# US 2023/0054786 A1 · Selection of different initial bandwidth parts for reduced capability user equipment > Agents: this data is available as JSON from the patentgrep API and MCP server — see https://patentgrep.com/llms.txt - Number: US 2023/0054786 A1 - Document ID: US20230054786A1 - Status: Published application - Kind: A1 - Application number: 17/820,371 - Filed: 2022-08-17 - Published: 2023-02-23 - Earliest claimed: 2021-08-19 - Assignees: QUALCOMM Incorporated - Applicants: QUALCOMM Incorporated - Inventors: Muhammad Nazmul ISLAM; Jing Lei; Peter Gaal - Web page: https://patentgrep.com/patent/US20230054786A1 ## CPC - H04W 28/20: Negotiating bandwidth - H04B 17/309: Measuring or estimating channel quality parameters - H04W 68/00: User notification, e.g. alerting and paging, for incoming communication, change of service or the like - H04W 76/20: Manipulation of established connections - H04L 5/16: Half-duplex systems; Simplex/duplex switching; Transmission of break signals {non-automatically inverting the direction of transmission} - H04W 76/19: Connection re-establishment - H04W 76/28: Discontinuous transmission [DTX]; Discontinuous reception [DRX] - H04W 76/30: Connection release - 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 This disclosure provides systems, methods and apparatus, including computer programs encoded on computer storage media for a reduced capability (RedCap) user equipment (UE) and supporting cell. The RedCap UE is configured with multiple bandwidth parts (BWPs). A maximum bandwidth of the RedCap UE is lower than a maximum bandwidth of a non-RedCap UEs. The UE receives a cell-defining synchronization signal block (CD-SSB) that defines a shared initial downlink BWP for RedCap UEs and non-RedCap UEs. The UE switches to a separate initial downlink BWP for RedCap UEs. The UE accesses the cell via the separate initial downlink BWP. The UE receives a configuration of an active downlink BWP for RedCap UEs. The UE determines whether to switch from the active downlink BWP to the shared initial BWP or the separate initial downlink BWP to obtain information such as updated system information, system measurements, and uplink configuration information. ## Claims ### Claim 1 An apparatus for wireless communication for a reduced capability (RedCap) user equipment (UE), comprising: a transceiver; a memory storing computer-executable instructions; and a processor coupled with the transceiver and the memory and configured to execute the computer-executable instructions to: receive a cell-defining synchronization signal block (CD-SSB) that defines a shared initial downlink bandwidth part (BWP) for RedCap UEs and non-RedCap UEs; switch to a separate initial downlink BWP for RedCap UEs; access a cell via the separate initial downlink BWP; receive a configuration of an active downlink BWP for RedCap UEs; and determine whether to switch from the active downlink BWP to the shared initial BWP or the separate initial downlink BWP to obtain information. ### Claim 2 (depends on 1) The apparatus of claim 1, wherein the configuration of the active downlink BWP for RedCap UEs includes a paging search space, and wherein to determine whether to switch to the shared initial BWP or the separate initial downlink BWP to obtain the information, the processor is configured to receive a paging physical downlink control channel (PDCCH) indicating that system information has been updated. ### Claim 3 (depends on 2) The apparatus of claim 2, wherein to determine whether to switch to the shared initial BWP or the separate initial downlink BWP to obtain the information, the processor is configured to switch from the active downlink BWP to the shared initial BWP or the separate initial downlink BWP to obtain updated system information. ### Claim 4 (depends on 2) The apparatus of claim 2, wherein to determine whether to switch to the shared initial BWP or the separate initial downlink BWP to obtain the information, the processor is configured to decode a broadcast or multicast physical downlink shared channel (PDSCH) carrying updated system information scheduled by the paging PDCCH on the active downlink BWP for RedCap UEs. ### Claim 5 (depends on 2) The apparatus of claim 2, wherein the paging search space is jointly or separately configured with a wake-up signal search space. ### Claim 6 (depends on 2) The apparatus of claim 2, wherein the RedCap UE operates in half-duplex frequency domain duplexing (HD-FDD) on the active downlink BWP and receiving the paging search space is prioritized over uplink transmissions when paging occasions overlap with semi-static or dynamically configured uplink transmissions. ### Claim 7 (depends on 1) The apparatus of claim 1, wherein no paging search space is configured on the active downlink BWP for RedCap UEs and wherein to determine whether to switch to the shared initial BWP or the separate initial downlink BWP to obtain information, the processor is configured to switch to the separate initial downlink BWP to receive a paging PDCCH. ### Claim 8 (depends on 1) The apparatus of claim 1, wherein to determine whether to switch to the shared initial BWP or the separate initial downlink BWP to obtain information, the processor is configured to determine whether to switch to perform measurements based on an indication of a measurement resource on one of the active downlink BWP, the separate initial downlink BWP, or the shared initial downlink BWP. ### Claim 9 (depends on 8) The apparatus of claim 8, wherein the measurement resource is one or more of a synchronization signal block (SSB), a channel state information reference signal (CSI-RS), or a positioning reference signal (PRS). ### Claim 10 (depends on 8) The apparatus of claim 8, wherein the measurements are layer 3 measurements including a reference signal received power (RSRP), a reference signal received quality (RSRQ), a signal to interference plus noise ratio (SINR), a signal to noise ratio (SNR), or a combination thereof. ### Claim 11 (depends on 8) The apparatus of claim 8, wherein the measurements include neighbor cell measurements based on system information of neighbor cells received in the configuration of the active downlink BWP for RedCap UEs. ### Claim 12 (depends on 1) The apparatus of claim 1, wherein the configuration of the active downlink BWP for RedCap UEs includes different measurement gaps to measure the CD-SSB of the shared initial downlink BWP and a non-CD-SSB of the separate initial downlink BWP. ### Claim 13 (depends on 1) The apparatus of claim 1, wherein to determine whether to switch to the shared initial BWP or the separate initial downlink BWP to obtain information, the processor is configured to determine a fallback BWP for RRC re-establishment or RRC release with redirection. ### Claim 14 A method comprising, at a reduced capability user equipment (RedCap UE): receiving a cell-defining synchronization signal block (CD-SSB) that defines a shared initial downlink bandwidth part (BWP) for RedCap UEs and non-RedCap UEs; switching to a separate initial downlink BWP for RedCap UEs; accessing a cell via the separate initial downlink BWP; receiving a configuration of an active downlink BWP for RedCap UEs; and determining whether to switch from the active downlink BWP to the shared initial BWP or the separate initial downlink BWP to obtain information. ### Claim 15 (depends on 14) The method of claim 14, wherein the configuration of the active downlink BWP for RedCap UEs includes a paging search space, and wherein determining whether to switch to the shared initial BWP or the separate initial downlink BWP to obtain the information comprises receiving a paging physical downlink control channel (PDCCH) indicating that system information has been updated. ### Claim 16 (depends on 15) The method of claim 15, wherein determining whether to switch to the shared initial BWP or the separate initial downlink BWP to obtain the information comprises switching from the active downlink BWP to the shared initial BWP or the separate initial downlink BWP to obtain updated system information. ### Claim 17 (depends on 14) The method of claim 14, wherein determining whether to switch to the shared initial BWP or the separate initial downlink BWP to obtain information comprises determining whether to switch to perform measurements based on an indication of a measurement resource on one of the active downlink BWP, the separate initial downlink BWP, or the shared initial downlink BWP. ### Claim 18 (depends on 17) The method of claim 17, wherein the measurement resource is one or more of a synchronization signal block (SSB), a channel state information reference signal (CSI-RS), or a positioning reference signal (PRS). ### Claim 19 (depends on 18) The method of claim 18, wherein the measurements are layer 3 measurements including a reference signal received power (RSRP), a reference signal received quality (RSRQ), a signal to interference plus noise ratio (SINR), a signal to noise ratio (SNR), or a combination thereof. ### Claim 20 (depends on 18) The method of claim 18, wherein the measurements include neighbor cell measurements based on system information of neighbor cells received in the configuration of the active downlink BWP for RedCap UEs. ### Claim 21 (depends on 14) The method of claim 14, wherein the configuration of the active downlink BWP for RedCap UEs includes different measurement gaps to measure the CD-SSB of the shared initial downlink BWP and a non-CD-SSB of the separate initial downlink BWP. ### Claim 22 (depends on 14) The method of claim 14, wherein determining whether to switch to the shared initial BWP or the separate initial downlink BWP to obtain information comprises determining a fallback BWP for RRC re-establishment or RRC release with redirection. ### Claim 23 An apparatus for a base station to support a reduced capability user equipment (RedCap UE), comprising: a transceiver; a memory storing computer-executable instructions; and a processor coupled with the transceiver and the memory and configured to execute the computer-executable instructions to: transmit a cell-defining synchronization signal block (CD-SSB) that defines a shared initial downlink bandwidth part (BWP) for RedCap UEs and non-RedCap UEs; transmit a non-CD-SSB for a separate initial downlink BWP for RedCap UEs; configure an active downlink BWP for the RedCap UE including a paging search space; transmit a paging physical downlink control channel (PDCCH) indicating that system information has been updated; and transmit updated system information on the shared initial downlink BWP, the separate initial downlink BWP, or the active downlink BWP as indicated by the paging PDCCH. ### Claim 24 (depends on 23) The apparatus of claim 23, wherein the processor is further configured to transmit an indication of measurement resource on one of the active downlink BWP, the separate initial downlink BWP, or the shared initial downlink BWP. ### Claim 25 (depends on 24) The apparatus of claim 24, wherein the measurement resource is one or more of a synchronization signal block (SSB), a channel state information reference signal (CSI-RS), or a positioning reference signal (PRS). ### Claim 26 (depends on 24) The apparatus of claim 24, wherein the measurements are layer 3 measurements including a reference signal received power (RSRP), a reference signal received quality (RSRQ), a signal to interference plus noise ratio (SINR), a signal to noise ratio (SNR), or a combination thereof. ### Claim 27 (depends on 23) The apparatus of claim 23, wherein the configuration of the active downlink BWP for the RedCap UE includes system information of neighbor cells to measure. ### Claim 28 (depends on 23) The apparatus of claim 23, wherein the configuration of the active downlink BWP for RedCap UEs includes different measurement gaps to measure the CD-SSB of the shared initial downlink BWP and a non-CD-SSB of the separate initial downlink BWP. ### Claim 29 (depends on 23) The apparatus of claim 23, further comprising transmitting an indication that all neighbor cells transmit system information on the separate initial BWP for RedCap UEs, which is available as a fallback BWP for RRC re-establishment or RRC release with redirection. ### Claim 30 A method of supporting a reduced capability user equipment (RedCap UE), comprising: transmitting a cell-defining synchronization signal block (CD-SSB) that defines a shared initial downlink bandwidth part (BWP) for RedCap UEs and non-RedCap UEs; transmitting a non-CD-SSB for a separate initial downlink BWP for RedCap UEs; configuring an active downlink BWP for the RedCap UE including a paging search space; transmitting a paging physical downlink control channel (PDCCH) indicating that system information has been updated; and transmitting updated system information on the shared initial downlink BWP, the separate initial downlink BWP, or the active downlink BWP as indicated by the paging PDCCH.