CN109640361B - Cell reselection method, device and computer readable storage medium - Google Patents
Cell reselection method, device and computer readable storage medium Download PDFInfo
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- CN109640361B CN109640361B CN201710928876.6A CN201710928876A CN109640361B CN 109640361 B CN109640361 B CN 109640361B CN 201710928876 A CN201710928876 A CN 201710928876A CN 109640361 B CN109640361 B CN 109640361B
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W36/00—Hand-off or reselection arrangements
- H04W36/0005—Control or signalling for completing the hand-off
- H04W36/0083—Determination of parameters used for hand-off, e.g. generation or modification of neighbour cell lists
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W36/00—Hand-off or reselection arrangements
- H04W36/24—Reselection being triggered by specific parameters
- H04W36/26—Reselection being triggered by specific parameters by agreed or negotiated communication parameters
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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
- H04W4/025—Services making use of location information using location based information parameters
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Abstract
The embodiment of the invention provides a cell reselection method, a device and a computer readable storage medium, wherein the method comprises the following steps: determining state information of a terminal; the state information is used for indicating the current motion state of the terminal; when the running state is determined to be the moving state, adopting reselection parameters broadcasted by a network side; and when the running state is determined to be a static state, correcting reselection parameters broadcasted by the network side.
Description
Technical Field
The present invention relates to the field of mobile communications technologies, and in particular, to a cell reselection method, apparatus, and computer-readable storage medium.
Background
In the existing cell reselection process, a cell broadcasts a set of cell reselection parameters, and all terminals reselect according to the uniform cell reselection parameters. Such as: a reselection start measurement threshold (starting measurement of a neighboring cell when the serving cell signal is lower than the value), and a reselection delay time (when the neighboring cell signal is higher than the signal of the current cell for a period of time, the terminal reselects to a target cell).
For the cellular internet of things NB-IOT system, in the specification of 3GPP R13 release, the maximum value of the cell reselection start threshold is-70 dBm. However, since the NB-IOT is often deployed in a low frequency band (e.g., 900MHz), the start-up threshold may cause a terminal in a mobile state, and a problem of reselection hysteresis often occurs outdoors.
To improve this problem, in 3GPP R14, the maximum value of the start-up threshold is adjusted to-52 dBm. In the network, when the reselection start threshold is set to-52 dBm, the problem of reselection hysteresis of the terminal in the mobile state in an outdoor low-frequency network can be better solved. However, for many stationary terminals (e.g., terminals for meter reading and other services), such terminals do not move and are located indoors with relatively poor signal coverage, and once an indoor signal is weaker than-52 dBm, the terminals frequently start measurement on neighboring cells, thereby greatly increasing the power consumption of the terminals.
Disclosure of Invention
In view of the above, embodiments of the present invention are directed to a cell reselection method, apparatus, and computer-readable storage medium.
In order to achieve the above purpose, the technical solution of the embodiment of the present invention is realized as follows:
the embodiment of the invention provides a cell reselection method, which comprises the following steps:
determining state information of a terminal; the state information is used for indicating the current motion state of the terminal;
when the running state is determined to be the moving state, adopting reselection parameters broadcasted by a network side; and when the running state is determined to be a static state, correcting reselection parameters broadcasted by the network side.
Optionally, the determining the state information of the terminal includes:
determining the state information of the terminal based on the mobility attribute preset by the terminal;
the current operation state of the terminal indicated by the state information of the terminal is the same as the operation state of the terminal indicated by the preset mobility attribute.
Optionally, the determining the state information of the terminal includes:
determining state information of the terminal based on the times of cell reselection occurring within preset time;
when the number of times of cell reselection is larger than or equal to a preset threshold, determining that the terminal is in a moving state; otherwise, determining that the terminal is in a static state.
Optionally, the determining the state information of the terminal includes:
the state information of the terminal is determined based on a fluctuation of Reference Signal Received Power (RSRP) or signal to interference plus noise ratio (SINR) within a preset time.
The determining the state information of the terminal based on the fluctuation of the RSRP or the SINR in the preset time includes:
if the average value or variance of the RSRP or SINR fluctuation in the preset time is smaller than the preset value, determining that the terminal is in a static state;
and if the average value or the variance of the RSRP or the SINR fluctuation in the preset time is more than or equal to the preset value, determining that the terminal is in a moving state.
Optionally, the determining the state information of the terminal includes:
determining state information of the terminal based on a variation of Global Positioning System (GPS) information of the terminal.
Wherein, the determining the state information of the terminal based on the change situation of the GPS information of the terminal comprises:
if the GPS of the terminal is in an on state and the variation range of the GPS positioning data in the preset time is smaller than a preset value, determining that the terminal is in a static state;
and if the GPS of the terminal is in the starting state and the variation range of the GPS positioning data within the preset time is larger than or equal to the preset value, determining that the terminal is in the moving state.
An embodiment of the present invention further provides a cell reselection apparatus, where the apparatus includes:
the determining module is used for determining the state information of the terminal; the state information is used for indicating the current motion state of the terminal;
the processing module is used for adopting reselection parameters broadcasted by a network side when the running state is determined to be the mobile state; and when the running state is determined to be a static state, correcting reselection parameters broadcasted by the network side.
An embodiment of the present invention further provides a cell reselection apparatus, including: a processor and a memory for storing a computer program capable of running on the processor,
wherein the processor is configured to perform the steps of the above method when running the computer program.
Embodiments of the present invention also provide a computer-readable storage medium, on which a computer program is stored, which, when executed by a processor, implements the steps of the above-mentioned method.
The cell reselection method, the cell reselection device and the computer readable storage medium provided by the embodiment of the invention determine the state information of the terminal; the state information is used for indicating the current motion state of the terminal; when the running state is determined to be the moving state, adopting reselection parameters broadcasted by a network side; and when the running state is determined to be a static state, correcting reselection parameters broadcasted by the network side. Therefore, in the embodiment of the invention, if the terminal is in the mobile state, the reselection parameter broadcasted by the network side is adopted, so that the problem of terminal reselection hysteresis in the mobile state can be solved; if the terminal is in a static state, the reselection parameters broadcasted by the network side are corrected, so that the problem of power consumption increase caused by frequent starting of reselection measurement by the terminal in the static state can be solved.
Drawings
Fig. 1 is a schematic flow chart of a cell reselection method according to an embodiment of the present invention;
fig. 2 is a schematic structural diagram of a cell reselection apparatus according to an embodiment of the present invention.
Detailed Description
The invention is described below with reference to the figures and examples.
An embodiment of the present invention provides a cell reselection method, as shown in fig. 1, the method includes:
step 101: determining state information of a terminal; the state information is used for indicating the current motion state of the terminal;
step 102: when the running state is determined to be the moving state, adopting reselection parameters broadcasted by a network side; and when the running state is determined to be a static state, correcting reselection parameters broadcasted by the network side.
In the embodiment of the invention, if the terminal is in a mobile state, the reselection parameter broadcasted by the network side is adopted, so that the problem of terminal reselection hysteresis in the mobile state can be solved; if the terminal is in a static state, the reselection parameters broadcasted by the network side are corrected, so that the problem of power consumption increase caused by frequent starting of reselection measurement by the terminal in the static state can be solved.
In one embodiment, the determining the state information of the terminal includes:
determining the state information of the terminal based on the mobility attribute preset by the terminal;
the current operation state of the terminal indicated by the state information of the terminal is the same as the operation state of the terminal indicated by the preset mobility attribute.
The mobility attributes of the terminals employed for each industry are fixed. Such as: the terminals of the meter reading service are all static terminals; and the logistics tracking terminal is mainly a mobile terminal.
In one embodiment, the determining the state information of the terminal includes:
determining state information of the terminal based on the times of cell reselection occurring within preset time;
when the number of times of cell reselection is larger than or equal to a preset threshold, determining that the terminal is in a moving state; otherwise, determining that the terminal is in a static state.
In one embodiment, the determining the state information of the terminal includes:
the state information of the terminal is determined based on a fluctuation of Reference Signal Received Power (RSRP) or signal to interference plus noise ratio (SINR) within a preset time.
The determining the state information of the terminal based on the fluctuation of the RSRP or the SINR in the preset time includes:
if the average value or variance of the RSRP or SINR fluctuation in the preset time is smaller than the preset value, determining that the terminal is in a static state;
and if the average value or the variance of the RSRP or the SINR fluctuation in the preset time is more than or equal to the preset value, determining that the terminal is in a moving state.
In one embodiment, the determining the state information of the terminal includes:
determining state information of the terminal based on a variation of Global Positioning System (GPS) information of the terminal.
Wherein, the determining the state information of the terminal based on the change situation of the GPS information of the terminal comprises:
if the GPS of the terminal is in an on state and the variation range of the GPS positioning data in the preset time is smaller than a preset value, determining that the terminal is in a static state;
and if the GPS of the terminal is in the starting state and the variation range of the GPS positioning data within the preset time is larger than or equal to the preset value, determining that the terminal is in the moving state.
An embodiment of the present invention further provides a cell reselection apparatus, as shown in fig. 2, the apparatus includes:
a determining module 201, configured to determine state information of a terminal; the state information is used for indicating the current motion state of the terminal;
a processing module 202, configured to determine that the operating state is a mobile state, and use reselection parameters broadcasted by a network side; and when the running state is determined to be a static state, correcting reselection parameters broadcasted by the network side.
In the embodiment of the invention, if the terminal is in a mobile state, the reselection parameter broadcasted by the network side is adopted, so that the problem of terminal reselection hysteresis in the mobile state can be solved; if the terminal is in a static state, the reselection parameters broadcasted by the network side are corrected, so that the problem of power consumption increase caused by frequent starting of reselection measurement by the terminal in the static state can be solved.
In one embodiment, the determining module 201 comprises:
a first determining unit, configured to determine state information of the terminal based on a mobility attribute preset by the terminal;
the current operation state of the terminal indicated by the state information of the terminal is the same as the operation state of the terminal indicated by the preset mobility attribute.
In one embodiment, the determining module 201 comprises:
a second determining unit, configured to determine state information of the terminal based on the number of times of cell reselection occurring within a preset time;
when the number of times of cell reselection is larger than or equal to a preset threshold, determining that the terminal is in a moving state; otherwise, determining that the terminal is in a static state.
In one embodiment, the determining module 201 comprises:
and the third determining unit is used for determining the state information of the terminal based on the fluctuation of the RSRP or the SINR in the preset time.
The third determining unit determines the state information of the terminal based on the RSRP or SINR fluctuation within the preset time, including:
when the mean value or the variance of the RSRP or the SINR fluctuation in the preset time is smaller than the preset value, the terminal is determined to be in a static state;
and when the mean value or the variance of the RSRP or the SINR fluctuation in the preset time is determined to be larger than or equal to the preset value, determining that the terminal is in a moving state.
In one embodiment, the determining module 201 comprises:
and the fourth determination unit is used for determining the state information of the terminal based on the change situation of the GPS information of the terminal.
Wherein the fourth determining unit determines the state information of the terminal based on the change situation of the GPS information of the terminal, and includes:
determining that a GPS of the terminal is in an on state, and determining that the terminal is in a static state when the variation range of GPS positioning data in preset time is smaller than a preset value;
and determining that the GPS of the terminal is in an on state, and determining that the terminal is in a moving state when the variation range of the GPS positioning data in the preset time is larger than or equal to a preset value.
An embodiment of the present invention further provides a cell reselection apparatus, including: a processor and a memory for storing a computer program capable of running on the processor,
wherein the processor is configured to execute, when running the computer program:
determining state information of a terminal; the state information is used for indicating the current motion state of the terminal;
when the running state is determined to be the moving state, adopting reselection parameters broadcasted by a network side; and when the running state is determined to be a static state, correcting reselection parameters broadcasted by the network side.
The processor is further configured to, when executing the computer program, perform:
determining the state information of the terminal based on the mobility attribute preset by the terminal;
the current operation state of the terminal indicated by the state information of the terminal is the same as the operation state of the terminal indicated by the preset mobility attribute.
The processor is further configured to, when executing the computer program, perform:
determining state information of the terminal based on the times of cell reselection occurring within preset time;
when the number of times of cell reselection is larger than or equal to a preset threshold, determining that the terminal is in a moving state; otherwise, determining that the terminal is in a static state.
The processor is further configured to, when executing the computer program, perform:
and determining the state information of the terminal based on the fluctuation of the RSRP or the SINR in the preset time.
When the state information of the terminal is determined based on the volatility of RSRP or SINR within the preset time, the processor is further configured to execute, when the computer program is run, the following steps:
if the average value or variance of the RSRP or SINR fluctuation in the preset time is smaller than the preset value, determining that the terminal is in a static state;
and if the average value or the variance of the RSRP or the SINR fluctuation in the preset time is more than or equal to the preset value, determining that the terminal is in a moving state.
The processor is further configured to, when executing the computer program, perform:
and determining the state information of the terminal based on the change situation of the GPS information of the terminal.
When the state information of the terminal is determined based on the change situation of the GPS information of the terminal, the processor is further used for executing the following steps when the computer program is run:
if the GPS of the terminal is in an on state and the variation range of the GPS positioning data in the preset time is smaller than a preset value, determining that the terminal is in a static state;
and if the GPS of the terminal is in the starting state and the variation range of the GPS positioning data within the preset time is larger than or equal to the preset value, determining that the terminal is in the moving state.
It should be noted that: the apparatus provided in the foregoing embodiment is only illustrated by dividing the program modules when performing cell reselection, and in practical applications, the processing allocation may be completed by different program modules according to needs, that is, the internal structure of the device is divided into different program modules, so as to complete all or part of the processing described above. In addition, the apparatus provided in the above embodiments and the corresponding method embodiments belong to the same concept, and specific implementation processes thereof are described in the method embodiments and are not described herein again.
In an exemplary embodiment, the embodiment of the present invention also provides a computer-readable storage medium, which may be a Memory such as FRAM, ROM, PROM, EPROM, EEPROM, Flash Memory, magnetic surface Memory, optical disc, or CD-ROM; or may be a variety of devices including one or any combination of the above memories, such as a mobile phone, computer, tablet device, personal digital assistant, etc.
An embodiment of the present invention further provides a computer-readable storage medium, on which a computer program is stored, where the computer program, when executed by a processor, performs:
determining state information of a terminal; the state information is used for indicating the current motion state of the terminal;
when the running state is determined to be the moving state, adopting reselection parameters broadcasted by a network side; and when the running state is determined to be a static state, correcting reselection parameters broadcasted by the network side.
The computer program, when executed by the processor, further performs:
determining the state information of the terminal based on the mobility attribute preset by the terminal;
the current operation state of the terminal indicated by the state information of the terminal is the same as the operation state of the terminal indicated by the preset mobility attribute.
The computer program, when executed by the processor, further performs:
determining state information of the terminal based on the times of cell reselection occurring within preset time;
when the number of times of cell reselection is larger than or equal to a preset threshold, determining that the terminal is in a moving state; otherwise, determining that the terminal is in a static state.
The computer program, when executed by the processor, further performs:
and determining the state information of the terminal based on the fluctuation of the RSRP or the SINR in the preset time.
When the state information of the terminal is determined based on the volatility of the RSRP or the SINR within the preset time, when the computer program is executed by the processor, the method further performs:
if the average value or variance of the RSRP or SINR fluctuation in the preset time is smaller than the preset value, determining that the terminal is in a static state;
and if the average value or the variance of the RSRP or the SINR fluctuation in the preset time is more than or equal to the preset value, determining that the terminal is in a moving state.
The computer program, when executed by the processor, further performs:
and determining the state information of the terminal based on the change situation of the GPS information of the terminal.
When the state information of the terminal is determined based on the change situation of the GPS information of the terminal, the computer program is executed by a processor, and the method further comprises the following steps:
if the GPS of the terminal is in an on state and the variation range of the GPS positioning data in the preset time is smaller than a preset value, determining that the terminal is in a static state;
and if the GPS of the terminal is in the starting state and the variation range of the GPS positioning data within the preset time is larger than or equal to the preset value, determining that the terminal is in the moving state.
The invention is described below in conjunction with the scenario embodiments.
In this embodiment, the terminal may determine the motion state of the terminal based on the moving speed of the terminal or the terminal capability information, and when the terminal is in the moving state, the terminal uses the reselection parameters broadcasted by the network side to solve the problem of reselection hysteresis of the mobile terminal; when the terminal is in a static state, the terminal corrects reselection parameters broadcasted by the network side so as to solve the problem of power consumption increase caused by frequent starting of reselection measurement by the static terminal. The embodiment specifically comprises the following steps:
the method comprises the following steps: the network side issues reselection parameters through broadcast messages;
step two: after reading the reselection parameters issued by the network side, the terminal judges the motion state of the terminal, and when the terminal is in a mobile state or belongs to a mobile terminal in type, the terminal reselects the reselection parameters based on network broadcasting;
when the terminal is in a static state or the type of the terminal belongs to a static terminal, the terminal corrects the reselection parameter of the network side according to a certain offset value, wherein the correction mode can be as follows:
starting threshold (terminal) — 18dB starting threshold (network broadcast);
reselection delay time (terminal) — reselection delay time (network broadcast) +2 seconds.
Here, the above-described offset specific values are merely examples.
The motion state of the terminal is judged in the following modes:
the first method is as follows: the terminal is preset to be a static type terminal or a mobile type terminal;
because the internet of things terminal is mostly applied to industry, the terminal is basically bound with the service type one by one. The mobility attributes of the terminals for each industry application are fixed. Such as: the terminals of the meter reading service are all static terminals; and the logistics tracking terminal is mainly a mobile terminal.
The second method comprises the following steps: the terminal judges whether the terminal is in a moving state or not according to the times of cell reselection occurring within a certain time;
such as: assuming that the inter-station distance is 500 meters, the terminal moves at the speed of 20 meters/second, and assuming that the terminal performs cell reselection for one or more times within 25 seconds, the terminal is determined to be in a moving state; otherwise, the terminal is judged to be in a static type or in a static state.
The third method comprises the following steps: judging whether the terminal is in a moving state or not based on the fluctuation of Reference Signal Received Power (RSRP) or signal-to-interference-plus-noise ratio (SINR) within a certain time; if the average value or variance of the RSRP or SINR fluctuation within a certain time is smaller than a certain value (preset value), the terminal is considered to be in a static state; and if the average value or the variance of the RSRP or the SINR fluctuation in a certain time is more than or equal to a certain value, the terminal is considered to be in a moving state.
The method is as follows: judging whether the terminal is in a moving state or not based on the change of the GPS information of the terminal; when the terminal is provided with a GPS and is turned on, if the change range of the GPS positioning data within a certain time is smaller than a certain value, the terminal is considered to be in a static state or a static type terminal; and if the GPS is turned on and the change range of the GPS positioning data within a certain time is more than or equal to a certain value, the terminal is considered to be in a mobile state or mobile type terminal.
The above description is only a preferred embodiment of the present invention, and is not intended to limit the scope of the present invention.
Claims (10)
1. A method of cell reselection, the method comprising:
determining state information of a terminal; the state information is used for indicating the current running state of the terminal;
when the running state is determined to be the moving state, adopting reselection parameters broadcasted by a network side; when the running state is determined to be a static state, correcting reselection parameters broadcasted by the network side according to a bias value; wherein, the correction mode is as follows:
the start-up threshold of the terminal side is-18 dB of the start-up threshold of the network broadcast;
the reselection delay time at the terminal side is equal to the reselection delay time of the network broadcast +2 seconds.
2. The method of claim 1, wherein the determining the state information of the terminal comprises:
determining the state information of the terminal based on the mobility attribute preset by the terminal;
the current operation state of the terminal indicated by the state information of the terminal is the same as the operation state of the terminal indicated by the preset mobility attribute.
3. The method of claim 1, wherein the determining the state information of the terminal comprises:
determining state information of the terminal based on the times of cell reselection occurring within preset time;
when the number of times of cell reselection is larger than or equal to a preset threshold, determining that the terminal is in a moving state; otherwise, determining that the terminal is in a static state.
4. The method of claim 1, wherein the determining the state information of the terminal comprises:
and determining the state information of the terminal based on the reference signal received power RSRP or the fluctuation of the signal to interference plus noise ratio SINR in the preset time.
5. The method of claim 4, wherein the determining the state information of the terminal based on the fluctuation of the RSRP or the SINR within the preset time comprises:
if the average value or variance of the RSRP or SINR fluctuation in the preset time is smaller than the preset value, determining that the terminal is in a static state;
and if the average value or the variance of the RSRP or the SINR fluctuation in the preset time is more than or equal to the preset value, determining that the terminal is in a moving state.
6. The method of claim 1, wherein the determining the state information of the terminal comprises:
and determining the state information of the terminal based on the change situation of the GPS information of the terminal.
7. The method according to claim 6, wherein the determining the state information of the terminal based on the change of the GPS information of the terminal comprises:
if the GPS of the terminal is in an on state and the variation range of the GPS positioning data in the preset time is smaller than a preset value, determining that the terminal is in a static state;
and if the GPS of the terminal is in the starting state and the variation range of the GPS positioning data within the preset time is larger than or equal to the preset value, determining that the terminal is in the moving state.
8. A cell reselection apparatus, comprising:
the determining module is used for determining the state information of the terminal; the state information is used for indicating the current running state of the terminal;
the processing module is used for adopting reselection parameters broadcasted by a network side when the running state is determined to be the mobile state; when the running state is determined to be a static state, correcting reselection parameters broadcasted by the network side according to a bias value; wherein, the correction mode is as follows:
the start-up threshold of the terminal side is-18 dB of the start-up threshold of the network broadcast;
the reselection delay time at the terminal side is equal to the reselection delay time of the network broadcast +2 seconds.
9. A cell reselection apparatus, comprising: a processor and a memory for storing a computer program capable of running on the processor,
wherein the processor is adapted to perform the steps of the method of any one of claims 1-7 when running the computer program.
10. A computer-readable storage medium, on which a computer program is stored which, when being executed by a processor, carries out the steps of the method according to any one of claims 1 to 7.
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| CN112135291B (en) * | 2020-09-22 | 2023-04-18 | 展讯通信（上海）有限公司 | State detection method and device |
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| WO2007088381A1 (en) * | 2006-02-03 | 2007-08-09 | Vodafone Group Plc | Network and method for optimizing cell reselection by using an estimation of mobility of a mobile terminal |
| CN103947254A (en) * | 2011-11-18 | 2014-07-23 | 高通股份有限公司 | Methods and devices for facilitating modified cell reselection parameters and procedures when access terminals exhibit little or no mobility |
| CN104620633A (en) * | 2012-12-31 | 2015-05-13 | 富士通株式会社 | Cell reselection method, base station, terminal, and system |
| CN105898777A (en) * | 2016-04-19 | 2016-08-24 | 华为技术有限公司 | Adjacent cell measuring method and apparatus |
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| WO2007088381A1 (en) * | 2006-02-03 | 2007-08-09 | Vodafone Group Plc | Network and method for optimizing cell reselection by using an estimation of mobility of a mobile terminal |
| CN103947254A (en) * | 2011-11-18 | 2014-07-23 | 高通股份有限公司 | Methods and devices for facilitating modified cell reselection parameters and procedures when access terminals exhibit little or no mobility |
| CN104620633A (en) * | 2012-12-31 | 2015-05-13 | 富士通株式会社 | Cell reselection method, base station, terminal, and system |
| CN105898777A (en) * | 2016-04-19 | 2016-08-24 | 华为技术有限公司 | Adjacent cell measuring method and apparatus |
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