Signaling related to dynamic spectrum sharing carrier
Disclosed are techniques for wireless communication. In an aspect, a UE transmits a DSS capability indication to a network entity (e.g., base station), which determines scheduling information for resources of a DSS carrier based on the DSS capability indication. In another aspect, a BS transmits RAT-specific (e.g., LTE-specific) information associated with a DL RS (e.g., LTE CRS) to a UE, which processes the DL RS on a DSS carrier based at least in part on the RAT-specific information.
1. A user equipment (UE), comprising:
a memory;
at least one transceiver; and
at least one processor communicatively coupled to the memory and the at least one transceiver, the at least one processor configured to:
transmit, via the at least one transceiver, to a network entity, a dynamic spectrum sharing (DSS) capability indication, wherein the DSS capability indication indicates that the UE supports communications over a DSS carrier on which first radio access technology (RAT) signaling and second RAT signaling are scheduled; and
receive, via the at least one transceiver, from the network entity, scheduling information for resources on the DSS carrier based at least in part upon the DSS capability indication,
wherein the DSS capability indication includes:
an indication of whether processing of second RAT Multimedia Broadcast multicast service Single Frequency Network (MBSFN) subframes is supported by the UE, or
at least one supported port configuration associated with a second RAT downlink (DL) reference signal (RS) for a non-MBSFN subframe, wherein the second RAT DL RS is broadcast or multicast to UEs on the DSS carrier, or
at least one alternative demodulation reference signal (DMRS) location on the DSS carrier, or
at least one tracking reference signal (TRS) configuration for time, frequency, phase, ranging, positioning or a combination thereof on the DSS carrier, or
at least one channel state information reference signal (CSI-RS) on the DSS carrier, or
a combination thereof.
2. The UE of claim 1 , wherein the scheduling information allocates to the UE, in a second RAT Multimedia Broadcast multicast service Single Frequency Network (MBSFN) subframe, one or more symbols for one or more physical channels carrying control information of the first RAT that is punctured or rate-matched based on:
a second RAT downlink (DL) reference signal (RS),
one or more DL control channels of the second RAT, or
both.
3. The UE of claim 1 , wherein the scheduling information allocates to the UE, in a second RAT non-Multimedia Broadcast multicast service Single Frequency Network (non-MBSFN) subframe, one or more symbols for one or more physical channels carrying control information of the first RAT that punctured or rate-matched based on:
a second RAT downlink (DL) reference signal (RS),
one or more DL control channels of the second RAT, or
both.
4. The UE of claim 1 , wherein the scheduling information allocates to the UE, in a second RAT non-Multimedia Broadcast multicast service Single Frequency Network (non-MBSFN) subframe, one or more resource elements (REs) for one or more physical channels control information of the first RAT that is punctured or rate-matched based on:
a second RAT downlink (DL) reference signal (RS),
one or more DL control channels of the second RAT, or
both.
5. The UE of claim 1 , wherein the UE corresponds to a reduced capability (RedCap) UE, which operates on the DSS carrier and is capable of processing downlink (DL) reference signals (RSs) from the first RAT and the second RAT.
6. A network entity, comprising:
a memory;
at least one transceiver; and
at least one processor communicatively coupled to the memory and the at least one transceiver, the at least one processor configured to:
receive, via the at least one transceiver, from a user equipment (UE), an indication of a dynamic spectrum sharing (DSS) capability indication, wherein the DSS capability indication indicates that the UE supports communications over a DSS carrier on which first radio access technology (RAT) signaling and second RAT signaling are scheduled; and
transmit, via the at least one transceiver, scheduling information for resources on the DSS carrier based at least in part upon the DSS capability indication,
wherein the DSS capability indication includes:
an indication of whether processing of second RAT Multimedia Broadcast multicast service Single Frequency Network (MBSFN) subframes is supported by the UE, or
at least one supported port configuration associated with a second RAT downlink (DL) reference signal (RS) for a non-MBSFN subframe, wherein the second RAT DL RS is broadcast or multicast to UEs on the DSS carrier, or
at least one alternative demodulation reference signal (DMRS) location on the DSS carrier, or
at least one tracking reference signal (TRS) configuration for time, frequency, phase, ranging, positioning or a combination thereof on the DSS carrier, or
at least one channel state information reference signal (CSI-RS) on the DSS carrier, or
a combination thereof.
7. The network entity of claim 6 , wherein the scheduling information allocates to the UE, in a second RAT Multimedia Broadcast multicast service Single Frequency Network (MBSFN) subframe, one or more symbols for one or more physical channels carrying control information of the first RAT that is punctured or rate-matched based on:
a second RAT downlink (DL) reference signal (RS),
one or more DL control channels of the second RAT, or
both.
8. The network entity of claim 6 , wherein the scheduling information allocates to the UE, in a second RAT non-Multimedia Broadcast multicast service Single Frequency Network (non-MBSFN) subframe, one or more symbols for one or more physical channels carrying control information of the first RAT that is punctured or rate-matched based on:
a second RAT downlink (DL) reference signal (RS),
one or more DL control channels of the second RAT, or
both.
9. The network entity of claim 6 , wherein the scheduling information allocates to the UE, in a second RAT non-Multimedia Broadcast multicast service Single Frequency Network (non-MBSFN) subframe, one or more resource elements (REs) for one or more physical channels carrying control information of the first RAT that is punctured or rate-matched based on:
a second RAT downlink (DL) reference signal (RS),
one or more DL control channels of the second RAT, or
both.
10. The network entity of claim 6 , wherein the UE corresponds to a reduced capability (RedCap) UE.