04-06-2012, 02:25 PM
Secure Network Coding for Multi-Resolution
Wireless Video Streaming
[attachment=24166]
Abstract
Emerging practical schemes indicate that algebraic
mixing of different packets by means of random linear network
coding can increase the throughput and robustness of streaming
services over wireless networks. However, concerns with the
security of wireless video, in particular when only some of the
users are entitled to the highest quality, have uncovered the
need for a network coding scheme capable of ensuring different
levels of confidentiality under stringent complexity requirements.
INTRODUCTION
WHILE there has been abundant research aiming at
ensuring a reasonable quality of video experience
for wireless users, the task of providing video streaming
of variable quality to a heterogeneous set of receivers with
different subscription levels is still an open issue. The key
challenge is to serve wireless users with video streams that are
both (i) of different quality, depending on subscription level,
and (ii) with security guarantees to ensure that only authorized
users will access the protected video streams.
Wireless Video Performance
We evaluate the performance of the protocol described
in Section IV in the multi-hop multi-path scenario from Fig. 1,
in which the server S sends video to 3 heterogenous receivers
A,B and C, through relays R1,R2 and R3, over lossy wireless
links. In this section we will focus solely on the performance
of the scheme in terms of throughput and robustness to losses,
and its ability to deliver quality video to a heterogeneous set
of receivers.
CONCLUSIONS AND FURTHER WORK
We presented a practical scheme for scalable video streaming
that exploits the algebraic characteristics of Random
Linear Network Coding. On the one hand our proposal ensures
differentiated levels of security for distinct users. On the other
hand, the properties of the network coding paradigm assure the
resilience to packet losses over wireless channels.
Wireless Video Streaming
[attachment=24166]
Abstract
Emerging practical schemes indicate that algebraic
mixing of different packets by means of random linear network
coding can increase the throughput and robustness of streaming
services over wireless networks. However, concerns with the
security of wireless video, in particular when only some of the
users are entitled to the highest quality, have uncovered the
need for a network coding scheme capable of ensuring different
levels of confidentiality under stringent complexity requirements.
INTRODUCTION
WHILE there has been abundant research aiming at
ensuring a reasonable quality of video experience
for wireless users, the task of providing video streaming
of variable quality to a heterogeneous set of receivers with
different subscription levels is still an open issue. The key
challenge is to serve wireless users with video streams that are
both (i) of different quality, depending on subscription level,
and (ii) with security guarantees to ensure that only authorized
users will access the protected video streams.
Wireless Video Performance
We evaluate the performance of the protocol described
in Section IV in the multi-hop multi-path scenario from Fig. 1,
in which the server S sends video to 3 heterogenous receivers
A,B and C, through relays R1,R2 and R3, over lossy wireless
links. In this section we will focus solely on the performance
of the scheme in terms of throughput and robustness to losses,
and its ability to deliver quality video to a heterogeneous set
of receivers.
CONCLUSIONS AND FURTHER WORK
We presented a practical scheme for scalable video streaming
that exploits the algebraic characteristics of Random
Linear Network Coding. On the one hand our proposal ensures
differentiated levels of security for distinct users. On the other
hand, the properties of the network coding paradigm assure the
resilience to packet losses over wireless channels.