Handoff procedure that minimizes disturbances to dtmf...

Details Handoff procedure that minimizes disturbances to dtmf... Handoff procedure that minimizes disturbances to dtmf...

H - Electricity

04

B

H04B 7/26 (2006.01) H04Q 7/38 (2006.01)

Patent

CA 2052960

Disturbances to DTMF signaling between mobile stations and the land-based system caused by handoff are minimized. DTMF signals are transmitted in real time between a mobile station and its associated base station. However, if during a DTMF transmission between a base station and the mobile switching center a handoff is requested, the handoff is delayed by a specified time in order to allow completion of the DTMF transmission. Alternatively, both base stations involved in the handoff transmit overlapping DTMF tones until the handoff is completed. If the handoff is requested before the start of the DTMF tone transmission, the DTMF transmission is delayed until the handoff is completed.

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