Uplink VoIP capacity of 3GPP LTE under power control and semi-persistent scheduling

Publikationstyp
Conference Paper
Date Issued
2013
Sprache
English
Author(s)
Mühleisen, Maciej  
Walke, Bernhard  
Timm-Giel, Andreas  orcid-logo
Institut
Kommunikationsnetze E-4  
TORE-URI
http://hdl.handle.net/11420/7522
Start Page
69
End Page
76
Article Number
6705359
Citation
Australasian Telecommunication Networks and Applications Conference (ATNAC 2013)
Contribution to Conference
2013 Australasian Telecommunication Networks and Applications Conference, ATNAC 2013  
Publisher DOI
10.1109/ATNAC.2013.6705359
Scopus ID
2-s2.0-84893548388
Publisher
IEEE
LTE-Advanced (LTE-A) standardized as Release 10 by the 3rd Generation Partnership Project (3GPP) is a packet-based 4G mobile radio system. Of specific interest is its capability to support a large number of voice calls through Voice over IP (VoIP) calls. Radio resource management for VoIP calls is challenging. Control channel limitations prevent the dynamic scheduling of every VoIP packet in each 1 ms subframe. Semi-persistent VoIP scheduling enables channel quality aware scheduling reducing load to control channels, substantially. We describe and evaluate by system level simulation a semipersistent VoIP schedulers for LTE. In addition, contributions to VoIP system capacity of power control, as applied in Soft Frequency Reuse (SFR), are evaluated. It turns out that system capacity is reduced if SFR is applied in the uplink. This unexpected result is found to be caused by performance degradation of the weakest users under SFR, limiting overall system capacity. © 2013 IEEE.
DDC Class
600: Technik
620: Ingenieurwissenschaften