Communication method and communication apparatus

Abstract

The present application provides a communication method and a communication apparatus. A terminal device separately performs link measurement on an SBFD symbol and a non-SBFD symbol. The terminal device performs the link measurement on the SBFD symbol, and reports a link failure on the SBFD symbol to the network device on the basis of the link measurement on the SBFD symbol, so that the network device can promptly learn the link failure on the SBFD symbol when periodic CSI reporting cannot promptly reflect link degradation. In this case, since the terminal device is highly likely to be unable to demodulate a downlink control channel and a data channel on the SBFD symbol, on the basis of the link failure on the SBFD symbol, a network element device avoids scheduling uplink and / or downlink transmission on the SBFD symbol, thereby avoiding waste of scheduling resources; or the network device configures cross-link interference (CLI) measurement to help the terminal device recover link quality.

Description

Communication method and communication apparatus

[0001] This application claims priority to the Chinese Patent Application No. 202411099961.2, filed on August 9, 2024, and entitled "Communication method and communication apparatus", the content of which is incorporated herein by reference in its entirety. TECHNICAL FIELD

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

[0003] In a time division duplexing (TDD) system, downlink (DL) usually occupies the main time resource, which causes the coverage imbalance between DL and uplink (UL). Compared with a frequency division duplexing (FDD) system, the uplink coverage of the TDD system is poorer and the latency is larger. To solve the problems of poor uplink coverage and large latency in the TDD system, a subband full duplex (SBFD) scheme is proposed. In the SBFD scheme, one carrier is divided into multiple subbands, and the transmission directions of different subbands can be different. For example, one carrier is divided into two subbands, one subband is used for uplink transmission, and the other subband is used for downlink transmission. In the SBFD scheme, on an SBFD symbol, a network device can implement simultaneous reception and transmission through different subbands, and a terminal device can receive on a downlink subband or transmit on an uplink subband, and cannot simultaneously receive and transmit, that is, the network device is a subband full duplex, and the terminal device is a subband half duplex. If there is at least one DL subband and at least one UL subband on a time domain symbol, the time domain symbol is referred to as an SBFD symbol.

[0004] Considering that the interference on the SBFD symbol and the non-SBFD symbol can be different, the network side needs to know the link quality on the SBFD symbol and the non-SBFD symbol respectively. In a new radio (NR) system, separate channel state information (CSI) reporting is supported for the SBFD symbol and the non-SBFD. According to the current link monitoring mechanism, if the CSI-RS resource configured by the network side for link monitoring only appears on the SBFD symbol, unnecessary reconstruction or beam recovery process can be caused, because the link quality on the non-SBFD symbol can still work at this time; if the CSI-RS resource only appears on the non-SBFD symbol, the network side cannot perceive the link failure on the SBFD symbol; or if part of the CSI-RS resource appears on the SBFD symbol and the other part appears on the non-SBFD symbol, the link failure or beam failure is triggered only when the reception performance of all CSI-RS resources is lower than a threshold, therefore, the network side still cannot know the link failure on the SBFD symbol.

[0005] Therefore, how the network side knows the link failure on the SBFD symbol in time is a problem to be solved. SUMMARY

[0006] The present application provides a communication method and a communication device, which can enable the network device to know the link failure on the SBFD symbol in time.

[0007] In a first aspect, a communication method is provided, which can be executed by a communication device or a module (for example, a processor, a chip, a chip system, an integrated circuit, etc., which can also be a logic module, hardware and / or software capable of realizing all or part of the functions of the communication device) applied to the communication device, which can be a terminal device in the method embodiment. The method can include: performing link measurement, wherein the link measurement includes link measurement on a first reference signal resource and link measurement on a second reference signal resource, the transmission occasion of the first reference signal resource is located on an SBFD symbol, the transmission occasion of the second reference signal resource is located on a non-SBFD symbol, and / or the link measurement includes link measurement on a first transmission occasion and link measurement on a second transmission occasion on a third reference signal resource, the first transmission occasion is located on an SBFD symbol, and the second transmission occasion is located on a non-SBFD symbol; and sending a measurement report based on the link measurement on the SBFD symbol, the measurement report being used to indicate the link failure on the SBFD symbol, the link measurement on the SBFD symbol including the link measurement on the first reference signal resource and / or the link measurement on the first transmission occasion of the third reference signal resource.

[0008] In the technical solution of the present application, the terminal device performs link measurement on the SBFD symbol, and reports the link failure on the SBFD symbol to the network device based on the link measurement on the SBFD symbol, so that the network device can learn the link failure on the SBFD symbol in time in the case that the periodic CSI reporting cannot reflect the link deterioration in time, and enable the network device to avoid scheduling data on the SBFD symbol, to avoid wasting resources (the terminal device is highly likely to fail to demodulate the downlink control channel and the data channel on the SBFD symbol), or to enable the network device to configure cross link interference (CLI) measurement to help the terminal device recover the link quality.

[0009] It should be understood that when the reference signal resources configured by the network device for link measurement include both the reference signal resources for link measurement on the SBFD symbol and the reference signal resources for link measurement on the non-SBFD symbol, or the reference signal resources for link measurement include transmission occasions located on the SBFD symbol and transmission occasions located on the non-SBFD symbol, the terminal device performs link measurement on the SBFD symbol on the reference signal resources for link measurement on the SBFD symbol and / or the transmission occasions on the SBFD symbol, and makes a decision on link failure based on the link measurement on these resources and triggers a measurement report indicating the link failure on the SBFD symbol.

[0010] In combination with the first aspect, in some implementations of the first aspect, the sending of the measurement report based on the link measurement on the SBFD symbol comprises: based on the link measurement on the SBFD symbol, sending the measurement report in a case where it is determined that the link failure on the SBFD symbol occurs.

[0011] In this implementation, the terminal device performs link measurement on the SBFD symbol, and after determining to trigger the reporting of the link failure on the SBFD symbol, sends a measurement report related to the link measurement on the SBFD symbol to the network device, to indicate the link failure on the SBFD symbol.

[0012] In combination with the first aspect, in some implementations of the first aspect, the method further comprises: receiving a first message containing configuration information for indicating the link measurement on the SBFD symbol, wherein the configuration information comprises a first configuration for indicating: the first reference signal resource; and / or, the third reference signal resource.

[0013] In combination with the first aspect, in some implementations of the first aspect, the configuration information further comprises a second configuration, and the second configuration comprises one or more of the following information:

[0014] A decision condition for determining a triggering of a link failure event;

[0015] A threshold of a number of link failure events associated with a link failure on the SBFD symbol;

[0016] A timer associated with a link failure on the SBFD symbol;

[0017] A resource for sending the measurement report;

[0018] A threshold of a reception performance for determining a triggering of a link failure event.

[0019] In this implementation, the terminal device receives a first message from the network device, the first message carrying configuration information for link measurement on the SBFD symbol, for the terminal device to perform link measurement on the SBFD symbol according to the configuration information, determine whether a link failure event on the SBFD symbol occurs, and whether to trigger reporting of the link failure on the SBFD symbol, etc. The network device indicates the configuration of the link measurement on the SBFD symbol to the terminal device.

[0020] With reference to the first aspect, in some implementations of the first aspect, the method further includes: not sending an uplink signal on the all SBFD symbols or the first SBFD symbol according to the second indication information.

[0021] In this implementation, the network device configures the terminal device not to send an uplink signal on all SBFD symbols or SBFD symbols on which a link failure is measured after triggering reporting of the link failure on the SBFD symbol, and considering the symmetry of the CLI, interference of the terminal device on downlink transmission of other terminal devices on the SBFD symbol can be avoided.

[0022] With reference to the first aspect, in some implementations of the first aspect, the method further includes: resuming the uplink transmission and / or resuming the link measurement according to the third indication information.

[0023] In this implementation, the network device configures the terminal device to resume uplink transmission on a corresponding SBFD symbol (e.g., all SBFD symbols or SBFD symbols on which a link failure is measured) and / or resume link measurement after a specified time after triggering reporting of the link failure on the SBFD symbol. After the terminal device triggers reporting of the link failure on the SBFD symbol, the network device needs a certain time to avoid CLI, and during this period, the terminal device continues to perform link measurement on the SBFD symbol, which may cause the terminal device to repeatedly trigger a link failure on the SBFD symbol multiple times, wasting uplink resources. After the network device completes the CLI avoidance, the terminal device can resume the uplink transmission on the SBFD symbol.

[0024] In a second aspect, a communication method is provided, which can be performed by a communication device or a module (e.g., a processor, a chip, a chip system, etc., which can also be a logical module, hardware and / or software capable of realizing all or part of the functions of the communication device) applied to a communication device (which can be a network device in the method embodiments). The method can include: receiving a measurement report, the measurement report being used to indicate a link failure on an SBFD symbol, the measurement report being sent based on a link measurement on the SBFD symbol, wherein the link measurement includes a link measurement on a first reference signal resource and a link measurement on a second reference signal resource, a transmission occasion of the first reference signal resource being located on the SBFD symbol, a transmission occasion of the second reference signal resource being located on a non-SBFD symbol, and / or the link measurement includes a link measurement on a first transmission occasion and a link measurement on a second transmission occasion on a third reference signal resource, the first transmission occasion being located on the SBFD symbol, and the second transmission occasion being located on a non-SBFD symbol.

[0025] The technical effects of the method of the second aspect refer to the corresponding descriptions of the technical effects of the first aspect.

[0026] In combination with the second aspect, in some implementations of the second aspect, the measurement report is sent based on a link failure on the SBFD symbol, the link failure on the SBFD symbol being determined based on a link measurement on the SBFD symbol.

[0027] In combination with the second aspect, in some implementations of the second aspect, the method further includes: sending a first message to a terminal device, the first message containing configuration information used to indicate the link measurement on the SBFD symbol, the configuration information including a first configuration, the first configuration being used to indicate: the first reference signal resource; and / or the third reference signal resource.

[0028] In combination with the second aspect, in some implementations of the second aspect, the configuration information further includes a second configuration, the second configuration including one or more of the following information:

[0029] a decision condition used to determine a triggering of a link failure event;

[0030] a threshold of a number of link failure events associated with the link failure on the SBFD symbol;

[0031] a timer associated with the link failure on the SBFD symbol;

[0032] a resource used to send the measurement report;

[0033] a threshold of a reception performance used to determine a triggering of a link failure event.

[0034] In some implementations of the first aspect or the second aspect, the first message includes a first information element, the first information element being used to indicate configuration information of the link measurement on the SBFD symbol.

[0035] In this implementation, the network device indicates the configuration information of the link measurement on the SBFD symbol through the first information element in the first message. The first information element can be a newly added information element for indicating the configuration information of the link measurement on the SBFD symbol.

[0036] In some implementations of the first aspect or the second aspect, the first message includes a first information, the first information being used to instruct the terminal device to perform the link measurement on the SBFD symbol; and the first message further includes a second information element, the second information element being used to indicate configuration information of the link measurement on a non-SBFD symbol.

[0037] In this implementation, the network device explicitly instructs the terminal device to perform the link measurement on the SBFD symbol through the first message in the first message. In addition, the first message can further include a second information element, the second information element being used to indicate the configuration information of the link measurement on the non-SBFD symbol. The configuration related to the link measurement on the SBFD symbol can reuse part of the configuration information of the link measurement on the non-SBFD symbol, such as one or more of a threshold for determining whether a link failure event occurs, whether to trigger a link failure, a number of times of a link failure event related to triggering a link failure, a timer related to triggering a link failure, a threshold for determining a reception performance of triggering a link failure event, and the like.

[0038] In some implementations of the first aspect or the second aspect, the decision condition for determining the triggering of the link failure event includes: triggering a link failure event on the SBFD symbol in a case where the link quality on the SBFD symbol is measured to be equal to or lower than a threshold on all of the first reference signal resources and / or all of the third reference signal resources; or triggering a link failure event on the SBFD symbol in a case where the link quality on the SBFD symbol is measured to be equal to or lower than a threshold on at least one of the first reference signal resources or at least one of the third reference signal resources.

[0039] In some implementations of the first aspect or the second aspect, in a case where the link quality on the SBFD symbol is measured to be equal to or lower than a threshold on at least one of the first reference signal resources or at least one of the third reference signal resources, triggering a link failure event on the SBFD symbol, the measurement report includes first indication information, the first indication information being used to indicate the first reference signal resource and / or the third reference signal resource on which the link quality is measured to be equal to or lower than the threshold.

[0040] In this implementation, considering that different SBFD slots are subjected to different CLI, the network can configure different reference signal resources in different SBFD slots, and triggering link failure reporting on a resource-by-resource basis can help the network to understand the interference in different SBFD slots.

[0041] In some implementations of the first aspect or the second aspect, the configuration information further includes second indication information, which is used to indicate any one of the following:

[0042] After triggering the reporting of link failure on the SBFD symbol, uplink signals are transmitted on all SBFD symbols;

[0043] After triggering the reporting of link failure on the SBFD symbol, no uplink signals are transmitted on all SBFD symbols;

[0044] After triggering the reporting of link failure on the SBFD symbol, uplink signals are transmitted on the first SBFD symbol corresponding to the first reference signal resource and / or the third reference signal resource that is measured to have a link quality equal to or lower than a threshold; or

[0045] After triggering the reporting of link failure on the SBFD symbol, no uplink signals are transmitted on the first SBFD symbol corresponding to the first reference signal resource and / or the third reference signal resource that is measured to have a link quality equal to or lower than a threshold.

[0046] In this implementation, after triggering the reporting of link failure on the SBFD symbol, the terminal device transmits or does not transmit uplink signals on the corresponding SBFD symbol according to the configuration of the network device in the configuration information, which can flexibly adapt to the link condition and improve the utilization efficiency of transmission resources as much as possible while avoiding cross link interference (CLI).

[0047] In some implementations of the first aspect or the second aspect, the configuration information further includes third indication information, which includes one or more of the following information:

[0048] Time for resuming uplink transmission on all SBFD symbols corresponding to the first reference signal resource and / or all SBFD symbols corresponding to the third reference signal resource;

[0049] Time for resuming uplink transmission on the SBFD symbol corresponding to the first reference signal resource and / or the SBFD symbol corresponding to the third reference signal that is measured to have a link quality equal to or lower than a threshold;

[0050] a time of resuming link measurement on all of the first reference signal resources and / or all of the third reference signal resources;

[0051] a time of resuming link measurement on the first reference signal resources and / or the third reference signal resources with a measured link quality equal to or lower than a threshold value;

[0052] a time interval between a time of resuming uplink transmission and a time of triggering reporting of link failure on the SBFD symbol;

[0053] a time interval between a time of resuming link measurement and a time of triggering reporting of link failure on the SBFD symbol.

[0054] In this implementation, after triggering reporting of link failure on the SBFD symbol, the terminal device resumes uplink transmission on the corresponding SBFD symbol, resumes link measurement on the SBFD symbol, and the like, according to the configuration of the network device in the configuration information, after a specified time, to maintain continuous and efficient use of the transmission resource corresponding to the SBFD symbol, and continuous understanding of the link quality condition on the SBFD symbol.

[0055] In some implementations of the first aspect or the second aspect, the measurement report is carried in a scheduling request (SR) or a medium access control-control element (MAC CE) message.

[0056] In a third aspect, a communication apparatus is provided, which has the function of implementing the method in the first aspect or any possible implementation of the first aspect; or has the function of implementing the method in the second aspect or any possible implementation of the second aspect. 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 functions.

[0057] Fourthly, a communication device is provided, comprising at least one processor configured to cause the communication device to execute the method of the first aspect or any possible implementation thereof; or to execute the method of the second aspect or any possible implementation thereof. Optionally, the at least one processor is coupled to at least one memory for storing computer programs or instructions, and the at least one processor is configured to call and run the computer program or instructions from the at least one memory, causing the communication device to execute the method of the first aspect or any possible implementation thereof; or to execute the method of the second aspect or any possible implementation thereof. Optionally, the at least one processor may be included in the communication device or may be configured outside 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, without limitation. The communication interface may also be an interface circuit.

[0058] Fifthly, 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 aspect or any possible implementation thereof; or to perform a method as described in the second aspect or any possible implementation thereof. Optionally, the communication interface is further configured to output a signal processed by the circuit. Optionally, the signal may include information and / or data. Optionally, the communication device may be a chip or a chip system.

[0059] A sixth aspect provides a computer-readable storage medium storing computer program code or instructions that, when executed on a computer, cause the method as described in the first aspect or any possible implementation thereof to be implemented; or, the method as described in the second aspect or any possible implementation thereof to be implemented.

[0060] In a seventh aspect, a computer program product is provided, the computer program product comprising computer program code or instructions, which, when executed on a computer, cause the method in the first aspect or any possible implementation thereof to be implemented; or, as in the second aspect or any possible implementation thereof, the method to be implemented.

[0061] Eighthly, a wireless communication system is provided, including a communication device as described in the first aspect and a communication device as described in the second aspect. Attached Figure Description

[0062] FIG. 1 is a schematic diagram of sub-band full duplex (SBFD).

[0063] FIG. 2 is a schematic diagram of a communication system suitable for embodiments of the application.

[0064] FIG. 3 is a schematic diagram of an ORAN system suitable for embodiments of the application.

[0065] FIG. 4 is a schematic flow chart of a communication method 200 provided by the application.

[0066] FIG. 5 is an example of a communication method provided by the application.

[0067] FIG. 6 is an example of a terminal device independently performing link monitoring on a CSI-RS resource on an SBFD symbol provided by the application.

[0068] FIG. 7 is a schematic structural diagram of a communication apparatus provided by the application.

[0069] FIG. 8 is a schematic structural diagram of another communication apparatus provided by the application.

[0070] FIG. 9 is a schematic structural diagram of a chip provided by the application.

[0071] FIG. 10 is a block diagram of an example of a hardware implementation for a baseband. DETAILED DESCRIPTION

[0072] The technical solutions in the application will be described below with reference to the accompanying drawings.

[0073] FIG. 1 is a schematic diagram of sub-band full duplex (SBFD). In the example of FIG. 1, one subcarrier is divided into three subbands, the middle subband is an uplink subband for uplink transmission, and the upper and lower subbands are downlink subbands for downlink transmission. It can be considered that in the SBFD scheme, on an SBFD symbol, the network device can implement simultaneous transmission and reception through different frequency domain resources (subbands). At present, it is decided in the standard to adopt "network device side sub-band full duplex, UE side half duplex". Network device side sub-band full duplex means that the network device can simultaneously transmit on the downlink subband and receive on the uplink subband on an SBFD symbol; UE side half duplex means that the UE can only receive or transmit on an SBFD symbol, and cannot simultaneously receive or transmit. Under the SBFD scheme, compared with the traditional TDD, the available uplink transmission resources of the UE are increased, which can effectively improve the uplink coverage and reduce the uplink delay.

[0074] If there is at least one DL subband and at least one UL subband in one time domain symbol, the symbol is called SBFD symbol; if all symbols in one slot are SBFD symbols, the slot is called SBFD slot. The TDD configuration of the 5 consecutive slots in FIG. 1 is DDDSU (representing that the 5 slots are DL slots (the first three slots), special slots and UL slots respectively), and the network device can configure the DL slots and the special slots as SBFD slots, for example, the second and third DL slots in FIG. 1 are configured as SBFD slots. Among them, the special slot is a slot in which there is a symbol that is not designated as DL or UL.

[0075] Radio link monitoring (RLM) or beam failure detection (BFD) are two physical layer procedures for link monitoring by the terminal device.

[0076] 1) RLM measurement

[0077] RLM measurement is a measurement performed by the terminal on the reference signal designated by the network to monitor the quality of the wireless link, and the current link quality is judged by the measurement result. If the reception performance of the physical downlink control channel (PDCCH) is lower than a certain threshold, as an example, measured by the block error rate (BLER), the terminal will record an out-of-sync (OOS) once. When the number of OOS exceeds a certain threshold, the terminal starts the T310 timer, and the expiration of the T310 timer will trigger the radio resource control (RRC) reestablishment. If the reception performance of the PDCCH under the current link quality is higher than a certain threshold, the terminal will record an in-sync (IS) once. Before the expiration of the timer T310, if the number of IS appears exceeds a certain threshold, the terminal considers that the link is recovered. If the network configures multiple reference signals for RLM measurement, the terminal records an OOS only when the link quality corresponding to all reference signals is below the threshold, and the terminal records an IS when the link quality corresponding to at least one reference signal is above the threshold.

[0078] 2) BFD measurement

[0079] BFD measurement is similar to RLM measurement, which is that the terminal measures on the reference signal designated by the network to monitor the quality of the current serving beam, and judges the reception performance of PDCCH under the current beam quality through the measurement result. If the reception performance is lower than a certain threshold, the terminal will record an OOS. When the number of OOS within a certain time length exceeds a certain threshold, it will trigger beam failure, and then trigger CBD measurement. If the network configures multiple reference signals for BFD measurement, the terminal will record an OOS only when the link quality of all reference signals is lower than the threshold. The configuration of BFD is indicated in the information element Radio Link Monitoring Configuration (RadioLinkMonitoringConfig), including channel state information-reference signal (CSI-RS) resources for link monitoring on SBFD symbols, and the number of times and timers related to the statistics of link failure events.

[0080] 3) Layer 1 (i.e., L1 level) beam measurement.

[0081] In NR, the terminal can perform beam measurement on the CSI-RS resource transmitted by the serving cell, and the terminal reports the measurement result to the network through L1 signaling. Generally, the network uses the measurement result to select the transmission beam in the serving cell for scheduling the terminal. The serving cell indicates the frequency domain position (e.g., bandwidth and starting RB), time domain position (e.g., period and offset), and other information of the CSI-RS resource to be measured in the measurement configuration. In addition, the resource configuration of the CSI-RS is associated with a reporting configuration (CSI-ReportConfig) to configure the measurement quantity, periodic reporting period, and whether to filter during measurement.

[0082] In L1 beam measurement, separate reporting for SBFD symbols and non-SBFD symbols is supported, which is configured through the reporting configuration (CSI-ReportConfig).

[0083] Although L1 beam measurement supports separate CSI reporting for SBFD symbols and non-SBFD symbols, periodic CSI reporting cannot fully reflect the link quality. For example, in order to reduce the overhead, the reporting period of periodic CSI may be large, which may cause the reporting to be not timely. For another example, the network side cannot distinguish between the case of link unavailability (e.g., unable to schedule) and the case of link quality degradation (e.g., can be conservative scheduling) through CSI. At this time, the CSI reporting for SBFD symbols cannot make the network side obtain the information of link failure occurring on SBFD symbols. Therefore, on the basis of supporting CSI reporting, RLM measurement or BFD measurement is also supported.

[0084] Considering that the interference on the SBFD symbol and the non-SBFD symbol is different in the cell enabling the SBFD feature, the network side can configure different antenna configurations for transmitting the CSI-RS on the SBFD symbol and the non-SBFD symbol, and the link quality on the SBFD symbol and the link quality on the non-SBFD symbol can be different, so the network side needs to know the respective link qualities on the SBFD symbol and the non-SBFD symbol.

[0085] As described above, the current separate CSI reporting for the SBFD symbol and the non-SBFD symbol cannot enable the network side to know the link failure information on the SBFD symbol. In addition, under the existing link monitoring mechanism, if only the SBFD symbol is monitored (for example, the CSI-RS resource for link monitoring only appears on the SBFD symbol), unnecessary link reestablishment or beam recovery processes can be caused, for example, the link quality on the non-SBFD symbol can still work at this time; if only the non-SBFD symbol is monitored (for example, the CSI-RS resource for link monitoring only appears on the non-SBFD symbol), the network side cannot perceive the link failure on the SBFD symbol; if the SBFD symbol and the non-SBFD symbol are monitored at the same time (for example, the CSI-RS resource for link monitoring appears on the SBFD symbol and the non-SBFD symbol), since the link failure or the beam failure is triggered when the reception performance, for example, the signal to interference plus noise ratio (SINR), on all resources is lower than a threshold, only the reception performance of the resource on the SBFD symbol is lower than the threshold and the link failure is not triggered, so the network side cannot perceive the link failure on the SBFD symbol.

[0086] Therefore, an embodiment of the present application provides a communication method, which aims to enable the network device to know the link failure on the SBFD symbol in time, while avoiding other adverse effects as much as possible, for example, unnecessary link reestablishment or beam recovery processes.

[0087] The technical solutions provided in the present application can be applied to various communication systems, for example, a 5th generation (5G) or new radio (NR) system, a long term evolution (LTE) system, an LTE frequency division duplex (FDD) system, an LTE time division duplex (TDD) system, a wireless local area network (WLAN) system, a satellite communication system, a future communication system, or a converged system of multiple systems, and the like. The technical solutions provided in the present application can also be applied to device to device (D2D) communication, vehicle-to-everything (V2X) communication, machine to machine (M2M) communication, machine type communication (MTC), and an internet of things (IoT) communication system or other communication systems.

[0088] FIG. 2 is a schematic diagram of a communication system applicable to the embodiments of the present application. A network element in the communication system 100 can send or receive a signal to or from another network element. The signal can include information, signaling, data, and the like. The network element can also be replaced by an entity, a network entity, a device, a communication device, a communication module, a node, a communication node, and the like. The embodiments of the present application are described by taking a device as an example. For example, the communication system can include a network device (for example, the network device 110) and at least one terminal device (for example, the terminal device 101 to the terminal device 106).

[0089] It should be noted that FIG. 2 is a simplified schematic diagram for ease of understanding. For example, the communication system 100 can further include other devices, such as a wireless relay device and / or a wireless backhaul device, which are not shown in FIG. 2. In actual applications, the communication system can include multiple network devices and multiple terminal devices. The number of network devices and terminal devices included in the communication system is not limited in the embodiments of the present application.

[0090] In the embodiments of the present application, the terminal device can also be referred to as a user equipment (UE), an access terminal, a user unit, a user station, a mobile station, a mobile station, a remote station, a remote terminal, a mobile device, a user terminal, a terminal, a wireless communication device, a user agent, or a user apparatus.

[0091] The terminal device can be a device providing voice / data, for example, a handheld device with wireless connection function, a vehicle-mounted device, etc. Currently, some examples of the terminal device can be a mobile phone, a tablet computer, a notebook computer, a palm computer, a mobile internet device (MID), a wearable device, a virtual reality (VR) device, an augmented reality (AR) device, a wireless terminal in industrial control, a wireless terminal in self driving, a wireless terminal in remote medical surgery, a wireless terminal in smart grid, a wireless terminal in transportation safety, a wireless terminal in smart city, a wireless terminal in smart home, a cellular phone, a cordless phone, a session initiation protocol (SIP) phone, a wireless local loop (WLL) station, a personal digital assistant (PDA), a handheld device with wireless communication function, a computing device or other processing device connected to a wireless modem, a wearable device, a terminal device in a 5G network, or a terminal device in a future evolved public land mobile network (PLMN), etc.

[0092] In the embodiments of the present application, the apparatus for implementing the function of the terminal device can be the terminal device, or can be an apparatus capable of supporting the terminal device to implement the corresponding function, for example, a chip, a chip system, a hardware circuit, a software module, or a combination of hardware circuit and software module. The apparatus can be configured in the terminal device, or used in matching with the terminal device. The chip system can be composed of a chip, or can include a chip and other discrete devices. In the embodiments of the present application, only the apparatus for implementing the function of the terminal device is taken as an example for description.

[0093] The network device in the embodiments of the present application can include a device for communicating with a terminal device, and the network device can include an access network device or a radio access network device, for example, the network device can be a base station. The access network device in the embodiments of the present application can refer to a radio access network (RAN) node (or device) that accesses a terminal device to a wireless network. The base station can broadly cover the following various names, or be replaced by the following names, for example: Node B (NodeB), evolved Node B (eNB), next generation Node B (gNB), relay station, access point, transmitting and receiving point (TRP), transmitting point (TP), primary station, secondary station, motor slide retainer (MSR) node, home base station, network controller, access node, wireless node, access point (AP), transmission node, transceiver node, baseband unit (BBU), remote radio unit (RRU), active antenna unit (AAU), remote radio head (RRH), central unit (CU), distributed unit (DU), radio unit (RU), positioning node, etc. The base station can be a macro base station, a micro base station, a relay node, a donor node or a combination thereof. The base station can also refer to a communication module, modem or chip used in the aforementioned device or apparatus. The base station can also be a mobile switching center and a device that performs the function of a base station in D2D, V2X, M2M communication, a network side device in future communication network, a device that performs the function of a base station in future communication system, etc. The base station can support networks of the same or different access technologies. Optionally, the RAN node can also be a server, a wearable device, a vehicle or a vehicle-mounted device, etc. For example, the access network device in vehicle to everything (V2X) technology can be a road side unit (RSU). The embodiments of the present application do not limit the specific technology and specific device form of the network device.

[0094] The base station can be fixed or mobile. For example, a helicopter or a drone can be configured to act as a mobile base station, and one or more cells can move according to the location of the mobile base station. In other examples, the helicopter or the drone can be configured to serve as a device that communicates with another base station.

[0095] In some deployments, the network device of embodiments of the present application can be a device including a CU, or a DU, or a device including a CU and a DU, or a control plane CU node (central unit-control plane (CU-CP)) and a user plane CU node (central unit-user plane (CU-UP)) and a DU node. For example, the network device can include a gNB-CU-CP, a gNB-CU-UP and a gNB-DU.

[0096] In some deployments, wireless access is assisted for a terminal by multiple RAN nodes cooperating, and different RAN nodes respectively implement part of the functions of a base station. For example, the RAN node can be a CU, a DU, a CU-CP, a CU-UP, or an RU, etc. The CU and the DU can be separately arranged, or can also be included in the same network element, for example, in a BBU. The RU can be included in a radio frequency device or a radio frequency unit, for example, included in an RRU, an AAU or an RRH.

[0097] In different systems, the CU (or CU-CP and CU-UP), DU or RU can also have different names, but those skilled in the art can understand their meanings. For example, in an open radio access network (open RAN, ORAN / O-RAN) system, the CU can also be referred to as an open CU (O-CU), and the DU can also be referred to as an open DU (O-DU). The CU-CP can also be referred to as an O-CU-CP, the CU-UP can also be referred to as an O-CU-UP, and the RU can also be referred to as an O-RU. Any one of the CU (or CU-CP, CU-UP), DU and RU in the present application can be implemented by a software module, a hardware module, or a combination of a software module and a hardware module.

[0098] In embodiments of the present application, the apparatus for implementing the functions of the network device can be a network device; it can also be an apparatus capable of supporting the network device to implement the corresponding functions, such as a chip system, a hardware circuit, a software module, or a combination of a hardware circuit and a software module. The apparatus can be configured in the network device or used in combination with the network device. In embodiments of the present application, only the apparatus for implementing the functions of the network device is taken as an example for explanation, and the scheme of embodiments of the present application is not limited.

[0099] Figure 3 is a schematic diagram of an O-RAN system suitable for embodiments of the application. The O-RAN system can comprise other components than those shown in Figure 3. As shown in Figure 3, an access network device (RAN, which can be an eNB or gNB or an access network device in a future communication system) communicates with a core network (CN) over a backhaul link and communicates with a UE over an air interface.

[0100] As an example, a baseband unit (BBU) in an access network device communicates with a core network through a backhaul. A radio unit (RU) in the access network device communicates with at least one UE through an air interface. The BBU communicates with at least one RU through a fronthaul, and the BBU and the RU can or can not be co-located. The BBU includes at least one control unit (CU) and at least one distributed unit (DU), which can communicate through at least one midhaul. In some examples, the DU is a logical node that carries one or more of a radio link control (RLC) layer, a medium access control (MAC) layer, a higher physical layer (Higher PHY) (which can refer to higher layer functions of the physical layer), and other functions. In some examples, the DU can control at least one RU. The DU is connected to the RU through some interfaces, which can be fronthaul interfaces. In some examples, the RU is a logical node that carries a lower physical layer (Lower PHY) (which can refer to lower layer functions of the physical layer) and radio frequency (RF) processing. In some examples, the RU can be a transmission reception point (TRP) or a remote radio head (RRH) or other similar functional entity. In some examples, the RU communicates with one or more UEs through a wireless link. The DU and the RU can or can not be co-located. The DU and the RU can cooperate to collectively implement the functions of the PHY layer. One DU can be connected to one or more RUs. The functions of the DU and the RU can be configured in multiple ways according to design. For example, the DU is configured to implement baseband functions, and the RU is configured to implement mid-radio functions. For another example, the DU is configured to implement higher layer functions in the PHY layer, and the RU is configured to implement lower layer functions in the PHY layer or to implement the lower layer functions and radio frequency functions. The higher layer functions in the PHY layer can include a portion of the functions of the physical layer that are closer to the MAC layer, and the lower layer functions in the PHY layer can include another portion of the functions of the physical layer that are closer to the mid-radio side.

[0101] The communication method provided in the present application is described in detail below.

[0102] FIG. 4 is a schematic flowchart of a communication method 200 provided by the present application. The communication method 200 can be performed by a first device, which can be a communication device or a device (such as a chip, a chip system, a processor, a circuit, or a combination of software and hardware module) for a communication device. As an example, the communication device can be a terminal device. Optionally, the method 200 can also include a second device. Similarly, the second device can be a communication device or a device (such as a chip, a chip system, a processor, a circuit, or a combination of software and hardware module) for a communication device. As an example, the communication device corresponding to the second device can be a network device. The following is described by taking a terminal device (an example of the first device) and a network device (an example of the second device) as an example.

[0103] 210. The terminal device performs link measurement.

[0104] The link measurement includes link measurement on a first reference signal resource and link measurement on a second reference signal resource, a transmission occasion of the first reference signal resource is located on an SBFD symbol, and a transmission occasion of the second reference signal resource is located on a non-SBFD symbol; and / or the link measurement includes link measurement on a first transmission occasion and link measurement on a second transmission occasion on a third reference signal resource, the first transmission occasion is located on an SBFD symbol, and the second transmission occasion is located on a non-SBFD symbol.

[0105] In the embodiments of the present application, the network device can configure different reference signal resources for link measurement on SBFD symbols and non-SBFD symbols. For example, the network device configures a first reference signal resource, a transmission occasion of the first reference signal resource is located on an SBFD symbol, and the first reference signal resource is used for link measurement on the SBFD symbol. The network device configures a second reference signal resource, a transmission occasion of the second reference signal resource is located on a non-SBFD symbol, and the second reference signal resource is used for link measurement on the non-SBFD symbol. Alternatively, the network device configures a same reference signal resource (for example, a third reference signal resource), a part of transmission occasions of the third reference signal resource are located on SBFD symbols, and the third reference signal resource is used for link measurement on the SBFD symbols. Another part of transmission occasions of the third reference signal resource are located on non-SBFD symbols, and the third reference signal resource is used for link measurement on the non-SBFD symbols.

[0106] It should be noted that in the technical solutions of the present application, the network device configures the terminal device to perform link measurement on SBFD symbols and non-SBFD symbols respectively, which can mean that when the reference signal resource configured by the network device for link measurement contains part located in the SBFD symbol, the reference signal resource located in the SBFD symbol is used for link measurement of the SBFD symbol, and whether the terminal device triggers the measurement report of the link failure on the SBFD symbol is only related to the link measurement on the part of the reference signal resource used for link measurement of the SBFD symbol, and is irrelevant to the result of the link measurement on the reference signal resource used for link measurement on the non-SBFD symbol. As an example, if the reference signal resource configured by the network device is all located in the SBFD symbol, the terminal device performs link measurement on the SBFD symbol on these reference signal resources, and reports the measurement report related to the link measurement on the SBFD symbol; if the reference signal resource configured by the network device is all located in the non-SBFD symbol, the terminal device performs link measurement on the non-SBFD symbol on these reference signal resources, and reports the measurement report related to the link measurement on the non-SBFD symbol. However, in the two configurations, the terminal device actually only performs link measurement and reporting on the SBFD symbol or the non-SBFD symbol (i.e., the terminal device only performs link measurement on one type of symbol). It can be understood that if the terminal device only performs link measurement and link failure reporting on the SBFD symbol, the network device can know the link failure on the SBFD symbol, but as described above, the network side can only know the link quality on the SBFD symbol, and cannot know the link quality on the non-SBFD symbol, which may lead to unnecessary link reconstruction or beam recovery process; if the terminal device only performs link measurement and measurement report on the non-SBFD symbol, the network device cannot know the link failure on the SBFD symbol. Therefore, the embodiments of the present application do not focus on the two configurations.

[0107] The following embodiments of the present application mainly relate to the case where the network device simultaneously configures reference signal resources for link measurement of SBFD symbols and reference signal resources for link measurement of non-SBFD symbols. In these embodiments, the terminal device independently performs link measurement and link failure reporting on the SBFD symbol, which means that the link failure reporting on the SBFD symbol is only related to the link measurement on the reference signal resource used for link measurement of the SBFD symbol.

[0108] For the third reference signal resource with some transmission occasions on the SBFD symbol and some transmission occasions on the non-SBFD symbol, the terminal device determines the link monitoring time according to the time interval or the number of transmission occasions in which the third reference signal resource appears on the SBFD symbol. The link monitoring time is the time for the terminal device to complete the link measurement. For the third reference signal resource, the terminal device only uses the transmission occasions on the SBFD symbol to perform link measurement on the SBFD symbol, so the measurement time will be increased compared to the case where all transmission occasions can be used.

[0109] 220. The terminal device sends a measurement report based on the link measurement on the SBFD symbol, and the measurement report is used to indicate the link failure on the SBFD symbol.

[0110] The terminal device sends a measurement report based on the link measurement on the SBFD symbol in a case where it is determined that the link failure on the SBFD symbol occurs. In other words, the measurement report is triggered based on the link failure on the SBFD symbol, and the link failure on the SBFD symbol is determined according to the link measurement on the SBFD symbol.

[0111] It should be noted that in the embodiments of the present application, the "link failure on the SBFD symbol" generally refers to the link failure occurring on the "SBFD symbol", and is relative to the "link failure on the non-SBFD symbol", so the "SBFD symbol" does not refer to a certain or certain specific SBFD symbol included in the reference signal resource configured by the network device. Similarly, the "link measurement on the SBFD symbol" also generally refers to the link measurement on the "SBFD symbol", and is relative to the "link measurement on the non-SBFD symbol". It can be seen that the "link failure on the SBFD symbol" refers to the link failure on the symbol of the type "SBFD", and the "link measurement on the SBFD symbol" also refers to the link measurement on the symbol of the type "SBFD".

[0112] Correspondingly, the network device receives the measurement report from the terminal device.

[0113] As an example, in an implementation manner, the measurement report can be carried in a scheduling request (SR) or a medium access control-control element (MAC CE) message or other uplink message, without limitation.

[0114] Optionally, the method 200 further includes step 230. As an example, step 230 can be located before step 210 or before step 220, without limitation.

[0115] ​230. The terminal device receives a first message from the network device, the first message comprising configuration information for indicating link measurement on the SBFD symbol.

[0116] As an example, the configuration information comprises a first configuration, the first configuration being used for indicating: the first reference signal resource and / or the third reference signal resource.

[0117] It should be understood that, in step 210, when the network device configures the first reference signal resource, the first configuration is used for indicating the first reference signal resource; when the network device configures the third reference signal resource, the first configuration is used for indicating the third reference signal resource; when the network device configures the first reference signal resource and the third reference signal resource, the first configuration is used for indicating the first reference signal resource and the third reference signal resource.

[0118] As an example, the configuration information further comprises a second configuration, the second configuration comprising one or more of the following:

[0119] a decision condition for determining triggering of the link failure event;

[0120] a threshold of a number of link failure events associated with the link failure on the SBFD symbol;

[0121] a timer associated with the link failure on the SBFD symbol;

[0122] a resource for sending the measurement report;

[0123] a threshold of a reception performance for determining triggering of the link failure event.

[0124] In the embodiments of the present application, the link failure event can be triggered when the terminal device measures the link quality on the reference signal resource for link measurement on the SBFD symbol to be equal to or lower than a threshold value, for example, the terminal device can send an out-of-sync indication (OCC) to the high layer of the terminal device when the terminal device monitors the link quality on the reference signal resource for link measurement on the SBFD symbol to be lower than or equal to a threshold value. One out-of-sync indication is one link failure event. When the high layer of the terminal device receives the indication of the link failure event reaching the threshold value for several times within a period of time (for example, the length of the timer) during the link measurement on the SBFD symbol, the link failure on the SBFD symbol is triggered. At this time, the terminal device can trigger the reporting of the link failure on the SBFD symbol. Specifically, the terminal device sends a measurement report to the network device to indicate the link failure on the SBFD symbol. For link measurement on the SBFD symbol, one or more link failure events can trigger one link failure on the SBFD symbol. The network device can indicate the information of the threshold value of the number of link failure events associated with the link failure on the SBFD symbol and / or the timer in the second configuration. In addition, the second configuration can also include one or more of the following: the resource for sending the measurement report, the threshold value of the receiving performance for determining whether to trigger the link failure event, and the decision condition for determining whether to trigger the link failure event. When some information items are not indicated in the second configuration, these information items can be pre-configured or default-configured or indicated by other means, which are not limited.

[0125] In this example, the network device implicitly indicates the related configuration of the terminal device for link measurement on the SBFD symbol through the first configuration and the second configuration in the first message.

[0126] The terminal device determines whether to perform link measurement on the SBFD symbol according to the configuration information contained in the first message during the link measurement on the SBFD symbol, and triggers the reporting of the link failure on the SBFD symbol in the case of determining that the link failure on the SBFD symbol occurs.

[0127] In an implementation, the first message comprises a first information element, the first information element being used to indicate configuration information of the link measurement on the SBFD symbol. The first information element can be specially designed for the link measurement on the SBFD symbol, where the configuration information of the link measurement on the SBFD symbol by the terminal device is carried. As an example, the first information element can be denoted as a Radio Link Monitoring Config-SBFD information element. The first configuration and the second configuration described above can be carried in the Radio Link Monitoring Config-SBFD. In this implementation, the network device explicitly indicates the related configuration of the terminal device for the link measurement on the SBFD symbol through the first information element of the first message.

[0128] In another implementation, the first message includes the first information, which is used to instruct the terminal device to perform the link measurement on the SBFD symbol. The first message can further include a second information element, which is used to indicate the configuration information of the link measurement on the non-SBFD symbol. As an example, the existing RadioLinkMonitoringConfig information element is used to instruct the terminal device to perform the link measurement on the non-SBFD symbol. The terminal device performs the link measurement on the non-SBFD symbol according to the configuration in the RadioLinkMonitoringConfig information element. In the embodiments of the present application, the RadioLinkMonitoringConfig information element can be taken as an example of the second information element. In a possible implementation, the first information can be included in the RadioLinkMonitoringConfig information element. Thus, the terminal device can have the following implementation: in one implementation, the terminal device obtains the first information in the first message, and performs the link measurement on the SBFD symbol and reports the corresponding link failure according to the first information. The terminal device obtains the related configuration of the link measurement on the SBFD symbol from the first configuration and the second configuration included in the first message. In this implementation, the network device explicitly instructs the terminal device to perform the link measurement on the SBFD symbol through the first information in the first message. As a specific example, the first information can be included in the second information element of the first message, which can be the RadioLinkMonitoringConfig information element or other information element in the first message. In another implementation, the terminal device obtains the first configuration in the first message, obtains the configuration of the reference signal resource for the link measurement on the SBFD symbol, and obtains the resource for sending the measurement report for indicating the link failure on the SBFD symbol. In addition, other configurations for the link measurement on the SBFD symbol can be obtained from the second information element of the first message, which can be the RadioLinkMonitoringConfig information element. The RadioLinkMonitoringConfig information element is used to indicate the related configuration of the link measurement on the non-SBFD symbol, which can include the configuration of the reference signal resource for the link measurement on the non-SBFD symbol, the resource for sending the measurement report corresponding to the link measurement on the non-SBFD symbol, and other related configurations. The other related configurations for the link measurement on the non-SBFD symbol can include one or more of the following information: the decision condition for determining the triggering of the link failure event, the threshold of the number of the link failure events associated with the link failure on the non-SBFD symbol, the timer associated with the link failure on the non-SBFD symbol, and the threshold of the reception performance for determining the triggering of the link failure event.For the sake of simplicity of description, if other related configurations for link measurement on non-SBFD symbols are referred to as third configurations, the terminal device can obtain other configurations for link measurement on SBFD symbols from the third configurations of the second information element. In other words, in this implementation, other configurations in the RadioLinkMonitoringConfig information element except for the configuration of reference signal resources for link measurement on non-SBFD symbols and the resource for sending a measurement report corresponding to link measurement on non-SBFD symbols are multiplexed for link measurement on SBFD symbols and link measurement on non-SBFD symbols.

[0129] As described above, the second configuration included in the configuration information of link measurement on SBFD symbols can include a decision condition for determining a trigger of a link failure event. As an example, the decision condition can include: triggering a link failure event on SBFD symbols in a case where the link quality on SBFD symbols measured on all first reference signal resources and / or all third reference signal resources is equal to or lower than a threshold; or triggering a link failure event on SBFD symbols in a case where the link quality on SBFD symbols measured on at least one first reference signal resource or at least one third reference signal resource is equal to or lower than a threshold. It can be understood that the former implementation is equivalent to defining the decision condition for triggering a link failure event as: measuring the link quality equal to or lower than the threshold on all reference signal resources for link measurement on SBFD symbols (for the sake of description, denoted as decision condition 1); and the latter implementation is equivalent to defining the decision condition for triggering a link failure event as: measuring the link quality equal to or lower than the threshold on at least one reference signal resource for link measurement on SBFD symbols (denoted as decision condition 2).

[0130] In combination with the step 210, in one implementation, the network side configures a first reference signal resource for link measurement on the SBFD symbol, and configures a second reference signal resource for link measurement on the non-SBFD symbol; at this time, the decision condition 1 is specifically used to indicate that the link quality on the SBFD symbol measured on all the first reference signal resources is equal to or lower than a threshold value, and then the link failure event on the SBFD symbol is triggered. In another implementation, the network side configures a third reference signal resource for link measurement; at this time, the decision condition 1 is specifically used to indicate that the link quality on the SBFD symbol measured on the third reference signal resource corresponding to all the first transmission occasions is equal to or lower than a threshold value, and then the link failure event on the SBFD symbol is triggered. In still another implementation, the network device configures the first reference signal resource, the second reference signal resource and the third reference signal resource; at this time, the decision condition 1 is specifically used to indicate that the link quality on the SBFD symbol measured on all the first reference signal resources is equal to or lower than a threshold value, and the link quality on the SBFD symbol measured on the third reference signal resource corresponding to all the first transmission occasions is equal to or lower than a threshold value, and then the link failure event on the SBFD symbol is triggered.

[0131] In one implementation, the network side configures a first reference signal resource for link measurement on the SBFD symbol, and configures a second reference signal resource for link measurement on the non-SBFD symbol; at this time, the decision condition 2 is specifically used to indicate that the link quality on the SBFD symbol measured on at least one first reference signal resource is equal to or lower than a threshold value, and then the link failure event on the SBFD symbol is triggered. In another implementation, the network side configures a third reference signal resource for link measurement; at this time, the decision condition 2 is specifically used to indicate that the link quality on the SBFD symbol measured on at least one third reference signal resource corresponding to the first transmission occasion is equal to or lower than a threshold value, and then the link failure event on the SBFD symbol is triggered. In still another implementation, the network device configures the first reference signal resource, the second reference signal resource and the third reference signal resource; at this time, the decision condition 2 is specifically used to indicate that the link quality on the SBFD symbol measured on at least one first reference signal resource is equal to or lower than a threshold value, or the link quality on the SBFD symbol measured on at least one third reference signal resource corresponding to the first transmission occasion is equal to or lower than a threshold value, and then the link failure event on the SBFD symbol is triggered.

[0132] Optionally, the threshold value for judging whether to trigger the link failure event can be indicated in the configuration information, for example, a threshold value of the reception performance in the configuration information, or the threshold value can be previously agreed by the network device and the terminal device or configured by default, without limitation.

[0133] The terminal device determines whether to trigger reporting of the link failure on the SBFD symbol according to the configuration information and the link measurement. In the case of triggering the reporting of the link failure, the terminal device sends a measurement report to the network device to indicate the link failure on the SBFD symbol, so that the network device can learn the link failure on the SBFD symbol in time.

[0134] For example, if the decision condition for determining whether to trigger the link failure event on the SBFD symbol is that the link quality on the SBFD symbol measured on at least one first reference signal resource or at least one third reference signal resource is equal to or lower than a threshold, the decision condition is the above-described decision condition 2, when the terminal device measures the link quality on the SBFD symbol on at least one first reference signal resource or at least one third reference signal resource to be equal to or lower than the threshold, the terminal device can carry first indication information in the measurement report, the first indication information being used to indicate the first reference signal resource and / or the third reference signal resource on which the link quality equal to or lower than the threshold is measured. Specifically, in combination with the above-described step 210, if the network device configures the first reference signal resource for the link measurement of the SBFD symbol, the first indication information is used to indicate the first reference signal resource on which the link quality equal to or lower than the threshold is measured, for example, the index of the first reference signal resource; if the network device configures the third reference signal resource and the first transmission occasion of the third reference signal resource is located on the SBFD symbol, the first indication information is used to indicate the third reference signal resource on which the link quality equal to or lower than the threshold is measured, for example, the index of the first reference signal resource; or, if the network device configures the first reference signal resource and the third reference signal resource, and the first transmission occasion of the third reference signal resource is located on the SBFD symbol, the first indication information is used to indicate the first reference signal resource and the third reference signal resource on which the link quality equal to or lower than the threshold is measured, for example, the index of the first reference signal resource and the third reference signal resource.

[0135] For example, if the decision condition for determining whether to trigger the link failure event on the SBFD symbol is that the link quality on the SBFD symbol measured on all first reference signal resources and / or all third reference signal resources is equal to or lower than a threshold, the decision condition is the above-described decision condition 1, the terminal device sending the measurement report itself indicates that the link quality on the SBFD symbol measured on each first reference signal resource and / or each third reference signal resource is equal to or lower than the threshold.

[0136] Optionally, when configuring the configuration information for the link measurement on the SBFD symbols, the network device considers the symmetry of the interference, and when the link quality on the SBFD symbols is equal to or lower than the threshold, triggering the case of link failure, the network device can instruct the terminal device to stop the corresponding uplink transmission (or in other words, sending the uplink signal). Thus, as an example, the configuration information can also include second indication information, the second indication information being used to indicate any one of the following:

[0137] After triggering the report of the link failure on the SBFD symbols, the uplink signal is sent on all SBFD symbols;

[0138] After triggering the report of the link failure on the SBFD symbols, the uplink signal is not sent on all SBFD symbols;

[0139] After triggering the report of the link failure on the SBFD symbols, the uplink signal is sent on the first SBFD symbol corresponding to the first reference signal resource and / or the third reference signal resource on which the link quality is equal to or lower than the threshold; or

[0140] After triggering the report of the link failure on the SBFD symbols, the uplink signal is not sent on the first SBFD symbol corresponding to the first reference signal resource and / or the third reference signal resource on which the link quality is equal to or lower than the threshold.

[0141] After triggering the report of the link failure on the SBFD symbols, the terminal device sends or does not send the uplink signal on the SBFD symbols, or sends or does not send the uplink signal on the first SBFD, which can depend on the configuration of the network device. Specifically, the terminal device determines according to the second indication information.

[0142] In addition, after the terminal device triggers the link failure on the SBFD symbols, the terminal device can also stop the link measurement on the SBFD symbols.

[0143] As an example, in some implementations, if the link failure is triggered in the case of satisfying the decision condition 1, the terminal device stops the link measurement on all SBFD symbols (for example, which can include all SBFD symbols corresponding to the first reference signal resource and / or all SBFD symbols corresponding to the third reference signal resource) after triggering the link failure on the SBFD symbols; in some implementations, if the link failure is triggered in the case of satisfying the decision condition 2, the terminal device can stop the link measurement on all SBFD symbols or stop the link measurement on the first SBFD symbol after triggering the link failure on the SBFD symbols.

[0144] Optionally, if the network device configures the terminal device to stop uplink transmission on all SBFD symbols or the first SBFD symbol after triggering link failure on the SBFD symbol, the network device can indicate in the configuration information a time for the terminal device to resume uplink transmission on all SBFD symbols or the first SBFD symbol. Optionally, as an example, the network device can also indicate in the configuration information a time for the terminal device to resume link measurement on the SBFD symbol; or the network device can also indicate in the configuration information a time interval between the time for the terminal device to trigger link failure on the SBFD symbol and the time for the terminal device to resume link measurement on the SBFD symbol.

[0145] Optionally, as an example, the time interval can also represent:

[0146] a time interval between the time for the terminal device to trigger link failure on the SBFD symbol and the time for the terminal device to perform next link measurement on the SBFD symbol; or

[0147] a time interval between the time for the terminal device to trigger link failure on the SBFD symbol and the time for the terminal device to send the measurement report.

[0148] As an example, the time for the terminal device to trigger link failure on the SBFD symbol and the time for the terminal device to report triggering of link failure on the SBFD symbol can be the same time, without limitation.

[0149] Based on the above possible implementations of the terminal device triggering link failure on the SBFD symbol, as an example, the configuration information can include third indication information, the third indication information being used to indicate one or more of the following information:

[0150] whether the terminal device performs link measurement on the SBFD symbol again after triggering link failure on the SBFD symbol;

[0151] a time for the terminal device to resume uplink transmission on all SBFD symbols corresponding to all first reference signals and / or all SBFD symbols corresponding to all third reference signals;

[0152] a time for the terminal device to resume uplink transmission on the SBFD symbol corresponding to the first reference signal resource and / or the third reference signal resource on which the link quality is equal to or lower than the threshold;

[0153] a time for the terminal device to resume link measurement on all first reference signal resources and / or all third reference signal resources;

[0154] a time for the terminal device to resume link measurement on the first reference signal resource and / or the third reference signal resource on which the link quality is equal to or lower than the threshold;

[0155] a time interval between a time of resuming uplink transmission and a time of triggering the reporting of the link failure on the SBFD symbol;

[0156] a time interval between a time of resuming link measurement and a time of triggering the reporting of the link failure on the SBFD symbol.

[0157] Optionally, the method 200 can comprise step 240.

[0158] 240. Based on the measurement report, the network device can perform one or more of the following processing or operations:

[0159] avoiding scheduling DL transmission on the SBFD symbol;

[0160] avoiding scheduling UL transmission on the SBFD symbol; or

[0161] configuring CLI measurement and performing CLI cancellation based on the result of the CLI measurement.

[0162] After learning the link failure on the SBFD symbol, the network device can avoid scheduling DL transmission and / or UL transmission on the SBFD symbol with poor link quality through the above-mentioned operations or processing, which can avoid the waste of scheduling resources or transmission resources. In addition, configuring CLI measurement can help the terminal device to recover the link quality in time. Optionally, the network device can not schedule DL transmission and / or UL transmission on all SBFD symbols, or not schedule DL transmission and / or UL transmission on the SBFD symbol with measured link quality equal to or lower than a threshold.

[0163] In addition, the method 200 can further comprise step 250.

[0164] 250. Based on the link failure on the SBFD symbol, the terminal device can perform one or more of the following:

[0165] transmitting uplink signals on all SBFD symbols;

[0166] not transmitting uplink signals on all SBFD symbols;

[0167] transmitting uplink signals on the first SBFD symbol corresponding to the first reference signal resource and / or the third reference signal resource with measured link quality equal to or lower than a threshold;

[0168] not transmitting uplink signals on the first SBFD symbol corresponding to the first reference signal resource and / or the third reference signal resource with measured link quality equal to or lower than a threshold;

[0169] resuming link measurement on the SBFD symbol; or

[0170] resuming uplink transmission on the SBFD symbol.

[0171] According to the description in step 230, the terminal device can specifically transmit or not transmit the uplink signal on the corresponding SBFD symbol according to the second indication information in the first message, and / or resume the uplink transmission, resume the link measurement on the SBFD symbol, etc. according to the third indication information in the first message, details of which are indicated in the configuration of the second indication information and the third indication information, which will not be repeated here.

[0172] In the technical solution of the present application, the network device can configure the terminal device to perform link measurement on the SBFD symbol and the non-SBFD symbol respectively, and send the measurement report to the network device in the case of triggering the link failure of the SBFD symbol, so that the network device can timely know the link failure on the SBFD symbol. In the case that the periodic CSI cannot timely reflect the link failure on the SBFD symbol, the network device can be assisted to avoid the downlink transmission or the uplink transmission on the SBFD symbol, or the terminal device can be further triggered to perform cross link interference (CLI) measurement to help the terminal device to timely restore the link quality.

[0173] FIG. 5 is an example of the communication method provided by the present application.

[0174] 301. The network device sends configuration information of link monitoring on the SBFD symbol to the terminal device.

[0175] Optionally, step 301 can have various specific implementations.

[0176] 1) In an implementation, as an example, the network device indicates the configuration information of the link monitoring on the SBFD symbol in the first information element. The first information element can include one or more of the following information: CSI-RS resource for link monitoring (or link measurement) on the SBFD symbol, threshold for counting the number of link failure events related to the link failure on the SBFD symbol, timer for counting the link failure related to the link failure on the SBFD symbol, or threshold for judging the block error rate of the link failure event, etc. As an example, after the timer is started and before it expires, when the number of times that the link quality on the SBFD symbol is equal to or lower than the threshold reaches the threshold of the number of link failure events indicated in the configuration information, the link failure on the SBFD symbol can be triggered. The threshold in the above embodiment can use the block error rate as the measurement index, or other indexes can be used, which are not limited.

[0177] As an example, the first information element can be a dedicated information element configured for link monitoring of SBFD symbols, which can be denoted as RadioLinkMonitoringConfig-SBFD information element. The first information element can be an information element specially used to indicate the configuration information related to link monitoring on SBFD symbols, which can be a newly added information element.

[0178] As another example, the network device indicates the terminal device to perform link monitoring of SBFD symbols in an existing information element (denoted as RadioLinkMonitoringConfig information element) used to indicate the configuration information of wireless link monitoring. As an example, a first information (e.g., the first information is 1 bit) can be added in the RadioLinkMonitoringConfig information element, and the first information is used to instruct the terminal device to perform link monitoring on SBFD symbols. Alternatively, the first information is used to instruct the terminal device to perform independent link monitoring for SBFD symbols; the independent link monitoring can mean that when link failure is monitored on the reference signal resource used for link monitoring of SBFD symbols, the reporting of the measurement report can be directly triggered without considering the result of link monitoring on non-SBFD symbols.

[0179] The configuration information related to link measurement on SBFD symbols can refer to the related description in method 200, and will not be repeated here.

[0180] 2) In another implementation, the network device indicates that the CSI-RS resource on the SBFD symbol is used for RLM measurement or BFD measurement.

[0181] As an example, the network device configures at least one first reference signal resource (e.g., CSI-RS resource) that only appears on SBFD symbols for RLM measurement or BFD measurement; and / or, the network device configures at least one third reference signal resource for RLM measurement or BFD measurement, wherein part of the transmission occasions of the third reference signal resource are on SBFD symbols and the other part are on non-SBFD symbols. In this implementation, the first reference signal resource appearing on SBFD symbols and / or the third reference signal resource corresponding to the transmission occasions on SBFD symbols are used for link measurement on the SBFD symbols.

[0182] In contrast, the implementation 1) can be an implementation for the network device to explicitly instruct the UE to perform link measurement on SBFD symbols and link failure reporting, and the implementation 2) is an implementation for the network device to implicitly instruct the UE to perform link measurement on SBFD symbols and link failure reporting.

[0183] 302、The terminal device performs link monitoring on SBFD symbols.

[0184] The terminal device performs link monitoring on the corresponding CSI-RS resource based on the configuration information in step 301, and determines whether to trigger the reporting of the link failure on the SBFD symbol according to the configuration in the configuration information.

[0185] As an example, in step 301, if the network device indicates the RadioLinkMonitoringConfig-SBFD information element, the terminal device uses the dedicated parameters for link measurement of the SBFD symbol; or if the network device indicates the RadioLinkMonitoringConfig information element and contains the first information therein, the terminal device multiplexes the third configuration in the RadioLinkMonitoringConfig information element (see the description in step 230) to determine whether to trigger the link failure on the SBFD symbol and report it.

[0186] 303. After the terminal device monitors the link failure on the SBFD symbol, the terminal device triggers the reporting of the link failure on the SBFD symbol.

[0187] For specific implementation and optional implementation of steps 302-303, refer to the detailed description of the related steps in method 200, which will not be repeated here.

[0188] In an implementation manner, the terminal device can report the link failure through a scheduling request (SR) or a medium access control-control element (MAC CE) message.

[0189] As an example, the terminal device reports the link failure on the SBFD symbol through a mechanism similar to a link recovery request of SCell beam failure recovery (BFR).

[0190] After learning the link failure on the SBFD symbol, the network device can avoid scheduling of downlink transmission on the SBFD symbol, avoid scheduling of uplink transmission on the SBFD symbol, or configure CLI measurement to help the terminal device recover the link quality.

[0191] In addition, after reporting the link failure on the SBFD symbol, the terminal device can also perform corresponding operations and / or processing according to the indication in the configuration information, for example, it can send or not send an uplink signal on all SBFD symbols or the first SBFD symbol corresponding to the reference signal resource on which the link quality is equal to or less than the threshold, that is, stop the corresponding uplink transmission. In addition, the link measurement on the SBFD symbol can also be stopped. As an example, in step 301, if the network device configures the terminal device to resume the link monitoring and / or uplink transmission on the SBFD symbol again after a time interval, the terminal device resumes the link monitoring and / or uplink transmission on the SBFD symbol after the corresponding time interval.

[0192] Taking the structure of the RAN device shown in FIG. 3 as an example, the network device related processing in step 301 can be performed in the CU, DU, or RU. In the CU, it can be performed in the CU-CP, and the configuration information for link monitoring on the SBFD symbol can be RRC signaling. The CU-CP is a logical node carrying the RRC layer and the PDCP-C layer, and is used to implement the control plane function of the CU. The DU is a logical node carrying the radio link control RLC layer, the MAC layer, the Higher PHY, and other functions. In the present technical solution, the DU can perform RLC layer, MAC layer, Higher PHY layer, and other processing on the RRC signaling generated in the CU-CP. The RU is a logical node carrying the Lower PHY and RF processing. In the present technical solution, the RU can further perform Lower PHY and RF processing, and other processing on the RRC signaling generated in the CU-CP, and send the processed RRC signaling to the UE through the air interface. In step 303, the RU of the network device can receive the SR or MAC CE sent by the terminal device, and the DU can react according to the measurement report in the SR or MAC CE, including determining not to schedule the DL transmission and / or UL transmission on the SBFD symbol. In addition, the network device sending the CSI-RS can be performed in the DU and the RU. The DU can generate the CSI-RS, which is processed by the RU and then sent to the UE through the air interface.

[0193] FIG. 6 is an example of the terminal device provided in the present application independently performing link monitoring on the CSI-RS resource on the SBFD symbol. Four UL-DL switching periods are shown in FIG. 6, for example, which can be 5 ms, and each switching period includes 5 slots. As an example, the 5 slots in a switching period are DL slot, SBFD slot, SBFD slot, special slot (a symbol in the slot is not designated as DL or UL), and UL slot, respectively. It is assumed that the network device configures CSI-RS#1, CSI-RS#2, and CSI-RS#3 for link measurement (or link monitoring), wherein CSI-RS#1 is located on the DL slot, or in other words, on the non-SBFD symbol of the non-SBFD slot; and CSI-RS#2 and CSI-RS#3 are located on the SBFD slot, or in other words, on the SBFD symbol of the SBFD slot. According to the technical solution provided in the present application, the terminal device measures CSI-RS#1 to perform link monitoring on the non-SBFD symbol, and measures CSI-RS#2 and CSI-RS#3 to perform link monitoring on the SBFD symbol. When the link quality on the SBFD symbol monitored on CSI-RS#2 and / or CSI-RS#3 is equal to or lower than the threshold, the terminal device triggers a measurement report, which is used to indicate the link failure on the SBFD symbol. It can be understood that the triggering of the measurement report is only related to the link quality on the SBFD symbol monitored on CSI-RS#2 and CSI-RS#3, and is irrelevant to the link quality on the non-SBFD symbol monitored on CSI-RS#1, and the link quality on the non-SBFD symbol monitored on CSI-RS#2 and CSI-RS#3.

[0194] As can be seen, in the embodiment of the present application, the terminal device monitors the link quality and reports it separately for the SBFD symbol and the non-SBFD symbol. When the terminal device monitors the link failure on the SBFD symbol, it can trigger a measurement report to report the link failure on the SBFD symbol to the network device, so that the network device can timely learn the link failure on the SBFD symbol, and then perform processing or operation based on the link failure on the SBFD symbol, such as avoiding scheduling the downlink transmission on the SBFD symbol to avoid wasting the scheduling resource (because the link quality on the SBFD symbol is poor at this time, the terminal device is likely to fail to demodulate the DL control channel), or avoiding scheduling the uplink transmission on the SBFD symbol, or configuring the CLI measurement to help the terminal device recover the link quality, thereby improving the transmission performance.

[0195] The above is a detailed description of the communication method provided in the present application. The following introduces a communication device provided in the present application.

[0196] To implement the functions of the communication device (for example, a terminal device or a network device) in the embodiments of the present application, the communication device can implement the corresponding functions in the form of a hardware structure, a software module, or a hardware structure plus a software module.

[0197] FIG. 7 is a schematic structural diagram of a communication device provided in the present application. As shown in FIG. 7, the communication device 1000 includes a processing module 1001 and a communication module 1002. The communication device 1000 can be a communication device, or a device applied to a communication device and capable of implementing the corresponding functions of the communication device, for example, a chip, a chip system, or a circuit, etc. Illustratively, the communication device can be a terminal device or a network device in the method embodiments.

[0198] The communication module can also be a transceiver module, a transceiver, a transceiver, or a transceiver device, etc. The processing module can also be a processor, a processing board, a processing unit, or a processing device, etc. Optionally, the communication module is used to perform the sending operation or the receiving operation of the terminal device or the network device in any one of the method embodiments. The device in the communication module for implementing the receiving function can be regarded as a receiving unit, and the device in the communication module for implementing the sending function can be regarded as a sending unit, that is, the communication module includes the receiving unit and the sending unit. The processing module is used to perform the internal implementation related operation / process of the terminal device or the network device in any one of the method embodiments. The corresponding specific operation of each module can be found in the description of the method embodiments, and will not be described here.

[0199] In addition, optionally, the communication module and / or the processing module can be implemented by a virtual module, for example, the processing module can be implemented by a software function unit or a virtual device, and the communication module can be implemented by a software function or a virtual device. Alternatively, the processing module or the communication module can also be implemented by an entity device, for example, the communication device is implemented by a chip, for example, a system on chip (SoC), a hardware circuit, etc., and the communication module can be an input / output circuit and / or a communication interface, performing an input operation (corresponding to the aforementioned receiving operation) and an output operation (corresponding to the aforementioned sending operation); the processing module is an integrated circuit or a logic circuit, etc.

[0200] The division of the modules in the present application is illustrative, and is only a logical function division. In actual implementation, there can be another division mode. In addition, each functional module in each example of the present application can be integrated in one module, or can be physically separated, or two or more modules can be integrated in one module. The integrated module can be implemented in the form of hardware, or in the form of a software function module, or in the form of a hardware and software combined function module, without limitation.

[0201] Figure 8 is a schematic structural diagram of another communication apparatus provided in the present application. The communication apparatus 1100 can be used to implement the functions of any one of the communication devices (e.g., terminal device or network device) in the communication system described in the foregoing examples. The communication apparatus 1100 can include at least one processor 1110. Optionally, the processor 1110 (or processing apparatus) is coupled with a memory, which can be located within the communication apparatus, or the memory can be integrated with the processor, or the memory can also be located outside the communication apparatus. For example, the communication apparatus 1100 can further include at least one memory 1120. The memory 1120 stores computer programs, instructions or data necessary for implementing any one of the method embodiments described above; the processor 1110 can execute the computer programs, instructions or data stored in the memory 1120 to complete the corresponding functions of the terminal device or network device in any one of the embodiments described above.

[0202] Optionally, the communication apparatus 1100 can further include a communication interface 1130, and the communication apparatus 1100 can interact with other devices through the communication interface 1130. For example, the communication interface 1130 can be a transceiver, circuit, bus, module, pin or other type of communication interface. When the communication apparatus 1100 is a chip-type apparatus or circuit, the communication interface 1130 in the apparatus 1100 can also be an input / output circuit, which can input information (or receive information) and / or output information (or send information); the processor can be an integrated circuit or logic circuit, etc., and the processor can determine the output information according to the input information.

[0203] The coupling in the present application is an indirect coupling or communication connection between apparatuses, units or modules, which can be electrical, mechanical or other forms, for information interaction between apparatuses, units or modules. The processor 1110 can operate in cooperation with the memory 1120 and the communication interface 1130. The connection medium between the processor 1110, the memory 1120 and the communication interface 1130 is not limited in the present application.

[0204] Figure 9 is a schematic structural diagram of a chip provided in the present application. The chip 30 includes a circuit 31 and a communication interface 32. The circuit 31 can be a logic circuit, an integrated circuit, etc., and the communication interface 32 can also be referred to as an input / output circuit, an input / output interface, an interface circuit, etc., which can input information (or receive information) or output information (or send information). The chip 30 can execute the methods performed by the terminal device or network device in the embodiments of the present application.

[0205] FIG. 10 is a block diagram of an example of a hardware implementation for the baseband. As shown in FIG. 10, the baseband can be implemented with a processing system that includes one or more processors. Processors include microprocessors (e.g., X86, ARM), microcontrollers, digital signal processors (DSPs), field programmable gate arrays (FPGAs), graphics processing units (GPUs), programmable logic devices (PLDs), state machines, gated logic, discrete hardware circuits, and other suitable hardware configured to perform the various functionality described herein.

[0206] The processing system can be implemented with a bus architecture, represented generally by the bus 1002. The bus 1002 can include any number of interconnecting buses and bridges, depending on the specific application of the processing system and the overall design constraints. The bus 1002 communicatively couples various circuitry including one or more processors (as examples, when there are multiple processors, they can be represented as processor #1 through processor #N, where N is a positive integer greater than 1) and computer-readable media. The computer-readable media can be exemplary one or more memories. When there is more than one computer-readable medium, they can be represented as computer-readable medium #1 through computer-readable medium #M, where M is a positive integer greater than 1. As an example, the one or more computer-readable media can be one or more memories. The bus 1002 can also link various other circuitry, such as a timing source, peripherals, voltage regulators, and power management circuitry, which are well known in the art, and therefore, will not be further described. A bus interface provides an interface between the bus 1002 and a transceiver and between the bus 1002 and an interface.

[0207] The transceiver provides a communication interface or means for communicating with various other apparatus over a wireless transmission medium. The transceiver can be coupled to an antenna array, and the transceiver and antenna array can together function as a communication interface or means for communicating with a corresponding network type. At least one interface (e.g., network interface and / or user interface) provides a communication interface or means for communication over the internal bus or via an external transmission medium.

[0208] The processor is responsible for managing the bus and general processing, including the execution of software stored on the computer-readable media. The software, when executed by the processor, causes the processing system to perform the various functions described infra for any particular apparatus.

[0209] As an example, the functions that the processor and the memory and the computer-readable medium can implement can be encoding, decoding, rate matching, de-rate matching, scrambling, de-scrambling, modulation, demodulation, layer mapping, fast Fourier transform (FFT), inverse fast Fourier transform (IFFT), inverse discrete Fourier transform (IDFT), precoding, resource element (RE) mapping, channel equalization, de-RE mapping, digital beamforming, adding a cyclic prefix (CP), removing a CP, and the like.

[0210] The hardware implementation of the baseband can be used to implement the corresponding functions of the terminal device or the network device in the embodiments of the present application.

[0211] The processor can include communication and processing circuitry. The communication and processing circuitry can include one or more hardware components that provide a physical structure that performs various processes related to wireless communication (e.g., signal reception and / or signal transmission). The communication and processing circuitry can include two or more transmit / receive chains. The functions implemented by the communication and processing circuitry can also be processed on a computer-readable medium.

[0212] As an example, if the hardware implementation of the baseband is used to implement the functions of the terminal device, the processor can include functions for implementing the following: performing CSI-RS measurement, generating measurement results, determining whether a link failure event occurs on the CSI-RS resource according to the measurement results, and determining whether to trigger the reporting of the link failure on the SBFD symbol according to the configuration of the network device. If the hardware implementation of the baseband is used to implement the functions of the network device, the processor can include functions for implementing the following: generating configuration information for link measurement on the SBFD symbol, controlling or performing network-side processing and / or operations after receiving the measurement report, and the like. CSI-RS measurement, generating measurement results, determining whether a link failure event occurs on the CSI-RS resource according to the measurement results, and determining whether to trigger the reporting of the link failure on the SBFD symbol according to the configuration of the network device.

[0213] In addition, the present application also provides a computer-readable storage medium, the computer-readable storage medium stores computer instructions, when the computer instructions run on the computer, the operations and / or processes performed by the terminal device or the network device in the method embodiments of the present application are executed.

[0214] The application further provides a computer program product, which comprises computer program codes or instructions, and when the computer program codes or instructions are run on a computer, operations and / or processes performed by a terminal device or a network device in any of the method embodiments of the application are executed.

[0215] Further, the application further provides a chip, which comprises a processor. A memory for storing a computer program is arranged independently of the chip, and the processor is configured to execute the computer program stored in the memory, so that operations and / or processes performed by a terminal device or a network device in any of the method embodiments are executed. Further, the chip can further comprise a communication interface. The communication interface can be an input / output interface, an interface circuit or the like. Further, the chip can further comprise a memory.

[0216] The application provides a communication system, which comprises a terminal device and a network device in any of the method embodiments.

[0217] In the embodiments of the application, "indication" can include direct indication, indirect indication, explicit indication, and implicit indication. When it is described that certain indication information is used to indicate A, it can be understood that the indication information carries A, which can be direct indication of A or indirect indication of A. The indirect indication can mean that the indication information directly indicates B and a corresponding relationship between B and A, so as to achieve the purpose of indicating A through the indication information. The corresponding relationship between B and A can be pre-defined by a protocol, pre-stored, or obtained through configuration between network elements.

[0218] The processor in the embodiments of the application has signal processing capability and can be a general processor, a digital signal processor, an application specific integrated circuit, a field programmable gate array, or other programmable logic device, a discrete gate or transistor logic device, a discrete hardware component, and can implement or execute the disclosed methods, steps and logic block diagrams in the application. The general processor can be a microprocessor or any conventional processor. The steps of the method disclosed in the application can be directly embodied as execution completed by a hardware processor, or executed by a combination of hardware and software modules in the processor. The software module can be located in a random access memory, a flash memory, a read only memory, a programmable read only memory, an electrically erasable programmable read only memory, a register, or other mature storage medium in the art. The storage medium is located in the memory, and the processor reads information in the memory and combines the hardware to complete the steps of the above method.

[0219] In embodiments of the application, the memory can be volatile memory or nonvolatile memory, or can include both volatile and nonvolatile memory. In one embodiment, nonvolatile memory can be read-only memory (ROM), programmable ROM (PROM), erasable PROM (EPROM), electrically EPROM (EEPROM), or flash memory. Volatile memory can be random access memory (RAM), which acts as external cache. By way of example and not limitation, many forms of RAM are available, such as static RAM (SRAM), dynamic RAM (DRAM), synchronous DRAM (SDRAM), double data rate SDRAM (DDR SDRAM), enhanced SDRAM (ESDRAM), Synchlink DRAM (SLDRAM), and direct rambus RAM (DR RAM). It is to be noted that the memory described herein is intended to include, among other things, these and any other suitable types of memory.

[0220] Those skilled in the art can clearly understand that the units and algorithm steps of each example described in combination with the embodiments disclosed herein can be realized by electronic hardware or a combination of computer software and electronic hardware. Whether the functions are realized in hardware or software depends on the specific application and design constraints of the technical solution. A person skilled in the art can use different methods to realize the described functions for each specific application, but such implementation should not be considered beyond the scope of the present application.

[0221] Those skilled in the art can clearly understand that, for the convenience and brevity of the description, the specific working processes of the above-described system, device and unit can refer to the corresponding processes in the foregoing method embodiments, which will not be described here.

[0222] In several embodiments provided in the present application, it should be understood that the disclosed system, device and method can be implemented in other manners. For example, the described device embodiments are merely schematic. The division of the units is merely logical function division. There can be other division manners in actual implementation. For example, a plurality of units or components can be combined or integrated into another system, or some features can be ignored or not executed. In addition, the displayed or discussed mutual couplings or direct couplings or communication connections can be indirect couplings or communication connections through some interfaces, devices or units, and can be in electrical, mechanical or other forms.

[0223] The units described as separate components can or can not be physically separate, and the components shown as units can or can not be physical units, i.e., can be located in one place, or can be distributed on a plurality of network units. Some or all of the units can be selected according to actual needs to achieve the purpose of the embodiment.

[0224] In addition, each functional unit in the various embodiments of the present application can be integrated into a processing unit, or each unit can be a physically separate unit, or two or more units can be integrated into one unit.

[0225] If the functions are realized in the form of software function units and sold or used as independent products, they can be stored in a computer readable storage medium. Based on this understanding, the technical solutions of the present application can be embodied in the form of a software product, and the computer software product is stored in a storage medium, and includes a number of instructions for causing a computer device (which can be a personal computer, a server, or a network device, etc.) to execute all or part of the steps of the methods described in the various embodiments of the present application. The aforementioned storage medium includes: a U disk, a mobile hard disk, a read-only memory (ROM), a random access memory (RAM), a magnetic disk or an optical disk, and various media that can store program codes.

[0226] The above description is merely a specific implementation of the present application, but the protection scope of the present application is not limited thereto. Any person skilled in the art can easily think of changes or replacements within the technical scope disclosed in the present application, which should be covered within the protection scope of the present application. Therefore, the protection scope of the present application should be subject to the protection scope of the claims.

Claims

1. A communication method characterized by comprising: comprising: performing link measurement, wherein, the link measurement comprises link measurement on a first reference signal resource and link measurement on a second reference signal resource, a transmission occasion of the first reference signal resource is located on a SBFD symbol, a transmission occasion of the second reference signal resource is located on a non-SBFD symbol, and / or the link measurement comprises link measurement on a first transmission occasion and link measurement on a second transmission occasion of a third reference signal resource, the first transmission occasion is located on a SBFD symbol, the second transmission occasion is located on a non-SBFD symbol; sending a measurement report based on link measurement on a SBFD symbol, the measurement report is used to indicate link failure on the SBFD symbol, the link measurement on the SBFD symbol comprises link measurement on the first reference signal resource and / or link measurement on the first transmission occasion of the third reference signal resource.

2. The method of claim 1, wherein, the sending a measurement report based on link measurement on a SBFD symbol comprises: sending the measurement report in a case where it is determined that link failure on the SBFD symbol occurs based on the link measurement on the SBFD symbol.

3. The method according to claim 1 or 2, characterized in that, the method further comprises: receiving a first message, the first message contains configuration information used to indicate link measurement on the SBFD symbol, the configuration information comprises a first configuration, the first configuration is used to indicate: the first reference signal resource; and / or the third reference signal resource.

4. The method of claim 3, wherein, the configuration information further comprises a second configuration, the second configuration comprises one or more of the following information: a decision condition used to determine triggering of a link failure event; a threshold of a number of link failure events associated with link failure on the SBFD symbol; a timer associated with link failure on the SBFD symbol; a resource for sending the measurement report; a threshold of reception performance used to determine triggering of a link failure event.

5. The method according to claim 3 or 4, characterized in that, the first message comprises a first information element, the first information element is used to indicate configuration information of link measurement on the SBFD symbol.

6. The method of claim 3, wherein, the first message comprises first information, the first information is used to instruct the terminal device to perform link measurement on the SBFD symbol; the first message further comprises a second information element, the second information element is used to indicate configuration information of link measurement on a non-SBFD symbol.

7. The method according to any one of claims 4 to 6, characterized in that, the decision condition used to determine triggering of a link failure event comprises: triggering a link failure event on a SBFD symbol in a case where link quality on the SBFD symbol measured on all of the first reference signal resources and / or all of the third reference signal resources is equal to or lower than a threshold; or triggering a link failure event on a SBFD symbol in a case where link quality on the SBFD symbol measured on at least one of the first reference signal resources or at least one of the third reference signal resources is equal to or lower than a threshold.

8. The method of claim 7, wherein, In a case that a link quality on a SBFD symbol is equal to or lower than a threshold is measured on at least one of the first reference signal resource or at least one of the third reference signal resource, triggering a link failure event on the SBFD symbol, the measurement report includes first indication information, the first indication information is used to indicate the first reference signal resource and / or the third reference signal resource on which the link quality equal to or lower than the threshold is measured.

9. The method according to any one of claims 3 to 8, characterized in that, The configuration information further includes second indication information, the second indication information is used to indicate any one of the following: After triggering the report of the link failure on the SBFD symbol, sending uplink signals on all SBFD symbols; After triggering the report of the link failure on the SBFD symbol, not sending uplink signals on all SBFD symbols; After triggering the report of the link failure on the SBFD symbol, sending uplink signals on the first SBFD symbol corresponding to the first reference signal resource and / or the third reference signal resource on which the link quality equal to or lower than the threshold is measured; Or After triggering the report of the link failure on the SBFD symbol, not sending uplink signals on the first SBFD symbol corresponding to the first reference signal resource and / or the third reference signal resource on which the link quality equal to or lower than the threshold is measured.

10. The method according to any one of claims 3 to 9, characterized in that, The configuration information further includes third indication information, the third indication information includes one or more of the following information: Time for resuming uplink transmission on all SBFD symbols corresponding to the first reference signal and / or all SBFD symbols corresponding to the third reference signal resource; Time for resuming uplink transmission on the SBFD symbol corresponding to the first reference signal resource and / or the third reference signal on which the link quality equal to or lower than the threshold is measured; Time for resuming link measurement on all first reference signal resources and / or all third reference signal resources; Time for resuming link measurement on the first reference signal resource and / or the third reference signal resource on which the link quality equal to or lower than the threshold is measured; Time interval between the time for resuming uplink transmission and the time for triggering the report of the link failure on the SBFD symbol; Time interval between the time for resuming link measurement and the time for triggering the report of the link failure on the SBFD symbol.

11. A communication method, comprising: Comprise: Receiving a measurement report, the measurement report is used to indicate a link failure on a SBFD symbol, wherein, The link measurement includes link measurement on a first reference signal resource and link measurement on a second reference signal resource, the transmission occasion of the first reference signal resource is located on a SBFD symbol, and the transmission occasion of the second reference signal resource is located on a non-SBFD symbol, And / or The link measurement includes link measurement on a first transmission occasion on a third reference signal resource and link measurement on a second transmission occasion, the first transmission occasion is located on a SBFD symbol, and the second transmission occasion is located on a non-SBFD symbol; The measurement report is sent based on a link measurement on an SBFD symbol, the link measurement on the SBFD symbol including a link measurement on the first reference signal resource and / or a link measurement on the first transmission occasion of the third reference signal resource.

12. The method of claim 11, wherein, The measurement report is sent in a case where it is determined that a link failure on the SBFD symbol occurs, the link failure on the SBFD symbol being determined based on the link measurement on the SBFD symbol.

13. The method according to claim 11 or 12, characterized in that, The method further includes: sending, to a terminal device, a first message, the first message containing configuration information for indicating a link measurement on an SBFD symbol, the configuration information including a first configuration for indicating: the first reference signal resource; and / or the third reference signal resource.

14. The method of claim 13, wherein, The configuration information further includes a second configuration, the second configuration including one or more of the following: a decision condition for determining a triggering of a link failure event; a threshold of a number of link failure events associated with the link failure on the SBFD symbol; a timer associated with the link failure on the SBFD symbol; a resource for sending the measurement report; a threshold of a reception performance for determining a triggering of a link failure event.

15. The method according to claim 13 or 14, characterized in that, The first message includes a first information element for indicating the configuration information of the link measurement on the SBFD symbol.

16. The method of claim 13, wherein, The first message includes a first information for instructing the terminal device to perform the link measurement on the SBFD symbol. The first message further includes a second information element for indicating configuration information of a link measurement on a non-SBFD symbol.

17. The method according to any one of claims 14 to 16, characterized in that, The decision condition for determining a triggering of a link failure event includes: triggering a link failure event on an SBFD symbol in a case where a link quality on the SBFD symbol is equal to or lower than a threshold on all of the first reference signal resources and / or all of the third reference signal resources; or triggering a link failure event on an SBFD symbol in a case where a link quality on the SBFD symbol is equal to or lower than a threshold on at least one of the first reference signal resources or at least one of the third reference signal resources.

18. The method of claim 17, wherein, In a case where a link quality on the SBFD symbol is equal to or lower than a threshold on at least one of the first reference signal resources or at least one of the third reference signal resources, triggering the link failure event on the SBFD symbol, the measurement report contains first indication information for indicating the first reference signal resource and / or the third reference signal resource on which the link quality equal to or lower than the threshold is measured.

19. The method according to any one of claims 13 to 18, characterized in that, The configuration information further includes second indication information for indicating any one of the following: sending an uplink signal on all SBFD symbols after reporting the link failure on the SBFD symbol; not sending an uplink signal on all SBFD symbols after reporting the link failure on the SBFD symbol; after triggering the reporting of the link failure on the SBFD symbol, sending an uplink signal on the first SBFD symbol corresponding to the first reference signal resource and / or the third reference signal resource on which the link quality is measured to be equal to or lower than a threshold value; or after triggering the reporting of the link failure on the SBFD symbol, not sending an uplink signal on the first SBFD symbol corresponding to the first reference signal resource and / or the third reference signal resource on which the link quality is measured to be equal to or lower than a threshold value.

20. The method of any one of claims 13-19, wherein, The configuration information further includes third indication information, and the third indication information includes one or more of the following information: a time for resuming uplink transmission on all SBFD symbols corresponding to the first reference signal and / or all SBFD symbols corresponding to the third reference signal resource; a time for resuming uplink transmission on the SBFD symbol corresponding to the first reference signal resource and / or the third reference signal on which the link quality is measured to be equal to or lower than a threshold value; a time for resuming link measurement on all first reference signal resources and / or all third reference signal resources; a time for resuming link measurement on the first reference signal resource and / or the third reference signal resource on which the link quality is measured to be equal to or lower than a threshold value; a time interval between the time for resuming uplink transmission and the time for triggering the reporting of the link failure on the SBFD symbol; a time interval between the time for resuming link measurement and the time for triggering the reporting of the link failure on the SBFD symbol.

21. A communications device, characterized by comprising: a processing module configured to perform link measurement, wherein the link measurement includes link measurement on a first reference signal resource and link measurement on a second reference signal resource, a transmission occasion of the first reference signal resource being located on an SBFD symbol, a transmission occasion of the second reference signal resource being located on a non-SBFD symbol, and / or the link measurement includes link measurement on a first transmission occasion and link measurement on a second transmission occasion on a third reference signal resource, the first transmission occasion being located on an SBFD symbol, and the second transmission occasion being located on a non-SBFD symbol; a communication module configured to send a measurement report based on link measurement on an SBFD symbol, the measurement report being used to indicate a link failure on the SBFD symbol, the link measurement on the SBFD symbol including link measurement on the first reference signal resource and / or link measurement on the first transmission occasion of the third reference signal resource.

22. A communications device, characterized by comprising: The communication module is configured to receive a measurement report, the measurement report being used to indicate a link failure on a SBFD symbol; wherein the link measurement comprises a link measurement on a first reference signal resource and a link measurement on a second reference signal resource, a transmission occasion of the first reference signal resource being located on the SBFD symbol, a transmission occasion of the second reference signal resource being located on a non-SBFD symbol, and / or the link measurement comprises a link measurement on a first transmission occasion and a link measurement on a second transmission occasion on a third reference signal resource, the first transmission occasion being located on the SBFD symbol, the second transmission occasion being located on the non-SBFD symbol. The measurement report is transmitted based on a link measurement on a SBFD symbol, the link measurement on the SBFD symbol comprising a link measurement on the first reference signal resource and / or a link measurement on the first transmission occasion of the third reference signal resource.

23. A communications device, characterized by The apparatus comprises a module or unit for performing the method of any one of claims 1-10, or a module or unit for performing the method of any one of claims 11-20.

24. A communications device, characterized by The apparatus comprises at least one processor configured to execute computer programs or instructions stored in a memory, so that the method of any one of claims 1-10 is performed; or the method of any one of claims 11-20 is performed.

25. A chip, characterized by The apparatus comprises a circuit and a communication interface, the communication interface being configured to receive information and / or data to be processed, and transmit the information and / or data to be processed to the circuit; the circuit being configured to process the received information and / or data, so that the method of any one of claims 1-10 is performed; or the method of any one of claims 11-20 is performed.

26. A computer-readable storage medium, characterized in that, The computer readable storage medium stores computer programs or instructions, when the computer programs or instructions run on a communication device, the communication device performs the method of any one of claims 1-10; or the method of any one of claims 11-20.

27. A computer program product, characterised in that, The computer program product comprises computer programs or instructions for performing the method of any one of claims 1-10 or the method of any one of claims 11-20.

Images