Patent ID: 7079510
Filing Date: 2006-07-18
Classification: H04J,H04W

Abstract:
1. A method for allocating a code in connection with soft handover in a CDMA system in downlink transmissions from a base transceiver station (BTS) to a mobile station (MS), the method comprising: allocating codes in the base transceiver station (BTS) according to a specific code tree, wherein a specific first spreading factor (SF=2) corresponds to each code (C allowing the base transceiver station to use said first spreading factor (SF=2) in code allocation in all downlink transmissions; allowing the base transceiver station to use both codes simultaneously (C limiting the use of said second spreading factor (SF=4) in code allocation in downlink transmissions when the receiving mobile station is in connection with at least two base transceiver stations (BS A, BS B) simultaneously so as to allow the base transceiver station to use only one (C