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Method and system for autonomously allocating frequencies to a radio system sharing frequencies with an overlapping macro radio system

  • US 6,405,048 B1
  • Filed: 02/05/1998
  • Issued: 06/11/2002
  • Est. Priority Date: 08/28/1996
  • Status: Expired due to Term
First Claim
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1. A method for determining a least-interfered radio communications link for a private radio system within a serving cell of an overlaying cellular system, the private radio system and the overlaying cellular system sharing a plurality of frequencies within said serving cell, said overlaying cellular system employing frequency hopping, the method comprising the steps of:

  • transmitting broadcast information on broadcast control channels (BCCHs);

    determining, using the broadcast information, a set of frequency hopping channels being used within a plurality of cells surrounding said serving cell of said overlaying cellular system;

    performing periodic received signal strength indicator (RSSI) measurements on BCCH carrier frequencies of a plurality of cells surrounding said serving cell, each said frequency hopping channel having at least one of said RSSI measurements associated therewith;

    dividing said set of frequency hopping channels into a plurality of frequency hopping lists, each said frequency hopping channel corresponding to a respective one of said frequency hopping lists, wherein each frequency hopping list has associated therewith the RSSI measurements that are associated with the corresponding frequency hopping channels of said frequency hopping lists;

    selecting a given one of said frequency hopping lists having the lowest maximum associated RSSI measurement value; and

    adaptively selecting a given frequency hopping channel from said given one of said frequency hopping lists as the least-interfered radio communications link for said private radio system.

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