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An adjusting method and device for pilot channel transmission power

A technology of pilot channel and transmit power, applied in the field of adjustment of pilot channel transmit power in wireless communication systems, can solve the problems of too small power setting of other channels, affecting communication quality, affecting other users' communication, etc., so as to enhance anti-interference. ability, ensure communication quality, and facilitate the effect of re-adjustment

Active Publication Date: 2008-05-28
HUAWEI TECH CO LTD
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AI Technical Summary

Problems solved by technology

Due to the complex wireless propagation environment, pilot signals from other cells will interfere with this cell. In the prior art, link budget or system simulation cannot accurately determine the power of the pilot channel of this cell, especially for indoor coverage. The complexity of the indoor propagation model is very high. It is more difficult for the link budget or coverage prediction simulation to accurately control the power of the pilot channel. The pilot power may be set too large or too small, so the coverage of the pilot signal cannot be accurately controlled. It is also impossible to control the communication range of the mobile station in the cell well.
[0007] Since CDMA is a self-interference system, if the pilot power is set too small, the coverage of the cell will be small, and the area where the mobile station can communicate is limited. In addition, the power of other channels may also be set too small accordingly, and the mobile station’s Downlink quality drops, affecting communication quality
If the pilot power is set too high, it will cause interference to adjacent base stations and mobile stations, affect the communication of other users, and also bring additional power loss, wasting system resources
In addition, if the wireless network environment changes, the calculation of link budget or system simulation to re-adjust the power is large and time-consuming
In this way, the wireless network cannot reach the optimal state quickly, and inappropriate power settings will lead to a decrease in system performance

Method used

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  • An adjusting method and device for pilot channel transmission power

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Embodiment Construction

[0019] In a system using code division multiple access (CDMA) technology, taking wideband code division multiple access (WCDMA) as an example, the present invention will be further described in combination with specific implementation modes. In the WCDMA system, the base station controller is called RNC, the base station is called Node B, and the RNC and Node B can be combined on the network side. In this system, the pilot channel is called Common Pilot Channel (CPICH, Common Pilot Channel). The process can refer to Figure 1:

[0020] Step 101, the mobile station initiates a call test;

[0021] When the mobile station initiates a call test, it calls a test number to connect to the network side. After the network side detects the test number, it automatically responds and sends a downlink co-frequency measurement control command to the mobile station. The above-mentioned automatic answering service can be provided by the network side itself, or can be handed over to some serv...

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Abstract

The utility model discloses a pilot channel transmitting power adjustment method which consists of the received signal code power RSCP value and the signal-to-interference Ec / Io value of the currently measured pilot channel, which are reported by a network profile receiving mobile platform; the transmitting power value of the pilot channel to be required is decided by the network profile according to the received RSCP value and the Ec / Io value; according to the transmitting power value of the pilot channel to be required, the transmitting power of the pilot channel is adjusted. The invention also provides a corresponding device. The method or the device of the invention can determine the transmitting power of the pilot channel of a base station with precision, thereby controlling the communication area of the control mobile platform and guaranteeing the community communication quality of the mobile platform in a mobile range.

Description

[0001] This application claims the priority of the Chinese patent application with the application number 200610062338.5 and the title of the invention "A Method for Adjusting the Transmitting Power of the Pilot Channel" submitted to the China Patent Office on August 26, 2006, the entire contents of which are hereby incorporated by reference In this application. technical field [0002] The present invention relates to the technical field of wireless communication, in particular to a method and a device for adjusting transmission power of a pilot channel in a wireless communication system. Background technique [0003] Code Division Multiple Access (CDMA) technology is an advanced wireless spread spectrum communication technology used in digital cellular mobile communication in recent years. It can meet the needs of operators for large-capacity, cost-effective and efficient mobile communication. The CDMA network is a cellular mobile phone network, which is composed of many c...

Claims

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Application Information

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IPC IPC(8): H04B7/005H04B7/26
CPCH04W52/343
Inventor 胡波朱伟钟华正
Owner HUAWEI TECH CO LTD
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