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WO2018171577A1 - 基站、用户设备和相关方法 - Google Patents

基站、用户设备和相关方法 Download PDF

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Publication number
WO2018171577A1
WO2018171577A1 PCT/CN2018/079581 CN2018079581W WO2018171577A1 WO 2018171577 A1 WO2018171577 A1 WO 2018171577A1 CN 2018079581 W CN2018079581 W CN 2018079581W WO 2018171577 A1 WO2018171577 A1 WO 2018171577A1
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WO
WIPO (PCT)
Prior art keywords
mcg
base station
srb
scg
message
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PCT/CN2018/079581
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English (en)
French (fr)
Inventor
张崇铭
刘仁茂
Original Assignee
夏普株式会社
张崇铭
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
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Publication date
Application filed by 夏普株式会社, 张崇铭 filed Critical 夏普株式会社
Priority to US16/496,087 priority Critical patent/US11219082B2/en
Priority to EP18772355.6A priority patent/EP3606145A4/en
Publication of WO2018171577A1 publication Critical patent/WO2018171577A1/zh

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    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W76/00—Connection management
    • H04W76/10—Connection setup
    • H04W76/19—Connection re-establishment
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W24/00—Supervisory, monitoring or testing arrangements
    • H04W24/08—Testing, supervising or monitoring using real traffic
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W24/00—Supervisory, monitoring or testing arrangements
    • H04W24/10—Scheduling measurement reports ; Arrangements for measurement reports
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W76/00—Connection management
    • H04W76/10—Connection setup
    • H04W76/15—Setup of multiple wireless link connections
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W80/00—Wireless network protocols or protocol adaptations to wireless operation
    • H04W80/02—Data link layer protocols
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W84/00—Network topologies
    • H04W84/18—Self-organising networks, e.g. ad-hoc networks or sensor networks

Definitions

  • the present disclosure relates to the field of wireless communication technologies, and more particularly, to a user equipment, a base station, and related methods.
  • the research topic of the new 5G wireless access technology was proposed at the 3rd Generation Partnership Project (3GPP) RAN#64 plenary meeting held in March 2016 (see Non-Patent Document: RP-160671 New SID Proposal: Study on New Radio Access Technology).
  • 3GPP 3rd Generation Partnership Project
  • RAN#64 plenary meeting held in March 2016 see Non-Patent Document: RP-160671 New SID Proposal: Study on New Radio Access Technology.
  • the working frequency band of the new communication system can be extended to 100 GHz, and at the same time, it will meet at least the enhanced mobile broadband service requirements, the communication requirements of massive IoT UEs, and the business requirements of high reliability requirements.
  • the research work of the project will end in 2018.
  • MCG split SRB and SCG SRB can be supported.
  • the MCG split SRB is mainly used to ensure the reliability of the transmission.
  • the control information generated by the MCG base station can be simultaneously sent to the UE through the MCG air interface and the SCG air interface, so that the signaling is repeatedly transmitted and the transmission reliability is provided; and the SCG SRB is used.
  • the timeliness of the control is implemented, because in the traditional LTE DC scenario, the measurement, reconfiguration, and the like of the SCG need to be transmitted to the MeNB through the interface between the MeNB and the SeNB, and sent to the UE by the MeNB, thereby introducing an inevitable Delay.
  • the information such as measurement and reconfiguration can be directly sent to the UE through the SCG SRB through the SCG SRB, ensuring the validity and real-time performance of the link management.
  • R2-1700918 RLM and RLF in case of LTE-NR tight interworking indicate that when the UE detects that the MCG radio link fails, the MCG splits the SRB to notify the MCG base station, so that the MCG base station performs further processing;
  • R2-1701344 Control plane signalling transport for LTE-NR tight interworking it is pointed out that when the UE detects that the MCG radio link fails, the MCG base station can be notified by the SCG SRB, so that the MCG base station performs further processing.
  • the base station can simultaneously configure one or two of the two types of SRBs for the user. In this case, if the UE detects that the wireless link fails in the MCG, how the UE sends the message carrying the MCG radio link failure information is a problem to be solved. Further, in the scenario where the NR is configured with multiple connections, similar problems need to be solved.
  • a method in a user equipment UE the user equipment being configured with one or more signalling radio bearers SRB, including a primary cell group MCG split SRB and/or one or more a cell group SCG SRB, the method comprising: detecting a radio link failure between the UE and the MCG base station; determining, in the configured one or more SRBs, one or a message for transmitting a message related to the radio link failure a plurality of SRBs; and transmitting the message by the determined one or more SRBs.
  • the method further includes receiving an indication from an MCG base station or an SCG base station, the indication being used to determine to transmit the one or more of the MCG split SRB and/or the one or more SCG SRBs. a message, wherein the determining is based at least in part on the received indication.
  • the determining comprises detecting whether the configured one or more SRBs are functioning properly, wherein the one or more SRBs for transmitting the message are determined only from the working SRBs.
  • the determining further comprises detecting a link quality of the normally operating SRB, wherein the one or more SRBs for transmitting the message are determined based on the detected link quality.
  • the method further comprises, after detecting that the wireless link of the MCG base station fails and before transmitting the message: suspending all MCG data radio bearers DRB and suspending transmission of the MCG split SRB at the MCG.
  • a method in a user equipment UE comprising: detecting a radio link failure between a UE and a primary cell group MCG base station; and a physical uplink control channel PUCCH through the secondary cell group SCG or
  • the media access control MAC control unit CE transmits a message related to the radio link failure of the UE and the MCG base station to the SCG base station.
  • a user equipment UE including a transceiver, a processor, and a memory, the processor storing instructions executable by the processor, such that the user equipment performs according to the first or The method of the second aspect.
  • a method in a base station comprising: transmitting an indication to a user equipment UE, the indication being used by the UE to determine to split a signaling radio bearer SRB and/or one through a primary cell group MCG Or one or more of the plurality of secondary cell groups SCG SRBs to transmit a message related to a radio link failure between the UE and the MCG base station.
  • the base station is an SCG base station
  • the method further includes: receiving the message from the UE; determining, by reading the message, that a radio link of the MCG base station fails; and transmitting, to the MCG base station, Notification related to wireless link failure.
  • a base station comprising a transceiver, a processor and a memory, the processor storing instructions executable by the processor such that the base station performs the method according to the above fourth aspect.
  • FIG 1 shows the architecture of the MCG/SCG protocol.
  • FIG. 2 shows a flow diagram of a method in a user equipment in accordance with an embodiment of the disclosure.
  • FIG. 3 illustrates a flow chart of a method in a user equipment in accordance with another embodiment of the present disclosure.
  • FIG. 4 shows a block diagram of a user equipment in accordance with an embodiment of the present disclosure.
  • FIG. 5 shows a flow chart of a method in a base station in accordance with an embodiment of the present disclosure.
  • FIG. 6 shows a block diagram of a base station in accordance with an embodiment of the present disclosure.
  • the present invention is not limited to the following embodiments, but can be applied to more other wireless communication systems, such as an eLTE communication system, and can be applied to other base stations and UE devices, such as base stations and UEs supporting eLTE. device.
  • NR DC scenarios include, but are not limited to, the following combinations:
  • the MCG related base station is an NR base station
  • the SCG related base station is an NR base station.
  • the MCG related base station is an NR base station
  • the SCG related base station is an LTE or eLTE base station.
  • the MCG related base station is an LTE or eLTE base station
  • the SCG related base station is an NR base station.
  • MCG base station MeNB Master eNB primary base station
  • SeNB Secondary eNB secondary base station SCG base station
  • the SRB described in the following refers to a radio signaling bearer for transmitting signaling between a base station and a UE, in particular, control signaling, and may also be used for transmitting a signaling message of a non-access stratum.
  • the MCG split Bearer refers to a radio bearer established between an MCG base station and a UE, and the bearer uses resources of the MCG and the SCG at the same time.
  • One of the implementations of the protocol architecture can be as shown in FIG. 1.
  • the MCG split Bearer used for transmitting control signaling is called MCG split SRB.
  • the SCG bearer refers to the radio bearer established by the SCG base station and the UE, and only uses the resources of the SCG.
  • One of the protocol architecture implementation manners may be as shown in FIG. 1 , where the SCG bearer used for transmitting control signaling is called SCG SRB. ,
  • FIG. 2 shows a flow diagram of a method 200 in a user equipment UE in accordance with an embodiment of the disclosure.
  • the user equipment is configured with one or more signaling radio bearers SRB, including a primary cell group MCG split SRB and/or one or more secondary cell groups SCG SRB.
  • Method 200 includes the following steps.
  • step S210 a radio link failure between the UE and the MCG base station is detected.
  • the radio link between the UE and the MCG base station There are various reasons for the failure of the radio link between the UE and the MCG base station, including but not limited to: continuous MCG physical layer radio link detection out of synchronization; MCG MAC random access failure; MCG SRB/DRB or The RLC layer of the MCG split SRB/DRB in the MCG indicates that the maximum number of retransmissions is reached/extended, and so on.
  • the terminal detects one or more of the foregoing, it can be considered that the radio link between the UE and the MCG base station fails to be detected, that is, the MCG RLF.
  • one or more SRBs for transmitting a message related to the radio link failure are determined in the configured one or more SRBs.
  • the message is transmitted by the determined one or more SRBs in step S230.
  • the UE may always send a message carrying MCG RLF information through the MCG split SRB.
  • the UE may always send a message carrying the MCG RLF information through the SCG SRB.
  • the method 200 further includes receiving an indication from the MCG base station or the SCG base station, the indication being used to directly or indirectly determine to split the SRB and/or one or more of the one or more SCG SRBs by the MCG. To send the message. In step S220, the determining is based at least in part on the received indication.
  • the UE before transmitting the message carrying the MCG RLF information, the UE receives the information sent by the base station, and carries an indication indicating which type of SRB the UE needs to send (or preferentially transmit) the message carrying the MCG RLF information. Specifically, it may be indicated by 1 bit, 0 means MCG split SRB, 1 means SCG SRB, or vice versa.
  • step S220 the determining includes detecting whether the configured one or more SRBs are working properly, wherein only one or more SRBs for transmitting the message are determined from the working SRBs only .
  • the determining further comprises detecting a link quality of the normally operating SRB, wherein the one or more SRBs for transmitting the message are determined based on the detected link quality.
  • the UE may perform one or more of the following operations.
  • the UE determines whether the MCG split SRB is working properly, and may include, but is not limited to, one or more of the following: determining whether the UE has established the MCG split SRB, or whether the base station configures the MCG split SRB for the UE, or the MCG split SRB. Whether it is in a non-suspended state (ie, working state, no suspend).
  • the normal working basis may include, but is not limited to, one or more of the following aspects: for example, the UE establishes an MCG split SRB, or the base station configures the MCG split SRB for the UE, or The MCG split SRB is in a non-suspended state (ie, no suspend), and the UE sends a message carrying the MCG RLF information on the MCG split SRB.
  • the process of the UE sending the message carrying the MCG RLF information ends.
  • the basis for the abnormal operation may include, but is not limited to, one or more of the following: for example, the UE does not establish an MCG split SRB, or the base station does not configure the MCG split SRB for the UE, or The transmission of the MCG split SRB on the SCG side or the state in which the SCG bearer is in a suspended state (ie, suspend), the optional operations of the UE include but are not limited to the following aspects:
  • Aspect 1 continue to judge whether the SCG SRB is working properly.
  • the UE transmits a message with the MCG RLF information on the SCG SRB; when the SCG SRB works abnormally, the UE cancels the process of sending the message carrying the MCG RLF information or ending the process of sending the message carrying the MCG RLF information, and
  • a request to re-establish a connection is initiated to the base station or a process of re-establishing the connection is triggered.
  • Aspect 2 canceling the process of sending a message carrying the MCG RLF information or ending the process of sending the message carrying the MCG RLF information, and optionally, initiating a request to re-establish a connection to the base station or triggering a process of re-establishing the connection.
  • the UE determines whether the SCG SRB is working normally, and may include, but is not limited to, one or more of the following: determining whether the UE has established the SCG SRB, or whether the base station configures the SCG SRB for the UE, or whether the SCG SRB is not suspended. State (ie working state, no suspend).
  • the basis for the normal operation may include, but is not limited to, one or more of the following aspects: for example, the UE establishes the SCG SRB, or the base station configures the SCG SRB for the UE, or the SCG SRB is in the non- The suspended state (ie, the operational state, no suspend), the UE determines to send a message with MCG RLF information on the SCG SRB.
  • the basis for the normal operation may include but is not limited to one or more of the following: for example, the UE does not establish an SCG SRB, or the base station does not configure the SCG SRB for the UE, or is the SCG SRB or If the SCG bearer is in a suspended state (ie, suspend), the optional operations of the UE include but are not limited to the following aspects:
  • the UE continues to determine whether the MCG split SRB works normally.
  • the UE transmits the message with the MCG RLF information on the MCG split SRB. If the MCG split SRB works abnormally, the UE cancels sending the MCG RLF information.
  • the message either ends the process of sending a message carrying the MCG RLF information, and optionally, initiates a request to re-establish a connection to the base station or triggers a process of re-establishing the connection.
  • Aspect 2 canceling the process of sending a message carrying the MCG RLF information or ending the process of sending the message carrying the MCG RLF information, and optionally, initiating a request to re-establish a connection to the base station or triggering a process of re-establishing the connection.
  • Manner 3 The UE determines whether the SCG SRB and the MCG split SRB are working normally. The specific judgment process is as described above.
  • the UE When the UE determines that only one type of SRB in the MCG split SRB and the SCG SRB is working normally, the UE sends the message carrying the MCG RLF information only on the working SRB;
  • the UE may determine that both the MCG split SRB and the SCG SRB are working normally (non-suspend, no suspend).
  • the UE can compare the radio link quality of the two SCGs, and the UE can select the SRB owned by the SCG with good radio link quality for transmission, for example If the quality of the radio link of the SCG to which the MCG split SRB belongs is better than the quality of the radio link of the SCG to which the SCG SRB belongs, the MCG split SRB is selected for transmission, and vice versa, the SCG SRB is selected for transmission.
  • the UE When the UE determines that both the SCG SRB and the MCG split SRB are working abnormally, the UE cancels the process of sending the message carrying the MCG RLF information or ending the process of sending the message carrying the MCG RLF information, and optionally, initiating a request to re-establish the connection to the base station or Triggers the process of re-establishing a connection.
  • Manner 4 The UE performs judgment according to the type of SRB indicated by the base station, and the specific determination process is as described above. For example, the base station indicates that the message carrying the MCG RLF information is sent (or preferentially transmitted) on the SCG SRB, and the UE first determines whether the SCG SRB works normally, and the subsequent processing flow is the same as that of the second method.
  • the base station may instruct to send (or preferentially transmit) a message carrying the MCG RLF information on the MCG split SRB, and the UE may first determine whether the MCG split SRB is working normally. The next processing procedure is the same as that in the first mode.
  • the UE may be configured with multiple SCGs, which in turn are configured with multiple SCG SRBs, each of which is communicated by a different SCG base station to the UE.
  • the base station configures SCG1 and SCG2, and SCG1 SRB, SCG2 SRB, and MCG split SRB for the UE.
  • Manner 1 The base station indicates that the UE can send a message carrying the MCG RLF information by using the MCG split SRB.
  • the UE After the UE detects the MCG RLF, the UE determines whether the MCG split SRB is working normally (the specific determination process is as described above). If it works normally, the UE sends a message on the MCG split SRB.
  • the UE further determines whether the SCG SRB is working normally.
  • Manner 2 The base station indicates that the UE can send a message carrying the MCG RLF information by using (or preferentially passing through) the SCG SRB.
  • the UE After the UE detects the MCG RLF, the UE determines whether the SCG1 SRB and the SCG2 SRB are working normally (the specific determination process is as described above),
  • the UE randomly selects an SCG SRB to send
  • the UE compares the link quality of the two SCGs, and selects the SCG SRB of the SCG with good radio link quality to transmit,
  • Manner 3 The base station indicates that the UE can send a message carrying the MCG RLF information by using (or preferentially passing) the SCG SRB, and the base station further indicates that the message carrying the MCG RLF information can be sent by (or preferentially passing through) the SCG1 SRB.
  • the UE After the UE detects the MCG RLF, the UE determines whether the SCG1 SRB is working normally (the specific determination process is as described above). If it works normally, the UE sends a message on the SCG1 SRB.
  • the UE further determines whether the SCG2 SRB is working normally, and if it works normally, the UE sends a message on the SCG2 SRB.
  • the UE further determines whether the MCG split SRB is working normally. If it works normally, the UE sends a message on the MCG split SRB.
  • the base station indicates that the UE can send a message carrying the MCG RLF information through the MCG split SRB and the SCG SRB, or the base station does not perform any indication:
  • the UE After the UE detects the MCG RLF, the UE determines whether the MCG splits the SRB, the SCG1 SRB, and the SCG2 SRB to work normally (the specific determination process is as described above).
  • the UE compares the link quality of the SCG and selects the SRB of the SCG with the best radio link quality for transmission.
  • the method 200 further includes: after detecting the failure of the wireless link of the MCG base station and before transmitting the message: suspending all MCG data radio bearers DRB and suspending transmission of the MCG split SRB at the MCG.
  • FIG. 3 illustrates a flow diagram of a method 300 in a user equipment in accordance with another embodiment of the present disclosure.
  • Method 300 includes the following steps.
  • step S310 a radio link failure between the UE and the primary cell group MCG base station is detected.
  • step S320 the physical uplink control channel PUCCH or the medium access control MAC control unit CE of the secondary cell group SCG transmits a message related to the radio link failure of the UE and the MCG base station to the SCG base station.
  • the UE detects that the MCG is RLF, and the UE detects/determines whether the SCG is configured/established. If the SCG is configured/established, the RRC layer of the UE notifies the MAC layer of the SCG, and the MAC layer generates a MAC CE to indicate that the MCG has an RLF. And, optionally, the MAC layer indicates/notifies the PHY layer that the MCG RLF is indicated by the PUCCH sending information.
  • FIG. 4 shows a block diagram of a UE 400 in accordance with an embodiment of the present disclosure.
  • the UE 400 includes a transceiver 410, a processor 420, and a memory 430 that stores instructions executable by the processor 420 such that the user device 400 performs the method described above in connection with FIG. 200.
  • the UE 400 detects a radio link failure between the UE and the MCG base station.
  • the UE 400 determines one or more SRBs for transmitting messages related to the radio link failure in the configured one or more SRBs.
  • the UE 400 transmits the message through the determined one or more SRBs.
  • the UE 400 receives an indication from an MCG base station or an SCG base station, the indication being for determining to transmit the message by one or more of an MCG split SRB and/or the one or more SCG SRBs, where The determination is based at least in part on the received indication.
  • the determining includes detecting whether the configured one or more SRBs are functioning properly, wherein only one or more SRBs for transmitting the message are determined from the working SRBs.
  • the determining further comprises detecting a link quality of the normally operating SRB, wherein the one or more SRBs for transmitting the message are determined based on the detected link quality.
  • the UE 400 after detecting the failure of the wireless link of the MCG base station and before transmitting the message, the UE 400 suspends all MCG data radio bearers DRB and suspends transmission of the MCG split SRB at the MCG.
  • the processor 430 can store instructions executable by the processor 420 such that the user device 400 performs the method 300 described above in connection with FIG.
  • the UE 400 detects a radio link failure between the UE and the primary cell group MCG base station.
  • the UE 400 transmits a message related to the radio link failure of the UE and the MCG base station to the SCG base station through the physical uplink control channel PUCCH or the medium access control MAC control unit CE of the secondary cell group SCG.
  • FIG. 5 is a flow chart showing a method 500 in a base station in accordance with an embodiment of the disclosure. As shown, method 500 includes the following steps.
  • step S510 an indication is sent to the user equipment UE, where the indication is used by the UE to determine to split one or more of the signaling radio bearer SRB and/or one or more secondary cell group SCG SRBs by the primary cell group MCG.
  • a message related to a radio link failure between the UE and the MCG base station is sent.
  • the base station is an SCG base station
  • the method 500 further comprising: receiving the message from the UE; determining, by reading the message, determining a radio link failure of the MCG base station; and transmitting and transmitting to the MCG base station The wireless link fails to be associated with the notification.
  • FIG. 6 shows a block diagram of a base station 600 in accordance with an embodiment of the present disclosure.
  • base station 600 includes a transceiver 610, a processor 620, and a memory 630 that stores instructions executable by the processor 620 such that base station 600 performs the method 500 described above in connection with FIG.
  • the base station 600 sends an indication to the user equipment UE, where the indication is used by the UE to determine to split one or more of the signaling radio bearer SRB and/or one or more secondary cell groups SCG SRB by the primary cell group MCG.
  • a message related to a radio link failure between the UE and the MCG base station is sent.
  • the program running on the device according to the present invention may be a program that causes a computer to implement the functions of the embodiments of the present invention by controlling a central processing unit (CPU).
  • the program or 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 system.
  • a program for realizing the functions of the embodiments of the present invention can be recorded on a computer readable recording medium.
  • the corresponding functions can be realized by causing a computer system to read programs recorded on the recording medium and execute the programs.
  • the so-called "computer system” herein may be a computer system embedded in the device, and may include an operating system or hardware (such as a peripheral device).
  • the "computer readable recording medium” may be a semiconductor recording medium, an optical recording medium, a magnetic recording medium, a recording medium of a short-term dynamic storage program, or any other recording medium readable by a computer.
  • circuitry e.g., monolithic or multi-chip integrated circuits.
  • Circuitry designed to perform the functions described in this specification can include general purpose processors, digital signal processors (DSPs), application specific integrated circuits (ASICs), field programmable gate arrays (FPGAs), or other programmable logic devices, discrete Gate or transistor logic, discrete hardware components, or any combination of the above.
  • DSPs digital signal processors
  • ASICs application specific integrated circuits
  • FPGAs field programmable gate arrays
  • a general purpose processor may be a microprocessor or any existing processor, controller, microcontroller, or state machine.
  • the above circuit may be a digital circuit or an analog circuit.
  • One or more embodiments of the present invention may also be implemented using these new integrated circuit technologies in the context of new integrated circuit technologies that have replaced existing integrated circuits due to advances in semiconductor technology.
  • UE devices Fixed or non-mobile electronic devices installed indoors or outdoors can be used as UE devices or communication devices such as AV devices, kitchen devices, cleaning devices, air conditioners, office equipment, vending machines, and other home appliances.

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Abstract

本公开提供了一种用户设备UE中的方法，所述用户设备配置有一个或多个信令无线承载SRB，包括主小区群MCG分裂SRB和/或一个或多个辅小区群SCG SRB，所述方法包括：检测UE与MCG基站之间的无线链路失败；在所配置的一个或多个SRB中确定用于发送与所述无线链路失败相关的消息的一个或多个SRB；以及通过所确定的一个或多个SRB来发送所述消息。

Description

基站、用户设备和相关方法 技术领域
本公开涉及无线通信技术领域，更具体地，本公开涉及一种用户设备、基站和相关方法。
背景技术
随着移动通信的快速增长和技术的巨大进步，世界将走向一个完全互联互通的网络社会，即任何人或任何东西在任何时间和任何地方都可以获得信息和共享数据。预计到2020年，互联设备的数量将达到500亿部，其中仅有100亿部左右可能是手机和平板电脑，其它的则不是与人对话的机器，而是彼此对话的机器。因此，如何设计系统以更好地支持万物互联是一项需要深入研究的课题。
为此，在2016年3月举行的第三代合作伙伴计划(3GPP)RAN#64次全会上，提出了新5G无线接入技术的研究课题(参见非专利文献：RP-160671 New SID Proposal：Study on New Radio Access Technology)。在该工作项目的描述中，未来新的通信制式的工作频段可扩展至100GHz，同时将至少满足增强的移动宽带业务需求、海量物联网UE的通信需求，以及高可靠性要求的业务需求等，该项目研究工作将于2018年结束。
在该课题的研究中，包含了双连接DC(dual connectivity)场景的应用研究。为了支持更大的传输速率以及可靠的信令传递，在NR DC场景下，可以支持MCG分裂SRB和SCG SRB。其中MCG分裂SRB主要用来保证传输的可靠性，MCG基站产生的控制信息可以通过MCG空口以及SCG空口同时发送给UE，实现了信令的重复传输，提供传输的可靠性；而SCG SRB则用来实现控制的及时性，因为在传统的LTE DC场景下，SCG的测量、重配置等都需要通过MeNB和SeNB之间的接口传给MeNB，并由MeNB发送给UE，从而引入了不可避免的时延。在NR DC场景下，通过SCG SRB，上述的测量、重配置等信息可以直接通过SCG SRB发给UE，保证了链路管理的有效性和实时性。
在现有技术中R2-1700918 RLM and RLF in case of LTE-NR tight interworking指出，当UE检测到MCG无线链路失败时，可以通过MCG分裂SRB通知给MCG基站，从而使得MCG基站做进一步处理；而在R2-1701344 Control plane signalling transport for LTE-NR tight interworking中指出，当UE检测到MCG无线链路失败时，可以通过SCG SRB通知给MCG基站，从而使得MCG基站做进一步处理。
在NR DC的场景中，由于MCG分裂SRB和SCG SRB有其不同的作用，因此基站可以同时给用户配置这两类SRB中的一类或两类。在这种情况下，如果UE检测到MCG发生无线链路失败，UE如何发送携带MCG无线链路失败信息的消息是需要解决的问题。进一步的，在NR配置多连接的场景下，类似的问题也同样需要解决。
发明内容
根据本公开的第一方面，提供了一种用户设备UE中的方法，所述用户设备配置有一个或多个信令无线承载SRB，包括主小区群MCG分裂SRB和/或一个或多个辅小区群SCG SRB，所述方法包括：检测UE与MCG基站之间的无线链路失败；在所配置的一个或多个SRB中确定用于发送与所述无线链路失败相关的消息的一个或多个SRB；以及通过所确定的一个或多个SRB来发送所述消息。
在实施例中，上述方法还包括：从MCG基站或SCG基站接收指示，所述指示用于确定通过MCG分裂SRB和/或所述一个或多个SCG SRB中的一个或多个来发送所述消息，其中，所述确定至少部分基于所接收的指示。
在实施例中，所述确定包括：检测所配置的一个或多个SRB是否正常工作，其中，仅从正常工作的SRB中确定用于发送所述消息的一个或多个SRB。
在实施例中，所述确定还包括：检测正常工作的SRB的链路质量，其中，基于所检测的链路质量来确定用于发送所述消息的一个或多个SRB。
在实施例中，上述方法还包括，在检测到MCG基站的无线链路失 败之后以及发送所述消息之前：暂停所有MCG数据无线承载DRB，并暂停MCG分裂SRB在MCG处的传输。
根据本公开的第二方面，提供了一种用户设备UE中的方法，包括：检测UE与主小区群MCG基站之间的无线链路失败；以及通过辅小区群SCG的物理上行控制信道PUCCH或媒体接入控制MAC控制单元CE，向SCG基站发送与所述UE与MCG基站的无线链路失败相关的消息。
根据本公开的第三方面，提供了一种用户设备UE，包括收发机、处理器和存储器，所述处理器存储所述处理器可执行的指令，使得所述用户设备执行根据上述第一或第二方面的方法。
根据本公开的第四方面，提供了一种基站中的方法，包括：向用户设备UE发送指示，所述指示用于所述UE确定通过主小区群MCG分裂信令无线承载SRB和/或一个或多个辅小区群SCG SRB中的一个或多个来发送与所述UE与MCG基站之间的无线链路失败相关的消息。
在实施例中，所述基站是SCG基站，上述方法还包括：从所述UE接收所述消息；通过读取所述消息，确定MCG基站的无线链路失败；以及向MCG基站发送与所述无线链路失败相关的通知。
根据本公开的第五方面，提供了一种基站，包括收发机、处理器和存储器，所述处理器存储所述处理器可执行的指令，使得所述基站执行根据上述第四方面的方法。
附图说明
通过下文结合附图的详细描述，本公开的上述和其它特征将会变得更加明显，其中：
图1示出了MCG/SCG协议架构图。
图2示出了根据本公开实施例的用户设备中的方法的流程图。
图3示出了根据本公开另一实施例的用户设备中的方法的流程图。
图4示出了根据本公开实施例的用户设备的框图。
图5示出了根据本公开实施例的基站中的方法的流程图。
图6示出了根据本公开实施例的基站的框图。
具体实施方式
下面结合附图和具体实施方式对本发明进行详细阐述。应当注意，本发明不应局限于下文所述的具体实施方式。另外，为了简便起见，省略了对与本发明没有直接关联的公知技术的详细描述，以防止对本发明的理解造成混淆。
下文以NR移动通信系统及其后续的演进版本作为示例应用环境，以支持NR DC的基站和UE设备为例，具体描述了根据本发明的多个实施方式。然而，需要指出的是，本发明不限于以下实施方式，而是可适用于更多其它的无线通信系统，例如eLTE通信系统，而且可以适用于其他基站和UE设备，例如支持eLTE的基站和UE设备。
NR DC场景包括但不限于下述组合：
MCG相关基站为NR基站，SCG相关基站为NR基站
MCG相关基站为NR基站，SCG相关基站为LTE或者eLTE基站
MCG相关基站为LTE或者eLTE基站，SCG相关基站为NR基站。
在具体描述之前，先对本发明中提到的若干术语做如下说明。除非另有指出，本发明中涉及的术语都具有下文的含义。
UE        User Equipment用户设备
MCG       Master Cell Group主小区群
SCG       Secondary Cell Group辅小区群
DC        Dual Connectivity双连接
SRB       Signal Radio Bearer无线信令承载
Split SRB Split Signal Radio Bearer分裂的无线信令承载
RLF       Radio Link Failure无线链路失败
NR        New Radio新一代无线技术
LTE       Long Term Evolution长期演进技术
Elte      Enhaced Long Term Evolution增强的长期演进技术
RRC       Radio Resource Control无线资源控制
PDCP      Packet Data Convergence Protocol分组数据汇聚协议(层)
RLC       Radio Link Control无线链路控制(层)
MAC     Medium Access Control媒体接入控制(层)
PHY     physical layer物理层
MeNB    Master eNB主基站(MCG基站)
SeNB    Secondary eNB辅基站(SCG基站)
MAC CE  Medium Access Control Control Element
        媒体接入控制层控制元素
PUCCH   Physical Uplink Control Channel物理层上行控制信道
此外，下文中描述的SRB是指无线信令承载，用来传输基站和UE之间的信令，特别是控制信令，也可以用来传输非接入层的信令消息。
MCG分裂Bearer是指MCG基站和UE之间建立的无线承载，该承载同时使用了MCG和SCG的资源。其协议架构实现方式之一可以如图1所示，其中，用于传输控制信令的MCG分裂Bearer被称为MCG分裂SRB.
SCG Bearer是指该SCG基站和UE建立的无线承载，仅使用SCG的资源，其协议架构实现方式之一可以如图1所示，其中，用于传输控制信令的SCG bearer被称为SCG SRB，
图2示出了根据本公开实施例的用户设备UE中的方法200的流程图。所述用户设备配置有一个或多个信令无线承载SRB，包括主小区群MCG分裂SRB和/或一个或多个辅小区群SCG SRB。方法200包括以下步骤。
在步骤S210，检测UE与MCG基站之间的无线链路失败。
导致UE与MCG基站之间无线链路失败RLF的原因有多种，包括但是不限于以下情况：连续的MCG物理层无线链路检测失步；MCG MAC的随机接入失败；MCG SRB/DRB或者MCG分裂SRB/DRB在MCG中的RLC层指示达到/超过最大重传次数等等。当终端检测到上述情况中的一种或者多种，即可认为检测到UE与MCG基站之间无线链路发生失败，即MCG RLF。
在步骤S220，在所配置的一个或多个SRB中确定用于发送与所述无线链路失败相关的消息的一个或多个SRB。
在步骤S230，通过所确定的一个或多个SRB来发送所述消息。
在一个示例中，UE可以总是通过MCG分裂SRB发送携带MCG RLF信息的消息。或者，UE可以总是通过SCG SRB发送携带MCG RLF信息的消息。
在另一示例中，方法200还包括：从MCG基站或SCG基站接收指示，所述指示用于直接或间接确定通过MCG分裂SRB和/或所述一个或多个SCG SRB中的一个或多个来发送所述消息。在步骤S220中，所述确定至少部分基于所接收的指示。
例如，UE在发送携带MCG RLF信息的消息之前，收到基站发来的信息，其中携带了指示，指示UE需要在哪类SRB上发送(或者优先发送)携带MCG RLF信息的消息。具体的可以是用1bit指示，0表示MCG分裂SRB，1表示SCG SRB，或者反之。
在一个示例中，在步骤S220中，所述确定包括：检测所配置的一个或多个SRB是否正常工作，其中，仅从正常工作的SRB中确定用于发送所述消息的一个或多个SRB。
在一个示例中，在步骤S220中，所述确定还包括：检测正常工作的SRB的链路质量，其中，基于所检测的链路质量来确定用于发送所述消息的一个或多个SRB。
例如，UE在检测到MCG RLF之后(或者同时)，UE可以进行如下之一或多的操作方式。
方式一：UE判断MCG分裂SRB是否正常工作，可以包括但不限于以下之一方面或者多方面：判断UE是否建立了MCG分裂SRB，或者基站是否给UE配置了MCG分裂SRB，又或者MCG分裂SRB是否处于非暂停的状态(即工作状态，no suspend)。
如果判断MCG分裂SRB正常工作，所述正常工作的依据可以包括但不限于以下之一方面或者多方面：例如，UE建立了MCG分裂SRB，或者是基站给UE配置了MCG分裂SRB，又或者是MCG分裂SRB处于非暂停的状态(即工作态，no suspend)，则UE在MCG分裂SRB上发送携带MCG RLF信息的消息。可选的，UE发送携带MCG RLF信息 的消息的流程结束。
如果判断MCG分裂SRB非正常工作，所述非正常工作的依据可以包括但不限于以下之一方面或者多方面：例如UE没有建立MCG分裂SRB，或者是基站没有给UE配置MCG分裂SRB，又或者是MCG分裂SRB在SCG侧的传输或者是SCG bearer处于暂停的状态(即suspend)，则UE可选的操作包括但不限于下述方面：
方面一，继续判断SCG SRB是否正常工作。当SCG SRB正常工作，则UE在SCG SRB上传输带MCG RLF信息的消息；当SCG SRB非正常工作，则UE取消发送携带MCG RLF信息的消息或者结束发送携带MCG RLF信息的消息的流程，以及可选的，向基站发起重新建立连接的请求或者触发重新建立连接的流程。
或者
方面二，取消发送携带MCG RLF信息的消息或者结束发送携带MCG RLF信息的消息的流程，以及可选的，向基站发起重新建立连接的请求或者触发重新建立连接的流程。
方式二：UE判断SCG SRB是否正常工作，可以包括但不限于以下之一方面或者多方面：判断UE是否建立了SCG SRB，或者基站是否给UE配置了SCG SRB，又或者SCG SRB是否处于非暂停的状态(即工作态，no suspend)。
如果判断SCG SRB正常工作，所述正常工作的依据可以包括但不限于以下之一方面或者多方面：例如UE建立了SCG SRB，或者是基站给UE配置了SCG SRB，又或者是SCG SRB处于非暂停的状态(即工作态，no suspend)，则UE确定在SCG SRB上发送带MCG RLF信息的消息。
如果判断SCG SRB非正常工作，所述正常工作的依据可以包括但不限于以下之一方面或者多方面：例如UE没有建立SCG SRB，或者是基站没有给UE配置SCG SRB，又或者是SCG SRB或者是SCG bearer处于暂停的状态(即suspend)，则UE可选的操作包括但不限于下述方面：
方面一，继续判断MCG分裂SRB是否正常工作：当MCG分裂SRB正常工作，则UE在MCG分裂SRB上传输带MCG RLF信息的消息；当MCG分裂SRB非正常工作，则UE取消发送携带MCG RLF信息的消息或者结束发送携带MCG RLF信息的消息的流程，以及可选的，向 基站发起重新建立连接的请求或者触发重新建立连接的流程。
或者
方面二，取消发送携带MCG RLF信息的消息或者结束发送携带MCG RLF信息的消息的流程，以及可选的，向基站发起重新建立连接的请求或者触发重新建立连接的流程。
方式三：UE判断SCG SRB和MCG分裂SRB是否正常工作。具体判断过程如前所述。
当UE判断MCG分裂SRB和SCG SRB中只有一类SRB是正常工作的，则UE只在正常工作的SRB上发送携带MCG RLF信息的消息；
当UE判断MCG分裂SRB和SCG SRB都正常工作(非暂停，no suspend)时，UE可以
-在基站指示的SRB类型上发送携带MCG RLF信息的消息；
-或者在MCG分裂SRB和SCG SRB中随机选择一个SRB发送携带MCG RLF信息的消息；
-又或者在MCG分裂SRB和SCG SRB上都发送携带MCG RLF信息的消息；
-又或者当MCG分裂SRB和SCG SRB分别属于不同的SCG时，UE可以比较这两个SCG的无线链路质量，UE可以选择对应无线链路质量好的那个SCG所拥有的SRB进行传输，例如，MCG分裂SRB所属的那个SCG的无线链路质量比SCG SRB所属的那个SCG的无线链路质量好，则选择MCG分裂SRB进行传输，反之，则选择SCG SRB进行传输。
当UE判断SCG SRB和MCG分裂SRB都非正常工作，则UE取消发送携带MCG RLF信息的消息或者结束发送携带MCG RLF信息的消息的流程，以及可选的，向基站发起重新建立连接的请求或者触发重新建立连接的流程。
方式四：UE根据基站指示的SRB类型进行判断，具体判断过程如前所述。例如，基站指示在SCG SRB上发送(或者优先发送)携带MCG RLF信息的消息，则UE首先判断SCG SRB是否正常工作，接下来的处理流程和方式二相同。
本方式中还可以例如基站指示在MCG分裂SRB上发送(或者优先 发送)携带MCG RLF信息的消息，UE可首先判断MCG分裂SRB是否正常工作，接下来的处理流程和方式一相同。
UE可以被配置多个SCG，进而被配置多个SCG SRB，每个SCG SRB由不同的SCG基站与UE之间的通信。
在这种情况下，基站除了指示在哪一类SRB上传输外，还可以指示在哪些SCG的SCG SRB上传递携带MCG RLF信息的消息。具体的实现包括但不限于以下方式：
基站给UE配置了SCG1和SCG2，以及SCG1 SRB、SCG2 SRB和MCG分裂SRB。
方式一：基站指示UE可以通过(或者优先通过)MCG分裂SRB发送携带MCG RLF信息的消息。
当UE检测到MCG RLF之后，UE判断MCG分裂SRB是否正常工作(具体判断过程如前所述)，如果正常工作，则UE在MCG分裂SRB上发送消息。
如果非正常工作(具体判断过程如前所述)，则UE进而判断SCG SRB是否正常工作。
方式二：基站指示UE可以通过(或者优先通过)SCG SRB发送携带MCG RLF信息的消息。
当UE检测到MCG RLF之后，UE判断SCG1 SRB以及SCG2 SRB是否正常工作(具体判断过程如前所述)，
如果只有一个工作正常，则在工作正常的SCG SRB上发送消息；
如果两个都工作正常，则
-UE随机选择一个SCG SRB发送，
-或者UE比较两个SCG的链路质量，选择无线链路质量好的那个SCG的SCG SRB进行发送，
-或者在两个SCG SRB上都发送。
方式三：基站指示UE可以通过(或者优先通过)SCG SRB发送携带MCG RLF信息的消息，以及基站还指示了可以通过(或者优先通过)SCG1 SRB发送携带MCG RLF信息的消息。
当UE检测到MCG RLF之后，UE判断SCG1 SRB是否正常工作， (具体判断过程如前所述))，如果正常工作，则UE在SCG1 SRB上发送消息。
如果SCG1 SRB非正常工作，则UE进而判断SCG2 SRB是否正常工作，如果正常工作，则UE在SCG2 SRB上发送消息
如果SCG2 SRB非正常工作，则UE进而判断MCG分裂SRB是否正常工作，如果正常工作，则UE在MCG分裂SRB上发送消息。
方式四：基站指示UE可以通过MCG分裂SRB和SCG SRB发送携带MCG RLF信息的消息，或者基站不进行任何指示：
当UE检测到MCG RLF之后，UE判断MCG分裂SRB，SCG1 SRB，SCG2 SRB是否工作正常(具体判断过程如前所述)，
如果只有一个工作正常，则在工作正常的SRB上发送消息；
如果至少有两个都工作正常，则
-UE随机选择一个SRB发送，
-或者UE比较SCG的链路质量，选择无线链路质量最好的那个SCG的SRB进行发送，
-或者在工作正常的SRB上都发送。
在一个示例中，方法200还包括：在检测到MCG基站的无线链路失败之后以及发送所述消息之前：暂停所有MCG数据无线承载DRB，并暂停MCG分裂SRB在MCG处的传输。
图3示出了根据本公开另一实施例的用户设备中的方法300的流程图。方法300包括以下步骤。
在步骤S310，检测UE与主小区群MCG基站之间的无线链路失败。
在步骤S320，通过辅小区群SCG的物理上行控制信道PUCCH或媒体接入控制MAC控制单元CE，向SCG基站发送与所述UE与MCG基站的无线链路失败相关的消息。
具体地，UE检测到MCG发生RLF，UE检测/判断是否有配置/建立SCG，如果有配置/建立SCG，则UE的RRC层通知SCG的MAC层，由MAC层生成MAC CE指示MCG发生了RLF，以及可选的，MAC 层指示/通知PHY层，通过PUCCH发送信息指示MCG RLF。
与上述方法200或方法300相对应，本公开提供了一种用户设备UE。图4示出了根据本公开实施例的UE 400的框图。如图所示，UE 400包括：收发机410、处理器420和存储器430，所述处理器430存储所述处理器420可执行的指令，使得所述用户设备400执行以上结合图2描述的方法200。
具体地，UE 400检测UE与MCG基站之间的无线链路失败。
进一步，UE 400在所配置的一个或多个SRB中确定用于发送与所述无线链路失败相关的消息的一个或多个SRB。
进一步，UE 400通过所确定的一个或多个SRB来发送所述消息。
在一个示例中，UE 400从MCG基站或SCG基站接收指示，所述指示用于确定通过MCG分裂SRB和/或所述一个或多个SCG SRB中的一个或多个来发送所述消息，其中，所述确定至少部分基于所接收的指示。
在一个示例中，所述确定包括：检测所配置的一个或多个SRB是否正常工作，其中，仅从正常工作的SRB中确定用于发送所述消息的一个或多个SRB。
在一个示例中，所述确定还包括：检测正常工作的SRB的链路质量，其中，基于所检测的链路质量来确定用于发送所述消息的一个或多个SRB。
在一个示例中，UE 400在检测到MCG基站的无线链路失败之后以及发送所述消息之前：暂停所有MCG数据无线承载DRB，并暂停MCG分裂SRB在MCG处的传输。
备选地，所述处理器430可以存储所述处理器420可执行的指令，使得所述用户设备400执行以上结合图3描述的方法300。
具体地，UE 400检测UE与主小区群MCG基站之间的无线链路失败。
进一步，UE 400通过辅小区群SCG的物理上行控制信道PUCCH或媒体接入控制MAC控制单元CE，向SCG基站发送与所述UE与MCG 基站的无线链路失败相关的消息。
以上关于方法200或300描述的各个方面、特征和示例也适用于UE400。
本公开还提供了一种基站中的方法。图5是示出了根据本公开实施例的基站中的方法500的流程图。如图所示，方法500包括以下步骤。
在步骤S510，向用户设备UE发送指示，所述指示用于所述UE确定通过主小区群MCG分裂信令无线承载SRB和/或一个或多个辅小区群SCG SRB中的一个或多个来发送与所述UE与MCG基站之间的无线链路失败相关的消息。
在一个示例中，所述基站是SCG基站，所述方法500还包括：从所述UE接收所述消息；通过读取所述消息，确定MCG基站的无线链路失败；以及向MCG基站发送与所述无线链路失败相关的通知。
与上述方法500相对应，本公开提供了一种基站。图6示出了根据本公开实施例的基站600的框图。如图所示，基站600包括：收发机610、处理器620和存储器630，所述处理器630存储所述处理器620可执行的指令，使得基站600执行以上结合图5描述的方法500。
具体地，基站600向用户设备UE发送指示，所述指示用于所述UE确定通过主小区群MCG分裂信令无线承载SRB和/或一个或多个辅小区群SCG SRB中的一个或多个来发送与所述UE与MCG基站之间的无线链路失败相关的消息。
以上关于方法500描述的各个方面、特征和示例也适用于基站600。
运行在根据本发明的设备上的程序可以是通过控制中央处理单元(CPU)来使计算机实现本发明的实施例功能的程序。该程序或由该程序处理的信息可以临时存储在易失性存储器(如随机存取存储器RAM)、硬盘驱动器(HDD)、非易失性存储器(如闪速存储器)、或其他存储器系统中。
用于实现本发明各实施例功能的程序可以记录在计算机可读记录介质上。可以通过使计算机系统读取记录在所述记录介质上的程序并执行这些程序来实现相应的功能。此处的所谓“计算机系统”可以是嵌入在该设备中的计算机系统，可以包括操作系统或硬件(如外围设备)。“计算机可读记录介质”可以是半导体记录介质、光学记录介质、磁性记录介质、短时动态存储程序的记录介质、或计算机可读的任何其他记录介质。
用在上述实施例中的设备的各种特征或功能模块可以通过电路(例如，单片或多片集成电路)来实现或执行。设计用于执行本说明书所描述的功能的电路可以包括通用处理器、数字信号处理器(DSP)、专用集成电路(ASIC)、现场可编程门阵列(FPGA)、或其他可编程逻辑器件、分立的门或晶体管逻辑、分立的硬件组件、或上述器件的任意组合。通用处理器可以是微处理器，也可以是任何现有的处理器、控制器、微控制器、或状态机。上述电路可以是数字电路，也可以是模拟电路。因半导体技术的进步而出现了替代现有集成电路的新的集成电路技术的情况下，本发明的一个或多个实施例也可以使用这些新的集成电路技术来实现。
此外，本发明并不局限于上述实施例。尽管已经描述了所述实施例的各种示例，但本发明并不局限于此。安装在室内或室外的固定或非移动电子设备可以用作UE设备或通信设备，如AV设备、厨房设备、清洁设备、空调、办公设备、自动贩售机、以及其他家用电器等。
如上，已经参考附图对本发明的实施例进行了详细描述。但是，具体的结构并不局限于上述实施例，本发明也包括不偏离本发明主旨的任何设计改动。另外，可以在权利要求的范围内对本发明进行多种改动，通过适当地组合不同实施例所公开的技术手段所得到的实施例也包含在本发明的技术范围内。此外，上述实施例中所描述的具有相同效果的组件可以相互替代。

Claims (10)

  1. 一种用户设备UE中的方法，所述用户设备配置有一个或多个信令无线承载SRB，包括主小区群MCG分裂SRB和/或一个或多个辅小区群SCG SRB，所述方法包括：
    检测UE与MCG基站之间的无线链路失败；
    在所配置的一个或多个SRB中确定用于发送与所述无线链路失败相关的消息的一个或多个SRB；以及
    通过所确定的一个或多个SRB来发送所述消息。
  2. 根据权利要求1所述的方法，还包括：
    从MCG基站或SCG基站接收指示，所述指示用于确定通过MCG分裂SRB和/或所述一个或多个SCG SRB中的一个或多个来发送所述消息，
    其中，所述确定至少部分基于所接收的指示。
  3. 根据权利要求1或2所述的方法，所述确定包括：
    检测所配置的一个或多个SRB是否正常工作，
    其中，仅从正常工作的SRB中确定用于发送所述消息的一个或多个SRB。
  4. 根据权利要求3所述的方法，所述确定还包括：
    检测正常工作的SRB的链路质量，
    其中，基于所检测的链路质量来确定用于发送所述消息的一个或多个SRB。
  5. 根据权利要求1所述的方法，还包括，在检测到MCG基站的无线链路失败之后以及发送所述消息之前：
    暂停所有MCG数据无线承载DRB，并暂停MCG分裂SRB在MCG处的传输。
  6. 一种用户设备UE中的方法，包括：
    检测UE与主小区群MCG基站之间的无线链路失败；以及
    通过辅小区群SCG的物理上行控制信道PUCCH或媒体接入控制MAC控制单元CE，向SCG基站发送与所述UE与MCG基站的无线链路失败相关的消息。
  7. 一种用户设备UE，包括收发机、处理器和存储器，所述处理器存储所述处理器可执行的指令，使得所述用户设备执行根据权利要求1-6中任一项所述的方法。
  8. 一种基站中的方法，包括：
    向用户设备UE发送指示，所述指示用于所述UE确定通过主小区群MCG分裂信令无线承载SRB和/或一个或多个辅小区群SCG SRB中的一个或多个来发送与所述UE与MCG基站之间的无线链路失败相关的消息。
  9. 根据权利要求8所述的方法，其中，所述基站是SCG基站，所述方法还包括：
    从所述UE接收所述消息；
    通过读取所述消息，确定MCG基站的无线链路失败；以及
    向MCG基站发送与所述无线链路失败相关的通知。
  10. 一种基站，包括收发机、处理器和存储器，所述处理器存储所述处理器可执行的指令，使得所述基站执行根据权利要求8-9中任一项所述的方法。
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