MEDIA DELIVERY USING QoS DIFFERENTIATION WITHIN MEDIA STREAM

Title:

MEDIA DELIVERY USING QoS DIFFERENTIATION WITHIN MEDIA STREAM

Document Type and Number:

Japanese Patent JP2005168002

Kind Code:

A

Abstract:

To apply QoS differentiation to a media stream transmitted from a transmitting station (STA) to a receiving STA in a WLAN system.

The transmitting STA generates a base sub-stream and one or a plurality of enhancement sub-streams for subsequent transmission via a wireless communication channel and moreover assigns different priorities to different sub-streams. Depending on channel conditions, the transmitting STA may select and discard, without transmission, portions of data from enhancement sub-streams. This selection process is based on the assigned priority and operates to preserve as much as relatively high-priority data as possible. The receiving STA then processes the received data to generate a reconstructed media stream. This stream provides signal quality equal to or higher than the signal quality supported by the base sub-stream.

Inventors:

RAMPRASHAD SEAN A

Application Number:

JP2004328327A

Publication Date:

June 23, 2005

Filing Date:

November 12, 2004

Export Citation:

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Assignee:

AGERE SYSTEMS INC

International Classes:

H04L12/28; H04L12/56; H04W72/12; H04L1/00; H04W72/10; H04W74/08; H04W84/12; (IPC1-7): H04L12/28; H04L1/00; H04L12/56

Domestic Patent References:

JPH0923214A	1997-01-21
JP2003525546A	2003-08-26
JP2003309573A	2003-10-31
JP2000286893A	2000-10-13

Foreign References:

WO2004109981A1	2004-12-16
WO2002091743A2	2002-11-14

Attorney, Agent or Firm:

Masao Okabe
Nobuaki Kato
Kazuo
Okabe
Shinichi Usui
Takao Ochi
Teruhisa Motomiya
Asahi Shinmitsu
Katsumi Miyama

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