Synchronizer

About: Synchronizer is a research topic. Over the lifetime, 4903 publications have been published within this topic receiving 46207 citations.

Agile network protocol for secure communications with assured system availability

Abstract: A plurality of computer nodes communicate using seemingly random Internet Protocol source and destination addresses. Data packets matching criteria defined by a moving window of valid addresses are accepted for further processing, while those that do not meet the criteria are quickly rejected. Improvements to the basic design include (1) a load balancer that distributes packets across different transmission paths according to transmission path quality; (2) a DNS proxy server that transparently creates a virtual private network in response to a domain name inquiry; (3) a large-to-small link bandwidth management feature that prevents denial-of-service attacks at system chokepoints; (4) a traffic limiter that regulates incoming packets by limiting the rate at which a transmitter can be synchronized with a receiver; and (5) a signaling synchronizer that allows a large number of nodes to communicate with a central node by partitioning the communication function between two separate entities.

Complexity of network synchronization

Abstract: The problem of simulating a synchronous network by an asynchronous network is investigated. A new simulation technique, referred to as a synchronizer, which is a new, simple methodology for designing efficient distributed algorithms in asynchronous networks, is proposed. The synchronizer exhibits a trade-off between its communication and time complexities, which is proved to be within a constant factor of the lower bound.

Synchronizer clutch assembly for multiple ratio gearing

Abstract: A synchronizer clutch assembly for a manual transmission comprising a synchronizer hub carried by a torque delivery shaft and including a cone clutch member carried by a gear forming a part of the transmission gearing and a synchronizer blocker ring adapted to be made of forged steel, the synchronizer assembly including a shiftable clutch sleeve that is engageable with at least one spring element secured to the synchronizer blocker ring whereby the blocker ring cone clutch frictionally engages the cone clutch of the gear upon movement of the sleeve toward an engagement position until the rotary motion of the gear is brought into synchronism with the rotary motion of the shaft.

Blind Equalization and Carrier Recovery Using a "Stop-and-Go" Decision-Directed Algorithm

Abstract: We show that the standard decision-directed estimatedgradient adaptation algorithm for joint MSE equalization and carrier recovery, normally utilized in the open-eye condition, can be turned into an algorithm providing effective blind convergence in the MSE sense, usable in the closed-eye startup phase with no need of a known training sequence. This is obtained by means of a simple flag telling both the equalizer and the synchronizer whether the current output error with respect to the decided symbol is sufficiently reliable to be used. If not, adaptation is stopped for the current iteration. In the paper, this "stopand-go" decision-directed algorithm is presented for both linear and decision-feedback MSE complex equalizers with joint blind carrier recovery. Simulation results demonstrate the effectiveness of the proposed technique.

An optimal synchronizer for the hypercube

Abstract: The synchronizer is a simulation methodology introduced by Awerbuch [J. Assoc. Comput. Math., 32 (1985), pp. 804–823] for simulating a synchronous network by an asynchronous one, thus enabling the execution of a synchronous algorithm on an asynchronous network. In this paper a novel technique for constructing network synchronizers is presented. This technique is developed from some basic relationships between synchronizers and the structure of a t-spanning subgraph over the network. As a special result, a synchronizer for the hypercube with optimal time and communication complexities is obtained.