A Detailed Description Of Soft
With the rapid development of communication network technology
, people and business demand for broadband is growing rapidly, in order to provide users with more flexible, diverse existing business and new business, providing users a more personalized service, put forward the concept of next generation network, and currently the major telecom operators have started to test next-generation communications networks. Soft-switching technology is the next generation communications network solutions, the focus of one of the industry has become a hot topic in recent years. Network and exchange standards, our research group has completed the soft switch system in the framework of the general technical requirements, 863 are on the soft switch system in the multimedia and mobile communications systems research topics were project.
1 softswitch concept and definitions proposed
Softswitch concept originated in the United States. At that time the enterprise network environment, Ethernet-based telephone users through a set of PC-based call control server software (CallManager, CallServer), to achieve PBX capabilities (IPPBX). For such a device, the system installed without a separate network, but only can be achieved through shared local area network management and maintenance of the unified, integrated cost far lower than traditional PBX. As the enterprise network environment, the reliability of equipment, billing and management do not ask, mainly to meet the communication needs, equipment, low threshold, many equipment manufacturers can provide such solutions, it was a great success IPPBX applications. Inspired by the IPPBX successful, integrated operations to improve network efficiency, network development, become more rational, open, better service to the user. Industry made such a thought: the traditional components of switching equipment, is divided into call control and media processing, using standard protocols between the two (MGCP, H248) and mainly deal with the use of pure software, so, SoftSwitch (Softswitch ) technology emerged.
Softswitch concept was put forth, and soon received broad industry recognition and attention, ISC (InternationalSoftSwitchConsortium) the establishment of a more accelerated pace of development of soft switch technology, soft switch-related standards and protocols are the IETF, ITU-T such as the International Organization for Standardization attention.
According to the definition of ISC International Softswitch Forum, Softswitch is based on the sub-network call control using programmable software functions and separation of media processing devices and systems. Therefore, the basic meaning of softswitch call control function is to from the media gateway (transport layer) separated by the basic call control software functions, enabling call transfer and call control of the separation, for the control, switching and software programmable feature to create separate plane. Mainly provides connection control softswitch, translation and routing, gateway management, call control, bandwidth management, signaling, security, and call detail recording functions. At the same time, soft-switching will also network resources, network capacity to package up the business via standard open interfaces and business application layer connected to the network can be quickly and easily offer new services.
2 softswitch technology-based network structure Softswitch is one of the next generation network equipment, the operators in the formation of a network based on softswitch technology structure, must take into account a variety of network interoperability with other. In the next-generation networks, should have a more unified network system. Soft-switching in the network control layer, better achieved using programmable software-based packet networks to provide call control functions and media processing capabilities of separating.
Softswitch and application / service layer to provide access to the interface between the various databases, three-application platform, functional server, the interface to realize the value-added services, management services and the support of three applications. Of which: softswitch and application server can use the interface between the SIP, API, such as Parlay, provides three applications and value-added services support; soft switch and the interface between policy server work on the network equipment dynamic intervention, can be used COPS protocol; soft-switching center and the gateway interface between the network management, using SNMP; soft-switching and intelligent network SCP interface between the intelligent network services on the existing support, using INAP protocol.
A Detailed Description Of Soft
By: hotxueboy
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