Carrier Load Balancing and Packet Scheduling for Multi-Carrier Systems

Yuanye Wang, Klaus Pedersen, Troels Bundgaard Sørensen, Preben Mogensen

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166 Citations (Scopus)
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Abstract

Abstract-In this paper we focus on resource allocation for next generation wireless communication systems with aggregation of multiple Component Carriers (CCs), i.e., how to assign the CCs to each user, and how to multiplex multiple users in each CC. We first investigate two carrier load balancing methods for allocating the CCs to the users- Round Robin (RR) and Mobile Hashing (MH) balancing by means of a simple theoretical formulation, as well as system level simulations. At Layer-2 we propose a simple cross-CC packet scheduling algorithm that improves the coverage performance and the resource allocation fairness among users, as compared to independent scheduling per CC. The Long Term Evolution (LTE)-Advanced is selected for the case study of a multi-carrier system. In such a system, RR provides better performance than MH balancing, and the proposed simple scheduling algorithm is shown to be effective in providing up to 90% coverage gain with no loss of the overall cell throughput, as compared to independent scheduling per CC.
Original languageEnglish
JournalIEEE Wireless Communications
Volume9
Issue number5
Pages (from-to)1780-1789
ISSN1536-1284
DOIs
Publication statusPublished - May 2010

Keywords

  • carrier aggregation
  • packet scheduling
  • load balancing
  • backwards compatible
  • LTE-Advanced

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