1. Managed and un-managed Wireless LANs
November 14, 2018
Managed and un-managed Wireless LANs
Date:
Authors:
Xiaojun Ma, Thomson Inc.

2. November 14, 2018
Abstract
This contribution describes the differences of the managed and un-managed Wireless LANs; and presents their implications on VTS SG PAR scope definitions.
Xiaojun Ma, Thomson Inc.

3. Variations in Wireless LAN environments
November 14, 2018
Variations in Wireless LAN environments
Various physical setups:
in-door/out-door
home/enterprise
big/small coverage
Various service setups:
data-only / triple-plays
free / pay services
large / small user groups
Xiaojun Ma, Thomson Inc.

4. Technical view of WLAN variations
November 14, 2018
Technical view of WLAN variations
Managed WLANs
Having exclusive right to the hotspots
Network planning to avoid interference from BSS overlapping
Channel selection
Power control
Smart antenna – beam forming
AP collaboration
Examples: big public hotspots, stadium, airport, some enterprises
Unmanaged WLANs
Having no exclusive right to the hotspot or its neighborhood areas
Network planning is automatic and/or policy based
Interference exists
Coverage is varying from location to location (user number and area size)
Examples: home, small hotspots, e.g. Starbucks
Xiaojun Ma, Thomson Inc.

5. Managed WLANs Features Requirements Approaches
November 14, 2018
Managed WLANs
Features
Interference is insignificant
Wall crossing is not a big issue
Fading and multipath may be still significant
Requirements
Scalability and bandwidth efficiency are crucial as the number of users is big
QoS control is crucial as video content should be stably offered
Approaches
Broadcast/multicast is required for scalability
Multicasting video preempt data may be required (just diffserve is not enough)
Xiaojun Ma, Thomson Inc.

6. Unmanaged WLANs Features Requirements Approaches
November 14, 2018
Unmanaged WLANs
Features
Interference is significant as there are many contributors, such as neighbour WLANs, Microware owen, cordless phone etc…
Wall crossing and blind spots are big issues
Fading is insignificant
Requirements
Scalability and bandwidth efficiency are minor
QoS control is important for triple-play
Interference avoidance
Approaches
Uni-casting may be used at link layer
Diffserv may be good enough to support QoS of video part
Xiaojun Ma, Thomson Inc.

7. Suggestion on PAR scopes
November 14, 2018
Suggestion on PAR scopes
Change #3
Increased robustness in overlapping BSS environments, based upon enhancing existing mechanisms without the requirement for a centralised management entity. To
Increased robustness in overlapping BSS environments
Leaving rooms for possible centralized solution (managed network) or policy based collaboration solution (un-managed network)
Xiaojun Ma, Thomson Inc.