Data retransmission method based on high-speed down link data packet access technique

A data retransmission, high-speed technology, used in error prevention/detection using return channels, code division multiplexing systems, electrical components, etc., can solve problems such as data loss, increase success rate, and reduce signaling interaction and data transmission times, the effect of reducing loss

Inactive Publication Date: 2007-12-05
HUAWEI TECH CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

In UM mode, since there is only one round of NodeB direct physical layer retransmission of data, the disadvantage is that a large amount of data will be lost

Method used

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  • Data retransmission method based on high-speed down link data packet access technique
  • Data retransmission method based on high-speed down link data packet access technique
  • Data retransmission method based on high-speed down link data packet access technique

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specific Embodiment 1

[0044] The first specific embodiment is an implementation method of the present invention in AM mode. As shown in Figure 5, the specific implementation steps are as follows:

[0045] Step 501, adding two signalings in advance in the Iub interface between NodeB and RNC, which are data NACK signaling and NACK data retransmission indication signaling respectively.

[0046] The function of the data NACK signaling is to inform the RNC side that the RLC layer is in the AM transmission mode, and there is data that is not received correctly at the UE side. The basic message entities in this signaling content include:

[0047] Message type identification, the role of the message entity is to help the RNC side RLC layer identify the signaling;

[0048] User bearer information, which indicates that the data to be retransmitted is the data of which user's service in the RLC layer on the RNC side, helping the RLC layer to distinguish between users and user services;

[0049] The retrans...

specific Embodiment 2

[0061] The second specific embodiment is an implementation method of the present invention in the UM transmission mode. As shown in Figure 6, the specific implementation steps are as follows:

[0062] Step 601, adding two signalings in the Iub interface between the NodeB and the RNC in advance, which are respectively the data NACK signaling and the NACK data retransmission indication signaling.

[0063] The function of the data NACK signaling is to inform the RNC side that the RLC layer has data that is not received correctly at the UE side in the UM transmission mode. The basic message entities in this signaling content include:

[0064] Message type identification, the role of the message entity is to help the RNC side RLC layer identify the signaling;

[0065] User bearer information, which indicates that the data to be retransmitted is the data of which user's service in the RLC layer on the RNC side, helping the RLC layer to distinguish between users and user services; ...

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Abstract

This invention discloses a data re-transmitting method based on a high-speed down-stream data packet including the following step: adding data NACK signaling and NACK data re-transmitting instruction signaling in 1ub interface in advance. After the re-transmission of the direct physical layer fails, the MAC-hs entity of Node B side does not eliminate data of the buffer storage zone and sends data NACK signaling to RLC of RNC, after receiving the NACK signaling, RLC judges if the re-transmission is carried to generate a NACK re-transmission instruction signaling and send an instruction signaling of NACK data to MAC-hs of Node B, which receives it and judges if it re-transmits the signaling, if so, it reads out data of the buffer zone to re-transmit it on the physical layer, if not, it eliminates data of Node B buffer storage zone.

Description

technical field [0001] The invention relates to a broadband code division multiple access communication system, in particular to a data retransmission method based on high-speed downlink data packet access technology. Background technique [0002] The current Wideband Code Division Multiple Access (WCDMA) communication system can provide a maximum data transmission rate of 2 Mbps, support high-speed packet switching and circuit switching, and can provide many Internet-based services. However, for services such as downlink download or streaming media, the system needs to provide higher transmission rate and less delay. In order to meet the asymmetrical requirements of the uplink and downlink data services, a High Speed ​​Downlink Packet Access (HSDPA) technology is introduced to enable transmission at a rate of 10 Mbps or even higher on the downlink. [0003] HSDPA technology is an important technology for improving downlink capacity and data service rate in the later stage ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H04L1/18H04J13/00
Inventor 孙强
Owner HUAWEI TECH CO LTD
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