05-09-2012, 03:13 PM
i am an m.tech student
i want documentation and ppt of Secure Communications Over Wireless Broadcast Networks: Stability and Utility Maximization.
i have only anstract
Abstract—A wireless broadcast network model with secrecy constraints is investigated, in which a source node broadcasts confi-
dential message flows to user nodes, with each message intended
to be decoded accurately by one user and to be kept secret from all
other users (who are thus considered to be eavesdroppers with regard to all other messages but their own). The source maintains a
queue for each message flow if it is not served immediately. The
channel from the source to the users is modeled as a fading
broadcast channel, and the channel state information is assumed
to be known to the source and the corresponding receivers. Two
eavesdropping models are considered. For a collaborative eavesdropping model, in which the eavesdroppers exchange their outputs, the secrecy capacity region is obtained, within which each
rate vector is achieved by using a time-division scheme and a source
power control policy over channel states. A throughput optimal
queue-length-based rate scheduling algorithm is further derived
that stabilizes all arrival rate vectors contained in the secrecy capacity region. Moreover, the network utility function is maximized
via joint design of rate control, rate scheduling, power control, and
secure coding. More precisely, a source controls the message arrival rate according to its message queue, the rate scheduling selects a transmission rate based the queue length vector, and the
rate vector is achieved by power control and secure coding. These
components work jointly to solve the network utility maximization
problem. For a noncollaborative eavesdropping model, in which
eavesdroppers do not exchange their outputs, an achievable secrecy rate region is derived based on a time-division scheme, and
the queue-length-based rate scheduling algorithm and the corresponding power control policy are obtained that stabilize all arrival rate vectors in this region. The network utility maximizing
rate control vector is also obtained.
so pls send me documentation and ppt as soon as possible
thank you..