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    • 2. 发明授权
    • Channel sharing and memory sharing in a packet switching system
    • 分组交换系统中的信道共享和内存共享
    • US5457679A
    • 1995-10-10
    • US164075
    • 1993-12-08
    • Kai Y. EngRichard D. GitlinMark J. Karol
    • Kai Y. EngRichard D. GitlinMark J. Karol
    • H04Q3/00H04L12/56H04Q11/04
    • H04L49/103H04Q11/0478H04L49/25H04L49/3009H04L49/3027
    • The present invention concerns a method and apparatus for memory and channel sharing in a communication switching network which uses packet switching. In one form of the invention memory and channel sharing is provided within a packet switch. The packet switch includes a memory for storing a plurality data packets and a router that routes data packets from the memory to a particular output port. The router is operable to route data packets to either a dedicated output port, in other words, an output port defined by the virtual circuit path of the data packet, or a shared output port. In another form of the invention memory and channel sharing is provided by a packet switch in conjunction with a terminal. Protection lines which are provided in transmission systems can be used as the shared channels.
    • 本发明涉及一种使用分组交换的通信交换网络中的存储器和信道共享的方法和装置。 在本发明的一种形式中,在分组交换机内提供存储器和信道共享。 分组交换机包括用于存储多个数据分组的存储器和将数据分组从存储器路由到特定输出端口的路由器。 路由器可操作地将数据分组路由到专用输出端口,换句话说,由数据分组的虚拟电路路径或共享输出端口定义的输出端口。 在本发明的另一种形式中,存储器和信道共享由分组交换机结合终端提供。 在传输系统中提供的保护线路可以用作共享信道。
    • 5. 发明授权
    • System and method for diversity coded orthogonal frequency division multiplexing (OFDM)
    • 用于分集编码正交频分复用(OFDM)的系统和方法
    • US09020059B1
    • 2015-04-28
    • US14098173
    • 2013-12-05
    • Gabriel E. ArroboRichard D. Gitlin
    • Gabriel E. ArroboRichard D. Gitlin
    • H04L1/02H04L27/26
    • H04L1/02H04L1/22H04L5/0023H04L27/2634H04L27/2647
    • The present invention provides a Diversity Coding—Orthogonal Frequency Division Multiplexing (DC-OFDM) system and method that applies diversity coding to OFDM-based systems and provides improved probability of successful reception at the receiver and transparent self-healing and fault-tolerance. Diversity coding is well suited for OFDM-based systems because of its spatial diversity nature (parallel links). DC-OFDM provides the best performance when the probability of link error is high or when a link (sub-channel) fails. Also, by implementing diversity coding in OFDM-based systems, a reliable communication can be provided that is quite tolerant of link failures, since data and protection lines are transmitted via multiple sub-channels.
    • 本发明提供了对基于OFDM的系统应用分集编码的分集编码 - 正交频分复用(DC-OFDM)系统和方法,并且提供了在接收机处成功接收的改进概率,并且具有透明的自愈和容错能力。 分集编码由于其空间分集性质(并行链路)而非常适合基于OFDM的系统。 当链路错误的概率较高或链路(子信道)出现故障时,DC-OFDM提供最佳性能。 此外,通过在基于OFDM的系统中实现分集编码,可以提供非常容忍链路故障的可靠通信,因为数据和保护线路经由多个子信道发送。
    • 8. 发明授权
    • Gigabit per-second optical packet switching with electronic control
    • 千兆每秒光分组交换与电子控制
    • US5278689A
    • 1994-01-11
    • US22614
    • 1993-02-19
    • Richard D. GitlinZygmunt Haas
    • Richard D. GitlinZygmunt Haas
    • H04J3/22H04J3/24H04J14/08H04L7/06H04L12/56H04Q11/00
    • H04Q11/0001H04J3/22H04J3/247H04L49/3081H04L49/357H04L7/06H04J14/08H04L49/30H04Q11/0066
    • Currently, with optical time division multiplexing, a switching node is operated at the peak transmission rate. For example, if the data transmission rate is 10 Gbps, the line cards in the switching circuit are also required to operate at this rate despite the fact that the switching node does not actually need to access the data at this rate. Thus, the electronics, which includes the line cards at the switching node, is expensive and less reliable than a low-speed design. In this invention the requirement of operating the switching node electronics at the high speed link bit rate is eliminated by encoding the packet header field at a lower rate than the information in the data field. As a result, the line cards need only operate at the lower header rate. This is possible because the switching node does not need to process the data portion of the packet, but only the header information. The high-speed data portion of the packet is not optically to electrically converted at the switching node, but it passes almost transparently through the switching node. The invention also discloses overlapping several logical networks on the same physical network.
    • 目前,通过光时分复用,交换节点以峰值传输速率运行。 例如,如果数据传输速率为10Gbps,则切换电路中的线路卡还需要以该速率操作,尽管切换节点实际上不需要以该速率访问数据。 因此,包括开关节点处的线路卡的电子装置比低速设计昂贵且不太可靠。 在本发明中,通过以比数据字段中的信息更低的速率编码分组报头字段来消除以高速链路比特率操作交换节点电子设备的要求。 因此,线卡只需要在较低的标题速率下运行。 这是可能的,因为交换节点不需要处理分组的数据部分,而仅需要处理报头信息。 分组的高速数据部分在交换节点处不是光学地电转换,而是几乎透明地通过交换节点。 本发明还公开了在相同物理网络上重叠多个逻辑网络。