公开(公告)号：US06078590A

公开(公告)日：2000-06-20

申请号：US897215

申请日：1997-07-14

申请人： Dino Farinacci ,  Yakov Rekhter

发明人： Dino Farinacci ,  Yakov Rekhter

IPC分类号： H04L4/00

CPC分类号： H04L12/18 ,  H04L45/02 ,  H04L45/04 ,  H04L45/16

摘要： The invention provides a method and system for multicast packet routing, in which only selected routers in a network subset (in a preferred embodiment, those routers on the border of the domain) maintain routing information external to the network subset, while all other routers in the network subset (non-border routers) maintain only information regarding routing within the network subset, including which border routers are on the path from the multicast source device or to the destination devices. The network subset is preferably a domain or other routing domain. A multicast distribution tree is maintained, using protocol messages which are transmitted from leaf nodes toward a root of the tree, while data packets to be multicast are distributed from the root toward the leaf nodes. In each network subset, such as a routing domain, each multicast packet is associated with a multicast distribution tree. The multicast distribution tree is associated with an upstream border router (UBR) and a set of downstream border routers (DBRs). The UBR and DBRs maintain complete routing information for each multicast source device, while all other routers in the network subset maintain routing information only to the UBR and DBRs. A "JOIN" or "PRUNE" protocol message associates a particular UBR with a particular multicast source device, so that non-border routers within the network subset only have to maintain routing information to border routers, while still being able to correctly maintain a multicast distribution tree rooted at a node outside the network subset.

公开(公告)号：US08284746B2

公开(公告)日：2012-10-09

申请号：US12676326

申请日：2008-08-28

申请人： Tomohiro Tokuyasu ,  Makoto Umeuchi ,  Toshihiro Manabe ,  Hiroshi Hojo ,  Kengo Nagata ,  Tadao Kobayashi

发明人： Tomohiro Tokuyasu ,  Makoto Umeuchi ,  Toshihiro Manabe ,  Hiroshi Hojo ,  Kengo Nagata ,  Tadao Kobayashi

IPC分类号： H04L4/00

CPC分类号： H04W88/04 ,  H04B7/155 ,  H04W72/02 ,  H04W88/06

摘要： A wireless relay device connecting a wireless terminal to one of a plurality of access networks with different wireless interfaces and performing relay processing between the wireless terminal and one of the plurality of access networks being connected, the wireless relay device including a wireless interface on local side to be connected to the wireless terminal, a plurality of wireless interfaces on network side to be connected to the plurality of respective access networks, and a connection control section which boots the plurality of wireless interfaces on network side when the wireless interface on local side receives a signal from the wireless terminal, connects a wireless interface on network side establishing a fastest connection and the wireless interface on local side, and connects the wireless terminal to an access network corresponding to the wireless interface on network side establishing the fastest connection.

摘要翻译： 一种无线中继设备，其将无线终端连接到具有不同无线接口的多个接入网络中的一个，并且在所述无线终端与所连接的所述多个接入网络之一之间进行中继处理，所述无线中继设备包括本地侧的无线接口 要连接到无线终端，网络侧的多个无线接口要连接到多个相应的接入网络;以及连接控制部分，当本地无线接口接收到时，连接控制部分在网络侧启动多个无线接口 来自无线终端的信号连接网络侧的无线接口建立最快的连接和本地的无线接口，并且将无线终端连接到与网络侧的无线接口对应的接入网络，建立最快的连接。

公开(公告)号：US06999947B2

公开(公告)日：2006-02-14

申请号：US09187749

申请日：1998-11-09

申请人： Kenichi Utsumi ,  Hideyuki Hirano ,  Seigo Kotani

发明人： Kenichi Utsumi ,  Hideyuki Hirano ,  Seigo Kotani

IPC分类号： H04L4/00 ,  G06F17/60

CPC分类号： G06F21/10 ,  G06F21/105 ,  G06F2221/0793 ,  G11B20/00086 ,  G11B20/0021 ,  H04L9/0822 ,  H04L9/0894 ,  H04L2209/605

摘要： There is provided a license devolution system for devolving the right of using as to contents. The license devolution system makes it possible to copy or distribute contents while contributing to a protection of the copyright for the contents. Contents is encrypted with a first key. The first key and use information are encrypted with a second key consisting of a media ID for identifying a first storage medium in which the first key and the use information are stored. In order to devolve the right of using as to the contents, the contents is transferred to a second storage medium of a destination of devolution in the form of encryption. The first key and the use information are decoded with the media ID of the first storage medium, and further encrypted with the media ID of the second storage medium of the destination of devolution into storage in the second storage medium of the destination of devolution.

摘要翻译： 提供了许可证下放系统，用于放弃使用内容的权利。 许可证下放系统使得可以复制或分发内容，同时有助于保护内容的版权。 内容使用第一个密钥加密。 第一密钥和使用信息用由用于标识其中存储有第一密钥和使用信息的第一存储介质的介质ID组成的第二密钥加密。 为了将内容的使用权移交给内容，以加密的形式将内容传送到目的地的第二存储介质。 第一密钥和使用信息用第一存储介质的介质ID进行解码，并且进一步用归档目的地的第二存储介质的介质ID加密到存储在存储在第二存储介质中的目的地。

公开(公告)号：US6075787A

公开(公告)日：2000-06-13

申请号：US852971

申请日：1997-05-08

申请人： James D. Bobeck ,  Edward Alan Clark

发明人： James D. Bobeck ,  Edward Alan Clark

IPC分类号： H04L12/56 ,  H04Q11/04 ,  H04L4/00

CPC分类号： H04Q11/0478 ,  H04L2012/5605 ,  H04L2012/5606 ,  H04L2012/563

摘要： The specification relates to a broadband multiple access protocol for bi-directional hybrid fiber/coax (HFC) networks and other shared media networks. The protocol supports downstream broadcast transmission from headend to cable modem, and also provides for allocation of bandwidth for cable modems to transmit back to the headend. The HE transmits and receives control messages in either ATM or VL format, depending upon CM capability, the determination of CM capability ascertained by the HE during the message flows interchanged between HE and CM while establishing a data link. Although the present invention is described in relation to an HFC network, it is also equally applicable to other shared media networks. The protocol supports different data access modes such as STM, ATM, and VL; within each subframe of a subframe/frame/masterframe structure. The protocol adapts to changing demands for a mix of circuit and packet mode applications and allocates upstream and downstream bandwidth in response to the a variety of bursty and isochronous traffic sources. In order to satisfy the quality of service requirements of varied applications, while maintaining high bandwidth efficiency, the protocol utilizes a subframe structure with subframe partitioning into regions; one region dedicated to STM payload transmission, a second region dedicated to ATM cell transmission, and a third region dedicated to VL payload transmissions.

摘要翻译： 该规范涉及用于双向混合光纤/同轴（HFC）网络和其他共享媒体网络的宽带多址协议。 该协议支持从头端到电缆调制解调器的下行广播传输，并且还为电缆调制解调器的带宽分配提供发送回头端。 HE根据CM的能力，以ATM或VL格式发送和接收控制消息，确定在HE和CM间建立数据链路的消息流中HE之间确定的CM能力。 尽管关于HFC网络描述了本发明，但是也可以应用于其他共享媒体网络。 该协议支持不同的数据访问模式，如STM，ATM和VL; 在子帧/帧/主帧结构的每个子帧内。 该协议适应于对电路和分组模式应用的混合的不断变化的需求，并且响应于各种突发和等时业务源来分配上行和下行带宽。 为了满足各种应用的服务质量要求，在保持高带宽效率的同时，协议利用子帧结构，将子帧划分到区域中; 专用于STM有效载荷传输的一个区域，专用于ATM信元传输的第二区域和专用于VL有效载荷传输的第三区域。

公开(公告)号：US5872819A

公开(公告)日：1999-02-16

申请号：US803049

申请日：1997-02-19

申请人： Stephen Rocco Carsello ,  Leo G. Dehner

发明人： Stephen Rocco Carsello ,  Leo G. Dehner

IPC分类号： H04L7/033 ,  H04L4/00 ,  H03D3/24

CPC分类号： H04L7/0334

摘要： A method and apparatus samples (902) a currently received symbol to form sampled values corresponding to sampling times, and evaluates (904) the currently received symbol to determine (906) its value. The method and apparatus recalls (908) a last previously received symbol and selects (916), from a plurality of thresholds (302), a threshold based upon the currently received symbol and the last previously received symbol. The threshold is known to be crossed consistently midway in time between the centers of two adjacent nominal symbols determined by the currently received symbol and the last previously received symbol. The sampled values are compared (920) to locate two adjacent samples, one having a first sampled value greater than the threshold and one having a second sampled value less than or equal to the threshold. A timing phase error is then computed (922, 924) from the first and second sampled values.

摘要翻译： 一种方法和装置对当前接收到的符号进行采样（902）以形成对应于采样时间的采样值，并评估（904）当前接收的符号以确定（906）其值。 方法和装置回忆（908）最后一个先前接收到的符号，并且从多个阈值（302）中选择（916）基于当前接收到的符号和最后一个先前接收到的符号的阈值。 已知阈值在由当前接收的符号和最后的先前接收到的符号确定的两个相邻标称符号的中心之间的时间中间交叉。 采样值被比较（920）以定位两个相邻样本，一个具有大于阈值的第一采样值，另一个具有小于或等于该阈值的第二采样值。 然后从第一和第二采样值计算定时相位误差（922,924）。

公开(公告)号：US5754653A

公开(公告)日：1998-05-19

申请号：US506781

申请日：1995-07-26

申请人： Henry A. Canfield

发明人： Henry A. Canfield

IPC分类号： G07F7/10 ,  H04L4/00

CPC分类号： G07F7/10 ,  G06Q20/042 ,  G06Q20/206 ,  G06Q20/401 ,  G06Q20/4012 ,  G07F7/1066

摘要： A method is disclosed for verifying that a check user, a credit card holder, or an account user is authorized to complete a transaction. The issuer of the check or credit card or the verifying entity assigns a security code formula to each user, consisting of two variables: a base code number separated into two parts; and one or more arithmetic modes. The authorized user will calculate a verification code number in a two step process using the two parts of the base code and the check number or transaction amount; he then places it on the check or the transaction slip. Verification can be performed by the issuer, who ensures that a correct verification code number has been entered on the check or transaction slip.

摘要翻译： 公开了一种用于验证支票用户，信用卡持有者或帐户用户被授权完成交易的方法。 支票或信用卡或验证实体的发行人向每个用户分配一个安全码公式，由两个变量组成：一个分为两部分的基本号码; 和一种或多种算术模式。 授权用户将使用基本代码和支票号码或交易金额的两个部分在两步过程中计算验证码： 然后他将其放在支票或交易单上。 验证可以由发行人执行，发行人确保在支票或交易单上输入了正确的验证码。

公开(公告)号：US5440591A

公开(公告)日：1995-08-08

申请号：US866703

申请日：1992-04-10

申请人： John E. Liron ,  Leon J. Stanger

发明人： John E. Liron ,  Leon J. Stanger

IPC分类号： H04J3/00 ,  H04L7/02 ,  H04N5/073 ,  H04N5/268 ,  H04Q3/52 ,  H04L4/00

CPC分类号： H04N5/0736 ,  H04N5/268

摘要： A circuit for preserving a predetermined timing relationship between a synchronization signal including periodic sync codes and a digital signal composed of successive frames of which the nominal duration is equal to the period of the sync codes includes a delay device connected to receive the digital signal. The delay device is selectively adjustable to impose a controllable delay on propagation of the digital signal. A FAW detector detects a frame alignment word in the digital signal, and a time measurement circuit measures the time that elapses between occurrence of a sync code and detection of a frame alignment word. A delay adjustment circuit is responsive to the time measurement circuit to adjust the delay imposed by the delay device.

摘要翻译： 用于保持包括周期性同步码的同步信号和由标称持续时间等于同步码的周期的​​连续帧组成的数字信号之间的预定定时关系的电路包括连接以接收数字信号的延迟装置。 该延迟装置可选择性地调节，以对数字信号的传播施加可控制的延迟。 FAW检测器检测数字信号中的帧对准字，并且时间测量电路测量出现同步码和帧对准字的检测之间经过的时间。 延迟调整电路响应时间测量电路来调整由延迟装置施加的延迟。