CN113395789A - Method and device for activating auxiliary cell group, storage medium, UE (user Equipment) and base station - Google Patents

Method and device for activating auxiliary cell group, storage medium, UE (user Equipment) and base station Download PDF

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Publication number
CN113395789A
CN113395789A CN202010172209.1A CN202010172209A CN113395789A CN 113395789 A CN113395789 A CN 113395789A CN 202010172209 A CN202010172209 A CN 202010172209A CN 113395789 A CN113395789 A CN 113395789A
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cell group
signaling
secondary cell
serving cells
timing advance
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CN113395789B (en
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韩传华
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Spreadtrum Communications Shanghai Co Ltd
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Spreadtrum Communications Shanghai Co Ltd
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    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W76/00—Connection management
    • H04W76/20—Manipulation of established connections
    • H04W76/27—Transitions between radio resource control [RRC] states
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L5/00—Arrangements affording multiple use of the transmission path
    • H04L5/003—Arrangements for allocating sub-channels of the transmission path
    • H04L5/0048—Allocation of pilot signals, i.e. of signals known to the receiver
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L5/00—Arrangements affording multiple use of the transmission path
    • H04L5/0091—Signaling for the administration of the divided path
    • H04L5/0092—Indication of how the channel is divided
    • 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
    • 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

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

Abstract

A method and a device for activating a secondary cell group, a storage medium, a UE and a base station are provided, the method comprises the following steps: receiving a signaling for deactivating a secondary cell group, the signaling for deactivating the secondary cell group indicating whether the timing advance of one or more serving cells in the secondary cell group needs to be maintained; if the signaling for deactivating the secondary cell group indicates that the timing advance of one or more serving cells needs to be maintained, transmitting a channel sounding reference signal in the corresponding serving cell when the secondary cell group is in a deactivated state, wherein the secondary node adjusts the timing advance of the one or more serving cells according to the channel sounding reference signal; and receiving an activation signaling of the secondary cell group, and activating the secondary cell group according to the activation signaling of the secondary cell group. By the scheme, the problem of large delay caused by random access of the UE in the PSCell when the SCG is activated is solved.

Description

Method and device for activating auxiliary cell group, storage medium, UE (user Equipment) and base station
Technical Field
The invention relates to the field of communication, in particular to a method and a device for activating an auxiliary cell group, a storage medium, UE and a base station.
Background
In the EUTRA-NR Dual Connection (EN-DC) defined by 5G, the EN-DC, the power consumption of the User Equipment (UE) and the network is a big problem because two Radio links of Long Term Evolution (LTE) and New Radio (NR) are maintained at the same time. In some cases, NR UEs consume 3 to 4 times more power than LTE UEs. In an EN-DC deployment, a Master Node (MN for short) provides basic coverage. When the data rate requirement is low and data transmission through a Secondary Cell Group (SCG for short) is not needed, the SCG may be deactivated to save power consumption. If the SCG is deactivated and data needs to be transmitted through the SCG, the SCG can be activated quickly. This efficient SCG deactivation/activation mechanism is also applicable to other Multi-Radio Dual Connectivity (MR-DC) options.
In the prior art, after the SCG is deactivated or called as dormant and suspended (suspend), the UE stops monitoring a Physical Downlink Control Channel (PDCCH) in a Primary Cell (PSCell) of the SCG, but continues to perform measurement of Channel State Information (CSI), measurement of Radio Resource Management (RRM), and beam (beam) Management.
However, in the prior art, the network cannot maintain the ta (timing advance) of the UE in the PSCell. When a Network (Network, NW for short) reactivates an SCG in a deactivated state, a random access needs to be performed in a PSCell to obtain a correct TA, which may increase access delay.
Disclosure of Invention
The invention solves the technical problem of how to overcome the delay problem existing in the prior art when the network reactivates the SCG.
To solve the above technical problem, an embodiment of the present invention provides a method for activating a secondary cell group, including: receiving a signaling for deactivating a secondary cell group, the signaling for deactivating the secondary cell group indicating whether the timing advance of one or more serving cells in the secondary cell group needs to be maintained; if the signaling for deactivating the secondary cell group indicates that the timing advance of one or more serving cells needs to be maintained, transmitting a channel sounding reference signal in the corresponding serving cell when the secondary cell group is in a deactivated state, wherein the secondary node adjusts the timing advance of the one or more serving cells according to the channel sounding reference signal; and receiving an activation signaling of the secondary cell group, and activating the secondary cell group according to the activation signaling of the secondary cell group.
Optionally, the activation signaling of the secondary cell group indicates whether random access is performed in the PSCell or not.
Optionally, when the activation signaling of the secondary cell group indicates that random access is not performed in the PSCell, a response signaling is generated according to an activation result, and the response signaling is sent, so that the secondary node schedules the UE in the secondary cell group according to the response signaling.
Optionally, the one or more serving cells are pscells, or pscells and one or more scells.
Optionally, when an SCell is included in the one or more serving cells, the signaling for deactivating the secondary cell group further indicates an index of the SCell or an identification of a corresponding timing advance group.
Optionally, the channel sounding reference signal is sent periodically.
Optionally, the signaling/activation signaling for deactivating the secondary cell group is at least one of radio resource control signaling, medium access control unit, or physical layer signaling.
Optionally, the method further includes: receiving, by the MN, a media access control unit, the media access control unit configured to adjust timing advance of one or more serving cells.
Optionally, the media access control unit has a logical channel identifier, and identifies a TAG for adjusting timing advance according to the logical channel identifier, where the TAG corresponds to one or more serving cells in the secondary cell group.
The embodiment of the invention also provides an activation method of the auxiliary cell group, which comprises the following steps: sending a signaling for deactivating an auxiliary cell group to a UE (user equipment), wherein the signaling for deactivating the auxiliary cell group indicates whether the timing advance of one or more serving cells in the auxiliary cell group needs to be maintained, if the signaling for deactivating the auxiliary cell group indicates that the timing advance of one or more serving cells needs to be maintained, the UE still sends a channel sounding reference signal in the serving cells when the auxiliary cell group is in a deactivated state, and an auxiliary node adjusts the timing advance of one or more serving cells according to the channel sounding reference signal; and sending an activation signaling of the secondary cell group to the UE so that the UE activates the secondary cell group according to the activation signaling of the secondary cell group.
Optionally, the UE is indicated in the activation signaling of the secondary cell group to perform random access in the PSCell or not.
Optionally, when the activation signaling of the secondary cell group indicates that random access is not performed in the PSCell, receiving a response signaling sent by the UE, and scheduling the UE in the secondary cell group according to the response signaling; wherein the response signaling is generated by the UE according to the activation result.
Optionally, the one or more serving cells are pscells, or pscells and one or more scells.
Optionally, when an SCell is included in the one or more serving cells, the signaling for deactivating the secondary cell group further indicates an index of the SCell or an identification of a corresponding timing advance group.
Optionally, the channel sounding reference signal is sent periodically.
Optionally, the signaling/activation signaling for deactivating the secondary cell group is at least one of radio resource control signaling, medium access control unit, or physical layer signaling.
Optionally, the method further includes: and when the timing advance of the serving cell needs to be adjusted, sending a media access control unit for adjusting the timing advance of one or more serving cells.
Optionally, the media access control unit has a logical channel identifier, so that the UE identifies a TAG for adjusting the timing advance according to the logical channel identifier, where the TAG corresponds to one or more serving cells in the secondary cell group.
The embodiment of the invention also provides a device for activating the auxiliary cell group, which comprises: a deactivation module, configured to receive a signaling for deactivating a secondary cell group, where the signaling for deactivating the secondary cell group indicates whether a timing advance of one or more serving cells in the secondary cell group needs to be maintained; a timing advance maintenance module, configured to send a channel sounding reference signal in a corresponding serving cell when the secondary cell group is in a deactivated state if the signaling for deactivating the secondary cell group indicates that timing advances of one or more serving cells need to be maintained, where the secondary node adjusts the timing advances of the one or more serving cells according to the channel sounding reference signal; and the activation signaling receiving module is used for receiving the activation signaling of the auxiliary cell group and activating the auxiliary cell group according to the activation signaling of the auxiliary cell group.
The embodiment of the invention also provides a device for activating the auxiliary cell group, which comprises: a deactivation signaling sending module, configured to send a signaling for deactivating the secondary cell group to the UE, where the signaling for deactivating the secondary cell group indicates whether the timing advance of the one or more serving cells in the secondary cell group needs to be maintained, and if the signaling for deactivating the secondary cell group indicates that the timing advance of the one or more serving cells needs to be maintained, the UE still sends a channel sounding reference signal in the serving cell when the secondary cell group is in a deactivated state, and the secondary node adjusts the timing advance of the one or more serving cells according to the channel sounding reference signal; and the activation signaling sending module is used for sending the activation signaling of the auxiliary cell group to the UE so that the UE activates the auxiliary cell group according to the activation signaling of the auxiliary cell group.
The embodiment of the invention also provides a storage medium, wherein a computer program is stored on the storage medium, and when being executed by a processor, the computer program realizes the steps of the method for activating any one of the auxiliary cell groups.
The embodiment of the invention also provides the UE, which comprises a memory and a processor, wherein the memory stores a computer program, and the processor realizes the steps of the method for activating the auxiliary cell group when executing the computer program.
The embodiment of the invention also provides a base station, which comprises a memory and a processor, wherein the memory stores a computer program, and the processor realizes the steps of the method for activating the auxiliary cell group when executing the computer program.
Compared with the prior art, the technical scheme of the embodiment of the invention has the following beneficial effects:
the embodiment of the invention provides an activation method of an auxiliary cell group, which comprises the following steps: receiving a signaling for deactivating a secondary cell group, the signaling for deactivating the secondary cell group indicating whether the timing advance of one or more serving cells in the secondary cell group needs to be maintained; if the signaling for deactivating the secondary cell group indicates that the timing advance of one or more serving cells needs to be maintained, transmitting a channel sounding reference signal in the corresponding serving cell when the secondary cell group is in a deactivated state, wherein the secondary node adjusts the timing advance of the one or more serving cells according to the channel sounding reference signal; and receiving an activation signaling of the secondary cell group, and activating the secondary cell group according to the activation signaling of the secondary cell group. Compared with the prior art, the network can instruct the UE to deactivate/activate the SCG by deactivating the signaling or activating the signaling of the auxiliary cell group, and when the UE does not transmit data, the SCG is deactivated to reduce power consumption and save resources. In addition, when the SCG is in the deactivated state, the UE still transmits SRS in one or more serving cells to maintain the TA of the corresponding serving cell, so that when the SCG is activated, the TA of the PSCell does not need to be updated again, thereby overcoming the problem of large delay caused by random access of the UE to the PSCell when the SCG is activated.
Further, the activation signaling of the SCG may also indicate whether the UE performs random access in the PSCell when the SCG is deactivated and then transited to the active state.
Further, the one or more serving cells are pscells, or pscells and one or more scells, and the scells and pscells are in different Timing Advance Groups (TAGs).
Further, the SN receives an SRS sent by the UE in one or more serving cells, and determines whether the TA of the UE in the one or more serving cells changes, and when the TA changes, the SN needs to update the TA. And if the SN judges that the TA needs to be updated, the SN sends the MAC CE for adjusting the TA to the UE through the MN.
Drawings
Fig. 1 is a flowchart illustrating a method for activating a secondary cell group according to an embodiment of the present invention;
fig. 2 is a flowchart illustrating another method for activating a secondary cell group according to an embodiment of the present invention;
fig. 3 is a schematic structural diagram of an apparatus for activating a secondary cell group according to an embodiment of the present invention;
fig. 4 is a schematic structural diagram of an apparatus for activating a secondary cell group according to another embodiment of the present invention.
Detailed Description
The inventor finds that, when the SCG is deactivated, the network cannot maintain the Timing Advance (TA) of the UE in the PSCell. When the network reactivates the SCG in the deactivated state, if the TA of the UE in the PSCell changes, a random access in the PSCell is required to obtain a correct TA, which may increase the access delay.
To solve the problem, an embodiment of the present invention provides a method for activating a secondary cell group, including: receiving a signaling for deactivating a secondary cell group, the signaling for deactivating the secondary cell group indicating whether the timing advance of one or more serving cells in the secondary cell group needs to be maintained; if the signaling for deactivating the secondary cell group indicates that the timing advance of one or more serving cells needs to be maintained, transmitting a channel sounding reference signal in the corresponding serving cell when the secondary cell group is in a deactivated state, wherein the secondary node adjusts the timing advance of the one or more serving cells according to the channel sounding reference signal; and receiving an activation signaling of the secondary cell group, and activating the secondary cell group according to the activation signaling of the secondary cell group.
By the method, the problem of delay caused by random access of the UE in the PSCell when the network reactivates the SCG can be solved.
In order to make the aforementioned objects, features and advantages of the present invention comprehensible, embodiments accompanied with figures are described in detail below.
In order to solve the above technical problem, an embodiment of the present invention provides a method for activating a secondary cell group, where the method may be performed by a UE side. For example, it may be performed by a UE capable of operating under EN-DC dual connectivity. Referring to fig. 1, the method may include the following steps S101 to S103, wherein:
step S101, receiving a signaling for deactivating the auxiliary cell group, wherein the signaling for deactivating the auxiliary cell group indicates whether the timing advance of one or more service cells in the auxiliary cell group needs to be maintained.
Step S102, if the signaling for deactivating the auxiliary cell group indicates that the timing advance of one or more service cells needs to be maintained, the auxiliary node sends a channel detection reference signal in the corresponding service cell when the auxiliary cell group is in a deactivated state, wherein the auxiliary node adjusts the timing advance of the one or more service cells according to the channel detection reference signal.
The signaling for deactivating the secondary cell group (hereinafter referred to as SCG) is sent to the UE by the network and is used for transferring the secondary cell group in which the UE is located to a deactivated state.
When the SCG is switched into the deactivated state, the UE and the network may still maintain the TAs of the one or more serving cells in the SCG, and the network may indicate whether the TAs of the one or more serving cells need to be maintained in the signaling for deactivating the SCG. When the TA of one or more serving cells needs to be maintained is indicated, the UE still sends a channel Sounding Reference Signal (SRS) in the one or more serving cells after the SCG is switched to the deactivated state. A Secondary Node (SN) receives an SRS sent by a UE in one or more serving cells, determines whether a TA of the UE in the one or more serving cells changes, and updates the TA of the corresponding serving cell when the SN determines that the TA changes.
In MR-DC, SCG refers to a set of serving cells associated with SNs, including a PSCell and optionally one or more scells (Secondary cells).
Optionally, the UE receives the signaling for deactivating the SCG, and may turn the PSCell and the SCell of the SCG into a dormant state (still in an activated state but performing a dormant (dormant) behavior, the same applies below), or may turn the PSCell and the SCell of the SCG into a deactivated state, or may turn a part of cells of the SCG into a dormant state, and turn other cells into a deactivated state. The NW understands the state and behavior of the PSCell/SCell consistent with the UE.
Step S103, receiving the activation signaling of the auxiliary cell group, and activating the auxiliary cell group according to the activation signaling of the auxiliary cell group.
The activation signaling is used for switching the activated SCG into an activated state, and the UE and the network can utilize the SCG to perform uplink and downlink data transmission.
By the method, the network can instruct the UE to deactivate/activate the SCG through the signaling for deactivating the auxiliary cell group or the activation signaling, and when the UE does not transmit data, the SCG is deactivated to reduce power consumption and save resources. In addition, when the SCG is in the deactivated state, the UE still transmits SRS in one or more serving cells to maintain the TA of the corresponding serving cell, so that when the SCG is activated, the TA of the PSCell does not need to be updated again, thereby overcoming the problem of large delay caused by random access of the UE to the PSCell when the SCG is activated.
In one embodiment, the activation signaling of the secondary cell group indicates whether random access is performed at the PSCell or not.
Optionally, when the activation signaling of the SCG indicates that random access is not performed in the PSCell, a response signaling is generated according to the activation result, and the response signaling is sent, so that the secondary node schedules the UE in the secondary cell group according to the response signaling.
The SCG activation signaling sent by the network to the UE may also indicate: when the SCG is changed from the deactivated state to the activated state, the UE determines whether the UE needs to perform Random Access (RA) in the PSCell, and when the activation signaling indicates that the UE does not perform Random Access in the PSCell, the UE may generate a response signaling according to the activation result and send the response signaling to the network. The network receives the response signaling and considers that the SCG is activated. The response signaling is a signaling which is sent by the UE to the network and used for informing the network that the UE receives the activation signaling and the activation result of the SCG. In addition, the UE may not send the response signaling, in which case the network considers the SCG to be activated after sending the activation signaling. The secondary node may schedule the UE in the secondary cell group after SCG activation.
Optionally, if the activation signaling of the SCG indicates that the UE performs random access in the PSCell, the SN may schedule the UE when the UE succeeds in randomly accessing the PSCell.
In the above embodiment, the activation signaling of the SCG may further indicate whether the UE performs random access in the PSCell when the SCG changes from deactivation to activation.
Optionally, the one or more serving cells are pscells, or pscells and one or more scells.
The network may instruct the UE to maintain the TA of the PSCell/SCell of the SCG, which SCell and PSCell are in different Timing Advance Groups (TAGs).
Optionally, when an SCell is included in the one or more serving cells, the signaling for deactivating the secondary cell group further indicates an index of the SCell or an identification of a corresponding timing advance group.
When the network needs to maintain the TA of the SCell, the network indicates the index of the SCell or the identification of the TAG of the TA to be maintained in the signaling for deactivating the SCG so as to inform the UE of the SCell of the TA to be maintained. Wherein the identification of the TAG may correspond to one or more scells.
After the UE deactivates the SCG, the SRS is still sent on the SCell, or the SRS is sent on any cell contained in the TAG corresponding to the TAG identification.
Optionally, the channel sounding reference signal is sent periodically.
The UE may set a transmission period of the SRS, and periodically transmit the SRS according to the transmission period to maintain the TAs of one or more serving cells.
Optionally, the signaling/activation signaling for deactivating the secondary cell group is at least one of radio resource control signaling, medium access control unit, or physical layer signaling.
The signaling/activation signaling for deactivating the SCG may be sent to the UE in the form of Radio Resource Control (RRC) signaling, Medium Access Control Element (MAC CE) signaling, or physical layer signaling.
Optionally, the method further includes: receiving, by the MN, a media access control unit, the media access control unit configured to adjust timing advance of one or more serving cells.
The SN receives SRS sent by the UE in one or more service cells, judges whether TA of the UE in a corresponding cell changes or not, and when the TA changes, the SN needs to update the TA. If the SN determines that the TA needs to be updated, because the SN cannot directly send Data to the UE through the PSCell, the SN transfers relevant information to a Master Node (MN), the MN generates an MAC CE for adjusting the TA, the MAC CE is included in an MAC Protocol Data Unit (PDU) and sent to the UE, and the MAC CE is received by the UE and obtains an update status of the corresponding TA.
Optionally, the media access control unit has a logical channel identifier, and identifies a TAG for adjusting timing advance according to the logical channel identifier, where the TAG corresponds to one or more serving cells in the secondary cell group.
The MAC CE includes a Logical Channel Identity (LCID), and the MAC CE for updating the TA sent by the MN to the UE needs to indicate a corresponding SCG instead of an MCG. The UEs may be distinguished by at least the LCID.
The current MAC CE for updating TA is also called Timing Advance Command (TAC) MAC CE, and the UE operates a corresponding MAC entity from which Cell Group (CG) it receives. Therefore, in the present invention, a new LCID is used, and the UE can know the TA of the corresponding TAG of the SCG according to the LCID of the MAC CE.
The embodiment of the present invention further provides an SCG activation method, please refer to fig. 2, the method includes the following steps S201 to S202, wherein:
step S201, sending a signaling for deactivating the auxiliary cell group to the UE, wherein the signaling for deactivating the auxiliary cell group indicates whether the timing advance of one or more service cells in the auxiliary cell group needs to be maintained;
if the signaling for deactivating the secondary cell group indicates that the timing advance of one or more serving cells needs to be maintained, the UE sends a channel sounding reference signal in the serving cell when the secondary cell group is in a deactivated state, and the secondary node adjusts the timing advance of the one or more serving cells according to the channel sounding reference signal;
step S202, sending the activation signaling of the auxiliary cell group to the UE, so that the UE activates the auxiliary cell group according to the activation signaling of the auxiliary cell group.
In one embodiment, the UE is indicated in the activation signaling of the secondary cell group to perform random access at or not at the PSCell.
Optionally, when the activation signaling of the secondary cell group indicates that random access is not performed in the PSCell, receiving a response signaling sent by the UE, and scheduling the UE in the secondary cell group SCG according to the response signaling; wherein the response signaling is generated by the UE according to the activation result.
Optionally, if the activation signaling of the secondary cell group indicates that the UE performs random access in the PSCell, the network may schedule the UE when the UE performs a random access procedure in the PSCell and the access is successful.
Optionally, the one or more serving cells are pscells, or pscells and one or more scells.
In one embodiment, when an SCell is included in the one or more serving cells, the signaling deactivating the secondary cell group further indicates an index of the SCell or an identification of a corresponding timing advance group.
Optionally, the channel sounding reference signal is sent periodically.
Optionally, the signaling/activation signaling for deactivating the secondary cell group is at least one of radio resource control signaling, medium access control unit, or physical layer signaling.
In one embodiment, the method of fig. 2 further comprises: and when the timing advance of one or more serving cells needs to be adjusted, sending a media access control unit for adjusting the timing advance of one or more serving cells.
Optionally, the media access control unit has a logical channel identifier, so that the UE identifies a TAG for adjusting the timing advance according to the logical channel identifier, where the TAG corresponds to one or more serving cells in the secondary cell group.
The activation method of SCG described in fig. 2 may be performed by the base station side, and may be performed by the base station of SN in MR-DC. When the base station of the SN executes the method shown in fig. 2, and when the timing advance of one or more serving cells needs to be adjusted, the mac element for adjusting the timing advance of the corresponding cell is sent, including: when the timing advance of one or more service cells needs to be adjusted, related information for adjusting the timing advance of the corresponding cell is sent to a Main Node (MN), so that the MN generates a media access control unit for adjusting the timing advance of one or more service cells according to the related information and sends the media access control unit to the UE.
For more details of the working principle and working manner of the method for activating the secondary cell group shown in fig. 2, reference may be made to the related description on the network side (or SN) in fig. 1, and details are not repeated here.
An embodiment of the present invention further provides an apparatus for activating a secondary cell group, please refer to fig. 3, where the apparatus includes:
a deactivation module 301, configured to receive a signaling for deactivating a secondary cell group, where the signaling for deactivating the secondary cell group indicates whether a timing advance of one or more serving cells in the secondary cell group needs to be maintained;
a timing advance maintaining module 302, configured to send a channel sounding reference signal in a corresponding serving cell when the secondary cell group is in a deactivated state if the signaling for deactivating the secondary cell group indicates that timing advances of one or more serving cells need to be maintained, where the secondary node adjusts the timing advances of the one or more serving cells according to the channel sounding reference signal;
an activation signaling receiving module 303, configured to receive an activation signaling of a secondary cell group, and activate the secondary cell group according to the activation signaling of the secondary cell group.
For more details of the operation principle and operation manner of the activation apparatus of the secondary cell group in fig. 3, reference may be made to the above description of the activation method of the secondary cell group in fig. 1, and details are not repeated here.
An embodiment of the present invention further provides an apparatus for activating a secondary cell group, please refer to fig. 4, where the apparatus includes:
a deactivation signaling sending module 401, configured to send a signaling for deactivating the secondary cell group to the UE, where the signaling for deactivating the secondary cell group indicates whether the timing advance of one or more serving cells in the secondary cell group needs to be maintained, and if the signaling for deactivating the secondary cell group indicates that the timing advance of one or more serving cells needs to be maintained, the UE still sends a channel sounding reference signal in the serving cell when the secondary cell group is in a deactivated state, and the secondary node adjusts the timing advance of the one or more serving cells according to the channel sounding reference signal;
an activation signaling sending module 402, configured to send an activation signaling of the secondary cell group to the UE, so that the UE activates the secondary cell group according to the activation signaling of the secondary cell group.
For more details of the operation principle and operation manner of the activation apparatus of the secondary cell group in fig. 4, reference may be made to the above description of the activation method of the secondary cell group in fig. 2, and details are not repeated here.
It should be noted that the technical solution of the present invention is applicable to a 5G (5Generation) communication system, a 4G communication system, a 3G communication system, and various future new communication systems, such as 6G, 7G, and the like.
Embodiments of the present invention also provide a storage medium having stored thereon computer instructions, which when executed perform the steps of the method of fig. 1 or fig. 2. The storage medium may be a computer-readable storage medium, and may include, for example, a non-volatile (non-volatile) or non-transitory (non-transitory) memory, and may further include an optical disc, a mechanical hard disk, a solid state hard disk, and the like.
Specifically, in the embodiment of the present invention, the processor may be a Central Processing Unit (CPU), and the processor may also be other 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 devices, discrete hardware components, and the like. A general purpose processor may be a microprocessor or the processor may be any conventional processor or the like.
It will also be appreciated that the memory in the embodiments of the subject application can be either volatile memory or nonvolatile memory, or can include both volatile and nonvolatile memory. The nonvolatile memory may be a read-only memory (ROM), a Programmable ROM (PROM), an Erasable PROM (EPROM), an Electrically Erasable PROM (EEPROM), or a flash memory. Volatile memory can be Random Access Memory (RAM), which acts as external cache memory. By way of example and not limitation, many forms of Random Access Memory (RAM) are available, such as Static RAM (SRAM), Dynamic RAM (DRAM), Synchronous DRAM (SDRAM), double data rate SDRAM (DDR SDRAM), enhanced SDRAM (enhanced SDRAM), SDRAM (SLDRAM), synchlink DRAM (SLDRAM), and direct bus RAM (DR RAM).
The embodiment of the present invention further provides a UE, which includes a memory and a processor, where the memory stores computer instructions capable of running on the processor, and the processor executes the computer instructions to perform the steps of the method shown in fig. 1. The terminal includes, but is not limited to, a mobile phone, a computer, a tablet computer and other terminal devices.
Specifically, a terminal in the embodiments of the present application may refer to various forms of UE, access terminal, subscriber unit, subscriber station, Mobile Station (MS), remote station, remote terminal, mobile device, user terminal, terminal device (terminal equipment), wireless communication device, user agent, or user equipment. The terminal device may also be a cellular phone, a cordless phone, a Session Initiation Protocol (SIP) phone, a Wireless Local Loop (WLL) station, a Personal Digital Assistant (PDA), a handheld device with a Wireless communication function, a computing device or other processing devices connected to a Wireless modem, a vehicle-mounted device, a wearable device, a terminal device in a future 5G Network or a terminal device in a future evolved Public Land Mobile Network (PLMN), and the like, which is not limited in this embodiment.
The embodiment of the present invention further provides a base station, which includes a memory and a processor, where the memory stores computer instructions capable of being executed on the processor, and the processor executes the computer instructions to execute the steps of the method shown in fig. 2.
A Base Station (BS) in the embodiment of the present application, which may also be referred to as a base station device, is a device deployed in a Radio Access Network (RAN) to provide a wireless communication function. For example, a device providing a base station function in a 2G network includes a Base Transceiver Station (BTS), a device providing a base station function in a 3G network includes a node b (nodeb), apparatuses for providing a base station function in a 4G network include evolved node bs (enbs), which, in a Wireless Local Area Network (WLAN), the devices providing the base station function are an Access Point (AP), a device gNB providing the base station function in a New Radio (NR) of 5G, and a node B (ng-eNB) continuing to evolve, the gNB and the terminal communicate with each other by adopting an NR (NR) technology, the ng-eNB and the terminal communicate with each other by adopting an E-UTRA (evolved Universal Terrestrial Radio Access) technology, and both the gNB and the ng-eNB can be connected to a 5G core network. The base station in the embodiment of the present application also includes a device and the like that provide a function of the base station in a future new communication system.
The base station controller in the embodiment of the present application is a device for managing a base station, for example, a Base Station Controller (BSC) in a 2G network, a Radio Network Controller (RNC) in a 3G network, or a device for controlling and managing a base station in a future new communication system.
The network on the network side in the embodiment of the present invention refers to a communication network providing communication services for a terminal, and includes a base station of a radio access network, a base station controller of the radio access network, and a device on the core network side.
Although the present invention is disclosed above, the present invention is not limited thereto. Various changes and modifications may be effected therein by one skilled in the art without departing from the spirit and scope of the invention as defined in the appended claims.

Claims (23)

1. A method for activating a secondary cell group, the method comprising:
receiving a signaling for deactivating a secondary cell group, the signaling for deactivating the secondary cell group indicating whether the timing advance of one or more serving cells in the secondary cell group needs to be maintained;
if the signaling for deactivating the secondary cell group indicates that the timing advance of one or more serving cells needs to be maintained, transmitting a channel sounding reference signal in the corresponding serving cell when the secondary cell group is in a deactivated state, wherein the secondary node adjusts the timing advance of the one or more serving cells according to the channel sounding reference signal;
and receiving an activation signaling of the secondary cell group, and activating the secondary cell group according to the activation signaling of the secondary cell group.
2. The method of claim 1, wherein the activation signaling for the secondary cell group indicates whether random access is performed in a PSCell or not.
3. The method of claim 2, wherein when the activation signaling of the secondary cell group indicates that random access is not performed in the PSCell, a response signaling is generated according to an activation result, and the response signaling is sent, so that the secondary node schedules the UE in the secondary cell group according to the response signaling.
4. A method according to any of claims 1 to 3, wherein the one or more serving cells are PSCells, or PSCells and one or more SCells.
5. The method of claim 4, wherein the signaling deactivating the secondary cell group further indicates an index of the SCell or an identification of a corresponding timing advance group when the SCell is included in the one or more serving cells.
6. The method of claim 1, wherein the channel sounding reference signal is transmitted periodically.
7. The method of claim 1, wherein the signaling/activation signaling deactivating the secondary cell group is at least one of radio resource control signaling, medium access control element, or physical layer signaling.
8. The method of claim 1, further comprising:
receiving, by the MN, a media access control unit, the media access control unit configured to adjust timing advance of one or more serving cells.
9. The method of claim 8, wherein the medium access control element has a logical channel identity, and wherein a TAG for adjusting a timing advance is identified according to the logical channel identity, and wherein the TAG corresponds to one or more serving cells in the secondary cell group.
10. A method for activating a secondary cell group, the method comprising:
sending a signaling for deactivating an auxiliary cell group to a UE (user equipment), wherein the signaling for deactivating the auxiliary cell group indicates whether the timing advance of one or more serving cells in the auxiliary cell group needs to be maintained, if the signaling for deactivating the auxiliary cell group indicates that the timing advance of one or more serving cells needs to be maintained, the UE still sends a channel sounding reference signal in the corresponding serving cell when the auxiliary cell group is in a deactivated state, and an auxiliary node adjusts the timing advance of one or more serving cells according to the channel sounding reference signal;
and sending an activation signaling of the secondary cell group to the UE so that the UE activates the secondary cell group according to the activation signaling of the secondary cell group.
11. The method of claim 10, wherein the activation signaling for the secondary cell group indicates whether the UE performs random access in the PSCell or not.
12. The method of claim 11,
when the activation signaling of the auxiliary cell group indicates that random access is not performed in the PSCell, receiving a response signaling sent by the UE, and scheduling the UE in the auxiliary cell group according to the response signaling;
wherein the response signaling is generated by the UE according to the activation result.
13. A method according to any of claims 10 to 12, wherein the one or more serving cells are pscells or pscells and one or more scells.
14. The method of claim 13, wherein the signaling deactivating the secondary cell group further indicates an index of the SCell or an identification of a corresponding timing advance group when the SCell is included in the one or more serving cells.
15. The method of claim 10, wherein the channel sounding reference signal is transmitted periodically.
16. The method of claim 10, wherein the signaling/activation signaling deactivating the secondary cell group is at least one of radio resource control signaling, medium access control element, or physical layer signaling.
17. The method of claim 10, further comprising:
and when the timing advance of one or more serving cells needs to be adjusted, sending a media access control unit for adjusting the timing advance of one or more serving cells.
18. The method of claim 17, wherein the media access control element has a logical channel identity, such that the UE identifies a TAG for adjusting timing advance according to the logical channel identity, the TAG corresponding to one or more serving cells in the secondary cell group.
19. An apparatus for activating a secondary cell group, the apparatus comprising:
a deactivation module, configured to receive a signaling for deactivating a secondary cell group, where the signaling for deactivating the secondary cell group indicates whether a timing advance of one or more serving cells in the secondary cell group needs to be maintained;
a timing advance maintenance module, configured to send a channel sounding reference signal in a corresponding serving cell when the secondary cell group is in a deactivated state if the signaling for deactivating the secondary cell group indicates that timing advances of one or more serving cells need to be maintained, where the secondary node adjusts the timing advances of the one or more serving cells according to the channel sounding reference signal;
and the activation signaling receiving module is used for receiving the activation signaling of the auxiliary cell group and activating the auxiliary cell group according to the activation signaling of the auxiliary cell group.
20. An apparatus for activating a secondary cell group, the apparatus comprising:
a deactivation signaling sending module, configured to send a signaling for deactivating the secondary cell group to the UE, where the signaling for deactivating the secondary cell group indicates whether the timing advance of the one or more serving cells in the secondary cell group needs to be maintained, and if the signaling for deactivating the secondary cell group indicates that the timing advance of the one or more serving cells needs to be maintained, the UE still sends a channel sounding reference signal in the corresponding serving cell when the secondary cell group is in a deactivated state, and the secondary node adjusts the timing advance of the one or more serving cells according to the channel sounding reference signal;
and the activation signaling sending module is used for sending the activation signaling of the auxiliary cell group to the UE so that the UE activates the auxiliary cell group according to the activation signaling of the auxiliary cell group.
21. A storage medium having stored thereon a computer program for implementing the steps of the method of any one of claims 1 to 9, or of any one of claims 10 to 18, when executed by a processor.
22. A UE comprising a memory and a processor, the memory storing a computer program, wherein the processor implements the steps of the method of any one of claims 1 to 9 when executing the computer program.
23. A base station comprising a memory and a processor, the memory storing a computer program, wherein the processor implements the steps of the method of any one of claims 10 to 18 when executing the computer program.
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