7.9 UE Assistance Information

When configured to do so, the UE can signal the network through UEAssistanceInformation:

• If it prefers an adjustment in the connected mode DRX cycle length, for the purpose of delay budget reporting;
• If it is experiencing internal overheating;
• If it prefers certain DRX parameter values, and/or a reduced maximum number of secondary component carriers, and/or a reduced maximum aggregated bandwidth and/or a reduced maximum number of MIMO layers and/or minimum scheduling offsets K0 and K2 for power saving purpose;
• If it expects not to send or receive any more data in the near future, and in this case, it can provide its preference to transition out of RRC_CONNECTED where this indication may express its preferred RRC state, or alternately, it may cancel an earlier indicated preference to transition out of RRC_CONNECTED;
• If it prefers (not) to be provisioned with reference time information;
• If it prefers to transition out of RRC_CONNECTED state for MUSIM operation and its preferred RRC state after transition;
• If it wants to include assistance information for setup or release of MUSIM gaps, and/or for setup the priority of periodic MUSIM gaps, and/or for keeping the colliding MUSIM gaps;
• If it prefers to restrict UE capability temporarily or remove the restriction for MUSIM operation;
• When affected by IDC problems that it cannot solve by itself:
• The list of frequencies affected by IDC problems (see clause 23.4 of TS 36.300 [2]);
• The list of frequency ranges/frequency range combinations affected by the IDC problems;
• DRX based TDM assistance information (see clause 23.4.2 of TS 36.300 [2]);
• Its RRM measurement relaxation status indicating whether RRM measurement relaxation criteria are met or not;
• Its RLM measurement relaxation status indicating whether the UE is applying RLM measurements relaxation;
• Its BFD measurement relaxation status indicating whether the UE is applying BFD measurements relaxation;
• If it prefers not operating on multi-Rx (i.e. not supporting simultaneous reception with different QCL-typeD) for FR2;
• If it is in low power state while performing data logging for Network-side data collection;
• If its AS layer memory to log data for Network -side data collection becomes full;
• If its AS layer memory to log data for Network-side data collection reaches a threshold configured by the network;
• If it prefers to start, or stop UE-side data collection for UE-side model;
• Its preference for UE-side data collection configuration(s) from a list of candidate configurations provided by the network for the training of UE-side model(s);
• Its AI/ML functionality applicability status;
• If it prefers to be configured with a specific time offset for LP-WUS monitoring in RRC_CONNECTED;
• Its preference for gap occasion cancellation ratio.

NOTE: The requirements on RRM/RLM/CSI measurements in different phases of IDC interference defined in TS 36.300 [2] are applicable except that for NR serving cell, the requirements in TS 38.133 [13] and TS 38.101-1 [18], TS 38.101-2 [35], TS 38.101-3 [36] apply.

In the second case, the UE can express a preference for temporarily reducing the number of maximum secondary component carriers, the maximum aggregated bandwidth and the number of maximum MIMO layers. In all cases, it is up to the gNB whether to accommodate the request.

For sidelink, the UE can report SL traffic pattern(s) to NG-RAN, for periodic traffic.