Multi-Path Admission Control for Mobile Ad hoc Networks

As wireless networks become more prevalent, users will demand the same applications that are currently available in wired networks. Further, they will expect to receive a quality of service similar to that obtained in a wired network. Included in these applications are real-time applications such as voice over IP and multimedia streams. To enable the support of applications that require real-time communication in ad hoc networks, congestion must be prevented so that the needed quality of service can be provided. An admission control mechanism is an essential component of the quality of service solution. Unfortunately, current admission control solutions encounter problems during mobility, often resulting in unacceptable disruptions in communication. To solve this problem, we apply multi-path routing mechanisms that maintain alternate paths to the destination and propose a new admission control protocol. We show through simulation that our solution is able to prevent communication disruptions and meet the QoS needs of applications better than previous solutions. 1

Leveraging Mobility to Improve Quality of Service in Mobile Networks

Existing solutions for QoS-aware routing in mobile multi-hop networks attempt to discover a QoSsatisfactory route for the user at the user's current location. If a suitable route is not available at the current location, the user is denied access. This approach does not take advantage of the special characteristics of mobile multi-hop networks. That is, users in these networks are mobile and their connectivity is dependent on their location and the locations of other users. By changing their location, users can alter their connectivity characteristics and potentially obtain better service from the network. In this paper, we propose enhancing QoS-aware routing protocols to take advantage of this characteristic. With our solution, if a satisfactory route is not available at the user's current location, the protocol discovers a nearby location where a better route is available. The user can then choose to move to the suggested location to improve the received quality of service. We demonstrate our idea by appropriately extending a QoS-sensitive version of the AODV routing protocol, and presenting a simulation-based evaluation. Simulation results show the effectiveness and efficiency of our idea. 1

MobiHoc Poster Paper: Multi-path Admission Control for Mobile Ad hoc Networks

To enable the use of applications that require real-time communication in ad hoc networks, an admission control mechanism must be in place to prevent the network from becoming congested, since congestion results in reduced quality of service for applications. Current admission control solutions encounter problems in the face of mobility, resulting in unacceptable disruptions in communication. To solve this problem, we apply multi-path routing mechanisms and propose a new admission control protocol. We show through simulation that our solution is able to prevent communication disruptions and meet the QoS needs of the application. I

AODV routing protocol implementation design

To date, the majority of ad hoc routing protocol research has been done using simulation only. One of the most motivating reasons to use simulation is the difficulty of creating a real implementation. In a simulator, the code is contained within a single logical component, which is clearly defined and accessible. On the other hand, creating an implementation requires use of a system with many components, including many that have little or no documentation. The implementation developer must understand not only the routing protocol, but all the system components and their complex interactions. Further, since ad hoc routing protocols are significantly different from traditional routing protocols, a new set of features must be introduced to support the routing protocol. In this paper we describe the event triggers required for AODV operation, the design possibilities and the decisions for our Ad hoc On-demand Distance Vector (AODV) routing protocol implementation, AODV-UCSB. This paper is meant to aid researchers in developing their own on-demand ad hoc routing protocols and assist users in determining the implementation design that best fits their needs. 1