Method and apparatus for code assignment in a spread spectrum wireless communication system

A wireless communication system incorporating a LAS-CDMA protocol, comprising:

• a first cell, the first cell being assigned a first subset of LS codes;
• and
• a second cell, the second cell being assigned a second subset of LS codes,
• wherein the first and second subsets have a null cross-correlation within a predetermined interference free window.

In a Large Area Synchronized-Code Division Multiple Access wireless communication system, a method comprising:

• transmitting a first communication within a first cell, the first communication identifying at least one mobile station within the first cell by a first LS code within a first subset of LS codes;
• and
• transmitting a second communication within a second cell, the second communication identifying at least one mobile station within the second cell by a second LS code within a second subset of LS codes;
• wherein a cross-correlation between any two LS codes within the first is null within an interference free window, and the cross-correlation between any two LS codes within the second subset is null within the interference free window.

A controller in a Large Area Synchronized-Code Division Multiple Access wireless communication system, comprising:

• a first set of instructions for determining an interference free window size for communications between neighboring cells;
• and
• a second set of instructions for determining at least two sets of LS codes based on the interference free window size, a first set for identifying mobile stations in a first cell and a second set for identifying mobile stations in a neighboring cell;
• wherein the LS codes within the two sets of LS codes have a null cross-correlation within an interference free window.

In a Large Area Synchronized-Code Division Multiple Access wireless communication system, the system having a first cell and a first cell neighborhood, a computer data signal embodied on a carrier wave, the signal comprising:

• a first portion comprising header information for transmission to a first mobile user in a first cell;
• and
• a second portion comprising a first LS code corresponding to the first mobile user, the first LS code being part of a first set of LS codes, and
• wherein within the first cell neighborhood, the first LS code is assigned only to the first cell.

In a wireless communication system incorporating a LAS-CDMA protocol, a first cell, comprising:

• a first set of computer readable instructions adapted to receive a first LS code set, the first LS code set having a plurality of LS codes of a predetermined first length, wherein each of the plurality of LS codes in the first LS code set has a null cross-correlation with respect to each other LS code in the first LS code set;
• and
• a second set of computer readable instructions adapted to generate a data signal on a carrier wave, the data signal comprising:
• a first portion comprising header information for transmission to a first mobile within the first cell;
• and
• a second portion comprising a first LS code corresponding to the first mobile user, the first LS code being part of the first LS code set.