WO2012083758A1 - 引导终端驻留的方法及接入网设备 - Google Patents

引导终端驻留的方法及接入网设备 Download PDF

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Publication number
WO2012083758A1
WO2012083758A1 PCT/CN2011/081467 CN2011081467W WO2012083758A1 WO 2012083758 A1 WO2012083758 A1 WO 2012083758A1 CN 2011081467 W CN2011081467 W CN 2011081467W WO 2012083758 A1 WO2012083758 A1 WO 2012083758A1
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Prior art keywords
terminal
network
frequency
inter
carrier frequency
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PCT/CN2011/081467
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English (en)
French (fr)
Inventor
陈林
崔亚蕾
任远
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华为技术有限公司
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Publication of WO2012083758A1 publication Critical patent/WO2012083758A1/zh

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    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W36/00—Hand-off or reselection arrangements
    • H04W36/24—Reselection being triggered by specific parameters
    • H04W36/30—Reselection being triggered by specific parameters by measured or perceived connection quality data
    • H04W36/302—Reselection being triggered by specific parameters by measured or perceived connection quality data due to low signal strength
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W36/00—Hand-off or reselection arrangements
    • H04W36/24—Reselection being triggered by specific parameters
    • H04W36/30—Reselection being triggered by specific parameters by measured or perceived connection quality data
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W48/00—Access restriction; Network selection; Access point selection
    • H04W48/18—Selecting a network or a communication service

Definitions

  • Embodiments of the present invention relate to communication technologies, and in particular, to a method for guiding a terminal to camp and an access network device.
  • CDMA2000 IxEV-DO As an evolution technology of CDMA2000 IX from 2G to 3G, CDMA2000 IxEV-DO has greatly improved its pre/reverse rate, Quality of Service (QoS) guarantee function and system capacity.
  • An indoor coverage system represented by a microcell/millicell is usually covered by a 3G network such as CDMA2000 IxEV-DO
  • an outdoor coverage system represented by a macrocell is usually covered by a 2G network such as CDMA2000 lx. If the indoor coverage system and the outdoor coverage system use the same frequency coverage, the user data service experience is poor due to mutual interference and frequent switching. Therefore, the indoor coverage system and the outdoor coverage system preferably use different frequency coverage. Inter-frequency coverage can effectively overcome the mutual interference between the indoor coverage system and the outdoor coverage system, and the user can obtain a good air interface quality, thereby greatly increasing the data service rate.
  • a dual-mode terminal is a working mode in which the source network can work in the source network, and A terminal that works in the target network to work in the target network. For example, you can
  • a terminal operating under a CDMA2000 lx network and operating under a CDMA2000 lxEV-DO network can be referred to as a 2G/3G dual mode terminal.
  • the dual-mode terminal enters the indoor coverage system from the outdoor coverage system, if it wants to access the network, since the indoor coverage system adopts the inter-frequency scheme, there is no co-channel interference of the outdoor base station, so even if the forward direction is receiving signal power (Rx) At lower times, a good signal-to-noise ratio is also guaranteed. At this time, the terminal tends to have insufficient transmission signal power (Tx) due to the blockage of the building wall, so there is a problem of front/reverse imbalance.
  • the dual-mode terminal may fail to access or drop the call, and the dual-mode terminal may fail to capture the EV-DO system caused by the redirection failure. And other issues.
  • Embodiments of the present invention provide a method for guiding a terminal to camp and an access network device, which are used to circumvent the front-end reverse unbalance to boot the terminal to the target network, so that the terminal can reliably reside in the terminal. In the target network.
  • an embodiment of the present invention provides a method for guiding a terminal to reside.
  • the terminal is in a common coverage area of a source network and a target network, and includes:
  • an embodiment of the present invention further provides an access network device, which provides a source network and a target.
  • Network services including:
  • a transceiver module configured to receive a signal quality of the inter-frequency carrier of the source network searched by the terminal at the power-on registration frequency point;
  • a switching test module configured to switch the terminal to an inter-frequency carrier frequency of the source network, if the signal quality of the inter-frequency carrier frequency of the source network meets a handover condition, and measure the terminal in the source network Forward link quality and reverse link quality on the inter-frequency carrier frequency;
  • a redirection module configured to redirect the terminal to a target network if the forward link shield and reverse link quality of the terminal on the inter-frequency carrier frequency of the source network meet a redirection condition
  • the carrier frequency is such that the terminal resides on the inter-frequency carrier frequency of the target network.
  • the method for guiding a terminal to camp and the access network device in the embodiment of the present invention by switching the terminal to an inter-frequency carrier frequency of the power-on registration frequency point in the source network whose signal quality meets the switching condition, the inter-frequency carrier frequency in the source network
  • the pre/reverse link quality is measured. If the pre/reverse link shield condition satisfies the condition, the terminal is redirected to the inter-frequency carrier frequency of the target network, effectively avoiding the pre/reverse link quality. When the condition is not met, the terminal is redirected to the different frequency carrier frequency of the target network.
  • FIG. 1 is a flowchart of a method for guiding a terminal to reside according to an embodiment of the present invention
  • FIG. 2 is a flowchart of a method for guiding a terminal to reside according to another embodiment of the present invention
  • FIG. 3 is a flowchart of still another embodiment of the present invention. Schematic diagram of network frequency distribution
  • FIG. 4 is a schematic structural diagram of an access network device according to an embodiment of the present invention.
  • the technical solutions in the embodiments of the present invention are clearly and completely described in the following with reference to the accompanying drawings in the embodiments of the present invention.
  • the embodiments are a part of the embodiments of the invention, and not all of the embodiments. All other embodiments obtained by those skilled in the art based on the embodiments of the present invention without creative efforts are within the scope of the present invention.
  • FIG. 1 is a flowchart of a method for guiding a terminal to reside according to an embodiment of the present invention. As shown in FIG. 1, the method includes:
  • Step 101 The access network device receives the signal quality of the different frequency carrier frequency of the source network that is searched by the terminal at the power-on registration frequency point;
  • the access network device provides services of the source network and the target network at the same time, and the terminal is in a common coverage area of the source network and the target network.
  • the terminal is a multi-mode working terminal, which works in the working mode of the source network in the source network and works in the working mode of the target network in the target network.
  • a 2G/3G dual-mode terminal operating on both a CDMA2000 lx network and a CDMA2000 lxEV-DO network.
  • Step 102 If the received signal quality of the inter-frequency carrier frequency of the source network satisfies the handover condition, the access network device switches the terminal to the inter-frequency carrier frequency of the source network, and measures the inter-frequency of the terminal in the source network. Forward link quality and reverse link quality on the carrier frequency;
  • the foregoing handover may be a hard handover, and the hard handover refers to handover between base stations or coverage cells of different frequencies.
  • the process of switching is that the terminal temporarily disconnects the call, transmits the signaling of the handover on the channel in contact with the original base station, and the terminal automatically tunes to the new frequency, contacts the new base station, establishes a new channel, and completes the handover. the process of. Simply put, "disconnect first, then switch,,.
  • Step 103 If the terminal is on the inter-frequency carrier frequency of the source network and the reverse link The quality meets the redirection condition, and the terminal is redirected to the inter-frequency carrier frequency of the target network, so that the terminal resides on the inter-frequency carrier frequency of the target network.
  • An embodiment of the present invention provides a method for guiding a terminal to camp on a different frequency carrier frequency of a source network by switching the terminal to an inter-frequency carrier frequency of a power-on registration frequency point in a source network whose signal quality meets a handover condition.
  • Pre/reverse link shield if the pre/reverse link quality meets the condition, the terminal is redirected to the inter-frequency carrier frequency of the target network, effectively avoiding the pre/reverse link quality being unsatisfied
  • the condition is redirected to the inter-frequency carrier frequency of the target network.
  • FIG. 2 is a flow chart of a method for guiding a terminal to reside according to another embodiment of the present invention.
  • the source network is CDMA2000 lx and the target network is CDMA2000 lxEV-DO as an example.
  • the application scenario of this method is set as the dual-mode terminal enters the indoor from the outdoor, the indoor area and the outdoor area cover the active network and the target network, and the indoor area and the outdoor area of the source network are covered by different frequencies, and the target network omits the deployment. The same frequency carrier frequency in the room. As shown in FIG.
  • F1 is CDMA2000 lx belongs to the same frequency carrier frequency of the outdoor area, and the same frequency in the indoor area can be used as the pilot beacon guiding terminal to switch from F1 to F2.
  • F2 is CDMA2000 lx belongs to the inter-frequency carrier frequency of indoor area
  • F3 is CDMA2000 lx EV-DO belongs to the inter-frequency carrier frequency of indoor area, omitting CDMA 2000 lx EV-DO belongs to the same frequency carrier frequency of indoor area, saving EV- DO beacon cost.
  • the method includes:
  • Step 201 The lx/EV-DO dual-mode data card terminal enters the indoors from the outside, and is powered on, and sends a boot registration request message to the access network device at the boot registration frequency F1;
  • Step 202 The access network device receives the foregoing power-on registration request message, sends a registration response message to the terminal, allows the terminal to access the network, and works on the power-on registration frequency point;
  • Step 203 The terminal receives the registration response message sent by the access network device, initiates an lx test call at the power-on registration frequency, and measures the signal quality of the lx inter-frequency carrier frequency F2 in the indoor through the inter-frequency search;
  • the flag lx customarily refers to CDMA2000 using a pair of 1.25MHz radio channels. wireless technology.
  • the lx test call can include, for example, Enhanced Variable Rate Codec (ECRC), or Test Data Service Option (TDSO), or Loop Response (Loop- ack).
  • ECRC Enhanced Variable Rate Codec
  • TDSO Test Data Service Option
  • Loop- ack Loop Response
  • Step 204 The terminal continuously measures the signal shield of the lx inter-frequency carrier F2, and reports the search report to the access network device.
  • Step 205 The access network device determines whether the signal quality of the lx inter-frequency carrier frequency F2 meets the switching condition.
  • step 206 If the signal quality of the lx inter-frequency carrier frequency F2 reaches a preset threshold, that is, the lx inter-frequency carrier frequency satisfies the switching condition, step 206 is performed;
  • the signal quality of the lx inter-frequency carrier F2 does not reach the preset threshold, that is, the lx inter-frequency carrier does not satisfy the handover condition, and the lx test call is released.
  • Step 206 The access network device switches the terminal to the lx inter-frequency carrier frequency F2.
  • Step 207 The terminal performs a test call on the lx inter-frequency carrier frequency F2.
  • Step 208 The access network device continuously measures the forward link quality and the reverse link quality of the terminal at the lx inter-frequency carrier frequency F2;
  • step 209 is performed; if the forward link quality and the reverse link quality do not satisfy the redirection condition, the process ends.
  • the front/reverse link quality can be measured by chip energy/interference spectrum density (Chip Energy/Other cell Interfere, the tube is called: Ec/Io), and the frame error rate (referred to as: FER)
  • Chip Energy/Other cell Interfere the tube is called: Ec/Io
  • FER frame error rate
  • PER Packet Error Rate
  • Rx Tx the frame error rate
  • Step 209 The access network device redirects the terminal to the lx inter-frequency carrier frequency F2, and releases the l test call.
  • the access network device needs to redirect the terminal to Lx different frequency carrier frequency F2.
  • Step 210 The terminal camps on the lx inter-frequency carrier frequency F2, and initiates a registration request.
  • the registration request may be a location area based registration request, or may be a subnet based registration request or the like. Such registration requests have different names in different networks.
  • Step 211 The access network device receives the registration request sent by the terminal, sends a redirect message of the EV-DO network to the terminal, redirects the terminal to the indoor EV-DO inter-frequency carrier frequency F3, and releases the EV-DO call.
  • the terminal completes the camp on the EV-DO inter-frequency carrier frequency F3.
  • the present embodiment only uses the source network as CDMA2000 lx and the target network as CDMA2000 lxEV-DO as an example, in fact, when the source network is CDMA2000 lxEV-DO and the target network is CDMA2000 lx,
  • the terminal camping can be guided by referring to the method provided by the embodiment of the present invention.
  • An embodiment of the present invention provides a method for guiding a terminal to camp on a different frequency carrier frequency of a source network by switching the terminal to an inter-frequency carrier frequency of a power-on registration frequency point in a source network whose signal quality meets a handover condition.
  • Pre/reverse link shield and according to the measurement result, whether to redirect the terminal to the inter-frequency carrier frequency of the target network, so that the terminal can camp on the inter-frequency carrier frequency of the target network, effectively avoiding
  • the terminal redirects to the problem of terminal access failure or dropped calls caused by the inter-frequency carrier frequency of the front/reverse unbalanced target network.
  • FIG. 4 is a structural diagram of an access network device according to an embodiment of the present invention.
  • the access network device includes: a transceiver module 401, a handover test module 402, and a redirection module 403.
  • the transceiver module 401 is configured to receive a signal quality of the inter-frequency carrier frequency of the source network that is searched by the terminal at the power-on registration frequency point.
  • the handover test module 402 is configured to: if the signal quality of the inter-frequency carrier frequency of the source network meets the handover condition, Switching the terminal to the inter-frequency carrier frequency of the source network, and measuring the forward link quality and reverse link quality of the terminal on the inter-frequency carrier frequency of the source network; the redirection module 403 is configured to: if the terminal is in the source network The forward link quality and the reverse link quality on the different frequency carrier frequency satisfy the redirection condition, and the terminal is redirected to the inter-frequency carrier frequency of the target network, so that the terminal is on the different frequency carrier frequency of the target network. Resident.
  • the transceiver module 401 is further configured to: receive a power-on registration request message sent by the terminal on the power-on registration frequency, and send a registration response message to the terminal, so that the terminal searches for the source network on the power-on registration frequency point.
  • the redirection module 403 is further configured to: redirect the terminal to the inter-frequency carrier frequency of the target network to cause the terminal to camp on the inter-frequency carrier frequency of the target network;
  • the transceiver module 401 is further configured to: : receiving the registration request sent by the terminal, and sending a redirect message of the target network to the terminal.
  • the source network is a CDMA2000 lx network, and the target network is a CDMA2000 lxEV-DO network; or the source network is a CDMA2000 lxEV-DO network, and the target network is a CDMA2000 lx network.
  • An embodiment of the present invention provides an access network device, which is configured to switch to a different frequency carrier frequency of a power-on registration frequency point in a source network whose signal quality meets a switching condition, and before measuring on a different frequency carrier frequency of the source network.
  • Reverse link quality if the pre/reverse link quality meets the condition, the terminal is redirected to the inter-frequency carrier frequency of the target network, effectively avoiding the condition that the pre/reverse link quality does not satisfy the condition.
  • the terminal is redirected to the inter-frequency carrier frequency of the target network.
  • the device embodiments described above are merely illustrative, wherein the units illustrated as separate components may or may not be physically separate, and the components displayed as units may or may not be physical units, ie may be located in one place. , or it can be distributed to at least two network elements. Some or all of the modules may be selected according to actual needs to achieve the purpose of the solution of the embodiment. Those of ordinary skill in the art can understand and implement without paying creative labor.

Description

？ ]导终端驻留的方法及接入网设备
本申请要求于 2010 年 12 月 23 日提交中国专利局、 申请号为 201010603371. 0、 发明名称为 "引导终端驻留的方法及接入网设备" 的中 国专利申请的优先权， 其全部内容通过引用结合在本申请中。 技术领域 本发明实施例涉及通信技术， 尤其涉及一种引导终端驻留的方法及接 入网设备。
背景技术 目前， 城市中心的商业和住宅区域， 移动通信的普及率^高， 以写字 楼和住宅小区为代表的楼宇建筑， 用户对于语音和数据的移动业务的需求 更加旺盛。 利用宏蜂窝和微蜂窝结合的网络覆盖结构， 具有更好的适应能 力， 能够为用户提供更好的使用感受。
CDMA2000 IxEV-DO作为 CDMA2000 IX从 2G到 3G的演进技术， 其前 /反向速率、 服务质量（ Quality Of Service， 简称为： QoS )保障功能、 系统容量都得到了极大的提升。 以微蜂窝 /毫蜂窝为代表的室内覆盖系统通 常会使用 CDMA2000 IxEV-DO这种 3G网络进行覆盖， 而以宏蜂窝为代表 的室外覆盖系统通常会使用 CDMA2000 lx这种 2G网络进行覆盖。 如果室 内覆盖系统与室外覆盖系统采用同频覆盖， 会由于相互之间的干扰以及频 繁的切换而使得用户数据业务体验较差， 因此， 室内覆盖系统与室外覆盖 系统优选采用异频覆盖。 异频覆盖可以有效克服室内覆盖系统与室外覆盖 系统的相互间的干扰， 用户可以获得很好的空口质量， 从而大大提高数据 业务速率。
双模终端是一种既可以工作在源网络以源网络的工作模式工作， 又可 以工作在目标网络以目标网络的工作模式工作的终端。 例如既可以在
CDMA2000 lx网络下工作、 又可以在 CDMA2000 lxEV-DO网络下工作的 终端可以称之为 2G/3G双模终端。
当双模终端从室外覆盖系统进入室内覆盖系统时，如果希望接入网络， 由于在室内覆盖系统采用异频方案， 没有了室外基站的同频干扰， 因此即 使前向在接收信号功率 （Rx )较低时， 也能保证很好的信噪比。 而此时终 端往往会由于建筑物墙面的阻挡而出现发射信号功率 （Tx ) 不足， 因此会 出现前 /反向不平衡的问题。如果将双模终端重定向到前 /反向不平衡的异频 载频上， 会造成双模终端接入失败或者掉话等问题， 以及重定向失败造成 的双模终端捕获 EV-DO系统失败等问题。
发明内容 本发明实施例提供一种引导终端驻留的方法和接入网络设备， 用以规 避在前 /反向不平衡时将终端引导驻留到目标网络中， 可以使得终端可靠地 驻留到目标网络中。
一方面， 本发明实施例提供一种引导终端驻留的方法， 所述终端处于 源网络及目标网络的共同覆盖区域， 包括：
接收终端在开机登记频点上搜索到的源网络的异频载频的信号盾量； 如果所述源网络的异频载频的信号质量满足切换条件， 将所述终端切 换到所述源网络的异频载频上， 并测量所述终端在所述源网络的异频载频 上的前向链路盾量及反向链路质量；
如果所述终端在所述源网络的异频载频上的前向链路质量及反向链路 质量满足重定向条件， 将所述终端重定向到目标网络的异频载频上， 以使 所述终端在所述目标网络的异频载频上驻留。
另一方面， 本发明实施例还提供一种接入网设备， 提供源网络及目标 网络的服务， 包括：
收发模块， 用于接收终端在开机登记频点上搜索到的源网络的异频载 频的信号质量；
切换测试模块， 用于如果所述源网络的异频载频的信号质量满足切换 条件， 将所述终端切换到所述源网络的异频载频上， 并测量所述终端在所 述源网络的异频载频上的前向链路质量及反向链路质量；
重定向模块， 用于如果所述终端在所述源网络的异频载频上的前向链 路盾量及反向链路质量满足重定向条件， 将所述终端重定向到目标网络的 异频载频上， 以使所述终端在所述目标网络的异频载频上驻留。
本发明实施例的引导终端驻留的方法和接入网设备， 通过将终端切换 到信号质量满足切换条件的源网络中开机登记频点的异频载频上， 在源网 络的异频载频上测量前 /反向链路质量， 如果前 /反向链路盾量满足条件， 才 将终端重定向到目标网络的异频载频上驻留， 有效避免了在前 /反向链路质 量不满足条件时将终端重定向到目标网络的异频载频上。
附图说明 为了更清楚地说明本发明实施例或现有技术中的技术方案， 下面将对 实施例或现有技术描述中所需要使用的附图作一筒单地介绍， 显而易见地， 下面描述中的附图是本发明的一些实施例， 对于本领域普通技术人负来讲， 在不付出创造性劳动的前提下， 还可以根据这些附图获得其他的附图。
图 1为本发明一个实施例提供的引导终端驻留的方法流程图； 图 2为本发明又一个实施例提供的引导终端驻留的方法交互流程图； 图 3为本发明又一个实施例提供的网络频率分布示意图；
图 4为本发明一个实施例提供的接入网设备的结构示意图。 具体实施方式 为使本发明实施例的目的、 技术方案和优点更加清楚， 下面将结合本 发明实施例中的附图， 对本发明实施例中的技术方案进行清楚、 完整地描 述， 显然， 所描述的实施例是本发明一部分实施例， 而不是全部的实施例。 基于本发明中的实施例， 本领域普通技术人员在没有作出创造性劳动前提 下所获得的所有其他实施例， 都属于本发明保护的范围。
在本实施例提供的网络环境中， 同时存在两种工作模式的网络， 分别 称之为源网络和目标网络。 源网络存在与开机登记频点同频的载频， 以及 与开机频点异频的载频。 图 1 为本发明一个实施例提供的引导终端驻留的 方法流程图， 如图 1所示， 该方法包括：
步骤 101 :接入网设备接收终端在开机登记频点上搜索到的源网络的异 频载频的信号质量；
其中， 需要说明的是， 该接入网络设备同时提供源网络和目标网络的 服务， 终端处于源网络及目标网络的共同覆盖区域。 终端为多模式工作终 端， 该终端在源网络中以源网络的工作模式工作， 在目标网络中以目标网 络的工作模式工作。 例如， 同时工作在 CDMA2000 lx网络和 CDMA2000 lxEV-DO网络的 2G/3G双模终端。
步骤 102: 如果接收到的源网络的异频载频的信号质量满足切换条件， 接入网设备将终端切换到上述源网络的异频载频上， 并测量该终端在上述 源网络的异频载频上的前向链路质量及反向链路质量；
其中， 上述切换可以为硬切换， 硬切换是指在不同频率的基站或覆盖 小区之间的切换。 这种切换的过程是终端先暂时断开通话， 在与原基站联 系的信道上， 传送切换的信令， 终端自动向新的频率调谐， 与新的基站联 系， 建立新的信道， 从而完成切换的过程。 简单来说就是 "先断开、 后切 换，， 。
步骤 103:如果终端在源网络的异频载频上的前向链路质量及反向链路 质量均满足重定向条件， 将终端重定向到目标网络的异频载频上， 以使该 终端在目标网络的异频载频上驻留。
本发明实施例提供了一种引导终端驻留的方法， 通过将终端切换到信 号质量满足切换条件的源网络中开机登记频点的异频载频上， 在源网络的 异频载频上测量前 /反向链路盾量， 如果前 /反向链路质量满足条件， 才将终 端重定向到目标网络的异频载频上驻留， 有效避免了在前 /反向链路质量不 满足条件时将终端重定向到目标网络的异频载频上。
图 2 为本发明又一个实施例提供的引导终端驻留的方法交互流程图。 在本实施例中， 以源网络为 CDMA2000 lx , 目标网络为 CDMA2000 lxEV-DO为例进行说明。 将此方法的应用场景设定为双模终端从室外进入 室内， 室内区域及室外区域均覆盖有源网络和目标网络， 源网络的室内区 域与室外区域釆用异频覆盖， 目标网络省略了部署室内的同频载频。 如图 3 所示的本实施例提供的网络频率分布示意图， F1为 CDMA2000 lx属于室 外区域的同频载频， 处于室内区域的同频可以作为导频信标引导终端从 F1 切换到 F2。F2为 CDMA2000 lx属于室内区域的异频载频， F3为 CDMA2000 lx EV-DO属于室内区域的异频载频， 省略了 CDMA 2000 lx EV-DO属于 室内区域的同频载频， 节省了 EV-DO的信标成本。 如图 2所示， 该方法包 括：
步骤 201 : lx/EV-DO双模数据卡终端从室外进入室内， 开机， 在开机 登记频点 F1上向接入网设备发送开机登记请求消息；
步骤 202: 接入网设备接收到上述开机登记请求消息， 发送登记响应消 息给终端， 允许该终端接入网络， 并在其开机登记频点上工作；
步骤 203: 终端接收到接入网设备发送的登记响应消息， 在开机登记频 点上发起 lx测试呼叫， 通过异频搜索测量室内的 lx异频载频 F2的信号质 量；
其中， 标志 lx习惯上指使用一对 1.25MHz无线电信道的 CDMA2000 无线技术。 lx测试呼叫可以包含如增强型变速率编解码（ Enhanced Variable Rate Codec, 筒称为： EVRC ) ， 或者测试数据服务选项 （ Test Data Service Option, 简称为： TDSO ) 、 或者回路响应 （Loop— ack )等多种测试呼叫类 型， 此处不做具体限定。
步骤 204: 终端不断测量 lx异频载频 F2的信号盾量， 并向接入网设备 上报搜索报告；
步骤 205:接入网设备判断 lx异频载频 F2的信号质量是否满足切换条 件；
如果 lx异频载频 F2的信号质量达到预设的门限值， 即 lx异频载频满 足切换条件， 执行步骤 206;
如果 lx异频载频 F2的信号质量没有达到预设的门限值， 即 lx异频载 频不满足切换条件， 释放 lx测试呼叫。
步骤 206: 接入网设备将终端切换到 lx异频载频 F2上；
步骤 207: 终端在 lx异频载频 F2进行测试呼叫；
步骤 208:接入网设备持续测量终端在 lx异频载频 F2前向链路质量及 反向链路质量；
如果前向链路质量及反向链路质量满足重定向条件， 执行步骤 209; 如果前向链路质量及反向链路质量不满足重定向条件， 结束。
其中， 前 /反向链路质量可以通过测量码片能量 /干扰谱密度 （Chip Energy/Other cell Interfere, 筒称为： Ec/Io ) , 误†贞率 ( Frame Error Rate, 简称为： FER ) , 误包率（Packet Error Rate, 简称为 PER ) , Rx Tx等信息 中的一个或多个， 但可以不限于这些信息。
步骤 209: 接入网络设备将终端重定向到 lx异频载频 F2上， 并释放该 l 测试呼叫；
其中， 因为测试呼叫并不能使终端稳定在 F2上， 所以， 为了令终端可 以在 lx异频载频 F2上实现稳定的驻留， 接入网络设备要将终端重定向到 lx异频载频 F2上。
步骤 210: 终端在 lx异频载频 F2上驻留， 发起登记请求；
所述登记请求可以是基于位置区的登记请求， 还可以是基于子网的登 记请求等。 在不同的网络中这种登记请求有不同的名称。
步骤 211 : 接入网设备接收到终端发送的登记请求， 发送 EV-DO网络 的重定向消息给终端， 将终端重定向室内 EV-DO异频载频 F3上， 并释放 该 EV-DO呼叫， 终端在 EV-DO异频载频 F3上完成驻留。
需要说明的是， 虽然本实施例仅以源网络为 CDMA2000 lx, 目标网络 为 CDMA2000 lxEV-DO 为例进行了说明， 事实上源网络为 CDMA2000 lxEV-DO, 目标网络为 CDMA2000 lx的情况下，也可以参照本发明实施例 提供的方法引导终端驻留。
本发明实施例提供了一种引导终端驻留的方法， 通过将终端切换到信 号质量满足切换条件的源网络中开机登记频点的异频载频上， 在源网络的 异频载频上测量前 /反向链路盾量， 并根据测量结果决定是否将终端重定向 到目标网络的异频载频上， 以使得该终端可以在目标网络的异频载频上驻 留， 有效避免了将终端重定向到前 /反向不平衡的目标网络的异频载频上所 造成的终端接入失败或者掉话等问题。
图 4为本发明一个实施例提供的接入网设备的结构视图， 如图 4所示， 该接入网设备包括：收发模块 401，切换测试模块 402以及重定向模块 403。 其中， 收发模块 401 用于接收终端在开机登记频点上搜索到的源网络的异 频载频的信号质量； 切换测试模块 402用于如果源网络的异频载频的信号 质量满足切换条件， 将该终端切换到源网络的异频载频上， 并测量终端在 源网络的异频载频上的前向链路质量及反向链路质量； 重定向模块 403 用 于如果终端在源网络的异频载频上的前向链路质量及反向链路质量满足重 定向条件， 将终端重定向到目标网络的异频载频上， 以使该终端在目标网 络的异频载频上驻留。 一种实施方式下， 该收发模块 401 还用于： 接收终端在开机登记频点 上发送的开机登记请求消息， 并发送登记响应消息给终端， 以使终端在开 机登记频点上搜索源网絡的异频载频的信号盾量。
另一种实施方式下， 该重定向模块 403还用于： 将终端重定向到目标 网络的异频载频以使该终端在目标网络的异频载频上驻留； 收发模块 401 还用于： 接收终端发送的登记请求， 向终端发送目标网络的重定向消息。
其中，源网络为 CDMA2000 lx网络，目标网络为 CDMA2000 lxEV-DO 网络； 或者， 源网络为 CDMA2000 lxEV-DO网络， 目标网络为 CDMA2000 lx网络。
本发明实施例提供了一种接入网设备， 通过将终端切换到信号质量满 足切换条件的源网络中开机登记频点的异频载频上， 在源网络的异频载频 上测量前 /反向链路质量， 如果前 /反向链路质量满足条件， 才将终端重定向 到目标网络的异频载频上驻留， 有效避免了在前 /反向链路质量不满足条件 时将终端重定向到目标网络的异频载频上。
本领域普通技术人员可以理解： 实现上述方法实施例的全部或部分步 骤可以通过程序指令相关的硬件来完成， 前述的程序可以存储于一计算机 可读取存储介质中， 该程序在执行时， 执行包括上述方法实施例的步骤； 而前述的存储介质包括： ROM、 RAM, 磁碟或者光盘等各种可以存储程序 代码的介质。
以上所描述的装置实施例仅仅是示意性的， 其中作为分离部件说明的 单元可以是或者也可以不是物理上分开的， 作为单元显示的部件可以是或 者也可以不是物理单元， 即可以位于一个地方， 或者也可以分布到至少两 个网络单元上。 可以根据实际的需要选择其中的部分或者全部模块来实现 本实施例方案的目的。 本领域普通技术人负在不付出创造性的劳动的情况 下， 即可以理解并实施。
最后应说明的是： 以上实施例仅用以说明本发明的技术方案， 而非对 其限制； 尽管参照前述实施例对本发明进行了详细的说明， 本领域的普通 技术人员应当理解： 其依然可以对前述各实施例所记载的技术方案进行修 改， 或者对其中部分技术特征进行等同替换； 而这些修改或者替换， 并不 使相应技术方案的本盾脱离本发明各实施例技术方案的精神和范围。

Claims

权利要求
1、 一种 I导终端驻留的方法， 所述终端处于源网络及目标网络的共同 覆盖区域， 其特征在于， 包括：
接收终端在开机登记频点上搜索到的源网络的异频载频的信号质量； 如果所述源网络的异频载频的信号质量满足切换条件， 将所述终端切 换到所述源网络的异频载频上， 并测量所述终端在所述源网络的异频载频 上的前向链路质量及反向链路质量；
如果所述终端在所述源网络的异频载频上的前向链路质量及反向链路 质量满足重定向条件， 将所述终端重定向到目标网络的异频载频上， 以使 所述终端在所述目标网络的异频载频上驻留。
2、 根据权利要求 1所述的引导终端驻留的方法， 其特征在于， 所述终 端为多模式工作终端， 在所述源网络中以所述源网络的工作模式工作， 在 所述目标网络中以所述目标网络的工作模式工作。
3、 根据权利要求 1或 2所述的引导终端驻留的方法， 其特征在于， 所 述接收终端在开机登记频点上搜索到的源网络的异频载频的信号质量之 前， 所述方法还包括：
接收终端在所述开机登记频点上发送的开机登记请求消息， 并发送登 记响应消息给所述终端， 以使所述终端在所述开机登记频点上搜索所述源 网络的异频载频的信号质量。
4、 根据权利要求 1或 2所述的引导终端驻留的方法， 其特征在于， 所 述将所述终端重定向到目标网絡的异频载频上包括：
将所述终端重定向到所述源网络的异频载频上， 以使所述终端在所述 源网络的异频载频上驻留；
接收所述终端发送的登记请求， 向所述终端发送目标网络的重定向消 息。
5、 根据权利要求 1或 2所述的引导终端驻留的方法， 其特征在于： 所述源网络为 CDMA2000 lx 网絡， 所述目标网絡为 CDMA2000 lxEV-DO网络； 或者，
所述源网络为 CDMA2000 lxEV-DO网络，所述目标网络为 CDMA2000 lx网络。
6、 一种接入网设备， 提供源网络及目标网络的服务， 其特征在于， 包 括：
收发模块， 用于接收终端在开机登记频点上搜索到的源网络的异频载 频的信号质量；
切换测试模块， 用于如果所述源网络的异频载频的信号质量满足切换 条件， 将所述终端切换到所述源网络的异频载频上， 并测量所述终端在所 述源网络的异频载频上的前向链路质量及反向链路质量；
重定向模块， 用于如果所述终端在所述源网络的异频载频上的前向链 路盾量及反向链路盾量满足重定向条件， 将所述终端重定向到目标网络的 异频载频上， 以使所述终端在所述目标网络的异频载频上驻留。
7、 根据权利要求 6所述的接入网设备， 其特征在于， 所述收发模块还 用于： 接收终端在所述开机登记频点上发送的开机登记请求消息， 并发送 登记响应消息给所述终端， 以使所述终端在所述开机登记频点上搜索所述 源网络的异频载频的信号盾量。
8、 根据权利要求 6所述的接入网设备， 其特征在于， 所述重定向模块 还用于： 将所述终端重定向到所述源网络的异频载频上， 以使所述终端在 所述源网络的异频载频上驻留；
所述收发模块还用于： 接收所述终端发送的登记请求， 向所述终端发 送目标网络的重定向消息。
9、 根据权利要求 6所述的接入网设备， 其特征在于：
所述源网络为 CDMA2000 lx 网络， 所述目标网络为 CDMA2000 lxEV-DO网络； 或者，
所述源网络为 CDMA2000 lxEV-DO网络，所述目标网络为 CDMA2000 lx网络。
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