Random access reporting method and user equipment

Abstract

The present disclosure provides a random access (RA) reporting method and a user equipment (UE). The RA reporting method comprises: a UE executes an RA procedure; the UE determines that the RA procedure is completed; and the UE saves power-related RA information in an RA report, the power-related RA information comprising at least one of the following information: information used for indicating whether power boosting is executed in an RA preamble attempt, and information used for indicating the number of times of power boosting in the RA procedure.

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 extracting relevant network optimization parameters from drive test data collected from UEs, operators can analyze this data to understand the status of network deployment and operations, enabling them to make decisions on how to improve network operations. MDT's primary application scenarios include coverage optimization, capacity optimization, mobility management optimization, QoS parameter optimization, and common channel parameter configuration optimization.

[0004] In NR systems of Release 17 and earlier versions, 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 present disclosure aims to solve the problem of random access information reporting in NR networks, and further, to solve the problem of RA reporting containing power information.

[0006] Summary of the Invention

[0007] The main purpose of the present disclosure is to provide an RA reporting method and user equipment, which can realize the reporting of power-related RA information.

[0008] According to a first aspect of the present disclosure, an RA reporting method is provided, including: a user equipment UE performs a random access RA process; the UE determines that the RA process is completed; and the UE saves power-related RA information in the RA report, wherein the saving of the power-related RA information includes one or more of the following operations: operation 1: including first RA information in the RA report, the first RA information being used to indicate whether the random access preamble attempt performs a power boost; operation 2: including second RA information in the RA report, the second RA information being used to indicate whether the random access preamble attempt performs a power boost pause; operation 3: including third RA information in the RA report, the third RA information being used to indicate the total number of power boosts in the random access process; operation 4: including fourth RA information in the RA report, the fourth RA information being used to indicate whether the random access preamble attempt performs a power boost pause. The total number of power increase suspensions during the process; Operation 5: The RA report includes fifth RA information, which is used to indicate whether the MAC layer of the UE has received a notification of a power increase counter suspension from the physical layer before a random access preamble attempt; Operation 6: The RA report includes sixth RA information, which is used to indicate whether the MAC layer of the UE has not received a power increase counter suspension notification from the physical layer before a random access preamble attempt; Operation 7: The UE includes seventh RA information in the RA report, which is used to indicate the random access preamble target power information associated with the random access process; Operation 8: The UE includes eighth RA information in the RA report, which is used to indicate the power increase step information used in the random access process; Operation 9: The RA report includes ninth RA information. The ninth RA information is used to indicate the PRACH configuration index value corresponding to the PRACH resource used by the random access process.

[0009] In the RA reporting method of the first aspect above, the completion of the RA process means that the UE successfully completes a random access process, or successfully or unsuccessfully completes a demand-based system information acquisition process, or fails to complete a small data transmission SDT process.

[0010] In the RA reporting method of the first aspect above, if the UE adds 1 to the power boost counter PREAMBLE_POWER_RAMPING_COUNTER when performing the Nth random access preamble attempt, it is considered that power boosting is performed on the Nth random access preamble; or if the UE does not add 1 to the power boost counter PREAMBLE_POWER_RAMPING_COUNTER when performing the Nth random access preamble attempt, it is considered that power boost suspension is performed on the Nth random access preamble.

[0011] In the RA reporting method of the first aspect, the third RA information is the value of a power ramp-up counter PREAMBLE_POWER_RAMPING_COUNTER of the random access procedure at a media access control (MAC) layer.

[0012] In the RA reporting method of the first aspect, the seventh RA information is configured by a preambleReceivedTargetPower information element of a radio resource control (RRC) layer applied in the random access procedure.

[0013] In the RA reporting method of the first aspect, the eighth RA information is configured by the powerRampingStep information element, the msgA-PreamblePowerRampingStep information element, or the powerRampingStepHighPriority information element applied in the random access procedure.

[0014] 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 ninth RA information in a UE information response UEInformationResponse message and sends it to the base station.

[0015] 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.

[0016] Effects of the Invention

[0017] According to the RA reporting method and user equipment performed by the user equipment of the present disclosure, the UE carries information related to power boost and power configuration in the RA report, so that the network side can more accurately know the power information of each preamble transmission and the number of power boosts during the entire random access process. Based on this information, the network side can determine whether the configured random access-related power parameters (such as the random access preamble target power or power boost step described above) are appropriate, thereby adjusting unreasonable power parameters to improve the success probability of the random access process and shorten the duration of the random access process. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] 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:

[0019] FIG1 is a schematic flow chart of a four-step contention-based random access process.

[0020] FIG2 is a schematic flow chart of a non-contention-based random access process.

[0021] FIG3 is a schematic flowchart showing the RA reporting method in the first embodiment of the present invention.

[0022] FIG4 is a schematic flowchart showing the RA reporting method in the second embodiment of the present invention.

[0023] FIG5 shows a block diagram of a user equipment according to an embodiment of the present disclosure. DETAILED DESCRIPTION

[0024] 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.

[0025] In this disclosure, the terms "include" and "including" and their derivatives mean inclusion without limitation; the term "or" is inclusive, meaning and / or.

[0026] 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.

[0027] 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, such as an LTE system connected to a 5G core network.

[0028] The base station in this disclosure can be any type of base station, including Node B, enhanced base station (eNB), 5G communication system base station (gNB); or micro base station, pico base station, macro base station, home base station, etc. The network side generally refers to a base station or cell. The cell can also be a cell under any of the above base station types. Unless otherwise specified, cell, beam, and transmission point (TRP) are interchangeable. The base station can also be the gNB-Central Unit (gNB-CU) or gNB-Distributed Unit (gNB-DU) that constitutes the base station. Different embodiments can also work in conjunction with each other; for example, the same variables, parameters, and terms in different embodiments have the same interpretation. Cancel, release, delete, clear, and purge are interchangeable. Execute, use, and apply are interchangeable. Configure and reconfigure are interchangeable. Monitor and detect are interchangeable. Initiate and trigger are interchangeable.

[0029] 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.

[0030] 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.

[0031] 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.

[0032] Random access RA process:

[0033] 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.

[0034] 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. Upon successful receipt of Message 2, which is associated with Message 1, the UE considers the CFRA process successfully completed. CFRA typically involves 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 (NR) versions R16 and later introduce a two-step random access process, consisting of Message A and Message B. Steps 1 and 3 of the four-step random access process are combined into a single step, called Message A. Message A contains a random access preamble and the associated Physical Uplink Shared Channel (PUSCH) payload. The PUSCH payload is identical to that contained in Message 3 and can include RRC messages, user plane data, MAC control elements such as buffer status reports, and UE identification. Steps 2 and 4 are combined into a single step, called Message B.Message B is a response to message A during the two-step random access process. The content it contains is similar to that of messages 2 and 4 above, and may include a response for contention resolution (contention resolution identifier, random access preamble identifier, UE identifier, etc.), a fallback indication, a backoff indication, a time advance command, an uplink permission, and may also include a response RRC message corresponding to the RRC message contained in the response message A, etc.

[0035] In a random access process, the random access preamble can be sent multiple times until the random access process is successful. The network side controls the transmission power of the preamble by configuring the following parameters: the random access preamble receive target power (configured by the preambleReceivedTargetPower information element in four-step random access and by the msgA-PreambleReceivedTargetPower information element in two-step random access) and the power ramping step (configured by the powerRampingStep information element in four-step random access and by the msgA-PreamblePowerRampingStep information element in two-step random access and by the powerRampingStepHighPriority information element in the priority random access process). The UE determines the receive target power of the random access preamble according to the following formula:

[0036] PREAMBLE_RECEIVED_TARGET_POWER=preambleReceivedTargetPower+DELTA_PREAMBLE+(PREAMBLE_POWER_RAMPING_COUNTER-1)×PREAMBLE_POWER_RAMPING_STEP+POWER_OFFSET_2STEP_RA;wherein, PREAMBLE_RECEIVED_TARGET_POWER variable represents the random access preamble receive target power to be determined by the UE; preambleReceivedTargetPower edTargetPower is the random access preamble target power configured by the RRC layer; DELTA_PREAMBLE is the power offset value, and different preamble formats correspond to different power offset values; PREAMBLE_POWER_RAMPING_COUNTER is a counter maintained on the UE for counting the number of power increases; PREAMBLE_POWER_RAMPING_STEP is the power increase step determined according to the power increase step parameter configured by the RRC layer; POWER_OFFSET_2STEP_RA is the power offset value when two-step random access falls back to four-step random access.

[0037] The UE side can increase the power when sending the random access preamble. The variable PREAMBLE_POWER_RAMPING_COUNTER is used to record the number of UE power increases. When the following conditions are met at the same time, the UE increases the variable by 1, that is, the power used for the random access preamble is increased by one step: Condition 1: No notification of power increase suspension is received from the bottom layer; Condition 2: No Listen Before Talk (LBT) failure indication is received from the bottom layer for the previous random access preamble; Condition 3: The selected beam (such as Synchronization Signal Block (SSB) or Channel State Information Reference Signal (CSI-RS)) has not changed from the beam selected for the previous random access preamble.

[0038] Random access RA report:

[0039] In the current NR system, there are three main scenarios in which the UE reports RA information to the network.

[0040] In the first type of RA information report, the UE records the RA information of each completed 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.

[0041] The second type of RA information report is the Connection Establishment Failure (CEF) report. If the initial access fails (RRC connection establishment or RRC connection recovery), 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.

[0042] The third type of RA information-related report is 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 store the corresponding random access information. The UE variable VarRLF-Report is used to store the RLF report information.

[0043] Generally speaking, an RA report refers to the first type of RA information report mentioned 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 mentioned above. The RA report described in this disclosure can also be applied to the second or third type of RA information report mentioned above, or other reports named after them, reported by the UE to the network side.

[0044] 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.

[0045] NR systems released in Release 16 and later adopt the aforementioned framework from LTE and enhance it to take advantage of 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. Even after entering the RRC idle or inactive state, the UE retains previously generated RA reports. The UE can send these stored RA reports to the network upon re-entering the connected state.

[0046] When the UE successfully 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. The information corresponding to a random access procedure may include: information about the cell where the random access preamble is sent (global cell identifier, tracking area code or physical cell identifier and carrier frequency), random access purpose information, special cell identifier corresponding to the random access procedure, and random access common information. The random access common information includes reference downlink frequency information associated with the random access procedure (such as the absolute frequency of PointA, subcarrier spacing, bandwidth location information locationAndBandwidth, etc.) and RA information associated with each random access attempt arranged in chronological order. 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), an indication of whether random access contention has been detected, and an indication of whether the Reference Signal Received Power (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 in Release 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, and the downlink quality measured by the UE before the two-step random access process is triggered.

[0047] The current RA report does not take into account the factor of random access preamble power boost suspension. The relevant information of each random access preamble attempt is recorded in the RA report in the order of time (perRAInfoList information element). The network side can assume that the UE has performed a power boost before each random access preamble retransmission. Therefore, based on the order and the number of preamble transmissions in the perRAInfoList information element, the network side can calculate the power information of each preamble transmission and the number of power boosts during the entire random access process. Based on this information, the network side can determine whether the configured random access-related power parameters (such as the random access preamble target power or power boost step mentioned above) are appropriate, so as to adjust unreasonable power parameters to increase the success probability of the random access process and shorten the duration of the random access process. In the discussion on random access information for NR-U at the RAN2#122 meeting, the RAN2 working group reached a conclusion: to add a flag to the RA report, which is used to indicate whether an LBT failure occurred before the beam change corresponding to the random access preamble attempt. This is mainly because LBT failure and beam change will cause the power boost to be suspended, while in the RA report of version 17, the network side assumes that the power will be increased for each preamble retransmission, and it cannot obtain relevant information about whether the power is actually increased or suspended from the RA report of version 17. Then, as mentioned above, the UE will only increase the power boost counter by one and perform power boost on the next transmitted preamble when all three conditions are met (condition 1: no notification of power boost suspension is received from the bottom layer; condition 2: no LBT failure indication is received from the bottom layer for the previous random access preamble; condition 3: the selected beam is the same as the beam selected for the previous random access preamble). The flag reached by the RAN2 working group to indicate whether an LBT failure occurred before the beam change corresponding to the random access preamble attempt cannot cover these three conditions. The network side cannot know whether the power boost was performed for each random access preamble attempt based on the RA report containing this flag. Therefore, how to enhance the RA report so that the network side can obtain power-related information during the random access process becomes a problem of concern in this disclosure.

[0048] The present disclosure mainly proposes a solution to the problem related to the power information in the above-mentioned RA report. Through the solution described in the present disclosure, the UE carries information related to power boost and power configuration in the RA report, so that the network side can more accurately know the power information of each preamble transmission and the number of power boosts during the entire random access process. Based on this information, the network side can determine whether the configured random access-related power parameters (such as the random access preamble target power or power boost step mentioned above) are appropriate, thereby adjusting unreasonable power parameters to improve the success probability of the random access process and shorten the duration of the random access process.

[0049] Example 1

[0050] This embodiment provides a random access reporting method performed on a UE.

[0051] In this embodiment, the UE includes in the RA report an indication of whether a power boost was performed for each random access preamble attempt or information such as the number of power boosts during the random access process, so that the network side can obtain the power boost information of each random access preamble or the power boost information during the entire random access process.

[0052] As an example, as shown in FIG3 , this embodiment may include the following steps.

[0053] Step 110: The UE completes a random access procedure.

[0054] Optionally, completing the random access process refers to successfully completing a random access process.

[0055] Optionally, completing the random access procedure refers to successfully or unsuccessfully completing an on-demand system information acquisition procedure.

[0056] Optionally, the completion of the random access procedure refers to the failed completion of a Small Data Transmission (SDT) procedure or a random access procedure triggered by the SDT.

[0057] 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.

[0058] Operation 1: The UE includes the first RA information in the RA report. The first RA information is used to indicate whether the random access preamble attempt has performed a power boost. Optionally, the first RA information is used to distinguish each random access preamble attempt, that is, each random access preamble attempt corresponds to a first RA information. Optionally, the first RA information indicates that the random access preamble attempt has performed a power boost. Optionally, only when a random access preamble attempt has performed a power boost, the corresponding first RA information will be included in the RA report. Optionally, if the UE adds 1 to the power boost counter PREAMBLE_POWER_RAMPING_COUNTER when performing the Nth random access preamble attempt, it is considered that a power boost has been performed on the Nth random access preamble.

[0059] Operation 2: The UE includes the second RA information in the RA report. The second RA information is used to indicate whether the random access preamble attempt has performed a power boost suspension (i.e., whether it is the same as the PREAMBLE_RECEIVED_TARGET_POWER used in the last random access preamble). Optionally, the second RA information is used to distinguish each random access preamble attempt, that is, each random access preamble attempt corresponds to a second RA information. Optionally, the second RA information indicates that the random access preamble attempt has performed a power boost suspension. Optionally, only when a random access preamble attempt has performed a power boost suspension, the corresponding second RA information will be included in the RA report. Optionally, if the UE does not add 1 to the power boost counter PREAMBLE_POWER_RAMPING_COUNTER when performing the Nth random access preamble attempt, it is deemed that a power boost suspension has been performed on the Nth random access preamble.

[0060] Operation 3: The UE includes the third RA information in the RA report. The third RA information is used to indicate the total number of power boosts in the random access process. Optionally, the third RA information is for the entire random access process, and refers to the total number of power boosts in the entire random access process. Optionally, the third RA information is for each beam (SSB or CSI-RS), and refers to the total number of power boosts for the random access preamble related to the beam. Optionally, the third RA information corresponds to the value of the power boost counter PREAMBLE_POWER_RAMPING_COUNTER of the MAC layer of the random access process. Optionally, if the UE performs a power boost when performing the N+1th random access preamble attempt compared with the previous random access preamble attempt, that is, when performing the N+1th random access preamble attempt, the UE adds 1 to the power boost counter PREAMBLE_POWER_RAMPING_COUNTER, it is considered as a power boost.

[0061] Operation 4: The UE includes the fourth RA information in the RA report. The fourth RA information is used to indicate the total number of power boost suspensions in the random access process. Optionally, the fourth RA information is for the entire random access process, and refers to the total number of power boost suspensions in the entire random access process. Optionally, the fourth RA information is for each beam (SSB or CSI-RS), and refers to the total number of power boost suspensions for the random access preamble associated with the beam. Optionally, if the UE performs a power boost suspension when performing the N+1th random access preamble attempt compared with the previous random access preamble attempt, that is, when performing the N+1th random access preamble attempt, the power boost counter PREAMBLE_POWER_RAMPING_COUNTER is not increased by 1, it is considered to be a power boost suspension.

[0062] Operation 5: The UE includes the fifth RA information in the RA report. The fifth RA information is used to indicate whether the MAC layer of the UE has received a notification of a suspend power increase counter from the physical layer before a random access preamble attempt. Optionally, the fifth RA information is distinguished for each random access preamble attempt, that is, each random access preamble attempt corresponds to a fifth RA information. Optionally, only when the MAC layer of the UE has received a notification of a suspend power increase counter from the physical layer before a random access preamble attempt, the corresponding fifth RA information is included in the RA report for the random access preamble attempt. Optionally, the UE determines whether the MAC layer of the UE has received a notification of a suspend power increase counter from the physical layer before the Nth random access preamble attempt, which means that the UE determines whether the MAC layer of the UE has received a notification of a suspend power increase counter from the physical layer after the N-1th random access preamble attempt and before the Nth random access preamble attempt. That is, for each random access preamble, the UE determines whether the MAC layer of the UE has received a notification of a suspend power increase counter from the physical layer after the most recent (last) preamble attempt. Optionally, the fifth RA information may also include the reason for pausing the power boost counter, such as the preamble cannot be sent due to conflict with other channels; or the preamble is sent with reduced power due to limited DC power; or because the preamble uses changed spatial domain transmission filter parameters, etc.

[0063] Operation 6: The UE includes the sixth RA information in the RA report. The sixth RA information is used to indicate whether the MAC layer of the UE has not received the notification of the suspend power boost counter from the physical layer before a random access preamble attempt. Optionally, the sixth RA information is used to distinguish each random access preamble attempt, that is, each random access preamble attempt corresponds to a sixth RA information. Optionally, only when the MAC layer of the UE has not received the notification of the suspend power boost counter from the physical layer before a random access preamble attempt, the corresponding sixth RA information is included in the RA report for the random access preamble attempt. Optionally, for each random access preamble, the UE determines whether the MAC layer of the UE has not received the notification of the suspend power boost counter from the physical layer after the most recent (last) preamble attempt.

[0064] Operation 7: The UE includes seventh RA information in the RA report. The seventh RA information is used to indicate the random access preamble target power information associated with the random access procedure. Optionally, the random access preamble target power information refers to the PREAMBLE_RECEIVED_TARGET_POWER information corresponding to the first random access preamble attempt in the random access procedure at the MAC layer. Optionally, the random access preamble target power information refers to the preambleReceivedTargetPower parameter configured by RRC and applied to the random access procedure.

[0065] Operation 8: The UE includes eighth RA information in the RA report. The eighth RA information is used to indicate the power ramping step information used in the random access procedure. Optionally, the power ramping step information refers to the REAMBLE_POWER_RAMPING_STEP applied to the random access procedure at the MAC layer. Optionally, the power ramping step information is configured by one of the powerRampingStep information element, the msgA-PreamblePowerRampingStep information element, or the powerRampingStepHighPriority information element.

[0066] Operation 9: The UE includes ninth RA information in the RA report. The ninth RA information is used to indicate the PRACH configuration index value corresponding to the RACH parameters or PRACH resources used in the random access procedure. Optionally, the PRACH configuration index value is identified by the prach-ConfigurationIndex information element (for four-step random access) or the msgA-PRACH-ConfigurationIndex information element (for two-step random access).

[0067] Random access preamble transmission, random access preamble attempt, random access attempt, etc. can be used interchangeably and all refer to the transmission of a random access preamble.

[0068] Example 2

[0069] This embodiment provides a method for reporting RA reports executed on a UE. Using the method described in this embodiment, the UE can report power-related information during the random access process to the base station in the RA report, thereby providing more accurate RA information to the network. This embodiment also provides a method for the signaling process when the UE reports the RA report described in the previous embodiment through the RRC process.

[0070] FIG4 is a schematic flow chart showing the information reporting method in Example 2 of the present disclosure. As shown in FIG4 , the information reporting method in Example 2 of the present disclosure may include the following steps.

[0071] 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.

[0072] 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 ninth RA information).

[0073] FIG5 is a block diagram illustrating a user equipment 10 according to an embodiment of the present disclosure. As shown in FIG5 , 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, these instructions may execute the random access reporting method described in detail in the present disclosure in the user equipment.

[0074] 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.

[0075] 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.

[0076] 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.

[0077] 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.

[0078] 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; The UE determines that the RA process is completed; and The UE stores power-related RA information in the RA report, The storing of power-related RA information includes one or more of the following operations: Operation 1: including first RA information in the RA report, where the first RA information is used to indicate whether the random access preamble attempt performs a power boost; Operation 2: including second RA information in the RA report, where the second RA information is used to indicate whether the random access preamble attempt performs a power boost pause; Operation 3: including third RA information in the RA report, where the third RA information is used to indicate a total number of power increases in the random access process; Operation 4: including fourth RA information in the RA report, where the fourth RA information is used to indicate a total number of power boost suspensions in the random access process; Operation 5: including fifth RA information in the RA report, where the fifth RA information is used to indicate whether the media access control MAC layer of the UE has received a notification of suspending the power increase counter from the physical layer before a random access preamble attempt; Operation 6: including sixth RA information in the RA report, where the sixth RA information is used to indicate whether the MAC layer of the UE has not received a notification of suspending the power increase counter from the physical layer before a random access preamble attempt; Operation 7: including seventh RA information in the RA report, where the seventh RA information is used to indicate random access preamble target power information associated with the random access procedure; Operation 8: including eighth RA information in the RA report, where the eighth RA information is used to indicate the power boost step information used in the random access process; Operation 9: Include ninth RA information in the RA report, where the ninth RA information is used to indicate a PRACH configuration index value corresponding to the PRACH resource used in the random access procedure.

2. The RA reporting method according to claim 1, wherein: The RA process is completed when the UE successfully completes a random access process, or Successfully or unsuccessfully completed a requirement-based system information acquisition process, or A small data transfer (SDT) process was completed unsuccessfully.

3. The RA reporting method according to claim 1, wherein: If the UE increases the power ramp-up counter PREAMBLE_POWER_RAMPING_COUNTER by 1 when performing the Nth random access preamble attempt, it is considered that power ramping has been performed on the Nth random access preamble; or If the UE does not increase the power ramp-up counter PREAMBLE_POWER_RAMPING_COUNTER by 1 when performing the Nth random access preamble attempt, it is considered that the power ramp-up suspension is performed on the Nth random access preamble.

4. The RA reporting method according to claim 1, wherein: The third RA information is the value of a power ramp-up counter PREAMBLE_POWER_RAMPING_COUNTER of the random access process at the media access control MAC layer.

5. The RA reporting method according to claim 1, wherein: The seventh RA information is configured by the preambleReceivedTargetPower information element of the radio resource control RRC layer applied in the random access procedure.

6. The RA reporting method according to claim 1, wherein: The eighth RA information is configured by the powerRampingStep information element, the msgA-PreamblePowerRampingStep information element, or the powerRampingStepHighPriority information element used in the random access process.

7. 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 ninth RA information in a UE information response UEInformationResponse message and sends it to the base station.

8. 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 7.

Images