Abstract:
PURPOSE: A wireless LAN(Local Area Network) AP(Access Point) connection device is provided to efficiently operate a system by performing a MAC(Media Access Control) function. CONSTITUTION: A wireless module interface unit(408) provides an interface with a wireless LAN AP function unit(421) which performs a MAC with respect to a plurality of media. A control processor(410) connects to the wireless module interface unit(408), and controls and manages a main processor(423) which supports a wired speed in a system. The control processor(410) performs the MAC function of the wireless LAN AP function unit(421). The wireless module interface unit(408) connects to the control processor(410) through a PCI(Peripheral Component Interconnect) bus(409).
Abstract:
PURPOSE: An apparatus for inserting and extracting an optical signal is provided to make its structure simple in comparison with an optical circulation apparatus by utilizing an optical divide coupling device and an optical fiber Bragg grating in place with an optical circulation apparatus and a Bragg grating. CONSTITUTION: An apparatus(400) for inserting and extracting an optical signal includes an optical inputting and extracting block, an optical transmitting and reflecting block and an optical signal insertion/extracting block. The optical inputting and extracting block inputs an optical signal of wavelength divisional multiplex multi-wavelength and outputs the optical signal by dividing the optical signal corresponding to the set coupling ratio among the inputted multi-wavelength optical signals. The optical inputting and extracting block extracts the optical signal of a specific wavelength reflected from the outputted optical signals. The optical transmitting and reflecting block reflects the optical signal of the specific wavelength among the multi-wavelengths of the optical signals outputted from the optical inputting and extracting block. The optical transmitting and reflecting block transmits the optical signal of the remaining wavelengths. And, the optical signal insertion/extracting block outputs the optical signal by dividing the optical signal corresponding to the set coupling ratio among the inputted optical signals of multi-wavelengths and inserts the optical signal having a specific wavelength.
Abstract:
PURPOSE: A serial bus type form recognizing and alarming device supporting a hierarchical structure is provided to increase recognition form kinds and failed state collections as supporting the hierarchical structure, and to duplex form recognition by exactly perceiving a data path failure, thereby improving reliability. CONSTITUTION: The first transmitters(201) report self board IDs and board failed state information through the first serial buses(211). The second transmitters(210) collect the transmitted board IDs and the failed state information, report the collected information through the second serial bus(212), and transmit self IDs. A recognizer(220) collects the transmitted board IDs and the failed state information, confirms forms and states of each PBA(Printed circuit Board Assembly)(200), and reports the collected information to a terminal(230). When the recognizer(220) calls the board IDs and the failed state information, the second transmitters(210) connect the first serial buses(211) with the second serial bus(212), and the first transmitters(201) transmit the information to the recognizer(220).
Abstract:
PURPOSE: A line interface module in a router and a routing system having the same are provided to integrate many line interfaces into a single line interface module and to execute fault management, inter-processor connection, switch interfacing, etc., through the line interface module. CONSTITUTION: A line interface module(10) consists of a sub switching card(13) and a backplane(14). The sub switching card(13) comprises line cards(11,12), a sub switch(131), and switch input-output buffers(133,134). The backplane(14) connects between the line cards(11,12) and the sub switching card(13). Each line card(11,12) comprises physical link ports(111,114,121,124), physical layer interface parts(112,15,122,125), and network processors(113,116,123,126). The network processors(113,116,123,126) process the packet switching and forwarding function of an OSI(Open System Interconnection) 3/4+ layer. The sub switch(131) executes sub switching to target data channels for the data supplied from the line cards(11,12) and the switch input-output buffers(133,134). The switch input-output buffers(133,134) buffer the data inputted/outputted between the switch of a routing system and the sub switch(131).
Abstract:
PURPOSE: A high speed router system is provided to distribute a portion of an IP(Internet Protocol) packet and a portion of an Internet control message in a line processor, thereby reducing processing load of a non-forwarding packet concentrated on a main processor. CONSTITUTION: Line processor nodes(101) comprise as follows. External physical link connection blocks(1011) are physically connected to external networks. Network processor blocks(1012) perform routing lookup processes after interpreting destination addresses of packets, and forward the routing lookup processes. Microprocessor blocks(1013) communicate with a main processor node(102) with configuration information of the line processor nodes(101). The main processor node(102) consists of a microprocessor block(1021) for communicating with the line processor nodes(101) and processing a routing protocol collecting routing information.
Abstract:
PURPOSE: A method for adding or deleting line card and line interface information on on-line in a distributed processing high-speed router is provided to mount a line card on on-line without stopping the service of a system, install a corresponding line interface, and remove the corresponding line interface for dismounting the line card. CONSTITUTION: If an operator inputs a line card addition command in a standby state and a terminal of the operator receives the line card addition command(S403), the terminal checks whether line card information requested by the operator previously exists in a database(S404). If a line card does not exist, the terminal adds line card addition information requested by the operator in the database(S405). The terminal outputs that the addition of the line card is normal for informing the operator that the line card addition command is normally performed(S406). If the operator confirms that the addition of the line card is normal, the operator mounts the line card on a system(S407). The operator loads a program necessary for operation and confirms whether the line card is normally operated(S408).
Abstract:
PURPOSE: An input control device and method in a packet switch system is provided to increase the usability of a network system and improve the performance of a high-speed packet switch system, without the necessity of increasing internal operation speed, by fairly switching packets according to the priority order. CONSTITUTION: An input control device and method in a packet switch system is composed of the first demultiplexer(4200), the first and second control parts(4210,4220), the first and second multiplexers(4270a,4270b), a port selection control part(4280), and the third multiplexer(4290). The first demultiplexer(4200) divides inputted packets into unicast packets and multicast or broadcast packets and outputs the divided packets to the first and second control parts(4210,4220). The first control part(4210) consists of the second demultiplexer(4231a) and the first and second storage parts(4240a,4240b). The second demultiplexer(4231a) separates the unicast packets inputted from the first demultiplexer(4200) into real-time traffics and non-real time traffics. The first and second storage parts(4240a,4240b) classify the real-time and non-real time traffics outputted from the second demultiplexer(4231a) by output ports and outputs them selectively. The second control part(4220) is composed of a selector(4232), the third demultiplexer(4231b), the third and fourth storage parts(4250a,4250b), and the fifth and sixth storage parts(4260a,4260b). The first multiplexer(4270a), connected to the first storage part(4240a) and the fifth storage part(4260a), selects the real-time traffics outputted from the first storage part(4240a) and the fifth storage part(4260a). The second multiplexer(4270b), connected to the second storage part(4240b) and the sixth storage part(4260b), selects the non-real time traffics outputted from the second storage part(4240b) and the sixth storage part(4260b). The third multiplexer(4290) selects one between the real-time packet outputted from the first multiplexer(4270a) and the non-real time packet outputted from the second multiplexer(4270b) and transfers it to a switch fabric. The port selection control part(4280) executes communication for the port arbitration of a crossbar scheduler in the switch fabric.
Abstract:
PURPOSE: A double modulation and demodulation high frequency wave transmitting and receiving device for commonly implementing RF is provided to allow a plurality of signals of different modulation and demodulation methods to be transmitted by the same RF. CONSTITUTION: A double modulation and demodulation high frequency wave transmitting and receiving device(100) for commonly implementing RF includes Gaussian frequency shift keying and quadrature phase shift keying base band signal control block(10), a radio frequency down stream conversion block(20), an RF local signal generation block(30), an RF upstream conversion block, a panel selection filter block(50), an intermediate filter down stream conversion block(60), an intermediate frequency local signal generation block(70), an intermediate frequency upstream conversion block(80), a bandpass filter(11), a switch(12), a plurality of switch drivers(13,14,15,16,17), a reception signal intensity detector(18) and a peak detector(19). In the double modulation and demodulation high frequency wave transmitting and receiving device(100), the digital signal inputted from the base band is converted into analog signal at the digital to analog converters. The high frequency components of in-phase and quadrature-phase signals outputted from the digital to analog converters are removed at the low pass filters and inputted to the I/Q modulators.
Abstract:
PURPOSE: An apparatus and a method for exchanging an IPC(Inter Processor Communication) message using an ethernet switching device are provided to install the ethernet switching device in a module matching backplane of an ATM(Asynchronous Transfer Mode) switch, construct an IPC message dedicated star ethernet network, and transmit and receive the IPC message using an ethernet switching method. CONSTITUTION: An ethernet switching device(112) switches a path of an IPC ethernet frame transmitted from a transmission side processor and transmits the IPC ethernet frame to a receipt side processor. Each processor connects to a star ethernet network centering around the ethernet switching device(112). The ethernet switching device(112) is embedded in a main processor module(110).
Abstract:
PURPOSE: A method for allocating a memory using multi-step division is provided to allocate sub blocks separated to each block as one storing region by assigning each sub block on the same position in the block to a same pointer value. CONSTITUTION: The memory is divided into a plurality of blocks by analyzing the value of a fixed allocation request size used as a basic unit of the allocation. Each block is uniformly divided into the sub blocks of the same number. Each sub block placed on the same order in the blocks is assigned by one pointer value. The sub blocks in each block, which is assigned by one pointer value, are allocated as one storing region.