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WO2025065350A1 - Ajustement d'avance temporelle - Google Patents

Ajustement d'avance temporelle Download PDF

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Publication number
WO2025065350A1
WO2025065350A1 PCT/CN2023/122081 CN2023122081W WO2025065350A1 WO 2025065350 A1 WO2025065350 A1 WO 2025065350A1 CN 2023122081 W CN2023122081 W CN 2023122081W WO 2025065350 A1 WO2025065350 A1 WO 2025065350A1
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WO
WIPO (PCT)
Prior art keywords
configuration
adjustment
terminal device
srs
threshold
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Pending
Application number
PCT/CN2023/122081
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English (en)
Inventor
Gilsoo LEE
Hyun-Su Cha
Tao Tao
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Nokia Shanghai Bell Co Ltd
Nokia Solutions and Networks Oy
Nokia Technologies Oy
Original Assignee
Nokia Shanghai Bell Co Ltd
Nokia Solutions and Networks Oy
Nokia Technologies Oy
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Nokia Shanghai Bell Co Ltd, Nokia Solutions and Networks Oy, Nokia Technologies Oy filed Critical Nokia Shanghai Bell Co Ltd
Priority to PCT/CN2023/122081 priority Critical patent/WO2025065350A1/fr
Publication of WO2025065350A1 publication Critical patent/WO2025065350A1/fr
Pending legal-status Critical Current
Anticipated expiration legal-status Critical

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Classifications

    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W56/00—Synchronisation arrangements
    • H04W56/004—Synchronisation arrangements compensating for timing error of reception due to propagation delay
    • H04W56/0045—Synchronisation arrangements compensating for timing error of reception due to propagation delay compensating for timing error by altering transmission time

Definitions

  • Various example embodiments generally relate to the field of communication, and in particular, to a terminal device, a network device, methods, apparatuses and a computer readable storage medium related to a timing advance (TA) adjustment.
  • TA timing advance
  • radio access network (RAN) 1 made some agreement at RAN1 #113 meeting. Based on the agreement, a UE may be able to perform autonomous TA adjustment when cell-reselection happens as a downlink (DL) reception (Rx) reference timing would be changed according to the serving cell change. It is to be noted that the network would be able to know a TA as the network indicated, but it does not mean the network can track the UE transmission timing change for uplink.
  • example embodiments of the present disclosure provide a solution for a TA adjustment, especially for triggering an autonomous TA adjustment in a sounding reference signal (SRS) validity area.
  • the solution provided by the example embodiments of the present disclosure can trigger an autonomous TA adjustment based on clear conditions, and thus can improve the TA adjustment effect and the efficiency of the TA adjustment.
  • SRS sounding reference signal
  • a terminal device may comprise at least one processor and at least one memory storing instructions that, when executed by the at least one processor, cause the terminal device at least to: receive, from a network device, a first configuration which is used at least for configuring a sounding reference signal (SRS) valid for a plurality of cells; receive, from the network device, a second configuration for (i) a timing advance (TA) adjustment for a SRS transmission, and (ii) an update of downlink (DL) reception reference timing, wherein the second configuration comprises at least a first threshold and a second threshold for determining whether to perform at least one of the TA adjustment or the update of the DL reception reference timing; and transmit, to the network device, the SRS based on the first configuration and the second configuration.
  • the description on the behavior of the terminal device is especially for the terminal device in a radio resource control (RRC) _INACTIVE state.
  • RRC radio resource control
  • the network device may comprise at least one processor and at least one memory storing instructions that, when executed by the at least one processor, cause the network device at least to: transmit, to a terminal device, a first configuration which is used at least for configuring a sounding reference signal (SRS) valid for a plurality of cells; transmit, to the terminal device, a second configuration for (i) a timing advance (TA) adjustment for a SRS transmission, and (ii) an update of downlink (DL) reception reference timing, wherein the second configuration comprises at least a first threshold and a second threshold for determining whether to perform at least one of the TA adjustment or the update of the DL reception reference timing; and receive, from the terminal device, the SRS based on the first configuration and the second configuration, or uplink positioning measurement which is made based on the SRS.
  • SRS sounding reference signal
  • a method may comprise: receiving, at a terminal device from a network device, a first configuration which is used at least for configuring a sounding reference signal (SRS) valid for a plurality of cells; receiving, from the network device, a second configuration for (i) a timing advance (TA) adjustment for a SRS transmission, and (ii) an update of downlink (DL) reception reference timing, wherein the second configuration comprises at least a first threshold and a second threshold for determining whether to perform at least one of the TA adjustment or the update of the DL reception reference timing; and transmitting, to the network device, the SRS based on the first configuration and the second configuration.
  • SRS sounding reference signal
  • a method may comprise: transmitting, at a network device to a terminal device, a first configuration which is used at least for configuring a sounding reference signal (SRS) valid for a plurality of cells; transmitting, to the terminal device, a second configuration for (i) a timing advance (TA) adjustment for a SRS transmission, and (ii) an update of downlink (DL) reception reference timing, wherein the second configuration comprises at least a first threshold and a second threshold for determining whether to perform at least one of the TA adjustment or the update of the DL reception reference timing; and receiving, from the terminal device, the SRS based on the first configuration and the second configuration, or uplink positioning measurement which is made based on the SRS.
  • SRS sounding reference signal
  • an apparatus may comprise: means for receiving, at a terminal device from a network device, a first configuration which is used at least for configuring a sounding reference signal (SRS) valid for a plurality of cells; means for receiving, from the network device, a second configuration for (i) a timing advance (TA) adjustment for a SRS transmission, and (ii) an update of downlink (DL) reception reference timing, wherein the second configuration comprises at least a first threshold and a second threshold for determining whether to perform at least one of the TA adjustment or the update of the DL reception reference timing; and means for transmitting, to the network device, the SRS based on the first configuration and the second configuration.
  • SRS sounding reference signal
  • an apparatus may comprise: means for transmitting, at a network device to a terminal device, a first configuration which is used at least for configuring a sounding reference signal (SRS) valid for a plurality of cells; means for transmitting, to the terminal device, a second configuration for (i) a timing advance (TA) adjustment for a SRS transmission, and (ii) an update of downlink (DL) reception reference timing, wherein the second configuration comprises at least a first threshold and a second threshold for determining whether to perform at least one of the TA adjustment or the update of the DL reception reference timing; and means for receiving, from the terminal device, the SRS based on the first configuration and the second configuration, or uplink positioning measurement which is made based on the SRS.
  • SRS sounding reference signal
  • a non-transitory computer readable medium comprising program instructions for causing an apparatus to perform at least the method according to the third or fourth aspect.
  • a computer program comprising instructions, which, when executed by an apparatus, cause the apparatus at least to: receive, from a network device, a first configuration which is used at least for configuring a sounding reference signal (SRS) valid for a plurality of cells; receive, from the network device, a second configuration for (i) a timing advance (TA) adjustment for a SRS transmission, and (ii) an update of downlink (DL) reception reference timing, wherein the second configuration comprises at least a first threshold and a second threshold for determining whether to perform at least one of the TA adjustment or the update of the DL reception reference timing; and transmit, to the network device, the SRS based on the first configuration and the second configuration.
  • SRS sounding reference signal
  • a computer program comprising instructions, which, when executed by an apparatus, cause the apparatus at least to: transmit, to a terminal device, a first configuration which is used at least for configuring a sounding reference signal (SRS) valid for a plurality of cells; transmit, to the terminal device, a second configuration for (i) a timing advance (TA) adjustment for a SRS transmission, and (ii) an update of downlink (DL) reception reference timing, wherein the second configuration comprises at least a first threshold and a second threshold for determining whether to perform at least one of the TA adjustment or the update of the DL reception reference timing; and receive, from the terminal device, the SRS based on the first configuration and the second configuration, or uplink positioning measurement which is made based on the SRS.
  • SRS sounding reference signal
  • the terminal device may comprise a first receiving circuitry configured to receive, from a network device, a first configuration which is used at least for configuring a sounding reference signal (SRS) valid for a plurality of cells; a second receiving circuitry configured to receive, from the network device, a second configuration for (i) a timing advance (TA) adjustment for a SRS transmission, and (ii) an update of downlink (DL) reception reference timing, wherein the second configuration comprises at least a first threshold and a second threshold for determining whether to perform at least one of the TA adjustment or the update of the DL reception reference timing; and a transmitting circuitry configured to transmit, to the network device, the SRS based on the first configuration and the second configuration.
  • SRS sounding reference signal
  • the network device may comprise a first transmitting circuitry configured to transmit, to a terminal device, a first configuration which is used at least for configuring a sounding reference signal (SRS) valid for a plurality of cells; a second transmitting circuitry configured to transmit, to the terminal device, a second configuration for (i) a timing advance (TA) adjustment for a SRS transmission, and (ii) an update of downlink (DL) reception reference timing, wherein the second configuration comprises at least a first threshold and a second threshold for determining whether to perform at least one of the TA adjustment or the update of the DL reception reference timing; and a receiving circuitry configured to receive, from the terminal device, the SRS based on the first configuration and the second configuration, or uplink positioning measurement which is made based on the SRS.
  • SRS sounding reference signal
  • FIG. 1 illustrates an example network environment in which example embodiments of the present disclosure may be implemented
  • FIG. 2 illustrates an example signaling process of a TA adjustment in accordance with some example embodiments of the present disclosure
  • FIG. 3 illustrates another example signaling process of an update downlink reception reference timing and a TA adjustment in accordance with some example embodiments of the present disclosure
  • FIG. 4 illustrates yet another example signaling process of an update downlink reception reference timing and a TA adjustment in accordance with some example embodiments of the present disclosure
  • FIG. 5 illustrates an example of a use case of the first threshold in accordance with some example embodiments of the present disclosure
  • FIG. 6 illustrates an example of a use case of the second threshold in accordance with some example embodiments of the present disclosure
  • FIG. 7 illustrates an example TA adjustment for transmit timing in accordance with some example embodiments of the present disclosure
  • FIG. 8 illustrates an example flowchart of a process of a TA adjustment in accordance with some example embodiments of the present disclosure
  • FIG. 9 illustrates another example flowchart of a process of a TA adjustment in accordance with some example embodiments of the present disclosure.
  • FIG. 10 illustrates an example simplified block diagram of a device that is suitable for implementing embodiments of the present disclosure.
  • FIG. 11 illustrates an example block diagram of an example computer readable medium in accordance with some example embodiments of the present disclosure.
  • references in the present disclosure to “one embodiment, ” “an embodiment, ” “an example embodiment, ” and the like indicate that the embodiment described may include a particular feature, structure, or characteristic, but it is not necessary that every embodiment includes the particular feature, structure, or characteristic. Moreover, such phrases are not necessarily referring to the same embodiment. Further, when a particular feature, structure, or characteristic is described in connection with an embodiment, it is submitted that it is within the knowledge of one skilled in the art to affect such feature, structure, or characteristic in connection with other embodiments whether or not explicitly described.
  • first and second etc. may be used herein to describe various elements, these elements should not be limited by these terms. These terms are only used to distinguish one element from another. For example, a first element could be termed a second element, and similarly, a second element could be termed a first element, without departing from the scope of example embodiments.
  • the term “and/or” includes any and all combinations of one or more of the listed terms.
  • circuitry may refer to one or more or all of the following:
  • circuitry also covers an implementation of merely a hardware circuit or processor (or multiple processors) or portion of a hardware circuit or processor and its (or their) accompanying software and/or firmware.
  • circuitry also covers, for example and if applicable to the particular claim element, a baseband integrated circuit or processor integrated circuit for a mobile device or a similar integrated circuit in server, a cellular network device, or other computing or network device.
  • the term “communication network” refers to a network following any suitable communication standards, such as long term evolution (LTE) , LTE-advanced (LTE-A) , wideband code division multiple access (WCDMA) , high-speed packet access (HSPA) , narrow band Internet of things (NB-IoT) and so on.
  • LTE long term evolution
  • LTE-A LTE-advanced
  • WCDMA wideband code division multiple access
  • HSPA high-speed packet access
  • NB-IoT narrow band Internet of things
  • the communications between a terminal device and a network device in the communication network may be performed according to any suitable generation communication protocols, including, but not limited to, the third generation (3G) , the fourth generation (4G) , 4.5G, the fifth generation (5G) communication protocols, and/or beyond.
  • Embodiments of the present disclosure may be applied in various communication systems. Given the rapid development in communications, there will of course also be future type communication technologies and systems with which the present disclosure may be
  • the term “network device” refers to a node in a communication network via which a terminal device accesses the network and receives services therefrom.
  • the network device may refer to a base station (BS) or an access point (AP) , for example, a node B (NodeB or NB) , an evolved NodeB (eNodeB or eNB) , a NR NB (also referred to as a gNB) , a remote radio unit (RRU) , a radio header (RH) , a remote radio head (RRH) , a relay, a low power node such as a femto, a pico, and so forth, depending on the applied terminology and technology.
  • BS base station
  • AP access point
  • NodeB or NB node B
  • eNodeB or eNB evolved NodeB
  • NR NB also referred to as a gNB
  • RRU remote radio unit
  • RH radio header
  • terminal device refers to any end device that may be capable of wireless communication.
  • a terminal device may also be referred to as a communication device, user equipment (UE) , a subscriber station (SS) , a portable subscriber station, a mobile station (MS) , or an access terminal (AT) .
  • UE user equipment
  • SS subscriber station
  • MS mobile station
  • AT access terminal
  • the terminal device may include, but not limited to, a mobile phone, a cellular phone, a smart phone, voice over IP (VoIP) phones, wireless local loop phones, a tablet, a wearable terminal device, a personal digital assistant (PDA) , portable computers, desktop computer, image capture terminal devices such as digital cameras, gaming terminal devices, music storage and playback appliances, vehicle-mounted wireless terminal devices, wireless endpoints, mobile stations, laptop-embedded equipment (LEE) , laptop-mounted equipment (LME) , USB dongles, smart devices, wireless customer-premises equipment (CPE) , an Internet of things (loT) 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,
  • the term “resource” , “transmission resource” , “resource block” , “physical resource block” (PRB) , “uplink (UL) resource” or “downlink (DL) resource” may refer to any resource for performing a communication, for example, a communication between a terminal device and a network device, such as a resource in time domain, a resource in frequency domain, a resource in space domain, a resource in code domain, a resource in a combination of more than one domain or any other resource enabling a communication, and the like.
  • a resource in time domain (such as, a subframe) will be used as an example of a transmission resource for describing some example embodiments of the present disclosure. It is noted that example embodiments of the present disclosure are equally applicable to other resources in other domains.
  • RAN1 made the following agreement, as shown in Table 1.
  • the UE may be able to perform autonomous TA adjustment when cell-reselection happens as a downlink (DL) reception (Rx) reference timing would be changed according to the serving cell change.
  • the UE is also able to perform an adjustment of the uplink transmission timing based on the estimated downlink reception reference timing change. It should be noted that the network would be able to know a TA as the network indicated, but it does not mean the network can track the UE timing change.
  • the agreed directions include the necessity to study autonomous TA adjustment of UE and a related threshold as captured below, as shown in Table 2.
  • RAN4 is discussing how UE autonomously adjust the TA when cell-reselection happens. For example, in the discussion, using the requirements of autonomous TA adjustment in Clause 7.1.2.3 is an option.
  • UE can perform autonomous TA adjustment when cell-reselection happens based on the RAN1 agreement captured in Section 3. However, it is not enough as it is unclear to the gNB on what the UE autonomous TA adjustment is for. The UE may be able to perform autonomous TA adjustment, which has been already possible UE behavior for data communications. Based on the current agreement, the following issues should be addressed.
  • Issue (1) is that if the network allows, the UE performs autonomous TA adjustment. Then what is the UE behavior is unclear.
  • the UE typically performs the autonomous TA or transmission timing adjustment to keep the current TA as the downlink Rx reference timing is fluctuated due to the UE mobility or the cell reselection. This also happens although the UE does not select another cell. Thus, it is unclear what does gNB expect from the UE autonomous TA adjustment. Thus, it is unclear on what the autonomous adjustment is for.
  • Issue (2) is that how/when the UE performs TA adjustment.
  • the serving cell and neighbor gNBs may assume a single SRS transmission (Tx) timing, so the gNBs may clearly obtain the multiple measurement samples assuming the single SRS Tx timing. If the transmission timing is changed, it results in the UL timing measurement errors as gNBs cannot be aware of the timing change.
  • Tx SRS transmission
  • the TA has to be adjusted. It is essential to define how UE determines the amount of TA adjustment. It is also needed to define a condition triggering autonomous TA adjustment. Thus, new steps required for autonomous TA adjustment in SRS validity area is required.
  • a terminal device receives, from a network device, a first configuration which is used at least for configuring a sounding reference signal (SRS) valid for a plurality of cells.
  • the terminal device receives a second configuration for (i) a timing advance (TA) adjustment for a SRS transmission, and (ii) an update of downlink (DL) reception reference timing.
  • the second configuration comprises at least a first threshold and a second threshold for determining whether to perform at least one of the TA adjustment or the update of the DL reception reference timing.
  • the terminal device transmits, to the network device, the SRS based on the first configuration and the second configuration.
  • FIG. 1 illustrates an example network environment 100 in which example embodiments of the present disclosure may be implemented.
  • the network environment 100 which may be a part of a communication network, includes a terminal device 102 and a network device 104.
  • the terminal device 102 may also be referred as a user equipment 102 or a UE 102.
  • the network device 104 may also be referred as a gNB 104.
  • the terminal device 102 and the network device 104 can communicate with each other.
  • the network device 104 may be a location management function (LMF) device or a gNB.
  • the network device 104 may comprise the LMF.
  • LMF location management function
  • FIG. 2 illustrates an example signaling process 200 of a TA adjustment in accordance with some example embodiments of the present disclosure.
  • FIG. 2 will be described with reference to FIG. 1.
  • the network device 104 transmits (204) a first configuration 206 to the terminal device 102.
  • the first configuration 206 is used at least for configuring an SRS valid for a plurality of cells.
  • the terminal device 102 receives (202) the first configuration 206.
  • the terminal device 102 may be in the RRC_INACTIVE mode.
  • the network device 104 transmits (210) a second configuration 212 to the terminal device 102.
  • the second configuration 212 is for (i) a TA adjustment for a SRS transmission, and (ii) an update of DL reception reference timing.
  • the second configuration 212 comprises at least a first threshold and a second threshold for determining whether to perform at least one of the TA adjustment or the update of the DL reception reference timing.
  • the terminal device 102 receives (208) the second configuration 212.
  • the terminal device 102 transmits (214) the SRS 218 based on the first configuration 206 and the second configuration 212.
  • the network device 104 receives (216) the SRS 218.
  • the network device 104 may receive uplink positioning measurement which is made based on the SRS 218.
  • an autonomous TA adjustment based on clear conditions can be triggered, and the TA adjustment effect and the efficiency of the TA adjustment can be improved.
  • the TA adjustment to keep the current SRS transmission timing would provide a better uplink positioning measurement accuracy.
  • FIG. 3 illustrates another example signaling process 300 of a TA adjustment in accordance with some example embodiments of the present disclosure.
  • the UE 302 may correspond to the terminal device 102 in FIG. 1.
  • the gNB 304 may correspond to the network device 104 in FIG. 1.
  • the LMF 306 provides the configuration on TA adjustment condition to the UE302 and the gNB 304.
  • the LMF 306 may determines the TA adjustment condition based on an accuracy requirement on the uplink positioning measurement.
  • the uplink positioning measurement is obtained from the gNB 304 based on the SRS transmitted by the UE 302.
  • the UE 302 may report its capability.
  • the UE 302 may inform that it is LPHAP UE which is capable of performing autonomous TA adjustment to the LMF 306 and/or the gNB 304.
  • the gNB 304 may provide the UE 302 with a positioning SRS configuration valid for multiple cells.
  • the UE 302 or the LMF 306 may report its desired accuracy to gNB 304.
  • the gNB 304 or the LMF 306 may provide the UE 302 with a configuration for the UE autonomous TA adjustment.
  • the configuration may include a triggering condition on the UE autonomous TA adjustment for the multi-cell SRS transmission.
  • the gNB 304 or the LMF 306 may provide two threshold values.
  • the gNB 304 may transmit the DL RS to the UE 302.
  • the detailed triggering condition may be that the UE 302 should update (316) a DL reference signal (RS) determining a DL reception reference timing as a DL PRS resource, a SS/PBCH block, or other DL reference signals, if it can keep the current DL reception reference timing within a first threshold value with respect to the first (old) DL reception reference timing determined at the first serving cell.
  • RS DL reference signal
  • the UE 302 may evaluate a time difference between an old DL reception reference timing and a new DL reception reference timing. If the difference is greater than a second threshold value, the UE 302 may be triggered (322) to perform the autonomous TA adjustment.
  • the old DL reception timing does not necessarily mean the current DL reception timing.
  • the old DL reception timing can be the DL reception timing that UE determined at the serving cell when the UE 302 is configured with multi-cell SRS configuration.
  • SRS configuration valid for multiple cells and multi-cell SRS configuration are the same.
  • the first threshold value is equal to or less than the second threshold value.
  • the function of the first threshold value may be that based on the target measurement accuracy or requirement, if SRS transmission timing fluctuation is within the first threshold, it should be acceptable. This can enable to avoid an abrupt or huge fluctuation of transmission timing.
  • the function of the second threshold value may be that based on the first threshold, the UE 302 may update the DL reception timing so that the UE 302 could keep the old DL reception timing as much as possible. However, if it is not possible due to such as cell-reselection, the UE 302 should perform the autonomous TA adjustment.
  • the UE 302 may perform the autonomous TA adjustment and keep the new SRS Tx timing and an old SRS Tx timing within the first threshold.
  • the UE 302 may report a failure message or requests the gNB 304 not to combine measurements before and after the UE autonomous TA adjustment. As an example, if the required amount of TA adjustment is over the configurable maximum TA, the UE 302 may not be able to perform the autonomous TA adjustment.
  • the UE 302 may transmit multi-cell SRSs to the gNB 304.
  • the gNB 304 may perform positioning measurements.
  • the gNB 304 may report the positioning measurements to the LMF 306.
  • the LMF 306 may estimate location of the UE 302.
  • FIG. 3 shows signaling flows that UE initially provides LPHAP UE capability to gNB and LMF. Later, LMF provides the configuration on the autonomous TA adjustment condition including the first and second threshold values and also behavior for multi-cell SRS for positioning. After gNB transmits DL RS, it is used by UE to update DL Rx reference RS based on the configured criterion. Then UE transmits SRS without TA adjustment and gNB also transmits DL RS. Based on the configuration previously provided by LMF, if the condition is satisfied, it triggers the UE to perform the autonomous TA adjustment to transmit next SRS.
  • the autonomous TA adjustment is used to change the TA value so that the transmit timing remains the same. Otherwise, if UE is required to use a new transmit timing configured by the network, the UE is also able to change TA value so that a new transmit timing is set on the UE side.
  • the threshold may be determined based on the UE’s report on the accuracy.
  • Option 1 may be that when the indication on a threshold is sent, the threshold information may be expressed as a single variable.
  • the single value can be an index of table consisted of multiple candidate values.
  • the single value may be the real value that is directly configured as a threshold.
  • Option 2 can be that when the indication on threshold is sent, the threshold information may be consisted of two parts including a first value that can be used by default and a second value for configuration used to additionally change the default value.
  • UE may be initially configured by using the first value. If UE wants to change the threshold late, the second value may be applied to the first value by adding or subtracting the second value from the first value.
  • a threshold may be a value of the absolute different between Told and Tnew.
  • the threshold value may be used to trigger a one-time large TA adjustment.
  • the value of a threshold may be determined based on the required accuracy level of the UE or the gNB/LMF. If the UE or the gNB/LMF is required to achieve a high accuracy in the positioning, the TA adjustment may need to be frequently performed when DL timing is changed. Therefore, a small threshold may be used to achieve fine granularity in initiating the one-shot TA adjustment.
  • FIG. 4 illustrates yet another example signaling process 400 of a TA adjustment in accordance with some example embodiments of the present disclosure.
  • the UE 402 may correspond to the terminal device 102 in FIG. 1.
  • the gNB 404 may correspond to the network device 104 in FIG. 1.
  • the LMF 406 provides the positioning accuracy requirement to the gNB 404.
  • the gNB 404 determines the configuration on TA adjustment condition and send it to the UE 402.
  • the UE 402 may report its capability.
  • the UE 402 may inform that it is LPHAP UE which is capable of performing the TA adjustment to the LMF 406 and/or the gNB 404.
  • the gNB 404 may provide the UE 402 with a positioning SRS configuration valid for multiple cells.
  • the LMF 406 may report its desired accuracy to gNB 404.
  • the gNB 404 may determine a configuration for the UE autonomous TA adjustment.
  • the gNB 404 may provide the UE 402 with the configuration for the UE autonomous TA adjustment.
  • the configuration may include a triggering condition on the UE autonomous TA adjustment for the multi-cell SRS transmission.
  • the gNB 404 or the LMF 406 may provide two threshold values.
  • the gNB 404 may transmit the DL RS to the UE 402. Steps 414 to steps 432 may correspond to the respective step 314 to step 332, and thus for the purpose of simplification, these steps are not described again.
  • FIG. 5 illustrates an example of a use case 500 of the first threshold in accordance with some example embodiments of the present disclosure.
  • the UE determined a DL reception reference timing based on SSB#1.
  • the downlink reference timing can be changed as illustrated in the figure as the signal propagation time changes.
  • the UE should keep the configured TA so the transmission timing would be changed.
  • the UE will determine a new DL reception reference timing from a DL PRS transmitted from a TRP in the cells, denoted by T new (PRS#1) , which satisfies the 1 st threshold.
  • FIG. 6 illustrates an example of a use case 600 of the second threshold in accordance with some example embodiments of the present disclosure.
  • the DL Rx reference timing can be largely changed. Then such a change should trigger UE’s autonomous TA adjustment.
  • FIG. 7 illustrates an example TA adjustment for transmit timing 700 in accordance with some example embodiments of the present disclosure.
  • FIG. 7 illustrates the old DL reception reference timing and the new DL reception reference timing.
  • the old DL reception reference timing is determined at a serving cell when the UE receives a multi-cell SRS configuration, or the multi-cell SRS is activated.
  • TA value is adjusted.
  • UE can maintain the identical transmit timing for SRS transmission.
  • the configured threshold received by UE is used to compare the absolute difference between old DL timing and new DL timing. If the change is larger than the configured threshold, the one-shot large TA adjustment can be autonomously performed by UE to adjust its TA value.
  • the configured threshold for a comparison has a unit of Tc, and the value of the threshold can be tens of Tc.
  • FIG. 8 illustrates an example flowchart of a process 800 of a TA adjustment in accordance with some example embodiments of the present disclosure.
  • FIG. 8 will be described with reference to FIG. 1.
  • the terminal device 102 receives, from a network device 104, a first configuration which is used at least for configuring a sounding reference signal (SRS) valid for a plurality of cells.
  • SRS sounding reference signal
  • the terminal device 102 receives, from the network device 104, a second configuration for (i) a timing advance (TA) adjustment for a SRS transmission, and (ii) an update of downlink (DL) reception reference timing.
  • the second configuration comprises at least a first threshold and a second threshold for determining whether to perform at least one of the TA adjustment or the update of the DL reception reference timing.
  • the terminal device 102 transmits, to the network device 104, the SRS based on the first configuration and the second configuration.
  • the DL reception reference timing may be a first DL reception reference timing determined at a first cell of the plurality of cells.
  • the terminal device 102 may update a DL reception reference timing value to maintain a second DL reception reference timing determined at a second cell of the plurality of cells within the first threshold with respect to the first DL reception reference timing.
  • the terminal device 102 may determine a first time difference between the first DL reception reference timing and the second DL reception reference timing based on determining that the second DL reception reference timing is unable to be maintained within the first threshold. The terminal device 102 may perform the TA adjustment based on determining that the first time difference is above the second threshold.
  • the terminal device 102 may determine a second timing for transmitting the SRS associated with the second cell, such that a second time difference between the second timing and a first timing for transmitting the SRS associated with the first cell is within the first threshold.
  • the terminal device 102 may determine a second timing for transmitting the SRS associated with the second cell, such that a second time difference between the second timing and a first timing for transmitting the SRS associated with the first cell is minimized.
  • the first threshold may be equal to or less than the second threshold.
  • the terminal device 102 may transmit, to the network device 104, a message indicating a failure of the TA adjustment, or a request not to combine measurements before and after the TA adjustment based on determining that the TA value is unable to be adjusted to maintain the second time difference within the first threshold.
  • the terminal device may be in RRC_INACTIVE mode.
  • FIG. 9 illustrates another example flowchart of a process 900 of a TA adjustment in accordance with some example embodiments of the present disclosure.
  • FIG. 9 will be described with reference to FIG. 1.
  • the network device 104 transmits, to a terminal device 102, a first configuration which is used at least for configuring a sounding reference signal (SRS) valid for a plurality of cells.
  • SRS sounding reference signal
  • the network device 104 transmits, to the terminal device 102, a second configuration for (i) a timing advance (TA) adjustment for a SRS transmission, and (ii) an update of downlink (DL) reception reference timing.
  • the second configuration comprises at least a first threshold and a second threshold for determining whether to perform at least one of the TA adjustment or the update of the DL reception reference timing.
  • the network device 104 receives, from the terminal device 102, the SRS based on the first configuration and the second configuration, or uplink positioning measurement which is made based on the SRS.
  • the network device 104 may comprise a location management function (LMF) device or a base station (BS) .
  • the base station may be a 5G base station or a 6G base station.
  • the network device 104 may receive, from the terminal device 102, a message indicating a failure of the TA adjustment, or a request not to combine measurements before and after the TA adjustment.
  • the failure of the TA adjustment may indicate that the required amount of TA adjustment is too large.
  • the first threshold may be equal to or less than the second threshold.
  • an autonomous TA adjustment based on clear conditions can be triggered, and the TA adjustment effect and the efficiency of the TA adjustment can be improved.
  • an apparatus capable of performing the method 800 may comprise means for performing the respective steps of the method 800.
  • the means may be implemented in any suitable form.
  • the means may be implemented in a circuitry or software module.
  • the apparatus may comprise means for receiving, at a terminal device from a network device, a first configuration which is used at least for configuring a sounding reference signal (SRS) valid for a plurality of cells; means for receiving, from the network device, a second configuration for (i) a timing advance (TA) adjustment for a SRS transmission, and (ii) an update of downlink (DL) reception reference timing, wherein the second configuration comprises at least a first threshold and a second threshold for determining whether to perform at least one of the TA adjustment or the update of the DL reception reference timing; and means for transmitting, to the network device, the SRS based on the first configuration and the second configuration.
  • SRS sounding reference signal
  • the DL reception reference timing may be a first DL reception reference timing determined at a first cell of the plurality of cells
  • the apparatus may further comprise means for updating a DL reception reference timing value to maintain a second DL reception reference timing determined at a second cell of the plurality of cells within the first threshold with respect to the first DL reception reference timing.
  • the apparatus may further comprise means for determining a first time difference between the first DL reception reference timing and the second DL reception reference timing based on determining that the second DL reception reference timing is unable to be maintained within the first threshold.
  • the apparatus may further comprise means for performing the TA adjustment based on determining that the first time difference is above the second threshold.
  • the apparatus may further comprise means for determining a second timing for transmitting the SRS associated with the second cell, such that a second time difference between the second timing and a first timing for transmitting the SRS associated with the first cell is within the first threshold.
  • the apparatus may further comprise means for determining a second timing for transmitting the SRS associated with the second cell, such that a second time difference between the second timing and a first timing for transmitting the SRS associated with the first cell is minimized.
  • the first threshold may be equal to or less than the second threshold.
  • the apparatus may further comprise means for transmitting, to the network device, a message indicating a failure of the TA adjustment, or a request not to combine measurements before and after the TA adjustment based on determining that the TA value is unable to be adjusted to maintain the second time difference within the first threshold.
  • the terminal device may be in RRC_INACTIVE mode.
  • the apparatus may further comprise means for performing other steps in some example embodiments of the method 800.
  • the means comprises at least one processor and at least one memory including computer program code, the at least one memory and computer program code configured to, with the at least one processor, cause the performance of the apparatus.
  • an apparatus capable of performing the method 900 may comprise means for performing the respective steps of the method 900.
  • the means may be implemented in any suitable form.
  • the means may be implemented in a circuitry or software module.
  • the apparatus may comprise means for transmitting, at a network device to a terminal device, a first configuration which is used at least for configuring a sounding reference signal (SRS) valid for a plurality of cells; means for transmitting, to the terminal device, a second configuration for (i) a timing advance (TA) adjustment for a SRS transmission, and (ii) an update of downlink (DL) reception reference timing, wherein the second configuration comprises at least a first threshold and a second threshold for determining whether to perform at least one of the TA adjustment or the update of the DL reception reference timing; and means for receiving, from the terminal device, the SRS based on the first configuration and the second configuration, or uplink positioning measurement which is made based on the SRS.
  • SRS sounding reference signal
  • the apparatus may comprise a location management function (LMF) device or a base station (BS) .
  • the apparatus may further comprise means for receiving, from the terminal device, a message indicating a failure of the TA adjustment, or a request not to combine measurements before and after the TA adjustment.
  • the first threshold may be equal to or less than the second threshold.
  • the apparatus may further comprise means for performing other steps in some example embodiments of the method 900.
  • the means comprises at least one processor and at least one memory including computer program code, the at least one memory and computer program code configured to, with the at least one processor, cause the performance of the apparatus.
  • FIG. 10 illustrates an example simplified block diagram of a device 1000 that is suitable for implementing embodiments of the present disclosure.
  • the device 1000 may be provided to implement the communication device, for example the terminal device 102 as shown in FIG. 1.
  • the device 1000 includes one or more processors 1010, one or more memories 1020 may couple to the processor 1010, and one or more communication modules 1040 may couple to the processor 1010.
  • the communication module 1040 is for bidirectional communications.
  • the communication module 1040 has at least one antenna to facilitate communication.
  • the communication interface may represent any interface that is necessary for communication with other network elements, for example the communication interface may be wireless or wireline to other network elements, or software based interface for communication.
  • the processor 1010 may be of any type suitable to the local technical network and may include one or more of the following: general purpose computers, special purpose computers, microprocessors, digital signal processors (DSPs) and processors based on multicore processor architecture, as non-limiting examples.
  • the device 1000 may have multiple processors, such as an application specific integrated circuit chip that is slaved in time to a clock which synchronizes the main processor.
  • the memory 1020 may include one or more non-volatile memories and one or more volatile memories.
  • the non-volatile memories include, but are not limited to, a read only memory (ROM) 1024, an electrically programmable read only memory (EPROM) , a flash memory, a hard disk, a compact disc (CD) , a digital video disk (DVD) , and other magnetic storage and/or optical storage.
  • the volatile memories include, but are not limited to, a random access memory (RAM) 1022 and other volatile memories that will not last in the power-down duration.
  • a computer program 1030 includes computer executable instructions that are executed by the associated processor 1010.
  • the program 1030 may be stored in the ROM 1024.
  • the processor 1010 may perform any suitable actions and processing by loading the program 1030 into the RAM 1022.
  • the embodiments of the present disclosure may be implemented by means of the program so that the device 1000 may perform any process of the disclosure as discussed with reference to FIG. 2 to FIG. 9.
  • the embodiments of the present disclosure may also be implemented by hardware or by a combination of software and hardware.
  • the program 1030 may be tangibly contained in a computer readable medium which may be included in the device 1000 (such as in the memory 1020) or other storage devices that are accessible by the device 1000.
  • the device 1000 may load the program 1030 from the computer readable medium to the RAM 1022 for execution.
  • the computer readable medium may include any types of tangible non-volatile storage, such as ROM, EPROM, a flash memory, a hard disk, CD, DVD, and the like.
  • FIG. 11 shows an example of the computer readable medium 1100 in form of CD or DVD.
  • the computer readable medium has the program 1030 stored thereon.
  • various embodiments of the present disclosure may be implemented in hardware or special purpose circuits, software, logic or any combination thereof. Some aspects may be implemented in hardware, while other aspects may be implemented in firmware or software which may be executed by a controller, microprocessor or other computing device. While various aspects of embodiments of the present disclosure are illustrated and described as block diagrams, flowcharts, or using some other pictorial representations, it is to be understood that the block, apparatus, system, technique or method described herein may be implemented in, as non-limiting examples, hardware, software, firmware, special purpose circuits or logic, general purpose hardware or controller or other computing devices, or some combination thereof.
  • the present disclosure also provides at least one computer program product tangibly stored on a non-transitory computer readable storage medium.
  • the computer program product includes computer-executable instructions, such as those included in program modules, being executed in a device on a target real or virtual processor, to carry out the methods 800 or 900 as described above with reference to FIG. 8 or FIG. 9.
  • program modules include routines, programs, libraries, objects, classes, components, data structures, or the like that perform particular tasks or implement particular abstract data types.
  • the functionality of the program modules may be combined or split between program modules as desired in various embodiments.
  • Machine-executable instructions for program modules may be executed within a local or distributed device. In a distributed device, program modules may be located in both local and remote storage media.
  • Program code for carrying out methods of the present disclosure may be written in any combination of one or more programming languages. These program codes may be provided to a processor or controller of a general purpose computer, special purpose computer, or other programmable data processing apparatus, such that the program codes, when executed by the processor or controller, cause the functions/operations specified in the flowcharts and/or block diagrams to be implemented.
  • the program code may execute entirely on a machine, partly on the machine, as a stand-alone software package, partly on the machine and partly on a remote machine or entirely on the remote machine or server.
  • the computer program codes or related data may be carried by any suitable carrier to enable the device, apparatus or processor to perform various processes and operations as described above.
  • Examples of the carrier include a signal, computer readable medium, and the like.
  • the computer readable medium may be a computer readable signal medium or a computer readable storage medium.
  • a computer readable medium may include but not limited to an electronic, magnetic, optical, electromagnetic, infrared, or semiconductor system, apparatus, or device, or any suitable combination of the foregoing. More specific examples of the computer readable storage medium would include an electrical connection having one or more wires, a portable computer diskette, a hard disk, a random access memory (RAM) , a read-only memory (ROM) , an erasable programmable read-only memory (EPROM or Flash memory) , an optical fiber, a portable compact disc read-only memory (CD-ROM) , an optical storage device, a magnetic storage device, or any suitable combination of the foregoing.
  • non-transitory is a limitation of the medium itself (i.e., tangible, not a signal) as opposed to a limitation on data storage persistency (e.g., RAM vs. ROM) .

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  • Computer Networks & Wireless Communication (AREA)
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Abstract

Des modes de réalisation de la présente divulgation concernent un ajustement d'avance temporelle (TA). Selon un aspect, un dispositif terminal reçoit, d'un dispositif de réseau, une première configuration qui est utilisée au moins pour configurer un signal de référence de sondage (SRS) valide pour une pluralité de cellules, et une seconde configuration pour (i) un ajustement d'avance temporelle (TA) pour une transmission de signal SRS, et (ii) une mise à jour de relations temporelles de référence de réception de liaison descendante (DL). Le dispositif terminal transmet, au dispositif de réseau, le signal SRS sur la base de la première configuration et de la seconde configuration. Par la mise en œuvre des modes de réalisation de la présente divulgation, un ajustement autonome de TA sur la base de conditions claires peut être déclenché, et l'effet de réglage de TA et l'efficacité de l'ajustement de TA peuvent être améliorés.
PCT/CN2023/122081 2023-09-27 2023-09-27 Ajustement d'avance temporelle Pending WO2025065350A1 (fr)

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Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20190075531A1 (en) * 2016-02-25 2019-03-07 Datang Mobile Commmunications Equipment Co., Ltd. Method and device for realizing synchronization
CN112823550A (zh) * 2018-09-28 2021-05-18 华为技术有限公司 一种上行信号的传输方法和设备
US20210400734A1 (en) * 2020-06-23 2021-12-23 Qualcomm Incorporated Methods and apparatus for supporting positioning in idle or inactive mode
CN115989714A (zh) * 2020-07-07 2023-04-18 欧芬诺有限责任公司 验证处于非活动状态的预配置资源

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20190075531A1 (en) * 2016-02-25 2019-03-07 Datang Mobile Commmunications Equipment Co., Ltd. Method and device for realizing synchronization
CN112823550A (zh) * 2018-09-28 2021-05-18 华为技术有限公司 一种上行信号的传输方法和设备
US20210400734A1 (en) * 2020-06-23 2021-12-23 Qualcomm Incorporated Methods and apparatus for supporting positioning in idle or inactive mode
CN115989714A (zh) * 2020-07-07 2023-04-18 欧芬诺有限责任公司 验证处于非活动状态的预配置资源

Non-Patent Citations (2)

* Cited by examiner, † Cited by third party
Title
MODERATOR (CMCC): "Summary #3 for low power high accuracy positioning", 3GPP DRAFT; R1-2301969, 3RD GENERATION PARTNERSHIP PROJECT (3GPP), MOBILE COMPETENCE CENTRE ; 650, ROUTE DES LUCIOLES ; F-06921 SOPHIA-ANTIPOLIS CEDEX ; FRANCE, vol. RAN WG1, no. Athens, Greece; 20230227 - 20230303, 3 March 2023 (2023-03-03), Mobile Competence Centre ; 650, route des Lucioles ; F-06921 Sophia-Antipolis Cedex ; France, XP052249340 *
XUEMING PAN, VIVO: "Discussion on low power high accuracy positioning", 3GPP DRAFT; R1-2302494; TYPE DISCUSSION; NR_POS_ENH2-CORE, 3RD GENERATION PARTNERSHIP PROJECT (3GPP), MOBILE COMPETENCE CENTRE ; 650, ROUTE DES LUCIOLES ; F-06921 SOPHIA-ANTIPOLIS CEDEX ; FRANCE, vol. RAN WG1, no. Online; 20230417 - 20230426, 7 April 2023 (2023-04-07), Mobile Competence Centre ; 650, route des Lucioles ; F-06921 Sophia-Antipolis Cedex ; France, XP052293068 *

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