WO2011060657A1 - 一种移动终端及其小区重选方法 - Google Patents

一种移动终端及其小区重选方法 Download PDF

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Publication number
WO2011060657A1
WO2011060657A1 PCT/CN2010/076312 CN2010076312W WO2011060657A1 WO 2011060657 A1 WO2011060657 A1 WO 2011060657A1 CN 2010076312 W CN2010076312 W CN 2010076312W WO 2011060657 A1 WO2011060657 A1 WO 2011060657A1
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Prior art keywords
mobile terminal
cell
threshold
wcdma
reselection
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PCT/CN2010/076312
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English (en)
French (fr)
Inventor
蹇海
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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 US13/510,346 priority Critical patent/US20120231798A1/en
Priority to EP10831073.1A priority patent/EP2503821A4/en
Publication of WO2011060657A1 publication Critical patent/WO2011060657A1/zh

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Classifications

    • 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
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W36/00—Hand-off or reselection arrangements
    • H04W36/14—Reselecting a network or an air interface
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W36/00—Hand-off or reselection arrangements
    • H04W36/14—Reselecting a network or an air interface
    • H04W36/144—Reselecting a network or an air interface over a different radio air interface technology
    • H04W36/1443—Reselecting a network or an air interface over a different radio air interface technology between licensed networks
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W88/00—Devices specially adapted for wireless communication networks, e.g. terminals, base stations or access point devices
    • H04W88/02—Terminal devices
    • H04W88/06—Terminal devices adapted for operation in multiple networks or having at least two operational modes, e.g. multi-mode terminals

Definitions

  • the present invention relates to the field of mobile communication technologies, and in particular, to a mobile terminal and a cell reselection method thereof. Background technique
  • WCDMA Wideband Code Division Multiple Access
  • GSM Global System For Mobile Communication
  • control parameters for reselection from the GSM to the WCDMA cell are sent to the mobile terminal, and the mobile terminal receives these parameters after receiving it.
  • the key parameters are as follows:
  • Fdd_qoffset_present 1 (0x1)
  • FDD — Qoffset 0 (0x0)
  • Tdd_qoffset_present 0 (0x0)
  • Qsearch-I usually takes a value of 7, indicating that as long as the WCDMA cell measurement meets the requirements and unconditionally selects to the WCDMA cell, the operator usually configures this to allow the user to transfer to the WCDMA network as much as possible.
  • the mobile terminal After the mobile terminal camps on the GSM cell, it will continuously measure the surrounding WCDMA cell, and the mobile terminal calculates and judges the measured value according to the requirements of 6.6.5 of 3GPP 45.008. Since Qsearch-I is usually set to 7 (indicating unconditional), the ratio of the energy per chip and the band-limited white noise power density of the code after the spread spectrum is finally determined. ( Received energy per chip divided by the noise spectral density , Ec/No ) and the received signal code power (RSCP) measurement value meets the judgment condition and lasts for more than 5 seconds. If passed, the WCDMA cell selection is initiated. The judgment condition is: Whether the measured value of Ec/No is greater than or equal to FDD—Qmin - FDD—Qmin—Offset; whether the measured value of RSCP is greater than or equal to FDD—RSCP—threshold;
  • the SYSTEM_ INFORMATION_ 2QUATER system message sent by the network side determines the value of FDD—Qmin, FDD—Qmin—Offset, FDD—RSCP—threshold. See 3GPP 45.008 for specific calculations and values.
  • the mobile terminal can register the WCDMA network when it is set to the WCDMA only mode, but in the case of the WCDMA and GSM dual mode, the mobile terminal first resides in the GSM cell.
  • the measured values of Ec/No and RSCP are often not met, resulting in the inability to initiate reselection to the WCDMA cell.
  • the mobile terminal cannot reside in the WCDMA network.
  • the main technical problem to be solved by the present invention is to provide a mobile terminal capable of improving the reselection capability of a mobile terminal from a GSM cell to a WCDMA cell and a cell reselection method thereof.
  • the present invention provides a mobile terminal cell reselection method, including the following steps:
  • the WCDMA cell initiates reselection.
  • the setting of the reselection parameter from the GSM cell to the WCDMA cell of the mobile terminal includes setting a ratio of energy of each chip on each code channel and a power spectral density of the band-limited white noise after the spreading end of the WCDMA cell of the mobile terminal is expanded.
  • the first threshold, the second threshold of the received signal code power is expanded.
  • the comparison judgment includes: when the transmitting end of the WCDMA cell measured by the mobile terminal spreads spectrum, the measured value of the ratio of the energy of each chip and the band-limited white noise power spectral density per code channel is greater than or equal to the first threshold and continues The first predetermined time, and the measured value of the received signal code power of the WCDMA cell is greater than or equal to the second threshold and continues for a second predetermined time, and a reselection is initiated to the WCDMA cell.
  • the first threshold is set to be greater than or equal to -18 dB and less than FDD - Qmin - FDD - Qmin - Offset
  • the second threshold is set to be greater than or equal to -105 dB and less than FDD - RSCP - threshold.
  • the first threshold value and the second threshold value may be preset and may be modified when the mobile terminal is shipped from the factory.
  • a mobile terminal includes a setting module and a detecting module, where the setting module is configured to set a reselection parameter of a mobile terminal from a GSM cell to a WCDMA cell, where the detecting module is configured to use a signal measurement value of the WCDMA cell according to the The comparison of the parameters determines whether a reselection is initiated to the WCDMA cell.
  • the setting of the reselection parameter from the GSM cell to the WCDMA cell of the mobile terminal includes: setting a module to set a ratio of energy of each chip on each code channel and a ratio of band-limited white noise power spectral density after spreading of the transmitting end of the mobile terminal A threshold value, set the second threshold of the received signal code power.
  • the detecting module is further configured to measure a value of a ratio of energy of each chip and a band-limited white noise power spectral density per code channel after the spreading end of the WCDMA cell of the mobile terminal, and measure a value of the received signal code power of the mobile terminal. And measuring a ratio of the energy of each chip and the band-limited white noise power spectral density per code channel after the spreading at the transmitting end is greater than or equal to a first threshold and continuing for a first predetermined time and the received signal code When the measured value of the power is greater than or equal to the second threshold and continues for the second predetermined time, a reselection is initiated to the WCDMA 'J, zone.
  • the setting module is further configured to set the first threshold to be greater than or equal to -18 dB and less than FDD Qmin - FDD - Qmin - Offset, and set the second threshold to be greater than or equal to -105 dB and less than FDD - RSCP - Threshold.
  • the setting module is further configured to preset the first threshold and the second threshold when the mobile terminal is shipped from the factory, and set the first threshold and the second threshold to be modifiable.
  • the mobile terminal In the dual mode of GSM, if the mobile terminal first resides in the GSM cell, and the WCDMA network can be used, the mobile terminal cannot reside in the WCDMA cell, and the mobile terminal can reselect the WCDMA capability with high success rate. , giving users more opportunities to enjoy the colorful 3G business.
  • the measured value of the ratio of the energy per chip and the ratio of the band-limited white noise power spectral density per code channel after the spread of the WCDMA cell measured by the mobile terminal is greater than or equal to the first threshold and continues to be A predetermined time, and when the measured value of the received signal code power of the WCDMA cell is greater than or equal to the second threshold and continues for a second predetermined time, a reselection is initiated to the WCDMA cell.
  • the law is simple and easy.
  • the first threshold and the second threshold can be empirically derived, and it can be ensured that the mobile terminal can initiate reselection from the GSM cell to the WCDMA cell when the condition is satisfied.
  • the first threshold and the second threshold can be preset and can be modified when the mobile terminal is shipped from the factory, so that the operator and the user can set and modify according to actual needs, which can only be compared with the prior art. Accepting the parameters sent by the network side, it can be adjusted according to the actual situation, and the use is more flexible and convenient.
  • FIG. 1 is a schematic structural diagram of a specific implementation manner of a mobile terminal according to the present invention.
  • FIG. 2 is a flowchart of a cell reselection method according to the present invention.
  • FIG. 3 is a flowchart of a specific embodiment of a cell reselection method according to the present invention. detailed description
  • the mobile terminal includes a setting module and a detecting module.
  • a setting module configured to set a reselection parameter of the mobile terminal from a GSM cell to a WCDMA cell;
  • a detecting module configured to determine, according to a comparison between the signal measurement value of the WCDMA cell and the set parameter, whether to initiate reselection to the WCDMA cell.
  • the setting module sets the reselection parameter from the GSM cell to the WCDMA cell of the mobile terminal, including setting the module to set the energy of each chip on each code channel and the power spectral density of the band-limited white noise power after the spreading end of the WCDMA cell of the mobile terminal is set.
  • the detecting module determines whether to initiate reselection to the WCDMA cell based on the comparison between the signal measurement value of the WCDMA cell and the set parameter: the detecting module measures the energy of each chip on each code channel after the spreading end of the WCDMA cell is spread.
  • the value of the ratio of the power spectral density with the limited white noise, and the value of the power of the received signal code of the mobile terminal, and the energy of each chip and the band-limited white noise power spectral density per code channel after spreading at the transmitting end When the measured value of the ratio is greater than or equal to the first threshold Ec/No-min and continues for the first predetermined time, and the measured value of the received signal code power is greater than or equal to the second threshold RSCP_min and continues for the second predetermined time, A reselection is initiated to the WCDMA cell.
  • the first predetermined time may be set according to specific needs. In this embodiment, the first predetermined time may be set to 5 seconds or other suitable time.
  • the second predetermined time can also be set according to specific needs. In this embodiment, the second predetermined time can be set to 5 seconds or other suitable time.
  • the first threshold Ec/No_min may be set to be greater than or equal to -18 dB and less than FDD Qmin - FDD - Qmin - Offset
  • the second threshold RSCP_min is set to be greater than or equal to -105 dB and less than FDD - RSCP — threshokL
  • the setting module is also used to set the first threshold Ec/No_min and the second threshold RSCP_min according to the empirical value.
  • the setting module may preset the first threshold Ec/No_min and the second threshold RSCP_min when the mobile terminal is shipped from the factory, and set the first threshold Ec/No_min and the second threshold RSCP_min to be modify.
  • the mobile terminal cell reselection method of the present invention includes the following steps:
  • Step 201 Set a reselection parameter from the GSM cell to the WCDMA cell of the mobile terminal.
  • Step 202 Determine whether to initiate reselection to the WCDMA cell based on a comparison between the signal measurement value of the WCDMA cell and the parameter.
  • the parameters for comparison with the signal measurements of the WCDMA cell are the reselection parameters from the GSM cell to the WCDMA cell as described in step 201.
  • FIG. 3 is a flowchart of a specific embodiment of a cell reselection method according to the present invention. As shown in FIG. 3, the method includes the following steps:
  • Step 301 Set the threshold value Ec/No-min of Ec/No and the RSCP-min of RSCP.
  • the value of Ec/No is the first threshold
  • the first threshold Ec/No-min can be set to be greater than or equal to -18 dB and less than FDD — Qmin — FDD — Qmin — Offset.
  • the RSCP has a second wide value
  • the second threshold RSCP_min can be set to be greater than or equal to -105 dB and less than FDD - RSCP - threshold.
  • the first threshold Ec/No-min and the second threshold RSCP-min can be set based on empirical values. In practical applications, the first threshold Ec/No_min and the second threshold RSCP_min may be preset when the mobile terminal is shipped, and the first threshold Ec/No_min and the second threshold RSCP_min are set. It can be modified to make flexible adjustments to different networks.
  • Step 302 The mobile terminal detects the WCDMA cell.
  • the mobile terminal measures the surrounding WCDMA cell and measures its signal. In this embodiment, Ec/No and its duration, RSCP and its duration are measured.
  • Step 303 The measured value of Ec/No is greater than or equal to Ec/No-min and lasts for a first predetermined time, and the measured value of RSCP is greater than or equal to RSCP_min for a second predetermined time. If yes, go to step 304; otherwise, turn Step 302.
  • the mobile terminal determines whether the measured value of Ec/No is greater than or equal to Ec/No-min and continues for a first predetermined time.
  • the first predetermined time may be set according to specific needs. In this embodiment, the first predetermined time may be set to 5 Second or other suitable time; the mobile terminal determines whether the measured value of the RSCP is greater than or equal to RSCP_min and lasts for a second predetermined time, and the second predetermined time may also be set according to specific needs. In this embodiment, the second predetermined The time can be set to 5 seconds or other suitable time.
  • step 304 If the measured value of Ec/No is equal to or greater than Ec / No - min and last for the first predetermined time; the measured value of the RSCP is greater than or equal to RSCP - min and continues for a second predetermined time, go to step 304, otherwise, go to step 302.
  • Step 304 Initiate WCDMA cell reselection.
  • the mobile terminal initiates WCDMA cell reselection.
  • the second threshold RSCP-min and its second predetermined time in addition to setting the first threshold Ec/No-min and its first predetermined time, the second threshold RSCP-min and its second predetermined time, other parameters may be according to the 6.6.5 standard in 3GPP 45.008. Requirements.

Description

一种移动终端及其小区重选方法 技术领域
本发明涉及移动通信技术领域， 特别涉及一种移动终端及其小区重选 方法。 背景技术
随着移动通信技术的发展， 现在， 同一家运营商往往会同时经营着宽 带码分多址 （Wideband Code Division Multiple Access, WCDMA)网络和全 球移动通信系统 (Global System For Mobile Communication, GSM)网络， 主 要原因有： 3G主流标准中的 WCDMA是由 GSM演进而来， 运营商为保护 前期 GSM网络的投入， 大多在原来 GSM网络的基础上做改造和利用； 运 用商需要留住原来 GSM网络的用户； WCDMA网络建设不可能在短时间内 做的全覆盖等等。 在 WCDMA和 GSM网络共存时， 运营商都希望用户从 GSM网络转到 WCDMA网络， 这样用户就可能去使用丰富的 3G业务， 从 而增力。运营商的收入。
在 3GPP协议中 , 有对从 GSM到 WCDMA小区重选的相关要求， 涉 及的参数和算法很多， 主要釆用以下两种：
第一，在系统消息 SYSTEM— INFORMATION— 2QUATER中，会向移动 终端下发从 GSM到 WCDMA小区重选的控制参数， 移动终端收到后将这 些参数保存。 关键参数如下：
3G Measurement Parameters Description
Qsearch— I = 7 (0x7)
Qsearch—C— Initial = 0 (0x0)
fdd_qoffset_present = 1 (0x1) FDD— Qoffset = 0 (0x0)
FDD— REP— QUANT = 1 (0x1)
FDD— MULTIRAT— REPORTING = 0 (0x0)
FDD Qmin = 7 (0x7)
tdd_qoffset_present = 0 (0x0)
取值说明可以参考 3GPP协议 45.008。 其中， Qsearch— I通常取值为 7, 表示只要 WCDMA小区测量满足要求无条件选择到 WCDMA小区上，运营 商通常按此配置是为了尽可能让用户转到 WCDMA网络上。
第二， 移动终端在驻留 GSM小区后， 会不停对周围的 WCDMA小区 做测量， 移动终端对测量值按 3GPP 45.008中 6.6.5的要求做计算、 判断。 由于 Qsearch— I通常设置为 7 (表示无条件 ),最终判断发射端扩谱后每码道 上每个码片的能量和带限白噪声功率语密度的比 （ Received energy per chip divided by the noise spectral density, Ec/No )和接收信号码功率 ( Receive signal code power, RSCP )测量值是否满足判断条件并持续 5秒以上， 如果 通过的话就发起 WCDMA小区选择。 判断条件为： Ec/No的测量值是否大 于等于 FDD— Qmin - FDD— Qmin— Offset; RSCP 的测量值是否大于等于 FDD— RSCP— threshold;
网络侧下发的 SYSTEM— INFORMATION— 2QUATER 系统消息决定 FDD— Qmin、 FDD— Qmin— Offset, FDD— RSCP— threshold 的取值大小。 具体 计算和取值方法参见 3GPP 45.008。
在实际的外场测试中， 经常发现移动终端在设置为仅 WCDMA制式的 情况下， 可以注册上 WCDMA网络， 但在设置为 WCDMA和 GSM双模制 式的情况下， 移动终端如果先驻留在 GSM小区， 往往对 Ec/No和 RSCP的 测量值不满足要求，导致不能向 WCDMA小区发起重选。于是出现 WCDMA 网络在可以使用的情况下， 移动终端却不能驻留 WCDMA网络。 发明内容
本发明要解决的主要技术问题是，提供一种可提高移动终端从 GSM小 区到 WCDMA小区重选能力的移动终端及其小区重选方法。
为解决上述技术问题， 本发明提供一种移动终端小区重选方法， 包括 以下步骤：
对移动终端从 GSM小区到 WCDMA小区的重选参数进行设置； 基于 WCDMA 小区的信号测量值与所述参数的比较判断是否向
WCDMA小区发起重选。
所述对移动终端的从 GSM小区到 WCDMA小区重选参数进行设置包 括设置移动终端的 WCDMA小区的发射端扩语后每码道上每个码片的能量 和带限白噪声功率谱密度的比的第一阔值、 设置接收信号码功率的第二阔 值。
所述比较判断包括当所述移动终端测量的 WCDMA小区的发射端扩谱 后每码道上每个码片的能量和带限白噪声功率谱密度的比的测量值大于等 于第一阔值且持续第一预定时间， 以及 WCDMA小区的接收信号码功率的 测量值大于等于第二阔值且持续第二预定时间时， 向所述 WCDMA小区发 起重选。
所述第一阔值设置为 大于等于 -18dB 并小于 FDD— Qmin - FDD— Qmin— Offset , 所述第二阔值设置为大于等于 -105dB 并小于 FDD— RSCP— threshold。
所述第一阔值和所述第二阔值可在移动终端出厂时预置并可修改。 一种移动终端， 包括设置模块和检测模块， 所述设置模块用于对移动 终端从 GSM小区到 WCDMA小区的重选参数进行设置， 所述检测模块用 于基于 WCDMA小区的信号测量值与所述参数的比较判断是否向 WCDMA 小区发起重选。 所述对移动终端的从 GSM小区到 WCDMA小区重选参数进行设置包 括设置模块设置移动终端的发射端扩谱后每码道上每个码片的能量和带限 白噪声功率谱密度的比的第一阔值、 设置接收信号码功率的第二阔值。
所述检测模块还用于测量移动终端 WCDMA小区的发射端扩语后每码 道上每个码片的能量和带限白噪声功率谱密度的比的值， 以及测量移动终 端接收信号码功率的值， 并在所述发射端扩谱后每码道上每个码片的能量 和带限白噪声功率谱密度的比的测量值大于等于第一阔值且持续第一预定 时间以及所述接收信号码功率的测量值大于等于第二阔值且持续第二预定 时间时， 向所述 WCDMA 'J、区发起重选。
所述设置模块还用于将所述第一阔值设置为大于等于 -18dB 并小于 FDD Qmin - FDD— Qmin— Offset,将所述第二阔值设置为大于等于 -105dB并 小于 FDD— RSCP— threshold。
所述设置模块还用于在移动终端出厂时预置所述第一阔值和所述第二 阔值， 并将所述第一阔值和所述第二阔值设置为可修改。
本发明的有益效果是：
( 1 )本发明中 , 对移动终端从 GSM小区到 WCDMA小区重选参数进 行设置； 基于 WCDMA 小区的信号测量值与所述参数的比较判断是否向 WCDMA小区发起重选， 解决了移动终端在 WCDMA和 GSM双模式下 , 如移动终端先驻留在 GSM小区， 出现 WCDMA网络可以使用的情况下， 移动终端却不能驻留在 WCDMA 小区的问题， 提高移动终端向 WCDMA 重选的能力且成功率高， 使用户有更多机会享受丰富多彩的 3G业务。
( 2 )本发明中， 移动终端测量的 WCDMA 小区的发射端扩谱后每码 道上每个码片的能量和带限白噪声功率谱密度的比的测量值大于等于第一 阔值且持续第一预定时间， 以及 WCDMA小区的接收信号码功率的测量值 大于等于第二阔值且持续第二预定时间时， 向 WCDMA小区发起重选， 方 法简单易行。
( 3 )本发明中， 第一阔值和所述第二阔值可通过经验值得出， 可以确 保在条件满足时，移动终端就可发起从 GSM小区到 WCDMA小区的重选。
( 4 )本发明中， 第一阔值和第二阔值可在移动终端出厂时预置并可修 改， 使运营商和用户可根据实际需要进行设置和修改， 相对于现有技术中 只能接受网络侧下发的参数来说， 可根据实际情况进行调整， 使用更加灵 活方便。 附图说明
图 1为本发明移动终端具体实施方式的结构示意图；
图 2为本发明小区重选方法的流程图；
图 3为本发明小区重选方法具体实施例的流程图。 具体实施方式
下面通过具体实施方式结合附图对本发明作进一步详细说明。
图 1为本发明移动终端具体实施方式的结构示意图， 如图 1所示， 本 发明移动终端的一种实施方式中， 该移动终端包括设置模块和检测模块； 其中，
设置模块， 用于对移动终端的从 GSM小区到 WCDMA小区重选参数 进行设置；
检测模块， 用于基于 WCDMA小区的信号测量值与所述设置的参数的 比较判断是否向 WCDMA小区发起重选。
设置模块对移动终端的从 GSM小区到 WCDMA小区重选参数进行设 置包括设置模块设置移动终端的 WCDMA小区的发射端扩语后每码道上每 个码片的能量和带限白噪声功率谱密度的比的第一阔值 Ec/No— min,以及设 置接收信号码功率的第二阔值 RSCP— min。 所述检测模块基于 WCDMA小区的信号测量值与所述设置的参数的比 较判断是否向 WCDMA小区发起重选为：： 检测模块测量 WCDMA小区的 发射端扩谱后每码道上每个码片的能量和带限白噪声功率谱密度的比的 值， 以及测量移动终端接收信号码功率的值， 并在所述发射端扩谱后每码 道上每个码片的能量和带限白噪声功率谱密度的比的测量值大于等于第一 阔值 Ec/No— min且持续第一预定时间、 且所述接收信号码功率的测量值大 于等于第二阔值 RSCP— min且持续第二预定时间时， 向 WCDMA小区发起 重选。
第一预定时间可以根据具体需要进行设置， 在本具体实施方式中， 第 一预定时间可以设置为 5秒或是其他合适的时间。 第二预定时间也可以根 据具体需要进行设置， 在本具体实施方式中， 第二预定时间可以设置为 5 秒或是其他合适的时间。
优选的， 可以将第一阔值 Ec/No— min设置为大于等于 -18dB 并小于 FDD Qmin - FDD— Qmin— Offset, 将第二阔值 RSCP— min设置为大于等于 -105dB并小于 FDD— RSCP— threshokL
设置模块还用于根据经验值设置第一阔值 Ec/No— min 和第二阔值 RSCP— min。
设置模块可以在移动终端出厂时预置第一阔值 Ec/No— min和第二阔值 RSCP— min,并将第一阔值 Ec/No— min和第二阔值 RSCP— min设置为可修改。
图 2为本发明小区重选方法的流程图， 如图 2所示， 本发明移动终端 小区重选方法包括以下步骤：
步骤 201 :对移动终端的从 GSM小区到 WCDMA小区重选参数进行设 置。
步骤 202: 基于 WCDMA小区的信号测量值与所述参数的比较判断是 否向 WCDMA小区发起重选。 这里， 用于与 WCDMA小区的信号测量值比较的参数即步骤 201所述 从 GSM小区到 WCDMA小区重选参数。
下面具体说明本发明移动终端小区重选方法， 图 3 为本发明小区重选 方法具体实施例的流程图， 如图 3所示， 该方法包括以下步骤：
步骤 301： 设置 Ec/No的阔值 Ec/No— min和 RSCP的阔值 RSCP— min。 在本具体实施方式中， Ec/No的阔值为第一阔值， 第一阔值 Ec/No— min 具体可设置为大于等于 -18dB并小于 FDD— Qmin - FDD— Qmin— Offset。 RSCP 的阔值为第二阔值， 第二阔值 RSCP— min具体可设置为大于等于 -105dB并 小于 FDD— RSCP— threshold。
第一阔值 Ec/No— min和第二阔值 RSCP— min可以根据经验值进行设置。 实际应用中， 可在移动终端出厂时预置第一阔值 Ec/No— min和第二阔 值 RSCP— min,并将第一阔值 Ec/No— min和第二阔值 RSCP— min设置为可修 改， 这样可对不同网络进行灵活调整。
步骤 302: 移动终端检测 WCDMA小区。
移动终端测量周围的 WCDMA小区， 并对其信号进行测量， 在本具体 实施方式中， 需测量 Ec/No及其持续时间、 RSCP及其持续时间等。
步骤 303: Ec/No的测量值大于等于 Ec/No— min且持续第一预定时间， 且 RSCP的测量值大于等于 RSCP— min且持续第二预定时间， 如果是， 转 步骤 304; 否则， 转步骤 302。
移动终端判断 Ec/No的测量值是否大于等于 Ec/No— min且持续第一预 定时间， 第一预定时间可以根据具体需要进行设置， 在本具体实施方式中， 第一预定时间可以设置为 5 秒或是其他合适的时间； 移动终端判断 RSCP 的测量值是否大于等于 RSCP— min且持续第二预定时间， 第二预定时间也 可以根据具体需要进行设置， 在本具体实施方式中， 第二预定时间可以设 置为 5 秒或是其他合适的时间。 如同时满足 Ec/No 的测量值大于等于 Ec/No— min且持续第一预定时间； RSCP的测量值大于等于 RSCP— min且持 续第二预定时间， 转步骤 304, 否则， 转步骤 302。
步骤 304: 发起 WCDMA小区重选。
这里 , 移动终端发起 WCDMA小区重选。
本发明中， 除对第一阔值 Ec/No— min 及其第一预定时间、 第二阔值 RSCP— min及其第二预定时间进行设置外， 其他参数可根据 3GPP 45.008中 6.6.5标准的要求。
以上内容是结合具体的实施方式对本发明所作的进一步详细说明， 不 能认定本发明的具体实施只局限于这些说明。 对于本发明所属技术领域的 普通技术人员来说， 在不脱离本发明构思的前提下， 还可以做出若干简单 推演或替换， 都应当视为属于本发明的保护范围。

Claims

权利要求书
1、 一种移动终端， 其特征在于， 该移动终端包括设置模块和检测模块； 其中，
所述设置模块，用于对移动终端从全球移动通信系统 GSM小区到宽带 码分多址 WCDMA小区的重选参数进行设置；
所述检测模块， 用于基于 WCDMA小区的信号测量值与所述设置的参 数的比较判断是否向 WCDMA小区发起重选。
2、 如权利要求 1所述的移动终端， 其特征在于， 所述设置模块对移动 终端的从 GSM小区到 WCDMA小区重选参数进行设置包括： 设置模块设 置移动终端的发射端扩谱后每码道上每个码片的能量和带限白噪声功率谱 密度的比的第一阔值、 设置接收信号码功率的第二阔值。
3、 如权利要求 2 所述的移动终端， 其特征在于， 所述检测模块基于 WCDMA小区的信号测量值与所述设置的参数的比较判断是否向 WCDMA 小区发起重选为：
所述检测模块测量移动终端 WCDMA小区的发射端扩谱后每码道上每 个码片的能量和带限白噪声功率谱密度的比的值， 以及测量移动终端接收 信号码功率的值， 并在所述发射端扩谱后每码道上每个码片的能量和带限 白噪声功率谱密度的比的测量值大于等于第一阔值且持续第一预定时间、 且所述接收信号码功率的测量值大于等于第二阔值且持续第二预定时间 时， 向所述 WCDMA小区发起重选。
4、 如权利要求 2或 3所述的移动终端， 其特征在于， 所述设置模块设 置移动终端的发射端扩谱后每码道上每个码片的能量和带限白噪声功率谱 密度的比的第一阔值、 设置接收信号码功率的第二阔值为： 设置模块将所 述第一阔值设置为大于等于 -18dB并小于 FDD— Qmin - FDD— Qmin— Offset, 将所述第二阔值设置为大于等于 -105dB并小于 FDD RSCP threshokL
5、 如权利要求 2或 3所述的移动终端， 其特征在于， 所述设置模块设 置移动终端的发射端扩谱后每码道上每个码片的能量和带限白噪声功率谱 密度的比的第一阔值、 设置接收信号码功率的第二阔值为： 所述设置模块 在移动终端出厂时预置所述第一阈值和所述第二阈值， 并将所述第一阔值 和所述第二阔值设置为可修改。
6、 一种移动终端小区重选方法， 其特征在于， 该方法包括：
对移动终端从 GSM小区到 WCDMA小区的重选参数进行设置； 基于 WCDMA 小区的信号测量值与所述参数的比较判断是否向
WCDMA小区发起重选。
7、 如权利要求 6所述的移动终端小区重选方法， 其特征在于， 所述对移动终端的从 GSM小区到 WCDMA小区重选参数进行设置包 括： 设置移动终端的 WCDMA小区的发射端扩谱后每码道上每个码片的能 量和带限白噪声功率谱密度的比的第一阔值、 设置接收信号码功率的第二 阔值。
8、 如权利要求 7所述的移动终端小区重选方法， 其特征在于， 所述基 于 WCDMA 小区的信号测量值与所述设置的参数的比较判断是否向 WCDMA小区发起重选为： 比较判断包括当所述移动终端测量的 WCDMA 小区的发射端扩谱后每码道上每个码片的能量和带限白噪声功率谱密度的 比的测量值大于等于第一阔值且持续第一预定时间、 且 WCDMA小区的接 收信号码功率的测量值大于等于第二阔值且持续第二预定时间时， 向所述 WCDMA小区发起重选。
9、 如权利要求 7或 8所述的移动终端小区重选方法， 其特征在于， 所 述设置第一阔值、 第二阔值为： 设置所述第一阔值设置为大于等于 -18dB并 小于 FDD— Qmin - FDD— Qmin— Offset, 所述第二阔值设置为大于等于 -105dB 并小于 FDD RSCP threshold。
10、 如权利要求 7或 8所述的移动终端小区重选方法， 其特征在于， 所述第一阔值和所述第二阔值在移动终端出厂时预置并可修改。
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