Arq control in an hsdpa communications system

An automatic retransmission request, downlink technology, applied in the direction of link quality-based transmission modification, transmission system, digital transmission system, etc., can solve the problem of data packet sequence disorder and so on

Inactive Publication Date: 2006-11-22
NEC CORP
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  • Summary
  • Abstract
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  • Claims
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AI Technical Summary

Problems solved by technology

In this case, data packets that are successfully received after the previous corrupt

Method used

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  • Arq control in an hsdpa communications system
  • Arq control in an hsdpa communications system
  • Arq control in an hsdpa communications system

Examples

Experimental program
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Embodiment Construction

[0038] now refer to figure 1 , which generally shows a 7-layer Open Systems Interconnection model designed to support most types of communication systems. Each layer does not specify exact protocols or services, but rather defines a functional model that needs to be implemented. Model 100 includes physical layer 102 , data link layer 104 , network layer 106 , transport layer 108 , session layer 110 , presentation layer 112 , and application layer 114 .

[0039] The physical layer 102 conditions digital data from higher layers so that it can be reliably transmitted over a mobile radio channel. In the transmit direction, the physical layer 102 performs functions such as channel coding, interleaving, scrambling, spreading and modulation. In the receive direction, these functions are reversed so that the transmitted data is recovered at the receiver.

[0040] The data link layer 104 is responsible for converting data from the physical layer into frames. The data link layer 104...

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Abstract

A method of Automatic Repeat reQuest (ARQ) control in a High Speed Downlink Packet Access (HSDPA) communication system. The method includes transmitting (300) control information from a first station to a second station; commencing receipt (312) of the control information at the second station; checking (502) whether the control information was received with error; and if so, generating (604) a negative acknowledgment (NACK) message for transmission to the first station. The control information error checking and acknowledgment message generating is performed at the second station by carrying out processing operations within radio interface layer 1 (UE layer 1).

Description

technical field [0001] The present invention relates generally to error control of data transmitted between stations in a communication system, and more particularly to Automatic Repeat reQuest in a High Speed ​​Downlink Packet Access (HSDPA) communication system. , ARQ) control. Background technique [0002] HSDPA is one of the key features of the third generation (3G) wireless communication standard for Wideband Code Division Multiple Access (W-CDMA). W-CDMA is proposed to support multimedia services in the downlink direction. As the name implies, HSDPA brings high-speed data delivery to 3G stations, ensuring that users requiring effective multimedia capabilities can benefit from data rates previously unavailable due to constraints in the radio access network. HSDPA is intended to provide very high data rates of up to 14.4 Mbps over a 5 MHz bandwidth in the downlink direction. It is also intended to guarantee high-quality applications such as video streaming, interactiv...

Claims

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Application Information

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IPC IPC(8): H04L1/16H04L1/00H04L1/12H04L1/18H04W28/04
CPCH04L1/0003H04L1/0009H04L1/0026H04L1/1692H04L1/1812H04L2001/125
Inventor 彭·恩古亚
Owner NEC CORP
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