Packet Size Optimization for Goodput Enhancement of Multi-Rate Wireless Networks

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By Michael Hempel Tue, 01/30/2018 - 11:00

Publication Type:

Conference Paper

Authors:

Wu, Dalei; Ci, S.; Sharif, Hamid; Yang Yang

Source:

Wireless Communications and Networking Conference, 2007.WCNC 2007. IEEE (2007)

Keywords:

access protocols, adaptive modulation, adaptive modulation and coding, automatic repeat request, data link layer, goodput enhancement, hybrid automatic repeat request, link adaptation architecture, link adaptation scheme, MAC layer, medium access control layer, multirate wireless networks, packet radio networks, packet size optimization, QoS, quality of service, radio access networks, radio links

Abstract:

In this paper, we propose a link adaptation scheme to adapt the packet size as a crucial system parameter for quality of service (QoS) provisioning in multi-rate wireless networks. The link adaptation scheme combines adaptive modulation and coding (AMC) at the physical layer with type-II hybrid automatic repeat request (HARQ) at the data link layer in a cross-layer fashion. We then study the goodput performance of the proposed link adaptation scheme at the medium access control (MAC) layer. We show that there exists an optimal packet size to achieve the maximum goodput in transmitting messages over transport layer sessions. Based on this observation, we provide an efficient and effective algorithm to search the optimal packet size. Finally, we propose a link adaptation architecture, through which the proposed link adaptation scheme can adapt packet sizes to instantaneous channel conditions to fulfill committed QoS in higher layers. Numerical results show that the system adopting the proposed optimal packet sizes has superior goodput performance over the systems using fixed packet sizes.