CN109413717A - A kind of LTE terminal measurement cell selecting method - Google Patents
A kind of LTE terminal measurement cell selecting method Download PDFInfo
- Publication number
- CN109413717A CN109413717A CN201811430697.0A CN201811430697A CN109413717A CN 109413717 A CN109413717 A CN 109413717A CN 201811430697 A CN201811430697 A CN 201811430697A CN 109413717 A CN109413717 A CN 109413717A
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- cell
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- measurement
- tracking
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- 238000005259 measurement Methods 0.000 title claims abstract description 67
- 238000000034 method Methods 0.000 title claims abstract description 22
- 238000004891 communication Methods 0.000 description 4
- 230000006399 behavior Effects 0.000 description 2
- 230000005540 biological transmission Effects 0.000 description 2
- 230000001413 cellular effect Effects 0.000 description 2
- 238000004364 calculation method Methods 0.000 description 1
- 230000001934 delay Effects 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 230000007774 longterm Effects 0.000 description 1
- 238000007726 management method Methods 0.000 description 1
- 238000010187 selection method Methods 0.000 description 1
Classifications
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W48/00—Access restriction; Network selection; Access point selection
- H04W48/16—Discovering, processing access restriction or access information
-
- 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
-
- 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
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W36/00—Hand-off or reselection arrangements
- H04W36/24—Reselection being triggered by specific parameters
- H04W36/32—Reselection being triggered by specific parameters by location or mobility data, e.g. speed data
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W48/00—Access restriction; Network selection; Access point selection
- H04W48/20—Selecting an access point
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02D—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN INFORMATION AND COMMUNICATION TECHNOLOGIES [ICT], I.E. INFORMATION AND COMMUNICATION TECHNOLOGIES AIMING AT THE REDUCTION OF THEIR OWN ENERGY USE
- Y02D30/00—Reducing energy consumption in communication networks
- Y02D30/70—Reducing energy consumption in communication networks in wireless communication networks
Abstract
The invention discloses a kind of LTE terminals to measure cell selecting method, comprising: for the first time after the completion of measurement task, the cell that terminal records this measurement is to have measured cell, and the top-quality N number of cell of selection signal is as tracking cell in having measured cell；Estimate the timing offset of each tracking cell, the history timing offset as the tracking cell；In non-measurement task for the first time, terminal estimates the current timing offset of each tracking cell；If respectively the difference of the history timing offset of tracking cell current timing offset and the tracking cell is respectively less than preset threshold value, the cell to be measured that terminal selects this measurement task newly-increased is measured as this measurement cell；Otherwise terminal selects all cells to be measured of this measurement task to measure as this measurement cell, and technical solution of the present invention effectively reduces terminal measurement power consumption while the accuracy for guaranteeing measurement data that terminal reports and receives data volume.
Description
Technical field
The present invention relates to a kind of LTE terminals in field of communication technology, especially cellular radio Communication system field to measure cell
Selection method.
Background technique
In cellular radio Communication system, end is needed in order to carry out the management of radio resource since there are the concepts of cell
Complete cell selection, cell reselection, the behaviors such as switching in end.Cell selection is completed, the basis of cell reselection, the behaviors such as switching is pair
Several cells that base station issues complete measurement, after terminal completes the measurement of several cells, implement cell according to the result of measurement
Selection, cell reselection, switching etc..In long term evolution (referred to as, LTE) communication system, the measurement object of terminal is reference signal
Receive power (referred to as, RSRP).
In the measurement task of terminal, all cells issued all to base station are needed to measure, when cell mistake to be measured
When more (in LTE system, terminal needs to complete 64 cell measurements in a measurement period), if each measurement period is to institute
There is cell to measure, has very high requirement to reception data volume, power consumption required for terminal, be unfavorable for terminal processes efficiency
Promotion and power consumption reduction.
In order to reduce the power consumption of measurement, treatment effeciency is promoted, it in practical applications, usually will not be every time to all small
Area measures, but selected section cell is measured as measurement cell in the cell to be measured that base station issues.To measurement
The selection of cell, existing technical solution is: in view of the events such as cell reselection and switching are mainly and stronger several cells
It is related, select stronger several cells to be considered as efficient cell, only to efficient cell planning survey task when subsequent measurement.Such survey
Amount method by each time point or the signal strength measurement of period of history directly determine it is current need to measure to
Cell is surveyed, measurement power consumption is reduced.
Problem of the prior art is, when each cell received signal of terminal generates change, still only to several determinations
And measured by the cell that original historical information determines, the cell for becoming strong again can be ignored, be unfavorable for cell reselection and switching
Etc. events it is accurate starting and execution.
Summary of the invention
In order to solve the above-mentioned problems in the prior art, the invention proposes a kind of measurement cell selections of LTE terminal
Method is provided subject to more with realizing while reducing terminal measurement power consumption and receiving data volume for cell reselection and switching etc.
True information.
The technical solution of the present invention is as follows:
A kind of LTE terminal measurement cell selecting method, comprising:
For the first time after the completion of measurement task:
The cell that terminal records this measurement is to have measured cell, and to have measured selection signal in cell best in quality described
N number of cell as tracking cell；Estimate the timing offset of each tracking cell, the history timing offset as the tracking cell；
In non-measurement task for the first time:
Terminal estimates the current timing offset of each tracking cell；
Calculate the difference Time_d of the history timing offset of each tracking cell current timing offset and the tracking cell；
If respectively the Time_d of tracking cell is respectively less than preset threshold T ime_th, terminal selects this measurement task
Newly-increased cell to be measured is measured as this measurement cell, this cell measured is added to and has measured cell；
If there is the Time_d of tracking cell is greater than preset threshold T ime_th, terminal selects this measurement task
All cells to be measured are measured as this measurement cell, and the cell for recording this measurement is to have measured cell；
The top-quality N number of cell of terminal selection signal in having measured cell is as tracking cell；Estimate that each tracking is small
The timing offset in area, the history timing offset as the tracking cell.
Preferably, the top-quality N number of cell of the selection signal includes: as tracking cell
Referred to as, terminal obtains the signal-to-noise ratio (SNR) for respectively having measured cell；
Terminal selects the maximum N number of cell of SNR as tracking cell.
Preferably, the top-quality N number of cell of the selection signal includes: as tracking cell
Referred to as, terminal obtains the Signal to Interference plus Noise Ratio (SINR) for respectively having measured cell；
Terminal selects the maximum N number of cell of SINR as tracking cell.
Preferably, the top-quality N number of cell of the selection signal includes: as tracking cell
Referred to as, terminal obtains the received signal quality (RSRQ) for respectively having measured cell；
Terminal selects the maximum N number of cell of RSRQ as tracking cell.
Preferably, the value of the quantity N of the tracking cell are as follows:
N=K/2, wherein K is to have measured number of cells.
Preferably, the value of the quantity N of the tracking cell are as follows:
N=min (K, M)；K is to have measured number of cells, and M is the integer not less than 3, and min () is to be minimized operation.
Preferably, the value of the M is 3.
Preferably, the value range of the Time_th are as follows:
Preferably, the value of the Time_th is
In practical application scene, when there is no when movement, the received signal strength of each cell will not occur greatly for terminal
Variation；And when terminal has occurred large range of mobile, the received signal strength of each cell would generally have a greater change,
Terminal is needed by re-measuring the received signal strength for updating each cell.In technical solution of the present invention, LTE terminal is completed
For the first time after measurement task, tracking cell, in subsequent measurement task, terminal are selected according to the signal quality for respectively having measured cell
First determine whether the timing offset of each tracking cell and the difference of the history timing offset of the cell are less than preset threshold value,
If so, illustrating terminal there is no moving on a large scale, terminal only measures the newly-increased cell of this measurement task, directly
It connects and continues to use the RSRP of last time and reported；If the difference is not less than preset threshold value, illustrate terminal in measurement task twice
Large range of movement has occurred in the process, terminal will measure all cells to be measured of this measurement task at this time.This
The technical solution of invention effectively reduces while the accuracy for guaranteeing measurement data that terminal reports
Terminal measures power consumption and receives data volume.
Detailed description of the invention
Fig. 1 is the flow chart of LTE terminal measurement cell selecting method of the present invention.
Specific embodiment
Technical solution in order to better illustrate the present invention with reference to the accompanying drawing carries out a specific embodiment of the invention
Detailed description.
Specific embodiment
The present embodiment is a kind of preferred embodiment that LTE terminal of the present invention measures cell selecting method, referring to Fig. 1, such as
Shown in Fig. 1, the detailed process of the present embodiment includes:
S1, terminal execute measurement task for the first time, measure to all cells to be measured；
The cell that S2, terminal record this measurement is to have measured cell；
The top-quality N number of cell that measured of S3, terminal select signal is as tracking cell；
In the present embodiment, the signal quality can use any one cell signal quality parameter；The cell signal
The acquisition methods of mass parameter can be using the calculation method of any one cell signal quality parameter in the prior art, this hair
It is bright to be not limited in this respect.
It, can be using the SNR of cell as the cell signal in this step as the preferred implementation scheme of the present embodiment
Mass parameter, terminal select the maximum N number of cell of SNR as tracking cell.
Signal quality parameter of the SINR as the cell can also be used, terminal selects the maximum N number of cell of SINR to make
To track cell.
Signal quality parameter of the RSRQ as the cell can also be used, terminal selects the maximum N number of cell of RSRQ to make
To track cell.
In the present embodiment, tracking number of cells N can be configured according to the performance of actual application scenarios and terminal.
As the preferred implementation scheme of the present embodiment, N can be set to K/2, wherein K is the quantity for having measured cell；
Also N=min (K, M) can be set；K is to have measured number of cells, and M is the integer not less than 3, and min () is to take most
Small Value Operations；Further, the preferred value of the M is 3.
S4, terminal estimate the timing offset of each tracking cell, the history timing offset as the tracking cell；
When S5, the non-measurement task for the first time of execution, terminal estimates the current timing offset of each tracking cell first；
S6, the difference Time_ for calculating each tracking cell current timing offset and the history timing offset of the tracking cell
d；
If the Time_d of S7, each tracking cell are respectively less than preset threshold T ime_th, step S8 is executed, is otherwise held
Row step S9；
Wherein, the Time_th can be default according to practical application scene；In the present embodiment, the value of the Time_th
Range are as follows:
Further, the preferred value of the Time_th is
The cell to be measured that S8, terminal select this measurement task newly-increased is measured as this measurement cell, incite somebody to action this
The cell of secondary measurement, which is added to, has measured cell；Execute step S10；
S9, terminal select all cells to be measured of this measurement task to measure as this measurement cell, record
The cell of this measurement is to have measured cell；
The top-quality N number of cell that measured of S10, terminal select signal is as tracking cell；
S11, terminal estimate the timing offset of each tracking cell, the history timing offset as the tracking cell.
In practical application scene, when there is no when movement, the received signal strength of each cell will not occur greatly for terminal
Variation；And when terminal has occurred large range of mobile, the received signal strength of each cell would generally have a greater change,
Terminal is needed by re-measuring the received signal strength for updating each cell.In above-mentioned specific embodiment of the invention, according to
The timing offset of several cells changes to determine whether the transmission range time delay of several different cells is changed, so as to
To determine whether terminal has occurred movement, if the transmission range time delay of several cells is said all there is no significantly changing
The position of bright terminal is opposing stationary, and there is no significantly moving, then all propagation distance time delays for having measured cell all do not have
It substantially change, the RSRP for respectively having measured cell will not change, and the cell without having measured last time carries out again
Measurement, otherwise, illustrates that apparent movement has occurred in terminal between measurement task twice, the cell weight for needing to have measured last time
Newly measure to obtain accurate measurement data.Technical solution of the present invention solves reduction measurement existing in the prior art
The contradiction between the accuracy of measurement data that power consumption and guarantee report, in the accuracy for guaranteeing measurement data that terminal reports
Terminal measurement power consumption is effectively reduced simultaneously and receives data volume.
It should be noted that the above examples are only used to illustrate the technical scheme of the present invention and are not limiting, although referring to compared with
Good embodiment describes the invention in detail, those skilled in the art should understand that, it can be to skill of the invention
Art scheme is modified or replaced equivalently, and without departing from the objective and range of technical solution of the present invention, should all be covered at this
In the scope of the claims of invention.
Claims (9)
1. a kind of LTE terminal measures cell selecting method characterized by comprising
For the first time after the completion of measurement task:
The cell that terminal records this measurement is to have measured cell, has measured the top-quality N of selection signal in cell described
A cell is as tracking cell；Estimate the timing offset of each tracking cell, the history timing offset as the tracking cell；
In non-measurement task for the first time:
Terminal estimates the current timing offset of each tracking cell；
Calculate the difference Time_d of the history timing offset of each tracking cell current timing offset and the tracking cell；
If respectively the Time_d of tracking cell is respectively less than preset threshold T ime_th, terminal selects this measurement task newly-increased
Cell to be measured measured as this measurement cell, this cell measured is added to and has measured cell；
If there is the Time_d of tracking cell is greater than preset threshold T ime_th, terminal selects all of this measurement task
Cell to be measured is measured as this measurement cell, and the cell for recording this measurement is to have measured cell；
The top-quality N number of cell of terminal selection signal in having measured cell is as tracking cell；Estimate each tracking cell
Timing offset, the history timing offset as the tracking cell.
2. the method according to claim 1, wherein the top-quality N number of cell of the selection signal be used as with
Track cell includes:
Terminal obtains the signal-to-noise ratio for respectively having measured cell；
Terminal selects the maximum N number of cell of signal-to-noise ratio as tracking cell.
3. the method according to claim 1, wherein the top-quality N number of cell of the selection signal be used as with
Track cell includes:
Terminal obtains the Signal to Interference plus Noise Ratio for respectively having measured cell；
Terminal select signal and interference plus noise are used as than maximum N number of cell tracks cell.
4. the method according to claim 1, wherein the top-quality N number of cell of the selection signal be used as with
Track cell includes:
Terminal obtains the received signal quality for respectively having measured cell；
Terminal selects the maximum N number of cell of received signal quality as tracking cell.
5. method according to any one of claims 1 to 4, which is characterized in that the value of the N are as follows:
N=K/2, wherein K is to have measured number of cells.
6. method according to any one of claims 1 to 4, which is characterized in that the value of the N are as follows:
N=min (K, M)；
Wherein, K is to have measured number of cells, and M is the integer not less than 3, and min () is to be minimized operation.
7. according to the method described in claim 6, it is characterized by:
The value of the M is 3.
8. method according to any one of claims 1 to 4, it is characterised in that:
The value range of the Time_th are as follows:
9. according to the method described in claim 8, it is characterized by:
The value of the Time_th is
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| CN201811430697.0A CN109413717B (en) | 2018-11-28 | 2018-11-28 | LTE terminal measurement cell selection method |
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| CN201811430697.0A CN109413717B (en) | 2018-11-28 | 2018-11-28 | LTE terminal measurement cell selection method |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN110782550A (en) * | 2019-09-20 | 2020-02-11 | 腾讯科技（深圳）有限公司 | Data acquisition method, device and equipment |
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Effective date of registration: 20231025 Address after: 518000 1104, Building A, Zhiyun Industrial Park, No. 13, Huaxing Road, Henglang Community, Longhua District, Shenzhen, Guangdong Province Patentee after: Shenzhen Hongyue Information Technology Co.,Ltd. Address before: 400065 Chongwen Road, Nanshan Street, Nanan District, Chongqing Patentee before: CHONGQING University OF POSTS AND TELECOMMUNICATIONS |