JOINTLY USED ALARM CHANNEL Russian patent published in 2010 - IPC H04W28/12 H04J13/06 

FIELD: information technologies.

SUBSTANCE: in system of communication with multistation access with orthogonal frequency division multiplexing, jointly used alarm channel may be used to provide alarm messages, confirmations of reception and adjustment of capacity to access terminals within the system limits. Assignment of previously specified number of subcarriers for jointly used alarm channel establishes fixed costs in pass band for channel. Actual subcarriers assigned for the channel may change periodically and may change according to the previously specified schedule of jump-liked frequency tuning. Value of signal capacity distributed to alarm channel may change symbol by symbol depending on requirements to capacity of communication channel. Jointly used alarm channel may send each message carried along the channel to one or more access terminals. Messages of one-address transfer make it possible to control channel capacity in compliance with the requirements of separate communication channels.

EFFECT: jointly used alarm channel may be assigned for a previously specified number of subcarriers within any cycle.

32 cl, 5 dwg