of it) and L (1.452-1.492 GHz) frequency bands. DVB-H supports 5, 6, 7, and 8 MHz channel bandwidths. The most common frequency range is 470-476 MHz corresponding to UHF channels 21-55. The lists of some key DVB-H attributes are shown in Table 9.4. 9.12.2.2.1 DVB-IPDC To deliver services to the end-user terminal, more system components besides the physical layer are needed to build a complete end-to-end system. For this purpose, the DVB project created a set of system layer specifications called IP Datacast (IPDC). IPDC specifications completed in 2006 describe the essential components required to deploy a commercial mobile television service based on IP (Internet Protocol). These specifications were originally designed for use with the DVB-H physical layer, but that will likely be used as a higher layer for all DVB mobile TV systems, including DVB-SH (DVB-Satellite Handheld) [16,20]. Figure 9.12 shows the IP Datacast reference architecture. The left hand side depicts the creation of the content that is to be delivered to the terminal which is shown on the right hand side. A service application is introduced, offering a logical link between the content provider and the end user terminal. This enables the content to be delivered to the terminal over different radio access technologies, like DVB-H or UMTS. The service application provides the Electronic Service Guide (ESG) to the terminal and the user who can select the services he/she wishes to consume, independently of the bearer network over which they will be delivered. The service management is in charge of allocating transmission resources for the different bearer technologies. Additionally, together with the service application it performs the billing of the services consumed by the end users. Within the IP Datacast specification, all reference points of the air interface have been specified in detail, ensuring full interoperability between terminals and DVB-H transmission equipment from different vendors [21]. IP Datacast makes DVB-H an end-to-end broadcast