在RFC 3262中，开发了一项机制来确保可靠地发送消息，且仅为确认目的而发送，以便在使用udp之类的传输协议时不会丢失呼叫状态。
In RFC 3262, a mechanism was developed to ensure that the responses are sent reliably and acknowledged alone so that the status of the call is not lost if the transport protocol is something like UDP.
给出了呼叫损失概率、分组丢失率的计算方法及容量缩放因子的求解方法。
Methods of evaluating the call blocking probabilities, cell loss probability and the capacity scaling factor were presented.
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