公开(公告)号：US20160308915A1

公开(公告)日：2016-10-20

申请号：US14691253

申请日：2015-04-20

Applicant: Avaya Inc.

Inventor： Mehmet C. Balasaygun ,  Gordon R. Brunson ,  Joel M. Ezell ,  Eric D. Cooper ,  Rifaat Shekh-Yusef

IPC: H04L29/06

CPC classification number: H04L65/1006 ,  H04L65/1069 ,  H04L65/1096

Abstract: A communication device sends a Session Initiation Protocol (SIP) INVITE message to establish a call. In response, the call is forked. For example, in parallel forking, the SIP INVITE may be sent to two different communication devices. The forking causes each communication device to send at least one provisional response message. In this case, first and second SIP provisional response messages are received that include Session Description Protocol (SDP) information for a media stream. A first media stream associated with one of the first or second SIP provisional response messages is received and played. A second media stream associated with the other one of the first or second SIP provisional response messages is received within a first time period. In response to receiving the second media stream within the first time period, the first media stream is discarded and the second media stream is played.

Abstract translation: 通信设备发送会话发起协议（SIP）INVITE消息以建立呼叫。 作为回应，呼叫被分叉。 例如，在并行分支中，SIP INVITE可以被发送到两个不同的通信设备。 分叉使每个通信设备发送至少一个临时响应消息。 在这种情况下，接收包括媒体流的会话描述协议（SDP）信息的第一和第二SIP临时响应消息。 与第一或第二SIP临时响应消息之一相关联的第一媒体流被接收和播放。 与第一或第二SIP临时响应消息中的另一个相关联的第二媒体流在第一时间段内被接收。 响应于在第一时间段内接收到第二媒体流，丢弃第一媒体流并播放第二媒体流。

公开(公告)号：US10931719B2

公开(公告)日：2021-02-23

申请号：US14691253

申请日：2015-04-20

Applicant: Avaya Inc.

Inventor： Mehmet C. Balasaygun ,  Gordon R. Brunson ,  Joel M. Ezell ,  Eric D. Cooper ,  Rifaat Shekh-Yusef

IPC: H04L29/06

Abstract: A communication device sends a Session Initiation Protocol (SIP) INVITE message to establish a call. In response, the call is forked. For example, in parallel forking, the SIP INVITE may be sent to two different communication devices. The forking causes each communication device to send at least one provisional response message. In this case, first and second SIP provisional response messages are received that include Session Description Protocol (SDP) information for a media stream. A first media stream associated with one of the first or second SIP provisional response messages is received and played. A second media stream associated with the other one of the first or second SIP provisional response messages is received within a first time period. In response to receiving the second media stream within the first time period, the first media stream is discarded and the second media stream is played.