Search

US-12621870-B2 - Default system information configuration for different network types

US12621870B2US 12621870 B2US12621870 B2US 12621870B2US-12621870-B2

Abstract

Certain aspects of the present disclosure provide techniques for configuring default system information for different network types. An example method, performed by a user equipment (UE), may include obtaining information indicating which set of default parameters, from two or more different sets of default parameters associated with different network types, to use for performing a random access channel (RACH) procedure and performing the RACH procedure with a network entity using the indicated set of default parameters.

Inventors

  • Mahmoud Taherzadeh Boroujeni
  • Peter Gaal
  • Tao Luo

Assignees

  • QUALCOMM INCORPORATED

Dates

Publication Date
20260505
Application Date
20230809

Claims (20)

  1. 1 . A method for wireless communication by a user equipment (UE), comprising: obtaining information indicating which set of default parameters, from two or more different sets of default parameters associated with different network types, to use for performing a random access channel (RACH) procedure; obtaining the indicated set of default parameters based on the information, wherein the indicated set of default parameters are obtained from one or more memories of the UE and not from system information received from a network entity; and performing the RACH procedure with the network entity using the indicated set of default parameters for supporting configuration of PRACH repetition or MSG3 repetition in the different network types.
  2. 2 . The method of claim 1 , wherein the indicated set of default parameters comprises a first set of default parameters for performing the RACH procedure associated with a first network type, and wherein the first set of default parameters is different from a second set of default parameters for performing the RACH procedure associated with a second network type.
  3. 3 . The method of claim 2 , wherein the first set of default parameters for performing the RACH procedure associated with the first network type includes at least one of: a first set of numbers of repetitions for a first message (MSG1) of the RACH procedure; an indication of a procedure for repetition of the MSG1 of the RACH procedure after one or more failed RACH attempts; a number of retransmissions for the MSG1 of the RACH procedure after one or more failed RACH attempts; or one or more criteria for triggering repetitions for the MSG1 of the RACH procedure.
  4. 4 . The method of claim 2 , wherein: the first network type comprises a non-terrestrial network (NTN); and the second network type comprises a terrestrial network.
  5. 5 . The method of claim 2 , wherein: the first network type comprises a geostationary (GEO) non-terrestrial network (NTN); and the second network type comprises a low-earth orbit (LEO) NTN.
  6. 6 . The method of claim 2 , wherein: the first network type comprises an extra-long-range terrestrial network; and the second network type comprises a non-extra-long-range terrestrial network.
  7. 7 . The method of claim 2 , wherein the first set of default parameters for performing the RACH procedure associated with the first network type further includes at least one of: a second set of numbers of repetitions for a third message (MSG3) of the RACH procedure; one or more criteria for requesting repetitions for the MSG3 of the RACH procedure; or an indication of a procedure for requesting repetition of the MSG3 of the RACH procedure.
  8. 8 . The method of claim 1 , wherein the information comprises an indication of a network type associated with the network entity.
  9. 9 . The method of claim 1 , wherein the information comprises a synchronization signal block (SSB) for which the RACH procedure is to be performed.
  10. 10 . The method of claim 9 , wherein when synchronization signal reference signal receive power (SS-RSRP) associated with the SSB is below a particular threshold, repetitions for a MSG1) are triggered.
  11. 11 . The method of claim 1 , wherein the information comprises a one-bit flag in a first system information block (SIB1) or a master information block (MIB).
  12. 12 . The method of claim 1 , wherein the information comprises at least one of a frequency range associated with communication with the network entity or a frequency band associated with communication with the network entity.
  13. 13 . The method of claim 1 , wherein the information further indicates whether to interpret one or more bit fields in a first system information block (SIB1) as being associated with a first network type or being associated with a second network type.
  14. 14 . The method of claim 1 , wherein the indicated set of default parameters are pre-configured.
  15. 15 . The method of claim 1 , wherein performing the RACH procedure comprises at least one of: performing a first number of repetitions of a MSG1) based on the indicated set of default parameters; or performing a second number of repetitions of a third message (MSG3) based on the indicated set of default parameters.
  16. 16 . A method for wireless communication by a network entity, comprising: providing information indicating which set of default parameters, from two or more different sets of default parameters associated with different network types, for a user equipment (UE) to use for performing a random access channel (RACH) procedure, wherein the indicated set of default parameters are not provided in system information transmitted by the network entity; and performing the RACH procedure with the UE based on the indicated set of default parameters for supporting configuration of PRACH repetition or MSG3 repetition in the different network types.
  17. 17 . The method of claim 16 , wherein the indicated set of default parameters comprises a first set of default parameters for performing the RACH procedure associated with a first network type, and wherein the first set of default parameters is different from a second set of default parameters for performing the RACH procedure associated with a second network type.
  18. 18 . The method of claim 17 , wherein the first set of default parameters for performing the RACH procedure associated with the first network type includes at least one of: a first set of numbers of repetitions for a MSG1) of the RACH procedure; an indication of a procedure for repetition of the MSG1 of the RACH procedure after one or more failed RACH attempts; a number of retransmissions for the MSG1 of the RACH procedure after one or more failed RACH attempts; or one or more criteria for triggering repetitions for the MSG1 of the RACH procedure.
  19. 19 . The method of claim 17 , wherein: the first network type comprises a non-terrestrial network (NTN); and the second network type comprises a terrestrial network.
  20. 20 . The method of claim 17 , wherein: the first network type comprises a geostationary (GEO) non-terrestrial network (NTN); and the second network type comprises a low-earth orbit (LEO) NTN.

Description

BACKGROUND Field of the Disclosure Aspects of the present disclosure relate to wireless communications, and more particularly, to techniques for configuring default system information for different network types. Description of Related Art Wireless communications systems are widely deployed to provide various telecommunication services such as telephony, video, data, messaging, broadcasts, or other similar types of services. These wireless communications systems may employ multiple-access technologies capable of supporting communications with multiple users by sharing available wireless communications system resources with those users. Although wireless communications systems have made great technological advancements over many years, challenges still exist. For example, complex and dynamic environments can still attenuate or block signals between wireless transmitters and wireless receivers. Accordingly, there is a continuous desire to improve the technical performance of wireless communications systems, including, for example: improving speed and data carrying capacity of communications, improving efficiency of the use of shared communications mediums, reducing power used by transmitters and receivers while performing communications, improving reliability of wireless communications, avoiding redundant transmissions and/or receptions and related processing, improving the coverage area of wireless communications, increasing the number and types of devices that can access wireless communications systems, increasing the ability for different types of devices to intercommunicate, increasing the number and type of wireless communications mediums available for use, and the like. Consequently, there exists a need for further improvements in wireless communications systems to overcome the aforementioned technical challenges and others. SUMMARY One aspect provides a method for wireless communication by a user equipment (UE). The method includes obtaining information indicating which set of default parameters, from two or more different sets of default parameters associated with different network types, to use for performing a random access channel (RACH) procedure; and performing the RACH procedure with a network entity using the indicated set of default parameters. Another aspect provides a method for wireless communication by a network entity. The method includes providing information indicating which set of default parameters, from two or more different sets of default parameters associated with different network types, for a user equipment (UE) to use for performing a random access channel (RACH) procedure; and performing the RACH procedure with the UE based on the indicated set of default parameters. Other aspects provide: an apparatus operable, configured, or otherwise adapted to perform any one or more of the aforementioned methods and/or those described elsewhere herein; a non-transitory, computer-readable media comprising instructions that, when executed by one or more processors of an apparatus, cause the apparatus to perform the aforementioned methods as well as those described elsewhere herein; a computer program product embodied on a computer-readable storage medium comprising code for performing the aforementioned methods as well as those described elsewhere herein; and/or an apparatus comprising means for performing the aforementioned methods as well as those described elsewhere herein. By way of example, an apparatus may comprise a processing system, a device with a processing system, or processing systems cooperating over one or more networks. The following description and the appended figures set forth certain features for purposes of illustration. BRIEF DESCRIPTION OF DRAWINGS The appended figures depict certain features of the various aspects described herein and are not to be considered limiting of the scope of this disclosure. FIG. 1 depicts an example wireless communications network. FIG. 2 depicts an example disaggregated base station architecture. FIG. 3 depicts aspects of an example base station and an example user equipment. FIGS. 4A, 4B, 4C, and 4D depict various example aspects of data structures for a wireless communications network. FIG. 5 depicts process flow diagram illustrating an example four-step random access channel procedure. FIG. 6 depicts process flow diagram illustrating an example two-step random access channel procedure. FIG. 7 depicts a process flow for communications in a network between a network entity and a user equipment. FIG. 8 depicts a method for wireless communications. FIG. 9 depicts a method for wireless communications. FIG. 10 depicts aspects of an example communications device. FIG. 11 depicts aspects of an example communications device. DETAILED DESCRIPTION Aspects of the present disclosure provide apparatuses, methods, processing systems, and computer-readable mediums for configuring default system information for different network types. For example, when