Invention Grant
US08306050B2 Smart adjustment of backoff counter and contention window for improved random access
有权
智能调整退货计数器和争用窗口，改进随机访问
- Patent Title: Smart adjustment of backoff counter and contention window for improved random access
- Patent Title (中): 智能调整退货计数器和争用窗口，改进随机访问
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Application No.: US12697098Application Date: 2010-01-29
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Publication No.: US08306050B2Publication Date: 2012-11-06
- Inventor: Jin-Meng Ho
- Applicant: Jin-Meng Ho
- Applicant Address: US TX Dallas
- Assignee: Texas Instruments Incorporated
- Current Assignee: Texas Instruments Incorporated
- Current Assignee Address: US TX Dallas
- Agent Steven A. Shaw; W. James Brady; Frederick J. Telecky, Jr.
- Main IPC: H04L12/413
- IPC: H04L12/413
Abstract:
A backoff counter is used to determine the start time of a contended allocation for a device. The backoff counter is set to an integer randomly drawn from the interval [1, CW], where CW is a contention window value selected based upon the priority of the traffic to be transmitted. The backoff counter is decremented for each idle contention slot detected. When the backoff counter reaches zero, the device attempts to transmit in the next contention slot. If the device receives no acknowledgement or an incorrect acknowledgment, then the transmission has failed. After a failed transmission, CW is set by alternately doubling the CW value up to a CWmax value for the user priority. CW is unchanged, if it was doubled in the last setting; and CW is doubled, if it was unchanged in the last setting.
Public/Granted literature
- US20100195664A1 Smart Adjustment of Backoff Counter and Contention Window for Improved Random Access Public/Granted day:2010-08-05
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