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Method for control of error of wide-band radio communication link layer

A broadband wireless communication, wireless link layer technology, applied in the use of forward error control, transmission modification based on link quality, error prevention, etc., can solve problems such as reduced resource efficiency and frequent channel state changes

Inactive Publication Date: 2004-01-14
SAMSUNG ELECTRONICS CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0012] Since in the traditional hybrid ARQ scheme, a uniform coding rate is used regardless of the state of the channel, resource efficiency may be reduced in the case of using the conventional hybrid ARQ scheme in a wireless channel where the channel state changes relatively frequent

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  • Method for control of error of wide-band radio communication link layer
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  • Method for control of error of wide-band radio communication link layer

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Embodiment Construction

[0034] image 3 It schematically shows the overall structure of the broadband wireless communication network according to the embodiment of the present invention. image 3 The description is made using an example of an Asynchronous Transfer Mode (ATM) network, which represents a broadband communication network. However, the present invention is not limited thereto.

[0035] like image 3 As shown, terminal equipments 30 to 30n and mobile stations 32 to 32m are connected by wired channels. Fiber optic cables are generally used as the medium for wired channels. ATM cells 31 to 31n are transmission units in the link layer, and they have a fixed length of 53 bytes. The mobile stations 32 to 32m and the base station 34 are connected through wireless channels. The present invention relates to a method of controlling errors in the link layer with respect to ATM cells 33 to 33m or other radio cells transmitted in a radio channel section. Cells sent by terminal equipment 30 to 30...

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Abstract

A method for controlling errors in a wireless link layer using a simultaneous multiple copy scheme and an adaptive forward error correction (FEC) scheme in a wideband wireless communication is provided. The method uses an automatic repeat request (ARQ) scheme, in which a wideband wireless channel is used for communication between a first node and a second node, includes the steps of (a) estimating the error ratio of a forward channel using the state of a backward channel, and transmitting a cell, in which a forward error correction (FEC) code having an encoding ratio that varies depending on the estimated error ratio is included in a protocol data unit (PDU) of a wireless link layer, through the forward channel and (b) re-transmitting the copy of a cell transmitted in the step (a), when feedback information that indicates that an error exists in the cell transmitted in the step (a) is received through the backward channel.

Description

technical field [0001] The present invention relates to an error control method of link layer in broadband wireless communication, and in particular to using a simultaneous multiple copy scheme (simultaneous multiple copy scheme) and an adaptive forward error control scheme in the wireless link layer to realize real-time error control in broadband wireless communication. The method of the service. Background technique [0002] In broadband communication using optical fiber cables, the transmission error rate is very low due to the stability of the communication medium. However, in the case of wireless communication, due to the characteristics of the medium, the transmission error rate is higher than in wired communication, and the error rate distribution varies greatly. Therefore, error control schemes are very important for broadband wireless communications. [0003] The error control schemes in the traditional wireless link layer can be divided into: forward error correc...

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H04L1/08H04B14/04H04L1/00H04L1/18H04L29/08
CPCH04L1/007H04L1/1816H03M13/353H04L1/1809H04L1/0009H04L1/08H04L1/189H03M13/6337H04L1/0072H03M13/6306
Inventor 姜友植张景训姜忠求安昌旭
Owner SAMSUNG ELECTRONICS CO LTD