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    • 12. 发明申请
    • METHODS AND SYSTEMS FOR HARQ PROTOCOLS
    • HARQ协议的方法和系统
    • US20110041027A1
    • 2011-02-17
    • US12988717
    • 2009-04-21
    • Mo-Han FongSophie VrzicRobert NovakJun YuanDong-Sheng Yu
    • Mo-Han FongSophie VrzicRobert NovakJun YuanDong-Sheng Yu
    • H04L1/18H04W72/04
    • H04L1/1812H04L1/0003H04L1/0009H04L1/1816H04L1/1861H04L1/1887H04L1/1896H04L5/0055H04L5/14H04L27/2659H04L27/2666H04W28/04H04W72/005H04W72/042H04W72/044H04W72/0446H04W72/0453H04W72/1257H04W72/1268H04W88/04H04W88/06
    • Methods described herein are for wireless communication systems. One aspect of the invention is directed to a method for a HARQ process, in which the HARQ process includes a first transmission of an encoder packet and at least one retransmission. The method involves allocating a transmission resource for each respective transmission. The method involves transmitting control information from a base station to a mobile station for each respective transmission. The control information includes information to uniquely identify the HARQ process and an identification of one of a time resource, a frequency resource and a time and frequency resource that is allocated for the transmission. In some embodiments of the invention, specific control information is signalled from a base station to a mobile station to enable RAS-HARQ operation. In some embodiments of the invention, retransmission signaling in included as part of regular unicast signaling used for both first transmission and retransmissions. In some embodiments of the invention, a 3-state acknowledgement channel and associated error recovery operation enables the base station and mobile station to recover from control signaling error and reduce packet loss.
    • 本文描述的方法用于无线通信系统。 本发明的一个方面涉及一种用于HARQ过程的方法,其中所述HARQ过程包括编码器分组的第一传输和至少一个重传。 该方法包括为每个相应的传输分配传输资源。 该方法涉及从每个相应传输的基站向移动台发送控制信息。 控制信息包括用于唯一地识别HARQ过程的信息和为传输分配的时间资源,频率资源和时间和频率资源之一的标识。 在本发明的一些实施例中,从基站向移动台发信号通知特定的控制信息以启用RAS-HARQ操作。 在本发明的一些实施例中,包括作为用于第一传输和重传的常规单播信令的一部分的重传信令。 在本发明的一些实施例中,3状态确认信道和相关联的错误恢复操作使得基站和移动台能够从控制信令错误中恢复并减少分组丢失。
    • 19. 发明授权
    • Pilot design for wireless system
    • 无线系统的试点设计
    • US08537915B2
    • 2013-09-17
    • US13476242
    • 2012-05-21
    • Dong-Sheng YuMo-Han FongJianglei MaSophie VrzicHang Zhang
    • Dong-Sheng YuMo-Han FongJianglei MaSophie VrzicHang Zhang
    • H04K1/10
    • H04L27/2613H04B7/0413H04B7/0621H04L5/0023H04L5/0048H04L25/0204H04L25/0226H04L27/26H04L27/2611H04L27/2647H04L27/2662H04L2025/03414
    • The description herein relates to pilot designs for an Orthogonal Frequency Division Multiplexing (OFDM) based communication system. In the preferred embodiment, the communication system is one operating according to the IEEE 802.16m, or WiMax, standard. In general, an OFDM transmitter operates to insert pilot symbols into a resource of a transmit frame according to a predetermined staggered pilot symbol pattern defining pilot symbol locations within the resource of the transmit frame. The predetermined pilot symbol pattern is defined such that pilot symbols are located at or near time boundaries of the resource, at or near frequency boundaries of the resource, or both. By doing so, when generating a channel estimate for the communication channel between the OFDM transmitter and an OFDM receiver based on the pilot symbols, extrapolations needed to estimate the channel near the boundaries of the resource are optimized, thereby improving overall channel estimation accuracy.
    • 这里的描述涉及用于基于正交频分复用(OFDM)的通信系统的导频设计。 在优选实施例中,通信系统是根据IEEE 802.16m或WiMax标准进行操作的通信系统。 通常,OFDM发射机操作以根据在发送帧的资源内定义导频符号位置的预定交错导频符号模式将导频符号插入到发射帧的资源中。 定义的导频符号模式被定义为使得导频符号位于资源的时间边界处或附近,在资源的频率边界处或附近,或两者附近。 通过这样做,当基于导频符号生成OFDM发射机和OFDM接收机之间的通信信道的信道估计时,优化估计资源边界附近的信道所需的外推,从而提高整体信道估计精度。