IEEE C802.16m-09/2092
Project
IEEE 802.16 Broadband Wireless Access Working Group <http://ieee802.org/16>
Title
Proposed text for basic support of ARS frame structure (Relay)
Date
Submitted
2009-08-30
Source(s)
Alexander Maltsev, Jerry Sydir,
Alexey Khoryaev, Andrey
Chervyakov, Honggang Li, Mikhail
Shilov
e-mail: alexander.maltsev@intel.com
Intel Corporation
Re:
Call for Contributions on Project 802.16m Amendment Content: IEEE802.16m09/0037
P802.16m/D1 topic: Relay
Abstract
This contribution mainly proposes frame structure for relays support
Purpose
To be discussed and adopted by TGm for 802.16m amendment working document.
Notice
Release
Patent
Policy
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.
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.
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>.
1
IEEE C802.16m-09/2092
Proposed Text for Basic Support of ARS Frame Structure
Alexander Maltsev, Jerry Sydir,
Alexey Khoryaev, Andrey Chervyakov, Mikhail Shilov
Intel Corporation
1. Introduction
This contribution proposes amendment text describing basic support of ARSs in frame structure and to be
included in the 802.16m amendment draft [5]. The proposed text is developed so that it is compliant to the
802.16m SRD [2] and the 802.16m SDD [3], and it follows the style and format guidelines in [4]. Current
SDD [3] is used as a basis for the text development.
This contribution proposes frame structure to support operation of relay stations. The design of relay
specific frame structure is based on the latest version of SDD. The following principles are applied. The
ABS and ARS superframes/frames are time aligned and the main control channels such as SFH, Preamble
and MIMO midamble are transmitted synchronously by the ABS and the ARS in order not to confuse
associated AMSs. A time-division transmit and receive relaying frame structure is proposed. Each of ABS
and ARS frames is divided into Access zones, where ABS and ARS are allowed to communicate with AMS
associated to these stations, and Relay zones, where ABS and ARS are allowed to communicate with each
other. When ARSs are supported the additional transition gaps (R-TTI and R-RTI) are introduced in the
relay zones to make allowances for signal propagation delay on relay links and ARS RF circuitry
switching.
2. References
[1] IEEE P802.16Rev2/D9a, “Draft IEEE Standard for Local and Metropolitan Area Networks: Air
Interface for Broadband Wireless Access,” March 2009.
[2] IEEE 802.16m-07/002r8, “802.16m System Requirements”
[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 P802.16m/D1, “Part 16: Air Interface for Fixed and Mobile Broadband Wireless Access Systems
– DRAFT Amendment to IEEE Standard for Local and metropolitan area networks”
2
IEEE C802.16m-09/2092
3. Text proposal for inclusion in the P802.16m/D1
============================= Start of Proposed Text ==============================
3. Definitions
[Insert the following definitions:]
3.x1 16m (DL/UL) Access Zone: An integer multiple of subframes located in the MZone of the ABS frame
or ARS frame, where an ABS or ARS can transmit to the AMSs or receive from AMSs.
3.x2 16m Relay Zone: An integer multiple of subframes located in the MZone of the ABS frame, where an
ABS can transmit to the ARSs and/or AMSs or receive from ARSs and AMSs, or ARS frame, where an
ARS can transmit to the ABS or receive from ABS.
3.x3 16m DL Transmit Zone: An integer multiple of subframes located in the MZone of the DL of the
ABS frame, where an ABS can transmit to subordinate ARSs and the AMSs.
3.x4 16m UL Transmit Zone: An integer multiple of subframes located in the MZone of the UL of the
ARS frame, where a ARS can transmit to its superordinate ABS.
3.x5 16m DL Receive Zone: An integer multiple of subframes located in the MZone of the DL of the ARS
frame, where a ARS can receive from its superordinate ABS.
3.x6 16m UL Receive Zone: An integer multiple of subframes located in the MZone of the UL of the ABS
frame, where an ABS can receive from its subordinate ARSs and the AMSs.
3.x7 ARS transmit/receive transition gap (ARS-TTG): The minimum transmit-to-receive turnaround
gap required at an ARS. ARS-TTG is measured from the time of the last sample of the transmitted burst to
the first sample of the received burst at the antenna port of the ARS.
3.x8 ARS receive/transmit transition gap (ARS-RTG): The minimum receive-to-transmit turnaround
gap required at an ARS. ARS-RTG is measured from the time of the last sample of the received burst to the
first sample of the transmitted burst at the antenna port of the ARS.
3.x9 round trip delay (RTD): The round trip delay time between communicating stations (i.e. such as
between an ARS and its superordinate station).
[Insert the following at the subclause 15.3.3.6:]
15.3.3.6 Relay support in frame structure
15.3.3.6.1 Basic frame structure supporting ARSs
The advanced air interface supports two hop data transmission between ABS and AMS using an
intermediate ARS. Figure 1 shows an example of the basic frame structure for system supporting ARSs.
When an ARS is deployed it shall use the same OFDMA signal parameters (defined in Table 647) as its
serving ABS. The ABS and ARS superframes shall be time aligned and shall consist of the same number of
frames and subframes. Every ARS superframe shall contain a superframe header (SFH). The SFH
transmitted by ARS shall have the same location and format as the SFH transmitted by ABS. The ARS
preambles (SA-Preamble and PA-Preamble) shall be transmitted synchronously with corresponding ABS
preambles.
When ARSs are supported the ABS frame is divided on 16m Access zone and 16m Relay zone. The 16m
Access zone position precedes the 16m Relay zone position inside the frame. The duration of the 16m
3
IEEE C802.16m-09/2092
Access zone and 16m Relay zone shall be the same at each frame of the superframe and may be changed
on the superframe boundaries. The duration of the 16m Access zone and 16m Relay zone may be different
in DL and UL directions. The zone configuration of 16m Access zone and 16m Relay zone is informed to
the ARS using RS configuration message from the ABS.
The ABS frame 16m Access zone shall consist of 16m DL Access zone and 16m UL Access zone, and 16m
Relay zone shall consist of 16m DL Transmit zone and 16m UL Receive zone. The ABS 16m Access zone
shall be used for communication with AMSs only. The ABS 16m Relay zone shall be used for
communication with ARSs and may be used for communication with AMSs. In the 16m DL Transmit zone
the ABS shall transmit to its subordinate ARS and in the 16m UL Receive zone the ABS shall receive
transmissions from its subordinate ARS.
The ARS frame 16m Access zone shall consist of 16m DL Access zone and 16m UL Access zone and 16m
Relay zone shall consist of 16m DL Receive zone and 16m UL Transmit zone. The ARS 16m Access Zone
shall be used for communication with AMSs only. In the 16m DL Receive zone the ARS shall receive
transmissions from its superordinate ABS and in the 16m UL Transmit zone the ARS shall transmit to its
superordinate ABS.
In each ARS frame, the relay transmit to receive transition interval (R-TTI) shall be inserted between 16m
DL Access and 16m DL Receive zone in order to make allowances for ARSTTG and RTD between the
ARS and its superordinate station. The duration of R-TTI shall be equal to zero or to the duration of one
OFDMA symbol. If the R-TTI duration is equal to one OFDMA symbol, then in 16m DL Transmit/Receive
zones specific data transmissions mapping described in Section 15.3.5.6.x shall be used.
In each ARS frame, the relay receive to transmit transition interval (R-RTI) may be inserted between 16m
UL Access and 16m UL Transmit zone in order to make allowances for ARSRTG and RTD between the
ARS and its superordinate station. The duration of R-RTI shall be equal to the duration of one OFDMA
symbol. In the 16m UL Receive/Transmit zones specific data transmissions mapping described in Section
15.3.8.6.x shall be used.
ABS
Transmission
Superframe 20 ms
SU0
SU1
SU2
SU3
Frame 5 ms
F0
F1
F2
F3
Subframe
SF0 SF1 SF2 SF3 SF4 SF5 SF6 SF7
SF0 SF1 SF2 SF3 SF4 SF5 SF6 SF7
ARS
Transmission
Frame 5 ms
F0
SU0
F1
SA-Preamble
PA-Preamble
F2
SU1
Superframe header
F3
SU2
SU3
Superframe 20 ms
Figure 1 – Super-frame structure for system with ARS support
4
IEEE C802.16m-09/2092
When ARS is supported the long TTI allocations shall span the entire 16m Access zone or 16m Relay zone
in any of DL or UL directions depending on where data transmission is allocated.
15.3.3.6.2 TDD mode frame structure
The TDD frame shall be constructed on the basis of the basic frame structure defined in Sections 15.3.3.1,
15.3.3.2, 15.3.3.3 and 15.3.3.6.1.
The number of switching points in each radio ARS frame in TDD systems shall be two. An ARS radio
frame shall include an R-TTI and R-RTI as described in section 15.3.3.6.1.
Figure 2 illustrates an example frame structure with ARS support for TDD mode D:U = 5:3, which is
applicable to the nominal channel bandwidth of 5, 10, 20 MHz with G = 1/16. The number of subframes
allocated to the Relay zone in DL direction is two and in UL direction is one. The R-TTI and R-RTI
duration is equal to the duration of one OFDMA symbol. TDD frame structure configurations for different
DL/UL rations, CP sizes, and channel bandwidths are similar in form, but differ in terms of the number of
types of subframes that make up the different zones of the frame.
TDD Frame: 5 ms
TTG
RTG
Access Zone
Relay Zone
16m DL Receive
Zone
16m UL Access
Zone
DL
SF0 (6)
UL
SF7 (7)
UL
SF6 (6)
UL
SF5 (6)
DL
SF4 (6)
R-RTI
DL
SF3 (6)
DL
SF2 (6)
DL
SF1 (7)
DL
SF0 (7)
ARS
Frame
R-TTI
16m DL Access
Zone
DL
SF0 (6)
16m UL
Receive
Zone
UL
SF7 (7)
UL
SF6 (6)
16m UL Access
Zone
UL
SF5 (6)
DL
SF4 (6)
DL
SF3 (6)
16m DL Transmit
Zone
DL
SF2 (6)
DL
SF1 (7)
DL
SF0 (6)
ABS
Frame
16m DL Access
Zone
16m UL
Transmit
Zone
Transition
gap
Figure 2 – Example frame structure with ARS support for 5, 10, 20 MHz TDD mode (G = 1/16)
15.3.3.6.3 FDD frame structure
The FDD frame shall be constructed on the basis of the basic frame structure defined in Sections 15.3.3.1,
15.3.3.2, 15.3.3.3 and 15.3.3.6.1.
An ARS supporting FDD mode shall communicate with the ABS using full duplex FDD mode and it shall
be able to simultaneously support half duplex and full duplex AMSs operating on the same RF carrier.
An ARS in FDD systems shall use DL carrier frequency (FDL) for receiving from the ABS in the 16m DL
Receive zone and shall use UL carrier frequency (FUL) for transmission to the ABS in the 16m UL Transmit
zone.
The ARS frame in FDD systems shall have one transition interval between 16m Access and 16m Relay
zones in each of DL and UL directions which is required to enable ARS transceiver state switching.
5
IEEE C802.16m-09/2092
Figure 3 illustrates an example frame structure with ARS support for FDD mode, which is applicable to the
nominal channel bandwidth of 5, 10, 20 MHz with G = 1/16. The number of subframes allocated to the
Relay zone in DL direction is three and in UL direction is two. The R-TTI and R-RTI duration is equal to
the duration of one OFDMA symbol. FDD frame structure configurations for different DL/UL rations, CP
sizes, and channel bandwidths are similar in form, but differ in terms of the number of types of subframes
that make up the different zones of the frame.
FDD Frame: 5 ms
DL
SF7 (7)
DL
SF7 (7)
DL
SF0 (6)
DL
SF6 (6)
16m DL Receive
Zone
UL
SF7 (7)
UL
SF0 (6)
UL
SF7 (7)
UL
SF0 (6)
UL
SF6 (6)
UL
SF5 (6)
UL
SF4 (7)
UL
SF3 (6)
UL
SF2 (6)
UL
SF1 (7)
UL
SF0 (6)
Idle
16m UL Receive
Zone
16m UL Access
Zone
ABS
Frame
DL
SF0 (6)
DL
SF5 (6)
DL
SF4 (7)
DL
SF3 (6)
DL
SF2 (6)
DL
SF1 (7)
DL
SF0 (6)
16m DL Access
Zone
16m UL Access
Zone
Access Zone
Relay Zone
UL
SF6 (6)
UL
SF5 (6)
UL
SF4 (7)
UL
SF3 (6)
UL
SF2 (6)
UL
SF1 (7)
UL
SF0 (6)
R-RTI
ARS
Frame
UL Transmission
(FUL)
DL
SF6 (6)
DL
SF5 (6)
DL
SF4 (7)
DL
SF3 (6)
DL
SF2 (6)
DL
SF1 (7)
DL
SF0 (6)
ABS
Frame
16m DL Transmit
Zone
R-TTI
ARS
Frame
DL Transmission
(FDL)
16m DL Access
Zone
16m UL Transmit
Zone
Transition
gap
Figure 3 – Example frame structure with ARS support for 5, 10, 20 MHz FDD mode (G = 1/16)
============================= End of Proposed Text ==============================
6