Coded cooperative data exchange problem for general topologies

Mira Gonen, Michael Langberg

نتاج البحث: فصل من :كتاب / تقرير / مؤتمرمنشور من مؤتمرمراجعة النظراء

ملخص

We consider the coded cooperative data exchange problem for general graphs. In this problem, given a graph G = (V, E) representing clients in a broadcast network, each of which initially hold a (not necessarily disjoint) set of information packets; one wishes to design a communication scheme in which eventually all clients will hold all the packets of the network. Communication is performed in rounds, where in each round a single client broadcasts a single (possibly encoded) information packet to its neighbors in G. The objective is to design a broadcast scheme that satisfies all clients with the minimum number of broadcast rounds. The coded cooperative data exchange problem has seen significant research over the last few years; mostly when the graph G is the complete broadcast graph in which each client is adjacent to all other clients in the network, but also on general topologies, both in the fractional and integral setting. In this work we focus on the integral setting in general undirected topologies G. We tie the data exchange problem on G to certain well studied combinatorial properties of G and in such show that solving the problem exactly or even approximately within a multiplicative factor of log |V| is intractable (i.e., NP-Hard). We then turn to study efficient data exchange schemes yielding a number of communication rounds comparable to our intractability result. Our communication schemes do not involve encoding, and in such yield bounds on the coding advantage in the setting at hand.

اللغة الأصليةالإنجليزيّة
عنوان منشور المضيف2012 IEEE International Symposium on Information Theory Proceedings, ISIT 2012
الصفحات2606-2610
عدد الصفحات5
المعرِّفات الرقمية للأشياء
حالة النشرنُشِر - 2012
الحدث2012 IEEE International Symposium on Information Theory, ISIT 2012 - Cambridge, MA, الولايات المتّحدة
المدة: ١ يوليو ٢٠١٢٦ يوليو ٢٠١٢

سلسلة المنشورات

الاسمIEEE International Symposium on Information Theory - Proceedings

!!Conference

!!Conference2012 IEEE International Symposium on Information Theory, ISIT 2012
الدولة/الإقليمالولايات المتّحدة
المدينةCambridge, MA
المدة١/٠٧/١٢٦/٠٧/١٢

بصمة

أدرس بدقة موضوعات البحث “Coded cooperative data exchange problem for general topologies'. فهما يشكلان معًا بصمة فريدة.

قم بذكر هذا