Title :
Fair scheduling and resource allocation for wireless cellular network with shared relays
Author :
Lin, Yicheng ; Yu, Wei
Author_Institution :
Dept. of Electr. & Comput. Eng., Univ. of Toronto, Toronto, ON, Canada
Abstract :
This paper examines a shared relaying architecture for intercell interference mitigation in wireless cellular networks, where instead of deploying multiple separate relays within each cell sector, a single relay with multiple antennas is placed at the cell edge and is shared by multiple sectors. To maximize the benefit of shared relaying, resource allocation and the scheduling of users among the adjacent sectors need to be optimized jointly. This paper first provides a degree-of-freedom analysis as a motivation for the shared relay architecture, then formulates and solves a network utility maximization problem for a realistic shared relaying network, where zero-forcing beamforming is used at the relay to separate users spatially and multiple users are scheduled in the frequency domain to maximize frequency reuse. System-level simulations show that the incorporation of the shared relays can significantly improve the overall network utility, and increase the throughput of cell edge users in particular as compared to separate relaying.
Keywords :
cellular radio; frequency-domain analysis; interference suppression; resource allocation; scheduling; cell edge; degree-of-freedom analysis; fair scheduling; frequency domain; frequency reuse; intercell interference mitigation; network utility maximization problem; resource allocation; shared relay architecture; shared relaying architecture; wireless cellular networks; zero-forcing beamforming; Lead; Time frequency analysis;
Conference_Titel :
Information Sciences and Systems (CISS), 2012 46th Annual Conference on
Conference_Location :
Princeton, NJ
Print_ISBN :
978-1-4673-3139-5
Electronic_ISBN :
978-1-4673-3138-8
DOI :
10.1109/CISS.2012.6310738