Priority data transfer method
First Claim
1. A priority data transfer method comprising the steps of:
- determining the stepwise priority level of collided packet; and
resending the collided packet based on the priority level.
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Accused Products
Abstract
When a send packet from a slave station and a send packet from a relay station are simultaneously sent to other relay station, the collision of the send packets against each other is detected, and the backoff time of the collided packet is calculated based on the hop count recorded in a hop count recording field of the collided packet. Therefore, the backoff time is set so that the backoff time decreases with increasing the hop count. This increases the probability of resending of the packet without collision with other packet in the resending processing, and enables the packet having a larger hop count to be preferentially sent. By virtue of this construction, a priority data transfer method can be realized which, when collision of a packet against other packet has occurred, performs resend processing based on the priority level of the packet.
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Citations
13 Claims
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1. A priority data transfer method comprising the steps of:
- determining the stepwise priority level of collided packet; and
resending the collided packet based on the priority level. - View Dependent Claims (13)
- determining the stepwise priority level of collided packet; and
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2. A priority data transfer method for a communication system using random access control, said priority data transfer method comprising the steps of:
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detecting collision of a send packet against other packet on a transmission line (a collision detection step);
upon the detection of the collision of the packet against other packet in the collision detection step, generating a random number (a random number generation step);
judging the priority level of the send packet (a priority level judging step);
generating a delay time, which elapses until the send packet is resent, based on the random number generated in the random number generation step and the priority level of the send packet judged in the priority level judging step (a delay time generation step); and
resending the packet after the elapse of the delay time generated in the delay time generation step. - View Dependent Claims (3, 4, 5, 6, 7, 8, 9, 10, 11, 12)
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Specification