Eun Yong Ha

The KIPS Transactions:PartC, Vol. 8, No. 1, pp. 88-96, Feb. 2001
10.3745/KIPSTC.2001.8.1.88,   PDF Download:

Abstract

Future mobile communication networks, which consist of ATM-based B-ISDN backbone networks and wireless ATM networks, will provide user with broadband connection and QoS service. These network systems need the lossless handoff methods which support user mobility, satisfy ATM features such as ATM cell ordering and so ATM cell duplication and minimize buffer requirement for ATM cell buffering. In this paper we suggest a multicast-based handoff method to support lossless connection as well as to minimize buffer overhead. It establisher a dynamic multicast connection between source terminal and wireless member AP(access point)s. When the mobile terminal receives data packet correctly, it notifies the positive acknowledgement of the packet to all member APs. And member Aps then release the MT related temporary buffer space for MT’s future movement. Therefore member Aps can eliminate unnecessary buffer usage and manage the buffer space efficiently. Analysis result shows that our handoff method has better performance in buffer requirement for lossless and seamless connection services over VCT(virtual connection tree) method and other dynamic multicast-based handoff methods.

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