Abstract:
A handover method in a mobile communication system and an apparatus thereof are provided to prevent the forwarding of RLC(Radio Link Control) PDUs(Packet Data Units) which are successfully transmitted but have not received a positive recognition signal. A terminal recognizes that the handover is near at hand(605), distinguishes an RLC layer device which is matched with an RLC state report message generation condition(610), generates RLC state report information for each RLC layer device(615), includes the generated RLC state report information in a measurement result report message(620), and then transmits an RRC message(625).
Abstract:
Disclosed is a method and apparatus for transmitting/receiving a packet in a mobile communication system. When upper layer packets are multiplexed into a packet whose overall size is informed via a separate path, the size of the upper layer packet is not signaled if it can be calculated from the overall size of the packet, so that the size a packet transmitted/received over a radio channel can be reduced.
Abstract:
A method for managing packet sequence numbers according to the handover of a mobile terminal between base stations and an apparatus thereof are provided to dualize a PDCP sequence number used for discriminating packets and a PDCP sequence number transmitted/received through an actual radio channel. If forward packets are received from an upper node, a base station 1(110) gives reference PDCP SNs to each packet starting from the initial reference PDCP SN(120). After applying a predetermined processing step such as scrambling process to the packets, the base station 1 inserts a pseudo PDCP SN into the header of a PDCP packet(125). A terminal(105) receives a PDCP PDU(130) in which the pseudo PDCP SN is accepted, extracts the reference PDCP SN from the pseudo PDCP SN, and then inverse-scrambles the PDCP PDU by using the reference PDCP SN(135). The base station 1 determines to hand the terminal over to the base station 2(115) at an arbitrary time(140).
Abstract:
A handover method and apparatus of a mobile communication system are provided to reduce a handover interruption time taken to perform handover. A BS(Base Station) of a source cell(403) determines whether an allocation cycle of reconfiguration SR(Scheduling Request)/CQI/sounding transmission resources for a UE(User Equipment)(401) is larger than a pre-set certain threshold value. If the allocation cycle is larger than the certain threshold value, the BS of the source cell configures two-step SR/CQI transmission resource information, includes the two-step SR/CQI/sounding transmission resource information in a handover command message, and transmits the same. When a BS of a target cell(405) receives corresponding control information from the UE via the first-step SR/CQI/sounding transmission resources, it allocates radio resources for a transmission of a handover complete message to the UE.
Abstract:
A reverse data processing method of a terminal which performs a discontinuous receiving action in a mobile communication system and a device thereof are provided to enable the connected terminal to variably set an active state in accordance with generation of reverse data, thereby efficiently controlling power consumption. As reverse data is generated, a discontinuous receiving action is interrupted, and the reverse data is transmitted(305,310). Depending on whether final data of the transmitted reverse data induces reception of forward data, discontinuous reception is resumed at a predetermined point of time(315-350). The data which induces the reception of the forward data refers to RLC(Radio Link Control) AM(Acknowledged Mode) data.
Abstract:
A method and an apparatus for performing handover by a connected terminal in a DRX(Discontinuous Reception) mode in a mobile communication system are provided to allow a terminal to perform handover to a target cell without a time delay while guaranteeing minimum power consumption. A transmitting/receiving unit(620) receives a DRX parameter, a cell change parameter, and type information for stopping the DRX from a base station. A DRX controller(625) controls ON/OFF operations of the transmitting/receiving unit by using the received DRX parameter. An RRC(Radio Resource Control) entity(605) measures reception quality with respect to adjacent cells via the cell change parameter and applies a control signal to the DRX controller according to the measurement result, to control to turn on the transmitting/receiving unit to perform a cell change report with a serving base station and perform handover to a target base station. An HARQ processor(615) processes the packets of HARQ that the transmitting/receiving unit receives through an HARQ operation, and transfers an HARQ packet, which has no error, to a demultiplexing device(610).
Abstract:
A method and an apparatus for transceiving packet data are provided to support plural default sub bearers by using one RLC(Radio Link Control) device, thereby reducing loads of a system or a terminal. A distributor(305) receives packet data from an upper layer, and transmits the received packet data to a default bearer according to a pre-designated reference. One or more PDCP(Packet Data Convergence Protocol) devices(310,315,320) compress and cipher a header(327) of the packet data according to a designated scheme, and make a PDCP data unit by inserting an identifier(330) for PDCP discrimination into the packet data. A common RLC device(325) divides and connects the one or more PDCP PDUs, and configures the PDCP PDU as an RLC PDUs(355,360,365) by inserting a framing header and a serial number of an RLC.
Abstract:
A transceiving method of packet decoding information for a packet service in a mobile communication system is provided to transmit packets only without sending packet decoding information if the packet decoding information of the packets to be currently transmitted is the same as predetermined basic packet decoding information, thereby efficiently using limited transmission resources. A packet encoding controller(825) compares packet decoding information of packets to be transmitted with predetermined basic packet decoding information. If the compared information is the same, a transceiver(830) transmits the packets through a common channel by using predetermined transmission resources without sending the packet decoding information. If the compared information is different, the transceiver(830) transmits the packets and the packet decoding information through the common channel by using transmission resources allocated for the packets.
Abstract:
본 발명은 네트워크 공유 시스템에서 단말기가 시스템 정보의 유효성을 판단하여 시스템 정보를 수신하는 방법 및 장치에 대한 것으로서, 상기 방법은, 단말이 이전 셀로부터 새로운 셀로 이동하는 과정과, 상기 이전 셀이 속한 공중 육상 이동네트워크(PLMN)를 나타내는 PLMN 인식정보를, 상기 새로운 셀이 속한 PLMN을 나타내는 PLMN 인식정보와 비교하는 과정과, 상기 새로운 셀의 PLMN 인식정보가 상기 이전 셀의 PLMN 인식정보와 동일하면, 상기 이전 셀에서 수신하여 저장하고 있는 시스템 정보 블록들을 상기 새로운 셀의 시스템 정보로 설정하는 과정과, 상기 새로운 셀의 PLMN 인식정보가 상기 이전 셀의 PLMN 인식정보와 동일하지 않으면, 상기 이전 셀의 시스템 정보가 상기 새로운 셀에서 유효하지 않은 것으로 판단하고, 상기 새로운 셀로부터 "셀 및 PLMN 적용범위를 가지는 시스템 정보 블록들"을 수신하는 과정을 포함함을 특징으로 한다. Network Sharing, System Information Block, Selected PLMN, PLMN identity, Shared PLMN
Abstract:
본 발명은 부호 분할 다중 접속 기술을 사용하여 복수의 셀들에 위치하는 다수의 단말기들에 멀티미디어 방송/멀티캐스트 서비스(MBMS 서비스)를 제공하는 이동통신 시스템에 대한 것이다. 무선망 제어기(RNCS)는 MBMS 서비스를 받는 단말기의 이동성을 지원하기 위해, 관리되는 복수의 셀들 각각으로 해당 셀에서 유효한 적어도 하나의 MBMS 서비스에 대한 유효성 여부와 리소스 정보를 나타내는 MBMS 서비스 유효성 메시지를 전송한다. 단말기는 상기 MBMS 서비스 유효성 메시지를 수신함으로써 현재 셀 내에서 원하는 MBMS 서비스를 현재 또는 추후에 수신할 수 있는지를 판단하고, 상기 원하는 MBMS 서비스를 요청하거나 또는 다른 셀의 재선택 등의 동작을 수행한다. 이러한 본 발명은 MBMS 서비스를 이용하는 단말기들의 이동시 MBMS 서비스 수신의 연속성을 향상시킬 뿐 아니라, 무분별적인 MBMS 서비스 요구를 위한 RRC 연결 설정의 오버헤드를 감소시킬 수 있다. MBMS, MBMS Service Availability, Lack of Resource, Non Service Area (NSA), Service Area (SA), Out of Service Area (OSA), MCCH