WO2019218806A1

WO2019218806A1 - Method and apparatus for reducing sar value, and computer storage medium

Info

Publication number: WO2019218806A1
Application number: PCT/CN2019/082021
Authority: WO
Inventors: 史志华
Original assignee: Oppo广东移动通信有限公司
Priority date: 2018-05-14
Filing date: 2019-04-10
Publication date: 2019-11-21
Also published as: CN110493871A; CN110493871B

Abstract

Disclosed are a method and apparatus for reducing an SAR value, and a computer storage medium. The method comprises: a terminal determining an actual uplink time slot ratio of the terminal; and when the actual uplink time slot ratio of the terminal exceeds the maximum uplink time slot ratio supported by the terminal, not sending any signal on one or more uplink symbols scheduled by a network device to the terminal, so as to reduce the SAR value of the terminal.

Description

Method and device for reducing SAR value, computer storage medium

Technical field

The present invention relates to the field of wireless communication technologies, and in particular, to a method and apparatus for autonomously reducing a value of a SAR (Specific Absorption Rate), and a computer storage medium.

Background technique

SAR is a parameter to measure the intensity of electromagnetic radiation emitted by the terminal to the human body. The standard has strict requirements on the SAR value, and the terminal cannot exceed this limit. Generally, the higher the transmission power of the terminal, the higher the SAR value, and the higher the proportion of the uplink time slot used by the terminal, the higher the SAR value. Therefore, the high power terminal (power > 23dBm) has a higher SAR value than the ordinary power terminal (power = 23dBm), and the uplink time slot ratio is limited in order to avoid the SAR value exceeding the regulatory requirements.

For the fifth generation (5G, 5 ^th Generation) new air interface (NR, New Radio), the high power to circumvent the problem of excessive SAR terminal, the terminal needs to report its supported uplink timeslot proportion at high power conditions. When the actual line slot ratio exceeds its capacity, the high power terminal power level is rolled back to the normal power terminal. However, the use of power backoff by the terminal will result in a decrease in uplink coverage. In severe cases, uplink failure will occur and the user experience will be affected.

Summary of the invention

To solve the above technical problem, the embodiment of the present application provides a method and apparatus for reducing SAR value, and a computer storage medium.

The method for reducing SAR value provided by the embodiment of the present application includes:

The terminal determines an actual line slot ratio of the terminal;

When the actual line slot ratio of the terminal exceeds the maximum uplink time slot ratio supported by the terminal, no signal is sent on one or more uplink symbols scheduled by the network device to the terminal to reduce the terminal. SAR value.

In the embodiment of the present application, the method further includes:

The terminal sends a first notification message to the network device, where the first notification message is used to notify the network device that the actual line slot proportion of the terminal exceeds the maximum uplink time slot ratio supported by the terminal. Causing the network device to reduce uplink symbols scheduled to the terminal.

In the embodiment of the present application, the terminal determines the actual time slot proportion of the terminal, including:

After the terminal enters the connected state, the actual time slot proportion in the first time period is recorded; or

The actual line slot ratio in the first time period is recorded in a state where the transmission power of the terminal satisfies the specified condition.

In the embodiment of the present application, the recording the actual row time slot ratio in the first time period includes:

The terminal records an uplink transmission time length in a first time range in a first time period, and determines an uplink symbol time length in a second time range in the first time period based on uplink and downlink configuration information, where a time period including the first time range and the second time range;

The terminal determines an actual row slot ratio in the first time period based on an uplink transmission time length in the first time range and an uplink symbol time length in the second time range.

In the embodiment of the present application, when the duration of the current time from the initial time is greater than or equal to the duration of the first time period, the time domain position of the first time period changes with the change of the current time.

In the embodiment of the present application, the time domain position of the first time period changes with the current time, including:

When the current time reaches the end time of the first time period, the time domain position of the first time period is increased by at least one time unit.

In this embodiment of the present application, the time domain location of the first time period is increased by at least one time unit, including:

The first time unit of the first time period is removed from the first time period while a time unit is added at the end of the first time period.

In this embodiment of the present application, the time unit is a subframe, or a time slot, or a short transmission time interval (sTTI).

In the embodiment of the present application, the first time range in the first time period is a time range before the current time in the first time period; and the second time range in the first time period is the first time range The time range after the current time in the time period.

The apparatus for reducing SAR value provided by the embodiment of the present application includes:

a determining unit, configured to determine an actual line slot ratio of the terminal;

a transmitting unit, configured to: when the actual line slot ratio of the terminal exceeds a maximum uplink time slot ratio supported by the terminal, not transmitting a signal on one or more uplink symbols scheduled by the network device to the terminal, To reduce the SAR value of the terminal.

In the embodiment of the present application, the device further includes:

a notification unit, configured to send a first notification message to the network device, where the first notification message is used to notify the network device that the actual line slot proportion of the terminal exceeds a maximum uplink time slot supported by the terminal The ratio is such that the network device reduces the uplink symbols scheduled to the terminal.

In the embodiment of the present application, the determining unit is configured to record an actual row slot ratio in a first time period after the terminal enters a connected state, or a state in which a transmit power of the terminal meets a specified condition. Next, the actual row time slot ratio in the first time period is recorded.

In the embodiment of the present application, the determining unit is configured to record an uplink transmission time length in a first time range in a first time period, and determine a second time range in the first time period based on uplink and downlink configuration information. The length of the uplink symbol within, the first time period including the first time range and the second time range; based on an uplink transmission time length in the first time range and the second time range The length of the uplink symbol length determines the actual line slot proportion in the first time period.

In this embodiment of the present application, the time unit is a subframe, or a time slot, or an sTTI.

The computer storage medium provided by the embodiment of the present application has stored thereon computer executable instructions, and the computer executable instructions are implemented by the processor to implement the foregoing method for reducing SAR values.

In the technical solution of the embodiment of the present application, the terminal determines the actual line slot proportion of the terminal; when the actual line slot ratio of the terminal exceeds the maximum uplink time slot ratio supported by the terminal, the network device schedules No signal is sent to one or more upstream symbols of the terminal to reduce the SAR value of the terminal. With the technical solution of the embodiment of the present application, the terminal reduces the proportion of the uplink time slot by actively dropping packets, thereby avoiding the problem that the SAR value exceeds the standard. On the other hand, the terminal does not need to adjust the power level to meet the SAR value does not exceed the standard, and avoids the problem of insufficient uplink coverage caused by the power level adjustment.

DRAWINGS

The drawings described herein are intended to provide a further understanding of the present application, and are intended to be a part of this application. In the drawing:

1 is a schematic flowchart of a method for reducing a SAR value according to an embodiment of the present application;

2 is a schematic diagram of a time domain position change of a first time period according to an embodiment of the present application;

FIG. 3 is a schematic diagram of interaction between a UE and a BS according to an embodiment of the present application;

4 is a schematic structural diagram of a device for reducing SAR values according to an embodiment of the present application;

FIG. 5 is a schematic structural diagram of a computer device according to an embodiment of the present application.

Detailed ways

To facilitate the understanding of the technical solutions of the embodiments of the present application, the related concepts of uplink and downlink resource configuration are explained below.

In the era of Long Term Evolution (LTE), the 26dBm high-power terminal is introduced on the Time Division Duplexing (TDD), which limits the uplink and downlink time slot ratio used by the network to solve the SAR over-standard, that is, over 50. The slot ratio of the % uplink transmission cannot be used. This is feasible in the LTE network, because the uplink and downlink time slot ratio of LTE is a fixed 7 modes, as shown in Table 1 below, and the time slot ratio actually used by the network is also statically unchanged.

Table 1

However, for NR, the simple solution of LTE is no longer applicable. The reason is that the uplink and downlink ratio of NR is no longer a fixed mode, but is dynamically adjustable. As shown in Table 2 below, it includes the uplink symbol. (UL symbol, indicated by U in the table), downlink symbol (DL symbol, denoted by D in the table), flexible symbol (represented by X in the table), where flexible symbol can be used for each terminal (UE, User Equipment) Dynamically set to UL symbol or DL symbol or null symbol. Therefore, in the standard, it is no longer possible to simply limit certain types of uplink and downlink ratios to use high power. In addition, the uplink and downlink of LTE are all in units of 1 ms subframes, and NR uses symbols as the basic unit of uplink and downlink. The length of the symbol also varies with the subcarrier spacing used by the network. As can be seen from the above, in order to avoid the problem of high power terminal SAR exceeding the standard, it is necessary to find a new solution.

Table 2

FIG. 1 is a schematic flowchart of a method for reducing a SAR value according to an embodiment of the present application. As shown in FIG. 1 , the method for reducing a SAR value includes the following steps:

Step 101: The terminal determines the actual line slot proportion of the terminal.

The terminal in the embodiment of the present application may be any device capable of communicating with a network such as a mobile phone, a tablet computer, a notebook computer, or a desktop computer. The network device in this embodiment of the present application may be a base station, such as a gNB of a 5G system.

In the embodiment of the present application, the terminal determines the actual line slot proportion of the terminal, which can be implemented in the following manner:

After the terminal enters the connected state, the actual time slot proportion in the first time period is recorded; or, in the state that the transmission power of the terminal meets the specified condition, the actual time slot in the first time period is recorded. ratio.

It is assumed that the first time period corresponds to the time window T, and the actual line slot ratio in the first time period is also the proportion of the uplink time slot in the time window T. Specifically, when the terminal enters the connected state, the terminal starts the cyclic recording. The ratio of the uplink time slot in the time window T; or, after the terminal satisfies certain conditions, such as in a higher transmission power interval, the time slot of the uplink time slot recorded in the time window T is started, and the time window T can be It is 5ms, 10ms or longer.

Further, the actual row slot ratio in the first time period of the recording may be implemented in the following manner:

Here, when the duration of the current time from the initial time is greater than or equal to the duration of the first time period, the time domain position of the first time period changes with the change of the current time. Further, when the current time reaches the end time of the first time period, the time domain position of the first time period is increased by at least one time unit. Specifically, the first time unit of the first time period is removed from the first time period, and a time unit is added at the end of the first time period. In an embodiment, the time unit is a subframe, or a time slot, or an sTTI. In the above solution, the first time range in the first time period is a time range before the current time in the first time period; the second time range in the first time period is the first time period The time range after the current time in the middle.

In the above solution, the terminal updates the actual line slot proportion in the first time period in a time unit step according to the uplink and downlink configuration information.

For example, initially, the time domain position of the first time period is [t0, t1], t1-t0=T, the current time changes from t0 to t1, and when the current time reaches the end time of the first time period, The time domain location of the first time period needs to be updated, that is, the time domain location of the first time period is increased by at least one time unit, for example, by adding a time unit, the first time unit of the first time period. Moving out of the first time period while adding a time unit at the end of the first time period. Referring to FIG. 2, the time domain position of the first time period is increased by one time unit, and the time unit takes a subframe as an example, and moves the first subframe 1 in the first T0 period, and is at the first T0. Subframe n+1 is added after the last subframe n of the period, so that a second T0 period is formed, and when the current moment reaches the end of the second T0 period, the first one in the second T0 period is The sub-frame 2 is shifted out, and the sub-frame n+2 is added after the last sub-frame n+1 of the second T0 period, and so on. The duration of the current time from the initial time t0 is greater than or equal to the duration T0 of the first time period. The time domain position of the first time period changes with the change of the current time.

Step 102: When the actual line slot ratio of the terminal exceeds the maximum uplink time slot ratio supported by the terminal, the network device does not send a signal to one or more uplink symbols of the terminal to reduce the location. The SAR value of the terminal.

In order to meet the SAR value requirement, the actual line slot ratio of the high power terminal should not exceed a certain ratio, and the maximum uplink time slot ratio supported by the terminal is maxUplinkDutyCycle. When the actual line slot ratio in the first time period (that is, the time window T) reaches the maxUplinkDutyCycle, the terminal actively discards the uplink data transmission scheduled by the network to the terminal, and does not transmit data.

In an embodiment, the terminal sends a first notification message to the network device, where the first notification message is used to notify the network device that the actual line slot proportion of the terminal exceeds that supported by the terminal. The maximum uplink time slot ratio causes the network device to reduce the uplink symbols scheduled to the terminal.

In the embodiment of the present application, the terminal discards the uplink data transmission scheduled by the network, and the network will not receive the ACK or NACK feedback information corresponding to the uplink symbol, and the network has two possible interpretations, that is, the symbol is lost or the actual line slot of the terminal The proportion exceeds the maximum uplink time slot ratio supported by the terminal. The first notification message reported by the terminal will determine the cause of the missing uplink transmission signal of the terminal, and further adjust the uplink scheduling policy for the terminal, as shown in FIG. 3.

In the technical solution of the embodiment of the present application, when the terminal detects that the actual time slot ratio exceeds the SAR value, the terminal uses the method of actively abandoning the uplink time slot to reduce the total uplink power in a period of time, thereby reducing the SAR statistics.

4 is a schematic structural diagram of an apparatus for reducing SAR values according to an embodiment of the present application. As shown in FIG. 4, the apparatus for reducing SAR values includes:

a determining unit 401, configured to determine an actual line slot ratio of the terminal;

The transmitting unit 402 is configured to: when the proportion of the actual line slot of the terminal exceeds the maximum uplink time slot ratio supported by the terminal, not sending a signal on the one or more uplink symbols scheduled by the network device to the terminal To reduce the SAR value of the terminal.

In an embodiment, the device further includes:

The notification unit 403 is configured to send, to the network device, a first notification message, where the first notification message is used to notify the network device that the actual line slot ratio of the terminal exceeds a maximum uplink supported by the terminal. The slot ratio causes the network device to reduce the uplink symbols scheduled to the terminal.

In an embodiment, the determining unit 401 is configured to record an actual row slot ratio in a first time period after the terminal enters a connected state; or, if the transmit power of the terminal meets a specified condition In the state, the actual line slot proportion in the first time period is recorded.

In an embodiment, the determining unit 401 is configured to record an uplink transmission time length in a first time range in a first time period, and determine a second time in the first time period based on uplink and downlink configuration information. a length of the uplink symbol in the range, the first time period including the first time range and the second time range; based on an uplink transmission time length in the first time range and the second time range The length of the uplink symbol time determines the actual line slot proportion in the first time period.

In an embodiment, when the duration of the current time from the initial time is greater than or equal to the duration of the first time period, the time domain position of the first time period changes with the change of the current time.

In an embodiment, the time domain position of the first time period changes with the change of the current time, including:

In an embodiment, the time domain location of the first time period is increased by at least one time unit, including:

In an embodiment, the time unit is a subframe, or a time slot, or an sTTI.

In an embodiment, the first time range in the first time period is a time range before the current time in the first time period; and the second time range in the first time period is the first time range The time range after the current time in the time period.

It will be understood by those skilled in the art that the implementation functions of the units in the SAR-reducing apparatus shown in FIG. 4 can be understood by referring to the aforementioned description of the method of reducing the SAR value. The functions of the units in the SAR-reducing device shown in FIG. 4 can be implemented by a program running on the processor, or can be realized by a specific logic circuit.

The apparatus for reducing the SAR value described above in the embodiment of the present application may also be stored in a computer readable storage medium if it is implemented in the form of a software function module and sold or used as a stand-alone product. Based on such understanding, the technical solution of the embodiments of the present application may be embodied in the form of a software product in essence or in the form of a software product stored in a storage medium, including a plurality of instructions. A computer device (which may be a personal computer, server, or network device, etc.) is caused to perform all or part of the methods described in various embodiments of the present application. The foregoing storage medium includes various media that can store program codes, such as a USB flash drive, a mobile hard disk, a read only memory (ROM), a magnetic disk, or an optical disk. Thus, embodiments of the present application are not limited to any particular combination of hardware and software.

Correspondingly, the embodiment of the present application further provides a computer storage medium, wherein the computer executable instructions are stored, and the computer executable instructions are executed by the processor to implement the foregoing method for reducing SAR values in the embodiments of the present application.

FIG. 5 is a schematic structural diagram of a computer device according to an embodiment of the present disclosure. The computer device may be a terminal or a network device. As shown in FIG. 5, computer device 100 may include one or more (only one shown) processor 1002 (processor 1002 may include, but is not limited to, a Micro Controller Unit (MCU) or a programmable logic device. A processing device such as an FPGA (Field Programmable Gate Array), a memory 1004 for storing data, and a transmission device 1006 for a communication function. It will be understood by those skilled in the art that the structure shown in FIG. 5 is merely illustrative, and does not limit the structure of the above electronic device. For example, computer device 100 may also include more or fewer components than shown in FIG. 5, or have a different configuration than that shown in FIG.

The memory 1004 can be used to store software programs and modules of application software, such as program instructions/modules corresponding to the methods in the embodiments of the present application, and the processor 1002 executes various functional applications by running software programs and modules stored in the memory 1004. And data processing, that is, to achieve the above method. Memory 1004 can include high speed random access memory, and can also include non-volatile memory, such as one or more magnetic storage devices, flash memory, or other non-volatile solid state memory. In some examples, memory 1004 can further include memory remotely located relative to processor 1002, which can be connected to computer device 100 over a network. Examples of such networks include, but are not limited to, the Internet, intranets, local area networks, mobile communication networks, and combinations thereof.

Transmission device 1006 is for receiving or transmitting data via a network. The network specific examples described above may include a wireless network provided by a communication provider of computer device 100. In one example, the transmission device 1006 includes a Network Interface Controller (NIC) that can be connected to other network devices through a base station to communicate with the Internet. In one example, the transmission device 1006 can be a radio frequency (RF) module for communicating with the Internet wirelessly.

The technical solutions described in the embodiments of the present application can be arbitrarily combined without conflict.

In the several embodiments provided by the present application, it should be understood that the disclosed method and smart device may be implemented in other manners. The device embodiments described above are merely illustrative. For example, the division of the unit is only a logical function division. In actual implementation, there may be another division manner, such as: multiple units or components may be combined, or Can be integrated into another system, or some features can be ignored or not executed. In addition, the coupling, or direct coupling, or communication connection of the components shown or discussed may be indirect coupling or communication connection through some interfaces, devices or units, and may be electrical, mechanical or other forms. of.

The units described above as separate components may or may not be physically separated, and the components displayed as the unit may or may not be physical units, that is, may be located in one place or distributed to multiple network units; Some or all of the units may be selected according to actual needs to achieve the purpose of the solution of the embodiment.

In addition, each functional unit in each embodiment of the present application may be integrated into one second processing unit, or each unit may be separately used as one unit, or two or more units may be integrated into one unit; The above integrated unit can be implemented in the form of hardware or in the form of hardware plus software functional units.

The foregoing is only a specific embodiment of the present application, but the scope of protection of the present application is not limited thereto, and any person skilled in the art can easily think of changes or substitutions within the technical scope disclosed in the present application. It should be covered by the scope of protection of this application.

Claims

A method of reducing an electromagnetic wave absorption ratio SAR value, the method comprising:

The terminal determines an actual line slot ratio of the terminal;

When the actual line slot ratio of the terminal exceeds the maximum uplink time slot ratio supported by the terminal, no signal is sent on one or more uplink symbols scheduled by the network device to the terminal to reduce the terminal. SAR value.
The method of claim 1 wherein the method further comprises:

The terminal sends a first notification message to the network device, where the first notification message is used to notify the network device that the actual line slot proportion of the terminal exceeds the maximum uplink time slot ratio supported by the terminal. Causing the network device to reduce uplink symbols scheduled to the terminal.
The method according to claim 1 or 2, wherein the terminal determines the actual line slot proportion of the terminal, including:

After the terminal enters the connected state, the actual time slot proportion in the first time period is recorded; or

The actual line slot ratio in the first time period is recorded in a state where the transmission power of the terminal satisfies the specified condition.
The method according to claim 3, wherein said recording the actual row time slot ratio in the first time period comprises:

The terminal records an uplink transmission time length in a first time range in a first time period, and determines an uplink symbol time length in a second time range in the first time period based on uplink and downlink configuration information, where a time period including the first time range and the second time range;

The terminal determines an actual row slot ratio in the first time period based on an uplink transmission time length in the first time range and an uplink symbol time length in the second time range.
The method according to claim 4, wherein when the duration of the current time from the initial time is greater than or equal to the duration of the first time period, the time domain position of the first time period changes with the change of the current time.
The method according to claim 5, wherein the time domain position of the first time period changes with a change of the current time, including:

When the current time reaches the end time of the first time period, the time domain position of the first time period is increased by at least one time unit.
The method of claim 6, wherein the time domain location of the first time period is increased by at least one time unit, comprising:

The first time unit of the first time period is removed from the first time period while a time unit is added at the end of the first time period.
The method according to claim 6 or 7, wherein the time unit is a subframe, or a time slot, or a short time interval sTTI.
The method according to any one of claims 4 to 8, wherein the first time range in the first time period is a time range before the current time in the first time period; in the first time period The second time range is the time range after the current time in the first time period.
A device for reducing SAR values, the device comprising:

a determining unit, configured to determine an actual line slot ratio of the terminal;

a transmitting unit, configured to: when the actual line slot ratio of the terminal exceeds a maximum uplink time slot ratio supported by the terminal, not transmitting a signal on one or more uplink symbols scheduled by the network device to the terminal, To reduce the SAR value of the terminal.
The device of claim 10, wherein the device further comprises:

a notification unit, configured to send a first notification message to the network device, where the first notification message is used to notify the network device that the actual line slot proportion of the terminal exceeds a maximum uplink time slot supported by the terminal The ratio is such that the network device reduces the uplink symbols scheduled to the terminal.
The apparatus according to claim 10 or 11, wherein the determining unit is configured to record an actual row slot ratio in a first time period after the terminal enters a connected state; or at the terminal In the state where the transmission power satisfies the specified condition, the actual line slot proportion in the first time period is recorded.
The apparatus according to claim 12, wherein the determining unit is configured to record an uplink transmission time length in a first time range in a first time period, and determine the first time period based on uplink and downlink configuration information. An uplink symbol time length in a second time range, the first time period including the first time range and the second time range; based on an uplink transmission time length and the first in the first time range The length of the uplink symbol in the second time range determines the actual line slot ratio in the first time period.
The apparatus according to claim 13, wherein when the duration of the current time from the initial time is greater than or equal to the duration of the first time period, the time domain position of the first time period changes with the change of the current time.
The apparatus according to claim 14, wherein the time domain position of the first time period changes with a change of the current time, including:

When the current time reaches the end time of the first time period, the time domain position of the first time period is increased by at least one time unit.
The apparatus of claim 15, wherein the time domain location of the first time period is increased by at least one time unit, comprising:

The first time unit of the first time period is removed from the first time period while a time unit is added at the end of the first time period.
The apparatus of claim 15 or 16, wherein the time unit is a subframe, or a time slot, or an sTTI.
The apparatus according to any one of claims 13 to 17, wherein the first time range in the first time period is a time range before the current time in the first time period; in the first time period The second time range is the time range after the current time in the first time period.
A computer storage medium having stored thereon computer executable instructions for performing the method steps of any one of claims 1 to 9 when executed by a processor.