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Dear Chiwoo,
Thank you for your comments and questions.
For the first question, rank-sufficient superimposed channel is, as you said,
nothing but UL MU-MIMO, which is also called UL CSM.
In the case of rank-deficent transmission, it does relate to the BS detection/decoding capability.
Furthermore, the BS may also need to measure the recived signal strength from both AMS and
M2M devices to decide which RB can be used for rank-deficient superimposed transmission.
To AMS, the UL transmission of M2M devices on the same RB would be transparent.
For your third question, as I know, the current 16m supports only PFBCH for UL repetition
transmission, right? Most of the repetition supported in 16m are control and feedback signaling
except CDR which is a kind of MIMO mode. Therefore if we would like to support UL repetition coding
for M2M data transmission, the new indication field may be required in A-MAP IE.
However, we don't have any specific proposal so far concerning about this issue. But we will take
a closer look at it.
Thanks and best wishes,
Jia-Hao
Dear Jia-Hao,
Thanks for your sharing your ideas and Sorry for late reply.
I reviewed your contribution (0018) and had some questions.
Please let me know your opinion.
1. The superimposed transmission with rank-sufficient MIMO condition seems to be same as current UL CSM. Is it right?
2. The superimposed transmission with rank-deficient MIMO condition seems to be highly related to capability (SIC) of BS side and it’s a implementation issue.
3. Lastly, there is a restriction for signaling of repetition coding in 16m. Did you check this point?
Thanks in advance.
Br,
Chiwoo
From: Wu Jeffery [mailto:schechters@GMAIL.COM]
Sent: Friday, February 18, 2011 3:54 PM
To: STDS-802-16@LISTSERV.IEEE.ORG
Subject: [STDS-802-16] [802.16p][DEV RG] Discussion on Supporting Transmission of Large Number of Devices
Dear all,
I am Jia-Hao from ITRI. After the second CC of DEV RG, I would like to kick off an e-mail discussion about supporting transmission of large number of devices.
So far, most of the discussion about supporting large number of M2M devices to access network focuses on network entry functionalities. For the data transmission (devices which are in connected state), it is relatively lack of discussion. However, I think we should not preclude the cases where a large number of M2M devices (or geographically based M2M groups) may simultaneous transmit data in a heavily loaded network with 16e/16m AMS.
In addition, considering IEEE 802.16p SRD (IEEE 802.16p-10/0004r2), there are some related functional requirements to support transmission of large number of devices:
6.2.4 The 802.16p system shall support optimized signaling for resource allocation for large numbers of M2M devices individually or by group.
6.2.5 The 802.16p system shall support efficient and reliable delivery of control and data to and from a large number of devices.
6.2.6 The 802.16p system shall support efficient mechanisms for network access from large numbers of M2M devices.
6.2.6.1 The 802.16p system shall provide mechanisms to reduce access network congestion or overload from large numbers of M2M Devices.
6.2.9 The 802.16p system shall support large numbers of M2M devices in connected state as well as in idle state. Signaling shall be optimized for transitions between the two states.
Upon these requirements, we have uploaded a contribution (IEEE C802.16p-11/0018) on the server and presented our basic ideas in the second CC. This is basically a PHY layer proposal. And this proposal is to allow uplink data transmission of 16p M2M devices and 16m AMS (or 16e MS) to be superimposed on the same set of RB. The proposed text could be found in the contribution.
We would like to hear your opinions. Any comments would be appreciated. Thank you.
Rest Regards,
Jia-Hao Wu