UE (User Equipment) side uplink power control device and method in TD-SCDMA (Time Division-Synchronous Code Division Multiple Access) system

A TD-SCDMA, closed-loop power control technology, applied in the field of code division multiple access systems, can solve the problems of complex power calculation and system performance impact, and achieve the effect of improving power accuracy, improving accuracy and reducing the amount of calculation.

Inactive Publication Date: 2013-08-07
SANECHIPS TECH CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The power calculation in open-loop power control is a complicated process, especially when it involves different coded transmission channels of different services (including HSDPA (High Speed ​​Downlink Package Access, high-speed downlink packet access)), the power calculation is more complicated , using different calculation methods has a greater impact on the performance of the system

Method used

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  • UE (User Equipment) side uplink power control device and method in TD-SCDMA (Time Division-Synchronous Code Division Multiple Access) system
  • UE (User Equipment) side uplink power control device and method in TD-SCDMA (Time Division-Synchronous Code Division Multiple Access) system
  • UE (User Equipment) side uplink power control device and method in TD-SCDMA (Time Division-Synchronous Code Division Multiple Access) system

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Embodiment Construction

[0045] Below in conjunction with accompanying drawing and preferred embodiment, the present invention is described in further detail:

[0046] Such as figure 1 As shown, it is a schematic diagram of the UE side uplink power control device in the TD-SCDMA system according to the present invention. The uplink power control device includes an interface module and an uplink power control processing module, wherein the interface module includes an upper layer interface submodule and measurement interface sub-module; the uplink power control processing module includes an open-loop power control sub-module, a TPC extraction number sub-module, a closed-loop power control sub-module, a path loss calculation sub-module, a spreading factor gain calculation sub-module, and a coding combination gain calculation sub-module module and power summation sub-module; where,

[0047] The upper layer interface sub-module is used to receive the DPCH configuration and uplink dedicated physical chann...

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Abstract

The invention relates to UE (User Equipment) side uplink power control device and method in a TD-SCDMA (Time Division-Synchronous Code Division Multiple Access) system. The UE side uplink power control device comprises an interface module and an uplink power control processing module. The UE side uplink power control method comprises the following steps of: calculating open loop power PDPCH of each uplink time-slot code composite transmission channel CCTrCH of the current subframe when the uplink power control processing module controls the open loop power after receiving the power intensity of a received chip of a main public physical channel; regulating the transmitting power of a corresponding time slot in the next subframe according to the PDPCH; judging whether a downlink time-slot power control command is extracted or not; if so, entering closed-loop power control from the open-loop power control; calculating the closed-loop power of the uplink time slot CCTrCH; and regulating the transmitting power of the corresponding time slot in the next subframe according to the obtained closed-loop power. The invention not only reduces calculation amount, but also increases the power precision, thereby increasing the power control accuracy, improving the call quality and avoiding call drop.

Description

technical field [0001] The present invention relates to a code division multiple access system, in particular to a method for realizing uplink power control on a UE (User Equipment, user equipment) side in a TD-SCDMA (TimeDivision-Synchronous Code Division Multiple Access, Time Division Synchronous Code Division Multiple Access) system Devices and methods. Background technique [0002] Power control is one of the most important requirements in cellular systems. In most systems, both the base station and the UE can dynamically adjust power in real time to improve system performance. The TD-SCDMA system is an interference-limited system. Due to the near-far effect, the capacity of the TD-SCDMA system is mainly limited by the interference between the UE and the base station in the system. Therefore, if the signal of each UE reaches the base station, the guaranteed The minimum signal-to-noise ratio required for communication quality and keep the system synchronous, then the ca...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H04W52/08H04W52/10H04W52/14
Inventor 张道垠
Owner SANECHIPS TECH CO LTD
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