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1. 发明授权

US5187605A Optical transceiver 失效
标题翻译：光学收发器
公开(公告)号：US5187605A
公开(公告)日：1993-02-16
申请号：US754940
申请日：1991-09-04
申请人： Kiyotaka Shikata , Shinji Takao
发明人： Kiyotaka Shikata , Shinji Takao
IPC分类号： H04B10/00 , H04B10/27 , H04B10/278 , H04L12/40 , H04L12/413
CPC分类号： H04L12/40013 , H04B10/40 , H04L12/413
摘要： An optical transceiver is coupled to a U-shaped optical bus and to data terminals employing CSMA/CD. The optical transceiver includes a converter for carrying out a conversion between data to and from the data terminals and transmitting packets to be transmitted from and receiving packets to be received by the data terminals via the converter, an optical bus interface for matching the transmitting and receiving packets to the U-shaped optical bus which is used as a transmission line, a common bus which provides a data transfer path between the converter and the data terminals during transmitting and receiving operations, a transmitting packet intermission part for intermitting the transmitting packets in response to a transmission control signal, a receiving packet intermission part for intermitting the receiving packets in response to a reception control signal, and a controller for generating the transmission control signal and the reception control signal based on timings of the transmitting packet and the receiving packet, a relationship between the transmitting packet and a corresponding receiving packet which is looped back from the U-shaped optical bus, and a collision notification. The converter notifies a collision on the common bus based on an impedance of the common bus by supplying the collision notification to the controller.

2. 发明授权

US5682381A Wireless LAN system 失效
标题翻译：无线局域网系统
公开(公告)号：US5682381A
公开(公告)日：1997-10-28
申请号：US529278
申请日：1995-09-15
申请人： Osamu Sekihata , Hironobu Michiya , Kiyotaka Shikata
发明人： Osamu Sekihata , Hironobu Michiya , Kiyotaka Shikata
IPC分类号： H04L12/28 , H04B7/065
CPC分类号： H04W72/1231 , H04W24/00 , H04W72/12 , H04W74/0808 , H04W84/12
摘要： A master station detects the strength of a signal received from a slave station and, on the basis of the signal strength of the receiving signal, decides a transmission timing at which frame contained in the signal is to be sent to a backbone LAN. When the transmission timing decided arrives, the master station determines whether a carrier is present on the backbone LAN. The master station discards the frame from the slave station, and therefore does not send it, if the carrier is present. If the carrier is not present on the backbone LAN, the master station sends the frame to the backbone LAN. Thus, interference between adjacent cells does not occur even when each of a number of master stations send signals to and receive signals from a slave station by using the same channel.
摘要翻译：主站检测从从站接收的信号的强度，并且基于接收信号的信号强度，决定将信号中包含的帧发送到主干LAN的发送定时。当发送定时确定到达时，主站确定骨干LAN上是否存在载波。主站丢弃来自从站的帧，因此如果存在载波，则不发送。如果主干LAN上不存在运营商，则主站将帧发送到主干局域网。因此，即使当多个主站中的每一个通过使用相同的信道向从站发送信号并从其接收信号时，也不会发生相邻小区之间的干扰。

3. 发明授权

US5588003A LAN-WAN-LAN communication method, and apparatus for LAN-WAN connection 失效
标题翻译： LAN-WAN-LAN通信方式，LAN-WAN连接装置
公开(公告)号：US5588003A
公开(公告)日：1996-12-24
申请号：US198070
申请日：1994-02-17
申请人： Toshimitsu Ohba , Kiyotaka Shikata , Osamu Sekihata
发明人： Toshimitsu Ohba , Kiyotaka Shikata , Osamu Sekihata
IPC分类号： H04L12/46 , H04J3/16
CPC分类号： H04L12/4612
摘要： A LAN-WAN-LAN communication method and apparatus for performing communication between a LAN on a transmitting side and a LAN on a receiving side via a wide area network within limits of an allocated band includes a demultiplexer/multiplexer unit for demultiplexing data, which has been received from the LAN on the transmitting side, into data constituting the smallest units of information and transmitting this data via a plurality of lines. Then, data, which is sent to the receiving side via each line, is multiplexed on the receiving side and the multiplexed data is sent to the LAN on the receiving side. A traffic monitoring unit is provided for monitoring traffic between LANS. A band is obtained, which is required for communication between LANs based upon the traffic. Communication between LANs is performed by increasing, decreasing or maintaining the number of lines, which are used in communication between LANS, based upon the obtained band.
摘要翻译：一种LAN-WAN-LAN通信方法和装置，用于在所分配的频带的范围内，经由广域网在广播区域网络之间进行发送侧的LAN与接收侧的LAN之间的通信，包括解复用器/多路复用单元，从发送侧的LAN接收到构成最小信息单元的数据，经由多条线路发送该数据。然后，经由各个线路发送到接收侧的数据被多路复用在接收侧，并且多路复用数据被发送到接收侧的LAN。提供交通监控单元，用于监控LANS之间的通信量。获得了基于业务量的LAN之间的通信所需的频带。基于获得的频带，LAN之间的通信是通过增加，减少或维持在LANS之间的通信中使用的线数来执行的。

4. 发明授权

US5590183A Keep call back device 失效
标题翻译：保留回拨设备
公开(公告)号：US5590183A
公开(公告)日：1996-12-31
申请号：US342245
申请日：1994-11-18
申请人： Norihiro Yoneda , Toshimitsu Ohba , Reiko Furuya , Kiyotaka Shikata
发明人： Norihiro Yoneda , Toshimitsu Ohba , Reiko Furuya , Kiyotaka Shikata
IPC分类号： H04M3/42 , H04M3/48 , H04M11/00 , H04Q3/58 , H04M1/56 , H04M15/06
CPC分类号： H04M3/48
摘要： A keep call back device for connecting calls between subscribers includes a first call establishing portion for establishing a first call by connecting a call received from a calling terminal to a called terminal when it recognizes the call from the calling terminal which is able to respond to a call from one terminal without ending communication with another terminal during communication with another terminal, a second call establishing portion for establishing a second call by placing a call to the calling terminal after the first call has been established, and a call releasing portion for releasing the first call by disconnecting the same when the second call is established.
摘要翻译：用于在用户之间连接呼叫的保持回叫设备包括：第一呼叫建立部分，用于通过将从呼叫终端接收的呼叫连接到被叫终端来建立第一呼叫，当其识别来自主叫终端的呼叫时，能够响应于呼叫终端来自一个终端的呼叫，而不与另一个终端通信，与另一个终端通信，第二呼叫建立部分，用于通过在第一呼叫建立之后向呼叫终端发起呼叫来建立第二呼叫;以及呼叫释放部分，用于释放当第二个呼叫建立时，通过断开相同的呼叫。

5. 发明授权

US4736370A Transmitting data processing system 失效
标题翻译：传输数据处理系统
公开(公告)号：US4736370A
公开(公告)日：1988-04-05
申请号：US827975
申请日：1986-01-29
申请人： Masashi Hirome , Kiyotaka Shikata
发明人： Masashi Hirome , Kiyotaka Shikata
IPC分类号： H04L12/28 , H04L7/00 , H04L7/04 , H04L7/10 , H04L12/42 , H04L25/52 , H04J3/26
CPC分类号： H04L12/422 , H04L7/10 , H04L7/042 , H04L7/046
摘要： A transmitting data processing system used in a node of a data transmitting system, such as a local area network, applied in a wide area using a relatively long range transmission line and a plurality of the nodes on the transmission line for relaying a frame comprising a preamble pattern and transmitting data. A beginning part of the preamble is dissipated or lost in each node when a clock signal is extracted from the preamble pattern. The dissipated part is restored in the node by adding a newly generated preamble signal having a time duration being substantially equal to the time duration of the dissipated part at the beginning of the dissipated preamble pattern after sensing the dissipated preamble pattern, or by replacing the dissipated preamble pattern with a newly generated preamble pattern equal to a standard preamble pattern after sensing a carrier of the frame.
摘要翻译： PCT No.PCT / JP85 / 00713 Sec。 371日期1986年1月29日 102（e）日期1986年1月29日PCT提交1985年12月25日PCT公布。公开号WO86 / 04203 日期1986年7月17日。一种在诸如局域网的数据传输系统的节点中使用的发射数据处理系统，其使用相对较远的传输线和传输的多个节点在广域上应用用于中继包括前导码模式和发送数据的帧的线路。当从前导码模式中提取时钟信号时，前导码的开始部分在每个节点中消散或丢失。通过在感测消散的前导码模式之后，通过添加新产生的前导信号，其余时间基本上等于消耗的前导码模式开始时的耗散部分的持续时间，或者通过将耗散部分在检测到帧的载波之后，具有等于标准前导码模式的新产生的前同步码模式的前导码模式。

6. 发明授权

US4727592A Optical communication system 失效
标题翻译：光通信系统
公开(公告)号：US4727592A
公开(公告)日：1988-02-23
申请号：US47592
申请日：1987-05-11
申请人： Akihiro Okada , Shun Suzuki , Osamu Takahashi , Kiyotaka Shikata
发明人： Akihiro Okada , Shun Suzuki , Osamu Takahashi , Kiyotaka Shikata
IPC分类号： H04B10/27 , H04B10/278 , H04L7/027 , H04L7/04 , H04L12/413 , G02F1/00 , H04J1/10
CPC分类号： H04B10/27 , H04B10/278 , H04L12/40006 , H04L12/413 , H04L7/027 , H04L7/046
摘要： An optical communication system including repeaters which return a preamble signal to the receive line as soon as it detects a carrier on the transmit line of a single line optical bus. Therefore, transmission equipment can confirm data transmission quickly because the time delay between data transmission and its confirmation is decreased. The repeater also monitors a time delay associated with the return through a return loop of the transmitted data, and produces and transmits a failure signal when the time delay is longer than a predetermined value. The system also includes an optical transceiver connected between the optical bus and the transmission equipment which converts optical signals into electrical signals and visa versa and also adds the preamble signal to the front of data to be transmitted.

7. 发明授权

US5852405A Wireless LAN system 失效
标题翻译：无线局域网系统
公开(公告)号：US5852405A
公开(公告)日：1998-12-22
申请号：US548532
申请日：1995-10-26
申请人： Norihiro Yoneda , Kiyotaka Shikata
发明人： Norihiro Yoneda , Kiyotaka Shikata
IPC分类号： H04L12/28 , H04L12/46 , H04W8/26 , H04W24/00 , H04W28/04 , H04W72/04 , H04W74/08 , H04W84/12 , H04W88/08 , H04W92/20 , H04Q7/00
CPC分类号： H04W84/12
摘要： In a wireless LAN system having two or more master stations each connected to a wired LAN and a plurality of slave stations each connected to a terminal for wirelessly sending and receiving signals to and from the master station via a prescribed channel, each master station is provided with a table for managing the state of channel use. The master station has a LAN controller which periodically notifies the other master station of the state of use of its own channel via a notification packet. Upon receiving a notification packet sent periodically from the other master station, the LAN controller stores the state of use of the channel of the other master station, of which it has been notified by the notification packet, in the channel management table. When it becomes necessary to allocate a channel to the slave station under its supervision, the LAN controller refers to the channel management table, selects a channel that is not being used by any other master station, allocates the selected channel to the slave station and communicates with the slave station. The LAN controller stores the state of use of its own channel in the table.
摘要翻译：在具有两个或更多个主站的无线LAN系统中，每个主站各自连接到有线LAN，以及多个从站，每个从站都连接到终端，用于经由规定的信道无线地向主站发送和从主站接收信号，提供每个主站具有用于管理频道使用状态的表。主站具有LAN控制器，其经由通知分组周期性地通知其他主站其自己的频道的使用状态。在接收到从另一个主站周期性地发送的通知包时，LAN控制器将其通过通知包通知的另一个主站的信道的使用状态存储在信道管理表中。当需要在其监控下向从站分配信道时，LAN控制器参考信道管理表，选择任何其他主站未使用的信道，将所选择的信道分配给从站并进行通信与奴隶站。 LAN控制器将其自己的通道的使用状态存储在表中。

8. 发明授权

US5724346A Means for maintaining connectable access points owing to movement of a mobile station between cells in a wireless LAN system 失效
标题翻译：用于通过移动站在无线LAN系统中的小区之间移动来维持可连接接入点的装置
公开(公告)号：US5724346A
公开(公告)日：1998-03-03
申请号：US529525
申请日：1995-09-18
申请人： Naofumi Kobayashi , Kiyotaka Shikata , Osamu Sekihata
发明人： Naofumi Kobayashi , Kiyotaka Shikata , Osamu Sekihata
IPC分类号： H04L12/28 , H04J3/02
CPC分类号： H04W48/20 , H04W36/08
摘要： A mobile user station periodically searches for a connectable access point and stores the address of a connectable access point that has been found in a master-station management table. When the mobile user station moves from one cell to another under these conditions, the state of communication with the old access point deteriorates. When the state of communication with the old access point deteriorates to such a degree that it becomes necessary for the mobile user station to connect to a new access point, the mobile user station sends a connection request to the access point stored in the master-station management table and performs communication via the new access point. As a result, when connection to a new access point becomes necessary owing to movement of the mobile user station between cells, the changeover between access points can be performed quickly without searching for an access point.
摘要翻译：移动用户站周期性地搜索可连接接入点，并存储在主站管理表中已经找到的可连接接入点的地址。当移动用户站在这些条件下从一个小区移动到另一个小区时，与旧接入点的通信状态恶化。当与旧接入点的通信状态恶化到移动用户站需要连接到新接入点的程度时，移动用户站向存储在主站中的接入点发送连接请求管理表，并通过新的接入点进行通信。结果，由于移动用户站在小区之间的移动，当连接到新的接入点变得必要时，可以快速地执行接入点之间的切换而不搜索接入点。

9. 发明授权

US07418009B2 Method of transferring frames of variable length for a passive optical network that improves network efficiency and simplifies child apparatus 有权
标题翻译：为无源光网络传输可变长度帧的方法，提高网络效率并简化子设备
公开(公告)号：US07418009B2
公开(公告)日：2008-08-26
申请号：US10134545
申请日：2002-04-30
申请人： Susumu Tominaga , Masaharu Matsumoto , Takamitsu Shirai , Katsuhiko Hirashima , Kazuhiro Uchida , Kenichi Abe , Shigeharu Murakami , Miho Kawai , Kiyotaka Shikata
发明人： Susumu Tominaga , Masaharu Matsumoto , Takamitsu Shirai , Katsuhiko Hirashima , Kazuhiro Uchida , Kenichi Abe , Shigeharu Murakami , Miho Kawai , Kiyotaka Shikata
IPC分类号： H04J3/16
CPC分类号： H04J3/1694 , H04L2012/561 , H04L2012/5616 , H04L2012/5667
摘要： A method of communicating through a passive optical network (PON) that improves the efficiency of the network with low cost child apparatuses having only simple functions. A parent apparatus provides the child apparatuses with a multi-frame standard signal, and a child apparatus transfers asynchronous information as a frame of variable length, as it is, at a time delayed from the multi-frame standard signal by a time period designated by the parent apparatus. Since the asynchronous information does not need to be divided into pieces to which a frame header is attached, the efficiency of the uplink channel is increased.
摘要翻译：一种通过无源光网络（PON）进行通信的方法，其通过具有简单功能的低成本子设备来提高网络的效率。父设备向子设备提供多帧标准信号，并且子设备在与多帧标准信号延迟的时间之间传输异步信息作为可变长度的帧，直到由多帧标准信号指定的时间段父设备。由于异步信息不需要被划分成附加帧头的部分，所以上行链路信道的效率增加。

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