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At the edge of the network with cache servers, researchers usually focused on how to cache the contents or how to deliver cached contents from edge network to user equipment (UE). In this paper, we study the content delivery scheme in ultra-dense network (UDN) scenario. Since small cells (SCs) are densely and largely deployed in UDNs, it is hard to operate the SCs with a central unit. Thus, our delivery...
Established a wireless sensor networks and a concrete plan is brought forward based On ZigBee technology. Corrected the time of network by Time Protocol. The hardware and software of the system is designed. Finally, the application effects of the system are analyzed and compared. The System realized the goals such as low cost, low consumption, high stability, high flexibility and expansibility. The...
Vehicular ad hoc networks (VANETs) have become a promising application of mobile ad-hoc networks (MANETs). Since an inaccurate traffic warning message will impact drivers' decisions, and misguide drivers' behavior, one of the main challenges in VANETs is to forward messages in such a way that the information content can be trusted by receiving nodes. In this paper, we proposed a reputation management...
Emerging electronic commerce becomes popular together with the considerable increase of mobile device. Since mobile payments will become one of the most important mobile services. However, most people do not have a fancy for remote mobile payment, or only is limited to micro-payment. The most important problem they worry about is the security of the mobile devices and the applications along with the...
Although some reputation schemes have been proposed for ad hoc networks, they are still not the most suitable for WMNs due to the special infrastructure and communication mode in WMNs. In this paper, a hierarchical reputation management framework for WMNs is presented. We show how to collect and query reputation values in an accurate, secure and efficient manner. The correlation validation algorithm...
The WWAN/WLAN two-hop-relay system integrates two types of wireless technologies to improve wireless access throughput and coverage. However, it is unreasonable to assume that all nodes are selfless and willing to relay for other users without an incentive. In this paper, a reputation management framework for Hybrid Wireless Relay Networks is presented. Based on this framework, we show how to collect...
Remote smart card authentication and authenticated key agreement protocol for multi-servers are proposed in the paper. In the scheme the system does not need to maintain any password table, and the user who has registered in the servers does not need to remember different login passwords for various servers. Also it allows the user to choose login passwords freely. Furthermore, the proposed protocol...
Selecting an appropriate peer from the discovered file holders is one of the key steps in wireless peer-to-peer (P2P) file sharing systems. Most of existing peer selection schemes are based on the min-hops selection criterion, which uses the number of hops as the only factor in peer selection. However, due to the distinct characteristics in wireless mobile networks, a number of important factors should...
In an 802.11 wireless network with multiple access points (APs), for a commercial user, a prime concern is how to discover the desired AP since the AP providers maybe selfish and owned by different organization. This paper presents a generic reputation based framework for AP selection for this case. An M/M/1 queuing model is introduced to get a quantitative insight into the performance of wireless...
This paper focuses on the impact of the radio link control protocol (RLC) combined with the Iub congestion control on the performance of high speed uplink packet access (HSUPA) networks. The paper investigates the performance enhancement achieved by the RLC AM (acknowledged mode) with the deployment of the Iub congestion control in the HSUPA network. To show the effect of the RLC AM in the uplink,...
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