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Method for obtaining gain factor of special physical data channel for upload enhance

A data channel and gain factor technology, which is applied in the communication between multiple stations, transmission control/equalization, etc., can solve the problems of system capacity reduction, increase of rising transmit power, inaccurate gain factor, etc., and achieve reduction Effects of raising and lowering transmit power and improving system capacity

Active Publication Date: 2006-11-01
XFUSION DIGITAL TECH CO LTD
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Problems solved by technology

[0019] The present invention provides a method for obtaining a gain factor of an uplink enhanced dedicated physical data channel (E-DPDCH), which is used to solve the problem in the prior art that the power offset value corrected by the gain factor does not consider the transmission format after data stream multiplexing and The maximum number of retransmissions allowed makes the calculated gain factor inaccurate, which increases the rising transmit power and reduces the system capacity

Method used

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  • Method for obtaining gain factor of special physical data channel for upload enhance
  • Method for obtaining gain factor of special physical data channel for upload enhance
  • Method for obtaining gain factor of special physical data channel for upload enhance

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Embodiment Construction

[0047] see figure 1 , is a flow chart of the method of the present invention, comprising the following steps:

[0048] Step S11 , acquiring power offset values ​​and actual transmission rates corresponding to different retransmission times of data streams under different transmission formats through link simulation. Specifically include:

[0049] Establish the HSUPA simulation link model to simulate the HSUPA user uplink signal transmission, and the signal reaches the NodeB receiving antenna through the space propagation channel, such as figure 2 As shown, the antenna port signal S Tx S RX , experience space propagation path loss, large-scale fading (shadow fading), small-scale fading (fast fading). The link simulation only considers fast fading. The propagation characteristic model of fast fading is described in 3GPP protocol 25.943. The fast fading propagation characteristic channel including N multipaths is h ( τ ...

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Abstract

The method comprises: the power bias values and actual transmission speeds corresponding to bit-streams in different formats are obtained using communication link simulation; when use end (UE) initiates a service request to serving radio network controller (SRNC), in term of the type of service request, determines the combined mode, transmission speed and maximum data retransmission times of the request in order to get the transmission format and corresponding power bias value available for UE and matching the result of link simulation; SRNC configures said available transmission format and a reference format for UE; in term of said available transmission format, UE determines a present transmission format, and calculates a gain factor of the present transmission format comparing with the reference transmission format, and uses the power bias value corresponding to the present transmission format to modify said gain factor.

Description

technical field [0001] The present invention relates to WCDMA system uplink data transmission enhancement technology HSUPA (High SpeedUplink Packet Data Access, high-speed uplink packet data access), especially its uplink enhanced dedicated physical data channel (Enhanced-Dedicated Physical Data Channel, E-DPDCH) gain factor Get method. Background technique [0002] The 3GPP organization developed the WCDMA system uplink data transmission enhancement technology HSUPA. This uplink high-speed data access technology adopts the Hybrid Automatic Repeat Request (HARQ), the base station (NodeB) fast scheduling technology and the uplink 2ms short frame technology. The throughput rate of uplink user data is greatly improved, the peak rate of the air interface is as high as 5.76Mbps, and the uplink capacity of the system is also greatly improved. [0003] HSUPA technology adds two enhanced dedicated channels in the uplink, one is the enhanced dedicated control channel E-DPCCH, and th...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H04B7/005H04B7/26
Inventor 李荣强
Owner XFUSION DIGITAL TECH CO LTD
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