CN114339916A

CN114339916A - Wireless link reestablishing method and related device

Info

Publication number: CN114339916A
Application number: CN202111675631.XA
Authority: CN
Inventors: 李淑蓉
Original assignee: Zeku Technology Beijing Corp Ltd
Current assignee: Zeku Technology Beijing Corp Ltd
Priority date: 2021-12-31
Filing date: 2021-12-31
Publication date: 2022-04-12

Abstract

The application provides a radio link reestablishment method and a related device, firstly, first measurement configuration information from a first network device is received, wherein the first measurement configuration information is used for indicating a cell switching condition of a first cell where the user equipment is located currently; then, when the first cell meets the cell switching condition, a first request message is sent to a second network device, and the first request message is used for requesting to perform radio link reestablishment with a second cell served by the second network device. The cell state can be rapidly detected when the network cannot provide normal data communication service due to a strong interference environment, the wireless link is forcibly triggered to be reestablished, the burden of network equipment is not increased while the data communication is rapidly recovered, and the user experience is greatly improved.

Description

Wireless link reestablishing method and related device

Technical Field

The present application relates to the field of communications technologies, and in particular, to a method and a related apparatus for reestablishing a wireless link.

Background

With the development of communication technology, data communication between people is faster and faster, but communication is often abnormal in some environments with serious signal interference, such as jamming and the like. For the user equipment in communication interaction, although there is a cell capable of providing service normally, the problem is limited by the behavior of the network or the problem of link signaling transmission, and the user equipment cannot be switched to the cell capable of providing data service normally in time, so that the user equipment stays in the original cell and cannot provide data communication, so that data is interrupted, for example, situations such as voice interruption, automatic hang-up, silence and the like may occur in the telephone process, and the user experience is not good.

Disclosure of Invention

In view of this, the present application provides a method and a related apparatus for reestablishing a radio link, which can forcibly reestablish the radio link and switch or camp on an optimal cell when a signal is poor and a cell switching fails in a strong interference environment, so as to ensure fast recovery of data communication.

In a first aspect, an embodiment of the present application provides a radio link reestablishment method, which is applied to a user equipment, and the method includes:

receiving first measurement configuration information from a first network device, wherein the first measurement configuration information is used for indicating a cell switching condition of a first cell in which the user equipment is located currently;

and when the first cell meets the cell switching condition, sending a first request message to second network equipment, wherein the first request message is used for requesting to perform wireless link reestablishment with a second cell served by the second network equipment.

In a second aspect, an embodiment of the present application provides a radio link reestablishing method, which is applied to a network device, and the method includes:

receiving a first request message, wherein the first request message is sent to the network equipment when a first cell where the user equipment is located currently meets the cell switching condition;

and performing radio link reestablishment between the second cell and the user equipment based on the first request message.

In a third aspect, an embodiment of the present application provides a radio link reestablishment apparatus, which is applied to a user equipment, and the apparatus includes:

a first receiving unit, configured to receive first measurement configuration information from a first network device, where the first measurement configuration information is used to indicate a cell handover condition of a first cell in which the user equipment is currently located;

a first sending unit, configured to send a first request message to a second network device when the first cell meets the cell handover condition, where the first request message is used to request to perform radio link reestablishment with a second cell served by the second network device.

In a fourth aspect, an embodiment of the present application provides a radio link reestablishing apparatus, which is applied to a network device, and the apparatus includes:

a second receiving unit, configured to receive a first request message, where the first request message is sent to the network device when a first cell in which the user equipment is currently located meets the cell handover condition;

a second sending unit, configured to perform radio link reestablishment between a second cell and the user equipment based on the first request message.

In a fifth aspect, this application provides a user equipment including a processor, a memory, and one or more programs stored in the memory and configured to be executed by the processor, the programs including instructions for performing the steps of the method according to any one of the first aspect of this application.

In a sixth aspect, embodiments of the present application provide a network device, including a processor, a memory, and one or more programs stored in the memory and configured to be executed by the processor, the program including instructions for performing the steps of the method according to any one of the second aspects of the embodiments of the present application.

In a seventh aspect, an embodiment of the present application provides a computer storage medium storing a computer program, the computer program comprising program instructions that, when executed by a processor, cause the processor to perform the method according to any one of the first aspect or the second aspect of the embodiment of the present application.

In an eighth aspect, the present application provides a computer program product, where the computer program product includes a non-transitory computer-readable storage medium storing a computer program, where the computer program is operable to cause a computer to perform some or all of the steps as described in any one of the methods of the first aspect of the embodiments of the present application. The computer program product may be a software installation package.

As can be seen, with the radio link reestablishment method and the related apparatus, first measurement configuration information from a first network device is received, where the first measurement configuration information is used to indicate a cell handover condition of a first cell in which the user equipment is currently located; then, when the first cell meets the cell switching condition, a first request message is sent to a second network device, and the first request message is used for requesting to perform radio link reestablishment with a second cell served by the second network device. The cell state can be rapidly detected when the network cannot provide normal data communication service due to a strong interference environment, the wireless link is forcibly triggered to be reestablished, the burden of network equipment is not increased while the data communication is rapidly recovered, and the user experience is greatly improved.

Drawings

In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings needed to be used in the description of the embodiments are briefly introduced below, and it is obvious that the drawings in the following description are some embodiments of the present invention, and it is obvious for those skilled in the art to obtain other drawings based on these drawings without creative efforts.

Fig. 1 is a system architecture diagram of a method for reestablishing a wireless link according to an embodiment of the present application;

fig. 2 is a flowchart illustrating a method for reestablishing a wireless link according to an embodiment of the present disclosure;

fig. 3 is a schematic flowchart illustrating a forced radio link re-establishment triggering condition according to an embodiment of the present application;

fig. 4 is a schematic flow chart of another first communication interaction provided in the embodiment of the present application;

fig. 5A is a schematic flowchart of a first communication interaction provided in an embodiment of the present application;

fig. 5B is a schematic flow chart of another first communication interaction provided in the embodiment of the present application;

fig. 6 is a flowchart illustrating another radio link reestablishment method according to an embodiment of the present application;

fig. 7 is a schematic structural diagram of a user equipment according to an embodiment of the present application;

fig. 8 is a schematic structural diagram of a network device according to an embodiment of the present application;

fig. 9 is a block diagram illustrating functional units of a radio link reestablishing apparatus according to an embodiment of the present disclosure;

fig. 10 is a block diagram illustrating functional units of another apparatus for reestablishing a wireless link according to an embodiment of the present disclosure.

Detailed Description

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

The terms "first," "second," and the like in the description and claims of the present application and in the above-described drawings are used for distinguishing between different objects and not for describing a particular order. Furthermore, the terms "include" and "have," as well as any variations thereof, are intended to cover non-exclusive inclusions. For example, a process, method, system, article, or apparatus that comprises a list of steps or elements is not limited to only those steps or elements listed, but may alternatively include other steps or elements not listed, or inherent to such process, method, article, or apparatus.

It should be understood that the term "and/or" herein is merely one type of association relationship that describes an associated object, meaning that three relationships may exist, e.g., a and/or B may mean: a exists alone, A and B exist simultaneously, and B exists alone. In addition, the character "/" in this document indicates that the former and latter related objects are in an "or" relationship. The "plurality" appearing in the embodiments of the present application means two or more.

The term "connect" in the embodiments of the present application refers to various connection manners, such as direct connection or indirect connection, to implement communication between devices, which is not limited in this embodiment of the present application.

Reference herein to "an embodiment" means that a particular feature, structure, or characteristic described in connection with the embodiment can be included in at least one embodiment of the application. The appearances of the phrase in various places in the specification are not necessarily all referring to the same embodiment, nor are separate or alternative embodiments mutually exclusive of other embodiments. It is explicitly and implicitly understood by one skilled in the art that the embodiments described herein can be combined with other embodiments.

The background and related terms of the present application are described below.

The preset communication events include:

event a1, the Reference Signal Received Power (RSRP) value of the serving cell is above the absolute threshold; this event can be used to turn off measurements between certain cells.

Event a2, the RSRP value of the serving cell is below the absolute threshold; this event may be used to turn on measurements between certain cells, since a handover or the like may occur after this event has occurred.

Event a3, the RSRP value of the neighbor cell is higher than the serving cell; this event may be used to decide whether the UE is handed over to a neighbor cell.

At event a4, the RSRP value of the neighbor cell is above the absolute threshold.

Event a5, the RSRP value of the serving cell is below an absolute threshold and the RSRP value of the neighbor cell is above an absolute threshold; this event may also be used to support handover.

A strong interference environment may result in a cell to which the user equipment is currently connected being unable to provide data services.

In a possible scenario, a network side configures a plurality of co-frequency cells to cause strong co-frequency interference, which results in data demodulation failure of a user equipment, where the serving cell generally shows that an RSRP value is very high, but a Reference Signal Receiving Quality (RSRQ) value is very low, in this case, although the network side configures an alien frequency point and a corresponding A3, a4, or a5 measurement event, because a cell measurement result does not satisfy a condition for reporting a measurement event configured on the network side, the user equipment cannot trigger measurement reporting of the measurement event A3, a4, or a5, and thus the user equipment always resides on a poor cell.

In a possible scenario, in the environment of the strong co-channel interference, A3, a4, or a5 measurement event is configured on the network side, and at the same time, the ue measures an adjacent cell and the measurement result thereof satisfies the reporting condition of the corresponding measurement event, and the end ue successfully sends a corresponding Measurement Report (MR) to the network side, but due to the reasons of load balancing, etc. or the problem of link transmission signaling, the network side does not receive or delays receiving a Handover command (Handover command) from the network side, resulting in Radio Link Failure (RLF), and a Radio Resource Control (RRC) layer initiates Radio link reconstruction (RRCRe-initialization) and re-resides in the network.

In a possible scenario, in a scenario with severe noise and Interference, the demodulation of the ue fails, and even if there is a cell that can provide normal service, data interruption is caused by being unable to switch to a normal cell due to network side configuration or load balancing.

The existing method generally introduces Conditional Handover (CHO), mainly judges whether to perform Conditional Handover through a network side, and is not described herein, but the method needs to store a large amount of cell Conditional Handover and access related information on the network side, has a large load, cannot adapt to all strong interference environments, and is poor in user experience.

In order to solve the above problem, embodiments of the present application provide a radio link reestablishment method and a related apparatus, so that when a current cell cannot provide data service in a strong interference environment and a network cannot send a handover instruction or a conditional handover instruction, a user equipment actively initiates a Forced radio link reestablishment (Forced RRE), which ensures that data communication is quickly recovered without increasing a burden of the network equipment, and greatly improves user experience.

Fig. 1 is a system architecture diagram of a Radio link reestablishment method according to an embodiment of the present invention, where the system architecture may be a 5G system, the 5G system is also called a New Radio (NR) system, and may also be a next generation mobile communication technology system of 5G, which is not limited in the present embodiment.

The system architecture includes user equipment 110 and network equipment 120,

the user equipment 110 may be an access terminal, a subscriber unit, a subscriber station, a Mobile Station (MS), a remote station, a remote terminal, a mobile device, a user terminal, a terminal device, a wireless communication device, a user agent, or a user equipment. The user equipment 110 may also be a cellular phone, a cordless phone, a Session Initiation Protocol (SIP) phone, a Wireless Local Loop (WLL) station, a Personal Digital Assistant (PDA), a handheld device with Wireless communication function, a computing device or other processing device connected to a Wireless modem, a vehicle-mounted device, a wearable device, a terminal device in a future 5G Network or a terminal device in a future evolved Public Land Mobile Network (PLMN), and the like, which is not limited in this embodiment.

The network device 120 may provide a communication network for the user equipment 110, and include a base station of a radio access network, a base station controller of the radio access network, and a device on the core network side. A Base Station (BS), also called a base station device, is a device deployed in a Radio Access Network (RAN) to provide a wireless communication function. For example, the device providing the base station function in the 2G network includes a Base Transceiver Station (BTS), the device providing the base station function in the 3G network includes a node B (NodeB), the device providing the base station function in the 4G network includes an evolved node B (eNB), the device providing the base station function in the Wireless Local Area Network (WLAN) is an Access Point (AP), the device providing the base station function in the 5G system is a gNB, and a node B (english: ng-eNB) that continues to evolve, the access network device 220 in the embodiment of the present disclosure further includes a device providing the base station function in a new communication system in the future, and the present disclosure does not limit a specific implementation manner of the access network device 220. The access network equipment may also include Home base stations (Home enbs, henbs), relays (Relay), Pico base stations Pico, etc. The base station controller is a device for managing a base station, such as a Base Station Controller (BSC) in a 2G network, a Radio Network Controller (RNC) in a 3G network, and a device for controlling and managing a base station in a future new communication system.

It should be noted that, when the mobile communication system shown in fig. 1 adopts a 5G system or a 5G next generation mobile communication technology system, the above network elements may have different names in the 5G system or the 5G next generation mobile communication technology system, but have the same or similar functions, and the embodiment of the present disclosure is not limited thereto.

It should be noted that the network device 120 may include a first network device, a second network device, and a third network device, where the first network device is configured to provide a service of a first cell, the second network device is configured to provide a service of a second cell, and the third network device is configured to provide a service of a third cell, and the second network device and the third network device may provide candidate cells for the user equipment to perform handover.

Through the system architecture, the method for reestablishing the wireless link provided by the embodiment of the application can be realized, and the wireless link can be forcibly reestablished and switched or resided in the optimal cell when poor signals and cell switching failure occur in a strong interference environment, so that the rapid recovery of data communication is ensured, and the user experience is greatly improved.

Fig. 2 is a schematic flow chart of a radio link reestablishment method provided in the embodiment of the present application, and the radio link reestablishment method is applied to a user equipment, and specifically includes the following steps:

step 201, receiving first measurement configuration information from a first network device.

The first measurement configuration information may include events a2, A3, a4, and a5 among preset communication events, that is, trigger conditions of events a2, A3, a4, and a5 that indicate cell handover is required.

Step 202, when the first cell meets the cell switching condition, sending a first request message to a second network device.

Wherein the first request message is for requesting a radio link re-establishment with a second cell served by the second network device. In this embodiment, the second cell may be a neighbor cell of the first cell. Illustratively, the second cell may be a neighbor cell having a better signal quality than the serving cell (e.g., in the case of trigger event A3), or the second cell may be a neighbor cell having a signal quality that meets the communication requirements (e.g., in the case of trigger event a4 or event a 5).

In a possible implementation manner, the second cell may be a candidate cell in which the second measurement value is greater than a second threshold and the reference signal received power is the highest. In this embodiment of the present application, the candidate cell may be a part or all of neighbor cells of the first cell, which is not limited in this embodiment of the present application.

It can be understood that the user equipment may initiate the radio link reestablishment immediately and actively when the first cell satisfies the cell handover condition, or the user equipment may report the detection result of the first cell to the first network equipment first when the first cell satisfies the cell handover condition, and initiate the radio link reestablishment actively again when the first network equipment does not initiate the radio link reestablishment.

Specifically, the user equipment may first send a first measurement report to the first network equipment, the first measurement report comprising an RSRP value of the first cell. Illustratively, the first measurement value may be an RSRP value. The following steps in which the first measurement value does not satisfy the cell switching condition are not described herein.

After receiving the first measurement report, the first network device may determine whether to send a cell handover command to the user equipment according to RSRP of the first cell. It should be noted that the first network device generally determines whether to send the cell handover command to the user equipment only according to the RSRP value, but in practical applications, the RSRP value may not accurately reflect the signal quality of the serving cell. It is possible that the first network device does not send a cell switch instruction to the first cell when the signal quality of the first cell is poor.

In view of this, in one possible embodiment, after sending the first measurement report to the first network device, when a cell handover instruction is not received from the first network device and a first measurement value of the first cell is continuously smaller than a first threshold value within a preset time period, the first request message is sent to the second network device.

The first measurement value may indicate a signal quality of the first cell, and the first measurement value may include at least one of a first reference signal received power, a first reference signal received quality, and a first signal-to-interference-plus-noise ratio in the first cell.

In one possible embodiment, after sending the first measurement report to the first network device, when a cell handover command is not received from the first network device and the first measurement value is greater than or equal to a first threshold within a preset time period, the radio link re-establishment is not initiated.

The first threshold may be a first reference signal reception quality threshold, a value of which may be set according to a requirement, and is not specifically limited herein, and the first threshold may also be a first signal to interference plus noise ratio threshold, and a value of which may be set according to a requirement, and is not specifically limited herein, it may be understood that, when the first measurement value includes the first reference signal reception quality, when the first reference signal reception quality is continuously less than the first reference signal reception quality threshold within a preset time duration, the radio link reestablishment may be initiated, and when the first reference signal reception quality is not continuously less than the first reference signal reception quality threshold within the preset time duration, the radio link reestablishment is not initiated; similarly, when the first measurement value includes the first signal to interference plus noise ratio, the radio link re-establishment may be initiated when the first signal to interference plus noise ratio is continuously smaller than the first signal to interference plus noise ratio threshold within the preset duration, and the radio link re-establishment is not initiated when the first signal to interference plus noise ratio is not continuously smaller than the first signal to interference plus noise ratio threshold within the preset duration. In a possible implementation manner, the second cell is a candidate cell whose second measurement value is greater than a second threshold value and whose reference signal received power is the highest, and the second cell corresponds to the second network device. It will be appreciated that the second measurement value is a measurement value that may be characteristic of the signal quality of the second cell, for example the second measurement value may comprise at least one of a reference signal received power, a reference signal received quality and a signal to interference plus noise ratio in said second cell. The second threshold may be a second reference signal received quality threshold, and the candidate cell greater than the second reference signal received quality threshold is a cell with the highest quality. The value of the second threshold is not particularly limited.

Specifically, the RSRP value of the first cell where the first network device is currently located may be obtained and a corresponding first measurement report may be reported to the first network device, where the RSRP value meets the trigger condition of the preset communication event, when a cell switching instruction from the first network equipment is not received, judging whether the receiving quality of the first reference signal in a preset time length is continuously less than a first quality threshold value, or, determining whether the first signal to interference plus noise ratio is continuously smaller than a first noise ratio threshold value within the preset time length, if the first reference signal receiving instruction is continuously smaller than the first quality threshold value within the preset time length, or, the first signal to interference plus noise ratio is continuously less than the first noise ratio threshold within the preset time period, it is determined that the radio link re-establishment is required and a first request message is sent to the second network device.

For convenience of understanding, the triggering condition for forced radio link re-establishment in this embodiment is described with reference to fig. 3, and fig. 3 is a schematic flowchart of a triggering condition for forced radio link re-establishment provided in this embodiment, which specifically includes the following steps:

s1, the ue receives at least one measurement event information, such as an a2 event, an A3 event, an a4 event, and an a5 event, configured by the first network device.

In a possible embodiment, when configuring the measurement event information, the first network device may perform update configuration according to a measurement report reported by the ue in the connected state, for example, the ue reports a measurement report of an a2 event, the first network device may further update the measurement event information and configure the measurement event information to the ue, and the updated measurement event information may be a measurement event such as A3, a4, a5, and the like, which is not described herein again.

And S2, the UE acquires the measurement result of the current cell and judges whether the measurement result meets the condition of any one of the A2 event, the A3 event, the A4 event and the A5 event.

Wherein, when the measurement result meets the condition of any one measurement event of the events A2, A3, A4 and A5, the step S3 is executed; when the measurement result meets the condition of any one of the measurement events of the event a2, the event A3, the event a4 and the event a5, the process returns to step S2.

It should be noted that, at this time, when the measurement time meets the reporting time condition (timeToTrigger), the ue reports the measurement report to the first network device, and if the first network device replies the handover command and the ue successfully switches the cell, the step of subsequently determining whether to force the radio link to be reestablished is not performed,

s3, the user equipment judges whether the RSRQ of the current cell is less than-18 db or the SINR of the current cell is less than-9 db.

Wherein-18 db and-9 db are merely exemplary illustrations and do not represent limitations of the embodiments of the present application, and when the RSRQ of the current cell is less than-18 db or the current SINR is less than-9 db, step S4 is executed; and returning to the step S2 when the RSRQ of the current cell is not less than-18 db or the current SINR is not less than-9 db.

S4, the user device records the current timestamp T1.

S5, the user equipment judges whether the RSRQ of the current cell is less than-18 db or the SINR of the current cell is less than-9 db again.

When the RSRQ of the current cell is less than-18 db or the current SINR is less than-9 db, performing step S7; when the RSRQ of the current cell is not less than-18 db or the current SINR is not less than-9 db, step S6 is performed.

S6, the user equipment clears the recorded time stamp and returns to step S2.

S7, the user equipment records the current time T2.

S8, the user equipment determines whether the time difference between T2 and T1 is greater than 1 second.

Wherein, when the time difference between T2 and T1 is greater than 1 second, step S9 is performed; when the time difference between T2 and T1 is not more than 1 second, return is made to step S5.

S9, the user equipment enforces the radio link reestablishment.

I.e. to send the first request message to the second network device.

The above-mentioned-18 db, -9db, 1 second are merely illustrative and do not represent a limitation of the embodiments of the present application.

After receiving the first request message, the second network device may perform radio link reestablishment between the second cell and the user equipment based on the first request message. It can be seen that, when the first cell meets the cell switching condition, the first request message is sent to the second network device, and forced wireless link reestablishment can be actively initiated by the user equipment, so that data communication can be quickly recovered, network load is not increased, and user experience is greatly improved.

Next, another radio link reestablishment method in the embodiment of the present application is described with reference to fig. 4, where fig. 4 is a schematic flow chart of another radio link reestablishment method provided in the embodiment of the present application, and specifically includes the following steps:

in step 401, a user equipment receives first measurement configuration information from a first network device.

The first measurement configuration information may indicate a cell handover condition of the first cell.

Step 402, the user equipment sends a first request message to the second network equipment when the first cell meets the cell switching condition.

The second network device may feed back the first reply message to the user equipment based on the first request message to complete the radio link re-establishment with the user equipment.

In step 403, the ue switches from the first cell to a second cell upon receiving a first response message in response to the first request message.

Wherein the data communication may be resumed after the handover from the first cell to the second cell.

Step 404, the ue camps on the third cell when not receiving the first response message.

And the third cell is any candidate cell with the reference signal quality larger than a third threshold value. After camping on the third cell, data communication may resume.

The candidate cell is explained below.

The second cell and the third cell are obtained based on a candidate cell sequence.

Wherein the candidate cell sequence comprises a first priority subset, a second priority subset and a third priority subset, the first priority subset comprises candidate cells with reference signal quality greater than the second threshold, the second priority subset comprises candidate cells with reference signal quality greater than the third threshold and less than or equal to the second threshold, the third priority subset comprises candidate cells with reference signal quality less than or equal to the third threshold, and the candidate cells in the first priority subset, the second priority subset and the third priority subset are arranged in order of the reference signal received power from large to small.

Specifically, the candidate cell sequence includes candidate cells ordered from high to low according to a preset priority; firstly, pilot frequency point sets from the second network device and the third network device and a historical frequency point set locally stored by the user equipment can be obtained, wherein the pilot frequency point set comprises at most a first number of pilot frequency points, the historical frequency point set comprises at most a second number of historical frequency points, then a pilot frequency cell corresponding to each pilot frequency point and a historical cell corresponding to each historical frequency point are obtained to obtain a third number of candidate cells, the third number is at most the sum of the first number and the second number, then a candidate measured value of each candidate cell is obtained, the candidate measured value comprises reference signal receiving power, reference signal receiving quality and signal-to-interference plus-noise ratio, and then the candidate cells corresponding to the reference signal quality larger than a second quality threshold are divided into a first priority subset; dividing candidate cells corresponding to the reference signal quality which is less than or equal to the second quality threshold and greater than a third quality threshold into a second priority subset; and dividing candidate cells corresponding to the reference signal quality smaller than or equal to the third quality threshold into a third priority subset, and finally, sorting the candidate cells in the first priority subset in the descending order of the reference signal received power, sorting the candidate cells in the second priority subset in the descending order of the reference signal received power, and sorting the candidate cells in the third priority subset in the descending order of the reference signal received power to obtain the candidate cell sequence.

Specifically, for example, at most 6 pilot frequency points configured by the second network device and the third network device may be selected, if the pilot frequency points are less than 6, all pilot frequency points configured by the second network device and the third network device may be selected, and at most 3 history frequency points stored by the user equipment are selected, that is, the history frequency points where 3 user equipments have resided once are selected according to a time reverse order, where the 3 history frequency points may include a frequency point corresponding to a currently resided cell, and if the history frequency points are less than 3, all history frequency points are selected. And then the selected historical frequency points and pilot frequency points form a frequency point list, the number of elements in the frequency point list is not more than 9, the frequency point list does not need to be sequenced, the user equipment can carry out cell search on each frequency point in the frequency point list one by one, and the user equipment can select and store the best cell (except for black cells and bar cells) on each frequency point because each frequency point can have a plurality of cells. After determining the cell corresponding to each frequency point in the frequency point list, the user equipment may obtain an RSRQ and an RSRP value of each cell, and sort according to the following policy:

dividing the cells with the RSRQ larger than-13 db into a first priority subset, and sorting the cells in the first priority subset from large to small according to the RSRP value;

dividing cells with the RSRQ larger than-18 db and smaller than or equal to-13 db into a second priority subset, and sequencing the cells in the second priority subset from large to small according to the RSRP value;

and dividing the cells with the RSRQ less than or equal to-18 db into a third priority subset, and sequencing the cells in the third priority subset from large to small according to the RSRP value.

And finally obtaining a candidate cell sequence.

The above-mentioned-13 db, -18db are merely illustrative and do not represent a limitation of the embodiments of the present application.

Therefore, when the wireless link is required to be reestablished, the candidate cell sequence is determined, the optimal cell can be determined, the resident cell or the wireless link is tried to be reestablished, the data communication can be quickly recovered, the data communication quality is improved, and the user experience is greatly improved.

For convenience of understanding, a situation of a first communication interaction in the embodiment of the present application is described with reference to fig. 5A, where fig. 5A is a flowchart of a first communication interaction provided in the embodiment of the present application, and the first communication interaction represents an interaction process from step 402 to step 404, and specifically includes the following steps:

q1, the user equipment sends an RRC reestablishment request (first request message) to the second network equipment.

Q2, the second network device feeds back an RRC reestablishment success message (first acknowledgement message) to the user equipment.

Q3, the user equipment sends an RRC reestablishment complete message to the second network equipment.

In a possible embodiment, another situation of the first communication interaction in the embodiment of the present application is described with reference to fig. 5B, where fig. 5B is a flowchart of another first communication interaction provided in the embodiment of the present application, and specifically includes the following steps:

b1, the user equipment sends an RRC reestablishment request (first request message) to the second network equipment.

B2, the second network device feeds back an RRC reject message (second acknowledgement message) to the user equipment.

B3, the user equipment tries to camp on the cells in sequence according to the candidate cell sequence until the camping is successful.

The successfully camped cell is a third cell, and the third cell is served by a third network device.

The method may only attempt to camp on the cells of the first priority subset and the second priority subset, so as to ensure that the quality of the camped cell meets the best effect of data communication, and when it is attempted that all the cells of the first priority subset and the second priority subset are not camped successfully, the user equipment re-initiates the cell search process, which is not described herein again.

Therefore, the first communication interaction is carried out to determine the reconstruction state of the second cell, the data communication can be quickly recovered, the network load is not increased, and the user experience is greatly improved.

Step 405, receiving second measurement configuration information sent by the third network device.

Wherein the second measurement configuration information is used to indicate a cell handover condition of the third cell.

It is to be understood that the second measurement configuration information is also used to indicate a predetermined communication event, and the second measurement configuration information is the same as the first measurement configuration information in content, and is only distinguished by name.

Step 406, when the third measurement value of the third cell meets the cell switching condition and is greater than the first threshold, not reporting a third measurement report to the third network device.

Wherein the third measurement value comprises a third reference signal received power and a third reference signal received quality, and the third measurement value meets a trigger condition of the preset communication event. And when the third reference signal received quality is greater than the first reference signal received quality threshold, not reporting a third measurement report to the network device.

As can be seen, since the service quality of the third cell in which the ue resides is better, cell handover is not required when the cell handover condition is satisfied, so as to prevent handover to the first cell again.

Step 407, reporting the third measurement report to the third network device when a third measurement value of a third cell meets the cell switching condition and the third measurement value is smaller than or equal to the first threshold.

Wherein when the third reference signal received quality is less than or equal to the first reference signal received quality threshold, a third measurement report is reported to the third network device.

It can be understood that the first reference signal received quality threshold is a limit, when the reference signal received quality of the cell is lower than the first reference signal received quality threshold, the cell signal may be considered to be poor, and when the third reference signal received quality is lower than the first reference signal received quality threshold, it indicates that the third cell is also a cell with poor signal, and it is necessary to report a third measurement report to the third network device to request cell handover.

Specifically, after the ue resides in the third cell and recovers data communication, the third network device may send new measurement configuration information to the ue, where the new measurement configuration information still may include a previous frequency point with strong interference, that is, a frequency point of the first cell, and in order to avoid the ue switching to the first cell, when an event of A3, a4, or a5 is triggered and a measurement value is RSRQ, it may be determined whether the RSRQ of the current third cell is greater than the RSRQ of the first cell, if the RSRQ of the current third cell is greater than the RSRQ of the first cell, the measurement reporting of the event of A3, a4, or a5 is not triggered, and the ue does not need to report a measurement report to the third network device, so that the ue switching to the first cell with strong interference may be avoided. And if the current RSRQ of the third cell is larger than the RSRQ value of the first cell, normally reporting a measurement report to the third network equipment.

Therefore, by the wireless link reestablishing method, data communication can be quickly restored without increasing network load, and meanwhile, the processing of the user equipment side is simpler, and the user experience is greatly improved.

The above-mentioned parts which are not described in detail can refer to all or part of the steps of the method described in fig. 2, and are not described again here.

Fig. 6 is a schematic flow chart of another radio link reestablishment method provided in the embodiment of the present application, and the method is applied to a second network device, and specifically includes the following steps:

step 601, receiving a first request message.

The first request message is sent to the second network device when the first cell where the user equipment is currently located meets the cell switching condition.

Step 602, based on the first request message, performing radio link reestablishment between the second cell and the user equipment.

Wherein a first reply message in response to the first request message may be transmitted to the user equipment. To complete the radio link re-establishment.

The above parts not described in detail may refer to all or part of the steps of the method described in fig. 2 and fig. 4, and are not described again here.

Data interaction at the network side can refer to the existing wireless link reconstruction method, and details are not described herein.

Therefore, by the wireless link reestablishment method, when poor signals occur and cell switching fails in a strong interference environment, the wireless link can be forcibly reestablished and switched or resided in the optimal cell, and the rapid recovery of data communication is ensured.

Referring to fig. 7, a user equipment in this embodiment is described below, and fig. 7 is a schematic structural diagram of a user equipment provided in this embodiment, as shown in fig. 7, the user equipment 700 includes a processor 701, a communication interface 702, and a memory 703, where the processor, the communication interface, and the memory 703 are connected to each other, where the user equipment 700 may further include a bus 704, and the processor 701, the communication interface 702, and the memory 703 may be connected to each other by the bus 704, and the bus 704 may be a Peripheral Component Interconnect Standard (PCI) bus or an Extended Industry Standard Architecture (EISA) bus, or the like. The bus 704 may be divided into an address bus, a data bus, a control bus, and the like. For ease of illustration, only one thick line is shown in FIG. 7, but this is not intended to represent only one bus or type of bus. The memory 703 is used for storing a computer program, the computer program includes program instructions, and the processor is configured to call the program instructions to execute all or part of the method described in fig. 2, fig. 5A, and fig. 5B.

Fig. 8 is a schematic structural diagram of a network device provided in the embodiment of the present application, and as shown in fig. 8, the network device 800 includes a processor 801, a communication interface 802, and a memory 803, which are connected to each other, where the network device 800 may further include a bus 804, and the processor 801, the communication interface 802, and the memory 803 may be connected to each other by the bus 804, and the bus 804 may be a Peripheral Component Interconnect Standard (PCI) bus or an Extended Industry Standard Architecture (EISA) bus, or the like. The bus 804 may be divided into an address bus, a data bus, a control bus, and the like. For ease of illustration, only one thick line is shown in FIG. 8, but this is not intended to represent only one bus or type of bus. The memory 803 is used to store a computer program comprising program instructions that the processor is configured to call upon to perform all or part of the method described above in fig. 6. It should be noted that the network device 800 includes a first network device, a second network device, and a third network device, and the first network device, the second network device, and the third network device may be the same network device or different network devices, which is not limited herein.

The above description has introduced the solution of the embodiment of the present application mainly from the perspective of the method-side implementation process. It is understood that the user equipment and the network device, in order to implement the above functions, include corresponding hardware structures and/or software modules for performing the respective functions. Those of skill in the art will readily appreciate that the present application is capable of hardware or a combination of hardware and computer software implementing the various illustrative elements and algorithm steps described in connection with the embodiments provided 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, but such implementation decisions should not be interpreted as causing a departure from the scope of the present application.

In the embodiment of the present application, the functional units may be divided according to the above method examples, for example, each functional unit may be divided corresponding to each function, or two or more functions may be integrated into one processing unit. The integrated unit can be realized in a form of hardware, and can also be realized in a form of a software functional unit. It should be noted that the division of the unit in the embodiment of the present application is schematic, and is only a logic function division, and there may be another division manner in actual implementation.

In the case of adopting each functional module divided corresponding to each function, a radio link re-establishing apparatus in the embodiment of the present application is described below with reference to fig. 9, where fig. 9 is a block diagram of functional units of a radio link re-establishing apparatus provided in the embodiment of the present application, and is applied to a user equipment, and the radio link re-establishing apparatus 900 includes:

a first receiving unit 910, configured to receive first measurement configuration information from a first network device, where the first measurement configuration information is used to indicate a cell handover condition of a first cell in which the user equipment is currently located;

a first sending unit 920, configured to send a first request message to a second network device when the first cell meets the cell handover condition, where the first request message is used to request to perform radio link reestablishment with a second cell served by the second network device.

In the case of dividing each function module corresponding to each function, another radio link reestablishment apparatus in this embodiment is described below with reference to fig. 10, where fig. 10 is a block diagram of functional units of another radio link reestablishment apparatus provided in this embodiment, and is applied to a network device, where the radio link reestablishment apparatus 1000 includes:

a second receiving unit 1010, configured to receive a first request message, where the first request message is sent to the network device when a first cell in which the user equipment is currently located meets the cell handover condition;

a second sending unit 1020, configured to perform radio link reestablishment between the second cell and the user equipment based on the first request message.

It can be understood that, since the method embodiment and the apparatus embodiment are different presentation forms of the same technical concept, the content of the method embodiment portion in the present application should be synchronously adapted to the apparatus embodiment portion, and is not described herein again. Both the radio link re-establishment apparatus 900 and the radio link re-establishment apparatus 1000 can perform all the radio link re-establishment methods included in the above embodiments.

Embodiments of the present application also provide a computer storage medium, wherein the computer storage medium stores a computer program for electronic data exchange, and the computer program enables a computer to execute part or all of the steps of any one of the methods as described in the above method embodiments.

Embodiments of the present application also provide a computer program product comprising a non-transitory computer readable storage medium storing a computer program operable to cause a computer to perform some or all of the steps of any of the methods as described in the above method embodiments. The computer program product may be a software installation package, the computer comprising user equipment.

It should be noted that, for simplicity of description, the above-mentioned method embodiments are described as a series of acts or combination of acts, but those skilled in the art will recognize that the present application is not limited by the order of acts described, as some steps may occur in other orders or concurrently depending on the application. Further, those skilled in the art should also appreciate that the embodiments described in the specification are preferred embodiments and that the acts and modules referred to are not necessarily required in this application.

In the foregoing embodiments, the descriptions of the respective embodiments have respective emphasis, and for parts that are not described in detail in a certain embodiment, reference may be made to related descriptions of other embodiments.

In the embodiments provided in the present application, it should be understood that the disclosed apparatus may be implemented in other manners. For example, the above-described embodiments of the apparatus are merely illustrative, and for example, the above-described division of the units is only one type of division of logical functions, and other divisions may be realized in practice, for example, a plurality of units or components may be combined or integrated into another system, or some features may be omitted, or not executed. In addition, the shown or discussed mutual coupling or direct coupling or communication connection may be an indirect coupling or communication connection of some interfaces, devices or units, and may be an electric or other form.

The units described as separate parts may or may not be physically separate, and parts displayed as units may or may not be physical units, may be located in one place, or may be distributed on a plurality of network units. Some or all of the units can be selected according to actual needs to achieve the purpose of the solution of the embodiment.

In addition, functional units in the embodiments of the present application may be integrated into one processing unit, or each unit may exist alone physically, or two or more units are integrated into one unit. The integrated unit can be realized in a form of hardware, and can also be realized in a form of a software functional unit.

The integrated unit may be stored in a computer readable memory if it is implemented in the form of a software functional unit and sold or used as a stand-alone product. Based on such understanding, the technical solution of the present application may be substantially implemented or a part of or all or part of the technical solution contributing to the prior art may be embodied in the form of a software product stored in a memory, and including several instructions for causing a computer device (which may be a personal computer, a server, or a network device) to execute all or part of the steps of the above-mentioned method of the embodiments of the present application. And the aforementioned memory comprises: a U-disk, a Read-Only Memory (ROM), a Random Access Memory (RAM), a removable hard disk, a magnetic or optical disk, and other various media capable of storing program codes.

Those skilled in the art will appreciate that all or part of the steps in the methods of the above embodiments may be implemented by associated hardware instructed by a program, which may be stored in a computer-readable memory, which may include: flash Memory disks, Read-Only memories (ROMs), Random Access Memories (RAMs), magnetic or optical disks, and the like.

The foregoing detailed description of the embodiments of the present application has been presented to illustrate the principles and implementations of the present application, and the above description of the embodiments is only provided to help understand the method and the core concept of the present application; meanwhile, for a person skilled in the art, according to the idea of the present application, there may be variations in the specific embodiments and the application scope, and in summary, the content of the present specification should not be construed as a limitation to the present application.

Claims

1. A method for reestablishing a radio link, applied to a user equipment, includes:

2. The method of claim 1, wherein the sending a first request message to a second network device when the cell handover condition is satisfied by a first cell in which the first network device is currently located comprises:

transmitting a first measurement report to the first network device, the first measurement report including a first reference signal received power value of the first cell;

and when a cell switching instruction from the first network equipment is not received and a first measurement value of the first cell is continuously smaller than a first threshold value within a preset time length, sending the first request message to the second network equipment, wherein the first measurement value is used for indicating the signal quality of the first cell.

3. The method of claim 2, wherein after sending the first measurement report to the first network device, the method further comprises:

and when the cell switching instruction from the first network equipment is not received and the first measurement value is not continuously smaller than the first threshold value within a preset time length, not sending the first request message to the second network equipment.

4. The method of claim 2 or 3, wherein the first measurement value comprises:

at least one of a first reference signal received power, a first reference signal received quality, and a first signal to interference plus noise ratio in the first cell.

5. The method according to any of claims 1-4, wherein the second cell is a candidate cell for which the second measurement value is greater than the second threshold and the reference signal received power is highest.

6. The method of claim 1, wherein after sending the first request message to the second network device, the method further comprises:

switching from the first cell to the second cell upon receiving a first reply message in response to the first request message; or the like, or, alternatively,

and when the first response message is not received, residing in a third cell, wherein the third cell is any candidate cell with reference signal quality larger than a third threshold value.

7. The method of claim 6, wherein the second cell and the third cell are derived based on a candidate cell sequence, and wherein:

the candidate cell sequence comprises a first priority subset, a second priority subset and a third priority subset, the first priority subset comprises candidate cells with reference signal quality larger than the second threshold, the second priority subset comprises candidate cells with reference signal quality larger than the third threshold and smaller than or equal to the second threshold, the third priority subset comprises candidate cells with reference signal quality smaller than or equal to the third threshold, and the candidate cells in the first priority subset, the second priority subset and the third priority subset are arranged in the order of the reference signal receiving power from large to small.

8. The method of claim 6, wherein after the camping on to the third cell, the method further comprises:

receiving second measurement configuration information sent by a third network device, where the second measurement configuration information is used to indicate a cell switching condition of the third cell;

and when the third measurement value of the third cell meets the cell switching condition and is greater than the first threshold value, not reporting a third measurement report to the third network equipment.

9. The method according to claim 8, wherein after receiving the second measurement configuration information sent by the third network device, the method further comprises

And reporting the third measurement report to the third network device when the third measurement value of the third cell meets the cell switching condition and is less than or equal to the first threshold value.

10. A method for reestablishing a wireless link, the method being applied to a network device and comprising:

11. The method of claim 10, wherein performing the radio link re-establishment between the second cell and the ue based on the first request message comprises:

transmitting a first reply message to the user equipment in response to the first request message.

12. An apparatus for reestablishing a radio link, the apparatus being applied to a user equipment, the apparatus comprising:

13. An apparatus for reestablishing a wireless link, the apparatus being applied to a network device, the apparatus comprising:

14. A user device comprising a processor, a memory, and one or more programs stored in the memory and configured for execution by the application processor, the programs including instructions for performing the steps in the method of any of claims 1-9.

15. A network device comprising a processor, a memory, and one or more programs stored in the memory and configured for execution by the application processor, the programs including instructions for performing the steps in the method of claim 10 or 11.

16. A computer storage medium, characterized in that the computer storage medium stores a computer program comprising program instructions that, when executed by a processor, cause the processor to perform the method of any of claims 1 to 9 or the method of claim 10 or 11.