For nearly a hundred years telecommunications provided mainly voice services and very low speed data (telegraph and telex). With the advent of the internet, several data services became mainstream in telecommunications; to the point that voice is becoming an accessory to IP-centric data networks. Today, high-speed data services are already part of our daily lives at work and at home (web surfing, e-mail, virtual private networks, VoIP, virtual meetings, chats...). The demand for high-speed data services will grow even more with the increasing number of people telecommuting.
上傳時(shí)間： 2020-05-27
上傳用戶：shancjb
Do you have a mobile phone? We think you probably do, one way or another. We would also guess that you might use it for many diff erent things in the course of your everyday life—as a telephone certainly, but also as an address book, as a clock or watch, as a camera, or now as a connection to your computer, email and the internet. Th ere will be a range of people you use it to contact (or not), and various strategies you use to take calls—or send texts, or take photos, or receive emails, or search online (or not, in diff erent situations). Th ere are also likely to be a range of social relation- ships in your life that your mobile phone helps to maintain—or disrupts, or inter- venes in, or makes possible, or complicates, or just plain helps to handle.
標(biāo)簽： Communications Introduction Mobile Media New An to
上傳時(shí)間： 2020-05-30
上傳用戶：shancjb
Smartphones have become a key element in providing greater user access to the mobile internet. Many complex applications which used to be limited to PCs, have been developed and operated on smartphones. These applications extend the functionalities of smartphones, making them more convenient for users to be connected. However, they also greatly increase the power consumption of smartphones, making users frustrated with long delays in Web browsing.
標(biāo)簽： Browsing Mobile Cloud Using Web the
上傳時(shí)間： 2020-05-30
上傳用戶：shancjb
In case you haven’t noticed, multimedia communication over IP and wireless net- works is exploding. Applications such as BitTorrent, used primarily for video downloads, now take up the lion’s share of all traffic on the internet. Music file sharing, once on the legal cutting edge of massive copyright infringement on col- lege campuses around the world, has moved into the mainstream with signifi- cant legal downloads of music and video to devices such as the iPod and nu- merous other portable media players.
標(biāo)簽： Multimedia Over IP
上傳時(shí)間： 2020-05-31
上傳用戶：shancjb
Coverage of routing techniques in various wired and wireless networks is the unique proposition of this book. Routing protocols and algorithms are the brains of any network. The selection of topics in this book is clear: we attempt to explain routing in its entirety, starting from fundamental concepts, then moving through routing on the internet, and finally cutting across the recent‐day cellular, ad hoc, and wireless networks.
標(biāo)簽： Fundamentals Applications Network Routing
上傳時(shí)間： 2020-05-31
上傳用戶：shancjb
Informationnetworkinghasemergedasamultidisciplinarydiversifiedareaofresearchover thepastfewdecades.Fromtraditionalwiredtelephonytocellularvoicetelephonyandfrom wired access to wireless access to the internet, information networks have profoundly impactedourlifestyle.Atthetimeofwriting,over3billionpeoplearesubscribedtocellular services and close to a billion residences have internet connections.
標(biāo)簽： Fundamentals Networking
上傳時(shí)間： 2020-05-31
上傳用戶：shancjb
Recent decades have shown a tremendous expansion of the internet. The number of connected terminals has increased by orders of magnitude, traffic has grown exponen- tially, coverage has become ubiquitous and worldwide, and today’s sophisticated Web 2.0 applications are increasingly providing services which hitherto have been the realm of telecommunications, such as Skype and video conferencing. This has even led to the thought that access to the internet might one day be a universal right of every citizen. This evolution will accelerate in the coming decades.
標(biāo)簽： Networking Personal Networks Wireless
上傳時(shí)間： 2020-05-31
上傳用戶：shancjb
Soon after Samuel Morse’s telegraphing device led to a deployed electri- cal telecommunications system in 1843, waiting lines began to form by those wanting to use the system. At this writing queueing is still a significant factor in designing and operating communications services, whether they are provided over the internet or by other means, such as circuit switched networks.
標(biāo)簽： Telecommunication Queueing Packet Theory with
上傳時(shí)間： 2020-05-31
上傳用戶：shancjb
It was only a few years ago that “ubiquitous connectivity” was recognized as the future of wireless communication systems. In the era of ubiquitous connectivity, it was expected that the broadband mobile internet experience would be pervasive, and seamless connectivity on a global scale would be no surprise at all. The quality of service would be guaranteed no matter when/where/what the users wanted with the connectivity. Connectivity would even be extended to object-to-object communication, where no human intervention was required. All objects would become capable of autonomous communication.
標(biāo)簽： Protocols Radio LTE-A LTE for and
上傳時(shí)間： 2020-06-01
上傳用戶：shancjb
Digital mobile wireless communication and the internet have undergone a fantastic growth in the last few years and, despite originating from two different worlds, they are converging. This convergence corresponds to the evolution of mobile systems towards the highest broadband data transmissions (GSM, EDGE/GPRS, UMTS then HSDPA), while the computing world gets equipped with wireless technologies such as Wi-Fi or Wi-Max.
標(biāo)簽： Reconfigurable Systems Mobile Radio
上傳時(shí)間： 2020-06-01
上傳用戶：shancjb
蟲蟲下載站版權(quán)所有 京ICP備2021023401號(hào)-1
