Method of transmitting signaling messages in a mobile radio communication system
AssigneeTelefonaktiebolaget L M Ericsson
InventorsJan E. A. S. Dahlin, Krister A. Raith
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Abstract
In a mobile radio communications system, critical signaling messages, e.g., handoff messages, transmitted on a fast associated control channel and/or a slow associated control channel belonging to a digital traffic channel, are more heavily data protected than speech using convolutional coding and interburst interleaving. The coding and interburst interleaving are carried out so as to maintain compatibility with an exiting frame structure.
Claims12
A method of transmitting signaling messages on a fast associated control channel belonging to a digital traffic channel in a mobile radio communication system, comprising the steps of:
- coding digital speech signals at a given coding rate to produce coded digital speech signals;
- transmitting said coded digital speech signals on said digital traffic channel;
- coding digital signaling messages at a coding rate less than said given coding rate to produce coded digital signaling messages with more data redundancy than said coded digital speech signals;
- and
- transmitting coded digital signaling messages on said fast associated control channel belonging to said digital traffic channel.
A method of transmitting signaling messages on a slow associated control channel belonging to a digital traffic channel in a mobile radio communication system, comprising the steps of:
- applying interburst interleaving of a given interburst interleaving depth to digital speech signals to produce interburst interleaved digital speech signals;
- transmitting said interburst interleaved digital speech signals on said digital traffic channel;
- coding digital signaling messages at a coding rate of less than 1/1 to produce coded digital signaling messages;
- applying interburst interleaving, of an interburst interleaving depth greater than said given interburst interleaving depth, to said coded digital signaling messages to produce interburst interleaved coded digital signaling messages;
- and
- transmitting said interburst interleaved coded digital signaling messages on said slow associated control channel belonging to said digital traffic channel.
Dependencies are inferred from the claim text.