Managed and un-managed Wireless LANs November 14, 2018 Managed and un-managed Wireless LANs Date: 2007-12-17 Authors: Xiaojun Ma, Thomson Inc.

November 14, 2018 Abstract This contribution describes the differences of the managed and un-managed Wireless LANs; and presents their implications on 802.11 VTS SG PAR scope definitions. Xiaojun Ma, Thomson Inc.

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.

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.

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.

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.

Suggestion on PAR scopes November 14, 2018 Suggestion on PAR scopes Change #3 Increased robustness in overlapping BSS environments, based upon enhancing existing 802.11 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.