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Mobile wireless communication is susceptible to signal blockage, which is loss of signal, typically due to physical obstruction, over a longer duration relative to fading. Measurements indicate that blockage has a significant impact on reliability in both open and rural areas. Reliable multicast, a transport layer mechanism, attempts to gain networ...
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... mechanisms to extend blockage to the general case of multiple receivers have been considered. The first and conceptually simplest is a double Markov model show in Fig. 3. The blockage Markov model for a single receiver is encapsulated within each state of a double Markov model. The leftmost state is a common blockage model shared by all receivers while the rightmost state is the individual model unique to each receiver. The dc parameter impacts the degree to which receivers are correlated. In Fig. 4, ...
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Citations
Real-time traffic will be a predominant traffic type in the next generation networks, and networks with 100% reliability and
availability will be required by real-time premium traffic. It is believed that QoS guarantees could be better provided by
connection oriented networks such as Multi Protocol Label Switching (MPLS). These connection oriented networks are more vulnerable
to network failure. Conventional path protection methods perform re-routing to cope with this. However, re-routing always
causes packet losses and results in service outage. These losses are bursty in nature and highly degrade the QoS of the real-time
premium traffic. Thus, 100% availability cannot be achieved by conventional methods. The novel path protection proposed in
this paper recovers the bursty packet losses due to re-routing by using forward error correction (FEC) path. Therefore, it
can provide network architecture with no service outage for such traffic. The numerical results show that the proposed method
can achieve a very high availability for real-time premium traffic in future IP/MPLS networks.
