Communication method and communication apparatus

Abstract

A communication method and a communication apparatus, which relate to the technical field of communications. In the communication method, a terminal device receives first information from a network device, wherein the first information comprises a configuration parameter of a first signal determined on the basis of a first sequence; and the terminal device can receive the first signal on the basis of the configuration parameter of the first signal, and if the first signal is successfully received, the terminal device receives a PDCCH associated with the first signal. The first signal generated on the basis of the first sequence is introduced, the first signal is used by the terminal device to determine whether to receive the PDCCH, the terminal device only receives the PDCCH when successfully receiving the first signal, and what the terminal device receives is the PDCCH associated with the first signal. Therefore, the terminal device can receive the PDCCH as required, which can prevent the terminal device from traversing all possible resource locations to perform PDCCH blind detection, thereby reducing the overhead incurred when the terminal device performs the PDCCH blind detection.

Description

Communication method and communication device

[0001] This application claims priority to the Chinese patent application filed with the State Intellectual Property Office of China on April 3, 2024, with application number 202410404924.1 and application name “Communication Method and Communication Device”, the entire contents of which are incorporated by reference into this application. Technical Field

[0002] The present application relates to the field of communication technology, and more specifically, to a communication method and a communication device. Background Art

[0003] The network device configures multiple resource locations for the terminal device, each of which can be used by the network device to send a physical downlink control channel (PDCCH) to the terminal device. When the network device actually sends the PDCCH, it may only send the PDCCH on some of the resource locations.

[0004] Because the terminal device is unsure of the specific resource location of the PDCCH sent by the network device, the terminal device needs to perform descrambling, rate matching, decoding, and cyclic redundancy check (CRC) on the signal transmitted at each resource location where the PDCCH may exist. If the decoding is successful, it means that the PDCCH of the terminal device exists at that resource location. If the decoding fails, it means that the PDCCH of the terminal device does not exist at that resource location. However, this results in a high overhead when the terminal device performs PDCCH blind detection. Summary of the Invention

[0005] The present application provides a communication method and a communication device, which can reduce the overhead of a terminal device when performing PDCCH blind detection.

[0006] In a first aspect, a communication method is provided, which can be applied to a network device side, such as a network device or a communication module in a network device, or a circuit or chip or chip system responsible for a communication function in a network device (such as a modem chip, also known as a baseband chip, or a system on chip (SoC) chip or system in package (SIP) chip containing a modem core). Taking the application of this method to a network device as an example, in this method, the network device is used to: send a first information, the first information includes configuration parameters of a first signal; send a first signal and a PDCCH, the first signal is determined according to a first sequence, and the first signal is used by a terminal device to determine whether to receive the PDCCH.

[0007] Different terminal devices may correspond to different sequences and thus to different signals for associating with the PDCCH. For example, a first terminal device corresponds to a first sequence, which is used to generate a first signal. The first terminal device determines whether it needs to receive the PDCCH associated with the first signal based on the detection result or reception result of the first signal. A second terminal device corresponds to a second sequence, which is used to generate a second signal. The second terminal device determines whether it needs to receive the PDCCH associated with the second signal based on the detection result or reception result of the second signal. In this way, each terminal device can correspond to a different signal for associating with the PDCCH, thereby distinguishing different terminal devices.

[0008] By introducing a first signal generated according to a first sequence, the first signal is used by the terminal device to determine whether to receive the PDCCH. The terminal device receives the PDCCH only when it successfully receives the first signal, and the terminal device receives the PDCCH associated with the first signal. This allows the terminal device to receive the PDCCH on demand, which avoids the terminal device traversing all possible resource locations for PDCCH blind detection, thereby reducing the overhead of the terminal device when performing PDCCH blind detection.

[0009] In combination with the first aspect, the method also includes: receiving second information, the second information indicating at least one of the following: whether the terminal device supports reception of PDCCH based on the first signal; whether the terminal device supports the first signal; the type of first signal supported by the terminal device; the number of types of first signals supported by the terminal device; whether the terminal device supports the association relationship between the first signal and the first resource, the first resource being at least one of the following: a control resource set, a search space, a listening opportunity, an alternative PDCCH; or, the number of first signals supported by the terminal device.

[0010] Through this design method, the terminal device can report its own information about the capabilities of the first signal to the network device, so that the network device can configure the configuration parameters of the first signal based on the terminal device's information about the capabilities of the first signal, further improving the reliability of communication.

[0011] On the second aspect, a communication method is provided, which can be applied to the terminal device side, such as the terminal device or a communication module in the terminal device, or a circuit or chip responsible for the communication function in the terminal device (such as a modem chip, also known as a baseband chip, or a SoC chip or SIP chip containing a modem core). Taking the application of this method to the terminal device as an example, in this method, the terminal device is used to: receive first information, the first information includes configuration parameters of a first signal, and the first signal is determined according to a first sequence; receive the first signal according to the configuration parameters of the first signal; if the first signal is successfully received, receive the PDCCH associated with the first signal.

[0012] Please refer to the description of the beneficial effects of the first aspect and will not be repeated here.

[0013] In combination with the second aspect, the method further includes: if the first signal corresponds to the terminal device, determining that the first signal is successfully received.

[0014] With this design, the terminal device continues to receive the PDCCH corresponding to the first signal only after receiving the first signal corresponding to itself. In this way, the terminal device receives the PDCCH associated with the first signal corresponding to itself on demand.

[0015] In combination with the second aspect, the method further includes: if reception of the first signal fails, not receiving the PDCCH associated with the first signal, or, when performing PDCCH blind detection, skipping the PDCCH associated with the first signal.

[0016] Through this design, when the terminal device receives a first signal that does not correspond to itself, it does not continue to receive the PDCCH corresponding to the first signal, which can reduce the overhead of the terminal device.

[0017] In combination with the second aspect, the method further includes: if the first signal and the terminal device do not correspond, determining that reception of the first signal fails.

[0018] In one example, after a terminal device receives a first signal sent by a network device, the terminal device performs a correlation test on the received first signal and a first signal corresponding to the terminal device (such as the first signal stored by the terminal device), and determines whether the received first signal is the first signal corresponding to the terminal device based on the correlation test result. For example, if the correlation test is successful (such as the correlation value exceeds a threshold), it indicates that the first signal received by the terminal device is the first signal corresponding to the terminal device, and the terminal device successfully receives the first signal; for example, if the correlation test fails (such as the correlation value does not exceed the threshold), it indicates that the first signal received by the terminal device is not the first signal corresponding to the terminal device, and the terminal device fails to receive the first signal.

[0019] Through this design, the terminal device does not need to continue to receive the PDCCH associated with the first signal, which can reduce the overhead of the terminal device.

[0020] In combination with the second aspect, before sending the first information, the method also includes: receiving second information, the second information indicating at least one of the following: whether the terminal device supports reception of PDCCH based on the first signal; whether the terminal device supports the first signal; the type of the first signal supported by the terminal device; the number of types of first signals supported by the terminal device; whether the terminal device supports the association relationship between the first signal and the first resource, the first resource being at least one of the following: a control resource set, a search space, a listening opportunity, an alternative PDCCH; or, the number of first signals supported by the terminal device.

[0021] Through this design, the terminal device reports its own information about the capabilities of the first signal to the network device, and the network device configures the configuration parameters of the first signal based on the information about the capabilities of the first signal of the terminal device, further improving the reliability of communication.

[0022] In combination with any one of the first and second aspects, the first signal is determined according to the first sequence, including: the first signal is determined according to one or both of a type of the first sequence and a generation parameter of the first sequence.

[0023] For example, the first signal is determined according to the type of the first sequence. In this way, different terminal devices can be associated with different types of sequences, which can support distinguishing different terminal devices.

[0024] For example, the first signal is determined according to the generation parameters of the first sequence. In this way, different terminal devices can be associated with sequences of different generation parameters, which can support distinguishing different terminal devices.

[0025] For example, the first signal is determined according to the type of the first sequence and the generation parameters of the first sequence. In this way, different terminal devices can be associated with different types of sequences and sequences with different generation parameters, which can support distinguishing different terminal devices.

[0026] In combination with any one of the first and second aspects, the type of the first sequence includes at least one of the following: an m-sequence, a gold sequence, or a Zadoff-Chu (ZC) sequence.

[0027] Through the above sequence, this can support the formation of different signals for associating PDCCH through different sequences, which is conducive to distinguishing different terminal devices.

[0028] In combination with any one of the first aspect and the second aspect, the type of the first sequence is an m-sequence or a gold sequence, and the generation parameters of the first sequence include at least one of the following: a generating polynomial, a cyclic shift amount, or a sequence initial value.

[0029] When the generation parameters of the sequence include a generator polynomial, different sequences can be constructed by adopting different generator polynomials, thereby supporting the configuration of different associated PDCCH signals for different terminal devices.

[0030] When the generation parameters of the sequence include a cyclic shift amount, different sequences can be constructed by adopting different cyclic shift amounts, thereby supporting the configuration of different associated PDCCH signals for different terminal devices.

[0031] When the sequence generation parameters include a sequence initial value, different sequences can be constructed by adopting different sequence initial values, thereby supporting the configuration of different associated PDCCH signals for different terminal devices.

[0032] In combination with any one of the first aspect and the second aspect, the type of the first sequence is a ZC sequence, and the generation parameters of the first sequence include at least one of the following: a sequence period, a cyclic shift amount, or a root index.

[0033] When the sequence generation parameters include a sequence period, different sequences can be constructed by adopting different sequence periods, thereby supporting the configuration of different associated PDCCH signals for different terminal devices.

[0034] When the generation parameters of the sequence include a cyclic shift amount, different sequences can be constructed by adopting different cyclic shift amounts, thereby supporting the configuration of different associated PDCCH signals for different terminal devices.

[0035] When the generation parameters of the sequence include a root index, different sequences can be constructed by adopting different root indexes, thereby supporting the configuration of different associated PDCCH signals for different terminal devices.

[0036] In combination with any one of the first and second aspects, the first sequence is related to a first parameter, the first parameter is used to identify the first signal, the first parameter is determined based on a cell identifier and an identifier of a terminal device, and the terminal device is located within a cell identified by the cell identifier.

[0037] In this way, by configuring different first parameters, different first sequences can be associated with different first parameters, so that corresponding PDCCH-associated signals can be generated for different terminal devices.

[0038] In combination with any one of the first aspect and the second aspect, the first parameter satisfies any one of the following: X*N1+N2, or Y*N2+N1; X is the total number of cell identifiers, Y is the total number of terminal devices in the cell, N1 is the identifier of the terminal device, and N2 is the cell identifier.

[0039] For example, when the first parameter satisfies: X*N1+N2, the network device can determine the cyclic shift amount of the terminal device based on the total number of cell identifiers, the user identifier of the terminal device, and the cell identifier. Based on the above formula, the cyclic shift amount corresponding to each terminal device is different, which can support the configuration of different signals for associating with PDCCH for different terminal devices.

[0040] For example, when the first parameter satisfies: Y*N2+N1, the network device can determine the cyclic shift amount of the terminal device based on the total number of terminal devices in the cell, the user identifier of the terminal device, and the cell identifier. Based on the above formula, when the type of sequence 1a is the same as the type of sequence 2a, and the generation parameters of each sequence include a cyclic shift amount, the cyclic shift amount corresponding to each terminal device is different, which can support the configuration of different signals for associating with PDCCH for different terminal devices.

[0041] In combination with any one of the first aspect and the second aspect, the configuration parameters of the first signal include at least one of the following: a second parameter, the second parameter is used to determine whether to enable or not enable the first signal; the type of the first signal, the type of the first signal is at least one of the following: a signal associated with a control resource set, a signal associated with a search space, a signal associated with a listening opportunity, a signal associated with an alternative PDCCH; an association relationship between the first signal and the first resource, the first resource is at least one of the following: a control resource set, a search space, a listening opportunity, an alternative PDCCH.

[0042] This design approach ensures that the behavior of network devices corresponds to that of terminal devices, thereby improving the reliability of communication between network devices and terminal devices.

[0043] In combination with any one of the first aspect and the second aspect, the first resource is associated with the PDCCH.

[0044] In this way, the PDCCH associated with the first signal may be determined according to the association between the first signal and the first resource and the association between the first resource and the PDCCH.

[0045] In a third aspect, a communication device is provided. The communication device may be a network device, or a device or module for performing the functions of a network device.

[0046] The communication device may include modules or units corresponding to the methods / operations / steps / actions described in the first aspect. The modules or units may be hardware circuits, software, or a combination of hardware circuits and software.

[0047] For example, the communication device includes a transceiver unit, which is used to send the first information; and is also used to send the first signal and PDCCH, etc.

[0048] Optionally, the communication device may further include a processing unit, which is used to determine the first information and the first signal, etc.

[0049] In a fourth aspect, a communication device is provided. The communication device may be a terminal device, or a device or module for executing the functions of the terminal device.

[0050] The communication device may include modules or units corresponding to the methods / operations / steps / actions described in the second aspect. The modules or units may be hardware circuits, software, or a combination of hardware circuits and software.

[0051] For example, the communication device includes a processing unit and a transceiver unit, the transceiver unit is used to receive first information, the first information includes configuration parameters of the first signal; the processing unit is used to receive the first signal according to the configuration parameters of the first signal; the transceiver unit, if the first signal is successfully received, receives the PDCCH associated with the first signal.

[0052] In addition, the communication device may be a terminal device or a communication module in the terminal device, or a chip in the terminal device responsible for communication functions such as a modem chip (also known as a baseband chip) or a SoC or SIP chip containing a modem module.

[0053] In a fifth aspect, a communication device is provided, comprising a processor, wherein the processor is configured to, by executing a computer program or instruction, or by a logic circuit, enable the communication device to execute the method described in the first aspect and any possible manner of the first aspect; or, enable the communication device to execute the method described in the second aspect and any possible manner of the second aspect.

[0054] In a possible implementation, the communication device further includes a memory for storing the computer program or instruction.

[0055] In a possible implementation, the communication device further includes a communication interface, which is used to input and / or output signals.

[0056] In the sixth aspect, a communication device is provided, comprising a logic circuit and an input / output interface, the input / output interface being used to input and / or output signals, the logic circuit being used to execute the method described in the first aspect and any possible manner of the first aspect; or, the logic circuit being used to execute the method described in the second aspect and any possible manner of the second aspect.

[0057] In the seventh aspect, a computer-readable storage medium is provided, on which a computer program or instruction is stored. When the computer program or the instruction is run on a computer, the method described in the first aspect and any possible method of the first aspect is executed; or, the method described in the second aspect and any possible method of the second aspect is executed.

[0058] In an eighth aspect, a computer program product is provided, comprising instructions, which, when executed on a computer, cause the method described in the first aspect and any possible manner of the first aspect to be executed; or cause the method described in the second aspect and any possible manner of the second aspect to be executed.

[0059] In the ninth aspect, a chip system is provided, comprising: a processor, which is used to execute the computer program or instructions in the memory, so that the chip system implements the method in the first aspect and any possible implementation of the first aspect; or, enables the chip system to implement the method in the second aspect and any possible implementation of the second aspect.

[0060] For the description of the beneficial effects of any of the third to ninth aspects, reference can be made to the description of the beneficial effects of the first to second aspects, and no further details will be given. BRIEF DESCRIPTION OF THE DRAWINGS

[0061] FIG1 is a schematic diagram of a communication system to which an embodiment of the present application is applicable.

[0062] FIG2 is a schematic diagram of a PDCCH configuration according to an embodiment of the present application.

[0063] FIG3 is a schematic diagram of an interaction flow of a communication method according to an embodiment of the present application.

[0064] FIG4 is a schematic diagram of different cyclic shift amounts of a ZC sequence.

[0065] FIG5 is a schematic block diagram of a communication device according to an embodiment of the present application.

[0066] FIG6 is a schematic block diagram of another communication device according to an embodiment of the present application.

[0067] FIG7 is a schematic block diagram of another communication device according to an embodiment of the present application. DETAILED DESCRIPTION

[0068] In order to facilitate understanding of the embodiments of the present application, the following points are first explained.

[0069] 1. Unless otherwise specified, “a plurality of or at least two” means two or more.

[0070] 2. Unless otherwise specified or there is no logical conflict, the terms and / or descriptions between different embodiments are consistent and can be referenced by each other. The technical features in different embodiments can be combined to form new embodiments based on their internal logical relationships.

[0071] 3. The various numerical numbers involved in the embodiments of the present application are only for the convenience of description and are not used to limit the scope of protection of the present application. The size of the serial numbers involved in the present application does not mean the order of execution. The order of execution of each process should be determined by its function and internal logic. For example, the terms "first", "second", "third", "fourth" and other various terminology labels (if any) in the specification and claims and drawings of the present application are used to distinguish similar objects and are not necessarily used to describe a specific order or sequence. Among them, the data used in this way can be interchangeable where appropriate, so that the embodiments described here can be implemented in an order other than what is illustrated or described here.

[0072] At the same time, any embodiment or design described as "exemplary" or "for example" in the embodiments of the present application should not be interpreted as being more preferred or more advantageous than other embodiments or designs. Specifically, the use of words such as "exemplary" or "for example" is intended to present the relevant concepts in a concrete manner to facilitate understanding.

[0073] 4. The terms "comprise" and "have" and any variations thereof are intended to cover non-exclusive inclusions. For example, a process, method, system, product or apparatus that includes a series of steps or units is not necessarily limited to those steps or units explicitly listed, but may include other steps or units not explicitly listed or inherent to such process, method, product or apparatus.

[0074] In the embodiments of the present application, "used to indicate" can be understood as "enabling," and "enabling" can include both direct and indirect enabling. When describing that certain information is used to enable A, it can include that the information directly enables A or indirectly enables A, and does not necessarily mean that the information contains A.

[0075] The information enabled by the information is called information to be enabled. In the specific implementation process, there are many ways to enable the enabled information, such as but not limited to, directly enabling the information to be enabled, such as the information to be enabled itself or the index of the information to be enabled. The information to be enabled can also be indirectly enabled by enabling other information, wherein there is an association between the other information and the information to be enabled. It is also possible to enable only a part of the information to be enabled, while the other parts of the information to be enabled are known or agreed in advance. For example, it is also possible to enable specific information with the help of the arrangement order of each piece of information agreed in advance (such as specified in the protocol), thereby reducing the enabling overhead to a certain extent. At the same time, it is also possible to identify the common parts of each piece of information and enable them uniformly to reduce the enabling overhead caused by enabling the same information separately.

[0076] 6. In the embodiments of the present application, "pre-configuration" may include pre-definition, such as protocol definition. "Pre-definition" may be implemented by pre-storing corresponding codes, tables, or other methods that can be used to indicate relevant information in a device (e.g., including each network element). This application does not limit the specific implementation method.

[0077] VII. "Storage" or "saving" as used in the embodiments of this application may refer to storage in one or more memories. The one or more memories may be provided separately or integrated into an encoder or decoder, a processor, or a communication device. The one or more memories may also be provided in part separately and in part integrated into a decoder, a processor, or a communication device. The type of memory may be any form of storage medium and is not limited thereto.

[0078] 8. The “protocol” involved in the embodiments of the present application may refer to a standard protocol in the field of communications, such as the fourth generation (4G) network, the fifth generation (5G) network protocol, the new radio (NR) protocol, the 5.5G network protocol, the sixth generation (6 th generation, 6G) network protocols and related protocols used in future communication systems, which are not limited in this application.

[0079] 9. The arrows or boxes indicated by dotted lines in the schematic diagrams in the accompanying drawings of this specification represent optional steps or optional modules.

[0080] 10. In the embodiments of the present application, unless otherwise specified, “ / ” indicates that the objects associated with each other are in an “or” relationship. For example, A / B can represent A or B. “And / or” in the present application is merely a description of the association relationship between associated objects, indicating that three relationships may exist. For example, A and / or B can represent: A exists alone, A and B exist at the same time, and B exists alone. A and B can be singular or plural.

[0081] 11. In the embodiments of the present application, indications include direct indications (also called explicit indications) and implicit indications. Direct indication of information A refers to including information A. Implicit indication of information A refers to indicating information A through the correspondence between information A and information B and the direct indication of information B. The correspondence between information A and information B can be predefined, pre-stored, pre-burned, or pre-configured.

[0082] 12. In the embodiments of the present application, information C is used to determine information D, which includes both information D being determined solely based on information C and information D being determined based on information C and other information. Furthermore, information C can also be used to determine information D indirectly, for example, where information D is determined based on information E, and information E is determined based on information C.

[0083] 13. In the embodiment of the present application, "device A sends information A to device B" can be understood as the destination end of the information A or the intermediate network element in the transmission path between the destination end and the device B, which may include sending information to device B directly or indirectly.

[0084] 14. In the embodiments of this application, the phrase "Device B receives information A from Device A" can be understood to mean that the source of information A or an intermediate network element in the transmission path between the source and the device A is Device A, and may include directly or indirectly receiving the information from Device A. Information may undergo necessary processing between the source and destination, such as formatting changes, but the destination can still understand the valid information from the source. Similar expressions in this application should be understood similarly and are not elaborated on here.

[0085] The technical solutions provided in this application can be applied to various communication systems, such as 5G or NR systems, long term evolution (LTE) systems, LTE frequency division duplex (FDD) systems, LTE time division duplex (TDD) systems, etc. The technical solutions provided in this application can also be applied to future communication systems, such as 6G communication systems.

[0086] The technical solution provided in this application can also be applied to device-to-device (D2D) communication, vehicle-to-everything (V2X) communication, machine-to-machine (M2M) communication, machine type communication (MTC), and Internet of Things (IoT) communication systems or other communication systems.

[0087] The terminal devices in the embodiments of the present application include various devices with wireless communication functions, which can be used to connect people, objects, machines, etc. The terminal devices can be widely used in various scenarios, such as: cellular communication, D2D, V2X, peer to peer (P2P) (referring to between devices), M2M, MTC, IoT, virtual reality (VR), augmented reality (AR), industrial control, autonomous driving, telemedicine, smart grid, smart furniture, smart office, smart wear, smart transportation, smart city drones, robots, remote sensing, passive sensing, positioning, navigation and tracking, autonomous delivery and other scenarios. Among them, the terminal device can be a device or module that is connected to the above-mentioned communication system and has corresponding communication functions. The terminal device is usually provided with a communication module, circuit or chip that performs the corresponding communication function. The terminal device is also configured with program instructions for performing the corresponding communication function.

[0088] The terminal device in the embodiments of the present application may also be referred to as user equipment (UE), terminal, user device, access terminal, user unit, user station, mobile station, mobile station (MS), remote station, remote terminal, mobile device, user terminal, terminal unit, terminal station, terminal device, wireless communication device, user agent or user device. The terminal device is generally provided with a communication module, circuit or chip that performs the corresponding communication function. The terminal device is also configured with program instructions for performing the corresponding communication function.

[0089] The terminal device in the embodiments of the present application can be a mobile phone, a personal digital assistant (PDA), a laptop computer, a tablet computer, a drone, a computer with wireless transceiver function, an MTC terminal, a VR terminal, an AR terminal, an IoT terminal, a wireless terminal in industrial control, a wireless terminal in self-driving, a wireless terminal in remote medical, a wireless terminal in a smart grid, a wireless terminal in transportation safety, a wireless terminal in a smart city, a wireless terminal in a smart home (such as a game console, a smart TV, a smart speaker, a smart refrigerator, and fitness equipment), a transport vehicle with wireless communication function, a communication module, a roadside unit (RSU) with terminal function, a fixed device, a mobile station device or a mobile device, a subscriber unit, a handheld device, a vehicle-mounted device, a wearable device, a cellular phone, a smart phone, phone), SIP phone, wireless data card, computer, tablet computer, laptop computer, wireless modem, handheld device (handset), computer with wireless transceiver function, smart book, vehicle, satellite, global positioning system (GPS) device, target tracking device, aircraft (such as drone, helicopter, multi-copter, quadcopter, or airplane, etc.), ship, remote control device, smart home device, industrial equipment, or device built into the above devices (such as communication module, modem or chip in the above devices, etc.), or other processing device connected to the wireless modem.

[0090] In some scenarios, the terminal device can also be used to act as a base station. For example, the terminal device can act as a scheduling entity, which provides sidelink signals between UEs in scenarios such as V2X, D2D, or P2P.

[0091] In the embodiments of the present application, the device for implementing the function of the terminal device can be the terminal device, or it can be a device that can support the terminal device to implement the function, such as a chip system or chip, which can be installed in the terminal device. In the embodiments of the present application, the chip system can be composed of a chip, or it can include a chip and other discrete devices.

[0092] The network device in the embodiments of the present application may be a device for communicating with a terminal device, and may also be referred to as an access network device or a radio access network device. For example, the network device may be a base station. The network device in the embodiments of the present application may refer to a radio access network (RAN) node (or device) that connects a terminal device to a wireless network. Base station can broadly cover various names as follows, or replace the following names, such as: NodeB, evolved NodeB (eNB), next generation NodeB (gNB), relay station, access point, transmission point (TRP), transmission point (TP), master station, auxiliary station, multi-standard wireless (motor slide retainer, 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 used to be set in the aforementioned device or apparatus. The base station can also be a mobile switching center and a device that performs base station functions in D2D, V2X, and M2M communications, a network-side device in a 6G network, a device that performs base station functions in future communication systems, and the like. The base station can support networks with 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. In addition, the above-mentioned network device can also be a network-side device located in the above-mentioned communication system, and a device or module having corresponding communication functions. The network device is usually provided with a communication module, circuit or chip that performs the corresponding communication function. The network device is also configured with program instructions for performing the corresponding communication function and corresponding program instructions.

[0093] Base stations can be fixed or mobile. For example, a helicopter or drone can be configured to act as a mobile base station, and one or more cells can move based on the location of the mobile base station. In other examples, a helicopter or drone can be configured to act as a device that communicates with another base station.

[0094] In the embodiments of the present application, the device for implementing the function of the network device can be the network device, or it can be a device that can support the network device to implement the function, such as a chip system or chip, which can be installed in the network device. In the embodiments of the present application, the chip system can be composed of a chip, or it can include a chip and other discrete devices.

[0095] The network equipment and terminal devices can be deployed on land, including indoors or outdoors, handheld or vehicle-mounted; they can also be deployed on water; they can also be deployed in the air on aircraft, balloons, and satellites. The embodiments of this application do not limit the scenarios in which the network equipment and terminal devices are located.

[0096] Figure 1 is a schematic diagram of a communication system applicable to an embodiment of the present application. As shown in Figure 1, the communication system includes: a radio access network (RAN) 100 and a core network (CN) 200. The RAN 100 includes at least one RAN node (such as 110a and 110b, collectively referred to as 110) and at least one terminal device (such as 120a-120j, collectively referred to as 120). The RAN 100 may also include other RAN nodes, such as wireless relay devices and / or wireless backhaul devices (not shown in Figure 1). The terminal device 120 is connected to the RAN node 110 via a wireless connection. The RAN node 110 is connected to the core network 200 via a wireless or wired connection. The core network devices in the core network 200 and the RAN node 110 in the RAN 100 can be different physical devices, or they can be the same physical device that integrates the core network logical functions and the radio access network logical functions.

[0097] The RAN 100 may be a 3GPP-related cellular system, such as a 4G or 5G mobile communication system, or a future-oriented evolutionary system (such as a 6G mobile communication system). The RAN 100 may also be an open access network (O-RAN or ORAN), a cloud RAN (CRAN), or a wireless fidelity (WiFi) system. The RAN 100 may also be a communication system that integrates two or more of the above systems.

[0098] RAN node 110, sometimes also referred to as access network equipment, RAN entity, or access node, constitutes part of a communication system and facilitates wireless access for terminal devices. Multiple RAN nodes 110 in the communication system can be of the same type or different types. In some scenarios, the roles of RAN node 110 and terminal device 120 are relative. For example, network element 120i can be a helicopter or drone configured as a mobile base station. For terminal device 120j accessing RAN 100 via network element 120i, network element 120i is a base station; however, for base station 110a, network element 120i is a terminal device. RAN node 110 and terminal 120 are sometimes referred to as communication devices. For example, network elements 110a and 110b can be understood as communication devices with base station functionality, and network elements 120a-120j can be understood as communication devices with terminal functionality.

[0099] In one possible scenario, a RAN node may be a base station (BS), eNodeB, access point (AP), TRP, gNB, a next-generation base station in a 6G mobile communication system, a base station in a future mobile communication system, or an access node in a WiFi system. A RAN node may be a macro base station (such as 110a in Figure 1 ), a micro base station or an indoor station (such as 110b in Figure 1 ), a relay node or a donor node, or a wireless controller in a CRAN scenario.

[0100] Optionally, the RAN node may also be a server, a wearable device, a vehicle or an on-board device, etc. For example, the access network device in the V2X technology may be an RSU or a base station. All or part of the functions of the RAN node in this application may also be implemented by software functions running on hardware, or by virtualization functions instantiated on a platform (such as a cloud platform). The RAN node in this application may also be a logical node, logical module or software that can implement all or part of the functions of the RAN node.

[0101] In another possible scenario, multiple RAN nodes collaborate to assist terminal devices in achieving wireless access, and different RAN nodes respectively implement part of the functions of the base station. For example, the RAN node can be a centralized unit (CU), a distributed unit (DU), a CU-control plane (CP), a CU-user plane (UP), or a radio unit (RU). The CU and DU can be set separately, or they can be included in the same network element, such as a baseband unit (BBU). The RU can be included in a radio frequency device or radio frequency unit, such as a remote radio unit (RRU), an active antenna unit (AAU), or a remote radio head (RRH).

[0102] In different communication systems, CU (or CU-CP and CU-UP), DU or RU may also have different names, but those skilled in the art can understand their meanings. For example, in an open radio access network (ORAN) system, CU may also be called O-CU (open CU), DU may also be called O-DU, CU-CP may also be called O-CU-CP, CU-UP may also be called O-CU-UP, and RU may also be called O-RU. For the convenience of description, this application takes CU, CU-CP, CU-UP, DU and RU as examples for description. Any unit of CU (or CU-CP, CU-UP), DU and RU in this application can be implemented by a software module, a hardware module, or a combination of a software module and a hardware module.

[0103] The number of devices in the above-mentioned communication system is for illustration only and is not limited thereto. In actual applications, the communication system may further include more terminal devices, more RAN devices, and other devices.

[0104] Figure 1 is a simplified schematic diagram for ease of understanding, and the communication system may also include a greater number of network devices or terminal devices. The embodiments of the present application may be applicable to any communication scenario in which a transmitting device and a receiving device communicate with each other.

[0105] The following is an explanation of some technical terms involved in the embodiments of this application:

[0106] 1. PDCCH:

[0107] In mobile communication systems, the PDCCH is used to transmit downlink control information (DCI). The signal carried on the PDCCH is called a PDCCH signal. In some embodiments, the PDCCH signal can be simply referred to as PDCCH. In other words, PDCCH can refer to the Physical Downlink Control Channel or the signal transmitted on the Physical Downlink Control Channel.

[0108] Before the network device and the terminal device transmit PDCCH, the network device needs to send PDCCH configuration (such as control resource set (CORESET) and search space (SS)) to the terminal device in order to configure the relevant parameters of PDCCH transmission for the terminal device and assist the terminal device in receiving PDCCH.

[0109] 2. CORESET:

[0110] It is mainly used to configure the frequency domain resource information of PDCCH (such as which resource blocks (RBs) are occupied) and some time domain resource information (such as how many symbols are occupied). The network equipment can configure one or more CORESETs for the terminal device. A CORESET can be associated with one or more SSs.

[0111] In some embodiments, resources configured by a CORESET (such as one or more symbols, one or more RBs, etc.) may also be referred to as a CORESET. In other words, a CORESET may be used to represent resources or to represent configuration parameters of resources.

[0112] 3. SS (or search space set):

[0113] Mainly used to configure PDCCH time domain resource information, or to configure related information for PDCCH blind detection. For example, the search space set may include: the time domain period (or blind detection period), which indicates how many time slots the SS appears once; the monitoring occasion (MO) within a slot, which indicates the possible symbol positions of the PDCCH within a slot; the PDCCH aggregation level, which indicates how many frequency domain resources are used to carry the PDCCH, and the number of PDCCH candidates for each aggregation level.

[0114] In some embodiments, the resources configured by the SS may also be referred to as the SS. In other words, the SS may be used to represent the resource or the configuration parameters of the resource.

[0115] 4. MO:

[0116] An SS includes one or more MOs. In some embodiments, the SS is indicated by the monitoringSymbolsWithinSlot parameter. The monitoringSymbolsWithinSlot parameter is a 14-bit bitmap, and each bit corresponds to an orthogonal frequency division multiplexing (OFDM) symbol. A bit value of 1 indicates that the OFDM symbol corresponding to the bit is the first OFDM symbol of an SS, that is, starting from this OFDM symbol, X consecutive OFDM symbols correspond to one MO. X is indicated by the duration parameter in CORESET, which indicates the number of time domain symbols occupied by PDCCH. For example, if the value of monitoringSymbolsWithinSlot is 10000100000000, and the value of duration in the associated CORESET is 3, then the search space has two MOs, the first one is located at the 1st to 3rd OFDM symbols, and the second one is located at the 6th to 8th OFDM symbols.

[0117] 5. Alternative PDCCH (or potential PDCCH):

[0118] It refers to the resource location where the network device can send a PDCCH, that is, a resource location where a PDCCH may exist is called an alternative PDCCH. The network device may send a PDCCH on an alternative PDCCH, or it may not send a PDCCH. The alternative PDCCH can be configured according to the aggregation level of the set. For example, the network device configures 2 alternative PDCCHs with an aggregation level of 4 and 4 alternative PDCCHs with an aggregation level of 8 for the terminal device. The terminal device will perform blind detection on the 2 alternative PDCCHs with an aggregation level of 4 and the 4 alternative PDCCHs with an aggregation level of 8. The network device configures the alternative PDCCH to control the number of blind detections for each aggregation level, thereby controlling the complexity of the PDCCH blind detection. The time-frequency position of the alternative PDCCH for each specific aggregation level is calculated according to a specific formula. The terminal device can determine the time-frequency position of the alternative PDCCH for each specific aggregation level, and thus perform PDCCH reception at that resource position.

[0119] The terms CORESET, SS, MO and alternative PDCCH in this application are for the convenience of description and are not limited to the literal meaning. For example, CORESET can refer to the configuration parameters of PDCCH frequency domain information, and can be replaced by any other term that characterizes PDCCH frequency domain information. For example, SS can refer to the configuration parameters of PDCCH time domain information or PDCCH blind detection information, and can be replaced by any other term that characterizes PDCCH time domain information or PDCCH blind detection information. For example, MO can refer to the configuration parameters of the time domain position of PDCCH in a time slot, and can be replaced by any other term that characterizes the time domain position of PDCCH in a time slot. For example, alternative PDCCH can refer to the configuration parameters of the resource location where PDCCH may exist, and can be replaced by any other term that characterizes the resource location where PDCCH may exist.

[0120] The CORESET and its associated SS can be combined to determine all possible resource locations of the PDCCH, and the terminal device performs blind detection of the PDCCH at these resource locations.

[0121] 4. PDCCH blind detection:

[0122] This refers to the process whereby a terminal device attempts to receive a PDCCH at each resource location where a PDCCH may exist (i.e., each candidate PDCCH) using a blind test method. Blind detection involves the terminal device traversing each candidate PDCCH and determining whether the PDCCH of the terminal device exists at the resource location corresponding to each candidate PDCCH. It is understood that the network equipment has pre-configured the candidate PDCCHs that the terminal device traverses.

[0123] Figure 2 is a schematic diagram of the PDCCH configuration of an embodiment of the present application. As shown in Figure 2, the network device configures a control resource set for the terminal device, which is associated with two SS1 and SS2. SS1 is configured with three listening opportunities (MO1, MO2, MO3), and SS2 is configured with four listening opportunities (MO1, MO2, MO3, MO4). There are two alternative PDCCHs on each MO. Therefore, there are actually 3x2=6 alternative PDCCHs in SS1 and 4x2=8 alternative PDCCHs in SS2.

[0124] When receiving a PDCCH, a terminal device sequentially traverses the signals of each candidate PDCCH in each MO for reception processing, such as descrambling, rate matching, decoding, CRC check, etc. If the decoding is successful, it means that the PDCCH of the terminal device is indeed present on the MO. If the decoding fails, it means that the PDCCH of the terminal device is not present on the MO. According to the example given in Figure 2, the terminal device needs to traverse 14 candidate PDCCHs to detect the PDCCH, which will result in a large overhead for the terminal device.

[0125] In view of this, the present application provides a communication method and a communication device that can reduce the overhead of a terminal device when performing PDCCH blind detection.

[0126] The communication method according to the embodiment of the present application is described below with reference to the accompanying drawings.

[0127] For ease of understanding and explanation, the communication method of the embodiment of the present application is described below using the interaction between a network device and a terminal device as an example, but this should not constitute any limitation on the execution subject of the communication method of the embodiment of the present application. For example, the method executed by a device (such as a network device and / or a terminal device) may also be executed by a module (such as a circuit, a chip, or a chip system) in the device, and may also be implemented by a logical node, a logical module, or software that can implement all or part of the functions of the device.

[0128] FIG3 is a schematic diagram of an interaction flow of a communication method according to an embodiment of the present application. As shown in FIG3 , the method includes:

[0129] S301: A network device sends information 1 (such as first information) to a terminal device. Correspondingly, the terminal device receives the information 1.

[0130] When the network device is implemented through multiple RAN nodes, for example, when the network device is a network device in an ORAN system, the network device sends information 1, which can be one of the O-CU, O-DU and O-RU sending information 1, or multiple of the O-CU, O-DU and O-RU jointly sending information 1.

[0131] Information 1 includes configuration parameters of signal 1 (e.g., a first signal). Signal 1 is determined based on sequence 1 (e.g., a first sequence). Signal 1 is used by a terminal device to determine whether to receive PDCCH 1. PDCCH 1 is a PDCCH associated with signal 1, or PDCCH 1 is a PDCCH corresponding to the terminal device.

[0132] In some examples, the network device may configure a corresponding signal for associating with the PDCCH for each terminal device. For example, the network device configures signal 1a for terminal device 1, signal 1a is associated with PDCCH 1a, and terminal device 1 can determine whether to receive PDCCH 1a based on signal 1a; the network device configures signal 2a for terminal device 2, signal 2a is associated with PDCCH 2a, and terminal device 2 can determine whether to receive PDCCH 2a based on signal 2a; the network device configures signal 3a for terminal device 3, signal 3a is associated with PDCCH 1 signal 3a, and terminal device 3 can determine whether to receive PDCCH 3a based on signal 3a. Among them, signal 1a, signal 2a, and signal 3a are different signals.

[0133] In some examples, the difference in the signals is reflected in the difference in the sequences carried by the signals. The difference in the sequences carried by the signals may include two dimensions: the type of sequence and the generation parameters of the sequence.

[0134] For example, signal 1a carries sequence 1a, signal 2a carries sequence 2a, and sequence 1a is different from sequence 2a, which may include: the type of sequence 1a is different from the type of sequence 2a, or the generation parameters of sequence 1a are different from the generation parameters of sequence 2a, etc.

[0135] In a possible embodiment, the signal 1 is determined according to the sequence 1, including: the signal 1 is determined according to one or both of a type parameter of the sequence 1 and a generation parameter of the sequence 1.

[0136] Example 1: Signal 1 is determined from the type parameter of Sequence 1.

[0137] For example, sequence 1a is of type 1, and sequence 2a is of type 2, which are different. Network equipment can generate different signals based on different sequence types, which can support configuring a corresponding signal for associating with the PDCCH for each terminal device. In this way, different terminal devices can be associated with different types of sequences, which can support differentiating different terminal devices.

[0138] Example 2: Signal 1 is determined based on the generation parameters of Sequence 1.

[0139] For example, the generation parameter for sequence 1a is generation parameter 1a, and the generation parameter for sequence 2a is generation parameter 2a, where generation parameter 1a is different from generation parameter 2a. A network device can generate different signals based on different generation parameters, which can support configuring a corresponding signal for associating with the PDCCH for each terminal device. In this way, different terminal devices can be associated with sequences with different generation parameters, which can support distinguishing different terminal devices.

[0140] Example 3: Signal 1 is determined based on the type parameter of sequence 1 and the generation parameter of sequence 1.

[0141] For example, the type of sequence 1a is type 1, and the generation parameter of sequence 1a is generation parameter 1a. The type of sequence 2a is type 2, and the generation parameter of sequence 2a is generation parameter 2a. Type 1 and type 2 may be different or the same, and generation parameter 1a may be different from generation parameter 2a. In this way, different terminal devices can be associated with different types of sequences and sequences with different generation parameters, which can support distinguishing different terminal devices.

[0142] This is further described below.

[0143] Consider angle #1:

[0144] The type of sequence 1a is different from the type of sequence 2a.

[0145] When the type of sequence 1a is different from the type of sequence 2a, the type of sequence 1a can be any of the following:

[0146] m-sequence, Golay complementary pairs (GCP), ZC sequence, interleaved ZC sequence, frequency-divided ZC sequence, or gold sequence (also called gold sequence).

[0147] m-sequence is the abbreviation of maximum length linear shift register sequence. Assuming that the number of stages of the linear shift register is r (a positive integer), the length of the m-sequence is 2 r Assumption 2 r Equal to 128, then r=7.

[0148] The generating polynomial of the linear shift register that generates the m sequence is required to be primitive. For example, if r = 7, g(x) = x 7 +x 4 +1 is a primitive polynomial. When r = 7, there are 18 optional primitive polynomials. When r = 8, there are 16 optional primitive polynomials.

[0149] Gold sequences are constructed by adding m-sequence pairs modulo 2. A m-sequence pair is two m-sequences of the same length (i.e., the same r) but with different primitive polynomials. These two m-sequences may also have the same initial value. Each m-sequence pair can generate 2 r +1 gold sequence.

[0150] Similar to the m sequence, the gold sequence is also periodic with a period of 2 r .

[0151] Gray complementary pair sequence is a binary sequence. and Two M's GCP Long sequence, and ak,bk∈{-1,1}, When a and b satisfy formula (1), a and b are a Golay complementary sequence pair:

[0152] Sequence length M in GCP GCP Subject to restrictions, satisfying:

[0153] Among them, α1, α2 and α3 are all non-negative integers.

[0154] The generation method of the ZC sequence is shown in formula (4).

[0155] Among them, the root index u and the period N of the ZC sequence ZC Mutually prime, N ZC Is an odd number. M ZC is the length of the ZC sequence.

[0156] The generation method of interleaved ZC is shown in formula (4):

[0157] in, Indicates rounding down, u and N ZC / 2 are mutually prime, N ZC is an even number, M ZC is also an even number. Combining formula (4), we can find and are conjugate to each other. The period of the interleaved ZC sequence is N ZC .

[0158] The frequency division ZC sequence is a sequence formed by connecting two or more ZC sequences in series. For example, a sequence with a length of N is designed according to formula (5). ZC (N ZC is an even number) can be ZC sequence 1 (length N ZC / 2, the root index is u1 (u1 and N ZC / 2 are mutually prime)) and ZC sequence 2 (length N ZC / 2, the root index is u2 (u2 and N ZC / 2 are mutually prime))) in series.

[0159] Among them, the period of the frequency-divided ZC sequence is N ZC .

[0160] In one possible implementation, the type of sequence 1a is different from the type of sequence 2a, including any of the following:

[0161] Sequence 1a is the m sequence, and sequence 2a is the gold sequence;

[0162] Sequence 1a is an m-sequence, and sequence 2a is a Golay complementary sequence;

[0163] Sequence 1a is an m-sequence, and sequence 2a is an interleaved ZC sequence;

[0164] Sequence 1a is an m-sequence, and sequence 2a is a frequency-division ZC sequence;

[0165] Sequence 1a is the gold sequence, and sequence 2a is the Golay complementary sequence.

[0166] Sequence 1a is a gold sequence, and sequence 2a is an interleaved ZC sequence; or,

[0167] Sequence 1a is a gold sequence, and sequence 2a is a frequency-division ZC sequence.

[0168] By combining the sequence types listed above, different signals 1 can be configured for different terminal devices.

[0169] For each of the sequences listed above, there are corresponding generation parameters.

[0170] Consider perspective #2:

[0171] The generation parameter configuration values ​​of sequence 1a are different from the generation parameter configuration values ​​of sequence 2a.

[0172] For example, the type of sequence 1a and the type of sequence 2a are the same, and both are ZC sequences or interleaved ZC sequences. The generation parameters of sequence 1a and sequence 2a each include at least one of the following:

[0173] Sequence period, cyclic shift amount, or root index.

[0174] In the embodiment of the present application, the type of sequence 1a is the same as that of sequence 2a, and the generation parameters of sequence 1a are different from the generation parameters of sequence 2a, which may include but are not limited to:

[0175] Sequence period (ie N ZC ) are different, the root index is the same, and the cyclic shift amount is the same;

[0176] The sequence periods are different, the root index is the same, and the cyclic shift amounts are different;

[0177] The sequence periods are different, the root indices are different, and the cyclic shift amounts are the same;

[0178] The sequence period is different, the root index is different, and the cyclic shift amount is different;

[0179] The sequence period is the same, the root index is different, and the cyclic shift amount is the same;

[0180] The sequence period is the same, but the root index is different and the cyclic shift amount is different;

[0181] The sequence period and root index are the same, but the cyclic shift amounts are different;

[0182] For example, taking the sequence type as ZC sequence and the sequence generation parameters including the sequence period as an example, assuming that the sequence lengths M carried by signal 1a and signal 2a are ZCBoth are 144 (corresponding to 12 physical resource blocks), and the sequence period N of sequence 1a is ZC is 127, the sequence period N of sequence 2a ZC It is 137.

[0183] By setting different sequence periods, different sequences can be constructed, and different signals 1 can be configured for different terminal devices.

[0184] For example, taking the sequence type as a ZC sequence (sequence length is 127) and the sequence generation parameters including a root index as an example, the root index of sequence 1a is different from the root index of sequence 2a, for example, the root index of sequence 1a is 44, and the root index of sequence 2a is 85.

[0185] By setting different root indexes, different sequences can be constructed, and different signals 1 can be configured for different terminal devices.

[0186] For example, taking the example where the sequence generation parameters include a cyclic shift, sequence 1a and sequence 2a correspond to different cyclic shifts of a base sequence (also referred to as a mother sequence). For example, the mother sequence may be an interleaved ZC sequence with a sequence period of 126 and a root index of 20. In this case, the cyclic shift of sequence 1a may be 43, while the cyclic shift of sequence 2a may be 86. Alternatively, the cyclic shift of sequence 1a may be 0, while the cyclic shift of sequence 2a may be 43. Alternatively, the cyclic shift of sequence 1a may be 0, while the cyclic shift of sequence 2a may be 86. Furthermore, the cyclic shift of sequence 1a may be 0, while the cyclic shift of sequence 2a may be 86. Furthermore, the cyclic shift of sequence 1a may be 0, while the cyclic shift of sequence 2a may be 86. The above examples are not limited to the above examples.

[0187] For further description of the ZC sequence, please refer to the existing protocol and will not be repeated here.

[0188] The following describes the scenario of cyclic shift of the ZC sequence with reference to FIG4 .

[0189] Figure 4 is a schematic diagram of different cyclic shift amounts of a ZC sequence. As shown in Figure 4, a ZC sequence is {X1(9), X1(8), X1(7), X1(6), X1(5), X1(4), X1(3), X1(2), X1(1), X1(0)}, and sequence 1a and sequence 2a are determined based on the ZC sequence.

[0190] For example, the cyclic shift amount of sequence 1a = 3, and sequence 1a is {X1(2), X1(1), X1(0), X1(9), X1(8), X1(7), X1(6), X1(5), X1(4), X1(3)}.

[0191] For example, the cyclic shift amount of sequence 2a is equal to 6, and sequence 2a is {X1(5), X1(4), X1(3), X1(2), X1(1), X1(0), X1(9), X1(8), X1(7), X1(6)}.

[0192] In a possible embodiment, cyclic shift amount = i*s, i∈{0,1,…,N 信号1 -1}, N 信号1 Indicates the maximum number of different signals (signals associated with PDCCH). Among them, s can be combined with the period of the base sequence (N ZC ) and N 信号1 related.

[0193] for example, or Indicates rounding down. Indicates rounding up. For example, N ZC =127, N 信号1 =3, s=42 or 43; for example, N ZC =511, N 信号1 =3, s=170 or 171.

[0194] In this way, by performing different cyclic shifts on the base sequence (or mother sequence), different sequences can be constructed, thereby supporting the configuration of different associated PDCCH signals for different terminal devices.

[0195] For example, sequence 1a and sequence 2a are both frequency-division ZC sequences, and the generation parameters of sequence 1a and sequence 2a each include at least one of the following:

[0196] Sequence period, root index, cyclic shift amount, or root index pair.

[0197] In the embodiment of the present application, the type of sequence 1a is the same as that of sequence 2a, and the generation parameters of sequence 1a are different from the generation parameters of sequence 2a, which may include but are not limited to:

[0198] Sequence period (ie N ZC ) are different, the root index pairs are the same, and the cyclic shift amounts are the same;

[0199] The sequence periods are different, the root index pairs are the same, and the cyclic shift amounts are different;

[0200] The sequence periods are different, the root index pairs are different, and the cyclic shift amounts are the same;

[0201] The sequence periods are different, the root index pairs are different, and the cyclic shift amounts are different;

[0202] The sequence period is the same, the root index pairs are different, and the cyclic shift amount is the same;

[0203] The sequence period is the same, the root index pairs are different, and the cyclic shift amounts are different; or,

[0204] The sequence period and root index pairs are the same, but the cyclic shift amounts are different;

[0205] It can be seen that the difference between this embodiment and the case where the sequence type is a ZC sequence or an interleaved ZC sequence lies in the root index pair.

[0206] For example, taking the generation parameters of sequence 1a and sequence 2a including a root index pair as an example, the root index pair of sequence 1a is different from the root index pair of sequence 2. For example, the root index pair of sequence 1a is {44, 85}, and the root index pair of sequence 2a is {33, 56}.

[0207] When the generation parameters of the sequence include a root index pair, different sequences can be constructed by setting different root index pairs, thereby supporting the configuration of different associated PDCCH signals for different terminal devices.

[0208] For example, the type of sequence 1a and the type of sequence 2a are the same, and both are m-sequences, Golay complementary pair sequences, or gold sequences. The generation parameters of sequence 1a and sequence 2a each include at least one of the following:

[0209] Generator polynomial, cyclic shift amount, or sequence initial value.

[0210] In the embodiment of the present application, the type of sequence 1a is the same as that of sequence 2a, and the generation parameters of sequence 1a are different from the generation parameters of sequence 2a, which may include but are not limited to:

[0211] The generating polynomial is the same, the initial value of the sequence is different, and the cyclic shift amount is the same;

[0212] The generating polynomial is the same, but the initial value of the sequence is different and the cyclic shift amount is different;

[0213] The generating polynomials are different, the initial values ​​of the sequences are the same, and the cyclic shift amounts are the same;

[0214] The generating polynomials are different, the initial values ​​of the sequences are the same, but the cyclic shift amounts are different;

[0215] The generating polynomial and sequence initial values ​​are different, but the cyclic shift amount is the same;

[0216] The generator polynomial, sequence initial value, and cyclic shift amount are all different; or,

[0217] The generator polynomial and sequence initial value are the same, but the cyclic shift amounts are different.

[0218] If the type of sequence 1a is an m sequence or a gold sequence, as mentioned above, the sequence is periodic with a period of 2 r If there are two m sequences (or two gold sequences), denoted as sequence 1aa and sequence 2aa, if the generating polynomials of sequence 1aa and sequence 2aa are the same and the sequence length is 2 r -1, but with different initial values, sequence 1aa can be considered a cyclic shift of sequence 2aa. That is, under certain initial value and cyclic shift designs, "same generator polynomial, different sequence initial values, and different cyclic shifts" may be equivalent to "same generator polynomial and sequence initial values, but different cyclic shifts."

[0219] For example, the generation parameters of the sequence include a generating polynomial, and the order r is equal to 7. The generating polynomial of sequence 1a is different from the generating polynomial of sequence 2a. For example, the generating polynomial of sequence 1a is x 7 +x 4 +1, the generating polynomial of sequence 2a is x 7 +x+1.

[0220] When the generation parameters of the sequence include a generator polynomial, different sequences can be constructed by adopting different generator polynomials, thereby supporting the configuration of different associated PDCCH signals for different terminal devices.

[0221] In a possible embodiment, sequence 1 is associated with parameter 1 (such as a first parameter), parameter 1 is used to identify signal 1, and parameter 1 is determined based on a cell identifier and an identifier of the terminal device, and the terminal device is located within a cell identified by the cell identifier.

[0222] For example, the network device configures a parameter for each terminal device to identify a signal associated with the PDCCH. For example, the network device configures parameter 1a for terminal device 1, and parameter 1a is associated with signal 1a. The network device configures parameter 2a for terminal device 2, and parameter 2a is associated with signal 2a. The network device configures parameter 3a for terminal device 3, and parameter 3a is associated with signal 3a. Accordingly, the network device can determine signal 1a based on parameter 1a, determine signal 2a based on parameter 2a, and determine signal 3a based on parameter 3a. In this way, the network device can configure corresponding PDCCH-associated signals for different terminal devices based on different parameters.

[0223] In one possible implementation, parameter 1 satisfies any of the following conditions:

[0224] X*N1+N2, or Y*N2+N1;

[0225] X is the total number of cell identifiers, Y is the total number of terminal devices in the cell, and Y is related to N1, for example, N1=N 无线网络临时标识符(radio Network temporary identity (RNTI) mod Y, where mod represents a remainder operation. N1 is the terminal device identifier, and N2 is the cell identifier.

[0226] For example, when parameter 1 satisfies: X*N1+N2, the network device can determine the cyclic shift amount of the terminal device based on the total number of cell identifiers, the terminal device identifier, and the cell identifier. Based on the above formula, the cyclic shift amount corresponding to each terminal device is different, which can support the configuration of different signals for associating with PDCCH for different terminal devices.

[0227] For example, when parameter 1 satisfies: Y*N2+N1, the network device can determine the cyclic shift amount of the terminal device based on the total number of terminal devices in the cell, the identifier of the terminal device, and the cell identifier. Based on the above formula, when the type of sequence 1a is the same as the type of sequence 2a, and the generation parameters of each sequence include a cyclic shift amount, the cyclic shift amount corresponding to each terminal device is different, which can support the configuration of different signals for associating with PDCCH for different terminal devices.

[0228] The above content is described using parameter 1 as the cyclic shift amount as an example, but parameter 1 may also be a parameter such as a sequence period. Please refer to the above description of the sequence generation parameters and will not be repeated here.

[0229] It should be noted that X does not need to be equal to the total number of cell IDs; it can be the number of cell groups. For example, if the total number of cells is divided into three groups, interference between each group is minimal, so the signals can be consistent. Then, X = total number of cell IDs / 3. Furthermore, the protocol may specify that each term be multiplied by an additional coefficient or have an additional offset. The protocol may use coefficient values ​​such as a*X*N1+b*N2+c, or a*Y*N2+b*N1+c, etc.

[0230] In this way, by configuring different parameters 1, it is advantageous to associate different sequences 1 according to different parameters 1, so that corresponding signals for associating with PDCCH can be generated for different terminal devices.

[0231] In an embodiment of the present application, information 1 includes configuration parameters of signal 1; or, information 1 includes configuration parameters, and the configuration parameters are used to configure signal 1; or, information 1 includes configuration parameters, and the configuration parameters are used to configure the association between signal 1 and PDCCH1, and so on.

[0232] In the embodiment of the present application, signal 1 is used by the terminal device to determine whether to receive PDCCH1, including but not limited to:

[0233] 1) Signal 1 is used to determine (or indicate) whether PDCCH1 exists;

[0234] 2) Signal 1 is used by the terminal device to determine (or judge) whether there is a PDCCH1 sent to the terminal device;

[0235] 3) Signal 1 is used to determine (or indicate) whether the network device has sent PDCCH1;

[0236] 4) Signal 1 is used by the terminal device to determine (or judge) whether the network device has sent PDCCH1 to the terminal device;

[0237] 5) Signal 1 is used to determine (or indicate) which resource locations PDCCH1 is sent;

[0238] 6) Signal 1 is used by the terminal device to determine (or judge) at which resource locations the network device sent PDCCH1 to the terminal device;

[0239] 7) Signal 1 is used to indicate whether the terminal device needs to perform PDCCH detection;

[0240] 8) Signal 1 is used to indicate at which resource locations (such as the resource locations associated with Signal 1) the terminal device needs to perform PDCCH detection;

[0241] 9) Signal 1 is used by the terminal device to discover the transmission of PDCCH1, and so on.

[0242] In one possible design, the name of signal 1 may be a control discovery signal (CDS), indicating that it can be used by a terminal device to discover PDCCH1. The name of signal 1 may be a control detection signal (CDS), indicating that it can be used by a terminal device to detect PDCCH1. Of course, this is only an example, and the embodiments of the present application do not limit the specific name of signal 1.

[0243] In one possible design, signal 1 may be a reference signal sent on the PDCCH, such as a demodulation reference signal (DMRS). In this way, there is no need to design a new signal type, thus saving system resources.

[0244] In one possible design, signal 1 can be a user-level (or terminal device-level) signal. Exemplarily, signal 1 can be a sequence (e.g., a CDS sequence). A user can correspond to one sequence or multiple different sequences. Optionally, different users correspond to different sequences. Optionally, different users can correspond to the same sequence. For example, if multiple terminal devices belong to the same user group, all users in the user group can correspond to the same sequence. Optionally, the terminal device can store signal 1 corresponding to the user of the terminal device.

[0245] In one possible implementation, the configuration parameters of Signal 1 sent by the network device to different terminal devices may be different. For example, the information sent by the network device to each terminal device only includes the configuration parameters of Signal 1 corresponding to that terminal device. For example, the information sent by the network device to a first terminal device includes the configuration parameters of the signal corresponding to the first terminal device, and the information sent by the network device to a second terminal device includes the configuration parameters of the first signal corresponding to the second terminal device.

[0246] Taking the configuration parameters of signal 1 as an example, Table 1 shows the configuration parameters of signal 1 sent by the network device to the first terminal device, and Tables 1 and 2 show the configuration parameters of signal 1 sent by the network device to the second terminal device. The signal 1 corresponding to the first terminal device is CDS-1, and the configuration parameters of CDS-1 are A1, B1, and C1. The signal 1 corresponding to the second terminal device is CDS-2, and the configuration parameters of CDS-2 are A2, B2, and C2.

[0247] Table 1

[0248] Table 2

[0249] Table 1 and Table 2 are only used to illustrate that the configuration parameters of signal 1 sent by the network device to different terminal devices may be different. The embodiment of the present application does not limit the specific form of the configuration parameters of signal 1.

[0250] In another possible implementation, the configuration parameters of the signal 1 sent by the network device to different terminal devices may be the same. For example, the information 1 sent by the network device to each of the multiple terminal devices includes the configuration parameters of the signal 1 corresponding to the multiple terminal devices. After receiving the information 1, each terminal device determines the configuration parameters of the signal 1 corresponding to the terminal device from the configuration parameters of the signal 1 corresponding to the multiple terminal devices. For example, the information 1 sent by the network device to the first terminal device and the second terminal device includes the configuration parameters of the signal 1 corresponding to the first terminal device and the configuration parameters of the signal 1 corresponding to the second terminal device. After receiving the information 1, the first terminal device determines the configuration parameters of the signal 1 corresponding to the first terminal device from the information 1. After receiving the information 1, the second terminal device determines the configuration parameters of the signal 1 corresponding to the second terminal device from the information 1. It can be understood that, in addition to the configuration parameters of the signal 1 corresponding to the terminal device, the information 1 may also include the configuration parameters of the signal 1 corresponding to other terminal devices.

[0251] Taking the configuration parameters of signal 1 represented by a table as an example, Table 3 represents the configuration parameters of signal 1 sent by the network device to the first terminal device and the second terminal device. A row in the table corresponds to a configuration parameter of signal 1, where the signal 1 corresponding to the first terminal device is CDS-1, and the configuration parameters of CDS-1 are A1, B1, and C1. The signal 1 corresponding to the second terminal device is CDS-2, and the configuration parameters of CDS-2 are A2, B2, and C2.

[0252] Table 3

[0253] Table 3 is only used to illustrate that the configuration parameters of signal 1 sent by the network device to different terminal devices can be the same. The embodiment of the present application does not limit the specific form of the configuration parameters of signal 1.

[0254] A terminal device may correspond to one or more different signals 1. When the terminal device corresponds to one signal 1, information 1 includes configuration parameters corresponding to the one signal 1; when the terminal device corresponds to multiple signals 1, information 1 includes configuration parameters corresponding to each of the multiple signals 1. It is understood that information 1 may include configuration parameters for one or more signals 1 corresponding to the terminal device.

[0255] Taking the configuration parameters of signal 1 represented by a table as an example, Table 4 represents the configuration parameters of signal 1 sent by the network device to the first terminal device. The signal 1 corresponding to the first terminal device includes CDS-1 and CDS-3. The configuration parameters of CDS-1 are A1, B1, and C1, and the configuration parameters of CDS-3 are A3, B3, and C3.

[0256] Table 4

[0257] Table 4 is only used to illustrate the configuration parameters of multiple signals 1 that the network device can send to the same terminal device. The embodiment of the present application does not limit the specific form of the configuration parameters of signal 1.

[0258] In a possible embodiment, the configuration parameters of signal 1 include one or more of the following:

[0259] 1. Parameter 2 (eg, a second parameter): Parameter 2 is used to determine (or indicate) whether to enable or disable signal 1; in other words, parameter 2 is used to determine (or indicate) whether to perform PDCCH reception according to signal 1.

[0260] When parameter 2 indicates that signal 1 is to be started, the terminal device needs to receive signal 1 first and then receive PDCCH1 (as shown in step S302 below); when parameter 2 indicates that signal 1 is not to be enabled, the terminal device may not receive PDCCH1, or the terminal device may not receive PDCCH1 based on signal 1, for example, PDCCH blind detection may be used to receive PDCCH1.

[0261] Parameter 2 can be implemented in many ways. The following are some possible implementations:

[0262] Mode 1 and parameter 2 have two values, indicating whether signal 1 is enabled or disabled. For example, if parameter 2 is a bit, when the bit is 0, signal 1 is enabled, and when the bit is 1, signal 1 is disabled; or, when the bit is 1, signal 1 is enabled, and when the bit is 0, signal 1 is disabled.

[0263] Mode 2 and parameter 2 have only one value, which means signal 1 is enabled. In other words, as long as parameter 2 is included in the configuration parameters, signal 1 is enabled. If parameter 2 is not included in the configuration parameters, signal 1 is disabled by default.

[0264] In mode 3, parameter 2 has only one value, which means that signal 1 is not enabled. In other words, when parameter 2 is not configured or parameter 2 in the configuration parameters is empty, signal 1 is enabled by default; when parameter 2 is configured, signal 1 is disabled.

[0265] The above three implementation methods are only examples and are not limited thereto.

[0266] 2. Type of signal 1.

[0267] The type of the first signal 1 refers to the type of signal 1 used by the network device and / or the type of signal 1 that the terminal device is allowed to use.

[0268] In a possible embodiment, the type of signal 1 is distinguished according to the type of resource 1 associated with signal 1. The type of signal 1 includes but is not limited to one or more of the following:

[0269] A. CORESET-associated signal: The terminal device receives PDCCH1 in the CORESET associated with signal 1.

[0270] B. SS-associated signals: The terminal device receives PDCCH1 in the SS associated with signal 1.

[0271] C. MO-associated signal: The terminal device receives PDCCH1 in the MO associated with signal 1.

[0272] D. Signal associated with the candidate PDCCH: The terminal device receives PDCCH1 in the candidate PDCCH associated with signal 1.

[0273] Of course, the above are just a few examples and are not limited to these.

[0274] In a possible example, a standard, protocol, or system specifies the type of signal 1 , and the network device indicates in a configuration parameter whether to use the type of signal 1 specified by the standard, protocol, or system.

[0275] Taking the case where the type of signal 1 is a CORESET-associated signal as an example, the content is also applicable to the scenario where the type of signal 1 is an SS-associated signal, an MO-associated signal, or an alternative PDCCH-associated signal. Exemplarily, the standard stipulates that the type of signal 1 is a CORESET-associated signal, and the network device carries a bit in the configuration parameters of signal 1 to indicate whether the CORESET-associated signal is adopted. For example, if the bit is 0, it indicates that the CORESET-associated signal is adopted, and if the bit is 1, it indicates that the CORESET-associated signal is not adopted; or, if the bit is 1, it indicates that the CORESET-associated signal is adopted, and if the bit is 0, it indicates that the CORESET-associated signal is not adopted; or, if the configuration parameters of signal 1 carry the bit, it indicates that the CORESET-associated signal is adopted, and if the configuration parameters of signal 1 do not carry the bit, it indicates that the CORESET-associated signal is not adopted; or, if the configuration parameters of signal 1 do not carry the bit, it indicates that the CORESET-associated signal is adopted, and if the configuration parameters of signal 1 carry the bit, it indicates that the CORESET-associated signal is not adopted.

[0276] In another possible example, the network device carries an identifier of the type of signal 1 used in the configuration parameters of signal 1, for example, per CORESET CDS, per Search Space CDS, per Monitoring occasion CDS, and per PDCCH candidate CDS respectively represent CORESET-associated signals, SS-associated signals, MO-associated signals, and alternative PDCCH-associated signals.

[0277] In another possible example, the network device carries a bitmap in the configuration parameters of signal 1. Each bit of the bitmap corresponds to a type of signal 1, and the value of each bit is used to indicate whether the type of signal 1 corresponding to the bit is adopted. Taking the bitmap as an example, the bitmap includes 4 bits. From the 1st to the 4th bit, they correspond to the CORESET-associated signal, the SS-associated signal, the MO-associated signal, and the alternative PDCCH-associated signal, respectively. The bit value of 1 indicates adoption, and the value of 0 indicates non-adoption. For example, the bitmap is "1100", indicating that the type of signal 1 adopted is the CORESET-associated signal and the MO-associated signal.

[0278] Of course, the above are just some examples and are not limited to these.

[0279] 3. The association relationship between signal 1 and resource 1 (such as the first resource).

[0280] Resource 1 is at least one of the following: CORESET, SS, MO, and alternative PDCCH.

[0281] For example, the association relationship between the signal 1 and the resource 1 includes, but is not limited to, one or more of the following:

[0282] A. The relationship between signal 1 and CORESET.

[0283] B, the relationship between signal 1 and SS;

[0284] C, the relationship between signal 1 and MO;

[0285] D. Association between signal 1 and candidate PDCCH.

[0286] For ease of description, the following description takes the association relationship between signal 1 and CORESET as an example. The content also applies to the association relationship between signal 1 and SS, or the association relationship between signal 1 and MO, or the association relationship between signal 1 and alternative PDCCH.

[0287] Exemplarily, the association relationship between signal 1 and CORESET is used to indicate that the type of resource associated with signal 1 is CORESET.

[0288] Optionally, the association relationship between signal 1 and CORESET can also be used to indicate which signals 1 are associated with which CORESETs. A signal 1 can be associated with one CORESET, a signal 1 can be associated with multiple CORESETs, or multiple signals 1 can be associated with one CORESET, without limitation.

[0289] The specific manifestation of the association relationship between signal 1 and CORESET can be one or more CORESETs associated with signal 1 (for example, CDS-1 is associated with CORESET-1 and CORESET-2), or one or more control signals associated with CORESET (for example, CORESET-1 is associated with CDS-1 and CDS-2), which is not limited in the embodiments of the present application. For example, information 1 is used to configure CDS-1, and information 1 carries the identifier of the CORESET associated with CDS-1, such as CORESET-1 and CORESET-2, indicating that CDS-1 is associated with CORESET-1 and CORESET-2. Or for example, information 1 is used to configure CORESET-1, and information 1 carries the identifier of signal 1 associated with CORESET-1, such as CDS-1 and CDS-2, indicating that CORESET-1 is associated with CDS-1 and CDS-2.

[0290] The association relationship between signal 1 and resource 1 includes any one of A, B, C, and D above, or a combination of A, B, C, and D. When there are multiple association relationships between signal 1 and resource 1, this may indicate that resource 1 includes multiple types. For example, the association relationships between signal 1 and resource 1 include: an association relationship between signal 1 and CORESET-1, an association relationship between signal 1 and SS-1, and an association relationship between signal 1 and MO-1 and MO-2, and resource 1 includes CORESET-1, SS1, MO-1, and MO-2.

[0291] This design approach ensures that the behavior of network devices corresponds to that of terminal devices, thereby improving the reliability of communication between network devices and terminal devices.

[0292] In one possible implementation, resource 1 is associated with PDCCH 1. In this way, the PDCCH 1 associated with signal 1 can be determined based on the association between signal 1 and resource 1 and the association between resource 1 and PDCCH 1.

[0293] When the configuration parameters of signal 1 include the type of signal 1 and the association between signal 1 and resource 1, the type of signal 1 and the association between signal 1 and resource 1 correspond (or match). For example, if the type of signal 1 is a CORESET-associated signal, resource 1 is CORESET; for example, if the type of signal 1 is an SS-associated signal, resource 1 is SS; for example, if the type of signal 1 is an MO-associated signal, resource 1 is MO; for example, if the type of signal 1 is a candidate PDCCH-associated signal, resource 1 is a candidate PDCCH.

[0294] Parameter 2, the type of signal 1, and the association between signal 1 and resource 1 do not necessarily all exist in the configuration parameters of signal 1. For example, if the system defaults or the standard specifies that signal 1 is enabled, the configuration parameters of signal 1 may not include parameter 2; for example, if the system defaults or the standard specifies the type of signal 1, the configuration parameters of signal 1 may not include the type of signal 1; for example, if the system defaults or the standard specifies the resources associated with each type of signal 1, the configuration parameters of signal 1 may not include the association between signal 1 and resource 1, and so on.

[0295] When the type of signal 1 is a CORESET-associated signal, the network device sends signal 1 according to the granularity of CORESET. For example, a signal 1 is sent corresponding to one or more CORESETs, and PDCCH1 exists in the one or more CORESETs. Compared with other types of signal 1, this can reduce overhead.

[0296] When Signal 1 is the first signal associated with a candidate PDCCH, the network device sends Signal 1 at the granularity of the candidate PDCCH. For example, a Signal 1 is sent corresponding to one or more candidate PDCCHs, where PDCCH 1 is present. This can reduce the number of PDCCH detections compared to other Signal 1 types.

[0297] In one possible design, information 1 may also carry resource configuration parameters, which are used to configure PDCCH resources. PDCCH resource configuration parameters include, but are not limited to, one or more of CORESET, SS, MO, and alternative PDCCH. In a specific implementation, the network device configures one or more CORESETs and one or more SSs for the terminal device. For the description of the relationship between CORESET and SS, please refer to the description of the aforementioned terms and will not be repeated here.

[0298] In one possible design, information 1 is a radio resource control (RRC) message (or RRC signaling), or information 1 is carried in an RRC message (or RRC signaling).

[0299] S302 : The network device sends signal 1 and PDCCH 1 associated with signal 1 .

[0300] When the network device is implemented by multiple RAN nodes, for example, when the network device is a network device in an ORAN system, the network device sends signal 1 and PDCCH 1. Specifically, one of the O-CU, O-DU, and O-RU may send signal 1 and PDCCH 1, or multiple of the O-CU, O-DU, and O-RU may jointly send signal 1 and PDCCH.

[0301] The network device sending signal 1 may be sending signal 1 to one terminal device or sending signal 1 to multiple terminal devices. In other words, the network device sending signal 1 includes signal 1 corresponding to one terminal device or signals 1 corresponding to multiple terminal devices. The number of signals 1 sent by the network device to each terminal device can be one or more, without limitation.

[0302] The PDCCH1 associated with signal 1 refers to the PDCCH1 corresponding to resource 1 associated with signal 1. For example, the PDCCH1 associated with signal 1 includes one or more of the following: PDCCH1 corresponding to (one or more) CORESETs associated with signal 1, PDCCH1 corresponding to (one or more) SSs associated with signal 1, PDCCH1 corresponding to (one or more) MOs associated with signal 1, PDCCH1 corresponding to (one or more) alternative PDCCHs associated with signal 1, and the like.

[0303] S303. The terminal device receives signal 1 according to the configuration parameters of signal 1.

[0304] The terminal device detects whether the network device has sent Signal 1 to the terminal device based on the configuration parameters of Signal 1, or detects whether the network device has sent Signal 1 corresponding to the terminal device based on the configuration parameters of Signal 1. For example, the configuration parameters of Signal 1 include Parameter 2, where Parameter 2 indicates that Signal 1 is enabled, and the terminal device detects whether the network device has sent Signal 1 to the terminal device; and where Parameter 2 indicates that Signal 1 is disabled, the terminal device does not detect whether the network device has sent Signal 1 to the terminal device. For example, the configuration parameters include the type of Signal 1, and the terminal device detects whether the network device has sent a Signal 1 of that type to the terminal device based on the type of Signal 1.

[0305] When information 1 includes configuration parameters for signal 1 for multiple terminal devices, the terminal device receives first signal 1 based on the configuration parameters for signal 1 corresponding to the terminal device. Taking the configuration parameters shown in Table 3 above as an example, the configuration parameters for signal 1 received by the first terminal device include configuration parameters for CDS-1 and CDS-2. CDS-1 corresponds to the first terminal device, and CDS-2 corresponds to the second terminal device. The first terminal device detects whether the network device has sent CDS-1 to the terminal device based on the configuration parameters for CDS-1.

[0306] When the configuration parameters of signal 1 include multiple configuration parameters of signal 1 corresponding to the terminal device, the terminal device receives signal 1 based on the configuration parameters of each signal 1 corresponding to the terminal device in the configuration parameters of signal 1. Taking the configuration parameters shown in Table 4 above as an example, the configuration parameters of signal 1 received by the first terminal device include the configuration parameters of CDS-1 and the configuration parameters of CDS-3. Both CDS-1 and CDS-3 correspond to the first terminal device. The first terminal device detects whether the network device has sent CDS-1 to the terminal device based on the configuration parameters of CDS-1, and detects whether the network device has sent CDS-3 to the terminal device based on the configuration parameters of CDS-3.

[0307] In some embodiments, the resource location of signal 1 may be preconfigured (the time-frequency resources of signal 1 may be configured by a network device, for example, the resource location of signal 1 is indicated in a resource configuration parameter, or the resource location of signal 1 is specified by a standard or protocol, etc., without limitation). The process of the terminal device receiving signal 1 according to the configuration parameters of signal 1 may include:

[0308] If signal 1 corresponds to the terminal device, it is determined that signal 1 has been successfully received. In this way, the terminal device will continue to receive the PDCCH corresponding to signal 1 only when it receives the signal 1 corresponding to itself. The terminal device can receive the PDCCH associated with signal 1 corresponding to itself as needed. Or,

[0309] If the signal 1 does not correspond to the terminal device, it is determined that the reception of the signal 1 has failed. In this way, when the terminal device receives a signal 1 that does not correspond to itself, it does not continue to receive the PDCCH 1 corresponding to the signal 1, which can reduce the overhead of the terminal device.

[0310] Exemplarily, the terminal device detects signal 1 at all resource locations where signal 1 may exist;

[0311] If signal 1 is detected at any resource location, correlation matching (or correlation detection) is performed between the signal 1 and the signal 1 corresponding to the terminal device (such as signal 1 stored in the terminal device);

[0312] Based on the correlation matching result, it is determined whether the received signal 1 is the signal 1 corresponding to the terminal device. If the correlation matching is successful, such as the correlation value exceeds the threshold, it means that the received signal 1 corresponds to the terminal device and the terminal device has successfully received the signal 1. If the correlation matching fails, such as the correlation value does not exceed the threshold, it means that the received signal 1 does not correspond to the terminal device and the terminal device has failed to receive the signal 1.

[0313] For example, the terminal device detects CDS-1 at resource location 1 and CDS-2 at resource location 2. The terminal device performs correlation matching on CDS-1 and CDS-2 respectively with the CDS corresponding to the terminal device. The matching result is that CDS-1 corresponds to the terminal device and CDS-2 does not correspond to the terminal device. Then the terminal device successfully receives CDS-1 and fails to receive CDS-2.

[0314] After the terminal device receives signal 1, the terminal device determines whether to perform PDCCH reception (or detection or blind detection) based on the reception status of signal 1 (success or failure), or in other words, determines on which resources PDCCH reception (or detection or blind detection) needs to be performed.

[0315] If the terminal device successfully receives signal 1, it executes:

[0316] S304, the terminal device receives PDCCH1;

[0317] If the terminal device fails to receive signal 1, execute:

[0318] S305. The terminal device does not receive PDCCH1.

[0319] The number of signals 1 successfully received by the terminal device may be one or more, depending on the actual situation. The number of signals 1 failed to be received by the terminal device may be one or more, depending on the actual situation. When the terminal device receives multiple signals 1, the terminal device may receive all of them successfully (for example, the terminal device detects CDS-1, and CDS-1 is received successfully), or may fail to receive all of them (for example, the terminal device detects CDS-2, and CDS-2 fails to be received), or may receive some of them successfully and fail to receive the other part (for example, the terminal device detects CDS-1 and CDS-2, CDS-1 is received successfully, and CDS-2 fails to be received). In other words, there may be only one of S304 and S305, or they may exist at the same time. When S304 and S305 exist at the same time, the signal 1 in S304 is different from the signal 1 in S305.

[0320] The terminal device receiving PDCCH1 means that the terminal device receives PDCCH1 associated with the successfully received signal 1. The terminal device not receiving PDCCH1 includes: the terminal device not receiving PDCCH1 associated with the unsuccessfully (i.e., failed) received signal 1. For example, the first terminal device successfully receives CDS-1 but fails to receive CDS-2. The first terminal device receives the PDCCH associated with CDS-1, but does not receive the PDCCH associated with CDS-2.

[0321] In some embodiments, the terminal device does not receive PDCCH1, which can also be described as the terminal device skipping the PDCCH associated with signal 1 during the process of performing PDCCH blind detection (or detection).

[0322] In some embodiments, the PDCCH1 associated with signal 1 refers to the PDCCH1 corresponding to resource 1 associated with signal 1. When the configuration parameters of signal 1 include the association relationship between signal 1 and resource 1, the terminal device can receive PDCCH1 according to the configuration parameters of signal 1. For example, taking resource 1 as a CORESET as an example, the terminal device receives PDCCH1 in the CORESET associated with signal 1 based on the association relationship between signal 1 and the CORESET.

[0323] By introducing signal 1, the terminal device can determine whether the network device has sent PDCCH1 to the terminal device based on signal 1, which can avoid the terminal device traversing all possible resource locations for PDCCH, thereby reducing the overhead of the terminal device performing blind detection of PDCCH.

[0324] In one possible design, before S301, the terminal device may also report information 2 (or capability information of the terminal device) (such as second information) to the network device, and the network device may send information 1 and signal 1 based on information 2. Information 2 is used to indicate one or more of the following:

[0325] A. Whether the terminal device supports PDCCH reception according to signal 1, or whether the terminal device supports signal 1, or whether the terminal device supports enabling signal 1.

[0326] When the network device determines that the terminal device supports signal 1, parameter 2 indicates that signal 1 is enabled. When the network device determines that the terminal device does not support signal 1, parameter 2 indicates that signal 1 is not enabled.

[0327] In a specific implementation, the terminal device may carry parameter 3 (such as a third parameter) in information 2 to indicate whether the terminal device supports signal 1. There are many ways to implement parameter 3, and several possible examples are listed below:

[0328] Mode 1 and parameter 3 have two values, indicating support for signal 1 and non-support for signal 1. For example, parameter 3 is a bit. When the bit is 0, it indicates support for signal 1, and when the bit is 1, it indicates non-support for signal 1; or, when the bit is 1, it indicates support for signal 1, and when the bit is 0, it indicates non-support for signal 1.

[0329] Mode 2 and parameter 3 have only one value, indicating support for signal 1. In other words, as long as parameter 3 is included in message 2, signal 1 is supported. If parameter 3 is not included in message 2, signal 1 is not supported by default.

[0330] Mode 3 and Parameter 3 have only one value, indicating that Signal 1 is not supported. In other words, when Parameter 3 is not configured or when Parameter 3 in Information 2 is empty, Signal 1 is supported by default; when Parameter 3 is configured, Signal 1 is not supported.

[0331] Of course, the above three methods are just examples.

[0332] When the network device determines through information 2 that the terminal device supports signal 1, it sends the configuration parameters of signal 1 and / or signal 1 to the terminal device.

[0333] B. Types of signal 1 supported by the terminal device;

[0334] C. The number of signal 1 types supported by the terminal device.

[0335] The network device sends the signal 1 within the number range of the types of the signal 1 supported by the terminal device. For example, if the terminal device supports two types of the signal 1, the network device sends one or two types of the signal 1 to the terminal device.

[0336] D. Whether the terminal device supports the association between signal 1 and resource 1.

[0337] E. The number of signal 1s supported by the terminal device.

[0338] The number of signals 1 supported by the terminal device may include: the maximum number of signals 1 that the terminal device supports receiving, or the maximum number of times the terminal device supports receiving signal 1. For example, if the number of signals 1 supported by the terminal device is 3, it means that the terminal device can receive a maximum of 3 (or 3 times) signals 1, and when the network device sends signal 1 to the terminal device (or sends signal 1 corresponding to the terminal device), it can send a maximum of 3 (or 3 times) signals 1 (it can be understood that the types of the three signals 1 can be the same or different, without limitation).

[0339] In this way, the number of signals 1 sent by the network device to the terminal device is within the receiving capability of the terminal device.

[0340] Through the above design, the network device sends the configuration parameters of signal 1 and signal 1 according to information 2, which can improve the reliability of communication.

[0341] In summary, different terminal devices may correspond to different sequences and thus correspond to different signals for associating PDCCH. For example, a first terminal device corresponds to a first sequence, the first sequence is used to generate a first signal, and the first terminal device determines whether it needs to receive the PDCCH associated with the first signal based on the detection result or reception result of the first signal; a second terminal device corresponds to a second sequence, the second sequence is used to generate a second signal, and the second terminal device determines whether it needs to receive the PDCCH associated with the second signal based on the detection result or reception result of the second signal. In this way, each terminal device can correspond to a different signal for associating PDCCH, so that different terminal devices can be distinguished.

[0342] By introducing signal 1 generated according to sequence 1, the terminal device receives PDCCH1 only when it successfully receives signal 1, and the terminal device receives PDCCH1 associated with signal 1, so that the terminal device can receive PDCCH on demand, which can avoid the terminal device traversing all possible resource locations for PDCCH blind detection, thereby reducing the overhead of the terminal device when performing PDCCH blind detection.

[0343] It can be understood that the above embodiments can be implemented separately or in combination with each other without limitation.

[0344] Finally, the communication device of the embodiment of the present application is described.

[0345] Figure 5 is a schematic block diagram of a communication device according to an embodiment of the present application. The communication device may be, for example, a satellite, a base station, a terminal, or an access point, or a chip or circuit within a satellite, a base station, a terminal, or an access point. The communication device includes modules, units, or means corresponding to the steps of the method in the above method embodiment. The functions, units, or means may be implemented by software or hardware, or the corresponding software implementation may be executed by hardware.

[0346] For example, the communication device can be a terminal device side device in the above embodiment, for example, a terminal device or a communication module in the terminal device, or a circuit or chip responsible for the communication function in the terminal device. Among them, the terminal device may include a processor 5101, a memory 5102 (this is an optional structure) and a transceiver 5103, and the transceiver 5103 includes a transmitter 51031, a receiver 51032 and an antenna 51033. The receiver 51032 can be used to receive signals through the antenna 51033, and the transmitter 51031 can be used to send signals through the antenna 51033. In addition, the processor 5101 can be used to perform processing-related operations on the terminal device side in the above method embodiment. The transceiver 5103 can be used to perform reception-related operations on the terminal device side in the above method embodiment. Among them, the memory 5102 can be used to store device program code and / or data.

[0347] Exemplary: transceiver 5103 is used to receive information 1, which includes configuration parameters of signal 1; processor 5101 is used to control transceiver 5103 to receive signal 1 according to the configuration parameters of signal 1; if signal 1 is successfully received, control transceiver 5103 to receive PDCCH1.

[0348] For example, the communication device may be a network device side device in the above-mentioned embodiment, for example, a network device or a communication module in the network device, or a circuit or chip responsible for the communication function in the network device. Among them, the network device may include a processor 5201, a memory 5202 (this is an optional structure) and a transceiver 5203, and the transceiver 5203 includes a transmitter 52031, a receiver 52032 and an antenna 52033. The receiver 52032 can be used to receive signals through the antenna 52033, and the transmitter 52031 can be used to send signals through the antenna 52033. In addition, the processor 5201 can be used to perform processing-related operations on the network device side in the above method embodiment. The transceiver 5203 can be used to perform reception-related operations on the network device side in the above method embodiment. Among them, the memory 5202 can be used to store device program code and / or data.

[0349] Exemplarily, the transceiver 5203 is configured to send information 1, including configuration parameters of signal 1, and send signal 1 and PDCCH 1 associated with signal 1. Optionally, the processor 5201 is configured to generate information 1 and signal 1, etc.

[0350] All relevant contents of each step involved in the above method embodiment can be referred to the functional description of the corresponding functional module and will not be repeated here.

[0351] Figure 6 is a schematic block diagram of another communication device according to an embodiment of the present application. The communication device includes a processing circuit 610 and a transceiver circuit 620. The processing circuit 610 and the transceiver circuit 620 can be interconnected or coupled, for example, via a bus 630. The communication device can be a terminal device or a network device.

[0352] Optionally, the communication device may further include a memory 640. The memory 640 includes, but is not limited to, random access memory (RAM), read-only memory (ROM), erasable programmable read-only memory (EPROM), or compact disc read-only memory (CD-ROM), and is used to store device program code and / or data.

[0353] The processing circuit 610 may be all or part of the processing circuit in one or more processors, or one or more processors. The processor may be a central processing unit (CPU). When the processing circuit 610 is a CPU, the CPU may be a single-core CPU or a multi-core CPU. The processing circuit 610 may be a signal processor, a chip, or other integrated circuit that can implement the method of the present application, or a portion of the circuit for processing functions in the aforementioned processor, chip or integrated circuit. In addition, the transceiver circuit 620 may also be a transceiver, or an input / output interface, which is used for input or output of signals or data, and may also be referred to as an input / output circuit.

[0354] When the communication device is a terminal device, exemplarily, the processing circuit 610 is used to perform the following operations: receive information 1, information 1 including configuration parameters of signal 1; receive signal 1 according to the configuration parameters of signal 1; if signal 1 is successfully received, receive PDCCH1 associated with signal 1, etc.

[0355] When the communication device is a network device, illustratively, the processing circuit 610 is configured to perform the following operations: sending information 1; sending signal 1 and PDCCH 1, etc.

[0356] The above contents are merely exemplary descriptions. When the communication device is a terminal device or a network device, it will be responsible for executing the methods or steps related to the terminal device or the network device in the above method embodiments.

[0357] When the communication device is a terminal device or a network device, the transceiver circuit 620 may be a transceiver. When the communication device is a chip for a terminal device or a network device, the transceiver circuit 620 may be an input / output circuit. The above description is only an example description.

[0358] For details, please refer to the contents of the above method embodiment. The implementation of each operation in FIG6 can also correspond to the corresponding description of the method embodiment shown in FIG3.

[0359] Figure 7 is a schematic block diagram of another communication device according to an embodiment of the present application. The communication device may be a terminal device or a network device, and is used to implement the method involved in the above embodiment.

[0360] The communication device includes a transceiver unit 710 and a processing unit 720. The transceiver unit 710 may include a transmitting unit and a receiving unit. The transmitting unit is configured to perform a transmitting operation of the communication device, and the receiving unit is configured to perform a receiving operation of the communication device. For ease of description, this embodiment of the application combines the transmitting unit and the receiving unit into a single transceiver unit. This is described here as a unified description and will not be repeated later.

[0361] The communication device is a terminal device. Exemplarily, the transceiver unit 710 is used to receive information 1 and receive signal 1 according to the configuration parameters of signal 1; the processing unit 720 is used to instruct the transceiver unit 710 to receive PDCCH1, etc. if signal 1 is successfully received.

[0362] The communication device is a network device. For example, the transceiver unit 710 is used to send information 1 and signal 1, etc.; the processing unit 720 is used to execute the content of the network device involving processing, control and other steps, for example, the processing unit 720 is used to determine information 1 and signal 2, etc.

[0363] When the communication device is a terminal device or a network device, it will be responsible for executing one or more of the methods or steps related to the terminal device or the network device in the aforementioned method embodiment.

[0364] Optionally, the communication device further includes a storage unit 730, which is used to store programs, codes, data, etc. for executing the aforementioned method.

[0365] The transceiver unit in FIG. 7 may correspond to the transceiver circuit in FIG. 6 , and the processing unit in FIG. 7 may correspond to the processing circuit in FIG. 6 .

[0366] The device embodiments shown in Figures 6 and 7 are used to implement the content described in Figure 3. The specific execution steps and methods of the devices shown in Figures 6 and 7 can refer to the content described in the above method embodiments.

[0367] The present application also provides a chip including a processor configured to retrieve and execute instructions stored in a memory, so that a communication device equipped with the chip executes the methods described in the above examples. The memory may be integrated within the chip or located outside the chip.

[0368] The present application also provides another chip, comprising: an input interface, an output interface, and a processing circuit, wherein the input interface, the output interface, and the processor are connected via an internal connection path, and the processing circuit is used to execute the code in the memory. When the code is executed, the processing circuit is used to execute the method in each of the above examples. Optionally, the chip also includes a memory, which is used to store computer programs or code. The input interface and the output interface can be independent of each other, or can be integrated into an input and output interface.

[0369] The processing circuit may be all or part of the processing circuits in one or more processors, or one or more processors.

[0370] The present application also provides a processor for coupling with a memory, and for executing the methods and functions involving a network device or a terminal device in any of the above embodiments.

[0371] In another embodiment of the present application, a computer program product including instructions is provided. When the computer program product is run on a computer, the method of the above embodiment is implemented.

[0372] The present application also provides a computer program. When the computer program is executed in a computer, the method of the aforementioned embodiment is implemented.

[0373] In another embodiment of the present application, a computer-readable storage medium is provided, which stores a computer program. When the computer program is executed by a computer, the method described in the above embodiment is implemented.

[0374] It should be understood that in the embodiments of the present application, the processor may be a central processing unit (CPU), and the processor may also be other general-purpose processors, digital signal processors (DSP), application-specific integrated circuits (ASIC), field programmable gate arrays (FPGA) or other programmable logic devices, discrete gate or transistor logic devices, discrete hardware components, etc. The general-purpose processor may be a microprocessor or any conventional processor, etc.

[0375] It should also be understood that the memory in the embodiments of the present application may be a volatile memory or a non-volatile memory, or may include both volatile and non-volatile memories. Among them, the non-volatile memory may be a read-only memory (ROM), a programmable read-only memory (PROM), an erasable programmable read-only memory (EPROM), an electrically erasable programmable read-only memory (EEPROM), or a flash memory. The volatile memory may be a random access memory (RAM), which is used as an external cache. By way of example and not limitation, many forms of random access memory (RAM) are available, such as static RAM (SRAM), dynamic random access memory (DRAM), synchronous DRAM (SDRAM), double data rate SDRAM (DDR SDRAM), enhanced SDRAM (ESDRAM), synchronous link DRAM (SLDRAM), and direct rambus RAM (DR RAM). It should be noted that the memory of the systems and methods described herein is intended to include, but is not limited to, these and any other suitable types of memory.

[0376] The above embodiments can be implemented in whole or in part by software, hardware, firmware or any other combination. When implemented using software, the above embodiments can be implemented in whole or in part in the form of a computer program product. The computer program product includes one or more computer instructions or computer programs. When the computer instructions or computer program are loaded or executed on a computer, the process or function described in the embodiment of the present application is generated in whole or in part. The computer can be a general-purpose computer, a special-purpose computer, a computer network, or other programmable device. 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 by wired or wireless (e.g., infrared, wireless, microwave, etc.) means. The computer-readable storage medium can be any available medium that can be accessed by a computer or a data storage device such as a server or data center that contains one or more available media sets. The available medium can be a magnetic medium (e.g., a floppy disk, a hard disk, a tape), an optical medium (e.g., a DVD), or a semiconductor medium. The semiconductor medium can be a solid-state drive.

[0377] It should be understood that in the various embodiments of the present application, the size of the serial numbers of the above-mentioned processes does not mean the order of execution. The execution order of each process should be determined by its function and internal logic, and should not constitute any limitation on the implementation process of the embodiments of the present application.

[0378] Those skilled in the art will appreciate that the various exemplary units and algorithmic steps described in conjunction with the embodiments disclosed herein can be implemented using electronic hardware, or a combination of computer software and electronic hardware. Whether these functions are implemented using hardware or software depends on the specific application and design constraints of the technical solution. Professionals and technicians may use different methods to implement the described functions for each specific application, but such implementations should not be considered beyond the scope of this application. Those skilled in the art will clearly understand that, for ease of description and brevity, the specific operating processes of the systems, devices, and units described above can refer to the corresponding processes in the aforementioned method embodiments and will not be repeated here. In the several embodiments provided in this application, it should be understood that the disclosed systems, devices, and methods can be implemented in other ways. For example, the device embodiments described above are merely illustrative. For example, the division of units is merely a logical functional division. In actual implementation, other divisions may be used, such as multiple units or components can be combined or integrated into another system, or some features can be omitted or not implemented. Furthermore, the coupling or direct coupling or communication connection shown or discussed between each other can be through some interface, and the indirect coupling or communication connection between devices or units can be electrical, mechanical, or other forms.

[0379] The units described as separate components may or may not be physically separate, and the components displayed as units may or may not be physical units, that is, they may be located in one place or distributed across multiple network units. Some or all of the units may be selected according to actual needs to achieve the purpose of the present embodiment. In addition, the functional units in the various embodiments of the present application may be integrated into a processing unit, or each unit may exist physically separately, or two or more units may be integrated into a single unit. If the above functions are implemented in the form of software functional units and sold or used as independent products, they may be stored in a computer-readable storage medium. Based on this understanding, the technical solution of the present application, or the portion that contributes to the prior art, or the portion of the technical solution, may be embodied in the form of a software product, which is stored in a storage medium and includes several instructions for causing a computer device (which may be a personal computer, server, or network device, etc.) to execute all or part of the steps of the method described in the various embodiments of the present application. The aforementioned storage medium includes various media that can store program code, such as a USB flash drive, a mobile hard drive, a read-only memory, a random access memory, a magnetic disk, or an optical disk.

[0380] Those skilled in the art will appreciate that the units and algorithm steps of each example described in conjunction with the embodiments disclosed herein can be implemented in electronic hardware, or a combination of computer software and electronic hardware. Whether these functions are performed in hardware or software depends on the specific application and design constraints of the technical solution. Professional and technical personnel can use different methods to implement the described functions for each specific application, but such implementation should not be considered beyond the scope of this application.

Claims

1. A communication method, characterized in that: include: Sending first information, where the first information includes configuration parameters of the first signal; The first signal and a physical downlink control channel PDCCH are sent, where the first signal is determined according to a first sequence, and the first signal is used by the terminal device to determine whether to receive the PDCCH.

2. A communication method, characterized in that: include: receiving first information, where the first information includes configuration parameters of a first signal, where the first signal is determined according to a first sequence; receiving the first signal according to configuration parameters of the first signal; If the first signal is successfully received, a physical downlink control channel PDCCH associated with the first signal is received.

3. The method according to claim 2, characterized in that The method further comprises: If the first signal corresponds to the terminal device, it is determined that the first signal is successfully received.

4. The method according to claim 2, characterized in that Also includes: If the first signal does not correspond to the terminal device, it is determined that reception of the first signal has failed.

5. The method according to claim 4, characterized in that The method further comprises: not receiving the PDCCH associated with the first signal; or, When performing PDCCH blind detection, the PDCCH associated with the first signal is skipped.

6. The method according to any one of claims 1 to 5, characterized in that The first signal is determined according to a first sequence, including: The first signal is determined according to one or both of a type of the first sequence and a generation parameter of the first sequence.

7. The method according to claim 6, characterized in that The type of the first sequence includes at least one of the following: m sequence, gold sequence, or ZC sequence.

8. The method according to claim 7, characterized in that The type of the first sequence is the m-sequence or the gold sequence, and generation parameters of the first sequence include at least one of the following: Generator polynomial, cyclic shift amount, or sequence initial value.

9. The method according to claim 7, characterized in that The type of the first sequence is the ZC sequence, and generation parameters of the first sequence include at least one of the following: Sequence period, cyclic shift amount, or root index.

10. The method according to any one of claims 1 to 9, characterized in that The first sequence is associated with a first parameter, which is used to identify the first signal. The first parameter is determined according to a cell identifier and an identifier of the terminal device, and the terminal device is located in a cell identified by the cell identifier.

11. The method according to claim 10, characterized in that The first parameter satisfies any one of the following: X*N1+N2, or Y*N2+N1; X is the total number of cell identifiers, Y is the total number of terminal devices in the cell, N1 is the identifier of the terminal device, and N2 is the cell identifier.

12. The method according to any one of claims 1 to 11, characterized in that The configuration parameters of the first signal include at least one of the following: a second parameter, wherein the second parameter is used to determine whether to enable the first signal; The type of the first signal, where the type of the first signal is at least one of the following: a signal associated with a control resource set, a signal associated with a search space, a signal associated with a listening opportunity, and a signal associated with an alternative PDCCH; The association relationship between the first signal and the first resource, the first resource is at least one of the following: a control resource set, a search space, a listening opportunity, and an alternative PDCCH.

13. The method according to claim 12, characterized in that The first resource is associated with the PDCCH.

14. The method according to any one of claims 1, 6 to 13, characterized in that Before sending the first information, the method further includes: Receive second information, where the second information indicates at least one of the following: whether the terminal device supports receiving the PDCCH according to the first signal; whether the terminal device supports the first signal; a type of the first signal supported by the terminal device; the number of types of the first signal supported by the terminal device; whether the terminal device supports the association relationship between the first signal and the first resource, where the first resource is at least one of the following: a control resource set, a search space, a listening opportunity, and an alternative PDCCH; or The number of the first signals supported by the terminal device.

15. The method according to any one of claims 2 to 13, characterized in that Before receiving the first information, the method further includes: Sending second information, where the second information indicates one or more of the following: whether the terminal device supports receiving the PDCCH according to the first signal; whether the terminal device supports the first signal; the type of the first signal supported by the terminal device; the number of types of the first signal supported by the terminal device; Whether the terminal device supports the association relationship between the first signal and the first resource, where the first resource is at least one of the following: a control resource set, a search space, a listening opportunity, and an alternative PDCCH; or The number of the first signals supported by the terminal device.

16. A communication device, characterized in that: The device comprises a processor, wherein the processor is configured to cause the communication device to execute the method according to any one of claims 1 to 15 by executing a computer program or instruction, or by a logic circuit.

17. The communication device according to claim 16, wherein: The communication device further comprises a memory for storing the computer program or instructions.

18. The communication device according to claim 16 or 17, characterized in that: The communication device further includes a communication interface, which is used to input and / or output signals.

19. A communication device, characterized in that: The method comprises a logic circuit and an input / output interface, wherein the input / output interface is used to input and / or output signals, and the logic circuit is used to execute the method according to any one of claims 1 to 15.

20. A computer-readable storage medium, characterized in that The computer-readable storage medium stores a computer program or instructions, and when the computer program or instructions are run on a computer, the method according to any one of claims 1 to 15 is executed.

21. A computer program product, characterized in that The invention comprises instructions, which, when executed on a computer, cause the method according to any one of claims 1 to 15 to be performed.

22. A communication device, characterized in that: include: The transceiver unit is configured to: send first information, where the first information includes configuration parameters of the first signal; The transceiver unit is further used to: send the first signal and a physical downlink control channel PDCCH, the first signal is determined according to a first sequence, and the first signal is used by the terminal device to determine whether to receive the PDCCH.

23. A communication device, characterized in that: include: a transceiver unit, configured to receive first information, where the first information includes configuration parameters of a first signal, where the first signal is determined according to a first sequence; The transceiver unit is further configured to receive the first signal according to the configuration parameters of the first signal; The transceiver unit is further configured to receive a physical downlink control channel (PDCCH) associated with the first signal if the first signal is successfully received.

24. The device according to claim 23, characterized in that The method further comprises: If the first signal corresponds to the terminal device, it is determined that the first signal is successfully received.

25. The device according to claim 23, characterized in that The device further comprises: The processing unit is configured to: if the first signal does not correspond to the terminal device, determine that reception of the first signal has failed.

26. The device according to claim 25, characterized in that The transceiver unit is not configured to not receive the PDCCH associated with the first signal; or The processing unit is configured to skip the PDCCH associated with the first signal when performing PDCCH blind detection.

27. The device according to any one of claims 22 to 26, characterized in that The first signal is determined according to a first sequence, including: The first signal is determined according to one or both of a type of the first sequence and a generation parameter of the first sequence.

28. The device according to claim 27, characterized in that The type of the first sequence includes at least one of the following: m sequence, gold sequence, or ZC sequence.

29. The device according to claim 28, characterized in that The type of the first sequence is the m-sequence or the gold sequence, and generation parameters of the first sequence include at least one of the following: Generator polynomial, cyclic shift amount, or sequence initial value.

30. The device according to claim 28, wherein The type of the first sequence is the ZC sequence, and generation parameters of the first sequence include at least one of the following: Sequence period, cyclic shift amount, or root index.

31. The device according to any one of claims 22 to 30, characterized in that The first sequence is associated with a first parameter, which is used to identify the first signal. The first parameter is determined according to a cell identifier and an identifier of the terminal device, and the terminal device is located in a cell identified by the cell identifier.

32. The device according to claim 31, characterized in that The first parameter satisfies any one of the following: X*N1+N2, or Y*N2+N1; X is the total number of cell identifiers, Y is the total number of terminal devices in the cell, N1 is the identifier of the terminal device, and N2 is the cell identifier.

33. The device according to any one of claims 22 to 32, characterized in that The configuration parameters of the first signal include at least one of the following: a second parameter, wherein the second parameter is used to determine whether to enable the first signal; The type of the first signal, where the type of the first signal is at least one of the following: a signal associated with a control resource set, a signal associated with a search space, a signal associated with a listening opportunity, and a signal associated with an alternative PDCCH; The association relationship between the first signal and the first resource, the first resource is at least one of the following: a control resource set, a search space, a listening opportunity, and an alternative PDCCH.

34. The device according to claim 33, characterized in that The first resource is associated with the PDCCH.

35. The device according to any one of claims 22, 27 to 34, characterized in that The transceiver unit is further configured to receive second information, where the second information indicates at least one of the following: whether the terminal device supports receiving the PDCCH according to the first signal; whether the terminal device supports the first signal; a type of the first signal supported by the terminal device; the number of types of the first signal supported by the terminal device; whether the terminal device supports the association relationship between the first signal and the first resource, where the first resource is at least one of the following: a control resource set, a search space, a listening opportunity, and an alternative PDCCH; or The number of the first signals supported by the terminal device.

36. The device according to any one of claims 23 to 34, characterized in that The transceiver unit is further configured to send second information, where the second information indicates one or more of the following: whether the terminal device supports receiving the PDCCH according to the first signal; whether the terminal device supports the first signal; the type of the first signal supported by the terminal device; the number of types of the first signal supported by the terminal device; Whether the terminal device supports the association relationship between the first signal and the first resource, where the first resource is at least one of the following: a control resource set, a search space, a listening opportunity, and an alternative PDCCH; or The number of the first signals supported by the terminal device.

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