  Smart grid is an energy network that integrates advanced power equipment,
communication technology and control technology. It can transmit two-way power
and data among all components of the grid at the same time. The existing smart
grid communication technologies include power line carrier (PLC)
com-munication, industrial Ethernet, passive optical networks and wireless
communi-cation, each of which have different advantages. Due to the complex
application scenarios, massive sampling points and high transmission
reliability require-ments, a single communication method cannot fully meet the
communication re-quirements of smart grid, and heterogeneous communication
modes are required. In addition, with the development of cellular technology,
long term evolution (LTE)-based standards have been identified as a promising
technology that can meet the strict requirements of various operations in smart
grid. In this paper, we analyze the advantages and disadvantages of PLC and LTE
communication, and design a network framework for PLC and LTE communication
uplink heteroge-neous communication in smart grid. Then, we propose an uplink
scheduling transmission method for sampling data with optimized throughput
according to the requirements of system delay and reliability. Then, we use the
formula deri-vation to prove the stability and solvability of the scheduling
system in theory. Finally, the simulation results show that under the condition
of satisfying the de-lay requirement, our proposed framework can optimally
allocate the wireless communication resource and maximize the throughput of the
uplink transmission system. Keywords: smart grid, heterogeneous communication,
optimized throughput.
