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    • 3. 发明申请
    • REFERENCE SIGNALS IN WIRELESS COMMUNICATION
    • 无线通信中的参考信号
    • WO2015071001A1
    • 2015-05-21
    • PCT/EP2014/068664
    • 2014-09-03
    • FUJITSU LIMITEDFANG, YiweiMOULSLEY, Timothy
    • FANG, YiweiMOULSLEY, Timothy
    • H04W72/04
    • H04L5/0048H04W72/04
    • In a LTE-based wireless communication system, a Demodulation Reference Symbol (DMRS) pattern is placed in Resource Element (RE) locations which can be reserved for Common Reference Symbol (CRS) ports. There will be various possibilities in the placement of DMRS in the CRS potential locations, depending on the number of CRS ports required, the number of REs required for DMRS in each cell, and the number of cells for which those DMRSs need to be orthogonal to reduce interference. The new DMRS pattern will be orthogonal to the legacy DMRS patterns therefore not causing any mutual interference. This new pattern will reuse the CRS locations which may be reserved for CRS but not needed to be configured as CRSs in the Small cell environment. The new DMRS patterns will take up fewer REs in an LTE Resource Block (RB) than the current DMRS design, and also allow different REs to be used in neighbouring cells, using the same cell dependent frequency shifts as for CRS.
    • 在基于LTE的无线通信系统中,解调参考符号(DMRS)模式被放置在资源元素(RE)位置中,可以为公共参考符号(CRS)端口保留。 根据所需的CRS端口的数量,每个单元中的DMRS所需的RE数量以及这些DMRS需要正交的单元数量,将在CRS潜在位置中放置DMRS将有各种可能性 减少干扰。 新的DMRS模式将与传统DMRS模式正交,因此不会引起任何相互干扰。 这种新模式将重用可能为CRS保留的CRS位置,但不需要在小型单元环境中配置为CRS。 新的DMRS模式将在LTE资源块(RB)中占用比当前DMRS设计更少的RE,并且还允许使用与CRS相同的小区相关频移在相邻小区中使用不同的RE。
    • 4. 发明申请
    • CONTENTION-FREE ACCESS IN WIRELESS COMMUNICATION SYSTEM
    • 无线通信系统中的无连接接入
    • WO2015071000A1
    • 2015-05-21
    • PCT/EP2014/068663
    • 2014-09-03
    • FUJITSU LIMITEDFANG, YiweiMOULSLEY, Timothy
    • FANG, YiweiMOULSLEY, Timothy
    • H04W74/00H04W74/04
    • H04W74/04H04W4/06H04W72/042H04W74/0833H04W76/27
    • A contention-free activation/deactivation mechanism in PRACH, which allows dynamic allocation of the contention-free and contention-based preambles. This allows contention-free preambles which have been allocated to a UE to be revoked once contention-free operation is no longer needed, or cannot be supported due to a shortage of preambles. In one embodiment, a terminal is configured (S12) with a contention-free preamble by specific signalling, and thereafter monitors periodic broadcasts (S14) indicating the set of contention-free preambles; if the configured preamble is within the set (S16, "Y"), the preamble is activated for contention-free operation (S18); otherwise (S16, "N"), the preamble is deactivated and the terminal should follow the contention-based procedure (S20).
    • PRACH中的无竞争激活/停用机制,允许动态分配无竞争和争用的前导码。 这允许一旦不再需要无竞争的操作就已经分配给UE的无竞争的前导码被撤销,或者由于前导码短缺而不能被支持。 在一个实施例中,通过特定信令将终端配置为具有无争用前导码的终端(S12),然后监视指示该无竞争前置码组的周期性广播(S14) 如果配置的前导码在集合内(S16,“Y”),则前导码被激活用于无争用操作(S18); 否则(S16,“N”),前导码被去激活,并且终端应该遵循基于争用的过程(S20)。
    • 6. 发明申请
    • SYNCHRONIZATION SIGNALS IN A WIRELESS COMMUNICATION SYSTEM
    • 无线通信系统中的同步信号
    • WO2013113361A1
    • 2013-08-08
    • PCT/EP2012/051452
    • 2012-01-30
    • FUJITSU LIMITEDWEBB, MatthewMOULSLEY, TimothyFANG, Yiwei
    • WEBB, MatthewMOULSLEY, TimothyFANG, Yiwei
    • H04L5/00
    • H04W56/00H04L5/0023H04L5/0035H04L5/0048H04L5/0053H04L5/0073H04L5/0094
    • Cell-specific or transmission point (TP)-specific information is indicated to a UE based on the subframe in which a cell/TP transmits its primary and secondary synchronization sequences (PSS and SSS). The principal scenario of interest is a dense deployment of picocells/TPs which are under the control of an overlaid macrocell's eNodeB. Since the antenna port from which PSS/SSS are transmitted can change between subframes, the invention associates some information (such as zero power CSI-RS) related to the picocell/TP transmitting the PSS/SSS with a particular PSS/SSS and subframe combination. The table of associations can be provided by signalling from the macrocell eNodeB, and the information being associated can then be obtained by the UE from any picocell/TP it is in range of without additional signalling being necessary.
    • 基于小区/ TP发送其主要和次要同步序列(PSS和SSS)的子帧,向UE指示小区特定或传输点(TP)特定信息。 感兴趣的主要场景是微控制器/ TP的密集部署,它们处于覆盖的宏小区的eNodeB的控制之下。 由于发送PSS / SSS的天线端口可以在子帧之间改变,本发明将与发送PSS / SSS的微微小区/ TP有关的一些信息(例如零功率CSI-RS)与特定的PSS / SSS和子帧组合相关联 。 可以通过来自宏小区eNodeB的信令来提供关联表,并且然后可以由UE从任何微微小区/ TP获得所关联的信息,其在不需要附加信令的范围内。
    • 7. 发明申请
    • SECONDARY CELL SYNCHRONIZATION
    • 二次细胞同步化
    • WO2016074810A1
    • 2016-05-19
    • PCT/EP2015/065982
    • 2015-07-13
    • FUJITSU LIMITEDFANG, YiweiMOULSLEY, Timothy
    • FANG, YiweiMOULSLEY, Timothy
    • H04W56/00
    • H04W56/0015
    • In an LTE-based wireless communication system, a mechanism is provided for allowing the information regarding the time/frequency synchronization of a second cell (22) to be transmitted to a terminal (10) from a first cell (20 or 21). This accurate time/frequency information sharing in this way is possible when the two cells are located close to each other. The purpose of such synchronization information sharing is that the second cell (22) can switch off its transmission of the normal signals for cell identification such as PSS/SSS/CRS if active, or discovery reference signal DRS when it is in the off mode. The terminal (10) will be able to obtain the synchronization information from the first cell (20 or 21). The terminal (10) may be instructed that it should derive the synchronization from that of the first cell, or to allow the first cell to convey directly the synchronization information to the terminal. The proposed invention allows terminals to synchronize with cells in off-mode, even when they are not transmitting signals such as the DRS.
    • 在基于LTE的无线通信系统中,提供了一种机制,用于允许关于第二小区(22)的时间/频率同步的信息从第一小区(20或21)发送到终端(10)。 当两个单元彼此靠近时,以这种方式这种准确的时间/频率信息共享是可能的。 这种同步信息共享的目的在于,如果第二小区(22)处于关闭模式,那么第二小区(22)可以关闭其用于诸如PSS / SSS / CRS的正常信号(例如PSS / SSS / CRS)的传输,或者当发现参考信号DRS处于关闭模式时。 终端(10)将能够从第一小区获得同步信息(20或21)。 可以指示终端(10)应该从第一小区的端点导出同步,或允许第一小区直接向终端传送同步信息。 所提出的发明允许终端与非模式的小区同步,即使它们不发送诸如DRS的信号。
    • 9. 发明申请
    • UPLINK CHANNEL FOR WIRELESS COMMUNICATION
    • 上网通道无线通信
    • WO2013110331A1
    • 2013-08-01
    • PCT/EP2012/051144
    • 2012-01-25
    • FUJITSU LIMITEDWEBB, MatthewTESANOVIC, MilosMOULSLEY, TimothyFANG, Yiwei
    • WEBB, MatthewTESANOVIC, MilosMOULSLEY, TimothyFANG, Yiwei
    • H04L5/00
    • H04W72/04H04L5/0094
    • A new random access (RA) procedure designed for a scenario where a large number of low-cost and low-capability LTE devices are deployed within a coverage area. After an initial, contention-based RA procedure, the network assigns the UE fixed PRACH resources in time (and possibly frequency) and a fixed RA preamble for use in future RA procedures. The RA preambles are therefore multiplexed in time, increasing their effective number. The eNodeB maintains a list of UE identity to preamble+resources associations and is thus able to identify which UE is accessing PRACH in a given subframe. To allow a UE to indicate that it is suitable for inclusion in this new procedure, a means of using the RA procedure to transmit information earlier in the access procedure is designed. The set of all permissible preambles is partitioned and each partition is associated with a particular state of the UE with respect to the information it wishes to transmit. To indicate its state, the UE chooses a preamble in the initial contention-based RA procedure from the relevant partition, rather than at random. The eNodeB is able similarly to indicate information to the UE by its choice of preamble+resource in the new RA procedure.
    • 一种新的随机接入(RA)程序,其设计用于在覆盖区域内部署大量低成本和低能力的LTE设备的场景。 在初始的基于竞争的RA过程之后,网络在时间上(以及可能的频率)分配UE固定的PRACH资源和固定的RA前同步码,用于将来的RA过程。 因此,RA前导码在时间上被多路复用,增加了它们的有效数量。 eNodeB将UE标识的列表维护到前导码+资源关联,并且因此能够识别在给定子帧中哪个UE正在访问PRACH。 为了允许UE指示它适合包含在这个新的过程中,设计了一种使用RA过程在接入过程中更早地发送信息的方法。 所有允许的前导码的集合被分割,并且每个分区相对于其希望发送的信息与UE的特定状态相关联。 为了指示其状态,UE从相关分区而不是随机地在基于初始争用的RA过程中选择前导码。 eNodeB能够类似地通过在新的RA过程中选择前导码+资源来向UE指示信息。