English name: core network English name: core network Definition: A network that connects a service provider with an access network or connects an access network with other access networks. Usually refers to the part of the network other than the access network and the subscriber premises network. Discipline: communication technology (first-class discipline); Communication Network (two disciplines) This content is approved and published by the National Committee for the Examination and Approval of Scientific and Technical Terminology.
Simply put, mobile network can be divided into three parts: base station subsystem, network subsystem, security management and other system support parts. The core network is located in the network subsystem, and its main function is to connect the call request or data request from port A to different networks. It mainly involves call connection, billing, mobility management, supplementary service realization, intelligent triggering and so on. The main body is supported by the switch. For softswitch, there are two obvious concepts, the separation of control and bearer, and the separation of control channel and data channel. According to the protocol, the stem core network is a network element with the function of switching to the core or call routing, which is generally the case for the 2G/3G core network. In R4 architecture, such as MSC servers in MGW, HLR, VLR, EIR, AUC and other places. Its main function is the whole call signaling control and bearer establishment. The development direction of core network Core network has entered the "IP" era in an all-round way, with IP, integration, broadband, intelligence, disaster tolerance and environmental protection as its main features. From the perspective of circuit domain, mobile softswitch has been fully transformed from TDM transmission circuit to IP; From the perspective of packet domain, broadband and intelligence are its main characteristics; According to the user data, the new HLR is widely accepted and gradually evolves to the future converged data center. In addition, operators have put disaster tolerance and green environmental protection at a strategic height; The future development and evolution of mobile network will achieve the same goal. In the 4G era, the two camps of GSM and CDMA will move towards the same IMS+SAE+LTE architecture.
Question 2: What does the core network do? Simply put, mobile network can be divided into three parts: base station subsystem, network subsystem, security management and other system support parts. The core network is located in the network subsystem, and its main function is to connect the call request or data request from port A to different networks. It mainly involves call connection, billing, mobility management, supplementary service implementation, intelligent triggering and so on. The main body is supported by the switch. For softswitch, there are two obvious concepts, the separation of control and bearer, and the separation of control channel and data channel. According to the protocol, the core network is a network element with the function of switching to the core or calling routing, which is generally the case with the 2G/3G core network. In R4 architecture, such as MSC servers in MGW, HLR, VLR, EIR, AUC and other places. Its main function is the whole call signaling control and bearer establishment. 1. Beijing Yitong Huarui Technology Co., Ltd. is a high-tech enterprise specializing in the construction and optimization of wireless network engineering in communication field, especially in mobile communication field, involving all fields of communication service industry. Long-term commitment to mobile communication network engineering construction and network maintenance optimization, aiming at providing high-tech content, high added value and high satisfaction network services for mobile communication operators, equipment vendors and service providers. Founded in June 2006 at 5438+ 10, the company is a holding subsidiary of Guangzhou Yitong Technology. The company's business covers equipment debugging, system integration, network planning, network optimization, system testing, network maintenance, equipment installation, communication equipment and many other aspects. The service footprint covers all parts of China and Southeast Asia, and it has extensive business cooperation with many domestic operators, and has close technical cooperation with many domestic and foreign equipment vendors and operators such as Ericsson, Huawei, China Mobile and China Unicom. The company's products and solutions cover mobile (HSDPA/WCDMA/EDGE/GPRS/GSM, CDMA 20001XEV-DO/CDMA 20001X, TD-SCDMA and WiMAX), core network (IMS, mobile soft switching, NGN) and telecom value-added services (IN, mobile data service, WiMAX). The company's marketing and service network covers many provinces in China, Hong Kong, Macao and Taiwan, and has more than 200 professional and technical personnel, of whom more than 95% are engaged in technical work. The technical backbone is the backbone of China Telecom's Guangdong communication network technical support. It has accumulated rich communication network knowledge and experience and formed a unique "engineer culture" in the industry, which can provide customers with efficient and high-quality services. In the process of continuous growth, Beijing Yitong Huarui Technology Co., Ltd. has carried out a series of management changes and gradually integrated with the international community. We have made profound changes in product development, supply chain management, technical services, marketing, human resource management, financial management and quality control, introduced industry best practices, and established an IT-based management system. The company pays attention to the construction of corporate culture and the cultivation and development of talent echelon, and has established a scientific talent management system. The company takes "a century-long plan, talent-oriented" as the company's human resources concept, accepts all kinds of outstanding talents needed by enterprises, and tries its best to create a harmonious, inspiring and full of * * * working environment and living environment. The company pursues the growth of enterprises and employees, and is committed to the perfect combination of personal achievements and enterprise progress. We believe that outstanding talents will find their own position in Beijing Yitong Huarui Technology Co., Ltd. and experience the infinite achievements of career development. Beijing Yitong Huarui Technology Co., Ltd. is a dynamic team. We look forward to providing you with a big stage to fully display your talents and realize your self-worth. Welcome to join us! Second, the company's corporate culture Beijing Yitong Huarui Technology Co., Ltd. is eager to become a world-famous enterprise and strive for it. Vision: To become a global excellent information technology service and product provider. Short-term strategic goal (3 years): to become a well-known mobile communication technology service and product provider in China ... >>.
Question 3: What is the technical term definition of core network?
English name: core network English name: core network Definition: A network that connects a service provider with an access network or connects an access network with other access networks. Usually refers to the part of the network other than the access network and the subscriber premises network. Discipline: communication technology (first-class discipline); Communication Network (two disciplines) This content is approved and published by the National Committee for the Examination and Approval of Scientific and Technical Terminology.
Simply put, mobile network can be divided into three parts: base station subsystem, network subsystem, security management and other system support parts. The core network is located in the network subsystem, and its main function is to connect the call request or data request from port A to different networks. It mainly involves call connection, billing, mobility management, supplementary service implementation, intelligent triggering and so on. The main body is supported by the switch. For softswitch, there are two obvious concepts, the separation of control and bearer, and the separation of control channel and data channel. According to the protocol, the core network is a network element with the function of switching to the core or calling routing, which is generally the case with the 2G/3G core network. In R4 architecture, such as MSC servers in MGW, HLR, VLR, EIR, AUC and other places. Its main function is the whole call signaling control and bearer establishment. The development direction of core network Core network has entered the "IP" era in an all-round way, with IP, integration, broadband, intelligence, disaster tolerance and environmental protection as its main features. From the perspective of circuit domain, mobile softswitch has been fully transformed from TDM transmission circuit to IP; From the perspective of packet domain, broadband and intelligence are its main characteristics; According to the user data, the new HLR is widely accepted and gradually evolves to the future converged data center. In addition, operators have put disaster tolerance and green environmental protection at a strategic height; The future development and evolution of mobile network will achieve the same goal. In the 4G era, the two camps of GSM and CDMA will move towards the same IMS+SAE+LTE architecture.
Question 4: What is the core network? The answer "backbone network is also called core network" is completely wrong.
Backbone network is the concept of bearer network, and core network (CN) is the concept of mobile communication network.
The mobile communication system is mainly composed of three parts: switching network subsystem (NSS), radio base station subsystem (BSS) and mobile station (MS), in which NSS method is the concept of core network.
Find a book about GSM network or WCDMA network structure, and you can learn more about it after reading it.
Hehe, typing is so slow
Question 5: What does Huawei's core network do? Mainly provide core network equipment. Huawei itself is an equipment manufacturer and does not build its own core network. The core network is built by network operators, such as China Unicom and Telecom.
Question 6: What is the CE of the core network? What's the specific use? CE (Customer Edge), customer edge devices and customer routers connected by service providers. CE routers provide service access for users by connecting one or more PE routers. A CE router is usually an IP router, which establishes an adjacency relationship with the connected PE/AR router. 2. Background of using CE router With the development of IP of mobile network, 2G/3G mobile network elements and service systems need to access high-quality IP bearer networks to meet the requirements of voice and data services for QoS, security and reliability. However, the direct access of mobile core network elements and business systems to IP bearer backbone networks will lead to many problems, such as excessive port pressure of backbone routers and frequent port expansion, which will affect the stability of the whole network; In addition, the subsequent network maintenance interface is not clear, which leads to complex management problems. The accepted practice in the industry is to integrate the core network business system by adding a first-class router, and then access the IP bearer backbone network and enter the corresponding VPN. Therefore, this router also inherits the name of the customer edge router defined in RFC 4364 (BGP/MPLS IP Virtual Private Network), which is called CE router for short. 3. What is the function of 3.CE router? CE router connects the mobile core network elements and business systems to realize isolation from the IP bearer network and reduce the coupling between them. At the same time, the management domain and service domain are also effectively distinguished, and the IP bearer network equipment and ce equipment are managed separately, which makes the maintenance interface clearer. With the rapid development of business, the adjustment of mobile network is inevitable. By changing the setting of CE router, the deployment, expansion and link adjustment of mobile network services can be completed on CE router, which effectively reduces the impact on IP bearer backbone network and improves scalability. From the point of view of traffic, CE router should also dredge a large number of local services in mobile soft switch to improve network performance and efficiency.
Question 7: The development direction of the core network The core network has entered the "IP" era in an all-round way, and its main characteristics are IP, integration, broadband, intelligence, disaster tolerance and environmental protection. From the perspective of circuit domain, mobile softswitch has been fully transformed from TDM transmission circuit to IP; From the perspective of packet domain, broadband and intelligence are its main characteristics; According to the user data, the new HLR is widely accepted and gradually evolves to the future converged data center. In addition, operators have put disaster tolerance and green environmental protection at a strategic height; The future development and evolution of mobile network will achieve the same goal. In the 4G era, the two camps of GSM and CDMA will move towards the same IMS+SAE+LTE architecture. The function of the core network is mainly to provide user connection, user management and service bearing, because the bearing network provides the interface to the external network. The establishment of user connection includes functions such as mobility management (MM), call management (CM), switching/routing, and recording notification (connecting intelligent network services to intelligent network peripherals). User management includes user description, Qos (including description of user service Qos), user communication record (billing), VHE (virtual home environment provided by dialogue with intelligent network platform) and security (corresponding security measures provided by authentication center include security management of mobile service and security handling of external network access). Access to the core network includes external PSTN, external circuit data network and packet data network, Internet and intranet, and mobile own SMS server. The basic services that can be provided include mobile office, e-commerce, communication, entertainment services, travel and location-based services, telemetry-simple message services (monitoring and control) and so on. Core network is divided into circuit-switched domain and packet-switched domain. The functional components required by CS domain include TRAU, MSC, etc. Functional components needed in PS domain include GGSN, SGSN and other registers and servers. It is stipulated in the specification that the Iu interface provided by RNC is open, and the signaling and interfaces of Iu CS domain and Iu PS domain are open. The signaling planes of Iu CS domain and Iu PS domain are both RANAP protocols, which are called RANAP-CS and RANAP-PS. The service plane in CS domain corresponds to voice, which needs to complete the rate adaptation of AMR and the coding conversion of TRAU, while the data service is directly sent to SGSN to complete the corresponding functions without coding conversion. The concept of wireless gateway is introduced into the network connection of Nortel Network. Wireless gateway is actually an integrated node of equipment. In version R99, new functions need to be added to the TRAU part of CS domain, and MSC and SGSN do not need to be changed. The interface provided by RNC is an optical fiber interface, which transmits ATM cells, with voice bearing AAL2 and data bearing AAL5. After AAL2 is connected through OC-3/STM- 1 board, it will be sent to TRAU to complete code conversion and rate adaptation, and it will be adapted to the synchronous stream of 64kbps TDM stream DDE 1 circuit to transmit user information. For the packet domain, it is converted into IP by SGSN, and the service will be carried on the IP backbone network and sent to GGSN. Signaling on the Iu Cs interface is transparent to TRAU, it is only a physical layer device, and will not analyze signaling messages. Therefore, from the signaling point of view, the signaling on Iu CS is a dialogue between RNC and MSC, which transparently passes through TRAU to MSC and is processed by the CPU of MSC. As for PS domain, because there is no need for rate adaptation and coding conversion in the middle, there is an Iu PS port between RNC and SGSN, and the direct protocol is still RANAP-PS protocol. The protocol from SGSN to GGSN will be directly converted into GPRS protocol DDGTP protocol, including GTP-C and GTP-U. The biggest difference from GSM is that as GPRS, the protocol between SGSN and GGSN is GTP-U, while the protocol between SGSN and PCU is still Frame Relay. In WCDMA, GTP-U protocol on Gn interface will be extended to Iu Ps interface. That is to say, starting from RNC, the service will assign a tunnel ID for Iu Ps and gn interfaces. Multimedia gateway MGW and call service will be introduced in R4 and R5 versions.
Question 8: What is the communication core network? I'm not sure what you want to know about the communication core network. The following are the network elements and related parameters of the communication core network, which I hope will be beneficial to you:
The network elements of mobile core network include mobile switching center MSC and subscriber home location register HLR. According to the specific functions of the equipment, the mobile switching center includes VMSC (end office), GMSC (gateway office), TMSC (long-distance traffic tandem office) and STP (signaling transfer point).
Main operating parameters of mobile communication core network
Both MSC and HLR include hardware and software from the perspective of system architecture, and the main parameters are divided into hardware parameters and software parameters. The hardware parameters mainly include the hardware processing capacity and storage capacity of the core unit and the throughput capacity of the peripheral unit; Software parameters mainly include the processing capacity of equipment for various businesses and processes. Parameters can be divided into static parameters and dynamic parameters according to whether the parameters change with business changes. Among them, static parameters refer to the indicators that users represent the overall processing capacity of software and hardware under a certain software and hardware configuration, and will not change with the change of business; Dynamic parameters refer to the parameters of CP load, relay and signaling occupation of core network elements that change with the change of user number and user behavior. Relevant parameters are as follows:
Main configuration and operating parameters of home location register HLR
Hardware/Software Serial Number Parameter Name Type Unit Parameter Indicator Meaning
Hardware 1 AC capacity static1the maximum weight that can be supported by 0,000 HLR.
Hardware 2 HLR capacity static 10000 maximum number of users that HLR can support.
The authentication number in the hardware 3 HLR is dynamic, and the authentication number existing in the household HLR is dynamic.
The number of users in hardware 4 HLR is dynamic, and the number of users existing in HLR is dynamic.
Hardware 5 signaling load dynamic ERL/ the number of signaling messages per relay bearer in the line.
Hardware 6 CP load dynamic% main processor load
Main configuration and operation parameters of mobile switching center MSC
Hardware/Software Serial Number Parameter Name Type Unit Parameter Indicator Meaning
Hardware parameters 1 VLR capacity static 10000 VLR database storage capacity.
Trunk capacity Static E 1 Number of configured trunk ports
3 Number of signaling ports Number of signaling processing units statically configured at 64kb/s
4 VLR occupancy dynamic% online users /VLR capacity
5 CP load dynamics% main processor load
6. Installation rate of dynamic relay% Actual open relay/relay capacity * 100%
7 traffic dynamic ERL/ line traffic carried by each trunk line
8 signaling load dynamic ERL/ number of signaling messages per relay bearer in the line
The BHCA value configured by the software parameter 1 is the number of calls that can be handled per hour configured by the static KBHCA.
2 Actual BHCA Value Dynamic KBHCA Number of calls actually handled per hour
3 BHCA load ratio dynamic% actual BHCA value/configured BHCA value
Other indicators 1 number of online users dynamic number of actual users of 10,000 VLR.
2 User startup rate% of dynamic startup users
3 switching system connection rate dynamic percentage switching system connection times/call attempts times
Question 9: Is there a relationship between the core network and the backbone network? Can you briefly explain the core network? First of all, the concept of backbone network exists in many directions, such as IP MAN and IP bearer network. The so-called backbone network is a network composed of core network elements connected at the upper layer of the network structure.
Secondly, aiming at this problem, I guess what the landlord wants to ask is the relationship between the core network and the backbone network of the bearing network. Each city (city: municipality directly under the Central Government) basically has its own local core network switching room to complete local and foreign traffic transfer and data transmission. If we want to exchange business with other places, we need to rely on a reliable transmission network to complete this task. So this reliable network provides an "interface" (actually a device), so we can connect the network element devices at the boundary of the core network to the "interface" of that reliable transmission network, and this interface will enter the backbone network to complete the transmission task when it goes up. Simply put, the bearer network is the state grid, and the core network is the network of each power station. To complete the overall planning of each power station, it is necessary to connect to the national grid.
Finally, attach the professional scope map of the core network.
Welcome to correct me.
Question 10: What is the mobile core network NEMU? Network element management unit