Stmicroelectronics Gmbh

Peter Groz

Harry S Hvostov

Anthony Fung

Danny K Hui

Jim C Hsu

Bernard Saby

A system and method for configuring and managing the connectivity of a broadband, cable modem network station to a network, including a state-driven network manager having a centralized error handling state and peripheral states for initialization, dynamic host configuration, configuration download, start simple-network-management, and an operational state. The operational state monitors for error and other messages communicated from other states and sends error messages to the centralized error-handling state and request messages to an operational support system interface management task. The error handling state receives error messages and requests error event logging from the operational support system interface management task. A change upstream-or-downstream channel task optimizes channel selection. The method includes initializing the network station to a predetermined set of parameters; creating and starting a dynamic-host-configuration protocol task; creating and starting a time-of-day task; creating and starting a configuration download task; creating and starting a simple-network-management protocol task; entering an operational state upon successful initialization of the network station and connectivity with the network, and, while in the operational state, monitoring the tasks for messages, including error messages and task messages; receiving error messages and initiating error recovery in response to the error messages; and receiving request messages and sending request messages to the operational support system interface management task.

Network station management system and method

A cable modem link layer bridge includes a downstream forwarding task and an upstream forwarding task. The downstream forwarding task is structured to receive a first message from a cable network and forward the first message to a customer premises equipment (CPE). The upstream forwarding task is structured to receive a second message from the CPE and forward the second message to the cable network, the upstream and downstream forwarding tasks being multitasked such that the second message is forwarded by the upstream forward task while the first message is being forwarded by the downstream forwarding task.

Cable modem link layer bridge

A system architecture for a high speed serial bus compatible with the 1394 standard is disclosed. A transaction interface coordinates data packets received from or sent to a 1394 bus. A kernel/scheduler/dispatcher is used to allocate memory resources, and start a variety of tasks and services. The tasks and services vary depending on protocols used in a transport layer and application layer used in conjunction with the 1394 layers. The transaction interface uses information derived from the data packets received to form message control blocks, particular for each individual task, and places the control blocks into the proper task queue. The transaction interface forms a dispatcher message control block and places it into the scheduler/dispatcher queue to initiate the task. If there are no other message control blocks in the queue particular for the called task, the called task is immediately started. Otherwise, the message control block waits in the queue to eventually be operated on.

Method and device for controlling communications with a serial bus

A system architecture for a high speed serial bus compatible with the 1394 standard is disclosed. A transaction interface coordinates data packets received from or sent to a 1394 bus. A kernel/scheduler/dispatcher is used to allocate memory resources, and start a variety of tasks and services. The tasks and services vary depending on protocols used in a transport layer and application layer used in conjunction with the 1394 layers. Each task operates according to a state machine progression. The transaction interface uses information derived from the data packets received to form message control blocks, particular for each individual task, and places the control blocks into the proper task queue. The transaction interface forms a dispatcher message control block and places it into the scheduler/dispatcher queue to initiate the task. If there are no other message control blocks in the queue particular for the called task, the called task is immediately started. Otherwise, the message control block waits in the queue to eventually be operated on.

State machine driven transport protocol interface

A system architecture for a high speed serial bus compatible with the 1394 standard is disclosed. A transaction interface coordinates data packets received from or sent to a 1394 bus. A kernel/scheduler/dispatcher is used to allocate memory resources, and start a variety of tasks and services. The tasks and services vary depending on protocols used in a transport layer and application layer used in conjunction with the 1394 layers. Each task operates according to a state machine progression. The transaction interface accepts data information from the tasks and forms data packets for delivery to the 1394 bus. The data packets are initially sent via an associated hardware register, but if busy, the transaction interface polls for other available registers. In addition, all queued transactions are loaded into registers in the most expedient manner.

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San Jose, CA, United States of America

Peter Groz