Frame structur)e for IEEE 802~ 16m
`
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`2007/07/11
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`1/1
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`Ex. 2007 - IPR2021-00734
`ZyXEL Communications Corp. v. UNM Rainforest Innovations
`
`
`
`~mrm, §ti~rmt r:r~~' ~J:ltf=t,G\
`- ~ ff~ljj~pJT
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`2007/07/11
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`1/1
`
`Ex. 2007 - IPR2021-00734
`ZyXEL Communications Corp. v. UNM Rainforest Innovations
`
`
`
`Introduction
`
`I~~:~-> ·~Ji.....:_;_~
`
`• New standard 802.16m is being developed for next generation wireless
`communication
`o Enhanced spectrum efficiency
`o Higher speed
`• Backward compatibility
`o 802.16m shall be backward compatible with legacy system 802.16e
`o Systems based on IEEE 802.16m and 802.16e systems shall be able to
`operate on the same RF carrier, with the same channel bandwidth; and
`should be able to operate on the same RF carrier with different channel
`bandwidths.
`It is necessary to devise the frame structure of 802.16m frame
`supporting backward compatibility
`
`•
`
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`Ex. 2007 - IPR2021-00734
`ZyXEL Communications Corp. v. UNM Rainforest Innovations
`
`
`
`Proposed structure A
`
`:lit Frequency planning
`o Occupy the same band class as 802.16e
`o A 802.16m channel uses multiple (L)
`contiguous 802.16e channels
`o L BS's share the same 802.16m zone with
`L *8 bandwidth ( 802.16e BW with B)
`:it Backward compatibility
`o 16e preamble/FCH/MAP are kept unchanged
`o Only new DL (UL) 16m zones are appended
`(resource allocation is done by BS
`cooperation)
`lit BS cooperation
`o 16e BS's transmit 16e data using subcarreirs
`with BW 8 of their own, while share
`subcarriers with BW B*L in 16m zone.
`
`Lll ~~~--------
`
`I Example of L=3 I
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`
`Ex. 2007 - IPR2021-00734
`ZyXEL Communications Corp. v. UNM Rainforest Innovations
`
`
`
`Proposed structure A
`,, ','':,:,' ,,--,,--~ '-"''
`
`"
`
`lit Cell search by 16m user
`o Baseband BW of L *8
`o Detect 16e preamble with BW of 8
`o Decode FCH/MAP to decide the
`location of 16m zone
`o Retrieve 16m zone with BS with
`BW of L*B
`
`'
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`16m user
`
`16e preamble cell search
`BF=B
`
`Preamble index
`
`16e MAP indication of
`16m zone BF= B
`
`16m zone
`location
`
`Decode 16m zone BF=B*L
`
`BF be the bandwidth of
`LPF
`
`'f/q
`
`Ex. 2007 - IPR2021-00734
`ZyXEL Communications Corp. v. UNM Rainforest Innovations
`
`
`
`Proposed structure A
`
`• 16e preamble cell search by 16m user
`o RF synthesizer sweeps bands with band size of L *B
`o For each band, decide target preamble in each of 16e subband
`... Partition the band into several 16e subbands
`... Transform each of the subband signal to baseband using freq. offset
`manipulation
`... Filter the low-pass signal with BW B
`... Detect the preamble signal in BW B
`... Select the preamble with maximal detected power as desired preamble
`
`lnpu
`Baseb
`BW=
`
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`LPF
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`
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`
`Pn
`
`...
`
`Select
`Maximal Pn
`
`Sync. with
`subband n
`
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`
`n=n+1
`
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`
`s_(q
`
`Ex. 2007 - IPR2021-00734
`ZyXEL Communications Corp. v. UNM Rainforest Innovations
`
`
`
`Frame structure B
`
`• Frequency planning
`o Use the same band class as 16e
`ill Backward compatibility
`o 16e preamble/FCH/MAP are kept unchanged
`o Adjust the duty cycle so that 16e subframes are shorten in a frame with the
`other unused portion left for 16m service
`o 16m data can be informed by 16e MAP. In case 16e signal can not provide
`information of 16m service, 16m preamble is optionally given to 16m user
`for cell search
`• BS cooperation
`o 16e/16m BS's share the same BW with TDMA-Iike approach
`o 16e zone can vanish if 16m preamble is given
`:1!1 16m service detection
`o Detection of 16e preamble/FCH/MAP, or
`o Detection of 16m preamble/FCH/MAP
`
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`
`Ex. 2007 - IPR2021-00734
`ZyXEL Communications Corp. v. UNM Rainforest Innovations
`
`
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`
`Ex. 2007 - IPR2021-00734
`ZyXEL Communications Corp. v. UNM Rainforest Innovations
`
`
`
`Summary
`
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`
`- ---- ----- -- -
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`
`• Structure A
`o An OFDMA system with multiple zones
`o A specific resource (8W) sharing scheme
`• Multiple BS share channel with BW B*L
`• Independent allocation zone vs. cooperative allocation zone
`o A specific cell search scheme
`• Partition the band into several 16e subbands
`• Transform each of the subband signal to baseband using freq. offset
`manipulation
`.... Filter the low-pass signal with BW 8
`• Detect the preamble signal in BW 8
`
`,.m· ... ===ogy
`
`··,~~CHI.,.
`
`------------------------------------------------·-------------------------------------------·
`
`~11
`
`Ex. 2007 - IPR2021-00734
`ZyXEL Communications Corp. v. UNM Rainforest Innovations
`
`
`
`.
`
`.
`
`..
`
`Summary
`-=-----~·-'''~:_-:~-----
`
`• Structure B
`o An OFDMA system with multiple DL (UL) subframes from multiple
`standards
`o Multiple DL (UL) subframes are transmitted by different BS's
`o Adjust duty cycles for legacy and new systems in non-overlapping time
`subframe to optimize the bandwidth utilization and performance
`o When only 16m and 16e are present in the frame, at least one of 16e
`preamble and 16m midamble is given in each frame
`
`... · ID'duril;.nud!Dol
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`•· •
`
`·~
`
`-
`
`111
`
`Ex. 2007 - IPR2021-00734
`ZyXEL Communications Corp. v. UNM Rainforest Innovations
`
`
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