Abstract:
적응형 방식은 무선 노드들에 의한 간섭 관리 메시지들의 송신을 제어한다. 예를 들어, 적응형 방식은 자원 사용 메시지들을 송신할지 여부 및/또는 송신하는 방법을 결정하기 위해 사용될 수 있다. 그러한 결정은 예를 들어, 서비스 품질 임계값과 수신되는 데이터와 연관된 현재의 서비스 품질 레벨의 비교에 기초할 수 있다. 서비스 품질 임계값은 이전에 송신된 자원 사용 메시지들의 효과에 기초하여 조정될 수 있다. 주어진 무선 노드에 대한 서비스 품질 임계값은 무선 노드가 자원 사용 메시지들을 송신하는 빈도에 기초하여 조정될 수 있다. 주어진 무선 노드에 대한 서비스 품질 임계값은 다른 무선 노드로부터 수신되는 정보에 기초하여 조정될 수 있다. 조정 방식은 또한 주어진 무선 노드에 의해 수신되는 트래픽의 타입에 좌우될 수 있다. 서비스 품질 임계값은 또한 처리량 정보에 기초하여 조정될 수 있다.
Abstract:
PROBLEM TO BE SOLVED: To provide a method and an apparatus for channel estimation in a system employing different transmission protocols as a broadcast/multicast protocol and a unicast protocol, wherein the number of a pilot tone used for broadcast transmission is greater than the number of a pilot tone used for a unicast transmission and quality of a symbol from a broadcast transmission slot is not deteriorated even when the symbol is adjacent to a symbol from a unicast transmission slot.SOLUTION: In the method, it is determined whether a first time-slot (multicast slot) of one transmission protocol is adjacent to a second time-slot (unicast slot) of another transmission protocol or not. The number of pilot power and/or a pilot sub-carrier is/are increased for an edge symbol of the multicast slot for a purpose of channel estimation using the edge symbol.
Abstract:
PROBLEM TO BE SOLVED: To provide a technique for transmitting variable transmission in a wireless communication system. SOLUTION: Physical channels to be sent in a super-frame are identified and allocated to time slots in the super-frame. The coding and modulation for each physical channel are selected based on its capacity. The data for each physical channel is selectively encoded based on an outer code rate, e.g., for a Reed-Solomon code, and further encoded based on an inner code rate, e.g., for a Turbo code. The encoded data for each physical channel is mapped to modulation symbols based on a selected modulation scheme. The modulation symbols for each physical channel are further processed (e.g., OFDM modulated) and multiplexed onto the time slots allocated to the physical channel. COPYRIGHT: (C)2011,JPO&INPIT
Abstract:
PROBLEM TO BE SOLVED: To provide a frame structure and a transmission technique which are capable of providing satisfactory performance for different types of transmissions in a wireless communication system.SOLUTION: A super-frame includes multiple outer frames, each outer frame includes multiple frames, and each frame includes multiple time slots. The time slots are allocated to a downlink and an uplink and to different radio technologies (e.g., W-CDMA(R) and OFDM) on the basis of loading. At least one time slot in at least one frame of each outer frame in the super-frame is allocated to each physical channel. The OFDM and the W-CDMA are generated for each downlink OFDM slot and for each downlink W-CDMA slot, respectively, and multiplexed. A modulated signal is generated for the multiplexed W-CDMA and OFDM waveforms, and transmitted on the downlink.
Abstract:
PROBLEM TO BE SOLVED: To provide a frame structure and a transmission technique for a wireless communication system. SOLUTION: In a single frame structure 200, a superframe includes a plurality of outer frames, each of the outer frames includes a plurality of frames, and each of the frames includes a plurality of time slots. The time slots in each superframe are allocated to downlink and uplink and to different wireless techniques (for example, W-CDMA and OFDM) based on loading. Each physical channel is allocated to time slots in the frames of each outer frame in the superframe. An OFDM waveform is generated for an OFDM slot of each downlink, a W-CDMA waveform is generated for a W-CDMA slot of each downlink, and the waveforms are multiplexed on each slot. A modulation signal is generated for the multiplexed W-CDMA and OFDM waveform and transmitted on the downlink. COPYRIGHT: (C)2011,JPO&INPIT
Abstract:
PROBLEM TO BE SOLVED: To provide a wireless communication system with a configurable cyclic prefix length. SOLUTION: To transmit data in a manner to mitigate the deleterious effects of delay spread, the expected coverage areas for multiple transmissions to be sent in multiple time slots are initially determined. Cyclic prefix lengths for these transmissions are selected based on the expected coverage areas. The cyclic prefix length for each transmission may be selected from among a set of allowed cyclic prefix lengths on the basis of the expected coverage area for that transmission, the pilot staggering used for the transmission, and so on. For example, a shorter cyclic prefix length may be selected for each local transmission, and a longer cyclic prefix length may be selected for each wide-area transmission. The selected cyclic prefix lengths may be signaled to the terminals. COPYRIGHT: (C)2011,JPO&INPIT
Abstract:
Providing for dynamic resource provisioning in wireless communication is described herein. By way of example, various wireless performance metrics are collected by respective network access points as an aggregate measure of wireless network performance. Aggregated data can be utilized to generate a performance model for the network and for individual access points. Changes to the data are updated to the model to provide a steady-state characterization of network performance. Wireless resources are generated for respective access points in a manner that optimizes wireless performance. Additionally, resource assignments can be updated at various intervals to re-optimize for existing wireless conditions, whether event driven or based on performance metrics. Accordingly, a robust and dynamic optimization is provided for wireless network resource provisioning that can accommodate heterogeneous access point networks in a changing topology.
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:
Systems and methods are described that facilitate evaluating conditions of nodes (e.g., access points, access terminals, etc.) in a wireless communication environment to determine a level of disadvantage for a given node relative to other nodes. A first node may receive a resource utilization message (RxRUM) and may determine a level of disadvantage for a node that sent the RxRUM. The first node may then compare its own level of disadvantage to the sending node in order to permit a determination of an appropriate course of action in response to the RxRUM.