Wireless Lan

Produktinformationen
Wireless Lan
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Beratung, eine kostenlose Teststellung oder
weitere Informationen?
kh.hoeschen@xnc.com
Tel.: 02203 – 96960
Mobil: 0174 - 9222144
XNC GmbH
Auf der Kaiserbitz 3
D-51147 Köln
Amtsgericht Köln HRB 25563
Geschäftsführer Frank Bergknecht
Installationen mit Meru’s
WLAN System
Meru Überblick
◆
Meru zielt auf zwei der derzeit am stärksten
IT Wachstumsmärkte —VoIP and Wireless
◆
Innovative Technologie
●
●
●
◆
Eliminiert die derzeit komplexe RF Planung
High performance, High density (Leistung und Dichte)
Liefert High-Quality wireless VoIP
Industrielle Auszeichungen
Die Industrie sieht derzeit Meru als
Branchenführer!
WLAN Architektur Evolution
“Stand Alone” or
“Fat” AP
LAN Switch
Aruba, Trapeze,
Extreme, Airespace
“Thin” AP
WLAN Switch
“Intelligent &
Coordinated” Edge
WLAN Switch
/ Controller
Architecture
Stand Alone APs,
Centralized or Distributed
Management
Centralized Intelligence
Overlay WLAN Network,
Distributed Intelligence,
Centralized Control
Benefits
Simple Implementation for
a Few Access Points,
Centralized Management
Scaleable, Central
Management
RF Coordination, Over-theAir QoS, Simple Deployment,
Scaleable, Management
Target
Markets
SOHO, Medium & Large
Enterprise
Medium & Large
Enterprise
Large Scale Enterprise
2005 – Unstrung Insider:
Enterprise VOIP Mobility Leadership
As of August, 2005
5 Top Equipment Makers Pick Meru for
Wireless VoIP Solution
VoIP Server
Handsets
Wireless LAN
+
+
+
Wireless / VoIP Security
Wi-Fi
Handset
Cellular/Wi-Fi
Dual-mode
Handset
Meru’s Unique Solution Advantages
Compared to Extreme’s WLAN
Better WLAN Performance
•
•
•
Predictable, fair service to all clients
Higher performance in dense user environments
Higher performance in mixed-mode 802.11b & 802.11g clients
Easy Deployment
•
•
Co-channel Interference Management
Reduced RF planning
Better Mobility/Roaming
•
Zero Handoff vs. Slow Handoff
Better QoS / VoWLAN Support
•
•
•
Over-the-air upstream and downstream QoS
Automatic voice flow detection (SIP, H323, SVP, SCCP)
Advanced Call-Admission Control, call load-balancing
and dynamic error correction capabilities
Meru Differentiation:
Air Traffic Control (ATC)
Functionality
Centralized Control
Benefits
Global Policies
Global Coordination
Central RF Intelligence
App Flow Inspection
Contention
Management
AP Intelligence
- QoS Flow Recognition
- Application Detection
- Local RF Coordination
- Admission Control
Co-Channel
Management
-
ATC MAC
- Local Governance
- Scheduling
- Virtual MAC for Clients
- 802.11 Control
Voice
Client
Performed in Controller
Performed in the Access Point
Jitter and
Bandwidth
Management
Zero Handoff
Air Traffic Control Technology
More Bandwidth For More Users
Active Users Per AP
100+
11
8
(Mbps)
Total Bandwidth at Peak
Peak Aggregate Throughput
Meru AP
Performance
5
1
Contention
Loss
20-25
Today’s AP
(others)
Performance
3
20-25
Number of Active Users
Others
Meru
Air Traffic Control Technology :
More Voice Calls
over-the-air
QoS
AP
Wired
QoS
Standards-based
Over-the-Air
QoS
AP
Wired
QoS
~High
Voice
Quality
~Low
AP+ Switch
standard Client
Data and voice typically on
Separate channels/network
MOS Score
4.0+
Meru AP &
Standard Client
Converged Network - voice
and data on same channels
Air Traffic Control Technology
Service Fairness
Throughput
Standard AP’s + 20 Clients
◆
◆
Throughput
1 Meru AP + 20 Clients
Industry leading aggregate throughput at density
Predictable, uniformly fair throughput across all
clients
●
Other AP’s erratic, unfair access over short term
intervals
Air Traffic Control Technology
Zero Loss Handoff
Other WLAN
Meru WLAN
Virtual Cell Architecture
BSSID = A
BSSID = B
01:00
100ms – 2 sec between handoff
BSSID = M
BSSID = M
00:00
No Handoff For Client
How Over-the-Air QoS Compares
Global RF Knowledge and
Inter-cell Coordination
Application Flow Detection
and Classification
Admission Control
Downlink (AP to Client)
Uplink (Client to AP)
“Others”
Meru
Air Traffic Control
--
Yes
Static ESSID-based or
Filters
Yes (Dynamic)
--
Yes
Simple Priority of
packets
Reservation-based
True over-the air QoS
--
Reservation-based
True over-the air QoS
Voice Services Module Further Improves
Users Experience
◆ Consists
●
●
●
of the following components:
Call Admission Control
Call Load Balancing
Dynamic Error Correction
Call Admission Control
◆ Enables
administrator to configure
system to allow a given number of
active calls
◆ Upon reaching limit, call can either be
rejected with Network Busy (similar to
PSTN) or can be moved to alternate
channel that has available resources
Call Load Balancing
◆
◆
◆
System can perform balancing of the data/voice
devices across multi-channel deployments in dense
networks.
Dynamically re-balance phones during call setup to
achieve peak call density in an area (3X other
vendors).
Allows you to paint an area with 3 channels to
achieve 3X call density allowing you to handle
common deployment situations where workers
congregate in a break area or conference room and
all place calls simultaneously.
Example Load Balancing Within a
VirtualCell
◆
◆
◆
After initial assignment,
AP1: 6 STA, AP2: 3 STA
Client signal re-evaluated
every 1 second and moved
to strongest AP within the
VirtualAP.
Data rate maximized by
assigning to AP with
strongest signal as clients
roam about.
AP1
Channel 1 VirtualCell
AP2
After Periodic Load Balancing
AP1
Channel 1 VirtualCell
AP2
Example Load Balancing Across two
VirtualCells
◆
◆
After initial assignment,
AP1: 7 STA, AP2: 3 STA
AP3: 4 STA, AP4: 6 STA
Within each VirtualAP,
the client signal is reevaluated over time and
moved to strongest AP
within the VirtualAP
(refer to slide 12).
Example Settings:
Max Stations per AP = 7
Max Stations per VirtualAP = 10
AP1
AP3
Channel 1 VirtualCell
AP2
Channel 6 VirtualCell
AP4
Dynamic Error Correction
◆ System
monitors voice flow and when
loss is detected due to outside
interference, corrects the loss by
interpolating the voice sample.
◆ Preserves voice quality when
errors/loss occurs.
Dynamic Error Correction
Example
Voice Signal Without DEC
RTP voice sample lost
Voice Signal With DEC
Meru Eliminates Trade-Off Between Backward
Compatibility and 802.11g Throughput
Critical in Voice Client (b) + Data Client (g) Deployments
UDP
1g
TCP
1g
(with b clients present)
(with b clients present)
~22.6
TCP
1g +1b
g client perf.
~10.1
~15.8
~10.3
~14.8
~3.4
Others
Meru
Source: Meru Lab Tests
Others
Meru
Others
Meru
Comparative Results
Density: >3X better
Meru
Other Leading AP/WLAN Systems
128 clients/AP
~ 15 clients/AP
Fairness:
only product with time fairness
Throughput:
50% better in bg
UDP (bg mode) 22.6Mbps
14.8Mbps
TCP (bg mode) 17.5Mbps
10.9Mbps
Handoff: 10X – 150X better
Spectralink
QoS Call Capacity
First truly
converged
WLAN
Chariot VoIP
30 calls
Convergence
6 calls + 6
data
2.19ms (in Virtual AP mode)
50ms – 3000ms
10 calls/AP; works even with data
clients loaded
MOS up: 4.22
MOS Down: 4.26
MOS: 4.26
Data T’put: 5.6Mbps
8-9 calls/AP in unloaded AP;
breaks with 2 – 3 data clients
downlink
MOS up: 1.58
kills uplink
MOS Down: 4.29
4 calls did not completedata kills
2 calls MOS 1.5
voice
Data T’put: 7Mbps
Meru Has Significant Performance Advantage
in Requirements for WLAN Deployments
Aruba*
Trapeze*
Open
1000-3000**
1000-3000**
1000-3000**
WPA
2000
8000 – 9000
2000 ms
802.11g client
throughput, in
presence of b
clients
10.9 Mbps
7.6 Mbps
10.9
17.5 Mbps
1.5X
Density of data
Clients
~15-20
~15-20
~15-20
128
5X
Handoff
(ms)
* Magazine Tests
** Depends on client card capabilities
Meru
Meru
Advantage
Airespace*
No Client
Handoff
(2 ms
switchover in
backend)
50 – 150X
100 – 400X
Customer Examples
Hyatt Osaka Hotel
Data and Voice Deployment
Floor 39
Floor …
◆
28 Floors + Conference
Center
Floor 5
Managed
IP Centrex
Service
Provided By
VoIP Service
Provider
PDAs
Floor 4
◆
◆
◆
Wireless Data access
for guests
Floor 3
VoWLAN handsets
for internal staff
communications
VoIP carrier providing
services
WAN
WiFi
Phones
Conference Floor
Data Center
Meru
Controller
University of Miami Hospital
Data Application and Voice
◆
Largest Healthcare system in
Southeast with 6000 member
community
◆
Multiple applications – data,
voice, PDA, medical carts,
laptops
◆
Meru Benefits:
●
“Meru delivered an easily managed, future-proof
system at a significant cost savings. Its standardscompliant solution supports Quality of Service for
real-time applications, single channel operations
for co-channel interference mitigation, and the
ability to seamlessly integrate with our existing
backend infrastructure and security processes.”
- Chris Bogue, IT Director
●
●
Ease of deployment
Reduced costs
Predictable service with
over-the-air QoS
Meru Selected For World's Largest FMC
Deployments: Validating Meru’s VoIP Wireless
Leadership Position
◆ Osaka
●
●
●
$9B Revenue
50 Offices: 6000+ DoCoMo Dual Mode Phones
Competed with Cisco, NEC and others
◆ Large
●
●
●
Gas: Large Utility
Construction Company
US$18B annual revenues
Nationwide in Japan, offices in Asia, US, UK
9000+ Dual Mode Phones
Live Shots
Live Shots
Danke / Thank you