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US 9,866,284 B2Granted
Method, radio network controller, radio base station and user equipment for selecting downlink mode
AssigneeTelefonaktiebolaget LM Ericsson (publ)
InventorsMuhammad A. Kazmi, Jinhua Liu, Qingyu Miao
Life of this patent
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Abstract
It is presented a method for selecting downlink mode for a UE. The method is executed in a radio network controller, RNC, and comprises the steps of: estimating geometry for the UE; selecting a mode for the UE based on the estimated geometry, the mode being either a multi cell switching mode or a multi cell aggregation mode; and configuring the selected mode for the UE. By using the geometry of the UE for selecting mode, the most appropriate mode in terms of performance, such as capacity. Corresponding methods for an RBS, a UE, along with corresponding RNC, RBS and UE are also presented.
Claims25
A method of configuring a user equipment (UE) to a downlink mode, the method being executed in a radio network controller (RNC) and comprising:
- obtaining UE capability regarding multi-cell transmission modes;
- obtaining downlink load during a first duration;
- estimating geometry for the UE during a first duration, the geometry comprising a ratio of a power received on a first radio link to the sum of noise and powers received on other radio links;
- based on the UE capability and the estimated geometry and downlink load during the first duration, configuring the UE to one of a multi-cell switching mode, in which a total of only one of multiple cells having better channel conditions, relative to the others of the multiple cells, transmits data to the UE during a predetermined duration, and a multi-cell aggregation mode, in which each of multiple cells transmits different data to the UE during a predetermined duration;
- obtaining downlink load during a second duration;
- estimating geometry for the UE during a second duration;
- and
- based on the UE capability and the estimated geometry and downlink load during the second duration, configuring the UE to the other of the multi-cell switching mode and multi-cell aggregation mode.
5 more elements
A method of configuring a user equipment (UE) to a downlink mode, the method being executed in a radio base station (RBS) and comprising:
- obtaining UE capability regarding multi-cell transmission modes;
- obtaining downlink load during a first duration;
- estimating downlink quality for the UE during a first duration;
- based on the UE capability and the estimated downlink quality and downlink load during the first duration, configuring the UE to one of a multi-cell switching mode, in which a total of only one of multiple cells having better channel conditions, relative to the others of the multiple cells, transmits data to the UE during a predetermined duration, and a multi-cell aggregation mode, in which each of multiple cells transmits different data to the UE during a predetermined duration;
- obtaining downlink load during a second duration;
- estimating downlink quality for the UE during a second duration;
- and
- based on the UE capability and the estimated downlink quality and downlink load during the second duration, configuring the UE to the other of the multi-cell switching mode and multi-cell aggregation mode.
5 more elements
A method executed in a user equipment (UE) of suggesting a downlink mode, the method comprising:
- obtaining UE capability regarding multi-cell transmission modes;
- estimating performance for each of a default mode, a multi-cell switching mode in which a total of only one of multiple cells having better channel conditions, relative to the others of the multiple cells, transmits data to the UE during a predetermined duration, and a multi-cell aggregation mode in which each of multiple cells transmits different data to the UE during a predetermined duration;
- wherein in the default mode, a secondary High-Speed Downlink Shared Channel (HS-DSCH) serving cell is deactivated for the UE;
- selecting a mode being one of the default mode, the multi-cell switching mode, and the multi-cell aggregation mode which is supported by the UE and has highest estimated performance;
- and
- reporting the selected mode as a recommendation to a network serving the UE.
3 more elements
A radio network controller (RNC) operative to configure a user equipment (UE) to a downlink mode, the RNC comprising a processor configured to:
- obtaining UE capability regarding multi-cell transmission modes;
- obtaining downlink load during a first duration;
- estimate geometry for the UE during a first duration, the geometry comprising a ratio of a power received on a first radio link to the sum of noise and powers received on other radio links;
- based on the UE capability and the estimated geometry and downlink load during the first duration, configure the UE to one of a multi-cell switching mode, in which a total of only one of multiple cells better channel conditions, relative to the others of the multiple cells, transmits data to the UE during a predetermined duration, and a multi-cell aggregation mode, in which each of multiple cells transmits different data to the UE during a predetermined duration;
- obtain downlink load during a second duration;
- estimate geometry for the UE during a second duration;
- and
- based on the UE capability and the estimated geometry and downlink load during the second duration, configure the UE to the other of the multi-cell switching mode and multi-cell aggregation mode.
5 more elements
A radio base station (RBS) operative to configure a user equipment (UE) to a downlink mode, the RBS comprising a processor configured to:
- obtaining UE capability regarding multi-cell transmission modes;
- obtaining downlink load during a first duration;
- estimate downlink quality for the UE during a first duration;
- based on the estimated geometry during the first duration, configure the UE to one of a multi-cell switching mode, in which a total of only one of multiple cells better channel conditions, relative to the others of the multiple cells, transmits data to the UE during a predetermined duration, and a multi-cell aggregation mode, in which each of multiple cells transmits different data to the UE during a predetermined duration;
- obtain downlink load during a second duration;
- estimate downlink quality for the UE during a second duration;
- and
- based on the UE capability and the estimated downlink quality and downlink load during the second duration, configure the UE to the other of the multi-cell switching mode and multi-cell aggregation mode.
5 more elements
A user equipment (UE) operative to suggest a downlink mode, the UE comprising a processor configured to:
- obtain UE capability regarding multi-cell transmission modes;
- estimate performance for each of a default mode, a multi-cell switching mode in which a total of only one of multiple cells having better channel conditions, relative to the others of the multiple cells, transmits data to the UE during a predetermined duration, and a multi-cell aggregation mode in which each of multiple cells transmits different data to the UE during a predetermined duration;
- wherein in the default mode, a secondary High-Speed Downlink Shared Channel (HS-DSCH) serving cell is deactivated for the UE;
- select a mode being one of the default mode, the multi-cell switching mode, the multi-cell aggregation mode which is supported by the UE and has highest estimated performance;
- and
- report the selected mode as a recommendation to a network serving the UE.
3 more elements
A user equipment (UE) with a downlink mode configured by a radio network controller (RNC), wherein the RNC comprises a processor configured to:
- obtain UE capability regarding multi-cell transmission modes;
- obtain downlink load during a first duration;
- estimate geometry for the UE during a first duration, the geometry comprising a ratio of a power received on a first radio link to the sum of noise and powers received on other radio links;
- based on the estimated geometry during the first duration, configuring the UE to one of a multi-cell switching mode, in which a total of only one of multiple cells having better channel conditions, relative to the others of the multiple cells, transmits data to the UE during a predetermined duration, and a multi-cell aggregation mode, in which each of multiple cells transmits different data to the UE during a predetermined duration;
- obtain downlink load during a second duration;
- estimate geometry for the UE during a second duration;
- and
- based on the UE capability and the estimated geometry and downlink load during the second duration, configure UE to the other of the multi-cell switching mode and multi-cell aggregation mode.
5 more elements
Dependencies are inferred from the claim text.