initial access can be adjacent to the sequence indication information in the time domain.

[0127] It can be understood that the examples in FIGS. 15 to 18 only indicate the period of the PDCCH by the second information, and the terminal device determines the time domain position of the PDCCH according to the period indicated by the second information. The second information can further indicate the time slot level position and / or the symbol level position and the like in the period, and the terminal device determines the time domain position of the PDCCH according to the above contents indicated by the second information.

[0128] In the foregoing, the method embodiments of the present application are described in detail with reference to FIGS. 6 to 18, and in the following, the device embodiments of the present application are described in detail with reference to FIGS. 19 to 21. It should be understood that the description of the method embodiments and the description of the device embodiments correspond to each other, and therefore, the parts not described in detail can be referred to the foregoing method embodiments.

[0129] FIG. 19 is a structural schematic diagram of a terminal device provided by an embodiment of the present application. The terminal device 300 shown in FIG. 19 can include a transceiver unit 310. The transceiver unit 310 is configured to detect a PDCCH transmitted by a network device, wherein the PDCCH includes sequence indication information and a payload, the sequence indication information is used to indicate whether the payload includes DCI or downlink data of the terminal device, and the payload is resource multiplexed with an SSB.

[0130] In some implementations, the payload is frequency division multiplexed with the SSB.

[0131] In some implementations, a starting position of the frequency division multiplexing between the payload and the SSB is a first time domain symbol of the payload of the PDCCH and a first time domain symbol of the SSB.

[0132] In some implementations, the payload and the SSB are adjacent in the frequency domain.

[0133] In some implementations, the payload is located on a low frequency side of the SSB in the frequency domain, or the payload is located on a high frequency side of the SSB in the frequency domain.

[0134] In some implementations, the payload is time division multiplexed with the SSB.

[0135] In some implementations, the sequence indication information and the payload are continuous in the time domain, wherein the payload is located after the sequence indication information in the time domain, the sequence indication information is located after the SSB in the time domain, and the SSB, the sequence indication information and the payload are sequentially adjacent in the time domain.

[0136] In some embodiments, the sequence indication information is located before the SSB in time domain, the payload is located after the SSB in time domain, and the sequence indication information, the SSB and the payload are sequentially adjacent in time domain.

[0137] In some embodiments, the payload has the same or different bandwidth in frequency domain as the SSB.

[0138] In some embodiments, the transceiver 310 is further configured to receive first information sent by the network device, the first information being used to indicate a resource multiplexing manner between the SSB and the payload.

[0139] In some embodiments, the first information is carried in a PBCH of the SSB.

[0140] In some embodiments, a period of the PDCCH has an integer multiple relationship with a period of the SSB, and the period of the PDCCH is determined based on the period of the SSB.

[0141] In some embodiments, the transceiver 310 is further configured to receive second information sent by the network device, the second information being used to indicate a resource location of the PDCCH.

[0142] In some embodiments, the second information includes one or more of the following: a period of the PDCCH; a time domain location of the PDCCH in the period; a time domain length of the PDCCH; information of a format of DCI carried in the PDCCH.

[0143] In some embodiments, the time domain location of the PDCCH in the period includes one or more of the following: a slot level location, used to indicate an offset between a target slot and a first slot in the period, the target slot being a slot in which the PDCCH is located in the period; a symbol level location, used to indicate a symbol number of a starting time domain symbol of the PDCCH in the target slot.

[0144] In some embodiments, the second information is associated with one or more of the following: a BWP; a carrier.

[0145] In some embodiments, the transceiver 310 is specifically configured to: in an initial access process, receive the SSB, and based on a resource location of the SSB, receive a payload of the PDCCH; or after the initial access, receive sequence indication information of the PDCCH, and based on the sequence indication information of the PDCCH, determine whether to receive a payload of the PDCCH.

[0146] In some embodiments, the transceiver 310 is specifically configured to: receive the payload of the PDCCH in a case where a sequence belonging to the terminal device is detected from the sequence indication information of the PDCCH; or determine not to receive the payload of the PDCCH in a case where no sequence belonging to the terminal device is detected from the sequence indication information of the PDCCH.

[0147] It can be understood that the transceiver 310 may, for example, be the transceiver 530. In addition, the terminal device 300 optionally further includes a processor 510 and a memory 520, as shown in FIG. 21.

[0148] FIG. 20 is a structural schematic diagram of a network device provided by an embodiment of the present application. The network device 400 shown in FIG. 20 can include a transceiver 410. The transceiver 410 is configured to send a PDCCH to a terminal device, wherein the PDCCH includes sequence indication information and a payload, the sequence indication information is used to indicate whether the payload includes DCI or downlink data of the terminal device, and the payload is resource multiplexed with an SSB.

[0149] In some embodiments, the payload is frequency division multiplexed with the SSB.

[0150] In some embodiments, a starting position of the frequency division multiplexing between the payload and the SSB is a first time domain symbol of the payload of the PDCCH and a first time domain symbol of the SSB.

[0151] In some embodiments, the payload and the SSB are adjacent in the frequency domain.

[0152] In some embodiments, the payload is located on a low-frequency side of the SSB in the frequency domain, or the payload is located on a high-frequency side of the SSB in the frequency domain.

[0153] In some embodiments, the payload is time division multiplexed with the SSB.

[0154] In some embodiments, the sequence indication information and the payload are continuous in the time domain, wherein the payload is located after the sequence indication information in the time domain, the sequence indication information is located after the SSB in the time domain, and the SSB, the sequence indication information, and the payload are sequentially adjacent in the time domain.

[0155] In some embodiments, the sequence indication information and the payload are discontinuous in the time domain, wherein the sequence indication information is located before the SSB in the time domain, the payload is located after the SSB in the time domain, and the sequence indication information, the SSB, and the payload are sequentially adjacent in the time domain.

[0156] In some embodiments, the load is the same as or different from a bandwidth of the SSB in a frequency domain.

[0157] In some embodiments, the transceiver 410 is further configured to send, to the terminal device, first information, the first information being used to indicate a resource multiplexing manner between the SSB and the load.

[0158] In some embodiments, the first information is carried in a PBCH of the SSB.

[0159] In some embodiments, a period of the PDCCH has an integer multiple relationship with a period of the SSB, and the period of the PDCCH is determined based on the period of the SSB.

[0160] In some embodiments, the transceiver 410 is further configured to send, to the terminal device, second information, the second information being used to indicate a resource location of the PDCCH.

[0161] In some embodiments, the second information includes one or more of the following: a period of the PDCCH; a time domain location of the PDCCH in the period; a time domain length of the PDCCH; information of a format of DCI carried in the PDCCH.

[0162] In some embodiments, the time domain location of the PDCCH in the period includes one or more of the following: a slot level location, used to indicate an offset between a target slot and a first slot in the period, the target slot being a slot in which the PDCCH is located in the period; a symbol level location, used to indicate a symbol number of a starting time domain symbol of the PDCCH in the target slot.

[0163] In some embodiments, the second information is associated with one or more of the following: a BWP; a carrier.

[0164] It can be understood that the transceiver 410 may, for example, be the transceiver 530. In addition, the network device 400 optionally further includes a processor 510 and a memory 520, as shown in FIG. 21.

[0165] FIG. 21 is a schematic structural diagram of a communication apparatus to which embodiments of the present application can be applied. The dashed line in FIG. 21 indicates that the unit or module is optional. The apparatus 500 can be used to implement the method 200 described in the above method embodiment. The apparatus 500 can be a chip, a terminal device or a network device.

[0166] The apparatus 500 can include one or more processors 510. The processor 510 can support the apparatus 500 to implement the method described in the foregoing method embodiments. The processor 510 can be a general purpose processor or a special purpose processor. For example, the processor can be a central processing unit (CPU). Alternatively, the processor can also be other general purpose processors, digital signal processors (DSP), application specific integrated circuits (ASIC), field programmable gate arrays (FPGA) or other programmable logic devices, discrete gates or transistor logic, discrete hardware components, etc. The general purpose processor can be a microprocessor or the processor can also be any conventional processor.

[0167] The apparatus 500 can also include one or more memories 520. The memory 520 stores a program that can be executed by the processor 510, so that the processor 510 executes the method 200 described in the foregoing method embodiments. The memory 520 can be independent of the processor 510 or integrated in the processor 510.

[0168] The apparatus 500 can also include a transceiver 530. The processor 510 can communicate with other devices or chips through the transceiver 530. For example, the processor 510 can perform data transceiving with other devices or chips through the transceiver 530.

[0169] The embodiments of the present application also provide a communication system. The system includes the terminal device and the network device described above. In some implementations, the system further includes other devices that interact with the terminal device and the network device.

[0170] The embodiments of the present application also provide a computer readable storage medium for storing a program. The computer readable storage medium can be applied to the terminal device or the network device provided by the embodiments of the present application, and the program causes the computer to execute the method 200 performed by the terminal device or the network device in the various embodiments of the present application.

[0171] The embodiments of the present application also provide a computer program product. The computer program product includes a program. The computer program product can be applied to the terminal device or the network device provided by the embodiments of the present application, and the program causes the computer to execute the method 200 performed by the terminal device or the network device in the various embodiments of the present application.

[0172] The embodiments of the present application further provide a computer program. The computer program can be applied to the terminal device or the network device provided by the embodiments of the present application, and the computer program enables a computer to execute the method 200 performed by the terminal device or the network device in the embodiments of the present application.

[0173] It should be understood that the terms "system" and "network" can be used interchangeably in the present application. In addition, the terms used in the present application are only used to explain the specific embodiments of the present application, and are not intended to limit the present application. The terms "first", "second", "third", and "fourth" and the like in the specification and claims of the present application and the drawings are used to distinguish different objects, and are not used to describe a particular order. In addition, the terms "include" and "have" and any variations thereof are intended to cover non-exclusive inclusion.

[0174] In the embodiments of the present application, the "indication" mentioned can be direct indication, or indirect indication, or can be an indication of an associated relationship. For example, A indicates B, which can mean that B can be obtained by A; or A indirectly indicates B, for example, A indicates C, and B can be obtained by C; or A and B have an associated relationship.

[0175] In the embodiments of the present application, "B corresponding to A" means that B is associated with A, and B can be determined according to A. However, it should also be understood that determining B according to A does not mean that B is determined only according to A, but B can also be determined according to A and / or other information.

[0176] In the embodiments of the present application, the term "corresponding" can mean that there is a direct or indirect corresponding relationship between the two, or can mean that there is an associated relationship between the two, or can mean an indication and being indicated, configuration and being configured, and the like.

[0177] In the embodiments of the present application, "predefined" or "preconfigured" can be implemented by pre-saving corresponding codes, tables or other information that can be used to indicate related information in devices (for example, including terminal devices and network devices), and the present application does not limit the specific implementation manner. For example, predefinition can mean definition in a protocol.

[0178] In the embodiments of the present application, the "protocol" can refer to a standard protocol in the communication field, for example, can include an LTE protocol, an NR protocol, and a related protocol applied to a future communication system, and the present application does not limit this.

[0179] The term "and / or" used in the embodiments of the present application only describes an association relationship of associated objects, which means that there can be three relationships, for example, A and / or B can represent the following three cases: A exists alone, A and B exist together, and B exists alone. In addition, the character " / " in this document generally represents an "or" relationship between the front and rear associated objects.

[0180] In various embodiments of the present application, the size of the sequence number of each process described above does not mean the order of execution, and the execution order of each process should be determined according to its function and inherent logic, and should not constitute any limitation on the implementation process of the embodiments of the present application.

[0181] In several embodiments provided by the present application, it should be understood that the disclosed system, device and method can be implemented by other ways. For example, the device embodiments described above are only schematic, and the division of the units is only a logical function division, and there can be another division way in actual implementation, for example, a plurality of units or components can be combined or integrated into another system, or some features can be ignored or not executed. In addition, the coupling or direct coupling or communication connection between the units shown or discussed can be indirect coupling or communication connection through some interface, device or unit, and can be electrical, mechanical or other forms.

[0182] The units described as separate components can or can not be physically separate, and the components shown as units can or can not be physical units, that is, they can be located in one place, or can be distributed on a plurality of network units. According to actual needs, part or all of the units can be selected to achieve the purpose of the embodiments of the present application.

[0183] In addition, each functional unit in each embodiment of the present application can be integrated into a processing unit, or each unit can exist physically independently, or two or more units can be integrated into one unit.

[0184] In the above embodiments, all or part of the embodiments can be implemented by software, hardware, firmware or any combination thereof. When implemented by software, all or part of the embodiments can be implemented in the form of a computer program product. The computer program product includes one or more computer instructions. When the computer program instructions are loaded and executed on a computer, all or part of the processes or functions described in the embodiments of the present application are generated. The computer can be a general purpose computer, a special purpose computer, a computer network, or other programmable devices. The computer instructions can be stored in a computer readable storage medium or transmitted from one computer readable storage medium to another computer readable storage medium, for example, the computer instructions can be transmitted from one website, computer, server or data center to another website, computer, server or data center through wired (such as coaxial cable, optical fiber, digital subscriber line (DSL)) or wireless (such as infrared, wireless, microwave, etc.) mode. The computer readable storage medium can be any available medium that can be read by a computer or a data storage device such as a server, data center and the like integrated with one or more available media sets. The available media can be magnetic media (such as floppy disk, hard disk, magnetic tape), optical media (such as digital video disc (DVD)) or semiconductor media (such as solid state disk (SSD)) and the like.

[0185] 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 can easily think of changes or replacements within the technical range disclosed in the present application, which should be covered within the protection scope of the present application. Therefore, the protection scope of the present application should be subject to the protection scope of the claims.

Claims

1. A method of wireless communication, comprising: The method comprises: A terminal device detects a physical downlink control channel (PDCCH) sent by a network device, wherein the PDCCH comprises sequence indication information and a payload, the sequence indication information is used to indicate whether the payload comprises downlink control information (DCI) or downlink data of the terminal device, and the payload is resource multiplexed with a synchronization signal broadcast channel (SSB).

2. The method of claim 1, wherein, The payload is frequency division multiplexed with the SSB.

3. The method of claim 2, wherein, A starting position of the frequency division multiplexing between the payload and the SSB is a first time domain symbol of the payload and a first time domain symbol of the SSB.

4. The method according to claim 2 or 3, characterized in that, The payload and the SSB are adjacent in the frequency domain.

5. The method of claim 4, wherein: The payload is located on a low frequency side of the SSB in the frequency domain; or The payload is located on a high frequency side of the SSB in the frequency domain.

6. The method of claim 1, wherein, The payload is time division multiplexed with the SSB.

7. The method of claim 6, wherein, The sequence indication information is continuous with the payload in the time domain, wherein the payload is located after the sequence indication information in the time domain, the sequence indication information is located after the SSB in the time domain, and the SSB, the sequence indication information, and the payload are sequentially adjacent in the time domain.

8. The method of claim 6, wherein, The sequence indication information is discontinuous with the payload in the time domain, wherein the sequence indication information is located before the SSB in the time domain, the payload is located after the SSB in the time domain, and the sequence indication information, the SSB, and the payload are sequentially adjacent in the time domain.

9. The method according to any one of claims 6 to 8, characterized in that, The bandwidth of the payload in the frequency domain is the same as or different from that of the SSB.

10. The method according to any one of claims 1 to 9, characterized in that, The method further comprises: The terminal device receives first information sent by the network device, and the first information is used to indicate a resource multiplexing manner between the SSB and the payload.

11. The method of claim 10, wherein, The first information is carried in a physical broadcast channel (PBCH) of the SSB.

12. The method according to any one of claims 1 to 11, characterized in that, The period of the PDCCH has an integer multiple relationship with the period of the SSB, and the period of the PDCCH is determined based on the period of the SSB.

13. The method according to any one of claims 1 to 12, characterized in that, The method further comprises: The terminal device receives second information sent by the network device, and the second information is used to indicate a resource position of the PDCCH.

14. The method of claim 13, wherein, The second information comprises one or more of the following: The period of the PDCCH; The time domain position of the PDCCH in the period; The time domain length of the PDCCH; Information of a format of DCI carried in the PDCCH.

15. The method of claim 14, wherein, The time domain position of the PDCCH in the period comprises one or more of the following: A slot level position, used to indicate an offset between a target slot and a first slot in the period, the target slot being a slot in which the PDCCH is located in the period; A symbol level position, used to indicate a symbol number of a starting time domain symbol of the PDCCH in the target slot.

16. The method according to any one of claims 13 to 15, characterized in that, The second information is associated with one or more of the following: a bandwidth part (BWP); a carrier.

17. The method of any one of claims 1 to 16, wherein, The terminal device detects a PDCCH sent by a network device, comprising: In the initial access process, the terminal device receives the SSB, and receives the load of the PDCCH based on the resource position of the SSB; or After the initial access, the terminal device receives sequence indication information of the PDCCH, and determines whether to receive the load of the PDCCH based on the sequence indication information of the PDCCH.

18. The method of claim 17, wherein, The determination whether to receive the load of the PDCCH based on the sequence indication information comprises: In a case where the terminal device detects a sequence belonging to the terminal device from the sequence indication information of the PDCCH, the terminal device receives the load of the PDCCH; or In a case where the terminal device does not detect a sequence belonging to the terminal device from the sequence indication information of the PDCCH, the terminal device determines not to receive the load of the PDCCH.

19. A method of wireless communication, comprising: Comprise: A network device sends a physical downlink control channel (PDCCH) to a terminal device, wherein the PDCCH comprises sequence indication information and a load, the sequence indication information is used to indicate whether the load comprises downlink control information (DCI) or downlink data of the terminal device, and the load is resource multiplexed with a synchronization signal block (SSB).

20. The method of claim 19, wherein, The load is frequency division multiplexed with the SSB.

21. The method of claim 20, wherein, The starting position of the frequency division multiplexing between the load and the SSB is the first time domain symbol of the load and the first time domain symbol of the SSB.

22. The method of claim 20 or 21, wherein, The load and the SSB are adjacent in the frequency domain.

23. The method of claim 22, wherein The load is located on the low frequency side of the SSB in the frequency domain; or The load is located on the high frequency side of the SSB in the frequency domain.

24. The method of claim 19, wherein, The load is time division multiplexed with the SSB.

25. The method of claim 24, wherein, The sequence indication information and the load are continuous in the time domain, wherein the load is located after the sequence indication information in the time domain, the sequence indication information is located after the SSB in the time domain, and the SSB, the sequence indication information, and the load are sequentially adjacent in the time domain.

26. The method of claim 24, wherein, The sequence indication information and the load are discontinuous in the time domain, wherein the sequence indication information is located before the SSB in the time domain, the load is located after the SSB in the time domain, and the sequence indication information, the SSB, and the load are sequentially adjacent in the time domain.

27. The method of any one of claims 24-26, wherein, The bandwidth of the load and the SSB in the frequency domain is the same or different.

28. The method of any one of claims 19-27, wherein, The method further comprises: The terminal device receives first information sent by the network device, and the first information is used to indicate a resource multiplexing manner between the SSB and the load.

29. The method of claim 28, wherein, The first information is carried in a physical broadcast channel (PBCH) of the SSB.

30. The method of any one of claims 19-29, wherein, The period of the PDCCH has an integer multiple relationship with the period of the SSB, and the period of the PDCCH is determined based on the period of the SSB.

31. The method of any one of claims 19-30, wherein, The method further comprises: The terminal device receives second information sent by the network device, and the second information is used to indicate a resource position of the PDCCH.

32. The method of claim 31, wherein, The second information comprises one or more of the following: The period of the PDCCH; A time domain position of the PDCCH in the period; A time domain length of the PDCCH; Information of a format of DCI carried in the PDCCH.

33. The method of claim 32, wherein, The time domain position of the PDCCH in the period includes one or more of the following: A slot-level position, used to indicate an offset between a target slot and a first slot in the period, the target slot being a slot in which the PDCCH is located in the period; A symbol-level position, used to indicate a symbol number of a starting time domain symbol of the PDCCH in the target slot.

34. The method of any one of claims 31-33, wherein, The second information is associated with one or more of the following: a bandwidth part (BWP); a carrier.

35. A terminal device, comprising: Comprise: A transceiver unit, configured to detect a physical downlink control channel (PDCCH) sent by a network device, wherein the PDCCH includes sequence indication information and a payload, the sequence indication information is used to indicate whether the payload includes downlink control information (DCI) or downlink data of the terminal device, and the payload is resource multiplexed with a synchronization signal block (SSB).

36. The terminal device of claim 35, wherein, The payload is frequency division multiplexed with the SSB.

37. The terminal device of claim 36, wherein, A starting position of the frequency division multiplexing between the payload and the SSB is a first time domain symbol of the payload and a first time domain symbol of the SSB.

38. The terminal device of claim 36 or 37, wherein, The payload and the SSB are adjacent in the frequency domain.

39. The terminal device of claim 38, wherein The payload is located on a low frequency side of the SSB in the frequency domain; or The payload is located on a high frequency side of the SSB in the frequency domain.

40. The terminal device of claim 35, wherein, The payload is time division multiplexed with the SSB.

41. The terminal device of claim 40, wherein, The sequence indication information and the payload are continuous in the time domain, wherein the payload is located after the sequence indication information in the time domain, the sequence indication information is located after the SSB in the time domain, and the SSB, the sequence indication information, and the payload are sequentially adjacent in the time domain.

42. The terminal device of claim 40, wherein, The sequence indication information and the payload are discontinuous in the time domain, wherein the sequence indication information is located before the SSB in the time domain, the payload is located after the SSB in the time domain, and the sequence indication information, the SSB, and the payload are sequentially adjacent in the time domain.

43. The terminal device of any one of claims 40 to 42, wherein, The bandwidth of the payload and the SSB in the frequency domain is the same or different.

44. The terminal device of any one of claims 35 to 43, wherein, The transceiver unit is further configured to: receive first information sent by the network device, the first information being used to indicate a resource multiplexing manner between the SSB and the payload.

45. The terminal device of claim 44, wherein, The first information is carried in a physical broadcast channel (PBCH) of the SSB.

46. The terminal device of any one of claims 35 to 45, wherein, The period of the PDCCH has an integer multiple relationship with the period of the SSB, and the period of the PDCCH is determined based on the period of the SSB.

47. The terminal device of any one of claims 35 to 46, wherein, The transceiver unit is further configured to: receive second information sent by the network device, the second information being used to indicate a resource position of the PDCCH.

48. The terminal device of claim 47, wherein, The second information includes one or more of the following: The period of the PDCCH; A time domain position of the PDCCH in the period; A time domain length of the PDCCH; Information of a format of DCI carried in the PDCCH.

49. The terminal device of claim 48, wherein, The time domain position of the PDCCH in the period includes one or more of the following: a slot level position, used to indicate an offset between a target slot and a first slot in the period, the target slot being a slot in which the PDCCH is located in the period; a symbol level position, used to indicate a symbol number of a starting time domain symbol of the PDCCH in the target slot.

50. The terminal device of any one of claims 47-49, wherein, The second information is associated with one or more of the following: a bandwidth part (BWP); a carrier.

51. The terminal device of any one of claims 35 to 50, wherein, The transceiver is specifically configured to: in an initial access procedure, receive the SSB, and based on a resource position of the SSB, receive a payload of the PDCCH; or, after the initial access, receive sequence indication information of the PDCCH, and based on the sequence indication information of the PDCCH, determine whether to receive the payload of the PDCCH.

52. The terminal device of claim 51, wherein, The transceiver is specifically configured to: in a case where a sequence belonging to the terminal device is detected from the sequence indication information of the PDCCH, receive the payload of the PDCCH; or, in a case where no sequence belonging to the terminal device is detected from the sequence indication information of the PDCCH, determine not to receive the payload of the PDCCH.

53. A network device, comprising: comprise: a transceiver configured to send, to a terminal device, a physical downlink control channel (PDCCH), wherein the PDCCH includes sequence indication information and a payload, the sequence indication information is used to indicate whether downlink control information (DCI) or downlink data of the terminal device is included in the payload, and the payload is resource multiplexed with a synchronization signal block (SSB).

54. The network device of claim 53, wherein, The payload is frequency division multiplexed with the SSB.

55. The network device of claim 54, wherein, A starting position of the frequency division multiplexing between the payload and the SSB is a first time domain symbol of the payload and a first time domain symbol of the SSB.

56. The network device of claim 54 or 55, wherein, The payload and the SSB are adjacent in the frequency domain.

57. The network device of claim 56, wherein: the payload is located on a low frequency side of the SSB in the frequency domain; or, the payload is located on a high frequency side of the SSB in the frequency domain.

58. The network device of claim 53, wherein, The payload is time division multiplexed with the SSB.

59. The network device of claim 58, wherein, The sequence indication information and the payload are continuous in the time domain, wherein the payload is located after the sequence indication information in the time domain, the sequence indication information is located after the SSB in the time domain, and the SSB, the sequence indication information, and the payload are sequentially adjacent in the time domain.

60. The network device of claim 58, wherein, The sequence indication information and the payload are discontinuous in the time domain, wherein the sequence indication information is located before the SSB in the time domain, the payload is located after the SSB in the time domain, and the sequence indication information, the SSB, and the payload are sequentially adjacent in the time domain.

61. The network device of any of claims 58-60, wherein, The bandwidth of the payload and the SSB in the frequency domain is the same or different.

62. The network device according to any of claims 53-61, wherein, The transceiver is further configured to: send, to the terminal device, first information used to indicate a resource multiplexing manner between the SSB and the payload.

63. The network device of claim 62, wherein, The first information is carried in a physical broadcast channel (PBCH) of the SSB. 64.The network device according to any one of claims 53-63, wherein, The period of the PDCCH has an integer multiple relationship with the period of the SSB, and the period of the PDCCH is determined based on the period of the SSB.

65. The network device according to any of claims 53-64, wherein, The transceiver is further configured to: transmit second information to the terminal device, the second information being used to indicate a resource location of the PDCCH.

66. The network device of claim 65, wherein, The second information includes one or more of the following: a period of the PDCCH; a time domain location of the PDCCH in the period; a time domain length of the PDCCH; information of a format of DCI carried in the PDCCH.

67. The network device of claim 66, wherein, The time domain location of the PDCCH in the period includes one or more of the following: a slot level location, used to indicate an offset between a target slot and a first slot in the period, the target slot being a slot in which the PDCCH is located in the period; a symbol level location, used to indicate a symbol number of a starting time domain symbol of the PDCCH in the target slot. 68.The network device according to any one of claims 65 to 67, characterized in that, The second information is associated with one or more of the following: a bandwidth part (BWP); a carrier.

69. A terminal device, comprising: A device including a transceiver, a memory, and a processor, the memory being configured to store a program, the processor being configured to invoke the program in the memory and control the transceiver to receive or transmit a signal, so that the terminal device performs the method according to any one of claims 1 to 18.

70. A network device, comprising: A device including a transceiver, a memory, and a processor, the memory being configured to store a program, the processor being configured to invoke the program in the memory and control the transceiver to receive or transmit a signal, so that the network device performs the method according to any one of claims 19 to 34.

71. An apparatus, comprising: A device including a processor configured to invoke a program from a memory, so that the device performs the method according to any one of claims 1 to 18, or the method according to any one of claims 19 to 34.

72. A chip, comprising: A device including a processor configured to invoke a program from a memory, so that the device performs the method according to any one of claims 1 to 18, or the method according to any one of claims 19 to 34.

73. A computer-readable storage medium, comprising: A computer program product having a program stored thereon, the program causing a computer to perform the method according to any one of claims 1 to 18, or the method according to any one of claims 19 to 34.

74. A computer program product, characterized in that, A computer program product having a program stored thereon, the program causing a computer to perform the method according to any one of claims 1 to 18, or the method according to any one of claims 19 to 34.

75. A computer program, characterized in that, A computer program product having a program stored thereon, the program causing a computer to perform the method according to any one of claims 1 to 18, or the method according to any one of claims 19 to 34.

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