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A fast power control method and base station for hsdpa in td-scdma system

A TD-SCDMA, fast technology, applied in power management, wireless communication, electrical components and other directions, can solve the problem of poor channel quality, not considering RTBS ​​transmit power, power waste, etc., to reduce interference and avoid downlink rate drop. Effect

Active Publication Date: 2016-01-20
TD TECH COMM TECH LTD
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  • Claims
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Problems solved by technology

However, when the channel quality is good, the UE does not need too much power. Transmitting with the set power may cause waste of power and cause interference to neighboring cells. When the channel quality is poor, the set transmit Power may cause insufficient power
[0007] Another method is to reduce the transmission power of HS-PDSCH when there is a surplus of downlink transmission power. However, when the channel quality deteriorates, compensation for RTBS ​​and transmission power is not considered, which will affect the downlink rate

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  • A fast power control method and base station for hsdpa in td-scdma system
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  • A fast power control method and base station for hsdpa in td-scdma system

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[0047] In order to make the object, technical solution and advantages of the present invention clearer, the present invention will be further described in detail below with reference to the accompanying drawings and examples.

[0048] The main idea of ​​the present invention is: when the RTBS ​​in the CQI reported by the UE is the maximum value for a continuous period of time (for example, N subframes, N can be configured), it indicates that the downlink channel quality is very good at this time, and the downlink transmit power is left. NodeB Reduce the transmission power of HS-PDSCH and keep RTBS ​​unchanged; when the frame RTBS ​​is not the maximum value, increase the transmission power of RTBS ​​and HS-PDSCH.

[0049] The HSDPA fast power control technical solution in the TD-SCDMA system provided by the present invention will be described in detail below through a preferred embodiment.

[0050]If the RTBS ​​among the N consecutively received CQIs is the maximum value, the R...

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Abstract

The invention provides an HSDPA (High Speed Downlink Packet Access) rapid power control method in a TD-SCDMA (Time Division-Synchronization Code Division Multiple Access) system and a base station. When the RTBS corresponding to a CQI (Channel Quality Indicator) reported by UE (User Equipment) is a maximum continuously in a period of time, the transmitting power of an HS-PDSCH (High Speed Physical Downlink Shared Channel) is reduced by a Node B, so that the interference with an adjacent region can be reduced, and while the RTBS is not the maximum, the RTBS and the downlink transmitting power are increased by the Node B, so that the RTBS can be rapidly increased after being reduced, and the downlink rate decrease due to reduction of the transmitting power is avoided.

Description

technical field [0001] The invention relates to mobile communication technology, in particular to an HSDPA fast power control method and a base station in a TD-SCDMA system. Background technique [0002] According to the existing technology, the power control of the HS-PDSCH is controlled by the NodeB, and the UE does not feed back the TPC command value to the NodeB, but feeds back the channel of the downlink HS-PDSCH through the Channel Quality Indicator (CQI, ChannelQualityIndicator) in the HS-SICH channel quality. CQI includes: RMF (recommended modulation method) and RTBS ​​(recommended transport block size), where the larger the RTBS, the better the channel quality, the RTBS ​​length is 6 bits, and the value range is 0 to 63. Each value corresponds to The transport block size can be found in the TBS table of the TS25.321 protocol. For example, for UEs with capability levels 13-15, the transport block size specified in the protocol is shown in Table 1: [0003] [0...

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H04W52/14H04W88/08
Inventor 王东锋谢勇李国栋
Owner TD TECH COMM TECH LTD
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