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Method and system for controlling uplink power

A technology of power control and transmit power, applied in the field of power control, can solve the problems of occupying cell resources, easily resulting in dropped calls, and increasing soft handover between indoor cells and outdoor cells, etc., to achieve the effect of improving the effect and reducing interference.

Active Publication Date: 2010-11-24
SHANGHAI HUAWEI TECH CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

It can be seen that the increase of pilot power in indoor cells will lead to a large increase in soft handover between indoor cells and outdoor cells, occupying a large amount of cell resources, and in the process of soft handover, it is easy to cause call drop and other phenomena that affect user performance

Method used

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  • Method and system for controlling uplink power
  • Method and system for controlling uplink power
  • Method and system for controlling uplink power

Examples

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example 1

[0078] Example 1: In the case that there are communication signals in the outdoor network, calculate the interference of indoor communication on the outdoor network, that is, estimate the interference signal leaked out of the downlink.

[0079] According to the power control algorithm in this embodiment, the downlink signal leaked from the indoor cell minus the wall penetration loss and the loss in the propagation law of indoor and outdoor signals is the leaked interference signal. The propagation law of indoor and outdoor signals, that is, the relationship between indoor and outdoor attenuation and distance, such as Figure 6 shown. Figure 6 The specific values ​​correspond to Table 1.

[0080] R(m)

L(dB, outdoor)

L (dB, indoor)

0.1

34.21602904

-7

1

-44.21602904

-37

2

-47.226329

-46.03089987

3

-48.98724159

-51.31363764

4

-50.23662895

-55.06179974

5

-51.20...

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Abstract

The invention discloses a method and a system for controlling uplink and downlink power, which relate to the field of wireless communication and can reduce the outdoor interference caused by indoor communication. According to the invention, according to downlink signal sampling data of an adjacent cell, a downlink interference control threshold corresponding to an indoor cell is calculated; according to the downlink signal sampling data of the indoor cell, an uplink interference control threshold corresponding to the indoor cell is calculated; during power control, judgment for downlink and / or downlink transmission power is implemented on a terminal inside the indoor cell, if the downlink transmission power of network side to the terminal is larger than the downlink interference control threshold according to the power control judgment result after the power control, power adjustment is not performed according to the judgment result, instead, the downlink transmission power of the terminal is adjusted to the downlink interference control threshold. And if the uplink transmission power of the terminal is larger than the uplink interference control threshold according to the power control judgment result after the power control, the uplink transmission power of the terminal is adjusted to the uplink interference control threshold.

Description

technical field [0001] The invention relates to the field of wireless communication, in particular to power control technology. Background technique [0002] Code Division Multiple Access (CDMA for short) communication system occupies a pivotal position in mobile communication, especially in the third generation of mobile communication (The Third Generation, referred to as "3G"), the three relatively mature standards All belong to the category of CDMA. In a CDMA system, because all users share the same frequency, the mutual interference problem is prominent, so power control is very critical. Whether it is uplink or downlink, it is very necessary to keep the transmit power at the minimum power level that can meet the communication quality requirements, because too small power will cause users to be dissatisfied with the communication quality, and too much power will reduce the operational efficiency of the communication system . [0003] There are generally two power cont...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H04W16/20H04W52/14
Inventor 陈新钟华正
Owner SHANGHAI HUAWEI TECH CO LTD
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