Patent ID: 6731620
Filing Date: 2004-05-04
Classification: H04W

Abstract:
A method for allocating reverse channel power in a W-CDMA (Wideband Code Division Multiple Access) WWL (Wireless Local Loop) system, the method comprising the steps of:(1) calculating a propagation path loss of a pilot channel depending on a maximum path loss of a reverse link for a base station located at a specific distance from a terminal, which is determined from a minimum Ec (energy per bit after channel coding), /It (total interference power) required by the system, a transmission antenna gain of the terminal, a reception antenna gain of the terminal, a reverse frequency reusing efficiency, a transmission output of the terminal, a number of active users, a power allocation ratio of the pilot channel, a bandwidth, and a thermal noise density; (2) calculating a power allocation ratio of a traffic channel depending on a propagation path loss of the pilot channel, Eb (energy density per bit)/Nt (thermal noise density) of the traffic channel, the power allocation ratio of the pilot channel, a data rate of the traffic channel, the bandwidth, and the reverse frequency reusing efficiency; (3) calculating a power allocation ratio of an automatic power control (APC) channel depending on the propagation path loss of the pilot channel, Eb/Nt of the APC channel, the power allocation ratio of the pilot channel, a data rate of the APC channel, the bandwidth, and the reverse frequency reusing efficiency; and, (4) calculating a power allocation ratio of an other wire (OW) channel depending on the propagation path loss of the pilot channel, Eb/Nt of the OW channel, the power allocation ratio of the pilot channel, a data rate of the OW channel, the bandwidth, the reverse frequency reusing efficiency.