公开(公告)号：US20200077268A1

公开(公告)日：2020-03-05

申请号：US16679707

申请日：2019-11-11

Applicant: QUALCOMM Incorporated

Inventor： Swathi SESHADRI ,  Cogol TINA ,  Abhishek BHATNAGAR ,  Mona AGRAWAL

IPC: H04W12/08 ,  H04W48/16 ,  H04L29/06 ,  H04W60/00 ,  H04W12/00 ,  H04W4/021 ,  H04W12/12

Abstract: Methods, systems, and devices for wireless communication are described. A user equipment (UE) may be configured to include procedures to mitigate denial of service (DoS) attack by a rogue base station when the initial non-access stratum (NAS) messages between the UE and a mobility management entity (MME) is unprotected. UE may maintain a temporary forbidden network list, which resides outside a subscriber identity module (SIM), and update a forbidden network list, which resides on the SIM, only under certain conditions. For example, a visited network, from which the UE receives a reject message, may be added to the forbidden network list on the SIM only when a counter associated with the visited network is equal to a maximum counter value, which is configured by the UE.

公开(公告)号：US20220078617A1

公开(公告)日：2022-03-10

申请号：US17468331

申请日：2021-09-07

Applicant: QUALCOMM Incorporated

Inventor： Xuepan GUAN ,  Osama LOTFALLAH ,  Vitaly DRAPKIN ,  Cogol TINA ,  Swathi SESHADRI

IPC: H04W12/08 ,  H04W76/10 ,  H04L29/06

Abstract: Techniques and apparatus for optimizing an initial access stratum security mode command procedure are described. One example technique includes sending a first service request to establish a connection with a network. A second service request is sent to the network, upon determining that one or more criteria is satisfied. Another example technique includes sending a first service request to establish a connection with a network and sending a second service request after sending the first service request. The first service request is associated with a first security parameter and the second service request is associated with a second security parameter. A security mode command procedure is participated in with a base station, based on the first security parameter and the second security parameter.

公开(公告)号：US20240205754A1

公开(公告)日：2024-06-20

申请号：US18285760

申请日：2021-06-13

Applicant: QUALCOMM Incorporated

Inventor： Sanjay KUMAR ,  Bapineedu Chowdary GUMMADI ,  Jianqiang ZHANG ,  Swathi SESHADRI

IPC: H04W36/00

CPC classification number: H04W36/0022 ,  H04W36/0079

Abstract: Apparatus, methods, and computer-readable media for facilitating handling of voice over service fallback are disclosed herein. An example method for wireless communication at a UE includes initiating a TAU procedure when performing a change from a first cell associated with a first RAT to connect to a second cell associated with a second RAT different than the first RAT. The example method also includes initiating a timer when the TAU procedure fails, the timer associated with a first duration. The example method also includes re-initiating the TAU procedure based on an occurrence of a timer modification event, the re-initiating of the TAU procedure occurring before the first duration associated with the timer expires.

公开(公告)号：US20190053054A1

公开(公告)日：2019-02-14

申请号：US16031803

申请日：2018-07-10

Applicant: QUALCOMM Incorporated

Inventor： Swathi SESHADRI ,  Cogol TINA ,  Abhishek BHATNAGAR ,  Mona AGRAWAL

IPC: H04W12/08 ,  H04W48/16

Abstract: Methods, systems, and devices for wireless communication are described. A user equipment (UE) may be configured to include procedures to mitigate denial of service (DoS) attack by a rogue base station when the initial non-access stratum (NAS) messages between the UE and a mobility management entity (MME) is unprotected. UE may maintain a temporary forbidden network list, which resides outside a subscriber identity module (SIM), and update a forbidden network list, which resides on the SIM, only under certain conditions. For example, a visited network, from which the UE receives a reject message, may be added to the forbidden network list on the SIM only when a counter associated with the visited network is equal to a maximum counter value, which is configured by the UE.