Efficient resource management in OFDMA Femto cells

ABSTRACT

Femto cells are a cost-effective means of providing ubiquitous connectivity in future broadband wireless networks. While their primary purpose has been to improve coverage in current solutions, their decreased cell sizes in turn also provide improved cell capacity through increased spatial reuse. The demand for bandwidth-intensive IP services will soon necessitate the need to tap into this improved capacity. However, the lack of direct coordination between the macro and femto cells, and the completely distributed nature of femto cells make this an extremely challenging task. In this work, we address this challenge by providing efficient resource management solutions for OFDMA-based femto cells along with performance guarantees. In the process, we consider two models that tradeoff performance and overhead. We also propose a novel location-based resource management solution for leveraging maximal spatial reuse from femto cells. Our comprehensive evaluations indicate that in addition to providing improved coverage indoors, with carefully designed resource management solutions that leverage spatial reuse, femto cells have a great potential to increase the system performance by two folds.

REFERENCES

• 1: 3GPP, "Technical specification group radio access networks; 3G home NodeB study item technical report (release 8)," TR 25.820 V1.0.0 (2007-11), Nov 2007.
• 2: WiMAX Forum, "Liaison statement to IEEE 802.16 to share WiMAX forum's high level air interface requirements to support femtocells," WirelesMAN: IEEE 802.16m, Sep 2008.
• 3: V. Chandrasekhar and J. Andrews, "Uplink capacity and interference avoidance for two-tier femtocell networks," To Appear in IEEE Trans. on Wireless Communications.
• 4: L.Ho and H. Claussen, "Effects of user-deployed, co-channel femtocells on the call drop probability in a residential scenario," in IEEE PIMRC, Sep 2007.
• 5: H. Claussen, "Performance of macro- and co-channel femtocells in a hierarchical cell structure," in IEEE PIMRC, Sep 2007.
• 6: Eun-Sun Jung , Nitin H. Vaidya, A power control MAC protocol for ad hoc networks, Proceedings of the 8th annual international conference on Mobile computing and networking, September 23-28, 2002, Atlanta, Georgia, USA [doi>10.1145/570645.570651]
• 7: Alaa Muqattash , Marwan Krunz, CDMA-based MAC protocol for wireless ad hoc networks, Proceedings of the 4th ACM international symposium on Mobile ad hoc networking & computing, June 01-03, 2003, Annapolis, Maryland, USA [doi>10.1145/778415.778434]
• 8: S. Kumar, V.S. Raghavan, and J. Deng, "Medium Access Control protocols for ad hoc wireless networks: A survey," Elsevier Ad Hoc Networks, vol. 4, no. 3, pp. 326--358, May 2006.
• 9: D. Malone, P. Clifford, D. Reid, and D.J. Leith, "Experimental implementation of optimal wlan channel selection without communication," in IEEE DySPAN, Apr 2007.
• 10: H. Luo and N. K. Shankaranarayanan, "A distributed dynamic channel allocation technique for throughput improvement in a dense wlan environment," in IEEE ICASSP, May 2004.
• 11: M. Hildebr, G. Cristache, K. David, and F. Fechter, "Location-based radio resource management in multi standard wireless network environments," in IST Mobile & Wireless Summit,, Jun 2002.
• 12: B. Radunovic and J. Le Boudec, "Rate performance objectives of multi-hop wireless networks," in IEEE INFOCOM, Mar 2004.
• 13: Jon Kleinberg , Eva Tardos, Algorithm Design, Addison-Wesley Longman Publishing Co., Inc., Boston, MA, 2005
• 14: R. Knopp and P.A. Humblet, "Information capacity and power control in single cell multiuser communications," in IEEE ICC, Jun 1995.

INDEX TERMS

Primary Classification:
  C. Computer Systems Organization
  C.2 COMPUTER-COMMUNICATION NETWORKS
      C.2.1 Network Architecture and Design
          Subjects: Wireless communication

General Terms:
Algorithms, Design, Performance

Keywords:
femto cells, location, ofdma, resource management, scheduling