1. Reliable and Efficient Transmission to M2M Device Groups
Document Number:
IEEE S802.16p-10/0002
Date Submitted:
2010/11/01
Source:
Hung-Yu Wei, Ching-Chun Chou
National Taiwan University (NTU)
Yan-Xiu Zheng
ITRI
*<
Re:
CfC: SRD of the IEEE p Mobile-to-Mobile (M2M)
Base Contribution:
IEEE C802.16p-10/0002
Purpose:
To be discussed and adopted in the p M2M SRD
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2. M2M Applications M2M applications include [2]
Smart metering
Health monitoring
Vehicular
Maintenance
Some application cases & related requirements
Simultaneous transmissions of different traffics
Devices with limited power
High reliability transmission

3. Simultaneous Transmission of Different QoS Traffics
M2M devices may be transmitting traffics of different QoS requirements.
Smart metering
Power outage notification
User electricity consumption profile
Health monitoring
Vital problem warning
Your walking distance
Prioritized transmission is required
Pre-emption is required for critical traffic
Consider delay & reliability

4. Devices with Limited Power
Most mobile devices are powered by batteries.
Hand-held devices
Sensors, public monitoring devices
Energy saving is necessary
MAC protocol should be integrated with power saving mechanism
To maximize power saving
Efficient energy saving protocol
For delay tolerant traffic

5. High Reliability Transmission
The integrity of critical control message or data should be ensured.
Public warning devices & signals
Emergent reporting for the M2M consumers
Feedback is necessary to ensure the transmission and reception.
HARQ with ACK/NACK
Fountain codes, network coding

6. Proposed Text to the IEEE 802.16p M2M SRD (1)
6.2.4 The p system shall support optimized signaling for resource allocation for large numbers of M2M devices individually or by group.
Pre-emptive resource allocation should be provided if emergent signaling or data delivery is required.
6.2.5 The p system shall support efficient and reliable control and data delivery to and from groups of devices.
Control and data delivery to and from groups of devices shall be categorized, based on delay requirements and reliability requirement.
Delay-bounded group data delivery mechanism shall be provided to disseminate delay-sensitive information to/from a group of M2M devices.
Feedback mechanism may be provided to ensure the reliability of critical control and data delivery to/from M2M devices for mission-critical M2M transmission.

7. Proposed Text to the IEEE 802.16p M2M SRD (2)
6.2.6 The p system shall support efficient mechanisms for network access from large numbers of M2M devices.
Energy-efficient group data delivery mechanism shall be provided to disseminate delay-tolerant information to/from a group of M2M devices. The energy-efficient group delivery mechanism shall be integrated with power saving mechanism of M2M devices.
6.2.8 The p system shall provide mechanisms for allowing access with different levels of priority for M2M devices across different classes of M2M services.
The access of different M2M services shall be pre-emptive. M2M transmission with higher priority level should be able to gain access from low level ones.

8. References
[1] C80216ppc-10_0014, “Project Planning Committee (PPC): Session #69 WG Closing Plenary Report,” IEEE PPC,
[2] C80216ppc-10_0053, “Efficient Control of a Large Number of Devices,” Eldad Zeira, InterDigital Communications,
[3] C80216ppc-10_0011r2, “IEEE p Machine to Machine (M2M) System Requirements Document (Initial Working document revised),”