WO2019242484A1 - 接入控制方法及用户设备 - Google Patents

接入控制方法及用户设备 Download PDF

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Publication number
WO2019242484A1
WO2019242484A1 PCT/CN2019/089521 CN2019089521W WO2019242484A1 WO 2019242484 A1 WO2019242484 A1 WO 2019242484A1 CN 2019089521 W CN2019089521 W CN 2019089521W WO 2019242484 A1 WO2019242484 A1 WO 2019242484A1
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Prior art keywords
access
rnau
timer
access control
control method
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PCT/CN2019/089521
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English (en)
French (fr)
Inventor
张崇铭
刘仁茂
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夏普株式会社
张崇铭
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Application filed by 夏普株式会社, 张崇铭 filed Critical 夏普株式会社
Priority to US17/253,247 priority Critical patent/US11405850B2/en
Priority to KR1020217000269A priority patent/KR20210020073A/ko
Priority to EP19822695.3A priority patent/EP3813436B1/en
Publication of WO2019242484A1 publication Critical patent/WO2019242484A1/zh

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    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W74/00—Wireless channel access
    • H04W74/002—Transmission of channel access control information
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W68/00—User notification, e.g. alerting and paging, for incoming communication, change of service or the like
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W36/00—Hand-off or reselection arrangements
    • H04W36/08—Reselecting an access point
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W48/00—Access restriction; Network selection; Access point selection
    • H04W48/02—Access restriction performed under specific conditions
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W48/00—Access restriction; Network selection; Access point selection
    • H04W48/16—Discovering, processing access restriction or access information
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W68/00—User notification, e.g. alerting and paging, for incoming communication, change of service or the like
    • H04W68/005—Transmission of information for alerting of incoming communication
    • 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
    • H04W76/00—Connection management
    • H04W76/10—Connection setup
    • H04W76/19—Connection re-establishment
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W76/00—Connection management
    • H04W76/20—Manipulation of established connections
    • H04W76/27—Transitions between radio resource control [RRC] states

Definitions

  • the present invention relates to the field of wireless communication technology, and more particularly, the present invention relates to an access control method in a user equipment related to an access network notification area update, and a corresponding base station and user equipment.
  • RNAU access network Notification Area
  • the UE executes an update process RNAU (RAN Notification Area) of the access network notification area.
  • RNAU access network notification area
  • the UE moves to a new cell, the cell does not belong to the access network notification area (RNA) previously saved by the UE, and the UE also performs RNAU.
  • the UE initiates a process of restoring the RRC connection, and sends an RRC Connection Resume Request message to the network side to request the restoration of the RRC connection.
  • the UE in order to control the access of the UE, the UE needs to perform an access control check before initiating the connection establishment.
  • Each type of access request is assigned a corresponding access category, and the UE performs a corresponding access control check according to the access category corresponding to the access request.
  • access control check results There are two types of access control check results.
  • One is barring, which means that access is prohibited.
  • the UE will start an access prohibition timer (hereinafter also referred to as the access category) corresponding to the access category.
  • the barring timer For the barring timer, and set a certain duration.
  • the barring timer stops running the UE can re-initiate access.
  • the other is no barring, that is, the UE can directly initiate access.
  • the UE can trigger an access because of the RNAU.
  • the UE During the access check process, if the check result is barring, the UE needs to wait for the barring timer to stop running before initiating access.
  • the barring timer is stopped when an event occurs or the conditions are met. Usually, the UE enters the connected state, and the barring timer is stopped; the UE has a cell reselection, and the barring timer is stopped; it may also be that the UE has an abnormality and enters the idle state, and the barring timer is stopped.
  • the UE can re-initiate a connection establishment request.
  • the triggering cause of the RNAU process is time-efficient and regional. So once the barring timer is stopped, the UE will re-initiate the connection request for RNAU, which may result in invalid RNAU. For example, when the UE enters the connected state, the barring timer is stopped. It is meaningless to initiate an RNAU connection request at this time.
  • the RNAU is to inform the network UE of its current position, while the connected UE is aware of its current position by the network side.
  • the barring timer is stopped, and the selected cell still belongs to the RNA maintained by the UE. Then, it is also meaningless to initiate an RNAU connection request, because one of the triggering reasons of the RNAU is the UE The location of the UE has changed, and the cell in which it resides does not belong to the saved RNA list. Now the cell where the UE is located still belongs to the RNA stored on the UE side, that is, the location of the UE has not changed significantly. meaningful. How to avoid these meaningless RRC connection restoration requests is a problem to be solved.
  • An object of the present invention is to provide an access control method and a user equipment in a user equipment which can avoid meaningless RNAU connection requests and thereby improve the utilization efficiency of communication resources.
  • an access control method in a user equipment UE which includes: in a case where an access control check result is an access prohibition, starting an access prohibition timer; and in determining To prevent the access timer from being stopped, determine whether to trigger the access network to notify the area to update the RNAU according to at least one of the following conditions.
  • the conditions include: whether the current connection status of the UE is in an inactive state, and whether the UE Whether the RNAU timer started when entering the inactive state is running, and whether the cell where the UE currently resides belongs to the access network notification area RNA.
  • the RNAU may not be triggered when the current connection state of the UE is not in an inactive state.
  • the RNAU may be triggered when the current connection state of the UE is in an inactive state and the RNAU timer is not in a running state.
  • the RNAU may be triggered when the current connection state of the UE is in an inactive state and the cell in which the UE currently resides does not belong to the RNA.
  • the RNAU may be triggered when the current connection state of the UE is in an inactive state, the RNAU timer is running, and the cell where the UE currently resides does not belong to the RNA.
  • the RNAU may not be triggered when the current connection state of the UE is in an inactive state, the RNAU timer is running, and the cell in which the UE currently resides belongs to the RNA.
  • the access prohibition timer may stop running when the running timeout expires, or may be stopped running in any of the following situations, which includes: a cell reselection occurs in the UE ; UE enters connected state; when UE enters idle state or leaves inactive state.
  • the access prohibition timer is in a stopped state
  • the access type corresponding to the access prohibition timer is an access type selected by RRC or an access related to RNAU. In the case of species, decide whether to trigger RNAU.
  • a user equipment including: a processor; and a memory storing instructions; wherein the instructions execute the foregoing access control method when run by the processor.
  • FIG. 1 shows a flowchart of an access control method in a user equipment according to an embodiment of the present invention
  • FIG. 2 shows a block diagram of a user equipment according to an embodiment of the present invention.
  • the NR mobile communication system and its subsequent evolved versions are used as an example application environment, and a base station and a UE device supporting NR are taken as examples to describe a plurality of embodiments according to the present invention in detail.
  • the present invention is not limited to the following embodiments, but can be applied to more other wireless communication systems, such as eLTE communication systems, and can also be applied to other base stations and UE devices, such as eLTE-enabled base stations and UEs. device.
  • the Elte communication system means that the UE uses the LTE system (or EUTRA technology) to communicate with the base station on the air interface, but the non-access layer of the UE is connected to the 5G core network instead of the EPC.
  • the trigger layer of the access request will at least provide information such as access category to perform access control checks.
  • the trigger layer of the access request may be an access layer (AS layer).
  • the access request triggered by the access layer may be an RRC connection restoration request, that is, an RRC Connection Resumption process. In this process, the UE sends an RRC connection restoration request message to the network side, and the message carries an access reason, indicating the reason value for initiating the connection request.
  • the AS layer of the UE performs access barring control based on at least the access type information.
  • Forbidden means that the UE can consider the current cell access to be forbidden / not allowed (consider access to the cell as barred); it can also be the UE to consider that the establishment of a new PDU session (session) in the current cell is not allowed / forbidden of.
  • Allowed means that the UE considers that the current cell access is allowed; it can also mean that the UE considers that it is allowed to establish a new PDU session in the current cell.
  • the UE may start a barring access timer.
  • This barring access timer may correspond to the access type. Once this barring access timer is not running, it means that its The prohibited access of the corresponding access type is released.
  • the UE can be in an inactive state (INACTIVE state). In this state, the RRC connection of the UE is suspended, and the network side can know the access network notification area where the UE is located. The UE side holds information of the effective access network notification area. When the UE comes to / reselects a cell, the system information of the cell will broadcast the access network notification area to which the cell belongs. If the UE finds that the current cell does not belong to the access network notification area it holds, or the current cell location The access network notification area that it belongs to is different from the access network notification area that it keeps, and the UE needs to notify the network side.
  • IACTIVE state In NR / eLTE, the UE can be in an inactive state (INACTIVE state). In this state, the RRC connection of the UE is suspended, and the network side can know the access network notification area where the UE is located. The UE side holds information of the effective access network notification area. When the UE comes to / reselects a cell
  • the UE will perform the operation of the access network notification area update, which includes the UE initiating restoration of connection establishment.
  • Request the UE requests to resume the RRC connection (resume / RRC Connection) by sending an RRC connection restoration request message to the network side, and indicates the identity of the UE in the inactive state in the request message.
  • the network side After the network side receives the RRC connection restoration request message, it searches for the UE information according to the identity of the UE in the inactive state, and updates the context of the UE, especially the information of the access network notification area where the UE is located; and the UE It also updates the information in the access network notification area that it saves to complete the RNAU process.
  • RNAU timer which is used to control the UE to perform RNAU periodically. Specifically, when this timer expires, the UE will trigger an RNAU process.
  • T380 this timer is named T380.
  • FIG. 1 shows a flowchart of an access control method 100 in a user equipment UE according to an embodiment of the present invention. As shown in FIG. 1, the method 100 includes steps S110 and S120.
  • step S110 in a case where the access control check result is that access is prohibited, the UE starts an access prohibition timer.
  • step S120 when the UE determines that the access prohibition timer is in a stopped state, it determines whether to trigger the access network to notify the area to update the RNAU according to at least one of the following conditions, and the condition includes: the UE's current connection Whether the state is in the inactive state, whether the RNAU timer started when the UE enters the inactive state is in the running state, and whether the cell in which the UE currently resides belongs to the access network notification area RNA.
  • the RNAU is not triggered as long as the access prohibition timer is in a stopped state, but whether to trigger the RNAU according to the conditions, and the RNAU is not triggered if the conditions are not met.
  • the above conditions may include: whether the current connection state of the UE is in an inactive state, whether an RNAU timer started when the UE enters an inactive state is in a running state, and whether a cell in which the UE currently resides belongs to the access network notification area RNA.
  • RNAU is not triggered if the current connection state of the UE is not in an inactive state, or RNAU is not triggered if the cell in which the UE currently resides belongs to RNA, thereby avoiding these In this case, the connection request of the meaningless RNAU can improve the utilization efficiency of communication resources.
  • the UE does not trigger the RNAU
  • RNAU If the cell where the UE currently resides does not belong to the RNA region, trigger an RNAU;
  • RNAU If the cell where the UE currently resides belongs to the RNA region, no RNAU is triggered.
  • the barring timer refers to a timer related to barring, which can be understood as a timer that is started when an access check result of an access category is an access barring. Stopping the barring timer can be that the barring timer has timed out, or the running barring timer has been stopped. The UE can stop the running barring timer in the following situations.
  • Case 2 The UE enters the connected state. This situation may occur when the UE receives an RRC Connection Setup (RRCConnectionSetup) message or an RRCConnectionResume message.
  • RRCConnectionSetup RRC Connection Setup
  • RRCConnectionResume RRCConnectionResume
  • the barring timer can be a barring timer corresponding to the access type to which the RNAU belongs or the barring timer.
  • the network side pre-defined a specific access type for such access, or the network side broadcasts in the system information the UE belongs to the RNAU initiated access.
  • the access type is the access type to which the RNAU belongs.
  • Each access category has its corresponding barring timer. When the access check result of the access category is forbidden, its corresponding barring timer is started.
  • Triggering the RNAU herein may refer to initializing or starting an RRC connection recovery process, and preferably, a cause value / cause value carried in an RRC Connection Resume message to be sent during this process (establish value) is set to RNA update (rna-Update) or information related to RNA update.
  • Do not trigger RNAU herein may also mean that the UE does not perform the RRC connection recovery process related to RNAU.
  • the “cell in which the UE currently camps” herein may be a cell in which the UE camps when the barring timer stops, or a cell in which the UE enters, or a cell in which the UE has undergone cell reselection and is selected. At the same time, the barring timer was stopped due to cell reselection.
  • “Does not belong to the RNA region” may mean that the RNA to which the cell belongs is different from the RNA information saved / recorded by the UE, and specifically, the RNA ID may be different, wherein the UE can obtain the RNA to which the cell belongs from the system information broadcast by the cell. Or RNA ID, or the cell does not belong to the RNA stored by the UE.
  • the RNAU is triggered
  • RNAU is triggered.
  • RNAU is triggered.
  • the access type corresponding to the barring timer is selected by the RRC, it implies or indicates that the access is triggered by the RRC layer.
  • the reason triggered by the RRC layer can be only RNAU. Therefore, the access corresponding to the barring timer is When the entry type is selected by RRC, the trigger of RNAU is determined as described above.
  • the UE When the barring timer corresponding to a certain access category stops operating, the UE considers that the access prohibition of the corresponding access category is released. If the access category is related to or relative to RNAU, then:
  • RNAU is triggered.
  • RNAU can be expressed as the UE is in the INACTIVE state Under the conditions, and the T380 is not running, the UE triggers the RNAU.
  • Embodiment 1 The difference from Embodiment 1 is that a corresponding operation is triggered through an intermediate instruction process.
  • the RRC layer further performs the following operations:
  • the RNAU is not triggered
  • RNAU If the cell where the UE currently resides does not belong to the RNA region, trigger an RNAU;
  • RNAU If the cell where the UE currently resides belongs to the RNA region, no RNAU is triggered.
  • the RRC layer may further perform the following operations:
  • RNAU is triggered.
  • FIG. 2 shows a block diagram of a user equipment UE20 according to an embodiment of the present invention.
  • the UE 20 includes a processor 210 and a memory 220.
  • the processor 210 may include, for example, a microprocessor, a microcontroller, an embedded processor, and the like.
  • the memory 220 may include, for example, a volatile memory (such as a random access memory RAM), a hard disk drive (HDD), a nonvolatile memory (such as a flash memory), or other memories.
  • the memory 220 stores program instructions. When the instruction is executed by the processor 210, the foregoing access control method in the user equipment described in detail in the present invention may be executed.
  • the program running on the device according to the present invention may be a program that causes a computer to realize 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 volatile memory (such as random access memory RAM), hard disk drive (HDD), non-volatile memory (such as flash memory), or other memory systems.
  • a program for implementing the functions of the embodiments of the present invention may be recorded on a computer-readable recording medium.
  • 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 for a short-term dynamic storage program, or any other recording medium readable by a computer.
  • circuits 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.
  • the present invention is not limited to the embodiments described above. Although various examples of the embodiments have been described, the present invention is not limited thereto.
  • Fixed or non-mobile electronic equipment installed indoors or outdoors can be used as terminal equipment or communication equipment, such as AV equipment, kitchen equipment, cleaning equipment, air conditioners, office equipment, vending machines, and other household appliances.

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Abstract

本发明提供一种用户设备中的接入控制方法及用户设备，能够避免无意义的RNAU的连接请求，从而提高通信资源的利用效率。所述用户设备中的接入控制方法包括：在执行接入控制检查的结果是禁止接入的情况下，启动禁止接入定时器；以及在判断为禁止接入定时器处于停止运行状态的情况下，根据如下条件中的至少一个来决定是否触发接入网通知区域更新RNAU，所述条件包括：UE当前的连接状态是否处于非激活态、UE进入非激活态时启动的RNAU定时器是否处于运行状态、UE当前驻留的小区是否属于接入网通知区域RNA。

Description

接入控制方法及用户设备 技术领域
本发明涉及无线通信技术领域，更具体地，本发明涉及与接入网通知区域更新有关的用户设备中的接入控制方法以及相应的基站和用户设备。
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、海量物联网终端的通信需求，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NR系统中，当UE进入非激活态(以下也称为INACTIVE)时，会启动定时器T380，当T380超时时，UE执行接入网通知区域的更新流程RNAU(RAN Notification Area Updating)。此外，当UE移动到一个新小区，该小区不属于UE之前保存的接入网通知区域(RNA)，UE也会执行RNAU。为了进行RNAU，UE会发起恢复(resume)RRC连接的过程，通过向网络侧发送RRC连接恢复请求(RRC Connection resume request)消息，请求恢复RRC连接。
与此同时，在NR系统中，为了控制UE的接入，UE在发起连接建立之前，需要进行接入控制的检查。每种类型的接入请求被分配了相应的接入种类(access category)，UE根据接入请求对应的接入种类(access category)进行相应的接入控制检查。
接入控制的检查结果有两种，一种结果为barring即禁止接入，在这种情况下，UE侧会启动相应于该接入种类(access category)的禁止接入定时器(以下也称为barring timer)，并设置一定的时长。当barring timer停止运行后，UE可以重新发起接入。另外一种是no barring，即UE可以直接发起接入。
结合前面所述的UE可以因为RNAU而触发一次接入，在进行接入检查的过程中，如果检查结果为barring，那么UE需要等待barring timer停止运行，然后再发起接入。
barring timer停止运行有两种原因。
原因一：barring timer运行直到超时
原因二：当某事件发生或者满足条件时，barring timer被停止。通常可以是UE进入了连接态，barring timer被停止；UE发生了小区重选，barring timer被停止；还可以是UE侧发生异常，进入了空闲态，barring timer被停止。
无论哪种原因，当barring timer停止时，UE可以重新再发起连接建立请求。但是，与一般的数据传输触发连接建立请求不同，RNAU过程的触发原因是有时效性和区域性的。所以一旦barring timer停止，UE就重新发起连接请求以进行RNAU，可能会导致无效的RNAU。例如，当UE进入了连接态，barring timer被停止，如果这个时候再发起RNAU的连接请求，是无意义的。RNAU是为了通知网络UE当前的位置，而处于连接态的UE，其当前的位置是被网络侧感知的。再例如，当UE发生了小区重选，barring timer被停止，被选的小区仍然属于UE侧保持的RNA，那么这时候发起RNAU的连接请求，也是无意义的，因为RNAU的一个触发原因就是UE的位置发生了变化，其驻留的小区不属于保存的RNA列表，而现在UE所处的小区仍然属于UE侧保存的RNA，即 UE的位置没有发生显著的变化，这个时候进行的RNAU是无意义的。如何避免这些无意义的RRC连接恢复请求，是需要解决的问题。
发明内容
本发明的目的在于，提供一种能够避免无意义的RNAU的连接请求从而提高通信资源的利用效率的用户设备中的接入控制方法以及用户设备。
根据本发明的第一方面，提供了一种用户设备UE中的接入控制方法，包括：在执行接入控制检查的结果是禁止接入的情况下，启动禁止接入定时器；以及在判断为禁止接入定时器处于停止运行状态的情况下，根据如下条件中的至少一个来决定是否触发接入网通知区域更新RNAU，所述条件包括：UE当前的连接状态是否处于非激活态、UE进入非激活态时启动的RNAU定时器是否处于运行状态、UE当前驻留的小区是否属于接入网通知区域RNA。
在上述接入控制方法中，可以是，在UE当前的连接状态未处于非激活态的情况下，不触发RNAU。
在上述接入控制方法中，可以是，在UE当前的连接状态处于非激活态、且RNAU定时器未处于运行状态的情况下，触发RNAU。
在上述接入控制方法中，可以是，在UE当前的连接状态处于非激活态、且UE当前驻留的小区不属于RNA的情况下，触发RNAU。
在上述接入控制方法中，可以是，在UE当前的连接状态处于非激活态、RNAU定时器处于运行状态、且UE当前驻留的小区不属于RNA的情况下，触发RNAU。
在上述接入控制方法中，可以是，在UE当前的连接状态处于非激活态、RNAU定时器处于运行状态、且UE当前驻留的小区属于RNA的情况下，不触发RNAU。
在上述接入控制方法中，可以是，禁止接入定时器在运行超时的情况下停止运行，或者在如下情况的任意一种情况下被停止运行，所述情况包括：UE发生了小区重选；UE进入了连接态；UE进入空闲态或离开非激活态时。
在上述接入控制方法中，可以是，在禁止接入定时器处于停止运行状态、且该禁止接入定时器对应的接入种类是由RRC选择的接入种类或者是与RNAU相关的接入种类的情况下，决定是否触发RNAU。
在上述接入控制方法中，可以是，基于在禁止接入定时器停止运行时生成的表示与该禁止接入定时器对应的接入种类的禁止接入解除的指示，决定是否触发RNAU。
根据本发明的第二方面，提供了一种用户设备，包括：处理器；以及存储器，存储有指令；其中，所述指令在由所述处理器运行时执行上述的接入控制方法。
发明效果
根据本发明的用户设备中的接入控制方法以及用户设备，能够避免无意义的RNAU的连接请求，从而能够提高通信资源的利用效率。
附图说明
通过下文结合附图的详细描述，本发明的上述和其它特征将会变得更加明显，其中：
图1示出了根据本发明实施例的用户设备中的接入控制方法的流程图；
图2示出了根据本发明实施例的用户设备的框图。
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。
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。
Figure PCTCN2019089521-appb-000001
Figure PCTCN2019089521-appb-000002
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。这里Elte通信系统是指UE在空口上采用LTE制式(或者EUTRA技术)与基站通信，但是UE非接入层连接的是5G核心网而非EPC。
<接入控制>
为了进行接入控制，接入请求的触发层至少会提供接入种类(access category)等信息来进行接入控制检查。其中接入请求的触发层可以是接入层(AS层)。接入层触发的接入请求可以是请求恢复RRC连接，即RRC连接恢复(RRC Connection Resumption)过程。在这一过程中，UE向网络侧发送RRC连接恢复请求消息，消息中携带了接入原因(access cause)，指明发起该连接请求的原因值。
UE的AS层至少基于接入种类信息执行接入禁止控制(access barring check)。
接入禁止控制的结果有两种，一种是禁止(barring)，还有一种是允许(not barring/allowed)。
禁止，是指UE可以认为当前小区接入是禁止的/不允许的(consider access to the cell as barred)；还可以是UE认为当前小区建立新的PDU会话(session)是不被允许的/禁止的。
允许，是指UE认为当前小区接入是允许的(consider access to the cell as not barred)；还可以是UE认为在当前小区建立新的PDU会话(session)是被允许的。
当接入禁止控制的结果是禁止时，UE可以启动禁止接入定时器，这个禁止接入定时器可以是对应于该接入种类的，一旦这个禁止接入定 时器不运行，那么意味着其相应的接入种类的禁止接入被解除。
<接入网通知区域更新(RAN notification area updating，RNAU)>
在NR/eLTE中，UE可以处于非激活态(INACTIVE态)，在这种状态下，UE的RRC连接是挂起(suspend)的，网络侧可以知道UE所处的接入网通知区域。UE侧保存着有效的接入网通知区域的信息。当UE来到/重选到一个小区，小区的系统信息中会广播该小区所属于的接入网通知区域，如果UE发现当前小区不属于其保存的接入网通知区域，或者是当前小区所属于的接入网通知区域与其保存的接入网通知区域不相同，UE就需要通知网络侧，在这种情况下，UE会进行接入网通知区域更新的操作，具体包括UE发起恢复连接建立请求，UE通过向网络侧发送RRC连接恢复请求消息请求恢复RRC连接(resume RRC Connection)，并在请求消息中指示UE在非激活态下的标识。网络侧接收到RRC连接恢复请求消息后，根据UE在非激活态下的标识，查找UE信息，对UE的上下文进行更新，特别是要更新UE所处的接入网通知区域的信息；而UE也会对其保存的接入网通知区域的信息进行更新，从而完成RNAU的过程。
当UE进入INACTIVE时，会启动一个定时器，这个定时器可以被称为RNAU timer，用来控制UE周期性地进行RNAU，具体表现为：当这个定时器超时时，UE会触发一个RNAU的过程，具体的操作如前文所述。在NR中，这个定时器的名称为T380。
图1示出了根据本发明实施例的用户设备UE中的接入控制方法100的流程图。如图1所示，方法100包括步骤S110和步骤S120。
在步骤S110中，UE在执行接入控制检查的结果是禁止接入的情况下，启动禁止接入定时器。
在步骤S120中，UE在判断为禁止接入定时器处于停止运行状态的情况下，根据如下条件中的至少一个来决定是否触发接入网通知区域更新RNAU，所述条件包括：UE当前的连接状态是否处于非激活态、UE进入非激活态时启动的RNAU定时器是否处于运行状态、UE当前驻留的小区是否属于接入网通知区域RNA。
根据上述方法100，并不是只要禁止接入定时器处于停止运行状态 就触发RNAU，而是根据条件来决定是否触发RNAU，在不满足条件的情况下不触发RNAU。上述条件可以包括：UE当前的连接状态是否处于非激活态、UE进入非激活态时启动的RNAU定时器是否处于运行状态、UE当前驻留的小区是否属于接入网通知区域RNA。
例如，虽然禁止接入定时器处于停止运行状态，但是如果UE当前的连接状态未处于非激活态则不触发RNAU，或者如果UE当前驻留的小区属于RNA则不触发RNAU，由此避免了这些情况下的无意义的RNAU的连接请求，从而能够提高通信资源的利用效率。
以下，详细描述本发明的若干实施例。
实施例1
当barring timer停止运行时，判断UE是否处于INACTIVE状态，
-如果UE不处于INACTIVE状态或者UE处于连接态，UE不触发RNAU；
-如果UE处于INACTIVE状态，进一步判断T380是否处于运行状态；
-如果T380没有在运行，触发RNAU；
-如果T380在运行，进一步判断UE当前驻留的小区是否属于RNA区域；
-如果UE当前驻留的小区不属于RNA区域，触发RNAU；
-如果UE当前驻留的小区属于RNA区域，不触发RNAU。
其中，barring timer是指与禁止接入(barring)相关的定时器，可以理解为当某个接入种类(access category)的接入检查结果是禁止接入时所启动的定时器。barring timer停止运行可以是barring timer运行超时，还可以是运行的barring timer被停止。UE可以在下述情况下停止运行的barring timer。
情况一：UE发生了小区重选
情况二：UE进入了连接态，这个情况可以发生在UE接收到了RRC连接建立(RRCConnectionSetup)消息或者RRC连接恢复(RRCConnectionResume)消息时。
情况三：UE进入空闲态或者离开INACTIVE状态时。
优选的，这个barring timer可以是对应于RNAU所属于或者所对应的接入种类对应的barring timer。例如，UE为了进行RNAU发起接入，对于此类接入，网络侧给其预定义了特定的接入种类，或者是网络侧在系统信息中广播了UE为进行RNAU发起的接入所属于的接入种类，即为RNAU所属于的接入种类。每个接入种类有其相应的barring timer，当该接入种类的接入检查结果是禁止接入时，则启动其相应的barring timer。
本文中“触发RNAU”可以是指初始化或者启动RRC连接恢复过程，以及优选地，将在这一过程中将要发送的RRC连接恢复(RRCConnectionResume)消息中携带的原因值(cause value)/建立原因值(establish cause value)设置为RNA更新(rna-Update)，或者是与RNA更新相关的信息。
本文中“不触发RNAU”还可以是指UE不进行与RNAU相关的RRC连接恢复过程。
本文中“UE当前驻留的小区”，可以是barring timer停止时UE所驻留的小区，还可以是UE进入的一个小区，还可以是UE发生了小区重选，被选择的那个小区。同时，由于发生了小区重选，barring timer被停止。“不属于RNA区域”可以是指该小区所属的RNA与UE保存/记录的RNA信息不同，具体可以是RNA ID不同，其中，UE可以通过在该小区广播的系统信息中获得该小区所属的RNA或者RNA ID，又或者是该小区不属于UE保存的RNA。
上述过程的又一实施方式可以是
当barring timer停止运行时，
如果UE处于INACTIVE状态，并且T380没有在运行，触发RNAU；
如果UE处于INACTIVE状态，并且UE当前驻留的小区不属于RNA区域，触发RNAU。
上述过程的又一实施方式还可以是
当barring timer停止运行时，如果barring timer对应的接入种类(access category)是由RRC选择的或者对应的接入种类(access category) 是和RNAU相关的，那么
-如果UE处于INACTIVE状态，并且T380没有在运行，那么触发RNAU；
-如果UE处于INACTIVE状态，并且UE当前驻留的小区不属于RNA区域，那么触发RNAU。
其中，如果barring timer对应的接入种类是由RRC选择的，暗示或者表明这个接入是由RRC层触发的，目前RRC层触发的接入原因可以仅仅为RNAU，所以，在barring timer对应的接入种类是由RRC选择的情况下，如上述那样决定RNAU的触发。
上述过程的又一实现方式还可以是
当对应于某一接入种类(access category)的barring timer停止运行时，UE认为相应的接入种类(access category)的禁止接入解除。如果所述的接入种类(access category)是与RNAU相关或者相对于RNAU的，那么：
-如果UE处于INACTIVE状态，并且T380没有在运行，那么触发RNAU；
-如果UE处于INACTIVE状态，并且UE当前驻留的小区不属于RNA区域，那么触发RNAU。
需要说明的是，在本实施例中所述的“如果”可以理解为满足特定的条件，例如“如果UE处于INACTIVE状态，并且T380没有在运行，那么触发RNAU”可以表示为在UE处于INACTIVE状态的条件下，并且T380没有在运行的条件下，UE触发RNAU。
实施例2
和实施例1的区别在于通过一个中间指示过程来触发相应的操作。
当barring timer停止运行时，向RRC层指示或者UE生成指示：与该barring timer相对应的接入种类(access category)的禁止接入解除。
基于该指示或者考虑到该指示，RRC层进一步执行下述操作：
-如果UE不处于INACTIVE状态或者UE处于连接态，不触发 RNAU；
-如果UE处于INACTIVE状态，进一步判断T380是否处于运行状态；
-如果T380没有在运行，触发RNAU；
-如果T380在运行，进一步判断UE当前驻留的小区是否属于RNA区域；
-如果UE当前驻留的小区不属于RNA区域，触发RNAU；
-如果UE当前驻留的小区属于RNA区域，不触发RNAU。
还可以是基于该指示，RRC层进一步执行下述操作：
-如果UE处于INACTIVE状态，并且T380没有在运行，那么触发RNAU；
-如果UE处于INACTIVE状态，并且UE当前驻留的小区不属于RNA区域，那么触发RNAU。
图2示出了根据本发明实施例的用户设备UE20的框图。如图2所示，UE20包括处理器210和存储器220。处理器210例如可以包括微处理器、微控制器、嵌入式处理器等。存储器220例如可以包括易失性存储器(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)、或其他存储器等。存储器220上存储有程序指令。该指令在由处理器210运行时，可以执行本发明详细描述的用户设备中的上述接入控制方法。
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终端设备或通信设备，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 (3)

  1. 一种用户设备UE中的接入控制方法，包括：
    针对一种接入种类执行接入控制检查；
    在执行接入控制检查的结果是禁止接入的情况下，启动针对所述接入种类的禁止接入定时器；以及
    在发生小区重选的情况下，停止所述禁止接入定时器，并且判定针对所述接入种类的禁止接入被解除，
    在针对所述接入种类的禁止接入被解除后，当满足如下所有条件时，触发无线资源控制RRC连接恢复过程，所述条件包括：
    所述被解除禁止接入的接入种类与接入网通知区域更新RNAU相关联、
    UE当前的连接状态处于非激活态、
    UE进入非激活态时启动的RNAU定时器处于非运行状态。
  2. 根据权利要求1所述的接入控制方法，其中，
    指明触发所述RRC连接恢复过程的原因是RNAU。
  3. 一种用户设备，包括：
    处理器；以及
    存储器，存储有指令；其中，所述指令在由所述处理器运行时执行根据权利要求1或2所述的接入控制方法。
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CN110621080A (zh) 2019-12-27
US20210266818A1 (en) 2021-08-26
EP3813436A4 (en) 2021-11-10
KR20210020073A (ko) 2021-02-23
US11405850B2 (en) 2022-08-02
EP3813436B1 (en) 2024-04-17

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