Error detection system
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 improving error detection in a communication system, the method comprising:
receiving a signal from a transmitter at a receiver wherein the signal comprises a data portion and a result of a hash function wherein the hash function is computed in part from a transmitter identification code, and wherein the signal is spread with a gold code that is specific to the transmitter;
determining if the result of the hash function matches both the data portion and the transmitter identification code of the transmitter; and
discarding the signal if the result of the hash function does not match both the data portion and the transmitter identification code of the transmitter.
2. The method of claim 1 , wherein the result of the hash function is computed in part from the gold code, and further comprising discarding the signal if the result of the hash function received at the receiver does not match the gold code.
3. The method of claim 1 , wherein the hash function is a cyclic redundancy check.
4. The method of claim 1 , wherein the hash function is initialized to the transmitter identification code.
5. The method of claim 1 , wherein the transmitter identification code is specific to a transmission frequency.
6. The method of claim 1 , wherein the signal is discarded at a physical layer before being passed to a media access control layer.
7. The method of claim 1 , wherein the transmitter identification code is received at the receiver during initialization.
8. The method of claim 1 , where the transmitter identification code is transmitted to the receiver as part of a roaming list, wherein the roaming list comprises a plurality of entries, wherein each entry comprises one or more receive parameter.
9. A node comprising:
a receiver configured to:
receive a signal from a transmitter wherein the signal comprises a data portion and a result of a hash function wherein the hash function is computed in part from a transmitter identification code, and wherein the signal is spread with a gold code that is specific to the transmitter;
determine if the result of the hash function matches both the data portion and the transmitter identification code of the transmitter; and
discard the signal if the result of the hash function does not match both the data portion and the transmitter identification code of the transmitter.
10. The node of claim 9 , wherein the result of the hash function is computed in part from the gold code, and wherein the receiver is further configured to discard the signal if the result of the hash function received at the receiver does not match the gold code.
11. The node of claim 9 , wherein the hash function is a cyclic redundancy check.
12. The node of claim 9 , wherein the transmitter identification code is specific to a transmission frequency.
13. The node of claim 9 , wherein the transmitter identification code is received at the receiver during initialization.
14. The node of claim 9 , wherein the transmitter identification code is transmitted to the receiver as part of a roaming list, wherein the roaming list comprises a plurality of entries, wherein each entry comprises one or more receive parameter.
15. A system comprising:
an access point configured to:
transmit a signal wherein the signal comprises a data portion and a result of a hash function wherein the hash function is computed in part from a transmitter identification code, and wherein the signal is spread with a gold code that is specific to the access point; and
a node configured to:
receive the signal from the access point,
determine if the result of the hash function matches both the data portion and the transmitter identification code of the access point, and
discard the signal if the result of the hash function does not match both the data portion and the transmitter identification code of the access point.
16. The system of claim 15 , wherein the result of the hash function is computed in part from the gold code, and wherein the node is further configured to discard the signal if the result of the hash function received at the node does not match the gold code.
17. The system of claim 15 , wherein the transmitter identification code is specific to a transmission frequency.