Abstract:
The system for providing various signal services in the electronic telephone exchanger includes a controller connected to a switch network. A common signal service circuit (30) is centralised by a protocol processor (32) controlling the signal services like R2 MFC, DTMF, continuity check tone, and audio signal tone, and a real time processors (33-36) exchanging messages to peripheral devices through the switch network for connecting the signal service to a call process control routine of a call processor (31).
Abstract:
위성통신시스템에서역방향링크패킷오류검출방법이개시된다. 역방향링크를통해패킷을수신하는위성통신장치에서수행되는역방향링크의패킷오류검출방법은, 역방향링크를통해수신된적어도하나의분할된패킷을조합하여제1 역방향링크패킷조합을생성하는단계및 제1 역방향링크패킷조합이생성된후에수신된적어도하나의제2 역방향링크패킷의분할정보와, 제1 역방향링크패킷조합의조합완성여부및 패킷처리상태정보중 적어도하나의정보를이용하여패킷의오류를판단하는단계를포함한다. 따라서, 수신된패킷의재조립오류로인한패킷손실을최소화할수 있다.
Abstract:
PURPOSE: An apparatus and a method for performing handover between different networks using location information and a mobile router are provided to supply an internet service in which a session is not disconnected to a fixed node. CONSTITUTION: A handover starting information storage unit(320) stores handover execution location information. A handover execution determining unit(330) determines whether a mobile router needs handover execution into a network of a different type from a connection network based on information stored in the handover starting information storage unit according to current location information grasped in the location information grasping unit. A handover performing unit(340) performs handover according to the determination result.
Abstract:
A handover method between heterogeneous network for preventing the disconnection of a session and packet loss is provided to control the handover between wireless network and satellite network by link up/down trigger signal. A mobile node positioned in a first network maintains a second network-connection interface in a sleep state(606). A first network service is supplied by activating a first network-connection interface(607). The second network linkup trigger signal is sensed as the mobile node moves to the second network side. The second network-connection interface is converted into the active state and the handover is performed. The mobile node performing handover receives the second network service through the activated second network-connection interface.
Abstract:
A handover method between heterogeneous networks using a link trigger signal in a mobile router having a multi-interface is provided to prevent the loss of packets and the disconnection of a session regardless of the moving speed of the mobile router which is within a rapid transit railway. While a mobile router positioned in the first network maintains the second network connection interface in the dormant state, it activates the first network connection interface(606). The first network service which the mobile router receives is delivered to a corresponding lower node(607). As the mobile router moves to the second network, if the second network link-up trigger signal is detected, the handover is performed since the second network connection interface is activated(608,609).
Abstract:
본 발명에 의한 이더넷 시스템의 패킷 성능 보장 장치 및 그 방법은 이더넷 패킷을 수신하여 제1제어신호에 따라 상기 이더넷 패킷의 헤더정보를 처리하여 상기 이더넷 패킷을 분류하는 패킷분류부; 상기 분류된 이더넷 패킷을 저장하고 저장된 이더넷 패킷의 수를 계산한 후 제2제어신호에 기초하여 출력하는 패킷처리부; 상기 패킷처리부에서 출력되는 이더넷 패킷을 입력받아 동기식 디지털 계위 프레임으로 변환하고 상기 변환된 프레임의 갯수를 계산한 후 가상 상자(virtual container)그룹에 매핑하여 출력하는 패킷/동기식 디지털 계위 변환부; 및 상기 패킷처리부에 저장된 이더넷 패킷의 수와 프레임의 갯수에 기초하여 상기 이더넷 패킷의 성능을 측정하고 상기 제1내지 제2제어신호를 출력하는 신호처리부;를 포함하는 것을 특징으로 하며, 동일한 목적지를 가지는 패킷을 동일한 그룹으로 관리함으로써 시스템의 운용관리를 단순화 할 수 있고, 또한 경로설정시 대역폭을 보다 효과적으로 사용할 수 있어 다양한 서비스 수용이 가능하다
Abstract:
본 발명에 의한 SONET/SDH, PDH, 그리고 이더넷 신호의 통합 스위칭/전달 장치 및 그 방법은 동기식 디지털(SONET/SDH)신호, 유사 동기식 디지털(PDH)신호, 그리고 이더넷 신호의 접속, 동기식 디지털(SONET/SDH)신호, 유사 동기식 디지털(PDH)신호, 그리고 이더넷 신호의 상호 변환, 패킷 스위칭, 동기식 타임슬롯 스위칭, 그리고 채널구성관리 및 제어 기능을 하나의 시스템에서 통합하여 제공하여, 어플리케이션에 맞추어 패킷 스위칭 용량, 타임슬롯 스위칭 용량, 패킷/타임슬롯 브릿징 용량을 증설 및 구성할 수 있고, 패킷/타임슬롯 브리지를 통해 개별 이더넷 장치 또는 SONET/SDH 네트워크 장치가 제공하는 서비스와는 차별적인 서비스를 제공할 수 있으며, 서비스 이용자에게는 다양하고 신뢰성 있는 통신서비스를 저렴한 가격으로 제공하고 통신 사업자에게는 투자 및 유지보수 비용의 감소 효과를 제공할 수 있다
Abstract:
PURPOSE: An apparatus and a method are provided to prevent the frequency of clock from being restricted by the time delay even when the phase of input data changes for packets. CONSTITUTION: An apparatus(300) comprises an edge detection unit(400) for detecting edges from input data and a first delay signal obtained by delaying the input data for a predetermined time; and a clock signal reproducing unit(410) for correcting the non-edge portion on the basis of the detected edge and the feedback signal obtained by delaying the detected edge for a predetermined time, and outputting the reproduced clock signal. The edge detection unit includes a first delay(402) for delaying the input data for a half cycle of the input data; and an XOR gate(404) for performing an XOR operation on the input data and output signal of the first delay. The clock signal reproducing unit includes a second delay(416) for delaying the input signal for the integer times of the cycle of the input data; and an OR gate(412) for performing an OR operation on the signal output from the edge detection unit and the signal output from the second delay, and outputting the reproduced clock signal.
Abstract:
PURPOSE: A circuit for time-demultiplexing high-speed packet data with reference to packet synchronization is provided to prevent the loss of data according to feedback by time-demultiplexing the high-speed packet data irrespective of synchronization to convert the high-speed packet data into low-speed parallel data, detecting packet synchronization from the low-speed parallel data, and rearranging the sequence of the parallel data to be suitable for synchronization. CONSTITUTION: A time demultiplexer(21) converts high-speed digital data into low-speed parallel digital data. A packet synchronization detecting unit(22) detects the synchronization of a packet from the low-speed parallel digital data demultiplexed in the time demultiplexer(21). A synchronization unit(23) rearranges the sequence of the parallel digital data on the basis of the synchronous signal detected in the packet synchronization detecting unit(22).