EXPANSE Software for Distributed Call and Connection Control
نویسندگان
چکیده
The Experimental ATM and Network Services Environment (EXPANSE) prototype provides an experimental testbed for multimedia, multiparty telecommunications services over heterogeneous communications networks. The EXPANSE software architecture supports the functional separation of call and connection control. At the call control layer an object-oriented, transaction-based call model provides for the coordination of the negotiations among users for the establishment, modification and disconnection of telecommunications services. The connection control layer provides an object-oriented protocol for the dynamic establishment, modification and release of network connections which include the control and allocation of network resources required for multimedia, multiparty services. The EXPANSE software includes an Application Programming Interface (API) to the signalling protocol at the call control level. The API provides a uniform and powerful interface to the call model and allows different applications to coordinate the control of local resources and session state.
منابع مشابه
Acceptor-Connector An Object Creational Pattern for Connecting and Initializing Communication Services
The Acceptor-Connector design pattern decouples connection establishment and service initialization in a distributed system from the processing performed once a service is initialized. This decoupling is achieved with three components: acceptors, connectors, and service handlers. A connector actively establishes a connection with a remote acceptor component and initializes a service handler to ...
متن کاملA distributed control strategy for wireless ATM networks
Cellular networks are expected to be upgraded to offer Personal Communication Services (PCS). The mobility management and wireless call control approach used in cellular networks are currently being proposed for use in PCS networks. Recent work indicates that both the signaling load and database update rates caused by these mobility management and call control procedures will increase significa...
متن کاملA Distributed Control Architecture for Autonomous Operation of a Hybrid AC/DC Microgrid System
Hybrid AC/DC microgrids facilitate the procedure of DC power connection into the conventional AC power system by developing the distributed generations (DGs) technologies. The conversion processes between AC and DC electrical powers are more convenient by hybrid systems. In this paper, an energy management system (EMS) for a hybrid microgrid network is proposed due to the optimal utilization of...
متن کاملVoltage Control and Load Sharing in a DC Islanded Microgrid Based on Disturbance Observer
Increasing DC loads along with DC nature of distributed energy resources (DERs) raises interest to DC microgrids. Conventional droop/non-droop power-sharing in microgrids suffers from load dependent voltage deviation, slow transient response, and requires the parameters of the loads, system and DERs connection status. In this paper, a new nonlinear decentralized back-stepping control strategy f...
متن کاملConnection Closures Adding Application-deened Behaviour to Network Connections
New techniques in the implementation of out-of-band control in ATM networks are causing both industry and research laboratories to look again at the whole question of ATM signalling. These techniques devolve the control from the network devices into a higher level distributed processing environment, resulting in simpler network devices and more exible control architectures. This paper takes thi...
متن کامل