基于逆向拍卖的D2D边缘缓存网络编码内容定价与交易机制  

A pricing and trading mechanism of D2D coded content sharing based on reverse auction

作　　者：殷俊 凌仙 YIN Jun;LING Xian(School of Internet of Things,Nanjing University of Posts and Telecommunications,Nanjing 210003,China)

机构地区：[1]南京邮电大学物联网学院,江苏南京210003

出　　处：《南京邮电大学学报（自然科学版）》2023年第3期19-27,共9页Journal of Nanjing University of Posts and Telecommunications：Natural Science Edition

基　　金：国防基础科研计划(JCKY201760**003,JCKY201860**001);南邮创新基金(NY221095);江苏省研究生科研与实践创新计划(KYCX21_0801)资助项目。

摘　　要：在D2D边缘缓存网络中引入网络编码技术具有缓存利用率高、数据块调度过程简单及系统鲁棒性高等优点。但是,由于对编码块分享所带来的设备能量消耗等顾虑,用户倾向于只从网络获取内容而进行内容分享,这种自私行为直接影响了系统的总体性能。针对该问题,提出了一种基于逆向拍卖的D2D编码网络内容分享激励机制——RACON。RACON以实现网络内容分享总效用最大化为目标,将内容请求者视作拍卖过程的买家,而将买家周围的潜在内容提供者视为拍卖过程的卖家;买、卖方的内容叫价过程可综合考虑其自身电量资源、用户之间传输距离以及传输内容的供需关系等影响因素;拍卖结果允许多个卖家中标,并采用虚拟代币结算,从而激励用户间相互分享缓存内容。理论分析证明RACON机制符合双边激励相容性、个人理性约束、物质及弱预算平衡特征,可有效约束买、卖方拍卖行为。仿真实验进一步表明,RACON机制能够有效地激励网络内用户间编码内容分享过程,最大化边缘缓存网络效用。The introduction of network coding techniques in D2D edge caching networks can obtain the advantages of high cache utilization,simple data block scheduling process,and high system robustness.However,due to the concerns of the device energy consumption caused by coded block sharing,users tend to only share contents acquired from the network.This selfish behavior directly affects the overall performance of the system.To address this problem,we propose a reverse auction⁃based incentive mechanism for content sharing in D2D encoding networks,RACON.To maximize the total utility of network content sharing,RACON treats content requesters as buyers in the auction process,and potential content providers around buyers as sellers in the auction process.The auction results allow multiple sellers to win the bids and use virtual tokens for payment,and the content calling process of the buyers,as well as the sellers,can consider their respect power resources,transmission distance between users and the supply and demand of the transmitted content,and other influencing factors.These can motivate users to share cached contents with each other.The theoretical analysis proves that the RACON mechanism is consistent with bilateral incentive compatibility,individual rational constraints,material and weak budget balance characteristics,and can effectively constrain user transaction behavior.Simulation experiments further show that the RACON mechanism can effectively incentivize the coded content sharing process among users within the network and maximize the edge caching network utility.

关 键 词：D2D边缘缓存网络 网络编码 定价与交易机制 逆向拍卖 

分 类 号：TN929.5[电子电信—通信与信息系统]