Separate Interference Channel with Partially Cooperating Decoders

摘要

近年，様々なマルチユーザ通信路において，符号器や復号器の協調通信が議論されている．本論文では，Separate型干渉通信路における通信路容量域について議論する．まず，各復号器への共通メッセージと復号器間で一方向の協調が許容される場合に対し，一般的な達成可能領域を導出する．協調リンクの容量が十分に大きいとき，導いた達成可能領域は通信路容量域となる．また，双方向の復号器の協調が許容される場合に対し，片方の協調リンクの容量が十分に大ければ，同様の議論により通信路容量域が導けることを示す．%A class of interference channels, known as the separate interference channel, is considered. Motivated by recent development of multi-terminal channels with cooperating nodes (encoders and decoders), a general achievable rate region for this channel with common information and uni-directionally cooperating decoders is derived. For a setting in which the capacity of conference links between decoders are sufficiently large, the derived achievable rate region reduces to the capacity region. Based on this result, the capacity region with common information and bi-directionally cooperating decoders is also derived.