Handling interference in multi-radio access technology (RAT) wireless transmit/receive unit (WTRU)
Systems, methods, and instrumentalities are disclosed for transmitting a message. For example, a first radio access technology, RAT, and/or a second RAT may be determined. The first RAT may be determined for reception of data. The second RAT may be determined for the reception of the data, perhaps for example based on an indication received via the first RAT. The data may be received via a first node associated with the first RAT and a second node associated with the second RAT.
1. A wireless transmit/receive unit (WTRU) comprising:
a transceiver; and
a processor, wherein the processor is configured to:
receive, from a base station via the transceiver, information that indicates a first set of downlink resources associated with a downlink transmission that uses a New Radio (NR) radio access technology, wherein at least a portion of spectrum utilized by the NR radio access technology is shared with a Long Term Evolution (LTE) radio access technology, resources of the LTE radio access technology are associated with a 15 kHz subcarrier spacing, a first set of frequency resources associated with the 5G NR radio access technology are associated with a first subcarrier spacing, and a second set of frequency resources associated with the 5G NR radio access technology are associated with a second subcarrier spacing;
receive, from the base station via the transceiver using the NR radio access technology, configuration information associated with the LTE radio access technology, wherein the configuration information received using the NR radio access technology indicates cell-specific reference signal transmission information for the LTE radio access technology and a multicast-broadcast single-frequency network (MBSFN) subframe configuration of the LTE radio access technology;
determine that a subset of the first set of downlink resources associated with the downlink transmission that uses the NR radio access technology overlaps with a second set of resources associated with a cell-specific reference signal transmission for the LTE radio access technology based on the cell-specific reference signal transmission information for the LTE radio access technology and the MBSFN subframe configuration of the LTE radio access technology indicated by the configuration information received using the NR radio access technology;
receive, from the base station via the transceiver, the downlink transmission that uses the NR radio access technology; and
puncture the downlink transmission on the subset of the first set of downlink resources on the NR radio access technology that overlaps with the second set of resources associated with the cell-specific reference signal transmission for the LTE radio access technology.
2. The WTRU of claim 1 , wherein the downlink transmission comprises a physical downlink shared data channel (PDSCH) transmission.
3. The WTRU of claim 1 , wherein the first set of downlink resources overlaps with the second set of resources in time and frequency.
4. The WTRU of claim 1 , wherein to receive the downlink transmission on the NR radio access technology via resources of the first set of downlink resource elements that do not overlap with the second set of resources, the processor is further configured to decode the downlink transmission on the NR radio access technology on resources of the first set of downlink resources that do not overlap with the second set of resources.
5. The WTRU of claim 1 , wherein the processor is further configured to determine that the cell-specific reference signal transmission on the LTE radio access technology has a priority that is higher than the downlink transmission on the NR radio access technology.
6. The WTRU of claim 1 , wherein the portion of the spectrum utilized by the NR radio access technology that is shared with the LTE radio access technology comprises an overlapping portion of a 20 MHz LTE bandwidth and a 100 MHz NR bandwidth.
7. A method implemented in a wireless transmit/receive unit (WTRU), the method comprising:
receiving, from a base station via a transceiver, information indicating a first set of downlink resources associated with a downlink transmission that uses a New Radio (NR) radio access technology, wherein at least a portion of spectrum utilized by the NR radio access technology is shared with a Long Term Evolution (LTE) radio access technology, resources of LTE radio access technology are associated with a 15 kHz subcarrier spacing, a first set of frequency resources associated with the 5G NR radio access technology are associated with a first subcarrier spacing, and a second set of frequency resources associated with the 5G NR radio access technology are associated with a second subcarrier spacing;
receiving, from the base station via the transceiver using the NR radio access technology, configuration information associated with the LTE radio access technology, wherein the configuration information received using the NR radio access technology indicates cell-specific reference signal transmission information for the LTE radio access technology and a multicast-broadcast single-frequency network (MBSFN) subframe configuration of the LTE radio access technology;
determining that a subset of the first set of downlink resources associated with the downlink transmission that uses the NR radio access technology overlaps with a second set of resources associated with a cell-specific reference signal transmission for the LTE radio access technology based on the cell-specific reference signal transmission information for the LTE radio access technology and the MBSFN subframe configuration of the LTE radio access technology indicated by the configuration information received using the NR radio access technology;
receiving, from the base station via the transceiver, the downlink transmission that uses the NR radio access technology; and
puncturing the downlink transmission on the subset of the first set of downlink resources on the NR radio access technology that overlaps with the second set of resources associated with the cell-specific reference signal transmission for the LTE radio access technology.
8. The method of claim 7 , wherein the downlink transmission comprises a physical downlink shared data channel (PDSCH) transmission.
9. The method of claim 7 , wherein the first set of downlink resources overlaps with the second set of resources in time and frequency.
10. The method of claim 7 , wherein receiving the downlink transmission on the NR radio access technology via resources of the first set of downlink resources that do not overlap with the second set of resources comprises decoding the downlink transmission on the NR radio access technology on resources of the first set of downlink resource elements that do not overlap with the second set of resources.
11. The method of claim 7 , further comprising determining that the cell-specific reference signal transmission on the LTE radio access technology has a priority that is higher than the downlink transmission on the NR radio access technology.