Residential Wireless LAN design solution example

I. Basic Network Environment

This community was built in 1990s and is dominated by WIRED local area networks. There are two residential buildings, each of which has approximately 280 users. With the development of the times, people's demand for networks is also increasing. At this point, it is necessary to transform to a wireless local area network.

II. Application Requirements

1. flexibility and mobility in a wired network. The placement of network devices is limited by the network location. Therefore, instead of a wireless LAN, a wireless LAN can be connected to any location in the wireless signal coverage area. And the wireless LAN can be moved. Users connected to a wireless LAN can move and connect to the network at the same time.

2. Convenient Wireless LAN can reduce or minimize the workload of network cabling. Generally, you only need to install one or more access point devices to establish a local area network covering the entire area.

3. Plan and adjust the network. For wired networks, changing the office location or network topology usually means rebuilding the network. Rewiring is an expensive, time-consuming, waste, and trivial process. Wireless LAN can avoid or reduce the occurrence of the above situations.

4. It is easy to locate the physical faults of the wired network, especially the network interruptions caused by poor connection. It is often difficult to find out the physical faults, and the repair line will have to pay a great deal. Wireless Networks are easy to locate faults. You only need to replace faulty devices to restore network connections.

5. extended Wireless LAN can be quickly expanded from a small LAN with only a few users to a large network with thousands of users. It also provides features that cannot be achieved by wired networks such as "Roaming" between nodes.

6. Reduce network management and maintenance costs

Although the cable itself is not expensive During cable network resizing and upgrade, the cost of designing and implementing cabling by technicians cannot be underestimated. Therefore, users can perform simple and wireless network management and maintenance, is necessary and practical

7. Absolute security is required

The internal network does not allow any security threats from the Intranet or the Internet. The WEP is set to be manually configured to the ap and wireless network card. The administrator must also notify all users of the password for key sharing. If you want to change the WEP password, repeat the above process. Since everyone knows the key, it is easy to leak the key. You need to strengthen password management, which is only known to users and administrators.

3. Application Type

1. the embedded application environment embeds wireless devices into other products as a function module. For example, the wireless MiniPCI Nic is embedded into the notebook to enable wireless access for the notebook, and the wireless Nic is embedded into the printer for wireless printing. Tsinghua Tongfang successfully embeds the TFW2000 wireless client into an electronic scale. After the wireless network is connected, it can implement real-time management of fresh goods in supermarkets. Fresh Goods refer to fruits and vegetables, food and other goods that are measured by electronic scales. Currently, electronic scales in most supermarkets are not connected to the Internet, so they cannot reflect the actual inventory in a timely manner and may lead to waste of fresh goods.

2. Wireless Networks are suitable for sports competitions, conferences, and offices in temporary applications. The school sports meeting was just held in February September 30 at shoushi University. The whole venue was covered by tw2000a wireless network. There were five score logon points on the sports ground to count the score of the competition, in addition, the Service was transmitted to the podium server through wireless networks in a timely manner. After the individual competition was over, the podium won the competition rankings and quickly passed the broadcast report. The Brocade network storage Forum needs to log on to attendees during the meeting. To ensure efficiency, it is divided into multiple logon points, each of which is a server that collects data through the wireless network, fast and flexible wireless network networking, high reliability ensures the success of the Conference

3. network topology applications. The wireless coverage of a common residential area is divided into two layers: the access layer and the Convergence layer. The access layer consists of wireless aps to achieve the access of users' Wireless terminals. The convergence layer consists of wireless bridges, which are used to aggregate the signals of Wireless AP access to the network outlets of the residential area. To reduce the possible failure rate, the fewer wireless cascade layers on the aggregation layer, it is recommended that the AP signal be directly aggregated to the network outlet through the first-level bridge when conditions are met.

4. Wireless convergence applications. The data traffic at the aggregation layer is large, so ensure that independent channels without interference are used. For communities with a small number of users, You can reserve a clean channel for the aggregation layer during the overall planning, and set an AP as the central access point on the roof of the building where the network exit is located, use a large-gain omnidirectional antenna. Set up a bridge on the roof of the AP where the access layer is installed to transmit the Access Signals of one or more aps to the central access point. To reduce the number of bridges, the access layer AP should focus on the same building as much as possible to cover the surrounding buildings. full coverage covers all buildings within the scope of the wireless LAN

Iv. Functional Requirements

NOTE: If it is difficult to purchase, the replacement of the same product requires the new network to be absolutely independent, so that the physical layer and the management network are isolated, so as to completely eliminate all risks from the internal and external networks. The new network must be available flexibly and be used as a supplement and extension of the original network. In addition, in addition to providing services to users and internal staff, it also needs to meet the needs of high-speed, high-stability, high-security, high-availability, and other high-performance, high-performance Layer-3 Gigabit Switch GSM7312, as the core switch of the Internet, it connects directly to the server, connects to the Internet through the firewall, and connects to the smart switch fs0000t of the working group at the same time.

GSM7312 provides 12 10/100/1000 M RJ-45 ports (all ports support self-negotiation and MDI/MDIX cable adaptation), 12 MiniGBIC (SFP) the slot provides Gigabit Optical Fiber connections (each 1000Base-T is shared with the corresponding MiniGBIC port ). Flexible port configuration provides great flexibility for setting up the Internet.

Use the fiber interface of GSM7312 to connect the Working Group switch fs0000t of the floor data center with gigabit optical fiber. Fs0000t has 24 10/100 Mbps ports, 2 10/100/1000 Mbps RJ-45 uplink ports, and 1 Optional SFP slots connected with fiber optics.

The Wireless Access Point uses WG302 AP, which has the IEEE 802.11g feature, so that the Turbo mode supports a maximum of Mbps high speed. WG302 has built-in AutoCell technology designed for enterprises to ensure strong rfrf management and control. WG302 supports WPA and 801.1x to fully ensure Intranet security.

The NMS100 can help you configure, manage, and diagnose networks to ensure that the network can deliver data and services in a timely, reliable, and at least costly manner. NMS100 is easy to use and provides warning and protection. NMS100 makes network management tasks of various complex data networks that require monitoring and control easier.

At the same time, the use of specially designed antennas, with a stronger signal coverage range "Finger-shaped" Small Design

5. Wireless Network Topology

In order to have a more efficient wireless network, this community uses "wireless coverage of the entire Community" wireless coverage of the entire community.

1. One-kilometer network connected Taibei Wireless LAN Solution
2. Detailed explanation of WLAN Technology