WO2011098046A1

WO2011098046A1 - Tracking area identity list allocation method and device

Info

Publication number: WO2011098046A1
Application number: PCT/CN2011/070942
Authority: WO
Inventors: 周燕飞; 艾明; 张娟; 徐晖; 熊春山; 田野
Original assignee: 电信科学技术研究院
Priority date: 2010-02-11
Filing date: 2011-02-11
Publication date: 2011-08-18
Also published as: CN102118730A; CN102118730B

Abstract

A Tracking Area Identity (TAI) list allocation method and device are provided in the present invention. The allocation method includes that: a Mobile Management Entity (MME) judges if a terminal belongs to a Mobile Originated Only (MO) device or an Infrequent Mobile Terminated (MT) device (S102); and if the terminal belongs to an MO device or an MT device, the MME includes all the subordinate Tracking Area (TA) in a Tracking Area Identity (TAI) list and allocates the TAI list to the terminal (S104), so that the terminal initiates a course of Tracking Area Update (TAU) only during passing through the MME. According to at least one technical solution of the present invention, by allocating a TAI list that is big enough to the MO device or the MT device, the TAU frequency of the MO device or the MT device can be reduced. By taking use of the allocation method, the performance of Mobile Management can be optimized; and the MME always know the location of the terminal, thereby can set up a connection with the device through paging.

Description

跟踪区标识列表的分配方法和装置 Method and device for allocating tracking area identification list

技术领域 Technical field

本发明涉及通信领域，尤其涉及一种跟踪区标识列表的分配方法和装置。背景技术 The present invention relates to the field of communications, and in particular, to a method and an apparatus for allocating a tracking area identification list. Background technique

机器类通信 ( Machine Type Communication )是指机器与机器之间、通过移动运营商的通信网络进行的通信。 Machine Type Communication refers to communication between a machine and a machine via a mobile operator's communication network.

MTC设备 ( Machine Type Communication Device, 机器类通信设备) 是通信网络中专用于机器类通信的终端设备，如远程抄表设备、视频监控设备等。 MTC 设备是一种无人参与的、特殊类型的通信终端。 MTC equipment (Machine Type Communication Device) is a terminal device dedicated to machine type communication in a communication network, such as a remote meter reading device, a video monitoring device, and the like. The MTC device is an unattended, special type of communication terminal.

MTC 服务器（Machine Type Communication Server, 简称机器类通信服务器）是指通过通信网络与 MTC设备进行通信的设备，如智能抄表*** 的服务器、智能公交***服务器等。 The MTC server (Machine Type Communication Server) refers to a device that communicates with an MTC device through a communication network, such as a server of a smart meter reading system, an intelligent bus system server, and the like.

MTC设备根据应用的不同分为多种特性。其中， Mobile Originated Only 设备（仅由终端发起通信的设备，简称 MO设备）是一种仅由终端发起通信的设备，其特点是终端与网络之间的通信都由终端发起，网络不会向终端发起寻呼。 MTC devices are divided into multiple features depending on the application. The Mobile Originated Only device (the device that initiates communication only by the terminal, referred to as the MO device) is a device that initiates communication only by the terminal, and is characterized in that the communication between the terminal and the network is initiated by the terminal, and the network does not reach the terminal. Initiate a page.

TS 22.368定义了针对 MO设备的业务需求： TS 22.368 defines the business requirements for MO devices:

- 网络应该为网络运营商提供一种机制在 MTC Device粒度上减少移动性管理过程的频率； - The network should provide a mechanism for the network operator to reduce the frequency of the mobility management process at the MTC Device granularity;

-网络运营商应该可以配置设备使其仅在终端发起通信时执行移动性管理过程。 - The network operator should be able to configure the device to perform the mobility management process only when the terminal initiates communication.

MT设备（ Infrequent Mobile Terminated )是另一种 MTC设备，是指设备主要进行终端发起的通信，但是仍然有不频繁的终端终止的通信。 The MT device (Infrequent Mobile Terminated) is another MTC device, which means that the device mainly performs terminal-initiated communication, but there are still infrequent terminal terminated communication.

TS 22.368定义了针对 MT设备特性的业务需求： -网络运营商应当可以在 MTC Device粒度上减少移动性管理过程的频率； TS 22.368 defines the business requirements for MT device characteristics: - The network operator should be able to reduce the frequency of the mobility management process at the MTC Device granularity;

-同时对于 MT设备，网络运营商应当可以减少由于设备移动引起的移动性管理过程。 - At the same time for MT equipment, the network operator should be able to reduce the mobility management process caused by equipment movement.

从以上两种设备的业务需求来看，都需要对其移动性管理进行优化。下面介绍核心网中的移动性管理过程。 From the perspective of the business needs of the above two devices, it is necessary to optimize their mobility management. The following describes the mobility management process in the core network.

EPS ***对空闲态终端进行移动性管理的粒度是跟踪区（ Tracking Area, TA )。终端初始附着到网络时，移动性管理实体（ Mobile Management Entity,筒称 MME )为其分配一个包含一个或多个 TA的 TAI列表（ Tracking Area Identity List, TAI List )。当终端进入一个不属于已注册 TAI列表的 TA 时，将主动发起 TAU过程， MME在 TAU过程中为终端分配新的包含当前 TA 在内的 TAI 列表。除了附着（Attach ) 与跟踪区更新（Tracking Area Update， TAU )过程，网络还可以在全球唯一临时标识重分配（ Global Unique Temporary Identity Reallocation, GUTI Reallocation ) 过程中为终端分配新的 TAI列表。 The granularity of the EPS system for mobility management of idle state terminals is the Tracking Area (TA). When the terminal is initially attached to the network, the mobility management entity (Mobile Management Entity, MME) allocates a TAI List (TAI List) containing one or more TAs. When the terminal enters a TA that does not belong to the registered TAI list, the TAU process is initiated. The MME allocates a new TAI list containing the current TA to the terminal during the TAU process. In addition to the Attach and Tracking Area Update (TAU) process, the network can also assign a new TAI list to the terminal during the Global Unique Temporary Identity Reallocation (GUTI Reallocation) process.

当网络需要与空闲态终端进行通信时，通过寻呼过程与终端建立连接。 MME向 TAI列表下所有 TA内的基站发送寻呼消息，终端在哪个基站内响应寻呼消息就表明其所在的基站和 TA。 When the network needs to communicate with the idle terminal, a connection is established with the terminal through the paging process. The MME sends a paging message to the base stations in all TAs under the TAI list, and the base station and TA in which the terminal responds to the paging message indicates the base station and the TA.

TAI列表的大小与寻呼信令量多少是相互矛盾的，也即 TAI列表越大，用户移动时跨越 TAI 列表边界的频度越小，因此 TAU的频率越小，但大的 TAI 列表使得寻呼时信令量很大，对其他用户的干扰也越多；对应的， TAI 列表越小，只在小范围内发送寻呼，信令量就越少，但终端发生 TAU 的频度会比较大。因此分配合适的 TAI 列表对优化***性能非常重要。 The size of the TAI list is contradictory to the amount of paging signaling. That is, the larger the TAI list, the smaller the frequency of the TAI list boundary when the user moves, so the smaller the TAU frequency, the larger the TAI list makes the search. The amount of call timing is large, and the interference to other users is more. Correspondingly, the smaller the TAI list is, the smaller the range is, the less the signalling is, but the frequency of TAUs in the terminal is compared. Big. Therefore, assigning the appropriate TAI list is very important to optimize system performance.

针对两种设备的特性， 3GPP SA1工作组提出了减少移动性管理过程频率的需求，但目前没有提出具体实施方法。 Regarding the characteristics of the two devices, the 3GPP SA1 working group proposed a need to reduce the frequency of the mobility management process, but no specific implementation method has been proposed at present.

很容易想到的一种减少移动性管理频率的方法是延长周期性 TAU定时器的超时时间，但这仍然不能避免移动中的设备因为跨越 TAU 列表边界而发生 TAU。比如固定在鸟类身上的传感器设备，假设***预设每月发送一次数据，然而由于设备的移动，在不发送数据时也可能频繁地做 TAU。由于 MTC设备数量众多，这些不必要的信令开销将降低***的效率、增加运营和维护的成本。发明内容 One way to easily reduce the mobility management frequency is to extend the timeout of the periodic TAU timer, but this still does not prevent the mobile device from having a TAU across the TAU list boundary. For example, a sensor device fixed on a bird, assuming that the system presets to send data once a month, but due to the movement of the device, TAU may be frequently performed when data is not transmitted. By With a large number of MTC devices, these unnecessary signaling overheads will reduce the efficiency of the system and increase the cost of operation and maintenance. Summary of the invention

针对相关技术中存在的一个或多个问题，本发明的目的在于提供一种跟踪区标识列表的分配方法和装置，以解决上述问题中的至少之一。 In view of one or more problems existing in the related art, an object of the present invention is to provide a method and apparatus for allocating a tracking area identification list to solve at least one of the above problems.

为实现上述目的，根据本发明的实施例，提供了一种跟踪区标识列表的分配方法，包括：移动性管理实体判断终端是否属于仅由终端发起通信的设备或不频繁的终端终止设备；以及如果终端属于仅由终端发起的设备或不频繁的终端终止设备，则移动性管理实体将下属所有跟踪区都包括在跟踪区标识列表中并将跟踪区标识列表分配给终端，使得终端仅在跨移动性管理实体时才发起跟踪区更新过程。 In order to achieve the above object, according to an embodiment of the present invention, a method for allocating a tracking area identifier list is provided, including: the mobility management entity determining whether the terminal belongs to a device that initiates communication only by the terminal or an infrequent terminal termination device; If the terminal belongs to a device initiated only by the terminal or an infrequent terminal termination device, the mobility management entity includes all the tracking areas of the subordinate in the tracking area identification list and assigns the tracking area identification list to the terminal, so that the terminal is only in the cross The tracking area update process is initiated only when the mobility management entity.

为实现上述目的，根据本发明的实施例，提供了一种跟踪区标识列表的分配装置，包括：终端类型判断模块，用于判断终端是否属于仅由终端发起通信的设备或不频繁的终端终止设备；以及跟踪区标识列表分配模块，用于在终端属于仅由终端发起的设备或不频繁的终端终止设备的情况下，将移动性管理实体下属的所有跟踪区都包括在跟踪区标识列表中并将跟踪区标识列表分配给终端，使得终端仅在跨移动性管理实体时才发起跟踪区更新过程。 In order to achieve the above object, according to an embodiment of the present invention, a device for distributing a tracking area identifier list is provided, including: a terminal type determining module, configured to determine whether a terminal belongs to a device that initiates communication only by a terminal or terminates an infrequent terminal. And a tracking area identifier list allocation module, configured to include all tracking areas subordinate to the mobility management entity in the tracking area identifier list if the terminal belongs to a device initiated only by the terminal or an infrequent terminal termination device The tracking area identification list is assigned to the terminal, so that the terminal initiates the tracking area update process only when it crosses the mobility management entity.

借助本发明上述至少一个技术方案，通过为仅由终端发起通信的设备或不频繁的终端终止设备分配足够大的 TAI 列表，可以减少其 TAU的频率。因此，釆用这种分配方式，可以优化移动性管理的性能，并且 MME 总是知道终端的位置，不影响网络对设备位置的可知性。附图说明 With the above at least one aspect of the present invention, the frequency of its TAU can be reduced by allocating a sufficiently large TAI list for devices that initiate communication only by the terminal or infrequent terminal termination devices. Therefore, with this allocation method, the performance of mobility management can be optimized, and the MME always knows the location of the terminal and does not affect the network's visibility of the device location. DRAWINGS

图 1是根据本发明的实施例的移动性管理实体与跟踪区的示意图；图 2是根据本发明的实施例的跟踪区标识列表的分配方法的流程图；以及 1 is a schematic diagram of a mobility management entity and a tracking area according to an embodiment of the present invention; FIG. 2 is a flowchart of a method for allocating a tracking area identification list according to an embodiment of the present invention;

图 3是根据本发明的实施例的跟踪区标识列表的分配装置的框图。具体实施方式 3 is a block diagram of a distribution device of a tracking area identification list in accordance with an embodiment of the present invention. detailed description

在机器类通信中，有两类特殊的设备： Mobile Originated Only (仅由终端发起通信的设备，简称 MO设备）和 Infrequent Mobile Terminated (主要由终端发起通信的设备或不频繁的终端终止的（通信）的设备，后者指设备主要用于终端发起的通信，然而仍然可以进行不频繁的终端终止的通信。基于这两种设备的特点， 3GPP SA1工作组提出了减少移动性管理过程的需求，但没有提出具体方案。本发明提出一种通过特殊的 TAI列表的分配来优化移动性管理、减少设备与网络间信令的方法。 In machine type communication, there are two types of special devices: Mobile Originated Only (only devices initiated by the terminal, referred to as MO devices) and Infrequent Mobile Terminated (devices that are mainly initiated by the terminal or terminated by infrequent terminals (communication) The latter means that the device is mainly used for terminal-initiated communication, but can still perform infrequent terminal-terminated communication. Based on the characteristics of these two devices, the 3GPP SA1 working group proposed a need to reduce the mobility management process. However, no specific solution has been proposed. The present invention proposes a method for optimizing mobility management and reducing signaling between devices and networks through special allocation of TAI lists.

MO 设备的通信仅由终端发起， ***无需向其发送寻呼消息，因此也不存在寻呼信息量过大的问题，也就是说，对于 MO设备，为其分配 TAI 列表时，可以不用考虑寻呼量对 TAI列表的制约。 The communication of the MO device is initiated only by the terminal, and the system does not need to send a paging message to it, so there is no problem that the paging information is too large. That is to say, for the MO device, when the TAI list is allocated, it is not necessary to consider The call volume has a constraint on the TAI list.

MT 设备主要进行终端发起的通信，仅有不频繁的寻呼，因此即使寻呼量稍大，整体上也不会对***产生太大的影响。 The MT device mainly performs terminal-initiated communication, and only has infrequent paging. Therefore, even if the amount of paging is slightly larger, the system as a whole does not have much influence on the system.

基于以上两种设备的特性，为其分配 TAI列表时，可以分配一个尽量大的 TAI列表，使得设备由于进入一个不属于已分配 TAI列表的 TA而发生 TAU的概率最小。 "尽量大" 的 TAI列表可以通过图 1所示的实例说明。 Based on the characteristics of the above two devices, when assigning a TAI list to it, a TAI list can be allocated as large as possible, so that the device has the lowest probability of generating a TAU by entering a TA that does not belong to the allocated TAI list. The "as large as possible" TAI list can be illustrated by the example shown in Figure 1.

如图 1所示，假设 MME1将下属 TAl-TA n-1都分配给终端，考虑以下两种情况： As shown in Figure 1, it is assumed that MME1 assigns subordinates TAl-TA n-1 to the terminal. Consider the following two cases:

1 ) 当终端进入 TAn时，由于 TAn不属于已分配的 TAI 列表，仍会发生 TAU过程，但实际上此时 MME并没有改变； 1) When the terminal enters TAn, since the TAn does not belong to the allocated TAI list, the TAU process still occurs, but in fact the MME does not change at this time;

2 ) 当终端进入 TAa时，由于 TAa不属于已分配的 TAI 列表，同样会发生 TAU过程，但此时 MME改变， MME2将从 MME1处获得终端的上下文信息。 2) When the terminal enters TAa, since the TAa does not belong to the allocated TAI list, the TAU process also occurs, but at this time, the MME changes, and the MME2 obtains the terminal's context information from the MME1.

比较以上两种情况，基于尽量减少移动性管理频率的思想，可以认为在同一个 MME下发生的 TAU都属于 "不必要" 的移动性管理过程，而跨 MME的 TAU由于需要在 MME之间交换终端的上下文才能保持终端始终注册在网络中，因此是必须的。 Comparing the above two cases, based on the idea of minimizing the mobility management frequency, it can be considered that the TAUs occurring under the same MME belong to the "unnecessary" mobility management process, and the TAUs across the MME need to be exchanged between the MMEs. The context of the terminal is necessary to keep the terminal always registered in the network, so it is necessary.

本发明的实施例提出一种能够减少移动性管理频率的方法：分配 TAI 列表时， MME将下属所有 TA都包含在 TAI 列表中分配给终端，使得终端只有在跨 MME时才发起 TAU过程。 Embodiments of the present invention propose a method capable of reducing mobility management frequency: Allocating TAI In the case of the list, the MME allocates all the subordinate TAs to the terminal in the TAI list, so that the terminal initiates the TAU process only when it crosses the MME.

图 2是根据本发明的实施例的一种跟踪区标识列表的分配方法的流程图。如图 2所示，该跟踪区标识列表的分配方法包括： 2 is a flow diagram of a method of assigning a tracking area identification list in accordance with an embodiment of the present invention. As shown in FIG. 2, the method for allocating the tracking area identifier list includes:

步骤 S102 , 移动性管理实体判断终端是否属于仅由终端发起通信的设备或不频繁的终端终止设备；以及 Step S102: The mobility management entity determines whether the terminal belongs to a device that initiates communication only by the terminal or an infrequent terminal termination device;

步骤 S104 , 如果终端属于仅由终端发起的设备或不频繁的终端终止设备，则移动性管理实体将下属所有跟踪区都包括在跟踪区标识列表中并将跟踪区标识列表分配给终端，使得终端仅在跨移动性管理实体时才发起跟踪区更新过程。 Step S104: If the terminal belongs to a device initiated only by the terminal or an infrequent terminal termination device, the mobility management entity includes all the tracking areas of the subordinate in the tracking area identification list and allocates the tracking area identification list to the terminal, so that the terminal The tracking area update process is initiated only when the mobility management entity is crossed.

其中，当终端进行附着时，或在全球唯一临时标识重分配过程中，或在位置更新过程中，可以执行分配方法。 Wherein, when the terminal attaches, or during the global unique temporary identification redistribution process, or during the location update process, the allocation method can be performed.

移动性管理实体可以根据终端的签约数据判断终端是否属于仅由终端发起的设备或不频繁的终端终止设备。 The mobility management entity may determine, according to the subscription data of the terminal, whether the terminal belongs to a device initiated only by the terminal or an infrequent terminal termination device.

如果终端移动导致移动性管理实体改变，则进行跟踪区更新过程，新的移动性管理实体获得终端的相关信息之后，根据分配方法给终端重新分配跟踪区标识列表。 If the mobility of the terminal causes the mobility management entity to change, the tracking area update process is performed. After the new mobility management entity obtains the relevant information of the terminal, the tracking area identification list is re-allocated to the terminal according to the allocation method.

当终端与 MME有信令连接时 MME可以发起全球唯一临时标识重分配过程，同时在该过程中根据分配方法给终端重新分配跟踪区标识列表。 When the terminal has a signaling connection with the MME, the MME may initiate a global unique temporary identity re-allocation process, and at the same time, re-allocate the tracking area identifier list to the terminal according to the allocation method.

跟踪区标识列表包括一个或多个部分跟踪区标识列表，部分跟踪区标识列表包括一个或多个跟踪区。部分跟踪区标识列表为以下三种类型之一：所包含跟踪区标识在同一个公共陆地移动网，但是编码不连续；所包含跟踪区标识在同一个公共陆地移动网，但是编码连续；以及所包含跟踪区标识不在同一个公共陆地移动网。 The tracking area identification list includes one or more partial tracking area identification lists, and the partial tracking area identification list includes one or more tracking areas. The partial tracking area identification list is one of the following three types: the included tracking area identifier is on the same public land mobile network, but the coding is discontinuous; the included tracking area identifier is on the same public land mobile network, but the coding is continuous; The tracking area identifier is not in the same public land mobile network.

通过扩展跟踪区标识列表中的元素数量的表示范围来增加跟踪区标识列表所能包括的跟踪区数量。跟踪区标识列表分配模块扩展跟踪区标识列表中的元素数量的最高位，来增加跟踪区标识列表所能包括的跟踪区数量。跟踪区标识列表分配模块可以通过进一步增加跟踪区标识列表的数量，来增加分配给终端的总的跟踪区数量。所包含跟踪区标识包括：移动国家码、移动网络码、和跟踪区码。在所包含跟踪区标识在同一个公共陆地移动网并且编码不连续时，移动国家码和移动网络码相同，跟踪区标识列表采用压縮编码格式。 The number of tracking areas that can be included in the tracking area identification list is increased by extending the representation range of the number of elements in the tracking area identification list. The tracking area identification list allocation module expands the highest bit of the number of elements in the tracking area identification list to increase the number of tracking areas that can be included in the tracking area identification list. The tracking area identification list allocation module can increase the total number of tracking areas allocated to the terminal by further increasing the number of tracking area identification lists. The included tracking area identifiers include: a mobile country code, a mobile network code, and a tracking area code. When the included tracking area is identified on the same public land mobile network and the coding is discontinuous, the mobile country code and the mobile network code are the same, and the tracking area identification list adopts a compression coding format.

在所包含跟踪区标识在同一个公共陆地移动网并且编码连续时，所包含的跟踪区标识具有相同的移动国家码和移动网络码，跟踪区标识列表釆用压缩编码格式并且仅标识第一个跟踪区的跟踪区标识。 When the included tracking area is identified on the same public land mobile network and the coding is continuous, the included tracking area identifier has the same mobile country code and mobile network code, and the tracking area identification list uses the compression encoding format and identifies only the first one. Tracking area identifier of the tracking area.

图 3是根据本发明的实施例的一种跟踪区标识列表的分配装置的框图。如图 3所示，该跟踪区标识列表的分配装置包括：终端类型判断模块 302 , 用于判断终端是否属于仅由终端发起通信的设备或不频繁的终端终止设备；以及跟踪区标识列表分配模块 304 , 用于在终端属于仅由终端发起的设备或不频繁的终端终止设备的情况下，将移动性管理实体下属的所有跟踪区都包括在跟踪区标识列表中并将跟踪区标识列表分配给终端，使得终端仅在跨移动性管理实体时才发起跟踪区更新过程。 3 is a block diagram of a distribution device for tracking area identification lists in accordance with an embodiment of the present invention. As shown in FIG. 3, the apparatus for allocating the tracking area identifier list includes: a terminal type determining module 302, configured to determine whether the terminal belongs to a device that initiates communication only by the terminal or an infrequent terminal termination device; and a tracking area identifier list allocation module 304. In a case that the terminal belongs to a device initiated only by the terminal or an infrequent terminal termination device, all the tracking areas subordinate to the mobility management entity are included in the tracking area identifier list, and the tracking area identification list is allocated to the terminal. The terminal causes the terminal to initiate the tracking area update process only when it crosses the mobility management entity.

终端类型判断模块根据终端的签约数据判断终端是否属于仅由终端发起通信的设备或不频繁的终端终止设备。 The terminal type judging module judges whether the terminal belongs to a device that only initiates communication by the terminal or an infrequent terminal terminates the device according to the subscription data of the terminal.

通过扩展跟踪区标识列表中的元素数量的表示范围来增加跟踪区标识列表所能包括的跟踪区数量。跟踪区标识列表分配模块扩展跟踪区标识列表中的元素数量的最高位来增加跟踪区标识列表所能包括的跟踪区数量。跟踪区标识列表可以通过进一步增加跟踪区标识列表的数量，来增加分配给终端的总的跟踪区数量。 Increase the number of tracking areas that can be included in the tracking area identification list by extending the representation range of the number of elements in the tracking area identification list. The tracking area identification list allocation module extends the highest bit of the number of elements in the tracking area identification list to increase the number of tracking areas that can be included in the tracking area identification list. The tracking area identification list can increase the total number of tracking areas allocated to the terminal by further increasing the number of tracking area identification lists.

所包含跟踪区标识包括：移动国家码、移动网络码、和跟踪区码。在所包含跟踪区标识在同一个公共陆地移动网并且编码不连续时，所包含的跟踪区标识具有相同的移动国家码和移动网络码，跟踪区标识列表采用压缩编码格式。在跟踪区标识在同一个公共陆地移动网并且编码连续时，移动国家码和移动网络码相同，跟踪区标识列表采用压縮编码格式并且仅标识第一个艮踪区的艮踪区码标识。 The included tracking area identifiers include: a mobile country code, a mobile network code, and a tracking area code. When the included tracking area is identified on the same public land mobile network and the coding is discontinuous, the included tracking area identifier has the same mobile country code and mobile network code, and the tracking area identification list adopts a compression encoding format. When the tracking area is identified on the same public land mobile network and the coding is continuous, the mobile country code is the same as the mobile network code, and the tracking area identification list adopts a compression coding format and identifies only the tracking area code identifier of the first tracking area.

具体地，在实际部署时， ΤΑ的分配在一定地域内是连续的，也即相邻 ΤΑ的 ΤΑΙ在多数情况下应当是连续编码，因此，对这些连续的 ΤΑ使用 Type of list=001类型的编码方式，可以用较小的存储单元表示较多的 TA。此外，属于同一个 MME的 TA其 PLMN ID (也即 MCC+MNC )都相同，即使 TAC 编码不连续，使用 type of list=000类型的 Partial TAI 列表也可以在一定程度上压缩编码。 Specifically, in actual deployment, the allocation of ΤΑ is continuous within a certain area, that is, the ΤΑΙ of adjacent 应当 should be continuously coded in most cases, and therefore, the type of list=001 is used for these consecutive ΤΑ In the encoding mode, more TAs can be represented by smaller memory cells. In addition, the TAs belonging to the same MME have the same PLMN ID (that is, MCC+MNC). Even if the TAC encoding is not continuous, the Partial TAI list of type type list=000 can be compressed to a certain extent.

根据 TS23.003 , 跟踪区标识的编码格式为： TAI=MCC+MNC+TAC。其中， MCC是移动国家码（Mobile Country Code ), 由三位十进制数字表示； MNC是移动网络码（ Mobile Network Code ), 由两位或三位十进制数字表示； MCC和 MNC共同表示 PLMN标识。 TAC是跟踪区码（ Tracking Area Code ), 由 4位十进制数字表示， TAC在同一个 PLMN下唯一。 According to TS23.003, the encoding format of the tracking area identifier is: TAI=MCC+MNC+TAC. The MCC is a Mobile Country Code, represented by three decimal digits; the MNC is a Mobile Network Code, represented by two or three decimal digits; the MCC and the MNC together represent the PLMN identity. The TAC is the Tracking Area Code, which is represented by a 4-digit decimal number, and the TAC is unique under the same PLMN.

TS24.301规定了 TAI 列表信息单元的具体类型与编码格式。 TAI 列表大小最小为 8字节，最多为 98字节。 TAI 列表由一个或多个部分 TAI 列表（ Partial TAI List ) 组成，每个部分 TAI 列表中包含一个或多个 TA，但所有 Partial TAI 列表中包含的 TA的总和不能超过 16个。根据所包含的 TAI 是否在同一个公共陆地移动网（Public Land Mobile Network, 简称 PLMN ) 内，以及编码是否连续，部分 TAI列表分为三种类型： TS 24.301 specifies the specific type and encoding format of the TAI list information unit. The TAI list has a minimum size of 8 bytes and a maximum of 98 bytes. The TAI list consists of one or more partial TAI Lists. Each partial TAI list contains one or more TAs, but the total number of TAs contained in all Partial TAI lists cannot exceed 16. According to whether the included TAI is in the same Public Land Mobile Network (PLMN) and whether the coding is continuous, some TAI lists are divided into three types:

-所包含 TAI在同一个 PLMN ,但是编码不连续，这种类型的部分 TAI 列表其 Type of list=000; - The included TAI is in the same PLMN, but the encoding is not continuous. The partial TAI of this type lists its Type of list=000;

-所包含 TAI在同一个 PLMN，但是编码连续，这种类型的部分 TAI列表其 Type of list=001 ; - The TAIs contained are in the same PLMN, but the encoding is continuous. Part of the TAI of this type lists its Type of list=001;

-所包含 TAI不在同一个 PLMN内，这种类型的部分 TAI列表其 Type of list=010。 - The included TAI is not in the same PLMN. The partial TAI of this type lists its Type of list=010.

Type of list=000类型的部分 TAI列表，由于所包含的 TAI属于同一个 PLMN，也即所有 TAI的移动国家码（ Mobile Country Code，简称 MCC ) 和移动网络码（ Mobile Network Code , 筒称 MNC )相同，因此可以采取一种压縮的编码格式，如下表所示： A partial TAI list of type of list=000, because the included TAI belongs to the same PLMN, that is, the mobile country code (MCC) and the mobile network code (Mobile Network Code) of all TAIs. Same, so you can take one A compressed encoding format, as shown in the following table:

部分跟踪区标识列表 - type of list = "000' Partial tracking area identification list - type of list = "000'

8 7 6 5 4 3 2 1 8 7 6 5 4 3 2 1

0 Type of list Number of elements octet 1 0 Type of list Number of elements octet 1

Spar Spar

e e

MCC digit 2 MCC digit 1 octet 2 MCC digit 2 MCC digit 1 octet 2

MNC digit 3 MCC digit 3 octet 3MNC digit 3 MCC digit 3 octet 3

MNC digit 2 MNC digit 1 octet 4 MNC digit 2 MNC digit 1 octet 4

TAC 1 octet 5 TAC 1 octet 5

TAC 1 (continued) octet 6 TAC 1 (continued) octet 6

TAC k octet 2k+3 TAC k octet 2k+3

TAC k (continued) octet 2k+4 TAC k (continued) octet 2k+4

Type of list=001类型的 Partial TAI列表，由于所包含 TAI属于同一个 PLMN且编码连续，也即所有 TAI的 MCC和 MNC相同，且 TAC连续，因此可以采取一种更有效的编码格式，如下表所示： Type of list=001 type Partial TAI list, because the included TAI belongs to the same PLMN and the coding is continuous, that is, the MCC and MNC of all TAIs are the same, and the TAC is continuous, so a more efficient coding format can be adopted, as shown in the following table. Shown as follows:

部分跟踪区标识列表- type of list = "001" Partial tracking area identification list - type of list = "001"

8 7 6 5 4 3 2 1 8 7 6 5 4 3 2 1

0 Type of Number of elements octet 1 0 Type of Number of elements octet 1

Spar list=001 Spar list=001

e e

MCC digit 2 MCC digit 1 octet 2 MCC digit 2 MCC digit 1 octet 2

MNC digit 3 MCC digit 3 octet 3MNC digit 3 MCC digit 3 octet 3

MNC digit 2 MNC digit 1 octet 4 MNC digit 2 MNC digit 1 octet 4

TAC 1 octet 5 TAC 1 octet 5

TAC 1 (continued) octet 6 TAC 1 (continued) octet 6

在以上两个表中， Number of elements (元素数量）表示该部分 TAI 列表包含的 TA数量，目前协议 24.301规定， Number of elements最大为 16 ( 01111 ), 如果其最高位被置为 1 , 则不管后四位的具体取值，终端也将 Number of elements当作 16处理。对于 type of list=000的部分 TAI 列表， TAC k表示第 k个 TAI的 TAC;对于 type of list=001的部分 TAI 列表 , TAC 1 表示这些连续 TA中第一个 TA的 TAC , 由于所包含的 TA都是连续编码，因此可以用第一个 TA的 TAI与 TA数量得出每个 TA的 TAI。目前协议规定， TAI列表中包含的 TA数量不能超过 16个。如果 MME 所管理的 TA数量超过 16个，没有披露如何将所有 TA都分配给终端。在实际部署时， TA的分配在一定地域内多是连续的 , 因此可以借助并扩展现有的编码方式，用较小的存储单元表示较多的 TA。本发明的实施例提出以下方法： In the above two tables, Number of elements indicates the number of TAs contained in the partial TAI list. Currently, the 24.231 specification, Number of elements is 16 (01111), and if its highest bit is set to 1, no matter The specific value of the last four digits, the terminal also treats Number of elements as 16 processing. For a partial TAI list of type of list=000, TAC k represents the TAC of the kth TAI; for a partial TAI list of type of list=001, TAC 1 represents the TAC of the first TA of these consecutive TAs, due to the inclusion The TAs are all continuously encoded, so the TAI of each TA can be derived from the number of TAIs and TAs of the first TA. According to the current agreement, the number of TAs included in the TAI list cannot exceed 16. If the number of TAs managed by the MME exceeds 16, there is no disclosure of how to assign all TAs to the terminal. In actual deployment, the allocation of TAs is continuous in a certain area, so the existing coding mode can be extended and extended, and more TAs are represented by smaller storage units. Embodiments of the present invention propose the following methods:

跟踪区标识列表分配模块 304扩展 Number of elements使得可以最多表示 32个 TA, 并且整个 TAI 列表所含 TA的数量可以超过 16个。 The tracking area identification list assigning module 304 extends the Number of elements so that up to 32 TAs can be represented, and the total number of TAs in the TAI list can exceed 16.

对于 MME下属所有 TA都连续的情况，釆用 001类型的部分 TAI 列表。通过扩展 Number of Elements , 每个部分 TAI 列表可以表示 32个 TA 而只占用 6个字节。如果 MME下属 TA数小于 32 , TAI 列表中包含一个部分 TAI 列表即可；如果 MME下属 TA数多于 32个，可以增加部分 TAI 列表的数量。在 TAI 列表最多不超过 98个字节的约束下，整个 TAI 列表最多可以包含 16个部分 TAI 列表，每个最多包含 32个 TA。 For all cases where all MME subordinates are contiguous, use a partial TAI list of type 001. By extending Number of Elements, each partial TAI list can represent 32 TAs and occupy only 6 bytes. If the number of TAs of the MME is less than 32, the TAI list may include a partial TAI list; if the number of TAs of the MME is more than 32, the number of partial TAI lists may be increased. Under the constraint that the TAI list can be up to 98 bytes, the entire TAI list can contain up to 16 partial TAI lists, each containing up to 32 TAs.

对于 TA不全连续的情况，可以釆用 000类型的部分 TAI列表，或者同时釆用 000和 001类型的部分 TAI列表。对于 000类型的部分 TAI列表， Number of Elements扩展后最多占用 68字节。如果 MME下属 TA个数多于 32，可以增加部分 TAI 列表数量。 For cases where the TA is not completely continuous, you can use a partial TAI list of type 000, or use a partial TAI list of type 000 and 001 at the same time. For a partial TAI list of type 000, Number of Elements extends up to 68 bytes. If the number of TAs in the MME is more than 32, you can increase the number of partial TAI lists.

如果通过上述方法分配的 TAI列表超过了 98字节，并且仍然存在没有包含的 TA，跟踪区标识列表分配模块 304可以为终端分配一个或多个 TAI 列表，来增加跟踪区标识列表所能包括的跟踪区数量，具体分配方法如上所述。也可以直接增加一个或多个跟踪区列表。 If the TAI list allocated by the above method exceeds 98 bytes, and there is still no TA included, the tracking area identifier list assigning module 304 may allocate one or more TAI lists to the terminal to increase the tracking area identifier list. The number of tracking areas, the specific allocation method is as described above. You can also add one or more tracking area lists directly.

按照以上方法， MME进行 TAI 列表分配的过程如下： According to the above method, the MME performs the TAI list allocation process as follows:

当终端进行 Attach时， MME根据终端的签约数据判定该终端属于仅由终端发起通信的设备或不频繁的终端终止设备。 When the terminal performs the attach, the MME determines, according to the subscription data of the terminal, that the terminal belongs to a device that initiates communication only by the terminal or an infrequent terminal terminates the device.

对上述两种设备， MME将下属所有 TA都包含在 TAI 列表中，在 Attach accept (附着接受）中分配给终端。 For both devices, the MME includes all of the subordinate TAs in the TAI list and assigns them to the terminal in Attach accept.

如果设备移动导致 MME改变，发生 TAU，则新的 MME获得终端的上下文之后检查终端特性是否是仅由终端发起通信的或不频繁的终端终止的，如果是，也将其所有 TA都包含在 TAI 列表中分配给终端。当终端与 MME有信令连接时 MME可以发起全球唯一临时标识重分配过程，同时在该过程中根据分配方法给终端重新分配跟踪区标识列表。 If the device moves to cause the MME to change, and a TAU occurs, the new MME obtains the context of the terminal and checks whether the terminal characteristics are terminated only by the terminal initiated communication or infrequent terminal, and if so, all TAs are also included in the TAI. Assigned to the terminal in the list. When the terminal has a signaling connection with the MME, the MME may initiate a global unique temporary identity re-allocation process, and at the same time, re-allocate the tracking area identifier list to the terminal according to the allocation method.

实例一： Example 1:

一种用于水位线监测的 MO设备，固定分布于河流沿岸，当水位超过预设值时上报数据，设备不接受下行数据。 MME有 20个连续的 TA，当设备附着到网络时， MME将这 20个 TA都分配给该设备，采用 type of list=001 的编码方式， TAI 列表中包含一个部分 TAI列表，其中包含 20个连续 TA。设备在这 20个 TA内移动时（同时也是这个 MME的范围），不会发生 TAU; 只有当设备超出这个范围时，才会做 TAIL A MO device for water level line monitoring is fixedly distributed along the river. When the water level exceeds the preset value, the data is reported, and the device does not accept the downlink data. The MME has 20 consecutive TAs. When the device is attached to the network, the MME allocates the 20 TAs to the device, and uses the encoding method of type of list=001. The TAI list contains a partial TAI list, including 20 Continuous TA. When the device moves within these 20 TAs (also the scope of this MME), TAU will not occur; TAIL will only be done when the device is outside this range.

实例二： Example 2:

一种用于动物监测的 MO设备，安装在动物保护区内的珍稀动物身上，定期上报动物的相关信息。 MME有两个分段连续的 TA段，分别包含 8个和 10个 TA，以及 20个不连续的 TA。两个连续的 TA段分别使用 001方式的部分 TAI 列表，共占用 6*2=12个字节；不连续的 TA使用 000方式的部分 TAI 列表，共占用 20*2+4=44字节。整个 TAI列表长度为 12+44+2=58 个字节。同理，设备在这些 TA内移动时（同时也是这个 MME的范围），不会发生 TAU; 只有当设备超出这个范围时，才会做 TAU。 An MO device for animal monitoring, installed on rare animals in animal protection areas, and regularly reporting information about animals. The MME has two consecutive TA segments, each containing 8 and 10 TAs, and 20 discontinuous TAs. Two consecutive TA segments use a partial TAI list of 001 mode, occupying 6*2=12 bytes; a discontinuous TA uses a partial TAI list of 000 modes, occupying 20*2+4=44 bytes. The entire TAI list is 12+44+2=58 bytes long. Similarly, when the device moves within these TAs (also the scope of this MME), TAU does not occur; TAU is only done when the device is outside this range.

综上，借助本发明上述至少一个技术方案，通过为不经常有下行数据甚至没有下行数据的设备分配足够大的 TAI 列表，可以减少其 TAU的频率。釆用这种分配方法，可以优化移动性管理的性能，并且 MME 总是知道终端的位置，可以通过寻呼建立与设备的连接。 In summary, with the above at least one technical solution of the present invention, the frequency of the TAU can be reduced by allocating a sufficiently large TAI list for devices that do not often have downlink data or even downlink data. With this allocation method, the performance of mobility management can be optimized, and the MME always knows the location of the terminal, and can establish a connection with the device through paging.

以上所述仅为本发明的优选实施例而已，并不用于限制本发明，对于本领域的技术人员来说，本发明可以有各种更改和变化。凡在本发明的精神和原则之内，所作的任何修改、等同替换、改进等，均应包含在本发明的保护范围之内。 The above is only the preferred embodiment of the present invention, and is not intended to limit the present invention, and various modifications and changes can be made to the present invention. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and scope of the present invention are intended to be included within the scope of the present invention.

Claims

权利要求书 Claim

1、一种跟踪区标识列表的分配方法，其特征在于，包括： A method for allocating a tracking area identifier list, comprising:

移动性管理实体判断终端是否属于仅由终端发起通信的设备或不频繁的终端终止设备；以及 The mobility management entity determines whether the terminal belongs to a device that initiates communication only by the terminal or an infrequent terminal termination device;

如果所述终端属于仅由终端发起的设备或不频繁的终端终止设备，则所述移动性管理实体将下属所有跟踪区都包括在跟踪区标识列表中并将所述跟踪区标识列表分配给所述终端，使得所述终端仅在跨移动性管理实体时才发起跟踪区更新过程。 If the terminal belongs to a device initiated only by the terminal or an infrequent terminal termination device, the mobility management entity includes all the tracking areas of the subordinate in the tracking area identification list and assigns the tracking area identification list to the The terminal is such that the terminal initiates the tracking area update process only when it crosses the mobility management entity.

2、根据权利要求 1所述的方法，其特征在于，所述移动性管理实体根据所述终端的签约数据判断所述终端是否属于仅由终端发起的设备或不频繁的终端终止设备。 The method according to claim 1, wherein the mobility management entity determines, according to the subscription data of the terminal, whether the terminal belongs to a device initiated only by the terminal or a terminal device that is not frequently used.

3、根据权利要求 1所述的方法，其特征在于，当所述终端进行附着时，执行所述分配方法。 3. The method according to claim 1, wherein the allocation method is performed when the terminal performs attachment.

4、根据权利要求 1所述的方法，其特征在于，在全球唯一临时标识重分配过程中，执行所述分配方法。 4. The method of claim 1 wherein the allocating method is performed during a globally unique temporary identification redistribution process.

5、根据权利要求 1所述的方法，其特征在于，在位置更新过程中，执行所述分配方法。 5. The method according to claim 1, wherein the allocation method is performed during a location update process.

6、根据权利要求 5所述的方法，其特征在于，如果所述终端移动导致移动性管理实体改变，则进行跟踪区更新过程，新的移动性管理实体获得所述终端的相关信息之后，根据所述分配方法给所述终端重新分配跟踪区标识列表。 The method according to claim 5, wherein if the mobility of the terminal causes the mobility management entity to change, performing a tracking area update process, after the new mobility management entity obtains related information of the terminal, according to The allocation method reassigns the tracking area identification list to the terminal.

7、根据权利要求 1所述的方法，其特征在于，所述跟踪区标识列表包括一个或多个部分跟踪区标识列表，所述部分跟踪区标识列表包括一个或多个艮踪区。 7. The method according to claim 1, wherein the tracking area identification list comprises one or more partial tracking area identification lists, and the partial tracking area identification list comprises one or more tracking areas.

8、根据权利要求 7所述的方法，其特征在于，通过扩展所述跟踪区标识列表中的元素数量的表示范围来增加所述跟踪区标识列表所能包括的跟踪区数量。 8. The method according to claim 7, wherein the number of tracking areas that can be included in the tracking area identification list is increased by expanding a representation range of the number of elements in the tracking area identification list.

9、根据权利要求 7所述的方法，其特征在于，扩展所述跟踪区标识列表中的元素数量的最高位，来扩展跟踪区表示列表中的元素数量的表示范围。 9. The method of claim 7, wherein the highest bit of the number of elements in the list of tracking area identification lists is extended to extend the table representation of the number of elements in the tracking area representation list.

10、根据权利要求 7 所述的方法，其特征在于，通过增加所述跟踪区标识列表的数量，来增加分配给所述终端的跟踪区数量。 10. The method according to claim 7, wherein the number of tracking areas allocated to the terminal is increased by increasing the number of tracking area identification lists.

11、一种跟踪区标识列表的分配装置，其特征在于，包括： 11. A device for distributing a tracking area identifier list, comprising:

终端类型判断模块，用于判断终端是否属于仅由终端发起通信的设备或不频繁的终端终止设备；以及 a terminal type judging module, configured to determine whether the terminal belongs to a device that initiates communication only by the terminal or terminates the device infrequently; and

跟踪区标识列表分配模块，用于在所述终端属于仅由终端发起的设备或不频繁的终端终止设备的情况下，将移动性管理实体下属的所有跟踪区都包括在跟踪区标识列表中并将所述跟踪区标识列表分配给所述终端，使得所述终端仅在跨移动性管理实体时才发起跟踪区更新过程。 a tracking area identifier list allocation module, configured to include all tracking areas subordinate to the mobility management entity in the tracking area identifier list if the terminal belongs to a device initiated only by the terminal or an infrequent terminal termination device The tracking area identification list is assigned to the terminal such that the terminal initiates a tracking area update procedure only when it crosses the mobility management entity.

12、根据权利要求 11所述的装置，其特征在于，所述终端类型判断模块根据所述终端的签约数据判断所述终端是否属于仅由终端发起通信的设备或不频繁的终端终止设备。 The device according to claim 11, wherein the terminal type determining module determines, according to the subscription data of the terminal, whether the terminal belongs to a device that initiates communication only by the terminal or an infrequent terminal termination device.

13、根据权利要求 11所述的装置，其特征在于，所述跟踪区标识列表包括一个或多个部分跟踪区标识列表，所述部分跟踪区标识列表包括一个或多个跟踪区。 13. The apparatus according to claim 11, wherein the tracking area identification list comprises one or more partial tracking area identification lists, and the partial tracking area identification list comprises one or more tracking areas.

14、根据权利要求 13所述的装置，其特征在于，所述跟踪区标识列表分配模块通过扩展所述跟踪区标识列表中的元素数量的表示范围来增加所述跟踪区标识列表所能包括的跟踪区数量。 The apparatus according to claim 13, wherein the tracking area identification list allocation module increases the range of the tracking area identification list by expanding the representation range of the number of elements in the tracking area identification list. The number of tracking areas.

15、根据权利要求 13所述的装置，其特征在于，所述跟踪区标识列表分配模块通过扩展所述跟踪区标识列表中的元素数量的最高位，来增加所述跟踪区标识列表所能包括的跟踪区数量。 The device according to claim 13, wherein the tracking area identification list allocation module increases the tracking area identification list by expanding the highest bit of the number of elements in the tracking area identification list. The number of tracking areas.

16、根据权利要求 13所述的装置，其特征在于，所述跟踪区标识列表分配模块进一步通过增加所述跟踪区标识列表的数量，来增加分配给终端的跟踪区数量。 The apparatus according to claim 13, wherein the tracking area identification list assigning module further increases the number of tracking areas allocated to the terminal by increasing the number of the tracking area identification list.