Page 21 - Use cases and requirements for the vehicular multimedia networks - Focus Group on Vehicular Multimedia (FG-VM)

of networking technologies, online radio and audio/video entertainment services in intelligent
connected vehicles are becoming more and more popular.
On one hand, traditional one-way broadcasting systems, i.e., FM/AM, terrestrial digital broadcasting,
and satellite broadcasting, only support one-way transmission mode. Hence, interactive and
personalized services can hardly be achieved by such broadcasting networks.
On the other hand, mobile networks support two-way transmission modes. By using mobile network,
online multimedia entertainment services can be provided to users to satisfy interactive and
personalized demands. However, there are three drawbacks:
1) In certain situations, the cost of mobile Internet is an important factor impeding the wide
deployment of VMNS in intelligent connected vehicles.
2) The wireless coverage of mobile networks is not fully guaranteed. For example, the signal
strength can be limited or non-existent in certain locations, and, therefore, users may
experience a poor connection and experience when at those locations.

3) The mobile network can be congested, which impacts the smoothness of online audio/video
playback and degrades the user experience.

7.2.1.1 Converged network empowers migration to more advanced services

Network convergence transmission takes advantage of the complementary strengths of broadcasting
and mobile Internet infrastructures to overcome their limitations. Based on the converged network
transmission channels, the rich media contents and information can be delivered to all kinds of
terminals in an efficient and timely manner, i.e., intelligent connected vehicles, personal mobile
terminals, etc.

The VMS retrieves rich media contents from a VMSP through various networks and serves as a local
infotainment centre. The VMS can not only play the contents locally on the built-in vehicle screens
and speakers but can also share the contents with passengers’ personal devices (for example,
smartphones and tablets, using in-vehicle Wi-Fi connections).
The VMS seamlessly integrates the services received from various broadcasting networks and
bi-directional networks. In particular, when the VMS is in-coverage of multiple broadcasting
networks, it could intelligently select one of the broadcasting networks to receive the service. Such
choice can be made based on various factors, such as network signal strength, terminal processing
power, cost, etc.

7.2.2 Use-cases

7.2.2.1 Use case A – In-city commuting/native life service as driving purpose
1. Satisfy the needs of personalized and two-way interactions.
2. Provide undegraded quality of service (QoS) for audio/video streaming services.
The coverage of cellular mobile network in densely-populated city areas is fairly good. However, as
more and more users are trying to access the cellular mobile network, the connection speed for each
user becomes lower and lower. In such a case, mobile Internet by itself could not satisfy the user
experience.

7.2.2.2 Use case B – Out-city driving

Traveling for long distances away from cities using family cars or SUVs during weekends or holidays
becomes a common trend. In some regions, large population lives outside of the cities and using a
vehicle is a necessity. In environments such as mountain valleys, forests or deserts, the mobile
network coverage could be much poorer than in cities, which in turn cause the degradation of
multimedia services.

FGVM-01R1 (2019) 11