Efficient Multi-Point Transmission Scheme for HSDPA Networks

To meet the increasing demand for mobile broadband, multiple carrier features were subsequently introduced into UMTS Release-8 to Release-10. As a consequence, the UE capabilities of rejecting inter-stream interference have increased considerably. To fully utilize the UE capabilities and wireless resources, multi-point transmissions raised concerns in 3GPP High Speed Downlink Packet Access (HSDPA) standardizing process. Multi-point transmission is a promising technique to increase both the average cell throughput and cell edge user throughput. A novel cooperative sector selection algorithm, which takes both channel condition and sector loading into consideration, and an adaptive precoding transmission scheme are proposed for HSPA multi-point transmission. Through the system level simulation, the proposed transmission scheme effectively outperforms the non-cooperative system and non-adaptive cooperative scheme on both the average sector throughput and sector-edge UEs' rates significantly.