1、外文资料原 High-Speed Packet Access Evolution in 3GPP Release 7 ABSTRACT High-speed packet access (HSPA) was included in Third Generation Partnership Project(3GPP) releases 5 and 6 for downlink and for uplink. The 3GPP release 7 offers a number of HSPA enhancements, providing major improvements to the en
2、d-user performance and to net-work efficiency. The release 7 features are introduced in this paper. Release 7 also is known as HSPA evolution or HSPA+. The HSPA+ downlink peak bit rate can be increased to 28.8 Mbps with a multiple input multiple output (MIMO) antenna solution, and the uplink rate ca
3、n be increased to 11.5 Mbps with higher order modulation in release 7. The higher peak rates are facilitated by the layer 2 optimization in downlink. In addition, the terminal power consumption can be reduced considerably for packet applications. The downlink cell capacity will be enhanced with new
4、types of terminal requirements for a two-antenna equalizer and with MIMO. Altogether, release 7 features nearly double the cell capacity compared to release 6 with emphasis on the capacity of voice-over-IP (V oIP) service. 3GPP release 7 enables the simplification of the network architecture. The number of net-work elements for the user plane can be reduced from four in release 6 to two in release 7. The HSPA flat architecture in release 7 is similar to the architecture agreed upon for 3GPP long
