Random access reporting method and user equipment

Abstract

Provided in the present disclosure are a random access reporting method and a user equipment. The random access (RA) reporting method comprises: a user equipment (UE) executes a random access (RA) process of a message 1 repetition in the coverage enhancement (CE) scenario; the UE determines that the RA process is completed; and the UE saves in a RA report RA information related to the message 1 repetition, the RA information related to the message 1 repetition comprising at least one of the following: RA information used for indicating the first message 1 repetition counts used in the random access process, RA information used for indicating whether backoff of the message 1 repetition counts occurs in the random access process, and RA information used for indicating the maximum number of preamble transmissions for message 1 repetition counts configured by a network side before changing to higher repetition counts.

Description

Random access reporting method and user equipment Technical Field

[0001] The present disclosure relates to the technical field of wireless communications, and more particularly, to a random access reporting method and a corresponding user equipment. Background Art

[0002] Network optimization in wireless networks can achieve the goal of optimizing network performance. Data collection and analysis are typically performed on existing deployed and operational networks to identify factors affecting network quality. Network performance can then be improved by modifying configured network parameters, adjusting network structure, and adjusting deployed equipment. Self-configuration and self-optimization networks (SON) refer to the process of automatically adjusting the network based on user equipment and / or base station measurements and performance measurements. The network can configure UEs to perform measurements for SON. SON functions include many aspects, such as the Automatic Neighbor Relation (ANR) function, which reduces the operator's burden of neighbor management; Mobility Load Balancing (MLB), which balances load between different cells; Mobility Robustness Optimization (MRO), which optimizes mobility performance; Random Access Channel Optimization, which optimizes random access channel parameters; and Radio Link Failure Reporting (RLFR), which optimizes coverage and MRO.

[0003] Furthermore, Minimization of Drive Tests (MDT) technology is also a key tool for operators to optimize their networks. By obtaining drive test data from user equipment (UE), operators can obtain relevant network optimization parameters. Based on this data, operators can analyze the status of network deployment and operations, thereby determining how to improve network operations. MDT is primarily used in coverage optimization, capacity optimization, mobility management optimization, QoS parameter optimization, and common channel parameter configuration optimization.

[0004] In the NR system, the Random Access (RA) report is used to record information about the random access procedure performed on the UE side, so that the network side can optimize issues such as random access parameters and network coverage.

[0005] The introduction of a Coverage Enhancement (CE) mechanism in Release 18 NR systems is under discussion. This mechanism aims to improve transmission and reception quality in areas with weak network coverage, thereby enhancing network coverage. One of its objectives is to improve coverage during the random access process. One of the technical measures employed is Message 1 Repetition. Depending on the strength of network coverage, different repetition times can be determined or configured. Multiple repeated transmissions ensure that Message 1 is correctly received by the network.

[0006] The present disclosure aims to solve the problem of random access information reporting in NR networks, and further, to solve the problem of RA reporting in networks that support Message 1 repetition. Summary of the Invention

[0007] The main purpose of the present disclosure is to provide an RA reporting method and a user equipment, so as to implement the reporting problem of performance information related to the random access process of message 1 repetition in a system supporting message 1 repetition.

[0008] According to a first aspect of the present disclosure, an RA reporting method is provided, comprising: 1. A random access RA reporting method, comprising: a user equipment UE performs a random access RA process using message 1 repetition-related information; the UE determines that the RA process is completed; and the UE saves message 1 repetition-related RA information in the RA report, wherein the saving of message 1 repetition-related RA information includes one or more of the following operations: Operation 1: The UE includes first RA information in the RA report, and the first RA information is used to indicate the first number of repetitions used in the random access process; Operation 2: The UE includes second RA information in the RA report, and the second RA information is used to indicate a change to a higher number of repetitions configured by the network side. The maximum number of times the preamble of the message 1 repetition number before the number is sent; Operation 3: The UE includes a third RA information in the RA report, and the third RA information is used to indicate one or more message 1 repetition numbers used in the random access process; Operation 4: The UE includes a fourth RA information in the RA report, and the fourth RA information is used to indicate the number of message 1 repetitions configured in the non-contention random access process; Operation 5: The UE includes a fifth RA information in the RA report, and the fifth RA information includes a RACH partition configuration information list; each item in the list includes the index value of the first preamble corresponding to a RACH partition and / or the number of consecutive preambles starting from the first start preamble of each SSB corresponding to the partition Number; Operation 6: If the random access procedure applies Message 1 repetition, the UE includes in the RA report the sixth RA information for indicating the downlink path loss reference RSRP value when initiating the random access procedure; Operation 7: The UE includes in the RA report the seventh RA information for indicating that the random access procedure is triggered by Message 1 repetition, and includes it in the triggeredFeatureCombination information element; Operation 8: If Message 1 repetition is part of the feature combination used in the random access procedure, the RA report includes the eighth RA information for indicating that the feature used in the random access procedure includes Message 1 repetition, and includes Included in the usedFeatureCombination information element; Operation 9: The UE includes ninth RA information in the RA report, and the ninth RA information is used to indicate the maximum value of the number of repetitions of message 1 used in the random access procedure; Operation 10: The UE includes tenth RA information in the RA report, and the tenth RA information is used to indicate whether the number of repetitions of message 1 used in the random access procedure has fallen back from a low number of repetitions to a high number of repetitions; Operation 11: The UE includes eleventh RA information in the RA report, and the eleventh RA information is used to indicate the number of fallbacks for the number of repetitions of message 1 used in the random access procedure to fall back from a low number of repetitions to a high number of repetitions;Operation 12: The UE includes twelfth RA information in the RA report, where the twelfth RA information is used to indicate that the number of repetitions of message 1 used in the random access procedure has fallen back from a low repetition number M to a high repetition number N, where M or N is 2, 4, or 8.

[0009] In the RA reporting method of the first aspect above, the second RA information is set to the value of the preambleTransMax-Msg1-Repetition information element, and the value of the preambleTransMax-Msg1-Repetition information element is configured by the network side in the BWP-UplinkCommon information element or in the RACH-ConfigCommon information element; wherein the BWP-UplinkCommon information element is used to configure the common parameters of an uplink bandwidth part BWP, and the RACH-ConfigCommon information element is used to configure cell-specific random access parameters.

[0010] In the RA reporting method of the first aspect, the fourth RA information is set to the value of msg1-RepetitionNum in the RACH-Configdedicated information element; or, if the random access procedure is triggered by a physical downlink control channel (PDCCH) command, the fourth RA information is set to the value of msg1-RepetitionNum in the PDCCH command. The RACH-Configdedicated information element is used to configure dedicated random access parameters.

[0011] In the RA reporting method of the first aspect above, the seventh RA information is represented by the msg1-Repetitions information element and included in the triggeredFeatureCombination information element, wherein the triggeredFeatureCombination information element is used to indicate one or more random access resource characteristics that trigger the current random access process.

[0012] In the RA reporting method of the first aspect above, the UE includes the ninth RA information in the RA report only when the value of the ninth RA information is different from the seventh or first RA information; or, the UE includes the ninth RA information in the RA report only when more than one repetition number of the message 1 repetition feature is used during the random access process.

[0013] In the RA reporting method of the first aspect, the tenth RA information is used to distinguish random access preamble attempts, and the UE determines whether to include the tenth RA information for each random access preamble attempt.

[0014] In the RA reporting method of the first aspect, the twelfth RA information is used to distinguish random access preamble attempts, and the UE determines whether to include the twelfth RA information for each random access preamble attempt.

[0015] In the RA reporting method of the first aspect above, the UE receives a UE information request UEInformationRequest message from the base station, which includes an instruction for requesting the UE to report the saved RA report; based on the instruction, the UE includes the saved RA report including one or more of the first RA information to the twelfth RA information in a UE information response UEInformationResponse message and sends it to the base station.

[0016] According to a second aspect of the present disclosure, a user equipment is provided, comprising: a processor; and a memory storing instructions; wherein the instructions, when executed by the processor, execute the above-mentioned RA reporting method.

[0017] Effects of the Invention

[0018] According to the RA reporting method and user equipment performed by the user equipment disclosed in the present invention, in a CE system that supports message 1 repetition, it is possible to report message 1 repetition-specific performance information that is different from the RA information corresponding to the traditional RA process, so that the network side can distinguish between the RA process occurring in the message 1 repetition scenario and the RA process in the traditional non-message 1 repetition scenario, and based on the message 1 repetition-specific information, analyze the random access performance and message 1 repetition configuration in the CE scenario and optimize the parameter configuration in a more refined manner. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] The above and other features of the present disclosure will become more apparent from the following detailed description taken in conjunction with the accompanying drawings, in which:

[0020] FIG1 is a schematic flow chart of a four-step contention-based random access process.

[0021] FIG2 is a schematic flow chart of a non-contention-based random access process.

[0022] FIG3 is a schematic flow chart showing a random access procedure based on repetition of message 1.

[0023] FIG4 is a schematic flowchart showing the RA reporting method in the first embodiment of the present invention.

[0024] FIG5 is a schematic flowchart showing the RA reporting method in the second embodiment of the present invention.

[0025] FIG6 shows a block diagram of a user equipment according to an embodiment of the present disclosure. DETAILED DESCRIPTION

[0026] Other aspects, advantages, and salient features of the disclosure will become apparent to those skilled in the art from the following detailed description of exemplary embodiments of the disclosure, taken in conjunction with the accompanying drawings.

[0027] In this disclosure, the terms "include" and "including" and their derivatives mean inclusion without limitation; the term "or" is inclusive, meaning and / or.

[0028] In this specification, the various embodiments described below for describing the principles of the present disclosure are merely illustrative and should not be construed in any way as limiting the scope of the disclosure. The following description with reference to the accompanying drawings is intended to assist in a comprehensive understanding of the exemplary embodiments of the present disclosure as defined by the claims and their equivalents. The following description includes a variety of specific details to aid understanding, but these details should be considered merely exemplary. Therefore, it should be recognized by those of ordinary skill in the art that various changes and modifications may be made to the embodiments described herein without departing from the scope and spirit of the present disclosure. In addition, for the sake of clarity and brevity, descriptions of well-known functions and structures have been omitted. In addition, throughout the drawings, the same reference numerals are used for similar functions and operations.

[0029] The following describes multiple embodiments of the present disclosure using the NR mobile communication system as an example application environment. However, it should be noted that the present disclosure is not limited to the following embodiments, but is applicable to many other wireless communication systems.

[0030] The base station in this disclosure can be any type of base station. The network side generally refers to a base station or a cell. The cell can also be a cell under any of the above types of base stations. Unless otherwise specified, base station, cell, cell group, beam, and transmission point (TRP) are interchangeable. A base station can also be a gNB-Central Unit (gNB-CU) or a gNB-Distributed Unit (gNB-DU) that constitutes a base station. Different embodiments can also work in conjunction with each other. For example, unless otherwise specified, the same variables, parameters, and terms in different embodiments have the same interpretation. Cancel, release, delete, clear, and clear are interchangeable. Execute, use, and apply are interchangeable. Configure and reconfigure are interchangeable. Monitor and detect are interchangeable. Initiate and trigger are interchangeable.

[0031] The following first describes some existing mechanisms / prior technologies involved in the present disclosure. It is worth noting that some of the names in the following description are only illustrative and not restrictive, and other names may also be used.

[0032] Physical Random Access Channel (PRACH) resource: The base station broadcasts the physical random access channel parameter configuration used by the cell through system information. In this disclosure, physical random access channel resources (PRACH) can refer to physical frequency resources and / or time domain resources and / or code domain resources (such as preamble) used for random access.

[0033] Random Access Channel: Random Access Channel, RACH. Refers to the channel used to send random access preambles. In this disclosure, RACH can refer to both the transport channel RACH and the physical random access channel PRACH, without distinction. RACH parameters / configuration refer to the wireless configuration for implementing the random access function, including PRACH-related configurations, such as the maximum number of preamble transmissions, power boost parameters, random access response receiving window size, medium access control (MAC) contention resolution timer configuration, PRACH time-frequency resource configuration, message 1 (i.e. preamble) subcarrier spacing, information used to indicate the number of synchronization channel blocks (SSBs) corresponding to each RACH occasion (RO) and the number of contention-based random preambles corresponding to each SSB (configured by the ssb-perRACH-OccasionAndCB-PreamblesPerSSB information element), backoff parameters (in the scalingFactorBI information element), etc.

[0034] Random access RA process:

[0035] In the existing NR mechanism, the random access process can be divided into contention-based random access (CBRA) and non-contention-based random access (CFRA). The CBRA process is shown in Figure 1 and consists of four steps: Step 1, the UE sends Message 1 (i.e., the random access preamble) to the base station; Step 2, the UE receives Message 2 (i.e., the random access response, RAR) from the base station; Step 3, the UE sends Message 3 (an uplink transmission scheduled by the uplink grant in Message 2). Message 3 generally contains the UE identifier, an RRC message for establishing / resuming / reestablishing a Radio Resource Control (RRC) connection, and a UE contention resolution identifier for random access contention resolution. Step 4, the UE receives Message 4 (i.e., a contention resolution message) from the base station. The PRACH resources used in CBRA are shared by many UEs. Once the UE completes the four steps of CBRA random access and successfully resolves contention, the random access process is successfully completed. The CFRA process, shown in Figure 2, consists of two steps: Step 1: The UE sends Message 1 (i.e., the Random Access Preamble) to the base station; Step 2: The UE receives Message 2 (i.e., the Random Access Response, RAR) from the base station. After successfully receiving Message 2 associated with Message 1, the UE considers the CFRA process to be successfully completed. CFRA is typically performed by the base station pre-allocating dedicated PRACH resources, such as the preamble (referred to as Step 0 in Figure 2), to the UE, eliminating contention. New Radio Frequency Identification (NR) versions R16 and later introduce a two-step random access process, consisting of Message A and Message B.

[0036] The UE can trigger the random access procedure in various situations, such as initial access, beam recovery request, handover (also called synchronization reconfiguration in NR) performed when transitioning from RRC idle state or RRC inactive state (RRC_INACTIVE) to RRC connected state, uplink data arriving to the UE in RRC connected state while the uplink is out of synchronization, and no physical uplink control channel (PUCCH) resources are available for the UE in RRC connected state.

[0037] Random access RA report:

[0038] In the current NR system, there are three main scenarios in which the UE reports RA information to the network.

[0039] In the first type of RA information report, the UE records the RA information of each successful or failed random access process in the variable VarRA-Report. For the random access report that records the random access process information, the base station will send a UE information request UEinformationRequest message to the UE, which includes an RA report request indication (ra-ReportReq information element) to request the UE to report the saved RA report of the random access process. After receiving the UEinformationRequest message containing the indication, the UE reports the saved RA report to the base station in the UE information response UEinformationReponse message. The base station uses a RA report reported by a UE as a sample. Based on a sufficient number of samples, the base station can analyze whether the current RACH performance meets the requirements and adjust the RACH parameters as required to improve the RACH performance.

[0040] The second type of RA information related report is included in the Connection Establishment Failure (CEF) report. If the initial access fails (RRC connection establishment process failure or RRC connection recovery process failure), the corresponding CEF report also contains the random access information of the random access procedure performed during the RRC connection establishment / recovery process. The UE variable VarConnEstFailReport is used to store the CEF report information.

[0041] The third type of RA information-related report is included in the Radio Link Failure (RLF) report. For example, when a radio link failure or synchronization reconfiguration failure is triggered by a random access failure, the corresponding radio link failure report will also contain the corresponding random access information. The UE variable VarRLF-Report is used to store the RLF report information.

[0042] Generally speaking, an RA report refers to the first type of RA information report described above. The subsequent embodiments of this disclosure use RA reports as an example to describe specific implementation methods. However, it is worth noting that the implementation methods are not limited to the first type of RA report described above. The RA report described in this disclosure can also apply to RA information in the second or third type of RA information report described above, or other reports containing RA information reported by the UE to the network.

[0043] The RA report in LTE mainly contains two pieces of information about the random access process: the number of random access preambles sent (numberofpreamblesent), which indicates the number of random access preambles sent during the random access process and corresponds to the PREAMBLE_TRANSMISSION_COUNTER count value of the MAC layer; and the contention detected indicator (contentiondetected), which indicates whether contention was detected for at least one random access preamble sent. RACH parameters that can be adjusted by the base station include RACH resource configuration, random access preamble partitioning, RACH backoff parameters, and RACH transmit power control parameters.

[0044] NR systems released in Release 16 and later adopt the aforementioned framework from LTE and enhance it with NR features such as beamforming. NR systems support the UE storing RA information corresponding to multiple random access procedures. A UE can store up to eight RA reports.

[0045] When a UE completes a random access procedure, if the number of RA-report entries in the random access report list ra-ReportList stored in the current variable VarRA-Report is less than the maximum number of RA reports (maxRAReport) supported by the system, the UE adds a new entry to VarRA-Report to record information about the completed random access procedure. Information corresponding to a random access procedure may include: information about the cell in which the random access preamble is transmitted (global cell identifier, tracking area code or physical cell identifier, and carrier frequency), random access purpose information, a special cell identifier corresponding to the random access procedure, and common random access information (e.g., represented by the ra-InformationCommon information element). The common random access information includes reference downlink frequency information associated with the random access procedure (e.g., absolute frequency of PointA, subcarrier spacing, bandwidth location information, etc.) and RA information associated with each random access attempt, arranged in chronological order (e.g., represented by the perRAInfoList information element). The RA information associated with each random access attempt includes the beam index value, the number of consecutive random access attempts on the beam (i.e., the number of consecutive random access preamble transmissions corresponding to the beam), indication information on whether random access contention has been detected, and indication information on whether the reference signal received strength (RSRP) of the beam corresponding to the random access resource used by the random access attempt is higher than a configured threshold. The RA report of version 17 adds RA information for the two-step random access process, including: fallback information for the two-step random access process to the four-step random access process, downlink quality measured by the UE before the two-step random access process is triggered, etc. The RA report of version 18 enhances the RACH partition and includes relevant information about the RACH partition. For example, the triggeredFeatureCombination information element is used in the RA report to indicate whether the features that trigger the random access include low-capability RedCap, small data transmission (SDT), message 3 repetition, and network slicing identification; the usedFeatureCombination information element is used in the RA report to indicate whether the features associated with the RA resources used in the random access process include low-capability RedCap, SDT, message 3 repetition, and network slicing identification.

[0046] The RA information contained in the CEF report is the perRAInfoList information element; the RA information contained in the RLF report is the ra-InformationCommon information element.

[0047] Message 1 in the CE mechanism is repeated:

[0048] The 3GPP working group is currently discussing and standardizing the CE mechanism. The conclusion reached so far is that during random access, the UE determines, based on the network's configuration, whether Message 1 repetitions apply to a random access procedure. If so, it further determines the number of Message 1 repetitions.

[0049] Message 1 repetitions on the same beam currently support a four-step random access procedure. RACH resources with and without Message 1 repetitions are different. For contention-based RA, the network broadcasts RSRP thresholds corresponding to different repetition counts. Current 3GPP specifications support Message 1 repetition counts of 2, 4, and 8. The UE determines the number of Message 1 repetitions in the RA process based on its measured downlink RSRP and the configured RSRP threshold. For example, if the RSRP referenced by the downlink path loss at the time the UE initiates the RA process is lower than the RSRP threshold corresponding to the configured repetition count of 8, the UE considers repetition count 8 applicable to the current RA process. Otherwise, if the RSRP referenced by the downlink path loss at the time the UE initiates the RA process is lower than the RSRP threshold corresponding to the configured repetition count of 4, the UE considers repetition count 4 applicable to the current RA process. Otherwise, if the RSRP referenced by the downlink path loss at the time the UE initiates the RA process is lower than the RSRP threshold corresponding to the configured repetition count of 2, the UE considers repetition count 2 applicable to the current RA process. For the non-contention message 1 repetition during synchronous reconfiguration, the network side explicitly configures the number of message 1 repetitions. Figure 3 shows a schematic diagram of the random access process with a message 1 repetition number of 2. The UE uses a repetition number of 2 to send the random access preamble. When the RA process is not for system information request or is not non-contention, the system also supports fallback from a low repetition number to a high repetition number in the RACH resource set associated with the same feature. This fallback is achieved by defining a maximum message 1 repetition for preamble transmission, such as the preambleTransMax-Msg1-Repetition information element. The network side configures the maximum number of times the UE sends an RA preamble with a given message 1 repetition number before changing to the next available message 1 repetition with a higher message 1 repetition number through this information element.

[0050] The characteristics of the random access process using the Message 1 repetition mechanism described above distinguish it from traditional random access processes. For example, whether the UE uses Message 1 repetition is configured by the network, and the number of message repetitions used is determined by the network or by the UE based on the network link status. The random access feature of Message 1 repetition is implemented as a RACH resource feature or feature combination. The RA report currently being developed in Release 18 only contains a simple indication of the RACH resource feature or feature combination used, which is obviously insufficient for the network to obtain sufficient information about the random access process using Message 1 repetition. Differentiated collection and recording of RA reports in different scenarios and more refined network status monitoring can enable the network to obtain more refined and accurate information about network parameters, such as random access parameters in different scenarios. How to record the corresponding RA information in the RA report for the random access process using Message 1 repetition performed in the CE scenario has become a problem of concern in this disclosure.

[0051] The following embodiments provide solutions based on the above problems

[0052] Example 1

[0053] This embodiment provides an RA reporting method for a random access process. Through the method described in this embodiment, the UE records the corresponding message 1 repetition-specific random access information for the random access process that applies message 1 repetition in the CE scenario, so that the network side can obtain the relevant information of the message 1 repetition used in the random access process, such as the number of repetitions, when retrieving the random access report from the UE side, and perform the optimization of the corresponding random access parameters based on this. For example, if the number of message 1 repetitions falls back in more than a certain number of random access processes that use message 1 repetitions, the network side may believe that the RSRP threshold value configured for determining the number of repetitions is inappropriate, and thus try to configure a higher or lower RSRP threshold value to reduce the probability of fallback of the number of message 1 repetitions in the UE random access process, thereby improving the success probability and delay of the random access process.

[0054] The following describes in detail the RA reporting method in Embodiment 1. FIG4 is a schematic flow chart showing the RA reporting method in Embodiment 1 of the present invention.

[0055] In step 110 of this embodiment, the UE completes a random access procedure.

[0056] Optionally, completing the random access process refers to successfully completing a random access process.

[0057] Optionally, the completed random access procedure refers to a failed random access procedure.

[0058] Optionally, completing the random access procedure refers to successfully or unsuccessfully completing an on-demand system information acquisition procedure.

[0059] Optionally, the completion of the random access process refers to the successful completion or failure of a small data transmission (SDT) process or a random access process triggered by SDT or a random access SDT process (RA-SDT process).

[0060] Step 120: The UE adds a new entry to the RA report variable (e.g., VarRA-Report), which includes one or more combinations of the following information associated with the random access procedure described in step 110. Specifically, the UE includes the corresponding RA information in the RA report by performing one or more of the following operations. This embodiment does not limit the order in which the UE performs the following operations.

[0061] Operation 1: The UE includes first RA information in an RA report. The first RA information is used to indicate the first repetition count used in the random access procedure. Alternatively, the first RA information is used to indicate the number of Message 1 repetitions used in the first random access preamble (attempt) in the random access procedure, or the number of initial Message 1 repetitions of the random access procedure. The repetition count refers to the number of Message 1 repetitions. Optionally, the first RA information is included in the triggeredFeatureCombination information element.

[0062] Operation 2: The UE includes a second RA message in the RA report. The second RA message is used to indicate the maximum number of preamble transmissions for the Message 1 repetition mechanism configured by the network before changing to a higher repetition number (as configured in the preambleTransMax-Msg1-Repetition information element). The maximum number of preamble transmissions for the Message 1 repetition mechanism configured by the network is used to cause the UE to use the next higher repetition number for Message 1 transmission when the number of preamble transmissions by the UE at a given repetition number is greater than or equal to the configured maximum number of preamble transmissions for the Message 1 repetition mechanism.

[0063] Optionally, the maximum number of times the Message 1 repetition mechanism preamble is sent, as configured by the network side, is configured in a BWP-UplinkCommon information element or a RACH-ConfigCommon information element. The BWP-UplinkCommon information element is used to configure common parameters for an uplink bandwidth portion (BWP), and the RACH-ConfigCommon information element is used to configure cell-specific random access parameters.

[0064] Operation 3: The UE includes third RA information in the RA report. The third RA information is used to indicate one or more Message 1 repetition times used in the random access process, that is, a list of all Message 1 repetition times (2, 4, 8) used in the random access process.

[0065] For example, if the random access process initially uses a repetition number of 4 and then falls back to using a repetition number of 8, the UE includes the used repetition numbers 4 and 8 as the third RA information in the RA report.

[0066] Operation 4: The UE includes fourth RA information in the RA report. The fourth RA information is used to indicate the number of repetitions of message 1 configured in the contention-free random access procedure.

[0067] Optionally, the fourth RA information is set to the value of msg1-RepetitionNum in RACH-Configdedicated. RACH-Configdedicated is used to configure dedicated RACH parameters.

[0068] Optionally, if the random access procedure is triggered by a physical downlink control channel order (PDCCH order), the fourth RA information is set to the value of msg1-RepetitionNum in the PDCCH order. The PDCCH order is sent by the network side to the UE to trigger the UE to perform a random access procedure.

[0069] Operation 5: The UE includes the fifth RA information in the RA report. The fifth RA information includes a RACH partition configuration information list. Each item in the list includes the index value of the first preamble corresponding to a RACH partition and / or the number of consecutive preambles starting from the first starting preamble for each SSB corresponding to the partition. Each item in the list corresponds to a message 1 repetition number. For example, message 1 repetition number 2 corresponds to an item in the list, message 1 repetition number 4 corresponds to an item in the list, and message 1 repetition number 2 corresponds to an item in the list. Optionally, the list contains one, two or three items.

[0070] Operation 6: If the random access procedure applies repetition of Message 1, the UE includes sixth RA information in the RA report. The sixth RA information is the downlink path loss reference RSRP value when the UE initiates the random access procedure.

[0071] Operation 7: If the random access procedure is repeatedly triggered by Message 1, include seventh RA information in the RA report. The seventh RA information indicates that the random access procedure is repeatedly triggered by Message 1. Optionally, the seventh RA information is represented by the msg1-Repetitions information element and included in the triggeredFeatureCombination information element. The triggeredFeatureCombination information element indicates one or more random access resource features that triggered the current random access procedure.

[0072] Furthermore, optionally, the seventh RA message is used to indicate that the random access procedure is triggered by message 1 being repeated N times (N can be 2, 4, or 8). For example, the seventh RA message is represented by the msg1-RepetitionNum information element, indicating the specific number of repetitions. In this case, the seventh RA message can implement the function of the first RA message.

[0073] Operation 8: If the message 1 repetition is part of the feature combination used in the random access process, the eighth RA information is included in the RA report. The eighth RA information is used to indicate that the random access resource characteristics associated with the random access resources used in the random access process include message 1 repetition. Optionally, the eighth RA information is included in the usedFeatureCombination information element. Further, optionally, the eighth RA information is used to indicate that the random access resource characteristics associated with the random access resources used in the random access process are that the number of message 1 repetitions is N (N can be 2 or 4 or 8). If the eighth RA information is represented by the msg1-RepetitionNum information element, the specific number of repetitions is indicated. Optionally, the eighth RA information indicates a list of specific repetition numbers, such as represented by a list of msg1-RepetitionNum information elements, in which case each item in the list indicates that the random access resource characteristics associated with the random access resources used in the random access process are that the number of message 1 repetitions is N. At this time, the eighth RA information can implement the function of the third RA information, that is, the eighth RA information is another way of expressing the third RA information.

[0074] Operation 9: The UE includes the ninth RA information in the RA report. The ninth RA information is used to indicate the maximum value of the number of repetitions of the message 1 repetition used in the random access procedure. For example, if the number of repetitions of the message 1 repetition characteristic used in the random access procedure is 2 and 4, then the ninth RA information indicates that the maximum number of repetitions of the message 1 repetition characteristic used in the random access procedure is 4. Optionally, the UE includes the ninth RA information in the RA report only when the value of the ninth RA information is different from the seventh or first RA information; that is, the UE includes the ninth RA information in the RA report only when more than one number of repetitions of the message 1 repetition characteristic is used in the random access procedure.

[0075] Operation 10: The UE includes the tenth RA information in the RA report. The tenth RA information is used to indicate whether the number of repetitions of message 1 used in the random access process has fallen back from a low repetition number to a high repetition number, such as from repetition number 2 to repetition number 4, or from repetition number 4 to repetition number 8. Optionally, if the repetition number falls back, the tenth RA information is set to True; otherwise, the tenth RA information is not included in the RA report. Optionally, the tenth RA information is used to distinguish random access preamble attempts, that is, the UE determines whether to include the tenth RA information for each random access preamble attempt.

[0076] Operation 11: The UE includes the eleventh RA information in the RA report. The eleventh RA information is used to indicate the number of fallbacks from a low repetition count to a high repetition count for the repetition count of message 1 used in the random access process. For example, if the random access process only has one fallback from repetition count 2 to repetition count 4, the eleventh RA information is set to 1. If the random access process has one fallback from repetition count 2 to repetition count 4 and then another fallback from repetition count 4 to repetition count 8, the eleventh RA information is set to 2.

[0077] Operation 12: The UE includes the twelfth RA information in the RA report. The twelfth RA information is used to indicate that the number of repetitions of message 1 used in the random access process has rolled back from a low repetition number M to a high repetition number N. Optionally, M or N is 2, 4 or 8. For example, if the number of repetitions of message 1 in the random access process has rolled back from repetition number 2 to repetition number 4, the twelfth RA information indicates that the number of repetitions of message 1 in the random access process has rolled back from repetition number 2 to repetition number 4. Optionally, the twelfth RA information is used to distinguish random access preamble attempts, that is, the UE determines whether to include the twelfth RA information for each random access preamble attempt.

[0078] Apparently, the UE performs the above operation when Message 1 repetition is applied in the random access procedure being performed. Optionally, the UE performs the above operation when the triggeredFeatureCombination information element or the usedFeatureCombination information element in the RA report contains Message 1 repetition (msg1-Repetition). The triggeredFeatureCombination information element is used to indicate all RACH resource features that triggered the random access procedure; the usedFeatureCombination information element is used to indicate one or more features in the RACH resource feature combination associated with the RA resources used in the random access procedure.

[0079] The RACH resource characteristics in the present disclosure may also be referred to as RACH characteristics, RA characteristics, RA partition characteristics, RACH partition characteristics or characteristics, etc. The message 1 repetition used in the random access process refers to the message 1 repetition characteristic associated with the random access resource used in the random access process or the number of repetitions of the message 1 repetition characteristic.

[0080] Example 2

[0081] This embodiment provides a method for reporting RA reports on a UE. Using this method, the UE can report information related to Message 1 repetitions to the base station in an RA report, thereby providing more accurate RA information to the network. This embodiment also provides a method for the signaling process when a UE reports the RA report described in the preceding embodiment through an RRC process.

[0082] FIG5 is a schematic flow chart showing the information reporting method in Example 2 of the present disclosure. As shown in FIG5 , the information reporting method in Example 2 of the present disclosure may include the following steps.

[0083] Step 210: The UE receives a UE Information Request message from the network side, which carries an instruction / request for requesting the UE to report the stored RA report.

[0084] Step 220: The UE includes the content of the stored RA report in a UE Information Response message and sends the UE Information Response message to the network side. The RA report included in the UE Information Response message includes at least one or more combinations of the RA information in the above-mentioned embodiment 1 (such as the first RA information to the twelfth RA information).

[0085] FIG6 is a block diagram illustrating a user equipment 10 according to an embodiment of the present disclosure. As shown in FIG6 , the user equipment 10 includes a processor 101 and a memory 102. The processor 101 may include, for example, a microprocessor, a microcontroller, an embedded processor, etc. The memory 102 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. The memory 102 stores program instructions. When executed by the processor 101, the instructions may execute the random access report method described in detail in the present disclosure in the user equipment.

[0086] The program running on the device according to the present disclosure may be a program that controls a central processing unit (CPU) to enable a computer to implement the functions of the embodiments of the present disclosure. The program or the information processed by the program may 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.

[0087] The program for realizing each embodiment function of the present disclosure can be recorded on a computer-readable recording medium. The corresponding function can be realized by making a computer system read the program recorded on the recording medium and executing these programs. The so-called "computer system" herein can be a computer system embedded in the device, and can include an operating system or hardware (such as a 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.

[0088] 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 case where new integrated circuit technologies have emerged to replace existing integrated circuits due to advances in semiconductor technology, one or more embodiments of the present disclosure may also be implemented using these new integrated circuit technologies.

[0089] Furthermore, the present disclosure is not limited to the above-described embodiments. Although various examples of the embodiments have been described, the present disclosure is not limited thereto. Fixed or non-mobile electronic devices installed indoors or outdoors can be used as terminal devices or communication devices, such as AV equipment, kitchen equipment, cleaning equipment, air conditioners, office equipment, vending machines, and other household appliances.

[0090] As described above, the embodiments of the present disclosure have been described in detail with reference to the accompanying drawings. However, the specific structure is not limited to the above-mentioned embodiments, and the present disclosure also includes any design changes that do not deviate from the main purpose of the present disclosure. In addition, various modifications can be made to the present disclosure 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 disclosure. In addition, components with the same effect described in the above-mentioned embodiments can be replaced with each other.

Claims

1. A random access RA reporting method, comprising: The user equipment UE performs a random access RA procedure using message 1 repetition related; The UE determines that the RA process is completed; and The UE stores the RA information related to message 1 repetition in the RA report, The saving of message 1 repetition-related RA information comprises one or more of the following operations: Operation 1: The UE includes in the RA report first RA information indicating the first number of repetitions used in the random access procedure; Operation 2: The UE includes in the RA report second RA information for indicating the maximum number of preamble transmissions of the number of repetitions of message 1 before changing to a higher number of repetitions configured by the network side; Operation 3: The UE includes in the RA report third RA information indicating the number of repetitions of one or more messages 1 used in the random access procedure; Operation 4: The UE includes in the RA report fourth RA information indicating the number of repetitions of message 1 configured in the contention-free random access process; Operation 5: The UE includes in the RA report fifth RA information indicating a list of random access channel RACH partition configuration information, where each item in the list includes an index value of a first preamble corresponding to a RACH partition and / or the number of consecutive preambles starting from a first start preamble of each synchronization information block SSB corresponding to the partition; Operation 6: If the random access procedure applies message 1 repetition, the UE includes in the RA report the sixth RA information for indicating the downlink path loss reference RSRP value when initiating the random access procedure; Operation 7: The UE includes in the RA report the seventh RA information indicating that the random access procedure is repeatedly triggered by message 1, and includes it in the triggeredFeatureCombination information element; Operation 8: if the message 1 repetition is part of the feature combination used in the random access procedure, the RA report includes eighth RA information indicating that the features used in the random access procedure include the message 1 repetition, and includes it in the usedFeatureCombination information element; Operation 9: The UE includes in the RA report ninth RA information indicating the highest value of the number of repetitions of message 1 used in the random access procedure; Operation 10: The UE includes tenth RA information in the RA report, where the tenth RA information is used to indicate whether the number of repetitions of message 1 used in the random access process has fallen back from a low number of repetitions to a high number of repetitions; Operation 11: The UE includes eleventh RA information in the RA report, where the eleventh RA information is used to indicate the number of fallbacks from a low number of repetitions to a high number of repetitions of message 1 used in the random access procedure; Operation 12: The UE includes twelfth RA information in the RA report, where the twelfth RA information is used to indicate that the number of repetitions of message 1 used in the random access process falls back from a low repetition number M to a high repetition number N, where M or N is 2, 4 or 8.

2. The RA reporting method according to claim 1, wherein: The second RA information is set to the value of the preambleTransMax-Msg1-Repetition information element, and the value of the preambleTransMax-Msg1-Repetition information element is configured by the network side in the BWP-UplinkCommon information element or in the RACH-ConfigCommon information element; wherein the BWP-UplinkCommon information element is used to configure common parameters of an uplink bandwidth part BWP, and the RACH-ConfigCommon information element is used to configure cell-specific random access parameters.

3. The RA reporting method according to claim 1, wherein: The fourth RA information is set to the value of msg1-RepetitionNum in the RACH-Configdedicated information element; or, If the random access process is triggered by a physical downlink control channel PDCCH command, the fourth RA information is set to the value of msg1-RepetitionNum in the PDCCH command; wherein, The RACH-Configdedicated information element is used to configure dedicated random access parameters.

4. The RA reporting method according to claim 1, wherein: The seventh RA information is represented by the msg1-Repetitions information element and included in the triggeredFeatureCombination information element, wherein the triggeredFeatureCombination information element is used to indicate one or more random access resource characteristics that trigger the current random access procedure.

5. The RA reporting method according to claim 1, wherein: When the value of the ninth RA information is different from the seventh or first RA information, the UE includes the ninth RA information in the RA report; or, The UE includes the ninth RA information in the RA report only when more than one repetition number of the message 1 repetition characteristic is used in the random access process.

6. The RA reporting method according to claim 1, wherein: The tenth RA information is used to distinguish random access preamble attempts. The UE determines whether each random access preamble attempt contains the tenth RA information.

7. The RA reporting method according to claim 1, wherein: The twelfth RA information is used to distinguish random access preamble attempts. The UE determines whether to include the twelfth RA information for each random access preamble attempt.

8. The RA reporting method according to claim 1, wherein: The UE receives a UE information request UEInformationRequest message from the base station, which includes an instruction for requesting the UE to report the stored RA report; Based on the instruction, the UE includes the stored RA report including one or more of the first RA information to the twelfth RA information in a UE information response UEInformationResponse message and sends it to the base station.

9. A user equipment UE, comprising: processor; as well as A memory storing instructions; The instructions, when executed by the processor, perform the RA reporting method according to any one of claims 1 to 8.

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