Mobile terminal Doppler frequency compensation and switching method

Abstract

The invention discloses a mobile terminal Doppler frequency compensation and switching method, which is characterized in that a map with a planned route is pre-stored in a mobile terminal, a plurality of base station cell geographic models along the route and adjacent base station geographic models are pre-formed in the planned route, and when the mobile terminal moves to a specific position in the selected planned route, the mobile terminal is switched to the preset position. According to the method, before the Doppler cell in the base station cell is switched or before the adjacent base station is switched, the receiving Doppler frequency and the transmitting Doppler frequency in the mobile terminal are adjusted according to the corresponding Doppler frequency shift compensation value, and the Doppler frequency compensation is completely completed before the communication quality is influenced.

Description

Technical Field

[0001] The present invention belongs to the technical field of mobile communication, and particularly relates to a method for Doppler frequency compensation and handover of a mobile terminal. Background Art

[0002] During the wireless connection process of mobile communication, when the speed of the mobile terminal reaches a speed that affects the wireless connection in mobile communication, the wireless connection between the mobile terminal and the base station will fail, and the Doppler frequency shift between the mobile terminal and the base station will change from a positive Doppler frequency shift close to the base station to a negative Doppler frequency shift perpendicular to the base station and away from the base station within the base station cell. In the boundary area of ​​two adjacent base station cells, the Doppler frequency shift will change from a negative Doppler frequency shift away from the source base station to a positive Doppler frequency shift value close to the destination base station. According to the prior art method, by judging the moving speed of the mobile terminal and calculating the relative speed of the mobile terminal relative to the base station, when it is determined that the Doppler frequency shift value affects the wireless connection, or by detecting the actual Doppler frequency shift value affecting the wireless connection through the receiving frequency device and the receiving demodulation device in the mobile terminal, or by detecting the transmitting Doppler frequency shift of the mobile terminal through the receiving frequency device and the receiving demodulation device in the base station, correcting the Doppler frequency shift value calculated by the speed and direction affecting the wireless connection, or by presetting the Doppler frequency shift and the number of times in the moving process of the mobile terminal through the speed and time, during the moving process of the mobile terminal, by comparing the detected moving speed and time with the preset speed and time, it is determined that the Doppler frequency shift value affects the wireless connection, when the wireless connection is interrupted, the Doppler positive or negative compensation of the receiving frequency of the mobile terminal is performed to make the mobile terminal in multiple The wireless connection interrupted during the Doppler movement along the line can be reconnected wirelessly. When the Doppler frequency shift value generated by the mobile terminal exceeds the receiving frequency range of the mobile terminal, the mobile terminal has disconnected the wireless connection with the base station. At this time, the wireless connection state between the base station and the mobile terminal is in an uncertain state. Therefore, after the Doppler frequency shift compensation of the mobile terminal, it is possible that the reconnection is the reconstruction or new establishment of the wireless connection of the mobile terminal, rather than the connection state before the Doppler compensation of the mobile terminal. When the base station is uncertain about the connection state of the mobile terminal, the reconnection and access of the mobile terminal will affect the wireless connection after the next Doppler frequency shift compensation at the next Doppler frequency shift position. Finally, the mobile terminal performs Doppler frequency shift compensation while continuously attempting to access or reconnect the wireless connection, resulting in the inability to perform wireless communication connection. At the same time, after the Doppler frequency shift value of the transmitting frequency of the mobile terminal exceeds the error range of the receiving frequency of the base station, it will exceed the subcarrier protection interval within the receiving bandwidth of the base station, thereby affecting the wireless connection signal quality of the adjacent subcarriers. In summary, the current Doppler shift compensation technology mainly involves performing Doppler shift compensation at a certain position during the Doppler movement along the line when the Doppler shift affects the quality of the wireless connection signal and is interrupted, or performing Doppler shift compensation at a certain position during the Doppler movement along the line when the preset Doppler shift value, speed and time affect the quality of the wireless connection signal of the mobile terminal and are interrupted, that is, the Doppler shift of the mobile terminal is compensated after the wireless connection is affected. Summary of the invention

[0003] In view of the problems existing in the above-mentioned background technology, the present invention proposes a method for Doppler frequency compensation and handover of a mobile terminal, which can realize timely Doppler spectrum compensation or handover of the mobile terminal both within the base station cell and between adjacent base stations without affecting normal communication.

[0004] The present invention provides a method for Doppler frequency compensation and handover of a mobile terminal, and the method includes the following steps:

[0005] Pre-store a map with a planned route in the mobile terminal, and a plurality of base station cell geographical models and adjacent base station geographical models are pre-formed along the planned route;

[0006] Pre-generate a combination distribution of Doppler frequency shift handover positions and corresponding Doppler frequency shift compensation value selections along the line in the base station cell geographical model of the planned route of the mobile terminal to form a Doppler cell handover combination distribution of the mobile terminal within the base station cell geographical model, and a mobile terminal cell handover combination distribution of the Doppler different-frequency handover positions and corresponding Doppler frequency shift compensation value selections along the line in the adjacent base station geographical model,

[0007] So as to realize the adjustment of the mobile terminal in the base station cell geographical model along the line through the Doppler cell handover within the base station cell geographical model during the movement of the mobile terminal along the determined route, and realize the base station handover and Doppler frequency compensation of the mobile terminal through the mobile terminal cell handover within the adjacent base station geographical model;

[0008] Among them, in the base station cell geographical model along the line, the mobile terminal determines the moving speed and moving direction of the mobile terminal along the line through the global positioning module, and determines the Doppler frequency shift handover position in the Doppler cell handover combination distribution of the mobile terminal within the base station cell geographical model according to the current connected or idle state of the mobile terminal. Before the Doppler cell handover within the base station cell, the measured value of the wireless connection signal is pre-determined, adjusted or modified to meet the condition of wireless signal connection failure of the mobile terminal, the timer for wireless connection is started, the wireless communication connection is interrupted, and according to the corresponding Doppler frequency shift compensation value of the mobile terminal, the receiving Doppler frequency and the transmitting Doppler frequency in the mobile terminal are adjusted through the frequency adjustment module. After the adjustment is completed, the timer for wireless connection is turned off and the wireless communication connection is restored.

[0009] According to the above technical solution, the moving time of the mobile terminal from the previous Doppler frequency shift handover position to the adjacent next Doppler frequency shift handover position in the base station cell geographical model should be greater than the operation time at the Doppler frequency shift handover position. If it is less, the operation at the next Doppler frequency shift handover position is abandoned;

[0010] When the Doppler frequency shift switching position of the mobile terminal is determined as the position of the end stage of the base station cell of the mobile terminal according to the along-line moving speed, moving direction and operation time required for the Doppler frequency shift switching of the mobile terminal, the starting stage, adjustment stage and ending stage of the Doppler frequency shift switching of each Doppler frequency shift switching position in the base station cell geographical model are formed according to the operation time of the Doppler frequency adjustment and the moving speed and moving direction of the mobile terminal, and the starting stage position of the Doppler frequency shift switching operation is calculated to form different selection combinations of the Doppler frequency shift switching position in the base station cell geographical model and the corresponding starting stage position of the base station cell operation of the mobile terminal;

[0011] When one of the Doppler inter-frequency switching positions in the adjacent base station geographical model is determined as the position of the end stage of the Doppler inter-frequency switching of the adjacent cell of the mobile terminal, the starting stage, adjustment stage and ending stage of the Doppler inter-frequency switching position are formed according to the operation time of the Doppler inter-frequency switching execution stage, the Doppler moving speed along the line and the moving direction of the mobile terminal, and the starting stage position of the Doppler inter-frequency switching operation is calculated to form different selection combinations of the Doppler inter-frequency switching position of the adjacent base station geographical model and the corresponding starting stage position of the Doppler inter-frequency switching operation of the adjacent cell of the mobile terminal.

[0012] According to the above technical solution, a mobile terminal in the border area of ​​two adjacent base station cells, when the current working state is an idle state, selects one of a group of Doppler frequency shift switching positions with a smaller number of Doppler frequency shift switching positions in the geographical model of the source base station cell in the border area of ​​the two adjacent base station cells, which is far away from the Doppler frequency shift switching position, and selects one of a group of Doppler frequency shift switching positions with a smaller number of Doppler frequency shift switching positions in the geographical model of the destination base station cell in the border area of ​​the two adjacent base station cells, which is close to the Doppler frequency shift switching position, and a corresponding pair of mobile terminal Doppler frequency shift compensation values;

[0013] When the current working state is the connected state, select one of a group of Doppler frequency shift switching positions with a large number of Doppler frequency shift switching positions in the geographical model of the source base station cell in the boundary area of ​​the two adjacent base station cells, which is far away from the Doppler frequency shift switching position, and select one of a group of Doppler frequency shift switching positions with a large number of Doppler frequency shift switching positions in the geographical model of the destination base station cell in the boundary area of ​​the two adjacent base station cells, which is close to the Doppler frequency shift switching position, and the corresponding mobile terminal Doppler frequency shift compensation value.

[0014] Continuing with the above technical solution, during the Doppler movement along the line of the mobile terminal, when the geographical locations of multiple base stations on a certain planned route with known geographical locations are unknown, the relative speed of the mobile terminal relative to the destination base station is determined according to two Doppler frequency shift compensation values received at two Doppler frequency shift switching positions in the geographical model of adjacent base stations. The included angle at the two Doppler frequency shift switching positions is determined according to the relationship between the two relative speeds and the moving speed along the line. The geographical location of the base station is determined according to the extension lines forming the two included angles, and the base station cell geographical model of the base station and the geographical model of adjacent base stations are reconstructed, and multiple Doppler frequency shift switching positions along the line and corresponding Doppler frequency shift compensation values are generated accordingly.

[0015] The present invention also provides a mobile terminal with Doppler frequency compensation and switching. A map with a planned route is pre-stored in the mobile terminal. Multiple base station cell geographical models and adjacent base station geographical models along the line are pre-generated in the planned route, and a frequency compensation selection combination with Doppler frequency shift switching positions along the line and corresponding Doppler frequency shift compensation values is included in the models. During the movement of the mobile terminal, according to the planned route, a selection combination distribution of the base station cell geographical model and the adjacent base station geographical model is formed, and a frequency compensation selection combination in the corresponding geographical model is formed.

[0016] A global positioning module, a timer, and a frequency adjustment module are provided in the mobile terminal. When the moving speed and moving direction of the mobile terminal along the line are determined through the global positioning module, and the Doppler frequency shift switching position of the mobile terminal is determined according to the current connected or idle state of the mobile terminal, the timer is started, the wireless communication connection is interrupted, and according to the corresponding compensation frequency value, the received Doppler frequency and the transmitted Doppler frequency in the mobile terminal are adjusted through the frequency adjustment module. After the adjustment is completed, the timer is turned off and the wireless communication connection is restored.

[0017] The present invention also provides an APP for setting the mobile terminal Doppler frequency compensation and switching method of the above technical solution in a mobile terminal, including: displaying the content to be achieved and the content to be operated by the APP through the mobile terminal. The APP controls the receiving frequency adjustment device and the transmitting frequency adjustment device, the Doppler frequency shift compensation and switching timer, and the timer for wireless connection in the mobile terminal through the connection between the operating system and the Radio Resource Control in the mobile terminal, and determines the moving speed, moving direction, and current position of the mobile terminal through the global positioning system.

[0018] The APP in the mobile terminal is provided with map information, and information such as a plurality of base station cells with known geographical locations and receiving frequencies and transmitting frequencies of the base stations selected on a certain planned route with known geographical locations, and information such as the boundary area of ​​adjacent base station cells with known geographical locations, receiving frequencies and transmitting frequencies of the source base station and the destination base station, and a base station cell geographical model or an adjacent base station geographical model established on this basis;

[0019] In the APP, according to the different combinations of the established base station cell geographical models and adjacent base station geographical models during the Doppler movement of the mobile terminal along a planned route, according to the selection combination model of the Doppler frequency shift switching position and the Doppler frequency shift compensation value in the base station cell geographical model during the Doppler movement of the mobile terminal along the line, different selection combinations of the Doppler frequency shift switching position in the base station cell geographical model and the adjacent base station geographical model during the Doppler movement of the mobile terminal along a planned route, the corresponding mobile terminal Doppler frequency shift compensation value and the corresponding starting stage position are combined.

[0020] The beneficial effects of the present invention are as follows: the present invention pre-stores a map with a planned route in a mobile terminal, in which a plurality of base station cell geographical models and adjacent base station geographical models along the route are pre-formed; when the mobile terminal moves to a specific position in the selected planned route, before the Doppler cell switching in the base station cell or before the adjacent base station switching, the receiving Doppler frequency and the transmitting Doppler frequency in the mobile terminal can be adjusted according to the corresponding Doppler frequency shift compensation value, so that the Doppler frequency compensation is completely completed before affecting the communication quality.

[0021] Furthermore, the present invention further forms a Doppler frequency switching start phase, an adjustment phase, and an end phase at the Doppler frequency shift position in the base station cell geographical model or the Doppler frequency switching position in the adjacent base station geographical model, and completes the Doppler frequency shift compensation and switching of the receiving Doppler frequency and the transmitting Doppler frequency of the mobile terminal in these three phases, and can keep the Doppler frequency switching working state of the mobile terminal during the Doppler movement along the line always meeting the requirements of the wireless connection.

[0022] Furthermore, different Doppler frequency shift switching positions and corresponding Doppler frequency shift compensation value combinations are selected in the base station cell geographical model or the adjacent base station geographical model according to the working state of the mobile terminal. If it is in a connected state, a combination with more switching positions is selected; if it is in an idle state, a combination with fewer switching positions is selected, so as to better adapt to different working states and improve communication quality.

[0023] Further, during the Doppler movement along the line of the mobile terminal, if the geographical location of a base station is unknown, the relative speed of the mobile terminal relative to the destination base station can be determined according to the two Doppler frequency shift compensation values received at the two Doppler frequency shift switching positions in the geographical model of adjacent base stations. Further, the included angle at the two Doppler frequency shift switching positions can be determined, and then the geographical location of the base station can be determined according to the extension lines forming the two included angles, and the base station cell geographical model of the base station and the geographical model of adjacent base stations can be reconstructed, and multiple Doppler frequency shift switching positions along the line and corresponding Doppler frequency shift compensation values can be generated accordingly, so as to make up for the Doppler frequency compensation switching data of the unknown base station. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] In order to more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the following will briefly introduce the drawings required for the description of the embodiments or the prior art. Obviously, the following drawings are some embodiments of the present invention. For those of ordinary skill in the art, other drawings can be obtained based on these drawings without creative efforts.

[0025] Figure 1 Flowchart of the Doppler frequency compensation and switching method for the mobile terminal according to the embodiment of the present invention;

[0026] Figure 2 Schematic diagram of the composition of the base station cell geographical model in the mobile terminal according to the embodiment of the present invention;

[0027] Figure 3 Doppler frequency shift switching position diagram in the BS1 base station cell geographical model when the mobile terminal moves along the HBA route at a speed of 350 km / h, with the allowable range of Doppler frequency shift being ±170 Hz, according to the embodiment of the present invention;

[0028] Figure 4 Doppler frequency shift switching position diagram in the BS1 base station cell geographical model when the mobile terminal moves along the HBA route at a speed of 350 km / h, with the allowable range of Doppler frequency shift being ±135 Hz, according to the embodiment of the present invention;

[0029] Figure 5 Doppler frequency shift switching position diagram in the BS1 base station cell geographical model when the mobile terminal moves along the HBA route at a speed of 350 km / h, with the allowable range of Doppler frequency shift being ±100 Hz, according to the embodiment of the present invention;

[0030] Figure 6 Doppler frequency shift switching position diagram in the BS1 base station cell geographical model when the mobile terminal moves along the GAB route;

[0031] Figure 7Doppler frequency shift handover position map in the adjacent base station geographical model from BS1 to BS2 along the GAB route as the mobile terminal moves along the route. Detailed implementation manners

[0032] In order to make the objectives, technical solutions and advantages of the present invention clearer and more understandable, the present invention will be further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain the present invention and are not used to limit the present invention.

[0033] It should be noted that the diagrams provided in the embodiments of the present invention only illustrate the basic concept of the present invention in a schematic manner. Therefore, only the components related to the present invention are shown in the diagrams, rather than being drawn according to the number, shape and size of the components in actual implementation. The types, quantities and proportions of the components in actual implementation can be arbitrarily changed, and the component layout type may also be more complex.

[0034] As Figure 1 shown, the mobile terminal Doppler frequency compensation and handover method according to the embodiment of the present invention mainly includes the following steps:

[0035] S1. Pre-store a map with a planned route in the mobile terminal, and multiple base station cell geographical models and adjacent base station geographical models are pre-formed along the planned route;

[0036] S2. Pre-generate the combination distribution of the Doppler frequency shift handover positions and the corresponding Doppler frequency shift compensation value selections along the planned route in the base station cell geographical model of the mobile terminal to form the Doppler cell handover combination distribution of the mobile terminal in the base station cell geographical model, and the mobile terminal cell handover combination distribution of the Doppler different frequency handover positions and the corresponding Doppler frequency shift compensation value selections along the route in the adjacent base station geographical model;

[0037] S3. During the movement of the mobile terminal along the determined route, the Doppler frequency handover and adjustment of the mobile terminal in the base station cell geographical model along the route are realized through the Doppler cell handover in the base station cell geographical model, and the base station handover and Doppler frequency compensation of the mobile terminal are realized through the mobile terminal cell handover in the adjacent base station geographical model.

[0038] Among them, in the base station cell geographical model along the line, the mobile terminal determines the moving speed and moving direction of the mobile terminal along the line through the global positioning module, and determines the Doppler frequency shift switching position in the Doppler cell switching combination distribution within the base station cell geographical model according to the current connected or idle state of the mobile terminal. By presetting, adjusting or modifying the measured value of the wireless connection signal before Doppler cell switching in the base station cell to meet the condition of wireless signal connection failure of the mobile terminal, the timer for wireless connection is started, the wireless communication connection is interrupted, and according to the Doppler frequency shift compensation value of the corresponding mobile terminal, the receiving Doppler frequency and the transmitting Doppler frequency in the mobile terminal are adjusted through the frequency adjustment module. After the adjustment is completed, the timer for wireless connection is turned off and the wireless communication connection is restored.

[0039] To implement the above method, the present invention also provides a mobile terminal, which is a mobile communication device communicatively connected to a base station in a mobile communication system. The mobile terminal has a global positioning receiving device, a receiving frequency adjustment device and a transmitting frequency adjustment device. A map is set in the mobile terminal, and a base station cell geographical model or an adjacent base station geographical model among multiple base stations along the line is set. A selection combination model of the Doppler frequency shift switching position and the Doppler frequency shift compensation value in the base station cell geographical model during the Doppler movement of the mobile terminal along the line is set. A Doppler frequency adjustment function at the Doppler frequency shift switching position or the Doppler different-frequency switching position in the mobile terminal is set. The base station cell Doppler frequency switching function of the mobile terminal and the adjacent cell Doppler different-frequency switching function of the mobile terminal are set.

[0040] Specifically, the Doppler frequency adjustment and switching function of the mobile terminal is: serially adjusting the receiving frequency adjustment device and the transmitting frequency adjustment device in the mobile terminal in the front-to-back order. If there is only one receiving frequency adjustment device and one transmitting frequency adjustment device in the mobile terminal, the receiving frequency in the receiving frequency adjustment device and the transmitting frequency in the transmitting frequency adjustment device are adjusted individually once; if there are two or more receiving frequency adjustment devices and transmitting frequency adjustment devices in the mobile terminal, the receiving frequency in the currently used receiving frequency adjustment device and the transmitting frequency in the currently used transmitting frequency adjustment device are adjusted individually once.

[0041] Specifically, the Doppler frequency adjustment and switching function of the mobile terminal can also be as follows: adjust the receiving frequency adjustment device and the transmitting frequency adjustment device in the mobile terminal in parallel in sequence, that is, when there are multiple receiving frequency adjustment devices and multiple transmitting frequency adjustment devices in the mobile terminal, it can be adjusted in advance at a Doppler frequency shift position. Among the multiple receiving frequency adjustment devices and multiple transmitting frequency adjustment devices, if there is no available receiving frequency and transmitting frequency at present, then at the next Doppler frequency shift position, switch a receiving frequency adjustment device and a transmitting frequency adjustment device used for the current wireless connection. This adjustment method can be extended to the parallel separate adjustment and switching of three or more receiving frequency adjustment devices and transmitting frequency adjustment devices. This adjustment and switching method reduces the adjustment and switching operation time of the Doppler frequency adjustment and switching function of the mobile terminal at the next Doppler frequency shift position.

[0042] Among them, the base station cell Doppler frequency switching function of the mobile terminal is: during the Doppler movement of the mobile terminal along the line, at the Doppler frequency shift switching position in the current base station cell geographical model and when the working state of the mobile terminal is the connected state, this switching function is a self-defined or adaptive base station cell Doppler frequency switching function in the connected state of the mobile terminal. Among them, in the self-defined base station cell Doppler frequency switching function of the mobile terminal in the connected state, by predetermining the measured value of the wireless connection signal self-definedly selected in the connected state of the mobile terminal as an assumed measured value that meets the wireless connection failure requirements in the connected state of the mobile terminal, the mobile terminal starts a Doppler frequency shift compensation and switching timer newly added in the original communication system. In the adaptive base station cell Doppler frequency switching function of the mobile terminal in the connected state, when the measured value of the wireless connection signal adaptively selected in the connected state of the mobile terminal is adjusted to a corrected measured value that meets the wireless connection failure requirements in the connected state of the mobile terminal, the mobile terminal starts a timer for wireless connection that already exists in the original communication system.

[0043] When the mobile terminal is in the idle state, the handover function is the base station cell Doppler frequency handover function for self-operation in the idle state of the mobile terminal. Specifically, by modifying the measured value of the wireless connection signal selected by the mobile terminal for self-operation in the idle state to a revised measured value that meets the requirements of wireless connection failure in the idle state of the mobile terminal, the mobile terminal enters the self-operation of Doppler frequency shift compensation and handover in the idle state within the base station cell; the mobile terminal interrupts the connection state in the current working state or the wireless communication connection in the idle state; according to the Doppler frequency adjustment and handover function of the mobile terminal, after confirming the adjustment and handover of the receiving frequency in the receiving frequency adjustment device and the transmitting frequency in the transmitting frequency adjustment device of the mobile terminal, for the current connection or idle state during the Doppler movement of the mobile terminal along a certain determined route and the Doppler frequency shift position in the base station cell geographical model corresponding to the current location and the receiving Doppler frequency and transmitting Doppler frequency of the mobile terminal in the base station cell geographical model, the mobile terminal turns off the newly added Doppler frequency shift compensation and handover timer in the original communication system customized in the connection state, or the mobile terminal turns off the timer for wireless connection already available in the original communication system adapted in the connection state, or the mobile terminal turns off the Doppler frequency shift compensation and handover in the idle state within the base station cell in the idle state; the mobile terminal turns on the wireless communication connection with the base station cell and restores the assumed measured value or the revised measured value that meets the requirements of wireless connection failure of the mobile terminal in the connection state as the measured value of the wireless connection signal in the connection state of the mobile terminal, or the mobile terminal turns on the wireless communication connection with the base station cell and restores the revised measured value that meets the requirements of wireless connection failure of the mobile terminal in the idle state as the measured value of the wireless connection signal in the idle state of the mobile terminal; the mobile terminal initiates the wireless communication connection with the base station cell.

[0044] Among them, the adjacent cell Doppler different-frequency handover function of the mobile terminal is: during the Doppler movement along the line of the mobile terminal, at the Doppler different-frequency handover position in the current adjacent base station geographical model and when the working state of the mobile terminal is the connection state, this handover function is the customized or adaptive adjacent cell Doppler different-frequency handover function in the connection state of the mobile terminal.

[0045] Among them, in the custom adjacent cell Doppler inter-frequency handover function of the mobile terminal in the connected state, by custom selecting the along-line target base station in the adjacent cells during the Doppler movement along the line of the mobile terminal as the along-line target base station for the cell handover of the mobile terminal in the connected state of the mobile terminal, and by presetting the measured value of the radio connection signal of the mobile terminal based on the along-line target base station newly added in the connected state of the mobile terminal as the preset measured value that meets the radio connection quality requirements for the cell handover conditions of the adjacent cells in the connected state of the mobile terminal, the mobile terminal reports the preset measured value of the mobile terminal based on the along-line target base station to the source base station and receives the execution instruction and related configuration information for the cell handover of the source base station. In the adaptive adjacent cell Doppler inter-frequency handover function of the mobile terminal in the connected state, by adaptively selecting the along-line target base station in the adjacent cells during the Doppler movement along the line of the mobile terminal as the along-line target base station for the cell handover of the mobile terminal in the connected state of the mobile terminal, and by adjusting the measured value of the radio connection signal of the original mobile terminal based on the along-line target base station adaptively selected in the connected state of the mobile terminal to the adjusted measured value that meets the radio connection quality requirements for the cell handover conditions of the adjacent cells in the connected state of the mobile terminal, the mobile terminal reports the adjusted measured value that meets the radio connection quality requirements for the cell handover conditions of the adjacent cells in the connected state of the mobile terminal based on the along-line target base station to the source base station and receives the execution instruction and related configuration information for the cell handover of the source base station.

[0046] When the mobile terminal is in the idle state, the handover function is the self-operated adjacent cell Doppler different-frequency reselection function in the idle state of the mobile terminal. It selects the destination base station along the line in the adjacent cells during the Doppler movement of the mobile terminal along the line through self-operation in the idle state of the mobile terminal as the destination base station along the line in the cell reselection of the mobile terminal, and modifies the measured value of the radio connection signal of the mobile terminal based on the destination base station along the line selected through self-operation in the idle state of the mobile terminal to the reselection measurement value that meets the radio connection quality requirements for the cell reselection conditions of the adjacent cells in the idle state of the mobile terminal. The mobile terminal performs cell reselection according to the destination base station along the line; the mobile terminal disconnects the connection state in the current working state or the radio communication connection with the source base station in the idle state; according to the Doppler frequency adjustment and handover function of the mobile terminal, after confirming the adjustment and handover of the received Doppler frequency in the receiving frequency adjustment device and the transmitted Doppler frequency in the transmitting frequency adjustment device of the radio connection of the mobile terminal based on the source base station, for the received Doppler frequency and transmitted Doppler frequency of the mobile terminal corresponding to the Doppler different-frequency handover position and the adjacent base station geographical model in the current connection or idle state during the Doppler movement of the mobile terminal along a certain determined route, the mobile terminal activates the radio communication connection with the destination base station along the line, and restores the preset measurement value or adjusted measurement value that meets the radio connection quality requirements for the cell handover conditions of the adjacent cells of the mobile terminal in the connection state to the measured value of the radio connection signal in the connection state of the mobile terminal in the destination base station along the line after the cell handover of the adjacent cells, or the mobile terminal activates the radio communication connection with the destination base station along the line, and restores the reselection measurement value that meets the radio connection quality requirements for the cell reselection conditions of the adjacent cells of the mobile terminal in the idle state to the measured value of the radio connection signal in the idle state of the mobile terminal in the destination base station along the line after the cell reselection of the adjacent cells; the mobile terminal initiates the radio communication connection with the destination base station along the line.

[0047] Embodiment 1

[0048] As Figure 2 shown, on the H high-speed rail with a certain moving speed, terminals A1 - A moving together m form the mobile terminals HA1 - HA m ; on the G high-speed rail with a certain moving speed, terminals B1 - B moving together n form the mobile terminals GB1 - GB n ;

[0049] In this example, terminals A1 - A m and B1 - B n are equipped with a global positioning receiving device, a receiving frequency adjustment device, and a transmitting frequency adjustment device. Terminals A1 - A m and B1 - B nAll are provided with maps having planned routes. In the planned routes, there are set a base station cell geographical model and an adjacent base station geographical model. In the adjacent base station geographical model, there are set different selection combinations constituting the Doppler inter-frequency handover positions and corresponding Doppler frequency shift compensation values during the Doppler movement along the line of the mobile terminal. In the base station cell geographical model, there is set a selection combination model of the Doppler frequency shift handover positions and corresponding Doppler frequency shift compensation values during the Doppler movement along the line of the mobile terminal. In the planned routes, there are also set different selection combinations of the base station cell geographical model and the Doppler frequency shift handover positions in the adjacent base station geographical model, the corresponding Doppler frequency shift compensation values of the mobile terminal, and the corresponding starting stage positions during the Doppler movement of the mobile terminal along a certain determined route. The terminal A1 - A m and B1 - B n are also provided with the Doppler frequency adjustment and handover functions of the mobile terminal, including the base station cell Doppler frequency handover function of the mobile terminal and the adjacent cell Doppler inter-frequency handover function of the mobile terminal.

[0050] In this example, in the 2D and 3D maps set by the mobile terminal, the starting position with known geographical location to the terminal position can be selected. Among them, a certain road route composed of roads, elevated roads, bridges, etc., a certain railway route in the railway network, and a certain bearing route carrying a carrier with a certain moving speed, etc., form a certain planned route.

[0051] In the map set by the mobile terminal HA1 - HA m , the H high-speed rail selects the railway route from the B station with known geographical location to the A station in the railway network to form a planned route, abbreviated as HBA. In the map set by the mobile terminal GB1 - GB n , the G high-speed rail selects the railway route from the A station with known geographical location to the B station in the railway network to form a planned route, abbreviated as GAB.

[0052] In this example, along the HBA planned route with known geographical location on the mobile terminal HA1 - HA m or along the GAB planned route with known geographical location on the mobile terminal GB1 - GB n , since the HBA planned route and the GAB planned route are two parallel and opposite-direction routes, therefore, the geographical location, transmission and reception frequencies, and bandwidths of the same base station are the base stations BS1 - BS n on the GAB planned route and the base stations BS n -BS1 on the selected line of HBA. For the sake of convenience, in the following description, the base stations BS1 and BS2 are selected from the series of base stations BS1 - BS n on the selected line of GAB.

[0053] In this example, based on the known geographical locations of base stations, the transmitting frequencies, and the receiving frequencies of base stations along a certain planned route of a mobile terminal, a corresponding geographical model of the base station cell is established through the geometric relationship between one of the base stations and the mobile path within the base station cell. And an adjacent base station geographical model is established through the junction area of two adjacent base station cells in the junction area between the source base station cell geographical model and the destination base station cell geographical model. Among multiple base station cells on the HBA planned route or the GAB planned route, base stations BS1 and BS2 with known geographical locations are selected. The transmitting center frequency of base station BS1 is 1.85 GHz, the carrier bandwidth is 20 MHz, the receiving center frequency of base station BS1 is 1.755 GHz, the carrier bandwidth is 20 MHz, the transmitting center frequency of base station BS2 is 1.87 GHz, the carrier bandwidth is 20 MHz, the receiving center frequency of base station BS2 is 1.775 GHz, the carrier bandwidth is 20 MHz, and the transmitting frequencies and receiving frequencies of base stations BS1 and BS2 remain unchanged at present. A corresponding geographical model of base station cell BS1 or BS2 is established through the geometric relationship between base station BS1 or BS2 and the mobile path within base station cell BS1 or base station cell BS2. Other BS n The geographical model of the base station cell is established accordingly.

[0054] In this example, the typical geographical model of the base station cell has symmetry or asymmetry. The symmetric typical geographical model of the base station cell means that the distances of the two boundary sides of the coverage range of the base station are close. Among them, the geographical model of base station cell BS1 or BS2 is a symmetric typical geographical model of the base station cell: the coverage range is 5 km, the boundaries are symmetric, and the perpendicular distances from base stations BS1 and BS2 to the HBA line are both 300 meters. The asymmetric typical geographical model of the base station cell means that the distances of the two boundary sides of the coverage range of the base station are not equal. Among them, the special geographical model of the base station cell is the geographical model of the base station cell where the time of the Doppler frequency shift position interval in the geometric relationship between the base station and the mobile path is less than the operation time of the Doppler frequency switching function of the mobile terminal at a certain speed, or the base station with the coverage signal source located at the entrance or exit of the railway tunnel or at one end of the bridge is an eccentric coverage geographical model of the base station cell, etc.

[0055] In this example, an adjacent base station geographical model is established through the base station cell junction area in the junction area between the source base station cell geographical model of the source base station BS1 and the destination base station cell geographical model of the destination base station BS2. Among them, the source base station and the destination base station can be selected as needed. Other adjacent base station geographical models are established accordingly.

[0056] In this example, during the Doppler movement along the line of the mobile terminal, adjacent base station geographical models with common characteristics or adjacent base station geographical models without common characteristics in different adjacent base station cell boundary regions form typical or special adjacent base station geographical models. Among them, for the typical adjacent base station geographical model, the typical source base station geographical model and the typical destination base station geographical model of adjacent cells on a certain planned route are the same in the adjacent junction region of the two base stations; for the special adjacent base station geographical model, there are multiple base station boundary intersection regions for adjacent cells on a certain planned route or the adjacent cells on a certain planned route are tunnel cells, etc.

[0057] In this example, by establishing different combinations of the base station cell geographical model of BS n and the adjacent base station geographical models from BS n to BS n-1 during the Doppler movement along the line of the mobile terminal along the HBA selection, different combinations during the Doppler movement of the mobile terminal along the HBA planned route are established, and different combinations of the base station cell geographical model of BS n and the adjacent base station geographical models from BS n to BS n-1 are established. When the mobile terminal moves along the HBA selection line at a Doppler movement along-line moving speed and along-line moving direction that affect the quality of the wireless connection signal during the movement, it is called the Doppler movement of the mobile terminal along the HBA planned route;

[0058] By establishing different combinations of the base station cell geographical model of BS n and the adjacent base station geographical models from BS n-1 to BS n during the Doppler movement of the mobile terminal along the GBA planned route, different combinations during the Doppler movement of the mobile terminal along the GBA planned route are established, and different combinations of the base station cell geographical model of BS n and the adjacent base station geographical models from BS n-1 to BS n are established. When the mobile terminal moves along the GBA planned route at a Doppler movement along-line moving speed and along-line moving direction that affect the quality of the wireless connection signal during the movement, it is called the Doppler movement of the mobile terminal along the GBA planned route.

[0059] In this example, when the Doppler frequency shift value based on the receiving center frequency of the mobile terminal in the mobile terminal is an increasing value, it is called the positive Doppler frequency shift value of the mobile terminal. When the Doppler frequency shift value based on the receiving center frequency of the mobile terminal in the mobile terminal is a decreasing value, it is called the negative Doppler frequency shift value of the mobile terminal. Among them, in the geometric relationship between one of the base stations and the mobile path in the base station cell during the along-line Doppler movement of the mobile terminal, when the mobile terminal has a positive Doppler frequency shift value in a certain section of the route, it is called the approaching Doppler frequency shift value and approaching Doppler position of the mobile terminal, simply referred to as the mobile terminal approaching. At this time, the Doppler frequency shift compensation value of the mobile terminal is negative; when the mobile terminal is near the receiving center frequency in a certain section of the route, it is called the vertical Doppler frequency shift value and vertical Doppler position of the mobile terminal, simply referred to as the mobile terminal vertical. At this time, the Doppler frequency shift compensation value of the mobile terminal is zero; when the mobile terminal has a negative Doppler frequency shift value in a certain section of the route, it is called the departing Doppler frequency shift value and departing Doppler position of the mobile terminal, simply referred to as the mobile terminal departing. Among them, according to the different combinations of the approaching, vertical, and departing Doppler frequency shift values and Doppler frequency shift positions of the mobile terminal in the base station cell geographical model, the changing rule of the approaching, vertical, and departing positive to negative Doppler frequency shifts of the mobile terminal in the base station cell geographical model is formed, and the changing rule of the negative to positive Doppler shift from the departing source base station to the approaching destination base station of the mobile terminal in the adjacent base station geographical model is formed.

[0060] Among them, the approaching Doppler position of the mobile terminal and the corresponding maximum approaching positive Doppler frequency shift value are approximately the starting point of the approaching Doppler position in the base station cell geographical model and also the approaching Doppler position of the destination base station in the adjacent base station geographical model. The departing Doppler position of the mobile terminal and the corresponding maximum departing negative Doppler frequency shift value are approximately the end point of the departing Doppler position in the base station cell geographical model.

[0061] In this example, according to the selection, different combinations of the base station cell geographical model and the adjacent base station geographical model can be formed. After the combination is determined, in one base station cell geographical model of the combination, the Doppler frequency shift compensation value and handover position in the base station cell geographical model can be selected according to the actual situation to form a selection combination model. In actual situations, the along-line moving speed and along-line moving direction of the mobile terminal will affect the quality of the wireless connection signal, and there are different selection combinations for the moving speed and moving direction, such as uniform speed, acceleration, deceleration, etc. Among them, the Doppler moving speeds that affect the quality of the wireless connection signal in uniform speed are 260 km / h, 300 km / h, 350 km / h, etc., and different moving directions will also have an impact.

[0062] It should be noted that the methods for implementing Doppler frequency compensation and handover of the mobile terminal in the present invention are all within the requirements of the received frequency error range of the mobile terminal that meets the communication system standard and within the received frequency error range of the base station that meets the communication system standard, and under the condition of meeting the requirements of the guard interval between multiple subcarrier frequencies within the received frequency bandwidth of the base station. In the standards of different communication systems, the received frequency error standards of the mobile terminal are different, and the received frequency error standards of the base station are different.

[0063] In this embodiment, during the Doppler movement of the mobile terminal along the line, according to the variation law of the positive to negative Doppler frequency shift of the mobile terminal approaching, perpendicular, and moving away in the geographical model of the base station cell, and according to the variation law of the negative to positive Doppler frequency shift of the mobile terminal moving from the source base station to the destination base station in the geographical model of the adjacent base station, while within the requirements of the received frequency error range of the mobile terminal and the received frequency error range of the base station, and on the premise of meeting the requirements of the guard interval between multiple subcarrier frequencies within the received frequency bandwidth of the base station, select the positive or negative change range of the Doppler frequency shift value of the mobile terminal from one Doppler frequency shift handover position to the next Doppler frequency shift handover position and the corresponding mobile terminal.

[0064] Furthermore, under the condition of being above the minimum requirement of the wireless connection signal quality of the mobile terminal, according to the different service requirements of the mobile terminal, in the positive or negative change range of the Doppler frequency shift value of the mobile terminal from one Doppler frequency shift handover position to the next Doppler frequency shift handover position in the geographical model of the base station cell during the Doppler movement of the mobile terminal along the line, select the positive or negative change range of the Doppler frequency shift value of the mobile terminal that meets the requirement standard of the wireless connection signal quality for the Doppler frequency shift compensation range.

[0065] Specifically, the moving time of the mobile terminal from the previous Doppler frequency shift handover position to the adjacent next Doppler frequency shift handover position in the geographical model of the base station cell should be greater than the operation time at the Doppler frequency shift handover position. If it is less, the operation at the next Doppler frequency shift handover position is abandoned. The Doppler frequency shift handover position of the mobile terminal can be determined as the position at the end stage of the base station cell of the mobile terminal according to the moving speed, moving direction of the mobile terminal along the line, and the operation time required for the Doppler frequency shift handover. According to the operation time of the Doppler frequency adjustment, the moving speed, and the moving direction of the mobile terminal, the start stage, adjustment stage, and end stage of the Doppler frequency shift handover at each Doppler frequency shift handover position in the geographical model of the base station cell are formed, and the start stage position of the Doppler frequency shift handover operation is calculated to constitute different selection combinations of the Doppler frequency shift handover position in the geographical model of the base station cell and the corresponding start stage position of the mobile terminal base station cell operation.

[0066] Further, one of the Doppler off-frequency handover positions in the adjacent base station geographical model can be determined as the position at the end stage of the Doppler off-frequency handover of the adjacent cell of the mobile terminal. Based on the operation time in the Doppler off-frequency handover execution stage, the along-track Doppler moving speed and moving direction of the mobile terminal, the start stage, adjustment stage, and end stage of the Doppler off-frequency handover position are formed, and the position at the start stage of the Doppler off-frequency handover operation is calculated to constitute different selection combinations of the Doppler off-frequency handover position in the adjacent base station geographical model and the position at the start stage of the Doppler off-frequency handover operation of the adjacent cell of the mobile terminal corresponding thereto.

[0067] Among them, according to the service requirements of the mobile terminal, the selection combination of the Doppler frequency shift handover position in the geographical model of the base station cell where the mobile terminal is currently located and the position at the start stage of the Doppler frequency shift handover operation of the mobile terminal base station cell corresponding thereto can be selected according to the current connected or idle state of the mobile terminal. When the current working state of the mobile terminal is the idle state, through the along-track moving speed and moving direction during the Doppler movement of the mobile terminal along a certain determined route, according to the different requirements for the radio connection quality of the service requirements of the base station cell Doppler frequency shift handover function of the self-operation of the mobile terminal in the idle state, a set of Doppler frequency shift handover positions with a smaller number in the geographical model of the base station cell where the mobile terminal is currently located during the Doppler movement of the mobile terminal along a certain determined route is selected, and a corresponding set of Doppler frequency shift compensation values of the mobile terminal and a corresponding set of positions at the start stage of the Doppler frequency shift handover operation of the mobile terminal base station cell; when the current working state of the mobile terminal is the connected state, through the along-track moving speed and the moving direction along a certain determined route during the Doppler movement of the mobile terminal along a certain determined route, according to the different requirements for the radio connection quality of the service requirements of the customized or adaptive base station cell Doppler frequency shift handover function of the mobile terminal in the connected state, a set of Doppler frequency shift handover positions with a larger number in the geographical model of the base station cell where the mobile terminal is currently located during the Doppler movement of the mobile terminal along a certain determined route is selected, and a corresponding set of Doppler frequency shift compensation values of the mobile terminal and a corresponding set of positions at the start stage of the Doppler frequency shift handover operation of the mobile terminal base station cell.

[0068] According to the Doppler frequency shift calculation formula:

[0069] Through the formula for calculating the Doppler frequency shift:

[0070] Where: f dis the Doppler frequency shift value, with the unit of Hz; ν is the moving speed of the mobile terminal, with the unit of m / s; C is the propagation speed of electromagnetic waves, with the unit of m / s; f is the carrier frequency, with the unit of Hz; θ is the angle between the moving direction of the mobile terminal and the signal propagation direction. The above formula does not consider other factors such as the influence of air medium on the transmission speed of radio frequency electromagnetic waves and the multipath effect of radio frequency signal transmission.

[0071] By selecting the positional relationship between the mobile terminal and the base station in the geographical model of the base station cell of the mobile terminal, that is, the angle θ between the moving direction of the mobile terminal and the transmission direction of the radio frequency signal between the mobile terminal and the base station, and according to the moving speed ν of the mobile terminal, the relative moving speed relative to the base station and the Doppler frequency shift value f under different angles θ can be calculated. d . Through the selection and combination of the above different conditions, a selection combination model of the Doppler frequency shift switching position and the Doppler frequency shift compensation value in the geographical model of the BS1 base station cell during the Doppler movement of the mobile terminal along the line is established.

[0072] Embodiment 2

[0073] In this embodiment, on the basis of Embodiment 1, how the Doppler frequency shift switching position of the mobile terminal and the Doppler frequency compensation are set is further introduced.

[0074] In this embodiment, HA1 - HA m In the forward or negative change range of the Doppler frequency shift value of the mobile terminal from the previous Doppler frequency shift switching position to the adjacent next Doppler frequency shift switching position in the geographical model of the BS1 base station cell during the Doppler movement of the mobile terminal along the HBA planned route, HA1 - HA is formed. m The Doppler frequency shift switching position in the geographical model of the BS1 base station cell during the Doppler movement of the mobile terminal along the line, and at the corresponding Doppler frequency shift switching position, based on HA1 - HA in the BS1 base station cell m The received Doppler frequency of the mobile terminal in the geographical model of the BS1 base station cell corresponding to the positive or negative Doppler frequency shift compensation value of the receiving center frequency of the mobile terminal, and at the corresponding Doppler frequency shift switching position, based on the negative or positive Doppler frequency shift compensation value of the transmitting center frequency of the mobile terminal in the geographical model of the BS1 base station cell, the transmitted Doppler frequency of the mobile terminal is formed, constituting HA1 - HA. m Table 1A, Table 2A, and Table 3A of different selection combinations of the Doppler frequency shift switching position and the corresponding Doppler frequency shift compensation value of the mobile terminal in the geographical model of the BS1 base station cell during the Doppler movement of the mobile terminal along the HBA planned route.

[0075] In the base station geographic model, a map with a planned route HBA is pre-stored in the mobile terminal. The process of establishing the base station cell geographic model for each base station cell along the planned route HBA in this map is described in detail below.

[0076] In this embodiment, taking the base station BS1 along the planned route HBA as an example, the method of establishing the base station cell geographic model is described.

[0077] As shown in the appendix Figure 3 As shown, the BS1 base station is a base station along the planned route HBA on the pre-stored map. The longitude and latitude geographic information of the BS1 base station, as well as the distance relationship information between the BS1 base station and the planned route HBA, are stored in the pre-stored map. The vertical distance between the BS1 base station and the planned route HBA is 300 meters, and the coverage radius of the BS1 base station is 2500 meters. That is, the distances between the BS1 base station and the edge handover points A and B covered by two base station cells on the planned route HBA are both 2500 meters. The mobile terminal moves along the planned route HBA from point B within the coverage range of the BS1 base station to point A, and the moving speed is 350 km / h.

[0078] According to the 3GPP communication standard, in the LTE mobile communication system, the allowable frequency error between the base station and the mobile terminal is ±0.01 PPM, that is, the allowable frequency error between the BS1 base station and the mobile terminal needs to be less than ±185 Hz. When the mobile terminal moves inside the base station cell BS1 along the planned route HBA, Doppler frequency shift will occur. When the Doppler frequency shift value exceeds ±185 Hz, it will affect the call quality of the mobile terminal. Therefore, in this embodiment, according to the wireless communication quality requirements of the mobile terminal, the allowable Doppler frequency shift value range of the mobile terminal is selected as ±170 (Hz). The smaller this value is, the higher the corresponding wireless communication quality. According to the Doppler frequency shift formula;

[0079]

[0080] The formula can be deduced as:

[0081] cosθ = C·f d / (f·V) (2)

[0082] When the allowable Doppler frequency shift value f of the mobile terminal is selected d After that, the included angle θ between the moving direction of the mobile terminal and the signal propagation direction between the mobile terminal and the base station can be calculated using formula (2).

[0083] Among them, in the above formula: f dis the Doppler shift value (i.e., the allowable Doppler shift value); V is the moving speed of the mobile terminal, with the unit of m / s; C is the electromagnetic wave propagation speed, with the unit of m / s; f is the carrier frequency, with the unit of Hz; θ is the included angle between the moving direction of the mobile terminal and the signal propagation direction.

[0084] When the mobile terminal just enters point B of the cell of base station BS1, the included angle θ is close to 0°. According to the formula (1), it can be deduced that the Doppler shift value of the mobile terminal at this time is about 595 Hz. At this time, the Doppler shift value is greater than the allowable frequency error value of the base station and the terminal, ±185 Hz. Therefore, a Doppler shift compensation is required. The amount of the frequency shift compensation value can be confirmed according to the allowable range value of the Doppler shift. In this embodiment, the preferred choice for the allowable range value of the Doppler shift is ±170 Hz. Then, the range of the value from the first compensation to the second compensation is 595 Hz - 255 Hz. At this time, the middle value 425 Hz of this range is selected to compensate the Doppler shift value, that is, the receiving frequency of the mobile terminal is adjusted to 1.85 GHz + 425 Hz, and the transmitting frequency of the mobile terminal is adjusted to 1.755 GHz + 425 Hz. Then, the position of the first Doppler shift compensation is at a distance of 37 meters from point B when entering the cell of base station BS1. The Doppler shift value at the compensation point of the second Doppler shift is 255 Hz. According to the above formula (2)

[0085] cosθ = C·f d / (f·V)

[0086] where C is the propagation speed of electromagnetic waves in the air, 30000000 m / s, the Doppler shift value f d is 255 Hz, f is the base station transmission and mobile terminal reception frequency, 1850000000 Hz, V is the moving speed of the mobile terminal, 97.2 m / s. By calculation, cosθ = 0.4254. From this, it can be calculated that the included angle between the moving direction of the mobile terminal at the second Doppler shift compensation position and the signal transmission direction between the base station and the mobile terminal is 64.8°. Refer to the appendix Figure 5 , according to the vertical distance between base station BS1 and the planned route H is 300 meters, it can be calculated that the position of the Doppler shift switching point here is at a distance of 2358 meters from point B. The mobile terminal is close to base station BS1 at this time. The corresponding receiving frequency of the mobile terminal is calibrated to 1.85 GHz + 85 Hz, and the transmitting frequency of the mobile terminal is calibrated to 1.755 GHz + 85 Hz.

[0087] Similarly, the Doppler frequency shift switching positions of the other two mobile terminals away from the BS1 base station in the BS1 base station cell can be obtained, as well as the positions of the Doppler frequency shift switching points of the other two mobile terminals away from the BS1 base station. The distance between the first far point and point B is 2,542 meters. The received frequency of the corresponding mobile terminal is calibrated to 1.85 GHz - 255 Hz, and the transmitted frequency of the mobile terminal is calibrated to 1.755 GHz - 255 Hz. The distance between the second far point and point B is 2,801 meters. The received frequency of the corresponding mobile terminal is calibrated to 1.85 GHz - 510 Hz, and the transmitted frequency of the mobile terminal is calibrated to 1.755 GHz - 510 Hz. The parameters in the corresponding base station cell geographic model are shown in Table 1A.

[0088] Similarly, it can be calculated that when the moving speed of the mobile terminal is 350 km / h and the allowable range of the Doppler frequency shift compensation value of the mobile terminal is selected as other values, such as ±135 Hz and ±100 Hz, the Doppler frequency shift switching positions of the mobile terminal in the BS1 base station cell and the corresponding Doppler frequency shift compensation values are as shown in Table 1A. Figure 4 , Figure 5 The above parameters constitute the key parameters in the geographic model of the BS1 base station cell. The handover of the mobile terminal from one Doppler frequency shift switching position to the next Doppler frequency shift switching position is called Doppler cell handover.

[0089] Table 1A shows the different combinations of the Doppler frequency shift switching positions and Doppler frequency shift compensation values in the geographic model of the BS1 base station cell along the HBA route in the HBA direction, from HA1 to HA m When the mobile terminal moves from point B to point A, within the error range of 185 Hz (±0.01 PPM) of the received frequency of 1.85 GHz of the mobile terminal, different selection combinations of the previous Doppler frequency shift switching position to the adjacent next Doppler frequency shift switching position and the corresponding positive or negative change range of the Doppler frequency shift value of the mobile terminal during the Doppler movement along the line of the mobile terminal are ±170 Hz, ±135 Hz, and ±100 Hz, and the terminal moving speed is 350 km / h. The subcarrier spacing of the mobile terminal is 15K, and the influence of the wireless connection signal quality is 0 - 30 dB. Among them, the geographic model of the BS1 base station cell is a symmetric typical base station cell geographic model: the coverage range is 5 km, the boundary is symmetric, and the vertical distance between the base station BS1 and the HBA line is 300 meters.

[0090] Table 1A Different combinations of Doppler frequency shift switching positions and Doppler frequency shift compensation values in the geographic model of the BS1 base station cell along the HBA

[0091]

[0092]

[0093]

[0094] Table 2A shows the HA1-HA in the HBA planned route in the geographical model of cell BS1 along the HBA direction m The mobile terminal moves from point B to point A. When the mobile terminal receives a frequency of 1.85 GHz, within an error range of 185 Hz (i.e., ±0.1 PPM), different selection combinations are considered for the Doppler shift handover positions from the previous to the adjacent next Doppler shift handover position in the geographical model of cell BS1 during the Doppler shift along the line of the mobile terminal and the corresponding positive or negative change ranges of the Doppler shift values of the mobile terminal, which are ±170 Hz, ±135 Hz, and ±100 Hz respectively, with the terminal moving speed being 250 km / h. The subcarrier spacing of the mobile terminal is 15K, and the impact of the wireless connection signal quality is 0 - 30 dB. Among them, the geographical model of cell BS1 is a symmetric typical cell geographical model: the coverage range is 5 km, the boundaries are symmetric, and the perpendicular distance between base station BS1 and the HBA line is 300 meters.

[0095] Table 2A Different selection combinations of Doppler shift handover positions and Doppler shift compensation values in the geographical model of cell BS1 along the HBA

[0096]

[0097]

[0098] Table 3A shows the HA1-HA in the HBA planned route in the geographical model of cell BS1 along the HBA direction m The mobile terminal moves from point B to point A. When the mobile terminal receives a frequency of 1.85 GHz, within an error range of 185 Hz (i.e., ±0.1 PPM), different selection combinations are considered for the Doppler shift handover positions from the previous to the adjacent next Doppler shift handover position in the geographical model of cell BS1 during the Doppler shift along the line of the mobile terminal and the corresponding positive or negative change ranges of the Doppler shift values of the mobile terminal, which are ±170 Hz, ±135 Hz, and ±100 Hz respectively, with the terminal moving speed being 150 km / h. The subcarrier spacing of the mobile terminal is 15K, and the impact of the wireless connection signal quality is 0 - 30 dB. Among them, the geographical model of cell BS1 is a symmetric typical cell geographical model: the coverage range is 5 km, the boundaries are symmetric, and the perpendicular distance between base station BS1 and the HBA line is 300 meters;

[0099] Table 3A Different selection combinations of Doppler shift handover positions and Doppler shift compensation values in the geographical model of cell BS1 along the HBA

[0100]

[0101]

[0102] Example 3

[0103] This example is based on the above Example 2. In the above Example 2, through the established HA m During the Doppler movement of the mobile terminal along the HBA planned route, the Doppler frequency shift switching positions and Doppler frequency shift compensation values in the geographical model of the BS1 base station cell are selected for the combination model of 1A, 2A, and 3A. The moving time of the mobile terminal from one Doppler frequency shift switching position to the adjacent next Doppler frequency shift switching position in the geographical model of the base station cell should be greater than the operation time at the Doppler frequency shift switching position. If it is less, the operation at the next Doppler frequency shift switching position needs to be abandoned. Therefore, it is necessary to determine in advance the position at the start stage of the switching operation according to the operation time at the Doppler frequency shift switching position, reserve the switching operation time, and the real switching ends when the transmit frequency and receive spectrum of the mobile terminal are adjusted to the corresponding Doppler compensation frequencies after the switching operation is completed. Specifically, when determining the Doppler frequency shift switching position of the mobile terminal as the position at the end stage of the Doppler frequency switching of the base station cell of the mobile terminal according to the moving speed, moving direction of the mobile terminal along the line, and the operation time required for the Doppler frequency shift switching, the start stage, adjustment stage, and end stage of the Doppler frequency shift switching at each Doppler frequency shift switching position in the geographical model of the base station cell are formed according to the operation time of the Doppler frequency adjustment, the moving speed, and the moving direction of the mobile terminal, and the position at the start stage of the Doppler frequency shift switching operation is calculated to form different selection combinations of the Doppler frequency shift switching positions in the geographical model of the base station cell and the corresponding positions at the start stage of the Doppler frequency switching operation of the base station cell of the mobile terminal. Similarly, when determining one of the Doppler different-frequency switching positions in the adjacent base station geographical model as the position at the end stage of the Doppler different-frequency switching of the adjacent cell of the mobile terminal, the start stage, adjustment stage, and end stage of the Doppler different-frequency switching are formed according to the operation time in the Doppler different-frequency switching execution stage, the Doppler moving speed and moving direction of the mobile terminal along the line, and the position at the start stage of the Doppler different-frequency switching operation is calculated to form different selection combinations of the Doppler different-frequency switching positions in the adjacent base station geographical model and the corresponding positions at the start stage of the Doppler different-frequency switching operation of the adjacent cell of the mobile terminal.

[0104] In this embodiment, when determining one of the Doppler shift handover positions in the formed geographical model of the BS1 base station cell as the position at the end stage of the Doppler frequency handover of the mobile terminal's base station cell, the starting position of the Doppler frequency handover operation of the mobile terminal's base station cell is determined according to the operation time of the Doppler frequency adjustment and handover function of the mobile terminal corresponding to the Doppler frequency handover adjustment stage of the mobile terminal's base station cell, the Doppler moving speed and moving direction of the mobile terminal along the line. Among them, at the Doppler shift position in the geographical model of the BS1 base station cell during the Doppler movement of the mobile terminal along the line, the relationship among the start stage, adjustment stage, and end stage of the Doppler frequency handover of the mobile terminal's base station cell in the Doppler frequency handover function of the mobile terminal is formed.

[0105] According to the Doppler shift positions in the geographical model of the BS1 base station in Table 1A, Table 2A, and Table 3A, and according to the operation time of the Doppler frequency adjustment and handover function of the mobile terminal corresponding to the Doppler frequency handover adjustment stage of the mobile terminal's basic cell, that is, the operation time required for the APP to connect to the RRC control through the mobile phone operating system to adjust the receiving and transmitting frequency adjustment operations of the mobile terminal, select the adjustment time to be 20mS - 40mS, and determine the position of the start stage of the Doppler frequency handover operation of the terminal's base station cell. The Doppler shift position marked in the geographical model of the BS1 base station cell during the Doppler movement of the mobile terminal along the HBA planned route forms different selection combinations of the Doppler shift handover positions in Table 1A, Table 2A, and Table 3A and the positions of the start stage of the Doppler frequency handover operation of the mobile terminal's base station cell corresponding to Table 1A-1, Table 2A-1, and Table 3A-1 in the geographical model of the BS1 base station cell during the Doppler shift process of the mobile terminal along the line.

[0106] According to the relationship among the start stage, adjustment stage, and end stage of the Doppler frequency handover of the mobile terminal's base station cell, different selection combinations of the Doppler shift handover positions in Table 1A and the positions of the start stage of the Doppler frequency handover operation of the mobile terminal's base station cell corresponding to Table 1A-1 in the geographical model of the BS1 base station cell during the Doppler shift process of the mobile terminal along the line are formed.

[0107] When meeting the interruption time requirement of the mobile terminal in the communication system to maintain the connection state in the geographical model of this BS1 base station cell, select the operation time of the Doppler frequency adjustment and handover function of the mobile terminal corresponding to the Doppler frequency handover adjustment stage of the mobile terminal to be 20mS, 30mS, 40mS, where the moving speed of the mobile terminal is 350 km / h.

[0108] Table 1A - Positions of the mobile terminal corresponding to the Doppler frequency shift positions in the geographical model of the BS1 base station cell along the HBA direction at the start stage of the Doppler frequency switching operation of the base station cell

[0109]

[0110]

[0111] Table 2A - 1 shows different selection combinations of the Doppler frequency shift switching positions in Table 2A and the positions of the mobile terminal corresponding to the start stage of the Doppler frequency switching operation of the base station cell in the geographical model of the BS1 base station cell during the Doppler frequency shift process of the mobile terminal along the line, based on the relationship between the start stage, adjustment stage, and end stage of the Doppler frequency switching of the base station cell of the mobile terminal

[0112] When meeting the interruption time requirement of the mobile terminal in this geographical model of the BS1 base station cell to maintain the connection state in the communication system, the operation times of the Doppler frequency adjustment and switching functions of the mobile terminal corresponding to the adjustment stage of the Doppler frequency shift switching of the base station cell of the mobile terminal are selected as 20 mS, 30 mS, and 40 mS, where the moving speed of the mobile terminal is 350 km / h

[0113] Table 2A - 1 - Positions of the mobile terminal corresponding to the Doppler frequency shift positions in the geographical model of the BS1 base station cell along the HBA direction at the start stage of the Doppler frequency switching operation of the base station cell

[0114]

[0115]

[0116] Table 3A - 1 shows different selection combinations of the Doppler frequency shift switching positions in Table 3A and the positions of the mobile terminal corresponding to the start stage of the Doppler frequency shift switching operation of the base station cell in the geographical model of the BS1 base station cell during the Doppler frequency shift process of the mobile terminal along the line, based on the relationship between the start stage, adjustment stage, and end stage of the Doppler frequency switching of the base station cell of the mobile terminal

[0117] When meeting the interruption time requirement of the mobile terminal in this geographical model of the BS1 base station cell to maintain the connection state in the communication system, the operation times of the Doppler frequency adjustment and switching functions of the mobile terminal corresponding to the adjustment stage of the Doppler frequency shift switching of the base station cell of the mobile terminal are selected as 20 mS, 30 mS, and 40 mS, where the moving speed of the mobile terminal is 350 km / h;

[0118] Table 3A - The position of the mobile terminal at the start stage of the Doppler frequency handover operation corresponding to the Doppler frequency shift position in the geographical model of the BS1 base station cell along the HBA direction

[0119]

[0120] Embodiment 4

[0121] This embodiment is based on Embodiments 2 and 3. In Embodiments 2 and 3, through the established HA m When the previous Doppler frequency shift handover position in the geographical model of the BS1 base station cell during the Doppler movement of the mobile terminal along the HBA planned route is determined as the position at the end stage of the Doppler frequency handover of the base station cell of the mobile terminal, according to the operation time of the Doppler frequency adjustment and handover function of the mobile terminal corresponding to the adjustment stage of the Doppler frequency handover of the base station cell of the mobile terminal, the Doppler movement speed and direction of the mobile terminal along the line, the position at the start stage of the Doppler frequency handover operation of the base station cell of the mobile terminal is determined. Among them, at the Doppler frequency shift position in the geographical model of the BS1 base station cell during the Doppler movement of the mobile terminal along the line, the relationship between the start stage, adjustment stage, and end stage of the Doppler frequency handover of the base station cell of the mobile terminal in the Doppler frequency handover function of the base station cell of the mobile terminal is formed.

[0122] According to the Doppler frequency shift position in the geographical model of the BS1 base station in Tables 1A, 2A, and 3A, and according to the operation time of the Doppler frequency adjustment and handover function of the mobile terminal corresponding to the adjustment stage of the basic cell Doppler frequency handover of the mobile terminal, that is, the operation time required for the APP to connect to the RRC control through the mobile phone operating system to adjust the receiving and transmitting frequencies of the mobile terminal, select the adjustment time to be 20mS - 40mS, determine the position at the start stage of the Doppler frequency handover operation of the base station cell of the terminal. The Doppler frequency shift position marked in the geographical model of the BS1 base station cell during the Doppler movement of the mobile terminal along the HBA planned route constitutes different selection combinations of the Doppler frequency shift handover positions in Tables 1A, 2A, and 3A and the positions at the start stage of the Doppler frequency shift handover operation of the base station cell of the mobile terminal corresponding to Tables 1A - 1, 2A - 1, and 3A - 1 in the geographical model of the BS1 base station cell during the Doppler frequency shift process of the mobile terminal along the line.

[0123] Among them, due to GB1 - GB n The geographical model of the BS1 base station cell during the Doppler movement of the mobile terminal along the GAB planned route and HA1 - HAm During the Doppler frequency shift process along the selected HBA planned route, the geographical model of the BS1 base station cell is the same symmetric adjacent BS1 base station cell geographical model, thus forming HA1-HA m Table 1A, Table 2A, and Table 3A of different selection combinations of the Doppler frequency shift switching positions and the corresponding mobile terminal Doppler frequency shift compensation values in the geographical model of the BS1 base station cell during the Doppler movement of the mobile terminal along the HBA planned route, and forming GB1-GB n The different selection combinations of the Doppler frequency shift switching positions and the corresponding mobile terminal Doppler frequency shift compensation values in the geographical model of the BS1 base station cell during the Doppler movement of the mobile terminal along the GAB planned route are the same as those of GB1-GB, except that GB1-GB n The mobile terminal and HA1-HA m The starting point of the mobile terminal is different and the moving direction is opposite.

[0124] Form GB n The different selection combinations of the Doppler frequency shift switching positions and the corresponding mobile terminal Doppler frequency shift compensation values in the geographical model of the BS1 base station cell during the Doppler movement of the mobile terminal along the GAB planned route.

[0125] The mobile terminals GB1-GB moving in the direction along the high-speed rail line GAB n Moving from Station A to Station B, passing through GB n The relationship between the start stage, adjustment stage, and end stage of the Doppler frequency switching of the BS1 base station cell of the mobile terminal forms GB1-GB n The different selection combinations of the Doppler different-frequency switching positions of the geographical model of the BS1 base station cell during the Doppler movement of the mobile terminal along the line and the positions of the start stage of the Doppler different-frequency switching operation of the adjacent cell of the mobile terminal.

[0126] According to the relationship between the start stage, adjustment stage, and end stage of the Doppler frequency switching of the base station cell of the mobile terminal, form GB n The different selection combinations of the Doppler frequency shift switching positions in the geographical model of the BS1 base station cell during the Doppler frequency shift process of the mobile terminal along the GAB planned route and the positions of the start stage of the Doppler frequency switching operation of the base station cell of the mobile terminal.

[0127] Among them, because GB1-GB n The geographical model of the BS1 base station cell during the Doppler movement of the mobile terminal along the GAB planned route and HA1-HA mThe geographical model of the BS1 base station cell during the Doppler frequency shift along the selected HBA planning route is the same symmetric adjacent BS1 base station cell geographical model. However, the frequencies of BS2 and BS1 base stations are different, thus forming GB1-GB n Table 4B, Table 5B, and Table 6B of different selection combinations of the Doppler frequency shift switching positions and the corresponding mobile terminal Doppler frequency shift compensation values in the geographical model of the BS2 base station cell during the Doppler movement of the mobile terminal along the GAB planning route.

[0128] Table 4B shows that in the geographical model of the BS2 base station cell along the GAB direction in the GAB planning route, GB1-GB n The mobile terminal moves from point A to point B. When the mobile terminal receives a frequency of 1.87 GHz with an error range of 187 Hz (i.e., ±0.1 PPM), different selection combinations of the previous Doppler frequency shift switching position to the adjacent next Doppler frequency shift switching position and the corresponding positive or negative change ranges of the Doppler frequency shift values of the mobile terminal during the Doppler movement along the line of the mobile terminal are ±170 Hz, ±135 Hz, and ±100 Hz respectively, and the terminal moving speed is 350 km / h. The subcarrier spacing of the mobile terminal is 15K, and the influence of the wireless connection signal quality is 0 - 30 dB. Among them, the geographical model of the BS1 base station cell is a symmetric typical base station cell geographical model: the coverage range is 5 km, the boundary is symmetric, and the perpendicular distance between the base station BS1 and the GAB line is 300 meters.

[0129] Table 4B Different selection combinations of the Doppler frequency shift switching positions and Doppler frequency shift compensation values in the geographical model of the BS2 base station cell along the GAB

[0130]

[0131]

[0132]

[0133] Table 5B shows that in the geographical model of the BS2 base station cell along the GAB direction in the GAB planning route, GB1-GB nThe mobile terminal moves from point A to point B. During the mobile terminal's Doppler shift along the line during the selective mobile terminal's Doppler shift movement along the line within an error range of 187 Hz (±0.1 PPM) for the received frequency of 1.87 GHz, the previous Doppler shift handover position to the adjacent next Doppler shift handover position in the base station cell geographical model and the positive or negative change ranges of the corresponding Doppler shift values of the mobile terminal are ±170 Hz, ±135 Hz, and ±100 Hz respectively, with different selection combinations for the terminal moving speed of 250 km / h. Among them, the subcarrier spacing of the mobile terminal is 15K, and the influence of the wireless connection signal quality is 0 - 30 dB; among them, the BS1 base station cell geographical model is a symmetric typical base station cell geographical model: the coverage range is 5 km, the boundaries are symmetric, and the perpendicular distances from the base station BS1 to the GAB line are all 300 meters.

[0134] Table 5B Different selection combinations of Doppler shift handover positions and Doppler shift compensation values in the BS2 base station cell geographical model along GAB

[0135]

[0136]

[0137] Table 6B shows the GB1 - GB in the GAB planned route in the BS2 base station cell geographical model along the GAB direction n The mobile terminal moves from point A to point B. During the mobile terminal's Doppler shift along the line during the selective mobile terminal's Doppler shift movement along the line within an error range of 187 Hz (±0.1 PPM) for the received frequency of 1.87 GHz, the previous Doppler shift handover position to the adjacent next Doppler shift handover position in the base station cell geographical model and the positive or negative change ranges of the corresponding Doppler shift values of the mobile terminal are ±170 Hz, ±135 Hz, and ±100 Hz respectively, with different selection combinations for the terminal moving speed of 350 km / h. Among them, the subcarrier spacing of the mobile terminal is 15K, and the influence of the wireless connection signal quality is 0 - 30 dB; among them, the BS1 base station cell geographical model is a symmetric typical base station cell geographical model: the coverage range is 5 km, the boundaries are symmetric, and the perpendicular distances from the base station BS1 to the GAB line are all 300 meters.

[0138] Table 6B Different selection combinations of Doppler shift handover positions and Doppler shift compensation values in the BS2 base station cell geographical model along GAB

[0139]

[0140]

[0141] According to the relationships among the start stage, adjustment stage, and end stage of the Doppler frequency handover of the base station cell of the mobile terminal, different selection combinations are formed for the Doppler frequency handover positions in Table 4B, Table 5B, and Table 6B in the geographical model of the BS2 base station cell during the Doppler frequency shift process along the line of the mobile terminal and the positions corresponding to the start stage of the Doppler frequency handover operation of the base station cell of the mobile terminal in Table 4B-1, Table 5B-1, and Table 6B-1.

[0142] According to the relationships among the start stage, adjustment stage, and end stage of the Doppler frequency handover of the base station cell of the mobile terminal, different selection combinations are formed for the Doppler frequency handover positions in Table 4B and the positions corresponding to the start stage of the Doppler frequency handover operation of the base station cell of the mobile terminal in Table 4B-1 in the geographical model of the BS2 base station cell during the Doppler frequency shift process along the line of the mobile terminal.

[0143] When meeting the interruption time requirement for the mobile terminal to maintain the connection state in the communication system in this geographical model of the BS2 base station cell, the operation time of the Doppler frequency adjustment and handover function corresponding to the adjustment stage of the Doppler frequency handover of the base station cell of the mobile terminal is selected from 20 mS, 30 mS, and 40 mS, where the moving speed of the mobile terminal is 350 km / h.

[0144] Table 4B-1 Selection Combinations of the Doppler Frequency Shift Positions in the Geographical Model of the BS2 Base Station Cell along the GAB Direction and the Positions Corresponding to the Start Stage of the Doppler Frequency Handover Operation of the Base Station Cell of the Mobile Terminal

[0145]

[0146]

[0147] According to the relationships among the start stage, adjustment stage, and end stage of the Doppler frequency handover of the base station cell of the mobile terminal, different selection combinations are formed for the Doppler frequency handover positions in Table 5B and the positions corresponding to the start stage of the Doppler frequency handover operation of the base station cell of the mobile terminal in Table 5B-1 in the geographical model of the BS2 base station cell during the Doppler frequency shift process along the line of the mobile terminal.

[0148] When meeting the interruption time requirement for the mobile terminal to maintain the connection state in the communication system in this geographical model of the BS2 base station cell, the operation time of the Doppler frequency adjustment and handover function corresponding to the adjustment stage of the Doppler frequency handover of the base station cell of the mobile terminal is selected from 20 mS, 30 mS, and 40 mS, where the moving speed of the mobile terminal is 250 km / h.

[0149] Table 5B-1 Selection Combinations of Doppler Frequency Shift Positions in the Geographical Model of BS2 Base Station Cell along the GAB Direction and the Corresponding Starting Positions of Doppler Frequency Switching Operations of Mobile Terminal Base Station Cells

[0150]

[0151]

[0152] According to the relationships among the starting stage, adjustment stage, and ending stage of the Doppler frequency switching of the base station cell of the mobile terminal, different selection combinations are formed for the Doppler frequency shift switching positions in Table 6B and the corresponding starting positions of the Doppler frequency operation switching of the mobile terminal base station cell in Table 6B-1 in the geographical model of BS2 base station cell during the Doppler frequency shift process of the mobile terminal along the line.

[0153] When meeting the interruption time requirement for the mobile terminal to maintain the connection state in the communication system in the geographical model of this BS2 base station cell, the operation time of the Doppler frequency adjustment and switching function of the mobile terminal corresponding to the adjustment stage of the Doppler frequency switching of the base station cell of the mobile terminal is selected from 20 mS, 30 mS, and 40 mS, where the moving speed of the mobile terminal is 150 km / h.

[0154] Table 6B-1 Selection Combinations of Doppler Frequency Shift Positions in the Geographical Model of BS2 Base Station Cell along the GAB Direction and the Corresponding Starting Positions of Doppler Frequency Switching Operations of Mobile Terminal Base Station Cells

[0155]

[0156]

[0157] Embodiment 5

[0158] In this embodiment, GB1-GB n The mobile terminal moves along the determined route GAB. According to the selection combination models of the Doppler frequency shift switching positions and Doppler frequency shift compensation values in Table 1B, Table 2B, and Table 3B in the geographical models of BS1 and BS2 base station cells during the Doppler movement and the selection combination models of the Doppler frequency shift switching positions and Doppler frequency shift compensation values in Table 4B, Table 5B, and Table 6B in the geographical model of BS2 base station cell, when one of the Doppler different-frequency switching positions in the geographical model of BS1 base station cell is determined as the position of the ending stage of the Doppler different-frequency switching of the adjacent cell of the mobile terminal, in accordance with GB1-GB n The mobile terminal forms GB1-GB according to the operation time of the Doppler frequency adjustment and switching function of the mobile terminal corresponding to the execution stage of the Doppler different-frequency switching between adjacent cells of BS1 to BS2, the Doppler movement speed of the mobile terminal along the line, and the moving direction nOne of the Doppler different-frequency handover positions in the geographical model of the adjacent cells of the mobile terminal from BS1 to BS2 is determined as the position at the start stage of the Doppler different-frequency handover of the adjacent cells of the mobile terminal from BS1 to BS2, and GB1-GB is formed according to the combination of the above positions. n The selection combination model of the Doppler frequency shift handover position and the Doppler frequency shift compensation value for the Doppler different-frequency handover of the mobile terminal along the adjacent cells of BS1 to BS2. The selection combination model of the Doppler frequency shift compensation value is shown in Table 7, Table 8, and Table 9 below, which respectively describe GB1-GB. n The different selection combination models of the mobile terminal moving speeds of 350 km / h, 250 km / h, and 150 km / h.

[0159] Among them, through GB n In the geographical model of the target BS2 cell of the mobile terminal in the boundary area between two adjacent base stations during the Doppler movement along the GAB planned route, near the Doppler frequency shift handover position and the corresponding GB n The different selection combinations of Table 4B, Table 5B, and Table 6B of the Doppler frequency shift compensation value of the mobile terminal form GB n The Doppler different-frequency handover position of BS2, the target base station, in the geographical model of the adjacent base stations of BS1 to BS2 during the Doppler movement of the mobile terminal along the GAB planned route, and the GB in the geographical model of the adjacent base stations of BS1 to BS2 corresponding to the positive or negative Doppler frequency shift compensation value based on the receiving center frequency of the mobile terminal at the corresponding Doppler different-frequency handover position. n The received Doppler frequency of the mobile terminal, and the GB in the geographical model of the adjacent base stations of BS1 to BS2 corresponding to the negative or positive Doppler frequency shift compensation value based on GB in the target BS2 cell at the corresponding Doppler different-frequency handover position. n The transmitted Doppler frequency of the mobile terminal corresponding to the negative or positive Doppler frequency shift compensation value based on the transmitted center frequency of the mobile terminal in the geographical model of the adjacent base stations of BS1 to BS2 forms GB n The different selection combinations of the Doppler frequency shift handover position and the corresponding Doppler frequency shift compensation value tables 7, 8, and 9 of the mobile terminal in the geographical model of the base station cell of BS2 during the Doppler movement of the mobile terminal along the GAB planned route.

[0160] According to the Doppler frequency shift close position GABBS2M1(151m) in the BS2 base station cell model in Table 4B

[0161] The different selection combinations of the Doppler frequency shift handover position and the Doppler frequency shift compensation value of the mobile terminal moving from BS1 to BS2 in the GAB planned route in the geographical model of the adjacent cells of BS1 to BS2 along the GAB line direction form GB nDuring the Doppler movement of the mobile terminal along the GAB planned route, different selection combinations of the Doppler inter-frequency handover positions in the adjacent base station geographical model from base station cell BS1 to base station cell BS2 and the corresponding Doppler frequency shift compensation values of the mobile terminal in Table 7.

[0162] Table 7 Mobile terminal GB n Doppler inter-frequency handover positions in the adjacent base station geographical model from BS1 to BS2 and the corresponding Doppler frequency shift compensation values of the mobile terminal

[0163]

[0164]

[0165] According to the Doppler frequency shift approaching position GABBS2M1(151m) in the BS2 base station cell model in Table 5B

[0166] Different selection combinations of the Doppler frequency shift handover positions and Doppler frequency shift compensation values when the mobile terminal moves from BS1 to BS2 in the GAB planned route in the BS1 to BS2 adjacent cell geographical model along the GAB direction constitute GB n During the Doppler movement of the mobile terminal along the GAB planned route, different selection combinations of the Doppler inter-frequency handover positions in the adjacent base station geographical model from BS1 to BS2 and the corresponding Doppler frequency shift compensation values of the mobile terminal in Table 8.

[0167] Table 8 Mobile terminal GB n Doppler inter-frequency handover positions in the adjacent base station geographical model from BS1 to BS2 and the corresponding Doppler frequency shift compensation values of the mobile terminal

[0168]

[0169]

[0170] According to the Doppler frequency shift approaching position GABBS2M1(151m) in the BS2 base station cell model in Table 6B

[0171] Different selection combinations of the Doppler inter-frequency handover positions and Doppler frequency shift compensation values when the mobile terminal moves from BS1 to BS2 in the GAB planned route in the BS1 to BS2 adjacent cell geographical model along the GAB direction constitute GB n During the Doppler movement of the mobile terminal along the GAB planned route, different selection combinations of the Doppler inter-frequency shift handover positions in the adjacent base station geographical model from BS1 to BS2 and the corresponding Doppler frequency shift compensation values of the mobile terminal in Table 9.

[0172] Table 9 Mobile terminal GB nDoppler different-frequency handover positions in the geographical model of adjacent base stations from BS1 to BS2 and corresponding Doppler frequency shift compensation values of the mobile terminal

[0173]

[0174]

[0175] According to the relationships among the start phase, execution phase, and end phase of Doppler different-frequency handover in the geographical model of adjacent base stations of the mobile terminal, GB is constructed n Table 7-1, Table 8-1, and Table 9-1 of different selection combinations of the positions corresponding to the start phase of Doppler frequency shift handover at the Doppler frequency shift handover positions in the geographical model of adjacent base stations BS1 to BS2 during the Doppler movement of the mobile terminal along the GAB planned route

[0176] According to the constructed GB n Table 7, Table 8, and Table 9 of different selection combinations of the Doppler different-frequency handover positions and corresponding Doppler frequency shift compensation values of the mobile terminal in the geographical model of adjacent base station cells BS1 to BS2 during the Doppler movement of the mobile terminal along the GAB planned route

[0177] The combined relationship among the current connection or idle state of the mobile terminal, the Doppler different-frequency handover positions in the current geographical model of adjacent base stations, the corresponding Doppler frequency shift compensation values of the mobile terminal, and the positions corresponding to the start phase of the Doppler different-frequency handover operation of the adjacent cells of the mobile terminal. When meeting the interruption time requirement for the mobile terminal to maintain the connected state in the communication system in the geographical model of this BS1 base station cell, and choosing the operation time of the Doppler frequency adjustment and handover function of the mobile terminal corresponding to the Doppler frequency handover adjustment phase of the mobile terminal to be selected from 20 mS, 30 mS, and 40 mS, GB is constructed n Table 7 of different selection combinations of the Doppler different-frequency shift handover positions and corresponding Doppler frequency shift compensation values of the mobile terminal in the geographical model of adjacent base stations BS1 to BS2 during the Doppler movement of the mobile terminal along the GAB planned route constitutes GB n Table 7-1 of different selection combinations of the positions corresponding to the start phase of the Doppler different-frequency handover at the Doppler different-frequency handover positions in the geographical model of adjacent base stations BS1 to BS2 during the Doppler movement of the mobile terminal along the GAB planned route

[0178] Table 7-1 constitutes GB n Different selection combinations of the positions corresponding to the start phase of the different-frequency handover operation at the Doppler different-frequency shift handover positions in the geographical model of adjacent base stations BS1 to BS2 during the Doppler movement of the mobile terminal along the GAB planned route

[0179]

[0180] According to the composition of GB n During the Doppler movement of the mobile terminal along the GAB planned route, different selection combinations of the Doppler frequency shift switching positions and the corresponding Doppler frequency shift compensation values of the mobile terminal in the base station cell geographical model of BS2 in Tables 7, 8, and 9.

[0181] The combined relationship between the current connected or idle state of the mobile terminal and the Doppler different-frequency switching positions and the corresponding Doppler frequency shift compensation values of the mobile terminal and the starting stage positions of the corresponding Doppler different-frequency switching operations of the adjacent cells of the mobile terminal in the current adjacent base station geographical model. When meeting the interruption time requirement for the mobile terminal to maintain the connected state in the communication system in the geographical model of this BS1 base station cell, and selecting the operation time of the Doppler frequency adjustment and switching function corresponding to the Doppler frequency switching adjustment stage of the mobile terminal to be 20 mS, 30 mS, or 40 mS, the composition of GB n During the Doppler movement of the mobile terminal along the GAB planned route, different selection combinations of the Doppler frequency shift switching positions and the corresponding Doppler frequency shift compensation values of the mobile terminal in Table 8 of the base station cell geographical model of BS2, which constitute GB n Different selection combinations of the starting stage positions corresponding to the Doppler frequency shift switching positions in the geographical models of the adjacent base stations BS1 to BS2 during the Doppler movement of the mobile terminal along the GAB planned route in Table 8-1.

[0182] Table 8-1 constitutes GB n Different selection combinations of the starting stage positions of the Doppler different-frequency switching operations corresponding to the Doppler different-frequency shift switching positions in the geographical models of the adjacent base stations BS1 to BS2 during the Doppler movement of the mobile terminal along the GAB planned route;

[0183]

[0184] According to the composition of GB n During the Doppler movement of the mobile terminal along the GAB planned route, different selection combinations of the Doppler different-frequency switching positions and the corresponding Doppler frequency shift compensation values of the mobile terminal in the geographical models of the adjacent base stations BS1 to BS2 in Tables 7, 8, and 9.

[0185] The combined relationship among the current connection or idle state of the mobile terminal, the Doppler different-frequency handover positions in the current adjacent base station geographical model, the corresponding Doppler frequency shift compensation values of the mobile terminal, and the positions at the start stage of the Doppler different-frequency handover operation for the adjacent cells of the mobile terminal. When meeting the requirement of the interruption time for the mobile terminal to maintain the connected state in the communication system in the geographical model of this BS1 base station cell, and selecting the operation time of the Doppler frequency adjustment and handover function of the mobile terminal corresponding to the Doppler frequency handover adjustment stage of the mobile terminal from 20 mS, 30 mS, and 40 mS, it constitutes GB n Different selection combinations of the Doppler different-frequency handover positions in the geographical model of the base station cells from BS1 to BS2 and the corresponding Doppler frequency shift compensation values of the mobile terminal in the Doppler movement of the mobile terminal along the GAB planned route, which constitute GB n Different selection combinations of the start stage positions corresponding to the Doppler frequency shift handover positions in the geographical model of the adjacent base stations from BS1 to BS2 during the Doppler movement of the mobile terminal along the GAB planned route in Table 9-1

[0186] Table 9-1 constitutes GB n Different selection combinations of the Doppler different-frequency handover positions and the corresponding positions at the start stage of the Doppler different-frequency handover operation in the geographical model of the adjacent base stations from BS1 to BS2 during the Doppler movement of the mobile terminal along the GAB planned route

[0187]

[0188]

[0189] On the HBA planned route, the mobile terminal is based on the composition of HA1 - HA m Different selection combinations of the Doppler frequency shift handover positions in the geographical model of the BS1 base station cell and the corresponding Doppler frequency shift compensation values of the mobile terminal in the Doppler movement of the mobile terminal along the HBA planned route in Table 1A, Table 2A, and Table 3A, and different selection combinations of the positions at the start stage of the Doppler frequency shift handover operation of the mobile terminal base station cell corresponding to the Doppler frequency shift handover positions in Table 1A, Table 2A, and Table 3A and in Table 1A-1, Table 2A-1, and Table 3A-1 in the geographical model of the BS1 base station cell during the Doppler frequency shift process of the mobile terminal along the line; and so on to constitute the Doppler frequency shift handover positions in the geographical model of the base station cells of the mobile terminal along the HBA planned route n Different selection combinations of the Doppler frequency shift handover positions in the geographical model of the base station cell and the corresponding Doppler frequency shift compensation values of the mobile terminal, which constitute the Doppler frequency shift process of the mobile terminal along the line in the base station cell nDifferent selection combinations of the Doppler frequency shift switching positions in the base station cell geographical model and the starting stage positions corresponding to the Doppler frequency shift switching operations of the mobile terminal in the base station cells.

[0190] According to the composition of GB n During the Doppler movement of the mobile terminal along the GAB planned route, different selection combinations of the Doppler frequency shift switching positions in the base station cell geographical model of BS2 and the corresponding Doppler frequency shift compensation values of the mobile terminal in Tables 7, 8, and 9; the composition of GB n During the Doppler movement of the mobile terminal along the GAB planned route, different selection combinations of the starting stage positions corresponding to the Doppler frequency shift switching positions in the geographical models of the adjacent base stations BS1 to BS2 in Tables 7-1, 8-1, and 9-1, and so on to form GB n During the Doppler movement of the mobile terminal along the GAB planned route, BS n Different selection combinations of the Doppler frequency shift switching positions in the base station cell geographical model and the corresponding Doppler frequency shift compensation values of the mobile terminal; and the composition of GB n During the Doppler movement of the mobile terminal along the GAB planned route, BS n-1 To BS n Different selection combinations of the Doppler different frequency switching positions and the corresponding starting stage positions in the geographical models of the adjacent base stations.

[0191] The combinations form different selection combinations of the Doppler frequency shift switching positions, the corresponding Doppler frequency shift compensation values of the mobile terminal, and the corresponding starting stage positions in the base station cell BS n in the geographical model during the Doppler movement of the mobile terminal along the HBA determined route.

[0192] In the mobile terminal, the mobile terminal forms different combinations of the base station cell BS n and BS n To BS n-1 in the geographical models of the adjacent base stations according to the established Doppler movement of the mobile terminal along the HBA planned route. In the mobile terminal, different selection combinations of the Doppler frequency shift switching positions and the corresponding Doppler frequency shift compensation values of the mobile terminal are formed during the Doppler movement of the mobile terminal along the HBA planned route; different selection combinations of the starting stage positions corresponding to the Doppler frequency shift switching positions in the geographical models of the base station cell BS n and BS n To BS n-1 in the geographical models of the adjacent base stations are formed; different selection combinations of the starting stage positions corresponding to the Doppler frequency shift switching positions in the geographical models of the base station cell BS n and BS n To BS n-1 in the geographical models of the adjacent base stations are formed.

[0193] On the GAB planned route, the mobile terminal forms GB according to the composition of GB n During the Doppler movement of the mobile terminal along the GAB planned route, different selection combinations of the Doppler frequency shift switching positions and the corresponding mobile terminal Doppler frequency shift compensation values in the geographical model of the BS2 base station cell in Table 4B, Table 5B, and Table 6B form different selection combinations of the Doppler frequency shift switching positions in the geographical model of the BS2 base station cell in Table 4B, Table 5B, and Table 6B and the positions at the start stage of the Doppler frequency shift switching operation of the mobile terminal base station cell corresponding to those in Table 4B-1, Table 5B-1, and Table 6B-1 during the Doppler frequency shift process of the mobile terminal along the line; form GB n During the Doppler movement of the mobile terminal along the GAB planned route, different selection combinations of the Doppler frequency shift switching positions and the corresponding mobile terminal Doppler frequency shift compensation values in Table 7, Table 8, and Table 9 of the geographical model of the BS2 base station cell; form GB n During the Doppler movement of the mobile terminal along the GAB planned route, different selection combinations of the start stage positions corresponding to the Doppler frequency shift switching positions in the geographical models of the adjacent base stations BS1 to BS2 in Table 7-1, Table 8-1, and Table 9-1.

[0194] And so on, forming GB n During the Doppler movement of the mobile terminal along the GAB planned route, BS n Different selection combinations of the Doppler frequency shift switching positions and the corresponding mobile terminal Doppler frequency shift compensation values in the geographical model of the base station cell; form GB n During the Doppler movement of the mobile terminal along the GAB planned route, BS n-1 To BS n Different selection combinations of the detection positions corresponding to the Doppler frequency shift switching positions in the geographical models of the adjacent base stations.

[0195] In the mobile terminal, according to the different combinations of the base station cell of the BS during the Doppler movement of the mobile terminal along the selected HBA route that has been established and the geographical models of the adjacent base stations BS n To BS n To BS n-1 Different selection combinations of the Doppler frequency shift switching positions and the corresponding mobile terminal Doppler frequency shift compensation values in the geographical models of the adjacent base stations form different selection combinations of the Doppler frequency shift switching positions and the corresponding mobile terminal Doppler frequency shift compensation values in the base station cell of the BS and the geographical models of the adjacent base stations BS n To BS n To BS n-1 During the Doppler movement of the mobile terminal along the GAB planned route; form the base station cell of the BS and the geographical models of the adjacent base stations BS n To BS n-1 To BS nDifferent selection combinations of the starting stage positions corresponding to the Doppler frequency shift handover positions in the adjacent base station geographical model; the combinations form the base station cell BS during the Doppler movement of the mobile terminal along the determined route of HBA / GAB n and BS n-1 to BS n / BS n to BS n-1 Different selection combinations of the Doppler frequency shift handover positions, the corresponding Doppler frequency shift compensation values of the mobile terminal, and the corresponding starting stage positions in the adjacent base station geographical model.

[0196] The Doppler frequency shift handover, the Doppler frequency shift handover, and the Doppler frequency shift handover form the base station cell. The mobile terminal is based on the established Doppler movement of the mobile terminal along the selected route of GAB during the BS n Base station cell and BS n-1 to BS n Different combinations of the adjacent base station geographical model, during the Doppler movement of the mobile terminal along the planned route of GAB, the BS n Base station cell and BS n-1 to BS n Different selection combinations of the Doppler frequency shift handover positions and the corresponding Doppler frequency shift compensation values of the mobile terminal in the adjacent base station geographical model; form the BS during the Doppler movement of the mobile terminal along the planned route of HBA n Base station cell and BS n to BS n-1 Different selection combinations of the positions at the start stage of the handover operation corresponding to the Doppler frequency shift handover positions in the adjacent base station geographical model; the combinations form the base station cell BS during the Doppler movement of the mobile terminal along the determined route of HBA / GAB n and BS n-1 to BS n / BS n to BS n-1 Different selection combinations of the Doppler frequency shift handover positions, the corresponding Doppler frequency shift compensation values of the mobile terminal, and the corresponding starting stage positions in the adjacent base station geographical model.

[0197] The mobile terminal is based on the established Doppler movement of the mobile terminal along the selected route of HBA during the BS n Base station cell and BS n to BS n-1 Different combinations of the adjacent base station geographical model, during the Doppler movement of the mobile terminal along the planned route of HBA, the BS n Base station cell and BS n to BS n-1Different selection combinations of the Doppler frequency shift switching positions in the adjacent base station geographical model and the corresponding Doppler frequency shift compensation values of the mobile terminal; constitute the BS in the Doppler movement process of the mobile terminal along the GAB planned route n Base station cell and BS n-1 To BS n Different selection combinations of the starting stage positions corresponding to the Doppler frequency shift switching positions in the adjacent base station geographical model; the combination constitutes the base station cell BS in the Doppler movement process of the mobile terminal along the determined route of HBA / GAB n And BS n-1 To BS n / BS n To BS n-1 Different selection combinations of the Doppler frequency shift switching positions in the adjacent base station geographical model, the corresponding Doppler frequency shift compensation values of the mobile terminal, and the corresponding starting stage positions.

[0198] Embodiment 6

[0199] In this embodiment, in the map already set in the HA m mobile terminal, determine the HBA planned route, called the HBA determined route. In the HA m During the Doppler movement of the mobile terminal along the determined line of the HBA, according to the HA already established in the mobile terminal m BS in the Doppler movement process of the mobile terminal along the HBA planned route n Different combinations of the geographical models of the base station cells, according to the selection combination model of the Doppler frequency shift switching positions and the Doppler frequency shift compensation values in the geographical model of the base station cells during the Doppler movement of the mobile terminal along the line set in the mobile terminal, through the mobile terminal that has already constituted the mobile terminal according to the established mobile terminal along the HBA selected route during the Doppler movement of the BS n Base station cell and BS n To BS n-1 Different combinations of the adjacent base station geographical models, in the mobile terminal constitute the BS in the Doppler movement process of the mobile terminal along the HBA planned route n Base station cell and BS n To BS n-1 Different selection combinations of the Doppler frequency shift switching positions in the adjacent base station geographical model and the corresponding Doppler frequency shift compensation values of the mobile terminal; and through the mobile terminal that has already constituted the mobile terminal along the HBA planned route during the Doppler movement of the BS n Base station cell and BS n To BS n-1Different selection combinations of the starting stage positions corresponding to the Doppler frequency shift switching positions in the adjacent base station geographical model; in the mobile terminal, they are combined to form the base station cell BS during the Doppler movement of the mobile terminal along the determined route of HBA / GAB n and BS n-1 to BS n / BS n to BS n-1 Different selection combinations of the Doppler frequency shift switching positions in the adjacent base station geographical model, the corresponding Doppler frequency shift compensation values of the mobile terminal, and the corresponding starting stage positions.

[0200] Preset HA in the mobile terminal m The base station cell BS during the Doppler movement of the mobile terminal along the determined route of HBA n and BS n to BS n-1 Different selection combinations of the Doppler frequency shift switching positions in the adjacent base station geographical model, the corresponding Doppler frequency shift compensation values of the mobile terminal, and the corresponding starting stage positions.

[0201] Embodiment 7

[0202] In this embodiment, HA m The current position in the geographical model of the current BS1 base station cell during the Doppler movement of the mobile terminal along the determined route of HBA. The mobile terminal has preset HA m During the Doppler movement of the mobile terminal along the determined route of HBA, in the geographical model of the current BS1 base station cell, the Doppler frequency shift switching positions and the corresponding Doppler frequency shift compensation value tables 1A, 2A, 3A of the mobile terminal, and different selection combinations of the corresponding starting stage positions, such as in Table 1A-1, Table 2A-1, Table 3A-1. The mobile terminal, through the Doppler frequency shift position detection method of the base station cell geographical model of the mobile terminal, according to the combination relationship between the current connection or idle state of the mobile terminal and the Doppler frequency shift switching position in the current base station cell geographical model, the corresponding Doppler frequency shift compensation value of the mobile terminal, and the position of the starting stage of the Doppler frequency shift switching operation of the mobile terminal base station cell, detects and determines HA m HA during the Doppler movement of the mobile terminal along the determined route of HBA mOne set of Doppler shift positions corresponding to the current connected or idle state of the mobile terminal, the received and transmitted Doppler frequencies of the mobile terminal corresponding to a set of BS1 base station cell geographical models, and the positions at the start stage of the base station cell Doppler shift handover operation of the corresponding set of mobile terminals. Or detecting and determining one Doppler shift position in a set in the current connected or idle state during the Doppler movement of the mobile terminal along the HBA-determined route and the geographical model of the current base station cell, the received and transmitted Doppler frequencies of the mobile terminal corresponding to a pair of base station cell geographical models, and the position at the start stage of the base station cell Doppler shift handover operation of the mobile terminal in a set, which is called the method for detecting the Doppler shift position of the base station cell geographical model of the mobile terminal.

[0203] In this embodiment, according to the combined relationship among the current connected or idle state of the mobile terminal, the Doppler shift handover position in the current BS1 base station cell geographical model, the corresponding Doppler shift compensation value of the mobile terminal, and the position at the start stage of the base station cell Doppler shift handover operation of the mobile terminal:; in the pre-set HA m In the different selection combinations of the Doppler shift handover positions in the BS1 base station cell geographical model during the Doppler movement of the mobile terminal along the HBA-determined route, the corresponding Doppler shift compensation values of the mobile terminal in Tables 1A, 2A, 3A, and the start stage positions in Tables 1A-1, 2A-1, 3A-1, when HA in the BS1 base station cell k+1 to HA m When the current working state of the mobile terminal is the idle state, through HA k+1 to HA m The moving speed of 350 km / h along the line of the current position in the BS1 base station cell geographical model during the Doppler movement of the mobile terminal along the HBA-determined route and the moving direction along the HBA-determined route direction, according to HA k+1 to HA m The lower requirement among the requirements for the radio connection quality of the service demand in the base station cell Doppler frequency handover function of the self-operating mobile terminal in the idle state of the mobile terminal, which is within the standard of 0 - 30 dB, select HA k+1 to HA m A combination of a set of Doppler shift handover positions with a smaller number of Doppler shift handover positions in the current BS1 base station cell geographical model during the Doppler movement of the mobile terminal along the HBA-determined route, and the corresponding set of Doppler shift compensation values of the mobile terminal and the corresponding set of positions at the start stage of the base station cell Doppler shift handover operation of the mobile terminal; when HA1 to HA L or HA L+1 to HA kWhen the current working state of the mobile terminal is the connected state, through HA1 to HA L or HA L+1 to HA k During the Doppler process along the route determined by HBA of the mobile terminal, the moving speed of 350 km / h along the line of the current position and the moving direction along the direction of the route determined by HBA are obtained. According to HA1 to HA L or HA L+1 to HA k The custom or adaptive base station cell Doppler frequency switching function in the connected state of the mobile terminal, where HA1 to HA L The custom of or HA L+1 to HA k Among the requirements of the wireless connection quality for the adaptive service requirements with a higher requirement among the standards of 0 - 30 dB, select HA1 to HA L or HA L+1 to HA k During the Doppler movement of the mobile terminal along the route determined by HBA, select a combination of Doppler frequency shift switching positions with a larger number in the geographical model of the current BS1 base station cell, and a corresponding set of mobile terminal Doppler frequency shift compensation values and a corresponding set of positions at the start stage of the mobile terminal base station cell Doppler frequency shift switching operation.

[0204] In the custom base station cell Doppler frequency switching function of the mobile terminal in the connected state, at the position corresponding to the start stage of the mobile terminal base station cell Doppler frequency switching operation near the HBABS1M2 Doppler frequency shift switching position in one of the sets of Doppler frequency shift positions in the geographical model of the BS1 base station cell on the route determined by HBA detected and determined by the mobile terminal, in the base station cell Doppler frequency switching function of the mobile terminal, through HA1 to HA L When the current working state of the mobile terminal is the connected state, through HA1 to HA L When the measured value of the wireless connection signal custom - selected in the connected state of the mobile terminal is preset as the assumed measured value that meets the wireless connection failure requirement in the connected state of the mobile terminal, HA1 to HA L The mobile terminal starts the Doppler frequency shift compensation and switching timer newly added in the original communication system, HA1 to HA LThe mobile terminal interrupts the wireless communication connection in the current working state. For example: The mobile terminal sends a request to pause the downlink data or voice information to the base station by adding a Doppler frequency shift compensation and handover timer in the original communication system. The base station pauses the service data of the mobile terminal that sends the request to pause the downlink data or voice information. After the mobile terminal confirms that there is no downlink service data from the base station, it starts the Doppler frequency shift compensation and handover timer of the mobile terminal and pauses and disconnects the wireless communication connection with the base station.

[0205] In this embodiment, in the base station cell Doppler frequency handover function of the mobile terminal customized in the connected state of the mobile terminal, in a set of Doppler frequency shift positions in the BS1 base station cell geographical model on the HBA determined route detected by the mobile terminal, at the position corresponding to the vicinity of the HBABS1M2 Doppler frequency shift handover position, in the base station cell Doppler frequency handover adjustment stage of the mobile terminal, according to the Doppler frequency adjustment and handover function of the mobile terminal, after confirming the adjustment and handover of the receiving frequency in the receiving frequency adjustment device and the transmitting frequency in the transmitting frequency adjustment device of the mobile terminal, for the detected HA1 to HA L During the Doppler movement of the mobile terminal along the HBA determined route, in the current BS1 base station cell geographical model corresponding to HA1 to HA L The mobile terminal is currently connected to the working state corresponding to the position near the HBABS1M2 Doppler frequency shift position and the corresponding pair of HA1 to HA of the BS1 base station cell geographical model L After the receiving Doppler frequency and transmitting Doppler frequency of the mobile terminal, HA1 to HA L The mobile terminal turns off the Doppler frequency shift compensation and handover timer newly added in the original communication system, HA1 to HA L The mobile terminal activates the wireless communication connection with the BS1 base station cell and resumes the connection state. Assuming that the measured value that meets the wireless connection failure requirement of the mobile terminal is the measured value of the wireless connection signal in the connected state of the mobile terminal.

[0206] In this embodiment, in the base station cell Doppler frequency handover function of the mobile terminal customized in the connected state of the mobile terminal, at the position corresponding to the end stage of the base station cell Doppler frequency handover of the mobile terminal near the HBABS1M2 Doppler frequency shift handover position in a set of Doppler frequency shift positions in the BS1 base station cell geographical model detected by the mobile terminal, HA1 to HA L The mobile terminal activates the wireless communication connection with the base station cell, at HA1 to HA LDuring the Doppler movement of the mobile terminal along the line, in the three stages of the start stage, adjustment stage, and end stage of the base station cell Doppler frequency handover of the mobile terminal formed at the Doppler frequency shift position near or far from HBABS1M in the geographical model of BS1 base station cell, the handover from HA1 to HA is completed. L Doppler frequency shift compensation and handover of the received Doppler frequency and transmitted Doppler frequency of the mobile terminal are performed to maintain HA1 to HA. L During the Doppler movement of the mobile terminal along the HBA route, the working states of the mobile terminal before the position at the start stage and after the position at the end stage of the base station cell Doppler frequency handover operation of the mobile terminal formed at one of the Doppler frequency shift positions in the current geographical model of BS1 base station cell meet the requirements of the wireless connection and remain unchanged.

[0207] In this embodiment, in the base station cell Doppler frequency handover function of the mobile terminal that is adaptive in the connected state of the mobile terminal, at the position corresponding to the start stage of the base station cell Doppler frequency handover operation of the mobile terminal near the HBABS1M2 Doppler frequency handover position in one set of Doppler frequency shift positions in the geographical model of BS1 base station cell determined by the mobile terminal during detection, in the base station cell Doppler frequency handover function of the mobile terminal at HA L+1 to HA K When the current working state of the mobile terminal is the connected state, through HA L+1 to HA K When the measured value of the adaptive wireless connection signal in the connected state of the mobile terminal is adjusted to a corrected measured value that meets the requirements of the wireless connection failure in the connected state of the mobile terminal, HA L+1 to HA K The mobile terminal starts a timer for wireless connection that already exists in the original communication system, HA L+1 to HA K The mobile terminal interrupts the wireless communication connection in the current working state. For example, by using the wireless connection failure timer T310 for wireless connection that already exists in the original communication system of the mobile terminal, the mobile terminal starts the wireless connection failure T310 timer in the mobile terminal by assuming that the number of times of wireless connection failure received by the mobile terminal meets the requirement of the number of wireless connection failure N310 in the mobile terminal. The mobile terminal is in the waiting duration of the wireless communication connection failure timer, and the mobile terminal pauses and shuts down the wireless communication connection with the base station.

[0208] In this embodiment, in the base station cell Doppler frequency switching function of the mobile terminal that adapts under the connected state of the mobile terminal, in one set of Doppler frequency shift positions in the BS1 base station cell geographical model on the HBA determined route detected by the mobile terminal, in the mobile terminal base station cell Doppler frequency switching adjustment stage corresponding to the HBABS1M2 Doppler frequency shift switching position, according to the Doppler frequency adjustment and switching function of the mobile terminal, when confirming the adjustment and switching of the receiving frequency in the receiving frequency adjustment device and the transmitting frequency in the transmitting frequency adjustment device of the mobile terminal, for the detected HA L+1 to HA K During the Doppler movement of the mobile terminal along the HBA determined route, in the current BS1 base station cell geographical model corresponding to HA L+1 to HA K The HA corresponding to the HBABS1M2 Doppler frequency shift position and the corresponding pair of BS1 base station cell geographical models corresponding to the current connection working state of the mobile terminal L+1 to HA K After the receiving Doppler frequency and the transmitting Doppler frequency of the mobile terminal, HA L+1 to HA K The mobile terminal turns on the wireless communication connection with the base station cell and restores the corrected measurement value that meets the wireless connection failure requirement of the mobile terminal in the connected state as the measurement value of the wireless connection signal in the connected state of the mobile terminal, HA L+1 to HA K The mobile terminal assumes HA L+1 to HA K The number of synchronization signals of the wireless connection received by the mobile terminal meets HA L+1 to HA K When the N311 wireless connection synchronization number requirement in the mobile terminal is met, HA L+1 to HA K The mobile terminal turns off the T310 timer in the mobile terminal.

[0209] In this embodiment, in the base station cell Doppler frequency switching function of the mobile terminal that adapts under the connected state of the mobile terminal, at the position in the mobile terminal base station cell Doppler frequency switching end stage corresponding to one set of Doppler frequency shift positions in the BS1 base station cell geographical model on the HBA determined route detected by the mobile terminal and close to the HBABS1M2 Doppler frequency shift switching position, HA L+1 to HA K The mobile terminal starts the wireless communication connection with the base station cell, in HA L+1 to HA KThe mobile terminal completes HA during the three stages of the start stage, adjustment stage, and end stage of the base station cell Doppler frequency handover of the mobile terminal formed at the Doppler frequency shift position near HBABS1M2 in the BS1 base station cell geographical model during the Doppler movement along the line. L+1 To HA K Doppler frequency shift compensation and handover of the received Doppler frequency and transmitted Doppler frequency of the mobile terminal to maintain HA L+1 To HA K The working states of the mobile terminal before the position at the start stage and after the position at the end stage of the base station cell Doppler frequency handover operation of the mobile terminal formed at a Doppler frequency shift position in the current BS1 base station cell geographical model during the Doppler movement of the mobile terminal along the HBA-determined route meet the requirements of the wireless connection and remain unchanged.

[0210] In this embodiment, in the base station cell Doppler frequency handover function of the mobile terminal that operates automatically in the idle state of the mobile terminal, at the position at the start stage of the base station cell Doppler frequency handover operation of the mobile terminal corresponding to the Doppler frequency shift handover position near HBABS1M2 in one set of Doppler frequency shift positions in the BS1 base station cell geographical model determined by the mobile terminal during detection, at HA K+1 To HA M When the current working state of the mobile terminal is the idle state, through HA K+1 To HA M The measured value of the wireless connection signal selected by the mobile terminal for self-operation in the idle state is modified to a revised measured value that meets the requirements of the wireless connection failure in the idle state of the mobile terminal, HA K+1 To HA M The mobile terminal enters the base station cell Doppler frequency compensation and handover in the idle state, HA K+1 To HA M The mobile terminal interrupts the wireless communication connection in the current working state. For example: According to the characteristics of the mobile terminal in the idle state, the mobile terminal adjusts the measured value of the wireless connection signal quality in the idle state of the mobile terminal to a revised measured value that meets the requirements of the wireless connection failure of the mobile interruption, and then directly operates to turn off and suspend the wireless communication connection with the base station.

[0211] In this embodiment, in the base station cell Doppler frequency switching function of the mobile terminal that operates automatically in the idle state of the mobile terminal, in a group of Doppler frequency shift positions in the BS1 base station cell geographical model on the HBA determination route determined by the mobile terminal, in the mobile terminal base station cell Doppler frequency switching adjustment stage corresponding to the HBABS1M2 Doppler frequency shift switching position, according to the Doppler frequency adjustment and switching function of the mobile terminal, when confirming the adjustment and switching of the receiving frequency in the receiving frequency adjustment device of the mobile terminal and the transmitting frequency in the transmitting frequency adjustment device, for the detected and determined HA K+1 to HA M During the Doppler movement of the mobile terminal along the HBA determination route, in the current BS1 base station cell geographical model corresponding to HA K+1 to HA M After the HBABS1M2 Doppler frequency shift position corresponding to the current idle state of the mobile terminal and the corresponding receiving Doppler frequency and transmitting Doppler frequency of the mobile terminal in a pair of base station cell BS1 geographical models, HA K+1 to HA M The mobile terminal leaves the Doppler frequency shift compensation and switching state in the idle state, HA K+1 to HA M The mobile terminal activates the wireless communication connection with the base station cell BS1 and restores the revised measurement value that meets the wireless connection failure requirement of the mobile terminal in the connected state as the measurement value of the wireless connection signal in the idle state of the mobile terminal.

[0212] In this embodiment, in the base station cell Doppler frequency switching function of the mobile terminal that operates automatically in the idle state of the mobile terminal, at the position of the end stage of the mobile terminal base station cell Doppler frequency switching corresponding to the Doppler frequency shift position near the HBABS1M2 Doppler frequency shift switching position in a group of Doppler frequency shift positions in the BS1 base station cell geographical model on the HBA determination route detected by the mobile terminal, HA K+1 to HA M The mobile terminal starts the wireless communication connection with the BS1 base station cell. In HA K+1 to HA M During the Doppler movement of the mobile terminal along the line, in the three stages of the start stage, adjustment stage, and end stage of the mobile terminal base station cell Doppler frequency switching formed at the HBABS1M2 Doppler frequency shift position in the BS1 base station cell geographical model, HA K+1 to HA M The Doppler frequency shift compensation and switching of the receiving Doppler frequency and transmitting Doppler frequency of the mobile terminal are completed, and HA K+1 to HA MThe working states of the mobile terminal before the position at the start stage and after the position at the end stage of the base station cell Doppler frequency switching operation formed at one of the Doppler shift positions in the current BS1 base station cell geographical model during the Doppler movement along the HBA route remain unchanged and meet the requirements of the wireless connection.

[0213] Embodiment 8

[0214] In this embodiment, in the map already set in the GB n mobile terminal, the GAB planned route is determined, which is called the GAB determined route. In the GB n During the Doppler movement of the mobile terminal along the GAB determined route, according to the GB already established in the mobile terminal n During the Doppler movement of the mobile terminal on the GAB planned route, the BS n base station cell and BS n-1 to BS n different combinations of the geographical models of adjacent base stations, according to the selection combination model of the Doppler shift switching position and the Doppler shift compensation value in the base station cell geographical model during the Doppler movement along the line of the mobile terminal set in the mobile terminal, through the mobile terminal according to the already established mobile terminal along the GAB selected route during the Doppler movement of the BS n base station cell and BS n-1 to BS n different combinations of the geographical models of adjacent base stations, in the mobile terminal constitute the BS during the Doppler movement of the mobile terminal along the GAB planned route n base station cell and BS n-1 to BS n different selection combinations of the Doppler shift switching position and the corresponding mobile terminal Doppler shift compensation value in the geographical models of adjacent base stations; and through the mobile terminal to constitute the BS during the Doppler movement of the mobile terminal along the GAB planned route n base station cell and BS n-1 to BS n different selection combinations of the start stage positions corresponding to the Doppler shift switching positions in the geographical models of adjacent base stations; in the mobile terminal, the combination constitutes the base station cell BS during the Doppler movement of the mobile terminal along the GAB determined route n and BS n-1 to BS n different selection combinations of the Doppler shift switching position, the corresponding mobile terminal Doppler shift compensation value, and the corresponding start stage position in the geographical models of adjacent base stations are the planned routes.

[0215] Preset the GB in the mobile terminal nBase station cell BS during the Doppler movement of the mobile terminal along the route determined by GAB n and BS n-1 to BS n Different selection combinations of the Doppler frequency shift handover positions, the corresponding Doppler frequency shift compensation values of the mobile terminal, and the corresponding detection positions in the geographical model of adjacent base stations

[0216] The current position in the geographical model of adjacent base stations BS1 to BS2 during the Doppler movement of the GBn mobile terminal along the route determined by GAB. Among the different selection combinations of the Doppler different-frequency handover positions, the corresponding Doppler frequency shift compensation values of the mobile terminal, and the corresponding start-phase positions in the geographical model of adjacent base stations BS1 to BS2 during the Doppler movement of the GBn mobile terminal along the route determined by GAB that have been preset, through the Doppler different-frequency handover position detection method of the geographical model of adjacent base stations of the mobile terminal, according to the combination relationship between the current connected or idle state of the GAn mobile terminal and the Doppler different-frequency handover positions, the corresponding Doppler frequency shift compensation values of the mobile terminal, and the positions of the start phase of the Doppler different-frequency handover operation of the adjacent cells of the mobile terminal in the current geographical model of adjacent base stations BS1 to BS2, detect and determine a set of Doppler different-frequency handover positions corresponding to the current connected or idle working state of the mobile terminal and a set of received Doppler frequencies and transmitted Doppler frequencies of the mobile terminal in the geographical model of base station BS2, and the positions of the start phase of the Doppler different-frequency handover operation of a set of adjacent cells of the mobile terminal. Or detect and determine GB n The current connected or idle state during the Doppler movement of the mobile terminal along the route determined by GAB, a Doppler frequency shift position in a set in the geographical model of the current base station cell, the corresponding received Doppler frequency and transmitted Doppler frequency of the mobile terminal in a pair of geographical models of base station cells, and the position of the start phase of the Doppler frequency shift handover operation of the base station cell of a set of the mobile terminal is called the Doppler frequency shift position detection method of the geographical model of the base station cell of the mobile terminal

[0217] In this embodiment, among the different selection combinations of the Doppler different-frequency shift handover positions, the corresponding Doppler frequency shift compensation values of the mobile terminal, and the corresponding start-phase positions in the geographical model of adjacent base stations BS1 to BS2 during the Doppler movement of the GBn mobile terminal along the route determined by GAB, when the GB in the area where the adjacent base station cells of BS1 to BS2 meet k+1 to GB n The current working state of the mobile terminal is the idle state. Through GB k+1 to GB nThe mobile terminal moves at a speed of 350 km / h along the line of its current position in the geographical model of adjacent base station cells from BS1 to BS2 during the Doppler process along the GAB-determined route and moves in the direction of the GAB-determined route. According to GB k+1 to GB n Select GB according to the lower value requirement in the standard of 0 - 30 dB for the wireless connection quality requirement of the custom or adaptive base station cell Doppler frequency switching function service demand in the connected state of the mobile terminal k+1 to GB n During the Doppler movement of the mobile terminal along the GAB-determined route, select one of the Doppler frequency shift switching position combinations with a smaller number of Doppler frequency shift switching positions in the geographical model of the source base station cell in the adjacent base station cell junction area from BS1 to BS2 where the mobile terminal is currently located. This position corresponds to a position at the beginning stage of the Doppler heterogenous frequency switching operation of an adjacent cell of the mobile terminal that is far from the Doppler frequency shift switching position. Select GB k+1 to GB n During the Doppler movement of the mobile terminal along the GAB route, select one of the Doppler frequency shift switching positions with a smaller number of Doppler frequency shift switching positions in the geographical model of the destination base station cell in the adjacent base station cell junction area from BS1 to BS2 where the mobile terminal is currently located. This position is close to the Doppler frequency shift switching position, and the corresponding pair of Doppler frequency shift compensation values for the mobile terminal; when GB1 to GB L or GB L+1 to GB K When the current working state of the mobile terminal is the connected state, through GB1 to GB L or GB L+1 to GB K The mobile terminal moves at a speed of 350 km / h along the line of its current position in the Doppler process along the GAB-determined route and moves in the direction of the GAB-determined route. According to GB1 to GB L or GB L+1 to GB K Select GB1 to GB according to the lower higher standard in the standard of 0 - 30 dB for the wireless connection quality requirement of the service demand of the mobile terminal L or GB L+1 to GB K During the Doppler movement of the mobile terminal along the GAB-determined route, select one of the Doppler frequency shift switching positions with a larger number of Doppler frequency shift switching positions in the geographical model of the source base station cell in the adjacent base station cell junction area from BS1 to BS2 where the mobile terminal is currently located. This position is far from the Doppler frequency shift switching position and the corresponding position at the beginning stage of the Doppler heterogenous frequency switching operation of an adjacent cell of the mobile terminal. Select GB1 to GB L or GB L+1 to GB KOne Doppler frequency shift handover position close to a set of Doppler frequency shift handover positions with a relatively large number of Doppler frequency shift handover positions in the geographical model of the target base station cell in the handover area between adjacent base station cells BS1 and BS2 during the Doppler movement of the mobile terminal along the GAB-determined route, and the Doppler frequency shift compensation value of the mobile terminal corresponding to one Doppler frequency shift handover position close to the geographical model of the target base station cell.

[0218] In this embodiment, according to the relationship among the measurement reporting stage, execution stage, and end stage of the adjacent cell Doppler inter-frequency handover of the mobile terminal formed at one of the Doppler inter-frequency handover positions in the adjacent base station geographical model during the Doppler movement along the line of the mobile terminal, in accordance with the adjacent cell Doppler inter-frequency handover function of the mobile terminal and the Doppler frequency adjustment and handover function of the mobile terminal, in the three stages of the measurement reporting stage, execution stage, and end stage of the adjacent cell Doppler inter-frequency handover of the mobile terminal formed at one of the Doppler inter-frequency handover positions in one of the adjacent base station geographical models during the Doppler movement along the line of the mobile terminal, the cell handover or cell reselection of the mobile terminal from the source base station to the target base station and the Doppler frequency shift compensation of the received Doppler frequency and transmitted Doppler frequency of the mobile terminal are completed, and the working states before and after the cell handover or cell reselection at the position at the start stage and the position at the end stage of the adjacent cell Doppler inter-frequency handover operation of the mobile terminal formed at one of the Doppler inter-frequency handover positions in one of the adjacent base station geographical models during the Doppler movement along the line of the mobile terminal are kept to meet the requirements of the wireless connection without change.

[0219] In this embodiment, in the self-defined adjacent cell Doppler inter-frequency handover function of the mobile terminal in the connected state of the mobile terminal, at the position at the start stage of the adjacent cell Doppler inter-frequency handover operation of the mobile terminal corresponding to the Doppler frequency shift position close to GABBS2M1 in one of the sets of Doppler inter-frequency handover positions in the BS1 to BS2 adjacent base station geographical model on the GAB-determined route detected by the mobile terminal, at GB1-GB L When the current working state of the mobile terminal is the connected state, at GB1-GB L In the self-defined adjacent cell Doppler inter-frequency handover function of the mobile terminal in the connected state of the mobile terminal, through GB1-GB L In the self-defined selection of the mobile terminal in the connected state, the BS2 base station along the line in the BS1 to BS2 adjacent cells during the Doppler movement along the line of the mobile terminal is selected as the target base station along the line in the cell handover of the mobile terminal, and by making GB1-GB LWhen the mobile terminal is in the connected state, the measured value of the wireless connection signal of the mobile terminal based on the destination base station BS2 along the line is preset to a preset measured value that meets the wireless connection quality requirements for the cell handover condition of the adjacent cell in the connected state of the mobile terminal. After the mobile terminal reports the preset measured value of the mobile terminal based on the destination base station BS2 along the line to the source base station BS1 and receives the execution instruction and related configuration information for cell handover from the source base station BS1, for example: through GB1-GB L When the mobile terminal is in the connected state, the base station BS2 along the line in the adjacent cells from BS1 to BS2 during the Doppler movement of the mobile terminal along the line is customarily selected as the destination base station along the line for cell handover of the mobile terminal, and by GB1-GB L When the mobile terminal is in the connected state, the measured value of the wireless connection signal of the mobile terminal based on the destination base station BS2 along the line is preset to a preset measured value that meets the wireless connection quality requirements for the cell handover condition of the adjacent cell in the connected state of the mobile terminal, GB1-GB L After the mobile terminal reports the preset measured value of the mobile terminal based on the destination base station BS2 along the line to the source base station BS1, when the serving cell BS1 source base station determines that it meets the cell handover condition of the adjacent cell during the Doppler movement of the mobile terminal along the line, the serving cell BS1 source base station exchanges information about the cell handover of the relevant adjacent cells with the destination base station BS2 along the line in the cell handover of the adjacent cells during the Doppler movement of the mobile terminal along the line. After the mobile terminal receives the cell handover execution instruction and related configuration information for executing the cell handover of the adjacent cell sent by the source base station BS1 at the cell boundary of the serving cell BS1 source base station, GB1-GB L In the cell handover of the adjacent cells during the Doppler movement of the mobile terminal along the line, information exchange for the cell handover of the relevant adjacent cells is carried out between the destination base station BS2 along the line. After the mobile terminal receives the cell handover execution instruction and related configuration information for executing the cell handover of the adjacent cell sent by the source base station BS1 at the cell boundary of the serving cell BS1 source base station, GB1-GB L The mobile terminal disconnects the wireless connection with the source base station BS1 in the current working state.

[0220] In this embodiment, in the custom adjacent cell Doppler different-frequency handover function of the mobile terminal in the connected state of the mobile terminal, in the execution stage of the adjacent cell Doppler different-frequency handover of the mobile terminal at the Doppler different-frequency handover position close to GABBS2M1 in one of the Doppler different-frequency handover positions in the geographical model of the adjacent base stations from BS1 to BS2 along the GAB determined by the mobile terminal during detection, according to the Doppler frequency adjustment and handover function of the mobile terminal, the received Doppler frequency in the receiving frequency adjustment device for adjusting the wireless connection of the mobile terminal based on the source base station BS1 and the transmitted Doppler frequency in the transmitting frequency adjustment device are confirmed to be GB1-GB for detection and determination. LDuring the Doppler movement of the mobile terminal along the GAB-determined route, the current connection state, the Doppler inter-frequency handover position close to GABBS2M1 in the current BS1 to BS2 adjacent base station geographical model, and the GB1-GB corresponding to the BS1 to BS2 adjacent base station geographical model L After the received Doppler frequency and transmitted Doppler frequency of the mobile terminal, GB1-GB L The mobile terminal initiates a wireless communication connection with the BS2 destination base station along the line, and restores the preset measurement value that meets the wireless connection quality requirements for cell handover conditions of adjacent cells of the mobile terminal in the connected state to the measurement value of the wireless connection signal of the mobile terminal in the BS2 destination base station along the line of adjacent cells.

[0221] In this embodiment, in the custom Doppler inter-frequency handover function of adjacent cells of the mobile terminal in the connected state of the mobile terminal, at the position at the end stage of the Doppler inter-frequency handover of the BS1 to BS2 adjacent cells of the mobile terminal near GABBS2M1 in one set of Doppler inter-frequency handover positions in the BS1 to BS2 adjacent base station geographical model determined by the mobile terminal on the GAB-determined route, GB1-GB L The mobile terminal initiates a wireless communication connection with the BS2 destination base station along the line, at GB1-GB L GB1-GB formed at the Doppler inter-frequency handover position in the current BS1 to BS2 adjacent base station geographical model during the Doppler movement of the mobile terminal along the line L Among the three stages of the Doppler inter-frequency handover measurement reporting stage, execution stage, and end stage of the BS1 to BS2 adjacent cells of the mobile terminal, the GB1-GB from the BS1 source base station to the BS2 destination base station is completed L Cell handover or cell reselection of the mobile terminal and GB1-GB L Doppler frequency shift compensation for the received Doppler frequency and transmitted Doppler frequency of the mobile terminal to maintain GB1-GB L GB1-GB formed at the Doppler inter-frequency handover position in the BS1 to BS2 adjacent base station geographical model during the Doppler movement of the mobile terminal along the GAB-determined route L The working states before and after cell handover or cell reselection at the start position and end position of the Doppler inter-frequency handover operation of the BS1 to BS2 adjacent cells of the mobile terminal meet the requirements of the wireless connection and remain unchanged.

[0222] In this embodiment, in the adaptive adjacent cell Doppler different-frequency handover function of a mobile terminal in a connected state, at the position of the mobile terminal at the start stage of the BS1 to BS2 adjacent cell Doppler different-frequency handover operation at the Doppler different-frequency handover position near GABBS2M1 among one set of Doppler different-frequency handover positions in the BS1 to BS2 adjacent base station geographical model on the GAB determination route determined by the mobile terminal detection, in GB L+1 -GB K When the current working state of the mobile terminal is the connected state, in GB L+1 -GB K In the adaptive BS1 to BS2 adjacent cell Doppler different-frequency handover function of the mobile terminal in the connected state of the mobile terminal, the BS2 destination base station along the line among the adjacent cells during the Doppler movement along the line of the BS1 to BS2 mobile terminal is adaptively selected as the destination base station along the line in the cell handover of the mobile terminal, and by GB L+1 -GB K The wireless connection signal measurement value of the original mobile terminal based on the BS2 destination base station along the line is adjusted to the adjusted measurement value that meets the wireless connection quality requirements for the cell handover conditions of the adjacent cells in the connected state of the mobile terminal, GB L+1 -GB K After the mobile terminal reports the adjusted measurement value that meets the wireless connection quality requirements for the cell handover conditions of the BS1 to BS2 adjacent cells in the connected state of the mobile terminal to the BS1 source base station and receives the execution instruction and relevant configuration information for the cell handover of the BS1 source base station, for example: by GB L+1 -GB K The BS2 destination base station along the line among the adjacent cells during the Doppler movement along the line of the mobile terminal is adaptively selected as the destination base station along the line in the cell handover of the mobile terminal in the connected state of the mobile terminal, and by GB L+1 -GB K The wireless connection signal measurement value of the original mobile terminal based on the BS2 destination base station along the line is adjusted to meet GB L+1 -GB K The adjusted measurement value of the wireless connection quality requirements for the cell handover conditions of the BS1 to BS2 adjacent cells in the connected state of the mobile terminal, GB L+1 -GB K The adjusted measurement value of the wireless connection quality requirements for the cell handover conditions of the BS1 to BS2 adjacent cells in the connected state of the mobile terminal, GB L+1 -GB KAfter the mobile terminal reports the adjusted measurement value of the wireless connection quality that meets the cell handover condition of the BS1 to BS2 adjacent cells in the connection state of the mobile terminal based on the BS2 target base station along the line to the BS1 source base station, the serving cell BS1 source base station determines that it meets GB L+1 -GB K When the serving cell BS1 source base station determines the cell handover condition of the BS1 to BS2 adjacent cells during the Doppler movement of the mobile terminal along the line, the serving cell BS1 source base station exchanges information about the Doppler different-frequency handover of the relevant adjacent cells with GB L+1 -GB K During the Doppler movement of the mobile terminal along the line, information exchange of the Doppler different-frequency handover of the BS1 to BS2 adjacent cells is carried out between the serving cell BS1 source base station and the BS2 target base station along the line in the cell handover of the BS1 to BS2 adjacent cells, GB L+1 -GB K After the mobile terminal receives the cell handover execution instruction of the BS1 to BS2 adjacent cells and the relevant configuration information for performing the cell handover sent by the BS1 source base station at the cell boundary of the serving cell BS1 source base station, the mobile terminal disconnects the wireless communication connection with the BS1 source base station in the current working state;

[0223] In this embodiment, in the adaptive adjacent cell Doppler different-frequency handover function of the mobile terminal in the connected state, during the execution stage of the Doppler different-frequency handover of the BS1 to BS2 adjacent cells of the mobile terminal at the Doppler different-frequency handover position close to GAB BS2M1 in one of the Doppler different-frequency handover positions in the BS1 to BS2 adjacent base station geographical model on the GAB determination route detected by the mobile terminal, according to the Doppler frequency adjustment and handover function of the mobile terminal, after confirming the adjustment and handover of the receiving Doppler frequency and the transmitting Doppler frequency in the receiving frequency adjustment device based on the BS1 source base station of the mobile terminal, for the detected GB L+1 -GB K During the Doppler movement of the mobile terminal along the GAB determination route in the current connection state and the current BS1 to BS2 adjacent base station geographical model at the Doppler different-frequency handover position close to GAB BS2M1 and the GB of the corresponding BS1 to BS2 adjacent base station geographical model L+1 -GB K After the receiving Doppler frequency and the transmitting Doppler frequency of the mobile terminal, GB L+1 -GB K The mobile terminal enables the wireless communication connection with the BS2 target base station along the line and restores the adjusted measurement value of the wireless connection quality that meets the cell handover condition of the BS1 to BS2 adjacent cells in the connected state of the mobile terminal and meets GB L+1 -GB K The adjusted measurement value of the wireless connection quality that meets the cell handover condition of the BS1 to BS2 adjacent cells in the connected state of the mobile terminal is the measurement value of the wireless connection signal of the mobile terminal in the BS2 target base station along the line of the BS1 to BS2 adjacent cells;

[0224] In this embodiment, in the adjacent cell Doppler different frequency handover function of the adaptive mobile terminal in the connected state of the mobile terminal, at the position of the end stage of the adjacent cell Doppler different frequency handover of the mobile terminal at the Doppler different frequency handover position close to GABBS2M1 among one set of Doppler different frequency handover positions in the BS1 to BS2 adjacent base station geographical model on the GAB determination route determined by the mobile terminal, GB L+1 -GB K The mobile terminal initiates a wireless communication connection with the target base station BS2, at GB L+1 -GB K Among the three stages of the adjacent cell Doppler different frequency handover measurement reporting stage, execution stage, and end stage formed at the Doppler different frequency handover position in the current BS1 to BS2 adjacent base station geographical model during the Doppler movement of the mobile terminal along the line, the GB from the source base station BS1 to the target base station BS2 is completed L+1 -GB K Cell handover or cell reselection of the mobile terminal and GB L+1 -GB K Doppler frequency shift compensation of the received Doppler frequency and transmitted Doppler frequency of the mobile terminal, maintaining GB L+1 -GB K GB formed at the Doppler different frequency handover position close to GABBS2M1 in the current BS1 to BS2 adjacent base station geographical model during the Doppler movement of the mobile terminal along the GAB determination route L+1 -GB K The working states before and after cell handover or cell reselection at the position of the start stage and end stage of the BS1 to BS2 adjacent cell Doppler different frequency handover operation of the mobile terminal meet the requirements of the wireless connection and remain unchanged

[0225] In this embodiment, in the adjacent cell Doppler different frequency reselection function of the self-operating mobile terminal in the idle state of the mobile terminal, at the position of the start stage of the adjacent cell Doppler different frequency handover of the mobile terminal at the Doppler different frequency handover position close to GABBS2M1 among one set of Doppler different frequency handover positions in the BS1 to BS2 adjacent base station geographical model determined by the mobile terminal, at GB K+1 -GB N When the current working state of the mobile terminal is the idle state, at GB K+1 -GB N In the adjacent cell Doppler different frequency reselection function of the self-operating mobile terminal in the idle state of the mobile terminal, through GB K+1 -GB NWhen the mobile terminal is in the idle state, the self-operation selects the along-line BS2 target base station in the adjacent cells of BS1 to BS2 during the Doppler movement of the mobile terminal along the line as the along-line target base station for cell reselection of the mobile terminal, and by GB K+1 -GB N When the mobile terminal is in the idle state, the wireless connection signal measurement value of the mobile terminal selected by the self-operation based on the along-line BS2 target base station is modified to a reselection measurement value that meets the wireless connection quality requirements for the cell reselection condition of the adjacent cells of BS1 to BS2 in the idle state of the mobile terminal. After cell reselection is performed according to the along-line BS2 target base station, for example: by GB K+1 -GB N When the mobile terminal is in the idle state, the self-operation selects the along-line BS2 target base station in the adjacent cells of BS1 to BS2 during the Doppler movement of the mobile terminal along the line as the along-line target base station for cell reselection of the mobile terminal, and by GB K+1 -GB N The GB of the mobile terminal selected by the self-operation based on the along-line BS2 target base station when the mobile terminal is in the idle state K+1 -GB N The wireless connection signal measurement value of the mobile terminal is modified to a reselection measurement value that meets the wireless connection quality requirements for the cell reselection condition of the adjacent cells in the idle state of the mobile terminal. After cell reselection is performed according to the along-line BS2 target base station, GB K+1 -GB N The mobile terminal disconnects the wireless connection with the BS1 source base station in the current working state;

[0226] In this embodiment, in the adjacent cell Doppler different-frequency reselection function of the mobile terminal with self-operation in the idle state of the mobile terminal, during the adjacent cell Doppler different-frequency handover execution stage at the Doppler different-frequency handover position close to GABBS2M1 in one of the Doppler different-frequency handover positions in the BS1 to BS2 adjacent base station geographical model on the GAB determination route determined by the mobile terminal detection, according to GB K+1 -GB N The Doppler frequency adjustment and handover function of the mobile terminal, after confirming the adjustment and handover GB K+1 -GB N Based on the received Doppler frequency in the receiving frequency adjustment device of the BS1 source base station and the transmitted Doppler frequency in the transmitting frequency adjustment device of the mobile terminal, after detecting and determining the received Doppler frequency and transmitted Doppler frequency of the mobile terminal during the Doppler movement along the GAB determination route in the current idle state and the mobile terminal corresponding to the Doppler different-frequency handover position close to GABBS2M1 and the BS1 to BS2 adjacent base station geographical model, GB K+1 -GB NThe mobile terminal activates the wireless communication connection with the destination base station BS2 along the line, and restores the reselection measurement value that meets the wireless connection quality requirements of the adjacent cells BS1 to BS2 in the idle state of the mobile terminal to the measurement value of the wireless connection signal of the mobile terminal in the idle state within the destination base station BS2 along the line after cell reselection of the adjacent cells BS1 to BS2.

[0227] In this embodiment, in the adjacent cell Doppler different-frequency reselection function of the self-operating mobile terminal in the idle state of the mobile terminal, at the position of the end stage of the adjacent cell Doppler different-frequency handover of the mobile terminal at the Doppler different-frequency handover position in one of the Doppler different-frequency handover positions in the geographical model of the adjacent base stations BS1 to BS2 on the GAB determination route detected by the mobile terminal, which is close to GABBS2M1, GB K+1 -GB N The mobile terminal initiates the wireless communication connection with the destination base station BS2 along the line, at GB K+1 -GB N During the three stages of the Doppler different-frequency handover measurement reporting stage, execution stage, and end stage of the adjacent cells BS1 to BS2 of the mobile terminal formed at the Doppler different-frequency handover position in the current geographical model of the adjacent base stations BS1 to BS2 during the Doppler movement of the mobile terminal along the line, the cell handover or cell reselection of the mobile terminal from the source base station BS1 to the destination base station BS2 and GB are completed. K+1 -GB N Doppler frequency shift compensation for the received Doppler frequency and transmitted Doppler frequency of the mobile terminal is maintained at GB K+1 -GB N The mobile terminal forms GB at the position of the Doppler different-frequency handover position in the current geographical model of the adjacent base stations BS1 to BS2 during the Doppler movement along the GAB determination route, which is close to GABBS2M1. K+1 -GB N The working states before and after the cell handover or cell reselection of the BS1 to BS2 cells at the start position and end position of the adjacent cell Doppler different-frequency handover operation of the mobile terminal meet the requirements of the wireless connection and remain unchanged.

[0228] In this embodiment, during the Doppler movement of the mobile terminal along the route, when the geographical locations of multiple base stations on the GAB route with known geographical location are unknown, the mobile terminal determines the relative speed of the mobile terminal at the corresponding two different geographical locations relative to the destination base station through the Doppler shift values ​​received by the mobile terminal receiving device at two different geographical locations in the Doppler shift area of ​​the destination base station cell in the boundary area of ​​two adjacent base station cells, and determines the different angles between the relative speed direction of the mobile terminal at the two different geographical locations in the Doppler shift area of ​​the destination base station cell and the direction of the mobile terminal along the route according to the along-line movement speed and movement direction of the mobile terminal along the GAB route, and determines the two relative speed directions of the mobile terminal at the two different geographical locations in the Doppler shift area of ​​the destination base station cell relative to the destination base station through the two different angles of the mobile terminal at two different positions along the route in the destination base station cell. The intersection of the extension lines of the relative speed direction of the mobile terminal approximately determines the approximate geographical location of the destination base station. When it is similar or consistent with one of the established typical or special base station cell geographical models of the mobile terminal, the destination base station in the boundary area of ​​two adjacent base station cells is determined to be one of the typical or special base station cell geographical models of the mobile terminal, or when it is dissimilar with one of the established typical or special base station cell geographical models of the mobile terminal, a new base station cell geographical model of the mobile terminal that establishes the geometric relationship between the destination base station and the moving path is established for the destination base station in the boundary area of ​​two adjacent base station cells. Through the approximately determined base station cell geographical model, a geographical model of one of the base station cells in the Doppler movement process of the mobile terminal along the line is established, wherein the mobile terminal obtains communication signal information such as the transmission frequency of the destination base station along the line in the source base station cell in the boundary area of ​​two adjacent base station cells in the Doppler movement process along the line.

[0229] In this embodiment, according to the relationship among the start stage, execution stage, and end stage of the adjacent cell Doppler inter-frequency handover operation of the mobile terminal formed at one of the Doppler inter-frequency handover positions in the adjacent base station geographical model during the Doppler movement along the line of the mobile terminal, and in accordance with the Doppler frequency adjustment and handover function of the mobile terminal, in the three stages of the adjacent cell Doppler inter-frequency handover measurement reporting stage, execution stage, and end stage formed at one of the Doppler inter-frequency handover positions in one of the adjacent base station geographical models during the Doppler movement along the line of the mobile terminal, the cell handover or cell reselection of the mobile terminal from the source base station to the destination base station and the Doppler frequency shift compensation of the received Doppler frequency and transmitted Doppler frequency of the mobile terminal are completed, so as to keep the working states before and after the cell handover or cell reselection at the position of the start stage and the position of the end stage of the adjacent cell Doppler inter-frequency handover operation of the mobile terminal formed at one of the Doppler inter-frequency handover positions in one of the adjacent base station geographical models during the Doppler movement along the line of the mobile terminal meet the requirements of the wireless connection and remain unchanged.

[0230] Embodiment 9

[0231] The mobile terminal with Doppler frequency compensation and handover function in this embodiment is mainly used to implement the Doppler frequency compensation and handover method embodiment of the above embodiment.

[0232] A map with a planned route is pre-stored in the mobile terminal. Multiple base station cell geographical models and adjacent base station geographical models along the line are pre-generated in the planned route, and the frequency compensation selection combinations with Doppler frequency shift handover positions and corresponding Doppler frequency shift compensation values are included in the models; during the movement of the mobile terminal, according to the planned route, the selection combination distribution of the base station cell geographical model and the adjacent base station geographical model is formed, and the frequency compensation selection combination in the corresponding geographical model is formed.

[0233] A global positioning module, a timer, and a frequency adjustment module are provided in the mobile terminal; when the moving speed and moving direction of the mobile terminal along the line are determined through the global positioning module, and the Doppler frequency shift handover position of the mobile terminal is determined according to the current connected or idle state of the mobile terminal, the timer is started, the wireless communication connection is interrupted, and according to the corresponding compensation frequency value, the received Doppler frequency and transmitted Doppler frequency in the mobile terminal are adjusted through the frequency adjustment module. After the adjustment is completed, the timer is turned off and the wireless communication connection is restored.

[0234] The specific process of the mobile terminal implementing the Doppler frequency compensation and handover method can refer to the above method embodiment, and will not be elaborated here one by one.

[0235] Embodiment 10

[0236] This embodiment is to set up an APP in a mobile terminal that can implement the above-mentioned Doppler frequency compensation and switching method, including: displaying the content that needs to be implemented and the content that needs to be operated of the APP through the mobile terminal, the APP controls the receiving frequency adjustment device and the transmitting frequency adjustment device, the Doppler frequency shift compensation and switching timer, and the wireless connection timer in the mobile terminal through the connection between the operating system and the radio resource control Radio Resource Control in the mobile terminal, and determines the moving speed, moving direction and current position of the mobile terminal through the global positioning system.

[0237] The APP in the mobile terminal is provided with map information, and information such as multiple base station cells with known geographical locations and the receiving and transmitting frequencies of the base stations selected on a planned route with known geographical locations, as well as information such as the boundary areas of adjacent base station cells with known geographical locations, the receiving and transmitting frequencies of the source base station and the destination base station, and a base station cell geographical model or an adjacent base station geographical model established on this basis.

[0238] In this APP, according to the different combinations of the established base station cell geographical models and adjacent base station geographical models during the Doppler movement of the mobile terminal along a planned route, and according to the selection combination model of the Doppler frequency shift switching position and the Doppler frequency shift compensation value in the base station cell geographical model during the Doppler movement of the mobile terminal along the line, different selection combinations of the Doppler frequency shift switching position in the base station cell geographical model and the adjacent base station geographical model during the Doppler movement of the mobile terminal along a planned route, the corresponding mobile terminal Doppler frequency shift compensation value and the corresponding detection position are combined.

[0239] The specific process of implementing the Doppler frequency compensation and switching method by the APP can refer to the above method embodiment, which will not be described in detail here.

[0240] The above implementation cases only list common implementation methods of the present invention. The above implementation cases do not limit or represent the scope of protection of the present invention. Any implementation of the relevant cases according to the method described in the claims of the present invention is within the scope of protection of the present invention.

Claims

1. A Doppler frequency compensation and switching method for a mobile terminal, characterized in that: The method comprises the following steps: A map with a planned route is pre-stored in the mobile terminal, wherein a plurality of base station cell geographical models and adjacent base station geographical models along the route are pre-formed in the planned route; Pre-generate the Doppler frequency shift switching position and corresponding Doppler frequency shift compensation value selection combination distribution of the mobile terminal along the planned route in the base station cell geographical model, form the Doppler cell switching combination distribution of the mobile terminal in the base station cell geographical model, and the Doppler frequency switching position and corresponding Doppler frequency shift compensation value selection combination of the mobile terminal cell switching combination distribution along the adjacent base station geographical model; By switching Doppler cells in a base station cell geographic model during the movement of the mobile terminal along a determined route, the Doppler frequency switching and adjustment in the Doppler cell switching of the mobile terminal in the base station cell geographic model along the route are realized, and by cell switching of the mobile terminal and Doppler frequency shift compensation, the Doppler frequency switching in the adjacent base station geographic model is realized; Among them, in the geographical model of the base station cells along the line, the mobile terminal determines the moving speed and moving direction of the mobile terminal along the line through the global positioning module, and determines the Doppler frequency shift switching position of the mobile terminal in the Doppler cell switching combination distribution in the geographical model of the base station cell according to the current connection or idle state of the mobile terminal. Before the Doppler cell switching in the base station cell, the measured value of the wireless connection signal is preset, adjusted or modified to meet the conditions for the failure of the wireless signal connection of the mobile terminal, the wireless connection timer is started, the wireless communication connection is interrupted, and according to the Doppler frequency shift compensation value of the corresponding mobile terminal, the receiving Doppler frequency and the transmitting Doppler frequency in the mobile terminal are adjusted through the frequency adjustment module. After the adjustment is completed, the wireless connection timer is turned off to restore the wireless communication connection.

2. A mobile terminal Doppler frequency compensation and switching method according to claim 1, characterized in that: in, The method for generating the selected combination distribution of the Doppler frequency shift switching position and the corresponding Doppler frequency shift compensation value along the base station cell geographical model is as follows: By selecting the along-line moving speed and along-line moving direction of the Doppler frequency shift that affects the quality of the wireless connection signal of the mobile terminal, within the receiving frequency error range requirements of the mobile terminal and the receiving frequency error range requirements of the base station that meet the communication system standard, and under the condition that the requirements of the protection interval between multiple subcarrier frequencies within the base station receiving frequency bandwidth are met, the previous Doppler frequency shift switching position to the next Doppler frequency shift switching position in the base station cell geographical model during the along-line Doppler movement of the mobile terminal and the corresponding positive or negative change range of the Doppler frequency shift value of the mobile terminal are selected, according to different business requirements of the mobile terminal, under the condition that the minimum requirements of the wireless connection signal quality of the mobile terminal are met, the Doppler frequency shift switching position in the base station cell geographical model during the along-line Doppler movement of the mobile terminal, the corresponding positive or negative Doppler frequency shift compensation value based on the receiving center frequency of the mobile terminal, the corresponding receiving Doppler frequency of the mobile terminal, the negative or positive Doppler frequency shift compensation value based on the transmitting center frequency of the mobile terminal, and the corresponding transmitting Doppler frequency of the mobile terminal are formed.

3. A mobile terminal Doppler frequency compensation and switching method according to claim 1, characterized in that: A mobile terminal cell switching combination distribution is selected based on the Doppler inter-frequency switching position and the corresponding Doppler frequency shift compensation value along the geographical model of the adjacent base stations, to form the Doppler inter-frequency switching position of the destination base station of the mobile terminal, the corresponding positive or negative Doppler frequency shift compensation value based on the receiving center frequency of the mobile terminal, the corresponding receiving Doppler frequency of the mobile terminal, the negative or positive Doppler frequency shift compensation value based on the transmitting center frequency of the mobile terminal, and the corresponding transmitting Doppler frequency of the mobile terminal, wherein the Doppler inter-frequency switching position of the destination base station in the geographical model of the adjacent base stations is: one of the Doppler frequency shift switching positions in the boundary of the geographical model of the destination base station cell along the adjacent cell.

4. A mobile terminal Doppler frequency compensation and switching method according to claim 1, characterized in that: The mobile terminal is a mobile communication device connected to the base station in the mobile communication system. The mobile terminal has a global positioning receiving device, a receiving frequency adjustment device and a transmitting frequency adjustment device. The mobile terminal is provided with a map, a base station cell geographical model or an adjacent base station geographical model among multiple base stations along the line, a Doppler frequency shift switching position and a Doppler frequency shift compensation value selection combination model in the base station cell geographical model during the Doppler movement of the mobile terminal along the line, a Doppler frequency adjustment function at the Doppler frequency shift switching position or the Doppler frequency switching position in the mobile terminal, a base station cell Doppler frequency switching function of the mobile terminal, and an adjacent cell Doppler frequency switching function of the mobile terminal.

5. A mobile terminal Doppler frequency compensation and switching method according to claim 1, characterized in that: The process of forming the planned route is as follows: in a 2D or 3D map set in a mobile terminal, a road route from a starting position with a known geographical location to an end position, a railway route in a railway network, and other carrier routes that carry a carrier with a certain moving speed are selected to form a planned route. The planned route includes multiple base station cells with known base station geographical locations and communication parameters. A corresponding base station cell geographical model is established through the geometric relationship between one of the base stations and the mobile path in the base station cell, and a corresponding adjacent base station geographical model is established through the boundary area of ​​two adjacent base station cells at the junction of the source base station cell geographical model and the destination base station cell geographical model.

6. A mobile terminal Doppler frequency compensation and switching method according to claim 1, characterized in that: in, According to different base station cell geographical models, when a mobile terminal moves along a planned route, it approaches, is perpendicular to, and moves away from a base station, forming multiple Doppler frequency shift switching positions and different combinations of corresponding Doppler frequency shift compensation values. When the mobile terminal approaches a base station, the Doppler frequency shift compensation value is positive, when it is perpendicular to the base station, the Doppler frequency shift compensation value is zero, and when it is away from the base station, the Doppler frequency shift compensation value is negative. When the mobile terminal moves away from a source base station to a destination base station in an adjacent base station geographical model, the Doppler frequency shift compensation value changes from a negative value to a positive value.

7. A mobile terminal Doppler frequency compensation and switching method according to claim 1, characterized in that: During the Doppler movement of a mobile terminal along a route, when the geographical locations of multiple base stations on a planned route with a known geographical location are unknown, the relative speed of the mobile terminal relative to the destination base station is determined according to two Doppler frequency shift compensation values ​​received by the mobile terminal at two Doppler frequency shift switching positions in a geographical model of an adjacent base station, the angle at the two Doppler frequency shift switching positions is determined according to the relationship between the two relative speeds and the moving speed along the route, the geographical location of the base station is determined according to the extension line forming the two angles, and the base station cell geographical model of the base station and the adjacent base station geographical model are reconstructed, and a plurality of Doppler frequency shift switching positions along the route and corresponding Doppler frequency shift compensation values ​​are generated accordingly.

8. A mobile terminal Doppler frequency compensation and switching method according to claim 2, characterized in that: The business needs of the mobile terminal specifically include: a customized or adaptive base station cell Doppler frequency switching requirement in the connected state of the mobile terminal, a self-operated base station cell Doppler frequency switching requirement in the idle state of the mobile terminal, a customized or adaptive adjacent cell Doppler frequency switching requirement in the connected state of the mobile terminal, and a self-operated adjacent cell Doppler frequency reselection requirement in the idle state of the mobile terminal.

9. A mobile terminal Doppler frequency compensation and switching method according to claim 1, characterized in that: in, According to the different combinations of the established base station cell geographical model and the adjacent base station geographical model during the Doppler movement of the mobile terminal along a planned route, and according to the selection combination model of the Doppler frequency shift switching position and the Doppler frequency shift compensation value in the base station cell geographical model during the Doppler movement of the mobile terminal along the line, different selection combinations of the Doppler frequency shift switching position and the corresponding Doppler frequency shift compensation value of the mobile terminal in the base station cell geographical model and the adjacent base station geographical model during the Doppler movement of the mobile terminal along the planned route are formed, forming different selection combinations of the Doppler frequency shift switching position and the corresponding Doppler frequency shift compensation value of the mobile terminal in the geographical model of a planned route along the line, or in the geographical model of a selected area on a planned route, or in the base station cell geographical model on a planned route, and different selection combinations of the Doppler frequency switching position and the corresponding Doppler compensation value of the mobile terminal in the adjacent base station geographical model.

10. A mobile terminal Doppler frequency compensation and switching method according to claim 1, characterized in that: in, The moving time of the mobile terminal from the last Doppler frequency shift switching position to the next adjacent Doppler frequency shift switching position in the base station cell geographical model should be greater than the operation time at the Doppler frequency shift switching position. If less than the operation time at the next Doppler frequency shift switching position, the operation at the next Doppler frequency shift switching position is abandoned. When the Doppler frequency shift switching position of the mobile terminal is determined as the position of the end stage of the Doppler frequency switching of the base station cell of the mobile terminal according to the along-line moving speed, moving direction and the operation time required for the Doppler frequency switching of the mobile terminal, the starting stage, adjustment stage and end stage of the Doppler frequency switching of each Doppler frequency shift switching position in the base station cell geographical model are formed according to the operation time of the Doppler frequency adjustment and the moving speed and moving direction of the mobile terminal, and the starting stage position of the Doppler frequency switching operation is calculated to form different selection combinations of the Doppler frequency shift switching position in the base station cell geographical model and the corresponding starting stage position of the Doppler frequency switching operation of the mobile terminal base station cell; When one of the Doppler inter-frequency switching positions in the adjacent base station geographical model is determined as the position of the end stage of the Doppler inter-frequency switching of the adjacent cell of the mobile terminal, the starting stage, adjustment stage and ending stage of the Doppler inter-frequency switching position are formed according to the operation time of the Doppler inter-frequency switching adjustment stage, the Doppler moving speed along the line and the moving direction of the mobile terminal, and the starting stage position of the Doppler inter-frequency switching operation is calculated to form different selection combinations of the Doppler inter-frequency switching position of the adjacent base station geographical model and the corresponding starting stage position of the Doppler inter-frequency switching operation of the adjacent cell of the mobile terminal.

11. A mobile terminal Doppler frequency compensation and switching method according to claim 1, characterized in that: The Doppler frequency adjustment is performed at the Doppler frequency shift switching position or the Doppler frequency switching position in the mobile terminal, specifically: Serially adjusting a receiving frequency adjustment device and a transmitting frequency adjustment device in the mobile terminal in a front-to-back order; Or the receiving frequency adjustment device and the transmitting frequency adjustment device in the mobile terminal are adjusted in parallel in a sequential order.

12. A mobile terminal Doppler frequency compensation and switching method according to claim 1, characterized in that: include: A certain route in a map set by the mobile terminal, a current position in a geographical model of a base station cell where the mobile terminal is currently located during Doppler movement along the certain route, and according to a combination relationship between a current connection or idle state of the mobile terminal and a Doppler frequency shift switching position in the geographical model of the current base station cell where the mobile terminal is currently located, a corresponding Doppler frequency shift compensation value of the mobile terminal, and a corresponding starting stage position of the base station cell Doppler frequency switching of the mobile terminal, detecting and determining a current connection or idle state of the mobile terminal during Doppler movement along the certain route and a group of Doppler frequency shift switching positions in the geographical model of the current base station cell where the mobile terminal is currently located, and a corresponding group of receiving Doppler frequencies and transmitting Doppler frequencies of the mobile terminal in the geographical model of the base station cell where the mobile terminal is currently located, and a corresponding starting stage position of the base station cell Doppler frequency switching of the mobile terminal, or detecting and determining a current connection or idle state of the mobile terminal during Doppler movement along the certain route and a Doppler frequency shift switching position in a group of the geographical model of the current base station cell where the mobile terminal is currently located, and a corresponding pair of receiving Doppler frequencies and transmitting Doppler frequencies of the mobile terminal in the geographical model of the base station cell where the mobile terminal is currently located, and a corresponding starting stage position of the base station cell Doppler frequency switching of the mobile terminal in the group; Among them, the combined relationship between the current connection or idle state of the mobile terminal and the Doppler frequency shift switching position in the geographical model of the current base station cell, the corresponding mobile terminal Doppler frequency shift compensation value and the corresponding mobile terminal base station cell Doppler frequency switching starting stage position is: at the current position of the mobile terminal during the Doppler movement along a certain route, when the current working state of the mobile terminal is an idle state, through the along-line moving speed of the current position in the geographical model of the base station cell during the Doppler movement of the mobile terminal along a certain route and the moving direction along a certain route, according to the different requirements of the wireless connection quality of the business needs of the self-operated base station cell Doppler frequency switching in the idle state of the mobile terminal, a group of Doppler frequency shift switching positions with a smaller number in the geographical model of the base station cell where the mobile terminal is currently located during the Doppler movement of the mobile terminal along a certain route are selected. A combination of switching positions, and a corresponding set of mobile terminal Doppler frequency shift compensation values ​​and a corresponding set of mobile terminal base station cell Doppler frequency switching starting stage positions; when the current working state of the mobile terminal is a connected state, through the moving speed along the line of the current position in the base station cell geographical model during the Doppler movement of the mobile terminal along a certain route and the moving direction along a certain route, according to the different requirements of wireless connection quality of the business needs of the customized or adaptive base station cell Doppler frequency switching in the mobile terminal connection state, a combination of a group of Doppler frequency shift switching positions with a larger number in the base station cell geographical model where the mobile terminal is currently located during the Doppler movement of the mobile terminal along a certain route, and a corresponding set of mobile terminal Doppler frequency shift compensation values ​​and a corresponding set of mobile terminal base station cell Doppler frequency switching starting stage positions are selected.

13. A mobile terminal Doppler frequency compensation and switching method according to claim 1, characterized in that: include: According to the relationship between the starting stage, adjustment stage and ending stage of the base station cell Doppler frequency switching of the mobile terminal formed at the Doppler frequency shift switching position in the geographical model of the base station cell where the mobile terminal is currently located during the Doppler movement of the mobile terminal along the line, the Doppler frequency shift compensation and switching of the receiving Doppler frequency and the transmitting Doppler frequency of the mobile terminal are completed, so that the working state of the mobile terminal before the starting stage and after the ending stage of the base station cell Doppler frequency switching formed at the Doppler frequency shift switching position in the geographical model of the base station cell where the mobile terminal is currently located during the Doppler movement of the mobile terminal along the line is kept unchanged to meet the requirements of wireless connection.

14. A mobile terminal Doppler frequency compensation and switching method according to claim 13, characterized in that: When the mobile terminal is at the starting stage of the Doppler frequency switching operation, if the current working state of the mobile terminal is the connected state and the base station cell Doppler frequency switching is performed, by presetting the measurement value of the wireless connection signal customized selected in the connected state of the mobile terminal as the assumed measurement value that meets the wireless connection failure requirement in the connected state of the mobile terminal, the mobile terminal starts the Doppler frequency shift compensation and switching timer newly added in the original communication system, and the mobile terminal interrupts the wireless communication connection in the current working state; In the adjustment phase, a Doppler frequency switching operation is performed. After determining that the receiving Doppler frequency in the receiving frequency adjustment device of the mobile terminal and the transmitting Doppler frequency in the transmitting frequency adjustment device are compensated frequencies, the mobile terminal turns off the newly added Doppler frequency shift compensation and switching timer in the original communication system, the mobile terminal starts a wireless communication connection with the base station cell, and restores the assumed measurement value that meets the wireless connection failure requirement of the mobile terminal in the connection state to be the measurement value of the wireless connection signal in the mobile terminal connection state; At the end stage, the Doppler shift compensation and switching of the receiving Doppler frequency and the transmitting Doppler frequency of the mobile terminal are completed, so that the working state of the mobile terminal remains unchanged to meet the requirements of the wireless connection.

15. A mobile terminal Doppler frequency compensation and switching method according to claim 13, characterized in that: When the mobile terminal is at the starting stage of the Doppler frequency switching operation, and the current working state of the mobile terminal is the connection state to perform the base station cell Doppler frequency switching, by adjusting the measurement value of the adaptively selected wireless connection signal to a corrected measurement value that meets the wireless connection failure requirement of the mobile terminal in the connection state, the mobile terminal starts a timer for the wireless connection already in the original communication system by assuming that the number of wireless connection failures received by the mobile terminal reaches a preset value, and the mobile terminal suspends and shuts down the wireless communication connection with the base station; In the adjustment phase, a Doppler frequency switching operation is performed. After the mobile terminal confirms that the receiving Doppler frequency in the receiving frequency adjustment device and the transmitting Doppler frequency in the transmitting frequency adjustment device have been adjusted, the mobile terminal turns off the timer for the wireless connection by assuming that the number of synchronization signals of the wireless connection received by the mobile terminal reaches a preset value. The mobile terminal starts a wireless communication connection with the base station cell and restores the corrected measurement value that meets the wireless connection failure requirement of the mobile terminal in the connection state to be the measurement value of the wireless connection signal in the mobile terminal connection state; At the end stage, the Doppler shift compensation and switching of the receiving Doppler frequency and the transmitting Doppler frequency of the mobile terminal are completed, so that the working state of the mobile terminal remains unchanged to meet the requirements of the wireless connection.

16. A mobile terminal Doppler frequency compensation and switching method according to claim 1, characterized in that: When the mobile terminal is at the starting stage of the Doppler frequency switching operation, if the current working state of the mobile terminal is an idle state and the base station cell Doppler frequency switching is performed, the mobile terminal enters the idle state of the base station cell Doppler frequency compensation and switching by modifying the measurement value of the wireless connection signal selected by the mobile terminal in the idle state to a revised measurement value that meets the wireless connection failure requirement of the mobile terminal in the idle state; In the adjustment phase, a Doppler frequency switching operation is performed. After determining that the receiving Doppler frequency in the receiving frequency adjustment device and the transmitting Doppler frequency in the transmitting frequency adjustment device are compensated frequencies, the mobile terminal leaves the Doppler frequency shift compensation and switching state in the idle state, the mobile terminal starts a wireless communication connection with the base station cell, and the revised measurement value that meets the wireless connection failure requirement of the mobile terminal in the restored connection state is the measurement value of the wireless connection signal in the idle state of the mobile terminal; At the end stage, the Doppler shift compensation and switching of the receiving Doppler frequency and the transmitting Doppler frequency of the mobile terminal are completed, so that the working state of the mobile terminal remains unchanged to meet the requirements of the wireless connection.

17. A mobile terminal Doppler frequency compensation and switching method according to claim 1, characterized in that: A mobile terminal in a border area between two adjacent base station cells, when the current working state is an idle state, selects one of a group of Doppler frequency shift switching positions with a smaller number of Doppler frequency shift switching positions in a geographical model of a source base station cell in the border area between the two adjacent base station cells, which is far away from the Doppler frequency shift switching position, and selects one of a group of Doppler frequency shift switching positions with a smaller number of Doppler frequency shift switching positions in a geographical model of a destination base station cell in the border area between the two adjacent base station cells, which is close to the Doppler frequency shift switching position, and a corresponding pair of mobile terminal Doppler frequency shift compensation values; When the current working state is the connected state, select one of a group of Doppler frequency shift switching positions with a large number of Doppler frequency shift switching positions in the geographical model of the source base station cell in the boundary area of ​​the two adjacent base station cells, which is far away from the Doppler frequency shift switching position, and select one of a group of Doppler frequency shift switching positions with a large number of Doppler frequency shift switching positions in the geographical model of the destination base station cell in the boundary area of ​​the two adjacent base station cells, which is close to the Doppler frequency shift switching position, and the corresponding mobile terminal Doppler frequency shift compensation value.

18. A mobile terminal Doppler frequency compensation and switching method according to claim 1, characterized in that: When the mobile terminal completes the Doppler frequency switching in the adjacent base station geographical model and cannot establish a wireless connection with the target base station in the target base station cell, the mobile terminal performs frequency switching according to the Doppler frequency shift compensation value corresponding to the Doppler frequency shift switching position currently approaching in the target base station cell.

19. A mobile terminal Doppler frequency compensation and switching method according to claim 8, characterized in that: When the mobile terminal is in a connected state and performs Doppler frequency switching of an adjacent cell, the mobile terminal customizes the selection of the destination base station along the line in the geographical model of the adjacent base station, and customizes the newly added measurement value of the wireless connection signal based on the destination base station along the line, which is preset as the preset measurement value that meets the wireless connection quality requirement of the cell switching condition of the mobile terminal in the connected state of the mobile terminal and sent to the source base station. After receiving the execution instruction and related configuration information of the cell switching of the source base station, the mobile terminal disconnects the wireless connection with the source base station. After completing the Doppler frequency switching in the geographical model of the adjacent base station, the mobile terminal starts the wireless communication connection with the destination base station along the line, and restores the measurement value of the wireless connection signal in the connected state; After completing the cell switching or cell reselection of the mobile terminal from the source base station to the destination base station and the Doppler shift compensation of the receiving Doppler frequency and the transmitting Doppler frequency of the mobile terminal, the working state is maintained to meet the requirements of the wireless connection unchanged. The Doppler frequency switching in the adjacent geographical model is: based on the cell switching or cell reselection of the mobile terminal, the Doppler frequency switching of the mobile terminal based on the destination base station is added.

20. A mobile terminal Doppler frequency compensation and switching method according to claim 8, characterized in that: When the mobile terminal is in a connected state and performs Doppler frequency switching of an adjacent cell, it adaptively selects a destination base station along the line in the adjacent cell, and adaptively selects an adjusted measurement value based on the wireless connection signal measurement value of the destination base station along the line to adjust to the wireless connection quality requirement that meets the cell switching condition of the adjacent cell in the connected state of the mobile terminal, and sends it to the source base station. After receiving the execution instruction and related configuration information of the cell switching of the source base station, the mobile terminal disconnects the wireless communication connection with the source base station in the current working state; after completing the Doppler frequency switching in the geographical model of the adjacent base station, the mobile terminal starts the wireless communication connection with the destination base station along the line, and restores the measurement value of the wireless connection signal in the connected state; After completing the cell handover or cell reselection of the mobile terminal from the source base station to the destination base station and the Doppler shift compensation of the receiving Doppler frequency and the transmitting Doppler frequency of the mobile terminal, the working state is maintained to meet the requirements of the wireless connection; The Doppler frequency switching in the adjacent geographical model is: based on the cell switching or cell reselection of the mobile terminal, the Doppler frequency switching of the mobile terminal based on the destination base station is added.

21. A mobile terminal Doppler frequency compensation and switching method according to claim 8, characterized in that: When the mobile terminal is in an idle state and performs Doppler inter-frequency switching of an adjacent cell by self-operation, the mobile terminal selects a destination base station along the line in the adjacent cell by self-operation, and at the same time modifies the measurement value of the wireless connection signal based on the destination base station along the line selected by self-operation to a reselection measurement value that satisfies the wireless connection quality requirement of the cell reselection condition of the adjacent cell in the idle state of the mobile terminal, and the mobile terminal performs cell reselection according to the destination base station along the line in the geographical model of the adjacent base stations along the line, and after completing the Doppler inter-frequency switching in the geographical model of the adjacent base stations, the measurement value of the wireless connection signal in the idle state is restored; After completing the cell handover or cell reselection of the mobile terminal from the source base station to the destination base station and the Doppler shift compensation of the receiving Doppler frequency and the transmitting Doppler frequency of the mobile terminal, the working state is maintained to meet the requirements of the wireless connection; The Doppler frequency switching in the adjacent geographical model is: based on the cell switching or cell reselection of the mobile terminal, the Doppler frequency switching of the mobile terminal based on the destination base station is added.

22. A mobile terminal having the Doppler frequency compensation and switching method according to any one of claims 1 to 21, characterized in that: A map with a planned route is pre-stored in the mobile terminal, in which a plurality of base station cell geographical models and adjacent base station geographical models along the route are pre-generated, and the model contains frequency compensation selection combinations of Doppler frequency shift switching positions and corresponding Doppler frequency shift compensation values ​​along the route; during the movement of the mobile terminal, a selection combination distribution of the base station cell geographical model and the adjacent base station geographical model is formed according to the planned route, and a frequency compensation selection combination in the corresponding geographical model is formed; The mobile terminal is provided with a global positioning module, a timer and a frequency adjustment module; when the moving speed and moving direction of the mobile terminal along the line are determined by the global positioning module, and the Doppler frequency shift switching position of the mobile terminal is determined according to the current connection or idle state of the mobile terminal, the timer is started, the wireless communication connection is interrupted, and the receiving Doppler frequency and the transmitting Doppler frequency in the mobile terminal are adjusted according to the corresponding compensation frequency value through the frequency adjustment module. After the adjustment is completed, the timer is turned off and the wireless communication connection is restored.

23. An APP based on the mobile terminal Doppler frequency compensation and switching method according to any one of claims 1 to 21, characterized in that: The APP is installed in a mobile terminal, and the content to be implemented and the content to be operated of the APP are displayed through the mobile terminal. The APP controls the receiving frequency adjustment device and the transmitting frequency adjustment device, the Doppler frequency shift compensation and switching timer, and the wireless connection timer in the mobile terminal through the connection between the operating system and the radio resource control Radio Resource Control in the mobile terminal, and determines the moving speed, moving direction and current position of the mobile terminal through the global positioning system; The APP is provided with map information, and information on multiple base station cells with known geographical locations and receiving and transmitting frequencies of the base stations selected on a certain planned route with known geographical locations, as well as information on the boundary areas of adjacent base station cells with known geographical locations, receiving frequencies and transmitting frequencies of the source base station and the destination base station, and a base station cell geographical model or an adjacent base station geographical model established on this basis; In the APP, according to the different combinations of the established base station cell geographical models and adjacent base station geographical models during the Doppler movement of the mobile terminal along a planned route, and according to the selection combination model of the Doppler frequency shift switching position and the Doppler frequency shift compensation value in the base station cell geographical model during the Doppler movement of the mobile terminal along the line, different selection combinations of the Doppler frequency shift switching position and the corresponding mobile terminal Doppler frequency shift compensation value in the base station cell geographical model and the adjacent base station geographical model during the Doppler movement of the mobile terminal along a planned route are combined.

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