CRITICAL ANALYSIS OF CROSS-LAYER APPROACH G.N.Vivekananda P.Chenna Reddy Research Scholar, Dept. of CSE Professor, Dept. of CSE JNTUA College of Engineering JNTUA College of Engineering Pulivendula, A.P., India Pulivendula, A.P., India vivekanandagn@gmail.com pcreddy1@rediffmail.com Abstract— Internet has become everyday utility. Internet is ubiquitous. All the devices including household devices are connected to the Internet. Layer approach is used for the design of Internet. Layered approach is robust but is designed for wired networks. Cross-layer approach is examined extensively in mobile networks because of the layered approach inability to provide the required performance. There are many tradeoffs associated with the use of Cross-layer approach. It breaches the basic principles of layered approach and may compromise the robust nature of the Internet. But with wide use of multimedia applications and mobile devices, we cannot continue to use layered approach as it is. In this paper justification the role of Cross-layer approach is presented, and critical analysis of it is done to identify its limitations. Keywords— Cross-Layer; Internet; Layered approach; Wireless networks; I. INTRODUCTION The Internet and its technologies are growing at a rapid rate [1]. A Survey of Cisco presented interesting results, as shown in Fig.1 [2]. As we are trying to access the Internet from everywhere, using every possible device, its traffic is going to increase and is expected to triple in the next five years. Fig.1: Cisco forecast of Global Internet Wired and Mobile Traffic Increase of Internet users, increase in Internet enabled devices, increase in bandwidths, and also increase in video related traffic are some reasons for increase in the Internet traffic. Traffic from mobile network devices goes beyond traffic from wired devices by 2019. By 2019, it is expected that IP traffic due to wired devices accounts for 33 percent of the global traffic, whereas mobile devices and its procedures accounts for 66 percent of the whole. Wired devices and its policies resulted in maximum usage of 54 percent of the global IP traffic in 2014. In recent times, for provisioning the wireless and mobile access, mobile networks are preferred due to their flexibility to provide communication [3]. Mobile networks can penetrate to the areas which cannot be reached by the wired networks. This requires an improvement in the performance that mobile networks offers in terms of throughput, congestion control, delay variations, stability and security. As the high level features of present wireless knowledge can be used to provide the better performances in various applications like online streaming and gaming, this paper besides critically analyses and evaluates the functionality issues of current and upcoming considerations of Cross-layer approach in wireless standards. It also studies their suitability for the transmission in wireless networks [4]. The principal motive behind proposing Cross-layer approach is to deal with the different issues that cannot be answered by the layered approach. In this paper, we approached various classifications of analysis and made a critique about Cross-layer approach in mobile networks. As per the various sources surveys and reports, by 2050 all the file sharing and high loads of Internet traffic will be only through different heterogeneous applications. There is need to bring coordination among different conventional layers to achieve the required performance improvement to support the applications of next generation. This paper presents the reader with the perception of the Cross-layer approach, drawing the motives and requirements, and offers the main outline enabling collaboration between layers. The study and analysis that is carried out in this paper would represent the roadmap for choosing an appropriate technique to be used in wireless networks for transfer of various multimedia related applications. The study would also classify the issues regarding layered approach and Cross-layer approach. We believe that these challenges could also be used for laying out the foundations for the design of new network models for different mobile network standards at different levels for the efficient transmission of resources. The organization of the remaining paper is as follows. Section 2 exhibits the literature review that comprises of the 12