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    • 31. 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。
    • 32. 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)。
    • 35. 发明申请
    • METHOD AND APPARATUS FOR MODE-SWITCHING AT A BASE STATION
    • 在基站模式切换的方法和装置
    • WO2012146295A1
    • 2012-11-01
    • PCT/EP2011/056792
    • 2011-04-28
    • FUJITSU LIMITEDLI, ZhaojunBUCKNELL, PaulMOULSLEY, TimothyKAWASAKI, Yoshihiro
    • LI, ZhaojunBUCKNELL, PaulMOULSLEY, TimothyKAWASAKI, Yoshihiro
    • H04W28/08
    • H04B7/155H04W16/16H04W16/26H04W28/08H04W84/045H04W88/08
    • Embodiments of the present invention provide a base station arranged to operate in a wireless communications system as a booster base station providing a cell which is operable as a booster cell providing additional capacity to a coverage cell which it at least partially overlaps, the booster cell being operable to function in a first mode and a second mode, wherein the booster cell provides more additional capacity to the coverage cell when functioning in the first mode than it does when functioning in the second mode, the booster base station comprising: a listening module configured to perform a survey of the uplink interference received at the booster base station; a storage module configured to store uplink scheduling information including information indicating uplink transmission resources granted to user equipments served by the coverage cell; a calculation module configured to calculate an adjusted uplink interference by subtracting from the survey of uplink interference a contribution made to the survey of uplink interference by user equipments which, based on the uplink scheduling information, are not served by the coverage cell; and a switching module configured to switch the booster cell from functioning in the second mode to functioning in the first mode in dependence upon whether the adjusted uplink interference meets a switching criterion.
    • 本发明的实施例提供一种基站,被配置为在无线通信系统中操作,作为提供小区的提升基站,该小区可操作为向其至少部分重叠的覆盖小区提供额外容量的升压小区,所述升压小区为 可操作以在第一模式和第二模式下工作,其中当所述第一模式工作时,所述升压单元向所述覆盖单元提供比在所述第二模式中工作时更多的附加容量,所述升压基站包括:配置 对升压基站接收的上行链路干扰进行调查; 存储模块,被配置为存储上行链路调度信息,所述上行链路调度信息包括指示由所述覆盖小区服务的用户设备授予的上行链路传输资源的信息; 计算模块,被配置为通过从所述上行链路干扰的调查中减去对由所述上行链路调度信息不由所述覆盖小区服务的用户设备对所述上行链路干扰的测量的贡献来计算调整后的上行链路干扰; 以及切换模块,被配置为根据所调整的上行链路干扰是否满足切换标准,将升压小区从第二模式的功能切换到第一模式中的功能。
    • 36. 发明申请
    • WIRELESS COMMUNICATION WITH CO-OPERATING CELLS
    • 无线通信与合作电话
    • WO2012103946A1
    • 2012-08-09
    • PCT/EP2011/051500
    • 2011-02-02
    • FUJITSU LIMITEDMOULSLEY, TimothyLI, ZhaojunBUCKNELL, PaulZHU, Chenxi
    • MOULSLEY, TimothyLI, ZhaojunBUCKNELL, PaulZHU, Chenxi
    • H04B7/02
    • H04W72/042H04B7/024
    • In an LTE-based wireless communication system, each channel such as a control channel PDCCH is transmitted to the UE from one serving cell (the primary cell or Pcell). At the cell border the Pcell suffers from increased interference from neighbouring cells and typically a lower effective transmission rate is used to increase robustness to interference, for both data and control channel. Also, neighbouring cells are typically given different cell IDs, which can be used as a basis for distinguishing transmissions from different cells, even if radio frames are time-aligned. The invention modifies the control channel operation by arranging a common mapping of transmitted symbols to control channel resources in two different cells so that the same control channel message (P) or part of the message can be transmitted jointly from the two cells ((a),(b)), avoiding resources used in the cells for respective reference signals (R). This can be used to improve control channel reception at the cell border, without using more control channel resources. This would be beneficial in both normal system operation and also for Co-operative Multi-Point (CoMP) operation, e.g. using joint transmission techniques for data.
    • 在基于LTE的无线通信系统中,诸如控制信道PDCCH的每个信道从一个服务小区(主小区或Pcell)被发送到UE。 在小区边界,Pcell遭受来自相邻小区的增加的干扰,并且通常使用较低的有效传输速率来增加数据和控制信道对干扰的鲁棒性。 此外,相邻小区通常被给予不同的小区ID,其可以用作区分来自不同小区的传输的基础,即使无线电帧是时间对准的。 本发明通过将传输符号的公共映射布置在两个不同的小区中的控制信道资源上来修改控制信道操作,使得相同的控制信道消息(P)或消息的一部分可以从两个小区((a) ,(b)),避免在各个参考信号(R)的单元中使用的资源。 这可以用于改善小区边界处的控制信道接收,而不需要更多的控制信道资源。 这在正常的系统操作以及合作多点(CoMP)操作中都是有益的。 使用联合传输技术进行数据传输。
    • 39. 发明申请
    • A METHOD IN A TERMINAL, TERMINAL, BASE STATION, AND WIRELESS COMMUNICATION SYSTEM
    • WO2020259882A1
    • 2020-12-30
    • PCT/EP2020/058514
    • 2020-03-26
    • FUJITSU LIMITEDBUCKNELL, PaulMOULSLEY, Timothy
    • BUCKNELL, PaulMOULSLEY, Timothy
    • H04W48/18H04W88/06
    • A procedure for inter-RAT cell selection by allowing a terminal such as an loT device, under longer term network control, to access a cell on another RAT. A multi-RAT cellular communication system comprises a first base station (20) providing a first cell (30) using a first RAT (RAT1), and a second base station (40) providing a second cell (50) using a second RAT (RAT2). A terminal (10) camped on the first cell (30) may perform a cell selection/reselection procedure to connect to the second cell (50). This is achieved by the first base station (20) transmitting a trigger condition control message including at least one parameter for deciding whether to trigger the cell selection/reselection procedure. Each such parameter is stored in an internal memory of the terminal (10). At some later time the terminal (10) decides whether to trigger the cell selection/reselection procedure by executing trigger condition checking algorithms, which combine the at least one parameter from the trigger condition control message with at least one property of the terminal not known in the network, such as the current battery level of the terminal. The second base station (40) completes the cell selection/reselection procedure with the terminal (10) and grants a connection to the second cell (50). This reduces the amount of signalling (and therefore terminal power) required for inter-RAT cell selection and re-selection.