Radio Link Monitoring in DRX
AssigneeTelefonaktiebolaget LM Ericsson (publ)
InventorsMats Sågfors, Vera Vukajlovic Kenehan
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Abstract
The present invention provides a higher protocol layer, e.g. Layer 3, filter mechanism, where a counter mechanism applied in the filter adapts an incremental or decremental process of the relevant counter or counters to the inter-arrival time of the consecutive out of synch resp. in synch indications from a lower protocol layer, e.g. Layer 1, since the indications from the lower protocol layer may arrive to the higher-layers with irregular arrival times.
Claims14
1-13. (canceled)
A method for radio link monitoring in a User Equipment configured to operate in discontinuous reception mode, wherein a higher protocol layer receives indications from a lower protocol layer regarding radio link problems and recovery from those problems, wherein the method comprises:
- at the higher protocol layer, receiving from the lower protocol layer one or more indications of a radio link problem;
- adjusting, for each received indication, a first counter with a value that depends on the time elapsed since having last received an indication of a radio link problem from the lower protocol layer that caused adjustment of the first counter;
- and
- recognizing a radio link problem at the higher protocol level responsive to the first counter reaching a first level.
A User Equipment configured to operate in discontinuous reception mode and to count at a higher protocol layer indications received from a lower protocol layer regarding radio link problems and recovery from those problems, comprising
- a first unit configured to receive, at the higher protocol layer and from the lower protocol layer one or more indications of a radio link problem;
- a first counter configured, for each received indication, to be adjusted with a value that depends on the time elapsed since having last received an indication of a radio link problem from the lower protocol layer that caused adjustment of the first counter;
- and
- a second unit configured to recognize a radio link problem at the relatively higher protocol level responsive to the first counter reaching a first level.
Dependencies are inferred from the claim text.