CN115334599A - Cell switching and control method and device thereof - Google Patents
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Abstract
The application discloses a cell switching and control method and device thereof, which are used for realizing a conditional PCell switching scene with PSCell addition or change. The cell switching control method provided by the application comprises the following steps: if determining that the condition PCell switching with the addition or change of the PSCell is configured, the network side equipment sends a Radio Resource Control (RRC) reconfiguration message carrying one or more pieces of condition reconfiguration configuration information to the terminal; the RRC reconfiguration message is used for instructing the terminal to evaluate the candidate PCell cells and/or the candidate PSCell cells based on the execution conditions in the conditional reconfiguration information, and initiating access to the corresponding candidate cells after the candidate PCell cells and/or the candidate PSCell cells meeting the execution conditions are found by evaluation.
Description
Technical Field
The present application relates to the field of communications technologies, and in particular, to a cell switching method and a cell switching control device.
Background
The main ideas of the prior art regarding Conditional Handover (CHO), or Conditional PSCell addition/Change (CPAC) Handover:
in order to improve the robustness and reliability of the movement, conditional handover and a change in PSCell (Primary Secondary cell) condition within a Secondary Node (SN) without participation of a Master Node (MN) are introduced in release 16 (R16), a change in PSCell condition between SNs, and conditional PSCell addition are introduced in R17.
Whether the conditions of the PSCell in the CHO, the SN are changed, the conditions of the PSCell between the SNs are changed, or the conditions of the PSCell addition are added, the main idea is that the network side device pre-configures a plurality of target cells for the UE, i.e. the configuration information and the execution conditions of the target cells are sent to the UE in advance. After receiving the configuration information of the target cell, the UE does not execute the handover or PSCell change or PSCell addition as in the conventional handover, PSCell change (change) or PSCell addition, but stores the received configuration, and performs measurement and evaluation on the candidate configured cells, until there is a cell satisfying the execution condition, the UE executes the stored reconfiguration message corresponding to the cell, performs the corresponding handover or PSCell change or PSCell addition process, i.e., completes the downlink synchronization and triggers the random access process to access the target PCell or PSCell.
R16 only supports the network side device to configure CHO or CPAC for the UE alone, that is, the UE only determines whether the PCell (Primary Cell) handover condition is satisfied when configuring CHO, so that only the PCell handover process (also referred to as conditional PCell handover) is performed, that is, the PCell handover process is not accompanied by PSCell addition or change, or only determines whether the execution condition of PSCell addition or change is satisfied when configuring CPAC, so that only the PSCell addition or change process is performed, that is, the PSCell addition or change process is not accompanied by the conditional PCell handover process.
The execution condition is as follows:
for CHO, and R17 CPAC, the network may configure a similar A3/A5 execution condition:
a3 execution conditions: the measurement quality offset of the candidate target cell is superior to PCell/PSCell;
a5 execution conditions: the measurement quality of the PCell/PSCell becomes worse than a preset absolute threshold, and the measurement quality of the candidate target cell becomes better than another preset absolute threshold;
these above execution conditions are all implemented based on cell-level measurement quality indicators.
In the prior art regarding CHO and CPAC, the current protocol only supports the network side device to configure CHO or CPAC individually, i.e. the UE can only complete PCell handover when performing CHO, and does not accompany PSCell addition or change, i.e. does not support PSCell addition or change while performing conditional PCell handover.
Disclosure of Invention
The embodiment of the application provides a cell switching method and a cell switching control device, which are used for realizing a conditional PCell switching scene with addition or change of a PSCell, so that MRDC is established while PCell switching is carried out, time delay for establishing MRDC is reduced, network throughput is improved, and mobility management of the PSCell is completed while PCell connection is maintained.
In a network side device, a cell handover control method provided in an embodiment of the present application includes:
if the network side equipment determines to configure the conditional PCell switching with the addition or change of the PSCell, the network side equipment sends a Radio Resource Control (RRC) reconfiguration message carrying one or more pieces of conditional reconfiguration configuration information to the terminal;
the RRC reconfiguration message is used for instructing the terminal to evaluate the candidate PCell cells and/or the candidate PSCell cells based on the execution conditions in the conditional reconfiguration information, and initiating access to the corresponding candidate cells after the candidate PCell cells and/or the candidate PSCell cells meeting the execution conditions are found by evaluation.
By the method, if the network side equipment determines to configure the conditional PCell switching with the addition or change of the PSCell, the network side equipment sends a Radio Resource Control (RRC) reconfiguration message carrying one or more pieces of conditional reconfiguration configuration information to the terminal; the RRC reconfiguration message is used for instructing the terminal to evaluate the candidate PCell cells and/or the candidate PSCell cells based on the execution conditions in the conditional reconfiguration information, and after the candidate PCell cells and/or the candidate PSCell cells meeting the execution conditions are found by evaluation, access of the corresponding candidate cells is initiated, so that a conditional PCell switching scene with PSCell addition or change is realized, therefore, establishment of MRDC while PCell switching can be further realized, time delay of establishment of MRDC is reduced, network throughput is improved, and mobility management of the PSCell is completed while PCell connection is maintained.
Optionally, the configuration information of conditional reconfiguration includes at least one of:
configuration information for PCell handover, configuration information added or changed by one PSCell, and configuration information related to a corresponding execution condition;
configuration information of PCell handover, configuration information added or changed by at least one PSCell, and corresponding configuration information related to execution conditions.
Optionally, the configuration information related to the execution condition includes one or more execution conditions for conditional reallocation.
Optionally, the execution condition associated measurement target of the conditional reallocation is a candidate PCell cell of a PCell, or the execution condition associated measurement target of the conditional reallocation is a candidate PSCell cell of a PSCell, wherein,
the execution condition of the conditional reconfiguration with the measurement target of PCell is generated by the source MN side;
the execution condition of the conditional reconfiguration with the measurement target being the PSCell is generated by the source MN side or the source SN.
Optionally, the execution condition of the conditional reallocation includes at least one of:
measuring an execution condition;
an indication of a reference measurement configuration;
measuring indication information that the target cell is a PCell or a PSCell;
the identity of the cell group in which the target cell is located is measured.
On a terminal side, a cell switching method provided in an embodiment of the present application includes:
a terminal receives a Radio Resource Control (RRC) reconfiguration message;
acquiring configuration information related to execution conditions configured by network side equipment from the RRC reconfiguration message, wherein the configuration information related to the execution conditions is configured by switching of a conditional primary cell (PCell) with addition or change of a primary cell (PSCell);
determining a measurement evaluation target of an execution condition of the condition reconfiguration in the execution condition-related configuration information;
performing measurement evaluation on the PCell cell and/or the PSCell cell based on the execution condition of the condition reconfiguration with the measurement evaluation target of the PCell and/or the execution condition of the condition reconfiguration with the measurement evaluation target of the PSCell;
and after the candidate PCell cell and/or the candidate PSCell cell meeting the execution condition is evaluated and found, initiating access of the corresponding candidate cell.
Optionally, determining that a measurement evaluation target of the condition reconfiguration execution condition is a PCell and/or a PSCell based on the information of the condition reconfiguration execution condition in the configuration information related to the execution condition, specifically includes:
determining that a measurement evaluation target of the execution condition of the conditional reconfiguration is a PCell, and/or a PSCell by at least one of:
indication information according to the measurement execution condition and the reference measurement configuration;
according to the indication information that the measurement target cell is a PCell or a PSCell;
according to the Cell group ID of the Cell group where the measurement target Cell is located.
Optionally, after the candidate PCell cells and/or candidate PSCell cells that satisfy the execution condition are evaluated and found, initiating access to corresponding candidate cells specifically includes:
if the configuration information related to the execution condition only comprises the execution condition of conditional reallocation with the measurement target being a PCell, or simultaneously comprises the execution condition of conditional reallocation with the measurement target being a PCell and a PSCell; and when the terminal measurement evaluation finds that the execution condition of one candidate PCell is satisfied, executing at least one of the following:
initiating access to a PCell meeting execution conditions, and reporting a first feedback message after successful access, or triggering SCG failure information to be reported to network side equipment;
and initiating access to the PCell meeting the execution condition and the PSCell corresponding to the PCell meeting the execution condition.
Optionally, after the candidate PCell cells and/or the candidate PSCell cells that satisfy the execution condition are evaluated and found, initiating access to corresponding candidate cells specifically includes:
if the configuration information related to the execution condition only comprises the execution condition of the conditional reconfiguration with the measurement target being the PSCell, or simultaneously comprises the execution condition of the conditional reconfiguration with the measurement targets being the PSCell and the PCell; and when the terminal measures and evaluates that the execution condition of one candidate PSCell is satisfied, the terminal executes at least one of the following:
initiating access to PSCells meeting execution conditions, and reporting a second feedback message after successful access, or triggering a master cell group failure message MCG failure information to report to network side equipment;
and initiating access to the PSCells meeting the execution conditions and the PCell corresponding to the PSCells meeting the execution conditions.
Optionally, after the candidate PCell cells and/or the candidate PSCell cells that satisfy the execution condition are evaluated and found, initiating access to corresponding candidate cells specifically includes:
and if the configuration information related to the execution conditions simultaneously contains the execution conditions of conditional reconfiguration with measurement targets of the PSCells and the PCell, and when the terminal measures and evaluates that one candidate PCell and the execution condition of one candidate PScell corresponding to the candidate PCell are simultaneously met, the terminal initiates access to the PCell meeting the execution conditions and the PSCell corresponding to the PCell meeting the execution conditions.
Optionally, the method further comprises: if the configuration information related to the execution condition simultaneously contains the execution conditions of the condition reconfiguration of the measurement targets of the PCell and the PScell, when the terminal evaluates that the execution conditions of the candidate PCell are satisfied but the execution conditions of the candidate PScell corresponding to the candidate PCell are not satisfied; or when the terminal evaluates that the execution condition of the candidate PSCell is satisfied but the execution condition of the candidate PCell corresponding to the candidate PSCell is not satisfied, the terminal continues to perform measurement evaluation on the candidate PCell cell and the candidate PSCell cell based on the execution condition of the condition reconfiguration.
Optionally, the method further comprises:
for the situation that the terminal simultaneously initiates access aiming at the PCell and the PSCell, if the PCell access is successful but the PSCell access is failed, the terminal executes at least one of the following operations: triggering SCG failure to report to the network, triggering RRC reconstruction process, and reporting a first feedback message to the network;
if the PSCell access is successful but the PCell access is failed, the terminal executes at least one of the following operations: and triggering MCG failure to report to the network, triggering RRC reconstruction process and reporting a second feedback message to the network.
Optionally, the first feedback message includes at least one of the following:
indication information that addition or change of the PSCell corresponding to the PCell is not performed;
indication information of a PSCell that failed to execute;
indication information for performing only handover of the PCell;
identification information of PSCell and/or cell group identification information that failed to execute.
Optionally, the second feedback message includes at least one of the following:
indication information that the switching of the PCell corresponding to the PSCell is not executed;
indication information of a PCell for which execution failed;
only the indication information of the change or addition of the PSCell is performed.
In a network side device, a cell switching control apparatus provided in an embodiment of the present application includes:
a memory for storing program instructions;
a processor for calling the program instructions stored in the memory and executing according to the obtained program:
if determining that the condition PCell switching with the addition or change of the PSCell is configured, sending a Radio Resource Control (RRC) reconfiguration message carrying one or more pieces of condition reconfiguration configuration information to the terminal;
the RRC reconfiguration message is used for instructing the terminal to evaluate the candidate PCell cells and/or the candidate PSCell cells based on the execution conditions in the conditional reconfiguration information, and initiating access to the corresponding candidate cells after the candidate PCell cells and/or the candidate PSCell cells meeting the execution conditions are found by evaluation.
Optionally, the configuration information of conditional reconfiguration includes at least one of:
configuration information for PCell handover, configuration information added or changed by one PSCell, and configuration information related to a corresponding execution condition;
configuration information of PCell handover, configuration information added or changed by at least one PSCell, and corresponding configuration information related to execution conditions.
Optionally, the configuration information related to the execution condition includes one or more execution conditions for conditional reallocation;
the execution condition association measurement target of the conditional reassortment is a candidate PCell cell of a PCell, or the execution condition association measurement target of the conditional reassortment is a candidate PSCell cell of a PSCell, wherein,
the execution condition of the conditional reconfiguration with the measurement target of PCell is generated by the source MN side;
the execution condition of the condition reconfiguration with the measurement target of the PSCell is generated by a source MN side or a source SN;
the execution condition of the conditional reconfiguration includes at least one of:
measuring an execution condition;
an indication of a reference measurement configuration;
measuring indication information that the target cell is a PCell or a PSCell;
the identity of the cell group in which the target cell is located is measured.
On a terminal side, a cell switching apparatus provided in an embodiment of the present application includes:
a memory for storing program instructions;
a processor for calling the program instructions stored in the memory and executing according to the obtained program:
receiving a Radio Resource Control (RRC) reconfiguration message;
acquiring configuration information related to an execution condition configured by network side equipment from the RRC reconfiguration message, wherein the configuration information related to the execution condition is configured for switching a conditional primary cell (PCell) with addition or change of a primary cell (PSCell) and a secondary cell (PSCell);
determining a measurement evaluation target of an execution condition of the condition reconfiguration in the execution condition-related configuration information;
performing measurement evaluation on the PCell cell and/or the PSCell cell based on the execution condition of the condition reconfiguration with the measurement evaluation target of the PCell and/or the execution condition of the condition reconfiguration with the measurement evaluation target of the PSCell;
and after the candidate PCell cell and/or the candidate PSCell cell meeting the execution condition are/is evaluated and found, initiating the access of the corresponding candidate cell.
Optionally, determining that a measurement evaluation target of the conditional reallocation execution condition is a PCell and/or a PSCell based on the information of the conditional reallocation execution condition in the configuration information related to the execution condition, specifically including:
determining that a measurement evaluation target of the execution condition of the conditional reconfiguration is a PCell, and/or a PSCell by at least one of:
indication information according to the measurement execution condition and the reference measurement configuration;
according to the indication information that the measurement target cell is a PCell or a PSCell;
according to the Cell group ID of the Cell group where the measurement target Cell is located.
Optionally, after the candidate PCell cells and/or the candidate PSCell cells that satisfy the execution condition are evaluated and found, initiating access to corresponding candidate cells specifically includes:
if the configuration information related to the execution condition only comprises the execution condition of conditional reallocation with the measurement target being a PCell, or simultaneously comprises the execution condition of conditional reallocation with the measurement target being a PCell and a PSCell; and when the measurement evaluation finds that the execution condition of one candidate PCell is satisfied, executing at least one of the following steps:
initiating access to a PCell meeting execution conditions, and reporting a first feedback message after successful access, or triggering SCG failure information to be reported to network side equipment;
and initiating access to the PCell meeting the execution condition and the PSCell corresponding to the PCell meeting the execution condition.
Optionally, after the candidate PCell cells and/or candidate PSCell cells that satisfy the execution condition are evaluated and found, initiating access to corresponding candidate cells specifically includes:
if the configuration information related to the execution condition only includes the execution condition of the conditional reallocation of which the measurement target is the PSCell, or includes the execution condition of the conditional reallocation of which the measurement targets are the PSCell and the PCell; and when the measurement evaluation finds that the execution condition of one candidate PSCell is satisfied, the terminal executes at least one of the following:
initiating access to PSCells meeting execution conditions, and reporting a second feedback message after successful access, or triggering a master cell group failure message MCG failure information to report to network side equipment;
and initiating access to the PSCells meeting the execution conditions and the PCell corresponding to the PSCells meeting the execution conditions.
Optionally, after the candidate PCell cells and/or the candidate PSCell cells that satisfy the execution condition are evaluated and found, initiating access to corresponding candidate cells specifically includes:
and if the configuration information related to the execution condition simultaneously contains the execution conditions of the condition reconfiguration with the measurement targets of the PSCells and the PCell, and when the measurement evaluation finds that the execution conditions of one candidate PCell and one candidate PScell corresponding to the candidate PCell are simultaneously satisfied, initiating access to the PCell satisfying the execution conditions and the PScell corresponding to the PCell satisfying the execution conditions.
In a network side device, another cell handover control apparatus provided in an embodiment of the present application includes:
a determining unit, configured to determine that a conditional PCell handover with PSCell addition or change needs to be configured;
a sending unit, configured to send a radio resource control, RRC, reconfiguration message carrying one or more pieces of conditional reconfiguration configuration information to a terminal, where the RRC reconfiguration message is used to instruct the terminal to evaluate a candidate PCell cell and/or a candidate PSCell cell based on an execution condition in the conditional reconfiguration configuration information, and initiate access to a corresponding candidate cell after the candidate PCell cell and/or the candidate PSCell cell satisfying the execution condition are/is found by the evaluation.
On the terminal side, another cell switching apparatus provided in the embodiment of the present application includes:
a receiving unit, configured to receive a radio resource control RRC reconfiguration message;
an obtaining unit, configured to obtain, from the RRC reconfiguration message, configuration information related to an execution condition configured by a network side device, where the configuration information related to the execution condition is configured for a conditional primary cell PCell with addition or change of a primary and secondary cell PSCell;
a determination unit configured to determine a measurement evaluation target of an execution condition of the condition reallocation in the execution condition-related configuration information;
the evaluation unit is used for performing measurement evaluation on the PCell cell and/or the PSCell cell based on the execution condition of the condition reconfiguration with the measurement evaluation target being the PCell and/or the execution condition of the condition reconfiguration with the measurement evaluation target being the PSCell;
and the access unit is used for initiating access of the corresponding candidate cell after the candidate PCell cell and/or the candidate PSCell cell meeting the execution condition is evaluated and found.
Another embodiment of the present application provides a computing device, which includes a memory and a processor, wherein the memory is used for storing program instructions, and the processor is used for calling the program instructions stored in the memory and executing any one of the methods according to the obtained program.
Another embodiment of the present application provides a computer storage medium having stored thereon computer-executable instructions for causing a computer to perform any one of the methods described above.
Drawings
In order to more clearly illustrate the technical solutions in the embodiments of the present application, the drawings needed to be used in the description of the embodiments are briefly introduced below, and it is obvious that the drawings in the following description are only some embodiments of the present application, and it is obvious for those skilled in the art to obtain other drawings based on these drawings without creative efforts.
Fig. 1 is a schematic flowchart of a cell handover control method of a network side device according to an embodiment of the present application;
fig. 2 is a flowchart illustrating a cell handover method at a terminal side according to an embodiment of the present application;
fig. 3 is a schematic structural diagram of a cell switching control apparatus of a network side device according to an embodiment of the present application;
fig. 4 is a schematic structural diagram of a cell handover apparatus at a terminal side according to an embodiment of the present application;
fig. 5 is a schematic structural diagram of another cell handover control apparatus of a network side device according to an embodiment of the present application;
fig. 6 is a schematic structural diagram of another cell handover apparatus at a terminal side according to an embodiment of the present application.
Detailed Description
The technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the drawings in the embodiments of the present application, and it is obvious that the described embodiments are only a part of the embodiments of the present application, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present application.
In the embodiment of the present application, a scenario in which a CHO coexists with a dual-RAT-connectivity (MRDC) is introduced into R17 or R18, that is, a conditional PCell handover scenario with PSCell addition or change, that is, a scenario in which PSCell addition or change is performed during a conditional PCell handover is proposed. The scenario can realize establishment of MRDC while PCell switching is carried out, reduces time delay of establishment of MRDC, is beneficial to improvement of network throughput, or completes mobility management of PSCell while PCell connection is maintained.
However, how the network configures the configuration of conditional PCell handover with PSCell addition or change, and how the UE implements the handover of PCell based on the configuration of conditional PCell handover with PSCell addition or change, and/or the change or addition of PSCell, is a current issue that needs to be considered. Therefore, the present invention provides a method and an apparatus for configuring a conditional PCell handover with PSCell addition or change to solve the above problems.
The method and the device are based on the same application concept, and because the principles of solving the problems of the method and the device are similar, the implementation of the device and the method can be mutually referred, and repeated parts are not repeated.
The technical scheme provided by the embodiment of the application can be suitable for various systems, particularly 5G systems. For example, the applicable system may be a global system for mobile communication (GSM) system, a Code Division Multiple Access (CDMA) system, a Wideband Code Division Multiple Access (WCDMA) General Packet Radio Service (GPRS) system, a Long Term Evolution (LTE) system, an LTE Frequency Division Duplex (FDD) system, an LTE Time Division Duplex (TDD), a Universal Mobile Telecommunications System (UMTS), a Worldwide Interoperability for Microwave Access (WiMAX) system, a 5G NR system, and the like. These various systems include terminal devices and network devices.
The terminal device referred to in the embodiments of the present application may refer to a device providing voice and/or data connectivity to a user, a handheld device having a wireless connection function, or other processing device connected to a wireless modem. The names of the terminal devices may also be different in different systems, for example, in a 5G system, the terminal devices may be referred to as User Equipments (UEs). Wireless terminal devices, which may be mobile terminal devices such as mobile telephones (or "cellular" telephones) and computers having mobile terminal devices, e.g., mobile devices that may be portable, pocket, hand-held, computer-included, or vehicle-mounted, communicate voice and/or data with a radio access network via the RAN. Examples of such devices include Personal Communication Service (PCS) phones, cordless phones, session Initiated Protocol (SIP) phones, wireless Local Loop (WLL) stations, personal Digital Assistants (PDAs), and the like. The wireless terminal device may also be referred to as a system, a subscriber unit (subscriber unit), a subscriber station (subscriber station), a mobile station (mobile), a remote station (remote station), an access point (access point), a remote terminal device (remote terminal), an access terminal device (access terminal), a user terminal device (user terminal), a user agent (user agent), and a user device (user device), which are not limited in this embodiment of the present application.
The network device according to the embodiment of the present application may be a base station, and the base station may include a plurality of cells. A base station may also be referred to as an access point, or a device in an access network that communicates over the air-interface, through one or more sectors, with wireless terminal devices, or by other names, depending on the particular application. The network device may be configured to interconvert received air frames and Internet Protocol (IP) packets as a router between the wireless terminal device and the rest of the access network, which may include an Internet Protocol (IP) communication network. The network device may also coordinate attribute management for the air interface. For example, the network device according to the embodiment of the present application may be a Base Transceiver Station (BTS) in a global system for mobile communications (GSM) or a Code Division Multiple Access (CDMA), may also be a network device (NodeB) in a Wideband Code Division Multiple Access (WCDMA), may also be an evolved network device (eNB or e-NodeB) in a long term evolution (long term evolution, LTE) system, a 5G base station in a 5G network architecture (next generation system), or may also be a home evolved node B (HeNB), a relay node (HeNB), a home base station (femto), a pico base station (pico), and the like, which are not limited in the embodiment of the present application.
Various embodiments of the present application will be described in detail below with reference to the accompanying drawings. It should be noted that the display sequence in the embodiments of the present application only represents the sequence of the embodiments, and does not represent the advantages and disadvantages of the technical solutions provided by the embodiments.
The embodiment of the application provides a conditional PCell switching scene with PSCell addition or change, and aiming at the scene, network side equipment can only configure execution conditions for candidate PCell cells; or the network side equipment only configures execution conditions for the candidate PSCell cells; or, the network side device configures independent execution conditions for each candidate PCell cell and the corresponding pscels candidate cell.
After the UE receives the configuration of conditional PCell handover with PSCell addition or change issued by the network side device, the UE may perform measurement and evaluation only on candidate PCell cells according to the execution conditions therein, or perform measurement and evaluation only on candidate PSCell cells, or simultaneously perform measurement and evaluation on candidate PCell cells and their associated candidate PSCell cells, and when the execution conditions are met, initiate access to the target PCell and/or the target PSCell.
The method comprises the following specific steps:
it should be noted that, in the embodiment of the present application, the execution condition for conditional reallocation of a PCell is, that is, the execution condition for conditional reallocation with a measurement target being the PCell is the same;
the execution condition for the conditional reallocation of the PSCell, that is, the execution condition equivalent to the conditional reallocation of which the measurement target is the PSCell.
A network side device:
1. in the embodiment of the present application, the configuration information related to the execution condition preset by the network side device includes at least one execution condition for conditional reallocation. That is, the network side device may configure the execution condition for conditional reallocation only for the candidate PCell cells, or the network side device configures the execution condition for conditional reallocation only for the candidate PSCell cells, or the network side device simultaneously configures the execution condition for independent conditional reallocation for each candidate PCell cell and its corresponding PSCell candidate cell.
Optionally, the execution condition of the conditional reconfiguration includes at least one of the following:
measurement execution conditions such as the above-described A3 execution condition, A5 execution condition;
an indication of a reference measurement configuration;
measuring indication information that the target cell is a PCell or a PSCell;
and measuring the identification (Cell group ID) of the Cell group where the target Cell is positioned.
Optionally, the execution condition of the conditional reallocation may be associated with a measurement target being a candidate PCell cell of the PCell, or the execution condition of the conditional reallocation may be associated with a measurement target being a candidate PSCell cell of the PSCell. The execution condition of the conditional reconfiguration with the measurement target of PCell is generated by the source MN side, and the execution condition of the conditional reconfiguration with the measurement target of PSCell is generated by the source MN side or the source SN.
2. The network side device generates a Radio Resource Control (RRC) reconfiguration message including one or more pieces of conditional reconfiguration configuration information, and sends the RRC reconfiguration message to the UE.
Optionally, the conditional reconfiguration information includes at least one of the following:
configuration information of PCell handover, configuration information added or changed by a PSCell, and configuration information related to execution conditions; at this time, the configuration information related to the execution condition may include an execution condition for conditional reallocation in which one measurement target is PCell, and/or an execution condition for conditional reallocation in which one measurement target is PSCell;
configuration information for PCell handover, configuration information added or changed by at least one PSCell, and configuration information related to execution conditions corresponding to each PSCell (pscells may be the same cell group or different cell groups); at this time, the configuration information related to the execution condition may include an execution condition for conditional reallocation in which one measurement target is PCell, and/or an execution condition for conditional reallocation in which at least one measurement target is PSCell. Specifically, according to the difference between the configuration information of the PCell and the PSCell included in the configuration information of the conditional reallocation and the execution condition of the conditional reallocation included in the configuration information related to the execution condition, the configuration information of the conditional reallocation set by the network side device may be:
in case one, the configuration information of conditional reallocation includes: configuration information of PCell handover, configuration information added or changed by a PSCell, and execution conditions of conditional reconfiguration for the PCell;
in case two, the configuration information of the conditional reconfiguration includes: configuration information of PCell handover and configuration information of addition or change of a PSCell, and an execution condition for conditional reconfiguration of the PSCell;
and in case three, the configuration information of the conditional reconfiguration comprises: configuration information of PCell handover and configuration information of addition or change of one PSCell, and execution conditions for conditional reallocation of PCell and execution conditions for conditional reallocation of PSCell;
and in case four, the configuration information of the condition reconfiguration comprises: configuration information of PCell handover and configuration information of at least one PSCell addition or change, and an execution condition for conditional reconfiguration of PCell;
and in case five, the configuration information of the condition reconfiguration comprises: configuration information of PCell handover and configuration information of at least one PSCell addition or change, and an execution condition of a conditional reconfiguration for each PSCell;
and in the sixth situation, the configuration information of the conditional reconfiguration comprises the following information: configuration information of PCell handover and configuration information of at least one PSCell addition or change, and an execution condition of conditional reallocation of PCell and an execution condition of conditional reallocation for each PSCell.
The UE side:
the UE receives an RRC reconfiguration message with one or more pieces of conditional reconfiguration configuration information and acquires configuration information related to execution conditions in the conditional reconfiguration configuration information.
Further, the UE determines the information of the execution condition of the conditional reallocation in the configuration information related to the execution condition, and determines that the measurement evaluation target of the execution condition of the conditional reallocation is PCell and/or PSCell according to at least one of the following manners:
indication information according to the measurement execution condition and the reference measurement configuration; or the like, or a combination thereof,
according to the indication information that the measurement target cell is a PCell or a PSCell; or the like, or, alternatively,
according to the Cell group ID of the Cell group where the measurement target Cell is located.
Further, the UE performs measurement evaluation on the candidate PCell cell based on the configuration information related to the execution condition of the PCell of the measurement target cell; and/or the UE carries out measurement evaluation on the candidate PSCell cells based on the configuration information related to the execution condition of the PSCell as the measurement target cell.
Further, case one: if the configuration information related to the execution condition only comprises the execution condition information of the conditional reallocation with the measurement target being the PCell, or simultaneously comprises the execution condition information of the conditional reallocation with the measurement targets being the PSCell and the PCell; and when the UE measurement evaluation finds that the execution condition of a certain candidate PCell is satisfied, the UE executes any one of the following:
the UE initiates access aiming at the PCell meeting the execution condition, and reports a first feedback message after the access is successful, or triggers SCG failure information to report to a network;
and the UE initiates access to the PCell meeting the execution condition and the PSCell corresponding to the PCell meeting the execution condition.
Further, case two: if the configuration information related to the execution condition only includes the execution condition information of the conditional reallocation of which the measurement target is the PSCell, or simultaneously includes the execution condition information of the conditional reallocation of which the measurement targets are the PSCell and the PCell; and when the UE measures and evaluates that the execution condition of a certain candidate PSCell is satisfied, the UE executes any one of the following:
the UE initiates access to the PSCell meeting the execution condition, and reports a second feedback message after the access is successful, or triggers MCG failure information to report to the network;
and the UE initiates access to the PSCell meeting the execution condition and the PCell corresponding to the PSCell meeting the execution condition.
Further, case three: if the configuration information related to the execution condition simultaneously contains execution condition information with measurement targets of PSCells and condition reconfiguration of PCell, and when the terminal measures and evaluates that a certain candidate PCell and the execution condition of a certain candidate PSCell corresponding to the candidate PCell are simultaneously satisfied, the terminal starts to access the PCell satisfying the execution condition and the PSCell corresponding to the PCell satisfying the execution condition;
further, case four: if the configuration information related to the execution condition simultaneously contains the execution conditions of the condition reconfiguration of the measurement targets of the PCell and the PScell, when the terminal evaluates that the execution conditions of the candidate PCell are satisfied but the execution conditions of the candidate PScell corresponding to the candidate PCell are not satisfied; or when the terminal evaluates that the execution condition of the candidate PSCell is satisfied but the execution condition of the candidate PCell corresponding to the candidate PSCell is not satisfied, the terminal continues to measure and evaluate the execution condition based on condition reconfiguration, the candidate PCell cell and the candidate PSCell cell.
That is to say, in the embodiment of the present application, a precondition for the UE to initiate an operation of accessing the PCell and the corresponding PSCell may be that both execution conditions of the PCell and the corresponding PSCell are satisfied; the execution condition of the PCell or the execution condition of the PSCell corresponding to the PCell may be satisfied. Or, the UE side can initiate access only when the execution conditions of the PCell and the corresponding PSCell are both satisfied.
Optionally, for the case that the UE initiates PCell and PSCell access simultaneously:
if the PCell access fails and the PSCell access succeeds, the UE performs one or more of the following operations:
triggering MCG failure to report to the network;
triggering an RRC reestablishment process;
and reporting the second feedback message to the network.
If the PSCell fails to access and the PCell succeeds to access, the UE executes one or more of the following operations:
triggering SCG failure to report to the network;
triggering an RRC reestablishment process;
and reporting the first feedback message to the network.
Optionally, the first feedback message includes at least one of the following:
indication information that addition or change of the PSCell corresponding to the PCell is not performed;
indication information of a PSCell that failed to execute;
indication information for performing only handover of the PCell;
and identifying information of PSCells which fail to execute and/or cell group identifying information.
Optionally, the second feedback message includes at least one of the following:
indication information that the switching of the PCell corresponding to the PSCell is not executed;
indication information of a PCell for which execution failed;
only the indication information of the change or addition of the PSCell is performed.
Specific descriptions of some examples are given below:
example 1: the target MN generates a procedure that contains configuration information for the PCell and the corresponding PSCell.
Step 1: and the target MN side acquires the candidate PSCell cell determined by the target SN side and the generated PSCell addition or change configuration information aiming at the candidate PSCell cell.
Step 2: the target MN side selects candidate PCell cells from PCell cells recommended by the source MN side.
Step 2-1: aiming at the condition that the switching configuration information of the PCell comprises configuration information added or changed by one PScell:
for each candidate PCell cell, the target MN side generates PCell handover configuration information for the PCell handover configuration information which only comprises configuration information of one candidate PSCell cell.
Step 2-2: aiming at the condition that the switching configuration information of the PCell comprises configuration information added or changed by a plurality of PScells:
for each candidate PCell cell, the target MN side generates PCell handover configuration information for it, including configuration information of all candidate PSCell cells received from the target SN side. The pscells may be the same cell group or different.
Example 2: and only configuring execution condition information of conditional reconfiguration with a measurement target of PCell.
Step 1: for different scenes, the relevant operation of step 1 includes:
scene 1: SN Change triggered by Source SN:
step 1-1: and the source SN side sends a conditional SCG change request message to the source MN side, and carries the recommended candidate PSCell cells in the conditional SCG change request message.
Step 1-2: and the source MN side receives the conditional SCG change request information triggered by the SN, judges that the PCell also initiates a conditional switching process at the same time, and determines corresponding candidate PCell cells. And the source MN side sends a conditional switching request message to the candidate target MN side, wherein the conditional switching request message carries the candidate PCell cell recommended by the source MN side and the candidate PSCell cell related information recommended by the source SN side.
Step 1-3: based on the "target MN generates configuration information including a PCell and a corresponding PSCell" in embodiment 1, the target MN sends the generated configuration information including the PCell and the corresponding PSCell to the source MN.
Scene 2: the source MN side initiates a conditional PCell switch with conditional PSCell addition or change:
step 1-1: the source MN side determines candidate PCell cells and candidate PSCell cells, and the process can comprise a condition SN change/addition triggered by the source MN and a condition switching process initiated by the source MN. And the source MN sends a conditional switching request message to the candidate target MN, wherein the conditional switching request message carries the candidate PCell cell recommended by the source MN and the relevant information of the candidate PSCell cell.
Step 1-2: based on the "target MN generates configuration information including a PCell and a corresponding PSCell" described in embodiment 1, the target MN sends the generated configuration information including the PCell and the corresponding PSCell to the source MN.
Scene 3: and (2) conditional PCell switching initiated by a source MN side, and determining to initiate PSCell addition and/or change at the same time by a target MN:
step 1-1: and the source MN side determines a candidate PCell cell. And the source MN sends a conditional handover request message to the candidate target MN, wherein the conditional handover request message carries the candidate PCell recommended by the source MN. The target MN determines the PCell cell and at the same time determines to trigger the PSCell addition or change procedure.
Step 1-2: based on the "target MN generates configuration information including a PCell and a corresponding PSCell" in embodiment 1, the target MN sends the generated configuration information including the PCell and the corresponding PSCell to the source MN.
Step 2: the source MN generates execution condition related configuration information for the candidate PCell selected by the target MN, and associates the execution condition related configuration information with the configuration information which is sent by the corresponding target MN and contains the PCell and the corresponding PSCell to generate an RRC reconfiguration message and sends the RRC reconfiguration message to the UE. Wherein the configuration information related to the execution condition includes execution condition information of conditional reallocation in which a measurement evaluation target is PCell, and the execution information of conditional reallocation includes at least one of:
measuring an execution condition;
referring to indication information of measurement configuration of a source MN side;
measuring indication information that a target cell is a PCell;
and measuring the Cell group ID of the Cell group in which the target Cell is positioned.
And step 3: and after receiving the RRC reconfiguration message, the UE performs measurement evaluation on the candidate PCell according to the execution condition.
And 4, step 4: and after the measurement evaluation of at least one candidate PCell meets the execution condition configured by the network side equipment, the UE initiates access to the candidate PCell and the PSCell corresponding to the candidate PCell.
Step 4-1: the UE is successfully accessed to the target PCell and the corresponding target PSCell;
step 4-2: if the UE successfully accesses the target PCell but does not successfully access the target PSCell, the UE executes:
the UE triggers SCG failure report, or;
and the UE reports the first feedback message.
Wherein the first feedback message comprises at least one of:
indication information of a PSCell that failed to execute;
indication information for performing only handover of the PCell;
and identifying information of the PSCell which fails to execute and/or cell group identifying information.
Step 4-3: if the UE successfully accesses the target PSCell but does not successfully access the target PCell, the UE executes the following steps:
if signaling radio bearer 3 (signaling radio bearer 3, srb 3) and/or Split signaling radio bearer 1 (Split signaling radio bearer 1, split SRB1) are configured, MCG failure reporting is triggered, or;
if the SRB3 and/or the split SRB1 are configured, the UE reports the second feedback message through the RRC message, or:
and if the SRB3 and the split SRB1 are not configured, the UE reports the second feedback message through the MAC CE.
Wherein the second feedback message comprises at least one of:
indication information of a PCell for which execution failed;
and only instruction information for switching the PSCell is executed.
Example 3: only execution condition information of conditional reallocation of which the measurement target is the PSCell is configured.
Step 1: for different scenes, the relevant operation of step 1 includes:
scene 1: SN Change triggered by Source SN:
step 1-1: the source SN side sends a request message for changing the condition SCG to the source MN side, and carries the recommended candidate PSCell cells and the execution conditions of the corresponding candidate PSCells and/or the configuration information related to the execution conditions of the corresponding candidate PSCells.
Step 1-2: and the source MN side receives the conditional SCG change request information triggered by the SN, judges that the PCell also initiates a conditional switching process at the same time, and determines corresponding candidate PCell cells. And the source MN side sends a conditional switching request message to the candidate target MN side, wherein the conditional switching request message carries the candidate PCell cell recommended by the source MN side and the candidate PSCell cell related information recommended by the source SN side.
Step 1-3: based on the "target MN generates configuration information including a PCell and a corresponding PSCell" described in embodiment 1, the target MN sends the generated configuration information including the PCell and the corresponding PSCell to the source MN.
Step 1-4: if the source SN gives the source MN the execution condition of the corresponding candidate PSCell in step 1-1, the source MN side generates configuration information related to the execution condition for the corresponding candidate PSCell according to the execution condition of the candidate PSCell.
Scene 2: the source MN side initiates a conditional PCell switch with conditional PSCell addition or change:
step 1-1: the process for determining the candidate PCell cell and the candidate PSCell cell at the source MN side can comprise a conditional SN change/addition triggered by the source MN and a conditional switching process initiated by the source MN. And the source MN side sends a conditional handover request message to the candidate target MN side, wherein the conditional handover request message carries the candidate PCell cell recommended by the source MN side and the relevant information of the candidate PSCell cell.
Step 1-2: based on the "target MN generates configuration information including a PCell and a corresponding PSCell" described in embodiment 1, the target MN sends the generated configuration information including the PCell and the corresponding PSCell to the source MN.
Step 1-3: the source MN generates execution condition-related configuration information for the corresponding candidate PSCell.
Scene 3: the method comprises the following steps that a source MN side initiates conditional PCell switching, and a target MN determines to initiate PScell addition and/or change at the same time:
step 1-1: and the source MN side determines a candidate PCell cell. And the source MN sends a conditional switching request message to the candidate target MN, wherein the conditional switching request message carries the candidate PCell recommended by the source MN. The target MN determines the PCell cell and at the same time determines to trigger the PSCell addition or change procedure.
Step 1-2: based on the embodiment 1, "the target MN generates configuration information including a PCell and a corresponding PSCell," and the target MN sends the generated configuration information including the PCell and the corresponding PSCell to the source MN.
Step 1-3: and the source MN generates execution condition related configuration information for the corresponding candidate PSCell.
And 2, step: and the source MN associates the execution condition related configuration information aiming at the candidate PSCells with the configuration information which is sent by the corresponding target MN and contains the PCell and the corresponding PSCells, generates an RRC reconfiguration message and sends the RRC reconfiguration message to the UE.
Aiming at the condition that the switching configuration information of the PCell comprises configuration information added or changed by one PScell:
the configuration information related to the execution condition includes: one measurement evaluation target is the execution condition of the conditional reconfiguration of the PSCell.
Aiming at the condition that the switching configuration information of the PCell comprises configuration information added or changed by a plurality of PSCells:
the configuration information related to the execution condition includes: one measurement evaluation target is an execution condition list of conditional reallocation of the PSCell. And each execution condition in the execution condition list aiming at the condition reconfiguration of the PSCells sequentially corresponds to the execution condition of the condition reconfiguration of each PSCell corresponding to the PCell.
The execution information of the conditional reconfiguration of the PSCell, which is the measurement evaluation target, includes at least one of:
measuring an execution condition;
an indication of a reference measurement configuration;
measuring indication information that the target cell is the PSCell;
and measuring the Cell group ID of the Cell group in which the target Cell is positioned.
For the SN change triggered by the scene 1-source SN, the indication information of the reference measurement configuration is the indication information of the measurement configuration at the reference source SN side;
aiming at condition PCell switching with condition PSCell addition or change initiated by a scene 2-source MN side and condition PCell switching initiated by a scene 3-source MN side, a target MN determines to initiate PSCell addition and/or change at the same time, and the reference indication information of the measurement configuration is the reference indication information of the measurement configuration of the source MN side.
And step 3: and after receiving the RRC reconfiguration message, the UE performs measurement evaluation on the candidate PSCells according to the execution conditions.
And 4, step 4: and after the measurement evaluation of at least one candidate PSCell meets the execution condition configured by the network side equipment, the UE initiates access to the candidate PSCell and the PCell corresponding to the candidate PSCell.
Step 4-1: the UE is successfully accessed to the target PSCell and the corresponding target PCell;
step 4-2: if the UE successfully accesses the target PCell but does not successfully access the target PSCell, the UE executes:
the UE triggers SCG failure reporting, or;
and the UE reports the first feedback message.
Wherein the first feedback message includes at least one of:
indication information of a PSCell that failed to execute;
indication information for performing only handover of the PCell;
and identifying information of PSCells which fail to execute and/or cell group identifying information.
Step 4-3: if the UE successfully accesses the target PSCell but does not successfully access the target PCell, the UE executes:
if the SRB3 and/or the split SRB1 are/is configured, triggering MCG failure reporting, or;
if the SRB3 and/or the split SRB1 are configured, the UE reports the second feedback message through an RRC message, or:
and if the SRB3 and the split SRB1 are not configured, the UE reports the second feedback message through the MAC CE.
Wherein the second feedback message includes at least one of:
indication information of a PCell for which execution failed;
and only instruction information for switching the PSCell is executed.
Example 4: and simultaneously configuring the execution condition of the PCell and the execution condition of the PSCell as measurement targets.
Example 4-1: the UE determines a target cell associated with an execution condition of the conditional reconfiguration and a measurement configuration of an execution condition reference.
Step 1: and the UE receives the RRC reconfiguration message with the conditional reconfiguration related configuration information and acquires the configuration information related to the execution condition in the conditional reconfiguration related configuration information.
Step 2: and the UE determines the execution condition of the condition reconfiguration and the associated target cell.
The determination is performed by displaying signaling, that is, the determination is performed by indicating information that the measurement target cell is a PCell or a PSCell, and/or a cell group ID of the measurement target cell.
And determining that the measurement target is PCell or PSCell through the measurement execution condition in the execution condition of the condition reconfiguration and the reference measurement reconfiguration.
When the configuration information related to the execution condition contains two execution conditions for conditional reallocation at the same time, the execution condition for the first conditional reallocation is the execution condition information related to the PCell and the execution condition for the second conditional reallocation is the execution condition information related to the PSCell according to the protocol.
And 3, step 3: the UE determines a measurement configuration to perform conditional referencing.
Determining the reference measurement configuration as the measurement configuration of the MN configuration or the measurement configuration of the SN configuration, or,
the reference measurement configuration or the SN configuration is determined by the coding format of the measurement execution condition, that is, the MN node code, that is, the measurement configuration of the reference MN configuration, and the SN node code, that is, the measurement configuration of the reference SN configuration.
Example 4-2: the switching configuration information for the PCell includes configuration information added or changed by one PSCell.
Step 1: for different scenes, the related operations of step 1 include:
scene 1: SN change process triggered by source SN;
step 1-1: the source SN side sends a request message for changing the condition SCG to the source MN side, and carries the recommended candidate PSCell cells and the execution conditions of the corresponding candidate PSCells and/or the configuration information related to the execution conditions of the corresponding candidate PSCells.
Step 1-2: and the source MN side receives the conditional SCG change request information triggered by the SN, judges that the PCell also initiates a conditional switching process at the same time, and determines corresponding candidate PCell cells. And the source MN side sends a conditional switching request message to the candidate target MN side, wherein the conditional switching request message carries the candidate PCell cell recommended by the source MN side and the candidate PSCell cell related information recommended by the source SN side.
Step 1-3: based on the embodiment 1, "the target MN generates configuration information including a PCell and a corresponding PSCell," and the target MN sends the generated configuration information including the PCell and the corresponding PSCell to the source MN.
Step 1-4: if the source SN gives the source MN the execution condition of the corresponding candidate PSCell in step 1-1, the source MN side generates an execution condition for the corresponding candidate PSCell according to the execution condition of the candidate PSCell.
Scene 2: the source MN side initiates a conditional PCell switch with conditional PSCell addition or change:
step 1-1: the process of determining candidate PCell cells and candidate PSCell cells at the source MN side can comprise a conditional SN change/addition triggered by the source MN and a conditional switching process initiated by the source MN. And the source MN side sends a conditional handover request message to the candidate target MN side, wherein the conditional handover request message carries the candidate PCell cell recommended by the source MN side and the relevant information of the candidate PSCell cell.
Step 1-2: based on the "target MN generates configuration information including a PCell and a corresponding PSCell" described in embodiment 1, the target MN sends the generated configuration information including the PCell and the corresponding PSCell to the source MN.
Step 1-3: the source MN generates an execution condition for the corresponding candidate PSCell.
Scene 3: the method comprises the following steps that a source MN side initiates conditional PCell switching, and a target MN determines to initiate PScell addition and/or change at the same time:
step 1-1: and the source MN side determines a candidate PCell cell. And the source MN sends a conditional switching request message to the candidate target MN, wherein the conditional switching request message carries the candidate PCell recommended by the source MN. The target MN determines the PCell cell and at the same time determines to trigger the PSCell addition or change procedure.
Step 1-2: based on the embodiment 1, "the target MN generates configuration information including a PCell and a corresponding PSCell," and the target MN sends the generated configuration information including the PCell and the corresponding PSCell to the source MN.
Step 1-3: and the source MN generates an execution condition for the corresponding candidate PSCell.
Step 2: and the source MN generates an execution condition for the PCell selected by the target MN, and associates the relevant configuration information of the execution condition with the configuration information which is sent by the corresponding target MN and contains the PCell and the corresponding PSCell to generate an RRC reconfiguration message and sends the RRC reconfiguration message to the UE. Wherein the configuration information related to the execution condition includes:
an execution condition for conditional reconfiguration for the PCell;
execution conditions for conditional reconfiguration of the PSCell.
The execution condition of the conditional reallocation comprises at least one of the following items:
measuring an execution condition;
an indication of a reference measurement configuration;
measuring indication information of a target cell which is a PCell or a PSCell;
and measuring the Cell group ID of the Cell group in which the target Cell is positioned.
The execution condition correlation measurement target aiming at the condition reconfiguration of the PCell is a candidate PCell cell of the PCell, and the execution condition correlation measurement target aiming at the condition reconfiguration of the PSCell is a candidate PSCell cell of the PSCell.
The measurement execution condition among the execution conditions for conditional reconfiguration of PCell is generated by the PCell selected by the source MN for the target MN. The condition reconfiguration for the PCell may further include the measurement configuration information configured for the source MN, where the measurement configuration information is indicated by the indication information of the reference measurement configuration.
The measurement execution condition in the execution condition for conditional reallocation among the execution conditions for conditional reallocation of pscells is the source MN, and/or the source SN is generated for pscells, as in embodiment 3. The execution condition for conditional reconfiguration of the PSCell may further include measurement configuration information configured for the source MN or the source SN, where the indication information of the reference measurement configuration indicates the measurement reference of the UE.
Besides the above signaling indication information to inform the UE of the measurement configuration referred to, the UE may also be informed in an implicit manner, for example, by a coding manner of the measurement execution condition.
The network may explicitly indicate, through the indication information that the measurement target cell is the PCell or the PSCell, that the execution condition 1 of the UE conditional reallocation is the execution condition information associated with the PCell, or may explicitly specify, in an implicit manner, that, for example, when the configuration information related to the execution condition includes two execution conditions for the conditional reallocation at the same time, the execution condition for the first conditional reallocation is the execution condition information associated with the PCell, and the execution condition for the second conditional reallocation is the execution condition information associated with the PSCell. The measurement target may also be determined to be the PCell or the PSCell by a measurement execution condition among the execution conditions of the conditional reallocation and a reference measurement reallocation.
And step 3: after receiving the RRC reconfiguration message, the UE determines, based on embodiment 4-1, a target cell associated with an execution condition of the conditional reconfiguration and a measurement configuration referenced by the execution condition, and performs measurement and evaluation on the candidate PCell and the corresponding PSCell according to the configuration information related to the execution condition.
Step 4a: if the UE measures and evaluates that the execution condition of a certain candidate PCell is satisfied, executing embodiment 4-4;
if the UE measures and evaluates that the execution condition of a certain candidate PSCell is satisfied, executing the embodiments 4-5;
if the UE measures and evaluates that the execution condition of a certain candidate PCell is satisfied, and the execution condition of the PSCell corresponding to the candidate PCell is also satisfied, performing embodiments 4-6;
and 4b: only when the measurement evaluation finds that the execution condition of a certain candidate PCell is satisfied, and the execution condition that the candidate PCell has a corresponding PSCell is also satisfied, the UE performs corresponding processing, and the specific processing procedure is as in embodiments 4 to 6.
Examples 4 to 3: the switching configuration information for the PCell includes configuration information added or changed by a plurality of pscells.
Step 1: for different scenes, the relevant operation of step 1 includes:
scene 1: source SN triggered SN Change procedure
Step 1-1: the source SN side sends a request message for changing the condition SCG to the source MN side, and carries the recommended candidate PSCell cells and the execution conditions of the corresponding candidate PSCells and/or the configuration information related to the execution conditions of the corresponding candidate PSCells.
Step 1-2: and the source MN side receives the conditional SCG change request information triggered by the SN, judges that the PCell also initiates a conditional switching process at the same time, and determines corresponding candidate PCell cells. And the source MN side sends a conditional handover request message to the candidate target MN side, wherein the conditional handover request message carries the candidate PCell cell recommended by the source MN side and the relevant information of the candidate PSCell cell recommended by the source SN side.
Step 1-3: based on the "target MN generates configuration information including a PCell and a corresponding PSCell" described in embodiment 1, the target MN sends the generated configuration information including the PCell and the corresponding PSCell to the source MN.
Step 1-4: if the source SN gives the source MN the execution condition of the corresponding candidate PSCell in step 1-1, the source MN side generates the execution condition for the corresponding candidate PSCell according to the execution condition of the candidate PSCell.
Scene 2: the source MN side initiates a conditional PCell switch with conditional PSCell addition or change:
step 1-1: the process for determining the candidate PCell cell and the candidate PSCell cell at the source MN side may include a conditional SN change/addition triggered by the source MN and a conditional handover process initiated by the source MN. And the source MN sends a conditional switching request message to the candidate target MN, wherein the conditional switching request message carries the candidate PCell cell recommended by the source MN and the relevant information of the candidate PSCell cell.
Step 1-2: based on the "target MN generates configuration information including a PCell and a corresponding PSCell" described in embodiment 1, the target MN sends the generated configuration information including the PCell and the corresponding PSCell to the source MN.
Step 1-3: and the source MN generates an execution condition for the corresponding candidate PSCell.
Scene 3: and (2) conditional PCell switching initiated by a source MN side, and determining to initiate PSCell addition and/or change at the same time by a target MN:
step 1-1: and the source MN side determines a candidate PCell cell. And the source MN sends a conditional switching request message to the candidate target MN, wherein the conditional switching request message carries the candidate PCell recommended by the source MN. The target MN determines the PCell cell and at the same time determines to trigger the PSCell addition or change procedure.
Step 1-2: based on the "target MN generates configuration information including a PCell and a corresponding PSCell" in embodiment 1, the target MN sends the generated configuration information including the PCell and the corresponding PSCell to the source MN.
Step 1-3: the source MN generates an execution condition for the corresponding candidate PSCell.
Step 2: and the source MN generates an execution condition for the PCell selected by the target MN, and associates the relevant configuration information of the execution condition with the configuration information which is sent by the corresponding target MN and contains the PCell and the corresponding PSCell to generate an RRC reconfiguration message and sends the RRC reconfiguration message to the UE. Wherein the configuration information related to the execution condition includes:
an execution condition for conditional reconfiguration for the PCell;
list of execution conditions for conditional reallocation of PSCell.
Each execution condition in the execution condition list for the condition reallocation of the PSCell sequentially corresponds to the execution condition for the condition reallocation of each PSCell corresponding to the PCell.
The execution condition of the conditional reassortment includes at least one of:
measuring an execution condition;
an indication of a reference measurement configuration;
measuring indication information that the target cell is a PCell or a PSCell;
and measuring the Cell group ID of the Cell group in which the target Cell is positioned.
The execution condition correlation measurement target aiming at the condition reconfiguration of the PCell is a candidate PCell cell of the PCell, and the execution condition correlation measurement target aiming at the condition reconfiguration of the PSCell is a candidate PSCell cell of the PSCell.
The measurement execution condition among the execution conditions for conditional reconfiguration of PCell is generated by the PCell selected by the source MN for the target MN. The condition for performing conditional reconfiguration for PCell may further include measurement configuration information configured for the source MN, where the measurement configuration information is indicated by the indication information of the reference measurement configuration and referred to by the UE.
The measurement execution condition in the execution condition for conditional reallocation among the execution conditions for conditional reallocation of pscells is the source MN, and/or the source SN is generated for pscells, as in embodiment 3. The execution condition for conditional reconfiguration of the PSCell may further include measurement configuration information configured for the source MN or the source SN, where the indication information of the reference measurement configuration indicates the measurement reference of the UE.
Besides the above signaling indication information to inform the UE of the measurement configuration referred to, the UE may also be informed in an implicit manner, for example, in a coding manner of the measurement execution condition.
The network may explicitly indicate, through the indication information that the measurement target cell is the PCell or the PSCell, that the execution condition 1 of the UE condition reallocation is the execution condition information associated with the PCell, or may determine, through the measurement execution condition in the execution condition of the condition reallocation and the reference measurement reallocation, that the measurement target is the PCell or the PSCell.
And 3, step 3: after receiving the RRC reconfiguration message, the UE determines, based on embodiment 4-1, a target cell associated with an execution condition of the conditional reconfiguration and a measurement configuration referenced by the execution condition, and performs measurement and evaluation on the candidate PCell and the corresponding PSCell according to the configuration information related to the execution condition.
Step 4a: if the UE measures and evaluates that the execution condition of a certain candidate PCell is met, executing the embodiment 4-4;
if the UE measures and evaluates that the execution condition of a certain candidate PSCell is satisfied, executing the embodiments 4-5;
if the UE measures and evaluates that the execution condition of a candidate PCell is satisfied, and the execution condition of the PSCell corresponding to the candidate PCell is also satisfied, performing embodiments 4-6;
and 4b: only when the measurement and evaluation find that the execution condition of a certain candidate PCell is satisfied and the execution condition of the PSCell corresponding to the candidate PCell is also satisfied, the UE performs corresponding processing, and the specific processing procedure is as in embodiments 4 to 6.
Examples 4 to 4: and when the UE evaluates and finds that the execution condition of a certain candidate PCell is met, the UE side processes.
Step 1: the UE measurement evaluation finds that the execution condition of a certain candidate PCell is satisfied.
Step 2-1: optionally, the UE initiates access to the PCell.
Optionally, after the UE successfully accesses, reporting a first feedback message, where the first feedback message includes at least one of the following:
indication information that addition or change of a PSCell corresponding to the PCell is not performed;
performing only indication information of handover of the PCell.
Optionally, the UE initiates access to the PCell, and triggers SCG failure information to be reported to the network after the access is successful;
step 2-3: optionally, the UE initiates access to the PCell and the PSCell corresponding to the PCell.
Step 2-3a: optionally, the UE successfully accesses the target PCell and the corresponding target PSCell;
step 2-3b: optionally, if the UE successfully accesses the target PCell but does not successfully access the target PSCell, then:
the UE triggers SCG failure reporting, or;
and the UE reports the first feedback message.
Wherein the first feedback message includes at least one of:
indication information of a PSCell that failed to execute;
performing only indication information of handover of the PCell.
Step 2-3c: optionally, if the UE successfully accesses the target PSCell but does not successfully access the target PCell, then:
if the SRB3 and/or the split SRB1 are/is configured, triggering MCG failure reporting, or;
if SRB3 and/or split SRB1 are configured, the UE reports a second feedback message through an RRC message, or:
and if the SRB3 and the split SRB1 are not configured, the UE reports the second feedback message through the MAC CE.
Wherein the second feedback message includes at least one of:
indication information of a PCell for which execution failed;
and only instruction information for switching the PSCell is executed.
Examples 4 to 5: and when the UE evaluates and finds that the execution condition of a certain candidate PSCell is satisfied, processing at the UE side.
Step 1: the UE measurement evaluation finds that the execution condition of a certain candidate PSCell is satisfied.
Step 2-1: optionally, the UE initiates access to the PSCell.
Optionally, if SRB3 is configured, the UE reports the second feedback message through RRC signaling after successful access;
optionally, if SRB3 is not configured, the UE reports a second feedback message through the MAC CE after successful access;
the second feedback message comprises at least one of the following:
indication information that the switching of the PCell corresponding to the PSCell is not executed;
and only instruction information for switching the PSCell is executed.
Optionally, if the SRB3 is configured, the UE initiates access to the PSCell, and triggers MCG failure information to be reported to the network after the access is successful;
step 2-2: optionally, the UE initiates access to the PCell and the PSCell corresponding to the PCell.
Step 2-2a: optionally, the UE is successfully accessed to the target PCell and the corresponding target PSCell;
step 2-2b: optionally, if the UE successfully accesses the target PCell but does not successfully access the target PSCell, then:
the UE triggers SCG failure reporting, or;
and the UE reports the first feedback message.
Wherein the first feedback message comprises at least one of:
indication information of a PSCell that failed to execute;
performing only indication information of handover of the PCell.
Step 2-3c: optionally, if the UE successfully accesses the target PSCell but does not successfully access the target PCell, then:
if the SRB3 and/or the split SRB1 are/is configured, triggering MCG failure reporting, or;
if the SRB3 and/or the split SRB1 are configured, the UE reports the second feedback message through the RRC message, or:
and if the SRB3 and the split SRB1 are not configured, the UE reports the second feedback message through the MAC CE.
Wherein the second feedback message includes at least one of:
indication information of a PCell for which execution failed;
and only instruction information for switching the PSCell is executed.
Examples 4 to 6: and when the UE evaluates and finds that the execution condition of a certain candidate PCell is satisfied and the execution condition of the PScell corresponding to the candidate PCell is also satisfied, the UE side processes the PCell.
Step 1: and when the UE measures and evaluates that the execution condition of a certain candidate PCell is satisfied and the execution condition of the PScell corresponding to the candidate PCell is also satisfied, the UE initiates access to the PCell satisfying the execution condition and the PScell corresponding to the PCell satisfying the execution condition.
Step 2-1: optionally, the UE successfully accesses the target PCell and accesses the corresponding target PSCell;
step 2-2: optionally, if the UE successfully accesses the target PCell but does not successfully access the target PSCell, then:
the UE triggers SCG failure report, or;
and the UE reports the first feedback message.
Wherein the first feedback message comprises at least one of:
indication information of a PSCell that failed to execute;
performing only indication information of handover of the PCell.
Step 2-3: optionally, if the UE successfully accesses the target PSCell but does not successfully access the target PCell, then:
if the SRB3 and/or the split SRB1 are/is configured, triggering MCG failure reporting, or;
if the SRB3 and/or the split SRB1 are configured, the UE reports the second feedback message through the RRC message, or:
and if the SRB3 and the split SRB1 are not configured, the UE reports the second feedback message through a media access control unit (MAC CE).
Wherein the second feedback message includes at least one of:
indication information of a PCell for which execution failed;
and only instruction information for switching the PSCell is executed.
In summary, in the present embodiment of the application, for a conditional PCell handover scenario with PSCell addition or change, a network device may only configure an execution condition for a candidate PCell cell, or only configure an execution condition for a candidate PSCell cell, or respectively configure independent execution conditions for the candidate PCell cell and a corresponding PSCell candidate cell thereof. After the UE receives the configuration of the PCell handover with the PSCell addition or change condition issued by the network side device, the UE may perform measurement and evaluation only on the candidate PCell cells, or perform measurement and evaluation only on the candidate PSCell cells, or simultaneously perform measurement and evaluation on the candidate PCell cells and the candidate PSCell cells associated therewith, respectively, according to the execution condition; and when the execution condition is satisfied, initiating access to the target PCell, and/or the target PSCell.
According to the scheme provided by the embodiment of the application, for a conditional PCell switching scene with PSCell addition or change, the PSCell addition or change is carried out while the (conditional) PCell switching is carried out, so that the PCell switching can be carried out while MRDC is established, the time delay for establishing MRDC is reduced, the network throughput is improved, or the mobility management of the PSCell is completed while the PCell connection is maintained.
Based on the above, referring to fig. 1, it can be seen that, a cell handover control method provided by a network side device in the embodiment of the present application includes:
s101, network side equipment determines that the condition PCell switching with PSCell addition or change needs to be configured;
s102, the network side equipment sends a Radio Resource Control (RRC) reconfiguration message carrying one or more pieces of conditional reconfiguration information to a terminal, wherein the RRC reconfiguration message is used for instructing the terminal to evaluate candidate PCell cells and/or candidate PSCell cells based on execution conditions in the conditional reconfiguration information, and initiates access of corresponding candidate cells after the candidate PCell cells and/or candidate PSCell cells meeting the execution conditions are evaluated and found.
Optionally, the configuration information of conditional reconfiguration includes at least one of:
configuration information for PCell handover, configuration information added or changed by one PSCell, and configuration information related to a corresponding execution condition;
configuration information of PCell handover and configuration information added or changed by at least one PSCell, and corresponding configuration information related to execution conditions.
Optionally, the configuration information related to the execution condition includes one or more execution conditions for conditional reallocation.
Optionally, the execution condition association measurement target of the conditional reallocation is a candidate PCell cell of a PCell, or the execution condition association measurement target of the conditional reallocation is a candidate PSCell cell of a PSCell, wherein,
the execution condition of the conditional reconfiguration with the measurement target of PCell is generated by the source MN side;
the execution condition of the conditional reallocation whose measurement target is the PSCell is generated by the source MN side or the source SN.
Optionally, the execution condition of the conditional reallocation includes at least one of:
measuring an execution condition;
an indication of a reference measurement configuration;
measuring indication information of a target cell which is a PCell or a PSCell;
the identity of the cell group in which the target cell is located is measured.
On the terminal side, referring to fig. 2, a cell handover method provided in an embodiment of the present application includes:
s201, a terminal receives a Radio Resource Control (RRC) reconfiguration message;
s202, acquiring configuration information related to execution conditions configured by network side equipment from the RRC reconfiguration message, wherein the configuration information related to the execution conditions is configured by switching of a conditional primary cell (PCell) with addition or change of a primary cell (PSCell);
s203, determining a measurement evaluation target of the execution condition of the condition reconfiguration in the configuration information related to the execution condition;
s204, performing measurement evaluation on the PCell cell and/or the PSCell cell based on the execution condition of the condition reconfiguration with the measurement evaluation target being the PCell and/or the execution condition of the condition reconfiguration with the measurement evaluation target being the PSCell;
s205, after the candidate PCell cell and/or the candidate PSCell cell meeting the execution condition are/is found through evaluation, the access of the corresponding candidate cell is initiated.
Optionally, determining that a measurement evaluation target of the conditional reallocation execution condition is a PCell and/or a PSCell based on the information of the conditional reallocation execution condition in the configuration information related to the execution condition, specifically including:
determining that a measurement evaluation target of the execution condition of the conditional reconfiguration is a PCell, and/or a PSCell by at least one of:
indication information according to the measurement execution condition and the reference measurement configuration;
according to the indication information that the measurement target cell is a PCell or a PSCell;
according to the Cell group ID of the Cell group where the measurement target Cell is located.
Optionally, after the candidate PCell cells and/or the candidate PSCell cells that satisfy the execution condition are evaluated and found, initiating access to corresponding candidate cells specifically includes:
if the configuration information related to the execution condition only comprises the execution condition of conditional reallocation with the measurement target being a PCell, or simultaneously comprises the execution condition of conditional reallocation with the measurement target being a PCell and a PSCell; and when the terminal measurement evaluation finds that the execution condition of one candidate PCell is satisfied, executing at least one of the following:
initiating access to PCell meeting execution conditions, and reporting a first feedback message after successful access, or triggering SCG failure information of an auxiliary cell group to be reported to network side equipment;
and initiating access to the PCell meeting the execution condition and the PSCell corresponding to the PCell meeting the execution condition.
Optionally, after the candidate PCell cells and/or the candidate PSCell cells that satisfy the execution condition are evaluated and found, initiating access to corresponding candidate cells specifically includes:
if the configuration information related to the execution condition only includes the execution condition of the conditional reallocation of which the measurement target is the PSCell, or includes the execution condition of the conditional reallocation of which the measurement targets are the PSCell and the PCell; and when the terminal measures and evaluates that the execution condition of one candidate PSCell is satisfied, the terminal executes at least one of the following:
initiating access to PSCells meeting execution conditions, and reporting a second feedback message after successful access, or triggering a master cell group failure message MCG failure information to report to network side equipment;
and initiating access to the PSCells meeting the execution conditions and PCell corresponding to the PSCells meeting the execution conditions.
Optionally, after the candidate PCell cells and/or the candidate PSCell cells that satisfy the execution condition are evaluated and found, initiating access to corresponding candidate cells specifically includes:
and if the configuration information related to the execution condition simultaneously contains the execution conditions of the condition reconfiguration with the measurement targets being the PSCells and the PCell, and when the terminal measures and evaluates that the execution conditions of one candidate PCell and one candidate PSCell corresponding to the candidate PCell are simultaneously satisfied, the terminal initiates access to the PCell satisfying the execution conditions and the PSCell corresponding to the PCell satisfying the execution conditions.
Optionally, the method further comprises: if the configuration information related to the execution condition simultaneously contains the execution conditions of the condition reconfiguration of the measurement targets of the PCell and the PScell, when the terminal evaluates that the execution conditions of the candidate PCell are satisfied but the execution conditions of the candidate PScell corresponding to the candidate PCell are not satisfied; or when the terminal evaluates that the execution condition of the candidate PSCell is satisfied but the execution condition of the candidate PCell corresponding to the candidate PSCell is not satisfied, the terminal continues to perform measurement evaluation on the candidate PCell cell and the candidate PSCell cell based on the execution condition of the condition reconfiguration.
Optionally, the method further comprises:
for the situation that the terminal simultaneously initiates access aiming at the PCell and the PSCell, if the PCell access is successful but the PSCell access is failed, the terminal executes at least one of the following operations: triggering SCG failure to report to the network, triggering RRC reconstruction process, and reporting a first feedback message to the network;
if the PSCell access is successful but the PCell access is failed, the terminal executes at least one of the following operations: and triggering MCG failure to report to the network, triggering RRC reconstruction process and reporting a second feedback message to the network.
Optionally, the first feedback message includes at least one of the following:
indication information that addition or change of the PSCell corresponding to the PCell is not performed;
indication information of a PSCell that failed to execute;
indication information for performing handover of only the PCell;
identification information of the PSCell which fails to execute and/or cell group identification information.
Optionally, the second feedback message includes at least one of the following:
indication information that the switching of the PCell corresponding to the PSCell is not executed;
indication information of a PCell for which execution failed;
only the indication information of the change or addition of the PSCell is performed.
In a network side device, referring to fig. 3, a cell handover control apparatus provided in an embodiment of the present application includes:
a memory 520 for storing program instructions;
a processor 500 for calling the program instructions stored in the memory, and executing, according to the obtained program:
if the condition PCell switching with the addition or change of the PSCell is determined to be configured, sending a Radio Resource Control (RRC) reconfiguration message carrying one or more pieces of condition reconfiguration configuration information to the terminal;
the RRC reconfiguration message is used for instructing the terminal to evaluate the candidate PCell cells and/or the candidate PSCell cells based on the execution conditions in the conditional reconfiguration information, and initiating access to the corresponding candidate cells after the candidate PCell cells and/or the candidate PSCell cells meeting the execution conditions are found by evaluation.
Optionally, the configuration information of conditional reconfiguration includes at least one of:
configuration information for PCell handover, configuration information added or changed by one PSCell, and configuration information related to a corresponding execution condition;
configuration information of PCell handover and configuration information added or changed by at least one PSCell, and corresponding configuration information related to execution conditions.
Optionally, the configuration information related to the execution condition includes one or more execution conditions for conditional reallocation;
the execution condition association measurement target of the conditional reassortment is a candidate PCell cell of a PCell, or the execution condition association measurement target of the conditional reassortment is a candidate PSCell cell of a PSCell, wherein,
the execution condition of the conditional reconfiguration with the measurement target of PCell is generated by the source MN side;
the execution condition of the condition reconfiguration with the measurement target of PSCell is generated by a source MN side or a source SN;
the execution condition of the conditional reconfiguration includes at least one of:
measuring an execution condition;
an indication of a reference measurement configuration;
measuring indication information that the target cell is a PCell or a PSCell;
the identity of the cell group in which the target cell is located is measured.
A transceiver 510 for receiving and transmitting data under the control of the processor 500.
Where in fig. 3, the bus architecture may include any number of interconnected buses and bridges, with various circuits being linked together, particularly one or more processors represented by processor 500 and memory represented by memory 520. The bus architecture may also link together various other circuits such as peripherals, voltage regulators, power management circuits, and the like, which are well known in the art, and therefore, will not be described any further herein. The bus interface provides an interface. The transceiver 510 may be a number of elements including a transmitter and a receiver that provide a means for communicating with various other apparatus over a transmission medium. The processor 500 is responsible for managing the bus architecture and general processing, and the memory 520 may store data used by the processor 500 in performing operations.
The processor 500 may be a Central Processing Unit (CPU), an Application Specific Integrated Circuit (ASIC), a Field Programmable Gate Array (FPGA), or a Complex Programmable Logic Device (CPLD).
On the terminal side, referring to fig. 4, a cell switching apparatus provided in an embodiment of the present application includes:
a memory 620 for storing program instructions;
a processor 600, configured to call the program instructions stored in the memory, and execute, according to the obtained program:
receiving a Radio Resource Control (RRC) reconfiguration message;
acquiring configuration information related to an execution condition configured by network side equipment from the RRC reconfiguration message, wherein the configuration information related to the execution condition is configured for switching a conditional primary cell (PCell) with addition or change of a primary cell (PSCell) and a secondary cell (PSCell);
determining a measurement evaluation target of an execution condition of the condition reconfiguration in the execution condition-related configuration information;
performing measurement evaluation on the PCell cell and/or the PSCell cell based on the execution condition of the condition reconfiguration with the measurement evaluation target of the PCell and/or the execution condition of the condition reconfiguration with the measurement evaluation target of the PSCell;
and after the candidate PCell cell and/or the candidate PSCell cell meeting the execution condition are/is evaluated and found, initiating the access of the corresponding candidate cell.
Optionally, determining that a measurement evaluation target of the condition reconfiguration execution condition is a PCell and/or a PSCell based on the information of the condition reconfiguration execution condition in the configuration information related to the execution condition, specifically includes:
determining that the measurement evaluation target of the execution condition of the condition reconfiguration is PCell and/or PSCell by at least one of the following methods:
indication information according to the measurement execution condition and the reference measurement configuration;
according to the indication information that the measurement target cell is a PCell or a PSCell;
and according to the Cell group ID of the Cell group where the measurement target Cell is located.
Optionally, after the candidate PCell cells and/or candidate PSCell cells that satisfy the execution condition are evaluated and found, initiating access to corresponding candidate cells specifically includes:
if the configuration information related to the execution condition only comprises the execution condition of conditional reallocation with the measurement target being a PCell, or simultaneously comprises the execution condition of conditional reallocation with the measurement target being a PCell and a PSCell; and when the measurement evaluation finds that the execution condition of one candidate PCell is satisfied, executing at least one of the following:
initiating access to a PCell meeting execution conditions, and reporting a first feedback message after successful access, or triggering SCG failure information to be reported to network side equipment;
and initiating access to the PCell meeting the execution condition and the PSCell corresponding to the PCell meeting the execution condition.
Optionally, after the candidate PCell cells and/or candidate PSCell cells that satisfy the execution condition are evaluated and found, initiating access to corresponding candidate cells specifically includes:
if the configuration information related to the execution condition only comprises the execution condition of the conditional reconfiguration with the measurement target being the PSCell, or simultaneously comprises the execution condition of the conditional reconfiguration with the measurement targets being the PSCell and the PCell; and when the measurement evaluation finds that the execution condition of one candidate PSCell is satisfied, the terminal executes at least one of the following:
initiating access to the PSCell meeting the execution condition, and reporting a second feedback message after successful access, or triggering a master cell group failure message MCG failure information to report to network side equipment;
and initiating access to the PSCells meeting the execution conditions and the PCell corresponding to the PSCells meeting the execution conditions.
Optionally, after the candidate PCell cells and/or candidate PSCell cells that satisfy the execution condition are evaluated and found, initiating access to corresponding candidate cells specifically includes:
and if the configuration information related to the execution condition simultaneously contains the execution conditions of the condition reconfiguration with the measurement targets of the PSCells and the PCell, and when the measurement evaluation finds that the execution conditions of one candidate PCell and one candidate PScell corresponding to the candidate PCell are simultaneously satisfied, initiating access to the PCell satisfying the execution conditions and the PScell corresponding to the PCell satisfying the execution conditions.
Optionally, the processor 600 is further configured to: if the configuration information related to the execution condition simultaneously contains the execution conditions of the condition reconfiguration of the measurement targets of the PCell and the PScell, when the execution conditions of the candidate PCell are found to be satisfied through evaluation, but the execution conditions of the candidate PScell corresponding to the candidate PCell are not satisfied; or when the execution condition of the candidate PSCell is found to be met through evaluation, but the execution condition of the candidate PCell corresponding to the candidate PSCell is not met, continuing to perform measurement evaluation on the candidate PCell cell and the candidate PSCell cell based on the execution condition of the condition reconfiguration.
Optionally, the processor 600 is further configured to:
for the case of initiating access to the PCell and the PSCell simultaneously, if the PCell access is successful but the PSCell access is failed, performing at least one of the following operations: triggering SCG failure to report to the network, triggering RRC reconstruction process, and reporting a first feedback message to the network;
if the PSCell access is successful but the PCell access is failed, executing at least one of the following operations: and triggering MCG failure to report to the network, triggering RRC reconstruction process and reporting a second feedback message to the network.
Optionally, the first feedback message includes at least one of:
indication information that addition or change of the PSCell corresponding to the PCell is not performed;
indication information of a PSCell that failed to execute;
indication information for performing only handover of the PCell;
identification information of the PSCell which fails to execute and/or cell group identification information.
Optionally, the second feedback message includes at least one of the following:
indication information that the switching of the PCell corresponding to the PSCell is not executed;
indication information of a PCell for which execution failed;
only the indication information of the change or addition of the PSCell is performed.
A transceiver 610 for receiving and transmitting data under the control of the processor 600.
Wherein in fig. 4, the bus architecture may comprise any number of interconnected buses and bridges, with one or more processors, represented by processor 600, and various circuits, represented by memory 620, being linked together. The bus architecture may also link together various other circuits such as peripherals, voltage regulators, power management circuits, and the like, which are well known in the art, and therefore, will not be described any further herein. The bus interface provides an interface. The transceiver 610 may be a number of elements including a transmitter and a receiver that provide a means for communicating with various other apparatus over a transmission medium. For different user devices, the user interface 630 may also be an interface capable of interfacing with a desired device externally, including but not limited to a keypad, display, speaker, microphone, joystick, etc.
The processor 600 is responsible for managing the bus architecture and general processing, and the memory 620 may store data used by the processor 600 in performing operations.
Alternatively, the processor 600 may be a CPU (central processing unit), an ASIC (Application Specific Integrated Circuit), an FPGA (Field Programmable Gate Array), or a CPLD (Complex Programmable Logic Device).
Referring to fig. 5, another cell handover control apparatus provided in an embodiment of the present application in a network side device includes:
a determining unit 11, configured to determine that a conditional PCell handover with PSCell addition or change needs to be configured;
a sending unit 12, configured to send a radio resource control RRC reconfiguration message carrying one or more pieces of conditional reconfiguration configuration information to a terminal, where the RRC reconfiguration message is used to instruct the terminal to evaluate a candidate PCell cell and/or a candidate PSCell cell based on an execution condition in the conditional reconfiguration configuration information, and initiate access to a corresponding candidate cell after the candidate PCell cell and/or the candidate PSCell cell satisfying the execution condition are found by the evaluation.
Optionally, the configuration information of conditional reconfiguration includes at least one of:
configuration information of PCell switching, configuration information added or changed by a PSCell and configuration information related to corresponding execution conditions;
configuration information of PCell handover and configuration information added or changed by at least one PSCell, and corresponding configuration information related to execution conditions.
Optionally, the configuration information related to the execution condition includes one or more execution conditions for conditional reallocation;
optionally, the execution condition associated measurement target of the conditional reallocation is a candidate PCell cell of a PCell, or the execution condition associated measurement target of the conditional reallocation is a candidate PSCell cell of a PSCell, wherein,
the execution condition of the conditional reconfiguration with the measurement target of PCell is generated by the source MN side;
the execution condition of the condition reconfiguration with the measurement target of PSCell is generated by a source MN side or a source SN;
optionally, the execution condition of the conditional reallocation includes at least one of:
measuring an execution condition;
an indication of a reference measurement configuration;
measuring indication information that the target cell is a PCell or a PSCell;
the identity of the cell group in which the target cell is located is measured.
On the terminal side, referring to fig. 6, another cell switching apparatus provided in the embodiment of the present application includes:
a receiving unit 21, configured to receive a radio resource control RRC reconfiguration message;
an obtaining unit 22, configured to obtain, from the RRC reconfiguration message, configuration information related to an execution condition configured by a network side device, where the configuration information related to the execution condition is configured for switching a primary cell PCell to which a primary and secondary cell PSCell is added or changed;
a determination unit 23 configured to determine a measurement evaluation target of an execution condition of the condition reallocation in the execution condition-related configuration information;
an evaluation unit 24, configured to perform measurement evaluation on the PCell cell and/or the PSCell cell based on an execution condition of conditional reallocation for which a measurement evaluation target is a PCell and/or an execution condition of conditional reallocation for which a measurement evaluation target is a PSCell;
an access unit 25, configured to initiate access to a corresponding candidate cell after evaluating and finding a candidate PCell cell and/or a candidate PSCell cell that satisfy an execution condition.
Optionally, determining that a measurement evaluation target of the condition reconfiguration execution condition is a PCell and/or a PSCell based on the information of the condition reconfiguration execution condition in the configuration information related to the execution condition, specifically includes:
determining that the measurement evaluation target of the execution condition of the condition reconfiguration is PCell and/or PSCell by at least one of the following methods:
indication information according to the measurement execution condition and the reference measurement configuration;
according to the indication information that the measurement target cell is a PCell or a PSCell;
according to the Cell group ID of the Cell group where the measurement target Cell is located.
Optionally, after the candidate PCell cells and/or candidate PSCell cells that satisfy the execution condition are evaluated and found, initiating access to corresponding candidate cells specifically includes:
if the configuration information related to the execution condition only comprises the execution condition of the condition reconfiguration with the measurement target being the PCell, or simultaneously comprises the execution condition of the condition reconfiguration with the measurement targets being the PCell and the PSCell; and when the measurement evaluation finds that the execution condition of one candidate PCell is satisfied, executing at least one of the following:
initiating access to PCell meeting execution conditions, and reporting a first feedback message after successful access, or triggering SCG failure information of an auxiliary cell group to be reported to network side equipment;
and initiating access to the PCell meeting the execution condition and the PSCell corresponding to the PCell meeting the execution condition.
Optionally, after the candidate PCell cells and/or the candidate PSCell cells that satisfy the execution condition are evaluated and found, initiating access to corresponding candidate cells specifically includes:
if the configuration information related to the execution condition only includes the execution condition of the conditional reallocation of which the measurement target is the PSCell, or includes the execution condition of the conditional reallocation of which the measurement targets are the PSCell and the PCell; and when the measurement evaluation finds that the execution condition of one candidate PSCell is satisfied, the terminal executes at least one of the following:
initiating access to the PSCell meeting the execution condition, and reporting a second feedback message after successful access, or triggering a master cell group failure message MCG failure information to report to network side equipment;
and initiating access to the PSCells meeting the execution conditions and the PCell corresponding to the PSCells meeting the execution conditions.
Optionally, after the candidate PCell cells and/or candidate PSCell cells that satisfy the execution condition are evaluated and found, initiating access to corresponding candidate cells specifically includes:
and if the configuration information related to the execution conditions simultaneously contains the execution conditions of conditional reconfiguration with measurement targets of the PSCells and the PCell, and when the terminal measures, evaluates and discovers that the execution conditions of one candidate PCell and one candidate PSCell corresponding to the candidate PCell are simultaneously met, initiating access to the PCell meeting the execution conditions and the PSCell corresponding to the PCell meeting the execution conditions.
Optionally, the evaluation unit 24 is further configured to: if the configuration information related to the execution condition contains the execution conditions of conditional reallocation of the measurement targets of the PCell and the PSCell, when the execution conditions of the candidate PCell are found to be met through evaluation, but the execution conditions of the candidate PSCell corresponding to the candidate PCell are not met; or when the evaluation finds that the execution condition of the candidate PSCell is satisfied but the execution condition of the candidate PCell corresponding to the candidate PSCell is not satisfied, continuing to perform measurement evaluation on the candidate PCell cell and the candidate PSCell cell based on the execution condition of the condition reconfiguration.
Optionally, the access unit 25 is further configured to:
for the case of initiating access to the PCell and the PSCell at the same time, if the PCell access succeeds but the PSCell access fails, performing at least one of the following operations: triggering SCG failure to report to the network, triggering RRC reconstruction process, and reporting a first feedback message to the network;
if the PSCell access is successful but the PCell access is failed, executing at least one of the following operations: and triggering MCG failure to report to the network, triggering RRC reconstruction process and reporting a second feedback message to the network.
Optionally, the first feedback message includes at least one of:
indication information that addition or change of the PSCell corresponding to the PCell is not performed;
indication information of a PSCell that failed to execute;
indication information for performing handover of only the PCell;
identification information of PSCell and/or cell group identification information that failed to execute.
Optionally, the second feedback message includes at least one of the following:
indication information that the switching of the PCell corresponding to the PSCell is not executed;
indication information of a PCell for which execution failed;
only the indication information of the change or addition of the PSCell is performed.
It should be noted that, in the embodiment of the present application, the division of the unit is schematic, and is only one logic function division, and when the actual implementation is realized, another division manner may be provided. In addition, functional units in the embodiments of the present application may be integrated into one processing unit, or each unit may exist alone physically, or two or more units are integrated into one unit. The integrated unit can be realized in a form of hardware, and can also be realized in a form of a software functional unit.
The integrated unit, if implemented in the form of a software functional unit and sold or used as a stand-alone product, may be stored in a computer readable storage medium. Based on such understanding, the technical solution of the present application may be substantially implemented or contributed by the prior art, or all or part of the technical solution may be embodied in a software product, which is stored in a storage medium and includes instructions for causing a computer device (which may be a personal computer, a server, a network device, or the like) or a processor (processor) to execute all or part of the steps of the method according to the embodiments of the present application. And the aforementioned storage medium includes: various media capable of storing program codes, such as a usb disk, a removable hard disk, a Read-Only Memory (ROM), a Random Access Memory (RAM), a magnetic disk, or an optical disk.
The embodiment of the present application provides a computing device, which may specifically be a desktop computer, a portable computer, a smart phone, a tablet computer, a Personal Digital Assistant (PDA), and the like. The computing device may include a Central Processing Unit (CPU), memory, input/output devices, etc., the input devices may include a keyboard, mouse, touch screen, etc., and the output devices may include a Display device, such as a Liquid Crystal Display (LCD), cathode Ray Tube (CRT), etc.
The memory may include Read Only Memory (ROM) and Random Access Memory (RAM), and provides the processor with program instructions and data stored in the memory. In the embodiment of the present application, the memory may be used to store a program of any one of the methods provided in the embodiment of the present application.
The processor is used for executing any one of the methods provided by the embodiment of the application according to the obtained program instructions by calling the program instructions stored in the memory.
Embodiments of the present application provide a computer storage medium for storing computer program instructions for an apparatus provided in the embodiments of the present application, which includes a program for executing any one of the methods provided in the embodiments of the present application.
The computer storage media may be any available media or data storage device that can be accessed by a computer, including, but not limited to, magnetic memory (e.g., floppy disks, hard disks, magnetic tape, magneto-optical disks (MOs), etc.), optical memory (e.g., CDs, DVDs, BDs, HVDs, etc.), and semiconductor memory (e.g., ROMs, EPROMs, EEPROMs, non-volatile memories (NAND FLASH), solid State Disks (SSDs)), etc.
The method provided by the embodiment of the application can be applied to terminal equipment and also can be applied to network equipment.
The Terminal device may also be referred to as a User Equipment (UE), a Mobile Station (MS), a Mobile Terminal (Mobile Terminal), or the like, and optionally, the Terminal may have a capability of communicating with one or more core networks via a Radio Access Network (RAN), for example, the Terminal may be a Mobile phone (or a "cellular" phone), a computer with Mobile property, or the like, and for example, the Terminal may also be a portable, pocket, handheld, computer-embedded, or vehicle-mounted Mobile device.
A network device may be a base station (e.g., access point) that refers to a device in an access network that communicates over the air-interface, through one or more sectors, with wireless terminals. The base station may be configured to interconvert received air frames and IP packets as a router between the wireless terminal and the rest of the access network, which may include an Internet Protocol (IP) network. The base station may also coordinate management of attributes for the air interface. For example, the Base Station may be a Base Transceiver Station (BTS) in GSM or CDMA, a Base Station (NodeB) in WCDMA, an evolved Node B (NodeB or eNB or e-NodeB) in LTE, or a gNB in 5G system. The embodiments of the present application are not limited.
The above method process flow may be implemented by a software program, which may be stored in a storage medium, and when the stored software program is called, the above method steps are performed.
As will be appreciated by one skilled in the art, embodiments of the present application may be provided as a method, system, or computer program product. Accordingly, the present application may take the form of an entirely hardware embodiment, an entirely software embodiment or an embodiment combining software and hardware aspects. Furthermore, the present application may take the form of a computer program product embodied on one or more computer-usable storage media (including, but not limited to, disk storage, optical storage, and the like) having computer-usable program code embodied therein.
The present application is described with reference to flowchart illustrations and/or block diagrams of methods, apparatus (systems), and computer program products according to embodiments of the application. It will be understood that each flow and/or block of the flow diagrams and/or block diagrams, and combinations of flows and/or blocks in the flow diagrams and/or block diagrams, can be implemented by computer program instructions. These computer program instructions may be provided to a processor of a general purpose computer, special purpose computer, embedded processor, or other programmable data processing apparatus to produce a machine, such that the instructions, which execute via the processor of the computer or other programmable data processing apparatus, create means for implementing the functions specified in the flowchart flow or flows and/or block diagram block or blocks.
These computer program instructions may also be stored in a computer-readable memory that can direct a computer or other programmable data processing apparatus to function in a particular manner, such that the instructions stored in the computer-readable memory produce an article of manufacture including instruction means which implement the function specified in the flowchart flow or flows and/or block diagram block or blocks.
These computer program instructions may also be loaded onto a computer or other programmable data processing apparatus to cause a series of operational steps to be performed on the computer or other programmable apparatus to produce a computer implemented process such that the instructions which execute on the computer or other programmable apparatus provide steps for implementing the functions specified in the flowchart flow or flows and/or block diagram block or blocks.
It will be apparent to those skilled in the art that various changes and modifications may be made in the present application without departing from the spirit and scope of the application. Thus, if such modifications and variations of the present application fall within the scope of the claims of the present application and their equivalents, the present application is intended to include such modifications and variations as well.
Claims (25)
1. A method for controlling cell handover, the method comprising:
if determining that the condition PCell switching with the addition or change of the PSCell is configured, the network side equipment sends a Radio Resource Control (RRC) reconfiguration message carrying one or more pieces of condition reconfiguration configuration information to the terminal;
the RRC reconfiguration message is used for instructing the terminal to evaluate the candidate PCell cells and/or the candidate PSCell cells based on the execution conditions in the conditional reconfiguration information, and initiating access of the corresponding candidate cells after the candidate PCell cells and/or the candidate PSCell cells meeting the execution conditions are evaluated and found.
2. The method of claim 1, wherein the configuration information of the conditional reallocation comprises at least one of:
configuration information for PCell handover, configuration information added or changed by one PSCell, and configuration information related to a corresponding execution condition;
configuration information of PCell handover and configuration information added or changed by at least one PSCell, and corresponding configuration information related to execution conditions.
3. The method according to claim 2, wherein the configuration information related to the execution condition includes one or more execution conditions for conditional reconfiguration.
4. The method according to claim 3, wherein the conditionally reconfigured performing condition-associated measurement target is a candidate PCell cell of a PCell or a candidate PSCell cell of a PSCell,
the execution condition of the conditional reconfiguration with the measurement target of PCell is generated by the source MN side;
the execution condition of the conditional reallocation whose measurement target is the PSCell is generated by the source MN side or the source SN.
5. The method according to claim 3, wherein the execution condition of the conditional reallocation comprises at least one of:
measuring an execution condition;
an indication of a reference measurement configuration;
measuring indication information that the target cell is a PCell or a PSCell;
the identity of the cell group in which the target cell is located is measured.
6. A method for cell handover, the method comprising:
a terminal receives a Radio Resource Control (RRC) reconfiguration message;
acquiring configuration information related to an execution condition configured by network side equipment from the RRC reconfiguration message, wherein the configuration information related to the execution condition is configured for switching a conditional primary cell (PCell) with addition or change of a primary cell (PSCell) and a secondary cell (PSCell);
determining a measurement evaluation target of an execution condition of the condition reconfiguration in the execution condition-related configuration information;
performing measurement evaluation on the PCell cell and/or the PSCell cell based on the execution condition of the condition reconfiguration with the measurement evaluation target of the PCell and/or the execution condition of the condition reconfiguration with the measurement evaluation target of the PSCell;
and after the candidate PCell cell and/or the candidate PSCell cell meeting the execution condition are/is evaluated and found, initiating the access of the corresponding candidate cell.
7. The method according to claim 6, wherein determining that the measurement evaluation target of the conditionally reconfigured execution condition is the PCell and/or the PSCell based on the information of the conditionally reconfigured execution condition in the execution condition related configuration information specifically includes:
determining that a measurement evaluation target of the execution condition of the conditional reconfiguration is a PCell, and/or a PSCell by at least one of:
indication information according to the measurement execution condition and the reference measurement configuration;
according to the indication information that the measurement target cell is a PCell or a PSCell;
according to the Cell group ID of the Cell group where the measurement target Cell is located.
8. The method according to claim 6, wherein after evaluating and finding candidate PCell cells and/or candidate PSCell cells that satisfy the execution condition, initiating access to corresponding candidate cells specifically comprises:
if the configuration information related to the execution condition only comprises the execution condition of conditional reallocation with the measurement target being a PCell, or simultaneously comprises the execution condition of conditional reallocation with the measurement target being a PCell and a PSCell; and when the terminal measurement evaluation finds that the execution condition of one candidate PCell is satisfied, executing at least one of the following steps:
initiating access to a PCell meeting execution conditions, and reporting a first feedback message after successful access, or triggering SCG failure information to be reported to network side equipment;
and initiating access to the PCell meeting the execution condition and the PSCell corresponding to the PCell meeting the execution condition.
9. The method according to claim 6, wherein after evaluating and finding candidate PCell cells and/or candidate PSCell cells that satisfy the execution condition, initiating access to corresponding candidate cells comprises:
if the configuration information related to the execution condition only includes the execution condition of the conditional reallocation of which the measurement target is the PSCell, or includes the execution condition of the conditional reallocation of which the measurement targets are the PSCell and the PCell; and when the terminal measures and evaluates that the execution condition of one candidate PSCell is satisfied, the terminal executes at least one of the following steps:
initiating access to the PSCell meeting the execution condition, and reporting a second feedback message after successful access, or triggering a master cell group failure message MCG failure information to report to network side equipment;
and initiating access to the PSCells meeting the execution conditions and the PCell corresponding to the PSCells meeting the execution conditions.
10. The method according to claim 6, wherein after evaluating and finding candidate PCell cells and/or candidate PSCell cells that satisfy the execution condition, initiating access to corresponding candidate cells comprises:
and if the configuration information related to the execution conditions simultaneously contains the execution conditions of conditional reconfiguration with measurement targets of the PSCells and the PCell, and when the terminal measures and evaluates that one candidate PCell and the execution condition of one candidate PScell corresponding to the candidate PCell are simultaneously met, the terminal initiates access to the PCell meeting the execution conditions and the PSCell corresponding to the PCell meeting the execution conditions.
11. The method of claim 6, further comprising:
if the configuration information related to the execution condition simultaneously contains the execution conditions of the condition reconfiguration of the measurement targets of the PCell and the PScell, when the terminal evaluates that the execution conditions of the candidate PCell are satisfied but the execution conditions of the candidate PScell corresponding to the candidate PCell are not satisfied; or when the terminal evaluates that the execution condition of the candidate PSCell is satisfied but the execution condition of the candidate PCell corresponding to the candidate PSCell is not satisfied, the terminal continues to perform measurement evaluation on the candidate PCell cell and the candidate PSCell cell based on the execution condition of condition reconfiguration.
12. The method of claim 8, 9 or 10, further comprising:
for the situation that the terminal simultaneously initiates access aiming at the PCell and the PSCell, if the PCell access is successful but the PSCell access is failed, the terminal executes at least one of the following operations: triggering SCG failure reporting to the network, triggering RRC reestablishment process, and reporting a first feedback message to the network;
if the PSCell access is successful but the PCell access is failed, the terminal executes at least one of the following operations: and triggering MCG failure to report to the network, triggering RRC reestablishment process and reporting a second feedback message to the network.
13. The method according to claim 8 or 12, wherein the first feedback message comprises at least one of:
indication information that addition or change of the PSCell corresponding to the PCell is not performed;
indication information of a PSCell that failed to execute;
indication information for performing only handover of the PCell;
identification information of PSCell and/or cell group identification information that failed to execute.
14. The method according to claim 9 or 12, wherein the second feedback message comprises at least one of:
indication information that the switching of the PCell corresponding to the PSCell is not executed;
indication information of a PCell for which execution failed;
only the indication information of the change or addition of the PSCell is performed.
15. A cell handover control apparatus, comprising:
a memory for storing program instructions;
a processor for calling the program instructions stored in the memory and executing according to the obtained program:
if the condition PCell switching with the addition or change of the PSCell is determined to be configured, sending a Radio Resource Control (RRC) reconfiguration message carrying one or more pieces of condition reconfiguration configuration information to the terminal;
the RRC reconfiguration message is used for instructing the terminal to evaluate the candidate PCell cells and/or the candidate PSCell cells based on the execution conditions in the conditional reconfiguration information, and initiating access to the corresponding candidate cells after the candidate PCell cells and/or the candidate PSCell cells meeting the execution conditions are found by evaluation.
16. The apparatus of claim 15, wherein the configuration information of the conditional reconfiguration comprises at least one of:
configuration information of PCell switching, configuration information added or changed by a PSCell and configuration information related to corresponding execution conditions;
configuration information of PCell handover and configuration information added or changed by at least one PSCell, and corresponding configuration information related to execution conditions.
17. The apparatus according to claim 16, wherein the configuration information related to the execution condition includes one or more execution conditions for conditional reallocation;
the execution condition association measurement target of the conditional reassortment is a candidate PCell cell of a PCell, or the execution condition association measurement target of the conditional reassortment is a candidate PSCell cell of a PSCell, wherein,
the execution condition of the conditional reconfiguration with the measurement target of PCell is generated by the source MN side;
the execution condition of the condition reconfiguration with the measurement target of the PSCell is generated by a source MN side or a source SN;
the execution condition of the conditional reconfiguration includes at least one of:
measuring an execution condition;
an indication of a reference measurement configuration;
measuring indication information that the target cell is a PCell or a PSCell;
the identity of the cell group in which the target cell is located is measured.
18. A cell switching apparatus, comprising:
a memory for storing program instructions;
a processor for calling the program instructions stored in the memory and executing according to the obtained program:
receiving a Radio Resource Control (RRC) reconfiguration message;
acquiring configuration information related to execution conditions configured by network side equipment from the RRC reconfiguration message, wherein the configuration information related to the execution conditions is configured by switching of a conditional primary cell (PCell) with addition or change of a primary cell (PSCell);
determining a measurement evaluation target of an execution condition of the condition reconfiguration in the execution condition-related configuration information;
performing measurement evaluation on the PCell cell and/or the PSCell cell based on the execution condition of the condition reconfiguration with the measurement evaluation target of the PCell and/or the execution condition of the condition reconfiguration with the measurement evaluation target of the PSCell;
and after the candidate PCell cell and/or the candidate PSCell cell meeting the execution condition is evaluated and found, initiating access of the corresponding candidate cell.
19. The apparatus according to claim 18, wherein determining that the measurement evaluation target of the conditionally reconfigured performing condition is PCell and/or PSCell based on the information of the conditionally reconfigured performing condition in the performing condition-related configuration information specifically includes:
determining that a measurement evaluation target of the execution condition of the conditional reconfiguration is a PCell, and/or a PSCell by at least one of:
indication information according to the measurement execution condition and the reference measurement configuration;
according to the indication information that the measurement target cell is a PCell or a PSCell;
according to the Cell group ID of the Cell group where the measurement target Cell is located.
20. The apparatus according to claim 18, wherein after evaluating candidate PCell cells and/or candidate PSCell cells found to satisfy the execution condition, initiating access to corresponding candidate cells comprises:
if the configuration information related to the execution condition only comprises the execution condition of conditional reallocation with the measurement target being a PCell, or simultaneously comprises the execution condition of conditional reallocation with the measurement target being a PCell and a PSCell; and when the terminal measurement evaluation finds that the execution condition of one candidate PCell is satisfied, executing at least one of the following:
initiating access to a PCell meeting execution conditions, and reporting a first feedback message after successful access, or triggering SCG failure information to be reported to network side equipment;
and initiating access to the PCell meeting the execution condition and the PSCell corresponding to the PCell meeting the execution condition.
21. The apparatus according to claim 18, wherein after evaluating and finding candidate PCell cells and/or candidate PSCell cells that satisfy the execution condition, initiating access to corresponding candidate cells comprises:
if the configuration information related to the execution condition only comprises the execution condition of the conditional reconfiguration with the measurement target being the PSCell, or simultaneously comprises the execution condition of the conditional reconfiguration with the measurement targets being the PSCell and the PCell; and when the terminal measures and evaluates that the execution condition of one candidate PSCell is satisfied, the terminal executes at least one of the following steps:
initiating access to PSCells meeting execution conditions, and reporting a second feedback message after successful access, or triggering a master cell group failure message MCG failure information to report to network side equipment;
and initiating access to the PSCells meeting the execution conditions and PCell corresponding to the PSCells meeting the execution conditions.
22. The apparatus according to claim 18, wherein after evaluating candidate PCell cells and/or candidate PSCell cells found to satisfy the execution condition, initiating access to corresponding candidate cells comprises:
and if the configuration information related to the execution conditions simultaneously contains the execution conditions of conditional reconfiguration with measurement targets of the PSCells and the PCell, and when the terminal measures and evaluates that one candidate PCell and the execution condition of one candidate PScell corresponding to the candidate PCell are simultaneously met, the terminal initiates access to the PCell meeting the execution conditions and the PSCell corresponding to the PCell meeting the execution conditions.
23. A cell handover control apparatus, comprising:
a determining unit, configured to determine that a conditional PCell handover with PSCell addition or change needs to be configured;
a sending unit, configured to send a radio resource control, RRC, reconfiguration message carrying one or more pieces of conditional reconfiguration configuration information to a terminal, where the RRC reconfiguration message is used to instruct the terminal to evaluate a candidate PCell cell and/or a candidate PSCell cell based on an execution condition in the conditional reconfiguration configuration information, and initiate access to a corresponding candidate cell after the candidate PCell cell and/or the candidate PSCell cell satisfying the execution condition are/is found by the evaluation.
24. A cell switching apparatus, comprising:
a receiving unit, configured to receive a radio resource control RRC reconfiguration message;
an obtaining unit, configured to obtain, from the RRC reconfiguration message, configuration information related to an execution condition configured by a network side device, where the configuration information related to the execution condition is configured for a conditional primary cell PCell with addition or change of a primary and secondary cell PSCell;
a determination unit configured to determine a measurement evaluation target of an execution condition of the condition reallocation in the execution condition-related configuration information;
the evaluation unit is used for performing measurement evaluation on the PCell cell and/or the PSCell cell based on the execution condition of the condition reconfiguration with the measurement evaluation target being the PCell and/or the execution condition of the condition reconfiguration with the measurement evaluation target being the PSCell;
and the access unit is used for initiating access of the corresponding candidate cell after evaluating and finding the candidate PCell cell and/or the candidate PSCell cell meeting the execution condition.
25. A computer storage medium having computer-executable instructions stored thereon for causing a computer to perform the method of any one of claims 1 to 14.
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| CN202110508632.9A CN115334599A (en) | 2021-05-11 | 2021-05-11 | Cell switching and control method and device thereof |
| PCT/CN2022/091802 WO2022237740A1 (en) | 2021-05-11 | 2022-05-09 | Cell handover, and control method and apparatus therefor |
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| CN117296425A (en) * | 2023-08-08 | 2023-12-26 | 北京小米移动软件有限公司 | Information indicating method, terminal, network device, communication system and storage medium |
| WO2024046272A1 (en) * | 2022-08-30 | 2024-03-07 | 大唐移动通信设备有限公司 | Information transmission method and apparatus, and storage medium |
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| CN117998395A (en) * | 2022-11-04 | 2024-05-07 | 中国移动通信有限公司研究院 | Configuration method, device, related equipment and storage medium |
| WO2024073988A1 (en) * | 2023-01-19 | 2024-04-11 | Lenovo (Beijing) Limited | Methods and apparatuses for a cho with candidate scg mechanism |
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| WO2021067236A1 (en) * | 2019-10-01 | 2021-04-08 | Idac Holdings, Inc. | Conditional mobility with multi-connectivity |
| CN111901839A (en) * | 2020-04-02 | 2020-11-06 | 中兴通讯股份有限公司 | Cell management method, device, equipment and storage medium |
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| WO2024046272A1 (en) * | 2022-08-30 | 2024-03-07 | 大唐移动通信设备有限公司 | Information transmission method and apparatus, and storage medium |
| CN117296425A (en) * | 2023-08-08 | 2023-12-26 | 北京小米移动软件有限公司 | Information indicating method, terminal, network device, communication system and storage medium |
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