公开(公告)号：US4542499A

公开(公告)日：1985-09-17

申请号：US425858

申请日：1982-09-28

申请人： Luigi Bella ,  Roberto Brignolo ,  Giulio Barberis ,  Maurizio Sposini

发明人： Luigi Bella ,  Roberto Brignolo ,  Giulio Barberis ,  Maurizio Sposini

IPC分类号： H04Q11/04 ,  H04L12/413 ,  H04M11/06 ,  H04J3/02 ,  H04J3/00

CPC分类号： H04L12/413 ,  H04M11/068

摘要： The system allows the implementation of packet-switched synchronous speech communications in the network without requiring any centralized device synchronizing all the network stations. To obtain that, the active periods of each station are subdivided into frames each having a duration equal to the time elapsing between the generation to two subsequent speech packets relating to the same communication; once a station has accessed the line for the speech communications, these communications are allotted time slots which are maintained for the whole communication duration. The slots not allotted to speech communications are allotted to data transmission. The access to the line for a speech communication is obtained by the same contention techniques used also for data transmission.

摘要翻译： 该系统允许在网络中实现分组交换同步语音通信，而不需要任何集中式设备来同步所有网络站。 为了获得这一点，每个站的活动周期被细分为每个帧的持续时间等于与相同通信相关的生成到两个后续语音分组之间的时间的帧; 一旦一个站已经访问了用于语音通信的线路，则这些通信被分配在整个通信持续时间内保持的时隙。 未分配给语音通信的时隙被分配给数据传输。 用于语音通信的线路的访问通过用于数据传输的相同争用技术来获得。

公开(公告)号：US4841523A

公开(公告)日：1989-06-20

申请号：US137801

申请日：1987-12-23

申请人： Daniele Roffinella ,  Maurizio Sposini

发明人： Daniele Roffinella ,  Maurizio Sposini

IPC分类号： H04L12/433 ,  H04L12/64

CPC分类号： H04L12/433 ,  H04L12/64

摘要： A method of accessing a local-area network which allows transmission on a unidirectional ring, of circuit-switched or packet-switched communications organized in hybrid frames, in which overlapping between the beginning of a frame and a residual of the preceding frame which is still to reach its destination is avoided without reporting to a rigid band allotment to the indiviual communications and to a network synchronization system, where a well defined node acts as a master clock. According to the method the individual nodes of the network, access in sequence the transmission line in each frame, maintaining the same order of asynchronous access in the circuit and packet regions. To avoid overlapping between adjacent frames, in the packet region of each frame, starting from an instant preceding by a predetermined time period the end of the frame, the packet transmission by the node which has the right of access at the instant or by the nodes which would have the right of access from that instant to the end of the new frame, is disabled. y

摘要翻译： 一种访问局域网的方法，其允许在单向环上进行传输，组合在混合帧中的电路交换或分组交换通信，其中帧的开始和仍在前一帧的剩余之间重叠 避免到达其目的地，而不需要报告到单独通信的刚性波段分配和网络同步系统，其中良好定义的节点用作主时钟。 根据该方法，网络的各个节点按顺序访问每个帧中的传输线，在电路和分组区域中保持异步访问的相同顺序。 为了避免相邻帧之间的重叠，在每帧的分组区域中，从在帧的结束之前的预定时间段开始的时刻，由即时或由节点具有访问权限的节点的分组传输 这将具有从即时到新帧结束的权限，被禁用。

公开(公告)号：US4663758A

公开(公告)日：1987-05-05

申请号：US768861

申请日：1985-08-23

申请人： Livio Lambarelli ,  Daniele Roffinella ,  Maurizio Sposini

发明人： Livio Lambarelli ,  Daniele Roffinella ,  Maurizio Sposini

IPC分类号： H04L12/407 ,  H04L12/64 ,  H04J3/26

CPC分类号： H04L12/40032 ,  H04L12/407 ,  H04L12/64

摘要： The system comprises a plurality of units arranged along a unidirectional line whereupon information is transmitted relevant to circuit switched and packet switched communications and organized into hybrid frames comprising a region for each communication type. The units comprise devices handling the access to the line which cooperate with one another and with a frame signal generator, centralized or associated with each unit, to implement in distributed way an ordered protocol without collisions in both frame region, based on physical unit location.

摘要翻译： 该系统包括沿着单向线路布置的多个单元，因此与电路交换和分组交换通信有关的信息被传输并被组织成包括用于每种通信类型的区域的混合帧。 这些单元包括处理对彼此协作的线的接入以及与每个单元集中或相关联的帧信号发生器的设备，以基于物理单元位置在两个帧区域中以分布式方式实现有序协议而没有冲突。

公开(公告)号：US4611321A

公开(公告)日：1986-09-09

申请号：US638353

申请日：1984-08-06

申请人： Luciano Gabrielli ,  Nicola Lotito ,  Maurizio Sposini

发明人： Luciano Gabrielli ,  Nicola Lotito ,  Maurizio Sposini

IPC分类号： H04Q11/04 ,  H04L12/407 ,  H04L12/64 ,  H04M11/06

CPC分类号： H04M11/06 ,  H04L12/64

摘要： A variable-band distributed switching node comprises a plurality of independent modules (MU.sub.1 . . . MGm) inserted between subscriber or trunk lines and a common bus (1). Each module includes an input/output portion (IU, HL, SL, PL), processing line information, and an interface (IB) toward the bus which co-operates with the interfaces of the other modules to form hybrid frames on the bus. These frames are each divided into a first region RC, encompassing a plurality of channels assigned to circuit-switched communications, and a residual-band second portion RP shared by packet-switched communications. Such frames are dynamically managed by assigning to each circuit-switched channel a band which can differ in consecutive frames to satisfy the requirements of variable-band sources and by recompacting the channels remaining in region RC after each channel release.

摘要翻译： 可变带分布式交换节点包括插入订户或中继线之间的多个独立模块（MU1 ... MGm）和公共总线（1）。 每个模块包括输入/​​输出部分（IU，HL，SL，PL），处理线信息和朝向与其它模块的接口协作的总线的接口（IB），以在总线上形成混合帧。 这些帧分别被分成包含分配给电路交换通信的多个信道的第一区域RC以及由分组交换通信共享的残余频带第二部分RP。 通过向每个电路交换信道分配可以在连续帧中不同的频带以满足可变频带源的要求并且通过在每个频道释放之后重新压缩区域RC中剩余的频道来动态地管理这样的帧。

公开(公告)号：US4696001A

公开(公告)日：1987-09-22

申请号：US817031

申请日：1986-01-08

申请人： Fabrizio Gagliardi ,  Livio Lambarelli ,  Gianfranco Panarotto ,  Daniele Roffinella ,  Maurizio Sposini

发明人： Fabrizio Gagliardi ,  Livio Lambarelli ,  Gianfranco Panarotto ,  Daniele Roffinella ,  Maurizio Sposini

IPC分类号： H04M3/00 ,  H04L12/28 ,  H04L12/437 ,  H04Q3/00 ,  H04J3/14

CPC分类号： H04L12/437 ,  H04L12/28 ,  H04Q3/0079

摘要： The local network comprises a plurality of active nodes (N1 . . . Nn) placed along a folded unidirectional bus (1) which presents a writing branch (1W) and a reading branch (1R). The nodes present means (RR) for network reconfiguration in the presence of a failure, through an isolation of the parts concerned by the failure, through an isolation of the parts concerned by the failure, and for regular service restoration after the repair, and means (GA) for the implementation of an ordered access protocol, which is based on the physical position of the nodes (N1 . . . Nn) and allows hybrid frames to be transmitted through the bus (FIG. 1).

摘要翻译： 本地网络包括沿着呈现写分支（1W）和读分支（1R）的折叠单向总线（1）放置的多个活动节点（N1 ... Nn）。 在存在故障的情况下，节点存在用于网络重新配置的装置（RR），通过故障相关部件的隔离，通过故障相关部件的隔离以及修复之后的常规服务恢复， （GA），用于实现基于节点（N1 ... Nn）的物理位置的有序接入协议，并允许混合帧通过总线发送（图1）。

公开(公告)号：US4538263A

公开(公告)日：1985-08-27

申请号：US502084

申请日：1983-06-08

申请人： Luciano Gabrielli ,  Maurizio Sposini

发明人： Luciano Gabrielli ,  Maurizio Sposini

IPC分类号： H04Q11/04 ,  H04L12/407 ,  H04L12/64 ,  H04J3/00

CPC分类号： H04L12/64

摘要： A communication system serving a number of nodes, each associated with a group of subscriber terminals, comprises a unidirectional bus bent into a loop to form a transmitting branch and a receiving branch respectively connected by an outgoing coupler and an incoming coupler to all the terminals of a given node. In each node a plurality of detectors on opposite sides of the outgoing coupler monitor the activity of the transmitting branch to determine whether the bus is free from any signal carrier originating at an upstream node, or generated at the node considered, and is thus available for voice or data packets to be sent out. Each terminal includes a receiving unit, responsive to a pre-engagement packet addressed thereto via the incoming coupler, which starts a local time base to establish a succession of frames encompassing each a number of time slots allocated to active speech channels in a voice period of a frame; the remainder of each frame is available for data transmission. The number of time slots constituting the voice period is variable; a memory forming part of a control section including the time base stores information on the state of activity of each time slot.

摘要翻译： 服务于多个节点的通信系统，每个节点与一组用户终端相关联，包括弯曲成环路的单向总线，以形成发射分支和接收分支，分别由输出耦合器和输入耦合器连接到所有终端 给定的节点。 在每个节点中，输出耦合器的相对侧上的多个检测器监视发射分支的活动，以确定总线是否不存在来自上游节点的任何信号载体，或者在所考虑的节点处产生，并且因此可用于 要发送的语音或数据包。 每个终端包括接收单元，响应于经由输入耦合器寻址到其上的预参与分组，该接收单元开始本地时基以在语音周期中建立包含分配给活动语音信道的每个多个时隙的一系列帧 一个框架; 每帧的剩余部分可用于数据传输。 构成语音周期的时隙的数量是可变的; 形成包括时基的控制部分的存储器的存储器存储关于每个时隙的活动状态的信息。

公开(公告)号：US4521882A

公开(公告)日：1985-06-04

申请号：US476224

申请日：1983-03-17

申请人： Luciano Gabrielli ,  Maurizio Sposini

发明人： Luciano Gabrielli ,  Maurizio Sposini

IPC分类号： H04L12/413 ,  H04L12/64 ,  H04J3/02

CPC分类号： H04L12/64 ,  H04L12/413

摘要： Each of several stations served by a common bus in a communication system of the packet-switching type has a layered structure interposed between a user terminal and a port giving access to the bus, this structure including an interface separating a transceiver at a bottom level of the structure from upper levels controlling the establishment, maintenance and termination of temporary signal paths for the transmission of data between stations. The interface is divided into a lower-tier portion, implemented by wired-logic circuitry, and a higher-tier portion, programmed to set up virtual point-to-point data links between its own station and other stations under the control of a microprocessor. The lower-tier portion dialogues with the transceiver and has transmitting and receiving sections with respective buffer memories for the temporary storage of outgoing message frames generated at the higher-tier portion and incoming message frames extracted from the bus and found to be addressed to the station involved. When an outgoing sequence consisting of one or more frames has been completely stored, or when the transmitting-side buffer memory is full, a logic unit in the transmitting section explores the probability of successful access to the bus with the aid of an algorithm based on a random numerical sequence different for several stations competing for access. When such access has been gained, the stored sequence is sent out. When an incoming sequence has been completely received, or when the receiving-side buffer memory is full, the contents of that memory are transferred to the higher-tier portion.

摘要翻译： 在分组交换型通信系统中由公共总线服务的几个站中的每个站具有插入在用户终端和给予总线访问的端口之间的分层结构，该结构包括将基站的底层的收发器分离 来自上层的结构控制站间传输数据的临时信号路径的建立，维护和终止。 该接口被分为由有线逻辑电路实现的较低层部分和较高层部分，被编程为在微处理器的控制下在其本站和其它站之间建立虚拟点对点数据链路 。 低层部分与收发器对话，并且具有各自的缓冲存储器的发送和接收部分，用于临时存储在较高层部分处生成的输出消息帧和从总线提取的传入消息帧，并发现其被寻址到站 涉及。 当由一个或多个帧组成的输出序列已被完全存储时，或者当发送侧缓冲存储器已满时，发送部分中的逻辑单元借助于基于 一个随机数字序列不同于几个站竞争访问。 当获得这种访问时，存储的序列被发送出去。 当输入的序列已被完全接收到，或者当接收侧的缓冲存储器已满时，该存储器的内容被传送到较高层的部分。