CN109246809A - A kind of terminal power saving method and system - Google Patents
A kind of terminal power saving method and system Download PDFInfo
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- CN109246809A CN109246809A CN201811270690.7A CN201811270690A CN109246809A CN 109246809 A CN109246809 A CN 109246809A CN 201811270690 A CN201811270690 A CN 201811270690A CN 109246809 A CN109246809 A CN 109246809A
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- terminal
- wake
- timer
- idle
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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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- Computer Networks & Wireless Communication (AREA)
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- Mobile Radio Communication Systems (AREA)
Abstract
The invention discloses a kind of terminal power saving method and system, are related to field of communication technology.The present invention passes through the power consumption of computing terminal and is reported to mobile management entity MME by non-access layer information NAS message, decide whether to be adjusted the Active Timer AT of power saving mode PSM according to the power consumption by mobile management entity MME, and how to adjust, so as to reasonably adjust Active Timer AT according to the actual power consumption situation dynamic of terminal, the power consumption problem of terminal is substantially reduced.
Description
Technical field
The present invention relates to field of communication technology more particularly to a kind of terminal power saving method and system.
Background technique
Currently, being based on cellular narrowband Internet of Things (Narrow Band Internet of Things, NB-IoT) conduct
Based on the technology of Internet of things of 3GPP LTE standard agreement evolution, it is mainly directed towards middle low rate, depth covering, low-power consumption, big connection
Internet of Things application scenarios, have frequency spectrum resource utilization rate it is high, can depth covering, low in energy consumption and can support that low speed are used in a large amount of
The advantages that family.
With the fast development of intelligent terminal, the supported application scenarios of terminal are more and more, when in use the consumption of terminal
Electricity is also getting faster.In NB-IoT network, terminal relies primarily on power saving mode (Power Saving Mode, PSM) mechanism
Suspend mode is realized with extended pattern discontinuous reception (extended Discontinuous Reception, eDRX) mechanism, to subtract
The power consumption of few terminal, specifically, only needing to send mobile initial data (Mobile in UE after UE enters PSM mode
Original, MO), or after periodicity TAU/TRU timer expiry, can just exit PSM mode.Even if UE movement causes TA to become
Change, PSM mode will not be exited, network side can control UE in PSM mould by configuring periodical TAU/TRU timer duration
The time of formula.However, in existing NB-IoT network, if periodicity TAU/TRU timer setting is unreasonable, the power consumption of terminal
It measures still bigger.
Summary of the invention
The embodiment of the present invention provides a kind of terminal power saving method, can substantially reduce terminal by the way that timer is rationally arranged
Power consumption.
In order to achieve the above objectives, the embodiment of the present invention provides a kind of terminal power saving method, is applied to terminal power saving system,
The described method includes:
If terminal enters idle mode, the Active Timer AT of startup power save mode PSM from connection mode；
If the Active Timer AT time-out, the terminal exits from idle mode, into PSM；
If periodicity TAU/TRU timer expiry, the terminal exit PSM；
Wherein, the Active Timer AT is determined by mobile management entity MME according to the power consumption of the terminal.
Accordingly, the embodiment of the invention also provides a kind of terminal power saving system, the system comprises terminals and moving tube
Manage entity MME；
The terminal, if entering idle mode from connection mode for the terminal, startup power save mode PSM's swashs
Active timer AT；
If the Active Timer AT time-out, exits from idle mode, into PSM；And
If periodicity TAU/TRU timer expiry, exits PSM；
The mobile management entity MME, for determining the Active Timer AT according to the power consumption of the terminal.
The present invention passes through the power consumption of computing terminal and is reported to mobile management entity by non-access layer information NAS message
MME is decided whether to carry out the Active Timer AT of power saving mode PSM by mobile management entity MME according to the power consumption
Adjustment, and how to adjust, so as to reasonably adjust Active Timer AT according to the actual power consumption situation dynamic of terminal, greatly
The big power consumption problem for reducing terminal.
Detailed description of the invention
To describe the technical solutions in the embodiments of the present invention more clearly, make required in being described below to embodiment
Attached drawing is briefly described, it should be apparent that, drawings in the following description are only some embodiments of the invention, for
For those of ordinary skill in the art, without creative efforts, it can also be obtained according to these attached drawings other
Attached drawing.
Fig. 1 is network architecture schematic diagram of the terminal power saving system in LTE network implementation environment of the embodiment of the present invention；
Fig. 2 is that the mode of PSM of embodiment of the present invention mechanism realizes schematic diagram
Fig. 3 is the flow chart of the terminal power saving method of the embodiment of the present invention；
Fig. 4 is the terminal power saving system structure diagram of the embodiment of the present invention.
Specific embodiment
Following will be combined with the drawings in the embodiments of the present invention, and technical solution in the embodiment of the present invention carries out clear, complete
Site preparation description, it is clear that described embodiments are only a part of the embodiments of the present invention, instead of all the embodiments.It is based on
Embodiment in the present invention, it is obtained by those of ordinary skill in the art without making creative efforts every other
Embodiment shall fall within the protection scope of the present invention.
As shown in Figure 1, the network architecture for showing terminal power saving system of the invention in LTE network implementation environment is illustrated
Figure.The network architecture diagram of the implementation environment includes terminal, eNodeB, IoT core net, IoT platform and application server, wherein
Terminal is by eating dishes without rice or wine to be connected to eNodeB；ENodeB undertakes access processing of eating dishes without rice or wine, the correlation functions such as cell management, and is connect by S1
Mouth is attached with IoT core net, gives Non-Access Stratum data forwarding to high-rise network element processing；IoT core net undertakes non-with terminal
The function of access layer interaction, and IoT service related data is forwarded to IoT platform and is handled.IoT platform is for converging from each
The IoT data that kind access net obtains, and corresponding service application device is forwarded to according to different type and is handled.Application server
It is the final convergent point of IoT data, for carrying out the operation such as data processing according to the demand of client.Shown in FIG. 1 is only to illustrate
Figure does not constitute the interaction of other units of the network architecture and each unit and limits.
Since 3GPP provides the promotion that NB-IoT needs to have 20dB than GPRS in terms of covering, to support three kinds of coverings etc.
Grade: MCL 144dB, MCL 154dB and MCL 164dB, wherein MCL is minimum coupling loss (Minimum Coupling
Loss), for indicating the smallest coupling loss between the emitting portion of base station and mobile phone, receiving portion.
NB-IoT downlink enhances covering by way of Data duplication, and uplink passes through Data duplication, promotion uplink power
The mode of spectrum density covers to enhance.Specifically, can be three kinds of grades by overlay defining:
Covering grade 0 (CEL0): MCL is less than 144dB；
Covering grade 1 (CEL1): MCL is less than 154dB；
Covering grade 2 (CEL2): MCL is less than 164dB.
Under each covering grade, random access narrowband Physical Random Access Channel (Narrowband Physical
Random Access Channel, NPRACH) the fix information number of repetition of the covering grade, the fix information can be set
The setting rule of number of repetition can be with are as follows: fix information number of repetition increases with the raising of covering grade.When user is at certain
When accessing network under one covering grade, terminal can be accessed with the fix information number of repetition being arranged under the covering grade, if should
Number, which reaches the maximum of base station side setting, to be attempted after accessing number, and when still can not access, terminal can increase its covering grade
Attempt to access to higher level-one, due to fix information number of repetition is the raising with covering grade and increased, terminal
Increase covering grade after, can increase information number of repetition carry out random access, in this way, can greatly improve with
The probability that machine is successfully accessed.
And due to Data duplication and promoted upstream power spectrum density mechanism introducing, for terminal power consumption necessarily
Therefore one big challenge in NB-IoT network, introduces PSM mechanism and realizes suspend mode, to reduce the power consumption of terminal.Such as Fig. 2
It is shown, it shows the mode of PSM mechanism of the embodiment of the present invention and realizes schematic diagram, the PSM mechanism includes four kinds of modes: connection
Mode (Connected), idle mode (Idle), power saving mode (PSM) and wake-up sleep pattern (Wake).In general, four
The power relation of kind mode are as follows: connection mode > idle mode > wakes up sleep pattern > power saving mode.
The embodiment of the present invention provides a kind of terminal power saving method, as shown in figure 3, showing terminal power saving method of the invention
Flow chart, the method are applied to use terminal power saving system, and the method specifically includes:
If S101, terminal enter idle mode, the Active Timer AT of startup power save mode PSM from connection mode.
Wherein, the Active Timer AT is determined by mobile management entity MME according to the power consumption of the terminal.
Terminal will start the Active Timer AT of power saving mode PSM, institute when entering idle mode by connection mode
Stating Active Timer AT can be negotiated to determine by terminal and mobile management entity MME by non-access layer information NAS message.
If S102, the Active Timer AT are overtime, the terminal exits from idle mode, into PSM.
At the idling mode, if the Active Timer AT is overtime, mobile management entity MME determines that terminal enters to terminal
PSM, in this mode, terminal deactivate its random access access layer (AS) function, and network side refuses downlink business and paging, eventually
End stops the function under the idle mode, such as carries out cell selection, so as to save the electricity of terminal.
If S103, periodicity TAU/TRU timer expiry, the terminal exit PSM.
If periodicity TAU/TRU timer expiry, terminal restores its random access access layer (AS) function, meanwhile, network
Downlink business and paging are restored in side, and therefore, terminal restores the function under idle mode.
Network side can by configure periodical TAU/TRU timer duration come controlling terminal PSM mode time.Tool
Body, how network side carries out periodical TAU/TRU timer configuration and what carries out periodicity TAU/TRU timer according to
Configuration, the embodiment of the present invention is without limiting.
Further, if the terminal needs to send MO data, the terminal exits PSM.
Specifically, needing to carry out MO communication initialization if terminal initiates MO (mobile originating) communication
MO data are sent, terminal can exit PSM, activate random access access layer (AS) function.
Further, the Active Timer AT passes through Non-Access Stratum by the terminal according to the power consumption of the terminal
Message NAS message and the mobile management entity MME negotiate to determine.
Specifically, if (P_wake_n+1*T_wake_n+1)+(Pm_n*Tm_n)≤? P_total/K, the mobile management
Entity MME adjusts the Active Timer AT；
Wherein, K is high power proportionality coefficient, K >=2；Wherein, P_total is to be with n-th task and the (n+1)th subtask
One set, the raw electricity consumption amount of calculating；
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)
Wherein, P_wake_n+1 is the terminal in the (n+1)th subtask, wakes up the power consumption under sleep pattern；T_wake_
N+1 is the terminal in the (n+1)th subtask, wakes up the time span under sleep pattern；P_wake_n is the terminal n-th
When subtask, the power consumption under sleep pattern is waken up；T_wake_n is the terminal in n-th task, is waken up under sleep pattern
Time span；Pm_n is power consumption of the terminal in n-th task, under connection mode；Tm_n is the terminal in n-th
Time span when task, under connection mode；Pm_n+1 is power consumption of the terminal in n-th task, under connection mode；
Tm_n+1 is time span of the terminal in n-th task, under connection mode；P_idle_n is the terminal in n-th
Power consumption when task, under idle mode；T_idle_n is time span of the terminal in n-th task, under idle mode；
P_idle_n+1 is power consumption of the terminal in the (n+1)th subtask, under idle mode；T_idle_n+1 is the terminal the
Time span when n+1 subtask, under idle mode；P_psm_n is function of the terminal in n-th task, under PSM mode
Consumption；T_psm_n is time span of the terminal in n-th task, under PSM mode.
Further, the mobile management entity MME adjusts the Active Timer AT, comprising:
(if P_wake_n+1*T_wake_n+1)+(Pm_n*Tm_n)≤? P_total/K, according to formula Timer_m=
Timer_m-1-(m*Tstep) the adjustment Active Timer AT；
Wherein, m is the adjustment number of the Active Timer AT, Timer_mIt is adjusted for described Active Timer AT the m times
Afterwards as a result, Timer_m-1It is adjusted as a result, m >=0, m are integer for described Active Timer AT the m-1 times；TstepIt is described
The adjusting step of Active Timer AT.
The adjusting step according to Active Timer AT that mobile management entity MME can continue adjusts Active Timer AT
It is whole, until satisfaction (P_wake_n+1*T_wake_n+1)+(Pm_n*Tm_n) > P_total/K, stop to the activation timing
The adjustment of device AT, using Active Timer AT adjusted as new Active Timer AT, control is turned by idle mode to PSM
It changes.
Wherein, the initial value Timer of Active Timer AT_0It can be passed through by terminal and mobile management entity MME non-access
Layer message NAS message negotiation is configured, specifically, how to be configured and be configured according to what rule, the present invention
Embodiment is without limiting.
The present invention passes through the power consumption of computing terminal and is reported to mobile management entity by non-access layer information NAS message
MME is decided whether to carry out the Active Timer AT of power saving mode PSM by mobile management entity MME according to the power consumption
Adjustment, and how to adjust, so as to reasonably adjust Active Timer AT according to the actual power consumption situation dynamic of terminal, greatly
The big power consumption problem for reducing terminal.
The embodiment of the present invention provides a kind of terminal power saving system, as shown in figure 4, showing terminal power saving system of the invention
20, the terminal power saving system 20 includes terminal 210 and mobile management entity MME 220.Those of ordinary skill in the art can be with
Understand, shown in Fig. 4 is only schematic diagram, not to other units of the terminal power saving system and the terminal power saving system and other
The interaction of net unit, which is constituted, to be limited.
Terminal 210, if entering idle mode from connection mode for the terminal, startup power save mode PSM's swashs
Active timer AT.
Wherein, the Active Timer AT is determined by mobile management entity MME according to the power consumption of the terminal.
Terminal 210 is also used to, if the Active Timer AT is overtime, is exitted from idle mode, into PSM；And
If periodicity TAU/TRU timer expiry, exits PSM.
Specifically, terminal is at the idling mode, if the Active Timer AT is overtime, mobile management entity MME determines eventually
End enters PSM, and in this mode, terminal deactivates its random access access layer (AS) function, network side refuse downlink business and
Paging, terminal stops the function under the idle mode, such as carries out cell selection, so as to save the electricity of terminal.
If periodicity TAU/TRU timer expiry, terminal restores its random access access layer (AS) function, meanwhile, network
Downlink business and paging are restored in side, and therefore, terminal restores the function under idle mode.
Network side can by configure periodical TAU/TRU timer duration come controlling terminal PSM mode time.Tool
Body, how network side carries out periodical TAU/TRU timer configuration and what carries out periodicity TAU/TRU timer according to
Configuration, the embodiment of the present invention is without limiting.
Further, if the terminal needs to send MO data, the terminal exits PSM.
Specifically, needing to carry out MO communication initialization if terminal initiates MO (Mobile Originating) communication
MO data are sent, terminal can exit PSM, activate random access access layer (AS) function.
Mobile management entity MME 220, for determining the Active Timer AT according to the power consumption of the terminal.
Specifically, terminal when entering idle mode by connection mode, will start the activation timing of power saving mode PSM
Device AT, the Active Timer AT can be negotiated by terminal and mobile management entity MME by non-access layer information NAS message true
It is fixed.
Further, the Active Timer AT passes through Non-Access Stratum by the terminal according to the power consumption of the terminal
Message NAS message and the mobile management entity MME negotiate to determine.
Specifically, if (P_wake_n+1*T_wake_n+1)+(Pm_n*Tm_n)≤? P_total/K, the mobile management
Entity MME adjusts the Active Timer AT；
Wherein, K is high power proportionality coefficient, K >=2；Wherein, P_total is to be with n-th task and the (n+1)th subtask
One set, the raw electricity consumption amount of calculating；
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)
Wherein, P_wake_n+1 is the terminal in the (n+1)th subtask, wakes up the power consumption under sleep pattern；T_wake_
N+1 is the terminal in the (n+1)th subtask, wakes up the time span under sleep pattern；P_wake_n is the terminal n-th
When subtask, the power consumption under sleep pattern is waken up；T_wake_n is the terminal in n-th task, is waken up under sleep pattern
Time span；Pm_n is power consumption of the terminal in n-th task, under connection mode；Tm_n is the terminal in n-th
Time span when task, under connection mode；Pm_n+1 is power consumption of the terminal in n-th task, under connection mode；
Tm_n+1 is time span of the terminal in n-th task, under connection mode；P_idle_n is the terminal in n-th
Power consumption when task, under idle mode；T_idle_n is time span of the terminal in n-th task, under idle mode；
P_idle_n+1 is power consumption of the terminal in the (n+1)th subtask, under idle mode；T_idle_n+1 is the terminal the
Time span when n+1 subtask, under idle mode；P_psm_n is function of the terminal in n-th task, under PSM mode
Consumption；T_psm_n is time span of the terminal in n-th task, under PSM mode.
Further, the mobile management entity MME adjusts the Active Timer AT, comprising:
(if P_wake_n+1*T_wake_n+1)+(Pm_n*Tm_n)≤? P_total/K, according to formula Timer_m=
Timer_m-1-(m*Tstep) the adjustment Active Timer AT；
Wherein, m is the adjustment number of the Active Timer AT, Timer_mIt is adjusted for described Active Timer AT the m times
Afterwards as a result, Timer_m-1It is adjusted as a result, m >=0, m are integer for described Active Timer AT the m-1 times；TstepIt is described
The adjusting step of Active Timer AT.
The adjusting step according to Active Timer AT that mobile management entity MME can continue adjusts Active Timer AT
It is whole, until satisfaction (P_wake_n+1*T_wake_n+1)+(Pm_n*Tm_n) > P_total/K, stop to the activation timing
The adjustment of device AT, using Active Timer AT adjusted as new Active Timer AT, control is turned by idle mode to PSM
It changes.
Wherein, the initial value Timer of Active Timer AT_0It can be passed through by terminal and mobile management entity MME non-access
Layer message NAS message negotiation is configured, specifically, how to be configured and be configured according to what rule, the present invention
Embodiment is without limiting.
The present invention passes through the power consumption of computing terminal and is reported to mobile management entity by non-access layer information NAS message
MME is decided whether to carry out the Active Timer AT of power saving mode PSM by mobile management entity MME according to the power consumption
Adjustment, and how to adjust, so as to reasonably adjust Active Timer AT according to the actual power consumption situation dynamic of terminal, greatly
The big power consumption problem for reducing terminal.
In several embodiments provided herein, it should be understood that disclosed method and system can pass through it
Its mode is realized.For example, system embodiment described above is only schematical, for example, the functional module is drawn
Point, only a kind of logical function partition, there may be another division manner in actual implementation, such as multiple units or components can
To combine or be desirably integrated into another system, or some features can be ignored or not executed.Another point, it is shown or beg for
The mutual coupling, direct-coupling or communication connection of opinion can be through some interfaces, the INDIRECT COUPLING of device or unit
Or communication connection, it can be electrical property, mechanical or other forms.
The unit as illustrated by the separation member may or may not be physically separated, aobvious as unit
The component shown may or may not be physical unit, it can and it is in one place, or may be distributed over multiple
In network unit.It can select some or all of unit therein according to the actual needs to realize the mesh of this embodiment scheme
's.
It, can also be in addition, each functional module in each embodiment of the present invention can integrate in one processing unit
It is that the independent physics of each unit includes, can also be integrated in one unit with two or more units.Above-mentioned integrated list
Member both can take the form of hardware realization, can also realize in the form of hardware adds SFU software functional unit.
The above-mentioned integrated unit being realized in the form of SFU software functional unit can store and computer-readable deposit at one
In storage media.Above-mentioned SFU software functional unit is stored in a storage medium, including some instructions are used so that a computer
Equipment (can be personal computer, server or the network equipment etc.) executes the portion of each embodiment the method for the present invention
Step by step.And storage medium above-mentioned includes: USB flash disk, mobile hard disk, read-only memory (Read-Only Memory, abbreviation
ROM), random access memory (Random Access Memory, abbreviation RAM), magnetic or disk etc. are various can store
The medium of program code.
The above description is merely a specific embodiment, but scope of protection of the present invention is not limited thereto, any
Those familiar with the art in the technical scope disclosed by the present invention, can easily think of the change or the replacement, and should all contain
Lid is within protection scope of the present invention.Therefore, protection scope of the present invention should be based on the protection scope of the described claims.
Claims (10)
1. a kind of terminal power saving method, which is characterized in that the terminal power saving method includes,
If terminal enters idle mode, the Active Timer AT of startup power save mode PSM from connection mode；
If the Active Timer AT time-out, the terminal exits from idle mode, into PSM；
If periodicity TAU/TRU timer expiry, the terminal exit PSM；
Wherein, the Active Timer AT is determined by mobile management entity MME according to the power consumption of the terminal.
2. terminal power saving method according to claim 1, which is characterized in that the Active Timer AT is by the terminal root
According to the power consumption of the terminal, negotiate to determine by non-access layer information NAS message and the mobile management entity MME.
3. the terminal power saving method stated according to claim 2, which is characterized in that the Active Timer AT by the terminal according to
The power consumption of the terminal is negotiated to determine by non-access layer information NAS message and the mobile management entity MME, comprising:
(if P_wake_n+1*T_wake_n+1)+(Pm_n*Tm_n)≤? P_total/K, the mobile management entity MME adjustment
The Active Timer AT；
Wherein, K is high power proportionality coefficient, K >=2；Wherein, it is one that P_total, which is with n-th task and the (n+1)th subtask,
Set, the raw electricity consumption amount of calculating；
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)
Wherein, P_wake_n+1 is the terminal in the (n+1)th subtask, wakes up the power consumption under sleep pattern；T_wake_n+1
It is the terminal in the (n+1)th subtask, wakes up the time span under sleep pattern；P_wake_n is the terminal in n-th
When task, the power consumption under sleep pattern is waken up；T_wake_n is the terminal in n-th task, is waken up under sleep pattern
Time span；Pm_n is power consumption of the terminal in n-th task, under connection mode；Tm_n is that the terminal is appointed in n-th
Time span when business, under connection mode；Pm_n+1 is power consumption of the terminal in n-th task, under connection mode；Tm_n
+ 1 is time span of the terminal in n-th task, under connection mode；P_idle_n is the terminal in n-th task
When, the power consumption under idle mode；T_idle_n is time span of the terminal in n-th task, under idle mode；P_
Idle_n+1 is power consumption of the terminal in the (n+1)th subtask, under idle mode；T_idle_n+1 be the terminal n-th+
Time span when 1 subtask, under idle mode；P_psm_n is function of the terminal in n-th task, under PSM mode
Consumption；T_psm_n is time span of the terminal in n-th task, under PSM mode.
4. terminal power saving method according to claim 3, which is characterized in that described in the mobile management entity MME adjustment
Active Timer AT, comprising:
(if P_wake_n+1*T_wake_n+1)+(Pm_n*Tm_n)≤? P_total/K, according to formula Timer_m=
Timer_m-1-(m*Tstep) the adjustment Active Timer AT；
Wherein, m is the adjustment number of the Active Timer AT, Timer_mIt is adjusted for described Active Timer AT the m times
As a result, Timer_m-1It is adjusted as a result, m >=0, m are integer for described Active Timer AT the m-1 times；TstepFor the activation
The adjusting step of timer AT.
5. terminal power saving method according to claim 1-4, which is characterized in that
If the terminal needs to send MO data, the terminal exits PSM.
6. a kind of terminal power saving system, which is characterized in that the terminal power saving system includes,
Terminal, if entering idle mode, the Active Timer of startup power save mode PSM from connection mode for the terminal
AT；
If the Active Timer AT time-out, exits from idle mode, into PSM；And
If periodicity TAU/TRU timer expiry, exits PSM；
Mobile management entity MME, for determining the Active Timer AT according to the power consumption of the terminal.
7. terminal power saving system according to claim 6, which is characterized in that described to be determined according to the power consumption of the terminal
The Active Timer AT, comprising:
The mobile management entity MME is by non-access layer information NAS message with the terminal according to the power consumption of the terminal
Negotiate to determine the Active Timer AT.
8. the terminal power saving system stated according to claim 7, which is characterized in that the mobile management entity MME passes through non-access
Layer message NAS message and the terminal negotiate to determine the Active Timer AT according to the power consumption of the terminal, comprising:
(if P_wake_n+1*T_wake_n+1)+(Pm_n*Tm_n)≤? P_total/K, the mobile management entity MME adjustment
The Active Timer AT；
Wherein, K is high power proportionality coefficient, K >=2；Wherein, it is one that P_total, which is with n-th task and the (n+1)th subtask,
Set, the raw electricity consumption amount of calculating；
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)
Wherein, P_wake_n+1 is the terminal in the (n+1)th subtask, wakes up the power consumption under sleep pattern；T_wake_n+1
It is the terminal in the (n+1)th subtask, wakes up the time span under sleep pattern；P_wake_n is the terminal in n-th
When task, the power consumption under sleep pattern is waken up；T_wake_n is the terminal in n-th task, is waken up under sleep pattern
Time span；Pm_n is power consumption of the terminal in n-th task, under connection mode；Tm_n is that the terminal is appointed in n-th
Time span when business, under connection mode；Pm_n+1 is power consumption of the terminal in n-th task, under connection mode；Tm_n
+ 1 is time span of the terminal in n-th task, under connection mode；P_idle_n is the terminal in n-th task
When, the power consumption under idle mode；T_idle_n is time span of the terminal in n-th task, under idle mode；P_
Idle_n+1 is power consumption of the terminal in the (n+1)th subtask, under idle mode；T_idle_n+1 be the terminal n-th+
Time span when 1 subtask, under idle mode；P_psm_n is function of the terminal in n-th task, under PSM mode
Consumption；T_psm_n is time span of the terminal in n-th task, under PSM mode.
9. the terminal power saving system stated according to claim 7, which is characterized in that the mobile management entity MME adjustment is described to swash
Active timer AT, comprising:
(if P_wake_n+1*T_wake_n+1)+(Pm_n*Tm_n)≤? P_total/K, according to formula Timer_m=
Timer_m-1-(m*Tstep) the adjustment Active Timer AT；
Wherein, m is the adjustment number of the Active Timer AT, Timer_mIt is adjusted for described Active Timer AT the m times
As a result, Timer_m-1It is adjusted as a result, m >=0, m are integer for described Active Timer AT the m-1 times；TstepFor the activation
The adjusting step of timer AT.
10. according to the described in any item terminal power saving systems of claim 6-9, which is characterized in that
If the terminal needs to send MO data, the terminal exits PSM.
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