CN112804718B - Network switching method, terminal and storage medium - Google Patents

Abstract

The present invention relates to communication technology, and discloses a network switching method, a terminal and a storage medium. The method comprises: obtaining a service capability performance index for characterizing the service capability of a currently accessed cell; correcting the actual network signal strength of the currently accessed cell obtained according to the service capability index to obtain a corrected signal strength; and performing network switching if the corrected signal strength meets a preset network switching condition. The signal strength of the terminal is matched with the network service quality actually obtained by the terminal from the currently accessed cell, so that it is possible to more accurately determine whether to perform network switching, thereby achieving the purpose of optimizing the power consumption of the terminal.

Description

Network switching method, terminal and storage medium

Technical Field

The present invention relates to the field of communication technology, and in particular to a network switching method, a terminal and a storage medium.

Background Art

At present, the fifth generation mobile communication network (5th Generation Mobile Network, referred to as "5G") is in the popularization period, while the fourth generation mobile communication network (4th Generation Mobile Network, referred to as "4G") is still widely deployed. Compared with the 4G network, the 5G network has the characteristics of low latency and high speed, but the power consumption of the 5G network is also significantly higher than that of the 4G network. Therefore, how to accurately optimize the power consumption of 5G terminals has become an important issue. Since 5G terminals can connect to both 5G networks and 4G networks, terminals often switch the network to 4G networks when the quality of the 5G network is poor to reduce terminal power consumption.

However, the inventors of the present application discovered that in the prior art, the following situation often occurs: the terminal measures that the signal strength index of the access base station cell is good, but cannot provide the terminal with network resources that match the signal strength, and because the signal strength index does not meet the network switching threshold, it continues to remain in the current 5G base station cell and cannot switch to a 4G base station cell with better service capabilities, resulting in waste of power consumption.

Summary of the invention

The purpose of the embodiments of the present invention is to provide a network switching method, a terminal and a storage medium.

To solve the above technical problems, an embodiment of the present invention provides a network switching method, including: obtaining a service capability performance indicator used to characterize the service capability of a currently accessed cell; correcting the actually measured network actual signal strength of the currently accessed cell according to the service capability performance indicator to obtain a corrected signal strength; if the corrected signal strength meets a preset network switching condition, performing a network switching.

An embodiment of the present invention also provides a network switching terminal, comprising: at least one processor; and a memory communicatively connected to the at least one processor; wherein the memory stores instructions executable by the at least one processor, and the instructions are executed by the at least one processor so that the at least one processor can execute the network switching method as described above.

An embodiment of the present invention further provides a computer-readable storage medium storing a computer program, and when the computer program is executed by a processor, the network switching method as described above is implemented.

BRIEF DESCRIPTION OF THE DRAWINGS

One or more embodiments are exemplarily described by the pictures in the corresponding drawings, and these exemplary descriptions do not constitute limitations on the embodiments.

FIG1 is a flow chart of a network switching method according to a first embodiment of the present invention;

2 is a schematic diagram of the structure of a wireless protocol standard according to a first embodiment of the present invention;

3 is a flow chart of a network switching method according to a second embodiment of the present invention;

4 is a flow chart of a specific process of network switching decision according to a second embodiment of the present invention;

5 is a flow chart of a network switching method according to a third embodiment of the present invention;

FIG. 6 is a schematic diagram of the structure of a terminal according to a fourth embodiment of the present invention.

DETAILED DESCRIPTION

In order to make the purpose, technical solution and advantages of the present application more clearly understood, the present application is further described in detail below in conjunction with the accompanying drawings and various embodiments. It should be understood that the specific embodiments described herein are only used to explain the present application and are not used to limit the present application.

It should be noted that, although the functional modules are divided in the device schematic diagram and the logical order is shown in the flowchart, in some cases, the steps shown or described may be performed in a different order than the module division in the device or the order in the flowchart. The terms "first", "second", etc. in the specification and the above-mentioned drawings are used to distinguish similar objects and are not necessarily used to describe a specific order or sequence. In the embodiments of the present invention, the terminal mentioned can be various terminal devices that can connect to a mobile network, such as a mobile phone, a tablet computer, etc., which are not listed one by one here.

The first embodiment of the present invention relates to a network switching method, which is applied to a terminal, such as a user's mobile phone or tablet computer. In this embodiment, a service capability performance indicator for characterizing the service capability of a current access cell is obtained; the actual measured network signal strength of the current access cell is corrected according to the service capability performance indicator to obtain a corrected signal strength; if the corrected signal strength meets a preset network switching condition, the network switching is performed.

This embodiment is further described below in conjunction with the accompanying drawings.

The network switching method in this embodiment is shown in FIG1 , and specifically includes:

Step 101: Obtain a service capability performance indicator for characterizing the service capability of a current access cell.

Specifically, when the terminal obtains the cell system message SIB from the cell base station, step 101 is triggered. The cell service capability in this embodiment, that is, the data transmission quality between the terminal and the cell base station, is characterized by a service capability performance indicator. Among them, since the channel resources allocated by the cell base station to the terminal directly determine the network uplink/downlink rate between the terminal and the cell, and have a greater impact on the data transmission quality, the channel resources allocated by the cell base station to the terminal can be used as a service capability performance indicator. In practical applications, the above-mentioned service capability performance indicators may also include: frame packet confirmation response rate, frame packet error rate or retransmission rate (Block Error Ratio, referred to as BLER), and the number of data resource blocks (Grant) authorized by the network to send the terminal, etc., which are not listed one by one here.

The channel resources allocated by the cell base station to the terminal, that is, the theoretical peak value of the data transmission rate between the terminal and the cell base station, are determined by the MCS (Modulation and Coding Scheme) negotiated between the terminal and the cell base station. The higher the level of the modulation algorithm strategy, the higher the theoretical peak value of the data transmission rate. The modulation algorithm strategy determines the TBS data resource transmission block size, the number of data blocks, the number of resource layers, and the modulation algorithm used that the terminal can select.

TBS (Transfer Block Size), the number of data blocks transmitted in each time slot, and the number of resource layers can be directly obtained from the state of PDSCH/PUSCH (physical uplink/downlink shared channel) read by the MAC layer (Media Access Control) abstracted from the mobile wireless network protocol. Among them, the larger the TBS value, the higher the data transmission rate between the terminal and the cell base station; the number of data blocks, that is, the number of data blocks allocated to the terminal for transmission by the base station in each time slot, that is, the more data blocks, the higher the data transmission rate between the terminal and the cell base station; the number of resource layers is related to MIMO (multiple transceiver technology). The more receiving/transmitting channels the network protocol allocates to the terminal, the more layers there are, which means that when other parameters are the same, the data transmission rate is higher.

Based on the above description, it can be understood that the channel resources allocated by the cell base station to the terminal are reflected in the data transmission rate, and the actual data transmission rate between the terminal and the cell base station can be obtained directly from the MAC layer. The relevant data can also be obtained based on the TBS, the number of data blocks, the number of resource layers and the modulation algorithm obtained from the MAC layer.

In addition, among the other indicators that affect the cell service capability, the frame packet confirmation response rate can be calculated by obtaining the number of data packets sent and the number of data packets confirmed in the RLC layer (Radio Link Control) per unit time. If the number of sent data packets is much larger than the number of confirmed data packets, it means that the base station performance is poor and the speed of replying to the confirmation packet is slow, so the uplink rate is low; the frame packet bit error rate or retransmission rate BLER reflects the data loss during the downlink data transmission process, that is, the actual downlink network transmission rate also needs to multiply the actual available channel rate by the BLER, so the higher the downlink BLER, the lower the downlink data transmission rate.

Step 102: Correct the acquired actual network signal strength of the current access cell according to the service capability performance indicator.

Specifically, the terminal measures the network signal strength of the currently accessed cell in real time to obtain the actual network signal strength of the currently accessed cell. When the cell base station is under high load, since the signal strength of the network connection between the cell base station and the terminal cannot accurately reflect the service capability that the cell base station can actually provide, the actual measured network signal strength of the currently accessed cell is corrected according to the actual service capability performance index of the currently accessed cell, so that the corrected signal strength can accurately reflect the service capability provided by the cell base station to the terminal.

More specifically, according to the mapping relationship between the preset service capability performance indicator and the equivalent signal strength, the equivalent signal strength corresponding to the service capability performance indicator is determined, and then the actual network signal strength is corrected according to the equivalent signal strength. Further, in a preset network environment, that is, in a simulated ideal network state, when the load of the cell base station is within the normal range, the terminal accessing the cell is simulated with different levels of signal strength to obtain the actual service capability performance indicator detected by the terminal under different signal strengths, and then a mapping relationship is established between the signal strength of the simulated test and the service capability performance indicator obtained under the signal strength. The signal strength of the simulated test can be understood as the equivalent signal strength, so the mapping relationship can be saved through an equivalent signal table. In addition, since the network conditions cannot reach the ideal value in actual applications, the service capability performance indicator obtained by the simulated test will be reduced by a certain proportion, and a mapping relationship is established between the reduced service capability indicator and the signal strength.

In a specific implementation, first simulate and establish an ideal network environment, then fully simulate each signal level, and record the relevant data of the following service capability performance indicators:

1. TBS (Transfer block size) allocated by the base station. The data comes from the status of the PDSCH/PUSCH channel read from the MAC layer. It reflects the size of the transmission resource block allocated by the base station. The larger the value, the higher the downlink/uplink transmission rate.

2. The number of resource blocks allocated by the base station. The data comes from the status of the PDSCH/PUSCH channel read from the MAC layer. In each time slot, the number of resource blocks allocated by the base station is the higher the number, the higher the downlink/uplink transmission rate.

3. The number of resource layers allocated by the base station. The data comes from the status of the PDSCH/PUSCH channel read from the MAC layer, which means that in each time slot, the number of resource layers is related to MIMO. The more receiving/transmitting channels the network allocates to the terminal, the more layers there are, and the higher the downlink/uplink transmission rate. The size and number of transmission resource blocks and the number of resource layers can be multiplied to calculate the theoretical downlink/uplink rate allocated by the network at this time.

4. The MCS (Modulation and Coding Scheme) modulation algorithm strategy assigned to the terminal by the base station comes from the data coding algorithm of the PDSCH/PUSCH channel read from the MAC layer. The higher the level, the larger the amount of data carried in the unit time slot resource, the larger the transmission resource block, and the higher the downlink/uplink transmission rate.

5. The downlink BLER bit error rate of the MAC layer in the base station and terminal transmission protocol, which is in turn the CRC check success rate of the data packet. Due to data loss during data transmission, the theoretical downlink rate will generally be discounted. The actual physical layer downlink rate should also be multiplied by the CRC success rate. Therefore, the lower the BLER and the higher the CRC check success rate, the higher the downlink transmission rate.

6. The packet retransmission rate and packet loss rate of the RLC layer in the base station and terminal transmission protocol. Data can be read from the RLC layer. The higher the packet retransmission rate and loss rate, the lower the downlink transmission rate.

7. The number of Grants given by the base station in the uplink indication channel per unit time (the number of data resource blocks authorized by the network to the terminal, and the terminal needs to send data in the time slot or frame allowed by the base station) can be obtained from the MAC layer or Lay1 layer. The actual theoretical uplink rate needs to be multiplied by the Grant situation. Generally, the base station does not allow the terminal to send data in every time slot, so the higher the Grant rate, the higher the uplink rate.

8. The base station's confirmation speed for RLC layer data packets. Each time an RLC data packet is sent, the base station will reply with a confirmation in the corresponding subframe, and obtain the number of sent data packets and the number of confirmed data packets from the RLC layer. If the former is much larger than the latter, it means that the base station has poor performance, replies to confirmation packets very slowly, and has a low uplink rate.

Then, a mapping relationship is established between the performance indicator data recorded under each signal level and the signal level to obtain an equivalent signal table. In practical applications, signal strength is generally measured by any one of the following parameters: RSRP (reference signal received power), RSRQ (reference signal received quality), and SNR (signal-to-noise ratio). Therefore, in practical applications, when establishing a mapping relationship between equivalent signal strength and service capability performance indicators, mapping relationships are often established according to the three signal strength indicators, and three mapping relationships are saved in the form of mapping tables, namely: RSRP equivalent signal table, RSRQ equivalent signal table, and SNR equivalent signal table. When the preset network switching threshold uses RSRP as an indicator, the actual signal strength is corrected according to the equivalent signal strength found in the RSRP equivalent signal table. Similarly, when the preset network switching threshold uses RSRQ or SNR as an indicator, the actual signal strength is corrected according to the RSRQ equivalent signal table or the SNR equivalent signal table.

In addition, in actual applications, for different types of network cells, such as the first network cell and the second network cell, the signal strength levels of different network cells can be simulated in advance in a preset network environment to generate equivalent signal tables for different network cells. When the terminal resides in the first network cell, the first network equivalent signal table is used to find the corresponding equivalent signal strength to correct the actual signal strength; when the terminal resides in the second network cell, the second network equivalent signal table is used to find the corresponding equivalent signal strength to correct the actual signal strength.

In one example, if the equivalent signal strength determined according to the service capability performance indicator is less than the actual signal strength measured by the terminal, the actual signal strength is corrected downward so that the corrected signal strength is consistent with the equivalent signal strength mapped to the service capability performance indicator. In practical applications, since the actual cell service capability is often difficult to fully reach the ideal cell service capability, the correction amplitude can be appropriately reduced based on experience so that the corrected signal strength is slightly greater than the equivalent signal strength.

In one example, if the equivalent signal strength determined according to the service capability performance indicator is greater than the actual signal strength measured by the terminal, the actual signal strength is corrected upward so that the corrected signal strength is consistent with the equivalent signal strength mapped to the service capability performance indicator. In practical applications, since the actual cell service capability is often difficult to fully reach the ideal cell service capability, the correction amplitude can be appropriately reduced based on experience so that the corrected signal strength is slightly less than the equivalent signal strength.

Step 103: If the corrected signal strength meets the preset network switching condition, perform network switching.

Specifically, the network switching condition is whether the corrected signal strength reaches the preset network switching threshold. The network switching threshold is obtained from the cell system message SIB. If the corrected signal strength does not reach the preset network switching threshold, the network switching is performed; if the corrected signal strength reaches the preset network switching threshold, it remains in the current cell. When the terminal is in the first network base station cell, if the signal strength of the current base station cell is high but the service capability provided is poor, then when the corrected signal strength is less than the preset network switching threshold, it switches to the first network base station cell or the second network base station cell with good service capability according to the specific use status of the terminal. If the terminal is currently in a use state with a high-speed requirement, it switches to the first network base station cell; if the terminal is currently in a use state with a low-speed requirement, it switches to the second network base station cell. Among them, the network rate of the first network is greater than the network rate of the second network, and the power consumption of the terminal when accessing the first network is greater than the power consumption when accessing the second network.

In the specific implementation, taking the application scenario where the first network is a 5G network and the second network is a 4G network as an example, if the cell currently accessed by the terminal is a 5G base station cell, and the equivalent signal strength determined according to the service capability performance indicator is less than the actual signal strength measured by the terminal, it means that the currently accessed 5G base station cell cannot provide the terminal with a network rate that matches the signal strength. Then, after the actual measured network signal strength of the currently accessed cell is corrected downward, it is determined whether the corrected signal strength is less than the preset network switching threshold. If the corrected signal strength is less than the preset network switching threshold, the network is switched to an adjacent cell with a better signal; otherwise, it remains stationed in the current base station cell. If the current terminal is in the state of using the network and has a high demand for the network rate, it is preferred to switch to the 5G base station cell to ensure the user's network experience; if the network connection between the current terminal and the cell base station is temporarily idle or the demand for the network rate is low, it is preferred to switch to the 4G network to reduce the terminal power consumption and extend the terminal battery life.

If the cell currently accessed by the terminal is a 5G base station cell, and the equivalent signal strength determined according to the service capability performance indicator is greater than the actual signal strength measured by the terminal, it means that although the signal strength of the currently accessed 5G base station cell is not good, it can provide better service capabilities for the terminal. In this way, the signal strength is corrected upward so that the corrected signal strength is greater than the preset network switching threshold, thereby avoiding the situation where the network is switched to a base station cell with good signal but poor service capability after an incorrect judgment is made on the service capability that the cell base station can provide due to the weak actual signal strength actually measured by the terminal.

In a specific implementation, the wireless protocol standard structure related to this embodiment abstracted from the wireless communication protocol standard is shown in Figure 2. Among them, the relevant modules can be divided into two parts: the control plane and the user plane. The control plane is mainly responsible for call establishment, data activation, generation of air interface signaling, and interaction with the core network non-access layer; the user plane is responsible for the transmission of service data.

The control plane module includes the SD (System Determination) system selection module and the RRC (Radio Resource Control) wireless resource control module. The SD module plays a role in the reselection process. It records the network preferences set by the terminal factory or by the user, and provides the best network system selection decision to the bottom layer. The present invention does not change the decision logic of this module. The RRC module generates air interface signaling to apply for wireless link resources from the network.

The user plane is the data transmission of the user terminal application. It can be the upper layer data protocol data packets such as HTTP/TCP/IP/UDP. The PDCP (Packet Data Convergence Protocol) subnet aggregation protocol on the terminal network protocol stack side compresses and reassembles the data packet header, and then sends it to the underlying protocol.

The signaling of the control plane and the data of the user plane must be sent to the base station through the underlying RLC layer-MAC layer-L1-RF radio frequency control module. The RLC (Radio Link Control) wireless link control module is responsible for data reorganization and transmission. According to the characteristics of the upper layer protocol, the data is divided into three types: transparent transmission, confirmed transmission, and unconfirmed transmission, and mapped to different logical channels to complete transmission control and error correction. The MAC (Media Access Control) media access control module maps the transmission of the logical channel to the physical channel, completes transmission control and error correction, and parses the access control information of special channels. The Lay1Manager layer 1 control module is responsible for processing data encoding and decoding, modulation and demodulation, multi-antenna mapping and other telecommunications physical layer functions, and schedules the radio frequency module according to the time slot resources allocated by the base station.

Lay1Manager is responsible for measuring cell information and network switching. Lay1 will also report the measurement data of the current access cell and the cells adjacent to the current access cell to RRC, and RRC will generate a measurement report and send it to the network, waiting for the switching instruction from the network side and completing the switching. By embedding the measurement report optimization module in the protocol to execute steps 101 to 102 of the network switching method in this embodiment, the reselection and switching thresholds are obtained from Lay1 and RRC, the wireless resource allocation and modulation coding level are obtained from the MAC layer, and the bit error rate and base station ack response speed are obtained from the RLC layer. The above factors are combined to calculate the equivalent signal value, and the actual signal value measured by the Lay1Manager layer for the current access cell and the cells adjacent to the current access cell is corrected, so as to achieve the purpose of rate stability optimization and power saving.

It should be noted that the above examples in this embodiment are all illustrative descriptions for easy understanding and do not constitute a limitation on the technical solutions of the present invention.

Compared with the prior art, this embodiment measures the actual service capability of the currently accessed cell, and corrects the signal strength of the wireless network of the cell to which the terminal is connected according to the actual service capability, so that the signal strength matches the actual service capability of the current cell. The terminal can switch the cell network in a more suitable network environment, thereby avoiding the terminal from remaining stationed in a base station cell with high signal strength and low service capability for a long time, or switching from a base station cell with poor signal strength and good service capability to a base station cell with poor service capability, thereby reducing terminal power consumption and ensuring the stability of the terminal rate.

A second embodiment of the present invention relates to a network switching method. In this embodiment, after obtaining the corrected signal strength, it also includes: recording the cell network information of the cell before switching and saving it locally; the cell network information includes: the identification information of the cell before switching and the actual signal strength of the network; deleting the cell network information after a first preset time period; before performing network switching, it also includes: obtaining the identification information of each target cell in the target cell list and the current actual signal strength of each target cell one by one; searching locally for the network information of the target cell based on the identification information of the target cell; if the network information of the target cell exists locally and the current actual signal strength of the target cell is greater than the actual signal strength in the saved target cell network information, the target cell is excluded from the target cell list; if the corrected signal strength does not reach the preset network switching threshold, a cell switching decision is made based on the current target cell list.

This embodiment is further described below in conjunction with the accompanying drawings.

The network switching method in this embodiment is shown in FIG2 , and specifically includes:

Step 301, obtaining a service capability performance indicator for characterizing the service capability of the current access cell;

Step 302: Correct the actual measured network signal strength of the current access cell according to the service capability indicator.

Step 301 to step 302 are similar to step 101 to step 102 in the first embodiment of the present invention. The relevant specific implementation details have been described in the first embodiment of the present invention and will not be repeated here.

Step 303: If the corrected signal strength meets the preset network switching condition, perform network switching.

Step 304, record the cell network information of the cell accessed before the handover and save it locally.

Step 305, delete the cell network information after the first preset time. That is, after the network is switched, the cell network information of the access cell before the switch needs to be stored locally for a period of time. If the record exceeds the set retention time, it will be automatically deleted. This is because the status of the base station changes at any time, so a certain time limit is set for the record to ensure the validity of the record. In addition, since the actual load conditions of each base station cell are different, the preset time length is generally determined based on the historical service load and experience of the base station cell, and the specific value is not limited here.

By saving the cell network information of the cell connected to the terminal before cell switching locally, the terminal can use the saved cell network information and the actual network signal strength of the cell currently measured to determine whether the cell is still in a state where the signal strength does not match the actual service capability that can be provided after switching out of the cell, so as to facilitate network switching decisions.

The specific process of network switching decision is shown in Figure 4, including:

Step 401, obtaining a target cell list.

Specifically, the terminal obtains the initial target cell list from the cell system message SIB. The target cell is a cell adjacent to the cell currently accessed by the terminal. The initial target cell list contains all target cells and identification information of each target cell. The identification information includes: tracking area identifier, cell identifier and cell frequency.

Step 402: Obtain identification information of each target cell in the target cell list, and measure the actual current signal strength of each target cell.

Specifically, the terminal searches for each target cell according to the identification information in the cell system message SIB, measures the current actual network signal strength of each target cell, and stores the measurement result locally.

Step 403, search locally for cell network information of the target cell. If the cell network information of the target cell exists locally, execute step 404 to determine whether the current actual network signal strength of the target cell is greater than the actual network signal strength in the stored cell network information; if the cell network information of the target cell does not exist locally, execute step 407 to make a network switching decision based on the current target cell list.

Specifically, according to the identification information of the target cell, the local search is performed to determine whether the cell network information corresponding to the identification information of the target cell is stored. If the cell network information of the target cell exists locally, it means that the time when the terminal was cut out of the target cell has not exceeded the first preset duration, that is, the target cell may still be in a state of high network signal strength and low service capability. Therefore, it is further determined whether the current actual network signal strength of the target cell is greater than the actual network signal strength in the stored cell network information. If the network information of the target cell does not exist locally, it means that the time when the terminal was cut out of the target cell exceeds the first preset duration or the terminal has never resided in the target cell. Therefore, it is possible to try to cut into the target cell to obtain better service capabilities.

Step 404, determine whether the current actual network signal strength of the target cell is greater than the actual network signal strength in the saved cell network information. If the current actual network signal strength of the target cell is not greater than the actual network signal strength in the saved cell network information, execute step 405 to remove the target cell from the target cell list; if the current actual network signal strength of the target cell is greater than the actual network signal strength in the saved cell network information, execute step 406 to determine whether the search for all target cell network information is completed.

Specifically, if the current actual network signal strength of the target cell is not greater than the actual network signal strength in the saved cell network information, it means that the service capability that the target cell can currently provide has not been improved relative to the service capability that can be provided when the terminal is cut out of the target cell. Therefore, the target cell is removed from the target cell list to avoid switching into the target cell and obtaining poor service capability, affecting the user experience; if the current actual network signal strength of the target cell is greater than the actual network signal strength in the saved cell network information, it means that the service capability that the target cell can currently provide may be better than the service capability that can be provided when the terminal is cut out of the target cell. Therefore, you can try to switch into the target cell to obtain better service capability.

Step 406, determine whether the search for network information of all target cells is completed. If the search for network information of all target cells is not completed, execute step 403; if there is no target cell for which the local search for cell network information is not performed, execute step 407.

Specifically, the terminal needs to perform an operation of searching for cell network information locally for each target cell in the initial target cell list obtained in step 401 .

Step 407: Make a cell switching decision based on the current target cell list.

Specifically, after all target cells in the target cell list have executed the operations from step 403 to step 406 above, it is first determined whether the signal strength of the cell currently accessed by the terminal, after correction according to the equivalent signal table, reaches the preset network switching threshold. The network switching threshold is obtained from the cell system message SIB. If the corrected signal strength does not reach the preset network switching threshold, the network is switched to the target cell with the highest actual network signal strength in the current target cell list; if the corrected signal strength is greater than the preset network switching threshold, the terminal remains in the current cell.

The step division of the above methods is only for the purpose of clear description. When implemented, they can be combined into one step or some steps can be split and decomposed into multiple steps. As long as they include the same logical relationship, they are all within the scope of protection of this patent; adding insignificant modifications to the algorithm or process or introducing insignificant designs without changing the core design of the algorithm and process are all within the scope of protection of this patent.

Compared with the prior art, this embodiment records and stores the actual signal strength of the access cell before network switching locally. After switching out of a cell with high signal strength but low service capability, it can avoid switching to the cell again within a preset time period based on the locally stored records, thereby better ensuring the network rate of the terminal and avoiding an increase in power consumption caused by the terminal switching to a cell with high signal strength but low service capability.

The third embodiment of the present invention relates to a network switching method, which is substantially the same as the second embodiment of the present invention, except that, in the second embodiment of the present invention, after obtaining the corrected signal strength, the cell network information of the currently accessed cell is recorded and stored locally, and then the cell network information is deleted after a preset time. In the present embodiment, after obtaining the corrected signal strength, the cell network information of the currently accessed cell is uploaded to a cloud server, so that the cloud server can store the cell network information for a second preset time.

This embodiment is further described below in conjunction with the accompanying drawings.

The network switching method in this embodiment is shown in FIG5 , and specifically includes:

Step 501, obtaining a service capability performance indicator for characterizing the service capability of the current access cell;

Step 502: Correct the actual measured network signal strength of the current access cell according to the service capability indicator.

Step 503: If the corrected signal strength meets the preset network switching condition, perform network switching.

Step 504: Upload the cell network information of the cell accessed before the handover to the cloud server, so that the cloud server can store the cell network information for a second preset time period. The network information includes: identification information of the current access cell and actual network signal strength.

Specifically, steps 501 to 504 are similar to steps 301 to 304 in the second embodiment of the present application, with the difference that, in the second embodiment of the present application, the terminal searches the local record for cell network information of the target cell; whereas in the present embodiment, the terminal queries the cloud server for cell network information of the target cell. In addition, the cell network information of the access cell before switching in the second embodiment is stored locally by the terminal and deleted by the terminal after the first preset time duration; whereas in the present embodiment, the cell network information of the access cell before switching is uploaded to the cloud server by the terminal for storage, and deleted by the cloud server after the second preset time duration. In actual applications, the second preset time duration is generally set to an equal value to the first preset time duration. Other relevant specific implementation details have been described in the second embodiment of the present application and will not be repeated here.

In one example, the terminal can simultaneously save the cell network information of the currently accessed cell locally and upload it to the cloud. When the terminal needs to obtain the cell network information of the target cell, it searches both locally and in the cloud. If the cell network information records of the target cell exist both locally and in the cloud, the timestamp in each cell network information record is read, and the latest cell network record is used as the basis for subsequent judgment.

Compared with the prior art, the technical solution in this embodiment can obtain the approximate actual load status of the base station more timely, thereby improving the efficiency of making a preliminary judgment on the service capability of the adjacent cells based on the actual signal strength of the adjacent cells of the currently accessed cell and the records saved in the cloud server, and determining the efficiency of the operation of determining the cell to be switched.

The step division of the above methods is only for the purpose of clear description. When implemented, they can be combined into one step or some steps can be split and decomposed into multiple steps. As long as they include the same logical relationship, they are all within the scope of protection of this patent; adding insignificant modifications to the algorithm or process or introducing insignificant designs without changing the core design of the algorithm and process are all within the scope of protection of this patent.

A fourth embodiment of the present invention relates to a terminal, as shown in Figure 6, comprising at least one processor 601; and, at least one memory 602; wherein the memory 602 stores instructions that can be executed by at least one processor 601, and the instructions are executed by at least one processor 601 so that at least one processor 601 can execute the network switching method in the first, second, or third embodiment.

The memory 602 and the processor 601 are connected in a bus manner, and the bus may include any number of interconnected buses and bridges, and the bus connects various circuits of one or more processors 601 and the memory 602 together. The bus can also connect various other circuits such as peripheral devices, voltage regulators, and power management circuits, which are well known in the art and are therefore not further described herein. The bus interface provides an interface between the bus and the transceiver. The transceiver can be one element or multiple elements, such as multiple receivers and transmitters, providing a unit for communicating with various other devices on a transmission medium. The data processed by the processor 601 is transmitted on a wireless medium via an antenna, and further, the antenna also receives data and transmits the data to the processor 601.

The processor 601 is responsible for managing the bus and general processing, and can also provide various functions, including timing, peripheral interfaces, voltage regulation, power management and other control functions. The memory 602 can be used to store data used by the processor 601 when performing operations.

A sixth embodiment of the present invention relates to a computer-readable storage medium storing a computer program, which implements the above method embodiment when executed by a processor.

That is, those skilled in the art can understand that all or part of the steps in the above method embodiments can be completed by instructing the relevant hardware through a program, and the program is stored in a storage medium, including a number of instructions to enable a device (which can be a single-chip microcomputer, chip, etc.) or a processor to execute all or part of the steps of the method described in each embodiment of the present application. The aforementioned storage medium includes: U disk, mobile hard disk, read-only memory (ROM, Read-Only Memory), random access memory (RAM, Random Access Memory), disk or optical disk and other media that can store program codes.

Those skilled in the art will appreciate that the above are specific embodiments for implementing the present invention, and that in actual applications, various changes may be made in form and detail without departing from the spirit and scope of the present invention.

Claims (10)

1. A network switching method, comprising:

acquiring a service capability performance index for representing the service capability of the current access cell;

correcting the acquired network actual signal intensity of the current access cell according to the service capability performance index to obtain corrected signal intensity;

If the corrected signal strength meets the preset network switching condition, performing network switching;

Storing the cell network information of the access cell before network switching to a target storage position; wherein the cell network information includes: identification information of the access cell before network switching and actual signal intensity of the network; the target storage position is a local or cloud server;

acquiring identification information of a target cell in a target cell list, and measuring the current actual signal strength of a network of the target cell;

searching whether the cell network information of the target cell exists in a target storage position;

If the target storage position has the cell network information of the target cell, determining whether to remove the target cell from the target cell list according to the current network actual signal strength of the target cell and the network actual signal strength in the cell network information of the target cell stored in the target storage position.

2. The network handover method according to claim 1, wherein the service capability performance index includes at least: allocated channel resources.

3. The network handover method according to claim 2, wherein the service capability performance index further comprises one or a combination of the following indexes:

frame packet acknowledgement response rate, frame packet error rate, or retransmission rate.

4. The network switching method of claim 3, wherein,

The allocated channel resources are read from a Media Access Control (MAC) layer; or the allocated channel resources are calculated according to the size of the resource blocks read from the MAC layer, the number of the allocated resource blocks, the number of the allocated resource layers and a modulation algorithm;

The frame packet acknowledgement response rate is read from a Radio Link Control (RLC) layer;

the frame packet error rate or retransmission rate is read from the MAC layer.

5. The network handover method according to claim 1, wherein the correcting the acquired network actual signal strength of the current access cell according to the service capability performance index includes:

determining the equivalent signal strength corresponding to the service capability performance index according to a preset mapping relation between the service capability performance index and the equivalent signal strength; the mapping relation is obtained by detecting service capability performance indexes according to the signal intensity of each level of the simulated ideal network state;

And correcting the actual signal strength of the network according to the equivalent signal strength.

6. The network switching method according to claim 1, wherein the target storage location is local, and after the network switching, the method specifically comprises:

Acquiring cell network information of an access cell before network switching and storing the cell network information in a local area, so that the local area can store the cell network information of the access cell before network switching for a first preset time length;

acquiring identification information of a target cell in a target cell list, and measuring the current actual signal strength of a network of the target cell;

Searching whether the cell network information of the target cell exists or not locally;

And if the cell network information of the target cell exists locally and the current network actual signal strength of the target cell is not more than the network actual signal strength in the stored cell network information, removing the target cell from the target cell list.

7. The network switching method according to claim 1, wherein the target storage location is a cloud server, and after the network switching, the method specifically comprises:

uploading cell network information of the access cell before network switching to a cloud server, and storing the cell network information of the access cell before network switching by the cloud server for a second preset time length;

acquiring identification information of a target cell in a target cell list, and measuring the current actual signal strength of a network of the target cell;

searching whether the cell network information of the target cell exists in the cloud server;

And if the cell network information of the target cell exists in the cloud server, and the current network actual signal strength of the target cell is not greater than the network actual signal strength in the uploaded cell network information, removing the target cell from the target cell list.

8. The network switching method according to any one of claims 1 to 7, wherein,

The signal strength comprises any one of the following indexes: reference signal received power RSRP, reference signal received quality RSRQ, or amplifier signal-to-noise ratio SNR.

9. A terminal, comprising:

At least one processor; and

At least one memory; wherein,

The memory stores instructions executable by the at least one processor to enable the at least one processor to perform the network handover method of any one of claims 1 to 8.

10. A computer readable storage medium storing a computer program, wherein the computer program when executed by a processor implements the network handover method of any one of claims 1 to 8.