Sofian Hamad - Academia.edu (original) (raw)
Papers by Sofian Hamad
Reactive routing protocols in Mobile Adhoc Networks (MANETs) rely on the discovery process to est... more Reactive routing protocols in Mobile Adhoc Networks (MANETs) rely on the discovery process to establish routes between the communication peers. The discovery process employs data flooding to propagate the routing control messages in the network. This process is very costly in terms of packet collisions, network contention and routing overhead, which significantly impacts the network performance. In addition, MANET mobility support is one of the prevalent factors that cause of links and routes breakage. Besides, MANET nodes are battery driven devices that are featured by limited energy lifetime and hardware resources. In this paper, a new routing protocol called Link Stability and Energy Aware (LSEA) is proposed, which is a modified version of Ad-hoc On Demand Distance Vector (AODV) protocol. LSEA employs a novel route discovery process that takes into account the links stability and the nodes residual energy to perform data routing. The simulation results show that LSEA reduces the ...
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2011 Eighth International Conference on Fuzzy Systems and Knowledge Discovery (FSKD), 2011
Abstract Equipping routers in Wireless Mesh Networks with multiple radios tuned to multiple non-o... more Abstract Equipping routers in Wireless Mesh Networks with multiple radios tuned to multiple non-overlapping channels increases network connectivity and improves system throughput. On the other hand, selfish behavior of nodes during channel assignment can drastically ...
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2011 International Conference on Innovations in Information Technology, 2011
Flooding is widely used by the routing protocols as the operation to propagate update packets in ... more Flooding is widely used by the routing protocols as the operation to propagate update packets in the network. The basic flooding is shown to cause high retransmissions, packet collisions and media congestion that can significantly degrades the network performance. Knowing the geographical position of the mobile nodes can assist the protocol to reduce the number of retransmissions, enhancing therefore, the
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2011 Fifth International Conference on Next Generation Mobile Applications, Services and Technologies, 2011
Abstract In this paper, a number of spectrum sensing schemes implementation in ultra wideband and... more Abstract In this paper, a number of spectrum sensing schemes implementation in ultra wideband and Cognitive radio component (UWB-CR) under different fading settings condition are studied. The sensing performance of different detectors is compared in ...
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Proceedings of the 9th ACM international symposium on Mobility management and wireless access - MobiWac '11, 2011
Abstract In this paper, a new routing protocol called Link Stability and Energy Aware (LSEA) is p... more Abstract In this paper, a new routing protocol called Link Stability and Energy Aware (LSEA) is proposed, which is a modified version of Ad-hoc On Demand Distance Vector (AODV) protocol. LSEA employs a novel route discovery process that takes into account the links ...
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2011 International Conference on Innovations in Information Technology, 2011
The location awareness of the primary user is one of the essential features of cognitive radios. ... more The location awareness of the primary user is one of the essential features of cognitive radios. The Location information of the primary user in cognitive radio can be used to assist the communication among secondary users outside the transmission coverage area of primary users or to track the primary users. A cognitive radio network based localization scheme is considered in
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2011 Wireless Advanced, 2011
Abstract Most of the Routing protocol used flooding as the process to disseminate the update pack... more Abstract Most of the Routing protocol used flooding as the process to disseminate the update packets in the network. The basic flooding is cause high retransmissions which lead to packet collisions and media congestion that can significantly degrade the network ...
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Background: In most reactive routing protocols, the discovery process for any dictation starts b... more Background:
In most reactive routing protocols, the discovery process for any dictation starts by sending a RREQ (Route request) to neighboring nodes. Then, the intermediate nodes will rebroadcast the RREQ until the destination is found.
Objective:
In this study, new techniques have been suggested to reduce the broadcast of the RREQ packets in the network, when the reactive routing protocols are used. These techniques are Closest Candidate Neighbors for Rebroadcasting the RREQ (C-CNRR) and Furthest Candidate Neighbors for Rebroadcasting the RREQ (F-CNRR).
Methodology:
The key concept behind these two routing protocols is to divide the transmission
range for each node that needs to find a path to a specific destination to four equal zones. Then, if no route is found in its routing table,
one node per zone will be smartly selected to rebroadcast the received RREQ.
Results:
The simulation results show that in term of
overhead, the C-CNRR and F-CNRR have better performance than th
e traditional ad hoc on-demand distance vector (AODV) routing protocol.
Conclusion:
Furthermore, reducing the overhead by more than 15% with our proposed techniques is reflected in an increase in the network throughput and a diminishing of data dropping.
Bookmarks Related papers MentionsView impact
Reactive routing protocols in Mobile Adhoc Networks (MANETs) rely on the discovery process to est... more Reactive routing protocols in Mobile Adhoc Networks (MANETs) rely on the discovery process to establish routes between the communication peers. The discovery process employs data flooding to propagate the routing control messages in the network. This process is very costly in terms of packet collisions, network contention and routing overhead, which significantly impacts the network performance. In addition, MANET mobility support is one of the prevalent factors that cause of links and routes breakage. Besides, MANET nodes are battery driven devices that are featured by limited energy lifetime and hardware resources. In this paper, a new routing protocol called Link Stability and Energy Aware (LSEA) is proposed, which is a modified version of Ad-hoc On Demand Distance Vector (AODV) protocol. LSEA employs a novel route discovery process that takes into account the links stability and the nodes residual energy to perform data routing. The simulation results show that LSEA reduces the ...
Bookmarks Related papers MentionsView impact
2011 Eighth International Conference on Fuzzy Systems and Knowledge Discovery (FSKD), 2011
Abstract Equipping routers in Wireless Mesh Networks with multiple radios tuned to multiple non-o... more Abstract Equipping routers in Wireless Mesh Networks with multiple radios tuned to multiple non-overlapping channels increases network connectivity and improves system throughput. On the other hand, selfish behavior of nodes during channel assignment can drastically ...
Bookmarks Related papers MentionsView impact
2011 International Conference on Innovations in Information Technology, 2011
Flooding is widely used by the routing protocols as the operation to propagate update packets in ... more Flooding is widely used by the routing protocols as the operation to propagate update packets in the network. The basic flooding is shown to cause high retransmissions, packet collisions and media congestion that can significantly degrades the network performance. Knowing the geographical position of the mobile nodes can assist the protocol to reduce the number of retransmissions, enhancing therefore, the
Bookmarks Related papers MentionsView impact
2011 Fifth International Conference on Next Generation Mobile Applications, Services and Technologies, 2011
Abstract In this paper, a number of spectrum sensing schemes implementation in ultra wideband and... more Abstract In this paper, a number of spectrum sensing schemes implementation in ultra wideband and Cognitive radio component (UWB-CR) under different fading settings condition are studied. The sensing performance of different detectors is compared in ...
Bookmarks Related papers MentionsView impact
Proceedings of the 9th ACM international symposium on Mobility management and wireless access - MobiWac '11, 2011
Abstract In this paper, a new routing protocol called Link Stability and Energy Aware (LSEA) is p... more Abstract In this paper, a new routing protocol called Link Stability and Energy Aware (LSEA) is proposed, which is a modified version of Ad-hoc On Demand Distance Vector (AODV) protocol. LSEA employs a novel route discovery process that takes into account the links ...
Bookmarks Related papers MentionsView impact
2011 International Conference on Innovations in Information Technology, 2011
The location awareness of the primary user is one of the essential features of cognitive radios. ... more The location awareness of the primary user is one of the essential features of cognitive radios. The Location information of the primary user in cognitive radio can be used to assist the communication among secondary users outside the transmission coverage area of primary users or to track the primary users. A cognitive radio network based localization scheme is considered in
Bookmarks Related papers MentionsView impact
2011 Wireless Advanced, 2011
Abstract Most of the Routing protocol used flooding as the process to disseminate the update pack... more Abstract Most of the Routing protocol used flooding as the process to disseminate the update packets in the network. The basic flooding is cause high retransmissions which lead to packet collisions and media congestion that can significantly degrade the network ...
Bookmarks Related papers MentionsView impact
Background: In most reactive routing protocols, the discovery process for any dictation starts b... more Background:
In most reactive routing protocols, the discovery process for any dictation starts by sending a RREQ (Route request) to neighboring nodes. Then, the intermediate nodes will rebroadcast the RREQ until the destination is found.
Objective:
In this study, new techniques have been suggested to reduce the broadcast of the RREQ packets in the network, when the reactive routing protocols are used. These techniques are Closest Candidate Neighbors for Rebroadcasting the RREQ (C-CNRR) and Furthest Candidate Neighbors for Rebroadcasting the RREQ (F-CNRR).
Methodology:
The key concept behind these two routing protocols is to divide the transmission
range for each node that needs to find a path to a specific destination to four equal zones. Then, if no route is found in its routing table,
one node per zone will be smartly selected to rebroadcast the received RREQ.
Results:
The simulation results show that in term of
overhead, the C-CNRR and F-CNRR have better performance than th
e traditional ad hoc on-demand distance vector (AODV) routing protocol.
Conclusion:
Furthermore, reducing the overhead by more than 15% with our proposed techniques is reflected in an increase in the network throughput and a diminishing of data dropping.
Bookmarks Related papers MentionsView impact