Based on the research of large quantity, multi data and real-time intelligent monitoring of lighting equipment in the environment of Internet of things, this paper proposes a segmented lighting equipment monitoring sy...
详细信息
ISBN:
(纸本)9781728191461
Based on the research of large quantity, multi data and real-time intelligent monitoring of lighting equipment in the environment of Internet of things, this paper proposes a segmented lighting equipment monitoring system based on polling algorithm. With the help of effective communication protocol, the system designs a polling algorithm for data acquisition to realize long-term continuous and real-time tracking of lighting equipment, which is conducive to timely detection of lighting equipment operation faults in the monitoring process, and improves the monitoring efficiency and level.
Open access network (OAN) is an efficient converged network that can effectively connects several service providers in a ubiquitous city (u-City). Passive optical network (PON) provides enough bandwidth to support hug...
详细信息
ISBN:
(纸本)9781509056279
Open access network (OAN) is an efficient converged network that can effectively connects several service providers in a ubiquitous city (u-City). Passive optical network (PON) provides enough bandwidth to support huge data traffic of the modern OAN of u-City. However, some service providers in the u-City contain high priority (HP) traffic while other service providers comprise low priority traffic, i.e., best efforts (BE) traffic. This HP traffic means the real time traffic, e.g., voice over internet protocol (VoIP), IPTV, video on demand (VoD), video conferencing etc. The conventional polling algorithms of the PON cannot provide differentiated service for data traffic of different priority groups. These polling algorithms also require almost same back off delay for both the HP and BE data traffic. So the PON-based OAN with the conventional polling algorithms are not enough to provide the real time service for the HP traffic. In this paper, we propose a new multi-threaded dynamic bandwidth allocation (DBA) algorithm for the PON-based OAN that provides lower delay for the HP traffic by reducing the back off delay in every polling cycle. The proposed algorithm is called thread guaranteed bandwidth allocation (TGBA) algorithm. Performance of the proposed TGBA algorithm is evaluated by numerical simulations in terms of end-to-end packet delay and pre-transmission delay. The proposed scheme provides lower end-to-end and pre-transmission delays for the HP traffic than those of the conventional single-threaded and multi-threaded DBA schemes.
In this paper,we propose a novel polling algorithm to decrease the number of idle slots and collission slots during the polling cycle by evaluating the bandwidth request of the subscribe stations(SSs) in the next poll...
详细信息
In this paper,we propose a novel polling algorithm to decrease the number of idle slots and collission slots during the polling cycle by evaluating the bandwidth request of the subscribe stations(SSs) in the next polling cycle for broadband wireless access(BWA) *** firstly analyze the feature of silent time intervals and deduce the Hurst index which symbolizes the degree of self-similarity and long-relative *** we represent the inactive OFF time intervals by the Pareto model and estimate the shape parameterαby the group measured *** we can evaluate the transmission probability of a silent SS before the next polling cycle. By this algorithm,we can find the optimal transmission opportunities for the base station(BS) to achieve the least collision or void timeslots in order to achieve the largest bandwidth *** theoretical analysis and simulation results show that this polling algorithm can improve the performance for BWA system.
暂无评论