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公开(公告)号：EP1366591A2
公开(公告)日：2003-12-03
申请号：EP02706481.5
申请日：2002-03-04
发明人： LAROIA, Rajiv , LI, Junyi , PARIZHSKY, Vladimir
IPC分类号： H04L7/033
CPC分类号： H04W56/0045 , H04L5/023 , H04L7/0334 , H04L27/2646 , H04L27/2662 , H04W56/0005
摘要： Symbol timing synchronization in OFDM communication systems where multiple wireless terminals communicate with a single base station is described. Base station transmitter and receiver symbol timing is fixed. Each wireless terminal operates to independently adjust its transmitter timing. Transmitter timing synchronization at the wireless terminal is slaved to the terminal's receiver timing synchronization. each wireless terminal first corrects its receiver symbol timing based on a signal received from the base station. The wireless terminal then adjusts its transmitter symbol timing as a function of its receiver symbol timing. When the receiver symbol timing is to be advanced or delayed by some amount, the transmitter symbol timing is also advanced or delayed, respectively, by the same, or substantially the same, amount. Symbol timing adjustment can be made by adding or deleting digital samples from the first or last symbol in a dwell.
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2.发明公开WIRELESS TERMINAL METHODS AND APPARATUS FOR USE IN WIRELESS COMMUNICATIONS SYSTEMS SUPPORTING DIFFERENT SIZE FREQUENCY BANDS 有权方法和设备的无线DEVICES FOR USE IN无线通信系统与各大频段的支持
公开(公告)号：EP1810431A2
公开(公告)日：2007-07-25
申请号：EP05804360.5
申请日：2005-10-12
发明人： LAROIA, Rajiv , LI, Junyi , PARIZHSKY, Vladimir
IPC分类号： H04J11/00
CPC分类号： H04L27/2601
摘要： More efficient utilization of available bandwidth is implemented in an OFDM wireless communication system. The partitions of bandwidth may be of different sizes and may be different from the original system design parameters. Basic system structure such as the number of tones used and the number of OFDM symbol times in a slot is maintained throughout the system. Bandwidth is varied by adjusting the inter-tone spacing or bandwidth associated with a single tone. As the inter-tone spacing is increased, the OFDM symbol transmission time is decreased following an inverse proportional relationship. A wireless communications device, during a first period of time transmits signals using a first uplink frequency band of a first number of uniformly distributed tones and during a second period of time transmits signals using a second uplink frequency band of a second number of uniformly distributed tones, the second number being the same as the first number, the second frequency band being wider than the first frequency band.
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3.发明公开COMMUNICATIONS METHOD AND APPARATUS USING PHYSICAL ATTACHMENT POINT IDENTIFIERS 审中-公开KOMMUNIKATIONSVERFAHREN UND -VORRICHTUNG麻省理工学院BEFESTIGUNGSPUNKT-IDENTIFIKATOREN
公开(公告)号：EP1964430A1
公开(公告)日：2008-09-03
申请号：EP06845800.9
申请日：2006-12-20
摘要： Methods and apparatus for routing messages between an end node and an access node via another access node are described. Physical layer identification information is used when identifying a remote, e.g., adjacent, access node as a message destination. Thus, when a connection identifier based on one or more physical layer identifiers is available to a wireless terminal, e.g., from one or more downlink signals received from a destination access node, the wireless terminal can use the connection identifier corresponding to the destination node to route a message via an access node with which it has an established uplink connection. Such connection identifier information can be used even when other addressing information, e.g., network layer address information, associated with the destination access node, may not be available to the wireless terminal.
摘要翻译： 描述了通过另一接入节点在终端节点和接入节点之间路由消息的方法和装置。 当识别远程例如相邻的接入节点作为消息目的地时，使用物理层标识信息。 因此，当基于一个或多个物理层标识符的连接标识符可用于无线终端时，例如，从一个或多个从目的地接入节点接收的下行链路信号，无线终端可以使用与目的地节点对应的连接标识符 通过其具有建立的上行链路连接的接入节点路由消息。 即使当与目的地接入节点相关联的其他寻址信息（例如网络层地址信息）对于无线终端可能不可用时，也可以使用这种连接标识符信息。
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公开(公告)号：EP1964339A1
公开(公告)日：2008-09-03
申请号：EP06847976.5
申请日：2006-12-20
发明人： LAROIA, Rajiv , ANIGSTEIN, Pablo , MAZIK, David, R. , PARIZHSKY, Vladimir , PARK, Vincent , SRINIVASAN, Murari , TSIRTSIS, George
IPC分类号： H04L12/56
CPC分类号： H04W8/005 , H04L41/069 , H04L45/02 , H04L45/28
摘要： Methods and apparatus for using end nodes, e.g., wireless terminals, to discover base stations and communicate information about discovered access nodes, e.g., base stations, to other access nodes in a system are described. As the wireless terminal roams in the system and new access nodes are encountered, one or more physically adjacent access nodes will be informed of the presence of the new access node as a result of communications with the wireless terminal. A message indicating an access node's inability to route a message to another access node which is known to a wireless terminal may trigger the wireless terminal to begin the process of updating access node routing and neighbor information.
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5.发明公开
公开(公告)号：EP1964338A2
公开(公告)日：2008-09-03
申请号：EP06847975.7
申请日：2006-12-20
IPC分类号： H04L12/56
摘要： Methods and apparatus for routing messages between an end node and an access node via another access node are described. Physical layer identification information is used when identifying a remote, e.g., adjacent, access node as a message destination. Thus, when a connection identifier based on one or more physical layer identifiers is available to a wireless terminal, e.g., from one or more downlink signals received from a destination access node, the wireless terminal can use the connection identifier corresponding to the destination node to route a message via an access node with which it has an established uplink connection. Such connection identifier information can be used even when other addressing information, e.g., network layer address information, associated with the destination access node, may not be available to the wireless terminal.
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6.发明公开METHODS AND APPARATUS FOR ADJUSTING BAND WIDTH ALLOCATION IN A WIRELESS COMMUNICATIONS SYSTEM 审中-公开方法和设备配置带宽分配在无线通信系统
公开(公告)号：EP1810430A1
公开(公告)日：2007-07-25
申请号：EP05804327.4
申请日：2005-10-12
发明人： LAROIA, Rajiv , LI, Junyi , PARIZHSKY, Vladimir
CPC分类号： H04L27/2602 , H04L5/0042
摘要： More efficient utilization of available bandwidth is implemented in an OFDM wireless communication system. The partitions of bandwidth may be of different sizes and may be different from the original system design parameters. Basic system structure such as the number of tones used and the number of OFDM symbol times in a slot is maintained throughout the system. Bandwidth is varied by adjusting the inter-tone spacing or bandwidth associated with a single tone. As the inter-tone spacing is increased, the OFDM symbol transmission time is decreased following an inverse proportional relationship. A first base station transmitter transmits signals on a first number of tones distributed uniformly in a first frequency band (1202), and a second base station transmitter transmits signals on a second number of tones distributed uniformly in a second frequency band which is wider than the first frequency band, the second number of tones being the same as the first number of tones (1204). The first and second base stations support handoffs of mobile nodes between to each other (1216).
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7.发明公开IMPROVED BEACON SIGNALS FACILITATING SIGNAL DETECTION AND TIMING SYNCHRONIZATION 审中-公开改进的信标信号，以方便用于时间同步的认可和信号
公开(公告)号：EP1807953A2
公开(公告)日：2007-07-18
申请号：EP05824371.8
申请日：2005-10-14
IPC分类号： H04J3/06
CPC分类号： H04L27/2613 , H04L5/0053 , H04L7/04
摘要： Improved beacon signaling methods are described. Beacon signals are transmitted on the same tone in at least two consecutive symbol periods facilitating accurate energy measurements over a symbol period even if timing synchronization with the transmitter is not maintained. A low power wideband signal is also combined with the beacon signal to facilitate channel estimation and other operation such as timing synchronization operations.
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公开(公告)号：EP1366591B1
公开(公告)日：2006-11-15
申请号：EP02706481.5
申请日：2002-03-04
发明人： LAROIA, Rajiv , LI, Junyi , PARIZHSKY, Vladimir
IPC分类号： H04L7/033
CPC分类号： H04W56/0045 , H04L5/023 , H04L7/0334 , H04L27/2646 , H04L27/2662 , H04W56/0005
摘要： Symbol timing synchronization in OFDM communication systems where multiple wireless terminals communicate with a single base station is described. Base station transmitter and receiver symbol timing is fixed. Each wireless terminal operates to independently adjust its transmitter timing. Transmitter timing synchronization at the wireless terminal is slaved to the terminal's receiver timing synchronization. each wireless terminal first corrects its receiver symbol timing based on a signal received from the base station. The wireless terminal then adjusts its transmitter symbol timing as a function of its receiver symbol timing. When the receiver symbol timing is to be advanced or delayed by some amount, the transmitter symbol timing is also advanced or delayed, respectively, by the same, or substantially the same, amount. Symbol timing adjustment can be made by adding or deleting digital samples from the first or last symbol in a dwell.
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