CN109041081B - Method for improving energy utilization efficiency of NB-IoT terminal equipment - Google Patents

Method for improving energy utilization efficiency of NB-IoT terminal equipment Download PDF

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Publication number
CN109041081B
CN109041081B CN201810816727.5A CN201810816727A CN109041081B CN 109041081 B CN109041081 B CN 109041081B CN 201810816727 A CN201810816727 A CN 201810816727A CN 109041081 B CN109041081 B CN 109041081B
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mobile terminal
base station
data
predicted
utilization efficiency
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CN109041081A (en
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刘昊
任忆
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Southeast University Wuxi Institute Of Integrated Circuit Technology
Southeast University
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Southeast University Wuxi Institute Of Integrated Circuit Technology
Southeast University
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    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W24/00—Supervisory, monitoring or testing arrangements
    • H04W24/02—Arrangements for optimising operational condition
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W52/00—Power management, e.g. TPC [Transmission Power Control], power saving 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
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W52/00—Power management, e.g. TPC [Transmission Power Control], power saving 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
    • H04W52/0248—Power saving arrangements in terminal devices using monitoring of external events, e.g. the presence of a signal dependent on the time of the day, e.g. according to expected transmission activity
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W52/00—Power management, e.g. TPC [Transmission Power Control], power saving or power classes
    • H04W52/02—Power saving arrangements
    • H04W52/0209—Power saving arrangements in terminal devices
    • H04W52/0261—Power saving arrangements in terminal devices managing power supply demand, e.g. depending on battery level
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W76/00—Connection management
    • H04W76/20—Manipulation of established connections
    • H04W76/28—Discontinuous transmission [DTX]; Discontinuous reception [DRX]
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W4/00—Services specially adapted for wireless communication networks; Facilities therefor
    • H04W4/70—Services for machine-to-machine communication [M2M] or machine type communication [MTC]
    • 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 method for improving the energy utilization efficiency of NB-IoT terminal equipment, which comprises the following steps: after the base station establishes connection with the mobile terminal, the base station counts the total amount of data successfully transmitted by the DL-DCCH logical channel in the connection establishment state of the mobile terminal, and the mobile terminal counts the total amount of data successfully received by the DL-DCCH logical channel in the connection establishment state; after the connection is disconnected, the base station and the mobile terminal respectively calculate the average value and the variance according to the current total data amount and previous records; the base station and the mobile terminal respectively judge whether the variance is greater than a preset threshold value, and if the variance is less than the preset threshold value, the average value is respectively used as a predicted receiving completion parameter; after the base station and the mobile terminal are connected again, when the received data volume is more than or equal to the predicted receiving completion parameter, the time for entering the sleep state is shortened, and the sleep time is prolonged. The method can predict the communication data volume of the Internet of things equipment, and prolong the sleep time when the data is predicted not to be received any more, so that the aim of reducing the power consumption is fulfilled.

Description

Method for improving energy utilization efficiency of NB-IoT terminal equipment
Technical Field
The invention belongs to the field of mobile communication, and particularly relates to a method for improving energy utilization efficiency of NB-IoT (NB-IoT) terminal equipment.
Background
In the prior art, a mobile terminal is in an active mode when using a 4G network for data transmission. After downlink data reception is completed each time, starting a deactivation timer, and if data is not received before the deactivation timer overflows, entering a discontinuous reception mode for data reception; in a discontinuous reception period, the period is divided into an on duration stage and a sleep stage, the terminal monitors and receives data of a Physical Downlink Control Channel (PDCCH) only in the on duration stage, and in the sleep stage, the mobile terminal is in a dormant state, and the radio frequency transceiver module is closed, so that the purposes of data transmission and power saving are achieved.
With the development of mobile communication networks, the demand for the support of internet of things devices is increasing. However, unlike mobile phone devices, internet of things devices have more stringent requirements for energy utilization efficiency. The discontinuous reception algorithm is used as an important method for optimizing energy utilization efficiency of a wireless link layer, and in the latest NB-IOT protocol specially applied to the Internet of things, the discontinuous reception algorithm is only simplified a little, and the targeted optimization is not performed on the characteristics of application data of the Internet of things. Therefore, the current mobile communication protocol has a great room for improvement for the internet of things equipment which greatly focuses on energy utilization efficiency.
Based on the above analysis, the present case has been made.
Disclosure of Invention
The invention aims to provide a method for improving the energy utilization efficiency of NB-IOT terminal equipment, which can prolong the sleep time when predicting that data is not received any more by predicting the communication data volume of the IOT equipment, thereby achieving the purpose of reducing power consumption.
In order to achieve the above purpose, the solution of the invention is:
a method for improving energy utilization efficiency of NB-IoT terminal equipment comprises the following steps:
step 1, after the base station establishes connection with the mobile terminal, the base station counts the total amount S of data successfully transmitted by a DL-DCCH logical channel in the connection establishment state of the mobile terminalxeThe mobile terminal counts the total amount S of data successfully received by the DL-DCCH logical channel in the connection establishment statexu；
Step 2, in the base station and moveAfter the terminal connection is disconnected, the base station and the mobile terminal respectively perform the current Sxe、SxuWith S of previous recordingsxe、SxuCalculate the mean Sxea、SxuaSum variance Dxe、Dxu；
Step 3, the base station and the mobile terminal respectively judge Dxe、DxuWhether the data volume is larger than a preset threshold value or not, if so, the data volume cannot be predicted; if less than, respectively using Sxea、SxuaAs a predicted reception completion parameter; after the base station and the mobile terminal are connected again, when the received data volume is more than or equal to the predicted receiving completion parameter, the time for entering the sleep state is shortened, and the sleep time is prolonged.
In the step 3, the data amount prediction method includes: and calculating the data according to the statistical data receiving and sending quantity so as to judge whether the terminal can predict and obtain a predicted value.
The average value and the variance are calculated for the statistical data, whether the data can be predicted or not is judged through the variance, and then the predicted value is obtained according to the average value.
In the step 3, the method for shortening the time for entering the sleep state and prolonging the sleep time includes: the base station and the mobile terminal respectively modify discontinuous reception parameters drx-InactivityTimer and drx-Cycle in an MAC layer, and the drx-InactivityTimer parameter is changed to be small and the drx-Cycle parameter is changed to be large; during implementation, the drx-InactivityTimer parameter can be changed to be minimum, and the drx-Cycle parameter can be changed to be maximum, so that the maximum effect of improving the energy utilization efficiency is achieved.
In the step 3, in the dormant state, the radio frequency transceiver module of the mobile terminal is turned off.
After the scheme is adopted, applicable objects of the invention include, but are not limited to, the internet of things equipment adopting the NB-IOT communication technology, when the currently started data receiving mode of the mobile terminal is the discontinuous receiving mode, the data receiving quantity after connection is established every time is counted, and when the data receiving reaches the prediction threshold, the time for entering the sleep state is shortened and the dormancy time is prolonged. The invention can reduce power consumption and improve energy utilization efficiency under the condition of not changing much data volume.
Drawings
FIG. 1 is a flow chart of the present invention;
fig. 2 is a schematic diagram illustrating the principle of discontinuous reception according to the present invention.
Detailed Description
The technical solution and the advantages of the present invention will be described in detail with reference to the accompanying drawings.
As shown in fig. 1, the present invention provides a method for improving energy utilization efficiency of NB-IoT terminal devices, which improves energy utilization efficiency by predicting data receiving amount after a mobile terminal X establishes a connection with a base station, and specifically includes the following steps:
step 1, after each connection is established, the base station counts the total amount S of data successfully transmitted by a DL-DCCH logical channel in the X connection establishment state of the mobile terminalxeThe mobile terminal X counts the total amount S of data successfully received by the DL-DCCH logical channel in the connection establishment statexuIdeally, the amount of data successfully transmitted by the base station to the mobile terminal X should be equal to the amount of data successfully received by the mobile terminal X, and the total amount of data recorded by the base station and the terminal is collectively referred to as Sx；
Step 2, after the base station and the mobile terminal are disconnected each time, the base station and the mobile terminal respectively perform S-shaped processing according to the current SxWith S of previous recordingsxCalculate the mean SxaSum variance Dx；
Step 3, the base station and the mobile terminal respectively judge DxAnd if the data size is larger than the preset threshold value, the complexity of the data received by the terminal is high, and the received data size cannot be predicted. If less than, then S is usedxaAs a predicted reception completion parameter; after the mobile terminal and the base station establish connection again, when the received data volume is greater than or equal to SxaAnd then, the base station and the terminal respectively modify the discontinuous reception parameters drx-InactivetyTimer and drx-Cycle in the MAC layer, and the drx-InactivetyTimer parameter is changed to be smaller and the drx-Cycle parameter is changed to be larger, so that the time for entering the sleep state is shortened, and the sleep time is prolonged. In the dormant state, the terminalThe radio frequency transceiver module is closed, thereby achieving the purpose of reducing power consumption.
The foregoing shows and describes the general principles and broad features of the present invention and advantages thereof. It will be understood by those skilled in the art that the present invention is not limited to the embodiments described above, which are described in the specification and illustrated only to illustrate the principle of the present invention, but that various changes and modifications may be made therein without departing from the spirit and scope of the present invention, which fall within the scope of the invention as claimed. The scope of the invention is defined by the appended claims and equivalents thereof.

Claims (5)

1. A method for improving energy utilization efficiency of NB-IoT terminal devices, comprising the steps of:
step 1, after the base station establishes connection with the mobile terminal, the base station counts the total amount S of data successfully transmitted by a DL-DCCH logical channel in the connection establishment state of the mobile terminalxeThe mobile terminal counts the total amount S of data successfully received by the DL-DCCH logical channel in the connection establishment statexu；
Step 2, after the base station is disconnected with the mobile terminal, the base station and the mobile terminal respectively perform S-based processing according to the current Sxe、SxuWith S of previous recordingsxe、SxuCalculate the mean Sxea、SxuaSum variance Dxe、Dxu；
Step 3, the base station and the mobile terminal respectively judge Dxe、DxuWhether the data volume is larger than a preset threshold value or not, if so, the data volume cannot be predicted; if less than, respectively using Sxea、SxuaAs a predicted reception completion parameter; after the base station and the mobile terminal establish connection again, when the received data quantity is equal to the predicted receiving completion parameter, the time for entering the sleep state is shortened, and the sleep time is prolonged.
2. The method of claim 1, wherein the method of improving energy utilization efficiency of an NB-IoT terminal device comprises: in step 3, the method for predicting the data amount is as follows: and calculating the data according to the statistical data receiving and sending quantity so as to judge whether the terminal can predict and obtain a predicted value.
3. The method of claim 1, wherein the method of improving energy utilization efficiency of an NB-IoT terminal device comprises: in the step 3, whether the data can be predicted is judged through the variance, and then a predicted value is obtained according to the average value.
4. The method of claim 1, wherein the method of improving energy utilization efficiency of an NB-IoT terminal device comprises: in step 3, the method for shortening the time for entering the sleep state and prolonging the sleep time is as follows: the base station and the mobile terminal respectively modify discontinuous reception parameters drx-InactivityTimer and drx-Cycle in an MAC layer, and the drx-InactivityTimer parameter is changed to be small and the drx-Cycle parameter is changed to be large.
5. The method of claim 4, wherein the method of improving energy utilization efficiency of the NB-IoT terminal device comprises: the drx-InactivityTimer parameter is changed to the minimum, and the drx-Cycle parameter is changed to the maximum.
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CN112398527B (en) * 2020-11-03 2021-06-29 上海擎昆信息科技有限公司 Control method and system for enabling satellite system to rapidly enter sleep state

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