Title :
WLAN MAC Layer Prediction/Collision Avoidance Mechanism Based on Service Attribute and Cross-Layer Control
Author :
Zeng, Gui-gen ; Wu, Shuang ; Zheng, Bao-yu
Author_Institution :
Nanjing Univ. of Posts & Telecommun., Nanjing, China
Abstract :
In VoIP over WLAN (known as VoWLAN) transmission, one of the main problems is that the supported voice channel capacity is relatively low. As an improvement to IEEE 802.11 MAC layer Carrier Sense Multi-Access/Collision Avoidance (CSMA/CA) algorithm, this paper presents Prediction/Collision Avoidance (P/CA) mechanism based on service attribute and cross-layer control. Under this mechanism, there is no collision and ACK confirmation frame could be removed. Simulation results show that compared with CSMA/CA, the proposed P/CA mechanism based on cross-layer control design can remarkably improve the channel capacity performance in VoWLAN transmission.
Keywords :
Internet telephony; access protocols; channel capacity; telecommunication congestion control; wireless LAN; ACK; CSMA/CA; WLAN MAC; carrier sense multiaccess/collision avoidance algorithm; channel capacity; collision avoidance; cross-layer control; cross-layer control design; layer prediction; prediction/collision avoidance; service attribute; voice channel capacity; Algorithm design and analysis; Collision avoidance; Delay; IEEE 802.11 Standards; Multiaccess communication; Quality of service; Wireless LAN;
Conference_Titel :
Wireless Communications Networking and Mobile Computing (WiCOM), 2010 6th International Conference on
Conference_Location :
Chengdu
Print_ISBN :
978-1-4244-3708-5
Electronic_ISBN :
978-1-4244-3709-2
DOI :
10.1109/WICOM.2010.5601083
