Multiplex communications – Data flow congestion prevention or control
Patent
1997-02-27
1999-06-15
Pham, Chi H.
Multiplex communications
Data flow congestion prevention or control
370232, 455427, G06F 1100, H04Q 720
Patent
active
059128780
ABSTRACT:
A method and apparatus of improving user response time during cellular hand-offs and radio frequency changes in a Transmission Control Protocol/Internet Protocol (TCP/IP) mobile environment. In the mobile environment there is at least a mobile end station (20), a mobile data base station (22), a mobile data intermediate system (MDIS) (30) and a fixed end station (40). The MDIS (30) keeps track of the mobile end station (20) as it roams through the mobile environment. As a result, the MDIS (30) can distinguish between delays due to network congestion and delays due to cellular hand-offs. Further, the mobile data base station (22) informs the MDIS (30) of any changes in the radio frequency signal, thus allowing the MDIS (30) to also recognize delays due to changes in the radio frequency signal. With the knowledge of being able to identify the cause of the delays, the MDIS (30) is able to initiate or suppress a congestion control and recovery process.
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Caceres, R. and L. Iftode, "Improving the performance of reliable transport protocols in mobile computing environments", IEEE J. on Sel. area in Comm., vol. 13, No. 5, pp. 850-857, Jun. 1995.
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Andjelic Dragan
Maini Viji
Park Sung-Woo
Haas Kenneth A.
Motorola Inc.
Pham Chi H.
Qureshi Afsar M.
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