Long Term Evolution (LTE) network standard defines requirements to guarantee Quality of Service (QoS) for diverse applications such as VoIP, video and web browsing according to the Third Generation Partnership Project (3GPP) specifications. The Radio Resource Management (RRM) techniques such as Call Admission Control Schemes play an important role in providing such guarantees. Consequently, several schemes have been proposed to manage resources while ensuring QoS to wireless applications. This paper presents a survey of Call Admission Control (CAC) Schemes. These algorithms are classified into CAC with Pre-emption, Resource Reservation (RR), Resource Degradation (RD), Delay Awareness (DA) or Channel Awareness (CA). The operational procedure, strengths and weaknesses of each scheme are discussed. The comparative analysis of these schemes is also presented. The analysis provides an insight on open research issues for future research.