- Digital Videos Broadcasting via Satellite – Challenge on IPTV Distribution. - Digital Video Broadcasting via Satellite (DVB-S) is achieving its new order. - One-way downlink is transmission from satellite to customer location and others media transmission for uplink from customer to the internet. - For high humidity area, such as Asia, it is wise to use C-Band frequency as its downlink transmission. - On the other hand, European countries will be effective to use Ku- Band frequency, otherwise the services can not be delivered on maximal standard.. - DVB-RCS Network Architecture (Helmut, rklin et al. - Because IPTV can be broadcast on the internet protocol, then every media that is capable to communicate using internet protocol is also the media of IPTV distribution. - And their invention makes a big leap of telecommunication technology, especially how people communicate on low cost (Alberto, Francesco et al. - This chapter will be organized as follows. - to IPTV distribution is explained. - Then on Section 4, the challenge of IPTV distribution over DVB-S will be given and Section 5 concludes the chapter.. - Digital Video Broadcasting via Satellite (DVB-S) has been served more than a decade. - Since its introduction, DVB has been used on terrestrial (DVB- T), cable (DVB-C) and satellite (DVB-S) (Helmut, rklin et al. - DVB Return Channel via Satellite (DVB-RCS) is established as the answer of demand of Internet technology via satellite. - DVB-RCS provide a new era of IP relay via satellite. - This breakthrough is bringing good news to the internet providers company. - The development of internet protocol of version 4 (IPv4) for satellite communication had been established since the introduction of DVB-S (Helmut, rklin et al. - Multicast communication is predicated on the need to send the same content to multiple destinations simultaneously. - User management on multicast transmission is using the MAC address of the receiver.. - How this protocol satisfied their consumer by carrying IPTV on its transmission will be answer on the following pages.. - A set of international standards for digital TV has been developed to follow up on the demand of the digital video quality standard by the DVB Project. - It is an industrial consortium with about 300 members and published by a Joint Technical Committee (JTC) of ETSI, CENELEC and European Broadcasting Union (EBU). - it’s have to be exactly the same as setup on the receiver. - If this parameter has been setup not properly, then the transmission could not be seen on the screen. - Technically it is called the out of tuned condition. - Afterwards, the receiver will extract streams from the TS partially by looking the same PID existed on the packet.. - MPE is used to transmit datagram that exceed the length of the DVB packet size.. - IPTV distribution on DVB-S. - The two basic types of multicast distribution trees provided for IPTV distribution are source trees and shared trees(O’Driscoll 2008). - A source tree is based on the principle of identifying the shortest path through network from source to destination. - Due to the fact that source trees identify shortest path, they called shortest path trees (SPT). - A new source tree is generally configured when new source servers are added to the IPTV network as can be seen on figure 8. - The configuration of a shared three is different to a source tree in the sense that the shared multicast distribution locates the root at a chosen point on the network called a rendezvous point (RP). - This contrasts with source trees that locate their routes at the source of the IPTV content. - To deal with this problem, we propose the cache stream management that provide IPTV streams management on one-way DVB-S environment.. - Indeed, it is a simple solution for IPTV distribution over DVB- S. - The CSM consists of grid computing facility which is doing request analyzes, and then makes a schedule for each request specifically to the cache manager.. - In this chapter, IPTV distribution is only cover single source downlink via satellite and uplink via local network. - The local network capacity is considered fulfil the request signalling to the IPTV provider, besides cost for stream uplink via satellite is very expensive.. - Gotta(Alberto, Francesco et al. - 2006), shows the output of their experiment on figure 9 using a single channel transmission delay via satellite. - The response to an offered traffic impulse is a throughput transient with amplitude Rmin lasting for Ta, followed by a throughput transient with amplitude R + Rmin ending at Tt, after which the throughput is equal to the offered traffic. - The duration of the throughput transient Tt depends on the impulse amplitude. - In fact, the moment the source starts sending packets at rate R, the service rate allocated to the TT is Rmin, meaning that the queue at the TT fills up at a rate R − Rmin. - The queue length reaches its maximum Ta(R − Rmin) after a time equal to the allocation delay Ta. - Since the total duration Tt of the transient is the sum of the allocation delay and the time required to empty the queue.. - Their result shows the need of CSM to be implemented on IPTV distribution via satellite.. - Throughput and one-way delay (Alberto, Francesco et al. - Challenge on IPTV distribution. - While delay, it is can not be anticipated on current satellite technology.. - Cache Stream Management. - request in particular will be check to the availability on Cache Array Manager (CAM), if the request is match then the content will be delivered based on the cache source. - If it is not, then distribution manager will retrieved the data from source. - This happen based on the capability of those both technologies to deliver a multicast session without significant delay. - But to the satellite technology, cache system is playing a vital role on stream delivery.. - Cache Stream Management Implementation.. - The Cache Receptor is acting like a grid computing storage system. - If there is no request then the content will be record as there are no content send to the Delivery Control.. - It will checking for a request whether it is exist on the cache request or not, if it is exit then the Cache Receptor will send that request via delivery control. - The Cache Array keeps updating its content information database by Cache Receptor. - The Content Distributor which is functioning as a distributor mechanism manager will arrange the allocation bandwidth. - It will manage the change of the channel that is requesting by end user. - If a specific channel is highly demand by user then the Content Distributor will allocate that particular channel with higher bandwidth and priority. - Cache Receptor and Cache Array. - The Cache Array in this configuration is working as the Cache Manager, it manage the incoming request by updating the Content Manager to release every available channel by checking its availability to Data (Database Storage).. - For short time, the content will be send to the user via the Content Manager if it is tagged live streaming by cache manager and will keep stream until the Cache Manager inform the Content Manager to stop. - If a stop signal is given to the Content Manager by the Cache Manager, then that particular channel will be saved on video storage. - On this state the Content Manager will retrieve all its content from storage array that represent by Outgoing Video, Video Storage and Data.. - To handle this condition the Content Manager can not working on a single queue mechanism. - It must be managed into array system which will be effectively transfers channels on it services.. - Each user would be request via local network whether the contents are ready on the cache system. - If it is not available then the request will be passed through the router. - The router will contact the IPTV head operation channel system to send their specific request channel via satellite.. - In this chapter, we already propose our design of Cache Stream Manager as a solution to IPTV distribution technology via one-way satellite communication. - The Cache management is the main agenda which was resonance by this chapter. - And user interaction will be sends to request control that manage every request if the demand is not exist on the cache array.. - Francesco, et al. - 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