Lawal Bello | University of Greenwich (original) (raw)
Papers by Lawal Bello
2011 UkSim 13th International Conference on Computer Modelling and Simulation, 2011
AbstractA technique is proposed to evaluate the effect of ambient noise and path loss have on re... more AbstractA technique is proposed to evaluate the effect of ambient noise and path loss have on received signal strength of mobile node in a mobile ad hoc network environment using optimized network (OPNET) simulator while comparing the performance of Ad-Hoc on demand ...
2011 IEEE 73rd Vehicular Technology Conference (VTC Spring), 2011
An information capacity-cost analysis is used to find a minimum cell size for information capacit... more An information capacity-cost analysis is used to find a minimum cell size for information capacity increase in cellular wireless network, thus a theoretical limit to cell size reduction. The results show that as the cell size radius R reduces to 300 m and less, the proposed interference model show a 5.76-18.89 % decrease in the information capacity per unit cost (£, $, etc) at microwave carrier frequencies f c > 3.35 GHz. This result illustrates that there is a theoretical limit to cell size reduction in relation to information capacity performance and cost. An inductive approach is used to generate a formula for calculating the number of co-channel interfering cells N n in a cellular wireless site layout. Such a formula allows one to calculate the number of co-channel interfering cells in subsequent tiers of a cellular wireless site layout. The geometric derivation shows that the number of co-channel interfering cell N n in a subsequent tier is the product of the number of co-channel interfering cells in the first tier N I and the tier number n. Thus, the number of co-channel interfering cell in a subsequent tier N n = N I × n. This formula enables subsequent tier co-channel interference to be included in the information capacity analysis of future and emerging, and finding the minimum cell size for information capacity increase in a cellular wireless communication system.
2017 Progress In Electromagnetics Research Symposium - Spring (PIERS), May 1, 2017
In this paper, a new technique is proposed for conserving power in mobile ad hoc wireless network... more In this paper, a new technique is proposed for conserving power in mobile ad hoc wireless network. The technique is based on the existing on-demand ad hoc routing protocols with the addition of power model. The unique feature of the technique is that mobile nodes will be able to evaluate their power status to decide if they are fit for packet forwarding and reception. This is illustrated using computational approach supported by computer simulations over mobile ad hoc wireless network containing 18 mobile nodes. The proposed technique is incorporated into the Ad Hoc On demand Distance Vector (AODV) and Dynamic Source Routing (DSR) protocols. The results showed that using power saving technique reduces power consumption to more than 15% rate at which mobile nodes achieved with no much delay in the network as compared to the conventional network configured with AODV and DSR routing protocols.
The conventional approach implements an equalizer to remove ISI or use MAP or maximum likelihood ... more The conventional approach implements an equalizer to remove ISI or use MAP or maximum likelihood (ML) detection. Data reliability can be enhanced using coding, where the data is encoded in the transmitter prior to transmission. For reasons of complexity, the receiver then ...
Design and Development, 2013
2010 International Conference on Communications and Mobile Computing, 2010
... Bello Lawal School of Engineering, Computer and Communication Department University of Greenw... more ... Bello Lawal School of Engineering, Computer and Communication Department University of Greenwich Central Avenue, Chatham, Kent ME4 4TB UK. ... Thanks are due to Umaru Musa Yar'adua State University Katsina Nigeria for their support as well as anonymous reviewers for ...
Progress In Electromagnetics Research B, 2012
In this paper, mathematical analysis supported by computer simulation is used to study cellular s... more In this paper, mathematical analysis supported by computer simulation is used to study cellular system information capacity change due to propagation loss and system parameters (such as path loss exponent, shadowing and antenna height) at microwave carrier frequencies greater than 2 GHz and smaller cell size radius. An improved co-channel interference model, which includes the second tier co-channel interfering cells is used for the analysis. The system performance is measured in terms of the uplink information capacity of a time-division multiple access (TDMA) based cellular wireless system. The analysis and simulation results show that the second tier cochannel interfering cells become active at higher microwave carrier frequencies and smaller cell size radius. The results show that for both distance-dependent: path loss, shadowing and effective road height the uplink information capacity of the cellular wireless system decreases as carrier frequency f c increases and cell size radius R decreases. For example at a carrier frequency f c = 15.75 GHz, basic path loss exponent α = 2 and cell size radius R = 100, 500 and 1000 m the decrease in information capacity was 20, 5.29 and 2.68%.
3rd IEEE International Conference on Adaptive Science and Technology (ICAST 2011), 2011
Abstract In this paper, we describe a simulation performance of Vehicular Ad hoc network on diffe... more Abstract In this paper, we describe a simulation performance of Vehicular Ad hoc network on different traffic models in a dynamic changing environment. The simulation results showed that as delay and jitter increases, the throughput of receiving bits decreases, the nodes ...
2011 UKSim 5th European Symposium on Computer Modeling and Simulation, 2011
Page 1. Impact of Vehicular Traffic on Information Capacity of Cellular Wireless Network At Carri... more Page 1. Impact of Vehicular Traffic on Information Capacity of Cellular Wireless Network At Carrier Frequencies Greater Than 3 GHz Kwashie A. Anang, Predrag B. Rpajic, Titus. I. Eneh, Lawal Bello and Grace Oletu Department ...
2012 IEEE 14th International Conference on Communication Technology, 2012
ABSTRACT This paper, uses computer simulation to study the impact of wireless channel on the perf... more ABSTRACT This paper, uses computer simulation to study the impact of wireless channel on the performance of Dynamic Source Routing (DSR) protocol for multi-hop wireless ad hoc networks of mobile nodes at higher microwave carrier frequencies greater than 2 GHz. Simulation results shows that as the path loss exponent of the propagation model increases the received signal power at individual mobile nodes also increases. The path loss exponent had no effect on the end-to-end throughput of the DSR protocol for multi-hop wireless ad hoc networks.
2011 3rd International Conference on Computer Research and Development, 2011
Page 1. Sensitivity of Information Capacity of Land Mobile Cellular System to the Base Station An... more Page 1. Sensitivity of Information Capacity of Land Mobile Cellular System to the Base Station Antenna Height at Higher Microwave Frequencies Kwashie A. Anang, Predrag B. Rapajic, Titus. I. Eneh and G. Oletu Department ...
2011 Future of Instrumentation International Workshop (FIIW) Proceedings, 2011
ABSTRACT In this paper, we describe a simulation study of the impact of topology control and traf... more ABSTRACT In this paper, we describe a simulation study of the impact of topology control and traffic models on the performance of Mobile Ad Hoc Wireless Network routing protocol in a dynamic changing environment. Simulation results shows that Constant Bit Rate (CBR) outperformed Transmission Control Protocol (TCP) in all metrics chosen, except for TCP which was able to handle packet delivery in large topologies than CBR, but at the cost of increase in overall delay in the network. From the simulation results it is concluded that, the increase in spurious packet drops in TCP is due to its slow start which invoke its congestion control algorithm.
2012 UKSim 14th International Conference on Computer Modelling and Simulation, 2012
In this paper, we describe a computer simulation study of the sensitivity of Dynamic Source Routi... more In this paper, we describe a computer simulation study of the sensitivity of Dynamic Source Routing (DSR) protocol performance to wireless channel at microwave carrier frequencies greater than 2 GHz. Performance simulation results show that at microwave carrier frequencies greater than 2 GHz, the break point distance effect the performance of the Dynamic Source Routing Protocol in Mobile Wireless Ad
2011 IEEE 13th International Conference on Communication Technology, 2011
In this paper, we describe a simulation study of the impact of wireless channel on Dynamic Source... more In this paper, we describe a simulation study of the impact of wireless channel on Dynamic Source Routing (DSR) protocol performance at microwave carrier frequencies above 2 GHz. Simulation results show that at microwave carrier frequencies above 2 GHz, when the two-slope path loss model is used for channel modelling, the breakpoint distance affect the end-to-end throughput of the DSR protocol in Mobile Wireless Ad Hoc Network (MANET), whilst at frequencies below 2 GHz the end-to-end throughput for the free space and the two-slope path loss model was the same.
2012 IEEE 4th International Conference on Adaptive Science & Technology (ICAST), 2012
ABSTRACT In this paper, mathematical analysis supported by computer simulation are used to study ... more ABSTRACT In this paper, mathematical analysis supported by computer simulation are used to study the impact of vehicular traffic on the performance of cellular wireless network operating at carrier frequencies greater than 2 GHz. The performance analysis is founded on the uplink information capacity of a cellular wireless system where co-channel interference are from multiple tiers. Results show that for both light and heavy vehicular traffic environment, at higher carrier frequencies and smaller cell size, other tiers of co-channel interfering cells become active. The results also that for heavy vehicular traffic the decrease in information capacity was lesser as compare to light vehicular traffic.
2011 UkSim 13th International Conference on Computer Modelling and Simulation, 2011
AbstractA technique is proposed to evaluate the effect of ambient noise and path loss have on re... more AbstractA technique is proposed to evaluate the effect of ambient noise and path loss have on received signal strength of mobile node in a mobile ad hoc network environment using optimized network (OPNET) simulator while comparing the performance of Ad-Hoc on demand ...
2011 IEEE 73rd Vehicular Technology Conference (VTC Spring), 2011
An information capacity-cost analysis is used to find a minimum cell size for information capacit... more An information capacity-cost analysis is used to find a minimum cell size for information capacity increase in cellular wireless network, thus a theoretical limit to cell size reduction. The results show that as the cell size radius R reduces to 300 m and less, the proposed interference model show a 5.76-18.89 % decrease in the information capacity per unit cost (£, $, etc) at microwave carrier frequencies f c > 3.35 GHz. This result illustrates that there is a theoretical limit to cell size reduction in relation to information capacity performance and cost. An inductive approach is used to generate a formula for calculating the number of co-channel interfering cells N n in a cellular wireless site layout. Such a formula allows one to calculate the number of co-channel interfering cells in subsequent tiers of a cellular wireless site layout. The geometric derivation shows that the number of co-channel interfering cell N n in a subsequent tier is the product of the number of co-channel interfering cells in the first tier N I and the tier number n. Thus, the number of co-channel interfering cell in a subsequent tier N n = N I × n. This formula enables subsequent tier co-channel interference to be included in the information capacity analysis of future and emerging, and finding the minimum cell size for information capacity increase in a cellular wireless communication system.
2017 Progress In Electromagnetics Research Symposium - Spring (PIERS), May 1, 2017
In this paper, a new technique is proposed for conserving power in mobile ad hoc wireless network... more In this paper, a new technique is proposed for conserving power in mobile ad hoc wireless network. The technique is based on the existing on-demand ad hoc routing protocols with the addition of power model. The unique feature of the technique is that mobile nodes will be able to evaluate their power status to decide if they are fit for packet forwarding and reception. This is illustrated using computational approach supported by computer simulations over mobile ad hoc wireless network containing 18 mobile nodes. The proposed technique is incorporated into the Ad Hoc On demand Distance Vector (AODV) and Dynamic Source Routing (DSR) protocols. The results showed that using power saving technique reduces power consumption to more than 15% rate at which mobile nodes achieved with no much delay in the network as compared to the conventional network configured with AODV and DSR routing protocols.
The conventional approach implements an equalizer to remove ISI or use MAP or maximum likelihood ... more The conventional approach implements an equalizer to remove ISI or use MAP or maximum likelihood (ML) detection. Data reliability can be enhanced using coding, where the data is encoded in the transmitter prior to transmission. For reasons of complexity, the receiver then ...
Design and Development, 2013
2010 International Conference on Communications and Mobile Computing, 2010
... Bello Lawal School of Engineering, Computer and Communication Department University of Greenw... more ... Bello Lawal School of Engineering, Computer and Communication Department University of Greenwich Central Avenue, Chatham, Kent ME4 4TB UK. ... Thanks are due to Umaru Musa Yar'adua State University Katsina Nigeria for their support as well as anonymous reviewers for ...
Progress In Electromagnetics Research B, 2012
In this paper, mathematical analysis supported by computer simulation is used to study cellular s... more In this paper, mathematical analysis supported by computer simulation is used to study cellular system information capacity change due to propagation loss and system parameters (such as path loss exponent, shadowing and antenna height) at microwave carrier frequencies greater than 2 GHz and smaller cell size radius. An improved co-channel interference model, which includes the second tier co-channel interfering cells is used for the analysis. The system performance is measured in terms of the uplink information capacity of a time-division multiple access (TDMA) based cellular wireless system. The analysis and simulation results show that the second tier cochannel interfering cells become active at higher microwave carrier frequencies and smaller cell size radius. The results show that for both distance-dependent: path loss, shadowing and effective road height the uplink information capacity of the cellular wireless system decreases as carrier frequency f c increases and cell size radius R decreases. For example at a carrier frequency f c = 15.75 GHz, basic path loss exponent α = 2 and cell size radius R = 100, 500 and 1000 m the decrease in information capacity was 20, 5.29 and 2.68%.
3rd IEEE International Conference on Adaptive Science and Technology (ICAST 2011), 2011
Abstract In this paper, we describe a simulation performance of Vehicular Ad hoc network on diffe... more Abstract In this paper, we describe a simulation performance of Vehicular Ad hoc network on different traffic models in a dynamic changing environment. The simulation results showed that as delay and jitter increases, the throughput of receiving bits decreases, the nodes ...
2011 UKSim 5th European Symposium on Computer Modeling and Simulation, 2011
Page 1. Impact of Vehicular Traffic on Information Capacity of Cellular Wireless Network At Carri... more Page 1. Impact of Vehicular Traffic on Information Capacity of Cellular Wireless Network At Carrier Frequencies Greater Than 3 GHz Kwashie A. Anang, Predrag B. Rpajic, Titus. I. Eneh, Lawal Bello and Grace Oletu Department ...
2012 IEEE 14th International Conference on Communication Technology, 2012
ABSTRACT This paper, uses computer simulation to study the impact of wireless channel on the perf... more ABSTRACT This paper, uses computer simulation to study the impact of wireless channel on the performance of Dynamic Source Routing (DSR) protocol for multi-hop wireless ad hoc networks of mobile nodes at higher microwave carrier frequencies greater than 2 GHz. Simulation results shows that as the path loss exponent of the propagation model increases the received signal power at individual mobile nodes also increases. The path loss exponent had no effect on the end-to-end throughput of the DSR protocol for multi-hop wireless ad hoc networks.
2011 3rd International Conference on Computer Research and Development, 2011
Page 1. Sensitivity of Information Capacity of Land Mobile Cellular System to the Base Station An... more Page 1. Sensitivity of Information Capacity of Land Mobile Cellular System to the Base Station Antenna Height at Higher Microwave Frequencies Kwashie A. Anang, Predrag B. Rapajic, Titus. I. Eneh and G. Oletu Department ...
2011 Future of Instrumentation International Workshop (FIIW) Proceedings, 2011
ABSTRACT In this paper, we describe a simulation study of the impact of topology control and traf... more ABSTRACT In this paper, we describe a simulation study of the impact of topology control and traffic models on the performance of Mobile Ad Hoc Wireless Network routing protocol in a dynamic changing environment. Simulation results shows that Constant Bit Rate (CBR) outperformed Transmission Control Protocol (TCP) in all metrics chosen, except for TCP which was able to handle packet delivery in large topologies than CBR, but at the cost of increase in overall delay in the network. From the simulation results it is concluded that, the increase in spurious packet drops in TCP is due to its slow start which invoke its congestion control algorithm.
2012 UKSim 14th International Conference on Computer Modelling and Simulation, 2012
In this paper, we describe a computer simulation study of the sensitivity of Dynamic Source Routi... more In this paper, we describe a computer simulation study of the sensitivity of Dynamic Source Routing (DSR) protocol performance to wireless channel at microwave carrier frequencies greater than 2 GHz. Performance simulation results show that at microwave carrier frequencies greater than 2 GHz, the break point distance effect the performance of the Dynamic Source Routing Protocol in Mobile Wireless Ad
2011 IEEE 13th International Conference on Communication Technology, 2011
In this paper, we describe a simulation study of the impact of wireless channel on Dynamic Source... more In this paper, we describe a simulation study of the impact of wireless channel on Dynamic Source Routing (DSR) protocol performance at microwave carrier frequencies above 2 GHz. Simulation results show that at microwave carrier frequencies above 2 GHz, when the two-slope path loss model is used for channel modelling, the breakpoint distance affect the end-to-end throughput of the DSR protocol in Mobile Wireless Ad Hoc Network (MANET), whilst at frequencies below 2 GHz the end-to-end throughput for the free space and the two-slope path loss model was the same.
2012 IEEE 4th International Conference on Adaptive Science & Technology (ICAST), 2012
ABSTRACT In this paper, mathematical analysis supported by computer simulation are used to study ... more ABSTRACT In this paper, mathematical analysis supported by computer simulation are used to study the impact of vehicular traffic on the performance of cellular wireless network operating at carrier frequencies greater than 2 GHz. The performance analysis is founded on the uplink information capacity of a cellular wireless system where co-channel interference are from multiple tiers. Results show that for both light and heavy vehicular traffic environment, at higher carrier frequencies and smaller cell size, other tiers of co-channel interfering cells become active. The results also that for heavy vehicular traffic the decrease in information capacity was lesser as compare to light vehicular traffic.