Multisite radio system with false mobile radio signalling detect

Details Multisite radio system with false mobile radio signalling detect Multisite radio system with false mobile radio signalling detect

1995-10-26

1999-02-23

Chin, Stephen

Pulse or digital communications

Repeaters

Testing

H04B 1702

Patent

active

058752110

ABSTRACT:
In a digitally trunked radio repeating system that may include several radio site repeating transceivers, a site area identification coding system to ensure that transmissions intended for one site or as one mode are not decoded by another site or as another transmission mode. In particular, a site or transmission mode identification byte is used in the transmission error coding (CRC) scheme applied by both a mobile transceiver and the radio site repeater. Since the identification byte is used in the transmitter to calculate the CRC error correction data, the same identification byte must be used in the receiver to decode the CRC value. The intended radio site or transmission mode wilt apply the proper identification byte to decode a transmission. The wrong radio site or mode will not correctly decode the CRC value in a transmission because the wrong identification byte will be applied to the transmission. Accordingly, a transmission received by the wrong radio site or at a transceiver operating in a mode different that the transmission will not properly decode the transmission due to a CRC error caused by applying the wrong identification byte.

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Air Interface of the Future European Fully Digital Trunk Radio System, Institute of Electrical and Electronics Engineers, pp. 714-717, No. 43, May 18, 1993.

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