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Vehicles in Intelligent Transportation System (ITS) can communicate with other vehicles or roadside unit (RSU) within a specific area. In ITS, different services have different requirements of QoS. For delay-tolerant services, a longtime fairness should be guaranteed, which means vehicles with different speeds should have the same chance to communicate with RSU. What's more, the throughput is a key...
Space information networks promise encouraging prospects in areas of detection, communication and location. In this paper, node and link evaluation algorithms are proposed to provide reconfiguration basis for such networks. Given that space information networks operate in multi-application environments and offer diverse services, we take connectivity and availability into comprehensive consideration...
Carrier aggregation technique plays a significant role in LTE-A to meet the need of higher data rate, it applies a number of frequency bands to transmit signals and therefore there is a promising research arising that it is indispensable to study the characteristics of the signal at different frequencies at a receiver, in order to make the receiving equipment adjusted to the discrepancy of the receiving...
In this work, we establish a general framework for investigating statistical QoS provisioning in mobile ad hoc networks. Though the throughput and average delay in wireless ad hoc works have been has been intensively studied in the literature, statistical delay guarantee provisioning in large scale ad hoc networks has not received enough attention. A realtime application, e.g., interactive game and...
Cooperative active safety applications in WAVE employ periodic beacon broadcasting for status advertisement. High beacon rate enables each vehicle sense the traffic situation from its vicinity promptly. This timely information may assist the driver for safer driving experience. However, high beacon rate will congest the wireless medium due to the contention-based IEEE 802.11p MAC. In this paper, an...
Null convention logic units are the most important logic units in asynchronous circuits. This paper proposes a new realization of null convention logic unit based on semi-static threshold gates. Through adding a cutoff transistor into the pull-up path, the leakage current can be greatly decreased, which can resolve the issue of leakage current increment in deep submicron technology. Comparisons are...
This paper reveals a new view on mobility management based on the relations between communication users. Communication users with close relation contact each other more frequently than other users, which dominate majority of total communication traffic. The performance of these users impact the overall communication system severely. We design a new mobility management mechanism, “push-and-cache”,...
With the increasing NRE cost of advanced process technologies, reconfigurable devices receive great attention in small and medium volume IC designs. However, lower logic utilization and slower timing performance limit the efficacy of FPGA and CPLD. In this paper, we propose an efficient hybrid LUT/SOP reconfigurable design style to exploit both the advantages of LUT-cell and SOP-cell for circuit design...
With continuously development of the ad hoc network technology, integrating with other networks becomes one of the trends. Due to the involvement of other networks, routing strategy needs to change with the development. To considerate the key factors whose influence are serious comprehensively is needed. For those reasons, this paper proposes a novel concept of the optimal routing function, which...
In this paper, a class of switched neutral systems composed of a finite number of nonlinear neutral systems is discussed. Under the condition of all the subsystems being stability, stability conditions for nonlinear switched neutral systems are established in terms of multiple Lyapunov functionals and functions, respectively. The stability conditions in terms of multiple functions are obtained by...
Based on some practical problems in industrial engineering, a species of two-unit parallel repairable system model is introduced in this paper. The prominent feature of the model is described as follows: if a repair time is sufficiently short (less than some threshold value) that does not affect the system operation, i.e. the effect could be ignored, the system can be considered as being operating...
An arbitrary-input pulsewidth control loop (AIPWCL) based on a delay-locked loop with duty cycle corrector is presented. The duty cycles of the clock signals can be adjusted from 10% to 90% in 10% steps. The proposed AIPWCL is designed and simulated by using tsmc 0.13 mum CMOS process. The operation frequency range is from 770 MHz to 1.05 GHz. The locking time of AIPWCL is less than 40 ns within the...
In recent years, pre-fabricated design styles grow up rapidly to amortize the mask cost. However, the interconnection delay of the pre-fabricated design styles slows down the circuit performance due to the high capacitive load. In this paper, we propose a technique to insert dual-rail wires for pre-fabricated design styles. Furthermore, we propose an effective dual-rail insertion algorithm to reduce...
A pulsewidth control loop (PWCL) based on a delay-locked loop (DLL) is presented in the paper. The duty cycle of the proposed PWCL can be adjusted from 10% to 90% in 10% step. The circuit is designed and simulated using TSMC 0.13 mum CMOS process. The operation frequency range is from 770 MHz to 1.43 GHz. The locking time of DLL is less than 15 ns within the operation frequency band. The power dissipation...
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