Improvement and Design for the Process of Notification Response in GSM-R System
MA Guang-si · Zhongguo tiedao kexue · 2007
In delay assignment of GSM—R system,TCH channels are dynamically assigned.TCHs are not assigned in the group cells without any user,and MSs could apply for TCH by notification response to join the call.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.Two measures were provided to let the notification response failed MS join the group call.One is to delay the handling of reduplicated notification response by fist in first out in MSC.When some notification response is succeeded,MSC reject the other notification response and tell the related MSs the newly assigned group channel information so that the MSs could join the group call.Another is to let MS listen to the NCH instead of going to idle mode after failed in notification response process and try to join the newly assigned group channel in some time.