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    • 7. 发明授权
    • Random access method and device in cognitive radio system
    • 认知无线电系统中随机接入方式和设备
    • US09210726B2
    • 2015-12-08
    • US14365202
    • 2012-09-11
    • Wenling BaiZhuo GaoChenggang JiangYuanyuan LiYu Yang
    • Wenling BaiZhuo GaoChenggang JiangYuanyuan LiYu Yang
    • H04W4/00H04W74/08H04W36/00H04W74/00H04W36/04
    • H04W74/0833H04B2201/692H04W36/0055H04W36/0077H04W36/04H04W36/06H04W74/008H04W74/085
    • Various examples of the present disclosure describe a random access method and device in a CR system. The method includes: generating, by a base station device, a spectrum handover command, wherein the spectrum handover command comprises random access backoff time parameter information; and sending, by the base station device, the spectrum handover command to a user equipment in a cell to instruct the UE to initiate, during a spectrum handover procedure, a random access procedure using the random access backoff time parameter information. According to the various examples of the present disclosure, the random access backoff time parameter information is carried in the spectrum handover command, so that a random access conflict is suppressed during the spectrum handover procedure of the CR system. A large number of UEs that intensively perform random access on a target working frequency are pre-dispersed in time. As such, the delay and the failure probability of the random access on the target working frequency during the spectrum handover procedure are reduced, and thus the failure probability of the spectrum handover and the service interruption time are reduced, so that the user experience of the CR system is improved.
    • 本公开的各种示例描述了CR系统中的随机访问方法和设备。 该方法包括:由基站装置生成频谱切换命令,其中频谱切换命令包括随机接入退避时间参数信息; 以及由所述基站装置向所述小区中的用户设备发送所述频谱切换命令,以指示所述UE在频谱切换过程期间使用所述随机接入退避时间参数信息来发起随机接入过程。 根据本公开的各种示例,在频谱切换命令中携带随机接入退避时间参数信息,从而在CR系统的频谱切换过程期间抑制随机接入冲突。 在目标工作频率上集中执行随机访问的大量UE预先分散在时间上。 因此,在频谱切换过程中随机接入对目标工作频率的延迟和故障概率降低,从而降低了频谱切换和业务中断时间的故障概率,使得用户体验 CR系统得到改进。
    • 10. 发明申请
    • METHOD AND NODE RELATED TO CHANNEL ESTIMATION
    • 与通道估计相关的方法和节点
    • US20140247747A1
    • 2014-09-04
    • US14350920
    • 2011-10-13
    • LuSheng YuBo GöranssonJinliang HuangYu Yang
    • LuSheng YuBo GöranssonJinliang HuangYu Yang
    • H04W24/02H04L25/02
    • H04W24/02H04J11/005H04L25/0202H04L25/0208H04L27/2647
    • A method comprises determining a first and a second sub-carrier associated with a channel, and multiplying a signal received on the first sub-carrier with a first number to form a first resulting signal. The first number multiplied with a known signal transmitted by a second transmitting node on the first sub-carrier equals a constant value. A signal received on the second sub-carrier is multiplied with a second number to form a second resulting signal. The second number multiplied with the known signal transmitted by the second transmitting node on the second sub-carrier equals the constant value. The second resulting signal is subtracted from the first resulting signal to obtain a signal for which interference from the second transmitting node is suppressed, and the channel is estimated based on the obtained signal.
    • 一种方法包括确定与信道相关联的第一和第二子载波,以及将在第一子载波上接收的信号与第一数量相乘以形成第一结果信号。 与第一子载波上的第二发送节点发送的已知信号相乘的第一个数字等于一个恒定值。 在第二子载波上接收的信号乘以第二数字以形成第二结果信号。 与第二子载波上的第二发送节点发送的已知信号相乘的第二数字等于该常数值。 从第一结果信号中减去第二结果信号,以获得抑制来自第二发送节点的干扰的信号,并且基于获得的信号来估计信道。