# Home > Communications-Protocols > Wireless Connectivity

```
```

**Download**

**129**

times
**Topic under **Wireless Connectivity

**Source:** ee.sharif.edu

**File size:** **301 kb**

**File type:** **pdf**

**Last download on:**
Sun May 14, 2017 02:23:17 PM

__Short Desciption__:

In this paper an ad-hoc network is considered where there is no infrastructure and intermediate nodes send packets toward their destinations. It is common in such networks to use random access since random access algorithms are inherently distributed given that nodes themselves decide when to access the channel [1]. The main characteristic of random access is independent transmission of nodes.

__Summary__:

Abstract— Energy consumption should be minimized in wireless networks since nodes are supplied with limited energy batteries. Energy minimization increases the time that networks’ nodes work properly without recharging or substituting batteries. Another criterion for network performance is data transmission at the proper rates which is usually quantified by means of network utility function. There exists an inherent tradeoff between these criteria and enhancing one of them can deteriorate the other one. In this paper we consider both Network Utility Maximization (NUM) and energy minimization in a bicriterion optimization problem. The problem is formulated in Random Access (RA) which is the most practical Medium Access Control (MAC) for ad-hoc networks. First, we optimize performance of MAC and define utility as a monotonically increasing function of link throughputs. We investigate the optimal tradeoff between energy and utility in this part. In the second part, we define utility as a function of end to end rates and optimize MAC and transport layers simultaneously. We calculate optimal persistence probabilities and end to end rates. Finally, by means of duality theorem we decompose the problem into smaller subproblems, which are solved at nodes and network layers separately. This decomposition avoids central unit and sustains benefits of layering.
Keywords- Energy-utility tradeoff; persistence probability, random access; convex optimization; distributed algorithm.

Bookmark or share this info on Google+ and leave comment at below :

```
```

```
```

```
People who downloaded this also viewed in this sites:
```

__Fundamentals of Wireless Communication__

Fundamentals of Wireless Communication, 1 Introduction 12
1.1 Book Objective . 12
1.2 Wireless Systems 13
1.3 Book...__Data Networks Flow Control__

Second Edition
Data
Networks
DIMITRI BERTSEKAS
Massachusetts Institute of Technology
ROBERT GALLAGER
Massachusetts Institute of Technology, 6.1...__Multiaccess Communication__

The subnetworks considered thus far have consisted of nodes joined by point-to-point
communication links. Each such link might consist physically of...

```
Leave comment :
```

"Energy and Utility Optimization in Wireless Networks with Random Access"

```
Related Free Files
```

```
Fundamentals of Wireless Communication... - Download:
```

**337** times

Wireless Networking in the Developing World... - Download: **79** times

Routing in Data Networks... - Download: **85** times

Principles of Digital Communication... - Download: **488** times

Hacking Wireless Networks for Dummies... - Download: **217** times

A Guide to Wireless Networking and... - Download: **78** times

Introduction and Layered Network... - Download: **207** times

DATA NETWORKS - Queing Data Networks... - Download: **67** times

Mobile Wireless Communications... - Download: **859** times

Point-to-Point Protocols and Links... - Download: **171** times