Method and apparatus for LTE radio link failure determination in DRX mode
AssigneeInterDigital Patent Holdings, Inc.
InventorsJoseph S. Levy, Charles A. Dennean, Stephen E. Terry, Peter S. Wang, Jean-Louis Gauvreau, Shankar Somasundaram, Ulises Olvera-Hernandez, Paul Marinier, Guodong Zhang
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Abstract
A method and apparatus for detecting radio link failure (RLF) in a wireless transmit receive unit (WTRU) includes the WTRU performing a series of radio link measurements during a discontinuous reception (DRX) on-duration, comparing each of the series of radio link measurements to a threshold, and determining that the series of radio link measurements indicates an out-of-synch condition.
Claims18
A method of detecting radio link failure (RLF) in a wireless transmit receive unit (WTRU), the method comprising:
- performing a series of radio link measurements on a serving cell during discontinuous reception (DRX) mode;
- detecting a predetermined number of consecutive out-of-synch conditions based on the series of radio link measurements;
- starting a timer upon detecting the predetermined number of consecutive out-of-synch conditions;
- and
- while operating in DRX mode, continuing the series of radio link measurements on the serving cell using an evaluation period corresponding to non-DRX mode until an expiry or a stop of the timer.
A wireless transmit receive unit (WTRU) configured to determine a radio link failure, the WTRU comprising:
- a processor configured to:
- perform a series of radio link measurements on a serving cell during discontinuous reception (DRX) mode;
- detect a predetermined number of consecutive out-of-synch conditions based on the series of radio link measurements;
- start a timer upon detecting the predetermined number of consecutive out-of-synch conditions;
- and
- while operating in DRX mode, continue the series of radio link measurements on a serving cell using an evaluation period corresponding to non-DRX mode until an expiry or a stop of the timer.
Dependencies are inferred from the claim text.