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1. 发明申请

US20160087931A1 METHOD AND APPARATUS FOR CALCULATING DISTANCE IN CONTENTS DELIVERY NETWORK 审中-公开
标题翻译：计算内容交付网络距离的方法和装置
公开(公告)号：US20160087931A1
公开(公告)日：2016-03-24
申请号：US14783746
申请日：2014-02-27
申请人： CDNETWORKS CO., LTD.
发明人： Yong-Bae KIM , Seung-Ho RYU , Seok Chan LEE
IPC分类号： H04L29/12 , H04L29/06
CPC分类号： H04L61/1511 , H04L61/2007 , H04L67/42
摘要： Disclosed are a method and an apparatus for calculating a distance in a contents delivery network. According to one preferred embodiment of the present invention, when a domain name resolution request is received from an LDNS, an identifier is added to a domain name requested to be resolved so as to create a CNAMEd domain name response, the CNAMEd domain name response is transmitted to a probe server, the CNAMEd domain name response transmitted to the probe server is transmitted to the LDNS after a source IP address thereof has changed into an address of a name server in the probe server, the name server receives a resolution request to the CNAMEd domain name response from the LDNS, and the name server determines, as a distance between the LDNS and a point of presence (POP), a value obtained by subtracting a distance between the name server and the LDNS and a distance between the name server and the probe server from an interval between a time for transmitting the CNAMEd domain name response from the name server to the probe server and a time for receiving, by the name server, the resolution request to the CNAMEd domain name response from the LDNS. According to the present invention, even when the probe server cannot calculate a distance to the LDNS, a distance between the LDNS and the POP can be calculated, and thus it is possible to improve and stabilize the quality of a contents delivery network service.
摘要翻译：公开了一种用于计算内容传送网络中的距离的方法和装置。根据本发明的一个优选实施例，当从LDNS接收到域名解析请求时，将标识符添加到被请求解析的域名中，以便创建CNAMEd域名响应，CNAMEd域名响应是被传送到探测服务器，传送给探测服务器的CNAMEd域名响应在其源IP地址已改变为探测服务器中的名称服务器的地址后被传送到LDNS，名称服务器接收到解析请求来自LDNS的CNAMEd域名响应，名称服务器将LDNS和存在点（POP）之间的距离确定为通过减去名称服务器与LDNS之间的距离和名称服务器之间的距离而获得的值以及从名称服务器向探测服务器发送CNAMEd域名响应的时间间隔的探测服务器，以及由名称服务器接收r的时间对LDNS的CNAMEd域名响应进行解析请求。根据本发明，即使在探测服务器不能算出与LDNS的距离的情况下，也能够计算LDNS与POP之间的距离，能够提高和稳定内容发送网络服务的质量。

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