hybrid video streaming over mobile networks
TRANSCRIPT
HYBRID VIDEO STREAMING OVER
MOBILE NETWORK
Presented By :
VISHNU K N (AMAMEEC062)ELECTRONICS & COMMUNICATIONAL-AMEEN ENGINEERING COLLEGE
INTRODUCTION
Market research shows that video streaming currently
represents more than 50% of the mobile internet traffic
and this fraction will increase to 72% by 2019.
VIDEO STREAMING OVER MOBILE NETWORKS
1. UNICAST SERVICE
2. MULTICAST SERVICE
UNICAST SERVICE
Current cellular networks mostly provide Unicast service.
UNICAST SERVICE
Base station may setup a unicast connection to each mobile devices using the best MCS mode.
Transmitting at higher MCS mode allows the mobile device to receive at higher data rates.
Unicast service consumes excessive mobile network resources.
MULTICAST SERVICE
It concurrently delivers a live video stream to all interested
mobile users.
MULTICAST SERVICE
Multicast is effective for serving many users watching the same video.
Multicast maximize the number of served users without consuming excessive network bandwidth.
Each video is transmitted with the MCS mode suitable to the mobile devices with worst channel conditions.
MULTICAST SERVICE
1). Independent Cell Network
Neighboring cells operate without coordination
2). Multi cell Single Frequency Network
Several neighboring cells synchronously transmit
identical signals to all mobile devices in those cells.
HYBRID VIDEO STREAMING
Unicast leads to higher network load, but lower energy consumption.
Multicast results in lower network load, but higher energy consumption.
Concurrently utilize unicast and multicast for minimizing
the energy consumption as well as load on cellular network.
HYBRID VIDEO STREAMING
HYBRID VIDEO STREAMING ALGORITHMS
Independent Cell Networks
1. SCOPT (Single Cell OPTimum)
2. SCG (Single Cell Greedy)
Multi Cell Single Frequency Network
1. SFNOPT (Single Frequency Network OPTimum)
2. SFNG (Single Frequency Network Greedy)
SYSTEM MODEL
SYSTEM MODELALLOCATION WINDOW
A pair of t [1,T] and s [1, S] uniquely determines a resource block∈ ∈
SYSTEM MODELSYMBOLS USED
The optimal allocation
1. The average energy saving across all mobile devices is maximized.
2. No more than dTS blocks are consumed by the on demand streaming service.
3. All mobile devices watching video v receive at rate rv for smooth play out.
MATHEMATICAL FORMULATION
Number of mobile devices
Wv,m,z ( v Є [1,V], m Є [1,M], z Є [1,Zv] )
Wv,m,z = 1 ; unicast
Wv,m,z >1 ; multicast
MATHEMATICAL FORMULATION
Boolean Decision variable
Xv,m,z ( v Є [1,V], m Є [1,M], z Є [1,Zv] )
Xv,m,z = 1 ; mode m
Xv,m,z =0 ; otherwise
Intermediate Boolean variable
Yv,m,n,z ( v Є [1,V], m,n Є [1,M] n<m, z Є [1,Zv] )
Yv,m,n,z = 1 ; mode n
Yv,m,n,z =0 ; otherwise
MATHEMATICAL FORMULATION
(3a) is to maximize the average energy saving.(3b) ensures that the on-demand streaming service only consumes up to network resources.(3c) guarantees that every mobile device receives its allocation window at a feasible MCS mode.
SCG ALGORITHM
SCG ALGORITHM
PERFORMANCE
High energy saving
Serve large number of mobile users
More elastic than unicast and multicast only approaches
PERFORMANCE
Service Ratio
Spectral Efficiency
Energy Saving
Video Quality
Frame Loss Rate
Initial Buffering Time
Number Of Re-buffering Events
CONCLUSION
Discussed the resource allocation problem for large scale
video streaming over cellular networks and algorithms to
utilize both unicast and multicast.