User equipment and methods for fast handover failure recovery in 3GPP LTE network
First Claim
1. User Equipment (UE) comprising:
- physical layer circuitry and hardware processing circuitry configured to;
initiate handover (HO) failure recovery by transmission of a random-access channel (RACH) 2 message when both a radio-link failure (RLF) timer and a time- to trigger (TTT) timer are concurrently running,wherein the RACH 2 message is a message transmitted on a random-access channel for radio-resource control (RRC) connection re-establishment.
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Accused Products
Abstract
Embodiments of User Equipment (UE) and methods for fast handover failure recovery in a 3GPP LTE network are generally described herein. In some embodiments, the UE may initiate handover (HO) failure recovery by transmission of a random-access channel (RACH) 2 message when both a radio-link failure (RLF) timer and a time-to trigger (TTT) timer are concurrently running. The RACH 2 message may be a message transmitted on a random-access channel for radio-resource control (RRC) connection re-establishment. The RLF timer may be activated as part of a radio-link monitoring (RLM) process based on radio-link conditions with a serving cell, and the TTT timer may have been activated as part of a HO process based on a measurement reporting event.
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Citations
18 Claims
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1. User Equipment (UE) comprising:
physical layer circuitry and hardware processing circuitry configured to; initiate handover (HO) failure recovery by transmission of a random-access channel (RACH) 2 message when both a radio-link failure (RLF) timer and a time- to trigger (TTT) timer are concurrently running, wherein the RACH 2 message is a message transmitted on a random-access channel for radio-resource control (RRC) connection re-establishment. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8)
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9. A method for fast handover failure recovery performed by User Equipment (UE), the method comprising:
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initiating handover (HO) failure recovery by transmission of a random-access channel (RACH) 2 message when both a radio-link failure (RLF) timer and a time-to trigger (TTT) timer are concurrently running; and terminating the RLF timer in response to a RACH response message, wherein the RACH 2 message is a message transmitted on a random-access channel for radio-resource control (RRC) connection re-establishment. - View Dependent Claims (10, 11, 12, 13, 14, 15)
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16. A non-transitory computer-readable storage medium that stores instructions for execution by one or more processors to perform operations for fast handover failure recovery by User Equipment (UE), the operations to configure the or more processors to:
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initiate handover (HO) failure recovery by transmission of a random-access channel (RACH) 2 message when both a radio-link failure (RLF) timer and a time-to trigger (TTT) timer are concurrently running; and terminate the RLF timer in response to a RACH response message, wherein the RACH 2 message is a message transmitted on a random-access channel for radio-resource control (RRC) connection re-establishment. - View Dependent Claims (17, 18)
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Specification