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A Probabilistic Analysis For The Range Assignment Problem In Ad Hoc Networks
White Papers This paper considers the following problem for ad hoc networks: assume that n nodes are distributed in a d-dimensional region, with 1? This problem is studied by means of a probabilistic approach, and lower and upper bounds are established on the...
[August 30, 2007, 1:00]
Solving The Near-Far Problem In CDMA-Based Ad Hoc Networks
White Papers This paper proposes a distributed CDMA-based medium access protocol for mobile ad hoc networks (MANETs). Their approach accounts for multiple access interference (MAI) at the protocol level, thereby addressing the notorious near-far problem that...
[July 26, 2005, 6:00]
Mitigating The Exposed Node Problem In IEEE 802.11 Ad Hoc Networks
White Papers The RTS/CTS exchange partially solves the hidden node problem, but the exposed node problem remains unaddressed. This paper describes enhancements to the IEEE 802.11 DCF MAC Protocol which enable nodes to identify themselves as exposed nodes and to...
[July 7, 2006, 0:00]
Vulnerabilities Of Intrusion Detection Systems In Mobile Ad-Hoc Networks - The Routing Problem
White Papers Intrusion detection systems is one of the most active fields of research in Mobile Ad-hoc Network's (MANET) field. This systems are usually focused on detecting problems with the routing systems to prevent DoS and Man-in-the-middle and, despite of...
[June 12, 2008, 1:01]
A Two-Tier Heterogeneous Mobile Ad Hoc Network Architecture And Its Load-Balance Routing Problem
White Papers The mobile ad hoc network (MANET) has attracted a lot of interest recently. However, most of the existing works have assumed a stand-alone MANET. This paper proposes a two-tier, heterogeneous MANET architecture, which can support Internet access.
[June 28, 2004, 3:15]
Analyzing A Renaming Algorithm For Mobile Ad Hoc Networks
White Papers This paper studies an algorithm for the "Renaming" problem in mobile ad hoc networks, a problem that has not yet drawn much research attention. A Mobile Ad hoc Network(MANETs) is a collaborative group of mobile nodes that incorporates wireless...
[August 23, 2007, 1:00]
GPS-Free Node Localization In Mobile Wireless Sensor Networks
White Papers An important problem in mobile ad-hoc wireless sensor networks is the localization of individual nodes, i.e.each node's awareness of its position relative to the network. To address these issues, this paper proposes an algorithm for directional...
[July 20, 2007, 1:00]
A One-Pass Heuristic For Cooperative Communication In Mobile Ad Hoc Networks
White Papers This problem, known as the Cooperative Communication Problem in Mobile Ad Hoc Networks, is known to be NP-hard. Ad hoc networks are used to provide communications means among agents that need to accomplish common goals.
[May 10, 2006, 1:00]
ATP: A Reliable Transport Protocol For Ad-Hoc Networks
White Papers Existing works have approached the problem of reliable transport in ad-hoc networks by proposing mechanisms to improve TCP's performance over such networks. Given that ad-hoc networks are typically stand-alone, the paper approaches the problem of...
[December 6, 2007, 0:01]
Maximal Throughput Of Spatial TDMA In Ad Hoc Networks
White Papers This paper studies the problem of resource optimization in ad hoc networks, where spatial TDMA (STDMA) is used as the access scheme. In ad hoc networks, temporary communication links are set up by a number of units, without the need of any fixed...
[July 20, 2004, 3:00]
Minimal CDMA Recoding Strategies In Power-Controlled Ad-Hoc Wireless Networks
White Papers However, very little work has been done on the very realistic distributed, dynamic version of the CDMA transmitter-oriented code assignment (TOCA) problem in an ad-hoc network. This paper presents a set of local, distributed recoding strategies for...
[July 25, 2004, 3:16]
Securing Ad Hoc Wireless Networks Against Data Injection Attacks Using Firewalls
White Papers The paper first shows that, given the locations of attackers and victims, the problem of placement of firewall functionality at a fixed number of ad hoc nodes while minimizing the impact of the data injection attack is identical to the k-Coverage...
[August 23, 2007, 1:00]
Impact Of Power And Rate Selection On The Throughput Of Ad Hoc Networks
White Papers This paper investigates the problem of how to adjust the power level and the PHY rate in order to maximize the network throughput in wireless ad hoc networks. Solving this problem can help solve the problem of computing the network capacity of ad...
[May 24, 2007, 1:00]
DART: Dynamic Address RouTing For Scalable Ad Hoc And Mesh Networks
White Papers Most current ad hoc routing architectures use flat static addressing and thus, need to keep track of each node individually, creating a massive overhead problem as the network grows. It is well known that the current ad hoc protocol suites do not...
[August 4, 2008, 19:08]
Capacity Assignment In Bluetooth Scatternets - Optimal And Heuristic Algorithms
White Papers Bluetooth enables portable electronic devices to communicate wirelessly via short-range ad-hoc networks. However, in due course, there will be a need for forming multihop ad-hoc networks over Bluetooth, referred to as scatternets.
[August 12, 2005, 6:00]
Hidden Terminal Analysis On TCP Stability Over Multihops Ad Hoc Networks
White Papers The goodput of TCP flow over multihops ad hoc networks varies enormously with the increase of hops number between the sender and receiver. This jitter leads to the TCP instability and impediments the web applications in multihops ad hoc networks.
[January 9, 2008, 0:01]
Windows Wi-Fi Attack Discovered
Talkback Just sit outside any office building with a WiFi router or access point, or as we now find out, a laptop with an ad-hoc connection profile with its SSID set to Linksys or tmobile, and see how many laptops connect to it.
[January 20, 2006, 9:38]
Q&A: Bell Labs Eyes Broadband's Future
News Security is not something that you do ad hoc. Security is not something that you do ad hoc. Here's an interesting problem. If the package with which it's supposed to deal is encrypted and it cannot inspect what's inside, that's a problem.
[June 13, 2003, 13:24]
On The Construction Of 2-Connected Virtual Backbone In Wireless Networks
White Papers Virtual backbone has been proposed as the routing infrastructure to alleviate the broadcasting storm problem in ad hoc networks. Since the nodes in the virtual backbone need to carry other node's traffic, and node and link failure are inherent in...
[August 10, 2007, 9:46]
Primal-Dual Based Distributed Algorithms For Vertex Cover With Semi-Hard Capacities
White Papers E.g.the scatternet-formation problem of ad hoc Bluetooth networks asks for a small dominating set where each node in the set dominates at most 7 vertices. More generally, a small dominating set can act as the backbone of the routing infrastructure...
[September 16, 2005, 3:00]
