Cross-Layer Backpressure to Improve HSDPA Performance

Author

Bajzik, Lajos ; Korossy, Laszlo ; Veijalainen, Kari ; Vulkan, Csaba

Author_Institution

Nokia Res. Center, Budapest

fYear

2006

fDate

11-14 Sept. 2006

Firstpage

1

Lastpage

5

Abstract

High speed downlink packet access (HSDPA) is providing increased user data rate by introducing additional functionalities at the Node B. To achieve optimal radio resource utilization HSDPA flow control is applied to control the amount of data sent from the radio network controller (RNC) to the Node B over the Iub transport network. HSDPA flow control is not taking into account the available transport resources which can lead to situations when HSDPA packets are dropped due to congestion. These drops are triggering Radio link control (RLC) protocol retransmissions that are decreasing the HSDPA performance. We propose a cross-layer backpressure in the RNC to prevent HSDPA packet drops at the transport; we consider the impact of this enhancement on the system performance and evaluate it with NS2 simulations

Keywords

3G mobile communication; code division multiple access; radio links; telecommunication congestion control; transport protocols; HSDPA flow control; Iub transport network; cross-layer backpressure; high speed downlink packet access; radio link control protocol; radio network controller; radio resource utilization; 3G mobile communication; Access protocols; Automatic repeat request; Communication system control; Downlink; Multiaccess communication; Optimal control; Radio control; Resource management; System performance;

fLanguage

English

Publisher

ieee

Conference_Titel

Personal, Indoor and Mobile Radio Communications, 2006 IEEE 17th International Symposium on

Conference_Location

Helsinki

Print_ISBN

1-4244-0329-4

Electronic_ISBN

1-4244-0330-8

Type

conf

DOI

10.1109/PIMRC.2006.254115

Filename

4022309