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    • 46. 发明授权
    • Preserving stable calls during failover
    • 在故障切换期间保持稳定的呼叫
    • US07843809B2
    • 2010-11-30
    • US12271251
    • 2008-11-14
    • Chaoxin QiuRobert DaileyArshad KhanJeffrey Scruggs
    • Chaoxin QiuRobert DaileyArshad KhanJeffrey Scruggs
    • G01R31/08G06F11/00G08C15/00H04J1/16
    • H04L65/1046H04L1/22
    • 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.
    • 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。