Device-to-device (D2D) communication has been introduced as a promising technology for the 5th generation (5G) of cellular networks. It has been defined as a connection between two user equipments (UEs) without traver...
详细信息
Device-to-device (D2D) communication has been introduced as a promising technology for the 5th generation (5G) of cellular networks. It has been defined as a connection between two user equipments (UEs) without traversing the base station. In this paper, a heterogeneous macro-femtocell network is considered with the presence of D2D UEs. It has been shown that network coding in cooperative communication can enhance the quality of service (QoS) in wireless communications. In this paper, we consider the random linear network coding (RLNC) in cooperative D2D communication, where relay nodes are selected from the set of femtocell base stations (FBSs). Since energy efficiency is an important issue in wireless communications, our aim is to select efficient relay node that maximizes the energy efficiency of network-coded D2D communication by taking the minimum data rate constraint into account. Simulation results demonstrate that RLNC achieves the better efficiency in comparison with direct D2D.
In an (H, r) combination network, a single content library is delivered to (Hr ) users through deployed H relays without cache memories, such that each user with local cache memories is simultaneously served by a diff...
详细信息
In most of the network coding problems with k messages, the existence of binary network coding solution over 2depends on the existence of adequate sets of k-dimensional binary vectors such that each set comprises of l...
详细信息
Stereoscopic image quality assessment (SIQA) has encountered non-trivial challenges due to the fast proliferation of 3D contents. In the past years, deep learning oriented SIQA methods have emerged and achieved specta...
详细信息
Shocks are a crucial probe for understanding the ongoing chemistry within ices on interstellar dust grains where many complex organic molecules (COMs) are believed to be formed. However, previous work has been limited...
详细信息
In communication systems, multi-path transmission could improve spectrum efficiency and reduce time delay markedly. In this paper, two transmission modes which employ the network coding and the data allocating jointly...
详细信息
In communication systems, multi-path transmission could improve spectrum efficiency and reduce time delay markedly. In this paper, two transmission modes which employ the network coding and the data allocating jointly are proposed for multi-path communication systems, called the data allocating and network coding (DANC) mode and network coding and data allocating (NCDA) mode. The big different is, the former allocates data to each feasible path and then does network coding, while the latter swaps the order of two operations. Corresponding optimization problem are solved with an iterative process based on traditional branch and bound algorithm. The qualitative analyses of the operation order, reasons for the performance gap and advantages of different modes are also provided. Simulation results under different conditions demonstrate that the proposed transmission methods could improve the time delay performance effectively.
We investigate network coding (NC) in access point-to-multi-point (PMP) broadcast networks. Characterized by a shared unicast upstream channel and a time-shared broadcast downstream channel, PMP networks are widely de...
详细信息
To improve the resource utilization of traditional two-way wireless relay system, an optimal power allocation (OPA) algorithm for a space-time cooperative network coding scheme employing amplify-and-forward protocol (...
详细信息
The joint considering of caching and coded multicasting can significantly improve caching gain, which has become a promising approach to address the explosive growth of wireless traffic demand. In this paper, the desi...
详细信息
ISBN:
(数字)9781728109626
ISBN:
(纸本)9781728109633
The joint considering of caching and coded multicasting can significantly improve caching gain, which has become a promising approach to address the explosive growth of wireless traffic demand. In this paper, the design of caching placement and coded multicasting for wireless backhaul networks is explored under heterogeneous file preferences, where the file preference of each small base station (BS) is assumed to be aware at the macro BS. To address the heterogeneous file preferences, a group-based caching and cooperative coded multicasting scheme is developed in this paper. By utilizing a spectral clustering method, the small BSs are first clustered into different groups with similar file preferences. Moreover, a cooperative caching strategy with symmetric file division is designed for each group, where the suboptimal caching proportion of the most popular files is achieved by an approximation analysis. By utilizing the group-based caching structure, an efficient greedy-based two-level cooperative coded multicasting algorithm is then developed. The proposed algorithm not only utilizes the coded multicasting opportunities within each group but also explores the cooperative coding opportunities among groups. The effectiveness of our proposed scheme is verified by simulation results, which show that our proposed scheme can significantly reduce the traffic load compared to the existing schemes.
Information Centric networking (ICN) is a novel future network architecture that is focusing on content distribution. Its ubiquitous caching schemes can improve network performance. In this paper, we propose a node im...
详细信息
Information Centric networking (ICN) is a novel future network architecture that is focusing on content distribution. Its ubiquitous caching schemes can improve network performance. In this paper, we propose a node importance to community based caching scheme with network coding in ICN, which is named as NICNC. For each community, content router makes cache decision depending on its node importance to community to make content cached more reasonable in temporal and spatial distribution. Moreover, by applying network coding into ICN, one coded blocks containing information of multiple chunks can satisfy multiple interests for different chunks sent by different consumers. This can significantly enhance cache diversity and cache hit rate without increasing cache capacity. Experimental results show that our scheme can improve the network performance at many aspects, such as average download time, cache hit rate, and instantaneous hop reduction rate.
暂无评论