




版权说明:本文档由用户提供并上传,收益归属内容提供方,若内容存在侵权,请进行举报或认领
文档简介
1、无线网络设计及部署,模块内容,部署方法 部署需求 Protocol Comparison 企业无线网 Coverage & capacity 确定AP数量和位置 Z factor design Site Survey 验证无线网部署,Determine Deployment Requirements,Assess,Determine AP Count & Placement,Deploy,Place Access Points,Survey WLAN,Verify,Planning Tools,Site Survey,Z Factor,部署方法,Protocol requirements 80
2、2.11b/g 802.11a Client devices WNIC PDA Phone Client density Typical Peak Expected throughput 802.11b is typically 2 Mbps 802.11g is typically 11-14 Mbps 802.11g is typically 2-4 Mbps with 802.11b clients presents 802.11a is typically 11-14 Mbps,部署需求容量考虑,协议比较,The standards that must be supported by
3、an enterprise WLAN are usually dictated by the devices that require support. Currently 802.11b clients are predominant but what is right answer for your enterprise WLAN solution? 802.11b Pro: Highest market penetration Con: More interference & noise may be found in the 2.4GHz band Con: Only provides
4、 3 non-overlapping channels Con: Can suffer from multipath issues Con: Client driver quality (consumer versus enterprise) 802.11g Pro: Higher throughput Pro: OFDM technology reduces multipath issues Con: More interference & noise may be found in the 2.4GHz band Con: Only provides 3 non-overlapping c
5、hannels Con: Throughput degraded in the presence of 802.11b clients 802.11a Pro: Higher throughput Pro: OFDM technology reduces multipath issues Pro: Provides FCC 24 non-overlapping channels Con: Lower market penetration 802.11n Pro: MIMO/Channel combined/Packet Aggregation provide More Stable conne
6、ction, higher performance and longer distance Con: Not finalized yet Con: Need more power,Coverage Areas Full or partial Coverage Hole Goal 0% - 10% (Typically 2% 5%) Building Construction Type Typical Offices (cubes and walled offices) Walled Offices (drywall office only) Walled Offices (brick and
7、concrete walled offices) Other (example arenas, stock exchange, convention center, large warehouse) Building Characteristics Homogeneous same construction type throughout Cubes and walled offices throughout and/or floor to floor Heterogeneous mixed construction types Drywall office area with shippin
8、g warehouse in back,部署需求覆盖,部署需求障碍物考虑,Normal construction provides a myriad of wireless obstacles,Distant corners,Walled office area,Break room with microwave,Concrete walls with iron rebar,High mounting positions,Meeting room with high peak users,Elevator shaft and stair wells,部署需求提问,How many access
9、 points do I need? Purchase more AP than determined AP count At best case, will allow over-deployment to ensure seamless coverage and higher capacity allowing Cisco Airespace controller to compensate for overlap At worst case, will cover unforeseen coverage hole Where should I place the access point
10、s? Place AP where WLAN clients will be located Do place AP in a meeting room as opposed to an adjacent hallway Do place AP in a central location which can cover several walled offices Do not place APs in a wiring closet Place AP in the middle of coverage areas How many controllers will I need? Provi
11、de enough controllers to perform the suggested high availability schemes available to provide enterprise reliability Where should I place the controllers? Place the controllers in different wiring closet to reduce power loss issues,部署需求AP摆放,Over cubicles outside of offices,In meeting room with high
12、peak users,Inside load bearing walls,Positioned to cover 2 rooms with non-load bearing walls,企业无线网覆盖和容量,80 ft,Basic coverage, low cost,Enterprise coverage & capacity,60 ft,802.11a:11-14 Mbps 802.11g:11-14 Mbps 802.11b/g:2 / 2-4 Mbps 802.11b:2 Mbps,Graphic is using only 3 channels for interference av
13、oidance,企业无线网策略,Smaller, overlapping cells Increased average capacity 802.11a can provide more channels to reduce interference Provides higher availability in the event of an AP failure APs should not be placed too close together since clients will still transmit at normal power output Clients can c
14、ause interference issues with other APS and clients,Enterprise coverage & capacity,60 ft,802.11a:11-14 Mbps 802.11g:11-14 Mbps 802.11b/g:2 / 2-4 Mbps 802.11b:2 Mbps,Graphic is using only 3 channels to show option to avoid interference,确定AP数量和位置Z Factor,Z factor allows conversion of an AP coverage ar
15、ea to square footage Together with the building type and average desired user performance, the Z factor calculation can quickly estimate the number of required APs,Increased signal strength means greater throughput limited by signal standard 802.11a will have increased throughput over a wider range
16、than 802.11b,Z FactorPremise,Average Signal,Z FactorBuilding Reference,Z FactorAP 数量,Next define the coverage area for each floor in the building Divide into rectangles, then calculate APs needed by dividing the area of each rectangle by the Z factor squared,Example is for a typical office building
17、with a desired average user throughput of 5 Mbps,Due to the gain of an Cisco 1000 series AP, 10% more AP should be added from a given calculation,Z FactorAP 位置,Place the AP in the center of the coverage areas,Example is for omni directional antenna,Due to the gain of an Cisco 1000 series AP, AP shou
18、ld be staggered to accommodate coverage area shape,确定AP数量和位置Site Survey,More rigorous method to determine AP count and placement Z Factor calculation can be used to determine AP count while Site Survey can be used for actual AP placement Requires measurement of actual coverage areas to determine cor
19、rect placement,Site SurveyOverview,Cisco 1000 series APs are configured for site survey mode First AP is placed at a zero/zero coordinate and then the Ekahau Site Survey Tool is used to determine coverage boundary Then place AP on coverage boundary in the middle of the coverage area Then use Ekahau
20、Site Survey Tool to determine new coverage boundary Then place additional AP with RF coverage areas adjacent to placed AP Then use Ekahau Site Survey Tool again to determine additional coverage boundaries A single set of Cisco 1000 series APs can be moved to different locations on the building floor
21、 until all AP placement is defined Ekahau Site Survey tool should be used to verify the final AP placement and document the WLAN,Site SurveyCisco 1000 series AP Site Survey Mode,Requires opening of Cisco 1000 series AP and setting of internal jumper Requires powering of Cisco 1000 series AP In site
22、survey mode, the Cisco 1000 series AP is beacon only device and will not support data or monitoring services In site survey mode, the Cisco 1000 series AP Transmit power is 18 dBm for 802.11a on channel 52 Transmit power is 19 dBm for 802.11b on channel 11 In site survey mode, the Cisco 1000 series
23、AP power LED will flash green Site survey mode will not support external antenna Site survey mode is used exclusively for site surveys or troubleshooting,Site SurveyCisco 10 xx series AP Site Survey Mode (continued),You must first open the cover by removing the screws at the base of Side A with a T-
24、10 security Torx,Cisco 1000 series AP Site Survey Mode requires a physical configuration,Then you must open the cover and jumper the Site Survey pins 1 & 2,Site SurveyCisco 10 xx series AP Site Survey Mode (continued),Cisco 1000 series AP Site Survey Mode requires a power source,Site SurveyAP 数量和位置,
25、Place the AP at 0:0 coordinate of a coverage area (1). Perform a site survey to determine the signal strength of the coverage area. Mark where the rate falls to the minimum acceptable value until you have traced a semi-circular pattern on the floor which will determine the coverage boundary. Move th
26、e original AP to a centrally located position on the coverage boundary (2) to create the first coverage area.,Site SurveyAP 数量和位置 (continued),Perform a site survey to determine the signal strength of the new coverage area. Mark where the rate falls to the minimum acceptable value until you have traced a circular pattern on the floor which will determine the coverage bound
温馨提示
- 1. 本站所有资源如无特殊说明,都需要本地电脑安装OFFICE2007和PDF阅读器。图纸软件为CAD,CAXA,PROE,UG,SolidWorks等.压缩文件请下载最新的WinRAR软件解压。
- 2. 本站的文档不包含任何第三方提供的附件图纸等,如果需要附件,请联系上传者。文件的所有权益归上传用户所有。
- 3. 本站RAR压缩包中若带图纸,网页内容里面会有图纸预览,若没有图纸预览就没有图纸。
- 4. 未经权益所有人同意不得将文件中的内容挪作商业或盈利用途。
- 5. 人人文库网仅提供信息存储空间,仅对用户上传内容的表现方式做保护处理,对用户上传分享的文档内容本身不做任何修改或编辑,并不能对任何下载内容负责。
- 6. 下载文件中如有侵权或不适当内容,请与我们联系,我们立即纠正。
- 7. 本站不保证下载资源的准确性、安全性和完整性, 同时也不承担用户因使用这些下载资源对自己和他人造成任何形式的伤害或损失。
最新文档
- 农村购买小屋合同范本
- 储存罐购买合同协议书
- 绿茶儿茶素减脂胶囊企业制定与实施新质生产力项目商业计划书
- 美容会所会员忠诚度企业制定与实施新质生产力项目商业计划书
- 绘画用画布固定器行业跨境出海项目商业计划书
- 社区儿童才艺展示与比赛创新创业项目商业计划书
- 介绍项目合作协议合同
- 保密协议书范本照模板
- 出口蔬菜供应合同范本
- DB63-T 1502-2016 牦牛种牛标识和建档立卡规程
- 类风湿关节炎的中医治疗演示文稿
- 食品安全BRCGS包装材料全球标准第六版管理手册及程序文件
- 热工保护联锁投退管理规定
- (中职)旅游概论第四章 旅游业课件
- JJG 700 -2016气相色谱仪检定规程-(高清现行)
- 齐鲁医学可用于普通食品的新资源食品及药食两用原料名单
- GB∕T 12234-2019 石油、天然气工业用螺柱连接阀盖的钢制闸阀
- 礼堂舞台机械灯光、音响扩声系统工程设计方案
- 政务礼仪-PPT课件
- 三黄丸_千金卷二十一引巴郡太守方_方剂加减变化汇总
- 部编版语文五年级上册--第五单元习作单元教材材解读和教学目标课件
评论
0/150
提交评论