Communication system link re-establishment protocol

Details Communication system link re-establishment protocol Communication system link re-establishment protocol

H - Electricity

04

M

H04M 1/00 (2006.01) H04L 29/06 (2006.01) H04M 1/725 (2006.01)

Patent

CA 2120621

2120621 9308660 PCTABS00021 A method for re-establishing a communication link that has been lost between a portable unit (406) and a fixed unit or base station (402) provides for a way of quickly re-establishing the lost communication link, on the previously used RF channel by transmitting a link re-establishment code word (900) using MUX 1 or protocol after determining that synchronization has been lost (502) for a predetermined period of time (504). This is followed by automatically switching the portable unit (406) from MUX 1 to MUX 3 communication protocol. Followed by re-establishing communication (re-establish synchronization) between the portable (406) and base station (402) in MUX 3 and switching the two communication devices (402 and 406) back to MUX 1 after the communication link has been re-established. The same steps can be followed by base site (402) if it has been the first to detect loss of the communication link.

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