Cross-layer optimization for wireless multihop multicast networks
- Authors
- Kim, Wooseong; Park, Joon-Sang; Ahn, Sanghyun
- Issue Date
- Oct-2013
- Publisher
- SPRINGER
- Keywords
- Wireless multihop networks; Multicast; Optimization; Cross-layer; Opportunistic scheduling
- Citation
- JOURNAL OF SUPERCOMPUTING, v.66, no.1, pp.21 - 34
- Journal Title
- JOURNAL OF SUPERCOMPUTING
- Volume
- 66
- Number
- 1
- Start Page
- 21
- End Page
- 34
- URI
- https://scholarworks.bwise.kr/hongik/handle/2020.sw.hongik/17034
- DOI
- 10.1007/s11227-013-0929-4
- ISSN
- 0920-8542
- Abstract
- Cyber-Physical System (CPS) is envisioned to tightly integrate the cyber-world of computation, communication, and control with the physical world. CPS is typically designed as a networked system of interacting sensors, actuators, and embedded computing devices to monitor and control the physical world. Thus, one of the essential building blocks of such a system is a highly efficient networking infrastructure. In this paper, we aims to develop an efficient wireless networking technology which can be utilized in CPS. More specifically, we develop a cross-layer optimization model based on the Network Utility Maximization (NUM) framework and its distributed solution for wireless multihop multicast networks exploiting multi-user diversity. It is known that the capacity of a wireless network can be increased by exploiting different channel conditions at different users, i.e., multi-user diversity; however, it is yet to be determined how much performance gain can be achieved by exploiting multi-user diversity in wireless multihop multicast networks. To address this problem, we extend the NUM framework and derive a new optimization problem including the benefits of multi-user diversity for multicasting scenarios in wireless multihop networks under a probabilistic media access control (MAC). In our problem, multi-user diversity is achieved via opportunistic scheduling. Then, we propose a distributed approximation algorithm for the problem. Our numerical results confirm that the benefit of multi-user diversity is prominent in a wireless multihop network with multicast flows.
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