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Views on IEEE 802.16m Frame Structure Document Number: C80216m-07_354 Date Submitted: November 12, 2007 Source: Sassan Ahmadi

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Presentation on theme: "Views on IEEE 802.16m Frame Structure Document Number: C80216m-07_354 Date Submitted: November 12, 2007 Source: Sassan Ahmadi"— Presentation transcript:

1 Views on IEEE 802.16m Frame Structure Document Number: C80216m-07_354 Date Submitted: November 12, 2007 Source: Sassan Ahmadi (sassan.ahmadi@intel.com) Intel Corporationsassan.ahmadi@intel.com Venue: Atlanta, GA Base Contribution: C80216-07_354 Purpose: For discussion and approval by IEEE 802.16 Working Group 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: and.http://standards.ieee.org/guides/bylaws/sect6-7.html#6http://standards.ieee.org/guides/opman/sect6.html#6.3 Further information is located at and.http://standards.ieee.org/board/pat/pat-material.htmlhttp://standards.ieee.org/board/pat

2 2 802.16m OFDMA Numerology Transmission Bandwidth (MHz)1.251.651020 Sampling Frequency (MHz) 1.41.925.611.222.4 FFT Size128 51210242048 Sub-Carrier Spacing (kHz)10.941510.94 Tu (us)91.466.6791.4 Cyclic Prefix (CP)Ts (us) Number of OFDM Symbols per Frame Idle Time (us) Tg=1/4 Tu91.4 + 22.85=114.254387.25 Tg=1/8 Tu91.4 + 11.42=102.824864.64 Tg=1/16 Tu91.4 + 5.71=97.115147.39 Tg=1/32 Tu91.4 + 2.86=94.26534.22 Frame Size – (Number of OFDM Symbols) * Ts The idle time in FDD mode may be used for channel or noise measurements TD-SCDMA Coexistence ( Details are FFS)

3 3 802.16e Frame Structure Preamble

4 4 802.16m Super-Frame Concept FDD and TDD Modes Super-Frame OFDM Symbols (Symbols are numbered S#0 to S#5) Sub-Frame (Sub-frames are numbered SF#0 to SF#7) Frame (Frames are numbered F#0 to F#3) System Configuration Information, Paging, other Broadcast Information

5 5 Concept of Time Zones (TDD) SF #0 DL SF #1 DL SF #2 DL SF #3 DL SF #4 DL SF #5 UL SF #6 UL SF #7 UL SF #0 DL SF #1 DL SF #2 DL SF #3 DL SF #4 DL SF #5 UL SF #6 UL SF #7 UL SF #0 DL SF #1 DL SF #2 DL SF #3 DL SF #4 DL SF #5 UL SF #6 UL SF #7 UL 5 ms Radio Frame Legacy DL Zone New DL Zone Legacy UL Zone New UL Zone 1.In a mixed deployment, the allocation of time zones in the TDD duplex mode shall be as shown above. The duration of the zones may vary. Every frame shall start with a preamble and the MAP followed by legacy DL zone since legacy terminals/relays expect 802.16e zones here. The UL portion shall start with legacy UL zone since legacy BS/terminals/relays expect 802.16e control information be sent here. In a green-field deployment, the legacy zones can be removed. 2.Switching points should be synchronized across network to reduce inter-cell interference. 3.The switching points would require use of idle symbols to accommodate the gaps. In case of TDD operation with the generic frame structure, the last symbol in the slot immediately preceding a downlink-to- uplink/uplink-to-downlink switching point may be reserved for guard time and consequently not transmitted. Switching Point The duration of the zones is hypothetical and may vary

6 6 Concept of Time Zones (FDD) SF #0 SF #1 SF #2 SF #3 SF #4 SF #5 SF #6 SF #7 SF #0 SF #1 SF #2 SF #3 SF #4 SF #5 SF #6 SF #7 SF #0 SF #1 SF #2 SF #3 SF #4 SF #5 SF #6 SF #7 SF #0 SF #1 SF #2 SF #3 SF #4 SF #5 SF #6 SF #7 SF #0 SF #1 SF #2 SF #3 SF #4 SF #5 SF #6 SF #7 SF #0 SF #1 SF #2 SF #3 SF #4 SF #5 SF #6 SF #7 5 ms Radio Frame Legacy DL Zone New DL Zone Idle Time Legacy UL Zone New UL Zone Idle Time In a mixed deployment, the legacy DL/UL zones refer to 802.16REV FDD zones that use 802.16e physical resource structure and permutations. In a green-field deployment, the legacy zones may be removed. DL UL The duration of the zones is hypothetical and may vary

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