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公开(公告)号：US5305308A
公开(公告)日：1994-04-19
申请号：US968559
申请日：1992-10-29
申请人： Michael J. English , Charles Y. Farwell , Michael L. Hearn , Richard M. Heidebrecht , David M. Kissel , Paul E. Miller , Richard D. Miller , Alan S. Mulberg , Michael A. Smith , Douglas A. Spencer , John S. Thompson , Richard A. Windhausen
发明人： Michael J. English , Charles Y. Farwell , Michael L. Hearn , Richard M. Heidebrecht , David M. Kissel , Paul E. Miller , Richard D. Miller , Alan S. Mulberg , Michael A. Smith , Douglas A. Spencer , John S. Thompson , Richard A. Windhausen
CPC分类号： H04W36/18 , H04J3/0632
摘要： A wireless-access communications system, such as a CDMA cellular radio-telephone system (FIG. 2), comprises a packet-switched communications network (202, 207, 201) that interconnects cells (base stations; 202) with each other and with the public telephone network (100). Traffic of individual calls is packetized, and packet-bearing frames (300 in FIG. 7) of a plurality of calls are then statistically multiplexed and frame-relayed through the network to yield the high capacity, efficiency, and speed of traffic transport and handoff required for a CDMA cellular system. At each call processing unit (264 in FIG. 5), individual calls are handled by individual service circuits (602 & 612) which perform speech-processing functions such as coding and decoding, tone insertion, and echo cancellation, and packet-to-circuit-switched-PCM traffic conversion. Processors (602) adapt call processing unit timing to compensate for asynchrony between cells and call processing units and variations in call path transmission delays. Cell-to-cell communications, fixed call path addressing, and packetized control message transfers ensure that the same service circuit handles a call through even multiple soft handoffs (FIGS. 27-29) and efficiently communicates simultaneously with all cells involved in the handoff without involvement of system control entities and negative effect on system call-handling capacity. Both coded (packet-switched) and uncoded (circuit-switched) radio-telephone traffic are accommodated side-by-side. Wherever possible, existing and proven technology and component units are used to achieve low cost and high reliability.
摘要翻译： 诸如CDMA蜂窝无线电电话系统（图2）的无线接入通信系统包括：将小区（基站; 202）互相连接并分组交换通信网络（202,207,201）的分组交换通信网络 公共电话网络（100）。 单个呼叫的业务被分组，并且多个呼叫中的分组承载帧（图7中的300）然后通过网络进行统计复用和帧中继，以产生高容量，高效率和速度的业务传输和切换 CDMA蜂窝系统所需要的。 在每个呼叫处理单元（图5中的264）中，单独的呼叫由执行诸如编码和解码，音调插入和回声消除之类的语音处理功能的单独服务电路（602＆612）来处理， 电路交换PCM流量转换。 处理器（602）适应呼叫处理单元定时以补偿小区和呼叫处理单元之间的不同步以及呼叫路径传输延迟的变化。 单元到蜂窝通信，固定呼叫路径寻址和分组化控制消息传输确保相同的服务电路通过甚至多个软切换来处理呼叫（图27-29），并且与切换中涉及的所有小区同时有效地通信，而没有 系统控制实体的参与和对系统呼叫处理能力的负面影响。 编码（分组交换）和未编码（电路交换）无线电话业务都并排并入。 只要有可能，现有和成熟的技术和组件单元用于实现低成本和高可靠性。
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公开(公告)号：US5195091A
公开(公告)日：1993-03-16
申请号：US727492
申请日：1991-07-09
申请人： Charles Y. Farwell , Michel L. Hearn , Richard M. Heidebrecht , Kelvin K. Ho , Douglas A. Spencer
发明人： Charles Y. Farwell , Michel L. Hearn , Richard M. Heidebrecht , Kelvin K. Ho , Douglas A. Spencer
CPC分类号： H04J3/0658 , H04B7/2668 , H04W36/18 , H04J3/0632 , H04J3/0664 , H04J3/0673 , H04W56/00
摘要： A CDMA cellular radio-telephone system (FIG. 2) has switching systems (201) synchronized to public telephone network (100) timing signals (600), and radio telephones (203) and cell base stations (202) synchronized to a different clock (1000). Transmission delays between the cell base stations and the telephone network are variable. Switching systems include digital communications interfaces (264) to the telephone system, whose connections to the telephone system are synchronized to the telephone system, and whose connections to the cells are nominally also synchronized to the telephone system but whose processor (602) operates for each call within predefined windows (1302, 1402) of phase relationships to the operation of the cell that is handling the call, and occasionally adjusts (FIGS. 13-16) its phase relationships to the operation of the telephone system to achieve and maintain its operation within the predefined windows. Packet-switched communications (350) between the cells and the switching systems absorb the phase relationship fluctuations and the timing adjustments in inter-packet intervals. Circuit-switched signal communications between the switching systems and the telephone system absorb the timing adjustments by means of vocoder (604)-implemented slips--bit insertions or deletions--in the communications traffic bit stream.
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公开(公告)号：US5396541A
公开(公告)日：1995-03-07
申请号：US965481
申请日：1992-10-23
CPC分类号： H04W36/0094 , H04L7/046
摘要： Signaling a mobile unit to transmit a synchronization pattern with voice information upon detecting from the signal strength of the wireless mobile unit by a base station that the mobile unit is approaching a minimum threshold. Where the voice information is initially being transmitted in a set of frequency hopping channels using spread spectrum transmission, the synchronization pattern is transmitted in one or more of the set of frequency hopping channels. In addition, the base station alerts a system controller to this fact, and the system controller requests that neighboring base stations monitor the set of frequency hopping channels being transmitted by the mobile unit. In order to synchronize to the mobile unit, the base stations utilize the synchronization pattern to come into synchronization with the mobile unit. The system controller transfers the wireless mobile unit to the base station which is receiving the strongest signal strength.
摘要翻译： 当移动单元正在接收到最小阈值时，基站检测到无线移动单元的信号强度时，信令移动单元发送具有语音信息的同步模式。 在首先使用扩频传输在一组跳频信道中发送语音信息的情况下，在一组跳频信道中的一个或多个中发送同步模式。 此外，基站向系统控制器通知该事实，并且系统控制器请求相邻基站监视由移动单元发送的跳频信道集合。 为了与移动单元同步，基站利用同步模式与移动单元同步。 系统控制器将无线移动单元传送到正在接收最强信号强度的基站。
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公开(公告)号：US5195090A
公开(公告)日：1993-03-16
申请号：US727498
申请日：1991-07-09
申请人： Brian D. Bolliger , Talmage P. Bursh, Jr. , Marc K. Dennison , Michael J. English , Charles Y. Farwell , Michel L. Hearn , Richard M. Heidebrecht , Kelvin K. Ho , Kenneth Y. Ho , David M. Kissel , Paul E. Miller , Richard D. Miller , Alan S. Mulberg , LaJeana N. Roberts , Michael A. Smith , Kenneth F. Smolik , Douglas A. Spencer , Kenneth W. Strom , John S. Thompson , Richard A. Windhausen
发明人： Brian D. Bolliger , Talmage P. Bursh, Jr. , Marc K. Dennison , Michael J. English , Charles Y. Farwell , Michel L. Hearn , Richard M. Heidebrecht , Kelvin K. Ho , Kenneth Y. Ho , David M. Kissel , Paul E. Miller , Richard D. Miller , Alan S. Mulberg , LaJeana N. Roberts , Michael A. Smith , Kenneth F. Smolik , Douglas A. Spencer , Kenneth W. Strom , John S. Thompson , Richard A. Windhausen
CPC分类号： H04W36/18 , H04J3/0632
摘要： A wireless-access communications system, such as a CDMA cellular radio-telephone system (FIG. 2), comprises a packet-switched communications network (202, 207, 201) that interconnects cells (base stations; 202) with each other and with the public telephone network (100). Traffic of individual calls is packetized, and packet-bearing frames (300 in FIG. 7) of a plurality of calls are then statistically multiplexed and frame-relayed through the network to yield the high capacity, efficiency, and speed of traffic transport and handoff required for a CDMA cellular system. At each call processing unit (264 in FIG. 5), individual calls are handled by individual service circuits (602 and 612) which perform speech-processing functions such as coding and decoding, tone insertion, and echo cancellation, and packet-to-circuit-switched-PCM traffic conversion. Processors (602) adapt call processing unit timing to compensate for asynchrony between cells and call processing units and variations in call path transmission delays. Cell-to-cell communications, fixed call path addressing, and packetized control message transfers ensure that the same service circuit handles a call through even multiple soft handoffs (FIGS. 27-29) and efficiently communicates simultaneously with all cells involved in the handoff without involvement of system control entities and negative effect on system call-handling capacity. Both coded (packet-switched) and uncoded (circuit-switched) radio-telephone traffic are accommodated side-by-side. Wherever possible, existing and proven technology and component units are used to achieve low cost and high reliability.
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公开(公告)号：US5444766A
公开(公告)日：1995-08-22
申请号：US131041
申请日：1993-10-01
摘要： An arrangement for effecting call handoffs in a wireless communications system (FIG. 1 ) in a substantially glitchless manner. The arrangement relies on the mobile terminal (4) that is involved in a handoff to trigger the handoff by transmitting a handoff coordination signal simultaneously to the base stations (1, 2) that are involved in the handoff. The base stations receive the signal substantially simultaneously, and in response the base station that has been serving the mobile terminal's call ceases to do so while the base station that is henceforth to serve the mobile terminal's call commences to do so at the same instant in time.
摘要翻译： 用于以基本无毛刺的方式在无线通信系统（图1）中实现呼叫切换的装置。 该装置依赖于涉及切换的移动终端（4），通过向切换中涉及的基站（1,2）同时发送切换协调信号来触发越区切换。 基站基本上同时接收信号，并且作为响应，一直服务于移动终端的呼叫的基站停止这样做，而今后将用于服务移动终端的呼叫的基站在相同时刻开始这样做 。
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公开(公告)号：US5491741A
公开(公告)日：1996-02-13
申请号：US965504
申请日：1992-10-23
CPC分类号： H04W74/0841 , H04B7/2656 , H04W88/08
摘要： Base stations responding on a shared channel to a registration request message received on another shared channel from a wireless mobile unit with the base station to which the mobile unit is assigned transmitting in a first time slot and the other base stations transmitting in a time slot determined by the strength of the received signal from the mobile unit. If two base stations respond to the registration request message in the same time slot and the assigned base station does not respond, the mobile unit determines whether there is a response in a time slot which is earlier in time to the first time slot than the collided time slot. If the collided time slot is earlier in time than any other time slot in which a response is received, the mobile unit transmits a second registration request message specifying the collided time slot. Each of the base stations that had responded in the collided time slot responds by sending a base reply message in a random time slot, and the other base stations do not respond to this second registration request message. The mobile unit selects one of the base reply messages in a random time slot.
摘要翻译： 基站在共享信道上响应于在另一个共享信道上从与移动单元分配的基站在无线移动单元上接收的注册请求消息在第一时隙中发送，并且其他基站在确定的时隙中发送 通过来自移动单元的接收信号的强度。 如果两个基站在相同的时隙中对注册请求消息做出响应，并且所分配的基站不响应，则移动单元确定是否在比第一时隙早的时隙中存在响应 时隙。 如果冲突时隙的时间早于接收到响应的任何其他时隙，则移动单元发送指定冲突时隙的第二注册请求消息。 在相关时隙中响应的每个基站通过在随机时隙中发送基本应答消息进行响应，而其他基站对该第二注册请求消息没有响应。 移动单元在随机时隙中选择一个基本应答消息。
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公开(公告)号：US5184347A
公开(公告)日：1993-02-02
申请号：US727491
申请日：1991-07-09
申请人： Charles Y. Farwell , Michel L. Hearn , Richard M. Heidebrecht , Kelvin K. Ho , Douglas A. Spencer
发明人： Charles Y. Farwell , Michel L. Hearn , Richard M. Heidebrecht , Kelvin K. Ho , Douglas A. Spencer
CPC分类号： H04J3/0658 , H04J3/0664 , H04J3/0673 , H04W84/04
摘要： A CDMA cellular radio-telephone system (FIG. 2) has switching systems (201) synchronized to public telephone network (100) timing signals (600), and radio telephones (203) and cell base stations (202) synchronized to different clock (1000). Transmission delays between the cell base stations and the telephone network are variable. Switching systems include digital communications interfaces (264) to the telephone system, whose connections to the telephone system are synchronized to the telephone system, and whose connections to the cells are nominally also synchronized to the telephone system but whose processor (602) operates for each call within predefined windows (1302, 1402) of phase relationships to the operation of the cell that is handling the call, and occasionally adjusts (FIGS. 13-16) its phase relationships to the operation of the telephone system to achieve and maintain its operation within the predefined windows. Packet-switched communications (350) between the cells and the switching systems absorb the phase relationship fluctuations and the timing adjustments in inter-packet intervals. Circuit-switched digital communications between the switching systems and the telephone system absorb the timing adjustments by means of vocoder (604)-implemented slips--bit insertions or deletions--in the communications traffic bit stream.
摘要翻译： CDMA蜂窝无线电电话系统（图2）具有与公共电话网络（100）同步的定时信号（600）和与不同时钟同步的无线电话（203）和小区基站（202）同步的交换系统（201） 1000）。 小区基站和电话网络之间的传输延迟是可变的。 交换系统包括到电话系统的数字通信接口（264），其电话系统的连接与电话系统同步，并且其与小区的连接在名义上也与电话系统同步，但其处理器（602）为每个 在与正在处理呼叫的小区的操作相关联的预定窗口（1302,1402）内呼叫，并且偶尔将其相位关系调整（图13-16）到电话系统的操作以实现和维持其操作 在预定窗口内。 小区和交换系统之间的分组交换通信（350）吸收相位关系波动和分组间间隔中的定时调整。 交换系统和电话系统之间的电路交换数字通信通过通信业务位流中的声码器（604）实现的滑移位插入或删除来吸收定时调整。
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