Is there a solution to the return link dilemma?

Wednesday 23 March 2016
Is there a solution to the return link dilemma?


Updated: April 19, 2016

Typically we resort to one of two return technologies, opting for either MF-TDMA — which typically targets applications with bursty and potentially over-booked traffic services, such as Internet access for consumers and private SME, B2B and SCADA networks — or SCPC, which has more applicability in high data and video rate return links.

This also means that a large section of the market is caught up in the SCPC versus MF-TDMA dilemma.

At Newtec we identified the need for a link return technology that can combine the benefits of MF-TDMA and SCPC in a single technology suited for the plethora of applications. This technology is called Mx-DMA®. 

You can see Mx-DMA live in action at NABShow 2016, book your demo now

Five reasons to select Mx-DMA
  1. Industry leading efficiency: Newtec Mx-DMA benefits: efficiency
    Optimal modulation techniques
  2. Real-time dynamic bandwidth allocation: Newtec Mx-DMA benefits: dynamic
    On-demand and seamless carrier resizing
  3. Highest availability at minimal cost: Newtec Mx-DMA benefits: availability
    Advanced adaptive power and bandwidth allocation
  4. Lowest terminal CAPEX and size requirements: Newtec Mx-DMA benefits: CAPEX & size
    Unique power and regrowth management
  5. Unmatched operational simplicity: Newtec Mx-DMA benefits: simplicity
    Automated carrier planning and link budgets
Mx-DMA for Techies

Let’s start with a definition: 

Mx-DMA = Cross-Dimensional Multiple Access technology

Mx-DMA cross-correlates and assigns in real-time: return frequency plan, symbol rate, modulation, coding and power based on return traffic demand, QoS management and channel conditions simultaneously for all terminals in the network. With each carrier assigned to just 1 terminal, highest return SCPC-like efficiencies are achieved while maintaining the flexibility of MF-TDMA.

A couple of things are worth noticing:
  • Cross-correlation:
    A Newtec scheduler looks at the whole of the return carrier population and determines the best means of transmitting each carrier
  • Real-time:
    Carrier planning assigned over the return carriers will continuously adjust itself in real time
  • Based on return traffic demand:
    When having a demand for more traffic in the return channel, the requesting terminal will automatically be assigned more space capacity
  • QoS management:
    Effectively take advantage of statistical multiplexing and effectively overbook the return channels by having QoS in the return channels individually and also over the complete return channel pool
  • Channels conditions:
    ACM is nothing new, even for return channels. But when applying Newtec’s FlexACM to certain return carriers that require it (by giving them more space capacity to maintain their SLA) in combination with statistical multiplexing, one can truly do ACM and at the same time stick to the SLA without the need for extra buffer capacity
  • Each carrier is assigned to just 1 terminal:
    Each terminal gets its own dedicated SCPC return channel. Hence the SCPC efficiency so no need for guard times between “bursts”. There are no bursts, the carrier is always there. It simply continuously adjusts all transmit parameters (like symbol rate and frequency). 
Book your demo to see Mx-DMA live in action!