| 摘要 |
A mobile (MS) desires registration in a mobile telecommunication network (MSC&BSS) and a calling subscriber simultaneously requests a speech connection to the mobile (MS). The mobile requests a signalling channel (SDCCH) through an access procedure, and the network (MSC&BSS) assigns the channel. The mobile requests registration on the signalling channel (SDCCH) and receives an accept message (26) from the network. When a call is waiting, the network (MSC&BSS) retains (61) the signalling channel (SDCCH) and the mobile (MS) receives (62) a message to this effect. The mobile (MS) accepts the call (62) by sending a message to the network (MSC&BSS) over the signalling channel (SDCCH). The mobile (MS) may have a frequency range capability which exceeds a standard frequency range. The network (MSC&BSS) requests (63) information concerning the frequency capability of the mobile (MS) and the mobile (MS) answers (64) the network (MSC&BSS) and the network assigns (65) a speech channel (SPEECH). The network informs (65) the mobile (MS) of the speech channel (SPEECH) and the mobile switches to this channel (SPEECH) from the signalling channel (SDCCH). The method has the advantage of shortening the time taken to set-up the speech channel (SPEECH), by retaining the signalling channel (SDCCH) after registration. |
