Power control method and device

A technology for power control and transmit power, which is used in transmission control/equalization, communication between multiple stations, sustainable buildings, etc., and can solve the problem that HS-PDSCH power control cannot be directly used.

Inactive Publication Date: 2010-01-27
TD TECH COMM TECH LTD
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Problems solved by technology

However, the technical problem to be solved by this method is to maximize the throughput of the cell, rather than to minimize the interference caused by the HS-PDSCH to adjacent cells under the premise of ensuring the service quality of the HS-PDSCH; There is also a big difference in the signal quality indicator (CQI) measurement and reporting mechanism of HS-PDSCH from the time division duplex (TDD) mode; therefore, the HS-PDSCH power control method in the existing FDD mode is not suitable for Power Control of HS-PDSCH in TDD Mode
[0004] In addition, due to the difference in signal processing between the dedicated physical channel (DPCH) and the HS-PDSCH, the power control method of the DPCH downlink channel in the existing TD-SCDMA system cannot be directly used for the power control of the HS-PDSCH

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Embodiment Construction

[0017] In order to make the object, technical solution and advantages of the present invention more clearly, the present invention will be further described in detail below in conjunction with the accompanying drawings and specific embodiments.

[0018] figure 1 It is a flowchart of a power control method in an embodiment of the present invention. Such as figure 1 As shown, the power control method in the embodiment of the present invention includes the following steps:

[0019] In step 101, the NodeB calculates the effective coding rate currently supported by the UE according to the CQI reported by the UE side.

[0020] In the embodiment of the present invention, the UE will measure the current channel quality on the resources allocated by the NodeB last time, for example, indicators such as the agreed information rate (CIR), and then according to the measured current channel quality, use the following The formula (1) is used to calculate the current single transmission th...

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Abstract

The embodiment of the invention discloses a power control method, which comprises that: a base station computes an effective code rate currently supported by user equipment according to CQI reported by a user equipment side; and the base station adjusts the transmission power of an HS-PDSCH according to the continuous changing condition of the effective code rate and a preset effective code rate threshold. The embodiment of the invention also discloses a power control device. The method and the device can reduce the transmission power of the HS-PDSCH as possible to reduce interference caused on adjacent cells by the HS-PDSCH under the condition that the quality of service of the HS-PDSCH is guaranteed, thus the power control on the HS-PDSCH in an FDD mode is realized; and simultaneously, the method and the device also can improve the overall performance of a system.

Description

technical field [0001] The present invention relates to mobile communication technology, in particular to a power control method and device. Background technique [0002] In order to meet the needs of high-speed data services in mobile networks, the Time Division Synchronous Code Division Multiple Access (TD-SCDMA) system introduces the High-Speed ​​Downlink Packet Access (HSDPA) technology, and adds the High-Speed ​​Physical Downlink Shared Channel (HS-PDSCH) , thus improving the spectrum utilization, capacity and data throughput of the system. Key technologies in HSDPA technology include: Adaptive Modulation Coding (AMC), Hybrid Automatic Repeat Request (HARQ) and downlink fast scheduling controlled by the base station (NodeB). Wherein, the fast downlink scheduling of the NodeB includes not only rate scheduling and physical resource scheduling (for example, the number of time slots and code channel conditions), but also includes downlink transmit power control based on us...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H04B7/005H04B7/26
CPCY02B60/50
Inventor 王亮王伟华赵春华
Owner TD TECH COMM TECH LTD
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