Network selection and speetrum handoff based on adaptive weights in cognitive wireless networks

Abstract

ABSTRACT newlineWhile the technology advances day by day, much of the attention of science and industry is on applications such as smart cities, transportation, and health care. In this form of application the machine-to-machine communication (M-2-M) is an acceptable technology. This technology allows all-pervasive communication with complete automation in densely deployed network where-in access points (APs) of WLANs are located too densely thereby facilitating highly redundant sensor data transmission through a large number of sensor nodes sense data and transmit it to a particular sink through multi-hop communications connected through wired / wireless connections requiring no direct human interaction with the devices. In a densely deployed sensor node network. The entire network stack should be configured in compliance with the particular specifications of the M-2-M communication to efficiently use this technology. newlineThis thesis envisions a new hybrid MAC framework that is an instantiation related to medium access systems based both on contention and on reservations. We suppose that this instantiation is a framework consisting primarily of two parts. These are containment interval CI and information interval DTI . The length of CI follows the p-persistent CMA system. This facilitates channel access by M-2-M appliances. The effective systems gain slots of time and transmit the data packets after during DTI. The length of CI is p-persistent CMA. It makes channel control simpler for M-2-M devices. The successful systems gain time and relay information packets, during DTI, after conflict resolution. This proposed MAC-Hybrid protocol; a time-division-multiple access mechanism (TDMA) is followed by the DTI loop which allows the use of IEEE802.11 DCF for any M-2-M instrument. To mitigate the various drawbacks of TDMA, a transmission network for every TDMA Time-Slot communicates with their respective remote systems using the IEEE-802.11(DCF) protocol. Intended hybrid-MAC-protocol appreciably improves efficiency compared to slo