Transmission device, transmission reception system and control method for transmission reception system
A transmission device includes, a receiver that receives availability information of each of a plurality of first transmission paths, and a transmitter that divides data into a plurality of transmission blocks, groups the plurality of transmission blocks into a plurality of slices, each of the plurality of slices include a distinct subset of the plurality of transmission blocks, when the availability information indicates that each of the plurality of first transmission paths has an error occurrence below a threshold value, transmits a different one of the plurality of slices to each of the plurality of first transmission paths.
1. A transmission device comprising:
a receiver configured to receive availability information of each of a plurality of first transmission paths; and
a transmitter configured to
divide data into a plurality of transmission blocks,
when the availability information indicates that each of the plurality of first transmission paths has an error occurrence below a threshold value, transmit a different one of the plurality of transmission blocks to each of the plurality of first transmission paths, and
when the availability information indicates that one of the plurality of first transmission paths has an error occurrence above the threshold value and another one of the plurality of first transmission paths has an error occurrence below the threshold value, transmit the same transmission block from among the plurality of transmission blocks to both the one of the plurality of first transmission path that has an error occurrence above the threshold value and the another one of the plurality of first transmission paths that has an error occurrence below the threshold value.
2. The transmission device according to claim 1 , wherein the receiver is further configured to receive availability information from each of a plurality of second transmission paths.
3. The transmission device according to claim 1 , wherein the transmitter is further configured to group the plurality of transmission blocks into a plurality of slices, each of the plurality of slices include a distinct subset of the plurality of transmission blocks, and transmit information indicating the transmission blocks included in each of the plurality of slices, and the transmission blocks are configured to be transmitted in the each of the plurality of the slice.
4. The transmission device according to claim 1 , wherein
the transmitter transmits information indicating a method of the distribution to each of the plurality of first transmission paths.
5. The transmission device according to claim 1 , wherein
the receiver receives a plurality of reception blocks from the plurality of second transmission paths and generates the availability information of each of the plurality of second transmission paths based on an error occurrence frequency of each of the plurality of second transmission paths, and
the transmitter transmits the availability information of each of the plurality of second transmission paths to each of the plurality of first transmission paths.
6. The transmission device according to claim 1 , wherein
the transmitter transmits error checking information of the transmission block to be transmitted, to each of the plurality of first transmission paths, and
the receiver receives the error checking information from each of the plurality of second transmission paths and calculates the error occurrence frequency of each of the plurality of second transmission paths based on the error checking information.
7. The transmission device according to claim 1 , wherein
the receiver receives the information indicating the method of distributing the plurality of reception blocks to the plurality of second transmission paths, from each of the plurality of second transmission paths and recovers the data by combining the plurality of reception blocks based on the received information indicating the method of the distribution.
8. The transmission device according to claim 1 , wherein
the transmitter adds the availability information of each of the plurality of second transmission paths to the distributed transmission block and transmits the transmission block to each of the plurality of first transmission paths.
9. The transmission device according to claim 1 , further comprising
a packet output circuit configured to regularly output a data link layer packet to the transmitter as the data, wherein
in a case where an interval at which the receiver receives the data from the plurality of second transmission paths is equal to or larger than a threshold value, the transmitter increases the number of first transmission paths each of which transmits a same transmission block as another first transmission path among the plurality of first transmission paths.
10. A transmission reception system comprising:
a transmission device, including
a first receiver configured to receive availability information of each of a plurality of first transmission paths from a reception device via each of a plurality of second transmission paths, and
a first transmitter configured to divide data into a plurality of transmission blocks,
when the availability information indicates that each of the plurality of first transmission paths has an error occurrence below a threshold value, transmitting a different one of the plurality of transmission blocks to each of the plurality of first transmission paths, and
when the availability information indicates that one of the plurality of first transmission paths has an error occurrence above the threshold value and another one of the plurality of first transmission paths has an error occurrence below the threshold value, transmitting the same transmission block from among the plurality of transmission blocks to both the one of the plurality of first transmission path that has an error occurrence above the threshold value and the another one of the plurality of first transmission paths that has an error occurrence below the threshold value; and
the reception device including
a second receiver configured to receive the plurality of transmission blocks from the plurality of first transmission paths and generating the availability information of each of the plurality of first transmission paths based on an error occurrence frequency of each of the plurality of first transmission paths, and
a second transmitter configured to transmit the availability information of each of the plurality of first transmission paths to each of the plurality of second transmission paths.
11. The transmission reception system according to claim 10 , wherein
the first transmitter transmits error checking information of the transmission block to be transmitted, to each of the plurality of first transmission paths, and
the second receiver receives the error checking information from each of the plurality of first transmission paths and calculates the error occurrence frequency of each of the plurality of first transmission paths based on the error checking information.
12. The transmission reception system according to claim 10 , wherein
the first transmitter transmits information indicating a method of the distribution to each of the plurality of first transmission paths, and
the second receiver receives the information indicating the method of the distribution from each of the plurality of first transmission paths and recovers the data by combining the plurality of transmission blocks based on the information indicating the method of the distribution.
13. The transmission reception system according to claim 10 , wherein
the second transmitter divides the data into a plurality of blocks, distributes the plurality of blocks to the plurality of second transmission paths, adds the availability information of each of the plurality of first transmission paths to each of the distributed blocks, and transmits the block to each of the plurality of second transmission paths.
14. The transmission reception system according to claim 10 , wherein
the reception device includes a packet output circuit configured to regularly output a data link layer packet to the second transmitting circuit as the data, and
in a case where an interval at which the first receiver receives the data from the plurality of second transmission paths is equal to or larger than a threshold value, the first transmitter increases the number of first transmission paths each of which transmits a same block as another first transmission path among the plurality of first transmission paths.
15. A control method for a transmission reception system including a transmission device and a reception device, the method comprising:
receiving, by a first receiver in the transmission device, availability information of each of a plurality of first transmission paths from the reception device via each of a plurality of second transmission paths;
dividing, by a first transmitter in the transmission device, data into a plurality of transmission blocks;
when the availability information indicates that each of the plurality of first transmission paths has an error occurrence below a threshold value, transmitting a different one of the plurality of transmission blocks to each of the plurality of first transmission paths, and
when the availability information indicates that one of the plurality of first transmission paths has an error occurrence above the threshold value and another one of the plurality of first transmission paths has an error occurrence below the threshold value, transmitting the same transmission block from among the plurality of transmission blocks to both the one of the plurality of first transmission path that has an error occurrence above the threshold value and the another one of the plurality of first transmission paths that has an error occurrence below the threshold value;
receiving, by a second receiver in the reception device, the plurality of transmission blocks from the plurality of first transmission paths;
generating, by the second receiver in the reception device, the availability information of each of the plurality of first transmission paths based on an error occurrence frequency of each of the plurality of first transmission paths; and
transmitting, by a second transmitter in the reception device, the availability information of each of the plurality of first transmission paths to each of the plurality of second transmission paths.