Full Uplink Performance Evaluation of FDD/TDD LTE-Advanced Networks with Type-1 Relays

Abstract

Long Term Evolution-Advanced (LTE-A) networks are termed as the 4G cellular systems. There are many novel techniques used in LTE-A systems to fulfill the target of 4G requirements such as Relay Node (RN), Carrier Aggregation (CA) and so on. Relay has been taken as a promising key technique in the LTE-A network to meet its demanding requirement which could enhance the coverage and increase the data rates in a cost efficient manner. In 3GPP Release 10, Type-1 relay was agreed as a work item (WI). According to 3GPP's definition, Type-1 relay works in half-duplex way and in in-band mode. So the backhaul link and access link work in the same band, but they are time multiplexed. If there are multiple relays in each cell, the backhaul sub-frames allocated for backhaul link can be the same or different in different relays. In this paper, the uplink performance evaluation of the relays with different backhaul sub-frames in FDD and TDD LTE-A networks is carried out by doing the system-level simulation according to the 3GPP Case 1 and Case 3. Some suggestions for the relay deployment are also recommended.