Title :
A Novel MCS Selection Criterion for VOIP in LTE
Author :
Ding, Lu ; Tong, Fei ; Chen, Zhen ; Liu, Zhimin
Author_Institution :
Sch. of Electron. Eng. & Comput. Sci., Peking Univ., Beijing, China
Abstract :
This paper presents a novel modulation and coding scheme (MCS) selection method to optimize the performance of Voice over Internet Protocol (VoIP) semi-persistent scheduling in Long Term Evolution (LTE) downlink. In VoIP traffic, the packet length little changes during a certain period and the cost of resource for the packet is related to this length. We exploit the characteristics and propose to select a more reliable MCS with the same amount of resource to be allocated. This method can reduce the block error ratio (BLER) at the same time satisfy VoIP Quality-of-Service (QoS) requirements. Through system level simulations, the proposed MCS selection criterion is proved to yield nearly 15% capacity gain in LTE VoIP system compared with the conventional method.
Keywords :
Internet telephony; Long Term Evolution; modulation coding; quality of service; resource allocation; scheduling; telecommunication traffic; LTE VoIP system; Long Term Evolution; MCS selection criterion; QoS; VoIP traffic; block error ratio; modulation and coding scheme selection method; quality-of-service; resource allocation; semipersistent scheduling; system level simulations; voice over Internet protocol; Delay; Downlink; Dynamic scheduling; Educational institutions; Indexes; Signal to noise ratio;
Conference_Titel :
Wireless Communications, Networking and Mobile Computing (WiCOM), 2011 7th International Conference on
Conference_Location :
Wuhan
Print_ISBN :
978-1-4244-6250-6
DOI :
10.1109/wicom.2011.6036685
