Handover in DVB-H: Investigation and Analysis by Xiaodong Yang
By Xiaodong Yang
“European has already constructed winning criteria long ago, and i'm very con?dent that at the foundation of DVB-H, cellular television companies can developtheeconomiesofscaletheyneedfortake-upacrossEuropeandaround the world,” With those phrases of EU’s Telecom Commissioner Viviane Reding, DVB-H is destined to be a dominating cellular television expertise in Europe or even on this planet. i used to be ?rst getting into contact with the DVB expertise whilst i used to be doing my PhD examine in Brunel collage in united kingdom in 2002. at the moment DVB-T used to be already a mature and universal electronic broadcast expertise and somebody may well simply purchase a DVB-T receiver out there to attempt the electronic broadcast indications which have been already broadcasted in united kingdom due to the fact 1998. Then the DVB expertise international replaced dramatically. As a extra ?exible and strong terr- trial broadcast method focusing on handsets, DVB-H was once built in line with DVB-T. In 2003 the DVB-H group have been continually operating to ?n- ize the traditional. ultimately in November 2004 DVB-H was once followed as an ETSI regular EN 302 304. i used to be fortunate to work out some of these alterations whilst i used to be doing my PhD study in DVB expertise. and that i used to be very proud to be considering the di?erent DVB-H examine tasks because the starting of the DVB-H general improvement degree. i used to be additionally fortunate adequate that i'm one of many ?rst people who ?nished PhD measure via targeting DVB-H learn.
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Extra info for Handover in DVB-H: Investigation and Analysis
Sample text
Some research has been done about handover in multi-frequency cellular structured DVB-H networks [68, 104]. Handover in traditional cellular telecommunications networks (like GSM) refers to the mechanism that transfers an ongoing call from one cell to another as a user moves through the coverage area of the cellular system [38] and has long been a research topic. However, handover in DVB-H refers to the switching of the reception of IP based services from one transport stream to another when the terminal moves through the coverage area of a DVB-H network [67].
It must be noted that the handover categories may overlap. For example a soft handover can be both a service handover and an active handover at the same time. 2 Approaches There are different ways to address the handover problem in DVB-H. Some of the handover algorithms in other networks, such as the handover in telecommunication networks and the handover in mobile IP network, can even be borrowed and taken as a reference in the DVB-H networks. The handover issue for DVB-H in this book is approached from two aspects: the handover stages of a DVB-H handover and the handover challenges that need to be addressed for a DVB-H handover.
It is: 1. IP/MAC Notification Table (INT) • The main function of the INT table is to make the DVB system more suitable for IP stream based signalling. The INT describes the availability and location of IP streams within a DVB MPEG2 transport stream. Thus the INT tables are important in the DVB-H handover execution stage for the receiver to synchronize to the targeted IP streams. Since the PSI/SI tables are transmitted within the transport stream in the DVB-H networks, in order to discover and consume the service, the DVB-H 48 4 DVB-H Signalling Information receiver must implement the PSI/SI tables according to [87] during the receiver design.