Apparatus for transmitting/receiving a bit stream in a network and method therefor

• US 7,616,661 B2
• Filed: 01/02/2001
• Issued: 11/10/2009
• Est. Priority Date: 02/26/2000
• Status: Expired due to Fees

• Current Assignee: Samsung Electronics Co. Ltd.
• Original Assignee: Samsung Electronics Co. Ltd.
• Inventors: Kim, In-hwan, Bae, Dae-gyu, Park, Dong-seek, Park, Jeong-hoon, Lee, Yung-lyul
• Primary Examiner(s): Sheikh; Ayaz R
• Assistant Examiner(s): LEE, ANDREW CHUNG CHEUNG
• Application Number:
  US09/751,848
• Publication Number:
  US 20010043615A1
• Time in Patent Office: 3,234 Days
• Field of Search: 370/474, 370/231, 370/251, 370/242, 370/247, 370/248, 370/252, 370/230
• US Class Current: 370/474
• CPC Class Codes: H04L 1/16 in which the return channel carries supervisory signals, e.g. repetition request signals
• CPC Class Codes: H04L 65/1101 Session protocols
• CPC Class Codes: H04L 65/1106 Call signalling protocols; H.323 and related
• CPC Class Codes: H04L 65/65 Network streaming protocols, e.g. real-time transport protocol [RTP] or real-time control protocol [RTCP]
• CPC Class Codes: H04L 65/70 Media network packetisation
• CPC Class Codes: H04L 69/16 Implementation or adaptation of Internet protocol [IP], of transmission control protocol [TCP] or of user datagram protocol [UDP]
• CPC Class Codes: H04L 69/161 Implementation details of TCP/IP or UDP/IP stack architecture; Specification of modified or new header fields
• CPC Class Codes: H04L 69/163 In-band adaptation of TCP data exchange; In-band control procedures
• CPC Class Codes: H04L 69/164 Adaptation or special uses of UDP protocol
• CPC Class Codes: H04L 69/22 Parsing or analysis of headers
• CPC Class Codes: H04L 69/324 in the data link layer [OSI layer 2], e.g. HDLC
• CPC Class Codes: H04N 21/234327 by decomposing into layers, e.g. base layer and one or more enhancement layers
• CPC Class Codes: H04N 21/6125 involving transmission via Internet transmission by internet of broadcast information H04H60/82
• CPC Class Codes: H04N 21/6131 involving transmission via a mobile phone network wireless downlink channel access H04W74/006
• CPC Class Codes: H04N 21/6375 for requesting retransmission , e.g. of data packets lost or corrupted during transmission from serverARQ protocols H04L1/18; implementation or adaptation of Internet protocol [IP], of transmission control protocol [TCP] or of user datagram protocol [UDP] H04L69/16
• CPC Class Codes: H04N 21/64322 IP
• CPC Class Codes: H04N 21/6437 Real-time Transport Protocol [RTP]
• CPC Class Codes: H04N 21/64707 for transferring content from a first network to a second network, e.g. between IP and wireless
• CPC Class Codes: H04N 7/17318 Direct or substantially direct transmission and handling of requests

Abstract

An apparatus and method of transceiving a bit stream, by which a video bit stream is stably transmitted by the effective use of two logic channels when communication is established by the two logic channels during transmission of the video bit stream in a communication network, is provided. In this method, a source is encoded into a bit stream using a predetermined type of coding. Then, the encoded bit stream is transmitted to each communication protocol layer, while the header of each communication protocol layer is added to a payload. The header is transmitted separately from the bit stream.

Claims

1. A method of transmitting a bit stream in a communication network from a first terminal to a second terminal, the method comprising:

(a) coding source data into the bit stream using a predetermined type of coding;

(b) adding a header from each communication protocol layer to a payload while transmitting the bit stream coded in operation (a) to each communication protocol layer; and

(c) transmitting, from the first terminal to the second terminal, the header separately from the bit stream transmitted in the operation (b),

wherein in the operation (c), a bit stream, to which header information has been added by undergoing each communication protocol layer, is transmitted in an unacknowledged mode protocol, and only the header information in the bit stream is separately transmitted in an acknowledged mode protocol; and

wherein, when a number of times of re-transmission of a bit stream transmitted in an acknowledged mode protocol is equal to or less than a predetermined number of times, the bit stream, which has been transmitted in an unacknowledged mode protocol, is transmitted in an acknowledged mode protocol.

2. The method of claim 1, wherein the header information in the bit stream is simultaneously transmitted in an acknowledged mode protocol with the bit stream.

3. The method of claim 2, wherein the acknowledged mode protocol is a transmission control protocol (TCP), and the unacknowledged mode protocol is a user datagram protocol (UDP).

4. The method of claim 2, wherein the acknowledged mode protocol re-transmits Internet protocol (IP) packets or radio link protocol (RLP) packets.

5. The method of claim 1, wherein the header information in the bit stream is simultaneously transmitted in the unacknowledged mode protocol with the bit stream.

6. The method of claim 5, wherein the acknowledged mode protocol re-transmits Internet protocol (IP) packets or radio link layer protocol (RLP) packets.

7. The method of claim 1, wherein, when a transmission error occurs, the bit stream, to which headers have been added by undergoing each communication protocol layer, is re-transmitted in an acknowledged or unacknowledged mode protocol.

8. The method of claim 7, wherein the acknowledged mode protocol re-transmits Internet protocol (IP) packets or radio link protocol (RLP) packets.

9. The method of claim 1, wherein the acknowledged mode protocol is a transmission control protocol (TCP), and the unacknowledged mode protocol is a user datagram protocol (UDP).

10. The method of claim 1, wherein the acknowledged mode protocol re-transmits Internet protocol (IP) packets or radio link protocol (RLP) packets.

11. The method of claim 1, wherein the headers are a payload header, a real time protocol (RTP) header, a user datagram protocol (UDP) or transmission control protocol (TCP) header, an Internet protocol (IP) header, a radio link protocol (RLP) header, and a layer 2 (L2) header, which are added after a bit stream is passed through each layer.

12. The method of claim 1, wherein the payload includes multimedia data.

13. A method of transmitting a bit stream in a communication network, the method comprising:

(a) coding source data into the bit stream using a predetermined type of coding;

(b) adding a header from each communication protocol layer to a payload while transmitting the bit stream coded in the operation (a) to each communication protocol layer; and

(c) separately transmitting the payload and the header,

wherein in the operation (c), a payload in a bit stream, which has passed through each communication protocol layer, is transmitted in an unacknowledged mode protocol, and only the header information is separately transmitted in an acknowledged mode protocol; and

wherein, when a number of times of re-transmission of a bit stream transmitted in an acknowledged mode protocol is equal to or less than a predetermined number of times, the bit stream, which has been transmitted in an unacknowledged mode protocol, is transmitted in an acknowledged mode protocol.

14. The method of claim 13, wherein the header information in the bit stream is simultaneously transmitted in an acknowledged mode protocol with the payload.

15. The method of claim 14, wherein the acknowledged mode protocol is a transmission control protocol (TCP), and the unacknowledged mode protocol is a user datagram protocol (UDP).

16. The method of claim 13, wherein the acknowledged mode protocol is a transmission control protocol (TCP), and the unacknowledged mode protocol is a user datagram protocol (UDP).

17. The method of claim 13, wherein the acknowledged mode protocol re-transmits Internet protocol (IP) packets or radio link protocol (RLP) packets.

18. The method of claim 14, wherein the acknowledged mode protocol re-transmits Internet protocol (IP) packets or radio link protocol (RLP) packets.

19. The method of claim 13, wherein the headers are a payload header, a real time protocol (RTP) header, a user datagram protocol (UDP) or transmission control protocol (TCP) header, an Internet protocol (IP) header, a radio link protocol (RLP) header, and a layer 2 (L2) header, which are added after a bit stream is passed through each layer.

20. The method of claim 13, wherein the payload includes multimedia data.

21. An apparatus for transmitting a bit stream in a communication network, the apparatus comprising:

an encoder for encoding source data into a bit stream using a predetermined type of coding;

a protocol processing unit for adding a header of each communication protocol layer to a payload while transmitting the bit stream encoded by the encoder to each communication protocol layer; and

a packet processing unit for transmitting the bit stream processed by the protocol processing unit in an unacknowledged mode protocol and separately transmitting only header information in an unacknowledged or acknowledged mode protocol;

wherein, when a number of times of re-transmission of a bit stream transmitted in an acknowledged mode protocol is equal to or less than a predetermined number of times, the bit stream, which has been transmitted in an unacknowledged mode protocol, is transmitted in an acknowledged mode protocol.

22. An apparatus for relaying and receiving a bit stream in a communication network, the apparatus comprising:

an extractor for separately extracting payloads and header information, which corresponds to the header of each layer, while receiving a bit stream and a header information received in an acknowledged or unacknowledged mode protocol in the communication network to each layer;

an error determination processing unit for determining whether the header information extracted by the extractor has error;

a bit stream re-organizing unit for re-organizing a bit stream using the header information extracted by the extractor; and

a decoder for decoding a bit stream re-organized by the bit stream re-organizing unit,

wherein only the header information is transmitted in an acknowledged mode protocol; and

wherein, when a number of times of re-transmission of a bit stream transmitted in an acknowledged mode protocol is equal to or less than a predetermined number of times, the bit stream, which has been transmitted in an unacknowledged mode protocol, is transmitted in an acknowledged mode protocol.

23. The apparatus for relaying and receiving a bit stream in a communication network of claim 22, wherein the error determination processing unit also requests re- transmission if it is determined that the header information has error.

24. A computer-readable recording medium having embodied thereon a computer program for performing a method of transmitting a bit stream in a communication network, the method comprising:

(a) coding source data into the bit stream using a predetermined type of coding;

(b) adding a header from each communication protocol layer to a payload while transmitting the bit stream coded in the operation (a) to each communication protocol layer; and

(c) transmitting the header separately from the bit stream transmitted in the operation (b),

wherein in the operation (c), a bit stream, to which header information has been added by undergoing each communication protocol layer, is transmitted in an unacknowledged mode protocol, and only the header information in the bit stream is separately transmitted in an acknowledged mode protocol; and

wherein, when a number of times of re-transmission of a bit stream transmitted in an acknowledged mode protocol is equal to or less than a predetermined number of times, the bit stream, which has been transmitted in an unacknowledged mode protocol, is transmitted in an acknowledged mode protocol.

25. The computer-readable recording medium of claim 24, wherein the header information in the bit stream is simultaneously transmitted in an acknowledged mode protocol with the bit stream.

26. The computer-readable recording medium of claim 25, wherein the acknowledged mode protocol is a transmission control protocol (TCP), and the unacknowledged mode protocol is a user datagram protocol (UDP).

27. The computer-readable recording medium of claim 25, wherein the acknowledged mode protocol re-transmits Internet protocol (IP) packets or radio link protocol (RLP) packets.

28. The computer-readable recording medium of claim 24, wherein the header information in the bit stream is simultaneously transmitted in the unacknowledged mode protocol with the bit stream.

29. The computer-readable recording medium of claim 28, wherein the acknowledged mode protocol re-transmits Internet protocol (IP) packets or radio link protocol (RLP) packets.

30. The computer-readable recording medium of claim 24, wherein, when a transmission error occurs, the bit stream, to which headers have been added by undergoing each communication protocol layer, is re-transmitted in an acknowledged or unacknowledged mode protocol.

31. The computer-readable recording medium of claim 30, wherein the acknowledged mode protocol re-transmits Internet protocol (IP) packets or radio link layer protocol (RLP) packets.

32. The computer-readable recording medium of claim 24, wherein the acknowledged mode protocol is a transmission control protocol (TCP), and the unacknowledged mode protocol is a user datagram protocol (UDP).

33. The computer readable recording medium of claim 24, wherein the acknowledged mode protocol re-transmits Internet protocol (IP) packets or radio link protocol (RLP) packets.

34. The computer-readable recording medium of claim 24, wherein the headers are a payload header, a real time protocol (RTP) header, a user datagram protocol (UDP) or transmission control protocol (TCP) header, an Internet protocol (IP) header, a radio link protocol (RLP) header, and a layer 2 (L2) header, which are added after a bit stream is passed through each layer.

35. The computer-readable recording medium of claim 24, wherein the payload includes multimedia data.

36. A computer-readable recording medium having embodied thereon a computer program for performing a method of transmitting a bit stream in a communication network, the method comprising:

(a) coding source data into the bit stream using a predetermined type of coding;

(b) adding a header from each communication protocol layer to a payload while transmitting the bit stream coded in the operation (a) to each communication protocol layer; and

(c) separately transmitting the payload and the header,

wherein in the operation (c), a payload in a bit stream, which has passed through each communication protocol layer, is transmitted in an unacknowledged mode protocol, and only the header information is separately transmitted in an acknowledged mode protocol; and

wherein, when a number of times of re-transmission of a bit stream transmitted in an acknowledged mode protocol is equal to or less than a predetermined number of times, the bit stream, which has been transmitted in an unacknowledged mode protocol, is transmitted in an acknowledged mode protocol.

37. The computer-readable recording medium of claim 36, wherein the header information in the bit stream is simultaneously transmitted in an acknowledged mode protocol with the payload.

38. The computer-readable recording medium of claim 37, wherein the acknowledged mode protocol is a transmission control protocol (TCP), and the unacknowledged mode protocol is a user datagram protocol (UDP).

39. The computer-readable recording medium of claim 37, wherein the acknowledged mode protocol re-transmits Internet protocol (IP) packets or radio link protocol (RLP) packets.

40. The computer-readable recording medium of claim 36, wherein the acknowledged mode protocol is a transmission control protocol (TCP), and the unacknowledged mode protocol is a user datagram protocol (UDP).

41. The computer-readable recording medium of claim 36, wherein the acknowledged mode protocol re-transmits Internet protocol (IP) packets or radio link protocol (RLP) packets.

42. The computer-readable recording medium of claim 36, wherein the headers are a payload header, a real time protocol (RTP) header, a user datagram protocol (UDP) or transmission control protocol (TCP) header, an Internet protocol (IP) header, a radio link protocol (RLP) header, and a layer 2 (L2) header, which are added after a bit stream is passed through each layer.

43. The computer-readable recording medium of claim 36, wherein the payload includes multimedia data.