Multidirection multiplex communication system

Claim 2

A TDM/TDMA multidirection multiplex communication system of a demand assign type in which M subscriber signals, wherein M is an integer, are multiplexed on N radio channels, wherein N is integer smaller than M, the system providing a radio frame arrangement in response to every call; said radio frame arrangement comprising an N/I multiframe format consisting of N/I frames, wherein I is an integer smaller than N; each frame of said N/I multiframe format comprising: a frame synchronization signal (F1 to FN) capable of being arranged in an N/I multiframe format and indicative of the time reference of the frame; a control channel (C1 to CN) for a control signal for connection including assignment of conversation channels for call origination and termination; N conversation channels (CH1 to CHN) each comprising a time slot sufficient in capacity to transmit a main signal; and I additional bit transmission channels (HK1 to HKN) being associated with conversation channels and comprising a subscriber identification number, information of call origination and termination, and error check bits.

Claim 3

A TDM/TDMA multidirection multiplex communication system of a demand assign type in which M subscriber signals, wherein M is an integer, are multiplexed on N radio channels, wherein N is an integer smaller than M, the system providing a radio frame arrangement comprising a multiframe format as defined in Claim 1 or in Claim 2 in response to every call and comprising; means for generating said radio frame arrangement comprising: first converting means for converting M voice signals sent from subscriber stations into M digital data signals; control means (C) for generating, on determining presence/absence of each of said M voice signals, a control signal (c) for assignment, a subscriber identification number, information of call origination and termination, and error check bits; selecting means (B) responsive to said control signal (c) for assigning said M digital data signals to N conversation channels and outputting N digital data signals; signal generating means (E) for generating a multiframe timing signal and time slot timing signals; second converting means (F) for converting said information into a burst signal in response to said multiframe timing signal; a third converting means (D1 to DN) for converting said N digital data signals into N burst signals; and multiplexing means (22) for multiplexing said burst signal and said N burst signals.