CN106412985B - Mobile terminal cell switching control method and device - Google Patents
Mobile terminal cell switching control method and device Download PDFInfo
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- CN106412985B CN106412985B CN201510465711.0A CN201510465711A CN106412985B CN 106412985 B CN106412985 B CN 106412985B CN 201510465711 A CN201510465711 A CN 201510465711A CN 106412985 B CN106412985 B CN 106412985B
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W24/00—Supervisory, monitoring or testing arrangements
- H04W24/10—Scheduling measurement reports ; Arrangements for measurement reports
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W36/00—Hand-off or reselection arrangements
- H04W36/24—Reselection being triggered by specific parameters
- H04W36/30—Reselection being triggered by specific parameters by measured or perceived connection quality data
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Abstract
A method and a device for controlling cell switching of a mobile terminal are provided, the method comprises the following steps: when the number of ping-pong switching is detected to be greater than the preset number within the preset duration, the position is used as an initial position; acquiring a current position and a signal intensity value of a current resident cell; comparing the current position to the initial position; and when the distance between the current position and the initial position is smaller than a preset value, limiting cell switching. By adopting the method and the device, the ping-pong switching frequency of the mobile terminal can be effectively reduced.
Description
Technical Field
The present invention relates to the field of wireless communications, and in particular, to a method and an apparatus for controlling cell handover of a mobile terminal.
Background
In a mobile communication system, a group of radio cells adjacent to each other exists around a mobile terminal used by a user. A single mobile terminal can only communicate with one cell at a time. When a mobile terminal moves between two cells, in order to ensure the continuity and the service quality of communication, the system transfers the communication link between the mobile terminal and the original cell to a new cell, and the process is called 'handover'.
When a mobile terminal is in an overlapping area between two cells and the signal strengths of the two cells differ less, the mobile terminal may switch back and forth between the two cells, referred to as a "ping-pong handover". The mobile terminal sends a switching command by adopting stealing frames when switching between cells, and if the mobile terminal performs ping-pong switching between two cells, the ping-pong switching generates continuous stealing frames.
Ping-pong handover results in the loss of the received paging indication signal when the mobile terminal is in idle mode. When the mobile terminal is in voice service transmission, the voice quality is not clear, and a discontinuous condition occurs. When the mobile terminal is in a data transmission service, the data transmission rate may be reduced, and even the data transmission terminal may be present.
Disclosure of Invention
The embodiment of the invention solves the problem of reducing ping-pong switching.
In order to solve the above problem, an embodiment of the present invention provides a method for controlling cell handover of a mobile terminal, including:
when the number of ping-pong switching is detected to be greater than the preset number within the preset duration, the position is used as an initial position;
acquiring a current position and a signal intensity value of a current resident cell;
comparing the current position to the initial position;
and when the distance between the current position and the initial position is smaller than a preset value, limiting cell switching.
Optionally, the method for controlling cell handover of a mobile terminal includes: and when the distance between the current position and the initial position is smaller than a preset value and the signal intensity change value of the candidate cell is within a preset range, punishing the candidate cell to limit cell switching.
Optionally, the penalizing the candidate cell includes: and summing the signal intensity value of the current resident cell with a preset penalty factor to obtain a summation result.
Optionally, after obtaining the summation result, the method further includes: and reporting the summation result to a radio resource control layer and a network side of the mobile terminal, so that the radio resource control layer or the network side judges whether to send a cell switching instruction according to the summation result.
Optionally, the determining, by the radio resource control layer and the network side according to the summation result, whether to send the cell switching instruction includes:
the radio resource control layer or the network side judges whether the summation result is smaller than a signal strength threshold value;
and when the summation result is smaller than the signal strength threshold value, the wireless resource control layer or the network side sends a cell switching instruction.
Optionally, the performing the cell handover operation includes:
when the mobile terminal is in an idle mode, receiving a cell switching instruction sent by the radio resource control layer, and executing cell switching operation;
and when the mobile terminal is in the connection mode, receiving a cell switching instruction sent by the network side, and executing cell switching operation.
Optionally, when the distance increases, the corresponding penalty factor decreases; and when the distance is greater than or equal to the preset value, the penalty factor is equal to 0.
The embodiment of the invention also provides a mobile terminal cell switching control device, which comprises:
the position acquisition unit is used for acquiring the position as an initial position when the number of ping-pong switching is detected to be greater than the preset number within the preset duration; and for obtaining a current location;
the device comprises an acquisition unit, a judging unit and a control unit, wherein the acquisition unit is used for acquiring the signal intensity value of the current resident cell;
a comparison unit for comparing the current position with the initial position;
and the control unit is used for limiting cell switching when the distance between the current position and the initial position is smaller than a preset value.
Optionally, the control unit is configured to: and when the distance between the current position and the initial position is smaller than a preset value and the signal intensity change value of the candidate cell is within a preset range, punishing the candidate cell to limit cell switching.
Optionally, the control unit is configured to sum the signal strength value of the current residential cell with a preset penalty factor, and obtain a sum result.
Optionally, the mobile terminal cell switching apparatus further includes: and the reporting unit is used for reporting the summation result to a radio resource control layer and a network side of the mobile terminal.
Optionally, the control unit is configured to: when the mobile terminal is in an idle mode, receiving a cell switching instruction sent by the radio resource control layer, and executing cell switching operation; and when the mobile terminal is in the connection mode, receiving a cell switching instruction sent by the network side, and executing cell switching operation.
Optionally, when the distance increases, the corresponding penalty factor decreases; and when the distance is greater than or equal to the preset value, the penalty factor is equal to 0.
Compared with the prior art, the technical scheme of the embodiment of the invention has the following advantages:
when detecting that the ping-pong switching has occurred to the mobile terminal, acquiring the current position and comparing the current position with the initial position, and when the distance between the current position and the initial position is less than a preset value, limiting the cell switching, thereby effectively reducing the probability of ping-pong switching.
Drawings
Fig. 1 is a flowchart of a method for controlling cell handover of a mobile terminal according to an embodiment of the present invention;
fig. 2 is a cell coverage scenario diagram of a ping-pong handover occurring at a mobile terminal;
fig. 3 is a schematic structural diagram of a mobile terminal cell switching control device in an embodiment of the present invention.
Detailed Description
In the prior art, when a mobile terminal is in an idle mode, ping-pong handover causes loss of a received paging indication signal. When the mobile terminal is in voice service transmission, the voice quality is not clear, and a discontinuous condition occurs. When the mobile terminal is in a data transmission service, the data transmission rate may be reduced, and even the data transmission terminal may be present.
In the embodiment of the invention, when the ping-pong handover of the mobile terminal is detected, the current position is acquired and compared with the initial position, and when the distance between the current position and the initial position is smaller than the preset value, the cell handover is limited, so that the probability of the ping-pong handover can be effectively reduced.
In order to make the aforementioned objects, features and advantages of the embodiments of the present invention comprehensible, specific embodiments accompanied with figures are described in detail below.
Referring to fig. 1, an embodiment of the present invention provides a method for controlling cell handover of a mobile terminal, which is described in detail below through specific steps.
Step S101, when the number of ping-pong switching is detected to be greater than the preset number within the preset time, the position of the mobile terminal is obtained as an initial position.
In specific implementation, the value range of the preset duration and the preset times of ping-pong switching can be set according to the actual application scene. For example, setting the preset duration to be 2s, setting the preset number of times to be 3 times, and when it is detected that the number of times of ping-pong handover of the mobile terminal is greater than 3 times in 2s, acquiring the position where the mobile terminal is located at the moment, and taking the position acquired at the moment as an initial position.
In specific implementation, the current location information of the mobile terminal may be obtained through a Global Positioning System (GPS) chip pre-installed in the mobile terminal, or the current location information of the mobile terminal may be obtained through a BeiDou Navigation Satellite System (BDS) chip pre-installed in the mobile terminal, or the current location information of the mobile terminal may be obtained through other Positioning systems, which is not described herein in detail.
In the embodiment of the present invention, the current location information of the mobile terminal may include longitude information and latitude information of a specific location where the mobile terminal is currently located, and may further include a floor number of a building where the mobile terminal is currently located. For example, the current location information of the mobile terminal is 121 ° 27 '32.00 "east longitude, 31 ° 16' 46.78" north latitude, and XX mansion 5 th building.
In general, a satellite positioning chip, such as a BDS chip, in a mobile terminal is independent of a communication processor chip that enables access to a wireless communication network. The current position information of the mobile terminal can be obtained through the satellite positioning chip even if the mobile terminal is not accessed to the wireless communication network.
Step S102, obtaining the current position and the signal intensity value of the current resident cell.
In a specific implementation, the current location of the mobile terminal may be obtained in real time through a GPS chip or a BDS chip, and after the current location of the mobile terminal is obtained, step S103 is executed.
In practical applications, the Signal Strength value of the current cell acquired by the mobile terminal may be a Received Signal Strength Indication (RSSI), a Reference Signal Receiving Power (RSRP), or a Received Signal Code Power (RSCP).
Step S103, comparing the current position with the initial position, and judging whether the distance S between the current position and the initial position is smaller than a preset value.
In a specific implementation, when the distance S between the current position and the initial position is smaller than a preset value, step S104 may be executed; when the distance S between the current position and the initial position is greater than or equal to a preset value, the operation flow may be ended.
In specific implementation, the preset value can be set according to the actual application scene. For example, when the preset value is set to 10 m, i.e. the distance between the current position and the initial position is less than 10 m,
for example, at time t0, when it is detected that the mobile terminal has undergone 3 ping-pong handovers within 2s, the position L0 of the mobile terminal at time t0 is obtained as the initial position. At time t1, the user moves the handheld mobile terminal to position L1, that is, the current position is L1, and obtains the distance S between the current position L1 and the initial position L0, where the preset value is 20 meters. And when the S is less than 20 meters, executing the step S104.
And step S104, limiting the cell switching.
In specific implementation, when the distance between the current position and the initial position of the mobile terminal is smaller than a preset value, cell switching can be limited, so that the mobile terminal can be prevented from continuously performing ping-pong switching.
In the embodiment of the present invention, when the distance between the current position and the initial position of the mobile terminal is smaller than a preset value, it may be determined whether a signal strength variation value of a current candidate cell of the mobile terminal is within a preset range, where the current candidate cell is a cell to which the mobile terminal may be handed over. And when the signal intensity change value of the candidate cell is within a preset range, punishing the candidate cell to limit cell switching. Penalizing the candidate cell may include: and summing the signal intensity value of the current resident cell of the mobile terminal with a preset penalty factor, and reporting the summation result after the summation result is obtained.
In the embodiment of the present invention, reporting the obtained summation result refers to reporting the summation result to a Radio Resource Control (RRC) layer and a network side of the mobile terminal. And after receiving the reported summation result, the radio resource control layer and the network side compare the summation result with a preset signal strength threshold value. When the summation result is smaller than the signal intensity threshold value, a network side or RRC sends a cell switching instruction according to the current working mode of the mobile terminal; and when the summation result is greater than or equal to the signal strength threshold value, the mobile terminal still resides in the current cell.
That is to say, in the embodiment of the present invention, the signal strength values reported to the RRC and the network side are: the sum of the signal strength value obtained by actual measurement and a preset penalty factor, namely the signal strength value reported to the RRC and the network side is greater than the signal strength value obtained by actual measurement. At this time, the probability of cell handover occurring becomes small, and thus cell handover of the mobile terminal is restricted.
In a specific implementation, the penalty factor may be related to a distance S between the current position and the initial position, and a corresponding relationship between the penalty factor and the distance S may be preset and stored in the mobile terminal in the form of a mapping table. And when the distance S between the current position and the initial position is smaller than a preset value, acquiring a penalty factor corresponding to the distance from the mapping table.
In the embodiment of the present invention, the relationship between the penalty factor and the distance may be: the smaller the distance S between the current position and the initial position, the larger the corresponding penalty factor. Conversely, the greater the distance S between the current position and the initial position, the smaller the corresponding penalty factor. And when the distance S between the current position and the initial position is greater than or equal to a preset value, the corresponding penalty factor is 0.
Step S105, when receiving the cell switching instruction, executing the cell switching operation.
In the embodiment of the present invention, when the mobile terminal is in an IDLE (IDLE) mode, the cell switching instruction sent by the RRC may be received, and the cell switching operation may be performed. When the mobile terminal is in the connection mode, the mobile terminal can receive a cell switching instruction sent by the network side and execute cell switching operation.
In practical applications, when a mobile terminal is in an overlapping area of two or more cells, it is possible to switch back and forth between the two or more cells to perform a cell reselection operation. Referring to fig. 2, there is an overlapping area between cell 1, cell 2, and cell 3, as shown by the shaded portion in fig. 2. When the mobile terminal is in the shaded area, the currently covered cells may be at least two of cell 1, cell 2, and cell 3. When the mobile terminal moves within the shadow area, it is possible to switch back and forth between cell 1, cell 2, cell 3.
In the prior art, a mobile terminal obtains a signal strength value, such as RSSI, of a current cell, and reports the RSSI to an RRC and a network side. And the RRC or the network side compares the RSSI with a preset signal strength threshold value according to the current working mode of the mobile terminal. And when the RSSI is smaller than the signal strength threshold value, the RRC or the network side sends a cell switching instruction to the mobile terminal. And when receiving the cell switching instruction, the mobile terminal executes the cell switching operation.
In the embodiment of the invention, when the ping-pong handover of the mobile terminal is detected, the current position is acquired and compared with the initial position, and when the distance between the current position and the initial position is smaller than the preset value, the cell handover is limited, so that the probability of the ping-pong handover can be effectively reduced.
Referring to fig. 3, an embodiment of the present invention further provides a mobile terminal cell switching control apparatus 30, including: a position acquisition unit 301, an acquisition unit 302, a comparison unit 303, and a control unit 304, wherein:
a position obtaining unit 301, configured to obtain a position where ping-pong handover occurs as an initial position when it is detected that the number of ping-pong handover occurring within a preset time period is greater than a preset number of times; and for obtaining a current location;
an obtaining unit 302, configured to obtain a signal strength value of a current camped cell;
a comparing unit 303, configured to compare the current position with the initial position;
a control unit 304, configured to limit cell handover when a distance between the current position and the initial position is smaller than a preset value.
In a specific implementation, the control unit 304 is configured to: and when the distance between the current position and the initial position is smaller than a preset value and the signal intensity change value of the candidate cell is within a preset range, punishing the candidate cell to limit cell switching.
In a specific implementation, the control unit 304 is configured to sum the signal strength value of the current camping cell with a preset penalty factor, so as to obtain a sum result.
In a specific implementation, the apparatus for controlling cell handover of a mobile terminal may further include: the reporting unit 305 may be configured to report the summation result to a radio resource control layer and a network side of the mobile terminal.
In a specific implementation, the control unit 304 may be configured to: when the mobile terminal is in an idle mode, receiving a cell switching instruction sent by the radio resource control layer, and executing cell switching operation; and when the mobile terminal is in the connection mode, receiving a cell switching instruction sent by the network side, and executing cell switching operation.
In a particular implementation, as the distance increases, the corresponding penalty factor decreases; and when the distance is greater than or equal to the preset value, the penalty factor is equal to 0.
Those skilled in the art will appreciate that all or part of the steps in the methods of the above embodiments may be implemented by associated hardware instructed by a program, which may be stored in a computer-readable storage medium, and the storage medium may include: ROM, RAM, magnetic or optical disks, and the like.
Although the present invention is disclosed above, the present invention is not limited thereto. Various changes and modifications may be effected therein by one skilled in the art without departing from the spirit and scope of the invention as defined in the appended claims.
Claims (4)
1. A method for controlling cell switching of a mobile terminal is characterized by comprising the following steps:
when the number of ping-pong switching is detected to be greater than the preset number within the preset duration, the position is used as an initial position;
acquiring a current position and a signal intensity value of a current resident cell;
comparing the current position to the initial position;
when the distance between the current position and the initial position is smaller than a preset value and the signal intensity change value of a candidate cell is within a preset range, punishing the candidate cell to limit cell switching; the punishment of the candidate cell comprises: summing the signal intensity value of the current resident cell with a preset penalty factor to obtain a summation result; as the distance increases, the corresponding penalty factor decreases; when the distance is greater than or equal to the preset value, the penalty factor is equal to 0;
after obtaining a summation result, reporting the summation result to a wireless resource control layer and a network side of the mobile terminal; enabling the radio resource control layer or the network side to judge whether the summation result is smaller than a signal strength threshold value; and when the summation result is smaller than the signal strength threshold value, the wireless resource control layer or the network side sends a cell switching instruction to execute cell switching operation.
2. The mobile terminal cell switching control method of claim 1, wherein said performing a cell switching operation comprises:
when the mobile terminal is in an idle mode, receiving a cell switching instruction sent by the radio resource control layer, and executing cell switching operation;
and when the mobile terminal is in the connection mode, receiving a cell switching instruction sent by the network side, and executing cell switching operation.
3. A mobile terminal cell switching control apparatus, comprising:
the position acquisition unit is used for acquiring the position as an initial position when the number of ping-pong switching is detected to be greater than the preset number within the preset duration; and for obtaining a current location;
the device comprises an acquisition unit, a judging unit and a control unit, wherein the acquisition unit is used for acquiring the signal intensity value of the current resident cell;
a comparison unit for comparing the current position with the initial position;
the control unit is used for punishing the candidate cell to limit cell switching when the distance between the current position and the initial position is smaller than a preset value and the signal intensity change value of the candidate cell is within a preset range; the punishment of the candidate cell comprises: summing the signal intensity value of the current resident cell with a preset penalty factor to obtain a summation result; as the distance increases, the corresponding penalty factor decreases; when the distance is greater than or equal to the preset value, the penalty factor is equal to 0;
a reporting unit, configured to report the summation result to a radio resource control layer and a network side of the mobile terminal, so that the radio resource control layer or the network side determines whether the summation result is smaller than a signal strength threshold; and when the summation result is smaller than the signal strength threshold value, the wireless resource control layer or the network side sends a cell switching instruction to execute cell switching operation.
4. The mobile terminal cell handover control apparatus of claim 3, wherein the control unit is configured to: when the mobile terminal is in an idle mode, receiving a cell switching instruction sent by the radio resource control layer, and executing cell switching operation; and when the mobile terminal is in the connection mode, receiving a cell switching instruction sent by the network side, and executing cell switching operation.
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CN109842909B (en) * | 2017-11-27 | 2020-10-02 | 大唐移动通信设备有限公司 | Processing method and device for preventing ping-pong handover |
WO2020006655A1 (en) * | 2018-07-02 | 2020-01-09 | 华为技术有限公司 | Interoperation management method, apparatus, and storage medium |
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CN111132246A (en) * | 2018-11-01 | 2020-05-08 | 中国电信股份有限公司 | Handover method, system, and computer-readable storage medium |
CN110650509A (en) * | 2019-09-12 | 2020-01-03 | 维沃移动通信有限公司 | State processing method of electronic equipment and electronic equipment |
CN110582103A (en) * | 2019-09-24 | 2019-12-17 | 广东以诺通讯有限公司 | method, terminal and storage medium for avoiding network ping-pong switching |
CN112654072B (en) * | 2019-10-11 | 2022-06-24 | 维沃移动通信有限公司 | Cell residence method, equipment and system |
CN114040460A (en) * | 2021-11-23 | 2022-02-11 | 新华三技术有限公司成都分公司 | Ping-pong switching suppression method and device |
CN114928866A (en) * | 2022-05-31 | 2022-08-19 | 展讯半导体(成都)有限公司 | Cell switching control method and communication device |
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