This paper addresses the issue of real-time data transmission in vehicles to roadside （V2R） environment by the hybrid coordination function （HCF） of controlled channel access （HCCA） specified by the IEEE 802.1 l...This paper addresses the issue of real-time data transmission in vehicles to roadside （V2R） environment by the hybrid coordination function （HCF） of controlled channel access （HCCA） specified by the IEEE 802.1 lp standard. HCCA is one of the medium access mechanisms in the IEEE 802.11 standard, and uses the polling scheme similar to the point coordination function （PCF） to provide reliable quality of service （QoS）, which may cause resource overshooting and high time consuming. This paper tries to improve the performance of the HCCA polling scheme and designs new data transmission scheduling scheme. The simulation results of the proposal are compared with those of the standard strategy. Simulation results demonstrate that the improved HCCA has lower delay, loss rate, and higher throughput than those of the standard one.展开更多
There are two types of base stations in the long term evolution （LTE） wireless networks, home eNodeB （HeNB） and eNodeB （eNB）. It is critical to achieve seamless handovers between the HeNB and the eNB in order to...There are two types of base stations in the long term evolution （LTE） wireless networks, home eNodeB （HeNB） and eNodeB （eNB）. It is critical to achieve seamless handovers between the HeNB and the eNB in order to support mobility in the LTE networks. A handover from an eNB/HeNB to a new eNB/HeNB, suggested by the third generation partnership project （3GPP）, requires distinct procedures for different mobility scenarios, which will increase the system complexity. Besides, the existing handover schemes for other wireless networks are not suitable for the mobility scenarios in the LTE networks due to their inherent vulnerabilities. In this paper, we propose a fast and secure handover authentication scheme, which is to fit in with most of the mobility scenarios in the LTE networks. Compared with other handover schemes, our scheme cannot only achieve a simple authentication process with desirable efficiency, but also provide several security features including perfect forward/backward secrecy （PFS/PBS）, which have never been achieved by the previous works. The experiment results and formal verification by using the automated validation of internet security protocols and applications （AVISPA） tool show that the proposed scheme is efficient and secure against various malicious attacks.展开更多
基金supported by the National Natural Science Foundation of China (61072063, NSFC-11-01-01)
文摘This paper addresses the issue of real-time data transmission in vehicles to roadside （V2R） environment by the hybrid coordination function （HCF） of controlled channel access （HCCA） specified by the IEEE 802.1 lp standard. HCCA is one of the medium access mechanisms in the IEEE 802.11 standard, and uses the polling scheme similar to the point coordination function （PCF） to provide reliable quality of service （QoS）, which may cause resource overshooting and high time consuming. This paper tries to improve the performance of the HCCA polling scheme and designs new data transmission scheduling scheme. The simulation results of the proposal are compared with those of the standard strategy. Simulation results demonstrate that the improved HCCA has lower delay, loss rate, and higher throughput than those of the standard one.
基金supported by the National Basic Research Program of China(2012CB316100)the National Natural Science Foundation of China(61102056)+2 种基金the Fundamental Research Funds for the Central Universities(K50511010001)the National 111 Project(B08038)the Program for Changjiang Scholars and Innovative Research Team in University(PCSIRT1078)
文摘There are two types of base stations in the long term evolution （LTE） wireless networks, home eNodeB （HeNB） and eNodeB （eNB）. It is critical to achieve seamless handovers between the HeNB and the eNB in order to support mobility in the LTE networks. A handover from an eNB/HeNB to a new eNB/HeNB, suggested by the third generation partnership project （3GPP）, requires distinct procedures for different mobility scenarios, which will increase the system complexity. Besides, the existing handover schemes for other wireless networks are not suitable for the mobility scenarios in the LTE networks due to their inherent vulnerabilities. In this paper, we propose a fast and secure handover authentication scheme, which is to fit in with most of the mobility scenarios in the LTE networks. Compared with other handover schemes, our scheme cannot only achieve a simple authentication process with desirable efficiency, but also provide several security features including perfect forward/backward secrecy （PFS/PBS）, which have never been achieved by the previous works. The experiment results and formal verification by using the automated validation of internet security protocols and applications （AVISPA） tool show that the proposed scheme is efficient and secure against various malicious attacks.
