| The work of this thesis is presented in two separate parts. The first part focuses on MANETs and the second part focuses on one of its subsets Vehicular Ad-Hoc Networks (VANETs). In the first part, we address the important problem of supporting real-time multimedia streaming applications along with their diverse QoS requirements in MANETs. Specifically, this work proposes and devises an integrated framework for QoS support in MANETs. that is specifically tailored to target specific requirements of multimedia streaming applications in order to meet their stringent QoS requirements.;The ultimate objective of the proposed QoS framework is to meet the end-to-end QoS requirements with the least possible resources while minimizing the average end-to-end delay as well as increasing the network throughput. The proposed framework for QoS support in MANETs encompasses three major functionally interdependent modules including QoS module, QoS Routing module, and QoS cross-layer module that meets the QoS requirements at multiple layers in the protocol stack including the physical (PHY), Medium Access Control (MAC), and the network layers.;The QoS module defines the service architecture of the overall QoS framework. The QoS cross-layer module proposed here ensures that the three layers must work and coordinate together in a collaborative and complementary fashion in order to satisfy the QoS requirements of the underlying applications. The PHY layer provides the channel-state information, e. g., SNR, while the MAC layer provides mechanisms for resolving medium contention, which ensures reservation at the link level only. The network layer ensures end-to-end resource negotiations, reservation, and reconfiguration. To implement the key module of the proposed QoS framework, a novel QoS-aware multipath routing protocol (QMRP) is developed.;The second part of this thesis addresses one of the main outstanding problems facing VANETs, namely, the broadcast storm problem, as communication in VANET depends heavily on broadcasting a message to all other vehicles in a certain geographical region. Specifically, we propose a dynamic suppression broadcast scheme (DSBS) for VANETs to alleviate the broadcast storm problem by dynamically suppressing the broadcast of a message based on the estimated distance reflected in the SNR value of the received message and the value of the broadcast counter. |
