Abstract
Device-to-device (D2D) communication technology is widely acknowledged as an emerging candidate to alleviate the wireless traffic explosion problem for the next generation wireless local area network (WLAN) IEEE 802.11ax. In this paper, we integrate D2D communication into IEEE 802.11ax for maximizing the spectrum efficiency. Due to the spectrum scarcity, the number of available resource units (RUs) is typically less than D2D pairs and stations (STAs), which makes the management of spectrum resources more complex. To tackle this issue, we design an efficient resource management algorithm for uplink random access and resource allocation in D2D-enabled 802.11ax, which provides more channel access and resource reuse opportunities for STAs and D2D pairs. Specifically, we propose an enhanced back-off mechanism and derive the optimal contention window (CW) by a theoretical model, which improves the uplink random access efficiency. To tackle the complex interference problem in RU scheduling phase, we develop an efficient and low-complexity resource allocation algorithm based on the maximal independent set (MIS), which can schedule multiple D2D pairs to share the same RU with the specific STA. Simulation results demonstrate that the proposed algorithm significantly improves the network performance in terms of system throughput, collision rate, complete time, and channel utilization.
Highlights
Wireless local area networks (WLANs) have been widely deployed in residential, commercial, and public areas to provide the near-ubiquitous wireless coverage
The main contributions of this paper are summarized as follows: (i) We integrate the D2D communication technology into 802.11ax and develop a spectrum efficiency optimization solution for random access and resource allocation in D2D-enabled 802.11ax network (ii) We propose an enhanced back-off mechanism in frequency and time domains, where the optimal contention window (CW) is derived by a theoretical model for maximizing the uplink random access efficiency
The proposed algorithm reduces the control overheads and the data collisions significantly by canceling the ACK frame and offloading nodes into the D2D communication mode in the uplink random access phase, respectively (iii) We propose an efficient resource allocation algorithm based on the maximal independent set (MIS), where AP can schedule multiple D2D pairs to share the same resource units (RUs) with the specific STA, simultaneously, which significantly improves the spectrum efficiency
Summary
Wireless local area networks (WLANs) have been widely deployed in residential, commercial, and public areas to provide the near-ubiquitous wireless coverage. The resource allocation algorithm for multiple D2D pairs and RU scenario is rarely considered in most existing works due to high computational complexity or overheads Motivated by these advantages and challenges, this paper integrates D2D technology into 802.11ax and proposes an efficient channel access and resource allocation algorithm for improving the spectrum efficiency. The proposed algorithm reduces the control overheads and the data collisions significantly by canceling the ACK frame and offloading nodes into the D2D communication mode in the uplink random access phase, respectively (iii) We propose an efficient resource allocation algorithm based on the MISs, where AP can schedule multiple D2D pairs to share the same RU with the specific STA, simultaneously, which significantly improves the spectrum efficiency.
Sign-in/Register to view highlights & summary Sign-in/Register to access full text options 
Free) 
Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
Schedule a call
