Highspeed Packet Access (HSPA)

HSPA has been designed to enhance the data packet traffic transmission on both uplink and downlink. It is an evolution of the existing 3 Generation Partnership Project (3GPP) Wideband Code Division Multiple Access (WCDMA) Release 99 (R99) standard. Furthermore, it increases throughput and capacity. With HSPA the delay of the system could be reduced and higher instantaneous per user data rates are possible. Both High Speed Downlink Packet Access (HSDPA) and High Speed Uplink Packet Access (HSUPA) use Hybrid Automatic Repeat Request (H-ARQ) for recovering erroneous packets. In addition, the scheduler was moved from the Radio Network Controller (RNC) to the Node B to achieve a faster scheduling and a shorter Transmission Time Interval (TTI) of 2ms is used. The Soft Handover (SHO) is only supported in HSUPA. In HSPDA the Adaptive Modulation and Coding (AMC) is applied to adapt the modulation rank and coding rate to the radio channel condition of each user. (Zaki, Weerawardane, Li, Timm-Giel & Malafronte 2008.)

[1]  Wang Min,et al.  Evaluation and Analysis of SIP and VOIP Performance with Presence Traffic over HSPA , 2007, 2007 IEEE 18th International Symposium on Personal, Indoor and Mobile Radio Communications.

[2]  Tracy Fulghum,et al.  High Speed Packet Access Evolution - Concept and Technologies , 2007, 2007 IEEE 65th Vehicular Technology Conference - VTC2007-Spring.

[3]  Wenbo Wang,et al.  System-level evaluation of MIMO performance in TD-HSPA+ system , 2009, 2009 IEEE International Conference on Communications Technology and Applications.

[4]  Esa Malkamäki,et al.  VOIP over HSPA with 3GPP Release 7 , 2006, 2006 IEEE 17th International Symposium on Personal, Indoor and Mobile Radio Communications.

[5]  Pablo Jose Ameigeiras Gutiérrez,et al.  Packet Scheduling and Quality of Service in HSDPA , 2003 .

[6]  A. Timm-Giel,et al.  Effect of the RLC and TNL congestion control on the HSUPA network performance , 2008, 2008 Mosharaka International Conference on Communications, Computers and Applications.

[7]  Stefan Wänstedt,et al.  Realization and Performance Evaluation of IMS Multimedia Telephony for HSPA , 2006, 2006 IEEE 17th International Symposium on Personal, Indoor and Mobile Radio Communications.