CN108541029B - Cell switching method and device - Google Patents
Cell switching method and device Download PDFInfo
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- CN108541029B CN108541029B CN201710121040.5A CN201710121040A CN108541029B CN 108541029 B CN108541029 B CN 108541029B CN 201710121040 A CN201710121040 A CN 201710121040A CN 108541029 B CN108541029 B CN 108541029B
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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
- H04W36/0083—Determination of parameters used for hand-off, e.g. generation or modification of neighbour cell lists
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W36/00—Hand-off or reselection arrangements
- H04W36/08—Reselecting an access point
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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
The invention provides a cell switching method and a device, wherein the cell switching method comprises the following steps: issuing an information list of the MTC cell to a terminal so that the terminal can measure the signal quality of the MTC cell according to the information list of the MTC cell; receiving the signal quality of the MTC cell reported by the terminal; determining the relation among the signal quality of the MTC cell, the signal quality of a service cell of the terminal and the signal quality of an adjacent cell, and indicating the terminal to be switched to the MTC cell when the relation among the signal quality of the MTC cell, the signal quality of a service cell of the terminal and the signal quality of the adjacent cell meets a first preset condition; and the service cell of the terminal is a non-MTC cell. The method and the device can improve the reliability of the cell switching method.
Description
Technical Field
The present invention relates to the field of communications, and in particular, to a cell switching method and apparatus.
Background
In current cellular communication systems, a mobile terminal may perform cell switching as directed by a base station. However, when a mobile terminal (UE) is located in a relatively harsh communication environment, for example, in a basement, an elevator, or the like, signal quality of all cells may be very poor, which may cause that a current serving cell cannot continue to carry a service and cannot meet a preset handover condition, and further cause that the mobile terminal is disconnected from a network and further communication cannot be performed.
Disclosure of Invention
The invention solves the technical problem of improving the reliability of the switching method.
To solve the foregoing technical problem, an embodiment of the present invention provides a cell switching method, including: issuing an information list of the MTC cell to a terminal so that the terminal can measure the signal quality of the MTC cell according to the information list of the MTC cell; receiving the signal quality of the MTC cell reported by the terminal; determining the relation among the signal quality of the MTC cell, the signal quality of a service cell of the terminal and the signal quality of an adjacent cell, and indicating the terminal to be switched to the MTC cell when the relation among the signal quality of the MTC cell, the signal quality of a service cell of the terminal and the signal quality of the adjacent cell meets a first preset condition; and the service cell of the terminal is a non-MTC cell.
Optionally, the determining a relationship between the signal quality of the MTC cell, the signal quality of the serving cell of the terminal, and the signal quality of the neighboring cell includes: and comparing the signal quality of the MTC cell with the signal quality of the service cell and the signal quality of the adjacent cell after adding a preset bias.
Optionally, before the sending the information list of the MTC cell to the terminal, the method further includes: and determining that the signal quality of the serving cell and/or the signal-to-noise ratio of the serving cell meet a second preset condition.
Optionally, after determining that the signal quality of the serving cell and/or the signal-to-noise ratio of the serving cell meet a second preset condition, before issuing an information list of an MTC cell to a terminal, the method further includes: and determining that the relation between the signal quality of the service cell and the signal quality of the adjacent cell of the same system meets a third preset condition.
Optionally, the neighboring cells of the same system include a same-frequency neighboring cell and a different-frequency neighboring cell, and the determining that the relationship between the signal quality of the serving cell and the signal quality of the neighboring cell of the same system satisfies a third preset condition includes: and after the same-frequency adjacent cell is determined to meet the third preset condition, determining the different-frequency adjacent cell to meet the third preset condition.
Optionally, after determining that the relationship between the signal quality of the serving cell and the signal quality of the neighboring cell of the same system satisfies the third preset condition, before issuing the information list of the MTC cell to the terminal, the method further includes: and determining that the signal quality of the cell of the different system meets a fourth preset condition.
Optionally, the same system is selected from 2G, 3G, 4G and 5G mobile networks, and the different system is selected from 2G, 3G and 4G mobile networks and is different from the same system.
Optionally, the instructing the terminal to switch to the MTC cell includes: and instructing the terminal to access the MTC cell in a coverage enhancement mode A or a coverage enhancement mode B.
Optionally, instructing the terminal to access the MTC cell in coverage enhanced mode a or coverage enhanced mode B includes: if the signal quality of the MTC cell is greater than or equal to a preset threshold value, indicating the terminal to access the MTC cell in a coverage enhancement mode A; and if the signal quality of the MTC cell is smaller than a preset threshold value, indicating the terminal to access the MTC cell by adopting a coverage enhancement mode B.
Optionally, the serving cell of the terminal is selected from cells of 2G, 3G, 4G and 5G mobile networks.
Optionally, the instructing the terminal to switch to the MTC cell further includes: and acquiring the signal quality of a mobile network where the terminal is located, and if the signal quality of the mobile network meets a fifth preset condition, indicating the terminal to be switched to the mobile network.
Optionally, the issuing the information list of the MTC cell to the terminal includes: determining the position of the terminal according to the service cell of the terminal; and issuing an information list of the MTC cells within a preset range from the position of the terminal.
Optionally, the terminal is in a connected state.
An embodiment of the present invention further provides a cell switching apparatus, including: the information list issuing unit is suitable for issuing an information list of the MTC cell to a terminal so that the terminal can measure the signal quality of the MTC cell according to the information list of the MTC cell; the signal quality receiving unit is suitable for receiving the signal quality of the MTC cell reported by the terminal; the switching indication unit is suitable for determining the relation among the signal quality of the MTC cell, the signal quality of a service cell of the terminal and the signal quality of a neighboring cell, and when the relation among the signal quality of the MTC cell, the signal quality of a service cell of the terminal and the signal quality of the neighboring cell meets a first preset condition, the terminal is indicated to be switched to the MTC cell; and the service cell of the terminal is a non-MTC cell.
Optionally, the handover instructing unit is adapted to compare the signal quality of the MTC cell plus a preset offset with the signal quality of the serving cell and the signal quality of the neighboring cell, so as to determine a relationship between the signal quality of the MTC cell, the signal quality of the serving cell of the terminal, and the signal quality of the neighboring cell.
Optionally, the cell switching apparatus further includes a first determining unit, adapted to determine, before the sending the information list of the MTC cell to the terminal, that the signal quality of the serving cell and/or the signal-to-noise ratio of the serving cell meet a second preset condition.
Optionally, the cell switching apparatus further includes a second determining unit, adapted to determine that a relationship between the signal quality of the serving cell and the signal quality of the neighboring cell of the same system satisfies a third preset condition before issuing an information list of the MTC cell to the terminal after determining that the signal quality of the serving cell and/or the signal-to-noise ratio of the serving cell satisfy a second preset condition.
Optionally, the neighboring cells of the same system include a same-frequency neighboring cell and a different-frequency neighboring cell, and the second determining unit is adapted to determine that the same-frequency neighboring cell satisfies the third preset condition, and then determine that the different-frequency neighboring cell satisfies the third preset condition.
Optionally, the cell switching apparatus further includes: and the third determining unit is suitable for determining that the signal quality of the cell of the different system meets a fourth preset condition before issuing the information list of the MTC cell to the terminal after determining that the relationship between the signal quality of the service cell and the signal quality of the adjacent cell of the same system meets the third preset condition.
Optionally, the same system is selected from 2G, 3G, 4G and 5G mobile networks, and the different system is selected from 2G, 3G and 4G mobile networks and is different from the same system.
Optionally, the handover instructing unit is adapted to instruct the terminal to access the MTC cell in coverage enhanced mode a or coverage enhanced mode B.
Optionally, if the signal quality of the MTC cell is greater than or equal to a preset threshold, the handover instructing unit instructs the terminal to access the MTC cell in a coverage enhancement mode a; and when the signal quality of the MTC cell is smaller than a preset threshold value, indicating the terminal to access the MTC cell by adopting a coverage enhancement mode B.
Optionally, the serving cell of the terminal is selected from cells of 2G, 3G, 4G and 5G mobile networks.
Optionally, the cell switching apparatus further includes: and the rollback unit is suitable for acquiring the signal quality of the mobile network where the terminal is located, and if the signal quality of the mobile network meets a fifth preset condition, indicating the terminal to be switched to the mobile network.
Optionally, the information list issuing unit includes: a location determining subunit adapted to determine a location of the terminal according to a serving cell of the terminal; and the issuing subunit is suitable for issuing an information list of the MTC cell within a preset range from the position of the terminal.
Optionally, the terminal is in a connected state.
Compared with the prior art, the technical scheme of the embodiment of the invention has the following beneficial effects:
in the embodiment of the invention, the information list of the MTC cell is sent to the terminal, so that the terminal measures the signal quality of the MTC cell according to the information list of the MTC cell, after the signal quality of the MTC cell reported by the terminal is received, the relation among the signal quality of the MTC cell, the signal quality of the service cell of the terminal and the signal quality of the adjacent cell is determined, and when the relation among the signal quality of the MTC cell, the signal quality of the service cell of the terminal and the signal quality of the adjacent cell meets a first preset condition, the terminal is instructed to be switched to the MTC cell. A Machine Type Communication (MTC) cell is introduced in release 13/14 of the 3GPP protocol, and is a Communication cell for internet of things technology. In some scenarios, the MTC cell may have better communication quality than the cell of the mobile network, so when the communication quality of the cell of the mobile network is poor, the MTC cell information list is sent to the terminal and switched to the MTC cell, which may prevent the mobile terminal from being disconnected from the network and further improve the communication quality.
Furthermore, after adding a preset offset to the signal quality of the MTC cell, the signal quality of the MTC cell is compared with the signal quality of the serving cell and the signal quality of the adjacent cell, and because the MTC cell has stronger service capability under the condition of the same signal quality, the signal quality of the MTC cell is added with the preset offset and then compared with the signal quality of the serving cell and the signal quality of the adjacent cell, the service conditions of the MTC cell, the serving cell and the adjacent cell can be more objectively reflected, cell switching can be more accurately performed, the service interruption condition of the terminal can be further reduced, and the service quality of the terminal can be improved.
Further, if the signal quality of the MTC cell is greater than or equal to a preset threshold, the terminal is instructed to access the MTC cell in a coverage enhancement mode a, and if the signal quality of the MTC cell is less than the preset threshold, the terminal is instructed to access the MTC cell in a coverage enhancement mode B. Because the data transmission rate is higher in the coverage enhancement mode A, and the data transmission can be more accurately carried out in the coverage enhancement mode B, when the signal quality of the MTC cell is greater than or equal to the preset threshold value, the coverage enhancement mode A is adopted to access the MTC cell, so that the service processing can be more efficiently carried out, and when the signal quality of the MTC cell is less than the preset threshold value, the coverage enhancement mode B is adopted to access the MTC cell, so that the service processing can be more reliably carried out.
Drawings
Fig. 1 is a flow chart of a cell handover in an embodiment of the present invention;
FIG. 2 is a flowchart of one specific implementation of step S11 in FIG. 1;
fig. 3 is a schematic structural diagram of a cell switching apparatus according to an embodiment of the present invention;
fig. 4 is a schematic structural diagram of a specific implementation of the information list issuing unit 31 in fig. 3.
Detailed Description
As described in the background art, when the mobile terminal is located in a severe communication environment, it may happen that the signal quality of all cells is very poor, which may cause the current serving cell to be unable to continue to carry services and to meet the preset handover condition, which may further cause the mobile terminal to be offline and further cause a situation that communication cannot be performed.
MTC is introduced in release 13/14 of 3GPP protocol, and mainly aims at technology of internet of things, where the MTC may include Enhanced Machine Type Communication (EMTC) and micro Machine Type Communication (FeMTC), and an MTC cell may also be referred to as an internet of things cell.
When the MTC cell is initially designed, it is oriented to a Machine Type terminal, and the network side usually issues an information list of the MTC cell only to a Machine Type (Machine Type) terminal. MTC is based on LTE design, but in the present invention, for the sake of clarity and conciseness of expression, a "mobile network" is a 2G, 3G, 4G or 5G network other than MTC.
The inventor researches and discovers that the lowest signal-to-noise ratio of the EMTC/FeMTC communication can reach-15 dB, and the EMTC/FeMTC can also support the communication service of the terminal, such as VoLTE service.
In some scenarios, the MTC cell may have better communication quality than the cell of the mobile network, so when the communication quality of the cell of the mobile network is poor, the MTC cell information list is sent to the terminal and switched to the MTC cell, which may prevent the mobile terminal from being disconnected from the network and further improve the communication quality.
In order to make the aforementioned objects, features and advantages of the present invention comprehensible, embodiments accompanied with figures are described in detail below.
Fig. 1 is a flowchart of cell handover in an embodiment of the present invention, which may specifically include:
in step S11, an information list of an MTC cell is issued to a terminal, so that the terminal measures the signal quality of the MTC cell according to the information list of the MTC cell;
step S12, receiving the signal quality of the MTC cell reported by the terminal;
step S13, determining the relation among the signal quality of the MTC cell, the signal quality of the service cell of the terminal and the signal quality of the adjacent cell, and when the relation among the three meets a first preset condition, indicating the terminal to switch to the MTC cell;
the serving cell of the terminal is a non-MTC cell, and the terminal may be a non-machine type terminal, for example, may be a user equipment such as a mobile phone which is mainly used for communication.
The cell switching method in the embodiment of the invention can be applied to a network side, the network side indicates the terminal to perform cell switching, and the MTC cell is also used as a target cell to which the terminal can be switched, so that the cell switching reliability can be improved, the terminal off-line condition is reduced, and the communication service interruption of the terminal in the connected state is further avoided.
The serving cell of the terminal may be selected from cells of 2G, 3G, 4G, and 5G mobile networks, and the serving cell is a cell in which the terminal performs a current communication service. Here, the 2G, 3G, 4G and 5G mobile networks shall be interpreted as expanding, and include so-called 2G communication system, 2.5G communication system, 2.75G communication system and 3G communication system, 3.5G communication system, 3.75G communication system, LTE mobile networks of different standards, and different 5G networks.
Referring to fig. 2, a specific implementation of step S11 may include the following steps:
step S111, determining the position of the terminal according to the service cell of the terminal;
step S112, an information list of the MTC cells within a preset range from the position of the terminal is issued.
The location of the terminal may be a specific geographic location, or may be a location in a network, as long as the MTC cell that may be used for the terminal to access may be determined according to the location of the terminal and a preset range.
The preset range may be set according to an empirical value, or may be set with a physical distance as the preset range, for example, MTC cells within a preset radius are selected with the position of the terminal as the center, and an information list of the cells is issued; or the number of MTC cells may be set in units, for example, the MTC cell corresponding to the serving cell of the terminal may be used as a center, the cell and the MTC cells adjacent to the cell are selected, and an information list of the cells is issued.
With continued reference to fig. 1, the information list of the MTC cell may include IDs and frequency points of one or more MTC cells. In the specific implementation of step S11, after the network side issues the information list of the MTC cell to the terminal, the terminal may measure the MTC cell according to the information in the MTC cell list to obtain the signal quality of the MTC cell, and report the measurement result to the network side.
In the specific implementation of steps S12 and S13, after receiving the signal quality of the MTC cell reported by the terminal, the network side may determine a relationship among the signal quality of the MTC cell, the signal quality of the serving cell of the terminal, and the signal quality of the neighboring cell, and instruct the terminal to switch to the MTC cell when the relationship among the three satisfies a first preset condition.
The first preset condition is used for indicating that a service cell and a neighboring cell of the terminal are not suitable for carrying out communication service, and the MTC cell is suitable for carrying out communication service. Here, the neighboring cells include a same-frequency neighboring cell, a different-frequency neighboring cell, a same-system cell, and a different-system cell of the serving cell.
For example, the first preset condition may include that signal quality of a serving cell and a neighboring cell of the terminal is lower than a first threshold, and signal quality of the MTC cell is higher than a second threshold, where the first threshold and the second threshold may be empirical values, and the first threshold may be different from the second threshold.
The first preset condition may further include a relationship between a serving cell, a neighboring cell, and an MTC cell, and specifically, the first preset condition may include: and after adding the preset offset to the signal quality of the MTC cell, comparing the signal quality of the MTC cell with the signal quality of the serving cell and the signal quality of the adjacent cell, wherein the value of the signal quality of the MTC cell after adding the preset offset is larger than the value of the signal quality of the serving cell and the signal quality of the adjacent cell.
Under the condition of the same signal quality, the MTC cell has stronger service capability, so that the signal quality of the MTC cell is added with the preset bias and then is compared with the signal quality of the service cell and the signal quality of the adjacent cell, the service conditions of the MTC cell, the service cell and the adjacent cell can be more objectively reflected, and the cell switching can be more accurately carried out.
If the signal quality of the MTC cell is not compared with the signal quality by adding the preset offset, it may happen that neither the serving cell nor the neighboring cell can support the terminal to perform normal service processing, and the MTC cell can support the terminal to perform service processing.
Therefore, the signal quality of the MTC cell is added with the preset bias and then compared with the signal quality of the service cell and the signal quality of the adjacent cell, the condition of terminal service interruption can be reduced, and the service quality of the terminal is improved.
After the judgment, the terminal can be instructed to switch to the MTC cell after the relation between the terminal and the MTC cell is determined to meet the first preset condition. The terminal may be instructed to access the MTC cell in Coverage enhanced mode a (CE modeA) or Coverage enhanced mode B (CE modeB).
Specifically, whether the signal quality of the MTC cell is greater than or equal to a preset threshold may be determined, if so, the terminal is instructed to access the MTC cell in the coverage enhancement mode a, and if the signal quality of the MTC cell is less than the preset threshold, the terminal is instructed to access the MTC cell in the coverage enhancement mode B.
Because the data transmission rate is higher in the coverage enhancement mode A, and the data transmission can be more accurately carried out in the coverage enhancement mode B, when the signal quality of the MTC cell is greater than or equal to the preset threshold value, the coverage enhancement mode A is adopted to access the MTC cell, so that the service processing can be more efficiently carried out, and when the signal quality of the MTC cell is less than the preset threshold value, the coverage enhancement mode B is adopted to access the MTC cell, so that the service processing can be more reliably carried out.
As described above, the network side generally issues only the information list of the cell of the mobile network to the terminal instead of issuing the information list of the MTC cell to the terminal. In this embodiment of the present invention, before step S11, the method may further include determining the signal quality of the mobile network.
Specifically, before step S11, steps S14 to S16 may also be included.
In step S14, it is determined that the signal quality of the serving cell and/or the signal-to-noise ratio of the serving cell meet a second preset condition.
The second preset condition is used for indicating that the serving cell is not suitable for service processing, and may be indicated by a given signal quality range or a given signal-to-noise ratio range.
In step S15, it is determined that the relationship between the signal quality of the serving cell and the signal quality of the neighboring cell of the same system satisfies a third preset condition.
The third preset condition is used for indicating that the service cell is not suitable for being switched to the adjacent cell, and the third preset condition can indicate through the range of the signal quality of the adjacent cell and/or the relation between the signal quality of the adjacent cell and the signal quality of the service cell.
The neighboring cells may include a common-frequency neighboring cell and an inter-frequency neighboring cell, and when determining the relation between the signal quality of the serving cell and the signal quality of the common-frequency neighboring cell, it may be determined that the signal quality of the serving cell and the signal quality of the common-frequency neighboring cell satisfy a third preset condition, and then it is determined that the signal quality of the serving cell and the signal quality of the inter-frequency neighboring cell satisfy the third preset condition.
In step S16, it is determined that the signal quality of the cell of the inter-system meets a fourth preset condition.
The fourth preset condition is used for indicating that the different system cell is not suitable for service processing. The peer system is the same system as the system where the serving cell of the terminal is located, and may be selected from 2G, 3G, 4G and 5G mobile networks, and the peer system may be selected from 2G, 3G and 4G mobile networks and is different from the peer system.
In a specific implementation, the steps S14 to S16 may be sequentially performed, only the steps S14 and S15 may be sequentially performed, or a determination may be made in another manner to determine that the serving cell is not suitable for performing service processing and the terminal is not suitable for switching from the serving cell to a neighboring cell of the same system or a different system.
After the network side indicates the terminal to switch to the MTC cell, the terminal may monitor the signal quality of the mobile network to switch back to the mobile network. That is, the embodiment of the present invention may further include step S17, where if the signal quality of the mobile network meets a fifth preset condition, the terminal is instructed to switch to the mobile network. The fifth preset condition is used for indicating that the mobile network is suitable for service processing, and may be a condition opposite to the second preset condition.
In the embodiment of the present invention, the second preset condition, the third preset condition, the fourth preset condition, and the fifth preset condition may all be compatible with an existing protocol, and an existing judgment event in the protocol is used for judgment.
For example, the second preset condition may be set using event a2, the third preset condition may be set using event A3, event a4, and event a5, the fourth preset condition may be set using event B2, the first preset condition may be set using event B2, and the fifth preset condition may be set using event a2 among the measurement events of LTE. The threshold value in each handover event may be set as desired.
Wherein: event a2 is that the Serving cell signal quality is below a threshold (Serving cells network threshold);
event a3 is the signal quality of the co-frequency neighbors is higher than the signal quality of the serving cell (neighbor cells offset between the primary PCell/PSCell);
event a4 is that the pilot neighbor signal quality is above a threshold (neighbor times threshold);
event a5 is that serving cell signal quality is below a certain threshold and neighbor cell signal quality is above a certain threshold (PCell/PSCell beacons word threshold1 and neighbor beacons beta threshold 2);
event B2 is that the serving cell signal quality is below a certain threshold and the neighbor cell signal quality is above a certain threshold (PCell times word threshold1 and inter RAT neighbor times threshold 2).
In an embodiment of the present invention, it may be determined that the event a2 occurs in step S14, so as to determine that the signal quality of the serving cell and/or the signal-to-noise ratio of the serving cell meet a second preset condition; determining that the events A3, a4 and a5 do not occur in step S15 to determine that the relationship between the signal quality of the serving cell and the signal quality of the neighbor cell of the same system satisfies a third preset condition; it is determined in step S16 that the event B2 does not occur to determine that the signal quality of the cell of the inter-system meets the fourth preset condition. At this time, steps S11 to S12 are executed, and in step S13, the MTC cell is taken as a cell of the heterogeneous system to determine again whether an event B2 occurs, and if the event B2 occurs, the first preset condition is satisfied, and the terminal is instructed to switch to the MTC cell.
When the terminal performs a service in the MTC cell, the terminal monitors the signal quality of the mobile network, and if an event a2 occurs, the terminal is instructed to switch to the mobile network, where the fifth preset condition in step S17 is satisfied.
The setting manner of the first to fifth preset conditions in the embodiment of the present invention is not limited to the above example, and may be flexibly set as needed.
For example, if steps S15 to S16 are not performed before step S11 is performed, the first preset condition may include: event a2 occurs, and event B2 occurs when the MTC cell is determined to be a foreign system cell.
It is understood by those skilled in the art that, when the serving cell is a cell of a 4G network, the MTC cell may also be an inter-frequency neighboring cell of the serving cell, and the event a4 is used to set a first preset condition, for example, the first preset condition is: event a2 occurs, and event a4 occurs.
Because the switching conditions in the embodiment of the invention can be set by using the existing switching event, the cell switching method in the embodiment of the invention can be compatible with the existing protocol, and has the advantages of lower application cost and wider application scene.
In the embodiment of the invention, the information list of the MTC cell is sent to the terminal, so that the terminal measures the signal quality of the MTC cell according to the information list of the MTC cell, after the signal quality of the MTC cell reported by the terminal is received, the relation among the signal quality of the MTC cell, the signal quality of the service cell of the terminal and the signal quality of the adjacent cell is determined, and when the relation among the signal quality of the MTC cell, the signal quality of the service cell of the terminal and the signal quality of the adjacent cell meets a first preset condition, the terminal is instructed to be switched to the MTC cell. The machine type communication cell is introduced in release 13/14 of the 3GPP protocol, and is a communication cell for the technology of internet of things. In some scenarios, the MTC cell may have better communication quality than the cell of the mobile network, so when the communication quality of the cell of the mobile network is poor, the MTC cell information list is sent to the terminal and switched to the MTC cell, which may prevent the mobile terminal from being disconnected from the network and further improve the communication quality.
An embodiment of the present invention further provides a cell switching apparatus, and a schematic structural diagram of the cell switching apparatus is shown in fig. 3, where the cell switching apparatus may include:
the information list issuing unit 31 is adapted to issue an information list of the MTC cell to a terminal, so that the terminal measures the signal quality of the MTC cell according to the information list of the MTC cell;
a signal quality receiving unit 32, adapted to receive the signal quality of the MTC cell reported by the terminal;
a handover indication unit 33, adapted to determine a relationship among the signal quality of the MTC cell, the signal quality of the serving cell of the terminal, and the signal quality of the neighboring cell, and indicate that the terminal is handed over to the MTC cell when the relationship among the three satisfies a first preset condition;
and the service cell of the terminal is a non-MTC cell.
In a specific implementation, the handover instructing unit 33 is adapted to compare the signal quality of the MTC cell with the signal quality of the serving cell and the signal quality of the neighboring cell after adding a preset offset, so as to determine a relationship between the signal quality of the MTC cell, the signal quality of the serving cell of the terminal, and the signal quality of the neighboring cell.
In a specific implementation, the cell switching apparatus may further include a first determining unit 34, adapted to determine that the signal quality of the serving cell and/or the signal-to-noise ratio of the serving cell meet a second preset condition before the sending the information list of the MTC cell to the terminal.
In a specific implementation, the cell switching apparatus may further include a second determining unit 35, adapted to determine that a relationship between the signal quality of the serving cell and the signal quality of the neighboring cell of the same system satisfies a third preset condition before issuing an information list of the MTC cell to the terminal after determining that the signal quality of the serving cell and/or the signal-to-noise ratio of the serving cell satisfy a second preset condition.
In a specific implementation, the neighboring cells of the same system include a same-frequency neighboring cell and a different-frequency neighboring cell, and the second determining unit 35 is adapted to determine that the same-frequency neighboring cell meets the third preset condition, and then determine that the different-frequency neighboring cell meets the third preset condition.
In a specific implementation, the cell switching apparatus may further include: a third determining unit 36, adapted to determine that the signal quality of the cell of the different system meets a fourth preset condition before issuing the information list of the MTC cell to the terminal after determining that the relationship between the signal quality of the serving cell and the signal quality of the neighboring cell of the same system meets the third preset condition.
In a specific implementation, the same system may be selected from 2G, 3G, 4G and 5G mobile networks, and the different system is selected from 2G, 3G and 4G mobile networks and is different from the same system.
In a specific implementation, the handover instructing unit 33 is adapted to instruct the terminal to access the MTC cell in coverage enhanced mode a or coverage enhanced mode B.
In a specific implementation, the handover instructing unit 33 instructs the terminal to access the MTC cell in a coverage enhanced mode a if the signal quality of the MTC cell is greater than or equal to a preset threshold;
and when the signal quality of the MTC cell is smaller than a preset threshold value, indicating the terminal to access the MTC cell by adopting a coverage enhancement mode B.
In a specific implementation, the serving cell of the terminal may be selected from cells of 2G, 3G, 4G and 5G mobile networks.
In a specific implementation, the cell switching apparatus may further include: a fallback unit 37, adapted to obtain a signal quality of a mobile network where the terminal is located, and instruct the terminal to switch to the mobile network if the signal quality of the mobile network meets a fifth preset condition.
Referring to fig. 4, in a specific implementation, the information list issuing unit 31 includes:
a location determining subunit 311 adapted to determine a location of the terminal according to a serving cell of the terminal;
the issuing subunit 312 is adapted to issue an information list of the MTC cells within a preset range from the terminal.
In a specific implementation, the terminal may be a non-machine type terminal, and the terminal is in a connected state.
The cell switching apparatus in the embodiment of the present invention may be configured in the base station. The principle, specific implementation and beneficial effects of the cell switching apparatus in the embodiment of the present invention may refer to a cell switching method, which is not described herein again.
Those skilled in the art will appreciate that all or part of the steps in the methods of the above embodiments may be implemented by associated hardware instructed by a program, which may be stored in a computer-readable storage medium, and the storage medium may include: ROM, RAM, magnetic or optical disks, and the like.
Although the present invention is disclosed above, the present invention is not limited thereto. Various changes and modifications may be effected therein by one skilled in the art without departing from the spirit and scope of the invention as defined in the appended claims.
Claims (24)
1. A method of cell handover, comprising:
issuing an information list of the MTC cell to a terminal so that the terminal can measure the signal quality of the MTC cell according to the information list of the MTC cell;
receiving the signal quality of the MTC cell reported by the terminal;
determining the relation among the signal quality of the MTC cell, the signal quality of a service cell of the terminal and the signal quality of an adjacent cell, and indicating the terminal to be switched to the MTC cell when the relation among the signal quality of the MTC cell, the signal quality of a service cell of the terminal and the signal quality of the adjacent cell meets a first preset condition;
the service cell of the terminal is a non-MTC cell, and the terminal is a non-machine type terminal;
after the terminal is instructed to be switched to the MTC cell, the method further comprises the following steps: acquiring the signal quality of a mobile network where the terminal is located, and if the signal quality of the mobile network meets a fifth preset condition, indicating the terminal to be switched to the mobile network;
the fifth preset condition is used for indicating that the mobile network is suitable for service processing, and the mobile network is a 2G, 3G, 4G or 5G network except MTC.
2. The cell switching method according to claim 1, wherein the determining the relationship between the signal quality of the MTC cell, the signal quality of the serving cell of the terminal, and the signal quality of the neighboring cell comprises:
and comparing the signal quality of the MTC cell with the signal quality of the service cell and the signal quality of the adjacent cell after adding a preset bias.
3. The cell switching method according to claim 1, wherein before the sending the information list of the MTC cell to the terminal, the method further comprises: and determining that the signal quality of the serving cell and/or the signal-to-noise ratio of the serving cell meet a second preset condition.
4. The cell switching method according to claim 3, wherein before issuing an information list of MTC cells to a terminal after determining that the signal quality of the serving cell and/or the signal-to-noise ratio of the serving cell meet a second preset condition, the method further comprises:
and determining that the relation between the signal quality of the service cell and the signal quality of the adjacent cell of the same system meets a third preset condition.
5. The cell switching method according to claim 4, wherein the neighboring cells of the same system include an intra-frequency neighboring cell and an inter-frequency neighboring cell, and the determining that the relationship between the signal quality of the serving cell and the signal quality of the neighboring cells of the same system satisfies a third preset condition includes: and after the same-frequency adjacent cell is determined to meet the third preset condition, determining the different-frequency adjacent cell to meet the third preset condition.
6. The cell switching method according to claim 4, wherein after determining that the relationship between the signal quality of the serving cell and the signal quality of the neighboring cell of the same system satisfies the third preset condition, before issuing an information list of an MTC cell to a terminal, the method further comprises: and determining that the signal quality of the cell of the different system meets a fourth preset condition.
7. The cell handover method of claim 6, wherein the same system is selected from 2G, 3G, 4G and 5G mobile networks, and the different system is selected from 2G, 3G and 4G mobile networks and is different from the same system.
8. The cell switching method according to claim 1, wherein the instructing the terminal to switch to the MTC cell comprises: and instructing the terminal to access the MTC cell in a coverage enhancement mode A or a coverage enhancement mode B.
9. The cell switching method according to claim 8, wherein instructing the terminal to access the MTC cell in coverage enhanced mode a or coverage enhanced mode B comprises:
if the signal quality of the MTC cell is greater than or equal to a preset threshold value, indicating the terminal to access the MTC cell in a coverage enhancement mode A;
and if the signal quality of the MTC cell is smaller than a preset threshold value, indicating the terminal to access the MTC cell by adopting a coverage enhancement mode B.
10. The cell handover method according to claim 1, wherein the serving cell of the terminal is selected from cells of 2G, 3G, 4G and 5G mobile networks.
11. The cell switching method according to claim 1, wherein the issuing an information list of MTC cells to the terminal comprises:
determining the position of the terminal according to the service cell of the terminal;
and issuing an information list of the MTC cells within a preset range from the position of the terminal.
12. The cell switching method according to claim 1, wherein the terminal is in a connected state.
13. A cell switching apparatus, comprising:
the information list issuing unit is suitable for issuing an information list of the MTC cell to a terminal so that the terminal can measure the signal quality of the MTC cell according to the information list of the MTC cell;
the signal quality receiving unit is suitable for receiving the signal quality of the MTC cell reported by the terminal;
the switching indication unit is suitable for determining the relation among the signal quality of the MTC cell, the signal quality of a service cell of the terminal and the signal quality of a neighboring cell, and when the relation among the signal quality of the MTC cell, the signal quality of a service cell of the terminal and the signal quality of the neighboring cell meets a first preset condition, the terminal is indicated to be switched to the MTC cell;
the service cell of the terminal is a non-MTC cell, and the terminal is a non-machine type terminal;
further comprising: a fallback unit, adapted to obtain signal quality of a mobile network where the terminal is located, and if the signal quality of the mobile network meets a fifth preset condition, instruct the terminal to switch to the mobile network;
the fifth preset condition is used for indicating that the mobile network is suitable for service processing, and the mobile network is a 2G, 3G, 4G or 5G network except MTC.
14. The cell switching apparatus according to claim 13, wherein the handover instructing unit is adapted to compare the signal quality of the MTC cell plus a preset offset with the signal quality of the serving cell and the signal quality of the neighboring cell to determine a relationship between the signal quality of the MTC cell, the signal quality of the serving cell of the terminal, and the signal quality of the neighboring cell.
15. The cell switching apparatus according to claim 13, further comprising a first determining unit adapted to determine that the signal quality of the serving cell and/or the signal-to-noise ratio of the serving cell meet a second preset condition before the sending the information list of MTC cells to the terminal.
16. The cell switching apparatus according to claim 15, further comprising a second determining unit, adapted to determine that a relationship between the signal quality of the serving cell and the signal quality of the neighboring cell of the same system satisfies a third preset condition before issuing an information list of MTC cells to a terminal after determining that the signal quality of the serving cell and/or the signal-to-noise ratio of the serving cell satisfy a second preset condition.
17. The cell switching apparatus according to claim 16, wherein the neighboring cells of the same system include a same-frequency neighboring cell and an inter-frequency neighboring cell, and the second determining unit is adapted to determine that the same-frequency neighboring cell satisfies the third preset condition, and then determine that the inter-frequency neighboring cell satisfies the third preset condition.
18. The cell switching apparatus according to claim 16, further comprising: and the third determining unit is suitable for determining that the signal quality of the cell of the different system meets a fourth preset condition before issuing the information list of the MTC cell to the terminal after determining that the relationship between the signal quality of the service cell and the signal quality of the adjacent cell of the same system meets the third preset condition.
19. The cell switching apparatus of claim 18, wherein the same system is selected from 2G, 3G, 4G and 5G mobile networks, and the different system is selected from 2G, 3G and 4G mobile networks and is different from the same system.
20. The cell switching apparatus according to claim 13, wherein the switching instruction unit is adapted to instruct the terminal to access the MTC cell in coverage enhanced mode a or coverage enhanced mode B.
21. The cell switching apparatus according to claim 20, wherein the handover instructing unit instructs the terminal to access the MTC cell in coverage enhanced mode a if the signal quality of the MTC cell is greater than or equal to a preset threshold;
and when the signal quality of the MTC cell is smaller than a preset threshold value, indicating the terminal to access the MTC cell by adopting a coverage enhancement mode B.
22. The cell switching apparatus according to claim 13, wherein the serving cell of the terminal is selected from cells of 2G, 3G, 4G and 5G mobile networks.
23. The cell switching apparatus of claim 13, wherein the information list issuing unit comprises:
a location determining subunit adapted to determine a location of the terminal according to a serving cell of the terminal;
and the issuing subunit is suitable for issuing an information list of the MTC cell within a preset range from the position of the terminal.
24. The cell switching apparatus according to claim 13, wherein the terminal is in a connected state.
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| CN111565428B (en) * | 2019-02-14 | 2022-10-25 | 华为技术有限公司 | Cell reselection method and device |
| CN110300435A (en) * | 2019-05-21 | 2019-10-01 | 努比亚技术有限公司 | A kind of communication pattern switching method, terminal and computer readable storage medium |
| WO2021015561A1 (en) * | 2019-07-25 | 2021-01-28 | Lg Electronics Inc. | Method and apparatus for measurement reporting during a conditional pcell handover in a wireless communication system |
| EP4084405A4 (en) * | 2020-01-06 | 2023-03-29 | Guangdong Oppo Mobile Telecommunications Corp., Ltd. | Service switching method, terminal, and network device |
| CN114071625B (en) * | 2021-11-05 | 2023-07-18 | 中国联合网络通信集团有限公司 | Cell switching method, user equipment and storage medium |
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