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Standards Development
The scope of this proposal is to define a new mode, working title “mode Z”, consisting of free-of charge, well-proven technologies, to enable future use cases as determined by the ad hoc group ART at lowest possible Total Cost of Ownership.
The proposed technologies are limited to:
- GMSK modulation
- Narrowband transmissions
- Forward error correction methods
- Multi-channel operation
The motivation of the mode is to provide a free-of-charge upgrade of the wM-Bus standard, EN 13757-4. The proposal for mode Z (working title) has been presented to the ad-hoc group ART (alternative radio technology) as a new mode providing a response to the identified ad hoc group ART future use cases and gaps, which include the need for cost effective and efficient two-way configuration and operation of end-devices, such as meters, sensors or valves. The proposal is designed to yield improvements both for local network access points (LNAPs) and for neighbourhood network access points (NNAPs). Some of the elements can be introduced in the standard in a way that the existing modes (i.e. mode C, T or N) could benefit from these elements. Analysis of coexistence with existing modes should be performed during the work in the WG. Retrofit on existing meters by software can be possible under certain conditions. Details can be found in the attached assessment report, that provides results of the assessment criteria defined by the ad hoc group ART.
Mode Z provides a free-of-charge pathway to obtain:
• One common low software complexity meter implementation independent of network topology (LNAP/NNAP).
• Reliable data delivery enabling future use cases, due to higher robustness obtained by FEC and frequency agility.
• Increased link budget for decreased infrastructure cost (NNAP) and improved communication stability (NNAP and LNAP), thereby decreasing Total Cost of Ownership.
Basing the proposal on free-of-charge, well-proven technologies that enable simple end-points similar to existing modes, this proposal supports the continuation of the wireless M-Bus standard being widely accepted in the market.
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