发明申请
- 专利标题： Network system and communication method, and information processing apparatus, method and program
- 专利标题（中）： 网络系统和通信方法，信息处理设备，方法和程序
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申请号： US10515642申请日： 2004-03-12
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公开(公告)号： US20050177646A1公开(公告)日： 2005-08-11
- 发明人: Shinichi Kawano , Yukihiko Aoki , Tadashi Adachihara , Shoji Araki
- 申请人： Shinichi Kawano , Yukihiko Aoki , Tadashi Adachihara , Shoji Araki
- 申请人地址： JP Shinagawa, Tokyo 141-0001
- 专利权人： Sony Corporation
- 当前专利权人： Sony Corporation
- 当前专利权人地址： JP Shinagawa, Tokyo 141-0001
- 优先权： JP2003-092396 20030328
- 国际申请： PCT/JP04/03340 WO 20040312
- 主分类号： H04L12/46
- IPC分类号： H04L12/46 ; H04L12/70 ; H04L29/12 ; G06F15/173 ; G06F15/16
摘要：
The present invention relates to a network system allowing easy communications with another apparatus via NAPT, a communication method, information processing apparatus and method, and a program. A local communication apparatus 11 acquires a service providing packet from an apparatus service providing apparatus 51 via a port 342-1 of a relay apparatus 12, acquires a service providing packet from an apparatus service providing apparatus 52 via a port 342-2 of the relay apparatus 12, calculates a difference value between two pieces of global address information contained in the service providing packets, and predicts that a port 342-3 is the port to be used for the next communication. The present invention can be applied to an instant message service system.
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