Abstract:
PURPOSE: A communications device using physical layer headers containing the MAC(Media Access Control) address of a destination, and a communications method using the same are provided to prevent resource consumption for decoding the entire MAC data frame included in a third sub-frame which is included in a physical layer protocol data unit, in an overhearing process. CONSTITUTION: A physical layer protocol data unit(100) includes a first sub-frame(110), a second sub-frame(120), and a third sub-frame(130). The first sub-frame includes synchronization information(111) for the synchronization between a receiver receiving the physical layer protocol data unit and a transmitter transmitting the physical layer protocol data unit. The second sub-frame includes a physical layer header(121) containing a first identifier(122) identifying the receiver. The third sub-frame includes data(133) and a MAC protocol data unit(131) containing a second identifier(132) identifying the receiver. The first sub-frame and the second sub-frame are decoded in the physical layer, and the third sub-frame is decoded in the MAC layer. [Reference numerals] (100) Physical layer protocol data unit; (110) First sub-frame; (111) Synchronization information; (120) Second sub-frame; (121) PHY layer header; (122) First identifier; (130) Third sub-frame; (131) MAC protocol data unit; (132) Second identifier; (133) Data;
Abstract:
PURPOSE: A communication method of a vehicle type mobile terminal in a communication system is provided to enable a vehicle type mobile terminal to allocate a unique code from a macro base station and to transmit the unique code to a neighboring region. CONSTITUTION: A vehicle type mobile terminal requests allocation of a unique code about a mobile terminal to a macro BS(Base Station)(220). The vehicle type mobile terminal receives radio resource information of a mobile terminal from the macro base station(230). The vehicle type mobile terminal broadcasts the unique code to one or more mobile vehicle relays(240).
Abstract:
PURPOSE: A multi-point cooperation method which considers delay in wireless communication system is provided to remove the interference between a UL cooperative domain and a non-cooperative domain by scheduling uplink cooperative terminals having similar delay property in the uplink cooperation. CONSTITUTION: UL(UpLink) cooperative terminals(520,522) transmits UL cooperative data to a serving BS(Base Station)(510) and a cooperative BS(530). The serving BS receives delay property of the UL cooperative terminals, and schedules the UL cooperative terminals. The UL cooperative terminals adopt a frame structure. A non-cooperative terminals(542) adopt a frame structure. The non-cooperative terminals transmit frame structure-adopted UL cooperative data to the cooperative BS.
Abstract:
PURPOSE: A communication system for adaptively applying single point transceiving or multi point transceiving is provided to adaptively select one of cooperative multi transceiving or single point transceiving to a target terminal based on a channel state or mobility of the target terminal. CONSTITUTION: A determining unit(1330) determines at least one of margin time for single point transceiving or a margin time for cooperative multi point transceiving based on information related to a channel state of a target terminal. A processing unit(1340) performs at least one of the single point transceiving or the cooperative multi point transceiving. The processing unit performs the transceiving in consideration of margin time for the single point transceiving and margin time for the multi point transceiving.
Abstract:
PURPOSE: A radio communication method and an apparatus thereof for alleviating a hidden node problem in order to reduce the performance degradation are provided to transmit and receive data in a state that the interference by the hidden node is minimum. CONSTITUTION: A plurality of access points covers a plurality of sectors. A plurality of access points performs the wireless communication to terminals existing within a plurality of sectors and TDD(Time Division Duplex) mode. A time division determining unit decides the length of the up link transfer section and the length of the downward link transmission section. A synchronization unit synchronizes the operating time of a plurality of access points.
Abstract:
A multi module communication apparatus and a data transmitting and receiving method using the same are provided to exchange a signal for controlling power supply of plural wireless communication modules included in the multi module communication apparatus by using a low power communication channel, thereby minimizing the whole power consumption. A selection information receiver(430) receives communication module selection information for instructing to select one of plural wireless communication modules(412,413) through a wireless channel(211) provided by a low power communication module(411). A power controller(440) supplies power by selecting a wireless communication module designated by the communication module selection information received through the selection information receiver. A data transceiver(450) transmits or receives data through a wireless channel(212,213) provided by the selected wireless communication module.
Abstract:
무선랜 망을 이용한 효율적인 셀룰러 부하 분산을 위한 방법 및 장치가 개시된다. 단말 장치에서의 트래픽 부하 분산 방법은, 단말 장치에서, 셀룰러 망 및 무선랜 망을 포함하는 공존 망의 망 정보를 수집하는 단계; 상기 단말 장치에서, 상기 망 정보에 따라 상기 무선랜 망으로의 부하 분산 비율을 결정하는 단계; 및 상기 단말 장치에서, 상기 무선랜 망으로의 부하 분산 비율에 따라 상기 셀룰러 망 및 상기 무선랜 망 중 적어도 하나를 이용하여 트래픽을 송수신하는 단계를 포함한다.
Abstract:
은닉 노드 문제 및 노출 노드 문제를 해결한 다중 셀 와이파이 운용 및 와이파이 오프로딩 방법 및 시스템이 개시된다. 일실시예에 따른 다중 셀 와이파이 운용 및 오프로딩 방법은 복수의 셀들 각각에 대응하는 액세스 포인트 및 노드를 식별하는 단계; 및 상기 액세스 포인트의 전송 범위에 대응하는 커버리지의 가장자리에 위치한 노드가 자신이 속한 셀의 커버리지 전체로부터 전송된 반송파를 감지할 수 있도록 상기 전송 범위 및 상기 노드의 반송파 감지 범위를 계산하는 단계를 포함할 수 있다.
Abstract:
Disclosed are a method and a system for operating multi-cell WIFI and WIFI offloading for solving both a hidden node problem and an exposed node problem. A method and a system for operating multi-cell WIFI according to one embodiment include a step of identifying an access point and a node corresponding to each cell; and a step of calculating the carrier wave detection range of the node and a transfer range to detect the carrier wave transferred from the entire coverage of the cell of a node by the node located on the edge of a coverage corresponding to the transfer range of the access point.
Abstract:
PURPOSE: A smart lock method, apparatus, system, and recording medium are provided to execute a lock and release function using a mobile apparatus and a QR(Quick Response) code. CONSTITUTION: The mobile apparatus of a transmitter creates an OTP(one time password)(S111). The mobile apparatus of the transmitter locks a locker using the created OTP(S112). The mobile apparatus of the transmitter transmits the created OTP to the mobile apparatus of a receiver(S113). When a reception confirmation message is not transmitted to the mobile apparatus of the transmitter in fixed time, the mobile apparatus of the transmitter retransmits the OTP to the mobile apparatus of the receiver. The mobile apparatus of the receiver releases the locker using the OTP(S118). [Reference numerals] (AA) Start; (BB) End; (S111) OTP creation; (S112) Lock; (S113) OTP transmission; (S114) Moving; (S115) OTP reception; (S116) OTP reception confirmation message transmission; (S117) Product receiving; (S118) Locker releasing; (S119) Locker releasing message transmission