IEEE C802.16j-07/525r6
Project
IEEE 802.16 Broadband Wireless Access Working Group <http://ieee802.org/16>
Title
Comments on SS ranging and automatic adjustments for the RS group
Date
Submitted
2007-11-15
Source(s)
Kanchei (Ken) Loa, Yi-Hsueh Tsai,
Yung-Ting Lee, Hua-Chiang Yin,
Shiann-Tsong Sheu, Youn-Tai Lee
Voice: +886-2-27399616
Fax: +886-2-23782328
loa@iii.org.tw
Institute for Information Industry
8F, No. 218, Sec. 2, Dunhua S. Rd.,
Taipei City 106, Taiwan
Israfil Bahceci, Senarath Gamini, Peiying Voice: +613-763-1315
Zhu, Wen Tong, Mo Han Fong, Derek Yu, E-mail: wentong@nortel.com
David Steer, Mark Naden
E-mail: pyzhu@nortel.com
Nortel Networks
3500 Carling Avenue
Ottawa, Ontario K2H 8E9
Adrian Boariu
E-mail: adrian.boariu@nsn.com
Nokia Siemens Networks
[add other co-authors here]
Re:
IEEE 802.16j-07/043: “IEEE 802.16 Working Group Working Group Letter Ballot #28”
Abstract
This contribution proposes MS ranging and automatic adjustments for the RS group
Purpose
Text proposal for 802.16j Draft Document.
Notice
Release
Patent
Policy
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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.
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
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contributor also acknowledges and accepts that this contribution may be made public by IEEE 802.16.
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<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
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Comments on SS ranging and automatic adjustments for the RS group
0
IEEE C802.16j-07/525r6
Kanchei (Ken) Loa, Yi-Hsueh Tsai, Yung-Ting Lee, Hua-Chiang Yin, Shiann-Tsong Sheu, Youn-Tai Lee
Institute for Information Industry (III)
Introduction
The accepted contribution (IEEE C802.16j-07/459r6 Comments on SS ranging and network entry in transparent
and non-transparent mode) did not include MS ranging and automatic adjustments for the RS group. This
contribution proposes remedy for MS ranging and automatic adjustments for the RS group and covers the
following comments:
Comment#
673
683
subclauses
6.3.10.3.4.2.1
6.3.10.3.4.4.1
Authors
Gamini
Senarath
Gamini
Senarath
Type
Technical
Technical
Under the scenario that the superannuate station of a RS Group is a non-transparent RSs with unique BSIDs
operated in centralized scheduling mode. If the CDMA ranging code is received by both subordinate transparent
RSs and superordinate non-transparent RS, the transparent RSs must request uplink bandwidth to send
MR_Code-REP message to the non-transparent RS. As a result, the non-transparent RS will compare measured
signal information at each transparent RS to decide the most appropriate path to communicate with the code
originating MS. Then, the non-transparent RS must request downlink bandwidth for broadcasting RNG-RSP
message.
T-RS
MS
Latency
IR
BS
N-RS
Frame k
MS
IR
Dedicated BR
Frame k+1
UL-MAP
Frame k+2
RLY BR header
MR_Code-REP
Frame k+3
RS UL-MAP
RNS-RSP
T-RS
Dedicated BR
Latency
BS
Frame k+4
UL-MAP
Frame k+5
MR_Code-REP
Frame k+6
RS BR header
Frame k+7
RS DL-MAP
Frame k+8
RNS-RSP
Figure 1 Handling CDMA ranging
This contribution also proposes remedy for the accepted comment #0565 (contribution IEEE C802.16j-07/459r6
Comments on SS ranging and network entry in transparent and non-transparent mode) that has some mistakes
on start and stop timer. (see C802.16j-07/548)
In order to facilitate the incorporation of this proposal into IEEE 802.16j standard, specific changes to the draft
standard P802.16j/D1 are listed below.
Specification Changes
[Note: The text accepted in the previous meeting (comment #0565: document IEEE C802.16j-07/459r6) are
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IEEE C802.16j-07/525r6
marked in “Gray”]
[Delete 6.3.9.16.3.1.1 as following indicated:]
6.3.9.16.3.1.1 MS network entry procedures
Each RS group member shall monitor the CDMA ranging codes from subordinate nodes. If the group parent is
not a member of the RS group, then RS group members shall follow the procedures in 6.3.9.16.1. If the group
parent is a member of the RS group, then the RS group members other than the parent shall follow the
procedure in 6.3.9.16.1, and the parent (if not MR-BS) shall follow the procedures in 6.3.9.16.2.
6.3.10.3.1.1 MR-BS and RS behavior during contention-based initial ranging
[Modified the following paragraphs as indicated:]
When an SS performs initial ranging in systems with transparent RSs attached to MR-BSs directly, then MRBSs, and transparent RSs shall perform the following tasks:
— The RS shall monitor the Ranging Channel specified in the UL-MAP broadcasted by the MR-BS, for
initial ranging codes. When the RS detects one or more codes in a frame received on the access link, it
shall send the codes it receives with sufficient strength and their adjustment information (e.g. time, power,
frequency corrections) in an MR_Code-REP message on the RS basic CID to the serving MR-BS.
— When an MR-BS first receives a CDMA ranging code directly or via an MR_Code-REP message, it shall
set the T48 timer and wait for other MR_Code-REP messages to arrive with the same ranging code
attributes from other subordinate RSs. Once the T48 timer expires, the MR-BS shall determine the most
appropriate path (direct or via an RS) on which to communicate with the SS that originated the code.
Algorithms or policies to select the path are out of scope of this document.
— If adjustments are required, the MR-BS shall transmit the RNG-RSP to the SS and the process shall repeat.
When the ranging code requires no further adjustment, the MR-BS shall provide an allocation in the
access uplink for the SS to forward a RNG-REQ with its MAC address by inserting a
CDMA_Allocation_IE in the UL-MAP. If management messages are relayed on the uplink, the MR-BS
shall precede the CDMA_Allocation_IE with an UL_Burst_Receive_IE containing the access RS’s basic
CID or the multicast management CID. A transparent RS, whose CID matches the RS basic CID or the
multicast management CID of the UL_Burst_Receive_IE, shall receive the RNG-REQ on a burst specified
by the CDMA_Allocation_IE and relay it to the MR-BS on the RS basic CID.
[Insert the following paragraphs as indicated:]
When an SS performs initial ranging in systems with transparent RSs attached to superordinate station as nontransparent RS with unique BSID operated in centralized scheduling mode, then MR-BS, superordinate station,
and transparent RSs shall perform the following steps:
— The transparent RSs shall monitor the Ranging Channel specified in the UL-MAP broadcasted by the
superordinate station, for initial ranging codes. When the RS detects one or more codes in a frame
received on the access link, it shall send the codes it receives with sufficient strength and their adjustment
information (e.g. time, power, frequency corrections) in an MR_Code-REP message on the RS basic CID
to the serving superordinate station.
— When superordinate station first receives a CDMA ranging code directly or via an MR_Code-REP
message, it shall set the T48 timer and wait for other MR_Code-REP messages to arrive with the same
ranging code attributes from other subordinate RSs. Once the T48 timer expires, the superordinate station
shall forward the MR_Code-REP to the MR-BS, and the MR-BS shall determine the most appropriate
path (direct or via an RS) on which to communicate with the SS that originated the code. Algorithms or
policies to select the path are out of scope of this document.
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IEEE C802.16j-07/525r6
— If adjustments are required, the superordinate station shall request bandwidth on the access downlink on
which to send a RNG-RSP to the SS. When the ranging code requires no further adjustment, the
superordinate station shall request bandwidth on the access uplink on which the SS can transmit a RNGREQ containing its MAC address by following the procedure in 6.3.6.7.2.1.1.
[Insert the following paragraphs as indicated:]
When an SS performs initial ranging in systems with non-transparent RSs using shared BSIDs with other access
stations, then superordinate station (MR-BS or non-transparent RS with unique BSID operated in centralized
scheduling mode), and those non-transparent RSs with shared BSIDs shall perform the same steps as transparent
RSs with the following modifications:
— If management messages are relayed on the uplink, the MR-BS shall precede the CDMA_Allocation_IE
with an UL_Burst_Receive_IE, containing the access RS’s basic CID or multicast management CID, in
the RS_Access-MAP message sent to the RSs. The access RSs and superordinate station shall remove the
UL_Burst_Receive_IE when compose the (compress) UL-MAP which the RS broadcasted. A nontransparent RS, whose CID matches the RS basic CID or the multicast management CID of the
UL_Burst_Receive_IE, shall receive the RNG-REQ on a burst specified by the CDMA_Allocation_IE and
relay it to the MR-BS on the RS basic CID.
— If adjustments are required, the superordinate station shall transmit the RNG-RSP to the SS directly or to a
non-transparent RSs with the RS basic CID or the multicast management CID, which shall relay the
received RNG-RSP to the MS with the initial ranging CID.
[Modified the following figures as indicated:]
Wait for CDMA Ranging Code
CDMA Ranging Code
Start T48
Uplink bandwidth request to superordinate station
Wait for uplink bandwidth allocation
Timeout T48
Uplink bandwidth allocation
End
Stop T48
MR_Code-REP message to superordinate station
End
Figure 115a—Handling CDMA ranging code at a transparent RS
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IEEE C802.16j-07/525r6
[Inserted the following figures after Figure 115a:]
Wait for CDMA Ranging Code or MR_Code-REP message
CDMA Ranging Code or MR_Code-REP message
Start T48
Wait for MR-Code-REP message with
matching ranging code attributes
MR-Code-REP message with
matching ranging code attributes
Timeout T48
Select the designated access station
for the ranging code attributes
Bandwidth request
No
Ranging purpose?
Need adjustment?
End
Initial/Handover
Periodic
Yes
Perform periodic ranging
Perform Initial/handover ranging
(a) Handling MR_Code-REP message
Perform initial/handover ranging
Start T3
No
Good Enough?
Yes
(Note)
RS BR header or dedicated CDMA code to MR-BS
MR-Code-REP header to MR-BS
Wait for RS_BW-ALLOC_IE
Timeout T3
RS_BW-ALLOC_IE
End
Stop T3
Wait for CDMA_Allocation-IE
with zeroed out fields
RS_BW-ALLOC_IE
abort
success
status?
Timeout T3
End
CDMA_Allocation-IE
with zeroed out fields
Stop T3
Stop T3
continue
continue or abort?
fill in the corresponding information
into CDMA_Allocation-IE
abort
RNG-RSP with status
= 1 (continue) to MS
RNG-RSP with status
= 2 (abort) to MS
Wait for CDMA Ranging Code
End
RNG-RSP with status
= 3 (success) to MS
CDMA_Allocation-IE
Wait for RNG-REQ
(b) Handling initial/handover ranging
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IEEE C802.16j-07/525r6
Perform periodic ranging
Start T3
RS BR header or dedicated CDMA code to MR-BS
Wait for RS_BW-ALLOC_IE
Timeout T3
RS_BW-ALLOC_IE
End
Stop T3
continue
Status?
sucess
abort
RNG-RSP with status
= 1 (continue) to MS
RNG-RSP with status
= 2 (abort) to MS
RNG-RSP with status
= 3 (success) to MS
Wait for CDMA Ranging Code
End
End
(c) Handling periodic ranging
Figure 115a-1—Handling CDMA ranging code or MR_Code-REP message at a non-transparent RS w/unique
BSID under centralized scheduling attached with transparent RSs
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IEEE C802.16j-07/525r6
[Modified “the start/stop timer” in the following figures as indicated:]
Wait for CDMA Ranging Code
Initial/Handover Ranging Code
Start T3
No
Good Enough?
Yes
(Note)
RS BR header or dedicated CDMA code to MR-BS
MR-Code-REP header to MR-BS
Wait for RS_BW-ALLOC_IE
Timeout T3
RS_BW-ALLOC_IE
End
Stop T3
Wait for CDMA_Allocation-IE
with zeroed out fields
RS_BW-ALLOC_IE
abort
Timeout T3
success
status?
CDMA_Allocation-IE
with zeroed out fields
End
Stop T3
Stop T3
continue
continue or abort?
fill in the corresponding information
into CDMA_Allocation-IE
abort
RNG-RSP with status
= 1 (continue) to MS
RNG-RSP with status
= 2 (abort) to MS
Wait for CDMA Ranging Code
End
RNG-RSP with status
= 3 (success) to MS
CDMA_Allocation-IE
Wait for RNG-REQ
Figure 115b—Handling CDMA initial ranging code at a non-transparent RS w/unique BSID under centralized
scheduling
Wait for RNG-REQ containing MS MAC address with ranging CID
RNG-REQ containing MS MAC address
Start T3
RNG-REQ with RS basic CID to MR-BS
Wait for RNG-RSP containing matching
MAC address with ranging CID
Timeout T3
RNG-RSP with matching MAC address
End
Stop T3
End
Figure 115f—Handling RNG-REQ at a transparent RS
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IEEE C802.16j-07/525r6
Wait for RNG-REQ containing MS MAC address with ranging CID
RNG-REQ containing MS MAC address
Start T3
RNG-REQ with RS basic CID to MR-BS
Wait for RNG-RSP containing matching
MAC address with ranging CID
Timeout T3
RNG-RSP with matching MAC address
End
Stop T3
RNG-REQ with ranging CID to MS
End
Figure 115g—Handling RNG-REQ at a non-transparent RS with a unique BSID except local CID allocation
mode
Wait for CDMA Ranging Code
Bandwidth Request Ranging Code
No
Need adjustment?
End
Periodic Ranging Code
Yes
Start T3
RS BR header or dedicated CDMA code to MR-BS
Wait for RS_BW-ALLOC_IE
Timeout T3
RS_BW-ALLOC_IE
End
Stop T3
continue
Status?
sucess
abort
RNG-RSP with status
= 1 (continue) to MS
RNG-RSP with status
= 2 (abort) to MS
RNG-RSP with status
= 3 (success) to MS
Wait for CDMA Ranging Code
End
End
Figure 118a Handling CDMA ranging code at a non-transparent RS w/unique BSID under centralized
scheduling
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IEEE C802.16j-07/525r6
Wait for Upstream Data
Upstream Data
Require correction?
Yes
RS BR header to MR-BS
No
End
Start T55
Wait for RS_BW-ALLOC_IE
Timeout T55
RS_BW-ALLOC_IE
Stop T55
continue
Status?
success
RNG-RSP with status
= 1 (continue) to MS
abort
RNG-RSP with status
= 2 (abort) to MS
RNG-RSP with status
= 3 (success) to MS
End
End
End
Figure 118c—SS upstream transmission adjustment at a non-transparent RS w/unique BSID under centralized
scheduling
8