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US 10,455,591 B2Granted
Apparatuses, methods, computer programs, and computer program products for interference avoidance
AssigneeTelefonaktiebolaget LM Ericsson (publ)
InventorsTorbjörn Wigren, Mats Åhlander
Life of this patent
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Abstract
A scheduling function node (SF) uses the beams available for each WCD to avoid scheduling a transmission that would imply that interference between WCDs is created. In the simplest form such a scheme could be described as follows: (1) avoid scheduling transmission in directions that coincide between WCDs (here, a direction would typically be represented by both azimuth and elevation angles) and (2) when the available beam directions do not allow interference avoidance, accounting for this fact and exploiting other types of orthogonality in the scheduling of time-frequency resources.
Claims20
A method for interference avoidance, comprising:
- a network node obtaining first candidate beam information identifying a first set of one or more candidate beams for a first wireless communication device, WCD, being served by the network node, the first set of candidate beams for the first WCD comprising a first candidate beam having a first direction;
- the network node obtaining second candidate beam information identifying a second set of one or more candidate beams for a second WCD being served by the network node, the second set of candidate beams for the second WCD comprising a second candidate beam having a second direction;
- and
- the network node, using the first and second candidate beam information, scheduling i) the transmission of first data to the first WCD and the transmission of second data to the second WCD, wherein
- the scheduling of the transmissions comprises:
- selecting a transmission resource for use in transmitting the first data to the first WCD, selecting a transmission resource for use in transmitting the second data to the second WCD,
- selecting the transmission resource for use in transmitting the first data to the first WCD further comprises selecting a candidate beam from the first set of candidate beams for the first WCD, and
- selecting the transmission resource for use in transmitting the second data to the second WCD further comprises selecting a candidate beam from the second set of candidate beams for the second WCD,
- selecting a candidate beam from the first set of candidate beams for the first WCD comprises selecting a candidate beam from a first subset of candidate beams, wherein each candidate beam included in the first subset of candidate beams is a) included in the first set of candidate beams and b) not included in the second set of candidate beams, and
- selecting a candidate beam from the second set of candidate beams for the second WCD comprises selecting a candidate beam from a second subset of candidate beams, wherein each candidate beam included in the second subset of candidate beams is a) included in the second set of candidate beams and b) not included in the first set of candidate beams.
7 more elements
A network node for interference avoidance, the network node comprising:
- a computer readable medium;
- and
- a data processing apparatus, comprising one or more processors, coupled to the computer readable medium, wherein the data processing apparatus is configured to:
- obtain first candidate beam information identifying a first set of one or more candidate beams for a first wireless communication device, WCD, being served by the network node, the first set of candidate beams for the first WCD comprising a first candidate beam having a first direction;
- obtain second candidate beam information identifying a second set of one or more candidate beams for a second WCD being served by the network node, the second set of candidate beams for the second WCD comprising a second candidate beam having a second direction;
- and
- schedule i) the transmission of first data to the first WCD and ii) the transmission of second data to the second WCD, wherein
- the data processing system is configured to perform the scheduling of the transmissions using the first and second candidate beam information,
- the scheduling of the transmissions comprises:
- selecting a transmission resource for use in transmitting the first data to the first WCD, selecting a transmission resource for use in transmitting the second data to the second WCD, and determining whether the first direction is different than the second direction,
- selecting the transmission resource for use in transmitting the first data to the first WCD further comprises selecting a candidate beam from the first set of candidate beams for the first WCD
- selecting the transmission resource for use in transmitting the second data to the second WCD further comprises selecting a candidate beam from the second set of candidate beams for the second WCD,
- the network node is configured to select a candidate beam from the first set of candidate beams for the first WCD by:
- 1) determining a first subset of candidate beams for the first WCD, wherein each candidate beam included in the first subset of candidate beams is a) included in the first set of candidate beams and b) not included in the second set of candidate beams;
- and 2) selecting a candidate beam from the first subset of candidate beams, and
- the network node is configured to select a candidate beam from the second set of candidate beams for the second WCD by:
- 1) determining a second subset of candidate beams for the second WCD, wherein each candidate beam included in the second subset of candidate beams is a) included in the second set of candidate beams and b) not included in the first set of candidate beams;
- and 2) selecting a candidate beam from the second subset of candidate beams.
15 more elements
Dependencies are inferred from the claim text.