Intel Corp.

Group-based M2M solutions Document Number:

IEEE C802.16p-11/0013Date Submitted:

2010/03/03Source:

Honggang Li, Rui Huang, Shantidev Mohant E-mail: honggang.li@intel.comIntel Corp.*<http://standards.ieee.org/faqs/affiliationFAQ.html>

Re:802.16p amendment text(CfC: Project 802.16p Amendment Working Document Content)

Base Contribution:IEEE C802.16p-11/xxxx

Purpose:To be discussed and adopted in the AWD by the 802.16p M2M TG

Notice:This document does not represent the agreed views of the IEEE 802.16 Working Group or any of its subgroups. It represents only the views of the participants listed in the “Source(s)” field above. It is offered as a basis for discussion. It is not binding on the contributor(s), who reserve(s) the right to add, amend or withdraw material contained herein.

Copyright Policy:The contributor is familiar with the IEEE-SA Copyright Policy <http://standards.ieee.org/IPR/copyrightpolicy.html>.

Patent Policy:The contributor is familiar with the IEEE-SA Patent Policy and Procedures:

<http://standards.ieee.org/guides/bylaws/sect6-7.html#6> and <http://standards.ieee.org/guides/opman/sect6.html#6.3>.Further information is located at <http://standards.ieee.org/board/pat/pat-material.html> and <http://standards.ieee.org/board/pat >.

March 2011 Slide 1

March 2011 Intel Corp. Slide 2

Abstract

• This presentation discusses the candidate solutions to meet the requirements defined in SRD, based on M2M devices grouping.

Functional requirements of 16p

• Low power consumption• Large numbers of devices• Small burst transmissions• Security support• We discuss the candidate solutions to the

requirements of low power consumption and large numbers of devices

March 2011 Slide 3Intel Corp.

Low power consumption

• Both transmit power and processing power make contribution to the power consumption of an M2M device.

• To save transmit power, the straightforward way is to group co-located M2M devices and relay M2M traffic by a relay station

– >10dB can be saved for pathloss of most of M2M devices transmission

• And M2M grouping can shorten the transmission time due to better channel quality and higher data rate, so that the processing power can be saved.

Non-grouping M2M transmission Grouping M2M transmission

March 2011 Slide 4Intel Corp.

Pathloss saving BS-MS vs. RS-MS(LOS) BS-MS vs. RS-MS(NLOS)

Rcell=1000m, Rrelay=100m 45dB 10dBRcell=300m, Rrelay=30m 32dB 12dB

Large numbers of devices

• Most of M2M devices are cluster-type deployed, e.g. in a home, floor, warehouse etc.

• A cluster of devices can share a same connection with the BS, and aggregate the transmissions to simplify the air interface design due to– Lighter load compared with random access from large numbers of

devices– Less interference

March 2011 Slide 5Intel Corp.

Solutions to M2M grouping• 16m relay M2M grouping

– In a group, there is a relay station between M2M devices and the BS, the RS can also be an M2M device

– Because only the RS communicates with the BS, most of M2M devices can work in low power

– The RS can support M2M data aggregation, so that multiple reports from M2M devices can be collected and packed in one PSDU or MSDU regarding if the destination addresses are the same one or not, to improve the spectral efficiency in relay link

• Dual mode(het-net) M2M grouping – The dual-mode device can be used to forward the traffic between the BS and M2M

devices, the dual-mode device can be WiMAX hotspot– Similar like 16m relay grouping, except that the access link between the RS and

other M2M devices can be 802.11 or other air interface• Group-based signaling and transmission

– Some of control process can done by one of devices of the group and shared with other devices, e.g. group-based bandwidth request and channel allocationMarch 2011 Slide 6Intel Corp.

16m Relay M2M Grouping

• M2M relay station is the relay station with M2M enhancements, e.g. data aggregation• Pros

– Reuse the relay station definition in 16m, save the Tx power of M2M devices and reduce the access load of the BS, data aggregation can improve spectral efficiency furthermore

• Cons– The deployment relies on the RS-functioned station– Frame structure, the relay zone occupies at least one subframe, which waste radio resource sometime

An example of 16m relay-based M2M in TDD

March 2011 Slide 7Intel Corp.

Dual-mode(het-net) M2M Grouping

• A station is responsible for forwarding the traffic between the BS and M2M devices, this station can be a M2M device also. The air interface between the BS and the forwarding station can be based on 16e/16m, and the air interface to M2M devices can be based on 802.11 or other short-range technologies.

• Pros– Save the Tx power of M2M devices and reduce the access load of the BS, data aggregation can improve spectral

efficiency furthermore– No 16m relay required– 16m network offloading

• Cons– At least one dual-mode station is required in a group

March 2011 Slide 8Intel Corp.

Group signaling based on 16m/16e

• For co-located M2M devices, multiple M2M devices can transmit within a Tx window, one of them can request bandwidth in the name of group, and share a set of transmission parameters such as power control, MCS selection, MIMO mode etc.

• Option 1: 16m Group Resource Allocation• Option 2: group-based signaling based on 16e• Pros

– The group-oriented control signaling can save the signaling overhead in N(No.of M2M devices in a group) times roughly compared with non-grouped solution

– No requirement of 16m relay or dual-mode forwarding station• Cons

– There are still traffic data and ACK between the BS and each M2M deviceMarch 2011 Slide 9Intel Corp.

u1 u3

u2

u4

u5

u6

u1 u3

u2

u1 u3

u2

u4

u5

u6

T2

T1 T1

M2M devices in group 1

M2M devices in group 2

t

Radio resources allocated to group 1

Radio resources allocated to group 2

Comparison among three candidates

Grouping solutions

Dual mode required

16m Relay required

Signaling overhead

Power consume

Efficiency of channel usage

802.16m relay No Yes Low Low Middle**

Dual-mode group

Yes* No Low Low High

802.16m/16eGroup signaling

No No Middle High Low

* At least one dual-mode device is required as relay station** due to relay zone allocation

March 2011 Slide 10Intel Corp.

Intel Corp. 11

Proposed text

[Add the following text after line 11 in page 16 of Section 16.2.1]Group-based M2M transmission of control and traffic should be

supported to meet the requirements of 16p SRD[]. The group-based M2M transmission can be based on 802.16m relay, or Het-net dual-mode forwarding, or non-forwarding signaling sharing mechanisms. Which mechanism to be selected in 16p is to be decided.

March 2011

References

• [1] Jin Lee, “IEEE 802.16p Machine to Machine (M2M) System Requirements Document”, IEEE 802.16p-10/0004r2

• [2] Roshni Srinivasan , “IEEE 802.16m Evaluation Methodology Document (EMD)“, IEEE 80216m-08_004r5

• [3] IEEE P802.16m/D11

March 2011 Slide 12Intel Corp.