知搜-全球专利检索

  1. 登录
  2. 注册

搜索结果

155 条记录 (耗时 0.057 秒)

    E911 overlay solution for GSM, for use in a wireless location system
    3.
    发明授权
    E911 overlay solution for GSM, for use in a wireless location system 有权
    用于GSM的E911覆盖解决方案，适用于无线定位系统

    公开(公告)号：US06996392B2

    公开(公告)日：2006-02-07

    申请号：US10234363

    申请日：2002-09-03

    申请人： Robert J. Anderson ,  Joseph W. Sheehan

    发明人： Robert J. Anderson ,  Joseph W. Sheehan

    IPC分类号： H04M11/04

    CPC分类号： H04W64/00 ,  H04W4/90 ,  H04W24/00 ,  H04W72/0406 ,  H04W74/0833 ,  H04W76/50

    摘要： In a network overlay Location Services solution for a GSM communications network, the LMU monitors the uplink and/or downlink control channels and determines which call originations are for E911 emergencies and which call setup (Stand-alone Dedicated Control Channel, or SDCCH), assigned traffic (TCH) and associated (Slow Associated Control Channel, or SACCH) channels are subsequently assigned. Capturing the energy on the call setup channel, SDCCH, and its associated SACCH will typically provide a sub-100 meter level of accuracy. If not, the SMLC can redirect the LMU to the assigned traffic channel, TCH, to capture additional RF energy and improve the location accuracy as required. This approach takes advantage of the fact that Channel Request messages on the RACH include an information element that indicates the purpose for the access request. One of the values of this information element identifies that the Channel Request is for an emergency call. By monitoring the Access Grant channels (downlink), e.g., the AGCH, the primary (serving) LMU (LMU 200A in FIG. 1) can capture the Immediate Assignment Message (IMM ASS) for emergency calls. The Immediate Assignment Message contains the Channel Request message (with the emergency call indication) and the SDCCH channel to be used by the MS for subsequent call setup messaging. The primary LMU will forward the Immediate Assignment Message to the SMLC, which will task the cooperating LMUs to collect the RF energy from the associated SDCCH, SACCH and TCH channels and provide TDOA, AoA, and FDOA determinations.

    摘要翻译： 在用于GSM通信网络的网络覆盖定位服务解决方案中，LMU监视上行链路和/或下行链路控制信道，并确定哪些呼叫发起用于E911紧急情况以及哪个呼叫建立（独立专用控制信道或SDCCH）被分配 随后分配业务（TCH）和相关联的（慢关联控制信道或SACCH）信道。 在呼叫建立信道，SDCCH及其相关联的SACCH上捕获能量通常将提供低于100米的准确度级别。 如果不是，SMLC可以将LMU重定向到分配的业务信道TCH，以捕获额外的RF能量并根据需要提高定位精度。 这种方法利用了RACH上的信道请求消息包括指示访问请求的目的的信息元素的事实。 该信息元素的值之一识别信道请求是用于紧急呼叫。 通过监视例如AGCH的接入授权信道（下行链路），主（服务）LMU（图1中的LMU200A）可以捕获用于紧急呼叫的立即分配消息（IMM ASS）。 立即分配消息包含MS要用于随后的呼叫建立消息传递的信道请求消息（具有紧急呼叫指示）和SDCCH信道。 主LMU将向SMLC转发立即分配消息，SMLC将协调的LMU从相关的SDCCH，SACCH和TCH信道中收集RF能量，并提供TDOA，AoA和FDOA确定。

    Signal collection system for a wireless location system
    6.
    发明授权
    Signal collection system for a wireless location system 有权
    用于无线定位系统的信号采集系统

    公开(公告)号：US06388618B1

    公开(公告)日：2002-05-14

    申请号：US09539370

    申请日：2000-03-31

    申请人： Louis A. Stilp ,  Joseph W. Sheehan ,  Jeffrey F. Bull ,  Robert J. Anderson

    发明人： Louis A. Stilp ,  Joseph W. Sheehan ,  Jeffrey F. Bull ,  Robert J. Anderson

    IPC分类号： G01S302

    CPC分类号： H04W64/00 ,  G01S1/026 ,  G01S5/02 ,  G01S5/021 ,  G01S5/06 ,  G01S2205/008 ,  H04W4/90 ,  H04W76/50 ,  Y02D70/164

    摘要： A signal collection system (SCS) is used in a wireless location system that determines the geographical locations of mobile wireless transmitters. The SCS includes a first receiver module, a first digital signal processing (DSP) module, a control and communications module, a timing signal generator including an enhanced GPS receiver, and a bus coupling the DSP module to the communications and control module. The receiver module receives RF signals from the mobile transmitters via a plurality of antennas and digitizes said RF signals, and provides digitized RF data to the first DSP module.

    摘要翻译： 在确定移动无线发射机的地理位置的无线定位系统中使用信号采集系统（SCS）。 SCS包括第一接收器模块，第一数字信号处理（DSP）模块，控制和通信模块，包括增强型GPS接收器的定时信号发生器和将DSP模块耦合到通信和控制模块的总线。 接收机模块经由多个天线从移动发射机接收RF信号，并对所述RF信号进行数字化，并向第一DSP模块提供数字化的RF数据。

    Modified transmission method for improving accuracy for e-911 calls
    7.
    发明授权
    Modified transmission method for improving accuracy for e-911 calls 有权
    用于提高e-911呼叫精度的改进传输方法

    公开(公告)号：US06334059B1

    公开(公告)日：2001-12-25

    申请号：US09541888

    申请日：2000-03-31

    申请人： Louis A. Stilp ,  Robert J. Anderson ,  Joseph W. Sheehan

    发明人： Louis A. Stilp ,  Robert J. Anderson ,  Joseph W. Sheehan

    IPC分类号： H04Q700

    CPC分类号： H04W64/00 ,  G01S1/026 ,  G01S5/02 ,  G01S5/021 ,  G01S5/06 ,  G01S2205/006 ,  G01S2205/008 ,  H04W4/90 ,  H04W76/50

    摘要： The accuracy of the location estimate of a Wireless Location System is dependent, in part, upon both the transmitted power of the wireless transmitter and the length in time of the transmission from the wireless transmitter. In general, higher power transmissions and transmissions of greater transmission length can be located with better accuracy by the Wireless Location System than lower power and shorter transmissions. Wireless communications systems generally limit the transmit power and transmission length of wireless transmitters in order to minimize interference within the communications system and to maximize the potential capacity of the system. The inventive method disclosed herein meets the conflicting needs of both systems by enabling the wireless communications system to minimize transmit power and length while enabling improved location accuracy for certain types of calls, such as wireless 9-1-1 calls. The method comprises the following steps: a wireless transmitter receives normal transmission parameters from a base station; the user of the wireless transmitter initiates a call on the wireless transmitter by dialing a sequence of digits and pressing “SEND” or “YES”; a processor within the wireless transmitter compares the dialed sequence of digits with one or more trigger events stored within the wireless transmitter; if the dialed sequence of digits does not match the trigger event, then the wireless transmitter uses the normal transmission parameters in making the call; and if the dialed sequence of digits matches the trigger event, then the wireless transmitter uses a modified transmission sequence.

    摘要翻译： 无线定位系统的位置估计的精度部分地取决于无线发射机的发射功率和从无线发射机发射的时间长度。 通常，通过无线定位系统可以以比较低的功率和较短的传输更高的精度来定位更高功率的传输和更大传输长度的传输。 无线通信系统通常限制无线发射机的发射功率和传输长度，以便最小化通信系统内的干扰并最大化系统的潜在容量。 本文公开的创造性方法通过使无线通信系统能够最小化发射功率和长度同时实现诸如无线9-1-1呼叫的某些类型的呼叫的改进的位置精度来满足两个系统的冲突的需求。 该方法包括以下步骤：无线发射机从基站接收正常的传输参数; 无线发射机的用户通过拨打一系列数字并按“发送”或“是”来在无线发射机上发起呼叫。 无线发射机内的处理器将拨号的数字序列与存储在无线发射机内的一个或多个触发事件进行比较; 如果拨打的数字序列与触发事件不匹配，则无线发射机在进行呼叫时使用正常的传输参数; 并且如果拨号的数字序列匹配触发事件，则无线发射机使用修改的传输序列。

    Architecture for a signal collection system of a wireless location system
    8.
    发明授权
    Architecture for a signal collection system of a wireless location system 有权
    无线定位系统信号采集系统的架构

    公开(公告)号：US06266013B1

    公开(公告)日：2001-07-24

    申请号：US09228362

    申请日：1999-01-11

    申请人： Louis A. Stilp ,  Joseph W. Sheehan ,  Tim J. Harris ,  Jeffrey F. Bull ,  Robert J. Anderson

    发明人： Louis A. Stilp ,  Joseph W. Sheehan ,  Tim J. Harris ,  Jeffrey F. Bull ,  Robert J. Anderson

    IPC分类号： G01S124

    CPC分类号： H04W64/00 ,  G01S1/026 ,  G01S5/02 ,  G01S5/021 ,  G01S5/0215 ,  G01S5/0221 ,  G01S5/0252 ,  G01S5/0268 ,  G01S5/0284 ,  G01S5/06 ,  G01S2205/006 ,  G01S2205/008 ,  H04W4/90 ,  H04W76/50 ,  Y02D70/1222 ,  Y02D70/1224 ,  Y02D70/1242 ,  Y02D70/144 ,  Y02D70/164

    摘要： A signal collection system (SCS) for use in a Wireless Location System is disclosed. The SCS performs wideband energy detection and reporting at the front end of the SCS receiver. Other aspects of the SCS include a protocol for efficiently setting levels for wideband energy detection, DSP sharing within an SCS, and recursive location processing using progressively greater bandwidth from temporarily stored wideband data. The disclosed SCS includes antennas, a wideband receiver, a DSP for wideband energy detection, a memory for temporarily storing digital samples of received signals, a digital drop receiver, demodulation and normalization processors, and a communications processor. The wideband energy detection and the demodulation and normalization processors are implemented with DSP's that detect energy in a particular band, demodulate selected signals, and extract signals of interest for forwarding. The wideband energy detection unit determines the presence of a transmitted signal in the control channels monitored by the SCS. The wideband energy detection involves forming a map of the channel spectrum, and the map is used to determine when to demodulate signals within selected channels.

    摘要翻译： 公开了一种用于无线定位系统的信号采集系统（SCS）。 SCS在SCS接收机的前端执行宽带能量检测和报告。 SCS的其他方面包括用于有效地设置宽带能量检测的水平，SCS内的DSP共享以及使用从临时存储的宽带数据逐渐增加的带宽的递归位置处理的协议。 所公开的SCS包括天线，宽带接收机，用于宽带能量检测的DSP，用于临时存储接收信号的数字样本的存储器，数字丢弃接收机，解调和归一化处理器以及通信处理器。 宽带能量检测和解调和归一化处理器是用DSP来实现的，该DSP用于检测特定频带中的能量，解调所选择的信号，并提取用于转发的信号。 宽带能量检测单元确定由SCS监控的控制信道中的发射信号的存在。 宽带能量检测涉及形成信道频谱的映射，并且该映射用于确定何时解调选定信道内的信号。