Patent ID: 6937559
Filing Date: 2005-08-30
Classification: H04B,H04J

Abstract:
1. A channel spreading device for a CDMA (Code Division Multiple Access) communication system, comprising: a plurality of channel transmission circuits; a memory for storing only orthogonal code numbers which cannot maintain orthogonality due to an orthogonal code which a circuit data user uses at a maximum data rate; and a controller for reading from the memory an orthogonal code number used at the maximum data rate to primarily allocate the read orthogonal code number such that circuit data is spread and transmitted by a corresponding one of the channel transmission circuits, when there is data transmission request from the circuit data user and a packet data user, and reading an available orthogonal code number out of the orthogonal code numbers stored in the memory to allocate the read orthogonal code number such that packet data is spread and transmitted by a corresponding one of the channel transmission circuits.