公开(公告)号：US08811151B2

公开(公告)日：2014-08-19

申请号：US13908611

申请日：2013-06-03

Applicant: AT&T Intellectual Property I, L.P.

Inventor： Chaoxin Qiu ,  Robert Dailey ,  Arshad Khan ,  Jeffrey Scruggs

IPC: H04L1/22 ,  H04J1/16 ,  H04J3/14 ,  H04L29/06

CPC classification number: H04L65/1046 ,  H04L1/22

Abstract: According to one method for preserving stable calls during failover, during a dialog between two user endpoints, a determination is made whether a standby call processor has become operational, such as when a corresponding primary call processor is in fault. Responsive to determining that the standby call processor has become operational, a signaling protocol message is received from a requester. A determination is made whether the message includes an in-dialog signaling protocol request. Responsive to determining that the message includes the in-dialog request, a determination is made whether a call state associated with the dialog is found in memory. Responsive to determining that the call state associated with the dialog is not found in memory, a non-call terminating error response is made responding to the in-dialog request. The non-call terminating error response may cause the requester to terminate the in-dialog request but not terminate the dialog.

Abstract translation: 根据用于在故障切换期间保持稳定呼叫的一种方法，在两个用户端点之间的对话期间，确定备用呼叫处理器是否变得可操作，例如当相应的主呼叫处理器处于故障时。 响应于确定备用呼叫处理器已经可操作，从请求者接收到信令协议消息。 确定消息是否包括对话信令协议请求。 响应于确定消息包括对话请求，确定是否在存储器中找到与对话相关联的呼叫状态。 响应于确定与存储器中没有找到与对话相关联的呼叫状态，响应对话请求而产生非呼叫终止错误响应。 非呼叫终止错误响应可能导致请求者终止对话请求，但不终止该对话。

公开(公告)号：US20130258836A1

公开(公告)日：2013-10-03

申请号：US13908611

申请日：2013-06-03

Applicant: AT&T Intellectual Property I, L.P.

Inventor： Chaoxin Qiu ,  Robert Dailey ,  Arshad Khan ,  Jeffrey Scruggs

IPC: H04L29/06

CPC classification number: H04L65/1046 ,  H04L1/22

Abstract: According to one method for preserving stable calls during failover, during a dialog between two user endpoints, a determination is made whether a standby call processor has become operational, such as when a corresponding primary call processor is in fault. Responsive to determining that the standby call processor has become operational, a signaling protocol message is received from a requester. A determination is made whether the message includes an in-dialog signaling protocol request. Responsive to determining that the message includes the in-dialog request, a determination is made whether a call state associated with the dialog is found in memory. Responsive to determining that the call state associated with the dialog is not found in memory, a non-call terminating error response is made responding to the in-dialog request. The non-call terminating error response may cause the requester to terminate the in-dialog request but not terminate the dialog.

Abstract translation: 根据用于在故障切换期间保持稳定呼叫的一种方法，在两个用户端点之间的对话期间，确定备用呼叫处理器是否变得可操作，例如当相应的主呼叫处理器处于故障状态时。 响应于确定备用呼叫处理器已经可操作，从请求者接收到信令协议消息。 确定消息是否包括对话信令协议请求。 响应于确定消息包括对话请求，确定是否在存储器中找到与对话相关联的呼叫状态。 响应于确定与存储器中没有找到与对话相关联的呼叫状态，响应对话请求而产生非呼叫终止错误响应。 非呼叫终止错误响应可能导致请求者终止对话请求，但不终止该对话。