Title :
QoS and protection of relay nodes in 4G wireless networks using network coding
Author :
Rengaraju, Perumalraja ; Chung-Horng Lung ; Srinivasan, A.
Author_Institution :
Dept. of Syst. & Comput. Eng., Carleton Univ., Ottawa, ON, Canada
Abstract :
This paper addresses the Quality of Service (QoS) degradation problem of wireless relay node failures in multihop Worldwide interoperable Microwave Access (WiMAX) and Long Term Evolution (LTE) networks. In general, node protection in a communication network increases the reliability of the traffic flow from source to destination. For wireless networks, implementing the traditional 1+1 protection scheme increases the capital cost, as resources cannot be fully utilized. On the other hand, the design and implementation of the 1:N protection scheme in wireless networks for greater value of N (> 2) is very difficult, due to wireless network coverage and the physical layer design. To overcome the above drawbacks, a technique based on network coding is proposed for node protection in multihop wireless networks. In multihop wireless networks, few research efforts are concentrated on node protection schemes using network coding. Moreover, to best of our knowledge, no reports have been published on measuring the QoS performance for node protection in 4G wireless networks using network coding. In this paper, we first describe the node protection scheme using XOR network coding for multihop 4G wireless networks. Then, we measure the QoS performance, such as packet delivery ratio (PDR), latency and jitter, for different scenarios. The scenarios include a failure of a single relay node and failures of two relay nodes with and without our protection scheme and user´s mobility. The simulation results show that the QoS performance with protection against a single relay node failure and failures of two relay nodes are very close to that of no failure scenario, while the network reliability increases due to the protection mechanism. Also, we report a decoding problem in multihop wireless networks using XOR network coding.
Keywords :
4G mobile communication; Long Term Evolution; WiMax; decoding; failure analysis; network coding; quality of service; relay networks (telecommunication); telecommunication network reliability; telecommunication traffic; 1+1 protection scheme; 1:N protection scheme; LTE networks; Long Term Evolution network; PDR; QoS; WiMAX; XOR network coding; capital cost; decoding problem; multihop 4G wireless networks; multihop worldwide interoperable microwave access; packet delivery ratio; physical layer design; quality of service degradation problem; relay node protection scheme; single relay node failure; telecommunication network reliability; traffic flow reliability; wireless communication network; wireless relay node failures; Educational institutions; Encoding; Fluid flow measurement; Quality of service; Reliability; Spread spectrum communication; Wireless networks; Network coding; QoS; multihop WiMAX and multihop LTE; relay node protection;
Conference_Titel :
Wireless Communications and Mobile Computing Conference (IWCMC), 2013 9th International
Conference_Location :
Sardinia
Print_ISBN :
978-1-4673-2479-3
DOI :
10.1109/IWCMC.2013.6583573