LTE-advanced: next-generation wireless broadband technology [Invited Paper]

摘要: LTE Release 8 is one of the primary broadband technologies based on OFDM, which currently being commercialized. 8, mainly deployed in a macro/microcell layout, provides improved system capacity and coverage, high peak data rates, low latency, reduced operating costs, multi-antenna support, flexible bandwidth operation seamless integration with existing systems. LTE-Advanced (also known as 10) significantly enhances supports much higher throughput lower latencies, resulting better user experience. Additionally, 10 will support heterogeneous deployments where low-power nodes comprising picocells, femtocells, relays, remote radio heads, so are placed macrocell layout. The features enable to meet or exceed IMT-Advanced requirements. It may also be noted that 9 some minor enhancement respect air interface, includes like dual-layer beamforming time-difference- of-arrival-based location techniques. In this article an overview techniques considered for (aka LTEAdvanced) discussed. This extension via carrier aggregation deployment bandwidths up 100 MHz, downlink spatial multiplexing including single-cell multi-user multiple-input multiple-output transmission coordinated multi point transmission, uplink four-layer MIMO, networks emphasis Type 1 2 relays. Finally, performance LTEAdvanced using IMT-A scenarios presented compared against targets full buffer bursty traffic model.