Control of the transmission power of a CDMA based system

Details Control of the transmission power of a CDMA based system Control of the transmission power of a CDMA based system

2006-11-14

2006-11-14

Maung, Nay (Department: 2618)

Telecommunications

Transmitter and receiver at separate stations

Plural transmitters or receivers

C455S013400, C455S069000, C455S127500, C455S343100, C455S346000, C455S436000, C455S574000, C370S335000, C370S342000

Reexamination Certificate

active

07136666

ABSTRACT:
A new and significantly improved approach for controlling the transmission power in the uplink direction of a CDMA-based radio system is disclosed, which provides a transmission power control even with regard to an overall link quality substantially involving a real time reaction on changes in the environment. A CDMA-based radio system is described which comprises an inner power control loop for adjusting the transmission power between a user equipment and at least one base station based on the signal to interference ratio to ensure that the signal to interference ratio is similar to a target signal to interference ratio at least within a predefined range and an outer power control loop for adjusting the target signal to interference ratio based on the link quality to ensure a target link quality necessary for fulfilling a predetermined quality of service in view of link quality at least within a predefined range. The outer power control loop is provided by establishing a first outer power control loop between the at least one base station and the user equipment and by establishing a second outer power control loop between an associated serving radio controller and the at least one base station.

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