Radio-link establishment for multi-state cells

摘要

A radio link is established for multi-state cells. User equipment is operated in a connected mode with a serving cell. A transition is determined of a neighbor cell from dormant to active. At least a set number of out-of-synchronization events are detected with respect to the serving cell. It is determined that the neighbor-cell reference-signal received power is greater than the serving-cell reference-signal received power plus a threshold after determining the transition of the neighbor cell from dormant to active. A radio-resource-control connection-establishment message is sent to the neighbor cell when the neighbor-cell reference-signal received power is greater than the serving-cell reference-signal received power plus a threshold.

主权项

1. A method in user equipment, the method comprising:
operating the user equipment in a connected mode with a serving cell; determining a transition of a neighbor cell from dormant to active; detecting at least a set number of out-of-synchronization events with respect to the serving cell; determining that the neighbor-cell reference-signal received power is greater than the serving-cell reference-signal received power plus a threshold after determining the transition of the neighbor cell from dormant to active; and sending a radio-resource-control connection-establishment message to the neighbor cell when the neighbor-cell reference-signal received power is greater than the serving-cell reference-signal received power plus a threshold, when at least the set number of out-of-synchronization events has occurred with respect to the serving cell, and when the neighbor cell has transitioned from dormant to active,further comprising:
starting a T310 timer in response to detecting at least the set number of out-of-synchronization events, where the T310 timer indicates a time for the user equipment to synchronize with the serving cell; wherein sending a radio-resource-control connection-establishment message includes sending the radio-resource-control connection-establishment message to the neighbor cell prior to expiration of the T310 timer, further comprising suspending the T310 timer when the neighbor-cell reference-signal received power is greater than the serving-cell reference-signal received power plus a threshold,further comprising:
receiving a signal indicating the radio-resource-control connection was rejected; and restarting the T310 timer if the radio-resource-control connection was rejected.