Abstract:
PURPOSE: A resource allocation apparatus and a method thereof in a wireless communication system for improving the transmission efficiency of data are provided to improve data throughput by efficiently using resources in a wireless LAN. CONSTITUTION: A confirming unit(110) receives channel information and base station information from a system. The confirming unit confirms the number of available channels in the system. The confirming unit confirms the number of base stations from the base station information and the bandwidth of the channels where the base stations request allocation. The confirming unit confirms the number of base stations from the base station information and the bandwidths. An allocating unit allocates one or more channels to one base station. A generating unit transmits allocation information corresponding to the channel allocation to the base stations.
Abstract:
본 발명은 기준 채널을 이용한 기준 파워비 조절 방법에 관한 것이다. 이를 위하여 본 발명의 실시예에 따른 기준 파워비 조절 방법은, 사전에 설정된 전송 시간 간격마다 전송되는 기준 채널의 시그널 파워 및 노이즈 파워를 이용하여 파워비를 산출하고, 산출된 파워비를 이용하여 PW 윈도우 구간 및 CW 윈도우 구간의 평균 파워비를 각각 산출한 뒤, 산출된 PW 윈도우 구간의 평균 파워비와 CW 윈도우 구간의 평균 파워비의 차이를 통해 수신 파워비의 변화량을 산출하고, 에러 검출 여부에 따라 산출된 수신 파워비의 변화량을 이용하여 기준 파워비를 조절하는 기준 파워비 조절 방법을 제공한다. 본 발명에 따르면, 매 전송 시간 간격마다 채널 상태에 따라 각각 상이한 파워 조절량을 이용하여 기준 파워비를 재조절함으로써, 기준 파워비 값을 채널이 변한만큼만 교정할 수 있어, 일시적으로 파워가 증가하는 현상 또는 일시적인 파워가 감소하는 현상을 완충시키는 효과가 있다. 기준 파워비, target SINR, PW 윈도우, CW 윈도우, 에러 검출
Abstract:
본 발명은 OFDMA FDD 기반 시스템에서의 순방향 채널 구성 방법 및 순방향 채널 할당 방법에 관한 것으로, 순방향 채널 구성 방법에서는 먼저 상기 복수의 셀 각각의 위치 관계에 기초하여 상기 복수의 셀을 특정 수의 패턴으로 분류하고, 상기 분류된 패턴이 서로 다른 셀의 각 기지국이 상기 순방향 채널의 주기 내에서 서로 다른 시점에 제어 정보를 이동 단말로 전송하고, 상기 분류된 패턴이 같은 셀들의 각 기지국은 동일한 시점에 제어 정보를 이동 단말로 전송한다. 다음, 제어 정보가 전송된 시점 후에, 상기 분류된 패턴에 상관없이 각 기지국이 트래픽 데이터를 이동 단말로 전송한다. 또한, 순방향 채널 할당 방법에서는 트래픽 데이터를 이동 단말이 핸드 오프(hand off) 영역 내에 있는 경우 셀에 대해 서비스 가능한 부반송파를 일정하게 정하여 인접 셀간에 중복되지 않도록 할당한다. 본 발명에 따르면, 인접한 셀들의 부반송파를 셀간 간섭을 최소화하는 방법으로 할당하기 때문에 각 셀들의 전송 용량이 증가한다.
Abstract:
PURPOSE: A method for determining a priority level for packet transmission and a computer-readable recording medium storing the program are provided to give relative priority levels to packets by using delay time characteristics among different traffic packets and differentiate inter-packet priority levels among the same type of traffic. CONSTITUTION: A scheduler starts scheduling at a specific point(S100). The scheduler measures an SNR(Signal to Noise Ratio) of a user terminal(S210). An amount of data stored in a queue is measured(S310). A extent of a provided service during a certain slot is calculated in consideration of an average transmission data amount(S320). A packet interval is measured based on traffic characteristics of data stored in the queue(S410). A delay available time of a packet is calculated by using the packet interval(S420). A priority level of each packet is determined(S500). Data transmission is performed during a certain time with respect to a queue for a user with the highest priority level(S600).
Abstract:
PURPOSE: A device for controlling a reverse multichannel by using a chip offset value and a method therefor are provided to store terminal information to be processed, in a queue according to an arranged state according to the chip offset value, and to control terminals in order of the queue, thereby reducing the possibility of failure to control the terminal information. CONSTITUTION: A demodulator(130) receives terminal information from at least one user terminal(100), and demodulates the information. The first storage(140) stores a demodulated signal for a predetermined time. A demultiplexer(170) inputs multiplexed information from the first storage(140), and demultiplexes the information. A decoder(180) inputs the demultiplexed information to decode the information, and transmits the decoded information to an upper layer(120). The second storage displays a processing result of the terminal information in check bits, and arranges the terminal information according to a chip offset value, then stores the arranged information. A controller(190) controls the demultiplexer(170) and the decoder(180) to process undisposed terminal information.
Abstract:
PURPOSE: The call demanding handoff is hung up on hook when handoff is failed. So the management method is provided to prevent the situation inducing indisposition, and to control the increasing handoff demand call. CONSTITUTION: The mobile terminal of call moves in the a rear of handoff and tries handoff. If adjacent base station does not alot an empty channel to the mobile terminal, the mobile terminal outputs the estimated time staying in handoff area. The mobile terminal sorts the estimated time staying in the area of handoff sequentially, sfter a trial candidate of handoff confirms whether the achieve means of base station is or not. The handoff of adjacent base station is processed.
Abstract:
The present invention relates to a device and a method for transmitting multiple carriers to provide a high-quality service required for terminals using a multicast-based service. A multi-carrier transmission method for a multicast service in a base station using a multi-input/multi-output method according to the present invention comprises the following steps: a mapping step individually mapping first multicast data and second multicast data, which is different from the first multicast data, onto each antenna which is to transmit the data; an intermediate frequency conversion step for converting the first data signal and the second data signal into a predetermined intermediate frequency; a first radio processing step converting the first data signal, which is up-converted to the intermediate frequency, into the frequency of one carrier among nearby multiple carriers, and determining transmission power of the radio signal in order to enable the signal to reach the entire coverage area of a base station. and a second radio processing step converting the second data signal, which is up-converted to the intermediate frequency, into the frequency of another carrier among the nearby multiple carriers, and determining transmission power of the radio signal to be equal to or less than a predetermined threshold value in order to enable the signal to reach only a nearby coverage area of the base station.