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Outer loop power control in a communication system

一种外环功率控制、通信方法的技术，应用在电信领域，能够解决技术不能提供满意或可靠结果、保持外环功率控制等问题

Active Publication Date: 2006-04-05
LUCENT TECH INC
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0017] The present invention addresses the need to maintain outer loop power control even when traffic channel conditions are such that previously developed techniques do not provide satisfactory or reliable results

Method used

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  • Outer loop power control in a communication system
  • Outer loop power control in a communication system
  • Outer loop power control in a communication system

Examples

Experimental program
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Embodiment Construction

[0026] figure 1 Selected portions of a communication system 20 are shown schematically. In this example, an outer loop power control section 22 is the part of the radio network controller for wireless data communications that sets thresholds on traffic channels to achieve a target packet error rate (PER). An example threshold includes signal-to-noise ratio (SIR). The mobile station compares the signal-to-noise ratio to a threshold value and responsively adjusts transmit power in a known manner using known techniques. The example shown includes the only way to set the threshold.

[0027] Receiver section 24 R-PDCH receives data packets on a traffic channel in a known manner. Receiver section 24 processes received packets in a known manner, including detecting whether any of the packets contain errors. The error event information is provided to the power control section 22 .

[0028] The illustrated example includes two traffic channel pattern detector sections 26 and 28 . ...

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PUM

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Abstract

The invention relates to the out-loop power control in a communication system, and the out-loop power control of a business channel includes using at least one output coming from the other business channel to determine proper control threshold values, when selected channel situations such as the SNR exist. An example business channel situation includes that no enough data transmission provides the direct measurement of the packet error rate, and another example business channel situation which is used for determining when to use other channel outputs is a transmission mode on the channel. Anexample output is the ratio of the energy and the noise of a code chip of a pilot channel which is interrelated with the channel.

Description

technical field [0001] The present invention relates generally to the field of telecommunications. Background technique [0002] The communication system may be based on hardwired connections, wireless signal transmission, or a combination of both. Some systems are capable of handling voice communications. Some are capable of handling data communications. Some are capable of handling more than one type of communication (ie voice and data). [0003] In data communication systems, information bits are usually combined into a frame or packet format and transmitted to the receiver. For example received packets may be lost or contain errors due to a noisy channel used to transmit the data. Packet Error Rate (PER) is the percentage of received packets that contain errors. [0004] Known systems determine PER directly by counting the number of lost or erroneous packets during a time interval. In many cases, however, it is not possible to adequately determine PER using direct ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H04B7/005H04W52/12H04W52/16
CPCH04W52/16H04W52/12H04L5/0048H04W52/08H04W52/10H04W52/125
Inventor 毕奇崔东哲张沁磬
Owner LUCENT TECH INC