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Equipment and method for controlling retransmission data ROT

A technology of retransmitting data and retransmission, which is applied in the direction of error prevention/detection through transmission repetition, which can solve the problems of reducing scheduling accuracy and system performance

Inactive Publication Date: 2005-08-31
BEIJING SAMSUNG TELECOM R&D CENT +1
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AI Technical Summary

Problems solved by technology

In addition, Node B does not schedule retransmissions, which reduces the accuracy of scheduling
In addition, if the superimposed energy of several retransmissions received by Node B and the first transmission is greater than the energy required for correct decoding, it will bring more unnecessary uplink interference to the system, thereby reducing system performance

Method used

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  • Equipment and method for controlling retransmission data ROT
  • Equipment and method for controlling retransmission data ROT
  • Equipment and method for controlling retransmission data ROT

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Embodiment Construction

[0063] The present invention proposes a device and method for the Node B to flexibly control the retransmission data and the first transmission data ROT of the UE in the EUDCH. Compared with the existing rate scheduling mode and rate and time scheduling mode, the control of retransmission data ROT is added.

[0064] The present invention provides a device and method for flexibly controlling ROT during retransmission in a rate scheduling mode.

[0065] Figure 13 A flowchart of the method is given:

[0066] Such as Figure 13 The flow chart of sending and receiving of a HARQ process of the UE is shown. The Node B determines the change of the target ROT for the first transmission of new E-DCH data according to the current ROT, and uses the scheduling command RateGrant (RG) 1301 to indicate to the UE. The UE adjusts the UE pointer according to the RG command, that is, the TFCS subset that the UE is allowed to use, and selects the actually used TFC from the TFCS subset that th...

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Abstract

A method for controlling retransmission data ROT in the mode of speed regulation.This method includes the following steps:Node B decodes after receiving the data from UE,if coding is wrong,Node B sends NACK to UE and asks UE to retransmit the data.when retransmitting the data,Node B determines the change of aim ROT which is needed to retransmit data.Node B indicates the largest speed lifting that UE can use when retransmit by dispatching command RG.UE reckons the virtual transmission format combination according to the dispatching command RG from Node B so as to deduces the transmission power of the E-DPDCH channel when retransmitting.UE sends retransmission data with the same virtual transmission format combination used in the first time and the transmission power.Node B determines the anticipant ROT in retransmission process according to the ROT of the current base station and the power of E-DPDCH coding correctly and indicates by dispitching command of physical layer.The dispatching command does not indicate the actual transmission speed but the virtual transmission speed which is the one that Node B expects the UE reach when retransmission.

Description

technical field [0001] The present invention relates to the third generation of mobile communication, in particular to a device and a method for Node B to flexibly control ROT (Noise rise over thermal noise) of data that needs to be retransmitted in EUDCH. Background technique [0002] The second generation mobile communication system includes GSM (Global System for Mobile Communications) and IS (Interim Standard)-95, the main goal is to provide voice services. GSM adopts TDMA (Time Division Multiple Access) technology, which was commercialized in 1992 and is mainly used in Europe and China. What IS-95 uses is code division multiple access technology, mainly used in the United States and South Korea. [0003] At present, mobile communication technology has evolved into the third generation mobile communication system, which provides high-speed and high-quality data services and multimedia services in addition to voice services. The third generation mobile communication sys...

Claims

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Application Information

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IPC IPC(8): H04L1/08
Inventor 王婷李小强李周镐
Owner BEIJING SAMSUNG TELECOM R&D CENT
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