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US-20260128849-A1 - SUB BAND FULL DUPLEX BASE STATION METHOD AND APPARATUS AND 6G USER EQUIPMENT

US20260128849A1US 20260128849 A1US20260128849 A1US 20260128849A1US-20260128849-A1

Abstract

A method performed by a subband full duplex (SBFD) compliant base station is disclosed herein. The method comprises transmitting a first indication of first SS/PBCH blocks of an SCELL of the base station and transmitting a second indication by way of a MAC CE, wherein the second indication configures second on demand SS/PBCH blocks, wherein the MAC CE specifies a number N of on-demand SSB bursts on the SCELL and an SFN offset. The method further comprises transmitting configuration information for a SRS transmission corresponding to the SCELL, wherein the configuration information for the SRS transmission includes power control settings for SBFD symbols and power control settings for non-SBFD symbols. The base station may transmit DCI on the SCELL which indicates whether the DCI corresponds to a dynamic grant or a static grant. Data is transmitted on subbands, based on the DCI, and SRS is received.

Inventors

  • Robert Olesen
  • Soheil ROSTAMI

Assignees

  • Oswego Technologies LLC

Dates

Publication Date
20260507
Application Date
20251022

Claims (20)

  1. 1 . A method performed by a subband full duplex (SBFD) compliant base station, the method comprising: transmitting a first indication of first synchronization signal/physical broadcast channel (SS/PBCH) blocks of a secondary cell (SCELL) of the base station; transmitting a second indication by way of a Medium Access Control Control Element (MAC CE), wherein the second indication configures second on demand SS/PBCH blocks, wherein the MAC CE specifies a number N of on-demand SSB bursts on the SCELL and an SFN offset; transmitting the first SS/PBCH blocks and the second on demand SS/PBCH blocks; transmitting configuration information for a sounding reference signal (SRS) transmission corresponding to the SCELL, wherein the configuration information for the SRS transmission includes power control settings for SBFD symbols; transmitting downlink control information (DCI) on the SCELL, wherein the DCI indicates whether the DCI corresponds to a dynamic grant or a static grant; transmitting data on a physical downlink shared channel (PDSCH), in one or more SBFD subbands of the SCELL, in accordance with the DCI being dynamic or static; and receiving an SRS transmission on the SCELL in accordance with the configuration information for the SRS transmission.
  2. 2 . The method of claim 1 , further comprising: transmitting second DCI, on the SCELL, wherein the second DCI allocates a resource for an uplink SBFD transmission; and receiving data in an uplink subband based on the received uplink DCI and a resource block offset (RB_offset).
  3. 3 . The method of claim 2 , wherein the uplink SBFD transmission is restricted to one or more resource block groups (RBGs).
  4. 4 . The method of claim 1 , further comprising: transmitting higher layer signaling that specifies whether resource muting applies to non-SBFD symbols in addition to SBFD symbols of the SCELL; wherein the higher layer signaling allows at least one UE to determine whether to mute one or more resources in both SBFD symbols and non-SBFD symbols the SCELL.
  5. 5 . The method of claim 1 , further comprising: transmitting configuration information comprising a plurality of RB_offsets, each corresponding to one of a plurality of symbol types, wherein the plurality of symbol types include at least an SBFD symbol type and a non-SBFD symbol type; and receiving data on an uplink data channel, on the SCELL, according to the RB_offset for each of the plurality of symbol types.
  6. 6 . The method of claim 1 , further comprising: transmitting radio resource control (RRC) information and DCI that provide information about a configured grant or a dynamic grant transmission in SBFD symbols, wherein the information includes a resource block offset; receiving an uplink shared channel transmission in accordance with the resource block offset.
  7. 7 . The method of claim 1 , further comprising: transmitting configuration information specifying a hopping sequence for physical uplink control channel (PUCCH) transmissions in sub band full duplex symbols; receiving, based on the configuration information, in a first even numbered slot, a first PUCCH transmission on a first frequency; receiving, based on the configuration information, in a second odd numbered slot, a second PUCCH transmission on a second frequency; wherein the first frequency is different from the second frequency.
  8. 8 . A base station comprising: a transmitter configured to transmit first synchronization signal/physical broadcast channel (SS/PBCH) blocks of a secondary cell (SCELL) of the base station; the transmitter configured to transmit a Medium Access Control Control Element (MAC CE), wherein the MAC CE configures second on demand SS/PBCH blocks and specifies a number N of on-demand SSB bursts on the SCELL and an SFN offset; the transmitter configured to transmit the second on demand SS/PBCH blocks; the transmitter configured to transmit configuration information for a sounding reference signal (SRS) transmission corresponding to the SCELL including power control settings for SBFD symbols; the transmitter configured to transmit downlink control information (DCI) on the SCELL, wherein the DCI indicates whether the DCI corresponds to a dynamic grant or a static grant; the transmitter configured to transmit data on a physical downlink shared channel (PDSCH), in one or more SBFD subbands of the SCELL, in accordance with the DCI indicating a dynamic or static grant; and a receiver configured to receive an SRS transmission on the SCELL in accordance with the configuration information for the SRS transmission.
  9. 9 . (canceled)
  10. 10 . The base station of claim 8 , further comprising: the transmitter configured to transmit higher layer signaling that specifies whether resource muting applies to non-SBFD symbols in addition to SBFD symbols of the SCELL; wherein the higher layer signaling allows at least one UE to determine whether to mute one or more resources in both SBFD symbols and non-SBFD symbols the SCELL.
  11. 11 . The base station of claim 8 , wherein: the transmitter is configured to transmit information indicating that a time/frequency resource configured for SBFD is to be alternatively used for downlink; the transmitter is configured to transmit a downlink signal on the time/frequency resource.
  12. 12 . The base station of claim 8 , further comprising: circuitry configured to allocate a first time interval for SBFD and to process uplink and downlink transmissions during the first time interval; the transmitter configured to transmit downlink control information or a media access control control element (MAC CE) that indicates, for a second time interval, that an uplink subband width is different from that of an uplink subband width employed during the first time interval; wherein the first time interval and the second time interval are different time intervals.
  13. 13 . The base station of claim 8 , further comprising: circuitry configured to allocate a first time interval for SBFD and to process uplink and downlink transmissions during the first time interval; the transmitter configured to transmit downlink control information or a media access control control element (MAC CE) that indicates, for a second time interval, that an uplink or downlink subband position is different from that of an uplink or downlink subband position of the first time interval; wherein the first time interval and the second time interval are different time intervals.
  14. 14 . The base station of claim 8 , further comprising: circuitry configured to split a time division duplex (TDD) subband into a plurality of subbands including at least a first subband and a second subband, wherein the first subband has a first time duplex configuration and the second subband has a second time duplex configuration, wherein the first time duplex configuration and the second time duplex configuration are different; the transmitter configured to transmit an indication of the first time duplex configuration and the second time duplex configuration.
  15. 15 . A method performed by a sixth-generation (6G) user equipment (UE) in communication with at least one sub band full duplex (SBFD) compliant base station (BS), the method comprising: receiving one or more first synchronization signal/physical broadcast channel (SS/PBCH) blocks; receiving a Medium Access Control Control Element (MAC CE) which specifies a number N of on-demand SSB bursts of a secondary cell (SCELL) and an SFN offset; receiving one or more on demand SS/PBCH blocks on the SCELL in accordance with the MAC CE; receiving downlink control information (DCI) on the SCELL; transmitting data on a physical uplink shared channel (PUSCH), in an uplink subband of the SCELL, in accordance with the DCI, wherein the uplink subband has a first width; transmitting a sounding reference signal (SRS) on the SCELL in accordance with SBFD configuration information received by the UE; receiving configuration information indicating a second uplink subband width, wherein the second uplink subband width is different than the first uplink width; transmitting data in accordance with the second uplink subband width in response to receiving another DCI.
  16. 16 . The method of claim 15 , further comprising: receiving information indicating that a time/frequency resource configured for SBFD is to be alternatively used for downlink; receiving a downlink signal on the time/frequency resource.
  17. 17 . The method of claim 15 , wherein the configuration information indicating the second uplink subband width is received via downlink control information.
  18. 18 . The method of claim 15 , further comprising: receiving information allocating a first time interval for SBFD and processing uplink and downlink transmissions during the first time interval; receiving information indicating that an uplink or downlink subband position of a second time interval is different from that of an uplink or downlink subband position of the first time interval; wherein the first time interval and the second time interval are different time intervals.
  19. 19 . The method of claim 15 , wherein: a time division duplex (TDD) subband is split into a plurality of subbands including at least a first subband and a second subband, wherein the first subband has a first time duplex configuration and the second subband has a second time duplex configuration, wherein the first time duplex configuration and the second time duplex configuration are different.
  20. 20 . The method of claim 1 , wherein the DCI corresponds to a dynamic grant.

Description

CROSS REFERENCE TO RELATED APPLICATIONS This application claims priority from U.S. Provisional Patent Application No. 63/715,477, filed on Nov. 1, 2024, from U.S. Provisional Patent Application No. 63/719,573, filed on Nov. 12, 2024, from U.S. Provisional Patent Application No. 63/726,980, filed on Dec. 2, 2024, from U.S. Provisional Patent Application No. 63/737,149, filed on Dec. 20, 2024, from U.S. Provisional Patent Application No. 63/753,873, filed on Feb. 4, 2025 and from U.S. Provisional Patent Application No. 63/775,962, filed on Mar. 21, 2025, which are incorporated by reference as if fully set forth herein. BACKGROUND A communications system may be a multiple access system that provides content, such as voice, data, video, messaging, broadcast, etc., to multiple wireless users. The communications system may enable multiple wireless users to access such content through the sharing of system resources, including wireless bandwidth. For example, the communications systems may employ one or more channel access methods, such as code division multiple access (CDMA), time division multiple access (TDMA), frequency division multiple access (FDMA), orthogonal FDMA (OFDMA), single-carrier FDMA (SC-FDMA), zero-tail unique-word DFT-Spread OFDM (ZT UW DTS-s OFDM), unique word OFDM (UW-OFDM), resource block-filtered OFDM, filter bank multicarrier (FBMC), and the like. A communications system may include user equipment devices, which may be referred to herein as a wireless transmit/receive units (WTRUs). The communications system may also comprise a core network and other networks. In some examples, WTRUs may be referred to as a “station” and/or a “STA”, may be configured to transmit and/or receive wireless signals and may include a user equipment (UE), a mobile station, a fixed or mobile subscriber unit, a subscription-based unit, a pager, a cellular telephone, a personal digital assistant (PDA), a smartphone, a laptop, a netbook, a personal computer, a wireless sensor, a hotspot or Mi-Fi device, an Internet of Things (IoT) device, a watch or other wearable, a head-mounted display (HMD), a vehicle, a drone, a medical device and applications (e.g., remote surgery), an industrial device and applications (e.g., a robot and/or other wireless devices operating in an industrial and/or an automated processing chain contexts), a consumer electronics device, a device operating on commercial and/or industrial wireless networks, and the like. The communications systems 100 may also include a base station which may be any type of device configured to wirelessly interface with at least one of the WTRUs to facilitate access to one or more communication networks, such as the CN, the Internet, and/or the other networks. By way of example, each base stations may be a base transceiver station (BTS), a Node-B, an eNode B, a Home Node B, a Home eNode B, a gNB, a NR NodeB, a gNB, a 6GR node B, a site controller, an access point (AP), a wireless router, and the like. While the base stations described herein are each depicted as a single element, it will be appreciated that the base stations may include any number of interconnected base stations and/or network elements. Base stations may comprise communication circuitry including a processor, transceiver (transmitter/receiver) and an antenna. A WTRU may include a processor, a transceiver, a transmit/receive element, a speaker/microphone, a keypad, a display/touchpad, non-removable memory, removable memory, a power source, a global positioning system (GPS) chipset and/or other peripherals. The processor may be a general purpose processor, a special purpose processor, a conventional processor, a digital signal processor (DSP), a plurality of microprocessors, one or more microprocessors in association with a DSP core, a controller, a microcontroller, Application Specific Integrated Circuits (ASICs), Field Programmable Gate Arrays (FPGAs) circuits, any other type of integrated circuit (IC), a state machine, and the like. The processor may perform signal coding, data processing, power control, input/output processing, and/or any other functionality that enables the WTRU to operate in a wireless environment. The processor may be coupled to the transceiver, which may be coupled to the transmit/receive element. Subband full duplex (SBFD) is a wireless communication technique that allows simultaneous transmission and reception of signals within the same overall frequency band, but using different sub-bands. For instance, a base station may operate in a full duplex mode by simultaneously transmitting and receiving in the different sub-bands. UEs or WTRUs may perform half duplex operation by either receiving or transmitting at a particular instant or the WTRU may perform full duplex operation by receiving and transmitting at a same time. SBFD has a capability to increase throughput and the uplink coverage, reduce transmission latency and support traffic with different requirements in the same c