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    • 71. 发明授权
    • Link adaptation for LTE uplink
    • LTE上行链路适配
    • US09319928B2
    • 2016-04-19
    • US13744317
    • 2013-01-17
    • Texas Instruments Incorporated
    • Pierre BertrandJing JiangAnthony Ekpenyong
    • H04L12/26H04W28/02H04L1/00H04L1/20H04L1/18
    • H04W28/0236H04L1/0003H04L1/0009H04L1/0017H04L1/0019H04L1/0027H04L1/1816H04L1/203
    • A detailed design of an LTE Link Adaptation function for LTE uplink is disclosed. A new approach for adapting SINR backoff in OLLA is used when serving non-time-sensitive radio bearers without target BLER constraint. A sub-optimal scheduler is also disclosed wherein the SINR measurements at the ILLA input are updated on each TTI for the UEs scheduled in that sub-frame for future UL transmission with a fresher interference measurement from the sub-frame preceding by 8 ms the actual transmission sub-frame. This allows for exploitation of a correlation peak of the interference resulting from HARQ retransmissions. A schedule incorporating these features improves upon, with a minor complexity increase, the spectral efficiency performance of a low-complexity baseline scheduler only based on SINR updates at SRS rate.
    • 公开了用于LTE上行链路的LTE链路适配功能的详细设计。 在不使用目标BLER约束的情况下服务非时间敏感的无线电承载时,将使用适用于OLLA中SINR退避的新方法。 还公开了一种次优调度器,其中在ILLAN输入处的SINR测量在针对在该子帧中调度的UE的每个TTI上被更新以用于将来的UL传输,其中来自前一个子帧的更新的干扰测量在8ms之前,实际 传输子帧。 这允许利用由HARQ重传产生的干扰的相关峰值。 仅基于SRS速率下的SINR更新,结合了这些特征的调度改进了低复杂度基线调度器的频谱效率性能,同时增加了较小的复杂度。
    • 73. 发明申请
    • SIGNALING OF RANDOM ACCESS PREAMBLE SEQUENCES IN WIRELESS NETWORKS
    • 无线网络中随机访问前缀序列的信令
    • US20140341010A1
    • 2014-11-20
    • US14326354
    • 2014-07-08
    • TEXAS INSTRUMENTS INCORPORATED
    • Jing JiangPierre BertrandTarik Muharemovic
    • H04L5/00H04L27/26H04J13/00
    • H04L5/0007H04J13/0059H04J13/0062H04J13/0074H04L27/2601H04L27/2607H04L27/2613H04W74/08
    • Transmission of random access preamble structures within a cellular wireless network is based on the use of cyclic shifted constant amplitude zero autocorrelation (“CAZAC”) sequences to generate the random access preamble signal. A pre-defined set of sequences is arranged in a specific order. Within the predefined set of sequences is an ordered group of sequences that is a proper subset of the pre-defined set of sequences. Within a given cell, up to 64 sequences may need to be signaled. In order to minimize the associated overhead due to signaling multiple sequences, only one logical index is transmitted by a base station serving the cell and a user equipment within the cell derives the subsequent indexes according to the pre-defined ordering. Each sequence has a unique logical index. The ordering of sequences is identified by the logical indexes of the sequences, with each logical index uniquely mapped to a generating index. When a UE needs to transmit, it produces a second sequence using the received indication of the logical index of the first sequence and an auxiliary parameter and then produces a transmission signal by modulating the second sequence.
    • 蜂窝无线网络内的随机接入前同步码结构的传输是基于使用循环移位恒幅零自相关(“CAZAC”)序列来生成随机接入前同步信号的。 按照特定顺序排列预定义的序列集合。 在预定义的序列集合内,是序列的有序组,其是预定义序列集合的适当子集。 在给定的小区内,可能需要发信号通知多达64个序列。 为了最小化由于信令多个序列引起的相关开销,仅由服务于小区的基站发送一个逻辑索引,并且小区内的用户设备根据预定义的顺序导出后续索引。 每个序列都有唯一的逻辑索引。 序列的顺序由序列的逻辑索引识别,每个逻辑索引唯一映射到生成索引。 当UE需要发送时,它使用接收到的第一序列的逻辑索引的指示和辅助参数产生第二序列,然后通过调制第二序列来产生传输信号。