Tuesday, October 06, 2009 8:33:16 AM
Chandra , et al. October 6, 2009
Method and apparatus or eliminating interference caused by hidden nodes
Abstract
A method and system for eliminating interference caused by hidden nodes is disclosed. An initiator control message is defined for an initiator, (typically a wireless station (STA)), in order to begin an aggregate frame exchange with at least one responder. The initiator control message includes information on the queue sizes at the initiator. A responder, (typically an access point (AP)), sets up the required protection for the transmission of data by the initiator based on information on the queue sizes indicated in a field of the initiator control message using a responder control message. Other STAs that receive the responder control message set parameters for a wireless medium access accordingly. In another embodiment, multiple receiver aggregate multi-poll (MMP) and power save aggregation descriptor (PSAD) control frames are configured for transmission by a non-AP STA to provide enhanced scheduling and mitigate hidden node problems.
Inventors: Chandra; Arty (Manhasset Hills, NY), Grandhi; Sudheer A. (Mamaroneck, NY), Zeira; Eldad M. (Huntington, NY), Levy; Joseph S. (Merrick, NY), Dehnie; Sintayehu (Harrison, NJ), Sammour; Mohammed (Ville St. Laurent, CA)
Assignee: InterDigital Technology Corporation (Wilmington, DE)
Appl. No.: 11/236,895
Filed: September 28, 2005
Related U.S. Patent Documents
Application Number Filing Date Patent Number Issue Date
60646794 Jan., 2005
Current U.S. Class: 370/338 ; 370/236
Current International Class: H04W 4/00 (20060101); H04L 12/26 (20060101)
Field of Search: 370/330,462,231,236,338,401 455/41.2
Gamco
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