CN204408374U - A kind of 4G base station network system - Google Patents

Abstract

The utility model discloses a 4G base station network system, which is characterized in that it comprises a 4G core network unit, a 3G core network unit, a 2G core network unit, a convergence unit, a radio and television CMTS and a 4G base station; a 4G core network unit, a 3G core network unit The 2G core network unit is connected to the radio and television CMTS network system through the convergence unit, and the radio and television network CM of the CMTS network system is connected to the 4G base station, so that the 4G wireless service can be extended to the home through the radio and television wired network and compatible with 3G and 2G wireless services. The system constructed by the utility model has the advantages of flexibility, precision, speed, safety, and low cost, and is conducive to the fast, low-cost scale coverage and transmission capacity improvement of the 4G network.

Description

A 4G base station network system

technical field

The utility model relates to a 4G base station network system.

Background technique

Since the end of 2013, as China officially launched the LTE commercial process, global LTE has entered a stage of accelerated development, which has pushed global mobile users into a new round of growth track, and the data traffic carried on mobile networks has also shown explosive growth. situation. Ericsson recently released the "Mobile Market Report", predicting and judging the development trend of global mobile communications, especially LTE. The main conclusions show that China is expected to become the world's largest LTE market in 2019, with more than 700 million users. It accounts for more than 25% of the total number of LTE users in the world.

70% of mobile Internet traffic comes from urban areas, and 4G coverage in indoor and crowded areas has become a key issue for mobile communication operators to solve. A 4G network structure in the prior art is shown in FIG. 1 .

Utility model content

The purpose of the utility model is to provide a technical solution for realizing 4G coverage indoors and in densely populated areas. The specific technical solutions are:

A 4G base station network system, comprising a service management system, a 4G LTE core network unit, a 2/3G core network unit, a converging unit, a radio and television CMTS, and a 4G base station; the service management system data passes through the 4G LTE core network unit, The 2/3G core network unit accesses the radio and television CMTS through the convergence unit, and connects with the 4G base station through the CM of the radio and television CMTS, so that the 4G wireless service is extended to the home through the radio and television wired network and is compatible with 3G and 2G wireless services.

Further, the DHCP server of the radio and television CMTS provides separate address pools for the devices of the 2/3G core network unit and the 4G core network unit respectively.

Further, the aggregation unit includes a switch, a router and a PTN device.

Further, the PTN device has multiple uplink and downlink GE optical ports or 10G optical ports.

Further, the CM has a Layer 3 routing function.

Further, a 4G LTE Femto system gateway and a firewall are arranged between the 4G LTE core network unit and the convergence unit; the firewall is a "double layer heterogeneous" firewall.

Further, an LTE Femto system gateway and a firewall are set between the convergence unit and the radio and television CMTS; the firewall is a "double layer heterogeneous" firewall.

Further, the access network of the radio and television CMTS adopts an access ring; the access ring expands bandwidth by hop ring or split ring.

Further, the 4G base station is connected to two convergence nodes of the access ring; the two convergence nodes are located in the same access ring. the

Further, the 4G base station is connected to the PTN device of the access ring through a GE optical port.

Through the docking of 4G network equipment and radio and television network equipment, the utility model realizes the interconnection and business support between the radio and television operator network and the telecommunication operator's 4G core network unit, and optimizes the coverage of the 4G network based on the radio and television network to form a broad IP network based on radio and television The 4G LTE business form of the platform provides users with high-speed mobile Internet services. The system constructed by the utility model has the advantages of flexibility, precision, speed, safety, and low cost, and is conducive to the fast, low-cost scale coverage and transmission capacity improvement of the 4G network.

Description of drawings

FIG. 1 is a schematic diagram of a prior art network structure;

Fig. 2 is a schematic diagram of the network structure of Embodiment 1 of the utility model;

Fig. 3 is a schematic diagram of the network structure of Embodiment 2 of the present utility model;

In the figure: 201, 4G core network unit; 202, 2/3G core network unit; 203, first switching device group; 3, convergence unit; 301, second switching device group; 302, third switching device group; 4, Radio and TV CMTS; 5, CM; 6, 4G Femto base station; 701, LTE Femto security gateway; 702, GSM Femto security gateway; 703, TD Femto security gateway.

Detailed ways

Below in conjunction with accompanying drawing, the utility model is described.

Example 1

As shown in Figure 2, the 4G Femto base station 6 network system in the embodiment includes a service management system (not shown in the figure), 4G core network unit 201, convergence unit 3, radio and television CMTS4 and 4G Femto base station 6; 4G core network The unit 201 is connected to the radio and television CMTS4 through the convergence unit, and is connected to the 4G Femto base station 6 through the radio and television network CM5 of the CMTS network system. The 4G Femto base station 6 can be connected to the 4G Femto gateway and the core network unit through the radio and television CMTS4 private network transmission mode, so that 4G wireless services are extended to homes through radio and television cable networks.

This embodiment is a simplified network system, and all components can be expanded to increase bandwidth and network processing capacity; similarly, in order to ensure system reliability, servers, routers, switches and lines can adopt various backup mechanisms. The business management system is a variety of servers that provide business services. The 4G core network unit 201 includes switching equipment and a 4G LTE Femto security gateway 701. The switching device uses two core routers to form the first switching device group 203; the two core routers monitor each other through a heartbeat line. The two core routers of the first switching device group 203 are connected to the 4G LTE Femto security gateway 701 respectively.

A "double-layer heterogeneous" firewall is deployed between the 4G LTE Femto security gateway 701 and the aggregation unit to protect the security of the 4G LTE Femto system gateway and the 4G core network unit 201. The solution of deploying a firewall between the core router and the aggregation unit has low requirements on the performance of the firewall on a single node, the number of concurrent connections is not less than 200k, and the throughput capacity is not less than 400Mpps.

In actual implementation, the "double-layer heterogeneous" firewall can also be deployed between the switch and the radio and television jump router. Such a setting requires the firewall device to have high performance, and it needs to support no less than 1 million concurrent connections. Less than 1Gpps.

The aggregation unit is composed of a second switching device group 301 composed of 2 (active and standby) switches and a third switching device group 302 composed of 2 (active and standby) routers, and the two switching device groups are connected by optical cables. Two switching devices in the same group monitor each other through the heartbeat line.

Both the uplink and downlink ports of the switching devices in the switching device group use GE optical ports. According to the needs, the port capacity of the switching device can be expanded. Each switch adds 3 GE uplink optical ports, 1 to 10G uplink optical port (telecom network side) and 1 10G downlink optical port (broadcasting network side). The interconnection port of the router on the radio and television network side is upgraded to a 10GE optical port.

Or use a router, which requires a forwarding capability greater than 10Gbps, and each router provides at least one 10G downlink optical port, one 10G uplink optical port, and four GE uplink optical ports.

For local business-intensive areas, when it is difficult or costly to reconstruct and adjust the ring network, the existing GE access ring can be upgraded to 10GE. In order to reduce the construction cost of the 10GE access ring, the 10Km optical module should be selected first. When the transmission distance is long, the 40Km optical module can be selected, and the 80Km optical module is not recommended.

The aggregation unit still adopts the L2 VPN packet forwarding function. The aggregation unit uses 10GE PTN equipment to build a ring network, and the node switching capacity is not less than 160G. 40GE PTN equipment can be gradually introduced according to the bandwidth requirements of the aggregation unit.

The construction of the PTN access network should be based on the GE access ring. When the bandwidth of the GE ring in the existing network is insufficient, priority should be given to adjusting the number of access ring nodes to meet the bandwidth demand. The adjustment method is as follows:

1) Jump point group ring: Keep the original structure unchanged, and use a pair of fiber cores to form a jump point ring, which is mainly used in scenarios with abundant fiber core resources.

2) Split ring ring: make full use of the backbone access cable to re-arrange the ring or build a new optical cable according to the plan of the backbone access cable to reduce the connection of nodes on the ring to form rings. It is mainly used in scenarios where fiber core resources are tight.

When the bandwidth utilization rate of the aggregation ring exceeds 70%, a set of 10GE PTN system can be expanded. For urban areas, when fiber core resources are limited and the construction cost of PTN+OTN has certain advantages, a new OTN system can be considered; for county-city rings, due to the long transmission distance, comprehensive consideration of future business needs and network construction costs, It can be constructed in PTN+OTN mode.

The aggregation unit is connected with the access network. The access network is radio and television CMTS4; it consists of three routers and a DHCP server.

Set up an address pool on the DHCP server of the radio and television CMTS4 and provide it to the 4G LTE Femto equipment. The 4G LTE Femto equipment is connected to the router of the radio and television CMTS4 through CM5. The gateway 701 is then connected to the 4G core network unit.

The working mode of CM5 adds a routing mode while retaining the bridge mode, which can be used as a router. In this way, CM5 can meet the requirements of some 4G devices for static/fixed IP, NAT and other network configurations.

The 4G Femto base station 6 is connected to two convergence nodes of the access ring; the two convergence nodes are located in the same access ring.

In the embodiment, the PTN core network unit device supports the L3 VPN function, and realizes circuit scheduling based on IP addresses. The PTN core network unit equipment is responsible for forwarding the X2 interface information to the adjacent base station according to the IP address, and forwarding the S1 interface information to the corresponding SGW and MME in the SGW/MME or SGW/MME pool according to the IP address to achieve multi-homing requirements.

The switching capacity of the core network unit PTN equipment is not less than 320G. For provincial capitals, cities specifically designated in the state plan, or some cities with developed services, there is a large demand for large-scale services in the transport network in this area, and the core network unit can build multiple sets of OTN systems to share services according to service requirements. For general cities, when the number of configured channels exceeds 70% of the maximum number of configurable channels, new OTN system construction can be carried out.

In this embodiment, China's own standard radio and television C-Docsis network is integrated with TD-LTE transmission, and it can be extended to 5G. The radio and television network and communication network use the most profound integration model as the carrier to support the development of the next generation Internet and mobile Internet. Compared with conventional transmission methods, the converged transmission method has obvious advantages in terms of data transmission capacity, coverage of indoor/populated places, terminal equipment environmental adaptability, network security management and flexible configuration, etc., and solves the "last mile" problem of 4G networks. Coverage problems have effectively expanded the mobile Internet coverage and business transmission support capabilities.

Through the docking of 4G wireless network equipment and CM5 equipment of the radio and television network, the interconnection and business support between the HFC+CMTS network of the radio and television operator and the operator's 4G core network are realized, and the coverage optimization of the 4G network based on the radio and television network is carried out to form a pan-IP network based on radio and television The 4G LTE business form of the platform provides users with high-speed mobile Internet services. It is a new mobile Internet networking technology based on the integrated transmission of radio and television C-Docsis network and mobile communication 4G LTE network; it creates a wireless network solution that adapts to full frequency bands, multi-standards, and multi-operators.

Example 2

As shown in Figure 3, the difference between this embodiment and Embodiment 1 is that the telecommunications network in this embodiment also includes a 2/3G core network unit 202; the system can be compatible with 2G and 3G services, and 4G wireless services have not yet been opened. users to provide wireless network services.

In the core network unit, the 4G LTE core network unit is connected to the 4G LTE Femto security gateway through the core router; the 2/3G core network unit 202 is connected to the GSM Femto security gateway 702 and the TD Femto security gateway 703 respectively; The firewall is connected to the first switching device group 203 . The way of accessing the radio and television CMTS4 is the same as that of Embodiment 1.

For the convenience of docking, the DHCP server of the radio and television CMTS4 provides separate address pools for the devices of the 2G core network unit, 3G core network unit, and 4G core network unit 201 respectively. The network addresses are provided to GSM/TD/LTE Femto equipment through different address pools. After the GSM/TD/LTE Femto equipment obtains the address from the above-mentioned DHCP server, it is connected to the aggregation unit through the transmission equipment, and then to the Femto security gateway for implementation. access.

The above examples are only used to illustrate the utility model, in addition, there are many different implementation modes, and these implementation modes are all that those skilled in the art can think of after comprehending the idea of the utility model, so, it is not mentioned here List them one by one.

Claims (10)

1. a kind of 4G base station network system, it is characterized in that, comprise service management system, 4G LTE core network unit, 2/3G core network unit, converging unit, radio and television CMTS and 4G base station; Described service management system data passes through described The 4G LTE core network unit and the 2/3G core network unit are connected to the radio and television CMTS through the convergence unit, and are connected to the 4G base station through the CM of the radio and television CMTS, so that the 4G wireless service is extended to the home through the radio and television wired network and is compatible with 3G and 2G wireless service. 2. The 4G base station network system as claimed in claim 1, wherein the DHCP server of the radio and television CMTS provides separate address pools for the equipment of the 2/3G core network unit and the 4G LTE core network unit respectively. 3. The 4G base station network system according to claim 1, wherein the convergence unit is a PTN device. 4. The 4G base station network system according to claim 3, wherein the PTN device has multiple uplink and downlink GE optical ports or 10G optical ports. 5. The 4G base station network system according to claim 1, wherein the CM has a Layer 3 routing function. 6. The 4G base station network system according to claim 1, wherein a 4G LTE Femto system gateway and a firewall are arranged between the 4G LTE core network unit and the convergence unit; Build" firewall. 7. 4G base station network system as claimed in claim 1, is characterized in that, is provided with 4G LTE Femto system gateway and firewall between described converging unit and described radio and television CMTS; Described firewall is " double-layer heterogeneous " firewall . 8. The 4G base station network system as claimed in claim 1, wherein the networking mode of the access network of the radio and television CMTS is an access ring; Split ring group ring. 9. The 4G base station network system according to claim 8, wherein the 4G base station is connected to two convergence nodes of the access ring; and the two convergence nodes are located in the same access ring. 10. The 4G base station network system according to claim 8, wherein the 4G base station is connected to the PTN device of the access ring through a GE optical port.