Base transceiver station and associated method for communication between base transceiver station and user equipments
First Claim
1. Base transceiver station (BTS) for communicating with a plurality of user equipments divided in at least two groups, said base station comprising:
- an antenna element arrangement generating at least two shifted static beams with respective down tilts for reaching the user equipments and comprising;
a plurality of antenna elements respectively connected to transceiver processing chains for exchanging communication signals between the BTS and the user equipments;
a processing unit connected to said transceiver chains and configured to perform at least two linear complex combinations of digital signals between said antenna elements and the base transceiver station for the same spectrum resources, and processing beam flows respectively associated to said generated beams, with up-link signals received from user equipments; and
wherein the processing unit is configured to receive up-link signals and configured to select per user equipment an appropriate beam based on the quality of said up-link signals in the beam flows;
wherein the processing unit, for each beam flow;
compares a carrier to interference ratio (C/I) between up-link signals received per beam for the same spectrum resources with a predetermined threshold;
selects the beam with the highest power level at the user equipment location and assigns the user equipment to the selected beam when the C/I meets or exceeds the threshold; and
combines the beam flows using a maximum ratio combining (MRC) when the C/I does not meet or exceed the threshold.
11 Assignments
0 Petitions
Accused Products
Abstract
The invention relates to a base transceiver station (BTS) for communicating with a plurality of user equipments (UE1, UE2, UE3, UE4, UE5) divided in at least two groups, said base station comprises: an antenna element arrangement generating at least two shifted static beams (Bi, Bo) with respective down tilts for reaching the user equipments (UE1, UE2, UE3, UE4, UE5) a processing unit (25) connected to said transceiver chains (9) and having means for performing at least two linear complex combinations of up-link digital signals—means for receiving said up-link signals and for selecting per user equipment the appropriate beam based on the quality of said up-link signals in the beam flows (Fi,FO).
14 Citations
11 Claims
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1. Base transceiver station (BTS) for communicating with a plurality of user equipments divided in at least two groups, said base station comprising:
an antenna element arrangement generating at least two shifted static beams with respective down tilts for reaching the user equipments and comprising; a plurality of antenna elements respectively connected to transceiver processing chains for exchanging communication signals between the BTS and the user equipments; a processing unit connected to said transceiver chains and configured to perform at least two linear complex combinations of digital signals between said antenna elements and the base transceiver station for the same spectrum resources, and processing beam flows respectively associated to said generated beams, with up-link signals received from user equipments; and
wherein the processing unit is configured to receive up-link signals and configured to select per user equipment an appropriate beam based on the quality of said up-link signals in the beam flows;wherein the processing unit, for each beam flow; compares a carrier to interference ratio (C/I) between up-link signals received per beam for the same spectrum resources with a predetermined threshold; selects the beam with the highest power level at the user equipment location and assigns the user equipment to the selected beam when the C/I meets or exceeds the threshold; and combines the beam flows using a maximum ratio combining (MRC) when the C/I does not meet or exceed the threshold. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8)
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9. A method for communication between a base transceiver station (BTS) and a plurality of user equipments divided in at least two groups, wherein said base station comprising:
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an antenna element arrangement generating at least two shifted static beams with respective down tilts for reaching the user equipments and comprising; a plurality of antenna elements respectively connected to transceiver processing changes for exchanging communication signals between the BTS and the user equipments; a processing unit connected to said transceiver chains and configured to perform at least two linear complex combinations of digital signals between said antenna elements and the base transceiver station for the same spectrum resources, said method comprising; processing beam flows respectively associated to said generated beams with up-link signals received from user equipments; receiving said up-link signals; selecting per user equipment the appropriate beam based on the quality of said up-link signals in the beam flows; and comparing, for each beam flow per user, a carrier to interference ratio (C/I) between up-link signals received per beam for the same spectrum resources with a predetermined threshold;
whereinselecting and assigning the beam with the highest power level at the user equipment location to said user equipment when the C/I meets or exceeds the threshold; and combining the beam flows using a maximum ratio combining (MRC) when the C/I does not meet or exceed the threshold. - View Dependent Claims (10, 11)
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Specification