Cooperative concatenated coding for wireless systems
View Patent ↗Cooperative concatenated coding techniques are provided for wireless communications between at least two users and a base station. A network system employing cooperative concatenated coding includes cooperating user devices each configured to encode and transmit at least a potion of a joint message. The joint message includes at least a potion of a first message from a first cooperating user device and at least a potion of a second message from a second cooperating user device. An embodiment includes encoding a first message from a first cooperating user, receiving a second message from a second cooperating user and decoding the second message. The methodology also includes re-encoding at least a potion of the decoded message with at least a potion of the first message to form a combined message, and then transmitting at least a potion of the combined message.
1. A method, comprising:
encoding a first message;
decoding a second message from a cooperating device;
re-encoding at least a potion of the second message from the cooperating device with at least a potion of the first message to form a combined message; and
transmitting at least a subset of the combined message over a single channel.
2. The method of claim 1 , wherein the transmitting includes transmitting at least a potion of the combined message to a base station.
3. The method of claim 2 , wherein the transmitting at least the potion includes transmitting the first message to the base station.
4. The method of claim 1 , further comprising detecting a decoding failure.
5. The method of claim 4 , wherein the transmitting includes transmitting the first message in response to detecting the decoding failure.
6. A device, comprising:
a wireless communications component configured to receive at least one message from a cooperating device;
an encoder configured to encode a message generated by the device; and
a decoder configured to decode the at least one message from the cooperating device into at least one decoded message,
wherein the encoder re-encodes at least a potion of the at least one decoded message together with at least a potion of the message to form a combined message for transmission over a single channel.
7. The device of claim 6 , wherein the combined message is based on a recursive systematic convolutional inner code.
8. The device of claim 6 , wherein the combined message is based on a cooperative serial concatenated convolutional code.
9. The device of claim 6 , wherein the wireless communications component is configured to transmit at least a potion of the combined message to a base station.
10. The device of claim 9 , wherein the wireless communications component is configured to transmit the message generated by the device to the base station.
11. The device of claim 6 , wherein the message generated by the device and the at least one message from the cooperating device comprise unique message block lengths.
12. The device of claim 6 , wherein the wireless communications component transmits one or more parity bits of the combined message over the single channel.
13. The device of claim 6 , wherein the encoder or the decoder includes a pseudo-random interleaver.
14. The device of claim 6 , wherein the encoder re-encodes at least the potion of the at least one decoded message and at least a potion of another decoded message from another cooperating device together with at least the potion of the message to form the combined message.
15. A non-transitory computer-readable storage medium having computer-executable instructions stored thereon that, in response to execution, cause a computing system to perform operations, comprising:
encoding a first message;
decoding a second message from a partner device;
re-encoding at least a potion of the second message from the partner device with at least a potion of the first message to form a joint message; and
transmitting at least a potion of the joint message over a single channel.
16. The non-transitory computer-readable storage medium of claim 15 , further comprising transmitting at least a potion of the joint message to at least one other device.
17. The non-transitory computer-readable storage medium of claim 15 , further comprising transmitting the first message to at least one other device.
18. The non-transitory computer-readable storage medium of claim 15 , further comprising detecting a communications failure.
19. The non-transitory computer-readable storage medium of claim 18 , further comprising transmitting the first message in response to detecting the communications failure.
20. A system, comprising:
means for encoding a first message;
means for decoding a second message from a cooperating device;
means for re-encoding at least a potion of the second message from the cooperating device with at least a potion of the first message to form a combined message; and
means for transmitting at least a subset of the combined message over a single channel.