Unlock instant, AI-driven research and patent intelligence for your innovation.

A dispatching method and device based on mixed automatic request retransfer

A hybrid automatic and scheduling method technology, applied in the transmission system, digital transmission system, data exchange network, etc., can solve the problems of inaccurate judgment of the user's actual transmission rate and difficulty in achieving the maximum throughput of the system, and achieve reliable and effective transmission quality , ensure accuracy and effectiveness, and increase throughput

Active Publication Date: 2013-05-29
DOCOMO BEIJING COMM LAB
View PDF0 Cites 0 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0020] The purpose of the present invention is to provide a scheduling method and device based on hybrid automatic request for retransmission, which solves the problem that the prior art fails to carefully consider the influence of the retransmission user's combining gain on the transmission rate, and cannot accurately determine the user's actual transmission rate. Technical Issues Achieving Maximum System Throughput

Method used

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
View more

Image

Smart Image Click on the blue labels to locate them in the text.
Viewing Examples
Smart Image
  • A dispatching method and device based on mixed automatic request retransfer
  • A dispatching method and device based on mixed automatic request retransfer
  • A dispatching method and device based on mixed automatic request retransfer

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0060] If the scheduling algorithm is based on the maximum carrier-to-interference ratio, the embodiment 1 of the scheduling algorithm of the present invention after introducing the combined gain is as follows:

[0061] 1) Users who need to communicate feed back their respective channel quality information SINR to the base station inst (k).

[0062] 2) The base station determines their maximum allowable transmission rate R according to the channel quality and retransmission information of each user MCS(k) . For users who send new data, directly based on the feedback SINR inst (k) Determine R MCS(k) ; For retransmitting users, its R MCS(k) The same rate at which it last sent data.

[0063] 3) Sort the maximum allowable transmission rates obtained above, and determine the user set with the maximum rate Ω = arg max k ∈ Π R ...

Embodiment 2

[0068] Embodiment 2 based on the maximum load-to-interference ratio is as follows:

[0069] 1) Users who need to communicate calculate their effective signal-to-noise ratios according to their instantaneous channel quality information, retransmission information and combining gain: SINR eff (i) = SINR inst (i)+G(i), and feed back the effective SNR to the base station.

[0070] 2) The base station determines their maximum allowable transmission rate R according to the channel quality and retransmission information of each user MCS(k) . For users who send new data, directly based on the feedback SINR eff (k) Determine R MCS(k) ; For retransmitting users, its R MCS(k) The same rate at which it last sent data.

[0071] 3) Sort the maximum allowable transmission rates obtained above, and determine the user set with the maximum rate Ω = arg max k ∈ Π ...

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

PUM

No PUM Login to View More

Abstract

The invention discloses a scheduling method and device based on the hybrid automatic repeat request (HARQ), wherein the method comprises: determining transmission rate obtained by user according the signal-to-noise ratio fed back by user and the condition whether the user launches repeat request during scheduling process; then obtaining effective signal-to-noise ratio of user by considering to add synthesized gain of repeat user in the signal-to-noise ratio fed back by the user; by scheduling according to the effective signal-to-noise ratio, the method can combine with scheduling methods suchas traditional maximal carrying / interference ratio (MAXC / I) depending on channel condition and proportional fairness (PF), etc.. By considering influence on the transmission rate caused by synthesized gain of the user, the invention introduces scheduling algorithm by theory gain synthesis, capable of judging the actual transmission rate of the user more accurately, in order to provide more reliable transmission quality for wireless high-speed data communication.

Description

technical field [0001] The present invention relates to wireless packet scheduling technology in the communication field, in particular to a scheduling method and device based on hybrid automatic request retransmission for ensuring effective and reliable data transmission in high-speed wireless data communication. Background technique [0002] With the application of multimedia services in wireless networks more and more widely, wireless packet scheduling will become an important research topic. The fairness and system throughput are one of the important indicators to measure the wireless packet scheduling strategy, which requires that each user must share wireless resources as fairly as possible while improving the system throughput. However, in a wireless network, since users are in different channel states, it is contradictory to improve system throughput and ensure fairness. In order to ensure fairness, some channels must be allocated to users with poor channel states, w...

Claims

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

Application Information

Patent Timeline
no application Login to View More
Patent Type & Authority Patents(China)
IPC IPC(8): H04L12/721H04L1/18H04L1/16H04W72/12
Inventor 刘芳佘小明陈岚
Owner DOCOMO BEIJING COMM LAB