A Study on Network Operation Structure and DataLink Protocol for Interworking of Ground Network ALL-IP at Next-Military Satellite Communication

차기군위성통신에서 지상망 ALL-IP 연동을 위한 네트워크 운용구조 및 데이터링크 프로토콜 연구

Abstract

The military satellite communication of ROK military, ANASIS is designed for analog data such as voice and streaming data. ANASIS cannot fully support ALL-IP communications due to its long propagation delay. The next generation satellite communication system is being designed to overcome the limitation. Next generation satellite communications system considers both high-speed and low-speed networks to support various operating environment. The low-speed satellite supports both broadband and narrow-band communication. This network works as the infrastructure for of wide-area internetworking over multiple AS's in the terrestrial network. It requires minimum satellite frequency and minimum power and works without PEP and router. In this paper, we propose a network operation structure to enable the inter-operation between high and low-speed satellite networks. In addition, we propose a data link protocol for low speed satellite networks.

Fig. 1. Broadband communication

Fig. 4. ANASIS satellite frequency operating method

Fig. 5. DVB-S2/RCS system^[15]

Fig. 6. Systems running on DVB

Fig. 7. DVB network structure^[10,11]

Fig. 8. NCW network in US army

Fig. 9. MF-TDMA frame structure

Fig. 10. WIN-T 3Layer routing architecture

Fig. 11. Satellite PHY layer

Fig. 12. Relay network of IP data

Fig. 13. Protocol conversion for traffic channel

Fig. 14. Narrowband satellite network structure

Fig. 15. Single network/multi network structure

Fig. 16. Network structure in single network

Fig. 17. Wide area single network^[16]

Fig. 18. Hub/Spoke network in a single network

Fig. 19. Mesh network in a single network

Fig. 20. Network structure in multi-network

Fig. 22. Operating network operation(example)

Fig. 23. IP packet processing flow in multi-network

Fig. 24. Router interworking in multi-network structure

Fig. 25. Switch interworking in multi-network structure

Fig. 27. Data link protocol frame structure

Fig. 28. Protocol header description

Fig. 29. IP packet flow at the terminal

Fig. 30. PDU format 1 – SDU only

Fig. 31. PDU format 2 – SDU fragmentation start

Fig. 32. PDU format 3 – fragmentation continue

Fig. 33. PDU format 4 – SDU fragmentation end

Fig. 34. PDU format 5

Fig. 36. PDU format 7

Fig. 37. PDU format 8

Fig. 38. Packet fragmentation algorithm

Fig. 39. Data integrity algorithm through FSN/SSN

Fig. 40. Fragmentation combining algorithm

Fig. 41. Satellite data link protocol test bed

Fig. 42. 128 kbps / 64 byte IP packet throughput

Fig. 43. 128 kbps / 1500 byte IP packet throughput

Fig. 44. 256 kbps / 64 byte IP packet throughput

Fig. 45. 256 kbps / 1500 byte IP packet throughput

Fig. 46. 128~512 kbps / 64~1500 byte IP packet receive rate

Fig. 47. Packet receive rate graph by data rate

Fig. 48. Packet receive rate graph by packet size

Fig. 49. Wide area network with ALL-IP in singlenetwork / multi-network structure^[19]

Fig. 2. ANASIS terminal

Fig. 21. Wide area multi-network^[16]

Fig. 26. PC(Terminal) interworking in multi-network

Fig. 35. PDU format 6

Fig. 3. Satellite control center

Table 1. Simulation parameters

Table 2. Packet transmission rate table by data rate

Table 3. Packet transmission rate table by packet size