CN114245484B - Processing method and device for RRC connection recovery, electronic equipment and storage medium - Google Patents

Processing method and device for RRC connection recovery, electronic equipment and storage medium Download PDF

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CN114245484B
CN114245484B CN202010942209.5A CN202010942209A CN114245484B CN 114245484 B CN114245484 B CN 114245484B CN 202010942209 A CN202010942209 A CN 202010942209A CN 114245484 B CN114245484 B CN 114245484B
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cell
rrc connection
connection recovery
target cell
source
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CN114245484A (en
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王鹏远
占亘熙
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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
    • H04W76/00—Connection management
    • H04W76/20—Manipulation of established connections
    • H04W76/27—Transitions between radio resource control [RRC] states
    • 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 invention provides a processing method and device for Radio Resource Control (RRC) connection recovery, electronic equipment and a storage medium, and relates to the technical field of communication. The method comprises the following steps: determining a target cell according to a cell reselection criterion; judging whether the RRC connection recovery success rate of the target cell is smaller than or equal to a preset threshold according to a preset field of the target cell; judging whether the target cell is a source cell or not according to a cell identifier under the condition that the RRC connection recovery success rate of the target cell is smaller than or equal to a preset threshold; and sending a first RRC connection recovery request to a source base station corresponding to the source cell under the condition that the target cell is the source cell or the signal intensity of the source cell is larger than a preset intensity threshold value. The invention can reduce the signaling overhead and the equipment power consumption of RRC connection recovery and improve the processing efficiency.

Description

Processing method and device for RRC connection recovery, electronic equipment and storage medium
Technical Field
The present invention relates to the field of communications technologies, and in particular, to a processing method and apparatus for RRC connection recovery, an electronic device, and a storage medium.
Background
In the fifth generation mobile communication system, in order to reduce the inter-system signaling interaction caused by mobility and meet the requirements of low power consumption and large connection, a radio resource control (RRC, radio Resource Control) state, namely, an RRC INACTIVE state (rrc_inactive state), is newly introduced. In the rrc_inactive state, the User terminal (UE) can be kept always CM-CONNECTED (cm_connected state) to the core network, and the radio access network (RAN, radio Access Network) side can save the context of the terminal and can quickly return to the RRC-CONNECTED state (rrc_connected state) if necessary. As the UE moves, when the signal quality of the currently camping cell cannot meet the communication service requirement of the UE, the UE needs to perform cell reselection, even across base stations, or across radio access network notification areas (RNA, RAN-Based Notification Area). When the UE performs cell reselection, a state transition procedure from rrc_inactive to rrc_connected needs to be initiated, i.e. RRC connection recovery (RRC Resume), but in some extreme cases, such as coverage areas being densely populated cell groups, when the UE performs RRC connection recovery (RRC Resume), a stuck state or even a recovery failure often occurs, which affects normal performance of the communication service of the UE.
In addition, as the coverage rate of network overlap of different base stations in the fifth Generation mobile communication technology (5 g, 5-Generation) is increased, in order to support multiple service scenarios, specific configuration among stations, such as configuring multiple RNAs for the same base station group, etc., and longer evolution (LTE, long Term Evolution) times are more, the scenario that the coverage area of the cross network frequently crosses RNAs or base stations to perform RRC connection recovery is also becoming common, so how to reduce the inter-station RRC connection recovery delay, reduce the probability of falling to RRC establishment (RRC Setup) or RRC reestablishment (RRC Reestablishment) in the RRC connection recovery process, and improve the success rate of RRC connection recovery becomes one of the problems worthy of research at present.
However, in the prior art, when performing RRC connection recovery processing, as described in 38.300 in the third generation partnership project (3GPP,3rdGeneration Partnership Project) technical specification (TS, technical Specification), under the cross coverage area of multiple base stations, if inter-station and inter-RNA cell reselection occurs during RRC Resume, a Path Switch (Path Switch) procedure between the RAN side and the core network of the base station is followed; in addition, frequent inter-station cell reselection leads to frequent data forwarding and path switching, multiple signaling interaction processes are needed, signaling overhead and equipment power consumption are indirectly increased, time delay of RRC connection recovery is increased, and processing efficiency is reduced.
Disclosure of Invention
The invention provides a processing method, a device, electronic equipment and a storage medium for Radio Resource Control (RRC) connection recovery, which are used for solving the problems of high signal overhead and equipment power consumption and low processing efficiency of the RRC connection recovery in the prior art.
According to a first aspect of the present invention, there is provided a radio resource control, RRC, connection recovery processing method, applied to a user equipment, UE, the method comprising:
determining a target cell according to a cell reselection criterion;
judging whether the RRC connection recovery success rate of the target cell is smaller than or equal to a preset threshold according to a preset field of the target cell, wherein the preset field is set by a target base station corresponding to the target cell according to the RRC connection recovery success rate of the target cell counted regularly;
judging whether the target cell is a source cell or not according to a cell identifier under the condition that the RRC connection recovery success rate of the target cell is smaller than or equal to a preset threshold;
and sending a first RRC connection recovery request to a source base station corresponding to the source cell under the condition that the target cell is the source cell or the signal intensity of the source cell is larger than a preset intensity threshold value.
According to a second aspect of the present invention, there is provided a radio resource control, RRC, connection recovery processing method, applied to a base station, the method comprising:
periodically counting the RRC connection recovery request success rate of the cell;
if the success rate of the RRC connection recovery request of the cell is smaller than or equal to a preset threshold, configuring a preset field for the cell;
and receiving a first RRC connection recovery request sent by the user terminal UE, wherein the first RRC connection recovery request is sent by the UE when the RRC connection recovery success rate of a target cell is smaller than or equal to a preset threshold and the signal intensity of the target cell is larger than a preset intensity threshold.
According to a third aspect of the present invention, there is provided a processing apparatus for radio resource control, RRC, connection recovery, applied to a user terminal, UE, the apparatus comprising:
the first target cell determining module is used for determining a target cell according to a cell reselection criterion;
the first recovery success rate judging module is used for judging whether the RRC connection recovery success rate of the target cell is smaller than or equal to a preset threshold according to a preset field of the target cell, wherein the preset field is set by a target base station corresponding to the target cell according to the RRC connection recovery success rate of the target cell counted periodically;
The cell judging module is used for judging whether the target cell is a source cell or not according to a cell identifier under the condition that the RRC connection recovery success rate of the target cell is smaller than or equal to a preset threshold;
and the first recovery request sending module is used for sending a first RRC connection recovery request to a source base station corresponding to the source cell under the condition that the target cell is the source cell or the signal intensity of the source cell is larger than a preset intensity threshold value.
According to a fourth aspect of the present invention, there is provided a processing apparatus for radio resource control, RRC, connection recovery, applied to a base station, the apparatus comprising:
the recovery success rate statistics module is used for periodically counting the RRC connection recovery request success rate of the cell;
a field configuration module, configured to configure a preset field for the cell if the RRC connection recovery request success rate of the cell is less than or equal to a preset threshold;
the first recovery request receiving module is configured to receive a first RRC connection recovery request sent by a user equipment UE, where the first RRC connection recovery request is sent by the UE when an RRC connection recovery success rate of a target cell is less than or equal to a preset threshold, and the target cell is a source cell or a signal strength of the source cell is greater than a preset strength threshold.
According to a fifth aspect of the present invention, there is provided an electronic device comprising:
a processor, a memory and a computer program stored on the memory and executable on the processor, the processor implementing the aforementioned method when executing the program.
According to a sixth aspect of the invention, there is provided a readable storage medium, which when executed by a processor of an electronic device, enables the electronic device to perform the aforementioned method.
The invention provides a processing method, a device, electronic equipment and a storage medium for Radio Resource Control (RRC) connection recovery, wherein the method comprises the following steps: determining a target cell according to a cell reselection criterion; judging whether the RRC connection recovery success rate of the target cell is smaller than or equal to a preset threshold according to a preset field of the target cell; judging whether the target cell is a source cell or not according to a cell identifier under the condition that the RRC connection recovery success rate of the target cell is smaller than or equal to a preset threshold; and sending a first RRC connection recovery request to a source base station corresponding to the source cell under the condition that the target cell is the source cell or the signal intensity of the source cell is larger than a preset intensity threshold value. The invention can control the UE to carry out RRC connection recovery in the source cell under the condition that the RRC connection recovery success rate of the target cell is smaller than or equal to the preset threshold, thereby reducing the signaling overhead and the equipment power consumption of the RRC connection recovery and improving the processing efficiency.
The foregoing description is only an overview of the present invention, and is intended to be implemented in accordance with the teachings of the present invention in order that the same may be more clearly understood and to make the same and other objects, features and advantages of the present invention more readily apparent.
Drawings
In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings that are needed in the description of the embodiments of the present invention will be briefly described below, it being obvious that the drawings in the following description are only some embodiments of the present invention, and that other drawings may be obtained according to these drawings without inventive effort for a person skilled in the art.
Fig. 1 is a flowchart illustrating steps of a processing method for RRC connection recovery according to a first embodiment of the present invention;
fig. 2 is a flowchart of specific steps of a processing method for radio resource control RRC connection recovery according to a second embodiment of the present invention;
fig. 3 is a flowchart illustrating specific steps of a processing method for radio resource control RRC connection recovery according to a third embodiment of the present invention;
fig. 4 is a flowchart of specific steps of a processing method for radio resource control RRC connection recovery according to a fourth embodiment of the present invention;
Fig. 5 is a flowchart for recovering RRC connection between stations according to a fourth embodiment of the present invention;
fig. 6 is a flowchart of RRC connection recovery across RNAs provided in accordance with a fourth embodiment of the present invention;
fig. 7 is a block diagram of a processing apparatus for radio resource control RRC connection recovery according to a fifth embodiment of the present invention;
fig. 8 is a block diagram of a processing apparatus for radio resource control RRC connection recovery according to a sixth embodiment of the present invention;
fig. 9 is a block diagram of a processing apparatus for radio resource control RRC connection recovery according to a seventh embodiment of the present invention;
fig. 10 is a block diagram of a processing apparatus for radio resource control RRC connection recovery according to an eighth embodiment of the present invention;
fig. 11 is a schematic structural diagram of an electronic device provided by the present invention.
Detailed Description
The following description of the embodiments of the present invention will be made clearly and fully with reference to the accompanying drawings, in which it is evident that the embodiments described are some, but not all embodiments of the invention. All other embodiments, which can be made by those skilled in the art based on the embodiments of the invention without making any inventive effort, are intended to be within the scope of the invention.
Example 1
Referring to fig. 1, a flowchart of specific steps of a processing method for radio resource control RRC connection recovery applied to a user equipment UE according to an embodiment of the present invention is shown.
And step 101, determining a target cell according to the cell reselection criteria.
The invention provides a processing method for RRC connection recovery, which is used for reducing signaling overhead and equipment power consumption in the process of recovering a UE from an RRC INACTIVE state (RRC_INACTIVE state) to an RRC connection state (RRC_CONNECTED state) and improving the processing efficiency of RRC connection recovery. Thus, in the present invention, the UE is in rrc_inactive state. When the UE is in rrc_inactive state, the connection of radio resources is already disconnected with the previous serving cell, that is, the source cell in the present invention, and the connection is not yet established with the next serving cell, that is, the target cell in the present invention, and the UE needs to determine the next camping cell through cell reselection and perform RRC connection recovery in the selected camping cell.
And the UE determines a target cell in the neighbor cell of the source cell according to the cell reselection criteria. The neighbor cell includes a source cell, an intra-station neighbor cell belonging to the same base station as the source cell, an inter-station neighbor cell belonging to a different base station from the source cell, and a neighbor cell crossing a different radio access network notification area (RNA, RAN-Based Notification Area) from the source cell.
Step 102, according to the preset field of the target cell, judging whether the RRC connection recovery success rate of the target cell is less than or equal to a preset threshold.
The preset field is set by a target base station corresponding to the target cell according to the RRC connection recovery success rate of the target cell counted periodically.
The base station periodically counts the RRC connection recovery success rate of the cell, and configures a preset field of the cell when the RRC connection recovery success rate of the cell is less than or equal to a preset threshold.
Optionally, if the RRC connection recovery success rate of the cell is less than or equal to a preset threshold, the base station sets a preset field of the cell as a preset identifier; if the preset field of the cell contains a preset identifier, determining that the RRC connection recovery success rate of the cell is smaller than or equal to a preset threshold.
In practical application, an newly-added enumeration type field isresubmectsratio of a non-critical extension (non-critical extension) field in a system message block (SIB 1, system Information Block 1) may be used as a preset field, when the RRC connection recovery success rate of a cell is less than or equal to a preset threshold, the base station configures the isresubmectsratio low to true, and sends the configured field to the core network, the core network updates the system message according to the configuration of the base station, and when the UE performs RRC connection recovery, the RRC connection recovery success rate of the target cell is obtained by reading and analyzing SIB1 in the system message.
And step 103, judging whether the target cell is a source cell according to the cell identifier under the condition that the RRC connection recovery success rate of the target cell is smaller than or equal to a preset threshold.
The cell identifier is a unique identity of the cell, and specifically may be a physical cell identifier (PCI, physicalCellID).
Judging whether the target cell and the source cell are the same cell or not according to the first cell identifier of the target cell and the second cell identifier of the source cell; if the first cell identifier is consistent with the second cell identifier, the target cell is determined to be the source cell.
In combination with the foregoing, the UE may determine, through a preset field of the target cell, whether the RRC connection recovery success rate of the target cell is less than or equal to a preset threshold. When the RRC connection recovery success rate of the target cell is less than or equal to a preset threshold, it is indicated that if the UE continues to perform RRC connection recovery in the target cell, the recovery will fail with a high probability, and if the target cell is not the source cell, before performing RRC connection recovery, the UE needs to be switched from the source cell to the target cell, even needs to cross base stations and cross RNAs, if RRC connection recovery fails after the UE is switched to the target cell, cell reselection needs to be performed, and the target cell is reselected and RRC connection recovery is performed until the recovery is successful, which definitely causes frequent data transmission and path switching, increases signaling overhead and equipment power consumption, and increases the delay of RRC connection recovery.
Therefore, in the embodiment of the invention, when the RRC connection recovery success rate of the target cell is less than or equal to the preset threshold, it is first determined whether the target cell is the source cell, if the target cell is just the source cell, RRC connection recovery can be continuously performed in the source cell, and since the context request data of the UE required for RRC connection recovery is stored in the source cell, and the source cell is continuously used as the resident cell, cell switching is not required, so that frequent signaling interaction and data transmission processes do not exist, and even if recovery fails, too much influence is not caused on recovery delay, signaling overhead and equipment power consumption.
Step 104, when the target cell is the source cell or the signal strength of the source cell is greater than a preset strength threshold, a first RRC connection recovery request is sent to a source base station corresponding to the source cell.
Wherein the signal strength of the source cell includes a reference signal received power (RSRP, reference Signal Receiving Power) of the source cell measured by the UE.
In combination with the foregoing, when the RRC connection recovery success rate of the target cell is less than or equal to the preset threshold, if the target cell is exactly the source cell, even if recovery fails, the recovery delay, signaling overhead and device power consumption will not be greatly affected, so that RRC connection recovery can be performed in the source cell.
Or if the signal strength of the source cell is greater than the preset strength threshold, the current signal quality of the source cell is better, and the probability of success of the RRC connection recovery in the source cell is still relatively greater at the moment, so that the UE can perform the RRC connection recovery in the source cell if the signal strength of the source cell is greater than the preset threshold when the RRC connection recovery success rate of the target cell is less than or equal to the preset threshold.
That is, when the target cell is the source cell, or when the signal strength of the source cell is greater than a preset strength threshold, the UE may perform RRC connection recovery in the source cell, and therefore, in both cases, the UE sends a first RRC connection recovery request to the source base station corresponding to the source cell, so as to initiate an RRC connection recovery procedure in the source cell.
In summary, after the UE determines the target cell, the embodiment of the present invention determines the RRC connection recovery success rate of the target cell in advance, and when the target cell is the source cell or the signal strength of the source cell is greater than the preset strength threshold under the condition that the RRC connection recovery success rate of the target cell is less than or equal to the preset threshold, controls the UE to perform RRC connection recovery in the source cell, thereby reducing signaling overhead and equipment power consumption of RRC connection recovery and improving processing efficiency.
Example two
Referring to fig. 2, a flowchart of specific steps of a processing method for radio resource control RRC connection recovery applied to a user equipment UE according to a second embodiment of the present invention is shown.
Step 201, determining a target cell according to a cell reselection criterion.
And the UE determines a target cell in the neighbor cell of the source cell according to the cell reselection criteria. The neighbor cell includes a source cell, and the neighbor cell may be an intra-station neighbor cell belonging to the same base station, an inter-station neighbor cell belonging to different base stations, or a neighbor cell crossing different radio access network notification areas (RNA, RAN-Based NotificationArea).
Optionally, the step of determining the target cell according to the cell reselection criteria includes:
acquiring a first carrier frequency and a first carrier frequency priority of the source cell, and a second carrier frequency priority of a neighboring cell; if the first carrier frequency is equal to the second carrier frequency or the first carrier frequency priority is equal to the second carrier frequency priority, calculating the first signal strength of the source cell and the second signal strength of the neighbor cell; and if the first signal strength is smaller than the second signal strength, determining that the neighbor cell is a target cell meeting a cell reselection criterion.
In practical application, rs can be measured by UE in cell reselection process by using RSRP value Q of source cell as Rs as first signal strength of source cell and Rn as second signal strength of neighbor cell means,s Hysteresis Q of source cell hyst Reception level offset Q of minimum reference signal reception quality (RSRQ, referenceSignalReceivingQuality) required for UE during cell reselection offsettemp The Rn can be represented by the Reference Signal Received Power (RSRP) value (Q) of the neighbor cell measured by the UE in the process of cell reselection means,n Cell offset Q of neighbor cell offset Reception level offset Q of minimum Reference Signal Received Quality (RSRQ) required for UE during cell reselection offsettemp Representation, in particular:
Rs＝Q means,s +Q hyst -Q offsettemp (1)
Rn＝Q means,n -Q offset -Q offsettemp (2)
when the first carrier frequency of the source cell is equal to the second carrier frequency of the adjacent cell or the first carrier frequency priority of the source cell is equal to the second carrier frequency priority of the adjacent cell, if Rs < Rn is satisfied, the adjacent cell is determined to be a target cell which satisfies the cell reselection criterion.
Optionally, if the first carrier frequency priority is greater than the second carrier frequency priority, determining whether the residence time of the UE in the source cell exceeds a preset time; if the residence time of the UE in the source cell exceeds the preset time, determining a first receiving level and a first receiving signal quality of the source cell, and a second receiving level and a second receiving signal quality of the adjacent cell; if the first receiving level is smaller than a first low-frequency reselection threshold and the second receiving level is larger than a second low-frequency reselection threshold, determining the neighbor cell as a target cell meeting a cell reselection criterion; or if the first received signal quality is smaller than a third low frequency reselection threshold and the second received signal quality is larger than a fourth low frequency reselection threshold, determining the neighbor cell as a target cell meeting a cell reselection criterion.
Suppose S rxlev,s For the first reception level of the source cell, S qual,s For the first received signal quality of the source cell, S rxlev,n Is the second receiving level of the adjacent cell, S qual,n Thresh, the second received signal quality for the neighbor cell Serving,LowP Thresh is the first low frequency reselection threshold X,LowP Thresh is the second low frequency reselection threshold Serving,LowQ Thresh is the third low frequency reselection threshold X,LowQ Is the fourth low frequency reselection threshold.
The reception level of a cell can be expressed as:
S rxlev ＝Q rxlevmeas -(Q rxlevmin +Q rxlevminoffset )-P compensation -Q offsettemp (3)
wherein Q is rxlevmeas The value of the cell reception level measured for the UE is generally represented by the RSRP value of the cell measured for the UE, Q rxlevmin Minimum number reception level required for cell, configured by base station, indicated to UE in SIB1, Q rxlevminoffset Is relative to Q rxlevmin Is configured by the base station, indicated to the UE in SIB1, P compensation When the UE accesses the cell, the difference value between the maximum transmitting power set by the system and the maximum output power determined according to the terminal grade, Q offsettemp Reception level offset for minimum Reference Signal Received Quality (RSRQ) required by the UE during cell reselection.
And (3) replacing each parameter value in the formula (3) with the parameter value corresponding to the source cell and the adjacent cell respectively to obtain a first receiving level of the source cell and a second receiving level of the adjacent cell.
The received signal quality of a cell can be expressed as:
S qual ＝Q qualmeas -(Q qualmin +Q qualminoffset )-Q offsettemp (4)
Wherein Q is qualmeas The received signal quality for a cell measured by a UE is generally represented by the RSRQ value of the cell measured by the UE, Q qualmin Minimum received signal quality required for a cell, configured by the base station, indicated to the UE in SIB1, Q qualminoffset Is relative to Q qualmin Is configured by the base station, indicated to the UE in SIB1, Q offsettemp Reception level offset for minimum Reference Signal Received Quality (RSRQ) required by the UE during cell reselection.
And (3) replacing each parameter value in the formula (3) with the parameter value corresponding to the source cell and the adjacent cell respectively to obtain the first received signal quality of the source cell and the second received signal quality of the adjacent cell.
Optionally, if the first carrier frequency priority is smaller than the second carrier frequency priority, judging whether the residence time of the UE in the source cell exceeds a preset time; if the residence time of the UE in the source cell exceeds the preset time, determining a second receiving level and second receiving signal quality of the adjacent cell; if the second receiving level is larger than a first high-frequency reselection threshold, determining the neighbor cell as a target cell meeting a cell reselection criterion; or if the second received signal quality is greater than a second high frequency reselection threshold, determining the neighbor cell as a target cell meeting a cell reselection criterion.
Specifically, the second reception level and the second reception signal quality of the neighbor cell may be calculated using the above equation (3) and equation (4), respectively.
Step 202, according to the preset field of the target cell, judging whether the RRC connection recovery success rate of the target cell is less than or equal to a preset threshold.
The preset field is set by a target base station corresponding to the target cell according to the RRC connection recovery success rate of the target cell counted periodically.
This step may refer to step 102, which is not described herein.
And step 203, judging whether the target cell is a source cell according to the cell identifier under the condition that the RRC connection recovery success rate of the target cell is smaller than or equal to a preset threshold.
This step may refer to step 103, and will not be described herein.
Optionally, reading a first cell identifier of the target cell from a system message; comparing the first cell identifier with a stored second cell identifier of the source cell; if the first cell identifier is consistent with the second cell identifier, determining that the target cell is the source cell; and if the first cell identifier is inconsistent with the second cell identifier, determining that the target cell is not the source cell.
Step 204, when the target cell is the source cell or the signal strength of the source cell is greater than a preset strength threshold, a first RRC connection recovery request is sent to a source base station corresponding to the source cell.
The signal strength of the source cell includes reference signal received power RSRP of the source cell measured by the UE.
This step may refer to step 104, which is not described herein.
Step 205, if the target cell is not the source cell and the signal strength of the source cell is less than or equal to a preset strength threshold, re-determining the target cell according to the cell reselection criterion.
In view of the foregoing, at this time, the RRC connection recovery success rate of the target cell is less than or equal to the preset threshold, that is, if the UE performs RRC connection recovery in the target cell, the UE is likely to fail recovery. In this case, if the target cell is not the source cell, if RRC connection recovery is selected in the target cell, the UE needs to switch from the source cell to the target cell, even cross base stations and cross RNAs, if RRC connection recovery fails after the UE switches to the target cell, cell reselection is further needed, the target cell is reselected and RRC connection recovery is performed until recovery is successful, which definitely leads to frequent data transmission and path switching, increases signaling overhead and equipment power consumption, and increases delay of RRC connection recovery. Also, since the signal strength of the source cell is less than or equal to the preset strength threshold, that is, the UE is likely to fail to recover the RRC connection in the source cell, it is also not suitable to continue to camp on the source cell. Therefore, in the case that the target cell is not the source cell and the signal strength of the source cell is less than or equal to a preset strength threshold, the UE needs to re-determine the target cell according to the cell reselection criteria, and then re-perform step 202.
Step 206, sending a second RRC connection recovery request to the target base station corresponding to the target cell, where the RRC connection recovery success rate of the target cell is greater than a preset threshold.
When the RRC connection recovery success rate of the target cell is greater than a preset threshold, the UE performs RRC connection recovery on the target cell, so that the probability of successful recovery is high, the situation of frequent cell reselection is generally avoided, frequent data transmission and path switching are avoided, the recovery time delay, signaling overhead and equipment power consumption are not greatly influenced, and the RRC connection recovery can be performed on the target cell. And the UE starts an RRC connection recovery flow in the target cell by sending a second RRC connection recovery request to the target base station corresponding to the target cell.
In summary, after the UE determines the target cell, the embodiment of the present invention determines the RRC connection recovery success rate of the target cell in advance, and when the target cell is the source cell or the signal strength of the source cell is greater than the preset strength threshold under the condition that the RRC connection recovery success rate of the target cell is less than or equal to the preset threshold, controls the UE to perform RRC connection recovery in the source cell, thereby reducing signaling overhead and equipment power consumption of RRC connection recovery and improving processing efficiency.
Example III
Referring to fig. 3, a flowchart of specific steps of a processing method for radio resource control RRC connection recovery applied to a base station according to a third embodiment of the present invention is shown.
Step 301, periodically counting the RRC connection recovery request success rate of the cell.
The base station may periodically count the RRC connection recovery success rate of the cell, specifically, may count the total number of times that all UEs of the cell perform RRC connection recovery in a preset time, and the number of times that the cell actually recovers successfully, so as to determine the RRC connection recovery success rate of the cell in the preset time.
For example, the preset time is 60 minutes and the preset threshold PSuc is 50%. Counting the total number of times that all the UEs in the cell try to recover the RRC connection is 100 times within 60 minutes, wherein the failure is 50 times, namely the actual success rate of the RRC_INACTIVE to RRC_CONNECTED state conversion of all the UEs in the cell within 60 minutes is less than or equal to PSuc, and judging that the cell is the cell with low probability of success of the RRC connection recovery; in contrast, if the number of failures of the rrc_inactive to rrc_connected state transition occurs within 60 minutes is less than 50, the actual success rate is greater than PSuc, it is determined that the cell is not a cell with a low probability of success in RRC connection recovery.
Step 302, if the RRC connection recovery request success rate of the cell is less than or equal to a preset threshold, configuring a preset field for the cell.
Optionally, if the RRC connection recovery success rate of the cell is less than or equal to a preset threshold, the base station sets a preset field of the cell as a preset identifier; if the preset field of the cell contains a preset identifier, determining that the RRC connection recovery success rate of the cell is smaller than or equal to a preset threshold.
In practical application, an newly-added enumeration type field isresubmescriptionLow of a non-critical extension (non-critical extension) field in the SIB1 can be used as a preset field, when the RRC connection recovery success rate of a cell is smaller than or equal to a preset threshold, the base station configures the isresubmescriptionLow as true, the configured field is sent to a core network, the core network updates a system message according to the configuration of the base station, and when the UE performs RRC connection recovery, the RRC connection recovery success rate of a target cell is obtained by reading and analyzing the SIB1 in the system message.
Step 303, receiving a first RRC connection restoration request sent by the user terminal UE.
The first RRC connection recovery request is sent by the UE when an RRC connection recovery success rate of a target cell is less than or equal to a preset threshold, and the target cell is a source cell or a signal strength of the source cell is greater than a preset strength threshold.
When the RRC connection recovery success rate of the target cell is less than or equal to a preset threshold, it is indicated that if the UE continues to perform RRC connection recovery in the target cell, the recovery will fail with a high probability, and if the target cell is not the source cell, before performing RRC connection recovery, the UE needs to be switched from the source cell to the target cell, even needs to cross base stations and cross RNAs, if RRC connection recovery fails after the UE is switched to the target cell, cell reselection needs to be performed, and the target cell is reselected and RRC connection recovery is performed until the recovery is successful, which definitely causes frequent data transmission and path switching, increases signaling overhead and equipment power consumption, and increases the delay of RRC connection recovery.
Therefore, in the embodiment of the invention, when the RRC connection recovery success rate of the target cell is less than or equal to the preset threshold, it is first determined whether the target cell is the source cell, if the target cell is just the source cell, RRC connection recovery can be continuously performed in the source cell, and since the context request data of the UE required for RRC connection recovery is stored in the source cell, and the source cell is continuously used as the resident cell, cell switching is not required, so that frequent signaling interaction and data transmission processes do not exist, and even if recovery fails, too much influence is not caused on recovery delay, signaling overhead and equipment power consumption.
Or if the signal strength of the source cell is greater than the preset strength threshold, the current signal quality of the source cell is better, and the probability of success of the RRC connection recovery in the source cell is still relatively greater at the moment, so that the UE can perform the RRC connection recovery in the source cell if the signal strength of the source cell is greater than the preset threshold when the RRC connection recovery success rate of the target cell is less than or equal to the preset threshold.
That is, in the embodiment of the present invention, when the target cell is the source cell, or when the signal strength of the source cell is greater than the preset strength threshold, the UE may perform RRC connection recovery in the source cell, so that in both cases, the UE may send a first RRC connection recovery request to the source base station corresponding to the source cell, and after the base station receives the first RRC connection recovery request sent by the UE, control the UE to perform RRC connection recovery in the source cell according to the stored context data of the UE.
Optionally, the signal strength of the source cell includes a reference signal received power RSRP of the source cell measured by the UE.
In summary, in the embodiment of the present invention, the base station counts the RRC connection recovery success rate of the cell through timing, and configures a preset field for the cell when the RRC connection recovery request success rate of the cell is less than or equal to a preset threshold, so that when the UE selects a resident cell performing RRC connection recovery, the UE obtains the RRC connection recovery success rate of the target cell by reading the preset field, so as to determine a suitable recovery policy according to the RRC connection recovery success rate of the target cell, and when the RRC connection recovery success rate of the target cell is less than or equal to the preset threshold, and the signal strength of the target cell is the source cell or the source cell is greater than the preset strength threshold, the base station receives the first RRC connection recovery request sent by the UE, thereby controlling the UE to perform RRC connection recovery in the source cell, reducing signaling overhead and equipment power consumption of RRC connection recovery, and improving processing efficiency.
Example IV
Referring to fig. 4, a flowchart of specific steps of a processing method for radio resource control RRC connection recovery applied to a base station according to a fourth embodiment of the present invention is shown.
Step 401, periodically counting the RRC connection recovery request success rate of the cell.
This step may refer to step 301, and will not be described herein.
Step 402, if the RRC connection recovery request success rate of the cell is less than or equal to a preset threshold, configuring a preset field for the cell.
This step may refer to step 302, and will not be described herein.
Step 403, receiving a first RRC connection restoration request sent by the user terminal UE.
The first RRC connection recovery request is sent by the UE when an RRC connection recovery success rate of a target cell is less than or equal to a preset threshold, and the target cell is a source cell or a signal strength of the source cell is greater than a preset strength threshold.
This step may refer to step 303, and will not be described herein.
Optionally, the signal strength of the source cell includes a reference signal received power RSRP of the source cell measured by the UE.
And step 404, controlling the UE to perform RRC connection recovery in the source cell according to the stored context request data of the UE.
In the embodiment of the present invention, when the target cell is the source cell or the signal strength of the source cell is greater than the preset strength threshold, the UE performs RRC connection recovery in the source cell, so that the UE may send a first RRC connection recovery request to the source base station corresponding to the source cell in both cases. That is, if the base station receives the first RRC connection restoration request, it may be determined that the base station is a source base station, and context request data of the UE is stored in the source base station, so that the UE may be controlled to perform RRC connection restoration in the source cell directly according to the stored context request data.
Optionally, the first RRC connection restoration request carries a UE identifier allocated to the UE by the source base station; analyzing the identity information of the source base station according to the UE identification; judging whether the base station receiving the RRC connection recovery request is a source base station or not according to the identity information; and if the base station is a source base station, controlling the UE to perform RRC connection recovery in a source cell according to the stored context request data of the UE.
Step 405, receiving a second RRC connection restoration request sent by the UE.
And the second RRC connection recovery request is sent by the UE under the condition that the RRC connection recovery success rate of the target cell is greater than a preset threshold.
When the RRC connection recovery success rate of the target cell is greater than a preset threshold, the UE performs RRC connection recovery on the target cell, so that the probability of successful recovery is high, the situation of frequent cell reselection is generally avoided, frequent data transmission and path switching are avoided, the recovery time delay, signaling overhead and equipment power consumption are not greatly influenced, and the RRC connection recovery can be performed on the target cell.
In the embodiment of the invention, when the RRC connection recovery success rate of the target cell is greater than a preset threshold, the UE sends a second RRC connection recovery request to the target base station corresponding to the target cell, and after the base station receives the second RRC connection recovery request sent by the UE, the base station starts processing related to RRC connection recovery, for example, acquires context request data of the UE from the source base station, and controls the UE to perform RRC connection recovery in the target cell according to the acquired context request data.
Step 406, the second RRC connection restoration request carries a UE identifier allocated to the UE by the source base station, and determines whether the base station is the source base station according to the UE identifier.
Optionally, analyzing the identity information of the source base station according to the UE identity; and judging whether the target base station is the source base station according to the identity information.
In the embodiment of the invention, when the UE determines the target cell according to the cell reselection criteria, the target cell is determined in the neighbor cells of the source cell, and the neighbor cells comprise the source cell, an intra-station neighbor cell belonging to the same base station as the source cell, an inter-station neighbor cell belonging to a different base station from the source cell, and a neighbor cell crossing different radio access network notification areas (RNA, RAN-Based Notification Area) from the source cell. Therefore, the target cell and the source cell in the embodiment of the present invention may belong to different base stations.
When the base station receives the RRC connection recovery request sent by the UE, the identity information of the source base station needs to be analyzed according to the UE identification carried in the RRC connection recovery request, and then whether the base station receiving the RRC connection recovery request is the source base station is judged according to the identity information.
Step 407, if the base station is not the source base station, determining whether the current RRC connection recovery success rate of the target cell is less than or equal to a preset threshold.
Because the signal quality of the cell continuously changes along with the change of the resource load, when the base station receiving the RRC connection request sent by the UE is not the source base station, if the UE performs RRC connection recovery on the target cell, processes such as inter-station cell switching and inter-station signaling transmission need to be performed, and if the current RRC connection recovery success rate of the target cell is greater than or equal to a preset threshold after the UE is switched to the target cell, the RRC connection recovery failure is likely to be caused, and then the UE needs to reselect the resident cell to perform RRC connection recovery, which leads to frequent data transmission and path switching, increases signaling overhead and equipment power consumption, and increases the time delay of RRC connection recovery.
Therefore, in the embodiment of the invention, after receiving the RRC connection request sent by the UE, the base station further determines, in the case that the base station is not the source base station, whether the current RRC connection recovery success rate of the target cell is less than or equal to a preset threshold, so as to avoid that the RRC connection recovery success rate of the target cell changes to affect the RRC connection recovery result.
Step 408, if the current RRC connection recovery success rate of the target cell is less than or equal to the preset threshold, an RRC release message is sent to the UE.
The RRC release message comprises a redirection carrier signal of the source cell, so that the UE performs RRC connection recovery in the source cell according to the redirection carrier signal.
In combination with the foregoing, since the base station that receives the RRC connection restoration request is not the source base station, if the current RRC connection restoration success rate of the target cell is less than or equal to the preset threshold, if the UE continues to perform RRC connection restoration in the target cell, it is highly likely that restoration fails, frequent data transmission and path switching, signaling overhead and device power consumption are increased, and at the same time, delay of RRC connection restoration is also increased.
And 409, if the current RRC connection recovery success rate of the target cell is greater than a preset threshold, querying the source base station in a preset neighbor base station table according to the UE identifier.
And step 410, sending a UE context request message to the source base station.
Step 411, receiving context request data of the UE provided by the source base station.
And step 412, controlling the UE to perform RRC connection recovery in the target cell according to the context request data.
If the current RRC connection recovery success rate of the target cell is greater than the preset threshold, the UE performs RRC connection recovery on the target cell, so that the situation of frequent cell reselection generally does not occur, frequent data transmission and path switching are avoided, the recovery time delay, the signaling overhead and the equipment power consumption are not greatly influenced, and the RRC connection recovery can be performed on the target cell.
Because the base station receiving the RRC request is not the source base station, it is necessary to start an inter-station RRC connection recovery procedure, and the base station needs to request context request data of the UE from the source base station, and then control the UE to perform RRC connection recovery in the target cell according to the acquired context request data.
Referring to fig. 5, an inter-station RRC connection recovery flowchart of an embodiment of the present invention is shown. After determining the target cell according to the foregoing steps, the UE sends an RRC connection recovery request RRC Resum eRequest to the target base station corresponding to the target cell (i.e., the base station gNB in fig. 5), and starts an inter-station RRC recovery procedure. When the UE sends an RRC connection restoration request RRC Resume Request, in an rrc_inactive state and a CM-CONNECTED state, after receiving RRC Resume Request sent by the UE, the gNB sends a UE context request message RETRIEVE UE CONTEXT REQUEST to the source base station (i.e., last Serving gNB), and requests the source base station (Last Serving gNB) to provide context request data of the UE; after the Last Serving gNB receives RETRIEVE UE CONTEXT REQUEST, RETRIEVE UE CONTEXT RESPONSE message is sent to the gNB, and context request data of the UE is provided; the gNB controls the UE to carry out RRC connection in the target cell to recover RRC resource according to the received context request data; after the RRC Resume is executed, the UE is in an RRC_CONNECTED state and a CM-CONNECTED state, and sends RRC Resume Complete information to the gNB to inform the gNBRRC connection recovery is completed; if the user data cached in the Last Serving gNB is to be prevented from being lost, the gNB transmits the cached user data to the Last Serving gNB by transmitting a forwarding address Xn-ADDRESS INDICATION to the Last Serving gNB; after the gNB receives the RRC Resume Complete message sent by the UE, the gNB needs to send a path switch REQUEST message PATH SWITCH REQUEST to a core network access and mobility management function (AMF, core Access and Mobility Management Function) to trigger the Last Serving gNB to release the UE resources; after receiving the path switch REQUEST RESPONSE message PATH SWITCH REQUEST RESPONSE returned by the AMF, the gNB sends a UE resource release message UE CONTEXT RELEASE to the UE, and triggers the Last Serving gNB to release the UE resource, so that the whole inter-station RRC connection recovery process is completed.
In addition to inter-station RRC connection recovery, there may also be RRC connection recovery across RNAs. Referring to fig. 6, a flowchart of RRC connection recovery across RNAs provided by an embodiment of the present invention is shown. The cross-RNA is necessary to cross the base station, so that the cross-RNA RRC connection recovery flow is basically consistent with the inter-station RRC connection recovery flow, and the difference is that, when the cross-RNA is used, an RRC connection recovery request RRC Resume Request sent by the UE carries an RNA update identification RNA Updata, and when the gNB receives RETRIEVE UE CONTEXT RESPONSE information returned by the Last Serving gNB, the UE can be moved to an RRC_CONNECTED state, or the UE is sent back to an RRC_INACTIVE state, or the UE is sent to an RRC_IDLE; and, after the AMF returns a path switch REQUEST RESPONSE message PATH SWITCH REQUEST RESPONSE to the gNB, the gNB needs to send an RRC release suspension indication message RRC Release Suspend Indication to the UE.
In general, when the target base station receives the RRC connection recovery request and the target base station is not the source base station, it is further determined whether to cross RNA, so as to determine whether to initiate an inter-station RRC connection recovery procedure or a cross-RNA RRC connection recovery procedure.
In summary, in the embodiment of the present invention, the base station counts the RRC connection recovery success rate of the cell through timing, and configures a preset field for the cell when the RRC connection recovery request success rate of the cell is less than or equal to a preset threshold, so that when the UE selects a resident cell performing RRC connection recovery, the UE obtains the RRC connection recovery success rate of the target cell by reading the preset field, so as to determine a suitable recovery policy according to the RRC connection recovery success rate of the target cell, and when the RRC connection recovery success rate of the target cell is less than or equal to the preset threshold, and the signal strength of the target cell is the source cell or the source cell is greater than the preset strength threshold, the base station receives the first RRC connection recovery request sent by the UE, thereby controlling the UE to perform RRC connection recovery in the source cell, reducing signaling overhead and equipment power consumption of RRC connection recovery, and improving processing efficiency.
In the embodiment of the invention, after receiving the RRC connection request sent by the UE, the base station further judges whether the current RRC connection recovery success rate of the target cell is smaller than or equal to the preset threshold under the condition that the base station is not the source base station, thereby avoiding the influence of the change of the RRC connection recovery success rate of the target cell on the RRC connection recovery result.
Example five
Referring to fig. 7, a block diagram of a processing apparatus for radio resource control RRC connection recovery according to a fifth embodiment of the present invention is shown, and the processing apparatus is applied to a user equipment UE, and specifically includes:
a first target cell determining module 501 is configured to determine a target cell according to a cell reselection criterion.
The first recovery success rate determining module 502 is configured to determine, according to a preset field of the target cell, whether an RRC connection recovery success rate of the target cell is less than or equal to a preset threshold.
The preset field is set by a target base station corresponding to the target cell according to the RRC connection recovery success rate of the target cell counted periodically.
A cell determining module 503, configured to determine whether the target cell is a source cell according to a cell identifier if the RRC connection recovery success rate of the target cell is less than or equal to a preset threshold.
A first recovery request sending module 504, configured to send a first RRC connection recovery request to a source base station corresponding to the source cell when the target cell is the source cell or the signal strength of the source cell is greater than a preset strength threshold.
The signal strength of the source cell includes reference signal received power RSRP of the source cell measured by the UE.
In the fifth embodiment, the device embodiment corresponding to the first method embodiment may refer to the detailed description of the first embodiment, and will not be described herein.
Example six
Referring to fig. 8, a block diagram of a processing apparatus for radio resource control RRC connection recovery according to a sixth embodiment of the present invention is shown, and the processing apparatus is applied to a user equipment UE, and specifically includes:
a first target cell determining module 601, configured to determine a target cell according to a cell reselection criterion.
Optionally, the first target cell determining module 601 includes:
the carrier frequency acquisition sub-module is used for acquiring a first carrier frequency and a first carrier frequency priority of the source cell and a second carrier frequency priority of a neighboring cell;
a signal strength calculation sub-module, configured to calculate a first signal strength of the source cell and a second signal strength of the neighbor cell if the first carrier frequency is equal to the second carrier frequency or the first carrier frequency priority is equal to the second carrier frequency priority;
And the first target cell determining submodule is used for determining the neighbor cell as a target cell meeting a cell reselection criterion if the first signal strength is smaller than the second signal strength.
Optionally, the first target cell determining module 601 further includes:
a first residence time judging sub-module, configured to judge whether residence time of the UE in the source cell exceeds a preset time if the first carrier frequency priority is greater than the second carrier frequency priority;
a first determining submodule, configured to determine a first receiving level and a first receiving signal quality of the source cell, and a second receiving level and a second receiving signal quality of the neighbor cell if a residence time of the UE in the source cell exceeds a preset time;
a second target cell determining sub-module, configured to determine that the neighboring cell is a target cell that satisfies a cell reselection criterion if the first reception level is less than a first low frequency reselection threshold and the second reception level is greater than the second low frequency reselection threshold; or alternatively, the process may be performed,
and the third target cell determining submodule is used for determining the neighbor cell as a target cell meeting a cell reselection criterion if the first received signal quality is smaller than a third low-frequency reselection threshold and the second received signal quality is larger than a fourth low-frequency reselection threshold.
Optionally, the first target cell determining module 601 further includes:
a second residence time judging sub-module, configured to judge whether residence time of the UE in the source cell exceeds a preset time if the first carrier frequency priority is less than the second carrier frequency priority;
a second determining submodule, configured to determine a second reception level and a second reception signal quality of the neighboring cell if the residence time of the UE in the source cell exceeds a preset time;
a fourth target cell determining submodule, configured to determine the neighboring cell as a target cell satisfying a cell reselection criterion if the second reception level is greater than a first high-frequency reselection threshold; or alternatively, the process may be performed,
and a fifth target cell determining submodule, if the second received signal quality is greater than a second high-frequency reselection threshold, determining that the adjacent cell is a target cell meeting a cell reselection criterion.
The first recovery success rate determining module 602 is configured to determine, according to a preset field of the target cell, whether an RRC connection recovery success rate of the target cell is less than or equal to a preset threshold.
The preset field is set by a target base station corresponding to the target cell according to the RRC connection recovery success rate of the target cell counted periodically.
The cell determining module 603 is configured to determine whether the target cell is a source cell according to a cell identifier if the RRC connection recovery success rate of the target cell is less than or equal to a preset threshold.
Optionally, the cell judgment module includes:
a cell identifier obtaining sub-module, configured to read a first cell identifier of the target cell from a system message;
a cell identifier comparison sub-module for comparing the first cell identifier with a stored second cell identifier of the source cell;
a first cell determination sub-module, configured to determine that the target cell is the source cell if the first cell identifier is consistent with the second cell identifier;
and the second cell judging sub-module is used for determining that the target cell is not the source cell if the first cell identifier is inconsistent with the second cell identifier.
The first recovery request sending module 604 is configured to send a first RRC connection recovery request to a source base station corresponding to the source cell when the target cell is the source cell or the signal strength of the source cell is greater than a preset strength threshold.
The signal strength of the source cell includes reference signal received power RSRP of the source cell measured by the UE.
And a second recovery request sending module 605, configured to send a second RRC connection recovery request to a target base station corresponding to the target cell when the RRC connection recovery success rate of the target cell is greater than a preset threshold.
A second target cell determining module 606, configured to re-determine a target cell according to the cell reselection criterion when the target cell is not the source cell and the signal strength of the source cell is less than or equal to a preset strength threshold.
In the sixth embodiment, the device embodiment corresponding to the second method embodiment may refer to the detailed description of the second embodiment, which is not described herein.
Example seven
Referring to fig. 9, a block diagram of a processing apparatus for radio resource control RRC connection recovery according to a seventh embodiment of the present invention is shown, and the processing apparatus is applied to a base station, and specifically includes:
a recovery success rate statistics module 701, configured to periodically count RRC connection recovery request success rates of cells;
a field configuration module 702, configured to configure a preset field for the cell if the RRC connection recovery request success rate of the cell is less than or equal to a preset threshold;
a first recovery request receiving module 703, configured to receive a first RRC connection recovery request sent by the user terminal UE.
The first RRC connection recovery request is sent by the UE when an RRC connection recovery success rate of a target cell is less than or equal to a preset threshold, and the target cell is a source cell or a signal strength of the source cell is greater than a preset strength threshold.
Optionally, the signal strength of the source cell includes a reference signal received power RSRP of the source cell measured by the UE.
The seventh embodiment is an embodiment of a device corresponding to the third embodiment of the method, and the detailed information may refer to the detailed description of the third embodiment, which is not repeated herein.
Example eight
Referring to fig. 10, a block diagram of a processing apparatus for radio resource control RRC connection recovery according to an eighth embodiment of the present invention is shown, and the processing apparatus is applied to a base station, and specifically includes:
and the recovery success rate statistics module 801 is configured to periodically count the RRC connection recovery request success rate of the cell.
A field configuration module 802, configured to configure a preset field for the cell if the RRC connection recovery request success rate of the cell is less than or equal to a preset threshold.
A first recovery request receiving module 803, configured to receive a first RRC connection recovery request sent by the user terminal UE.
The first RRC connection recovery request is sent by the UE when an RRC connection recovery success rate of a target cell is less than or equal to a preset threshold, and the target cell is a source cell or a signal strength of the source cell is greater than a preset strength threshold.
Optionally, the signal strength of the source cell includes a reference signal received power RSRP of the source cell measured by the UE.
A second recovery request receiving module 804, configured to receive a second RRC connection recovery request sent by the UE.
And the second RRC connection recovery request is sent by the UE under the condition that the RRC connection recovery success rate of the target cell is greater than a preset threshold.
The second RRC connection recovery request carries a UE identifier allocated to the UE by the source base station.
And a judging module 805, configured to judge whether the base station is the source base station according to the UE identifier.
Optionally, the judging module includes:
the analyzing sub-module is used for analyzing the identity information of the source base station according to the UE identification;
and the judging sub-module is used for judging whether the target base station is the source base station according to the identity information.
A second recovery success rate determining module 806, configured to determine, if the base station is not the source base station, whether the current RRC connection recovery success rate of the target cell is less than or equal to a preset threshold.
A redirection module 807, configured to send an RRC release message to the UE if the current RRC connection recovery success rate of the target cell is less than or equal to a preset threshold.
The RRC release message comprises a redirection carrier signal of the source cell, so that the UE performs RRC connection recovery in the source cell according to the redirection carrier signal.
And a query module 808, configured to query the source base station in a preset neighbor base station table according to the UE identifier if the current RRC connection recovery success rate of the target cell is greater than a preset threshold.
A request module 809, configured to send a UE context request message to the source base station.
A receiving module 810, configured to receive context request data of the UE provided by the source base station.
A first control module 811 is configured to control the UE to perform RRC connection recovery in the target cell according to the context request data.
And a second control module 812, configured to control the UE to perform RRC connection recovery in the source cell according to the stored context request data of the UE.
The eighth embodiment is an embodiment of a device corresponding to the fourth embodiment of the method, and the detailed information may refer to the detailed description of the fourth embodiment, which is not repeated herein.
The embodiment of the invention also provides an electronic device, referring to fig. 11, including: a processor 1101, a memory 1102, and a computer program 11021 stored on the memory and executable on the processor, which when executed implements the processing method of RRC connection restoration of the foregoing embodiments.
The embodiment of the invention also provides a readable storage medium, which when the instructions in the storage medium are executed by a processor of the electronic device, enables the electronic device to execute the processing method for recovering the RRC connection of the previous embodiment.
For the device embodiments, since they are substantially similar to the method embodiments, the description is relatively simple, and reference is made to the description of the method embodiments for relevant points.
It should be noted that, in this document, the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such process, method, article, or apparatus. Without further limitation, an element defined by the phrase "comprising one … …" does not exclude the presence of other like elements in a process, method, article, or apparatus that comprises the element.
The embodiments of the present invention have been described above with reference to the accompanying drawings, but the present invention is not limited to the above-described embodiments, which are merely illustrative and not restrictive, and many forms may be made by those having ordinary skill in the art without departing from the spirit of the present invention and the scope of the claims, which are to be protected by the present invention.

Claims (19)

1. A method for processing radio resource control RRC connection recovery, applied to a user equipment UE, the method comprising:
determining a target cell according to a cell reselection criterion;
judging whether the RRC connection recovery success rate of the target cell is smaller than or equal to a preset threshold according to a preset field of the target cell, wherein the preset field is set by a target base station corresponding to the target cell according to the RRC connection recovery success rate of the target cell counted regularly;
judging whether the target cell is a source cell or not according to a cell identifier under the condition that the RRC connection recovery success rate of the target cell is smaller than or equal to a preset threshold;
and sending a first RRC connection recovery request to a source base station corresponding to the source cell under the condition that the target cell is the source cell or the signal intensity of the source cell is larger than a preset intensity threshold value.
2. The method according to claim 1, wherein after the step of determining whether the RRC connection recovery success rate of the target cell is less than or equal to a preset threshold according to the preset field of the target cell, the method further comprises:
and sending a second RRC connection recovery request to a target base station corresponding to the target cell under the condition that the RRC connection recovery success rate of the target cell is greater than a preset threshold.
3. The method according to claim 1, wherein after the step of determining whether the target cell is a source cell based on a cell identifier, the method further comprises:
and under the condition that the target cell is not the source cell and the signal intensity of the source cell is smaller than or equal to a preset intensity threshold value, the target cell is redetermined according to the cell reselection criterion.
4. The method of claim 1, wherein the step of determining the target cell based on the cell reselection criteria comprises:
acquiring a first carrier frequency and a first carrier frequency priority of the source cell, and a second carrier frequency priority of a neighboring cell;
if the first carrier frequency is equal to the second carrier frequency or the first carrier frequency priority is equal to the second carrier frequency priority, calculating the first signal strength of the source cell and the second signal strength of the neighbor cell;
and if the first signal strength is smaller than the second signal strength, determining that the neighbor cell is a target cell meeting a cell reselection criterion.
5. The method of claim 4, wherein after the step of obtaining the first carrier frequency and the first carrier frequency priority of the source cell and the second carrier frequency priority of the neighbor cell, further comprising:
If the first carrier frequency priority is greater than the second carrier frequency priority, judging whether the residence time of the UE in the source cell exceeds a preset time;
if the residence time of the UE in the source cell exceeds the preset time, determining a first receiving level and a first receiving signal quality of the source cell, and a second receiving level and a second receiving signal quality of the adjacent cell;
if the first receiving level is smaller than a first low-frequency reselection threshold and the second receiving level is larger than a second low-frequency reselection threshold, determining the neighbor cell as a target cell meeting a cell reselection criterion; or alternatively, the process may be performed,
and if the quality of the first received signal is smaller than a third low-frequency reselection threshold and the quality of the second received signal is larger than a fourth low-frequency reselection threshold, determining that the neighbor cell is a target cell meeting a cell reselection criterion.
6. The method of claim 4, wherein after the step of obtaining the first carrier frequency and the first carrier frequency priority of the source cell and the second carrier frequency priority of the neighbor cell, further comprising:
if the first carrier frequency priority is smaller than the second carrier frequency priority, judging whether the residence time of the UE in the source cell exceeds a preset time;
If the residence time of the UE in the source cell exceeds the preset time, determining a second receiving level and second receiving signal quality of the adjacent cell;
if the second receiving level is larger than a first high-frequency reselection threshold, determining the neighbor cell as a target cell meeting a cell reselection criterion; or alternatively, the process may be performed,
and if the second received signal quality is greater than a second high-frequency reselection threshold, determining the neighbor cell as a target cell meeting a cell reselection criterion.
7. The method according to claim 1, wherein the step of determining whether the target cell is a source cell based on a cell identifier comprises:
reading a first cell identifier of the target cell from a system message;
comparing the first cell identifier with a stored second cell identifier of the source cell;
if the first cell identifier is consistent with the second cell identifier, determining that the target cell is the source cell;
and if the first cell identifier is inconsistent with the second cell identifier, determining that the target cell is not the source cell.
8. The method according to claim 1, wherein the signal strength of the source cell comprises a reference signal received power, RSRP, of the source cell measured by the UE.
9. A method for processing radio resource control, RRC, connection recovery, applied to a base station, the method comprising:
periodically counting the RRC connection recovery request success rate of the cell;
if the success rate of the RRC connection recovery request of the cell is smaller than or equal to a preset threshold, configuring a preset field for the cell;
and receiving a first RRC connection recovery request sent by the user terminal UE, wherein the first RRC connection recovery request is sent by the UE when the RRC connection recovery success rate of a target cell is smaller than or equal to a preset threshold and the signal intensity of the target cell is larger than a preset intensity threshold.
10. The method of claim 9, wherein after the step of configuring the preset field for the cell, further comprising:
and receiving a second RRC connection recovery request sent by the UE, wherein the second RRC connection recovery request is sent by the UE when the RRC connection recovery success rate of the target cell is greater than a preset threshold.
11. The method of claim 10, wherein the second RRC connection recovery request carries a UE identity assigned to the UE by a source base station, the method further comprising:
Judging whether a target base station is the source base station according to the UE identification;
judging whether the current RRC connection recovery success rate of the target cell is smaller than or equal to a preset threshold or not under the condition that the target base station is not the source base station;
and if the current RRC connection recovery success rate of the target cell is smaller than or equal to a preset threshold, sending an RRC release message to the UE, wherein the RRC release message comprises a redirection carrier signal of the source cell, so that the UE performs RRC connection recovery in the source cell according to the redirection carrier signal.
12. The method according to claim 11, wherein after the step of determining whether the current RRC connection recovery success rate of the target cell is less than or equal to a preset threshold, further comprising:
if the current RRC connection recovery success rate of the target cell is greater than a preset threshold, inquiring the source base station in a preset neighbor base station table according to the UE identification;
sending a UE context request message to the source base station;
receiving context request data of the UE provided by the source base station;
and controlling the UE to carry out RRC connection recovery in the target cell according to the context request data.
13. The method of claim 11, wherein the step of determining whether a target base station is the source base station based on the UE identity comprises:
analyzing the identity information of the source base station according to the UE identification;
and judging whether the target base station is the source base station according to the identity information.
14. The method according to claim 9, wherein the method further comprises:
and controlling the UE to carry out RRC connection recovery in the source cell according to the stored context request data of the UE.
15. The method of claim 9, wherein the signal strength of the source cell comprises a reference signal received power, RSRP, of the source cell measured by the UE.
16. A processing apparatus for radio resource control, RRC, connection recovery, applied to a user terminal, UE, the apparatus comprising:
the first target cell determining module is used for determining a target cell according to a cell reselection criterion;
the first recovery success rate judging module is used for judging whether the RRC connection recovery success rate of the target cell is smaller than or equal to a preset threshold according to a preset field of the target cell, wherein the preset field is set by a target base station corresponding to the target cell according to the RRC connection recovery success rate of the target cell counted periodically;
The cell judging module is used for judging whether the target cell is a source cell or not according to a cell identifier under the condition that the RRC connection recovery success rate of the target cell is smaller than or equal to a preset threshold;
and the first recovery request sending module is used for sending a first RRC connection recovery request to a source base station corresponding to the source cell under the condition that the target cell is the source cell or the signal intensity of the source cell is larger than a preset intensity threshold value.
17. A processing apparatus for radio resource control, RRC, connection recovery, applied to a base station, the apparatus comprising:
the recovery success rate statistics module is used for periodically counting the RRC connection recovery request success rate of the cell;
a field configuration module, configured to configure a preset field for the cell if the RRC connection recovery request success rate of the cell is less than or equal to a preset threshold;
the first recovery request receiving module is configured to receive a first RRC connection recovery request sent by a user equipment UE, where the first RRC connection recovery request is sent by the UE when an RRC connection recovery success rate of a target cell is less than or equal to a preset threshold, and the target cell is a source cell or a signal strength of the source cell is greater than a preset strength threshold.
18. An electronic device, comprising:
a processor, a memory and a computer program stored on the memory and executable on the processor, characterized in that the processor implements a method of handling radio resource control, RRC, connection restoration according to any of claims 1 to 8 or 9 to 15 when executing the program.
19. A readable storage medium, characterized in that instructions in said storage medium, when executed by a processor of an electronic device, enable the electronic device to perform the processing method of radio resource control, RRC, connection restoration according to any of claims 1 to 8 or 9 to 15.
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