Dynamic downlink and uplink subframe boundary adjustment for capacity improvement and QoS support in mobile WiMAX

Author

Nguyen, Tri M. ; Yim, Taihyong ; Kim, Youngjun ; Hong, Kiwon ; Li, Chunying ; Park, Jinwoo

Author_Institution

Sch. of Electr. Eng., Korea Univ., Seoul, South Korea

fYear

2012

fDate

1-3 Aug. 2012

Firstpage

141

Lastpage

144

Abstract

Mobile WiMAX is a promising broadband access technology providing wireless last mile connectivity. In the Time Division Duplex (TDD) mode, a WiMAX frame is divided into two parts: downlink and uplink subframes. The subframe division ratio is normally set to a fixed value, resulting in under-utilization of the downlink or uplink subframes. In this paper, we propose a dynamic downlink and uplink subframe boundary adjustment scheme in which the downlink and uplink subframe ratio is dynamically adjusted upon the usage statistics. It consequently improves the frame utilization efficiency, system capacity as well as QoS support.

Keywords

WiMax; broadband networks; mobile radio; quality of service; QoS support; TDD mode; WiMAX frame; broadband access technology; capacity improvement; dynamic downlink subframe boundary adjustment; mobile WiMAX; time division duplex; uplink subframe boundary adjustment; Bandwidth; Downlink; IEEE 802.16 Standards; Mobile communication; Quality of service; WiMAX; 802.16; OFDMA; Packet scheduling; QoS; TDD; WiMAX;

fLanguage

English

Publisher

ieee

Conference_Titel

Communications and Electronics (ICCE), 2012 Fourth International Conference on

Conference_Location

Hue

Print_ISBN

978-1-4673-2492-2

Type

conf

DOI

10.1109/CCE.2012.6315886

Filename

6315886