Acta Metallurgica Sinica(English letters) ›› 2007, Vol. 14 ›› Issue (4): 27-31.doi: 1005-8885 (2007) 04-0027-05

• Wireless • Previous Articles     Next Articles

Handover with resource pre-allocation in the OFDMA systems

LI Ming-ju; XU Ning; WANG Ying; ZHANG Ping   

  1. Key Laboratory of Universal Wireless Communications (Beijing University of Posts and Telecommunications) Ministry of Education, Wireless Technology Innovation Institute
  • Received:2007-04-04 Revised:1900-01-01 Online:2007-12-24
  • Contact: LI Ming-ju


This article proposed a new handover algorithm for beyond the third generation (B3G) systems with an orthogonal frequency division multiple access (OFDMA) downlink. In the proposed algorithm, handover mobile termination (MT) chooses a subchannel set in the candidate cells by a subchannel booking rule, based on the terminal speed and the subchannel’s channel state information (CSI). Moreover, the handover decision is made after analyzing if at least one candidate cell can reserve the subchannel set for the handover user. Simulation results show that the algorithm reduces the number of handovers and guarantees the quality of service (QoS) for the handover users. It yields better system performance in the OFDMA systems.

Key words:

handover; OFDMA; resource preallocation; sub- channel booking rule; CSI