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    • 4. 发明申请
    • LOAD MANAGEMENT FOR A MOBILITY MANAGEMENT ENTITY OF A CELLULAR COMUNICATION SYSTEM
    • 蜂窝通信系统的移动性管理实体的负载管理
    • US20090318161A1
    • 2009-12-24
    • US12469759
    • 2009-05-21
    • Luis Lopes
    • Luis Lopes
    • H04W72/00
    • H04W28/08H04W92/12
    • A cellular communication system comprises a Mobile Management Entity, MME, 117 and a load characteristic processor 203 that determines an MME load characteristic for base stations 101-107 in response to a measured operating characteristic thereof. A selection processor 207 selects a subset of base stations in response to the MME load characteristics, and a load monitor 205 determines an MME load level measure. A transmit controller 209 transmits a load reduction indication for the MME to the subset of base stations in response to the MME load level measure meeting a criterion. The base stations receiving the load reduction indication bias their operation towards a reduced load level of the MME.
    • 蜂窝通信系统包括移动管理实体MME,117和负载特性处理器203,负载特性处理器203响应于其测量的工作特性来确定基站101-107的MME负载特性。 选择处理器207响应于MME负载特性来选择基站的子集,并且负载监视器205确定MME负载水平测量。 发送控制器209响应于满足标准的MME负载水平度量,向MME向基站的子集发送负载减少指示。 接收到负载减少指示的基站将其操作偏向于降低MME的负载水平。
    • 6. 发明授权
    • Method of and system for estimating a time of arrival of a radio signal
    • 用于估计无线电信号的到达时间的方法和系统
    • US06675018B2
    • 2004-01-06
    • US09468998
    • 1999-12-21
    • Eric VillierLuis LopesBrendan Ludden
    • Eric VillierLuis LopesBrendan Ludden
    • H04Q720
    • H04W64/00G01S5/0215G01S5/0221G01S5/14
    • The invention relates to a method for estimating time of arrival of radio signals in particular as used for location determination. A known method of determining the location of a subscriber unit (401) calculates a number of ranges based on the distance from base stations (403,405,407) with known location. The ranges are calculated from time of arrival estimates of the signals from the different base stations but a significant source of error is the multipath signal components typical in for example cellular mobile communication systems. According to the invention, the effect of multipath is mitigated by selecting a subset of signals based on a time of arrival estimate of each of the signals. An averaged time of arrival estimate with improved accuracy is then determined from the selected subset. A typical use of the invention is for location determination in a cellular mobile communication system.
    • 本发明涉及一种用于估计无线电信号的到达时间的方法,特别是用于位置确定。 确定用户单元(401)的位置的已知方法基于与具有已知位置的基站(403,405,407)的距离来计算范围的数量。 范围是根据来自不同基站的信号的到达时间估计计算的,但是重要的误差源是例如蜂窝移动通信系统中典型的多径信号分量。 根据本发明,通过基于每个信号的到达时间估计选择信号子集来减轻多路径的影响。 然后从所选择的子集确定具有改进的准确度的平均到达时间估计。 本发明的典型用途是用于蜂窝移动通信系统中的位置确定。
    • 7. 发明授权
    • Antenna array system
    • 天线阵列系统
    • US06453176B1
    • 2002-09-17
    • US09468626
    • 1999-12-21
    • Luis LopesEric VillierStephen Basil AftelakRay Owen
    • Luis LopesEric VillierStephen Basil AftelakRay Owen
    • H04B138
    • H01Q25/00H01Q1/246H01Q3/26H04B7/086
    • This invention relates to an antenna array system. A problem with antenna array systems is that they provide rather inefficient use of hardware and have inflexible resource allocation. The invention provides a flexible antenna array system architecture, which has very flexible allocation of transceiver elements to beams. The invention comprise switching means (407) which associate transceiver elements (405) to beam ports of a beam former (403) connected to a antenna array (401). The association of transceiver elements (405) to beam ports are rearranged regularly, typically for each time slot, and the association is optimized for overall performance for all subscriber units. The invention is applicable for example to cellular communication systems such as GSM.
    • 本发明涉及一种天线阵列系统。 天线阵列系统的一个问题是它们提供了低效的硬件使用,并且具有不灵活的资源分配。 本发明提供了一种灵活的天线阵列系统架构,其具有非常灵活地将收发机元件分配给波束。 本发明包括将收发器元件(405)与连接到天线阵列(401)的波束形成器(403)的波束端口相关联的切换装置(407)。 收发器元件(405)与波束端口的关联通常针对每个时隙进行规则重新布置,并且针对所有用户单元的整体性能优化关联。 本发明可应用于诸如GSM之类的蜂窝通信系统。
    • 8. 发明申请
    • RESTRICTED ACCESS IN CELLULAR COMMUNICATION SYSTEMS
    • 细节通信系统中的限制访问
    • US20110105133A1
    • 2011-05-05
    • US12613108
    • 2009-11-05
    • Gerard T. FosterStephen J. BarrettLuis Lopes
    • Gerard T. FosterStephen J. BarrettLuis Lopes
    • H04W72/04
    • H04W48/12H04W84/045
    • A cellular communication system comprises a base station which can to operate in a restricted mode wherein support is restricted to user equipments of a first associated set of user equipments, such as a Closed Subscriber Group. The base station comprises a profile unit which determines a first transmit power profile where the first transmit power profile is indicative of the base station operating in the restricted mode. The base station further comprises a transmitter for transmitting at least one common channel, such as a pilot signal or a broadcast signal, with a transmit power according to the first transmit power profile. User Equipments may measure the power profile to evaluate whether the base station employs restricted access. The invention may in particular reduce the number of access attempts to restricted base stations by non-eligible User Equipments.
    • 蜂窝通信系统包括基站,其能够以限制模式操作,其中支持仅限于第一相关联的一组用户设备的用户设备,诸如封闭用户组。 基站包括简档单元,其确定第一发射功率分布,其中第一发射功率分布指示基站以受限模式操作。 基站还包括发射机,用于根据第一发射功率分布,发送具有发射功率的诸如导频信号或广播信号的至少一个公共信道。 用户设备可以测量功率分布,以评估基站是否采用受限访问。 本发明可以特别地减少非合格用户设备对受限基站的接入尝试次数。