Method, device and computer program for primary cell change
AssigneeTelefonaktiebolaget LM Ericsson (publ)
InventorsRui Fan, Mårten Ericson, Caner Kilinc
Life of this patent
Estimating the term…
Abstract
Embodiments of the disclosure generally relate to primary cell change. A network device detects whether layer 2 context being kept and/or one or more serving secondary cells remain for a primary cell change for a terminal device. Then, the network device configures a message indicating the primary cell change based on the detecting and transmits the message to the terminal device. The time period of primary cell change can be reduced efficiently and the data transmission during the primary cell change can be optimized.
Claims16
A method implemented at a terminal device, comprising:
- receiving, by the terminal device, a message transmitted from a network device;
- obtaining, by the terminal device, information of a primary cell change from the received message, wherein the obtained information of the primary cell change indicates whether a second layer 2 context which includes packet data convergence protocol (PDCP) parameters corresponding to a second primary cell has not been changed or has been changed by comparing with a first layer 2 context of a first primary cell;
- and
- performing the primary cell change based on the obtained information from the first primary cell to the second primary cell.
A terminal device, comprising:
- a non-transitory machine-readable storage medium to store instructions;
- and
- a data processor coupled with the non-transitory machine-readable storage medium to process the stored instructions, causing the terminal device to perform:
- receiving a message transmitted from a network device;
- obtain information of a primary cell change from the received message, wherein the obtained information of the primary cell change indicates whether a second layer 2 context which includes packet data convergence protocol (PDCP) parameters corresponding to a second primary cell has not been changed or has been changed by comparing with a first layer 2 context of a first primary cell;
- and
- perform the primary cell change based on the obtained information from the first primary cell to the second primary cell.
A network device, comprising:
- a non-transitory machine-readable storage medium to store instructions;
- and
- a data processor coupled with the non-transitory machine-readable storage medium to process the stored instructions, causing the network device to perform:
- detecting, for a primary cell change from a first primary cell to a second primary cell for a terminal device, whether a second layer 2 context which includes packet data convergence protocol (PDCP) parameters corresponding to the second primary cell has not been changed or has been changed by comparing with a first layer 2 context of the first primary cell;
- configuring a message indicating the primary cell change based on the detecting;
- and
- transmitting the message to the terminal device.
A method implemented at a network device, comprising:
- detecting, by the network device, for a primary cell change from a first primary cell to a second primary cell for a terminal device, whether a second layer 2 context which includes packet data convergence protocol (PDCP) parameters corresponding to the second primary cell has not been changed or has been changed by comparing with a first layer 2 context of the first primary cell;
- configuring a message indicating the primary cell change based on the detecting;
- and
- transmitting the message to the terminal device.
Dependencies are inferred from the claim text.