System and method for wireless communication of uncompressed video having a beacon length indication

• US 8,102,835 B2
• Filed: 11/07/2007
• Issued: 01/24/2012
• Est. Priority Date: 12/04/2006
• Status: Active Grant

• Current Assignee: Samsung Electronics Co. Ltd.
• Original Assignee: Samsung Electronics Co. Ltd.
• Inventors: Shao, Huai-Rong, Singh, Harkirat, Qin, Xiangping, Ngo, Chiu
• Primary Examiner(s): Sefcheck, Gregory
• Assistant Examiner(s): Shivers, Ashley
• Application Number:
  US11/936,495
• Publication Number:
  US 20080129880A1
• Time in Patent Office: 1,539 Days
• Field of Search: None
• US Class Current: 370/349
• CPC Class Codes: H04W 28/06 Optimizing the usage of the radio link, e.g. header compression, information sizing , discarding information system modifying transmission characteristic according to link quality by modifying frame length H04L1/0007; dynamic adaptation of the packet size for flow control or congestion control H04L47/365

Abstract

A system and method for efficiently communicating messages over a low-rate channel between multiple devices in a system for wireless communication of uncompressed video is disclosed. A beacon length indication and processing method is provided to solve the problem of long beacon processing delay at the MAC layer of a receiving station.

Claims

1. A system for wireless communication of uncompressed video comprising:

a processor for generating a beacon length indication value representing the time length of a beacon frame;

a memory in communication with the processor to store the beacon length indication value; and

a transmitter for wirelessly transmitting the beacon length indication value, wherein the beacon length indication value is added to a medium access control protocol data unit (MPDU) length subfield of a long low-rate physical layer (LRP) header, wherein the beacon length indication value is placed in an LRP payload indication primitive, wherein the LRP payload indication primitive is obtained before a corresponding beacon frame such that a receiver may receive the LRP payload indication primitive prior to the entire beacon frame and wherein the process for contending the current LRP channel is completed before the completion of processing of the beacon frame by a receiving station.

2. The system of claim 1, wherein the beacon length indication value represents the time length of the beacon frame belonging to a current superframe.

3. The system of claim 1, wherein the beacon length indication value represents the time length of the beacon frame belonging to a next superframe.

4. The system of claim 3, wherein each beacon frame includes control and management information for the next superframe instead of a current superframe.

5. The system of claim 1, wherein the beacon length indication value is stored in the beacon frame.

6. The system of claim 5, wherein the payload indication primitive, PHY_LRP_Payload_length.indication( ), is transmitted from a physical layer (PHY) receiving station (PHY-RX) to a medium access control (MAC) layer receiving station (MAC-RX).

7. The system of claim 6, wherein the PHY-RX obtains the beacon length indication value by parsing the MPDU length sub-field of the long LRP header received from a transmitting station.

8. The system of claim 7, wherein the MAC-RX receives the beacon length indication prior to beacon processing completion time to immediately contend a current LRP channel at a contention based control period without waiting for beacon process completion at the MAC-RX.

9. The system of claim 7, wherein processing delay is reduced by receiving the beacon length indication prior to beacon processing completion time.

10. A system for wireless communication of uncompressed video comprising:

a receiver for wirelessly receiving a beacon length indication value representing the time length of a beacon frame, wherein the beacon length indication value is added to a medium access control protocol data unit (MPDU) length subfield of a long low-rate physical layer (LRP) header, wherein the beacon length indication value is placed in an LRP payload indication primitive;

a first memory to store the beacon length indication value; and

a processor in data communication with the first memory for initiating and completing a process for contending a current LRP channel using the beacon length indication value before the completion of processing of the beacon frame by a receiving station, wherein the LRP payload indication primitive is received before a corresponding beacon frame such that the receiver receives the LRP payload indication primitive prior to the entire beacon frame.

11. The system of claim 10, wherein the beacon length indication value represents the time length of the beacon frame belonging to a current superframe.

12. The system of claim 10, wherein the beacon length indication value represents the time length of the beacon frame belonging to a next superframe.

13. A method of processing of beacon frames in a system for wireless communication of uncompressed video, the method comprising:

generating a beacon length indication value representing the time length of a beacon frame;

storing the beacon length indication value in a beacon frame by adding the beacon length indication value to a medium access control protocol data unit (MPDU) length subfield of a long low-rate physical layer (LRP) header, wherein the beacon length indication value is placed in an LRP payload indication primitive; and

wirelessly transmitting the beacon frame, wherein the LRP payload indication primitive is received before a corresponding beacon frame such that a receiver may receive the LRP payload indication primitive prior to the entire beacon frame and wherein the process for contending the current LRP channel is completed before the completion of processing of the beacon frame by a receiving station.

14. The method of claim 13, wherein the beacon length indication value represents the time length of the beacon frame belonging to a current superframe.

15. The method of claim 13, wherein the beacon length indication value represents the time length of the beacon frame belonging to a next superframe.

16. The method of claim 13, wherein the generating the beacon length indication value is performed by a media access control (MAC) layer of the transmitting station.

17. The method of claim 13, wherein the payload indication primitive is transmitted from a physical layer (PHY) receiving station (PHY-RX) to a medium access control (MAC) layer receiving station (MAC-RX).

18. A method of processing of beacon frames in a system for wireless communication of uncompressed video, the method comprising:

wirelessly receiving a beacon frame that includes a beacon length indication value representing the time length of a beacon frame by a receiving station, wherein the beacon length value is obtained from a medium access control protocol data unit (MPDU) length subfield of a long low-rate physical layer (LRP) header, wherein the beacon length indication value is placed in an LRP payload indication primitive; and

initiating and completing a process for contending a current low rate physical layer (LRP) channel using the beacon length indication value by the receiving station before the completion of processing of the beacon frame,

wherein the LRP payload indication primitive is received before a corresponding beacon frame such that the receiving station receives the LRP payload indication primitive prior to the entire beacon frame.

19. The method of claim 18 further comprising sending out a Channel Time Block (CTB) information request by the receiving station to a coordinator station within a first preset time if the receiving station does not receive part of the beacon frame that includes the beacon length indication value within a second preset time from a nominal beacon starting time.

20. The method of claim 18 further including parsing the beacon length indication value from the beacon frame.

21. The method of claim 20, wherein the parsing is performed by a physical (PHY) layer of the receiving station.

22. The method of claim 18, wherein the process for contending the current LRP channel is performed by a media access control (MAC) layer of the receiving station.

23. The method of claim 22, wherein the MAC layer receives the beacon length indication value and starts the process for contending the current LRP channel before the MAC layer completes processing of the beacon frame.

24. The method of claim 23, wherein the MAC layer contends the current LRP channel at Random Access Time Block (RATB) without waiting for the beacon process completion at the MAC layer.

25. A computer-usable non-transitory medium in a system for wireless communication of uncompressed video having computer readable code comprising instructions for:

processing and storing a beacon length indication value representing the time length of a beacon frame, wherein the beacon length indication value is added to a medium access control protocol data unit (MPDU) length subfield of a long low-rate physical layer (LRP) header, wherein the beacon length indication value is placed in an LRP payload indication primitive,

wherein the LRP payload indication primitive is received before a corresponding beacon frame such that a receiving station receives the LRP payload indication primitive prior to the entire beacon frame and wherein processing for contending the current LRP channel is completed before the completion of processing of the beacon frame by a receiving station.