(EN) The invention discloses method and device for continuing call in the call control of an application server and belongs to the field of communication. The method comprises the steps: the application server sends an Offer message to a second party after medium negotiation with a first party; the application server receives an Answer message transmitted by the second party, and sends an Offer message converted from the Answer message to the first part, wherein the Offer message carries a confirm request for a Precondition state of the first party; the application server receives an Answer message transmitted by the first party, wherein the Answer message carries a conform response of the first party to the Precondition state; the application server judges whether the Answer message meets conversion conditions of the Answer message or not; and if the Answer message meets conversion conditions of the Answer message, the application server converts the Answer message to the Offer message and sends to the second party. The technical scheme of the invention enables the call to continue, and is beneficial to the development of third-party call control services.
(ZH)
本发明公开了一种应用服务器呼叫控制中呼叫继续的方法和装置，属于通信领域。该方法包括：应用服务器在与第一方进行媒体协商后，向第二方发送提供Offer消息；应用服务器接收第二方发送的应答Answer消息，将Answer消息转换成Offer消息后向第一方发送，该Offer消息携带对第一方前提条件Precondition状态的确认请求；应用服务器接收第一方发送的Answer消息，该Answer消息携带第一方对Precondition状态的确认响应；应用服务器判断Answer消息是否满足Answer消息的转换条件；如果满足，应用服务器将Answer消息转换成Offer消息后向第二方发送。本发明的技术方案可以使呼叫继续，有利于第三方呼叫控制业务的发展。
