Frequency management system for use in multistation H.F. communication network
First Claim
1. For use in a multistation communication network containing a plurality of N stations each of which is capable of communicating with any other station of the network over any one of a plurality of K communication frequencies, a method of establishing a communication channel over one of said frequencies between a first station desiring to communicate with a second station of said network comprising the steps of:
- at said first station,(a) transmitting, on plural ones of said K communication frequencies in sequence, a probe waveform containing a first pseudo random code representative of the identity of said second station and a second pseudo random code representative of the identity of said first station; and
at said second station,(b) sequentially monitoring each of said K communication frequencies for a transmission containing said first pseudo random code; and
(c) in response to detecting, in step (b), a transmission containing said first pseudo random code, transmitting, on plural ones of said K communication frequencies in sequence, a response waveform containing said second pseudo random code and a third pseudo random code representative of a prescribed one of said K communication frequencies to be used as the channel over which said first and second stations are to communicate with one another.
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Accused Products
Abstract
A frequency management scheme for a multistation H.F. communication network establishes communication channels among network stations over respective ones of K frequencies, so that network stations may communicate with one another. Any station desiring to communicate with another station, repeatedly transmits, on each of plural ones of the K communication frequencies in sequence, a probe message comprised of three successive symbols, each of which is defined in accordance with a prescribed pseudo random M-ary code, in the form of multi-chip sequence, that represents the address of the station to whom the communication is directed. The first symbol is effectively unmodulated to permit monitoring equipment of a receiving station of the network to settle out. The second symbol represents the address of the transmitting station. The third symbol identifies the number of times that the frequency which carries the probe message has been transmitted. Each idle station monitors the level of activity of each of the K communication frequencies by successively dwelling on each frequency for the length of time required for any message-transmitting station to step through all K frequencies of the network. During each dwell time, the idle station looks for its address. If a probe message is directed to that monitoring station, the addressed station transmits back to the probing station a prescribed three symbol response message.
138 Citations
38 Claims
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1. For use in a multistation communication network containing a plurality of N stations each of which is capable of communicating with any other station of the network over any one of a plurality of K communication frequencies, a method of establishing a communication channel over one of said frequencies between a first station desiring to communicate with a second station of said network comprising the steps of:
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at said first station, (a) transmitting, on plural ones of said K communication frequencies in sequence, a probe waveform containing a first pseudo random code representative of the identity of said second station and a second pseudo random code representative of the identity of said first station; and at said second station, (b) sequentially monitoring each of said K communication frequencies for a transmission containing said first pseudo random code; and (c) in response to detecting, in step (b), a transmission containing said first pseudo random code, transmitting, on plural ones of said K communication frequencies in sequence, a response waveform containing said second pseudo random code and a third pseudo random code representative of a prescribed one of said K communication frequencies to be used as the channel over which said first and second stations are to communicate with one another. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13)
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14. For use in a multistation communication network containing a plurality of N stations each of which is capable of communicating with any other station of the network over any one of a plurality of K communication frequencies, a method of managing the establishment of communication channels over respective ones of said frequencies so that stations of said network may communicate with one another comprising the steps of:
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at any station desiring to communicate with another station of said network, (a) transmitting, on plural ones of said K communication frequencies in sequence, a probe message containing a first symbol representative of the identity of said any station and a second symbol representative of the identity of said another station; and at each station that is in an idle mode, (b) sequentially monitoring each of said K communication frequencies for a probe message containing a second symbol representative of the identity of that station; and (c) in response to detecting, in step (b), a probe message containing a second symbol representative of the identity of that station, transmitting, on plural ones of said K communication frequencies in sequence, a response message containing said first symbol and a third symbol representative of which of said K communication frequencies is to be used as the channel over which the station whose identity is represented by said first symbol and the station whose identity is represented by said second symbol are to communicate with one another, and wherein each of said symbols is in the form of a respective pseudo random code. - View Dependent Claims (15, 16, 17, 18, 19, 20, 21, 22, 23, 24, 25)
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26. For use in a multistation communication network containing a plurality of N stations each of which is capable of communicating with any other station of the network over any one of a plurality of K communication frequencies, a system for establishing a communication channel over one of said frequencies between a first station desiring to communicate with a second station of said network comprising:
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at said first station, first means for transmitting, on plural ones of said K communication frequencies in sequence, a probe waveform containing a first pseudo random code representative of the identity of said second station and a second pseudo random code representative of the identity of said first station; and at said second station, second means for sequentially monitoring each of said K communication frequencies for a transmission from said first station containing said first pseudo random code; and third means, coupled to said second means and responsive to said second means detecting a transmission from said first station containing said first pseudo random code, for transmitting, on plural ones of said K communication frequencies in sequence, a response waveform containing said second pseudo random code and a third pseudo random code representative of a prescribed one of said K communication frequencies to be used as the channel over which said first and second stations are to communicate with one another. - View Dependent Claims (27, 28, 29, 30, 31, 32, 33, 34, 35, 36, 37, 38)
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Specification