Method executed by user equipment and user equipment

Abstract

The invention provides a method executed by user equipment (UE) and the UE. The method comprises the following steps: when a triggered beam report BR exists for a serving cell, judging whether a beam failure report / beam failure recovery BFR is simultaneously detected for the serving cell; and cancelling the triggered BR or a scheduling request SR triggered by the triggered BR when it is determined that the BFR is detected simultaneously for the serving cell.

Description

Technical Field

[0001] The present invention relates to the technical field of wireless communications, and in particular to a method executed by a user equipment and the user equipment. Background Art

[0002] With the rapid growth of mobile communications and tremendous technological advances, the world is moving towards a fully interconnected networked society, where anyone and anything can access information and share data at any time and anywhere. It is estimated that by 2020, the number of connected devices will reach 50 billion, of which only approximately 10 billion will be mobile phones and tablets. The rest will be machines that communicate with each other, not with people. Therefore, how to design systems to better support the Internet of Everything is a topic that requires in-depth research.

[0003] To this end, the 3rd Generation Partnership Project (3GPP) RAN#64 plenary meeting, held in March 2016, proposed a research project on new 5G radio access technology (see non-patent document: RP-160671, "New SID Proposal: Study on New Radio Access Technology"). This project describes the new communication standard as having an operating frequency band extending up to 100 GHz and meeting at least the requirements of enhanced mobile broadband services, the communication needs of massive IoT users, and high-reliability services. The research work on this project is expected to conclude in 2018.

[0004] This research project plans to use beams and beamforming to transmit information. Specifically, when using high-frequency communication, to mitigate the rapid fading of high-frequency channels, a relatively thin beam is used. However, using a thin beam for information transmission is susceptible to external factors, such as the rotation of the phone and obstruction by other objects.

[0005] In beamforming transmission scenarios, the UE can proactively send beam signal quality information, referred to as beam reports, to the network to promptly report beam signal quality and changes. However, excessively transmitting these beam reports to the network can cause uplink congestion and waste uplink resources. Therefore, ensuring the transmission efficiency of triggered beam reports is a critical issue. Summary of the Invention

[0006] In order to solve the above problems, the present invention provides a method and user equipment executed by a user equipment, which can effectively control the cancellation of a triggered beam report BR or a scheduling request SR triggered by the BR, and the triggering of the BR when the secondary cell is activated.

[0007] According to the present invention, a method performed by a user equipment UE is proposed, comprising: when there is a triggered beam report BR for a serving cell, determining whether a beam failure report / beam failure recovery BFR is simultaneously detected for the serving cell; and in a case where it is determined that BFR is simultaneously detected for the serving cell, canceling the triggered BR or the scheduling request SR triggered by the triggered BR.

[0008] In addition, according to the present invention, a method performed by a user equipment UE is proposed, comprising: when a beam report BR is triggered due to an event for a serving cell, determining whether a condition for the event triggering the BR is no longer satisfied due to a change in a measurement result of the beam for the serving cell or a change in the beam currently used for transmission in the serving cell; and canceling the triggered BR if it is determined that the condition for the event triggering the BR is no longer satisfied.

[0009] In addition, according to the present invention, a method performed by a user equipment UE is proposed, including: when a secondary cell is deactivated, determining whether there is a triggered beam report BR associated with the secondary cell; and in the case where it is determined that there is a triggered BR associated with the secondary cell, canceling the BR associated with the secondary cell or the scheduling request SR triggered by the BR associated with the secondary cell.

[0010] Preferably, the method further comprises: pausing / suspending the use of configuration information related to BR detection; and instructing the lower layer not to perform or to stop link evaluation related to BR detection / link recovery.

[0011] In addition, according to the present invention, a method performed by a user equipment UE is proposed, including: when a secondary cell is activated, determining whether there is configuration information of a corresponding beam report BR for the secondary cell; and in the case where it is determined that there is configuration information of a corresponding BR for the secondary cell, performing at least one of the following operations: triggering a BR process; and performing measurements of relevant beams for the BR.

[0012] Preferably, the processing priority of the MAC control element generated for BR is lower than the processing priority of the MAC control element generated for beam failure reporting / beam failure recovery BFR.

[0013] In addition, according to the present invention, a user equipment is proposed, comprising: a processor; and a memory storing instructions, wherein the instructions execute the above method when executed by the processor.

[0014] Effects of the Invention

[0015] According to the present invention, it is possible to effectively control the cancellation of a triggered beam report BR or a scheduling request SR triggered by a BR, and the triggering of a BR when a secondary cell is activated. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] The above and other features of the present invention will become more apparent from the following detailed description taken in conjunction with the accompanying drawings, in which:

[0017] Figure 1 This is a flowchart showing a method executed by a user equipment UE according to the first embodiment of the present invention.

[0018] Figure 2 This is a flowchart showing a method executed by a user equipment UE according to the second embodiment of the present invention.

[0019] Figure 3 This is a flowchart showing a method executed by a user equipment UE according to embodiment 3 of the present invention.

[0020] Figure 4 This is a flowchart showing a method executed by a user equipment UE according to a fourth embodiment of the present invention.

[0021] Figure 5 is a block diagram schematically illustrating a user equipment involved in the present invention. DETAILED DESCRIPTION

[0022] The present invention is described in detail below with reference to the accompanying drawings and specific embodiments. It should be noted that the present invention is not limited to the specific embodiments described below. In addition, for the sake of simplicity, detailed descriptions of known technologies that are not directly related to the present invention are omitted to prevent confusion in understanding the present invention.

[0023] Before the detailed description, the following explanations are given for several terms mentioned in the present invention. Unless otherwise specified, the terms involved in the present invention have the following meanings.

[0024] UE User Equipment

[0025] RLF Radio Link Failure

[0026] NR New Radio Next Generation Wireless Technology

[0027] LTE Long Term Evolution

[0028] eLTE Enhaced Long Term Evolution

[0029] RRC Radio Resource Control (layer)

[0030] MAC Medium Access Control (layer)

[0031] MAC CE MAC Control Element MAC Control Element

[0032] PHY physical layer

[0033] PDCCH Physical Downlink Control Channel

[0034] RA Random Access

[0035] PRACH Physical Random Access Channel

[0036] SSB Synchronization Signal Block

[0037] CSI-RS Channel State Information Reference signal

[0038] TCI Transmission Configuration Indicator

[0039] RSRP Reference Signal Received Power Reference signal received power

[0040] Serving Cell: APCell, a PSCell, or an SCell, serving cell, which can be PCell, PSCell or SCell

[0041] SpCell: Special Cell, which can be PCell or PSCell.

[0042] PCell: Primary Cell

[0043] PSCell: Primary SCG Cell, primary SCG cell

[0044] SCell: Secondary Cell

[0045] SCG: Secondary Cell Group

[0046] C-RNTI: Cell RNTI, cell RNTI

[0047] RNTI: Radio Network Temporary Identifier, wireless network temporary identifier

[0048] HARQ: Hybrid Automatic Repeat Request

[0049] SINR: Signal to Noise and Interference Ratio, signal to noise and interference ratio

[0050] TRP: Transmit / Receive Point

[0051] UL-CCCH: Uplink Common Control Channel Uplink Common Control Channel

[0052] UCI: Uplink Control Information

[0053] MCG: Master Cell Group

[0054] SCG: Secondary Cell Group

[0055] SR: Scheduling Request

[0056] PHR: Power Heardroom Report, power margin report

[0057] BSR: Buffer Status Report, buffer status report

[0058] The following describes multiple embodiments of the present invention using an NR mobile communication system and its subsequent evolutionary versions as example application environments, and using NR-supported base stations and UE devices as examples. However, it should be noted that the present invention is not limited to the following embodiments, but is applicable to many other wireless communication systems, such as an eLTE communication system, and can also be applied to other base stations and UE devices, such as base stations and UE devices supporting eLTE.

[0059] Since a serving cell may include a primary cell and a secondary cell, the serving cell mentioned below may be either a primary cell or a secondary cell unless otherwise specified.

[0060] Beamforming can be used in conjunction with carrier aggregation (CA). A base station can configure multiple carriers for a UE, with different carriers corresponding to different serving cells. The multiple cells configured for a UE include at least one primary cell (Pcell) and one or more secondary cells (Scells). Both the primary and secondary cells can employ beamforming. Accordingly, by measuring the beam of each serving cell, the UE can report the beam quality of each cell.

[0061] A UE operating in dual connection (DC) mode is configured with an MCG and an SCG, where the primary cell of the MCG is called a Pcell and the primary cell of the SCG is called a PScell. SPcell is usually used to refer to Pcell and PScell.

[0062] Beam measurement and triggering of beam reports

[0063] The UE can measure the SSB or CSI-RS and use the measured L1-RSRP (Layer one-RSRP) value as the measurement quantity of the corresponding beam. It can also use the measured L1-SINR as the measurement quantity. Both L1-RSRP and L1-SINR can be regarded as the measurement results of beam measurement. Then, based on the measurement results, the UE can start or trigger one or more beam reports (Beam Report, BR) when one or more of the following events occur:

[0064] Event 1: The quality of the current beam falls below a preset threshold. Beam quality can be characterized by beam measurements or measurement results. The current beam may be the only beam currently used for transmission, also known as the active beam. Event 1 is considered to have occurred when the measurement result of the current beam falls below the preset threshold.

[0065] Event 2: At least one new beam has been detected, and its measured value, such as L1-RSRP, is higher than the measured value of the current beam by an offset value, and the offset value is at least a preset threshold. A new beam is different from the current operating beam used for transmission. Event 2 is considered to have occurred when at least one new beam that meets the above conditions appears.

[0066] Event 3: There is at least one new beam whose measurement value is higher than a preset threshold. In this case, event 3 is considered to have occurred.

[0067] Event 4: When the quality of the current beam is lower than the preset threshold 1 and the quality of at least one new beam is higher than the preset threshold 2, it can be considered that event 4 has occurred.

[0068] The preset thresholds in the above events may be different and are respectively used to determine the corresponding events.

[0069] When a UE detects at least one of the above events in a serving cell, it can trigger a beam reporting (beam reporting). If uplink resources are available, a BR MAC CE is generated. This BR MAC CE contains at least the beam report of the serving cell, which may include serving cell information, beam information, or corresponding measurement results. After the UE sends the BR MAC CE containing the serving cell beam report to the base station, the triggered BR is canceled. Because a triggered BR results in the generation of a BR MAC CE, an alternative to "triggering a BR" is "triggering a BR MAC CE," or an alternative to "there is a triggered BR" is "there is a triggered BR MAC CE." These terms are not further described below. Similarly, "canceling a triggered BR" can be replaced by "canceling a triggered BR MAC CE." By performing the "canceling" action, the UE no longer generates the corresponding BR MAC CE.

[0070] For example, on a Scell ​​A, for the beam configured for the Scell, the UE detects the above-mentioned event 1 (or event 1 occurs on Scell ​​A), then the UE can trigger a BR, which is associated with Scell ​​A, referred to as BR-A. When there is a triggered BR, in this example, it means that there is a BR-A, if the UE has available uplink resources, then the UE can instruct the multiplexing and assembly entity to generate a BR MAC CE. And send the generated BR MAC CE on the available uplink resources. This BR MAC CE can only contain beam information associated with Scell ​​A or related measurement results. After this BR MAC CE is sent, the UE can cancel the triggered BR-A.

[0071] Similarly, if the UE detects event 2 on a Pcell B for the beam configured for the Pcell, or event 1 occurs on Pcell B, the UE can trigger a BR. Such a BR is associated with Pcell B, referred to as BR-B.

[0072] Triggered BR-A and BR-B can exist at the same time. When the UE has available uplink resources, the UE can instruct the multiplexing and assembly entity to generate a BR MAC CE and send the generated BR MAC CE on the available uplink resources. This BR MAC CE can include beam information or related measurement results associated with Scell ​​A, and can also include beam information or related measurement results associated with Pcell B. After this BR MAC CE is sent, the UE can cancel the triggered BR-A and BR-B. If the uplink resources are small and insufficient to carry the beam information of two cells, the generated BR MAC CE can only include the beam information associated with Pcell B. Then, after the BR MAC CE is sent, the UE only cancels BR-B and continues to retain BR-A until BR-A is canceled. In order to enable the base station to know which cell or cells the measurement information contained in the BR MAC CE is for, the BR MAC CE can also include a cell identifier or cell index.

[0073] If the UE has no available uplink resources, it can trigger a scheduling request. This type of scheduling request is called a BR-triggered scheduling request. The purpose of a scheduling request is to request the network to allocate available uplink resources. Once the network allocates available uplink resources to the UE, the UE can instruct the multiplexing and assembly entity to generate a BR MAC CE and send the generated BFR MAC CE on the available uplink resources.

[0074] In addition to measuring the beam of a serving cell, the above-mentioned beam measurement can also be performed on a TRP. For example, if a serving cell is configured with multiple TRPs, and the beam of each TRP has its corresponding CSI-RS or SSB, then such beam measurement reflects the beam quality of the corresponding TRP. If the UE triggers a beam report based on the beam measurement result of the TRP, the BRMAC CE sent to the base station may include TRP information, such as the index or identifier of the TRP, so that the base station can distinguish its associated TRP.

[0075] Beam failure recovery of serving cell

[0076] For a serving cell using beamforming transmission, if beam failure detection (BFD) is configured for the serving cell, once the UE detects that the measurement result of the measurement reference signal corresponding to the Scell ​​(for example, the decoding error probability of the downlink control channel or the hypothetical error rate of the downlink control channel) becomes weak or exceeds a preconfigured threshold, or when the measured L1-RSRP falls below a configured threshold, the UE's physical layer will indicate this to the MAC layer. This type of indication is called a beam failure instance (BFI);

[0077] At the MAC layer, the UE uses the counter BFI_COUNTER to count the number of BFIs received for the serving cell. Each serving cell that needs to detect beam failure has a corresponding counter BFI_COUNTER:

[0078] Each time an indication is received, the detection timer beamFailureDetectionTimer will be started or restarted, and the BFI_COUNTER value will be increased by 1. Similarly, each serving cell that needs to detect beam failure has a corresponding detection timer beamFailureDetectionTimer;

[0079] When the value of BFI_COUNTER equals (or exceeds) a specific value, for example, the value of BFI_COUNTER is equal to the configured maximum BFI plus one (beamFailureInstanceMaxCount+1), or the value of BFI_COUNTER is greater than or equal to the configured maximum allowed BFI, the MAC layer determines the serving cell type and performs the corresponding operation based on the determination result:

[0080] If the serving cell is an Scell, the MAC layer triggers a beam failure report / beam failure recovery (BFR) process for the serving cell, referred to as triggering BFR. Essentially, when conditions are met (for example, BFI_COUNTER is greater than or equal to the maximum value), the UE begins performing operations related to beam failure reporting / beam failure recovery. These operations include reporting information related to the Scell's beam failure to the network and reporting information about possible candidate beams, such as identifiers or sequence numbers indicating candidate beams.

[0081] If the serving cell is not an Scell, which indicates that the serving cell is a Spcell, the MAC layer may initiate a random access procedure on the Spcell.

[0082] When the detection timer beamFailureDetectionTimer times out, the UE sets the BFI_COUNTER to an initial value (for example, the initial value of the BFI_COUNTER may be zero).

[0083] When BFR is triggered, if the UE has available uplink resources, the UE can instruct the multiplexing and assembly entity to generate a BFR MAC CE and send the generated BFR MAC CE on the available uplink resources.

[0084] If the UE does not have available uplink resources, it can trigger a scheduling request. This type of scheduling request is called a scheduling request triggered by BFR. The purpose of the scheduling request is to request the network to allocate available uplink resources. Once the network allocates available uplink resources to the UE, the UE can instruct the multiplexing and assembly entity to generate a BFR MAC CE and send the generated BFR MAC CE on the available uplink resources.

[0085] In a multi-TRP scenario, there can be multiple TRPs in a cell. The network can configure a reference signal or reference signal set for BFD and / or BFR for each TRP, which can be called the BFD / BFR configuration of each TRP or the BFD / BFR configuration dedicated to the TRP. These reference signals or reference signal sets may or may not overlap. Each reference signal set can be represented by an index, and each index corresponds to a TRP. When the UE detects that the downlink quality corresponding to a certain TRP is too low (as described above, or a new threshold value for judging link quality may be defined), the physical layer reports a beam failure instance indication to the MAC layer. The MAC layer determines whether a beam failure has occurred by whether the cumulative number of indications reaches the maximum value and whether the timer has expired, as described above. The beamFailureDetectionTimer and beamFailureInstanceMaxCount of different TRPs may be configured with different values, or they may be configured with the same value (multiple TRPs correspond to one parameter value, or each TRP is configured with two sets of parameters and the two sets of parameter values ​​are equal). To support separate processing for each TRP, a BFI COUNTER variable, used to count the number of beam failure indications, is also configured for each TRP. The UE can detect the reference signal set for BFD and / or BFR corresponding to the TRP to identify candidate reference signals in the event of a beam failure. When the MAC determines that a beam failure has occurred, it initiates a BFR process for the TRP. This process can be implemented by sending a MAC CE.

[0086] Hereinafter, several embodiments of the present invention will be described in detail with reference to the accompanying drawings.

[0087] Example 1

[0088] Figure 1 This is a flowchart showing a method executed by a user equipment UE according to the first embodiment of the present invention.

[0089] like Figure 1 As shown, the method includes the following steps:

[0090] In step 101, when a triggered BR exists for a serving cell, it is determined whether a BFR is detected for the serving cell at the same time.

[0091] In step 102, when it is determined that a BFR is detected for the serving cell at the same time, the triggered BR or (if any) the SR triggered by the triggered BR is canceled.

[0092] Specific operations can be:

[0093] For a serving cell, when an event that can trigger a BR occurs on the serving cell, such as at least one of the aforementioned events 1-4, if there is no associated BFR for the cell, or if the BFR has not been triggered for the cell, the UE triggers a BR for the serving cell. (This is to determine whether a BFR exists before triggering a BR.)

[0094] Specific operations can also be:

[0095] For a serving cell, if the value of the BFI_COUNTER associated with the cell is equal to (or exceeds) a specific value, for example, the value of the BFI_COUNTER is equal to the configured maximum BFI plus one (beamFailureInstanceMaxCount+1), or the value of the BFI_COUNTER is greater than or equal to the configured maximum allowed BFI, then if the serving cell is an Scell, a BFR is triggered for the cell, and optionally, if a triggered BR exists in the serving cell, the BR is canceled; if the serving cell is not an Scell, a random access procedure is initiated on the Spcell, and optionally, if a triggered BR exists in the serving cell, the BR is canceled. (This is after the BFR is triggered, it is determined whether there is a triggered BR, and if so, the previously triggered BR is canceled.)

[0096] Example 2

[0097] Figure 2 This is a flowchart showing a method executed by a user equipment UE according to the second embodiment of the present invention.

[0098] like Figure 2 As shown, the method includes the following steps:

[0099] In step 201, when a BR is triggered in a service cell of the UE due to a certain event, it is determined whether the condition for the event triggering the BR is no longer met due to a change in the measurement result of the beam of the service cell or a change in the beam currently used for transmission in the service cell.

[0100] In step 202, when it is determined that the condition of the event triggering the BR is no longer satisfied, the UE cancels the corresponding triggered BR.

[0101] For example, in one case, the transmission quality of the beam (beam A) currently used for transmission in the serving cell decreases, that is, event 1 occurs, then a BR-A can be triggered for the serving cell. Before the BR is canceled, the measurement value of the beam currently used for transmission increases, for example, the corresponding L1-RSRP value increases, preferably, it exceeds a pre-configured threshold value 2, then the UE can cancel the triggered BR, specifically, the UE's PHY indicates the increase in the signal measurement value to the MAC layer, or indicates the cancellation of the triggered BR; based on the indication, the MAC layer cancels the corresponding BR. Alternatively, when the MAC layer learns of this event change, that is, the event that triggered the BR is no longer valid, the corresponding BR is canceled.

[0102] In another case, if the beam currently used for transmission changes, the UE may also cancel the triggered BR. For example, after BR-A is triggered and not canceled, the UE may receive information from the base station indicating the TCI state, such as a TCI state indication MAC CE or a DCI indicating a TCI state change. Preferably, the UE receives a TCI state indication MAC CE (Indication of TCI state for UE-specific PDCCH MAC CE) for the PDCCH indicating that the beam currently used for transmission has switched or changed from beam A to beam B. If BR-A, which was triggered because the measurement value of beam A is lower than the threshold, has not been canceled, the UE may cancel the triggered BR-B. Specifically, the UE's PHY may indicate cancellation of the triggered BR; based on this indication, the MAC layer cancels the corresponding BR, or the MAC layer may cancel the corresponding BR upon learning of this event change, i.e., the event that triggered the BR is no longer valid. Alternatively, the MAC layer may cancel the triggered BR-B based on the received TCI state information when the working beam changes.

[0103] For example, in one case, event 2 occurs on the serving cell, triggering a BR-X. Before the BR is canceled, if the measurement value of the new beam X decreases and no longer meets the requirements of event 2, the UE can cancel the triggered BR-X. Specifically, the UE's PHY may indicate to the MAC layer that the measurement value of beam X has decreased, or instruct the cancellation of the triggered BR-X. Alternatively, when the MAC layer learns of this event change, the event that triggered the BR is no longer valid, thereby canceling the corresponding BR.

[0104] In another case, the beam currently used for transmission may have changed. After triggering the above-mentioned BR-X, the UE may receive information from the base station indicating the TCI state, such as a TCI state indication MAC CE or a DCI indicating a TCI state change. Preferably, the UE receives a TCI state indication MAC CE (Indication of TCI state for UE-specific PDCCH MAC CE) for PDCCH indicating that the beam currently used for transmission has switched (switch) or changed (change) from beam A to beam X. If the BR-X triggered because the measurement value of beam X is higher than the threshold value is not canceled, the UE may cancel the triggered BR-X. Alternatively, it may indicate that the beam currently used for transmission has switched (switch) or changed (change) from beam A to beam B. Compared with the current beam B, beam X no longer meets the requirements of event 2, so the triggered BR-X may be canceled.

[0105] This embodiment can also be implemented independently to determine under what circumstances to cancel a triggered BR.

[0106] In addition, embodiments 1 and 2 can also be used to cancel BRs triggered by TRP-associated or configured beam measurements.

[0107] In addition, in order to solve the problem of how to process the BR triggered when the Scell ​​is deactivated and the SR triggered by the BR, the solution described in the third embodiment or the fourth embodiment can be adopted.

[0108] Example 3

[0109] Figure 3 This is a flowchart showing a method executed by a user equipment UE according to embodiment 3 of the present invention.

[0110] In step 301, when a Scell ​​is deactivated, it is determined whether there is a triggered beam report BR associated with the secondary cell.

[0111] In step 302, if it is determined that there is a triggered BR associated with the Scell, the BR or (if there is) the scheduling request SR triggered by the BR associated with the Scell ​​is cancelled.

[0112] Optionally, you can also pause / suspend the use of BR detection related configuration information; and

[0113] Instruct the lower layer (preferably, the lower layer is the physical layer) not to perform or to stop link evaluation related to BR detection / link recovery.

[0114] The BR associated with the Scell ​​means that a BR is triggered on a Scell, and the triggered BR is associated with the Scell.

[0115] Accordingly, a BR associated with the Scell ​​may trigger an SR, and this SR may be referred to as an "SR associated with this BR" or an "SR associated with the Scell", where the Scell ​​is associated with the BR that triggers the SR.

[0116] The so-called BR cancellation here may mean that when BR is triggered, but the UE has not yet instructed the multiplexing and assembly entity to generate a BR MAC CE, or has not yet packaged the BR MAC CE into a MAC PDU, if the associated Scell ​​is deactivated, then the UE does not need to instruct the generation of a BR MAC CE or does not need to send the already generated BR MAC CE.

[0117] The so-called cancellation of SR means that when BR triggers SR, but the UE has not instructed the physical layer to send SR on the PUCCH opportunity, or the opportunity to send PUCCH has not arrived, if the associated Scell ​​is deactivated, then the UE does not need to instruct to send SR again.

[0118] The Scell ​​can be deactivated in the following ways:

[0119] 1- Carrying information elements in the RRC reconfiguration message or RRC resume message to indicate that the state / operation corresponding to the Scell ​​is deactivated;

[0120] 2-UE receives SCell Activation / Deactivation MAC CE, indicating that the Scell ​​is deactivated;

[0121] 3-The deactivation timer sCellDeactivationTimer associated with the SCell times out, and the SCell is deactivated. When the SCell is activated, its corresponding deactivation timer sCellDeactivationTimer is started.

[0122] Example 4

[0123] The fourth embodiment is based on the third embodiment.

[0124] Figure 4 This is a flowchart showing a method executed by a user equipment UE according to a fourth embodiment of the present invention.

[0125] In step 401, when a Scell ​​is activated, it is determined whether there is corresponding BR configuration information for the Scell.

[0126] In step 402, if there is corresponding BR configuration information for the Scell, at least one of the following operations is performed:

[0127] 1- Triggering the BR process; and

[0128] 2- Perform measurements of the relevant beams for BR.

[0129] Scell ​​can be activated in the following ways:

[0130] 1- Carrying information elements in the RRC reconfiguration message or RRC resume message to indicate that the state / operation corresponding to the Scell ​​is activated;

[0131] 2-UE receives SCell Activation / Deactivation MAC CE, indicating that the Scell ​​is activated.

[0132] Embodiments 1 to 3 can be used in combination to cancel a triggered BR, or can be used individually.

[0133] Example 5

[0134] Based on the above embodiment, for the generated BR MAC CE, the MAC entity sets a processing priority for the BR MAC CE when multiplexing and assembling MAC PDUs, specifically, the multiplexing and assembling processing priority.

[0135] A MAC PDU can contain one or more MAC CEs, as well as data from various logical channels. The size of the MAC PDU is fixed (determined by the UL grant received by the UE). In a limited MAC PDU, if the UE has multiple MAC CEs to transmit, it is necessary to prioritize these MAC CEs to determine which MAC CE(s) should be included first in the MAC PDU, and then which MAC CE(s) should be included when there is space left. In other words, the UE determines the order in which MAC CEs are allocated in the MAC PDU space based on a certain processing priority.

[0136] In the existing mechanism, a UE may have a MAC CE for C-RNTI (carrying C-RNTI), a MAC CE for BFR (carrying Beam Failure Recovery), a MAC CE for BSR (carrying Buffer Status Report), a MAC CE for PHR (carrying Power Headroom Report), and data from non-UL-CCCH logical channels that need to be transmitted. When generating a MAC PDU, the UE first considers placing the MAC CE for C-RNTI, then if there is remaining space, the MAC CE for BFR, then the MAC CE for BSR, and finally the MAC CE for PHR. If there is remaining space, data from any logical channel other than UL-CCCH is placed.

[0137] It can be seen that the processing priority of these MAC CEs is: MAC CE for C-RNTI is higher than MAC CE for BFR, MAC CE for BFR is higher than MAC CE for BSR, MAC CE for BSR is higher than MAC CE for PHR, and the priority of these MAC CEs is higher than the data from non-UL-CCCH logical channels. Their processing order is:

[0138] -MAC CE for C-RNTI;

[0139] -MAC CE for BFR;

[0140] -MAC CE for BSR;

[0141] -MAC CE for PHR;

[0142] -Data from non-uplink common control channels

[0143] In the above embodiment, a new MAC CE is defined for transmitting the BR MAC CE, which can be called the BR-specific MAC CE. When this MAC CE is generated, one possible order is as follows: the processing priority of the BR-specific MAC CE is lower than the BFR-specific MAC CE, but higher than the BSR-specific MAC CE and the PHR-specific MAC CE, as well as data from non-uplink common control channels:

[0144] -MAC CE for C-RNTI;

[0145] -MAC CE for BFR

[0146] -MAC CE for BR;

[0147] -MAC CE for BSR;

[0148] -MAC CE for PHR;

[0149] -Data from non-uplink common control channels

[0150] In the above scheme, the processing priority of the MAC CE for BR is always lower than that of the MAC CE for BFR. Considering that BR and BFR are triggered for a certain serving cell, another possible operation is to determine the priority order according to the type of serving cell that triggers the BR or BFR.

[0151] In one case, the BR is triggered by an event on a Spcell, that is, the BR is considered to be associated with the Spcell, and the BFR is triggered on a Scell, that is, the BFR is considered to be associated with the Scell. In this case, the MAC CE for the BR associated with the Spcell can be considered to have a higher priority than the MAC CE for the BFR associated with the Scell.

[0152] In another case, if the triggered BR is associated with a Scell ​​and the triggered BFR is associated with a Spcell, the MAC CE for the Scell-associated BR can be considered to have a lower or no higher priority than the MAC CE for the Spcell-associated BFR. If the priority of one is not higher than the other, the two priorities can be considered equal, and the UE can decide the processing order.

[0153] In another case, the triggered BR is associated with a Spcell, and the triggered BFR is also associated with the same Spcell, or the triggered BR and the triggered BFR are associated with the same TRP in the Spcell, then it can be considered that:

[0154] The priority of the MAC CE for the BR associated with the Spcell is lower than or not higher than the MAC CE for the BFR associated with the same Spcell;

[0155] The priority of a MAC CE for a BR associated with one of the TRPs of the Spcell is lower than or not higher than the priority of a MAC CE for a BFR associated with the same TRP.

[0156] In the case where the priority of the BR is not higher than that of the other BR, the priorities of the BR and the other BR are considered equal, and the UE can make the decision on its own. Alternatively, as shown in Example 1, the triggered BR can be canceled.

[0157] Example 6

[0158] In the aforementioned embodiment, when the aforementioned event occurs, the UE triggers a BR, which is then reported to the base station via a BRMAC CE. During this process, the UE must wait for uplink resources to be allocated for transmitting the BRMAC CE, potentially introducing latency. In existing technologies, the UE can send UCI on pre-allocated resources. The UCI includes beam measurement information. This is the fastest method, but the content that the UCI can carry is limited. If the content is too large, more resources must be pre-allocated, resulting in resource waste.

[0159] In order to solve the above problems caused by adopting a single reporting method, a possible implementation method may be that when the above events occur, the UE can report the BR according to the type of event. For example:

[0160] In one case, when event 1 occurs in the serving cell (or event 1 is detected on the serving cell), the UE may indicate that event 1 has occurred in the current beam through UCI in the PHY, or perform measurement values ​​of the current beam. Based on the received measurement values, the base station may compare them with the threshold to determine that event 1 has occurred in the serving cell.

[0161] In another case, event 2 occurs in the serving cell. The UE's PHY can indicate to the MAC layer that event 2 has occurred, thereby triggering a BR for the serving cell at the MAC layer, and then reporting the new beam information, such as identification information and measurement result information, to the base station through the BR MAC CE.

[0162] Alternatively, the UE can determine how to report the BR based on the configured information. For example, if the UE is configured to enable the BR MAC CE reporting method, the UE can trigger the BR when the aforementioned event occurs and then report using the BR MAC CE method. If the UE is configured to disable the BR MAC CE reporting method, the UE always reports beam information using the UCI method.

[0163] Alternatively, the aforementioned reporting of BR based on event type can be combined. When the UE is configured to enable BR MAC CE reporting, the UE can choose to use BR MAC CE reporting or UCI reporting based on the event type. If the UE is configured to disable BR MAC CE reporting, the UE always uses UCI to report beam information.

[0164] Or if the UE is configured to enable the UE-triggered UCI reporting method, the UE can use the UCI method to report the beam information when the above-mentioned event occurs; if the UE is configured to disable the UE-triggered UCI reporting method, the UE always uses the BR MAC CE method to report the beam information.

[0165] Alternatively, the aforementioned reporting of BR based on event type can be combined. When the UE is configured to enable UE-triggered UCI reporting, the UE can choose to use BR MAC CE reporting or UCI reporting based on the event type. If the UE is configured to disable UE-triggered UCI reporting, the UE always uses BR MAC CE to report beam information.

[0166] Example 7

[0167] Based on the above embodiment, when generating a BR MAC CE, time-related information may also be included in the BR MAC CE. This information can include the time information when the event triggering the BR occurred, such as an absolute time indication or specific instant information, or a relative time indication, such as the frame number or timeslot number corresponding to the instant of occurrence. This information can also include the number of the current BR MAC CE relative to the previously triggered BR or the previously reported BR MAC CE. For example, if the previous BR MAC CE is numbered X, the current BR MAC CE is numbered X+1, where X can be an integer, for example, from 0 to 7. If the previous BR MAC CE is numbered 7, then the current BR MAC CE is numbered 0. The numbers allow the base station to identify the order of BR MAC CEs upon receiving them, i.e., the time order of their reporting. This time-related information can be included in the BR MAC CE along with the event information.

[0168] When a BR MAC CE contains multiple BR-triggering events and their corresponding reports, the UE can provide time information for each event, for example, in a list format. Alternatively, the UE can provide time information implicitly, for example, by arranging the BRs for earlier events first and later events last, and vice versa. In other words, the UE arranges the report contents in the order of the events' occurrence.

[0169] This embodiment can also be implemented independently to identify the time information of the BR MAC CE, so that the base station can discard the expired BR in time to avoid misjudgment.

[0170] [Modification]

[0171] Figure 5is a block diagram schematically illustrating a user equipment involved in the present invention.

[0172] like Figure 5 As shown, the user equipment 500 includes at least a processor 501 and a memory 502. The processor 501 may include, for example, a microprocessor, a microcontroller, an embedded processor, etc. The memory 502 may include, for example, a volatile memory (such as a random access memory (RAM), a hard disk drive (HDD), a non-volatile memory (such as a flash memory), or other memory systems. The memory 502 stores program instructions. When executed by the processor 501, the instructions may perform one or more steps of the UE processing method disclosed herein.

[0173] The program running on the device according to the present invention can be a program that controls the central processing unit (CPU) to enable the computer to implement the functions of the embodiments of the present invention. The program or the information processed by the program can be temporarily stored in a volatile memory (such as a random access memory RAM), a hard disk drive (HDD), a non-volatile memory (such as a flash memory), or other memory systems.

[0174] The program for realizing each embodiment of the present invention function can be recorded on a computer-readable recording medium. Can realize corresponding function by making a computer system read the program recorded on the recording medium and executing these programs. So-called "computer system" herein can be the computer system embedded in the device, can include operating system or hardware (such as peripheral device). "Computer-readable recording medium" can be a semiconductor recording medium, an optical recording medium, a magnetic recording medium, a short-term dynamic storage program recording medium or any other recording medium that is computer-readable.

[0175] The various features or functional modules of the devices used in the above embodiments can be implemented or executed by circuits (e.g., single-chip or multi-chip integrated circuits). The circuits designed to perform the functions described in this specification may include a general-purpose processor, a digital signal processor (DSP), an application-specific integrated circuit (ASIC), a field-programmable gate array (FPGA), or other programmable logic devices, discrete gate or transistor logic, discrete hardware components, or any combination of the above devices. The general-purpose processor may be a microprocessor, or any existing processor, controller, microcontroller, or state machine. The above circuits may be digital circuits or analog circuits. In the event that new integrated circuit technologies have emerged to replace existing integrated circuits due to advances in semiconductor technology, one or more embodiments of the present invention may also be implemented using these new integrated circuit technologies.

[0176] Furthermore, the present invention is not limited to the above-described embodiments. Although various examples of the embodiments have been described, the present invention is not limited thereto. Fixed or non-mobile electronic devices installed indoors or outdoors can be used as UE devices or communication devices, such as AV equipment, kitchen equipment, cleaning equipment, air conditioners, office equipment, vending machines, and other household appliances.

[0177] As described above, embodiments of the present invention have been described in detail with reference to the accompanying drawings. However, the specific structure is not limited to the above-described embodiments, and the present invention also includes any design changes that do not deviate from the main purpose of the present invention. In addition, various modifications can be made to the present invention within the scope of the claims, and embodiments obtained by appropriately combining the technical means disclosed in different embodiments are also included in the technical scope of the present invention. In addition, components with the same effect described in the above embodiments can be replaced with each other.

Claims

1. A method performed by a user equipment (UE), comprising: When there is a triggered beam report BR for the serving cell, determining whether a beam failure report / beam failure recovery BFR is simultaneously detected for the serving cell; as well as In a case where it is determined that a BFR is detected simultaneously for the serving cell, the triggered BR or the scheduling request SR triggered by the triggered BR is canceled.

2. A method performed by a user equipment (UE), comprising: When a beam report BR is triggered for a serving cell due to an event, determining whether the condition for the event triggering the BR is no longer met due to a change in the measurement result of the beam for the serving cell or a change in the beam currently used for transmission by the serving cell; as well as When it is determined that the condition of the event that triggered the BR is no longer satisfied, the triggered BR is canceled.

3. A method performed by a user equipment (UE), comprising: When the secondary cell is deactivated, determining whether there is a triggered beam report BR associated with the secondary cell; as well as If it is determined that there is a triggered BR associated with the secondary cell, the BR associated with the secondary cell or the scheduling request SR triggered by the BR associated with the secondary cell is canceled.

4. The method according to claim 3, further comprising: Pause / suspend the use of BR detection related configuration information; as well as Instructs the lower layer not to perform or stop link evaluation related to BR detection / link recovery.

5. A method performed by a user equipment (UE), comprising: When the secondary cell is activated, determine whether there is corresponding beam reporting BR configuration information for the secondary cell; as well as If it is determined that corresponding BR configuration information exists for the secondary cell, at least one of the following operations is performed: The process of triggering BR; and Measurements of relevant beams for BR are performed.

6. The method according to any one of claims 1 to 5, wherein: The processing priority of the MAC control element generated for BR is lower than the processing priority of the MAC control element generated for beam failure report / beam failure recovery BFR.

7. A user equipment, comprising: processor; as well as Memory, which stores instructions, The instructions, when executed by the processor, perform the method according to any one of claims 1 to 6.

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