Methods and apparatuses for processing scheduling of aperiodic information transmission
Embodiments of the present invention disclose triggering methods and apparatuses of aperiodic channel state information CSI and an aperiodic sounding reference signal SRS for a carrier aggregation system. The method comprises: (1) pre-assigning a corresponding relationship between bits of the CSI request field in an uplink grant and multiple downlink component carriers DL CCs of user equipment, wherein the number of bits of the CSI request field is greater than 1 and less than the maximum allowed number of DL CCs in the system; (2) determining the DL CC for which aperiodic CSI reporting is to be triggered; and (3) mapping the CSI request field in the uplink grant according to the pre-assigned corresponding relationship to mark the value of the bit corresponding to the determined DL CC as “trigger”.
1. A triggering method of aperiodic channel state information (CSI) for a carrier aggregation system, comprising:
via a processor, pre-assigning a mapping relationship between different values of a CSI request field in an uplink grant and CSI requests for different combinations of downlink component carriers (DL CCs), wherein a number of bits of the CSI request field is limited, being greater than 1 and less than a number of activated or configured DL CCs in the carrier aggregation system, wherein the number of activated or configured DL CCs corresponds to a maximum allowed number of DL CCs in the carrier aggregation system, and wherein the limited bits in the CSI request field have different combination values;
via the processor, determining the DL CC for which aperiodic CSI reporting is to be triggered; and
via the processor, populating a value of the CSI request field in the uplink grant according to the pre-assigned mapping relationship and the determined DL CC,
wherein mapping relationships between different combination values of the CSI request field and different DL CC combinations are preassigned by higher layer signaling,
wherein each combination value indicates one combination of DL CCs.
2. The method according to claim 1 , wherein the mapping relationship comprises: mapping a first value of the CSI request field to indicate that CSI reporting for the DL CC carrying the uplink grant is to be triggered.
3. The method according to claim 1 , wherein the mapping relationship comprises: mapping a second value of the CSI request field to indicate that CSI reporting for DL CCs is to be triggered.
4. The method according to claim 1 , wherein the mapping relationship comprises: mapping a third value of the CSI request field to indicate no CSI reporting for DL CCs is to be triggered.
5. The method according to claim 1 , further comprising:
when one uplink grant is not sufficient to trigger CSI reporting for DL CCs determined, sending multiple single-bit triggering uplink grants in the same subframe as the first uplink grant or in a subsequent subframe.
6. The method according to claim 1 , wherein an aperiodic CSI request field in an uplink grant has 2 bits.
7. A reporting method of aperiodic channel state information CSI for a carrier aggregation system, comprising:
via a processor, pre-assigning a mapping relationship between different values of a CSI request field in an uplink grant and CSI requests for different combinations of downlink component carriers (DL CCs), wherein a number of bits of the CSI request field is limited, being greater than 1 and less than a number of activated or configured DL CCs in the carrier aggregation system, wherein the number of activated or configured DL CCs corresponds to the maximum allowed number of DL CCs in the carrier aggregation system, and wherein the limited bits in the CSI request field have different combination values; and
via the processor, demapping, according to the pre-assigned mapping relationship, the CSI request field in the received uplink grant so as to determine the DL CC for which aperiodic CSI reporting is to be implemented,
wherein mapping relationships between different combination values of the CSI request field and different DL CC combinations are preassigned by higher layer signaling,
wherein each combination value indicates one combination of DL CCs.
8. The method according to claim 7 , wherein the mapping relationship comprises: mapping a first value of the CSI request field to indicate that CSI reporting for the DL CC carrying the uplink grant is to be triggered, and mapping a second value of the CSI request field to indicate that CSI reporting for DL CCs is to be triggered.
9. The method according to claim 7 , wherein the mapping relationship comprises: mapping a second value of the CSI request field to indicate that CSI reporting for DL CCs is to be triggered.
10. The method according to claim 7 , wherein the mapping relationship comprises: mapping a third value of the CSI request field to indicate no CSI reporting for any DL CCs is to be triggered.
11. A triggering apparatus of aperiodic channel state information CSI for a carrier aggregation system, comprising:
one or more processors configured to:
pre-assign a mapping relationship between different values of a CSI request field in an uplink grant and CSI requests for different combinations of downlink component carriers DL CCs, wherein a number of bits of the CSI request field is limited, being greater than 1 and less than a number of activated or configured DL CCs in the carrier aggregation system, wherein the number of activated or configured DL CCs corresponds to a maximum allowed number of DL CCs in the carrier aggregation system, and wherein the limited bits in the CSI request field have different combination values;
determine the DL CC for which aperiodic CSI reporting is to be triggered; and
populate a value of the CSI request field in the uplink grant according to the pre-assigned mapping relationship and the determined DL CC,
wherein mapping relationships between different combination values of the CSI request field and different DL CC combinations are preassigned by higher layer signaling,
wherein each combination value indicates one combination of DL CCs.
12. The apparatus according to claim 11 , wherein the mapping relationship comprises: mapping a first value of the CSI request field to indicate that CSI reporting for the DL CC carrying the uplink grant is to be triggered.
13. The apparatus according to claim 11 , wherein the mapping relationship comprises: mapping a third value of the CSI request field to indicate no CSI reporting for DL CCs is to be triggered.
14. A reporting apparatus of aperiodic channel state information CSI for a carrier aggregation system, comprising:
one or more processors configured to:
pre-assign a mapping relationship between different values of a CSI request field in an uplink grant and CSI requests for different combinations of downlink component carriers DL CCs, wherein a number of bits of the CSI request field is limited, being greater than 1 and less than a number of activated or configured DL CCs in the carrier aggregation system, wherein the number of activated or configured DL CCs corresponds to a maximum allowed number of DL CCs in the carrier aggregation system, and wherein the limited bits in the CSI request field have different combination values; and
demap, according to the pre-assigned mapping relationship, the CSI request field in the received uplink grant so as to determine the DL CC for which aperiodic CSI reporting is to be implemented,
wherein mapping relationships between different combination values of the CSI request field and different DL CC combinations are preassigned by higher layer signaling,
wherein each combination value indicates one combination of DL CCs.
15. The apparatus according to claim 14 , wherein the mapping relationship comprises: mapping a first value of the CSI request field to indicate that CSI reporting for the DL CC carrying the uplink grant is to be triggered.
16. The apparatus according to claim 14 , wherein the mapping relationship comprises: mapping a third value of the CSI request field to indicate no CSI reporting for DL CCs is to be triggered.