© 2002 IEEE. Personal use of this material is permitted. However, permission to reprint/republish this material for advertising or promotional purposes or for creating new collective works for resale or redistribution to servers or lists, or to reuse any copyrighted component of this work in other works must be obtained from the IEEE.

IEEE Transactions on Wireless Communications
Volume 1 Number 1, January 2002

Table of Contents for this issue

Complete paper in PDF format

Performance and Implementation of Dynamic Frequency Hopping in Limited-Bandwidth Cellular Systems

Zoran Kostić, Senior Member, IEEE and Nelson Sollenberger Fellow, IEEE

Page 28.

Abstract:

We evaluate the performance of recently proposed dynamic frequency hopping (DFH) when applied to cellular systems with a limited total bandwidth. We also illustrate a practical implementation for DFH deployment using network-assisted resource allocation (NARA). The performance evaluation is accomplished by system-level simulations of a system with 12 carriers and 1/1 frequency reuse,based on the EDGE-Compact specification. Voice-only circuit-switched operation is assumed. Fading channel, multicell interference, voice activity, and antenna sectorization are modeled. We present the performance of dynamic frequency hopping compared to random frequency hopping and fixed channel assignment by showing distributions of word error rates. Sensitivity to occupancy, Rayleigh fading assumptions, number of carriers, voice activity, and measurement errors are studied. We also compare the uplink and downlink performance. The results indicate that DFH can significantly improve the performance compared to random frequency hopping. For example, at a 2% frame error rate with 90% coverage,the capacity improvement of DFH is almost 100% when compared with fixed channel assignment, and about 50% when compared to random frequency hopping. The amount of improvement for the uplink direction is smaller than the improvement for the downlink direction, especially for higher occupancies.

References

  1. R. L. Pickholtz, et al. "Theory of spread spectrum communications-A tutorial", IEEE Trans. Commun., vol. COM-30, pp.  855-884, May  1982 .
  2. J. L. Dornstetter and D. Verhulst, "Cellular efficiency with slow frequency hopping: Analysis of the digital SFH900 mobile system", IEEE J. Select. Areas Commun., vol. 5, pp.  835-848, July  1987.
  3. P. Rasky, et al. "Slow frequency-hop TDMA/CDMA for macrocellular personal communications", IEEE Commun. Mag., vol. 1, no. 2, pp.  26-35, 1994.
  4. X. Wang and Z. Kostic, "Analysis of frequency-hopped cellular systems with dynamic FH pattern adaptation", in Communication Theory Mini-Conference, IEEE Globecom, Sydney, Australia, 1998.
  5. P. Schram, et al. "Radio interface performance of edge, a proposal for enhanced data rates in existing digital cellular systems", in Proc. VTC'98, May 1998, pp.  1064-68. 
  6. "Working document toward submission of RTT candidate to ITU-R, IMT-2000 process:The UWC-136 RTT candidate submission", Tech. Rep. TR45.3 and U.S. TG 8/1, 1998.
  7. Z. Kostic and I. Maric, "Dynamic frequency hopping in wireless cellular systems-simulations of full-replacement and reduced-overhead methods", in Proc. IEEE VTC'99, Houston, TX, May 1999.
  8. Z. Kostic, I. Maric and X. Wang, "Fundamentals of dynamic frequency hopping in cellular systems", IEEE J. Select Areas Commun.,
  9. Z. Kostic, et al. "Dynamic frequency hopping in cellular systems with network assisted resource allocation", in Proc. IEEE VTC 2000 Conference, Tokyo, Japan, May 2000.
  10. S. Chennakeshu, et al. "Capacity analysis of a TDMA-based slow-frequency-hopped cellular system", IEEE Trans. Veh. Technol., vol. 45, pp.  531-542, Aug.  1996.
  11. K. Ivanov, et al. "Spectral capacity of frequency hopping GSM," in GSM Evolution Toward 3rd Generation Systems, Z. Zvonar, Ed. New York: Kluwer, 1999.
  12. Z. Kostic and N. Sollenberger, "Channel measurement alternatives with packet data for the is-136+ system", in IEEE Vehicular Technology Conf., Houston, TX, May 1999.
  13. X. Qiu, J. Chuang, K. Chawla and N. Sollenberger, "A network-assisted dynamic packet assignment algorithm for wireless data networks", in Proc. IEEE VTC'00, May 2000.
  14. J. Whitehead, "Global packet dynamic resource allocation (GPDRA) for wireless networks", AT&T Bell Laboratories, Tech. Memo., Mar. 1996.
  15. Z. Kostic, X. Qiu, J. Chuang, L. F. Chang, K. Chawla and N. Sollenberger, "Dynamic frequency hopping in cellular systems with network assisted resource allocation", in Proc. IEEE VTC'00 , May 2000.