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Methods and apparatus for cellular broadcasting and communication system

  • US 8,374,115 B2
  • Filed: 11/21/2011
  • Issued: 02/12/2013
  • Est. Priority Date: 03/25/2005
  • Status: Active Grant
First Claim
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1. In a multi-cell communication system, a method for data communication by a base station connected to a control server via a packet data network (PDN), the base station being one of a plurality of base stations serving a plurality of mobile stations in a plurality of cells, the method comprising:

  • maintaining a synchronized timing of radio transmission frames with other base stations of the plurality of base stations by synchronizing to a reference common to the plurality of base stations;

    receiving data distribution packets from the control server, each data distribution packet containing a synchronization protocol header with a packet sequence number and a time synchronization parameter;

    decoding the packet sequence numbers and restoring the sequential order of the received distribution data packets based on the packet sequence numbers;

    decoding the time synchronization parameters and determining start times for radio transmission frames based on the time synchronization parameters;

    determining whether a distribution data packet has been lost or received incorrectly, and, if a distribution data packet has been lost or received incorrectly, activating an error protection mechanism to avoid interfering with transmissions by other base stations in the plurality of base stations; and

    transmitting broadcast data using the same time-frequency resource as other base stations in the plurality of base stations in a single frequency network (SFN).

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