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(65) Prior Publication Data
US 2009/0225776 Al Sep. 10, 2009
Related U.S. Application Data
(60) Division of application No. 10/848,470, filed on May 17, 2004, now Pat. No. 7,548,534, which is a continuation of application No. 09/613,434, filed on Jul. 11, 2000, now Pat. No. 6,785,252, whichis a continuationin-part of application No. 09/316,518, filed on May 21, 1999, now Pat. No. 6,925,068.
(51) Int. CI.
H04W 72/00 (2009.01)
(52) U.S. CI 370/230; 370/236; 370/346;
(58) Field of Classification Search None
See application file for complete search history.
U.S. PATENT DOCUMENTS
5,297,144 A 5,404,374 A 5,444,696 A 5,444,698 A 5,479,447 A
3/1994 Gilbert et al.
FOREIGN PATENT DOCUMENTS
0507384 A2 10/1992
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(Continued) Primary Examiner—Gregory B Sefcheck
A self-correcting bandwidth request/grant protocol in a broadband wireless communication system. The protocol uses a combination of incremental and aggregate bandwidth requests. Stations primarily transmit incremental bandwidth requests to their associated base stations, followed by periodic transmissions of aggregate bandwidth requests. Risks are reduced that a base station erroneously issues duplicate bandwidth allocations to the same station for the same connection. Race conditions that may have occurred using only aggregate bandwidth requests are eliminated. Use of periodic aggregate bandwidth requests that express the current state of respective connection queues provides a "self-correcting" property.
7 Claims, 15 Drawing Sheets
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* cited by examiner