CN112911663B - Cell switching method and device, terminal equipment and storage medium - Google Patents
Cell switching method and device, terminal equipment and storage medium Download PDFInfo
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- CN112911663B CN112911663B CN202110147219.4A CN202110147219A CN112911663B CN 112911663 B CN112911663 B CN 112911663B CN 202110147219 A CN202110147219 A CN 202110147219A CN 112911663 B CN112911663 B CN 112911663B
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W36/00—Hand-off or reselection arrangements
- H04W36/0005—Control or signalling for completing the hand-off
- H04W36/0055—Transmission or use of information for re-establishing the radio link
- H04W36/0061—Transmission or use of information for re-establishing the radio link of neighbour cell information
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W36/00—Hand-off or reselection arrangements
- H04W36/24—Reselection being triggered by specific parameters
- H04W36/30—Reselection being triggered by specific parameters by measured or perceived connection quality data
Abstract
A cell switching method and device, terminal equipment and storage medium are provided, the method is applied to the terminal equipment, and the method comprises the following steps: when the terminal equipment is in a same frequency interference scene, measuring a pilot frequency cell different from a communication frequency band of a resident cell of the terminal equipment, and determining a target pilot frequency cell, wherein a signal-to-noise ratio parameter corresponding to the target pilot frequency cell is greater than a signal-to-noise ratio parameter corresponding to the resident cell, and the same frequency interference scene is a scene of mutual interference between the resident cell and the same frequency cell with the same communication frequency band; and switching the terminal equipment from the resident cell to the target pilot frequency cell. By implementing the embodiment of the application, the terminal equipment can be switched from the resident cell with co-frequency interference to the pilot frequency cell, so that the actual communication quality of the terminal equipment is improved.
Description
Technical Field
The present application relates to the field of communications technologies, and in particular, to a cell switching method and apparatus, a terminal device, and a storage medium.
Background
Currently, terminal devices (such as mobile phones, tablet computers, smart wearable devices, and the like) often rely on a cell during communication, that is, reliable communication is achieved through access devices such as base stations in the cell. However, in practice, it is found that the base station in a cell often needs to operate at a certain fixed frequency, and when there is an interference source with the same frequency near the cell, the communication of the terminal device is subjected to co-channel interference, which greatly reduces the actual communication quality of the terminal device.
Disclosure of Invention
The embodiment of the application discloses a cell switching method and device, terminal equipment and a storage medium, which can realize switching of the terminal equipment from a resident cell with same frequency interference to a pilot frequency cell, thereby improving the actual communication quality of the terminal equipment.
A first aspect of an embodiment of the present application discloses a cell switching method, which is applied to a terminal device, and the method includes:
when the terminal equipment is in a same-frequency interference scene, measuring a pilot frequency cell different from a communication frequency band of a resident cell of the terminal equipment, and determining a target pilot frequency cell, wherein a signal-to-noise ratio parameter corresponding to the target pilot frequency cell is larger than a signal-to-noise ratio parameter corresponding to the resident cell, and the same-frequency interference scene is a scene in which the resident cell and the same-frequency cell with the communication frequency band interfere with each other;
and switching the terminal equipment from the resident cell to the target pilot frequency cell.
A second aspect of the embodiments of the present application discloses a cell switching apparatus, which is applied to a terminal device, and the cell switching apparatus includes:
the measurement unit is used for measuring a pilot frequency cell different from a communication frequency band of a resident cell of the terminal equipment when the terminal equipment is in a same frequency interference scene, and determining a target pilot frequency cell, wherein a signal-to-noise ratio parameter corresponding to the target pilot frequency cell is larger than a signal-to-noise ratio parameter corresponding to the resident cell, and the same frequency interference scene is a scene of mutual interference between the resident cell and the same frequency cell with the same communication frequency band;
and the switching unit is used for switching the terminal equipment from the resident cell to the target pilot frequency cell.
A third aspect of the embodiments of the present application discloses a terminal device, a memory and a processor, where the memory stores a computer program, and when the computer program is executed by the processor, the processor is enabled to implement all or part of the steps in any one of the cell handover methods disclosed in the first aspect of the embodiments of the present application.
A fourth aspect of embodiments of the present application discloses a computer-readable storage medium, on which a computer program is stored, where the computer program, when executed by a processor, implements all or part of steps in any one of the cell handover methods disclosed in the first aspect of embodiments of the present application.
Compared with the related art, the embodiment of the application has the following beneficial effects:
in the embodiment of the application, when a terminal device is in a same-frequency interference scene, the terminal device may measure a different-frequency cell different from a communication frequency band of a resident cell of the terminal device to determine a target different-frequency cell, wherein a signal-to-noise ratio parameter corresponding to the target different-frequency cell is greater than a signal-to-noise ratio parameter corresponding to the resident cell, and the same-frequency interference scene is a scene in which the resident cell and the same-frequency cell having the same communication frequency band interfere with each other. On the basis, the terminal equipment can be switched to the target inter-frequency cell from the resident cell. Therefore, by implementing the embodiment of the application, the terminal equipment can obtain the pilot frequency cell with better signal-to-noise ratio parameter through measurement when the terminal equipment is subjected to the same frequency interference, and then the terminal equipment is switched from the resident cell with the same frequency interference to the pilot frequency cell, so that the situation that the terminal equipment cannot actively switch the cell in the same frequency interference scene is avoided, the communication quality is poor, and the actual communication quality of the terminal equipment is favorably improved.
Drawings
In order to more clearly illustrate the technical solutions in the embodiments of the present application, the drawings needed to be used in the embodiments will be briefly described below, and it is obvious that the drawings in the following description are only some embodiments of the present application, and it is obvious for those skilled in the art that other drawings can be obtained according to the drawings without creative efforts.
Fig. 1 is a schematic view of an application scenario of a cell switching method disclosed in an embodiment of the present application;
fig. 2 is a schematic diagram of a cellular network disclosed in an embodiment of the present application;
fig. 3 is a schematic diagram of a same frequency interference scenario disclosed in an embodiment of the present application;
fig. 4 is a flowchart illustrating a cell handover method according to an embodiment of the present application;
fig. 5 is a flowchart illustrating another cell handover method disclosed in the embodiment of the present application;
fig. 6 is a flowchart illustrating another cell handover method disclosed in the embodiment of the present application;
fig. 7 is a schematic block diagram of a cell switching apparatus according to an embodiment of the present application;
fig. 8 is a schematic block diagram of a terminal device disclosed in an embodiment of the present application.
Detailed Description
The technical solutions in the embodiments of the present application will be described clearly and completely 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.
It should be noted that the terms "comprises" and "comprising," and any variations thereof, in the embodiments of the present application, are intended to cover a non-exclusive inclusion, such that a process, method, system, article, or apparatus that comprises a list of steps or elements is not necessarily limited to those steps or elements expressly listed, but may include other steps or elements not expressly listed or inherent to such process, method, article, or apparatus.
The embodiment of the application discloses a cell switching method and device, terminal equipment and a storage medium, which can realize switching of the terminal equipment from a resident cell with same frequency interference to a pilot frequency cell, thereby improving the actual communication quality of the terminal equipment.
The following detailed description is made with reference to the accompanying drawings.
Referring to fig. 1, fig. 1 is a schematic application scenario diagram of a cell handover method disclosed in an embodiment of the present application, and includes a terminal device 100 and a network device 200. The terminal device 100 may be in a range radiated by a communication signal of the network device 200, that is, in a cell 201 corresponding to the network device 200, and establish a communication connection with the network device 200 based on a cellular mobile communication technology. Referring to fig. 2, fig. 2 is a schematic diagram of a cellular network according to an embodiment of the present disclosure. As shown in fig. 2, a cellular network may include a plurality of network devices 200, and each network device 200 may respectively correspond to a cell 201 whose center is located, and the cells 201 corresponding to adjacent network devices 200 are adjacent to each other, and may also overlap or partially overlap each other, so as to form a cellular (or mesh) wireless communication network structure. On this basis, the terminal device 100 in the cellular network may be simultaneously located in the cells 201 corresponding to the plurality of network devices 200, and may switch from the currently camped first cell 201a to the second cell 201b as needed (e.g., based on communication quality, communication delay, antenna directivity, etc.), thereby switching from connecting with the first network device 200a to connecting with the second network device 200 b. It will be appreciated that each network device 200 may also access multiple terminal devices 100 in its cell 201 simultaneously, so that communication connections may be established with multiple terminal devices 100 simultaneously.
For each network device 200 in the cellular network, it may radiate a communication signal in a certain communication frequency band, that is, a cell 201 corresponding to the network device 200 may cover the communication signal in the communication frequency band. Alternatively, the communication frequency band of the communication signal radiated by the network device 200 may be fixed or may change according to a certain rule. As shown in fig. 3, if a communication frequency band corresponding to a first cell (i.e., a camping cell) 201a in which the terminal device 100 currently camps is [ α, β ], and a cell that coincides or partially coincides with the communication frequency band exists in a neighboring cell of the terminal device, a communication signal between the terminal device 100 and the camping cell is easily interfered by a co-channel signal of the neighboring cell. For example, if the communication frequency band corresponding to the third cell 201c is [ χ, δ ], when the communication frequency band [ α, β ] corresponding to the first cell 201a and the communication frequency band corresponding to the third cell 201c are [ χ, δ ] or partially overlap, the terminal devices 100 in the first cell 201a and the third cell 201c will be in the same-frequency interference scenario. In a co-channel interference scenario, communication Quality parameters of the terminal device 100, such as RSRP (Reference Signal Receiving Power), RSRQ (Reference Signal Receiving Quality), etc., may be better, but Signal-to-Noise Ratio (SNR) of the terminal device 100 is worse, which causes actual communication Quality of the terminal device 100 to be greatly degraded.
In this embodiment, when the terminal device 100 is in a same-frequency interference scenario, the terminal device 100 may measure a different-frequency cell different from a communication frequency band of a resident cell of the terminal device 100, and determine a target different-frequency cell, where a signal-to-noise ratio parameter corresponding to the target different-frequency cell should be greater than a signal-to-noise ratio parameter corresponding to the resident cell, and then the terminal device 100 may switch the terminal device from the resident cell to the target different-frequency cell. Illustratively, if the terminal device 100 is simultaneously located in the first cell 201a, the second cell 201b, and the third cell 201c, when the communication frequency band [ α, β ] corresponding to the first cell 201a and the communication frequency band [ χ, δ ] corresponding to the third cell 201c are overlapped or partially overlapped, the terminal device 100 is in the same-frequency interference scenario. At this time, if the communication quality parameter of the third cell 201c is better and the terminal device 100 cannot be triggered to switch the cell, the terminal device 100 in the connected state cannot actively switch the cell in the same frequency interference scenario, thereby causing the actual communication quality to be degraded. In order to solve the above problem, the terminal device 100 may measure the snr parameters of the different inter-frequency cells from the communication frequency band [ α, β ], and determine the second cell 201b with a better snr as the target inter-frequency cell, and then may switch the terminal device 100 from the first cell 201a to the second cell 201b, so that the terminal device 100 may establish a communication connection with the second cell 201b, thereby improving the actual communication quality of the terminal device.
For example, the terminal device 100 may include various devices or systems having a communication function, such as a mobile phone, a smart wearable device, an in-vehicle terminal, a tablet Computer, a PC (Personal Computer), a PDA (Personal Digital Assistant), and the like, and is not particularly limited in the embodiment of the present application. The network device 200 may include network devices such as a base station based on various generations of mobile communication technologies, for example, an LTE (Long Term Evolution) base station, an NR (New Radio) base station, and the like.
Referring to fig. 4, fig. 4 is a schematic flowchart of a cell switching method disclosed in an embodiment of the present application, where the cell switching method may be applied to the terminal device. As shown in fig. 4, the cell switching method may include the following steps:
402. when the terminal equipment is in a same frequency interference scene, measuring a pilot frequency cell different from a communication frequency band of a resident cell of the terminal equipment, and determining a target pilot frequency cell, wherein a signal-to-noise ratio parameter corresponding to the target pilot frequency cell is greater than a signal-to-noise ratio parameter corresponding to the resident cell, and the same frequency interference scene is a scene of mutual interference between the resident cell and the same frequency cell with the communication frequency band.
In the embodiment of the application, the terminal device may first determine whether the terminal device is in a co-channel interference scenario, and when the terminal device is determined to be in the co-channel interference scenario, the terminal device may measure the neighboring cell. The camping cell of the terminal device refers to a cell in which the terminal device currently camps, and may exemplarily include a cell that corresponds to a network device currently establishing a communication connection with the terminal device and satisfies S criteria (received power Srxlev > 0dB in cell search). In an embodiment, because the received power Srxlev in the cell search is in a positive correlation with the communication quality parameter (such as RSRP, RSRQ, etc.) corresponding to the cell, and the communication quality parameter corresponding to the cell where the terminal device resides is generally better, it may be determined that the terminal device is in the same-frequency interference scenario when it is detected that the communication quality parameter corresponding to the cell where the terminal device resides is higher than the communication quality threshold (such as 0.5dB, 1dB, etc.) and the actual communication quality of the terminal device is worse (such as low signal-to-noise ratio, large delay, etc.). In another embodiment, the terminal device may also send a co-channel interference confirmation request to the network device of the cell where the terminal device resides, and directly determine whether the terminal device is in the co-channel interference scene according to the confirmation information fed back by the network device for the co-channel interference confirmation request.
When the terminal equipment is in a same-frequency interference scene, the terminal equipment can respectively measure at least one pilot frequency cell with different communication frequency bands in the adjacent cell of the terminal equipment so as to obtain a signal-to-noise ratio parameter corresponding to each pilot frequency cell, and a target pilot frequency cell is determined from the at least one pilot frequency cell according to the signal-to-noise ratio parameter. The communication frequency band of the pilot frequency cell is different from that of the resident cell, and may include that the center frequency points of the pilot frequency cell are different from that of the resident cell, or may include that the communication frequency bands of the pilot frequency cell and the resident cell are not completely overlapped or are not completely overlapped. The terminal equipment can acquire the communication frequency band of each cell where the terminal equipment is located according to the search result of cell search in advance, and further acquire at least one pilot frequency cell different from the communication frequency band of the resident cell; the pilot frequency measurement can also be initiated, and the operating frequency of the terminal device is periodically changed to measure whether a pilot frequency cell which can be resided and a signal-to-noise ratio parameter corresponding to the pilot frequency cell exist.
On this basis, the terminal device may determine, as the target inter-frequency cell, the inter-frequency cell in which the signal-to-noise ratio parameter is the largest and the signal-to-noise ratio parameter is greater than the signal-to-noise ratio parameter of the camping cell in the at least one inter-frequency cell. For example, if the snr parameters respectively corresponding to the pilot frequency cells A, B, C, D measured by the terminal device are a, b, c, and d, the terminal device may first arrange the snr parameters in descending order (for example, order b, c, d, and a), and then may obtain the largest snr parameter (for example, snr parameter b) and compare the largest snr parameter with the snr parameter of the camping cell. If the result of the comparison is that the maximum snr parameter is greater than the snr parameter of the camped cell, the terminal device may determine the pilot cell (for example, pilot cell B) corresponding to the maximum snr parameter as the target pilot cell, and then may switch the terminal device from the camped cell to the target pilot cell in the following step.
In an embodiment, for cells with the same communication frequency band in the inter-frequency cell obtained by measurement, the terminal device may only reserve the signal-to-noise ratio parameter corresponding to the inter-frequency cell with the largest signal-to-noise ratio parameter in each communication frequency band after sorting the signal-to-noise ratio parameters. For example, if the communication frequency bands of the inter-frequency cells a and C are the same, and the communication frequency bands of B and D are the same, the terminal device may eliminate, for each communication frequency band, other signal-to-noise ratio parameters (for example, the signal-to-noise ratio parameters are ordered as B, C, D, a) except for the largest signal-to-noise ratio parameter after arranging the signal-to-noise ratio parameters in the descending order (for example, ordering as B, D, a), so that the problem that the terminal device still has co-frequency interference after being switched to the target inter-frequency cell may be avoided.
By implementing the method, the terminal equipment can obtain the target pilot frequency cell with better signal-to-noise ratio parameters by measurement when the terminal equipment is subjected to the same frequency interference. Because the same frequency interference mainly originates from the same frequency cell with the communication frequency band of the resident cell, after the terminal equipment is switched to the target different frequency cell, the negative influence caused by the same frequency interference can be eliminated, and the actual communication quality of the terminal equipment is improved.
404. And switching the terminal equipment from the resident cell to the target pilot frequency cell.
In the embodiment of the present application, after determining a target inter-frequency cell to be switched, a terminal device may actively trigger a cell switching event, and switch the terminal device from a current resident cell to the target inter-frequency cell. Exemplarily, when the terminal device is in a connected state, the co-channel interference cannot directly reduce communication quality parameters (such as RSRP, RSRQ, and the like) corresponding to its camped cell, that is, cell handover events (such as an A2 handover event triggered when the RSRP of the camped cell is lower than a certain threshold, an A5 handover event triggered when the RSRP of the camped cell is lower than a certain threshold and the RSRP of an adjacent cell is higher than a certain threshold, and the like) of the terminal device cannot be triggered. At this time, the terminal device can actively trigger a cell switching event, disconnect the communication connection with the communication device in the resident cell, and establish the communication connection with the communication device in the target pilot frequency cell, i.e., implement pilot frequency hard switching, so as to eliminate co-channel interference and improve the actual communication quality of the terminal device.
It can be seen that, with the cell switching method described in the foregoing embodiment, when the terminal device is subjected to co-channel interference, the different-frequency cell with a better signal-to-noise ratio parameter is obtained through measurement, and then the terminal device is switched from a resident cell with co-channel interference to the different-frequency cell, so as to avoid that the terminal device in a connected state cannot actively switch the cell in a co-channel interference scene, thereby resulting in a situation of poor communication quality, and being beneficial to improving the actual communication quality of the terminal device.
Referring to fig. 5, fig. 5 is a flowchart illustrating another cell switching method disclosed in an embodiment of the present application, where the cell switching method may be applied to the terminal device. As shown in fig. 5, the cell switching method may include the following steps:
502. and detecting communication quality parameters and signal-to-noise ratio parameters corresponding to the resident cell of the terminal equipment.
Illustratively, the communication quality parameter may include RSRP, RSRQ, RSSI (Received Signal Strength Indicator), and the like, which are used to describe communication Signal quality of the terminal device communicating with the network device in the camping cell. The snr parameter may be calculated by using a ratio (e.g., an effective power ratio, a level-to-amplitude ratio, etc.) between a desired signal and a noise signal, and is used to measure a noise interference level in the communication signal.
In this embodiment, the terminal device may communicate with the network device in the residential cell through the terminal device, and in this process, detect a communication quality parameter and a signal-to-noise ratio parameter corresponding to the residential cell. Optionally, the terminal device may detect the communication quality parameter and the snr parameter periodically (e.g., every 10 seconds, every 30 seconds, etc.), or may trigger to detect the communication quality parameter and the snr parameter under a certain condition (e.g., when the terminal device determines to camp on a cell, when the terminal device detects that the network delay is higher than the delay threshold, etc.).
504. And if the communication quality parameter is not lower than the communication quality threshold and the signal-to-noise ratio parameter is smaller than the signal-to-noise ratio threshold, determining that the terminal equipment is in a same frequency interference scene.
In the embodiment of the application, after detecting and obtaining the communication quality parameter and the signal-to-noise ratio parameter corresponding to the resident cell of the terminal device, the terminal device may respectively perform threshold comparison on the communication quality parameter and the signal-to-noise ratio parameter, and determine whether the terminal device is in a same frequency interference scene according to a threshold comparison result. For example, the terminal device may first determine whether the communication quality parameter is not lower than a communication quality threshold (e.g., 0.5dB, 1dB, etc.), and when it is determined that the communication quality parameter is lower than the communication quality threshold, then determine whether the signal-to-noise ratio parameter is smaller than a signal-to-noise ratio threshold (e.g., 0dB, 50dB, etc.); or judging whether the signal-to-noise ratio parameter is smaller than a signal-to-noise ratio threshold value, and judging whether the communication quality parameter is not lower than the communication quality threshold value when the signal-to-noise ratio parameter is smaller than the signal-to-noise ratio threshold value.
When the terminal device determines that the communication quality parameter is not lower than the communication quality threshold, it indicates that the communication quality parameter is better, and the terminal device should have good actual communication quality in general. However, when the terminal device simultaneously determines that the signal-to-noise ratio parameter is smaller than the signal-to-noise ratio threshold, it may be determined that the terminal device is greatly interfered in the residential cell, and at this time, it may be determined that the terminal device is most likely in a co-channel interference scenario. It can be understood that, by means of the threshold comparison, it cannot be determined that the terminal device is in the same frequency interference scenario completely without error, but under limited overhead, the method can achieve higher accuracy, and simultaneously saves resource overhead as much as possible, and improves the efficiency of determining that the terminal device is in the same frequency interference scenario.
As an optional implementation manner, the terminal device may further obtain a data transmission delay corresponding to the terminal device in the resident cell. The data Transmission delay may include a delay detected by the terminal device in a process of establishing a network connection, such as a TCP (Transmission Control Protocol) connection, an HTTP (Hypertext Transfer Protocol) connection, or the like, or may include a delay detected by the terminal device in a process of continuously transmitting data.
For example, the data transmission delay may be obtained by unpacking and analyzing an application layer packet transmitted by the terminal device in a network communication process. Specifically, for example, for application layer data packets such as a TCP data packet and a DNS (Domain Name System) data packet, the terminal device may directly obtain timestamp data of the application layer data packet after obtaining the application layer data packet, and determine a time delay of transmitting the application layer data packet to the terminal device according to the timestamp data.
On this basis, the terminal device may use the data transmission delay, the communication quality parameter and the signal-to-noise ratio parameter corresponding to the resident cell together as a determination condition for determining whether the terminal device is in the same frequency interference scenario. Exemplarily, the terminal device may determine that the terminal device is in a co-channel interference scenario when it is determined that the communication quality parameter is not lower than the communication quality threshold, the signal-to-noise ratio parameter is smaller than the signal-to-noise ratio threshold, and the data transmission delay exceeds the delay threshold. The delay threshold may include a duration threshold (e.g., 100 milliseconds, 120 milliseconds, etc.), that is, it is determined whether the data transmission delay exceeds the duration threshold; or may include a time length threshold and a time threshold (e.g., 5 times, 10 times, etc.), that is, it is determined whether the number of times that the data transmission delay exceeds the time length threshold within a certain time length (e.g., 15 seconds, 30 seconds, etc.) exceeds the time threshold. Due to the fact that the terminal device is prone to packet loss in the same frequency interference scene, time delay of transmission of the application layer data packet is increased, the increased data transmission time delay serves as a judgment basis for determining whether the terminal device is in the same frequency interference scene, accuracy of judgment of the same frequency interference scene is improved, and actual communication quality of the terminal device is improved adaptively.
506. When the terminal equipment is in a same-frequency interference scene, different-frequency cells different from the communication frequency band of the resident cell of the terminal equipment are measured, and signal-to-noise ratio parameters corresponding to each different-frequency cell are respectively obtained.
Wherein step 506 is similar to step 402 described above.
It should be noted that the above measurement process may be actively triggered by the terminal device. Specifically, when determining that the terminal device is in a co-channel interference scenario, the terminal device may actively adjust the communication quality parameter to a communication quality target value, where the communication quality target value is lower than the communication quality threshold. Therefore, the terminal device may trigger a first cell handover event of the terminal device (i.e., an A2 handover event triggered when RSRP of the camped cell is lower than a certain threshold), so as to handover the terminal device from the camped cell to an inter-frequency cell different from a communication frequency band of the camped cell. When the first cell handover event is triggered, the terminal device may first trigger the inter-frequency measurement, that is, measure the inter-frequency cell different from the communication frequency band of the cell where the terminal device resides, and obtain the snr parameter corresponding to each inter-frequency cell. Therefore, by implementing the method, the communication quality parameter corresponding to the resident cell is actively adjusted, the terminal device can trigger the pilot frequency detection, and the first cell switching event can be realized according to the pilot frequency detection result.
508. And generating a measurement report according to the signal-to-noise ratio parameter corresponding to each pilot frequency cell, and reporting the measurement report to network equipment.
Specifically, the terminal device may sequentially list the identification code corresponding to each pilot frequency cell and the corresponding signal-to-noise ratio parameter in the generated measurement report, so that the network device determines, according to the measurement report, the pilot frequency cell having the largest signal-to-noise ratio parameter and the signal-to-noise ratio parameter of which is greater than the signal-to-noise ratio parameter of the camped cell, as the target pilot frequency cell. In an embodiment, the terminal device may record, in the measurement report, the signal-to-noise ratio parameter corresponding to each inter-frequency cell, so that the network device determines, according to the measurement report, a target inter-frequency cell from at least one inter-frequency cell. In another embodiment, the terminal device may also perform preliminary screening on the signal-to-noise ratio parameter corresponding to the pilot frequency cell locally at the terminal device to obtain a part of pilot frequency cells with signal-to-noise ratio parameters larger than those of the resident cell, and generate a measurement report according to the signal-to-noise ratio parameters corresponding to the part of pilot frequency cells, so that the calculation amount of the network device in analyzing the measurement report can be reduced, and the efficiency of determining the target pilot frequency cell can be improved.
510. And acquiring a target pilot frequency cell fed back by the network equipment according to the measurement report, wherein the signal-to-noise ratio parameter corresponding to the target pilot frequency cell is greater than the signal-to-noise ratio parameter corresponding to the resident cell.
In this embodiment, after sending the measurement report to the network device, the terminal device may obtain a cell handover indication fed back by the network device, where the cell handover indication may include at least a target inter-frequency cell determined by the network device according to the measurement report. On this basis, the terminal device can switch the terminal device from the resident cell to the target different-frequency cell in the subsequent steps, so that the first cell switching event can be completed, the negative influence caused by same-frequency interference is eliminated, and the actual communication quality of the terminal device is improved.
512. And switching the terminal equipment from the resident cell to the target pilot frequency cell.
Step 512 is similar to step 404, and is not described herein again.
Therefore, by implementing the cell switching method described in the above embodiment, the terminal device can be switched from the resident cell with co-frequency interference to the different-frequency cell, so as to improve the actual communication quality of the terminal device; in addition, by detecting the communication quality parameters, signal-to-noise ratio parameters, data transmission delay and other parameters corresponding to the resident cell and performing threshold judgment, the accuracy of the judgment of the same-frequency interference scene can be improved as much as possible by using limited overhead; by generating the measurement report and reporting the measurement report to the network equipment, the cell switching event can be actively and timely triggered, which is beneficial to improving the efficiency of determining the target pilot frequency cell and performing subsequent cell switching.
Referring to fig. 6, fig. 6 is a flowchart illustrating another cell switching method disclosed in the embodiment of the present application, where the cell switching method can be applied to the terminal device. As shown in fig. 6, the cell switching method may include the following steps:
602. and detecting communication quality parameters and signal-to-noise ratio parameters corresponding to the resident cell of the terminal equipment.
Step 602 is similar to step 502 described above, and is not described here again.
604. And acquiring the corresponding data transmission delay of the terminal equipment in the resident cell.
606. And if the communication quality parameter is not lower than the communication quality threshold, the signal-to-noise ratio parameter is smaller than the signal-to-noise ratio threshold, and the data transmission delay exceeds the delay threshold, determining that the terminal equipment is in the same frequency interference scene.
Step 604 and step 606 are similar to step 504 described above. It should be noted that, by increasing the data transmission delay as a criterion for determining whether the terminal device is in the same frequency interference scenario, it is beneficial to improve the accuracy of the same frequency interference scenario determination, so as to adaptively improve the actual communication quality of the terminal device.
608. And adjusting the communication quality parameter to a communication quality target value, which is lower than the communication quality threshold.
By actively adjusting the communication quality parameters corresponding to the resident cell, the terminal device can actively trigger the subsequent pilot frequency detection step by using the trigger condition of the switching event in the conventional network, and further can realize cell switching according to the pilot frequency detection result.
610. And measuring different-frequency cells different from the communication frequency band of the resident cell of the terminal equipment to respectively obtain the signal-to-noise ratio parameter corresponding to each different-frequency cell.
612. And generating a measurement report according to the signal-to-noise ratio parameter corresponding to each pilot frequency cell, and reporting the measurement report to network equipment.
614. And acquiring a target pilot frequency cell fed back by the network equipment according to the measurement report, wherein the signal-to-noise ratio parameter corresponding to the target pilot frequency cell is greater than the signal-to-noise ratio parameter corresponding to the resident cell.
616. And switching the terminal equipment from the resident cell to the target pilot frequency cell.
Step 616 is similar to step 404, and is not described here again.
618. And refusing to respond to a second cell switching event of the terminal equipment within the first time length, wherein the second cell switching event is an event of switching the terminal equipment from the target different-frequency cell to a same-frequency cell with the same communication frequency band as the resident cell.
In this embodiment, after the terminal device is handed over from the camping cell to the target inter-frequency cell, in order to avoid a situation of "ping-pong handover" that the terminal device is handed over from the target inter-frequency cell back to the camping cell again because the communication quality parameter of the camping cell is still superior, the terminal device may prohibit the terminal device from performing the cell handover for a certain period of time. Specifically, the terminal device may refuse to respond to a cell switching event for switching the terminal device to a co-frequency cell having the same communication frequency band as the above-mentioned camping cell within a first time period (e.g., 5 minutes, 10 minutes, etc.). Alternatively, the terminal device may only refuse to respond to the handover of the terminal device back to the camped cell.
In one embodiment, when the terminal device refuses to respond to the second cell handover event, the terminal device may first obtain a measurement result of measuring a neighboring cell of the terminal device within a first time duration; if the adjacent cell is detected to include a co-frequency cell with the same communication frequency band as the resident cell, the terminal device can mark a target measurement result corresponding to the co-frequency cell in the measurement results; on this basis, the terminal device may refuse to report the marked target measurement result to the network device when the marked target measurement result triggers a second cell handover event in which the terminal device performs cell handover, so as to refuse to respond to the second cell handover event.
By implementing the method, the terminal equipment can refuse to switch back to the original resident cell and the same-frequency cell from the target different-frequency cell, thereby avoiding the ping-pong switching situation and effectively improving the effectiveness and reliability of cell switching.
Therefore, by implementing the cell switching method described in the above embodiment, the terminal device can be switched from the resident cell with co-frequency interference to the different-frequency cell, so as to improve the actual communication quality of the terminal device; in addition, the terminal equipment is refused to be switched back to the original resident cell and the same-frequency cell from the target different-frequency cell within a certain time, so that the condition that the terminal equipment is switched in a ping-pong manner can be avoided, and the effectiveness of cell switching is ensured.
Referring to fig. 7, fig. 7 is a schematic block diagram of a cell switching apparatus according to an embodiment of the present disclosure, where the cell switching apparatus can be applied to the terminal device. As shown in fig. 7, the cell switching apparatus may include a measurement unit 701 and a switching unit 702, wherein:
a measuring unit 701, configured to measure, when a terminal device is in a co-channel interference scenario, a pilot cell different from a communication frequency band of a residential cell of the terminal device, and determine a target pilot cell, where a signal-to-noise ratio parameter corresponding to the target pilot cell is greater than a signal-to-noise ratio parameter corresponding to the residential cell, and the co-channel interference scenario is a scenario in which the residential cell and the co-channel cell having the same communication frequency band interfere with each other;
a switching unit 702, configured to switch the terminal device from the camping cell to the target inter-frequency cell.
It can be seen that, by using the cell switching device described in the above embodiment, when receiving co-channel interference, the terminal device can obtain the pilot frequency cell with better signal-to-noise ratio parameters through measurement, and then switch the terminal device from the resident cell with co-channel interference to the pilot frequency cell, so as to avoid that the terminal device in a connected state cannot actively switch the cell in a co-channel interference scene, thereby resulting in a situation of poor communication quality, and being beneficial to improving the actual communication quality of the terminal device.
In one embodiment, the cell switching apparatus may further include a parameter detecting unit and a scene determining unit, not shown in the figure, wherein:
a parameter detection unit, configured to detect a communication quality parameter and a signal-to-noise ratio parameter corresponding to a cell in which the terminal device resides before the measurement unit 701 measures a different pilot cell different from a communication frequency band of the cell in which the terminal device resides and determines a target pilot cell;
and the scene determining unit is used for determining that the terminal equipment is in a same frequency interference scene when the communication quality parameter is not lower than the communication quality threshold and the signal-to-noise ratio parameter is smaller than the signal-to-noise ratio threshold.
In an embodiment, the cell switching apparatus may further include a delay detection unit, not shown in the figure, where the delay detection unit may be configured to obtain a data transmission delay corresponding to the terminal device in the resident cell;
the scene determining unit may be specifically configured to determine that the terminal device is in a co-channel interference scene when the communication quality parameter is not lower than the communication quality threshold, the signal-to-noise ratio parameter is smaller than the signal-to-noise ratio threshold, and the data transmission delay exceeds the delay threshold.
It can be seen that, by using the cell switching device described in the foregoing embodiment, the accuracy of determining the co-channel interference scene can be improved as much as possible by using limited overhead by detecting the communication quality parameter, the signal-to-noise ratio parameter, the data transmission delay, and other parameters corresponding to the resident cell and performing the threshold determination.
In an embodiment, the cell switching apparatus may further include an adjusting unit, not shown in the drawing, where the adjusting unit may be configured to adjust the communication quality parameter to a communication quality target value after the scenario determining unit determines that the terminal device is in a co-channel interference scenario, where the communication quality target value is lower than the communication quality threshold, so as to trigger a first cell switching event of the terminal device, where the first cell switching event is an event of switching the terminal device from the camped cell to an inter-frequency cell different from a communication frequency band of the camped cell.
It can be seen that, by using the cell switching apparatus described in the foregoing embodiment, the communication quality parameter corresponding to the resident cell can be actively adjusted, so that the terminal device triggers the pilot frequency detection, and further, the cell switching can be realized according to the pilot frequency detection result.
In one embodiment, the measurement unit 701 may include a cell measurement subunit, a report generation subunit, and a cell acquisition subunit, which are not shown in the drawing, where:
the cell measurement subunit is used for measuring different-frequency cells different from the communication frequency band of the resident cell of the terminal equipment when the terminal equipment is in a same-frequency interference scene, and respectively obtaining signal-to-noise ratio parameters corresponding to each different-frequency cell;
a report generating subunit, configured to generate a measurement report according to the signal-to-noise ratio parameter corresponding to each inter-frequency cell, and report the measurement report to a network device;
and a cell acquiring subunit, configured to acquire the target inter-frequency cell fed back by the network device according to the measurement report.
It can be seen that, with the cell switching apparatus described in the foregoing embodiment, the terminal device can actively and timely trigger a cell switching event by generating a measurement report and reporting the measurement report to the network device, which is beneficial to improving the efficiency of determining a target inter-frequency cell and performing subsequent cell switching.
In an embodiment, the cell switching apparatus may further include a response unit, not shown in the drawing, where the response unit is configured to refuse to respond to a second cell switching event of the terminal device within a first time duration after the switching unit 702 switches the terminal device from the camped cell to the target inter-frequency cell, where the second cell switching event is an event of switching the terminal device from the target inter-frequency cell to a cell with the same frequency as the communication frequency band of the camped cell.
In one embodiment, the response unit may include a measurement result obtaining subunit, a marking subunit, and a rejecting subunit, which are not shown in the drawing, wherein:
a measurement result obtaining subunit, configured to obtain, within a first duration, a measurement result for measuring a neighboring cell of the terminal device;
a marking subunit, configured to mark, when the neighboring cell includes a co-frequency cell having the same communication frequency band as a resident cell, a target measurement result corresponding to the co-frequency cell in the measurement result;
and the rejecting subunit is used for rejecting to report the target measurement result to the network equipment to reject to respond to the second cell switching event when the marked target measurement result triggers the second cell switching event of the cell switching of the terminal equipment.
It can be seen that, by using the cell switching apparatus described in the foregoing embodiment, by rejecting the terminal device to switch from the target different-frequency cell back to the original resident cell and the same-frequency cell within a certain time, the ping-pong switching of the terminal device can be avoided, and the effectiveness of cell switching is ensured.
Referring to fig. 8, fig. 8 is a schematic block diagram of a terminal device according to an embodiment of the present disclosure. As shown in fig. 8, the terminal device may include a memory 801 and a processor 802, where the memory 801 stores a computer program, and the computer program, when executed by the processor 802, enables the processor 802 to implement all or part of the steps in any of the cell handover methods described in the above embodiments.
Furthermore, the present application further discloses a computer-readable storage medium storing a computer program for electronic data exchange, where the computer program, when executed by a processor, enables the processor to implement all or part of the steps in any one of the cell handover methods described in the above embodiments.
In addition, the embodiments of the present application further disclose a computer program product, when the computer program product runs on a computer, the computer may implement all or part of the steps in any one of the cell handover methods described in the above embodiments.
It will be understood by those skilled in the art that all or part of the steps of the methods of the above embodiments may be implemented by program instructions associated with hardware, and the program may be stored in a computer-readable storage medium, which includes Read-Only Memory (ROM), random Access Memory (RAM), programmable Read-Only Memory (PROM), erasable Programmable Read-Only Memory (EPROM), one-time Programmable Read-Only Memory (OTPROM), electrically Erasable Programmable Read-Only Memory (EEPROM), an optical Disc-Read-Only Memory (CD-ROM) or other storage medium, a magnetic tape, or any other medium capable of storing data for a computer or other computer.
The cell switching method and apparatus, the terminal device, and the storage medium disclosed in the embodiments of the present application are described in detail above, and specific examples are applied herein to explain the principles and embodiments of the present application, and the description of the embodiments is only used to help understand the method and the core idea 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 (9)
1. A cell switching method is applied to a terminal device, and comprises the following steps:
when the terminal equipment is in a same-frequency interference scene, measuring a pilot frequency cell different from a communication frequency band of a resident cell of the terminal equipment, and determining a target pilot frequency cell, wherein a signal-to-noise ratio parameter corresponding to the target pilot frequency cell is greater than a signal-to-noise ratio parameter corresponding to the resident cell, and the same-frequency interference scene is a scene of mutual interference between the resident cell and the pilot frequency cell with the same communication frequency band;
switching the terminal equipment from the resident cell to the target pilot frequency cell;
and within a first time length, refusing to respond to a second cell switching event of the terminal equipment, wherein the second cell switching event is an event of switching the terminal equipment from the target pilot frequency cell to a same-frequency cell with the same communication frequency band as the resident cell.
2. The method according to claim 1, wherein before the measuring the inter-frequency cell different from the communication frequency band of the cell where the terminal device resides and determining the target inter-frequency cell when the terminal device is in the co-frequency interference scenario, the method further comprises:
detecting communication quality parameters and signal-to-noise ratio parameters corresponding to the resident cells of the terminal equipment;
and if the communication quality parameter is not lower than the communication quality threshold and the signal-to-noise ratio parameter is smaller than the signal-to-noise ratio threshold, determining that the terminal equipment is in a same frequency interference scene.
3. The method according to claim 2, wherein before determining that the terminal device is in a co-channel interference scenario if the communication quality parameter is not lower than a communication quality threshold and the signal-to-noise ratio parameter is smaller than a signal-to-noise ratio threshold, the method further comprises:
acquiring data transmission time delay corresponding to the terminal equipment in the resident cell;
if the communication quality parameter is not lower than the communication quality threshold and the signal-to-noise ratio parameter is smaller than the signal-to-noise ratio threshold, determining that the terminal device is in a same frequency interference scene, including:
and if the communication quality parameter is not lower than the communication quality threshold, the signal-to-noise ratio parameter is smaller than the signal-to-noise ratio threshold, and the data transmission delay exceeds the delay threshold, determining that the terminal equipment is in a same frequency interference scene.
4. The method of claim 2, wherein after the determining that the terminal device is in a co-channel interference scenario, the method further comprises:
and adjusting the communication quality parameter to a communication quality target value, wherein the communication quality target value is lower than the communication quality threshold value and is used for triggering a first cell switching event of the terminal equipment, and the first cell switching event is an event of switching the terminal equipment from the resident cell to a pilot frequency cell different from the communication frequency band of the resident cell.
5. The method according to any one of claims 1 to 4, wherein the measuring the inter-frequency cell different from the communication frequency band of the cell where the terminal device resides when the terminal device is in the same frequency interference scenario to determine the target inter-frequency cell comprises:
when the terminal equipment is in a same-frequency interference scene, measuring different-frequency cells different from the communication frequency band of the resident cell of the terminal equipment to respectively obtain signal-to-noise ratio parameters corresponding to each different-frequency cell;
generating a measurement report according to the signal-to-noise ratio parameter corresponding to each pilot frequency cell, and reporting the measurement report to network equipment;
and acquiring the target pilot frequency cell fed back by the network equipment according to the measurement report.
6. The method of claim 1, wherein denying the response to the second cell handover event of the terminal device for the first duration comprises:
acquiring a measurement result for measuring the adjacent cell of the terminal equipment within a first time length;
if the adjacent cell comprises a same-frequency cell with the communication frequency band of the resident cell, marking a target measurement result corresponding to the same-frequency cell in the measurement results;
and when the marked target measurement result triggers a second cell switching event for cell switching of the terminal equipment, refusing to report the target measurement result to the network equipment so as to refuse to respond to the second cell switching event.
7. A cell switching apparatus, applied to a terminal device, the cell switching apparatus comprising:
the measurement unit is used for measuring a pilot frequency cell different from a communication frequency band of a resident cell of the terminal equipment when the terminal equipment is in a same frequency interference scene, and determining a target pilot frequency cell, wherein a signal-to-noise ratio parameter corresponding to the target pilot frequency cell is larger than a signal-to-noise ratio parameter corresponding to the resident cell, and the same frequency interference scene is a scene of mutual interference between the resident cell and the same frequency cell with the same communication frequency band;
a switching unit, configured to switch the terminal device from the residential cell to the target inter-frequency cell;
a responding unit, configured to refuse to respond to a second cell handover event of the terminal device within a first time duration, where the second cell handover event is an event of handing over the terminal device from the target inter-frequency cell to a co-frequency cell with a same communication frequency band as the resident cell.
8. A terminal device comprising a memory and a processor, the memory having stored thereon a computer program which, when executed by the processor, causes the processor to carry out the method of any one of claims 1 to 6.
9. A computer-readable storage medium, on which a computer program is stored, which, when being executed by a processor, carries out the method according to any one of claims 1 to 6.
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| CN114760668A (en) * | 2022-04-26 | 2022-07-15 | 中国电信股份有限公司 | Communication control method, system and base station |
Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109842909A (en) * | 2017-11-27 | 2019-06-04 | 大唐移动通信设备有限公司 | A kind of processing method and processing device preventing pingpang handoff |
| CN111065127A (en) * | 2020-01-21 | 2020-04-24 | 维沃移动通信有限公司 | Reporting method of measurement report and electronic equipment |
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| CN101557628B (en) * | 2008-04-11 | 2011-04-20 | 大唐移动通信设备有限公司 | Measurement starting method of cell reselection and mobile terminal thereof |
| CN101662817A (en) * | 2008-08-29 | 2010-03-03 | 中兴通讯股份有限公司 | Method for carrying out intermode measurement or differential-frequency measurement and multimode wireless communication system terminal |
| CN102379140A (en) * | 2009-03-20 | 2012-03-14 | 华为技术有限公司 | Method and equipment for handing over between cells |
| CN102238680B (en) * | 2010-05-07 | 2013-12-04 | 华为技术有限公司 | Heterogeneous network switching control method, signal transmission method, equipment and communication system |
| US9860814B2 (en) * | 2013-11-13 | 2018-01-02 | Telefonaktiebolaget Lm Ericsson (Publ) | Method and arrangement in a telecommunication system |
| CN111405622B (en) * | 2020-03-20 | 2022-10-25 | Oppo广东移动通信有限公司 | Switching method and device based on voice quality, terminal and storage medium |
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Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109842909A (en) * | 2017-11-27 | 2019-06-04 | 大唐移动通信设备有限公司 | A kind of processing method and processing device preventing pingpang handoff |
| CN111065127A (en) * | 2020-01-21 | 2020-04-24 | 维沃移动通信有限公司 | Reporting method of measurement report and electronic equipment |
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