Transitioning of a port in a communications system from an active state to a standby state
AssigneeAgere Systems Inc.
InventorsJinsong Liu, Qiangao Xu, Haifeng Zhou, Wen Zhu
Life of this patent
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Abstract
A method of transitioning a port in a communication system from an active state to a standby state includes the steps of transmitting a signal to transition the port to the standby state, and, upon transmission of the signal to transition the port to the standby state, transitioning the port from the active state into the standby state without entering a suspended state. The port may be a physical layer interface port and the communication system may be an IEEE 1394-compliant communication system.
Claims27
A method of transitioning a port in a communication system from an active state to a standby state, the method comprising the steps of:
- transmitting a signal to transition the port to the standby state;
- and
- upon transmission of the signal to transition the port to the standby state, ensuring that the port transitions from the active state to the standby state without entering a suspended state.
A method of transitioning a port in a communication system from an active state to a standby state, the method comprising the steps of:
- transmitting a signal to transition the port to the standby state;
- upon transmission of the signal to transition the port to the standby state, transitioning the port from the active state to the standby state without entering a suspended state;
- and
- ensuring that the suspended state is not entered when a first variable “rx_ok” is FALSE except when a second variable “do_standby” is also FALSE.
A method of transitioning a port in a communication system from an active state to a standby state, the method comprising the steps of:
- transmitting a signal to transition the port to the standby state;
- upon transmission of the signal to transition the port to the standby state, transitioning the port from the active state to the standby state without entering a suspended state;
- and
- ensuring that the standby state is entered regardless of a value of a variable “rx_ok.”
A device for use in a communication system, the device comprising:
- at least a first port;
- memory;
- and
- at least one processor coupled to the memory and to the at least first port, the at least one processor being configured:
- to cause the at least first port to transmit a signal to transition at least a second port to a standby state from an active state;
- and, upon transmission of the signal to transition the at least second port from the active state to the standby state, to ensure that the at least first port transitions from the active state into the standby state without entering a suspended state.
A device for use in a communication system, the device comprising:
- at least a first port;
- memory;
- and
- at least one processor coupled to the memory and to the at least first port, the at least one processor being configured:
- to cause the at least first port to transmit a signal to transition at least a second port to a standby state from an active state;
- and, upon transmission of the signal to transition the at least second port from the active state to the standby state, to transition the at least first port from the active state into the standby state without entering a suspended state;
- wherein the at least one processor is operative to transition the at least first port from the active state to the standby state without evaluating a variable “rx_ok.”
A device for use in a communication system, the device comprising:
- at least a first port;
- memory;
- and
- at least one processor coupled to the memory and to the at least first port, the at least one processor being configured:
- to cause the at least first port to transmit a signal to transition at least a second port to a standby state from an active state;
- and, upon transmission of the signal to transition the at least second port from the active state to the standby state, to transition the at least first port from the active state into the standby state without entering a suspended state;
- wherein the at least one processor is operative to implement a transition of the at least first port from the active state to the standby state in accordance with a condition (do_standby && signaled && !force_disconnect), where “&&” represents a logical AND function, “!” represents a logical complement, and “do_standby,” “signaled,” and “force_disconnect” are variables used in implementing a port connection state machine.
A data communication system, comprising:
- at least one port adapted for at least one of transmitting data to at least one other port and receiving data from the at least one other port;
- and
- at least one controller coupled to the port, the controller being operative to ensure that the at least one port transitions from an active state to a standby state without entering a suspended state.
Dependencies are inferred from the claim text.