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A method and apparatus for uplink power control in a wireless communication network

A wireless communication network and power control command technology, applied in wireless communication, power management, electrical components, etc., can solve problems such as instability, unsatisfied SINR goals, and insignificant data rate self-interference

Active Publication Date: 2012-09-12
TELEFON AB LM ERICSSON (PUBL)
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Third, data rate selection based on a fixed relationship between power and rate assumes that self-interference is not significant
This technique by itself does not address the power instability problem, since self-interference would cause the SINR target to not be met

Method used

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  • A method and apparatus for uplink power control in a wireless communication network
  • A method and apparatus for uplink power control in a wireless communication network
  • A method and apparatus for uplink power control in a wireless communication network

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Embodiment Construction

[0032] figure 1 A base station 10 is shown configured for use in a wireless communication network. For example, in one or more embodiments, base station 10 comprises a NodeB in a Wideband Code Division Multiple Access (WCDMA) network. Base station 10 is configured to provide uplink power control for mobile terminals 12 . Only one mobile terminal 12 is shown, but those skilled in the art will understand that the base station 10 is capable of supporting a large number of mobile terminals 12 in which the uplink power control of the invention presented herein is included.

[0033] The transceiver circuitry 14 contained in the illustrated base station 10 allows it to receive uplink signals from the mobile terminal 12 and transmit downlink signals to the mobile terminal 12 . The base station 10 also includes one or more processing circuits 16 operatively associated with the transceiver circuit 14 and configured to generate a first power control command for the mobile terminal 12, ...

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Abstract

A method and apparatus provide advantageous uplink power control for a set of uplink channels transmitted by a mobile terminal or other item of user equipment (UE). The proposed uplink power control maintains the total received power for the set of uplink channels at or about a target received power, while also maintaining the received signal quality for a subset of those channels---e.g, a particular one of them---at or about a target received signal qualify. In an advantageous but non-limiting example embodiment, the subset comprises a fixed-rate control channel, and the set includes that control channel and a variable-rate traffic channel Correspondingly, a base station generates first power control commands to maintain the received signal quality of the control channel at or about some quality target, and generates second power control commands to maintain the total received power (of the two channels) at or about some power target.

Description

technical field [0001] The present invention relates generally to wireless communication networks and, in particular, to transmit power control in such networks. Background technique [0002] Common power control schemes in interference-limited communication systems rely on the receiver to send power control commands back to the transmitter. Commands streamed back from the receiver tell the transmitter to incrementally increase or decrease its transmit power on an ongoing basis, as needed to maintain a certain reception metric of the transmitter's signal received by the receiver. Received signal quality expressed as signal-to-noise ratio (SNR) or signal-to-interference-plus-noise ratio (SINR) is a common reception metric. [0003] Like many aspects of wireless communication system operation, power control becomes increasingly complex as data rates increase. For example, Wideband Code Division Multiple Access (WCDMA) was originally developed for circuit voice and moderate d...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H04W52/08H04W52/24H04W52/14H04W52/28H04W52/20H04W52/26H04W52/32
CPCH04W52/08H04W52/146H04W52/20H04W52/245H04W52/265H04W52/267H04W52/286H04W52/325
Inventor G·E·博顿利S·格兰特M·赫克王怡彬
Owner TELEFON AB LM ERICSSON (PUBL)
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