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Power control method in CDMA communication system

A communication system and power control technology, which is applied in the direction of code division multiplexing system, multiplexing communication, communication between multiple stations, etc., can solve the problem of unable to perform power control, etc., and achieve improved link performance Effect

Inactive Publication Date: 2003-02-19
HUAWEI TECH CO LTD
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  • Abstract
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  • Claims
  • Application Information

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Problems solved by technology

[0013] The purpose of the present invention is to propose the uplink power control method and the downlink power control method under the compressed mode in the code division multiple access communication system in view of the power control command loss in the above-mentioned compressed mode transmission interval, resulting in the situation that power control cannot be performed, , can use the predictive method to control the power during the period when there is no power control command in the compressed mode, so as to improve the link performance, which is simple and easy

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  • Power control method in CDMA communication system
  • Power control method in CDMA communication system
  • Power control method in CDMA communication system

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Embodiment Construction

[0043] Such as Figure 4 As shown, the uplink power control method in the code division multiple access system proposed by the present invention refers to the transmission interval in the compressed mode when the downlink channel starts from the k+1th time slot, and the length of the transmission interval is L time slots, and at this stage The corresponding uplink channel is in the normal mode or in the non-transmission interval of the compressed mode, and the power control command memory set in the user equipment stores the power control command (TPC( i)), where m is the power control command memory capacity, and the user equipment will estimate the executable power control command (TPC cmd(k+ 1)).

[0044] When TPC(k-m+1) to TPC(k) are all 1, it is predicted that the current received power is in a deep fading period, and the trend of the current power command is increasing, then the executable power control command of the k+1th time slot of the uplink channel TPC_cmd(k+1)=...

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Abstract

This invention discloses a power control method in CDMA communication system. Customer devices or base stations store power control orders from them. When downstream stream channels are at compresses mode transmission internal and corresponding up-line or down-at normal mode or at untransmission interval of compressed mode, the customer device will use power control orders received from base stations before the transmission interval to estimate the executive power control orders for the present slot to control up-linear or downstream power thus to estimate power control trend by orders of power control before the transmission interval and forcast power control at the period of no power control orders for compressed mode to improve link performance.

Description

technical field [0001] The invention relates to mobile communication, in particular to a power control method in a code division multiple access communication system. Background technique [0002] With the development of mobile communication and the increasing demand for communication, the worldwide focus is on the third generation mobile communication system. The third-generation mobile communication system is a large family composed of different standard systems, including WCDMA, TD-SCDMA, cdma2000 and other protocol standards. [0003] Systems operating on these different standards cannot be isolated from each other, but must be able to interoperate with each other. In addition, GSM will exist for a long time as the 2G system with the widest coverage at present, and the intercommunication between it and the 3G system is also an important issue. However, there are large differences in the protocol specifications of these systems. For example, the uplink and downlink tra...

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H04B7/005H04B7/26
Inventor 吴更石朱静宁
Owner HUAWEI TECH CO LTD