发明授权
- 专利标题： IP communication apparatus and NAT type determination method by the same
- 专利标题（中）： IP通信设备和NAT类型确定方法
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申请号： US12104783申请日： 2008-04-17
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公开(公告)号： US07801059B2公开(公告)日： 2010-09-21
- 发明人: Akira Miyajima , Munetaka Washizu , Hirokazu Hayata , Takeshi Suga
- 申请人： Akira Miyajima , Munetaka Washizu , Hirokazu Hayata , Takeshi Suga
- 申请人地址： JP Osaka
- 专利权人： Panasonic Corporation
- 当前专利权人： Panasonic Corporation
- 当前专利权人地址： JP Osaka
- 代理机构： Greenblum & Bernstein P.L.C.
- 优先权： JP2007-111827 20070420; JP2007-171133 20070628
- 主分类号： H04L12/56
- IPC分类号： H04L12/56
摘要：
In a NAT type determination method pursuant to RFC 3489, address information added in a binding response from a STUN server in response to a binding request issued in a latest transmission test is compared with address information added in a binding response in response to any transmission test executed therebefore. When the address information are not identical, a NAT type is determined symmetric. Even when a router whose NAT type changes frequently according to a use status is connected, communication is capable without manual setting change by a user.
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