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    • 2. 发明申请
    • METHOD AND APPARATUS FOR IMPROVING THE VOICE QUALITY OF TANDEMED VOCODERS
    • 用于改善标准音色的声音质量的方法和装置
    • WO1999000791A1
    • 1999-01-07
    • PCT/CA1997000835
    • 1997-11-05
    • NORTHERN TELECOM LIMITED
    • NORTHERN TELECOM LIMITEDMERMELSTEIN, PaulRABIPOUR, RafiNAVARRO, WilliamCOVERDALE, Paul
    • G10L09/14
    • G10L19/16H04W88/181
    • In recent years, the telecommunications industry has witnessed the proliferation of a variety of digital vocoders in order to meet bandwidth demands of different wireline and wireless communication systems. The rapid growth in the diversity of networks and the number of users of such networks is increasing the number of instances where two vocoders are placed in tandem to serve a single connection. Such arrangements of low bit-rate codecs can degrade the quality of the transmitted speech. To overcome this problem the invention provides a novel method and an apparatus for transmitting digitized voice signals in the wireless communications environment. The apparatus is capable of converting a compressed speech signal from one format to another format via an intermediate common format, thus avoiding the necessity to successively de-compress voice data to a PCM type digitization and then recompress the voice data.
    • 近年来,电讯业目睹了各种数字声码器的扩散,以满足不同有线和无线通讯系统的带宽需求。 网络的多样性的快速增长和这种网络的用户数量正在增加两个声码器串联放置以服务于单个连接的情况的数量。 这种低比特率编解码器的布置可能降低所传送语音的质量。 为了克服这个问题,本发明提供了一种用于在无线通信环境中发送数字化语音信号的新颖方法和装置。 该装置能够通过中间公共格式将压缩的语音信号从一种格式转换成另一格式,从而避免必须将语音数据连续解压缩到PCM型数字化,然后再重新压缩语音数据。
    • 6. 发明申请
    • DELIVERY OF DISPLAY INFORMATION TO THE CALLER IN AN ADVANCED INTELLIGENT NETWORK
    • 在先进的智能网络中向电话提供显示信息
    • WO1998028922A1
    • 1998-07-02
    • PCT/CA1997000831
    • 1997-11-07
    • NORTHERN TELECOM LIMITED
    • NORTHERN TELECOM LIMITEDTESSLER, MichaelBELZILE, PierreMEUBUS, Charles
    • H04Q03/00
    • H04M15/28H04M1/57H04Q3/0029
    • The invention provides a method and a system for selectively delivering information to callers in an AIN environment. In accordance with the method the service switching point to which is connected the terminal equipment of the caller monitors the condition of the telephone line to detect an AIN trigger, such as an off-hook event among other possibilities. When such event occurs, the service switch point formulates a message query. The query is routed to a service control point via one or more service transfer points, that holds knowledge of the service subscribed by the caller and the information to be displayed for this service. The service control point analyzes the request and assembles the appropriate response. That response is then returned to the service switch point that formats it properly and delivers it to the terminal equipment of the caller. In one embodiment the information delivery is effected during call establishment. In a variant, information is delivered while no call is being attempted.
    • 本发明提供了一种用于在AIN环境中选择性地向呼叫者传递信息的方法和系统。 根据该方法,与呼叫者的终端设备连接的业务交换点监视电话线路的状态以检测AIN触发,例如摘机事件等。 当这样的事件发生时,服务交换点就形成消息查询。 该查询经由一个或多个服务传送点路由到服务控制点,该服务传送点保存由呼叫者订阅的服务的知识以及要为该服务显示的信息。 服务控制点分析请求并组合适当的响应。 然后将该响应返回到正确格式化的服务交换点,并将其传递给呼叫者的终端设备。 在一个实施例中,在呼叫建立期间进行信息传送。 在一个变体中,在不尝试呼叫的情况下传送信息。
    • 7. 发明申请
    • RADIO LINK QUALITY HANDOFF TRIGGER
    • 无线链接质量手动触发器
    • WO1998027777A2
    • 1998-06-25
    • PCT/IB1997001579
    • 1997-12-17
    • NORTHERN TELECOM LIMITEDCURTIS, David, E.BOOK, William, B.BOETTGER, David, A.JALALI, Ahmad
    • NORTHERN TELECOM LIMITED
    • H04Q07/38
    • H04W36/30
    • A method and system is disclosed for triggering handoff of a call from a CDMA network to an AMPS network on which it is overlaid responsive to a determination that the CDMA RF link has degraded to such an extent that the call quality will be degraded significantly or the call is likely to be dropped is disclosed. A handoff of a call from a CDMA network to an AMPS network if, at a given time: (1) the number of forward link erasures is greater than a first maximum number of forward link erasures; or (2) the number of reverse link erasures is greater than a first maximum number of forward link erasures; or (3) the number of forward link erasures is greater than a second maximum number of forward link erasures and the forward traffic channel gain is greater than a maximum forward traffic channel gain; or (4) the number of reverse link erasures is greater than a second maximum number of reverse link erasures and the ratio of energy per bit to noise power spectral density on the reverse link ("EB/NO") is greater than a maximum EB/NO. In alternative embodiments, the present invention may be used to trigger handoff of a call from a first CDMA cell site to a second CDMA cell site or to an AMPS cell site serving a cell on which the cell served by the first CDMA cell site is not overlaid.
    • 公开了一种方法和系统,用于响应于确定CDMA RF链路已经劣化到使得呼叫质量显着降低的程度,触发从CDMA网络到AMPS网络的呼叫切换到覆盖其的AMPS网络 电话有可能被丢弃被披露。 如果在给定时间(1)前向链路擦除的数量大于前向链路擦除的第一最大数量,则从CDMA网络到AMPS网络的呼叫的切换; 或(2)反向链路擦除次数大于前向链路擦除的第一个最大数量; 或者(3)正向链路擦除次数大于前向链路擦除的第二个最大数量,并且前向业务信道增益大于最大前向业务信道增益; 或(4)反向链路擦除的次数大于反向链路擦除的第二个最大数量,并且反向链路上的每比特能量与噪声功率谱密度之比(“EB / NO”)大于最大EB /没有。 在替代实施例中,本发明可以用于触发从第一CDMA小区站点到第二CDMA小区站点的呼叫切换,或者服务于由第一CDMA小区站点服务的小区不服务的小区的AMPS小区站点 覆盖。
    • 9. 发明申请
    • METHOD OF PASSING A PBX STATION DIRECTORY NUMBER OVER AN AIR INTERFACE
    • 通过空中接口通过集团电话站目录号的方法
    • WO1998027757A2
    • 1998-06-25
    • PCT/CA1997000934
    • 1997-12-03
    • NORTHERN TELECOM LIMITED
    • NORTHERN TELECOM LIMITEDKAO, Joel
    • H04Q07/20
    • H04W48/08
    • A fixed wireless access system comprising a base station for bidirectional communication with a switching center, a private branch exchange (PBX) for establishing bidirectional communication with a plurality (K) of user stations, and a wireless trunk interface (WTI) for bidirectional wireless communication with the base station over an air interface and for bidirectional communication with the PBX over a trunk line is disclosed. The invention also proposes to deliver the station directory number (DN) over the fast associated control channel (FACCH) or the slow associated control channel (SACCH) of the IS-54B air interface. This is achieved using DTMF signalling or by providing a new set of messages in the extended protocol (EP) capability of the IS-54B air interface.
    • 一种固定无线接入系统,包括用于与交换中心双向通信的基站,用于与多个(K)用户站建立双向通信的专用小交换机(PBX)以及用于双向无线通信的无线中继接口(WTI) 公开了通过空中接口的基站和通过中继线与集团电话的双向通信。 本发明还提出通过IS-54B空中接口的快速关联控制信道(FACCH)或慢关联控制信道(SACCH)传送站目录号码(DN)。 这是通过使用DTMF信令或通过在IS-54B空中接口的扩展协议(EP)能力中提供新的一组消息来实现的。