Radio communication system employing spectral reuse transceivers
First Claim
1. A method of conducting communications between respective transceivers of a communication network using a selected portion of a prescribed communication bandwidth containing a plurality of sub-bandwidth channels, said method comprising the steps of:
- (a) monitoring said prescribed communication bandwidth for the presence of communication activity on said sub-bandwidth communication channels, and identifying those ones of said sub-bandwidth communication channels which are absent communication activity as clear channels available for use by said respective transceivers; and
(b) causing said respective transceivers to conduct communications therebetween using selected ones of said clear channels identified in step (a).
5 Assignments
0 Petitions
Accused Products
Abstract
A spectral reuse transceiver-based communication system conducts communications between a master site and a plurality of remote sites using a selected portion of a communication bandwidth containing a plurality of sub-bandwidth channels. Each remote site transceiver monitors the communication bandwidth for activity on the sub-bandwidth channels, and informs a master site transceiver which sub-bandwidth communication channels are absent communication activity and therefore constitute clear channels. The master site transceiver compiles an aggregate list of clear channels from all the remote sites and then broadcasts the aggregate list to the remote sites. The master site and a remote site then conduct communications therebetween by frequency-hopping and/or orthogonal frequency multiplexing among the clear channels using an a priori known PN sequence.
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Citations
31 Claims
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1. A method of conducting communications between respective transceivers of a communication network using a selected portion of a prescribed communication bandwidth containing a plurality of sub-bandwidth channels, said method comprising the steps of:
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(a) monitoring said prescribed communication bandwidth for the presence of communication activity on said sub-bandwidth communication channels, and identifying those ones of said sub-bandwidth communication channels which are absent communication activity as clear channels available for use by said respective transceivers; and
(b) causing said respective transceivers to conduct communications therebetween using selected ones of said clear channels identified in step (a). - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9)
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10. A system for conducting communications between respective sites of a communication network using a selected portion of a prescribed communication bandwidth containing a plurality of sub-bandwidth channels, said system comprising:
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a master site transceiver and a plurality of remote site transceivers, each remote site transceiver being operative to monitor said prescribed communication bandwidth for the presence of communication activity on said sub-bandwidth communication channels, and to inform said master site transceiver which of said sub-bandwidth communication channels are absent communication activity and therefore constitute clear channels available for use by said communication system;
said master site transceiver being operative to compile an aggregate list of clear channels identified by said plurality of remote site transceivers and to transmit a message to said plurality of remote site transceivers containing information representative of said aggregate list of clear channels; and
whereinsaid master site transceiver and a remote site transceiver are operative to conduct communications therebetween using selected ones of said clear channels contained in said aggregate list. - View Dependent Claims (11, 12, 13, 14, 15)
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16. A method of conducting communications between transceivers of a communication network, using a selected portion of a prescribed communication bandwidth containing a plurality of sub-bandwidth channels, said method comprising the steps of:
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(a) at a master site transceiver, transmitting a clear channel assessment message that is detectable by each of remote site transceivers;
(b) at each remote site transceiver, receiving said clear channel assessment message and, in response thereto, scanning said prescribed communication bandwidth for effective communication activity on said sub-bandwidth communication channels, and identifying which of said sub-bandwidth communication channels appear to said each remote site transceiver to be absent effective communication activity and thereby constitute clear channels available for use;
(c) at each remote site transceiver, transmitting a message to said master site transceiver containing information from which said clear channels may be identified at said master site transceiver;
(d) at said master site transceiver receiving messages transmitted from remote sites in step (c), compiling an aggregate list of clear channels as identified in said received messages, and transmitting to each remote site transceiver a clear channel usage message representative of said aggregate list; and
(e) causing said master site and a remote site transceiver to conduct communications therebetween using selected ones of said clear channels of said aggregate list. - View Dependent Claims (17, 18, 19, 20, 21, 22, 23)
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24. A method of conducting communications between respective unlicensed transceivers of a communication network using a selected portion of a communication bandwidth containing a plurality of licensed sub-bandwidth channels, said method comprising the steps of:
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(a) monitoring said communication bandwidth for the presence of communication activity by licensed users on said licensed sub-bandwidth communication channels, and identifying those ones of said licensed sub-bandwidth communication channels which are absent communication activity by licensed users as clear channels available for use by said respective unlicensed transceivers; and
(b) causing said respective unlicensed transceivers to conduct communications therebetween using selected ones of said clear channels identified in step (a). - View Dependent Claims (25, 26, 27, 28, 29, 30, 31)
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Specification