Method for wireless communication, terminal device, and network device

Abstract

Provided are a method for wireless communication, a terminal device, and a network device. The method for wireless communication comprises: a terminal device detects a first sequence, wherein the first sequence is used for demodulating one or more PDCCH candidates, and the first sequence is used for determining whether the one or more PDCCH candidates comprise a target PDCCH of the terminal device.

Description

Method, terminal device and network device for wireless communication TECHNICAL FIELD

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

[0002] In some communication systems (such as a new radio (NR) system), a terminal device receives a physical downlink control channel (PDCCH) through blind detection, that is, through decoding and cyclic redundancy check (CRC) on a PDCCH that may exist on each PDCCH candidate set, to detect whether there is a PDCCH sent to the terminal device itself, which will bring a large power consumption.

[0003] SUMMARY

[0004] The present application provides a method, a terminal device and a network device for wireless communication. The various aspects involved in the present application are introduced below.

[0005] In a first aspect, a method for wireless communication is provided, comprising: a terminal device detecting a first sequence, the first sequence being used for demodulating one or more PDCCH candidates, and the first sequence being used for determining whether the one or more PDCCH candidates include a target PDCCH of the terminal device.

[0006] In a second aspect, a method for wireless communication is provided, comprising: a network device sending a first sequence to a terminal device, the first sequence being used for demodulating one or more PDCCH candidates, and the first sequence being used for determining whether the one or more PDCCH candidates include a target PDCCH of the terminal device.

[0007] In a third aspect, a terminal device is provided, comprising: a detection module, configured to detect a first sequence, the first sequence being used for demodulating one or more PDCCH candidates, and the first sequence being used for determining whether the one or more PDCCH candidates include a target PDCCH of the terminal device.

[0008] In a fourth aspect, a network device is provided, comprising: a sending module, configured to send a first sequence to a terminal device, the first sequence being used for demodulating one or more PDCCH candidates, and the first sequence being used for determining whether the one or more PDCCH candidates include a target PDCCH of the terminal device.

[0009] In a fifth aspect, a terminal device is provided, which includes a processor, a memory, and a communication interface. The memory is configured to store one or more computer programs. The processor is configured to invoke the computer programs in the memory to cause the terminal device to perform some or all of the steps in the method of the first aspect.

[0010] In a sixth aspect, a network device is provided, which includes a processor, a memory, and a communication interface. The memory is configured to store one or more computer programs. The processor is configured to invoke the computer programs in the memory to cause the network device to perform some or all of the steps in the method of the second aspect.

[0011] In a seventh aspect, a communication system is provided, which includes the terminal device and / or the network device described above. In another possible design, the system can further include other devices interacting with the terminal device or the network device in the solutions provided by the embodiments of the present application.

[0012] In an eighth aspect, a computer-readable storage medium is provided, which stores a computer program. The computer program causes a computer to perform some or all of the steps in the methods of the above aspects.

[0013] In a ninth aspect, a computer program product is provided, which includes a non-transitory computer-readable storage medium storing a computer program. The computer program is operable to cause a computer to perform some or all of the steps in the methods of the above aspects. In some implementations, the computer program product can be a software installation package.

[0014] In a tenth aspect, a chip is provided, which includes a memory and a processor. The processor can invoke and run a computer program from the memory to implement some or all of the steps described in the methods of the above aspects.

[0015] In the embodiments of the present application, the terminal device can determine whether the target PDCCH of the terminal device is included in the PDCCH candidate by detecting the first sequence used to demodulate the PDCCH candidate, which is beneficial to reduce the blind decoding of the PDCCH, thereby reducing the power consumption caused by the PDCCH decoding and achieving energy saving of the terminal device. BRIEF DESCRIPTION OF DRAWINGS

[0016] FIG. 1 is an example diagram of a system architecture of a wireless communication system to which embodiments of the present application can be applied.

[0017] FIG. 2 is an example diagram of a PDCCH search space.

[0018] FIG. 3 is an example diagram of REG to CCE mapping.

[0019] FIG. 4 is another example diagram of REG to CCE mapping.

[0020] FIG. 5 is an example diagram of PDCCH DMRS.

[0021] FIG. 6 is a flow diagram of a method for wireless communication, according to embodiments of the present disclosure.

[0022] FIG. 7 is an example diagram of determining a target PDCCH based on a first sequence.

[0023] FIG. 8 is a schematic diagram of a terminal device, according to embodiments of the present disclosure.

[0024] FIG. 9 is a schematic diagram of a network device, according to embodiments of the present disclosure.

[0025] FIG. 10 is a schematic diagram of a communication apparatus, according to embodiments of the present disclosure. DETAILED DESCRIPTION

[0026] Communication system architecture

[0027] FIG. 1 is an example diagram of a system architecture of a wireless communication system 100 to which embodiments of the present disclosure 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 communication coverage for a specific geographic area and can communicate with the terminal device 120 located in the coverage area.

[0028] FIG. 1 exemplarily shows one network device and two terminal devices. Alternatively, the wireless communication system 100 can include a plurality of network devices and each network device can include other numbers of terminal devices within its coverage, which is not limited in the embodiments of the present disclosure.

[0029] Optionally, the wireless communication system 100 can further include a network controller, a mobile management entity, and other network entities, which are not limited in the embodiments of the present disclosure.

[0030] It should be understood that the technical solutions of the embodiments of the present disclosure can be applied to various communication systems, for example, a 5th 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 disclosure can also be applied to future communication systems, such as a 6th generation mobile communication system, a satellite communication system, and the like.

[0031] 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 station (MS), 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 that provides 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 functions, 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 UE can be used to act as a base station. For example, the UE can act as a scheduling entity, which provides sidelink signals between UEs in V2X or 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.

[0032] The network device in the embodiments of the present application can be a device for communicating with a terminal device, which can also be referred to as an access network device or a radio access network device, such as a network device, which can be a base station. The network device in the embodiments of the present application can refer to a radio access network (RAN) node (or device) that accesses a terminal device to a wireless network. The base station can broadly cover various names in the following or be replaced by the following names, such as: Node B (NodeB), evolved Node B (eNB), next generation Node B (gNB), relay station, transmitting and receiving point (TRP), transmitting point (TP), master station MeNB, auxiliary station SeNB, multi-standard radio (MSR) node, 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, etc. 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. The base station can also refer to a communication module, modem or chip for being disposed in the foregoing devices or apparatuses. The base station can also be a mobile switching center and a device that undertakes a base station function in device-to-device (D2D), vehicle-to-everything (V2X), machine-to-machine (M2M) communication, a network side device in a 6G network, a device that undertakes a base station function in a future communication system, etc. The base station can support networks of the same or different access technologies. The embodiments of the present application do not limit the specific technology and specific device form adopted by the network device.

[0033] The base station can be fixed or mobile. For example, a helicopter or a drone can be configured to act as a mobile base station, and one or more cells can move according to the location of the mobile base station. In other examples, the helicopter or the drone can be configured to act as a device that communicates with another base station.

[0034] In some deployments, the network device in the embodiments of the present application can refer to a CU or a DU, or the network device includes a CU and a DU. The gNB can also include an AAU.

[0035] The network device and the terminal device can be deployed on land, including indoors or outdoors, handheld or vehicle-mounted; can also be deployed on water surface; can also be deployed on aircraft, balloons and satellites in the air. The scenarios in which the network device and the terminal device are located are not limited in the embodiments of the present application.

[0036] It should be understood that all or part of the functions of the communication device in the present application can also be implemented by software functions running on hardware, or by virtualized functions instantiated on a platform (such as a cloud platform).

[0037] Resources of PDCCH

[0038] The PDCCH can be used to carry (or bear) DCI to transmit the DCI to the terminal device through the PDCCH. According to the format of the DCI carried by the PDCCH, the network device can indicate different control information to the terminal device, such as indicating downlink scheduling information, uplink scheduling information, slot format, etc.

[0039] In some embodiments, the network device can indicate the resources (such as time-frequency resources) of the PDCCH to the terminal device, so that the terminal device detects the PDCCH on the indicated resources. Taking the NR system as an example, the network device can indicate the search space and / or control resource set (CORESET) of the PDCCH to the terminal device, so that the terminal device detects the PDCCH according to the indicated search space and / or CORESET.

[0040] In some embodiments, the PDCCH search space can be used to indicate the time-frequency resources for detecting the PDCCH. In some embodiments, the CORESET can be used to indicate the resource block (RB) occupied by the PDCCH in the frequency domain and the number of orthogonal frequency division multiplexing (OFDM) symbols occupied by the PDCCH in the time domain, etc.

[0041] In some embodiments, the search space indicated by the network device to the terminal device can include a common search space (CSS) and a terminal device specific search space. In some embodiments, the terminal device specific search space can also be referred to as a UE specific search space (USS).

[0042] In some embodiments, the common search space can include a PDCCH common search space, used for the terminal device to receive a PDCCH scheduling common information or a PDCCH corresponding to information of a terminal device group.

[0043] In some embodiments, the terminal device-specific search space can include a PDCCH terminal device-specific search space, used for the terminal device to receive a PDCCH scheduling terminal device-specific information.

[0044] In some embodiments, the PDCCH search space configuration indicated by the network device can include a CORESET corresponding to the PDCCH search space.

[0045] In some embodiments, the network device can indicate the configuration information of the PDCCH search space and / or the CORESET to the terminal device through radio resource control (RRC) signaling (or RRC configuration information).

[0046] In some embodiments, the search space mentioned in the embodiments of the present application can also be referred to as a search space set.

[0047] The configuration information of the PDCCH search space and the CORESET will be introduced below taking the NR system as an example.

[0048] In the NR system, the configuration information of the PDCCH search space can include one or more of the following information: search space identifier (ID), CORESET ID, monitoring slot period and offset, duration, symbol position in the monitored slot, PDCCH candidate, type of search space.

[0049] The search space ID can also be referred to as a search space index, which can be used to identify the corresponding search space configuration. In the NR system, up to 10 search spaces can be configured on each bandwidth part (BWP), and the search space IDs of different search spaces are different.

[0050] The CORESET ID is used to indicate the ID of the CORESET configuration, or in other words, the CORESET ID is used to indicate the CORESET associated with the search space.

[0051] The monitoring slot periodicity and offset can be used to indicate the periodicity of the monitoring slot and the offset within the periodicity, or in other words, the monitoring slot periodicity and offset can be used to indicate the periodicity of the search space and the offset within the periodicity. The periodicity currently supported by the NR system includes 1, 2, 4, 5, 8, 10, 16, 20, 40, 80, 160, 320, 640, 1280, 2560 slots. In some embodiments, the monitoring slot periodicity and offset can be indicated by the parameter monitoringSlotPeriodicityAndOffset, for example.

[0052] The duration can be used to indicate the number of slots that the terminal device continuously monitors within the PDCCH search space periodicity.

[0053] The symbol position within the monitoring slot can be used to indicate the position of the first symbol of the CORESET monitored in the slot. In some embodiments, the symbol position within the monitoring slot can be indicated by the parameter monitoringSymbolsWithinSlot, for example.

[0054] The PDCCH candidate can be used to indicate the configuration information of the PDCCH candidate, for example, to indicate the number of PDCCH candidates.

[0055] The type of search space can be used to indicate whether the PDCCH search space is a common search space or a terminal device specific search space.

[0056] As can be seen, the configuration information of the search space can include the detection periodicity, the slot offset, the number of slots, the symbol position within the slot, and the like. For ease of understanding, an example of the PDCCH search space is given below in conjunction with FIG. 2. As shown in FIG. 2, the detection periodicity of the PDCCH search space is 10 slots, the slot offset is 5 slots, the number of slots is 2 slots, and the determination of the symbol position within the slot needs to be determined in combination with the CORESET configuration information corresponding to the CORESET ID. The CORESET corresponding to the CORESET ID contains two symbols, therefore, the symbol set of the two CORESETs is monitored within the monitoring slot, and the first symbol position within the slot is symbol 0 and 7.

[0057] In the NR system, the configuration information of the CORESET of the PDCCH can include one or more of the following information: CORESET ID, frequency domain resource, duration, resource mapping manner, and precoding granularity.

[0058] The CORESET ID can be used to indicate the number of the CORESET, and different CORESETs correspond to different CORESET IDs. In the NR system, the number of the CORESET ranges from 0 to 11, where CORESET 0 is the CORESET indicated in the broadcast message, and the value range of the CORESET ID in the RRC configuration information ranges from 1 to 11.

[0059] The frequency domain resource can be used to indicate the frequency domain resource of the CORESET, that is, to indicate the RBs included in the CORESET. In some embodiments, the frequency domain resource can be indicated, for example, by the parameter frequencyDomainResources.

[0060] The duration can be used to indicate the number of consecutive symbols of the CORESET. In some embodiments, the value range of the duration includes {1, 2, 3}.

[0061] The resource mapping manner can be used to indicate whether the resource mapping manner is interleaved mapping or non-interleaved mapping. In some embodiments, the resource mapping manner can be indicated, for example, by the parameter cce-REG-MappingType.

[0062] The precoding granularity can be used to indicate whether the precoding granularity of the demodulation reference signal (DMRS) of the PDCCH is wideband precoding or narrowband precoding. In some embodiments, the precoding granularity can be indicated, for example, by the parameter precoderGranularity.

[0063] Structure of PDCCH

[0064] The time-frequency resources in the CORESET can be in units of resource element groups (REGs). One REG can include one OFDM symbol in the time domain and one physical resource block (PRB) in the frequency domain, which includes 12 resource elements (REs).

[0065] In some embodiments, within the CORESET, the REGs can be numbered in the order of time domain first and then frequency domain.

[0066] In some embodiments, a plurality of REGs can form a REG bundle. In some embodiments, the REG bundle can form a channel control element (CCE), where each CCE includes 6 REGs.

[0067] In some embodiments, one PDCCH or PDCCH candidate is composed of CCEs, and the number of CCEs composing the PDCCH is referred to as the aggregation level. Taking the NR system as an example, the aggregation levels of CCEs supported in NR include 1, 2, 4, 8, 16, that is, the resources of one PDCCH or PDCCH candidate can be composed of 1, 2, 4, 8, 16 CCEs.

[0068] In some embodiments, the REGs in the CORESET are mapped to the CCEs in the order of time domain first and frequency domain second. In some embodiments, the REG-to-CCE mapping process is related to the resource mapping manner and the duration of the CORESET. The following gives an example of REG mapping to CCE in combination with FIG. 3 and FIG. 4.

[0069] FIG. 3 is an example of REG mapping to CCE in a non-interleaved manner. As shown in FIG. 3, in the case of different durations of the CORESET, the CCEs obtained by REG mapping are different. For example, when the duration of the CORESET is 1 symbol, one CCE obtained by REG mapping is composed of 1 symbol in the time domain and 6 RBs in the frequency domain; when the duration of the CORESET is 2 symbols, one CCE obtained by REG mapping is composed of 2 symbols in the time domain and 3 RBs in the frequency domain; when the duration of the CORESET is 3 symbols, one CCE obtained by REG mapping is composed of 3 symbols in the time domain and 2 RBs in the frequency domain.

[0070] FIG. 4 is an example of REG mapping to CCE in an interleaved manner. In the example of FIG. 4, the duration of the CORESET is 3 symbols, and 3 REGs constitute one REG bundle.

[0071] PDCCH DMRS

[0072] In some embodiments, the CCEs of the PDCCH can include a DMRS, which is used for demodulating the PDCCH. In some embodiments, the PDCCH DMRS is fixed on subcarriers 1, 5, 9 in each PRB, and one DMRS is mapped every 4 subcarriers. The following gives an example of PDCCH DMRS in combination with FIG. 5. In the example of FIG. 5, the CORESET contains 2 symbols and 2 PRBs, and for each symbol, the DMRS is located on subcarriers 1, 5, 9 of each PRB in the two PRBs corresponding to the symbol.

[0073] In the NR system, the sequence of the PDCCH DMRS on OFDM symbol l is shown in expression (1).

[0074] wherein c(i) is a pseudo-random sequence. The initialization of c(i) is shown in expression (2).

[0075] wherein, is the number of symbols in a slot, l is the index of OFDM symbol within a slot, is the index of slot within a radio frame, N ID is determined according to higher layer configuration parameter pdcch-DMRS-ScramblingID, N ID ∈{0,1,…,65535}.

[0076] It should be noted that the pdcch-DMRS-ScramblingID parameter is used to indicate N ID If this parameter is not configured, wherein, is the physical cell ID (physCellId) configured by the serving cell, and the physical cell ID can be used to identify and distinguish different cells.

[0077] The PDCCH DMRS can include different mapping modes. Taking the NR system as an example, the NR system can support two PDCCH DMRS mapping modes, mapping mode 1 and mapping mode 2.

[0078] Mapping mode 1: If the high-layer parameter precoderGranularity is equal to sameAsREG-bundle, the DMRS resource is located in the REG constituting the PDCCH that the terminal device attempts to decode. That is, in mapping mode 1, the PDCCH DMRS resource is mapped into the REG in which one PDCCH candidate in the PDCCH candidate set is located.

[0079] Mapping mode 2: If the high-layer parameter precoderGranularity is equal to allContiguousRBs, the DMRS resource is located in the REG within the contiguous resource block set in the CORESET in which the terminal device attempts to decode the PDCCH. That is, in mapping mode 2, the PDCCH DMRS resource is mapped into all the REGs in the CORESET.

[0080] PDCCH blind detection

[0081] In the process of receiving the PDCCH, the terminal device searches the PDCCH on the CORESET, that is, attempts to detect the PDCCH by continuously demodulating the PDCCH candidate (or the PDCCH candidate set), which is called PDCCH blind detection. The PDCCH candidate or the PDCCH candidate set can include a set of CCEs in which the PDCCH can exist in the CORESET, including the starting position and the number of CCEs, and the specific CCEs can be determined by a search space function.

[0082] In some embodiments, the terminal device can determine the CCE aggregation level in which the PDCCH can be sent and the corresponding number of blind detections by receiving the nrofCandidates parameter in the search space. Then, the terminal device can perform a decoding operation on each PDCCH candidate set in the PDCCH search space, and stop the blind detection process once the decoding is successful.

[0083] As described above, the terminal device receives the PDCCH by blind detection, that is, the terminal device needs to decode and CRC the PDCCH that can exist on each PDCCH candidate set to detect whether there is a PDCCH sent to the terminal device itself, which can cause a large power consumption.

[0084] To solve the above problem, the embodiments of the present application can determine whether the target PDCCH of the terminal device is included in the PDCCH candidate by using the first sequence (such as the DMRS sequence) for demodulating the PDCCH candidate, which is beneficial to reduce the blind decoding of the PDCCH, thereby reducing the power consumption caused by the PDCCH decoding and achieving energy saving of the terminal device. This is because the performance of the first sequence detection is better than that of the PDCCH decoding (for example, the performance of the DMRS detection is about 1 decibel (dB) better than that of the PDCCH decoding), which means that the first sequence detection can more reliably identify the existence of the PDCCH and reduce the power consumption caused by the PDCCH decoding. In this way, the terminal device can improve the accuracy of PDCCH detection while maintaining low power consumption. That is, the embodiments of the present application can reduce or avoid the blind decoding operation of the PDCCH, thereby achieving energy saving of the terminal device.

[0085] The first sequence will be described in detail below.

[0086] In an embodiment of the present application, the first sequence can be used to demodulate the PDCCH. For example, the first sequence can be used to demodulate one or more PDCCH candidates, or in other words, the first sequence can be used to demodulate a PDCCH candidate set, where one PDCCH candidate set can include one or more PDCCH candidates. As an example, one first sequence can demodulate one PDCCH candidate. As another example, one first sequence can demodulate multiple PDCCH candidates.

[0087] Embodiments of the present application do not make specific limitations on the multiple PDCCH candidates demodulated by the first sequence. For example, the multiple PDCCH candidates can be scrambled using the same radio network temporary identifier (RNTI), or can be scrambled using different RNTIs. For another example, the multiple PDCCH candidates can carry DCI of the same DCI format, or can carry DCI of different DCI formats. For yet another example, the multiple PDCCH candidates can carry DCI of the same DCI size, or can carry DCI of different DCI sizes.

[0088] In some embodiments, the one or more PDCCH candidates described above can be detected on a search space (such as a common search space and / or a terminal device-specific search space) indicated by the network device.

[0089] In an embodiment of the present application, the first sequence can be used to determine whether one or more PDCCH candidates include a target PDCCH of the terminal device. For example, the first sequence can be used to demodulate one or more PDCCHs, and to determine whether the one or more PDCCH candidates include a target PDCCH of the terminal device.

[0090] In some embodiments, the target PDCCH of the terminal device can refer to a PDCCH that the terminal device wants to receive (or in other words, a PDCCH that the terminal device expects), or in other words, the target PDCCH of the terminal device can refer to a PDCCH sent to the terminal device.

[0091] Embodiments of the present application do not make specific limitations on the target PDCCH of the terminal device. In some embodiments, the target PDCCH of the terminal device includes a PDCCH sent to the terminal device, taking the terminal device as terminal device A for example, the target PDCCH of terminal device A includes a PDCCH sent to terminal device A. In some embodiments, the target PDCCH of the terminal device includes a PDCCH sent to a group of terminal devices (which includes the terminal device), taking the terminal device as terminal device A for example, the target PDCCH of terminal device A includes a PDCCH sent to a group of terminal devices (which includes terminal device A).

[0092] Exemplarily, the target PDCCH of the terminal device can include one of the following: a terminal device specific PDCCH, a PDCCH corresponding to a terminal device group to which the terminal device belongs, a PDCCH scheduling common information, a PDCCH carrying a target DCI format, and a PDCCH carrying a target DCI size.

[0093] In some embodiments, the terminal device specific PDCCH refers to a PDCCH that is specifically sent for a certain terminal device, or a control channel that is specifically configured for a certain terminal device and used to send control information to the terminal device. In some embodiments, the terminal device specific PDCCH can also be understood or replaced as a dedicated PDCCH of the terminal device. In this way, the PDCCHs corresponding to different terminal devices are different.

[0094] In some embodiments, the terminal device specific PDCCH can be scrambled using a terminal device specific RNTI.

[0095] In some embodiments, the terminal device specific PDCCH is detected in a terminal device specific search space.

[0096] In some embodiments, the PDCCH scheduling common information can include one or more of the following: a PDCCH scheduling paging information, a PDCCH scheduling system information, a PDCCH scheduling random access response information, and the like.

[0097] In some embodiments, the PDCCH corresponding to the terminal device group to which the terminal device belongs, the PDCCH scheduling common information, the PDCCH carrying the target DCI format, or the PDCCH carrying the target DCI size can be scrambled using a common RNTI, for example, a RNTI corresponding to a common search space of the terminal device.

[0098] In some embodiments, the PDCCH corresponding to the terminal device group to which the terminal device belongs, the PDCCH scheduling common information, the PDCCH carrying the target DCI format, or the PDCCH carrying the target DCI size is detected in a common search space of the terminal device.

[0099] For ease of understanding, several examples of the target PDCCH of the terminal device are given below. Taking the terminal device in the idle state as an example, the target PDCCH of the terminal device can include a PDCCH scheduling paging information. Taking the terminal device initiating random access as an example, after the terminal device initiates random access, the target PDCCH of the terminal device can include a PDCCH scheduling random access response information. Taking the terminal device having uplink data waiting to be sent as an example, the target PDCCH of the terminal device can include a PDCCH carrying uplink authorization, and the like.

[0100] In some embodiments, the first sequence can be a DMRS sequence. However, the embodiments of the present application are not limited thereto, for example, the first sequence can be a sequence with the same or similar function as the DMRS sequence in future communication systems.

[0101] In some embodiments, the first sequence corresponds to the target PDCCH. In this way, the terminal device can determine whether there is the target PDCCH of the terminal device by detecting the first sequence, without the need to decode the PDCCH and perform CRC determination, thereby reducing the blind detection of the PDCCH.

[0102] Taking the target PDCCH including a terminal device specific PDCCH as an example, the first sequence corresponding to the target PDCCH can be understood as that the first sequence can be a terminal device specific sequence, that is, different terminal devices correspond to different first sequences. Or in other words, the first sequence is configured in the granularity of the terminal device.

[0103] Taking the target PDCCH including a PDCCH corresponding to a terminal device group to which the terminal device belongs, a PDCCH scheduling common information, a PDCCH carrying a target DCI format, or a PDCCH carrying a target DCI size as an example, the first sequence corresponding to the target PDCCH can be understood as that the first sequence is configured (designed) for a group of terminal devices, that is, different terminal device groups correspond to different first sequences. Or in other words, the first sequence is configured in the granularity of the terminal device group.

[0104] The embodiments of the present application do not limit the group of terminal devices. For example, the group of terminal devices can include a paging terminal device group. For another example, the group of terminal devices can include a group of terminal devices carrying the same DCI format. For another example, the group of terminal devices can include a group of terminal devices carrying the same DCI size, and the like.

[0105] Compared with the design of the existing PDCCH DMRS sequence, the first sequence in the embodiments of the present application corresponds to the target PDCCH, which is beneficial to reduce or avoid the terminal device blind decoding the PDCCH, and realizes the energy saving of the terminal device. This is because, the existing PDCCH DMRS sequence is designed according to N IDinitialized (see expression (1) and expression (2) introduced above), and N ID is a cell common parameter, and the initialization of the corresponding DMRS is the same for all terminal devices in the cell. In this way, when the terminal device detects the DMRS, it can only determine that there is PDCCH transmission, but further decoding of the PDCCH is required to determine whether there is a target PDCCH of the terminal device. In the embodiment of the application, the first sequence can correspond to a specific terminal device or a group of terminal devices, which can reduce the range of blind decoding of the PDCCH by the terminal device and achieve energy saving of the terminal device.

[0106] The embodiment of the application does not limit the type of the first sequence. For example, the first sequence can include one or more of the following: a terminal device specific sequence, a sequence corresponding to a common search space of a terminal device, and a sequence corresponding to a terminal device group to which the terminal device belongs.

[0107] The embodiment of the application does not limit the generation method of the first sequence, as long as the first sequence can be used to determine whether one or more PDCCH candidates include a target PDCCH of a terminal device. For ease of understanding, the generation method of the first sequence is exemplarily introduced below.

[0108] In some embodiments, the first sequence is generated based on a first parameter.

[0109] In some embodiments, the first parameter is a terminal device specific parameter, or in other words, the first parameter is a terminal device exclusive parameter. In other words, the first parameter is configured in the granularity of a terminal device. In this way, the first parameters corresponding to different terminal devices are different.

[0110] In some embodiments, if the first parameter is a terminal device specific parameter, the first sequence generated based on the first parameter is a terminal device specific sequence, or in other words, the first sequence generated based on the first parameter is a terminal device exclusive sequence. In this way, the first sequences corresponding to different terminal devices are different. For example, if the DMRS sequence is generated based on a terminal device specific parameter, the DMRS sequences corresponding to different terminal devices are different.

[0111] In some embodiments, in a terminal device specific search space, the first sequence can be generated based on a terminal device specific parameter. In other words, the scheme of generating the first sequence based on a terminal device specific parameter can be applied to the scenario of a terminal device specific search space.

[0112] In some embodiments, the first parameter is a parameter corresponding to a group of terminal devices, or in other words, the first parameter is configured in a granularity of a group of terminal devices. In this way, a group of terminal devices can correspond to one first parameter, and different groups of terminal devices correspond to different first parameters.

[0113] In some embodiments, if the first parameter is a parameter corresponding to a group of terminal devices (i.e., a group of terminal devices correspond to the same value of the first parameter), the first sequence is a sequence corresponding to a group of terminal devices. In this way, different groups of terminal devices correspond to different first sequences. Taking the first sequence as a DMRS sequence as an example, if the DMRS sequence is generated based on a parameter corresponding to a group of terminal devices, different groups of terminal devices correspond to different DMRS sequences.

[0114] In some embodiments, in the common search space of the terminal device, the first sequence can be generated based on a parameter corresponding to a group of terminal devices. That is, the scheme of generating the first sequence based on a parameter corresponding to a group of terminal devices can be applied to the scenario of the common search space of the terminal device.

[0115] The embodiments of the present application do not make specific limitations on the first parameter, as long as the parameter is a terminal device specific parameter or a parameter corresponding to a group of terminal devices, and the parameter can be used to generate the first sequence. Exemplarily, the first parameter can include one or more of the following: RNTI, related information of the DCI carried by the PDCCH.

[0116] As an implementation manner, the first parameter can include RNTI, for example, the first parameter can include terminal device specific RNTI and / or RNTI corresponding to the common search space of the terminal device. Taking the first parameter including terminal device specific RNTI as an example, different terminal devices correspond to different RNTIs, and thus different terminal devices correspond to different first sequences. Taking the first parameter including RNTI corresponding to the common search space of the terminal device as an example, a group of terminal devices with the same RNTI can correspond to the same first sequence, and a group of terminal devices with different RNTIs can correspond to different first sequences.

[0117] The embodiments of the present application do not limit the terminal device specific RNTI. Exemplarily, the terminal device specific RNTI can include one or more of the following RNTIs: cell RNTI (C-RNTI), configured scheduling RNTI (CS-RNTI), modulation and coding scheme cell RNTI (MCS-C-RNTI), semi-persistent channel state information RNTI (SP-CSI-RNTI), sidelink RNTI (SL-RNTI), sidelink configured scheduling RNTI (SL-CS-RNTI), V2X RNTI (V-RNTI), sidelink positioning reference signal configured scheduling RNTI (SL-PRS-CS-RNTI), and network controlled repeater RNTI (NCR-RNTI).

[0118] The RNTI corresponding to the common search space of the terminal device is not limited by the embodiments of the present application. Exemplarily, the RNTI corresponding to the common search space of the terminal device can include one or more of the following: paging RNTI (P-RNTI), system information RNTI (SI-RNTI), random access RNTI (RA-RNTI), multimedia control channel RNTI (MCCH-RNTI), multicast-MCCH-RNTI, group RNTI (G-RNTI), message B RNTI (MsgB-RNTI), temporary cell RNTI (TC-RNTI), group configured scheduling RNTI (G-CS-RNTI), slot format indicator RNTI (SFI-RNTI), interruption RNTI (INT-RNTI), transmit power control sounding reference signal RNTI (TPC-SRS-RNTI), cancellation indication RNTI (CI-RNTI), availability indicator RNTI (AI-RNTI), power saving RNTI (PS-RNTI), paging early indication RNTI (PEI-RNTI), and cell discontinuous transmission / reception RNTI (cellDTRX-RNTI).

[0119] It should be noted that in some embodiments, the RNTI corresponding to the common search space of some terminal devices can correspond to the DCI format. As an example, the SFI-RNTI can correspond to the DCI format 2_0, where the DCI format 2_0 can be used to carry the slot format information. As an example, the INT-RNTI can correspond to the DCI format 2_1, where the DCI format 2_1 can be used to carry the interruption transmission indication information. As an example, the TPC-SRS-RNTI can correspond to the DCI format 2_3, where the DCI format 2_3 can be used to carry the SRS switching information. As an example, the CI-RNTI can correspond to the DCI format 2_4, where the DCI format 2_4 can be used to carry the uplink transmission cancellation information. As an example, the AI-RNTI can correspond to the DCI format 2_5, where the DCI format 2_5 can be used to carry the soft resource information. As an example, the PS-RNTI can correspond to the DCI format 2_6, where the DCI format 2_6 can be used to carry the power saving information. As an example, the PEI-RNTI can correspond to the DCI format 2_7, where the DCI format 2_7 can be used to carry the paging early indication information. As an example, the cellDTRX-RNTI can correspond to the DCI format 2_9, where the DCI format 2_9 can be used to carry the DTX / DRX activation (deactivation) information.

[0120] As an implementation manner, the first parameter can include the related information of the DCI carried by the PDCCH. For example, the first parameter can include the related information of the DCI carried by one or more PDCCH candidates.

[0121] The embodiments of the present application do not limit the related information of the DCI carried by the PDCCH. For example, the related information of the DCI carried by the PDCCH can include one or more of the following: DCI format, DCI size. In this way, the first sequence can be generated based on the DCI format and / or the DCI size of the PDCCH. For example, the first sequence is generated based on the DCI format of the PDCCH, the first sequence corresponding to different DCI formats of the PDCCH is different, and the first sequence corresponding to the same DCI format of the PDCCH can be the same. For example, the first sequence is generated based on the DCI size of the PDCCH, the first sequence corresponding to different DCI sizes of the PDCCH is different, and the first sequence corresponding to the same DCI size of the PDCCH can be the same.

[0122] The embodiments of the present application do not limit the implementation manner of how to generate the first sequence by using the DCI format and / or the DCI size. For example, the first sequence can be generated by using the number of the DCI format and / or the number of the DCI size.

[0123] In some embodiments, the first sequence can be generated based on a pseudo-random sequence. In some embodiments, the pseudo-random sequence can be generated based on the first parameter. That is, the first sequence is generated based on the first parameter can include that the first sequence is generated based on a pseudo-random sequence, and the pseudo-random sequence is generated based on the first parameter.

[0124] Embodiments of the present application do not limit the implementation of how the first sequence is generated based on the pseudo-random sequence. As an example, the first sequence can be generated based on iterations of the pseudo-random sequence. As a possible implementation, the first sequence can be generated based on expression (3).

[0125] where c(i) is the pseudo-random sequence, and c(i) is generated based on the first parameter.

[0126] However, embodiments of the present application are not limited thereto, as long as the pseudo-random sequence in the first sequence is generated based on the first parameter. For example, the first sequence can be obtained by modifying expression (3). As an example, the first sequence can be generated based on expression (4).

[0127] where c(i) is the pseudo-random sequence, and c(i) is initialized based on the first parameter.

[0128] Embodiments of the present application do not limit the implementation of how the above-mentioned pseudo-random sequence is generated (e.g., initialized) based on the first parameter. Exemplarily, the pseudo-random sequence can be generated based on one or more of the following: the number of symbols in a time slot, the number of symbols within a time slot, the number of time slots within a radio frame, the first parameter.

[0129] As a possible implementation, the pseudo-random sequence can be initialized based on expression (5).

[0130] where c init is the initialized pseudo-random sequence, is the number of symbols in a time slot, l is the number of OFDM symbols within a time slot, is the number of time slots within a radio frame, and N1 is the first parameter.

[0131] However, embodiments of the present application are not limited thereto, as long as the generation of the pseudo-random sequence is related to the first parameter. For example, the generation of the pseudo-random sequence can be obtained by modifying expression (5). As an example, the pseudo-random sequence can be initialized based on expression (6).

[0132] where c init is the initialized pseudo-random sequence, is the number of symbols in a slot, and l is the index of the OFDM symbol within the slot, is the index of the slot within the radio frame, and N1 is the first parameter.

[0133] The embodiments of the present application do not limit the value range of the first parameter. As an example, the first parameter can be 16-bit long information, and the value range of the first parameter can be N1∈{0, 1, …, 65535}. Of course, the value range of the first parameter can also be other ranges. For example, the first parameter can be 8-bit long information, and the value range of the first parameter can be N1∈{0, 1, …, 255}. For another example, the first parameter can be 32-bit long information, and the value range of the first parameter can be N1∈{0, 1, …, 4294967295}.

[0134] In some embodiments, the first parameter can be configured by the network device. However, the embodiments of the present application are not limited thereto, for example, the first parameter can also be predefined by the protocol, or determined by the terminal device according to certain rules.

[0135] In order to facilitate understanding, the following embodiments introduce the generation manner of the first sequence.

[0136] Embodiment 1: The first sequence is a terminal device specific sequence

[0137] In embodiment 1, the first sequence is a terminal device specific sequence, so different terminal devices correspond to different first sequences. In this way, when the terminal device detects the first sequence, it can determine whether there is a PDCCH sent to the terminal device itself, so as to not need to blindly detect the PDCCH, and realize terminal device energy saving.

[0138] In some embodiments, the first sequence is generated based on terminal device specific information. For example, the first sequence is generated based on terminal device specific RNTI. Of course, the first sequence can also be generated based on information other than the terminal device specific RNTI, and the information corresponding to different terminal devices is different.

[0139] As an implementation manner, the first sequence is generated based on a pseudo-random sequence, and the pseudo-random sequence is determined based on terminal device specific information. For example, the pseudo-random sequence is initialized based on terminal device specific RNTI.

[0140] As an example, the pseudo-random sequence corresponding to the first sequence can be initialized based on the above expression (5), and the first parameter in expression (5) is the terminal device specific RNTI.

[0141] In some embodiments, the terminal device-specific RNTI can be 16-bit long ID information. For example, the terminal device-specific RNTI can have a value range of N1∈{0, 1, …, 65535}. Of course, the terminal device-specific RNTI can also be 8-bit long or 32-bit long ID information, etc.

[0142] Embodiment 2: The first sequence is a sequence corresponding to a common search space of the terminal device

[0143] In embodiment 2, the first sequence corresponds to the RNTI corresponding to the corresponding common search space type. Or in other words, when the terminal device searches PDCCH in the common search space, the first sequence corresponds to the RNTI corresponding to the corresponding common search space type. In this way, the terminal device can exclude a part of PDCCH candidates by detecting the first sequence, narrow the range of PDCCH blind detection, and achieve terminal device energy saving.

[0144] In some embodiments, the first sequence is generated based on the RNTI corresponding to the common search space of the terminal device.

[0145] As an implementation manner, the first sequence is generated based on a pseudo-random sequence determined based on the RNTI corresponding to the common search space of the terminal device. For example, the pseudo-random sequence is initialized based on the RNTI corresponding to the common search space of the terminal device.

[0146] As an example, the pseudo-random sequence corresponding to the first sequence can be initialized based on the above expression (5), and the first parameter in expression (5) is the RNTI corresponding to the common search space of the terminal device.

[0147] In some embodiments, the RNTI corresponding to the common search space of the terminal device can be 16-bit long ID information. For example, the RNTI corresponding to the common search space of the terminal device can have a value range of N1∈{0, 1, …, 65535}. Of course, the RNTI corresponding to the common search space of the terminal device can also be 8-bit long or 32-bit long ID information, etc.

[0148] It should be noted that both the embodiment 1 and the embodiment 2 are based on the RNTI to initialize the first sequence. However, the embodiments of the present application are not limited thereto. For example, the first parameter can be a parameter configured by the network device other than the RNTI. The first parameter can be a parameter specific to the terminal device (i.e., configured in the granularity of the terminal device), or a parameter corresponding to a group of terminal devices (e.g., configured in the granularity of a group of terminal devices). In this way, the network device and / or the terminal device can determine the first sequence based on the first parameter configured by the network device. The first sequence can be a sequence specific to the terminal device, or a sequence corresponding to a common search space of the terminal device, or a sequence corresponding to a group of terminal devices.

[0149] Embodiment 3: The first sequence is generated based on related information of DCI carried by PDCCH

[0150] In the embodiment 3, the first sequence is generated based on related information of DCI carried by PDCCH. For example, the first sequence can be generated based on DCI format and / or DCI size.

[0151] In the embodiment 3, the network device can generate the first sequence based on related information of DCI carried by one or more PDCCH candidates. Correspondingly, the terminal device can detect the first sequence based on related information of target DCI when detecting the PDCCH candidate, to determine whether there is a target PDCCH carrying the target DCI. The target DCI can include DCI that the terminal device wants to (expect to) receive.

[0152] Taking that the first sequence is generated based on DCI format as an example, the network device can generate the first sequence based on DCI format carried by one or more PDCCH candidates. Correspondingly, the terminal device can detect the first sequence based on target DCI format, to determine whether there is a target PDCCH carrying the target DCI format.

[0153] Taking that the first sequence is generated based on DCI size as an example, the network device can generate the first sequence based on DCI size carried by one or more PDCCH candidates. Correspondingly, the terminal device can detect the first sequence based on target DCI size, to determine whether there is a target PDCCH carrying the target DCI size.

[0154] Taking that the first sequence is generated based on DCI format and DCI size as an example, the network device can generate the first sequence based on DCI format and DCI size carried by one or more PDCCH candidates. Correspondingly, the terminal device can detect the first sequence based on target DCI format and target DCI size, to determine whether there is a target PDCCH carrying the target DCI format and the target DCI size.

[0155] In some embodiments, the network device can generate the first sequence based on the related information of the DCI carried by one of the one or more PDCCH candidates.

[0156] In some embodiments, the network device can generate the first sequence based on the related information of the DCIs carried by multiple PDCCH candidates of the one or more PDCCH candidates. For example, the one or more PDCCH candidates carry the same DCI format and / or DCI size.

[0157] As an implementation manner, the first sequence is generated based on a pseudo-random sequence determined based on the related information of the DCI carried by the PDCCH. For example, the pseudo-random sequence is initialized based on the DCI format and / or DCI size of the DCI carried by the PDCCH.

[0158] As an example, the pseudo-random sequence corresponding to the first sequence can be initialized based on the above expression (5), and the first parameter in the expression (5) is the DCI format and / or DCI size of the DCI carried by the PDCCH.

[0159] In some embodiments, embodiment 3 can be applied to the process of detecting PDCCHs carrying different DCI formats and / or DCI sizes in the same search space, and the first sequence generated by embodiment 3 can determine whether there is a target PDCCH carrying a target DCI format and / or a target DCI size, so as to reduce blind detection of various DCI formats and / or DCI sizes, narrow the range of blind detection, and achieve energy saving of the terminal device.

[0160] Embodiments of the present application do not limit the resources of the first sequence. In some embodiments, the resources of the first sequence can be located in the resources (such as REGs) where one of the one or more PDCCH candidates demodulated by the first sequence is located. In other words, the first sequence can be mapped to the resources in the one of the one or more PDCCH candidates demodulated by the first sequence. However, embodiments of the present application are not limited thereto, for example, the resources of the first sequence can be located in the REGs in the set of contiguous resource blocks in the CORESET where the terminal device attempts to decode the PDCCH.

[0161] Embodiments of the present application do not limit the position of the first sequence, and the first sequence can be located at any position of the PRB, such as subcarriers 1, 5, and 9 in the PRB, subcarriers 2, 6, and 10 in the PRB, subcarriers 0, 3, 6, and 9 in the PRB, etc. In some embodiments, the position of the first sequence can be changed to adapt to different performance requirements and deployment scenarios.

[0162] The embodiments of the present application do not limit the frequency domain density of the first sequence. For example, one first sequence can be mapped to every four subcarriers. For another example, one first sequence can be mapped to every three subcarriers. For yet another example, one first sequence can be mapped to every six subcarriers, and so on. Increasing the frequency domain density of the first sequence is beneficial to improve the detection performance of the first sequence, and decreasing the frequency domain density of the first sequence is beneficial to reduce the overhead of the first sequence. In some embodiments, the frequency domain density of the first sequence can be variable to adapt to different performance requirements and deployment scenarios. For example, in the case of large transmission overhead, a lower frequency domain density of the first sequence can be used; in the case of poor detection performance of the first sequence, a higher frequency domain density of the first sequence can be used.

[0163] In some embodiments, the position and / or frequency domain density of the first sequence can be determined by the configuration of the network device. However, the embodiments of the present application are not limited thereto, for example, the position and / or frequency domain density of the first sequence can be predefined by the protocol.

[0164] The above describes the first sequence, in order to facilitate understanding, the flow of the present application is described below in combination with FIG. 6. It should be noted that the contents not described in detail below can be referred to the above description, for example, the first sequence, the target PDCCH, the first parameter and the like can be referred to the above description.

[0165] FIG. 6 is a flow diagram of a method for wireless communication provided by the embodiments of the present application. The method shown in FIG. 6 is described from the perspective of the interaction between the terminal device and the network device, for example, the terminal device and the network device can be the terminal device 120 and the network device 110 shown in FIG. 1 respectively.

[0166] The method shown in FIG. 6 includes step S620. In step S620, the terminal device detects the first sequence.

[0167] The first sequence can be used to demodulate one or more PDCCH candidates, and the first sequence can be used to determine whether the one or more PDCCH candidates include the target PDCCH of the terminal device.

[0168] In some embodiments, step S620 can include that the terminal device detects the first sequence based on the first parameter corresponding to the target PDCCH.

[0169] Taking the PDCCH specific to the terminal device as an example, the terminal device can detect the first sequence based on the first parameter specific to the terminal device to determine whether the one or more PDCCH candidates include the PDCCH specific to the terminal device.

[0170] For example, the target PDCCH includes a PDCCH corresponding to a terminal device group to which the terminal device belongs, the terminal device can detect the first sequence based on the first parameter corresponding to the terminal device group, to determine whether one or more PDCCH candidates include the PDCCH corresponding to the terminal device group.

[0171] For example, the target PDCCH includes a PDCCH scheduling common information, the terminal device can detect the first sequence based on the first parameter corresponding to the terminal device group, to determine whether one or more PDCCH candidates include the PDCCH scheduling common information. For example, the target PDCCH includes a paging PDCCH, and the first parameter includes RNTI, the terminal device can detect the first sequence based on P-RNTI, to determine whether one or more PDCCH candidates include the paging PDCCH. For example, the target PDCCH includes a SI PDCCH, and the first parameter includes RNTI, the terminal device can detect the first sequence based on SI-RNTI, to determine whether one or more PDCCH candidates include the SI PDCCH.

[0172] For example, the target PDCCH includes a PDCCH carrying a target DCI format, the terminal device can detect the first sequence based on the first parameter corresponding to the target DCI format, to determine whether one or more PDCCH candidates include the PDCCH carrying the target DCI format. For example, the target DCI format is DCI format 2_0, the terminal device can detect the first sequence based on the first parameter corresponding to the DCI format 2_0 (such as the number of DCI format 2_0), to determine whether one or more PDCCH candidates include the PDCCH carrying the DCI format 2_0. For example, the target DCI format is DCI format 2_7, the terminal device can detect the first sequence based on the first parameter corresponding to the DCI format 2_7 (such as the number of DCI format 2_7), to determine whether one or more PDCCH candidates include the PDCCH carrying the DCI format 2_7.

[0173] For example, the target PDCCH includes a PDCCH carrying a target DCI size, the terminal device can detect a first sequence based on a first parameter corresponding to the target DCI size, to determine whether one or more PDCCH candidates include the PDCCH carrying the target DCI size. For example, the target DCI size is 16 bits, the terminal device can detect a first sequence based on a first parameter corresponding to the DCI size of 16 bits (for example, a number of the DCI size of 16 bits), to determine whether one or more PDCCH candidates include the PDCCH carrying the DCI size of 16 bits. For example, the target DCI size is 32 bits, the terminal device can detect a first sequence based on a first parameter corresponding to the DCI size of 32 bits (for example, a number of the DCI size of 32 bits), to determine whether one or more PDCCH candidates include the PDCCH carrying the DCI size of 32 bits.

[0174] With reference back to FIG. 6, in some embodiments, the method shown in FIG. 6 can include step S610. In step S610, the network device sends a first sequence to the terminal device. After that, the terminal device can detect the first sequence.

[0175] In some embodiments, the method shown in FIG. 6 can include step S630a and / or step S630b. In step S630a, if the one or more PDCCH candidates demodulated by the first sequence include the target PDCCH of the terminal device, the terminal device decodes and checks the one or more PDCCH candidates. In step S630b, if the one or more PDCCH candidates demodulated by the first sequence do not include the target PDCCH of the terminal device, the terminal device skips decoding and checking the one or more PDCCH candidates.

[0176] In some embodiments, the terminal device skipping decoding and checking the one or more PDCCH candidates can also be understood or replaced as: the terminal device does not need to decode and check the one or more PDCCH candidates.

[0177] In some embodiments, when the terminal device determines that the target PDCCH exists, the terminal device can obtain the REs where the PDCCH is located from other REs of the CCE in the PDCCH candidate, and decode and check the PDCCH.

[0178] For related content of the terminal device decoding and checking the PDCCH candidate, please refer to the prior art, and for the sake of brevity, it will not be repeated here.

[0179] The implementation manner of the terminal device for determining whether the one or more PDCCH candidates include the target PDCCH of the terminal device based on the first sequence is not limited in the embodiments of the present application. For example, the terminal device can detect the first sequence according to the first parameter, and when a correlation peak value is detected, the terminal device determines that the target PDCCH is detected; otherwise, the terminal device determines that the target PDCCH is not detected.

[0180] In some embodiments, the terminal device can detect the first sequence in the CCE corresponding to each PDCCH candidate, and when a correlation peak value is detected, the terminal device determines that the target PDCCH is detected.

[0181] For ease of understanding, an example of the terminal device determining the target PDCCH is given below in combination with FIG. 7. The CORESET shown in FIG. 7 contains 2 symbols, and the REGs are mapped to 4 CCEs (CCE0-CCE3) in a non-interleaved manner. In the example of FIG. 7, if the terminal device needs to detect a PDCCH with an aggregation level of 2, CCE0 and CCE1 are a PDCCH candidate, and the terminal device first needs to determine the RE position of the first sequence in the REGs in CCE0 and CCE1, and then performs correlation detection on the first sequence mapped to the RE position to determine whether the PDCCH candidate includes the target PDCCH. In the example of FIG. 7, if the terminal device needs to detect a PDCCH with an aggregation level of 4, CCE0-CCE3 are a PDCCH candidate, and the terminal device first needs to determine the RE position of the first sequence in the REGs in CCE0-CCE3, and then performs correlation detection on the first sequence mapped to the RE position to determine whether the PDCCH candidate includes the target PDCCH.

[0182] Similarly, when the REGs are mapped to the CCEs in an interleaved manner, for a PDCCH candidate, the terminal device needs to determine the CCE and the REG corresponding to the PDCCH candidate, and then performs correlation detection on the first sequence mapped to the REG to determine whether the PDCCH candidate includes the target PDCCH.

[0183] The method embodiments of the present application are described in detail above in combination with FIGS. 1-7, and the device embodiments of the present application are described in detail below in combination with FIGS. 8-10. It should be understood that the description of the method embodiments corresponds to the description of the device embodiments, and therefore, the parts not described in detail can be referred to the foregoing method embodiments.

[0184] Fig. 8 is a structural schematic diagram of a terminal device provided in an embodiment of the present application. The terminal device 800 shown in Fig. 8 includes a detection module 810. The detection module 810 can be configured to detect a first sequence, the first sequence being used for demodulating one or more PDCCH candidates, and the first sequence being used for determining whether the one or more PDCCH candidates include a target PDCCH of the terminal device.

[0185] Optionally, the first sequence is generated based on a first parameter, wherein the first parameter is a terminal device-specific parameter, or the first parameter is a parameter corresponding to a group of terminal devices.

[0186] Optionally, the first parameter includes one or more of the following: an RNTI; and related information of DCI carried by the one or more PDCCH candidates.

[0187] Optionally, the RNTI includes one or more of the following: a terminal device-specific RNTI, and an RNTI corresponding to a common search space of the terminal device.

[0188] Optionally, the related information of DCI includes one or more of the following: a DCI format, and a DCI size.

[0189] Optionally, the first sequence is generated based on a pseudo-random sequence, and the pseudo-random sequence is generated based on the first parameter.

[0190] Optionally, the first sequence is generated based on the following expression: wherein r l (m) represents the first sequence at symbol l, c(i) is a pseudo-random sequence, and c(i) is initialized based on the first parameter.

[0191] Optionally, the pseudo-random sequence is initialized based on the following expression: wherein c init is an initialized pseudo-random sequence, is a number of symbols in a slot, l is a symbol number in a slot, is a slot number in a radio frame, and N1 is the first parameter.

[0192] Optionally, the first parameter is configured by a network device.

[0193] Optionally, the detection module is further configured to detect the first sequence based on a first parameter corresponding to the target PDCCH.

[0194] Optionally, the first sequence comprises one or more of the following: a sequence specific to the terminal device, a sequence corresponding to a common search space of the terminal device, a sequence corresponding to a group of terminal devices to which the terminal device belongs.

[0195] Optionally, the resource of the first sequence is located within a resource of one of the one or more PDCCH candidates.

[0196] Optionally, the terminal device further comprises an execution module 820 configured to: decode and check the one or more PDCCH candidates if the one or more PDCCH candidates comprise a target PDCCH of the terminal device; and / or skip decoding and checking the one or more PDCCH candidates if the one or more PDCCH candidates do not comprise the target PDCCH of the terminal device.

[0197] Optionally, the target PDCCH comprises one of the following: a PDCCH specific to the terminal device, a PDCCH corresponding to a group of terminal devices to which the terminal device belongs, a PDCCH scheduling common information, a PDCCH carrying a target DCI format, a PDCCH carrying a target DCI size.

[0198] Optionally, the detection module 810 can be a processor 1010. The terminal device 800 can further comprise a memory 1020 and a transceiver 1030, as shown in FIG. 10.

[0199] FIG. 9 is a structural schematic diagram of a network device according to an embodiment of the present application. The network device 900 shown in FIG. 9 comprises a sending module 910. The sending module 910 can be configured to send a first sequence to a terminal device, wherein the first sequence is used to demodulate one or more PDCCH candidates, and the first sequence is used to determine whether the one or more PDCCH candidates comprise a target PDCCH of the terminal device.

[0200] Optionally, the first sequence is generated based on a first parameter, wherein the first parameter is a parameter specific to a terminal device, or the first parameter is a parameter corresponding to a group of terminal devices.

[0201] Optionally, the first parameter comprises one or more of the following: an RNTI, and related information of a DCI carried by the one or more PDCCH candidates.

[0202] Optionally, the RNTI comprises one or more of the following: an RNTI specific to the terminal device, and an RNTI corresponding to a common search space of the terminal device.

[0203] Optionally, the related information of the DCI comprises one or more of the following: a DCI format, and a DCI size.

[0204] Optionally, the first sequence is generated based on a pseudo-random sequence, and the pseudo-random sequence is generated based on the first parameter.

[0205] Optionally, the first sequence is generated based on the following expression: wherein r l (m) represents the first sequence on symbol l, c(i) is a pseudo-random sequence, and c(i) is initialized based on the first parameter.

[0206] Optionally, the pseudo-random sequence is initialized based on the following expression: wherein c init is an initialized pseudo-random sequence, is a number of symbols in a time slot, l is a number of symbols in the time slot, is a number of time slots in a radio frame, and N1 is the first parameter.

[0207] Optionally, the first parameter is configured by the network device.

[0208] Optionally, the first sequence is detected based on a first parameter corresponding to the target PDCCH.

[0209] Optionally, the first sequence includes one or more of the following: a sequence specific to the terminal device, a sequence corresponding to a common search space of the terminal device, and a sequence corresponding to a terminal device group to which the terminal device belongs.

[0210] Optionally, a resource of the first sequence is located in a resource of one of the one or more PDCCH candidates.

[0211] Optionally, the target PDCCH includes one of the following: a PDCCH specific to the terminal device, a PDCCH corresponding to a terminal device group to which the terminal device belongs, a PDCCH scheduling common information, a PDCCH carrying a target DCI format, and a PDCCH carrying a target DCI size.

[0212] Optionally, the sending module 910 can be a transceiver 1030. The network device 900 can further include a processor 1010 and a memory 1020, as shown in FIG. 10.

[0213] FIG. 10 is a schematic structural diagram of a communication apparatus according to an embodiment of the present application. The dashed line in FIG. 10 indicates that the unit or module is optional. The apparatus 1000 can be used to implement the method described in the above method embodiments. The apparatus 1000 can be a chip, a terminal device, or a network device.

[0214] The apparatus 1000 can include one or more processors 1010. The processor 1010 can support the apparatus 1000 to implement the methods described in the foregoing method embodiments. The processor 1010 can be a general 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 processors, digital signal processors (DSPs), application specific integrated circuits (ASICs), field programmable gate arrays (FPGAs) or other programmable logic devices, discrete gates or transistor logic, discrete hardware components, etc. The general processor can be a microprocessor or the processor can also be any conventional processor.

[0215] The apparatus 1000 can also include one or more memories 1020. The memory 1020 stores a program, which can be executed by the processor 1010, so that the processor 1010 performs the methods described in the foregoing method embodiments. The memory 1020 can be independent of the processor 1010 or integrated in the processor 1010.

[0216] The apparatus 1000 can also include a transceiver 1030. The processor 1010 can communicate with other devices or chips through the transceiver 1030. For example, the processor 1010 can perform data transceiving with other devices or chips through the transceiver 1030.

[0217] 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 performed by the terminal device or the network device in the various embodiments of the present application.

[0218] 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 performed by the terminal device or the network device in the various embodiments of the present application.

[0219] The embodiments of the present application also 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 causes the computer to execute the method performed by the terminal device or the network device in the various embodiments of the present application. The embodiments of the present application also 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 causes the computer to execute the method performed by the terminal device or the network device in the various embodiments of the present application. The embodiments of the present application also 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 causes the computer to execute the method performed by the terminal device or the network device in the various embodiments of the present application.

[0220] It should be understood that the terms "system" and "network" can be used interchangeably in this application. In addition, the terms used in this application are only used to explain the specific embodiments of the application, and are not intended to limit the application. The terms "first", "second", "third", and "fourth" and the like in the specification and claims of the 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.

[0221] In embodiments of the present application, the term "indicate" can be direct indication, or indirect indication, or can represent an associated relationship. For example, A indicates B, which can mean that B can be obtained through A; or A indirectly indicates B, for example, A indicates C, and B can be obtained through C; or A and B have an associated relationship.

[0222] In 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.

[0223] In embodiments of the present application, the term "corresponding" can represent a direct or indirect corresponding relationship between the two, or can represent an associated relationship between the two, or can represent an indication and being indicated, configuration and being configured, and the like.

[0224] In embodiments of the present application, the term "include" can mean direct inclusion, or indirect inclusion. Alternatively, the term "include" mentioned in embodiments of the present application can be replaced by "indicate" or "used to determine". For example, A includes B can be replaced by A indicates B, or A is used to determine B.

[0225] In embodiments of the present application, "predefined" or "preconfigured" can be implemented by pre-saving corresponding codes, tables or other means for indicating related information in devices (such as terminal devices and network devices), and the specific implementation manner is not limited in the present application. For example, predefinition can refer to definition in a protocol.

[0226] In embodiments of the present application, the "protocol" can refer to a standard protocol in the communication field, which can include LTE protocol, NR protocol and related protocols applied in future communication systems, and the present application is not limited thereto.

[0227] 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.

[0228] 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.

[0229] In several embodiments provided by the present application, it should be understood that the disclosed system, device and method can be implemented by other means. For example, the device embodiments described above are only schematic, for example, the division of the units is only a logical function division, and actual implementation can have another division manner, 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, which can be electrical, mechanical or other forms.

[0230] The units described as separate components can or can not be physically separated, 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.

[0231] 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.

[0232] 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 (for example, floppy disk, hard disk, magnetic tape), optical media (for example, digital video disc (DVD)) or semiconductor media (for example, solid state disk (SSD)) and the like.

[0233] 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 for wireless communication, comprising: The terminal device detects a first sequence, the first sequence being used for demodulating one or more physical downlink control channel (PDCCH) candidates and being used for determining whether the one or more PDCCH candidates include a target PDCCH of the terminal device. The first sequence is generated based on a first parameter, wherein the first parameter is a terminal device-specific parameter, or the first parameter is a parameter corresponding to a group of terminal devices.

2. The method of claim 1, wherein, The first parameter includes one or more of the following:

3. The method of claim 2, wherein, a radio network temporary identifier (RNTI); related information of downlink control information (DCI) carried by the one or more PDCCH candidates. The RNTI includes one or more of the following: a terminal device-specific RNTI, an RNTI corresponding to a common search space of the terminal device.

4. The method of claim 3, wherein, The related information of the DCI includes one or more of the following: a DCI format, a DCI size.

5. The method according to claim 3 or 4, characterized in that, The first sequence is generated based on a pseudo-random sequence, the pseudo-random sequence being generated based on the first parameter.

6. The method according to any one of claims 2-5, characterized in that, N1 is the first parameter.

7. The method according to any one of claims 2-6, characterized in that, The first sequence is generated based on the following expression: where r l (m) denotes a first sequence over the symbol I, c(i) is a pseudo-random sequence, c(i) being initialized based on the first parameter.

8. The method according to claim 6 or 7, characterized in that, The pseudo-random sequence is initialized based on the following expression: wherein c init is an initialized pseudo-random sequence, N is the number of symbols in a time slot, and / is the index of the symbol within the time slot, The first parameter is configured by a network device.

9. The method according to any one of claims 2-8, characterized in that, The terminal device detects a first sequence, the first sequence being used for demodulating one or more physical downlink control channel (PDCCH) candidates and being used for determining whether the one or more PDCCH candidates include a target PDCCH of the terminal device.

10. The method according to any one of claims 2-9, characterized in that, The terminal device detects the first sequence based on a first parameter corresponding to the target PDCCH. The first sequence includes one or more of the following: a terminal device-specific sequence, a sequence corresponding to a common search space of the terminal device, a sequence corresponding to a group of terminal devices to which the terminal device belongs.

11. The method according to any one of claims 1-10, characterized in that, The resource of the first sequence is located in a resource of one of the one or more PDCCH candidates.

12. The method according to any one of claims 1-11, characterized in that, The method further includes:

13. The method according to any one of claims 1-12, characterized in that, If the one or more PDCCH candidates include the target PDCCH of the terminal device, the terminal device decodes and checks the one or more PDCCH candidates; and / or If the one or more PDCCH candidates do not include the target PDCCH of the terminal device, the terminal device skips decoding and checking the one or more PDCCH candidates. The target PDCCH includes one of the following: a terminal device-specific PDCCH, a PDCCH corresponding to a group of terminal devices to which the terminal device belongs, a PDCCH scheduling common information, a PDCCH carrying a target DCI format, and a PDCCH carrying a target DCI size.

14. The method of any one of claims 1-13, wherein, The network device sends a first sequence to a terminal device, the first sequence being used for demodulating one or more physical downlink control channel (PDCCH) candidates and being used for determining whether the one or more PDCCH candidates include a target PDCCH of the terminal device.

15. A method for wireless communication, comprising: The first sequence is generated based on a first parameter, wherein the first parameter is a terminal device-specific parameter, or the first parameter is a parameter corresponding to a group of terminal devices. The first parameter includes one or more of the following:

16. The method of claim 15, wherein, a radio network temporary identifier (RNTI); 17. The method of claim 16, wherein, related information of downlink control information (DCI) carried by the one or more PDCCH candidates. ​ ​ 18. The method of claim 17, wherein, The RNTI includes one or more of the following: a terminal device-specific RNTI, and an RNTI corresponding to a common search space of the terminal device.

19. The method of claim 17 or 18, wherein, The related information of the DCI includes one or more of the following: a DCI format and a DCI size.

20. The method of any one of claims 16-19, wherein, The first sequence is generated based on a pseudo-random sequence, and the pseudo-random sequence is generated based on the first parameter.

21. The method of any one of claims 16-20, wherein, The first sequence is generated based on the following expression: where r l (m) denotes a first sequence over the symbol I, c(i) is a pseudo-random sequence, c(i) being initialized based on the first parameter.

22. The method of claim 20 or 21, wherein, The pseudo-random sequence is initialized based on the following expression: wherein c init is an initialized pseudo-random sequence, N is the number of symbols in a time slot, / is the index of the symbol within the time slot, N1 is a number of a time slot in a radio frame, and the first parameter is N1.

23. The method of any one of claims 16-22, wherein, The first parameter is configured by a network device.

24. The method of any one of claims 16-23, wherein, The first sequence is detected based on a first parameter corresponding to the target PDCCH.

25. The method of any one of claims 15-24, wherein, The first sequence includes one or more of the following: a terminal device-specific sequence, a sequence corresponding to a common search space of the terminal device, and a sequence corresponding to a terminal device group to which the terminal device belongs.

26. The method of any one of claims 15-25, wherein, A resource of the first sequence is located in a resource of one of the one or more PDCCH candidates.

27. The method of any one of claims 15-26, wherein, The target PDCCH includes one of the following: a terminal device-specific PDCCH, a PDCCH corresponding to a terminal device group to which the terminal device belongs, a PDCCH scheduling common information, a PDCCH carrying a target DCI format, and a PDCCH carrying a target DCI size.

28. A terminal device, comprising: The method comprises: The detection module is configured to detect a first sequence, the first sequence being used for demodulating one or more physical downlink control channel (PDCCH) candidates, and the first sequence being used for determining whether the one or more PDCCH candidates include a target PDCCH of the terminal device.

29. The terminal device of claim 28, wherein, The first sequence is generated based on a first parameter, wherein the first parameter is a terminal device-specific parameter, or the first parameter is a parameter corresponding to a group of terminal devices.

30. The terminal device of claim 29, wherein, The first parameter includes one or more of the following: A radio network temporary identifier (RNTI); Related information of downlink control information (DCI) carried by the one or more PDCCH candidates.

31. The terminal device of claim 30, wherein, The RNTI includes one or more of the following: a terminal device-specific RNTI, and an RNTI corresponding to a common search space of the terminal device.

32. The terminal device according to claim 30 or 31, characterized by The related information of the DCI includes one or more of the following: a DCI format and a DCI size.

33. The terminal device of any one of claims 29-32, wherein, The first sequence is generated based on a pseudo-random sequence, and the pseudo-random sequence is generated based on the first parameter.

34. The terminal device of any one of claims 29-33, wherein, The first sequence is generated based on the following expression: where r l (m) denotes a first sequence over the symbol I, c(i) is a pseudo-random sequence, c(i) being initialized based on the first parameter.

35. The terminal device of claim 33 or 34, wherein, The pseudo-random sequence is initialized based on the following expression: wherein c init is an initialized pseudo-random sequence, N is the number of symbols in a time slot, / is the index of the symbol within the time slot, N1 is a number of a time slot in a radio frame, and the first parameter is N1.

36. The terminal device of any one of claims 29-35, wherein, The first parameter is configured by a network device.

37. The terminal device of any one of claims 29-36, wherein, The detection module is further configured to: Detect the first sequence based on a first parameter corresponding to the target PDCCH.

38. The terminal device of any one of claims 28-37, wherein, The first sequence includes one or more of the following: a terminal device-specific sequence, a sequence corresponding to a common search space of the terminal device, and a sequence corresponding to a terminal device group to which the terminal device belongs.

39. The terminal device of any one of claims 28-38, wherein, A resource of the first sequence is located in a resource of one of the one or more PDCCH candidates.

40. The terminal device of any one of claims 28-39, wherein, The terminal device further comprises an execution module configured to: decode and check the one or more PDCCH candidates if the one or more PDCCH candidates include the target PDCCH of the terminal device; and / or skip decoding and checking the one or more PDCCH candidates if the one or more PDCCH candidates do not include the target PDCCH of the terminal device.

41. The terminal device of any one of claims 28-40, wherein, The target PDCCH includes one of the following: a PDCCH specific to the terminal device, a PDCCH corresponding to a terminal device group to which the terminal device belongs, a PDCCH scheduling common information, a PDCCH carrying a target DCI format, and a PDCCH carrying a target DCI size.

42. A network device, comprising: comprises: a sending module configured to send a first sequence to a terminal device, the first sequence being used for demodulating one or more physical downlink control channel (PDCCH) candidates, and the first sequence being used for determining whether the one or more PDCCH candidates include a target PDCCH of the terminal device.

43. The network device of claim 42, wherein, The first sequence is generated based on a first parameter, wherein the first parameter is a parameter specific to the terminal device, or the first parameter is a parameter corresponding to a group of terminal devices.

44. The network device of claim 43, wherein, The first parameter includes one or more of the following: a radio network temporary identifier (RNTI); related information of downlink control information (DCI) carried by the one or more PDCCH candidates.

45. The network device of claim 44, wherein, The RNTI includes one or more of the following: an RNTI specific to the terminal device, and an RNTI corresponding to a common search space of the terminal device.

46. The network device of claim 44 or 45, wherein, The related information of the DCI includes one or more of the following: a DCI format and a DCI size.

47. The network device of any of claims 43-46, wherein, The first sequence is generated based on a pseudo-random sequence, and the pseudo-random sequence is generated based on the first parameter.

48. The network device of any of claims 43-47, wherein, The first sequence is generated based on the following expression: where r l (m) denotes a first sequence over the symbol I, c(i) is a pseudo-random sequence, c(i) being initialized based on the first parameter.

49. The network device of claim 47 or 48, wherein, The pseudo-random sequence is initialized based on the following expression: wherein c init is an initialized pseudo-random sequence, N is the number of symbols in a time slot, / is the index of the symbol within the time slot, N1 is the first parameter.

50. The network device of any of claims 43-49, wherein, The first parameter is configured by the network device.

51. The network device of any of claims 43-50, wherein, The first sequence is detected based on a first parameter corresponding to the target PDCCH.

52. The network device of any of claims 42-51, wherein, The first sequence includes one or more of the following: a sequence specific to the terminal device, a sequence corresponding to a common search space of the terminal device, and a sequence corresponding to a terminal device group to which the terminal device belongs.

53. The network device of any of claims 42-52, wherein, The resource of the first sequence is located in a resource of one of the one or more PDCCH candidates.

54. The network device of any of claims 42-53, wherein, The target PDCCH includes one of the following: a PDCCH specific to the terminal device, a PDCCH corresponding to a terminal device group to which the terminal device belongs, a PDCCH scheduling common information, a PDCCH carrying a target DCI format, and a PDCCH carrying a target DCI size.

55. A terminal device, comprising: comprises a memory for storing a program and a processor for invoking the program in the memory to enable the terminal device to perform the method of any one of claims 1-14.

56. A network device, comprising: comprises 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 of any one of claims 15-27.

57. An apparatus, comprising: comprising a processor for calling a program from a memory to cause the apparatus to perform the method of any of claims 1-14 or 15-27.

58. A chip, comprising: comprising a processor for calling a program from a memory to cause the apparatus to perform the method of any of claims 1-14 or 15-27.

59. A computer-readable storage medium, characterized in that, having stored thereon a program which causes a computer to perform the method of any of claims 1-14 or 15-27.

60. A computer program product, characterised in that, comprising a program which causes a computer to perform the method of any of claims 1-14 or 15-27.

61. A computer program, characterized in that, the computer program causing a computer to perform the method of any of claims 1-14 or 15-27.

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