公开(公告)号：US06330450B1

公开(公告)日：2001-12-11

申请号：US09236249

申请日：1999-01-25

申请人： Kenneth Wallstedt ,  Torbjorn Ward

发明人： Kenneth Wallstedt ,  Torbjorn Ward

IPC分类号： H04Q720

CPC分类号： H04B17/318 ,  H04B17/21 ,  H04W36/30 ,  H04W72/08

摘要： A system and method for minimizing effects of both internal and external transmitter noise in order to improve control decisions that are based on signal strength measurements. A wireless network includes an internal transmitter transmitting a first signal at a first frequency and noise at other frequencies in a known pattern. The signal strength of the first signal is measured by the receiver at the first frequency. The noise of the transmitter of the first signal is calculated on other frequencies, using the first transmitter's known noise pattern. A determination is then made whether the noise of the first signal is above a threshold on one or more of the other frequencies used by the wireless communication system. If the noise is above the threshold, corrective action is taken. The wireless network further includes one or more receivers that measure signal strengths on the range of frequencies used by the system. A correlation is made between the known spectral pattern of transmitters external to the system and the signal strength measurements. If the correlation is above a threshold, then external noise is present and corrective action is taken.

摘要翻译： 一种用于最小化内部和外部发射机噪声影响的系统和方法，以便改进基于信号强度测量的控制决策。 无线网络包括以已知模式发送第一频率的第一信号和其它频率的噪声的内部发射机。 第一个信号的信号强度由接收机以第一个频率测量。 使用第一发射机的已知噪声模式，在其它频率上计算第一信号的发射机的噪声。 然后，确定第一信号的噪声是否在无线通信系统使用的一个或多个其它频率上高于阈值。 如果噪声超过阈值，则采取纠正措施。 无线网络还包括测量系统使用的频率范围上的信号强度的一个或多个接收机。 在系统外部的发射器的频谱模式与信号强度测量之间进行相关。 如果相关性高于阈值，则存在外部噪声并采取纠正措施。

公开(公告)号：US5701294A

公开(公告)日：1997-12-23

申请号：US537457

申请日：1995-10-02

申请人： Torbjorn Ward ,  Anders Sandell

发明人： Torbjorn Ward ,  Anders Sandell

IPC分类号： H04L1/00 ,  H04W28/06 ,  H04B7/26

CPC分类号： H04W28/06 ,  H04L1/0003 ,  H04L1/0009 ,  H04L1/0014 ,  H04L1/0015 ,  H04L1/0025 ,  H04W24/00 ,  H04W24/10 ,  H04W28/22 ,  H04W72/0446

摘要： A system and method for dynamically adapting the user bit rate of a time division multiple access (TDMA) cellular telecommunication system to achieve optimum voice quality over a broad range of radio channel conditions are disclosed. The system continuously monitors radio channel quality on both the uplink and the downlink, and dynamically adapts the system's combination of speech coding, channel coding, modulation, and number of assignable time slots per call to optimize voice quality for the measured conditions. Various combinations of the system's speech coding, channel coding, modulation, and assignable time slots are identified as combination types and corresponding cost functions are defined. By identifying and selecting the cost function with the lowest cost for the measured radio channel conditions, the system provides the maximum voice quality achievable within the limits of the system design.

摘要翻译： 公开了一种用于动态地适应时分多址（TDMA）蜂窝电信系统的用户比特率以在广泛的无线电信道条件下实现最佳语音质量的系统和方法。 系统连续监测上行链路和下行链路的无线信道质量，动态调整系统语音编码，信道编码，调制和每个呼叫可分配时隙数量的组合，以优化测量条件下的语音质量。 将系统的语音编码，信道编码，调制和可分配时隙的各种组合识别为组合类型，并定义对应的成本函数。 通过识别和选择测量无线电信道条件成本最低的成本函数，系统提供在系统设计限制范围内可实现的最大语音质量。

公开(公告)号：US5663958A

公开(公告)日：1997-09-02

申请号：US603860

申请日：1996-02-22

申请人： Torbjorn Ward

发明人： Torbjorn Ward

IPC分类号： H04B7/26 ,  H04L1/00 ,  H04B7/212

CPC分类号： H04L1/0018 ,  H04L1/0007

摘要： The time division multiple access (TDMA) frame time synchronization error for received mobile station burst communications transmitted on the reverse digital control channel is monitored by the receiving base station. A probability density function is then prepared by the base station reflecting the number of instances of each determined length of time synchronization error monitored over a predetermined time period. The probability density function is then processed to identify the percentage of burst communications during that predetermined time period that exceed a synchronization error threshold. If the determined percentage exceeds a given percentage, then abbreviated length burst communication operating mode is ordered by the base station for all mobile stations operating within the cell. Otherwise, conventional length burst communication operating mode is ordered by the base station. The measured time synchronization error is continuously processed to effectuate dynamic control over the specified length of mobile station burst communications.

摘要翻译： 在反向数字控制信道上发送的接收到的移动台突发通信的时分多址（TDMA）帧时间同步误差由接收基站监视。 然后由基站准备反映在预定时间段内监测的每个确定的时间同步误差长度的实例的数量的概率密度函数。 然后处理概率密度函数以识别在超过同步误差阈值的该预定时间段期间的突发通信的百分比。 如果所确定的百分比超过给定的百分比，那么缩短的长度突发通信操作模式由基站对于在小区内工作的所有移动台排序。 否则，常规长度突发通信操作模式由基站排序。 测量的时间同步误差被连续处理，以实现对移动台突发通信的指定长度的动态控制。

公开(公告)号：US5542097A

公开(公告)日：1996-07-30

申请号：US394266

申请日：1995-02-22

申请人： Torbjorn Ward ,  Norio Iizuka

发明人： Torbjorn Ward ,  Norio Iizuka

IPC分类号： H04L29/06 ,  H04W12/12 ,  H04W36/08 ,  H04Q7/00

CPC分类号： H04W36/30 ,  H04W88/08

摘要： A digital radiocommunication system and method for providing a consistency check to confirm the identity of a candidate cell for handoff of a digital traffic channel are described. Using relative pathloss comparisons reliance on absolute measurements which can lead to inappropriate handoffs for a variety of reasons. Statistical measurements can also be used to further reduce errors.

摘要翻译： 描述了一种用于提供一致性检查以确认用于数字业务信道的切换的候选小区的身份的数字无线电通信系统和方法。 使用相对路径损耗比较依赖绝对测量，这可能导致不正当的切换由于各种原因。 统计测量也可用于进一步减少误差。

公开(公告)号：US5448762A

公开(公告)日：1995-09-05

申请号：US159956

申请日：1993-12-01

申请人： Torbjorn Ward

发明人： Torbjorn Ward

IPC分类号： H04B1/40 ,  H04B1/50 ,  H04B17/00 ,  H04W72/08

CPC分类号： H04W36/0088 ,  H04W72/04

摘要： In a mobile radio communications station, a communications reception frequency is generated and a time sequence of a plurality of reception monitoring frequencies is separately generated. A reception frequency is switched between the communications reception frequency during a communications reception and a current one of the monitoring reception frequencies during a monitoring reception. More particularly, separate frequency synthesizers are provided for communications reception on the one hand and signal strength monitoring on the other hand. The frequency of the synthesizer for communications reception remains fixed during the course of a communication. The synthesizer for signal strength monitoring need not be as accurate as that for communications reception. Furthermore, since the synthesizer is used only for signal strength monitoring instead of for both communications reception and signal strength monitoring, more time is available for switching between frequencies.

摘要翻译： 在移动无线电通信站中，产生通信接收频率，并且分别产生多个接收监视频率的时间序列。 在通信接收期间的通信接收频率和监视接收期间的监视接收频率中的当前一个之间切换接收频率。 更具体地，提供了单独的频率合成器用于通信接收和另一方面用于信号强度监测。 用于通信接收的合成器的频率在通信过程中保持固定。 用于信号强度监测的合成器不需要像通信接收那样精确。 此外，由于合成器仅用于信号强度监测，而不是用于通信接收和信号强度监测，所以有更多的时间可用于在频率之间切换。

公开(公告)号：US6006092A

公开(公告)日：1999-12-21

申请号：US603858

申请日：1996-02-22

申请人： Torbjorn Ward

发明人： Torbjorn Ward

IPC分类号： H04W36/20 ,  H04W36/30 ,  H04W40/24 ,  H04W72/08 ,  H04Q7/20 ,  H04Q7/34

CPC分类号： H04W36/30 ,  H04W40/248 ,  H04W72/082 ,  H04W36/20

摘要： Each base station in a cellular telephone system includes a signal strength measurement device operable to tune to and make signal strength measurements on not only the voice channels assigned to other cells, but also on its own voice channels. The measurements on the own voice channels provide an indication of injected interference useful in making quality driven voice channel assignments during either call set-up or hand-off. In a conventional analog cellular system, the signal strength measurement device comprises the base station signal strength receiver measuring on own idle base station analog voice frequencies. In a time division multiple access (TDMA) cellular system, the signal strength measurement device comprises the base station location verification module measuring during idle time slots on digital voice frequencies.

摘要翻译： 蜂窝电话系统中的每个基站包括信号强度测量设备，其可操作用于不仅对分配给其他小区的语音信道，而且在其自己的语音信道上进行信号强度测量。 自己的语音信道上的测量提供了在呼叫建立或切换期间对质量驱动的语音信道分配有用的注入干扰的指示。 在传统的模拟蜂窝系统中，信号强度测量设备包括基站信号强度接收机在自己的空闲基站模拟语音频率上测量。 在时分多址（TDMA）蜂窝系统中，信号强度测量装置包括在数字语音频率上的空闲时隙期间测量的基站位置验证模块。

公开(公告)号：US5974320A

公开(公告)日：1999-10-26

申请号：US861270

申请日：1997-05-21

申请人： Torbjorn Ward ,  Anders Sandell ,  Daniel Dufour

发明人： Torbjorn Ward ,  Anders Sandell ,  Daniel Dufour

IPC分类号： H04W16/32 ,  H04W36/08 ,  H04W48/12 ,  H04Q7/00

CPC分类号： H04W36/0061

摘要： A neighborhood zone covering an enclosed or surrounded environment, such as a man-made building or high-rise, is defined within a mobile telecommunications network by associating a plurality of base stations with respective cell areas. A same neighborhood list indicating all measurement channels being utilized within the neighborhood zone by said plurality of base stations is then further defined. The defined same neighborhood list is then transmitted by each of the base stations within its respective coverage area. A mobile station traveling within the neighborhood zone then scans and reports measurements from the indicated measurement channels to the serving mobile telecommunications network. The mobile telecommunications network then effectuates a handover in accordance with the received signal measurements. An idle mobile station further utilizes the measurements to effectuate a cell re-selection.

摘要翻译： 通过将多个基站与相应的小区区域相关联，在移动电信网络内定义了覆盖封闭或周围环境的邻域，例如人造建筑物或高层。 然后进一步限定指示所述多个基站在邻近区域内利用的所有测量信道的相同邻域列表。 然后由其相应覆盖区域内的每个基站发送所定义的相邻邻域列表。 在邻近区域内行进的移动站然后扫描并将测量从指示的测量信道报告给服务移动电信网络。 然后，移动电信网络根据接收的信号测量实现切换。 空闲移动站进一步利用测量来实现小区重选。

公开(公告)号：US5297169A

公开(公告)日：1994-03-22

申请号：US723266

申请日：1991-06-28

申请人： Tomas Backstrom ,  Torbjorn Ward ,  Gustav Larsson

发明人： Tomas Backstrom ,  Torbjorn Ward ,  Gustav Larsson

IPC分类号： H04L7/033 ,  H04L7/04 ,  H04L25/03 ,  H03H7/30

CPC分类号： H04L25/03178 ,  H04L2025/03401 ,  H04L2025/03789 ,  H04L2025/03796 ,  H04L7/033 ,  H04L7/041

摘要： Reception of a transmission in a radiotelephone system including an equalizer is improved by training the equalizer using a synchronization portion of the transmission having a data pattern chosen for its correlation properties and retraining the equalizer using a portion of the transmission transmitted for a different purpose. In particular, the portion of the transmission transmitted for a different purpose may be the digital verification color code transmitted during each burst in a digital cellular mobile radiotelephone system. Reception quality is increased by training the equalizer at more frequent intervals without increasing transmission overhead.

摘要翻译： 通过使用具有为其相关属性选择的数据模式的传输的同步部分来训练均衡器来改善包括均衡器的无线电话系统中的传输的接收，并且使用为不同目的发送的传输的一部分重新训练均衡器。 特别地，为了不同目的而发送的传输部分可以是在数字蜂窝移动无线电话系统中的每个突发期间发送的数字验证色码。 通过以更频繁的间隔训练均衡器来增加接收质量，而不增加传输开销。