Abstract:
본 발명은 이동 통신 시스템에서의 가변 길이 프레임 구성 장치 및 그 방법에 관한 것이다. 본 발명은 송신부에 포함되어, 수신부로 적어도 한 개 이상의 데이터 프레임을 순차적으로 전송한 후에, 수신부로부터 미전송된 데이터 프레임별 재전송 요청이 접수되면, 접수된 데이터 프레임과 동일한 시퀀스(sequence) 번호를 갖는 데이터 프레임을 재구성한다. 이때, 재구성하는 데이터 프레임은 처음 전송한 데이터 프레임과 그 개수가 동일하거나 적어도 두 개 이상인데, 이는 프레임별 전체적인 크기가 미전송된 데이터의 크기와 동일하다. 그리고, 본 발명은 재구성하는 데이터 프레임별 헤더(header) 내에, 초기 전송인지 재전송인지를 알 수 있는 P/R(Primary transmission/Retransmission)과 시작점인 SP(Start Pointer) 및, 끝점인 EP(End Pointer)를 포함시켜 구성한다. 이는 수신부에서의 프레임 복원시, 원래의 정확한 데이터 프레임을 복원할 수 있도록 하기 위함이다. 이를 통하여, 효과적인 자동 재송 요구(ARQ) 지원 및 그에 따른 높은 데이터 전송 품질을 제공할 수 있다.
Abstract:
A base station device for transmitting the random access preamble response information of wireless communication system, a terminal device for receiving and a method for transceiving the same are provided to reduce the decoding time by decoding the data required to transmit the random access preamble response information of the wireless communication system. A base station device for transmitting the random access preamble response information of wireless communication system includes a preamble reception process unit(210), a bit map formation unit(240), a connection response formation unit(250), a preamble response transmission process unit(220) and a message reception process unit(230). The preamble reception process unit(210) finds the information of the preamble by receiving the preamble transmitted from the terminal. The bit map formation unit(240) forms the bit map displaying the response of the preamble received from a plurality of the terminals. The connection response formation unit(250) constructs the data block to transmit the preamble response element to the preamble response channel. The preamble response transmission process unit(220) transmits the bit map formed by the bit map formation unit(240) and the preamble response element formed by the connection response formation unit to the terminal. The message reception process unit(230) receives and processes the message transmitted by the terminal after the preamble response element is transmitted.
Abstract:
PURPOSE: A packet scheduling method in accordance with power is provided to determine a priority in consideration of power-related parameters, and to assign a remaining power to a terminal which can transmit more data groups with little power, thereby increasing a system throughput with the limited power. CONSTITUTION: A system manager of a base station decides whether to consider power parameters for packet scheduling(S301). If so, the system manager sets a beta value according to a reflecting degree of the power parameters(S302), and calculates an amount of necessary power and average power(S303), then determines a priority(S304). The base station assigns a power to each terminal according to the priority(S305), and carries out a scheduling process for data transceiving.
Abstract:
PURPOSE: A channel estimation method based on a pilot symbol by using a Lagrange interpolation method and a receiving device for estimating a channel according to the method are provided to properly track a state of a suddenly changing channel by using an interpolation method using a Lagrange interpolating polynomial, thereby estimating a more remarkably changing channel state. CONSTITUTION: Each time slot is divided into two semi-slots, while pilot symbols included in each of the two semi-slots are restored. A channel estimation average value for the semi-slots is obtained by using the restored pilot symbols. A data symbol is estimated by applying a Lagrange polynomial interpolation for interpolating each channel estimation average value corresponding to a specific number of continuous semi-slots with the use of a polynomial curve line.
Abstract:
PURPOSE: A performance analyzing method and bandwidth determining method of a broadband transmission path adopting a statistical multiplier are provided to theoretically evaluate loss probability and transmission delay of a packet according to a given traffic situation, effectively operate a broadband transmission path and maintain a suitable transmission quality by evaluating a bandwidth of the transmission path according to a bandwidth determining method proposed in case that a loss probability and transmission delay of a required packet have not been previously determined. CONSTITUTION: A bandwidth satisfying a delay condition is determined(S31). A size of a transmission buffer of a broadband transmission path satisfying a maximum allowable delay time is determined(S31). A packet loss probability of a bandwidth is calculated in consideration of the maximum delay time(S33). A packet loss probability(Pd) and a packet loss probability(PL) requested for transmission are compared(S34). If Pd is greater than PL, a size of a buffer is increased one by one(S36) to calculate a packet loss probability of the bandwidth(S37), the obtained packet loss probability(Pd) and the packet loss probability(PL) requested for transmission are compared(S38), thereby finding a buffer size satisfying a QoS(quality of service) condition. A bandwidth satisfying the QoS is determined(S39).
Abstract:
Disclosed are a method and an apparatus for managing a resource of a cloud virtual base station system. The method comprises: setting an initial resource and performing reconfiguration for adding or removing a resource of an execution file of a cloud virtual base station system; monitoring or managing an error of the cloud virtual base station system, a wireless resource, a status of the execution file, or a configuration status of the added or removed resource; managing configuration information of a list of software added or removed during configuration or operation for activating or inactivating, blocking or releasing the blocking, and adding or removing a hardware configuration for the cloud virtual base station system, and changing parameters of the hardware configuration; controlling the cloud virtual base station system in a predetermined specific mode; managing hardware information, file information, or control information of each module of the cloud virtual base station system; and managing the execution file for each module of the cloud virtual station system by adding or removing the predetermined specific mode initially or during an operation.