Universal Mobile Telecommunications System (UMTS) Long Term Evolution (LTE) Release 8 provides high peak data rates of 300 Mb/s on the downlink and 75 Mb/s on the uplink for a 20 MHz bandwidth, and allows flexible bandwidth operation of up to 20 MHz. Currently, enhancements are being studied to provide substantial improvements to LTE Release 8, allowing it to meet or exceed International Mobile Telecommunications- Advanced (IMT-A) requirements . these enhancements are being considered as part of LTE-Advanced (LTE-A, also known as LTE Release 10), which includes carrier aggregation, advanced uplink (UL) and downlink (DL) spatial multiplexing, DL coordinated multipoint (CoMP) transmission, and heterogeneous networks with special emphasis on Type 1 and Type 2 relays.