CN108605202B - Communication method and terminal - Google Patents
Communication method and terminal Download PDFInfo
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- CN108605202B CN108605202B CN201680080802.5A CN201680080802A CN108605202B CN 108605202 B CN108605202 B CN 108605202B CN 201680080802 A CN201680080802 A CN 201680080802A CN 108605202 B CN108605202 B CN 108605202B
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W4/00—Services specially adapted for wireless communication networks; Facilities therefor
- H04W4/02—Services making use of location information
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L27/00—Modulated-carrier systems
Abstract
The application discloses a communication method and a terminal, wherein the method comprises the following steps: and determining the moving speed of the terminal, and determining the calibration coefficient of the communication parameter of the terminal according to the moving speed. Therefore, the terminal calibrates the communication parameters in time after adjusting the calibration coefficient of the communication parameters, and can match the rapid change of the offset of the communication parameters of the terminal moving at a high speed, thereby improving the communication performance.
Description
Technical Field
The present application relates to the field of communications, and in particular, to a communication method and a terminal.
Background
With the development of communication technology, the demand of users for mobile office work using terminals is increasing, and therefore, the demand for service performance of high-speed mobile terminal communication is also increasing.
However, based on the history and the experience data, when the terminal is moving fast, if the communication policy at the time of standstill is still adopted, the communication performance of the terminal may be degraded, such as the communication quality is degraded.
Disclosure of Invention
The application provides a communication method and a terminal, and aims to solve the technical problem that the communication performance is reduced when the terminal in high-speed movement performs data communication.
A first aspect of the present application provides a communication method, including the steps of: the terminal determines the moving speed of the terminal; and determining a calibration coefficient of the communication parameter of the terminal according to the moving speed. Therefore, after the calibration coefficient of the communication parameter is determined based on the moving speed, the communication is carried out according to the calibrated communication parameter, so that various communication deviations are reduced or avoided as much as possible, and the communication performance is improved.
A second aspect of the present application provides a terminal, comprising the following structure: the processor executes the application program to determine the moving speed of the terminal and determine the calibration coefficient of the communication parameter of the terminal according to the moving speed. Therefore, after the terminal determines the calibration coefficient of the communication parameter based on the moving rate, the terminal communicates with the calibrated communication parameter, so that various communication deviations are reduced or avoided as much as possible, and the communication performance is improved.
In one implementation, the determining, by the terminal, calibration parameters of communication parameters of the terminal according to the moving rate includes: if the moving speed of the terminal is greater than or equal to a first threshold value, calibrating the frequency of the channel carrier signal received by the terminal by using a first calibration coefficient; if the moving speed of the terminal is smaller than the first threshold and is larger than or equal to a second threshold smaller than the first threshold, calibrating the frequency of the channel carrier signal received by the terminal by using a preset second calibration coefficient; and if the moving speed of the terminal is smaller than the second threshold value, calibrating the frequency of the channel carrier signal received by the terminal by using a preset third calibration coefficient. Therefore, the terminal determines the calibration parameters of the channel carrier signal frequency of the terminal based on the moving rate, demodulates the communication signals carried by the channel carrier signal with the calibrated channel carrier signal frequency, adopts a smaller calibration coefficient when the moving rate is lower, further reduces the frequency offset adjustment jitter, adopts a larger calibration coefficient when the moving rate is higher, accelerates the frequency tracking rate, matches the rapid change of the fast moving frequency offset, and better improves the communication performance.
In one implementation manner, the determining, by the terminal, the calibration coefficient of the communication parameter of the terminal according to the moving rate specifically includes: if the moving speed of the terminal is greater than or equal to a first threshold value, calibrating the channel estimation value of the terminal by using a preset first interpolation factor set; if the moving speed of the terminal is smaller than the first threshold and is larger than or equal to a second threshold smaller than the first threshold, calibrating the channel estimation value of the terminal by using a preset second interpolation factor set; and if the moving speed of the terminal is less than the second threshold value, calibrating the channel estimation value of the terminal by using a preset third interpolation factor set. Therefore, the terminal determines the calibration coefficient of the channel estimation value of the terminal based on the mobile speed, namely, the channel estimation value in different interpolation factor set pairs is calibrated based on different mobile speeds, the channel is determined according to the calibrated channel estimation value, and then the communication signal carried by the carrier signal in the channel is demodulated, so that the rapid change of the channel deviation under the condition of not using the mobile speed is matched, and the communication performance is better improved.
In one implementation, after determining the moving rate of the terminal, the terminal is further configured to: and adjusting parameters of the terminal network selection based on the moving rate, so that the terminal selects a target network for communication based on the adjusted parameters, the distance between a base station of the target network and the terminal is minimum, and the distance is reduced along with the movement of the terminal. Therefore, the terminal determines the target network which is closest to the moving speed and the moving direction of the target network to communicate based on the moving speed, and communication performance is improved better.
Drawings
In order to more clearly illustrate the embodiments of the present application or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below, it is obvious that the drawings in the following description are only some embodiments of the present application, and for those skilled in the art, other drawings can be obtained according to the drawings without creative efforts.
Fig. 1 is a schematic diagram of communication between a terminal and a base station;
fig. 2 and fig. 3 are flow charts of a communication method according to an embodiment of the present invention;
FIG. 4 is an exemplary diagram of an embodiment of the present invention;
fig. 5 is another flowchart of a communication method according to an embodiment of the present invention;
FIG. 6 is another exemplary diagram of an embodiment of the present invention;
fig. 7 is a schematic structural diagram of a terminal according to an embodiment of the present invention.
Detailed Description
Fig. 1 is a schematic diagram illustrating communication between a terminal and a base station, for example, when the terminal communicates with the base station on a railway moving at a high speed, in a cell service network in which the terminal is located, the terminal and the base station transmit data signals through carrier signals in a channel.
In the fast movement of the terminal, the carrier signal in the channel also has doppler frequency deviation, or the estimated value of the channel where the carrier signal is located also has deviation, and these deviations may cause the phenomenon of network drop and affect the communication performance of the terminal.
The doppler effect is that the observer reception frequency becomes high when the wave source moves toward the observer, and the observer reception frequency becomes low when the wave source moves away from the observer. Thus, when the terminal moves relative to the base station, the frequency and/or the channel estimation value of the channel carrier signal received by the terminal may deviate. Assuming that the wavelength of the channel carrier signal between the base station and the terminal is λ, the wave velocity is c, the moving speed of the terminal is v, the frequency of the channel carrier signal is (c + v)/λ when the terminal moves close to the base station, and the frequency of the channel carrier signal is (c-v)/λ when the terminal moves far from the base station, accordingly, similar deviations occur in the channel estimation values.
Fig. 2 is a flowchart illustrating an implementation of a communication method according to an embodiment of the present invention, for solving a problem of communication performance degradation when a terminal moving at a high speed performs communication, where fig. 2 illustrates communication of a terminal on a high-speed rail, and the terminal performs the following steps to solve the problem:
s201: and collecting highspeed flag in the system message.
The system message is a message in a network where the terminal is located, and the high speed flag can represent whether a cell network where the terminal is located supports selection of cyclic shift of a ZC (Zadoff-Chu) sequence in high speed movement, so as to represent whether the terminal is in a high-speed rail private network, that is, whether the terminal is in a riding state.
S202: judging the value of the highspeed flag, if the value of the highspeed flag is true, indicating that the terminal is in a high-speed moving state, executing S203 to S204, if the value of the highspeed flag is false, indicating that the terminal is possibly in a non-high-speed moving state, and executing S205.
S203: the sensor parameters of the individual sensors (sensors) are obtained by a sensor hub (sensor hub).
Among these sensors, there may be: acceleration sensor, gyroscope, barometer, and the like. The corresponding sensing parameters may be: acceleration, inclination, air pressure and the like.
S204: based on the obtained sensing parameters in step S203, the moving speed of the terminal is obtained, and it is determined whether the moving speed of the terminal exceeds a preset first threshold.
The sensing parameters comprise sensing parameters obtained by various sensors, and the moving speed of the terminal is obtained based on at least one sensing parameter.
S205: and judging whether the terminal is in a riding state or not through the sensor concentrator, and if so, executing S206.
In this embodiment, the sensor hub determines whether the terminal is in a riding state by integrating the sensing parameters of each sensor and by using general algorithms such as a classifier and a decision tree in combination with specific implementations.
S206: the moving speed of the terminal is acquired by using a Global Positioning System (GPS) in the terminal, and S207 is executed.
In the embodiment, before the GPS is used for acquiring the moving speed of the terminal, whether the terminal is in a riding state or not is judged in advance through the sensor concentrator, the GPS is started only when the terminal is in the riding state, and the moving speed of the terminal is acquired through the GPS, so that the GPS does not need to be triggered to acquire the moving speed when the terminal is not in the riding state, and unnecessary resource consumption is avoided.
S207: it is determined whether the rate of movement is greater than or equal to a first threshold.
The first threshold above may be set according to requirements, such as 200km/h (kilometers per hour).
The above-mentioned S201 to S207 are intended to obtain the moving rate of the terminal and determine whether the moving rate of the terminal exceeds the first threshold.
When the moving rate of the terminal is determined to exceed (be greater than or equal to) the first threshold in S204, or when the moving rate is determined to exceed the first threshold in S207, the frequency of the channel carrier signal received by the terminal may be deviated, and if the communication signal carried by the channel carrier signal cannot be demodulated without performing timely adjustment or calibration, a phenomenon of network drop or service interruption may occur.
In this embodiment, the terminal may calibrate the frequency of the carrier signal in the channel based on the real-time rate to avoid a situation that the terminal drops a network or a terminal service, specifically, the terminal performs S208 to S211 to calibrate the frequency of the carrier signal in the channel, as shown in fig. 2, if the moving rate exceeds the first threshold, S208 is performed, and if the moving rate does not exceed the first threshold, S209 is performed:
s208: and calibrating the frequency of the received channel carrier signal by using a preset first calibration coefficient.
S209: and judging whether the moving speed is greater than or equal to a preset second threshold and smaller than the first threshold, wherein the second threshold is smaller than the first threshold, the second threshold can be 100km/h or 80km/h, if the moving speed exceeds the second threshold, executing S210, and if the moving speed is smaller than the second threshold, executing S211.
S210: and calibrating the frequency of the received channel carrier signal by using a preset second calibration coefficient.
S211: and calibrating the frequency of the received channel carrier signal by using a preset third calibration coefficient.
The first calibration coefficient, the second calibration coefficient and the third calibration coefficient here have values between 0 and 1, and the first calibration coefficient is larger than the second calibration coefficient, which is larger than the third calibration coefficient.
In this embodiment, when the calibration coefficient is used to calibrate the frequency of the received channel carrier signal, the following formula (1) may be specifically adopted:
f1＝f2+a×Δf (1)
wherein:
f1 is the calibrated channel carrier signal frequency.
f2 is the channel carrier signal frequency received by the terminal.
Δ f is the calibration frequency, and in specific implementations Δ f may be a positive value or a negative value.
Based on the relevant content of the doppler effect in the foregoing, the positive and negative values of Δ f depend on the relative operation condition between the terminal and the base station. For example, when the terminal moves close to the base station, Δ f takes a positive value, and when the terminal moves away from the base station, Δ f takes a negative value.
The value of Δ f is based on the relevant content of the doppler effect in the foregoing, and depends on the ratio between the moving speed v of the terminal relative to the base station and the propagation speed of the signal in the medium (air).
a is a calibration coefficient, and a takes different values based on different moving rates of the terminal, for example: when the moving speed of the terminal is greater than a first threshold value, a takes the value a1 (the terminal is on a high-speed running high-speed rail), when the moving speed of the terminal is less than the first threshold value but greater than a second threshold value, a takes the value a2 (the terminal is on a high-speed running vehicle such as a bus), when the moving speed of the terminal is less than the second threshold value, a takes the value a3 (the terminal is in a static or walking state), a1 is greater than a2, and a2 is greater than a 3.
Thus, the terminal demodulates the communication signal carried by the channel carrier signal at the calibrated channel carrier signal frequency, for example: the method comprises the steps of using a steady frequency calibration scheme in a non-high-speed rail scene, for example, using a small calibration coefficient to reduce frequency offset adjustment jitter, and using a fast tracking frequency offset adjustment scheme in a high-speed rail scene, for example, using a large calibration coefficient to accelerate the frequency tracking rate so as to match the fast change of frequency offset in the high-speed rail scene, thereby improving the communication performance.
When the moving rate of the terminal is determined to exceed the first threshold in S204, or when the moving rate is determined to exceed the first threshold in S207, a channel estimation value of a carrier signal received by the terminal may also have a deviation, and if the communication signal carried by the carrier signal cannot be demodulated, a phenomenon of network drop or service interruption may occur if the communication signal is not adjusted or calibrated in time.
In this embodiment, the terminal performs calibration of the channel estimation value of the terminal by performing S212 to S215, as shown in fig. 3, if the moving rate is greater than or equal to (exceeds) the first threshold, performing S212, and if the moving rate does not exceed the first threshold, performing S213:
s212: and calibrating the channel estimation value by using a preset first interpolation factor set.
S213: it is determined whether the moving speed is greater than or equal to (exceeds) a preset second threshold and less than the first threshold, the second threshold being less than the first threshold, if the moving speed exceeds the second threshold, S214 is performed, and if the moving speed is less than the second threshold, S215 is performed.
S214: and calibrating the channel estimation value by using a preset second interpolation factor set.
S215: and calibrating the channel estimation value by using a preset third interpolation factor set.
The first, second and third interpolation factors are different, and the values of the interpolation factors are between 0 and 1 and are adjustable.
In this embodiment, the frequency domain response value at the pilot channel may be estimated by using the pilot, and then the channel estimation value at the non-pilot carrier may be obtained by using an interpolation scheme, for example, the following formula (2) is used to calibrate the channel estimation value of the non-pilot carrier:
H(m，l)＝b1×H(m-1，l)+b2×H(m+1，l)+b3×H(m，l-1)+b4×H(m，l+1) (2)
wherein:
m in H (m, l) is a row identifier, l is a column identifier, H (m, l) is a channel estimation value where the pilot frequency of the mth row and the lth column is located, and H (m-1, l), H (m +1, l), H (m, l-1) and H (m, l +1) are channel estimation values where four adjacent non-pilot carrier signals of H (m, l) are located respectively, as shown in fig. 4, a grid adjacent to the periphery (up, down, left and right) with H (m, l) as the center.
b 1-b 4 are interpolation factors, respectively, and based on the difference of the moving speed of the terminal, the values of b 1-b 4 are different, for example: when the moving speed of the terminal is greater than the first threshold, for example, when the terminal is on a high-speed rail running at a high speed, the values of b 1-b 4 may be: 0.3, 0.7 and 0.7; when the moving speed of the terminal is smaller than the first threshold but larger than the second threshold, for example, when the terminal is located on a vehicle such as a bus running at a high speed, the values of b 1-b 4 may be: 0.5, 0.5 and 0.5; when the moving speed of the terminal is less than the second threshold, if the terminal is in a stationary or walking state, the values of b 1-b 4 may be: 0.7, 0.3 and 0.3.
Therefore, the terminal determines the channel according to the calibrated channel estimation value, and demodulates the communication signal carried by the carrier signal in the channel so as to match the rapid change of the channel deviation in the high-speed rail scene, thereby improving the communication performance.
In addition, when it is determined in S204 that the moving speed of the vehicle in which the terminal is located exceeds the first threshold, or when it is determined in S207 that the moving speed exceeds the first threshold, the efficiency of the network selection policy may also be low, resulting in a phenomenon of network drop or service interruption.
In this embodiment, the terminal implements optimization of the terminal network selection policy by executing S216 to S217, as shown in fig. 5, if the moving rate exceeds the first threshold, the terminal executes S216:
s216: and determining each cell network in which the terminal is positioned.
S217: in each cell network, the network selection parameters of the terminal are adjusted, so that the terminal selects a target network for communication based on the adjusted network selection parameters, the distance between a base station of the target network and the terminal is minimum, and the distance is reduced along with the movement of the terminal, that is, the moving direction of the terminal is towards the base station of the target network.
The parameters of the terminal network selection may be weight parameters or hysteresis parameters of communication parameters such as signal strength, etc., and the network selection policy is changed by configuring the adjusted weight parameters or hysteresis parameters, so as to frequently perform network reselection, so as to determine that the communication network of the base station closest to the terminal and toward which the moving direction of the terminal is oriented is the target network.
As shown in fig. 6, A, B, C, D four cell networks are around the terminal, and the moving direction of the terminal is as shown, thereby determining cell network C as the target network, and the terminal performs data communication through the nearest and closer cell networks, thereby improving the communication performance.
In the above schemes for improving communication quality: s208 to S211, S212 to S215, and S216 to S217 may be performed simultaneously, or one or two schemes may be selected according to the current requirement of the terminal, such as the remaining amount of power or the current state of the terminal, to improve the communication quality. For example, the schemes of S208 to S211 and S212 to S215 may be applied to terminals in a communication connection state, such as terminals performing voice communication or short message transmission; and S216 to S217 may be applied to a terminal which does not perform any data transmission.
Fig. 7 is a schematic structural diagram of the terminal in fig. 1, and the terminal in fig. 7 may include the following structures:
a bus 701 for connecting the respective components in the terminal.
A communication interface 702 and an antenna 703, and the antenna 703 is connected to the bus 701 through the communication interface 702.
The modem 704 is connected to the bus 701.
The memory 705 is connected to the bus 701 and stores an application program and data generated by the application program.
A processor 706 configured to execute an application program to determine a moving speed of the terminal and determine a calibration coefficient of a communication parameter of the terminal according to the moving speed, so that the communication parameter of the terminal is adjusted accordingly based on the determined calibration coefficient, and then the modem 704 uses the adjusted communication parameter to perform communication through the antenna 703.
Fig. 7 shows an implementation structure of a terminal, and the implementation functions of the structures in the terminal can be implemented by referring to the foregoing description, which is not described in detail here.
The embodiments are described in a progressive manner, each embodiment focuses on differences from other embodiments, and the same or similar parts among the embodiments are referred to each other.
Claims (8)
1. A communication method, applied to a terminal, the method comprising:
the terminal determines the moving speed of the terminal;
determining a calibration coefficient of a communication parameter of the terminal according to the moving rate, wherein the communication parameter comprises at least one of a channel carrier signal frequency, a channel estimation value or a network selection parameter; wherein, the parameters of the network selection are weight parameters or hysteresis parameters of signal intensity;
and communicating according to the communication parameters calibrated by the calibration coefficients.
2. The method of claim 1, wherein determining the calibration coefficient of the communication parameter of the terminal according to the moving rate comprises:
if the moving speed of the terminal is greater than or equal to a first threshold value, calibrating the frequency of a channel carrier signal received by the terminal by using a preset first calibration coefficient;
if the moving speed of the terminal is smaller than the first threshold and is larger than or equal to a second threshold, calibrating the frequency of the channel carrier signal received by the terminal by using a preset second calibration coefficient;
if the moving speed of the terminal is less than the second threshold value, calibrating the frequency of the channel carrier signal received by the terminal by using a preset third calibration coefficient,
wherein the first threshold is greater than the second threshold.
3. The method of claim 1, wherein determining the calibration coefficient of the communication parameter of the terminal according to the moving rate comprises:
if the moving speed of the terminal is greater than or equal to a first threshold value, calibrating the channel estimation value of the terminal by using a preset first interpolation factor set;
if the moving speed of the terminal is smaller than the first threshold and is larger than or equal to a second threshold, calibrating the channel estimation value of the terminal by using a preset second interpolation factor set;
if the moving speed of the terminal is smaller than the second threshold value, calibrating the channel estimation value of the terminal by using a preset third interpolation factor set;
wherein the first threshold is greater than the second threshold.
4. The method of claim 1, wherein after determining the mobility rate of the terminal, further comprising:
and adjusting the parameters of the terminal network selection based on the moving speed, so that the terminal selects a target network for communication based on the adjusted parameters, the distance between a base station of the target network and the terminal is minimum, and the distance is reduced along with the movement of the terminal.
5. A terminal, comprising a memory and a processor, wherein:
the memory is used for storing the application programs and data generated by the running of the application programs;
the processor is used for executing the application program to realize the following functions: determining the moving rate of the terminal, and determining a calibration coefficient of a communication parameter of the terminal according to the moving rate, wherein the communication parameter comprises at least one of a channel carrier signal frequency, a channel estimation value or a network selection parameter; wherein, the parameters of the network selection are weight parameters or hysteresis parameters of signal intensity;
the processor is further configured to execute the application program to implement the following functions: and communicating according to the communication parameters calibrated by the calibration coefficients.
6. The terminal of claim 5, wherein the processor determines the calibration coefficient of the communication parameter of the terminal according to the moving rate, specifically:
if the moving speed of the terminal is greater than or equal to a preset first threshold value, the processor calibrates the channel carrier signal frequency received by the terminal by using a preset first calibration coefficient;
if the moving speed of the terminal is smaller than the first threshold and is larger than or equal to a preset second threshold, the processor calibrates the frequency of the channel carrier signal received by the terminal by using a preset second calibration coefficient;
if the moving speed of the terminal is less than the second threshold value, the processor calibrates the channel carrier signal frequency received by the terminal by using a preset third calibration coefficient,
wherein the first threshold is greater than the second threshold.
7. The terminal of claim 5, wherein the processor determines the calibration coefficient of the communication parameter of the terminal according to the moving rate, specifically:
if the moving speed of the terminal is greater than or equal to a preset first threshold value, calibrating the channel estimation value of the terminal by using a preset first interpolation factor set;
if the moving speed of the terminal is smaller than the first threshold and is larger than or equal to a preset second threshold, calibrating the channel estimation value of the terminal by using a preset second interpolation factor set;
if the moving speed of the terminal is smaller than the second threshold value, calibrating the channel estimation value of the terminal by using a preset third interpolation factor set;
wherein the first threshold is greater than the second threshold.
8. The terminal of claim 5, wherein the processor, after determining the rate of movement of the terminal, is further configured to:
and adjusting the network selection parameters of the terminal based on the moving speed, so that the terminal selects a target network for communication based on the adjusted parameters, the distance between a base station of the target network and the terminal is minimum, and the distance is reduced along with the movement of the terminal.
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| PCT/CN2016/096930 WO2018035851A1 (en) | 2016-08-26 | 2016-08-26 | Communication method and terminal |
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| CN112995409B (en) * | 2019-12-02 | 2022-03-11 | 荣耀终端有限公司 | Display method of intelligent communication strategy effective scene, mobile terminal and computer readable storage medium |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101686481A (en) * | 2008-09-26 | 2010-03-31 | 鼎桥通信技术有限公司 | Method and device for estimating moving velocity of terminal |
| CN102209332A (en) * | 2010-03-30 | 2011-10-05 | 联芯科技有限公司 | Control strategy configuration method and device based on movement speed of terminal |
| CN102223326A (en) * | 2011-06-21 | 2011-10-19 | 中兴通讯股份有限公司 | Channel estimation method and device based on Doppler frequency shift |
| CN104159260A (en) * | 2014-08-26 | 2014-11-19 | 北京蓝山科技股份有限公司 | Multiple-antenna based mobile communication method for high-speed train |
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| CN100459802C (en) * | 2005-10-26 | 2009-02-04 | 华为技术有限公司 | Method and system for implementing cellular communication system switching |
| KR101459014B1 (en) * | 2008-02-04 | 2014-11-07 | 삼성전자주식회사 | Apparatus and method for frequency control in mobile communication system |
| CN202425053U (en) * | 2011-12-23 | 2012-09-05 | 重庆重邮信科通信技术有限公司 | Mobile terminal service cell reselection parameter computing device and mobile terminal |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101686481A (en) * | 2008-09-26 | 2010-03-31 | 鼎桥通信技术有限公司 | Method and device for estimating moving velocity of terminal |
| CN102209332A (en) * | 2010-03-30 | 2011-10-05 | 联芯科技有限公司 | Control strategy configuration method and device based on movement speed of terminal |
| CN102223326A (en) * | 2011-06-21 | 2011-10-19 | 中兴通讯股份有限公司 | Channel estimation method and device based on Doppler frequency shift |
| CN104159260A (en) * | 2014-08-26 | 2014-11-19 | 北京蓝山科技股份有限公司 | Multiple-antenna based mobile communication method for high-speed train |
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