Abstract:
Frame structures and transmission techniques for a wireless communication system are described. In one frame structure, a super-frame includes multiple outer-frames, and each outer-frame includes multiple frames, and each frame includes multiple time slots. The time slots in each super-frame are allocated for downlink and uplink and for different radio technologies (e.g., W-CDMA and OFDM) based on loading. Each physical channel is allocated at least one time slot in at least one frame of each outer-frame in the super-frame. An OFDM waveform is generated for each downlink OFDM slot and multiplexed onto the slot. A W-CDMA waveform is generated for each downlink W-CDMA slot and multiplexed onto the slot. A modulated signal is generated for the multiplexed W-CDMA and OFDM waveforms and transmitted on the downlink. Each physical channel is transmitted in bursts. The slot allocation and coding and modulation for each physical channel can change for each super-frame.
Abstract:
An apparatus and a method for reducing a transmission-over-head in a broadband wireless communication system are provided to reduce the transmission-over-head by inserting allocation information of a data burst into a burst preamble in a wireless communication system based on OFDM(Orthogonal Frequency Division Multiplexing). An apparatus for reducing a transmission-over-head in a broadband wireless communication system includes a head generator(501), and a traffic channel forming unit(505). The head generator(501) generates a head including data allocation information and control information of each frame to be transmitted. The traffic channel forming unit(505) forms a traffic channel by combining the generated head with a burst. Each frame is allocated to one user for total frequency band. Transmission data is allocated on each frame according to a time resource. The data allocation information includes a user ID(Identification), a time domain start point of the burst, and a length of the burst to be allocated on the frame.
Abstract:
본 발명은 에러 정정 패킷에 의해 보호된 디지털 데이터 패킷을 송신하는 방법에 관한 것으로, 특히 송신에 도입된 대기시간을 제한하면서 에러 정정 방법의 정정 효율성을 증가시키도록, 데이터 패킷 스트림 내로 이들 정정 패킷을 삽입하는 방식에 관한 것이다. 이러한 패킷은 매트릭스 방식으로 배열되고, 에러 패킷이 라인과 열에 대해 계산되며, 그것들이 보호하는 데이터 패킷으로부터 충분한 거리를 두고 스트림 내로 규칙적으로 삽입된다.
Abstract:
A wakeup method for a network device in a Zigbee system is provided to minimize unnecessary power consumption in a Zigbee system requiring a lower power characteristic by forwarding information about an error of a beacon frame transmission period, determined at a network coordinator, to a network device so that the network device can wake up at a suitable time according to the error. A network coordinator determines an error of the transmission period of a beacon frame to be transmitted to a network device(S11). The network coordinator inserts the determined beacon frame transmission period error in the beacon frame(S12). The network coordinator transmits the beacon frame containing the error to the network device(S13). Receiving the beacon frame, the network device stores the received beacon frame in its own internal memory(S21,S22). The network device reads the error inserted into the beacon frame and determines the point of time for turning on a receiver(S23).
Abstract:
멀티미디어 브로드캐스트/멀티 캐스트 서비스(Multimedia Broadcast/Multicast Service)에 있어서, 각 이동국에 대한 적절한 수신 품질 제어를 실시하기 위하여, 계층 부호화부(101)에서는, 입력되는 데이터를 2개 계층으로 나누어 부호화하여, 제1 계층 부호 계열과 제2 계층 부호 계열을 얻게 된다. 제1 계층 부호 계열은 CRC 부호 부가부(102)에 입력되어, 소정의 블록마다 오류 검사를 위한 CRC 부호가 부하된다. 또, 제2 계층 부호 계열은 CRC 부호 부가부(103)에 입력되어 소정의 블록마다 오류 검사를 위한 CRC 부호가 부하된다. CRC 부호 부가된 제1 계층 부호 계열 및 제2 계층 부호 계열은 계층 변조부(104)에 입력되고, 계층 변조부(104)가, 복수의 계층으로 나누어 부호화 된 복수의 부호 계열을, 복수의 부호 계열 간에 오류율이 계층적으로 다르도록 변조하고, 무선부(105)가 변조 후의 심볼을 송신한다.
Abstract:
A method for constructing a digital broadcasting transport stream packet to improve receiving performance, a digital broadcasting transmitter and a signal processing method of the digital broadcasting transmitter are provided to improve digital broadcasting receiving performance in a poor multipath channel and maintain compatibility with the existing digital broadcasting transceiver system. A method for constructing a digital broadcasting transport stream packet including a header and a payload inserts known supplementary reference sequence data for synchronization into the digital broadcasting transport stream packet. The digital broadcasting transport stream packet further includes an adaptation field. The supplementary reference sequence data is inserted into at least a part of the adaptation field. The adaptation field includes an option field corresponding to at least one of a program clock reference, an original program clock reference, macro countdown, a transport private data length and an adaptation field extension length.
Abstract:
Transmission techniques are provided that improve service continuity and reduce interruptions in delivery of content that can be caused by transitions that occur when the User Equipment (UE) moves from one cell to the other, or when the delivery of content changes from a Point-to-Point (PTP) connection to a Point-to- Multipoint (PTM) connection in the same serving cell, and vice-versa. Such transmission techniques enable seamless delivery of content across cell borders and/or between different transmission schemes such as Point- to-Multipoint (PTM) and Point-to-Point (PTP). Mechanisms for adjusting different streams and for recovering content from each data block during such transitions are also provided so that data is not lost during a transition. In addition, mechanisms for realigning data during decoding at a receiving terminal are also provided.
Abstract:
Transmission techniques are provided that improve service continuity and reduce interruptions in delivery of content that can be caused by transitions that occur when the User Equipment (UE) moves from one cell to the other, or when the delivery of content changes from a Point-to-Point (PTP) connection to a Point-to- Multipoint (PTM) connection in the same serving cell, and vice-versa. Such transmission techniques enable seamless delivery of content across cell borders and/or between different transmission schemes such as Point- to-Multipoint (PTM) and Point-to-Point (PTP). Mechanisms for adjusting different streams and for recovering content from each data block during such transitions are also provided so that data is not lost during a transition. In addition, mechanisms for realigning data during decoding at a receiving terminal are also provided.
Abstract:
1xRTT 및 1xEVDV 양자 모두를 제공하는 CDMA 통신 시스템의 이동국(12) 또는 송수신 기지국(18)과 같은 통신 스테이션의 RLP 논리 레이어(38) 오퍼레이션들을 제어하는 장치, 및 그와 관련된 방법. RLP 오퍼레이션들을 용이하게 하기 위해, RLP 논리 레이어(38)에 현존하는 데이터 서비스 선택 사항들에 대한 변경이 제공된다.
Abstract:
The problems of pseudo-synchronization and out-of-synchronization caused by erroneous detection of synchronization codes of an encoder in which an error correction/detection coding and a synchronism restoring method using synchronization codes. There are provided a coding unit (212) for encoding a sequence of inputted multiplex codes (201) into error correction/detection codes comprising information bits and inspection bits; and a code sequence assembling unit (213) for assembling a sequence of output codes (205) by inserting a synchronization code into any of a plurality of periodically predetermined synchronization code insertion positions in the code sequence (201) and by arranging the information bits in arbitrary positions in the code sequence and the inspection bits in positions other than the synchronization code insertion positions in the code sequence (201).