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 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 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 멀티캐스트 멀티미디어 방송 서비스(MBMS 서비스)에 관한 것이다. 본 발명은 서빙 무선망 제어기(SRNC)가, 단말이 가입한 MBMS 서비스에 대한 현재 세션을 상기 단말이 수신하고자 하는지를 확인하고, 상기 SRNC가 상기 확인 결과에 따른 상기 단말의 상기 MBMS 서비스에 대한 세션 무관심 정보를 드리프트 무선망 제어기(DRNC)에게 전송하며, 상기 DRNC가, 상기 단말을 상기 MBMS 서비스에 대한 MBMS 컨텍스트에 포함시키고, 상기 단말의 상기 세션 무관심 정보에 따라 상기 단말을 상기 MBMS 서비스를 위한 카운팅에서 배제할지를 판단한다. 이와 같이 하면 무선자원을 보다 효율적으로 사용할 수 있다. MBMS(Multimedia Multicast/Broadcast Service), Repeated Session (Frequency Layer Convergence), Counting, UE interest
Abstract:
A method and an apparatus for transceiving packets in a mobile communication system are provided to reduce a size of the packets transceived through a radio channel without signaling a size of an upper layer packet if a size of the upper layer packet is calculated from an entire size. A method for transceiving packets in a mobile communication system comprises the following steps of: receiving a first packet from an upper layer; configuring a second packet in the first packet by inserting a size index(SID), having one of a code point mapped to one of predetermined packet sizes or a code point indicating that a size of the first packet can be derived from a size of the second packet, into a header(525); and transmitting the generated second packet to a lower layer(545).
Abstract:
본 발명은 이동통신 시스템에서 HARQ 동작을 이용하여 상위 계층에서 ARQ 동작을 보다 효율적으로 수행하는 방법 및 장치에 관한 것으로서, 이는 패킷의 재전송을 위해 HAQR 동작과 ARQ 동작을 지원하는 이동 통신 시스템의 송신기에서 수행되는 재전송 방법에 있어서, HARQ 엔터티가 적어도 하나의 ARQ 패킷이 포함된 HARQ 패킷을 수신기로 전송하는 과정과, 상기 HARQ 패킷이 전송 실패된 경우 상기 HARQ 엔터티가 해당 ARQ 엔터티로 상기 ARQ 패킷의 전송 실패를 알리는 국부(Local) NACK 신호를 전송하는 과정을 포함함을 특징으로 한다. 본 발명에 의하면, HAQR와 ARQ 동작을 모두 지원하는 이동통신 시스템에서 ARQ 동작의 오류 여부를 용이하게 판별할 수 있으며, HARQ 엔터티가 ARQ 엔터티로 Local ACK/NACK을 전송하는 방식으로 ARQ 패킷의 재전송 여부를 신속하게 결정하여 ARQ 동작의 성능을 대폭 향상시킬 수 있다.
Abstract:
A method and an apparatus for performing an ARQ in a mobile telecommunication system are provided to reduce retransmission delay by retransmitting a lost packet, which is not recognized by an ARQ receiver side. A framing device(715) frames a packet from an upper layer to form an ARQ(Automatic Repeat Request) packet. A retransmission buffer(720) stores a copy of the ARQ packet for retransmission. A multiplexer(725) multiplexes the ARQ packets to form the ARQ packet. An HARQ processor(730) controls an HARQ process of the HARQ(Hybrid Automatic Repeat Request) packet. A transceiver(735) modulates the HARQ packet into a wireless signal, transmits the wireless signal, receives the HARQ packet having the status report, and demodulates the received HARQ packet. A controller(705) detects the ARQ packet having a transmission complete time earlier than the status report generation time from the ARQ packet stored in the retransmission buffer, and controls the retransmission buffer, such that the ARQ packets, which are not positively or negatively acknowledged according to the status report, are transmitted.
Abstract:
A method and an apparatus for an HARQ(Hybrid Automatic Repeat Request) reordering using a retransmission limit in a mobile communication system are provided to reliably reorder the HARQ by referring to a reception timing of an initial HARQ packet and a maximum retransmission number of a reordering flow. A transceiver(805) receives and demodulates an HARQ packet from a wireless channel. An HARQ processor(810) records an initial reception timing and a retransmission number of the demodulated HARQ packet and outputs a successful HARQ packet. A demultiplexer(815) outputs multiplexing information of the HARQ packet. Reordering buffers(820,825,830) stores the packets until the HARQ packets from the demultiplexer are reordered and delivers the reordered packets to an upper layer. When a gap occurs on a packet order, a candidate group for the gap is configured under a previously desired condition. When the candidate group is a null set, non-received packets are discarded and the reordering process is performed. When the gap is filled, a reordering buffer controller performs the reordering process such that the packets are delivered to the upper layer.
Abstract:
A method and an apparatus for transmitting SI(Scheduling Information) in a mobile communication system are provided to allow a base station to obtain information required for scheduling by transferring SI of a terminal to a cell belonging to a serving RLS(Radio Link Set) when several RLSs are formed at the terminal in a soft handover area. When SI is generated, the SI is configured as a MAC(Media Access Control)-e PDU(Protocol Data Unit) and transmitted to cells of a serving RLS(410) and cells of a non-serving RLS(415). When NACK with respect to the MAC-e PDU arrives from the cells of the serving RLS, the MAC-e PDU is re-transmitted. When the number of re-transmissions of the SI data reaches a maximum re-transmission limit, it is determined that the transmission of the SI has failed, and the SI is inserted into a new MAC-e PDU and then transmitted.
Abstract:
본 발명은 작은 오버헤드만으로 패킷 데이터 전송을 위한 MAC 제어 메시지의 무결성을 보호하기 위해 CRC 코드를 추가하여 암호화함으로써 제어 메시지를 처리하는 장치 및 방법을 제공함에 있다. 본 발명은 복수의 사용자 단말(User Equipment)과 기지국(Node B)을 포함하고, 상기 UE들로 부터 상기 Node B로의 패킷 데이터 전송을 위해 사용될 Media Access Control(MAC) 제어 메시지를 상기 UE들 중 하나의 UE가 상기 Node B로 공통채널을 통해 전송하는 통신 시스템에서, 상기 하나의 UE에서 상기 MAC 제어 메시지를 생성하는 과정과 상기 MAC 제어 메시지에 미리 정해진 CRC 코드를 부가하는 과정과, 상기 MAC 제어 메시지와 상기 CRC 코드를 암호화하는 과정과, 상기 암호화 메시지를 상기 Node B로 전송하는 과정을 포함함을 특징으로 한다. 암호화(Ciphering), CRC(Cyclic Redundancy Checking), 버퍼 상태 보고(Buffer Status Report) 메시지, 제어 메시지(Contrl Message), 무결성 보호(Integrity Protection)