The Infona portal uses cookies, i.e. strings of text saved by a browser on the user's device. The portal can access those files and use them to remember the user's data, such as their chosen settings (screen view, interface language, etc.), or their login data. By using the Infona portal the user accepts automatic saving and using this information for portal operation purposes. More information on the subject can be found in the Privacy Policy and Terms of Service. By closing this window the user confirms that they have read the information on cookie usage, and they accept the privacy policy and the way cookies are used by the portal. You can change the cookie settings in your browser.
LTE-M, which is an abbreviated version of LTE-MTC(Machine Type Communication) can be said to have a variety of applications, including a large number of heterogeneous interconnection of large-scale network equipment. One of the most prominent problems is that the machines may have a large amount of access requests in a short time, which can easily lead to network congestion. At present, the contention-based...
A delay-SRLG constrained, path protection is proposed to encourage paths of different connections to wake up their common sleeping nodes. Simulations show superiority in maximizing the sleep of nodes while obtaining satisfactory blocking probability.
The performance of traditional TCP congestion control protocol degrades when congestion and contention increase in ad hoc networks that use the IEEE 802.11 DCF. Many of the problems result from medium contention at the media access control (MAC) layer. In this paper, we present a new contention-based congestion control (CBCC) method according to a novel congestion information from MAC layer. This...
As an essential part of Multi-channel MAC protocol, the channel scheduling algorithm aims at enhancing the network throughput and resource utilization. Based on the WAVE standard in vehicular communications, this paper improves WAVE MAC by using the time division access on service channels and proposes a channel scheduling scheme to negotiate and allocate the channel resources for throughput-sensitive...
Probe car system is used to provide real-time traffic information for telematics service. Although probe car technology is a well-known technology, how to appropriately evaluate the accuracy of a probe car system is still an unsolved issue. This paper compares several methods that are applied in the evaluation of probe car system. The shortcoming of each method is shown through data analysis of field...
This paper presents a distributed adaptive QoS medium access control (DAQ-MAC) protocol for mobile ad hoc networks. The protocol assigns nodes accessing channel in three phases: the prioritization phase, the contention phase and the transmission phase. The prioritizations of data packets are expressed by a few binary signed digits. In the prioritization phase, when binary signed digit is “0”, nodes...
Fast reservation list-to-send (FRLS) medium access control (MAC) protocol is proposed to apply to wireless networks with long propagation delay. In the protocol, a central control node (CCN) is applied to allocate the channel resources of two channels, and all the nodes transmit packets over the two channels without collision. Packet train transmission mechanism ensures that a number of packets are...
Interference in wireless sensor networks (WSNs) not only causes packet loss and delay, but also leads to excessive energy consumption. It is necessary to alleviate interference in order to improve transmission and energy efficiencies. To achieve this objective, an interference-aware cross-layer design, called interference-aware routing (IAR) protocol, is proposed. Unlike existing contention-based...
Interference in wireless ad hoc networks not only causes packet loss and delay, but also leads to excessive energy consumption. It is necessary to mitigate interference in order to improve transmission and energy efficiencies. To achieve this objective, a cross-layer routing (XLR) protocol for performance optimization is proposed. Unlike existing routing protocol, the XLR protocol employs introduced...
To resolve the channel resources waste problem of current multicast routing algorithm in low earth orbit (LEO) satellite IP networks, a core-cluster-based source-specific multicast (CSSM) algorithm and its weighted version (i.e. wCSSM algorithm) are presented. The CSSM algorithm takes source node as initial core-cluster, and expands it step by step to construct entire multicast tree with the lowest...
Based on the concept of random contention and collision resolution, a distributed QoS-guaranteed multiple access (QMA) protocol for mobile ad hoc networks is proposed to support multimedia service and multihop architecture. In the protocol, nodes with real-time traffic have higher priority to access channel than those with non-real-time traffic by broadcasting forecast bursts (FB) in earlier group...
The priority method is proposed for wireless LAN in this paper, which is that different workstations are distinguished with different business in wireless LAN, through modeling and simulation, the network performance parameters are analyzed in the priority mechanism, the results showed that the priority mechanism can achieve the better network performance. To a certain extent, it is guaranteed that...
A novel routing protocol, namely adaptive forwarding cluster routing (AFCR) protocol, is proposed to improve the network scalability in a large scale mobile ad hoc network (MANET). In the AFCR protocol, nodes are divided into several 1-hop clusters. Local routing information is exchanged between neighboring nodes to establish routes between cluster heads in adjacent clusters, which are further used...
Based on the comparison of congestion control between aeronautical telecommunication network (ATN) and IP network, a new congestion avoidance model considering the explicit congestion notification (ECN) in ATN over IP scheme, called explicit congestion notification in tunnel (ECNT) model, is proposed in this paper. In addition, a new ECN/CE mapping algorithm to map ECN signal in IP sub-network onto...
Based on the concept of contention reservation for polling transmission and collision prevention strategy for collision resolution, a fair on-demand access (FODA) protocol for supporting node mobility and multihop architecture in mobile ad hoc networks is proposed. In the protocol, a distributed clustering architecture and an idea of reserving channel resources to get polling service are adopted,...
A novel multichannel MAC protocol, namely distributed channel reservation multiple access protocol, is presented for efficient channel sharing in multihop mobile ad hoc networks. It flexibly employs request-to-send and clear-to-send (RTS/CTS) dialogue on a common channel and selects conflict-free traffic channel to accomplish the transmission of data packet based on a novel channel selection scheme...
Set the date range to filter the displayed results. You can set a starting date, ending date or both. You can enter the dates manually or choose them from the calendar.