How to integrate wired wireless access technology into practice

Wireless access technology is developing rapidly, but the demand for wired technology is still high. How to Integrate wired and wireless practice is a problem that needs to be considered. In September 14, 1987, China sent the first email to connect China and the world. The beginning of the Chinese Internet not only slowed down the speed of China's communications with the world at the first bps) but also the wireless access technology system was very complicated, the technologies used in the physical layer and link layer include serial communication, ATM, Ethernet, and xDSL. The Ethernet technology is one of the technologies in LAN, in Wan, technologies such as E1, SDH, and ATM are widely used, and remote dialing is also widely used. Over the past 20 years of development, Ethernet technology has evolved from LAN technology to man technology, and has gradually moved to wide area network technology, becoming the only technology that actually builds the entire internet. The Internet has completed technological unification in its unique way. During this period, TCP/IP protocol families also stand out from ISO, Banyan, AppleTalk, Novell, and IBM protocol families, eventually it became a standard protocol for the Internet, and the wired network technology was integrated.

The inevitable development of the integration of wired networks is shown in Darwin's evolution-Survival of the fittest. Only simple and easy-to-use technologies can be accepted by everyone. This is because everyone has limited energy, it is impossible to learn all the technologies. The simpler the technology, the more people will be accepted. In the end, this technology will become a successful technology. From the network management perspective, the complex network topology composed of different technologies is difficult to manage and the management software is huge. different platforms are required. An integrated network requires only one platform and one topology, this greatly reduces the workload of management and maintenance.

The essence of integration from the perspective of network evolution

Integration is the inevitable direction of network development, but what is integration? How many devices with different functions are collected to one device? Or power the wlan ap with an PoE switch? Before answering this question, let's take a look at the process of wireless technology: the first generation of mobile phone technology emerged in 1985. However, due to the different standards and implementation methods of various countries, communication cannot be achieved, therefore, in 1982, a series of "Mobile Expert Groups" were set up to develop interconnection standards. The abbreviation of GSM, namely the Mobile Expert Group French: Groupe Sp é cial Mobile, was changed to Global System for Mobile Communications ). During the development of wireless technology from 1g to 2G to 3G, there have been two problems plaguing carriers and the industry: first, there is no smooth upgrade between each generation, from terminals to base stations to core networks, each time the upgrade is performed, the previous generation will be re-initiated. Second, the products of the same generation are incompatible, that is, the base station and the core network must be a product.

Therefore, when formulating 4G standards, the integration requirements become the main starting point. In the 4G standard, access is wireless, and all speech and data are carried on the IP network. This simplifies the network architecture and improves network interconnection through standard technologies. As an important part of 4G technology, WLAN has achieved wireless network integration. The wireless access technology uses the 802.11 standard. After the wireless access technology, all services are carried on the IP base, speech-dependent SIP is a mature technology of existing networks. A basic starting point for WLAN standards is forward compatibility. When deploying the Next Generation Network 802.11n, it is naturally compatible with terminals of 11a, B, and g to ensure that users' initial investment will not be lost due to network upgrades.

From the wireless integration process, we can see that the essence of integration is to separate various layers of network technology and develop independently at each level. At the same time, the existing technologies that have been recognized are widely used, reduces the deployment cost of the entire network. Wireless evolution is to restrict the Wireless Technology Bureau to wireless access technology. The existing IP technology is used from the network layer, and users' wireless access technology authentication is summarized into existing Authentication servers, voice Technology depends on the SIP server, and multimedia technology depends on the Media Server. By separating all layers, the network architecture is modularized and simplified, and each layer is refined, allowing customers to focus on their own businesses, the Network has also achieved better development because of exquisite services, which is the essence of wired and wireless integration.

Value of Integration

One day in 20XX, Tom was about to enjoy music on his way to work. He connected the Internet through a hand-held terminal supporting software radio. Wireless access technology via WLAN at home, high bandwidth, fast download, the first song of the album has started playing now. After leaving the door, the terminal seamlessly switches to the wireless network of the operator, and the bandwidth is a little low, but it can also ensure that the next song is downloaded before the song is heard. On the bus, Tom began to organize and arrange today's work, and began to process emails in the mailbox. After arriving at the company, access the company's Lan, attend the morning meeting convened by the leaders, and report on the progress of the project management. The entire process passes through the home network, operator network, and office network of the company. The working mode of the terminal is from the wireless LAN to the wireless network of the operator to the wired LAN, but the network has not been interrupted, this is the value that the integrated network brings to users.

The value brought by integrated technology is not only about the uninterrupted internet access of Tom, but also the reduction of networking costs, resizing costs, and operation costs, and convenience of business development. Cost reduction: the WLAN technology is integrated with the wired network. during deployment, due to the standardized WLAN Equipment, the original network system, management system, and access authentication system can be reused, network investment can be greatly reduced. At the same time, the reuse of existing systems makes it unnecessary for users to learn new knowledge, saving time and training costs. Once the network fails, familiar with the existing system can also quickly locate faults, which can greatly reduce the loss caused by faults in the operation process. In addition, when the currently deployed 11a/B/G network is upgraded to the next generation 11n, the terminals purchased in the early stage can still be connected to the network without any impact, ensuring the customer's historical investment. When upgrading and resizing a WLAN Network, simply adding standard AP can increase the access capacity, while the existing network architecture is basically not changed, effectively reducing the expansion cost.

Simple on-site maintenance and resizing: when deploying a wlan ap, fully considering the characteristics of the wired network, the zero-configuration out-of-the-box technology is used, and the existing wired access network is not modified, you can only modify the configuration of the DHCP server or DNS server and configure it on the wireless controller AC to provide the WLAN Access Service, which greatly reduces the network deployment cost. When a device needs to be changed, the new AP device can be connected to the network by connecting to the ethernet cable. The configuration on the wireless controller does not need to be changed and there is no technical background requirement for the installation and maintenance personnel, easy device maintenance and replacement and network resizing.

Improve maintenance efficiency: power is provided to the wlan ap through the PoE switch during deployment. Management and optimization of the WLAN network requires that the ethernet cable be directly pulled when the AP is moved, greatly reducing the workload. If you need to enable or disable the AP during management and maintenance, you only need to perform operations on the PoE switch on the network management side to easily implement the O & M, improves management and maintenance efficiency and saves the user's management and maintenance workload. Achieve network-wide security: integrated with wired terminal control software, unified authentication control, and effective one-time authentication to achieve multiple billing modes and unified anti-virus methods, the security of wireless networks is the same as that of wired networks, effectively avoiding the introduction of new viruses. Focuses on preventing 802.11 Physical and link layer security and linkage with wired network security to ensure full network security.

Unified and efficient management platform: WLAN network management is the same as wired network management. The same alarm platform and log management system are used to display the complete network topology on the same interface, radio frequency management is independent of management components to fully implement integrated management of wired and wireless networks. There is no need for a separate platform or two interfaces, naturally, you do not need to purchase specialized servers or additional management system training. Through integrated topology management, when the network fails, you can easily see from the network topology that the fault point of the network is the failure of the PoE power supply on the wireless access technical port, or the link is faulty, or is there a broadcast storm in the network, resulting in too busy data exchange on the link. This reduces the management workload of Fault Locating personnel. Through the integration management of the human network, when users access the network, they can display the device port on which the user is on the network in real time to quickly locate the faulty user.

Application of wired and wireless Integration

Wired and wireless integration is widely used in campus, venues, medical care, operators, manufacturing, and other fields. More and more customers have recognized the value and convenience brought by integration, and actively promote the development of integrated technology. The following are two typical deployment cases of integrated applications. Founded in 1896, Southwest Jiaotong University is the first national key university to enter the "211 project" construction and set up a graduate school. A wired network has been deployed before the WLAN wireless campus network is deployed. The authentication and billing method has been confirmed. by deploying an integrated wireless network, you can make full use of the existing billing system and an account, to meet the needs of wired and wireless Internet access, you can also implement different billing policies for wired and wireless networks, and access the Intranet and Internet through one authentication, and achieve differentiated billing.

The National Grand theatre is located in the heart of Beijing. The main building is a unique shell shape. The shell surface is cleverly spliced by 18398 titanium metal plates and more than 1226 ultra-white glass, create the visual effect of the Stage curtain. Because of the unique construction structure and special communication requirements of the National Grand theatre, an integrated wireless network must be used for network deployment, in addition to providing basic data service ticket checking systems and office systems, voWiFi and other value-added services are also provided. The entire network uses the PoE Power Supply whenever possible, and adopts integrated network management and authentication to reduce the overall network deployment cost and management and maintenance cost. By deploying an integrated network, no changes have been made to the buildings, ensuring the integrity of the architectural design.

Conclusion

Although the current network is moving towards integration, there is still a long distance from the Integration goal. Due to the development of the network status and technology, the development process of network integration is still slow, it is worth noting that both operators and equipment providers have seen this point. The proposal of the 3G R4 version and IMS guides the direction of integrated network development. At the same time, the emergence of cloud computing will greatly promote the penetration of integrated network applications into enterprise applications, thus driving the development of networks to a higher level of integration.