Radio link monitoring (RLM) evaluation mechanism for new radio (NR) systems
Methods, systems, and storage media are described for radio link monitoring (RLM) for new radio (NR). Other embodiments may be described and/or claimed.
1. One or more non-transitory, computer-readable media having instructions that, when executed, cause a user equipment (UE) to:
process configuration information received from a base station (BS), wherein the configuration information includes a first parameter indicating an index of a reference signal (RS) and a second parameter indicating a type of RS to be used for radio link monitoring (RLM);
determine, based on the configuration information, the type of RS indicated by the second parameter in the configuration information to be used for RLM, wherein the type of RS used for RLM comprises a subset of channel state information-reference signal (CSI-RS) resources configured for beam management (BM) including P1 beam management for initial beam establishment, and wherein an evaluation of the subset of CSI-RS resources reflects a quality of connection between the UE and the BS, and the subset of CSI-RS resources and a hypothetical physical downlink control channel (PDCCH) signal are both configured with a same beamforming configuration; and
perform RLM based on the determined type of RS to be used for RLM.
2. The one or more non-transitory, computer-readable media of claim 1 , wherein the beamforming configuration is a receive (Rx) beamforming configuration or a transmit (Tx) beamforming configuration.
3. The one or more non-transitory, computer-readable media of claim 1 , wherein the configuration information is to indicate a slot, or symbol of the RS to be used for RLM.
4. The one or more non-transitory, computer-readable media of claim 1 , wherein the configuration information is to indicate a number of RSs, which have a highest reference signal receive power (RSRP), that are to be used for RLM.
5. The one or more non-transitory, computer-readable media of claim 1 , wherein the configuration information is to include a bitmap, the bitmap including a first bit to indicate a first synchronization sequence block (SSB) to be used for RLM, and a second bit to indicate a second SSB not to be used for RLM.
6. The one or more non-transitory, computer-readable media of claim 1 , wherein to perform RLM, the instructions cause the UE to evaluate the type of RSs for RLM for an evaluation period that is at least one subframe or at least one time slot.
7. An apparatus comprising:
memory to store configuration information to identify a type of reference signal (RS) to be used for radio link monitoring (RLM) for a user equipment (UE), wherein the configuration information includes a first parameter to indicate an index of an RS and a second parameter to indicate the type of RS to be used for RLM, wherein the type of RS used for RLM comprises a subset of channel state information-reference signal (CSI-RS) resources configured for beam management (BM) including P1 beam management for initial beam establishment, and wherein an evaluation of the subset of CSI-RS resources reflects a quality of connection between the UE and a base station (BS), and the subset of CSI-RS resources and a hypothetical physical downlink control channel (PDCCH) signal are both configured with a same beamforming configuration; and
processing circuitry, coupled with the memory, to:
generate a message containing the configuration information including the first parameter and the second parameter; and
encode the message for transmission to the UE.
8. The apparatus of claim 7 , wherein the configuration information is to indicate a slot or symbol of the RS to be used for RLM.
9. The apparatus of claim 7 , wherein the configuration information is to indicate a number of RSs, which have a highest reference signal receive power (RSRP), that are to be used for RLM.
10. The apparatus of claim 7 , wherein the configuration information is to include a bitmap, the bitmap including a first bit to indicate a first synchronization sequence block (SSB) to be used for RLM, and a second bit to indicate a second SSB not to be used for RLM.
11. A user equipment (UE) comprising:
a memory to store configuration information, wherein the configuration information is received from a base station (BS) and includes a first parameter indicating an index of a reference signal (RS) and a second parameter indicating a type of RS to be used for radio link monitoring (RLM); and
processing circuitry, coupled with the memory, to:
determine, based on the configuration information, the type of RS indicated by the second parameter in the configuration information to be used for RLM, wherein the type of RS used for RLM comprises a subset of channel state information-reference signal (CSI-RS) resources configured for beam management (BM) including P1 beam management for initial beam establishment, and wherein an evaluation of the subset of CSI-RS resources reflects a quality of connection between the UE and the BS, and the subset of CSI-RS resources and a hypothetical physical downlink control channel (PDCCH) signal are both configured with a same beamforming configuration; and
perform RLM based on the determined type of RS to be used for RLM.
12. The UE of claim 11 , wherein the beamforming configuration is a receive (Rx) beamforming configuration or a transmit (Tx) beamforming configuration.
13. The UE of claim 11 , wherein the configuration information is to indicate a slot or symbol of the RS to be used for RLM.
14. The UE of claim 11 , wherein the configuration information is to indicate a number of RSs, which have a highest reference signal receive power (RSRP), that are to be used for RLM.
15. The UE of claim 11 , wherein the configuration information is to include a bitmap, the bitmap including a first bit to indicate a first synchronization sequence block (SSB) to be used for RLM, and a second bit to indicate a second SSB not to be used for RLM.