Optimal Positions of Relay Stations for Cluster-Based Two-Hop Cellular Network
- 1 Performance Engineering Laboratory (PEL), School of Electronic Engineering, Dublin City University, Ireland
- 2 Next Generation Wireless Systems, Dhirubhai Ambani Institute of Information and Communication Technology (DAIICT), Gandhinagar, India
- 3 Next Generation Wireless Systems, Dhirubhai Ambani Institute of Information and Communication Technology (DAIICT), Gandhinagar, India
Abstract
Multihop cellular networks is an exciting and a fledgling area of wireless communication which offers huge potential in terms of coverage enhancement, data-rates, power reduction, and various other quality of service improvements. However, resource allocation in MCN is an NP-hard problem. Hence, significant research needs to be done in this field in order to efficiently design the radio network. In this paper, optimal position of relay stations in a hierarchical cluster-based two-hop cellular network is investigated. Vector algebra has been used to derive general equation for carrier-to-interference ratio (C/I) of a mobile station. It has been observed that when the transmit power of base station (BS) and the gateway (GTW)/relay station (RS) are same, the RSs should be located close to mid-point of BS and the edge of the cell. However, significantly, when the transmit power of the BS is greater than that of the GTW, then the RSs should be placed closer to the edge of the cell, in order to maximize the minimum C/I at any point in the cell. This in turn results in higher modulation technique at the physical layer, and hence, a higher data-rate to all the users in the system.
- R. Ananthapadmanabha, B. Manoj, and C. Murthy, “Multihop cellular networks: The architecture and routing protocol,” in Proceedings of IEEE International Symposium on Personal Indoor Mobile Radio Communications (PIMRC’01), San Diego, USA, Vol. 2, pp. 78-82, Sep-tember 30- October 3, 2001.
- A. Agarwal and P. Kumar, “Capacity bounds for ad hoc and hybrid wireless networks,” ACM Special Interest Group on Data Communications (SIGCOMM), Vol. 34, No. 3, pp. 71-81, July 2004.
- O. Dousse, P. Thiran, and M. Hasler, “Connectivity in ad hoc and hybrid networks,” in Proceedings of IEEE International Conference on Computer Communications (INFOCOM), Vol. 2, pp. 1079-1088, June 23-27, 2002.
- H. Vishwanathan and S. Mukherjee, “Performance of cellular networks with relays and centralized scheduling,” in Proceedings of IEEE Vehicular Technology Conference (VTC Fall’03), Orlando, Florida, USA, Vol. 3, pp. 1923-1928, October 6-9, 2003.
- H. Wu, C. Qao, S. De, and O. Tonguz, “Integrated cellular and ad hoc relaying systems,” IEEE Journal on Selected Areas in Communication, Vol. 19, No. 10, pp. 2105-2115, October 2001.
- A. Zahran and B. Liang, “A generic framework for mobility modeling and performance analysis in next generation het-erogeneous wireless networks,” IEEE Communication Magazine, Vol. 45, No. 9, pp. 92-100, September 2007.
- K. G. J. He, K. Yang, and H. Chen, “Application of IEEE 802.16 mesh networks as the backhaul of multihop cellular networks,” IEEE Communication Magazine, Vol. 45, No. 9, pp. 82-91, September 2007.
- H. Haas and S. McLaughlin, “Next generation mobile access technologies: Implementing TDD,” Cambridge University Press, ISBN: 13: 9780521826228, pp. 420, January 2008.
- T. Rouse, S. McLaughlin, and I. Band, “Congestion-based routing strategies in multihop TDD-CDMA networks,” IEEE Journal on Selected Areas in Communication, Vol. 23, No. 3, pp. 668-681, March 2005.
- L. Le and E. Hossain, “Multihop cellular networks: Potential gains, research challenges, and a resource alloca-tion framework,” IEEE Communications Magazine, Vol. 45, No. 9, pp. 66-73, September 2007.
- J. Cho and Z. Haas, “On the throughput enhancement of the downstream channel in cellular radio networks through multihop relaying,” IEEE Journal on Selected Areas in Communications, Vol. 2, No. 7, pp. 1206-1219, September 2004.
- Y. Liu, R. Hoshyar, X. Yang, and R. Tafazolli, “Integrated radio resource allocation for multihop cellular networks with fixed relay stations,” IEEE Journal on Selected Areas in Communications, Vol. 24, No. 11, pp. 2137-2146, November 2006.