Regenerative Satellite Mesh - A Air Interface
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Regenerative Satellite Mesh - A Air Interface (RSM-A) is an internationally standardized satellite communications protocol by Telecommunications Industry Association and European Telecommunications Standards Institute.
It is based upon the SPACEWAY Ka-band communications system developed by Hughes Network Systems. It is expected to be utilized by the Hughes Network Systems satellite called SPACEWAY-3.
The standard is meant to provide broadband capabilities of up to 512 kbit/s, 2 Mbit/s, and 16 Mbit/s uplink data communication rates with fixed Ka-band satellite terminal antennas sized as small as 77 cm.
The standard consists of the following documents:
- TIA-1040.1.01 Physical Layer Specification; Part 1: General Description
- TIA-1040.1.02 Physical Layer Specification; Part 2: Frame Structure
- TIA-1040.1.03 Physical Layer Specification; Part 3: Channel Coding
- TIA-1040.1.04 Physical Layer Specification; Part 4: Modulation
- TIA-1040.1.05 Physical Layer Specification; Part 5: Radio Transmission and Reception
- TIA-1040.1.06 Physical Layer Specification; Part 6: Radio Link Control
- TIA-1040.1.07 Physical Layer Specification; Part 7: Synchronization
- TIA-1040.2.01 MAC/SLC Layer Specification; Part 1: General Description
- TIA-1040.2.02 MAC/SLC Layer Specification; Part 2: SLC Layer
- TIA-1040.2.03 MAC/SLC Layer Specification; Part 3: ST-SAM interface
[edit] General Description
The standard describes the various segments involved in a RSM-A satellite system including:
- Satellite Terminal: fixed satellite terminal for satellite communication linked to terrestrial hosts via connected LANs
- Satellite Payload: geosynchronous regenerative satellite payload and antennas
- Network Operations Control Center: involved ground network management and resource management
The uplink consists of a Frequency Division Multiple Access Time Division Multiple Access (FDMA-TDMA) where individual uplink spotbeams are assigned frequency channels out of the satellites frequency band. Satellite Terminals transmit on timeslots on its uplink beam's frequency channels using mechanisms such as Bandwidth-on-Demand (BoD) protocols with the Satellite Payload.
The downlink consists of a Time division multiplex (TDM) carrier bursts directed in a hoping fashion to different downlink beams each downlink frame timeslot. The downlink beams can be narrow downlink spotbeams during the point-to-point transmission part of each downlink frame or they can be downlink shaped beams that cover a much larger geographic area during the shaped beam transmission part of each downlink frame.
