displaying content continuously. In other words, the time between bursts gives the power saving (off-time). Moreover, time slicing offers, as an extra benefit, the possibility of using the same receiver to monitor neighbouring cells during the off-time. 12 Mbit/s PSI/SI signalling (continuous) Figure C.3 Time slicing (PSI, program specific information; SI, service information) DVB-H Introduction DVB Multiplexer -For LP MPEG-2 MPEG-2 TV Service IP-backbone DVB-H IPE -Time Slicing -MPE-FEC DVB-T Tx -DVB-H signalling required -8k or 2k in existing nw Figure C.4 DVB-H services in the existing DVB-T network with multiplexing MPE-FEC for Performance MPE-FEC stands for multiprotocol encapsulation forward error correction and is applied on the IPv6 packet level in order to: add impulse noise protection; enable higher speed terminal movement. The main characteristics of this coding scheme are the following: additional data link layer Reed-Solomon (RS) coding for IP datagrams; IP data are filled in the vertical direction; the table is padded; RS code words are calculated in the horizontal direction; RS columns are formed in the vertical direction; data are transmitted in the vertical direction as MPE and FEC sections. Regarding the frame structure, the practical MPE-FEC consists of 256, 512, 768 or 1024 rows and constant 255 columns, divided into 191 columns of IP data and the remaining 64 of parity bytes. Different sizes of MPE-FEC frames are needed for optimal planning (number of services, capacity of each service, time slicing on/off times, etc.) and the maximum buffer size for the frame is approximately 2 Mbit (1024 X 255 X 8). C.6.5 DVB-T and DVB-H Coexistence Since DVB-H is fully compatible with the DVB-T standard, the possible deployment scenarios foresee network sharing. The first scenario proposes the introduction of DVB-H services in the existing DVB-T network with multiplexing, with the mandatory support of portable indoor reception provided by the DVB-T network, as shown in Figure C.4. A second possibility migh