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

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 reduced system capacity, increased transmit power, and inaccurate gain factors, etc., to achieve reduction Effects of raising and lowering transmit power and improving system capacity

Active Publication Date: 2009-09-23
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

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

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Embodiment Construction

[0046] see figure 1 , is a flow chart of the method of the present invention, comprising the following steps:

[0047] 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:

[0048] 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 invention discloses a method for obtaining the gain factor of an uplink enhanced dedicated physical data channel, which includes: obtaining the power offset value and the actual transmission rate corresponding to different retransmission times of data streams in different transmission formats through link simulation, when the user terminal When the UE initiates a service request to the serving radio network controller SRNC, according to the service request type, determine the combination mode, transmission rate and maximum retransmission times of the data flow of the service; match the link simulation results to obtain the transmission format available to the UE and the corresponding power offset value; the SRNC configures the available transport format and the reference transport format to the UE; the UE determines the current transport format according to the available transport format; the UE calculates the gain factor of the current transport format relative to the reference transport format, and uses the current The power offset value corresponding to the transmission format modifies the gain factor. The gain factor obtained by the invention is more accurate, and can achieve the purpose of reducing the uplink transmission power and improving the uplink system capacity.

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 Channel1, 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 t...

Claims

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Application Information

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