TRANSMISSION RANK SELECTION WHEN DEPLOYING A SHARED RADIO CELL
First Claim
1. A method performed by a base station for selecting a transmission rank, wherein the base station is serving a first radio cell and is operating in a shared radio cell environment where a single physical-layer cell identity (abbreviated PCI) is shared among the base station and radio units serving other radio cells, and wherein the base station and the radio units are transmission points serving one or several user equipments in respective radio cells utilizing said single PCI, the method comprising:
- receiving a channel-state report from a user equipment;
estimating a channel quality parameter, which reflects a relation (Δ
) between estimated receive power on a data channel allocated to the user equipment and estimated receive power on a control channel allocated to the user equipment; and
selecting the transmission rank on the basis of the received channel-state report as well as the estimated channel quality parameter.
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Accused Products
Abstract
The present disclosure concerns radio communication. In one of its aspects, the technology presented herein concerns a method performed by a base station 210 for selecting a transmission rank. The method may advantageously be carried out when the base station 210 is operating in a shared cell 200. The base station receives a channel-state report from a user equipment. Also, a channel quality parameter is estimated by the base station 210. Furthermore, the base station 210 selects the transmission rank (e.g. transmission rank 1 or transmission rank 2) on the basis of the received channel-state report as well as the estimated channel quality parameter.
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Citations
12 Claims
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1. A method performed by a base station for selecting a transmission rank, wherein the base station is serving a first radio cell and is operating in a shared radio cell environment where a single physical-layer cell identity (abbreviated PCI) is shared among the base station and radio units serving other radio cells, and wherein the base station and the radio units are transmission points serving one or several user equipments in respective radio cells utilizing said single PCI, the method comprising:
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receiving a channel-state report from a user equipment; estimating a channel quality parameter, which reflects a relation (Δ
) between estimated receive power on a data channel allocated to the user equipment and estimated receive power on a control channel allocated to the user equipment; andselecting the transmission rank on the basis of the received channel-state report as well as the estimated channel quality parameter. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9)
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10. A base station for selecting a transmission rank, wherein the base station is configured to serve a first radio cell and is configured to operate in a shared radio cell environment where a single physical-layer cell identity (PCI) is shared among the base station and radio units configured to serve other radio cells, and wherein the base station and the radio units are transmission points configured to serve one or several user equipments in respective radio cells utilizing said single PCI, the base station comprising:
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a receiver configured to receive a channel-state report from a user equipment; a processor; and a memory storing computer program code which, when run in the processor causes the base station to estimate a channel quality parameter which reflects a relation between estimated receive power on a data channel allocated to the user equipment and estimated receive power on a control channel allocated to the user equipment, and to select the transmission rank on the basis of the received channel-state report as well as the estimated channel quality parameter. - View Dependent Claims (11, 12)
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Specification