Norgin Wireless design and Exploration Services

Before the deployment of wireless LAN, we can not clearly know the number of devices deployed and installed. Only in the coverage of the location of the survey and indicators, to determine the AP, antenna and other devices of the model and quantity. At the same time through the survey and calculation, to determine the position of the AP cloth, antenna azimuth angle and other engineering design parameters, as a guide for the installation of the project information.

WLAN network reconnaissance operation guidance

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  Engineering instruction

  Wireless engineering survey is an essential part of WLAN network, directly determining the feasibility and practical performance of the scheme, and also providing original reference basis for latter-period program design and engineering implementation.

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  Preparation for network survey

  WLAN engineering personnel, after receiving network planning task book, makes the network planning implementation scheme, and do joint consultation concerning network survey conditions and network survey scheme and demand, clarifying the following information: determining a coverage area, and clearly covering the plane graph that requires familiarity with the coverage area to understand the present network situation.

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  Software Preparation for Network Survey

  Wireless design software AirMagnet Planer, Wireless exploration and analysis software AirMagnet_Surveyor, Wireless device signal coverage and location software Cisco CMX, Wireless device management software Cisco Prime Infrastructure, Wireless packet capture software

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  Content of network survey

  Plane area coverage situation, including coverage area size, and distribution of blocking objects of plane graph covering area, in order to analyze the signal of the barrier needs to be the number of users that need to be connected for signal blocking and position cable network situation in compliance with equipment bandwidth access requirements, and export resources, etc.

WLAN indoor coverage survey design

WLAN indoor planning generally considers only the user data joining through WLAN access in the same floor area, and different storeys should be separately considered for coverage planning.In the planning the WLAN network, the first consideration is the effective interaction between the AP and the wireless terminal, and the second is the effective bandwidth of the access users.

Three ways to optimize the wireless network: Wireless selection and adjustment - omnidirectional and directional, rod, plate, wall hanging, ceiling drawing, etc.Power adjustment-manual adjustment, automatic adjustmentChannel adjustment: manual adjustment, automatic adjustmentModification scheme:At AP displacement corner of engineering area, directional plane antenna is used for coverage. Between the Marketing and Sales departments one set of AP is used for coverage, and no cross-cell switch with high-gain directional antenna in the corridor 1 will be used for coverage, and Yagi antenna can be considered for use.

WLAN outdoor coverage survey and design

• WLAN indoor coverage planning principles

  In the WLAN outdoor coverage planning, the first consideration is the interaction between the AP and the wireless terminal signal, which ensures that the user can effectively access the network. In the antenna selection, it is necessary to take into account the uniform distribution of the signal, the focus area and the signal collision point, and you need to consider the antenna azimuth and angle adjustment. The position of the antenna installation should ensure that the main beam direction of the antenna is opposite to the target area. You should cover the same-direction frequency point AP as much as possible that has the same frequency in order to avoid interference. For residential coverage, the wireless signal that from the outside goes through the closed concrete wall is almost not available, and therefore we only consider the use of the incident signal from the door and window. The covered area should be as close as possible to the AP antenna, and the antenna is covered with the AP antenna as far as possible. For a height of more than 8 floors (24 meters) of the building, outdoor use is not suitable.After reflection of the antenna signal by the opposite building,,there will be some signal reflected back to the floor; in general, we do not take into account the use of reflection signal to cover the floor. For floor space within 30 meters, it can be considered to install AP and antenna in the middle of the floor, and the AP signal coming through windows and doors can effectively cover the floor of the vertical 2 rooms (about 8 meters). If the building has more than 3 rooms (12 meters), there is need to consider covering the floor from both sides of the building.For tenants room structure is more complex and difficult to cover from one side, it can be considered to do a double cover or select the bedroom, living room and other key areas for covering.Due to the directional coverage, the AP usually uses an antenna that is directional.The best installation position of the antenna is generally the middle position of the floor. If it is really difficult to find the buildings that can be used, you need to consider the use of living area, a lamp post, or plus cement column for AP and antenna fixture.

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  Coverage scheme commonly used in the WLAN outdoor survey:

  Install directional antenna in th centrai position of the building and make it enter the opposite building for WLAN coverage, that is high-gain and has higher horizontal beamwidth;fix the antenna in a high position and maintain a certain lower angle fot the outdoor space coverage;do upward inclination of the antenna to realize indoor orientation coverage.