Abstract: Cellular networks have been developed for voice telephone service using circuit switched technology.They are usually complex and large in terms of their network scale and operational features,high speed mobility,low data rate, and wide area coverge..The aim of the process of cellular networks evolution is to have an all IP network architecture to provide high bit rate multimedia services including voice,audio, video and data. Multimedia services require multiple sessions over one physical channel which could be provided by packet switched networks. The common protocol is IP.The Internet and cellular systems have been designed and implemented by people with different backgrounds in computers and communications, respectively.Their integration can be considered a first step toward next generation networks, where heterogeneous nettworks must work together in order to provide differential services to users in seamless and transparent manner. Next generation cellular networks are expected to provide richer and more diverse multimedia services. However,the current cellular network architecture may not be economically feasible to cater to the requirements of future mobile communication services.As an alternative to cellular communications, ad hoc networking is a wireless communication technology distinguished
by communicating via multihop transmissions. The multihop cellular network(MCN) which combines the characteristics of ad hoc networking with these of a cellular network,has been drawing a lot of attention. Namely, MCN incorporates the flexibility of ad hoc networking,while preserving the benefits of using an infrastructure.The advantage of using MCN includes capacity enhancement,coverage extension,network scalability, and power reduction.The main motivation for integrating multihop transmission in cellular networks is to enhance coverage and network capacity. Relaying can be used to assist communications to and from mobile hosts (MHS) at the cell edge or MHs experiencing deep fading in their home base station (BS). This presentation starts with the background of the problem.Next,integration of cellular and internet services including a cooperation in multihop cellular networks will be analyzed.Some examples will be included,too. Finally, 4G cellular standards,together with research challenges conclude the lecture. It is pointed that there are still a number of open research issues that need to be solved in order to provide an efficient and effective multihop transmissions in cellular networks in the future.

Brief Biography of the Speaker:
Prof.dr Zoran Bojkovic (http://www.zoranbojkovic.com) is a full professor of Electrical Engineering at the University of Belgrade,Serbia and a permanent visiting professor at the University of Texas at Arlington, TX, USA, EE Department, Multimedia System Lab. He was a visiting professor in more than 20 Universities worldwide and has taught a number of courses in Electrical Technology, Telecommunication Systems and Networks, Speach, Image and Video Processing, Multimedia Wire/Wireless Communication Systems, Computer Networks. Prof. Bojkovic is the co-author of 6 international books/monographies ( Publishers: Prentice-Hall, Wiley, CRC Press, WSEAS ) Also, some of these books have been published and translated in Canada, China, Singapore and India. He is co-editor in 62 International Books and Conference Proceedings. He has published more than 420 papers in peer-reviewed journals, conference proceedings and publications.He has conducted keynote/plenary lectures, workshops/tutorials as well as seminars , and participated in more than 70 scientific and industrial projects all over the world.He has been a consultant to industry research institutes and academia. His activities included serving as Editor- in- Chief in 2 International Journals and as Associate Editor in 3 International Journals. Prof. Zoran Bojkovic is an active researcher in wire/wireless multimedia communications. He is a Senior Member of IEEE and WSEAS, member of EURASIP, full member of Engineering Academy of Serbia as well as a member of Serbian Scientific Society.