Abstract:
A method and an apparatus for transmitting ACK/NACK information in orthogonal frequency division multiplexing access systems based on time-division duplexing are provided to minimize the electrical transmission restriction as to the information transfer except the ACK/NACK information. The scheduling information is generated and the TDD(Time Division Duplexing) ratio value is decided. In case the remaining value is not zero by dividing the FL (Forward Link) time slots into the number of RL (Reverse Link) time slot, the number of TDD ratio value produces the group index information by grouping the mobile terminals into a plurality of groups. The TDD ratio value and group index information are transmitted to the mobile terminal. The TDD ratio value comprises the ratio of the number of the time slot allocated to each link according to the amount of data transmitted to FL and RL for the fixed time interval.
Abstract:
A method and an apparatus for generating a security key in a mobile communication system prevent denial of a service by a message attack in not only an RF level but also a protocol level. A master session key and an expansion master session key are generated from a long term credential(391). The device authentication, the user authentication, the generation/management of a session related key are performed from the master session key(MSK)(393). A mobile IP route key(MIP-RK) and a proxy mobile IP route key are generated from the expansion authentication key and a client mobile IP key and the proxy mobile IP key are generated from the mobile IP route key(MIP-RK) and the proxy mobile IP route key(397,398).
Abstract:
A method for managing the mobility of a mobile station in a mobile communication system using the mobile IPv6, and a system therefor are provided to process data communication safely and efficiently by performing the authentication related to IP call processing in a mobile IP process. Each of BSs(base stations)(107, 108, 109 ) establish a wireless connection with a mobile station(110) located within each cell, service coverage, and then communicate with the mobile station. An SRNC(Signaling Radio Network controller)(105, 106) control the communication of the mobile station through the BS in case the mobile terminal is in the idle mode. The mobile station is a mobile node which connects to a packet data network like the Internet through access gateways(103, 104).
Abstract:
A method and an apparatus for managing active set in s mobile communication system are provided to allocate radio resource to the mobile terminal effectively by using a pilot report, which determines whether to allocate radio resource, of the mobile terminal. The reception strength of a pilot channel, which determines whether to allocate radio resource, of a mobile terminal is measured(201). It is determined that the number of active sets, maniging the mobile terminal, is greater than or equal to the predetermined number of active sets(204). It is determined whether to transmit the pilot to the base station according to the result of the inspection. The trnasmission of the pilot is performed through a pilot report.
Abstract:
A handoff method between different networks and a system thereof are provided to reduce a handoff time while preventing service interruption during the handoff process. A dual AT(Access Terminal) receives a neighbor list including a pilot PN(Pseudo-Noise) from a BS(Base Station)-WiMax(Worldwide interoperability for Microwave Access)(203) and transmits a handoff request message including the pilot PN to the BS-WiMax(205). When the handoff request message is transmitted from the BS-WiMax to an ASN(Access Service Network)-WiMax(207), a session negotiation process is performed between the terminal and the ASN-WiMax(209). The ASN-WiMax obtains a PDSN(Packet Data Service Node)-A address from the pilot PN(211) and transmits a handoff request to the PDSN-A by using the PDSN address(213). When the BS-WiMAX transmits a response with respect to the handoff to the dual AT(245), the dual AT transmits an indication via a handoff indication message to the BS-WiMax(247).
Abstract:
An apparatus and a method for providing CSI(Channel State Information) feedback in a wireless communication system are provided to efficiently reduce the total amount of CSI fed back between a BS(Base Station) and SSs(Subscriber Stations) by making CSI for a subset of multiple channels fed back to the BS from the SSs. An SS measures CSI for a plurality of channels respectively. The SS applies an offset vector to the measured CSI in order to generate a modified CSI. Based on the modified CSI(430), the SS determines a subset of the channels(435). Then the SS reports either the original CSI for the determined subset or the modified CSI to a BS(440). In this case, each CSI contains a CQI(Channel Quality Indicator). The offset vector contains a plurality of offset values. The SS applies each offset value to the CQI of each associated channel so that a modified CQI can be generated.
Abstract:
A data transmission rate control device in a communication system using a multi-hop scheme and a method thereof are provided to control a data transmission rate efficiently between a BS(Base Station) and an RS(Relay Station) by using channel information between the BS and the RS and between the RS and an MS(Mobile Station), thereby solving a problem that data are continuously accumulated in the RS. A channel information receiver(560) receives channel information of an RS and channel information of an MS from the RS. A data transmission rate calculator(520) calculates a data transmission rate to be transmitted to the RS by using the channel information of the MS and the channel information of the RS. An adaptive coding unit(540) generates data to be transmitted to the RS according to the calculated data transmission rate. A transmitter(550) transmits the generated data to the RS.
Abstract:
본 발명은 무선 이동통신 시스템에서 공통의 무선자원을 이용해 방송 서비스를 제공하는 방법에 관한 것이다. 본 발명에서 제공하는 복수의 셀들로 구성되는 이동통신 시스템에서 단말이 상기 복수의 셀들 간을 이동하면서 방송 서비스를 수신하는 방법은, 상기 복수의 셀들 중 하나인 소스 셀에서 방송 프로그램을 수신하고 있는 단말이 타겟 셀로 이동할 경우 상기 타겟 셀이 속한 방송영역을 나타내는 방송영역 식별정보를 수신하는 과정과, 상기 방송영역 식별정보에 따라 이전 방송영역을 이탈하였는지를 검출하는 과정을 포함함을 특징으로 하는 방송 서비스를 수신하는 방법을 포함한다. 방송 서비스, 방송영역 식별자, DL-MAP
Abstract:
A method for providing a system configuration change time in a mobile communication system and an apparatus thereof are provided to reduce the power consumption of a terminal by making the terminal in a sleep state check the time when system configuration information is changed and update the system configuration information. A method for providing a system configuration change time in a mobile communication system comprises following several steps. A BS(Base Station) checks whether a current slot transmits a quick page slot(300). The BS, which determines to transmit the quick page slot, calculates the time having passed after system configuration information is finally changed(302). The BS selects a CCI(Configuration Change Indicator) value matched with the calculated time, and configures a quick page channel including the CCI(304). The BS transmits the configured quick page channel and terminates operation of the current slot(306).
Abstract:
고속 멀티미디어 데이터 전송을 위한 이동 통신시스템(1X EV-DV)에서 효율적인 서비스 품질 관리를 위한 장치 및 방법이 개시되어 있다. 본 발명은 서비스품질에 근간을 둔 데이터전송을 위하여 전송할 패킷의 등급을 나누고 패킷별로 다른 QM(Quality Matching)을 수행하기 위하여 적절한 가중치를 할당하는 장치 및 방법에 관하여 논하고 있다. 상기한 바에 따른 본 발명의 장치는 이동통신 시스템에서 멀티미디어 데이터를 전송하기 위한 장치로서, 각 서비스에 따라 전송할 데이터들을 응용서비스 스트림의 클래스에 따라 논리채널을 형성하는 라디오 링크 프로토콜 계층과, 상기 라디오 프로토콜 계층에서 출력된 데이터를 서비스의 품질에 따라 전송 단위로 다중화하여 출력하는 다중화 계층과, 단말로부터 전달된 데이터 요구 전송율(DRQ) 값을 수신하여 출력하는 데이터 요구 전송율 제어기와, 상기 전송되는 데이터의 송신 및 수신 요구 신호를 생성하여 출력하는 송수신 요구 제어기와, 상기 전송 단위 데이터들의 품질에 따른 사상 값과 리던던시 값을 결정하여 출력하는 제어기와, 각 전송 단위 데이터들에 체크를 위한 코드를 부가하고, 인코딩, 리던던시 선택과 서비스 품질에 따른 사상하여 출력하는 품질채널(MQC)들과, 상기 품질채널들의 출력을 직렬 조합하여 전송할 데이터로 변환하는 직렬 조합부로 구성되어 데이터를 송신함을 특징으로 한다.