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US-20260129687-A1 - TIMING ADVANCE PRE-COMPENSATION FOR A RANDOM ACCESS PROCEDURE

US20260129687A1US 20260129687 A1US20260129687 A1US 20260129687A1US-20260129687-A1

Abstract

Example embodiments of the present disclosure are directed to timing advance (TA) pre-compensation in a random access procedure. A method comprises obtaining configuration information associated with at least a timing advance (TA) pre-compensation capability; determining whether a difference between a current location of the first apparatus with its previous location is below a threshold based on the configuration information; and transmitting, to a second apparatus, a message comprising a random access preamble and uplink data using a timing advance (TA) value of the previous location in response to the difference is below the threshold.

Inventors

  • Smita SHETTY
  • Sami-Jukka Hakola

Assignees

  • NOKIA TECHNOLOGIES OY

Dates

Publication Date
20260507
Application Date
20251031
Priority Date
20241101

Claims (20)

  1. 1 . A first apparatus comprising: at least one processor; and at least one memory storing instructions that, when executed by the at least one processor, cause the first apparatus at least to: obtain configuration information associated with at least a timing advance (TA) pre-compensation capability; determine whether a difference between a current location of the first apparatus with its previous location is below a threshold based on the configuration information; and transmit, to a second apparatus, a message comprising a random access preamble and uplink data using a TA value of the previous location in response to the difference is below the threshold.
  2. 2 . The first apparatus of claim 1 , wherein first apparatus is caused to: transmit the message comprising the random access preamble and the uplink data using the beam used by the first apparatus in its previous location.
  3. 3 . The first apparatus of claim 1 , wherein the threshold is a maximum distance of a location change of the first apparatus below which the TA value needs not adjusting.
  4. 4 . The first apparatus of claim 1 , wherein the configuration information comprises at least one of the following: capability information indicative of a capability of the apparatus to support TA pre-compensation; random access configuration information at least comprising 2-step RA and 4-step RA; a reference signal received power (RSRP) threshold value; information enabling the first apparatus to determine the transmission TA; or condition information associated with RA selection.
  5. 5 . The first apparatus of claim 1 , wherein the configuration information is received as part of a system information block, or broadcasting signals
  6. 6 . The first apparatus of claim 4 , wherein the information enabling the first apparatus to determine the transmission TA comprises parameter information for the first apparatus to compute a propagation delay between the first apparatus and the second apparatus.
  7. 7 . The first apparatus of claim 4 , wherein the parameter information comprises at least one of the following: positioning information of the second apparatus; TA values at different distances; TA values associated with different reference signal received power (RSRP) ranges; or timing synchronization information.
  8. 8 . The first apparatus of claim 4 , wherein the condition information associated with RA selection comprises an indication indicating the RSRP threshold is able to be ignored if the TA pre-compensation capability is supported by the first apparatus, and the transmission of the message comprising the random access preamble and the uplink data is further in response to receiving the indication.
  9. 9 . The first apparatus of claim 7 , wherein whether the difference between the current location of the first apparatus with its previous location is below the threshold is determined based on the positioning information of the second apparatus; and it is determined that the difference is below the threshold in response to the current location is within the distance of the threshold of its previous location.
  10. 10 . The first apparatus of claim 9 , wherein the distance of the threshold is the granularity of the TA adjustment.
  11. 11 . The first apparatus of claim 7 , wherein whether the difference between the current location of the first apparatus with its previous location is below the threshold is determined based on the TA value at the current location and the TA value at its previous location; and it is determined that the difference is below the threshold in response to the TA value at the current location is the same as the TA value at its previous location.
  12. 12 . The first apparatus of claim 7 , wherein whether the difference between the current location of the first apparatus with its previous location is below the threshold is determined based on the TA values associated with different RSRP ranges; and it is determined that the difference is below the threshold in response to TA value at the RSRP level at the current location is the same as the RSRP level at its previous location.
  13. 13 . The first apparatus of claim 1 , wherein the TA value of the previous location is obtained from the second apparatus while the first apparatus was in CONNECTED mode.
  14. 14 . The first apparatus of claim 1 , wherein the first apparatus is in an IDLE mode or INACTIVE mode.
  15. 15 . (canceled)
  16. 15 . (canceled)
  17. 16 . (canceled)
  18. 17 . A computer readable medium that is non-transitory and comprises instructions stored thereon for causing an apparatus at least to: obtaining configuration information associated with at least a timing advance (TA) pre-compensation capability; determining whether a difference between a current location of the first apparatus with its previous location is below a threshold based on the configuration information; and transmitting, to a second apparatus, a message comprising a random access preamble and uplink data using a timing advance (TA) value of the previous location in response to the difference is below the threshold.
  19. 18 . (canceled)
  20. 19 . The first apparatus of claim 1 , wherein the first apparatus is or is comprised in a terminal device, and wherein the second apparatus is or is comprised in a network device.

Description

FIELD Various example embodiments of the present disclosure generally relate to the field of telecommunication and in particular, to methods, devices, apparatuses and computer readable storage medium for timing advance (TA) pre-compensation for a random access procedure. BACKGROUND 5G NR (New Radio) is the next-generation radio access technology developed by the 3rd Generation Partnership Project (3GPP) for the 5G mobile network. It is designed to be the global standard for the air interface of 5G networks, offering lower latency, higher system capacity, and massive device connectivity. Random Access (RA) in 5G NR (New Radio) is a fundamental procedure that enables user equipment (UE) to establish a connection with the network. It is used for various purposes, including initial network access, mobility, and handover. The RA process ensures that UEs can communicate with the base station (gNB) efficiently and reliably, facilitating seamless connectivity and optimal network performance. Looking ahead to 6G, RA technology is expected to evolve to support even more advanced use cases and massive connectivity requirements. SUMMARY In a first aspect of the present disclosure, there is provided a first apparatus. The first apparatus comprises at least one processor; and at least one memory storing instructions that, when executed by the at least one processor, cause the first apparatus at least to: obtain configuration information associated with at least a timing advance (TA) pre-compensation capability; determine a transmission TA in response to determining that a TA pre-compensation capability is supported by the first apparatus based at least on the configuration information, select a random-access (RA) procedure for transmission in response to determining that at least one condition is met; and transmit, to a second apparatus, a message comprising a random access preamble and uplink data using the determined transmission TA and selected random-access procedure. In a second aspect of the present disclosure, there is provided a second apparatus. The second apparatus comprises at least one processor; and at least one memory storing instructions that, when executed by the at least one processor, cause the first apparatus at least to: transmit, to a first apparatus, configuration information associated with at least a timing advance (TA) pre-compensation capability; and receive, from the first apparatus, a message comprising a random access preamble and uplink data transmitted using a transmission TA determined in response to determining that a TA pre-compensation capability is supported by the first apparatus based at least on the configuration information. In a third aspect of the present disclosure, there is provided a first apparatus. The third apparatus comprises at least one processor; and at least one memory storing instructions that, when executed by the at least one processor, cause the first apparatus at least to: obtain configuration information associated with at least a timing advance (TA) pre-compensation capability; determine whether a difference between a current location of the first apparatus with its previous location is below a threshold based on the configuration information; and transmit, to a second apparatus, a message comprising a random access preamble and uplink data using a TA value of the previous location in response to the difference is below the threshold. In a fourth aspect of the present disclosure, there is provided a method. The method comprises: obtaining configuration information associated with at least a timing advance (TA) pre-compensation capability; determining a transmission TA in response to determining that a TA pre-compensation capability is supported by the first apparatus based at least on the configuration information; selecting a random-access (RA) procedure for transmission in response to determining that at least one condition is met; and transmitting, to a second apparatus, a message comprising a random access preamble and uplink data using the determined transmission TA and selected random-access procedure. In a fifth aspect of the present disclosure, there is provided a method. The method comprises: transmitting, to a first apparatus, configuration information associated with at least a timing advance (TA) pre-compensation capability; and receiving, from the first apparatus, a message comprising a random access preamble and uplink data transmitted using a transmission TA determined in response to determining that a TA pre-compensation capability is supported by the first apparatus based at least on the configuration information. In a sixth aspect of the present disclosure, there is provided a method. The method comprises: obtaining configuration information associated with at least a timing advance (TA) pre-compensation capability; determining whether a difference between a current location of the first apparatus with its previous location is below a threshold