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Dow data repeating method in radio communication system

A technology for wireless communication systems and downlink data, applied in transmission systems, digital transmission systems, error prevention/detection using return channels, etc., can solve the problems of RNC buffer resource shortage, large RLC layer buffer size, and affecting processing capabilities, etc. Achieve the effects of improving effective utilization, improving user experience, and improving transmission reliability

Inactive Publication Date: 2008-11-26
HUAWEI TECH CO LTD
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Problems solved by technology

[0013] In practical application, the above scheme has the following problems: the time of retransmission is extended, and the RLC layer buffer of RNC is large
Since RLC is in RNC, the retransmission of RLC involves RNC processing, base station processing and data transmission between the two. Excessive intermediate link processing also leads to extended transmission time.
[0015] In addition, if the RLC layer of UTRAN does not receive the status report that the data fed back by the peer RLC layer of the UE has been received correctly, it needs to keep these data at the RLC layer. For carrying high-speed data traffic, it is easy to cause RNC failure. Cache resources are tight and affect its processing power

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  • Dow data repeating method in radio communication system
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  • Dow data repeating method in radio communication system

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Embodiment Construction

[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 in conjunction with the accompanying drawings.

[0048] The core of the present invention is to move the retransmission of the RLC layer down to the inside of the base station, so that the data retransmission time is close to the data transmission delay of the air interface, thereby greatly saving the retransmission time and meeting the requirement of carrying real-time services. At the same time, the downward retransmission of the RLC layer greatly reduces the data packets buffered at the RNC side, alleviates the problem of resource shortage in the RNC buffer, and improves the processing capability of the RNC. Specifically, a MAC cache for storing MAC-d PDUs is set up in the base station, and retransmitted data in the RLC layer is stored in the MAC cache in the base station. The data in the MAC cache is then tr...

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Abstract

This invention discloses a re-transmission method for down data in a radio communication system, which moves the re-transmission function of the RLC layer originally realized in the RNC to the MAC layer in a base station to be realized by the re-transmission instruction fed back by the MAC-e PDU carried user device of the HSUPA, in which, the base station buffer-stores the down data packet from the RLC layer in the MAC layer then transmits it to UE, the MAC-e sub-layer of which multiplexes the re-transmission instruction in the MAC-e PDU and sends it to the base station, the MAC-e PDU of which solves the instruction and refreshes the MAC layer buffer-storage and re-transmits error data packets.

Description

technical field [0001] The invention relates to the third-generation mobile communication technology, in particular to a method for retransmitting downlink data of the third-generation mobile communication system. Background technique [0002] Wideband Code Division Multiple Access (WCDMA for short) is one of the international standards for third-generation mobile communications in the world accepted by the International Telecommunications Union (ITU for short). It can also be said to be the first third-generation mobile communication system put into commercial use in the world, and it is also the frequency division duplex (Frequency Division Duplex, FDD for short) frequency band standard of the third-generation mobile communication system in Europe. [0003] WCDMA is a CDMA system using Direct Sequence Spread Spectrum (DSSS) technology, which expands user bandwidth to more than 1000 times and channel bandwidth to 5MHz through spreading codes. According to the theory of inf...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H04L1/18H04L1/08
CPCH04L1/1874
Inventor 秦亚莉李荣强
Owner HUAWEI TECH CO LTD