Samsung Electronics Co., Ltd.

Yingzhe Li

Hongbo Si

Qiongjie Lin

Aris Papasakellariou

Le Liu

Eun Sun Kim

Boon Loong Ng

Young-Han Nam

Thomas David Novlan

Hao Chen

A method and apparatus of a user equipment (UE) in a wireless communication system is provided. The method and apparatus comprises: receiving a synchronization signals and physical broadcast channel (SS/PBCH) block; determining whether a shared spectrum channel access is enabled; determining a first index of the SS/PBCH block as a candidate SS/PBCH block index (I) based on a number of candidate SS/PBCH blocks in a half frame; and determining a second index of the SS/PBCH block as an SS/PBCH block index (I) based on a quasi-co-location (QCL) parameter (Q) indicated by a PBCH in the SS/PBCH block, wherein the SS/PBCH block index (I) is determined as: I=Imod Q based on a determination that the shared spectrum channel access is enabled, where mod is a modular operation; or I=Ibased on the determination that the shared spectrum channel access is not enabled.

Method and apparatus for indexing of SS/PBCH block in unlicensed spectrum

A UE in a wireless communication system is provided. The UE comprises a transceiver configured to receive SS/PBCH block over downlink channels using a set of parameters based on an operation mode. The operation mode is configured for the SS/PBCH block as a first operation mode in which the SS/PBCH block is used on a LAA Scell or a second operation mode in which the SS/PBCH block is at least used on a Pcell. The set of parameters is configured as a first set of parameters for the SS/PBCH block when the operation mode of the SS/PBCH block is configured as the first operation mode or a second set of parameters for the SS/PBCH block when the operation mode of the SS/PBCH block is configured as the second operation mode. The first and second set of parameters include different information each other.

Method and apparatus for supporting large subcarrier spacing for SS/PBCH block

A method and apparatus in a wireless communication system supporting a semi-static shared spectrum channel access is provided. The method and apparatus comprises: receiving system information carried by downlink channels; identifying a duration of idle period, a fixed frame period, a number of observation slots, and an index; determining a first phase based on a first time period between a starting instance of the idle period and an ending instance of the at least one observation slot, a second phase based on a second time period between the ending instance of the at least one observation slot and an ending instance of the idle period, and a third phase based on a third time period between the ending instance of the idle period and an ending instance of the fixed frame period; and identifying the downlink channels as an idle state in the at least one observation slot.

Method and apparatus for frame based equipment operation of NR unlicensed

A method of a UE in a wireless communication system supporting a shared spectrum channel access is provided. The UE comprises: receiving, from a BS over a first downlink channel, a SS/PBCH block; determining a transmission window in which the received SS/PBCH block is located; determining whether a CORESET for Type0-PDCCH CSS is present based on the received SS/PBCH block; determining a parameter for a QCL assumption of candidate SS/PBCH blocks within the transmission window; determining a group of QCLed candidate SS/PBCH blocks within the transmission window based on the determined parameter for the QCL assumption; determining a group of slots including the Type0-PDCCH CSS, wherein each slot of the group of slots corresponds to a candidate SS/PBCH block within the group of QCLed candidate SS/PBCH blocks; and receiving, over a second downlink channel, at least one Type0-PDCCH based on the determined groups of slots including the Type0-PDCCH CSS.

Method and apparatus for configuration of common search space for discovery signal and channel

A method and apparatus in a wireless communication system is provided. The method and apparatus comprise: receiving an SS/PBCH block; determining a subcarrier spacing of the SS/PBCH block from a set of subcarrier spacings {SCS, SCS}; determining a subcarrier spacing of a Type0-PDCCH CSS set in a CORESET, the subcarrier spacing of the Type0-PDCCH CSS set is the same as the subcarrier spacing of the SS/PBCH block; determining a bandwidth and a number of symbols of the CORESET based on an MIB in the SS/PBCH block; determining a frequency offset from a set of frequency offsets {O, O}, the frequency offset is determined as being from a smallest RB index of the CORESET to a smallest RB index of the common RB overlapping with a first RB of the SS/PBCH block; determining a frequency location of the CORESET; and receiving a Type0-PDCCH.

Method and apparatus for coreset configuration of unlicensed bands

A UE in a wireless communication system is provided. The UE comprises at least one processor configured to identify a DTTC including at least one of a first periodicity, a duration of a first transmission window, or a first timing offset of the first transmission window, wherein the DTTC is identified for the DSCH or RLM in a serving cell, and identify a DMTC including at least one of a second periodicity, a duration of a second transmission window, or a second timing offset of the second transmission window, wherein the DMTC is identified for RRM measurement based on the DSCH. The UE further comprises a transceiver operably connected to the processor, the transceiver configured to receive, from a BS, at least one DSCH from a set of DSCH over unlicensed downlink channels based on the identified DTTC, wherein the received at least one DSCH includes a SS/PBCH block.

Method and apparatus for initial access block on stand-alone NR unlicensed spectrum

A UE in a wireless communication system supporting a shared spectrum channel access is provided. The method comprises: determining a set of DSCH transmission windows based on a window periodicity, a window duration, and a window offset; determining a first set of SS/PBCH blocks within a DSCH transmission window of the set of DSCH transmission windows, wherein the first set of SS/PBCH blocks is QCLed; determining a second set of SS/PBCH blocks across at least two DSCH transmission windows being different DSCH windows of the set of DSCH transmission windows, wherein the second set of SS/PBCH blocks is QCLed; and receiving at least one SS/PBCH block that is located in the first set of SS/PBCH blocks or the second set of SS/PBCH blocks based on QCL information of the first set of SS/PBCH blocks or the second set of SS/PBCH blocks within the DSCH transmission window.

Method and apparatus for timing configuration of discovery signal and channel

A method of a user equipment (UE) in a wireless communication system supporting a shared spectrum channel access is provided. The method comprises: receiving, from a base station (BS), a set of higher layer parameters including a subcarrier spacing of a physical random access channel (PRACH) preamble, a logical root index (i) for the PRACH preamble, and an index (zeroCorrelationZoneConfg); determining a sequence length (L) for the PRACH preamble based on the subcarrier spacing of the PRACH preamble; determining a physical root index (i) for the PRACH preamble based on the logical root index (i); determining a cyclic shift (N) for the PRACH preamble based on the index (zeroCorrelationZoneConfg); generating the PRACH preamble based on the determined sequence length L, the determined physical root index i, and the determined cyclic shift N; and transmitting, to the base station (BS) over the shared spectrum channel, the PRACH preamble.

Method and apparatus for wideband PRACH configuration for NR unlicensed

A base station (BS) in a wireless communication system is provided. The BS comprises a processor configured to determine frequency units within a frequency range for a bandwidth of an operating carrier, wherein a listen-before-talk (LBT) operation is performed over each of the frequency units; and determine, for each of the frequency units, a set of intended spatial transmit (TX) parameters and a set of spatial receiver (RX) parameters of the LBT operation; and determine a subset of the frequency units for a downlink transmission based on the LBT operation performed over each of the frequency units; and a transceiver operably connected to processor, which is configured to transmit, to a user equipment (UE), downlink channels using the bandwidth corresponding to the determined subset of the frequency units.

Listen-before-talk for wideband operations of NR unlicensed spectrum

Methods and apparatuses of a BSs and UEs in a wireless communication system are provided. A method of operating the UE comprises: receiving, from a BS over a shared spectrum channel, a first DCI including a COT of the BS; determining a first portion of the COT for a downlink transmission from the BS and a second portion of the COT for an uplink transmission to the BS, wherein the COT includes a gap between the first and second portions of the COT; performing a channel access procedure based on a duration of the gap; receiving the downlink transmission in the first portion of the COT; and transmitting the uplink transmission in the second portion of the COT based on a sensing status of the shared spectrum channel that is sensed as an idle state during the channel access procedure in the duration of the gap.

Method and apparatus for uplink transmissions in frame-based equipment NR unlicensed

Methods and apparatuses in a wireless communication system operating with shared spectrum channel access. A method of operating a UE includes receiving an SS/PBCH block; determining a higher-layer parameter ssb-SubcarrierOffset based on an MIB of a PBCH included in the SS/PBCH block; determining a bit (&#x101;) from a payload of the PBCH; and determining a first value (k) based on a second value (). Four LSBs of the second value () are indicated by the higher-layer parameter ssb-SubcarrierOffset and an MSB of the second value () is indicated by the bit (&#x101;).

Method and apparatus for determining subcarrier offset in unlicensed spectrum

A method and apparatus in a wireless communication system supporting shared spectrum channel access is provided. The method and apparatus comprises: receiving a set of downlink channels supporting the shared spectrum channel access; identifying, a window for SS/PBCH block transmission, a bitmap for SS/PBCH blocks (ssb-PositionsInBurst), and a parameter for QCL assumption Q; determining, based on the identified window for the SS/PBCH block transmission, the identified bitmap for the ssb-PositionsInBurst, and the identified parameter for the QCL assumption Q, a SS/PBCH block as one of: a first set of SS/PBCH blocks assumed to be transmitted by the BS, or a second set of SS/PBCH blocks not transmitted by the BS; determining a set of resources that is not available for at least one PDSCH as overlapped with the first set of SS/PBCH blocks; and receiving the at least one PDSCH based on resource other than the determined set of resources.

Method and apparatus for resource mapping of PDSCH on unlicensed spectrum

A method of a user equipment (UE) in a wireless communication system is provided. The method comprises: receiving, from a base station (BS), a set of radio resource control (RRC) parameters comprising at least one measurement object (MO); identifying, based on the at least one MO, at least one modulo value for synchronization signals and physical broadcast channel (SS/PBCH) blocks, and at least one bitmap indicating indices of the SS/PBCH blocks; identifying a set of SS/PBCH block locations based on the at least one modulo value and the at least one bitmap; performing radio resource management (RRM) measurement based on the identified set of SS/PBCH block locations; and transmitting, to the BS via an uplink channel, a measurement report message including a result of the RRM measurement.

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Sunnyvale, CA, United States of America

Yingzhe Li