干擾感知以圖為基礎的資源分配用於裝置對裝置廣播通訊

Abstract

4G 無線系統為了提供行動寬頻服務發展進階長期演進技術(LTEA) 。裝置對裝置通訊系統(D2D) 是個能夠提供點對點通訊服務的前景 科技，其增進了資源的使用，以及頻譜的使用效率。在這篇文章裡， 我們提出了一個集中式的資源分配方式於裝置對裝置通訊系統之下。 大部份的干擾源自於不同裝置對裝置廣播使用者之間共用同樣的資源， 這會嚴重的影響其他的使用者。因此，需要一個有效率的方法來進行 資源分配以協調干擾。特別的是，我們將不同的裝置對裝置廣播團體 形成一個新穎的干擾感知的圖。我們提出了一個集中式干擾感知的資 源分配用於裝置對裝置廣播通訊，其可以有效的減少在不同團體之間 受到干擾的裝置對裝置通訊使用者。這方法的目標是希望能夠增進系 統的吞吐量且消除不同裝置對裝置團體之間的干擾。此外，根據修改 集中式的方法，我們也提出了分散式的方法。

The Long Term Evolution-Advanced (LTE-A) networks are being developed to provide mobile broadband services for the fourth generation (4G) cellular wireless systems. Device-to-Device (D2D) communications is a promising technique to provide wireless peer-to-peer communication services and enhance resource utilization, as well as spectrum efficiency. In this thesis, a centralized resource allocation scheme involving several Device-to-Device (D2D) broadcast groups underlaying cellular network is proposed. The great amount of interference caused by sharing the resources between different D2D broadcast users may significantly affect the performances of other D2D users. Therefore, an efficient resource allocation method is necessary to coordinate the interference. Specifically, we formulate the interference relationships among different D2D broadcast groups as an innovative interferenceaware graph. We propose a centralized interference-aware graph based resource allocation algorithm that can effectively minimize the interfered D2D users between different D2D broadcast groups. This scheme aims to optimize the throughput of D2D communications over the shared uplink spectrum meanwhile mitigate different D2D broadcast groups from affecting the performances of each other. Moreover,a distributed algorithm is proposed based on some modifications of the centralized one.