摘要 :
IEEE 802.16 (popularly known as WiMax) devices and networks are due to enter the market in a few years time from now. With IEEE 802.11 (popularly known as Wi-Fi) already widely prevalent, it is highly unlikely that 802.16 will tot...
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IEEE 802.16 (popularly known as WiMax) devices and networks are due to enter the market in a few years time from now. With IEEE 802.11 (popularly known as Wi-Fi) already widely prevalent, it is highly unlikely that 802.16 will totally replace it. It is most likely that both these technologies will coexist complementing each other. Thus we need a standard that enables mobile devices that are compatible to both these networks to seamlessly handover from one to another. This paper discusses various parameters that such a mobile device needs to consider, methods to obtain them and an algorithm to determine the best network to handover in an environment that contains many 802.16 and 802.11 networks.
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摘要 :
IEEE 802.16 (popularly known as WiMax) devices and networks are due to enter the market in a few years time from now. With IEEE 802.11 (popularly known as Wi-Fi) already widely prevalent, it is highly unlikely that 802.16 will tot...
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IEEE 802.16 (popularly known as WiMax) devices and networks are due to enter the market in a few years time from now. With IEEE 802.11 (popularly known as Wi-Fi) already widely prevalent, it is highly unlikely that 802.16 will totally replace it. It is most likely that both these technologies will coexist complementing each other. Thus we need a standard that enables mobile devices that are compatible to both these networks to seamlessly handover from one to another. This paper discusses various parameters that such a mobile device needs to consider, methods to obtain them and an algorithm to determine the best network to handover in an environment that contains many 802.16 and 802.11 networks.
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IEEE 802.11 and IEEE 802.15.3 are wireless standards originally designed for Wireless Local Area Network (WLAN) and Wireless Personal Area Network (WPAN). This paper studies MAC throughput analysis of both standards. We present a ...
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IEEE 802.11 and IEEE 802.15.3 are wireless standards originally designed for Wireless Local Area Network (WLAN) and Wireless Personal Area Network (WPAN). This paper studies MAC throughput analysis of both standards. We present a comparative analysis of both standards in terms of MAC throughput and bandwidth efficiency. Numerical results show that the performance of IEEE 802.15.3 transcends IEEE 802.11 in all cases.
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摘要 :
IEEE 802.11 and IEEE 802.15.3 are wireless standards originally designed for Wireless Local Area Network (WLAN) and Wireless Personal Area Network (WPAN). This paper studies MAC throughput analysis of both standards. We present a ...
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IEEE 802.11 and IEEE 802.15.3 are wireless standards originally designed for Wireless Local Area Network (WLAN) and Wireless Personal Area Network (WPAN). This paper studies MAC throughput analysis of both standards. We present a comparative analysis of both standards in terms of MAC throughput and bandwidth efficiency. Numerical results show that the performance of IEEE 802.15.3 transcends IEEE 802.11 in all cases.
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Due to the high scarcity and high costs of radio spectrum, more and more radio services are occupying unlicensed bands for their operation. Due to this, there is a high risk of destructive interference which degrades the performan...
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Due to the high scarcity and high costs of radio spectrum, more and more radio services are occupying unlicensed bands for their operation. Due to this, there is a high risk of destructive interference which degrades the performance and fails to support Quality of Service (QoS) for systems operating in these bands. IEEE 802.11 based wireless networks are already operating in unlicensed band. A new competitor for unlicensed bands is the IEEE 802.16 based wireless metropolitan area network. Therefore, spectrum sharing between coexisting competing wireless systems like 802.11 and 802.16 is an upcoming challenge. To understand the characteristics of interference in such a heterogeneous scenario, an analysis of possible interference is presented and the performance of the legacy systems is evaluated. Then a spectrum sharing concept is proposed which can generally be applied to both systems. In this paper, the proposed concept is adapted for coexisting 802.16 and 802.11e based systems, which is an extention of 802.11. In this case, the 802.11e Hybrid Coordination Function (HCF) Controlled Channel Access (HCCA) is extended to provide a protocol for airtime sharing. Simulation results are presented showing that the proposed algorithm provides excellent improvement of system performance in the context of capacity and channel utilization compared to the case without applying any spectrum sharing method.
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摘要 :
Due to the high scarcity and high costs of radio spectrum, more and more radio services are occupying unlicensed bands for their operation. Due to this, there is a high risk of destructive interference which degrades the performan...
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Due to the high scarcity and high costs of radio spectrum, more and more radio services are occupying unlicensed bands for their operation. Due to this, there is a high risk of destructive interference which degrades the performance and fails to support Quality of Service (QoS) for systems operating in these bands. IEEE 802.11 based wireless networks are already operating in unlicensed band. A new competitor for unlicensed bands is the IEEE 802.16 based wireless metropolitan area network. Therefore, spectrum sharing between coexisting competing wireless systems like 802.11 and 802.16 is an upcoming challenge. To understand the characteristics of interference in such a heterogeneous scenario, an analysis of possible interference is presented and the performance of the legacy systems is evaluated. Then a spectrum sharing concept is proposed which can generally be applied to both systems. In this paper, the proposed concept is adapted for coexisting 802.16 and 802.11e based systems, which is an extention of 802.11. In this case, the 802.11e Hybrid Coordination Function (HCF) Controlled Channel Access (HCCA) is extended to provide a protocol for airtime sharing. Simulation results are presented showing that the proposed algorithm provides excellent improvement of system performance in the context of capacity and channel utilization compared to the case without applying any spectrum sharing method.
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The development of IEEE activity and formation of new Sections and Chapters in Central and Eastern Europe following the fall of the “Iron Curtain” and the dismantling of the Berlin Wall is outlined, from the personal perspective a...
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The development of IEEE activity and formation of new Sections and Chapters in Central and Eastern Europe following the fall of the “Iron Curtain” and the dismantling of the Berlin Wall is outlined, from the personal perspective and experiences of the author.
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摘要 :
The development of IEEE activity and formation of new Sections and Chapters in Central and Eastern Europe following the fall of the “Iron Curtain” and the dismantling of the Berlin Wall is outlined, from the personal perspective a...
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The development of IEEE activity and formation of new Sections and Chapters in Central and Eastern Europe following the fall of the “Iron Curtain” and the dismantling of the Berlin Wall is outlined, from the personal perspective and experiences of the author.
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A critical element of the proposed iNET architecture is the development of a telemetry network that provides two-way communication between multiple nodes on both the ground and in the air. Conventional airborne telemetry is based ...
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A critical element of the proposed iNET architecture is the development of a telemetry network that provides two-way communication between multiple nodes on both the ground and in the air. Conventional airborne telemetry is based on IRIG-106 Chapter 4 and provides only a serial streaming data path from the aircraft to the ground. The network-centric architecture of iNET requires not only a duplex communication link between the ground and the test article, but also a communication link that provides higher bandwidth performance, higher spectrum efficiency, and a transport environment that is capable of fully packetized Internet Protocol. This paper describes the development path followed by TTC in the implementation of its nXCVR-2000G, an OFDM 802-11a-based iNET-ready IP transceiver.
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摘要 :
A critical element of the proposed iNET architecture is the development of a telemetry network that provides two-way communication between multiple nodes on both the ground and in the air. Conventional airborne telemetry is based ...
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A critical element of the proposed iNET architecture is the development of a telemetry network that provides two-way communication between multiple nodes on both the ground and in the air. Conventional airborne telemetry is based on IRIG-106 Chapter 4 and provides only a serial streaming data path from the aircraft to the ground. The network-centric architecture of iNET requires not only a duplex communication link between the ground and the test article, but also a communication link that provides higher bandwidth performance, higher spectrum efficiency, and a transport environment that is capable of fully packetized Internet Protocol. This paper describes the development path followed by TTC in the implementation of its nXCVR-2000G, an OFDM 802-11a-based iNET-ready IP transceiver.
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