Bus network

About: Bus network is a research topic. Over the lifetime, 7017 publications have been published within this topic receiving 97556 citations.

Portable casing to inform bus network users about waiting times at network busstops

Abstract: Portable box (10) informs user of a bus network of waiting times at the stops on the network. The device (10) includes a radio receiver (11,12) to receive information from a central management station which is updated from the buses themselves. Such information is used to determine the waiting time by a central processing unit (15). A screen (16) and keyboard (17) provides means for inputting questions and reading information. A bell (19) is provided which is used by the central processing unit to emit a warning as soon as the expected time of arrival as previously notified to the user changes significantly from the actual, new, time of arrival.

On the design of an optimal flexible bus dispatching system with modular bus units: Using the three-dimensional Macroscopic Fundamental Diagram

Abstract: This study proposes a novel flexible bus dispatching system in which a fleet of fully automated modular bus units, together with conventional buses, serves the passenger demand. These modular bus units can either operate individually or combined (forming larger modular buses with a higher passenger capacity). This provides enormous flexibility to manage the service frequencies and vehicle allocation, reducing thereby the operating cost and improving passenger mobility. We develop an optimization model used to determine the optimal composition of modular bus units and the optimal service frequency at which the buses (both conventional and modular) should be dispatched across each bus line. We explicitly account for the dynamics of traffic congestion and complex interactions between the modes at the network level based on the recently proposed three-dimensional macroscopic fundamental diagram (3D-MFD). To the best of our knowledge, this is the first application of the 3D-MFD and modular bus units for the frequency setting problem in the domain of bus operations. Numerical results show the improvements in the total system cost made by adjusting the number of combined modular bus units and their dispatching frequencies to the evolution of both, the car and the bus passenger demand. A comparison with the commonly used approach that considers only the bus system (neglecting the complex multimodal interactions and congestion propagation) reveals the value of the proposed modeling framework. Finally, a sensitivity analysis of the effect of the operating unit cost of modular bus units, the size of the bus network, and the size of the bus fleet sheds light on the robustness of the proposed optimization framework.

Selective voltage supply system for data network distributor

Abstract: In a data network distributor adapted to connect a plurality of data stations with each other directly, and with remote stations over a network bus, a selective voltage supply system allows units shared in common with the local data stations to be powered only as needed, and to draw power from the individual data stations requiring service. Individual power sources in each data station are connected to a common line through decoupling diodes and current limiting resistors, and the common line supplies a plurality of voltage supply units which are operative to supply power to commonly used units as needed, including transmitting and receiving units for the network bus, a data diversion device for diverting local communications from the network bus, and a common control circuit for data collision recognition.

Method and apparatus for identifying and controlling a target peripheral device in a multiple bus system

Abstract: An apparatus and method for controlling devices in a multiple bus system such as a system having two or more ISA type buses. Separate ISA bus controllers may be provided for each ISA bus, linked on a common bus system such as a PCI bus. One ISA controller may be designated as a primary ISA controller whereas other ISA controllers in the system may be designated as secondary ISA controllers. Each ISA controller in the system is provided with IRQ (interrupt request) enable bits to enable different interrupts for the corresponding ISA bus. Each secondary ISA controller outputs a signal IRQSER as a PCI sideband signal to the primary ISA controller to indicate which IRQs have been asserted on the respective ISA buses. The primary controller receives the IRQSER signal as well as the IRQ signals asserted on its own bus and converts these interrupt requests to PCI bus cycles. The primary bus controller may further provide a bit mask indicating which of a number of direct memory access channels are enabled for the primary bus controller. The primary controller receives direct memory access requests from the second bus system and generates a read or write cycle on the first bus system corresponding to outputs requests enabled by the bit mask.

Method of common transfer of digital, audio and control data on a common bus line; bus system for implementing the method and interface application in the method

Abstract: A bus system for the transfer of audio and control data on a common bus line of fiber optic cables (LWL) in a system of users is compatible with sources and sinks of audio data (2,2a,2b) and/or control and monitoring data (8,8a,8b). Each user is connected to the bus system by a standardized interface (6,6a,6b) circuited together in series via fiber optic cables (LWL A, LWL B) preferably closed to form a ring by means of a further fiber optic cable (LWL C). This bus system is suitable for being operated with an internationally standardized transfer format. The bus system is impervious to noise, can be produced at low cost and is exceptionally powerful. This bus system is particularly suitable for use in vehicles.