公开(公告)号：US20080316991A1

公开(公告)日：2008-12-25

申请号：US12091600

申请日：2005-11-25

申请人： Xuemin Liu ,  Huiying Fang

发明人： Xuemin Liu ,  Huiying Fang

IPC分类号： H04Q7/28

CPC分类号： H04W4/08 ,  H04W8/186

摘要： The present invention relates to a control method for re-access after the terminal in the trunking system exits the group call, which includes the following steps: it is to maintain one message number for every group call for updating and send the message number to the terminal when the call is established, and the terminal retains the message number after accessing the call; the terminal sets the exit symbol as “unable to passively access” when it exits the call normally, and as “able to passively access” when it exits the call abnormally; after the terminal has received periodically transmitted paging message in its idle state, it judges whether the exit symbol of the corresponding group is the type of “able to passively access”, if yes, it accesses the call and then the procedure end; if the exit symbol is “unable to passively access”, then the terminal judges whether the message number retained in the group is the same as the message number in the paging message, if not, it accesses the call, otherwise discards the paging message. According to the present invention, the terminal will not passively re-access the call because of receiving the periodical paging message after normally exiting the call, and at the same time, the terminal can re-access the call after abnormally exiting the call.

摘要翻译： 本发明涉及一种在中继系统中的终端退出群组呼叫之后重新访问的控制方法，其包括以下步骤：为每个群组呼叫维护一个消息号码，并将消息号码发送给 呼叫建立终端，终端在接入呼叫后保留消息号码; 终端在正常退出呼叫时将出口符号设置为“无法被动访问”，并且当其异常退出时，将其设置为“能够被动访问” 在终端已经接收到处于其空闲状态的周期性发送的寻呼消息之后，判断对应组的退出符号是否为“能够被动接入”的类型，如果是，则访问该呼叫，然后进程结束; 如果退出符号“不能被动访问”，则终端判断该组中保留的消息号是否与寻呼消息中的消息号相同，否则接入该呼叫，否则丢弃寻呼消息。 根据本发明，由于在正常退出呼叫之后接收到周期性的寻呼消息，终端不会被动地重新接入呼叫，同时终端可以在异常退出呼叫之后重新接入呼叫。