如何在學校善用 " 企業級別 " 無線網絡方案 講者 Mr Heneith Wun 溫希達先生系統工程師 Proxim Mr Jonathan Mak 麥劍豪先生營業經理電訊盈科
Education Connectivity Challenges
Education Connectivity Challenges Technology between Residential Gateway VS Enterprise Access Points > Price VS Performance > More qty of access points = Best performance/ Worth to invest Easy/ convenient to use by teachers on lessons > Mobile learning notebooks at classroom, anywhere at schools > Number of concurrent users (teacher & class of students) Large Mobile Population > Increase demand on connectivity & mobility of computer users Competitive Environment > Growing use of computers in education (Digital school bag, etc.) > Video streaming of bandwidth demanding > Flexibility for future challenge of education
Education Connectivity Challenges Existing Properties & Old Infrastructures > Difficult to wire environment (Trucking, etc.) > High installation cost on fixed network (Price, time & influence, etc. ) Decentralized Facilities & Large Physical Campuses > Connections in campus areas (Classrooms, hall & playground, etc.) > Connections between buildings and facilities > Connectivity in temporary infrastructures / events
Wireless solution to meet the challenges
Wireless - A Solution to Education Networking Challenges Removes wiring challenges > Limited connections to users > Perfect for facilities where cost of wiring is prohibitive or impossible > Able to redeploy with minimal expense Low Installation Cost Fast installation, Less Influence > Connect permanent or temporary campus buildings quickly and easily Large coverage, High Performance > Up to 108Mb transmit rate with satisfactory coverage High Flexibility & Mobility > Increase productivity > Ideal for class activities (Games, field trips & group discussions, etc.)
Design of Campus Wireless Network
Problems on Wireless Campus Network in Pilot Schools Access Point Reboot when No. of Users Increase No Support and Upgrade Capacity for Access Points Weak Signaling & Insufficient Transfer Rate Dissatisfied Performance in Video Applications Limited Coverage in Required Areas Problems on Roaming & Load Balance Unstable Performance on Wireless Connectivity Interference between Access Points Design of Campus Wireless Network
Design of Campus Wireless Network Coverage vs. Performance Classrooms for Senior Students Solution with High Performance in Focused Areas Special Function Room Staff Room Assembling Hall Main Building ORiNOCO AP-4000 Access Point (With 802.11a/b/g Radio) ORiNOCO AP-600g Access Point (With 802.11b/g Radio) 802.11a Coverage 802.11b/g Coverage
Design of Campus Wireless Network Coverage vs. Performance Solution with Priority on Wireless Connectivity Assembling Hall Main Building ORiNOCO AP-600g Access Point (With 802.11b/g Radio) 802.11b/g Coverage
A Mobile Computer Lab. A Flexible Solution to Schools with Limited Computer Resources Good for Junior Students with Less Usage of Computers in Class Fit for Special Activities (Sports Day, etc.) Wireless Laptops on a Cart provides Mobile Computer Lab To Network
Coverage, Performance & Load Balancing Scenario I Room 1 Room 2 Scenario II Room 1 Room 2 Client devices distribute evenly over the available (overlapping) cells and make better use of the overall capacity of the WLAN system Overlapping cells > Double the capacity of an area Classrooms Room 3 Room 4 Room 5 Classrooms Room 3 Room 4 Room 5 > Create fault tolerant infrastructure Clients base association decision not only on quality of the link to the AP but also on the load of the cell > Drive client to connect to AP with the most available bandwidth Benefit: Quality Connection > More efficient use of infrastructure; drive cost down Marginal Connection
AP Density Setting for Mixed Cell Size Installations Control cell size not by yelling louder but by setting listening capabilities, allowing mixed cell size installations, e.g.: > Classrooms with high density, small cells, allowing high capacity > Assembling Hall with low density, large cells Benefit: Assembling Hall Public Areas Classrooms > More efficient use of infrastructure and drive cost down > Limits access to unnecessary areas / undesirable users > Overall improved capacity
Wireless Distribution System Achieves Complete Connectivity Solution for complete connectivity in tough / unwired environment WLAN Coverage WDS Link > Create Wi-Fi cells in difficult to wire locations / temporary sites > For indoor (Rooms) and outdoor (Campus Buildings) Indoor Solution Outdoor Solution WLAN Coverage Up to 6 WDS links supported in each AP Enterprise Class AP > Better Hardware Specification (CPU & Memory) for Quality Performance (Both WDS Link & WLAN Client Connections) Available in 802.11a,.11b &.11g mode Maximize your choice on network performance
VLAN Support Enables Traffic Segmentation User VLANs segment wireless population into groups > Example: Allows safe access for Teachers, Staffs, Students and Guests through single wireless infrastructure > Interoperable with all security modes: WEP, WPA & 802.1x > Multiple VLAN with multiple security setting Management VLAN increases security of AP > Management station must be on the Management VLAN to change AP settings VLAN ID 1 (E.g. For Teachers Use) 802.1x 802.1x VLAN Enabled Access Point VLAN ID 2 AP Management (SNMP, Web or CLI) 802.1x (E.g. For Students Use) WEP WEP WEP WEP 2 User VLANs Segmented on Wireless LAN side of Network (E.g. Teachers & Students)
Enterprise Class Wireless Networking Solution (A Solution for Education and Enterprise Deployments)
Enterprise Class Access Points Security Performance Coverage ORiNOCO AP-600 Access Point ORiNOCO AP-700 Access Point ORiNOCO AP-4000 Access Point
Comprehensive Security IEEE 802.11i/WPA2 >.11X authentication with key rotation (EAP-TLS, TTLS or PEAP) Mutual authentication between client and network > AES provides strongest encryption of data over the air > Multiple VLAN support Secure management interfaces (SNMPv3, SSL) Rogue AP detection in all bands (5 GHz, 2.4GHz) > Threat: employee installs unsecure, consumer, tri-mode AP > Continuous beacon request over every channel > Collects, stores, and forwards MAC, SSID, etc. for both APs and clients > Information passed to network management for inventory verification and action, offloading manual detection from IT Manager
Enterprise Class Features Invest in tri-mode APs to avoid costly hardware upgrades later > Simultaneous 802.11b/g and 802.11a radios > Investment protection for new wireless applications, more users and a/b/g Centrino-based devices > 802.11a offers more performance for improved data and voice Check for sufficient memory and processing power > Allows for new standard updates (I.e. 802.11i, 802.11e) > New features and capabilities Intrusion detection and prevention Self healing network Integrated cellular / Wi-Fi voice support
Enterprise Class Features IEEE 802.11e Quality of Service > Enhances performance of video and voice applications > Allows prioritization over the air interface 802.1p and 802.1q > Necessary for mapping over-the-air performance to wired infrastructure Pre-authentication and fast roaming > Allows latency sensitive devices to roam without significant delay > Intelligently pre-authenticates devices on surrounding APs where likely to roam
Proxim Delivers Next-Generation WLAN Total Solution Comprehensive wireless hardware and software solution Compatible with ORiNOCO Enterprise Class Access Points > ORiNOCO AP-600, AP-700 & AP-4000 Access Point Intelligent wireless software technology on APs > RF Aware > Upgradeable to Motorola/Avaya/Proxim Seamless Mobility solution Active security and management software suite > Proactive planning > Threat detection and isolation > Administration and security Management Monitoring Security
End of Presentation