Patent ID: 7869454
Filing Date: 2011-01-11
Classification: H04B,H04J,H04W

Abstract:
1. A method for data transmission by a base station, the method comprising the steps of: upon receipt of an assignment request of a data channel from a mobile station, determining a secondary scrambling code identifier (ID); transmitting the secondary scrambling code ID to the mobile station; generating a primary scrambling code corresponding to a primary scrambling code ID using the primary scrambling code ID by one to one mapping the primary scrambling code ID to the primary scrambling code; generating a secondary scrambling code using the primary scrambling code ID and the secondary scrambling code ID by one to one mapping a combination of the secondary scrambling code ID and the primary scrambling code ID to the secondary scrambling code, wherein at least one secondary scrambling code depends on the corresponding primary scrambling code; scrambling a common channel using the primary scrambling code for identifying the base station; scrambling the data channel using the secondary scrambling code; and transmitting the scrambled common and data channel.