SYSTEM AND METHOD FOR WIRELESS COMMUNICATION OF UNCOMPRESSED VIDEO HAVING DELAY-INSENSITIVE DATA TRANSFER

• US 20080130617A1
• Filed: 10/05/2007
• Published: 06/05/2008
• Est. Priority Date: 12/04/2006
• Status: Active Grant

• Current Assignee: Samsung Electronics Co. Ltd.
• Original Assignee: Samsung Information Systems America Incorporated (Samsung Electronics Co. Ltd.)
• Inventors: Singh, Harkirat, Shao, Huai-Rong, Ngo, Chiu, Qin, Xiangping
• Granted Patent: US 8,169,995 B2
• Time in Patent Office: Days
• US Class Current: 370/345
• CPC Class Codes: H04L 1/1671 the supervisory signal being transmitted together with control information
• CPC Class Codes: H04N 19/89 involving methods or arrangements for detection of transmission errors at the decoder
• CPC Class Codes: H04N 21/238 Interfacing the downstream path of the transmission network, e.g. adapting the transmission rate of a video stream to network bandwidth; Processing of multiplex streams hybrid fiber coaxial [HFC] networks for downstream channel allocation for video distribution H04L12/2801; flow control in packet networks H04L47/10; real-time communication protocols in data switching networks H04L65/00; scheduling or organising the servicing of application requests H04L67/60
• CPC Class Codes: H04N 21/43615 Interfacing a Home Network, e.g. for connecting the client to a plurality of peripherals home Audio Video Interoperability [HAVI] data switching networks H04L12/2805
• CPC Class Codes: H04N 21/43637 involving a wireless protocol, e.g. Bluetooth, RF or wireless LAN [IEEE 802.11] arrangements for wireless networking or broadcasting of information in indoor or near-field type systems H04B10/114
• CPC Class Codes: H04N 21/8458 involving uncompressed content
• CPC Class Codes: H04W 28/065 using assembly or disassembly of packets

Abstract

A system and method using a medium access control (MAC) header for a wireless communication system including an application layer, a MAC layer, and a physical (PHY) layer is disclosed. The MAC header accommodates time-delay insensitive data transfer between devices located in the network. The MAC header finds particular benefits in short range networks that transfer high definition (HD) video between components. One embodiment of the invention comprises a method of transferring data in a wireless communication network for uncompressed video including fragmenting the data into a plurality of data packets; appending a PHY header to at least one of the data packets to form a MAC frame; setting a field in the PHY header to indicate that the packets do not contain audio video (A/V) data; and transmitting the MAC frame to another device in the wireless communication network.

Claims

1. A method of transferring data in a wireless communication network for uncompressed video, the method comprising:

fragmenting the data into a plurality of data packets;

appending a PHY header to at least one of the data packets to form a medium access control (MAC) frame;

setting a field in the PHY header to indicate that the packets do not contain audio video (A/V) data; and

transmitting the MAC frame to another device in the wireless communication network.

2. The method of claim 1, wherein after the data has been transmitted, transmitting packetizes uncompressed video with the MAC frame and setting the field of the PHY header to indicate A/V data is being transferred.

3. The method of claim 1, further comprising fragmenting at least one of the data packets into a predetermined number of sub-packets, wherein the predetermined number of sub-packets when the sub-packets do not contain A/V data is different from the number of the sub-packets when the A/V data is transferred.

4. The method of claim 3, wherein the predetermined number of sub-packets are same as a number of acknowledgment (ACK) groups in the another device such that a PHY layer in the other device does not apply an acknowledgment group mapping for mapping the sup-packets to the ACK groups.

5. The method of claim 4, wherein each ACK group is appended by a cyclic redundancy checksum (CRC), wherein the CRC is handled by the PHY layer.

6. The method of claim 5, wherein all the sub-packets in an ACK group are moved to a MAC layer in a receiver side by a PHY layer of the receiver side.

7. The method of claim 6, wherein the MAC layer selectively select sub-packets whose own CRCs are correct.

8. The method of claim 1, further comprising a retransmission indicator field configured to indicate the retransmission status of each sub-packet.

9. The method of claim 1, further comprising appending a MAC header to at least one of the data packets to form the MAC frame.

10. The method of claim 9, wherein each of the sub-packets comprises own MAC header such that errors in one MAC header do not affect other sub-packets.

11. The method of claim 9, wherein the sub-packets share one MAC header.

12. The method of claim 1, wherein the A/V data comprise video, audio, and control.

13. The method of claim 1, wherein the MAC frame comprises a MAC header, wherein the MAC frame further comprises a header CRC for the PHY header and the MAC header.

14. The method of claim 1, wherein each of the plurality of data packets comprises a sub-packet, and wherein the sub-pack comprises a plurality of small payloads.

15. The method of claim 14, wherein each of the small payloads comprises a sub-sub-packet.

16. The method of claim 14, wherein each of the small payloads comprises a payload header comprising fields for length, sequence number, fragment control, CRC, and MSDU.

17. The method of claim 14, wherein each of the small payloads comprises a known pattern.

18. The method of claim 1, wherein the PHY and MAC headers are designed to fit into 3 orthogonal frequency division multiplexing (OFDM) symbols.

19. A system for transferring data in a wireless communication network for uncompressed video, the system comprising:

a transmitter configured to receive data and generate a plurality of medium access control (MAC) frame according to a first format, the transmitter comprising a physical (PHY) layer and a MAC layer; and

a receiver configured to receive the plurality of MAC frame from the transmitter and extract original data according to the first format, comprising a physical (PHY) layer and a medium access control (MAC) layer,

wherein the MAC frame comprises a field to indicate that data packets in the MAC frame do not contain audio video (A/V) data.

20. The system of claim 19, wherein after the data has been transmitted, the MAC frame contains uncompressed video and the field of the MAC frame is set to indicate A/V data is being transferred, and wherein the transmitter and the receiver use a second format of the MAC frame.

21. The system of claim 19, wherein the transmitter further comprises a detector configured to detect whether the data contains the A/V data and a controller to set the field of the MAC frame according to a signal from the detector.

22. A system for transferring data in a wireless communication network for uncompressed video, the system comprising:

a transmitter configured to receive data and generate a plurality of medium access control (MAC) frame according to a first format, the transmitter comprising a physical (PHY) layer and a MAC layer; and

a receiver configured to receive the plurality of MAC frame from the transmitter and extract original data according to the first format, comprising a physical (PHY) layer and a medium access control (MAC) layer,

wherein the data packets in the MAC frame do not contain audio video (A/V) data.

23. A system for transferring data in a wireless communication network for uncompressed video, the system comprising:

means for fragmenting the data into a plurality of data packets;

means for appending a PHY header to at least one of the data packets to form a medium access control (MAC) frame;

means for setting a field in the PHY header to indicate that the packets do not contain audio video (A/V) data; and

means for transmitting the MAC frame to another device in the wireless communication network.

24. The system of claim 23, wherein the field in the PHY header comprises a bit.

25. The system of claim 23, wherein the system is configured to transfer delay-insensitive data.