公开(公告)号：US09391889B1

公开(公告)日：2016-07-12

申请号：US13970187

申请日：2013-08-19

Applicant: Sprint Spectrum L.P.

Inventor： Nicolas A. Nehme Antoun ,  Pierce Gorman ,  Saravana Velusamy

IPC: H04L1/00 ,  H04L12/741

CPC classification number: H04L45/74

Abstract: Example methods and systems for requesting information from the Internet Domain Name System (DNS) based on a destination and one or more codecs of a source specified within a computer-readable invitation to establish a communication session are described. A source gateway or a user agent device can generate the invitation. A DNS record associated with the destination can specify codecs used by the destination or a gateway the destination uses to carry out communication sessions. A proxy server that received the invitation and the DNS record can select a gateway that uses a codec that matches a codec used and preferred by a gateway. The proxy server can forward the codec to selected gateway, in particular, to an IP address and port associated with the selected gateway, for notifying the destinations of the requested communication session. The invitations can comprise SIP INVITE messages.

Abstract translation: 描述了用于从基于目的地的因特网请求信息的信息的示例方法和系统，以及用于建立通信会话的计算机可读邀请中指定的源的一个或多个编解码器。 源网关或用户代理设备可以生成邀请。 与目的地相关联的DNS记录可以指定目的地或目的地用于执行通信会话的网关使用的编解码器。 接收到邀请和DNS记录的代理服务器可以选择使用与网关使用和优选的编解码器相匹配的编解码器的网关。 代理服务器可以将编解码器转发到所选择的网关，特别是转发到与所选网关相关联的IP地址和端口，以通知所请求的通信会话的目的地。 邀请可以包括SIP INVITE消息。