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公开(公告)号：US5802105A
公开(公告)日：1998-09-01
申请号：US347526
申请日：1994-11-30
IPC分类号： H04L1/00 , H04B3/46 , H04B7/26 , H04B17/00 , H04L1/20 , H04L1/24 , H04L27/00 , H04L29/08 , H04L29/14
CPC分类号： H04L1/20 , H04L1/241 , H04L1/242 , H04L2027/0034
摘要： A system and method for testing signal transmission quality within a digital communication system is disclosed herein. The system may be incorporated within a digital cellular communication system in which information is exchanged over spread spectrum communication channels, among a plurality of mobile users, via at least one cell-site. The system contemplates testing a digital communication channel by transmitting a test sequence of digital data over the communication channel. The test sequence of digital data transmitted over the communication channel is received at a receiving station, within which is also generated a replica of the test sequence of digital data. The accuracy of transmission over the communication channel is then determined by comparing the replica of the test sequence of digital data to the test sequence of data received over the communication channel. The system allows the test sequence of digital data to be transmitted at one of a set of known data rates, with the receive station being disposed to identify the data rate associated with each test sequence of digital data. In a preferred implementation transmission of the test sequence involves generating a first plurality of data packets, which collectively comprise the test sequence of digital data. Each data packet is assigned one of a multiplicity of data rates in accordance with a first pseudorandom process, and is then transmitted at the data rate assigned thereto.
摘要翻译： 本文公开了一种用于测试数字通信系统内的信号传输质量的系统和方法。 该系统可以并入到数字蜂窝通信系统中，其中通过至少一个小区站点在多个移动用户之间通过扩频通信信道交换信息。 该系统考虑通过在通信信道上发送数字数据的测试序列来测试数字通信信道。 通过通信信道发送的数字数据的测试序列在接收站处被接收，在接收站中也产生数字数据的测试序列的副本。 然后通过将数字数据的测试序列的副本与通过通信信道接收的数据的测试序列进行比较来确定通信信道上的传输的准确性。 该系统允许数字数据的测试序列以一组已知数据速率中的一种传输，其中接收站被设置为识别与数字数据的每个测试序列相关联的数据速率。 在优选实施例中，测试序列的传输涉及生成第一多个数据分组，其共同地包括数字数据的测试序列。 每个数据分组根据第一伪随机过程分配多个数据速率中的一个，然后以分配给它的数据速率发送。
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公开(公告)号：US5680395A
公开(公告)日：1997-10-21
申请号：US515501
申请日：1995-08-15
CPC分类号： H04W36/0066 , H04W48/12
摘要： A method and apparatus for providing a reliable means to perform handoff from a code division multiple access (CDMA) system using a pilot signal to an alternative access technique system. Simple pilot box circuitry is added to a set of border base stations. The border base stations are base stations which operate only in the alternative access technique and which have coverage areas which are contiguous with coverage areas of CDMA operation base stations. The mobile unit monitors for the pilot signal from the border base stations in the same manner as it monitors for pilot signals from the CDMA operation base stations. When the mobile unit detects the pilot signal corresponding to a border base station, it notifies a system controller in accordance with standard operation. The system controller is aware that the pilot signal corresponds to a border base station and thus triggers a hard handoff process to the alternative access technique system in response thereto. The border base stations use a time division duplex technique to monitor a pilot and synchronization sequence from a neighboring one of the CDMA operation base stations to obtain an estimate of absolute system time.
摘要翻译： 一种用于提供从使用导频信号到替代接入技术系统的码分多址（CDMA）系统执行切换的可靠装置的方法和装置。 简单的导频箱电路被添加到一组边界基站。 边界基站是仅在替代接入技术中工作的基站，其具有与CDMA操作基站的覆盖区域相邻的覆盖区域。 移动单元以与监视来自CDMA操作基站的导频信号相同的方式监视来自边界基站的导频信号。 当移动单元检测到与边界基站相对应的导频信号时，它根据标准操作通知系统控制器。 系统控制器知道导频信号对应于边界基站，并因此触发对另一种接入技术系统的硬切换过程。 边界基站使用时分双工技术来监视来自相邻的CDMA操作基站的导频和同步序列，以获得绝对系统时间的估计。
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3.发明授权Method and apparatus for providing mobile unit assisted hard handoff from a CDMA communication system to an alternative access communication system 失效提供从CDMA通信系统到替代的接入通信系统的移动单元辅助硬切换的方法和装置
公开(公告)号：US5594718A
公开(公告)日：1997-01-14
申请号：US413306
申请日：1995-03-30
CPC分类号： H04W36/0066 , H04W48/12
摘要： A method and system for providing a reliable means to perform handoff from a code division multiple access (CDMA) system using a pilot signal to an alternative access communication technique system. Simple pilot box circuitry is added to a set of border base stations. The border base stations are base stations which operate only in the alternative access communication technique and which have coverage areas which are contiguous with coverage areas of CDMA operation base stations. The mobile unit monitors for the pilot signal from the border base stations in the same manner as it monitors for pilot signals from the CDMA operation base stations. When the mobile unit detects the pilot signal corresponding to a border base station, it notifies a system controller in accordance with standard operation. The system controller is aware that the pilot signal corresponds to a border base station and thus triggers a hard handoff process to the alternative access communication technique system in response thereto.
摘要翻译： 一种用于提供从使用导频信号的码分多址（CDMA）系统到替代的接入通信技术系统执行切换的可靠装置的方法和系统。 简单的导频箱电路被添加到一组边界基站。 边界基站是仅在替代接入通信技术中工作的基站，其具有与CDMA操作基站的覆盖区域相邻的覆盖区域。 移动单元以与监视来自CDMA操作基站的导频信号相同的方式监视来自边界基站的导频信号。 当移动单元检测到与边界基站相对应的导频信号时，它根据标准操作通知系统控制器。 系统控制器知道导频信号对应于边界基站，从而触发对其进行的替代接入通信技术系统的硬切换过程。
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4.发明授权Decoding with partial state information on a convolutionally encoded channel 失效在卷积编码的信道上对部分状态信息进行解码公开(公告)号：US06205186B1
公开(公告)日：2001-03-20
申请号：US08922720
申请日：1997-09-03
IPC分类号： H04L100
CPC分类号： H04L1/0071 , H03M13/3961 , H03M13/3988 , H03M13/41 , H03M13/4107 , H03M13/6325 , H03M13/6508 , H03M13/6583 , H04L1/0054
摘要： The certainties of transmitted bits at predetermined locations in time are determine a priori. This information is then used to set the states of a Viterbi decoder to different state metrics in accordance with the certainties of the transmitted bits. High certainty of a transmitted bit results in resetting the states corresponding to that bit to a high state metric. In contrast, low certainty of a transmitted bit results in resetting the states corresponding to that bit to a low state metric. Resetting the states to different state metrics improves the decoding performance and shortens the time required to converge the decoding trellis by eliminating improbable paths.
摘要翻译： 在预定的时间点的传输比特的确定性是先验确定的。 然后，该信息用于根据发送的比特的确定性将维特比解码器的状态设置为不同的状态度量。 发送位的高确定性导致将与该位相对应的状态重置为高状态度量。 相比之下，传输位的低确定性导致将与该位相对应的状态重置为低状态度量。 将状态重置为不同的状态度量可以提高解码性能，并通过消除不可能的路径缩短融合解码网格所需的时间。
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5.发明授权Decoding with partial state information on a convolutionally encoded channel 有权在卷积编码的信道上对部分状态信息进行解码公开(公告)号：US06519297B2
公开(公告)日：2003-02-11
申请号：US09741969
申请日：2000-12-20
IPC分类号： H04L2706
CPC分类号： H04L1/0071 , H03M13/3961 , H03M13/3988 , H03M13/41 , H03M13/4107 , H03M13/6325 , H03M13/6508 , H03M13/6583 , H04L1/0054
摘要： The certainties of transmitted bits at predetermined locations in time are determined a priori. This information is then used to set the states of a Viterbi decoder to different state metrics in accordance with the certainties of the transmitted bits. High certainty of a transmitted bit results in resetting the states corresponding to that bit to a high state metric. In contrast, low certainty of a transmitted bit results in resetting the states corresponding to that bit to a low state metric. Resetting the states to different state metrics improves the decoding performance and shortens the time required to converge the decoding trellis by eliminating improbable paths.
摘要翻译： 先前确定预定位置处的发送位的确定性。 然后，该信息用于根据发送的比特的确定性将维特比解码器的状态设置为不同的状态度量。 发送位的高确定性导致将与该位相对应的状态重置为高状态度量。 相比之下，传输位的低确定性导致将与该位相对应的状态重置为低状态度量。 将状态重置为不同的状态度量可以提高解码性能，并通过消除不可能的路径缩短融合解码网格所需的时间。
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公开(公告)号：US6101173A
公开(公告)日：2000-08-08
申请号：US039985
申请日：1998-03-16
申请人： Gwain Bayley
发明人： Gwain Bayley
CPC分类号： H04W52/0229 , H04B1/70756 , H04B2201/70701 , H04B2201/70707
摘要： A method and circuit for adaptively determining a pilot signal reacquisition time. A searcher subsystem measures a phase of the pilot signal. A control processor measures a magnitude of a shift in the pilot signal phase, compares the measured magnitude to a shift threshold, and decreases the reacquisition time if the measured magnitude is not greater than the shift threshold. The control processor also may compare the reacquisition time to a minimum reacquisition time, and decrease the reacquisition time only if the reacquisition time is greater than the minimum reacquisition time. Additionally, the control processor may increase the reacquisition time to a maximum reacquisition time if the measured magnitude is greater than said shift threshold.
摘要翻译： 一种用于自适应地确定导频信号重新捕获时间的方法和电路。 搜索器子系统测量导频信号的相位。 控制处理器测量导频信号相位中的移位幅度，将测量的幅度与移位阈值进行比较，如果测得的幅度不大于移位阈值，则减小重新获取时间。 控制处理器还可以将重新捕获时间与最小重新捕获时间进行比较，并且仅在重新捕获时间大于最小重新捕获时间时才减少重新捕获时间。 此外，如果测量的幅度大于所述移位阈值，则控制处理器可将再获取时间增加到最大重新捕获时间。
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公开(公告)号：US06553223B1
公开(公告)日：2003-04-22
申请号：US09475335
申请日：1999-12-30
IPC分类号： H04M300
CPC分类号： G06F13/102
摘要： The virtual device architecture provides physical and logical device drivers for interfacing software programs executing on a microprocessor of the mobile telephone of a wireless communication system with any of a wide variety of hardware devices connectable within the mobile telephone. The logical device drivers convert commands received from the software applications to commands appropriate for use by selected hardware devices. The physical device drivers receive the converted commands from the logical device drivers and in response to the received commands directly control the selected hardware devices. In one example described herein, the logical device drivers provide translation of core commands necessary to control the selected hardware devices and extended commands for enhanced control of the hardware devices. The logical device drivers operate to convert the extended commands into core commands prior to forwarding the commands to the physical device drivers. By providing logical and physical drivers for use with peripheral devices, the need to provide different versions of software executing on the microprocessor to accommodate different types of peripheral devices is substantially eliminated resulting in a considerable reduction in time and cost associated with developing, maintaining and upgrading software. By providing logical device drivers capable of accommodating both core commands and extended commands, a rich set of peripheral commands can be accommodated thereby further reducing or eliminating the need to provide different versions of software executing on the processor, while nevertheless exploiting the full capabilities of a wide variety of peripheral devices, including state of the art hardware devices such as bit-mapped displays, pointer devices and the like. Method and apparatus embodiments are described.
摘要翻译： 虚拟设备架构提供物理和逻辑设备驱动器，用于将在无线通信系统的移动电话的微处理器上执行的软件程序与在移动电话内可连接的各种各样的硬件设备中的任何一个进行接口。 逻辑设备驱动程序将从软件应用程序接收的命令转换为适合所选硬件设备使用的命令。 物理设备驱动程序从逻辑设备驱动程序接收转换的命令，并响应于所接收的命令直接控制所选择的硬件设备。 在本文描述的一个示例中，逻辑设备驱动程序提供控制所选硬件设备所需的核心命令的转换和用于增强硬件设备控制的扩展命令。 在将命令转发到物理设备驱动程序之前，逻辑设备驱动程序用于将扩展命令转换为核心命令。 通过提供与外围设备一起使用的逻辑和物理驱动程序，基本上消除了在微处理器上执行不同版本的软件以适应不同类型的外围设备的需求，从而大大减少与开发，维护和升级相关的时间和成本 软件。 通过提供能够兼容核心命令和扩展命令的逻辑设备驱动器，可以容纳丰富的外设命令集，从而进一步减少或消除在处理器上执行的软件的不同版本的需要，同时利用一个 各种外围设备，包括诸如位映射显示器，指针设备等的现有技术的硬件设备。 描述了方法和设备实施例。
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公开(公告)号：US5748104A
公开(公告)日：1998-05-05
申请号：US682819
申请日：1996-07-11
CPC分类号： G08C17/02 , H04Q9/00 , H04Q2209/50 , H04Q2209/60
摘要： A wireless remote telemetry system which uses low-cost remote communication devices operating on existing wireless communication systems in order to provide real-time reading and control of remote devices. In an embodiment applicable to utility service, consumption of electrical power among a population of customers is measured by a utility metering system having a wireless communication capability. The metering system comprises a remote metering unit which communicates with a central controller over existing wireless communication systems, such as cellular base stations, using existing communication standards. The remote metering unit transmits various messages over a shared random access channel to a central controller. The central controller transmits messages to the remote metering unit over a paging channel. The remote metering unit may operate in a half-duplex mode only. Furthermore, the remote metering unit may provide a gateway to advanced consumer services at the remote location.
摘要翻译： 一种无线远程遥测系统，其使用在现有无线通信系统上操作的低成本远程通信设备，以便提供远程设备的实时读取和控制。 在适用于公共事业服务的实施例中，通过具有无线通信能力的公用事业计量系统来测量一组客户的电力消耗。 计量系统包括远程计量单元，其使用现有的通信标准，通过现有的无线通信系统（例如蜂窝基站）与中央控制器进行通信。 远程计量单元通过共享随机接入信道向中央控制器发送各种消息。 中央控制器通过寻呼信道向远程计量单元发送消息。 远程计量单元只能以半双工模式运行。 此外，远程计量单元可以向远程位置处的高级消费者服务提供网关。
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公开(公告)号：US5590406A
公开(公告)日：1996-12-31
申请号：US426763
申请日：1995-04-21
CPC分类号： H04W76/025 , H04W76/064
摘要： A method of invoking and canceling voice and data service between a mobile unit and a base station. Using a standard telephone system, the connection for a voice service and a data service is the same. With the introduction of the digital wireless link, the voice connection and the data connection are different. Therefore new dialing commands which indicate the intent of the connection are created. These commands can also be used to designate the intent of the call from a mobile unit capable of data and voice service but not capable of simultaneous voice and data service. They can also be used to invoke simultaneous voice and data services.
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10.发明授权Prioritization of searching by a remote unit in a wireless communication system 有权在无线通信系统中由远程单元进行搜索的优先级公开(公告)号：US06944143B1
公开(公告)日：2005-09-13
申请号：US09540802
申请日：2000-03-31
申请人： Gwain Bayley , Robbin Hughes , Messay Amerga
发明人： Gwain Bayley , Robbin Hughes , Messay Amerga
CPC分类号： H04W48/20
摘要： A method and apparatus for improving searching in a remote unit of a slotted mode, wireless, communication system. In a slotted mode communication system, the remote unit enters an “active state” during its assigned slot. While in the active state, a controller in the remote unit passes selected sets of search parameters to a search engine. The order that the searches are performed is based on the measured signal strength and the age of the measurement. The search engine performs searches using the selected sets of search parameters. Searching continues as long as the remote unit is in the active state. When the remote unit enters the inactive state, searching ceases. While in the inactive state, the controller evaluates the results of the searches performed during the previous active state. During the next active state, the next sequence of searching is performed based on measured signal strength and the measurement age corresponding to the measurements made during the previous active state.
摘要翻译： 一种用于改进在时隙模式，无线，通信系统的远程单元中的搜索的方法和装置。 在时隙模式通信系统中，远程单元在其分配的时隙期间进入“活动状态”。 在处于活动状态时，远程单元中的控制器将所选择的一组搜索参数传递给搜索引擎。 执行搜索的顺序是基于测量的信号强度和测量的年龄。 搜索引擎使用所选择的搜索参数集执行搜索。 只要远程单元处于活动状态，搜索继续。 当远程单元进入非活动状态时，搜索停止。 在处于非活动状态时，控制器评估在先前活动状态期间执行的搜索结果。 在下一活动状态期间，基于测量信号强度和对应于在先前活动状态期间进行的测量的测量年龄来执行下一个搜索序列。
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