Secretarial knowledge > Graduation design

Inter-network communication of smart network services

[Abstract] This paper analyzes the importance of realizing the inter-network communication of smart network services to the survival and development of services, and the preconditions for realizing the inter-network communication of smart network services. The way to realize the interoperability between smart network service networks has been discussed in detail. [Keywords] Inter-network communication between smart network services is called centralized payment service. 1. Introduction With the emergence of several telecom operators such as China Telecom, China Unicom and Jitong, the competition situation in China's telecom market has gradually formed. . The competition of multi-operators makes the majority of telecom users benefit in terms of price and service quality. However, if the interoperability of smart network services between operators is not solved in a timely and scientific manner, users will only be able to operate in the networks of operators. Use the smart network services provided by the respective scope. Due to the nature of the business itself, the smart network business requires different scopes. For example, services such as public calling and electronic voting are generally open in the local area or in the province, while the billing card calling service and the called centralized payment service are open in the country or even abroad. For a service such as a billing card call that requires a wider range of services, the inter-network communication of the smart network service is realized, that is, an intelligent network service opened by the operator, and the user can also be in the network of other operators. Use is very important for the survival and development of the business. On the other hand, on the one hand, it can not meet the needs of users to conveniently use the business anywhere, and on the other hand, it is limited to a certain range of open smart network services, which is also unattractive to users and is not conducive to business promotion. 2. Prerequisites for realizing inter-network communication between smart network services Smart network is a network system that can provide new services quickly, economically and flexibly. Opens complementary services on smart networks, and its advantages are not only in services but also in users. The management of data and the control of business logic are relatively concentrated, and also the user can use the service in a large range. The user can connect to the service control point SCP for the open intelligent network service through any No.7 signaling network. Local, the use of smart network services, it is this latter advantage to provide a technical basis for the inter-network communication of smart network services. One of the prerequisites for the inter-network communication function of the intelligent network service is to realize the interworking of the inter-network signaling functions. In addition, in the smart network service interworking between networks, the caller and the called party of the service call are respectively located in two different networks, and if the two networks that communicate with each other have no problem with each other, In the same way, it is impossible to realize the service interworking of the smart network, so the second prerequisite is to realize the intercommunication between the basic call control functions of the network. All the following discussion on the interworking mode will be established under these two preconditions. The principles for the two networks to implement voice and signaling network interworking should not be discussed here, but if they are in compliance with the relevant regulations, this article will only From the technical point of view, several possibilities for realizing interoperability between smart network service networks are discussed. 3. Ways to achieve inter-network communication between smart network services Inter-network communication refers to the process of providing a service by several networks, including the interworking of smart networks and smart networks, smart networks and non-intelligent networks. Interworking of the type network. In Recommendation Q.1201, ITU has summarized the inter-network interworking at the service processing level into two cases: Two IN-structured network cooperation provides a smart network service, as shown in Figure 1: IN- SL IN service logic BCP basic call processing GW gateway Figure 1 Inter-network communication on the service processing level In Figure 1, GW1 is used to connect calls between two networks, and GW2 is used to access service logic in other networks. GW3 is used to communicate between the business logics held by different networks. The network of the IN structure cooperates with the network of the non-IN structure to provide a smart network service, as shown in Figure 2: IN-SL IN service logic BCP basic call processing GW gateway Figure 2 Inter-network communication at the service processing level In Figure 2, the function of GW4 is to connect calls between the network of the IN structure and the network of the non-IN structure, and provide interworking between the BCPs of the two networks. The above two cases are integrated, and the two interworking are not considered. The access type of the network and the level of the intelligent structure, combined with the actual situation of the smart network construction in China, the inter-network interworking mode of the smart network service can be summarized into three ways. For the sake of discussion, it is first assumed that there is an example of the need for IN service interworking: Network 1 is managed by operator A, which uses the service control point SCP1 to open the called centralized payment service, and network 2 is managed by operator B. User A And User B is the user of Network 1, and User C and User D are the users of Network 2. In the following, we will discuss the three ways in which the users of the network 2 use the called party centralized payment service opened by the operator A on the SCP1, that is, the three-way communication between the network 1 and the network 2 is realized. Method 1: Accessing the SCP of the other party through the SSP of the other party's network Figure 3 Accessing the SCP of the other party through the SSP of the other party's network As shown in Figure 3, in this smart network service interworking mode, the user C of the network 2 dials When the called party centralizes the paid service subscriber number registered in the network 1, the called party number and the calling number are transmitted by the end office of the network 2 to the gateway GW2 of the network 2, and transmitted to the network via the gateway GW1 of the network 1. After the service switching point SSP1 of the network 1, the SSP1 of the network 1 interacts with the SCP1 of the network 1, the SSP1 obtains the real called number sent by the SCP1, and connects the call to the called user B. If the user needs to send a voice prompt during the service execution or the system needs to collect the password information input by the user, the smart peripheral IP1 in the network 1 is required to assist. The first mode is characterized in that, during the processing of the entire IN call, the processing related to the smart network service is completely completed by the network 1, and for the network 2, it is the same as the ordinary call to the network 1. Changes in business characteristics have no effect on Network 2. Even if the network 2 is a non-IN network, the smart network service can be interconnected in this way. However, the service switching point in network 1 that is responsible for the tandem connection between the local network and the external network IN call needs to have a large processing capability. In the call processing, since the SSP1 must be connected to the primary and the called by the network 1, there may be an unreasonable routing organization. Method 2: directly accessing the SCP network of the other party through the SSP of the network. The service control point SCP1 for opening the smart network service can be accessed by the service switching point SSP2 of the network 2 with which the service is interworking, as shown in FIG. Show: Figure 4 When the user C who directly accesses the SCP network 2 of the other party through the SSP of the network dials the called centralized payment service user number registered on the network 1, the end office of the network 2 will call the called number and the main The number is transmitted to the service switching point SSP2 of the network 2, and the SSP2 interacts directly with the service control point SCP1 of the network 1 through the No. 7 signaling network, and the SSP2 obtains the real called number sent by the SCP1. The user B is located on the network 1, and the SSP2 needs to connect the user C with the B according to the routing organization principle that the network 1 and the network 2 are interconnected. If you need to send a voice prompt to the user during the service execution process or the system needs to collect the password information input by the user, you need the intelligent peripheral IP2 in the network 2 to assist. The second mode is characterized in that the service switching point SSP2 of the network 2 directly interacts with the service control point SCP1 of the network 1, and the SSP2 can directly select the best path after obtaining the real called number, and the main and the called are connected. through. As long as the service switching point is properly set in the network 2, and the routing organization scheme of the two network voice channels is reasonable, there will be no unreasonable routing organization in the call connection. The IN call is handled directly by the service switching point of the network 2 and the intelligent peripheral, which relieves the pressure on the corresponding device in the network 1. The disadvantage of this method is that the interface between the service control point of the network 1 and the service switching point of the network 2 needs to be unified; part of the service data needs to be set in the network 2, for example, the service trigger data needs to be in the network 2 service. Set in the exchange point, the recording notification data of the service needs to be configured in the smart peripheral of the network 2, and once the data is changed, such as: the recording notification is changed, the network 1 needs to notify the network 2, and the changed data. Provide it to Network 2 to assist it in reloading. In this interworking mode, the operators of the network 1 and the network 2 need to cooperate with each other, and the two are more closely coupled in the business opening process. Since the service switching point of the network 2 can directly access the service control point of the network 1, there is no corresponding mechanism in the INAP procedure to ensure the security of the communication between the SCP and the SSP, which may be safe for the business user data. Sex constitutes a threat. Since multiple service switching points in the network 2 can directly access the service control point of the network 1, the logical signaling relationship of the network 1 service control point becomes very complicated. Method 3: Accessing between different operators' SCPs In order to implement this service interworking mode, different service logics need to be configured in SCP1 and SCP2 respectively. The service logic configured in SCP1 consists of two parts: a. for handling service calls from the local network; b. for handling calls to other services of the other network interworking with the local network. Configure the service logic in SCP2. c. It is used to handle the calls of users on the local network that are open to other networks that communicate with the local network. This part of the business logic does not involve the specific characteristics of the service. In network 2, when SCP2 receives a service request for a called central payment service user registered in SCP1, logic c in SCP2 is activated, controlling SCP2 to interact with SCP1, and SCP1 is calling under the control of logic b. Process it. The SCP2 receives the instruction from the SCP1 and completes the corresponding instruction together with the SSP2 in the network to provide the user with the inter-network communication called the centralized payment service. FIG. 5 is a schematic diagram of the interaction between each part of the business logic in an inter-network communication called a centralized payment service. The relay mode of this interworking mode is shown in Figure 6. Figure 5 Inter-network communication is called the interaction between each part of the service logic in the centralized payment service. Figure 6 The user C of the network 2 dials the called centralized payment service user registered on the network 1 by means of different operator SCP access. When the number is used, the called number and calling number of the network 2 are transmitted to the service switching point SSP2 of the network 2, and the SSP2 interacts with the SCP2 through the No. 7 signaling network, and there is a support and other in SCP2. The business control point interacts with the simple business logic of accepting instructions from other service control points. The business logic is independent of the specific characteristics of the called centralized payment service. Under the control of the business logic, the SCP is applied through the smart network. The interface procedure with the SCP, SCP2 transmits the called number and the calling number to SCP1, receives the information transmitted by SCP2, and SCP1 finds the corresponding business logic, which contains all the service characteristics of the called centralized payment service. It also supports the processing of business calls from the external network, executes business logic, and returns the translated real number to SCP2. After receiving the actual called number, SCP2 passes it to SSP2 and commands SSP2 to complete the connection to the called party. After the SSP2 receives the called number, since the called user B is located on the network 1, the SSP2 needs to connect the user C with the user B according to the routing organization principle that the network 1 and the network 2 are interconnected. If the voice prompt is sent to the user during the execution of the service or the system needs to collect the password information input by the user, SCP1 is instructed by SCP1 to be completed with the assistance of the intelligent peripheral IP2 in the network 2. In the process of SCP1 executing business logic, if it is necessary to monitor the connection status or need to end the call, SCP2 is notified by instruction, which is assisted by SCP2, and when the connection is normal, the end of the call is transmitted to SCP1 by SCP2. The third mode is characterized by the fact that the SCP interworking between the two networks has a corresponding mechanism in the CS-2 INAP procedure to ensure the security of communication between the SCP and the SCP. Therefore, such an inter-network access method is relatively secure. Since only the service control point of the network 2 can directly access the service control point of the network 1, the logical signaling relationship of the service control point in the network 1 is simplified. Different INAP procedures can be used between the SSP and the SCP of the two networks. The disadvantage of this method is that a part of service data needs to be configured in the network 2, including: configuring corresponding service trigger data in the service switching point of the network 2, and configuring the service in the smart peripheral or service switching point of the network 2. Recording notification data, etc. If the recording notifications of the two networks are inconsistent, SCP2 also needs to have the recording notification flag conversion function. The service control points in the two networks need to support the agreement information between the SCF-SCFs specified by the CS-2 INAP, and the unified SCF-SCF procedure is adopted; the processing capability of the two SCPs needs to be occupied simultaneously in one call. 4. Conclusions The above three ways to realize the interoperability of smart network services are discussed. They have their own characteristics. Different network conditions and different service features have different requirements for interworking. When implementing service interworking, different interworking methods should be selected according to actual conditions. It should be pointed out that the three methods discussed above do not include the situation in which smart network services are interoperable between different countries. At present, China's called centralized payment service and billing card calling service can be used in other countries. The service interworking method adopted is: the SSPs of the two networks access their respective SCPs, and after initial translation by the SCP of this network, they pass The SSP of this network accesses the SSP of the other network. Since this interworking method is only used for interworking between IN services internationally, it will not be described in detail here. With the continuous development of the world economy and culture, the new smart network business will continue to be generated under the market drive. At the same time, the rapid development of smart network technology will continue to improve its application procedures and enhance its functions. I believe it is here. In addition to the three interoperability methods discussed, there will be many other ways to wait for us to explore.

recommended article

popular articles