Multiplex communications – Data flow congestion prevention or control – Control of data admission to the network
Reexamination Certificate
2011-01-04
2011-01-04
Phan, Tri H (Department: 2471)
Multiplex communications
Data flow congestion prevention or control
Control of data admission to the network
C370S235000, C370S445000, C370S461000
Reexamination Certificate
active
07864674
ABSTRACT:
Quality of Service (QoS) support is provided by means of a Tiered Contention Multiple Access (TCMA) distributed medium access protocol that schedules transmission of different types of traffic based on their service quality specifications. In one embodiment, a wireless station is supplied with data from a source having a lower QoS priority, such as file transfer data. Another wireless station is supplied with data from a source having a higher QoS priority, such as voice and video data. Each wireless station can determine the urgency class of its pending packets according to a scheduling algorithm. Pending packets in a given urgency class are transmitted before transmitting packets of a lower urgency class by relying on class-differentiated urgency arbitration times, which are the idle time intervals required before the random backoff counter is decreased.
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AT&T Intellectual Property II L.P.
Phan Tri H
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