CN112888034A - Directional switching method, device, storage medium and base station - Google Patents
Directional switching method, device, storage medium and base station Download PDFInfo
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- CN112888034A CN112888034A CN201911204849.XA CN201911204849A CN112888034A CN 112888034 A CN112888034 A CN 112888034A CN 201911204849 A CN201911204849 A CN 201911204849A CN 112888034 A CN112888034 A CN 112888034A
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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
- H04W36/0011—Control or signalling for completing the hand-off for data sessions of end-to-end connection
- H04W36/0016—Hand-off preparation specially adapted for end-to-end data sessions
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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
- H04W36/32—Reselection being triggered by specific parameters by location or mobility data, e.g. speed data
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W36/00—Hand-off or reselection arrangements
- H04W36/34—Reselection control
- H04W36/38—Reselection control by fixed network equipment
- H04W36/385—Reselection control by fixed network equipment of the core network
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W4/00—Services specially adapted for wireless communication networks; Facilities therefor
- H04W4/30—Services specially adapted for particular environments, situations or purposes
- H04W4/40—Services specially adapted for particular environments, situations or purposes for vehicles, e.g. vehicle-to-pedestrians [V2P]
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W4/00—Services specially adapted for wireless communication networks; Facilities therefor
- H04W4/30—Services specially adapted for particular environments, situations or purposes
- H04W4/40—Services specially adapted for particular environments, situations or purposes for vehicles, e.g. vehicle-to-pedestrians [V2P]
- H04W4/42—Services specially adapted for particular environments, situations or purposes for vehicles, e.g. vehicle-to-pedestrians [V2P] for mass transport vehicles, e.g. buses, trains or aircraft
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Abstract
In the technical solutions of a method, an apparatus, a storage medium and a base station for directional handover provided by the embodiments of the present invention, calculating the moving speed of the terminal according to the user frequency offset value, judging that the moving speed of the terminal exceeds a preset high-speed threshold value, determining the moving direction of the terminal by obtaining the cell access information of the terminal, determining an error cell from the preset private network cells according to the moving direction of the terminal and the position information of the terminal obtained in advance, determining switchable cells according to private network cells and error cells, sending directional switching instructions to the terminal, so that the terminal switches to the selected switchable cell according to the location information of the terminal and the information of the switchable cell, therefore, the directional switching of the network can be realized in special networking scenes such as bifurcation or multi-line intersection in high-speed or high-speed rail networking, and the problem that a user can not switch back to a correct cell after switching to a wrong cell is solved.
Description
[ technical field ] A method for producing a semiconductor device
The present invention relates to the field of communications technologies, and in particular, to a directional handover method, apparatus, storage medium, and base station.
[ background of the invention ]
Due to the uniqueness and rapidity of highways or high-speed rails, communication carriers typically use private network coverage. However, in high-speed or high-speed rail networking, there are cases where lines cross, and special networking scenes such as a scene where lines diverge or multiple lines intersect are formed. In the related art, the scheme of performing directional switching in a high-speed environment is not applicable to special scenes such as a three-way intersection or a four-way intersection in a high-speed networking. Therefore, a scheme which can be suitable for realizing the directional switching of the network in special networking scenes such as bifurcation or multi-line intersection in high-speed or high-speed rail networking is lacked in the prior art, and the problem that a user can not switch back to a correct cell after switching to a wrong cell is solved.
[ summary of the invention ]
In view of this, the present invention provides a directional switching method, an apparatus, a storage medium, and a base station, which can be applied to implement directional switching of a network in a special networking scenario such as a bifurcation or a multi-line intersection in a high-speed or high-speed rail networking, thereby avoiding a problem that a user cannot switch back to a correct cell after switching to a wrong cell.
In one aspect, an embodiment of the present invention provides a directional handover method, including:
calculating the moving speed of the terminal according to the user frequency offset value;
judging whether the moving speed of the terminal is greater than or equal to a preset high-speed threshold value or not;
if the moving speed of the terminal is judged to be greater than or equal to a preset high-speed threshold value, determining the moving direction of the terminal from cell access information of the terminal;
determining an error cell from preset private network cells according to the moving direction of the terminal and position information of the terminal acquired in advance;
determining a switchable cell according to the private network cell and the error cell;
and sending a directional switching instruction to a terminal, wherein the directional switching instruction carries information of the switchable cell, so that the terminal is switched to the selected switchable cell according to the position information of the terminal and the information of the switchable cell.
Optionally, the calculating the moving speed of the terminal according to the user frequency offset value includes:
acquiring user frequency offset values periodically reported by the terminal, and calculating Doppler frequency shift according to the user frequency offset values of adjacent periods;
calculating an angle between the moving direction of the terminal and the signal propagation direction of the base station according to the distance between the terminal and the base station and the signal propagation direction of the base station which are obtained in advance;
according to the calculation formula of Doppler frequency shift:
and calculating the moving speed v of the terminal, wherein delta f is Doppler frequency shift, f is carrier frequency, c is electromagnetic wave propagation speed, v is the moving speed of the terminal, and theta is an angle between the moving direction of the terminal and the signal propagation direction of the base station.
Optionally, before determining the moving direction of the terminal from the cell access information of the terminal, the method includes:
and acquiring the cell access information of the terminal through X2 interface signaling.
Optionally, the cell access information includes road identification information of a private network cell to which the terminal is connected and direction identification information of the private network cell to which the terminal is connected.
The determining the moving direction of the terminal from the cell access information of the terminal includes:
inquiring the road identification of the private network cell connected with the terminal from the cell access information of the terminal;
if the number of private network cells with the same road identifier is larger than or equal to a preset threshold value, determining the extending direction of the road identified by the same road identifier according to the direction identifier information of the private network cells with the same road identifier connected with the terminal;
and determining the moving direction of the terminal as the moving direction of the terminal according to the extending direction of the road identified by the same road identification and the direction of the driving route acquired in advance.
Optionally, the determining, according to the moving direction of the terminal and the position information of the terminal obtained in advance, an error cell from a preset private network cell includes:
determining scene information of the terminal according to pre-acquired position information of the terminal and pre-acquired line information, wherein the scene information comprises a turnout-free scene or a turnout scene;
and if the terminal is judged to be in the scene with the fork according to the scene information, determining that the private network cell in other directions except the moving direction of the terminal is an error cell according to the moving direction of the terminal.
Optionally, before the determining the switchable cell according to the private network cell and the wrong cell, the method further includes:
acquiring a first cell switching request reported by the terminal, wherein the first cell switching request carries information of a private network cell;
the determining a switchable cell according to the private network cell and the error cell includes:
and eliminating the error cell from the private network cell corresponding to the information of the private network cell, and determining the remaining private network cells as the switchable cells.
Optionally, the determining a switchable cell according to the private network cell and the wrong cell includes:
configuring individual offset parameters of the cells for the wrong cells, and sending RRC connection reconfiguration information to the terminal so that the terminal generates a second cell switching request according to the RRC connection reconfiguration information;
acquiring a second cell switching request reported by the terminal, wherein the second cell switching request carries information of a private network cell;
and determining the switchable cell corresponding to the information of the private network cell as the switchable cell.
In another aspect, an embodiment of the present invention provides a directional switching apparatus, where the apparatus includes:
the calculation module is used for calculating the moving speed of the terminal according to the user frequency offset value;
the judging module is used for judging whether the moving speed of the terminal is greater than or equal to a preset high-speed threshold value or not;
the determining module is used for determining the moving direction of the terminal from the cell access information of the terminal if the judging module judges that the moving speed of the terminal is greater than or equal to a preset high-speed threshold value; determining an error cell from preset private network cells according to the moving direction of the terminal and position information of the terminal acquired in advance; determining a switchable cell according to the private network cell and the error cell;
and the sending module is used for sending a directional switching instruction to the terminal, wherein the directional switching instruction carries information of the switchable cell, so that the terminal is switched to the selected switchable cell according to the position information of the terminal and the information of the switchable cell.
On the other hand, an embodiment of the present invention provides a storage medium, where the storage medium includes a stored program, and when the program runs, a device in which the storage medium is located is controlled to execute the above-mentioned directional switching method.
In another aspect, an embodiment of the present invention provides a base station, including a memory and a processor, where the memory is used to store information including program instructions, and the processor is used to control execution of the program instructions, and the program instructions are loaded by the processor and execute the steps of the above-mentioned directional switching method.
In the technical scheme provided by the embodiment of the invention, the moving speed of the terminal is calculated according to the frequency offset value of the user, after judging that the moving speed of the terminal exceeds a preset high-speed threshold value, determining the moving direction of the terminal by acquiring cell access information of the terminal, and determines an error cell from the preset private network cells according to the moving direction of the terminal and the position information of the terminal acquired in advance, determining switchable cells according to private network cells and error cells, sending directional switching instructions to the terminal, so that the terminal switches to the selected switchable cell according to the location information of the terminal and the information of the switchable cell, therefore, the directional switching of the network can be realized in special networking scenes such as bifurcation or multi-line intersection in high-speed or high-speed rail networking, and the problem that a user can not switch back to a correct cell after switching to a wrong cell is solved.
[ description of the drawings ]
In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings needed to be used in the embodiments will be briefly described below, and it is obvious that the drawings in the following description are only some embodiments of the present invention, and it is obvious for those skilled in the art to obtain other drawings based on these drawings without inventive labor.
Fig. 1 is a flowchart of a directional handover method according to an embodiment of the present invention;
fig. 2 is a flowchart of a directional handover method according to another embodiment of the present invention;
fig. 3 is a schematic view of a scenario of an angle between a moving direction of a terminal and a propagation direction of a base station signal according to an embodiment of the present invention;
fig. 4 is a scene schematic diagram of a three-way intersection scene according to an embodiment of the present invention;
fig. 5 is a scene schematic diagram of a four-way intersection scene according to an embodiment of the present invention;
fig. 6 is a schematic structural diagram of a directional switch device according to an embodiment of the present invention;
fig. 7 is a schematic diagram of a base station according to an embodiment of the present invention.
[ detailed description ] embodiments
For better understanding of the technical solutions of the present invention, the following detailed descriptions of the embodiments of the present invention are provided with reference to the accompanying drawings.
It should be understood that the described embodiments are only some embodiments of the invention, and not all embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
The terminology used in the embodiments of the invention is for the purpose of describing particular embodiments only and is not intended to be limiting of the invention. As used in the examples of the present invention and the appended claims, the singular forms "a," "an," and "the" are intended to include the plural forms as well, unless the context clearly indicates otherwise.
It should be understood that the term "and/or" as used herein is merely one type of associative relationship that describes an associated object, meaning that three types of relationships may exist, e.g., A and/or B, may mean: a exists alone, A and B exist simultaneously, and B exists alone. In addition, the character "/" herein generally indicates that the former and latter related objects are in an "or" relationship.
Fig. 1 is a flowchart of a directional handover method according to an embodiment of the present invention, as shown in fig. 1, the method includes:
and step 101, calculating the moving speed of the terminal according to the user frequency offset value.
And 102, judging whether the moving speed of the terminal is greater than or equal to a preset high-speed threshold value.
And 103, if the moving speed of the terminal is judged to be greater than or equal to the preset high-speed threshold value, determining the moving direction of the terminal from the cell access information of the terminal.
And step 104, determining an error cell from the preset private network cells according to the moving direction of the terminal and the position information of the terminal acquired in advance.
And 105, determining a switchable cell according to the private network cell and the error cell.
And 106, sending a directional switching instruction to the terminal, wherein the directional switching instruction carries information of the switchable cell, so that the terminal is switched to the selected switchable cell according to the position information of the terminal and the information of the switchable cell.
In the technical scheme provided by the embodiment of the invention, the moving speed of the terminal is calculated according to the frequency offset value of the user, after judging that the moving speed of the terminal exceeds a preset high-speed threshold value, determining the moving direction of the terminal by acquiring cell access information of the terminal, and determines an error cell from the preset private network cells according to the moving direction of the terminal and the position information of the terminal acquired in advance, determining switchable cells according to private network cells and error cells, sending directional switching instructions to the terminal, so that the terminal switches to the selected switchable cell according to the location information of the terminal and the information of the switchable cell, therefore, the directional switching of the network can be realized in special networking scenes such as bifurcation or multi-line intersection in high-speed or high-speed rail networking, and the problem that a user can not switch back to a correct cell after switching to a wrong cell is solved.
Fig. 2 is a flowchart of a directional handover method according to another embodiment of the present invention, as shown in fig. 2, the method includes:
In the embodiment of the invention, each step is executed by the base station.
In the embodiment of the present invention, for example, a Measurement Report (MR for short) reported every 5s by a terminal is obtained, where the Measurement Report includes information such as a user frequency offset value and location information of the terminal. And calculating the Doppler frequency shift by acquiring the user frequency offset values of adjacent periods. For example, the user frequency offset value reported by the acquisition terminal at 8:00:00 is f1, and the user frequency offset value reported by the acquisition terminal at 8:00:05 is f2, so that the calculated doppler shift is f1-f 2.
Step 202, calculating an angle between the moving direction of the terminal and the signal propagation direction of the base station according to the distance between the terminal and the base station and the signal propagation direction of the base station, which are acquired in advance.
In the embodiment of the present invention, for example, as shown in fig. 3, the distance between the terminal S2 and the base station S1 is d, the propagation direction of the base station signal is S1 to S2, and the distance d0 between the propagation directions of the base station signals S1 to S2 is calculated by calculation
Thereby calculating an angle theta between the moving direction of the terminal and the propagation direction of the base station signal.
In the embodiment of the invention, Δ f is a doppler shift, f is a carrier frequency, c is an electromagnetic wave propagation speed, v is a moving speed of the terminal, and θ is an angle between a moving direction of the terminal and a base station signal propagation direction. The carrier frequency f of a cell predefined by the base station can be obtained through the base station, and the propagation speed c of the electromagnetic wave is 3 × 108 m/s.
In the embodiment of the invention, the preset high-speed threshold value is 120 Km/s. If the moving speed of the terminal is judged to be greater than or equal to the preset high-speed threshold value, the terminal is indicated to be a high-speed railway user, and the terminal can be switched to a private network cell. If the moving speed of the terminal is judged to be smaller than the preset high-speed threshold value, the terminal is indicated to be a non-high-speed railway user, and the terminal can be switched to a public network cell. The service cell comprises a private network cell and a public network cell. The private network cell is a cell covering a high-speed railway and provides service for high-speed users. A public network cell is a cell that covers a residential area and serves non-high speed users.
In the embodiment of the invention, the X2 interface is an interconnection interface between base stations and supports direct transmission of data and signaling. The X2 interface signaling is the signaling instructions transmitted between base stations. The X2 interface signaling includes cell access information of the terminal, measurement port signaling, and RRC connection reconfiguration signaling. Specifically, the acquired cell access information of the terminal is shown in table 1 below:
TABLE 1
In the embodiment of the present invention, as shown in table 1 above, the maximum number of last accessed element information records reported in the IE value is 16, which means that the maximum number of information of 16 access cells of each terminal is recorded in the cell access information of the terminal.
Step 205', sending a switching instruction for switching to the public network cell to the terminal, so that the terminal switches to the public network cell according to the switching instruction, and continuing to execute the step of determining whether the moving speed of the terminal is greater than or equal to the preset high speed threshold value.
In the embodiment of the invention, the public network cell is a cell covering a residential area and provides service for non-high-speed users. And sending a switching instruction for switching to the public network cell to the terminal so that the terminal is switched to the public network cell according to the switching instruction, and avoiding that the non-high-speed user stays in the private network cell, occupies high-speed private network resources and interferes with the high-speed user.
In the embodiment of the present invention, before step 206, a private network cell list in each direction is established, which is specifically shown in tables 2 and 3 below:
TABLE 2
TABLE 3
In the embodiment of the invention, the cell access information comprises road identification information of a private network cell connected with the terminal and direction identification information of the private network cell connected with the terminal. The road identifier is used for identifying the road where the private network cell is located. As shown in fig. 4, by looking up table 2, it can be found that private network cells a1, a2, A3, and a4 all belong to the same road a, and therefore private network cells a1, a2, A3, and a4 have the same road identifier.
And step 207, if the number of the private network cells with the same road identifier is larger than or equal to the preset threshold value, determining the extending direction of the road identified by the same road identifier according to the direction identifier information of the private network cells with the same road identifier connected to the terminal through route judgment.
And step 208, determining the moving direction of the terminal according to the extending direction of the road identified by the same road identification and the direction of the driving route acquired in advance.
In the embodiment of the present invention, the preset threshold is 3. If the number of the private network cells with the same road identifier is larger than or equal to 3, the terminal is indicated to be driven from the road identified by the same road identifier. For example, the cells queried to be accessed in the cell access information of the queried terminal include a1, a2 and A3, and by querying the table 2 above, it can be queried that private network cells a1, a2 and A3 all belong to the same road a and have the same road identifier, thus indicating that the terminal is driven on the road a.
The direction identification is used for identifying the direction of the road where the private network cell is located, and the extending direction of the road can be determined by acquiring the direction identification information of the private network cell connected with the terminal. For example, as shown in fig. 4, private network cells a1, a2, A3, and a4 in the a direction all belong to the same road, and have the same road identifier, and by acquiring the direction identifier information of private network cells a1, a2, A3, and a4, the route decision can determine that the extending direction of the road in the a direction is the a4 to a1 direction. The route judgment specifically comprises the step of determining the extending direction of the road identified by the same road identification according to the direction identification information of the private network cell of the same road identification connected with the terminal. After the route decision, the a4-C direction is determined as the moving direction of the terminal according to the previously acquired travel route direction, for example, the travel route direction is traveling toward C.
And step 209, determining scene information of the terminal according to the position information of the terminal acquired in advance and the line information acquired in advance, wherein the scene information comprises a non-fork scene or a fork scene.
In the embodiment of the invention, the position information of the terminal can be obtained through the measurement report reported by the terminal. The line information is stored in the base station in advance, and scene information of the terminal is determined through position information and line information of the terminal, wherein the position information of the terminal comprises longitude and latitude information and the like of the terminal.
And step 210, if the terminal is judged to be in the scene with the fork according to the scene information, determining that the private network cell in other directions except the moving direction of the terminal is an error cell according to the moving direction of the terminal.
In the embodiment of the invention, if the situation that the terminal is in the turnout-free scene is judged according to the scene information and the situation that the terminal has no error cell interference is shown, the directional switching is carried out by a scheme of carrying out the directional switching in a high-speed environment in the related technology. If the terminal is judged to be in a turnout scene according to the scene information, which indicates that the terminal has the situation of wrong cell interference, if the directional switching is performed through a scheme of performing the directional switching in a high-speed environment in the related technology, the problem that the user can not switch back after switching to the wrong cell is easily caused, so that the private network cell in other directions except the moving direction of the terminal is determined to be the wrong cell according to the moving direction of the terminal, and the user is prevented from switching to the wrong cell by continuously executing subsequent steps.
In the embodiment of the invention, the scene of the fork road comprises a three-fork road scene and a four-fork road scene. When the terminal is in a three-way intersection scene, for example, as shown in fig. 4, when the moving direction of the terminal is a direction a4-C, and the terminal is located in a logical cell formed by private network cells a1, B1, and C1, it can be determined that the private network cell in the direction B is an error cell. When the terminal is in a four-way intersection scene, for example, as shown in fig. 5, when the moving direction of the terminal is X-X ', the terminal is located in private network cells X, X' and Y, Y 'to form a logical cell, it can be determined that the private network cells in the Y direction and the Y' direction are wrong cells.
After step 210, further comprising: and generating a cell filter table according to the moving direction of the terminal and the wrong cell. Specifically, the cell filtering table is shown in table 4 below:
TABLE 4
In the embodiment of the present invention, as shown in table 4 above, when the terminal enters in the Y direction at the four-branch intersection, based on the route information acquired in advance, since the terminal needs to travel straight through the intersection in the high-speed scene at the four-branch intersection, the terminal moves in the Y 'direction, and therefore, the situations that the terminal needs to travel in a turn, such as the entering direction X and the exiting direction Y or Y', are not considered.
Step 211, obtaining a first cell switching request reported by the terminal, where the first cell switching request carries information of a private network cell.
In the embodiment of the invention, the private network cell comprises a switchable cell and an error cell.
In the embodiment of the present invention, before the terminal reports the first cell switching request, the method further includes: the base station sends RRC connection reconfiguration information to the terminal; and the terminal acquires the information of the private network cell according to the RRC connection reconfiguration message.
And step 212, eliminating error cells from the private network cells corresponding to the private network cell information, and determining the remaining private network cells as switchable cells.
In the embodiment of the invention, the error cell is added into the blacklist by starting the blacklist function, so that the error cell can be removed from the private network cell. By eliminating the wrong cell, the problem that the user can not switch back after switching to the wrong cell is avoided.
In the embodiment of the present invention, as shown in fig. 4, when the moving direction of the terminal is the direction a4-C, and the terminal is located in the logical cell formed by the private network cells a1, B1, and C1, it can be determined that the private network cell in the direction B is the wrong cell. By means of pre-acquired private network cells including a1, a2, A3, a4, B1, B2, B3, B4, C1, C2, C3 and C4, after the wrong cells in the B direction are removed, it can be determined that the switchable cells include a1, a2, A3, a4, C1, C2, C3 and C4.
And step 213, sending a directional switching instruction to the terminal, wherein the directional switching instruction carries information of the switchable cell, so that the terminal is switched to the selected switchable cell according to the position information of the terminal and the information of the switchable cell.
In the embodiment of the present invention, as shown in fig. 4, for example, when the current terminal is located in a logical cell formed by private cells a1, B1, and C1, since the moving direction of the terminal is the direction from a4 to C, the terminal obtains its own location information, and since the terminal is going to exit the road in the direction a at this time, the terminal does not select the already connected private cells a1, a2, A3, and a4 for switching, but selects the switchable cell C2 from the information of the switchable cell for switching.
Optionally, after step 210, further comprising:
and step 211', configuring individual offset parameters of the cell for the wrong cell, and sending an RRC connection reconfiguration message to the terminal, so that the terminal generates a second cell switching request according to the RRC connection reconfiguration message.
In the embodiment of the invention, the individual parameters are configured for the wrong cell, so that the second cell switching request is generated according to the RRC connection reconfiguration message, and does not carry the information of the wrong cell, thereby avoiding the terminal from reporting the measurement report of the wrong cell, and reducing the air interface signaling overhead of the terminal.
Step 212', a second cell switching request reported by the terminal is obtained, where the second cell switching request carries information of the private network cell.
Step 213', the switchable cell corresponding to the information of the private network cell is determined as the switchable cell.
Step 214', sending a directional switching instruction to the terminal, where the directional switching instruction carries information of the switchable cell, so that the terminal switches to the selected switchable cell according to the position information of the terminal and the information of the switchable cell. In the technical scheme provided by the embodiment of the invention, the moving speed of the terminal is calculated according to the frequency offset value of the user, after judging that the moving speed of the terminal exceeds a preset high-speed threshold value, determining the moving direction of the terminal by acquiring cell access information of the terminal, and determines an error cell from the preset private network cells according to the moving direction of the terminal and the position information of the terminal acquired in advance, determining switchable cells according to private network cells and error cells, sending directional switching instructions to the terminal, so that the terminal switches to the selected switchable cell according to the location information of the terminal and the information of the switchable cell, therefore, the directional switching of the network can be realized in special networking scenes such as bifurcation or multi-line intersection in high-speed or high-speed rail networking, and the problem that a user can not switch back to a correct cell after switching to a wrong cell is solved.
Fig. 6 is a schematic structural diagram of a directional switching apparatus according to an embodiment of the present invention, as shown in fig. 6, the apparatus includes: a calculation module 11, a judgment module 12, a determination module 13 and a transmission module 14.
The calculating module 11 is configured to calculate a moving speed of the terminal according to the user frequency offset value.
The judging module 12 is configured to judge whether the moving speed of the terminal is greater than or equal to a preset high speed threshold value.
The determining module 13 is configured to trigger the determining module 13 to continue to execute the step of determining the moving direction of the terminal from the cell access information of the terminal if the determining module 12 determines that the moving speed of the terminal is greater than or equal to the preset high-speed threshold; determining an error cell from preset private network cells according to the moving direction of the terminal and position information of the terminal acquired in advance; and determining a switchable cell according to the private network cell and the error cell.
The sending module 14 is configured to send a directional switching instruction to the terminal, where the directional switching instruction carries information of the switchable cell, so that the terminal switches to the selected switchable cell according to the location information of the terminal and the information of the switchable cell.
In the embodiment of the present invention, the computing module 11 of the apparatus specifically includes: an acquisition sub-module 111 and a determination sub-module 132.
The obtaining sub-module 111 is configured to obtain a user frequency offset value periodically reported by the terminal.
The calculating submodule 112 is configured to calculate a doppler shift according to the user frequency offset values of the adjacent periods.
The obtaining sub-module 111 is further configured to obtain a distance between the terminal and the base station and a propagation direction of a base station signal in advance.
The calculation sub-module 112 is further configured to calculate an angle between the moving direction of the terminal and the propagation direction of the base station signal.
The calculation sub-module 112 is further configured to:
and calculating the moving speed v of the terminal, wherein delta f is Doppler frequency shift, f is carrier frequency, c is electromagnetic wave propagation speed, v is the moving speed of the terminal, and theta is an angle between the moving direction of the terminal and the signal propagation direction of the base station.
In the embodiment of the present invention, the apparatus further includes: an acquisition module 15.
The obtaining module 15 is configured to obtain cell access information of the terminal through an X2 interface signaling.
In this embodiment of the present invention, the determining module 13 of the apparatus includes: a query submodule 131 and a determination submodule 132.
The query submodule 131 is configured to query, from the cell access information of the terminal, a road identifier of a private network cell to which the terminal is connected.
The query submodule 131 is further configured to query that the number of private network cells with the same road identifier is greater than or equal to a preset threshold.
The determining submodule 132 is further configured to determine an extending direction of a road identified by the same road identifier according to the direction identifier information of the private network cell of the same road identifier connected to the terminal.
The determining submodule 132 is further configured to determine, according to the extending direction of the road identified by the same road identifier and the pre-acquired driving route direction, that the moving direction of the terminal is the moving direction of the terminal.
In this embodiment of the present invention, the determining module 13 of the apparatus further includes: a decision submodule 133.
The determining submodule 132 is further configured to determine scene information of the terminal according to the pre-acquired position information of the terminal and the pre-acquired route information, where the scene information includes an intersection-free scene or an intersection-involved scene.
The determining submodule 133 is configured to determine whether the terminal is in a fork scene according to the scene information.
The determining submodule 132 is further configured to trigger the determining submodule 132 to continue to execute the step of determining, according to the moving direction of the terminal, that the private network cell in the other direction than the moving direction of the terminal is the wrong cell if the determining submodule 133 determines that the terminal is in the fork scene according to the scene information. In this embodiment of the present invention, the obtaining module 15 of the apparatus is further configured to obtain a first cell switching request reported by the terminal, where the first cell switching request carries information of a private network cell.
In this embodiment of the present invention, the determining module 13 of the apparatus further includes:
the determining sub-module 132 is further configured to remove the error cell from the private network cell corresponding to the information of the private network cell, and determine the remaining private network cells as the switchable cell.
In this embodiment of the present invention, the determining module 13 of the apparatus further includes: a processing sub-module 134 and an acquisition sub-module 135.
The processing sub-module 134 is configured to configure the cell individual offset parameter for the wrong cell, and send an RRC connection reconfiguration message to the terminal, so that the terminal generates a second cell handover request according to the RRC connection reconfiguration message.
The obtaining submodule 135 is further configured to obtain a second cell switching request reported by the terminal, where the second cell switching request carries information of a private network cell.
The determining submodule 132 is further configured to determine a switchable cell corresponding to the information of the private network cell as a switchable cell.
In the technical scheme provided by the embodiment of the invention, the moving speed of the terminal is calculated according to the frequency offset value of the user, after judging that the moving speed of the terminal exceeds a preset high-speed threshold value, determining the moving direction of the terminal by acquiring cell access information of the terminal, and determines an error cell from the preset private network cells according to the moving direction of the terminal and the position information of the terminal acquired in advance, determining switchable cells according to private network cells and error cells, sending directional switching instructions to the terminal, so that the terminal switches to the selected switchable cell according to the location information of the terminal and the information of the switchable cell, therefore, the directional switching of the network can be realized in special networking scenes such as bifurcation or multi-line intersection in high-speed or high-speed rail networking, and the problem that a user can not switch back to a correct cell after switching to a wrong cell is solved.
An embodiment of the present invention provides a storage medium, where the storage medium includes a stored program, where, when the program runs, a device on which the storage medium is located is controlled to execute each step of the above embodiment of the directional switching method, and for specific description, reference may be made to the above embodiment of the directional switching method.
An embodiment of the present invention provides a base station, including a memory and a processor, where the memory is used to store information including program instructions, and the processor is used to control execution of the program instructions, and the program instructions are loaded and executed by the processor to implement the steps of the directional handover method. For a detailed description, reference may be made to the above-described embodiments of the directional handover method.
Fig. 7 is a schematic diagram of a base station according to an embodiment of the present invention. As shown in fig. 7, the base station 3 of this embodiment includes: the processor 21, the memory 22, and the computer program 23 stored in the memory 22 and capable of running on the processor 21, where the computer program 23 is executed by the processor 21 to implement the method applied to the directional switching in the embodiment, and in order to avoid repetition, the details are not repeated herein. Alternatively, the computer program is executed by the processor 21 to implement the functions of the models/units applied in the directional switch device in the embodiments, which are not described herein again to avoid repetition.
The base station 3 includes, but is not limited to, a processor 21, a memory 22. It will be appreciated by those skilled in the art that fig. 7 is merely an example of the base station 3 and does not constitute a limitation of the base station 3 and may include more or less components than shown, or combine certain components, or different components, e.g. the base station 3 may also include input output devices, network access devices, buses, etc.
The Processor 21 may be a Central Processing Unit (CPU), other general purpose Processor, a Digital Signal Processor (DSP), an Application Specific Integrated Circuit (ASIC), a Field Programmable Gate Array (FPGA) or other Programmable logic device, discrete Gate or transistor logic device, discrete hardware component, or the like. A general purpose processor may be a microprocessor or the processor may be any conventional processor or the like.
The memory 22 may be an internal storage unit of the base station 3, such as a hard disk or a memory of the base station 3. The memory 22 may also be an external storage device of the base station 3, such as a plug-in hard disk provided on the base station 3, a Smart Media Card (SMC), a Secure Digital (SD) Card, a Flash memory Card (Flash Card), and the like. Further, the memory 22 may also include both an internal memory unit of the base station 3 and an external memory device. The memory 22 is used for storing computer programs and other programs and data required by the base station 3. The memory 22 may also be used to temporarily store data that has been output or is to be output.
It is clear to those skilled in the art that, for convenience and brevity of description, the specific working processes of the above-described systems, apparatuses and units may refer to the corresponding processes in the foregoing method embodiments, and are not described herein again.
In the embodiments provided in the present invention, it should be understood that the disclosed system, apparatus and method may be implemented in other ways. For example, the above-described apparatus embodiments are merely illustrative, and for example, a division of a unit is merely a logical division, and an actual implementation may have another division, for example, a plurality of units or components may be combined or integrated into another system, or some features may be omitted, or not executed. In addition, the shown or discussed mutual coupling or direct coupling or communication connection may be an indirect coupling or communication connection through some interfaces, devices or units, and may be in an electrical, mechanical or other form.
Units described as separate parts may or may not be physically separate, and parts displayed as units may or may not be physical units, may be located in one place, or may be distributed on a plurality of network units. Some or all of the units can be selected according to actual needs to achieve the purpose of the solution of the embodiment.
In addition, functional units in the embodiments of the present invention may be integrated into one processing unit, or each unit may exist alone physically, or two or more units are integrated into one unit. The integrated unit can be realized in a form of hardware, or in a form of hardware plus a software functional unit.
The integrated unit implemented in the form of a software functional unit may be stored in a computer readable storage medium. The software functional unit is stored in a storage medium and includes several instructions for causing a computer device (which may be a personal computer, a base station, or a network device) or a Processor (Processor) to execute some steps of the methods according to the embodiments of the present invention. And the aforementioned storage medium includes: various media capable of storing program codes, such as a usb disk, a removable hard disk, a Read-Only Memory (ROM), a Random Access Memory (RAM), a magnetic disk, or an optical disk.
The above description is only for the purpose of illustrating the preferred embodiments of the present invention and is not to be construed as limiting the invention, and any modifications, equivalents, improvements and the like made within the spirit and principle of the present invention should be included in the scope of the present invention.
Claims (10)
1. A method of directional handover, the method comprising:
calculating the moving speed of the terminal according to the user frequency offset value;
judging whether the moving speed of the terminal is greater than or equal to a preset high-speed threshold value or not;
if the moving speed of the terminal is judged to be greater than or equal to a preset high-speed threshold value, determining the moving direction of the terminal from cell access information of the terminal;
determining an error cell from preset private network cells according to the moving direction of the terminal and position information of the terminal acquired in advance;
determining a switchable cell according to the private network cell and the error cell;
and sending a directional switching instruction to a terminal, wherein the directional switching instruction carries information of the switchable cell, so that the terminal is switched to the selected switchable cell according to the position information of the terminal and the information of the switchable cell.
2. The method according to claim 1, wherein the calculating the moving speed of the terminal according to the user frequency offset value comprises:
acquiring user frequency offset values periodically reported by the terminal, and calculating Doppler frequency shift according to the user frequency offset values of adjacent periods;
calculating an angle between the moving direction of the terminal and the signal propagation direction of the base station according to the distance between the terminal and the base station and the signal propagation direction of the base station which are obtained in advance;
according to the calculation formula of Doppler frequency shift:
calculating the moving speed v of the terminal, wherein delta f is Doppler frequency shift, f is carrier frequency, c is electromagnetic wave propagation speed, v is the moving speed of the terminal, and theta is the angle between the moving direction of the terminal and the signal propagation direction of the base stationAnd (4) degree.
3. The method of claim 1, wherein before determining the moving direction of the terminal from the cell access information of the terminal, the method comprises:
and acquiring the cell access information of the terminal through X2 interface signaling.
4. The method of claim 1, wherein the cell access information comprises road identification information of a private network cell to which the terminal is connected and direction identification information of the private network cell to which the terminal is connected;
the determining the moving direction of the terminal from the cell access information of the terminal includes:
inquiring the road identification of the private network cell connected with the terminal from the cell access information of the terminal;
if the number of private network cells with the same road identifier is larger than or equal to a preset threshold value, determining the extending direction of the road identified by the same road identifier according to the direction identifier information of the private network cells with the same road identifier connected with the terminal;
and determining the moving direction of the terminal as the moving direction of the terminal according to the extending direction of the road identified by the same road identification and the direction of the driving route acquired in advance.
5. The method of claim 1, wherein the determining a wrong cell from pre-configured private network cells according to the moving direction of the terminal and pre-obtained location information of the terminal comprises:
determining scene information of the terminal according to pre-acquired position information of the terminal and pre-acquired line information, wherein the scene information comprises a turnout-free scene or a turnout scene;
and if the terminal is judged to be in the scene with the fork according to the scene information, determining that the private network cell in other directions except the moving direction of the terminal is an error cell according to the moving direction of the terminal.
6. The method of claim 1, further comprising, prior to said determining a switchable cell based on said private network cell and said faulty cell:
acquiring a first cell switching request reported by the terminal, wherein the first cell switching request carries information of a private network cell;
the determining a switchable cell according to the private network cell and the error cell includes:
and eliminating the error cell from the private network cell corresponding to the information of the private network cell, and determining the remaining private network cells as the switchable cells.
7. The method of claim 1, wherein determining the switchable cell based on the private network cell and the faulty cell comprises:
configuring individual offset parameters of the cells for the wrong cells, and sending RRC connection reconfiguration information to the terminal so that the terminal generates a second cell switching request according to the RRC connection reconfiguration information;
acquiring a second cell switching request reported by the terminal, wherein the second cell switching request carries information of a private network cell;
and determining the switchable cell corresponding to the information of the private network cell as the switchable cell.
8. A directional switching apparatus, characterized in that the apparatus comprises:
the calculation module is used for calculating the moving speed of the terminal according to the user frequency offset value;
the judging module is used for judging whether the moving speed of the terminal is greater than or equal to a preset high-speed threshold value or not;
the determining module is used for determining the moving direction of the terminal from the cell access information of the terminal if the judging module judges that the moving speed of the terminal is greater than or equal to a preset high-speed threshold value; determining an error cell from preset private network cells according to the moving direction of the terminal and position information of the terminal acquired in advance; determining a switchable cell according to the private network cell and the error cell;
and the sending module is used for sending a directional switching instruction to the terminal, wherein the directional switching instruction carries information of the switchable cell, so that the terminal is switched to the selected switchable cell according to the position information of the terminal and the information of the switchable cell.
9. A storage medium, characterized in that the storage medium comprises a stored program, wherein when the program runs, a device in which the storage medium is located is controlled to execute the orientation switching method according to any one of claims 1 to 7.
10. A base station comprising a memory for storing information including program instructions and a processor for controlling the execution of the program instructions, characterized in that the program instructions are loaded and executed by the processor to implement the steps of the directional handover method of any of claims 1 to 7.
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114827905A (en) * | 2022-06-28 | 2022-07-29 | 荣耀终端有限公司 | Communication method and device |
Citations (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101867945A (en) * | 2010-05-31 | 2010-10-20 | 北京交通大学 | High-speed railway mobile network covering method based on distributed antenna and fixed switching channel |
| WO2010121549A1 (en) * | 2009-04-24 | 2010-10-28 | 中兴通讯股份有限公司 | Mobility management method and system for user terminals along fixed lines |
| CN102300274A (en) * | 2011-09-14 | 2011-12-28 | 北京邮电大学 | Geographical-position-information-based fast handover method for time-division duplex long term evolution (TD-LTE) system |
| CN102932864A (en) * | 2011-08-09 | 2013-02-13 | 鼎桥通信技术有限公司 | Method for determining running direction of high-speed train and network-side equipment |
| CN105142194A (en) * | 2015-09-06 | 2015-12-09 | 上海华为技术有限公司 | Cell switching method, base station and system |
| WO2017059713A1 (en) * | 2015-10-09 | 2017-04-13 | 中兴通讯股份有限公司 | Migration method and apparatus |
| CN108024263A (en) * | 2016-11-01 | 2018-05-11 | ***通信集团公司 | One kind simulation drive test method and device |
| CN108462966A (en) * | 2017-02-21 | 2018-08-28 | ***通信集团浙江有限公司 | One kind being based on 2G networks high-speed rail cell RRU positioning identifying methods and system |
| CN109640250A (en) * | 2018-12-04 | 2019-04-16 | 中国联合网络通信集团有限公司 | Orient switching method and device |
-
2019
- 2019-11-29 CN CN201911204849.XA patent/CN112888034B/en active Active
Patent Citations (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2010121549A1 (en) * | 2009-04-24 | 2010-10-28 | 中兴通讯股份有限公司 | Mobility management method and system for user terminals along fixed lines |
| CN101867945A (en) * | 2010-05-31 | 2010-10-20 | 北京交通大学 | High-speed railway mobile network covering method based on distributed antenna and fixed switching channel |
| CN102932864A (en) * | 2011-08-09 | 2013-02-13 | 鼎桥通信技术有限公司 | Method for determining running direction of high-speed train and network-side equipment |
| CN102300274A (en) * | 2011-09-14 | 2011-12-28 | 北京邮电大学 | Geographical-position-information-based fast handover method for time-division duplex long term evolution (TD-LTE) system |
| CN105142194A (en) * | 2015-09-06 | 2015-12-09 | 上海华为技术有限公司 | Cell switching method, base station and system |
| WO2017059713A1 (en) * | 2015-10-09 | 2017-04-13 | 中兴通讯股份有限公司 | Migration method and apparatus |
| CN108024263A (en) * | 2016-11-01 | 2018-05-11 | ***通信集团公司 | One kind simulation drive test method and device |
| CN108462966A (en) * | 2017-02-21 | 2018-08-28 | ***通信集团浙江有限公司 | One kind being based on 2G networks high-speed rail cell RRU positioning identifying methods and system |
| CN109640250A (en) * | 2018-12-04 | 2019-04-16 | 中国联合网络通信集团有限公司 | Orient switching method and device |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114827905A (en) * | 2022-06-28 | 2022-07-29 | 荣耀终端有限公司 | Communication method and device |
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