Compared to asynchronous contention-based random access, e.g., carrier sensing multiple access, synchronous and distributed link scheduling for orthogonal frequency-division multiplexing (OFDM) systems is a viable solution to improve system throughput for device-to-device (D2D) ad hoc network. In particular, spatial spectral efficiency can be improved by scheduling as many concurrent D2D links necessary to satisfy individual signal-to-interference ratio (SIR) requirements. In this paper, we propose an adaptive yielding mechanism that can further improve the spatial spectral efficiency by allowing for more concurrent D2D links whenever more interference can be accepted, e.g., when the instantaneous bandwidth efficiency requirement is less than the current link capacity. Even if the system throughput varies with the link density, it is shown that the average system throughput can be significantly improved by the proposed yielding mechanism.
Bibliographical noteFunding Information:
This work was supported in part by Communications Research Team, DMC R&D Center, Samsung Electronics Co., Ltd. and also in part of the project titled Research on Fundamental Core Technology for Ubiquitous Shipping and Logistics funded by the Ministry of Oceans and Fisheries, Korea.
© 2014, Kang et al.; licensee Springer.
ASJC Scopus subject areas
- Metals and Alloys