Systems and methods for equalizing retransmission delays for data retransmission over bonded modems
Embodiments of the present invention provide systems for incorporating bonding processors while avoiding bonding processor buffer overflow by initiating retransmission requests on all data lines whenever corrupted data is encountered on one data line. Initiating these “extra” retransmission requests equalizes retransmissions delays over all transmission lines, preventing the bonding processor from receiving excess data that cannot be reassembled until the retransmission request is processed.
1. A system comprising:
a bonding processor;
a first reception modem coupled to the bonding processor, wherein the first reception modem is in communication with a first transmission modem;
a second reception modem coupled to the bonding processor, wherein the second reception modem is in communication with a second transmission modem; and
a retransmission equalization module (REM) coupled to the second reception modem, wherein the REM is configured to:
detect a transmission error in data received from the first reception modem,
initiate a first retransmission of data from the first transmission modem responsive to detecting the transmission error in the data received from the first reception modem, and
initiate a second retransmission of data from the second transmission modem responsive to detecting the transmission error in the data received from the first reception modem.
2. The system of claim 1 , wherein the first reception modem, second reception modern, first transmission modem, and second transmission modem are DSL modems.
3. The system of claim 1 , wherein the REM is further configured to determine a first bit rate for data from the first reception modem and a second bit rate for data from the second reception modem.
4. The system of claim 3 , wherein the REM is further configured to select the data for the second retransmission of data based on the determined first bit rate and second bit rate.
5. The system of claim 1 , wherein the transmission error in the data is a transmission error in a first data transmission unit (DTU), and wherein the second retransmission of data is a retransmission of a second DTU.
6. The system of claim 1 , wherein the REM is further configured to initiate the first retransmission of data simultaneously with the second retransmission of data.
7. A system comprising:
a first bonding processor;
a first transmission modem coupled to the first bonding processor;
a second transmission modem coupled to the first bonding processor; and
a retransmission equalization module (REM) coupled to the first transmission modem and the second transmission modem, wherein the REM is configured to:
detect a retransmission request sent to the first transmission modern,
initiate a first retransmission of data from the first transmission modem responsive to detecting the retransmission request, and
initiate a second retransmission of data from the second transmission modem responsive to detecting the retransmission request.
8. The system of claim 7 , wherein the first transmission modem and second transmission modem are DSL modems.
9. The system of claim 7 , wherein the REM is further configured to determine a first bit rate for data transmitted from the first transmission modem and a second bit rate for data transmitted from the second transmission modem.
10. The system of claim 9 , wherein the REM is further configured to select the data for the second retransmission based on the determined first bit rate and second bit rate.
11. The system of claim 7 , wherein the retransmission request is a retransmission request for a first data transmission unit (DTU), and wherein the second retransmission of data is a retransmission of a second DTU.
12. The system of claim 7 , wherein the REM is further configured to simultaneously initiate the first retransmission and the second retransmission of data.
13. A method comprising:
receiving a first set of data over a first transmission line and a second set of data over a second transmission line;
detecting a transmission error in a first portion of the first set of data;
initiating a first retransmission of the first portion of the first set of data responsive to detecting the transmission error; and
initiating a second retransmission of a second portion of the second set of data responsive to detecting the transmission error.
14. The method of claim 13 , further comprising:
detecting a retransmission request sent over the first transmission line; and
initiating the second retransmission of the second portion of the second set of data over the second transmission line responsive to detecting the retransmission request.
15. The method of claim 13 , further comprising:
determining a first bit rate for data transmitted over the first transmission line; and
determining a second bit rate for data transmitted over the second transmission line.
16. The method of claim 15 , further comprising selecting the second portion of the second set of data based on the determined first bit rate and second bit rate.
17. The method of claim 16 , wherein the first portion of the first set of data is a first data transmission unit (DTU) in the first set of data, and wherein the second portion of the second set of data is a second DTU in the second set of data.
18. The method of claim 13 , further comprising:
simultaneously initiating the first retransmission of the first portion of the first set of data and the second retransmission of the second portion of the second set of data responsive to detecting the transmission error.
19. The system of claim 7 , further comprising:
a second bonding processor;
a first reception modem coupled to the second bonding processor, wherein the first reception modem is in communication with the first transmission modem;
a second reception modem coupled to the second bonding processor, wherein the second reception modem is in communication with the second transmission modem, wherein the REM is configured to:
initiate the first retransmission of data from the first transmission modem to the first reception modem, and
initiate, simultaneously with the first retransmission of data, the second retransmission of data from the second transmission modem to the second reception modem.
20. The system of claim 1 , wherein the REM is further configured to:
instruct the bonding processor to stop receiving data when a buffer of the bonding processor has reached capacity.
21. The system of claim 20 , wherein the REM is further configured to:
in response to the buffer reaching capacity, match a first delay over a first communications channel between the first transmission modem and the first reception modem and a second delay over a second communications channel between the second transmission modem and the second reception modem.
22. The system of claim 20 , wherein the REM is further configured to:
in response to the buffer reaching capacity, initiate an extra retransmission of data from the first transmission modem or the second transmission modem.
23. The system of claim 1 , wherein the bonding processor is directly coupled to the first reception modem and the second reception modem.