Abstract:
The present invention relates to a dynamic memory management apparatus. The disclosed memory management apparatus includes: a free pointer stack unit which stores allocation information and release information for a physical packet memory, and allocates a top free packet pointer when allocation of the packet memory is required; and a memory management unit which receives a packet allocated by the free pointer stack unit and stores a physical address, transmits, to a microprocessor, a logical address corresponding to the stored physical address to allocate memory, and converts the logical address into the physical address and transmits the physical address to a memory controller, when the microprocessor accesses the logical address. The present invention as describe above can allow the microprocessor to use memory that is not physically consecutive like the memory is, and can also perform memory allocation and release, thereby reducing overhead of the microprocessor.
Abstract:
PURPOSE: A memory management device is provided to efficiently manage a memory by managing the memory by fixed packet unit and allocating the memory by variable packet unit. CONSTITUTION: A management unit(301) divides a memory into packet areas based on the size of a set packet and classifies the packet areas into multi packet areas. If first and second packet areas in the multi packet areas are not free, a processor(303) is interlinked with a packet area allocation request to compose a third packet including partial areas of the first and the second packet areas. The processor allocates the third packet area in response to the request. The processor is interlinked with a packet area return request to select and return one of the multi packet areas. [Reference numerals] (301) Management unit; (303) Processor
Abstract:
단말의 상태를 제어하는 장치 및 방법이 개시된다. 단말의 상태는 연결 상태와 휴지 상태를 포함하고, 연결 상태는 활성 상태와 휴면 상태를 포함한다. 그리고 활성 상태는 스케줄링 상태와 스케줄링 제외 상태를 포함한다. 상태 제어 장치의 무선 자원 제어(Radio Resource Control, RRC) 계층은 활성 상태와 휴면 상태 사이의 천이를 제어하고, 상태 제어 장치의 매체 접근 제어(Media Access Control, MAC) 계층은 스케줄링 상태와 스케줄링 제외 상태 사이의 천이를 제어한다. 서비스 품질, 활성 상태, 휴면 상태, 휴지 상태, 스케줄링
Abstract:
PURPOSE: An apparatus and method for estimating a channel in a frequency domain are provided to estimate a channel using a cell specified reference signal and a user specified reference signal. CONSTITUTION: A data receiving unit(200) receives data by including a plurality of antennas. The data receiving unit converts a received RF band signal into a baseband signal. A CP(Cyclic Prefix) is removed from the converted signal. A frequency selection degree obtaining unit(210) obtains a frequency selection degree of received data. The frequency selection degree obtaining unit includes a noise signal distribution calculating unit(214) and a signal to noise ratio calculating unit(216). The signal to noise ratio calculating unit calculates a signal to noise ratio using a channel frequency response. A channel estimating unit(220) estimates a channel frequency response by a selected channel estimating technique.
Abstract:
A method for transmitting and receiving random access response information in a radio communication system, a base station device and a terminal unit thereof are provided to support the variable and flexible management for the wireless resources of a physical layer by configuring response information when utilizing or allocating radio resources. A terminal transmits a random access preamble to a base station(S101). When the base station detects the access preamble transmitted from the terminal, the base station transmits a response message including the sequence to the terminal(S103). The terminal transmits setup request information to the base station by using uplink radio resource allocation information(S105), and the base station transmits the response control information for the setup request information(S107).
Abstract:
본 발명은 OFDM/CDMA 방식에 적용될 수 있는 IFFT/FFT 블록 및 타이밍 동기 방법에 관한 것으로, FFT 블럭, 다음 단의 상관연산 블럭의 출력값을 이용하여 FFT 블럭 입력값의 순서 즉, 블럭 동기를 맞추고 샘플을 선택하여 타이밍 동기를 맞추므로써 대역의 낭비없이 빠르고 정확한 동기를 획득할 수 있는 효과가 있다.
Abstract:
본 발명은 OFDM/CDMA 방식에 적용될 수 있는 IFFT/FFT 블록 및 타이밍 동기 방법에 관한 것으로, FFT 블럭, 다음 단의 상관연산 블럭의 출력값을 이용하여 FFT 블럭 입력값의 순서 즉, 블럭 동기를 맞추고 샘플을 선택하여 타이밍 동기를 맞추므로써 대역의 낭비없이 빠르고 정확한 동기를 획득할 수 있는 효과가 있다.