Multihop packet forwarding is a vital process in an ad hoc network. All ad hoc networking protocols, but particularly routing and medium access control protocols, must work together in order for the network to be successful. However, current MAC protocols such as IEEE 802.11 do not consider this multihop nature at all. This work develops a modification to 802.11 that focuses on forwarding packe...

A protocol to perform service discovery in adhoc networks is introduced in this paper. Attenuated Bloom filters are used to distribute services to nodes in the neighborhood and thus enable local service discovery. The protocol has been implemented in a discrete event simulator to investigate the behavior in case of a multihop mobile ad-hoc network with nodes that all have services to offer. Met...

This paper analyzes voice transmission capacity on IEEE 802.11 ad hoc networks by performing simulations related to delay, jitter, loss rate, and consecutive losses. We evaluate the influence of mobility on the number of sources transmitting voice. Another issue addressed in this paper is the effect of node density on voice transmission. Our simulation model has allowed us to identify the main ...

Optimal multihop routing in ad hoc networks requires the exchange of control messages at the MAC and network layer in order to set up the (centralized) optimization problem. Distributed opportunistic space-time collaboration (OST) is a valid alternative that avoids this drawback by enabling opportunistic cooperation with the source at the physical layer. In this paper, the performance of OST is...

Cellular networks and wireless local area networks (WLAN) are being widely deployed for mobile radio communications. Taking into account the advantageous and drawbacks of both network architectures, it becomes obvious that a combination of them is the logical consequence for future mobile radio networks. The scope of this paper is to introduce a future radio network architecture called hierarch...

In this paper, we conduct a systematic experimental study to identify the challenges for multirate adaptation in the context of multihop ad hoc networks. We first investigate the existing multirate adaptation algorithms to study how they operate in multihop ad hoc networks and obtain insights on the sources of their behavior. Second, we design and implement a novel multirate adaptation scheme, ...

In inter-working multi-hop wireless networks, establishing resilient connectivity between source-destination node pairs is a major issue. The issues of connectivity in multihop wireless networks have been studied. However these analyses focused on network connectivity in ad-hoc networks. Since the next generation of wireless networks will be inter-working, an understanding of connectivity as it...

We study the energy-efficient configuration of multihop paths with automatic repeat request (ARQ) mechanism in wireless ad hoc networks. We adopt a cross-layer design approach and take both the quality of each radio hop and the battery capacity of each transmitting node into consideration. Under certain constraints on the maximum tolerable transmission delay and the required packet delivery rat...

Abstract: Most of the investigations on ad hoc protocols do not consider the fact that future wireless networks are capable to adapt their behaviour to the channel situation. These adapting functionalities haven’t been developed to be used in multihop ad hoc networks. Therefore the performance of ad hoc routing using IEEE 802.11a turned out to be unexpected inefficient. This paper presents a ne...

A multihop Dynamic Channel Assignment Scheme is proposed here for Multihop Cellular network. The proposed scheme splits the cell into microcell and macrocell to accept and complete the call as single hop, two hops, or three hops call. The radio resources are assigned to each call based on the interference information in the surrounding cells, stored in Interference Information Table at MSC. Two...