SYSTEM AND METHOD FOR WIRELESS COMMUNICATION OF UNCOMPRESSED VIDEO USING SELECTIVE RETRANSMISSION

• US 20090138774A1
• Filed: 11/27/2007
• Published: 05/28/2009
• Est. Priority Date: 11/27/2007
• Status: Active Grant

• Current Assignee: Samsung Electronics Co. Ltd.
• Original Assignee: Samsung Electronics Co. Ltd.
• Inventors: Singh, Harkirat, Ngo, Chiu, Qin, Xiangping
• Granted Patent: US 8,205,126 B2
• Time in Patent Office: Days
• US Class Current: 714/748
• CPC Class Codes: H04L 1/0003 by switching between different modulation schemes
• CPC Class Codes: H04L 1/0009 by adapting the channel coding H04L1/1812 takes precedence
• CPC Class Codes: H04L 1/007 Unequal error protection for format H04L1/0078; for codes per se H03M13/35
• CPC Class Codes: H04L 1/1809 Selective-repeat protocols

Abstract

A system and method for wireless communication of data are disclosed. One embodiment of the system includes a transmitter configured to transmit a data packet including a plurality of displayable elements over a wireless channel. Each displayable element includes a plurality of portions including a most significant portion and a least significant portion. The data packet is divided into a plurality of data groups including a first data group and a second data group. The first data group includes the most significant portions of the displayable elements while the second data group includes the least significant portions of the displayable elements. The system also includes a receiver configured to receive the data packet over the wireless channel and to determine whether any of the data groups is in error. The transmitter is further configured to transmit to the receiver: a retransmission packet including a selected data group in error according to a quality of service associated with the displayable elements. One or more of the data groups can be included in the retransmission packet.

Claims

1. A method of selective retransmission for wireless communication of uncompressed video data, the method comprising:

receiving a data packet from a transmitter over a wireless channel, wherein the data packet comprises a plurality of displayable elements, each displayable element comprising a plurality of portions including a most significant portion and a least significant portion, wherein the data packet includes a plurality of data groups including a first data group and a second data group, the first data group including the most significant portions of the displayable elements, the second data group including the least significant portions of the displayable elements;

determining whether any of the data groups is in error; and

requesting retransmission of a selected data group in error according to a quality of service associated with the displayable elements, wherein one or more of the data groups can be included in the request.

2. The method of claim 1, wherein requesting the retransmission comprises requesting:

retransmission of only the first data group if only the first data group is in error;

and no retransmission if only the second data group is in error.

3. The method of claim 2, wherein requesting the retransmission comprises requesting retransmission of only the first data group if both of the first and second data groups are in error.

4. The method of claim 1, wherein requesting the retransmission comprises requesting retransmission of both of the first and second data groups if at least one of the first and second data groups is in error.

5. The method of claim 4, further comprising:

receiving a retransmission packet including first and second data groups;

determining whether any of the first and second data groups of the retransmission packet is in error;

selecting data groups which are not in error from the first and second data groups of the data packet and the first and second data groups of the retransmission packet; and

combining the selected data groups, thereby constructing a data packet including first and second data groups which have substantially no error.

6. The method of claim 1, wherein requesting the retransmission comprises requesting:

retransmission of only the first data group if only the first data group is in error;

retransmission of the first and second data groups if only the second data group is in error; and

retransmission of only the first data group if both of the first and second data groups are in error.

7. The method of claim 1, wherein requesting the retransmission comprises requesting:

retransmission of only the first data group if only the first data group is in error;

retransmission of only the second data group if only the second data group is in error; and

retransmission of the first and second data groups if both of the first and second data groups are in error.

8. The method of claim 1, further comprising receiving a retransmitted data group from the transmitter, wherein the data packet is encoded with a first modulation and coding scheme (MCS), wherein the retransmitted data group is encoded with a second modulation and coding scheme (MCS), and wherein the second MCS has a data rate substantially lower than that of the first MCS.

9. The method of claim 1, wherein the first and second data groups of the data packet have equal error protection.

10. The method of claim 1, wherein the first and second data groups of the data packet have unequal error protection.

11. The method of claim 1, wherein the displayable elements comprise pixel data of a video image.

12. The method of claim 11, wherein each of the pixel data comprises a most significant bit (MSB) and a least significant bit (LSB), wherein the most significant portion includes the most significant bit, and wherein the least significant portion includes the least significant bit.

13. The method of claim 12, wherein the quality of service associated with the displayable elements depends more on the most significant bit than on the least significant bit.

14. A method of selective retransmission for wireless communication of uncompressed video data, the method comprising:

transmitting a data packet from a transmitter to a receiver over a wireless channel, wherein the data packet comprises a plurality of displayable elements, each displayable element comprising a plurality of portions including a most significant portion and a least significant portion, wherein the data packet includes a plurality of data groups including a first data group and a second data group, the first data group including the most significant portions of the displayable elements, the second data group including the least significant portions of the displayable elements;

determining whether any of the data groups is in error; and

transmitting a retransmission packet including a selected data group in error according to a quality of service associated with the displayable elements, wherein one or more of the data groups can be included in the retransmission packet.

15. A system for wireless communication of uncompressed video data, the system comprising:

a transmitter configured to transmit a data packet over a wireless channel, wherein the data packet comprises a plurality of displayable elements, each displayable element comprising a plurality of portions including a most significant portion and a least significant portion, wherein the data packet includes a plurality of data groups including a first data group and a second data group, the first data group including the most significant portions of the displayable elements, the second data group including the least significant portions of the displayable elements;

a receiver configured to receive the data packet over the wireless channel, the receiver being configured to determine whether any of the data groups is in error; and

wherein the transmitter is further configured to transmit to the receiver;

a retransmission packet including a selected data group in error according to a quality of service associated with the displayable elements, wherein one or more of the data groups can be included in the retransmission packet.

16. The system of claim 15, wherein the retransmission packet includes only the first data group if only the first data group is in error;

and wherein the transmitter is configured to transmit no retransmission packet if only the second data group is in error.

17. The system of claim 15, wherein the retransmission packet includes both of the first and second data groups if at least one of the first and second data groups is in error.

18. The system of claim 17, wherein the receiver is further configured to determine whether any of the first and second data groups of the retransmission packet is in error, wherein the receiver is further configured to select data groups which are not in error from the first and second data groups of the data packet and the first and second data groups of the retransmission packet, and wherein the receiver is further configured to combine the selected data groups, thereby reconstructing the data packet.

19. The system of claim 15, wherein the retransmission packet includes:

only the first data group if only the first data group is in error;

the first and second data groups if only the second data group is in error; and

only the first data group if both of the first and second data groups are in error.

20. The system of claim 15, wherein the retransmission packet includes:

only the first data group if only the first data group is in error;

only the second data group if only the second data group is in error; and

the first and second data groups if both of the first and second data groups are in error.

21. The system of claim 15, wherein the data packet is encoded with a first modulation and coding scheme (MCS), wherein the retransmission packet is encoded with a second modulation and coding scheme (MCS), and wherein the second MCS has a data rate substantially lower than that of the first MCS.

22. The system of claim 15, wherein the displayable elements comprise pixel data of a video image, wherein each of the pixel data comprises a most significant bit (MSB) and a least significant bit (LSB), wherein the most significant portion includes the most significant bit, and wherein the least significant portion includes the least significant bit.

23. The method of claim 22, wherein the quality of service associated with the displayable elements depends more on the most significant bit than on the least significant bit.

24. A wireless communication device for transmitting uncompressed video data, the device comprising:

a transmitter configured to transmit a data packet to a receiver over a wireless channel, wherein the data packet comprises a plurality of displayable elements, each displayable element comprising a plurality of portions including a most significant portion and a least significant portion, wherein the data packet includes a plurality of data groups including a first data group and a second data group, the first data group including the most significant portions of the displayable elements, the second data group including the least significant portions of the displayable elements;

wherein the transmitter is further configured to receive information from the receiver, the information being indicative of whether any of the data groups is in error; and

wherein the transmitter is further configured to transmit to the receiver;

a retransmission packet including a selected data group in error according to a quality of service associated with the displayable elements, wherein one or more of the data groups can be included in the retransmission packet.

25. A wireless communication device for receiving uncompressed video data, the device comprising:

a receiver configured to receive a data packet from a transmitter over a wireless channel, wherein the data packet comprises a plurality of displayable elements, each displayable element comprising a plurality of portions including a most significant portion and a least significant portion, wherein the data packet includes a plurality of data groups including a first data group and a second data group, the first data group including the most significant portions of the displayable elements, the second data group including the least significant portions of the displayable elements;

wherein the receiver is further configured to determine whether any of the data groups is in error; and

wherein the receiver is further configured to send the transmitter a signal indicative of whether any of the data groups in the data packet is in error.