# US 8,543,089 B2 · Method for performing an authentication of entities during establishment of wireless call connection

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- Number: US 8,543,089 B2
- Document ID: US8543089B2
- Status: Granted
- Kind: B2
- Application number: 12/596,660
- Filed: 2008-04-30
- Published: 2010-06-10
- Granted: 2013-09-24
- Earliest claimed: 2007-04-30
- Assignees: LG Electronics Inc.
- Applicants: Sung-Duck Chun; Young-Dae Lee; Sung-Jun Park; Seung-June Yi
- Inventors: Sung-Duck Chun; Young-Dae Lee; Sung-Jun Park; Seung-June Yi
- Web page: https://patentgrep.com/patent/US8543089B2

## CPC

- H04W 28/06: Optimizing {the usage of the radio link}, e.g. header compression, information sizing {, discarding information (system modifying transmission characteristic according to link quality by modifying frame length H04L1/0007; dynamic adaptation of the packet size for flow control or congestion control H04L47/365)}
- H04L 63/20: {for managing network security; network security policies in general (filtering policies H04L63/0227)}
- H04W 12/033: of the user plane, e.g. user's traffic
- H04W 12/037: of the control plane, e.g. signalling traffic
- H04W 12/106: Packet or message integrity
- H04W 76/10: Connection setup
- H04W 80/02: Data link layer protocols
- H04W 92/10: between terminal device and access point, i.e. wireless air interface
- H04W: WIRELESS COMMUNICATION NETWORKS (broadcast communication H04H; communication systems using wireless links for non-selective communication, e.g. wireless extensions H04M1/72)
- H04L: TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION (arrangements common to telegraphic and telephonic communication H04M)

## Abstract

Disclosed is the method for establishing a connection between a base station and a terminal so as to transmit and receive data in the E-UMTS (Evolved Universal Mobile Telecommunications System) or LTE (Long-Term Evolution) system, and more particularly, to a method for determining, by each entity, whether to establish a connection by comparing an authentication input value transmitted from a counterpart entity with an authentication input range.

## Claims

### Claim 1

A method of performing a security setup process in a mobile communications system, the method comprising:
determining, by a terminal, a candidate set for a security setup parameter,
wherein the candidate set is determined by a security setup reference value and a security setting window size value or is determined by the security setup reference value, the security setting window size value and an offset value;
receiving a parameter related to a security setup; and
determining whether or not the received parameter is matched with at least one of the determined candidate set.

### Claim 2 (depends on 1)

The method of claim 1, further comprising:
terminating at least an RRC (Radio Resource Control) connection, a NAS (non-access stratum) connection or a call connection between the terminal and a network, if the received parameter is not matched with the at least one of the determined candidate set.

### Claim 3 (depends on 1)

The method of claim 1, wherein the candidate set is determined by adding the security setup reference value and the security setting window size value.

### Claim 4 (depends on 3)

The method of claim 3, wherein the security setup reference value is a HFN (hyper frame number).

### Claim 5 (depends on 4)

The method of claim 4, wherein the security setup reference value is the highest HFN among a plurality of HFN used in a radio bearer that is applied to the security setup process.

### Claim 6 (depends on 3)

The method of claim 3, wherein the security setting window size value is received from a network during a call setup.

### Claim 7 (depends on 3)

The method of claim 3, wherein the security setting window size value is received from a network through system information (SI).

### Claim 8

A mobile terminal for performing a security setup process in a mobile communications system, the mobile terminal comprising:
a radio protocol entity adapted to determine a candidate set for a security setup parameter, to receive a parameter related to a security setup, and to determine whether or not the received parameter is matched with at least one of the determined candidate set,
wherein the candidate set is determined by a security setup reference value and a security setting window size value or is determined by the security setup reference value, the security setting window size value and an offset value.