Wireless Local Area Network (WLAN), one of the most exciting communication technologies, is now available in the enterprise, a technology based on the 802.11 family of standards. With the further development of business needs, more and more enterprises require less resources to achieve higher efficiency and productivity. In order to achieve this goal, IT organizations are now turning to these emerging technologies and trying to use these new technologies as A tool to achieve this goal. However, current WLAN solutions are not yet fully capable of addressing enterprise-level reliability, scalability, security, and manageability issues. By thoroughly examining existing problems in the wired and wireless arenas, next-generation systems provide IT organizations with solutions to current system deficiencies.
According to META Trend's research: In 2003, the focus of campus local area network (LAN) initiators focused on increasing the availability of the network. In their view, network availability has a higher priority than other applications that are about to surface (eg : VoIP). However, network intelligence will bring together voice, video, and data, making WLAN configuration easier. By the end of 2003, WLAN standards will focus on dual-band, and enterprises will rely more on wireless technology to reduce costs while increasing productivity. By mid-2004, WLAN security standards will be introduced and interoperable, and the market will be The focus will shift to management and services that are common on both wired and wireless networks.
The emerging WLAN solution is based on a single, interoperable Wi-Fi standard at a relatively low cost, paving the way for the development of the WLAN market. Although the first generation of WLAN products is very important, companies are more concerned about the future and whether the use of such products can meet the needs of enterprises, whether it can solve the actual problems of enterprises.
One of the biggest drawbacks of first-generation access point products is that they are unable to detect and collect information that appears in the radio frequency (RF) environment around them. This detection capability is very important for various reasons. With this capability, the access point can act as the eye of a broadband wireless system—using it, the system can explain what is happening in the RF environment around it, and can direct the access point to make the necessary changes. Since the presence of a large number of unlicensed frequencies causes the mutual interference of wireless signals, ITOs must improve their ability to view and control the RF domain, thereby mitigating mutual interference and ensuring optimal network connectivity and performance.
The first generation of products had only a few basic management frameworks that were augmented from traditional wired management systems. Therefore, to some extent, the wireless environment itself has no real management system. Many providers rely on existing system management providers to bundle these access points into the management framework of the broadband infrastructure. However, this implementation largely retains the wired central management approach, but does not provide a way to manage the RF domain. What's more, 802.11's Management Information Base (MIB) often uses proprietary protocols. The basic functions of wired SNMP-based management systems are limited and only some basic information can be used. For real-time applications, these real-time applications include mobile access between multiple access points or multiple IP subnets, and existing WLAN solutions are not optimal.
For an enterprise, security is still a key issue to consider when configuring a WLAN. In fact, our users will continue to make security the biggest obstacle for most businesses not to adopt WLAN. Although many standards have been proposed to solve security problems, if you want to use a first-generation product to implement a wireless network with high security, you need to integrate many cutting-edge products. Here, security will be largely concentrated on central access points and lack of broader system-level insights that are necessary for more effective management of security specifications.
Much like Ethernet, the 802.11RF environment is also a shared medium. However, unlike Ethernet, the 802.11RF environment is a limited network. At present, it is not possible to divide the bandwidth based on a single user, and thus cannot achieve effective expansion. Therefore, its scalability is still problematic. While additional standards, such as the standard 802.11b supporting data rates exceeding 11 Mbps, have been approved, the first generation of products did not provide support for these standards, nor did they consider the RF domain from the overall system level, thus making the entire The system does not control the transmission standards well and demonstrates better adaptability.
Develop applications in the RF fieldCompared to existing Ethernet local area networks (LANs), WLANs have a big difference - they use RF to send and receive packets. While this is easy to understand in a wired Ethernet environment, the current predictions for RF features are at best an art. To ensure that the level of performance required to support critical applications is met, WLAN systems must be further developed to provide more deterministic features. Due to the nature of wireless itself, unlicensed frequencies also share this environment because there is no single entity to implement spectrum control. Therefore, the WLAN must be able to detect and adapt to changes in the RF environment, which can mitigate mutual interference between access points, which may be temporary (for example, these disturbances come from elevator lifts), perhaps permanent interference. (For example, this interference comes from newly installed access points nearby).
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