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WO-2026096369-A1 - MULTI-RADIO SPECTRUM SHARING CELL ACCESS BROADCAST TRANSMISSION

WO2026096369A1WO 2026096369 A1WO2026096369 A1WO 2026096369A1WO-2026096369-A1

Abstract

Procedures, methods, architectures, apparatuses, systems, devices, and computer program products related to multi-radio spectrum sharing (MRSS) cell access are described. One method may include receiving, in a cell access broadcast channel, a cell access broadcast transmission associated with a first radio access technology, determining that cell access information associated with the first radio access technology is received in the cell access broadcast transmission, determining that cell access information associated with a second radio access technology is received in the cell access broadcast channel, determining the cell access information associated with the second radio access technology based on reserved bits in the cell access broadcast channel and the cell access information associated with the first radio access technology, and receiving cell system information associated with the second radio access technology using the determined cell access information associated with the second radio access technology.

Inventors

  • DENG, TAO
  • LEE, MOON IL
  • MARINIER, PAUL
  • ALFARHAN, Faris
  • RAO, JAYA
  • SALIM, UMER

Assignees

  • INTERDIGITAL PATENT HOLDINGS, INC.

Dates

Publication Date
20260507
Application Date
20251027
Priority Date
20241104

Claims (20)

  1. 1. A wireless transmit/receive unit (WTRU), comprising: circuitry, including any of a processor, transmitter, receiver, and memory, configured to receive a cell access broadcast transmission associated with a first radio access technology, wherein the cell access broadcast transmission is received on a cell access broadcast channel; determine that cell access information associated with the first radio access technology is received in the cell access broadcast transmission; determine, based on an unused bit in the cell access broadcast channel, that cell access information associated with a second radio access technology is received in the cell access broadcast channel; determine the cell access information associated with the second radio access technology based on at least one reserved bit in the cell access broadcast channel and the cell access information associated with the first radio access technology; and receive cell system information associated with the second radio access technology using the determined cell access information associated with the second radio access technology.
  2. 2. The WTRU of claim 1, wherein the cell access broadcast transmission associated with the first radio access technology comprises a synchronization signal block (SSB).
  3. 3. The WTRU of claim 1 or 2, wherein the first radio access technology comprises a 5G radio access technology.
  4. 4. The WTRU of any of claims 1 to 3, wherein the second radio access technology comprises a 6G radio access technology.
  5. 5. The WTRU of any of claims 1 to 4, wherein the cell access broadcast channel comprises a physical broadcast channel (PBCH).
  6. 6. The WTRU of any of claims 1 to 5, wherein a value of the unused bit in the cell access broadcast channel indicates that cell access information associated with the first radio access technology and cell access information associated with the second radio access technology is included in the cell access broadcast transmission associated with the first radio access technology.
  7. 7. The WTRU of any of claims 1 to 6, configured to determine a physical cell identity associated with the first radio access technology based on the cell access broadcast transmission.
  8. 8. The WTRU of any of claims 1 to 7, wherein a value of the at least one reserved bit indicates a physical cell identity associated with the second radio access technology.
  9. 9. The WTRU of any of claims 1 to 8, wherein a value of the at least one reserved bit indicates which cell access information associated with the second radio access technology is different from the corresponding cell access information associated with the first radio access technology.
  10. 10. The WTRU of any of claims 1 to 9, wherein a value of the at least one reserved bit indicates an offset from the cell access information associated with the first radio access technology, and wherein the cell access information associated with the second radio access technology is determined based on the offset from the cell access information associated with the first radio access technology.
  11. 11. The WTRU of any of claims 1 to 10, wherein the cell access information associated with the second radio access technology is determined based on a pre-configured offset applied relative to the cell access information associated with the first radio access technology.
  12. 12. The WTRU of any of claims 1 to 11, wherein the cell system information associated with the second radio access technology comprises a system information block 1 (SIB1).
  13. 13. A method, implemented by a wireless transmit/receive unit (WTRU), the method comprising: receiving a cell access broadcast transmission associated with a first radio access technology, wherein the cell access broadcast transmission is received on a cell access broadcast channel; determining that cell access information associated with the first radio access technology is received in the cell access broadcast transmission; determining, based on an unused bit in the cell access broadcast channel, that cell access information associated with a second radio access technology is received in the cell access broadcast channel; determining the cell access information associated with the second radio access technology based on at least one reserved bit in the cell access broadcast channel and the cell access information associated with the first radio access technology; and receiving cell system information associated with the second radio access technology using the determined cell access information associated with the second radio access technology.
  14. 14. The method of claim 13, wherein the cell access broadcast transmission associated with the first radio access technology comprises a synchronization signal block (SSB).
  15. 15. The method of claim 13or 14, wherein the first radio access technology comprises a 5G radio access technology.
  16. 16. The method of any of claims 13 to 15, wherein the second radio access technology comprises a 6G radio access technology.
  17. 17. The method of any of claims 13 to 16, wherein the cell access broadcast channel comprises a physical broadcast channel (PBCH).
  18. 18. The method of any of claims 13 to 17, wherein a value of the unused bit in the cell access broadcast channel indicates that cell access information associated with the first radio access technology and cell access information associated with the second radio access technology is included in the cell access broadcast transmission associated with the first radio access technology.
  19. 19. The method of any of claims 13 to 18, comprising determining a physical cell identity associated with the first radio access technology based on the cell access broadcast transmission.
  20. 20. The method of any of claims 13 to 19, wherein a value of the at least one reserved bit indicates a physical cell identity associated with the second radio access technology.

Description

METHODS, ARCHITECTURES, APPARATUSES AND SYSTEMS FOR MULTIRADIO SPECTRUM SHARING CELL ACCESS BROADCAST TRANSMISSION CROSS-REFERENCE TO RELATED APPLICATIONS [0001] This application claims the benefit of U.S. Patent Application No. 18/936,219, filed November 4, 2024. The contents of this earlier filed application is incorporated herein by reference in its entirety. FIELD [0002] Example embodiments described in the present disclosure are generally directed to the fields of communications, software and encoding, including, for example, to methods, architectures, apparatuses, systems related to multi-radio spectrum sharing (MRSS) cell access. BACKGROUND [0003] It is expected that operators will deploy 6th generation (6G) systems in both existing and new spectrums. In the existing spectrum, 5th generation (5G) and 6G base stations (e.g., gNBs) operated by one operator may be co-located. 5G and 6G Radio Access Technology (RAT) coexistence in a shared spectrum is referred to as multi-radio spectrum sharing (MRSS) and can facilitate a gradual migration to stand-alone 6G RAT in the spectrum. SUMMARY [0004] Some embodiments may be directed to a wireless transmit/receive unit (WTRU) that includes circuitry, such as any of a processor, memory, transmitter and receiver. The circuitry may be configured to receive a cell access broadcast transmission associated with a first radio access technology, where the cell access broadcast transmission is received on a cell access broadcast channel, determine that cell access information associated with the first radio access technology is received in the cell access broadcast transmission, determine, based on an unused bit in the cell access broadcast channel, that cell access information associated with a second radio access technology is received in the cell access broadcast channel, determine the cell access information associated with the second radio access technology based on reserved bits in the cell access broadcast channel and the cell access information associated with the first radio access technology, and receive cell system information associated with the second radio access technology using the determined cell access information associated with the second radio access technology. [0005] Some embodiments may include a method implemented by a WTRU. The method may include receiving a cell access broadcast transmission associated with a first radio access technology, where the cell access broadcast transmission is received on a cell access broadcast channel, determining that cell access information associated with the first radio access technology is received in the cell access broadcast transmission, determining, based on an unused bit in the cell access broadcast channel, that cell access information associated with a second radio access technology is received in the cell access broadcast channel, determining the cell access information associated with the second radio access technology based on reserved bits in the cell access broadcast channel and the cell access information associated with the first radio access technology, and receiving cell system information associated with the second radio access technology using the determined cell access information associated with the second radio access technology. BRIEF DESCRIPTION OF THE DRAWINGS [0006] A more detailed understanding may be had from the detailed description below, given by way of example in conjunction with drawings appended hereto. Figures in such drawings, like the detailed description, are examples. As such, the Figures (FIGs.) and the detailed description are not to be considered limiting, and other equally effective examples are possible and likely. Furthermore, like reference numerals ("ref.") in the FIGs. indicate like elements, and wherein: [0007] FIG. 1 A is a system diagram illustrating an example communications system; [0008] FIG. IB is a system diagram illustrating an example wireless transmit/receive unit (WTRU) that may be used within the communications system illustrated in FIG. 1 A; [0009] FIG. 1C is a system diagram illustrating an example radio access network (RAN) and an example core network (CN) that may be used within the communications system illustrated in FIG. 1A; [0010] FIG. ID is a system diagram illustrating a further example RAN and a further example CN that may be used within the communications system illustrated in FIG. 1 A; [0011] FIG. 2 illustrates an example of overlapping coverage of 5G and 6G MRSS cells, according to an embodiment; [0012] FIG. 3 illustrates an example flow diagram of a method, according to some embodiments; and [0013] FIG. 4 illustrates an example of cell access broadcast transmissions in a 5G/6G MRSS cell, according to certain embodiments; [0014] FIG. 5 illustrates an example of WTRU reception of 6G cell access broadcast transmission based on the information indicated or included in a 5G cell access broadcast transmission, according to certain embodiments