WO2023036120A1 - 由用户设备执行的方法及用户设备 - Google Patents

由用户设备执行的方法及用户设备 Download PDF

Info

Publication number
WO2023036120A1
WO2023036120A1 PCT/CN2022/117224 CN2022117224W WO2023036120A1 WO 2023036120 A1 WO2023036120 A1 WO 2023036120A1 CN 2022117224 W CN2022117224 W CN 2022117224W WO 2023036120 A1 WO2023036120 A1 WO 2023036120A1
Authority
WO
WIPO (PCT)
Prior art keywords
scg
random access
user equipment
activation
activating
Prior art date
Application number
PCT/CN2022/117224
Other languages
English (en)
French (fr)
Inventor
张崇铭
刘仁茂
Original Assignee
夏普株式会社
张崇铭
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 夏普株式会社, 张崇铭 filed Critical 夏普株式会社
Publication of WO2023036120A1 publication Critical patent/WO2023036120A1/zh

Links

Images

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
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W56/00—Synchronisation arrangements
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W74/00—Wireless channel access
    • H04W74/08—Non-scheduled access, e.g. ALOHA
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02D—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN INFORMATION AND COMMUNICATION TECHNOLOGIES [ICT], I.E. INFORMATION AND COMMUNICATION TECHNOLOGIES AIMING AT THE REDUCTION OF THEIR OWN ENERGY USE
    • Y02D30/00—Reducing energy consumption in communication networks
    • Y02D30/70—Reducing energy consumption in communication networks in wireless communication networks

Definitions

  • the present invention relates to the technical field of wireless communication, and more specifically, the present invention relates to a method executed by user equipment and corresponding user equipment.
  • Dual connectivity or multi-connection means that a UE working in a connected state establishes a physical wireless path with more than one network node and realizes data transmission.
  • it includes a master control node (Master Node, MN) and a secondary control node (Secondary Node, SN).
  • the MN is executed by a Gnb/Enb/ng-eNB, and the serving cell group controlled by the MN is called the Master Cell Group (MCG).
  • MCG Master Cell Group
  • the SN is executed by one or more Gnb/Enb/ng-eNBs, and the serving cell group controlled by the SN is called a secondary cell group (Secondary Cell Group, SCG).
  • a UE configured with dual connectivity or multiple connectivity can communicate with the MCG and SCG to achieve a higher data rate.
  • the power consumption of the UE also increases exponentially.
  • the network side may send an SCG deactivation command or an instruction to deactivate the SCG to the UE under appropriate circumstances, for example, when the communication traffic of the UE is small.
  • the base station may also send an SCG activation command or instruction to the UE to activate the deactivated SCG.
  • the command or instruction for activating the SCG may also carry information instructing the UE to activate the SCG in a random access-less (RACH-less) manner.
  • the method without random access means that after receiving the command or instruction to activate the SCG, the UE receives the downlink PDCCH on the pre-configured or designated frequency band on the primary serving cell (Pscell) of the SCG, and decodes it with the C-RNTI of the UE. Such a process is called monitoring the PDCCH.
  • the UE receives the PDCCH and can use the UE's C-RNTI to decode or descramble, then it can be considered that the UE has received the PDCCH with its C-RNTI as the target address, and the UE can consider that the SCG is successfully activated, or the SCG is activated The process completed successfully.
  • Timing advance an effective timing advance
  • TAT timeAlignmentTimer
  • the present invention proposes a solution to the following problem, that is, there is a time interval between the UE receiving the command to activate the SCG and the UE listening to the PDCCH with the UE's C-RNTI as the target address, and TAT may run overtime during this period , then the solution to the problem of how the UE handles the SCG activation process is proposed.
  • a method performed by user equipment is provided, which is performed by a user equipment UE configured with dual connectivity or multi-connectivity in the process of communicating with the primary cell group MCG and the secondary cell group SCG method, comprising the steps of:
  • the UE receives the indication information of activating the SCG, and the indication information of the activation SCG is carried in the MAC CE or in the signaling of the physical layer or in the RRC message;
  • the UE determines whether to perform SCG activation in a non-random access manner
  • the UE determines to activate the SCG in the non-random access manner
  • the UE activates the SCG based on the non-random access manner and monitors the PDCCH.
  • the UE starts or restarts the timer TAT associated with the timing advance TA.
  • the UE starts the SCG activation management timer.
  • the UE When the UE receives the PDCCH with the UE's C-RNTI as the target address, the UE stops the SCG activation management timer.
  • the UE Before the UE receives the PDCCH with the UE's C-RNTI as the target address, or while the SCG activation management timer is running, when the TAT operation related to the SCG times out, the UE indicates to the upper layer that there is no random access SCG activation failed.
  • the UE Before the UE receives the PDCCH with the UE's C-RNTI as the target address, or when the SCG activation management timer is running, when the TAT related to the SCG runs overtime, the UE triggers the SCG activation at the MAC layer random access procedure.
  • the UE stops the SCG activation management timer.
  • the UE determines whether to adopt the non-random access mode based on the indication information of activating the SCG, and the indication information of activating the SCG includes information indicating that the UE adopts the non-random access mode; or,
  • the UE After receiving the indication information of activating the SCG, the UE determines whether to use the non-random access method based on the judgment.
  • the basis of the above judgment is that the TAT is running, or the beam failure has not been detected, or the beam failure recovery has not been triggered. , or the link quality of the primary serving cell of the SCG is higher than a preset threshold.
  • Whether to adopt a non-random access manner is determined based on whether the information related to random access is carried in the indication information for activating the SCG.
  • a user equipment including:
  • the instructions when executed by the processor, cause the user equipment to perform the method according to the above description.
  • the SCG activation process can be correctly handled.
  • Fig. 1 is a flowchart showing a method executed by a user equipment according to an embodiment of the present invention.
  • Fig. 2 is a brief structural block diagram of the user equipment involved in the present invention.
  • E-UTRAN Evolved Universal Terrestrial Radio Access Network
  • Evolved Terrestrial Radio Access Network Evolved Terrestrial Radio Access Network
  • Gnb provides NR user plane and control plane protocol stacks to UE, and connects to base station nodes of 5G core network
  • Enb provides the UE with the E-UTRAN user plane and control plane protocol stack, and connects to the base station node of the EPC core network
  • Ng-enb provides the UE with the E-UTRAN user plane and control plane protocol stack, and connects to the base station node of the 5G core network
  • Dual connectivity or multi-connection means that a UE working in a connected state establishes a physical wireless path with more than one network node and realizes data transmission.
  • it includes a master control node (Master Node, MN) and a secondary control node (Secondary Node, SN).
  • MN is performed by a base station, which can be Gnb supporting 5G technology (New Rat, NR), or Enb supporting 4G technology, or ng-eNB supporting connection to the next-generation core network (5G core network).
  • a base station which can be Gnb supporting 5G technology (New Rat, NR), or Enb supporting 4G technology, or ng-eNB supporting connection to the next-generation core network (5G core network).
  • the serving cell group controlled by the MN is called the master cell group (Master Cell Group, MCG).
  • MCG Master Cell Group
  • PCell Primary Cell
  • RLM radio link monitoring
  • SCell secondary serving cell
  • SRB SRB established between the MN and the UE, usually referred to as SRB1, is mainly used to transfer RRC messages between the MN and the UE.
  • the SN is performed by a base station, which can be Gnb supporting 5G technology, or Enb supporting 4G technology, or ng-eNB supporting connection to the next-generation core network (5G core network).
  • the serving cell group controlled by the SN is called a secondary cell group (Secondary Cell Group, SCG).
  • SCG Secondary Cell Group
  • the SCG includes at least one primary serving cell, which is called PSCell (Primary Second Cell).
  • the UE performs radio link monitoring on the PSCell. If other cells are included in the SCG, they may be collectively referred to as a secondary serving cell SCell.
  • An SRB can be established between the SN and the UE, usually called SRB3, which is mainly used to transfer RRC messages between the SN and the UE, such as measurement reports associated with the SCG.
  • Time advance grouping TAG (Timing advance Group)
  • Timing Advance TA Timing Advance is used for UE to perform uplink synchronization or uplink transmission.
  • the TA value for the UE to perform uplink transmission in different serving cells may be different.
  • the serving cells with the same TA value can be classified into the same TAG.
  • the TAG to which the Pcell belongs may be called PTAG
  • the TAG to which the Pcell belongs may be called STAG.
  • Each TAG has a corresponding or related TA timer (timeAlignmentTimer, TAT). It can be considered that the TA timer corresponding to or associated with the SCG is also the TA timer corresponding to the STAG.
  • its corresponding TA value is considered as a valid TA value, which can be used for uplink transmission (Uplink Transmission) or uplink synchronization (Uplink Synchronization).
  • Uplink Transmission Uplink Transmission
  • Uplink Synchronization Uplink Synchronization
  • the corresponding TA value may be considered invalid or discarded.
  • SCG can be activated (activate) or deactivated (deactivate).
  • a deactivated SCG can be activated by UE or network side/base station.
  • the activation of SCG mainly includes the activation of Pscell of SCG.
  • the UE can perform random access on the PSCell. There are two types of random access, one is based on a four-step (4-step) random access process, including:
  • the UE receives the random access response sent by the base station, and the random access response contains the Timing Advance Command MAC CE, which indicates the timing advance information adopted by the UE, and the TAG identity (TAG Identity, TAG ID).
  • the UE When the UE receives the Timing Advance Command MAC CE, the UE will apply (apply) the Timing Advance Command and start the timeAlignmentTimer corresponding to the TAG indicated by the TAG ID;
  • the UE monitors the PDCCH.
  • the UE receives the PDCCH with the UE's C-RNTI as the target address, it means that the random access is successfully completed.
  • message A which includes the preamble sequence and the load of message A, and the C-RNTI of UE is carried in the load of message A;
  • the UE monitors the PDCCH.
  • the UE receives the PDCCH with the UE's C-RNTI as the target address,
  • the UE If the timeAlignmentTimer related to the STAG is running, the UE considers that the random access is successfully completed;
  • the UE determines whether the random access is successfully completed. If the timeAlignmentTimer related to the STAG is not running, when the UE receives the PDCCH with the UE's C-RNTI as the target address, and the PDCCH indicates a downlink assignment (downlink assignment), the MAC PDU carried by the downlink assignment contains Absolute Timing Advance Command MAC CE, then the UE considers that the random access is successfully completed.
  • the UE may not perform random access, but directly monitors (monitors) the PDCCH on the Pscell.
  • Such a manner may be referred to as a manner of activating an SCG using no random access (RACH-less).
  • the method without random access means that after receiving the command or instruction to activate the SCG, the UE receives the downlink PDCCH in the pre-configured search space (search space) on the primary serving cell (Pscell) of the SCG, and uses the UE's C-RNTI Decoding, such a process is called PDCCH monitoring (PDCCH monitoring).
  • search space search space
  • Pscell primary serving cell
  • PDCCH monitoring PDCCH monitoring
  • the UE If the information transmitted on the PDCCH received by the UE can be correctly decoded by the UE, for example, the C-RNTI of the UE is used for descrambling or the C-RNTI of the UE can be used for decoding, then it can be considered that the UE received the information during PDCCH monitoring.
  • PDCCH PDCCH addressed to C-RNTI
  • the UE may consider that upon receiving such a PDCCH, it is determined that the SCG is successfully activated, or that the SCG activation process is successfully completed.
  • This embodiment provides a method performed by a UE configured with dual connectivity or multi-connectivity in the process of communicating with the MCG and SCG, as shown in FIG. 1 , including:
  • Step S101 UE receives indication information of activating SCG, preferably, such activation indication information is carried in MAC CE, or in physical layer signaling (for example, DCI). It may also be carried in an RRC message, such as an RRC reconfiguration message (RRC reconfiguration Message).
  • RRC message such as an RRC reconfiguration message (RRC reconfiguration Message).
  • Step S102 The UE determines whether to use the RACH-less way to perform SCG activation.
  • the UE may determine whether to adopt the RACH-less mode based on the indication information of activating the SCG.
  • the indication information for activating the SCG received by the UE may also include information indicating that the UE adopts the RACH-less manner.
  • Such indications may be explicit or implicit.
  • a bit is set in the indication information for activating SCG, and its name is defined as RACH-less.
  • the UE can determine whether to use the RACH-less mode based on the value of RACH-less. Specifically, if the value of RACH-less If the value is true (true), or set to '1', it indicates explicitly that the UE adopts RACH-less mode to activate SCG. On the contrary, if the value of RACH-less is false (false), or set to '0', it indicates that the UE does not use RACH-less to activate SCG, or uses random access to activate SCG.
  • the RACH-less method determines whether to use the RACH-less method based on whether the information related to random access is carried in the indication information of activating the SCG.
  • the information related to random access is carried in the indication information of activating the SCG, for example Resource distribution for performing random access, information such as the frequency, time, or preamble sequence of the PRACH channel, then implicitly indicate that the RACH-less method is not used; if such information related to random access is not carried, then The implicit indication adopts the RACH-less method.
  • the UE may determine to activate the SCG in an RACH-less manner after receiving the indication information for activating the SCG.
  • the basis for the judgment can be that the TAT is running, or the undetected beam failure beam failure or the untriggered beam failure recovery beam failure recovery, or the link quality of the SCG PScell is higher than the preset threshold value etc.
  • the UE may determine whether to activate the SCG in an RACH-less manner by means of carrying the SCG activation indication information.
  • the UE can always consider that the RACH-less method is used to activate the SCG, that is, it is determined to use the RACH-less method to activate the SCG;
  • the UE may use the foregoing method to determine whether to use the RACH-less method to activate the SCG.
  • step S102 On the basis of step S102, after the UE determines to activate the SCG in a RACH-less manner, the UE executes step S103.
  • step S102 the UE determines to use random access to activate the SCG, then the UE starts a random access procedure.
  • Step S103 UE activates SCG and monitors PDCCH. That is, when the UE determines to use the RACH-less way to activate the SCG, the UE activates the SCG based on the RACH-less way, and monitors the PDCCH.
  • the UE may perform an operation of activating the SCG, such as activating a PScell, and optionally starting an SCG activation management timer, and monitoring the PDCCH.
  • an operation of activating the SCG such as activating a PScell, and optionally starting an SCG activation management timer, and monitoring the PDCCH.
  • the UE may stop the SCG activation management timer.
  • the UE Before the UE receives the PDCCH with the UE's C-RNTI as the target address, or while the SCG activation management timer is running, when the TAT operation related to the SCG times out, the UE indicates to the upper layer that there is no random access SCG activation failure (RACH-less failure), specifically, may be indicated by the MAC layer of the UE to the RRC layer.
  • RACH-less failure random access SCG activation failure
  • the RRC layer can trigger or start the SCG failure information process, and report the failure of the SCG.
  • the reason for the failure can be indicated in the SCG failure information message generated by the UE and sent to the base station as the SCG Activation failed, or the RACH-less SCG failed to be activated.
  • the UE stops the SCG activation management timer.
  • the UE Before the UE receives the PDCCH with the UE's C-RNTI as the target address, or when the SCG activation management timer is running, when the SCG-related TAT runs overtime, the UE can also trigger random access at the MAC layer Procedure, this random access procedure is used for SCG activation. Preferably, the UE can stop the SCG activation management timer at the same time. In the random access procedure for SCG activation, if the UE receives the PDCCH with the UE's C-RNTI as the target address, it can be considered that the random access is successfully completed.
  • a step of starting or restarting the TA timer by the UE may also be included, and the TA timer is a timer associated with the SCG.
  • This embodiment provides another method performed by a UE configured with dual connectivity or multi-connectivity in the process of communicating with the MCG and SCG, including:
  • Step i The UE receives the indication information of activating the SCG.
  • activation indication information is carried in the MAC CE, or in the signaling of the physical layer (for example, DCI). It may also be carried in an RRC message, such as an RRC reconfiguration message.
  • Step 2 UE determines whether to use RACH-less way to perform SCG activation.
  • the UE may determine whether to adopt the RACH-less mode based on the indication information of activating the SCG.
  • the indication information for activating the SCG received by the UE may also include information indicating that the UE adopts the RACH-less manner.
  • Such indications may be explicit or implicit.
  • a bit is set in the indication information for activating SCG, and its name is defined as RACH-less.
  • the UE can determine whether to use the RACH-less mode based on the value of RACH-less. Specifically, if the value of RACH-less If the value is true (true), or set to '1', it indicates explicitly that the UE adopts RACH-less mode to activate SCG. On the contrary, if the value of RACH-less is false (false), or set to '0', it indicates that the UE does not use RACH-less to activate SCG, or uses random access to activate SCG .
  • the RACH-less method determines whether to use the RACH-less method based on whether the information related to random access is carried in the indication information of activating the SCG.
  • the information related to random access is carried in the indication information of activating the SCG, for example Resource distribution for performing random access, information such as the frequency, time, or preamble sequence of the PRACH channel, then implicitly indicate that the RACH-less method is not used; if such information related to random access is not carried, then The implicit indication adopts the RACH-less method.
  • the UE may determine to activate the SCG in a RACH-less manner after receiving the indication information for activating the SCG.
  • the basis for judging may be that TAT is running, or beam failure is not detected or beam failure recovery is not triggered, or the link quality of SCG PScell is higher than the preset threshold value, etc.
  • the UE may determine whether to activate the SCG in an RACH-less manner by means of carrying the SCG activation indication information.
  • the UE can always consider that the RACH-less method is used to activate the SCG, that is, it is determined to use the RACH-less method to activate the SCG;
  • the UE may use the aforementioned method to determine whether to use the RACH-less method to activate the SCG.
  • step 3 After the UE determines to activate the SCG in a RACH-less manner, the UE performs step 3.
  • step 2 the UE determines to use random access to activate the SCG, then the UE starts a random access procedure.
  • Step 3 The UE starts or restarts the TA timer.
  • the TA timer is a timer associated with the SCG, for example, the TA timer corresponding to the Timing Advance Group (Timing Advance Group) where the Pscell is located, or the TA belonging to or corresponding to the Secondary Timing Advance Group (Secondary Timing Advance Group) timer.
  • Timing Advance Group Timing Advance Group
  • Secondary Timing Advance Group Secondary Timing Advance Group
  • the RRC layer may instruct the associated MAC entity to start or restart the TA timer (instruct the associated MAC entity to start/restart timeAlignmentTimer).
  • the relevant MAC entity here refers to the MAC entity of the SCG, and the activated TAT is the TAT corresponding to the SCG or STAG.
  • UE when the indication information of activating SCG is carried in MAC CE or DCI, then UE can start or restart when receiving the indication information of activating SCG and determining to use RACH-less mode to activate SCG
  • the TA timer indicates to the upper layer (for example, the RRC layer) to activate the SCG or the SCG is activated. Based on the received indication information, at the RRC layer, the UE may start the SCG activation management timer described in Embodiment 1.
  • the UE activates the SCG based on the received SCG activation indication information sent by the base station.
  • the UE can actively activate the SCG based on conditions such as whether there is data arrival on the UE side, which can also be referred to as UE autonomous activation of the SCG, or automatic activation of the SCG, to distinguish it from passive activation based on activation indication information .
  • the UE When the UE decides to actively activate the SCG, if the TAT of the STAG is running, the UE can activate the SCG in a RACH-less manner. Specifically, it can be:
  • step 3.1 the UE decides to actively activate the SCG.
  • the UE may determine to activate the SCG.
  • the UE decides to activate the SCG.
  • step 3.2 the UE determines whether to use the RACH-less method to activate the SCG.
  • the UE may determine to perform SCG activation in a RACH-less manner.
  • the UE activates the SCG and monitors the PDCCH. That is, when the UE determines to use the RACH-less way to activate the SCG, the UE activates the SCG based on the RACH-less way, and monitors the PDCCH.
  • the UE sends a scheduling request, where the PUCCH resource used to transmit the scheduling request is a pre-configured PUCCH resource used to activate the SCG.
  • the UE then monitors the PDCCH. And optionally, the UE may start (start) the SCG autonomous activation management timer.
  • the UE may stop the SCG autonomous activation management timer.
  • the UE Before the UE receives the PDCCH with the UE's C-RNTI as the target address, or when the SCG autonomous activation management timer is running, when the TAT operation related to the SCG times out, the UE can indicate to the upper layer based on the non-random The access SCG autonomous activation fails (RACH-less failure), or indicates to the upper layer that the SCG autonomous activation fails.
  • the MAC layer of the UE may indicate to the RRC layer.
  • the UE may stop the running SCG autonomous activation management timer.
  • the RRC layer may instruct the lower layer (such as the MAC layer) to start a random access procedure for activating the SCG.
  • the UE may indicate to the upper layer that the SCG self-activation fails, or indicates that the SCG self-activation does not respond.
  • the RRC layer may also instruct the lower layer (such as the MAC layer) to start a random access procedure, and the random access procedure is used to activate the SCG.
  • the lower layer such as the MAC layer
  • the UE starts a random access procedure at the MAC layer, and the random access procedure is used to activate the SCG.
  • the SCG autonomous activation management timer mentioned in this embodiment may be the same timer as the SCG activation management timer in Embodiment 1 or 2, and may also be a different timer.
  • the former is used for UE autonomous activation,
  • the latter is used for situations based on activation indication information.
  • the UE activates the SCG based on the received SCG activation indication information sent by the base station.
  • the UE can actively activate the SCG based on conditions such as whether there is data arrival on the UE side, which can also be referred to as UE autonomous activation of the SCG, or automatic activation of the SCG, to distinguish it from passive activation based on activation indication information .
  • the UE When the UE decides to actively activate the SCG, if the TAT of the STAG is running, the UE can activate the SCG in a RACH-less manner. Specifically, it can be:
  • step 4.1 the UE decides to actively activate the SCG.
  • the UE may determine to activate the SCG.
  • the UE decides to activate the SCG.
  • step 4.2 the UE determines whether to use the RACH-less method to activate the SCG.
  • the UE may determine to perform SCG activation in a RACH-less manner.
  • step 4.3 when the UE determines to use the RACH-less method to activate the SCG, the UE starts or restarts the TA timer.
  • the TA timer is a timer associated with the SCG, for example, the TA timer corresponding to the Timing Advance Group (Timing Advance Group) where the Pscell is located, or the TA belonging to or corresponding to the Secondary Timing Advance Group (Secondary Timing Advance Group) timer.
  • Timing Advance Group Timing Advance Group
  • Secondary Timing Advance Group Secondary Timing Advance Group
  • the RRC layer may instruct the associated MAC entity to start or restart the TA timer (instruct the associated MAC entity to start/restart timeAlignmentTimer).
  • the relevant MAC entity here refers to the MAC entity of the SCG, and the activated TAT is the TAT corresponding to the SCG or STAG.
  • Fig. 2 is a brief structural block diagram of the user equipment involved in the present invention.
  • the user equipment UE200 includes a processor 201 and a memory 202 .
  • the processor 201 may include, for example, a microprocessor, a microcontroller, an embedded processor, and the like.
  • the memory 202 may include, for example, a volatile memory (such as a random access memory RAM), a hard disk drive (HDD), a nonvolatile memory (such as a flash memory), or other memories.
  • Program instructions are stored on memory 202 . When the instructions are executed by the processor 201, the above method described in detail in the present invention and executed by the user equipment may be executed.
  • the program running on the device according to the present invention may be a program that causes a computer to realize the functions of the embodiments of the present invention by controlling a central processing unit (CPU).
  • the program or information processed by the program may be temporarily stored in volatile memory (such as random access memory RAM), hard disk drive (HDD), non-volatile memory (such as flash memory), or other memory systems.
  • a program for realizing the functions of the various embodiments of the present invention can be recorded on a computer-readable recording medium.
  • the corresponding functions can be realized by causing a computer system to read programs recorded on the recording medium and execute the programs.
  • the so-called “computer system” here may be a computer system embedded in the device, which may include an operating system or hardware (such as peripheral devices).
  • the "computer-readable recording medium” may be a semiconductor recording medium, an optical recording medium, a magnetic recording medium, a recording medium in which a short-term dynamic storage program is stored, or any other recording medium readable by a computer.
  • circuits for example, single-chip or multi-chip integrated circuits.
  • Circuits designed to perform the functions described in this specification may include general-purpose processors, digital signal processors (DSPs), application-specific integrated circuits (ASICs), field-programmable gate arrays (FPGAs), or other programmable logic devices, discrete gate or transistor logic, discrete hardware components, or any combination of the above.
  • DSPs digital signal processors
  • ASICs application-specific integrated circuits
  • FPGAs field-programmable gate arrays
  • a general-purpose processor can be a microprocessor, or it can be any existing processor, controller, microcontroller, or state machine.
  • the above-mentioned circuits may be digital circuits or analog circuits. Where advances in semiconductor technology have resulted in new integrated circuit technologies that replace existing integrated circuits, one or more embodiments of the invention may also be implemented using these new integrated circuit technologies.
  • the present invention is not limited to the above-described embodiments. Although various examples of the embodiments have been described, the present invention is not limited thereto.
  • Fixed or non-mobile electronic equipment installed indoors or outdoors can be used as terminal equipment or communication equipment, such as AV equipment, kitchen equipment, cleaning equipment, air conditioners, office equipment, vending machines, and other household appliances.

Landscapes

  • Engineering & Computer Science (AREA)
  • Signal Processing (AREA)
  • Computer Networks & Wireless Communication (AREA)
  • Mobile Radio Communication Systems (AREA)

Abstract

本发明提供一种由用户设备执行的方法及用户设备，该方法是被配置了双连接或者多连接的用户设备UE在与主小区组MCG以及辅小区组SCG进行通信的过程中所执行的方法，包括如下步骤：UE接收激活SCG的指示信息，该激活SCG的指示信息携带在MAC CE中或者是物理层的信令中或者是RRC消息中；UE确定是否采用无随机接入方式来执行SCG激活；在UE确定采用无随机接入方式来执行SCG激活的情况下，UE基于无随机接入方式激活SCG，并监听PDCCH。

Description

由用户设备执行的方法及用户设备 技术领域
本发明涉及无线通信技术领域，更具体地，本发明涉及由用户设备执行的方法以及相应的用户设备。
背景技术
随着移动通信的快速增长和技术的巨大进步，世界将走向一个完全互联互通的网络社会，即任何人或任何东西在任何时间和任何地方都可以获得信息和共享数据。为了增强移动宽带业务需求、海量物联网终端的通信需求，新一代通信技术(5G)将研究用户在双连接以至多连接下的技术增强(RP-181469 New WID on DC and CA enhancements)。
双连接或者多连接，是指工作在连接态的UE与多于一个网络节点建立物理上的无线通路，并实现数据传输。其中，包括主控制节点(Master Node，MN)与辅助控制节点(Secondary Node，SN)。MN由一个Gnb/Enb/ng-eNB来执行，由MN控制的服务小区组称为主小区组(Master Cell Group，MCG)。相应地，SN由一个或多个Gnb/Enb/ng-eNB来执行，由SN控制的服务小区组称为辅小区组(Secondary Cell Group，SCG)。
被配置了双连接或者多连接的UE可以通过和MCG以及和SCG进行通信，实现较高的数据速率。然而，相应地，为了维护和两个网络节点之间的通信，UE的功耗也成倍的增加。为了节约UE的功耗，可以在适当的情况下，例如当UE的通信流量较小的情况下，网络侧通过向UE发送SCG去激活命令或者指示去激活(deactivate)SCG。
当网络侧有数据到达时，基站还可以向UE发送激活SCG命令或者指示来激活已经被去激活的SCG。在激活SCG的命令或者指示中还可以携带信息指示UE采用无随机接入(RACH-less)的方式来激活SCG。无随机接入的方式是指UE在接收到激活SCG的命令或者指示之后，在SCG的主服务小区(Pscell)上预先配置或者指定的频带上接收下行PDCCH，并用UE 的C-RNTI进行解码，这样的过程被称为是监听PDCCH。如果UE接收到PDCCH并且能用UE的C-RNTI进行解码或者去加扰，那么可以认为UE接收到以其C-RNTI为目标地址的PDCCH，以及UE可以认为SCG被成功激活，或者是SCG激活过程成功完成。
基站判断UE可以执行RACH-less的方式的前提之一是UE侧维护着有效的时间提前量(Timing advance)，具体表现为与时间提前量相关联的定时器TA定时器(timeAlignmentTimer，TAT)在运行中。但是从UE接收到激活SCG的命令到UE监听到以UE的C-RNTI为目标地址的PDCCH之间存在着时间间隔。TAT可能在这期间运行超时，那么UE如何处理这个SCG激活过程是需要解决的问题。
发明内容
本发明针对以下问题提出了解决方案，即，针对从UE接收到激活SCG的命令到UE监听到以UE的C-RNTI为目标地址的PDCCH之间存在着时间间隔，TAT可能在这期间运行超时，那么UE如何处理这个SCG激活过程这样的问题提出了解决方案。
根据本发明的一个方面，提供了一种由用户设备执行的方法，是被配置了双连接或者多连接的用户设备UE在与主小区组MCG以及辅小区组SCG进行通信的过程中所执行的方法，包括如下步骤：
UE接收激活SCG的指示信息，该激活SCG的指示信息携带在MAC CE中或者是物理层的信令中或者是RRC消息中；
UE确定是否采用无随机接入方式来执行SCG激活；
在UE确定采用无随机接入方式来执行SCG激活的情况下，UE基于无随机接入方式激活SCG，并监听PDCCH。
在上述的由用户设备执行的方法中，优选的是，还包括如下步骤：
UE启动或者重新启动与时间提前量TA相关联的定时器TAT。
在上述的由用户设备执行的方法中，优选的是，还包括如下步骤：
UE启动SCG激活管理定时器。
在上述的由用户设备执行的方法中，优选的是，
当UE接收到以UE的C-RNTI为目标地址的PDCCH时，UE停止SCG激活管理定时器。
在上述的由用户设备执行的方法中，优选的是，
在UE接收到以UE的C-RNTI为目标地址的PDCCH之前，或者是SCG激活管理定时器正在运行期间，当发生和SCG相关的TAT运行超时的情况，那么UE向上层指示基于无随机接入的SCG激活发生失败。
在上述的由用户设备执行的方法中，优选的是，
在UE接收到以UE的C-RNTI为目标地址的PDCCH之前，或者是SCG激活管理定时器正在运行期间，当发生和SCG相关的TAT运行超时的情况，那么UE在MAC层触发用于激活SCG的随机接入流程。
在上述的由用户设备执行的方法中，优选的是，还包括如下步骤：
UE停止SCG激活管理定时器。
在上述的由用户设备执行的方法中，优选的是，
UE基于激活SCG的指示信息来确定是否采用无随机接入方式，该激活SCG的指示信息中包含指示UE采用无随机接入方式的信息；或者是，
UE在接收到激活SCG的指示信息之后基于判定来确定是否采用无随机接入方式，上述判定的依据是TAT正在运行，或者是没有被检测到的波束失败，或者是没有被触发的波束失败恢复，或者是SCG主服务小区的链路质量高于预先设定的门限值。
在上述的由用户设备执行的方法中，优选的是，
在激活SCG的指示信息中设置一个比特位，基于该比特位的取值来确定是否采用无随机接入方式；或者是，
基于在激活SCG的指示信息中是否携带了随机接入的相关信息来确定是否采用无随机接入方式。
根据本发明的另一个方面，提供了一种用户设备，包括：
处理器；以及
存储器，所述存储器上存储有指令，
所述指令在由所述处理器运行时，使所述用户设备执行根据上文所描述的方法。
根据本公开所涉及的由用户设备执行的方法以及相应的用户设备，能 够正确地处理SCG激活过程。
附图说明
图1是表示本发明的一实施例涉及的由用户设备执行的方法的流程图。
图2是本发明涉及的用户设备的简要结构框图。
具体实施方式
下面结合附图和具体实施方式对本发明进行详细阐述。应当注意，本发明不应局限于下文所述的具体实施方式。另外，为了简便起见，省略了对与本发明没有直接关联的公知技术的详细描述，以防止对本发明的理解造成混淆。
在具体描述之前，先对本发明中提到的若干术语做如下说明。除非另有指出，本发明中涉及的术语都具有下文的含义。
UE  User Equipment  用户设备
NR  New Radio  新一代无线技术
eLTE  Enhaced Long Term Evolution  增强的长期演进技术
E-UTRAN  Evolved Universal Terrestrial Radio Access Network进化的陆地无线接入网
DC  Dual Connectivity  双连接
MC  Multi Connectivity  多连接
Gnb  向UE提供NR用户面和控制面协议栈，并连接到5G核心网的基站节点
Enb  向UE提供E-UTRAN用户面和控制面协议栈，并连接到EPC核心网的基站节点
Ng-enb  向UE提供E-UTRAN用户面和控制面协议栈，并连接到5G核心网的基站节点
SRB  signaling radio bear  信令承载
DRB  Data radio bear  数据承载
Split SRB  分裂的信令承载
RLC  Radio Link Control  无线链路控制层
PDCP  Packet Data Convergence Protocol  分组数据汇聚协议层
MAC  Media Access Control  媒体访问控制层
CE  Control Element，控制元素
MAC CE  MAC control element  MAC控制元素
RRC  Radio Resource Control  无线资源控制层
SRS  Sounding Reference Signal  探测参考信号
CSI  Channel State Information  信道状态信息
PDCCH  Physical Downlink Control Channel  物理下行链路控制信道
PUCCH  Physical Uplink Control Channel  物理上行链路控制信道
DCI  Downlink Control Information  下行控制信息
SDU  Service Data Unit业务数据单元
PDU  Protocol Data Unit协议数据单元
TA  Timing advance时间提前量
BF  Beam Failure波束失败
BFR  Beam Failure Recovery波束失败恢复
RNTI  Radio Network Temporary Identifier无线网络临时标识
C-RNTI  Cell RNTI  小区RNTI
双连接或者多连接，是指工作在连接态的UE与多于一个网络节点建立物理上的无线通路，并实现数据传输。其中，包括主控制节点(Master Node，MN)与辅助控制节点(Secondary Node，SN)。
MN由一个基站来执行，可以是支持5G技术(New Rat，NR)的Gnb，或者是支持4G技术的Enb，还可以是支持连接到下一代核心网(5G核心网)的ng-eNB。
由MN控制的服务小区组称为主小区组(Master Cell Group，MCG)。其中至少有一个主服务小区，被称PCell(Primary Cell)，UE在PCell上进行无线链路监测(radio link mornitoring，RLM)。MCG中如果还包含了其他小区，可以统称为辅助服务小区SCell。MN和UE之间建立的SRB，通常称为SRB1，主要用于传递MN和UE之间的RRC消息。
SN由一个基站来执行，可以是支持5G技术的Gnb，或者是支持4G 技术的Enb，还可以是支持连接到下一代核心网(5G核心网)的ng-eNB。由SN控制的服务小区组称为辅小区组(Secondary Cell Group，SCG)。其中SCG中至少包含了一个主服务小区，被称为PSCell(Primary Second Cell)。
UE在PSCell上进行无线链路监测。SCG中如果还包含了其他小区，可以统称为辅助服务小区SCell。SN和UE之间可以建立SRB，通常称为SRB3，主要用于传递SN和UE之间的RRC消息，例如SCG相关联的测量报告。
时间提前分组TAG(Timing advance Group)
时间提前量TA，Timing Advance用于UE进行上行同步或者上行发送。UE在不同的服务小区进行上行发送的TA值可以不同。根据不同服务小区的TA值，可以将TA值相同的服务小区分在同一个TAG。其中，Pcell所属的TAG，可以被称为PTAG，Pscell所属的TAG，可以被称为STAG。每一个TAG都有对应的或者相关的TA定时器(timeAlignmentTimer，TAT)。可以认为与SCG相对应或者相关联的TA定时器同时也是和STAG相对应的TA定时器。通常在TA定时器运行期间，其对应的TA值被认为是有效的TA值，可以用于上行发送(Uplink Transmission)或者上行同步(Uplink Sychronization)。当TA运行超时时，对应的TA值可以被视为无效，或者被丢弃。
SCG的激活(SCG activation)
SCG可以被激活(activate)或者去激活(deactivate)。一个被去激活的SCG可以被UE或者网络侧/基站激活。SCG的激活主要包括SCG的Pscell的激活。为了实现在PScell的上行同步，在接收到SCG激活命令之后，UE可以在PSCell上执行随机接入。随机接入有两种，一种是基于四步(4-step)的随机接入过程，具体包括：
1 UE发送前导序列；
2 UE接收基站发送的随机接入响应，在随机接入响应中包含了Timing Advance Command MAC CE，其中指示了UE采用的时间提前量的信息，以及使用该TA值的TAG标识(TAG Identity，TAG ID)。当UE接收到Timing Advance Command MAC CE时，UE会应用(apply)该Timing Advance Command以及启动对应于TAG ID所指示的TAG的timeAlignmentTimer；
3 UE发送消息三，在消息三中携带UE的C-RNTI；
4 UE监听PDCCH，当UE接收以UE的C-RNTI为目标地址的PDCCH表示随机接入成功完成。
还有一种是基于两步(2-step)的随机接入过程，具体包括：
1 UE发送消息A，其中包括前导序列以及消息A的负载，在消息A的负载中携带了UE的C-RNTI；
2 UE监听PDCCH，当UE接收以UE的C-RNTI为目标地址的PDCCH，
-如果和STAG相关的timeAlignmentTimer正在运行，那么UE认为随机接入成功完成；
-如果和STAG相关的timeAlignmentTimer没有运行，那么当UE接收到以UE的C-RNTI为目标地址的PDCCH，并且该PDCCH指示了下行指派(downlink assignment)，这个下行指派携带的MAC PDU中包含了Absolute Timing Advance Command MAC CE，那么UE认为随机接入成功完成。
UE在接收到SCG激活命令之后，还可以不执行随机接入，而是直接在Pscell上监听(monitor)PDCCH。这样的方式可以被称为是采用无随机接入(RACH-less)的激活SCG的方式。无随机接入的方式是指UE在接收到激活SCG的命令或者指示之后，在SCG的主服务小区(Pscell)上预先配置的搜索空间(search space)上接收下行PDCCH，并用UE的C-RNTI进行解码，这样的过程被称为是PDCCH监听(PDCCH monitoring)。如果UE接收到的PDCCH上传输的信息能被UE正确解码，例如，采用UE的C-RNTI去加扰或者能采用UE的C-RNTI进行解码，那么可以认为UE在PDCCH监听的过程中接收到以其C-RNTI为目标地址的PDCCH(PDCCH addressed to C-RNTI)。进一步地，UE可以认为在接收到这样的PDCCH时，判定SCG被成功激活，或者是SCG激活过程成功完成。
以下，对本发明所涉及的具体实施例进行详细说明。另外，如上所述，本发明中的实施例是为了容易理解本发明而进行的示例性说明，并不是对本发明的限定。
【实施例1】
本实施例给出了一种被配置了双连接或者多连接的UE在与MCG以及SCG进行通信的过程中所执行的方法，如图1所示，包括：
步骤S101：UE接收激活SCG的指示信息，优选的，这样的激活指示信息携带在MAC CE中，或者是物理层的信令(例如，DCI)中。还可以是携带在RRC消息中，例如RRC重配置消息(RRC reconfiguration Message)。
步骤S102：UE确定是否采用RACH-less的方式来执行SCG激活。
UE可以基于激活SCG的指示信息来确定是否采用RACH-less方式。例如，在UE接收到的激活SCG的指示信息中还可以包含指示UE采用RACH-less的方式的信息。
这样的指示可以是显示的或者是隐式的。
例如，在激活SCG的指示信息中设置一个比特位，定义其名称为RACH-less，UE可以基于RACH-less的取值来确定是否采用RACH-less方式，具体可以是，如果RACH-less的取值为真(true)，或者设置为‘1’，那么显示地指示了UE采用RACH-less的方式来激活SCG。反之，如果RACH-less的取值为假(false)，或者设置为‘0’那么显示地指示了UE不采用RACH-less的方式来激活SCG，或者是采用随机接入的方式来激活SCG。
又例如，基于在激活SCG的指示信息中是否携带了随机接入的相关信息来确定是否采用RACH-less方式，具体可以是，在激活SCG的指示信息中携带了随机接入的相关信息，例如执行随机接入的资源分布，PRACH信道的频率、时间或者是前导序列等信息，那么则隐式的指示不采用RACH-less的方式；如果没有携带这样的和随机接入相关的信息，那么则隐式的指示采用RACH-less的方式。
又或者，在UE在接收到激活SCG的指示信息之后可以判定采用RACH-less的方式来激活SCG。判定的依据可以是TAT正在运行，或者是没有被检测到的波束失败beam failure或者是没有被触发的波束失败恢复beam failure recovery，又或者是SCG PScell的链路质量高于预先设定的门限值等。
又例如，UE可以通过激活SCG指示信息的携带方式来确定是否采用RACH-less的方式来激活SCG。
例如，当激活SCG的指示信息携带在MAC CE或者DCI中时，UE可以总是认为采用RACH-less的方式来激活SCG，即确定采用RACH-less的方式来激活SCG；
当激活SCG的指示信息携带在RRC消息中时，UE可以采用前述的方式来确定是否采用RACH-less的方式来激活SCG。
在步骤S102的基础上，在UE确定采用RACH-less的方式来激活SCG之后，UE执行步骤S103。
如果在步骤S102中，UE确定采用随机接入的方式来激活SCG，那么UE启动随机接入过程。
步骤S103：UE激活SCG，并监听PDCCH。即，在UE确定采用RACH-less的方式来执行SCG激活的情况下，UE基于RACH-less的方式激活SCG，并监听PDCCH。
具体可以是UE执行激活SCG的操作，例如激活PScell，以及可选的启动SCG激活管理定时器，并且监听PDCCH。
当UE接收到以UE的C-RNTI为目标地址的PDCCH时，UE可以停止SCG激活管理定时器。
在UE接收到以UE的C-RNTI为目标地址的PDCCH之前，或者是SCG激活管理定时器正在运行期间，当发生和SCG相关的TAT运行超时的情况，那么UE向上层指示基于无随机接入的SCG激活发生失败(RACH-less failure)，具体的，可以是UE的MAC层向RRC层指示。
基于该指示或者是在上述情况下，RRC层可以触发或者启动SCG failure information过程，报告SCG发生失败，优选的，可以在UE生成的、向基站发送的SCG failure information消息中指示失败的原因为SCG激活失败，或者是采用RACH-less的SCG激活失败。以及可选的，UE停止SCG激活管理定时器。
在UE接收到以UE的C-RNTI为目标地址的PDCCH之前，或者是SCG激活管理定时器正在运行期间，当发生和SCG相关的TAT运行超时的情况，UE还可以在MAC层触发随机接入流程，这个随机接入流程是用于SCG的激活。优选的，UE可以同时停止SCG激活管理定时器。在用于SCG激活的随机接入流程中，如果UE接收到以UE的C-RNTI为目标地址的PDCCH时，可以认为随机接入成功完成。
在本实施例中，还可以包括UE启动或者重新启动TA定时器的步骤，该TA定时器是与SCG相关联的定时器。
上述“在UE接收到以UE的C-RNTI为目标地址的PDCCH之前，或者是SCG激活管理定时器正在运行期间”可以认为SCG的激活还没有成功完成，因此可以替换为“在SCG激活完成之前”。
【实施例2】
本实施例给出了另一种被配置了双连接或者多连接的UE在与MCG以及SCG进行通信的过程中所执行的方法，包括：
步骤i：UE接收激活SCG的指示信息，优选的，这样的激活指示信息携带在MAC CE中，或者是物理层的信令(例如，DCI)中。还可以是携带在RRC消息中，例如RRC重配置消息。
步骤2：UE确定是否采用RACH-less的方式来执行SCG激活。
UE可以基于激活SCG的指示信息来确定是否采用RACH-less方式。例如，在UE接收到的激活SCG的指示信息中还可以包含指示UE采用RACH-less的方式的信息。
这样的指示可以是显示的或者是隐式的。
例如，在激活SCG的指示信息中设置一个比特位，定义其名称为RACH-less，UE可以基于RACH-less的取值来确定是否采用RACH-less方式，具体可以是，如果RACH-less的取值为真(true)，或者设置为‘1’，那么显示地指示了UE采用RACH-less的方式来激活SCG。反之，如果RACH-less的取值为假(false)，或者设置为‘0’，那么显示地指示了UE不采用RACH-less的方式来激活SCG，或者是采用随机接入的方式来激活SCG。
又例如，基于在激活SCG的指示信息中是否携带了随机接入的相关信息来确定是否采用RACH-less方式，具体可以是，在激活SCG的指示信息中携带了随机接入的相关信息，例如执行随机接入的资源分布，PRACH信道的频率、时间或者是前导序列等信息，那么则隐式的指示不采用RACH-less的方式；如果没有携带这样的和随机接入相关的信息，那么则隐式的指示采用RACH-less的方式。
又或者，在UE在接收到激活SCG的指示信息之后可以判定采用 RACH-less的方式来激活SCG。判定的依据可以是TAT正在运行，或者是没有被检测到的beam failure或者是没有被触发的beam failure recovery，又或者是SCG PScell的链路质量高于预先设定的门限值等。
又例如，UE可以通过激活SCG指示信息的携带方式来确定是否采用RACH-less的方式来激活SCG。
例如，当激活SCG的指示信息携带在MAC CE或者DCI中时，UE可以总是认为采用RACH-less的方式来激活SCG，即确定采用RACH-less的方式来激活SCG；
当激活SCG的指示信息携带在RRC消息时，UE可以采用前述的方式来确定是否采用RACH-less的方式来激活SCG。
在步骤2的基础上，在UE确定采用RACH-less的方式来激活SCG之后，UE执行步骤3。
如果在步骤2中，UE确定采用随机接入的方式来激活SCG，那么UE启动随机接入过程。
步骤3：UE启动或者重新启动TA定时器。
该TA定时器是与SCG相关联的定时器，例如Pscell所在时间提前组(Timing Advance Group)相对应的TA定时器，或者是属于或者对应于第二时间提前组(Secondary Timing Advance Group)的TA定时器。
在一种情况下，当激活SCG的指示信息被携带在RRC消息中，那么可以由RRC层指示相关的MAC实体启动或者重新启动TA定时器(instruct the associated MAC entity to start/restart timeAlignmentTimer)。这里相关的MAC实体是指SCG的MAC实体，启动的TAT是对应于SCG或者STAG的TAT。
在另外一种情况下，当激活SCG的指示信息被携带在MAC CE或者DCI中，那么UE可以在接收到激活SCG的指示信息，且确定采用RACH-less方式来激活SCG时，启动或者重新启动TA定时器，以及优选的，向上层(例如，RRC层)指示激活SCG或者SCG被激活。基于接收到的指示信息，在RRC层，UE可以启动实施例1中所述的SCG激活管理定时器。
【实施例3】
在实施例1和2中，UE基于接收到的、基站发送的SCG激活指示信 息，来激活SCG。在本实施例中，UE可以基于在UE侧是否有数据到达等条件来主动激活SCG，这里还可以称为UE自主激活SCG，或者是自动激活SCG，以和基于激活指示信息的被动激活相区别。
当UE决定主动激活SCG时，如果STAG的TAT正在运行，那么UE可以采用RACH-less的方式来激活SCG。具体可以是：
步骤3.1，UE决定主动激活SCG。
当UE侧有数据到达时，UE可以确定激活SCG。
还可以是当UE侧的数据到达超过门限值时，UE决定激活SCG。
这里不对UE进行判断主动激活SCG与否的条件进行限制。
步骤3.2，UE确定是否采用RACH-less的方式来执行SCG激活。
例如，当STAG对应的或者是相关联的TAT正在运行，那么UE可以确定采用RACH-less的方式来执行SCG激活。
步骤3.3，UE激活SCG，并监听PDCCH。即，在UE确定采用RACH-less的方式来执行SCG激活的情况下，UE基于RACH-less的方式激活SCG，并监听PDCCH。
具体包括：UE发送调度请求，这里用于传输调度请求的PUCCH资源是预先配置的用于激活SCG的PUCCH资源。
然后UE监听PDCCH。以及可选的，UE可以启动(start)SCG自主激活管理定时器。
在SCG自主激活管理定时器运行期间，当UE接收到以UE的C-RNTI为目标地址的PDCCH时，UE可以停止SCG自主激活管理定时器。
在UE接收到以UE的C-RNTI为目标地址的PDCCH之前，或者是SCG自主激活管理定时器正在运行期间，当发生和SCG相关的TAT运行超时的情况，那么UE可以向上层指示基于无随机接入的SCG自主激活发生失败(RACH-less failure)，或者是向上层指示SCG自主激活发生失败。具体的，可以是UE的MAC层向RRC层指示。可选的，UE可以停止运行的SCG自主激活管理定时器。
基于该指示，RRC层可以指示下层(例如MAC层)启动随机接入过程，该随机接入过程用于激活SCG。
当SCG自主激活管理定时器运行超时时，UE可以向上层指示SCG自主激活发生失败，或者是指示SCG自主激活无响应。
基于该指示，RRC层也可以指示下层(例如MAC层)启动随机接入过程，该随机接入过程用于激活SCG。
又或者是，当SCG自主激活管理定时器运行超时，在MAC层UE启动随机接入过程，该随机接入过程用于激活SCG。
本实施例中提到的SCG自主激活管理定时器与实施例1或2中的SCG激活管理定时器可以是相同的定时器，也可以是不同的定时器，前者用于UE自主激活的情况，后者用于基于激活指示信息的情况。
【实施例4】
在实施例1和2中，UE基于接收到的、基站发送的SCG激活指示信息，来激活SCG。在本实施例中，UE可以基于在UE侧是否有数据到达等条件来主动激活SCG，这里还可以称为UE自主激活SCG，或者是自动激活SCG，以和基于激活指示信息的被动激活相区别。
当UE决定主动激活SCG时，如果STAG的TAT正在运行，那么UE可以采用RACH-less的方式来激活SCG。具体可以是：
步骤4.1，UE决定主动激活SCG。
当UE侧有数据到达时，UE可以确定激活SCG。
还可以是当UE侧的数据到达超过门限值时，UE决定激活SCG。
这里不对UE进行判断主动激活SCG与否的条件进行限制。
步骤4.2，UE确定是否采用RACH-less的方式来执行SCG激活。
例如，当STAG对应的或者是相关联的TAT正在运行，那么UE可以确定采用RACH-less的方式来执行SCG激活。
步骤4.3，在UE确定采用RACH-less的方式来执行SCG激活的情况下，UE启动或者重新启动TA定时器。
该TA定时器是与SCG相关联的定时器，例如Pscell所在时间提前组(Timing Advance Group)相对应的TA定时器，或者是属于或者对应于第二时间提前组(Secondary Timing Advance Group)的TA定时器。
可以由RRC层指示相关的MAC实体启动或者重新启动TA定时器(instruct the associated MAC entity to start/restart timeAlignmentTimer)。这里相关的MAC实体是指SCG的MAC实体，启动的TAT是对应于SCG或者STAG的TAT。
图2是本发明涉及的用户设备的简要结构框图。如图2所示，该用户设备UE200包括处理器201和存储器202。处理器201例如可以包括微处理器、微控制器、嵌入式处理器等。存储器202例如可以包括易失性存储器(如随机存取存储器RAM)、硬盘驱动器(HDD)、非易失性存储器(如闪速存储器)、或其他存储器等。存储器202上存储有程序指令。该指令在由处理器201运行时，可以执行本发明详细描述的由用户设备执行的上述方法。
运行在根据本发明的设备上的程序可以是通过控制中央处理单元(CPU)来使计算机实现本发明的实施例功能的程序。该程序或由该程序处理的信息可以临时存储在易失性存储器(如随机存取存储器RAM)、硬盘驱动器(HDD)、非易失性存储器(如闪速存储器)、或其他存储器系统中。
用于实现本发明各实施例功能的程序可以记录在计算机可读记录介质上。可以通过使计算机系统读取记录在所述记录介质上的程序并执行这些程序来实现相应的功能。此处的所谓“计算机系统”可以是嵌入在该设备中的计算机系统，可以包括操作系统或硬件(如外围设备)。“计算机可读记录介质”可以是半导体记录介质、光学记录介质、磁性记录介质、短时动态存储程序的记录介质、或计算机可读的任何其他记录介质。
用在上述实施例中的设备的各种特征或功能模块可以通过电路(例如，单片或多片集成电路)来实现或执行。设计用于执行本说明书所描述的功能的电路可以包括通用处理器、数字信号处理器(DSP)、专用集成电路(ASIC)、现场可编程门阵列(FPGA)、或其他可编程逻辑器件、分立的门或晶体管逻辑、分立的硬件组件、或上述器件的任意组合。通用处理器可以是微处理器，也可以是任何现有的处理器、控制器、微控制器、或状态机。上述电路可以是数字电路，也可以是模拟电路。因半导体技术的进步而出现了替代现有集成电路的新的集成电路技术的情况下，本发明的一个或多个实施例也可以使用这些新的集成电路技术来实现。
此外，本发明并不局限于上述实施例。尽管已经描述了所述实施例的 各种示例，但本发明并不局限于此。安装在室内或室外的固定或非移动电子设备可以用作终端设备或通信设备，如AV设备、厨房设备、清洁设备、空调、办公设备、自动贩售机、以及其他家用电器等。
如上，已经参考附图对本发明的实施例进行了详细描述。但是，具体的结构并不局限于上述实施例，本发明也包括不偏离本发明主旨的任何设计改动。另外，可以在权利要求的范围内对本发明进行多种改动，通过适当地组合不同实施例所公开的技术手段所得到的实施例也包含在本发明的技术范围内。此外，上述实施例中所描述的具有相同效果的组件可以相互替代。

Claims (10)

  1. 一种由用户设备执行的方法，是被配置了双连接或者多连接的用户设备UE在与主小区组MCG以及辅小区组SCG进行通信的过程中所执行的方法，包括如下步骤：
    UE接收激活SCG的指示信息，该激活SCG的指示信息携带在MAC CE中或者是物理层的信令中或者是RRC消息中；
    UE确定是否采用无随机接入方式来执行SCG激活；
    在UE确定采用无随机接入方式来执行SCG激活的情况下，UE基于无随机接入方式激活SCG，并监听PDCCH。
  2. 根据权利要求1所述的由用户设备执行的方法，其中，还包括如下步骤：
    UE启动或者重新启动与时间提前量TA相关联的定时器TAT。
  3. 根据权利要求1或2所述的由用户设备执行的方法，其中，还包括如下步骤：
    UE启动SCG激活管理定时器。
  4. 根据权利要求3所述的由用户设备执行的方法，其中，
    当UE接收到以UE的C-RNTI为目标地址的PDCCH时，UE停止SCG激活管理定时器。
  5. 根据权利要求3所述的由用户设备执行的方法，其中，
    在UE接收到以UE的C-RNTI为目标地址的PDCCH之前，或者是SCG激活管理定时器正在运行期间，当发生和SCG相关的TAT运行超时的情况，那么UE向上层指示基于无随机接入的SCG激活发生失败。
  6. 根据权利要求3所述的由用户设备执行的方法，其中，
    在UE接收到以UE的C-RNTI为目标地址的PDCCH之前，或者是SCG激活管理定时器正在运行期间，当发生和SCG相关的TAT运行超时的情况，那么UE在MAC层触发用于激活SCG的随机接入流程。
  7. 根据权利要求5或6所述的由用户设备执行的方法，其中，还包括如下步骤：
    UE停止SCG激活管理定时器。
  8. 根据权利要求1或2所述的由用户设备执行的方法，其中，
    UE基于激活SCG的指示信息来确定是否采用无随机接入方式，该激活SCG的指示信息中包含指示UE采用无随机接入方式的信息；或者是，
    UE在接收到激活SCG的指示信息之后基于判定来确定是否采用无随机接入方式，上述判定的依据是TAT正在运行，或者是没有被检测到的波束失败，或者是没有被触发的波束失败恢复，或者是SCG主服务小区的链路质量高于预先设定的门限值。
  9. 根据权利要求8所述的由用户设备执行的方法，其中，
    在激活SCG的指示信息中设置一个比特位，基于该比特位的取值来确定是否采用无随机接入方式；或者是，
    基于在激活SCG的指示信息中是否携带了随机接入的相关信息来确定是否采用无随机接入方式。
  10. 一种用户设备，包括：
    处理器；以及
    存储器，所述存储器上存储有指令，
    所述指令在由所述处理器运行时，使所述用户设备执行根据权利要求1-9中任一项所述的方法。
PCT/CN2022/117224 2021-09-08 2022-09-06 由用户设备执行的方法及用户设备 WO2023036120A1 (zh)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
CN202111053181.0A CN115776734A (zh) 2021-09-08 2021-09-08 由用户设备执行的方法及用户设备
CN202111053181.0 2021-09-08

Publications (1)

Publication Number Publication Date
WO2023036120A1 true WO2023036120A1 (zh) 2023-03-16

Family

ID=85388191

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/CN2022/117224 WO2023036120A1 (zh) 2021-09-08 2022-09-06 由用户设备执行的方法及用户设备

Country Status (2)

Country Link
CN (1) CN115776734A (zh)
WO (1) WO2023036120A1 (zh)

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN112399528A (zh) * 2019-08-15 2021-02-23 华为技术有限公司 基于双连接配置的通信方法、装置、设备及存储介质
CN113170524A (zh) * 2018-12-04 2021-07-23 高通股份有限公司 在辅小区组暂停中的上行链路活动
CN113301611A (zh) * 2020-02-21 2021-08-24 华为技术有限公司 通信方法及装置

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN113170524A (zh) * 2018-12-04 2021-07-23 高通股份有限公司 在辅小区组暂停中的上行链路活动
CN112399528A (zh) * 2019-08-15 2021-02-23 华为技术有限公司 基于双连接配置的通信方法、装置、设备及存储介质
CN113301611A (zh) * 2020-02-21 2021-08-24 华为技术有限公司 通信方法及装置

Non-Patent Citations (2)

* Cited by examiner, † Cited by third party
Title
ERICSSON: "Efficient SCG (de)activation", 3GPP DRAFT; R2-2108388, 3RD GENERATION PARTNERSHIP PROJECT (3GPP), MOBILE COMPETENCE CENTRE ; 650, ROUTE DES LUCIOLES ; F-06921 SOPHIA-ANTIPOLIS CEDEX ; FRANCE, vol. RAN WG2, no. Electronic meeting; 20210809 - 20210827, 5 August 2021 (2021-08-05), Mobile Competence Centre ; 650, route des Lucioles ; F-06921 Sophia-Antipolis Cedex ; France , XP052032562 *
HUAWEI: "[Post114-e][231][R17 DCCA] SCG activation/deactivation options (Huawei)", 3GPP DRAFT; R2-2108444, 3RD GENERATION PARTNERSHIP PROJECT (3GPP), MOBILE COMPETENCE CENTRE ; 650, ROUTE DES LUCIOLES ; F-06921 SOPHIA-ANTIPOLIS CEDEX ; FRANCE, vol. RAN WG2, no. Online; 20210809 - 20210827, 17 August 2021 (2021-08-17), Mobile Competence Centre ; 650, route des Lucioles ; F-06921 Sophia-Antipolis Cedex ; France , XP052042945 *

Also Published As

Publication number Publication date
CN115776734A (zh) 2023-03-10

Similar Documents

Publication Publication Date Title
JP7352039B2 (ja) 無線リソース制御（ｒｒｃ）インアクティブ状態での小規模データ伝送
US9887828B2 (en) Component carrier activation/deactivation in multi carrier systems
JP2022058957A (ja) 無線端末、基地局、及びこれらの方法
US10986592B2 (en) Method related to power headroom report of user, user equipment, base station, and computer-readable medium
US20230171838A1 (en) Method performed by user equipment, and user equipment
WO2019179514A1 (zh) 在用户设备上运行的方法及用户设备
WO2021139620A1 (zh) 由用户设备执行的方法及用户设备
WO2021233088A1 (zh) 由用户设备执行的方法及用户设备
WO2022127778A1 (zh) 由用户设备执行的方法及用户设备
WO2021114743A1 (zh) 由用户设备执行的方法及用户设备
WO2018145558A1 (zh) 数据传输方法及装置
WO2019194296A1 (ja) 通信制御方法
JP2023165045A (ja) 端末装置、基地局装置および、方法
WO2023036120A1 (zh) 由用户设备执行的方法及用户设备
WO2021244387A1 (zh) 由用户设备执行的方法及用户设备
EP4104342B1 (en) Conditionally handling hybrid automatic repeat request process in configuration grant activation procedure
WO2020192729A1 (zh) 随机接入方法以及用户设备
JP2023102794A (ja) 端末装置、方法、および、集積回路
WO2023001191A1 (zh) 由用户设备执行的方法及用户设备
US20230292392A1 (en) Terminal apparatus, base station apparatus, and method
WO2023005895A1 (zh) 执行用户设备辅助信息发送过程的方法及用户设备
WO2023204307A1 (ja) 端末装置、方法、および集積回路
WO2024094121A1 (zh) 由用户设备执行的方法以及用户设备
US20230040421A1 (en) User equipment and method for performing configured grant based small data transmission
WO2023243571A1 (ja) 端末装置、方法、および、集積回路

Legal Events

Date Code Title Description
121 Ep: the epo has been informed by wipo that ep was designated in this application

Ref document number: 22866583

Country of ref document: EP

Kind code of ref document: A1

NENP Non-entry into the national phase

Ref country code: DE