MAMBO Demonstrator
The system allows the management of compressed digital services while maximising bandwidth capacity and at the same time maintaining quality. At the heart of the system is the Multiplexing Kernal. This can multiplex all kinds of services such as digital video broadcasting (DVB) and internet protocol (IP) and generate the DVB or IP bouquets according to the available bandwidth. This is installed at service provider level by the interconnection of various modules to the system. The final configuration of the MAMBO system involves the integration of end user equipment and of wireless access network. The IP interconnections between the system modules have been divided into two sub-networks. The Signalling/ Data Subnet (SDS) conveys signalling and management information along with IP traffic for the end users, and the Streaming Video Subnet (SVS) is dedicated to video transport. For the integration of end user equipment and wireless access network, a PC is used to provide the user-to-service interface in order to meet the requirements such as surfing the Internet. Appropriate software must also be installed to provide a downlink for DVB signals. Interactivity with the system is achieved using a GSM mobile phone and the GSM network. The mobile phone is controlled by software installed in the PC, and the return channel is IP based and is connected to a specific address by dialling the appropriate ISDN number. The system is scaleable, that is it can support as many users as the bandwidth restrictions and required quality can permit. Operators of this service are able to select specific services of interest and re-multiplex them to create a new multiplex while optimising bandwidth for delivery of additional services.
