Huawei Indoor WLAN Deployment Guide

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1 Huawei Indoor WLAN Deployment Guide

2 Project Preparation Coverage Design Placement Design Bandwidth Design Power Supply and Cabling Design Project Cases 1

3 WLAN Planning Process Project Demands collection Pre-sales planning Customer communication & quotation Site survey After-sales planning Delivery Demands collection list Small and medium projects with simple scenarios: AP calculator Survey information list Large projects Site survey with complex scenarios: professional WLAN Planner Tool The WLAN Planner Tool can also handle some high demanding pre-sales projects. Set the product and scenario types and enter several parameters and you can calculate the number of APs easily. Years of planning data to help realize automatic deployment of APs. Automatic output of planning reports, including product list and simulation diagram. Note: The basics and designing principles in this presentation are for reference and communication. Automatic WLAN Planner Tool are now available. 2

4 WLAN Planning Process Different scenarios have different requirements, which may lead to slight difference in planning solution and key points to consider. The past experiences show that most planning solutions are easy, which consists of coverage, placement, bandwidth, and cabling. This presentation gives a brief introduction to the design principles of each process for reference. Coverage design Pre-sales WLAN planning Placement design Bandwidth design Cabling design Note: The designing principles in the presentation are version , which may be upgraded and tested in the future. To get the latest version, visit 3

5 Demands Collection Type of Demand Description Support from Planning Tool Coverage area Field strength Number of access users Major coverage area and minor coverage area. Customers with high technical skills may have some requirements on field strength. Number of online users allowed in a coverage area at the same time. The support for major and minor coverage areas is preset in the planning tool and oneclick configuration is supported. If customers have specific requirements on field strength, manually configure the signal strength on the planning tool. If customers have no specific requirements, use the preset experience data. Preset experience data (changeable) Bandwidth Coverage mode Power supply mode Switch location Services of customers and customers' limit on the bandwidth of each user. Whether customers have specific requirements on signal coverage, indoor placement, indoor distributed deployment, or outdoor coverage. Whether customers have specific requirements on power supply mode, whether there are any power supply facilities and areas, and whether they can be used or not. WLAN is connected to the switch. Preset experience data (changeable) The current planning tools support only indoor placement. The tools support PoE drawing Switches and network cables can be drawn on the planning tool. 1. A detailed drawing of the coverage area is a must. 2. Different projects may have different scenarios and requirements. The items in the list are the basic information. Special requirements from customers must also be studied. 4

6 Site Survey Information Besides the basic project requirements in the previous list, other requirements must be obtained through site survey. There are simple site survey and detailed site survey for different scenarios with different requirements and investments. Simple site survey: pre-sales project with simple scenario and no specific requirements Simple site survey list: Item Main obstacles in the coverage area Environment of coverage area Description Type and specifications of the obstacles. A brick is about 240 mm thick. Most obstacles are preset in the planning tools. Drawings cannot provide complete and clear information. So pictures need to be taken to show the layout, coverage area, walls and ceilings of the site. Construction feasibility Whether APs can be placed, the distance between APs and power source devices, whether cabling is feasible. Detailed site survey: The scenarios are complex or customers have high requirements on the pre-sales planning. Site survey list: <WLAN Indoor Site Survey Information Checklist> 5

7 Project Preparation Coverage Design Bandwidth Design Placement Design Power Supply and Cabling Design Project Cases 6

8 Coverage Area Description In project designing, study the scenarios and drawings and communicate with customers to determine the WLAN coverage area. Coverage Area Field Strength Typical Area Key coverage area -40~-65 dbm Dorm room, library, classroom, hotel room, lobby, office, and hall Common coverage area >-75 dbm Corridor, kitchen, storeroom, and dressing room Special coverage area N/A Area that is specified for coverage and installation or does not allow coverage or installation 7

9 Design Principle It is recommended that you take the coverage radius of each AP as 20 m in WLAN planning. Note: This recommendation applies to ideal scenarios with no interference and obstacles and in which customers have no specific requirement on field strength. Relationship between signal transmission distance and loss: Distance 1 m 2 m 5 m 10 m 20 m 40 m 80 m 100 m 2.4 G 46 db 53.8 db 64.2 db 72 db 79.8 db 87.6 db 95.5 db 98 db 5.8 G 56 db 63.8 db 74.2 db 82 db 89.8 db 97.6 db db 108 db Tip: Signals attenuate by 6 db every time the transmission distance doubles. Calculation formula for field strength (factors of interference and path loss are excluded): Final signal strength = AP transmit power + Antenna gain - weakening value - radio attenuation due to obstacles Theoretically, the signal strength is 5.8 GHz when the transmission distance is 20 m. AP transmit power (20 db) + Antenna gain(3 db) Signal loss due to distance (89.8 db) Signal loss due to obstacles (0 db) = 66.8 db Note: The next page is the list of signal losses due to some common obstacles for your reference. 8

10 List of Signal Losses Due to Common Obstacles List of signal losses due to some common obstacles Typical Obstacle Thickness (mm) 2.4 GHz Signal Loss (db) 5 GHz Signal Loss (db) (db) Synthetic material Asbestos Wooden door Glass window Heavy colored glass Brick wall Brick wall Armored glass Concrete wall Metal

11 Project Preparation Coverage Design Placement Design Bandwidth Design Power Supply and Cabling Design Project Cases 10

12 Channel Design Principles 1. Before planning, consult customers about the available local channels. 2. Avoid co-channel interference: Do not use the same channel in any direction. 1. Figure out the local available channels: In China, the available channels for 2.4 GHz frequency band are: 1, 6, and 11; and the available frequency bands for 5 GHz frequency band are: 149, 153, 157, 161, and 165. Different countries or regions have different available channels. Some countries and regions have reserved channels. Be sure to figure out all the channels before planning. 2. Avoid co-channel interference: Use different channels on each floor and neighboring floors in multi-floor scenarios. If different channels are not available, reduce transmit power to decrease overlapping coverage area. Schematic diagram: Stereo diagram: 11&153 1&157 1&161 6& &161 1&153 11&

13 Placement Design Principles 1. Minimize the number of obstacles signals penetrate. 2. Ensure that the AP faces the target coverage area directly. 3. Place the AP away from interference source. 1. Minimize the number of obstacles signals penetrate: Minimize the number of walls and ceilings signals penetrate. Make sure the signals penetrate the walls and ceilings vertically. 2. Make sure the AP face the target coverage area directly. If only one AP needs to be installed in a hall, install it in the center of the hall ceiling. If two APs are required, install them on the two diagonal corners of the ceiling. The direction of APs is adjustable. Make sure the APs directly face the target coverage area to achieve the best coverage effect. 3. Place the AP away from interference source: Place APs away from electronic devices and make sure the coverage area is free of any electronic devices like microwave cookers, wireless cameras and cordless phones. 12

14 Project Preparation Coverage Design Placement Design Bandwidth Design Power Supply and Cabling Design Project Cases 13

15 Throughput Design Principles AP single frequency band of an AP supports 20 users, and dual bands support 40 users Note: This recommendation applies when users have no specific bandwidth requirements. Relationship between per user bandwidth and number of users: No. Maximum Number of Supported Users User Bandwidth (Mbit/s) Downstream Upstream Maximum Supported Users of Single Band 1 2 Mbps 1 Mbps Mbps 512 kbps kbps 512 kbps Relationship between number of online users and per user bandwidth: Maximum Supported Users of Dual Bands Number of Users Bandwidth (Mbps) Upstream Downstream The tables show that available bandwidth does not decrease linearly as users decrease. For example, when there is one user, the available bandwidth is 80 Mbps. But when there are five online users, the available bandwidth for each user is 10 Mbps and the total bandwidth is 50 Mbps. 14

16 Project Preparation Coverage Design Placement Design Bandwidth Design Power Supply and Cabling Design Project Cases 15

17 Design Principle Cabling design principles 1. The lengths of cables between APs and switches must be no more than 90 m. 2. Reserve 5 m of cables for future adjustment. 3. Keep cables far away from electromagnetic field. 4. Consult with customers before planning so that customers would not object to construction because of building exterior or property factors. Power supply modes: 1 Preferentially use the PoE switch that is compatible with 802.3a/f. PoE switch 2 3 Use the AC adapter when AC power supply is available. Use the PoE adapter when AC power supply is unavailable. Local AC power source PoE adapter 16

18 Project Preparation Coverage Design Placement Design Bandwidth Design Power Supply and Cabling Design Project Cases 17

19 Project Case of Office Area Office AP coverage The requirements collected are as follows: Building drawing of the office area: Type of Demand Coverage area Field strength Number of access users Bandwidth requirements Coverage mode Power supply mode Switch location Confirmation Result Three-floor office building: Office area: 130 m x 80 m. Key area: seats and conference rooms. Common area: corridors and tea rooms. No specific requirement on field strength. Ensure that key office area can receive signals. About 100 users. For details about the distribution, see the drawing. 1 Mbit/s+ for each user Indoor PoE power supply The room next to the stair in the upper right corner of the office area 18

20 Design Principle The information in simple site survey list are acquired when communicating with customers on site. So no need to conduct additional site survey. The buildings in WLAN placement scenario are basically concrete walls, glass walls and wooden doors. No other materials or non-wifi interference sources are present. Confirm the way of cabling on the ceiling with customers. Device model selection: In indoor scenarios, select AP6010DN of the n, dual frequencies, which support terminal access of multiple protocol types and increase access users. Coverage design: Use load-bearing wall and other obstacles that greatly weakens signals to divide large coverage area into multiple small areas. In this project, office area and conference rooms are divided into eight areas, each of which can be covered with one AP. A total of eight APs are needed. Placement design: Each AP is ceiling mounted at the center of its coverage area and uses different channels form those of neighboring APs. (1/149, 6/153, and 11/157) Bandwidth design: The total number of users are 100. Each small area holds at most 30 users, which can be covered by dual frequencies AP. The maximum bandwidth requirement of each small area is 30M, while 11n dual frequencies APs can provide more than 80M bandwidth, which can well satisfy the needs. Power supply and cabling design The distance between the PoE switch and the farthest AP is 70 m. The two can be connected. 19

21 WLAN Planning Tool Realizes Easy Installation The WLAN planning tool developed by enterprise network product development team (PDT) simplifies installation and generates professional and understandable planning report to facilities communication with customers. The tool realizes WLAN planning in six steps: 1 Create a new planning project and import the building drawing 2 Draw obstacles based on actual environment. 3 Locate the coverage area on the drawing and set the coverage requirements of the area. Note: By default, the tool will present the requirements of typical scenarios based on project experiences. So you do not need to set the requirements of some common projects. 20

22 WLAN Planning Tool Realizes Easy Installation 4 Automatic planning and placement by one click 5 Placing switches and cables Note: When the length of cable is more than 100 m, the tool will prompt a message. 6 Exporting planning report by one click. - Available report in Word or PDF format - Detailed product list - High simulation graph 21

23 Characteristics of Different Scenarios The following are typical indoor installation scenarios. Besides the planning principles and steps introduced before, the following are the unique characteristics of some scenarios. Typical Scenario Scenario Characteristic Project Characteristic Office building Classroom 1. Vast open space 2. Few and low obstacles 3. High requirements on the number of access users and bandwidth 1. Small area with many people 1. The number of APs must satisfy the user and bandwidth requirements. 2. Reduce AP transmit power to lower co-channel interference. 1. AP dual frequencies coverage to increase access users. 2. Reduce AP transmit power to lower co-channel interference. Station 1. High population mobility 2. Low requirements on concurrent users and traffic bandwidth 3. Most access users are cell phone users. 1. The AP must be able to cover the whole area. 2. The AP must be placed high. Ceiling mounted AP would be the best. Plant Building 1. Obstacles in various locations and of different heights 2. Low requirements on concurrent users and traffic bandwidth 1. The AP must be able to cover the whole area. 2. The AP must be placed high. Ceiling mounted AP would be the best. Exhibition hall 1. High population mobility 2. Low requirements on concurrent users and traffic bandwidth 1. The AP must be able to cover the whole area. 2. Reduce AP transmit power to decrease interference among neighboring exhibition rooms. 22

24 Help Seeking Flow Network solution: China: Frontline personnel Enterprise business sales department Enterprise network professional service team Zheng Xiaodong Zhao Yawei Outside China: Frontline personnel Enterprise business sales department Enterprise network professional service team Xu Zhi Zhao Yawei WLAN Planner Tool: Contact person: Public Public forum: Hong Lifeng ml?tclass=409 23

25 HUAWEI ENTERPRISE ICT SOLUTIONS A BETTER WAY Copyright 2012 Huawei Technologies Co., Ltd. All Rights Reserved. The information in this document may contain predictive statements including, without limitation, statements regarding the future financial and operating results, future product portfolio, new technology, etc. There are a number of factors that could cause actual results and developments to differ materially from those expressed or implied in the predictive statements. Therefore, such information is provided for reference purpose only and constitutes neither an offer nor an acceptance. Huawei may change the information at any time without notice.

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