Efficient Validation/Verification of a Robust DVB-H Link Layer

Abstract

Abstract-Currently, various semiconductor manufacturers develop silicon solutions for DVB-H receivers. One of the key functions in a DVB-H receiver is the link layer. In order to differentiate, manufacturers can choose between basic or advanced link-layer implementation concepts, resulting in modest or excellent performance. This paper presents the required validation and verification tools for evaluating the DVB-H link-layer robustness, capable of generating and analyzing extreme signal conditions. Furthermore, we also discuss an advanced analysis tool required to inspect the output IP-based data, Service Information and Program Specific Information of the link layer. The earlier simulation results for improved link-layer performance presented by the tools are validated from a newly developed silicon implementation.

IP-recovery in The DVB-H link layer for TV on Mobile

“…The first two reception situations correspond to the presence and absence of an MPEG-2 TS packet, whereas in the last reception situation, the received MPEG-2 TS packet is present, but has its Transport Error Indicator (TEI) flag set to unity, indicating that the channel decoder FEC could not correct this packet. In DVB-H, the link-layer FEC can benefit from this additional information for enabling the trade-off between hard-and soft-erasures prior to FEC, as indicated by Equation (1), see [15]. The 2-bit erasure information is stored in the erasure flag memory, which can be regarded as a LookUp- Table (LUT). For each MPE-FEC symbol constructing the MPE-FEC table, 2-bit erasure information is generated by the IP deencapsulation filter chain.…”

“…Verification and validation of an embedded DVB-H link layer requires a dedicated data generator and a corresponding I SYMBOL RECOVERY IN DEFECT MPE-FEC FRAME USING 2-BIT ERASURE INFORMATION IN COMBINATION WITH THE INFORMATION FROM THE CORRECTED ROW INDEX TABLE 2-bit erasure flag Corrected Row Index Table ( data analyzer [15]. This tool set is also used to simulate the IP recovery performance, prior to an actual DVB-H link-layer implementation.…”

“…The IP recovery depicted in Fig. 13 is obtained by comparing the actually received IP datagrams with the expected amount of IP datagrams using the analyzer described in [15]. For the situation that all expected IP datagrams are received, the normalized recovery rate becomes unity, which means that an erroneous MPE-FEC frame can be successfully corrected by the link-layer FEC.…”