Event triggered beam reporting method and apparatus

Abstract

Methods, systems, and devices are described for wireless communication. A method of wireless communication includes determining, by a wireless device, whether an event for a beam report has occurred based on a rule. Upon determining that the event for the beam report has occurred, the wireless device triggers a beam report transmission from the wireless device to a network device.

Description

Technical Field

[0001] This patent document relates to wireless communication. Background Technology

[0002] Mobile communication technology is propelling the world into an increasingly interconnected and networked society. The rapid development and technological advancements in mobile communications are driving ever-increasing demands for capacity and connectivity. Other factors, such as energy consumption, equipment cost, spectrum efficiency, and latency, are also crucial for meeting the needs of various communication scenarios. Various technologies, including new approaches to providing higher service quality, longer battery life, and improved performance, are being discussed. Summary of the Invention

[0003] This patent document describes technologies such as those used for beam management.

[0004] In one aspect, a wireless communication method is disclosed. The method includes: a wireless device determining, based on rules, whether an event for beam reporting has occurred, and, upon determining that the event for beam reporting has occurred, triggering beam reporting transmission from the wireless device to a network device.

[0005] In another aspect, a wireless communication method performed by a network device is disclosed. The method includes: receiving a beam report transmission from a wireless device by the network device, wherein the beam report is determined by the wireless device based on rules by determining whether an event for the beam report has occurred; and performing further wireless communication operations based on the beam report received from the wireless device.

[0006] In another exemplary aspect, a wireless communication device is disclosed, including a processor configured to implement the methods described above.

[0007] In another exemplary aspect, a computer storage medium is disclosed having code stored thereon for implementing the methods described above by one or more processors.

[0008] These and other aspects are described in this document. Attached Figure Description

[0009] Figure 1 Examples of wireless communication systems based on some exemplary embodiments of the disclosed technology are shown.

[0010] Figure 2 This is a block diagram representation of a portion of an apparatus based on some embodiments of the disclosed technology.

[0011] Figure 3 This is a block diagram of an example of an event-triggered implementation.

[0012] Figure 4This is a block diagram of an example of an event-triggered implementation.

[0013] Figure 5 This is a flowchart of an exemplary method for wireless communication.

[0014] Figure 6 This is a flowchart of an exemplary method for wireless communication. Detailed Implementation

[0015] The section headings used in this document are for ease of understanding only and do not limit the scope of the embodiments to the sections described. Furthermore, while the embodiments are described with reference to 5G examples, the disclosed techniques can be applied to wireless systems using protocols other than 5G or the 3rd Generation Partnership Project (3GPP) protocols.

[0016] In some embodiments, "beam state" may be equivalent to quasi-co-located (QCL) state, transmit configuration indicator (TCI) state, spatial relation (also known as spatial relation information), reference signal (RS), spatial filter, or precoding. In some embodiments, "beam state" may be simply referred to as "beam". Specifically: - (1) In various embodiments, “Tx beam” can be equivalent to QCL state, TCI state, spatial relation state, DL / UL reference signal (e.g., Channel State Information Reference Signal (CSI-RS), Synchronization Signal Block (SSB) (also known as SS / PBCH), Demodulation Reference Signal (DMRS), Probe Reference Signal (SRS) and Physical Random Access Channel (PRACH)), Tx spatial filter or Tx precoding; - (2) In some embodiments, “Rx beam” may be equivalent to QCL state, TCI state, spatial relation state, spatial filter, Rx spatial filter or Rx precoding; - (3) In some embodiments, “beam ID” may be equivalent to QCL state index, TCI state index, spatial relationship state index, reference signal index, spatial filter index or precoding index.

[0017] In some embodiments, the spatial filter may be on the UE side or the gNB side, and the spatial filter is also referred to as a spatial domain filter.

[0018] In some embodiments, “spatial relationship information” consists of one or more reference RSs, which represent the same or quasi-co-located “spatial relationship” between the target “RS or channel” and the one or more reference RSs. In some embodiments, “beam state” is associated with or consists of one or more reference RSs and / or their corresponding QCL type parameters, wherein the QCL type parameters include at least one of the following aspects or combinations: [1] Doppler spread, [2] Doppler frequency shift, [3] time delay spread, [4] average time delay, [5] average gain and [6] spatial parameters. In some embodiments, “TCI state” is equivalent to “beam state”. In some embodiments, “spatial parameter” is equivalent to spatial parameter, spatial Rx parameter or spatial filter. In this patent, “QCL-TypeA”, “QCL-TypeB”, “QCL-TypeC” and “QCL-TypeD” have the following definitions.

[0019] 'QCL-TypeA': {Doppler frequency shift, Doppler spread, average delay, delay spread} 'QCL-TypeB': {Doppler frequency shift, Doppler spread} 'QCL-TypeC': {Doppler shift, average delay} 'QCL-TypeD': {space Rx parameter} In various embodiments, the "UL channel" can be either PUCCH or PUSCH.

[0020] In various embodiments, the "DL channel" can be either PDCCH or PDSCH.

[0021] In various embodiments, “UL RS” can be SRS, PRACH, DMRS (e.g., DMRS for PUSCH or PUCCH).

[0022] In various embodiments, “DL RS” can be SSB, CSI-RS, DMRS (e.g., DMRS for PDSCH or PDCCH).

[0023] In various embodiments, a “UL signal” can be a UL channel or a UL RS (e.g., SRS, PRACH, DMRS, PUSCH, or PUCCH).

[0024] In various embodiments, the “DL signal” can be a DL channel or a DL RS (SSB, CSI-RS, DMRS, PDSCH, or PDCCH).

[0025] In various embodiments, a “time unit” can be a sub-symbol, symbol, time slot, subframe, frame, or transmission opportunity.

[0026] In various embodiments, the power control parameters include the target power (also referred to as P0), path loss RS, a scaling factor for path loss (also referred to as alpha), or a closed-loop process. The path loss may be coupling loss.

[0027] In various embodiments, "DCI" is equivalent to "PDCCH".

[0028] In various embodiments, "precoded information" is equivalent to PMI, TPMI, precoding, or beamforming.

[0029] In various embodiments, "TRP" is equivalent to RS port, RS port group, RS resource, or RS resource set.

[0030] In some embodiments, "port group" is equivalent to antenna group or UE port group.

[0031] The following abbreviations are used in this document.

[0032]

[0033] The following headings disclose various embodiments. While disclosed as separate embodiments, it should be understood that the techniques described in one embodiment can also be used in conjunction with other techniques described in another embodiment. The headings regarding the embodiments are for readability purposes only and are not intended to limit the scope of the technology.

[0034] New Radio (NR) is a new wireless access technology developed by the 3rd Generation Partnership Project (3GPP) as a standard for the air interface of wireless networks. One of the key features of NR is its support for high-frequency bands. While high-frequency bands offer abundant frequency domain resources, wireless signals attenuate rapidly, significantly limiting the coverage of signals operating in these bands. To mitigate these adverse effects, beamforming is implemented, which concentrates energy within a relatively small spatial area, thereby improving high-frequency band coverage. Both users and base stations need to adjust their beams and achieve precise alignment during initial access and data transmission to ensure maximum gain. 3GPP has developed a set of beam management procedures for adjusting beam direction and maintaining appropriate transmit and receive beam pairs in high-frequency bands, including beam scanning, beam measurement, beam reporting, and beam indication.

[0035] In the current specification, the UE is configured with at least one resource setting for channel measurements and at least one reporting setting for CSI reporting. Each reporting setting contains parameters for a CSI reporting band and CSI-related quantities to be reported by the UE. For beam management, the CSI-related quantities to be reported by the UE primarily include the CSI-RS Resource Indicator (CRI), SS / PBCH Block Resource Indicator (SSBRI), L1-RSRP, or L1-SINR. More specifically, the higher-layer parameters for configuring the reporting quantities can be set to 'cri-RSRP', 'cri-SINR', 'ssb-Index-RSRP', and 'ssb-Index-SINR'. For example, if the higher-layer parameter is set to 'cri-RSRP', the UE should report one or more CRIs and associated L1-RSRPs in a single report for each reporting setting, where the number of RS resources to be reported is configured by the higher layer. Note that the UE should derive the CSI parameters other than the resource indicator (i.e., CRI / SSBRI) under the condition of the reported resource indicator (i.e., CRI / SSBRI), where the resource indicator k (k≥0) corresponds to the (k+1)th entry of the associated resource configured in the corresponding resource set used for channel measurement.

[0036] Differential-based reporting methods are used for L1-RSRP and L1-SINR reporting. For example, for L1-RSRP reporting, if the number of RS resources to be reported per reporting setting is configured to 1, the reported L1-RSRP value is defined by a 7-bit value with a 1dB step size in the range of [-140, -44] dBm. If the number of measured RS resources to be reported per reporting setting is configured to be greater than 1, the UE should use differential L1-RSRP-based reporting, where the maximum value of the measured L1-RSRP is quantized as a 7-bit value with a 1dB step size in the range of [-140, -44] dBm, and the differential L1-RSRP is quantized as a 4-bit value. The differential L1-RSRP value is calculated in 2 dB steps, with the reference value being the maximum measured L1-RSRP value belonging to the same L1-RSRP reporting instance. The bit widths of CRI, SSBRI, RSRP, and differential RSRP are provided in the table below.

[0037]

[0038] in It refers to the number of CSI-RS resources in the corresponding resource set. This refers to the number of SS / PBCH blocks configured in the corresponding resource set used to report 'ssb-Index-RSRP'. The CSI field mapping order for a report used for CRI / RSRP or SSBRI / RSRP reporting is provided in the table below.

[0039]

[0040] In traditional beam reporting procedures, all reporting-related configurations and settings are entirely controlled by the network to acquire beam information and track beam changes. However, since beam information is unpredictable on the network side, the network typically needs to configure frequent beam reporting to obtain timely beam information for data transmission, which can lead to significant reporting and signaling overhead. To address this issue, this disclosure proposes an event-triggered beam reporting method. Specifically, events for beam reporting are defined based on the monitoring of measurement quality changes between different instants / beam groups or between beams for different channels / RS. If any predefined event occurs, the UE will trigger a beam report and report the corresponding measurement results to the network for beam updates. Since event-triggered beam reporting is initiated by the UE on demand, it can significantly reduce reporting latency and uplink reporting resource consumption compared to traditional beam reporting methods.

[0041] Similarly, in traditional CSI reporting, all reporting-related configurations / settings (e.g., report type, reporting timing, uplink reporting resources) are entirely controlled by the network (NW) to obtain CSI information and track CSI changes. The UE only needs to perform channel measurements and CSI reporting based on the NW configuration, regardless of whether the CSI has changed. However, since CSI is unpredictable on the NW side, CSI reporting must follow a timeline defined by periodic, semi-persistent, and non-periodic reporting settings. Therefore, in the event of CSI changes, it may be difficult to obtain CSI reports in a timely manner. Furthermore, if there are no CSI changes, repeatedly reporting CSI information is an unnecessary waste of uplink resources. Therefore, in this document, we propose that the UE only report CSI when there is a significant channel change or when a certain event is met. That is, CSI reporting is initiated by the UE on demand, thus significantly reducing uplink reporting overhead and latency.

[0042] Example 1: Event-triggered beam reporting Using existing beam reporting procedures, the network must configure / trigger frequent beam reporting to obtain the timely and optimal beam for data transmission, which can lead to significant reporting and signaling overhead. Considering that UEs have a better understanding of channel changes, this embodiment proposes an event-triggered beam reporting method to reduce reporting latency and uplink reporting resource consumption.

[0043] In short, if beam quality changes or a predetermined event occurs, the UE can autonomously initiate beam reporting, thereby avoiding frequent beam reporting configuration / triggering. For the sake of simplicity, we define the ID or indicator of the best beam obtained through channel measurement at the current time as Q, the ID or indicator of the beam for a given channel / RS (PDCCH / PDSCH / CSI-RS, etc.) as R, and the ID or indicator of the best beam obtained through channel measurement at the previous time as P. Here, the best beam can refer to the beam selected from the set of RS resources used for channel measurement and associated with the maximum measured L1-RSRP / L1-SINR / throughput or the lowest assumed BLER. We also use 't-1' and 't' to represent the previous time and the current time, respectively. In some embodiments, the time interval between two consecutive measurements can be uniform, while in other embodiments it can be non-uniform and can be selected by the UE based on a predefined procedure. For example, at the previous instant, the best beam ID=2, while at the current instant, the best beam ID=4. Then, at the instant "t-1", the measurement quality of P(t-1) represents the measurement quality of the previously best beam ID (i.e., beam ID=2), and the measurement quality of Q(t-1) represents the measurement quality of the current best beam ID (i.e., beam ID=4). At the current instant (time t), the measurement quality of beam ID=2 will be described as the measurement quality of P(t), and the measurement quality of beam ID=4 will be described as the measurement quality of Q(t).

[0044] For the set of RS resources configured for channel measurements, beam reporting can be triggered if any (or some) of the following events occur: - The pre-configured timer has expired or has already expired.

[0045] - When the RS resource set used for channel measurement and / or associated event-triggered reports are configured or reconfigured by higher layers.

[0046] - Q(t)≠R, meaning the optimal beam at the current time is different from the beam of a given channel / RS.

[0047] - Q(t)≠P(t-1), meaning the optimal beam at the current time is different from the optimal beam at the previous time.

[0048] - The change in measurement quality (L1-RSRP, L1-SINR, throughput, or assumed BLER) is greater than the configurable value or threshold. The measurement quality change assessed above is the difference in measurement quality between the following two values.

[0049] 1) Measurement quality of {R, Q(t)} at the current time; 2) Measurement quality of {Q(t-1) at the previous time and Q(t) at the current time}; 3) Measurement quality of {P(t-1) at the previous time and Q(t) at the current time}; 4) Measurement quality of {P(t-1) at the previous time and P(t) at the current time}; 5) Measurement quality of {P(t) at the current time, Q(t) at the current time}.

[0050] Using RSRP as an example of quality measurement, Figure 3 The diagram illustrates how to determine measurement quality changes, where the endpoints of the arrows represent the corresponding RSRPs to be subtracted. The options listed above are depicted by arrows 301, 302, 303, 304, and 305, respectively. In the case of beam reporting triggered by the aforementioned event, the UE reports measurement results including at least one of the following parameters: beam indicator (CRI, SSBRI, etc.), measurement quality (L1-RSRP, L1-SINR, etc.), resource set indicator, number of beams to be reported, and measurement quality change.

[0051] Example 2: Extension to Top-K based beam reporting (K>1) In Example 1, we only consider the measurement quality changes of the best beam (i.e., the Top-1 beam) at different times in the event-triggered beam report. However, in some scenarios, the measurement quality changes of multiple beams can be monitored, and beam reporting can be triggered if the changes of multiple beams exceed a predefined threshold. For simplicity, we use similar notation as defined in Example 1. Furthermore, at each measurement instant, K beams are selected and ranked based on their associated measurement quality (L1-RSRP, L1-SINR, throughput, or assumption BLER). For example, the Top-1 beam (i.e., the best beam) is the beam selected from the RS resource set used for channel measurements that is associated with the largest measurement L1-RSRP / L1-SINR / throughput or the lowest assumption BLER, and the Top-k beam is associated with the k-th largest measurement L1-RSRP / L1-SINR / throughput or the k-th lowest assumption BLER. Typical values ​​for K can be K = 2 to 8 beams.

[0052] Based on Example 1, if K (K is a positive integer) beams are considered for measurement quality change monitoring, beam reporting can be triggered when any (or some) of the following events occur.

[0053] - For all k values ​​(k=1, 2, ... K), P(k, t-1)≠Q(k, t), meaning that all Top-K beams at the current time are different from all Top-K beams at the previous time.

[0054] - For any one of the k values ​​(k=1, 2, ... K), P(k, t-1)≠Q(k, t), meaning that the Top-k beam at the current time is different from the Top-k beam at the previous time.

[0055] - The change in measurement quality (L1-RSRP, L1-SINR, throughput, or assumed BLER) is greater than the configurable value or threshold. The measurement quality change evaluated here is the difference in measurement quality between the following two values.

[0056] 1) For one of the k values ​​(k=1, 2, ... K), the measurement quality of {Q(k, t-1) at the previous time and Q(k,t) at the current time}; 2) For one of the k values ​​(k=1, 2, ... K), the measurement quality of {P(k, t-1) at the previous time and Q(k,t) at the current time}; 3) For one of the k values ​​(k=1, 2, ... K), the measurement quality of {P(k, t-1) at the previous time and P(k,t) at the current time}; 4) For one of the k values ​​(k=1, 2, ... K), the measurement quality of {P(k, t) at the current time, Q(k,t) at the current time}.

[0057] - The variation in measurement quality (L1-RSRP, L1-SINR, throughput, or assumed BLER) exceeds the configurable value or threshold. The measurement quality variation evaluated here is the difference between the average / total measurement quality of all K beams and the following two values.

[0058] a) {Q(t-1) at the previous time, Q(t) at the current time}, where Q(t-1) and Q(t) represent the average / total measurement quality of all K beams at the previous time and the current time, respectively.

[0059] b) {P(t-1) of the previous time, P(t) of the current time}, where P(t-1) and P(t) represent the average / total measurement quality of all K beams at the previous time and the current time, respectively.

[0060] c) {P(t-1) at the previous time, Q(t) at the current time} d) {P(t) at the current time, Q(t) at the current time} Using RSRP as an example of quality measurement, Figure 4The diagram illustrates how to determine measurement quality variations, where the endpoints of the arrows indicate the corresponding RSRPs to be subtracted from each other. Arrows 401, 402, 403, and 404 represent the four scenarios listed above, respectively. Example 1 can be considered a special case of Example 2 with K=1, except for the comparison with the beam (i.e., R) of a given channel / RS.

[0061] Example 3: Extension to Timer / Counter-Based Beam Reporting For the above embodiments, we only consider beam reporting triggered by a one-time event. That is, beam reporting is triggered if the optimal beam change or measurement quality change exceeds a predetermined threshold. In this embodiment (which can be used with previous embodiments), we consider more stringent conditions for event-triggered beam reporting based on a timer / counter. Specifically, if the conditions defined in Embodiment 1 or 2 are met, they are recorded as an abnormal measurement sample, which is reported from the physical layer to the media access control (MAC) layer. The MAC layer maintains relevant timers and counters. Each time the MAC layer receives an abnormal measurement sample report, the timer is started or restarted, and the counter is incremented by 1. If the timer expires, the UE resets the counter to 0, ensuring that event-triggered beam reporting is based on continuous abnormal measurement sample reports. If the counter reaches a specified maximum value during the timer's operation, a beam reporting event is considered to have occurred.

[0062] Example 4: Extended to group-based beam reporting In certain scenarios (e.g., transmission schemes based on Multiple Transmitter Receiver Points (MTRPs)), group-based beam reporting can be configured. This means that different beams reported within the same group can be received simultaneously at the UE, or different beams reported for different groups can be received simultaneously at the UE. In group-based beam reporting, the UE should indicate the set of RS resources associated with the maximum measured value of L1-RSRP / L1-SINR, and for each group, the beam ID (CRI, SSBRI, etc.) of the indicated RS resource set is presented first. In this embodiment, we consider extending event-triggered beam reporting to MTRP or UE multi-panel scenarios.

[0063] For group-based beam reporting, each Channel State Information (CSI) resource setting includes a configuration of a list of more than one RS resource set linked to the same beam report. Measurement quality variations and / or other conditions for multiple RS resource sets should be monitored separately based on the rules defined in the above embodiments, using the same or different thresholds. For multiple RS resource sets configured with the same resource setting, the events defined for extended group-based beam reporting can be one or more of the following rules, wherein the conditions are defined in the above embodiments: - If the conditions associated with all RS resource sets are met, group-based beam reporting is triggered, and the measurement results for all RS resource sets are reported.

[0064] - If the conditions associated with one or more (not all) sets of RS resources are met A) Trigger group-based beam reporting and report measurement results for all RS resource sets. B) Alternatively, trigger group-based beam reporting and report the measurement results for these RS resource sets. C) Alternatively, do not trigger group-based beam reporting and do not report any measurement results.

[0065] Example 5: Beam indication for UE preferences As shown in the CSI field mapping order in this document, beam reporting adopts a reporting method based on differential L1-RSRP / L1-SINR, and the beam ID associated with the maximum measured value of L1-RSRP / L1-SINR is presented first. In this embodiment, we propose the following two methods to report the UE's preferred beam ID in the beam report, which serves as the UE's recommendation for potential beam switching.

[0066] A beam ID selected by the UE is presented first. This can reflect the UE's preference and may or may not be associated with the strongest L1-RSRP / L1-SINR. Alternatively or additionally, all beam IDs to be reported are presented in the mapping order of the CSI field based on the UE's preference, regardless of their L1-RSRP / L1-SINR measurements. Therefore, the UE may need to indicate the location of the strongest L1-RSRP / L1-SINR to provide a reference for differential reporting. The bit width of the location indicator can be... or ,in It is a rounding function, where N is the number of RS resources or resource groups to be reported in each report setting, and M is the number of RS resources in the configured RS resource set (N and M are positive integers).

[0067] Alternatively, the beam ID associated with the maximum measured value of L1-RSRP / L1-SINR is conventionally presented first. The UE can also indicate the beam by reporting an additional indicator that better reflects UE preferences. The bit width of the additional indicator can be as defined above. or .

[0068] Figure 1An example of a wireless communication system (e.g., a Long Term Evolution (LTE), 5G, or NR cellular network) is illustrated, comprising a BS 120 and one or more user equipments (UEs) 111, 112, and 113. In some embodiments, uplink transmissions (131, 132, 133) may include uplink control information (UCI), higher-layer signaling (e.g., UE assistance information or UE capabilities), or uplink information. In some embodiments, downlink transmissions (141, 142, 143) may include downlink control information (DCI), higher-layer signaling, or downlink information. The UE may be, for example, a smartphone, tablet, mobile computer, machine-to-machine (M2M) device, terminal, mobile device, Internet of Things (IoT) device, etc.

[0069] Figure 2 This is a block diagram representation of a portion of an apparatus based on some embodiments of the disclosed technology. Apparatus 205 (e.g., a network device, base station, or wireless device (or UE)) may include processor electronics 210 (e.g., a microprocessor implementing one or more technologies presented in this document). Apparatus 205 may include transceiver electronics 215 for transmitting and / or receiving wireless signals via one or more communication interfaces (e.g., antenna 220). Apparatus 205 may include other communication interfaces for transmitting and receiving data. Apparatus 205 may include one or more memories (not explicitly shown) configured to store information (e.g., data and / or instructions). In some implementations, processor electronics 210 may include at least a portion of transceiver electronics 215. In some embodiments, at least some of the disclosed technologies, modules, or functions are implemented using apparatus 205.

[0070] Some embodiments may preferably implement one or more of the following solutions, which are listed in the form of clauses. The following clauses are supported and further described in the above embodiments and this document. As used in the following clauses and claims, a wireless device may be a user equipment, a mobile station, or any other wireless terminal, including fixed nodes (e.g., base stations). Network devices include base stations, which include next-generation node B (gNB), enhanced node B (eNB), or any other device performing base station functions. A list of the following solutions may be implemented by some preferred embodiments.

[0071] 1. A wireless communication method (e.g.) Figure 5The method 500 described herein includes: (510) determining by a wireless device, based on rules, whether an event for beam reporting has occurred, and (520) triggering a beam reporting transmission from the wireless device to the network device when it is determined that the event for beam reporting has occurred. Additional features and details of this method are provided in Examples 1 to 5.

[0072] 2. A wireless communication method (e.g.) Figure 6 The method 600 described herein includes: receiving (610) a beam report transmission from a wireless device by a network device, wherein the beam report is determined by the wireless device based on rules by determining whether an event for the beam report has occurred; and performing (620) further wireless communication operations based on the beam report received from the wireless device. Examples 1 to 5 provide additional features and details of this method. In some embodiments, the further wireless communication operations include: initiating a beam change for data or control channel transmission based on the received beam report upon reception. In some embodiments, the network device may determine whether the received beam report transmission should be performed or ignored.

[0073] 3. The method according to any one of solutions 1 to 2, wherein the rule specifies that the event for beam reporting has occurred if any one or more of the following conditions have occurred: - The beam at the current time is different from the beam at the previous time; - The beam at the current time is different from the beam of the channel or reference signal (RS); - The measured quality change is greater than the configured value or threshold. The beam is determined based on the measurement quality associated with the RS resource set.

[0074] 4. The method according to Solution 3, wherein the measurement quality variation includes differences in measurement quality values ​​of: (1) the beam of the channel or the reference signal, and (2) the beam associated with the RS resource set.

[0075] 5. The method according to Solution 3, wherein the measurement quality variation includes differences in measurement quality values ​​of: (1) the beam at the previous time and (2) the beam at the current time, wherein the beam is determined based on the measurement quality associated with the RS resource set at the current time.

[0076] 6. The method according to Solution 3, wherein the measurement quality variation includes differences in measurement quality values ​​of: (1) the beam associated with the RS resource set at the previous time, and (2) the beam associated with the RS resource set at the current time.

[0077] 7. The method according to Solution 3, wherein the measurement quality variation includes differences in measurement quality values ​​of: (1) the beam at the previous time and (2) the beam at the current time, wherein the beam is determined based on the measurement quality associated with the RS resource set at the previous time.

[0078] 8. The method according to Solution 3, wherein the measurement quality variation includes differences in measurement quality values ​​for the following: the measurement quality of the two beams at the current time, wherein the two beams are determined based on the measurement quality associated with the RS resource set at the previous time and the current time, respectively.

[0079] 9. The method according to any one of solutions 4 to 8, wherein the beam of the previous time or the beam of the current time is the optimal beam associated with the maximum or minimum measurement quality.

[0080] 10. The method according to any one of solutions 3 to 9, wherein the measurement quality includes at least one of the following: Level 1 reference signal received power (L1-RSRP), L1 signal-to-interference-plus-noise ratio (L1-SINR), throughput, or assumed block error rate (BLER).

[0081] 11. The method according to any one of solutions 1 to 10, wherein the rule specifies that the event for beam reporting has occurred due to the expiration of the timer.

[0082] 12. The method according to any one of solutions 1 to 11, wherein the rule specifies that the event for beam reporting has occurred when the reference signal resource set or associated reports for channel measurement are configured or reconfigured by a higher layer.

[0083] 13. The method according to any one of solutions 1 to 12, wherein the beam report transmission indicates at least one of a beam indicator, measurement quality, resource set indicator, reported beam count, or measurement quality change.

[0084] 14. The method according to solution 13, wherein the beam indicator includes a channel state indication reference signal resource indicator (CRI) or a synchronization signal block resource indicator (SSBRI).

[0085] Example 1 provides additional features and details of the solutions listed above.

[0086] 15. The method according to any one of solutions 1 to 14, wherein the rule is based on the occurrence of conditions considering K optimal beams, where K is a positive integer.

[0087] 16. The method according to solution 15, wherein the condition is that at least one of the K best beams at the current time is different from the K best beams at the previous time, wherein the K best beams are determined based on the measurement quality associated with a set of reference signal (RS) resources.

[0088] 17. The method according to solution 15, wherein the condition is that the measurement quality of one or more of the K optimal beams changes by more than a threshold between the previous time and the current time.

[0089] 18. The method according to Solution 15, wherein the condition is: the average or total measurement quality of all K best beams changes by more than a threshold between the previous time and the current time.

[0090] 19. The method according to solution 15, wherein the condition for the K best beams includes: the measurement quality variation between the following two values ​​is greater than a configuration value or a threshold: the average measurement quality of the K previous best beams at the current time and the average measurement quality of the K current best beams at the current time; or the total measurement quality of the K previous best beams at the current time and the total measurement quality of the K current best beams at the current time.

[0091] 20. The method according to Solution 15, wherein the condition for the K best beams includes: the measurement quality change between the following two values ​​is greater than a configuration value or a threshold: the average measurement quality of a subset of the K current best beams at the previous time and the average measurement quality of the subset of the K current best beams at the current time; or the total measurement quality of a subset of the K current best beams at the previous time and the total measurement quality of the subset of the K current best beams at the current time.

[0092] 21. The method according to Solution 15, wherein the condition for the K best beams includes: the measurement quality variation between the following two values ​​is greater than a configuration value or a threshold: the average measurement quality of a subset of the K previous best beams at the previous time and the average measurement quality of a subset of the K current best beams at the current time; or the total measurement quality of a subset of the K previous best beams at the previous time and the total measurement quality of a subset of the K current best beams at the current time.

[0093] 22. The method according to Solution 15, wherein the condition for the K best beams includes: the measurement quality variation between the following two values ​​is greater than a configuration value or a threshold: the average measurement quality of a subset of the K previous best beams at the previous time and the average measurement quality of the subset of the K previous best beams at the current time; or the total measurement quality of a subset of the K previous best beams at the previous time and the total measurement quality of the subset of the K previous best beams at the current time.

[0094] 23. The method according to Solution 15, wherein the condition for the K best beams includes: the measurement quality variation between the following two values ​​is greater than a configuration value or a threshold: the average measurement quality of a subset of the K previous best beams at the current time and the average measurement quality of a subset of the K current best beams at the current time; or the total measurement quality of a subset of the K previous best beams at the current time and the total measurement quality of a subset of the K current best beams at the current time.

[0095] 24. The method according to any one of solutions 16 to 23, wherein the K best beams, the K current best beams, or the K previous best beams correspond to the K best beams associated with the maximum or minimum measurement quality.

[0096] 25. The method according to any one of solutions 15 to 24, wherein the maximum measurement quality includes the Layer 1 reference signal received power (L1-RSRP), the L1 signal-to-interference-plus-noise ratio (L1-SINR), and the throughput, or the minimum measurement quality includes the assumed block error rate (BLER).

[0097] Example 2 provides additional features and details of the solutions listed above.

[0098] 26. The method according to any one of solutions 1 to 25, wherein the rule is based on a count of the number of times a condition is satisfied.

[0099] 27. The method according to solution 26, wherein the conditions are determined over a period of time.

[0100] Example 3 provides additional features and details of the solutions listed above.

[0101] 28. The method according to any one of solutions 1 to 27, wherein the rule is based on monitoring conditions associated with a plurality of reference signal resource sets.

[0102] 29. The method according to solution 28, wherein the rule specifies that when the event for beam reporting occurs, group-based beam reporting is triggered, and the measurement results of all reference signal resource sets are reported in the beam reporting transmission.

[0103] 30. The method according to Solution 29, wherein the rule specifies that when the event for beam reporting occurs, a group-based beam reporting is triggered, and the measurement results of the set of reference signal resources used to determine the occurrence of the event are reported in the beam reporting transmission.

[0104] 31. The method according to any one of solutions 28 to 30, wherein the event for beam reporting includes: the satisfaction of a condition associated with one or more, but not all, sets of reference signal resources.

[0105] 32. The method according to any one of solutions 28 to 30, wherein the event for beam reporting includes: a condition associated with all sets of reference signal resources being satisfied.

[0106] 33. The method according to any one of solutions 1 to 32, wherein the beam report transmission indicates the selected beam and includes a bit width log2M or log2N The identifier indicates the beam with the strongest channel measurement or the beam selected by the wireless device, where N is the number of reference signal resources or resource groups reported in each report, and M is the number of reference signal resources in the configured set of reference signal resources.

[0107] Examples 4 and 5 provide additional features and details of the solutions listed above. As previously stated, the features and solutions listed in the different embodiments can be combined together.

[0108] 34. A wireless communication device comprising one or more processors configured to perform the method according to any one of solutions 1 to 33.

[0109] 35. A computer-readable medium storing code that, when executed by one or more processors, causes the one or more processors to implement the method of any one of solutions 1 to 33.

[0110] It should be understood that this document discloses techniques that can be embodied in various embodiments to allow the UE to trigger the reporting of beam reporting information. Specifically, events for beam reporting are defined based on the monitoring of measurement quality changes between different instants / beam groups or between beams for different channels / RS. If any predefined event occurs, a beam report will be triggered. Since event-triggered beam reporting is initiated by the UE on demand, reporting latency and uplink reporting resource consumption can be significantly reduced compared to traditional beam reporting methods.

[0111] The disclosed and other embodiments, modules, and functional operations described in this document can be implemented in digital electronic circuits or computer software, firmware, or hardware, including the structures disclosed in this document and their structural equivalents, or one or more combinations thereof. The disclosed and other embodiments can be implemented as one or more computer program products, i.e., one or more computer program instruction modules encoded on a computer-readable medium for execution by or control of the operation of a data processing apparatus. The computer-readable medium can be a machine-readable storage device, a machine-readable storage substrate, a memory device, a combination of substances influencing machine-readable propagation signals, or one or more combinations thereof. The term "data processing apparatus" encompasses all means, devices, and machines for processing data, including, for example, a programmable processor, a computer, or multiple processors or computers. In addition to hardware, the apparatus may also include code that creates an execution environment for an associated computer program, such as code constituting processor firmware, a protocol stack, a database management system, an operating system, or one or more combinations thereof. Propagation signals are artificially generated signals, such as machine-generated electrical signals, optical signals, or electromagnetic signals, which are generated to encode information for transmission to a suitable receiver device.

[0112] Computer programs (also known as programs, software, software applications, scripts, or code) can be written in any programming language, including compiled or interpreted languages, and can be deployed in any form, including as standalone programs or as modules, components, subroutines, or other units suitable for use in a computing environment. A computer program does not necessarily correspond to a file in a file system. A program can be stored as a part of a file that holds other programs or data (e.g., one or more scripts stored in a markup language document), in a single file dedicated to a related program, or in multiple coordinated files (e.g., a file storing one or more modules, subroutines, or code sections). A computer program can be deployed to execute on a single computer or on multiple computers located at one site or distributed across multiple sites and interconnected by a communication network.

[0113] The processes and logic flows described in this document can be executed by one or more programmable processors that execute one or more computer programs to perform functions by manipulating input data and generating outputs. The processes and logic flows can also be executed by dedicated logic circuits, and the devices can be implemented as dedicated logic circuits, such as FPGAs (Field-Programmable Gate Arrays) or ASICs (Application-Specific Integrated Circuits).

[0114] Processors suitable for executing computer programs include, for example, general-purpose and special-purpose microprocessors, and any one or more processors of any kind of digital computer. Typically, a processor receives instructions and data from read-only memory or random access memory, or both. The basic components of a computer are a processor for executing instructions and one or more memory devices for storing instructions and data. Typically, a computer will also include, or be operatively coupled to, receiving data from or transferring data to one or more mass storage devices (e.g., magnetic disks, magneto-optical disks, or optical disks) for storing data, or both. However, a computer does not need to have such devices. Computer-readable media suitable for storing computer program instructions and data include all forms of non-volatile memory, media, and memory devices, including, for example, semiconductor memory devices (e.g., EPROM, EEPROM, and flash memory devices), magnetic disks (e.g., internal hard disks or removable disks), magneto-optical disks, and CD-ROMs and DVD-ROMs. The processor and memory may be supplemented or incorporated therein by dedicated logic circuitry.

[0115] Some embodiments described herein are described in the general context of a method or process that, in one embodiment, may be implemented by a computer program product embodied in a computer-readable medium, including computer-executable instructions (e.g., program code), executed by a computer in a networked environment. The computer-readable medium may include removable and non-removable storage devices, including but not limited to read-only memory (ROM), random access memory (RAM), compact discs (CDs), digital versatile discs (DVDs), etc. Therefore, the computer-readable medium may include non-transitory storage media. Typically, program modules may include routines, programs, objects, components, data structures, etc., for performing a specific task or implementing a specific abstract data type. Computer or processor-executable instructions, associated data structures, and program modules represent examples of program code for performing steps of the methods disclosed herein. A particular order of such executable instructions or associated data structures represents examples of corresponding behaviors for implementing the functionality described in such steps or processes.

[0116] Some disclosed embodiments may be implemented as devices or modules using hardware circuitry, software, or a combination thereof. For example, a hardware circuitry implementation may include discrete analog and / or digital components, such as those integrated as part of a printed circuit board. Alternatively, or additionally, the disclosed components or modules may be implemented as application-specific integrated circuits (ASICs) and / or field-programmable gate arrays (FPGAs). Some implementations may additionally or alternatively include digital signal processors (DSPs), which are special-purpose microprocessors with an architecture optimized for the operational requirements of digital signal processing associated with the functions disclosed herein. Similarly, various components or sub-components within each module may be implemented in software, hardware, or firmware. Interconnectivity between modules and / or components within modules may be provided using any connection methods and media known in the art, including but not limited to communication via the Internet, wired or wireless networks using appropriate protocols.

[0117] Although this document contains many specific details, these should not be construed as limiting the scope of the claimed invention or what may be claimed, but rather as descriptions of specific features of particular embodiments. Some features described in the context of individual embodiments in this document may also be implemented in combination in a single embodiment. Conversely, various features described in the context of a single embodiment may also be implemented individually or in any suitable sub-combination in multiple embodiments. Furthermore, although features may be described above as operating in certain combinations, and even initially claimed, in some implementations one or more features of the claimed combination may be removed from said combination, and the claimed combination may be for sub-combinations or variations thereof. Similarly, although operations are depicted in a specific order in the drawings, this should not be construed as requiring such operations to be performed in the specific order or sequential sequence shown, or requiring all shown operations to achieve the desired result.

[0118] Only a few implementations and examples are described, and other implementations, enhancements and variations may be made based on what is described and illustrated in this disclosure.

Claims

1. A wireless communication method, comprising: Wireless devices determine whether an event used for beam reporting has occurred based on rules; as well as When it is determined that the event for beam reporting has occurred, beam reporting transmission from the wireless device to the network device is triggered.

2. A wireless communication method, comprising: The network device receives a beam report transmission from the wireless device, wherein the beam report is determined by the wireless device based on rules by determining whether an event for beam reporting has occurred; as well as Further wireless communication operations are performed based on the beam report received from the wireless device.

3. The method according to any one of claims 1 to 2, wherein the rule specifies that the event for beam reporting has occurred if any one or more of the following conditions have been met: - The beam at the current time is different from the beam at the previous time; - The beam at the current time is different from the beam of the channel or reference signal (RS); - The measured quality change is greater than the configured value or threshold. The beam is determined based on the measurement quality associated with the RS resource set.

4. The method of claim 3, wherein the change in measurement quality includes differences in the measurement quality values ​​of the following: (1) the beam of the channel or the reference signal, and (2) the measurement quality of the beam associated with the RS resource set.

5. The method of claim 3, wherein the change in measurement quality includes differences in the measurement quality values ​​of the following: - (1) the beam at the previous time and (2) the measurement quality of the beam at the current time, wherein the beam is determined based on the measurement quality associated with the RS resource set at the current time.

6. The method of claim 3, wherein the change in measurement quality includes differences in the measurement quality values ​​of the following: (1) The beam associated with the RS resource set at the previous time, and (2) The measurement quality of the beam associated with the RS resource set at the current time.

7. The method of claim 3, wherein the change in measurement quality includes differences in the measurement quality values ​​of the following: - (1) the beam at the previous time and (2) the measurement quality of the beam at the current time, wherein the beam is determined based on the measurement quality associated with the RS resource set at the previous time.

8. The method of claim 3, wherein the change in measurement quality includes differences in the measurement quality values ​​of the following: The measurement quality of the two beams at the current time, wherein the two beams are determined based on the measurement quality associated with the RS resource set at the previous time and the current time.

9. The method according to any one of claims 4 to 8, wherein the beam of the previous time or the beam of the current time is the optimal beam associated with the maximum or minimum measurement quality.

10. The method according to any one of claims 3 to 9, wherein the measurement quality includes at least one of the following: Level 1 reference signal received power (L1-RSRP), L1 signal-to-interference-plus-noise ratio (L1-SINR), throughput, or assumed block error rate (BLER).

11. The method according to any one of claims 1 to 10, wherein the rule specifies that the event for beam reporting has occurred due to the expiration of the timer.

12. The method according to any one of claims 1 to 11, wherein the rule specifies that the event for beam reporting has occurred when the reference signal resource set or associated reports for channel measurement are configured or reconfigured by a higher layer.

13. The method according to any one of claims 1 to 12, wherein the beam report transmission indicates at least one of a beam indicator, measurement quality, resource set indicator, reported beam count, or measurement quality change.

14. The method of claim 13, wherein the beam indicator includes a Channel State Indication Reference Signal Resource Indicator (CRI) or a Synchronization Signal Block Resource Indicator (SSBRI).

15. The method according to any one of claims 1 to 14, wherein the rule is based on the occurrence of conditions considering K optimal beams, where K is a positive integer.

16. The method of claim 15, wherein the condition is that at least one of the K best beams at the current time is different from the K best beams at the previous time, wherein the K best beams are determined based on measurement quality associated with a set of reference signal (RS) resources.

17. The method of claim 15, wherein the condition is that the measurement quality of one or more of the K optimal beams changes by more than a threshold between the previous time and the current time.

18. The method of claim 15, wherein the condition is that the average or total measurement quality of all K best beams changes by more than a threshold between the previous time and the current time.

19. The method of claim 15, wherein the conditions for the K optimal beams include: The measurement quality variation between the following two values ​​is greater than the configured value or threshold: The average measurement quality of the K previous best beams at the current time and the average measurement quality of the K current best beams at the current time; or The total measurement quality of the K previous best beams at the current time and the total measurement quality of the K current best beams at the current time.

20. The method of claim 15, wherein the conditions for the K optimal beams include: The measurement quality variation between the following two values ​​is greater than the configured value or threshold: The average measurement quality of the subset of the K current best beams at the previous time and the average measurement quality of the subset of the K current best beams at the current time; or The total measurement quality of the subset of the K current best beams at the previous time and the total measurement quality of the subset of the K current best beams at the current time.

21. The method of claim 15, wherein the conditions for the K optimal beams include: The measurement quality variation between the following two values ​​is greater than the configured value or threshold: The average measurement quality of the subset of the K previous best beams at the previous time and the average measurement quality of the subset of the K current best beams at the current time; or The total measurement quality of the subset of the K previously best beams at the previous time and the total measurement quality of the subset of the K currently best beams at the current time.

22. The method of claim 15, wherein the conditions for the K optimal beams include: The measurement quality variation between the following two values ​​is greater than the configured value or threshold: The average measurement quality of the subset of the K previous best beams at the previous time and the average measurement quality of the subset of the K previous best beams at the current time; or The total measurement quality of the subset of the K previous best beams at the previous time and the total measurement quality of the subset of the K previous best beams at the current time.

23. The method of claim 15, wherein the conditions for the K optimal beams include: The measurement quality variation between the following two values ​​is greater than the configured value or threshold: The average measurement quality of the subset of the K previous best beams at the current time and the average measurement quality of the subset of the K current best beams at the current time; or The total measurement quality of the subset of the K previous best beams at the current time and the total measurement quality of the subset of the K current best beams at the current time.

24. The method according to any one of claims 16 to 23, wherein the K best beams, the K current best beams, or the K previous best beams correspond to the K best beams associated with the maximum or minimum measurement quality.

25. The method according to any one of claims 15 to 24, wherein the maximum measurement quality includes the first layer reference signal received power (L1-RSRP), the L1 signal-to-interference-plus-noise ratio (L1-SINR), and the throughput, or the minimum measurement quality includes the assumed block error rate (BLER).

26. The method according to any one of claims 1 to 25, wherein the rule is based on a count of the number of times a condition is satisfied.

27. The method of claim 26, wherein the condition is determined over a period of time.

28. The method according to any one of claims 1 to 27, wherein the rule is based on monitoring conditions associated with a plurality of reference signal resource sets.

29. The method of claim 28, wherein the rule specifies that, when the event for beam reporting occurs, group-based beam reporting is triggered, and the measurement results of all reference signal resource sets are reported in the beam reporting transmission.

30. The method of claim 29, wherein the rule specifies that, when the event for beam reporting occurs, group-based beam reporting is triggered, and measurement results of a set of reference signal resources used to determine the occurrence of the event are reported in the beam reporting transmission.

31. The method according to any one of claims 28 to 30, wherein the events for beam reporting include: The conditions associated with one or more, but not all, sets of reference signal resources are satisfied.

32. The method according to any one of claims 28 to 30, wherein the event for beam reporting comprises: The conditions associated with the set of all reference signal resources are satisfied.

33. The method according to any one of claims 1 to 32, wherein the beam reporting transmission indicates the selected beam and includes a bit width log2M or log2N The identifier indicates the beam with the strongest channel measurement or the beam selected by the wireless device, where N is the number of reference signal resources or resource groups reported in each report, and M is the number of reference signal resources in the configured set of reference signal resources.

34. A wireless communication device comprising one or more processors configured to perform the method according to any one of claims 1 to 33.

35. A computer-readable medium storing code that, when executed by one or more processors, causes the one or more processors to implement the method of any one of claims 1 to 33.

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