Secondary synchronization sequences for cell group detection in a cellular communications system

  • US 7,961,709 B2
  • Filed: 12/07/2007
  • Issued: 06/14/2011
  • Est. Priority Date: 01/08/2007
  • Status: Active Grant
First Claim
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1. A method of indicating timing parameters and an identity of a particular cell group from a number, M, of possible cell groups in a signal transmitted in a cellular communication system that employs a radio frame in a physical layer, the radio frame comprising a number of time slots, the method comprising:

  • transmitting, in a known one of the time slots of the radio frame, a synchronization signal, S1, that comprises a pair of sequences, {tilde over (S)}i, {tilde over (S)}j arranged in a first ordering; and

    transmitting, in another known one of the time slots of the radio frame, a synchronization signal, S2, that comprises the pair of sequences, {tilde over (S)}i, {tilde over (S)}j arranged in a second ordering,wherein;

    each member of the pair of sequences, {tilde over (S)}i, {tilde over (S)}j is selected from a group comprising Nseq different sequences, wherein Nseq is at least ceil

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