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Cost-based resource management in hybrid cellular-broadcasting systems
KTH, School of Information and Communication Technology (ICT), Communication Systems, CoS.
2005 (English)In: VTC2005-SPRING: 2005 IEEE 61ST VEHICULAR TECHNOLOGY CONFERENCE, VOLS 1-5, PROCEEDINGS  , New York: IEEE , 2005, 3183-3187 p.Conference paper, Published paper (Refereed)
Abstract [en]

This article introduces a cost based framework for the resource management in hybrid cellular-broadcasting systems with adaptive data rate. The considered service is delivery of multimedia items to the cache memory of user terminals. The problem investigated here is the minimization of the delivery cost per item, given that we have at our disposal a cellular and a broadcasting system. The proposed solution is to search for optimum set of users that are assigned to the broadcasting radio access and the respective data rate for serving them. The simulations performed on a test bed show that it is possible to achieve even four to five times reduction in cost per item if we employ both infrastructures, compared to a simpler strategy that assumes the transmission to only one of them. This significant gain justify the need for centralized resource management of the cellular and broadcasting systems. We have identified also situations when this gain is not significant, hence centralized management is not needed. Both situations are possible in realistic environments.

Place, publisher, year, edition, pages
New York: IEEE , 2005. 3183-3187 p.
Series
IEEE VTS Vehicular Technology Conference Proceedings, ISSN 1090-3038
Keyword [en]
Bit error rate, Broadcasting, Buffer storage, Computer simulation, Multimedia systems, Resource allocation
National Category
Telecommunications
Identifiers
URN: urn:nbn:se:kth:diva-26038ISI: 000232179304095Scopus ID: 2-s2.0-26444476023ISBN: 0-7803-8887-9 (print)OAI: oai:DiVA.org:kth-26038DiVA: diva2:369275
Conference
61st IEEE Vehicular Technology Conference Stockholm, SWEDEN, MAY 30-JUN 01, 2005
Note
QC 20101110Available from: 2010-11-10 Created: 2010-11-10 Last updated: 2010-11-10Bibliographically approved
In thesis
1. Hybrid cellular-broadcasting infrastructure systems: radio resource management issues
Open this publication in new window or tab >>Hybrid cellular-broadcasting infrastructure systems: radio resource management issues
2006 (English)Licentiate thesis, comprehensive summary (Other scientific)
Abstract [en]

This thesis addresses the problem of low-cost multicast delivery of multimedia content in future mobile networks. The trend towards reuse of existing infrastructure for cellular and broadcasting for building new systems is challenged, with respect to the opportunities for low cost service provision and scalable deployment of networks.

The studies outline significant potential of hybrid cellular-broadcasting infrastructure to deliver lower-cost mobile multimedia, compared to conventional telecom or broadcasting systems. Even with simple interworking techniques the achievable cost savings can be significant, at least under some specific settings.

The work starts with a foresight study shaped around four scenarios of the future, and continues with the introduction of a high-level framework for radio resource management in Ambient Networks. Two approaches on the hybrid system architecture are considered. The first one assumes different degrees of interworking between conventional cellular and broadcasting systems, in single and multi-operator environments. Second, is a broadcast only system where cellular sites are used for synchronized, complementary transmitters for the broadcasting site. In the first approach, the key issue is the multi-radio resource management, which is strongly affected by the degree of integration between the two networks. Two case studies deal with the problem of delivering, for lowest cost, a data item to a certain number of recipient users. A flexible broadcasting air interface, which offers several transmission data rates that can be dynamically changed, is demonstrated to significantly increase cost efficiency under certain conditions. An interesting result is that real-time monitoring of the user reception conditions is not needed, at least when multicast group is large. This indicates a high degree of integration between cellular and broadcasting networks may not by generally justified by visible cost savings.

Scalability of the hybrid infrastructure deployment is the main topic in the second approach. For a DVB-H type of network, the numerical evaluations show that achievement of economies of scale while increasing network capacity and coverage, by employing higher modulation and coding rate or installing new transmission sites, is difficult. Therefore, a technique based on application-layer forward error correction with Raptor codingA is suggested for enabling a flexible trading between system capacity, perceived coverage and delay, in the case of mobile users.

Place, publisher, year, edition, pages
Stockholm: Kommunikationssystem, 2006. xi, 75 p.
Series
Trita-ICT-COS, ISSN 1653-6347 ; 0601
National Category
Telecommunications
Identifiers
urn:nbn:se:kth:diva-3922 (URN)
Presentation
2006-04-21, Sal C1, Electrum, Isafjordsgatan 22, Kista, 14:00
Note
QC 20101110Available from: 2006-04-20 Created: 2006-04-20 Last updated: 2010-11-10Bibliographically approved

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Citation style
  • apa
  • harvard1
  • ieee
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Output format
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