US 12,432,611 B2
Method to support mobile terminated small data transmission in radio resource control inactive state
Sankaran Balasubramaniam, Bangalore (IN); and Ethiraj Alwar, Bangalore (IN)
Assigned to Nokia Technologies Oy, Espoo (FI)
Filed by Nokia Technologies Oy, Espoo (FI)
Filed on Jul. 26, 2023, as Appl. No. 18/359,131.
Claims priority of application No. 202241056198 (IN), filed on Sep. 30, 2022.
Prior Publication US 2024/0114381 A1, Apr. 4, 2024
Int. Cl. H04W 28/02 (2009.01); H04W 68/02 (2009.01); H04W 76/30 (2018.01)
CPC H04W 28/0268 (2013.01) [H04W 68/02 (2013.01); H04W 76/30 (2018.02)] 14 Claims
OG exemplary drawing
 
1. An apparatus comprising:
at least one processor; and
at least one non-transitory memory including computer program code, where the at least one non-transitory memory and the computer program code are configured, with the at least one processor, to cause the apparatus to at least:
receive, by a network node central unit control plane, information comprising an indication of a downlink data notification for a small data transmission (SDT), wherein the information comprises a quality-of-service (QoS) flow identification for the SDT,
based on the information, identify that the downlink data notification is for a SDT user equipment, wherein the QoS flow identification is mapped to a stored data radio bearer identification to identify that the downlink data notification is for the SDT user equipment,
based on the identifying, send towards a network node distributed unit associated with the SDT user equipment an application protocol paging message, wherein the application protocol paging message causes a context setup for the SDT user equipment as part of radio resource control resume message handling,
transmit, to the network node distributed unit associated with the SDT user equipment, user equipment context setup request information comprising an indication of a small data payload of the SDT transmission, the indication of the small data payload causing a message 4 of a random access procedure from the network node distributed unit to the SDT user equipment to comprise information of both the small data payload and a radio resource control release, wherein the radio resource control release comprises a user equipment context release configuration to release resources that are no longer needed based on the context setup.