# US 2021/0243609 A1 · Dynamic spectrum sharing between 4g and 5g wireless networks > Agents: this data is available as JSON from the patentgrep API and MCP server — see https://patentgrep.com/llms.txt - Number: US 2021/0243609 A1 - Document ID: US20210243609A1 - Status: Published application - Kind: A1 - Application number: 17/161,408 - Filed: 2021-01-28 - Published: 2021-08-05 - Earliest claimed: 2020-01-30 - Assignees: QUALCOMM Incorporated - Applicants: QUALCOMM Incorporated - Inventors: Jing LEI; Huilin XU; Runxin WANG; Peter Pui Lok ANG; Wanshi CHEN - Web page: https://patentgrep.com/patent/US20210243609A1 ## CPC - H04W 16/14: Spectrum sharing arrangements {between different networks} - H04B 7/0626: {Channel coefficients, e.g. channel state information [CSI]} - H04L 5/0048: {Allocation of pilot signals, i.e. of signals known to the receiver (allocation of control signalling H04L5/0053; use of control signalling H04L5/0091)} - H04L 5/0057: {Physical resource allocation for CQI} - H04W 72/21: in the uplink direction of a wireless link, i.e. towards the network - H04W 72/23: in the downlink direction of a wireless link, i.e. towards a terminal - H04L 5/0023: {Time-frequency-space} - H04L 5/0055: {Physical resource allocation for ACK/NACK (for physical mapping arrangements in ARQ protocols H04L1/1861)} - H04W 72/1215: {for collaboration of different radio technologies} - H04W 74/0833: Random access procedures, e.g. with 4-step access - H04W: WIRELESS COMMUNICATION NETWORKS (broadcast communication H04H; communication systems using wireless links for non-selective communication, e.g. wireless extensions H04M1/72) - H04B: TRANSMISSION - H04L: TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION (arrangements common to telegraphic and telephonic communication H04M) ## Abstract Aspects of the present disclosure provide various devices, methods, and systems for dynamic spectrum sharing of a spectrum between different radio access technologies and multiple frequency division duplexing modes. Dynamic spectrum sharing (DSS) is a technology that allows wireless network operators to share a spectrum between different radio access technologies (RATs). DSS allows an operator to dynamically allocate some existing 4G spectrum to 5G use to deliver 5G services using a shared spectrum. ## Claims ### Claim 1 A method for spectrum sharing in wireless communication, the method comprising: identifying a resource usage of a first radio access technology (RAT) in a resource pool for wireless communication; determining a scheduling constraint imposed by the resource usage of the first RAT for sharing the resource pool for wireless communication using a second RAT; allocating, based on the scheduling constraint, a resource of the resource pool for wireless communication using the second RAT; and communicating with a user equipment (UE) using the resource allocated to the second RAT. ### Claim 2 (depends on 1) The method of claim 1, wherein the communicating with the UE comprises communicating with the UE using half-duplex frequency division duplex (HD-FDD) with the resource allocated to the second RAT. ### Claim 3 (depends on 2) The method of claim 2, wherein identifying the resource usage comprises identifying a downlink resource usage dedicated to the first RAT, and the downlink resource usage comprises a resource of the resource pool used for at least one of: cell-specific reference signals (CRS); a physical HARQ indicator channel (PHICH); a physical control format indicator channel (PCFICH); a physical downlink shared channel (PDSCH); a channel state information reference signal (CSI-RS); a positioning reference signal (PRS); or a physical downlink control channel (PDCCH). ### Claim 4 (depends on 2) The method of claim 2, wherein identifying the resource usage comprises identifying an uplink resource usage dedicated to the first RAT, and the uplink resource usage comprises a resource of the resource pool used for at least one of: a physical random access channel (PRACH); a sounding reference signal (SRS); a physical uplink shared channel (PUSCH); or a physical uplink control channel (PUCCH). ### Claim 5 (depends on 1) The method of claim 1, wherein the scheduling constraint comprises at least one of: a time-frequency-space resource of the resource pool that is not available for wireless communication using the second RAT due to sharing a frequency spectrum including the time-frequency-space resource between the first RAT and the second RAT; a muting pattern of the first RAT; or a predetermined frequency offset from an LTE synchronization signal. ### Claim 6 (depends on 1) The method of claim 1, wherein the resource comprises a plurality of time-frequency-space resources that are grouped in one or more mini-slots based on a numerology of the second RAT, each mini-slot spanning a time interval corresponding to one or more time domain symbols based on a numerology of the first RAT or the second RAT. ### Claim 7 (depends on 6) The method of claim 6, wherein communicating with the UE comprises at least one of: repeating a signal transmission of the second RAT using the one or more mini-slots; or transmitting a signal of the second RAT using frequency hopping in the one or more mini-slots. ### Claim 8 (depends on 1) The method of claim 1, wherein communicating with the UE comprises: transmitting a synchronization signal block (SSB) of the second RAT that is not punctured by a reference signal of the first RAT, a numerology of the first RAT being different from a numerology of the second RAT. ### Claim 9 (depends on 1) The method of claim 1, wherein communicating with the UE comprises: transmitting a synchronization signal block (SSB) of the second RAT that is punctured by or rate-matched around a cell-specific reference signal, a control channel, or a semi-persistently scheduled downlink data channel of the first RAT. ### Claim 10 (depends on 1) The method of claim 1, wherein communicating with the UE comprises: transmitting a synchronization signal block (SSB) and a control resource set (CORESET) of the second RAT using time-division multiplexing, frequency-division multiplexing, or space-division-multiplexing, depending on at least one of a bandwidth constraint, a power constraint, or capabilities of the UE. ### Claim 11 (depends on 10) The method of claim 10, wherein allocating the resource comprises at least one of: allocating the resource to the SSB based on a predetermined frequency offset from a synchronization signal of the first RAT, wherein a numerology of the frequency offset is based on a numerology of the first RAT or a numerology of the second RAT; or allocating the resource to the SSB based on a predetermined slot offset from the synchronization signal of the first RAT, wherein a numerology of the slot offset is based on a numerology of the first RAT or a numerology of the second RAT. ### Claim 12 (depends on 10) The method of claim 10, wherein transmitting the SSB comprises: transmitting an SSB burst comprising a plurality of SSBs that are time-multiplexed, frequency-multiplexed, or space-multiplexed with resources of the resource pool that are dedicated to the first RAT. ### Claim 13 (depends on 1) The method of claim 1, wherein allocating the resource comprises: allocating resources of the resource pool to a random access procedure (RACH) of the second RAT that is time-multiplexed or frequency-multiplexed with one or more RACH occasions of the first RAT. ### Claim 14 (depends on 1) The method of claim 1, further comprising: determining a cell-specific slot format of the second RAT based on the scheduling constraint, wherein the cell-specific slot format comprises information for configuring at least one of a downlink mini-slot, an uplink mini-slot, a guard period mini-slot, and a special mini-slot; and transmitting a radio resource control (RRC) message including the cell-specific slot format to a user equipment using the second RAT. ### Claim 15 An apparatus for wireless communication, comprising: a communication interface configured for wireless communication using spectrum sharing between a first radio access technology (RAT) and a second RAT; a memory; and a processor operatively coupled with the communication interface and the memory, wherein the processor and the memory are configured to: identify a resource usage of the first RAT in a resource pool for wireless communication; determine a scheduling constraint imposed by the resource usage of the first RAT for sharing the resource pool for wireless communication using the second RAT; allocate, based on the scheduling constraint, a resource of the resource pool for wireless communication using the second RAT; and communicate with a user equipment (UE) using the resource allocated to the second RAT. ### Claim 16 (depends on 15) The apparatus of claim 15, wherein the processor and the memory are configured to communicate with the UE using half-duplex frequency division duplex (HD-FDD) with the resource allocated to the second RAT. ### Claim 17 (depends on 16) The apparatus of claim 16, wherein the resource usage comprises a downlink resource usage dedicated to the first RAT, and the downlink resource usage comprises a resource of the resource pool used for at least one of: cell-specific reference signals (CRS); a physical HARQ indicator channel (PHICH); a physical control format indicator channel (PCFICH); a physical downlink shared channel (PDSCH); a channel state information reference signal (CSI-RS); a positioning reference signal (PRS); or a physical downlink control channel (PDCCH). ### Claim 18 (depends on 16) The apparatus of claim 16, wherein the resource usage comprises an uplink resource usage dedicated to the first RAT, and the uplink resource usage comprises a resource of the resource pool used for at least one of: a physical random access channel (PRACH); a sounding reference signal (SRS); a physical uplink shared channel (PUSCH); or a physical uplink control channel (PUCCH). ### Claim 19 (depends on 15) The apparatus of claim 15, wherein the scheduling constraint comprises at least one of: a time-frequency-space resource of the resource pool that is not available for wireless communication using the second RAT due to sharing a frequency spectrum including the time-frequency-space resource between the first RAT and the second RAT; a muting pattern of the first RAT; or a predetermined frequency offset from an LTE synchronization signal. ### Claim 20 (depends on 15) The apparatus of claim 15, wherein the resource comprises a plurality of time-frequency-space resources that are grouped in one or more mini-slots based on a numerology of the second RAT, each mini-slot spanning a time interval corresponding to one or more time domain symbols based on a numerology of the first RAT or the second RAT . ### Claim 21 (depends on 20) The apparatus of claim 20, wherein, for communicating with the UE, the processor and the memory are further configured to at least one of: repeat a signal transmission of the second RAT using the one or more mini-slots; or transmit a signal of the second RAT using frequency hopping using the one or more mini-slots. ### Claim 22 (depends on 15) The apparatus of claim 15, wherein, for communicating with the UE, the processor and the memory are further configured to: transmit a synchronization signal block (SSB) of the second RAT that is not punctured by a reference signal of the first RAT, a numerology of the first RAT being different from a numerology of the second RAT. ### Claim 23 (depends on 15) The apparatus of claim 15, wherein, for communicating with the UE, the processor and the memory are further configured to: transmit a synchronization signal block (SSB) of the second RAT that is punctured by or rate matched around a cell-specific reference signal, a control channel, or a semi-persistently scheduled downlink data channel of the first RAT. ### Claim 24 (depends on 15) The apparatus of claim 15, wherein, for communicating with the UE, the processor and the memory are further configured to: transmit a synchronization signal block (SSB) and a control resource set (CORESET) of the second RAT using time-division multiplexing, frequency-division multiplexing, or space-division-multiplexing, depending on at least one of a bandwidth constraint, a power constraint, or capabilities of the UE. ### Claim 25 (depends on 24) The apparatus of claim 24, wherein, for allocating the resource, the processor and the memory are further configured to at least one of: allocate the resource to the SSB based on a predetermined frequency offset from a synchronization signal of the first RAT, wherein a numerology of the frequency offset is based on a numerology of the first RAT or a numerology of the second RAT; or allocate the resource to the SSB based on a predetermined slot offset from the synchronization signal of the first RAT, wherein a numerology of the slot offset is based on a numerology of the first RAT or a numerology of the second RAT. ### Claim 26 (depends on 24) The apparatus of claim 24, wherein, for transmitting the SSB, the processor and the memory are further configured to: transmit an SSB burst comprising a plurality of SSBs that are time-multiplexed, frequency-multiplexed, or space-multiplexed with resources of the resource pool that are dedicated to the first RAT. ### Claim 27 (depends on 15) The apparatus of claim 15, wherein, for allocating the resource, the processor and the memory are further configured to: allocate resources of the resource pool to a random access procedure (RACH) of the second RAT that is time-multiplexed or frequency-multiplexed with one or more RACH occasions of the first RAT. ### Claim 28 (depends on 15) The apparatus of claim 15, wherein the processor and the memory are further configured to: determine a cell-specific slot format of the second RAT based on the scheduling constraint, wherein the cell-specific slot format comprises information for configuring at least one of a downlink mini-slot, an uplink mini-slot, a guard period mini-slot, and a special mini-slot; and transmit a radio resource control (RRC) message including the cell-specific slot format to a user equipment using the second RAT. ### Claim 29 An apparatus for wireless communication using spectrum sharing, comprising: means for identifying a resource usage of a first radio access technology (RAT) in a resource pool for wireless communication; means for determining a scheduling constraint imposed by the resource usage of the first RAT for sharing the resource pool for wireless communication using a second RAT; means for allocating, based on the scheduling constraint, a resource of the resource pool for wireless communication using the second RAT; and means for communicating with a user equipment (UE) using the resource allocated to the second RAT. ### Claim 30 A non-transitory computer-readable medium storing computer-executable code at an apparatus for wireless communication using dynamic spectrum sharing, comprising code for causing a processor to: identify a resource usage of a first radio access technology (RAT) in a resource pool for wireless communication; determine a scheduling constraint imposed by the resource usage of the first RAT for sharing the resource pool for wireless communication using a second RAT; allocate, based on the scheduling constraint, a resource of the resource pool for wireless communication using the second RAT; and communicate with a user equipment (UE) using the resource allocated to the second RAT.