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1.发明授权SPREAD SPECTRUM RANDOM ACCESS SYSTEMS AND METHODS FOR TIME DIVISION MULTIPLE ACCESS RADIOTELEPHONE COMMUNICATIONS SYSTEMS 失效方法和系统与频带扩展与多址无线电话信息传输系统IN TIME区域的多个ACCESS
公开(公告)号：EP0893013B1
公开(公告)日：2003-11-26
申请号：EP97921098.6
申请日：1997-04-03
申请人： ERICSSON INC.
摘要： In a time division multiple access (TDMA) radiotelephone communications system, a spread spectrum random access channel signal representing a random access message is communicated from a radiotelephone to a central station according to a spreading sequence. In response, a TDMA radiotelephone communications channel is assigned to the radiotelephone. A time division multiplexed radiotelephone communications signal is communicated between the radiotelephone and the central station on the assigned TDMA radiotelephone communications channel over a time division multiplexed carrier frequency band. Preferably, in communicating the spread spectrum random access channel signal, a random access channel signal, representing the random access channel message, is direct sequence modulated according to the spreading sequence to produce a direct sequence modulated random access channel signal. According to a two-stage detection aspect, a synchronization sequence may be associated with a plurality of spreading sequences. The synchronization sequence may be first detected from the communicated spread spectrum random access channel signal, and in response to detection of the synchronization sequence, one of the plurality of spreading sequences associated with the detected synchronization sequence may be detected. A station identification may be assigned to the radiotelephone, with the station identification preferably represented by a digital station identification word. The synchronization sequence and the spreading sequence may be identified from the station identification word, thus associating the synchronization and spreading sequences. The spreading sequence may also be randomly generated from the station identification word.
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2.发明授权SYSTEMS AND METHODS FOR RANDOM ACCESS IN TIME DIVISION MULTIPLE ACCESS SATELLITE RADIOTELEPHONE COMMUNICATIONS 失效DEVICE AND METHOD FOR随机访问以卫星为基础的TDMA无线电话通讯，
公开(公告)号：EP0893012B1
公开(公告)日：2001-09-05
申请号：EP97920120.9
申请日：1997-04-03
申请人： ERICSSON INC.
发明人： HASSAN, Amer , RAMESH, Rajaram , REINHOLD, Stanley, L. , MASSENGILL, Larry, W. , WANG, Eric, Yi-Pin
IPC分类号： H04B7/212
CPC分类号： H04B7/212 , H04W74/0866
摘要： In a time division mutiple access (TDMA) satellite radiotelephone communications system, a radiotelephone communicates random access channel radiotelephone communications signals to a satellite over a dedicated random access channel uplink carrier frequency band. In response, a time division mutiple access channel on a time division multiplexed uplink carrier frequency band different from the dedicated random access channel uplink carrier frequency band is assigned. The radiotelephone communicates time division multiplexed radiotelephone communications signals to the satellite over the allocated time division multiple access channel. Random access channel radiotelephone communications signals may be communicated to the satellite from a first radiotelephone over a first dedicated random access channel uplink carrier frequency band or from a second radiotelephone over a second dedicated random access channel uplink carrier frequency band different from said first dedicated random access channel uplink carrier frequency band. For a system in which the satellite communicates radiotelephone communications signals to radiotelephones located in a first coverage area and communicates radiotelephone communications signals to radiotelephones located in a second coverage area, random access channel radiotelephone communications signals may be communicated over a first dedicated random access uplink carrier frequency band if the radiotelephone is located in the first coverage area or communicating random access radiotelephone communications signals over a second dedicated random access channel uplimk carrier frequency band different from the first dedicated random access uplink carrier band if the radiotelephone is located in the second coverage area.
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公开(公告)号：EP0897623A1
公开(公告)日：1999-02-24
申请号：EP97923657.0
申请日：1997-04-25
申请人： Ericsson Inc.
CPC分类号： H04B7/18578
摘要： A communication system provides efficient satellite communication in rural, remote, or sparsely populated areas, or in areas lacking a conventional telephone infrastructure, or in special purpose uses such as airport coverage. Subscribers in such areas communicate with the satellite via a simple, highly modular entry node located in a local area to be served. Subscriber units provide subscribers with access to the system. The subscriber units are connected to the entry node via local access loops provided by point-to-point wireless links between the subscriber units and the entry node. The entry node internally switches local traffic among subscribers and connects traffic to outside circuits, via wireless links with the satellite, as appropriate. The outside circuits are provided by the cooperative working of the satellite, an entry-node controller, and an earth station. The wireless links between the satellite and the entry node and the local access loops may operate at the same or different frequencies. If they operate at different frequencies, a frequency translator in the entry-node controller matches the different frequencies. A subscriber unit may be used to provide the subscribers with access to the system such that speech compression and decompression takes place in the subscriber unit itself to avoid the effects of tandem coder/decoders.
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4.发明公开SYSTEMS AND METHODS FOR RANDOM ACCESS IN TIME DIVISION MULTIPLE ACCESS SATELLITE RADIOTELEPHONE COMMUNICATIONS 失效DEVICE AND METHOD FOR随机访问以卫星为基础的TDMA无线电话通讯，
公开(公告)号：EP0893012A2
公开(公告)日：1999-01-27
申请号：EP97920120.0
申请日：1997-04-03
申请人： ERICSSON INC.
发明人： HASSAN, Amer , RAMESH, Rajaram , REINHOLD, Stanley, L. , MASSENGILL, Larry, W. , WANG, Eric, Yi-Pin
CPC分类号： H04B7/212 , H04W74/0866
摘要： In a time division mutiple access (TDMA) satellite radiotelephone communications system, a radiotelephone communicates random access channel radiotelephone communications signals to a satellite over a dedicated random access channel uplink carrier frequency band. In response, a time division mutiple access channel on a time division multiplexed uplink carrier frequency band different from the dedicated random access channel uplink carrier frequency band is assigned. The radiotelephone communicates time division multiplexed radiotelephone communications signals to the satellite over the allocated time division multiple access channel. Random access channel radiotelephone communications signals may be communicated to the satellite from a first radiotelephone over a first dedicated random access channel uplink carrier frequency band or from a second radiotelephone over a second dedicated random access channel uplink carrier frequency band different from said first dedicated random access channel uplink carrier frequency band. For a system in which the satellite communicates radiotelephone communications signals to radiotelephones located in a first coverage area and communicates radiotelephone communications signals to radiotelephones located in a second coverage area, random access channel radiotelephone communications signals may be communicated over a first dedicated random access uplink carrier frequency band if the radiotelephone is located in the first coverage area or communicating random access radiotelephone communications signals over a second dedicated random access channel uplimk carrier frequency band different from the first dedicated random access uplink carrier band if the radiotelephone is located in the second coverage area.
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公开(公告)号：EP0934635B1
公开(公告)日：2002-02-27
申请号：EP97912927.7
申请日：1997-10-22
申请人： ERICSSON INC.
IPC分类号： H04B7/15
CPC分类号： H04B7/18563
摘要： A satellite-cellular communication system includes a satellite based transceiver for transceiving two-way communications originated at a user terminal. As a part of call set up, controller determines whether the user terminal should transmit in the uplink in either a wide band mode of operation or in a narrow band mode of operation. The controller then specifies to the user terminal the mode of operation through the transceiver. Whether the user terminal transmits in the uplink in a wide band or in a narrow band mode depends upon factors including the type of device, channel usage and efficiency in the channels to and from the satellite transceiver and the signal quality of the signals received at the transceiver.
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6.发明授权ANTENNA SYSTEM FOR DUAL MODE SATELLITE/CELLULAR PORTABLE PHONE 失效天线系统FOR TWO手机FASHIONS卫星和ZELLULARGEBRAUCH
公开(公告)号：EP0876711B1
公开(公告)日：2001-05-02
申请号：EP97903857.7
申请日：1997-01-15
申请人： ERICSSON INC.
发明人： HASSAN, Amer , REINHOLD, Stanley, L. , HAYES, Gerard, James , MacDONALD, James, D., Jr. , MA, Yawei
摘要： A portable phone capable of operating in cellular and satellite modes of communication is disclosed as including a main housing, circuitry located within the main housing for operating the portable phone in the cellular mode, circuitry located within the main housing for operating the portable phone in the satellite mode, a first antenna coupled to the cellular circuitry for receiving and transmitting signals in the cellular mode, and a second antenna coupled to the satellite circuitry for receiving and transmitting signals in the satellite mode. The second antenna can either be mounted to the main housing of the portable phone or housed within a flip cover coupled to the main housing. If provided, the flip cover is coupled to the main housing so as to be rotatable about a first axis and a second axis substantially perpendicular thereto. The first antenna may extend from the main housing, be printed on a surface of the flip cover, or be housed within the flip cover adjacent the second antenna.
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7.发明授权METHOD AND APPARATUS FOR MOBILE STATION-TO-MOBILE STATION CALLS IN A MOBILE SATELLITE COMMUNICATIONS SYSTEM WITH ON-BOARD TDMA FORMAT CONVERSION 失效方法和装置用于呼叫移动站到另一个在船上TDMA格式变换的移动卫星通信装置，它
公开(公告)号：EP0813775B1
公开(公告)日：1999-09-08
申请号：EP96908521.6
申请日：1996-03-08
申请人： Ericsson Inc.
IPC分类号： H04B7/185
CPC分类号： H04B7/18515
摘要： A method and apparatus for mobile station-to-mobile station communications in a mobile satellite communications system using an asymmetrical TDMA format is presented. According to the present invention, a first mobile station broadcasts a first signal to an orbiting satellite using a first TDMA format. The satellite receives the first signal, maps the first TDMA format to a second TDMA format and broadcasts a second signal having a second TDMA format to a second mobile station.
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公开(公告)号：EP0897623B1
公开(公告)日：2001-10-31
申请号：EP97923657.7
申请日：1997-04-25
申请人： Ericsson Inc.
IPC分类号： H04B7/185
CPC分类号： H04B7/18578
摘要： A communication system provides efficient satellite communication in rural, remote, or sparsely populated areas, or in areas lacking a conventional telephone infrastructure, or in special purpose uses such as airport coverage. Subscribers in such areas communicate with the satellite via a simple, highly modular entry node located in a local area to be served. Subscriber units provide subscribers with access to the system. The subscriber units are connected to the entry node via local access loops provided by point-to-point wireless links between the subscriber units and the entry node. The entry node internally switches local traffic among subscribers and connects traffic to outside circuits, via wireless links with the satellite, as appropriate. The outside circuits are provided by the cooperative working of the satellite, an entry-node controller, and an earth station. The wireless links between the satellite and the entry node and the local access loops may operate at the same or different frequencies. If they operate at different frequencies, a frequency translator in the entry-node controller matches the different frequencies. A subscriber unit may be used to provide the subscribers with access to the system such that speech compression and decompression takes place in the subscriber unit itself to avoid the effects of tandem coder/decoders.
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9.发明授权RETRACTABLE RADIOTELEPHONE ANTENNAS AND ASSOCIATED RADIOTELEPHONE COMMUNICATION METHODS 失效伸缩收音机天线相关的无线电电话通讯方法
公开(公告)号：EP0947032B1
公开(公告)日：2001-08-08
申请号：EP97951699.4
申请日：1997-12-04
申请人： ERICSSON INC.
摘要： A multi-piece retractable radiotelephone antenna and associated communication method is employed to provide improved signal quality. The multi-piece antenna includes conductive windings, such as helical quadrafillar windings, disposed separately on two slidably cooperating substrate members. The antenna is mechanically extended to a deploy position and the separate windings are electrically connected thereby doubling the effective electrical length of the antenna.
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10.发明公开METHOD AND APPARATUS FOR ENABLING MOBILE-TO-MOBILE CALLS IN A COMMUNICATION SYSTEM 失效方法和设备移动到移动电话中的通信装置
公开(公告)号：EP0917773A2
公开(公告)日：1999-05-26
申请号：EP97936098.0
申请日：1997-07-23
申请人： Ericsson, Inc.
CPC分类号： H04B7/18532 , H04B7/18558 , H04B7/18565
摘要： A communication system is disclosed which reduces loop delay when a first wireless phone calls a second wireless phone wherein the first and second phones are served by the same relay station. The communication system includes a relay station for communicating with the first and second wireless phones. A transponder located in the relay station relays signals received from one mobile station on a first frequency band to another mobile station on a second frequency band. In addition, the transponder sends the received signals to a controller which controls the operation of the transponder using control information.
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