Power overloading control method

An overload control and power technology, applied in the direction of transmission control/equalization, etc., can solve the problems of increased transmit power, little contribution to system overload, and mobile station dropped calls, etc. call rate effect

Inactive Publication Date: 2007-01-10
ZTE CORP
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  • Summary
  • Abstract
  • Description
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Problems solved by technology

Although this method can prevent overloading, for a mobile station with a good forward link, its transmit power on the forward traffic channel is low, so the increase of its transmit power is limited at this time. The call drop of the mobile station increases the call drop rate of the system, and because its transmission power is very small, it does not make much contribution to reducing the overload of the system after the call drop, so it cannot effectively relieve the overload state

Method used

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Embodiment Construction

[0022] The present invention will be described in detail below in conjunction with the accompanying drawings and embodiments.

[0023] When the system is overloaded, the base station judges the quality of the link where the forward traffic channel is located by collecting parameters reflecting the quality of the wireless link. These parameters can be (1) the current transmission power of the forward traffic channel at the moment of overload; (2) the chip energy and total received power spectral density (EcIo) of the forward pilot channel at the moment of overload; (3) the power of the forward traffic channel at the moment of overload Current bit energy and total noise power spectral density (EbNt).

[0024] Figure 1a Shown is the flow chart of judging the quality of each user link as the judgment condition of the current transmit power of the forward traffic channel, including the following steps:

[0025] Step 101, collecting the current transmit power of the forward traffi...

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Abstract

The invention discloses method for controlling power over loading. The method includes steps: when system over loading occurs, base station obtains current transmission power in each forward service channel; collecting parameters of reflecting quality of wireless link, and dividing link of each forward service channel into several levels based on the quality; the better of quality, the higher level is; based on the level of link of each forward service channel, setting up upper limit of transmission power for each channel, the higher level of the link, the larger difference between upper limit of transmission power and current transmission power will be setup. Thus, when system over loading occurs, the method guarantees normal telephony for better link first. Releasing bad link to moderate over loading situation effectively, the method lowers system rate of call failure.

Description

technical field [0001] The invention relates to a power overload control method, in particular to a forward power overload control method of a CDMA communication system. Background technique [0002] In a CDMA mobile communication system, a base station in a cell can simultaneously establish forward traffic channels with multiple mobile stations. Each forward traffic channel occupies a certain base station power to ensure normal communication. As the number of mobile stations in the cell increases, the total forward transmission power of the base station increases. When the total transmission power exceeds the predetermined rated power value of the base station, the base station equipment will work in a non-optimal state or even an abnormal state, and the forward transmission power cannot be guaranteed. The percentage of the pilot frequency to the total transmission power will cause problems such as coverage and handover, and will also increase the interference to the wirel...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H04B7/005
Inventor 李欣刘学敏
Owner ZTE CORP
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