Patent ID: 7558238
Filing Date: 2009-07-07
Classification: H04B,H04W

Abstract:
1. A method for partitioning communication resource among multiple users comprising: partitioning at least a portion of an available communication resource into first mode time-frequency slots and second mode time frequency slots; and allowing multiple users to transmit in the first mode time-frequency slots using time division multiplexing and in the second mode time-frequency slots using spreading codes that are bounded by the respective second mode time-frequency slot, wherein each of the time-frequency slots comprise a plurality of pilot symbols that are not all adjacent in time, wherein the first mode time-frequency slots each comprise a concatenated series of time sub-slots in which the multiple users may separately transmit and a pilot symbol is present in less than all time sub-slots, and wherein the second mode time-frequency slots each comprise a plurality of spread spectrum code sub-slots in which the multiple users may separately transmit and each code sub-slot comprises a plurality of pilot symbols.