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1.发明授权Systems and methods for uplinking downsampled radiotelephone signals from cellular radiotelephone base stations to a cellular radio exchange 失效用于将下采样的无线电话信号从蜂窝无线电话基站上行到蜂窝无线电交换机的系统和方法公开(公告)号：US06792267B1
公开(公告)日：2004-09-14
申请号：US09087528
申请日：1998-05-29
IPC分类号： H04Q720
CPC分类号： H04B7/0613 , H04B7/04 , H04W88/08 , H04W92/12
摘要： Cellular radiotelephone communication systems and methods downlink digital coded speech from a cellular radio exchange to a cellular radiotelephone base station and uplink downsampled (i.e. undersampled relative to the Nyquist rate of two samples per symbol) radiotelephone signals from the cellular radiotelephone base station to the cellular radio exchange. The downsampled radiotelephone signals are demodulated at the cellular radio exchange and the digital coded speech is modulated at the cellular radiotelephone base station. Diversity demodulation may be used at the cellular radio exchange, to diversity demodulate the downsampled radiotelephone signals at the cellular radio exchange. By downlinking digital coded speech from the cellular radio exchange to the cellular radiotelephone base station, and uplinking downsampled radiotelephone signals from the cellular radiotelephone base station to the cellular radio exchange, narrowband uplinks and downlinks may be provided between the base stations and the cellular radio exchange, to thereby reduce cost. Moreover, since demodulation takes place at the cellular radio exchange rather than at the base stations, low cost base stations may be provided. However, since downsampled radiotelephone signals are transmitted from the base stations to the cellular radio exchange, diversity demodulation may be performed at the cellular radio exchange, to thereby improve the voice quality of the cellular radiotelephone communications.
摘要翻译： 蜂窝无线电话通信系统和方法从蜂窝无线电交换机向蜂窝无线电话机基站和下行数字编码语音下行数字编码语音，并且从蜂窝无线电话机基站向蜂窝无线电中下行采样（即，相对于每符号两个样本的奈奎斯特速率欠采样）无线电话信号 交换。 下行采样的无线电话信号在蜂窝无线电交换机处解调，数字编码语音在蜂窝无线电话基站上进行调制。 在蜂窝无线电交换中可以使用分集解调，以在蜂窝无线电交换中对下采样的无线电话信号进行分集解调。 通过将数字编码语音从蜂窝无线电交换机下行链路传送到蜂窝无线电话机基站，并将下行采样的无线电话信号从蜂窝无线电话机基站上行传输到蜂窝无线电交换机，可以在基站和蜂窝无线电交换机之间提供窄带上行链路和下行链路 ，从而降低成本。 此外，由于在蜂窝无线电交换而不是在基站处进行解调，因此可以提供低成本的基站。 然而，由于下采样的无线电话信号从基站发送到蜂窝无线电交换机，所以可以在蜂窝无线电交换机上进行分集解调，从而提高蜂窝无线电话通信的语音质量。
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公开(公告)号：US6147983A
公开(公告)日：2000-11-14
申请号：US995543
申请日：1997-12-22
申请人： Tomas Backstrom
发明人： Tomas Backstrom
摘要： A base station comprises a plurality of transceivers, one of which normally performs verifications, but is able to handle traffic channels at time of high demand. When it is desired to block one transceiver, for example for maintenance purposes, calls allocated to that transceiver can be handed off to other transceivers before the device is fully blocked.
摘要翻译： 基站包括多个收发器，其中之一通常执行验证，但能够在高需求时处理话务信道。 当希望阻止一个收发器时，例如为维护目的，分配给该收发器的呼叫可以在设备完全阻塞之前切换到其他收发器。
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公开(公告)号：US5229996A
公开(公告)日：1993-07-20
申请号：US915755
申请日：1992-07-21
申请人： Tomas Backstrom , Anders Sandell , Peter Wahlstrom
发明人： Tomas Backstrom , Anders Sandell , Peter Wahlstrom
CPC分类号： H04W56/005 , H04B7/2681 , H04J3/0602 , H04J3/0682 , H04W56/0075 , H04W56/0085 , H04L7/08
摘要： Synchronization is maintained between a regional radio transmitter/receiver and a remote transmitter/receiver communicating across a TDMA channel by detecting time misalignment of communications from the remote transmitter/receiver to the regional transmitter/receiver, commanding the remote transmitter/receiver to adjust its transmission timing, and, until the remote transmitter/receiver has adjusted its transmission timing, looking for a synchronization pattern accompanying transmissions by the remoter transmitter/receiver during two discontinuous time intervals, one centered about a time of occurrence of the synchronization pattern before the command and another centered about an expected time of occurrence of the synchronization pattern in response to the command. Effectively, what would otherwise be a disadvantageously wide time window is split into two advantageously narrow time windows to avoid detection of false syncs. Fewer false syncs are detected, and speech quality is increased.
摘要翻译： 通过检测从远程发射机/接收机到区域发射机/接收机的通信的时间偏移来指示区域无线电发射机/接收机与通过TDMA信道通信的远程发射机/接收机之间的同步，命令远程发射机/接收机调整其传输 定时，并且直到远程发射机/接收机已经调整了其传输定时，寻找伴随远程发射机/接收机在两个不连续时间间隔期间传输的同步模式，一个以指令之前的同步模式出现时间为中心， 另一个以响应于该命令的同步模式的预期时间为中心。 实际上，否则将是不利的宽时间窗口分成两个有利的窄时间窗口，以避免检测到假同步。 检测到较少的错误同步，语音质量提高。
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公开(公告)号：US06748214B1
公开(公告)日：2004-06-08
申请号：US09368327
申请日：1999-08-03
IPC分类号： H04Q720
摘要： A mobile station can be used in both public cellular systems and private cellular systems, the private cellular system using select allocated frequency bands from the public cellular systems. There is disclosed herein a system for manually searching for one of the private cellular systems. The system comprises a memory storing information on select frequency bands. A transmitter and receiver is provided for communicating in the public cellular systems and the private cellular systems. An input initiates a manual search for one of the private cellular systems using the stored information on one of the select frequency bands. A programmed processor is operatively coupled to the memory, the transmitter and receiver and the input for operating the transmitter and receiver to search for the one private cellular system using the one of the select frequency bands.
摘要翻译： 移动台可以在公共蜂窝系统和私人蜂窝系统中使用，私有蜂窝系统使用来自公共蜂窝系统的选择分配的频带。 这里公开了用于手动搜索私有蜂窝系统之一的系统。 该系统包括存储关于选择频带的信息的存储器。 提供发射机和接收机用于在公共蜂窝系统和私人蜂窝系统中进行通信。 输入使用所选择的频带之一上存储的信息来启动对一个专用蜂窝系统的手动搜索。 编程处理器可操作地耦合到存储器，发射器和接收器以及用于操作发射器和接收器的输入端，以使用所选择的频带之一搜索一个专用蜂窝系统。
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5.发明授权Systems and methods for deactivating a cellular radiotelephone system using an ANSI-41 short message service email 失效使用短消息服务电子邮件去激活蜂窝无线电话系统的系统和方法公开(公告)号：US06289214B1
公开(公告)日：2001-09-11
申请号：US09087085
申请日：1998-05-29
申请人： Olof Tomas Backstrom
发明人： Olof Tomas Backstrom
IPC分类号： H04M1100
摘要： A cellular radiotelephone system including a Cellular Radio Exchange (CRE) and a plurality of radio heads (base stations) is deactivated, by sending an email including a deactivation message to the CRE via a communications protocol other than TCP/IP, such that the CRE deactivates the cellular radiotelephone system in response to receipt of the email including the deactivation message. Preferably, the email including the deactivation message is sent to the CRE via ANSI-41 communications protocol that is also used to communicate messages for automatic roaming, authentication, voice privacy and other services. Most preferably, the email including the deactivation message is sent to the CRE via ANSI-41 Short Message Service (SMS) communications protocol that supports email between a cellular operator system and a cellular radiotelephone system. The deactivation message may be processed by receiving the email including the deactivation message at the CRE via the communications protocol other than TCP/IP, preferably ANSI-41 and most preferably ANSI-41 SMS. A “fictitious” radiotelephone is assigned at the CRE for receipt of the ANSI-41 SMS deactivation email. The received email is sent to the fictitious radiotelephone using ANSI-41 SMS communications protocol. The fictitious radiotelephone converts the ANSI-41 SMS email to a TCP/IP email. The converted email is then used to deactivate the cellular radiotelephone system.
摘要翻译： 通过经由除TCP / IP之外的通信协议向CRE发送包括去激活消息的电子邮件，包括蜂窝无线电交换（CRE）和多个无线电头（基站）的蜂窝无线电话系统被去激活，使得CRE 响应于接收到包括停用消息的电子邮件，停用蜂窝无线电话系统。 优选地，包括去激活消息的电子邮件通过ANSI-41通信协议发送到CRE，其也用于传送用于自动漫游，认证，语音隐私和其他服务的消息。 最优选地，包括去激活消息的电子邮件通过支持蜂窝操作员系统和蜂窝无线电话系统之间的电子邮件的ANSI-41短消息服务（SMS）通信协议发送到CRE。 可以通过经由除TCP / IP之外的通信协议（优选地是ANSI-41，最优选地是ANSI-41 SMS）在CRE处接收包括去激活消息的电子邮件来处理去激活消息。 在CRE分配一个“虚拟”无线电话机，以接收ANSI-41 SMS停用电子邮件。 收到的电子邮件将使用ANSI-41 SMS通信协议发送到虚拟无线电话机。 虚拟无线电话机将ANSI-41 SMS电子邮件转换为TCP / IP电子邮件。 转换的电子邮件然后用于停用蜂窝无线电话系统。
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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
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。
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7.发明授权Cellular radiotelephone systems and methods that broadcast a common control channel over multiple radio frequencies 失效在多个无线电频率上广播公共控制信道的蜂窝无线电话系统和方法公开(公告)号：US06477377B2
公开(公告)日：2002-11-05
申请号：US09087357
申请日：1998-05-29
IPC分类号： H04Q736
摘要： Cellular radiotelephone systems and methods communicate with cellular radiotelephones via multiple base stations. Radiotelephone traffic channels are used by the base stations for radiotelephone communications with the telephones. A common control channel is transmitted by the base stations, to control radiotelephone communications with the radiotelephones over the radiotelephone traffic channels. The common control channel is transmitted by a first one of the base stations over a first radio frequency and is transmitted by a second one of the base stations over a second radio frequency that is different from the first radio frequency. By providing a common control channel, excess control channel capacity can be reduced, thereby conserving control channel radio spectrum. Moreover, by transmitting the common control channel using multiple radio frequencies, the radio frequencies can be selected to reduce and preferably eliminate interference.
摘要翻译： 蜂窝无线电话系统和方法通过多个基站与蜂窝无线电话通信。 无线电话业务信道被基站用于与电话的无线电话通信。 基站发送公共控制信道，通过无线电话业务信道控制与无线电话机的无线电话通信。 所述公共控制信道由所述基站中的第一基站通过第一射频发送，并且由所述基站中的第二基站通过与所述第一射频不同的第二射频来发送。 通过提供公共控制信道，可以减少超控制信道容量，从而节省控制信道无线电频谱。 此外，通过使用多个无线电频率发送公共控制信道，可以选择射频以减少并优选地消除干扰。
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