backward compatible fdd 802.16m frame structure for full-duplex and half-duplex ms operations...
DESCRIPTION
Full-duplex FDD Frame Structure for the Coexistence with FDD-based Legacy Systems Time length and channel bandwidth shown here is just an example One preamble per radio frame 16m preamble is shifted from legacy preamble by a fix number of OFDM symbols A radio frame is divided into two permutation zones Each permutation zone has its own MAP –MAP information of current zone determines resource allocation of next zone in uplink band –Contention channel Ranging channel is added for synchronization and channel estimationTRANSCRIPT
Backward Compatible FDD 802.16m Frame Structure for Full-Duplex and Half-Duplex MS Operations
Document Number: S802.16m-08/031r2Date Submitted:
January 16, 2008Source: Pei-Kai Liao ([email protected], [email protected]) , I-Kang Fu, Chih-Yuan Lin, Ciou-Ping Wu and Paul Cheng ([email protected])
MediaTek Inc. No. 1 Dusing Rd. 1 Hsinchu Science Park Hsinchu City 300 Taiwan.
Venue:Levi, Finland
Base Contribution:IEEE C802.16m-08/031r1
Purpose:Propose to be discussed and adopted by TGm for the use in Project 802.16m SDD.
Notice: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.
Release: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.
Patent Policy: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 >.
S802.16m-08/031r2
Introduction
• Motivation– In “Section 5.6 Duplex Schemes” of SRD, it says:
• IEEE 802.16m shall support both Time Division Duplex (TDD) and Frequency Division Duplex (FDD) operational modes. The FDD mode shall support both full-duplex and half-duplex MS operation. Specifically, a half-duplex FDD (H-FDD) MS is defined as an FDD MS that is not required to transmit and receive simultaneously.
– FDD frame structure is not stated clearly in C802.16m-08/118r1, especially for legacy support
– Some design ideas of TDD frame structure can be applied but not all– There are many discussions about FDD frame structure in WiMAX Forum,
which means 802.16 standard doesn’t provide clear description for it
• Purpose and Summary– Propose to be discussed and included in C802.16m-08/118r1– FDD frame structure designs are proposed for both full-duplex and half-duplex
MS operations
Full-duplex FDD Frame Structure for the Coexistence with FDD-based Legacy Systems
• Time length and channel bandwidth shown here is just an example
• One preamble per radio frame
• 16m preamble is shifted from legacy preamble by a fix number of OFDM symbols
• A radio frame is divided into two permutation zones
• Each permutation zone has its own MAP
– MAP information of current zone determines resource allocation of next zone in uplink band
– Contention channel• Ranging channel is
added for synchronization and channel estimation
802.16m Mode DL
Legacy Mode DL
802.16m Mode DL
802.16e Preamble
FCH
DL-MAP
UL-MAP
MAP, etc.
2.5 ms
512
Configurable
802.16m Mode UL
Guard tones
802.16m Mode DL
802.16m Mode DL
Legacy Mode DL
Guard tones
2048
20 M
Hz
802.16m Mode UL
2.5 ms
1024
10 M
Hz
1024
10 M
Hz
Legacy Mode UL
802.16m Mode UL
Guard tones51
2
Legacy Mode UL
802.16m Mode UL
Guard tones
1024
10 M
Hz
Preamble
MAP, etc.
Ranging Channel or Preamble
Half-duplex FDD Frame Structure for the Coexistence with FDD-based Legacy Systems
• Time length and channel bandwidth shown here is just an example
• One preamble per radio frame
• Users are divided into three user groups to increase cell throughput
– User group A– User group B– Legacy users
• Staggered sub-frame design is used to separate the downlink/uplink timing for user group A/B
• Each user group (A or B) has at least one DL/UP cycle in one radio frame
Guard tones
802.16m Mode UL (User Group B)
802.16m Mode DL (User Group A)
Legacy Mode DL (Legacy Users)
802.16e Preamble
FCH
DL-MAP
UL-MAP
MAP, etc.
2.5 ms
512
5 M
Hz
Configurable
802.16m Mode DL
(User Group A)
Guard tones
2048
20 M
Hz
2.5 ms
1024
10 M
Hz
1024
10 M
Hz
802.16m Mode UL (User Group A)
512
5 M
Hz
Legacy Mode UL(Legacy Users)
802.16m Mode UL(User Group A)
Guard tones
1024
10 M
Hz
MAP, etc.
802.16m Mode UL (User Group B)
2.5 ms
ConfigurableConfigurable
802.16m Mode DL (User Group B)
802.16m Mode DL (User Group B)
1.25 ms 1.25 ms
MAP, etc.
MAP, etc.
802.16m Mode DL
(User Group A)
Ranging Channel or Preamble
Preamble (shared by Group A and B)
Legacy Mode DL
(Legacy Users)
802.16m Mode DL
(User Group B)
TTG2 OFDM Symbols1 OFDM Symbol
0.5 OFDM Symbol
RTG
Proposed Text for Full-duplex MS Operation
• Details are referred to C802.16m-08/031r1
16m DLsub-frame
16m SuperFrame n
16m Radio Frame …...16m Radio Frame
Superframe n-1
Legacy 5ms frame Legacy 5ms Frame …...
16m sync signal
16e preamble
Legacy DL subframe
Legacy UL subframe
16m ULsub-frame
Legacy UL subframe
…... U L
s u b - f r
16m sync signal
16e preamble
16e preamble
Legacy MS’s view
16m MS’s view
16m BS’s view16m DL
sub-frame DownlinkChannel
UplinkChannel
Legacy DL subframe
Legacy DL subframe
Legacy DL subframe
Legacy UL subframe
16m ULsub-frame
16m DLsub-frame
16m DLsub-frame
16m ULsub-frame
16m ULsub-frame
Legacy UL subframe
D L
s u b - f r…...
Legacy DL subframe
Legacy UL subframe
Legacy UL subframe
…... U L
s u b - f r
DownlinkChannel
UplinkChannel
Legacy DL subframe
Legacy DL subframe
Legacy DL subframe
Legacy UL subframe
Legacy UL subframe
D L
s u b - f r…...
16m DLsub-frame
16m ULsub-frame
…...
16m DLsub-frame Downlink
Channel
UplinkChannel
16m ULsub-frame
16m DLsub-frame
16m DLsub-frame
16m ULsub-frame
16m ULsub-frame
…...
Superframe n+1
Proposed Text for Half-duplex MS Operation
• Details are referred to C802.16m-08/031r1
1 6 m R a d i o F r a m e
16m SuperFrame n
16m Radio Frame …...
Superframe n-1
Legacy 5ms frame Legacy 5ms Frame …...
16m sync signal
16e preamble
…...
16m sync signal
16e preamble
16e preamble
Legacy MS’s view
16m MS’s view
16m BS’s view
DownlinkChannel
UplinkChannel
…...
…...
DownlinkChannel
UplinkChannel
…...
…...
DownlinkChannel
UplinkChannel
…...
Superframe n+1
16m DL (UG A)
Legacy DL subframe
16m DL(User
Group B)
Legacy DL
sub-fr
Legacy UL
sub-fr
16m UL(User Group A)
16m UL(UG B)
16m DL(UG A)
Legacy DL subframe
Legacy DL
sub-fr
Legacy UL
sub-fr
16m DL (UG A)
Legacy DL subframe
16m DL(User
Group B)
Legacy DL
sub-fr
Legacy UL
sub-fr
16m UL(User Group A)
16m UL(UG B)
16m DL(UG A)
Legacy DL subframe
Legacy DL
sub-fr
Legacy UL
sub-fr
16m DL (UG A)
16m DL(User
Group B)
16m UL(User Group A)
16m UL(UG B)
16m DL(UG A)
16m DL (UG A)
16m DL(User
Group B)
16m UL(User Group A)
16m UL(UG B)
16m DL(UG A)