全雙工系統下策略防範資源分配機制設計

Abstract

由於使用者需求的增加，如何增進頻譜使用效率是次世代行動網路一個很重要的課題。在傳統的無線通訊系統中，上行和下行的使用者必須使用不同的無線資源來傳輸。而在全雙工技術下，上行和下行傳輸可以使用同一個無線資源，進而增進了蜂巢式網路的頻譜使用效率。然而，使用全雙工系統會產生自我干擾和內部節點干擾的問題。為了減少上述的干擾，使用者需要回報其對於干擾的測量值，讓基地台可以有效的分配資源以及配對上下行使用者。但由於對使用者來說，干擾的量測值為其私人訊息，使用者可能不會回報真實的干擾量測值且可能會藉此增進自己的利益。 在這篇論文中，我們提出了在全雙工系統下，確保誠實回報的資源分配方法。我們根據拍賣理論和配對理論所提出的方法，能確保使用者會誠實回報他們的通道品質和利益，從而確保回以資訊的正確性，以及確保資源分配的效率。此外，所提出的方法能透過理論證明其穩定性以及柏拉圖效率。模擬結果證實了我們所提出的方法，比一般不能確保誠實回報的集中式分配方法，多出了11% 的效能。

Improving spectral efficiency is a critical task for next-generation cellular systems to cope with the growing demand of users. In a traditional wireless communication system, the uplink and downlink users can only communicate with the base station on different resource blocks. The efficiency of such transmission can be improved by using full-duplex techniques at the BS, with the UL and DL transmissions performed simultaneously on the same radio resource. However, it causes self-interference and inter-node interference. To minimize self-interference and inter-node interference, users have to feed back their measurements of interference to allow the base station to effectively allocate resources and form transmission pairs. Considering that the interference measurements are private information, users may not report the true values and may try to gain their own benefits. In this dissertation, we propose a strategy-proof resource allocation mechanism for full-duplex cellular networks. The proposed scheme is based on auction and matching theories. It guarantees that users report true values of their channel quality and utilities, and therefore guarantees the correctness of feedback information and the efficiency of resource allocation. Moreover, the proposed matching-based mechanism is theoretically proved to be stable and Pareto efficient. Simulation results confirm that, compared to a centralized scheme with non-truthful information from users, the proposed scheme can achieve an 11% gain.