Section: 20.4 Temporary UE capability restriction and removal of restriction
Content: For MUSIM operation, a MUSIM device in RRC_CONNECTED state in Network A may indicate its preference on temporary UE capability restriction or removal of restriction with Network A when the MUSIM device needs transmission or reception in Network B (e.g., including start/stop connection to Network B). Network A is NR and Network B can either be E-UTRA or NR. The MUSIM device may request a temporary capability restriction only after the Network signals via RRC that this is allowed. When configured to do so, a MUSIM device can indicate one or more of the following temporary capability restriction or removal of restriction to the Network A: - A MUSIM device can explicitly request SCell(s) or SCG to be released; - A MUSIM device can indicate its preference on temporary maximum MIMO layers and/or supported channel bandwidth for specific serving cells for both UL/DL; - A MUSIM device can indicate its preference on the temporary maximum number of CCs per UL/DL; - A MUSIM device can indicate its preference on the concerned band(s) or band combination(s) (e.g. forbidden and/or affected band(s) or band combination(s)) based on a band-filter list configured by network. For affected band(s) and band combination(s), this preference can include temporary maximum MIMO layers and/or supported channel bandwidth for both UL/DL; - A MUSIM device can indicate the measurement gap requirement changes. When it is allowed by Network A in SIB1, a MUSIM device can indicate to the Network A that its capabilities are temporarily restricted in RRCSetupComplete/RRCResumeComplete message while the MUSIM device is already in RRC_CONNECTED state in Network B. When a MUSIM device is in RRC_CONNECTED state in both Network A and Network B, if Network B is NR, it is up to UE implementation to select which network to request temporary UE capability restriction; if Network B is E-UTRA, the request for temporary UE capability restriction can only be performed on Network A.