IEEE C80216n-11/0214r3
Project
Title
IEEE 802.16 Broadband Wireless Access Working Group <http://ieee802.org/16>
Control for two HR-MS associated with an HR-BS
Date
Submitted
11/10/11
Source(s)
Youn-Tai Lee, Chun-Yen Hsu
Institute for Information Industry (III)
lyt@nmi.iii.org.tw
Yih-Guang Jan, Yang-Han Lee,
Jheng-Yao Lin, Chih-Yuan Lo,
Liang-Yu, Yen
Tamkang University (TKU)
yihjan@yahoo.com
Hsien-Wei Tseng
De Lin Institute of Technology (DLIT)
hwtseng@mail.dlit.edu.tw
Ming-Tuo Zhou, Liru Lu (Alina), Xin Zhang, mingtuo@nict.com.sg
Hoang Vinh Dien, Masayuki Oodo, Hiroshi
Harada
National Institute of Information and
Communications Technology (NICT)
Re:
GRIDMAN Task Group Meeting, November 2011 in Atlanta, Georgia, USA
Abstract
In this contribution we make contribution on Power control for two HR-MS associated with an
HR-BS(16.2.2.2.2.1) for 802.16n Amendment Working Document
Purpose
To discuss and adopt the proposed text in the P802.16n Draft AWD.
Notice
Release
Patent
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IEEE C80216n-11/0214r3
Power Control for two HR-MS associated with an HR-BS
Youn-Tai Lee, Chun-Yen Hsu
Institute for Information Industry (III)
Yih-Guang Jan, Yang-Han Lee, Jheng-Yao Lin, Chih-Yuan Lo, Liang-Yu Yen
Tamkang University (TKU)
Hsien-Wei Tseng
De Lin Institute of Technology (DLIT)
Ming-Tuo Zhou, Liru Lu (Alina), Xin Zhang, Hoang Vinh Dien, Masayuki Oodo, Hiroshi Harada
National Institute of Information and Communications Technology (NICT)
1. Introduction
This contribution provides comment on P802.16n Draft AWD
2. Proposed IEEE 802.16n AWD Text Modification
Note:
The text in BLACK color: the existing text in the 802.16n Amendment Draft Standard
The text in RED color: the removal of existing 802.16n Amendment Draft Standard Text
The text in BLUE color: the new text added to the 802.16n Amendment Draft Standard Text
Line 12, Page 52,”Definition of power control is TBD” should be modified as following
===================Start of Proposed Text====================
16.2.2.2.2.1 Power control for two HR-MS associated with an HR-BS
Three possible types of power control for the adjustment of the transmission powers of MSs when two HR-MS,
HR-MS1 and HR-MS2, are associated an HR-BS can be categorized as in the following:
1. Type 1: As shown in Table XXXXX1 where the power control algorithm is performed on the HR-BS
after the HR-BS receives the power measurements information from HR-MS1 and HR-MS2.
2. Type 2: As shown in Table XXXXX2 where the power control algorithm for the HR-MS1 is performed
by the HR-MS1 and the power control algorithm for HR-MS2 is performed in HR-MS2 side. The
HR-BS does not intervene with the power control process.
3. Type 3: As shown in Table XXXXX3. It is the combination of the hybrid of Type 1 and Type 2 power
control algorithms. For example, the HR-BS performs the power control algorithm to state the possible
power control range between HR-MS pairs within its coverage and the HR-MS(s) performs the power
control algorithm between the paired HR-MS.
The power control may be performed on a regular (periodic) or on event involved basis. The power
measurement may be defined on the data traffic channel or on the control channel.
Many channel estimation algorithms can be found in the literature and it is up to user’s choice.
The operation of power control requires that measurements be performed by the HR-MS1 and HR-MS2.
The process of power measurements and their associated signaling are TBD.
IEEE C80216n-11/0214r3
The estimated power measured can be expressed as:
P  min Pmax , P0  10 log10 M    L
where
Pmax: maximal allowable MS transmit Power, dBm
P0: it is a cell specific and is the minimum MS transmitting power per physical resource block in dBm
that is used for controlling the received SNR target
L: path loss between HR-MS1 and HR-MS2 that can be estimated or calculated, in dB
M: number of physical Resource block in the direct communication
α: offset factor for path loss
In direct communication the power is adjusted is to make the link SINR(signal to noise plus interference) ratio
to meet the target requirement. The target SINR can be expressed as:
SINRT arg et  10 log 10 (max( 10 ^ ( SINRMin (dB) / 10 ),  IOT ( SINR DL )   ))   * (10 log 10 (TNS ))
where
SINRMin: the SINR requirement for the minimum data rate in the direct communication link
γIOT: the fairness and IOT(Interference over Thermal) control factor
SINRDL: a linear scale ratio of the downlink signal to interference power, measured by the forwarded HR-MS
α: a factor according to the number of receive antenna at the forwarding transmitter HR-MS
β: a parameter, it is either 0 or 1 depending on the influence of TNS on SINRTarget
TNS: the total number of streams in the direct communication. In SU-MIMO, it is the value of the number of
streams in the link
The estimated transmitting power can be determined from the determined SINRT arg et from the power control
algorithm as:
( SINR
/ 10)
Ptransmit  ( NoisePower  InterferencePoawer) * (10 Traget )
Where
SINRT arg et : target signal to interference and noise power ration in dBW
Noise power: noise power in watts (= N 0 *BW) with noise power spectral density N 0 and system channel
bandwidth BW.
Interference Power: Interference power in watts.
The power control command parameters can be added in AAI-SCD message with fields including the power
adjustment range, minimum and maximum allowable range, the power adjustment step size, and the fairness
and interference control factor etc.
IEEE C80216n-11/0214r3
Table XXXXX1 Power Control for two HR-MS associated with an HR-BS of type 1
HR-MS2
HR-MS1
HR-MS1-to-HR-MS2 communication
HR-BS
ation
l Estim
e
n
n
a
h
C
REQ
Chann
Channel Estimatio
n REQ
RS P
stimation
Channel E
el Esti
mation
RS P
No
Periodic power
Control
Measurement?
Event occur,
Power
Measurement REQ
Yes
)Power
(HR-BS t REQ
men
Measure
(HR-BS)Po
wer Measure
ment REQ
Power
Measurement #1
HR-MS2 ->
HR-MS1
Power
Measurement #2
HR-MS1 ->
HR-MS2
Power measu
RS P
rement
Power measurement RSP
Power
Control Algorithm for
Measurement #1, #2
Power Adjustment
Algorithm #1,#2
ent #1
Power Adjustm
Q
E
R
Power Adju
stment #1
RS P
Power Adjustment #2
RSP
stment #1
Power Adju
A CK
Power Adjustment #2
ACK
Power Adjustment #2
REQ
HR-MS1-to- HR-MS2 communication with new power level of
HR-MS1 Forwarding
IEEE C80216n-11/0214r3
Table XXXXX2 Power Control for two HR-MS associated with an HR-BS of type 2
HR-MS2
HR-MS1
HR-MS1-to-HR-MS2 communication
HR-BS
ation
l Estim
Channe Q
RE
Chann
el Esti
mation
RS
Channel Estimatio
n REQ
RS P
stimation
Channel E
P
Periodic power
Control
Measurement?
No
Event occur,
Power
Measurement REQ
Yes
)Power
(HR-BS t REQ
men
Measure
(HR-BS)Po
wer Measure
ment REQ
Power
Measurement #1
HR-MS2 ->
HR-MS1
Power
Measurement #2
HR-MS1 ->
HR-MS2
Power Measurement #1 RSP
Power Measurement #2 RSP
Power
Control
Algorithm for
Measurement #1
Power Adjustment REQ
Power Adjustment RSP
Power
Control
Algorithm for
Measurement #2
Power Adjustment ACK
Power
Adjustment
Algorithm #1
Power
Adjustment
Algorithm #2
Power Adjustmen
t #1
RSP
ent #2
Power Adjustm
RSP
stment #1
Power Adju
A CK
Power Adju
stment #2
A CK
HR-MS1-to- HR-MS2 communication with new power level of
HR-MS1 Forwarding
IEEE C80216n-11/0214r3
Table XXXXX3 Power Control for two HR-MS associated with an HR-BS of type 3
HR-MS2
HR-MS1
HR-MS1-to-HR-MS2 communication
HR-BS
ation
Channel Estim
REQ
Channe
l Estima
tion RS
P
Channel Estimation RE
Q
RS P
stimation
Channel E
No
Periodic power
Control
Measurement?
Event occur,
Power
Measurement REQ
Yes
ower
(HR-BS)P
ent REQ
Measurem
(HR-BS)Po
wer Measure
ment REQ
Power
Measurement #1
HR-MS2 ->
HR-MS1
Power
Measurement #2
HR-MS1 ->
HR-MS2
Power measurement #1
RSP
P
Power measurement #2 RS
Power Control
Algorithm
(Adjustment Range)
stment #1
Power Adju d
Comman
Power Adjustmen
t #2
Command
Power
Control
Algorithm #1 for
Measurement
Power
Adjustment
RSP
Power Adjustment
RSP
Power
Control
Algorithm #2 for
Measurement
Power
Adjustment
Algorithm #1
Power
Adjustment
ACK
Power Adjustment
ACK
Power
Adjustment
Algorithm #2
Power Control
Algorithm
tment #1
Power Adjus
d
an
m
Com
Power Adju
stment #2
Command
HR-MS1-to- HR-MS2 communication with new power level of
HR-MS1 Forwarding
IEEE C80216n-11/0214r3
====================End of Proposed Text====================
References
[1] IEEE 802.16n-11/0024, “P802.16n Draft AWD”, Oct. 2011.