InterDigital Inc (IDCC)

[Gamco]

United States Patent 9,801,072
Somasundaram , et al. October 24, 2017

Non-access stratum architecture and protocol enhancements for long term evolution mobile units


Abstract

A method and apparatus performs processing of the non-access stratus (NAS) layer (layer 3) in long term evolution (LTE) wireless transmit/receive units (WTRUs), which allows the NAS protocol layer to route layer 3 messages to the correct NAS entity, and to encode new NAS message types and information elements. A new architecture is presented that enables NAS security. When a NAS message is generated, a determination is made as to whether or not to cipher, de-cipher and/or integrity check the NAS message based on at least one of a protocol discriminator (PD) of the NAS message, an indicator field in a header of the NAS message, the type of the NAS message, a NAS security state variable, and an indication by an upper layer protocol. The NAS security state variable indicates whether NAS security is currently active or not and may comprise one bit.



Inventors:
Somasundaram; Shankar (Sunnyvale, CA), Mukherjee; Rajat P. (Toronto, CA)

Applicant:


Name

City

State

Country

Type


InterDigital Patent Holdings, Inc.
Wilmington
DE
US


Assignee:
InterDigital Patent Holdings, Inc. (Wilmington, DE)


Family ID:
1000002909673

Appl. No.:
15/225,443

Filed:
August 1, 2016


Prior Publication Data






Document Identifier

Publication Date

US 20160345177 A1 Nov 24, 2016



Related U.S. Patent Documents









Application Number

Filing Date

Patent Number

Issue Date

14635533 Mar 2, 2015 9408080
14021436 Mar 3, 2015 8971847
12254265 Sep 10, 2013 8532614
60982698 Oct 25, 2007




Current U.S. Class: 1/1
Current CPC Class: H04W 12/08 (20130101); H04W 12/00 (20130101); H04W 80/02 (20130101); H04W 12/10 (20130101); H04W 12/02 (20130101)
Current International Class: H04M 1/66 (20060101); H04W 12/08 (20090101); H04W 12/02 (20090101); H04W 12/10 (20090101); H04W 80/02 (20090101); H04W 12/00 (20090101)

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