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WO2025065378A1 - Procédé de communication sans fil et dispositif associé - Google Patents

Procédé de communication sans fil et dispositif associé Download PDF

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Publication number
WO2025065378A1
WO2025065378A1 PCT/CN2023/122174 CN2023122174W WO2025065378A1 WO 2025065378 A1 WO2025065378 A1 WO 2025065378A1 CN 2023122174 W CN2023122174 W CN 2023122174W WO 2025065378 A1 WO2025065378 A1 WO 2025065378A1
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WO
WIPO (PCT)
Prior art keywords
signal
scell
communication method
wireless communication
activated
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/CN2023/122174
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English (en)
Inventor
Xuan MA
Mengzhu CHEN
Jun Xu
Bo Dai
Jianqiang DAI
Xiaoying Ma
Qiujin GUO
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.)
ZTE Corp
Original Assignee
ZTE Corp
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 ZTE Corp filed Critical ZTE Corp
Priority to PCT/CN2023/122174 priority Critical patent/WO2025065378A1/fr
Publication of WO2025065378A1 publication Critical patent/WO2025065378A1/fr
Pending legal-status Critical Current
Anticipated expiration legal-status Critical

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Classifications

    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L5/00—Arrangements affording multiple use of the transmission path
    • H04L5/0001—Arrangements for dividing the transmission path
    • H04L5/0003—Two-dimensional division
    • H04L5/0005—Time-frequency
    • H04L5/0007—Time-frequency the frequencies being orthogonal, e.g. OFDM(A) or DMT
    • H04L5/001—Time-frequency the frequencies being orthogonal, e.g. OFDM(A) or DMT the frequencies being arranged in component carriers
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L5/00—Arrangements affording multiple use of the transmission path
    • H04L5/003—Arrangements for allocating sub-channels of the transmission path
    • H04L5/0053—Allocation of signalling, i.e. of overhead other than pilot signals

Definitions

  • This document is directed generally to wireless communications and in particular to 5G communications.
  • NR new radio
  • cell activation and deactivation are triggered by a network device (e.g., a BS (base station) ) .
  • a network device e.g., a BS (base station)
  • a BS may not obtain the corresponding requirements in a timely manner, which may cause great delay, e.g., on activating SCell (s) (secondary cell (s) ) and affect user experience. Therefore, an SCell activation procedure may be needed for avoiding the SCell activation delay and/or reducing the power consumption during the SCell activation procedure.
  • This document relates to methods, systems, and devices for activating SCell (s) , and in particular to methods, systems, and devices for activating SCell (s) via a UE.
  • the present disclosure relates to a wireless communication method for use in a wireless terminal.
  • the method comprises:
  • the first signal comprises at least one of: an SCell activation request, a downlink (DL) signal indicator of one or more DL signals on the at least one SCell to be activated, or an uplink (UL) signal transmission indicator of one or more UL signals for the at least one SCell to be activated.
  • an SCell activation request a downlink (DL) signal indicator of one or more DL signals on the at least one SCell to be activated
  • an uplink (UL) signal transmission indicator of one or more UL signals for the at least one SCell to be activated.
  • the one or more DL signals comprise at least one of: a discovery reference signal, a channel state information reference signal, a tracking reference signal or a synchronization signal block.
  • the one or more UL signals comprise at least one of: a channel state information report, a sounding reference signal or a preamble.
  • the first signal is carried by a physical UL control channel (PUCCH) or a sequence.
  • PUCCH physical UL control channel
  • the PUCCH is in a PUCCH format 0, wherein a value for computing a value of a cyclic shift of sequences for the PUCCH format 0 is determined by information to be transmitted by the PUCCH format 0.
  • the PUCCH is in a PUCCH format 2, a PUCCH format 3 or a PUCCH format 4, wherein uplink control information (UCI) bits of the PUCCH are arranged according to information carried by the PUCCH.
  • UCI uplink control information
  • the sequence is generated based on at least one of an SCell index, a root sequence index, an initialization seed or a sequence identifier.
  • the wireless communication method further comprises: receiving, from the wireless network node, a second signal in response to the first signal.
  • the second signal is carried by a PDCCH, a MAC CE, DL control information (DCI) or a sequence.
  • DCI DL control information
  • the DCI is a DCI format 1_0 with cyclic redundancy check bits scrambled by one of a cell radio network temporary identifier (C-RNTI) , a random access radio network temporary identifier (RA-RNTI) , a MsgB radio network temporary identifier or a specific radio network temporary identifier configured by a high layer parameter.
  • C-RNTI cell radio network temporary identifier
  • RA-RNTI random access radio network temporary identifier
  • MsgB radio network temporary identifier MsgB radio network temporary identifier
  • specific radio network temporary identifier configured by a high layer parameter.
  • the second signal comprises at least one of: acknowledgement information for the first signal, a carrier indicator of one or more SCells to be activated, a DL signal indication of one or more DL signal transmissions on one or more SCells to be activated, or a UL transmission indicator of one or more UL signal transmissions on one or more SCells to be activated.
  • the one or more DL signals comprise at least one of: a discovery reference signal (DRS) , a channel state information reference signal (CSI-RS) , a tracking reference signal (TRS) or a synchronization signal block (SSB) .
  • DRS discovery reference signal
  • CSI-RS channel state information reference signal
  • TRS tracking reference signal
  • SSB synchronization signal block
  • the one or more UL signals comprise at least one of: a channel state information report, a sounding reference signal (SRS) or a preamble.
  • SRS sounding reference signal
  • the second signal is a reference signal on one or more SCells to be activated, wherein the reference signal comprises at least one of an SSB, a DRS, a CSI-RS or a TRS.
  • the wireless communication method further comprises: transmitting, to the wireless network node, a third signal in response to a successful reception of the second signal.
  • receiving, from the wireless network node, the second signal in response to the first signal comprises: detecting the second signal after the transmission of the first signal.
  • monitoring occasions of the second signal start from N symbols after a first symbol or a last symbol of a transmission occasion of the transmission of the first signal, wherein N is a positive integer.
  • monitoring occasions of the second signal start from slot n+k, wherein slot n is the slot in which the first signal is transmitted and k is a positive integer.
  • monitoring occasions of the second signal start from the N-th symbol in slot n+k, wherein slot n is the slot in which the first signal is transmitted and N and k are positive integers.
  • the wireless communication method further comprises: transmitting, to the wireless network node, one or more UL signals on the SCell indicated by the first signal or the second signal.
  • the UL signal comprises at least one of: CSI reporting for the SCell, feedback for the wireless network node, or a reference signal or a preamble for timing advance (TA) acquisition or channel estimation.
  • CSI reporting for the SCell feedback for the wireless network node
  • TA timing advance
  • the present disclosure relates to a wireless communication method for use in a wireless network node.
  • the method comprises: receiving, from a wireless terminal, a first signal of activating at least one secondary cell (SCell) .
  • SCell secondary cell
  • the first signal comprises at least one of: an SCell activation request, a downlink (DL) signal indicator of one or more DL signals on the at least one SCell to be activated, or an uplink (UL) signal transmission indicator of one or more UL signals for the at least one SCell to be activated.
  • an SCell activation request a downlink (DL) signal indicator of one or more DL signals on the at least one SCell to be activated
  • an uplink (UL) signal transmission indicator of one or more UL signals for the at least one SCell to be activated.
  • the one or more DL signals comprise at least one of: a discovery reference signal, a channel state information reference signal, a tracking reference signal or a synchronization signal block.
  • the one or more UL signals comprise at least one of: a channel state information report, a sounding reference signal or a preamble.
  • the first signal is carried by a physical UL control channel (PUCCH) or a sequence.
  • PUCCH physical UL control channel
  • the PUCCH is in a PUCCH format 0, wherein a value for computing a value of a cyclic shift of sequences for the PUCCH format 0 is determined by information to be transmitted by the PUCCH format 0.
  • the PUCCH is in a PUCCH format 2, a PUCCH format 3 or a PUCCH format 4, wherein uplink control information (UCI) bits of the PUCCH are arranged according to information carried by the PUCCH.
  • UCI uplink control information
  • the sequence is generated based on at least one of an SCell index, a root sequence index, an initialization seed or a sequence identifier.
  • the wireless communication method further comprises: transmitting, to the wireless terminal, a second signal in response to the first signal.
  • the second signal is carried by a PDCCH, a MAC CE, DL control information (DCI) or a sequence.
  • DCI DL control information
  • the DCI is a DCI format 1_0 with cyclic redundancy check bits scrambled by one of a cell radio network temporary identifier (C-RNTI) , a random access radio network temporary identifier (RA-RNTI) , a MsgB radio network temporary identifier or a specific radio network temporary identifier configured by a high layer parameter.
  • C-RNTI cell radio network temporary identifier
  • RA-RNTI random access radio network temporary identifier
  • MsgB radio network temporary identifier MsgB radio network temporary identifier
  • specific radio network temporary identifier configured by a high layer parameter.
  • acknowledgement information for the first signal a carrier indicator of one or more SCells to be activated, a DL signal indication of one or more DL signal transmissions/bursts on one or more SCells to be activated, or a UL transmission indicator of one or more UL signal transmissions on one or more SCells to be activated.
  • one or more DL signals comprise at least one of: a discovery reference signal (DRS) , a channel state information reference signal (CSI-RS) , a tracking reference signal (TRS) or a synchronization signal block (SSB) .
  • DRS discovery reference signal
  • CSI-RS channel state information reference signal
  • TRS tracking reference signal
  • SSB synchronization signal block
  • the one or more UL signals comprise at least one of: a channel state information report, a sounding reference signal (SRS) or a preamble.
  • SRS sounding reference signal
  • the second signal is a reference signal on one or more SCells to be activated, wherein the reference signal comprises at least one of a SSB, a DRS, a CSI-RS or a TRS.
  • the wireless communication method further comprises: receiving, from the wireless terminal, a third signal in response to a successful reception of the second signal.
  • transmitting, to the wireless terminal, the second signal in response to the first signal comprises: transmitting the second signal after the reception of the first signal.
  • transmission occasions of the second signal start from N symbols after a first symbol or a last symbol of a transmission occasion of the transmission of the first signal, wherein N is a positive integer.
  • transmission occasions of the second signal start from slot n+k, wherein slot n is the slot in which the first signal is transmitted and k is a positive integer.
  • transmission occasions of the second signal start from the N-th symbol in slot n+k, wherein slot n is the slot in the first signal is transmitted and N and k are positive integers.
  • the wireless communication method further comprises: receiving, from the wireless terminal, one or more UL signals on the SCell indicated by the first signal or the second signal.
  • the UL signal comprises at least one of: CSI reporting for the SCell, feedback for the wireless network node, or a reference signal or a preamble for TA acquisition or channel estimation.
  • the present disclosure relates to a wireless communication method for use in a wireless terminal.
  • the method comprises:
  • SCell secondary cell
  • DL downlink
  • the at least one SCell satisfies at least one of: no synchronization signal block (SSB) is transmitted on the SCell when the SCell is activated, or no periodic TRS is transmitted on the SCell when the SCell is activated.
  • SSB synchronization signal block
  • the DL signal comprises at least one of: a synchronization signal block, a channel state information reference signal, a tracking reference signal, or a discovery reference signal.
  • the wireless communication method further comprises: transmitting, to the wireless network node, a third signal based on the reception of the second signal.
  • the wireless communication method further comprises: detecting the at least one DL signal burst.
  • the wireless communication method further comprises: transmitting, to the wireless network node, a specific uplink signal.
  • the specific uplink signal comprises at least one of a channel state information report, a sounding reference signal or a preamble.
  • the present disclosure relates to a wireless communication method for use in a wireless network node.
  • the method comprises
  • the at least one SCell satisfies at least one of:
  • SSB synchronization signal block
  • the DL signal comprises at least one of: a synchronization signal block, a channel state information reference signal, a tracking reference signal, or a discovery reference signal.
  • the wireless communication method further comprises: receiving, from the wireless terminal, a third signal in response to the second signal.
  • the wireless communication method further comprises: transmitting the at least one DL signal burst.
  • the wireless communication method further comprises: receiving from the wireless terminal, a specific uplink signal.
  • the specific uplink signal comprises at least one of a channel state information report, a sounding reference signal or a preamble.
  • the present disclosure relates to a wireless terminal.
  • the wireless terminal comprises:
  • a communication unit configured to transmit, to a wireless network node, a first signal of activating at least one secondary cell (SCell) .
  • SCell secondary cell
  • Various embodiments may preferably implement the following feature:
  • the wireless terminal further comprises a processor configured to perform any of the aforementioned wireless communication methods.
  • the present disclosure relates to a wireless network node.
  • the wireless network node comprises:
  • a communication unit configured to receive, from a wireless terminal, a first signal of activating at least one secondary cell (SCell) .
  • SCell secondary cell
  • Various embodiments may preferably implement the following feature:
  • the wireless network node further comprises a processor configured to perform any of the aforementioned wireless communication methods.
  • the present disclosure relates to a wireless terminal.
  • the wireless terminal comprises:
  • a communication unit configured to receive, from a wireless network node, a second signal of activating at least one secondary cell (SCell) , wherein the second signal indicates at least one downlink (DL) signal burst on the at least one SCell to be activated.
  • SCell secondary cell
  • Various embodiments may preferably implement the following feature:
  • the wireless terminal further comprises a processor configured to perform any of the aforementioned wireless communication methods.
  • the present disclosure relates to a wireless network node.
  • the wireless network node comprises:
  • a communication unit configured to transmitting, to a wireless terminal, a second signal of activating at least one secondary cell (SCell) , wherein the second signal indicates at least one downlink (DL) signal burst on the at least one SCell to be activated.
  • SCell secondary cell
  • Various embodiments may preferably implement the following feature:
  • the wireless network node further comprises a processor configured to perform any of the aforementioned wireless communication methods.
  • the present disclosure relates to a computer program product comprising a computer-readable program medium code stored thereupon, the code, when executed by a processor, causing the processor to implement a wireless communication method recited in any one of foregoing methods.
  • the present disclosure is not limited to the exemplary embodiments and applications described and illustrated herein. Additionally, the specific order and/or hierarchy of steps in the methods disclosed herein are merely exemplary approaches. Based upon design preferences, the specific order or hierarchy of steps of the disclosed methods or processes can be re-arranged while remaining within the scope of the present disclosure. Thus, those of ordinary skill in the art will understand that the methods and techniques disclosed herein present various steps or acts in a sample order, and the present disclosure is not limited to the specific order or hierarchy presented unless expressly stated otherwise.
  • FIG. 1 shows a schematic diagram of signals for SCell activation/deactivation according to an embodiment of the present disclosure.
  • FIG. 2 shows a schematic diagram of signals for SCell activation/deactivation according to an embodiment of the present disclosure.
  • FIG. 3 shows a schematic diagram of signals for SCell activation/deactivation according to an embodiment of the present disclosure.
  • FIG. 4 shows a schematic diagram of signals for SCell activation/deactivation according to an embodiment of the present disclosure.
  • FIG. 5 shows a schematic diagram of a network (architecture) according to an embodiment of the present disclosure.
  • FIG. 6 shows an example of a schematic diagram of a wireless terminal according to an embodiment of the present disclosure.
  • FIG. 7 shows an example of a schematic diagram of a wireless network node according to an embodiment of the present disclosure.
  • FIG. 8 shows a flowchart of a method according to an embodiment of the present disclosure.
  • FIG. 9 shows a flowchart of a method according to an embodiment of the present disclosure.
  • FIG. 10 shows a flowchart of a method according to an embodiment of the present disclosure.
  • FIG. 11 shows a flowchart of a method according to an embodiment of the present disclosure.
  • a gNB e.g., BS, RAN (radio access network) , or RAN node
  • SCell Activation/Deactivation MAC media access control
  • Enhanced SCell Activation/Deactivation MAC CE control element
  • the UE receives the MAC CE and transmits ACK/NACK information to the gNB.
  • the UE applies normal SCell operation (s) including: RS (reference signal) transmissions on the SCell; CSI (channel state information) reporting for the SCell; PDCCH (physical downlink control channel) monitoring on the SCell; PDCCH monitoring for the SCell; PUCCH (physical uplink control channel) transmissions on the SCell, if configured.
  • normal SCell operation including: RS (reference signal) transmissions on the SCell; CSI (channel state information) reporting for the SCell; PDCCH (physical downlink control channel) monitoring on the SCell; PDCCH monitoring for the SCell; PUCCH (physical uplink control channel) transmissions on the SCell, if configured.
  • FIG. 1 shows a schematic diagram of signals for SCell activation/deactivation according to an embodiment of the present disclosure.
  • the UE detects a second signal and performs the corresponding operations in response to the second signal.
  • the second signal is carried by a PDCCH or a MAC CE.
  • the second signal indicates at least one of activating or deactivating one or more configured SCells, triggering one or more DL signal burst on the SCells to be activated.
  • the DL signal comprises at least one of SSB (synchronization signal block) , CSI-RS, TRS (tracking reference signal) , or DRS (discovery reference signal) .
  • the SSB is an on-demand SSB.
  • the DL signal is an aperiodic reference signal.
  • DRS comprises at least one of the SSS (secondary reference signal) or the PSS (primary reference signal) .
  • the operations performed by the UE in response to the second signal comprises at least one of: transmitting a third signal, detecting DL signal, transmitting a specific UL signal.
  • the specific UL signal comprises at least one of a CSI report, an SRS (sounding reference signal) , a preamble.
  • the third signal comprises ACK/NACK information. That is, in response to the second signal, the UE transmits the ACK/NACK information to the gNB. If the second signal is received successfully, the UE transmits the ACK information to the gNB. If the second signal not received successfully, the UE transmits the NACK information to the gNB.
  • the UE detects the DL signal burst in the SCell to be activated.
  • the SCell to be activated is a SSB-less SCell.
  • the SSB-less SCell satisfies at least one of: no SSB is transmitted on the SCell when the SCell is activated, or no periodic TRS is transmitted on the SCell when the SCell is activated.
  • only the UE with the capability that supports the SSB-less SCell can detect the second signal and performs the operations in response to the second signal.
  • FIG. 2 shows a schematic diagram of signals for Scell activation/deactivation according to an embodiment of the present disclosure.
  • the UE transmits a first signal to the network.
  • the first signal comprises at least one of an SCell activation request, a DL signal indicator, a specific UL signal transmission indicator.
  • the DL signal indicator indicates one or more DL signal transmissions.
  • the DL signal comprises at least one of SSB, CSI-RS, TRS, or DRS.
  • the SSB is an on-demand SSB.
  • the DL signal is an aperiodic reference signal.
  • the second signal is carried by a PDCCH or a MAC CE.
  • the second signal indicates at least one of activating or deactivating one or more configured SCells, triggering one or more DL signal burst on the SCells to be activated.
  • the UE in response to the second signal, transmits a third signal to the gNB.
  • the third signal comprises ACK/NACK information.
  • the UE transmits the ACK/NACK information to the gNB. If the second signal is received successfully, the UE transmits the ACK information to the gNB. If the second signal not received successfully, the UE transmits the NACK information to the gNB.
  • the UE detects the DL signal burst in the SCell (s) to be activated.
  • the UE after detecting the DL signal bursts, transmits one or more specific UL signals to the gNB.
  • FIG. 3 shows a schematic diagram of signals for Scell activation/deactivation according to an embodiment of the present disclosure.
  • the UE transmits a first signal to network.
  • the first signal comprises at least one of an SCell activation request, a DL signal indicator, a specific UL signal transmission indicator.
  • the DL signal indicator indicates one or more DL signal transmission.
  • the DL signal comprises at least one of SSB, CSI-RS, TRS, or DRS (discovery reference signal) .
  • the second signal is the feedback for receiving the first signal.
  • the second signal is carried by a PDCCH or a sequence.
  • the second signal comprises at least one of an acknowledgement information, a carrier indicator or a DL signal transmission indicator.
  • the UE detects the DL signal bursts in the SCell to be activated.
  • the UE after detecting the DL signal bursts, the UE transmits one or more specific UL signals to the gNB.
  • FIG. 4 shows a schematic diagram of signals for Scell activation/deactivation according to an embodiment of the present disclosure.
  • the UE transmits a first signal to network.
  • the first signal comprises an SCell activation request.
  • the second signal is the feedback for receiving the first signal.
  • the second signal is carried by a PDCCH or a sequence.
  • the second signal comprises at least one of an acknowledgement information, a carrier indicator, a specific UL signal transmission indicator.
  • the UE after detecting the DL signal bursts, the UE transmits one or more specific UL signals to the gNB.
  • the specific UL signal is used for TA (timing advance) acquisition or channel estimation.
  • At least one of the detection/transmission of the first signal, the second signal, the third signal, the one or more DL signal bursts or the specific UL signal can be skipped or omitted during the SCell activation procedure.
  • a first signal can be a first signaling
  • a second signal can be a second signaling
  • a third signal can be a third signaling
  • the UE transmits a first signal to the network.
  • the first signal comprises an SCell activation request.
  • the first signal indicates to activate an SSB-less SCell.
  • the SSB-less SCell satisfies at least one of: no SSB is transmitted on the SCell when the SCell is activated, no periodic SSB is transmitted on the SCell when the SCell is activated, or no periodic TRS is transmitted on the SCell when the SCell is activated.
  • the UE may transmit one or more specific UL signals to the gNB, wherein the specific UL signal can be an SRS or a preamble.
  • the specific UL signal is used for TA (timing advance) acquisition or channel estimation.
  • the specific UL signal includes the CSI (channel state information) report.
  • the UE transmits a first signal/signaling to gNB.
  • the first signal is transmitted in a specific cell
  • the specific cell is a PCell (primary cell) or PSCell (primary secondary cell) or an anchor cell.
  • the first signal comprises one or more SCell activation requests.
  • the first signal further comprises a reference signal indication to indicate whether to active one or more DL signal burst (e.g., CSI-RS, TRS, SSB) for a (set of) target cell (s) .
  • the target cell is a deactivated SCell.
  • the first signaling comprises at least one of:
  • the SCell activation request comprises one bit. For example, a positive bit (i.e., bit ‘1’ ) indicates that SCell (s) is requested to be activated.
  • the SCell activation request comprises one or more bits.
  • the SCell activation request is in a form of code point.
  • the code point indicates an SCell index.
  • the SCell with the SCell Index indicated by the SCell activation request is to be activated.
  • the SCell activation request is in a form of bitmap. Each bit of the SCell activation request corresponds to one SCell. The bit of the SCell activation request is set to 1 to indicate that the SCell corresponding to the bit shall be activated.
  • the DL signal indication indicates whether one or more DL signal burst, for example, DRS, CSI-RS burst, TRS burst, SSB burst, for a (set of) target cell (s) will be activated.
  • the DL signal indication indicates a resource or a resource set of the one or more DL signal bursts for a (set of) target cell (s) will be activated.
  • the DL signal burst is periodic. In some embodiments, the DL signal burst is transmitted in a duration. The duration is determined by high layer parameters. In some embodiments, the duration starts at M slots or M symbols after at least one of the first signaling, the second signaling or the third signaling, where M is a positive value/integer. In some embodiments, M is determined by high layer parameters.
  • the first slot of the i-th DL signal burst starts at the m i -th slot after the last slot of at least one of a first signaling, a second signaling or a third signaling.
  • the m i is determined by high layer parameters.
  • the first slot of the first DL signal burst starts at the m 1 -th slot after the last slot of at least one of the first signaling, the second signaling or the third signaling and the i-th (i>1) DL signal burst starts at the mi-th slot after the end of the (i-1) -th DL signal burst.
  • the UL transmission indication indicates one or more specific UL signal transmissions.
  • the specific UL signal comprises at least one of a CSI report, an SRS, or a preamble.
  • the specific UL transmission is a CSI report.
  • the CSI report is based on the detection of the DL signals transmitted on the SCell, wherein the DL signals are indicated by at least one of the first signal or the second signal.
  • the specific UL transmission is a CSI report based on the SSB or the TRS transmitted on the SCell.
  • the specific UL transmission is an SRS or a preamble used for TA (timing advance) acquisition or channel estimation.
  • the first signaling is carried by a PUCCH with PUCCH format 0.
  • different values of cyclic shift are used.
  • the value m CS for computing a value of cyclic shift is determined by the information to be transmitted by PUCCH format 0.
  • the UE transmits a PUCCH in the PUCCH resource for the corresponding first signaling configuration only when/if the UE transmits a positive first signaling.
  • a positive first signaling comprises an SCell activation request.
  • the UE transmits a PUCCH with a positive first signaling and at most two HARQ-ACK information bits in a resource using the PUCCH format 0.
  • the UE does not transmit the SR (scheduling request) and the first signaling at the same time.
  • the first signaling is carried by a PUCCH with PUCCH format 2/3/4.
  • the bits of the first signaling are transmitted on a PUCCH with a PUCCH format 2/3/4
  • the UCI bit sequence can be mapped according to the transmission content.
  • the UCI bit sequence can be described as b 0 , b 1 , b 2 , b 3 , ..., b A-1 , wherein A is the total number of the UCI bits.
  • the UCI bit sequence can be b 0 , b 1 , b 2 , b 3 , ..., b A-1 , wherein A is the number of bits of the first signaling.
  • both first signaling bits and other UCI bits are transmitted on a PUCCH
  • the UCI bit sequence can be mapped as bits of the first signaling, the HARQ-ACK bits (if any) , the SR bits (if any) , the CSI bits (if any) .
  • the UCI bit sequence can be b 0 , b 1 , b 2 , b 3 , ..., b A-1 , wherein A is the number of bits of the sum of the first signaling, the HARQ-ACK, the SR and the CSI.
  • both first signaling bits and other UCI bits are transmitted on a PUCCH
  • the UCI bit sequence can be mapped as: HARQ-ACK bits (if any) , SR bits (if any) , CSI bits (if any) , bits of first signaling.
  • the first signaling is carried by a sequence.
  • the generation of the first signaling is associated with at least one of:an SCell index, a root sequence index, an initialization seed, or a sequence ID.
  • an SCell index corresponds to different root sequence index, when the sequence is detected, the SCell index of the SCell to be activated can be obtained.
  • the first signaling is carried by a ZC sequence.
  • first signaling being the ZC sequence
  • different first signaling sequences are generated by different root sequences or by cyclic shift.
  • each first signaling sequences comprises a group of information. For example, each sequence corresponds to one SCell index.
  • the generation of the first signaling is the same as that of a RACH preamble.
  • the first signaling is carried by a MAC CE.
  • the MAC CE also includes a BSR (buffer status report) .
  • the first signaling is the BSR.
  • the first signaling is carried by a scheduling request (SR) .
  • SR scheduling request
  • activation indications of different SCells are carried by different first signalings (e.g., sequences) .
  • the activation indications of different SCells are mapped to different time and/or frequency resources. For example, each SCell is associated with one SRS/PRACH resource.
  • the first signaling is transmitted by using the same time resources and frequency resources for physical random access channel (PRACH) transmission.
  • PRACH physical random access channel
  • the first signaling (i.e., sequences) in different time/frequency resources carries different information.
  • the sequences transmitted in different time/frequency resources correspond to different SCell indexes.
  • the transmission occasions of the first signaling are configured by high layer parameters (e.g., RRC parameters) .
  • the transmission occasions of the first signaling are determined by at least one of a period, a start point, a duration, an end point.
  • the transmission occasions of the first signaling are periodic.
  • the period of the transmission occasions is configured by RRC parameters.
  • the first signaling is transmitted within a duration.
  • the first signaling is repeatedly transmitted within the duration.
  • the first signaling is repeatedly transmitted within the duration when/if at least one of the following conditions is met: no second signal is detected in response to the first signal; no DL signal is detected on the SCell to be activated; or no UL signal is transmitted on the SCell to be activated.
  • the first signaling can be transmitted for a maximum of N times, wherein N ⁇ 1. In some embodiments, the first signaling is repeatedly transmitted for N times at most when/if at least one of the following conditions is met: no second signal is detected in response to the first signal; no DL signal is detected on the SCell to be activated; no UL signal is transmitted on the SCell to be activated. In some embodiments, the interval between the repetition of the first signaling is determined by a timer. In some embodiment, the timer is started after the first signaling is transmitted. In these embodiments, if certain condition (s) is (are) met, the timer is terminated. If the timer expires, the UE transmits another first signaling.
  • whether the SCell activation triggered by the first signaling is supported depends on UE capability.
  • the gNB in response to the first signaling, transmits a second signal/signaling to the UE.
  • the second signaling is transmitted on the cell on which the first signaling is transmitted.
  • the second signaling is the feedback for receiving the first signaling.
  • the second signaling is a reference signal.
  • the second signaling is a reference signal.
  • the second signaling is a CSI-RS, a TRS, a PSS (primary synchronization signal) , an SSS (secondary synchronization signal) or an SSB.
  • the UE detects the second signaling in the SCell indicated by the first signaling. If the second signaling is detected, the SCell is activated.
  • the second signaling is a MAC CE.
  • the second signaling is a MAC CE for SCell activation/deactivation.
  • the second signaling is a DCI.
  • one or more bit fields in the second signaling may be used for indicating SCell activation related information.
  • the second signaling is configured to indicate SCell activation related information.
  • the SCell activation related information comprises at least one of:
  • a field of the acknowledgement information is used to indicate whether the SCell activation request in the first signaling is confirmed.
  • the acknowledgement information includes one or more bits.
  • each bit corresponds to one SCell or one SCell indicated by the first signaling.
  • the bit indicates whether the corresponding SCell will be/is to be activated. For example, in response to the SCell activation request in the first signaling, a bit ‘1’ in the acknowledgement information indicates that the corresponding SCell indicated by the first signaling will be/is to be activated; and the bit ‘0’ in the acknowledgement information indicates that the corresponding SCell indicated by the first signaling is not activated.
  • the acknowledgement information includes one or more bits.
  • each bit corresponds to one SCell or one SCell indicated by the first signaling.
  • the bit indicates whether the corresponding SCell will be/is to be activated and whether the TRS resource indicated by the first signaling is available.
  • the bit ‘1’ in the acknowledgement information indicates that the corresponding SCell indicated by the first signaling will be/is to be activated and the TRS resource indicated by the first signaling is available; and the bit ‘0’ in the acknowledgement information indicates that the corresponding SCell indicated by the first signaling is not activated and the TRS resource indicated by the first signaling is not available.
  • the acknowledgement information comprises one or more segments and each segment includes two bits.
  • each segment corresponds to one SCell or one SCell indicated by the first signaling.
  • One bit in one segment indicates whether the corresponding SCell will be/is to be activated and another bit indicates whether the corresponding TRS resource indicated by the first signaling is available.
  • the first bit in the segment being the bit ‘1’ indicates that the corresponding SCell indicated by the first signaling will be/is to be activated; and the first bit of the segment being the bit ‘0’ indicates that the corresponding SCell indicated by the first signaling is not activated.
  • the second bit of the segment being the bit ‘1’ indicates that the corresponding TRS resource indicated by the first signaling is available; and the second bit of the segment being the bit ‘0’ indicates that the corresponding TRS resource indicated by the first signaling is not available.
  • the second bit of the acknowledgement information will be ignored.
  • the second signaling comprises a carrier indicator to indicate which SCell will be activated.
  • the carrier indicator is in a form of bitmap.
  • Each bit (e.g., each sub-field) of the carrier indicator corresponds to an SCell index.
  • the bit (sub-field) is set to ‘1’ to indicate that the SCell corresponding to the bit (sub-field) will be/is to be activated.
  • the bit (sub-field) field is set to ‘0’ to indicate that the SCell corresponding to the bit (sub-field) is deactivated.
  • the carrier indicator is in a form of codepoint.
  • the carrier indicator comprises one or more bits for indicating SCell index (es) . When/If the SCell index (es) is(are) indicated, the SCell (s) with the indicated SCell index (es) is (are) activated.
  • the second signaling indicates whether one or more reference signals, e.g. CSI-RS burst/on-demand SSB/TRS for the SCell to be activated, in the SCell.
  • reference signals e.g. CSI-RS burst/on-demand SSB/TRS for the SCell to be activated
  • the second signaling indicates a resource or resource set of one or more reference signals, e.g. CSI-RS burst/on-demand SSB/TRS for the SCell to be activated, in the SCell.
  • reference signals e.g. CSI-RS burst/on-demand SSB/TRS for the SCell to be activated
  • the uplink signal indication indicates UE to transmit an uplink signal for example, a CSI report, an SRS or a preamble, on the SCell to be activated.
  • the UE only when the SCell indicated by the first signaling will be activated, the UE transmits the uplink signal.
  • the UE if the SCell activation related information is received, the UE performs at least one of the following on the SCell indicated by at least one of the first signaling or the second signaling: SRS transmissions on the SCell, PUCCH transmissions on the SCell (if configured) .
  • the UE detects/monitors the second signaling after transmitting the first signaling.
  • the transmission occasions of the second signaling starts after N symbols of the last/first symbol of the first signaling transmission occasion.
  • the UE detects the second signaling after N symbols from the last/first symbol of the first signaling transmission occasion, wherein N > 0.
  • the value of N is associated with at least one of the SCS configuration of the first signaling, the SCS configuration of the second signaling, the UE processing capability, or one or more fixed value configured by high layer parameter.
  • the transmission occasions of the second signaling starts after K slots of the slot of the first signaling transmitted.
  • the UE transmits the first signaling in a slot n (wherein n is an integer) and detects the second signaling in slot n+k, wherein the k is a number of slots and indicated by the first signaling or configured by high layer parameters (e.g., RRC parameters) , or predetermined.
  • the transmission occasions of the second signaling start from the N-th symbol in the slot n+k, wherein the slot n is the slot in which the first signal is transmitted, and N and k are positive integers.
  • the value of at least one of the N and k is associated with at least one of the SCS configuration of the first signaling, the SCS configuration of the second signaling, the UE processing capability, or one or more fixed values configured by high layer parameters.
  • a UE detects a second signaling during a window.
  • the window is associated with at least one of a start point, an end point, a duration.
  • the start point is determined by at least one of an offset between the start point and the start of the occasion of the first signaling, an offset between the start point and the end of the first signaling, an offset between the start point and a specific system frame number.
  • at least one of the offset for start point determination, the start point, the duration is configured by higher layer parameters.
  • the second signaling is carried by a DCI. In some embodiments, the second signaling is carried by a DCI format 1_0 with CRC scrambled by a corresponding RNTI. In some examples, the corresponding RNTI comprises at least one of C-RNTI, RA-RNTI, MsgB-RNTI or a specific RNTI.
  • the second signaling is a DCI format 1_0 with the CRC scrambled by C-RNTI and the "Frequency domain resource assignment" field are set to all ones.
  • a DCI format 1_0 with CRC scrambled by a RA-RNTI or a MsgB-RNTI is the feedback for receiving the first signaling.
  • a DCI format 1_0 with CRC scrambled by a RA-RNTI or a MsgB-RNTI is for indicating one or more SCell activation information.
  • the UE considers a DCI format 1_0 with CRC scrambled by a RA-RNTI or a MsgB-RNTI as indicating the SCell activation or as the feedback for the first signaling if certain conditions are met, wherein the conditions comprise at least one of: the Frequency domain resource assignment field is set to all ones, the Time domain resource assignment field is set to all ones, the Modulation and coding scheme field is set to all ones, the Frequency domain resource assignment field is set to all zeros, or the Time domain resource assignment field is set to all zeros.
  • a UE considers the DCI format 1_0 with CRC scrambled by a RA-RNTI or a MsgB-RNTI as indicating the SCell activation related information and as not scheduling a PDSCH reception, and interprets the bit fields of at least one of the Frequency domain resource assignment field, the Time domain resource assignment field, the VRB-to-PRB mapping field, the Modulation and coding scheme field, the TB scaling field, the LSBs of SFN field and the Reserved bits field.
  • the second signaling is carried by a sequence.
  • the SCell indicated by the first signaling will be activated.
  • the UE transmits one or more third signals on the SCell indicated to be activated.
  • the third signal is a reference signal or a preamble for TA acquisition or channel estimation.
  • the third signal is the feedback for the gNB.
  • the third signal is a reference signal.
  • the UE transmits an SRS burst, the SRS burst includes N1 SRS resources in one slot, where N1 is integer number larger than 0.
  • the UE transmits multiple SRS bursts.
  • the gap between the SRS bursts can be determined by high layer parameters.
  • the third signal is a preamble.
  • the specific UL signal are transmitted no early than K slots after the first signaling transmission, wherein K is determined by at least one of the SCS (sub-carrier spacing) of the SCell, the UE capability, or the high layer parameters.
  • K is determined by at least one of the SCS (sub-carrier spacing) of the SCell, the UE capability, or the high layer parameters.
  • the UE after transmitting the first signaling, performs at least one of:detecting the second signaling on the SCell indicated by the first signaling; detecting the DL signal on the SCell indicated by at least one of the first signaling or the second signaling; or transmitting the specific UL signal on the SCell indicated by at least one of the first signaling or the second signaling.
  • the UE detects the second signaling in the SCell that the first signaling indicated. If the second signaling is detected, UE performs at least one of the following: SRS transmissions on/for the SCell, CSI reporting for the SCell, PDCCH monitoring on the SCell, PDCCH monitoring for the SCell, PUCCH transmissions on the SCell (if configured) .
  • UE performs at least one of the following on/for the SCell indicated by at least one of the first signaling or the second signaling: CSI-RS detection, SSB detection, SRS transmissions on the SCell, CSI reporting for the SCell, PDCCH monitoring on the SCell, PDCCH monitoring for the SCell, PUCCH transmissions on the SCell (if configured) .
  • the second signaling is carried by a sequence. If the sequence is detected, UE performs at least one of the following on/for the SCell indicated by at least one of the first signaling or the second signaling: CSI-RS detection, SSB detection, SRS transmissions on the SCell, CSI reporting for the SCell, PDCCH monitoring on the SCell, PDCCH monitoring for the SCell, PUCCH transmissions on the SCell (if configured) .
  • the gNB detects a first signaling in first signaling transmission occasions.
  • the second signaling only transmitted when a first signaling is detected.
  • the gNB detects the third signal after transmitting the second signaling. If the third signal is detected, the DL signal (s) is transmitted on the SCell to be activated. If the third signal is not detected, the gNB re-transmits the second signaling to the UE.
  • the gNB detects the specific UL signal on the SCell to be activated after transmitting the second signaling. If the specific UL signal is detected, the SCell is activated.
  • FIG. 5 shows a schematic diagram of a network (architecture) according to an embodiment of the present disclosure.
  • the network (architecture) shown in FIG. 5 comprises a first node and a second node communicating with each other.
  • the first node is a BS (e.g., a gNB, a RAN node) and the second node is a UE.
  • BS e.g., a gNB, a RAN node
  • FIG. 6 relates to a schematic diagram of a wireless terminal 60 according to an embodiment of the present disclosure.
  • the wireless terminal 60 may be a user equipment (UE) , a mobile phone, a laptop, a tablet computer, an electronic book or a portable computer system and is not limited herein.
  • the wireless terminal 60 may include a processor 600 such as a microprocessor or Application Specific Integrated Circuit (ASIC) , a storage unit 610 and a communication unit 620.
  • the storage unit 610 may be any data storage device that stores a program code 612, which is accessed and executed by the processor 600.
  • Embodiments of the storage unit 610 include but are not limited to a subscriber identity module (SIM) , read-only memory (ROM) , flash memory, random-access memory (RAM) , hard-disk, and optical data storage device.
  • SIM subscriber identity module
  • ROM read-only memory
  • RAM random-access memory
  • the communication unit 620 may a transceiver and is used to transmit and receive signals (e.g., messages or packets) according to processing results of the processor 600. In an embodiment, the communication unit 620 transmits and receives the signals via at least one antenna 622 shown in FIG. 6.
  • the storage unit 610 and the program code 612 may be omitted and the processor 600 may include a storage unit with stored program code.
  • the processor 600 may implement any one of the steps in exemplified embodiments on the wireless terminal 60, e.g., by executing the program code 612.
  • the communication unit 620 may be a transceiver.
  • the communication unit 620 may as an alternative or in addition be combining a transmitting unit and a receiving unit configured to transmit and to receive, respectively, signals to and from a wireless network node (e.g., a base station) .
  • a wireless network node e.g., a base station
  • FIG. 7 relates to a schematic diagram of a wireless network node 70 according to an embodiment of the present disclosure.
  • the wireless network node 70 may be a satellite, a base station (BS) , a network entity, a Mobility Management Entity (MME) , Serving Gateway (S-GW) , Packet Data Network (PDN) Gateway (P-GW) , a radio access network (RAN) node, a next generation RAN (NG-RAN) node, a gNB, an eNB, a gNB central unit (gNB-CU) , a gNB distributed unit (gNB-DU) a data network, a core network or a Radio Network Controller (RNC) , and is not limited herein.
  • BS base station
  • MME Mobility Management Entity
  • S-GW Serving Gateway
  • PDN Packet Data Network Gateway
  • RAN radio access network
  • NG-RAN next generation RAN
  • gNB next generation RAN
  • gNB next generation RAN
  • the wireless network node 70 may comprise (perform) at least one network function such as an access and mobility management function (AMF) , a session management function (SMF) , a user place function (UPF) , a policy control function (PCF) , an application function (AF) , etc.
  • the wireless network node 70 may include a processor 700 such as a microprocessor or ASIC, a storage unit 710 and a communication unit 720.
  • the storage unit 710 may be any data storage device that stores a program code 712, which is accessed and executed by the processor 700. Examples of the storage unit 710 include but are not limited to a SIM, ROM, flash memory, RAM, hard-disk, and optical data storage device.
  • the communication unit 720 may be a transceiver and is used to transmit and receive signals (e.g., messages or packets) according to processing results of the processor 700.
  • the communication unit 720 transmits and receives the signals via at least one antenna 722 shown in FIG. 7.
  • the storage unit 710 and the program code 712 may be omitted.
  • the processor 700 may include a storage unit with stored program code.
  • the processor 700 may implement any steps described in exemplified embodiments on the wireless network node 70, e.g., via executing the program code 712.
  • the communication unit 720 may be a transceiver.
  • the communication unit 720 may as an alternative or in addition be combining a transmitting unit and a receiving unit configured to transmit and to receive, respectively, signals to and from a wireless terminal (e.g., a user equipment or another wireless network node) .
  • a wireless terminal e.g., a user equipment or another wireless network node
  • FIG. 8 shows a flowchart of a method according to an embodiment of the present disclosure.
  • the method shown in FIG. 8 may be used in a wireless terminal (e.g., UE, the second node in FIG. 5) and comprises the following step:
  • Step 801 Transmit, to a wireless network node, a first signal of activating SCell (s) .
  • the wireless terminal transmits a first signal of activating SCell (s) to a wireless network node (e.g., BS, RAN, RAN node) . That is the SCell activation may be triggered by the wireless terminal.
  • a wireless network node e.g., BS, RAN, RAN node
  • the first signal comprises at least one of: an SCell activation request, a DL signal indicator of one or more DL signals on the at least one SCell to be activated, or a UL signal transmission indicator of one or more UL signals for the at least one SCell to be activated.
  • the one or more DL signals comprises at least one of: a DRS, a CSI RS, a TRS or a SSB.
  • the one or more UL signals comprise at least one of: a CSI report, an SRS or a preamble.
  • the first signal is carried by a PUCCH or a sequence.
  • the PUCCH is in a PUCCH format 0.
  • a value for computing a cyclic shift (value) of sequences for the PUCCH format 0 is determined by information to be transmitted by the PUCCH format 0,
  • the PUCCH is in a PUCCH format 2/3/4. Furthermore, UCI bits of the PUCCH are arranged according to information carried by the PUCCH.
  • the sequence carrying the first signal is generated based on at least one of an SCell index, a root sequence index, an initialization seed or a sequence identifier.
  • the wireless terminal receives/monitors/detects a second signal in response to the first signal.
  • the second signal is carried by a PDCCH, a MAC CE, DL control information (DCI) or a sequence.
  • DCI DL control information
  • the DCI carrying the second signal is a DCI format 1_0 with CRC bits scrambled by one of a C-RNTI, a RA-RNTI, a MsgB RNTI or a specific RNTI configured by high layer parameter (s) .
  • the second signal comprises at least one of: acknowledgement information for the first signal, a carrier indicator of SCell (s) to be activated, a DL signal indication of one or more DL signal transmissions on the SCell (s) to be activated, or a UL transmission indicator of one or more UL signal transmissions on the SCell (s) to be activated.
  • the one or more DL signals comprise at least one of: a DRS, a CSI-RS, a TRS or a SSB.
  • the one or more UL signals comprise at least one of: a CSI report, an SRS or a preamble.
  • the second signal is a reference signal on the SCell (s) to be activated.
  • the second signal may be/comprise at least one of an SSB, a DRS, a CSI-RS or a TRS.
  • the wireless terminal transmits a third signal in response to a successful reception of the second signal to the wireless network node.
  • the wireless terminal detects/monitors the second signal after the transmission of the first signal.
  • the monitoring occasions of the second signal start from N symbols after the first (1st) symbol or the last symbol of a transmission occasion of the transmission of the first signal, wherein N is a positive integer.
  • the monitoring occasions of the second signal start from slot n+k, wherein slot n is the slot in which the first signal is transmitted and k is a positive integer.
  • the monitoring occasions of the second signal start from the N-th symbol in slot n+k, wherein the slot n is the slot in which the first signal is transmitted and N and k are positive integers.
  • the wireless terminal further transmits one or more UL signals on the SCell indicated by the first signal or the second signal.
  • the UL signal comprises at least one of: CSI report for the SCell, feedback for the wireless network node, or a reference signal or a preamble for TA acquisition or channel estimation.
  • FIG. 9 shows a flowchart of a method according to an embodiment of the present disclosure.
  • the method shown in FIG. 9 may be used in a wireless network node (e.g., BS, gNB, RAN, RAN node, the first node in FIG. 5) and comprises the following step:
  • a wireless network node e.g., BS, gNB, RAN, RAN node, the first node in FIG. 5
  • a wireless network node e.g., BS, gNB, RAN, RAN node, the first node in FIG. 5
  • Step 901 Receive, from a wireless terminal, a first signal of activating SCell (s) .
  • the wireless network node receives a first signal of activating SCell (s) from a wireless terminal (e.g., UE) .
  • the first signal comprises at least one of: an SCell activation request, a DL signal indicator of one or more DL signals on the at least one SCell to be activated, or a UL signal transmission indicator of one or more UL signals for the at least one SCell to be activated.
  • the one or more DL signals comprises at least one of: a DRS, a CSI RS, a TRS or a SSB.
  • the one or more UL signals comprise at least one of: a CSI report, an SRS or a preamble.
  • the first signal is carried by a PUCCH or a sequence.
  • the PUCCH is in a PUCCH format 0.
  • a value for computing a cyclic shift (value) of sequences for the PUCCH format 0 is determined by information to be transmitted by the PUCCH format 0,
  • the PUCCH is in a PUCCH format 2/3/4. Furthermore, UCI bits of the PUCCH are arranged according to information carried by the PUCCH.
  • the sequence carrying the first signal is generated based on at least one of an SCell index, a root sequence index, an initialization seed or a sequence identifier.
  • the wireless network node transmits a second signal in response to the first signal to the wireless terminal.
  • the second signal is carried by a PDCCH, a MAC CE, DL control information (DCI) or a sequence.
  • DCI DL control information
  • the DCI carrying the second signal is a DCI format 1_0 with CRC bits scrambled by one of a C-RNTI, a RA-RNTI, a MsgB RNTI or a specific RNTI configured by high layer parameter (s) .
  • the second signal comprises at least one of: acknowledgement information for the first signal, a carrier indicator of SCell (s) to be activated, a DL signal indication of one or more DL signal transmissions on the SCell (s) to be activated, or a UL transmission indicator of one or more UL signal transmissions on the SCell (s) to be activated.
  • the one or more DL signals comprise at least one of: a DRS, a CSI-RS, a TRS or a SSB.
  • the one or more UL signals comprise at least one of: a CSI report, an SRS or a preamble.
  • the second signal is a reference signal on the SCell (s) to be activated.
  • the second signal may be/comprise at least one of an SSB, a DRS, a CSI-RS or a TRS.
  • the wireless network node receives a third signal in response to a successful reception of the second signal from the wireless terminal.
  • the wireless network node transmits the second signal after the reception of the first signal.
  • transmission occasions of the second signal start from N symbols after the first (1st) or the last symbol of a transmission occasion of the transmission of the first signal, wherein N is a positive integer.
  • the transmission occasions of the second signal start from slot n+k, wherein slot n is the slot in which the first signal is transmitted and k is a positive integer.
  • the transmission occasions of the second signal start from the N-th symbol in slot n+k, wherein slot n is the slot in the first signal is transmitted and N and k are positive integers.
  • the wireless network node receives one or more UL signals on the SCell indicated by the first signal or the second signa from the wireless terminal.
  • the UL signal comprises at least one of: CSI report for the SCell, feedback for the wireless network node, or a reference signal or a preamble for TA acquisition or channel estimation.
  • FIG. 10 shows a flowchart of a method according to an embodiment of the present disclosure.
  • the method shown in FIG. 10 may be used in a wireless terminal (e.g., UE, the second node in FIG. 5) and comprises the following step:
  • Step 1001 Receive, from a wireless network node, a second signal of activating SCell (s) , wherein the second signal indicates at least one DL signal burst on the SCell (s) to be activated.
  • the wireless terminal receives a second signal of activating SCell (s) from a wireless network node.
  • the second signal further indicates at least one DL signal burst on the SCell (s) to be activated.
  • the DL signal comprises at least one of: SSB, a CSI RS, a TRS or a DRS.
  • each SCell to be activated (by the second signal) is an SSB-less SCell.
  • the SSB-less SCell refers to an SCell on which no SSB and/or no periodic TRS is transmitted when/if the SCell is activated.
  • the wireless terminal transmits a third signal based on the reception of the second signal to the wireless network node.
  • the wireless terminal transmits a specific UL signal to the wireless network node.
  • this UL signal comprises at least one of a CSI report, an SRS or a preamble.
  • FIG. 11 shows a flowchart of a method according to an embodiment of the present disclosure.
  • the method shown in FIG. 11 may be used in a wireless network node (e.g., BS, gNB, RAN, RAN node, the first node in FIG. 5) and comprises the following step:
  • a wireless network node e.g., BS, gNB, RAN, RAN node, the first node in FIG. 5
  • a wireless network node e.g., BS, gNB, RAN, RAN node, the first node in FIG. 5
  • Step 1101 Transmit, to a wireless terminal, a second signal of activating SCell (s) , wherein the second signal indicates at least one DL signal burst on the SCell (s) to be activated.
  • the wireless network node transmits a second signal of activating SCell (s) to a wireless terminal.
  • the second signal indicates at least one DL signal burst on the SCell (s) to be activated.
  • the DL signal comprises at least one of: SSB, a CSI RS, a TRS or a DRS.
  • each SCell to be activated (by the second signal) is an SSB-less SCell.
  • the SSB-less SCell refers to an SCell on which no SSB and/or no periodic TRS is transmitted when/if the SCell is activated.
  • the wireless network node receives a third signal in response to the second signal from the wireless terminal.
  • the wireless network node further transmits the at least one DL signal burst.
  • the wireless network node receives a specific UL signal from the wireless terminal.
  • this UL signal comprises at least one of a CSI report, an SRS or a preamble.
  • any reference to an element herein using a designation such as “first, “ “second, “ and so forth does not generally limit the quantity or order of those elements. Rather, these designations can be used herein as a convenient means of distinguishing between two or more elements or instances of an element. Thus, a reference to first and second elements does not mean that only two elements can be employed, or that the first element must precede the second element in some manner.
  • any one of the various illustrative logical blocks, units, processors, means, circuits, methods and functions described in connection with the aspects disclosed herein can be implemented by electronic hardware (e.g., a digital implementation, an analog implementation, or a combination of the two) , firmware, various forms of program or design code incorporating instructions (which can be referred to herein, for convenience, as "software” or a “software unit” ) , or any combination of these techniques.
  • a processor, device, component, circuit, structure, machine, unit, etc. can be configured to perform one or more of the functions described herein.
  • IC integrated circuit
  • DSP digital signal processor
  • ASIC application specific integrated circuit
  • FPGA field programmable gate array
  • the logical blocks, units, and circuits can further include antennas and/or transceivers to communicate with various components within the network or within the device.
  • a general purpose processor can be a microprocessor, but in the alternative, the processor can be any conventional processor, controller, or state machine.
  • a processor can also be implemented as a combination of computing devices, e.g., a combination of a DSP and a microprocessor, a plurality of microprocessors, one or more microprocessors in conjunction with a DSP core, or any other suitable configuration to perform the functions described herein. If implemented in software, the functions can be stored as one or more instructions or code on a computer-readable medium. Thus, the steps of a method or algorithm disclosed herein can be implemented as software stored on a computer-readable medium.
  • Computer-readable media includes both computer storage media and communication media including any medium that can be enabled to transfer a computer program or code from one place to another.
  • a storage media can be any available media that can be accessed by a computer.
  • such computer-readable media can include RAM, ROM, EEPROM, CD-ROM or other optical disk storage, magnetic disk storage or other magnetic storage devices, or any other medium that can be used to store desired program code in the form of instructions or data structures and that can be accessed by a computer.
  • unit refers to software, firmware, hardware, and any combination of these elements for performing the associated functions described herein. Additionally, for purpose of discussion, the various units are described as discrete units; however, as would be apparent to one of ordinary skill in the art, two or more units may be combined to form a single unit that performs the associated functions according to embodiments of the present disclosure.
  • memory or other storage may be employed in embodiments of the present disclosure.
  • memory or other storage may be employed in embodiments of the present disclosure.
  • any suitable distribution of functionality between different functional units, processing logic elements or domains may be used without detracting from the present disclosure.
  • functionality illustrated to be performed by separate processing logic elements, or controllers may be performed by the same processing logic element, or controller.
  • references to specific functional units are only references to a suitable means for providing the described functionality, rather than indicative of a strict logical or physical structure or organization.

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  • Mobile Radio Communication Systems (AREA)

Abstract

La présente divulgation porte sur un procédé de communication sans fil destiné à être utilisé dans un terminal sans fil. Le procédé consiste à transmettre, à un nœud de réseau sans fil, un premier signal d'activation d'au moins une cellule secondaire (SCell).
PCT/CN2023/122174 2023-09-27 2023-09-27 Procédé de communication sans fil et dispositif associé Pending WO2025065378A1 (fr)

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CN114828292A (zh) * 2018-01-04 2022-07-29 三星电子株式会社 半持久信道状态信息报告
WO2022205342A1 (fr) * 2021-04-01 2022-10-06 深圳传音控股股份有限公司 Procédé, dispositif et système d'activation de connexion, et support de stockage
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