Explore on Application of BDS-3 RSMC in the Field of Image Transmission

As a core of the national spatial-info assets, the BeiDou satellite navigation system (BDS) has a unique function is short messages, it is different from GPS, GLONASS and other global navigation satellite systems (GNSS). In the white paper, the regional short messages communication (RSMC) has reached 1,000 Chinese characters per slot (or 14k bits per slot), and the system capacity has been increased to 10 million times per hour. For BDS-3 RSMC service, this paper proposes an engineering scheme of image transmission and processing based on “cloud-edge-end”, and via simulation verification, it is found that for high-definition (HD) images with a resolution of $1024\times 768\mathrm{p}$, H.265 and proposed compression method compares the average data, compression ratio, standard deviation, subjective evaluation and time and other indicators, and finally verifies that the RSMC can realize high-definition image transmission under the VP8 compression coding condition. The engineering scheme of “cloud-edge-end” is feasible. To this point, the RSMC will have the ability to escape the scope of text and audio in real-time. At the same time, the improvement of its coverage and system capacity will also increase the worth of the BDS-3 RSMC image transmission, and further improve the communication on transportation, emergency and other fields.