[Notes for telecom value-added business] 9 Technology and Application of Value-added Service Based on Intelligent Network

Author: gnuhpc
Source: http://www.cnblogs.com/gnuhpc/

1. Background:

The Intelligent Network idea originated in the United States in the middle of 1980s.

• The high-tech communication network environment created by the development of science and technology: the exchange and transmission system, the No. 7 signaling system, and the rapid development of the database system support the idea of business processing and switch separation.
• The transformation from the infrastructure of telephone networks to the long-term needs of businesses: the coverage rate of communication networks has increased, and the latter and enterprises have urgent demands for new businesses.
• A competitive environment for telecom operation.

2. Technical System:

Intelligent Network is an additional network structure set up on an existing telecom network to quickly provide various SMART (value-added) services. Intelligent Network is essentially a 'service network '.

The intelligent network uses standard communication interfaces: INAP, cap, and No. 7.

The comparison with the switching network is as follows:

 

 

3. Standard Evolution

 

4. concept model (INCM, intelligent network Conceptual Model)

This reflects the key technologies and working principles of intelligent networks.

 

5. Basic call status model BCSM

BCSM is an abstract model of CCF, which implements bcp sib.

• Call Control Point (PIC-point in CALL): The call control function (CCF) required when the in business logic request completes the Basic Call/connection status.
• Detection point (Dp-detection point): DP is an important part of BCSM. It indicates that transfer control events can occur in basic call and connection processing.
• Transition State and event: Transition State indicates the transition from one PIC to another. An event is the trigger point that causes the transfer between the basic call connection processing state.

6. Network Structure:

7. Example: 800 business signaling processing process

 

8. Development of Intelligent Service in China

 

9. GSM Mobile Intelligent Network ---- camel

GSM phase2 + has begun the integration of the mobile network and intelligent network to provide value-added services to mobile users. Camel is developed based on the CS1 standard of the Fixed Network Intelligent Network. Camel isTo achieve interconnection between the GSM mobile network and the Intelligent NetworkTo provide mobile smart services. Even when a user is roaming out of the ownership location, the user can also provide services in the same region as the owner, provides a mechanism for network operators to provide users with non-standard GSM services. GSM operators can establish an in platform to define and implement new value-added services, instead of standardizing each business, you can build your own unique new business. ETSI's camel (Custom Application of customized application for mobile enhancement Logic Network enhanced logic, custom application of mobile enhancement logic) is a mainstream solution for mobile intelligent networks.

1) Principle:

Basic Idea: upgrade the existing mobile exchange center MSC to a mobile service exchange point so that the call can be reported to the intelligent network; establish Intelligent Network Service Control Points call business users based on business logic establish intelligent network service control points, according to business logic for business users call control, billing and other operations; the mobile service exchange point and Service Control Point exchange information using the INAP protocol.

Call trigger method-special access code trigger: MSC triggers the call to SCP after analyzing the number, similar to the fixed network ssp. user profile trigger: the fixed network SSP can be directly triggered based on the user data in the switch, due to the mobility of mobile network terminals, MSC/vlr does not have user business data and needs to be dynamically obtained from HLR. Therefore, the concept of CSI (camel subscribe information) is introduced.

2) standards:

• GSM 02.78, camel, service definition-Stage 1G: business definition, describing the overall mechanism of business implementation
• GSM 03.78, camel, Stage 2: The second step describes the business implementation mechanism in detail.
• GSM 09.78, camel, camel Application Part (CAP) specification: camel Application Protocol CAP Specification

3) standard content:

• Camel Architecture
• Camel detection site DP camel detection site DP
• Camel custom contract information (CSI)
• Camel basic call status model (BCSM)
• Camel processing process
• Camel Information Flow Definition
• Interaction principles with GSM supplementary services

4) contract information CSI

Camel sub‑information (CSI): HLR/vlr contains camel business-related data added to user data.

• CSI: originating CSI (O-CSI) used by Mo call)
• Mt call using CSI: Terminating CSI (T-CSI)

CSI data content

• Service Key
• SCP address
• Call default Processing
• Rules that trigger business

CSI Data Transmission

• O-CSI and T-CSI in HLR to save their contracted users
• When a user roaming registration, its O-CSI will pass from HLR to the current vlr, And the T-CSI will always be stored in HLR

5) camel2's outbound calling (Mo) Process

Camel business trigger: When a camel business user initiates a call, MSC/SSP queries the user's information; found that there is O-CSI information, in line with the TDP trigger principle, triggering camel call, report the call to gsmscf.

6) camel2's incoming call (MT) Process

7) Camel Evolution

Camel phase1: 1997

New feature entity: gsmscf is added in GSM, and g and G functional entities are added in GSM.

Physical entity changes: added the gsmscp and MSC upgrades to provide the gsmssf function.

Interface Protocol Extension: CAP: gsmscf-gsmssf, which defines seven cap operations, MAP: gsmscf-HLR, HLR-vlr, HLR-gmsc.

Camel phase2: 1998

New feature entity: added the gsmsrf entity

Physical entity changes: new independent IP addresses are added. SCP upgrade supports new cap and map, and MSC upgrade supports new cap and map.

Extended Interface Protocol: CAP: defines 22 cap operations-gsmscf-gsmsrf and gsmscf-MSC. Map: ussd interface between SCF-HLR, and location information query between gsmscf-HLR (ATI ).

Camel phase3:

The combination of CS-L and CS-2 provides more Characteristics Based on CS-L and CS-2, and the reference of CS-1/CS-2 is further strengthened, this is mainly manifested in the support for multi-party call-based operations and SCF call initiation.

The integration with the data network is mainly manifested in the expansion of the intelligent network technology to the GPRS network, the combination of Mobile Intelligent Network and GPRS, to achieve SCP Control of GRPS services, SCP can control operations such as connection and cancellation of GPRS, monitor links, and realize GPRS billing. Camel Phase 3 defines a new CAP operation for this purpose.

SMS support

Ussd support

ETSI added SCE, initiated/accepted ussd operations, and added ussd camel signing information U-CSI.

By introducing ussd to the Mobile Intelligent Network, SCP can interact with ussd mobile users without occupying traffic resources.

Other services include location-based services, supplementary service notifications, and mobile management.

 

Author: gnuhpc
Source: http://www.cnblogs.com/gnuhpc/