Controlling random access failure on a secondary cell
AssigneeTelefonaktiebolaget LM Ericsson (publ)
InventorsLisa Boström, Magnus Stattin, Tobias Tynderfeldt
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Abstract
A method in a base station for controlling a Random Access, RA, procedure is provided. The base station initiates (201) an RA procedure on a Secondary Cell, SCell, in a User Equipment, UE, by sending to the UE a Physical Downlink Control Channel, PDCCH, order for a RA procedure on the SCell. At initiation of RA, the base station starts (202) a timer in the base station. The timer is a timer for random access failure detection associated with said initiated RA procedure. If the RA procedure has not been completed before expiry of said timer, the base station sends (205) a command to the UE, commanding the UE to deactivate the SCell, and thereby stopping the RA procedure on the SCell.
Claims28
A method in a base station for controlling a Random Access, RA, procedure comprising:
- initiating the RA procedure on a Secondary Cell, SCell, in a Terminal Device, TD, by sending to the TD an order for a RA procedure on the SCell,
- at initiation of RA, starting a timer in the base station, wherein said timer is a timer for random access failure detection associated with said initiated RA procedure,
- if the RA procedure has not been completed before expiry of said timer, sending a command to the TD, commanding the TD to deactivate the SCell, and thereby stopping the RA procedure on the SCell.
A method in a Terminal Device, TD, for controlling a Random Access, RA, procedure, which TD is operable to perform RA procedure in both a Primary cell, PCell, and in at least one Secondary Cell, SCell, the method comprising:
- receiving from a base station, an order for the RA procedure on an SCell in the TD,
- starting the RA procedure on the SCell according to the order,
- receiving a command from the base station, which commands the TD to deactivate the SCell and thereby stop the RA procedure on the SCell, and
- stopping the RA procedure on the SCell by and deactivating the SCell according to the command.
A base station for controlling a Random Access, RA, procedure comprising:
- the base station comprising a processing circuitry configured to initiate the RA procedure on a Secondary Cell, SCell, in a Terminal Device, TD, by sending to the TD an order for a RA procedure on the SCell,
- which processing circuitry further is configured to, at initiation of the RA, start a timer in the base station, wherein said timer is a timer for random access failure detection associated with said initiated RA procedure, and
- which processing circuitry further is configured to, if the RA procedure has not been completed before expiry of said timer, send a command to the TD, commanding the TD to deactivate the SCell, and thereby stopping the RA procedure on the SCell.
A Terminal Device, TD, for controlling a Random Access, RA, procedure, which TD is operable to perform RA procedure in both a Primary cell, PCell, and in at least one Secondary Cell, SCell,
- the TD comprising a processing circuitry configured to receive from a base station, an order for the RA procedure on an SCell in the TD,
- which processing circuitry further is configured to start the RA procedure on the SCell according to the order,
- which processing circuitry further is configured to receive a command from the base station, which commands the TD to deactivate the SCell and thereby stop the RA procedure on the SCell, and
- which processing circuitry further is configured to stop the RA procedure on the SCell by and deactivating the SCell according to the command.
Dependencies are inferred from the claim text.