Wireless communication method, device and system

Abstract

In an embodiment of the present invention, a wireless communication method, device, and system are provided, the method being applied to a terminal device, the terminal device being associated with at least two TRPs, the method including, after the terminal device receives first downlink control information associated with a beam failure or a link failure, monitoring second downlink control information based on an antenna port QCL parameter that is the same as an antenna port QCL parameter associated with a first reference signal, the first reference signal being associated with a first TRP of the at least two TRPs, the TRP associated with the second downlink control information and the first TRP associated with the first reference signal being the same, and the first reference signal being identified from at least one reference signal for beam recovery.

Description

[Technical field]

[0001] The present invention relates to the technical field of communications. [Background technology]

[0002] The central transmission frequency of the NR (New Radio) system has reached 52.6 GHz. When the central transmission frequency is high, the diffraction ability of high-frequency signals is low, and the channel corresponding to the link is easily blocked by obstacles, which may cause link failure.

[0003] In order to quickly recover the link, NR introduces beam failure recovery procedures (or link recovery procedures). These procedures can help terminal equipment and network equipment quickly switch from a blocked channel (poor quality) to an unblocked channel (good quality), thus improving link quality and reducing latency.

[0004] It should be noted that the introduction of the above background art is intended to clearly and completely explain the technical solutions of the present invention, and to facilitate understanding thereof by those skilled in the art, and these technical solutions are described in the background art of the present invention, and therefore should not be construed as being known to those skilled in the art. Summary of the Invention [Problem to be solved by the invention]

[0005] The inventor has found the following. That is, in terms of an NR communication system, there are usually multiple distributed transmission and reception points (TRPs) on the network side. Generally speaking, in order to increase throughput, a terminal device can communicate with two TRPs simultaneously. That is, the terminal device establishes links, for example, link #1 and link #2 shown in FIG. 1, with each TRP. In such a scenario, the channels corresponding to each link are prone to blockage by obstacles, especially when the central transmission frequency is relatively high, which may result in link failure (e.g., link #2). However, according to the current link recovery procedure, when a beam failure occurs in only one of the above two links, link recovery cannot be performed for a link of a specific TRP (the link where the beam failure occurs, for example, link #2 shown in FIG. 1). This may cause a decrease in link reliability and an increase in latency.

[0006] To solve the above problems or other similar problems, embodiments of the present invention provide a wireless communication method, apparatus and system, which enables an NR system to improve system reliability by performing a link recovery procedure for a TRP where a link failure occurs. [Means for solving the problem]

[0007] According to one aspect of an embodiment of the present invention, there is provided a wireless communication method for a terminal device, the terminal device being associated with at least two TRPs, the method comprising: After the terminal device receives first downlink control information associated with a beam failure or a link failure, the terminal device monitors second downlink control information based on an antenna port QCL parameter that is the same as an antenna port QCL parameter associated with a first reference signal; the first reference signal is associated with a first TRP of the at least two TRPs; The TRP associated with the second downlink control information and the first TRP associated with the first reference signal are the same, The first reference signal is identified from among at least one beam recovery reference signal.

[0008] According to another aspect of an embodiment of the present invention, there is provided a wireless communication method for a terminal device, the terminal device being associated with at least two TRPs, wherein the method includes: After the terminal device receives first downlink control information associated with a beam failure or a link failure, the terminal device transmits first uplink control information based on a spatial filter and / or power associated with a first reference signal; the first reference signal is associated with a first TRP of the at least two TRPs; The TRP associated with the first uplink control information and the first TRP associated with the first reference signal are the same, The first reference signal is identified from among at least one beam recovery reference signal.

[0009] According to one aspect of an embodiment of the present invention, there is provided a wireless communication device arranged in a terminal device, the terminal device being associated with at least two TRPs, among which the device comprises: A monitoring unit for monitoring second downlink control information based on an antenna port QCL parameter that is the same as an antenna port QCL parameter associated with a first reference signal after the terminal device receives first downlink control information associated with a beam failure or a link failure; the first reference signal is associated with a first TRP of the at least two TRPs; The TRP associated with the second downlink control information is the same as the first TRP associated with the first reference signal, The first reference signal is identified from among at least one beam recovery reference signal.

[0010] According to another aspect of an embodiment of the present invention, there is provided a wireless communication device disposed in a terminal device, the terminal device being associated with at least two TRPs, wherein the device comprises: A transmitting unit for transmitting first uplink control information based on a spatial filter and / or a power of a first reference signal after the terminal device receives first downlink control information associated with a beam failure or a link failure; the first reference signal is associated with a first TRP of the at least two TRPs; The TRP associated with the first uplink control information and the first TRP associated with the first reference signal are the same, The first reference signal is identified from among at least one beam recovery reference signal. Effect of the Invention

[0011] The advantageous effects of the embodiment of the present invention are as follows: on the one hand, by determining QCL parameters for monitoring PDCCH (second downlink control information) based on the TRP in which link recovery occurs, after link recovery associated with one TRP is successful, the terminal device can monitor the PDCCH using appropriate QCL parameters based on the relationship between the TRP and the PDCCH, thereby improving system reliability; on the other hand, by determining spatial filter and / or power control parameters for transmitting PUCCH (first uplink control information) based on the TRP in which link recovery occurs, after link recovery associated with one TRP is successful, the terminal device can transmit the PUCCH using appropriate spatial filter and / or power control parameters based on whether the PUCCH is transmitted by the TRP, thereby improving system reliability.

[0012] Specific embodiments of the present invention are disclosed in detail below with reference to the following description and drawings, which show how the principles of the present invention may be employed, but are not limited in scope to these embodiments, which may include various changes, modifications, and alternatives within the scope of the appended claims.

[0013] Additionally, features described and / or illustrated in one embodiment may be used in the same or similar manner in one or more other embodiments, may be combined with features in the other embodiments, or may be substituted for features in the other embodiments.

[0014] It should be noted that terms such as "comprise / have" when used in this specification refer to the presence of a feature, element, step, or assembly, but do not exclude the presence or addition of one or more other features, elements, steps, or assemblies. [Brief description of the drawings]

[0015] Elements and features described in one drawing or one embodiment of the invention may be combined with elements and features shown in one or more other drawings or embodiments, and in the drawings, like symbols are used to indicate corresponding parts in several drawings and also to indicate corresponding parts used in several embodiments.

[0016] The included drawings are used to provide a further understanding of the embodiments of the present invention, and these drawings constitute a part of this specification, illustrate the embodiments of the present invention, and together with the written description, are used to explain the principles of the present invention. Also, it is obvious that the drawings described below are only for illustrating some embodiments of the present invention, and a person skilled in the art can derive other drawings based on these drawings without creative labor. [Figure 1] FIG. 1 is a diagram illustrating an example of an NR communication system. [Diagram 2] A figure showing adjustments made to PDCCH monitoring in CORESET#0. [Diagram 3]FIG. 13 is a diagram illustrating adjustments made to the PUCCH. [Figure 4] FIG. 1 illustrates another example of an NR communication system. [Diagram 5] FIG. 1 is a diagram illustrating yet another example of an NR communication system. [Figure 6] 1 is a diagram illustrating an example of a wireless communication method according to an embodiment of a first aspect of the present invention. [Figure 7] FIG. 1 illustrates an example of a link recovery procedure. [Figure 8] FIG. 13 illustrates another example of a link recovery procedure. [Figure 9] FIG. 1 is a diagram illustrating another example of an NR communication system. [Figure 10] FIG. 1 is a diagram illustrating another example of an NR communication system. [Figure 11] FIG. 10 is a diagram illustrating an example of a wireless communication method according to an embodiment of the second aspect of the present invention. [Figure 12] FIG. 1 illustrates an example of a link recovery procedure. [Figure 13] FIG. 13 illustrates another example of a link recovery procedure. [Figure 14] FIG. 11 is a diagram illustrating an example of a wireless communication method according to an embodiment of a third aspect of the present invention. [Figure 15] FIG. 13 is a diagram illustrating an example of a wireless communication device according to an embodiment of the fourth aspect of the present invention. [Figure 16] FIG. 13 is a diagram illustrating an example of a wireless communication device according to an embodiment of the fifth aspect of the present invention. [Figure 17] FIG. 13 is a diagram illustrating an example of a wireless communication device according to an embodiment of a sixth aspect of the present invention. [Figure 18] FIG. 13 is a diagram illustrating an example of a communication system according to an embodiment of a seventh aspect of the present invention. [Figure 19] FIG. 13 is a diagram illustrating an example of a terminal device according to an embodiment of the seventh aspect of the present invention. [Figure 20] FIG. 13 is a diagram illustrating an example of a network device according to an embodiment of the seventh aspect of the present invention. DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS

[0017] The above and other features of the present invention will become apparent from the following detailed description and the accompanying drawings, in which: While the specification and drawings disclose certain embodiments of the present invention, these are illustrative of only some of the embodiments which may employ the principles of the present invention, and it is to be understood that the present invention is not limited to the described embodiments, but rather includes all modifications, variations and alternatives which fall within the scope of the appended claims.

[0018] In an embodiment of the present invention, the term "communication network" or "wireless communication network" may refer to a network conforming to any communication standard, such as Long Term Evolution (LTE), LTE-Advanced (LTE-A), Wideband Code Division Multiple Access (WCDMA), High-Speed ​​Packet Access (HSPA), etc.

[0019] Additionally, communication between devices in the communication system may be performed according to any stage of communication protocol, including, but not limited to, the following communication protocols: 1G (generation), 2G, 2.5G, 2.75G, 3G, 4G, 4.5G, and future 5G, New Radio (NR), and / or other conventional or future developed communication protocols.

[0020] In the embodiment of the present invention, the term "network device" refers to a device that connects a terminal device to a communication network and provides services to the terminal device in a communication system, for example, the network device may include, but is not limited to, a base station (BS), an access point (AP), a transmission reception point (TRP), a broadcast transmitter, a mobile management entity (MME), a network gateway, a server, a radio network controller (RNC), a base station controller (BSC), etc.

[0021] Among them, the base station may include, but is not limited to, the following: Node B (NodeB or NB), evolved Node B (eNodeB or eNB), 5G base station (gNB), etc., and may further include RRH (Remote Radio Head), RRU (Remote Radio Unit), relay, or low power node (e.g., femto, pico, etc.). In addition, the term "base station" may include some or all of the functions thereof, and each base station can provide communication coverage for a specific geographical area. The term "cell" may refer to a base station and / or the area it covers, depending on the context of the term.

[0022] In the embodiments of the present invention, the term "User Equipment" (UE) or "Terminal Equipment" (TE) refers to a device that accesses a communication network and receives services from the network, for example, via a network device. A User Equipment may be fixed or mobile, and may also be called a Mobile Station (MS), a terminal, a Subscriber Station (SS), an Access Terminal (AT), a station, etc.

[0023] Among these, user devices may include, but are not limited to, the following: cellular phones, personal digital assistants (PDAs), wireless modems, wireless communication devices, handheld devices, machine type communication devices, laptop computers, cordless telephones, smartphones, smart watches, digital cameras, etc.

[0024] Furthermore, in a scenario such as IoT (Internet of Things), the terminal device may further be an apparatus or device that performs on-site monitoring or measurement, and may include, for example, an MTC (Machine Type Communication) terminal, an in-vehicle communication terminal, a D2D (Device to Device) terminal, an M2M (Machine to Machine) terminal, etc., but is not limited to these.

[0025] In order to more clearly illustrate the embodiments of the present invention, some concepts and definitions related to the embodiments of the present invention are described below.

[0026] Generally speaking, in an NR communication system, the beam failure recovery procedure mainly consists of five steps:

[0027] 1. Beam failure detection: A UE determines whether a beam failure occurs in a downlink control channel by measuring a reference signal related to the downlink control channel.

[0028] 2. New candidate beam identification: The UE measures the reference signal corresponding to the candidate beam.

[0029] 3. Beam failure request (BFRQ). When the UE detects a beam failure and simultaneously detects some available candidate beams, the UE selects the beam with index q from among these available candidate beams. new Then, the UE sends a beam failure request to the base station, where the index of the candidate beam reported in the beam failure request is q new It is.

[0030] 4. Base station feedback reception (gNB response reception) or beam failure recovery response (BFRR): After transmitting a beam failure request, the UE monitors the feedback to the beam failure request from the base station correspondingly.

[0031] 5. After receiving the above-mentioned base station feedback, the UE adjusts the transmission / reception parameters of some channels.

[0032] a) Adjustment for PDCCH monitoring in CORESET#0 (see Figure 2) i. After receiving the 28 symbols fed back by the base station in the PCell or PSCell, the UE selects the determined candidate beam (q new ) based on antenna port quasi-collocation (QCL) parameters corresponding to the PDCCH in CORESET#0.

[0033] b) Adjustment for PUCCH (see Figure 3) i. After receiving the 28 symbols fed back by the above-mentioned base station in the PCell or PSCell, and before the UE receives the MAC-CE signaling or RRC signaling for changing the PUCCH spatial relationship, the UE sends a PUCCH in the cell that previously sent a beam failure request according to the following description: 1. The spatial filter used by the PUCCH is the same as the spatial filter used to transmit the beam failure request; and 2. Some of the power control parameters used by the above PUCCH are related to the reference signal index corresponding to the previously determined candidate beam (q d =q new ), and the power control parameters of other parts are reset to 0 (q u =0;l=0).

[0034] In order to solve the problem existing in the conventional system, i.e., the problem that a link recovery procedure cannot be performed for a link corresponding to a TRP where a link failure occurs, an embodiment of the present invention provides a corresponding solution, so that the NR system can recover a link corresponding to a TRP where a link failure occurs, thereby improving the reliability of the system.

[0035] Various embodiments of the present invention will now be described with reference to the accompanying drawings, in which: It should be noted that these embodiments are merely illustrative and are not intended to limit the present invention.

[0036] <Example of the first aspect> In an embodiment of the present invention, a wireless communication method is provided, which is described from the terminal device side, and the terminal device is associated with at least two TRPs.

[0037] According to the embodiment of the present invention, the QCL parameters for monitoring the PDCCH can be determined according to the TRP performing the link recovery procedure. The advantage of doing so is that after the terminal device receives the feedback of the base station, the terminal device can use the appropriate QCL parameters to monitor the PDCCH according to the relationship between the TRP and the PDCCH, thereby improving the reliability of the system.

[0038] As shown in Figure 4, when one PDCCH is transmitted by TRP#2 (link failure), after the terminal device receives the feedback of the base station, the terminal device needs to reset the QCL parameter for monitoring the PDCCH. The advantage of doing so is that when only one PDCCH is transmitted by the TRP with link failure, the UE resets the QCL parameter for monitoring the PDCCH.

[0039] As shown in Figure 5, when one PDCCH is transmitted by TRP#1 (link normal), corresponding to the situation in Figure 4, after the terminal device receives the feedback of the base station, the terminal device does not need to reset the QCL parameter for monitoring the PDCCH. The advantage of doing so is that it can avoid the terminal device from erroneously adjusting the QCL parameter for monitoring the PDCCH, and can avoid the deterioration of the reliability of the downlink control channel.

[0040] 6 is a diagram illustrating a wireless communication method in an embodiment of the present invention. As shown in FIG. 6, the method includes the following steps:

[0041] 601: After the terminal device receives first downlink control information associated with a beam failure or link failure, the terminal device monitors second downlink control information based on an antenna port QCL parameter that is the same as an antenna port QCL parameter associated with a first reference signal.

[0042] Among them, the first reference signal is associated with a first TRP among the at least two TRPs, the TRP associated with the second downlink control information and the first TRP associated with the first reference signal are the same, and the first reference signal is identified among at least one reference signal for beam recovery.

[0043] According to an embodiment of the present invention, when a UE is associated with multiple TRPs, the UE can ensure that the UE uses a determined (measured and selected) reference signal for beam recovery based on the TRP where a beam failure occurs after receiving the beam failure feedback from the base station to more reliably monitor the PDCCH associated with the TRP. Since the UE has experienced a link failure with the TRP, the original beam direction used to monitor the PDCCH associated with the TRP is no longer reliable. Therefore, after receiving the beam failure feedback from the base station, the beam direction of the PDCCH is reset to the beam direction corresponding to the previously determined candidate beam. Thus, the UE monitors the PDCCH according to the beam direction corresponding to the previously determined candidate beam.

[0044] In an embodiment of the present invention, the above-mentioned TRP is equivalent to at least one of the following: Control resource collection pool (CORESET pool); and Transmission configuration indication state (TCI state) It is.

[0045] In the embodiment of the present invention, the terminal device is associated with at least two TRPs refers to the terminal device being configured with control resource sets (CORESETs) for the above-mentioned at least two TRPs. For example, if a first control resource set and a second control resource set are configured in the active downlink BWP of a serving cell, the first control resource set is not configured with CORESETPoolIndex or is configured with a CORESETPoolIndex value of 0, and the second control resource set is configured with CORESETPoolIndex value of 1, the terminal device is considered to be associated with two TRPs. That is, in some embodiments, the terminal device is associated with at least two TRPs refers to the terminal device being configured with a first control resource set and a second control resource set in the active downlink BWP of a serving cell, the first control resource set is not configured with CORESETPoolIndex or is configured with a CORESETPoolIndex value of 0, and the second control resource set is configured with CORESETPoolIndex value of 1.

[0046] In some embodiments of the present invention, the fact that the first reference signal is associated with the first TRP is indicated by RRC signaling.

[0047] For example, the above-mentioned RRC signaling indicates the ID of the TRP corresponding to the above-mentioned first reference signal, i.e., the ID of the TRP indicates that the first reference signal is related to the first TRP. In this way, the relationship between the candidate beam and the corresponding TRP is explicitly set by the RRC signaling, so that the UE can accurately find the corresponding candidate beam for beam recovery according to the TRP where the beam failure (link failure) occurs.

[0048] Also, for example, the above-mentioned RRC signaling refers to the RRC signaling for indicating the above-mentioned first TRP, that is, the RRC signaling acts on the first TRP, so that it can be determined that the first reference signal indicated by the RRC signaling is related to the first TRP. Thus, by indicating the relationship between the candidate beam and the corresponding TRP by a plurality of RRC signalings for different TRPs, the UE can accurately find the corresponding candidate beam for beam recovery based on the TRP where the beam failure (link failure) occurs. In this method, the reference signals acting on different TRPs are grouped (divided into a plurality of RRC signalings), so that the terminal device can grasp the relationship between the reference signal included in each group (RRC signaling) and the TRP according to the relationship between each group (RRC signaling) and the TRP. In this way, it is possible to avoid indicating the association between each candidate beam and the TRP one by one, and reduce the signaling overhead.

[0049] In some embodiments of the present invention, the above-mentioned first reference signal being identified from among at least one reference signal for beam recovery means that the first reference signal is identified from among candidate beam reference signals associated with the above-mentioned first TRP in one candidate beam reference signal list, or the first reference signal is identified from among one candidate beam reference signal list for the above-mentioned first TRP.

[0050] In some embodiments of the present invention, the TRP associated with the second downlink control information and the above-mentioned first TRP associated with the first reference signal are the same, the second downlink control information is monitored in one control resource set (CORESET), and the TRP associated with the control resource set (CORESET) is the same as the above-mentioned first TRP. That is, when the second downlink control information is monitored in one control resource set, and the TRP associated with the control resource set and the TRP associated with the first reference signal are the same, the terminal device monitors the above-mentioned second downlink control information in the control resource set according to the antenna port QCL parameters (antenna port quasi-collocation parameters) associated with the first reference signal.

[0051] In an embodiment of the present invention, the terminal device receives the above-mentioned first downlink control information according to the antenna port QCL parameter associated with the above-mentioned first reference signal, that is, the antenna port QCL parameter for receiving the above-mentioned first downlink control information and the antenna port QCL parameter for monitoring the above-mentioned second downlink control information are the same, and both are the same as the antenna port QCL parameter associated with the first reference signal.

[0052] In the embodiment of the present invention, the above-mentioned first downlink control information is also related to the above-mentioned first TRP. This can reduce the time interval between the transmission of the first downlink control information (BFRR) and the transmission of the subsequent second downlink control information (PDCCH) whose beam direction is reset, and improve system performance. For example, when the interaction time between different TRPs is relatively long, if the first downlink control information and the subsequent second downlink control information whose beam direction is reset are transmitted by different TRPs, after the first downlink control information is transmitted by one TRP, the other TRP can confirm the transmission after a long time, and then adjust the beam direction of the transmission of the second downlink control information, which may cause a relatively high latency and degrade system performance.

[0053] In some embodiments, the first downlink control information is associated with the first TRP, which means that the first downlink control information is received in a BFR search space, and the BFR search space is associated with the above-mentioned first TRP.

[0054] In some embodiments, the first downlink control information is associated with a first TRP, which means that the first downlink control information is received in one control resource set, and the control resource set is associated with the above-mentioned first TRP.

[0055] In some embodiments of the present invention, as shown in FIG. 6, before the terminal device receives the above-mentioned first downlink control information, the method further includes the following steps:

[0056] 600: The terminal device transmits second information to a network device, the second information being related to an index of the first reference signal and / or an index of the first TRP.

[0057] Thus, the network device can determine the first reference signal according to the index of the TRP and the index of the reference signal, and transmit the first downlink control information and / or the second downlink control information according to the spatial information (QCL parameter) of the reference signal. In some embodiments, the index of the first reference signal is q new This is expressed as:

[0058] In some embodiments of the present invention, the second downlink control information is monitored in one control resource set, and the index of the control resource set is 0. That is, the second downlink control information is monitored in a control resource set CORESET#0 with an index of 0. In this way, when the TRP corresponding to the CORESET#0 and the TRP associated with the above-mentioned first reference signal are the same (both are the first TRP), the terminal device can monitor the second downlink control information in CORESET#0 based on the antenna port QCL parameter associated with the first reference signal. Moreover, the present invention is not limited thereto, and the index of the control resource set may be another ID other than 0.

[0059] In some embodiments of the present invention, after the terminal device receives the above-mentioned first downlink control information, the terminal device refers to 28 symbols after the terminal device receives the last symbol of the first downlink control information. Before that, the terminal device can use another beam to receive the downlink control information associated with the above-mentioned first TRP, but the present invention is not limited thereto.

[0060] In some embodiments of the present invention, the terminal device may monitor the above-mentioned second downlink control information in a primary cell, and may monitor the above-mentioned second downlink control information in a secondary cell. Here, the primary cell is, for example, a PCell, a PSCell, etc., and the secondary cell is, for example, a SCell, etc. For their definitions, reference may be made to the related art, and detailed descriptions thereof will be omitted here.

[0061] The method of the embodiment of the present invention will now be described with reference to one specific example.

[0062] In this example, the cell in which the UE operates is a PCell, the control resource set for monitoring the second downlink control information is CORESET#0, and the UE is associated with two TRPs (or, it can be said that the control resource set configured in the UE is associated with two TRPs).

[0063] Among them, the control resource set configured for a UE is associated with two TRPs, for example, when a first CORESETs and a second CORESETs are configured for a UE in an active downlink BWP of a serving cell, the first CORESETs are not configured with CORESETPoolIndex or are configured with CORESETPoolIndex with a value of 0, and the second CORESETs are configured with CORESETPoolIndex with a value of 1. In this case, the UE is considered to be associated with two TRPs.

[0064] The above conditions can be written in English as follows:

[0065] [Table 1] In this example, the UE detects a reference signal associated with TRP#0 (e.g., considers a reference signal associated with a CORESET where CORESETPoolIndex is not set or where CORESETPoolIndex is set with a value of 0) and finds that a beam failure (link failure) occurs in the link associated with TRP#0, in which case the UE initiates a corresponding link recovery procedure. Figure 7 illustrates the link recovery procedure. As shown in Figure 7, in the link recovery procedure, the UE can perform the following steps:

[0066] Step 1: The UE transmits uplink information (the above-mentioned second information) to the base station (gNB TRP#0), and the uplink information may be transmitted, for example, by a PRACH or a PUCCH, and the uplink information may include information related to an identified candidate beam reference signal (identified candidate beam RS (the above-mentioned first reference signal)) (for example, an index of the first reference signal, q new The uplink information may be the index (TRP#0) of the TRP associated with the reference signal. new The method of obtaining the above information is as described above, and therefore a detailed description thereof will be omitted here.

[0067] Step 2: The UE receives the above reference signal (the index of the reference signal is q new The first downlink control signal (BFRR) is received based on the antenna port QCL parameter associated with the first downlink control signal (BFRR).

[0068] The above-mentioned BFRR is the feedback of step 1, which may be a DCI format scrambled by C-RNTI or MCS-C-RNTI, or may be a DCI format scrambled by C-RNTI and for scheduling PUSCH.

[0069] Step 3: After the UE receives 28 symbols from the last symbol of the above-mentioned BFRR, when CORESET#0 corresponds to TRP#0, in other words, when the CORESETPoolIndex of CORESET#0 and the CORESETPoolIndex associated with the above-mentioned reference signal are the same, the UE monitors the PDCCH in CORESET#0 based on the antenna port QCL parameters associated with the above-mentioned reference signal.

[0070] Among them, as shown in FIG. 7, after the UE receives the last symbol of the above-mentioned BFRR and before the above-mentioned 28 symbols, the UE can further monitor and receive the PDCCH from another TRP (TRP#1 shown in FIG. 7).

[0071] Figure 8 shows a situation corresponding to that of Figure 7. As shown in Figure 8, other conditions are similar, but CORESET#0 is associated with TRP#1, in which case the QCL parameters associated with CORESET#0 are not adjusted, i.e., there is no step 3 described above in Figure 7.

[0072] Note that, although the above-mentioned FIG. 6 and the like are for illustrative purposes of the embodiments of the present invention, the present invention is not limited thereto. For example, some operations (steps) can be appropriately adjusted, increased or decreased. In addition, a person skilled in the art can make appropriate modifications based on the above-mentioned contents without being limited to the description of the above-mentioned FIG. 6 and the like.

[0073] According to the method of the embodiment of the present invention, the QCL parameters for monitoring the PDCCH (second downlink control information) are determined based on the TRP in which the link recovery occurs, so that after the terminal device receives the feedback from the base station, the terminal device can monitor the PDCCH using appropriate QCL parameters based on the relationship between the TRP and the PDCCH, thereby improving the reliability of the system.

[0074] <Example of the second aspect> In an embodiment of the present invention, a wireless communication method is provided, which is described from the terminal device side, and the terminal device is associated with at least two TRPs.

[0075] According to an embodiment of the present invention, the spatial filter and / or power control parameters for transmitting PUCCH can be determined according to the TRP performing the link recovery procedure. The advantage of doing so is that after the terminal device receives the feedback of the base station, the terminal device can transmit the PUCCH using the appropriate spatial filter and / or power control parameters according to whether the PUCCH is transmitted by the TRP, thereby improving the reliability of the system.

[0076] As shown in Figure 9, when PUCCH is transmitted to TRP#2 (link failure), after the terminal device receives the feedback of the base station, the terminal device needs to reset the spatial filter and / or power control parameters for transmitting the PUCCH. The advantage of doing so is that only when PUCCH is transmitted to a TRP with a link failure, the UE resets the spatial filter and / or power control parameters for transmitting the PUCCH.

[0077] As shown in Figure 10, corresponding to the situation of Figure 9, when PUCCH is transmitted to TRP#1 (link normal), after the terminal device receives the feedback of the base station, the terminal device does not need to reset the spatial filter and / or power control parameters for transmitting the PUCCH. The advantage of doing so is that it can avoid the terminal device from erroneously adjusting the spatial filter for transmitting the PUCCH, and avoid the deterioration of the reliability of the uplink control channel.

[0078] 11 is a diagram illustrating a wireless communication method in an embodiment of the present invention. As shown in FIG. 11, the method includes the following steps:

[0079] 1101: After the terminal device receives first downlink control information associated with a beam failure or link failure, the terminal device transmits first uplink control information based on a spatial filter and / or power for a first reference signal.

[0080] Among them, the first reference signal is associated with a first TRP among the at least two TRPs, the TRP associated with the first uplink control information and the first TRP associated with the first reference signal are the same, and the first reference signal is identified from among at least one reference signal for beam recovery.

[0081] According to an embodiment of the present invention, when a UE is associated with multiple TRPs, the UE can ensure that the PUCCH associated with the TRP is more reliably transmitted using a reference signal for beam recovery determined (measured and selected) after receiving beam failure feedback from the base station according to the TRP where beam failure occurs. Since the UE has experienced link failure in the TRP, the original beam direction used for transmitting the PUCCH associated with the TRP is no longer reliable. Therefore, after receiving beam failure feedback from the base station, the beam direction of the PUCCH is reset to a beam direction corresponding to an identified candidate beam determined before reception. Thus, the UE transmits the PUCCH according to a beam direction corresponding to the candidate beam determined before reception.

[0082] In an embodiment of the present invention, the above-mentioned TRP is equivalent to at least one of the following: Control resource collection pool (CORESET pool); and Transmission configuration indication state (TCI state) It is.

[0083] In the embodiment of the present invention, the terminal device is associated with at least two TRPs refers to the terminal device being configured with control resource sets (CORESETs) for the above-mentioned at least two TRPs. For example, if a first control resource set and a second control resource set are configured in the active downlink BWP of a serving cell, the first control resource set is not configured with CORESETPoolIndex or is configured with a value of 0, and the second control resource set is configured with CORESETPoolIndex of 1, the terminal device is considered to be associated with two TRPs. That is, in some embodiments, the terminal device is associated with at least two TRPs refers to the terminal device being configured with a first control resource set and a second control resource set in the active downlink BWP of a serving cell, in which the first control resource set is not configured with CORESETPoolIndex or is configured with a value of 0, and the second control resource set is configured with CORESETPoolIndex of 1.

[0084] In some embodiments of the present invention, the fact that the first reference signal is associated with the first TRP is indicated by RRC signaling.

[0085] For example, the ID of the TRP corresponding to the first reference signal is indicated by the above-mentioned RRC signaling, i.e., the ID of the TRP indicates that the first reference signal is related to the first TRP. Thus, the relationship between the candidate beam and the corresponding TRP is explicitly set by the RRC signaling, so that the UE can accurately find the corresponding candidate beam for beam recovery according to the TRP where the beam failure (link failure) occurs.

[0086] Also, for example, the above-mentioned RRC signaling is RRC signaling for indicating the above-mentioned first TRP, that is, the RRC signaling acts on the first TRP, so that it can be determined that the first reference signal indicated by the RRC signaling is related to the first TRP. Thus, by indicating the relationship between the candidate beam and the corresponding TRP by multiple RRC signaling for different TRPs, the UE can accurately find the corresponding candidate beam for beam recovery based on the TRP where the beam failure (link failure) occurs. In this method, by grouping (knowing multiple RRC signaling) the reference signals acting on different TRPs, the terminal device can grasp the relationship between the reference signal included in each set (RRC signaling) and the TRP based on the relationship between each set (RRC signaling) and the TRP. In this way, it is possible to avoid indicating the association between each candidate beam and the TRP one by one, and reduce the signaling overhead.

[0087] In some embodiments of the present invention, the above-mentioned first reference signal being identified from among at least one reference signal for beam recovery means that the first reference signal is identified from among candidate beam reference signals associated with the above-mentioned first TRP in one candidate beam reference signal list, or the first reference signal is identified from among one candidate beam reference signal list for the above-mentioned first TRP.

[0088] In some embodiments of the present invention, the TRP associated with the first uplink control information and the above-mentioned first TRP associated with the first reference signal are the same, which refers to the TRP associated with the control resource set for receiving the DCI triggering the above-mentioned first uplink control information is the same as the above-mentioned first TRP. That is, when a PUCCH transmission is triggered by a DCI and a CORESET for receiving the DCI is associated with a first TRP, the PUCCH transmission is related to the first TRP.

[0089] For example, if a CORESET corresponding to a DCI is associated with TRP#0, the DCI schedules a PDSCH, and indicates that a PUCCH transmission is used to feed back corresponding HARQ-ACK information, the PUCCH transmission is said to be associated with TRP#0.

[0090] Also, for example, if a CORESET corresponding to one DCI is associated with TRP#0, the DCI indicates that at least one PDSCH is active and one PUCCH transmission is used to feedback HARQ-ACK information of the corresponding PDSCH, the transmission of the PUCCH can be said to be associated with TRP#0.

[0091] Thus, by comparing the relationship between the DCI corresponding to the PUCCH and the TRP, the UE can accurately find the corresponding PUCCH transmission that needs to reset the spatial relationship based on the TRP where the beam failure (link failure) occurs, so that the UE can transmit the PUCCH using the accurate beam and improve the system performance.

[0092] In the above embodiment, the first uplink control information is associated with one DCI format, and the TRP associated with the CORESET for receiving the DCI format is the same as the above-mentioned first TRP.

[0093] In the above embodiment, the first uplink control information is associated with a DCI format, which means that the DCI format is used to trigger the first uplink control information, for example, the transmission of the first uplink control information is triggered by a DCI format corresponding to a PDCCH received in a CORESET, and the CORESET is associated with a first TRP.

[0094] In some embodiments of the present invention, the TRP associated with the first uplink control information and the above-mentioned first TRP associated with the first reference signal are the same, which refers to the reference signal for determining a spatial setting corresponding to the first uplink control information being the same as the reference signal for beam failure detection and / or the reference signal for identifying the candidate beam for recovery associated with the first TRP. That is, when the reference signal for determining a spatial setting corresponding to the transmission of one PUCCH is the same as the first reference signal associated with the first TRP, the transmission of the PUCCH is associated with the first TRP, in which the first reference signal refers to the reference signal for beam failure detection or the reference signal for identifying the candidate beam for recovery.

[0095] For example, CSI-RS#1 is a reference signal for beam failure detection associated with TRP#0, and at the same time, CSI-RS#1 is also a reference signal for spatial setting of PUCCH resource corresponding to PUCCH transmission. In this case, it can be said that the PUCCH transmission is associated with TRP#0.

[0096] Thus, due to the relationship between the reference signal for beam failure recovery (beam failure detection and / or candidate beam determination) and the TRP, the UE can accurately find the corresponding PUCCH transmission whose spatial relationship needs to be reset based on the TRP where the beam failure (link failure) occurs, so that the UE can transmit the PUCCH using the accurate beam and improve the system performance.

[0097] In some embodiments of the present invention, the TRP associated with the first uplink control information and the above-mentioned first TRP associated with the first reference signal are the same, which means that the TRP associated with the resource corresponding to the first uplink control information is the same as the above-mentioned first TRP. In some embodiments, the ID of the TRP associated with the resource corresponding to the first uplink control information may be indicated by RRC signaling. That is, when the RRC signaling indicates that the PUCCH resource corresponding to a PUCCH transmission is associated with the first TRP, the PUCCH transmission is associated with the first TRP.

[0098] For example, a resource corresponding to one PUCCH transmission is PUCCH-Resource#1. According to an instruction of RRC signaling, PUCCH-Resource#1 is associated with TRP#0. In this case, it can be said that the PUCCH transmission is related to TRP#0.

[0099] Therefore, by explicitly configuring the relationship between the PUCCH resource and the TRP through RRC signaling, the UE can accurately find the corresponding PUCCH transmission that needs to reset the spatial relationship based on the TRP where the beam failure (link failure) occurs, so that the UE can transmit the PUCCH using an accurate beam and improve the system performance.

[0100] In the embodiment of the present invention, the above-mentioned first downlink control information is also related to the above-mentioned first TRP. This can reduce the time interval between the transmission of the first downlink control information (BFRR) and the transmission of the subsequent first uplink control information (PUCCH) whose beam direction is reset, and improve system performance. For example, when the interaction time between different TRPs is relatively long, when the first downlink control information and the subsequent first uplink control information whose beam direction is reset are transmitted by different TRPs, after the first downlink control information is transmitted by one TRP, the other TRP can confirm the transmission after a long time, and then adjust the beam direction of the reception of the first uplink control information, which may cause a relatively high latency and degrade system performance.

[0101] In some embodiments, the first downlink control information is associated with the first TRP, which means that the first downlink control information is received in a BFR search space, and the BFR search space is associated with the above-mentioned first TRP.

[0102] In some embodiments, the first downlink control information is associated with a first TRP, which means that the first downlink control information is received in one control resource set, and the control resource set is associated with the above-mentioned first TRP.

[0103] In some embodiments of the present invention, as shown in FIG. 11, before the terminal device receives the above-mentioned first downlink control information, the method further includes the following steps:

[0104] 1100: The terminal device transmits second information to a network device, the second information being related to an index of the first reference signal and / or an index of the first TRP.

[0105] Thus, the network device can identify the first reference signal according to the index of the TRP and the index of the reference signal, and transmit the first downlink control information and / or receive the first uplink control information according to the spatial information (QCL parameter) of the reference signal. In some embodiments, the index of the first reference signal is q new This is expressed as:

[0106] In some embodiments of the present invention, after the terminal device receives the above-mentioned first downlink control information, the terminal device refers to 28 symbols after the terminal device receives the last symbol of the first downlink control information. Before that, the terminal device can use another beam to receive the downlink control information associated with the above-mentioned first TRP, but the present invention is not limited thereto.

[0107] In some embodiments of the present invention, the terminal device may transmit the above-mentioned first uplink control information in a primary cell, and may transmit the above-mentioned first uplink control information in a secondary cell. Here, the primary cell is, for example, a PCell, a PSCell, etc., and the secondary cell is, for example, a SCell, etc. For their definitions, reference may be made to the related art, and detailed descriptions thereof will be omitted here.

[0108] The method according to the present invention will now be described with reference to one specific example.

[0109] In this example, it is assumed that the cell in which the UE operates is a PCell, and the UE is associated with two TRPs (or, it may be said that the control resource set configured in the UE is associated with two TRPs).

[0110] Wherein, the control resource set configured for a UE is associated with two TRPs means, for example, that a first CORESETs and a second CORESETs are configured for a UE in an active downlink BWP of a serving cell, the first CORESETs are not configured with CORESETPoolIndex or are configured with CORESETPoolIndex with a value of 0, and the second CORESETs are configured with CORESETPoolIndex with a value of 1. In this case, the UE is considered to be associated with two TRPs.

[0111] The above conditions can be written in English as follows:

[0112] [Table 2] In this example, the UE detects a reference signal associated with TRP#0 (e.g., detects a reference signal associated with a CORESET in which CORESETPoolIndex is not set or CORESETPoolIndex is set with a value of 0) and discovers that a beam failure (link failure) has occurred in the link associated with TRP#0. In this case, the UE initiates a corresponding link recovery procedure. Figure 12 is a diagram showing the link recovery procedure. As shown in Figure 12, in the link recovery procedure, the UE can perform the following steps.

[0113] Step 1: The UE transmits uplink information (the above-mentioned second information) to the base station (gNB TRP#0), and the uplink information may be transmitted, for example, by a PRACH or a PUCCH, and the uplink information may include information related to an identified candidate beam reference signal (identified candidate beam RS (the above-mentioned first reference signal)) (for example, an index of the first reference signal, q new It may be the index (TRP#0) of the TRP associated with the reference signal. newThe method of obtaining the above information has been described above, and therefore a detailed description thereof will be omitted here.

[0114] Step 2: The UE receives the above reference signal (the index of the reference signal is q new The first downlink control signal (BFRR) is received based on the antenna port QCL parameter associated with the first downlink control signal (BFRR).

[0115] The above-mentioned BFRR is the feedback of step 1, which may be a DCI format scrambled by C-RNTI or MCS-C-RNTI, or may be a DCI format scrambled by C-RNTI and for scheduling PUSCH.

[0116] Step 3: After 28 symbols from when the UE receives the last symbol of the above-mentioned BFRR, when the UE transmits the first uplink control information (PUCCH) to the TRP#0, the UE transmits the PUCCH based on the spatial filter corresponding to the above-mentioned reference signal and / or the power corresponding to the above-mentioned reference signal. And the power control parameter is q u =0, l=0. Among them, q u For the meaning of and l, please refer to the related art.

[0117] Among them, as shown in FIG. 12, after the UE receives the last symbol of the above-mentioned BFRR and before the above-mentioned 28 symbols, the UE can further transmit uplink control information (PUCCH) to another TRP (TRP#1 shown in FIG. 12).

[0118] Figure 13 is a diagram showing a situation corresponding to that of Figure 12. As shown in Figure 13, although other conditions are similar, uplink control information (PUCCH) is associated with TRP#1, in which case the spatial filter or power corresponding to the transmission of the PUCCH is not adjusted, i.e., there is no above-mentioned step 3 in Figure 12.

[0119] The relationship between the transmission of the first uplink control information and the TRP has been described above, so a detailed description thereof will be omitted here.

[0120] Note that, although the above-mentioned FIG. 11 and the like are for explaining the embodiments of the present invention, the present invention is not limited thereto. For example, some operations (steps) can be appropriately adjusted, increased or decreased. In addition, a person skilled in the art can make appropriate modifications based on the above-mentioned contents without being limited to the description of the above-mentioned FIG. 11 and the like.

[0121] According to the method of the embodiment of the present invention, by determining a spatial filter and / or power control parameters for transmitting PUCCH (first uplink control information) based on a TRP in which link recovery occurs, after the terminal device receives feedback from the base station, the terminal device can transmit the PUCCH using an appropriate spatial filter and / or power control parameters based on whether the PUCCH is transmitted by the TRP, thereby improving the reliability of the system.

[0122] <Example of the third aspect> In the embodiments of the present invention, a wireless communication method is provided, which is described from the network side, and the method is a network-side process corresponding to the method in the embodiments of the first or second aspect, and the duplicated description of the same contents as those in the embodiments of the first and second aspects will be omitted here.

[0123] In an embodiment of the present invention, the entity executing the method (referred to as a network device) is, for example, a TRP in which a beam failure (or link failure) has occurred between the terminal device and the first and second aspects of the embodiment, such as TRP#2 shown in Figures 4 and 5, or TRP#2 shown in Figures 9 and 10, or TRP#0 shown in Figure 7, or TRP#0 shown in Figure 12.

[0124] 14 is a diagram showing an example of a wireless communication method in an embodiment of the invention. As shown in FIG. 14, the method includes the following steps:

[0125] 1401: A network device sends configuration information to a terminal device, the configuration information configuring the terminal device to associate with at least two TRPs; 1402: The network device receives second information of the terminal device transmission, the second information relating to an index of a first reference signal and / or an index of a TRP associated with the first reference signal; and 1403: The network device determines the first reference signal based on the second information, and sends first downlink control information to the terminal device.

[0126] Thus, corresponding to the method of the embodiment of the first aspect, after receiving the above-mentioned first downlink control information, the terminal device can monitor the second downlink control information based on the antenna port QCL parameter that is the same as the antenna port QCL parameter associated with the first reference signal, where the first reference signal is associated with a first TRP among the at least two TRPs, the TRP associated with the second downlink control information and the first TRP associated with the first reference signal are the same, and the first reference signal is identified among at least one reference signal for beam recovery. Note that the processing on the terminal device side has already been described in detail in the embodiment of the first aspect, so the contents thereof are incorporated herein and will not be described in detail here.

[0127] Also, according to the method of the embodiment of the second aspect, after receiving the above-mentioned first downlink control information, the terminal device can transmit the first uplink control information according to the spatial filter and / or power for the first reference signal, wherein the first reference signal is associated with a first TRP among the at least two TRPs, the TRP associated with the first uplink control information and the first TRP associated with the first reference signal are the same, and the first reference signal is identified among at least one reference signal for beam recovery. Note that the processing on the terminal device side has already been described in detail in the embodiment of the second aspect, and the contents thereof are incorporated herein, and the detailed description thereof is omitted here.

[0128] It should be noted that the above-mentioned FIG. 14 is for illustrative purposes only, but the present invention is not limited thereto. For example, the execution order between the operations can be appropriately adjusted, or some operations can be added or removed. In addition, those skilled in the art can make appropriate modifications based on the above-mentioned contents without being limited to the description of FIG. 14.

[0129] According to the method of the embodiment of the present invention, the network device can determine the TRP where the link failure occurs and the corresponding first reference signal for link recovery according to the second information of the terminal report. After receiving the second information and determining the first reference signal, the network device can send the feedback (first downlink control information) of the base station. After sending the feedback (first downlink control information) of the base station, the network device can use a suitable spatial direction to send the PDCCH or receive the PUCCH according to the relationship between the TRP corresponding to the reference signal and the PDCCH (second downlink control information) or PUCCH (first uplink control information), thereby improving the reliability of the system.

[0130] <Example of the fourth aspect> In an embodiment of the present invention, a wireless communication device is provided, which may for example be a terminal device or may be one or more components or assemblies arranged in the terminal device.

[0131] 15 is a diagram illustrating an example of a wireless communication device according to an embodiment of the present invention. The principle by which the device solves the problem is similar to that of the method according to the embodiment of the first aspect, and therefore the specific implementation of the device can refer to the implementation of the method according to the embodiment of the first aspect, and redundant description of the same content will be omitted here.

[0132] As shown in FIG. 15, the wireless communication device 1500 of an embodiment of the present invention includes a monitoring unit 1501, which monitors second downlink control information based on an antenna port QCL parameter that is the same as the antenna port QCL parameter associated with a first reference signal after the terminal device receives first downlink control information associated with a beam failure or link failure.

[0133] Among them, the first reference signal is associated with a first TRP among the at least two TRPs, the TRP associated with the second downlink control information and the first TRP associated with the first reference signal are the same, and the first reference signal is identified from among at least one reference signal for beam recovery.

[0134] In some embodiments, the first reference signal is associated with the first TRP by RRC signaling, for example, the RRC signaling indicates an ID of a TRP corresponding to the first reference signal, or for example, the RRC signaling is RRC signaling for indicating the first TRP.

[0135] In some embodiments, the first reference signal being identified from among at least one reference signal for beam recovery means that the first reference signal is identified from among candidate beam reference signals associated with the first TRP in one candidate beam reference signal list.

[0136] In some embodiments, the first reference signal being identified from among at least one reference signal for beam recovery means that the first reference signal is identified from among one candidate beam reference signal list for the first TRP.

[0137] In some embodiments, the terminal device is associated with at least two TRPs, which means that control resource sets (CORESETs) for the at least two TRPs are configured in the terminal device.

[0138] In some embodiments, the terminal device is associated with at least two TRPs, which means that a first control resource set and a second control resource set are configured in the terminal device in the active downlink BWP of the serving cell, in which CORESETPoolIndex is not configured in the first control resource set or a CORESETPoolIndex with a value of 0 is configured, and CORESETPoolIndex with a value of 1 is configured in the second control resource set.

[0139] In some embodiments, the TRP associated with the second downlink control information and the first TRP associated with the first reference signal are the same, which means that the second downlink control information is monitored in one control resource set (CORESET), and the TRP associated with the control resource set (CORESET) and the first TRP are the same.

[0140] In some embodiments, as shown in FIG. 15, the apparatus 1500 further includes:

[0141] A receiving unit 1502: receives the first downlink control information according to an antenna port QCL parameter associated with the first reference signal.

[0142] In some embodiments, the first downlink control information is associated with the first TRP. In some embodiments, the first downlink control information is associated with the first TRP refers to the first downlink control information being received in a BFR search space, and the BFR search space is associated with the first TRP. In some embodiments, the first downlink control information is associated with the first TRP refers to the first downlink control information being received in a control resource set, and the control resource set is associated with the first TRP.

[0143] In some embodiments, as shown in FIG. 15, the apparatus 1500 further includes:

[0144] A sending unit 1503: sending an index of the first reference signal to a network device before the terminal device receives the first downlink control information.

[0145] In some embodiments, the second downlink control information is monitored in one control resource set, and an index of the control resource set is 0.

[0146] In some embodiments, after the terminal device receives the first downlink control information, it means that the terminal device receives the last symbol of the first downlink control information 28 symbols later.

[0147] In some embodiments, the monitoring unit 1501 monitors the second downlink control information in a primary cell (PCell or PSCell) or a secondary cell (SCell).

[0148] In some embodiments, the TRP is equivalent to at least one of a control resource set pool (CORESET pool) and a transmission configuration indication state (TCI state).

[0149] Although each component or module according to the present invention has been described above, the present invention is not limited thereto. The wireless communication device 1500 according to the embodiment of the present invention may further include other components or modules, and the specific contents of these components or modules can be found in the related art.

[0150] 15 shows only the connection relationships or signal directions between each component or module for convenience, but various related technologies such as bus connection may be adopted as understood by those skilled in the art. Each of these components or modules may be realized by hardware such as a processor, a memory, a transmitter, a receiver, etc., but the implementation of the present invention is not limited thereto.

[0151] According to the embodiment of the present invention, in accordance with the embodiment of the first aspect, it is possible to improve the reliability of the system.

[0152] <Example of the fifth aspect> In an embodiment of the present invention, a wireless communication device is provided, which may for example be a terminal device or may be one or more components or assemblies arranged in a terminal device.

[0153] FIG. 16 is a diagram showing an example of a wireless communication device in an embodiment of the present invention. The principle by which the device solves a problem is similar to that of the method of the embodiment of the second aspect, so for specific implementation, reference may be made to the implementation of the method of the embodiment of the second aspect, and duplicated explanations of the same content will be omitted here.

[0154] As shown in FIG. 16, a wireless communication device 1600 of an embodiment of the present invention includes a first transmitting unit 1601, which transmits first uplink control information based on a spatial filter and / or power for a first reference signal after the terminal device receives first downlink control information associated with a beam failure or link failure.

[0155] Among them, the first reference signal is associated with a first TRP among the at least two TRPs, the TRP associated with the first uplink control information and the first TRP associated with the first reference signal are the same, and the first reference signal is identified from among at least one reference signal for beam recovery.

[0156] In some embodiments, the first reference signal is associated with the first TRP by RRC signaling, for example, the RRC signaling indicates an ID of a TRP corresponding to the first reference signal, or for example, the RRC signaling is RRC signaling for indicating the first TRP.

[0157] In some embodiments, the first reference signal being identified from among at least one reference signal for beam recovery means that the first reference signal is identified from among candidate beam reference signals associated with the first TRP in one candidate beam reference signal list.

[0158] In some embodiments, the first reference signal being identified from among at least one reference signal for beam recovery means that the first reference signal is identified from among one candidate beam reference signal list for the first TRP.

[0159] In some embodiments, the terminal device is associated with at least two TRPs, which means that control resource sets (CORESETs) for the at least two TRPs are configured in the terminal device.

[0160] In some embodiments, the terminal device is associated with at least two TRPs, which means that a first control resource set and a second control resource set are configured in the terminal device in the active downlink BWP of the serving cell, in which CORESETPoolIndex is not configured in the first control resource set or a CORESETPoolIndex with a value of 0 is configured, and CORESETPoolIndex with a value of 1 is configured in the second control resource set.

[0161] In some embodiments, the TRP associated with the first uplink control information and the first TRP associated with the first reference signal are the same, which refers to at least one of the following: A TRP associated with a control resource set for receiving DCI triggering the first uplink control information is the same as the first TRP; A reference signal for determining a spatial configuration corresponding to the first uplink control information is the same as a reference signal for detecting beam failure and / or determining a recovery candidate beam associated with the first TRP; and The TRP associated with the resource corresponding to the first uplink control information is the same as the first TRP.

[0162] In some embodiments, the identity of a TRP associated with a resource corresponding to the first uplink control information is indicated by RRC signaling.

[0163] In some embodiments, as shown in FIG. 16, the apparatus 1600 further includes:

[0164] A receiving unit 1602: receives the first downlink control information according to an antenna port QCL parameter associated with the first reference signal.

[0165] In some embodiments, the first downlink control information is associated with the first TRP. In some embodiments, the first downlink control information is associated with the TRP refers to the first downlink control information being received in a BFR search space, and the BFR search space is associated with the first TRP. In some embodiments, the first downlink control information is associated with the TRP refers to the first downlink control information being received in a control resource set, and the control resource set is associated with the first TRP.

[0166] In some embodiments, as shown in FIG. 16, the apparatus 1600 further includes:

[0167] A second sending unit 1603: sends an index of the first reference signal to a network device before the terminal device receives the first downlink control information.

[0168] In some embodiments, after the terminal device receives the first downlink control information, it means that the terminal device receives the last symbol of the first downlink control information 28 symbols later.

[0169] In some embodiments, the first transmitting unit 1601 transmits the first uplink control information in a primary cell (PCell or PSCell) or a secondary cell (SCell).

[0170] In some embodiments, the TRP is equivalent to at least one of a control resource set pool (CORESET pool) and a transmission configuration indication state (TCI state).

[0171] Although each component or module according to the present invention has been described above, the present invention is not limited thereto. The wireless communication device 1600 according to the embodiment of the present invention may further include other components or modules, and the specific contents of these components or modules can be found in the related art.

[0172] For convenience, Fig. 16 shows only the connection relationships or signal directions between each component or module, but various related technologies such as bus connection may be adopted as understood by those skilled in the art. Each of the above-mentioned components or modules may be realized by hardware such as a processor, a memory, a transmitter, a receiver, etc., but the implementation of the present invention is not limited thereto.

[0173] According to the embodiment of the present invention, in accordance with the embodiment of the second aspect, it is possible to improve the reliability of the system.

[0174] <Example of the sixth aspect> In an embodiment of the present invention, a wireless communication device is provided, which may be, for example, a network device, or may be one or more components or assemblies disposed in the network device. The principle of the device solving the problem is similar to that of the method of the embodiment of the third aspect, so that the specific implementation of the device can be referred to the implementation of the method of the embodiment of the third aspect, and the duplicated description of the same content will be omitted here.

[0175] 17 is a diagram showing an example of a wireless communication device according to the present embodiment. As shown in FIG 17, a wireless communication device 1700 according to the present embodiment includes the following.

[0176] A first sending unit 1701: sends configuration information to a terminal device, the configuration information configuring the terminal device to be associated with at least two TRPs; A receiving unit 1702: receiving second information of the terminal device transmission, the second information relating to an index of a first reference signal and / or an index of a TRP associated with the first reference signal; and A second sending unit 1703: determines the first reference signal according to the second information, and sends first downlink control information to the terminal device.

[0177] Thus, on the one hand, after receiving the above-mentioned first downlink control information, the terminal device can monitor the second downlink control information based on the antenna port QCL parameter that is the same as the antenna port QCL parameter associated with the first reference signal, where the first reference signal is associated with a first TRP among the at least two TRPs, the TRP associated with the second downlink control information and the first TRP associated with the first reference signal are the same, and the first reference signal is identified among at least one reference signal for beam recovery.

[0178] On the other hand, after receiving the above-mentioned first downlink control information, the terminal device can transmit first uplink control information according to a spatial filter and / or power for a first reference signal, where the first reference signal is associated with a first TRP among the at least two TRPs, the TRP associated with the first uplink control information and the first TRP associated with the first reference signal are the same, and the first reference signal is identified among at least one reference signal for beam recovery.

[0179] Although each component or module according to the present invention has been described above, the present invention is not limited thereto. The wireless communication device 1700 according to the embodiment of the present invention may further include other components or modules, and the specific contents of these components or modules can be found in the related art.

[0180] For convenience, Fig. 17 shows only the connection relationships or signal directions between each component or module, but various related technologies such as bus connection may be adopted as understood by those skilled in the art. Each of the above-mentioned components or modules may be realized by hardware such as a processor, a memory, a transmitter, a receiver, etc., but the implementation of the present invention is not limited thereto.

[0181] According to the embodiment of the present invention, the reliability of the system can be improved.

[0182] <Example of the seventh aspect> In an embodiment of the present invention, a communication system is provided, and Fig. 18 is a diagram showing the communication system 1800. As shown in Fig. 18, the communication system 1800 includes a network device 1801 and a terminal device 1802, and for convenience, Fig. 18 takes one terminal device and two network devices as an example for explanation. In addition, the network device is, for example, a TRP, but the embodiment of the present invention is not limited thereto.

[0183] In the embodiment of the present invention, conventional or future services may be transmitted between the network device 1801 and the terminal device 1802. For example, these services include, but are not limited to, eMBB, mMTC, URLLC, and V2X communication.

[0184] In some embodiments, the network device 1801 transmits configuration information to the terminal device 1802, where the configuration information configures the terminal device to be associated with at least two TRPs; receives second information transmitted by the terminal device 1802, where the second information is associated with an index of a first reference signal and / or an index of a first TRP; and determines the first reference signal based on the second information, and transmits first downlink control information based on the first reference signal, whereby the terminal device 1802 monitors the second downlink control information based on the same antenna port QCL parameter as the antenna port QCL parameter associated with the first reference signal, or transmits the first uplink control information based on the spatial filter and / or power related to the first reference signal. Note that for the relevant content of the network device 1801, reference may be made to the embodiments of the third aspect and the sixth aspect, and detailed descriptions thereof will be omitted here. For the relevant content of the terminal device 1802, reference may be made to the embodiments of the first aspect, the second aspect, the fourth aspect, and the fifth aspect, and detailed descriptions thereof will be omitted here.

[0185] An embodiment of the present invention further provides a terminal device, which may be, for example, a UE, but the present invention is not limited thereto and may be other devices.

[0186] Fig. 19 is a diagram showing a terminal device according to an embodiment of the present invention. As shown in Fig. 19, the terminal device 1900 may include a processor 1901 and a memory 1902, where the memory 1902 stores data and programs and is connected to the processor 1901. It should be noted that this diagram is merely an example, and the structure may be supplemented or replaced with other types of structures to achieve telecommunication functions or other functions.

[0187] For example, the processor 1901 may be configured to execute a program to implement the wireless communication method described in the embodiments of the first or second aspect.

[0188] As shown in Fig. 19, the terminal device 1900 may further include a communication module 1903, an input unit 1904, a display 1905, a power supply 1906, etc. Among them, the functions of these components are similar to those of the prior art, so detailed description thereof will be omitted here. It is not necessary for the terminal device 1900 to include all the components shown in Fig. 19. In addition, the terminal device 1900 may further include components not shown in Fig. 19, but the prior art can be referred to for this.

[0189] An embodiment of the present invention further provides a network device, which may be, for example, a TRP, but the present invention is not limited thereto and may be other network devices.

[0190] Fig. 20 is a diagram showing an example of a network device according to an embodiment of the present invention. As shown in Fig. 20, the network device 2000 may include a processor (e.g., a central processing unit CPU) 2001 and a memory 2002, and the memory 2002 is connected to the processor 2001. The memory 2002 can store various data and can also store programs for information processing, and can execute the programs under the control of the central processing unit 2001.

[0191] For example, the processor 2001 may be configured to execute a program to implement the wireless communication method described in the embodiment of the third aspect.

[0192] 20, the network device 2000 may further include a transceiver 2003, an antenna 2004, etc., among which the functions of these components are similar to those of the prior art, and therefore detailed description thereof will be omitted here. Note that the network device 2000 does not need to include all the components in FIG. 20. The network device 2000 may further include components not shown in FIG. 20, but the prior art can be referred to for this.

[0193] In an embodiment of the present invention, a computer readable program is further provided, which, when executed in a terminal device, causes a computer to perform a method according to an embodiment of the first or second aspect in the terminal device.

[0194] An embodiment of the present invention further provides a storage medium storing a computer readable program, wherein the computer readable program causes a computer to perform a method according to an embodiment of the first or second aspect in a terminal device.

[0195] An embodiment of the present invention further provides a computer readable program, which, when executed in a network device, causes a computer to perform a method according to an embodiment of the third aspect in the network device.

[0196] An embodiment of the present invention further provides a storage medium storing a computer readable program, wherein the computer readable program causes a computer to perform the method according to the embodiment of the third aspect in a network device.

[0197] The above-mentioned devices and methods may be realized by software or hardware, or may be realized by a combination of hardware and software. The present invention further relates to a computer-readable program as described below, which, when executed by a logic component, causes the logic component to realize the above-mentioned device or component, or causes the logic component to realize the above-mentioned various methods or steps. The logic component may be, for example, an FPGA (Field Programmable Gate Array), a microprocessor, a processor for use in a computer, etc. The present invention further relates to a storage medium, such as a hard disk, a magnetic disk, an optical hard disk, a DVD, a flash memory, etc., storing the above-mentioned program.

[0198] Additionally, one or more combinations of the functional blocks depicted in the figures and / or one or more combinations of the functional blocks may be implemented as a general purpose processor, a digital signal processor (DSP), an application specific integrated circuit (ASIC), a field programmable gate array (FPGA) or other programmable logic component, a discrete gate or transistor logic component, a discrete hardware assembly, or any other suitable combination for performing the functions described herein. Also, one or more combinations of the functional blocks depicted in the figures and / or one or more combinations of the functional blocks may be further configured as a combination of computing devices, such as a combination of a DSP and a microprocessor, a combination of multiple microprocessors, one or more microprocessors in communication with a DSP, or any other configuration.

[0199] Although the preferred embodiments of the present invention have been described above, the present invention is not limited to such embodiments, and any modifications to the present invention fall within the technical scope of the present invention as long as they do not depart from the spirit of the present invention.

[0200] Furthermore, with respect to the above-mentioned embodiments, the following supplementary notes are disclosed.

[0201] (Appendix 1) A wireless communication method applied to a terminal device, The terminal device is associated with at least two TRPs, and the method comprises: After the terminal device receives first downlink control information associated with a beam failure or a link failure, the terminal device monitors second downlink control information based on an antenna port QCL parameter that is the same as an antenna port QCL parameter associated with a first reference signal; the first reference signal is associated with a first TRP of the at least two TRPs; The TRP associated with the second downlink control information is the same as the first TRP associated with the first reference signal, A method, wherein the first reference signal is identified from among at least one beam recovery reference signal.

[0202] (Appendix 2) 2. The method according to claim 1, comprising: The method, wherein RRC signaling indicates that the first reference signal is associated with the first TRP.

[0203] (Appendix 2a) 3. The method according to claim 2, comprising: The RRC signaling indicates an ID of a TRP corresponding to the first reference signal.

[0204] (Appendix 2b) 3. The method according to claim 2, comprising: The RRC signaling is for indicating the first TRP.

[0205] (Appendix 3) 2. The method according to claim 1, comprising: The first reference signal is determined from at least one reference signal for beam recovery. A method, comprising: the first reference signal being identified from among candidate beam reference signals associated with the first TRP in a candidate beam reference signal list.

[0206] (Appendix 4) 2. The method according to claim 1, comprising: The first reference signal is determined from at least one reference signal for beam recovery. The method, wherein the first reference signal is identified from one candidate beam reference signal list for the first TRP.

[0207] (Appendix 5) 2. The method according to claim 1, comprising: The terminal device is associated with at least two TRPs. The method further comprising: configuring control resource sets (CORESETs) for the at least two TRPs in the terminal device.

[0208] (Appendix 6) 2. The method according to claim 1, comprising: The terminal device is associated with at least two TRPs. A method which indicates that a first control resource set and a second control resource set are configured in the terminal device in an active downlink BWP of a serving cell, CORESETPoolIndex is not configured in the first control resource set or a CORESETPoolIndex with a value of 0 is configured, and CORESETPoolIndex with a value of 1 is configured in the second control resource set.

[0209] (Appendix 7) 2. The method according to claim 1, comprising: The TRP associated with the second downlink control information and the first TRP associated with the first reference signal are the same, The method, wherein the second downlink control information is monitored in one control resource set (CORESET), and a TRP associated with the control resource set (CORESET) is the same as the first TRP.

[0210] (Appendix 8) The method according to claim 1, further comprising: A method in which the terminal device receives the first downlink control information based on an antenna port QCL parameter associated with the first reference signal.

[0211] (Appendix 9) 2. The method according to claim 1, comprising: The method, wherein the first downlink control information is associated with the first TRP.

[0212] (Appendix 9a) 10. The method according to claim 9, The first downlink control information is related to the first TRP. The method, wherein the first downlink control information is received in a BFR search space, and the BFR search space is associated with the first TRP.

[0213] (Appendix 9b) 10. The method according to claim 9, The first downlink control information is related to the first TRP. The method, wherein the first downlink control information is received in one control resource set, and the control resource set is associated with the first TRP.

[0214] (Appendix 10) 2. The method according to claim 1, comprising: Before receiving the first downlink control information, the method further comprises: A method comprising: the terminal device transmitting second information to a network device, the second information relating to an index of the first reference signal and / or an index of a TRP associated with the first reference signal.

[0215] (Appendix 11) 2. The method according to claim 1, comprising: The second downlink control information is monitored in one control resource set, and an index of the control resource set is 0.

[0216] (Appendix 12) 2. The method according to claim 1, comprising: After the terminal device receives the first downlink control information, A method, which indicates that the terminal device has received the last symbol of the first downlink control information 28 symbols later.

[0217] (Appendix 13) 2. The method according to claim 1, comprising: A method in which the terminal device monitors the second downlink control information in a primary cell (PCell or PSCell) or a secondary cell (SCell).

[0218] (Appendix 14) 14. The method according to any one of claims 1 to 13, comprising: The TRP is Control resource collection pool (CORESET pool); and Transmission Configuration Indication State (TCI state) A method that is equivalent to at least one of the following:

[0219] (Appendix 15) A wireless communication method applied to a terminal device, The terminal device is associated with at least two TRPs, and the method comprises: After the terminal device receives first downlink control information associated with a beam failure or a link failure, the terminal device transmits first uplink control information based on a spatial filter and / or a power for a first reference signal; the first reference signal is associated with a first TRP of the at least two TRPs; The TRP associated with the first uplink control information and the first TRP associated with the first reference signal are the same, A method, wherein the first reference signal is identified from among at least one beam recovery reference signal.

[0220] (Appendix 16) 16. The method of claim 15, The method, wherein RRC signaling indicates that the first reference signal is associated with the first TRP.

[0221] (Appendix 16a) 17. The method of claim 16, comprising: The RRC signaling indicates an ID of a TRP corresponding to the first reference signal.

[0222] (Appendix 16b) 17. The method of claim 16, comprising: The method, wherein the RRC signaling is RRC signaling for indicating the first TRP.

[0223] (Appendix 17) 16. The method according to claim 15, The first reference signal is determined from at least one reference signal for beam recovery. A method, comprising: the first reference signal being identified from among candidate beam reference signals associated with the first TRP in a candidate beam reference signal list.

[0224] (Appendix 18) 16. The method according to claim 15, The first reference signal is determined from at least one reference signal for beam recovery. The method, wherein the first reference signal is identified from one candidate beam reference signal list for the first TRP.

[0225] (Appendix 19) 16. The method according to claim 15, The terminal device is associated with at least two TRPs. The method further comprising: configuring control resource sets (CORESETs) for the at least two TRPs in the terminal device.

[0226] (Appendix 20) 16. The method according to claim 15, The terminal device is associated with at least two TRPs. A method which indicates that a first control resource set and a second control resource set are configured in the terminal device in an active downlink BWP of a serving cell, CORESETPoolIndex is not configured in the first control resource set or a CORESETPoolIndex with a value of 0 is configured, and CORESETPoolIndex with a value of 1 is configured in the second control resource set.

[0227] (Appendix 21) 16. The method of claim 15, The TRP associated with the first uplink control information and the first TRP associated with the first reference signal are the same, which refers to at least one of the following: A TRP associated with a control resource set for receiving DCI triggering the first uplink control information is the same as the first TRP; A reference signal for determining a spatial configuration corresponding to the first uplink control information is the same as a reference signal for detecting beam failure and / or determining a recovery candidate beam associated with the first TRP; and A method in which a TRP associated with a resource corresponding to the first uplink control information is the same as the first TRP.

[0228] (Appendix 21a) 22. The method according to claim 21, A method in which an ID of a TRP associated with a resource corresponding to the first uplink control information is indicated by RRC signaling.

[0229] (Appendix 22) 16. The method of claim 15, further comprising: The method includes the terminal device receiving the first downlink control information based on an antenna port QCL parameter associated with the first reference signal.

[0230] (Appendix 23) 16. The method of claim 15, The method, wherein the first downlink control information is associated with the first TRP.

[0231] (Appendix 23a) 24. The method according to claim 23, comprising: The first downlink control information is related to the TRP. The method, wherein the first downlink control information is received in a BFR search space, and the BFR search space is associated with the first TRP.

[0232] (Appendix 23b) 24. The method according to claim 23, comprising: The first downlink control information is related to the TRP. The method, wherein the first downlink control information is received in one control resource set, and the control resource set is associated with the first TRP.

[0233] (Appendix 24) 16. The method of claim 15, Before receiving the first downlink control information, the method further comprises: The method includes the terminal device transmitting second information to a network device, the second information relating to an index of the first reference signal and / or an index of a TRP associated with the first reference signal.

[0234] (Appendix 25) 16. The method of claim 15, The terminal device receives the first downlink control information, The method, which indicates that the terminal device has received the last symbol of the first downlink control information 28 symbols later.

[0235] (Appendix 26) 16. The method of claim 15, A method in which the terminal device transmits the first uplink control information in a primary cell (PCell or PSCell) or a secondary cell (SCell).

[0236] (Appendix 27) 27. The method according to any one of claims 15 to 26, comprising: The TRP is Control resource collection pool (CORESET pool); and Transmission Configuration Indication State (TCI state) A method that is equivalent to at least one of the following:

[0237] (Appendix 28) A terminal device including a storage device and a processor, The storage device stores a computer program, A terminal device, wherein the processor is configured to execute the computer program to implement the method according to any one of claims 1 to 27.

[0238] (Appendix 29) A communication system including a terminal device and a network device, A communication system, wherein the terminal device is configured to perform the method according to any one of claims 1 to 27.

Claims

1. A wireless communication device disposed in a terminal device, The terminal device is associated with at least two TRPs; The wireless communication device includes a monitor unit; The monitoring unit monitors second downlink control information based on an antenna port QCL parameter that is the same as an antenna port QCL parameter associated with a first reference signal after the terminal device receives first downlink control information associated with a beam failure or a link failure; the first reference signal is associated with a first TRP of the at least two TRPs; The TRP associated with the second downlink control information is the same as the first TRP associated with the first reference signal, A wireless communication device, wherein the first reference signal is identified from one candidate beam reference signal list for the first TRP.

2. 2. The wireless communication device according to claim 1, A wireless communication device, wherein the first reference signal is indicated by RRC signaling to be associated with the first TRP.

3. 3. The wireless communication device according to claim 2, The RRC signaling indicates an ID of a TRP corresponding to the first reference signal.

4. 3. The wireless communication device according to claim 2, A wireless communication device, wherein the RRC signaling is RRC signaling for indicating the first TRP.

5. 2. The wireless communication device according to claim 1, The terminal device is associated with at least two TRPs. The terminal device has a first control resource set and a second control resource set configured in an active downlink BWP of a serving cell, the first control resource set has no CORESETPoolIndex set or has a CORESETPoolIndex value of 0 set, and the second control resource set has a CORESETPoolIndex value of 1 set, indicating this wireless communication device.

6. 2. The wireless communication device according to claim 1, Further comprising a receiving unit; The receiving unit receives the first downlink control information based on an antenna port QCL parameter associated with the first reference signal.

7. 2. The wireless communication device according to claim 1, Further comprising a transmitting unit, A wireless communication device, wherein the transmitting unit transmits second information to a network device before the first downlink control information is received, and the second information is associated with an index of the first reference signal and / or an index of a TRP associated with the first reference signal.

8. 2. The wireless communication device according to claim 1, The TRP is A control resource set pool (CORESET pool); and Transmission Configuration Indication State (TCI state) A wireless communication device corresponding to at least one of the above.

9. 2. The wireless communication device according to claim 1, Further comprising a transmitting unit, A wireless communication device, wherein the transmitting unit transmits uplink control information, the uplink control information being associated with a first TRP of the at least two TRPs.

10. A wireless communication device configured in a terminal device, The terminal device is associated with at least two TRPs; The wireless communication device includes a first transmitting unit; The first transmitting unit transmits first uplink control information based on a spatial filter and / or a power for a first reference signal after the terminal device receives first downlink control information associated with a beam failure or a link failure; the first reference signal is associated with a first TRP of the at least two TRPs; A TRP associated with the first uplink control information and a first TRP associated with the first reference signal are the same, A wireless communication device, wherein the first reference signal is identified from one candidate beam reference signal list for the first TRP.

11. 11. The wireless communication device according to claim 10, A wireless communication device, wherein the first reference signal is indicated by RRC signaling to be associated with the first TRP.

12. 12. The wireless communication device according to claim 11, The device, wherein the RRC signaling is RRC signaling for indicating the first TRP.

13. 11. The wireless communication device according to claim 10, The TRP associated with the first uplink control information and the first TRP associated with the first reference signal are the same, a TRP associated with a control resource set for receiving a DCI triggering the first uplink control information is the same as the first TRP; A reference signal for determining a spatial configuration corresponding to the first uplink control information is the same as a reference signal for detecting beam failure and / or determining a recovery candidate beam associated with the first TRP; and The TRP associated with the resource corresponding to the first uplink control information is the same as the first TRP. The wireless communication device may include at least one of the following:

14. 11. The wireless communication device according to claim 10, Further comprising a receiving unit; The receiving unit receives the first downlink control information based on an antenna port QCL parameter associated with the first reference signal.

15. 11. The wireless communication device according to claim 10, Further comprising a second transmitting unit; A wireless communication device, wherein the second transmitting unit transmits second information to a network device before the first downlink control information is received, and the second information is associated with an index of the first reference signal and / or an index of a TRP associated with the first reference signal.

16. 11. The wireless communication device according to claim 10, The TRP is A control resource set pool (CORESET pool); and Transmission Configuration Indication State (TCI state) A wireless communication device corresponding to at least one of the above.

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