Signalling method for establishing trunked communication

Details Signalling method for establishing trunked communication Signalling method for establishing trunked communication

Category

H - Electricity

Subcategory

04

Subsubcategory

Q

CPC

325/28

IPC codes

H04Q 7/00 (2006.01) H04Q 7/28 (2006.01)

Type

Patent

Patent number

CA 1270525

Description

SIGNALLING METHOD FOR ESTABLISHING TRUNKED COMMUNICATION Abstract A trunked communication signalling method is provided by a unifying signalling protocol in which subscribers (102, 104) request communication channels (106) using only their individual IDs (404) encoded into single ISWs (402). The central (110) decodes the call reguest, extracts the requesting subscriber's individual ID, which is cross referenced to determine the subscriber's talk-group affiliation(s). If the requesting subscriber's affiliation(s) are not known, the central commands the subscriber to transmit its affiliation using dual ISW signalling (408). In another aspect of the present invention, each subscriber automatically informs the central of a change in talk-group affiliation, thereby providing continual affiliation updates. In this way, many thousand subscribers are afforded access to a single trunked system (100), and control channel traffic congestion is minimized.

Application Number

558191

Affiliated with

Also associated with

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