CN109246809B - Terminal power saving method and system - Google Patents
Terminal power saving method and system Download PDFInfo
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- CN109246809B CN109246809B CN201811270690.7A CN201811270690A CN109246809B CN 109246809 B CN109246809 B CN 109246809B CN 201811270690 A CN201811270690 A CN 201811270690A CN 109246809 B CN109246809 B CN 109246809B
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- 230000003213 activating effect Effects 0.000 claims 1
- 238000004891 communication Methods 0.000 abstract description 8
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- 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
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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
The invention discloses a terminal power saving method and system, and relates to the technical field of communication. The invention calculates the power consumption of the terminal and reports the power consumption to the mobile management entity MME through the NAS message, and the mobile management entity MME determines whether to adjust the activation timer AT of the PSM according to the power consumption and how to adjust the activation timer AT, thereby dynamically and reasonably adjusting the activation timer AT according to the actual power consumption condition of the terminal and greatly reducing the power consumption problem of the terminal.
Description
Technical Field
The invention relates to the technical field of communication, in particular to a terminal power saving method and system.
Background
At present, a narrowband Internet of Things (NB-IoT) based on a honeycomb is used as an Internet of Things technology based on 3GPP LTE standard protocol evolution, mainly oriented to an Internet of Things application scenario with medium-low rate, deep coverage, low power consumption and large connection, and has the advantages of high spectrum resource utilization rate, deep coverage, low power consumption, capability of supporting a large number of medium-low rate users, and the like.
With the rapid development of the intelligent terminal, more and more application scenes can be supported by the terminal, and the power consumption of the terminal is faster and faster when the terminal is used. In an NB-IoT network, a terminal mainly relies on a Power Saving Mode (PSM) mechanism and an extended Discontinuous Reception (eDRX) mechanism to implement sleep, so as to reduce Power consumption of the terminal. Even if the TA is changed due to the movement of the UE, the PSM mode cannot be exited, and the network side can control the time of the UE in the PSM mode by configuring the duration of the periodic TAU/TRU timer. However, in the existing NB-IoT network, if the periodic TAU/TRU timer is not set reasonably, the power consumption of the terminal is still relatively large.
Disclosure of Invention
The embodiment of the invention provides a terminal power saving method, which can greatly reduce the power consumption of a terminal by reasonably setting a timer.
In order to achieve the above object, an embodiment of the present invention provides a terminal power saving method, which is applied to a terminal power saving system, and the method includes:
if the terminal enters an idle mode from a connection mode, starting an activation timer AT of a power saving mode PSM;
if the AT is overtime, the terminal exits the idle mode and enters the PSM;
if the periodic TAU/TRU timer is overtime, the terminal exits the PSM;
wherein the activation timer AT is determined by a mobility management entity MME according to the power consumption of the terminal.
Correspondingly, the embodiment of the invention also provides a terminal power saving system, which comprises a terminal and a mobile management entity MME;
the terminal is configured to start an activation timer AT of a power saving mode PSM if the terminal enters an idle mode from a connected mode;
if the AT is overtime, exiting the idle mode and entering the PSM; and the number of the first and second groups,
if the periodic TAU/TRU timer is overtime, exiting the PSM;
and the MME is used for determining the activation timer AT according to the power consumption of the terminal.
The invention calculates the power consumption of the terminal and reports the power consumption to the mobile management entity MME through the NAS message, and the mobile management entity MME determines whether to adjust the activation timer AT of the PSM according to the power consumption and how to adjust the activation timer AT, thereby dynamically and reasonably adjusting the activation timer AT according to the actual power consumption condition of the terminal and greatly reducing the power consumption problem of the terminal.
Drawings
In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the drawings needed to be used in the description of the embodiments will be briefly introduced below, and it is obvious that the drawings in the following description are only some embodiments of the present invention, and it is obvious for those skilled in the art to obtain other drawings based on these drawings without creative efforts.
Fig. 1 is a schematic network architecture diagram of a terminal power saving system in an LTE network implementation environment according to an embodiment of the present invention;
FIG. 2 is a schematic diagram of mode implementation of a PSM mechanism according to an embodiment of the present invention
FIG. 3 is a flowchart of a terminal power saving method according to an embodiment of the present invention;
fig. 4 is a schematic structural diagram of a terminal power saving system according to an embodiment of the present invention.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
As shown in fig. 1, a schematic diagram of a network architecture of a terminal power saving system in an LTE network implementation environment is shown. The network architecture diagram of the implementation environment comprises a terminal, an eNodeB, an IoT core network, an IoT platform and an application server, wherein the terminal is connected to the eNodeB through an air interface; the eNodeB undertakes the related functions of air interface access processing, cell management and the like, is connected with an IoT core network through an S1 interface and forwards the data of the non-access layer to a high-level network element for processing; the IoT core network takes on the function of interacting with the non-access stratum of the terminal and forwards the IoT service related data to the IoT platform for processing. The IoT platform is used for converging IoT data obtained from various access networks and forwarding the IoT data to the corresponding service application device for processing according to different types. The application server is a final aggregation point of the IoT data, and is used for performing data processing and other operations according to the needs of the client. Fig. 1 is a schematic diagram, and does not limit the interaction between other units and each unit of the network architecture.
Since 3GPP specifies that NB-IoT requires a 20dB improvement over GPRS in coverage to support three coverage classes: MCL 144dB, MCL 154dB and MCL 164dB, where MCL is Minimum Coupling Loss (Minimum Coupling Loss) for representing the Minimum Coupling Loss between the base station and the transmitting and receiving parts of the handset.
The NB-IoT downlink enhances the coverage in a data repetition mode, and the uplink enhances the coverage in a data repetition and uplink power spectral density boosting mode. Specifically, coverage can be defined as three levels:
coverage grade 0(CEL 0): MCL is less than 144 dB;
coverage grade 1(CEL 1): MCL is less than 154 dB;
coverage grade 2(CEL 2): MCL is less than 164 dB.
In each coverage level, a Random Access Narrowband Physical Random Access Channel (NPRACH) may set a fixed information repetition number of the coverage level, where a setting rule of the fixed information repetition number may be: the fixed information repetition number increases as the coverage level increases. When a user accesses a network under a certain coverage grade, a terminal can access the network by the fixed information repetition times set under the coverage grade, if the times reach the maximum access attempt times set by a base station side, the terminal can increase the coverage grade to a higher level for access attempt, and the fixed information repetition times are increased along with the increase of the coverage grade, so that the information repetition times can be increased for random access after the terminal increases the coverage grade.
Due to the introduction of data repetition and a mechanism for improving the uplink power spectral density, the power consumption of the terminal is inevitably a big challenge, and therefore, a PSM mechanism is introduced in the NB-IoT network to realize dormancy, so that the power consumption of the terminal is reduced. As shown in fig. 2, a mode and an implementation diagram of a PSM mechanism according to an embodiment of the present invention are shown, where the PSM mechanism includes four modes: connected mode (Connected), Idle mode (Idle), Power Saving Mode (PSM), and awake sleep mode (Wake). In general, the power relationships for the four modes are: connected mode > idle mode > awake sleep mode > power save mode.
An embodiment of the present invention provides a terminal power saving method, and as shown in fig. 3, a flowchart of the terminal power saving method of the present invention is shown, where the method is applied to a terminal power saving system, and the method specifically includes:
s101, if the terminal enters an idle mode from a connection mode, starting an activation timer AT of a power saving mode PSM.
Wherein the activation timer AT is determined by a mobility management entity MME according to the power consumption of the terminal.
When the terminal enters the idle mode from the connected mode, an activation timer AT of the power saving mode PSM is started, and the activation timer AT can be determined by the terminal and a mobile management entity MME through non-access stratum message NAS message negotiation.
And S102, if the activation timer AT is overtime, the terminal exits the idle mode and enters the PSM.
In an idle mode, if the activation timer AT is overtime, the MME determines that the terminal enters the PSM, in the mode, the terminal deactivates the random access layer (AS) function, the network side rejects downlink service and paging, and the terminal stops the function in the idle mode, for example, cell selection, thereby saving the electric quantity of the terminal.
S103, if the periodic TAU/TRU timer is overtime, the terminal quits the PSM.
If the periodic TAU/TRU timer is overtime, the terminal recovers its random access layer (AS) function, and at the same time, the network side recovers the downlink service and paging, so the terminal recovers the function in idle mode.
The network side can control the time of the terminal in the PSM mode by configuring the duration of the periodic TAU/TRU timer. Specifically, how to configure the periodic TAU/TRU timer and according to what the periodic TAU/TRU timer is configured on the network side are not limited in the embodiment of the present invention.
Further, if the terminal needs to send MO data, the terminal exits PSM.
Specifically, if the terminal initiates MO (mobile initialization) communication, MO communication initialization is required to send MO data, and the terminal exits PSM and activates a random Access Stratum (AS) function.
Further, the activation timer AT is determined by the terminal through negotiation with the mobility management entity MME via a non-access stratum message NAS message according to the power consumption of the terminal.
Specifically, if (P _ wake _ n +1 × T _ wake _ n +1) + (Pm _ n × Tm _ n) is less than or equal to P _ total/K, the mobility management entity MME adjusts the activation timer AT;
wherein K is a high power proportionality coefficient, and K is more than or equal to 2; the P _ total is the original power consumption calculated by taking the nth task and the (n +1) th task as a set;
P_total＝(P_wake_n*T_wake_n)+(Pm_n*Tm_n)+(P_idle_n*T_idle_n)+(P_psm_n*T_psm_n)+(P_wake_n+1*T_wake_n+1)+(Pm_n+1*Tm_n+1)+(P_idle_n+1*T_idle_n+1)
the power consumption of the terminal in the sleep mode is awakened when the terminal is in the (n +1) th task; t _ wake _ n +1 is the time length of the terminal in the sleep mode when the terminal is in the (n +1) th task; p _ wake _ n is the power consumption of the terminal in the sleep mode when the terminal is in the nth task; t _ wake _ n is the time length of the terminal in the nth task in the sleep mode; pm _ n is the power consumption of the terminal in the connection mode during the nth task; tm _ n is the time length of the terminal in a connection mode during the nth task; pm _ n +1 is the power consumption of the terminal in the connection mode when the terminal is in the (n +1) th task; tm _ n +1 is the time length of the terminal in the connection mode when the terminal is in the (n +1) th task; p _ idle _ n is the power consumption of the terminal in an idle mode during the nth task; t _ idle _ n is the time length of the terminal in an idle mode during the nth task; p _ idle _ n +1 is the power consumption of the terminal in an idle mode when the terminal is in the (n +1) th task; t _ idle _ n +1 is the time length of the terminal in an idle mode when the terminal is in the (n +1) th task; p _ PSM _ n is the power consumption of the terminal in the PSM mode when the terminal is in the nth task; and T _ PSM _ n is the time length of the terminal in the PSM mode at the nth task.
Further, the mobility management entity MME adjusting the activation timer AT includes:
if (P _ wake _ n + 1T _ wake _ n +1) + (Pm _ n Tm _ n) is less than or equal to P _ total/K, according to the formula Timer_m＝Timer_m-1-(m*Tstep) Adjusting the activation timer AT;
wherein m is the adjustment times of the activation Timer AT, Timer_mTimer is the result of the m-th adjustment of the activation Timer AT_m-1The m is not less than 0 and is an integer, and the result is the m-1 adjustment of the activation timer AT; t isstepAn adjustment step size for the activation timer AT.
The MME continuously adjusts the activation timer AT according to the adjustment step length of the activation timer AT until (P _ wake _ n + 1T _ wake _ n +1) + (Pm _ n Tm _ n) > P _ total/K is met, the adjustment of the activation timer AT is stopped, and the adjusted activation timer AT is used as a new activation timer AT to control the conversion from an idle mode to a PSM.
Wherein, the initial value Timer of the activation Timer AT_0The terminal and the mobility management entity MME may perform setting through negotiation of a non-access stratum NAS message, specifically, how to perform setting and according to what rule, which is not limited in the embodiment of the present invention.
The invention calculates the power consumption of the terminal and reports the power consumption to the mobile management entity MME through the NAS message, and the mobile management entity MME determines whether to adjust the activation timer AT of the PSM according to the power consumption and how to adjust the activation timer AT, thereby dynamically and reasonably adjusting the activation timer AT according to the actual power consumption condition of the terminal and greatly reducing the power consumption problem of the terminal.
An embodiment of the present invention provides a terminal power saving system, and as shown in fig. 4, a terminal power saving system 20 of the present invention is shown, where the terminal power saving system 20 includes a terminal 210 and a mobility management entity MME 220. It will be understood by those skilled in the art that the illustration in fig. 4 is only a schematic diagram, and is not intended to limit other elements of the terminal power saving system and the interaction of the terminal power saving system with other network elements.
The terminal 210 is configured to start an activation timer AT of the power saving mode PSM if the terminal enters an idle mode from a connected mode.
Wherein the activation timer AT is determined by a mobility management entity MME according to the power consumption of the terminal.
The terminal 210 is further configured to exit the idle mode and enter the PSM if the activation timer AT is overtime; and the number of the first and second groups,
and exiting the PSM if the periodic TAU/TRU timer is overtime.
Specifically, in an idle mode, if the activation timer AT times out, the MME determines that the terminal enters the PSM, and in this mode, the terminal deactivates its random Access Stratum (AS) function, the network side rejects downlink service and paging, and the terminal stops the function in the idle mode, for example, cell selection, so that the power of the terminal can be saved.
If the periodic TAU/TRU timer is overtime, the terminal recovers its random access layer (AS) function, and at the same time, the network side recovers the downlink service and paging, so the terminal recovers the function in idle mode.
The network side can control the time of the terminal in the PSM mode by configuring the duration of the periodic TAU/TRU timer. Specifically, how to configure the periodic TAU/TRU timer and according to what the periodic TAU/TRU timer is configured on the network side are not limited in the embodiment of the present invention.
Further, if the terminal needs to send MO data, the terminal exits PSM.
Specifically, if the terminal initiates MO (mobile originating) communication, MO communication initialization is required to send MO data, the terminal exits PSM and activates a random Access Stratum (AS) function.
And the mobility management entity MME 220 is used for determining the activation timer AT according to the power consumption of the terminal.
Specifically, when the terminal enters the idle mode from the connected mode, an activation timer AT of the power saving mode PSM may be started, and the activation timer AT may be determined by the terminal and the mobility management entity MME through negotiation of a non-access stratum message NAS.
Further, the activation timer AT is determined by the terminal through negotiation with the mobility management entity MME via a non-access stratum message NAS message according to the power consumption of the terminal.
Specifically, if (P _ wake _ n +1 × T _ wake _ n +1) + (Pm _ n × Tm _ n) is less than or equal to P _ total/K, the mobility management entity MME adjusts the activation timer AT;
wherein K is a high power proportionality coefficient, and K is more than or equal to 2; the P _ total is the original power consumption calculated by taking the nth task and the (n +1) th task as a set;
P_total＝(P_wake_n*T_wake_n)+(Pm_n*Tm_n)+(P_idle_n*T_idle_n)+(P_psm_n*T_psm_n)+(P_wake_n+1*T_wake_n+1)+(Pm_n+1*Tm_n+1)+(P_idle_n+1*T_idle_n+1)
the power consumption of the terminal in the sleep mode is awakened when the terminal is in the (n +1) th task; t _ wake _ n +1 is the time length of the terminal in the sleep mode when the terminal is in the (n +1) th task; p _ wake _ n is the power consumption of the terminal in the sleep mode when the terminal is in the nth task; t _ wake _ n is the time length of the terminal in the nth task in the sleep mode; pm _ n is the power consumption of the terminal in the connection mode during the nth task; tm _ n is the time length of the terminal in a connection mode during the nth task; pm _ n +1 is the power consumption of the terminal in the connection mode when the terminal is in the (n +1) th task; tm _ n +1 is the time length of the terminal in the connection mode when the terminal is in the (n +1) th task; p _ idle _ n is the power consumption of the terminal in an idle mode during the nth task; t _ idle _ n is the time length of the terminal in an idle mode during the nth task; p _ idle _ n +1 is the power consumption of the terminal in an idle mode when the terminal is in the (n +1) th task; t _ idle _ n +1 is the time length of the terminal in an idle mode when the terminal is in the (n +1) th task; p _ PSM _ n is the power consumption of the terminal in the PSM mode when the terminal is in the nth task; and T _ PSM _ n is the time length of the terminal in the PSM mode at the nth task.
Further, the mobility management entity MME adjusting the activation timer AT includes:
if (P _ wake _ n + 1T _ wake _ n +1) + (Pm _ n Tm _ n) is less than or equal to P _ total/KAccording to the formula Timer_m＝Timer_m-1-(m*Tstep) Adjusting the activation timer AT;
wherein m is the adjustment times of the activation Timer AT, Timer_mTimer is the result of the m-th adjustment of the activation Timer AT_m-1The m is not less than 0 and is an integer, and the result is the m-1 adjustment of the activation timer AT; t isstepAn adjustment step size for the activation timer AT.
The MME continuously adjusts the activation timer AT according to the adjustment step length of the activation timer AT until (P _ wake _ n + 1T _ wake _ n +1) + (Pm _ n Tm _ n) > P _ total/K is met, the adjustment of the activation timer AT is stopped, and the adjusted activation timer AT is used as a new activation timer AT to control the conversion from an idle mode to a PSM.
Wherein, the initial value Timer of the activation Timer AT_0The terminal and the mobility management entity MME may perform setting through negotiation of a non-access stratum NAS message, specifically, how to perform setting and according to what rule, which is not limited in the embodiment of the present invention.
The invention calculates the power consumption of the terminal and reports the power consumption to the mobile management entity MME through the NAS message, and the mobile management entity MME determines whether to adjust the activation timer AT of the PSM according to the power consumption and how to adjust the activation timer AT, thereby dynamically and reasonably adjusting the activation timer AT according to the actual power consumption condition of the terminal and greatly reducing the power consumption problem of the terminal.
In the several embodiments provided in the present application, it should be understood that the disclosed method and system may be implemented in other ways. For example, the above-described system embodiments are merely illustrative, and for example, the division of the functional blocks is only one logical division, and other divisions may be realized in practice, for example, multiple units or components may be combined or integrated into another system, or some features may be omitted, or not executed. In addition, the shown or discussed mutual coupling or direct coupling or communication connection may be an indirect coupling or communication connection through some interfaces, devices or units, and may be in an electrical, mechanical or other form.
The units described as separate parts may or may not be physically separate, and parts displayed as units may or may not be physical units, may be located in one place, or may be distributed on a plurality of network units. Some or all of the units can be selected according to actual needs to achieve the purpose of the solution of the embodiment.
In addition, functional modules in the embodiments of the present invention may be integrated into one processing unit, or each unit may be physically included alone, or two or more units may be integrated into one unit. The integrated unit can be realized in a form of hardware, or in a form of hardware plus a software functional unit.
The integrated unit implemented in the form of a software functional unit may be stored in a computer readable storage medium. The software functional unit is stored in a storage medium and includes several instructions for causing a computer device (which may be a personal computer, a server, or a network device) to execute some steps of the methods according to the embodiments of the present invention. And the aforementioned storage medium includes: various media capable of storing program codes, such as a usb disk, a removable hard disk, a Read-Only Memory (ROM), a Random Access Memory (RAM), a magnetic disk, or an optical disk.
The above description is only for the specific embodiments of the present invention, but the scope of the present invention is not limited thereto, and any person skilled in the art can easily conceive of the changes or substitutions within the technical scope of the present invention, and all the changes or substitutions should be covered within the scope of the present invention. Therefore, the protection scope of the present invention shall be subject to the protection scope of the appended claims.
Claims (6)
1. A terminal power saving method, characterized in that the terminal power saving method comprises,
if the terminal enters an idle mode from a connection mode, starting an activation timer AT of a power saving mode PSM;
if the AT is overtime, the terminal exits the idle mode and enters the PSM;
if the periodic TAU/TRU timer is overtime, the terminal exits the PSM;
wherein the activation timer AT is determined by a mobility management entity MME according to the power consumption of the terminal; the negotiation and determination of the activation timer AT and the MME through a non-access stratum message NAS by the terminal according to the power consumption of the terminal comprises the following steps:
if (P _ wake _ n +1 × T _ wake _ n +1) + (Pm _ n × Tm _ n) is less than or equal to P _ total/K, said mobility management entity MME adjusting said activation timer AT;
wherein K is a high power proportionality coefficient, and K is more than or equal to 2; the P _ total is the original power consumption calculated by taking the nth task and the (n +1) th task as a set;
P_total＝(P_wake_n*T_wake_n)+(Pm_n*Tm_n)+(P_idle_n*T_idle_n)+(P_psm_n*T_psm_n)+(P_wake_n+1*T_wake_n+1)+(Pm_n+1*Tm_n+1)+(P_idle_n+1*T_idle_n+1)
the power consumption of the terminal in the sleep mode is awakened when the terminal is in the (n +1) th task; t _ wake _ n +1 is the time length of the terminal in the sleep mode when the terminal is in the (n +1) th task; p _ wake _ n is the power consumption of the terminal in the sleep mode when the terminal is in the nth task; t _ wake _ n is the time length of the terminal in the nth task in the sleep mode; pm _ n is the power consumption of the terminal in the connection mode during the nth task; tm _ n is the time length of the terminal in a connection mode during the nth task; pm _ n +1 is the power consumption of the terminal in the connection mode when the terminal is in the (n +1) th task; tm _ n +1 is the time length of the terminal in the connection mode when the terminal is in the (n +1) th task; p _ idle _ n is the power consumption of the terminal in an idle mode during the nth task; t _ idle _ n is the time length of the terminal in an idle mode during the nth task; p _ idle _ n +1 is the power consumption of the terminal in an idle mode when the terminal is in the (n +1) th task; t _ idle _ n +1 is the time length of the terminal in an idle mode when the terminal is in the (n +1) th task; p _ PSM _ n is the power consumption of the terminal in the PSM mode when the terminal is in the nth task; and T _ PSM _ n is the time length of the terminal in the PSM mode at the nth task.
2. The terminal power saving method of claim 1, wherein the Mobility Management Entity (MME) adjusts the Activation Timer (AT) and comprises:
if (P _ wake _ n + 1T _ wake _ n +1) + (Pm _ n Tm _ n) is less than or equal to P _ total/K, according to the formula Timer_m＝Timer_m-1-(m*Tstep) Adjusting the activation timer AT;
wherein m is the adjustment times of the activation Timer AT, Timer_mTimer is the result of the m-th adjustment of the activation Timer AT_m-1The m is not less than 0 and is an integer, and the result is the m-1 adjustment of the activation timer AT; t isstepAn adjustment step size for the activation timer AT.
3. The terminal power saving method according to claim 1 or 2,
and if the terminal needs to send the MO data, the terminal exits the PSM.
4. A terminal power saving system, characterized by comprising,
a terminal, configured to start an activation timer AT of a power saving mode PSM if the terminal enters an idle mode from a connected mode;
if the AT is overtime, exiting the idle mode and entering the PSM; and the number of the first and second groups,
if the periodic TAU/TRU timer is overtime, exiting the PSM;
a mobility management entity MME, configured to determine the activation timer AT according to power consumption of the terminal; the determining, by the MME, the activation timer AT through a non-access stratum NAS message and the power consumption negotiation of the terminal according to the power consumption of the terminal includes:
if (P _ wake _ n +1 × T _ wake _ n +1) + (Pm _ n × Tm _ n) is less than or equal to P _ total/K, said mobility management entity MME adjusting said activation timer AT;
wherein K is a high power proportionality coefficient, and K is more than or equal to 2; the P _ total is the original power consumption calculated by taking the nth task and the (n +1) th task as a set;
P_total＝(P_wake_n*T_wake_n)+(Pm_n*Tm_n)+(P_idle_n*T_idle_n)+(P_psm_n*T_psm_n)+(P_wake_n+1*T_wake_n+1)+(Pm_n+1*Tm_n+1)+(P_idle_n+1*T_idle_n+1)
the power consumption of the terminal in the sleep mode is awakened when the terminal is in the (n +1) th task; t _ wake _ n +1 is the time length of the terminal in the sleep mode when the terminal is in the (n +1) th task; p _ wake _ n is the power consumption of the terminal in the sleep mode when the terminal is in the nth task; t _ wake _ n is the time length of the terminal in the nth task in the sleep mode; pm _ n is the power consumption of the terminal in the connection mode during the nth task; tm _ n is the time length of the terminal in a connection mode during the nth task; pm _ n +1 is the power consumption of the terminal in the connection mode when the terminal is in the (n +1) th task; tm _ n +1 is the time length of the terminal in the connection mode when the terminal is in the (n +1) th task; p _ idle _ n is the power consumption of the terminal in an idle mode during the nth task; t _ idle _ n is the time length of the terminal in an idle mode during the nth task; p _ idle _ n +1 is the power consumption of the terminal in an idle mode when the terminal is in the (n +1) th task; t _ idle _ n +1 is the time length of the terminal in an idle mode when the terminal is in the (n +1) th task; p _ PSM _ n is the power consumption of the terminal in the PSM mode when the terminal is in the nth task; and T _ PSM _ n is the time length of the terminal in the PSM mode at the nth task.
5. The terminal power saving system of claim 4, wherein the mobility management entity MME adjusts the activation timer AT, comprising:
if (P _ wake _ n + 1T _ wake _ n +1) + (Pm _ n Tm _ n) is less than or equal to P _ total/K, according to the formula Timer_m＝Timer_m-1-(m*Tstep) Adjusting the activation timer AT;
wherein m is the adjustment times of the activation Timer AT, Timer_mFor said activating timerThe result of the AT after the mth adjustment, Timer_m-1The m is not less than 0 and is an integer, and the result is the m-1 adjustment of the activation timer AT; t isstepAn adjustment step size for the activation timer AT.
6. The terminal power saving system according to claim 4 or 5,
and if the terminal needs to send the MO data, the terminal exits the PSM.
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| CN110278601B (en) * | 2019-04-30 | 2022-02-15 | 中国联合网络通信集团有限公司 | Terminal power saving method and device |
| CN111338459B (en) * | 2020-02-10 | 2021-03-23 | 重庆物奇科技有限公司 | NB-IoT system PSM mode control method and system |
| CN111711980B (en) * | 2020-04-30 | 2023-04-18 | 国网浙江省电力有限公司嘉兴供电公司 | Method for reducing power consumption of drive test terminal |
| CN112218359B (en) * | 2020-11-18 | 2023-02-21 | 中国联合网络通信集团有限公司 | Method and device for setting time length of timer |
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