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Control method, system and equipment for down data link of TDD HSDPA system

A technology of downlink data and transmission code, applied in the field of downlink data transmission control, can solve the problem of not being able to adapt to the transmission characteristics of real-time small packet services, and achieve the effect of reducing control overhead and improving transmission capacity

Inactive Publication Date: 2009-04-22
CHINA ACAD OF TELECOMM TECH
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Problems solved by technology

Based on the above analysis, the inventor believes that the downlink data transmission control method in the existing TDD HSDPA system cannot well adapt to the transmission characteristics of real-time small packet services, and it is necessary to provide a downlink data transmission control method that supports real-time small packet services. Reduce the control overhead of NodeB and increase the transmission capacity of downlink data

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  • Control method, system and equipment for down data link of TDD HSDPA system
  • Control method, system and equipment for down data link of TDD HSDPA system
  • Control method, system and equipment for down data link of TDD HSDPA system

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Embodiment Construction

[0030] The embodiment of the present invention provides a downlink data transmission control method in a TDD HSDPA system, which reduces the control overhead of the NodeB and improves the transmission capacity of the downlink data. The following measures are mainly taken:

[0031] In the downlink data transmission process, the downlink control information is transmitted on the HS-SCCH only when the data packet is retransmitted, and the downlink control information is not sent on the HS-SCCH when the data packet is initially transmitted;

[0032]After receiving the initial data packet, the UE will feed back ACK information on the feedback channel HS-SICH if the received data packet is decoded successfully, and will not feed back NACK information if the decoding fails;

[0033] According to the transmission characteristics of real-time small packet services, the redundant information in the downlink control information transmitted by the NodeB and the ACK / NACK information fed bac...

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Abstract

The invention discloses a downlink data transmission control method, a system and equipment in a time division duplex high-speed downlink packet access system, which reduce the control overhead of a base station and further improve the transmission capacity of the downlink data. The method which controls the transmission of the downlink data comprises the following steps: after initial transmission of a data packet is carried out to user equipment on a pre-appointed initial transmission code channel, confirmed feedback information after the user equipment correctly receives the data packet iswaited for being received on a initial transmission feedback channel corresponding to the pre-appointed initial transmission code channel; moreover, when the confirmed information is not received on the initial feedback channel, retransmission control information is sent to the user equipment on a control channel which is configured for the user equipment, and the data packet is retransmitted. The downlink data transmission control system comprises user equipment and a base station. The embodiment of the invention also discloses a base station and user equipment.

Description

technical field [0001] The invention relates to the technical field of mobile communication, in particular to the downlink data transmission control technology in the TDD HSDPA system. Background technique [0002] The 3rd Generation Partnership Project (3GPP) Release 5 (R5) version introduces the High Speed ​​Downlink Packet Access (HSDPA) technology, and the downlink data is sent through the logic responsible for wireless reception and transmission. The node NodeB realizes fast scheduling of different user equipments (User Equipment, UE). HSDPA technology can obtain higher user peak rate and cell Data throughput. [0003] In HSDPA technology, the logical channel of the transport layer, the High Speed ​​Downlink Shared Channel (HS-DSCH), is used to transmit downlink data sent to the UE; the HS-DSCH is mapped to the High Speed ​​Physical Downlink Shared Channel (High Speed ​​Downlink Shared Channel) at the physical layer Channel, HS-PDSCH), the spreading factor of the cha...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H04L1/18H04L1/16H04L12/56
Inventor 刘亚伟高卓李晓卡
Owner CHINA ACAD OF TELECOMM TECH
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