CN111372304B - Power-saving NB-IoT chip and NB-IoT power-saving method - Google Patents
Power-saving NB-IoT chip and NB-IoT power-saving method Download PDFInfo
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- CN111372304B CN111372304B CN202010112365.9A CN202010112365A CN111372304B CN 111372304 B CN111372304 B CN 111372304B CN 202010112365 A CN202010112365 A CN 202010112365A CN 111372304 B CN111372304 B CN 111372304B
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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
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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
- H04W52/0212—Power saving arrangements in terminal devices managed by the network, e.g. network or access point is master and terminal is slave
- H04W52/0216—Power saving arrangements in terminal devices managed by the network, e.g. network or access point is master and terminal is slave using a pre-established activity schedule, e.g. traffic indication frame
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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
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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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- 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
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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
Abstract
The invention relates to the technical field of NB-IoT networks, in particular to a power-saving NB-IoT chip, a power-saving device and an NB-IoT power-saving method, wherein the device comprises a processor with a plurality of cores, a protocol stack and a physical layer, wherein the protocol stack and the physical layer run on the processor, and the power-saving NB-IoT chip and the power-saving device are characterized in that: the protocol stack and the physical layer run on different cores of the processor, respectively. The NB-IoT power saving method is based on the device and comprises the following contents: in a data processing task needing to be processed by the physical layer and the protocol stack together, the physical layer receives data and then independently processes and analyzes the data, judges whether the data needs to be submitted to the protocol stack for processing, if so, wakes up a core where the protocol stack is located and submits the data, and if not, does not wake up the protocol stack. The data processing task comprises one or more of paging information processing, measurement reselection processing and hybrid retransmission processing. The power-saving NB-IoT chip, the power-saving NB-IoT device and the power-saving NB-IoT method can reduce the power consumption of NB-IoT equipment and improve the cruising ability of the equipment.
Description
Technical Field
The invention relates to the technical field of NB-IoT networks, in particular to a power-saving NB-IoT chip and a power-saving NB-IoT method.
Background
Different from the standard commonly used by LTE and other mobile phones, the application scene of the NB-IOT standard is in a non-working state most of the time, and is in a working state a few of the time, and whether the non-working state can be fully utilized to enter a proper dormant state or not becomes a key for reducing the comprehensive power consumption of the system to the minimum or not.
In a conventional NB-IOT scheme, a physical layer and a protocol stack are both in a single core mode, and during processing of paging information, measurement reselection processing, hybrid retransmission processing, and the like, the physical layer needs to repeatedly notify the protocol stack to process data, for example, during the paging processing, after receiving paging information, the physical layer only needs to analyze a PDU data packet and transmit the PDU data packet to the protocol stack, and whether the paging information included in the PDU analyzed by the protocol stack is the paging information that the terminal determines whether to perform an access operation or not is determined. In the prior art, the physical layer and the protocol stack work simultaneously in the processing processes, which generates unnecessary operation consumption and is not beneficial to power saving.
Disclosure of Invention
The invention provides a power-saving NB-IoT chip and a power-saving method of NB-IoT, which can solve the problems that in the prior art, because a physical layer and a protocol stack work simultaneously, unnecessary operation consumption is easy to generate, and power saving is not facilitated.
The application provides the following technical scheme:
a power-saving NB-IoT device includes a processor having multiple cores, and further includes a protocol stack and a physical layer running on the processor, the protocol stack and the physical layer running on different cores of the processor, respectively.
In the technical scheme of the invention, the physical layer and the protocol stack are respectively arranged in different processor cores, and when one of the processor cores works, the other processor core does not need to be awakened, and the task allocation can ensure that the power consumption of each core can be lower than that of a single core of a single-core scheme.
Further, the present application also discloses an NB-IoT power saving method based on the above power saving NB-IoT device, which includes the following steps:
in a data processing task which needs to be processed by a physical layer and a protocol stack together, the physical layer receives data and then processes and analyzes the data independently, whether the data needs to be submitted to the protocol stack for processing is judged, if yes, a core where the protocol stack is located is awakened and the data is submitted, and if not, the protocol stack is not awakened.
The physical layer and the protocol stack are arranged in different cores, the physical layer is used for processing the data processing task independently, and the protocol stack is submitted to process when necessary, so that the calling of the protocol stack is reduced, the awakening frequency and the awakening time of the core where the protocol stack is located are reduced, the power consumption is reduced, and the endurance is improved.
Further, the data processing task includes one or more of paging information processing, measurement reselection processing, and hybrid retransmission processing. By optimizing and adjusting the processes of paging information processing, measurement and reselection processing, hybrid retransmission processing and the like, the awakening time of the core where the protocol stack is located is reduced, and low power consumption is realized.
Further, when the paging information processing is performed, the following is executed:
s100: the physical layer receives the paging information and analyzes the coding content;
s101: the physical layer judges whether the current data packet is system information change data or paging data, and if the current data packet is the system information change data, the physical layer wakes up a protocol stack and submits information; if yes, executing S102;
s102: and the physical layer judges whether the paging information is specific to the terminal, and if so, wakes up the protocol stack and submits the information.
After the paging information is received, the physical layer processes the paging information, and the physical layer judges whether the information is submitted to the protocol stack by itself, so that compared with the prior art, unnecessary calls to the protocol stack can be reduced, the protocol stack does not need to be called and awakened repeatedly, the protocol stack is more in a low-load state, the possibility of reducing the working frequency of a core where the protocol stack is located is provided, the power consumption is reduced, and the power consumption of NB-IoT equipment is further reduced.
Further, when performing the hybrid retransmission process, the following is performed:
s200: the physical layer judges whether the current data uplink is retransmitted or newly transmitted, if so, S201 is executed, and if so, S202 is executed;
s201: the physical layer acquires data from the cache to send, and finishes the uplink sending process;
s202: the physical layer submits the related information to a protocol stack;
s203: the protocol stack generates a protocol data unit according to the related information submitted by the physical layer and sends the protocol data unit to the physical layer;
s204: and the physical layer receives and sends the protocol data unit and finishes the uplink sending process.
When data goes up, whether new transmission or retransmission is carried out is judged by the physical layer, when the data is retransmitted, the physical layer directly obtains the data needing to be retransmitted from the cache to send the data without informing the protocol stack, and when the new transmission data is carried out, the data is processed by the protocol stack.
Further, the hybrid retransmission processing further includes the following contents:
s300: the physical layer judges whether the current downlink data is retransmitted or newly transmitted, if so, S301 is executed, and if so, S302 is executed;
s301: physically laminating and caching the data in the buffer memory, decoding the data, and executing S304;
s302: the physical layer directly decodes;
s304: and judging whether the decoding is correct or not, if so, submitting the decoded data to a protocol stack for processing.
When the data is downlink, the physical layer judges whether to retransmit or to newly transmit and makes a decision of direct decoding or combined decoding, and the protocol stack is not sent until the decoding is successful.
Further, when performing the measurement reselection process, the following is performed:
s400: the physical layer receives a downlink reference signal, and the protocol stack sleeps;
s401: the physical layer judges whether cell reselection is needed according to the downlink reference signal and a reselection formula, if so, S402 is executed, and if not, the measurement reselection process is finished;
s402: awakening a core where the protocol stack is located and submitting reselection information to the protocol stack;
s403: and the protocol stack initiates reselection according to the reselection information.
And the physical layer firstly processes and analyzes after receiving the downlink reference signal, judges whether a reselection condition is met, if not, does not awaken the core where the protocol stack is located to enable the core to be in a dormant state continuously, and if so, awakens the core where the protocol stack is located and informs the protocol stack to initiate reselection operation. Because most working scenes of the NB-IoT equipment are under static or low-speed motion, the reselection condition is not triggered most of the time, so that the core of the protocol stack is required to be awakened only a few times, the protocol stack has more time to be in a sleep state, and the power consumption is effectively reduced.
Further, the application also discloses a power-saving NB-IoT chip which is applied to the NB-IoT device and comprises a plurality of cores, wherein a protocol stack and a physical layer run on the cores, and the protocol stack and the physical layer run through different cores.
Further, the protocol stack and the physical layer run on a low power core. The low power core further reduces power consumption.
Further, the power-saving NB-IoT chip runs the processing tasks of the protocol stack and the physical layer according to the NB-IoT power-saving method.
Drawings
FIG. 1 is an architecture diagram of an embodiment of a power-saving NB-IoT chip according to the present invention;
FIG. 2 is a flowchart of a paging information processing procedure in an embodiment of an NB-IoT power saving method of the present invention;
fig. 3 is a flowchart of a hybrid retransmission process in an embodiment of an NB-IoT power saving method of the present invention;
fig. 4 is a flowchart of a measurement reselection process in an embodiment of an NB-IoT power saving method in the present invention.
Detailed Description
The following is further detailed by way of specific embodiments:
as shown in fig. 1, the power-saving NB-IoT chip of this embodiment is applied to the power-saving NB-IoT device of this application, and the device includes the chip, and a protocol stack and a physical layer running on the chip, where the protocol stack and the physical layer are located in different cores of the chip, that is, the physical layer and the protocol stack are run by different cores, and preferably, the protocol stack and the physical layer run on a low-power core, so as to further reduce power consumption. The power-saving NB-IoT chip and the power-saving NB-IoT device of the present embodiment run the processing tasks of the protocol stack and the physical layer using the following NB-IoT power saving method.
The method for saving power of NB-IoT is based on the NB-IoT device which saves power, and is mainly characterized in that in a data processing task which needs to be processed by a physical layer and a protocol stack together, the data is independently processed and analyzed after the physical layer receives the data, whether the data needs to be submitted to the protocol stack for processing is judged, if yes, a core where the protocol stack is located is awakened and the data is submitted, and if not, the protocol stack is not awakened.
Specifically, the data processing task includes one or more of paging information processing, measurement reselection processing, and hybrid retransmission processing, which are included in the present embodiment.
As shown in fig. 2, when the paging information processing is performed, the following is specifically performed:
s90: the protocol stack is dormant and the physical layer listens to the paging channel. Specifically, the physical layer calculates the paging time according to a formula specified by a protocol and monitors a paging channel according to the paging time.
S100: the physical layer receives paging information at the paging time and analyzes the asn.1 coding content of the paging information;
s101: the physical layer judges whether the current PDU data packet is system information change data or paging data, and if the current PDU data packet is the system information change data, the current PDU data packet is judged to be effective information; if paging, executing S202;
s102: the physical layer judges whether the paging information is specific to the terminal, if so, the paging information is judged to be valid information, and if not, the paging information is judged to be invalid information. Specifically, S102 includes:
s1021: the physical layer analyzes IE information in the paging information;
s1022: and the physical layer judges whether the IE is the same as the information of the terminal, if so, judges that the paging information is specific to the terminal, and otherwise, judges that the paging information is not specific to the terminal.
S103: and the protocol stack processes system information change data or initiates an access process according to the content submitted by the physical layer.
As shown in fig. 3, when performing the hybrid retransmission process, the following is performed:
s190: the physical layer receives the signal and analyzes the data; specifically, the physical layer in S190 receives the npdcch channel and parses out dci;
s191: the physical layer judges whether the current transmission is uplink transmission or downlink reception, and also judges which harq process the current transmission belongs to, if the current transmission is uplink transmission, S200 is executed; if the downlink reception is successful, S202 is executed.
S200: the physical layer judges whether the current data uplink is retransmitted or newly transmitted, if so, S201 is executed, and if so, S202 is executed;
s201: the physical layer acquires data from the corresponding cache of the harq process to send, and the uplink sending process is ended;
s202: the physical layer submits the size information of the transmission block, the harq process information and other related information to the protocol stack for processing.
S203: the protocol stack generates a protocol data unit according to the related information submitted by the physical layer and sends the protocol data unit to the physical layer;
s204: and the physical layer receives and transmits the protocol data unit and finishes the uplink transmission flow.
S300: the physical layer judges whether the current downlink data is retransmitted or newly transmitted, if so, executes S301, and if so, executes S302;
s301: the physical layer combines the data in the corresponding cache of the harq process, performs decoding by a hardware accelerator, and executes S204;
s302: the physical layer directly performs hardware accelerator decoding;
s304: and judging whether the decoding is correct or not, if so, sending the decoded data to a protocol stack.
As shown in fig. 4, when performing the measurement reselection process, the following is performed:
s400: the physical layer receives a downlink reference signal, and the protocol stack sleeps;
s401: the physical layer measures RSRP and RSRQ according to the downlink reference signals, then judges whether cell reselection is needed or not according to a reselection formula, if so, S402 is executed, and if not, the measurement reselection process is ended;
s402: awakening a core where the protocol stack is located and submitting reselection information to the protocol stack;
s403: and the protocol stack initiates reselection according to the reselection information.
The NB-IoT chip and the NB-IoT device in this embodiment have multiple operating modes and sleep modes, specifically, the operating modes include three operating modes, namely PSM, eDRX, and DRX, and each operating mode corresponds to multiple sleep modes; specifically, the following table shows:
in a DRX working mode, the sleep mode comprises a light sleep mode and a medium sleep mode, and in an eDRX mode, the sleep mode comprises a medium sleep mode and a deep sleep mode; in the PSM operation mode, the sleep mode includes a medium sleep mode and a deep sleep mode, and in other embodiments of the present application, the PSM operation mode may be set to directly enter the deep sleep state.
The specific hardware unit switching conditions corresponding to the respective sleep modes are shown in the following table:
the NB-IoT power saving method of the present embodiment further includes a sleep mode setting step, specifically, the step includes:
s10: setting time length thresholds corresponding to various sleep modes in various working modes;
s11: comparing the duration corresponding to the current working mode with a duration threshold value, and judging the sleep mode which the equipment should enter; in the scheme of this embodiment, the duration threshold of each sleep mode is set by evaluating the hardware wake-up duration of the mobile terminal, and the sleep mode to be set is finally determined according to the comparison between the current sleep duration and the duration threshold, so as to achieve the effect of saving power to the maximum extent.
The above are only examples of the present invention, and the present invention is not limited to the field related to the embodiments, the general knowledge of the specific structures and characteristics of the embodiments is not described herein, and those skilled in the art can know all the common technical knowledge in the technical field before the application date or the priority date, can know all the prior art in the field, and have the capability of applying the conventional experimental means before the application date, and those skilled in the art can combine the capabilities of themselves to complete and implement the present invention, and some typical known structures or known methods should not become obstacles for those skilled in the art to implement the present application. It should be noted that, for those skilled in the art, without departing from the structure of the present invention, several variations and modifications can be made, which should also be considered as the protection scope of the present invention, and these will not affect the effect of the implementation of the present invention and the utility of the patent. The scope of the claims of the present application shall be defined by the claims, and the description of the embodiments and the like in the specification shall be used to explain the contents of the claims.
Claims (6)
1. An NB-IoT power saving method based on a power saving NB-IoT device that includes a processor with multiple cores, a protocol stack and a physical layer running on the processor, characterized in that: the method comprises the following steps:
the protocol stack and the physical layer respectively run on different cores of the processor;
in a data processing task which needs to be processed by a physical layer and a protocol stack together, the physical layer receives data and then independently processes and analyzes the data, judges whether the data needs to be submitted to the protocol stack for processing, if so, wakes up a core where the protocol stack is located and submits the data, and if not, does not wake up the protocol stack;
the data processing task comprises one or more of paging information processing, measurement reselection processing and hybrid retransmission processing;
when the hybrid retransmission processing is performed, the following is executed:
s200: the physical layer judges whether the current data uplink is retransmitted or newly transmitted, if so, S201 is executed, and if so, S202 is executed;
s201: the physical layer acquires data from the cache to send, and finishes the uplink sending process;
s202: the physical layer submits the related information to a protocol stack;
s203: the protocol stack generates a protocol data unit according to the related information submitted by the physical layer and sends the protocol data unit to the physical layer;
s204: the physical layer receives and sends the protocol data unit, and finishes the uplink sending process;
the hybrid retransmission process further includes the following:
s300: the physical layer judges whether the current downlink data is retransmitted or newly transmitted, if so, S301 is executed, and if so, S302 is executed;
s301: physically laminating and caching the data in the buffer memory, decoding the data, and executing S304;
s302: the physical layer directly decodes;
s304: and judging whether the decoding is correct or not, if so, submitting the decoded data to a protocol stack for processing.
2. An NB-IoT power saving method in accordance with claim 1, wherein: when the paging information is processed, the following contents are executed:
s100: the physical layer receives the paging information and analyzes the coding content;
s101: the physical layer judges whether the current data packet is system information change data or paging data, and if the current data packet is the system information change data, the physical layer wakes up a protocol stack and submits information; if yes, executing S102;
s102: and the physical layer judges whether the paging information is specific to the terminal, and if so, awakens the protocol stack and submits the information.
3. An NB-IoT power saving method as in claim 1, wherein: when the measurement reselection processing is carried out, the following contents are executed:
s400: the physical layer receives a downlink reference signal, and the protocol stack sleeps;
s401: the physical layer judges whether cell reselection is needed according to the downlink reference signal and a reselection formula, if so, S402 is executed, and if not, the measurement reselection process is finished;
s402: awakening a core where the protocol stack is located and submitting reselection information to the protocol stack;
s403: and the protocol stack initiates reselection according to the reselection information.
4. A power saving NB-IoT chip applied to the NB-IoT power saving method as claimed in claim 1, comprising a plurality of cores, on which a protocol stack and a physical layer are running, wherein: the protocol stack and the physical layer run through different cores.
5. The power-saving NB-IoT chip of claim 4, wherein: the protocol stack and the physical layer run on a low power core.
6. The power-saving NB-IoT chip of claim 4, wherein: the power-saving NB-IoT chip uses the NB-IoT power saving method of any of claims 2-3 to run the processing tasks of the protocol stack and the physical layer.
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