1. PHY/MAC Proposal for the IEEE 802.22b
Month Year
doc.: IEEE yy/xxxxr0
Nov. 2012
PHY/MAC Proposal for the IEEE b
IEEE P Wireless RANs Date:
Authors:
Notice: This document has been prepared to assist IEEE It is offered as a basis for discussion and is not binding on the contributing individual(s) or organization(s). The material in this document is subject to change in form and content after further study. The contributor(s) reserve(s) the right to add, amend or withdraw material contained herein.
Release: The contributor grants a free, irrevocable license to the IEEE to incorporate material contained in this contribution, and any modifications thereof, in the creation of an IEEE Standards publication; to copyright in the IEEE’s name any IEEE Standards publication even though it may include portions of this contribution; and at the IEEE’s sole discretion to permit others to reproduce in whole or in part the resulting IEEE Standards publication. The contributor also acknowledges and accepts that this contribution may be made public by IEEE
Patent Policy and Procedures: The contributor is familiar with the IEEE 802 Patent Policy and Procedures including the statement "IEEE standards may include the known use of patent(s), including patent applications, provided the IEEE receives assurance from the patent holder or applicant with respect to patents essential for compliance with both mandatory and optional portions of the standard." Early disclosure to the Working Group of patent information that might be relevant to the standard is essential to reduce the possibility for delays in the development process and increase the likelihood that tpublication will be approved for publication. Please notify the Chair
Apurva Mody as early as possible, in written or electronic form, if patented technology (or technology under patent application) might be incorporated into a draft standard being developed within the IEEE Working Group. If you have questions, contact the IEEE Patent Committee Administrator at
S. Sasaki, B. Zhao, et al., Niigata Univ.
John Doe, Some Company

2. Month Year
doc.: IEEE yy/xxxxr0
Nov. 2012
Summary
This document contains a partial PHY/MAC proposal for the IEEE b.
This proposal covers PAR Scope and the following requirements
For b PHY
Supports low complexity/capability design (PAR Scope)
Supports cost-effective compliance with regulatory spectral mask (Requirements 01, 12)
Supports higher data rates (PAR Scope, Requirement 02)
For b MAC
Supports multi-channel utilization (PAR Scope, Requirement 02)
S. Sasaki, B. Zhao, et al., Niigata Univ.
John Doe, Some Company

3. Technology Overview PHY MAC
Nov. 2012
Technology Overview
PHY
Use of multiple subchannels for uplink to cover low-rate applications, mainly for low-complexity CPE (L-CPE)
Multidimensional Trellis Coded Modulation to cover high-rate applications
MAC
Multiple channels used to cover high-rate applications
Modification of Channel Set Management
S. Sasaki, B. Zhao, et al., Niigata Univ.

4. Frame Structure (Ref. [3])
Nov. 2012
Frame Structure (Ref. [3])
S. Sasaki, B. Zhao, et al., Niigata Univ.

5. PHY Proposal Low-rate applications High-rate applications
Nov. 2012
PHY Proposal
Low-rate applications
Use 3 subchannels with repetition for the uplink transmission
High-rate applications
Conventional FEC and higher-order QAM (i.e. 256QAM)
Multidimensional Trellis Coded Modulation (MD-TCM)
MD-TCM can be the Wei construction (Ref. [4])
MD-TCM according to ITU-T Recommended V. 34 [5][6]
PHY mode 1 – 16 (Table 202 in the IEEE )
No Change on existing PHY modes
Add some new PHY modes shown in the following slides
S. Sasaki, B. Zhao, et al., Niigata Univ.

6. （通常の Nov. 2012 Figure Typical block diagram of OFDM system
S. Sasaki, B. Zhao, et al., Niigata Univ.

7. Additional Low-rate PHY for Upstream
Nov. 2012
Additional Low-rate PHY for Upstream
Sub-ch #
Sub-channels #1 - #6 are usually reserved for opportunistic or scheduled control signaling. (Ref. [3], Clause 9.6)
For rest of subchannels:
Use a group of 3 subchannels for either
3-times repetition of data in 1 subchannel
3 subchannels
S. Sasaki, B. Zhao, et al., Niigata Univ.

8. Additional PHY Mode (Low-rate)
Month Year
doc.: IEEE yy/xxxxr0
Nov. 2012
Additional PHY Mode (Low-rate)
Table PHY Modes and their related modulations, coding rates and data rates for TCP = TFFT/16
PHY
Mode
Modulation
Coding Rate
# of Subchannels
# of repetition
Data rate
(kb/s)
(CP=TFFT/16)
Remarks L1
QPSK
1/2 1 3
75.618 L2
3/4 L3 L4
FEC: Binary convolutional coding scheme in Ref. [3]
S. Sasaki, B. Zhao, et al., Niigata Univ.
John Doe, Some Company

9. Additional PHY Mode (High-rate)
Nov. 2012
Additional PHY Mode (High-rate)
Table PHY Modes and their related modulations, coding rates and data rates for TCP = TFFT/16
PHY
Mode
Modulation
Coding Rate
Data rate
(Mb/s)
Spectral Efficiency (for 6 MHz bandwidth)
Remarks H1
256-QAM
3/4
27.24
4.56 H2
5/6
30.27
5.07 H3
7/8
31.78
5.32 H4
4D-TCM- 48-QAM
10/11
22.7
3.78 H5
4D-TCM- 192-QAM
14/15 H6
8D-TCM 224-QAM
72/76
40.83
6.84
FEC: Binary convolutional code in Ref. [3] (256QAM)
S. Sasaki, B. Zhao, et al., Niigata Univ.

10. MD-TCM based on Wei construction [4]
Nov. 2012
MD-TCM based on Wei construction [4]
4-D (2*2-D) symbols
Data mapping/coding contains
Coset selection (2 * 2 bits)
Region pair selection (3 bits)
Symbol code (2*2bits or 2*4 bits) O
A C
D B I1 I0
Fig. 2-D constellation of 4D-TCM 192QAM
S. Sasaki, B. Zhao, et al., Niigata Univ.

11. Structure of Data Mapping (PHY mode H4 and H5)
Nov. 2012
Structure of Data Mapping (PHY mode H4 and H5)
# of information bits accommodated in 4-D symbol (2x2-D symbols)
PHY mode H4 : 10 bits (5bits/symbol)
PHY mode H5 : 14 bits (7bits/symbol)
S. Sasaki, B. Zhao, et al., Niigata Univ.

12. MD-TCM based on ITU-T Rec. V.34
Nov. 2012
MD-TCM based on ITU-T Rec. V.34
Another MD-TCM based on ITU-T Rec. V.34 is applied in the PHY mode H6.
896-point superconstellation is applied
224-point 2-D constellation x 4 symbols
9bits/symbol
Please see Ref. [5] and [6] for more information.
Fig. A quarter of the points of superconstellation
in ITU-T Rec. V.34
S. Sasaki, B. Zhao, et al., Niigata Univ.

13. Structure of Data Mapping (PHY mode H6)
Month Year
doc.: IEEE yy/xxxxr0
Nov. 2012
Structure of Data Mapping (PHY mode H6)
Q=4 in this simulation
Original V.34 (3000 symbol/s)
Superframe (280ms) – 7 data frames(40ms) mapping frames – [[4 4-D symbol intervals – 2 2-D symbols]]
-> one mapping frame consists of 8 2-D symbols
# of total The total number of primary and auxiliary channel data bits transmitted in a data frame is denoted by:
N = R · 0.28/J (J=7 in the case of 3000sps)
where R is the sum of the primary channel data signalling rate and the auxiliary channel data signalling rate.
The total number of (primary and auxiliary channel) data bits transmitted in a mapping frame shall vary between b – 1 ("low frame") and b ("high frame") bits according to a periodic switching pattern SWP, of period P, such that the average number of data bits per mapping frame is N/P. (P=15 in the case of 3000sps)
The value of b is defined as the smallest integer not less than N/P. The number of high frames in a period is the remainder:
r = N – (b – 1)P (8-2) where: 1≤r≤P
SWP is represented by 12- to 16-bit binary numbers where 0 and 1 represent low and high frames, respectively
The auxiliary channel bits shall be time-division multiplexed with the scrambled primary channel bits.
The number of auxiliary channel bits transmitted per data frame is W = 8 at symbol rates 3000
Signal Constellation
Signal constellations consist of complex-valued signal points which lie on a two-dimensional rectangular grid.
All signal constellations used in this Recommendation are subsets of a 1664-point superconstellation.
one-quarter of the points in the superconstellation. These points are labelled with decimal integers between 0 and 415.
The full superconstellation is the union of the four quarter-constellations obtained by rotating the constellation in Figure 5 by 0, 90, 180 and 270 degrees.
A signal constellation with L points consists of the L/4 points from the quarter-constellation in Figure 5 with labels 0 through L/4 – 1, and the 3L/4 points which are obtained by 90, 180 and 270 degree rotations of these signal points.
9.2 Mapping parameters
The number of bits put into the shell mapper per mapping frame is denoted by K where 0 ≤ K < 32. The values of K are given in Table 10.
K can also be determined from b as follows:
K = if b ≤ 12; = b – 12 – 8q if b > 12
where q is the smallest non-negative integer such that K < 32 (q = 0 when K = 0).
The 2D signal constellation is partitioned into M concentric rings of equal size.
For each data rate and symbol rate, two possible values of M are allowed: a "minimum" value which minimizes the number of points in the 2D signal constellation, and a larger value which allows the achievement of shaping gain. M is selected during Phase 4 of the start-up procedures as described in 11.4 or 12.4.
The values of M are given in Table 10. These values can also be calculated from K as follows: the minimum value of M is the smallest integer no less than 2K/8 and the larger value of M is the nearest integer to 1.25 · 2K/8 (not less than the minimum value of M).
Table 10 gives the number of signal points L in the 2D signal constellation. L can also be calculated according to: L = 4M · 2q
S. Sasaki, B. Zhao, et al., Niigata Univ.
John Doe, Some Company

14. Simulation Parameters (1)
Nov. 2012
Simulation Parameters (1)
Prameters
Specification
Center frequency
207 [MHz]
Bandwidth
6 [MHz]
Data mapping
64QAM, 256QAM,
4D-TCM48QAM, 4D-TCM192QAM
Convolution code
[ ]8
Decoding
Soft-decision Viterbi decoding
Modulation
OFDM
FFT size
2048 (data：1440, pilot:240）
Cyclic Prefix Modes
1/8
Channel
AWGN, Channel Model A・B
S. Sasaki, B. Zhao, et al., Niigata Univ.

15. Simulation Results (AWGN channel)
Nov. 2012
Simulation Results (AWGN channel)
S. Sasaki, B. Zhao, et al., Niigata Univ.

16. Simulation Results (IEEE 802.22 CM A)
Nov. 2012
Simulation Results (IEEE CM A)
S. Sasaki, B. Zhao, et al., Niigata Univ.

17. Simulation Results (IEEE 802.22 CM B)
Nov. 2012
Simulation Results (IEEE CM B)
S. Sasaki, B. Zhao, et al., Niigata Univ.

18. Simulation Parameters (2)
Nov. 2012
Simulation Parameters (2)
Prameters
Specification
Center frequency
207 [MHz]
Bandwidth
6 [MHz]
Data mapping
(7/8 coded) 256QAM, (7/8 coded) 512QAM
4D-TCM192QAM, 8D-TCM224QAM
Convolution code
[ ]8
Decoding
Soft-decision Viterbi decoding
Modulation
OFDM
FFT size
2048 (data：1440, pilot:240）
Cyclic Prefix Modes
1/8
Channel
AWGN
S. Sasaki, B. Zhao, et al., Niigata Univ.

19. Simulation Results (AWGN channel)
Nov. 2012
Simulation Results (AWGN channel)
S. Sasaki, B. Zhao, et al., Niigata Univ.

20. Nov. 2012
MAC Proposal
Use multiple TV Channels to cover higher-rate applications
Modification of channel set management may be necessary to for use of multiple TV channels
Detail : TBD
Modification of Figure 162 and Table 232 in Ref. [3] to keep the description of the standard consistent.
Details are shown in the following slides.
S. Sasaki, B. Zhao, et al., Niigata Univ.

21. Channel classification and selection in IEEE 802.22-2011 p.368
Nov. 2012
Channel classification and selection in IEEE p.368
“Protected channels may be moved to the candidate channel set in the event that the incumbent or the WRAN systems have vacated the channel.”
To keep consistency among the text, figures and tables, we propose a modification of Figure 162 and Table 232 into the following two slides according to the text mentioned above.
S. Sasaki, B. Zhao, et al., Niigata Univ.

22. Channel Set Transition Diagram (IEEE802.22-2011, Fig. 162)
Nov. 2012
Channel Set Transition Diagram (IEEE , Fig. 162)
S. Sasaki, B. Zhao, et al., Niigata Univ.

23. Channel Set Transition Matrix IEEE 802.22-2011, Table 232
Nov. 2012
Channel Set Transition Matrix IEEE , Table 232
State
Unclassified
Candidate
Backup
Operating
Protected
Event
Event 1
Event 2
Event 3
Event 4
Event 5
Event 6
Event 7
Event 8
S. Sasaki, B. Zhao, et al., Niigata Univ.

24. Proposed Modification of the State Transition Diagram
Nov. 2012
Proposed Modification of the State Transition Diagram
S. Sasaki, B. Zhao, et al., Niigata Univ.

25. Proposed Modification of the State Transition Matrix
Nov. 2012
Proposed Modification of the State Transition Matrix
State
Unclassified
Candidate
Backup
Operating
Protected
Event
Event 1
Event 2
Event 3
Event 4
Event 5
Event 6
Event 7
Event 8
S. Sasaki, B. Zhao, et al., Niigata Univ.

26. Nov. 2012
Conclusions
This partial PHY/MAC proposal for the IEEE b contains the following features:
PHY
Use of multiple subchannels for uplink to cover low-rate applications, mainly for low-complexity CPE (L-CPE)
Multidimensional Trellis Coded Modulation to cover high-rate applications
MAC
Multiple channel use to cover high-rate applications
Modification of Channel Set Management
S. Sasaki, B. Zhao, et al., Niigata Univ.

27. References Call for proposal, Doc. 802.22-12/0024r03-000b
Month Year
doc.: IEEE yy/xxxxr0
Nov. 2012
References
Call for proposal, Doc /0024r03-000b
Selection criteria document, /0025r08-000b
IEEE , July 201
L. F. Wei, “Trellis-coded modulation with multidimensional constellations,” IEEE Trans. Info. Theory, vol. 33, No. 4, pp , 1987
ITU-T Recommendation V.34, “A modem operating at data signalling rates of up to bit/s for use on the general switched telephone network and on leased point-to-point 2-wire telephone-type circuits,” Feb. 1998
G. D. Forney, Jr., et al., The V.34 High-Speed Modem Standard, IEEE Commun. Mag. pp , Dec. 1996
S. Sasaki, B. Zhao, et al., Niigata Univ.
John Doe, Some Company