User data broadcast mechanism
This disclosure relates to method, device and system for detecting errors in a communication system. A signal is received from a transmitter at a receiver wherein the signal includes a data portion and a result of a hash function. The hash function is computed in part from a transmitter identification code. The receiver determines if the result of the hash function matches both the data portion and the transmitter identification code. The receiver discards the signal if the result of the hash function does not match both the data portion and the transmitter identification code of the transmitter.
1. A method of compensating for information not received in a communication system, the method comprising:
creating an encoded signal at a transmitter from a source signal using a forward error correction technique, wherein the encoded signal is identical to a second encoded signal created at a second transmitter;
splitting the encoded signal into a plurality of units;
spreading a first unit of the plurality of units;
transmitting the first unit of the plurality of units to a first receiver and a second receiver; and
determining whether the first unit of the plurality of units should be transmitted based in part on a first received acknowledgement message from the first receiver and a second received acknowledgement message from the second receiver, wherein the first received acknowledgement message is received at a first time based on a slot start time and a first random timing offset, wherein the first received acknowledgement message is received while at least a portion of a second signal is received from a second node, and wherein the second signal is received at a second time based upon the slot start time and a second random timing offset.
2. The method of claim 1 , further comprising determining whether the first unit of the plurality of units should be transmitted based in part on a predetermined number of units that should be transmitted.
3. The method of claim 2 , wherein the predetermined number of units is a minimum number of units needed to decode the source signal.
4. The method of claim 2 , wherein the predetermined number of units is a worst-case number of units needed for a receiver with a worst-case link to decode the source signal.
5. The method of claim 2 , wherein the predetermined number of units is adjusted based on a feedback signal from the first receiver.
6. The method of claim 1 , wherein the forward error correction technique uses a plurality of systematic symbols and a plurality of parity symbols.
7. The method of claim 1 , wherein the forward error correction technique comprises a Reed Solomon encoding technique.
8. The method of claim 1 , wherein the source signal is a component of a code load.
9. An access point comprising:
a processor configured to:
create an encoded signal from a source signal using a forward error correction technique, wherein the encoded signal is identical to a second encoded signal created at a second access point; and
split the encoded signal into a plurality of units; and
a transmitter operatively coupled to the processor and configured to:
spread a first unit of the plurality of units; and
transmit the first unit of the plurality of units to a first receiver and a second receiver; and
wherein the processor is further configured to determine whether the first unit of the plurality of units should be transmitted based in part on a first received acknowledgement message from the first receiver and a second received acknowledgement message from the second receiver, wherein the first received acknowledgement message is received at a first time based on a slot start time and a first random timing offset, wherein the first received acknowledgement message is received while at least a portion of a second signal is received from a second node, and wherein the second signal is received at a second time based upon the slot start time and a second random timing offset.
10. The access point of claim 9 , wherein the processor is further configured to determine whether the first unit of the plurality of units should be transmitted based in part on a predetermined number of units that should be transmitted.
11. The access point of claim 10 , wherein the predetermined number of units that should be transmitted is a minimum number of units needed to decode the source signal.
12. The access point of claim 9 , wherein the forward error correction technique comprises a Reed Solomon encoding technique.