doc.: ieee 802.11-05/0109r0 submission march 2005 brian ford, bellsouthslide 1 service provider...
TRANSCRIPT
March 2005
Brian Ford, BellSouth
Slide 1
doc.: IEEE 802.11-05/0109r0
Submission
Service Provider Requirements for 802.11n Detailed
Notice: This document has been prepared to assist IEEE 802.11. It is offered as a basis for discussion and is not binding on the contributing individual(s) or organization(s). The material in this document is subject to change in form and content after further study. The contributor(s) reserve(s) the right to add, amend or withdraw material contained herein.
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Date: 2005-03-16
Name Company Address Phone email Brian Ford BellSouth 725 West Peachtree
Room 7A43 Atlanta, GA 30308
(404) 986-9631 [email protected]
Charles Cook Qwest 1801 California Street 26th Floor Denver, CO 80027
(303) 896-5652 [email protected]
Authors:
March 2005
Brian Ford, BellSouth
Slide 2
doc.: IEEE 802.11-05/0109r0
Submission
Abstract
This document expands on presentation 11-05-1644-01-000n. This document provides areas within 802.11 that must be considered as to market impact of weaknesses in 802.11 standard definition. The primary focus is 802.11n as this enables a true wireless high throughput triple play. An 802.11n that does not address the issues presented will have a negative impact on Service Providers, the primary link in high throughput applications. Resolving the weaknesses should be considered as a major component of achieving “Broad Market Potential” and a truly “market-enabling standard.”
March 2005
Brian Ford, BellSouth
Slide 3
doc.: IEEE 802.11-05/0109r0
Submission
List of Contributors/Supporters• John Egan, Infineon, [email protected]
• Fanny Mlinarsky, Azimuth Systems, [email protected]
March 2005
Brian Ford, BellSouth
Slide 4
doc.: IEEE 802.11-05/0109r0
Submission
Background slides
• Following slides recap needs presented in 11-05-1644-01-000n
• Summary of messages– Service Providers will be impacted by the standards weaknesses
– Service Providers deploy standards-based systems, systems that require non-standard functions to meet needs are unacceptable
– High Throughput APs and Stations will drive broad market acceptance and use of WLAN, placing SPs in a position to face consumer complaints over issues unresolved in the standards, and so unresolved in 802.11n-based systems
– SPs have specific concerns as listed
March 2005
Brian Ford, BellSouth
Slide 5
doc.: IEEE 802.11-05/0109r0
Submission
What do Service Providers need• Highest possible consumer satisfaction… if WLAN VoIP set doesn’t work
faultlessly consumers blame Service Provider or set provider, not 802.11n TG for missing something in the standard
• QoS is primary requirement – video and high throughput data sessions (possibly mobile)
• Streaming, high data rate video delivery, error free• Management capability to the devices• Improvements to Plug n Play (out of scope of 802.11n, but needs work as
consumers have no idea what to do)• Encryption• Mobility support
– Eliminate Doppler Effect– Handoff– Mesh– Tight integration with mobile services to support IMS/MMS
• Long Range with high data rate to enable outdoor to indoor 150m operation
March 2005
Brian Ford, BellSouth
Slide 6
doc.: IEEE 802.11-05/0109r0
Submission
Is Multi-Dwelling Support Possible?• Curb-side or pole mounted AP
• Few barriers (trees) in the way
• Approx 150m service radius to dwelling Point of Presence (Wireless NID inside closest wall)
• Similar to “Outdoor” simulation definition, yet different application
• Prefer to be able to transit through a house to far end - additional ~30m
• Want >>25M delivered to Wireless NID, what is possible?
• 150m determined by FCC as max. unbundling distance for FTTH/C
Single Family Unit
TreeTree
Curb side or polemounted AP
150m500 ft
30m/100 ft
March 2005
Brian Ford, BellSouth
Slide 7
doc.: IEEE 802.11-05/0109r0
Submission
Example of Requested Evaluation Points Signal Distance & Drop - Exterior
Exterior AP Landscape Exterior AP Overhead
Exterior Wall
Distance = D1
Width = D2
Distance = D2
Measuringdevice
Room 1
Distance = D1
Width = D2
Distance = D2
External AP
External AP
Composition and dB impact?
March 2005
Brian Ford, BellSouth
Slide 8
doc.: IEEE 802.11-05/0109r0
Submission
Example of Requested Evaluation Points Signal Distance & Drop - Interior
Interior AP OverheadInterior AP Landscape
Interior Wall
Distance = D1
Distance = D2
Measuringdevice
Distance = D2Distance = D1
Width = D2
Width = D2
Room 1 Room 2
Internal AP Internal AP
Room 2
Room 1Up to 6 walls?
March 2005
Brian Ford, BellSouth
Slide 9
doc.: IEEE 802.11-05/0109r0
Submission
Estimated Signal Drop Parameters for 2.4 GHz
• ~9 dB drop – Exterior Wall
• ~6 dB drop – Floor
• ~3 dB drop – interior (sheetrock) wall
• What is 5.8 GHz dB drop by wall/floor/exterior wall
March 2005
Brian Ford, BellSouth
Slide 10
doc.: IEEE 802.11-05/0109r0
Submission
Mesh/Hand-off
• If multiple APs in adjoining/overlapping areas…– Can one be a station of another (FTTCurb scenario, AP and
STB/AP are typical scenarios)• Repeater or another AP
– Can they be in a mesh configuration?– Can there be hand-off between them
• What are considerations if Yes– Errors– Data rate change– Security and how this is handled in a hand-off– Presumes is high probability mobility session so need to address the small
packet definition here as well or is in event of one AP failure and another taking over service
March 2005
Brian Ford, BellSouth
Slide 11
doc.: IEEE 802.11-05/0109r0
Submission
What this all nets out to…
• To meet Broadest Market Potential– Need to meet Service Provider needs, as they…
• Face the consumer in a high % of deployments
• Will drive up mass Station deployments through AP deployments
– Provide highest consumer satisfaction experience
– Plug the holes regarding mobile sessions, including hand-offs between APs and Mesh
March 2005
Brian Ford, BellSouth
Slide 12
doc.: IEEE 802.11-05/0109r0
Submission
Details
• TG efforts and standards to be evaluated as to changes needed to meet SP requirements
• Following slides cover individual issues with associated TG effort or standard
March 2005
Brian Ford, BellSouth
Slide 13
doc.: IEEE 802.11-05/0109r0
Submission
TG/Standards that Impact Service Providers
.11i enhancedsecurity
.11v networkmanagement
.11s MeshNetworking
.11e QOS MACenhancements
.11t performancetesting
.11r fast roaming.11k radio resource
measurment
OperatorRequirements .11nHigh Throughput
March 2005
Brian Ford, BellSouth
Slide 14
doc.: IEEE 802.11-05/0109r0
Submission
External AP reach into the home
Issue
Reach must be 150m with 20-25Mbps above the MAC measured within the home after signal penetration of "typical outside wall"
TGIssue/Resolution/Recommendation Comment
11n
Work to determine what is possible, reach is most important factor
11n
Determine use of Beamforming versus MIMO in this context
11n
Determine what is definition of outside wall and components of such Aluminum siding and foil faced insulation may be problematic
11n, 11e, 11tQoS to ensure confidence of service delivery
11n, 11r, 11i, 11s, 11k, 11v, 11t
Use of AP or repeater in the home to regenerate signal and provide coverage, enable hand-off from external to internal AP
r=fast roaming (between AP and repeater), i=security, s=mesh, k=resource measurement, v=network management, t=testing
March 2005
Brian Ford, BellSouth
Slide 15
doc.: IEEE 802.11-05/0109r0
Submission
Handoff (AP/AP/Repeater)
IssueHandoff between APs or between AP and repeater with no or minimal impact on station (ex. VoIP station crossing coverage areas)
TGIssue/Resolution/Recommendation Comment
11n, 11t, 11e, 11v, 11r, 11s, 11k
Agree on maximum allowed errors
11n
Differentiate between repeater and second AP (Mesh) as to topology and methodology of handoff
11n, 11t, 11e, 11v, 11r, 11s, 11k
Adjust appropriate definitions
11n, 11t, 11e, 11i, 11v, 11r, 11s, 11k
Pre-handoff authorization enabled to shorten handoff interruption time
March 2005
Brian Ford, BellSouth
Slide 16
doc.: IEEE 802.11-05/0109r0
Submission
Handoff (Mobile/AP)
IssueHandoff between AP and Mobile service with no or minimal impact on station (ex. Dual mode station crossing coverage areas while in a call or idle)
TGIssue/Resolution/Recommendation Comment
Agree on maximum allowed errors for call in progress
While on a Mobile call and shifting onto AP coverage, includes security, Mesh, fast handoff, identification, pre-handoff authorization
While on a WLAN call and shifting from AP to Mobile Carrier, includes security, Mesh, fast handoff, identification, pre-handoff authorization
Idle set on WLAN needs to send “I am available” message to Mobile Carrier periodically
AP must notify Mobile Carrier it is operational and able to make/take handoffs
March 2005
Brian Ford, BellSouth
Slide 17
doc.: IEEE 802.11-05/0109r0
Submission
RepeatersIssue Use of Repeaters in the home, including crossover repeaters between 2.4 and 5.8 GHz
TG Issue/Resolution/Recommendation Comment
11n Define repeater
11n
Determine data link between repeater and main AP and management of repeater by main AP
11n
Define radio spectrum use between repeater and main AP, and determine impact n throughput at repeater and main AP
May want reduced rate or reach at repeater to enable maximum rate/reach at main AP
11n, 11t, 11e, 11v, 11r, 11s, 11k
Frequency crossover management
11n, 11t, 11e, 11v, 11r, 11s, 11k
Define methodology of handoff between repeater and main AP, between repeater and other repeater (2 scenarios… on same main AP or other main AP), between repeater and other main AP
March 2005
Brian Ford, BellSouth
Slide 18
doc.: IEEE 802.11-05/0109r0
Submission
Video Transport Issues
IssueQoS mandated for High Data Rate applications (video primarily)
TGIssue/Resolution/Recommendation Comment
11n, 11e, 11t
Enable overair QoS to avoid artifacts in video session e=QoS enhancements, t=testing
11n, 11v, 11t
Manage LAN traffic to prevent impact of non-video related packets on video packets
t=testing, v=network management
March 2005
Brian Ford, BellSouth
Slide 19
doc.: IEEE 802.11-05/0109r0
Submission
Mobile Wireless LAN Station Support
Issue
Support for small, random packets in weak signal areas while station is mobile (WLAN SIP sets) to eliminate Doppler Effect
TGIssue/Resolution/Recommendation Comment
11n, 11t
Enable small packet support in standard use small packet device flag to AP as describer in 11-05-1644-01-000n
March 2005
Brian Ford, BellSouth
Slide 20
doc.: IEEE 802.11-05/0109r0
Submission
Handle a 2-way Mobile Video Session
IssueHow to handle mobile 2-way video session
TGIssue/Resolution/Recommendation Comment
11n, 11tDetermine packet types used
11n, 11tDetermine Doppler Effect for weak areas
11nDetermine how to handle
11n, 11t, 11r, 11s, 11k, 11v, 11i, 11e
Handle fast retransmit of lost packets in streaming video
11n, 11t, 11r, 11s, 11k, 11v, 11i, 11e
Use of 2 APs with this application 2 Stations embedded in one device?
March 2005
Brian Ford, BellSouth
Slide 21
doc.: IEEE 802.11-05/0109r0
Submission
Encryption
Issue
Encryption to meet Content Provider concerns
TG
Issue/Resolution/Recommendation Comment
11n
Determine what needs are
11n, 11i
Analyze needs versus existing standards
11n
Liaise with CPs to determine agreement on means to reach satisfactory results
11n, 11i
Incorporate changes
March 2005
Brian Ford, BellSouth
Slide 22
doc.: IEEE 802.11-05/0109r0
Submission
Distance Requirement
IssueMaximize in-home distance and then determine rate
TGIssue/Resolution/Recommendation Comment
11n, 11t
Define what are in--home disturbers on 1 floor and agree on these Suggest 6 walls between AP and furthest station at 33m. Microwave ovens, refrigerators, DECT/Wireless sets @ 2.4 and 5.8 GHz
11n, 11t
Determine multi-floor coverage possibilities 1 above and 1 below, dB impact of floors and then walls
March 2005
Brian Ford, BellSouth
Slide 23
doc.: IEEE 802.11-05/0109r0
Submission
Recommendations for Action
• Service Provider needs go beyond 802.11n
• 802.11n should be focal point as is “enabling standard”
• Requires liaison and inter-TG work to ensure complete resolution of issues– 802.11n should lead this
• 802.11n should down select then add this work as mandatory for TGn completion of its task
• WiMax not taken into account. Requires further study and decision if this is a valid focal point