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    • 55. 发明公开
    • MEDIA ACCESS CONTROL PROTOCOL FOR MULTIUSER DETECTION ENABLED AD-HOC WIRELESS COMMUNICATIONS
    • 中华人民共和国电信与安保手册
    • EP2329668A4
    • 2016-06-01
    • EP09829520
    • 2009-09-25
    • COLLISION COMM INC
    • NIEDZWIECKI JOSHUA DHOMBS BRANDON P
    • H04W40/00
    • H04W74/0833H04B1/7105H04L27/0006H04W74/002
    • A method is disclosed for increasing the communication capacity of a shared ad-hoc wireless channel by using multiuser detection (MUD) to distinguish overlapping information transmitted simultaneously by a plurality of nodes. The transmitting nodes simultaneously provide parameter-estimating signals over separate, unshared, low-rate parameter channels generated using orthogonal frequencies, spread spectrum technology, or time multiplexing. Receiving nodes use these separate, non-overlapping parameter-estimating signals to estimate MUD-required signal parameters such as amplitude, phase, and frequency offset, thereby enabling use of lower complexity MUD receivers, because the parameters are not estimated in the presence of other interference. Node ID, spreading code type, and/or other information can also be transmitted over the parameter channels. Limiting the number of parameter channels can limit the maximum number of transmitting nodes. Amplitudes of parameter channel transmissions can be greater than communication channel transmissions by a known ratio. Parameter channels can be frequency-hopped for jam-resistance.
    • 公开了一种用于通过使用多用户检测(MUD)来增加共享自组织无线信道的通信容量以区分由多个节点同时发送的重叠信息的方法。 发射节点同时通过使用正交频率,扩频技术或时间复用产生的分离,非共享,低速率参数信道提供参数估计信号。 接收节点使用这些分离的非重叠参数估计信号来估计诸如幅度,相位和频率偏移的MUD所需要的信号参数,从而使得能够使用较低复杂度的MUD接收机,因为在其它的存在下不估计参数 干扰。 节点ID,扩展码类型和/或其他信息也可以通过参数信道发送。 限制参数通道的数量可以限制发送节点的最大数量。 参数信道传输的幅度可以通过已知比率大于通信信道传输。 参数通道可跳频阻止。
    • 57. 发明公开
    • METHODS AND APPARATUS FOR DEVICE TO DEVICE COMMUNICATIONS
    • 用于设备通信的方法和设备
    • EP3007397A1
    • 2016-04-13
    • EP15187906.1
    • 2012-08-09
    • Qualcomm Incorporated
    • Nan, MingkaiLi, YanChen, Shuping
    • H04L27/26H04W16/14
    • H04W76/023H04L27/0006H04L27/2646H04W72/02H04W76/14
    • Various embodiments are directed to methods and apparatus efficiently utilizing WAN system resources that would otherwise go unused for device to device communications. In one exemplary embodiment the air link resources correspond to Guard Periods (GPs) in Special Sub-Frames of an LTE TDD WAN system. In various embodiments, wireless communications devices (106, 108, 110, 112, 114, 116) e.g., UE devices with device to device communications capability, self-configure to operate using a portion of the GP such as not to interfere with ongoing WAN signaling. Thus the WAN signaling and device to device signaling do not interfere with respect to one another. The D2D device receives from the eNB information concerning the GP duration and the maximum propagation delay in both the WAN and D2D cases and configures based on these informations the transmission and reception timing offsets and the cyclic prefix length for the D2D link.
    • 各种实施例涉及有效利用WAN系统资源的方法和装置,否则这些资源将不用于设备到设备通信。 在一个示例性实施例中,空中链路资源对应于LTE TDD WAN系统的特殊子帧中的保护时段(GP)。 在各种实施例中,例如具有设备到设备通信能力的UE设备的无线通信设备(106,108,110,112,114,116)自我配置为使用GP的一部分进行操作,以便不干扰正在进行的WAN 信号。 因此,WAN信令和设备到设备信令不会相互干扰。 D2D设备从eNB接收关于在WAN和D2D情况下的GP持续时间和最大传播延迟的信息,并且基于这些信息配置D2D链路的发送和接收定时偏移以及循环前缀长度。