The Degrees-of-Freedom of Multi-way Device-to-Device Communications is Limited by 2


A. Chaaban, H. Maier, A. Sezgin,


        A 3-user device-to-device (D2D) communications scenario is studied where each user wants to send and receive a message from each other user. This scenario resembles a 3-way communication channel. The capacity of this channel is unknown in general. In this paper, a sum-capacity upper bound that characterizes the degrees of-freedom of the channel is derived by using genie-aided arguments. It is further shown that the derived upper bound is achievable within a gap of 2 bits, thus leading to an approximate sum-capacity characterization for the 3-way channel. As a by-product, interesting analogies between multi-way communications and multi-way relay communications are concluded.

BibTEX Reference Entry 

	author = {Anas Chaaban and Henning Maier and Aydin Sezgin},
	title = "The Degrees-of-Freedom of Multi-way Device-to-Device Communications is Limited by 2",
	pages = "361-365",
	booktitle = "{IEEE} International Symposium on Information Theory (ISIT 2014)",
	address = {Honolulu, USA},
	doi = 10.1109/ISIT.2014.6874855,
	month = Jul,
	year = 2014,
	hsb = hsb999910356423,


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