Abstract--The advancement and migration of the
broadband wireless communication technology into
the next generation technology known as Fourth
Generation (4G) network has indeed become the next
emergent wireless revolution, as an important
milestone beyond third generation. Long-Term
Evolution (LTE) and Worldwide Interoperability for
Microwave Access (Wimax) are among the numerous
new innovation technologies which have evolved as
leading contenders for the 4G technology. The high
speed capability and wider coverage has been a good
achievement for 4G networks. Nevertheless, security
and improved higher speed with a better quality of
service (QOS) has been an issue in its network
operations due to the open nature and all IP
infrastructure of 4G network. This paper explores the
trends in the evolution of 4G wireless technology and
its security limitations. It studies the wireless
standards of 4G technologies. Also, the security
related architecture for the LTE and Wimax
technologies are analysed. Finally, it evaluates and
recommends ways of tackling the security issues in
4G network.