Method and apparatus for cell switching
AssigneeLG Electronics Inc.
InventorsYunjung Yi, Byounghoon Kim, Joonkui Ahn, Dongyoun Seo
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Abstract
Disclosed are a method and an apparatus for transmitting data. A cell switching method can comprise the steps of: allowing a primary (P)-cell base station to enable a first secondary(S)-cell; allowing the P-cell base station to receive channel state information from a second S-cell; allowing the P-cell base station to determine the second S-cell as a switching S-cell on the basis of the channel state information; allowing the P-cell base station to disable the first S-cell and enable the second S-cell.
Claims10
A method for cell switching, comprising:
- activating, by a base station of a primary (P)-cell, a first secondary (S)-cell;
- receiving, by the base station of the P-cell, channel state information from a second S-cell;
- determining, by the base station of the P-cell, the second S-cell as a switching S-cell based on the channel state information;
- and
- deactivating the first S-cell and activating the second S-cell by the base station of the P-cell,
- wherein the first S-cell and the second S-cell are included in an S-cell group,
- wherein the S-cell group is a set of a plurality of S-cells for which an identical physical cell identifier is configured and operated based on an identical center frequency,
- wherein the channel state information includes information of a channel which is obtained by overhearing uplink data that a wireless device transmits to the first S-cell by the second S-cell,
- wherein the P-cell, the first S-cell and the second S-cell are aggregated by a carrier aggregation, and
- wherein the first S-cell and the second S-cell are activated by the P-cell.
A base station of a primary (P)-cell that performs cell switching in a wireless communication system, the base station comprising a process and a radio frequency (RF) unit,
- wherein the processor is configured to:
- activate a first secondary (S)-cell,
- receive channel state information from a second S-cell,
- determine the second S-cell as a switching S-cell based on the channel state information, and
- deactivate the first S-cell and activate the second S-cell,
- wherein the RF unit configured to receive the channel state information from the second S-cell,
- wherein the first S-cell and the second S-cell are included in an S-cell group,
- wherein the S-cell group is a set of a plurality of S-cells for which an identical physical cell identifier is configured and operated based on an identical center frequency,
- wherein the channel state information includes information of a channel which is obtained by overhearing uplink data that a wireless device transmits to the first S-cell by the second S-cell,
- wherein the P-cell, the first S-cell and the second S-cell are aggregated by a carrier aggregation, and
- wherein the first S-cell and the second S-cell are cells activated by the P-cell.
Dependencies are inferred from the claim text.