Methods and apparatus for encoding and transmitting mobile device location information

A mobile wireless device comprising:

• means for selecting based on a location of the device a first codeword from a first codebook, said first codeword corresponding to a first geographic area;
• means for selecting based on the location of the device a second codeword from a second codebook, said second codeword corresponding to a second geographic area;
• and
• means for transmitting said first and second codewords, the intersection of the first and second areas to which the first and second codewords correspond indicating the location of the device.

A computer program product for use in a mobile wireless device, the computer program product comprising:

• a non-transitory computer readable medium comprising:
• code for causing at least one computer to select, based on a location of the device, a first codeword from a first codebook, said first codeword corresponding to a first geographic area;
• code for causing said at least one computer to select, based on the location of the device, a second codeword from a second codebook, said second codeword corresponding to a second geographic area;
• and
• code for causing said at least one computer to transmit said first and second codewords, the intersection of the first and second areas to which the first and second codewords correspond indicating the location of the device.

A mobile wireless device comprising:

• at least one processor configured to:
• select, based on a location of the device, a first codeword from a first codebook, said first codeword corresponding to a first geographic area;
• select, based on the location of the device, a second codeword from a second codebook, said second codeword corresponding to a second geographic area;
• and
• transmit said first and second codewords, the intersection of the first and second areas to which the first and second codewords correspond indicating the location of the device;
• and
• memory coupled to said at least one processor.

A method of operating a first device to determine the location of a second device, comprising:

• receiving a peer discovery signal from said second device providing a codeword communicating location information;
• selecting, based on a user identifier or device identifier associated with the received peer discovery signal, which one of a plurality of user specific sets of codeword to location mapping information to use in interpreting the received codeword;
• and
• determining a location of the second device indicated by the received codeword from the selected one of the user specific sets of codeword to location mapping information.

A first device comprising:

• means for receiving a peer discovery signal from a second device providing a codeword communicating location information;
• means for selecting, based on a user identifier or device identifier associated with the received peer discovery signal, which one of a plurality of user specific sets of codeword to location mapping information to use in interpreting the received codeword;
• and
• means for determining a location of the second device indicated by the received codeword from the selected one of the user specific sets of codeword to location mapping information.

A computer program product for use in a first device, the computer program product comprising:

• a non-transitory computer readable medium comprising:
• code for causing at least one computer to receive a peer discovery signal from a second device providing a codeword communicating location information;
• code for causing said at least one computer to select, based on a user identifier or device identifier associated with the received peer discovery signal, which one of a plurality of user specific sets of codeword to location mapping information to use in interpreting the received codeword;
• and
• code for causing said at least one computer to determine a location of the second device indicated by the received codeword from the selected one of the user specific sets of codeword to location mapping information.

A first device comprising:

• at least one processor configured to:
• receive a peer discovery signal from a second device providing a codeword communicating location information;
• select, based on a user identifier or device identifier associated with the received peer discovery signal, which one of a plurality of user specific sets of codeword to location mapping information to use in interpreting the received codeword;
• and
• determine a location of the second device indicated by the received codeword from the selected one of the user specific sets of codeword to location mapping information;
• and
• memory coupled to said at least one processor.

A method of operating a device to transmit location information, the method comprising:

• determining, based on the location of said device, first location information to transmit;
• determining, based on the location of said device, second location information to transmit, said second location information indicating a second geographic area which intersects a first geographic area indicated by said first location information;
• transmitting the first location information at a first power level and at a first coding rate;
• and
• transmitting the second location information at a second power level and at a second coding rate, at least one of:
• the second power level being lower than said first power level and the second coding rate being higher than said first coding rate.

A mobile wireless device comprising:

• means for determining, based on the location of said device, first location information to transmit;
• means for determining, based on the location of said device, second location information to transmit, said second location information indicating a second geographic area which intersects a first geographic area indicated by said first location information;
• means for transmitting the first location information at a first power level and at a first coding rate;
• and
• means for transmitting the second location information at a second power level and at a second coding rate, at least one of:
• the second power level being lower than said first power level and the second coding rate being higher than said first coding rate.

A computer program product for use in a mobile wireless device, the computer program product comprising:

• a non-transitory computer readable medium comprising:
• code for causing at least one computer to determine, based on the location of said device, first location information to transmit;
• code for causing said at least one computer to determine, based on the location of said device, second location information to transmit, said second location information indicating a second geographic area which intersects a first geographic area indicated by said first location information;
• code for causing said at least one computer to transmit the first location information at a first power level and at a first coding rate;
• and
• code for causing said at least one computer to transmit the second location information at a second power level and at a second coding rate, at least one of:
• the second power level being lower than said first power level and the second coding rate being higher than said first coding rate.

A mobile wireless device comprising:

• at least one processor configured to:
• determine, based on the location of said device, first location information to transmit;
• determine, based on the location of said device, second location information to transmit, said second location information indicating a second geographic area which intersects a first geographic area indicated by said first location information;
• transmit the first location information at a first power level and at a first coding rate;
• and
• transmit the second location information at a second power level and at a second coding rate, at least one of:
• the second power level being lower than said first power level and the second coding rate being higher than said first coding rate;
• and
• memory coupled to said at least one processor.