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公开(公告)号：EP0738452A1
公开(公告)日：1996-10-23
申请号：EP95934261.0
申请日：1995-10-31
CPC分类号： H04W84/025 , H04W88/022 , Y02D70/00
摘要： A selective call system including a system controller, a base station transceiver and a plurality of secondary stations with receivers and low powered transmitters capable of sending spread spectrum signals. Invitations are issued to the secondary stations by the system controller at varying power levels. Only those secondary stations receiving the invitation signal are able to respond. Those secondary stations too far away cannot respond to a low power invitation, and since each secondary station can only respond once, upon a received invitation of increased power, such outer lying secondary stations can respond without interference from closer lying secondary stations.
摘要翻译： 一种选择性呼叫系统，包括系统控制器，基站收发机和具有接收机的多个次站以及能够发送扩频信号的低功率发射机。 系统控制器以不同的功率级别向辅站发出邀请。 只有那些接收到邀请信号的次站能够做出响应。 太平洋的这些次要站不能响应低功率的邀请，并且由于每个次站只能响应一次，所以在接收到的增加的功率的邀请下，这样的外部位于的二级站可以不受更靠近的位置的次站的干扰而做出响应。
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公开(公告)号：EP0738452B1
公开(公告)日：2002-06-19
申请号：EP95934261.9
申请日：1995-10-31
CPC分类号： H04W84/025 , H04W88/022 , Y02D70/00
摘要： A selective call system including a system controller, a base station transceiver and a plurality of secondary stations with receivers and low powered transmitters capable of sending spread spectrum signals. Invitations are issued to the secondary stations by the system controller at varying power levels. Only those secondary stations receiving the invitation signal are able to respond. Those secondary stations too far away cannot respond to a low power invitation, and since each secondary station can only respond once, upon a received invitation of increased power, such outer lying secondary stations can respond without interference from closer lying secondary stations.
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公开(公告)号：EP0809892A1
公开(公告)日：1997-12-03
申请号：EP96937464.0
申请日：1996-11-25
CPC分类号： H04W84/025 , H04B1/707
摘要： A method of reducing computation in spread spectrum signals in which a spread spectrum signal sent by a transmitting station (SS1) includes a group and an individual identity code. A receiver (10, 12) stores the received signals based on their group codes and analyses the stored signals on a group by group basis. This greatly reduces this computation required when recovering individual messages from a number of simultaneously transmitted spread spectrum signals. Optionally the transmitting station may send the group and individual identity code signals simultaneously as quadrature signals.
摘要翻译： 一种减少扩频信号中的计算的方法，其中发射台（SS1）发送的扩频信号包括一个组和一个单独的识别码。 接收器（10,12）基于它们的组代码存储所接收的信号，并逐组地分析所存储的信号。 这大大减少了从多个同时传输的扩频信号恢复单个消息时所需的计算量。 可选地，发射台可以同时发送群组和个人身份代码信号作为正交信号。
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4.发明授权METHOD AND SYSTEM FOR TRANSMITTING MESSAGES IN AN ANSWER-BACK PAGING SYSTEM 失效方法和系统NACHRICHTENUBERTRAGUNG的寻呼系统JERK留言
公开(公告)号：EP0842589B1
公开(公告)日：2004-05-12
申请号：EP97917384.6
申请日：1997-05-06
IPC分类号： H04Q7/12
CPC分类号： H04W84/025
摘要： A method of transmitting messages in an answer-back paging system in which a primary station (10, 14, 16) transmits a series of messages addressed to respective secondary stations (20) on a down-link. The primary station then invites the secondary stations to transmit their responses, for example as CDMA signals, on an up-link. On receipt the primary station analyzes those responses which are deemed to be intelligible, matches them to the originally transmitted messages and transmits acknowledgements to the relevant secondary stations. The primary station then issues another invitation to those stations whose responses had not been detected requesting them to reply on the up-link. Those responses which are deemed intelligible are processed as before and acknowledgements are transmitted together with another invitation on the down-link. The cycle of operations is repeated until either a predetermined number of cycles have elapsed or it is considered that all the intelligible responses have been received. The method can be adapted to include handling requests for service as well as handling responses to messages sent on the down-link.
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公开(公告)号：EP0857306A1
公开(公告)日：1998-08-12
申请号：EP97926171.0
申请日：1997-06-26
CPC分类号： G01S19/235 , G01S19/05
摘要： A combination of a GPS receiver (52) and a communications receiver (22) or transceiver (22, 46) which share a processor (26) in the communications receiver in order to handle normal communications traffic and to determine the position of the secondary station (SS). In order to reduce the acquisition time and current consumed by the secondary station (SS), a primary station (PS) of the communication system is also equipped with a GPS receiver (14) and digital baseband processor (15) for recovering at least the ephemeris data transmitted by orbiting GPS satellites (SAT1 to SAT4), the ephemeris data being down-loaded to the secondary station (SS) and stored in a memory (32) ready for use when a positional fix is required.
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6.发明公开METHOD AND SYSTEM FOR TRANSMITTING MESSAGES IN AN ANSWER-BACK PAGING SYSTEM 失效方法和系统NACHRICHTENUBERTRAGUNG的寻呼系统JERK留言
公开(公告)号：EP0842589A2
公开(公告)日：1998-05-20
申请号：EP97917384.0
申请日：1997-05-06
IPC分类号： H04W84
CPC分类号： H04W84/025
摘要： A method of transmitting messages in an answer-back paging system in which a primary station (10, 14, 16) transmits a series of messages addressed to respective secondary stations (20) on a down-link. The primary station then invites the secondary stations to transmit their responses, for example as CDMA signals, on an up-link. On receipt the primary station analyzes those responses which are deemed to be intelligible, matches them to the originally transmitted messages and transmits acknowledgements to the relevant secondary stations. The primary station then issues another invitation to those stations whose responses had not been detected requesting them to reply on the up-link. Those responses which are deemed intelligible are processed as before and acknowledgements are transmitted together with another invitation on the down-link. The cycle of operations is repeated until either a predetermined number of cycles have elapsed or it is considered that all the intelligible responses have been received. The method can be adapted to include handling requests for service as well as handling responses to messages sent on the down-link.
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公开(公告)号：EP0740887A1
公开(公告)日：1996-11-06
申请号：EP95934798.0
申请日：1995-11-08
CPC分类号： H04B1/707
摘要： A communications system comprising a primary station (10) having transmitting and receiving means (12), means for formatting messages to be transmitted by the transmitting means, and one or more secondary stations (SS1, SS2), the or each secondary station having receiving means for receiving messages from the primary station and means for transmitting signals as spread spectrum signals, said receiving means in the primary station being adapted to receive and decode the or each of the spread signals. Frequency offsets in the simultaneously received spread spectrum signals are dealt with by digitising the received signals to produce raw data samples which are despread, frequency analysed and the spectrums derived are scanned for peaks exceeding a predetermined threshold and the outputs indicate the presence or absence of codes.
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8.发明授权METHOD AND SYSTEM FOR PROVIDING ACKNOWLEDGEMENT IN A 2-WAY MESSAGING SYSTEM 失效方法和系统RÜCKQUITTING在两路系统新闻
公开(公告)号：EP0885536B1
公开(公告)日：2005-03-30
申请号：EP97940283.1
申请日：1997-09-26
IPC分类号： H04Q7/12
CPC分类号： H04W84/025 , H04W88/022
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公开(公告)号：EP0809892B1
公开(公告)日：2004-03-24
申请号：EP96937464.4
申请日：1996-11-25
CPC分类号： H04W84/025 , H04B1/707
摘要： A method of reducing computation in spread spectrum signals in which a spread spectrum signal sent by a transmitting station (SS1) includes a group and an individual identity code. A receiver (10, 12) stores the received signals based on their group codes and analyses the stored signals on a group by group basis. This greatly reduces this computation required when recovering individual messages from a number of simultaneously transmitted spread spectrum signals. Optionally the transmitting station may send the group and individual identity code signals simultaneously as quadrature signals.
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公开(公告)号：EP0981850A2
公开(公告)日：2000-03-01
申请号：EP98950262.0
申请日：1998-11-09
发明人： BURBRIDGE, Richard, Charles , ROBERTS, David, Keith , JAMIESON, Philip, Anthony , GIBSON, Rodney, William
IPC分类号： H02J1/00
CPC分类号： H04W52/0212 , H04B1/126 , H04W52/0229 , H04W52/0238 , H04W88/022 , Y02D70/40
摘要： For battery economizing in a receiving station (CU) having a radio identity code (RIC) consisting of M bits, a base station (MIU) transmits a wake-up message consisting of at least two repetitions of a wake-up sequence having N concatenated parts. Each of the N parts includes a sync code word and a different fraction M/N of bits of a radio identity code (RIC). The receiving station is energized intermittently in order to detect carrier and at least one of the N parts. In response to detecting that one of the N parts is received, the receiving station remains energized and analyzes at least the detected one of the N parts. If the received bits of the transmitted radio identity code do not correspond to the corresponding bits of the receiving station's radio identity code, the receiving station reverts to intermittent energization, otherwise it remains energized to receive a message appended to the transmitted radio identity code. Each of the parts may be appended to a different sync code word identifying the part thereby enabling address identification to be carried out on only that one of the parts. The bits of the transmitted radio identity code may be scrambled prior to being fractionalized into the N parts.
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