Sub-band selection for carrier aggregation
In systems and methods of selecting a sub-band, a first sub-band and a second sub-band of an access node are selected, and is it determined that an intermodulation product of the first sub-band and the second sub-band overlaps with a carrier band of the access node. A transmission of data is scheduled on the second sub-band when a power of the intermodulation product of the first sub-band and the second sub-band does not meet a power threshold.
1. A method of selecting a sub-band, comprising:
selecting a first sub-band and a plurality of second sub-bands from among candidate sub-bands of an access node, the first sub-band and the plurality of second sub-bands being selected in a first sector of the access node from a same carrier band;
calculating intermodulation products of the first sub-band and each of the selected second sub-bands;
removing at least one of the selected second sub-bands from the candidate sub-bands when the intermodulation product of the first sub-band and the selected second sub-bands overlap with at least a portion of the carrier band of the access node and a power of the intermodulation product meets a power threshold;
scheduling and transmitting a first transmission of data on the removed second sub-band in a second sector of the access node when the power of the intermodulation product of the first sub-band and the selected second sub-bands does not meet the power threshold.
2. The method of claim 1 , wherein scheduling the first transmission of data further comprises:
scheduling and transmitting a transmission of data on the first sub-band and the second sub-band when the power of the intermodulation product of the first sub-band and the second sub-band does not meet the power threshold.
3. The method of claim 1 , wherein
a transmission of data is further scheduled and transmitted on the second sub-band in the first sector of the access node when the intermodulation distortion does not meet the power threshold.
4. The method of claim 3 , wherein scheduling the further transmission of data further comprises:
preventing the transmission of data on the second sub-band in the first sector of the access node when the intermodulation distortion meets the power threshold; and
scheduling and transmitting the transmission of data on the second sub-band in the second sector of the access node.
5. The method of claim 1 , further comprising:
selecting a third sub-band carrier of a second carrier band;
determining that an intermodulation product of the first sub-band and the third sub-band is within a carrier band of the access node; and
preventing a transmission of data on the third sub-band when the power of the intermodulation product meets the power threshold.
6. The method of claim 5 , further comprising:
preventing transmission of data in the first sector of the access node on the third sub-band from when the power of the intermodulation product meets the power threshold.
7. The method of claim 5 , further comprising:
scheduling and transmitting the transmission of data in the second sector of the access node on the third sub-band when the power of the intermodulation product meets the power threshold.
8. A system for selecting a sub-band, comprising:
a processing node comprising a processor and a transmitter, configured to:
select a first sub-band and a plurality of second sub-bands from among candidate sub-bands of an access node, the first sub-band and the plurality of second sub-bands being selected in a first sector of the access node from a same carrier band;
calculate intermodulation products of the first sub-band and each of the selected second sub-bands;
remove at least one of the selected second sub-bands from the candidate sub-bands when the intermodulation product of the first sub-band and the selected second sub-bands overlap with at least a portion of the carrier band of the access node and a power of the intermodulation product meets a power threshold;
schedule and transmit a first transmission of data on the removed second sub-band in a second sector of the access node when the power of the intermodulation product of the first sub-band and the selected second sub-bands does not meet the power threshold.
9. The system of claim 8 , wherein the processing node is further configured to:
schedule and transmit a transmission of data on the first sub-band and the second sub-band when the power of the intermodulation product of the first sub-band and the second sub-band does not meet the power threshold.
10. The system of claim 8 , wherein the processing node is further configured to:
schedule and transmit a further transmission of data on the second sub-band in the first sector of the access node when the intermodulation distortion does not meet the power threshold.
11. The system of claim 10 , wherein the processing node is further configured to:
prevent the further transmission of data on the second sub-band in the first sector of the access node when the intermodulation distortion meets the power threshold; and
schedule and transmit the further transmission of data on the second sub-band in the second sector of the access node.
12. The system of claim 8 , wherein the processing node is further configured to:
select a third sub-band carrier of a second carrier band;
determine that an intermodulation product of the first sub-band and the third sub-band is within a carrier band of the access node; and
prevent a transmission of data on the third sub-band when the power of the intermodulation product meets the power threshold.
13. The system of claim 12 , wherein the processing node is further configured to:
prevent the further transmission of data in the first sector of the access node on the third sub-band from when the power of the intermodulation product meets the power threshold; and
schedule and transmit the further transmission of data in the second sector of the access node on the third sub-band from when the power of the intermodulation product meets the power threshold.
14. A method of selecting a sub-band, comprising:
selecting a first sub-band and a second sub-band from among a plurality of candidate sub-bands in a first sector of an access node, wherein the first sub-band is a sub-band of a first carrier band and the second sub-band is a sub-band of a second carrier band;
calculating intermodulation products of the selected first sub-band and the selected second sub-band;
scheduling and transmitting a first transmission of data on the unselected candidate sub-bands in the first sector of the access node;
determining that an intermodulation product of the first sub-band and the second sub-band overlaps at least a portion of either the first or second carrier band of the access node and, based on the determination that a power of the intermodulation product meets a power threshold, removing the selected second sub-band; and
scheduling and transmitting a second transmission of data on the removed second sub-band in a second sector of the access node when the power of the intermodulation product of the first sub-band and the selected second sub-band does not meet the power threshold.
15. The method of claim 14 , wherein scheduling the second transmission of data further comprises:
scheduling and transmitting a transmission of data on the first sub-band and the second sub-band when the power of the intermodulation product of the first sub-band and the second sub-band does not meet the power threshold.