WO2013152564A1 - 用于gsm终端分组交换域切换的方法和系统 - Google Patents

用于gsm终端分组交换域切换的方法和系统 Download PDF

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Publication number
WO2013152564A1
WO2013152564A1 PCT/CN2012/077696 CN2012077696W WO2013152564A1 WO 2013152564 A1 WO2013152564 A1 WO 2013152564A1 CN 2012077696 W CN2012077696 W CN 2012077696W WO 2013152564 A1 WO2013152564 A1 WO 2013152564A1
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Prior art keywords
handover
value
physical layer
protocol stack
switching
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PCT/CN2012/077696
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English (en)
French (fr)
Inventor
丁洁莹
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中兴通讯股份有限公司
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Application filed by 中兴通讯股份有限公司 filed Critical 中兴通讯股份有限公司
Priority to US14/391,464 priority Critical patent/US9516565B2/en
Priority to EP12874135.2A priority patent/EP2822324B1/en
Publication of WO2013152564A1 publication Critical patent/WO2013152564A1/zh

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Classifications

    • HELECTRICITY
    • H04ELECTRIC COMMUNICATION TECHNIQUE
    • H04WWIRELESS COMMUNICATION NETWORKS
    • H04W36/00Hand-off or reselection arrangements
    • H04W36/0005Control or signalling for completing the hand-off
    • H04W36/0083Determination of parameters used for hand-off, e.g. generation or modification of neighbour cell lists
    • H04W36/00837Determination of triggering parameters for hand-off
    • HELECTRICITY
    • H04ELECTRIC COMMUNICATION TECHNIQUE
    • H04WWIRELESS COMMUNICATION NETWORKS
    • H04W36/00Hand-off or reselection arrangements
    • H04W36/0005Control or signalling for completing the hand-off
    • H04W36/0055Transmission or use of information for re-establishing the radio link
    • H04W36/0072Transmission or use of information for re-establishing the radio link of resource information of target access point
    • HELECTRICITY
    • H04ELECTRIC COMMUNICATION TECHNIQUE
    • H04WWIRELESS COMMUNICATION NETWORKS
    • H04W36/00Hand-off or reselection arrangements
    • H04W36/0005Control or signalling for completing the hand-off
    • H04W36/0083Determination of parameters used for hand-off, e.g. generation or modification of neighbour cell lists
    • H04W36/00835Determination of neighbour cell lists
    • HELECTRICITY
    • H04ELECTRIC COMMUNICATION TECHNIQUE
    • H04WWIRELESS COMMUNICATION NETWORKS
    • H04W56/00Synchronisation arrangements
    • H04W56/004Synchronisation arrangements compensating for timing error of reception due to propagation delay
    • H04W56/0045Synchronisation arrangements compensating for timing error of reception due to propagation delay compensating for timing error by altering transmission time
    • HELECTRICITY
    • H04ELECTRIC COMMUNICATION TECHNIQUE
    • H04WWIRELESS COMMUNICATION NETWORKS
    • H04W56/00Synchronisation arrangements
    • H04W56/0005Synchronisation arrangements synchronizing of arrival of multiple uplinks

Definitions

  • the present invention relates to the field of Global System for Mobile Communications (GSM) handover, and more particularly to a method and system for GSM terminal packet switched (PS) domain handover.
  • GSM Global System for Mobile Communications
  • PS packet switched
  • GSM networks in some regions have supported the R9 version of the protocol.
  • One of the new functions in the R9 protocol supports PS switching, and it is required to provide users with no-aware channel switching.
  • the terminal Before the R9 version, PS switching is not supported. If the original channel quality deteriorates, the channel must be changed by cell reselection. That is, after the terminal measures the original channel quality, the terminal initiates a reselection process. Synchronizing the target handover cell in the IDLE state, and interacting with the handover target cell to acquire a system message of the handover target cell; and camping on the handover target cell according to the acquired system message of the handover target cell.
  • the entire reselection process interrupts the PS service for a period of time. For example, if the user is downloading, the download service may be interrupted for a period of time, which is disadvantageous for the user. Experience.
  • Embodiments of the present invention provide a method for GSM terminal packet switching (PS) domain handover.
  • PS packet switching
  • a method for packet switching (PS) domain switching according to an embodiment of the present invention is used for a terminal, where the method includes:
  • the terminal protocol stack After receiving the handover command from the network side, the terminal protocol stack notifies the physical layer to release and is currently small. Physical channel of the zone;
  • the terminal protocol stack sends a synchronization request message to the physical layer to instruct the physical layer to synchronously switch the target cell. After receiving the synchronization confirmation message from the physical layer, the terminal protocol stack sends a resident request message to the physical layer.
  • the message carries a system message from the handover target cell on the network side;
  • the physical layer After the physical layer camps on the handover target cell according to the system message of the handover target cell, the physical layer feeds back a camp confirmation message to the terminal protocol stack;
  • the terminal protocol stack After receiving the acknowledgment message sent by the physical layer, the terminal protocol stack sends a handover request message to the physical layer, where the handover request message includes a handover type and a TA value range;
  • the physical layer is determined according to the parameter included in the handover request message and the currently stored TA value.
  • the terminal protocol stack instructs the physical layer to establish a physical channel with the handover target cell.
  • the step of determining, by the physical layer, whether the PS handover is continued according to the parameter included in the handover request message and the currently stored TA value includes:
  • the switching type is the synchronous switching
  • the handover request message sent by the terminal protocol stack to the physical layer includes the handover type and the TA value range, and includes whether the TA value is allowed to exceed the range identifier;
  • the switching type is synchronous, it is determined whether the TA value is allowed to exceed the range. If the TA value is allowed to exceed the range, the PS switching is continued. If the TA value is not allowed to exceed the range, it is determined whether the currently stored TA value exceeds the TA value range. If the currently stored TA value does not exceed the TA value range, the PS handover is continued; if the currently stored TA value exceeds the TA value range, the PS handover is terminated.
  • the TA value currently stored by the physical layer is equal to the TA value sent by the terminal protocol stack to the physical layer by using the handover request message;
  • the current stored TA value of the physical layer is equal to 1.
  • the method further includes: the terminal protocol stack reconfiguring the physical layer according to the TA value and the power control parameter of the handover source cell.
  • the physical layer receives the notification of the terminal protocol stack and releases the physical channel of the current cell, and reports the TA value and the power control parameter of the current cell to the terminal protocol stack.
  • the terminal protocol stack configures the physical layer according to the saved TA value and the power control parameter.
  • a packet switching (PS) domain switching system is used for a terminal, where the system includes a terminal protocol stack module and a physical layer module.
  • the terminal protocol stack module is configured to: after receiving the handover command from the network side, notify the physical layer module to release the physical channel with the current cell; and after learning that the physical layer module releases the physical channel of the current cell, send the physical layer module to the physical layer module.
  • a synchronization request message instructing the physical layer module to synchronously switch the target cell; after receiving the synchronization confirmation message from the physical layer module, sending a residing request message to the physical layer module, where the residing request message carries the network side
  • the system message of the handover target cell is received; the resident acknowledgement message fed back by the physical layer module is received; after receiving the resident acknowledgement message sent by the physical layer module, the handover request message is sent to the physical layer module, where the handover request message includes the handover type and the TA a value range; a judgment result of whether the handover of the feedback of the physical layer module is continued, and when the judgment result is that the PS handover is continued, the terminal protocol stack module instructs the physical layer module to establish a physical channel with the
  • the physical layer module is configured to: release a physical channel with the current cell, and notify the terminal protocol stack module of the release result; synchronously switch the target cell, and feed back a synchronization acknowledgement message to the terminal protocol stack module; according to the handover target cell System message resides in the handover target cell, to the terminal The protocol stack module feeds back the acknowledgment message; determines whether the PS handover continues according to the parameter included in the handover request message and the currently stored TA value, and sends the determination result to the terminal protocol stack module; and establishes a physical channel with the handover target cell.
  • the physical layer module is configured to determine whether the PS handover continues according to the parameter included in the handover request message and the currently stored TA value in the following manner:
  • the PS switching is continued.
  • the switching type is synchronous switching, it is determined whether the currently stored TA value exceeds the TA value range. If the currently stored TA value does not exceed the TA value range, the PS switching is continued. If the currently stored TA value exceeds the TA value range, the PS switch is terminated.
  • the terminal protocol stack module is further configured to include, in the handover request message sent to the physical layer module, an identifier indicating whether the TA value is allowed to be out of range;
  • the physical layer module is configured to determine whether the PS handover continues according to the parameter included in the handover request message and the currently stored TA value in the following manner: when the handover type is asynchronous handover, continue PS handover; when the handover type is synchronous handover
  • the PS switching is continued; if the TA value is not allowed to exceed the range, it is determined whether the currently stored TA value exceeds the TA value range, if the currently stored TA If the value does not exceed the range of the TA value, the PS switching is continued; if the currently stored TA value exceeds the TA value range, the PS switching is terminated.
  • the TA value currently stored by the physical layer module is equal to the TA value sent by the terminal protocol stack module to the physical layer module by using the handover request message;
  • the current stored TA value of the physical layer module is equal to 1.
  • the terminal protocol stack module is further configured to reconfigure the physical layer module according to the TA value and the power control parameter of the handover source cell when the judgment result is the termination PS handover.
  • the physical layer module is further configured to release the current channel while releasing the physical channel of the current cell
  • the TA value and the power control parameter of the cell are reported to the terminal protocol stack module;
  • the terminal protocol stack module is further configured to: save a TA value and a power control parameter of a current cell reported by the physical layer module, and configure the physical layer module according to the saved TA value and a power control parameter.
  • Embodiments of the present invention also provide a GSM terminal, including the system as described above.
  • the technical solution for implementing the cell handover by the foregoing terminal uses the physical layer that is similar to the cell reselection process of the existing terminal to synchronize with the handover target cell, and performs the operation of camping with the handover target cell, so that the cell handover process of the present application can be utilized.
  • the existing cell reselection platform has a small change in the communication process of the existing terminal, and is convenient to implement.
  • the system of the handover target cell required for the terminal of the above-mentioned technical solution and the handover target cell to perform the resident operation is performed.
  • the message does not need to be obtained by the terminal to be exchanged with the handover target cell, and the camping time is reduced.
  • the handover request process inside the terminal increased by the above technical solution takes up millisecond time, and the time delay caused by the user is not perceived by the user. .
  • FIG. 1 is a flowchart of a method for GSM terminal packet switching (PS) domain handover according to the embodiment
  • FIG. 2 is a physical layer of the embodiment, determining a PS switch according to a parameter included in a handover request message and a currently stored TA value. Whether to continue the flow chart;
  • PS GSM terminal packet switching
  • FIG. 3 is a flowchart of another physical layer according to the parameter included in the handover request message and the currently stored TA value to determine whether the PS handover continues;
  • FIG. 4 is a system composition diagram of a GSM terminal packet switching (PS) domain handover according to the embodiment.
  • PS packet switching
  • FIG. 1 is a flowchart of a method for packet switching (PS) domain handover of a GSM terminal according to an embodiment of the present invention.
  • PS packet switching
  • PFC Packet Traffic Context
  • the S101 terminal protocol stack receives a PS handover command (HANDOVER COMMAND) sent by the network side;
  • the terminal protocol stack receives the PS handover command in a packet transmission mode (PTM);
  • PTM packet transmission mode
  • the terminal protocol stack notifies the physical layer to release the physical channel with the current cell
  • the physical channel can be a temporary block stream (TBF);
  • the physical layer may also report the time advance TA value and the power control parameter of the current cell to the terminal protocol stack, such as the physical layer, through the callback function, the current cell TA value and the power control parameter. Reported to the terminal protocol stack;
  • the S103 terminal protocol stack sends a synchronization request message to the physical layer, instructing the physical layer to synchronously switch the target cell;
  • the terminal protocol stack sends a resident request message to the physical layer, where the residing request message carries the handover target cell system message from the network side;
  • the handover target cell system message may be sent by the network side to the terminal protocol stack by using a PACKET NEIGHBOUR CELL DATA message;
  • the time for the physical layer to interact with the target cell to obtain the target cell system message is saved, and the time required for the PS handover is met;
  • the terminal protocol stack sends a handover request message to the physical layer, where the handover request message includes a handover type and a TA value range;
  • step S108 The physical layer determines whether the PS handover is continued according to the parameter included in the handover request message and the currently stored TA value, and sends the determination result to the terminal protocol stack.
  • step S109 is performed;
  • step S110 is performed;
  • step S201 determining whether the switching type is synchronous switching, if yes, performing step S202; otherwise, Go to step S204;
  • step S202 determines whether the currently stored TA value exceeds the TA value range, if the TA value range is not exceeded, step S204 is performed; if the TA value range is exceeded, step S203 is performed;
  • the handover request message sent by the terminal protocol stack to the physical layer may include, in addition to the handover type and the TA value range, whether the TA value is allowed to be out of range identifier. :
  • step S301 determines whether the switching type is synchronous switching, if yes, step S302 is performed; otherwise, step S305 is performed;
  • step S302 determines whether the TA value is allowed to exceed the range, if the TA value is allowed to exceed the range, step S305 is performed; if the TA value is not allowed to exceed the range, step S303 is performed;
  • step S303 it is determined whether the currently stored TA value exceeds the TA value range, if the TA value range is not exceeded, step S305 is performed; if the TA value range is exceeded, step S304 is performed;
  • the TA value currently stored by the physical layer is equal to the TA value sent by the terminal protocol stack to the physical layer by using the handover request message; if the handover request message does not include the TA value, the physical layer sets the current stored TA value to be equal to 1.
  • the S109 terminal protocol stack indicates that the physical layer establishes a physical channel with the handover target cell, and the process ends.
  • the physical layer does not need to send the RACH to apply for the signaling channel when establishing the TBF, because the configuration information of the signaling channel is already Included in the handover command is sent by the network layer to the protocol stack, and the protocol stack sends it to the physical layer through the channel configuration message during the handover process;
  • the S110 terminal protocol stack reconfigures the physical layer according to the TA value and the power control parameter of the handover source cell, so that the terminal and the source cell re-establish a physical channel, and the process ends;
  • the terminal protocol stack can directly configure the physical layer according to the save. Successfully rolled back to the source cell after the PS switch fails. Whether or not the terminal saved by the terminal protocol stack has a direct relationship between the TA value of the handover source cell and the power control parameter. If the saved terminal has too much TA value and power control parameter in the handover source cell, the source of the fallback is caused. The probability of cell failure increases.
  • the physical layer releases the current cell's TA value and the power control parameter on the terminal protocol stack while releasing the physical channel of the current cell, ensuring that the terminal protocol stack save information is up to date. , greatly improving the success rate of terminal fallback.
  • FIG. 4 is a system composition diagram of a GSM terminal packet switching (PS) domain handover according to the embodiment.
  • the system includes a terminal protocol stack module and a physical layer module, where
  • the terminal protocol stack module is configured to: after receiving the handover command from the network side, notify the physical layer module to release the physical channel with the current cell; and after learning that the physical layer module releases the physical channel of the current cell, send a synchronization request to the physical layer module.
  • a message instructing the physical layer module to synchronously switch the target cell; after receiving the synchronization confirmation message from the physical layer module, sending a residing request message to the physical layer module, where the residing request message carries the handover from the network side Receiving a system acknowledgment message fed back by the physical layer module; receiving the acknowledgment message sent by the physical layer module, sending a handover request message to the physical layer module, where the handover request message includes a handover type and a TA value range Receiving a judgment result of whether the switching of the feedback of the physical layer module continues, and when the judgment result is that the PS handover is continued, the terminal protocol stack module instructs the physical layer module to establish a physical channel with the handover target cell;
  • a physical layer module configured to release a physical channel with the current cell, and notify the terminal protocol stack module of the release result; synchronously switch the target cell, and feed back a synchronization confirmation message to the terminal protocol stack module; according to the system for switching the target cell
  • the message is camped on the handover target cell, and the resident protocol acknowledgement message is fed back to the terminal protocol stack module; whether the PS handover is continued according to the parameter included in the handover request message and the currently stored TA value, and the determination result is sent to the terminal protocol stack module. ; establishing a physical channel with the handover target cell;
  • the physical layer module may perform the following steps to determine the PS switch according to the parameters included in the handover request message and the currently stored TA value:
  • the physical layer module is configured to continue PS switching when the switching type is asynchronous switching; when the switching type is synchronous switching, continue to determine whether the currently stored TA value exceeds the TA value range, if If the currently stored TA value does not exceed the TA value range, the PS handover is continued; if the currently stored TA value exceeds the TA value range, the PS handover is terminated.
  • the handover request message sent by the terminal protocol stack module to the physical layer module further includes whether the TA value is allowed to be out of range, the step of determining, by the physical layer module, the PS handover according to the parameter included in the handover request message and the currently stored TA value.
  • the physical layer module is further configured to: when the switching type is synchronous switching, first determine whether the TA value is allowed to exceed the range, and if the TA value is allowed to exceed the range, continue the PS switching; if the TA value is not allowed to exceed the range, determine the current storage. Whether the TA value exceeds the TA value range, if the currently stored TA value does not exceed the TA value range, the PS switching is continued; if the currently stored TA value exceeds the TA value range, the PS switching is terminated.
  • the TA value currently stored by the physical layer module is equal to the TA value sent by the terminal protocol stack module to the physical layer module by using the handover request message; when the handover request message does not include the TA value, the physical layer module is currently The stored TA value is equal to one.
  • the terminal protocol stack module receives the result of the judgment from the physical layer module as terminating the PS switch, the terminal protocol stack module is further configured to reconfigure the physical layer module according to the TA value and the power control parameter of the handover source cell.
  • the TA value and the power control parameter of the terminal in the handover source cell may be reported by the physical layer module to be released by the terminal protocol stack module while releasing the physical channel of the current cell; the terminal protocol stack module may be saved according to the physical layer module.
  • the physical layer module is configured by the TA value of the current cell and the power control parameter.
  • each module/unit in the foregoing embodiment may be implemented in the form of hardware, or may use software functions.
  • the form of the module is implemented. The invention is not limited to any specific form of combination of hardware and software.
  • the technical solution for implementing the cell handover by the foregoing terminal uses the physical layer that is similar to the cell reselection process of the existing terminal to synchronize with the handover target cell, and performs the operation of camping with the handover target cell, so that the cell handover process of the present application can be utilized.
  • the existing cell reselection platform has a small change in the communication process of the existing terminal, and is convenient to implement.
  • the system of the handover target cell required for the terminal of the above-mentioned technical solution and the handover target cell to perform the resident operation is performed.
  • the message does not need to be obtained by the terminal to be exchanged with the handover target cell, and the camping time is reduced.
  • the handover request process inside the terminal increased by the above technical solution takes up millisecond time, and the time delay caused by the user is not perceived by the user. .

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  • Computer Networks & Wireless Communication (AREA)
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Abstract

一种用于GSM终端PS换域切换的方法和系统,该方法包括:终端协议栈接收来自网络侧的切换命令,通知物理层释放与当前小区的物理信道;终端协议栈向物理层发送同步请求;终端协议栈收到反馈回的同步确认消息后向物理层发送驻留请求,携带来自网络侧的切换目标小区的系统消息;物理层根据系统消息驻留到目标小区;终端协议栈收到物理层的驻留确认消息后向物理层发送切换请求,携带切换类型和TA值范围;物理层根据切换请求携带的参数和存储的TA值判断PS切换是否继续,并将判断结果发送至终端协议栈;当PS切换继续时,终端协议栈指示物理层与目标小区建立物理信道。

Description

用于 GSM终端分组交换域切换的方法和系统
技术领域
本发明涉及全球移动通讯系统(GSM )切换领域, 尤其涉及用于 GSM 终端分组交换(PS )域切换的方法和系统。 背景技术
随着 GSM网络的优化升级, 目前已有部分地区 GSM网络支持 R9版本 的协议, R9协议中新增的功能中有一项为支持 PS切换, 需要为用户提供无 感知的信道切换功能。
R9版本之前, 都是不支持 PS切换的, 如果原有信道质量变差, 就必须 通过小区重选的方式来变换信道, 即终端测量到原有信道质量变差后, 自身 发起重选流程; 在 IDLE 态下同步目标切换小区, 与切换目标小区交互获取 切换目标小区的系统消息; 根据获取到的切换目标小区的系统消息驻留至该 切换目标小区。 由于终端与切换目标小区交互获取切换目标小区的系统消息 费时, 这样会导致整个重选流程中断 PS业务一段时间, 譬如用户正在下载, 该下载业务就会出现一段时间的断流, 这个不利于用户体验。
为使终端支持 PS切换,现有的技术方案通常会修改终端基带芯片的整体 实现方案并新增支持该功能的所有代码, 波及面较大, 对系统稳定性不利, 并且会增加研发和测试成本。 发明内容
本发明实施例提供了一种用于 GSM终端分组交换(PS )域切换的方法 术问题。
本发明实施例的分组交换(PS )域切换的方法, 用于终端, 所述方法包 括:
终端协议栈接收到来自网络侧的切换命令后, 通知物理层释放与当前小 区的物理信道;
终端协议栈向物理层发送同步请求消息,指示物理层同步切换目标小区; 终端协议栈待收到来自物理层的同步确认消息后, 向所述物理层发送驻 留请求消息, 所述驻留请求消息中携带来自网络侧的所述切换目标小区的系 统消息;
物理层根据该切换目标小区的系统消息驻留到切换目标小区后, 向终端 协议栈反馈驻留确认消息;
终端协议栈待收到物理层发送的驻留确认消息后, 向物理层发送切换请 求消息, 该切换请求消息包含切换类型和 TA值范围;
所述物理层根据所述切换请求消息包含的参数和当前存储的 TA值判断
PS切换是否继续, 并将判断结果发送至终端协议栈;
当所述判断结果为继续 PS切换时,终端协议栈指示物理层与切换目标小 区建立物理信道。
可选的,所述物理层根据所述切换请求消息包含的参数和当前存储的 TA 值判断 PS切换是否继续的步骤包括:
若切换类型为异步切换, 则继续 PS切换;
若切换类型为同步切换,则判断当前存储的 TA值是否超出了 TA值范围, 若当前存储的 TA值没有超出 TA值范围,则继续 PS切换;若当前存储的 TA 值超出 TA值范围, 则终止 PS切换。
可选的,
终端协议栈向物理层发送的切换请求消息除包含切换类型和 TA值范围 夕卜, 还包含是否允许 TA值超范围标识;
若切换类型为同步切换,判断是否允许 TA值超范围,若允许 TA值超范 围, 则继续 PS切换; 若不允许 TA值超范围, 再判断当前存储的 TA值是否 超出了 TA值范围, 若当前存储的 TA值没有超出 TA值范围, 则继续 PS切 换; 若当前存储的 TA值超出 TA值范围, 则终止 PS切换。
可选的, 物理层当前存储的 TA值等于终端协议栈通过所述切换请求消息发送给 物理层的 TA值;
当所述切换请求消息中不包含 TA值时,所述物理层当前存储的 TA值等 于 1。
可选的, 当所述判断结果为终止 PS切换时, 所述方法还包括: 所述终端协议栈按照终端在切换源小区的 TA值和功率控制参数重新配 置物理层。
可选的,
物理层接收终端协议栈的通知而释放与当前小区的物理信道的同时, 还 将当前小区的 TA值和功率控制参数上报所述终端协议栈;
当所述判断结果为终止 PS切换时, 所述终端协议栈按照保存的 TA值和 功率控制参数配置所述物理层。
本发明实施例的分组交换(PS )域切换的系统, 用于终端, 所述系统包 括终端协议栈模块和物理层模块,
所述终端协议栈模块设置为: 接收到来自网络侧的切换命令后, 通知物 理层模块释放与当前小区的物理信道; 以及获知物理层模块释放与当前小区 的物理信道后, 向物理层模块发送同步请求消息, 指示物理层模块同步切换 目标小区; 收到来自物理层模块的同步确认消息后, 向所述物理层模块发送 驻留请求消息, 所述驻留请求消息中携带来自网络侧的所述切换目标小区的 系统消息; 接收物理层模块反馈的驻留确认消息; 收到物理层模块发送的驻 留确认消息后, 向物理层模块发送切换请求消息, 该切换请求消息包含切换 类型和 TA值范围; 接收物理层模块反馈的切换是否继续的判断结果, 并在 判断结果为继续 PS切换时,终端协议栈模块指示物理层模块与切换目标小区 建立物理信道;
所述物理层模块设置为: 释放与当前小区的物理信道, 并将释放结果通 知所述终端协议栈模块; 同步切换目标小区, 并向终端协议栈模块反馈同步 确认消息; 根据所述切换目标小区的系统消息驻留到切换目标小区, 向终端 协议栈模块反馈驻留确认消息; 根据所述切换请求消息包含的参数和当前存 储的 TA值判断 PS切换是否继续, 并将判断结果发送至终端协议栈模块; 与 切换目标小区建立物理信道。
可选的, 所述物理层模块是设置为以如下方式根据所述切换请求消息包 含的参数和当前存储的 TA值判断 PS切换是否继续:
当切换类型为异步切换时, 继续 PS切换; 当切换类型为同步切换时, 继 续判断当前存储的 TA值是否超出了 TA值范围, 若当前存储的 TA值没有超 出 TA值范围, 则继续 PS切换; 若当前存储的 TA值超出 TA值范围, 则终 止 PS切换。
可选的,
所述终端协议栈模块还设置为在向物理层模块发送的切换请求消息中包 含是否允许 TA值超范围的标识 ;
所述物理层模块是设置为以如下方式根据所述切换请求消息包含的参数 和当前存储的 TA值判断 PS切换是否继续: 当切换类型为异步切换时, 继续 PS切换; 当切换类型为同步切换时, 先判断是否允许 TA值超范围, 若允许 TA值超范围, 则继续 PS切换; 若不允许 TA值超范围, 再判断当前存储的 TA值是否超出了 TA值范围, 若当前存储的 TA值没有超出 TA值范围, 则 继续 PS切换; 若当前存储的 TA值超出 TA值范围, 则终止 PS切换。
可选的,
物理层模块当前存储的 TA值等于所述终端协议栈模块通过所述切换请 求消息发送给物理层模块的 TA值;
当所述切换请求消息中不包含 TA值时, 所述物理层模块当前存储的 TA 值等于 1。
可选的,
所述终端协议栈模块还设置为当所述判断结果为终止 PS切换时,按照终 端在切换源小区的 TA值和功率控制参数重新配置物理层模块。
可选的,
所述物理层模块还设置为在释放与当前小区的物理信道的同时, 将当前 小区的 TA值和功率控制参数上报所述终端协议栈模块;
所述终端协议栈模块还设置为: 保存所述物理层模块上报的当前小区的 TA值和功率控制参数, 以及按照该保存的 TA值和功率控制参数配置所述物 理层模块。
本发明实施例还提供一种 GSM终端, 包括如上所述的系统。
上述终端实现小区切换的技术方案釆用了与现有终端实现小区重选流程 相似的物理层与切换目标小区进行同步、 与切换目标小区进行驻留等操作, 使得本申请的小区切换流程可以利用现有的小区重选平台, 对现有终端通信 流程改变较小, 实现方便; 另外为保证切换对用户无感知, 上述技术方案终 端与切换目标小区进行驻留操作所需的切换目标小区的系统消息不需要终端 与切换目标小区进行交互获得, 减少了驻留时间, 同时上述技术方案增加的 终端内部的切换请求流程, 占用的时间均为毫秒级时间, 由此造成的时间延 迟对用户无感知。 附图概述
图 1为本实施例的用于 GSM终端分组交换(PS )域切换的方法流程图; 图 2为本实施例的一种物理层根据切换请求消息包含的参数和当前存储 的 TA值判断 PS切换是否继续的流程图;
图 3为本实施例的另一种物理层根据切换请求消息包含的参数和当前存 储的 TA值判断 PS切换是否继续的流程图;
图 4为本实施例的用于 GSM终端分组交换(PS )域切换的系统组成图。 本发明的较佳实施方式
下文中将结合附图对本发明的实施例进行详细说明。 需要说明的是, 在 不冲突的情况下, 本申请中的实施例及实施例中的特征可以相互任意组合。
图 1为本实施例的 GSM终端分组交换(PS )域切换的方法流程图。 终端为支持 PS业务, 需要支持包流量上下文(PFC )过程。
S101 终端协议栈接收网络侧发送的 PS 切换命令 ( HANDOVER COMMAND );
终端协议栈在分组传输模式(PTM ) 时, 接收该 PS切换命令;
S102 终端协议栈通知物理层释放与当前小区的物理信道;
该物理信道可为临时块流(TBF ) ;
物理层在释放与当前小区的物理信道的同时还可将当前小区的时间提前 量 TA值和功率控制参数上报所述终端协议栈, 如物理层通过回调函数将当 前小区的 TA值和功率控制参数上报给终端协议栈;
S103终端协议栈向物理层发送同步请求消息, 指示物理层同步切换目标 小区;
S104 物理层向协议栈反馈同步确认消息;
S105 终端协议栈向所述物理层发送驻留请求消息,所述驻留请求消息中 携带来自网络侧的所述切换目标小区系统消息;
该切换目标小区系统消息可以通过 PACKET NEIGHBOUR CELL DATA 消息由网络侧发送给终端协议栈;
通过将切换目标小区系统消息发送给物理层, 节省了物理层与目标小区 交互获取目标小区系统消息的时间, 满足 PS切换对时间的要求;
S106 物理层根据该切换目标小区的系统消息驻留到切换目标小区后,向 终端协议栈反馈驻留确认消息;
S107 终端协议栈向物理层发送切换请求消息,该切换请求消息包含切换 类型和 TA值范围;
S108 物理层根据所述切换请求消息包含的参数和当前存储的 TA值判断 PS 切换是否继续, 并将判断结果发送至终端协议栈, 当判断结果是继续 PS 切换时, 执行步骤 S109; 当判断结果是终止 PS切换时, 执行步骤 S110;
具体判断过程如图 2所示:
S201 判断切换类型是否为同步切换, 如是, 执行步骤 S202;否则, 执行步骤 S204;
S202 判断当前存储的 TA值是否超出了 TA值范围,如没有超出 TA 值范围, 执行步骤 S204;如果超出 TA值范围, 则执行步骤 S203;
S203 终止 PS切换, 结束判断流程;
S204 继续 PS切换, 结束判断流程。
在其他实施例中, 终端协议栈向物理层发送的切换请求消息除包含切换 类型和 TA值范围外,还可包含是否允许 TA值超范围标识, 此时物理层的判 断过程如图 3所示:
S301判断切换类型是否为同步切换, 如是, 执行步骤 S302;否则, 执行步骤 S305;
S302判断是否允许 TA值超范围, 如允许 TA值超范围, 执行步骤 S305; 如果不允许 TA值超范围, 则执行步骤 S303;
S303判断当前存储的 TA值是否超出了 TA值范围,如没有超出 TA 值范围, 执行步骤 S305;如果超出 TA值范围, 则执行步骤 S304;
S304 终止 PS切换, 结束判断流程;
S305继续 PS切换, 结束判断流程。
上述物理层当前存储的 TA值等于终端协议栈通过所述切换请求消息发 送给物理层的 TA值; 若所述切换请求消息中不包含 TA值时, 则物理层设置 其当前存储的 TA值等于 1。
S109终端协议栈指示物理层与切换目标小区建立物理信道, 流程结束; 对于同步切换,物理层与新小区建立 TBF时不需要通过发送 RACH来申 请信令信道, 因为该信令信道的配置信息已经包含在切换命令中由网络层发 送至协议栈, 协议栈在切换过程中会通过信道配置消息将其发送给物理层;
S110终端协议栈按照终端在切换源小区的 TA值和功率控制参数重新配 置物理层, 以便终端与源小区重新建立物理信道, 流程结束;
若终端协议栈保存了终端在切换源小区的 TA值和功率控制参数, 终端 协议栈可直接按照该保存配置物理层。由于 PS切换失败后回退至源小区成功 与否, 和终端协议栈保存的终端在切换源小区的 TA值和功率控制参数有直 接的关系, 如果保存的终端在切换源小区的 TA值和功率控制参数过旧, 就 会导致回退源小区失败的概率增加, 而本实施例釆用物理层在释放与当前小 区的物理信道的同时将当前小区的 TA值和功率控制参数上 所述终端协议 栈, 确保了终端协议栈保存信息是最新的, 大大提高了终端回退的成功率。
图 4为本实施例的用于 GSM终端分组交换(PS )域切换的系统组成图。 该系统包括终端协议栈模块和物理层模块, 其中,
终端协议栈模块, 设置为接收到来自网络侧的切换命令后, 通知物理层 模块释放与当前小区的物理信道; 以及获知物理层模块释放与当前小区的物 理信道后, 向物理层模块发送同步请求消息, 指示物理层模块同步切换目标 小区; 收到来自物理层模块的同步确认消息后, 向所述物理层模块发送驻留 请求消息, 所述驻留请求消息中携带来自网络侧的所述切换目标小区的系统 消息; 接收物理层模块反馈的驻留确认消息; 收到物理层模块发送的驻留确 认消息后, 向物理层模块发送切换请求消息, 该切换请求消息包含切换类型 和 TA值范围; 接收物理层模块反馈的切换是否继续的判断结果, 并在判断 结果为继续 PS切换时,终端协议栈模块指示物理层模块与切换目标小区建立 物理信道;
物理层模块, 设置为释放与当前小区的物理信道, 并将释放结果通知所 述终端协议栈模块; 同步切换目标小区, 并向终端协议栈模块反馈同步确认 消息; 根据所述切换目标小区的系统消息驻留到切换目标小区, 向终端协议 栈模块反馈驻留确认消息; 根据所述切换请求消息包含的参数和当前存储的 TA值判断 PS切换是否继续, 并将判断结果发送至终端协议栈模块; 与切换 目标小区建立物理信道;
上述物理层模块可通过下述步骤完成根据切换请求消息包含的参数和当 前存储的 TA值判断 PS切换的:
所述物理层模块, 设置为当切换类型为异步切换时, 继续 PS切换; 当切 换类型为同步切换时,继续判断当前存储的 TA值是否超出了 TA值范围, 若 当前存储的 TA值没有超出 TA值范围, 则继续 PS切换; 若当前存储的 TA 值超出 TA值范围, 则终止 PS切换。
如果终端协议栈模块向物理层模块发送的切换请求消息中还包括是否允 许 TA值超范围的标识, 可对上述物理层模块根据切换请求消息包含的参数 和当前存储的 TA值判断 PS切换的步骤作适当改变, 如下:
所述物理层模块, 还设置为当切换类型为同步切换时, 先判断是否允许 TA值超范围, 若允许 TA值超范围, 则继续 PS切换; 若不允许 TA值超范 围, 再判断当前存储的 TA值是否超出了 TA值范围, 若当前存储的 TA值没 有超出 TA值范围, 则继续 PS切换; 若当前存储的 TA值超出 TA值范围, 则终止 PS切换。
上述物理层模块当前存储的 TA值等于所述终端协议栈模块通过所述切 换请求消息发送给物理层模块的 TA值;当所述切换请求消息中不包含 TA值 时, 所述物理层模块当前存储的 TA值等于 1。
如果上述终端协议栈模块从物理层模块接收到的判断结果为终止 PS切 换, 该终端协议栈模块还设置为按照终端在切换源小区的 TA值和功率控制 参数重新配置物理层模块。
该终端在切换源小区的 TA值和功率控制参数可由物理层模块在释放与 当前小区的物理信道的同时上报终端协议栈模块保存; 终端协议栈模块可按 照保存的所述物理层模块上 "^的当前小区的 TA值和功率控制参数配置所述 物理层模块。
本领域普通技术人员可以理解上述方法中的全部或部分步骤可通过程序 来指令相关硬件完成, 所述程序可以存储于计算机可读存储介质中, 如只读 存储器、 磁盘或光盘等。 可选地, 上述实施例的全部或部分步骤也可以使用 一个或多个集成电路来实现, 相应地, 上述实施例中的各模块 /单元可以釆用 硬件的形式实现, 也可以釆用软件功能模块的形式实现。 本发明不限制于任 何特定形式的硬件和软件的结合。
需要说明的是, 本发明还可有其他多种实施例, 在不背离本发明精神及 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。
工业实用性
上述终端实现小区切换的技术方案釆用了与现有终端实现小区重选流程 相似的物理层与切换目标小区进行同步、 与切换目标小区进行驻留等操作, 使得本申请的小区切换流程可以利用现有的小区重选平台, 对现有终端通信 流程改变较小, 实现方便; 另外为保证切换对用户无感知, 上述技术方案终 端与切换目标小区进行驻留操作所需的切换目标小区的系统消息不需要终端 与切换目标小区进行交互获得, 减少了驻留时间, 同时上述技术方案增加的 终端内部的切换请求流程, 占用的时间均为毫秒级时间, 由此造成的时间延 迟对用户无感知。

Claims

权 利 要 求 书
1、 一种分组交换(PS )域切换的方法,用于 GSM终端,所述方法包括: 终端协议栈接收到来自网络侧的切换命令后, 通知物理层释放与当前小 区的物理信道;
所述终端协议栈向所述物理层发送同步请求消息, 指示所述物理层同步 切换目标小区;
所述终端协议栈待收到来自所述物理层的同步确认消息后, 向所述物理 层发送驻留请求消息 , 所述驻留请求消息中携带来自所述网络侧的所述切换 目标小区的系统消息;
所述物理层根据该切换目标小区的系统消息驻留到所述切换目标小区 后, 向所述终端协议栈反馈驻留确认消息;
所述终端协议栈待收到所述物理层发送的驻留确认消息后, 向所述物理 层发送切换请求消息, 该切换请求消息包含切换类型和时间提前量(TA )值 范围;
所述物理层根据所述切换请求消息包含的参数和当前存储的 TA值判断
PS切换是否继续, 并将判断结果发送至所述终端协议栈;
当所述判断结果为继续 PS切换时,终端协议栈指示所述物理层与所述切 换目标小区建立物理信道。
2、 如权利要求 1所述的方法, 其中,
所述物理层根据所述切换请求消息包含的参数和当前存储的 TA值判断
PS切换是否继续的步骤包括:
若切换类型为异步切换, 则继续 PS切换;
若切换类型为同步切换,则判断当前存储的 TA值是否超出了 TA值范围, 若当前存储的 TA值没有超出 TA值范围,则继续 PS切换;若当前存储的 TA 值超出 TA值范围, 则终止 PS切换。
3、 如权利要求 1所述的方法, 其中:
所述切换请求消息还包含是否允许 TA值超范围标识; 所述物理层根据所述切换请求消息包含的参数和当前存储的 TA值判断 PS切换是否继续的步骤包括:
若切换类型为异步切换, 则继续 PS切换;
若切换类型为同步切换,判断是否允许 TA值超范围,若允许 TA值超范 围, 则继续 PS切换; 若不允许 TA值超范围, 再判断当前存储的 TA值是否 超出了 TA值范围, 若当前存储的 TA值没有超出 TA值范围, 则继续 PS切 换; 若当前存储的 TA值超出 TA值范围, 则终止 PS切换。
4、 如权利要求 2或 3所述的方法, 其中,
所述物理层当前存储的 TA值等于所述终端协议栈通过所述切换请求消 息发送给所述物理层的 TA值;
当所述切换请求消息中不包含 TA值时,所述物理层当前存储的 TA值等 于 1。
5、 如权利要求 1所述的方法, 其中, 当所述判断结果为终止 PS切换时, 所述方法还包括:
所述终端协议栈按照终端在切换源小区的 TA值和功率控制参数重新配 置物理层。
6、 如权利要求 5所述的方法, 其还包括:
所述物理层接收所述终端协议栈的通知释放与当前小区的物理信道, 同 时将当前小区的 TA值和功率控制参数上 所述终端协议栈; 所述终端协议 栈保存当前小区的 TA值和功率控制参数;
当所述判断结果为终止 PS切换时, 所述终端协议栈是按照保存的 TA值 和功率控制参数配置所述物理层。
7、 一种分组交换(PS )域切换的系统, 用于 GSM终端, 所述系统包括 终端协议栈模块和物理层模块, 其中,
所述终端协议栈模块设置为: 接收到来自网络侧的切换命令后, 通知物 理层模块释放与当前小区的物理信道; 以及获知物理层模块释放与当前小区 的物理信道后, 向物理层模块发送同步请求消息, 指示物理层模块同步切换 目标小区; 收到来自物理层模块的同步确认消息后, 向所述物理层模块发送 驻留请求消息, 所述驻留请求消息中携带来自网络侧的所述切换目标小区的 系统消息; 接收物理层模块反馈的驻留确认消息; 收到物理层模块发送的驻 留确认消息后, 向物理层模块发送切换请求消息, 该切换请求消息包含切换 类型和时间提前量(TA )值范围; 接收物理层模块反馈的切换是否继续的判 断结果, 并在判断结果为继续 PS切换时, 终端协议栈模块指示物理层模块与 切换目标小区建立物理信道;
所述物理层模块设置为: 释放与当前小区的物理信道, 并将释放结果通 知所述终端协议栈模块; 同步切换目标小区, 并向终端协议栈模块反馈同步 确认消息; 根据所述切换目标小区的系统消息驻留到切换目标小区, 向终端 协议栈模块反馈驻留确认消息; 根据所述切换请求消息包含的参数和当前存 储的 TA值判断 PS切换是否继续, 并将判断结果发送至终端协议栈模块; 与 切换目标小区建立物理信道。
8、 如权利要求 7所述的系统, 其中, 所述物理层模块是设置为以如下方 式根据所述切换请求消息包含的参数和当前存储的 TA值判断 PS切换是否继 续:
当切换类型为异步切换时, 继续 PS切换; 当切换类型为同步切换时, 继 续判断当前存储的 TA值是否超出了 TA值范围, 若当前存储的 TA值没有超 出 TA值范围, 则继续 PS切换; 若当前存储的 TA值超出 TA值范围, 则终 止 PS切换。
9、 如权利要求 7所述的系统, 其中,
所述终端协议栈模块还设置为在向物理层模块发送的切换请求消息中包 含是否允许 TA值超范围的标识 ;
所述物理层模块是设置为以如下方式根据所述切换请求消息包含的参数 和当前存储的 TA值判断 PS切换是否继续: 当切换类型为异步切换时, 继续 PS切换; 当切换类型为同步切换时, 先判断是否允许 TA值超范围, 若允许 TA值超范围, 则继续 PS切换; 若不允许 TA值超范围, 再判断当前存储的 TA值是否超出了 TA值范围, 若当前存储的 TA值没有超出 TA值范围, 则 继续 PS切换; 若当前存储的 TA值超出 TA值范围, 则终止 PS切换。
10、 如权利要求 8或 9所述的系统, 其中,
物理层模块当前存储的 TA值等于所述终端协议栈模块通过所述切换请 求消息发送给物理层模块的 TA值;
当所述切换请求消息中不包含 TA值时, 所述物理层模块当前存储的 TA 值等于 1。
11、 如权利要求 7所述的系统, 其中,
所述终端协议栈模块还设置为当所述判断结果为终止 PS切换时,按照终 端在切换源小区的 TA值和功率控制参数重新配置物理层模块。
12、 如权利要求 11所述的系统, 其中,
所述物理层模块还设置为在释放与当前小区的物理信道的同时, 将当前 小区的 TA值和功率控制参数上报所述终端协议栈模块;
所述终端协议栈模块还设置为: 保存所述物理层模块上报的当前小区的 TA值和功率控制参数, 以及按照该保存的 TA值和功率控制参数配置所述物 理层模块。
13、 一种 GSM终端, 其包括如权利要求 7-12任一项所述的系统。
PCT/CN2012/077696 2012-04-09 2012-06-28 用于gsm终端分组交换域切换的方法和系统 WO2013152564A1 (zh)

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