WO2023283947A1 - Procédés et appareils pour des procédures d'ajout et de changement de cellule associées à un trp - Google Patents

Procédés et appareils pour des procédures d'ajout et de changement de cellule associées à un trp Download PDF

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Publication number
WO2023283947A1
WO2023283947A1 PCT/CN2021/106861 CN2021106861W WO2023283947A1 WO 2023283947 A1 WO2023283947 A1 WO 2023283947A1 CN 2021106861 W CN2021106861 W CN 2021106861W WO 2023283947 A1 WO2023283947 A1 WO 2023283947A1
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WO
WIPO (PCT)
Prior art keywords
cell
candidate
procedure
candidate cell
indication
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PCT/CN2021/106861
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English (en)
Inventor
Lianhai WU
Bingchao LIU
Mingzeng Dai
Le Yan
Congchi ZHANG
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Lenovo (Beijing) Limited
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Priority to PCT/CN2021/106861 priority Critical patent/WO2023283947A1/fr
Publication of WO2023283947A1 publication Critical patent/WO2023283947A1/fr

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    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W76/00—Connection management
    • H04W76/10—Connection setup
    • H04W76/15—Setup of multiple wireless link connections
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W74/00—Wireless channel access
    • H04W74/08—Non-scheduled access, e.g. ALOHA
    • H04W74/0833—Random access procedures, e.g. with 4-step access
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W76/00—Connection management
    • H04W76/10—Connection setup
    • H04W76/18—Management of setup rejection or failure

Definitions

  • Embodiments of the present application generally relate to wireless communication technology, especially to methods and apparatuses for a transmission reception point (TRP) related cell addition and switch procedures.
  • TRP transmission reception point
  • Scenario 1 refers to an inter-cell multi-TRP-like model
  • Scenario 2 refers to Layer1/Layer2 (L1/L2) mobility model (i.e., with a serving cell change)
  • L1/L2 Layer1/Layer2
  • Embodiments of the subject application aim to provide solutions for both Scenario 1 and Scenario 2 in which a user equipment (UE) is configured with two or more candidate cells to solve the related issues in these two scenarios.
  • UE user equipment
  • Some embodiments of the present application provide a method performed by a UE.
  • the method includes: receiving, from a serving cell, configuration information related to candidate cell (s) ; receiving an indication from the serving cell, wherein the indication is generated by a physical layer or a medium access control (MAC) layer of the serving cell, and the indication is: an activation indication for cell addition associated with a candidate cell within the candidate cell (s) ; or an activation indication for cell switch associated with the candidate cell; and in response to receiving the activation indication for cell addition, performing a cell addition procedure; or in response to receiving the activation indication for cell switch, performing a cell switch procedure.
  • MAC medium access control
  • the UE includes a processor and a wireless transceiver coupled to the processor; and the processor is configured: to receive, via the wireless transceiver from a serving cell, configuration information related to candidate cell (s) ; to receive, via the wireless transceiver, an indication from the serving cell, wherein the indication is generated by a physical layer or a MAC layer of the serving cell, and the indication is: an activation indication for cell addition associated with a candidate cell within the candidate cell (s) , or an activation indication for cell switch associated with the candidate cell; and to perform a cell addition procedure, in response to receiving the activation indication for cell addition; or to perform a cell switch procedure, in response to receiving the activation indication for cell switch.
  • Some embodiments of the present application provide a further method performed by a UE.
  • the further method includes: receiving, from a serving cell, configuration information related to candidate cell (s) , wherein the configuration information includes an addition condition or a switch condition configured for each candidate cell within the candidate cell (s) ; in response to receiving the configuration information, evaluating whether an addition condition or a switch condition configured for a candidate cell within the candidate cell (s) is met; and in response to meeting the addition condition configured for the candidate cell, performing a cell addition procedure; or in response to meeting the switch condition configured for the candidate cell, performing a cell switch procedure.
  • the UE includes a processor and a wireless transceiver coupled to the processor; and the processor is configured: to receive, via the wireless transceiver from a serving cell, configuration information related to candidate cell (s) , wherein the configuration information includes an addition condition or a switch condition configured for each candidate cell within the candidate cell (s) ; to evaluate whether an addition condition or a switch condition configured for a candidate cell within the candidate cell (s) is met, in response to receiving the configuration information; and to perform a cell addition procedure, in response to meeting the addition condition configured for the candidate cell; or to perform a cell switch procedure, in response to meeting the switch condition configured for the candidate cell.
  • Some embodiments of the present application also provide an apparatus for wireless communications.
  • the apparatus includes: a non-transitory computer-readable medium having stored thereon computer-executable instructions; a receiving circuitry; a transmitting circuitry; and a processor coupled to the non-transitory computer-readable medium, the receiving circuitry and the transmitting circuitry, wherein the computer-executable instructions cause the processor to implement any of the above-mentioned methods performed by a UE.
  • Some embodiments of the present application provide a method performed by a network device (e.g., a TRP or a base station (BS) ) .
  • the method includes: transmitting, to a UE, configuration information related to candidate cell (s) ; and transmitting, by a physical layer or a MAC layer of the network device, an indication to the UE, wherein the indication is: an activation indication for cell addition associated with a candidate cell within the candidate cell (s) ; or an activation indication for cell switch associated with the candidate cell.
  • Some embodiments of the present application also provide a network device (e.g., a TRP or a BS) .
  • the network device includes a processor and a wireless transceiver coupled to the processor; and the processor is configured: to transmit, via the wireless transceiver to a UE, configuration information related to candidate cell (s) ; and to transmit, by a physical layer or a MAC layer of the network device via the wireless transceiver, an indication to the UE, wherein the indication is: an activation indication for cell addition associated with a candidate cell within the candidate cell (s) ; or an activation indication for cell switch associated with the candidate cell.
  • Some embodiments of the present application provide a further method performed by a network device (e.g., a TRP or a BS) .
  • the further method includes: transmitting, to a UE, configuration information related to candidate cell (s) , wherein the configuration information includes an addition condition or a switch condition configured for each candidate cell within the candidate cell (s) ; and transmitting, to the UE, further configuration information related to the candidate cell (s) , wherein the further configuration information includes at least one of: synchronization signal block (s) (SSB (s) ) of the each candidate cell; and radio resource (s) for data transmission or data reception of the each candidate cell.
  • SSB synchronization signal block
  • Some embodiments of the present application also provide a network device (e.g., a TRP or a BS) .
  • the network device includes a processor and a wireless transceiver coupled to the processor; and the processor is configured: to transmit, via the wireless transceiver to a UE, configuration information related to candidate cell (s) , wherein the configuration information includes an addition condition or a switch condition configured for each candidate cell within the candidate cell (s) ; and to transmit, via the wireless transceiver to the UE, further configuration information related to the candidate cell (s) , wherein the further configuration information includes at least one of: SSB (s) of the each candidate cell; and radio resource (s) for data transmission or data reception of the each candidate cell.
  • Some embodiments of the present application also provide an apparatus for wireless communications.
  • the apparatus includes: a non-transitory computer-readable medium having stored thereon computer-executable instructions; a receiving circuitry; a transmitting circuitry; and a processor coupled to the non-transitory computer-readable medium, the receiving circuitry and the transmitting circuitry, wherein the computer-executable instructions cause the processor to implement any of the above-mentioned methods performed by a network device (e.g., a TRP or a BS) .
  • a network device e.g., a TRP or a BS
  • FIG. 1 illustrates scenarios on an inter-cell operation in accordance with some embodiments of the present application
  • FIG. 2 illustrates a flow chart of a method for performing a cell addition procedure or a cell switch procedure in accordance with some embodiments of the present application
  • FIG. 3 illustrates a flow chart of a method for transmitting an activation indication for cell addition or an activation indication for cell switch in accordance with some embodiments of the present application
  • FIG. 4 illustrates a further flow chart of a method for performing a cell addition procedure or a cell switch procedure in accordance with some embodiments of the present application
  • FIG. 5 illustrates a flow chart of a method for transmitting configuration information related to candidate cell (s) in accordance with some embodiments of the present application.
  • FIG. 6 illustrates an exemplary block diagram of an apparatus according to some embodiments of the present application.
  • FIG. 1 illustrates scenarios on an inter-cell operation in accordance with some embodiments of the present application.
  • a main difference between Scenario 1 and Scenario 1 is that UE1 in position B cannot receive signals from a serving cell (Cell A) .
  • Scenario 1 refers to an inter-cell multi-TRP-like model.
  • a UE receives, from a serving cell, configuration (s) of SSB (s) of a TRP with a different physical layer identifier (PCID) for a beam measurement and configuration (s) needed to use radio resources for data transmission or data reception including resources for the different PCID.
  • the UE performs a beam measurement for the TRP with the different PCID and reports a measurement result to the serving cell.
  • transmission configuration indicator (TCI) state (s) associated with the TRP with the different PCID is activated from the serving cell (by L1/L2 signalling) .
  • TCI transmission configuration indicator
  • a TCI may be a SSB or a channel state information reference signal (CSI-RS) .
  • the UE receives and transmits using a UE-dedicated channel on the TRP with the different PCID.
  • the UE should be in coverage of a serving cell always, also for a multi-TRP case, e.g., the UE should use common channels broadcast control channel (BCCH) , paging control channel (PCCH) , and etc., from the serving cell.
  • BCCH broadcast control channel
  • PCCH paging control channel
  • UE1 located in position A communicates with Cell A via TCI1 associated with TRP1.
  • Cell B having TCI2 associated with TRP2 is configured to UE1.
  • Cell A is the serving cell and Cell B is a secondary serving cell (i.e., a non-serving cell) .
  • a candidate cell can be noted as a secondary serving cell.
  • UE1 can receive data from Cell A and Cell B at the same time, since UE1 located in position A is in the coverage of both Cell A and Cell B.
  • UE1 is located in an area covered by Cell A (associated with PCID-1) and Cell B (associated with PCID-2) .
  • UE1 is served by TRP1 and TRP2.
  • CORESET pool#1 is configured for TRP1.
  • CORESET pool#2 is configured for TRP2.
  • UE1 could receive a dedicated physical downlink control channel (PDCCH) transmission or dedicated a physical downlink shared channel (PDSCH) transmission from TRP2 associated with the non-serving Cell B, while UE1 still receives system information from the serving Cell A.
  • UE1 could transmit a dedicated physical uplink control channel (PUCCH) transmission or a dedicated physical uplink share channel (PUSCH) transmission to TRP2, while UE1 still receives system information from the serving Cell A.
  • PUCCH dedicated physical downlink control channel
  • PUSCH dedicated physical uplink share channel
  • Scenario 2 refers to a L1/L2 mobility model (i.e., with a serving cell change) .
  • a UE receives, from a serving cell, configuration of SSBs of the cell with a different PCID for beam measurement or serving cell change.
  • the UE performs beam measurement for the cell with a different PCID and reports a measurement result to the serving cell.
  • Serving cell configuration for the cell with other PCID is provided to the UE by RRC signalling.
  • TCI state (s) for the cell with a different PCID is activated along with the serving cell change (by L1/L2 signalling) .
  • the UE changes the serving cell and starts receiving or starts transmitting using the pre-configured UE-dedicated channel and TCI states.
  • UE1 communicates with Cell A via TCI1 associated with TRP1.
  • Cell A configures UE1 to switch to Cell B having TCI3 associated with TRP2.
  • UE1 will release Cell A and can communicate with Cell B, since UE1 moves to position B in coverage of Cell B.
  • UE1 as shown in FIG. 1 may include computing devices, such as desktop computers, laptop computers, personal digital assistants (PDAs) , tablet computers, smart televisions (e.g., televisions connected to the Internet) , set-top boxes, game consoles, security systems (including security cameras) , vehicle on-board computers, network devices (e.g., TRPs, routers, switches, and modems) , or the like.
  • computing devices such as desktop computers, laptop computers, personal digital assistants (PDAs) , tablet computers, smart televisions (e.g., televisions connected to the Internet) , set-top boxes, game consoles, security systems (including security cameras) , vehicle on-board computers, network devices (e.g., TRPs, routers, switches, and modems) , or the like.
  • UE1 may include a portable wireless communication device, a smart phone, a cellular telephone, a flip phone, a device having a subscriber identity module, a personal computer, a selective call receiving circuitry, or any other device that is capable of sending and receiving communication signals on a wireless network.
  • UE1 may include wearable devices, such as smart watches, fitness bands, optical head-mounted displays, or the like.
  • UE1 may be referred to as a subscriber unit, a mobile, a mobile station, a user, a terminal, a mobile terminal, a wireless terminal, a fixed terminal, a subscriber station, a user terminal, or a device, or described using other terminology used in the art.
  • Embodiments of the present application introduce solutions for both Scenario 1 and Scenario 2, in which a UE is configured with two or more candidate cells.
  • some embodiments of the present application define a condition-evaluation trigger mechanism in Scenario 1 or Scenario 2.
  • Some embodiments of the present application introduce new trigger condition (s) to start a timer, which controls a cell addition or switch procedure.
  • a UE is configured with two or more candidate cells, in a case that the UE receives an indication within downlink control information (DCI) or a medium access control (MAC) control element (CE) to activate or switch to one configured candidate cell, or in a case that a UE activates or switches to one configured candidate cell based on the related condition-evaluation trigger mechanism, some embodiments of the present application introduce a new trigger condition to start a timer during these cases, and some further embodiments of the present application define the UE’s behavior in these two cases.
  • DCI downlink control information
  • CE medium access control element
  • some embodiments of the present application define the UE’s subsequent behavior (s) after the UE fails to access a candidate cell. If the UE fails to access the candidate cell after receiving an indication for activation or switching (or the condition-evaluation trigger mechanism) , some embodiments of the present application study how to handle the configuration of the candidate cells. For example, some embodiments introduce a mechanism regarding whether to release configuration of the corresponding candidate cell. If the UE successfully switches to the candidate cell, some embodiments of the present application introduce a mechanism regarding whether to release or keep configuration of other candidate cell (s) .
  • RA random access
  • a UE activates or switches to one configured candidate cell based on a condition-evaluation trigger mechanism, if two or more candidate cells meet the condition at the same time, some embodiments of the present application introduce a criteria for the candidate cell selection for a cell addition and switch procedure. More details regarding embodiments of the present application will be illustrated in the following text in combination with the appended drawings.
  • FIG. 2 illustrates a flow chart of a method for performing a cell addition procedure or a cell switch procedure in accordance with some embodiments of the present application.
  • the exemplary method 200 in the embodiments of FIG. 2 may be performed by a UE, e.g., UE1 as shown and illustrated in FIG. 1. Although described with respect to a UE, it should be understood that other device (s) may be configured to perform the method as shown and illustrated in FIG. 2. Specific examples of the embodiments of FIG. 2 are described in Embodiments 1-5 as below.
  • a UE receives configuration information related to candidate cell (s) from a serving cell.
  • the UE receives an indication from the serving cell.
  • the indication may be generated by a physical layer or a MAC layer of the serving cell.
  • the indication may be: an activation indication for cell addition associated with a candidate cell within the candidate cell (s) ; or an activation indication for cell switch associated with the candidate cell within the candidate cell (s) .
  • the UE in response to receiving the activation indication for cell addition in operation 202, may start a timer. In these embodiments, the UE may stop the timer upon successfully completing the RA procedure to the candidate cell. The UE may consider that the cell addition procedure is failed upon an expiry of the timer. The UE may stop the timer or re-start the timer upon receiving a further activation indication for cell addition and stopping the RA procedure to the candidate cell.
  • the UE may start a further timer.
  • the UE may stop the further timer upon successfully completing a RA procedure to the candidate cell.
  • the UE may consider that the cell switch procedure is failed upon an expiry of the further timer.
  • the UE may stop the further timer or re-start the further timer upon receiving the abovementioned another activation indication for cell switch and stopping the RA procedure to the candidate cell.
  • the UE may perform a cell addition procedure in response to receiving the activation indication for cell addition in operation 202.
  • the cell addition procedure further comprises starting a RA procedure to the candidate cell within the candidate cell (s) .
  • the UE may receive, from the serving cell during the RA procedure, a further activation indication for cell addition associated with a further candidate cell within the candidate cell (s) .
  • the further activation indication for cell addition may be generated by the physical layer or the MAC layer of the serving cell. For instance, in response to receiving the further activation indication for cell addition:
  • the UE may stop the RA procedure to the candidate cell, and start a further RA procedure to the further candidate cell;
  • the UE may continue to perform the RA procedure to the candidate cell, and start the further RA procedure to the further candidate cell after completing the RA procedure to the candidate cell.
  • the UE may perform a cell switch procedure in response to receiving the activation indication for cell switch in operation 202.
  • the cell switch procedure further comprises starting a RA procedure to the candidate cell within the candidate cell (s) .
  • the UE may receive, from the serving cell during the RA procedure, a further activation indication for cell switch associated with a further candidate cell within the candidate cell (s) .
  • the further indication activation for cell switch may be generated by the physical layer or the MAC layer of the serving cell.
  • the UE may transmit, by a physical layer or a MAC layer of the UE, failure information associated with the cell addition procedure or the cell switch procedure.
  • the failure information includes: a failure indication; an identifier (ID) of the candidate cell; and/or a failure type.
  • the failure type may indicate: a RA problem; a cell addition failure; or a cell switch failure.
  • the UE transmits the failure information to the serving cell via a MAC CE or a radio resource control (RRC) message.
  • the UE further receives, from the serving cell, a RRC message which includes reconfiguration information related to the candidate cell.
  • the UE may release the configuration information related to the candidate cell within the candidate cell (s) , or continue to store the configuration information related to the candidate cell within the candidate cell (s) .
  • the UE may release the configuration information related to the candidate cell, or release the configuration information related to all the candidate cell (s) .
  • FIG. 3 illustrates a flow chart of a method for transmitting an activation indication for cell addition or an activation indication for cell switch in accordance with some embodiments of the present application.
  • the exemplary method 300 in the embodiments of FIG. 3 may be performed by a network device, e.g., a TRP or a BS. Although described with respect to a network device, it should be understood that other device (s) may be configured to perform the method as shown and illustrated in FIG. 3. Specific examples of the embodiments of FIG. 3 are described in Embodiments 1-5 as below.
  • a network device transmits configuration information related to candidate cell (s) to a UE (e.g., UE1 as shown and illustrated in FIG. 1) .
  • the network device transmits, by a physical layer or a MAC layer of the network device, an indication to the UE.
  • the indication may be: an activation indication for cell addition associated with a candidate cell within the candidate cell (s) ; or an activation indication for cell switch associated with the candidate cell within the candidate cell (s) .
  • the network device transmits, by the physical layer or the MAC layer of the network device, a further activation indication for cell addition associated with a further candidate cell within the candidate cell (s) . In some further embodiments, the network device transmits, by the physical layer or the MAC layer of the network device, another activation indication for cell switch associated with another candidate cell within the candidate cell (s) .
  • the network device receives failure information associated with the candidate cell from the UE.
  • the failure information may be generated by the physical layer, the MAC layer, or a RRC layer of the UE.
  • the failure information is included in a MAC CE or a RRC message.
  • the failure information includes: a failure indication; an ID of the candidate cell; and/or a failure type.
  • the failure type may indicate: a RA problem; a cell addition failure; or a cell switch failure.
  • the RRC layer of the network device further indicates the failure information to the physical layer or the MAC layer of the network device. In some further embodiments, if the failure information is received by the physical layer or the MAC layer of the network device, the physical layer or the MAC layer of the network device further indicates the failure information to the RRC layer of the network device.
  • the network device transmits, to the UE, a RRC message which includes reconfiguration information related to the candidate cell.
  • FIG. 4 illustrates a further flow chart of a method for performing a cell addition procedure or a cell switch procedure in accordance with some embodiments of the present application.
  • the exemplary method 400 in the embodiments of FIG. 4 may be performed by a UE, e.g., UE1 as shown and illustrated in FIG. 1. Although described with respect to a UE, it should be understood that other device (s) may be configured to perform the method as shown and illustrated in FIG. 4. Specific examples of the embodiments of FIG. 4 are described in Embodiments 1-5 as below.
  • a UE receives configuration information related to candidate cell (s) from a serving cell.
  • the configuration information may include an addition condition or a switch condition configured for each candidate cell within the candidate cell (s) .
  • the UE in response to receiving the configuration information, the UE evaluates whether an addition condition or a switch condition configured for a candidate cell within the candidate cell (s) is met. In operation 403, the UE performs a cell addition procedure if the addition condition configured for the candidate cell is met; or the UE performs a cell switch procedure if the switch condition configured for the candidate cell is met.
  • the addition condition may comprise one of:
  • a maximum channel quality of all beams of a TRP of one candidate cell is an offset greater than a threshold.
  • Each beam of the TRP of each candidate cell may be identified by a CSI-RS or a synchronization signal block (SSB) .
  • SSB synchronization signal block
  • a maximum channel quality of all beams of the TRP of the one candidate cell is an offset greater than a threshold within a period.
  • An average channel quality of all suitable beams of the TRP of the one candidate cell is an offset greater than a further threshold.
  • Each suitable beam has a channel quality greater than a threshold.
  • An average channel quality of all suitable beams of the TRP of the one candidate cell is an offset greater than a further threshold within a further period.
  • the switch condition may comprise one of:
  • a maximum channel quality of all beams of a TRP of one candidate cell is an offset greater than a maximum channel quality of all beams of a TRP of the serving cell.
  • Each beam of the TRP of each candidate cell may be identified by a CSI-RS or a SSB.
  • a maximum channel quality of all beams of the TRP of the one candidate cell is an offset greater than the maximum channel quality of all beams of the TRP of the serving cell within a period.
  • An average channel quality of all suitable beams of the TRP of the one candidate cell is an offset greater than an average channel quality of all suitable beams of the TRP of the serving cell.
  • Each suitable beam has a channel quality greater than a threshold.
  • An average channel quality of all suitable beams of the TRP of the one candidate cell is an offset greater than the average channel quality of all suitable beams of the TRP of the serving cell within a further period.
  • the UE in response to simultaneously meeting addition conditions configured for two or more candidate cells within the candidate cell (s) , the UE may select one candidate cell from these two or more candidate cells, and perform the cell addition procedure to the selected one candidate cell.
  • the UE in response to simultaneously meeting switch conditions configured for two or more candidate cells within the candidate cell (s) , the UE may select one candidate cell from the two or more candidate cells, and perform the cell switch procedure to the selected one candidate cell.
  • the one candidate cell may be selected based on one of:
  • Each beam of the TRP of each candidate cell may be identified by a CSI-RS or a SSB.
  • the UE in response to performing the cell addition procedure to the selected one candidate cell, may transmit information of initiating the cell addition procedure to the serving cell. In this embodiment, during the cell addition procedure to the selected one candidate cell, the UE may receive an activation indication for cell addition associated with the selected one candidate cell. In response to receiving the activation indication for cell addition, the UE may ignore the activation indication for cell addition and continuing an ongoing RA procedure to the selected one candidate cell.
  • the UE may receive a further activation indication for cell addition associated with a further candidate cell.
  • the further activation indication for cell addition In response to receiving the further activation indication for cell addition:
  • the UE may ignore the further activation indication for cell addition and continuing an ongoing RA procedure to the selected one candidate cell;
  • the UE may stop the ongoing RA procedure to the selected one candidate cell and starting a RA procedure to the further candidate cell.
  • the UE may receive an activation indication for cell switch associated with the selected one candidate cell.
  • the UE may stop an ongoing RA procedure to the selected one candidate cell during the cell addition procedure and perform a cell switch procedure to the selected one candidate cell.
  • the UE may receive an activation indication for cell switch associated with the selected one candidate cell. In response to receiving the activation indication for cell switch, the UE may ignore the activation indication for cell switch and continuing an ongoing RA procedure to the selected one candidate cell.
  • the UE may receive a further activation indication for cell switch associated with a further candidate cell. In response to receiving the further activation indication for cell switch:
  • the UE may ignore the further activation indication for cell switch and continue an ongoing RA procedure to the selected one candidate cell;
  • the UE may stop the ongoing RA procedure to the selected one candidate cell and perform a cell switch procedure to the further candidate cell.
  • FIG. 5 illustrates a flow chart of a method for transmitting configuration information related to candidate cell (s) in accordance with some embodiments of the present application.
  • the exemplary method 500 in the embodiments of FIG. 5 may be performed by a network device, e.g., a TRP or a BS. Although described with respect to a network device, it should be understood that other device (s) may be configured to perform the method as shown and illustrated in FIG. 5. Specific examples of the embodiments of FIG. 5 are described in Embodiments 1-5 as below.
  • a network device e.g., TRP1 or TRP2 as shown and illustrated in FIG. 1 transmits configuration information related to candidate cell (s) to a UE (e.g., UE1 as shown and illustrated in FIG. 1) .
  • the configuration information may include an addition condition or a switch condition configured for each candidate cell within the candidate cell (s) .
  • the addition condition configured for each candidate cell includes at least one of:
  • a maximum channel quality of all beams of a TRP of each candidate cell is an offset greater than a threshold.
  • Each beam of the TRP of each candidate cell may be identified by a CSI-RS or a SSB.
  • a maximum channel quality of all beams of the TRP of each candidate cell is an offset greater than the threshold within a period.
  • An average channel quality of all suitable beams of the TRP of each candidate cell is an offset greater than a further threshold.
  • Each suitable beam has a channel quality greater than a threshold.
  • An average channel quality of all suitable beams of the TRP of each candidate cell is an offset greater than the further threshold with in a further period.
  • the switch condition configured for each candidate cell includes at least one of:
  • a maximum channel quality of all beams of a TRP of each candidate cell is an offset greater than a maximum channel quality of all beams of a TRP of the serving cell.
  • Each beam of the TRP of each candidate cell may be identified by a CSI-RS or a SSB.
  • a maximum channel quality of all beams of the TRP of each candidate cell is an offset greater than a maximum channel quality of all beams of the TRP of the serving cell within a period.
  • An average channel quality of all suitable beams of the TRP of each candidate cell is an offset greater than an average channel quality of all suitable beams of the TRP of the serving cell.
  • Each suitable beam has a channel quality greater than a threshold.
  • An average channel quality of all suitable beams of the TRP of each candidate cell is an offset greater than the average channel quality of all suitable beams of the TRP of the serving cell with in a further period.
  • the network device transmits further configuration information related to the candidate cell (s) to the UE.
  • the further configuration information may include: SSB (s) of each candidate cell; radio resource (s) for data transmission of each candidate cell; and/or radio resource (s) for data reception of each candidate cell.
  • the network device receives, from the UE, information of initiating a cell addition procedure to a candidate cell within the candidate cell (s) .
  • a UE and a TRP may perform following operations.
  • the UE may be UE1 as shown and illustrated in FIG. 1.
  • the TRP may be TRP1 or TRP2 as shown and illustrated in FIG. 1.
  • Embodiment 1 this embodiment refers to a successful cell addition procedure based on L1/L2 indication for Scenario 1.
  • Step 1 A UE accesses a serving cell, e.g., Cell A as shown in FIG. 1.
  • Cell A may be a PCell.
  • the serving cell e.g., a PCell
  • transmits configuration information e.g., a measurement report
  • Step 2 The UE reports measurement result (s) including neighbor cell (s) to the serving cell via RRC signalling.
  • Step 3 The serving cell transmits configuration information associated with candidate cell (s) (e.g., a candidate SCell) which at least includes SSB (s) of each TRP and radio resources for data transmission or data reception.
  • candidate cell e.g., a candidate SCell
  • SSB SSB
  • CORESET pool#1 is configured for TRP1 as shown in FIG. 1.
  • the candidate cell (s) has a different PCID from that of the serving cell.
  • Step 4 The UE receives configuration information for the candidate cell (s) from the serving cell.
  • Step 5 The UE reports a measurement result to the serving cell.
  • the - Layer 1 measurement result report may be based on an event trigger.
  • the maximum channel quality of one RS in the RS set of a candidate TRP e.g., TRP2 as shown in FIG. 1 is greater than one configured threshold.
  • the maximum channel quality of one RS in the RS set of the candidate TRP is greater than one configured threshold within a certain period.
  • the serving cell may transmit an activation indication to activate TCI state (s) associated with the TRP (e.g., TRP2 as shown in FIG. 1) via a physical layer and a MAC layer based on the measurement report.
  • TCI state s
  • TRP2 e.g., TRP2 as shown in FIG. 1
  • the activation indication is used to configure the UE to add the TRP (e.g., TRP2 as shown in FIG. 1) in the candidate cell.
  • TRP e.g., TRP2 as shown in FIG. 1
  • Step 7 The UE accesses the candidate cell (e.g., Cell B as shown in FIG. 1) .
  • the UE may continue to access the serving cell (e.g., Cell A as shown in FIG. 1) .
  • the UE may not start a timer to control the accessing procedure to the candidate cell.
  • the UE may start a timer associated with the TRP (e.g., TRP2 as shown in FIG. 1) or the cell addition procedure to the candidate cell.
  • Step 7 there may be following two optional steps, i.e., Step 8 and Step 8’, in different cases.
  • Step 8 After successfully accessing the candidate cell, the UE may transmit a message to the secondary cell (e.g., Cell B) , to indicate a successful connection.
  • the secondary cell e.g., Cell B
  • the UE may receive an activation indication associated with a further candidate cell during the RA procedure to the candidate cell.
  • the UE can stop the RA procedure to the candidate cell and start a RA procedure for the further candidate cell.
  • Stopping the RA procedure to the candidate cell implies “stopping the timer associated with the cell addition procedure to the candidate cell” or “re-starting the timer” .
  • the UE may continue to perform the RA procedure to the candidate cell. After completing the RA procedure to the candidate cell, the UE can perform a RA procedure for the further candidate cell. Or, the UE’s behaviors depend upon specific implementations.
  • Embodiment 2 this embodiment refers to a successful cell addition procedure based on a condition-evaluation trigger mechanism for Scenario 1.
  • Step 1 A UE accesses a serving cell, e.g., Cell A as shown in FIG. 1 (e.g., a PCell) .
  • the serving cell e.g., PCell
  • transmits the configuration e.g., a measurement report
  • Step 2 The UE reports measurement result (s) including neighbor cell (s) to the serving cell via RRC signalling.
  • Step 3 The serving cell transmits configuration information associated with the candidate cell (s) (e.g., a candidate SCell) which at least includes SSB (s) of each TRP and radio resources for data transmission or data reception.
  • the candidate cell e.g., a candidate SCell
  • SSB SSB
  • CORESET pool#1 is configured for TRP1 as shown in FIG. 1.
  • the candidate cell has the different PCID from that of the serving cell.
  • condition-evaluation trigger mechanism the condition can be as follows:
  • the maximum channel quality of one RS in the RS set of the candidate TRP is greater than one configured threshold.
  • the maximum channel quality of one RS in the RS set of the candidate TRP is greater than one configured threshold within a certain period.
  • the average channel quality of all suitable RS (s) in the RS set of the candidate TRP is greater than one configured threshold.
  • the channel quality of a RS with greater than one configured threshold is considered as suitable.
  • the average channel quality of all suitable RS (s) in the RS set of the candidate TRP is greater than one configured threshold within a certain period.
  • the channel quality of a RS with greater than one configured threshold is considered as suitable.
  • the above condition may be used to determine if the UE needs to add the candidate cell.
  • Step 4 The UE receives configuration information for candidate cell (s) from the serving cell.
  • the UE starts to evaluate the condition for each candidate cell to check if the condition is met.
  • Step 5 The UE reports measurement result (s) to the serving cell.
  • the - Layer 1 measurement result report may be based on an event trigger.
  • the maximum channel quality of one RS in the RS set of the candidate TRP e.g., TRP2 as shown in FIG. 1 is greater than one configured threshold.
  • the maximum channel quality of one RS in the RS set of the candidate TRP is greater than one configured threshold within a certain period.
  • Step 6 The UE accesses the candidate cell when at least one candidate cell can meet the condition.
  • a RA procedure is not needed, e.g., in an intra-DU case, the UE does not start one timer to control the accessing procedure.
  • the UE starts the timer associated with the TRP or a cell addition procedure upon receiving the activation indication.
  • ⁇ Option 1 the UE selects one cell based on the maximum channel quality of all beams associated with the certain TRP.
  • ⁇ Option 2 the UE selects one cell based on the average channel quality of all suitable beam associated with the certain TRP.
  • a suitable beam means the channel quality of one beam is greater than the configured threshold.
  • the UE may transmit the indication to inform the serving cell when the UE initiates the cell addition procedure.
  • Step 6 there may be following three optional steps, i.e., Step 7, Step 7’, and Step 7”, in different cases.
  • Step 7 After successfully accessing the candidate cell, the UE transmits the message to the network to indicate successful connection.
  • Step 7 The UE receives the activation indication associated with a further candidate cell during the accessing procedure to the candidate cell in Step 6.
  • the UE can stop the RA procedure to the candidate cell and start a RA procedure to the further candidate cell.
  • Stopping the RA procedure to the candidate cell implies “stopping the timer associated with the cell addition procedure to the candidate cell” or “re-starting the timer” .
  • the UE continues to perform the RA procedure to the candidate cell. After completing the RA procedure to the candidate cell, the UE can perform a RA procedure for the further candidate cell. Or, the UE’s behaviors depend upon specific implementations.
  • Step 7 The UE receives the activation indication associated with the same candidate cell, which condition is met.
  • the UE ignores the received activation indication and continues the ongoing RA procedure to the candidate cell.
  • Step 8 After successfully accessing the candidate cell, the UE stops the timer if the timer is running.
  • the UE transmits a message to the network to indicate a successful connection.
  • Embodiment 3 this embodiment refers to a failed cell addition procedure based on an L1/L2 indication and a condition-evaluation trigger mechanism for Scenario 1.
  • Step 1 A UE accesses a serving cell, e.g., Cell A as shown in FIG. 1 (e.g., a PCell) .
  • the serving cell e.g., PCell
  • transmits the configuration e.g., a measurement report
  • Step 2 The UE reports measurement result (s) including neighbor cell (s) to the serving cell.
  • Step 3 The serving cell transmits the configuration associated with the candidate cell (s) , which at least includes SSB (s) of each TRP and radio resources for data transmission or data reception.
  • CORESET pool#1 is configured for TRP1 as shown in FIG. 1.
  • the candidate cell has the different PCID from that of the serving cell.
  • condition-evaluation trigger mechanism assumes that each TRP has an associated RS set.
  • condition-evaluation trigger mechanism the condition can be as follows.
  • the maximum channel quality of one RS in the RS set of the candidate TRP is greater than one configured threshold.
  • the maximum channel quality of one RS in the RS set of the candidate TRP is greater than one configured threshold within a certain period.
  • the average channel quality of all suitable RS (s) in the RS set of the candidate TRP is greater than one configured threshold.
  • the channel quality of a RS with greater than one configured threshold is considered as suitable.
  • the average channel quality of all suitable RS (s) in the RS set of the candidate TRP is greater than one configured threshold within a certain period.
  • the channel quality of a RS with greater than one configured threshold is considered as suitable.
  • the above condition is used to determine if the UE needs to add the candidate cell.
  • Step 4 The UE receives the configuration for candidate cell (s) from the serving cell.
  • Step 5 The UE reports measurement result (s) to the serving cell.
  • the - Layer 1 measurement result report may be based on an event trigger. For instance, the maximum channel quality of one RS in the RS set of the candidate TRP (e.g., TRP2 as shown in FIG. 1) is greater than one configured threshold. Or, the maximum channel quality of one RS in the RS set of the candidate TRP is greater than one configured threshold within a certain period.
  • the maximum channel quality of one RS in the RS set of the candidate TRP is greater than one configured threshold within a certain period.
  • Step 5 there may be following two optional steps, i.e., Step 6 and Step 6’, in different cases.
  • the serving cell may transmit the activation indication to activate TCI state (s) associated with the TRP via a physical layer and a MAC layer based on the measurement report.
  • the activation indication is used to configure the UE to add the TRP in the candidate cell.
  • Step 7 The UE accesses the candidate cell.
  • a RA procedure is not needed, e.g., in an intra-DU case, the UE does not start one timer to control the accessing procedure.
  • the UE starts the timer upon receiving the activation indication.
  • Step 8 The UE fails to access the candidate cell, e.g., the timer expires. Then, the UE may perform any or a combination of following steps:
  • the UE may report the failure information to the serving cell via a physical layer or a MAC layer. If a MAC CE is used, a MAC CE may include failure indication and/or the related candidate cell ID. In addition, one dedicated LCID is reserved. After a lower layer of the serving cell receives the failure indication from the UE, the lower layer will indicate the failure information to an upper layer of the serving cell, e.g., a RRC layer. Then, the RRC layer may reconfigure the corresponding cell.
  • the UE may report the failure information to the serving cell via RRC message.
  • the RRC message may include a failure type (e.g., a RA problem, a cell addition failure, or a cell switch failure) . Then, the UE needs to indicate the failure information of the RRC layer to a lower layer.
  • the failure information includes a failed cell list.
  • the information associated with the failed cell list can be accommodated in one RRC message. Then, a time stamp for a failure of one certain cell may be added.
  • the UE may release the configuration associated with failed cell.
  • the UE may continue to store the configuration associated with failed cell.
  • Embodiment 4 this embodiment refers to a successful cell switch procedure based on an L1/L2 indication and a condition-evaluation trigger mechanism for Scenario 2.
  • Step 1 A UE accesses a serving cell, e.g., Cell A as shown in FIG. 1 (e.g., a PCell) .
  • the serving cell e.g., PCell
  • transmits the configuration e.g., a measurement report
  • Step 2 The UE reports measurement result (s) including neighbor cell (s) to the serving cell.
  • Step 3 The serving cell transmits the configuration associated with the candidate cell (s) (e.g., a PCell or a PSCell) , which at least includes SSB (s) of each TRP and radio resources for data transmission or data reception.
  • the candidate cell e.g., a PCell or a PSCell
  • SSB SSB
  • CORESET pool#1 is configured for TRP1 as shown in FIG. 1.
  • the candidate cell has the different PCID from that of the serving cell.
  • condition-evaluation trigger mechanism assumes that each TRP has an associated RS set.
  • condition-evaluation trigger mechanism the condition can be as follows:
  • the maximum channel quality of one RS in the RS set of the candidate TRP is (offset) greater than the maximum channel quality of one RS in the RS set of serving TRP.
  • the maximum channel quality of one RS in the RS set of the candidate TRP is (offset) greater than the maximum channel quality of one RS in the RS set of serving TRP within a certain period.
  • the average channel quality of all suitable RS (s) in the RS set of candidate TRP is (offset) greater than the average channel quality of all suitable RS (s) in the RS set of serving TRP.
  • the channel quality of a RS with greater than one configured threshold is considered as suitable.
  • the average channel quality of all suitable RS (s) in the RS set of the candidate TRP is (offset) greater than the average channel quality of all suitable RS (s) in the RS set of serving TRP within a certain period.
  • the channel quality of a RS with greater than one configured threshold is considered as suitable.
  • Step 4 The UE receives the configuration for candidate cell (s) from the serving cell.
  • Step 5 The UE reports measurement result (s) to the serving cell.
  • the - Layer 1 measurement result report may be based on event trigger. For example, the maximum channel quality of one RS in the RS set of a TRP is greater than one configured threshold. Or, the maximum channel quality of one RS in the RS set of the TRP is greater than one configured threshold within a certain period.
  • Step 5 there may be following two optional steps, i.e., Step 6 and Step 6’, in different cases.
  • the serving cell may transmit a switching indication via a physical layer and a MAC layer based on the measurement report.
  • the switching indication is used to command the UE to switch to the candidate cell.
  • Step 7 The UE may release the source cell when the UE performs the cell switch procedure.
  • Step 8 The UE accesses the candidate cell.
  • a RA procedure is not needed, e.g., in an intra-DU case, the UE does not start one timer to control the accessing procedure.
  • the UE starts the timer upon receiving the activation indication.
  • Step 9 After Step 8, there may be following three optional steps, i.e., Step 9, Step 9’ and Step 9”, in different cases.
  • Step 9 After successfully accessing the candidate cell, the UE transmits the message to the secondary cell to indicate successful connection.
  • Step 9 The UE receives the switching indication associated with a further candidate cell during the accessing procedure in Step 8.
  • the UE can stop the RA procedure to the candidate cell and start a RA procedure for the further candidate cell.
  • Stopping the RA procedure to the candidate cell implies ‘stopping the timer’ or “re-starting the timer” .
  • the UE If two or more candidate cells can be activated, the UE continue to perform the RA procedure to the candidate cell. After completing the RA procedure to the candidate cell, the UE can perform a RA procedure for the further candidate cell. Or, the UE’s behaviors depend upon specific implementations.
  • Step 9 The UE receives the switching indication associated with the same candidate cell, which condition is met.
  • the UE may ignore the received switching indication and continue the ongoing RA procedure to the candidate cell.
  • Embodiment 5 this embodiment refers to a failed cell switch procedure based on an L1/L2 indication and a condition-evaluation trigger mechanism for Scenario 1.
  • Step 1 A UE accesses a serving cell, e.g., Cell A as shown in FIG. 1 (e.g., a PCell) .
  • the serving cell e.g., PCell
  • transmits the configuration e.g., a measurement report
  • Step 2 The UE reports measurement result (s) including neighbor cell (s) to the serving cell.
  • Step 3 The serving cell transmits the configuration associated with the candidate cell (s) (e.g., a PCell or a PSCell) , which at least includes SSB (s) of each TRP and radio resources for data transmission or data reception.
  • the candidate cell e.g., a PCell or a PSCell
  • SSB SSB
  • CORESET pool#1 is configured for TRP1 as shown in FIG. 1.
  • the candidate cell has a different PCID from that of the serving cell.
  • condition-evaluation trigger mechanism assumes that each TRP has an associated RS set.
  • condition-evaluation trigger mechanism the condition can be as follows:
  • the maximum channel quality of one RS in the RS set of the candidate TRP is (offset) greater than the maximum channel quality of one RS in the RS set of the serving TRP (e.g., TRP1 as shown in FIG. 1) .
  • the maximum channel quality of one RS in the RS set of the candidate TRP is (offset) greater than the maximum channel quality of one RS in the RS set of the serving TRP within a certain period.
  • the average channel quality of all suitable RS (s) in the RS set of the candidate TRP is (offset) greater than the average channel quality of all suitable RS (s) in the RS set of serving TRP.
  • the channel quality of a RS with greater than one configured threshold is considered as suitable.
  • the average channel quality of all suitable RS (s) in the RS set of the candidate TRP is (offset) greater than the average channel quality of all suitable RS (s) in the RS set of serving TRP within a certain period.
  • the channel quality of a RS with greater than one configured threshold is considered as suitable.
  • the above condition is used to determine if UE needs to add the candidate cell.
  • Step 4 The UE receives the configuration for candidate cell (s) from the serving cell.
  • Step 5 The UE reports measurement result to the serving cell.
  • the - Layer 1 measurement result report may be based on an event trigger. For example, the maximum channel quality of one RS in the RS set of the candidate TRP is greater than one configured threshold. Or, the maximum channel quality of one RS in the RS set of the candidate TRP is greater than one configured threshold within a certain period.
  • Step 5 there may be following two optional steps, i.e., Step 6 and Step 6’, in different cases.
  • the serving cell may transmit the switching indication via physical layer and MAC layer based on the measurement report.
  • the switching indication is used to command the UE to switch to the candidate cell.
  • Step 6 The condition of one candidate cell is met (for a condition-evaluation trigger mechanism) .
  • Step 7 The UE accesses the candidate cell.
  • the UE does not start one timer to control the accessing procedure to the candidate cell.
  • the UE starts the timer upon receiving the activation indication.
  • Step 8 The UE fails to access the candidate cell, e.g., the timer expires.
  • Step 9 The UE performs a re-establishment procedure after selecting one suitable cell. Alternatively, if the UE has not released the source cell and the source cell is available, the UE fallback to the source cell. Then, the UE reports the failure information to the re-established cell or the source cell.
  • the UE reports the failure information to the re-established cell or the source cell via a physical layer or a MAC layer.
  • the MAC CE may include failure indication and/or the related candidate cell ID.
  • one dedicated logical channel ID (LCID) is reserved.
  • the UE reports the failure information to the serving cell via a RRC message.
  • the RRC message includes a failure type (e.g., a RA problem, a cell addition failure, or a cell switch failure) .
  • the RRC layer of the serving cell needs to indicate the failure information to a lower layer of the serving cell.
  • the UE may release the configuration associated with the candidate cell.
  • the UE may release the configuration associated with the candidate cell
  • the UE may keep the configuration associated with the candidate cell. This step is preferred in some embodiments.
  • FIG. 6 illustrates an exemplary block diagram of an apparatus according to some embodiments of the present application.
  • the apparatus 600 may include at least one processor 604 and at least one transceiver 602 coupled to the processor 604.
  • the apparatus 600 may be a UE or a network device (e.g., a TRP or a BS) .
  • the transceiver 602 may be divided into two devices, such as a receiving circuitry and a transmitting circuitry.
  • the apparatus 600 may further include an input device, a memory, and/or other components.
  • the apparatus 600 may be a UE.
  • the transceiver 602 in the UE may be configured to receive configuration information related to candidate cell (s) from a serving cell, and to receive an indication from the serving cell.
  • the indication is generated by a physical layer or a MAC layer of the serving cell.
  • the indication may be: an activation indication for cell addition associated with a candidate cell within the candidate cell (s) ; or an activation indication for cell switch associated with the candidate cell.
  • the processor 604 may be configured to perform a cell addition procedure in response to receiving the activation indication for cell addition, or to perform a cell switch procedure in response to receiving the activation indication for cell switch.
  • the apparatus 600 may be a network device (e.g., a TRP or a BS) .
  • the transceiver 602 in the network device may be configured to transmit configuration information related to candidate cell (s) to a UE, to transmit, by a physical layer or a MAC layer of the network device via the wireless transceiver, an indication to the UE.
  • the indication may be: an activation indication for cell addition associated with a candidate cell within the candidate cell (s) ; or an activation indication for cell switch associated with the candidate cell.
  • the apparatus 600 may be a UE.
  • the transceiver 602 in the UE may be configured to receive configuration information related to candidate cell (s) from a serving cell.
  • the configuration information includes an addition condition or a switch condition configured for each candidate cell within the candidate cell (s) .
  • the processor 604 may be configured to evaluate whether an addition condition or a switch condition configured for a candidate cell within the candidate cell (s) is met, in response to receiving the configuration information.
  • the processor 604 may be further configured to perform a cell addition procedure in response to meeting the addition condition configured for the candidate cell, or to perform a cell switch procedure in response to meeting the switch condition configured for the candidate cell.
  • the apparatus 600 may be a network device (e.g., a TRP or a BS) .
  • the transceiver 602 in the network device may be configured to transmit configuration information related to candidate cell (s) to a UE.
  • the configuration information includes an addition condition or a switch condition configured for each candidate cell within the candidate cell (s) .
  • the transceiver 602 in the network device may be configured to transmit further configuration information related to the candidate cell (s) to the UE.
  • the further configuration information includes at least one of: SSB (s) of the each candidate cell; radio resource (s) for data transmission of the each candidate cell; and radio resource (s) for data reception of the each candidate cell.
  • the apparatus 600 may further include at least one non-transitory computer-readable medium.
  • the non-transitory computer-readable medium may have stored thereon computer-executable instructions to cause a processor to implement the method with respect to a UE or a network device (e.g., a TRP or a BS) as described above.
  • the computer-executable instructions when executed, cause the processor 604 interacting with transceiver 602, so as to perform operations of the methods, e.g., as described in view of any of FIGS. 2-5.
  • the terms “includes, “ “including, “ or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that includes a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such process, method, article, or apparatus.
  • An element proceeded by “a, “ “an, “ or the like does not, without more constraints, preclude the existence of additional identical elements in the process, method, article, or apparatus that includes the element.
  • the term “another” is defined as at least a second or more.
  • the term “having” and the like, as used herein, are defined as "including.

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Abstract

Selon des modes de réalisation, la présente invention concerne des procédés et des appareils pour des procédures d'ajout et de changement de cellules associées à un point de réception de transmission (TRP) dans un système 5G 3GPP (projet de partenariat de 3e génération) ou similaire. Selon un mode de réalisation de la présente invention, un procédé peut être effectué par un équipement d'utilisateur (UE) et comprendre les étapes suivantes : recevoir, d'une cellule de desserte, des informations de configuration concernant une ou des cellules candidates ; recevoir une indication de la cellule de desserte, l'indication étant produite par une couche physique ou une couche de contrôle d'accès au support (MAC) de la cellule de desserte, et l'indication étant : une indication d'activation pour l'ajout de cellule associée à une cellule candidate dans la ou les cellules candidates, ou une indication d'activation pour un changement de cellule associé à la cellule candidate ; et en réponse à la réception de l'indication d'activation pour l'ajout de cellule, effectuer une procédure d'ajout de cellule, ou en réponse à la réception de l'indication d'activation pour un changement de cellule, effectuer une procédure de changement de cellule. Après l'échec de l'accès de l'UE à la cellule candidate ou la réussite de l'accès de l'UE à la cellule candidate, l'UE peut libérer la configuration correspondante de la cellule candidate.
PCT/CN2021/106861 2021-07-16 2021-07-16 Procédés et appareils pour des procédures d'ajout et de changement de cellule associées à un trp WO2023283947A1 (fr)

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Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20210195493A1 (en) * 2019-12-23 2021-06-24 Qualcomm Incorporated User equipment (ue) requested enablement for l1/l2 inter-cell mobility
WO2021127582A2 (fr) * 2019-12-20 2021-06-24 Qualcomm Incorporated Techniques de signalisation et de mobilité entre cellules
US20210212091A1 (en) * 2019-12-20 2021-07-08 Qualcomm Incorporated Signaling of multiple candidate cells for l1/l2-centric inter-cell mobility
US20210219199A1 (en) * 2020-01-10 2021-07-15 Qualcomm Incorporated L1/l2 based cell selection

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2021127582A2 (fr) * 2019-12-20 2021-06-24 Qualcomm Incorporated Techniques de signalisation et de mobilité entre cellules
US20210212091A1 (en) * 2019-12-20 2021-07-08 Qualcomm Incorporated Signaling of multiple candidate cells for l1/l2-centric inter-cell mobility
US20210195493A1 (en) * 2019-12-23 2021-06-24 Qualcomm Incorporated User equipment (ue) requested enablement for l1/l2 inter-cell mobility
US20210219199A1 (en) * 2020-01-10 2021-07-15 Qualcomm Incorporated L1/l2 based cell selection

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