Optimality and Approximate Optimality of Source-Channel Separation in Networks

نویسندگان
چکیده

برای دانلود باید عضویت طلایی داشته باشید

برای دانلود متن کامل این مقاله و بیش از 32 میلیون مقاله دیگر ابتدا ثبت نام کنید

اگر عضو سایت هستید لطفا وارد حساب کاربری خود شوید

منابع مشابه

On Source-Channel Separation in Networks

We study the effect of source and channel coding separation in communication networks. While in general separating source and channel coding is sub-optimal, we show that in all communication networks (noisy or noiseless, wireless or wireline, with memory or memoryless, . . .), with independent Gaussian sources and arbitrary demands, there always exists a separated scheme that achieves a distort...

متن کامل

Optimality conditions for approximate solutions of vector optimization problems with variable ordering structures

‎We consider nonconvex vector optimization problems with variable ordering structures in Banach spaces‎. ‎Under certain boundedness and continuity properties we present necessary conditions for approximate solutions of these problems‎. ‎Using a generic approach to subdifferentials we derive necessary conditions for approximate minimizers and approximately minimal solutions of vector optimizatio...

متن کامل

Optimality of Certain Channel Aware Scheduling Policies

With an abstraction of serving rate-adaptive sources on a broadcast-type wireless channel as a utility maximization problem, it is shown how one can design many intuitive online scheduling policies based upon the feedback that one obtains at the scheduler. Using a stochastic approximation argument it is then shown that the constructed algorithms converge to optimal solutions of the utility maxi...

متن کامل

Robustness and Optimality in CSMA Wireless Networks

It has recently been shown that distributed queuebased adaptation of CSMA’s contention aggressiveness can provably optimize network utility. However, such an approach is fragile, and was shown to suffer high performance degradation under conditions of frequent occurrence, namely; asymmetric channels, heterogeneous traffic, and packet collisions. In this work, we address the main sources of perf...

متن کامل

Optimality Of Community Structure In Complex Networks

Community detection is one of the pivotal tools for discovering the structure of complex networks. Majority of community detection methods rely on optimization of certain quality functions characterizing the proposed community structure. Perhaps, the most commonly used of those quality functions is modularity. Many heuristics are claimed to be efficient in modularity maximization, which is usua...

متن کامل

ذخیره در منابع من


  با ذخیره ی این منبع در منابع من، دسترسی به آن را برای استفاده های بعدی آسان تر کنید

ژورنال

عنوان ژورنال: IEEE Transactions on Information Theory

سال: 2014

ISSN: 0018-9448,1557-9654

DOI: 10.1109/tit.2013.2291787