US 12,107,777 B2
Method for transmitting downlink packet in function-separated core network
Sangsoo Jeong, Seoul (KR)
Assigned to SK TELECOM CO., LTD., Seoul (KR)
Filed by SK TELECOM CO., LTD., Seoul (KR)
Filed on Apr. 3, 2020, as Appl. No. 16/840,321.
Application 16/840,321 is a continuation of application No. 16/044,906, filed on Jul. 25, 2018, granted, now 10,659,397.
Application 16/044,906 is a continuation of application No. PCT/KR2016/013330, filed on Nov. 18, 2016.
Claims priority of application No. 10-2016-0008674 (KR), filed on Jan. 25, 2016.
Prior Publication US 2020/0236067 A1, Jul. 23, 2020
This patent is subject to a terminal disclaimer.
Int. Cl. H04W 28/14 (2009.01); H04L 49/90 (2022.01); H04W 28/02 (2009.01); H04W 40/34 (2009.01); H04W 72/542 (2023.01); H04W 88/16 (2009.01); H04W 88/02 (2009.01); H04W 88/08 (2009.01)
CPC H04L 49/90 (2013.01) [H04W 28/0278 (2013.01); H04W 28/14 (2013.01); H04W 40/34 (2013.01); H04W 72/542 (2023.01); H04W 88/16 (2013.01); H04W 88/02 (2013.01); H04W 88/08 (2013.01)] 12 Claims
OG exemplary drawing
 
1. A method for transmitting a downlink packet to a user equipment (UE) in an idle mode in a mobile communication system in which a gateway is separated into a user plane node and a control plane node, the method comprising:
receiving, by the user plane node, an update command message including a preset buffering time from the control plane node;
receiving and buffering, by the user plane node, the downlink packet for the UE;
transmitting, by the user plane node, a notification message of a reception of the downlink packet to the control plane node;
transmitting, by the user plane node, the buffered downlink packet to the UE through a base station; and
delaying, by the user plane node, the notification message of the reception of the downlink packet to the control plane node based on buffering timers,
wherein the user plane node is separated into a first user plane node and a second user plane node, and
wherein the update command message is a message instructing update of a forwarding table to receive the downlink packet generated in the idle mode of the UE by the second user plan node, not by the first user plane node.