1. From mobile TV applications to VTS PAR Scopes
November 2007
doc.: IEEE /2752r1
February 24, 2019
From mobile TV applications to VTS PAR Scopes
Date:
Authors:
Jun Li, Thomson Inc..
Peter Ecclesine, Cisco Systems

2. November 2007
doc.: IEEE /2752r1
February 24, 2019
Abstract
This submission is a discussion on VTS SG PAR Scope based on Thomson’s research experience on mobile TV (DVB-H) extension to WiFi networks
Jun Li, Thomson Inc..
Peter Ecclesine, Cisco Systems

3. Outlines Features of mobile TV extension to WiFi
November 2007
doc.: IEEE /2752r1
February 24, 2019
Outlines
Features of mobile TV extension to WiFi
Requirements of mobile TV extension to WiFi
Approaches we used
Implications on VTS PAR Scope
Jun Li, Thomson Inc..
Peter Ecclesine, Cisco Systems

4. Features of mobile TV extension to WiFi networks
February 24, 2019
Features of mobile TV extension to WiFi networks
Motivations
Mobile TV (such as DVB-H) has coverage limitation
More WiFi terminals are available
WiFi infrastructure exists already
Advantages
Coverage extension (in-door, rural area, more terminals)
Program dynamics, it can multiplex
Local programs at hotspots
Programs from different service operators
Application rich because of pure IP and back channel availability
Low cost (using existing infrastructure and sharing with other apps)
Disadvantages
Channel quality and bandwidth variation due to environment and interference
Jun Li, Thomson Inc..

5. Requirements of mobile TV extension to WiFi networks
February 24, 2019
Requirements of mobile TV extension to WiFi networks
Basic
Scalability on number of users (Multicasting)
Multiple programs (Multiplexing)
Power-saving on mobile terminals
Fast channel change
Special
Sharing with other applications (web data, VOIP)
Dynamics on coverage areas (number of users)
Dynamics on bandwidth availability (walls, interference)
Jun Li, Thomson Inc..

6. Approaches Multicasting with channel coding at application layer
February 24, 2019
Approaches
Multicasting with channel coding at application layer
Traffic control for downlink
Dynamic Re-multiplexing with admission control
Use managed network
Apply certain AP collaboration policy for un-managed networks
Jun Li, Thomson Inc..

7. Issues in current 802.11 standard
February 24, 2019
Issues in current standard
Weak multicasting support
No link rate adaptation
No feedback mechanism
No per session power-saving
Weak QoS support
Cannot give multicasting priority over uni-casting
Cannot give delay boundary
Cannot adapt to interference / bandwidth availability
QoS classification is too coarse
Jun Li, Thomson Inc..

8. Implications on PAR topics
February 24, 2019
Implications on PAR topics
Link adaptation
Cross-layer API for multicasting rate selection and report on AP
Per session/frame rate selection capability?
QoS control
EDCA extension : giving priority to
AP, multicasting traffic
Differentiation inside video class (such as SVC)
HCCA simplification
Delay boundary awareness
Feedback API to upper layer
BER,
Packet loss,
Power level in use etc…
Overlapping BSS
AP collaboration in managed networks (AP controller function?)
Interference awareness in unmanaged networks
Jun Li, Thomson Inc..

9. Suggestions to PAR scopes
February 24, 2019
Suggestions to PAR scopes
Change #4
Modified EDCA timing and parameter selection for video transport To
Modified EDCA and/or simplified HCCA for video transport
Change #5
Asynchronous multicast streaming independent of power save modes employed by associated stations.
Enhanced multicast streaming with QoS, power-saving capabilities
Jun Li, Thomson Inc..