Radio in-device coexistence in wideband system
In some wireless systems (e.g., 5G new radio (NR) systems), a user equipment (UE) may experience coexistence interference when using collocated radio transceivers to simultaneously communicate using different radio access technologies (RATs). To mitigate the coexistence interference, the UE may transmit a configuration request to a base station, where the configuration request may identify that the UE is operating on multiple RATs and identify that the UE is experiencing coexistence interference. Aspects of the present disclosure may further provide techniques for coexistence interference mitigation in wideband systems by allowing the UE to indicate the specific bandwidth parts (BVVPs) that are impacted by IDC interference to the base station such that the network can resolve the IDC interference by reconfiguring the bandwidth, instead of performing inter-frequency handover or removing/deactivating affected SCells.
1. A method for wireless communications at a user equipment (UE), comprising:
receiving, at a first radio access technology (RAT) transceiver of the UE, a first signal from a first network;
receiving, at a second RAT transceiver of the UE, a second signal from a second network;
detecting in-device coexistence (IDC) interference at the UE from the first signal and the second signal on at least one bandwidth part (BWP), wherein the BWP is a contiguous subset of physical resource blocks (PRBs) from a set of PRBs on a wideband carrier;
generating an IDC interference indication message that includes a BWP identification (ID) associated with the at least one BWP where the UE detects IDC interference; and
transmitting the IDC interference indication message to a base station.
2. The method of claim 1 , wherein detecting the IDC interference at the UE from the first signal and the second signal on the at least one BWP, comprises:
identifying one or more BWP IDs associated one or more BWPs with each serving frequency for which the UE has been configured by the base station to monitor for IDC interference;
monitoring only the one or more BWPs for which the UE has been configured by the base station; and
detecting the IDC interference at the UE from the first signal and the second signal on the at least one BWP from the one or more BWPs monitored by the UE.
3. The method of claim 2 , further comprising:
receiving a subband configuration for one or more subbands associated with the one or more BWP IDs from the base station for which the UE monitors for the IDC interference, wherein the subband configuration includes subband ID and a frequency location of the subband for which the UE monitors for the IDC interference.
4. The method of claim 3 , wherein the subband configuration from the base station includes one or more reusing subbands configured for channel state information (CSI) reporting, configuring starting frequency location and ending frequency location for each subband, or configuring central frequency location and bandwidth for each subband.
5. The method of claim 1 , wherein detecting the IDC interference at the UE from the first signal and the second signal on the at least one BWP, comprises:
monitoring an entire bandwidth on a serving frequency for the IDC interference; and
detecting the IDC interference at the UE from the first signal and the second signal on the at least one BWP from the one or more BWPs monitored by the UE.
6. The method of claim 1 , wherein the IDC interference indication message further includes one or more of BWP dedicated time division multiplex (TDM) pattern, discontinuous reception (DRX) pattern, autonomous denial configuration, or hardware issue indication.
7. The method of claim 1 , further comprising:
receiving, at the UE, an IDC interference mitigation message from the base station in response to the IDC interference indication message.
8. A user equipment (UE) for wireless communications, comprising:
a memory configured to store instructions;
a processor communicatively coupled with the memory, the processor configured to execute the instructions to:
receive, at a first radio access technology (RAT) transceiver of the UE, a first signal from a first network;
receive, at a second RAT transceiver of the UE, a second signal from a second network;
detect in-device coexistence (IDC) interference at the UE from the first signal and the second signal on at least one bandwidth part (BWP), wherein the BWP is a contiguous subset of physical resource blocks (PRBs) from a set of PRBs on a wideband carrier;
generate an IDC interference indication message that includes a BWP identification (ID) associated with the at least one BWP where the UE detects IDC interference; and
transmit the IDC interference indication message to a base station.
9. A non-transitory computer readable medium storing instructions, executable by a processor of a user equipment (UE), for wireless communications, comprising instructions for:
receiving, at a first radio access technology (RAT) transceiver of the UE, a first signal from a first network;
receiving, at a second RAT transceiver of the UE, a second signal from a second network;
detecting in-device coexistence (IDC) interference at the UE from the first signal and the second signal on at least one bandwidth part (BWP), wherein the BWP is a contiguous subset of physical resource blocks (PRBs) from a set of PRBs on a wideband carrier;
generating an IDC interference indication message that includes a BWP identification (ID) associated with the at least one BWP where the UE detects IDC interference; and
transmitting the IDC interference indication message to a base station.
10. An apparatus for wireless communications implemented on a user equipment (UE), comprising:
means for receiving, at a first radio access technology (RAT) transceiver of the UE, a first signal from a first network;
means for receiving, at a second RAT transceiver of the UE, a second signal from a second network;
means for detecting in-device coexistence (IDC) interference at the UE from the first signal and the second signal on at least one bandwidth part (BWP), wherein the BWP is a contiguous subset of physical resource blocks (PRBs) from a set of PRBs on a wideband carrier;
means for generating an IDC interference indication message that includes a BWP identification (ID) associated with the at least one BWP where the UE detects IDC interference; and
means for transmitting the IDC interference indication message to a base station.
11. A method of wireless communication implemented by a base station, comprising:
receiving, at the base station, an IDC interference indication message from a user equipment (UE) identifying at least one or more bandwidth part (BWP) identifications ID(s) associated with one or more BWPs at which the UE is experiencing IDC interference;
determining an IDC interference mitigation solution to implement for the UE at the one or more BWPs in response to receiving the IDC interference indication message, wherein the IDC interference mitigation solution includes one of frequency division multiplexing (FDM) or time division multiplexing (TDM) communication between the UE and the base station on the at least one or more BWPs; and
transmitting an interference mitigation message to the UE identifying the IDC interference mitigation solution, wherein the UE configures its communication with the base station based on the IDC interference mitigation solution.
12. A base station for wireless communications, comprising:
a memory configured to store instructions; and
a processor communicatively coupled with the memory, the processor configured to execute the instructions to:
receive, at the base station, an IDC interference indication message from a user equipment (UE) identifying at least one or more bandwidth part (BWP) identifications ID(s) associated with one or more BWPs at which the UE is experiencing IDC interference;
determine an IDC interference mitigation solution to implement for the UE at the one or more BWPs in response to receiving the IDC interference indication message, wherein the IDC interference mitigation solution includes one of frequency division multiplexing (FDM) or time division multiplexing (TDM) communication between the UE and the base station on the at least one or more BWPs; and
transmit an interference mitigation message to the UE identifying the IDC interference mitigation solution, wherein the UE configures its communication with the base station based on the IDC interference mitigation solution.
13. A non-transitory computer readable medium storing instructions, executable by a processor of a base station, for wireless communications, comprising instructions for:
receiving, at the base station, an IDC interference indication message from a user equipment (UE) identifying at least one or more bandwidth part (BWP) identifications ID(s) associated with one or more BWPs at which the UE is experiencing IDC interference;
determining an IDC interference mitigation solution to implement for the UE at the one or more BWPs in response to receiving the IDC interference indication message, wherein the IDC interference mitigation solution includes one of frequency division multiplexing (FDM) or time division multiplexing (TDM) communication between the UE and the base station on the at least one or more BWPs; and
transmitting an interference mitigation message to the UE identifying the IDC interference mitigation solution, wherein the UE configures its communication with the base station based on the IDC interference mitigation solution.
14. An apparatus for wireless communications implemented on a base station, comprising:
means for receiving, at the base station, an IDC interference indication message from a user equipment (UE) identifying at least one or more bandwidth part (BWP) identifications ID(s) associated with one or more BWPs at which the UE is experiencing IDC interference;
means for determining an IDC interference mitigation solution to implement for the UE at the one or more BWPs in response to receiving the IDC interference indication message, wherein the IDC interference mitigation solution includes one of frequency division multiplexing (FDM) or time division multiplexing (TDM) communication between the UE and the base station on the at least one or more BWPs; and
means for transmitting an interference mitigation message to the UE identifying the IDC interference mitigation solution, wherein the UE configures its communication with the base station based on the IDC interference mitigation solution.