CN113038551B - Auxiliary cell group Failure SCG Failure processing method and device - Google Patents

Auxiliary cell group Failure SCG Failure processing method and device Download PDF

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Publication number
CN113038551B
CN113038551B CN201911359682.4A CN201911359682A CN113038551B CN 113038551 B CN113038551 B CN 113038551B CN 201911359682 A CN201911359682 A CN 201911359682A CN 113038551 B CN113038551 B CN 113038551B
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base station
terminal
detecting
auxiliary base
scgfailure
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CN113038551A (en
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边燕
周涛
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Datang Mobile Communications Equipment Co Ltd
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Datang Mobile Communications Equipment Co Ltd
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    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W36/00—Hand-off or reselection arrangements
    • H04W36/0005—Control or signalling for completing the hand-off
    • H04W36/0011—Control or signalling for completing the hand-off for data sessions of end-to-end connection
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W36/00—Hand-off or reselection arrangements
    • H04W36/34—Reselection control
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W52/00—Power management, e.g. TPC [Transmission Power Control], power saving or power classes
    • H04W52/02—Power saving arrangements
    • H04W52/0209—Power saving arrangements in terminal devices
    • H04W52/0261—Power saving arrangements in terminal devices managing power supply demand, e.g. depending on battery level
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W76/00—Connection management
    • H04W76/10—Connection setup
    • H04W76/15—Setup of multiple wireless link connections
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W76/00—Connection management
    • H04W76/10—Connection setup
    • H04W76/18—Management of setup rejection or failure
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W76/00—Connection management
    • H04W76/30—Connection release
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02D—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN INFORMATION AND COMMUNICATION TECHNOLOGIES [ICT], I.E. INFORMATION AND COMMUNICATION TECHNOLOGIES AIMING AT THE REDUCTION OF THEIR OWN ENERGY USE
    • Y02D30/00—Reducing energy consumption in communication networks
    • Y02D30/70—Reducing energy consumption in communication networks in wireless communication networks

Abstract

The embodiment of the invention provides a method and a device for processing SCG Failure of an auxiliary cell group. The method is applied to a main base station, and comprises the following steps: detecting that a terminal generates SCGFailure in an auxiliary base station, and the terminal is not accessed to a cell of the auxiliary base station within a first preset time; and adding the terminal into a forbidden list forbidden to be switched to double connection, and deleting a double connection link of the terminal. The terminal is forced to reside in the cell of the main base station, the terminal is limited to be switched to the cell of the auxiliary base station through double connection, the situation that an EN-DC link is frequently deleted and established between the main base station and the auxiliary base station is avoided, signaling overhead of a network side is reduced, and waste of wireless resources is avoided; meanwhile, the pressure of the UE side is reduced, and the electric quantity of the UE is saved. The embodiment of the invention solves the problem that in the prior art, when the UE generates SCG Failure, the NSA system can continuously delete and build the EN-DC link.

Description

Auxiliary cell group Failure SCG Failure processing method and device
Technical Field
The invention relates to the technical field of mobile communication, in particular to a method and a device for processing SCG Failure of an auxiliary cell group.
Background
With the rapid development of mobile internet and internet of things technologies, higher and higher requirements are put on the transmission rate and the transmission delay of a wireless communication system. In order to achieve higher transmission rates and lower transmission delays, The 3rd Generation Partnership Project (3 GPP) introduced Dual Connectivity (DC) technology. The DC technique means that a single User Equipment (UE) can establish communication links with two base stations respectively at the same time, and perform uplink and downlink communication through a dual communication link, thereby achieving higher-rate data transmission and lower time delay, and improving the performance of the wireless communication system.
The dual communication link can better utilize radio resources compared to the single communication link. At present, in a Non-independent Networking (NSA) network, if a Secondary Cell Group Failure (SCG Failure) occurs on a Secondary base Station (SN) side of a User Equipment or a terminal (UE), the UE cannot access to a Cell covered by an SN; at this time, if the adding threshold of the Dual connection (E-UTRA-NR Dual Connectivity, EN-DC) link between the 4G radio access network and the 5G radio access network is met, the NSA system may continuously perform the deleting and establishing process of the EN-DC link, which affects the service performance of the NSA network side and the UE side.
Disclosure of Invention
The embodiment of the invention provides a method and a device for SCG Failure processing of an auxiliary cell group, which aim to solve the problem that in the prior art, when SCG Failure occurs in UE, an NSA system can continuously delete an EN-DC link.
In one aspect, an embodiment of the present invention provides a secondary cell group Failure SCG Failure processing method, which is applied to a primary base station, and the method includes:
detecting that a terminal generates SCG Failure in an auxiliary base station, and the terminal is not accessed to a cell of the auxiliary base station within continuous first preset time;
and adding the terminal into a forbidden list forbidden to be switched to double connection, and deleting a double connection link of the terminal.
Optionally, the method further comprises:
stopping responding to the B1 event after receiving the B1 event reported by the terminal; the B1 event carries the signal quality of the cell of the secondary base station measured by the terminal, and the signal quality is higher than a preset threshold.
Optionally, the step of detecting that the terminal has SCG Failure at the secondary base station and the terminal has not yet accessed to the cell of the secondary base station within a first preset time includes:
detecting that the SCG Failure occurs in the auxiliary base station by the terminal, and starting a preset timer; the timing time of the timer is first preset time;
and detecting that the terminal is not accessed to the cell of the auxiliary base station after the timer is overtime.
Optionally, before the step of detecting that the terminal generates the SCG Failure at the secondary base station, the method includes:
and detecting that the terminal accesses the cell of the main base station through the non-independent network NSA, wherein the main base station adds the double-connection link for the terminal.
Optionally, the step of detecting that the terminal generates the SCG Failure at the secondary base station includes:
and detecting that the terminal is switched to a target auxiliary base station, and generating SCG Failure at the side of the target auxiliary base station.
Optionally, the step of detecting that the terminal is switched to the target secondary base station includes:
detecting that the terminal keeps the connection with the main base station, and switching the original auxiliary base station to a target auxiliary base station;
detecting that the terminal executes NSA switching, and switching from the original auxiliary base station to a target auxiliary base station;
or
And switching the terminal to a target auxiliary base station when the terminal is detected to be switched from the Long Term Evolution (LTE) network to the NSA.
On the other hand, an embodiment of the present invention further provides a secondary cell group Failure SCG Failure processing apparatus, which is applied to a primary base station, and the apparatus includes:
the detection module is used for detecting that the SCG Failure occurs in the auxiliary base station by the terminal, and the terminal is not accessed to the cell of the auxiliary base station within continuous first preset time;
and the processing module is used for adding the terminal into a forbidden list forbidden to be switched to double connection and deleting a double connection link of the terminal.
Optionally, the apparatus further comprises:
a response module, configured to stop responding to the B1 event after receiving the B1 event reported by the terminal; the B1 event carries the signal quality of the cell of the secondary base station measured by the terminal, and the signal quality is higher than a preset threshold.
Optionally, the detection module includes:
the first detection submodule is used for detecting that the terminal generates SCG Failure in the auxiliary base station and starting a preset timer; the timing time of the timer is first preset time;
and the second detection submodule is used for detecting that the terminal is not accessed to the cell of the auxiliary base station after the timer is overtime.
Optionally, the apparatus comprises:
an access module, configured to detect that the terminal accesses the cell of the master base station through a non-independent network configuration NSA, where the master base station adds the dual connectivity link to the terminal.
Optionally, the detection module includes:
and the third detection submodule is used for detecting that the terminal is switched to a target auxiliary base station and SCG Failure occurs at the side of the target auxiliary base station.
Optionally, the third detection submodule includes:
the first detection unit is used for detecting that the terminal keeps the connection with the main base station and switching the original auxiliary base station to a target auxiliary base station;
a second detecting unit, configured to detect that the terminal performs NSA handover, where the terminal is handed over from an original secondary base station to a target secondary base station;
or
And the third detection unit is used for detecting that the terminal is switched to the target auxiliary base station when the terminal is switched from the Long Term Evolution (LTE) network to the NSA.
In yet another aspect, an embodiment of the present invention further provides an electronic device, which includes a memory, a processor, and a computer program stored in the memory and executable on the processor, where the processor, when executing the computer program, implements the steps in the secondary cell group Failure SCG Failure processing method described above.
In still another aspect, an embodiment of the present invention further provides a readable storage medium, where the readable storage medium stores a computer program, and the computer program, when executed by a processor, implements the steps in the secondary cell group Failure SCG Failure processing method described above.
In the embodiment of the invention, when detecting that a terminal generates SCG Failure in an auxiliary base station and the terminal is not accessed to a cell of the auxiliary base station within continuous first preset time, adding the terminal into a forbidden list forbidden to be switched to double connection, and deleting an EN-DC link of the terminal; the terminal is forced to reside in the cell of the main base station, the terminal is limited to be switched to the cell of the auxiliary base station through double connection, the situation that an EN-DC link is frequently deleted and established between the main base station and the auxiliary base station is avoided, signaling overhead of a network side is reduced, and waste of wireless resources is avoided; meanwhile, the pressure of the UE side is reduced, and the electric quantity of the UE is saved.
Drawings
In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings needed to be used in the description of the embodiments of the present invention will be briefly introduced below, and it is obvious that the drawings in the following description are only some embodiments of the present invention, and it is obvious for those skilled in the art that other drawings can be obtained according to these drawings without inventive labor.
Fig. 1 is a flowchart illustrating steps of a method for processing an SCG Failure in a secondary cell group according to an embodiment of the present invention;
FIG. 2 is a flowchart of the steps of a first example of an embodiment of the present invention;
FIG. 3 is a flowchart of the steps of a second example of an embodiment of the present invention;
FIG. 4 is a flowchart of the steps of a third example of an embodiment of the present invention;
FIG. 5 is a flowchart of the steps of a fourth example of an embodiment of the present invention;
fig. 6 is a block diagram of a secondary cell group Failure SCG Failure processing apparatus according to an embodiment of the present invention;
fig. 7 is a block diagram of an electronic device according to an embodiment of the present invention.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are some, not all, embodiments of the present invention. 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 invention.
It should be appreciated that reference throughout this specification to "one embodiment" or "an embodiment" means that a particular feature, structure or characteristic described in connection with the embodiment is included in at least one embodiment of the present invention. Thus, the appearances of the phrases "in one embodiment" or "in an embodiment" in various places throughout this specification are not necessarily all referring to the same embodiment. Furthermore, the particular features, structures, or characteristics may be combined in any suitable manner in one or more embodiments.
In various embodiments of the present invention, it should be understood that the sequence numbers of the following processes do not mean the execution sequence, and the execution sequence of each process should be determined by its function and inherent logic, and should not constitute any limitation to the implementation process of the embodiments of the present invention.
In the embodiments provided herein, it should be understood that "B corresponding to A" means that B is associated with A from which B can be determined. It should also be understood that determining B from a does not mean determining B from a alone, but may be determined from a and/or other information.
Fig. 1 shows a flowchart of a secondary cell group Failure SCG Failure processing method according to an embodiment of the present invention.
As shown in fig. 1, an embodiment of the present invention provides a secondary cell group Failure SCG Failure processing method, which is applied to a Master base station (Master eNB, MeNB), where the base station is a device deployed in an access network to provide a wireless communication function for a terminal. The base stations may include various forms of macro base stations, micro base stations, relay stations, access points, and the like. In systems using different Radio access technologies, names of devices having a base station function may be different, for example, in a 5G New Radio (NR) system, called a nodeb or a gNB.
In The 5G NR system, in order to achieve a higher transmission rate and a lower transmission delay, a DUal Connectivity (DC) technique is introduced by The 3rd Generation Partnership Project (3 GPP). The DC technique means that a single User Equipment (UE) can establish communication links with two base stations respectively at the same time, and perform uplink and downlink communication through a dual communication link, thereby achieving higher-rate data transmission and lower time delay, and improving the performance of the wireless communication system. The dual communication link can better utilize radio resources compared to the single communication link. The main base station is connected with the terminal through a dual communication link; the terminal is in communication connection with the primary base station and the secondary base station SeNB simultaneously through the dual communication link, i.e. the terminal is in DC connection with the primary base station and the secondary base station. It can be understood that the primary base station may be a Long Term Evolution (LTE) base station, and the secondary base station is an NR base station; or, the main base station is an NR base station, and the auxiliary base station is an LTE base station.
The method comprises the following steps:
step 101, detecting that a terminal generates an SCG Failure in an auxiliary base station, and the terminal is not accessed to a cell of the auxiliary base station within a first preset time.
When the UE is in a double-connection state and the network between the UE and the secondary base station SN is disconnected, the UE generates SCG Failure; the reasons for SCG Failure may be as follows: (1) a downstream out-of-sync (T310 exception); (2) uplink out-of-step (Random Access protocol); (3) when the auxiliary node SgNB is added, the random access channel RACH of the NR side fails; (4) the Radio Link Control (RLC) reaches the maximum retransmission times (Rlc-Max Num Retx); (5) signaling resource bearing SRB3 complete Failure (Srb3-Integrity Failure); (6) NR radio resource control RRC reconfiguration Failure (Scg-reconfiguration Failure).
The UE firstly accesses the LTE network in an NSA network, after the UE reports a measurement report meeting the B1 event added by an EN-DC link, the main base station and the auxiliary base station can establish the EN-DC link, and then the UE can initiate a random access process at the auxiliary base station side. After the UE is in SCG Failure at the SN side, the main base station and the auxiliary base station delete the EN-DC link. At this time, if the UE reports the measurement report of the B1 event, the MN and the SN will perform the EN-DC link establishment again. If the signal of the SN side meets the threshold of reporting the B1 event by the UE, after the ENDC link is deleted, the UE can continuously report the measurement report of the B1 event, so that the network side can continuously delete the EN-DC link to the UE. Therefore, in the embodiment of the invention, the main base station monitors the UE after receiving the SCG Failure message of the UE for the first time; and if the terminal is not successfully accessed to the cell of the auxiliary base station within the continuous first preset time, executing a subsequent process.
And 102, adding the terminal into a forbidden list forbidden to be switched to double connection, and deleting a double connection link of the terminal.
In this step, the terminal (identification number) is added into a forbidden list, and the forbidden list prohibits the terminal from being switched to the cell of the auxiliary base station through double connection, so that the terminal is limited to reside in the cell of the main base station; and meanwhile, a double-connection link (EN-DC link) of the terminal is deleted, so that the main base station is prevented from continuously deleting the EN-DC link from the terminal. Frequent deletion of the EN-DC link has some impact on both the network side and the UE. On one hand, the network side continuously sends the deleting request and the executing process of the EN-DC link, increases the signaling overhead of the NSA system and influences other service scheduling; on the other hand, the UE continuously performs the random access process on the NR side, occupies a large amount of radio resources, and thus cannot perform other services, and increases power consumption of the UE.
In the embodiment of the invention, when detecting that a terminal generates SCG Failure in an auxiliary base station and the terminal is not accessed to a cell of the auxiliary base station within continuous first preset time, adding the terminal into a forbidden list forbidden to be switched to double connection, and deleting an EN-DC link of the terminal; the terminal is forced to reside in the cell of the main base station, the terminal is limited to be switched to the cell of the auxiliary base station through double connection, the situation that an EN-DC link is frequently deleted and established between the main base station and the auxiliary base station is avoided, signaling overhead of a network side is reduced, and waste of wireless resources is avoided; meanwhile, the pressure of the UE side is reduced, and the electric quantity of the UE is saved. The embodiment of the invention solves the problem that in the prior art, when the UE generates SCG Failure, the NSA system can continuously delete and build the EN-DC link.
Optionally, in this embodiment of the present invention, after the step of adding the terminal into a forbidden list for prohibiting switching to dual connectivity, the method further includes:
stopping responding to the B1 event after receiving the B1 event reported by the terminal; the B1 event carries the signal quality of the cell of the secondary base station measured by the terminal, and the signal quality is higher than a preset threshold.
The B1 event carries the signal quality of the cell of the secondary base station (the inter-system neighboring cell of the main base station cell where the UE currently resides) measured by the terminal, and the signal quality is higher than a preset threshold, that is, the B1 event is used to indicate that the quality of the inter-system neighboring cell is higher than a certain threshold, and when this condition is met, the UE reports the B1 event. And after the main base station adds the UE into the forbidden list and receives the B1 event reported by the terminal again, the main base station does not respond to the B1 event.
Optionally, in this embodiment of the present invention, the step of detecting that the terminal has SCG Failure at the secondary base station and the terminal has not yet accessed to the cell of the secondary base station within a first preset time includes:
detecting that the SCG Failure occurs in the auxiliary base station by the terminal, and starting a preset timer; the timing time of the timer is first preset time;
and detecting that the terminal is not accessed to the cell of the auxiliary base station after the timer is overtime.
After receiving a message that the UE generates the SCG Failure in the auxiliary base station, the main base station starts a preset timer for the UE, and the UE continues to try to intervene in a cell of the auxiliary base station within the timing time of the timer; and if the UE still does not access the cell of the auxiliary base station after the timer is overtime, the main base station adds the UE into the forbidden list.
The SCG Failure processing method provided by the embodiment of the present invention will be described below according to SCG failures in different application scenarios.
Scenario one, the UE initially accesses the scenario.
Optionally, in this embodiment of the present invention, before the step of detecting that the terminal generates the SCG Failure at the secondary base station, the method includes:
and detecting that the terminal accesses the cell of the main base station through the non-independent network NSA, wherein the main base station adds the double-connection link for the terminal.
If the terminal is initially accessed to the cell of the main base station, and the main base station adds an EN-DC link for the terminal; for example, if the LTE base station is a master base station, the UE first accesses the LTE base station, the LTE base station issues a B1 measurement event command to the UE through radio resource control Reconfiguration (RRC Reconfiguration), and after the UE reports a measurement report MR carrying a B1 event, the LTE base station initiates addition of an endec link and establishes dual-link with an NR side.
As a first example, referring to fig. 2, fig. 2 shows a main process of the SCG Failure processing method in a UE initial access scenario, including the following steps:
step 201, UE accesses LTE;
step 202, the LTE base station sends a B1 measurement event instruction to the UE;
step 203, the LTE base station receives a B1 event MR, and adds an EN-DC link to the UE;
step 204, the UE SCG Failure at the NR side (namely, the auxiliary base station side);
step 205, the LTE base station starts a timer T;
if step 206 is executed within the timing time of the timer, the UE accesses the NR (secondary base station) successfully;
if the access to the NR fails, step 207 is executed, the timer is over time, and the UE is listed in the forbidden list;
step 208, the UE resides in LTE;
step 209, the LTE base station releases the UE;
step 210, deleting the UE in the forbidden list by the LTE base station.
And a second scene, the secondary base station changes the scene.
Optionally, in this embodiment of the present invention, the step of detecting that the terminal generates the SCG Failure at the secondary base station includes:
and detecting that the terminal is switched to a target auxiliary base station, and generating SCG Failure at the side of the target auxiliary base station.
The UE is switched from the original auxiliary base station to the target auxiliary base station, SCG Failure is sent from the target auxiliary base station, and at the moment, the main base station monitors the process that the UE is accessed to the target auxiliary base station.
Specifically, the scenario of secondary base station change includes three situations, that is, the step of detecting that the terminal is switched to the target secondary base station includes:
the first condition is as follows: detecting that the terminal keeps the connection with the main base station, and switching the original auxiliary base station to a target auxiliary base station;
in case two, the terminal is detected to execute NSA switching, and the original auxiliary base station is switched to the target auxiliary base station;
or
And in case III, switching to the target auxiliary base station when the terminal is switched from the Long Term Evolution (LTE) network to the NSA.
In case one, the UE keeps the primary base station unchanged during the handover process, and only performs handover on the secondary base station.
As a second example, referring to fig. 3, fig. 3 shows a main process of the SCG Failure processing method in a scenario where a primary base station remains unchanged and only a secondary base station is switched, including the following steps:
step 301, the UE accesses LTE and NR1 (original secondary base station) in NSA 1;
step 302, the UE switches to NR2 (target secondary base station) in NSA 1;
step 303, the UE generates SCG Failure at the NR2 side (i.e. the secondary base station side);
step 304, the LTE base station starts a timer T;
within the timing time of the timer, if step 305 is executed, the UE successfully accesses the NR 2;
if the access to NR2 fails, go to step 306, the timer expires, and the UE is listed in the forbidden list;
step 307, the UE camps on LTE;
308, the LTE base station releases the UE;
step 309, the LTE base station deletes the UE in the forbidden list.
In case two, the UE performs handover on both the primary base station and the secondary base station during handover.
As a third example, referring to fig. 4, fig. 4 shows a main process of the SCG Failure processing method in a scenario where both the primary base station and the secondary base station perform handover access, including the following steps:
step 401, the UE accesses LTE1 and NR1 (original secondary base station) in NSA 1;
step 402, the UE switches to NR2 (target secondary base station) in NSA2(LTE2 and NR 2);
in step 403, the UE generates SCG Failure on the NR2 side (i.e. the secondary base station side);
step 404, the LTE2 base station starts a timer T;
within the timing time of the timer, if step 405 is executed, the UE accesses NR2 successfully;
if the access to NR2 fails, go to step 406, the timer expires, and the UE is listed in the forbidden list;
step 407, the UE camps on LTE 2;
step 408, the LTE2 base station releases the UE;
in step 409, the LTE2 base station deletes the UE in the forbidden list.
And in case three, the UE is switched to the target auxiliary base station when the LTE network is switched to the NSA.
As a fourth example, referring to fig. 5, fig. 5 shows a main process of the SCG Failure processing method in a scenario where the LTE network is switched to NSA, which includes the following steps:
step 501, UE accesses LTE;
step 502, the UE switches to NSA (LTE2 and NR 2);
step 503, the UE generates SCG Failure at the NR2 side (i.e. the secondary base station side);
step 504, the LTE2 base station starts a timer T;
within the timing time of the timer, if step 505 is executed, the UE successfully accesses the NR 2;
if the access to NR2 fails, go to step 506, the timer expires, and the UE is listed in the forbidden list;
step 507, the UE camps on LTE 2;
step 508, the LTE2 base station releases the UE;
in step 509, the LTE2 base station deletes the UE in the forbidden list.
In the embodiment of the invention, when detecting that a terminal generates SCG Failure in an auxiliary base station and the terminal is not accessed to a cell of the auxiliary base station within continuous first preset time, adding the terminal into a forbidden list forbidden to be switched to double connection, and deleting an EN-DC link of the terminal; the terminal is forced to reside in the cell of the main base station, the terminal is limited to be switched to the cell of the auxiliary base station through double connection, the situation that an EN-DC link is frequently deleted and established between the main base station and the auxiliary base station is avoided, signaling overhead of a network side is reduced, and waste of wireless resources is avoided; meanwhile, the pressure of the UE side is reduced, and the electric quantity of the UE is saved.
The method for processing the secondary cell group Failure SCG Failure according to the embodiment of the present invention is described above, and the apparatus for processing the secondary cell group Failure SCG Failure according to the embodiment of the present invention is described below with reference to the accompanying drawings.
Referring to fig. 6, an embodiment of the present invention further provides a secondary cell group Failure SCG Failure processing apparatus, which is applied to a primary base station, where the base station is an apparatus deployed in an access network to provide a wireless communication function for a terminal. The base stations may include various forms of macro base stations, micro base stations, relay stations, access points, and the like. In systems using different radio access technologies, the names of devices with base station functionality may differ, for example in a 5G NR system, called nodeb or gNB.
In The 5G NR system, in order to achieve a higher transmission rate and a lower transmission delay, a DUal Connectivity (DC) technique is introduced by The 3rd Generation Partnership Project (3 GPP). The DC technique means that a single User Equipment (UE) can establish communication links with two base stations respectively at the same time, and perform uplink and downlink communication through a dual communication link, thereby achieving higher-rate data transmission and lower time delay, and improving the performance of the wireless communication system. The dual communication link can better utilize radio resources compared to the single communication link. The main base station is connected with the terminal through a dual communication link; the terminal is communicatively connected to the primary base station and the secondary base station (SeNB) simultaneously via the dual communication link, i.e. the terminal is DC-connected to the primary base station and the secondary base station. It can be understood that the primary base station may be an LTE base station, and the secondary base station is an NR base station; or, the main base station is an NR base station, and the auxiliary base station is an LTE base station.
The device comprises:
the detecting module 601 is configured to detect that the terminal has SCG Failure at the secondary base station, and the terminal is not yet connected to the cell of the secondary base station within a first preset time.
When the UE is in a double-connection state and the network between the UE and the secondary base station SN is disconnected, the UE generates SCG Failure; the reasons for SCG Failure may be as follows: (1) a downstream out-of-sync (T310 exception); (2) uplink out-of-step (Random Access protocol); (3) when the auxiliary node SgNB is added, the random access channel RACH of the NR side fails; (4) the uplink radio link control layer protocol RLC reaches the maximum retransmission number (Rlc-Max Num Retx); (5) signaling resource bearing SRB3 complete Failure (Srb3-Integrity Failure); (6) NR radio resource control RRC reconfiguration Failure (Scg-reconfiguration Failure).
The UE firstly accesses the LTE network in an NSA network, after the UE reports a measurement report meeting the B1 event added by an EN-DC link, the main base station and the auxiliary base station can establish the EN-DC link, and then the UE can initiate a random access process at the auxiliary base station side. After the UE is in SCG Failure at the SN side, the main base station and the auxiliary base station delete the EN-DC link. At this time, if the UE reports the measurement report of the B1 event, the MN and the SN will perform the EN-DC link establishment again. If the signal of the SN side meets the threshold of reporting the B1 event by the UE, after the ENDC link is deleted, the UE can continuously report the measurement report of the B1 event, so that the network side can continuously delete the EN-DC link to the UE. Therefore, in the embodiment of the invention, the main base station monitors the UE after receiving the SCG Failure message of the UE for the first time; and if the terminal is not successfully accessed to the cell of the auxiliary base station within the continuous first preset time, executing a subsequent process.
A processing module 602, configured to add the terminal to a forbidden list forbidden to be switched to dual connectivity, and delete a dual connectivity link of the terminal.
Adding the terminal (identification number) into a forbidden list, wherein the forbidden list is used for forbidding the terminal to be switched to the cell of the auxiliary base station through double connection and limiting the terminal to reside in the cell of the main base station; and meanwhile, a double-connection link (EN-DC link) of the terminal is deleted, so that the main base station is prevented from continuously deleting the EN-DC link from the terminal. Frequent deletion of the EN-DC link has some impact on both the network side and the UE. On one hand, the network side continuously sends the deleting request and the executing process of the EN-DC link, increases the signaling overhead of the NSA system and influences other service scheduling; on the other hand, the UE continuously performs the random access process on the NR side, occupies a large amount of radio resources, and thus cannot perform other services, and increases power consumption of the UE.
Optionally, in an embodiment of the present invention, the apparatus further includes:
a response module, configured to stop responding to the B1 event after receiving the B1 event reported by the terminal; the B1 event carries the signal quality of the cell of the secondary base station measured by the terminal, and the signal quality is higher than a preset threshold.
Optionally, in this embodiment of the present invention, the detecting module 601 includes:
the first detection submodule is used for detecting that the terminal generates SCG Failure in the auxiliary base station and starting a preset timer; the timing time of the timer is first preset time;
and the second detection submodule is used for detecting that the terminal is not accessed to the cell of the auxiliary base station after the timer is overtime.
Optionally, in an embodiment of the present invention, the apparatus includes:
an access module, configured to detect that the terminal accesses the cell of the master base station through a non-independent network configuration NSA, where the master base station adds the dual connectivity link to the terminal.
Optionally, in this embodiment of the present invention, the detecting module 601 includes:
and the third detection submodule is used for detecting that the terminal is switched to a target auxiliary base station and SCG Failure occurs at the side of the target auxiliary base station.
Optionally, in this embodiment of the present invention, the third detection sub-module includes:
the first detection unit is used for detecting that the terminal keeps the connection with the main base station and switching the original auxiliary base station to a target auxiliary base station;
a second detecting unit, configured to detect that the terminal performs NSA handover, where the terminal is handed over from an original secondary base station to a target secondary base station;
or
And the third detection unit is used for detecting that the terminal is switched to the target auxiliary base station when the terminal is switched from the Long Term Evolution (LTE) network to the NSA.
The SCG Failure processing apparatus for an auxiliary cell group provided in the embodiment of the present invention can implement each process implemented by the master base station side in the method embodiments of fig. 1 to fig. 5, and is not described here again to avoid repetition.
In the embodiment of the present invention, when the detection module 601 detects that the terminal has SCG Failure at the secondary base station, and the terminal has not yet accessed the cell of the secondary base station within a continuous first preset time, the processing module 602 adds the terminal to a forbidden list for prohibiting switching to dual connectivity, and deletes the EN-DC link of the terminal; the terminal is forced to reside in the cell of the main base station, the terminal is limited to be switched to the cell of the auxiliary base station through double connection, the situation that an EN-DC link is frequently deleted and established between the main base station and the auxiliary base station is avoided, signaling overhead of a network side is reduced, and waste of wireless resources is avoided; meanwhile, the pressure of the UE side is reduced, and the electric quantity of the UE is saved. The embodiment of the invention solves the problem that in the prior art, when the UE generates SCG Failure, the NSA system can continuously delete and build the EN-DC link.
On the other hand, the embodiment of the present invention further provides an electronic device, which includes a memory, a processor, a bus, and a computer program that is stored in the memory and can be run on the processor, and when the processor executes the program, the steps in the secondary cell group Failure SCG Failure processing method are implemented.
For example, fig. 7 shows a schematic physical structure diagram of an electronic device.
As shown in fig. 7, the electronic device may include: a processor (processor)710, a communication Interface (Communications Interface)720, a memory (memory)730, and a communication bus 740, wherein the processor 710, the communication Interface 720, and the memory 730 communicate with each other via the communication bus 740. Processor 710 may call logic instructions in memory 730 to perform the following method:
detecting that a terminal generates SCG Failure in an auxiliary base station, and the terminal is not accessed to a cell of the auxiliary base station within continuous first preset time;
and adding the terminal into a forbidden list forbidden to be switched to double connection, and deleting a double connection link of the terminal.
In addition, the logic instructions in the memory 730 can be implemented in the form of software functional units and stored in a computer readable storage medium when the software functional units are sold or used as independent products. Based on such understanding, the technical solution of the present invention may be embodied in the form of a software product, which is stored in a storage medium and includes instructions for causing an electronic device (which may be a personal computer, a server, or a network device) to execute all or part of the steps of the method according to the embodiments of the present invention. And the aforementioned storage medium includes: a U-disk, a removable hard disk, a Read-Only Memory (ROM), a Random Access Memory (RAM), a magnetic disk or an optical disk, and other various media capable of storing program codes.
In another aspect, an embodiment of the present invention further provides a readable storage medium, on which a computer program is stored, where the computer program is implemented to, when executed by a processor, perform the secondary cell group Failure SCG Failure processing method provided in the foregoing embodiments, for example, including:
detecting that a terminal generates SCG Failure in an auxiliary base station, and the terminal is not accessed to a cell of the auxiliary base station within continuous first preset time;
and adding the terminal into a forbidden list forbidden to be switched to double connection, and deleting a double connection link of the terminal.
The above-described embodiments of the apparatus are merely illustrative, and the units described as separate parts may or may not be physically separate, and parts displayed as units may or may not be physical units, may be located in one place, or may be distributed on a plurality of network units. Some or all of the modules may be selected according to actual needs to achieve the purpose of the solution of the present embodiment. One of ordinary skill in the art can understand and implement it without inventive effort.
Through the above description of the embodiments, those skilled in the art will clearly understand that each embodiment can be implemented by software plus a necessary general hardware platform, and certainly can also be implemented by hardware. With this understanding, the above technical solutions may be embodied in the form of a software product, which may be stored in a readable storage medium, such as a ROM/RAM, a magnetic disk, an optical disk, etc., and includes instructions for causing an electronic device (which may be a personal computer, a server, or a network device, etc.) to execute the method according to the embodiments or some parts of the embodiments.
Finally, it should be noted that: the above examples are only intended to illustrate the technical solution of the present invention, but not to limit it; although the present invention has been described in detail with reference to the foregoing embodiments, it will be understood by those of ordinary skill in the art that: the technical solutions described in the foregoing embodiments may still be modified, or some technical features may be equivalently replaced; and such modifications or substitutions do not depart from the spirit and scope of the corresponding technical solutions of the embodiments of the present invention.

Claims (12)

1. A secondary cell group failure SCGFailure processing method is applied to a main base station and is characterized by comprising the following steps:
detecting that a terminal generates SCGFailure in an auxiliary base station, and the terminal is not accessed to a cell of the auxiliary base station within a first preset time;
adding the terminal into a forbidden list forbidden to be switched to double connection, and deleting a double connection link of the terminal;
stopping responding to the B1 event after receiving the B1 event reported by the terminal; the B1 event carries the signal quality of the cell of the secondary base station measured by the terminal, and the signal quality is higher than a preset threshold.
2. The method for processing SCGFailure in secondary cell group failure as claimed in claim 1, wherein the step of detecting that the terminal has SCGFailure at the secondary base station and the terminal has not accessed the cell of the secondary base station for a first preset time includes:
detecting that the terminal generates SCGFailure at the auxiliary base station, and starting a preset timer; the timing time of the timer is first preset time;
and detecting that the terminal is not accessed to the cell of the auxiliary base station after the timer is overtime.
3. The SCGFaid handling method for the secondary cell group failure of claim 1, wherein the step of detecting that the terminal generates the SCGFaid is preceded by the step of detecting that the terminal generates the SCGFaid, and the method comprises the following steps:
and detecting that the terminal accesses the cell of the main base station through the non-independent network NSA, wherein the main base station adds the double-connection link for the terminal.
4. The SCGFaid processing method for the secondary cell group failure, according to claim 1, wherein the step of detecting that the terminal has SCGFaid at the secondary base station includes:
and detecting that the terminal is switched to a target auxiliary base station, and generating SCGFailure at the side of the target auxiliary base station.
5. The SCGFailure processing method for the secondary cell group failure, as set forth in claim 4, wherein the step of detecting the terminal being handed over to the target secondary base station includes:
detecting that the terminal keeps the connection with the main base station, and switching the original auxiliary base station to a target auxiliary base station;
detecting that the terminal executes NSA switching, and switching from the original auxiliary base station to a target auxiliary base station;
or
And switching the terminal to a target auxiliary base station when the terminal is detected to be switched from the Long Term Evolution (LTE) network to the NSA.
6. A secondary cell group failure SCGFailure processing apparatus for use in a primary base station, the apparatus comprising:
the detection module is used for detecting that the terminal generates SCGFailure in the auxiliary base station, and the terminal is not accessed to the cell of the auxiliary base station within a first preset time;
the processing module is used for adding the terminal into a forbidden list forbidden to be switched to double connection and deleting a double connection link of the terminal;
a response module, configured to stop responding to the B1 event after receiving the B1 event reported by the terminal; the B1 event carries the signal quality of the cell of the secondary base station measured by the terminal, and the signal quality is higher than a preset threshold.
7. The secondary cell group failure SCGFailure processing apparatus of claim 6, wherein the detection module comprises:
the first detection submodule is used for detecting that the terminal generates SCGFailure in the auxiliary base station and starting a preset timer; the timing time of the timer is first preset time;
and the second detection submodule is used for detecting that the terminal is not accessed to the cell of the auxiliary base station after the timer is overtime.
8. The secondary cell group failure SCGFailure processing apparatus as claimed in claim 6, wherein the apparatus comprises:
an access module, configured to detect that the terminal accesses the cell of the master base station through a non-independent network configuration NSA, where the master base station adds the dual connectivity link to the terminal.
9. The secondary cell group failure SCGFailure processing apparatus of claim 6, wherein the detection module comprises:
and the third detection submodule is used for detecting that the terminal is switched to a target auxiliary base station and SCGFailure occurs at the side of the target auxiliary base station.
10. The secondary cell group failure SCGFailure processing apparatus of claim 9, wherein the third detection sub-module comprises:
the first detection unit is used for detecting that the terminal keeps the connection with the main base station and switching the original auxiliary base station to a target auxiliary base station;
a second detecting unit, configured to detect that the terminal performs NSA handover, where the terminal is handed over from an original secondary base station to a target secondary base station;
or
And the third detection unit is used for detecting that the terminal is switched to the target auxiliary base station when the terminal is switched from the Long Term Evolution (LTE) network to the NSA.
11. An electronic device comprising a processor, a memory and a computer program stored on and executable on the memory, characterized in that the computer program, when executed by the processor, implements the steps of the secondary cell group Failure SCG Failure handling method of any of claims 1 to 5.
12. A readable storage medium, on which a computer program is stored which, when being executed by a processor, carries out the steps of the secondary cell group Failure SCG Failure handling method according to any of claims 1 to 5.
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