摘要:
Provided is a method for setting a security channel between an OLT and at least one ONU in an EPON. In detail, a channel is generated by which the OLT makes a reciprocal security capability agreement with the ONU that wants to set a security channel in a discovery interval and then automatically registers the ONU with the security capability agreement. The security channel is set by which the OLT distributes an encryption key for the security with the ONU completed with the security capability agreement. A renewal point of the encryption key is shared by transmitting a message indicative of a time to change the encryption key between the OLT and the ONU both completed with the encryption key distribution.
摘要:
An apparatus for providing I-centric services using a service delivery platform which is user-centric layered and a service providing method using the same are provided. The apparatus includes a media service platform providing an enabler obtained by abstracting resources and an I-centric enabler, a service creation environment providing a layered service creation and execution environment for each user, and a service execution environment. A personal user, a third party service provider and a service provider can create and provide various personalized services using the media service platform, the service creation environment and the service execution environment.
摘要:
Provided is a TDMA (time division multiple access) PON (passive optical network) OLT (optical line terminal) system for a broadcast service, including packet processor determining information according to types of frames (unicast, multicast, and broadcast frames) and a switch output port using header information (an IP address of a packet header, MAC (medium access control) addresses of Ethernet frames, and the like) of data received from an external node or the ONT (optical network terminal) and attaching the information to header parts of the frames to generate second data, a switch copying the second data by a predetermined number of times according to a transmission method and transmitting the second data to a corresponding destination output port according to the identification codes, M TDMA PON MAC processors removing the identification codes added to the second data and converting the second data into TDMA PON frames, and M optical transceivers converting the TDMA PON frames into optical signals and transmitting the optical signals to an ONT.
摘要:
Provided are method and apparatus for dynamically allocating unlink bandwidth in Ethernet PON. In the method and apparatus, report value, which are received for each logical link identifications (LLID), is controlled to be less than a maximum gate value set for each LLID in sequence for all of LLIDs without a predetermined interval. A gate having a length corresponding to the restricted report value is generated. LLIDs are grouped into classes and processing is done class by class. For each class processing, if maximum processing time is reached or maximum total allocation is reached, the processing is switched to a lower class. Also each class processing, if any higher class has its maximum yield processing time or maximum yield allocated gate reached, the processing is switched to that higher class.
摘要:
Provides is a method for processing a multicast packet received in a system for simultaneously providing virtual interface-based layer-2 multicast switching and layer-3 multicast routing. When a destination MAC address of a received Ethernet frame is a multicast MAC address, a VLAN-based layer-2 multicast switching function is performed. When a destination IP address of a received Ethernet frame is a multicast IP address, a virtual interface-based layer-3 multicast routing function is simultaneously performed within the same system.
摘要:
An apparatus and method for managing traffic using a VID in EPON are provided. The apparatus includes a MAC lookup table, a service classification policy table, a service control policy table, a MAC lookup unit, a first and second classification module, a VID learning unit and a first and second service control module. The apparatus classifies all packets of up/downlink transmission flow using a VID into a VID unit, through the first and second classification modules and manages traffic thereof according to the parameters thereof through the first and second service control modules. Accordingly, a large amount of traffic for numerous subscribers and services thereof, which was cannot be processed by the limitation on embodying a typical switch or router, can be processed according to the present invention.
摘要:
Disclosed herein is a cylindrical battery constructed in a structure in which a crimp region, at which a cap assembly is mounted to an open upper end of a cylindrical container having an electrode assembly mounted therein, is formed at the upper end of the container, wherein the crimp region is constructed in a structure in which the upper end of the crimp region is gently bent, such that the crimp region surrounds a gasket located at the inside of the crimp region, a bent front end is continuously bent twice to press the gasket, while the bent front end extends inward, such that a radius of curvature (R1) of the first bent area is less than a radius of curvature (R2) of the second bent area. The cylindrical battery according to the present invention is constructed such that the upper end of the crimp region of the cylindrical container is continuously bent twice in a predetermined condition. Consequently, when external physical impacts, such as vibration or dropping, are applied to the battery, and when the internal pressure of the battery increases, the sealed portions are restrained from being separated from each other, thereby preventing the leakage of an electrolyte and thus greatly improving the safety of the battery. Furthermore, it is possible to minimize the deformation of the container, such as wrinkles, which may be formed due to failure to form the bent area gently when bending the front end of the crimp region with a small radius of curvature.
摘要:
The present invention relates to a media access controller, and more particularly, to a media access controller which can adjust operational parameters according to a setting environment of a packet transmission system by re-setting the operational parameters of the media access controller by an external source. A media access controller (MAC) according to an aspect of the present invention comprises: a carrier analyzer, which generates a timeslot using a carrier sense signal input from a modem of a station and outputs a type and a timeslot of a received frame; a collision resolution handler, which grants medium access by monitoring for collisions between stations and between itself and another station using a collision resolution algorithm; a random number generator, which generates a random number (RndNum) based on a MAC address value when a collision between itself and another station occurs; a transmission on generator, which receives a transmission ready (TxReady) signal and a timeslot to be transmitted from a frame controller of the system and generates a data transmission on (TxDataOn) signal and a transmission frame type (TxSigType) signal; and a parameter setting unit, which adjusts operational parameters of the MAC to be suitable for a setting environment of the station.
摘要:
A time division multiplex (TDM)/wavelength division multiple access (WDMA) passive optical network (PON) device includes a base station terminal, a wavelength splitter, and a subscriber terminal optical transceiver. The base station terminal includes a transmitter, an optical circulator transmitting the optical signals output from the transmitter to an optical distribution network, and a receiver demultiplexing wavelength division multiplexed upstream signals from the optical distribution network through the optical circulator. The wavelength splitter splits the downstream signals from the base station terminal to subscriber ports corresponding to wavelengths and multiplexes the optical signals received from each of the subscriber ports to the base station terminal. The subscriber terminal optical transceiver receives the downstream signals from the wavelength splitter and reuses the received downstream signals as optical sources for upstream signals.
摘要:
A method for managing a service bandwidth by a customer port and an EPON system using the same are provided. In order to manage the service bandwidth by a customer, ONU and ONT allocate a service class according to a combination of information about a customer that receives a service, and a service type and a service priority of a service provided to a customer, allocate a bandwidth according to each service class and control a uplink bandwidth or a downlink bandwidth according to a service class. Also, a system manger collects information about a service provider, a service provided from a service provider, a customer that receives a service, and information for classifying a service. After collecting, the system manager provides the collected information to the ONU and the OLT.