CN101207923B - Handover method in a mobile communication system and system - Google Patents

Handover method in a mobile communication system and system Download PDF

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CN101207923B
CN101207923B CN 200710141450 CN200710141450A CN101207923B CN 101207923 B CN101207923 B CN 101207923B CN 200710141450 CN200710141450 CN 200710141450 CN 200710141450 A CN200710141450 A CN 200710141450A CN 101207923 B CN101207923 B CN 101207923B
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base station
access
handover
mobile terminal
target base
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CN 200710141450
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CN101207923A (en
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杜忠达
王继承
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中兴通讯股份有限公司
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Abstract

本发明涉及一种移动通信系统的切换方法,包括:通过源基站确定一目标基站,并且向所述目标基站发送切换请求;所述目标基站为所述移动终端在最大传输时延下的接入时机和最小传输时延下的接入时机之间分配多个接入时机,并为每个所述接入时机分配对应的无线资源;所述目标基站通过所述源基站向所述移动终端发送所述接入时机以及对应的无线资源的信息;所述移动终端收到所述切换命令后,根据接收到切换命令的时刻在所述多个接入时机中选择最先到达的接入时机,并利用所述对应的无线资源与所述目标基站建立连接。 The present invention relates to a handover method in a mobile communication system, comprising: determining a target base station by the source base station, and transmits a handover request to the target base station; the target base station to the mobile terminal access at a maximum transmission delay partitioned between access timing in the timing and access timing of a plurality of minimum transmission delay, and allocates a radio resource corresponding to each of said access timing; the target base station transmits to the mobile terminal by the source base station the timing and access information of the wireless resources corresponding to; the mobile terminal after receiving the handover command, selecting an access timing arrives first in time in the plurality of access based on the time of the handover command is received, and using the corresponding radio resources to establish a connection to the target base station.

Description

一种移动通信系统的切换方法及系统 Handover method in a mobile communication system and system

技术领域 FIELD

[0001] 本发明涉及分布式蜂窝无线通讯系统领域,特别是涉及一种移动通信系统的切换方法及系统。 [0001] The present invention relates to the field of distributed cellular radio communication system, and more particularly to a method and a system for switching the mobile communication system.

背景技术 Background technique

[0002] 分布式蜂窝无线通讯系统的结构图请参见图1,主要有移动终端101,基站102和核心网103组成。 [0002] The configuration diagram of a distributed cellular radio communication system Referring to Figure 1, there are mobile terminal 101, base station 102 and core network 103 components. 基站之间根据需要可以有逻辑或者物理的连接,基站组成的网络称为无线接入网(RAN),负责接入层事务,比如无线资源的管理;上下行的无线资源按照共享信道的方式由基站负责调度。 The base station according to need between the network may have logical or physical connections of base stations is called a radio access network (the RAN), is responsible for access layer transactions such as radio resource management; uplink radio resources shared channel according to the manner The base station is responsible for scheduling. 每个基站可以和一个或者一个以上的核心网节点(CN)连接。 Each base station can be one or more than one core network node (CN) is connected. 核心网负责非接入层事务,比如移动性管理等。 The core network is responsible for non-access layer transactions, such as mobility management. 移动终端是指可以和网络通讯的设备,比如手机或者笔记本电脑等。 The mobile terminal is one that can network and communications devices, such as mobile phones or laptop computers. 每个移动终端在上行方向上只能连接到网络中的其中一个基站。 Each mobile terminal only in the upstream direction is connected to one of the base stations in the network.

[0003] 现有的基站间的切换流程图请参见图2。 [0003] switching between a flow diagram of a conventional base station See Figure 2.

[0004] 步骤201 :移动终端发送测量报告给源基站。 [0004] Step 201: The mobile terminal sends a measurement report to the source base station.

[0005] 步骤202 :源基站根据测量报告和切换控制策略判断需要切换,并且选定切换的目标基站。 [0005] Step 202: the source base station determines the control strategy according to the measurement report and handover need to switch, and the selected handover target base station.

[0006] 步骤203 :源基站发送切换请求给目标基站,消息中包含必要的通讯上下文。 [0006] Step 203: The source base station sends a handover request to the target base station, the message context contains the necessary communications.

[0007] 步骤204 :目标基站在判断允许切换以后,为移动终端分配无线资源,并且确定移动终端接入本基站的接入时机。 [0007] Step 204: determining the target base station after handover allowed, radio resources are allocated for the mobile terminal, and the access terminal determines the access timing of the mobile-station.

[0008] 步骤205 :目标基站发送切换请求确认给源基站,消息中包括目标基站为移动终端分配的无线资源和接入时机。 [0008] Step 205: The target base station sends a handover request acknowledgment to the source base station, a radio resource message including the target base station and an access time allocated to the mobile terminal.

[0009] 步骤206 :源基站发送切换命令给移动终端,消息中包括目标基站为移动终端分配的无线资源和接入时机。 [0009] Step 206: The source base station sends a handover command to the mobile terminal, the message comprising radio resources and access to the target base station timing assigned to the mobile terminal. 该接入时机是在移动终端收到该切换命令的时刻之后,延迟了一段时间,所确定的接入时刻。 After this time the access time of the handover command is received in a mobile terminal, delaying for a period of time, the determined access time. 所述延迟的一段时间,用以由移动终端处理切换命令,并对软硬件进行准备,以便移动终端顺利接入新的基站。 The delay period of time for a handover command by the mobile terminal, and the software and hardware ready to move smoothly access a new base station terminal.

[0010] 步骤207 :移动终端在目标基站确定的接入时机执行切换。 [0010] Step 207: the access timing of the mobile terminal to perform a handover target base station determined.

[0011] 步骤208 :移动终端在目标基站分配的无线资源上给目标基站发送切换接入消肩、ο [0011] Step 208: the mobile terminal transmitting on the wireless resource allocated in the target base station to the target base station handover access elimination shoulder, ο

[0012] 步骤209 :目标基站给移动终端发送切换接入确认消息。 [0012] Step 209: the target base station to the mobile terminal sends the handover access message acknowledgment.

[0013] 步骤210 :移动终端发送切换完成消息给目标基站,切换流程结束。 [0013] Step 210: The mobile terminal sends a handover complete message to the target base station, the handover procedure ends.

[0014] 如果通信网络各节点之间是不同步的,即终端不知自己与目标基站或小区的同步信息,步骤208和209用于终端获取与目标基站或小区的同步。 [0014] If the communication network between the nodes are not synchronous, i.e., the terminal do not know their own synchronization information of the target base station or cell, steps 208 and 209 for the target terminal obtains synchronization with the base station or cell. 如果目标基站或小区给终端分配的无线资源和接入时机只是用于终端发送资源调度请求,则步骤208中切换接入消息还要向目标基站或小区发送资源调度请求,目标基站或小区在步骤209中为终端分配发送切换完成消息的资源。 If the target base station or cell to radio resources assigned to the terminal and the access time for the terminal transmits only a resource scheduling request, handover access message in step 208 also transmits resource scheduling request to the target base station or cell, the target base station or cell in step resource 209 sends a handover complete message is allocated to the terminal. 如果通信网络各节点之间是同步的,并且目标基站或小区给终端分配的无线资源和接入时机可以直接用于发送切换完成消息,则切换接入过程208和209 可以省略。 If the synchronization between nodes is a communication network, and the wireless resources and the access timing of the target base station or cell to be directly assigned to the terminal for transmitting a handover complete message, the handover access process 208 and 209 may be omitted. [0015] 切换也可以发生在同一个基站的不同小区之间。 [0015] The switching may also occur between different cells in the same base station. 基站内不同小区间的切换与基站间的不同小区的切换在空中接口上流程相同,只是不存在基站间的传输和接口,上述基站间切换流程中有关基站之间的信息交互过程可以在基站内部模块之间完成。 Handover between different cells of the base station and the handover between base stations of different cells within the same process on the air interface, but the interface between the base stations and the transmission does not exist, the inter-base station handover process information about the interaction between the base station may be internal to the base station completed between modules.

[0016] 在步骤204中,目标基站需要为移动终端接入本基站确定一个接入时机,在该接入时机移动终端开始在目标基站为移动终端分配的无线资源上发送切换接入消息;而目标基站也会在相同的无线资源上接受移动终端的切换接入消息。 [0016] In step 204, the target base station to the mobile terminal needs to access the base station determines an access time to the present, sends a handover access message on the access time to the mobile terminal starts the target base station the mobile terminal is allocated radio resources; and the target base station will accept handover access message from the mobile terminals in the same radio resources. 在步骤204中还为移动终端分配了无线资源,这个无线资源只用于移动终端发送一个接入脉冲,所以该无线资源在时域维持时间很短,比如一个子帧的长度。 In step 204 also allocates a radio resource for the mobile terminal, the radio resource is used only for a mobile terminal transmitting the access burst, so the radio resource is maintained for a short time in the time domain, such as a length of the sub-frame. 接入时机的确定需要考虑目标基站发送切换请求确认消息给源基站的传输时延和源基站发送切换命令消息给移动终端的传输时延等因素。 The access timing is determined to consider the target base station sends a handover request acknowledgment message to the source base station and the transmission delay of the source base station a handover command message to the other mobile terminal transmission delay factors.

[0017] 请参阅图3,为现有技术中接入时机的示意图。 [0017] Please refer to FIG. 3, a schematic diagram of the access timing to the prior art. Tl是步骤204中目标基站为移动终端分配无线资源和确定接入时机的时刻。 Tl is a step of allocating radio resources in the target base station and the access timing is determined for the mobile terminal 204 in time. 移动终端实际可能收到切换命令消息的时间在移动终端收到切换命令的最早时刻T2和移动终端收到切换命令的最晚时刻T3之间。 The actual time the mobile terminal may receive the handover command message at the earliest time T2 and the mobile terminal receives a handover command between the time T3 at the latest in a mobile terminal a handover command is received.

[0018] 在实际的网络运营中,步骤205和步骤206的传递过程总是有延迟的情况出现,即使是同一个基站内小区间切换,空中传输也存在延迟。 [0018] In actual network operations, steps 205 and 206 of the transfer process is always a delay occurs, even if the inter-cell handover within the same base station, there is a delay-air transmission. 而为了保证移动终端尽可能成功接入到目标基站,一般来说有两种措施:第一种措施,请参阅图4所示,把接入时机设置在T3 以后,同时目标基站只要分配最小的无线资源。 In order to ensure the success of the mobile terminal as an access to the target base station, there are two general steps: first measure, see FIG. 4, the access time is provided after T3, the target base station at the same time as long as the minimum allocation radio resources. 第二种措施请参阅图5,考虑最小延迟,把接入时机设置在最早时刻T2以后,同时目标基站在分配的无线资源在时域上覆盖了T2和T3 之间的延迟差。 Please refer to FIG. 5 second measure, consider the minimum delay, the access time is provided after the earliest time T2, the target base station while the radio resources allocated to cover the delay difference between T2 and T3 in the time domain.

[0019] 第一种措施的问题是无论步骤205和步骤206中的消息传递延迟在实际情况如何,移动终端开始切入到目标基站的时间总是最迟,这样就人为地延迟了很大部分移动终端的切换过程,优点是分配的无线资源最少。 Problems [0019] The first measure is the message passing steps 205 and 206 whether the delay in the actual situation, the mobile terminal starts to cut the target base station is always the latest time, so that much of artificially delaying the movement terminal of the handover process, the least advantage is that the radio resource allocation. 第二种措施的问题是,冗余的无线资源取决于延迟的变化范围。 The second problem is that measures redundant radio resources depending on the delay variations. 比如延迟的变化范围有18ms,那么目标基站必须配置多余的18ms的无线资源,从资源利用率来说,是很不合算的,优点是移动终端总是以最快的速度切入。 For example there is 18ms delay variation range, then the target base station must be configured 18ms excess radio resources from resource utilization, it is very uneconomical, the advantage of the mobile terminal always cut the fastest.

[0020] 一般来说包含信令消息的数据包在地面和无线接口发送的优先级都会比较高,所以只有在地面资源和无线资源发生拥塞的情况下,上述图3中T2和T3之间的范围才会变大。 Data [0020] General packet containing signaling messages will be relatively high priority and a terrestrial radio interface, it is only between the case where congestion occurs in the terrestrial resources and radio resources in FIG. 3, T2 and T3 of range will be larger. 而在网络运营的过程中,网络资源发生拥塞的情况是比较少见的,比如可能会出现在系统忙碌的时段。 In the process of network operations, the network resource congestion occurs is relatively rare, such as may occur in the system busy period. 系统如果根据网络是否拥塞来改变无线接口资源分配的策略,显然过于复杂。 If the system is to change the radio interface resource allocation strategies depending on whether the network is congested, apparently too complicated. 而采用上述的两种措施其实都是基于不常出现的最悲观的情形,而且都有各自的缺陷。 The use of the above two measures are in fact based on the most pessimistic scenario infrequent, but have their own flaws.

发明内容 SUMMARY

[0021] 本发明所要解决的技术问题在于,提供一种移动通信系统的切换方法,用于解决现有技术中资源利用率不高的问题。 [0021] The present invention solves the technical problem is to provide a handover method in a mobile communication system, for solving the prior art problem of resource utilization is not high.

[0022] 本发明涉及一种移动通信系统的切换方法,用于移动终端在不同基站间的切换, 包括: [0022] The present invention relates to a handover method in a mobile communication system, a mobile terminal for switching between different base stations, comprising:

[0023] 确定目标基站的步骤,用于通过源基站确定一目标基站,并且向所述目标基站发送切换请求; [0023] The step of determining the target base station, means for determining a target base station via the source base station and transmits a handover request to the target base station;

[0024] 分配资源的步骤,用于所述目标基站为所述移动终端在最大传输时延下的接入时机和最小传输时延下的接入时机之间分配多个接入时机,并为每个所述接入时机分配对应的无线资源;[0025] 切换命令的传输步骤,用于所述目标基站通过所述源基站向所述移动终端发送所述接入时机以及对应的无线资源的信息;切换步骤,用于所述移动终端收到所述切换命令后,根据接收到切换命令的时刻在所述多个接入时机中选择时域上最先到达的接入时机进行切换。 [0024] The step of allocating resources, for the target base station for the mobile terminal is assigned a plurality of access timing between the access time and the access time to the minimum transmission delay at maximum transmission delay, and to each of the access timing corresponding to a radio resource allocation; step of transmitting [0025] handover command for the target base station transmits the timing and access corresponding radio resources to the mobile terminal through the source base station information; switching step, for said mobile terminal after receiving the handover command, switching to the time received handover command selects the access timing of the first to arrive in the time domain of the time according to the plurality of access.

[0026] 所述多个接入时机包括:最小传输时延情况下的接入时机、最大传输时延情况下的接入时机以及正常传输时延情况下的接入时机,所述传输时延是指所述切换命令从所述目标基站到所述移动终端的传输时延。 [0026] The plurality of access time comprising: an access time in the access time to the minimum transmission delay, the access time at the normal maximum transmission delay and transmission delay case where the transmission delay It refers to the handover command from the target base station to the mobile terminal transmission delays.

[0027] 所述无线资源用于发送资源调度请求而不能直接发送切换完成消息,所述切换步骤进一步包括: [0027] the radio resource for transmitting a scheduling request resource can not directly send a handover complete message, the switching step further comprises:

[0028] 所述移动终端利用所述无线资源向所述目标基站发送切换接入消息; [0028] mobile terminal using the radio resources for transmitting the handover access message to the target base station;

[0029] 所述目标基站接收到所述切换接入消息后,释放分配给所述移动终端的没有利用到的无线资源,并向所述移动终端发送切换接入确认消息; After [0029] the target base station receiving the handover access message, releases the assigned not to use the mobile terminal to the radio resource, to the mobile terminal sends the handover access message acknowledgment;

[0030] 所述移动终端向所述目标基站发送切换完成消息。 [0030] The mobile terminal sends a handover complete message to the target base station.

[0031] 所述无线资源可以用于直接发送切换完成消息,所述切换步骤进一步包括: [0031] The radio resource can be used to directly transmit the handover complete message, the switching step further comprises:

[0032] 所述移动终端利用所述无线资源向所述目标基站发送切换完成消息; [0032] mobile terminal using the radio resources for transmitting the handover complete message to the target base station;

[0033] 所述目标基站接收到所述切换完成消息后,释放分配给所述移动终端的没有利用到的无线资源。 [0033] the target base station after receiving the handover complete message, releases allocated to the mobile terminal is not using the radio resource. .

[0034] 所述通过源基站确定一目标基站的步骤进一步包括: [0034] The target base station by determining a source base station step further comprises:

[0035] 所述移动终端向所述源基站发送测量报告; [0035] The mobile terminal transmits a measurement report to the source base station;

[0036] 所述源基站根据所述测量报告以及设定的切换控制策略判断是否需要切换,如果需要,选定切换的目标基站。 [0036] The source base station according to the measurement report and setting a switching control strategy determines whether the handover is required, if desired, the selected handover target base station.

[0037] 对应每个所述接入时机的所述无线资源,在时域上为一个子帧长度。 [0037] corresponding to each of the resources of the radio access timing, in the time domain of a sub-frame length.

[0038] 本发明还涉及一种移动通信系统的切换系统,用于移动终端在不同基站间的切换,其特征在于,包括: [0038] The present invention further relates to a system for switching the mobile communication system, a mobile terminal for switching between different base stations, characterized by comprising:

[0039] 确定目标基站的装置,用于源基站确定一目标基站,并且向所述目标基站发送切换请求; [0039] determining a target base station for source base station determines a target base station, and transmits a handover request to the target base station;

[0040] 分配资源的装置,用于所述目标基站为所述移动终端在最大传输时延下的接入时机和最小传输时延下的接入时机之间分配多个接入时机,并为每个所述接入时机分配对应的无线资源; [0040] resource allocation means for allocating the target base station to the plurality of access timing between the access time and the access time to the minimum transmission delays at the mobile terminal a maximum transmission delay, and to each of the access timing corresponding to a radio resource allocation;

[0041] 切换命令的传输装置,用于所述目标基站通过所述源基站向所述移动终端发送所述接入时机以及对应的无线资源的信息; [0041] The handover command transmission means for transmitting information of the target base station timing and access corresponding radio resources to the mobile terminal by the source base station;

[0042] 切换装置,用于所述移动终端收到所述切换命令后,根据接收到切换命令的时刻在所述多个接入时机中选择时域上最先到达的接入时机,并利用所述对应的无线资源与所述目标基站建立连接; [0042] switching means for the mobile terminal after receiving the handover command, select the access time of arrival in the time domain in the first plurality of access timing according to the timing of receiving the handover command, and using the radio resource corresponding to establish a connection with the target base station;

[0043] 放弃装置,用以在所述移动终端接入后放弃没有使用的无线资源。 [0043] abandon means for giving up radio resources are not used after the mobile access terminal.

[0044] 所述多个接入时机包括:最小传输时延情况下的接入时机、最大传输时延情况下的接入时机以及正常传输时延情况下的接入时机。 [0044] The plurality of access time comprising: an access timing at the minimum transmission delay, the access time at maximum transmission delay as well as an access time in the normal transmission delay conditions.

[0045] 所述放弃装置进一步包括: [0045] The abandonment apparatus further comprising:

[0046] 所述移动终端利用所述无线资源向所述目标基站发送切换接入消息的装置;[0047] 所述目标基站接收到所述切换接入消息后,释放分配给所述移动终端的没有利用到的无线资源,并向所述移动终端发送切换接入确认消息的装置; [0046] the mobile terminal using the radio resource to the target base station sends a handover access message; [0047] the target base station after receiving the handover access message, releases allocated to the mobile terminal no use of the radio resources, and sends a handover acknowledgment message the access means of the mobile terminal;

[0048] 所述移动终端向所述目标基站发送切换完成消息的装置。 [0048] The mobile terminal apparatus transmits to the target base station handover complete message.

[0049] 本发明涉及一种移动通信系统的切换方法,用于移动终端在基站内不同小区间的切换,其特征在于,包括: [0049] The present invention relates to a handover method in a mobile communication system for switching a mobile terminal between base stations of different cells within, characterized in that, comprising:

[0050] 确定目标小区的步骤,用于通过基站确定一目标小区; [0050] The step of determining the target cell, means for determining a target cell via a base station;

[0051] 分配资源的步骤,用于所述基站为所述移动终端在最大传输时延下的接入时机和最小传输时延下的接入时机之间分配多个接入时机,并为每个所述接入时机分配对应的无线资源; [0051] The step of allocating resources for the base station for the mobile terminal is assigned a plurality of access timing between the access time and the access time to the minimum transmission delay at maximum transmission delay, and for each the access time to a corresponding radio resource allocation;

[0052] 切换命令的传输步骤,用于所述基站向所述移动终端发送所述接入时机以及对应的无线资源的信息; [0052] The step of transmitting the handover command, the base station sends to the mobile terminal and the access time information corresponding to a radio resource;

[0053] 切换步骤,用于所述移动终端收到所述切换命令后,根据接收到切换命令的时刻在所述多个接入时机中选择时域上最先到达的接入时机进行切换。 [0053] The switching step, for the mobile terminal after receiving the handover command, switching to the time received handover command selects the access timing of the first to arrive in the time domain of the time according to the plurality of access.

[0054] 所述多个接入时机包括:最小传输时延情况下的接入时机、最大传输时延情况下的接入时机以及正常传输时延情况下的接入时机,所述传输时延是指所述切换命令从目标小区到到所述移动终端的传输时延。 [0054] The plurality of access time comprising: an access time in the access time to the minimum transmission delay, the access time at the normal maximum transmission delay and transmission delay case where the transmission delay It refers to the handover command from the target cell to the transmission delay to the mobile terminal.

[0055] 所述无线资源用于发送资源调度请求而不能直接发送切换完成消息,所述切换步骤进一步包括: [0055] the radio resource for transmitting a scheduling request resource can not directly send a handover complete message, the switching step further comprises:

[0056] 所述移动终端利用所述无线资源向所述目标小区发送切换接入消息; [0056] mobile terminal using the radio resources for transmitting the handover access message to the target cell;

[0057] 所述基站接收到所述切换接入消息后,释放分配给所述移动终端的没有利用到的无线资源,并向所述移动终端发送切换接入确认消息; [0057] The base station after receiving the handover access message, releases allocated to the mobile terminal is not using the radio resource, to the mobile terminal sends the handover access message acknowledgment;

[0058] 所述移动终端向所述目标小区发送切换完成消息。 [0058] The mobile terminal sends a handover complete message to the target cell.

[0059] 所述无线资源可以用于直接发送切换完成消息,所述切换步骤进一步包括: [0059] The radio resource can be used to directly transmit the handover complete message, the switching step further comprises:

[0060] 所述移动终端利用所述无线资源向所述目标小区发送切换完成消息; [0060] mobile terminal using the radio resources for transmitting the handover complete message to the target cell;

[0061] 所述基站接收到所述切换完成消息后,释放分配给所述移动终端的没有利用到的无线资源。 The [0061] base station after receiving the handover complete message, releases allocated to the mobile terminal is not using the radio resource.

[0062] 所述通过基站确定一目标小区的步骤进一步包括: [0062] said determining a target cell through the base station further comprising the step of:

[0063] 所述移动终端向所述基站发送测量报告; [0063] The mobile terminal transmits the measurement report to the base station;

[0064] 所述基站根据所述测量报告以及设定的切换控制策略判断是否需要切换,如果需要,选定切换的目标小区。 The [0064] base station according to the measurement report and setting a switching control strategy determines whether the handover is required, if desired, the selected handover target cell.

[0065] 对应每个所述接入时机的所述无线资源,在时域上为一个子帧长度。 [0065] corresponding to each of the resources of the radio access timing, in the time domain of a sub-frame length.

[0066] 本发明的效果在于,定义多个接入时机有利于节省无线资源,提高接入速度,同时又能够兼顾到延迟比较大的情形。 [0066] The effect of the present invention, a plurality of defined access time helps to save radio resources, to improve access speed, but also able to take into account the case where the delay is relatively large.

附图说明 BRIEF DESCRIPTION

[0067] 图1所示为分布式蜂窝无线通讯系统结构图; [0067] Figure 1 shows a distributed configuration diagram of a cellular wireless communication system;

[0068] 图2所示为现有的基站间切换流程图; [0068] Figure 2 is a flowchart illustrating the conventional inter base station handover;

[0069] 图3所示为无线资源分配时刻和移动终端接收消息时刻示意图; Schematic [0069] FIG. 3 is a timing message received radio resource assignment time and the mobile terminal;

[0070] 图4所示为确定移动终端接入时机的第一种措施的示意图;[0071] 图5所示为确定移动终端接入时机的第二种措施的示意图; [0070] FIG. 4 shows a schematic view of a first measure for determining the access time of mobile terminal; second measure is a schematic view of a mobile terminal to determine the timing of the access [0071] Figure 5;

[0072] 图6所示为本发明确定接入时机的示意图; [0072] FIG. 6 is a schematic diagram of determining the access time to the invention;

[0073] 图7所示为本发明中优化以后基站间切换流程图; [0073] FIG. 7 of the present invention shown after inter base station handover optimization in a flowchart;

[0074] 图8所示为本发明切换系统的结构图。 [0074] The structure shown in FIG switching system of the present invention, FIG.

[0075] 图9所示为本发明中基站间无切换接入过程的切换流程图。 [0075] FIG. 9 shows a flowchart of switching without switching between the access procedure base station of the present invention.

[0076] 图10所示为本发明中基站内切换流程图。 [0076] As shown in FIG. 10 of the present invention within the base station handover in a flowchart.

[0077] 图11所示为本发明中基站内无切换接入过程的切换流程图。 [0077] FIG 11 a flow chart of the present non-handoff access handover procedure in a base station within the invention FIG.

具体实施方式 Detailed ways

[0078] 在本发明中,目标基站为移动终端的接入所分配的接入时机,并不仅包括一个,而是包括多个,且是分配在最大传输时延下的接入时机和最小传输时延下的接入时机之间。 [0078] In the present invention, the access time to a target base station for the access of the mobile terminal allocated and not only one, but comprises a plurality of, and is allocated at maximum transmission delay and minimum propagation time of the access access between the timing of the next delay. 这些接入时机的确定需要参考传输时延,可以包括但并不仅限于以下特殊时机,请参阅图6 所示: Determining the access time of the need to refer to transmission delay, may include, but is not limited to the following special timing, see Figure 6:

[0079] 1)最小传输时延情况下的接入时机,T41 (即假设终端在最早时刻收到切换命令的情况下确定的接入时机);所述传输时延是所述切换指令从所述目标基站到所述移动终端的传输时延或切换指令从目标小区到移动终端的传输时延。 The access time in the [0079] 1) the case of minimum transmission delay, T41 (i.e., assuming the case where the terminal receives the handover command earliest time determined access time); said transmission delay instruction is the switching from the said transmission delay of the base station to the target mobile terminal or the handover command from the target cell to the transmission delay of the mobile terminal.

[0080] 2)正常传输时延情况下的接入时机,T42(即假设终端在最早、最晚之间的时刻, 一般可设定为通常情况下的最可能时刻,收到切换命令的情况下确定的接入时机); [0080] 2) the access time delay of the transmission under normal circumstances, T42 (i.e., the first terminal scenario, the time between the latest, and can be set to the most probable time in the normal case, after receiving the handover command the determined access time);

[0081] 3)最大传输时延情况下的接入时机,Τ43(即假设终端在最晚时刻收到切换命令的情况下确定的接入时机)。 [0081] 3) at the access timing of the maximum transmission delay situation, Τ43 (i.e., assuming the access terminal in the case of the latest time received handover command timing determined).

[0082] 目标基站在所述的多个接入时机时,为移动终端分配无线资源,这些无线资源仅用于移动终端发送切换接入消息。 [0082] The target base station when the access time of the plurality of radio resources are allocated for the mobile terminal, only the radio resources for the mobile terminal sends a handover access message. 移动终端完成接入后,目标基站可以及时释放后续还未使用的无线资源。 After the completion of access to the mobile terminal, the target base station may release radio resources in time subsequent use yet.

[0083] 请参阅图6,假设移动终端收到切换命令的时间为Tr,那么当Tr在T2的时候,移动终端可以从上述的多个接入时机中选择与T2对应的T41作为接入时机,利用对应的无线资源向目标基站发送切换接入消息;如果Tr在T3的时候,移动终端可以从上述的多个接入时机中选择与T3对应的T43作为接入时机,利用对应的无线资源向目标基站发送切换接入消息。 [0083] Referring to FIG. 6, the mobile terminal is assumed that the time of receipt of the handover command Tr, Tr is then when the time T2, the mobile terminal T2 may be selected from the above-described T41 corresponding to the plurality of access time as the access time , radio resources corresponding to the transmitted handover access message to the target base station; if Tr is the time T3, the mobile terminal T3 may be selected from the above-described T43 corresponding to the plurality of access time as the access time, with the corresponding radio resources sends a handover access message to the target base station. 如果Tr在T2和T3之间,那么移动终端可以根据实际情况,在上述的多个接入时机中选择时域上将最先到达的接入时机,即可在iMl、T42和Τ43中选择恰当的时机,利用对应的无线资源向目标基站发送切换接入消息。 If Tr is between T2 and T3, the mobile terminal according to the actual situation, the access time selection field on the first arrival time of said plurality of access, to select the appropriate iMl, T42, and in Τ43 timing using the radio resource corresponding to the target base station sends a handover access message. 与每个接入时机对应的无线资源例如在时域上为一个子帧长度。 Corresponding to each access opportunity, for example, a radio resource in a time domain of a sub-frame length. 当目标基站收到切换接入消息后,如果对该移动终端还分配了备用的无线资源,那么释放这些无线资源。 When the target base station receives the handover access message, if the mobile terminal is also assigned a spare radio resources, then release the radio resource. 本发明的方法同样适用于移动终端在基站内不同小区之间的切换。 The method of the present invention is equally applicable to the handover of the mobile terminal between base stations of different cells.

[0084] 参阅图7,如果基站给移动终端分配的无线资源仅用于同步或发送资源调度请求, 则需要切换接入流程,具体步骤如下 [0084] Referring to Figure 7, the base station if the radio resource allocated to the mobile terminal or is used for synchronous transmission resource scheduling request, handover access process is required, the following steps

[0085] 步骤701 :移动终端发送测量报告给源基站。 [0085] Step 701: The mobile terminal sends a measurement report to the source base station.

[0086] 步骤702 :源基站根据测量报告和切换控制策略判断需要切换,并且选定切换的目标基站。 [0086] Step 702: the source base station determines the control strategy according to the measurement report and handover need to switch, and the selected handover target base station.

[0087] 步骤703 :源基站发送切换请求给目标基站,该切换请求中包含必要的通讯上下文。 [0087] Step 703: source base station sends a handover request to the target base station, the handover request includes the necessary communications context.

[0088] 步骤704 :目标基站在判断允许切换以后,为移动终端接入本基站确定多个接入时机,并对应各个接入时机分配适当的无线资源。 [0088] Step 704: After the handover target base station to allow for access to the mobile terminal a plurality of access base station determines the present time is determined, and assign radio resources corresponding to each access opportunity.

[0089] 步骤705 :目标基站发送切换请求确认给源基站,消息中包括目标基站为移动终端分配的无线资源和多个接入时机的信息。 [0089] Step 705: The target base station sends a handover request acknowledgment to the source base station, the message including information on radio resources and access timing of a plurality of target base stations assigned to the mobile terminal.

[0090] 步骤706 :源基站发送切换命令给移动终端,消息中包括目标基站为移动终端分配的多个接入时机和与之对应的无线资源的信息。 [0090] Step 706: source base station sends a handover command to the mobile terminal, the message comprising a plurality of access time to the target base station and the mobile terminal allocation information of radio resources corresponding thereto.

[0091] 步骤707 :收到切换命令后,移动终端根据当前的实际时间,在多个接入时机中选择时域上将最先到达的接入时机执行切换。 [0091] Step 707: After receiving the handover command, the mobile terminal according to the actual current time, when the plurality of selection field on the access time in the access time to reach the first switching is performed.

[0092] 步骤708 :移动终端在目标基站分配的无线资源上给目标基站发送切换接入消肩、ο [0092] Step 708: the mobile terminal transmitting on the wireless resource allocated in the target base station to the target base station handover access elimination shoulder, ο

[0093] 步骤709 :目标基站在收到切换接入消息以后,如果还存在移动终端没有利用的无线资源,须释放这些无线资源,然后给移动终端发送切换接入确认消息。 [0093] Step 709: the target base station after receiving the handover access message, if there is a radio resource not used by the mobile terminal, shall release the radio resources to the mobile terminal then transmits handover access acknowledgment message.

[0094] 步骤710 :移动终端发送切换完成消息给目标基站,切换流程结束。 [0094] Step 710: The mobile terminal sends a handover complete message to the target base station, the handover procedure ends.

[0095] 采用上述方法,首先可以保证移动终端可以成功接入到目标基站,因为接入时机中包含了移动终端最晚可能切入的机会;其次,系统只预留了相对少的无线资源,因为仅用于切换接入消息的无线资源,在时域上的长度和图5所示现有技术中T2和T3之间的范围相比,要小的多;最后移动终端切入到目标基站的延迟时间,在背景技术所述的措施1和措施2的延迟时间之间,实际的延迟取决于接入时机的多少。 [0095] With the above method, the first mobile terminal may successfully ensure access to the target base station, because the access time to the mobile terminal contains the latest possible opportunity to cut; secondly, the system only a relatively few reserved radio resources, because Finally, the mobile terminal delay to cut the target base station; only for RRC handover access message, a range between the prior art shown in FIG. 5 and a length in the time domain T2 and T3 compared to the much smaller time, between the background art measures and measures a delay time 2, the actual delay depends on the timing of the access number. 比如在本发明实施例中目标基站为移动终端分配有3个接入时机,那么理论上平均的延迟时间是T2和T3时间差的1/6。 In such embodiment the target base station for the mobile terminal allocated Embodiment 3 In the present invention, the access time, then theoretically the average delay time is 1/6 times the difference between T2 and T3.

[0096] 在多数情况下,目标基站发送给移动终端的切换命令消息不会有延迟,所以定义多个接入时机有利于节省无线资源,提高接入速度,同时又能够兼顾到延迟比较大的情形。 [0096] In most cases, the target base station to the handover command message to the mobile terminal will not be delayed, so defining a plurality of access time will help save radio resources, to improve access speed, but also take into account the delay can be relatively large situation.

[0097] 本发明还提供了一种移动通信系统的切换系统,目标基站为移动终端的接入所分配的接入时机,并不仅包括一个,而是包括多个。 [0097] The present invention also provides a switching system for a mobile communication system, the access time to a target base station for the access of the mobile terminal allocated and not only one, but comprises a plurality of. 这些接入时机的确定需要参考传输时延, 可以包括但并不仅限于以下特殊时机,请参阅图6所示: Determining the access time of the need to refer to transmission delay, may include, but is not limited to the following special timing, see Figure 6:

[0098] 1)最小传输时延情况下的接入时机,T41 (即假设终端在最早时刻收到切换命令的情况下确定的接入时机); [0098] 1) the access time to the minimum transmission delay case, T41 (i.e., assuming the access terminal in the case where the timing of the first timing determined by the handover command is received);

[0099] 2)正常传输时延情况下的接入时机,T42(即假设终端在最早、最晚之间的时刻, 一般可设定为通常情况下的最可能时刻,收到切换命令的情况下确定的接入时机); [0099] 2) the access time delay of the transmission under normal circumstances, T42 (i.e., the first terminal scenario, the time between the latest, and can be set to the most probable time in the normal case, after receiving the handover command the determined access time);

[0100] 3)最大传输时延情况下的接入时机,Τ43(即假设终端在最晚时刻收到切换命令的情况下确定的接入时机)。 [0100] 3) at the access timing of the maximum transmission delay situation, Τ43 (i.e., assuming the access terminal in the case of the latest time received handover command timing determined).

[0101] 该切换系统的具体结构如图8所示。 Specific structure [0101] The switching system shown in Fig.

[0102] 移动通信系统中包括移动终端801、源基站802、目标基站803。 [0102] The mobile communication system includes a mobile terminal 801, the source base station 802, target base station 803. 所述移动终端801 中包括一切换装置8011,所述源基站802中包括一确定目标基站的装置8021,所述目标基站803中包括一切换指令的传输装置8032以及一分配无线资源的装置8031、一放弃装置8033。 The mobile terminal 801 comprises a switching means 8011, the source base station 802 includes a target base station determining means 8021, the target base station 803 includes a transmission means 8032, and a radio resource assignment means 8031 ​​of a switching command, 8033 to give up a device.

[0103] 所述确定目标基站的装置8021用于接收移动终端发送的测量报告,根据所述测量报告以及设定的切换控制策略判断需要切换,并且选定切换的目标基站,并向目标基站发送切换请求,该切换请求中包含必要的通讯上下文。 [0103] The determination means 8021 for receiving the target base station a measurement report sent by the mobile terminal, the control strategy is determined to be switched according to the measurement report and a setting switch, and the selected handover target base station, transmits to the target base station the handover request, the handover request includes the necessary communications context. [0104] 目标基站的分配无线资源的装置8031在判断允许切换以后,为移动终端接入本基站确定多个接入时机,并对应各个接入时机分配适当的无线资源。 Radio resource allocation means 8031 ​​[0104] After the handover target base station to allow for access to the mobile terminal a plurality of access base station determines the present time is determined, and assign radio resources corresponding to each access opportunity.

[0105] 随后,利用目标基站的切换指令的传输装置发送切换请求确认给源基站,消息中包括目标基站为移动终端分配的无线资源和多个接入时机的信息。 [0105] Subsequently, using a switching instruction to switch the target base station transmits a transmission request acknowledgment to the source base station apparatus, the radio resource message includes the information and the access timing of a plurality of target base stations assigned to the mobile terminal.

[0106] 源基站发送切换命令给移动终端,消息中包括目标基站为移动终端分配的多个接入时机和与之对应的无线资源的信息。 [0106] source base station sends a handover command to the mobile terminal, the message comprising information of a target base station for the mobile terminal allocated to a plurality of timing and access corresponding radio resources.

[0107] 收到切换命令后,移动终端的切换装置8011根据当前的实际时间,在多个接入时机中选择时域上将最先到达的接入时机执行切换。 After the [0107] received handover command, the switching means 8011 of the mobile terminal according to the actual current time, on the selected domain when the access time in the access time to the plurality of first arrival perform handover.

[0108] 移动终端在目标基站分配的无线资源上给目标基站发送切换接入消息。 [0108] transmitted to the target base station at the target base station on the mobile terminal the radio resources allocated handover access message. 目标基站在收到切换接入消息以后,如果还存在移动终端没有利用的无线资源,须由放弃装置8033 释放这些无线资源,然后给移动终端发送切换接入确认消息。 Target base station after receiving the handover access message, if there is a radio resource not used by the mobile terminal, shall be abandoned apparatus 8033 releases the radio resources to the mobile terminal then transmits handover access acknowledgment message. 移动终端发送切换完成消息给目标基站,切换流程结束。 The mobile terminal sends a handover complete message to the target base station, the handover procedure ends. 即,所述放弃装置包括所述移动终端利用所述无线资源向所述目标基站发送切换接入消息的装置;所述目标基站接收到所述切换接入消息后,释放分配给所述移动终端的没有利用到的无线资源,并向所述移动终端发送切换接入确认消息的装置;所述移动终端向所述目标基站发送切换完成消息的装置。 That is, to give up the use of the mobile terminal apparatus comprising the radio resource handover access message sending means to the target base station; the target base station after receiving the handover access message, said mobile terminal to deallocate not to use the radio resources, and transmits the handoff access mobile terminal apparatus of the confirmation message; transmitting terminal device to the target base station a handover complete message to the mobile.

[0109] 参图9所示,如果通信网络各节点之间是同步的,并且目标基站给终端分配的无线资源可以用于传输数据,则目标基站给终端分配的无线资源可以直接用于发送切换完成消息,则基站间的切换流程中切换接入过程可以省略,具体步骤如下: [0109] Cf. FIG. 9, if a synchronous communication network between the nodes, and the target base station to the terminal may be allocated radio resource for transmitting data, the target base station to the terminal is allocated radio resource for transmitting the handover can be directly complete message, the handover procedure between the base station handover access procedure may be omitted, the following steps:

[0110] 901 :移动终端发送测量报告给源基站。 [0110] 901: The mobile terminal sends a measurement report to the source base station.

[0111] 902:源基站根据测量报告和切换控制策略判断需要切换,并且选定切换的目标基站。 [0111] 902: The source base station determines the control strategy needs to handover and handover measurement report, and the selected handover target base station.

[0112] 903 :源基站发送切换请求给目标基站,消息中包含必要的通讯上下文。 [0112] 903: The source base station sends a handover request to the target base station, the message context contains the necessary communications.

[0113] 904 :目标基站在判断允许切换以后,为移动终端接入本基站确定多个接入时机, 对于个各个接入时机,还分配适当的无线资源。 [0113] 904: allowing the target base station after the handover, the mobile terminal accesses a plurality of access base station determines the present time is determined, the access time for a respective further appropriate radio resource allocation.

[0114] 905:目标基站发送切换请求确认给源基站,消息中包括目标基站为移动终端分配的无线资源和多个接入时机。 [0114] 905: The target base station sends a handover request acknowledgment to the source base station, the message comprising a plurality of radio resources and access to the target base station timing assigned to the mobile terminal.

[0115] 906:源基站发送切换命令给移动终端,消息中包括目标基站为终端分配的无线资源和多个接入时机。 [0115] 906: The source base station sends a handover command to the mobile terminal, the message comprising a plurality of radio resources and access to the target base station timing assigned to the terminal.

[0116] 907 :收到切换命令后,移动终端根据当前的实际时间,在多个接入时机中选择时域上将最先到达的接入时机执行切换。 [0116] 907: After receiving the handover command, the mobile terminal according to the actual current time, when the plurality of selection field on the access time in the access time to reach the first switching is performed.

[0117] 908:移动终端在目标基站分配的无线资源上给目标基站发送切换完成消息给目标基站。 [0117] 908: the mobile terminal on the target base station allocates radio resources to the target base station transmits a handover complete message to the target base station.

[0118] 909 :目标基站在收到切换完成消息以后,如果还存在移动终端没有利用的用于发送切换完成消息的无线资源,须释放这些无线资源,切换流程结束。 [0118] 909: the target base station after receiving the handover complete message, if there is a radio resource not used by the mobile terminal for transmitting a handover complete message shall release the radio resources, the handover procedure ends.

[0119] 参图10所示,如果切换是在基站内不同小区间发生,则一般能够保证切换前移动终端和目标小区之间就可以同步,如果基站给移动终端分配的无线资源仅用于发送资源调度请求,则需要切换接入流程,具体步骤如下: [0119] Cf. FIG. 10, if the handover is generated between base stations in different cells, it is generally possible to ensure that the switching can be synchronized between the mobile terminal and the target cell before, the radio base station to the mobile terminal if the resources allocated for transmitting only resource scheduling request, handover access process is required, the following steps:

[0120] 1001 :移动终端发送测量报告给基站。 [0120] 1001: The mobile terminal sends a measurement report to the base station.

[0121] 1002:基站根据测量报告和切换控制策略判断需要切换到本基站的另一个小区。 [0121] 1002: The base station control strategy determines the measurement report and handover need to switch to another cell of this base station. [0122] 1003:基站在判断允许切换以后,为移动终端接入本基站确定多个接入时机,对于各个接入时机,还分配适当的无线资源,用于移动终端可以发送资源调度请求。 [0122] 1003: After the handover base station is determined allowing for the mobile terminal to access a plurality of access base station determines the present time, for each access time, but also to allocate appropriate radio resources for the mobile terminal may send a resource scheduling request.

[0123] 1004 :基站发送切换命令给终端,消息中包括为终端分配的无线资源和多个接入时机。 [0123] 1004: The base station transmits a handover command to the terminal, the message comprising a plurality of radio resources and the access timing assigned to the terminal.

[0124] 1005 :收到切换命令后,移动终端根据当前的实际时间,在多个接入时机中选择时域上将最先到达的接入时机执行切换。 [0124] 1005: after receiving the handover command, the mobile terminal according to the actual current time, when the plurality of selection field on the access time in the access time to reach the first switching is performed.

[0125] 1006:移动终端在基站分配的无线资源上给目标小区发送切换接入消息,请求发送切换完成消息的资源。 [0125] 1006: The mobile terminal sends a handover access message to the target cell in the base station allocates radio resources, handover resource request complete message.

[0126] 1007:基站在收到切换接入消息以后,如果还存在移动终端没有利用的无线资源, 须释放这些无线资源,然后给移动终端发送切换接入确认消息,消息中包含为该移动终端分配的发送切换完成消息的无线资源。 [0126] 1007: after receiving the base station handover access message, if there is a radio resource not used by the mobile terminal, shall release the radio resources to the mobile terminal and access confirmation handover message, and the message for the mobile terminal comprising transmitting the allocated radio resources handover complete message.

[0127] 1008 :移动终端发送切换完成消息给目标小区,切换流程结束。 [0127] 1008: The mobile terminal sends a handover complete message to the target cell, handover procedure ends.

[0128] 参图11所示,如果在基站内不同小区间发生切换时基站给移动终端分配的无线资源可以用于传输数据,则基站给移动终端分配的无线资源可以直接用于发送切换完成消息,则切换接入流程可以省略,具体步骤如下: [0128] reference to FIG. 11, the radio base station resources can be allocated to the mobile terminal for transmitting data if a handover occurs between different cells in the base station, the mobile station to the radio resource allocated to the terminal may be directly used to transmit the handover complete message , the handover access process can be omitted, the following steps:

[0129] 1101 :移动终端发送测量报告给基站。 [0129] 1101: The mobile terminal sends a measurement report to the base station.

[0130] 1102:基站根据测量报告和切换控制策略判断需要切换到本基站的另一个小区。 [0130] 1102: The base station control strategy determines the measurement report and handover need to switch to another cell of this base station.

[0131] 1103:基站在判断允许切换以后,为移动终端接入本基站确定多个接入时机,对于各个接入时机,还分配适当的无线资源,用于移动终端可以发送切换完成消息。 [0131] 1103: After the handover base station is determined allowing for the mobile terminal to access a plurality of access base station determines the present time, for each access time, but also to allocate appropriate radio resources for the mobile terminal may send a handover complete message.

[0132] 1104:基站发送切换命令给移动终端,消息中包括为终端分配的无线资源和多个接入时机。 [0132] 1104: The base station transmits a handover command to the mobile terminal, the message comprising a plurality of radio resources and the access timing assigned to the terminal.

[0133] 1105:收到切换命令后,移动终端根据当前的实际时间,在多个接入时机中选择时域上将最先到达的接入时机执行切换。 [0133] 1105: after receiving the handover command, the mobile terminal according to the actual current time, when the plurality of selection field on the access time in the access time to reach the first switching is performed.

[0134] 1106:移动终端在基站分配的无线资源上给目标小区发送切换完成消息。 [0134] 1106: the mobile terminal at a base station radio resource allocated to the target cell sends a handover complete message.

[0135] 1107:基站在收到切换完成消息以后,如果还存在移动终端没有利用的用于切换的无线资源,须释放这些无线资源,切换流程结束。 [0135] 1107: The base station after receiving the handover complete message, if there is a radio resource not used by the mobile terminal for handover shall release the radio resources, the handover procedure ends.

[0136] 当然,本发明还可有其他多种实施例,在不背离本发明精神及其实质的情况下,熟悉本领域的技术人员当可根据本发明作出各种相应的改变和变形,但这些相应的改变和变形都应属于本发明所附的权利要求的保护范围。 [0136] Of course, the present invention may have various other embodiments without departing from the spirit and the essence of the present invention, those skilled in the art can make various corresponding modifications and variations according to the present invention, but these corresponding changes and variations should fall within the scope of the appended claims.

Claims (15)

1. 一种移动通信系统的切换方法,用于移动终端在不同基站间的切换,其特征在于,包括:确定目标基站的步骤,用于通过源基站确定一目标基站,并且向所述目标基站发送切换请求;分配资源的步骤,用于所述目标基站为所述移动终端在最大传输时延下的接入时机和最小传输时延下的接入时机之间分配多个接入时机,并为每个所述接入时机分配对应的无线资源;切换命令的传输步骤,用于所述目标基站通过所述源基站向所述移动终端发送所述接入时机以及对应的无线资源的信息;切换步骤,用于所述移动终端收到所述切换命令后,根据接收到切换命令的时刻在所述多个接入时机中选择时域上最先到达的接入时机进行切换。 1. A method for switching a mobile communication system, a mobile terminal for switching between different base stations, characterized by comprising: the step of determining the target base station, means for determining a target base station via the source base station to the target base station and transmitting a handover request; step of allocating resources, the target base station for the mobile terminal is assigned a plurality of access timing between the access time and the access time to the minimum transmission delay is at the maximum transmission delay, and allocation of radio resources corresponding to each of the access timing; step of transmitting a handover command for the target base station transmits the timing and access information of the wireless resources corresponding to the mobile terminal by the source base station; after switching step, for said mobile terminal receiving the handover command, switching to the time received handover command selects the access timing of the first to arrive in the time domain of the time according to the plurality of access.
2.如权利要求1所述的切换方法,其特征在于,所述多个接入时机包括:最小传输时延情况下的接入时机、最大传输时延情况下的接入时机以及正常传输时延情况下的接入时机,所述传输时延是指所述切换命令从所述目标基站到所述移动终端的传输时延。 The access time to the minimum transmission delay, the access time at the normal maximum transmission delay and the transmission case: 2. The handover method according to claim 1, wherein said plurality of access timing comprises the access time delay in the case where the transmission delay refers to the handover command from the target base station to the mobile terminal transmission delays.
3.如权利要求1所述的切换方法,其特征在于,所述无线资源用于发送资源调度请求而不能直接发送切换完成消息,所述切换步骤进一步包括:所述移动终端利用所述无线资源向所述目标基站发送切换接入消息; 所述目标基站接收到所述切换接入消息后,释放分配给所述移动终端的没有利用到的无线资源,并向所述移动终端发送切换接入确认消息; 所述移动终端向所述目标基站发送切换完成消息。 3. The handover method according to claim 1, wherein the radio resource for transmitting a scheduling request resource can not directly send a handover complete message, the switching step further comprises: the mobile terminal using the radio resources sends a handover access message to the target base station; the target base station after receiving the handover access message, releases allocated to the mobile terminal is not using the radio resource, to the mobile terminal sends the handover access acknowledgment message; the mobile terminal sends a handover complete message to the target base station.
4.如权利要求1所述的切换方法,其特征在于,所述无线资源能够用于直接发送切换完成消息,所述切换步骤进一步包括:所述移动终端利用所述无线资源向所述目标基站发送切换完成消息; 所述目标基站接收到所述切换完成消息后,释放分配给所述移动终端的没有利用到的无线资源。 4. The handover method according to claim 1, wherein the radio resource can be used to directly transmit the handover complete message, the switching step further comprises: the mobile terminal using the radio resources to the target base station transmitting the handover complete message; the target base station after receiving the handover complete message, releases the assigned not to use the mobile terminal to a radio resource.
5.如权利要求1所述的切换方法,其特征在于,所述通过源基站确定一目标基站的步骤进一步包括:所述移动终端向所述源基站发送测量报告;所述源基站根据所述测量报告以及设定的切换控制策略判断是否需要切换,如果需要,选定切换的目标基站。 5. The handover method according to claim 1, wherein said step of determining a target base station by the source base station further comprising: the mobile terminal sends a measurement report to the source base station; the source base station according to the whether the measurement report and handover control strategy determines the set to be switched, if desired, the selected handover target base station.
6.如权利要求1所述的切换方法,其特征在于,对应每个所述接入时机的所述无线资源,在时域上为一个子帧长度。 6. The handover method according to claim 1, wherein the radio resource corresponding to each of the access timing, in the time domain of a sub-frame length.
7. 一种移动通信系统的切换系统,用于移动终端在不同基站间的切换,其特征在于,包括:确定目标基站的装置,用于源基站确定一目标基站,并且向所述目标基站发送切换请求;分配资源的装置,用于所述目标基站为所述移动终端在最大传输时延下的接入时机和最小传输时延下的接入时机之间分配多个接入时机,并为每个所述接入时机分配对应的无线资源;切换命令的传输装置,用于所述目标基站通过所述源基站向所述移动终端发送所述接入时机以及对应的无线资源的信息;切换装置,用于所述移动终端收到所述切换命令后,根据接收到切换命令的时刻在所述多个接入时机中选择时域上最先到达的接入时机,并利用所述对应的无线资源与所述目标基站建立连接;放弃装置,用以在所述移动终端接入后放弃没有使用的无线资源。 A mobile communication system switching system for switching a mobile terminal between different base stations, characterized by comprising: means for determining a target base station for source base station determines a target base station, and transmits to the target base station switching request; means for allocating resources for the target base station for the mobile terminal is assigned a plurality of access timing between the access time and the access time to the minimum transmission delay at maximum transmission delay, and to each of said access corresponding to the radio resource allocation timing; switching command transmission means for transmitting the target base station the timing of the access information and the corresponding radio resources to the mobile terminal by the source base station; switching means for the mobile terminal after receiving the handover command, based on the time of the handover command is received in said plurality of access selection timing in the time domain, the access time of the first arrived, and using the corresponding establishing RRC connection with the target base station; abandon means for giving up radio resources are not used after the mobile access terminal.
8.如权利要求7所述的切换系统,其特征在于,所述多个接入时机包括:最小传输时延情况下的接入时机、最大传输时延情况下的接入时机以及正常传输时延情况下的接入时机。 8. A switching system according to claim 7, wherein said plurality of access time comprising: an access timing at the minimum transmission delay, the maximum access time under normal as well as transmission delay time of transmission access the timing delay in the case.
9.如权利要求7所述的切换系统,其特征在于,所述放弃装置进一步包括: 所述移动终端利用所述无线资源向所述目标基站发送切换接入消息的装置;所述目标基站接收到所述切换接入消息后,释放分配给所述移动终端的没有利用到的无线资源,并向所述移动终端发送切换接入确认消息的装置; 所述移动终端向所述目标基站发送切换完成消息的装置。 9. The switching system according to claim 7, wherein said means to abandon further comprising: the mobile terminal using the radio resources for transmitting the handover access message to the target base station apparatus; receiving the target base station after the handover access message, releases the assigned not to use the mobile terminal to the radio resource, to the mobile terminal apparatus transmits handover access message acknowledgment; mobile terminal transmits the handover to the target base station It means the complete message.
10. 一种移动通信系统的切换方法,用于移动终端在基站内不同小区间的切换,其特征在于,包括:确定目标小区的步骤,用于通过基站确定一目标小区;分配资源的步骤,用于所述基站为所述移动终端在最大传输时延下的接入时机和最小传输时延下的接入时机之间分配多个接入时机,并为每个所述接入时机分配对应的无线资源;切换命令的传输步骤,用于所述基站向所述移动终端发送所述接入时机以及对应的无线资源的信息;切换步骤,用于所述移动终端收到所述切换命令后,根据接收到切换命令的时刻在所述多个接入时机中选择时域上最先到达的接入时机进行切换。 10. A method of switching a mobile communication system, a mobile terminal for a handover between base stations of different cells within, characterized in that, comprising: the step of determining the target cell, means for determining a target cell by a base station; step of allocating resources, the mobile terminal is assigned a plurality of access timing between the access time and the access time to the minimum transmission delay at maximum transmission delay, and to assign each of the access timing for the base station corresponding to the radio resources; step of transmitting a handover command for the mobile terminal to the base station transmits the access information of the wireless resources and a corresponding timing; switching step, for said mobile terminal receiving the handover command , switching timing received handover command selects the access timing of the first to arrive in the time domain of the time according to the plurality of access.
11.如权利要求10所述的切换方法,其特征在于,所述多个接入时机包括:最小传输时延情况下的接入时机、最大传输时延情况下的接入时机以及正常传输时延情况下的接入时机,所述传输时延是指所述切换命令从目标小区到到所述移动终端的传输时延。 11. The handover method according to claim 10, wherein said plurality of access time comprising: an access timing at the minimum transmission delay, the maximum access time under normal as well as transmission delay time of transmission the access time delay in the case where the transmission delay refers to the transmission delay from the target cell to the mobile terminal to the handover command.
12.如权利要求10所述的切换方法,其特征在于,所述无线资源用于发送资源调度请求而不能直接发送切换完成消息,所述切换步骤进一步包括:所述移动终端利用所述无线资源向所述目标小区发送切换接入消息; 所述基站接收到所述切换接入消息后,释放分配给所述移动终端的没有利用到的无线资源,并向所述移动终端发送切换接入确认消息; 所述移动终端向所述目标小区发送切换完成消息。 12. The handover method according to claim 10, wherein the radio resource for transmitting a scheduling request resource can not directly send a handover complete message, the switching step further comprises: the mobile terminal using the radio resources transmitting to the target cell handover access message; the base station after receiving the handover access message, releases the assigned not to use the mobile terminal to the radio resource, to the mobile terminal sends the handover access confirmation message; the mobile terminal sends a handover complete message to the target cell.
13.如权利要求10所述的切换方法,其特征在于,所述无线资源能够用于直接发送切换完成消息,所述切换步骤进一步包括:所述移动终端利用所述无线资源向所述目标小区发送切换完成消息; 所述基站接收到所述切换完成消息后,释放分配给所述移动终端的没有利用到的无线资源。 13. The handover method according to claim 10, wherein the radio resource can be used to directly transmit the handover complete message, the switching step further comprises: the mobile terminal using the radio resource to the target cell transmitting the handover complete message; the base station after receiving the handover complete message, releases the assigned not to use the mobile terminal to a radio resource.
14.如权利要求10所述的切换方法,其特征在于,所述通过基站确定一目标小区的步骤进一步包括:所述移动终端向所述基站发送测量报告;所述基站根据所述测量报告以及设定的切换控制策略判断是否需要切换,如果需要, 选定切换的目标小区。 14. The handover method according to claim 10, wherein said determining a target cell by the base station further comprising the step of: the mobile terminal sends a measurement report to the base station; and the station according to the measurement report and whether to set a switching control strategy is determined to be switched, if desired, the selected handover target cell.
15.如权利要求10所述的切换方法,其特征在于,对应每个所述接入时机的所述无线资源,在时域上为一个子帧长度。 15. The handover method according to claim 10, wherein the radio resource corresponding to each of the access timing, in the time domain of a sub-frame length.
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