Abstract:
PURPOSE: A complex access point device and a method for processing voice/data by using a complex access point device are provided to realize a voice service of the good quality by realizing a complex access point transmitting and receiving packets after dividing the packets into voice packets and data packets. CONSTITUTION: A wireless unit(120) wirelessly transmits and receives packets to and from random wireless data communication terminals. A voice data processor(150) decodes the inputted voice packets into PCM(Pulse Code Modulation) for outputting the same, and encodes the inputted PCM voice data into voice packets. A voice interface unit(160) outputs the PCM voice data inputted from the voice data processor(150) to a private branch exchange(60) or a key phone, and outputs the voice PCM data inputted from the private branch exchange(60) or the key phone to the voice data processor(150). A control unit(110) examines a target IP(Internet Protocol) address of the packets inputted from the wireless unit(120). In the case that the target IP address is an IP address of a complex access device, the control unit(110) transmits the packets to the voice data processor. In the case that the target IP address is not the IP address of the complex access device, the control unit(110) transmits the packets to a data interface unit. The data interface unit outputs the data packets inputted from the control unit(110) to a data network, and outputs the data packets inputted from the data network to the control unit(110).
Abstract:
본 발명은 DECT(Digital Enhanced Cordless Telecommunication) 방식을 채용한 무선 통신 교환기에서 기지국 동기화 신호를 공급하는 방법에 관한 것으로 보다 상세하게는 무선 통화시 핸드오버(Hand over) 기능을 보장하기 위하여 요구되는 각 기지국의 동기화를 위해 무선 통신 교환기에 구비된 기지국 컨트롤러에 기지국 동기화 신호를 공급하는 방법에 관한 것이다. 본 발명을 실시하면 다음과 같은 이점이 있다. 기지국 컨트롤러의 추가/해체시 주제어부에 개개의 기지국 컨트롤러에 일대일 대응되는 클럭 공급부가 설치되어 있기 때문에 기지국 컨트롤러의 추가/해제가 있을 경우 추가 대상에 대한 클럭 공급용 부가 장비의 추가적인 설치/복잡한 해체 과정이 필요없어도 클럭 공급부와 클럭 중계부간에 클럭 전송선만 추가/해제함으로써 컨트롤러의 추가/해제를 용이하게 할 수 있으며 일대일 대응 방식으로 인한 설치 구성의 간결화를 기할 수 있다. 또한 일대일 대응 방식의 구성으로 인해 종전 기지국 컨트롤러의 추가로 인한 공급원 컨트롤러에 발생할 수 있는 과부하 문제 등의 염려가 없어 통화 용량의 증설을 꾀하기가 매우 용이하다. 다시 말해 종전의 공급원 컨트롤러의 한 개의 클럭 신호 전송 노드(node)에서 나머지 다수의 기지국 컨트롤러로 전송을 함으로써 야기될 수 있는 과부하 문제를 교환기 주제어부에 신호 전송 노드를 각 기지국 컨트롤러에 일대일 대응시켜 과부하 문제를 방지할 수 있다.
Abstract:
Disclosed is a composite access point apparatus which can process voice packets and data packets at the same time in a wireless data communication system using a wireless local area network, and a method for processing voice packets and data packets using the same. The composite access point apparatus confirms a kind of inputted packets, transmits the data packets to a data network, and decodes the voice packets and transmits them to a connected private branch exchange or key telephone system.
Abstract:
PURPOSE: An apparatus and a method for compensating a timing difference between inter-different digital links between a private exchange and a base station in a wireless private exchange system are provided to easily increase a channel of a base station by compensating the timing difference generated in case of interlocking two digital links or more in a wired interval between the wireless private exchange and the base station. CONSTITUTION: A voice channel stream unifying unit has a shift register(100) for converting a voice channel stream of a link, which is supposed to be changed according to a reference frame among inter-different digital links from serial data, to parallel data according to the first control signal. The voice channel stream unifying unit has a shift register(200) for converting the voice channel stream from the parallel data to the serial data according to the second control signal and outputting the voice channel stream to be changed according to the reference frame. A voice channel stream redistributing unit has a shift register(300) for converting the voice channel stream from the serial data to the parallel data according to the third control signal. The voice channel stream redistributing unit has a shift register(400) for converting the voice channel stream from the parallel data to the serial data according to the fourth control signal and outputting the voice channel stream to be changed according to each frame of the inter-different digital links.
Abstract:
PURPOSE: A method which can synchronize base stations in a wireless private automatic branch exchange system and provide an improved wireless communication service and an apparatus which can perform the method are provided. CONSTITUTION: An apparatus for synchronizing a plurality of base stations in a wireless private automatic branch exchange system, the wireless private automatic branch exchange system including wireless private automatic branch exchange having a base station interface with which the plurality of base stations are respectively connected, and a plurality of mobile stations, includes; a clock providing part (21) for generating a reference clock; a plurality of line interfaces (111 through 113) corresponding to each of the plurality of base stations; a plurality of wires connecting the plurality of line interfaces with the plurality of base stations, respectively; a control part (115) for generating a test signal in response to the reference clock to provide the test signal through the plurality of line interfaces and the plurality of wires to the plurality of base stations, and for generating a delay control signal corresponding to a loop delay time period; a loop delay measuring part (114) for measuring loop delay time periods of the plurality of base stations based on the test signal; and a delay circuit (116) for controlling delay time periods of the plurality of line interfaces in response to the delay control signal and for providing a synchronizing information generated by the control part to each of the plurality of base stations.
Abstract:
가. 청구범위에 기재된 발명이 속하는 기술분야 무선 교환시스템 나. 발명이 해결하려고 하는 기술적 과제 무선 기지국간의 시간 분할 다중 방식을 위한 클럭을 동기시킨다. 다. 발명의 해결 방법의 요지 무선 교환시스템에서 슈퍼 프레임 펄스(super frame pulse)를 생성하여 상기 무선 기지국으로 유선 인터페이스 선로를 통해 전송하는 교환기와, 상기 유선 인터페이스 선로를 통해 전송되는 상기 슈퍼 프레임 펄스를 시간 분할 다중(Time Division Duplex) 방식을 위한 기준 클럭으로 사용하는 무선 기지국으로 구성된다. 라. 발명의 중요한 용도 교환기에서 각 무선 기지국으로 super frame pulse를 공급하여 무선 기지국간의 동기를 맞출 수 있다.
Abstract:
본 발명은 무선 사설 교환 시스템에서 기지국의 비동기 상태를 검출하여 기지국을 동기화 시키는 기지국 동기화 장치를 제공한다. 이를 위한 본 발명의 기지국 동기화 장치는 사설 교환기 내에 구비된 클럭 공급부와 기지국 내에 구비된 버스트 모드 컨트롤러, 비동기 검출 회로부를 포함하여 구성된다. 클럭 공급부는 프레임 동기 클럭과 비동기 검출 클럭을 발생한다. 버스트 모드 컨트롤러는 상기 프레임 동기 클럭을 카운트하여 데이터 송신 클럭을 생성한다. 비동기 검출 회로부는 상기 데이터 송신 클럭의 카운트 시점이 비동기 검출 클럭의 발생 시점으로부터 프레임 동기 클럭의 1 주기 이내에 위치하지 않으면, 데이터 송신 클럭을 리셋시키기 위한 비동기 검출 신호를 발생한다. 이에 대응하여 버스트 모드 컨트롤러는 데이터 송신 클럭을 리셋시킨다. 이에 따라 기지국의 비동기 상태를 검출하여 기지국의 동기를 맞춤으로써 원활한 핸드 오버 서비스 지원을 할 수 있게 된다.
Abstract:
PURPOSE: An apparatus for synchronizing base stations of a wireless private automatic branch exchange is provided to support a smooth hand-over service by synchronizing the base stations by detecting non-synchronization status of the base stations. CONSTITUTION: A private automatic branch exchange includes a clock supply part generating a frame synchronization clock(201) and a non-synchronization detecting clock(202). The frame synchronization clock(201) becomes a reference of transmission frames with base stations. The non-synchronization detecting clock(202) detect non-synchronization status of the base stations. A burst mode controller counts the frame synchronization clock for generating a data transmission clock(203). The base station includes a non-synchronization detecting circuit part(80) generates a non-synchronization detecting signal(206) for resetting the data transmission clock(203) if the count point of the data transmission clock(203) is not located within one period of the frame synchronization clock(201) from the generation point of the non-synchronization detecting clock(202).
Abstract:
PURPOSE: A method for supplying a base station synchronous signal from a mobile switching center(MSC) to a base station controller is provided, which increases an efficiency of a frame clock supply. CONSTITUTION: A main control part(100) controls an operation of a mobile switching center(MSC) and controls all procedures of a wireless communication like a transmission and a connection of all signals for communication. A clock generation part(101) generates a data frame clock(base station synchronous signal). A base station controller(110) controls an operation performed in a conventional base station(120), and the number of base stations that one base station controller can control is determined while designing a wireless communication network. A clock supply part(102) supplies the clock from the clock generation part to the base station controller. A clock relay part(111) relays the clock from the clock supply part to the base station controller.
Abstract:
PURPOSE: An apparatus for performing synchronization of a wireless switching system is provided to make a line card measure loop delays generated in wire sections with base stations and to delay frame pulses supplied to each base station by the measured loop delays with different delay values, so that the frame pulses can simultaneously reach all the base stations. CONSTITUTION: Line interfaces(320-1-320-n) are connected to each base station with wire sections. A loop delay measurer(350) measures loop delays from a delivery point of frame pulses outputted through each interface(320-1-320-n) until a signal responding to the frame pulses is received. The loop delay measurer outputs the measured loop delays as delay data values. A delay controller(340) decides a biggest value of the delay data values as a reference value, and outputs an error with the delay data values as an optional error value. A delayer(330) delays the frame pulses for being supplied to the line interfaces(320-1-320-n) by the optional error value, and outputs the delayed frame pulses. A signal processor(310) applies a signal processing to information by the frame pulses, and outputs the signal-processes information to the base stations through the line interfaces(320-1-320-n).