CN106535272B - Method for improving power consumption of mobile terminal for switching cell in WCDMA network - Google Patents
Method for improving power consumption of mobile terminal for switching cell in WCDMA network Download PDFInfo
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- CN106535272B CN106535272B CN201610918182.XA CN201610918182A CN106535272B CN 106535272 B CN106535272 B CN 106535272B CN 201610918182 A CN201610918182 A CN 201610918182A CN 106535272 B CN106535272 B CN 106535272B
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- 238000000034 method Methods 0.000 title claims description 29
- 238000004891 communication Methods 0.000 description 10
- 230000000694 effects Effects 0.000 description 3
- 230000023402 cell communication Effects 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
- 230000008054 signal transmission Effects 0.000 description 2
- 230000005540 biological transmission Effects 0.000 description 1
- 230000007423 decrease Effects 0.000 description 1
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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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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W36/00—Hand-off or reselection arrangements
- H04W36/08—Reselecting an access point
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W52/00—Power management, e.g. Transmission Power Control [TPC] or power classes
- H04W52/02—Power saving arrangements
- H04W52/0209—Power saving arrangements in terminal devices
- H04W52/0225—Power saving arrangements in terminal devices using monitoring of external events, e.g. the presence of a signal
- H04W52/0245—Power saving arrangements in terminal devices using monitoring of external events, e.g. the presence of a signal according to signal strength
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- 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
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Abstract
A method for improving the power consumption of a mobile terminal for switching cells in a WCDMA network comprises cell switching between the same frequency points and cell switching between different frequency points. The cell switching among the same frequency points comprises the following steps: dividing the signals into strong signals, medium signals and weak signals according to the signal intensity; setting cell switching rules of the mobile terminal under three types of signals respectively; and the mobile terminal performs cell switching according to the cell switching rule. The cell switching among the different frequency points comprises the following steps: setting a threshold value of the requested switching times, and in the mobile terminal, when the requested switching times of the switching cells reaches the threshold value of the requested switching times after the cells are switched for the last time, the mobile terminal communicates with the base station and selects a proper cell for switching. The invention can greatly reduce the power consumption of the mobile terminal caused by cell switching, and can also ensure the communication quality of the mobile terminal.
Description
Technical Field
The present invention relates to the field of communications, and in particular, to a method for improving power consumption of a mobile terminal in cell handover in a WCDMA network.
Background
With the increasing number of terminals used by the WCDMA network, the quality of cell communication will fluctuate frequently with the change of communication capacity, and finally the mobile terminal will make frequent cell switching, and the cell will have an overhead of once power consumption for each switching, and there is an extra consumption of 6ma in the standby state, so that the standby endurance of the terminal is reduced.
In the prior art, the cell signal measurement period is more than 1 second, cell (main scrambling code) switching can be performed when 2 continuous periods detect that the RSCP value (received signal strength) of an adjacent cell is better than that of the current service cell, and when the cell communication load is quite large, the situation that one switching occurs for more than 20 seconds is common, so that unnecessary switching is performed in most cases, and excessive power consumption is consumed.
Unlike TDMA, where RF operates in 1/8 time slots, WCDMA operates in full time slots, and power consumption is greater during signaling interactions for handover cells. In order to improve the communication quality, the problem that cell switching cannot be avoided is solved, and particularly in a busy interval of 7: 00-23: 00.
In a WCDMA network, the scrambling codes or frequencies of one cell are different. WCDMA is a self-interference system, and as the number of users increases, the interference increases and the capacity decreases, so the WCDMA system is a soft capacity system, and actually one cell accommodates 50 terminals. When a terminal actually having a capacity several times as large as the actual capacity of a cell in the range of a 2km base station moves, cell switching is usually frequent according to an R criterion algorithm.
Therefore, there is a need for an optimized handover strategy that can improve power consumption without affecting communication quality.
Disclosure of Invention
The present invention is directed to solve the problems of the prior art, and to provide a method for improving power consumption of a mobile terminal in cell handover in a WCDMA network. The cell switching frequency of the mobile terminal in the WCDMA network can be optimized, so that the effect of reducing radio frequency consumption caused by cell switching is achieved, the endurance is improved, and the heat productivity of the mobile phone is reduced.
The purpose of the invention is realized by the following technical scheme:
a method for improving the power consumption of a mobile terminal for switching cells in a WCDMA network comprises the cell switching between the same frequency points and the cell switching between different frequency points;
the cell switching among the same frequency points comprises the following steps:
dividing the signals into strong signals, medium signals and weak signals according to the signal intensity;
setting cell switching rules of the mobile terminal under three types of signals, namely a strong signal, a medium signal and a weak signal;
after receiving the request for switching the cell, the mobile terminal judges the type of the signal received by the mobile terminal and carries out cell switching according to the cell switching rule of the mobile terminal under the signal;
the cell switching among the different frequency points comprises the following steps:
setting a threshold value of the requested switching times, wherein in the mobile terminal, when the requested switching times of the switching cells reach the threshold value of the requested switching times after the cells are switched for the last time, the mobile terminal communicates with the base station and selects a proper cell for switching; otherwise, the mobile terminal is kept in the cell and cell switching is not carried out.
The method for improving power consumption of a mobile terminal in cell handover in a WCDMA network is described, wherein the strong signal is a signal with a signal strength greater than-85 dBm.
In the above method for improving power consumption of a mobile terminal in cell handover in a WCDMA network, in the cell handover between the same frequency points, under a strong signal, the cell handover rule of the mobile terminal is as follows: and the mobile terminal is kept in the cell and does not perform cell switching.
The method for improving the power consumption of the mobile terminal in cell handover in the WCDMA network is described, wherein the medium signal is a signal with a signal strength of-85 to-102 dBm.
The method for improving power consumption of a mobile terminal in cell handover in a WCDMA network is described above, wherein under the medium signal, the cell handover rule of the mobile terminal is as follows:
setting a signal difference threshold, searching signals of adjacent cells, judging whether the signal intensity of the searched adjacent cells is greater than that of the cell in which the mobile terminal is positioned, if not, keeping the mobile terminal in the cell in which the mobile terminal is positioned, and not switching the cells;
if so, reserving the cell with the signal intensity larger than that of the cell in which the mobile terminal is positioned, calculating the difference value between the signal intensity of the cell and that of the cell in which the mobile terminal is positioned, judging whether the difference value larger than the signal difference threshold value exists in the difference value, and if not, keeping the mobile terminal in the cell in which the mobile terminal is positioned and not switching the cells; if so, reserving the cell of which the difference value of the signal intensity of the cell where the mobile terminal is located is larger than the signal difference threshold value, and switching the cell of the mobile terminal into the cell of which the signal intensity is the maximum.
The method for improving power consumption of a mobile terminal in cell handover in a WCDMA network is described, wherein the weak signal is a signal with a signal strength less than-102 dBm.
In the above method for improving power consumption of a mobile terminal in cell handover in a WCDMA network, under weak signals, the cell handover rule of the mobile terminal is: searching signals of adjacent cells, judging whether the signal intensity of the searched adjacent cells is greater than that of the cell in which the mobile terminal is positioned, if not, keeping the mobile terminal in the cell and not switching the cells; if so, reserving the cell with the signal intensity larger than that of the cell in which the mobile terminal is positioned, and switching the cell of the mobile terminal into the cell with the maximum signal intensity.
In summary, due to the adoption of the technical scheme, the invention can greatly reduce the power consumption of the mobile terminal caused by cell switching, and can also ensure the communication quality of the mobile terminal.
Drawings
Fig. 1 is a flowchart of a method of improving power consumption of a mobile terminal in handover of a cell in a WCDMA network according to the present invention;
FIG. 2 is a consumption flow diagram for cell switching using a prior art method;
fig. 3 is a power consumption diagram for cell handover employing a method of improving power consumption of a mobile terminal for cell handover in a WCDMA network according to the present invention.
Detailed Description
The following describes embodiments of the present invention in further detail with reference to the accompanying drawings.
The present invention provides a method for improving power consumption of a mobile terminal in cell switching in a WCDMA network, please refer to fig. 1, which includes cell switching between same frequency points and cell switching between different frequency points.
The WCDMA network comprises a plurality of mobile terminals and a server, wherein the server sends requests for switching cells to the mobile terminals at regular intervals, and the interval time between the requests of adjacent switching cells is short, generally about 1 s.
And when the mobile terminal is kept in place or the moving range is small, the cell of the mobile terminal is switched to the cell between the same frequency points.
The method for cell switching between the same frequency points specifically comprises the following steps:
dividing the signals into strong signals, medium signals and weak signals according to the signal intensity; the strong signal is a signal with signal strength greater than-85 dBm; the middle signal is a signal with the signal intensity of-85 to-102 dBm; the weak signal is a signal with a signal strength less than-102 dBm.
The mobile terminal is provided with a WCDMA chip, the WCDMA chip comprises a radio frequency module, and the cell switching is carried out through the radio frequency module.
And setting cell switching rules of the mobile terminal under three types of signals, namely a strong signal, a medium signal and a weak signal, through the WCDMA chip. The mobile terminal can receive a request for switching the cell at regular time, the WCDMA chip measures the cell signal according to the request, and the period of the request is fixed.
After receiving the request for switching the cell, the mobile terminal firstly judges the type of the received signal and then carries out cell switching according to the cell switching rule of the mobile terminal under the signal.
If the signal received by the mobile terminal is a strong signal, the cell switching rule of the mobile terminal is as follows: and the mobile terminal is kept in the cell and does not perform cell switching. That is, even if a signal having a signal strength higher than that of the cell in which the mobile terminal is located is found in a strong signal, the mobile terminal is kept in the cell and cell switching is not performed.
Under the condition of strong signals, the method greatly reduces the possibility of network drop of the mobile terminal due to signal reasons, improves the reliability of data transmission, and the mobile terminal does not need to search for better signals in a cell switching mode.
If the signal received by the mobile terminal is a medium signal, the cell switching rule of the mobile terminal is as follows:
and setting a signal difference threshold, wherein the setting of the signal difference threshold can be changed according to the actual situation.
Searching signals of adjacent cells, judging whether the signal intensity of the searched adjacent cells is greater than that of the cell in which the mobile terminal is positioned, if not, keeping the mobile terminal in the cell and not switching the cells;
if so, reserving the cell with the signal intensity larger than that of the cell in which the mobile terminal is positioned, calculating the difference value between the signal intensity of the cell and that of the cell in which the mobile terminal is positioned, judging whether the difference value larger than the signal difference threshold value exists in the difference value, and if not, keeping the mobile terminal in the cell in which the mobile terminal is positioned and not switching the cells; if so, reserving the cell of which the difference value of the signal intensity of the cell where the mobile terminal is located is larger than the signal difference threshold value, and switching the cell of the mobile terminal into the cell of which the signal intensity is the maximum.
Under the condition of medium signal, by the method, when the signal intensity of the searched adjacent cell is larger than the existing signal intensity, and the difference value between the two reaches a certain value, the cell switching is carried out. Therefore, the mobile terminal can be switched into a cell with higher signal strength, the power consumption during cell switching can be reduced, and the side effects of network drop and unsmooth communication caused by the limitation of cell switching rules under the medium signal can be avoided.
Under weak signals, the cell switching rule of the mobile terminal is as follows: searching signals of adjacent cells, judging whether the signal intensity of the searched adjacent cells is greater than that of the cell in which the mobile terminal is positioned, if not, keeping the mobile terminal in the cell and not switching the cells; if so, reserving the cell with the signal intensity larger than that of the cell in which the mobile terminal is positioned, and switching the cell of the mobile terminal into the cell with the maximum signal intensity.
Under weak signals, by the method, when a cell which is higher than the signal strength of the cell is searched, the mobile terminal is switched to the cell with higher signal strength, so that the communication quality of the mobile terminal is ensured, and the normal signal transmission of the mobile terminal is ensured.
When the mobile terminal has a large moving range, the mobile terminal can enter different network frequency points, and at the moment, the mobile terminal is switched among different frequency points.
The method for cell switching among different frequency points specifically comprises the following steps:
setting a threshold value of the requested switching times, wherein in the mobile terminal, when the requested switching times of the switching cells reach the threshold value of the requested switching times after the cells are switched for the last time, the mobile terminal communicates with the base station and selects a proper cell for switching; otherwise, the mobile terminal is kept in the cell and cell switching is not carried out.
The cell switching between different frequency points does not refer to the strength of signals of two cells, but needs to be carried out after the request times for switching the cells reach a certain value, and the switched cells are the cells with proper positions of the mobile terminal, so that unnecessary power consumption caused by frequent switching can be avoided, and the possibility of network drop of the mobile terminal due to signal reasons can be reduced.
Since the time interval of the request of the adjacent handover cell is short, generally about 1s, the threshold of the number of requested handovers is generally set to 40 times. In practical application, the threshold of the requested switching times may be changed according to the moving speed of the mobile terminal.
By the method, the communication quality of the mobile terminal during large-range movement can be ensured, the power consumption of the mobile terminal caused by cell switching can be reduced, and the transmission of signals is ensured.
Referring to fig. 2 and 3, compared with the prior art, after the method for improving the power consumption of the mobile terminal for switching the cell in the WCDMA network is adopted, the power consumption of the mobile terminal for switching the cell is greatly reduced. Therefore, the invention can effectively improve the flow consumption of the mobile terminal in the switching cell of the WCDMA network, and simultaneously ensure the communication quality, and can not cause the side effects of network drop and unsmooth communication because of limiting the switching cell.
The above-mentioned embodiments are only for illustrating the technical ideas and features of the present invention, and the purpose thereof is to enable those skilled in the art to understand the contents of the present invention and to implement the same, and the present invention is not limited to the embodiments, i.e. all equivalent changes or modifications made according to the spirit of the present invention are still within the scope of the present invention.
Claims (7)
1. A method for improving the power consumption of a mobile terminal for switching cells in a WCDMA network is characterized by comprising the cell switching between the same frequency points and the cell switching between different frequency points;
the cell switching among the same frequency points comprises the following steps:
dividing the signals into strong signals, medium signals and weak signals according to the signal intensity;
setting cell switching rules of the mobile terminal under three types of signals, namely a strong signal, a medium signal and a weak signal;
after receiving the request for switching the cell, the mobile terminal judges the type of the signal received by the mobile terminal and carries out cell switching according to the cell switching rule of the mobile terminal under the signal;
the cell switching among the different frequency points comprises the following steps:
setting a threshold value of the requested switching times, wherein in the mobile terminal, when the requested switching times of the switching cells reach the threshold value of the requested switching times after the cells are switched for the last time, the mobile terminal communicates with the base station and selects a proper cell for switching; otherwise, the mobile terminal is kept in the cell and cell switching is not carried out.
2. The method of claim 1, wherein the strong signal is a signal with a signal strength greater than-85 dBm.
3. The method as claimed in claim 2, wherein in the cell handover between the same frequency points, under strong signal, the cell handover rule of the mobile terminal is as follows: and the mobile terminal is kept in the cell and does not perform cell switching.
4. The method as claimed in claim 1, wherein the mid signal is a signal having a signal strength of-85 to-102 dBm.
5. The method of claim 4, wherein the cell handover rule of the mobile terminal is as follows:
setting a signal difference threshold, searching signals of adjacent cells, judging whether the signal intensity of the searched adjacent cells is greater than that of the cell in which the mobile terminal is positioned, if not, keeping the mobile terminal in the cell in which the mobile terminal is positioned, and not switching the cells;
if so, reserving the cell with the signal intensity larger than that of the cell in which the mobile terminal is positioned, calculating the difference value between the signal intensity of the cell and that of the cell in which the mobile terminal is positioned, judging whether the difference value larger than the signal difference threshold value exists in the difference value, and if not, keeping the mobile terminal in the cell in which the mobile terminal is positioned and not switching the cells; if so, reserving the cell of which the difference value of the signal intensity of the cell where the mobile terminal is located is larger than the signal difference threshold value, and switching the cell of the mobile terminal into the cell of which the signal intensity is the maximum.
6. The method of claim 1, wherein the weak signal is a signal with a signal strength less than-102 dBm.
7. The method of claim 6, wherein in weak signal, the cell switching rule of the mobile terminal is: searching signals of adjacent cells, judging whether the signal intensity of the searched adjacent cells is greater than that of the cell in which the mobile terminal is positioned, if not, keeping the mobile terminal in the cell and not switching the cells; if so, reserving the cell with the signal intensity larger than that of the cell in which the mobile terminal is positioned, and switching the cell of the mobile terminal into the cell with the maximum signal intensity.
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|---|---|---|---|---|
| CN101635949A (en) * | 2008-07-25 | 2010-01-27 | 三星电子株式会社 | Switching method in wireless cellular network |
| CN103957584A (en) * | 2009-05-28 | 2014-07-30 | 高通股份有限公司 | Reducing frequent handoffs of a wireless communication device |
| CN104335634A (en) * | 2012-06-26 | 2015-02-04 | 苹果公司 | Cell re-selection in a device configured to operate according to multiple cellular communication protocols |
| GB2514718B (en) * | 2010-04-12 | 2015-02-18 | Samsung Electronics Co Ltd | Handover with carrier aggregation |
| CN106028365A (en) * | 2015-03-20 | 2016-10-12 | 中兴通讯股份有限公司 | Base station configuration method and device |
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Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101635949A (en) * | 2008-07-25 | 2010-01-27 | 三星电子株式会社 | Switching method in wireless cellular network |
| CN103957584A (en) * | 2009-05-28 | 2014-07-30 | 高通股份有限公司 | Reducing frequent handoffs of a wireless communication device |
| GB2514718B (en) * | 2010-04-12 | 2015-02-18 | Samsung Electronics Co Ltd | Handover with carrier aggregation |
| CN104335634A (en) * | 2012-06-26 | 2015-02-04 | 苹果公司 | Cell re-selection in a device configured to operate according to multiple cellular communication protocols |
| CN106028365A (en) * | 2015-03-20 | 2016-10-12 | 中兴通讯股份有限公司 | Base station configuration method and device |
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