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System and method for allocating frequency channels in a two-way messaging network

  • US 5,737,691 A
  • Filed: 07/14/1995
  • Issued: 04/07/1998
  • Est. Priority Date: 07/14/1995
  • Status: Expired due to Term
First Claim
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1. In a radio frequency communication network having a plurality of transmitter and receiver units for communication with a portable two-way selective call communication device, a method for allocating a plurality of frequency channels to a plurality of said transmitter units for which there is a demand that the transmitter units transmit messages comprising:

  • storing for each transmitter unit an interference data matrix including information identifying interfering transmitter units and for each of said interfering transmitter units a co-channel interference value and an adjacent channel interference value;

    calculating a transmitter priority value for each of said transmitter units, said transmitter priority value determining the order in which transmitter units are assigned a channel;

    calculating for each of said transmitter units a channel priority value for each of the frequency channels that the transmitter unit can access, said channel priority value determining the order in which an available channel is considered for assignment to the transmitter unit;

    determining whether a proposed available channel is acceptable for assignment to a given transmitter unit based upon the data stored in the interference matrix of said given transmitter unit for other transmitter units currently using the same channel as said proposed channel or a channel adjacent to said proposed channel upon the data stored in the interference matrices of other transmitter units currently using the same channel or a channel adjacent to said proposed channel for said given transmitter unit, and further upon the transmitter priority value and the channel priority value; and

    assigning said proposed channel to said transmitter unit if said proposed channel is determined to be acceptable.

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