Transcript IEEE S802.16j-07/508

RSRTG allowance modification
IEEE 802.16 Presentation Submission Template (Rev. 9)
Document Number:
IEEE S802.16j-07/508
Date Submitted:
2007-09-09
Source:
David Comstock
E-mail:
[email protected]
Huawei Technologies
*<http://standards.ieee.org/faqs/affiliationFAQ.html>
Venue:
LB#28/IEEE P802.16j/D1
Base Contribution:
None
Purpose:
For information pertaining to Comment #1 in LB28_Comstock_David commentary file
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RSRTG allowance modification
802.16e SSRTG/SSTTG allowances
The BS shall not:
·
Transmit DL information to a station later than (SSRTG+RTD) before the
beginning of its first scheduled UL allocation in any UL subframe
·
Transmit DL Information to it earlier than (SSTTG–RTD) after the end of the last
scheduled UL allocation, where RTD denotes round-trip delay
·
In addition, the SS should be allowed to receive the DL preamble for each frame
that contains DL data for it by assuring the period specified above does not
overlap with the preamble
T
T
G
BS rcv window for MS1
MS1 xmt window
Last point to rcv from MS1
pr
R /
Tm
G a
p
SS-TTG
T
T
G
BS xmt window for
MS1
MS1 rcv window
MS1 receives
preamble/control
SSRTG
BS rcv window for MS1
MS1 xmt window
Last point to xmt to MS1
RTD/2
BS UL subframe
RTD/2
RTD/2
BS DL subframe
RTD/2
RTD/2
BS UL subframe
SSTTG – RTD
SSRTG + RTD
RTD/2
RTD/2
SSTTG – RTD
R
T
G
pr
/
m
a
p
SS-TTG
RSRTG ofallowance
modification
Beginning
MS’s first scheduled
UL allocation is flexible
802.16e SSRTG/SSTTG allowances
Allows rcv window to start at
beginning of UL subframe
Short xmt window
SSRTG + RTD
pr
BS rcv window for MS1
MS1 xmt window
MS1 rcv window
SS-TTG
Case 2: First scheduled UL allocation
delayed from start of UL Subframe
0 gap required
pr
RTD/2
RTD/2
BS rcv window for MS1
R /
Tm
G a
p
MS1 xmt window
SS-TTG
BS UL subframe
MS1 receives preamble/control
MS1 xmt window
SSRTG + RTD
SS-TTG
0 gap required
pr
T
T
G
BS xmt window for
MS1
MS1 rcv window
R /
Tm
G a
p
BS rcv window for MS1
SSRTG
RTD/2
T
T
G
pr
T
T
G
BS xmt window
for MS1
BS rcv window for MS1
RTD/2
R /
Tm
G a
p
RTD/2
T
T
G
0 gap required
SSRTG
BS DL subframe
Xmt window may be longer
R /
Tm
G a
p
MS1 xmt window
RTD/2
0 gap required
RTD/2
Case 1: First scheduled UL allocation
may be at start of UL Subframe
SS-TTG
BS UL subframe
Rcv window delayed from start
of UL subframe using ranging
RSRTG allowance modification
The RS shall not:
Transmit downlink information to SSs later than RSTTG-RTD/2 before the
beginning of DL relay zone
· Receive uplink information from its SS later than RSRTG+RTD/2 before the
beginning of the UL relay zone
·
BS DL subframe
BS AZ
pr
R /
Tm
G a
p
BS UL subframe
BS RZ
BS
AZ
Tr
BS RZ Tr
(xmt window)
RS must receive control
msgs at beginning of RZ
BS AZ
T
T
G
BS RZ
pr
BS
AZ
Re
BS RZ Re
(rcv window)
R /
Tm
G a
p
BS
AZ
Tr
Beginning of
UL relay zone
Last point to
receive from SS
RSTTG-RTD/2)
pr
/ RS1
m AZ
a
p Tr
RSTTG
RS1 RZ Re
(rcv window)
For larger RTD/2 Access Zone will becomes smaller
RS1
AZ
Re
RSRTG
RS1 RZ Tr
(xmt window)
pr
/ RS1
m AZ
a
p Tr
RSRTG+RTD/2
BS should delay first UL allocation for RS1 and use ranging to
change RS1 xmt window
RSRTG allowance modification
BS DL subframe
The RS shall not:
· Receive uplink information from its SS
later than RSRTG+RTD/2 before the
beginning of the UL relay zone
BS AZ
pr
R /
Tm
G a
p
BS UL subframe
BS RZ
BS
AZ
Tr
BS RZ Tr
(xmt window)
BS AZ
T
T
G
BS RZ
pr
BS
AZ
Re
BS RZ Re
(rcv window)
Last point to
receive from SS
pr
/ RS1
m AZ
a
p Tr
The RS shall not:
· Receive uplink information from its
SS later than RSRTG+RTD/2 before
the beginning of the UL relay zone
the RS's first scheduled UL allocation
of a transmit mode UL relay zone
pr
R /
Tm
G a
p
RSTTG
BS
AZ
Tr
RS1 RZ Re
(rcv window)
BS RZ Tr
(xmt window)
RS1
AZ
Re
BS AZ
R / BS
T m AZ
G a
p Tr
Beginning of
UL relay zone
RSRTG
RS1 RZ Tr
(xmt window)
pr
/ RS1
m AZ
a
p Tr
pr
T BS
T AZ
G Re
BS RZ Re
(rcv window)
R / BS
T m AZ
G a
p Tr
Beginning of
first scheduled
UL allocation
UL allocation delayed to allow
larger RS1 AZ in UL subframe
RSTTG-RTD/2)
pr
/ RS1
m AZ
a
p Tr
RSTTG
RS1 RZ Re
(rcv window)
Last point to receive from SS
RS1
AZ
Re
RSRTG
RS1 RZ Tr
(xmt window)
RSRTG+RTD/2
pr
/ RS1
m AZ
a
p Tr