MAKING MOBILE MULTIMEDIA A REALITY With mobile communications and the Internet coming ever closer together, the world is quickly evolving towards the Mobile Information Society. In the very near future, most personal communications - phone calls, images and multimedia messaging - will be mobile. Did you know that estimates suggest that the milestone of one billion people in the world using a mobile phone will be reached by the end of year 2002? It is expected that 2000 10-15% of all mobile phones sold will be Internet...
MOBILE INTERNET 3G migration to high-speed, packet-based data creates the conditions for the mobile and Internet worlds to converge, providing mobile users with new opportunities to access Internet-based services and applications. This in turn will stimulate demand for high data rate connectivity as well as helping reduce subscriber management costs.
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1st Generation Mobile Telecommunications. First generation systems are analog and were designed for voice transfer. AMPS, NMT, TACS, etc are included among first generation systems. With the recent proliferation of PDC/PHS in Japan, post-analog technology has advanced rapidly and consequently only a very few analog systems remain in existence. 2nd Generation Mobile Telecommunications.
For this reason, 3GPP (under which the next stage GSM speech quality will be realised) has selected the AMR codec as an essential speech codec for the next generation system. AMR was jointly developed by Nokia, Ericsson and Siemens.
Bluetooth has begun to experience rapid proliferation, and is fast becoming a defacto world-wide standard. Nokia participates as a founding member in the Bluetooth Special Interest Group (SIG). Current membership inSlG comprises over 1300 firms from all over the world.
Common Intermediate Format. CIF is a video image format using 352 horizontal pixels and 288 vertical lines. The format is adopted in multimedia communication standards. CIRCUIT SWITCHED SERVICE This is a data transfer communication service which (as in the case of standard telephone service) applies circuitswitching for each call to establish a circuit with the other party and then disconnect that circuit upon call completion.
PDA operating systems and thus has the capacity to enhance the multimedia capacity of mobile phones. EPOC is being developed by Symbian, a joint company of Psion, Nokia, Ericsson, Motorola and Matsushita (Panasonic). It constitutes an open platform optimised for mobile phone use.
The Global Positioning System is a worldwide radio-navigation system that was developed by the US. Department of Defence. In addition to military purposes it is widely used in marine and terrestrial navigation (for example car navigation systems). GSM 1800 GSM cellular system operating in the 1800 MHz frequency band (also referred to as PCN or PCN 1800 or DCS 1800).
H.324M The H.324 recommendation was formulated by ITU in 1995. It is an umbrella recommendation that defines multimedia communication algorithms and protocols for Public Switched Telephony Networks. The recommendation has been extended (H.324M) for use in mobile circuit-switched networks as well. HIPERLAN High Performance Radio Local Area Network.
IMAP4 Internet Messaging Access Protocol. IMAP is a remote mailbox access protocol. It enables efficient operation such as downloading only essential data by first acquisitioning the e-mail header prior to actual e-mail download. This feature makes the protocol well suited to remote environments. I-MODE i-mode is a wireless service launched in Japan in spring 1999 by NTT DoCoMo.
This system has been incorporated in notebook PCs, PDAs, and most recently in the NM208 (PDC) model portable phone by Nokia as well, and has become a worldwide defacto standard. The standards set by IrDA include the lrTran-P protocol for still images.
International Telecommunications Union. ITU is a UN affiliated body engaged in standardisation relevant to international telecommunications. It includes two standardising divisions, i.e. ITU-T (standardisation for modems, ISDN, network interfaces for communication system operators, etc.) and ITU-R (standardisation related to radio communication services). Standards established by the organisation are referred to as “recommendations”, and are formally adopted as such only upon the unanimous consent of all member countries.
JAVA Programming language developed by Sun Microsystems. Some versions of Java are likely to be used in the creation of wireless services. Java is primarily characterised by the fact that programs written in the language do not rely on an operating system. JPEG JPEG (Joint Photographic Expert Group) compression standard was developed by ISO and ITU in 1990.
Multimedia Messaging Service is a new standard that is being defined for use in advanced wireless terminals. The service concept is derived from Short Message Service and allows for non-real-time transmission of various kinds of multimedia contents like images, audio, video clips, etc. As a further evolution of the current text mail, for example, electronic postcards, audio/video clips, etc.
Personal Digital Communications. A digital cellular standard presently being used in Japan. To avoid the previous problem of lack of compatibility between the differing types of earlier analog mobile phones in Japan (i.e. NTT type and US developed TACS type), digital mobile phones have been standardised under PDC.
Quality of Service. QoS indicates user perception of a particular service and is defined in terms of a range of technical parameters including delay, jitter, reliability, etc. Under the OSI reference model stipulated by ISO, QoS is considered to be controlled at the network layer (third layer). Although definition varies depending on the type of network service, the following service classes apply in the case of ATM (asynchronous transfer mode).
SYMBIAN Symbian is a company created jointly by Psion, Nokia, Ericsson and Motorola in June 1998 with the primary aim of developing and standardising mobile phone operating Systems. The “EPOC” OS currently under development by...
An addressing method for specifying the numerous resources on the Internet in a uniform manner. A URL is indicated in the format: “protocol name” ://”host name”/”file name”. For example “http://www.nokia.com/3g/index.htm I” indicates the “3g index.html file” saved in the www server operating under the host name “nokia.com”.
USIM Universal Subscriber Identity Module (Universal SIM). An upgrade of the SIM card (generally used under GSM) to enable use with IMT-2000. US-TDMA/1S 36 A second generation system used in the US. Also referred to as D-AMPS (Digital AMPS). First digital system adopted in the US and covers the entire country.
Internet communications and advanced telephony services on digital mobile phones, pagers, digital assistants and other wireless terminals. The WAP Forum was established in 1997 by Nokia, Ericcson, Motorola and Unwired Planet (now Phone.com). Its current members comprise over 200 leading firms in the wireless communication field.
The Extensible Markup Language (XML) is a format for structured documents and data. It was developed by the World Wide Web Consortium (W3C). XML is a meta-language, i.e. content is not directly encoded in XML but in a specific markup language defined using XML It corresponds to the successor language for the current HTML.
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