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Discussion of Control Channel Power Control DesignIEEE 802.16 Presentation Submission Template (Rev. 9) Document Number: IEEE S802.16m-09/2846
Date Submitted:2009-12-31
Source: Rongzhen Yang, Xinrong Wang, Hongmei Sun, Yuan Zhu, Yi Hsuan E-mail: [email protected] Davydov, Hujun Yin, Yang-seok ChoiIntel Corporation
Jeongho Park Email : [email protected] Electronics
Wookbong Lee Email : [email protected] LG Electronics
Wilson Tim E-mail: [email protected]
Motorola Inc. Venue:.
RE: Comments on P802.16m/D3
Purpose: To support power control of control channel design in contribution C802.16m-09/2846
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.
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 802.16.
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 >.
Fixed Rate and Variable Rate Control Channels
• Fixed Rate Control Channel:– HARQ Feedback
– Synchronized Ranging
– P-FBCH
– Bandwidth Request
Power Control for Fixed Rate Control Channel: The single SINRTarget signaled by ABS
• Variable Rate Control Channel: S-FBCH– Special power control design for the balance between flexibility and
signaling overhead;
HARQ Feedback
SNR per Tone @ Target PER of 1% for ACK->NCK
SNR per Tone @ Target PER of 0.1% for NCK->ACK
PB3, 6 Users -4.5 + 4.7 = 0.2 -5.4 + 4.7 = -0.7
VA60, 6 Users -3.5 + 4.7 = 1.2 -4.3 + 4.7 = 0.4
VA120, 6 Users -3.5 + 4.7 = 1.2 -4.2 + 4.7 = 0.5
VA350, 6 Users -3.0 + 4.7 = 1.7 -3.9 + 4.7 = 0.8
(simulation results in C80216m-09_0169, Transmit power per tone is 4.7dB boosting, 1x2)
• Value Range for HARQ Feedback: -3.5 dB ~ 4 dB with 0.5 dB step
• Default value 2 dB can meet the requirement for 1x2
• Minimum -3.5 dB for more receive antennas or better receiver algorithm
• 4 dB target value for the worse case
• So, the SINR_Target_HARQ is defined as:
“SINR_Target_HARQ is the HARQ feedback channel target SINR value broadcasted by the ABS. It has 4 bits to represent the value among {-3.5, -3, -2.5, -2, -1.5, -1, -0.5, 0, 0.5, 1, 1.5, 2, 2.5, 3, 3.5, 4} dB”
Synchronized Ranging
• Value Range for Synchronized Ranging: -9 dB ~ -1.5 dB with 0.5 dB step
– Default value -3 dB can meet the requirement for 1x2
– Minimum -9 dB for more receive antennas or better receiver algorithm
– -1.5 dB target value for the worse case
• So, the SINR_Target_SyncRanging is defined as:
“SINR_Target_SyncRanging is the synchronized channel target SINR value broadcasted by the ABS. It has 4 bits to represent the value among {-9, -8.5, -8, -7.5, -7, -6.5, -6, -5.5, -5, -4.5, -4, -3.5, -3, -2.5, -2, -1.5} dB”
One User Two Users (0dB SIR)
PB3 -6.3 dB -3 dB
VA350 -6 dB -2 dB
-12 -10 -8 -6 -4 -2 0 2 4 610
-4
10-3
10-2
10-1
100
SNR per ranging subcarrier in dB
Mis
sed
dete
ctio
n pr
obab
ility
, F
A r
ate
ZC-211, 48 codes, deltaF, ITU-PB3, 2 users
40dB SIR
0dB SIRFA-0-0
FA-0-m40
-12 -10 -8 -6 -4 -2 0 2 4 610
-4
10-3
10-2
10-1
100
SNR per ranging subcarrier in dB
Mis
sed
dete
ctio
n pr
obab
ility
, F
A r
ate
ZC-211, 48 codes, deltaF, ITU-VA350, 2 users
40dB SIR
0dB SIRFA-0-0
FA-0-m40
Table: SNR per Tone @ Target Missed Detection 1%
P-FBCH
SNR per Tone @ Target PER 1%
PB3 -1.6 dB
VA120 0 dB
VA350 3 dB or 0 dB*
(simulation results in C80216m-09_0729)
* By the advanced non-coherent receiver (from Qinghua,Yuan)
• Value Range for P-FBCH: -4.5 dB ~ 3 dB with 0.5 dB step
– Default value 0 dB can meet the requirement for 1x2
– Minimum -4.5 dB for more receive antennas or better receiver algorithm
– 3 dB target value for the worse case
• So, the SINR_Target_PFBCH is defined as:
“SINR_Target_PFBCH is the P-FBCH target SINR value broadcasted by the ABS. It has 4 bits to represent the value among {-4.5, -4, -3.5, -3, -2.5, -2, -1.5, -1, -0.5, 0, 0.5, 1, 1.5, 2, 2.5, 3} dB”
Bandwidth Request
• Simulation Result in C80216m-09_1316 is: – 0.5 dB SNR per Tone @ Target PER 1%
– Simulation condition: 1x2, PB3
• Value Range for P-FBCH: -4.5 dB ~ 3 dB with 0.5 dB step– Default value 0.5 dB can meet the requirement for 1x2
– Minimum -4.5 dB for more receive antennas or better receiver algorithm
– 3 dB target value for the worse case
• So, the SINR_Target_BWRequest is defined as:
“SINR_Target_BWRequest is the bandwidth request channel target SINR value broadcasted by the ABS. It has 4 bits to represent the value among {-4.5, -4, -3.5, -3, -2.5, -2, -1.5, -1, -0.5, 0, 0.5, 1, 1.5, 2, 2.5, 3} dB”
Variable Rate Control Channel: S-FBCH
• 18 levels of coding rate: l=7~24• It is obviously un-reasonable to define 18 parameters with big signaling
overhead;
Reference (D3):
S-FBCH Power Control Draft Design
• Only 2 signaled parameters are required for S-FBCH uplink power control– SINR_Target_SFBCH_Base is used to signal
– SINR_Target_SFBCH_Delta is used to signal
• The design provides the tradeoff between the flexibility and signaling overhead;
DeltaBaseetT SFBCHllSFBCHSFBCHSINR )()( minarg
Where
is base SINRtarget value signaled by SINR_Target_SFBCH_BASE;
is differential SINRtarget value signaled by SINR_Target_SFBCH_Delta;
is S-FBCH payload information bits number as defined in 16.3.9.2.1.2;
is minimum S-FBCH payload information bits number ( = 7 ) as defined in 16.3.9.2.1.2;
BaseSFBCH
DeltaSFBCH
l
minl
BaseSFBCH
DeltaSFBCH
S-FBCH Simulation Results Study
• is defined as 4 bits to represent {-4.5, -4, -3.5, -3, -2.5, -2, -1.5, -1, -0.5, 0, 0.5, 1, 1.5, 2, 2.5, 3} dB, default value: 1.5 dB
• is defined as 3 bits to represent {0, 0.20, 0.21, 0.22, 0.23, 0.24, 0.25, 0.26}, default value: 0.24 dB
7 bits 12 bits 24 bits SFBCHDelta
PB3 1.5 dB 2.7 dB 5.7 dB 0.247 dB
VA120 3.1 dB 4.1 dB 7.1 dB 0.235 dB
VA350 3.5 dB 4.4 dB 7.4 dB 0.230 dB
(simulation results in C80216m-09_0875r1, Transmit power of pilot is 3dB boosting, 1x2)
Table: SNR per Data Tone @ Target PER of 1%
BaseSFBCH
DeltaSFBCH
Linear Approaching of S-FBCH Target Value
• The SFBCHDelta are very close for different speeds
• The differences for SFBCHBase at different speeds can be compensated by offset value OffsetControl or better receiver implementation;
6 8 10 12 14 16 18 20 22 241
2
3
4
5
6
7
8
Payload Bits
SIN
R T
arg
et
Va
lue
(dB
)
Linear Approaching of S-FBCH SINR Target
PB3 Simulation ResultVA120 Simulation ResultVA350 Simulation ResultPB3 Approaching (Base=1.5, Delta=0.25VA120 Approaching (Base=3, Delta=0.24VA350 Approaching (Base=3.5, Delta=0.23
Summary of Control Channel Power Control
• Fixed Rate Control Channel (4 bits each):SINR_Target_HARQ: {-3.5, -3, -2.5, -2, -1.5, -1, -0.5, 0, 0.5, 1, 1.5, 2, 2.5, 3, 3.5,
4} dB, default value 2 dB
SINR_Target_SyncRanging: {-9, -8.5, -8, -7.5, -7, -6.5, -6, -5.5, -5, -4.5, -4, -3.5, -3, -2.5, -2, -1.5} dB, default value: -3 dB
SINR_Target_PFBCH: {-4.5, -4, -3.5, -3, -2.5, -2, -1.5, -1, -0.5, 0, 0.5, 1, 1.5, 2, 2.5, 3} dB, default value 0 dB
SINR_Target_BWRequest: {-4.5, -4, -3.5, -3, -2.5, -2, -1.5, -1, -0.5, 0, 0.5, 1, 1.5, 2, 2.5, 3} dB, default value 0.5 dB
• S-FBCH (7 bits):SFBCHBase: 4 bits = {-4.5, -4, -3.5, -3, -2.5, -2, -1.5, -1, -0.5, 0, 0.5, 1, 1.5, 2, 2.5,
3} dB, default value: 1.5 dB
SFBCHDelta: 3 bits = {0, 0.20, 0.21, 0.22, 0.23, 0.24, 0.25, 0.26}, default value: 0.24 dB
Recommendation
• The related text in C80216m-09/2846 (or its latest version) is recommended to be adopt in to AWD D3.
