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Relay-aided multi-cell broadcasting with random network coding
KTH, School of Electrical Engineering (EES), Communication Theory.
KTH, School of Electrical Engineering (EES), Communication Theory. KTH, School of Electrical Engineering (EES), Centres, ACCESS Linnaeus Centre.ORCID iD: 0000-0002-5407-0835
KTH, School of Electrical Engineering (EES), Communication Theory. KTH, School of Electrical Engineering (EES), Centres, ACCESS Linnaeus Centre.ORCID iD: 0000-0001-7182-9543
2010 (English)In: 2010 International Symposium on Information Theory and Its Applications, 2010, 957-962 p.Conference paper (Refereed)
Abstract [en]

We investigate a relay-aided multi-cell broadcasting system using random network codes, where the focus is on devising efficient scheduling algorithms between relay and base stations. Two scheduling algorithms are proposed based on different feedback strategies; namely, a one-step scheduling algorithm with instantaneous feedback for each redundancy packet; and a multi-step scheduling algorithm with feedback only after multiple redundancy packets. For the latter case, dynamic programming is applied to determine optimal scheduling. Numerical results show that the transmission efficiency of the multi-step algorithm approaches that of the one-step algorithm, but requires significantly less feedback. They both significantly outperform corresponding ARQ and random scheduling approaches.

Place, publisher, year, edition, pages
2010. 957-962 p.
Keyword [en]
Broadcasting systems, Feedback strategies, Multi-step, Multicell, Numerical results, Optimal scheduling, Random network, Random network coding, Step algorithms, Transmission efficiency, Broadcasting, Dynamic programming, Encoding (symbols), Information theory, Quality assurance, Redundancy, Spectroscopy, Telecommunication networks, Scheduling algorithms
National Category
Communication Systems
URN: urn:nbn:se:kth:diva-41481DOI: 10.1109/ISITA.2010.5649536ScopusID: 2-s2.0-78651342020ISBN: 9781424460175OAI: diva2:443990
ICT - The Next Generation
QC 20110927Available from: 2011-09-27 Created: 2011-09-27 Last updated: 2011-10-30Bibliographically approved
In thesis
1. Wireless Broadcasting with Network Coding
Open this publication in new window or tab >>Wireless Broadcasting with Network Coding
2011 (English)Licentiate thesis, comprehensive summary (Other academic)
Abstract [en]

Wireless digital broadcasting applications such as digital audio broadcast (DAB) and digital video broadcast (DVB) are becoming increasingly popular since the digital format allows for quality improvements as compared to traditional analogue broadcast. The broadcasting is commonly based on packet transmission. In this thesis, we consider broadcasting over packet erasure channels. To achieve reliable transmission, error-control schemes are needed. By carefully designing the error-control schemes, transmission efficiency can be improved compared to traditiona lautomatic repeat-request (ARQ) schemes and rateless codes. Here, we first study the application of a novel binary deterministic rateless (BDR) code. Then, we focus on the design of network coding for the wireless broadcasting system, which can significantly improve the system performance compared to traditional ARQ. Both the one-hop broadcasting system and a relay-aided broadcasting system areconsidered.

In the one-hop broadcasting system, we investigate the application of systematic BDR (SBDR) codes and instantaneously decodable network coding (IDNC). For the SBDR codes, we determine the number of encoded redundancy packets that guarantees high broadcast transmission efficiencies and simultaneous lowcomplexity. Moreover, with limited feedback the efficiency performance can be further improved. Then, we propose an improved network coding scheme that can asymptotically achieve the theoretical lower bound on transmission overhead for a sufficiently large number of information packets.

In the relay-aided system, we consider a scenario where the relay node operates in half duplex mode, and transmissions from the BS and the relay, respectively, are over orthogonal channels. Based on random network coding, a scheduling problem for the transmissions of redundancy packets from the BS and the relay is formulated. Two scenarios; namely instantaneous feedback after each redundancy packet, and feedback after multiple redundancy packets are investigated. We further extend the algorithms to multi-cell networks. Besides random network coding, IDNC based schemes are proposed as well. We show that significant improvements in transmission efficiency are obtained as compared to previously proposed ARQ and network-coding-based schemes.

Place, publisher, year, edition, pages
Stockholm: KTH Royal Institute of Technology, 2011. ix, 29 p.
Trita-EE, ISSN 1653-5146 ; 2011:05
wireless broadcasting, relay-aided system, systematic binary deterministic rateless codes, random network coding, instantaneously decodable network coding
National Category
Engineering and Technology
urn:nbn:se:kth:diva-40472 (URN)978-91-7501-082-3 (ISBN)
2011-09-07, sal V3, KTH, Stockholm, 15:00 (English)
QC 20110907Available from: 2011-09-27 Created: 2011-09-15 Last updated: 2011-09-27Bibliographically approved

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Lu, LuXiao, MingKildehöj Rasmussen, Lars
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