-
公开(公告)号：EP1479214A1
公开(公告)日：2004-11-24
申请号：EP03742636.8
申请日：2003-02-17
IPC分类号： H04L29/06
CPC分类号： H04L63/0428 , G06F21/10 , H04L2463/101
摘要： A method and system modifies one or more control signals that are associated with the transmission or reception of copy-protected material. By modifying the control signals, most communication devices that rely on the protocol will prevent the transmission of the message, or will prevent or inhibit the subsequent processing or relaying of a received message. For example, if a cyclic-redundancy-code (CRC) is modified, a conventional network device that uses the received-but-modified CRC will likely reject the received material, thereby preventing it from being processed or transmitted further through the network. Select devices are configured to recognize and undo the modification, thereby allowing the material to be further processed. If the material is to be relayed, the modification is reapplied. Preferably, only local-area network devices are configured to undo the modification, while devices that provide wide-area network access are not configured to undo the modification. In this manner, protected content material with modified control signals is likely to be prevented from wide-area network distribution.
-
2.发明公开METHOD AND ARRANGEMENT FOR WIRELESS COMMUNICATION OF SIGNALS IN A MR SYSTEM 审中-公开方法和系统信号准IN A MR系统无线传输
公开(公告)号：EP1966621A2
公开(公告)日：2008-09-10
申请号：EP06842625.3
申请日：2006-12-20
发明人： VAN HELVOORT, Marinus, J., A., M. , BENNETT, Jeff , SAES, Marc, P. , DE VRIES, Bert, L. , DEN BOEF, Johannes, H. , KLEIHORST, Robert, P. , BIRRU, Dagnachew
IPC分类号： G01R33/28
CPC分类号： G01R33/283 , G01R33/3692 , G01R33/56383
摘要： A method and an arrangement for uni- or bidirectional wireless communication of signals or data especially in a reflective environment like a MR imaging system, between at least one first transmitter and/or receiver unit (501, 601, 701; T/R1) and at least one second transmitter and/or receiver unit (801; T/R2) is disclosed. The reliability and availability of the communication link especially in a highly reflective environment is improved especially by using spread spectrum technology and ultra wide band carrier frequencies.
-
3.发明公开METHOD FOR CLOCK SYNCHRONIZATION OF WIRELESS 1394 BUSES FOR NODES CONNECTED VIA IEEE 802.11 LAN 有权方法进行时钟同步WIRELESS 1394辆大客车OVER IEEE 802.11 LAN网络节点相关
公开(公告)号：EP1642408A1
公开(公告)日：2006-04-05
申请号：EP04744407.0
申请日：2004-06-24
发明人： BENNETT, Jeff
CPC分类号： H04W56/0015 , H04B7/269 , H04J3/0673 , H04J3/0697 , H04W56/00 , H04W84/12
摘要： A method and apparatus for providing clock synchronization of 1394 buses having wireless devices utilizing 802.11 communication with computers attached to one or more 1394 buses, includes the steps of (a) synchronizing an internal time base of a wireless master device attached to a first bus by receiving a Software Beacon Alert that indicates a time of a subsequent transmission, applying the Software Beacon Alert to a first phase-lock loop circuit associated with the master device to create a filtered Software Beacon Alert. The first phase-lock loop circuit is unsymmetrical about zero error. A timing message is transmitted from the master device to a second phase-lock loop circuit associated with at least one slave device. The timing message must be sent to the at least one slave device before the master device receives a subsequent Software Beacon Alert message, so that the wireless master device and the at least one slave device are synchronized, even though they are on different buses. This invention allows 1394 devices having wireless means to communicate over an 802.11 WLAN network, so that communications can be synchronized between the master and slave device across 1394 serial buses.
-
4.发明公开METHOD AND SYSTEM FOR GENERATING MULTIPLE SELF-ID PACKETS ON THE 1394 BUS USING A STANDARD PHY CHIP 审中-公开方法和产生系统几个“SELF-ID”包的1394总线与标准的PHY芯片
公开(公告)号：EP1360807A1
公开(公告)日：2003-11-12
申请号：EP02711161.6
申请日：2002-02-18
发明人： BENNETT, Jeff
IPC分类号： H04L12/64
CPC分类号： H04L12/40078 , H04L12/64 , Y10S370/912
摘要： A method and system for generating multiple self-ID packets that are used for mapping a node topology is disclosed. The node topology is based on a computer system comprised of a high performance serial bus (11) and a plurality of nodes NOD1, NOD2, ....., NODn coupled to the serial bus. Each node further includes an identification packet that is utilized for self-identifying itself on a network. In particular, a plurality of self-ID packets associated with the hardware actually present on the bus (11) as well as a plurality of virtual nodes VNOD1,.....VNODn that are not actually present are generated during a self-ID process. Then, these self-ID packets are forwarded over the serial bus to identify themselves to other remaining nodes in the network. Thereafter, a topology mapping table from all of the self-ID packets is generated.
-
5.发明授权METHOD FOR CLOCK SYNCHRONIZATION OF WIRELESS 1394 BUSES FOR NODES CONNECTED VIA IEEE 802.11 LAN 有权方法进行时钟同步WIRELESS 1394个总线超过IEEE 802.11 LAN网络节点相关
公开(公告)号：EP1642408B1
公开(公告)日：2007-04-18
申请号：EP04744407.0
申请日：2004-06-24
发明人： BENNETT, Jeff
CPC分类号： H04W56/0015 , H04B7/269 , H04J3/0673 , H04J3/0697 , H04W56/00 , H04W84/12
摘要： A method and apparatus for providing clock synchronization of 1394 buses having wireless devices utilizing 802.11 communication with computers attached to one or more 1394 buses, includes the steps of (a) synchronizing an internal time base of a wireless master device attached to a first bus by receiving a Software Beacon Alert that indicates a time of a subsequent transmission, applying the Software Beacon Alert to a first phase-lock loop circuit associated with the master device to create a filtered Software Beacon Alert. The first phase-lock loop circuit is unsymmetrical about zero error. A timing message is transmitted from the master device to a second phase-lock loop circuit associated with at least one slave device. The timing message must be sent to the at least one slave device before the master device receives a subsequent Software Beacon Alert message, so that the wireless master device and the at least one slave device are synchronized, even though they are on different buses. This invention allows 1394 devices having wireless means to communicate over an 802.11 WLAN network, so that communications can be synchronized between the master and slave device across 1394 serial buses.
-
6.发明授权
公开(公告)号：EP1518356B1
公开(公告)日：2006-11-22
申请号：EP03760838.7
申请日：2003-06-12
发明人： BENNETT, Jeff
CPC分类号： H04L12/40052 , H04L12/6418 , H04L43/0864 , H04L43/10 , H04L43/106 , H04L43/50 , H04L47/10 , H04L47/13 , H04L47/283
摘要： In lieu of a strictly dedicated bus transaction such as a ping and self-identification, the timing delays for an IEEE 1394 serial bus are determined by an asynchronous transaction request and responsive acknowledgement response. Timing may therefore be determined either from asynchronous transactions occurring for other purposes (e.g., a read or write) or initiated for the purpose of determining timing.
-
7.发明公开THE USE OF PSEUDO-RANDOM FREQUENCY SEQUENCE TO REDUCE PICO-NET INTERFERENCE IN A MULTI-BAND UWB NETWORK 审中-公开使用伪随机频率跟随多带UWB网络的PICONETZINTERFERENZ为了减少
公开(公告)号：EP1597834A2
公开(公告)日：2005-11-23
申请号：EP04709293.7
申请日：2004-02-09
发明人： BIRRU, Dagnachew , BENNETT, Jeff
IPC分类号： H04B1/69
CPC分类号： H04B1/7176 , H04B1/713 , H04B1/719
摘要： A wireless communication system and method is provided that uses a pseudo-random frequency sequence to reduce pico-net interference in a multi-band ultra wideband network. Pulse are transmitted using a pseudo-random sequence of frequencies such that neighboring pico-nets using the same technique can reduce band overlap thereby reducing mutual interference.
-
8.发明公开A METHOD TO MEASURE TRANSMISSION DELAY BETWEEN 1394 BRIDGES 有权系统与Verfahren zur Messung derÜbertragungsverzögerungzwischen 1394-Brücken
公开(公告)号：EP1518356A1
公开(公告)日：2005-03-30
申请号：EP03760838.7
申请日：2003-06-12
发明人： BENNETT, Jeff
CPC分类号： H04L12/40052 , H04L12/6418 , H04L43/0864 , H04L43/10 , H04L43/106 , H04L43/50 , H04L47/10 , H04L47/13 , H04L47/283
摘要： In lieu of a strictly dedicated bus transaction such as a ping and self-identification, the timing delays for an IEEE 1394 serial bus are determined by an asynchronous transaction request and responsive acknowledgement response. Timing may therefore be determined either from asynchronous transactions occurring for other purposes (e.g., a read or write) or initiated for the purpose of determining timing.
摘要翻译： 作为严格专用的总线事务（例如ping和自识别），IEEE 1394串行总线的定时延迟由异步事务请求和响应确认响应确定。 因此，可以由出于其他目的的异步事务（例如，读或写）来确定定时，或者为了确定时序而启动定时。
-
-
-
-
-
-
-
搜索结果
8 条记录 (耗时 0.01 秒)
