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    • 1. 发明授权
    • Systems and methods for controlling audible speech distortion in a GPS-based CDMA wireless network using ATM transport
    • 用于在基于GPS的CDMA无线网络中使用ATM传输来控制语音失真的系统和方法
    • US06898212B1
    • 2005-05-24
    • US09713778
    • 2000-11-14
    • Dexter ChunManoj DeshpandeSteve HicksBob KnightKC LeeRavi PalakodetyRamesh RamaswamyGustavo SerenaDave WalkerJun Zhang
    • Dexter ChunManoj DeshpandeSteve HicksBob KnightKC LeeRavi PalakodetyRamesh RamaswamyGustavo SerenaDave WalkerJun Zhang
    • H04B7/26H04J3/06
    • H04B7/2628
    • A Base Station Controller (BSC) that reduces the occurrence of audible noise in a Code Division Multiple Access (CDMA) radio network is provided. The BSC according to one embodiment of the present invention comprises a Media Stream Board (MSB) for compressing groups of 160 PCM speech samples from a Public Switch Telephone Network (PSTN) into vocoded frames, and a Special Purpose Board (SPB) for reformatting the vocoded frames from the MSB into over-the-air CDMA vocoded frames. The MSB and SPB each have a local timer that is slave to “PSTN time”. The BSC further comprises a Timing Unit Board (TUB) connected to a GPS receiver. The TUB receives “GPS time” from the GPS receiver. The TUB generates timing cells, each containing time-of-day information according to “GPS time”. The TUB distributes the timing cells to the MSB and the SPB over an Asynchronous Transfer Mode (ATM) network. The MSB and SPB use the received timing cells to compare their local timer, which tracks “PSTN time”, to “GPS time”. The MSB and the SPB realign their local timer with “GPS time” whenever their local timer drifts from “GPS time” outside of a predetermined time window.
    • 提供了一种在码分多址(CDMA)无线电网络中减少可听噪声的发生的基站控制器(BSC)。 根据本发明的一个实施例的BSC包括用于将来自公共交换电话网(PSTN)的160个PCM语音样本的组压缩为声码帧的媒体流板(MSB),以及专用板(SPB),用于重新格式化 从MSB到无线CDMA语音码帧的声码帧。 MSB和SPB每个都有一个本地定时器,从站到“PSTN时间”。 BSC还包括连接到GPS接收机的定时单元板(TUB)。 TUB从GPS接收机接收“GPS时间”。 TUB产生定时单元,每个单元包含根据“GPS时间”的日期信息。 TUB通过异步传输模式(ATM)网络将定时单元分配给MSB和SPB。 MSB和SPB使用接收到的定时单元将其“PSTN时间”跟踪的本地定时器与“GPS时间”进行比较。 当本地定时器从预定时间窗口之外的“GPS时间”漂移时,MSB和SPB将其本地定时器重新对准“GPS时间”。
    • 4. 发明授权
    • Registration timer adjustment based on wireless network quality
    • 基于无线网络质量的注册定时器调整
    • US08971883B2
    • 2015-03-03
    • US11557448
    • 2006-11-07
    • Sudeep Ravi KottilingalRamesh Ramaswamy
    • Sudeep Ravi KottilingalRamesh Ramaswamy
    • H04B17/00H04W4/00H04W28/18H04L29/08H04L29/06H04W24/00H04W60/00
    • H04W28/18H04L65/1006H04L65/1073H04L67/04H04L67/14H04L67/143H04L67/147H04L67/322H04L69/28H04W24/00H04W60/00
    • The disclosure is directed to managing registration of a wireless communication device (WCD) operating in a wireless network. The WCD may support registration according to a signaling protocol, such as session initiation protocol (SIP). The WCD adjusts a registration timer based on network quality experienced by the WCD. When network quality is poor, for example, the WCD reduces the length of the registration timer. Reduced network quality may indicate that the WCD is at risk of losing network coverage. By reducing the length of the registration timer when network quality is degraded, stale registrations for out-of-coverage WCDs can be reduced. In particular, the shortened registration timer will expire more quickly, permitting the registration to be cleared more quickly. Consequently, the amount of call forwarding and other resources devoted to stale registrations can be reduced. If the WCD retains network coverage, it can maintain a registration by sending another registration request.
    • 本公开涉及管理在无线网络中操作的无线通信设备(WCD)的注册。 WCD可以根据诸如会话发起协议(SIP)的信令协议来支持注册。 WCD根据WCD所经历的网络质量调整注册计时器。 当网络质量差时,例如,WCD减小了注册定时器的长度。 降低网络质量可能表明WCD有可能丢失网络覆盖。 通过减少网络质量降低时的注册定时器的长度,可以减少覆盖范围外的WCD的过时的注册。 特别地,缩短的注册定时器将更快地过期,从而允许更快地清除注册。 因此,可以减少用于过期注册的呼叫转移和其他资源的数量。 如果WCD保留网络覆盖,则可以通过发送另一个注册请求来维护注册。
    • 5. 发明申请
    • REGISTRATION TIMER ADJUSTMENT BASED ON WIRELESS NETWORK QUALITY
    • 基于无线网络质量的注册定时器调整
    • US20080108348A1
    • 2008-05-08
    • US11557448
    • 2006-11-07
    • Sudeep Ravi KottilingalRamesh Ramaswamy
    • Sudeep Ravi KottilingalRamesh Ramaswamy
    • H04Q7/20
    • H04W28/18H04L65/1006H04L65/1073H04L67/04H04L67/14H04L67/143H04L67/147H04L67/322H04L69/28H04W24/00H04W60/00
    • The disclosure is directed to managing registration of a wireless communication device (WCD) operating in a wireless network. The WCD may support registration according to a signaling protocol, such as session initiation protocol (SIP). The WCD adjusts a registration timer based on network quality experienced by the WCD. When network quality is poor, for example, the WCD reduces the length of the registration timer. Reduced network quality may indicate that the WCD is at risk of losing network coverage. By reducing the length of the registration timer when network quality is degraded, stale registrations for out-of-coverage WCDs can be reduced. In particular, the shortened registration timer will expire more quickly, permitting the registration to be cleared more quickly. Consequently, the amount of call forwarding and other resources devoted to stale registrations can be reduced. If the WCD retains network coverage, it can maintain a registration by sending another registration request
    • 本公开涉及管理在无线网络中操作的无线通信设备(WCD)的注册。 WCD可以根据诸如会话发起协议(SIP)的信令协议来支持注册。 WCD根据WCD所经历的网络质量调整注册计时器。 当网络质量差时,例如,WCD减小了注册定时器的长度。 降低网络质量可能表明WCD有可能丢失网络覆盖。 通过减少网络质量降低时的注册定时器的长度,可以减少覆盖范围外的WCD的过时的注册。 特别地,缩短的注册定时器将更快地过期,从而允许更快地清除注册。 因此,可以减少用于过期注册的呼叫转移和其他资源的数量。 如果WCD保留网络覆盖,则可以通过发送另一个注册请求来维护注册