WO2017118399A1 - 无线资源控制流程监测方法和设备 - Google Patents

无线资源控制流程监测方法和设备 Download PDF

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Publication number
WO2017118399A1
WO2017118399A1 PCT/CN2017/070274 CN2017070274W WO2017118399A1 WO 2017118399 A1 WO2017118399 A1 WO 2017118399A1 CN 2017070274 W CN2017070274 W CN 2017070274W WO 2017118399 A1 WO2017118399 A1 WO 2017118399A1
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Prior art keywords
rrc connection
connection recovery
rrc
message
recovery procedure
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PCT/CN2017/070274
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English (en)
French (fr)
Inventor
常宁娟
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夏普株式会社
常宁娟
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Application filed by 夏普株式会社, 常宁娟 filed Critical 夏普株式会社
Priority to EP17735837.1A priority Critical patent/EP3402284B1/en
Priority to US16/067,653 priority patent/US10798769B2/en
Publication of WO2017118399A1 publication Critical patent/WO2017118399A1/zh

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    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W76/00—Connection management
    • H04W76/30—Connection release
    • H04W76/38—Connection release triggered by timers
    • 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
    • H04W72/00—Local resource management
    • H04W72/50—Allocation or scheduling criteria for wireless resources
    • H04W72/52—Allocation or scheduling criteria for wireless resources based on load
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W72/00—Local resource management
    • H04W72/12—Wireless traffic scheduling
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W72/00—Local resource management
    • H04W72/20—Control channels or signalling for resource management
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W76/00—Connection management
    • H04W76/10—Connection setup
    • H04W76/18—Management of setup rejection or failure
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W84/00—Network topologies
    • H04W84/02—Hierarchically pre-organised networks, e.g. paging networks, cellular networks, WLAN [Wireless Local Area Network] or WLL [Wireless Local Loop]
    • H04W84/04—Large scale networks; Deep hierarchical networks
    • H04W84/042—Public Land Mobile systems, e.g. cellular systems

Definitions

  • the present invention relates to the field of wireless communication technologies. More specifically, the present invention relates to an information configuration method for communication between devices and a base station and a user equipment.
  • NB-IoT NarrowBand-Internet of Things
  • 3GPP has introduced a solution called user plane solution, which is briefly described as follows:
  • Radio Resource control RRC
  • DRB Data Radio Bearer
  • the UE and the evolved NodeB (eNB) release the RRC connection after the data transmission is completed, delete the UE context and enter the RRC idle state;
  • the UE and the eNB suspend the RRC connection and save the UE context.
  • the eNB informs the UE to suspend the RRC connection and save the UE context through RRC signaling.
  • the UE when the UE has uplink data transmission or downlink data reception, the UE initiates an RRC connection recovery procedure to the eNB. Because the UE and the eNB save the UE context, the RRC connection can be restored through the process. Data transmission without the need to establish DRB through the RRC reconfiguration process, and without security Establish a process for the establishment of air interface security. It can be seen that in this way, the signaling overhead of the air interface is saved.
  • the RRC connection suspension/recovery process is introduced to reduce the control signaling overhead during data transmission.
  • the UE triggers the RRC connection recovery process, how to monitor the RRC connection recovery process is called solved problem.
  • the user plane solution introduces a new RRC connection recovery procedure. After the process is triggered, the UE side needs to monitor whether the process is successfully completed, and the RRC protocol in the existing mechanism cannot cover the problem. Therefore, this is the problem that the present invention is concerned with and which is to be solved.
  • the method of the present invention is not limited to the NB-IoT system of Release 13 described in the background art, and is also applicable to other non-NB-IoT devices and systems, such as Machine Type Communication (MTC) scenarios.
  • MTC Machine Type Communication
  • an RRC procedure monitoring method performed at a user equipment UE, comprising: initiating an RRC connection recovery when the UE or UE radio resource control RRC layer triggers an RRC connection recovery procedure Process monitoring timer.
  • the method further includes: if the RRC connection recovery procedure monitoring timer is running, the UE or the UE RRC layer receives an RRC connection recovery message or an RRC connection recovery reject message or an RRC connection setup message from the evolved node eNB, or If the upper layer aborts the RRC connection recovery process, or the cell reselection occurs, the UE or the UE RRC layer stops the UE RRC connection recovery process monitoring timer, and ends the RRC connection recovery process, where the RRC connection recovery message includes Configuration information for restoring an RRC connection when the UE context is stored on the eNB and the UE.
  • the method further includes: if the RRC connection recovery procedure monitoring timer expires, the UE or the UE RRC layer determines that the RRC connection recovery process fails.
  • the method further includes receiving, from the eNB, a configuration message including a value of the timer.
  • the configuration message is a system information message and/or a UE-specific RRC message and/or a medium access control MAC layer signaling message that are sent in a broadcast manner.
  • a user equipment UE for monitoring an RRC connection recovery procedure.
  • the UE includes: an RRC connection recovery procedure management unit configured to trigger an RRC connection recovery procedure; and a timer management unit configured to initiate an RRC connection recovery procedure monitoring timer when the RRC connection recovery procedure is triggered, where the RRC connection
  • the recovery procedure management unit is further configured to: if the RRC connection recovery procedure monitoring timer is running, the UE or the UE RRC layer receives an RRC connection recovery message or an RRC connection recovery reject message or an RRC connection establishment from the evolved node eNB The message, or the upper layer suspends the RRC connection recovery process, or the cell reselection occurs, ending the RRC connection recovery process, where the RRC connection recovery message includes configuration information for restoring the RRC connection when the UE context is stored on the eNB and the UE.
  • the timer management unit is further configured to: if the RRC connection recovery procedure monitoring timer is running, the UE or UE RRC layer receives an RRC connection recovery message or an RRC connection recovery reject message or an RRC connection from the evolved node eNB Establish a message, or the upper layer terminates the RRC connection recovery process, or the cell reselection occurs, stopping the UE RRC connection Connect to the recovery process monitoring timer.
  • the UE further includes: a receiving unit, configured to receive, from the eNB, a configuration message including a value of the timer.
  • FIG. 1 is a schematic diagram of an RRC connection suspension
  • FIG. 2 is a schematic diagram of an RRC connection recovery process
  • FIG. 3 is a flow diagram of an RRC process monitoring method performed at a UE in accordance with the present invention.
  • FIG. 4 is a flow chart showing a configuration of a base station side according to Embodiment 1 of the present invention.
  • FIG. 5 is a schematic flowchart of a UE side configuration according to Embodiment 1 of the present invention.
  • FIG. 6 is a schematic flowchart of information exchange between a base station and an UE according to Embodiment 1 of the present invention.
  • FIG. 7 is a schematic flowchart of UE side processing according to Embodiment 2 of the present invention.
  • FIG. 8 is a schematic flowchart of UE side processing according to Embodiment 3 of the present invention.
  • FIG. 9 is a schematic flowchart of UE side processing according to Embodiment 4 of the present invention.
  • 10-12 are schematic flowcharts of UE side processing according to Embodiment 5 of the present invention.
  • FIG. 13 is a schematic diagram of a configuration of a UE according to Embodiment 6 of the present invention.
  • LTE mobile communication system and its subsequent evolved versions are taken as an example application environment, and NB-IoT is used as an implementation technical scenario, and various embodiments according to the present invention are specifically described.
  • NB-IoT is used as an implementation technical scenario, and various embodiments according to the present invention are specifically described.
  • the present invention is not limited to the following embodiments, but can be applied to more other wireless communication systems, such as future 5G cellular communication systems.
  • FIG. 3 is a flow chart showing an RRC process monitoring method 300 performed at a UE in accordance with the present invention.
  • the method includes the step 301, wherein when the UE or the UE radio resource control RRC layer triggers the RRC connection recovery process, the RRC connection recovery process monitoring timer is started.
  • the method further includes a step 302, wherein the UE or the UE RRC layer receives an RRC connection recovery message or an RRC connection recovery reject message or an RRC connection from the evolved node eNB if the RRC connection recovery procedure monitoring timer is running.
  • the UE or the UE RRC layer stops the UE RRC connection recovery process monitoring timer, and ends the RRC connection recovery process, where the RRC connection
  • the recovery message includes configuration information for restoring the RRC connection when the UE context is stored on the eNB and the UE.
  • the RRC process can be effectively monitored.
  • Embodiment 4 is a flowchart of a configuration of a base station side in Embodiment 1 of the present invention.
  • Step 401 The eNB sends a configuration message, where the RRC connection recovery process monitoring timer configuration information is used, and the timer is used to monitor the RRC connection recovery process.
  • the RRC connection recovery procedure is for RRC connection recovery when the UE context is stored on the eNB.
  • the configuration information includes a value of the timer.
  • the timer is named as T308, and the configuration information includes the value of T308 being 200 ms.
  • the configuration message sent by the eNB may be an RRC message, and one mode is a system information message that is sent in a broadcast manner, such as a second system information block (SIB2), and another mode is a UE-specific RRC message, such as RRC.
  • SIB2 second system information block
  • RRC UE-specific RRC message
  • MAC medium access control
  • the eNB in this embodiment may be an eNB adopting an NB-IoT access technology, or may be Other types of eNBs.
  • FIG. 5 is a flowchart of configuring a UE side according to Embodiment 1 of the present invention.
  • Step 501 The UE receives the configuration message, where the RRC connection recovery process monitoring timer configuration information is used, where the timer is used to monitor the RRC connection recovery process.
  • the RRC connection recovery procedure is used for RRC connection recovery when the UE context is stored on the UE.
  • the configuration information includes a value of the timer.
  • the timer is named as T308, and the configuration information includes the value of T308 being 200 ms.
  • the configuration message received by the UE may be an RRC message, one mode is a system information message that is sent in a broadcast manner, such as SIB2, and the other is a UE-specific RRC message, such as an RRC connection reconfiguration message, an RRC connection suspension message, or the like; It can also be MAC signaling, such as random access response.
  • RRC message one mode is a system information message that is sent in a broadcast manner, such as SIB2
  • a UE-specific RRC message such as an RRC connection reconfiguration message, an RRC connection suspension message, or the like
  • It can also be MAC signaling, such as random access response.
  • the UE in this embodiment may be an NB-IoT UE, or may be another type of UE other than NB-IoT.
  • Step 502 The UE applies the received RRC connection recovery process to monitor the timer configuration information, and performs monitoring of the RRC connection recovery process according to the timer configuration information.
  • the specific implementation manner in which the UE monitors the RRC connection recovery procedure according to the timer is given in the embodiments 2 to 5, but is not limited thereto.
  • FIG. 6 is a flowchart of information interaction between a base station and a UE according to Embodiment 1 of the present invention.
  • Step 601 The eNB sends a configuration message to the UE.
  • the RRC connection recovery process monitoring timer configuration information is used to monitor the RRC connection recovery process.
  • the UE receives and applies the received RRC connection recovery procedure monitoring timer configuration information, and performs monitoring of the RRC connection recovery procedure according to the timer configuration information.
  • the RRC connection recovery procedure is used for RRC connection recovery when the UE context is stored on the eNB and the UE.
  • the configuration information includes a value of the timer.
  • the timer is named as T308, and the configuration information includes the value of T308 being 200 ms.
  • the configuration message may be an RRC message, one mode is a system information message that is sent in a broadcast manner, such as SIB2, and the other is a UE-specific RRC message, such as an RRC connection reconfiguration message, an RRC connection suspension message, or the like; MAC signaling, such as random access response.
  • RRC message one mode is a system information message that is sent in a broadcast manner, such as SIB2
  • UE-specific RRC message such as an RRC connection reconfiguration message, an RRC connection suspension message, or the like
  • MAC signaling such as random access response.
  • the UE monitors the specific implementation of the RRC connection recovery process according to the timer.
  • the modes are given in the examples 2 to 5, but are not limited thereto.
  • the UE in this embodiment may be an NB-IoT UE, or may be another type of UE other than NB-IoT.
  • the UE after successfully receiving the configuration message, the UE returns a response message to the eNB. For example, if the configuration message is an RRC connection reconfiguration message, the UE returns an RRC connection reconfiguration complete message as a response.
  • FIG. 7 is a flowchart of processing on the UE side in Embodiment 2 of the present invention.
  • the embodiment provides a method for the UE to perform RRC connection recovery process monitoring according to the RRC connection recovery process monitoring timer configuration information.
  • Step 701 The UE or the UE RRC layer triggers an RRC connection recovery procedure.
  • the RRC connection recovery procedure is used for RRC connection recovery when the UE context is stored on the UE.
  • Step 702 The UE or the UE RRC layer starts an RRC connection recovery procedure monitoring timer. This timer is used to monitor the RRC connection recovery procedure.
  • the UE in this embodiment may be an NB-IoT UE, or may be another type of UE other than NB-IoT.
  • FIG. 8 is a flowchart of processing on the UE side in Embodiment 3 of the present invention.
  • the embodiment provides a method for the UE to perform RRC connection recovery process monitoring according to the RRC connection recovery process monitoring timer configuration information.
  • Step 801 The UE or the UE RRC layer receives an RRC connection recovery message or an RRC connection setup reject message or an RRC connection recovery reject message; or the upper layer suspends the RRC connection recovery procedure; or the cell reselection occurs.
  • the RRC Connection Recovery message is sent by the eNB, and includes configuration information for restoring the RRC connection when the UE context is stored on the eNB and the UE.
  • the RRC connection recovery reject message is sent by the eNB to reject the RRC connection recovery request of the UE.
  • Step 802 The UE or the UE RRC layer stops the RRC connection recovery procedure monitoring timer. This timer is used to monitor the RRC connection recovery procedure.
  • step 801 is to receive an RRC connection recovery message for the UE or the UE RRC layer, or The RRC connection setup message
  • step 802 further includes returning a response message and ending the RRC connection recovery procedure.
  • the step 802 further includes: the UE or the UE RRC layer considers that the RRC connection recovery process fails, and reports the upper layer.
  • the step 802 further includes the UE or the UE RRC layer releasing the UE context.
  • the UE in this embodiment may be an NB-IoT UE, or may be another type of UE other than NB-IoT.
  • FIG. 9 is a flowchart of processing on the UE side according to an embodiment of the present invention.
  • the embodiment provides a method for the UE to perform RRC connection recovery process monitoring according to the RRC connection recovery process monitoring timer configuration information.
  • Step 901 The RRC connection recovery procedure timer expires. This timer is used to monitor the RRC connection recovery procedure.
  • Step 902 The UE performs the following actions:
  • Behavior 1 The UE or the UE RRC layer considers that the current RRC connection recovery procedure has failed.
  • Behavior 2 The UE RRC layer notifies the upper layer that the RRC connection recovery procedure has failed.
  • Behavior 3 The UE or UE RRC layer releases the saved UE context.
  • Behavior 4 The UE or UE RRC layer or the UE Non-Access Stratum layer triggers an RRC connection establishment procedure.
  • Behavior 5 Reset the MAC layer.
  • the behaviors 1 to 5 are optional, that is, the UE can perform one or more of the behaviors 1 to 5.
  • a typical behavior is that the UE performs the behavior 1 to 2, that is, the UE or the UE RRC layer considers that the current RRC connection recovery procedure fails and informs the upper layer.
  • the UE in this embodiment may be an NB-IoT UE, or may be another type of UE other than NB-IoT.
  • FIG. 10 is a flowchart of processing on the UE side according to an embodiment of the present invention.
  • the embodiment provides a method for the UE to perform RRC connection recovery process monitoring according to the RRC connection recovery process monitoring timer configuration information.
  • Step 1001 The UE or the UE RRC layer triggers an RRC connection recovery procedure.
  • the RRC connection recovery procedure is used for RRC connection recovery when the UE context is stored on the UE.
  • Step 1002 The UE or the UE RRC layer starts an RRC connection recovery procedure monitoring timer.
  • This timer is used to monitor the RRC connection recovery procedure.
  • Step 1003 The UE or the UE RRC layer determines whether an RRC Connection Recovery message RRC Connection Recovery message or an RRC Connection Setup message or an RRC Connection Recovery Reject message is received; or whether the upper layer suspends the RRC connection recovery procedure; or whether cell reselection occurs. If yes, go to step 1004a; if no, go to step 1004b.
  • the RRC connection recovery message is sent by the eNB, and includes configuration information for restoring the RRC connection when the UE context is stored on the UE.
  • the RRC connection recovery reject message is sent by the eNB to reject the RRC connection recovery request of the UE.
  • Step 1004a The UE or the UE RRC layer stops the RRC connection recovery procedure monitoring timer.
  • step 1004a further includes returning a response message, and ending the RRC connection recovery procedure.
  • the step 1004a further includes: the UE or the UE RRC layer considers that the RRC connection recovery process fails, and reports the upper layer.
  • the step 1004a further includes the UE or the UE RRC layer releasing the UE context.
  • Step 1004b Determine whether the RRC connection recovery procedure timer expires. If yes, go to step 1005; if no, go back to step 1003.
  • Step 1005 The UE performs the following actions:
  • Behavior 1 The UE or the UE RRC layer considers that the current RRC connection recovery procedure has failed.
  • Behavior 2 The UE RRC layer notifies the upper layer that the RRC connection recovery procedure has failed.
  • Behavior 3 The UE or UE RRC layer releases the saved UE context.
  • Behavior 4 The UE or UE RRC layer or UE NAS layer triggers an RRC connection establishment procedure.
  • Behavior 5 Reset the MAC layer.
  • the behaviors 1 to 5 are optional, that is, the UE can perform one or more of the behaviors 1 to 5.
  • a typical behavior is that the UE performs the behavior 1 to 2, that is, the UE or the UE RRC layer considers that the current RRC connection recovery procedure fails and informs the upper layer.
  • the UE in this embodiment may be an NB-IoT UE, or may be another type of UE other than NB-IoT.
  • FIG. 11 shows a step of first performing a determination of whether the RRC connection recovery procedure timer expires, and then performing a determination of whether the UE or the UE RRC layer receives the RRC connection recovery message RRC connection recovery message or the RRC connection setup reject message or the RRC connection recovery reject message. Or whether the upper layer aborts the RRC connection recovery procedure; or if the cell reselection occurs.
  • 12 shows a step of determining whether the RRC connection recovery procedure timer has timed out and a step of determining whether the RRC connection recovery procedure timer has timed out, and then determining whether the UE or the UE RRC layer receives the RRC connection recovery message RRC connection recovery message or RRC connection. Establishing a message or RRC connection recovery reject message; or whether the upper layer aborts the RRC connection recovery procedure; or whether the step of cell reselection occurs in parallel.
  • FIG. 13 is a block diagram showing the structure of a UE 1300 according to Embodiment 5 of the present invention.
  • the UE 1300 includes an RRC Connection Recovery Process Management Unit 1310 and a timer management unit 1320.
  • the RRC Connection Recovery Process Management Unit 1310 is configured to trigger an RRC Connection Recovery procedure.
  • the timer management unit 1320 is configured to start an RRC connection recovery procedure monitoring timer when the RRC connection recovery procedure is triggered.
  • the RRC connection recovery procedure management unit 1310 is further configured to: if the RRC connection recovery procedure monitoring timer is running, the UE or the UE RRC layer receives an RRC connection recovery message or an RRC connection recovery reject message from the evolved node eNB or RRC connection setup message, or the upper layer aborted the RRC connection recovery The RRC connection recovery process is terminated, where the RRC connection recovery process includes configuration information for restoring the RRC connection when the eNB and the UE store the UE context.
  • the timer management unit 1320 is further configured to: if the RRC connection recovery procedure monitoring timer is running, the UE or the UE RRC layer receives an RRC connection recovery message or an RRC connection recovery reject message or an RRC connection from the evolved node eNB. The message is established, or the upper layer terminates the RRC connection recovery process, or the cell reselection occurs, and the UE RRC connection recovery process monitoring timer is stopped.
  • the UE further includes: a receiving unit, configured to receive, from the eNB, a configuration message including a value of the timer.
  • the above-described embodiments of the present invention can be implemented by software, hardware, or a combination of both software and hardware.
  • the base station and various components within the user equipment in the above embodiments may be implemented by various devices including, but not limited to, analog circuit devices, digital circuit devices, digital signal processing (DSP) circuits, and programmable processing. , Application Specific Integrated Circuits (ASICs), Field Programmable Gate Arrays (FPGAs), Programmable Logic Devices (CPLDs), and more.
  • ASICs Application Specific Integrated Circuits
  • FPGAs Field Programmable Gate Arrays
  • CPLDs Programmable Logic Devices
  • base station refers to a mobile communication data and control switching center having a large transmission power and a relatively large coverage area, including resource allocation scheduling, data reception and transmission, and the like.
  • User equipment refers to a user mobile terminal, for example, a terminal device including a mobile phone, a notebook, etc., which can perform wireless communication with a base station or a micro base station.
  • embodiments of the invention disclosed herein may be implemented on a computer program product.
  • the computer program product is a product having a computer readable medium encoded with computer program logic that, when executed on a computing device, provides related operations to implement The above technical solution of the present invention.
  • the computer program logic When executed on at least one processor of a computing system, the computer program logic causes the processor to perform the operations (methods) described in the embodiments of the present invention.
  • Such an arrangement of the present invention is typically provided as software, code and/or other data structures, or such as one or more, that are arranged or encoded on a computer readable medium such as an optical medium (e.g., CD-ROM), floppy disk, or hard disk.
  • the device is configured such that one or more processors in the computing device perform the technical solutions described in the embodiments of the present invention.

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Abstract

本发明提供了一种在用户设备UE处执行的RRC过程监测方法和相应的UE。所述方法包括：当所述UE或UE无线资源控制RRC层触发RRC连接恢复过程时，启动RRC连接恢复过程监测定时器。所述方法还包括：如果在所述RRC连接恢复过程监测定时器正在运行时，所述UE或UE RRC层从演进节点eNB接收到RRC连接恢复消息或RRC连接恢复拒绝消息或RRC连接建立消息，或上层中止了RRC连接恢复过程，或小区重选发生，则所述UE或UE RRC层停止所述UE RRC连接恢复过程监测定时器，结束RRC连接恢复过程，其中，所述RRC连接恢复消息包括当eNB和UE上存储了UE上下文时用于恢复RRC连接的配置信息。

Description

无线资源控制流程监测方法和设备 技术领域
本发明涉及无线通信技术领域。更具体地，本发明涉及设备间通信的信息配置方法以及基站和用户设备。
背景技术
随着物联网应用和物联网终端设备的广泛应用，设计出一种适应于物联网通信的无线网络技术成为必须解决的问题。第三代合作伙伴计划(3rd Generation Partnership Project，3GPP)正在研究一种新的接入系统，用于设计出一种低复杂性、低吞吐量的无线接入技术来解决无线物联网所面临的需求，称为窄带物联网(NarrowBand-Internet of Things，NB-IoT)。这种接入技术的特性包括支持低吞吐量的大量设备、低时延敏感度、超低设备成本，超低功耗和优化的网络架构。
在优化的网络架构方面，目前3GPP引入了一种解决方案，称为用户面解决方案，简述如下：
1.用户设备(UE，User Equipment)入网后，采用现有机制建立和网络侧的连接，进行数据传输，如图1所示进行无线资源控制(Radio Resource Control，RRC)连接建立、数据无线承载(Data Radio Bearer，DRB)建立和安全建立，然后若有需要则进行数据传输。
2.区别于在现有长期研究(Long Term Evolution，LTE)系统中，UE和演进基站(evolved NodeB，eNB)在数据传输完成后，释放RRC连接，删除UE上下文并进入RRC idle状态；在用户面解决方案中，当数据传输完成后，UE和eNB挂起RRC连接，保存UE上下文，如图1所示，eNB通过RRC信令告知UE挂起RRC连接并保存UE上下文。
3.如图2所示，当UE有上行数据发送或下行数据接收时，UE向eNB发起RRC连接恢复流程，因为UE和eNB上保存了UE上下文，通过该流程可以恢复其RRC连接，直接进行数据传输，而无需再通过RRC重配置流程进行DRB的建立，和无需通过安全 建立流程进行空口安全的建立。可以看出，通过这种方式，节省了空口的信令开销。
如上所述，用户面解决方案中通过引入RRC连接挂起/恢复流程来降低数据传输时的控制信令开销，那么当UE触发RRC连接恢复流程后，如何对RRC连接恢复流程进行监测称为需要解决的问题。
发明内容
如背景技术部分所述，用户面解决方案引入了新的RRC连接恢复流程，当该流程触发后，UE侧需要监测该流程是否成功完成，而现有机制中的RRC协议无法覆盖这一问题，因此，这正是本发明所关注并要解决的问题。
本发明所述方法并不限于背景技术部分所述的Release 13的NB-IoT系统，也适用于其他非NB-IoT装置和系统，如机器类型通信(Machine Type Communication，MTC)场景等。
根据本发明实施例的第一个方面，提供一种在用户设备UE处执行的RRC过程监测方法，包括：当所述UE或UE无线资源控制RRC层触发RRC连接恢复过程时，启动RRC连接恢复过程监测定时器。该方法还包括：如果在所述RRC连接恢复过程监测定时器正在运行时，所述UE或UE RRC层从演进节点eNB接收到RRC连接恢复消息或RRC连接恢复拒绝消息或RRC连接建立消息，或上层中止了RRC连接恢复过程，或小区重选发生，则所述UE或UE RRC层停止所述UE RRC连接恢复过程监测定时器，结束RRC连接恢复过程，其中，所述RRC连接恢复消息包括当eNB和UE上存储了UE上下文时用于恢复RRC连接的配置信息。
可选地，所述方法还包括：如果所述RRC连接恢复过程监测定时器到期，所述UE或UE RRC层认定RRC连接恢复过程失败。
可选地，所述方法还包括：从eNB接收包括所述定时器的值的配置消息。
可选地，所述配置消息是以广播方式发送的系统信息消息和/或UE专用RRC消息和/或媒介接入控制MAC层信令消息。
根据本发明的第二方面，提供了一种用户设备UE，用于监测RRC连接恢复过程。所述UE包括：RRC连接恢复过程管理单元，被配置为触发RRC连接恢复过程；以及定时器管理单元，被配置为当RRC连接恢复过程被触发时启动RRC连接恢复过程监测定时器，其中RRC连接恢复过程管理单元还被配置为：如果在所述RRC连接恢复过程监测定时器正在运行时所述UE或UE RRC层从演进节点eNB接收到RRC连接恢复消息或RRC连接恢复拒绝消息或RRC连接建立消息，或上层中止了RRC连接恢复过程，或小区重选发生，结束RRC连接恢复过程，其中，所述RRC连接恢复消息包括当eNB和UE上存储了UE上下文时用于恢复RRC连接的配置信息；定时器管理单元还被配置为：如果在所述RRC连接恢复过程监测定时器正在运行时所述UE或UE RRC层从演进节点eNB接收到RRC连接恢复消息或RRC连接恢复拒绝消息或RRC连接建立消息，或上层中止了RRC连接恢复过程，或小区重选发生，停止所述UE RRC连接恢复过程监测定时器。
可选地，所述UE还包括：接收单元，被配置为从eNB接收包括所述定时器的值的配置消息。
参照后文的说明和附图，详细公开了本发明的特定实施方式，指明了本发明的原理可以被采用的方式。应该理解，本发明的实施方式在范围上并不因而受到限制。在所附权利要求的精神和条款的范围内，本发明的实施方式包括许多改变、修改和等同。
针对一种实施方式描述和/或示出的特征可以以相同或类似的方式在一个或更多个其它实施方式中使用，与其它实施方式中的特征相组合，或替代其它实施方式中的特征。
应该强调，术语“包括/包含”在本文使用时指特征、整件、步骤或组件的存在，但并不排除一个或更多个其它特征、整件、步骤或组件的存在或附加。
附图说明
参照以下的附图可以更好地理解本发明的很多方面。附图中的部件不是成比例绘制的，而只是为了示出本发明的原理。为了便于示出和描 述本发明的一些部分，附图中对应部分可能被放大或缩小。
在本发明的一个附图或一种实施方式中描述的元素和特征可以与一个或更多个其它附图或实施方式中示出的元素和特征相结合。此外，在附图中，类似的标号表示几个附图中对应的部件，并可用于指示多于一种实施方式中使用的对应部件。
图1是RRC连接挂起示意图；
图2是RRC连接恢复流程示意图；
图3是根据本发明的在UE处执行的RRC过程监测方法的流程图。
图4是根据本发明实施例1的基站侧配置的一种流程示意图。
图5是根据本发明实施例1的UE侧配置的一种流程示意图。
图6是根据本发明实施例1的基站和UE间信息交互的一种流程示意图。
图7是本发明实施例2的UE侧处理的一种流程示意图。
图8是本发明实施例3的UE侧处理的一种流程示意图。
图9是本发明实施例4的UE侧处理的一种流程示意图。
图10-12是本发明实施例5的UE侧处理的一种流程示意图。
图13是根据本发明实施例6的UE的一构成示意图。
具体实施方式
参照附图，通过下面的说明书，本发明的前述以及其它特征将变得明显。在说明书和附图中，具体公开了本发明的特定实施方式，其表明了其中可以采用本发明的原则的部分实施方式，应了解的是，本发明不限于所描述的实施方式，相反，本发明包括落入所附权利要求的范围内的全部修改、变型以及等同物。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。
以下将结合附图和具体实施例，对本发明所提出的一种RRC流程监测方法进行进一步说明。
下文以LTE移动通信系统及其后续的演进版本作为示例应用环境，以NB-IoT为实施技术场景，具体描述了根据本发明的多个实施例。然 而，需要指出的是，本发明不限于以下实施例，而是可适用于更多其它的无线通信系统，例如今后的5G蜂窝通信系统。
图3是示出了根据本发明的在UE处执行的RRC过程监测方法300的流程图。
如图所示，该方法包括步骤301，其中，当所述UE或UE无线资源控制RRC层触发RRC连接恢复过程时，启动RRC连接恢复过程监测定时器。该方法还包括步骤302，其中，如果在所述RRC连接恢复过程监测定时器正在运行时，所述UE或UE RRC层从演进节点eNB接收到RRC连接恢复消息或RRC连接恢复拒绝消息或RRC连接建立消息，或上层中止了RRC连接恢复过程，或小区重选发生，则所述UE或UE RRC层停止所述UE RRC连接恢复过程监测定时器，结束RRC连接恢复过程，其中，所述RRC连接恢复消息包括当eNB和UE上存储了UE上下文时用于恢复RRC连接的配置信息。
通过设置定时器，可以有效地监测RRC过程。
以下依次详细描述本发明的实施例1～6。
实施例1
图4为本发明实施例1中基站侧配置流程图。
步骤401：eNB发送一个配置消息，其中包含RRC连接恢复流程监测定时器配置信息，该定时器用于监测RRC连接恢复流程。所述RRC连接恢复流程用于当eNB上存储了UE上下文时的RRC连接恢复。
在本实施例中，所述配置信息包含所述定时器的值。举例，以所述定时器命名为T308为例，所述配置信息包含T308的取值为200ms。
所述eNB发送的配置消息可以是RRC消息，一种方式是以广播方式发送的系统信息消息如第二系统信息块(System Information Block 2，SIB2)，另一种方式是UE专用RRC消息如RRC连接重配置消息、RRC连接挂起消息等；也可以是媒介接入控制(Medium Access Control，MAC)层信令，如随机接入响应等。上述仅为配置消息的部分实施方式举例，并不限于此。
该实施例中的eNB可以是采用NB-IoT接入技术的eNB，也可以是 其他类型eNB。
图5为本发明实施例1中UE侧配置流程图。
步骤501：UE接收配置消息，其中包含RRC连接恢复流程监测定时器配置信息，该定时器用于监测RRC连接恢复流程。所述RRC连接恢复流程用于当UE上存储了UE上下文时的RRC连接恢复。
在本实施例中，所述配置信息包含所述定时器的值。举例，以所述定时器命名为T308为例，所述配置信息包含T308的取值为200ms。
所述UE接收的配置消息可以是RRC消息，一种方式是以广播方式发送的系统信息消息如SIB2，另一种方式是UE专用RRC消息如RRC连接重配置消息、RRC连接挂起消息等；也可以是MAC信令，如随机接入响应等。上述仅为配置消息的部分实施方式举例，并不限于此。
该实施例中的UE可以是NB-IoT UE，也可以是非NB-IoT的其他类型UE。
步骤502：UE应用所接收到的RRC连接恢复流程监测定时器配置信息，并根据该定时器配置信息进行RRC连接恢复流程的监测。UE根据该定时器监测RRC连接恢复流程的具体实现方式在实施例2～5中给出了示例，但并不限于此。
图6为本发明实施例1中基站和UE间的信息交互流程图。
步骤601：eNB向UE发送一个配置消息。其中包含RRC连接恢复流程监测定时器配置信息，该定时器用于监测RRC连接恢复流程。UE接收并应用所接收到的RRC连接恢复流程监测定时器配置信息，并根据该定时器配置信息进行RRC连接恢复流程的监测。所述RRC连接恢复流程用于当eNB和UE上存储了UE上下文时的RRC连接恢复。
在本实施例中，所述配置信息包含所述定时器的值。举例，以所述定时器命名为T308为例，所述配置信息包含T308的取值为200ms。
所述配置消息可以是RRC消息，一种方式是以广播方式发送的系统信息消息如SIB2，另一种方式是UE专用RRC消息如RRC连接重配置消息、RRC连接挂起消息等；也可以是MAC信令，如随机接入响应等。上述仅为配置消息的部分实施方式举例，并不限于此。
该实施例中，UE根据该定时器监测RRC连接恢复流程的具体实现 方式在实施例2～5中给出了示例，但并不限于此。
该实施例中的UE可以是NB-IoT UE，也可以是非NB-IoT的其他类型UE。
可选地，UE成功收到该配置消息后，向eNB返回响应消息。举例，若配置消息为RRC连接重配置消息，则UE会返回RRC连接重配置完成消息作为响应。
实施例2
图7为本发明实施例2中UE侧处理流程图。本实施例提供了一种UE侧根据RRC连接恢复流程监测定时器配置信息进行RRC连接恢复流程监测的方法。
步骤701：UE或UE RRC层触发RRC连接恢复流程。所述RRC连接恢复流程用于当UE上存储了UE上下文时的RRC连接恢复。
步骤702：UE或UE RRC层启动RRC连接恢复流程监测定时器。该定时器用于监测RRC连接恢复流程。
该实施例中的UE可以是NB-IoT UE，也可以是非NB-IoT的其他类型UE。
实施例3
图8为本发明实施例3中UE侧处理流程图。本实施例提供了一种UE侧根据RRC连接恢复流程监测定时器配置信息进行RRC连接恢复流程监测的方法。
步骤801：UE或UE RRC层接收RRC连接恢复消息或RRC连接建立消息或RRC连接恢复拒绝消息；或上层中止了RRC连接恢复流程；或小区重选发生。所述RRC连接恢复消息由eNB发送，包含当eNB和UE上存储了UE上下文时用于恢复RRC连接的配置信息。所述RRC连接恢复拒绝消息由eNB发送，用于拒绝UE的RRC连接恢复请求。
步骤802：UE或UE RRC层停止RRC连接恢复流程监测定时器。该定时器用于监测RRC连接恢复流程。
可选的，若步骤801为UE或UE RRC层接收RRC连接恢复消息或 RRC连接建立消息，则步骤802还包括返回响应消息，并结束RRC连接恢复流程。
可选的，若步骤801中为UE或UE RRC层接收RRC连接恢复拒绝消息，或小区重选发生，则步骤802还包括UE或UE RRC层认为RRC连接恢复流程失败，并上报上层。
可选的，若步骤801中为UE或UE RRC层接收RRC连接恢复拒绝消息或RRC连接建立消息，或上层中止了RRC连接恢复流程；则步骤802还包括UE或UE RRC层释放UE上下文。
该实施例中的UE可以是NB-IoT UE，也可以是非NB-IoT的其他类型UE。
实施例4
图9为本发明实施例中UE侧处理流程图。本实施例提供了一种UE侧根据RRC连接恢复流程监测定时器配置信息进行RRC连接恢复流程监测的方法。
步骤901：RRC连接恢复流程定时器超时。该定时器用于监测RRC连接恢复流程。
步骤902：UE执行以下行为：
行为1：UE或UE RRC层认为本次RRC连接恢复流程失败。
行为2：UE RRC层向上层通知本次RRC连接恢复流程失败。
行为3：UE或UE RRC层释放所保存的UE上下文。
行为4：UE或UE RRC层或UE非接入(Non-Access Stratum)层触发RRC连接建立流程。
行为5：重置MAC层。
在该步骤中，行为1～5是可选的，即UE可以执行行为1～5中的一种或多种。典型的行为是UE执行行为1～2，即UE或UE RRC层认为本次RRC连接恢复流程失败并告知上层。
该实施例中的UE可以是NB-IoT UE，也可以是非NB-IoT的其他类型UE。
实施例5
图10为本发明实施例中UE侧处理流程图。本实施例提供了一种UE侧根据RRC连接恢复流程监测定时器配置信息进行RRC连接恢复流程监测的方法。
步骤1001：UE或UE RRC层触发RRC连接恢复流程。
所述RRC连接恢复流程用于当UE上存储了UE上下文时的RRC连接恢复。
步骤1002：UE或UE RRC层启动RRC连接恢复流程监测定时器。
该定时器用于监测RRC连接恢复流程。
步骤1003：UE或UE RRC层判断是否收到RRC连接恢复消息RRC连接恢复消息或RRC连接建立消息或RRC连接恢复拒绝消息；或是否上层中止了RRC连接恢复流程；或是否小区重选发生。如果是，则执行步骤1004a；如果否，则执行步骤1004b.
所述RRC连接恢复消息由eNB发送，包含当UE上存储了UE上下文时用于恢复RRC连接的配置信息。所述RRC连接恢复拒绝消息由eNB发送，用于拒绝UE的RRC连接恢复请求。
步骤1004a：UE或UE RRC层停止RRC连接恢复流程监测定时器。
可选的，若步骤1003为UE或UE RRC层接收RRC连接恢复消息或RRC连接建立消息，则步骤1004a还包括返回响应消息，并结束RRC连接恢复流程。
可选的，若步骤1003中为UE或UE RRC层接收RRC连接恢复拒绝消息，或小区重选发生，则步骤1004a还包括UE或UE RRC层认为RRC连接恢复流程失败，并上报上层。
可选的，若步骤1003中为UE或UE RRC层接收RRC连接恢复拒绝消息或RRC连接建立消息，或上层中止了RRC连接恢复流程；则步骤1004a还包括UE或UE RRC层释放UE上下文。
步骤1004b：判断RRC连接恢复流程定时器是否超时。如果是，则执行步骤1005；如果否，则返回执行步骤1003。
步骤1005：UE执行以下行为：
行为1：UE或UE RRC层认为本次RRC连接恢复流程失败。
行为2：UE RRC层向上层通知本次RRC连接恢复流程失败。
行为3：UE或UE RRC层释放所保存的UE上下文。
行为4：UE或UE RRC层或UE NAS层触发RRC连接建立流程。
行为5：重置MAC层。
在该步骤中，行为1～5是可选的，即UE可以执行行为1～5中的一种或多种。典型的行为是UE执行行为1～2，即UE或UE RRC层认为本次RRC连接恢复流程失败并告知上层。
该实施例中的UE可以是NB-IoT UE，也可以是非NB-IoT的其他类型UE。
本领域技术人员将理解：图10所示的方法是说明性而非限制性的。具体地，该方法的实现可以不依赖于图10所示的执行操作的特定顺序。
例如，图11示出了先执行判断RRC连接恢复流程定时器是否超时的步骤再执行判断UE或UE RRC层是否收到RRC连接恢复消息RRC连接恢复消息或RRC连接建立消息或RRC连接恢复拒绝消息；或是否上层中止了RRC连接恢复流程；或是否小区重选发生的步骤的情形。图12示出了判断RRC连接恢复流程定时器是否超时的步骤和判断RRC连接恢复流程定时器是否超时的步骤再执行判断UE或UE RRC层是否收到RRC连接恢复消息RRC连接恢复消息或RRC连接建立消息或RRC连接恢复拒绝消息；或是否上层中止了RRC连接恢复流程；或是否小区重选发生的步骤并行执行的情形。
实施例6
图13示出了根据本发明实施例5的UE 1300的结构示意图。如图所示，UE 1300包括RRC连接恢复过程管理单元1310和定时器管理单元1320。RRC连接恢复过程管理单元1310被配置为触发RRC连接恢复过程。定时器管理单元1320被配置为当RRC连接恢复过程被触发时启动RRC连接恢复过程监测定时器。RRC连接恢复过程管理单元1310还被配置为：如果在所述RRC连接恢复过程监测定时器正在运行时所述UE或UE RRC层从演进节点eNB接收到RRC连接恢复消息或RRC连接恢复拒绝消息或RRC连接建立消息，或上层中止了RRC连接恢复过 程，或小区重选发生，结束RRC连接恢复过程，其中，所述RRC连接恢复消息包括当eNB和UE上存储了UE上下文时用于恢复RRC连接的配置信息。定时器管理单元1320还被配置为：如果在所述RRC连接恢复过程监测定时器正在运行时所述UE或UE RRC层从演进节点eNB接收到RRC连接恢复消息或RRC连接恢复拒绝消息或RRC连接建立消息，或上层中止了RRC连接恢复过程，或小区重选发生，停止所述UE RRC连接恢复过程监测定时器。
可选地，所述UE还包括：接收单元，被配置为从eNB接收包括所述定时器的值的配置消息。
应该理解，本发明的上述实施例可以通过软件、硬件或者软件和硬件两者的结合来实现。例如，上述实施例中的基站和用户设备内部的各种组件可以通过多种器件来实现，这些器件包括但不限于：模拟电路器件、数字电路器件、数字信号处理(DSP)电路、可编程处理器、专用集成电路(ASIC)、现场可编程门阵列(FPGA)、可编程逻辑器件(CPLD)，等等。
在本申请中，“基站”是指具有较大发射功率和较广覆盖面积的移动通信数据和控制交换中心，包括资源分配调度、数据接收发送等功能。“用户设备”是指用户移动终端，例如包括移动电话、笔记本等可以与基站或者微基站进行无线通信的终端设备。
此外，这里所公开的本发明的实施例可以在计算机程序产品上实现。更具体地，该计算机程序产品是如下的一种产品：具有计算机可读介质，计算机可读介质上编码有计算机程序逻辑，当在计算设备上执行时，该计算机程序逻辑提供相关的操作以实现本发明的上述技术方案。当在计算系统的至少一个处理器上执行时，计算机程序逻辑使得处理器执行本发明实施例所述的操作(方法)。本发明的这种设置典型地提供为设置或编码在例如光介质(例如CD-ROM)、软盘或硬盘等的计算机可读介质上的软件、代码和/或其他数据结构、或者诸如一个或多个ROM或RAM或PROM芯片上的固件或微代码的其他介质、或一个或多个模块中的可下载的软件图像、共享数据库等。软件或固件或这种配置可安装在计算 设备上，以使得计算设备中的一个或多个处理器执行本发明实施例所描述的技术方案。
尽管以上已经结合本发明的优选实施例示出了本发明，但是本领域的技术人员将会理解，在不脱离本发明的精神和范围的情况下，可以对本发明进行各种修改、替换和改变。因此，本发明不应由上述实施例来限定，而应由所附权利要求及其等价物来限定。

Claims (8)

  1. 一种在用户设备UE处执行的RRC过程监测方法，包括：
    当所述UE或UE无线资源控制RRC层触发RRC连接恢复过程时，启动RRC连接恢复过程监测定时器；以及
    如果在所述RRC连接恢复过程监测定时器正在运行时，所述UE或UE RRC层从演进节点eNB接收到RRC连接恢复消息或RRC连接恢复拒绝消息或RRC连接建立消息，或上层中止了RRC连接恢复过程，或小区重选发生，则所述UE或UE RRC层停止所述UE RRC连接恢复过程监测定时器，结束RRC连接恢复过程，其中，所述RRC连接恢复消息包括当eNB和UE上存储了UE上下文时用于恢复RRC连接的配置信息。
  2. 根据权利要求1所述的方法，还包括：
    如果所述RRC连接恢复过程监测定时器到期，所述UE或UE RRC层认定RRC连接恢复过程失败。
  3. 根据权利要求1或2所述的方法，还包括：从eNB接收包括所述定时器的值的配置消息。
  4. 根据权利要求3所述的方法，其中，所述配置消息是以广播方式发送的系统信息消息和/或UE专用RRC消息和/或媒介接入控制MAC层信令消息。
  5. 一种用户设备UE，用于监测RRC连接恢复过程，所述UE包括：
    RRC连接恢复过程管理单元，被配置为触发RRC连接恢复过程；以及
    定时器管理单元，被配置为当RRC连接恢复过程被触发时启动RRC连接恢复过程监测定时器，其中
    RRC连接恢复过程管理单元还被配置为：如果在所述RRC连接恢复过程监测定时器正在运行时所述UE或UE RRC层从演进节点eNB接收到RRC连接恢复消息或RRC连接恢复拒绝消息或RRC连接建立消息，或上层中止了RRC连接恢复过程，或小区重选发生，结束RRC连接恢复过程，其中，所述RRC连接恢复消息包括当eNB和UE上存储 了UE上下文时用于恢复RRC连接的配置信息，
    定时器管理单元还被配置为：如果在所述RRC连接恢复过程监测定时器正在运行时所述UE或UE RRC层从演进节点eNB接收到RRC连接恢复消息或RRC连接恢复拒绝消息或RRC连接建立消息，或上层中止了RRC连接恢复过程，或小区重选发生，停止所述UE RRC连接恢复过程监测定时器。
  6. 根据权利要求5所述的UE，其中，
    如果所述RRC连接恢复过程监测定时器到期，所述UE或UE RRC层认定RRC连接恢复过程失败。
  7. 根据权利要求5或6所述的UE，还包括：接收单元，被配置为从eNB接收包括所述定时器的值的配置消息。
  8. 根据权利要求7所述的UE，其中，所述配置消息是以广播方式发送的系统信息消息和/或UE专用RRC消息和/或媒介接入控制MAC层信令消息。
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