Dvb-h Data Link Layer Fec And Soft-switching Algorithm

Getting live TV to a small battery-powered handheld device is quite a challenge. A number of competing technologies are positioning themselves to offer such a service in the coming year. Whilst the main novelty offered by Broadcasting to Handhelds (BTH) is likely to be perceived as "TV on a Mobile", many additional services will benefit from the growing functionality of digital broadcast technology. Broadcasting to Handhelds can be a stand-alone receive-only service but can also make use of the functionality of mobile phones and broadcast receivers to enable truly interactive services.Worldwide, a number of different technical systems have been designed to deliver broadcast content to handheld devices,leading one is DVB-H which offer a truly "broadcast" approach - where a transmitter has a potentially unlimited number of simultaneous receivers. DVB-H, which is an amendment of DVB-T, offers reliable high data rate reception for mobile handheld and battery-powered devices.This paper mainly discusses the link layer of DVB-H with error correction which was defined to work on top of the DVB-T physical layer;and the soft handover based on TimeSlicing.The DVB-H standard suggests to use Reed-Solomon coding combined with CRC-32 error detection as the link layer FEC. This paper investigates the performance of the proposed error correction scheme, which is first analyzed theoretically and then by computer simulations, and then propose an efficient method to get the erasure information for the RS decoder in MPE_FEC decoding. Results are compared to conventional Reed-Solomon decoding with utilizing CRC-32 error detection to illustrate the erasure information in DVB-H standard.Time Slicing is the most important technology, it can save the power. This paper cionsiders how Time Slicing can be utilized in implementing soft handover in a DVB-H receiver. An algorithm for sotf handover is proposed and evaluated.