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Quality of service extensions for multimedia applications in wireless computer networks

  • US 6,934,752 B1
  • Filed: 07/13/2000
  • Issued: 08/23/2005
  • Est. Priority Date: 03/23/2000
  • Status: Active Grant
First Claim
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1. An interface between a wireless network component and a wireless medium, the interface communicating multimedia data streams as defined by a networking protocol that includes definitions of quality of service enhancements to provide reliable communications of said multimedia data streams, the quality of service enhancements comprising a capability information field and a multimedia control field within a media access control frame and including a frame position sub-field, pad byte sub-field, a stream index sub-field, a basic service set identification sub-field and a time stamp sub-field;

  • andwherein the capability information field consists of a multimedia capability bit to indicate whether a device is multimedia enhanced, a proxy point coordinator bit to indicate whether a device can provide proxy services, a alternate point coordinator capability bit to indicate whether a device can be an alternated point coordinator, and a channel sharing bit to indicate whether basic service set is sharing a channel with other overlapping basic service sets; and

    wherein the multimedia control field consists of 32 bits;

    wherein the 32 bits of the multimedia control field consists of five sub-fields; and

    the five sub-fields consist of;

    a first 2-bit sub-field indicating a frame position within a series of frames, a second 2-bit sub-field indicating a number of bytes padded in a frame to make an entire frame 4-byte aligned, a third 4-bit basis service set identification sub-field indicating when overlapping subnets need to operate in a same channel, a fourth 8-bit sub-field indicating an index number uniquely identifying the multimedia data streams, in which all values of the index are dynamically assigned and used, a fifth 16-bit time stamp sub-field used to provide support for synchronization of any two streams originating from a device.

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