Power control method based on mixed automatic retransmission mechanism

A hybrid automatic retransmission and power control technology, which is applied in the direction of transmission control/balance, power management, and communication between multiple stations, can solve the problems of high data packet quality and waste of resources, and reduce signal interference, The effect of reducing resource consumption

Inactive Publication Date: 2003-04-16
HUAWEI TECH CO LTD
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Problems solved by technology

However, in some instantaneous occasions, such as when the base station retransmits data packets, because the information of previous failed data packets can be fully utilized, the quality of the combined undecoded data packets may be much higher than the requirements for correct decoding, which is a problem for WCDMA systems. Said, means a waste of resources

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  • Power control method based on mixed automatic retransmission mechanism
  • Power control method based on mixed automatic retransmission mechanism
  • Power control method based on mixed automatic retransmission mechanism

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Embodiment Construction

[0020] The present invention will be described in further detail below in conjunction with the accompanying drawings.

[0021] In the high-speed data transmission of the WCDMA system, in order to improve the data transmission speed and increase the real-time response capability, the data service often adopts the HARQ technology and is transmitted in the form of packet data packets. The data packets in each transmission time interval (TTI) of the base station pass an additional cyclic redundancy check code (CRC, Cyclic Redundancy Code), and the user end checks the received decoded data within the TTI through the CRC when receiving , to judge whether the received data is correct, if correct, return confirmation information (ACK); if not correct, return non-confirmation information (NACK), the sender retransmits the data packet after receiving the NACK information, and the receiver Then perform CRC check, and feed back ACK and NACK information.

[0022] In the system, in order t...

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Abstract

This invention discloses a power control method based on mixed automatic retransmitting mechanism in which the user end checks received data packet and to feed back to the base station ACK message ifthe result is correct, and the base station sends the next data packet according to the emitting power of last data packet, if not, sends back NA CK message and quality information of received data packet, the base station will adjust the transmitting power of retransmitting data packet and retransmits the said data packet to guarantee the retransmitting efficiency of the data packet, reduce resource lost of the system to the ulmost and reduce signal interference among different users.

Description

technical field [0001] The invention relates to a power control method in a wireless communication system, in particular to a power control method under a hybrid automatic repeat request mechanism. Background technique [0002] In a WCDMA (Wideband Code Division Multiple Access) system, circuit-switched data and packet-switched data have different characteristics. Circuit-switched data has real-time characteristics and can tolerate a certain amount of packet error; packet-switched data can usually tolerate a certain delay, and the requirement for packet error is as low as possible. In order to ensure the correctness of packet exchange data, the HARQ (Hybrid Automatic Repeat Request) mechanism is usually used to check the received data at each TTI (Transmission Time Interval) by the user end to determine whether the received data is correct. If the received data is correct, an acknowledgment (ACK, Acknowledge) is returned to the base station; if it is not correct, an acknowl...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H04B7/005H04B7/26H04W52/04
Inventor 苏宁
Owner HUAWEI TECH CO LTD
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