Method and system for autonomously allocating a frequency hopping traffic channel in a private radio system

A method for determining a least-interfered communications link between a private radio base station and a cellular mobile station, said private radio base station located within an area of said cellular mobile station, said private radio base station and said cellular mobile station sharing a multiplicity of frequencies for communication therein, said method comprising the steps of:

• determining a first set of candidate frequencies for use by said private radio base station within said area of the cellular mobile station;
• ordering said first set of candidate frequencies into a second set of candidate frequencies pursuant to a first interference measurement;
• expanding said second set of candidate frequencies into a third set containing a multiplicity of frequency and timeslot pairings pursuant to a second interference measurement, each candidate frequency in said second set having a plurality of timeslots associated therewith;
• dividing said third set of said pairings into a plurality of frequency hop lists, each of said frequency hop lists containing a plurality of frequencies from said third set associated with a particular timeslot within said pairings, wherein, in said step of dividing said third set, the number of said plurality of frequency hop lists equals the number of timeslots in a multislot digital transmission frame;
• and
• selecting one of said frequency hop lists as the least-interfered communications link for said private radio base station.

In a communication system having a cellular mobile station and a private radio base station, said private radio base station being located within an area of said cellular mobile station, circuitry within said private radio base station for allocating a least-interfered communications link between said private radio base station and said cellular mobile station, where said private radio base station and said cellular mobile station share frequencies, said circuitry comprising:

• a first determining means for determining a first set of candidate frequencies for use by said private radio system within said area of said cellular mobile station;
• a first ordering means for ordering said first set of candidate channels into second set of candidate frequencies pursuant to a first interference measurement;
• expanding means for expanding said second set of candidate frequencies into a third set containing a multiplicity of frequency and timeslot pairings pursuant to a second interference measurement, each candidate frequency in said second set having a plurality of timeslots associated therewith;
• a dividing means for dividing said third set of pairings into a plurality of frequency hop lists, each of said frequency hop lists containing a plurality of frequencies from said third set associated with a particular timeslot within said pairings, wherein said dividing means further comprises an averaging means for averaging the signal strengths of said frequency/timeslot pairings within said third set over a plurality of seconds, wherein said frequency/timeslot pairings within said pairings subset are reordered;
• a second selecting means for selecting a subset of said pairings from said third set, said candidate frequencies within said third set pairings having an associated signal interference value less than a given interference value being selected for said pairings subset, said pairings subset comprising said plurality of frequency hop lists for said dividing means;
• and
• selecting means for selecting one of said frequency hop lists as the least-interfered communications link for said private radio base station.

In a communication system having a cellular mobile station and a private radio base station, said private radio base station being located within an area of said cellular mobile station, circuitry within said private radio base station for allocating a least-interfered communications link between said private radio base station and said cellular mobile station, where said private radio base station and said cellular mobile station share frequencies, said circuitry comprising:

• a first determining means for determining a first set of candidate frequencies for use by said private radio system within said area of said cellular mobile station;
• a first ordering means for ordering said first set of candidate channels into second set of candidate frequencies pursuant to a first interference measurement;
• expanding means for expanding said second set of candidate frequencies into a third set containing a multiplicity of frequency and timeslot pairings pursuant to a second interference measurement, each candidate frequency in said second set having a plurality of timeslots associated therewith;
• a dividing means for dividing said third set of pairings into a plurality of frequency hop lists, each of said frequency hop lists containing a plurality of frequencies from said third set associated with a particular timeslot within said pairings, wherein the number of said plurality of frequency hop lists equals the number of timeslots in a multislot digital transmission frame;
• and
• selecting means for selecting one of said frequency hop lists as the least-interfered communications link for said private radio base station.