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Radio apparatus with hybrid automatic retransmission protocol

一种自动重发、无线设备的技术，应用在基于链路质量的传输修改、使用返回通道进行错误预防/检测、前向错误控制使用等方向，能够解决重发、建立选择冗余方法、终端不能完成解码等问题

Inactive Publication Date: 2006-04-05
NEC CORP
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0019] In addition, even in a state where the terminal does not receive the systematic bit correctly, repeated retransmission from the wireless base station having a redundant version as a non-prioritized systematic bit, correct decoding cannot be performed at the terminal, resulting in repeated retransmission
[0020] It is difficult to increase the data throughput because in HARQ-based automatic retransmission without allocating proper resources due to the establishment of selection redundancy method in transmission

Method used

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  • Radio apparatus with hybrid automatic retransmission protocol
  • Radio apparatus with hybrid automatic retransmission protocol
  • Radio apparatus with hybrid automatic retransmission protocol

Examples

Experimental program
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Embodiment Construction

[0031] image 3 is a block diagram showing a wireless base station in one embodiment. This wireless base station is used in a W-CDMA mobile communication system, and performs HARQ-based automatic repeat transmission in HSDPA.

[0032] refer to image 3 , the radio base station 11 has a HARQ processing unit 90 , an ACK / NACK receiver unit 12 , a CQI receiver unit 13 , and a scheduler 14 . The scheduler 14 has a redundant version control unit 15 .

[0033] with in figure 2 The same HARQ processing unit 90 shown in the conventional HARQ processing unit uses the parameters of the redundant version given by the scheduler 14 s , r (referred to herein as "RV parameters"), before and after virtual buffering, perform c The rate matches twice.

[0034] refer to figure 2 , the virtual IR buffer 93 is a virtual buffer that performs buffering with a predetermined buffer size. The bit separation unit 91 separates the input data c from the channel encoding process 83 into systemati...

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PUM

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Abstract

A radio apparatus is disclosed for improving the throughput of data transfer using a HARQ-based automatic retransmission. The radio apparatus performs an HARQ-based automatic retransmission. In this event, a redundancy version control unit identifies a redundancy version in the retransmission based on a redundancy version in the preceding transmission in which the need for retransmission arose. An HARQ processing unit performs rate matching on each of the systematic bits and parity bits of data to be retransmitted in accordance with the redundancy version identified by the redundancy version control unit.

Description

technical field [0001] The present invention relates to a wireless device performing HARQ-based automatic retransmission. Background technique [0002] The 3rd Generation Partnership Project (3GPP) defines specifications for High Speed ​​Downlink Packet Access (HSDPA) to enable high speed data transmission. [0003] A feature of HSDPA is the use of Hybrid ARQ (HARQ: Hybrid Automatic Repeat Request) for automatic retransmission. According to HARQ, a terminal performs error detection on data from a radio base station, and requests retransmission from the radio base station if an error is detected. Based on the response from the terminal, the radio base station determines whether retransmission is necessary, and if necessary, retransmits the data. [0004] figure 1 is a diagram showing the signal flow processed by a conventional general wireless base station at the transmitting end of the physical layer; [0005] refer to figure 1 , for data to be transmitted, the radio ba...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H04L1/18H04W28/04
CPCH04L1/1819H04L1/0067H04L1/1887H04L1/0003H04L1/0026H04L1/0071H04L1/1854H04L1/18
Inventor 石崎隆一郎
Owner NEC CORP
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