Cellular TV could be viewed on a good or 3G cell phone, such as the LG Vu or Samsung SCH u620 clever phone. Both AT&T Wireless and Verizon Instant offer portable TV services. For Verizon, it's VCAST TV and for AT&T, it's AT&T Cellular TV. Both AT&T and Verizon Portable TV use MediaFLO technologies from Qualcomm to broadcast the VHF (719 MHz Center frequency) electronic TV signals to the mobile phones. Cellular TV service from various carrier bunch various pair of TV programs in their broadcast (in the product range of 10 to 12 TV programs in a fundamental package).
Mobile TV support does not utilize the mobile phone system to transmit the TV signals. Instead, it runs on the separate system to deliver, broadcast and transmitted the TV signs to the mobile phones. It only employs the cell phone network to offer interactivity and user authorization with the TV company provider. Considering that the 3G cell phone network from AT&T and Verizon are both capable to carry IP traffic, it appears to be obvious that the easiest IPTV implementation for cellular TV is using IPTV. A good example is AT&T previously applying IPTV in their U-verse support (internet, phone and TV).
To understand why cellular TV does not use IPTV, the unicast nature of the cell phone system must be explained. The existing 3G (UMTS, EVDO) cellular phone system are created to bring unicast traffic just, i.e. point out stage relationship needs to be create between an individual and the Media machine for the network to deliver the TV traffic to the mobile phone. Because TV is just a transmitted company, i.e. a point to multipoint relationship is required for portable TV service. To implement point to multipoint connection, the cell phone network needs to create an IP connection involving the Press server and each portable individual getting the broadcast simultaneously. These many associations will quickly overrun the capability of the mobile phone network and prevents other voice and information traffic that needs to utilize the network.
For mobile TV to use IPTV, the IP multicast feature must be executed on the mobile phone network. Multicasting is the technique of transmitting just one video signal concurrently to multiple end users. All visitors obtain exactly the same signal at the same time but there are number separate revenues (connections) for each recipient. IP multicast is widely found in the distribution of broadcast TV solutions around IP networks. It considerably reduces the total amount of bandwidth necessary to send high quality IPTV content across a network. The reason being merely a single copy of each and every video stream must be sent to a router, which often makes a replicate of the supply for the requesting devices. Not only does multicast decrease the bandwidth requirements of the system however the control power of the Media machine can be kept somewhat minimal because it just directs one duplicate of an IPTV stream at a time.
