Rate matching for piggyback downlink control information

Various aspects of the present disclosure generally relate to wireless communication. In some aspects, a user equipment may determine a number of resource elements (REs) associated with downlink control information (DCI) that is to be carried on a physical downlink shared channel (PDSCH) with a shared channel, wherein the number of REs associated with the DCI is determined based at least in part on a scaling factor and a number of REs associated with the shared channel; determine a transport block size (TBS) for the shared channel based at least in part on a remaining number of REs, of the number of REs associated with the shared channel, wherein the remaining number of REs is based at least in part on the number of REs associated with the DCI; and receive the PDSCH based at least in part on the TBS for the shared channel. Numerous other aspects are provided.

FIELD OF THE DISCLOSURE

Aspects of the present disclosure generally relate to wireless communication and to techniques and apparatuses for rate matching for piggyback downlink control information (DCI).

BACKGROUND

SUMMARY

In some aspects, a method of wireless communication, performed by a user equipment, may include determining a number of resource elements (REs) associated with downlink control information (DCI) that is to be carried on a physical downlink shared channel (PDSCH) with a shared channel, wherein the number of REs associated with the DCI is determined based at least in part on a scaling factor and a number of REs associated with the shared channel; determining a transport block size (TBS) for the shared channel based at least in part on a remaining number of REs, of the number of REs associated with the shared channel, wherein the remaining number of REs is based at least in part on the number of REs associated with the DCI; and receiving the PDSCH based at least in part on the TBS for the shared channel.

In some aspects, a method of wireless communication, performed by a base station, may include determining a number of REs associated with DCI that is to be carried on a PDSCH with a SCH, wherein the number of REs associated with the DCI is determined based at least in part on a scaling factor and a number of REs associated with the shared channel; determining a TBS for the shared channel based at least in part on a remaining number of REs, of the number of REs associated with the shared channel, wherein the remaining number of REs is based at least in part on the number of REs associated with the DCI; and transmitting the PDSCH based at least in part on the TBS for the shared channel.

In some aspects, a user equipment for wireless communication may include a memory and one or more processors operatively coupled to the memory. The memory and the one or more processors may be configured to determine a number of REs associated with DCI that is to be carried on a PDSCH with a shared channel, wherein the number of REs associated with the DCI is determined based at least in part on a scaling factor and a number of REs associated with the shared channel; determine a TBS for the shared channel based at least in part on a remaining number of REs, of the number of REs associated with the shared channel, wherein the remaining number of REs is based at least in part on the number of REs associated with the DCI; and receive the PDSCH based at least in part on the TBS for the shared channel.

In some aspects, a base station for wireless communication may include a memory and one or more processors operatively coupled to the memory. The memory and the one or more processors may be configured to determine a number of REs associated with DCI that is to be carried on a PDSCH with a SCH, wherein the number of REs associated with the DCI is determined based at least in part on a scaling factor and a number of REs associated with the shared channel; determine a TBS for the shared channel based at least in part on a remaining number of REs, of the number of REs associated with the shared channel, wherein the remaining number of REs is based at least in part on the number of REs associated with the DCI; and transmit the PDSCH based at least in part on the TBS for the shared channel.

In some aspects, a non-transitory computer-readable medium may store one or more instructions for wireless communication. The one or more instructions, when executed by one or more processors of a UE, may cause the one or more processors to determine a number of REs associated with DCI that is to be carried on a PDSCH with a shared channel, wherein the number of REs associated with the DCI is determined based at least in part on a scaling factor and a number of REs associated with the shared channel; determine a TBS for the shared channel based at least in part on a remaining number of REs, of the number of REs associated with the shared channel, wherein the remaining number of REs is based at least in part on the number of REs associated with the DCI; and receive the PDSCH based at least in part on the TBS for the shared channel.

In some aspects, a non-transitory computer-readable medium may store one or more instructions for wireless communication. The one or more instructions, when executed by one or more processors of a base station, may cause the one or more processors to determine a number of REs associated with DCI that is to be carried on a PDSCH with a SCH, wherein the number of REs associated with the DCI is determined based at least in part on a scaling factor and a number of REs associated with the shared channel; determine a TBS for the shared channel based at least in part on a remaining number of REs, of the number of REs associated with the shared channel, wherein the remaining number of REs is based at least in part on the number of REs associated with the DCI; and transmit the PDSCH based at least in part on the TBS for the shared channel.

In some aspects, an apparatus for wireless communication may include means for determining a number of REs associated with DCI that is to be carried on a PDSCH with a shared channel, wherein the number of REs associated with the DCI is determined based at least in part on a scaling factor and a number of REs associated with the shared channel; means for determining a TBS for the shared channel based at least in part on a remaining number of REs, of the number of REs associated with the shared channel, wherein the remaining number of REs is based at least in part on the number of REs associated with the DCI; and means for receiving the PDSCH based at least in part on the TBS for the shared channel.

In some aspects, an apparatus for wireless communication may include means for determining a number of REs associated with DCI that is to be carried on a PDSCH with a SCH, wherein the number of REs associated with the DCI is determined based at least in part on a scaling factor and a number of REs associated with the shared channel; means for determining a TBS for the shared channel based at least in part on a remaining number of REs, of the number of REs associated with the shared channel, wherein the remaining number of REs is based at least in part on the number of REs associated with the DCI; and means for transmitting the PDSCH based at least in part on the TBS for the shared channel.

DETAILED DESCRIPTION

In some aspects, UE120may include means for determining a number of resource elements (REs) associated with downlink control information (DCI) that is to be carried on a physical downlink shared channel (PDSCH) with a shared channel, wherein the number of REs associated with the DCI is determined based at least in part on a scaling factor and a number of REs associated with the shared channel; means for determining a transport block size (TBS) for the shared channel based at least in part on a remaining number of REs, of the number of REs associated with the shared channel, wherein the remaining number of REs is based at least in part on the number of REs associated with the DCI; means for receiving the PDSCH based at least in part on the TBS for the shared channel; means for receiving information identifying the scaling factor; means for determining an initial TBS based at least in part on the number of REs associated with the shared channel, wherein the number of REs associated with the DCI is based at least in part on the initial TBS; means for determining the number of REs associated with the DCI based at least in part on combining the scaling factor, a payload size of the DCI, and a payload size of the shared channel; means for determining an initial TBS based at least in part on the number of REs associated with the shared channel and an MCS of the shared channel; means for determining the remaining number of REs by subtracting the number of REs associated with the DCI from the number of REs associated with the shared channel; means for determining a size for a code block based at least in part on the initial TBS; means for receiving DCI scheduling the shared channel, wherein the number of REs associated with the shared channel is indicated by the DCI scheduling the shared channel; and/or the like. In some aspects, such means may include one or more components of UE120described in connection withFIG.2, such as controller/processor280, transmit processor264, TX MIMO processor266, MOD254, antenna252, DEMOD254, MIMO detector256, receive processor258, and/or the like.

In some aspects, base station110may include means for determining a number of REs associated with DCI that is to be carried on a PDSCH with an SCH, wherein the number of REs associated with the DCI is determined based at least in part on a scaling factor and a number of REs associated with the shared channel; means for determining a TBS for the shared channel based at least in part on a remaining number of REs, of the number of REs associated with the shared channel, wherein the remaining number of REs is based at least in part on the number of REs associated with the DCI; means for transmitting the PDSCH based at least in part on the TBS for the shared channel; means for transmitting information identifying the scaling factor; means for determining an initial TBS based at least in part on the number of REs associated with the shared channel, wherein the number of REs associated with the DCI is based at least in part on the initial TBS; means for determining the number of REs associated with the DCI based at least in part on combining the scaling factor, a payload size of the DCI, and a payload size of the shared channel; means for determining an initial TBS based at least in part on the number of REs associated with the shared channel and an MCS of the shared channel; means for determining the remaining number of REs by subtracting the number of REs associated with the DCI from the number of REs associated with the shared channel; means for determining a size for a code block based at least in part on the initial TBS; means for transmitting DCI scheduling the shared channel, wherein the number of REs associated with the shared channel is indicated by the DCI scheduling the shared channel; and/or the like. In some aspects, such means may include one or more components of base station110described in connection withFIG.2, such as antenna234, DEMOD232, MIMO detector236, receive processor238, controller/processor240, transmit processor220, TX MIMO processor230, MOD232, antenna234, and/or the like.

DCI is traditionally transmitted to a UE on a physical downlink control channel (PDCCH) in a control resource set (CORESET). This may involve blind decoding, because a UE is given all the information required to decode a PDCCH (e.g., the resource allocation of PDCCH, the aggregation level, and so on), and may use this information to decode according to multiple blind decoding hypotheses until a PDCCH for the UE is discovered. In some cases, DCI, or some part of a DCI, can be transmitted on a PDSCH. This is referred to as a piggyback or piggybacked DCI. The information used to decode the piggyback DCI, such as a resource allocation for the piggyback DCI, may be known to the UE based at least in part on another DCI, which may be provided prior to the piggyback DCI. Thus, blind decoding is not required for the piggyback DCI, a higher MCS level can be used for the piggyback DCI, and a larger payload and/or more DCIs can be sent in a given set of resources.

Piggyback DCI may be associated with a variable payload size, which can sometimes be large. While a piggyback DCI with a small payload may have a relatively small impact on the PDSCH that carries the piggyback DCI, a larger payload or multiple piggyback DCIs may increase the code rate of the PDSCH, leading to a higher block error rate (BLER). A higher BLER leads to increased communication resource usage associated with retransmission of piggyback DCI and/or PDSCHs. Furthermore, the BLER impact of the piggyback DCI may be greater than a BLER impact of other piggyback control information, such as piggyback uplink control information (UCI), so a piggyback UCI's rate matching procedure may be unsuitable for piggyback DCI.

Some techniques and apparatuses described herein provide rate matching of a PDSCH that carries one or more piggyback DCI based at least in part on a parameter referred to herein as a scaling factor (e. g., βoffset). The scaling factor may indicate a portion of available PDSCH REs to be allocated for piggyback DCI. A UE or base station may determine a scaled number of REs of a PDSCH using the scaling factor, and may modify a TBS for the PDSCH in accordance with the scaled number of REs. Thus, the UE or the base station may take into account a scaling factor to determine a TBS for a PDSCH, thereby reducing the BLER associated with piggyback DCI, particularly piggyback DCI with large payloads or groups of multiple piggyback DCI on a PDSCH. Thus, communication resource usage of the UE and the base station is reduced relative to transmitting PDSCHs at a higher potential BLER.

FIG.3is a diagram illustrating an example300of piggyback DCI, in accordance with the present disclosure. A first part of DCI (e.g., a first DCI message), shown by reference number310, is provided on a PDCCH. For example, the UE may intermittently monitor the PDCCH (e.g., on a subset of PDCCHs, such as every N PDCCHs where N is an integer). The first part of the DCI may include information for decoding a PDSCH that is to carry one or more piggyback DCI, as indicated by the arrow from the first part of the DCI to the PDSCH. For example, in Type 1, the first part of the DCI may include scheduling information or a grant for a PDSCH and scheduling information for the second part of the DCI in the PDSCH (as indicated by the arrow from the first part of the DCI to the second part of the DCI shown by reference number330). The second part of the DCI, shown by reference number340, may include scheduling information for one or more subsequent PDSCHs. For example, the one or more piggyback DCI may include respective DCI that carry information for decoding subsequent PDSCHs (e.g., scheduling information and/or the like), shown by reference numbers350and360. Some techniques and apparatuses described herein include rate matching of the PDSCH associated with the second part of the DCI in accordance with a scaling factor, as described in more detail in connection withFIGS.4-6.

FIG.4is a diagram illustrating an example400of transmission of piggyback DCI in accordance with a scaling factor, in accordance with the present disclosure. As shown, example400includes a UE120and a BS110.

As shown by reference number410, the BS110may transmit, and the UE120may receive, a scaling factor for piggyback DCI. The scaling factor may be represented by βoffset. The scaling factor may be used to determine a modified TBS for a PDSCH that carries the piggyback DCI, as described in more detail below. In some aspects, the scaling factor may be transmitted using radio resource control (RRC) signaling or another form of semi-static signaling. In some aspects, the scaling factor may be provided in DCI, such as a first part of DCI (as described in connection withFIG.3) in a CORESET associated with the PDSCH.

As shown by reference number420, the BS110may transmit, and the UE120may receive, the first part of the DCI. In some aspects, the first part of the DCI may indicate the scaling factor. In other aspects, the first part of the DCI may be transmitted separately from the information indicating the scaling factor. As further shown, the first part of the DCI may indicate a piggyback DCI PDSCH allocation. For example, the first part of the DCI may schedule the PDSCH, and may indicate resources and/or parameters associated with the piggyback DCI (e.g., the second part of the DCI). The PDSCH may be associated with a downlink shared channel (DL-SCH), which may carry data to be transmitted on the PDSCH. Some techniques and apparatuses described herein indicate how to determine rate matching for REs of the PDSCH so that the DL-SCH can be transmitted with a lower BLER than if puncturing or another form of combined resource allocation is used for the piggyback DCI and the PDSCH.

Reference numbers430,440,450, and460show a procedure for determining a modified TBS for the DL-SCH based at least in part on the scaling factor. In other words, the procedure is for rate matching the PDSCH around the piggyback DCI.

As shown by reference number430, the UE120and/or the BS110may determine an initial TBS and code block size (CBS) as if all PDSCH REs are available for the DL-SCH. For example, the UE120may determine the initial TBS and CBS as if no piggyback DCI is to be transmitted on the PDSCH. The initial TBS may be a function of an MCS and a number of REs (NRE), where NREis indicated by the DCI that schedules the PDSCH. Generally, the UE120and/or the BS110may determine the initial TBS using a formula specified by a wireless communication specification.

As shown by reference number440, the UE120and/or the BS110may apply the scaling factor to determine a number of REs for the piggyback DCI (NRE,DCI). For example, the UE120or the BS110may determine the number of REs for the piggyback DCI based at least in part on combining the scaling factor, the number of REs of the PDSCH, and respective numbers of bits of the piggyback DCI and the DL-SCH. Generally, this determination may be represented as

NRE,DCI=KDCI·βoffsetKDL-SCH⁢NRE,
wherein KDL-SCHis a number of bits for the DL-SCH derived from the TBS, and KDCIis the DCI payload size.

In some aspects, the UE120and/or the BS110may determine NRE,DCIto occupy one or more entire resource blocks (RBs). For example, the UE120and/or the BS110may determine NRE,DCIas a multiple of an RB size (e.g., 12) so that DCI and DL-SCH REs do not share an RB. This may simplify transmission or reception of the piggyback DCI, thereby conserving communication resources.

As shown by reference number450, the UE120and/or the BS110may determine a remaining number of REs for the DL-SCH (NRE′). For example, the UE120and/or the BS110may determine the remaining number of REs based at least in part on the initial number of REs and the number of REs associated with the DCI, such as based at least in part on the equation NRE′=NRE−NRE,DCI.

As shown by reference number460, the UE120may determine a modified TBS based at least in part on the remaining number of REs. For example, the UE120may determine the modified TBS as a function of the MCS and the remaining number of REs. The modified TBS may be smaller than the initial TBS due to the scaling of the number of REs associated with the DCI and the deduction of the number of REs associated with the DCI from the number of REs associated with the DL-SCH to determine the remaining number of REs.

As shown by reference number470, the BS110may transmit, and the UE120may receive, the second part of the DCI on the PDSCH. For example, the PDSCH may use the modified TBS for the DL-SCH. The modified TBS may lead to improved performance of transmission of the PDSCH due to a decreased BLER, which reduces communication resource consumption of the BS110and the UE120.

FIG.5is a diagram illustrating an example process500performed, for example, by a UE, in accordance with the present disclosure. Example process500is an example where the UE (e.g., UE120and/or the like) performs operations associated with rate matching for piggyback DCI.

As shown inFIG.5, in some aspects, process500may include determining a number of REs associated with DCI that is to be carried on a PDSCH with a shared channel, wherein the number of REs associated with the DCI is determined based at least in part on a scaling factor and a number of REs associated with the shared channel (block510). For example, the UE (e.g., using antenna252, DEMOD254, MIMO detector256, receive processor258, controller/processor280, and/or the like) may determine a number of REs associated with DCI that is to be carried on a PDSCH with a shared channel, as described above. In some aspects, the number of REs associated with the DCI is determined based at least in part on a scaling factor and a number of REs associated with the shared channel.

As further shown inFIG.5, in some aspects, process500may include determining a TBS for the shared channel based at least in part on a remaining number of REs, of the number of REs associated with the shared channel, wherein the remaining number of REs is based at least in part on the number of REs associated with the DCI (block520). For example, the UE (e.g., using antenna252, DEMOD254, MIMO detector256, receive processor258, controller/processor280, and/or the like) may determine a TBS for the shared channel based at least in part on a remaining number of REs, of the number of REs associated with the shared channel, as described above. In some aspects, the remaining number of REs is based at least in part on the number of REs associated with the DCI. This TBS may be referred to herein as a modified TBS.

As further shown inFIG.5, in some aspects, process500may include receiving the PDSCH based at least in part on the TBS for the shared channel (block530). For example, the UE (e.g., using antenna252, DEMOD254, MIMO detector256, receive processor258, controller/processor280, and/or the like) may receive the PDSCH based at least in part on the TBS for the shared channel, as described above.

In a first aspect, process500includes receiving information identifying the scaling factor.

In a second aspect, alone or in combination with the first aspect, the information identifying the scaling factor is received via RRC signaling.

In a third aspect, alone or in combination with one or more of the first and second aspects, the information identifying the scaling factor is received via DCI that schedules the shared channel.

In a fourth aspect, alone or in combination with one or more of the first through third aspects, the TBS is a modified TBS, and the method further comprises: determining an initial TBS based at least in part on the number of REs associated with the shared channel, where the number of REs associated with the DCI is based at least in part on the initial TBS.

In a fifth aspect, alone or in combination with one or more of the first through fourth aspects, the initial TBS is determined based at least in part on an assumption that all allocated REs of the PDSCH are available for the shared channel.

In a sixth aspect, alone or in combination with one or more of the first through fifth aspects, determining the number of REs associated with the DCI further comprises determining the number of REs associated with the DCI based at least in part on combining the scaling factor, a payload size of the DCI, and a payload size of the shared channel.

In a seventh aspect, alone or in combination with one or more of the first through sixth aspects, the number of REs of the DCI is determined to be a multiple of 12.

In an eighth aspect, alone or in combination with one or more of the first through seventh aspects, the number of REs of the DCI is determined so that the DCI occupies an integer number of entire RBs of the PDSCH.

In a ninth aspect, alone or in combination with one or more of the first through eighth aspects, the TBS is a modified TBS, the method further comprises determining an initial TBS based at least in part on the number of REs associated with the shared channel and an MCS of the shared channel, determining the number of REs associated with the DCI comprises determining the number of REs associated with the DCI by combining the number of REs associated with the shared channel, a payload size of the shared channel, a payload size of the DCI, and the scaling factor, the method further comprises: determining the remaining number of REs by subtracting the number of REs associated with the DCI from the number of REs associated with the shared channel, and determining the modified TBS comprises determining the modified TBS based at least in part on the remaining number of REs and the MCS of the shared channel.

In a tenth aspect, alone or in combination with one or more of the first through ninth aspects, process500includes determining a size for a code block based at least in part on the initial TBS.

In an eleventh aspect, alone or in combination with one or more of the first through tenth aspects, process500includes receiving DCI scheduling the shared channel, wherein the number of REs associated with the shared channel is indicated by the DCI scheduling the shared channel.

FIG.6is a diagram illustrating an example process600performed, for example, by a base station, in accordance with the present disclosure. Example process600is an example where the base station (e.g., BS110and/or the like) performs operations associated with rate matching for piggyback DCI.

As shown inFIG.6, in some aspects, process600may include determining a number of REs associated with DCI that is to be carried on a PDSCH with a SCH, wherein the number of REs associated with the DCI is determined based at least in part on a scaling factor and a number of REs associated with the shared channel (block610). For example, the base station (e.g., using controller/processor240, transmit processor220, TX MIMO processor230, MOD232, antenna234, and/or the like) may determine a number of REs associated with DCI that is to be carried on a PDSCH with an SCH, as described above. In some aspects, the number of REs associated with the DCI is determined based at least in part on a scaling factor and a number of REs associated with the SCH.

As further shown inFIG.6, in some aspects, process600may include determining a TBS for the shared channel based at least in part on a remaining number of REs, of the number of REs associated with the shared channel, wherein the remaining number of REs is based at least in part on the number of REs associated with the DCI (block620). For example, the base station (e.g., using controller/processor240, transmit processor220, TX MIMO processor230, MOD232, antenna234, and/or the like) may determine a TBS for the shared channel based at least in part on a remaining number of REs, of the number of REs associated with the shared channel, as described above. In some aspects, the remaining number of REs is based at least in part on the number of REs associated with the DCI.

As further shown inFIG.6, in some aspects, process600may include transmitting the PDSCH based at least in part on the TBS for the shared channel (block630). For example, the base station (e.g., using controller/processor240, transmit processor220, TX MIMO processor230, MOD232, antenna234, and/or the like) may transmit the PDSCH based at least in part on the TBS for the shared channel, as described above.

In a first aspect, process600includes transmitting information identifying the scaling factor.

In a second aspect, alone or in combination with the first aspect, the information identifying the scaling factor is transmitted via radio resource control signaling.

In a third aspect, alone or in combination with one or more of the first and second aspects, the information identifying the scaling factor is transmitted via DCI that schedules the shared channel.

In a fourth aspect, alone or in combination with one or more of the first through third aspects, the TBS is a modified TBS, and the method further comprises determining an initial TBS based at least in part on the number of REs associated with the shared channel, where the number of REs associated with the DCI is based at least in part on the initial TBS.

In a fifth aspect, alone or in combination with one or more of the first through fourth aspects, the initial TBS is determined as if all allocated REs of the PDSCH are available for the shared channel.

In a sixth aspect, alone or in combination with one or more of the first through fifth aspects, determining the number of REs associated with the DCI further comprises determining the number of REs associated with the DCI based at least in part on combining the scaling factor, a payload size of the DCI, and a payload size of the shared channel.

In a seventh aspect, alone or in combination with one or more of the first through sixth aspects, the number of REs of the DCI is determined to be a multiple of 12.

In an eighth aspect, alone or in combination with one or more of the first through seventh aspects, the number of REs of the DCI is determined so that the DCI occupies an integer number of entire RB of the PDSCH.

In a ninth aspect, alone or in combination with one or more of the first through eighth aspects, the TBS is a modified TBS, and the method further comprises determining an initial TBS based at least in part on the number of REs associated with the shared channel and an MCS of the shared channel, determining the number of REs associated with the DCI comprises determining the number of REs associated with the DCI by combining the number of REs associated with the shared channel, a payload size of the shared channel, a payload size of the DCI, and the scaling factor, the method further comprises determining the remaining number of REs by subtracting the number of REs associated with the DCI from the number of REs associated with the shared channel, and determining the modified TBS comprises determining the modified TB S based at least in part on the remaining number of REs and the MCS of the shared channel.

In a tenth aspect, alone or in combination with one or more of the first through ninth aspects, process600includes determining a size for a code block based at least in part on the initial TBS.

In an eleventh aspect, alone or in combination with one or more of the first through tenth aspects, process600includes transmitting DCI scheduling the shared channel, wherein the number of REs associated with the shared channel is indicated by the DCI scheduling the shared channel.

Aspect 1: A method of wireless communication performed by a user equipment (UE), comprising: determining a number of resource elements (REs) associated with downlink control information (DCI) that is to be carried on a physical downlink shared channel (PDSCH) with a shared channel, wherein the number of REs associated with the DCI is determined based at least in part on a scaling factor and a number of REs associated with the shared channel; determining a transport block size (TBS) for the shared channel based at least in part on a remaining number of REs, of the number of REs associated with the shared channel, wherein the remaining number of REs is based at least in part on the number of REs associated with the DCI; and receiving the PDSCH based at least in part on the TBS for the shared channel.

Aspect 2: The method of Aspect 1, further comprising: receiving information identifying the scaling factor.

Aspect 3: The method of Aspect 2, wherein the information identifying the scaling factor is received via radio resource control (RRC) signaling.

Aspect 4: The method of Aspect 2, wherein the information identifying the scaling factor is received via DCI that schedules the shared channel.

Aspect 5: The method of any of Aspects 1-4, wherein the TBS is a modified TBS, and wherein the method further comprises: determining an initial TBS based at least in part on the number of REs associated with the shared channel, wherein the number of REs associated with the DCI is based at least in part on the initial TBS.

Aspect 6: The method of Aspect 5, wherein the initial TBS is determined based at least in part on an assumption that all allocated REs of the PDSCH are available for the shared channel.

Aspect 7: The method of any of Aspects 1-6, wherein determining the number of REs associated with the DCI further comprises: determining the number of REs associated with the DCI based at least in part on combining the scaling factor, a payload size of the DCI, and a payload size of the shared channel.

Aspect 8: The method of any of Aspects 1-7, wherein the number of REs of the DCI is determined to be a multiple of 12.

Aspect 9: The method of any of Aspects 1-8, wherein the number of REs of the DCI is determined so that the DCI occupies an integer number of entire RBs of the PDSCH.

Aspect 10: The method of any of Aspects 1-9, wherein the TBS is a modified TBS, and wherein the method further comprises: determining an initial TBS based at least in part on the number of REs associated with the shared channel and a modulation and coding scheme (MCS) of the shared channel, wherein determining the number of REs associated with the DCI comprises determining the number of REs associated with the DCI by combining the number of REs associated with the shared channel, a payload size of the shared channel, a payload size of the DCI, and the scaling factor, wherein the method further comprises: determining the remaining number of REs by subtracting the number of REs associated with the DCI from the number of REs associated with the shared channel, and wherein determining the modified TBS comprises determining the modified TBS based at least in part on the remaining number of REs and the MCS of the shared channel.

Aspect 11: The method of Aspect 10, further comprising: determining a size for a code block based at least in part on the initial TBS.

Aspect 12: The method of any of Aspects 1-11, further comprising: receiving DCI scheduling the shared channel, wherein the number of REs associated with the shared channel is indicated by the DCI scheduling the shared channel.

Aspect 13: A method of wireless communication performed by a base station, comprising: determining a number of resource elements (REs) associated with downlink control information (DCI) that is to be carried on a physical downlink shared channel (PDSCH) with a shared channel (SCH), wherein the number of REs associated with the DCI is determined based at least in part on a scaling factor and a number of REs associated with the shared channel; determining a transport block size (TBS) for the shared channel based at least in part on a remaining number of REs, of the number of REs associated with the shared channel, wherein the remaining number of REs is based at least in part on the number of REs associated with the DCI; and transmitting the PDSCH based at least in part on the TBS for the shared channel.

Aspect 14: The method of Aspect 13, further comprising: transmitting information identifying the scaling factor.

Aspect 15: The method of Aspect 14, wherein the information identifying the scaling factor is transmitted via radio resource control signaling.

Aspect 16: The method of Aspect 14, wherein the information identifying the scaling factor is transmitted via DCI that schedules the shared channel.

Aspect 17: The method of any of Aspects 13-16, wherein the TBS is a modified TBS, and wherein the method further comprises: determining an initial TBS based at least in part on the number of REs associated with the shared channel, wherein the number of REs associated with the DCI is based at least in part on the initial TBS.

Aspect 18: The method of Aspect 17, wherein the initial TBS is determined as if all allocated REs of the PDSCH are available for the shared channel.

Aspect 19: The method of any of Aspects 13-18, wherein determining the number of REs associated with the DCI further comprises: determining the number of REs associated with the DCI based at least in part on combining the scaling factor, a payload size of the DCI, and a payload size of the shared channel.

Aspect 20: The method of any of Aspects 13-19, wherein the number of REs of the DCI is determined to be a multiple of 12.

Aspect 21: The method of any of Aspects 13-20, wherein the number of REs of the DCI is determined so that the DCI occupies an integer number of entire RB of the PDSCH.

Aspect 22: The method of any of Aspects 13-21, wherein the TBS is a modified TBS, and wherein the method further comprises: determining an initial TBS based at least in part on the number of REs associated with the shared channel and a modulation and coding scheme (MCS) of the shared channel, wherein determining the number of REs associated with the DCI comprises determining the number of REs associated with the DCI by combining the number of REs associated with the shared channel, a payload size of the shared channel, a payload size of the DCI, and the scaling factor, wherein the method further comprises: determining the remaining number of REs by subtracting the number of REs associated with the DCI from the number of REs associated with the shared channel, and wherein determining the modified TBS comprises determining the modified TBS based at least in part on the remaining number of REs and the MCS of the shared channel.

Aspect 23: The method of Aspect 22, further comprising: determining a size for a code block based at least in part on the initial TBS.

Aspect 24: The method of any of Aspects 13-23, further comprising: transmitting DCI scheduling the shared channel, wherein the number of REs associated with the shared channel is indicated by the DCI scheduling the shared channel.

Aspect 27: An apparatus for wireless communication, comprising at least one means for performing the method of one or more Aspects of Aspects 1-24.