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IP Multi-media Subsystem
Overview

IMS (IP Multimedia Subsystem) is a new structure of telecom network that has been widely accepted. It provides better design and ability for supporting multimedia applications, FMC, ICT, full-service operation and so on. Base on Huawei IMS solution, operators can easily provide more exciting services to individual, enterprise, community and explore the blue ocean in the future.

 

 

Call Session Control Function  
,Huawei Call Session Control Function (CSC3300), is the call control session of Huawei's IMS solution. It provides functions such as IMS user network authentication, session control, roaming mobility management and Quality of Service (QoS) control of the IMS bearer plane.
Home Subscriber Server  
Huawei Home Subscriber Server, the HSS9820, integrates the functions of HSS and SLF of IMS. And it is the core database to store the subscriber information in the IMS subscriber home network.
Voice Call Continuity Application Server  
The VCC is a service of fixed and mobile integration defined in the 3GPP standard.
Telephony Application Server  
The ATS9900 is the SIP AS to carry out telecom services and provide basic voice services, supplementary services and IP Centrex services.
Policy Decision Function  
The RM9000 is the large capacity resource management device of Huawei. It satisfies all requirements of 3GPP R6/3GPP R7/TISPAN for the PDF/PCRF/SPDF/A-RACF.
Network Attachment Subsystem  
The IMS network realizes the integration of mobile and fixed networks. Huawei utilizes the ETSI TISPAN Network Attachment Subsystem (NASS) architecture for the fixed network subscribers to access the IMS network. The AIM6300 realizes the function of NACF and CLF in NASS architecture.
Media Resource Server  
The Huawei Media Resource Controller (MRC6600) realizes the function of MRFC network element in the IMS network. The Media Resources Processor (MRP6600) realizes the function of MRFP network element. The product combing these two is called the MRS6600. The MRFC works together with the MRFP to realize the mechanism of separating the media resources control from the bearer, which can meet the need of media functions, such as audio conference, video conference, voice mailbox, video mailbox, multimedia ring back tone/picture and PoC.
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