Communication method and communication apparatus

Abstract

Provided in the present application is a communication method. By associating a first SRS sequence with a first cell, an SRS sequence generated and sent by a terminal device serving in the first cell is different from those of other cells. In addition, a first resource used for sending the first SRS sequence can be further associated with the first cell, so that the resource of the first cell used for sending the first SRS sequence can be different from those of the other cells. If the first cell is a cell managed by a network device, the network device can use the first SRS sequence to estimate uplink channel quality, or otherwise does not use the first SRS sequence, thus reducing inter-cell SRS interference.

Description

Communication method and communication apparatus

[0001] This application claims priority to the Chinese patent application with the application number 2024108767956, the title of which is "Communication method and communication apparatus", filed on June 28, 2024, with the State Intellectual Property Office of China, the entire content of which is incorporated herein by reference. TECHNICAL FIELD

[0002] The present application relates to the field of communication technology, and more particularly, to a communication method and a communication apparatus. BACKGROUND

[0003] Urban air mobility (UAM) uses electric vertical take-off and landing (eVTOL) aircraft for urban air mobility to provide services for passenger transportation, logistics transportation and other fields. The unmanned aircraft or on-board passenger equipment in the UAM system as user equipment (UE) communicates with the ground next generation Node B (gNB) through the ground fifth generation (5G) new radio (NR).

[0004] In order to enable the ground base station to more accurately understand the channel state of the aerial UE, the aerial UE will send a channel sounding reference signal (SRS) in the uplink direction, and the ground base station estimates the uplink channel quality by receiving the SRS. Therefore, the ground base station or the cell managed by the ground base station needs to configure SRS resources or SRS resource sets for the UEs served by the cell. At present, the cell independently configures SRS for the UEs served by the cell, which can reduce the interference of SRS within the cell.

[0005] However, since the cell independently configures SRS, there will be a case that different cells configure the same SRS sequence or configure the same resource for sending SRS, which will cause interference between SRS of different cells. Especially for the UAM scenario, the aerial UE flies at a very high altitude, and there is basically no building or other obstacle between the aerial UE and the ground base station to block them. The communication between them is line of sight (LOS) transmission, and the interference power is very strong, which causes serious interference of SRS sent by UEs in different cells, reduces the channel estimation quality, and further reduces the throughput, affecting the communication performance.

[0006] Therefore, how to reduce the interference of SRS between cells needs to be solved. SUMMARY

[0007] The application provides a communication method and a communication device, which can reduce the interference of inter-cell SRS.

[0008] In a first aspect, a communication method is provided, which is applied to a terminal device and includes: generating a first channel sounding reference signal (SRS) sequence, the first SRS sequence being associated with a first cell, the first cell being a serving cell of the terminal device; and sending the first SRS sequence to a network device.

[0009] Based on the above scheme, by associating the first SRS sequence with the first cell, the SRS sequence generated and sent by the terminal device serving the first cell can be different from that of other cells, so that the terminal device serving the first cell can send the first SRS sequence associated with the first cell. The network device can distinguish the received first SRS sequence and determine whether the received first SRS sequence belongs to the cell managed by the network device. If the first cell belongs to the cell managed by the network device and the first SRS sequence is associated with the first cell, the network device can use the first SRS sequence for subsequent operations (such as estimating the uplink channel quality, etc.); otherwise, the first SRS sequence is not used for subsequent operations. Thus, the SRS interference between cells can be reduced.

[0010] In combination with the first aspect, in some implementations of the first aspect, the sending of the first SRS sequence to the network device includes: sending the first SRS sequence to the network device through a first resource, the first resource being associated with the first cell.

[0011] Based on the above scheme, by associating the first resource used for sending the first SRS sequence with the first cell, the resource used by the first cell for sending the first SRS sequence can be different from that of other cells, so that the terminal device serving the first cell can send the first SRS sequence on the first resource associated with the first cell. Correspondingly, the network device can further distinguish whether the first SRS sequence received on the first resource belongs to the cell managed by the network device. If the first cell is the cell managed by the network device, at this time, not only the first SRS sequence is associated with the first cell, but also the first resource is associated with the first cell. When the network device receives the first SRS sequence through the first resource, it can further determine to use the first SRS sequence for subsequent operations, thereby further reducing the SRS interference between cells.

[0012] In combination with the first aspect, in some implementations of the first aspect, the first resource corresponds to a first comb offset initial value the first comb offset initial value satisfies the following condition: the first comb offset initial value satisfies the following condition: X is an integer greater than or equal to 2, ID of the first cell.

[0013] Based on the above scheme, the first resource corresponds to the first comb offset, and the first comb offset is associated with the ID of the first cell, so that the first resource for sending the first SRS sequence is also associated with the first cell, improving the process of associating the first resource with the first cell, and further reducing the SRS interference between cells.

[0014] In combination with the first aspect, in some implementations of the first aspect, the value of X is determined according to at least one of the following parameters: the number of antenna ports used by the terminal device to send SRS, the comb value K used by the terminal device to send SRS TC .

[0015] The number of antenna ports used by the terminal device to send SRS, the comb value K used by the terminal device to send SRS TC may be protocol predefined or network device indicated.

[0016] Based on the above scheme, X for determining the initial value of the first comb offset can be determined according to the number of antenna ports used by the terminal device to send SRS and / or the comb value used by the terminal device to send SRS, further improving the process of associating the initial value of the first comb offset with the first cell, and further improving the process of associating the first resource with the first cell, thereby further reducing the SRS interference between cells.

[0017] In combination with the first aspect, in some implementations of the first aspect, the first SRS sequence is generated, including: generating the first SRS sequence according to the first parameter, the first parameter being associated with the first cell.

[0018] Based on the above scheme, the first SRS sequence is generated according to the first parameter, and the first parameter is associated with the first cell, so that the generated first SRS sequence is associated with the first cell, improving the process of associating the first SRS sequence with the first cell, and further reducing the SRS interference between cells.

[0019] In combination with the first aspect, in some implementations of the first aspect, the first parameter includes a cyclic shift initial value The satisfies Y is an integer greater than or equal to 1, ID of the first cell.

[0020] Based on the above scheme, the first parameter includes a cyclic shift initial value satisfies The ID of the first cell, so that the cyclic shift initial value is associated with the first cell ID, and because the first SRS sequence is generated according to the first parameter, the generated first SRS sequence is associated with the first cell, the process of associating the first SRS sequence with the first cell is improved, and the subsequent reduction of inter-cell SRS interference is further ensured.

[0021] In combination with the first aspect, in some implementations of the first aspect, the value of Y is determined according to at least one of the following parameters: the number of antenna ports used by the terminal device to send the SRS, the maximum cyclic shift number used by the terminal device to generate the SRS The comb value K used by the terminal device to send the SRS TC .

[0022] The number of antenna ports used by the terminal device to send the SRS, the maximum cyclic shift number used by the terminal device to generate the SRS The comb value K used by the terminal device to send the SRS TC The value of Y can be predefined by a protocol or indicated by a network device.

[0023] Based on the above scheme, the X of the cyclic shift initial value can be determined according to the number of antenna ports used by the terminal device to send the SRS and / or the comb value used by the terminal device to send the SRS and / or the maximum cyclic shift number used by the terminal device to generate the SRS It is determined that, since the first parameter includes the cyclic shift initial value, the process of associating the first parameter with the first cell is improved. Because the first SRS sequence is generated according to the first parameter, the process of associating the first resource with the first cell is further improved, thereby further reducing the inter-cell SRS interference.

[0024] The second aspect provides a communication method applied to a network device, comprising: receiving a first SRS sequence from a terminal device, the first SRS sequence being associated with a first cell, and the first cell being a serving cell of the terminal device.

[0025] The beneficial effects of the second aspect and any one of the possible implementation manners of the second aspect can refer to the above-mentioned first aspect.

[0026] In combination with the second aspect, in some implementations of the second aspect, the receiving the first SRS sequence from the terminal device comprises: receiving the first SRS sequence from the terminal device through a first resource, and the first resource being associated with the first cell.

[0027] In combination with the second aspect, in some implementations of the second aspect, the first resource corresponds to a first comb offset initial value The The following conditions are met: X is an integer greater than or equal to 2, is an ID of the first cell.

[0028] In some implementations of the second aspect, a value of the X is determined according to at least one of: a number of antenna ports used by the terminal device to transmit the SRS, a comb value K used by the terminal device to transmit the SRS TC .

[0029] In some implementations of the second aspect, the first SRS sequence is generated according to a first parameter, the first parameter being associated with the first cell.

[0030] In some implementations of the second aspect, the first parameter comprises a cyclic shift initial value the satisfies Y is an integer greater than or equal to 1, is an ID of the first cell.

[0031] In some implementations of the second aspect, a value of the Y is determined according to at least one of: a number of antenna ports used by the terminal device to transmit the SRS, a maximum cyclic shift number used by the terminal device to generate the SRS a comb value K used by the terminal device to transmit the SRS TC .

[0032] In a third aspect, a communication apparatus is provided, comprising: a transceiver, which can perform the receiving and transmitting processing in the first aspect; and a processing unit, which can perform other processing in the first aspect except for the receiving and transmitting.

[0033] In a fourth aspect, a communication apparatus is provided, comprising: a transceiver, which can perform the receiving and transmitting processing in the second aspect; and a processing unit, which can perform other processing in the second aspect except for the receiving and transmitting.

[0034] In a fifth aspect, a communication apparatus is provided, comprising a processor configured to execute a computer program, so that the communication apparatus performs the method in the first aspect to the second aspect and any possible implementation thereof.

[0035] Optionally, the processor is one or more.

[0036] Optionally, the communication apparatus further comprises a memory configured to store the computer program, the memory being one or more.

[0037] Optionally, the memory can be integrated with the processor, or the memory is arranged separately from the processor, or the memory is located in the processor.

[0038] Optionally, the communication apparatus further comprises a transceiving circuit, such as a transceiver or an input / output circuit.

[0039] In a sixth aspect, a communication system is provided, comprising: a terminal device and a network device, the terminal device is configured to perform the method in the possible implementation manners of the first aspect, and the network device is configured to perform the method in the possible implementation manners of the second aspect.

[0040] In a seventh aspect, a computer readable storage medium is provided, the computer readable storage medium stores a computer program or code, when the computer program or code is run on a computer, the computer program or code causes the computer to perform the method in any one of the possible implementation manners of the first aspect to the second aspect.

[0041] In an eighth aspect, a chip is provided, comprising at least one processor, the processor is configured to run a computer program, so that the device installed with the chip performs the method in any one of the possible implementation manners of the first aspect to the second aspect.

[0042] Optionally, the chip can comprise an output circuit or interface for sending information or data, and an input circuit or interface for receiving information or data.

[0043] In a ninth aspect, a computer program product is provided, the computer program product comprises: computer program code, when the computer program code is run on a communication apparatus, the computer program code causes the apparatus to perform the method in any one of the possible implementation manners of the first aspect to the second aspect.

[0044] Optionally, the chip can comprise an input circuit or interface for sending information or data, and an output circuit or interface for receiving information or data. BRIEF DESCRIPTION OF DRAWINGS

[0045] Fig. 1 is a schematic diagram of the architecture of a communication system 100 suitable for embodiments of the present application.

[0046] Fig. 2 is a schematic diagram of 8 antenna port SRS resource mapping.

[0047] Fig. 3 is a schematic diagram of interference generated between SRS transmitted by UEs in different cells.

[0048] Fig. 4 is a schematic flowchart of a communication method 200 provided by embodiments of the present application.

[0049] Fig. 5 is a schematic flowchart of a communication method 300 provided by embodiments of the present application.

[0050] Figure 6 is a schematic flow chart of a communication method 400 according to an embodiment of the application.

[0051] Figure 7 is a schematic block diagram of a communication device 1000 according to an embodiment of the application.

[0052] Figure 8 is a schematic block diagram of a communication device 2000 according to an embodiment of the application.

[0053] Figure 9 is a block diagram of an example of a baseband hardware implementation according to an embodiment of the application.

[0054] Figure 10 is a schematic block diagram of a chip system 3000 according to an embodiment of the application. DETAILED DESCRIPTION

[0055] The technical solutions in the application will be described below with reference to the drawings.

[0056] The various numbers such as first, second, #1, #2, etc. are only used for differentiation for convenience of description, and are not used to limit the scope of the embodiments of the present application, nor to represent the order or importance. For example, the numbers are used to differentiate different SRS sequences, different resources, etc. The “predefined” can be implemented by pre-storing corresponding codes, tables or other means for indicating relevant information in the device, and the specific implementation manner is not limited in the present application. The “protocol” can refer to a standard protocol in the communication field, which can include long term evolution (LTE) protocol, NR protocol, and relevant protocols applied in future communication systems, and the present application is not limited thereto. The words “example”, “for example”, “exemplary”, “as an example” are used to indicate an example, illustration or description. Any embodiment or design scheme described as “example” in the present application should not be interpreted as more preferred or more advantageous than other embodiments or design schemes. The terms “include”, “contain”, “have” and their variants mean “including but not limited to”, unless otherwise specifically emphasized. “At least one” refers to one or more, and “multiple” refers to two or more. The “and / or” describes the association relationship of the associated objects, which means that there can be three relationships, for example, A and / or B can represent the following three cases: A exists alone, A and B exist together, and B exists alone, where A and B can be singular or plural. The character “ / ” generally represents an “or” relationship between the associated objects. The description related to the sending of messages, information or data by network element A to network element B, and the receiving of messages, information or data from network element A by network element B, is intended to indicate which network element the messages, information or data are sent to, and does not limit whether they are directly sent or indirectly sent via other network elements. “For indicating” can include direct indication and indirect indication. When describing that certain indication information is used to indicate A, it can include that the indication information directly indicates A or indirectly indicates A, and it does not mean that A must be carried in the indication information. “When”, “in the case of”, “if” and the like all refer to the objective situation in which the device will make corresponding processing, and are not limited to time, nor require the device to have a judgment action when implemented, nor mean that there are other limitations.

[0057] The technical solutions of the embodiments of the present application can be applied to various communication systems, including but not limited to: a 4th generation (4G) system or a 5G system or a NR system, an LTE system, a long term evolution-advanced (LTE-A) system, a wireless local area network (WLAN) system, a satellite communication system, an optical communication system, a microwave communication system, and the like. It can also be applied to future communication systems, such as a fusion system of multiple systems, and the like. In addition, it 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 an internet of things (IoT) communication system or other communication systems. In addition, it can also be extended to similar wireless communication systems, such as wireless-fidelity (Wi-Fi), worldwide interoperability for microwave access (WIMAX), and a 3rd generation partnership project (3GPP) related communication system, and the like, without limitation.

[0058] A device in a communication system can send a signal to another device or receive a signal from another device. The signal can include information, signaling, or data, and the like. The device can also be replaced by an entity, a network entity, a communication device, a communication module, a node, a communication node, and the like. The device is taken as an example for description in the present application. For example, the communication system can include at least one terminal device and at least one network device. The network device can send a downlink signal to the terminal device, and / or the terminal device can send an uplink signal to the network device.

[0059] The terminal device in the embodiments of the present application includes various devices with wireless communication functions, which can be used to connect people, things, machines, etc. The terminal device can be widely used in various scenarios, such as: cellular communication, D2D, V2X, peer to peer, M2M, MTC, IoT, virtual reality (VR), augmented reality (AR), industrial control, autonomous driving, remote medical treatment, smart power grid, smart furniture, smart office, smart wear, intelligent transportation, smart city unmanned aerial vehicle, robot, remote sensing, passive sensing, positioning, navigation and tracking, autonomous delivery, etc. The terminal device can be a terminal in any of the above scenarios, such as an MTC terminal, an IoT terminal, etc. The terminal device can be a user equipment, terminal, fixed device, mobile station device or mobile device, subscriber unit, handheld device, vehicle-mounted device, wearable device, cellular phone, smart phone, session initialization protocol (SIP) phone, wireless data card, personal digital assistant (PDA), computer, tablet computer, notebook computer, wireless modem, handset, laptop computer, computer with wireless transceiver function, smart book, vehicle, satellite, global positioning system (GPS) device, target tracking device, aircraft (such as unmanned aerial vehicle, helicopter, multi-helicopter, four-helicopter, or airplane, etc.), ship, remote control device smart home device, industrial device, or device built-in in the above devices (such as communication module, modem or chip in the above devices, etc.), or other processing devices connected to the wireless modem. For the sake of convenience, the terminal device will be described as an example of terminal or UE hereinafter.

[0060] It should be understood that in some scenarios, the UE can also be used to act as a base station. For example, the UE can act as a scheduling entity which provides sidelink signals between UEs in V2X, D2D or peer to peer scenarios, etc.

[0061] In the embodiments of the present application, the apparatus for implementing the function of the terminal device can be a terminal device, or can be an apparatus capable of supporting the terminal device to implement the function, for example, a chip system or a 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 can include a chip and other discrete devices.

[0062] The network device in the embodiments of the present application can be a device for communicating with the terminal device, and can also be referred to as an access network device or a radio access network device, for example, the network device can be a base station. The network device in the embodiments of the present application can refer to a radio access network (RAN) node (or device) for accessing the terminal device to a wireless network. The base station can broadly cover various names in the following or be replaced by the following names, such as: Node B (NodeB), evolved Node B (eNB), next generation Node B (gNB), relay station, access point, transmitting and receiving point (TRP), transmitting point (TP), primary station, secondary station, 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), radio unit (RU), positioning node, RAN intelligent controller (RIC), etc. The base station can be a macro base station, a micro base station, a relay node, a donor node or the like, or a combination thereof. The base station can also refer to a communication module, modem or chip for being arranged in the foregoing devices or apparatuses. The base station can also be a mobile switching center and a device assuming a base station function in D2D, V2X, M2M communication, a network side device in a future communication network, a device assuming a base station function in a future communication system, etc. The base station can support networks of the same or different access technologies. The embodiments of the present application do not limit the specific technologies and specific device forms adopted by the network device.

[0063] A base station can be fixed, or mobile. For example, a helicopter or drone can be configured to act as a mobile base station, with one or more cells moving according to 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.

[0064] In some deployments, the network device mentioned in embodiments of the present application can be a device including a CU, or a DU, or a device including a CU and a DU, or a control plane CU node (central unit-control plane (CU-CP)) and a user plane CU node (central unit-user plane (CU-UP)) and a DU node. For example, the network device can include a gNB-CU-CP, a gNB-CU-UP and a gNB-DU.

[0065] In some deployments, wireless access is assisted for a terminal by multiple RAN nodes cooperating, and different RAN nodes respectively implement part of the functions of a base station. For example, a RAN node can be a CU, a DU, a CU-CP, a CU-UP, or an RU, etc. The CU and the DU can be separately arranged, or can also be included in the same network element, such as a BBU. The RU can be included in a radio frequency device or a radio frequency unit, such as an RRU, an AAU or an RRH. In a possible design, a processing unit in a BBU for implementing baseband functions is referred to as a base band high (BBH) unit, and a processing unit in an RRU / AAU / RRH for implementing baseband functions is referred to as a base band low (BBL) unit. In different systems, the CU (or CU-CP and CU-UP), the DU or the RU can also have different names, but those skilled in the art can understand their meanings. For example, the radio access network can also be an open radio access network (O-RAN) architecture, and in an O-RAN system, the CU can also be referred to as an O-CU, the DU can also be referred to as an O-DU, the CU-CP can also be referred to as an O-CU-CP, the CU-UP can also be referred to as an O-CU-UP, and the RU can also be referred to as an O-RU. Any of the CU (or CU-CP, CU-UP), the DU and the RU in the present application can be implemented by a software module, a hardware module, or a combination of a software module and a hardware module.

[0066] In an embodiment of the present application, the apparatus for implementing the function of the network device can be a network device, or can be an apparatus capable of supporting the network device to implement the function, such as a chip system or a chip, which can be installed in the network device. In an embodiment of the present application, the chip system can be composed of a chip, or can include a chip and other discrete devices.

[0067] The network device and the terminal device can be deployed on land, including indoors or outdoors, handheld or vehicle-mounted; can also be deployed on water surface; and can also be deployed on aircraft, balloons and satellites in the air. The scenario where the network device and the terminal device are located is not limited in the embodiments of the present application. In addition, the terminal device and the network device can be hardware devices, or can be software functions running on special hardware, software functions running on general hardware, such as virtualized functions instantiated on a platform (for example, a cloud platform), or entities including special or general hardware devices and software functions. The specific form of the terminal device and the network device is not limited in the present application.

[0068] The scenarios to which the present application can be applied include, but are not limited to, an enhanced mobile broadband (eMBB) scenario, an ultra-reliable low latency communication (URLLC) scenario, an M2M communication scenario, a massive machine type communication (mMTC) scenario, an uplink centric broadband communication (UCBC) scenario, a real-time broadband communication (RTBC) scenario, and the like, without limitation.

[0069] For ease of understanding, the communication system to which the embodiments of the present application are applicable is introduced below. It should be understood that the following communication system is only an example, and the communication system to which the present application is applicable is not limited to this.

[0070] FIG. 1 is a schematic diagram of an architecture of a communication system 100 applicable to the embodiments of the present application. As shown in FIG. 1, the communication system 100 includes a wireless access network 100. The wireless access network 100 can be a next generation (for example, a future communication network or a higher version) wireless access network, or a conventional (for example, 5G, 4G, 3G or 2G) wireless access network. One or more terminal devices (120a-120j, collectively referred to as 120) can be connected to each other or connected to one or more network devices (110a, 110b, collectively referred to as 110) in the wireless access network 100.

[0071] In the communication system, the network device can send downlink data to the terminal device, and the terminal device can also send uplink data to the network device. It should be understood that the embodiments of the present application can be applicable to a communication system with uplink and downlink communication links, and can be applicable not only to uplink signal transmission but also to downlink signal transmission. For downlink signal transmission, the sending device is the network device, and the corresponding receiving device is the terminal device. For uplink signal transmission, the sending device is the terminal device, and the corresponding receiving device is the network device. The embodiments of the present application do not limit the transmission direction of the signal.

[0072] In practical applications, the wireless communication system can include multiple network devices at the same time, or multiple terminal devices at the same time, without limitation. One network device can serve one or more terminal devices at the same time. One terminal device can also access one or more network devices at the same time. The embodiments of the present application do not limit the number of terminal devices and network devices included in the wireless communication system.

[0073] Currently, urban air mobility (UAM) uses electric vertical take-off and landing (eVTOL) unmanned aerial vehicles to provide services in the fields of passenger transportation and logistics transportation. The unmanned aerial vehicles in the UAM system or the devices of passengers on the unmanned aerial vehicles communicate with gNBs on the ground through 5G NR.

[0074] Since the flight height of the aerial UE can reach between 150 meters and 600 meters, or even higher, there are basically no buildings or other obstacles between the aerial UE and the ground base station, so the communication between the aerial UE and the ground base station is LOS path transmission, which can cause serious interference between signals emitted by UEs in different cells.

[0075] In order to enable the ground base station to more accurately understand the channel state of the aerial UE, the aerial UE will send a channel sounding reference signal (SRS) in the uplink direction, and the base station estimates the uplink channel quality by receiving the SRS. In addition, based on the channel quality information provided by the SRS, the base station can also optimize the network resource allocation and scheduling strategy. For example, the base station can allocate resource blocks (RBs) with good instantaneous channel state to the uplink physical uplink shared channel (PUSCH) of the UE, and select different transmission parameters to improve network performance and user experience. The SRS also supports the base station to perform beamforming and interference coordination. By receiving the SRS and measuring its signal strength, the base station can also estimate the quality of the downlink channel, and optimize the direction and weight of the downlink beam accordingly, to improve the coverage and capacity of the network. Therefore, in order to achieve the above purposes, the aerial UE needs to send an SRS signal to the base station, or the cell managed by the base station, so the cell needs to independently configure SRS resources or SRS resource sets for the UEs served by the cell, so that the UEs in the cell use different code domain cyclic shifts to generate SRS sequences with low cross-correlation, or use different frequency domain combs to stagger the positions of the SRS signals sent by the UEs in the frequency domain, thereby reducing the interference between the SRSs sent by the UEs in the cell.

[0076] The specific implementation of the cell using different frequency domain combs to stagger the positions of the SRS signals sent by the UEs in the frequency domain is described below.

[0077] Specifically, the frequency domain comb The calculation formula is as follows:

[0078] Wherein, combOffest is the initial value of the comb offset, which is included in the radio resource control (RRC) high layer parameter "transmissionComb", and can take values (0,…,K TC -1), which can be expressed by the formula Frequency domain comb parameter configuration of frequency domain comb offset initial value plays a key role in a wireless communication system, especially in SRS configuration of 5G NR. This parameter determines the starting position of SRS signal in the frequency domain, thereby affecting the transmission and reception performance of SRS signal. In the actual communication system, there are multiple UEs serving a cell, and these multiple different UEs may need to send SRS signals at the same time. In order to ensure the orthogonality between these SRS signals, different frequency domain resources need to be allocated to each UE. The purpose of maintaining orthogonality is to distinguish the SRS signals sent by different UEs. In other words, maintaining orthogonality between different SRS signals can facilitate distinguishing the different SRS signals. The configuration of the frequency domain comb offset initial value can ensure that the SRS signals of different UEs occupy different comb positions in the frequency domain, thereby reducing the interference between SRS signals in the cell.

[0079] K in the above TC is a comb value, which can be indicated by the RRC higher layer parameter "transmissionComb", and can be 2, 4 or 8, which is expressed by the formula K TC ∈{2,4,8}. This represents the transmission density of SRS, i.e., transmitting SRS once every how many subcarriers. For example, when K TC =2, it means transmitting SRS once every 2 subcarriers, and the comb offset initial value can be 0 or 1. If 0, the UE transmits SRS on the first subcarrier; if 1, the UE transmits SRS on the second subcarrier.

[0080] In addition, is the port index corresponding to SRS. is the number of antenna ports for transmitting SRS, is the maximum cyclic shift number, which corresponds to the comb value, and can be 8, 12, 6, which is expressed by the formula is the cyclic shift initial value, which is included in the higher layer parameter "transmissionComb", and can be which is expressed by the formula For details, see the description of the maximum cyclic shift number and the cyclic shift initial value below.

[0081] The specific implementation of using different code domain cyclic shifts of UEs in a cell to generate SRS sequences with low cross-correlation is described below.

[0082] Specifically, the calculation formula of code domain cyclic shift is as follows:

[0083] wherein, for the cyclic shift initial value, The cyclic shift initial value in the code domain cyclic shift parameter configuration plays a key role in the generation and configuration of SRS in a wireless communication system, especially in 5G NR. The cyclic shift initial value determines the starting cyclic shift amount on the code domain of the SRS sequence. By adjusting the initial value, the starting position of the SRS sequence on the code domain can be changed. The cyclic shift operation is to move the bits in the sequence to the left or right by a certain number (determined by the cyclic shift initial value) of positions, and the moved bits are circularly returned to the other end of the sequence, thereby obtaining a new sequence. The configuration of the cyclic shift initial value can ensure that the SRS sequences generated by different UEs have certain orthogonality on the code domain, so that the base station can more easily distinguish the SRS signals from different UEs. By configuring different cyclic shift initial values for UEs in a cell, SRS sequences with low cross-correlation can be generated, thereby reducing the interference between SRS sequences generated by UEs in the cell.

[0084] The above for the maximum cyclic shift number, for the SRS port index, for the SRS transmit antenna port number. As can be seen from the above, the maximum cyclic shift number and the comb value K TC correspond one-to-one, and the correspondence between the maximum cyclic shift number and the comb number is shown in Table 1.

[0085] Table 1

[0086] As can be seen from the above description, the base station can determine the position of the SRS on the code domain by configuring the cyclic shift initial value of the UE in the cell managed by the base station, and determine the position of the SRS on the frequency domain by configuring the comb offset initial value. Therefore, it is necessary to map the SRS to resources. The SRS signal needs to be sent out through the antenna port. As can be seen from the above formula for calculating the frequency domain comb and the code domain cyclic shift, the SRS is related to the number of antenna ports. For an antenna port used to send an SRS, different SRSs correspond to different frequency domain combs and code domain cyclic shifts, that is, different antenna ports used by different SRSs correspond to different frequency domain combs and code domain cyclic shifts.

[0087] Figure 2 is a schematic diagram of SRS mapping corresponding to 8 antenna ports. Comb0 and Comb1 represent that there are 2 frequency domain combs available, CS0~CS7 represent that there are 8 code domain cyclic shifts available. The grey blocks represent which frequency domain comb and which code domain cyclic shift are used by the SRS corresponding to P0~P7, the 8 antenna ports. For example, the SRS corresponding to P0 antenna port is mapped to CS0 and Comb0, or the SRS corresponding to the first antenna port uses the first frequency domain comb and the first code domain cyclic shift. The examples of the frequency domain comb and the code domain cyclic shift corresponding to the remaining ports are shown in Figure 2, and will not be described one by one here.

[0088] As can be seen from the above, the comb offset initial value and the cyclic shift initial value can be indicated by the RRC high layer parameter "transmissionComb" issued by the cell, and the parameter is configured independently by each cell. Therefore, this can only avoid the interference between the SRSs of the UEs in the cell, that is, the interference between the SRSs simultaneously transmitted by the UEs in the cell is small. However, since the SRS resources are configured independently by each cell, the same SRS or the same resource used for transmitting the SRS may be configured in different cells. Therefore, the interference between the SRSs transmitted by the UEs in different cells cannot be avoided, and the SRS interference between the cells cannot be effectively reduced.

[0089] Figure 3 is a schematic diagram of the interference between the SRSs transmitted by the UEs in different cells. As shown in Figure 2, UE#1 accesses cell#1 or base station#1. In mobile communication, a cell is a basic unit of wireless coverage, and a wireless signal coverage is provided by one or more sectors of a base station. One base station (for example, base station#1) can manage multiple cells, and each cell corresponds to one or more sectors, for example, the largest sector (for example, cell#1) shown in Figure 2. Similarly, UE#2 accesses cell#2 or base station#2. In other words, UE#1 is a UE served by base station#1 or cell#1, and UE#2 is a UE served by base station#2 or cell#2. In Figure 2, base station#1 receives the SRS transmitted by UE#1 serving base station#1, and at the same time, the SRS transmitted by UE#2 can also be received on the same time-frequency resource. In addition, since the SRSs transmitted by the UEs in cell#1 and cell#2 are independently configured by the cells, the SRSs received by base station#1 from UE#1 and UE#2 can be the same SRS. Therefore, the SRS transmitted by UE#2 can interfere with the SRS transmitted by UE#1 to base station#1, especially for the UAM scenario. The interference power between UE#2 and cell#1 is very strong in the LOS path propagation, resulting in serious interference between the SRSs transmitted by the UEs in different cells, which can reduce the channel estimation quality and further reduce the throughput, and affect the communication performance.

[0090] Therefore, how to reduce the interference of inter-cell SRS is urgent to be solved.

[0091] Based on the above technical status, the present application proposes a communication method. By associating a first SRS sequence with a first cell, the SRS sequence generated and sent by a terminal device serving the first cell can be different from other cells. The terminal device serving the first cell can send the first SRS sequence associated with the first cell. The network device can distinguish the received first SRS sequence, and determine whether the received first SRS sequence belongs to the cell managed by the network device. If the first cell belongs to the cell managed by the network device, and the first SRS sequence is associated with the first cell, the network device can use the first SRS sequence for subsequent operations (such as estimating uplink channel quality, etc.); otherwise, the first SRS sequence is not used for subsequent operations. Thus, the SRS interference between cells can be reduced.

[0092] FIG. 4 is a schematic flow chart of a communication method 200 provided by an embodiment of the present application. As shown in FIG. 4, the method 200 can include the following steps.

[0093] S210, a terminal device generates a first SRS sequence, the first SRS sequence being associated with a first cell, the first cell being a serving cell of the terminal device.

[0094] In one way, the terminal device generates the first SRS sequence, including: generating the first SRS sequence according to a first parameter, the first parameter being associated with the first cell.

[0095] Specifically, the terminal device generates the first SRS sequence according to the following formula:

[0096] wherein, is the length of the first SRS sequence, l' is the number of OFDM symbols occupied by the first SRS sequence in the time domain, is a type 1 low peak to average power ratio (PAPR) sequence, the type 1 PAPR sequence is usually designed based on a Zadoff-Chu (ZC) sequence or a variant thereof. The ZC sequence is a sequence with constant envelope characteristics, which is very suitable for reference signals in wireless communication systems, such as SRS, etc. i is a cyclic shift, δ = log2(K TC ), as can be seen from the above, K TC is the transmission comb number that can be indicated by the high-level parameter "transmissionComb", K TCK TC Also can be protocol predefined. u is group number, u ∈ {0, 1, …, 29}, v is base sequence number within the group.

[0097] If the high layer parameter "nrofSRS-Ports-n8" is equal to "ports8tdm", then

[0098] Otherwise,

[0099] Wherein, the high layer parameter "nrofSRS-Ports-n8" is used to configure the number of antenna ports for transmitting SRS, and "ports8tdm" represents supporting 8 time division multiplexing (TDM) antenna ports.

[0100] The first SRS sequence or the antenna port p i Corresponding cyclic shift α i The calculation formula is as follows:

[0101] Wherein, The calculation formula of is shown in the above formula (2), which is not repeated here. The maximum cyclic shift number in the calculation formula The corresponding relationship between the comb value K TC is shown in Table 1, Indicates the SRS port index within 1 symbol, that is, the antenna port index used for transmitting SRS within 1 symbol, Indicates the number of SRS ports within 1 symbol, that is, the number of antenna ports used for transmitting SRS within 1 symbol.

[0102] It should be understood that the SRS sequence needs to be transmitted through the antenna port, and it can also be seen from the above formula for generating the SRS sequence that the generated SRS sequence is related to the antenna port p i , so different SRS sequences correspond to different cyclic shifts α i , and different SRS sequences correspond to different antenna ports, so different antenna ports correspond to different cyclic shifts α i . For example, the first SRS sequence corresponds to the cyclic shift α i , that is, the antenna port p i corresponding to the first SRS sequence corresponds to the cyclic shift α i . The antenna port corresponding cyclic shift α iOr the starting position of the antenna port in the frequency domain, it can be understood that the first SRS sequence corresponding to the cyclic shift a transmitted through the antenna port i Or the starting position of the first SRS sequence in the frequency domain.

[0103] From the above calculation formula (5), it can be seen that the generation of the first SRS sequence is related to the cyclic shift a i And a i Can also be determined according to That is, the first SRS sequence can be determined according to the code domain cyclic shift . The calculation formula of a

[0104] It should be noted that the first parameter can be Or it can be Or it can be the cyclic shift a i Or it can be the code domain cyclic shift And so on, those skilled in the art can know that the first parameter can determine the SRS sequence, and because different SRS sequences can be determined according to different code domain cyclic shifts Therefore, the parameters including the code domain cyclic shift In the right side of the formula (3) for determining the first SRS sequence can be regarded as an example of the first parameter, which is not limited by the present application.

[0105] As can be seen from the above calculation formula (2) of the code domain cyclic shift , Is related to the cyclic shift initial value a , that is, a Can be determined according to the cyclic shift initial value a And Can determine the first SRS sequence, so the terminal device can determine the first SRS sequence according to the cyclic shift initial value a It can be understood that the cyclic shift initial value a Can also be an example of the first parameter.

[0106] In one way, the first parameter includes the cyclic shift initial value a Satisfies Y is an integer greater than or equal to 1, Is the identity (indentity, ID) (or index, identifier, etc.) of the first cell.

[0107] In one way, the value of Y can be preset. For the maximum cyclic shift Or Or The same Y can be set, or different Ys can be set, which are not limited in the present application.

[0108] In one mode, the value of Y is determined according to at least one of the following parameters: the number of antenna ports used by the terminal device to send SRS, the maximum cyclic shift number used by the terminal device to generate SRS The comb value K used by the terminal device to send SRS TC In other words, the value of Y is related to the number of antenna ports used to send SRS and / or the maximum cyclic shift number And / or related to the comb value K TC .

[0109] Wherein, the number of antenna ports used by the terminal device to send SRS, the maximum cyclic shift number used by the terminal device to generate SRS The comb value K used by the terminal device to send SRS TC May be protocol predefined, or network device indicated.

[0110] It should be understood that the terminal device needs to send the generated SRS through the antenna port, so within one symbol, the terminal device can generate multiple mutually orthogonal SRSs, each SRS (for example, the first SRS sequence) is sent through an antenna port, so the number of antenna ports sending SRS needs to be determined. In addition, the terminal device can determine the SRS when generating it according to formula (3), and α i In formula (3) can be determined according to And According to formula (2), the maximum cyclic shift number Therefore, the terminal device needs to use the maximum cyclic shift number That is, the maximum cyclic shift number used by the terminal device to generate SRS Similarly, the terminal device can determine the starting position of the sent SRS in the frequency domain according to formula (1), and the frequency domain comb In formula (1) needs to determine the comb value K TC Therefore, the terminal device needs to use the comb value K TC When determining the starting position of the SRS in the frequency domain during the process of sending the SRS, that is, the comb value K used by the terminal device to send SRS TC .

[0111] Specifically, Y can represent the number of cells that can be supported to be orthogonal, for example, when the maximum cyclic shift number is 8 (as shown in column CS0-CS7 in FIG. 2) and the antenna port is 2, if one cell occupies 2 cyclic shifts, then the maximum number of cells that can be supported to be orthogonal is Y=8 / 2=4; for another example, when the maximum cyclic shift number is 6 and the antenna port is 4, if one cell occupies 2 cyclic shifts, then the maximum number of cells that can be supported to be orthogonal is Y=6 / 2=3. Examples of the value of Y are as follows, which will not be described here.

[0112] Exemplarily, when 2 antenna ports are used to send SRS, that is, As can be seen from the above, K TC ∈{2,4,8}, and the cyclic shift value K TC There is a corresponding relationship, as shown in Table 1, so the maximum cyclic shift number Therefore, the value of Y and the initial value of the cyclic shift Examples are as follows:

[0113] (1) For the maximum cyclic shift number or for the comb value K TC =2, Y=4, then

[0114] (2) For the maximum cyclic shift number or for the comb value K TC =4, Y=6, then

[0115] (3) For the maximum cyclic shift number or for the comb value K TC =8, Y=3, then

[0116] Exemplarily, when 4 antenna ports are used to send SRS, that is, Examples of the value of Y and the initial value of the cyclic shift are as follows:

[0117] (1) For the maximum cyclic shift number or for the comb value K TC =2, Y=2, then

[0118] (2) For the maximum cyclic shift number or for the comb value K TC =4, Y=3, then

[0119] (3) For the maximum cyclic shift number or for the comb value K TC= 8, Y = 3, then

[0120] Exemplarily, when the SRS is sent using 8 antenna ports, that is, N = 8, the SRS sequence is generated according to the following formula: The value of Y and the initial value of the cyclic shift For example, the following:

[0121] (1) For the maximum cyclic shift number or for the comb value K TC = 2, Y = 1, then

[0122] (2) For the maximum cyclic shift number or for the comb value K TC = 4, Y = 3, then

[0123] (3) For the maximum cyclic shift number or for the comb value K TC = 8, Y = 3, then

[0124] Based on the above scheme, the initial value of the SRS code domain cyclic shift is associated with the ID of the cell, so that the initial value of the SRS code domain cyclic shift configured by different cells is different, and the terminal device served by different cells can generate different SRS sequences, so that the terminal device served by different cells sends different SRS sequences, avoids the terminal device served by different cells sending the same SRS sequence, reduces the correlation of the SRS sequences between different cells, and thus can reduce the SRS interference between cells.

[0125] S220, the terminal device maps the first SRS sequence to the first resource.

[0126] In an implementation manner, the first resource is associated with the first cell.

[0127] In an implementation manner, the first resource includes a first frequency domain resource, and the first frequency domain resource is associated with the first cell. The terminal device maps the first SRS sequence to the first frequency domain resource. The first frequency domain resource is an example of the first resource.

[0128] Specifically, mapping the first SRS to the first frequency domain resource includes that the terminal device determines the starting position of the first SRS sequence in the frequency domain, that is, determines the frequency domain resource (for example, the first frequency domain resource) to which the first SRS sequence is mapped. Since the SRS sequence corresponds to the antenna port, the terminal device can determine the starting position of the antenna port p i in the frequency domain.

[0129] It can be understood that the frequency domain resource range used by the SRS sequence is determined by the starting position and the bandwidth. Once the starting position is determined, in combination with the bandwidth configuration of the SRS (such as 4-272 resource blocks (RBs)), the frequency domain resource range used by the SRS sequence can be determined. Therefore, there is a corresponding relationship between the starting position of the SRS sequence in the frequency domain and the frequency domain resource used by the SRS sequence. The starting position defines the starting point of the SRS sequence in the frequency domain, for example, the first frequency domain resource can represent the frequency domain resource starting from the first starting position, or in other words, the first SRS sequence is mapped to the first frequency domain resource corresponding to the first starting position.

[0130] The terminal device can determine the starting position of the SRS sequence in the frequency domain through the above formula (1).

[0131] Exemplarily, the first frequency domain comb is determined according to the above formula (1) The first frequency domain comb After determining the first starting position of the first SRS sequence in the frequency domain, the terminal device can determine the antenna port p used to transmit the first SRS sequence i The first starting position in the frequency domain, that is, the first frequency domain resource corresponding to the first starting position is determined. Therefore, the first frequency domain resource corresponds to the first frequency domain comb

[0132] The calculation formula of the first frequency domain comb is shown in the above formula (1), and in the formula (1) is the port index used to transmit the SRS in one symbol, is the number of antenna ports used to transmit the SRS in one symbol. For the sake of brevity, it will not be repeated here.

[0133] In one way, the first frequency domain resource corresponds to the first comb offset initial value satisfies X is an integer greater than or equal to 2, is the ID of the first cell.

[0134] Exemplarily, it can be known from the formula (1) that the frequency domain comb is determined according to the comb offset initial value Therefore, the first frequency domain comb corresponds to the first comb offset initial value And the first frequency domain resource corresponds to the first frequency domain comb Therefore, the first frequency domain resource corresponds to the first comb offset initial value

[0135] In one way, the value of X can be preset. For the comb value K TC = 2 or K TC = 4 or K TC = 8, the same X or different X can be set, which is not limited in the present application.

[0136] In one way, the value of X is determined according to at least one of the following parameters: the number of antenna ports used by the terminal device to send SRS, the comb value K TC used by the terminal device to send SRS. In other words, the value of X is related to the number of antenna ports used to send SRS and / or the comb value K TC .

[0137] The number of antenna ports used by the terminal device to send SRS, and the comb value K TC used by the terminal device to send SRS can be protocol predefined or network device indicated.

[0138] Similar to the value of Y, X can represent the ability to support X cell orthogonality, but is determined according to the comb value, for example, the comb value is 2 (rows Comb0, Comb1 as shown in FIG. 2), and the antenna port is 2, if one cell occupies 1 comb value, then the maximum support X = 2 / 1 = 2 cell orthogonality; for example, the comb value is 4, and the antenna port is 2, if one cell occupies 1 comb value, then the maximum support X = 4 / 1 = 4 cell orthogonality. Examples of the value of X are as follows, which are not described here.

[0139] Exemplarily, when sending SRS using 2 antenna ports, that is, From the above, K TC ∈ {2, 4, 8}, so the value of X and the example of the initial value of the comb offset are as follows:

[0140] (1) For the comb value K TC = 2, X = 2, then

[0141] (2) For the comb value K TC = 4, X = 4, then

[0142] (3) For the comb value K TC = 8, X = 8, then

[0143] Exemplarily, when sending SRS using 4 antenna ports, that is, The value of X and the example of the initial value of the comb offset are as follows:

[0144] (1) For the comb value K TC= 2, X = 2, then

[0145] (2) for the comb value K TC = 4, X = 4, then

[0146] (3) for the comb value K TC = 8, X = 4, then

[0147] Exemplarily, when the SRS is sent using 8 antenna ports, that is, The value of X and the example of the initial value of the comb offset are as follows:

[0148] (1) for the comb value K TC = 2, X = 2, then

[0149] (2) for the comb value K TC = 4, X = 2, then

[0150] (3) for the comb value K TC = 8, X = 2, then

[0151] Based on the above scheme, the initial value of the comb offset of the SRS frequency domain comb is associated with the ID of the cell, so that the initial values of the SRS frequency domain combs configured by different cells are different, and the frequency domain resources to which the SRS sequence generated by the terminal device in the cell is mapped are different in different cells. Subsequently, the terminal devices in different cells send the SRS sequence on different frequency domain resources, thereby avoiding the terminal devices in different cells sending the SRS sequence on the same frequency domain resource, so as to reduce the SRS interference between cells.

[0152] It should be noted that only one example case in which the first frequency domain resource is the first resource is shown in S220, and the content included in the first resource is not limited thereto. For example, the first resource can also include a first time domain resource, or a first antenna port for sending the first SRS sequence, etc. Those skilled in the art can understand that the first time domain resource can also be associated with the first cell, or the first antenna port can also be associated with the first cell, etc. The present application is not limited thereto.

[0153] S230, the terminal device sends the first SRS sequence to the network device. Correspondingly, the network device receives the first SRS sequence from the terminal device.

[0154] In one manner, the terminal device sends the first SRS sequence to the network device via a first resource. Correspondingly, the network device receives the first SRS sequence from the terminal device via the first resource, the first resource being associated with the first cell, and the first resource including a first frequency domain resource.

[0155] The first SRS sequence can be generated into an analog signal, such as a first SRS signal, through an orthogonal frequency division multiplexing (OFDM) modulation process or the like.

[0156] It can be understood that the terminal device sends the first SRS sequence to the network device via the first resource, which can also be written as the terminal device sending a first SRS signal to the network device, and correspondingly, the network device receives the first SRS signal from the terminal device.

[0157] Optionally, the terminal device sends the first SRS signal to the network device via the first resource, and correspondingly, the network device receives the first SRS signal from the terminal device via the first resource. The first resource includes a first frequency domain resource.

[0158] It should be noted that the first cell can be a cell managed by the network device, or can not be a cell managed by the network device, that is, the network device managing the first cell can receive the first SRS sequence sent by the terminal device serving the first cell on the first resource, or the network device not managing the first cell can receive the first SRS sequence sent by the terminal device serving the first cell on the first resource. The present application does not limit whether the first cell is a cell managed by the network device.

[0159] It can be understood that since the first cell is associated with the first SRS sequence, only the network device managing the first cell is interested in the first SRS sequence, and further, since the first cell is associated with the first resource, the network device managing the first cell is more interested in the first SRS sequence received on the first resource, and the network device managing the first cell can subsequently use the first SRS sequence to estimate the uplink channel quality and the like. For the network device not managing the first cell, although it can also receive the first SRS sequence on the first resource, the first SRS sequence and the first resource are associated with the first cell, so the first SRS sequence received by the network device not managing the first cell is not of its interest, and it will not use the first SRS sequence for subsequent operations. Therefore, by associating the cell with the SRS sequence, the SRS interference between different cells can be reduced. Further, by associating the cell with the resource for transmitting the SRS sequence, the SRS interference between cells can be further reduced.

[0160] FIG. 5 is a schematic flow chart of a communication method 300 according to an embodiment of the present application.

[0161] FIG. 5 is a specific embodiment of FIG. 4. The communication method 300 is designed only for the association of the first SRS sequence with the first cell, and it should be understood that the first resource is not associated with the first cell in the embodiment, and the method 300 includes the following steps.

[0162] S310, the terminal device generates a first SRS sequence, the first SRS sequence being associated with a first cell, the first cell being a serving cell of the terminal device.

[0163] Specifically, the terminal device generates the first SRS sequence according to the above formula (3).

[0164] Referring to S210, the generation of the first SRS sequence is associated with the cyclic shift a i , and a i may be determined according to , that is, the first SRS sequence can be determined according to the cyclic shift initial value in the formula.

[0165] In one way, the association of the first SRS sequence with the first cell includes that the cyclic shift initial value in the formula is associated with the ID of the first cell.

[0166] Specifically, the cyclic shift initial value in the formula is calculated according to the ID of the first cell. The cyclic shift initial value is an example of the first parameter.

[0167] The association relationship between the cyclic shift initial value and the ID of the first cell can be expressed by the following formula:

[0168] wherein, is the ID of the first cell. Y is an integer greater than or equal to 1, and the value of Y is related to the number of antenna ports used for transmitting the SRS and / or the maximum cyclic shift number and / or the comb value K TC .

[0169] For specific description, refer to S210, which will not be repeated here.

[0170] S320, the terminal device maps the first SRS sequence to a first resource, the first resource not being associated with the first cell.

[0171] In an embodiment, the first resource comprises a first frequency domain resource, and the first frequency domain resource is not associated with the first cell.

[0172] Referring to S220, the terminal device can determine the starting position of the first SRS sequence in the frequency domain by using the calculation formula (1) above, i.e., the terminal device can determine the first frequency domain resource corresponding to the starting position of the first SRS sequence in the frequency domain and map the first SRS sequence to the first frequency domain resource.

[0173] In an embodiment of the method 300, the first frequency domain resource is not associated with the first cell, i.e., the first comb offset value corresponding to the first frequency domain resource is not associated with the ID of the first cell.

[0174] For detailed description, refer to the process of determining the first frequency domain resource corresponding to the starting position of the first SRS sequence in the frequency domain in S220, which is not repeated here.

[0175] S330, the terminal device sends the first SRS sequence to the network device. Correspondingly, the network device receives the first SRS sequence from the terminal device.

[0176] In an embodiment, the terminal device sends the first SRS sequence to the network device through the first resource. Correspondingly, the network device receives the first SRS sequence from the terminal device through the first resource, the first SRS sequence is associated with the first cell, and the first resource is not associated with the first cell. The first resource comprises a first frequency domain resource.

[0177] The first SRS sequence can be generated into an analog signal, e.g., a first SRS signal, through an orthogonal frequency division multiplexing (OFDM) modulation process or the like.

[0178] It can be understood that the terminal device sends the first SRS sequence to the network device through the first resource, which can also be written as the terminal device sends the first SRS signal to the network device. Correspondingly, the network device receives the first SRS signal from the terminal device.

[0179] Optionally, the terminal device sends the first SRS signal to the network device through the first resource, and correspondingly, the network device receives the first SRS signal from the terminal device through the first resource. The first resource comprises a first frequency domain resource.

[0180] For detailed description, refer to S230, which is not repeated here.

[0181] FIG. 6 is a schematic flowchart of a communication method 400 according to an embodiment of the present application.​​

[0182] Figure 6 is one embodiment of Figure 4. The following describes the communication method 400 in which the first SRS sequence is not associated with the first cell in the embodiment of Figure 6. It should be understood that the first SRS sequence is not associated with the first cell in the embodiment. The method 400 includes the following steps.

[0183] S410, the terminal device generates a first SRS sequence, the first SRS sequence being not associated with a first cell, the terminal device being served by the first cell, the first cell being a serving cell of the terminal device.

[0184] In one embodiment, the terminal device can generate the first SRS sequence according to formula (3).

[0185] In the embodiment of the method 400, the first SRS sequence is not associated with the first cell, i.e., the cyclic shift initial value included in the first parameter is determined according to the first parameter when the first SRS sequence is generated. not associated with the ID of the first cell.

[0186] The process of generating the first SRS sequence can be referred to S210, which is not described here.

[0187] S420, the terminal device maps the first SRS sequence to a first resource, the first resource being associated with the first cell.

[0188] In one embodiment, the first resource includes a first frequency domain resource, the first frequency domain resource being associated with the first cell.

[0189] Referring to S220, the terminal device can determine the starting position of the first SRS sequence in the frequency domain by formula (1), i.e., the terminal device can determine the first frequency domain resource corresponding to the starting position of the first SRS sequence in the frequency domain. Since the starting position of the first SRS sequence in the frequency domain corresponds to the first frequency domain comb the first frequency domain comb corresponding to the first comb offset initial value Therefore, the first frequency domain resource corresponds to the first comb offset initial value The terminal device maps the first SRS sequence to the first frequency domain resource.

[0190] In one embodiment, the first frequency domain resource is associated with the first cell, including that the first comb offset initial value corresponding to the first frequency domain resource is associated with the ID of the first cell, the first comb offset initial value The association relationship between the first comb offset initial value and the ID of the first cell is represented by the following formula:

[0191] wherein, is an ID of the first cell. X is an integer greater than or equal to 2, and the value of X is determined according to the number of antenna ports used for sending the SRS and / or the comb value K TC about.

[0192] The specific description can be referred to S220, which is not described here.

[0193] S430, the terminal device sends the first SRS sequence to the network device. Correspondingly, the network device receives the first SRS sequence from the terminal device.

[0194] In one way, the terminal device sends the first SRS sequence to the network device through the first resource. Correspondingly, the network device receives the first SRS sequence from the terminal device through the first resource, the first SRS sequence is not associated with the first cell, and the first resource is associated with the first cell. The first resource includes a first frequency domain resource.

[0195] Wherein, the first SRS sequence can generate an analog signal, such as the first SRS signal, through the process of orthogonal frequency division multiplexing (OFDM) modulation and the like.

[0196] It can be understood that the terminal device sends the first SRS sequence to the network device through the first resource, which can also be written as the terminal device sends the first SRS signal to the network device, and correspondingly, the network device receives the first SRS signal from the terminal device.

[0197] Optionally, the terminal device sends the first SRS signal to the network device through the first resource, and correspondingly, the network device receives the first SRS signal from the terminal device through the first resource. The first resource includes a first frequency domain resource.

[0198] The specific description can be referred to S230, which is not described here.

[0199] The above provides a detailed description of the communication method provided by the present application. The communication device provided by the present application is introduced below.

[0200] In order to realize the functions of the communication device (such as network device, terminal device) in the embodiments of the present application, each communication device can realize the corresponding function through a hardware structure, a software module, or a hardware structure plus a software module.

[0201] Fig. 7 is a schematic block diagram of the communication device 1000 provided by the embodiments of the present application. As shown in Fig. 7, the device 1000 can include a transceiver unit 1010 and a processing unit 1020. The transceiver unit 1010 can communicate with the outside, and the processing unit 1020 is used for data processing, and the transceiver unit 1010 can also be called a communication interface or a transceiver unit.

[0202] Optionally, the apparatus 1000 further includes a storage unit, which can be used to store instructions and / or data. The processing unit 1020 can read the instructions and / or data in the storage unit, so as to enable the apparatus to implement the foregoing method embodiments.

[0203] For example, the apparatus 1000 is a terminal device, and can also be a communication apparatus applied to or matched with the terminal device, capable of implementing the method executed by the terminal device, such as a chip, a chip system or a circuit. For details, refer to the related description of the chip system shown in FIG. 10.

[0204] For example, the apparatus 1000 is a network device, and can also be a communication apparatus applied to or matched with the network device, capable of implementing the method executed by the network device, such as a chip, a chip system or a circuit. For details, refer to the related description of the chip system shown in FIG. 10.

[0205] In a possible design, the apparatus 1000 can implement the steps or procedures corresponding to those executed by the terminal device in the foregoing method embodiments, where the processing unit 1020 is configured to perform processing-related operations of the terminal device in the foregoing method embodiments, and the transceiver unit 1010 is configured to perform transceiving-related operations of the terminal device in the foregoing method embodiments.

[0206] For example, the transceiver unit 1010 is configured to send, to a network device, a first SRS sequence, and the processing unit 1020 is configured to generate the first SRS sequence, where the first SRS sequence is associated with a first cell, and the first cell is a serving cell of the terminal device.

[0207] In another possible design, the apparatus 1000 can implement the steps or procedures corresponding to those executed by the network device in the foregoing method embodiments, where the transceiver unit 1010 is configured to perform transceiving-related operations of the network device in the foregoing method embodiments, and the processing unit 1020 is configured to perform processing-related operations of the network device in the foregoing method embodiments.

[0208] For example, the transceiver unit 1010 is configured to receive, from a terminal device, a first SRS sequence, where the first SRS sequence is associated with a first cell, and the first cell is a serving cell of the terminal device.

[0209] It should be understood that the apparatus 1000 herein is embodied in the form of functional units. The term "unit" herein can refer to an application specific integrated circuit (ASIC), an electronic circuit, a processor (for example, a shared processor, a dedicated processor, or a group processor and the like) and a memory for executing one or more software or firmware programs, a combination of logic circuitry and / or other suitable components that support the described functions. In an optional example, those skilled in the art can understand that the apparatus 1000 can be embodied as the sending end in the above-mentioned embodiments, and can be used to execute the various processes and / or steps corresponding to the sending end in the above-mentioned method embodiments, or the apparatus 1000 can be embodied as the receiving end in the above-mentioned embodiments, and can be used to execute the various processes and / or steps corresponding to the receiving end in the above-mentioned method embodiments. To avoid repetition, details are not described here.

[0210] The apparatus 1000 of each of the above-mentioned schemes has a function of implementing the corresponding steps performed by the sending end in the above-mentioned methods, or the apparatus 1000 of each of the above-mentioned schemes has a function of implementing the corresponding steps performed by the receiving end in the above-mentioned methods. The function can be implemented by hardware or corresponding software executed by hardware. The hardware or software includes one or more modules corresponding to the above-mentioned functions; for example, the transceiver unit can be replaced by a transceiver (for example, the sending unit in the transceiver unit can be replaced by a transmitter, and the receiving unit in the transceiver unit can be replaced by a receiver), and other units, such as the processing unit, can be replaced by a processor, which respectively performs the transceiving operation and the related processing operation in each method embodiment.

[0211] In addition, the above-mentioned transceiver unit can also be a transceiver circuit (for example, which can include a receiving circuit and a sending circuit), and the processing unit can be a processing circuit. In the embodiments of the present application, the above-mentioned communication device can be the receiving end or the sending end in the above-mentioned embodiments, or can be a chip or a chip system, for example, a system on chip (SoC). Wherein, the transceiver unit can be an input / output circuit, a communication interface. The processing unit is a processor or a microprocessor integrated on the chip or an integrated circuit. Herein, no limitation is made.

[0212] FIG. 8 is a schematic block diagram of a communication device 2000 provided by the embodiments of the present application. As shown in FIG. 8, the device 2000 includes a processor 2010 and a transceiver 2020. Wherein, the processor 2010 and the transceiver 2020 communicate with each other through an internal connection path, and the processor 2010 is used to execute instructions to control the transceiver 2020 to send and / or receive signals.

[0213] Optionally, the apparatus 2000 further includes a memory 2030, which is in communication with the processor 2010 and the transceiver 2020 via the interconnection medium. The memory 2030 is used to store instructions that can be executed by the processor 2010.

[0214] Optionally, the apparatus 2000 is a terminal device, and can also be a communication apparatus, such as a chip, a chip system or a circuit, applied to or matched with the terminal device, and capable of realizing the method executed by the terminal device. For details, refer to the related description of the chip system shown in FIG. 10.

[0215] Optionally, the apparatus 2000 is a network device, and can also be a communication apparatus, such as a chip, a chip system or a circuit, applied to or matched with the network device, and capable of realizing the method executed by the network device. For details, refer to the related description of the chip system shown in FIG. 10.

[0216] In a possible implementation, the apparatus 2000 is configured to implement the processes and steps corresponding to the terminal device in the method embodiments.

[0217] In another possible implementation, the apparatus 2000 is configured to implement the processes and steps corresponding to the network device in the method embodiments.

[0218] Optionally, the memory 2030 can include a read-only memory and a random access memory, and provide instructions and data to the processor. A part of the memory can also include a non-volatile random access memory. For example, the memory can also store device type information. The processor 2010 can be configured to execute the instructions stored in the memory, and when the processor 2010 executes the instructions stored in the memory, the processor 2010 is configured to execute the steps and / or processes of the method embodiments corresponding to the sending end or the receiving end.

[0219] In the implementation process, the steps of the above method can be completed by the integrated logic circuit of hardware in the processor or the instructions in the form of software. The steps of the method disclosed in the embodiments of the present application can be directly embodied as the execution completed by the hardware processor, or executed by the combination of hardware and software modules in the processor. The software modules can be located in the storage medium in the art which is mature, such as random access memory, flash memory, read-only memory, programmable read-only memory, electrically erasable programmable memory, register, etc. The storage medium is located in the memory, and the processor reads the information in the memory and combines the hardware to complete the steps of the above method. To avoid repetition, it will not be described in detail here.

[0220] It should be noted that the processor in the embodiments of the present application can be an integrated circuit chip with a processing capability of signals. In the implementation process, each step of the method embodiments can be completed by the integrated logic circuit of hardware in the processor or the instructions in the form of software. The processor mentioned above can be a general processor, a digital signal processor, an application specific integrated circuit, a field programmable gate array or other programmable logic device, a discrete gate or transistor logic device, a discrete hardware component, or a part of circuit in the foregoing CPU, other general processor, DSP, ASIC, FGPA or other programmable logic device, or other chip for processing functions. The processor in the embodiments of the present application can implement or execute the methods, steps and logic block diagrams disclosed in the embodiments of the present application. The general processor can be a microprocessor or the processor can also be any conventional processor or the like. The steps of the method disclosed in combination with the embodiments of the present application can be directly embodied as a hardware code processor for execution, or be executed by a combination of hardware and software modules in the code processor. The software module can be located in a random access memory, a flash memory, a read only memory, a programmable read only memory or an electrically erasable programmable memory, a register or other mature storage medium in the art. The storage medium is located in the memory, and the processor reads the information in the memory, and combines the hardware to complete the steps of the method.

[0221] It is to be understood that the memory in the embodiments of the present application can be a volatile memory or a non-volatile memory, or can include both volatile and non-volatile memories. Among them, the non-volatile memory can be a read-only memory (ROM), a programmable read-only memory (PROM), an erasable programmable read-only memory (EPROM), an electrically EPROM (EEPROM) or a flash memory. The volatile memory can be a random access memory (RAM) used as an external cache. By way of example, but not limitation, many forms of RAM are available, such as static random access memory (SRAM), dynamic random access memory (DRAM), synchronous dynamic random access memory (SDRAM), double data rate SDRAM (DDR SDRAM), enhanced SDRAM (ESDRAM), synchlink DRAM (SLDRAM) and direct rambus RAM (DR RAM). It should be noted that the memory of the system and method described herein is intended to include, but not limited to, these and any other suitable types of memory.

[0222] Figure 9 is a block diagram of an example of a baseband (Baseband) hardware implementation provided by the embodiments of the present application. As shown in Figure 9, the Baseband can be implemented with a processing system including one or more processors (such as processor #1 to processor #N). The processor includes a microprocessor (such as X86, ARM), a microcontroller, a digital signal processor (DSP), a field programmable gate array (FPGA), a GPU, a programmable logic device (PLD), a state machine, a gate logic, a discrete hardware circuit, and other suitable hardware configured to various functions. That is, the processor used in the Baseband can be used to implement the processes and any one or more of the processes described below.

[0223] By way of example, the Baseband is a terminal device, and can also be a communication device, such as a chip, a chip system or a circuit, applied to or matched with the terminal device, capable of implementing the method executed by the terminal device, for example, the chip system described in Figure 10.

[0224] Exemplarily, the Baseband is a network device, and can also be a communication device, such as a chip, a chip system or a circuit, applied to or matched with the network device, and capable of implementing the method executed by the network device. For details, refer to the related description of the chip system shown in FIG. 10.

[0225] In a possible implementation, the Baseband is configured to implement each flow and step corresponding to the terminal device in the method embodiments.

[0226] In another possible implementation, the Baseband is configured to implement each flow and step corresponding to the network device in the method embodiments.

[0227] The processing system can be implemented with a bus architecture, generally represented by the bus. The bus can include any number of interconnecting buses and bridges, depending on the specific application of the processing system and the overall design constraints. The bus communicatively couples various circuits including one or more processors (generally represented by the processor), memory, and computer-readable media (generally represented by the computer-readable media). The bus can also link various other circuits such as timing sources, peripherals, voltage regulators, and power management circuits, which are well known in the art, and therefore, will not be further described. A bus interface provides an interface between the bus and a transceiver.

[0228] The transceiver provides a communication interface or means for communicating with various other apparatus over a wireless transmission medium. The transceiver can be coupled to an antenna array, and the transceiver and antenna array can together operate to communicate with a corresponding network type. At least one interface (e.g., network interface and / or user interface) provides a communication interface or means for communicating over the internal bus or via an external transmission medium.

[0229] The processor is responsible for managing the bus and general processing, including the execution of software stored on the computer-readable medium. The software, when executed by the processor, causes the processing system to perform the various functions described below for any particular apparatus. The functions of the processor and the memory and the computer-readable medium can be implemented in a single semiconductor platform, or in multiple platforms.

[0230] In the embodiments of the present application, the method described above can be executed by the terminal device or the network device, or by the chip, chip system or circuit of the terminal device or the network device, which can be installed in the terminal device or the network device. The chip system of the terminal device or the network device is described below in conjunction with FIG. 10.

[0231] FIG. 10 is a schematic block diagram of a chip system 3000 according to an embodiment of the present application. As shown in FIG. 10, the chip system 3000 (or also referred to as a processing system) includes a logic circuit 3010 and an input / output interface 3020.

[0232] The logic circuit 3010 can be a processing circuit in the chip system 3000. The logic circuit 3010 can be coupled to a storage unit, and invoke instructions in the storage unit, so that the chip system 3000 can implement the methods and functions of the embodiments of the present application. The input / output interface 3020 can be an input / output circuit in the chip system 3000, and output information processed by the chip system 3000, or input data or signaling information to be processed by the chip system 3000.

[0233] As an option, the chip system 3000 is configured to implement operations performed by a terminal device or a network device in the above method embodiments.

[0234] For example, the logic circuit 3010 is configured to implement processing-related operations performed by a terminal device in the above method embodiments, such as the processing-related operations performed by the terminal device in the above embodiments; and the input / output interface 3020 is configured to implement sending and / or receiving-related operations performed by the terminal device in the above method embodiments, such as the sending and / or receiving-related operations performed by the terminal device in the above embodiments.

[0235] For another example, the logic circuit 3010 is configured to implement processing-related operations performed by a network device in the above method embodiments, such as the processing-related operations performed by the network device in the above embodiments; and the input / output interface 3020 is configured to implement sending and / or receiving-related operations performed by the network device in the above method embodiments, such as the sending and / or receiving-related operations performed by the network device in the above embodiments.

[0236] The embodiments of the present application also provide a computer readable storage medium, which stores computer instructions for implementing the method performed by a terminal device or a network device in the above method embodiments.

[0237] The embodiments of the present application also provide a computer program product, which contains instructions executed by a computer to implement the method performed by a terminal device or a network device in the above method embodiments.

[0238] The embodiments of the present application also provide a communication system, which includes the terminal device or the network device in the above embodiments.

[0239] The explanations and beneficial effects of the related contents in any one of the above provided devices can refer to the corresponding method embodiments provided above, and will not be repeated here.

[0240] In the present application, the methods and / or terms between the method embodiments can be mutually referred to without logical contradiction, for example, the functions and / or terms between the device embodiments can be mutually referred to, for example, the functions and / or terms between the device examples and the method examples can be mutually referred to.

[0241] In various embodiments of the present application, the size of the serial number of each process described above does not mean the sequence of execution, and the execution sequence of each process should be determined according to its function and inherent logic, and should not constitute any limitation on the implementation process of the embodiments of the present application.

[0242] Those of ordinary skill in the art can realize that the units and algorithm steps of each example described in combination with the embodiments disclosed herein can be realized in electronic hardware, or a combination of computer software and electronic hardware. Whether the functions are performed in hardware or software depends on the specific application and design constraints of the technical solution. Those skilled in the art can use different methods to implement the described functions for each specific application, but such implementation should not be considered beyond the scope of the present application.

[0243] Those skilled in the art can clearly understand that, for the convenience and brevity of the description, the specific working processes of the above-described system, device and unit can refer to the corresponding processes in the foregoing method embodiments, which will not be repeated here.

[0244] In several embodiments provided by the present application, it should be understood that the disclosed system, device and method can be implemented by other manners. For example, the device embodiments described above are only schematic, for example, the division of the units is only a logical function division, and actual implementation can have another division manner, for example, a plurality of units or components can be combined or integrated into another system, or some features can be ignored or not executed. In addition, the coupling or direct coupling or communication connection between the displayed or discussed each other can be through some interface, device or unit indirect coupling or communication connection, which can be electrical, mechanical or other forms.

[0245] The units described as separate components can or can not be physically separated, and the components shown as units can or can not be physical units, i.e. they can be located in one place, or can be distributed on a plurality of network units. Some or all of the units can be selected according to actual needs to achieve the purpose of the embodiments of the present application.

[0246] In addition, each function unit in each embodiment of the present application can be integrated in one processing unit, or each unit can be physically present separately, or two or more units can be integrated in one unit.

[0247] The functions, if implemented in the form of software functional units and sold or used as independent products, can be stored in a computer readable storage medium. Based on such understanding, the technical solutions of the present application or the parts of the technical solutions that essentially contribute to the prior art or the parts of the technical solutions can be embodied in the form of a software product. The computer software product is stored in a storage medium and includes a plurality of instructions for causing a computer device (which can be a personal computer, a server, or a network device, etc.) to execute all or part of the steps of the methods described in each embodiment of the present application. The aforementioned storage medium includes: a U disk, a mobile hard disk, a ROM, a RAM, a magnetic disk or an optical disk, and various media that can store program codes.

[0248] The above is only a specific implementation of the present application, but the protection scope of the present application is not limited thereto. Any person skilled in the art can easily think of changes or replacements within the technical scope disclosed in the present application, which should be covered within the protection scope of the present application. Therefore, the protection scope of the present application should be subject to the protection scope of the claims.

Claims

1. A communication method, characterized in that, Applied to terminal devices, including: A first channel sounding reference signal (SRS) sequence is generated, the first SRS sequence being associated with a first cell, the first cell being the serving cell of the terminal device; Send the first SRS sequence to the network device.

2. The method according to claim 1, characterized in that, Sending the first SRS sequence to the network device includes: The first SRS sequence is sent to the network device via a first resource, which is associated with the first cell.

3. The method according to claim 2, characterized in that, The first resource corresponds to the initial value of the first comb tooth offset. The The following conditions must be met: X is an integer greater than or equal to 2. This is the identity ID of the first community.

4. The method according to claim 3, characterized in that, The value of X is determined based on at least one of the following parameters: The number of antenna ports used by the terminal device to transmit SRS, and the comb tooth value K used by the terminal device to transmit SRS. TC .

5. The method according to any one of claims 1 to 4, characterized in that, The generation of the first SRS sequence includes: The first SRS sequence is generated based on the first parameter, which is associated with the first cell.

6. The method according to claim 5, characterized in that, The first parameter includes the initial value of the cyclic shift. The satisfy Y is an integer greater than or equal to 1. This is the ID of the first cell.

7. The method according to claim 6, characterized in that, The value of Y is determined based on at least one of the following parameters: The number of antenna ports used by the terminal device to transmit SRS, and the maximum cyclic shift number used by the terminal device to generate SRS. The terminal device uses the comb value K to send SRS. TC .

8. A communication method, characterized in that, Applied to network devices, including: A first SRS sequence is received from a terminal device, the first SRS sequence being associated with a first cell, the first cell being the serving cell of the terminal device.

9. The method according to claim 8, characterized in that, Receiving the first SRS sequence from the terminal device includes: A first SRS sequence is received from the terminal device via a first resource, which is associated with the first cell.

10. The method according to claim 9, characterized in that, The first resource corresponds to the initial value of the first comb tooth offset. The The following conditions must be met: X is an integer greater than or equal to 2. This is the ID of the first cell.

11. The method according to claim 10, characterized in that, The value of X is determined based on at least one of the following parameters: The number of antenna ports used by the terminal device to transmit SRS, and the comb tooth value K used by the terminal device to transmit SRS. TC .

12. The method according to any one of claims 8-11, characterized in that, The first SRS sequence is generated based on a first parameter, which is associated with the first cell.

13. The method according to claim 12, characterized in that, The first parameter includes the initial value of the cyclic shift. The satisfy Y is an integer greater than or equal to 1. This is the ID of the first cell.

14. The method according to claim 13, characterized in that, The value of Y is determined based on at least one of the following parameters: The number of antenna ports used by the terminal device to transmit SRS, and the maximum cyclic shift number used by the terminal device to generate SRS. The terminal device uses the comb value K to send SRS. TC .

15. A communication device, characterized in that, The apparatus includes a unit or module for performing the method of any one of claims 1 to 7, or the apparatus includes a unit or module for performing the method of any one of claims 8 to 14.

16. A communication system, characterized in that, include: The terminal device and the network device are configured to perform the method as described in any one of claims 1 to 7, and the receiving device is configured to perform the method as described in any one of claims 8 to 14.

17. A computer-readable storage medium, characterized in that, The computer-readable storage medium stores computer instructions that, when the computer program is run on a computer, cause the computer to perform the method as described in any one of claims 1 to 7, or cause the computer to perform the method as described in any one of claims 8 to 14.

18. A computer program product, characterized in that, The computer program product includes: computer program code that, when run on a communication device, causes the device to perform the method as described in any one of claims 1 to 7, or causes the device to perform the method as described in any one of claims 8 to 14.

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