110 results about "High-Level Data Link Control" patented technology

The present disclosure provides systems and methods for rapid circuit provisioning in Optical Transport Networks (OTN) using signaling and routing protocols thereby enabling fast mesh restoration. The present invention utilizes a shim layer between OTN messaging (e.g., GCC or High-Level Data Link Control (HDLC)) and the associated signaling and routing protocol (e.g., OSRP, GMPLS, etc.). If an ODUk Connection CTP or TTP needs to be created, the shim layer runs a fast “OTN Setup” protocol, while buffering out going OTN messages. Incoming messages are still processed and do not require additional buffering. The purpose of the OTN Setup protocol is to allow the OTUk to re-frame on its client ODUk, while buffering out-going messages. When re-framing completes, buffers are released and the OTN messaging resumes without dropping any of the signaling frames.

A Multiservice Access Concentrator (MAC) provides a time limit for a first ringing voltage signal in response to an attempted call. The call is attempted via a voice over packet-data-network system (VOPS), wherein the VOPS comprises voice over Internet Protocol (IP), voice over Frame Relay, voice over Asynchronous Transfer Mode (ATM), and voice over High-level Data Link Control (HDLC) network systems. Generation of the first ringing voltage signal is terminated upon expiration of the time limit. A control message is transmitted to terminate the attempted call, wherein the control message is transmitted via the VOPS.

In a data processing system including a plurality of digital signal processor subsystems, selected peripheral components are shared by the digital signal processor subsystems. In particular, the high level data link controller is shared by the subsystems. Using a first interrupt signal after each transfer of signal groups from the peripheral direct memory access unit, the data can be efficiently transferred from a channel memory of the peripheral direct memory access unit to the high level data link controller. A second interrupt from the high level data link controller when a last word of a packet is transferred thereto causes a new channel memory to be accessed. An abort signal is generated when a signal group for a packet being processed by the high level data link controller is not available in a timely manner.

In a data processing system including a plurality of digital signal processor subsystems, selected peripheral components are shared by the digital signal processor subsystems. In particular, the high level data link controller is shared by the subsystems. When a packet is received by a shared high level data link controller, the data signal groups are processed and placed in a temporary storage unit. The address signal group of the received packet is applied to channel block unit where the digital signal processor subsystem, to which the packet is directed, is identified and an INTERRUPT signal corresponding to the identified digital signal processor subsystem is generated. The INTERRUPT signal is applied to a switch. The switch, which receives the signal groups from the temporary storage unit, directs the signal groups to a buffer memory in the channel associated with the identified signal processing subsystem. In response to a predetermined condition, the signal groups are forwarded to the identified digital signal processor subsystem. The channel block unit, in response to preselected signal groups, can direct the packet to a digital signal processor subsystem that is different from the digital signal processor subsystem identified by the address signal group.

The embodiment of the invention provides a method for managing link status information of a low-speed link. The method comprises the following steps that: a first notification message sent by a second network device through the low-speed link, is received by a first network device; the first notification message is an HDLC (High-level Data Link Control) protocol message or a PPP (Point-to-point Protocol) protocol message of the link status information of the low-speed link at the side of the second network device; the first notification message is analyzed by the first network device to obtain the link status information of the low-speed link at the side of the second network device; and the link status information of the low-speed link at the side of the second network device is stored into a management information base. In addition, the embodiment of the invention further provides a device and system for managing the link status information of the low-speed link. According to the invention, the transmission of the link status information of the low-speed link between the network devices is realized and the management of the link status information of the low-speed link is realized.