Method and apparatus of reference signal dropping
The present invention provides a method for reference signal dropping and an apparatus for the method. A method for CSI-RS dropping comprises receiving first CSI-RS configuration information including sub-frame information which is transmission resource information of a first CSI-RS and through which the first CSI-RS information is transmitted and resource element information which contains the first CSI-RS; receiving second CSI-RS configuration information including sub-frame information which is transmission resource information of a second CSI-RS and through which the second CSI-RS is transmitted and resource element information which contains the second CSI-RS; and in case transmission resources of the first CSI-RS according to the first CSI-RS configuration and transmission resources of the second CSI-RS according to the second CSI-RS configuration overlap with each other, determining according to a priority order whether a CSI-RS received from the overlapping transmission resources corresponds to the first or the second CSI-RS.
1. A method for CSI-RS (Channel State Information Reference Signal) dropping, comprising:
receiving first CSI-RS configuration information including sub-frame information which is transmission resource information of a first CSI-RS and through which the first CSI-RS information is transmitted and resource element information which contains the first CSI-RS; receiving second CSI-RS configuration information including sub-frame information which is transmission resource information of a second CSI-RS and through which the second CSI-RS is transmitted and resource element information which contains the second CSI-RS; and
in case transmission resources of the first CSI-RS according to the first CSI-RS configuration and transmission resources of the second CSI-RS according to the second CSI-RS configuration overlap with each other, determining according to a priority order whether a CSI-RS received from the overlapping transmission resources corresponds to the first or the second CSI-RS.
2. The method of claim 1 , wherein, in case transmission resources of the first CSI-RS according to the first CSI-RS configuration and transmission resources of the second CSI-RS according to the second CSI-RS configuration overlap with each other, the determining according to a priority order whether a CSI-RS received from the overlapping transmission resources corresponds to the first or the second CSI-RS comprises:
calculating a period at which the first CSI-RS is received based on the first CSI-RS transmission resource information and calculating a period at which the second CSI-RS is received based on the second CSI-RS transmission resource information; and
determining based on the calculated period whether a CSI-RS received from the overlapping transmission resources corresponds to the first or the second CSI-RS.
3. The method of claim 2 , wherein the determining based on the calculated period whether a CSI-RS received from the overlapping transmission resources corresponds to the first or the second CSI-RS comprises:
determining a CSI-RS received from the overlapping transmission resources as the first CSI-RS in case the period of the first CSI-RS is longer than that of the second CSI-RS; and
determining a CSI-RS received from the overlapping transmission resources as the second CSI-RS in case the period of the second CSI-RS is longer than that of the first CSI-RS.
4. The method of claim 1 , wherein, in case transmission resources of the first CSI-RS according to configuration of the first CSI-RS and transmission resources of the second CSI-RS according to configuration of the second CSI-RS overlap with each other, determining according to a priority order whether a CSI-RS received from the overlapping transmission resources corresponds to the first or the second CSI-RS comprises:
deciding a use for which the first CSI-RS is received and utilized and a use for which the second CSI-RS is received and utilized; and
based on the use for which the first CSI-RS is received and utilized and the use for which the second CSI-RS is received and utilized, determining whether a CSI-RS received from the overlapping transmission resources corresponds to the first or the second CSI-RS.
5. The method of claim 1 , wherein, the determining according to a priority order whether a CSI-RS received from the overlapping transmission resources corresponds to the first or the second CSI-RS in case transmission resources of the first CSI-RS according to the first CSI-RS configuration and transmission resources of the second CSI-RS according to the second CSI-RS configuration overlap with each other comprises:
an upper layer's receiving information for determining whether a CSI-RS received from the overlapping transmission resources corresponds to the first or the second CSI-RS; and
based on information received by the upper layer, determining whether a received CSI-RS corresponds to the first or the second CSI-RS.
6. The method of claim 5 , wherein the information received by the upper layer is such information for determining whether a CSI-RS received from the overlapping transmission resources corresponds to the first or the second CSI-RS by the upper layer's deciding a CSI-RS between the first and the second CSI-RS needed for a network in the first place.
7. A user equipment, comprising:
a transceiver receiving first CSI-RS (Channel State Information Reference Signal) configuration information including sub-frame information which is transmission resource information of a first CSI-RS and through which the first CSI-RS information is transmitted and resource element information which contains the first CSI-RS and receiving second CSI-RS configuration information including sub-frame information which is transmission resource information of a second CSI-RS and through which the second CSI-RS is transmitted and resource element information which contains the second CSI-RS; and
a processor, in case transmission resources of the first CSI-RS according to the first CSI-RS configuration and transmission resources of the second CSI-RS according to the second CSI-RS configuration overlap with each other, determining according to a priority order whether a CSI-RS received from the overlapping transmission resources corresponds to the first or the second CSI-RS.
8. The user equipment of claim 6 , wherein the processor calculates a period at which the first CSI-RS is received based on the first CSI-RS transmission resource information and calculating a period at which the second CSI-RS is received based on the second CSI-RS transmission resource information; and
determines based on the calculated period whether a CSI-RS received from the overlapping transmission resources corresponds to the first or the second CSI-RS.
9. The user equipment of claim 7 , wherein the processor, in case period of the first CSI-RS is longer than that of the second CSI-RS, determines a CSI-RS received from the overlapping transmission resources as the first CSI-RS and in case period of the second CSI-RS is longer than that of the first CSI-RS, a CSI-RS received from the overlapping transmission resources as the second CSI-RS.
10. The user equipment of claim 6 , wherein the processor determines the use for which the first CSI-RS is received and utilized and the use for which the second CSI-RS is received and utilized; and based on the use for which the first CSI-RS is received and utilized and the use for which the second CSI-RS is received and utilized, determines whether a CSI-RS received from the overlapping transmission resources corresponds to the first or the second CSI-RS.
11. The user equipment of claim 6 , wherein the processor determines in a receiving upper layer whether a received CSI-RS corresponds to the first or the second CSI-RS based on information for determining whether a CSI-RS received from the overlapping transmission resources corresponds to the first or the second CSI-RS.
12. The method of claim 6 , wherein the information received by the upper layer is such information for determining whether a CSI-RS received from the overlapping transmission resources corresponds to the first or the second CSI-RS by the upper layer's deciding a CSI-RS between the first and the second CSI-RS needed for a network in the first place.