Method and device for retransmission
Embodiments related to retransmission in a communication system are described and depicted. In one embodiment, a retransmission entity repeats a transmission of a data transfer unit by the device after a predetermined number of other transmitted data transfer units has been transmitted. The retransmission entity may also determine whether a measure for a time period since the first transmission of the data transfer unit by the device has exceeded a predetermined threshold and to provide a final transmission of the data transfer unit based on the determining that the measure for the time period has exceeded the predetermined threshold.
1. A digital subscriber line (DSL) noise protection apparatus, the apparatus comprising:
first circuitry configured to receive data transfer units including at least one data transfer unit corrupted by noise;
second circuitry configured to generate a retransmission return message with a number of the data transfer units acknowledged;
wherein the second circuitry is configured to determine a start of the data transfer units acknowledged based on a look back value; and
wherein the second circuitry is configured to use a value of a delay between transmissions of a data transfer unit as the look back value.
2. The apparatus of claim 1 , wherein the second circuitry is configured to use a value of the delay between consecutive transmissions of the data transfer unit as the look back value.
3. The apparatus of claim 1 , wherein the second circuitry is configured to use Qtx a value of the delay between transmissions of the data transfer unit as the look back value.
4. The apparatus of claim 1 , wherein the look back value is based on a length of a retransmission queue.
5. The apparatus of claim 1 , wherein the second circuitry is configured to obtain the number from a non-acknowledgment signal field in the retransmission return message.
6. The apparatus of claim 1 , wherein the second circuitry includes a framer.
7. The apparatus of claim 1 , wherein the second circuitry includes a retransmission queue.
8. The apparatus of claim 1 , wherein the second circuitry includes a multiplexer.
9. The apparatus of claim 1 , wherein the second circuitry is further configured to determine when one of the data transfer units is to pass a predefined point in a transmission protocol based on a timestamp.
10. The apparatus of claim 1 , wherein the first circuitry is configured to receive the at least one data transfer units corrupted by impulse noise.
11. A digital subscriber line (DSL) noise protection apparatus, the apparatus comprising:
first circuitry configured to transmit data transfer units;
second circuitry configured to generate a retransmission return message with a number of acknowledged data transfer units;
wherein the second circuitry is configured to determine a start of the acknowledged data transfer units based on a look back value; and
wherein the second circuitry is configured to use a value of a delay between transmissions of a data transfer unit as the look back value.
12. The apparatus of claim 11 , wherein the second circuitry is configured to use a value of the delay between consecutive transmissions of the data transfer unit as the look back value.
13. The apparatus of claim 11 , wherein the second circuitry is configured to use Qtx a value of the delay between transmissions of the data transfer unit as the look back value.
14. The apparatus of claim 11 , wherein the look back value is based on a length of a retransmission queue.
15. The apparatus of claim 11 , wherein the second circuitry is configured to obtain the number from a non-acknowledgment signal field in the retransmission return message.
16. The apparatus of claim 11 , wherein the first circuitry includes a framer.
17. The apparatus of claim 11 , wherein the second circuitry includes a retransmission queue.
18. The apparatus of claim 11 , wherein the second circuitry includes a multiplexer.
19. The apparatus of claim 11 , wherein the first circuitry is further configured to determine when one of the data transfer units is to pass a predefined point in a transmission protocol based on a timestamp.
20. The apparatus of claim 11 , wherein the second circuitry is configured to generate the retransmission return message with the number of acknowledged data transfer units not corrupted by impulse noise.
21. A digital subscriber line (DSL) noise protection apparatus, the apparatus comprising:
retransmission circuitry configured to generate a retransmission return message with a number of the data transfer units acknowledged that are not corrupted by noise;
logic circuitry is configured to determine a start of the data transfer units acknowledged based on a look back value; and
wherein the logic circuitry is configured to use a value of a delay between transmissions of a data transfer unit as the look back value.
22. A digital subscriber line (DSL) noise protection system, the system comprising:
a first communication device configured to prepare data transfer units to be transmitted;
a second communication device configured to receive the data transfer units transmitted including at least one data transfer unit corrupted by noise;
wherein the second communication device is configured to generate a retransmission return message with a number of the data transfer units acknowledged;
wherein the second communication device is configured to determine a start of the data transfer units acknowledged based on a look back value; and
wherein the second communication device is configured to use a value of a delay between transmissions of a data transfer unit as the look back value.
23. A digital subscriber line (DSL) noise protection method, the method comprising:
receiving data transfer units including at least one data transfer unit corrupted by noise;
generating a retransmission return message with a number of the data transfer units acknowledged;
determining a start of the data transfer units acknowledged based on a look back value that is a delay between transmissions of a data transfer unit.
24. The method of claim 23 , further comprising determining when one of the data transfer units is to pass a predefined point in a transmission protocol based on a timestamp.
25. The method of claim 23 , further comprising receiving the at least one data transfer units corrupted by impulse noise.