LTE-Advanced에서의 Machine Type Communications을 위한 그룹 기반 보안 프로토콜
An Group-based Security Protocol for Machine Type Communications in LTE-Advanced
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초록
사람이 개입할 필요 없이 기기 및 사물들을 셀룰러 망(cellular network)으로 연결하여 언제 어디서나 다양한 서비스를 제공하는 MTC(Machine Type Communications)는 차세대 통신의 주요 이슈로 고려되고 있다. 현재,다수의 MTC 단말들이 동시적으로 망에 접속하려고 하면 각 MTC 단말들은 독립적인 접근 인증 절차를 수행해야 된다. 이로 인해 LTE-Advanced 네트워크에서 인증 시그널링(authentication signaling) 혼잡(congestion)과부하(overload)의 문제가 야기된다. 본 논문은 그룹 기반의 인증 프로토콜과 키 관리 프로토콜을 제안한다. 그룹 단위로 MTC 단말들을 관리하기 위해 제안하는 프로토콜은 그룹 리더(leader)를 선출하고, 리더만이 코어 망(core network)과의 인증에 참여한다. 인증이 완료된 후, 그룹 리더는 이진트리(binary tree)를 구성하여 나머지 구성원(member)들과 MME(Mobility Management Entity)를 관리한다. 마지막으로 제안 프로토콜 분석은 제안하는프로토콜이 MTC 단말들과 코어 망 사이에서 발생되는 인증 시그널링을 줄여줄 수 있을 뿐만 아니라 효율적으로MTC 단말들을 관리할 수 있음도 보여준다.
Abstract
MTC(Machine Type Communications), providing a variety of services anytime and anywhere by connecting the cellular network to the machine and things without human intervention, is being considered as a major challenge of the next-generation communications. Currently, When a massive MTC devices simultaneously connect to the network, each MTC device needs an independent access authentication process. Because of this process, authentication signaling congestion and overload problems will cause in LTE-Advanced. In this paper, we propose a group-based authentication protocol and a key management protocol. For managing the MTC devices as group units, the proposed protocol elects a group leader and authentications only once with the core network. After the authentication is completed, a group leader manages the rest members and MME(Mobility Management Entity) by constructing a binary tree. Finally, the propose protocol analysis show that the proposed protocol not only can reduces the authentication signaling which generated in between the MTC devices and the core network but also can manages the MTC devices, efficiently.
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