-
公开(公告)号：US4897835A
公开(公告)日：1990-01-30
申请号：US352635
申请日：1989-05-12
CPC分类号： H04W88/187 , G04G21/04 , G04R20/14 , G04R20/20 , G04R60/04 , G08B3/1016 , G08B5/223 , G08B5/228 , H04L1/18 , H04W88/026
摘要： A wide area paging system is disclosed in which paging messages input to the system in one local area can be broadcast to a receiver in any other local area without necessarily broadcasting the message in all areas. A local area clearinghouse in each area stores resident subscriber data including current location and receiver serial number. This data is used to transfer messages over a data network to the correct clearinghouse. The system uses a TDM data protocol. The data is encoded and transmitted at a very high rate (e.g., 19,000 baud) in short packets (256 bits/13 milliseconds) via stereo FM sidebands. Receivers are assigned to receive sequentially numbered time slots matching a portion of their address. The addresses of intended receivers are included in the data packets. Battery-powered receivers are deactivated between packets and reactivated in accordance with the sequential time slot number scheme to receive an incoming packet. Messages longer than a packet are segmented and transmitted in two or more packets, linked together by data contained in the packets. A watch pager used in the system employs a wristband antenna which electromagnetically couples to the user's body. The watch pager displays time, telephone numbers and icons representing common types of paging messages.
摘要翻译： 公开了一种广泛的寻呼系统，其中输入到一个局部区域中的系统的寻呼消息可以被广播到任何其他本地区域中的接收机，而不必在所有区域中广播消息。 每个区域的地方信息交换中心存储驻地用户数据，包括当前位置和接收者序列号。 该数据用于通过数据网络将消息传送到正确的信息交换所。 该系统使用TDM数据协议。 数据通过立体声FM边带以短数据包（256位/ 13毫秒）以非常高的速率（例如，19,000波特）进行编码和传输。 分配接收器以接收与其地址的一部分匹配的顺序编号的时隙。 预期接收机的地址包含在数据包中。 电池供电的接收器在分组之间被去激活，并根据顺序时隙号方案重新激活以接收输入分组。 比数据包更长的消息被分段并在两个或更多个数据包中发送，通过包中包含的数据链接在一起。 系统中使用的手表寻呼机采用电磁耦合到用户身体的腕带天线。 手表寻呼机显示代表常见类型的寻呼消息的时间，电话号码和图标。
-
公开(公告)号：US5266945A
公开(公告)日：1993-11-30
申请号：US642131
申请日：1991-01-15
申请人： William H. Peek , Garold B. Gaskill
发明人： William H. Peek , Garold B. Gaskill
IPC分类号： G04G21/04 , H04B1/08 , H04B1/16 , H04L1/18 , H04W52/02 , H04W84/02 , H04W88/02 , H04W88/18 , H04B7/00
CPC分类号： G04G21/04 , H04B1/088 , H04B1/1615 , H04W52/0229 , H04L1/18 , H04W52/0287 , H04W88/026 , H04W88/185 , Y02B60/50
摘要： A method for searching for a station carrying paging data without unduly draining the paging receiver battery. If a station to which the receiver is presently tuned becomes unreliable, the pager scans among channels listed in a local channel list. If no paging data is received on these channels, the scanning among the local list channels may optionally proceed for a further interval at a slower rate. After it appears that paging data will not be found on channels listed in the local list, the pager begins a full spectrum search at a slow rate until it again finds a channel carrying paging data. By this arrangement, battery power is expended at a rate roughly in accordance with the likelihood of finding a paging station.
摘要翻译： 一种用于搜索携带寻呼数据的站而不会不适当地排出寻呼接收机电池的方法。 如果接收机当前被调谐到的站变得不可靠，则寻呼机在本地频道列表中列出的频道之间扫描。 如果在这些信道上没有接收到寻呼数据，则本地列表信道之间的扫描可以可选地以更慢的速率进行进一步的间隔。 看来在本地列表中列出的通道上找不到寻呼数据，寻呼机以缓慢的速率开始全频谱搜索，直到它再次找到载有寻呼数据的信道。 通过这种安排，电池电量以大致根据找到寻呼台的可能性的速率消耗。
-
公开(公告)号：US5170487A
公开(公告)日：1992-12-08
申请号：US662097
申请日：1991-02-28
申请人： William H. Peek
发明人： William H. Peek
CPC分类号： H04W68/00 , G08B3/1016 , H04W88/022 , H04W52/0216 , H04W74/04 , H04W88/06
摘要： The present invention provides a pager system which integrates a plurality of transmitters which operate at different frequencies. Some of the transmitters transmit paging messages using FM subcarrier signals (termed FM-SCA signals) and some transmit messages using a modulated carrier (termed RCC signals). The receiver includes two front ends. One front end receives and demodulates FM-SCA signals and one front end receives and demodulates RCC signals. Each paging message is transmitted on both FM-SCA transmitters and on RCC transmitters. The signals on each of the transmitters are slightly off set in time. When an assigned time slot occurs, one receiver turns on and attempts to receive a message, if it does not receive an appropriate signal, it tunes to another station that is in a stored list of stations. If the next station has an RCC flag associated therewith the RCC receiver rather than the FM-SCA receiver is operated. The entire process is controlled by a microprocessor which is a part of the system.
摘要翻译： 本发明提供了一种集成了以不同频率工作的多个发射机的寻呼机系统。 一些发射机使用FM子载波信号（称为FM-SCA信号）发送寻呼消息，并使用调制载波（称为RCC信号）发送一些发送消息。 接收机包括两个前端。 一个前端接收和解调FM-SCA信号，一个前端接收和解调RCC信号。 每个寻呼消息都在FM-SCA发射机和RCC发射机上传输。 每个发射机上的信号在时间上略微偏移。 当发生分配的时隙时，一个接收机打开并尝试接收消息，如果它没有接收到适当的信号，则它调谐到位于存储的站列表中的另一个站。 如果下一个站具有与其相关联的RCC标志，则操作RCC接收机而不是FM-SCA接收机。 整个过程由作为系统一部分的微处理器控制。
-
-
搜索结果
3 条记录 (耗时 0.027 秒)
