Communication method and communication device

Abstract

Provided are a communication method and a communication device, the terminal device determining, on the basis of the TA of a first network device in a low-frequency band, an emission time at which an uplink signal is sent to a second network device for the first time in a case where there is no downlink between the terminal device and the second network device in a millimeter-wave band. And the second network equipment provides the measurement result of the uplink signal to the first network equipment. And the first network device calculates a timing adjustment amount based on the measurement result and issues the timing adjustment amount to the UE, thereby realizing closed-loop adjustment of the emission time of the uplink signal of the UE. As the terminal equipment does not need to receive the downlink synchronization signal of the second network equipment and the command for indicating the uplink timing advance, the second network equipment can correctly receive the uplink signal of the terminal equipment, and the terminal equipment can not support or close the downlink function of the millimeter wave frequency band on hardware; therefore, the complexity and the cost of the terminal equipment can be reduced.

Description

Technical Field

[0001] This application relates to the field of wireless communication technology, and more specifically, to a communication method and a communication device. Background Technology

[0002] Under ideal line-of-sight (LOS) single-path conditions, a larger bandwidth of the positioning sounding reference signal (PosSRS) results in a smaller time-of-arrival (TOA) measurement error. In practical multipath conditions, increasing the bandwidth of the PosSRS improves multipath resolution and thus TOA measurement accuracy; in other words, a larger bandwidth of the PosSRS leads to higher positioning accuracy. Fifth-generation (5G) systems possess abundant millimeter-wave spectrum resources, with carrier bandwidths reaching 400MHz or 800MHz. Shared infrastructure among different operators can achieve bandwidths exceeding 800MHz. Therefore, high-precision positioning can be achieved based on millimeter waves.

[0003] Positioning schemes based on location detection reference signals involve processes such as timing advance adjustment and open-loop power control. To support timing advance adjustment, the user equipment (UE) must support downlink synchronization signals and synchronize with the base station in the millimeter-wave band. The UE needs to provide an uplink reference signal for the base station to measure timing advance (TA). Furthermore, the base station issues TA adjustment commands, requiring the UE to support data transmission functionality. To support open-loop power control, the UE needs to be able to measure the reference signal used to calculate downlink path loss.

[0004] Millimeter wave bands are high-frequency bands, and UEs that currently support millimeter wave bands generally also support low-frequency bands. The aforementioned positioning scheme based on positioning detection reference signals requires the UE to have complete or near-complete 5G functionality in the millimeter wave band, leading to increased complexity and cost of the UE. Summary of the Invention

[0005] This application provides a communication method and a communication device that can reduce the complexity and cost of UEs supporting millimeter-wave frequency bands.

[0006] In a first aspect, a communication method is provided, which can be executed by a communication device or a module applied to the communication device (e.g., a processor, chip, circuit, etc., or a logic module, hardware, and / or software capable of implementing all or part of the functions of the communication device). As an example, the communication device is a terminal device. The method includes: transmitting one or more uplink signals to a second network device based on a first transmission time, wherein there is no downlink between the terminal device and the second network device; receiving first information from the first network device, the first information indicating a timing adjustment amount, the timing adjustment amount being determined based on at least one of the one or more uplink signals; and adjusting the first transmission time based on the timing adjustment amount.

[0007] In this technical solution, a terminal device sends one or more uplink signals. A second network device, which has no corresponding downlink between itself and the terminal device, measures these one or more signals to obtain timing adjustment (TA) information. The second network device then sends the TA information to a first network device. A complete uplink and downlink exist between the first network device and the terminal device. Based on the TA information received from the second network device, the first network device determines a timing adjustment amount and, through the downlink between the first network device and the terminal device, instructs the terminal device of this timing adjustment amount, thereby achieving closed-loop adjustment of the timing of the terminal device sending uplink signals to the second network device. This solution does not require the terminal device to support downlink functionality in the operating frequency band (e.g., millimeter-wave band) of the second network device in hardware to determine the timing of the terminal device sending uplink signals, thus reducing the complexity and cost of the terminal device.

[0008] This solution can be applied to scenarios where a second network device receives uplink signals from a terminal device, solving the problem of determining the timing of uplink signal transmission when there is no downlink between the second network device and the terminal device.

[0009] In conjunction with the first aspect, in some implementations of the first aspect, the first transmission time is the transmission time when the terminal device first sends the one or more uplink signals, and the first transmission time is determined based on the timing of the first network device.

[0010] In this implementation, in the closed-loop adjustment scheme provided in this application, when the terminal device sends an uplink signal to the second network device for the first time, the timing of the uplink signal (i.e., the transmission time) is determined based on the timing of the first network device. After the second network device measures the uplink signal sent by the terminal device for the first time to obtain the corresponding TA, it can subsequently achieve closed-loop adjustment of the timing of the uplink signal sent by the terminal device.

[0011] In conjunction with the first aspect, in some implementations of the first aspect, the first transmission time is determined based on the timing of the first network device, including: the first transmission time and the timing of the first network device are aligned, and the timing of the first network device is: based on the downlink timing of the first network device, the timing of the first network device is advanced by half of TA.

[0012] In this implementation, the timing reference (TA) for the initial uplink signal sent by the terminal device to the second network device is half of the TA of the first network device. Since there is a downlink between the first network device and the terminal device, the first network device instructs the terminal device to advance its timing reference (TA). By advancing the TA by half of the first network device's downlink timing as a reference, the network-side timing can be obtained. The terminal device then aligns its uplink signal with the network-side timing before sending it to the second network device. This implementation solves the timing problem of the terminal device's initial uplink signal transmission to the second network device.

[0013] In conjunction with the first aspect, in some implementations of the first aspect, in the frequency domain, each of the one or more uplink signals is transmitted on one of the M subcarriers; in the time domain, each uplink signal includes an equivalent cyclic prefix (CP) and valid data. The equivalent CP includes the duration of the first period of the M periods corresponding to the second network device and a data segment within a time-domain symbol. The duration of the valid data includes the duration of the remaining M-1 periods of the M periods excluding the first period, where M is a positive integer.

[0014] This implementation method is equivalent to adding a cyclic prefix to the uplink signal transmitted by the UE, which can increase the coverage of the uplink signal. Combined with the scheme for determining the first transmission time, this implementation method can further increase the coverage of the uplink signal initially transmitted by the terminal device.

[0015] In conjunction with the first aspect, in some implementations of the first aspect, receiving the first information from the first network device includes: receiving a paging message from the first network device, the paging message containing the first information; or, receiving MAC CE signaling from the first network device, the MAC CE signaling containing the first information.

[0016] In this implementation, the first network device sends timing adjustment quantities to the terminal device through different signaling based on whether the terminal device is in an RRC inactive state or an RRC connected state.

[0017] In conjunction with the first aspect, in some implementations of the first aspect, the first network device and the second network device operate in different frequency bands, or the first network device and the second network device operate in the same frequency band.

[0018] The above solutions are applicable to scenarios where the two network devices operate on the same frequency or different frequencies. When operating on the same frequency, the first network device may or may not receive uplink signals between the terminal device and the second network device; when operating on different frequencies, the solutions in this application are applicable to situations where the terminal device does not support or disables the downlink function of the frequency band (e.g., high-frequency band) corresponding to the second network device, which can reduce the complexity and cost of the terminal device.

[0019] Secondly, a communication method is provided, which can be executed by a communication device or a module applied to the communication device (e.g., a processor, chip, circuit, etc., or a logic module, hardware, and / or software capable of implementing all or part of the functions of the communication device). As an example, the communication device is a terminal device. The method includes: transmitting a first uplink signal; receiving first information, the first information indicating a timing adjustment amount, the timing adjustment amount being determined based on measurement results obtained by the first network device and the second network device respectively measuring the first uplink signal; and transmitting a second uplink signal based on the timing adjustment amount.

[0020] In this technical solution, the first network device and the second network device respectively measure the uplink signal of the terminal device and obtain their respective measurement results. Based on the measurement results obtained by the first network device and the second network device, the first network device determines the timing adjustment amount and instructs the terminal device through first information, thereby adjusting the timing of the uplink signal transmission by the terminal device. When there is no downlink between the terminal device and the second network device, the transmission timing of the uplink signal on the uplink can also be determined.

[0021] This solution is applicable when the first network device and the second network device operate on the same frequency, such as both operating in low-frequency or high-frequency bands.

[0022] In this scheme, the aforementioned measurement results may include timing advance of TA and / or signal reception strength. Alternatively, the timing adjustment amount can be determined based on the TA and / or signal reception strength obtained by the first network device and the second network device respectively measuring the first uplink signal.

[0023] In conjunction with the second aspect, in some implementations of the second aspect, the measurement result includes the timing adjustment (TA); the timing adjustment amount is determined based on the measurement results obtained by the first network device and the second network device respectively from measuring the uplink signal, including: if the difference between the first TA and the second TA is greater than a first threshold, the timing adjustment amount is the second TA; if the difference between the second TA and the first TA is greater than a first threshold, the timing adjustment amount is the first TA; wherein, the first TA is the TA determined by the first network device from measuring the first uplink signal, and the second TA is the TA determined by the second network device from measuring the first uplink signal.

[0024] In this implementation, the timing adjustment amount is determined based on the relationship between the timing transitions (TAs) determined by the first network device and the second network device respectively by measuring the first uplink signal. Specifically, the TA for the uplink signal sent by the terminal device is determined to be the smaller TA, and the network device corresponding to the smaller TA can be allowed to receive the uplink signal from the terminal device, thereby improving the reception quality of the uplink signal.

[0025] In conjunction with the second aspect, in some implementations of the second aspect, the measurement result includes the timing adjustment (TA); the timing adjustment amount is determined based on the measurement results obtained by the first network device and the second network device respectively from measuring the uplink signal, including: the timing adjustment amount is a value between the first TA and the second TA, wherein the first TA is the TA determined by the first network device from measuring the first uplink signal, the second TA is the TA determined by the second network device from measuring the first uplink signal, and the first TA and the second TA are cases other than satisfying the following constraints: the difference between the first TA and the second TA is greater than a first threshold, or the difference between the second TA and the first TA is greater than a first threshold.

[0026] In this implementation, both the first network device and the second network device receive the uplink signal from the terminal device.

[0027] In conjunction with the second aspect, in some implementations of the second aspect, the measurement result includes the signal received strength; and the timing adjustment amount is determined based on the measurement results obtained by the first network device and the second network device respectively from measuring the uplink signal, including: if the difference between the first signal received strength and the second signal received strength is greater than a second threshold, the timing adjustment amount is a first TA; or, if the difference between the second signal received strength and the first signal received strength is greater than a second threshold, the timing adjustment amount is a second TA; wherein the first signal received strength and the first TA are obtained by the first network device measuring the first uplink signal, and the second signal received strength and the second TA are obtained by the second network device measuring the first uplink signal.

[0028] In this implementation, the timing adjustment amount is determined based on the signal reception strength obtained by the first network device and the second network device respectively by measuring the first uplink signal. Specifically, the timing adjustment amount can be the timing adjustment (TA) determined by the network device with the larger measured signal reception strength. Simultaneously, the network device with the larger measured signal reception strength serves as the uplink signal receiving device for the terminal device, thereby improving the uplink signal reception quality.

[0029] In conjunction with the second aspect, in some implementations of the second aspect, the measurement result includes the timing adjustment (TA) and the received signal strength; and the timing adjustment amount is determined based on the measurement results obtained by the first network device and the second network device respectively from measuring the uplink signal, including: if the difference between the second TA and the first TA is greater than a first threshold, and the difference between the first received signal strength and the second received signal strength is greater than a second threshold, the timing adjustment amount is the first TA; or, if the difference between the first TA and the second TA is greater than a first threshold, and the difference between the second received signal strength and the first received signal strength is greater than a second threshold, the timing adjustment amount is the second TA; wherein the first received signal strength and the first TA are obtained by the first network device measuring the first uplink signal, and the second received signal strength and the second TA are obtained by the second network device measuring the first uplink signal.

[0030] In this implementation, the timing adjustment amount is determined by the first network device and the second network device respectively by measuring the TA obtained from the first uplink signal and the signal reception strength.

[0031] In conjunction with the second aspect, in some implementations of the second aspect, the first network device and the second network device operate in the same frequency band.

[0032] Thirdly, a communication method is provided, which can be executed by a communication device or a module applied to the communication device (e.g., a processor, chip, circuit, etc., or a logic module, hardware, and / or software capable of implementing all or part of the functions of the communication device). As an example, the communication device is a network device. The method includes: obtaining timing advance (TA) information from a second network device, the TA information being obtained by the second network device measuring at least one uplink signal from one or more uplink signals from a terminal device, wherein there is no downlink between the second network device and the terminal device; determining a timing adjustment amount based on the TA information; and sending first information indicating the timing adjustment amount, the timing adjustment amount being used by the terminal device to adjust a first transmission time of an uplink signal sent to the second network device.

[0033] In conjunction with the third aspect, in some implementations of the third aspect, the first transmission time is the transmission time when the terminal device first sends the one or more uplink signals, and the first transmission time is determined based on the timing of the first network device.

[0034] In conjunction with the third aspect, in some implementations of the third aspect, the first transmission time is determined based on the timing of the first network device, including: the first transmission time and the timing of the first network device are aligned, and the timing of the first network device is: based on the downlink timing of the first network device, the timing of the first network device is advanced by half of TA.

[0035] In conjunction with the third aspect, in some implementations of the third aspect, in the frequency domain, each of the one or more uplink signals is transmitted on one of the M subcarriers; in the time domain, each uplink signal includes an equivalent cyclic prefix (CP) and valid data. The equivalent CP includes the duration of the first period of the M periods corresponding to the second network device and a data segment within a time-domain symbol. The duration of the valid data includes the duration of the remaining M-1 periods excluding the first period, where M is a positive integer.

[0036] In conjunction with the third aspect, in some implementations of the third aspect, sending the first information includes: sending a paging message containing the first information; or sending MAC CE signaling containing the first information.

[0037] In conjunction with the third aspect, in some implementations of the third aspect, the first network device and the second network device operate in different frequency bands, or the first network device and the second network device operate in the same frequency band.

[0038] Fourthly, a communication method is provided, which can be executed by a communication device or a module applied to the communication device (e.g., a processor, chip, circuit, etc., or a logic module, hardware, and / or software capable of implementing all or part of the functions of the communication device). As an example, the communication device is a network device. The method includes: measuring a first uplink signal from a terminal device to obtain a first measurement result; obtaining a second measurement result from a second network device, the second measurement result being determined by the second network device based on the measurement of the first uplink signal, wherein there is no downlink between the terminal device and the second network device; and determining a timing adjustment amount based on the first measurement result and the second measurement result, the timing adjustment amount being used by the terminal device to adjust the transmission time of a second uplink signal sent to the second network device.

[0039] In conjunction with the fourth aspect, in some implementations of the fourth aspect, the first measurement result or the second measurement result includes: timing advance TA and / or signal reception strength.

[0040] In conjunction with the fourth aspect, in some implementations of the fourth aspect, the first measurement result or the second measurement result includes the TA; determining the timing adjustment amount based on the first measurement result and the second measurement result includes: if the difference between the first TA and the second TA is greater than a first threshold, the timing adjustment amount is determined to be the second TA; or, if the difference between the second TA and the first TA is greater than a first threshold, the timing adjustment amount is determined to be the first TA; wherein, the first TA is the TA determined by the first network device measuring the first uplink signal, and the second TA is the TA determined by the second network device measuring the first uplink signal.

[0041] In conjunction with the fourth aspect, in some implementations of the fourth aspect, the measurement result includes the timing adjustment (TA); determining the timing adjustment amount based on the first measurement result and the second measurement result includes: the timing adjustment amount is a value between the first TA and the second TA, wherein the first TA and the second TA are conditions other than satisfying the following constraints: the difference between the first TA and the second TA is greater than a first threshold, or the difference between the second TA and the first TA is greater than a first threshold, wherein the first TA is the TA determined by the first network device measuring the first uplink signal, and the second TA is the TA determined by the second network device measuring the first uplink signal.

[0042] In conjunction with the fourth aspect, in some implementations of the fourth aspect, the first measurement result or the second measurement result includes the signal received strength; determining the timing adjustment amount based on the first measurement result and the second measurement result includes: if the difference between the first signal received strength and the second signal received strength is greater than a second threshold, determining the timing adjustment amount as a first TA; or, if the difference between the second signal received strength and the first signal received strength is greater than a second threshold, determining the timing adjustment amount as a second TA; wherein the first signal received strength and the first TA are obtained by the first network device measuring the first uplink signal, and the second signal received strength and the second TA are obtained by the second network device measuring the first uplink signal.

[0043] In conjunction with the fourth aspect, in some implementations of the fourth aspect, the first measurement result or the second measurement result includes: the TA and the signal received strength; determining the timing adjustment amount based on the first measurement result and the second measurement result includes: if the difference between the second TA and the first TA is greater than a first threshold, and the difference between the first signal received strength and the second signal received strength is greater than a second threshold, the timing adjustment amount is the first TA; or, if the difference between the first TA and the second TA is greater than a first threshold, and the difference between the second signal received strength and the first signal received strength is greater than a second threshold, the timing adjustment amount is the second TA; wherein the first signal received strength and the first TA are obtained by the first network device measuring the first uplink signal, and the second signal received strength and the second TA are obtained by the second network device measuring the first uplink signal.

[0044] In conjunction with the fourth aspect, in some implementations of the fourth aspect, the first network device and the second network device operate in the same frequency band.

[0045] The methods in the third and fourth aspects mentioned above are network-side implementations of the methods in the first and second aspects, respectively. The beneficial technical effects can be referred to the descriptions in the first or second aspects, and will not be repeated here.

[0046] Fifthly, a communication device is provided, the communication device having the function of implementing the method of the first aspect or the second aspect, or any possible implementation of these aspects; or having the function of implementing the method of the third aspect or the fourth aspect, or any possible implementation of these aspects. The function can be implemented by hardware, or by hardware executing corresponding software. The hardware or software includes one or more units corresponding to the above-described functions.

[0047] Sixthly, a communication device is provided, the communication device having the function of implementing the method of the first aspect or the second aspect, or any possible implementation of these aspects; or having the function of implementing the method of the third aspect or the fourth aspect, or any possible implementation of these aspects. The function can be implemented by hardware or by hardware executing corresponding software. The hardware or software includes one or more units corresponding to the above-described functions.

[0048] A seventh aspect provides a communication device including at least one processor configured to cause the communication device to perform a method of the first aspect or the second aspect, or any possible implementation thereof; or to perform a method of the third aspect or the fourth aspect, or any possible implementation thereof. Optionally, the at least one processor is coupled to at least one memory for storing a computer program or instructions, the at least one processor being configured to call and run the computer program or instructions from the at least one memory, causing the communication device to perform a method of the first aspect or the second aspect, or any possible implementation thereof; or to perform a method of the third aspect or the fourth aspect, or any possible implementation thereof. Optionally, the at least one processor may be included in the communication device or may be configured externally to the communication device. Optionally, the communication device further includes the at least one memory. Optionally, the communication device further includes at least one communication interface. As an example, the communication interface may include an input interface and / or an output interface, or may be an interface circuit.

[0049] Eighthly, a communication device is provided, comprising a communication interface and a circuit. The communication interface is configured to receive a signal to be processed and transmit the signal to the circuit. The circuit is configured to process the signal to perform a method as described in the first or second aspect, or any possible implementation thereof; or to perform a method as described in the third or fourth aspect, or any possible implementation thereof. Optionally, the communication interface is further configured to output the signal processed by the circuit. Optionally, the signal may include information and / or data. Optionally, the communication device may be a chip (e.g., a baseband chip) or a chip system.

[0050] A ninth aspect provides a computer-readable storage medium storing computer program code or instructions that, when executed on a computer, cause the method of the first or second aspect, or any possible implementation thereof, to be implemented; or the method of the third or fourth aspect, or any possible implementation thereof, to be implemented.

[0051] In a tenth aspect, a computer program product is provided, the computer program product comprising computer program code or instructions that, when executed on a computer, cause the method in the first aspect or the second aspect, or any possible implementation thereof, to be implemented; or, as in the third aspect or the fourth aspect, or any possible implementation thereof, to be implemented.

[0052] Eleventh aspect: A wireless communication system is provided, including the communication device as described in the fifth aspect and the communication device as described in the sixth aspect. Attached Figure Description

[0053] Figure 1 This is a known positioning scheme based on a positioning detection reference signal.

[0054] Figure 2 This is a schematic diagram of the system architecture applicable to embodiments of this application.

[0055] Figure 3 A schematic flowchart of the communication method 300 provided in this application.

[0056] Figure 4 This is a schematic diagram of a system architecture applicable to embodiments of this application.

[0057] Figure 5 An example provided for this application of determining the transmission time of the first uplink signal.

[0058] Figure 6 An example of comb-tooth transmission of the uplink signal provided in this application in the frequency domain.

[0059] Figure 7 This is a schematic diagram of the TA closed-loop adjustment provided in this application.

[0060] Figure 8 This application provides a schematic diagram of a TAC for locating an SRS via a MAC CE indicator.

[0061] Figure 9 This is a schematic diagram of a system architecture applicable to an embodiment of this application.

[0062] Figure 10 A schematic flowchart of the communication method 900 provided in this application.

[0063] Figure 11 A schematic structural diagram of the communication device 1000 provided in this application.

[0064] Figure 12 A schematic structural diagram of another communication device provided in this application.

[0065] Figure 13 A schematic structural diagram of the chip provided in this application. Detailed Implementation

[0066] The technical solutions in this application will now be described with reference to the accompanying drawings.

[0067] Figure 1 This is a known positioning scheme based on a positioning sounding reference signal (PosSRS). The serving cell and neighboring cells measure base station positioning values ​​such as time of arrival (TOA) and angle of arrival (AoA) based on the PosSRS. The positioning sounding reference signal will be referred to as the positioning SRS below. The protocol specifies the following regarding the physical layer process of the positioning SRS:

[0068] 1) Timing advance (TA) adjustment for location SRS. The location SRS transmitted by the UE can be received by multiple cells. Although the distance between the UE and these cells is different, the TA of the location SRS is calculated based on the serving cell.

[0069] 2) Power control for location SRS. The UE measures the downlink signal of the target cell that it needs to receive from the location SRS; this downlink signal is called the path loss reference signal. Based on the measured path loss, the UE performs open-loop control on the transmit power of the location SRS.

[0070] The above Figure 1 The scheme shown requires the positioning terminal to have full or near-full 5G functionality in the millimeter-wave band. To support advance adjustment of the positioning SRS timing:

[0071] 1) The UE needs to support SSB signals and synchronize with the base station downlink in the millimeter wave band;

[0072] 2) The UE needs to provide an uplink reference signal for the base station to measure the TA;

[0073] 3) When the base station issues a TA adjustment command, the UE needs to support data transmission function.

[0074] In addition, to support open-loop power control of the positioning SRS:

[0075] 1) The UE needs to be able to measure the reference signal used to calculate downlink path loss.

[0076] Current millimeter-wave-enabled terminals not only possess full millimeter-wave functionality but also boast high specifications, such as support for dual connectivity and carrier aggregation, and typically support both sub-6GHz and millimeter-wave frequency bands simultaneously. This ultimately leads to increased complexity and cost for millimeter-wave terminals.

[0077] In view of this, this application provides a low-cost solution for millimeter-wave band positioning. In this solution, there is no downlink between the UE and the target receiving base station equipment. How to determine and control the transmission time of the UE's uplink signal is an urgent problem to be solved.

[0078] This application provides two schemes for determining the first transmission time of the uplink signal, as well as a scheme for subsequent TA adjustment, for scenarios where there is no downlink between the UE and the base station equipment.

[0079] The technical solution of this application is described below.

[0080] The technical solutions of this application can be applied to various existing and future communication systems, including but not limited to: satellite communication systems, fifth-generation (5G) systems or new radio (NR) systems, long-term evolution (LTE) systems, LTE frequency division duplex (FDD) systems, LTE time division duplex (TDD) systems, and future communication systems. Furthermore, they can also be applied to sidelink (SL) communication, vehicle-to-everything (V2X) communication, machine-to-machine (M2M) communication, machine-type communication (MTC), and Internet of Things (IoT) communication systems, or other communication systems, etc., which are not limited herein.

[0081] For example, a terminal device may also be referred to as user equipment (UE), access terminal, user unit, user station, mobile station, mobile station, mobile terminal (MT), remote station, remote terminal, mobile device, user terminal, terminal, wireless communication device, user agent, or user apparatus. In the embodiments of this application, the terminal device may be a device that provides voice and / or data connectivity to a user, and can be used to connect people, objects, and machines, such as a handheld device with wireless connectivity, in-vehicle equipment, etc. The terminal devices in the embodiments of this application can be mobile phones, tablets, laptops, PDAs, mobile internet devices (MIDs), wearable devices, virtual reality (VR) devices, augmented reality (AR) devices, wireless terminals in industrial control, self-driving, remote medical surgery, smart grids, transportation safety, smart cities, smart homes, etc. Optionally, the UE can act as a base station. For example, the UE can act as a scheduling entity, providing sidelink signals between UEs in V2X or SL, etc. The terminal devices in the embodiments of this application can support high-frequency bands (or FR2 bands) corresponding to millimeter-wave frequency bands, and can also support low-frequency bands (or FR1 bands).

[0082] In this embodiment, the device used to implement the functions of the terminal device can be the terminal device itself, or any device capable of supporting the terminal device in implementing the corresponding functions, such as a chip, processor, circuit, hardware, and / or software combination. This device is located on the terminal side and can be configured within or used in conjunction with the terminal device. In this embodiment, the terminal device is used as an example to illustrate the implementation of the corresponding functions of the terminal device.

[0083] The network device in this application embodiment may include a device for communicating with a terminal device. This network device may include an access network device or a radio access network device; for example, the network device may be a base station. In this application embodiment, the access network device may refer to a radio access network (RAN) node (or device) that connects the terminal device to the wireless network. A base station can broadly encompass, or be replaced by, various names such as: NodeB, evolved NodeB (eNB), next-generation NodeB (gNB), relay station, access point, transmitting and receiving point (TRP), transmitting point (TP), master station, auxiliary 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, etc. A base station can be a macro base station, micro base station, relay node, donor node, or a combination thereof. A base station can also refer to a communication module, modem, or chip installed within the aforementioned equipment or apparatus. A base station can also be a mobile switching center, a device performing base station functions in D2D, V2X, and M2M communications, a network device (e.g., a base station) in a future communication network, or a device performing network device functions. A base station can support networks using the same or different access technologies. Optionally, a RAN node can also be a server, wearable device, vehicle, or in-vehicle equipment. For example, the access network equipment in vehicle-to-everything (V2X) technology can be a roadside unit (RSU). The embodiments of this application do not limit the specific technology or device form used in the network equipment.

[0084] Base stations can be fixed or mobile. For example, a helicopter or drone can be configured to act as a mobile base station, and one or more cells can move depending on the location of the mobile base station. In other examples, a helicopter or drone can be configured as a device to communicate with another base station.

[0085] In some deployments, the network device in this application embodiment may be a device including a CU, or a DU, or a device including both CU and 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 may include gNB-CU-CP, gNB-CU-UP, and gNB-DU.

[0086] In some deployments, multiple RAN nodes collaborate to assist terminals in achieving wireless access, with different RAN nodes each implementing some of the base station's functions. For example, RAN nodes can be CUs, DUs, CU-CPs, CU-UPs, or RUs. CUs and DUs can be configured separately or included in the same network element, such as a BBU. RUs can be included in radio frequency equipment or radio frequency units, such as RRUs, AAUs, or RRHs.

[0087] In different systems, CU (or CU-CP and CU-UP), DU, or RU may have different names, but those skilled in the art will understand their meaning. For example, in an open radio access network (ORAN / O-RAN) system, CU can also be called an open CU (open CU, O-CU), and DU can also be called an open DU (open DU, O-DU). CU-CP can also be called O-CU-CP, CU-UP can also be called O-CU-UP, and RU can also be called O-RU. Any of the units among CU (or CU-CP, CU-UP), DU, and RU in this application can be implemented through software modules, hardware modules, or a combination of software modules and hardware modules.

[0088] In this embodiment, the device used to implement the functions of the network device can be the network device itself; it can also be a device capable of supporting the network device in implementing the corresponding functions, such as a chip, processor, circuit, hardware, and / or software combination. This device is located on the network side and can be configured within or used in conjunction with the network device. In this embodiment, only the network device is used as an example to illustrate the implementation of the corresponding functions of the network device.

[0089] Figure 2 This is a schematic diagram of a system architecture applicable to embodiments of this application. For example... Figure 2The system architecture contains two types of base station equipment, denoted as Base Station Equipment 1 and Base Station Equipment 2. Base Station Equipment 1 has a complete downlink and uplink with the UE, while Base Station Equipment 2 only has an uplink with the UE, lacking a downlink. Time synchronization between Base Station Equipment 1 and Base Station Equipment 2 is achieved by deploying them within the same BBU frame or through other technical means.

[0090] Base station equipment 1 and base station equipment 2 may operate in the same frequency band or in different frequency bands. Base station equipment 2 may not support downlink functionality in its hardware or may support it but have disabled downlink functionality.

[0091] When base station equipment 1 and base station equipment 2 operate on different frequencies, the UE may, in its hardware, not support or disable the downlink function of the frequency band of base station equipment 2. Downlink signaling from base station equipment 2 is transmitted to the UE through base station equipment 1. If base station equipment 1 and base station equipment 2 operate on the same frequency, there are two possible implementation methods: 1 does not need to consider whether base station equipment 1 receives the uplink channel or uplink signal between the UE and base station equipment 2; or 2 base station equipment 1 receives the uplink channel or uplink signal between the UE and base station equipment 2.

[0092] Figure 3 This is a schematic flowchart of the communication method 300 provided in this application. Method 300 can be implemented by a terminal device or a means applied to the terminal device (e.g., a chip, processor, or circuit), and a network device or a means applied to the network device (e.g., a chip, processor, or circuit). Optionally, in various embodiments of this application, the network device can be one or more (e.g., two or more), depending on the specific example. The following embodiments use a terminal device and a network device as examples for illustration.

[0093] Figure 4 This is a schematic diagram of a system architecture applicable to embodiments of this application. Figure 4 The system architecture shown is applicable to method 300. In this system architecture, base station device 1 and base station device 2 operate in different frequency bands. For example, base station device 1 operates in frequency band 1, and base station device 2 operates in frequency band 2. As an example, base station device 1 operates in a low-frequency band, such as the sub-6GHz band, and base station device 2 operates in a high-frequency band, such as the millimeter-wave band. Base station device 2 has no downlink functionality or has it disabled. The UE does not support downlink functionality in the frequency band of base station device 2 in its hardware. The uplink signal transmitted by the UE is exemplified by positioning SRS. The UE accesses the wireless network from a low-frequency band, and the data transmission function and positioning control plane function are also carried in this low-frequency band.

[0094] 310. The terminal device sends one or more uplink signals to the second network device based on the first transmission time.

[0095] There is no downlink between the terminal device and the second network device.

[0096] In the embodiments of this application, the first transmission time refers to the time when the terminal device sends an uplink signal to the second network device. It can be the time when the uplink signal is first sent, or any time when the uplink signal is sent after the first transmission.

[0097] If the first transmission time is the time when the terminal device first sends an uplink signal, the first transmission time can be determined based on the timing of the first network device, as in Scheme 1 below.

[0098] Option 1

[0099] The first transmission time is aligned with the timing of the first network device. The timing of the first network device is: based on the downlink timing of the first network device, the timing of the first network device is advanced by half of the TA.

[0100] It should be understood that, as in Scheme 2 above, the first network device and the second network device are time-synchronized. Therefore, the first transmission time is aligned with the timing of the first network device, that is, the first transmission time is aligned with the timing of the network side, or in other words, the first transmission time is aligned with the timing of the base station.

[0101] Figure 5 An example provided for this application of determining the transmission time of the first uplink signal. For example... Figure 5 The UE obtains the base station timing (as mentioned above, also known as the network-side timing) by advancing half of the downlink timing of base station 1 by the downlink timing of base station 1. The UE aligns its location SRS with the base station timing, meaning the TA of base station 2 is half of the TA of base station 1, ensuring the location SRS arrives at base station 2 after the base station timing. At this point, the maximum coverage distance supported by base station 2 is the duration T of the cyclic prefix of base station 2. CP The product of the speed of light. In this example, if the subcarrier spacing of base station device 2 is 120 kHz, T CP The voltmeter is approximately 590 ns, so the maximum coverage distance is approximately 177 meters. Figure 5Low- and mid-frequency corresponds to base station equipment 1, and high-frequency corresponds to base station equipment 2. It can be seen that base station timing can be determined based on the downlink timing of base station equipment 1, and then the UE aligns with the base station timing to send uplink signals to base station equipment 2. Base station timing can be understood as the start time of the base station receiving each uplink frame or sending each downlink frame. It should be understood that in this application, the TA of base station equipment 1 refers to the TA used by the UE to send uplink signals to base station equipment 1. Similarly, the TA of base station equipment 2 refers to the TA used by the UE to send uplink signals to base station equipment 2. Since the TA is different when the UE sends uplink signals to the same base station equipment when it is in different locations, the TA of base station equipment 1 and the TA of base station equipment 2 in this embodiment are both for one uplink transmission by the UE. Furthermore, the TA of base station equipment 1 and the TA of base station equipment 2 can be the TA used by the UE to send uplink signals to base station equipment 1 and base station equipment 2 respectively when it is in the same location.

[0102] Considering that factors such as measurement errors may cause the TA (Target Aspect Ratio) of base station equipment 1 to be too large, in order to ensure that the positioning SRS (Service Reference Receiver) reaches base station equipment 2 after the base station timing, the TA of the positioning SRS is reduced by half the TA adjustment granularity of base station equipment 1, which is based on half of the TA of base station equipment 1. Assuming that half the TA adjustment granularity of base station equipment 1 is denoted as e, the maximum coverage distance of base station equipment 2 is then (T...). CP -e) is the product of the speed of light. Where T CP This indicates the duration of the cyclic prefix (CP). In this example, if the subcarrier spacing of base station device 1 is 30kHz and e is approximately 130ns, then the maximum coverage distance of base station device 2 is approximately 138 meters.

[0103] Option 2

[0104] Scheme 1 described above, from a time-domain perspective, describes how the UE determines the transmission time when it first sends an uplink signal to the second network device (i.e., base station device 2). Scheme 2, based on Scheme 1, addresses the transmission method of this uplink signal in the frequency domain. In Scheme 2, by utilizing the time-domain repetition property of the positioning SRS, the CP of the uplink signal sent by the UE can be equivalently lengthened. The lengthened CP is referred to as the equivalent CP in this embodiment. Scheme 2 can increase the maximum coverage distance of the second network device, thereby increasing the coverage area of ​​the first uplink signal transmission.

[0105] Specifically, in Scheme 2, in the frequency domain, the UE transmits an uplink signal on one subcarrier out of every M subcarriers. Thus, in the time domain, a data segment within one time-domain symbol will have M cycles. The equivalent CP of this uplink signal includes the CP corresponding to base station device 2 and the duration of the first cycle out of the M cycles corresponding to a data segment within a time-domain symbol. The valid data of this uplink signal is the duration of the remaining M-1 cycles out of the M cycles, excluding the first cycle, where M is a positive integer.

[0106] Figure 6 An example of comb-tooth transmission of the uplink signal provided in this application in the frequency domain. For example... Figure 6 In the frequency domain, if the UE transmits positioning SRS on one of every four subcarriers, in the time domain, a data segment within one symbol will exhibit four cycles. The first cycle of the data segment is added to the CP (Concurrent Component), forming an equivalent CP. The duration of the equivalent CP is denoted as T. CP_EQ At this time, the maximum coverage distance of base station device 2 is T. CP_EQ The product of the speed of light, or (T) CP_EQ -e) is the product of the speed of light, where e is half the TA adjustment granularity of base station equipment 1, as described in Scheme 1. As an example, if T CP_EQ If the pulse length is approximately 2.67 μs, then the maximum coverage distance of base station device 2 is approximately 801 meters or 762 meters.

[0107] In the examples of Scheme 1 or Scheme 2, the uplink signal sent by the terminal device is used as an example for positioning SRS. Scheme 1 or Scheme 2 described above are also applicable to other uplink signals or uplink channels that can support TA measurement by network-side devices, without limitation.

[0108] Accordingly, the second network device measures at least one uplink signal from the terminal device to obtain the TA. The second network device then indicates the measured TA to the first network device. Optionally, there can be multiple second network devices, without limitation.

[0109] 320. The first network device acquires the TA information obtained by the second network device through measurement of the at least one uplink signal.

[0110] 330. The first network device determines the timing adjustment amount based on the information of the TA obtained from the second network device.

[0111] Based on the measurement of at least one uplink signal by the second network device in step 310, it can be seen that the timing adjustment amount is determined by the first network device based on the TA obtained by the second network device's measurement. Optionally, if there are multiple second network devices, each second network device indicates its measured TA to the first network device. The first network device comprehensively determines the timing adjustment amount based on the multiple TAs obtained from all the second network devices.

[0112] 340. The first network device sends first information to the terminal device, the first information indicating a timing adjustment amount, the timing adjustment amount being determined based on at least one of the one or more uplink signals.

[0113] The terminal device receives the first information from the first network device.

[0114] 350. The terminal equipment adjusts the first launch time based on the timing adjustment amount.

[0115] After receiving the first location SRS, the second network device can measure the location SRS and obtain the TA. The first network device obtains the TA measured by the second network device and then dynamically adjusts subsequent TAs to achieve closed-loop adjustment of the TA. In this way, the second network device can correctly receive uplink signals sent by the terminal device.

[0116] The following examples, using Examples 1 and 3, illustrate method 300.

[0117] Example 1

[0118] Base station equipment 1 and base station equipment 2 operate on different frequencies. Base station equipment 2 has no downlink functionality or has it disabled, and the UE does not support downlink functionality in the frequency band of base station equipment 2 in its hardware. In Example 1, the uplink signal is represented by the positioning SRS as an example.

[0119] In this configuration, base station equipment 1 corresponds to a low-frequency band, such as the FR1 band, while base station equipment 2 corresponds to a high-frequency band, such as the FR2 band (or millimeter-wave band). The UE transmits a 400MHz wide-bandwidth positioning SRS in the high-frequency band, such as the millimeter-wave band. In the low-frequency band, such as the sub-6GHz band, the UE is an eRedcap terminal; for example, the bandwidth is 20MHz. Furthermore, the specifications of the UE in the base station equipment 1 band are not limited. In other embodiments, the UE may be a Redcap terminal, an MBB terminal, or a terminal of other specifications. The UE accesses the wireless network from the sub-6GHz band, and the data transmission function and positioning control plane function are also carried out in the sub-6GHz band.

[0120] It should be understood that eRedcap is a technology based on the concept of RedCap (reduced capability), designed to further reduce data rates and terminal costs. RedCap, or "reduced capability," is a technical standard protocol introduced for 5G application scenarios with low requirements for data rate and latency, aiming to comprehensively improve 5G network quality and coverage; it can also be understood as "lightweight 5G." The implementation of eRedcap UE (user equipment) builds upon RedCap UE by further reducing data rates (generally not exceeding 10Mbps) and terminal costs to meet the needs of specific application scenarios.

[0121] The millimeter-wave band base station equipment 2 receives positioning SRS and performs positioning-related measurements.

[0122] In this example, base station device 2 has no downlink synchronization signal; therefore, the UE cannot synchronize with base station device 2 downlink. There is no downlink link between base station device 2 and the UE, and base station device 2 cannot directly issue uplink timing advance commands (TACs).

[0123] In the scheme provided in this application, the UE transmits positioning SRS in the millimeter-wave band based on the downlink timing of base station device 1. The complete scheme includes determining the timing of the first transmission of positioning SRS and subsequent TA closed-loop adjustment.

[0124] The timing of the first location SRS transmission can be referenced in Scheme 1 above. The following is combined with... Figure 7 Explain the subsequent TA closed-loop adjustment process.

[0125] Figure 7 This is a schematic diagram of the TA closed-loop adjustment provided in this application.

[0126] 701. The UE transmits high-frequency positioning SRS based on the latest effective TA.

[0127] It should be understood that high-frequency positioning SRS can refer to the positioning SRS sent by the terminal device to the base station device 2 corresponding to the millimeter-wave frequency band. "Latest effective TA" refers to the TA determined after adjusting the first transmission time based on the timing adjustment amount, which can be the TA of any time the terminal device sends positioning SRS in the high-frequency band.

[0128] 702. Base station equipment 1 acquires the TA obtained by base station equipment 2 through high-frequency positioning SRS measurement.

[0129] As an example, after base station device 2 obtains the TA by measuring the high-frequency positioning SRS, base station device 2 sends the measured TA to base station device 1; or, base station device 1 actively requests the measurement result of the TA from base station device 2. The messages between base station device 1 and base station device 2 may be internal base station messages or Xn interface signaling between base stations.

[0130] It should be noted that if there are multiple base station devices 2, base station device 1 must combine the measurement results of all base station devices 2 to determine the final TA adjustment amount.

[0131] 703. Base station equipment 1 sends a TAC command to the UE. The TAC command indicates the TA adjustment amount determined by base station equipment 1.

[0132] Optionally, the TA adjustment amount supports both relative and absolute adjustment methods, and the UE takes effect the TA according to the TAC command.

[0133] As an example, in the RRC_INACTIVE state, base station device 1 carries TAC commands via paging messages (or paging signaling). Furthermore, there are no restrictions on the position or data type of the TAC command within the paging message.

[0134] In another example, in the RRC_CONNECTED state, base station device 1 can issue TAC commands via the media access control-control element (MAC CE). As an example, the content of this MAC CE is as follows: Figure 8 As shown.

[0135] Figure 8 This application provides a schematic diagram of a TAC (Transient Anchoring Controller) for high-frequency positioning of SRS (Self-Regulating Radio Frequency) via MAC CE (Machine-Assisted CE). Figure 8 When Flg is set to 0, it indicates cumulative adjustment, and the high 6 bits of TAC are valid; when Flg is set to 1, it indicates absolute adjustment, and TAC requires 12 bits.

[0136] Example 2

[0137] The network architecture in this example can be as described above. Figure 4 Base station equipment 1 and base station equipment 2 operate on different frequency bands. Base station equipment 2 has downlink functionality disabled in its hardware.

[0138] In one example, when there is only one uplink signal (or uplink channel) between the UE and the base station device 2, and the uplink signal can be used for TA measurement, such as the uplink signal being SRS, the scheme 1 regarding the first transmission time in Example 1, along with TA closed-loop adjustment, can be combined to determine the transmission time when the UE sends the uplink signal to the base station device 2.

[0139] In another example, when there is only one uplink signal (or uplink channel) between the UE and the base station device 2, and the uplink signal can be used for TA measurement, and the uplink signal supports frequency domain comb transmission, for example, the uplink signal is SRS, Scheme 1 or Scheme 2 regarding the first transmission time in Example 1 are applicable. In addition, by combining TA closed-loop adjustment, the transmission time when the UE sends the uplink signal to the base station device 2 can be determined.

[0140] In another example, when multiple uplink signals exist between the UE and base station device 2, and at least one of these uplink signals can be used for TA measurement—for example, one or more of PUSCH, PUCCH, SRS, or positioning SRS—then Scheme 1 regarding the first transmission time and TA closed-loop adjustment from Example 1 can be combined. Furthermore, if multiple uplink signals are available for TA measurement, one or more can be selected for TA measurement, such as one or more of the Physical Uplink Shared Channel (PUSCH) demodulation reference signal (DMRS), Physical Uplink Control Channel (PUCCH) DMRS, SRS, or positioning SRS.

[0141] In another example, when multiple uplink signals exist between the UE and base station device 2, and at least one of these uplink signals can be used for TA measurement, and all of these multiple uplink signals support the same frequency domain comb transmission, the at least one uplink signal may include one or more of SRS and positioning SRS. Scheme 1 or Scheme 2 in Example 1 can be used in combination, along with TA closed-loop adjustment. Optionally, if multiple uplink signals exist that can be used for TA measurement, one or more of them can be selected for TA measurement, for example, one or more of SRS and positioning SRS.

[0142] In the above embodiments, an uplink signal can also refer to an uplink channel. For example, if there is one uplink signal between the UE and the base station device 2, that uplink signal can also be an uplink channel; if there are multiple uplink signals between the UE and the base station device 2, each of the multiple uplink signals can be an uplink signal or an uplink channel; or some can be uplink signals and others can be uplink channels. This description also applies to other embodiments, which will not be repeated here.

[0143] Example 3

[0144] Figure 9This is a schematic diagram of a system architecture applicable to an embodiment of this application. Base station device 1 and base station device 2 operate in the same frequency band. There is no downlink between base station device 2 and the UE, and base station device 2 does not support or has its downlink function disabled in hardware. In this example, it is not important whether base station device 1 receives the uplink channel or uplink signal between the UE and base station device 2. In other words, base station device 1 can receive the uplink signal or uplink signal between the UE and base station device 2, or it can choose not to receive the uplink signal or uplink signal between the UE and base station device 2.

[0145] The scheme for determining the transmission time of the uplink signal in Example 1, such as the scheme of combining Scheme 1 or Scheme 2 with TA closed-loop adjustment, can also be applied to this example.

[0146] above Figures 3-9 This can be applied to scenarios where a second network device receives uplink signals from a terminal device, and how to determine and control the timing of uplink signal transmission. The following section will combine... Figure 10 This paper introduces a method for determining and controlling the transmission timing of uplink signals in scenarios where both the first and second network devices receive uplink signals from terminal devices.

[0147] Figure 10 This is a schematic flowchart of the communication method 900 provided in this application. Method 900 can be implemented by a terminal device or a device applied to the terminal device (e.g., a chip, processor, or circuit), and a network device or a device applied to the network device (e.g., a chip, processor, or circuit). Optionally, in the embodiments of this application, there can be multiple network devices (meaning two or more). The following embodiments use a terminal device and a network device as examples for illustration.

[0148] The system architecture applicable to method 900 can be found in [reference needed]. Figure 9 As shown, it will not be elaborated further.

[0149] 910. The terminal device sends the first uplink signal.

[0150] The first network device and the second network device respectively measure the first uplink signal and obtain a first measurement result and a second measurement result accordingly. That is, the first measurement result and the second measurement result are obtained by the first network device and the second network device respectively measuring the first uplink signal. The first measurement result or the second measurement result may include timing advance TA and / or signal received strength.

[0151] 920. The first network device acquires the second measurement result corresponding to the second network device.

[0152] 930. The first network device determines the timing adjustment amount based on the second measurement result and the first measurement result.

[0153] 940. The first network device sends the first information to the terminal device, and the first information indicates the timed adjustment amount.

[0154] For the sake of brevity, the TA and signal received strength determined by the first network device measuring the first uplink signal are denoted as the first TA (or TA1) and the first signal received strength, respectively; the TA and signal received strength determined by the second network device measuring the first uplink signal are denoted as the second TA (or TA2) and the second signal received strength, respectively. Taking the signal received strength as RSRP as an example, the first signal received strength can be represented as RSRP1, and the second signal received strength can be represented as RSRP2.

[0155] As stated above, the timing adjustment amount can be determined based on the TA or signal reception strength measured by the first network device and the second network device respectively, or based on the TA and signal reception strength.

[0156] As an example, the timing adjustment amount is determined based on TA:

[0157] 1) If TA1 > TA2 + threshold, the timing adjustment amount is determined to be TA2. In this implementation, the uplink signal of the UE is received using a second network device, such as a subsequent second uplink signal;

[0158] 2) If TA2 > TA1 + threshold, the timing adjustment amount is determined to be TA1. In this implementation, the uplink signal of the UE is received by the first network device, such as the subsequent second uplink signal; or,

[0159] 3) For cases other than 1) and 2) above, the timing adjustment amount is determined to be TA3, which is a value between TA1 and TA2. In this implementation, both the first network device and the second network device receive the UE's uplink signal, such as the subsequent second uplink signal.

[0160] As another example, the timing adjustment amount can be determined based on the received strength (or quality) of the uplink signal, such as the uplink signal's RSRP, signal-to-interference-plus-noise ratio (SINR), etc. For example:

[0161] 1) If RSRP1 > RSRP2 + threshold, the UE's TA adjustment amount is determined to be TA1. The UE's uplink signal is received by the first network device;

[0162] 2) If RSRP2 > RSRP1 + threshold, the UE's TA adjustment amount is determined to be TA2. For the UE's uplink signal, it is received by the second network device; or,

[0163] 3) In cases other than the two mentioned above, the UE's TA adjustment amount can be between TA1 and TA2. Both the first and second network devices receive the UE's uplink signal.

[0164] As another example, the timing adjustment amount can be determined based on the TA and the received strength (or quality) of the uplink signal. For example:

[0165] 1) If RSRP1 > RSRP2 + threshold 1, and TA2 > TA1 + threshold 2, the UE's TA adjustment amount is determined to be TA1. The UE's uplink signal is received by the first network device;

[0166] 2) If RSRP2 > RSRP1 + threshold 1, and TA1 > TA2 + threshold 2, the UE's TA adjustment is determined to be TA2. The UE's uplink signal is received by the second network device; or...

[0167] 3) In cases other than the two mentioned above, the UE's TA adjustment amount can be between TA1 and TA2. Both the first and second network devices receive the UE's uplink signal.

[0168] Furthermore, determining the TA adjustment amount is not limited to including parameters other than TA and / or signal received strength.

[0169] In the example above, the comparison of TA is based on a threshold, such as threshold 1. The comparison of RSRP is based on another threshold, such as threshold 2. Optionally, the two branches can also be set with different thresholds, for example, RSRP1 > RSRP2 + threshold 1, and TA2 > TA1 + threshold 2, with the timing adjustment amount determined as TA1; or, RSRP2 > RSRP1 + threshold 3, and TA1 > TA2 + threshold 4, with the timing adjustment amount determined as TA2. Other threshold settings are also possible and are not limited.

[0170] Overall, the network device that receives uplink signals is selected from those that are closer to the UE.

[0171] 950. The terminal device sends a second uplink signal based on the timing adjustment amount.

[0172] The terminal device sends a second uplink signal based on a timing adjustment. Accordingly, as described in step 930, in different implementations, the first network device and / or the second network device receive the second uplink signal.

[0173] Optionally, the first uplink signal can be PRACH, or any uplink signal sent by the UE after accessing the network.

[0174] In the technical solution corresponding to method 900, a method for determining the TA (Transmission Aspect) of an uplink without a corresponding downlink is provided, along with a method for receiving uplink signals from a terminal device in different implementations. In this solution, the terminal device can determine the TA for sending uplink signals to a second network device without a corresponding downlink. Furthermore, in different implementations, the network-side device receiving the uplink signal from the terminal device can be a first network device, a second network device, or both. This ensures good uplink signal reception performance in various scenarios.

[0175] The above is a detailed description of the communication method provided in this application. The following describes the communication device provided in this application.

[0176] Figure 11 This is a schematic structural diagram of the communication device 1000 provided in this application. The communication device 1000 can be a terminal device, or a device applied to a terminal device that can realize the corresponding functions of the terminal device in the method embodiments of this application, such as a chip, processor, or circuit. Alternatively, the communication device 1000 can be a network device, or a device applied to a network device that can realize the corresponding functions of the network device in the method embodiments of this application, such as a chip, processor, or circuit.

[0177] The communication device 1000 includes a processing module 1001, which may be a processor, processing board, processing unit, or processing device, etc., used to perform operations / processing implemented internally by the communication device 1000. Optionally, the communication device 1000 also includes a communication module 1002, which may also be called a transceiver module, transceiver, transceiver device, or transceiver unit, etc., used to perform receiving (or input) and / or sending (or output) operations.

[0178] In one implementation, the communication device 1000 may be a terminal device or a device applied to the terminal device that can realize the corresponding functions of the terminal device in the method embodiments of this application.

[0179] In one example, the communication module is used for:

[0180] Based on the first transmission time, one or more uplink signals are sent to the second network device, and there is no downlink between the communication device and the second network device;

[0181] Receive first information from the first network device, the first information indicating a timing adjustment amount, the timing adjustment amount being determined based on at least one of the one or more uplink signals;

[0182] The processing module is used to adjust the first launch time based on the timing adjustment amount.

[0183] In another example, the communication module is used for:

[0184] Receive a paging message from the first network device, the paging message containing the first information; or...

[0185] Receive MAC CE signaling from the first network device, the MAC CE signaling containing the first information.

[0186] In one example, the communication module is used for:

[0187] Send the first uplink signal;

[0188] Receive first information, the first information indicating a timing adjustment amount, the timing adjustment amount being determined based on measurement results obtained by the first network device and the second network device respectively from measuring the first uplink signal; and,

[0189] The second uplink signal is sent based on the timing adjustment amount.

[0190] In one example, the measurement results include timing advance TA and / or signal reception strength.

[0191] In another implementation, the communication device 1000 may be a network device or a device applied to a network device that can realize the corresponding functions of the network device in the method embodiments of this application.

[0192] In one example, the communication module is used for:

[0193] The timing advance information is obtained from the second network device. The timing advance information is obtained by the second network device from measuring at least one uplink signal from one or more uplink signals from the terminal device. There is no downlink between the second network device and the terminal device.

[0194] The processing module is used to: determine the timing adjustment amount based on the information of the TA; and,

[0195] The communication module is used to: send first information, the first information indicating the timing adjustment amount, the timing adjustment amount being used by the terminal device to adjust the first transmission time of the uplink signal sent to the second network device.

[0196] In another example, the communication module is used for:

[0197] Send a paging message, the paging message containing the first information; or...

[0198] Send MAC CE signaling, which includes the first information.

[0199] In another example, the communication module and the processing module are used to measure a first uplink signal from the terminal device and obtain a first measurement result;

[0200] The communication module is configured to acquire a second measurement result from a second network device, the second measurement result being determined by the second network device measuring the first uplink signal, wherein there is no downlink between the terminal device and the second network device; and...

[0201] The processing module is used to determine a timing adjustment amount based on the first measurement result and the second measurement result. The timing adjustment amount is used by the terminal device to adjust the transmission time of the second uplink signal sent to the second network device.

[0202] In another example, the first measurement result or the second measurement result includes the TA; the processing module is used to:

[0203] If the difference between the first timing adjustment (TA) and the second timing adjustment (TA) is greater than the first threshold, the timing adjustment amount is determined to be the second timing adjustment (TA); or,

[0204] If the difference between the second timing adjustment (TA) and the first timing adjustment (TA) is greater than the first threshold, the timing adjustment amount is determined to be the first timing adjustment (TA).

[0205] Wherein, the first TA is the TA determined by the first network device through measurement of the first uplink signal, and the second TA is the TA determined by the second network device through measurement of the first uplink signal.

[0206] In another example, the first measurement result or the second measurement result includes the received signal strength; the processing module is used to:

[0207] If the difference between the received strength of the first signal and the received strength of the second signal is greater than the second threshold, the timing adjustment amount is determined to be the first TA;

[0208] or,

[0209] If the difference between the second signal received strength and the first signal received strength is greater than the second threshold, the timing adjustment amount is determined to be the second TA;

[0210] Wherein, the first signal received strength and the first TA are obtained by the first network device measuring the first uplink signal, and the second signal received strength and the second TA are obtained by the second network device measuring the first uplink signal.

[0211] In another example, the first measurement result or the second measurement result includes: the TA and the signal received strength; and the processing module is used for:

[0212] If the difference between the second timing adjustment (TA) and the first timing adjustment (TA) is greater than the first threshold, and the difference between the first signal received strength and the second signal received strength is greater than the second threshold, then the timing adjustment amount is the first timing adjustment (TA); or,

[0213] If the difference between the first TA and the second TA is greater than the first threshold, and the difference between the second signal received strength and the first signal received strength is greater than the second threshold, then the timing adjustment amount is the second TA.

[0214] Wherein, the first signal received strength and the first TA are obtained by the first network device measuring the first uplink signal, and the second signal received strength and the second TA are obtained by the second network device measuring the first uplink signal.

[0215] Furthermore, it should be noted that the aforementioned communication module and / or processing module can be implemented through virtual modules. For example, the processing module can be implemented through software functional units or virtual devices, and the communication module can be implemented through software functions or virtual devices. Alternatively, the processing module or communication module can also be implemented through physical devices, such as chips / circuits (e.g., integrated circuits or logic circuits). The communication module can be an input / output circuit and / or a communication interface, performing input operations (corresponding to the aforementioned receiving operation) and output operations (corresponding to the aforementioned sending operation); the processing module is an integrated processor, microprocessor, or circuit (e.g., integrated circuits, logic circuits).

[0216] The module division in this application is illustrative and represents only one logical functional division. In actual implementation, other division methods are possible. Furthermore, the functional modules in the various examples of this application can be integrated into a single processor, exist as separate physical entities, or be integrated into a single module. The integrated modules described above can be implemented in hardware, as software functional modules, or a combination of hardware and software.

[0217] Figure 12This is a schematic structural diagram of another communication device provided in this application. The communication device 1100 can be used to implement the functions of any communication device (e.g., a terminal device or a network device) in the communication system described in the foregoing examples. The communication device 1100 may include at least one processor 1110. Optionally, the processor 1110 (or processing device) is coupled to a memory, which may be located within the communication device, integrated with the processor, or located outside the communication device. For example, the communication device 1100 may also include at least one memory 1120. The memory 1120 stores computer programs, instructions, or data necessary for implementing any of the above method embodiments; the processor 1110 may execute the computer programs, instructions, or data stored in the memory 1120 to perform the corresponding functions of the terminal device or network device in any of the above embodiments.

[0218] Optionally, the communication device 1100 may further include a communication interface 1130, through which the communication device 1100 can interact with other devices. For example, the communication interface 1130 may be a transceiver, circuit, bus, module, pin, or other type of communication interface. When the communication device 1100 is a chip-type device or circuit, the communication interface 1130 in the device 1100 may also be an input / output circuit, capable of inputting information (or receiving information) and / or outputting information (or sending information). The processor may be an integrated circuit or logic circuit, etc., and the processor can determine the output information based on the input information.

[0219] The coupling in this application refers to indirect coupling or communication connection between devices, units, or modules, which can be electrical, mechanical, or other forms, used for information exchange between devices, units, or modules. The processor 1110 may operate in conjunction with the memory 1120 and the communication interface 1130. This application does not limit the connection medium between the processor 1110, the memory 1120, and the communication interface 1130.

[0220] Figure 13 This is a schematic structural diagram of the chip provided in this application. Chip 30 includes circuit 31 and communication interface 32. Circuit 31 can be a logic circuit, integrated circuit, etc., and communication interface 32 can also be called input / output circuit, input / output interface, interface circuit, etc., which can input information (or receive information) or output information (or send information). Chip 30 can execute the methods executed by terminal device or network device (e.g., first network device) in various embodiments of this application.

[0221] In addition, this application also provides a computer-readable storage medium storing computer instructions that, when executed on a computer, cause operations and / or processes performed by a terminal device or network device (e.g., a first network device) in the various method embodiments of this application to be executed.

[0222] This application also provides a computer program product, which includes computer program code or instructions. When the computer program code or instructions are run on a computer, the operations and / or processes performed by a terminal device or network device (e.g., a first network device) in the various method embodiments of this application are executed.

[0223] Furthermore, this application also provides a chip including a processor. A memory for storing a computer program is provided independently of the chip, and the processor is used to execute the computer program stored in the memory, so that operations and / or processes performed by a terminal device or network device (e.g., a first network device) in any method embodiment are performed. Further, the chip may also include a communication interface. The communication interface may be an input / output interface or an interface circuit, etc. Further, the chip may also include the memory.

[0224] This application provides a communication system, including the terminal device and network device described in the above method embodiments. The network device may include a first network device and a second network device, and there may be one or more second network devices, without limitation.

[0225] Those skilled in the art will understand that, for the sake of convenience and brevity, the specific working processes of the systems, devices, and units described above can be referred to the corresponding processes in the foregoing method embodiments, and will not be repeated here.

[0226] In the embodiments of this application, "instruction" can include direct instruction, indirect instruction, explicit instruction, and implicit instruction. When describing a certain instruction information for instructing A, it can be understood that the instruction information carries A, which can be a direct instruction to A or an indirect instruction to A. Indirect instruction can refer to directly instructing B through the instruction information, and the correspondence between B and A, to achieve the purpose of instructing A through the instruction information. The correspondence between B and A can be predefined by the protocol, pre-stored, or obtained through configuration between network elements.

[0227] The processor in this application embodiment has signal processing capabilities and can be a central processing unit (CPU), a general-purpose processor, a digital signal processor (DSP), an application-specific integrated circuit (ASIC), a field-programmable gate array (FPGA), or other programmable logic devices, discrete gate or transistor logic devices, or discrete hardware components. It can implement or execute the methods, steps, and logic block diagrams disclosed in this application. The general-purpose processor can be a microprocessor or any conventional processor. The steps of the methods disclosed in this application can be directly implemented by the hardware processor, or implemented by a combination of hardware and software modules within the processor. The software modules can reside in random access memory, flash memory, read-only memory, programmable read-only memory, electrically erasable programmable memory, registers, or other mature storage media in the art. This storage medium is located in memory; the processor reads information from the memory and, in conjunction with its hardware, completes the steps of the above methods.

[0228] In the embodiments of this application, the memory can be volatile memory or non-volatile memory, or it can include both volatile and non-volatile memory. The non-volatile memory can be read-only memory (ROM), programmable read-only memory (PROM), erasable programmable read-only memory (EPROM), electrically erasable programmable read-only memory (EEPROM), or flash memory. The volatile memory can be random access memory (RAM), which is 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 synchronous dynamic random access memory (DDR SDRAM), enhanced synchronous dynamic random access memory (ESDRAM), synchronous linked dynamic random access memory (SLDRAM), and direct rambus RAM (DR RAM). It should be noted that the memory used in the systems and methods described herein is intended to include, but is not limited to, these and any other suitable types of memory.

[0229] The technical solutions provided in this application can be implemented in whole or in part through software, hardware, firmware, or any combination thereof. When implemented using software, they can be implemented in whole or in part as a computer program product. The computer program product includes one or more computer instructions. When the computer program instructions are loaded and executed on a computer, all or part of the processes or functions described in this application are generated. The computer can be a general-purpose computer, a special-purpose computer, a computer network, a terminal device, an access network device, or other programmable device. The computer instructions can be stored in a computer-readable storage medium or transmitted from one computer-readable storage medium to another. For example, the computer instructions can be transmitted from one website, computer, server, or data center to another website, computer, server, or data center via wired (e.g., coaxial cable, optical fiber, digital subscriber line (DSL)) or wireless (e.g., infrared, wireless, microwave, etc.) means. The computer-readable storage medium can be any available medium that a computer can access or a data storage device such as a server or data center that integrates one or more available media. The available media may be magnetic media (e.g., floppy disks, hard disks, magnetic tapes), optical media (e.g., digital video discs (DVDs)), or semiconductor media, etc.

[0230] In the embodiments of this application, "at least one" refers to one or more items. "More than one" means two or more items. "And / or" is used to describe the relationship between related objects, indicating that there can be three relationships. For example, A and / or B can represent three situations: A exists alone, A and B exist simultaneously, and B exists alone.

[0231] The term "comprising" and any variations thereof used in the embodiments of this application are intended to cover non-exclusive inclusion. For example, a process, method, system, product, or device that includes a series of steps or units is not limited to the steps or units listed, but may optionally include other steps or units not listed, or may optionally include other steps or units inherent to these processes, methods, products, or devices.

[0232] In this application, examples may reference each other without logical contradiction. For example, methods and / or terms between method embodiments may reference each other, functions and / or terms between device embodiments may reference each other, and functions and / or terms between device examples and method examples may reference each other.

[0233] Those skilled in the art will recognize that the units and algorithm steps of the various examples described in conjunction with the embodiments disclosed herein can be implemented in electronic hardware, or a combination of computer software and electronic hardware. Whether these functions are implemented 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 this application.

[0234] In the several embodiments provided in this application, it should be understood that the disclosed systems, apparatuses, and methods can be implemented in other ways. For example, the apparatus embodiments described above are merely illustrative; for instance, the division of units is only a logical functional division, and in actual implementation, there may be other division methods. For example, multiple units or components may be combined or integrated into another system, or some features may be ignored or not executed. Furthermore, the coupling or direct coupling or communication connection shown or discussed may be through some interfaces; the indirect coupling or communication connection between apparatuses or units may be electrical, mechanical, or other forms.

[0235] The units described as separate components may or may not be physically separate. The components shown as units may or may not be physical units; that is, they may be located in one place or distributed across multiple network units. Some or all of the units can be selected to achieve the purpose of this embodiment according to actual needs.

[0236] In addition, the functional units in the various embodiments of this application can be integrated into one processing unit, or each unit can exist physically separately, or two or more units can be integrated into one unit.

[0237] If the aforementioned functions are implemented as software functional units and sold or used as independent products, they can be stored in a computer-readable storage medium. Based on this understanding, the technical solution of this application, in essence, or the part that contributes to the prior art, or a portion of the technical solution, can be embodied in the form of a software product. This computer software product is stored in a storage medium and includes several instructions to cause a computer device (which may be a personal computer, server, or network device, etc.) to execute all or part of the steps of the methods described in the various embodiments of this application. The aforementioned storage medium includes various media capable of storing program code, such as USB flash drives, portable hard drives, read-only memory (ROM), random access memory (RAM), magnetic disks, or optical disks.

[0238] The above description is merely a specific embodiment of this application, but the scope of protection of this application is not limited thereto. Any variations or substitutions that can be easily conceived by those skilled in the art within the scope of the technology disclosed in this application should be included within the scope of protection of this application. Therefore, the scope of protection of this application should be determined by the scope of the claims.

Claims

1. A communication method, characterized in that, Applied to terminal devices, including: Based on the first transmission time, one or more uplink signals are sent to the second network device, and there is no downlink between the terminal device and the second network device; Receive first information from a first network device, the first information indicating a timing adjustment amount, the timing adjustment amount being determined based on at least one of the one or more uplink signals; The first launch time is adjusted based on the aforementioned timing adjustment amount.

2. The method according to claim 1, characterized in that, The first transmission time is the transmission time when the terminal device first sends the one or more uplink signals, and the first transmission time is determined based on the timing of the first network device.

3. The method according to claim 2, characterized in that, The first transmission time is determined based on the timing of the first network device, including: The first transmission time is aligned with the timing of the first network device, and the timing of the first network device is: based on the downlink timing of the first network device, the timing of the first network device is advanced by half of TA.

4. The method according to claim 3, characterized in that, In the frequency domain, each of the one or more uplink signals is transmitted on one of the M subcarriers. In the time domain, each uplink signal includes an equivalent cyclic prefix (CP) and valid data. The equivalent CP includes the cyclic prefix CP corresponding to the second network device and the duration of the first period of the M periods corresponding to a data segment within a time-domain symbol. The duration of the valid data includes the duration of the remaining M-1 periods of the M periods excluding the first period, where M is a positive integer.

5. The method according to any one of claims 1 to 4, characterized in that, The receipt of first information from the first network device includes: Receive a paging message from the first network device, the paging message containing the first information; or... Receive MAC CE signaling from the first network device, the MAC CE signaling containing the first information.

6. The method according to any one of claims 1 to 5, characterized in that, The first network device and the second network device operate in different frequency bands, or the first network device and the second network device operate in the same frequency band.

7. A communication method, characterized in that, Applied to terminal devices, including: Send the first uplink signal; Receive first information, the first information indicating a timing adjustment amount, the timing adjustment amount being determined based on the measurement results obtained by the first network device and the second network device respectively from measuring the first uplink signal; The second uplink signal is sent based on the timing adjustment amount.

8. The method according to claim 7, characterized in that, The measurement results include timing advance TA and / or signal reception strength.

9. The method according to claim 8, characterized in that, The measurement results include the TA; Furthermore, the timing adjustment amount is determined based on the measurement results obtained by the first network device and the second network device from their respective uplink signal measurements, including: If the difference between the first timing adjustment (TA) and the second timing adjustment (TA) is greater than the first threshold, the timing adjustment amount is the second timing adjustment (TA). If the difference between the second timing adjustment (TA) and the first timing adjustment (TA) is greater than the first threshold, the timing adjustment amount is the first timing adjustment (TA). Wherein, the first TA is the TA determined by the first network device through measurement of the first uplink signal, and the second TA is the TA determined by the second network device through measurement of the first uplink signal.

10. The method according to claim 8, characterized in that, The measurement results include the received signal strength; and, The timing adjustment amount is determined based on the measurement results obtained by the first network device and the second network device from the uplink signal measurement, including: If the difference between the received strength of the first signal and the received strength of the second signal is greater than the second threshold, the timing adjustment amount is the first TA; or, If the difference between the second signal received strength and the first signal received strength is greater than the second threshold, the timing adjustment amount is the second TA; Wherein, the first signal received strength and the first TA are obtained by the first network device measuring the first uplink signal, and the second signal received strength and the second TA are obtained by the second network device measuring the first uplink signal.

11. The method according to claim 8, characterized in that, The measurement results include the TA and the received signal strength; Furthermore, the timing adjustment amount is determined based on the measurement results obtained by the first network device and the second network device from their respective uplink signal measurements, including: If the difference between the second timing adjustment (TA) and the first timing adjustment (TA) is greater than the first threshold, and the difference between the first signal received strength and the second signal received strength is greater than the second threshold, then the timing adjustment amount is the first timing adjustment (TA); or, If the difference between the first TA and the second TA is greater than the first threshold, and the difference between the second signal received strength and the first signal received strength is greater than the second threshold, then the timing adjustment amount is the second TA. Wherein, the first signal received strength and the first TA are obtained by the first network device measuring the first uplink signal, and the second signal received strength and the second TA are obtained by the second network device measuring the first uplink signal.

12. A communication method, characterized in that, Applied to the first network device, including: The timing advance information is obtained from the second network device. The timing advance information is obtained by the second network device from measuring at least one uplink signal from one or more uplink signals from the terminal device. There is no downlink between the second network device and the terminal device. Based on the information from the TA, determine the timing adjustment amount; Send a first message, the first message indicating the timing adjustment amount, the timing adjustment amount being used by the terminal device to adjust the first transmission time of the uplink signal sent to the second network device.

13. The method according to claim 12, characterized in that, The first transmission time is the transmission time when the terminal device first sends the one or more uplink signals, and the first transmission time is determined based on the timing of the first network device.

14. The method according to claim 12, characterized in that, The first transmission time is determined based on the timing of the first network device, including: The first transmission time is aligned with the timing of the first network device, and the timing of the first network device is: based on the downlink timing of the first network device, the timing of the first network device is advanced by half of TA.

15. The method according to claim 14, characterized in that, In the frequency domain, each of the one or more uplink signals is transmitted on one of the M subcarriers. In the time domain, each uplink signal includes an equivalent cyclic prefix (CP) and valid data. The equivalent CP includes the cyclic prefix CP corresponding to the second network device and the duration of the first period of the M periods corresponding to a data segment within a time-domain symbol. The duration of the valid data includes the duration of the remaining M-1 periods of the M periods excluding the first period, where M is a positive integer.

16. The method according to any one of claims 12 to 15, characterized in that, The sending of the first information includes: Send a paging message, the paging message containing the first information; or... Send MAC CE signaling, which includes the first information.

17. The method according to any one of claims 12 to 16, characterized in that, The first network device and the second network device operate in different frequency bands, or the first network device and the second network device operate in the same frequency band.

18. A communication method, characterized in that, Applied to a first network device, the method includes: The first uplink signal from the terminal device is measured to obtain the first measurement result; A second measurement result is obtained from the second network device, the second measurement result being determined by the second network device measuring the first uplink signal, and there is no downlink between the terminal device and the second network device; Based on the first measurement result and the second measurement result, a timing adjustment amount is determined. The timing adjustment amount is used by the terminal device to adjust the transmission time of the second uplink signal sent to the second network device.

19. The method according to claim 18, characterized in that, The first measurement result or the second measurement result includes: timing advance TA and / or signal reception strength.

20. The method according to claim 19, characterized in that, The first measurement result or the second measurement result includes the TA; The step of determining the timing adjustment amount based on the first measurement result and the second measurement result includes: If the difference between the first timing adjustment (TA) and the second timing adjustment (TA) is greater than the first threshold, the timing adjustment amount is determined to be the second timing adjustment (TA); or, If the difference between the second timing adjustment (TA) and the first timing adjustment (TA) is greater than the first threshold, the timing adjustment amount is determined to be the first timing adjustment (TA). Wherein, the first TA is the TA determined by the first network device through measurement of the first uplink signal, and the second TA is the TA determined by the second network device through measurement of the first uplink signal.

21. The method according to claim 19, characterized in that, The first measurement result or the second measurement result includes the signal received strength; The step of determining the timing adjustment amount based on the first measurement result and the second measurement result includes: If the difference between the received strength of the first signal and the received strength of the second signal is greater than the second threshold, the timing adjustment amount is determined to be the first TA; or, If the difference between the second signal received strength and the first signal received strength is greater than the second threshold, the timing adjustment amount is determined to be the second TA; Wherein, the first signal received strength and the first TA are obtained by the first network device measuring the first uplink signal, and the second signal received strength and the second TA are obtained by the second network device measuring the first uplink signal.

22. The method according to claim 19, characterized in that, The first measurement result or the second measurement result includes: the TA and the signal received strength; The step of determining the timing adjustment amount based on the first measurement result and the second measurement result includes: If the difference between the second timing adjustment (TA) and the first timing adjustment (TA) is greater than the first threshold, and the difference between the first signal received strength and the second signal received strength is greater than the second threshold, then the timing adjustment amount is determined to be the first timing adjustment (TA); or, If the difference between the first TA and the second TA is greater than the first threshold, and the difference between the second signal received strength and the first signal received strength is greater than the second threshold, then the timing adjustment amount is determined to be the second TA. Wherein, the first signal received strength and the first TA are obtained by the first network device measuring the first uplink signal, and the second signal received strength and the second TA are obtained by the second network device measuring the first uplink signal.

23. A communication device, characterized in that, Includes modules or units for performing the method as described in any one of claims 1-22.

24. A communication device, characterized in that, The system includes a communication interface and circuitry. The communication interface is used to acquire information required to perform the method as described in any one of claims 1-11, and to send the information to the circuitry, which is used to perform the method as described in any one of claims 1-11 based on the received information; or... The communication interface is used to acquire information required to perform the method as described in any one of claims 12-22, and to send the information to the circuit, which is used to perform the method as described in any one of claims 12-22 based on the received information.

25. A communication device, characterized in that, The device includes a processor coupled to a memory, the processor being configured to execute a computer program or instructions stored in the memory to cause the communication device to perform the method as described in any one of claims 1-22.

26. A computer-readable storage medium, characterized in that, The computer-readable storage medium stores computer instructions that, when executed on a computer, implement the method as described in any one of claims 1-22.

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