Selection of a radio cell sector
AssigneeTelefonaktiebolaget L M Ericsson (publ)
InventorsMarco BELLESCHI, Hongwei WANG, Christian SKÄRBY
Life of this patent
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Abstract
The present disclosure concerns radio communication. In one of its aspects, the technology presented herein concerns a method for selecting the most suitable secondary carrier for carrier aggregation when employing a combined radio cell including multiple radio sectors A—1, A—2, A—3 of a first Cell (Cell A) and multiple radio sectors B_x, B_y, B_z of a second cell (Cell B).
Claims11
A method performed by a base station for selecting a secondary carrier sector of a second radio cell to be used by a user equipment when employing carrier aggregation, wherein the base station is serving a first radio cell as well as a second radio cell, which second radio cell is at least partially overlapping the first radio cell, and wherein the base station is controlling multiple radio units each of which is serving a respective primary carrier sector of the first radio cell and wherein the base station is also controlling multiple radio units each of which is serving a respective secondary carrier sector of the second radio cell, the method comprising:
- collecting information related to powers of all primary carrier sectors;
- based thereon comparing the powers of all primary carrier sectors and determining which one of the primary carrier sectors has the highest power and which one of the primary carrier sectors has the next highest power;
- comparing the highest power with a first threshold value;
- comparing a difference between the highest power and the next highest power with a second threshold value;
- responsive to the highest power being above the first threshold as well as the difference between the highest power and the next highest power being above the second threshold value ordering at least one selected user equipment to perform a Inter-Frequency Handover from a primary carrier to a secondary carrier;
- in response thereto
- collecting information related to powers of all secondary carrier sectors of the second radio cell;
- based thereon comparing the powers of all secondary carrier sectors and determining which one of the secondary carrier sectors has the highest power;
- and
- selecting the secondary carrier sector with the highest power to become the secondary carrier sector to be used.
A base station for selecting a secondary carrier sector of a second radio cell to be used by a user equipment when employing carrier aggregation, wherein the base station is configured to serve a first radio cell as well as a second radio cell, which second radio cell is at least partially overlapping the first radio cell, and wherein the base station is configured to control multiple radio units each of which is configured to serve a respective primary carrier sector of the first radio cell and wherein the base station is also configured to control multiple radio units each of which is configured to serve a respective secondary carrier sector of the second radio cell, the base station comprising:
- a communication interface for wireless communication with the multiple radio units and for communication with at least one user equipment;
- a processor;
- and
- a memory storing computer program code which, when run in the processor, causes the base station to:
- collect information related to powers of all primary carrier sectors;
- based thereon compare the powers of all primary carrier sectors and determining which one of the primary carrier sectors has the highest power and which one of the primary carrier sectors has the next highest power;
- compare the highest power with a first threshold value;
- compare a difference between the highest power and the next highest power with a second threshold value;
- responsive to the highest power being above the first threshold as well as the difference between the highest power and the next highest power being above the second threshold value order one or more selected user equipments to perform a Inter-Frequency Handover from a primary carrier to a secondary carrier;
- in response thereto collect information related to powers of all secondary carrier sectors of the second radio cell;
- based thereon compare the powers of all secondary carrier sectors and determining which one of the secondary carrier sectors has the highest power;
- and select the secondary carrier sector with the highest power to become the secondary carrier sector to be used.
Dependencies are inferred from the claim text.