Multiplex communications – Data flow congestion prevention or control – Control of data admission to the network
Reexamination Certificate
2005-03-23
2009-12-01
Ngo, Ricky (Department: 2416)
Multiplex communications
Data flow congestion prevention or control
Control of data admission to the network
C370S231000, C370S235000
Reexamination Certificate
active
07626931
ABSTRACT:
In view of the foregoing, the present invention provides a unified software framework or architecture for distributed coordination of wireless devices and radios, referred to as Layer 2.5 Software MAC (or ‘SoftMAC’), which resides between the standard 802.11 MAC layer (Layer 2) and IP layer (Layer 3) to regulate and control the amount of traffic (both real-time and “best effort”) delivered to 802.11 MAC DCF interfaces. The software based design can be ported to different OS platforms and systems and is capable of handling new hardware interfaces and MAC mechanisms (e.g., 802.11e) with only a software upgrade. The invention thus provides a natural way to make end systems support coordination of different radios of device(s), achieving better performance. Advantages of the 2.5 layer software MAC in accordance with the invention include: (a) there are no hardware constraints; (b) heterogeneous wireless/radio support is provided at the 2.5 layer; and (c) an evolutionary and extensible solution with the ability to support future wireless MAC/PHY chip combinations.
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Liu Yunxin
Wu Haitao
Zhang Qian
Microsoft Corporation
Ngo Ricky
Patel Chandrahas
Woodcock & Washburn LLP
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