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    • 7. 发明申请
    • TECHNIQUES TO MANAGE RETRANSMISSIONS IN A WIRELESS NETWORK
    • 在无线网络中管理恢复的技术
    • WO2006065690A1
    • 2006-06-22
    • PCT/US2005/044773
    • 2005-12-09
    • INTEL CORPORATIONLI, QinghuaHO, Minnie
    • LI, QinghuaHO, Minnie
    • H04L1/16H04L1/18H04L12/28
    • H04L1/18H04L1/16H04L1/1628H04L1/1685H04L1/1809H04L1/1848H04W74/00H04W80/00
    • Multiple MPDUs may be aggregated into a single physical (PHY) protocol data unit (PPDU), as defined by the IEEE 802.11n Proposed Standard. The PPDU may include a block acknowledgement request (BAR). The BAR may indicate the end of a PPDU. When a receiving device receives the PPDU, it waits to receive the BAR. Once the BAR is received, the receiving device may acknowledge receipt of the PPDU using a block acknowledgement (ACK) in response to the BAR. In this manner, the transmitting device may not necessarily need to initiate a new transfer for every single MPDU, thereby potentially increasing transfer efficiency and throughput. A PPDU may include information which can be used to estimate the transmission duration of a given PPDU. Once the transmission duration for a given PPDU is estimated, the receiving device may use the estimate to determine when to generate a block ACK in the event a BAR is delayed or not received at all.
    • 多个MPDU可以聚合成由IEEE 802.11n建议标准定义的单个物理(PHY)协议数据单元(PPDU)。 PPDU可以包括块确认请求(BAR)。 BAR可以指示PPDU的结束。 当接收设备收到PPDU时,它等待接收到BAR。 一旦接收到BAR,接收设备可以使用响应于BAR的块确认(ACK)来确认接收到PPDU。 以这种方式,发送设备可能不一定需要为每个单个MPDU启动新的传输,从而潜在地提高传输效率和吞吐量。 PPDU可以包括可用于估计给定PPDU的传输持续时间的信息。 一旦估计给定PPDU的传输持续时间,接收设备可以使用该估计来确定在BAR被延迟或未被接收的情况下何时生成块ACK。
    • 9. 发明申请
    • PROVIDING CQI FEEDBACK TO A TRANSMITTER STATION IN A CLOSED-LOOP MIMO SYSTEM
    • 向闭环MIMO系统中的发射机站提供CQI反馈
    • WO2007130920A1
    • 2007-11-15
    • PCT/US2007/067813
    • 2007-04-30
    • INTEL CORPORATIONLI, QinghuaLI, GuangjieLIN, XintianHO, Minnie
    • LI, QinghuaLI, GuangjieLIN, XintianHO, Minnie
    • H04B7/04H04B7/26
    • H04L1/0026H04B7/0632H04L1/0003H04L1/0009H04L1/0025H04L1/0029
    • Methods and apparatuses for reducing an amount of bandwidth required for feedback to a transmitter station in a closed-loop multiple-input multiple-output (MIMO) system are described herein. The methods may include initially measuring at a receiver station channel qualities associated with receiving signals from a transmitter station for a first and a second spatial channel, the transmitter and receiver stations employing a closed-loop MIMO system. The receiver station may then determine a first and a second channel quality indicator (CQI) based on the measured channel qualities and may then transmit to the transmitter station the first and the second CQI to directly and indirectly identify a first and a second modulation coding scheme (MCS) entry among a plurality of ordered MCS entries, respectively. The second MCS entry being one of a selected subset of lower ordered MCS entries relative to the first MCS entry. The transmitter station may selectively use the first and the second identified MCS to transmit signals to the receiver station over the first and the second spatial channel, respectively.
    • 这里描述了用于减少在闭环多输入多输出(MIMO)系统中向发射机站的反馈所需的带宽量的方法和装置。 所述方法可以包括在接收机站初始测量与从发射机站接收用于第一和第二空间信道的信号相关联的信道质量,所述发射机和接收机站采用闭环MIMO系统。 接收机站然后可以基于所测量的信道质量来确定第一和第二信道质量指示符(CQI),然后可以向发射机站发送第一和第二CQI以直接和间接地识别第一和第二调制编码方案 (MCS)条目分别在多个有序的MCS条目中。 第二MCS条目是相对于第一MCS条目的低阶MCS条目的选定子集之一。 发射机站可以选择性地使用第一和第二识别的MCS分别在第一和第二空间信道上向接收机站发送信号。