Two-Way Interference Channel Capacity: How to Have the Cake and Eat It Too

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Two-way communication is prevalent and its fundamental limits are first studied in the point-to-point setting by Shannon. One natural extension is a two-way interference channel (IC) with four independent messages: two associated with each direction of communication. In this paper, we explore a deterministic two-way IC, which captures the key properties of the wireless Gaussian channel. Our main contribution lies in the complete capacity region characterization of the two-way IC (with respect to the forward and backward sum-rate pair) via a new achievable scheme and a new converse. One surprising consequence of this result is that not only we can get an interaction gain over the one-way non-feedback capacities, we can sometimes get all the way to perfect feedback capacities in both directions simultaneously. In addition, our novel outer bound characterizes channel regimes in which interaction has no bearing on capacity.
Publisher
IEEE-INST ELECTRICAL ELECTRONICS ENGINEERS INC
Issue Date
2018-06
Language
English
Article Type
Article
Keywords

NETWORK INFORMATION-FLOW; FUNCTION COMPUTATION; FEEDBACK; COOPERATION; ALIGNMENT; REGION

Citation

IEEE TRANSACTIONS ON INFORMATION THEORY, v.64, no.6, pp.4259 - 4281

ISSN
0018-9448
DOI
10.1109/TIT.2018.2818117
URI
http://hdl.handle.net/10203/242524
Appears in Collection
EE-Journal Papers(저널논문)
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