Patent ID: 8798030
Filing Date: 2014-08-05
Classification: H04B,H04W

Abstract:
1. A method for uplink synchronization in a multi-carrier time division-synchronous code division multiple access (TD-SCDMA) system, said method comprising: performing uplink synchronization for a first frequency in said multi-carrier TD-SCDMA system to determine a first timing advance for said first frequency; receiving, at a first time, a first downlink transmission on said first frequency in said multi-carrier TD-SCDMA system; receiving, at a second time, a second downlink transmission on at least one secondary frequency in said multi-carrier TD-SCDMA system, in which said second time is different from said first time; measuring a timing offset as a difference between said first time and said second time; scheduling uplink transmissions on said first frequency at a third time based on the first timing advance; and scheduling uplink transmissions on said at least one secondary frequency at a fourth time that is offset from the third time by the timing offset.