Up-link power control for fixed wireless access
First Claim
1. A radio communications power control system for controlling up-link signal power transmitted between an outstation and a base station, wherein the control system employs a power control algorithm, the transmitted signal power being controlled to be proportional to a product of loss due to free space (LossFS) and loss due to shadowing and interface (Loss SI), and wherein the algorithm is expressed as:
15 Assignments
0 Petitions
Accused Products
Abstract
This invention relates to radio communication networks and more particularly, to up-link power control for fixed wireless access communication networks. In accordance with one aspect of the invention there is provided a radio communications uplink power control system wherein distance information between an outstation and a base station and information relating to channel loss is employed by a power control algorithm whereby the signal power transmitted can be optimally controlled. The present invention provides a power control strategy which adapts not only to the total channel loss, but separately to the components of this loss. The total channel loss is calculated from the difference in the received signal power and the transmitted signal power (which is encoded in the message, or sent in addition to the message and therefore known to the receiving station). A method of operation is also disclosed.
30 Citations
11 Claims
- 1. A radio communications power control system for controlling up-link signal power transmitted between an outstation and a base station, wherein the control system employs a power control algorithm, the transmitted signal power being controlled to be proportional to a product of loss due to free space (LossFS) and loss due to shadowing and interface (Loss SI), and wherein the algorithm is expressed as:
-
5. A radio communications network power control system, the network comprising a base station and a out station, wherein information relating to the distance between an outstation and a base station and
information relating to channel excess loss is employed by the following power control algorithm:
- 6. In a radio communications power control system for controlling uplink signal power, a method of controlling transmitted signal power by employing a power control algorithm utilising distance information between an outstation and a base station and information relating to channel loss, the transmitted signal power being controlled to be proportional to a product of loss due to free space (LossFS) and loss due to shadowing and interference (LossSI), wherein the algorithm is expressed as:
-
11. A method of controlling power in a radio communications network power control system, the network comprising a base station and a out station, wherein information relating to the distance between an outstation and a base station and information relating to channel excess loss is employed by the power control system according to the following power control algorithm:
Specification