Method and apparatus of power control in a CDMA dispatch system
First Claim
1. A method of power control and efficient resource allocation of a base station in a dispatch system comprising the steps of:
- monitoring a multiple user access communication channel to detect a request for increased power; and
decreasing a power level at which a forward link broadcast signal is transmitted if no request for increased power is detected during a first period of time.
1 Assignment
0 Petitions
Accused Products
Abstract
In a dispatch system, power of the forward link broadcast channel transmitted from a base station is controlled such that the power level is the minimum necessary and such that transmission of the forward link broadcast channel is terminated if no remote unit is located within the coverage area of the base station. In addition to transmitting a forward link broadcast signal, the base station monitors an access channel. A first remote unit in the base station coverage area receives and decodes the forward link broadcast signal. The first remote unit determines a signal quality of said forward link broadcast signal. If the signal quality is unacceptable, the remote unit transmits a power request access message. The base station responds to the request by increasing the transmission power of forward link broadcast channel. If no requests are received at the base station, the forward link broadcast channel is slowly decreased to a minimum. Transmission of the forward link broadcast channel may be terminated completely.
-
Citations
15 Claims
-
1. A method of power control and efficient resource allocation of a base station in a dispatch system comprising the steps of:
-
monitoring a multiple user access communication channel to detect a request for increased power; and decreasing a power level at which a forward link broadcast signal is transmitted if no request for increased power is detected during a first period of time. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10)
-
-
11. A system for conserving base station resources in a dispatch system configured to service remote units comprising:
-
a base station that monitors an access channel and cyclically reduces a power level of a forward link broadcast signal if no request for increased power is detected on said access channel; and a remote unit that receives said forward link broadcast signal and transmits said request for increased power if a signal level of said forward link broadcast signal crosses a threshold value.
-
-
12. An apparatus for power control and efficient resource allocation of a base station in a dispatch system comprising:
-
means for monitoring a multiple user access communication channel; means for detecting a request for increased power over said multiple user access communication channel; and means for decreasing a power level at which a forward link broadcast signal is transmitted if no request for increased power is detected during a first period of time. - View Dependent Claims (13, 14, 15)
-
Specification