Systems and methods for adaptation in a wireless network
An embodiment method of network node operation includes indicating, by a first network node, to a first UE, a first number of REs in a first set of RBs for a first reference signal, transmitting, by the first network node, to the first UE, the first reference signal in accordance with the first number of REs and a first precoding in a first subframe, receiving, by the first network node, from the first UE, a report indicating a first MCS in accordance with a level of signal and interference measured by the first UE, wherein the measurement is restricted to the first reference signal, and transmitting, by the first network node, a first data with the indicated first MCS and the first precoding in a second subframe, the first data being transmitted on a second number of REs in the first set of RBs in the second subframe.
1. A method for wireless communications, the method comprising:
receiving, by a user equipment (UE), reference signals on a first subset of a set of non-zero-power (NZP) CSI reference signal (CSI-RS) (NZP CSI-RS) resources; and
transmitting, by the UE, a channel state information (CSI) report to a network device, the CSI report including a channel quality indicator (CQI) associated with the first subset of NZP CSI-RS resources and a rank indicator (RI) associated with the first subset of NZP CSI-RS resources, the CQI based on a channel measurement on the first subset of NZP CSI-RS resources and an interference measurement on the first subset of the set of NZP CSI-RS resources and a set of resources configured for interference measurements for CSI report(s) associated with a CSI report configuration.
2. The method of claim 1 , wherein the CSI report excludes a precoding matrix indicator (PMI).
3. The method of claim 1 , wherein the set of resources configured for interference measurement include at least a set of CSI interference measurement (CSI-IM) resources.
4. The method of claim 1 , further comprising receiving, by the UE, a configuration of measurement restriction associated with the channel measurement.
5. The method of claim 1 , further comprising receiving a configuration of measurement restriction associated with the interference measurement.
6. The method of claim 1 , further comprising receiving, by the UE, a downlink control information (DCI) message indicating the first subset of NZP CSI-RS resources and the set of resources configured for interference measurements for CSI report(s) associated with the CSI report configuration.
7. The method of claim 1 , wherein the RI indicates a rank for a number of layers/ports associated with the first subset of NZP CSI-RS resources.
8. The method of claim 1 , wherein the RI indicates a rank equal to a number of selected layers/ports within the first subset of NZP CSI-RS resources.
9. The method of claim 1 , wherein the CSI report is associated with a designation of an amount of bundling of resource blocks (RBs) to be used by the network device to transmit a first reference signal (RS) on the first subset of NZP CSI-RS resources.
10. The method of claim 1 , wherein a signaling for the interference measurement includes at least one of a sequence and layers/ports for interference measurement by the UE.
11. The method of claim 1 , wherein the set of resources configured for interference measurements for the CSI report include different resources than the first subset of NZP CSI-RS resources.
12. A user equipment (UE) comprising:
a processor; and
a non-transitory computer readable storage medium storing programming for execution by the processor, the programming including instructions to:
receive reference signals on a first subset of a set of non-zero-power (NZP) CSI reference signal (CSI-RS) (NZP CSI-RS) resources; and
transmit a channel state information (CSI) report to a network device, the CSI report including a channel quality indicator (CQI) associated with the first subset of NZP CSI-RS resources and a rank indicator (RI) associated with the first subset of NZP CSI-RS resources, the CQI based on a channel measurement on the first subset of NZP CSI-RS resources and an interference measurement on the first subset of NZP CSI-RS resources and a set of resources configured for interference measurements for CSI report(s) associated with a CSI report configuration.
13. The UE of claim 12 , wherein the CSI report excludes a precoding matrix indicator (PMI).
14. The UE of claim 12 , wherein the set of resources configured for interference measurement include at least a set of CSI interference measurement (CSI-IM) resources.
15. The UE of claim 12 , further comprising receiving, by the UE, a configuration of measurement restriction associated with the channel measurement.
16. The UE of claim 12 , further comprising receiving a configuration of measurement restriction associated with the interference measurement.
17. The UE of claim 12 , further comprising receiving, by the UE, a downlink control information (DCI) message indicating the first subset of NZP CSI-RS resources and the set of resources configured for interference measurements for CSI report(s) associated with a CSI report configuration.
18. The UE of claim 12 , wherein the RI indicates a rank for a number of layers/ports associated with the first subset of NZP CSI-RS resources.
19. The UE of claim 12 , wherein the RI indicates a rank equal to a number of selected layers/ports within the first subset of NZP CSI-RS resources.
20. The UE of claim 12 , wherein the CSI report is associated with a designation of an amount of bundling of resource blocks (RBs) to be used by the network device to transmit a first reference signal (RS) on the first subset of NZP CSI-RS resources.
21. The UE of claim 12 , wherein a signaling for the interference measurement includes at least one of a sequence and layers/ports for interference measurement by the UE.
22. The UE of claim 12 , wherein the set of resources configured for interference measurements for the CSI report include different resources than the first subset of NZP CSI-RS resources.
23. A method for wireless communications, the method comprising:
transmitting, by a network device, control signaling specifying a first subset of non-zero-power (NZP) CSI reference signal (CSI-RS) (NZP CSI-RS) resources and a set of resources configured for interference measurements for channel state information (CSI) report(s) associated with a CSI report configuration;
transmitting, by the network device, reference signals over the first subset of NZP CSI- RS resources; and
receiving, by the network device, a CSI report from a user equipment (UE), the CSI report including a channel quality indicator (CQI) associated with the first subset of NZP CSI-RS resources and a rank indicator (RI) associated with the first subset of NZP CSI-RS resources, the CQI based on a channel measurement on the first subset of NZP CSI-RS resources and an interference measurement on the first subset of NZP CSI-RS resources and a set of resources configured for interference measurements for CSI report(s) associated with the CSI report configuration.
24. The method of claim 23 , wherein the CSI report excludes a precoding matrix indicator (PMI).
25. The method of claim 23 , wherein the set of resources configured for interference measurement include at least a set of CSI interference measurement (CSI-IM) resources.
26. The method of claim 23 , further comprising receiving, by the UE, a configuration of measurement restriction associated with the channel measurement.
27. The method of claim 23 , further comprising receiving a configuration of measurement restriction associated with the interference measurement.
28. The method of claim 23 , wherein the control signaling includes a downlink control information (DCI) message.
29. The method of claim 23 , wherein the RI indicates a rank for a number of layers/ports associated with the first subset of NZP CSI-RS resources.
30. The method of claim 23 , wherein the RI indicates a rank equal to a number of selected layers/ports within the first subset of NZP CSI-RS resources.
31. The method of claim 23 , wherein the CSI report is associated with a designation of an amount of bundling of resource blocks (RBs) to be used by the network device to transmit a first reference signal (RS) on the first subset of NZP CSI-RS resources.
32. The method of claim 23 , wherein a signaling for the interference measurement includes at least one of a sequence and layers/ports for interference measurement by the UE.
33. The method of claim 23 , wherein the set of resources configured for interference measurements for the CSI report include different resources than the first subset of NZP CSI-RS resources.
34. A network device comprising:
a processor; and
a non-transitory computer readable storage medium storing programming for execution by the processor, the programming including instructions to:
transmit control signaling specifying a first subset of non-zero-power (NZP) CSI reference signal (CSI-RS) (NZP CSI-RS) resources and a set of resources configured for interference measurements for channel state information (CSI) report(s) associated with a CSI report configuration;
transmit reference signals over the first subset of NZP CSI-RS resources; and
receive a CSI report from a user equipment (UE), the CSI report including a channel quality indicator (CQI) associated with the first subset of NZP CSI-RS resources and a rank indicator (RI) associated with the first subset of NZP CSI-RS resources, the CQI based on a channel measurement on the first subset of NZP CSI-RS resources and an interference measurement on the first subset of NZP CSI-RS resources and a set of resources configured for interference measurements for CSI report(s) associated with the CSI report configuration.