The Experts below are selected from a list of 51783 Experts worldwide ranked by ideXlab platform
Sunil Vadgama - One of the best experts on this subject based on the ideXlab platform.
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Handover Mechanisms for Planned Cell Outage in Twin State Green Wireless Networks
2011 IEEE 73rd Vehicular Technology Conference (VTC Spring), 2011Co-Authors: Mythri Hunukumbure, Rajni Agarwal, Sunil VadgamaAbstract:This paper investigates possible Handover mechanisms for a twin state network aimed at energy saving. We propose the twin state network as a viable 'Green' option and illustrate the possible energy savings. The challenge of conducting multiple Handovers within the transit times of the twin state network, while maintaining the service quality is discussed. The possible Handover solutions through multi-carrier operation, FFR and incremental coverage extension are presented in the context of LTE standards.
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VTC Spring - Handover Mechanisms for Planned Cell Outage in Twin State Green Wireless Networks
2011 IEEE 73rd Vehicular Technology Conference (VTC Spring), 2011Co-Authors: Mythri Hunukumbure, Rajni Agarwal, Sunil VadgamaAbstract:This paper investigates possible Handover mechanisms for a twin state network aimed at energy saving. We propose the twin state network as a viable 'Green' option and illustrate the possible energy savings. The challenge of conducting multiple Handovers within the transit times of the twin state network, while maintaining the service quality is discussed. The possible Handover solutions through multi-carrier operation, FFR and incremental coverage extension are presented in the context of LTE standards.
Xiping Wu - One of the best experts on this subject based on the ideXlab platform.
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A Novel Handover Scheme for Hybrid LiFi and WiFi Networks
ICC 2020 - 2020 IEEE International Conference on Communications (ICC), 2020Co-Authors: Xiping Wu, Dominic O’brienAbstract:Combining the high transmission speed of light fidelity (LiFi) and the ubiquitous coverage of wireless fidelity (WiFi), hybrid LiFi and WiFi network (HLWNet) has attracted intensive research interest. While such a network can boost the system capacity, it faces a challenging issue in Handover since the coverage areas of LiFi and WiFi completely overlap each other. Also, LiFi has a relatively short coverage range from a single access point (AP). As a result, HLWNets are susceptible to frequent Handovers, in terms of both Handovers between LiFi and WiFi and Handovers between two LiFi APs. Therefore Handover skipping was introduced, which enables Handovers between two non-adjacent APs. Conventional Handover skipping schemes rely on knowledge about the user's trajectory, and are difficult to implement in practice. Alternatively, the rate of change in reference signal received power (RSRP) can be used to reflect the user's moving direction. Based on this, an adaptive Handover scheme is proposed in this paper, which varies the user's network preference according to the user's speed. Results show that in comparison with the standard and trajectory-based schemes, the proposed approach can improve user throughput by up to about 120% and 30%, respectively.
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Handover Skipping for LiFi
IEEE Access, 2019Co-Authors: Xiping Wu, Harald HaasAbstract:This paper studies Handover skipping, which enables Handovers between two non-adjacent access points (APs), in light fidelity (LiFi) networks. LiFi is an emerging wireless communication technology, which operates in a way similar to wireless fidelity (WiFi) but uses light waves as a medium. Compared with WiFi, LiFi has a relatively shorter range with a single AP. This could possibly cause more frequent Handovers, and thus, Handover skipping techniques are required. Conventional Handover skipping methods rely on information about the user's trajectory, which is not ready to use at the AP. In this paper, a novel Handover skipping scheme based on the reference signal received power (RSRP) is proposed. The new approach combines the value of RSRP and its rate of change to determine the Handover target. Since RSRP is already used in the current Handover schemes, the proposed method does not require additional feedback. The results show that compared with the standard Handover scheme and the conventional Handover skipping method, the proposed method can reduce Handover rate by up to 29% and 17% and improve throughput by up to 66% and 26%, respectively.
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RSS-Based Handover Skipping for Ultra-Dense Attocell Networks
2019 IEEE 89th Vehicular Technology Conference (VTC2019-Spring), 2019Co-Authors: Xiping Wu, Harald HaasAbstract:Light fidelity (LiFi) is a recently proposed wireless communication technology that employs the light wave as a medium to transmit data. With the coverage range of a few meters, LiFi access points (APs) comprise an ultra-dense attocell network. As a result, users may quickly traverse the coverage area of one LiFi AP, even with a moderate speed. This would cause frequent Handovers and a subsequent decrease in the user's throughput. Handover skipping (HS), which enables Handovers between two non-adjacent APs, is able to reduce the Handover rate. Conventional HS methods rely on the user's trajectory, which is difficult for APs to acquire in practice. In this paper, we propose a novel HS scheme on the basis of received signal strength (RSS). Specifically, the rate of change in RSS is exploited to indicate whether the user is moving towards a certain AP. Since RSS is already used in standard Handover schemes, the proposed method does not require extra feedback. Results show that compared to the signal strength strategy, the proposed HS approach can effectively reduce the Handover rate, especially for fast- moving users. With respect to the user's throughput, the new method can achieve an increase of up to 67% against the signal strength strategy.
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Smart Handover for Hybrid LiFi and WiFi Networks
IEEE Transactions on Wireless Communications, 1Co-Authors: Xiping Wu, Dominic C. O’brien, Xiong Deng, Jean-paul M. G. LinnartzAbstract:This work investigates Handover in hybrid light fidelity (LiFi) and wireless fidelity (WiFi) networks (HLWNets). In such a network, the Handover process becomes challenging due to two main factors: i) the relatively short coverage range of a single access point (AP), and ii) the largely overlapping coverage areas of different networks. As a result, HLWNets are susceptible to frequent Handovers. To reduce the Handover rate, the concept of Handover skipping (HS) was introduced, which enables Handovers between non-adjacent APs. However, conventional HS methods rely on knowledge about the user’s trajectory, which is not readily available at the AP. In this paper, a novel HS scheme is proposed on the basis of reference signal received power (RSRP) and its rate of change, with an adaptive network preference adopted. Since RSRP is commonly used in the existing Handover schemes, the proposed method requires no additional signalling between the user and the AP. Simulation results show that the new method can effectively reduce unnecessary Handovers, especially those between LiFi and WiFi. Compared to the standard and trajectory-based Handover schemes, the proposed method improves network throughput by up to about 120% and 30%, respectively.
Mythri Hunukumbure - One of the best experts on this subject based on the ideXlab platform.
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Handover Mechanisms for Planned Cell Outage in Twin State Green Wireless Networks
2011 IEEE 73rd Vehicular Technology Conference (VTC Spring), 2011Co-Authors: Mythri Hunukumbure, Rajni Agarwal, Sunil VadgamaAbstract:This paper investigates possible Handover mechanisms for a twin state network aimed at energy saving. We propose the twin state network as a viable 'Green' option and illustrate the possible energy savings. The challenge of conducting multiple Handovers within the transit times of the twin state network, while maintaining the service quality is discussed. The possible Handover solutions through multi-carrier operation, FFR and incremental coverage extension are presented in the context of LTE standards.
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VTC Spring - Handover Mechanisms for Planned Cell Outage in Twin State Green Wireless Networks
2011 IEEE 73rd Vehicular Technology Conference (VTC Spring), 2011Co-Authors: Mythri Hunukumbure, Rajni Agarwal, Sunil VadgamaAbstract:This paper investigates possible Handover mechanisms for a twin state network aimed at energy saving. We propose the twin state network as a viable 'Green' option and illustrate the possible energy savings. The challenge of conducting multiple Handovers within the transit times of the twin state network, while maintaining the service quality is discussed. The possible Handover solutions through multi-carrier operation, FFR and incremental coverage extension are presented in the context of LTE standards.
Harald Haas - One of the best experts on this subject based on the ideXlab platform.
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Handover Skipping for LiFi
IEEE Access, 2019Co-Authors: Xiping Wu, Harald HaasAbstract:This paper studies Handover skipping, which enables Handovers between two non-adjacent access points (APs), in light fidelity (LiFi) networks. LiFi is an emerging wireless communication technology, which operates in a way similar to wireless fidelity (WiFi) but uses light waves as a medium. Compared with WiFi, LiFi has a relatively shorter range with a single AP. This could possibly cause more frequent Handovers, and thus, Handover skipping techniques are required. Conventional Handover skipping methods rely on information about the user's trajectory, which is not ready to use at the AP. In this paper, a novel Handover skipping scheme based on the reference signal received power (RSRP) is proposed. The new approach combines the value of RSRP and its rate of change to determine the Handover target. Since RSRP is already used in the current Handover schemes, the proposed method does not require additional feedback. The results show that compared with the standard Handover scheme and the conventional Handover skipping method, the proposed method can reduce Handover rate by up to 29% and 17% and improve throughput by up to 66% and 26%, respectively.
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RSS-Based Handover Skipping for Ultra-Dense Attocell Networks
2019 IEEE 89th Vehicular Technology Conference (VTC2019-Spring), 2019Co-Authors: Xiping Wu, Harald HaasAbstract:Light fidelity (LiFi) is a recently proposed wireless communication technology that employs the light wave as a medium to transmit data. With the coverage range of a few meters, LiFi access points (APs) comprise an ultra-dense attocell network. As a result, users may quickly traverse the coverage area of one LiFi AP, even with a moderate speed. This would cause frequent Handovers and a subsequent decrease in the user's throughput. Handover skipping (HS), which enables Handovers between two non-adjacent APs, is able to reduce the Handover rate. Conventional HS methods rely on the user's trajectory, which is difficult for APs to acquire in practice. In this paper, we propose a novel HS scheme on the basis of received signal strength (RSS). Specifically, the rate of change in RSS is exploited to indicate whether the user is moving towards a certain AP. Since RSS is already used in standard Handover schemes, the proposed method does not require extra feedback. Results show that compared to the signal strength strategy, the proposed HS approach can effectively reduce the Handover rate, especially for fast- moving users. With respect to the user's throughput, the new method can achieve an increase of up to 67% against the signal strength strategy.
Rajni Agarwal - One of the best experts on this subject based on the ideXlab platform.
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Handover Mechanisms for Planned Cell Outage in Twin State Green Wireless Networks
2011 IEEE 73rd Vehicular Technology Conference (VTC Spring), 2011Co-Authors: Mythri Hunukumbure, Rajni Agarwal, Sunil VadgamaAbstract:This paper investigates possible Handover mechanisms for a twin state network aimed at energy saving. We propose the twin state network as a viable 'Green' option and illustrate the possible energy savings. The challenge of conducting multiple Handovers within the transit times of the twin state network, while maintaining the service quality is discussed. The possible Handover solutions through multi-carrier operation, FFR and incremental coverage extension are presented in the context of LTE standards.
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VTC Spring - Handover Mechanisms for Planned Cell Outage in Twin State Green Wireless Networks
2011 IEEE 73rd Vehicular Technology Conference (VTC Spring), 2011Co-Authors: Mythri Hunukumbure, Rajni Agarwal, Sunil VadgamaAbstract:This paper investigates possible Handover mechanisms for a twin state network aimed at energy saving. We propose the twin state network as a viable 'Green' option and illustrate the possible energy savings. The challenge of conducting multiple Handovers within the transit times of the twin state network, while maintaining the service quality is discussed. The possible Handover solutions through multi-carrier operation, FFR and incremental coverage extension are presented in the context of LTE standards.
