NDLI: Position Assisted Coordinate HARQ in LTE Systems for High Speed Railway

Content Provider	IEEE Xplore Digital Library
Author	Wantuan Luo Xuming Fang Shasha Li Yingying Xia
Copyright Year	2013
Description	Author affiliation: Provincial Key Lab. of Inf. Coding & Transm., Southwest Jiaotong Univ., Chengdu, China (Wantuan Luo; Xuming Fang; Shasha Li; Yingying Xia)
Abstract	Voice over IP (VoIP) in LTE-R (LTE for Railway) will replace the circuit-switched (CS) voice service of the GSMR (GSM for Railway). However, it will face new problems in high speed railway scenario. In overlapping areas, the handover signaling (i.e. handover measurement and decision) is of higher priority than Hybrid Automatic Repeat reQuest (HARQ) retransmission so that the HARQ retransmission will be canceled when conflicts happen. If an user equipment (UE) is handed over to the target eNodeB (eNB), the HARQ retransmission or ACK/NACK of source eNB will not be received by the UE as normal, and the UE will wait for the potential retransmission and ACK/NACK. These particular problems will increase the VoIP packet error rate (PER) significantly. In order to solve these problems, a position assisted coordinate HARQ scheme in LTE system for high speed railway is proposed. With the help of trains position, the source eNB and target eNB share packets through coordination. If the handover is triggered, the UE will stop sending ACK/NACK. When the handover is completed, the UE sends the ACK of the last continuous packet to ensure lossless handover. Simulation results show that our proposal can reduce the VoIP PER in high speed railway scenario, and improve the system reliability, as well as VoIP capacity.
Sponsorship	IEEE Vehicular Technol. Soc.
Starting Page	1
Ending Page	5
File Size	535979
Page Count	5
File Format	PDF
ISBN	9781467363372
ISSN	15502252
DOI	10.1109/VTCSpring.2013.6692716
Language	English
Publisher	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Publisher Date	2013-06-02
Publisher Place	Germany
Access Restriction	Subscribed
Rights Holder	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Subject Keyword	Handover Rail transportation Manganese Proposals Downlink Quality of service
Content Type	Text
Resource Type	Article
Subject	Applied Mathematics Electrical and Electronic Engineering Computer Science Applications

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1	Ministry of Education (GoI), Department of Higher Education	Sanctioning Authority	https://www.education.gov.in/ict-initiatives
2	Indian Institute of Technology Kharagpur	Host Institute of the Project: The host institute of the project is responsible for providing infrastructure support and hosting the project	https://www.iitkgp.ac.in
3	National Digital Library of India Office, Indian Institute of Technology Kharagpur	The administrative and infrastructural headquarters of the project	Dr. B. Sutradhar bsutra@ndl.gov.in
4	Project PI / Joint PI	Principal Investigator and Joint Principal Investigators of the project	Dr. B. Sutradhar bsutra@ndl.gov.in Prof. Saswat Chakrabarti will be added soon
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