(12) United States Patent ao) Patent No.: us 6,510,144 Bi
Dommety et al. (45) Date of Patent: Jan. 21,2003
(21) Appl. No.: 09/457,041
(22) Filed: Dec. 7, 1999
(51) Int. C I. II04J 3/16
(52) U.S. CI 370/328; 370/409; 370/410;
(58) Field of Search 370/328, 329,
370/331, 338, 349, 389, 400, 401; 709/238, 249; 714/748, 749
(56) References Cited
U.S. PATENT DOCUMENTS
5,570,367 A * 10/1996 Ayanoglu et al 370/94.1
5,572,528 A * 11/1996 Shuen 370/85
5,737,328 A * 4/1998 Norman et al 370/331
5,793,762 A * 8/1998 Penners et al 370/389
Balakrishnan, Hari, et al., "A Comparsion ol Mechanisms for Improving TCP Performance over Wireless Links", Dec. 1997, IEEE/ACM Transactions on Networking, vol. 5, No. 6, pp. 756-769.
Laurens, Roy, et al., Simulation and Performance Analysis ol Internet Protocols Over Acts, May 1999, Carnegie Mellon University, Information Networking Institute, pp. 105.
* cited by examiner
Primary Examiner—-Thanh Cong Le
Assistant Examiner—James Ewart
(74) Attorney, Agent, or Firm—Beyer, Weaver & Thomas, LLP; Mary R. Olynick, Esq.
In a router or packet processing node supporting Mobile IP, a method for causing packets to be retransmitted Irom a sender to a mobile node is disclosed. A plurality ol packets having associated update information are received. The packets are intended for the mobile node. The update information associated with at least one ol the received packets is stored. When the mobile node is disconnected from the sender and reconnects to the sender, without waiting for a timeout the sender is directed to retransmit a last portion ol packets to the mobile node based on the stored update information. Apparatus and computer readable medium embodiments are also disclosed.
35 Claims, 7 Drawing Sheets