Back to results
US 7,889,647 B2Granted
Switching apparatus for switching real-time packet in real time and packet switching method
AssigneeCanon Kabushiki Kaisha
InventorsJun Kawashima, Kazuhiko Morimura, Kenichi Morikawa
Life of this patent
Estimating the term…
Abstract
A switching apparatus includes an identification device for identifying received real-time packets; a measurement device for measuring a reception interval of the real-time packets according to the identification identified by the identification device; and an output device for giving priority to the real-time packets over other types of packets and outputting the real-time packet by priority based on the measurement measured by the measurement device.
Claims6
A switching apparatus comprising:
- a determination device for determining whether or not received packets are real-time packets;
- a detection device for detecting real-time packets that do not vary from a transmission cycle of the real-time packets by a source apparatus and that are keeping the transmission cycle of the real-time packets by the source apparatus, among the real-time packets determined by the determination device;
- a measurement device for measuring a reception cycle between the real-time packets that do not vary based on a reception time of a real-time packet that does not vary and a next reception time of a next real-time packet that does not vary;
- an expecting device for expecting reception timings that subsequent real-time packets that do not vary are to be received based on the reception cycle measured by the measurement device;
- an inhibiting device for inhibiting a transmission of non-real-time packets, so as not to transmit the non-real-time packets at the reception timings expected by the expecting device;
- and
- a switching device for switching a series of real-time packets that do not vary after measurement by the measurement device at the transmission cycle that is keeping the transmission cycle of the real-time packets by the source apparatus.
4 more elements
The switching apparatus according to claim
- wherein the switching device switches the non-real-time packets after switching the real-time packets.
A packet switching method comprising steps of:
- determining whether or not received packets are real-time packets;
- detecting real-time packets that do not vary from a transmission cycle of the real-time packets by a source apparatus and that are keeping the transmission cycle of the real-time packets by the source apparatus, among the real-time packets determined in the determination step;
- measuring a reception cycle between the real-time packets that do not vary based on a reception time of a real-time packet that does not vary and a next reception time of a next real-time packet is that does not vary;
- causing an expecting device to expect reception timings that subsequent real-time packets that do not vary are to be received based on the reception cycle measured in the measuring step;
- inhibiting a transmission of non-real-time packets, so as not to transmit a the non-real-time packets at the reception timings expected by the expecting device;
- and
- switching a series of real-time packets that do not vary after measurement in the measuring step at the transmission cycle that is keeping the transmission cycle of the real-time packets by the source apparatus.
4 more elements
Dependencies are inferred from the claim text.