Sib PDSCH beam clustering for initial access information

A base station may determine one or more parameters of a PDSCH group including multiple PDSCHs for each beam in a plurality of beams, configure a plurality of resources for communication via the PDSCH group based on the determined one or more parameters of the PDSCH group, and transmit, to a UE, an indication of at least one parameter of the one or more parameters of the PDSCH group via the plurality of resources. The base station may also transmit, via the plurality of resources, one or more PDSCHs based on the at least one parameter of the one or more parameters of the PDSCH group. The UE may receive the indication of at least one parameter of the PDSCH group including multiple PDSCHs for each beam in a plurality of beams, and receive, from the base station, one or more PDSCHs based on the indication.

BACKGROUND

Technical Field

The present disclosure relates generally to communication systems, and more particularly, to a wireless communication including a system information block (SIB) physical downlink shared channel (PDSCH) group.

Introduction

SUMMARY

In an aspect of the disclosure, a method, a computer-readable medium, and an apparatus are provided. The apparatus may include a base station and a user equipment (UE). The base station may determine one or more parameters of a PDSCH group including multiple PDSCHs for each beam in a plurality of beams, the one or more parameters of the PDSCH group including at least one of a starting time of the PDSCH group, a time period between the multiple PDSCHs of different beams in the plurality of beams, a symbol length of PDSCHs of different beams in the plurality of beams, or a bandwidth of the PDSCH group, configure a plurality of resources for communication via the PDSCH group based on the determined one or more parameters of the PDSCH group, and transmit, to the UE, an indication of at least one parameter of the one or more parameters of the PDSCH group for communication via the plurality of resources. The base station may also transmit, to the UE via the plurality of resources, one or more PDSCHs based on the at least one parameter of the one or more parameters of the PDSCH group.

The UE may receive, from the base station, the indication of at least one parameter of the PDSCH group including multiple PDSCHs for each beam in a plurality of beams, and receive, from the base station via the plurality of resources, one or more PDSCHs based on the indication of the at least one parameter of the PDSCH group.

In one aspect, the PDSCH group may include a SIB PDSCH. In one aspect, the time period between the multiple PDSCHs of different beams may include beam switching gaps of the plurality of beams. In one aspect, at least one parameter of one or more parameters of the PDSCH group may be preconfigured or predefined.

The base station may further transmit, to the UE, a synchronization signal (SS) cluster for each beam in the plurality of beams, the SS cluster including at least one of a physical broadcast channel (PBCH) or a control resource set (CORESET). The UE may receive, from the base station, the SS cluster for each beam in the plurality of beams.

In one aspect, at least one of the PBCH or the CORESET may include at least one indication of at least one parameter of the one or more parameters of the PDSCH group. In another aspect, at least one indication of at least one parameter of the one or more parameters of the PDSCH group is configured for the plurality of beams. In another aspect, at least one indication of at least one parameter of the one or more parameters of the PDSCH group is configured for a subset of beams of the plurality of beams. In another aspect, at least one indication of at least one parameter of the one or more parameters of the PDSCH group is configured specifically for each beam of the plurality of beams.

In one aspect, at least one indication of at least one parameter of the one or more parameters of the PDSCH group may include an index to a set of one or more parameters. In another aspect, the starting time of the PDSCH group may include an absolute time domain value. In another aspect, the starting time of the PDSCH group may include a relative time domain value in reference to the SS cluster. In one aspect, the bandwidth of the PDSCH group may include an absolute frequency-domain value. In another aspect, the bandwidth of the PDSCH group may include a relative time domain value in reference to the SS cluster.

DETAILED DESCRIPTION

Referring again toFIG.1, in certain aspects, the UE104may include a PDSCH group processing component198configured to receive, from a base station, an indication of at least one parameter of a PDSCH group including multiple PDSCHs for each beam in a plurality of beams, the at least one parameter of the PDSCH group including at least one of a starting time of the PDSCH group, a time period between PDSCHs of different beams in the plurality of beams, a symbol length of PDSCHs of different beams in the plurality of beams, or a bandwidth of the PDSCH group, and receive, from the base station via a plurality of resources, one or more PDSCHs based on the indication of the at least one parameter of the PDSCH group. In certain aspects, the base station180may include a PDSCH group managing component199configured to determine one or more parameters of a PDSCH group including multiple PDSCHs for each beam in a plurality of beams, the one or more parameters of the PDSCH group including at least one of a starting time of the PDSCH group, a time period between the multiple PDSCHs of different beams in the plurality of beams, a symbol length of PDSCHs of different beams in the plurality of beams, or a bandwidth of the PDSCH group, configure a plurality of resources for communication via the PDSCH group based on the determined one or more parameters of the PDSCH group, and transmit, to a UE, an indication of at least one parameter of the one or more parameters of the PDSCH group for communication via the plurality of resources. Although the following description may be focused on 5G NR, the concepts described herein may be applicable to other similar areas, such as LTE, LTE-A, CDMA, GSM, and other wireless technologies.

At least one of the TX processor368, the RX processor356, and the controller/processor359may be configured to perform aspects in connection with198ofFIG.1. At least one of the TX processor316, the RX processor370, and the controller/processor375may be configured to perform aspects in connection with199ofFIG.1.

In some wireless communication systems, a base station may transmit an SSB that receiving UEs may use for an initial cell search. In some aspects, the UE may use the PSS/SSS/PBCH/DMRS signals in the SSB to refine the frequency offset estimation.FIG.4illustrates an example SSB400of a method of wireless communication. The SSB400may span 4 OFDM symbols with 1 symbol for a PSS, 2 symbols for a PBCH, and 1 symbol with an SSS and a PBCH frequency domain multiplexed with each other. By way of example, in some wireless communication systems, an SCS of 15 kHz or 30 kHz may be used for FR1 and SCS of 120 kHz or 240 kHz may be used for FR2. The PSS may use a length 127 frequency domain-based M-sequence (mapped to 127 subcarriers). For example, the PSS may have 3 possible sequences. The SSS may use a length 127 frequency domain-based Gold Code sequence (e.g., 2 M-sequences) (mapped to 127 subcarriers). By way of example, there may be a total of 1008 possible sequences for the SSS. The PBCH may be QPSK modulated, and the UE may coherently demodulate the PBCH using an associated DM-RS from the base station. During an initial search, a UE searcher may use a sliding window and correlation technique to look for the PSS. For each timing hypothesis associated with the sliding window, the UE may try all 3 possible PSS sequences and N frequency domain hypothesis to account for Doppler, internal clock frequency shifts, and any other frequency errors.

The base station may generate the PSS based on an M-sequence and transmit the PSS to the UE. In some aspects, the PSS may be represented as d(n)=1−2x(m). The PSS may be determined as one sequence out of three (3) possible sequences. The PSS sequence may have a sequence length of 127, and the PSS may have a one (1) symbol) length. The PSS sequence may be determined based on a cell ID part 2, NID(2), of the cell associated with the PSS. In some aspects, m may be determined as m=(n+43NID(2))mod 127, where 0≤n<127. The cell ID part 2 may have 1 value out of three (3) possible values. For example, the cell ID part 2 may be represented as NID(2)=0, 1, 2. Accordingly, the UE may use the PSS to estimate the timing/frequency synchronization. That is, the UE may use the PSS to perform at least one of a symbol timing estimation, an initial frequency offset estimation or a generation of a cell identity (ID) part 2 of the cell associated with the PSS.

The SSS may be generated based on two (2) M-sequences, m0and m1, i.e., the Gold code. The SSS may be represented as d(n)=[1−2x0((n+m0)mod 127)][1−2x1((n+m1)mod 127)]. The SSS may be determined as one sequence out of 336 possible sequences. The SSS sequence may have a sequence length of 127, and the PSS may have a one (1) symbol length. The SSS sequence may be determined based on a cell ID part 1, NID(1), and the cell ID part 2, NID(2), of the cell associated with the SSS. In some aspects, m0may be determined as

m0=3[NID(1)1⁢1⁢2]+NID(2),
and m1may be determined as m1=NID(1)mod 112+m0+1. The SSS may be determined as one sequence of 336 possible sequences. The cell ID part 1 may have 1 value out of 336 possible values. For example, the cell ID part 1 may be represented as NID(1)=0, 1, 2, . . . , 225. Accordingly, the UE may use the SSS after estimating the timing/frequency synchronization based on the PSS to generate the cell ID part 1 of the cell associated with the SSS.

Accordingly, the UE may generate the physical cell ID as represented as NIDcell=3NID(1)+NID(2)based on the cell ID part 1 determined based on the SSS and the cell ID part 2 determined based on the PSS.

The PBCH may carry the MIB and may be QPSK modulated. The UE may coherently demodulate the PBCH using an associated DM-RS from the base station. Referring toFIG.4, the PBCH may include 576 Res, i.e., 240×2+48+48.

The PBCH DM-RS may function as a reference signal for decoding the PBCH. The UE may use the PBCH DM-RS for channel estimation of the PBCH to demodulate the PBCH. For FR2, the PBCH DM-RS may carry the 3 least significant bits (LSBs) of the SSB index per half frame from the DMRS sequence index. The PBCH DM-RS REs may be interleaved with the PBCH data every 4thsubcarrier (SC). In one aspect, the DM-RS may include 144 Res, i.e., 60×2+12+12. In one aspect, the total number of bits of the PBCH may be 31 for FR2. In one aspect, the PBCH for FR2 may include the following fields.

In some aspects, the MIB carried in the PBCH may include an indication of at least one CORESET. At least one CORESET may include a CORESET0 configured to schedule the SIB1. In one aspect, the MIB may include a parameter pdcch-ConfigSIB1 including 4 bits of a controlResourceSetZero field indicating CORESET0 and 4 bits of a searchSpaceZero field indicating search space set 0. That is, the 4 bits of the controlResourceSetZero field may determine the multiplexing pattern and frequency offset, the number of RBs, or the number of symbols of the CORESET0. The 4 bits of the searchSpaceZero field may determine the CORESET0 time location, e.g., the value of 0 is used for multiplexing patterns 2 and 3.

The base station may send a grant for a system information block type 1 (SIB1) PDSCH in DCI format 1_0 with a cyclic redundancy check (CRC) scrambled by a system information radio network temporary identifier (RNTI) (SI-RNTI). Here, the SIB1 may refer to the SIB that may be carrying the cell access information. The base station may send the DCI using the PDCCH type0 on the search space set 0 on CORESET0. In some aspects, the total number of bits for the DCI format 1_0 may be 37, 39, or 41 bits. In one aspect, the DCI format 1_0 may include the following fields.

In some aspects, the SSB symbol and the CORESET0 symbol for FR2 may be multiplexed to have various multiplexing patterns. In one aspect, the SSB symbol and the CORESET0 symbol may be time-division multiplexed, i.e., multiplexing pattern 1. In another aspect, the SSB symbol and the CORESET0 symbol may use different SCSs, and may be frequency-division multiplexed and time-division multiplexed, i.e., using multiplexing pattern 2. In another aspect, the SSB symbol and the CORESET0 symbol may use the same SCS and may be frequency-division multiplexed, i.e., using multiplexing pattern 3. The MIB may carry the pdcch-ConfigSIB1 parameter, including the controlResourceSetZero field (4 bits) and the searchSpaceZero field (4 bits). The controlResourceSetZero field may indicate the multiplexing pattern and the CORESET0 frequency offset, the number of RBs, and the number of symbols, and the searchSpaceZero field may indicate the CORESET0 time location. In one aspect, the searchSpaceZero field may have a value 0 for multiplexing patterns 2 and 3. In some aspects, the CORESET0 may be 1, 2, or 3 symbols long and have 24, 48, or 96 RBs.

In some aspects, higher NR operating bands may have larger bandwidths, and the higher operating frequency bands may cause higher residual noise. To address the noise, more lenient SCSs may be provided for the higher operating band, and several designs of the waveform may be provided for the DL operation for higher NR operating bands having larger bandwidths. In one aspect, a single carrier frequency domain implementation, e.g., DFT-s-OFDM, may have a low peak-to-average power ratio (PAPR) that may provide better coverage, support a single tap frequency domain equalization (FDE), or an efficient BW utilization from not having a guard band. In another aspect, a single carrier time domain implementation, e.g., SC-QAM, may have a lower PAPR which may provide better coverage, or a low complexity implementation from not having an FFT/IFFT. In another aspect, an OFDM may have a higher PAPR that may cause distortion of a signal, a higher SNR, a higher spectral efficiency, a higher order MIMO to achieve relatively higher data rate, a single tap FDE, an efficient BW utilization from not having a guard band, and an easier FDM capability.

FIGS.5A and5Billustrate examples of beam switching.FIG.5Aincludes a first example500with a beam switching gap absorbed by a CP, andFIG.5Bincludes a second example550with a beam switching gap longer than the CP. In some aspects, the higher operation bands may have increased SCS, e.g., 960 kHz, 1920 kHz, or 3840 kHz, to reduce phase noise and to increase the overall channelization bandwidth with a manageable FFT size. In some aspects, increasing the SCS may proportionally decrease the symbol time and the CP. Table 3 may provide examples of the CP length (TCP) and the symbol time (Tsymb) associated with the SCS.

TABLE 3< Examples of TCPand Tsymbassociated with the SCS >u012345678SCS (kHz)15306012024048096019203840TCP(ns)4687.52343.81171.9585.9293.0146.573.236.618.3Tsymb(ns)66666.733333.316666.78333.34166.72083.31041.7520.8260.4

Beam switching gaps may be provided between consecutive SSB beams to facilitate the beam switching. That is, to switch between different SSB beams, a beam switching gap may be provided between the two different SSB beams. In some aspects, the CP length may be long enough to absorb the beam switching gap. Referring to the first example500, the beam switching gaps may be approximately 100 ns. The CP length may be long enough, e.g., greater than 100 ns, to absorb the SSB beam switching gap. Accordingly, the CP may absorb the SSB beam switching gap, and the beam may be switched from the beam n to the beam n+1 without a beam switching gap.

In some aspects, higher operation bands with higher SCS may have relatively shorter CP length and symbol time, and the CP length may not be long enough to absorb the beam switching gap. The second example550may be for higher bands, i.e., higher SCS, and may have relatively shorter symbol times and CP length. The CP length may not be long enough to absorb the beam switching gap within the CP. For example, for the SCS=3840 kHz, the CP length may be 18.3 ns, which is shorter than the beam switching gap, which may be approximately 100 ns. Accordingly, the beam switching gap may become considerably increased in length compared to the symbol length and also result in a larger signaling overhead and increased wasted resources. In some aspects, a gap may be provided to extend to the symbol level resolution. In one aspect, referring to the second example550, the first SSB symbol for the beam n+1 may be skipped to accommodate the beam switching gap that is larger than the CP length.

FIGS.6A and6Billustrate examples of SSB/CORESET patterns, including beam switching gaps.FIG.6Aillustrates the example600of SSB/CORESET pattern using a multiplexing pattern 1, andFIG.6Billustrates an example650of the SSB/CORESET pattern using a multiplexing pattern 2. In some aspects, the CORESET may include CORESET0. The higher operation bands with higher SCS may have relatively shorter CP length and symbol time, and a beam switching gap may be provided between different beams. In some aspects, using the multiplexing pattern 1, where the CORESET0 is time-division multiplexed with the SSB, the beam switching gaps may be provided between each SSB beam as well as each CORESET0 of different beams. That is, the beam switching gaps may be provided between the SSB beams and between CORESET0 of different beams, doubling the wasted resources in the time domain to provide the beam switching gaps, i.e.,600. In some aspects, using the multiplexing pattern 2, where the CORESET0 is frequency-division multiplexed and time-division multiplexed, the beam switching gaps may be provided between each SSB beams as well as each CORESET0 of different beams may still double the wasted resourced in the time domain to provide the beam switching gaps, i.e.,650. In some aspects, using the multiplexing pattern 3, where the CORESET0 is frequency-division multiplexed, the beam switching gaps may be provided between the SSB beams and between CORESET0 of different beams without doubling the wasted resources in the time domain. However, using the multiplexing pattern 3 may not be applicable in single carrier waveform cases, e.g., in a single carrier QAM (SC-QAM).

In some aspects, initial access structures carrying initial access information messages having various patterns of at least one of the SS, the PBCH, the CORESET, and/or the SIB may be provided to reduce the beam switching gap in the higher operation bands. Here, the initial access structure may refer to the channel/message that carries the information message that may be received from the base station for the UE to perform the initial access procedure.

FIGS.7A and7Billustrate examples of an initial access structure of a method of wireless communication.FIG.7Aillustrates an example700including the SSB and the CORESET grouped in the time domain in a single block. That is, the example700may include an SSB/CORESET block (SSCB) including the SSB and the CORESET of the same beam time-division multiplexed in a single block. In some aspects, the CORESET may include CORESET0. The SS, the PBCH, and the CORESET0 in the SSCB may be associated with the same beam, and the SSCB may omit beam switching gaps between the SS, the PBCH, and the CORESET0 in the SSCB. The switching gaps may be provided between the SSCBs for different beams. The example700may provide that a first beam switching gap712is provided after a first SSCB702for a first beam and before a second SSCB704for a second beam and that a second beam switching gap714is provided after the second SSCB704for the second beam.

FIG.7Billustrates an example750, including the SSB and the CORESET grouped in the frequency domain in a single block. That is, the example750may include an SSCB including the SSB and the CORESET of the same beam frequency-division multiplexed in a single block. In some aspects, the CORESET may include CORESET0. The SS, the PBCH, and the CORESET0 associated with the same beam may be included in the SSCB, and the SSCB may share a single beam switching gap after the SSCB. The switching gaps may be provided between the SSCBs for different beams. The example750may provide that a first beam switching gap762is provided after a first SSCB752for a first beam and before a second SSCB754for a second beam, and that a second beam switching gap764is provided after the second SSCB754for the second beam.

FIGS.8A and8Billustrate examples of an initial access structure of a method of wireless communication. In some aspects, the contents of PBCH/MIB and DCI 1_0 (with SI-RNTI) may be consolidated in a single message/channel to reduce the CRC overhead. That is, at least one channel/message structure that combines the information in both PBCH/MIB and DCI 1_0 with a CRC scrambled with SI-RNTI may be provided. Here, the combined information from the PBCH/MIB and DCI 1_0 may refer to as the initial access information message.FIG.8Aillustrates an example800, including a PBCH802carrying the initial access information message. That is, the PBCH802may carry the scheduling information for the SIB1 PDSCH812.FIG.8Billustrates an example850that may carry the initial access information message using a message similar to DCI804using a PDCCH sent on a CORESET/search space806. That is, the example850may include the CORESET806carrying the DCI804with the scheduling information for the SIB1 PDSCH812.

In some aspects, SIB1 may refer to the SIB that may be carrying the cell access information. That is, the SIB1 PDSCH may be scheduled using DCI 1_0 with SI-RNTI transmitted on search space 0 within CORESET0.

The DCI may include a start and length indicator value (SLIV) for scheduling the SIB1 PDSCH, and the SLIV may indicate an index into a table. In one aspect, the table may be a default PDSCH time domain resource allocation table. Based on the SLIV, the time domain resource assignment (TDRA) and the frequency domain resource assignment (FDRA) for the SIB1 PDSCH for each beam maybe be signaled separately. However, in single carrier waveforms, time-division multiplexing may be used to multiplex messages, and frequency-division multiplexing may not be available.

In one aspect, the DCI 1_0 and MIB (or SSB and CORESET0) may be merged to provide a relatively lighter TDRA and time-domain allocation techniques for the SIB1 PDSCH to reduce the signaling bits. In another aspect, the DCI and the scheduled SIB1 PDSCH may be provided in the same slot. In another aspect, the beam switching gap may be provided between SIB1 PDSCHs of different beams. In another aspect, the base station may complete the SIB1 beam sweep in a short time to increase the scheduling flexibility for other messages.

FIG.9illustrates examples of a PDSCH cluster for a method of wireless communication.FIG.9includes an example of an SSB/CORESET cluster900and an example of a SIB PDSCH cluster950. The example of an SSB/CORESET cluster900may include an SS or an SSB (SS/SSB), a PBCH or a CORESET (PBCH/CORESET), or a switching gap. That is, the example of an SSB/CORESET cluster900may include a first SS/SSB912, a first PBCH/CORESET914time-division multiplexed with the first SS/SSB, or a switching gap916time-division multiplexed with the first PBCH/CORESET914. The example of SSB/CORESET cluster900may also include a second SS/SSB922, a second PBCH/CORESET924time-division multiplexed with the first SS/SSB, or a switching gap926time-division multiplexed with the second PBCH/CORESET924. In some aspects, the SS/SSB of the SSB/CORESET cluster may include scheduling information of the corresponding PBCH/CORESET. The first SS/SSB912may include scheduling information of the first PBCH/CORESET914, and the second SS/SSB922may include scheduling information of the second PBCH/CORESET924. In some aspects, the PBCH/CORESET may carry the initial access information message. That is, the PBCH/CORESET may carry the scheduling information for the corresponding SIB1 PDSCH of the SIB PDSCH cluster. The scheduling information for the SIB1 PDSCH may include at least one parameter of the corresponding SIB1 PDSCH.

In some aspects, the SIB PDSCH cluster950may include one or more SIB1 PDSCHs972,976,982, and986for multiple beams formed into a cluster based on at least one parameter. At least one parameter may include a starting time of the SIB PDSCH cluster, a length, i.e., a number of symbols, of each PDSCH of different beams, or a bandwidth of the SIB PDSCH cluster. The starting time of the SIB PDSCH cluster may be represented in a form of SFN, slot, or symbol. At least one parameter may also include an additional time allocated for an additional message or switching gap974,978,984, and988between each PDSCH of different beams. In some aspects, the additional time may include the beam switching gap between each PDSCH of different beams.

At least one parameter of the SIB PDSCH cluster may be indicated in various formats. In one aspect, at least one parameter of the SIB PDSCH cluster may be indicated explicitly. In another aspect, at least one parameter of the SIB PDSCH cluster may be indicated using an index to a specified table. That is, the UE and the base station may share the specified table including multiple options for at least one parameter of the SIB PDSCH cluster. In another aspect, at least one parameter of the SIB PDSCH cluster may be indicated as a combination of sending an explicit indication and using the index to the specified table.

In some aspects, the starting time of the SIB1 PDSCH cluster may be configured in various formats. In one aspect, the starting time of the SIB1 PDSCH cluster may be configured in terms of an absolute value. For example, the starting time of the SIB1 PDSCH cluster may be configured in terms of the SFN, the slot index, etc. In another aspect, the starting time of the SIB1 PDSCH cluster may be configured in terms of a relative value. For example, the starting time of the SIB1 PDSCH cluster may be configured relative to a certain reference time, e.g., an end, of the SSB/CORESET0 cluster.

In some aspects, the bandwidth of the SIB1 PDSCH cluster may be configured in various formats. In one aspect, the bandwidth of the SIB1 PDSCH cluster may be configured in terms of an absolute value, e.g., frequency. In another aspect, the bandwidth of the SIB1 PDSCH cluster may be configured in terms of a relative value. For example, the bandwidth of the SIB1 PDSCH cluster may be configured relative to a bandwidth of a specific channel in the SSB/CORESET0 cluster, e.g., the SS, the SSB, the PBCH, or the CORESET0.

In some aspects, one or more parameters of the SIB PDSCH cluster may be configured in various ways. In one aspect, one or more parameters of the SIB PDSCH cluster may be specified. In another aspect, at least one parameter of the SIB PDSCH cluster may be configurable using a message/channel in the SSB/CORESET cluster. In another aspect, some of one or more parameters of the SIB PDSCH cluster may be specified, and the others of one or more parameters of the SIB PDSCH cluster may be configured by a message/channel in the SSB/CORESET cluster.

In some aspects, the message/channel of the SSB/CORESET cluster may indicate or configure one or more parameters of the SIB PDSCH cluster. In one aspect, one or more parameters of the SIB PDSCH cluster may be configured the same for all beams. The UE may decode the SSB/CORESET cluster and may derive the location of the corresponding SIB1 PDSCHs based on the beam indexes.

Referring toFIG.9, the first PBCH/CORESET914may indicate or configure the one or more parameters of the SIB PDSCH cluster950to be the same for all beams. In one aspect, the first PDSCH/CORESET914may indicate or configure the same SIB1 PDSCH length and the same additional time between beams for all beams. Accordingly, the base station may schedule a first SIB1 PDSCH972for a first beam (b1), a second SIB1 PDSCH974for a second beam (b2), a third SIB1 PDSCH982for a third beam (b3), and a fourth SIB1PDSCH986for a fourth beam (b4) to have the same SIB1 PDSCH length, and a first additional message974for the first beam (b1), a second additional message978for the second beam (b2), a third additional message984for the third beam (b3), and a fourth additional message988for the fourth beam (b4) to have the same additional time. The UE may decode the first SIB1 PDSCH972for the first beam (b1), the second SIB1 PDSCH974for the second beam (b2), the third SIB1 PDSCH982for the third beam (b3), and the fourth SIB1 PDSCH986for the fourth beam (b4) based on the same SIB1 PDSCH length, and the first additional message974for the first beam (b1), the second additional message978for the second beam (b2), the third additional message984for the third beam (b3), and the fourth additional message988for the fourth beam (b4) based on the same additional time.

In another aspect, the one or more parameters of the SIB PDSCH cluster may be divided into two or more sub-clusters. For example, a first sub-cluster including SIB PDSCHs of the first set of beams may use the first set of configurations, and a second sub-cluster including SIB PDSCHs of the second set of beams may use the second set of configurations. In one aspect, the SSB/CORESET cluster900may indicate or configure a first SIB1 PDSCH length and a first additional time for the first beam (b1) and the second beam (b2), and a second SIB1 PDSCH length and a second additional time for the third beam (b3) and the fourth beam (b4). Accordingly, the base station may schedule the first SIB1 PDSCH972for the first beam (b1) and the second SIB1 PDSCH974for the second beam (b2) with the first SIB1 PDSCH length, the third SIB1 PDSCH982for the third beam (b3) and the fourth SIB1 PDSCH986for the fourth beam (b4) with the second SIB1 PDSCH length, the first additional message974for the first beam (b1) and the second additional message978for the second beam (b2) with the first additional time, and the third additional message984for the third beam (b3) and the fourth additional message988for the fourth beam (b4) with the second additional time. The UE may decode the first SIB1 PDSCH972for the first beam (b1) and the second SIB1 PDSCH974for the second beam (b2) based on the first SIB1 PDSCH length, the third SIB1 PDSCH982for the third beam (b3), and the fourth SIB1 PDSCH986for the fourth beam (b4) based on the second SIB1 PDSCH length, the first additional message974for the first beam (b1) and the second additional message978for the second beam (b2) based on the first additional time, and the third additional message984for the third beam (b3) and the fourth additional message988for the fourth beam (b4) based on the second additional time.

In another aspect, one or more parameters of the SIB PDSCH cluster may be configured to be beam specific. That is, one or more parameters may be configured to be specific for each SIB PDSCH of each beam. In one aspect, the SSB/CORESET cluster900may indicate or configure a beam specific SIB1 PDSCH length and a beam specific additional time respectively for the SIB1 PDSCHs972,976,982, and986and the additional messages974,978,984, and988of the first beam (b1), the second beam (b2), the third beam (b3), and the fourth beam (b4).

FIG.10is a communication diagram1000of a method of wireless communication. The communication diagram1000includes a UE1002and a base station1004.

At1006, the base station may determine one or more parameters of a PDSCH group including multiple PDSCHs for each beam in a plurality of beams, the one or more parameters of the PDSCH group including at least one of a starting time of the PDSCH group, a time period between the multiple PDSCHs of different beams in the plurality of beams, a symbol length of PDSCHs of different beams in the plurality of beams, or a bandwidth of the PDSCHs.

In one aspect, the time period between the multiple PDSCHs of different beams may include beam switching gaps of the plurality of beams. In one aspect, at least one parameter of one or more parameters of the PDSCH group may be preconfigured or predefined.

At1008, the base station may configure a plurality of resources for communication via the PDSCH group based on the determined one or more parameters of the PDSCH group.

In some aspects, the PDSCH group may include a system information block (SIB) PDSCH.

At1010, the base station may transmit, to a UE, an indication of at least one parameter of the one or more parameters of the PDSCH group for communication via the plurality of resources. The UE may receive, from the base station, the indication of at least one parameter of the one or more parameters of the PDSCH group for communication via the plurality of resources. In one aspect, at least one indication of at least one parameter of the one or more parameters of the PDSCH group may include an index to a set of one or more parameters.

In one aspect, at least one indication of at least one parameter of the one or more parameters of the PDSCH group may be configured for the plurality of beams. In another aspect, at least one indication of at least one parameter of the one or more parameters of the PDSCH group may be configured for a subset of beams of the plurality of beams. In another aspect, at least one indication of at least one parameter of the one or more parameters of the PDSCH group may be configured specifically for each beam of the plurality of beams.

In one aspect, the starting time of the PDSCH group may include an absolute time domain value. In another aspect, the starting time of the PDSCH group may include a relative time domain value in reference to the SS cluster. In another aspect, the bandwidth of the PDSCH group may include an absolute frequency domain value. In another aspect, the bandwidth of the PDSCH group may include a relative time domain value in reference to the SS cluster.

At1012, the base station may transmit, to the UE, an SS cluster for each beam in the plurality of beams, the SS cluster including at least one of a PBCH or a CORESET. The UE may receive, from the base station, the SS cluster for each beam in the plurality of beams. In some aspects, at least one of the PBCH or the CORESET includes at least one indication of at least one parameter of the one or more parameters of the PDSCH group.

At1014, the base station may transmit, to the UE via the plurality of resources, one or more PDSCHs based on the at least one parameter of the one or more parameters of the PDSCH group transmitted to the UE. The UE may receive, from the base station via the plurality of resources, one or more PDSCHs based on the at least one parameter of the one or more parameters of the PDSCH group received from the base station.

FIG.11is a flowchart1100of a method of wireless communication. The method may be performed by a UE (e.g., the UE104/1002; the apparatus1302).

At1102, the UE may be configured to receive, from a base station, an indication of at least one parameter of the one or more parameters of the PDSCH group for communication via the plurality of resources. In one aspect, at least one indication of at least one parameter of the one or more parameters of the PDSCH group may include an index to a set of one or more parameters. For example,1102may be performed by a PDSCH group processing component1340.

In one aspect, at least one indication of at least one parameter of the one or more parameters of the PDSCH group may be configured for the plurality of beams. In another aspect, at least one indication of at least one parameter of the one or more parameters of the PDSCH group may be configured for a subset of beams of the plurality of beams. In another aspect, at least one indication of at least one parameter of the one or more parameters of the PDSCH group may be configured specifically for each beam of the plurality of beams.

In one aspect, the starting time of the PDSCH group may include an absolute time domain value. In another aspect, the starting time of the PDSCH group may include a relative time domain value in reference to the SS cluster. In another aspect, the bandwidth of the PDSCH group may include an absolute frequency domain value. In another aspect, the bandwidth of the PDSCH group may include a relative time domain value in reference to the SS cluster.

At1104, the UE may be configured to receive, from the base station, the SS cluster for each beam in the plurality of beams, the SS cluster including at least one of a PBCH or a CORESET. In some aspects, at least one of the PBCH or the CORESET includes at least one indication of at least one parameter of the one or more parameters of the PDSCH group. For example,1104may be performed by an SS cluster processing component1342.

At1106, the UE may be configured to receive, from the base station via the plurality of resources, one or more PDSCHs based on the at least one parameter of the one or more parameters of the PDSCH group received from the base station. For example,1106may be performed by the PDSCH group processing component1340.

FIG.12is a flowchart1200of a method of wireless communication. The method may be performed by a base station (e.g., the base station102/180; the apparatus1402).

At1202, the base station may be configured to determine one or more parameters of a PDSCH group including multiple PDSCHs for each beam in a plurality of beams, the one or more parameters of the PDSCH group including at least one of a starting time of the PDSCH group, a time period between the multiple PDSCHs of different beams in the plurality of beams, a symbol length of PDSCHs of different beams in the plurality of beams, or a bandwidth of the PDSCH group. In one aspect, the time period between the multiple PDSCHs of different beams may include beam switching gaps of the plurality of beams. In one aspect, at least one parameter of one or more parameters of the PDSCH group may be preconfigured or predefined. For example,1202may be performed by a PDSCH group managing component1440.

At1204, the base station may configure a plurality of resources for communication via the PDSCH group based on the determined one or more parameters of the PDSCH group. In some aspects, the PDSCH group may include a SIB PDSCH. For example,1204may be performed by the PDSCH group managing component1440.

At1206, the base station may be configured to transmit, to a UE, an indication of at least one parameter of the one or more parameters of the PDSCH group for communication via the plurality of resources. In one aspect, at least one indication of at least one parameter of the one or more parameters of the PDSCH group may include an index to a set of one or more parameters. For example,1206may be performed by the PDSCH group managing component1440.

In one aspect, at least one indication of at least one parameter of the one or more parameters of the PDSCH group may be configured for the plurality of beams. In another aspect, at least one indication of at least one parameter of the one or more parameters of the PDSCH group may be configured for a subset of beams of the plurality of beams. In another aspect, at least one indication of at least one parameter of the one or more parameters of the PDSCH group may be configured specifically for each beam of the plurality of beams.

In one aspect, the starting time of the PDSCH group may include an absolute time domain value. In another aspect, the starting time of the PDSCH group may include a relative time domain value in reference to the SS cluster. In another aspect, the bandwidth of the PDSCH group may include an absolute frequency domain value. In another aspect, the bandwidth of the PDSCH group may include a relative time domain value in reference to the SS cluster.

At1208, the base station may be configured to transmit, to the UE, an SS cluster for each beam in the plurality of beams, the SS cluster including at least one of a PBCH or a CORESET. In some aspects, at least one of the PBCH or the CORESET includes at least one indication of at least one parameter of the one or more parameters of the PDSCH group. For example,1208may be performed by an SS cluster managing component1442.

At1210, the base station may be configured to transmit, to the UE via the plurality of resources, one or more PDSCHs based on the at least one parameter of the one or more parameters of the PDSCH group transmitted to the UE. For example,1210may be performed by the PDSCH group managing component1440.

FIG.13is a diagram1300illustrating an example of a hardware implementation for an apparatus1302. The apparatus1302is a UE and includes a cellular baseband processor1304(also referred to as a modem) coupled to a cellular RF transceiver1322and one or more subscriber identity modules (SIM) cards1320, an application processor1306coupled to a secure digital (SD) card1308and a screen1310, a Bluetooth module1312, a wireless local area network (WLAN) module1314, a Global Positioning System (GPS) module1316, and a power supply1318. The cellular baseband processor1304communicates through the cellular RF transceiver1322with the UE104and/or BS102/180. The cellular baseband processor1304may include a computer-readable medium/memory. The computer-readable medium/memory may be non-transitory. The cellular baseband processor1304is responsible for general processing, including the execution of software stored on the computer-readable medium/memory. The software, when executed by the cellular baseband processor1304, causes the cellular baseband processor1304to perform the various functions described supra. The computer-readable medium/memory may also be used for storing data that is manipulated by the cellular baseband processor1304when executing software. The cellular baseband processor1304further includes a reception component1330, a communication manager1332, and a transmission component1334. The communication manager1332includes the one or more illustrated components. The components within the communication manager1332may be stored in the computer-readable medium/memory and/or configured as hardware within the cellular baseband processor1304. The cellular baseband processor1304may be a component of the UE350and may include the memory360and/or at least one of the TX processor368, the RX processor356, and the controller/processor359. In one configuration, the apparatus1302may be a modem chip and include just the baseband processor1304, and in another configuration, the apparatus1302may be the entire UE (e.g., see350ofFIG.3) and include the aforediscussed additional modules of the apparatus1302.

The communication manager1332includes a PDSCH group processing component1340that is configured to receive an indication of at least one parameter of the one or more parameters of the PDSCH group for communication via the plurality of resources, and receive via the plurality of resources, one or more PDSCHs based on the at least one parameter of the one or more parameters of the PDSCH group, e.g., as described in connection with1102and1106. The communication manager1332further includes an SS cluster processing component1342that is configured to receive, from the base station, the SS cluster for each beam in the plurality of beams, the SS cluster including at least one of a PBCH or a CORESET, e.g., as described in connection with1104.

In one configuration, the apparatus1302, and in particular the cellular baseband processor1304, includes means for receiving, from a base station, an indication of at least one parameter of a PDSCH group including multiple PDSCHs for each beam in a plurality of beams, and means for receiving, from the base station via a plurality of resources, one or more PDSCHs based on the indication of the at least one parameter of the PDSCH group. The apparatus1302includes means for receiving an SS cluster for each beam in the plurality of beams, the SS cluster including at least one of a PBCH or a CORESET. The aforementioned means may be one or more of the aforementioned components of the apparatus1302configured to perform the functions recited by the aforementioned means. As described supra, the apparatus1302may include the TX Processor368, the RX Processor356, and the controller/processor359. As such, in one configuration, the aforementioned means may be the TX Processor368, the RX Processor356, and the controller/processor359configured to perform the functions recited by the aforementioned means.

FIG.14is a diagram1400illustrating an example of a hardware implementation for an apparatus1402. The apparatus1402is a BS and includes a baseband unit1404. The baseband unit1404may communicate through a cellular RF transceiver1422with the UE104. The baseband unit1404may include a computer-readable medium/memory. The baseband unit1404is responsible for general processing, including the execution of software stored on the computer-readable medium/memory. The software, when executed by the baseband unit1404, causes the baseband unit1404to perform the various functions described supra. The computer-readable medium/memory may also be used for storing data that is manipulated by the baseband unit1404when executing software. The baseband unit1404further includes a reception component1430, a communication manager1432, and a transmission component1434. The communication manager1432includes the one or more illustrated components. The components within the communication manager1432may be stored in the computer-readable medium/memory and/or configured as hardware within the baseband unit1404. The baseband unit1404may be a component of the BS310and may include the memory376and/or at least one of the TX processor316, the RX processor370, and the controller/processor375.

The communication manager1432includes a PDSCH group managing component1440that is configured to determine one or more parameters of a PDSCH group including multiple PDSCHs for each beam in a plurality of beams, configure a plurality of resources for communication via the PDSCH group based on the determined one or more parameters of the PDSCH group, transmit an indication of at least one parameter of the one or more parameters of the PDSCH group for communication via the plurality of resources, and transmit, to the UE via the plurality of resources, one or more PDSCHs based on the at least one parameter of the one or more parameters of the PDSCH group, e.g., as described in connection with1202,1204,1206, and1210. The communication manager1432further includes an SS cluster managing component1442that is configured to transmit an SS cluster for each beam in the plurality of beams, the SS cluster including at least one of a PBCH or a CORESET, e.g., as described in connection with1208.

In one configuration, the apparatus1402, and in particular the baseband unit1404, includes means for determining one or more parameters of a PDSCH group including multiple PDSCHs for each beam in a plurality of beams, means for configuring a plurality of resources for communication via the PDSCH group based on the determined one or more parameters of the PDSCH group, and means for transmitting, to a UE), an indication of at least one parameter of the one or more parameters of the PDSCH group for communication via the plurality of resources. The apparatus1402includes means for transmitting, via the plurality of resources, one or more PDSCHs based on the at least one parameter of the one or more parameters of the PDSCH group. The apparatus1402includes means for transmitting an SS cluster for each beam in the plurality of beams, the SS cluster including at least one of a PBCH or a CORESET. The aforementioned means may be one or more of the aforementioned components of the apparatus1402configured to perform the functions recited by the aforementioned means. As described supra, the apparatus1402may include the TX Processor316, the RX Processor370, and the controller/processor375. As such, in one configuration, the aforementioned means may be the TX Processor316, the RX Processor370, and the controller/processor375configured to perform the functions recited by the aforementioned means.

A base station may determine one or more parameters of a PDSCH group including multiple PDSCHs for each beam in a plurality of beams, the one or more parameters of the PDSCH group including at least one of a starting time of the PDSCH group, a time period between the multiple PDSCHs of different beams in the plurality of beams, a symbol length of PDSCHs of different beams in the plurality of beams, or a bandwidth of the PDSCH group, configure a plurality of resources for communication via the PDSCH group based on the determined one or more parameters of the PDSCH group, and transmit, to a UE, an indication of at least one parameter of the one or more parameters of the PDSCH group for communication via the plurality of resources. The base station may also transmit, to the UE via the plurality of resources, one or more PDSCHs based on the at least one parameter of the one or more parameters of the PDSCH group.

The UE may receive, from the base station, the indication of at least one parameter of the PDSCH group including multiple PDSCHs for each beam in a plurality of beams, and receive, from the base station via the plurality of resources, one or more PDSCHs based on the indication of the at least one parameter of the PDSCH group.

In one aspect, the PDSCH group may include a SIB PDSCH. In one aspect, the time period between the multiple PDSCHs of different beams may include beam switching gaps of the plurality of beams. In one aspect, at least one parameter of one or more parameters of the PDSCH group may be preconfigured or predefined.

The base station may further transmit, to the UE, an SS cluster for each beam in the plurality of beams, the SS cluster including at least one of a PBCH or a CORESET. The UE may receive, from the base station, the SS cluster for each beam in the plurality of beams.

In one aspect, at least one of the PBCH or the CORESET may include at least one indication of at least one parameter of the one or more parameters of the PDSCH group. In another aspect, at least one indication of at least one parameter of the one or more parameters of the PDSCH group is configured for the plurality of beams. In another aspect, at least one indication of at least one parameter of the one or more parameters of the PDSCH group is configured for a subset of beams of the plurality of beams. In another aspect, at least one indication of at least one parameter of the one or more parameters of the PDSCH group is configured specifically for each beam of the plurality of beams.

In one aspect, at least one indication of at least one parameter of the one or more parameters of the PDSCH group may include an index to a set of one or more parameters. In another aspect, the starting time of the PDSCH group may include an absolute time domain value. In another aspect, the starting time of the PDSCH group may include a relative time domain value in reference to the SS cluster. In one aspect, the bandwidth of the PDSCH group may include an absolute frequency domain value. In another aspect, the bandwidth of the PDSCH group may include a relative time domain value in reference to the SS cluster.

Aspect 1 is a method of wireless communication at a base station, the method including determining one or more parameters of a PDSCH group including multiple PDSCHs for each beam in a plurality of beams, the one or more parameters of the PDSCH group including at least one of a starting time of the PDSCH group, a time period between the multiple PDSCHs of different beams in the plurality of beams, a symbol length of PDSCHs of different beams in the plurality of beams, or a bandwidth of the PDSCH group, configuring a plurality of resources for communication via the PDSCH group based on the determined one or more parameters of the PDSCH group, and transmitting, to a UE, an indication of at least one parameter of the one or more parameters of the PDSCH group for communication via the plurality of resources.

Aspect 2 is the method of aspect 1, where the PDSCH group includes a SIB PDSCH.

Aspect 3 is the method of any of aspects 1 and 2, further including transmitting, to the UE via the plurality of resources, one or more PDSCHs based on the at least one parameter of the one or more parameters of the PDSCH group.

Aspect 4 is the method of any of aspects 1 to 3, where the time period between the multiple PDSCHs of different beams includes beam switching gaps of the plurality of beams.

Aspect 5 is the method of any of aspects 1 to 4, where at least one parameter of the one or more parameters of the PDSCH group is predefined.

Aspect 6 is the method of any of aspects 1 to 5, further including transmitting, to the UE, an SS cluster for each beam in the plurality of beams, the SS cluster including at least one of a PBCH or a CORESET, where at least one of the PBCH or the CORESET includes at least one indication of at least one parameter of the one or more parameters of the PDSCH group.

Aspect 7 is the method of aspect 6, where at least one indication of at least one parameter of the one or more parameters of the PDSCH group is configured for the plurality of beams.

Aspect 8 is the method of aspect 6, where at least one indication of at least one parameter of the one or more parameters of the PDSCH group is configured for a subset of beams of the plurality of beams.

Aspect 9 is the method of aspect 6, where at least one indication of at least one parameter of the one or more parameters of the PDSCH group is configured specifically for each beam of the plurality of beams.

Aspect 10 is the method of aspect 6, where at least one indication of at least one parameter of the one or more parameters of the PDSCH group includes an index to a set of one or more parameters.

Aspect 11 is the method of any of aspects 6 to 10, where the starting time of the PDSCH group includes an absolute time domain value.

Aspect 12 is the method of any of aspects 6 to 10, where the starting time of the PDSCH group includes a relative time domain value in reference to the SS cluster.

Aspect 13 is the method of any of aspects 6 to 10, where the bandwidth of the PDSCH group includes an absolute frequency domain value.

Aspect 14 is the method of any of aspects 6 to 10, where the bandwidth of the PDSCH group includes a relative time domain value in reference to the SS cluster.

Aspect 15 is an apparatus for wireless communication including at least one processor coupled to a memory and configured to implement a method as in any of aspects 1 to 14.

Aspect 16 is an apparatus for wireless communication including means for implementing a method as in any of aspects 1 to 14.

Aspect 17 is a computer-readable medium storing computer executable code, where the code when executed by a processor causes the processor to implement a method as in any of aspects 1 to 14.

Aspect 18 is a method of wireless communication at a UE, the method including receiving, from a base station, an indication of at least one parameter of a PDSCH group including multiple PDSCHs for each beam in a plurality of beams, the at least one parameter of the PDSCH group including at least one of a starting time of the PDSCH group, a time period between PDSCHs of different beams in the plurality of beams, a symbol length of PDSCHs of different beams in the plurality of beams, or a bandwidth of the PDSCH group, and receiving, from the base station via a plurality of resources, one or more PDSCHs based on the indication of the at least one parameter of the PDSCH group.

Aspect 19 is the method of aspect 18, where the PDSCH group includes a SIB PDSCH.

Aspect 20 is the method of any of aspects 18 and 19, where the time period between the multiple PDSCHs of different beams includes beam switching gaps of the plurality of beams.

Aspect 21 is the method of any of aspects 18 to 20, where at least one parameter of the PDSCH group is predefined.

Aspect 22 is the method of any of aspects 18 to 21, further including receiving, from the base station, an SS cluster for each beam in the plurality of beams, the SS cluster including at least one of a PBCH or a CORESET, where at least one of the PBCH or the CORESET includes at least one indication of at least one parameter of the PDSCH group.

Aspect 23 is the method of aspect 22, where at least one indication of at least one parameter of the PDSCH group is configured for the plurality of beams.

Aspect 24 is the method of aspect 22, where at least one indication of at least one parameter of the PDSCH group is configured for a subset of beams of the plurality of beams.

Aspect 25 is the method of aspect 22, where at least one indication of at least one parameter of the PDSCH group is configured specifically for each beam of the plurality of beams.

Aspect 26 is the method of aspect 22, where at least one indication of at least one parameter of the PDSCH group includes an index to a set of one or more parameters.

Aspect 27 is the method of any of aspects 22 to 26 where the starting time of the PDSCH group includes an absolute time domain value.

Aspect 28 is the method of any of aspects 22 to 26, where the starting time of the PDSCH group includes a relative time domain value in reference to the SS cluster.

Aspect 29 is the method of any of aspects 22 to 28 where the bandwidth of the PDSCH group includes an absolute frequency domain value.

Aspect 30 is the method of any of aspects 22 to 28 where the bandwidth of the PDSCH group includes a relative time domain value in reference to the SS cluster.

Aspect 31 is an apparatus for wireless communication including at least one processor coupled to a memory and configured to implement a method as in any of aspects 18 to 30.

Aspect 32 is an apparatus for wireless communication including means for implementing a method as in any of aspects 18 to 30.

Aspect 33 is a computer-readable medium storing computer executable code, where the code when executed by a processor causes the processor to implement a method as in any of aspects 18 to 30.