CONTROLADOR, UNIDADE ASSINANTE PARA USO EM UM SISTEMA DE COMUNICAÇÃO CDMA SEM FIO E MÉTODO PARA PERMITIR E ESTABELECER UMA CHAMADA EM GRUPO NO DITO SISTEMA

摘要

A controller (120), in response to receiving a request for a group call (201) targeting a group (101), allocates at least one power adjustment channel to the group call (202) and sends identification of the at least one power adjustment channel to at least some of the subscriber units in the group (203). Using the at least one power adjustment channel, the controller also sends unique power adjustment information to each of the at least some subscriber units (204). Unique power adjustment channel access information is also sent to the subscriber units so that each subscriber unit can receive its own unique power adjustment information (503) and adjust its inbound transmission power (504) in response. In this manner, efficient reverse power control is provided for multiple subscriber units thereby facilitating group calls in CDMA systems.