公开(公告)号：USRE49357E1

公开(公告)日：2023-01-03

申请号：US15478904

申请日：2017-04-04

Applicant: Samsung Electronics Co., Ltd.

Inventor： Han-Na Lim ,  Tae-Sun Yeoum ,  Eun-Hui Bae ,  O-Sok Song ,  Sung-Ho Choi

IPC: G06F15/16 ,  H04L29/06 ,  H04L65/1095 ,  H04L65/1073 ,  H04L65/1016 ,  H04L65/1104 ,  H04W60/06 ,  H04L69/40

Abstract: A method and system in which upon occurrence of a P-CSCF failure, a network sends an IMS reregistration request message to a UE. An S-CSCF or an AS monitors a P-CSCF to detect occurrence of a failure in the P-CSCF. Upon detecting the occurrence of a P-CSCF failure, the S-CSCF or the AS sends a request message for IMS reregistration to the UEs being served by the failed P-CSCF. In this manner, the UE can continuously receive the service even though a failure occurs in the P-CSCF.

公开(公告)号：US09955394B2

公开(公告)日：2018-04-24

申请号：US14987281

申请日：2016-01-04

Applicant: Samsung Electronics Co., Ltd.

Inventor： Eun-Hui Bae ,  Sung-Ho Choi ,  O-Sok Song ,  Han-Na Lim

IPC: H04W76/02 ,  H04W36/14 ,  H04W36/00 ,  H04W24/10 ,  H04W36/18

CPC classification number: H04W36/14 ,  H04W24/10 ,  H04W36/0011 ,  H04W36/18 ,  H04W76/12

Abstract: A method and apparatus for performing a L3 handover between CNs in a packet-switched network are provided. When a UE moves from an old RAN to a new RAN, the UE sends a measurement report message including cell information to the old RAN. The old or new RAN determines whether to perform a L3 handover. If the L3 handover is required, a tunnel is established between the new RAN and a new CN. The UE performs a handover from the old RAN to the new RAN, without establishing a tunnel between the new RAN and an old CN. Upon detection of the movement of the UE, the new RAN sends a L2 handover complete message to the old RAN. After moving to the new RAN, the UE acquires a new IP address, performs the L3 handover, and communicates with the new CN through the new RAN.

公开(公告)号：US09729223B2

公开(公告)日：2017-08-08

申请号：US14624242

申请日：2015-02-17

Applicant: Samsung Electronics Co., Ltd.

Inventor： Kyeong-In Jeong ,  Soeng-Hun Kim ,  Sung-Ho Choi ,  O-Sok Song ,  Gert-Jan Van Lieshout ,  Himke Van Der Velde

IPC: H04B1/00 ,  H04B7/00 ,  H04W24/10 ,  H04B7/06 ,  H04W76/04 ,  H04W52/02 ,  H04L5/00 ,  H04W72/04

CPC classification number: H04B7/0632 ,  H04L5/0007 ,  H04L5/0053 ,  H04L5/0057 ,  H04L5/0085 ,  H04W24/10 ,  H04W52/0216 ,  H04W72/04 ,  H04W76/28 ,  Y02D70/1224 ,  Y02D70/1242 ,  Y02D70/1262 ,  Y02D70/24 ,  Y02D70/25

Abstract: A method and apparatus for transmitting and receiving CQI in a wireless communication system are provided. The method includes receiving, by a mobile station, CQI report resource information, CQI period information, and Discontinuous Reception (DRX) cycle information; discontinuously monitoring, by the mobile station, a channel based on the DRX cycle information; and reporting a CQI to a network, based on the CQI report resource information, the CQI period information, and the DRX cycle information

公开(公告)号：US10091686B2

公开(公告)日：2018-10-02

申请号：US14139154

申请日：2013-12-23

Applicant: Samsung Electronics Co., Ltd.

Inventor： Soeng-Hun Kim ,  Sung-Ho Choi ,  O-Sok Song ,  Gert Jan Van Lieshout ,  Himke Van Der Velde

IPC: H04L12/24 ,  H04W28/02 ,  H04L1/16 ,  H04L1/18 ,  H04W36/02

Abstract: A method for transmitting packet data units Packet Data Units (PDUs) at a PDU transmitter in a communication system is provided. The method includes transmitting a first PDU comprising a PDU header and a data portion, receiving Negative Acknowledgement NACK information for the first PDU, segmenting the first PDU to form one or more PDU segments if a size of a second PDU for retransmission is smaller than a size of the first PDU, wherein each of the one or more PDU segment comprises a PDU segment header and a data portion, and transmitting the one or more PDU segment to a PDU receiver.