`081004
`Sorrento, Italy
`February 11 ~ 15, 2008
`________________________________________________________________________________
`Agenda item: 6.1.4
`Source: LG Electronics
`Title: Multiplexing of ACK/NACK in PUSCH
`Document for: Discussion & Decision
`________________________________________________________________________________
`1. Introduction
`In Athens (#50) it was decided that when control information is to be multiplexed with data, data information is
`rate matched with control, and that the ACK/NACK information is to be inserted into PUSCH by either puncturing data
`or control information bits. Also it was decided that all control information should be positioned next to the reference
`signal, and positioned in both slots of the subframe. In this contribution we propose puncturing positions for the uplink
`ACK/NACK information when transmitted in PUSCH.
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`2. Puncturing positions for ACK/NACK information
`Currently the actual insertion position of the ACK/NACK information in the PUSCH is not yet agreed. When we
`decided on the ACK/NACK information position in the PUSCH, we believe we also need to consider punctured out
`effects of the data information. Here we have proposed ACK/NACK puncturing position for data and control
`multiplexing structure A and B presented in document R1-080267 [2].
`Data information multiplexed with control information may have several code blocks according to transport block
`payload size. Depending on how and how much the control information is multiplexed each code blocks in the data
`information will be placed in different resource elements. Figure 1 shows an example of where each code block is
`positioned in structure A. Due the control information multiplexing and time-first mapping rule, the number of virtual
`subcarriers used for each code block can be different. Basically the lowest code blocks may be mapped to more virtual
`subcarriers because control information has already taken place.
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`Huawei Device Co., Ltd. v. Optis Cellular Technology, LLC
`OPTIS CELLULAR TECHNOLOGY, LLC EX2005 – 1
`R1-081004
`IPR2018-00807
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`Code Block 1
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`Code Block 2
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`Virtual sub-carrier
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`Reference Signal
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`Reference Signal
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`SC-FDMA Symbol
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`Data
`Control
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`Figure 1. An example of data code block mapping into the PUSCH subframe
`If we assume that the ACK/NACK information is punctured to certain positions so that it is continuing where the
`control signal left off (like in the example in figure 2a) then this will lead to unequal puncturing of data information in
`each code block. So we propose to spread the ACK/NACK information across the virtual subcarrier evenly when
`puncturing ACK/NACK information into the data information resources. The proposed scheme is shown in figure 2 (b).
`We can intuitively see that evenly spread ACK/NACK information will alleviate un-equal puncturing of code blocks.
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`Code Block 1
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`Code Block 2
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`Code Block 1
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`Code Block 2
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`Virtual sub-carrier
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`Virtual sub-carrier
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`Reference Signal
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`Reference Signal
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`Reference Signal
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`SC-FDMA Symbol
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`Reference Signal
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`SC-FDMA Symbol
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`Data
`
`Control
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`ACK/NACK
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`Data
`
`Control
`
`ACK/NACK
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`
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`(b) Proposed ACK/NACK positioning
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`(a) Alternative ACK/NACK positioning
`Figure 2. An example relationship between ACK/NACK puncturing position and data code block mappings in
`PUSCH
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`
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`The same can be said for the proposed control information multiplexing structure which is structure B. If we
`positioned the ACK/NACK signals to be consecutive in virtual subcarrier domain then we risk of puncturing only one
`or few of the code blocks out of many. Figure 3 shows the Proposed ACK/NACK positioning and the Alternative
`ACK/NACK positioning method for the proposed control information multiplexing structure B.
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`2/4
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`Huawei Device Co., Ltd. v. Optis Cellular Technology, LLC
`OPTIS CELLULAR TECHNOLOGY, LLC EX2005 – 2
`R1-081004
`IPR2018-00807
`
`
`
`Code Block 1
`
`Code Block 2
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`Code Block 1
`
`Code Block 2
`
`Virtual sub-carrier
`
`Virtual sub-carrier
`
`Reference Signal
`
`Reference Signal
`
`Reference Signal
`
`SC-FDMA Symbol
`
`Reference Signal
`
`SC-FDMA Symbol
`
`Data
`
`Control
`
`ACK/NACK
`
`Data
`
`Control
`
`ACK/NACK
`
`
`
`(b) Proposed ACK/NACK positioning
`
`(a) Alternative ACK/NACK positioning
`Figure 3. An example relationship between ACK/NACK puncturing position and data code block mappings in
`PUSCH
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`3. Conclusion
`So in summary we propose the following, in order to achieve even puncturing of information bits from code
`blocks;
`
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`l Positioning ACK/NACK information near the RS
`n Spreading the ACK/NACK puncturing positions to be evenly spread over virtual subcarriers
`(prior to DFT input).
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`Huawei Device Co., Ltd. v. Optis Cellular Technology, LLC
`OPTIS CELLULAR TECHNOLOGY, LLC EX2005 – 3
`R1-081004
`IPR2018-00807
`
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`Reference
`[1] R1-071839, “LS on target quality requirements on L1/L2 control channel”, RAN WG1, 3GPP TSG RAN WG1
`Meeting #48bis, St.Julians, Malta, March, 2007.
`[2] R1-080267, “PUSCH multiplexing of data, control, and ACK/NACK information”, LG Electronics, Inc., 3GPP TSG
`RAN WG1 Meeting #49bis, Sevilla, Spain, January, 2008.
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`4/4
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`Huawei Device Co., Ltd. v. Optis Cellular Technology, LLC
`OPTIS CELLULAR TECHNOLOGY, LLC EX2005 – 4
`R1-081004
`IPR2018-00807
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