JP2005223881A5

JP2005223881A5 -

Info

Publication number: JP2005223881A5
Application number: JP2004223870A
Authority: JP
Filing date: 2004-07-30
Publication date: 2007-04-12
Anticipated expiration: 2024-07-30

Claims

A communication method between a plurality of communication devices having an asynchronous transmission function and connected to a serial bus,
Determining, for each of the plurality of communication devices, allocation of a first communication device that does not enable the asynchronous transmission management function and a second communication device that enables the asynchronous transmission management function;
The first communication device constantly monitors a transaction transmitted to the second communication device, the transaction is a bandwidth allocation request for an asynchronous transfer bandwidth to the second communication device, and the second communication device When the communication device approves the bandwidth allocation request, the first communication device repeatedly stores the allocated bandwidth by converting it into a required time until transmission of the asynchronous stream packet is completed. And steps to
When transmitting an asynchronous stream packet from any one of the plurality of communication apparatuses, the communication apparatus transmits the asynchronous stream packet for the accumulated time required. A delaying step;
A communication method between communication apparatuses, comprising:

The second communication device receives a bandwidth acquisition request transaction from the first communication device that is less than or equal to the cycle period, and the sum of the bandwidth length requested in the transaction and the already authorized bandwidth length If the length of the available bandwidth is not exceeded, the bandwidth requested by the transaction is obtained from the available bandwidth, and the bandwidth is obtained for the first communication device. The communication method between communication apparatuses according to claim 1 , wherein notification is made.

A communication method between a plurality of communication devices having an asynchronous transmission function and connected to a serial bus,
Determining, for each of the plurality of communication devices, allocation of a first communication device that does not enable the asynchronous transmission management function and a second communication device that enables the asynchronous transmission management function;
Determining a management cycle in the asynchronous transmission management function enabled by the second communication device;
The first communication device always monitors a transaction transmitted to the second communication device, the transaction is an asynchronous transmission band allocation request to the second communication device, and the second communication When the device approves the bandwidth allocation request, the first communication device repeatedly stores the allocated bandwidth by converting it into a required time until transmission of the asynchronous stream packet is completed. Steps,
When transmitting an asynchronous stream packet from any one of the plurality of communication apparatuses, the communication apparatus transmits the asynchronous stream packet for the accumulated time required. Delaying transmission; and
A communication method between communication apparatuses, comprising:

The second communication device receives a bandwidth allocation request transaction less than the management cycle from the first communication device, and the length of the bandwidth requested by the transaction and the length of the already authorized bandwidth. When the total does not exceed the available bandwidth, the bandwidth requested by the transaction is obtained from the available bandwidth, and the bandwidth is obtained for the first communication device. The communication method between communication apparatuses according to claim 3 , wherein notification is made.

The available band is each of a plurality of bands obtained by partially dividing the entire band that can be used in the one cycle or the management cycle, or the entire band that can be used in the one cycle or the management cycle. communication method between a communication apparatus according to claim 2 or 4, wherein.

The second communication device removes the authorized bandwidth from the available bandwidth after a predetermined time has elapsed after receiving a bandwidth allocation request equal to or less than the available bandwidth from the first communication device. The communication method between communication apparatuses according to any one of claims 2 to 5, wherein a bandwidth acquisition request for acquiring the remaining bandwidth by the asynchronous transmission management function is performed.

Whenever the accumulated time required for the first communication device reaches its own communication cycle, the first communication device sends a periodic bandwidth allocation request transaction having the same bandwidth as the previously acquired asynchronous transfer bandwidth to the second communication device. communication method between a communication apparatus according to any one of claims 1 to 6, characterized in that transmitted to the communication device.

Wherein each of the serial bus, and the plurality of communication devices, the communication method between the communication device according to any one of claims 1 to 7, characterized in that it is a communication device that meets the specific communication standard.

A network in which a plurality of communication devices having an asynchronous transmission function are connected by a serial bus,
For each of the plurality of communication devices, determine allocation of a first communication device that does not enable the asynchronous transmission management function and a second communication device that enables the asynchronous transmission management function,
The first communication device constantly monitors a transaction transmitted to the second communication device, the transaction is a bandwidth allocation request for an asynchronous transfer bandwidth to the second communication device, and the second communication device When the communication device approves the bandwidth allocation request, the first communication device repeatedly stores the allocated bandwidth by converting it into a required time until transmission of the asynchronous stream packet is completed. And
When transmitting an asynchronous stream packet from any one of the plurality of communication apparatuses, the communication apparatus transmits the asynchronous stream packet for the accumulated time required. Delay,
A network characterized by that.

The second communication device receives a bandwidth acquisition request transaction from the first communication device that is less than or equal to the cycle period, and the sum of the bandwidth length requested in the transaction and the already authorized bandwidth length If the length of the available bandwidth is not exceeded, the bandwidth requested by the transaction is obtained from the available bandwidth, and the bandwidth is obtained for the first communication device. The network according to claim 9, wherein notification is made.

A network in which a plurality of communication devices having an asynchronous transmission function are connected by a serial bus,
For each of the plurality of communication devices, an allocation of a first communication device that does not enable the asynchronous transmission management function and a second communication device that enables the asynchronous transmission management function is determined.
Determining a management cycle in the asynchronous transmission management function enabled by the second communication device;
The first communication device always monitors a transaction transmitted to the second communication device, the transaction is an asynchronous transmission band allocation request to the second communication device, and the second communication If the device approves the bandwidth allocation request, the first communication device repeatedly stores the allocated bandwidth by converting it into a time required until transmission of the asynchronous stream packet is completed. ,
When transmitting an asynchronous stream packet from any one of the plurality of communication apparatuses, the communication apparatus transmits the asynchronous stream packet for the accumulated time required. Delay transmission,
A network characterized by that.

The second communication device receives a bandwidth allocation request transaction less than the management cycle from the first communication device, and the length of the bandwidth requested by the transaction and the length of the already authorized bandwidth. When the total does not exceed the available bandwidth, the bandwidth requested by the transaction is obtained from the available bandwidth, and the bandwidth is obtained for the first communication device. The network according to claim 11, wherein notification is made.

The available band is each of a plurality of bands obtained by partially dividing the entire band that can be used in the one cycle or the management cycle, or the entire band that can be used in the one cycle or the management cycle. The network according to claim 10 or 12, characterized in that

The second communication device removes the authorized bandwidth from the available bandwidth after a predetermined time has elapsed after receiving a bandwidth allocation request equal to or less than the available bandwidth from the first communication device. The network according to claim 10, wherein a bandwidth acquisition request for acquiring the remaining bandwidth by the asynchronous transmission management function is made.

Whenever the accumulated time required for the first communication device reaches its own communication cycle, the first communication device sends a periodic bandwidth allocation request transaction having the same bandwidth as the previously acquired asynchronous transfer bandwidth to the second communication device. The network according to claim 9, wherein the network is transmitted to the communication device.

The network according to claim 9, wherein each of the serial bus and the plurality of communication devices is a communication device that satisfies a specific communication standard.