| 摘要 |
<P>PROBLEM TO BE SOLVED: To provide a data communication network system which allows a carrier to reduce initial investment and can provide a user with inexpensive high-speed communication service. <P>SOLUTION: In a data communication network system, there exist a first network (cable system 201) with high delay and high quality and second networks (WAN 101, 102) together. The data communication network system comprises WAN (Wide Area Network) speeding-up devices (31, 32) for virtually expanding a communication band by applying technologies of optimizing TCP (Transmission Control Protocol) protocol, data compression, cache, and QoS (Quality of Service), and applies the WAN speeding-up devices (31, 32) to the first network (cable system 201) section only. <P>COPYRIGHT: (C)2012,JPO&INPIT |
