  The integration between the satellite network and the terrestrial network
will play a key role in the upcoming sixth-generation (6G) of mobile cellular
networks thanks to the wide coverage and bandwidth offered by satellite
networks. To leverage this integration, we propose a proactive traffic
offloading scheme in an integrated multi-satellite terrestrial network (IMSTN)
that considers the future networks' heterogeneity and predicts their
variability. Our proposed offloading scheme hinges on traffic prediction to
answer the stringent requirements of data-rate, latency and reliability imposed
by heterogeneous and coexisting services and traffic namely enhanced mobile
broadband (eMBB), massive machine-type communications (mMTC) and ultra-reliable
low latency communication (URLLC). However, the fulfilment of these
requirements during offloading in dynamic IMSTN comes at the expense of
significant energy consumption and introduces inherently supplementary latency.
Therefore, our offloading scheme aims to balance the fundamental trade-offs
first between energy consumption and the achievable data-rate and second
between energy consumption and latency while meeting the respective needs of
the present traffic. Our findings prove the importance of the cooperation
between the multi-satellite network and the terrestrial network conditioned by
traffic prediction to enhance the performance of IMTSN in terms of latency and
energy consumption.
