IEEE C80216m-09_2476
Project
IEEE 802.16 Broadband Wireless Access Working Group <http://ieee802.org/16>
Title
Proposal on ABS’ response to the received ranging code (15.2.15.3.1)
Date
Submitted
2009-11-06
Source(s)
Youngkyo Baek
Jaehyuk Jang
Jungje Son
E-mail:
Phone :
youngkyo.baek@samsung.com
+82-31-279-7321
*<http://standards.ieee.org/faqs/affiliationFAQ.html>
Samsung Electronics
Re:
Call for LB #30a on “ P802.16m/D2”:
Target topic: “15.2.15.3.1”
Abstract
This contribution proposes modification for ABS’s response to the received ranging code to be
included in the 802.16m amendment.
Purpose
To be discussed and adopted by TGm for the IEEE 802.16m amendment
Notice
Release
Patent
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IEEE C80216m-09_2476
Proposal on ABS’ response to the received ranging code (15.2.15.3.1)
Youngkyo Baek Jaehyuk Jang, Jungje Son
Samsung Electronics
1. Introduction
Per 16m/D2, when ABS receives the IR access, it responds to the IR access by AAI_RNG-ACK only. It
could be helpful if many IR accesses are detected in a UL AAI subframe. However, for example, if ABS
decodes only one IR access successfully in a UL AAI subframe, then AAI_RNG-RSP(i.e. 16e’s way) is
more efficient than AAI_RNG-ACK. Hence if the AAI_RNG-RSP can be transmitted for each IR access
decoded successfully by the predefined DL AAI subframe, then we suggest using AAI_RNG-RSP instead of
AAI_RNG-ACK. Additionally if the ranging status is ‘success’, then we suggest that AAI_RNG-RSP
should be omitted if the UL BW allocation is provided by CDMA_allocation AMAP IE by the predefined
DL AAI subframe.
2. Text Proposal
Modify the sentences as follows (Page221, line 13)
======================== Start of Proposed Text #1=====================
• The ABS should respond with an AAI_RNG-ACK message in a predefined, subsequent DL AAI
subframe or with an AAI_RNG-RSP message by the predefined, subsequent DL subframe as define
in 15.2.3.18. The AAI_RNG-ACK message provides responses to all the successfully received and
decoded IR requests in initial ranging slots in a previous UL AAI subframe.
In case that ABS sends AAI_RNG-RSP for every IR accesses decoded successfully by the
predefined subsequent DL AAI subframe, it should omit to send AAI_RNG-ACK message.
Moreover, when ABS responds to the IR request, if the ranging status is ‘success’ and ABS sends
CDMA Allocation A-MAP IE for the AMS to send AAI_RNG-REQ by the predefined subsequent
DL AAI subframe, it should omit to send AAI_RNG-RSP message to the IR request.
If the AMS finds in the RNG-ACK bitmap that no initial ranging sequence has been successfully
decoded in the ranging slot selected by the AMS, or it does not find any response (e.g. response in
the AAI_RNG-ACK message, AAI_RNG-RSP message or CDMA Allocation A-MAP IE) to its IR
access attempt, the AMS considers its initial ranging request is failed and restarts the initial ranging
procedure. If AMS finds AAI_RNG-RSP or CDMA Allocation A-MAP IE as response to its IR
access by the predefined DL AAI subframe, AMS shall not care about AAI_RNG-ACK message.
•To successfully receive an IR request, there are three possible responses from ABS to AMS
provided in the AAI_RNG-ACK or AAI_RNG-RSP message:
1)IR continue: the ABS provides the needed adjustments (e.g., time, power, and possibly frequency
corrections) and a status notification of "continue".
2)IR success: the ABS provides a status notification of "success", and has no adjustment suggestions
IEEE C80216m-09_2476
to the AMS. In this case, the ABS shall provide the AMS an UL BW allocation for the AMS to send
AAI RNG-REQ message.
3)IR abort: the ABS requests the AMS to abort the ranging process.
•Upon receiving a Continue status notification and parameter adjustments in the AAI_RNG-ACK or
AAI_RNG-RSP message, the AMS shall adjust its parameters accordingly and continue the ranging
process as done on the first entry (using random selection rather than random backoff) with ranging
sequences randomly chosen from the initial ranging domain sent on the initial ranging region.
============================== End of Proposed Text#1 ===============
Modify the figure 443 as follows (Page 218 figure 443)
======================== Start of Proposed Text #2=====================
IEEE C80216m-09_2476
Establish DL sync
/Got DL&UL parameters,
and network not selected
(T3 expired and retries
exhausted) or (received
AAI_RNG-RSP(abort))
or (received AAI_RNGACK(abort))
Acquire
System
Information
Establish DL sync
/ Got DL&UL parameters,
and network selected
Wait for
ranging
opportunity
Got ranging
opportunity/ Send
Initial ranging code
Wait for
AAI_RNGACK,AAI_R
NG-RSP or
CDMA
allocation AMAP IE
T3 expired and
have more retries
Received
AAI_RNGACK(continue),
AAI_RNGRSP(continue)
or T3 expired
Got CDMA Allocation IE/
Send AAI_RNG-REQ
Wait for
AAI_RNGRSP with
temporary
STID
(T3 expired and retries
exhausted) or (received
AAI_RNG-RSP(abort))
Got AAI_RNG-RSP(success) with
temporary STID /
Send AAI_SBC-REQ
T18 expired and have more
retries/ Send AAI-SBC-REQ
Wait for
AAI_SBCRSP
(T18 expired and
retries exhausted) or
(received AAI_RNGRSP(abort) from ABS)
got AAI_SBCRSP and if
Auth. supported
got AAI_SBCRSP and if
Auth. not
supported, send
AAI_REG-REQ
AMS
authorization
and key
exchange
(T17 expires and
retries exhausted) or
(received AAI_RNGRSP(abort) from ABS)
Authenticated/ Send
AAI_REG-REQ
T6 expired and have more
retries/ Send AAI_REG-REQ
Wait for
AAI_REGRSP with
STID
(T6 expires and retries
exhausted) or ( AAI_RNGRSP(abort) or AAI_RESCMD from ABS
Got AAI_REG-RSP/
Handle AAI_REG-RSP
Default
service flow
setup &
NW entry
completed
(AAI_RNG-RSP(Abort) or
AAI_DREG-CMD or
AAI_RES-CMD from ABS
IEEE C80216m-09_2476
============================== End of Proposed Text#2 ===============
Modify the figure 443 as follows (Page 219 figure 444)
======================== Start of Proposed Text #3=====================
Got initial ranging code /
Send AAI_RNG-ACK(continue)
or AAI_RNG-RSP(continue)
Wait for
initial
ranging code
Got initial ranging code /
Send AAI_RNG-ACK(success) or AAI_RNGACK(success),
and Send CDMA Allocation A-MAP IE
Wait for
AAI_RNGREQ
AMS Ranging Response
Processing Time expired
Wait for
AAI_SBCREQ
Send AAI_RNG-RSP(abort)
AMS
authorization
and key
exchange
Send AAI_RNG-RSP(abort)
Got initial ranging code/
Send AAI_RNG-ACK
(abort) or AAI_RNGRSP(abort)
Got AAI_RNG-REQ/
Send AAI_RNG-RSP(success)with
temporary STID
Got AAI_RNG-REQ/Handle AAI_RNG-REQ
retx (Send AAI_RNG-RSP(success) with
temporary STID
Auth. Supported,
Got AAI_SBC-REQ/
Send AAI_SBC-RSP
Auth. Not supported,
Got AAI_SBC-REQ/
Send AAI_SBC-RSP
Got AAI_SBC-REQ/
Handle AAI_SBC-REQ
retx(i.e.,Send AAI_SBC-RSP)
END
Authenticated
Send AAI_RNG-RSP(abort)
or AAI_RES-CMD
Auth. Not supported,
Got AAI_SBC-REQ/Handle AAI_SBCREQ re-tx (i.e.,Send AAI_SBC-RSP)
Wait for
AAI_REGREQ
Got AAI_REG-REQ/ Send
AAI_REG-RSP with STID*
Got AAI_REG-REQ/
Handle AAI_REG-REQ retx(i.e.,Send
AAI_REG-RSP with STID)
Send AAI_RNG-RSP(abort)
or AAI_RES-CMD
Wait for
ACK for
AAI_REGRSP
Got Implicit or explicit
ACK for AAI_REG-RSP
Establish
connection/
NW entry
completed
Send AAI_RNG-RSP(abort),
AAI_RES-CMD or
AAI_DREG-CMD
============================== End of Proposed Text#3 ===============
IEEE C80216m-09_2476
4. References
[1] IEEE P802.16 Rev2 / D9, “Draft IEEE Standard for Local and Metropolitan Area Networks: Air
Interface for Broadband Wireless Access,”
[2] IEEE 802.16m-07/002r8, “802.16m System Requirements Document (SRD)”
[3] IEEE 802.16m-08/003r9, “The Draft IEEE 802.16m System Description Document”
[4] IEEE 802.16m-08/043, “Style guide for writing the IEEE 802.16m amendment”
[5] IEEE 802.16m-09/0010R2, “IEEE 802.16m Amendment Working Document”