CN115426667A

CN115426667A - Processing method and device for switching exception and storage medium

Info

Publication number: CN115426667A
Application number: CN202211381159.3A
Authority: CN
Inventors: 夏月明
Original assignee: Honor Device Co Ltd
Current assignee: Honor Device Co Ltd
Priority date: 2022-11-06
Filing date: 2022-11-06
Publication date: 2022-12-02
Anticipated expiration: 2042-11-06
Also published as: WO2024093521A1; WO2024093521A9; CN115426667B

Abstract

The application provides a processing method and equipment for switching exception and a storage medium. According to the method, when a switching command which is made by a source base station aiming at a first measurement report is still not received after the terminal equipment sends the first measurement report to the source base station for the M-1 th time, after the M-th time, namely a last measurement report sender configured in measurement configuration issued by the source base station, by starting a first timer with a first timing duration, if the switching command issued by the source base station is still not received at the end of the first timing duration, the first measurement report is sent again, so that even if the sending times of the measurement reports configured in the measurement configuration are reached, the terminal equipment can be triggered to send the first measurement report to the source base station until the switching command which is made by the source base station aiming at the first measurement report is received, the terminal equipment can be ensured to always receive the switching command issued by the source base station, and then the terminal equipment is switched to an available network in time according to the switching command, and the service quality is ensured.

Description

Processing method and device for switching exception and storage medium

Technical Field

The present application relates to the field of communications technologies, and in particular, to a method, a device, and a storage medium for processing a handover exception.

Background

Handover is an important component of mobility management of Long Term Evolution (LTE) and New Radio/New air interface (NR) systems, and is an important link for guaranteeing service quality. Under normal conditions, when a terminal resides in a cell managed by a source base station (a currently accessed base station), the source base station issues measurement configuration to the terminal, the terminal performs measurement according to the measurement configuration, reports a measurement report (measurement report, MR) obtained by the measurement to the source base station, and the source base station issues a switching command to the terminal according to the measurement report, so that the terminal completes switching according to the switching command, namely, the terminal is switched to a target base station from the source base station.

However, in actual operation, there may be a loss of the measurement report reported by the terminal, a failure to reach the source base station, or a failure to process the measurement report after reaching the source base station.

Disclosure of Invention

In order to solve the above technical problem, the present application provides a method, a device, and a storage medium for processing a handover exception, which aims to enable a terminal to always receive a handover command issued by a source base station, so that the terminal can timely perform a handover to an available network according to the handover command, thereby ensuring service quality.

In a first aspect, the present application provides a method for handling a handover exception. The method is applied to the terminal equipment and comprises the following steps: receiving measurement configuration sent by a source base station, wherein the sending times of measurement reports configured in the measurement configuration are M, and M is greater than 0; measuring the searched first base station according to the measurement configuration in a source cell corresponding to the source base station to obtain a first measurement report corresponding to the first base station; after the M-1 th time of sending the first measurement report to the source base station, when a switching command which is made by the source base station for the first measurement report is still not received, and when a measurement report reporting interval configured in measurement configuration is met, the first measurement report is sent to the source base station for the M-th time, and a first timer with a first timing duration is started; when a switching command made by the source base station according to the first measurement report is not received within the first timing duration, after the first timing duration is over, and when a measurement report reporting interval configured in the measurement configuration is met, the first measurement report is sent to the source base station again; and executing the switching in response to a switching command made by the source base station according to the retransmitted first measurement report.

Therefore, when the terminal device still does not receive the switching command made by the source base station for the first measurement report after sending the first measurement report to the source base station for the M-1 th time, after the Mth time, namely the last time of the measurement report sender configured in the measurement configuration issued by the source base station, by starting the first timer with the first timing duration, if the switching command issued by the source base station is still not received at the end of the first timing duration, the first measurement report is sent again, so that even if the sending times of the measurement reports configured in the measurement configuration are reached, the terminal device can still be triggered to send the first measurement report to the source base station until the switching command made by the source base station for the first measurement report is received, thereby ensuring that the terminal device can always receive the switching command issued by the source base station, further timely switching to an available network according to the switching command, and ensuring the service quality.

According to the first aspect, before sending the first measurement report to the source base station the mth time and starting the first timer of the first timing duration, the method further comprises: when the terminal equipment is in a moving state, acquiring the current moving speed and the distance between the current position and the boundary of a source cell; according to the moving speed and the distance, the moving time of the terminal equipment from the current position to the boundary of the source cell according to the moving speed is estimated; when the moving time is longer than a first timing duration, executing a step of sending a first measurement report to the source base station M times, and starting a first timer of the first timing duration; otherwise, only sending the first measurement report to the source base station for the Mth time.

It can be understood that, if the moving time to the source cell boundary is not longer than the first timing length, the terminal device may search for another base station, such as a second base station, at the source cell boundary before retransmitting the first measurement report after the first timing length is over, and then transmit the measurement report of the second base station. In this case, it is not meaningful to retransmit the first measurement report. Therefore, the first timer is started only when the moving time is longer than the first timing time, and the process of resending the first measurement report is triggered, so that the method for processing the abnormal switching can be better suitable for practical application scenarios, and unnecessary resource occupation is reduced.

According to the first aspect, or any implementation manner of the first aspect, before sending the first measurement report to the source base station M times and starting the first timer with the first timing duration, the method further includes: determining the carrying capacity of a channel between the terminal equipment and the source base station according to the current Reference Signal Receiving Power (RSRP) of the source base station, and/or a reference signal receiving instruction (RSRQ), and/or a signal to noise ratio; when the bearing capacity of the channel meets the retransmission condition, executing the step of sending a first measurement report to the source base station M times and starting a first timer with a first timing duration; and when the bearing capacity of the channel does not meet the retransmission condition, only sending the first measurement report to the source base station for the Mth time.

Therefore, by judging the carrying capacity of the channel between the terminal equipment and the source base station, the first timer is started only when the carrying capacity meets the repeated conditions, such as more resources and less processing pressure of the retransmitted first measurement report on the source base station, and the process of retransmitting the first measurement report is triggered, so that the processing method for abnormal switching provided by the application can be better suitable for practical application scenarios, the pressure on the source base station is reduced, and the source base station can process the first measurement report under the condition that other services can be normally processed after the first measurement report is retransmitted.

According to the first aspect, or any implementation manner of the first aspect, the terminal device accessing the source base station includes a first terminal device and a second terminal device; before sending the first measurement report to the source base station M times and starting the first timer of the first timing duration when the bearer capability of the channel only supports one terminal device to start the timer and resend the first measurement report, the method further includes: when the priority of the first terminal equipment is higher than that of the second terminal equipment, the first terminal equipment executes the steps of sending a first measurement report to the source base station for the Mth time and starting a first timer with a first timing duration, and the second terminal equipment only sends the first measurement report to the source base station for the Mth time; and when the priority of the second terminal equipment is higher than that of the first terminal equipment, the second terminal equipment executes the steps of sending a first measurement report to the source base station for the Mth time and starting a first timer with a first timing duration, and the first terminal equipment only sends the first measurement report to the source base station for the Mth time.

Therefore, under the condition that the bearing capacity is not enough to bear all the currently accessed terminal equipment to trigger the retransmission of the first measurement report, the terminal equipment with high priority is selected to start the first timer with the first timing duration after the last first measurement report is sent, and then the first measurement report can be retransmitted when the switching command of the source base station for the first measurement report is not received within the first timing duration, and the flow is not started when the priority is low, so that the processing pressure of the source base station is reduced, the switching of the terminal equipment with high priority can be timely executed, and the normal execution of the service on the terminal equipment with high priority can be further ensured.

According to the first aspect, or any implementation manner of the first aspect above, the method further includes: when the priority of the first terminal equipment is equal to the priority of the second terminal equipment, determining a first priority of a service currently processed by the first terminal equipment and a second priority of the service currently processed by the second terminal equipment; when the first priority is higher than the second high priority, the first terminal equipment executes the steps of sending a first measurement report to the source base station for the Mth time and starting a first timer with a first timing duration, and the second terminal equipment only sends the first measurement report to the source base station for the Mth time; and when the second priority is higher than the first high priority, the second terminal equipment executes the steps of sending the first measurement report to the source base station for the Mth time and starting a first timer with the first timing duration, and the first terminal equipment only sends the first measurement report to the source base station for the Mth time.

Therefore, by considering the priority of the service executed on the terminal equipment with the same priority, and further selecting the proper terminal equipment to start the retransmission process according to the priority of the executed service, the actual use scene is better fitted.

According to the first aspect, or any implementation manner of the first aspect above, after retransmitting the first measurement report to the source base station, the method further includes: starting a second timer of a second timing duration; when a switching command made by the source base station according to the retransmitted first measurement report is not received within a second timing duration, after the second timing duration is ended, and when a measurement report reporting interval configured in the measurement configuration is met, the first measurement report is sent to the source base station again; when the second timing duration is over and a switching command made by the source base station for the retransmitted first measurement report is received, switching is executed; and when receiving a switching command made by the source base station aiming at the retransmitted first measurement report within the second timing duration, closing the second timer and executing switching.

Therefore, after the first timing duration is finished and the first measurement report is retransmitted, the second timer with the second timing duration is started again, that is, when the switching command of the source base station for the first measurement report is not received, the retransmission process is executed in a circulating manner until the switching command of the source base station for the first measurement report is received, so that the terminal equipment can be ensured to receive the switching command issued by the source base station all the time, and then the terminal equipment is switched to an available network in time according to the switching command, and the service quality is ensured.

According to the first aspect, or any implementation manner of the first aspect above, the first timing duration and the second timing duration are both greater than a duration in which the source base station processes the first measurement report to make the handover command.

Therefore, the switching command which is sent by the source base station under the condition of normal processing of the first measurement report can be received by the terminal equipment, the phenomenon that the terminal equipment triggers the operation of resending the first measurement report when the switching command can normally arrive is avoided, and unnecessary resource occupation is reduced.

According to the first aspect, or any implementation manner of the first aspect above, the method further includes: and when receiving a switching command made by the source base station for the first measurement report sent for the Mth time within the first time length, closing the first timer and executing switching.

Thus, the terminal device does not perform the operation of retransmitting the first measurement report to the source base station at the end of the first timing period.

According to the first aspect, or any implementation manner of the first aspect above, performing handover includes: sending a switching access request to the first base station through the wireless resources indicated in the switching command; and responding to a switching access response made by the first base station for the switching access request, and sending a switching completion message to the first base station to complete the switching.

The process of performing handover by the terminal device in response to the handover command issued by the source base station is as follows, step S109 to step S111, or step S211 to step S213, or step S311 to step S313, or step S412 to step S414, and specific implementation details are described below and will not be described herein again.

According to the first aspect, or any implementation of the first aspect above, M e {1,2,4,8, 16, 32, 64}.

It is understood that 1,2,4,8, 16, 32, 64 are r1, r2, r4, r8, r16, r32, r64 in the below reportammount values, respectively. That is, M (reportAmount) does not take on Infinity (countless times).

In a second aspect, the present application provides a terminal device. The terminal device includes: a memory and a processor, the memory and the processor coupled; the memory stores program instructions that, when executed by the processor, cause the terminal device to perform the instructions of the first aspect or any possible implementation of the first aspect.

Any implementation manner of the second aspect and the second aspect corresponds to any implementation manner of the first aspect and the first aspect, respectively. For technical effects corresponding to any one implementation manner of the second aspect and the second aspect, reference may be made to the technical effects corresponding to any one implementation manner of the first aspect and the first aspect, and details are not repeated here.

In a third aspect, the present application provides a computer readable medium for storing a computer program comprising instructions for performing the method of the first aspect or any possible implementation manner of the first aspect.

Any one implementation manner of the third aspect corresponds to any one implementation manner of the first aspect. For technical effects corresponding to any one implementation manner of the third aspect and the third aspect, reference may be made to the technical effects corresponding to any one implementation manner of the first aspect and the first aspect, and details are not repeated here.

In a fourth aspect, the present application provides a computer program comprising instructions for carrying out the method of the first aspect or any possible implementation manner of the first aspect.

Any one implementation manner of the fourth aspect and the fourth aspect corresponds to any one implementation manner of the first aspect and the first aspect, respectively. For technical effects corresponding to any one implementation manner of the fourth aspect and the fourth aspect, reference may be made to the technical effects corresponding to any one implementation manner of the first aspect and the first aspect, and details are not repeated here.

In a fifth aspect, the present application provides a chip comprising a processing circuit, a transceiver pin. Wherein the transceiver pin and the processing circuit are in communication with each other via an internal connection path, and the processing circuit executes the method of the first aspect or any one of the possible implementations of the first aspect to control the receiving pin to receive a signal and to control the transmitting pin to transmit a signal.

Any one implementation manner of the fifth aspect and the fifth aspect corresponds to any one implementation manner of the first aspect and the first aspect, respectively. For technical effects corresponding to any one of the implementation manners of the fifth aspect and the fifth aspect, reference may be made to the technical effects corresponding to any one of the implementation manners of the first aspect and the first aspect, and details are not repeated here.

Drawings

FIG. 1 is a schematic diagram of an exemplary illustrative scenario;

FIG. 2 is a timing diagram illustrating a normal handoff;

fig. 3 is a schematic diagram of a part of pseudo codes of measurement configurations issued by a source base station to a terminal in an exemplary handover scenario;

FIG. 4 is a timing diagram illustrating an exemplary abnormal switchover;

FIG. 5 is a schematic diagram illustrating the effect of abnormal handover on traffic rate;

fig. 6 is a schematic diagram of an exemplary hardware configuration of a terminal device;

fig. 7 is a schematic diagram illustrating a protocol stack for implementing the method for handling an abnormal handover provided in the embodiment of the present application;

fig. 8 is a timing diagram illustrating an example of a processing method for an abnormal handover according to an embodiment of the present application;

fig. 9 is a schematic diagram illustrating a change of a service rate after processing is performed based on the processing method for abnormal handover provided in the embodiment of the present application when the abnormal handover occurs;

fig. 10 is another timing chart of an exemplary processing method for an abnormal handover according to an embodiment of the present application;

fig. 11 is a flowchart illustrating a processing method for an abnormal handover according to an embodiment of the present application;

fig. 12 is a schematic diagram illustrating an exemplary processing flow for determining whether to initiate an abnormal handover according to an embodiment of the present application.

Detailed Description

The technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the drawings in the embodiments of the present application, and it is obvious that the described embodiments are some, but not all, embodiments of the present application. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present application.

The term "and/or" herein is merely an association relationship describing an associated object, and means that there may be three relationships, for example, a and/or B, which may mean: a exists alone, A and B exist simultaneously, and B exists alone.

The terms "first" and "second," and the like, in the description and in the claims of the embodiments of the present application are used for distinguishing between different objects and not for describing a particular order of the objects. For example, the first target object and the second target object, etc. are specific sequences for distinguishing different target objects, rather than describing target objects.

In the embodiments of the present application, words such as "exemplary" or "for example" are used to mean serving as an example, instance, or illustration. Any embodiment or design described herein as "exemplary" or "e.g.," is not necessarily to be construed as preferred or advantageous over other embodiments or designs. Rather, use of the word "exemplary" or "such as" is intended to present concepts related in a concrete fashion.

In the description of the embodiments of the present application, the meaning of "a plurality" means two or more unless otherwise specified. For example, a plurality of processing units refers to two or more processing units; the plurality of systems refers to two or more systems.

Before describing the technical solution of the embodiment of the present application, a wireless communication system corresponding to a scenario for which the method for processing an abnormal handover provided in the embodiment of the present application is applied and a handover scenario implemented based on the wireless communication system are described with reference to the accompanying drawings.

Illustratively, a wireless communication system may generally include a terminal (otherwise known as a mobile station), a base station, and a core network.

Wherein, the core network is used for taking charge of non-access stratum things (such as mobility management and the like); a Network formed by the base stations is called a Radio Access Network (RAN) and is used for taking charge of Access layer things (such as management of Radio resources and the like), and uplink/downlink Radio resources are scheduled by the base stations in a mode of sharing channels; the terminal refers to a device capable of communicating with a network, such as a mobile phone, a personal digital assistant, a notebook computer, an intelligent wearable device, an intelligent home device, and the like, and each terminal can only be connected to one base station in the network in an uplink direction.

In addition, it should be noted that, in practical application, the base station and the base station may be logically connected or physically connected as needed; each base station may be connected to one or more core network nodes.

For convenience of understanding, a wireless communication system includes a user side device, which is a terminal a, and three network side devices, which are a base station a, a base station B, and a base station C, and the base station a, the base station B, and the base station C all access to the same core network, and a base station (source base station) currently accessed by the terminal a is taken as the base station a for example, and a handover scenario is specifically described.

Referring to fig. 1, for example, the coverage of the base station a is a cell a, the coverage of the base station B is a cell B, and the coverage of the base station C is a cell C. After the base station a issues a measurement configuration (also referred to as measurement control) to the terminal a, when the user with the terminal a resides in the area AB, the terminal a performs measurement according to the measurement configuration issued by the base station a according to a new base station (base station B) searched to obtain a measurement report related to the relevant information of the base station B, and sends the measurement report to the base station a, so that the base station a determines whether to notify the terminal a to perform a handover operation according to the measurement report, and switches from the base station a to the base station B.

Based on the above implementation logic, with reference to fig. 2, the processing logic for normal handover of terminal a, base station a (source base station), and base station B (target base station) is specifically described.

S101, the base station A sends down the measurement configuration with the transmission times of the measurement report being 1 to the terminal A.

Specifically, the measurement configuration (measConfig) is issued to the terminal a in the form of measurement identifiers (measId), each measId including two elements, a measurement object (measObjectId) and a reporting configuration (reportConfigId). As shown in fig. 3, each measId may be placed in a measurement identity add modification list (measidtoaddmost). The configuration information on the measObjectId is placed in a measurement object addition modification list (measObjectIdToAddModList), and the configuration information on the reportConfigId is placed in a report configuration addition modification list (reportConfigIdToAddModList).

In addition, it should be noted that, regarding the measurement report sending time reportAmount corresponding to each measId configured in the measurement configuration, specifically, in the reportconfigidtodaddmodlist corresponding to the reportConfigId in the measId.

Continuing with fig. 3, for example, taking measId as 2 (measId 2) as an example, when the base station a configures the number of times of sending measurement reports corresponding to measId 2 as 1, reportammount in reportConfigId 2 will be configured as "r1".

In actual operation, based on Radio Resource Control (RRC) protocol, reportammont may take the values of r1 (1), r2 (2), r4 (4), r8 (8), r16 (16), r32 (32), r64 (64), and Infinity.

It can be understood that when the value of reportammount is r1, for a measurement report corresponding to the same base station, the terminal a sends the measurement report to the base station a only once, and even if the base station a does not receive the measurement report or receives the measurement report but does not process the measurement report, the terminal a does not send the measurement report to the base station a any more.

Correspondingly, when the value of reportammount is r2, for a measurement report corresponding to the same base station, after the terminal a sends the measurement report to the base station a once, if a response to the measurement report by the base station a is not received within a set time, the terminal a sends the measurement report to the base station a once again, and after the measurement report is sent to the base station a for the second time, even if the base station a does not receive the measurement report or receives the measurement report but does not process the measurement report, the terminal a does not send the measurement report to the base station a again. When the value of reportammont is r4, r8, r16, r32, or r64, the sending logic of the measurement report corresponding to the same base station is similar to that of reportammont which has the value of r2, and details are not repeated here.

In addition, for a scenario in which reportaminount is valued as Infinity, specifically, after the terminal a sends a measurement report corresponding to the same base station (e.g., base station B) to the base station a, if the base station a has not issued a processing result for the measurement report to the terminal a, if a handover command is issued, when the terminal a is resident in a cell capable of generating the measurement report, the terminal a sends the measurement report to the base station a until receiving a processing result that the base station a has made for the measurement report, or leaving the cell, or searching for another base station, e.g., base station C, and generating a measurement report for the base station C, the terminal a stops sending the measurement report corresponding to the base station B to the base station a, and then sends the measurement report corresponding to the base station C to the base station a according to the sending logic.

It should be understood that the above description is only an example for better understanding of the technical solution of the present embodiment, and is not to be taken as the only limitation of the present embodiment.

As can be seen from the above description, the abnormal handover addressed by the technical solution provided in the present application is specifically a scenario in which, when the reportammount value is not Infinity, the terminal a sends a reportammount measurement report to the base station a, and then still does not receive a processing result performed by the base station a for the measurement report. For convenience of explanation, the value of reportammount is taken as r 1.

And S102, the terminal A measures according to the measurement configuration to obtain a measurement report.

Continuing with fig. 3, exemplarily, in the reportconfigidedtoaddlmlist of the measurement configuration, measurement information may be configured for each reportConfigId, and if the information corresponding to the reportConfig is "reportConfigNR", it indicates that the report configuration information is report configuration information of 5GNR, if the information corresponding to the reporttype is "eventtggered", it indicates that the measurement report is an event type, if the information corresponding to the eventId is "eventA3", it indicates that the measurement is for an A3 event in the RRC protocol, if the information corresponding to the rsType is "ssb", it indicates that the measurement report is of a Synchronization Signal PBCH block, ssb), and if the information corresponding to the reportevent is "ms1024", it indicates that the measurement report interval is 1024ms.

It should be understood that fig. 3 is only an example for better understanding of the technical solution of the present embodiment, and is not to be taken as the only limitation of the present embodiment. In practical applications, the measurement configuration may further include other information, which may be specifically set based on a measurement configuration description given by the RRC protocol, and details are not described here.

For example, if the terminal a is located in an area AB shown in fig. 1 when receiving the measurement configuration that the reportammount value sent by the base station a is r1, the terminal a may search for an accessible base station B, and after performing corresponding measurement on the base station B according to the measurement configuration, a measurement report including relevant information of the base station B may be obtained.

Illustratively, in some implementations, the information related to the base station B includes, for example, reference Signal Receiving Power (RSRP), reference Signal Receiving Quality (RSRQ), signal-to-NOISE RATIO (SNR), and the like.

S103, the terminal a sends the measurement report to the base station a.

It can be understood that, since the specific reporting period (interval reportInteval at which the measurement report is reported each time) of the measurement report obtained by measurement is configured in the measurement configuration, when the reportAmount value is not r1, the measurement report can be reported for a set number of times according to the interval, and if the reportAmount value is r1, the measurement report is reported only once.

Based on this, the terminal a executes step S103 when the reporting condition is satisfied.

And S104, the base station A determines that the switching is required currently according to the measurement report, and selects the base station B as a target base station.

For example, the base station a may determine whether a handover condition is satisfied according to the related information about the base station B in the policy report and a preset handover control policy, for example, according to the above-mentioned parameters such as RSRP, RSRQ, and SNR, determine whether the network quality of the base station B is the network quality of the base station a, if the preset handover control policy indicates that the network quality of the newly searched base station (base station B) is better than the network quality of the base station a, determine that handover is currently required, and determine the base station corresponding to the measurement report, for example, the base station B in this embodiment, as the target base station.

S105, the base station A sends a switching request to the base station B, and carries the context of the terminal A in the switching request.

It can be understood that, in order for the base station B to know which terminal needs to be allocated with the radio resource, the base station a needs to add context information necessary for the terminal a to perform the communication service to the handover request, i.e. the context of the terminal a may be context information necessary for the terminal a to perform the communication service.

S106, the base station B allocates wireless resources for the terminal A according to the context of the terminal A.

The base station B allocates radio resources to the terminal a, which means that the terminal a is allocated with uplink/downlink operating frequencies, frequency carrier intervals, and the like.

S107, the base station B sends a switching request confirmation message to the base station A, and the switching request confirmation message carries the wireless resource allocated to the terminal A.

Specifically, after allocating radio resources such as uplink/downlink operating frequencies and frequency-carrier intervals to the terminal a according to the context information of the terminal a necessary for performing the communication service, the base station B makes a handover request acknowledgement message for the handover request sent by the base station a, and carries the radio resources allocated to the terminal a in the handover request acknowledgement message, so that the terminal a can initiate a handover access request to the base station B through the radio resources.

And S108, after receiving the switching request confirmation sent by the base station B, the base station A generates a switching command and sends the switching command to the terminal A.

Specifically, after receiving the handover request acknowledgement sent by the base station B, the base station a generates a handover command that also carries the radio resource allocated by the base station B to the terminal a. Thus, after receiving the handover command from the base station a, the terminal a can initiate a handover access request to the base station B through the radio resource, i.e. execute step S109.

S109, the terminal A responds to the switching command sent by the base station A, executes switching, and sends a switching access request to the base station B through the wireless resource distributed by the base station B.

S110, after receiving the handover access request sent by the terminal a, the base station B makes a handover access response to the handover access request.

And S111, after receiving the switching access response sent by the base station B, the terminal A sends a switching completion message to the base station B to complete the switching.

Therefore, when the network quality of the base station A is poor or the link between the terminal A and the base station A is abnormal, which causes the service rate realized by the terminal A based on the network to be poor, the link between the base station B and the terminal can replace the link between the base station A and the terminal A by switching the terminal A from the base station A to the base station B, thereby ensuring that the service of the terminal A can be continuously and normally carried out.

However, in actual operation, there may be a loss of a measurement report reported by the terminal, and the measurement report does not reach the source base station, or the source base station does not perform processing after reaching the source base station, in this case, the source base station does not issue a handover command to the terminal, and the terminal cannot be handed over to the target base station in time, which causes abnormal handover, affects the service on the terminal, and causes abnormal operation, for example, the service rate is continuously decreased. For better understanding of the scenario, taking the base station a as the source base station, the base station B as the base station searched for the first time, and the base station C as the base station searched for the second time as an example, the detailed description is made with reference to fig. 4.

S201, the base station a issues a measurement configuration with 1 measurement report transmission time to the terminal a.

S202, the terminal a performs measurement according to the measurement configuration to obtain a measurement report including the relevant information of the base station B.

S203, the terminal a sends a measurement report including the relevant information of the base station B to the base station a.

In this embodiment, the value of reportammount in the measurement configuration issued by the base station a to the terminal a is still taken as r1, and regarding the form of the measurement configuration, the measurement report (including the relevant information of the base station B) obtained by the terminal a performing measurement on the base station B searched for the first time after receiving the measurement configuration, and the specific details of the terminal a sending the measurement report to the base station a are described in the foregoing steps S101 to S103, which are not described herein again.

Continuing with fig. 4, for example, within 12S after terminal a sends the measurement report corresponding to base station B to base station a, base station a does not perform processing all the time, i.e., does not perform steps S104 to S108 described above. In this case, if the network quality of the base station a is unstable and continuously deteriorates (determined according to parameters such as RSRP, SNR, etc. of the base station a) as shown in fig. 5, the traffic rate of the terminal a is continuously decreased even to 0bps within 12s in case that the network quality of the base station a (source base station) is continuously deteriorated. If the terminal a stays in the area where the measurement report corresponding to the base station B is generated in the following period of time, the terminal a may not be able to search for other accessible base stations, and thus a new measurement report may not be generated, so that the terminal a may not send the measurement report corresponding to the base station B to the base station a under the condition that the reportaminount value is r1, and during this period, if the network of the base station a is still unavailable, the service rate of the terminal a may only stay at 0bps, so that the service that needs to use the network on the terminal a may not be performed normally, and user experience may be affected.

Illustratively, after the above situation occurs, that is, after terminal a sends a measurement report about the corresponding base station B to base station a, if base station a has not made any processing, during which terminal a moves to the cell C boundary shown in fig. 1, terminal a searches for base station C, in one implementation, step S204 may be executed as shown in fig. 4.

S204, the terminal a measures the base station C according to the measurement configuration sent by the base station a in step S201, and obtains a measurement report including the relevant information of the base station C.

S205, the terminal a sends a measurement report including the relevant information of the base station C to the base station a.

It can be understood that, regarding the timing when the terminal a sends the measurement report including the relevant information of the base station C to the base station a, it is also uploaded 1 time after the measurement report interval configured in the measurement configuration is satisfied.

Continuing with fig. 4, for example, if the base station a can process the measurement report including the relevant information of the base station C after receiving the measurement report reported by the terminal, the execution of steps S206 to S213 may be triggered.

S206, the base station A determines that the switching is needed currently according to the measurement report including the relevant information of the base station C, and selects the base station C as the target base station.

Regarding the determination process of determining whether handover is currently required and whether the base station C satisfies the target base station, the process is similar to the determination process performed on the base station B in step S104 in the foregoing embodiment, and details are not repeated here.

S207, the base station A sends a switching request to the base station C, and carries the context of the terminal A in the switching request.

S208, the base station C allocates wireless resources for the terminal A according to the context of the terminal A.

S209, the base station C sends a handover request acknowledgement message to the base station a, and the handover request acknowledgement message carries the radio resource allocated to the terminal a.

S210, after receiving the switching request confirmation sent by the base station C, the base station A generates a switching command and sends the switching command to the terminal A.

S211, the terminal A responds to the switching command sent by the base station A, executes switching, and sends a switching access request to the base station C through the wireless resource distributed by the base station C.

S212, after receiving the handover access request sent by the terminal a, the base station C makes a handover access response to the handover access request.

S213, after receiving the handover access response from the base station C, the terminal a sends a handover complete message to the base station C, thereby completing the handover.

It can be understood that, regarding the base station C as the target base station, the related resource allocation, handover procedure, etc. are similar to the above processing when the base station B is the target base station, and are not described herein again.

Continuing with fig. 5, for example, after terminal a sends a measurement report including information related to base station B to base station a at time t1, terminal a continuously deteriorates within 12s that base station a does not process the measurement report corresponding to base station B, until base station C is searched at time t2, and sends the measurement report corresponding to base station C to base station a, and after receiving the processing performed by base station a and switching to base station C, terminal a gradually recovers to normal based on the service rate realized by the network.

For this situation, if in actual application, the real-time requirement of the current service performed by the terminal a is high, the network quality of the base station a is not recovered for a long time, or the terminal a does not search for other accessible base stations, such as the base station C, and then the measurement report corresponding to the normal base station C is sent to the base station a, or the base station a still does not perform processing after receiving the measurement report corresponding to the base station C sent by the terminal a, then the service of the terminal a cannot be performed normally until the network of the base station a is recovered, or the terminal a enters another cell and is switched to another base station.

In view of this, the present application provides a method for processing one-frame abnormal handover, which aims to enable a terminal to always receive a handover command issued by a source base station, so that the terminal can switch to an available network in time according to the handover command, and ensure service quality.

In order to better understand the technical solutions provided by the embodiments of the present application, before describing the technical solutions of the embodiments of the present application, first, a hardware structure of a terminal device (e.g., a mobile phone, a tablet computer, a touch-enabled PC, etc.) applicable to the embodiments of the present application is described with reference to the drawings.

Referring to fig. 6, the terminal device 100 may include: the mobile terminal includes a processor 110, an external memory interface 120, an internal memory 121, a Universal Serial Bus (USB) interface 130, a charging management module 140, a power management module 141, a battery 142, an antenna 1, an antenna 2, a mobile communication module 150, a wireless communication module 160, an audio module 170, a speaker 170A, a receiver 170B, a microphone 170C, an earphone interface 170D, a sensor module 180, a button 190, a motor 191, an indicator 192, a camera 193, a display screen 194, a Subscriber Identity Module (SIM) card interface 195, and the like.

For example, in some implementations, the sensor module 180 may include a pressure sensor, a gyroscope sensor, a barometric pressure sensor, a magnetic sensor, an acceleration sensor, a distance sensor, a proximity light sensor, a fingerprint sensor, a temperature sensor, a touch sensor, an ambient light sensor, a bone conduction sensor, etc., which are not limited herein.

Furthermore, it should be noted that the processor 110 may include one or more processing units, such as: the processor 110 may include an Application Processor (AP), a modem processor, a Graphics Processor (GPU), an Image Signal Processor (ISP), a controller, a memory, a video codec, a Digital Signal Processor (DSP), a baseband processor, and/or a neural-Network Processing Unit (NPU), among others. The different processing units may be separate devices or may be integrated into one or more processors.

It is understood that the controller can be a neural center and a command center of the terminal device 100. In practical application, the controller can generate an operation control signal according to the instruction operation code and the timing signal to complete the control of instruction fetching and instruction execution.

It should also be noted that the processor 110 may be provided with a memory for storing instructions and data. In some implementations, the memory in the processor 110 is a cache memory. The memory may hold instructions or data that have just been used or recycled by the processor 110. If the processor 110 needs to reuse the instruction or data, it can be called directly from the memory. Avoiding repeated accesses reduces the latency of the processor 110, thereby increasing the efficiency of the system.

For example, in some implementations, processor 110 may include one or more interfaces. The interface may include an integrated circuit (I2C) interface, an integrated circuit built-in audio (I2S) interface, a Pulse Code Modulation (PCM) interface, a universal asynchronous receiver/transmitter (UART) interface, a Mobile Industry Processor Interface (MIPI), a general-purpose input/output (GPIO) interface, a Subscriber Identity Module (SIM) interface, and/or a Universal Serial Bus (USB) interface, etc.

Continuing with fig. 6, the charge management module 140 is illustratively configured to receive a charging input from a charger. The charger may be a wireless charger or a wired charger. In some wired charging implementations, the charging management module 140 may receive charging input from a wired charger via the USB interface 130. In some wireless charging implementations, the charging management module 140 may receive a wireless charging input through a wireless charging coil of the terminal device 100. The charging management module 140 may also supply power to the terminal device through the power management module 141 while charging the battery 142.

Continuing to refer to fig. 6, the power management module 141 is illustratively coupled to the battery 142, the charge management module 140, and the processor 110. The power management module 141 receives input from the battery 142 and/or the charge management module 140 and provides power to the processor 110, the internal memory 121, the external memory, the display 194, the camera 193, the wireless communication module 160, and the like. The power management module 141 may also be used to monitor parameters such as battery capacity, battery cycle count, battery state of health (leakage, impedance), etc. In some other implementations, the power management module 141 may also be disposed in the processor 110. In other implementations, the power management module 141 and the charging management module 140 may be disposed in the same device.

Continuing to refer to fig. 6, illustratively, the wireless communication function of the terminal device 100 may be implemented by the antenna 1, the antenna 2, the mobile communication module 150, the wireless communication module 160, a modem processor, a baseband processor, and the like.

It should be noted that the antenna 1 and the antenna 2 are used for transmitting and receiving electromagnetic wave signals. Each antenna in terminal device 100 may be used to cover a single or multiple communication bands. Different antennas can also be multiplexed to improve the utilization of the antennas. For example: the antenna 1 may be multiplexed as a diversity antenna of a wireless local area network. In other implementations, the antenna may be used in conjunction with a tuning switch.

Continuing to refer to fig. 6, the mobile communication module 150 may provide a solution including 2G/3G/4G/5G wireless communication applied on the terminal device 100, for example. The mobile communication module 150 may include at least one filter, a switch, a power amplifier, a Low Noise Amplifier (LNA), and the like. The mobile communication module 150 may receive the electromagnetic wave from the antenna 1, filter, amplify, etc. the received electromagnetic wave, and transmit the electromagnetic wave to the modem processor for demodulation. The mobile communication module 150 may also amplify the signal modulated by the modem processor, and convert the signal into electromagnetic wave through the antenna 1 to radiate the electromagnetic wave. In some implementations, at least some of the functional modules of the mobile communication module 150 may be disposed in the processor 110. In some implementations, at least some of the functional modules of the mobile communication module 150 may be disposed in the same device as at least some of the modules of the processor 110.

Further, it should be noted that the modem processor may include a modulator and a demodulator. The modulator is used for modulating a low-frequency baseband signal to be transmitted into a medium-high frequency signal. The demodulator is used for demodulating the received electromagnetic wave signal into a low-frequency baseband signal. The demodulator then passes the demodulated low frequency baseband signal to a baseband processor for processing. The low frequency baseband signal is processed by the baseband processor and then transferred to the application processor. The application processor outputs a sound signal through an audio device (not limited to the speaker 170A, the receiver 170B, etc.) or displays an image or video through the display screen 194. In some implementations, the modem processor may be a stand-alone device. In other implementations, the modem processor may be provided in the same device as the mobile communication module 150 or other functional modules, independent of the processor 110.

With continued reference to fig. 6, the wireless communication module 160 may provide a solution for wireless communication applied on the terminal device 100, including Wireless Local Area Networks (WLANs) (such as wireless fidelity (Wi-Fi) networks), bluetooth (BT), global Navigation Satellite System (GNSS), frequency Modulation (FM), near Field Communication (NFC), infrared (IR), and the like. The wireless communication module 160 may be one or more devices integrating at least one communication processing module. The wireless communication module 160 receives electromagnetic waves via the antenna 2, performs frequency modulation and filtering processing on electromagnetic wave signals, and transmits the processed signals to the processor 110. The wireless communication module 160 may also receive a signal to be transmitted from the processor 110, perform frequency modulation and amplification on the signal, and convert the signal into electromagnetic waves through the antenna 2 to radiate the electromagnetic waves.

Specifically, in the technical solution provided in the embodiment of the present application, the terminal device 100 may further implement various services, such as an audio and video conference, a game, and the like, based on a wireless access network formed by the mobile communication module 150 or the wireless communication module 160 and an access base station.

In addition, it should be noted that the terminal device 100 implements the display function through the GPU, the display screen 194, the application processor, and the like. The GPU is a microprocessor for image processing, and is connected to the display screen 194 and an application processor. The GPU is used to perform mathematical and geometric calculations for graphics rendering. The processor 110 may include one or more GPUs that execute program instructions to generate or alter display information.

Continuing to refer to FIG. 6, illustratively, display screen 194 is used to display images, video, and the like. The display screen 194 includes a display panel. The display panel may be a Liquid Crystal Display (LCD), an organic light-emitting diode (OLED), an active-matrix organic light-emitting diode (active-matrix organic light-emitting diode, AMOLED), a flexible light-emitting diode (FLED), a miniature, a Micro-oeld, a quantum dot light-emitting diode (QLED), or the like. In some implementations, the terminal device 100 can include 1 or N display screens 194, N being a positive integer greater than 1.

Further, it should be noted that the terminal device 100 may implement a shooting function through the ISP, the camera 193, the video codec, the GPU, the display screen 194, the application processor, and the like.

In addition, it should be noted that the ISP is used to process data fed back by the camera 193. For example, when a photo is taken, the shutter is opened, light is transmitted to the camera photosensitive element through the lens, the optical signal is converted into an electrical signal, and the camera photosensitive element transmits the electrical signal to the ISP for processing and converting into an image visible to naked eyes. The ISP can also carry out algorithm optimization on the noise, brightness and skin color of the image. The ISP can also optimize parameters such as exposure, color temperature and the like of a shooting scene. In some implementations, the ISP may be provided in camera 193.

Further, it is noted that the camera 193 is used to capture still images or video. The object generates an optical image through the lens and projects the optical image to the photosensitive element. The photosensitive element may be a Charge Coupled Device (CCD) or a complementary metal-oxide-semiconductor (CMOS) phototransistor. The light sensing element converts the optical signal into an electrical signal, which is then passed to the ISP where it is converted into a digital image signal. And the ISP outputs the digital image signal to the DSP for processing. The DSP converts the digital image signal into an image signal in a standard RGB, YUV and other formats. In some implementations, the terminal device 100 can include 1 or N cameras 193, N being a positive integer greater than 1.

In addition, it should be noted that the digital signal processor is used for processing digital signals, and can also process other digital signals besides digital image signals. For example, when the terminal device 100 selects a frequency point, the digital signal processor is used to perform fourier transform or the like on the frequency point energy.

In addition, it should be noted that the video codec is used for compressing or decompressing digital video. The terminal device 100 may support one or more video codecs. In this way, the terminal device 100 can play or record video in a plurality of encoding formats, such as: moving Picture Experts Group (MPEG) 1, MPEG2, MPEG3, MPEG4, and the like.

Continuing to refer to fig. 6, for example, the external memory interface 120 may be used to connect an external memory card, such as a Micro SD card, to implement the storage capability of the expansion terminal device 100. The external memory card communicates with the processor 110 through the external memory interface 120 to implement a data storage function. For example, files such as music, video, etc. are saved in the external memory card.

Continuing to refer to FIG. 6, for example, internal memory 121 may be used to store computer-executable program code, which includes instructions. The processor 110 executes various functional applications of the terminal device 100 and data processing by executing instructions stored in the internal memory 121. The internal memory 121 may include a program storage area and a data storage area. The storage program area may store an operating system, an application program (such as a sound playing function, an image playing function, etc.) required by at least one function, and the like. The storage data area may store data (such as audio data, a phonebook, etc.) created during use of the terminal device 100, and the like. In addition, the internal memory 121 may include a high-speed random access memory, and may further include a nonvolatile memory, such as at least one magnetic disk storage device, a flash memory device, a universal flash memory (UFS), and the like.

In addition, it should be noted that the terminal device 100 may implement an audio function through the audio module 170, the speaker 170A, the receiver 170B, the microphone 170C, the earphone interface 170D, and the application processor. Such as music playing, recording, etc.

It should be noted that the audio module 170 is used for converting digital audio information into an analog audio signal and outputting the analog audio signal, and is also used for converting an analog audio input into a digital audio signal. The audio module 170 may also be used to encode and decode audio signals. In some implementations, the audio module 170 may be disposed in the processor 110, or some functional modules of the audio module 170 may be disposed in the processor 110.

With continued reference to fig. 6, exemplary keys 190 include a power on key, a volume key, etc. The keys 190 may be mechanical keys. Or may be touch keys. The terminal device 100 may receive a key input, and generate a key signal input related to user setting and function control of the terminal device 100.

Continuing with fig. 6, for example, the motor 191 may generate a vibration cue. The motor 191 may be used for incoming call vibration cues, as well as for touch vibration feedback. For example, touch operations applied to different applications (e.g., photographing, audio playing, etc.) may correspond to different vibration feedback effects. The motor 191 may also respond to different vibration feedback effects for touch operations applied to different areas of the display screen 194. Different application scenes (such as time reminding, receiving information, alarm clock, game and the like) can also correspond to different vibration feedback effects. The touch vibration feedback effect may also support customization.

Continuing to refer to fig. 6, for example, indicator 192 may be an indicator light that may be used to indicate a charge status, a charge change, or a message, missed call, notification, etc.

While the description is made with respect to the hardware configuration of the terminal device 100, it should be understood that the terminal device 100 shown in fig. 6 is merely an example, and in particular implementations, the terminal device 100 may have more or fewer components than those shown, may combine two or more components, or may have a different configuration of components. The various components shown in fig. 6 may be implemented in hardware, software, or a combination of hardware and software, including one or more signal processing and/or application specific integrated circuits.

In addition, it should be noted that, in the method for handling abnormal handover provided by the present application, specifically, a modulator (Modem) of the terminal device interacts with the source base station and the target, so as to implement handover of the terminal from the source base station to the target base station. The processing logic for interaction between the Modem and the source base station and the target base station is specifically completed in a protocol stack corresponding to the Modem.

Illustratively, the protocol stack is, for example, a third generation partnership project (3 GPP) protocol stack, and the architecture of the 3GPP protocol stack is shown in fig. 7.

Referring to fig. 7, for example, the 3GPP Protocol stack generally includes 3 layers, which are a Physical Layer (PHY Layer) located at the first Layer, a Medium Access Control (MAC) Layer located at the second Layer, a Radio Link Control (RLC) Layer, a Packet Data Convergence Protocol (PDCP) Layer, and a Radio Resource Control (RRC) Layer located at the third Layer.

Continuing with fig. 7, for example, the physical layer uses the physical channel as an interface, receives data transmitted by other devices, and may provide services to an upper layer through the transmission channel, such as transmitting measurement configuration, control information and the like sent by the source base station to the layer without the resource control. In the resource control layer, after the control terminal sends the measurement report to the source base station, whether to start the timer and set the time length for the timer may be determined, so as to implement the processing of the method for processing the abnormal handover provided by the present application.

Referring to fig. 8, for example, still taking the base station a as the source base station, the measurement report generated by the terminal a for the first time according to the measurement configuration issued by the base station a is specific to the base station B, and the method for processing abnormal handover provided in the present application is specifically described.

S301, the base station a issues a measurement configuration with 1 measurement report transmission time to the terminal a.

S302, the terminal A measures according to the measurement configuration to obtain a measurement report including the relevant information of the base station B.

S303, the terminal a sends a measurement report including the relevant information of the base station B to the base station a.

In this embodiment, taking the value of reportammount in the measurement configuration issued by the base station a to the terminal a as r1 as an example, regarding the form of the measurement configuration, the measurement report (including the relevant information of the base station B) obtained by the terminal a measuring the base station B searched for the first time after receiving the measurement configuration, and the specific details of the terminal a sending the measurement report to the base station a, see the above steps S101 to S103, which are not described herein again.

S304, the terminal a starts a timer after sending the measurement report corresponding to the base station B to the base station a.

Specifically, the condition that the terminal a starts the timer at least needs to satisfy that the value of the reportammount configured in the measurement configuration is not infinite but known fixed times, such as r1 times.

For details of other judgment strategies for determining whether to start the timer and specific implementation details of setting the timing duration of the started timer, see the following (corresponding contents in the embodiment shown in fig. 11), which are not described herein again.

Furthermore, it can be understood that, when the timer is started, a timing duration needs to be set for the timer, and in order to shorten as much as possible that the measurement report sent by the base station a to the terminal a is not processed, so that the terminal a stays in the base station a for a long time, thereby avoiding that the service of the terminal a is affected, the duration set for the timer may be relatively short, for example, the duration set in fig. 8 is set to T1=5s.

Continuing with fig. 8, for example, within 5S after the terminal a sends the measurement report corresponding to the base station B to the base station a, that is, within the timing duration T1 of the timer, if the base station a does not perform processing (does not respond to the measurement report) all the time, that is, the above steps S104 to S108 are not performed. After the timer reaches the set timing duration T1 of the timer, the timer is automatically turned off, and the terminal a will send the measurement report including the relevant information of the base station B to the base station a again, that is, execute step S305.

S305, the terminal a sends the measurement report including the relevant information of the base station B to the base station a again.

Continuing with fig. 8, if the terminal a performs processing this time after retransmitting the measurement report corresponding to the base station B to the base station a, step S306 is executed, and if the base station B can respond normally, steps S307 to S313 may be executed in sequence.

S306, the base station A determines that the switching is needed currently according to the measurement report including the relevant information of the base station B, and selects the base station B as the target base station.

Regarding the determination process of determining whether handover is currently required and whether the base station B satisfies the target base station, the process is similar to the determination process performed on the base station B in step S104 in the foregoing embodiment, and details are not repeated here.

S307, the base station A sends a switching request to the base station B, and carries the context of the terminal A in the switching request.

S308, the base station B allocates wireless resources for the terminal A according to the context of the terminal A.

S309, the base station B sends a switching request confirmation message to the base station A, and the switching request confirmation message carries the wireless resource allocated to the terminal A.

And S310, after receiving the switching request confirmation sent by the base station B, the base station A generates a switching command and sends the switching command to the terminal A.

S311, the terminal A responds to the switching command sent by the base station A, executes switching, and sends a switching access request to the base station B through the wireless resource distributed by the base station B.

S312, after receiving the handover access request sent by the terminal a, the base station B makes a handover access response to the handover access request.

S313, after receiving the handover access response from the base station B, the terminal a sends a handover complete message to the base station B, thereby completing the handover.

The operations of step S306 to step S313 are substantially similar to those of step S104 to step S111 in the above embodiment, and are not repeated herein.

Therefore, when the value of reportammount in the measurement configuration sent by the base station a (source base station) to the terminal a is not infinite, but is a known fixed number of times, for example, r1 times, when the terminal a meets the reporting condition specified in the measurement configuration, and reports the measurement report corresponding to the currently searched available base station (e.g., base station B) to the base station a, by starting the timer, when no feedback made by the base station a for the measurement report corresponding to the base station B is received within the timing duration, after the timing duration is over, by resending the measurement report corresponding to the base station B to the base station a, the base station a can receive the measurement report reported by the terminal a again, so as to make processing, trigger the terminal a to switch to the base station B with better network quality in time, so that the service rate of the terminal a can be raised back in time, and further ensure that the service of the terminal a can be performed normally.

Referring to fig. 9, for example, based on the processing method for abnormal handover provided in this embodiment, after a terminal a sends a measurement report corresponding to a base station B to the base station a at time T1 and starts a timer (T1 =5 s), if a feedback made by the base station a for the measurement report is not received within 5s from T1 to T3, that is, within a timing duration, a service rate of the terminal a gradually decreases along with a deterioration of a network provided by the base station a, after the timing duration ends, at time T3, the terminal a reports a measurement report corresponding to the base station B to the base station a again, and if the base station a performs a feedback after the reporting operation, after time T3, the terminal a may switch to the base station B with better network quality according to a handover command issued by the base station a, so that the service rate of the terminal a may be in an upward trend, thereby ensuring that the service of the terminal a normally proceeds, and the terminal a cannot be accessed to the base station B for a long time in fig. so that the service rate of the terminal a decreases to 0bps, until the terminal a searches for a new base station C, and returns a measurement report a corresponding to the base station C, so that the terminal a normal service is reported.

In addition, in order to avoid the situation that the measurement report retransmitted by the terminal after the timing duration is still not processed by the source base station, and thus the terminal cannot be switched to the available base station in time, in some implementations, after the retransmission of the measurement report is finished by the timing duration, if the retransmission condition is still met, the timer may be started again, and if the feedback made by the source base station is still not received within the timing duration, the measurement report may be retransmitted again. According to the implementation logic, the retransmission of the measurement report of the previous base station is stopped until the feedback from the source base station is received after the measurement report is retransmitted, or the terminal leaves the cell of the source base station, or other available base stations are searched to generate a new measurement report. For ease of understanding, the following description is made in conjunction with fig. 10.

Referring to fig. 10, the method for processing abnormal switching provided in this embodiment specifically includes:

s401, the base station a issues a measurement configuration with 1 measurement report transmission time to the terminal a.

S402, the terminal A measures according to the measurement configuration to obtain a measurement report including the relevant information of the base station B.

S403, the terminal a sends a measurement report including the relevant information of the base station B to the base station a.

S404, the terminal a starts a timer after sending the measurement report corresponding to the base station B to the base station a.

S405, the terminal a sends the measurement report including the relevant information of the base station B to the base station a again.

For details of the implementation of the terminal a starting the timer and retransmitting the measurement report corresponding to the base station B after the timing duration is over, refer to step S304 and step S305 in the above embodiment, which are not described herein again.

S406, after the terminal a sends the measurement report including the relevant information of the base station B to the base station a again, the terminal a restarts the timer.

For example, in some implementations, the timing duration of the later-started timer may be less than the timing duration of the last-started timer, such as the timing duration of the timer started in step S404 may be set to T1=5S, and the timing duration of the timer started in step S406 may be set to T2=4S. The timing duration of the restarted timer may be gradually reduced to a measurement reporting interval time specified in the measurement configuration, such as 1024ms, if no processing by base station a is still received.

For example, in other implementations, the timer duration for each start may be the same.

Continuing with fig. 10, for example, if terminal a retransmits the measurement report of base station B to base station a, base station a performs processing, such as completing interaction with base station B, i.e., steps S407 to S411 are performed. If the processing in steps S407 to S411 is completed within the timing duration T2, that is, the terminal a receives the handover command from the base station a within time T2, for example, within 2S in the figure, the terminal a may choose to turn off the timer, and then step S412 is executed.

Furthermore, it can be understood that if the terminal a receives the handover command sent by the base station a when the timing duration T2 is over, the timer is automatically turned off, and the terminal a directly responds to the handover command, i.e., performs step S412.

In addition, it should be understood that, if the terminal a does not end the handover command sent to the base station a, it may continue to determine whether the start of the timer is satisfied, and repeat the measurement report again when the timer is satisfied, start the timer, set the timing duration, and re-execute the above processing.

In addition, it should be noted that, in order to avoid that the base station a receives the measurement report sent by the terminal a for processing, for example, interacting with the determined target base station, in the process of executing step S407 to step S410, the handover command has not yet been issued to the terminal a, the timer started by the terminal a reaches the timing duration, and then triggers retransmission, and the timing duration set by the timer needs to be greater than the total duration of the base station a and the base station B executing step S407 to step S411. For example, normally, when the processing duration of the flow is 500ms, the timing duration of the timer needs to be at least one cycle longer than the processing duration, such as at least 1s.

S407, the base station A determines that the handover is required currently according to the measurement report including the relevant information of the base station B, and selects the base station B as the target base station.

S408, the base station A sends a switching request to the base station B, and carries the context of the terminal A in the switching request.

S409, the base station B allocates wireless resources for the terminal A according to the context of the terminal A.

S410, the base station B sends a switching request confirmation message to the base station A, and the switching request confirmation message carries the wireless resource allocated to the terminal A.

S411, after receiving the handover request acknowledgement sent by the base station B, the base station a generates a handover command, and sends the handover command to the terminal a.

S412, the terminal a receives the handover command sent again by the base station a within the timing time of the second-started timer, closes the second-started timer, performs handover in response to the handover command sent by the base station a, and sends a handover access request to the base station B through the radio resource allocated by the base station B.

S413, after receiving the handover access request sent by the terminal a, the base station B makes a handover access response to the handover access request.

And S414, after receiving the switching access response sent by the base station B, the terminal A sends a switching completion message to the base station B to complete the switching.

The operations of step S407 to step 414 are substantially similar to those of step S104 to step S111 in the above embodiments, and are not repeated herein.

Therefore, based on the processing method for abnormal handover provided in this embodiment, when the source base station currently accessed by the terminal a, for example, the network of the base station a does not return to normal, and the terminal a does not search a new available base station, for example, before the base station C, the timer is started many times, and the measurement report corresponding to the base station B is retransmitted after the timing duration, and the repetition of the measurement report is not stopped until the feedback of the measurement report of the base station B by the base station a is received, and the timer is started, so that the terminal a can always receive the handover command issued by the base station a, and the terminal a can be timely handed over to an available network according to the handover command, thereby ensuring the quality of service.

In order to better understand specific implementation details of a suitable starting timer in the processing method for abnormal handover provided in the embodiment of the present application and setting a timing duration of the starting timer, the following description is specifically made with reference to fig. 11.

Referring to fig. 11, the method for processing an abnormal handover provided in the embodiment of the present application specifically includes:

s501, receiving measurement configuration sent by a source base station, wherein the sending times of measurement reports configured in the measurement configuration is M.

For example, the source base station is, for example, the base station a mentioned above, and the number M of times of sending the measurement report configured in the measurement configuration is the reportammount mentioned above.

For other configuration information included in the measurement configuration sent by the source base station, for example, as shown in fig. 3, for specific description, refer to the above, and are not described herein again.

In addition, it can be understood that, when M is reportammount, the method for performing abnormal handover provided in this embodiment is implemented on the premise that the reportammount is not infinite (i.e., can be any one of r1, r2, r4, r8, r16, r32, and r64, so that M belongs to {1,2,4,8, 16, 32, 64}.

S502, in a source cell corresponding to a source base station, measuring the searched first base station according to the measurement configuration to obtain a first measurement report corresponding to the first base station.

Illustratively, when the source base station is the base station a mentioned above, the source cell is, for example, the cell a shown in fig. 1, and when the terminal device (the terminal a in fig. 1) is located in the area AB in fig. 1, since the area AB is in the area a covered by the base station a and in the area B covered by the base station B, i.e. the first base station mentioned in this embodiment, can be searched in the area AB.

For the specific implementation details of the terminal device measuring the first base station according to the measurement configuration issued by the source base station and further obtaining the first measurement report corresponding to the first base station, refer to the description above that the terminal a measures the base station B according to the measurement configuration issued by the base station a and further obtains the measurement report including the relevant information of the base station B, and details are not repeated here.

S503, after the M-1 th time of sending the first measurement report to the source base station, when the switching command made by the source base station for the first measurement report is still not received, and when the reporting interval of the measurement report configured in the measurement configuration is met, the first measurement report is sent to the source base station for the M-th time, and a first timer with a first timing duration is started.

In order to avoid that the source base station is overloaded and waste of resources of the terminal device is increased, the first timer with the first timing duration is started after the terminal device sends the first measurement report for the last time in all scenes. When the first measurement report is sent for the last time, whether the first timer is started at present can be judged, and the terminal device is triggered to execute the process of retransmitting the first measurement report.

For example, in some implementations, before sending the first measurement report to the source base station M times and starting the first timer of the first timing duration, it may be determined whether the terminal device is in a moving state, for example, it may be determined whether the terminal device is moving according to a displacement change of the mobile terminal device within a continuous duration.

Accordingly, when the mobile device is in a moving state, for example, the current moving speed may be obtained according to an accelerometer/acceleration sensor in the terminal device, or the next moving speed of the terminal device may be estimated according to the position change of the terminal device within the history duration, such as the moving speed v in fig. 12, and the distance between the current position and the cell boundary, such as the distance d between the terminal and the cell a boundary in fig. 12.

With continued reference to fig. 12, for example, after obtaining the moving speed v and the distance d, the moving time (moving time = d/v) can be estimated based on the calculation formula of the speed, the distance and the time. In deriving the time of the movement it is possible,

accordingly, when the moving time is longer than the first timing time, it may be determined that the condition for starting the first timer is satisfied, that is, step S503 may be performed. Otherwise, it indicates that the terminal device moves out of the cell a before the end of the first timing, and in this case, the terminal device searches for the base station C, and generates a measurement report (e.g., a second measurement report) including information related to the base station C, thereby sending the second measurement report to the source base station. Therefore, when the moving duration is not greater than the first timing duration, the terminal device directly sends the last, that is, the mth first measurement report to the source base station without starting the first timer.

For example, in other implementation manners, the carrying capacity of the channel between the terminal device and the source base station may be determined according to the current reference signal received power RSRP, and/or the reference signal received instruction RSRQ, and/or the signal-to-noise ratio of the source base station; further executing the step of sending the first measurement report to the source base station M times and starting a first timer with a first timing duration when the bearing capacity of the channel meets the retransmission condition; otherwise, the first measurement report is only sent to the source base station for the Mth time.

In another implementation manner, for the case that the carrying capacity of the channel between the terminal device and the source base station is limited, the priority of the terminal device currently accessing the source base station may be further determined, and then according to the priority of the terminal device, the terminal device with the higher priority is selected to perform the step of sending the first measurement report to the source base station M times, and starting the first timer with the first timing duration; and the low priority sends the first measurement report to the source base station only for the Mth time.

And the terminal equipment currently accessed to the source base station comprises two terminal equipment, namely the first terminal equipment and the second terminal equipment, and the bearing capacity of the source base station only supports one terminal equipment to start a timer, so that the first measurement report is retransmitted. The choice regarding the terminal device may follow the following rules.

Illustratively, when the priority of the first terminal device is higher than that of the second terminal device, the first terminal device performs the steps of sending the first measurement report to the source base station M times and starting the first timer with the first timing duration, and the second terminal device only sends the first measurement report to the source base station M times.

Illustratively, when the priority of the second terminal device is higher than the priority of the first terminal device, the second terminal device performs the steps of sending the first measurement report to the source base station M times and starting the first timer with the first timing duration, and the first terminal device only sends the first measurement report to the source base station M times.

For example, in another implementation manner, when the priority of the first terminal device is the same as the priority of the second terminal device, it may be further determined that the priorities of the services currently processed by the two terminals are set, and then according to the priorities of the services, the terminal device with the higher priority of the services is selected to perform the step of sending the first measurement report to the source base station M times, and starting the first timer with the first timing duration; and the first measurement report is only sent to the source base station for the Mth time when the priority is low.

Taking the service currently processed by the first terminal device as a first priority and the service currently processed by the second terminal device as a second priority, when the first priority is higher than the second high priority, the first terminal device executes the steps of sending a first measurement report to the source base station for the mth time and starting a first timer with a first timing duration, and the second terminal device only sends the first measurement report to the source base station for the mth time; and when the second priority is higher than the first high priority, the second terminal equipment executes the steps of sending the first measurement report to the source base station for the Mth time and starting a first timer with the first timing duration, and the first terminal equipment only sends the first measurement report to the source base station for the Mth time.

Understandably, the services currently processed by the terminal device may be, for example, an audio/video service, an audio/video conference service, an online game service, an instant messaging service, and the like.

For example, priority division can be performed according to the requirements of the services on the real-time performance and the network quality, for example, the service types of the audio/video service, the audio/video conference service, the online game service, and the like, which have high requirements on the real-time performance and the network quality, are set as high priority, and the instant messaging service is set as low priority.

Further, when the priorities of the services in different terminal devices are the same, it may combine other determination conditions, such as the distance between the terminal device and the source base station, and the waiting time from the first time of sending the first measurement report to the current time of the terminal device, and then synthetically select a suitable terminal device to start the first timer, so as to trigger the process of retransmitting the first measurement report.

For example, the distance from the source base station may be selected to ensure that the retransmitted first measurement report reaches the source base station as much as possible for the source base station to process.

For example, the waiting time may be selected to be longer, so that the terminal device can be switched to the target base station in time, so that the service rate of the terminal can be recovered to normal in time, and the service on the terminal can be ensured to be performed normally.

In addition, it should be noted that, in order to avoid that the source base station still does not perform processing after receiving the first measurement report retransmitted by the terminal device, the terminal device cannot be handed over to the first base station. After the first measurement report is retransmitted to the source base station, a timer may also be started again, for example, a second timer starting a second timing duration, for example, a timer of T2=4S started in step S406 in fig. 10.

Accordingly, when the handover command made by the source base station according to the retransmitted first measurement report is not received within the second timing duration, after the second timing duration ends, and when the measurement report reporting interval configured in the measurement configuration is met, the first measurement report may be sent to the source base station again.

Correspondingly, when the second timing duration is over, if a switching command made by the source base station for the retransmitted first measurement report is received, switching is executed; if a switching command made by the source base station for the retransmitted first measurement report is received within the second timing duration, the second timer is firstly closed, and then the switching is executed. Specific implementation details can be seen in the embodiment shown in fig. 10, and are not described herein again.

In addition, it should be noted that, during actual operation, if the timer needs to be started many times, it needs to be ensured that the timing duration corresponding to the timer started each time is greater than the duration for the source base station to process the first measurement report and make the handover command, and as described above, the first timing duration and the second timing duration are both greater than the duration for the source base station to process the first measurement report and make the handover command. Therefore, the switching command which is sent by the source base station under the condition of normal processing of the first measurement report can be received by the terminal equipment, the phenomenon that the terminal equipment triggers the operation of resending the first measurement report when the switching command can normally arrive is avoided, and unnecessary resource occupation is reduced.

S504, when the switching command made by the source base station according to the first measurement report is not received within the first timing duration, after the first timing duration is over, and when the reporting interval of the measurement report configured in the measurement configuration is met, the first measurement report is sent to the source base station again.

It can be understood that step S504 in this embodiment is similar to step S304 and step S404 in the above embodiment, and specific implementation details can be referred to the above embodiment, which are not described herein again.

In addition, it can be understood that, if a handover command made by the source base station for the first measurement report sent M times is received within the first time duration, the first timer needs to be turned off, and handover is performed. Therefore, the terminal device does not execute the operation of resending the first measurement report to the source base station when the first timing duration is finished, thereby reducing the occupation of resources and meaningless operation.

And S505, responding to a switching command made by the source base station according to the retransmitted first measurement report, and executing switching.

The terminal device performs handover in response to the handover command sent by the source base station, for example, sending a handover access request to the first base station through the radio resource indicated in the handover command, and after receiving a handover access response made by the first base station for the handover access request, sending a handover completion message to the first base station in response to the handover access response, thereby completing the handover. For details of implementation, see above, details are not described here.

Therefore, according to the method for processing abnormal handover provided by the embodiment of the application, when the terminal device still does not receive the handover command made by the source base station for the first measurement report after sending the first measurement report to the source base station for the M-1 th time, after the mth time, that is, after the last measurement report sender configured in the measurement configuration sent by the source base station is met, by starting the first timer with the first timing duration, if the handover command sent by the source base station is still not received at the end of the first timing duration, the first measurement report is sent again, so that even if the sending times of the measurement reports configured in the measurement configuration are reached, the terminal device can be triggered to send the first measurement report to the source base station until the handover command made by the source base station for the first measurement report is received, thereby ensuring that the terminal device can always receive the handover command sent by the source base station, and then perform handover to an available network according to the handover command, and ensuring service quality.

Furthermore, it is understood that the terminal device comprises corresponding hardware and/or software modules for performing the respective functions in order to implement the above-described functions. The present application is capable of being implemented in hardware or a combination of hardware and computer software in conjunction with the exemplary algorithm steps described in connection with the embodiments disclosed herein. Whether a function is performed as hardware or computer software drives hardware depends upon the particular application and design constraints imposed on the solution. Skilled artisans may implement the described functionality in varying ways for each particular application, with the embodiment described in connection with the particular application, but such implementation decisions should not be interpreted as causing a departure from the scope of the present application.

In addition, it should be noted that, in an actual application scenario, the method for processing a handover exception, which is provided by the foregoing embodiments and is implemented by the terminal device, may also be executed by a chip system included in the terminal device, where the chip system may include a processor. The system on chip may be coupled to the memory, so that the computer program stored in the memory is called when the system on chip is running, and the steps executed by the terminal device are implemented. The processor in the system on chip may be an application processor or a processor other than an application processor.

In addition, an embodiment of the present application further provides a computer-readable storage medium, where a computer instruction is stored in the computer storage medium, and when the computer instruction runs on a terminal device, the terminal device is caused to execute the relevant method steps to implement the method for processing the handover exception in the foregoing embodiment.

In addition, an embodiment of the present application further provides a computer program product, which when running on a terminal device, causes the terminal device to execute the above related steps, so as to implement the method for processing a handover exception in the above embodiment.

In addition, embodiments of the present application also provide a chip (which may also be a component or a module), which may include one or more processing circuits and one or more transceiver pins; the transceiver pin and the processing circuit communicate with each other through an internal connection path, and the processing circuit executes the related method steps to implement the method for processing the switching exception in the above embodiment, so as to control the receiver pin to receive the signal and control the transmitter pin to transmit the signal.

In addition, as can be seen from the above description, the terminal device, the computer readable storage medium, the computer program product, or the chip provided in the embodiments of the present application are all configured to execute the corresponding method provided above, so that beneficial effects achieved by the terminal device, the computer readable storage medium, the computer program product, or the chip may refer to beneficial effects of the corresponding method provided above, and are not described herein again.

The above embodiments are only used to illustrate the technical solutions of the present application, and not to limit the same; although the present application has been described in detail with reference to the foregoing embodiments, it should 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 the modifications or the substitutions do not make the essence of the corresponding technical solutions depart from the scope of the technical solutions of the embodiments of the present application.

Claims

1. A method for processing switching exception is applied to terminal equipment, and comprises the following steps:

receiving measurement configuration sent by a source base station, wherein the sending times of measurement reports configured in the measurement configuration are M, and M is greater than 0;

measuring the searched first base station according to the measurement configuration in a source cell corresponding to a source base station to obtain a first measurement report corresponding to the first base station;

after the M-1 th time of sending the first measurement report to the source base station, when a handover command made by the source base station for the first measurement report is still not received, and when a measurement report reporting interval configured in the measurement configuration is met, sending the first measurement report to the source base station for the M-th time, and starting a first timer with a first timing duration;

when a handover command made by the source base station according to the first measurement report is not received within the first timing duration, after the first timing duration is ended, and when a measurement report reporting interval configured in the measurement configuration is met, the first measurement report is sent to the source base station again;

performing handover in response to a handover command by the source base station based on the retransmitted first measurement report.

2. The method of claim 1, wherein before the sending the first measurement report to the source base station the mth time and starting the first timer for the first timing duration, the method further comprises:

when the terminal equipment is in a moving state, acquiring the current moving speed and the distance between the current position and the boundary of the source cell;

according to the moving speed and the distance, the moving time of the terminal equipment from the current position to the boundary of the source cell according to the moving speed is estimated;

when the moving time is longer than the first timing length, executing a step of sending the first measurement report to the source base station for the Mth time, and starting a first timer with a first timing length;

otherwise, only transmitting the first measurement report to the source base station for the Mth time.

3. The method of claim 1, wherein before the sending the first measurement report to the source base station the mth time and starting the first timer for the first timing duration, the method further comprises:

determining the carrying capacity of a channel between the terminal equipment and the source base station according to the current Reference Signal Receiving Power (RSRP) of the source base station, and/or a reference signal receiving instruction (RSRQ), and/or a signal to noise ratio;

when the bearing capacity of the channel meets the retransmission condition, executing the step of sending the first measurement report to the source base station for the Mth time and starting a first timer with a first timing duration;

and when the bearing capacity of the channel does not meet the retransmission condition, only sending the first measurement report to the source base station for the Mth time.

4. The method of claim 3, wherein the terminal device accessing the source base station comprises a first terminal device and a second terminal device;

before the sending the first measurement report to the source base station M times and starting the first timer with the first timing duration, when the bearer capability of the channel only supports one terminal device to start the timer and resend the first measurement report, the method further includes:

when the priority of the first terminal equipment is higher than that of the second terminal equipment, the first terminal equipment executes the steps of sending the first measurement report to the source base station for the Mth time and starting a first timer with a first timing duration, and the second terminal equipment only sends the first measurement report to the source base station for the Mth time;

and when the priority of the second terminal equipment is higher than that of the first terminal equipment, the second terminal equipment executes the steps of sending the first measurement report to the source base station for the Mth time and starting a first timer with a first timing duration, and the first terminal equipment only sends the first measurement report to the source base station for the Mth time.

5. The method of claim 4, further comprising:

when the priority of the first terminal device is equal to the priority of the second terminal device, determining a first priority of a service currently processed by the first terminal device and a second priority of the service currently processed by the second terminal device;

when the first priority is higher than the second high priority, the first terminal device performs the steps of sending the first measurement report to the source base station M times and starting a first timer with a first timing duration, and the second terminal device only sends the first measurement report to the source base station M times;

and when the second priority is higher than the first high priority, the second terminal equipment executes the steps of sending the first measurement report to the source base station for the Mth time and starting a first timer with a first timing duration, and the first terminal equipment only sends the first measurement report to the source base station for the Mth time.

6. The method of claim 1, wherein after the retransmitting the first measurement report to the source base station, the method further comprises:

starting a second timer of a second timing duration;

when a switching command made by the source base station according to the retransmitted first measurement report is not received within the second timing duration, after the second timing duration is over, and when a measurement report reporting interval configured in the measurement configuration is met, the first measurement report is sent to the source base station again;

when the second timing duration is over, and a switching command made by the source base station for the retransmitted first measurement report is received, executing switching;

and when receiving a switching command of the source base station for the retransmitted first measurement report within the second timing duration, closing the second timer and executing switching.

7. The method of claim 6, wherein the first timing duration and the second timing duration are both greater than a duration in which the handover command is made by the source base station processing the first measurement report.

8. The method of claim 1, further comprising:

and when receiving a switching command made by the source base station for the first measurement report sent for the Mth time within the first time duration, closing the first timer and executing switching.

9. The method according to any one of claims 1 to 8, wherein the performing handover comprises:

sending a handover access request to the first base station through the radio resource indicated in the handover command;

and responding to a switching access response made by the first base station for the switching access request, and sending a switching completion message to the first base station to complete the switching.

10. The method of any one of claims 1 to 8, wherein M e {1,2,4,8, 16, 32, 64}.

11. A terminal device, characterized in that the terminal device comprises: a memory and a processor, the memory and the processor coupled; the memory stores program instructions which, when executed by the processor, cause the terminal device to perform a method of handling a handover exception as claimed in any one of claims 1 to 10.

12. A computer-readable storage medium, characterized by comprising a computer program which, when run on a terminal device, causes the terminal device to execute the method of handling a handover exception as claimed in any one of claims 1 to 10.