Data communications system

• US 7,746,906 B2
• Filed: 07/10/2006
• Issued: 06/29/2010
• Est. Priority Date: 01/25/2000
• Status: Active Grant

• Current Assignee: Fujitsu Limited
• Original Assignee: Fujitsu Limited
• Inventors: Koga, Hisashi, Jinzaki, Akira
• Primary Examiner(s): NGUYEN, HANH N
• Application Number:
  US11/456,237
• Publication Number:
  US 20060239296A1
• Time in Patent Office: 1,450 Days
• Field of Search: 370/350, 370/470, 370/474, 370/473, 370/503, 370/509, 370/512, 370/394, 370/412, 714/776, 714/713, 714/747, 710/30
• US Class Current: 370/503
• CPC Class Codes: H04L 12/40058 Isochronous transmission
• CPC Class Codes: H04L 12/40071 Packet processing; Packet format adaptation of digital video signals for transport over a specific network H04N21/2381, H04N21/4363, H04N21/4381; packet switches H04L49/00; intermediate storage or scheduling H04L49/90
• CPC Class Codes: H04L 12/40117 Interconnection of audio or video/imaging devices home automation networks H04L12/2803; bitstream network arrangements specially adapted for distribution of digital video signals H04N7/24
• CPC Class Codes: H04L 12/64 Hybrid switching systems
• CPC Class Codes: H04L 12/6418 Hybrid transport
• CPC Class Codes: H04L 65/1101 Session protocols
• 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 69/164 Adaptation or special uses of UDP protocol
• CPC Class Codes: H04L 69/166 IP fragmentation; TCP segmentation
• CPC Class Codes: H04L 69/168 specially adapted for link layer protocols, e.g. asynchronous transfer mode [ATM], synchronous optical network [SONET] or point-to-point protocol [PPP]
• CPC Class Codes: H04L 69/32 Architecture of open systems interconnection [OSI] 7-layer type protocol stacks, e.g. the interfaces between the data link level and the physical level
• CPC Class Codes: H04L 9/40 Network security protocols

Abstract

A transmitting side relay device comprises additional information generation means for generating additional information about the characteristics of a data stream, packet generation means for generating a packet by attaching additional information to each transfer unit and transmitting means for transmitting the packet to the third network according to prescribed procedures. A receiving side relay device comprises separation means for breaking down the received packet into additional information and a transfer unit, analysis means for analyzing the additional information, reproduction means for locating information included in a corresponding transfer unit in an appropriate position and reproducing the data stream and output means for outputting the data stream reproduced by the reproduction means to the second network.

Claims

1. A system for conducting communications using a plurality of network routes with different communications delay, comprising:

a transmitting unit transmitting a plurality of split communications data with additional information for split communications; and

a receiving unit uniting, synchronizing and receiving the plurality of split communications data based on the additional information, and

wherein each of a plurality of senders has said transmitting unit, independently transmits communications data, each of a plurality of receivers having said receiving unit comprises a synchronization unit adjusting a synchronization state by observing a reproduction state of receiving data and secures synchronization of communications data by adjusting the synchronization by said synchronization unit.

2. The system according to claim 1, wherein the additional information is one of a channel number of communications data, an origination time of communications data and a generation time of communications data.

3. The system according to claim 1, wherein existence/non-existence of specific data, including voice, pictures, or information about a specific pattern is used for the additional information.

4. The system according to claim 1, wherein said transmitting unit divides communications data into a plurality of split data and transmits the split data via a plurality of network routes.