在守侯状态下，移动台可以发起分组数据协议上下文的激活和去激活。

The MS may initiate activation or deactivation of PDP contexts while in STANDBY state.

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该方案存在的问题是：多个移动台同时发起通知响应时，部分MS响应失败，无法及时直接加入呼叫。

But there may be a problem that many MSs could not automatically join the group call in the case of multi MSs sending notification response simultaneously.

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本发明提出的方法及移动台，能够选择合适的时间发起小区更新过程，从而节约RACH信道资源。

The method and mobile station of the invention can select the proper time to initiate the subdistrict updating process to save the RACH signal channel resources.

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