Abstract: A time synchronization method between nodes in a network and an apparatus for implementing the same, the time synchronization method including: measuring a value of a propagation time from a slave node to a master node using a time stamp for each of one or more predetermined time units; calculating an estimate of an actual propagation time using the one or more measured values and a sliding window; and computing an offset using a message transmission time corresponding to a sending of a message from the master node, a message receipt time corresponding to an arrival of the message at the slave node, and the estimate of the actual propagation time.

Abstract: A proximity control method for transmitting a content and a network node using the proximity control method is provided. A proximity control method for transmitting a content performs a different proximity control mechanism depending on each of a single proximity control (SPC) domain, a mixed proximity control (MPC) domain, and a network-based service domain, and each of nodes performs the different proximity control mechanism based on a physical distance from a neighboring node, the nodes being comprised in the SPC domain, the MPC domain, and the network-based service domain.

Abstract: An audio/vide bridging (AVB) system using an extended AVB reservation protocol, and a resource reservation method are provided wherean AVB system using an extended AVB reservation protocol includes an egress device for transmitting a Generic Attribute Registration Protocol (GARP) or Multiple Registration Protocol (MRP) message comprising an AVB stream identifier or an application stream identifier to a relay device, the relay device for registering the AVB stream identifier or the application stream identifier according to the GARP/MRP message, and transmitting the GARP/MRP message comprising the application stream identifier, to an ingress device, and the ingress device for allocating the AVB stream identifier corresponding to the application stream identifier via the GARP/MRP message comprising the application stream identifier, and transmitting a reservation signal to the relay device.

Abstract: Provided is a method of transmitting an Ethernet frame via a network bridge, the method includes receiving a frame header from a previous node connected to the network bridge; receiving a header cyclic redundancy check (CRC) flag and header CRC with respect to the frame header from the previous node; determining whether to forward the Ethernet frame including the frame header by referring to the header CRC flag and the header CRC; and forwarding the Ethernet frame from the previous node to a next node connected to the network bridge according to the determination.

Abstract: Provided are a guaranteed services method and apparatus in bridged LAN. streams are transmitted through bridges to a plurality of listener stations in a distributed network, and each bridge performs filtering, stream group registration and authentication for the streams. Accordingly, quality of service (QoS) in a distributed network can be improved. Furthermore, streams to the plurality of listener stations can be guaranteed.

Abstract: In this application, the invention is a novel heuristic mechanism of working path and backup path reservation for highly utilizable WDM mesh networks, which we call dynamic-network adapted cost selection (DAC-selection) mechanism. One of its characteristics is simple traffic distribution mechanism, and the performance of DAC-selection mechanism is superior to that of Random selection (R-selection) and Advanced Combined Min-cost selection (ACM-selection) mechanism. DAC-selection mechanism provides simple cost function by assigning proper weights to each component of the cost function and the total cost is obtained by just summing up the individual cost. Therefore, it is possible to select a best pair of working path and backup path which consumes least wavelength for reservation.