call support layer 中文意思是什麼
call support layer
解釋
調用支持層-
The ip multimedia subsystem introduced by 3gpp ’ s r5 specification take sip as the only session control protocol covered the user access, call control and service logic execute layer. accordingly, sip has been developed to support correspondent capabilities
3gpp在r5版本中提出的ip多媒體子系統將sip作為唯一的會話控制協議, sip跨越了ims網路的接入、控制、業務三個層次,相應地sip要具備接入控制、會話控制、業務生成三個層次的能力。
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