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Reuse of a physical control channel in a distributed cellular radio communication system

  • US 6,108,550 A
  • Filed: 06/12/1998
  • Issued: 08/22/2000
  • Est. Priority Date: 06/13/1997
  • Status: Expired due to Term
First Claim
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1. A method for the reuse of physical control channels in at least one cell in a distributed cellular radio communication system, said distributed cellular radio communication system comprising at least one mobile station and a number of radio units, wherein at least one cell comprises a number of radio units controlled by at least one central unit, said mobile stations communicating with said radio units through connections comprising physical uplink and downlink channels, wherein said physical uplink and downlink channels transfer logical uplink and downlink channels, respectively and wherein at least one physical uplink channel and at least one physical downlink channel in the cell are designated as the physical uplink control channel and the physical downlink control channel respectively, for transferring logical uplink and downlink control channels respectively, said method in each cell comprising the following steps:

  • a) simultaneously receiving signals on the physical uplink control channel for each radio unit, wherein said received signals can transfer different information;

    b) identifying the type of logical uplink channels transmitted on said physical uplink control channel;

    c) interpreting the information in the logical control channel of the type access channel, referred to as the logical access channel wherein said information comprises a request for contact with the radio communication system;

    d) generating logical downlink control channels in dependence of said interpretation;

    e) mapping the logical downlink control channels mentioned in step d) onto the physical downlink control channel for each radio unit;

    f) simultaneously transmitting signals on the physical downlink control channel from each radio unit, whereby different information in the logical downlink control channels may be transmitted on the physical control channel from different radio units in the cell.

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