Multisite radio system with false mobile radio signalling detection
Number of patents in Portfolio can not be more than 2000
United States of America Patent
Stats
-
Feb 23, 1999
Grant Date -
N/A
app pub date -
Oct 26, 1995
filing date -
Oct 26, 1995
priority date (Note) -
Expired
status (Latency Note)
Importance
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.
First Claim
Family
International Classification(s)
Cited Art Landscape
Patent Citation Ranking
Advertisement
Advertisement
Advertisement
Recipient Email Address
Recipient Email Address
Comment
Recipient Email Address
Add to Portfolio(s)
To add this patent to one, or more, of your portfolios, simply click the add button.
This Patent is in these Portfolios:
Add to additional portfolios:
Last Refreshed On:
Changes done successfully