Subscribe to the gold package and get unlimited access to Shamra Academy
Register a new userA Game Model for the Hidden Terminal Problem in Ad-Hoc Networks
نَموذَج لعبَة لِمسْأَلة العُقدَة المُخْتَفيَة في الشّبكات اللاّسلكيّة الغائيّة
1498
0 6
0
(
0
)
Added by
Aِl-Baath University ورقة بحثية
Publication date
2016
fields
Mathematics
and research's language is
العربية
Created by
Shamra Editor
Ask ChatGPT about the research
نهتم في هذا البحث بدراسة مسألة الأزدحام عند العقد المتوسطة في الشبكات اللاسلكية الغائية. سنقوم بتقديم نموذج لعبة يفسر نظريا آلية نقترحها للتحكم بالازدحام.
In this paper we introduce a game model that explains our proposed approach aiming at preventing the disappearance of the intermediate nodes.
References used
DREW F, JEAN T, 1990 - Game Theory. The MIT Press
Jacobson V, J Karels, 1988 - Congestion Avoidance and Control
Jan R, 1990 - Congestion Control in Computer Networks: Issue and Trends, IEEE Network Magazine
Artificial intelligence review:
Research summary
يتناول البحث مشكلة العقدة المختفية في الشبكات اللاسلكية الغائية، وهي مشكلة تحدث عندما تتداخل إشارات العقد المتوسطة مما يؤدي إلى اختفائها وانهيار الشبكة. يقترح الباحثون نموذج لعبة يعتمد على استراتيجية ناش للتحكم في الازدحام عند العقد المتوسطة. يتم استخدام بروتوكول توجيه يعتمد على مصفوفة التكلفة لتجنب الازدحام، وتم التحقق من فعالية النموذج المقترح من خلال محاكاة أظهرت تحسينات في تقليل عمليات التوجيه الفاشلة والحد من الازدحام. يتضمن البحث أيضًا تقديم آلية جديدة للتحكم في الازدحام باستخدام طرود تحكم تمكن العقد المتوسطة من تنظيم عملية إرسال الطرود، مما يساهم في تحسين أداء الشبكة بشكل عام.
Critical review
دراسة نقدية: يُعد هذا البحث إضافة قيمة لمجال الشبكات اللاسلكية الغائية، حيث يقدم حلاً لمشكلة العقدة المختفية باستخدام نموذج لعبة يعتمد على استراتيجية ناش. ومع ذلك، يمكن تحسين البحث من خلال تقديم تحليل أكثر تفصيلاً لتأثير عدد العقد في الشبكة على فعالية النموذج المقترح. كما يمكن توسيع الدراسة لتشمل أنواعًا أخرى من الشبكات اللاسلكية وتقييم أداء النموذج في بيئات مختلفة. بالإضافة إلى ذلك، قد يكون من المفيد تقديم مقارنة مع حلول أخرى موجودة في الأدبيات لتوضيح المزايا والعيوب النسبية للنموذج المقترح.
Questions related to the research
-
ما هي مشكلة العقدة المختفية في الشبكات اللاسلكية الغائية؟
مشكلة العقدة المختفية تحدث عندما تتداخل إشارات العقد المتوسطة في الشبكة اللاسلكية الغائية، مما يؤدي إلى اختفائها وانهيار الشبكة.
-
ما هو الهدف الرئيسي من البحث؟
الهدف الرئيسي من البحث هو تقديم نموذج لعبة يعتمد على استراتيجية ناش للتحكم في الازدحام عند العقد المتوسطة في الشبكات اللاسلكية الغائية.
-
كيف تم التحقق من فعالية النموذج المقترح؟
تم التحقق من فعالية النموذج المقترح من خلال محاكاة أظهرت تحسينات في تقليل عمليات التوجيه الفاشلة والحد من الازدحام.
-
ما هي الآلية الجديدة المقترحة للتحكم في الازدحام؟
الآلية الجديدة المقترحة للتحكم في الازدحام تتضمن استخدام طرود تحكم تمكن العقد المتوسطة من تنظيم عملية إرسال الطرود، مما يساهم في تحسين أداء الشبكة.
rate research
Read More
In this search, we provide a study
about the security in VANET networks which are considered to be a
part of mobile wireless networks and designed to work between
moving vehicles. The most important security flaws of this
networks and its applica
tions are studied.
In fact, we study the most important and dangerous attacks that may
target VANET networks and analyze its main risks. Furthermore,
we simulate some of these attacks Specifically Denial-of Service
(DOS) attack using prober tools depending on chosen parameters
that characterize the network performance. moreover, we provide
some Security solutions to help counter measuring these attacks and
minimize this effects, and Finally we apply these solutions and
evaluate them.
Product quantization (PQ) is a widely used technique for ad-hoc retrieval. Recent studies propose supervised PQ, where the embedding and quantization models can be jointly trained with supervised learning. However, there is a lack of appropriate form
ulation of the joint training objective; thus, the improvements over previous non-supervised baselines are limited in reality. In this work, we propose the Matching-oriented Product Quantization (MoPQ), where a novel objective Multinoulli Contrastive Loss (MCL) is formulated. With the minimization of MCL, we are able to maximize the matching probability of query and ground-truth key, which contributes to the optimal retrieval accuracy. Given that the exact computation of MCL is intractable due to the demand of vast contrastive samples, we further propose the Differentiable Cross-device Sampling (DCS), which significantly augments the contrastive samples for precise approximation of MCL. We conduct extensive experimental studies on four real-world datasets, whose results verify the effectiveness of MoPQ. The code is available at https://github.com/microsoft/MoPQ.
Decoupling the decision-making process from the data forwarding process is the heart of
software-defined networks technology. One of the most important components of this
technology is the controller, which is the smartest component in the network.
Many of the
controllers have been developed since the technology originated, and many researches
have been done to compare the performance of these controllers for productivity, delay and
protection.
And due to the importance of selecting the appropriate controller according to different
parameters and network states, we studied the performance of four controllers: Floodlight,
Beacon, Nox, RYU in terms of productivity, RTT, time of establishing connection with an
OpenFlow switch and the time for adding an input to the switch flow table. The results
showed that the Beacon control was superior in performance when the number of switches
in the network was equal to the number of processor cores used by the controller. For RTT
and the time needed to add an input to the flow table, the NOX controller achieved less
time. Finally, the Floodlight controller was the best in terms of establishing connection
with the switch because it needed less time.
Mobile Ad-Hoc Networks are used for data transfer. The nodes of such
networks do not require presetting. They are characterized by dynamic
data transfer during their movement of the nodes. MANET could be
targeted by potential security breaches. Bl
ack hole attack is one of the
serious attacks targeting wireless AD_HOC networks through a false
point whichcan absorb data and send them to another place or neglect
them. This is due to the lack of central control node which is able to
manage communications. This research investigates the effects of the
black hole on the performance of hybrid routing protocol Temporally
Ordered Routing Algorithm (TORA) and proactive routing protocol
Optimized Link State Routing (OLSR) for a variable number of mobile
nodes in different speeds in a high load environment.
Distributed Denial of Service attack (DDOS) on Vehicular Ad Hoc Networks
(VANETs) is considered to be one of the most serious types of attacks that can be targeted
to those networks. The danger of this attack is in the difficulty of detection becau
se of the
cooperation of several attacking nodes in the network, and its impact on the availability
requirement that is one of the most important security requirements in a network offering
real-time applications .In our research, we study the effect of this attack on VANET
network in the city, taking into consideration two cases. In the first case the target of the
attack is the nodes, while in the second one, the target is the road side units (RSU).
Simulation results have shown that this attack has a significant impact on both cases, by
comparing the basic parameters of the network, such as throughput in/out and the number
of dropped packets, before and after the attack.
suggested questions
Log in to be able to interact and post comments
comments
Fetching comments
Sign in to be able to follow your search criteria
