Signal processing method in wireless communication system and relay node therefor
A method is described for operating a device in a wireless communication system. The device communicates with a base station using a subframe for the device only; detects, by the device, a problem with a connection between the device and the base station. The device starts a timer upon detecting the problem with the connection between the device and the base station. The device releases a restriction of using the subframe for the device only, if the timer expires. The problem with the connection between the device and the base station is associated with a radio link failure. The detection of a problem with the connection between the device and the base station comprises detecting consecutive out-of-sync indications.
1. A method for operating a device relay node in a wireless communication system, the method comprising:
communicating, by the relay node, with a base station using a radio resource in a subframe configured for the relay node only;
detecting, by the relay node, a problem with a connection between the relay node and the base station by detecting consecutive out-of-sync indications;
starting, by the relay node, a timer upon detecting the problem with the connection between the relay node and the base station; and
releasing, by the relay node, a restriction of using the subframe configured for the relay node only, when the timer expires.
2. The method of claim 1 , wherein the problem with the connection between the relay node and the base station is associated with a radio link failure.
3. The method of claim 1 , further comprising:
communicating, by the relay node, with the base station using any subframe when the started timer expires.
4. The method of claim 1 , wherein the step of releasing the restriction comprises:
releasing a configuration of using the subframe configured for the relay node only.
5. The method of claim 1 , further comprising:
performing, by the relay node, a recovery of the problem with the connection between the relay node and the base station while the timer is running.
6. The method of claim 5 , wherein the timer is stopped when the problem with the connection between the relay node and the base station is recovered.
7. The method of claim 6 , wherein the problem with the connection between the relay node and the base station is recovered after detecting consecutive in-sync indications.
8. A node in a wireless communication system, the relay node comprising:
a timer; and
a processor operatively connected to the timer and configured to:
communicate with a base station using a radio resource in a subframe configured for the relay node only,
detect a problem with a connection between the relay node and the base station by detecting consecutive out-of-sync indications,
start the timer upon detecting the problem with the connection between the relay node and the base station, and
release a restriction of using the subframe configured for the relay node only, when the timer expires.
9. The relay node of claim 8 , wherein the problem with the connection between the relay node and the base station is associated with a radio link failure.
10. The relay node of claim 8 , wherein the processor is further configured to communicate with the base station using any subframe when the timer expires.
11. The relay node of claim 8 , wherein a configuration of using the subframe configured for the relay node only is released when the timer expires.
12. The relay node of claim 8 , wherein the processor is further configured to perform a recovery of the problem with the connection between the device relay node and the base station while the timer is running.
13. The relay node of claim 12 , wherein the timer is stopped when the problem with the connection between the relay node and the base station is recovered.
14. The relay node of claim 13 , wherein the problem with the connection between the relay node and the base station is recovered after detecting consecutive in-sync indications.