Low-Feedback Opportunistic Scheduling Schemes for Wireless Networks with Heterogenous Users

الموضوعات

علوم تطبيقية وتكنولوجية

الملخص

Efficient implementation of resource sharing strategies in a multi-user wirelessenvironment can improve the performance of a network significantly. In this thesiswe study various scheduling strategies for wireless networks and handle the problemof opportunistically scheduling transmissions using channel aware schemes.First we propose a scheme that can handle users with asymmetric channel conditionsand is opportunistic in the sense that it exploits the multi-user diversity of thenetwork. The scheme requires the users to have a priori knowledge of their channeldistributions. The associated overhead is limited meaning it offers reduced feedbackload, that does not scale with the increasing number of users. The main techniqueused to shrink the feedback load is the contention based distributed implementationof a splitting algorithm that does not require explicit feedback to the scheduler fromevery user. The users find the best among themselves, in a distributed manner, whilerequiring just a ternary broadcast feedback from the scheduler at the end of eachmini-slot. In addition, it can also handle fairness constraints in time and throughputto various degrees.Next we propose another opportunistic scheduler that offers most of the benefitsof the previously proposed scheme but is more practical because it can also handle heterogenous users whose channel distributions are unknown. This new schemeactually reduces the complexity and is also more robust for changing traffic patterns.Finally we extend both these schemes to the scenario where there are fixed thresholds,this enables us to handle opportunistic scheduling in practical systems that canonly transmit over finite number of discrete rates with the additional benefit that fullfeedback session, even from the selected user, is never required.

روابط وملفات

التعريف والنوع

رقم الوثيقة

ffcd9a20-af04-434f-bf04-5bd02aaf8746

رقم العقد

0

نوع الوسائط

Crawler

نوع المحتوى

الرسائل العلمية

صيغة المصدر

رسائل ماجيستير

نوع الملف

pdf text

أسماء الملفات

1700773_1.pdf

بيانات النشر

ألقاب المؤلفين

[{"name_ar":"فران رشيد","title_ar":"اعداد","title_en":"Preparation"},{"name_ar":"محمد سليم","title_ar":"اشراف","title_en":"Supervision"}]

اللغة

English

المصدر والدورية

اسم المصدر

Low-Feedback Opportunistic Scheduling Schemes for Wireless Networks with Heterogenous Users

المحتوى والصفحات

عدد الصفحات

0

كلمات الباحثين

Scheduling Feedback Fairness Splitting Opportunistic Multi-user diversity

إشراف وإعداد

الإشراف

محمد سليم

الإعداد

فران رشيد

الاقتباسات الببليوغرافية