CN109788537B - Method, base station and terminal for controlling uplink power - Google Patents
Method, base station and terminal for controlling uplink power Download PDFInfo
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- CN109788537B CN109788537B CN201711128535.7A CN201711128535A CN109788537B CN 109788537 B CN109788537 B CN 109788537B CN 201711128535 A CN201711128535 A CN 201711128535A CN 109788537 B CN109788537 B CN 109788537B
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Abstract
The invention provides a method, a base station and a terminal for controlling uplink power, wherein the method for controlling the uplink power comprises the following steps: and the base station sends uplink background noise information, the expected receiving power determined by the uplink background noise information or the transmission power control signaling determined by the uplink background noise information to the terminal so that the terminal determines the uplink transmitting power. The invention considers the influence of uplink interference factors in uplink power control, thereby avoiding the problems of increase of data BLER transmitted by the terminal or reduction of the transmission rate of the terminal caused by insufficient uplink transmitting power of the terminal.
Description
Technical Field
The present invention relates to the field of wireless communication technologies, and in particular, to a method, a base station, and a terminal for controlling uplink power.
Background
Uplink power control in a wireless system is very important, and by the uplink power control, a terminal (UE) in a cell can reduce interference to other users as much as possible on the basis of ensuring the quality of uplink transmission data, and prolong the service time of a terminal battery.
Uplink power is divided into two categories, open-loop power control and closed-loop power control. In open loop power control, the base station sends down the expected received power, and the terminal calculates the uplink transmitting power according to the expected received power sent by the base station and the currently measured signal strength. In closed-loop Power Control, a base station transmits a Transmission Power Control (TPC) signaling to a terminal to notify the terminal of uplink Power adjustment, based on measured channel quality (Signal to Noise Ratio, SNR)/Signal to Interference plus Noise Ratio (SINR)), Power Headroom Report (PHR), target SNR/SINR, or the like.
In the existing uplink power control method, in open-loop power control, the expected received power sent by the base station does not consider the influence of uplink interference factors, and in closed-loop power control, when the base station issues a transmission power control signaling to the terminal, the influence of the uplink interference factors is not considered, which will cause that the uplink transmission power of the terminal is insufficient, the SINR/SNR received by the base station does not reach a target value, and further causes that the block error rate (BLER) of data transmitted by the terminal is increased or the transmission rate of the terminal is decreased.
Disclosure of Invention
In view of this, the present invention provides a method, a base station and a terminal for controlling uplink power, wherein in uplink power control, the influence of uplink interference factors is considered, so as to avoid the problem that the BLER of data transmitted by a terminal is increased or the transmission rate of the terminal is decreased due to insufficient uplink transmission power of the terminal.
In order to solve the above technical problem, in a first aspect, the present invention provides a method for controlling uplink power, which is applied to a base station, and includes:
determining uplink background noise information according to the current uplink background noise;
and broadcasting the uplink background noise information to a terminal so that the terminal can determine uplink transmitting power according to the received uplink background noise information.
In a second aspect, the present invention provides a method for controlling uplink power, where an application terminal includes:
receiving uplink background noise information and expected receiving power broadcast by a base station;
and determining uplink transmitting power according to the uplink background noise information broadcast by the base station and the expected receiving power.
In a third aspect, the present invention provides a method for uplink power control, which applies a base station, and includes:
determining uplink background noise information according to the current uplink background noise;
determining expected receiving power issued to a terminal according to the uplink background noise information;
broadcasting the desired received power to the terminal.
In a fourth aspect, the present invention provides a method for controlling uplink power, where an application terminal includes:
receiving expected receiving power sent by a base station, wherein the expected receiving power is determined by the base station according to uplink background noise information;
and determining uplink transmitting power according to the expected receiving power sent by the base station.
In a fifth aspect, the present invention provides a method for uplink power control, where a base station is applied, and the method includes:
determining uplink background noise information according to the current uplink background noise;
determining a transmitted power control signaling according to the uplink background noise information;
and transmitting the transmission power control signaling to the terminal.
In a sixth aspect, the present invention provides a method for controlling uplink power, where an application terminal includes:
receiving a transmission power control signaling sent by a base station;
and adjusting the uplink transmitting power according to the transmission power control signaling.
In a seventh aspect, the present invention provides a base station, including:
the processor is used for determining uplink background noise information according to the current uplink background noise;
and the transmitter is used for broadcasting the uplink background noise information to the terminal so that the terminal can determine the uplink transmitting power according to the received uplink background noise information.
In an eighth aspect, the present invention provides a terminal, including:
the receiver is used for receiving the uplink background noise information broadcasted by the base station;
and the processor is used for determining the uplink transmitting power according to the uplink background noise information.
In a ninth aspect, the present invention provides a base station, comprising:
the processor is used for determining uplink background noise information according to the current uplink background noise; determining expected receiving power issued to a terminal according to the uplink background noise information;
a transmitter for broadcasting the desired received power to a terminal.
In a tenth aspect, the present invention provides a terminal, comprising:
the receiver is used for receiving expected receiving power sent by a base station, and the expected receiving power is determined by the base station according to uplink background noise information;
and the processor is used for determining the uplink transmitting power according to the expected receiving power sent by the base station.
In an eleventh aspect, the present invention provides a base station, comprising:
the processor is used for determining uplink background noise information according to the current uplink background noise; determining a transmitted power control signaling according to the uplink background noise information;
and transmitting the transmission power control signaling to the terminal.
In a twelfth aspect, the present invention provides a terminal, including:
the receiver is used for receiving a transmission power control signaling sent by a base station;
and the processor is used for adjusting the uplink transmitting power according to the transmission power control signaling.
In a thirteenth aspect, the present invention provides a base station comprising a memory, a processor and a computer program stored on the memory and executable on the processor; the processor implements the above uplink power control method applied to the base station when executing the program.
In a fourteenth aspect, the present invention provides a terminal comprising a memory, a processor, and a computer program stored on the memory and executable on the processor; the processor implements the above uplink power control method applied to the terminal when executing the program.
In a fifteenth aspect, the present invention provides a computer-readable storage medium, on which a computer program is stored, which when executed by a processor, implements the steps in the above-mentioned uplink power control method for a base station.
In a sixteenth aspect, the present invention provides a computer-readable storage medium, having stored thereon a computer program, which when executed by a processor, implements the steps in the above-mentioned uplink power control method for an application terminal.
The technical scheme of the invention has the following beneficial effects:
in the uplink power control, the influence of uplink interference factors is considered, so that the problems of increase of data BLER transmitted by the terminal or reduction of the transmission rate of the terminal caused by insufficient uplink transmission power of the terminal are solved.
Drawings
In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings needed to be used in the description of the embodiments of the present invention will be briefly introduced below, and it is obvious that the drawings in the following description are only some embodiments of the present invention, and it is obvious for those skilled in the art that other drawings can be obtained according to these drawings without inventive labor.
Fig. 1 is a flowchart illustrating an uplink power control method according to a first embodiment of the present invention;
fig. 2 is a flowchart illustrating an uplink power control method according to a second embodiment of the present invention;
fig. 3 is a flowchart illustrating an uplink power control method according to a third embodiment of the present invention;
fig. 4 is a flowchart illustrating an uplink power control method according to a fourth embodiment of the present invention;
fig. 5 is a flowchart illustrating an uplink power control method according to a fifth embodiment of the present invention;
fig. 6 is a flowchart illustrating an uplink power control method according to a sixth embodiment of the present invention;
fig. 7 is a schematic structural diagram of a base station according to a seventh embodiment of the present invention;
fig. 8 is a schematic structural diagram of a terminal according to an eighth embodiment of the present invention;
fig. 9 is a schematic structural diagram of a base station according to a ninth embodiment of the present invention;
fig. 10 is a schematic structural diagram of a terminal according to a tenth embodiment of the present invention;
fig. 11 is a schematic structural diagram of a base station according to an eleventh embodiment of the present invention;
fig. 12 is a schematic structural diagram of a terminal according to a twelfth embodiment of the present invention.
Detailed Description
In order to make the objects, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the drawings of the embodiments of the present invention. It is to be understood that the embodiments described are only a few embodiments of the present invention, and not all embodiments. All other embodiments, which can be derived by a person skilled in the art from the described embodiments of the invention, are within the scope of the invention.
Referring to fig. 1, fig. 1 is a flowchart illustrating an uplink power control method according to a first embodiment of the present invention, where the uplink power control method is applied to a base station, and includes:
step 11: determining uplink background noise information according to the current uplink background noise;
step 12: and broadcasting the uplink background noise information to a terminal so that the terminal can determine uplink transmitting power according to the received uplink background noise information.
The uplink power control method of the embodiment of the invention is an open loop power control method.
In the embodiment of the invention, the base station broadcasts the uplink background noise information to the terminal so that the terminal can determine the initial uplink transmitting power according to the received uplink background noise information, and the terminal takes the influence of an uplink interference factor (uplink background noise) into consideration when determining the uplink transmitting power and compensates the uplink interference, so that the determined uplink transmitting power is more accurate, and the problems of increase of BLER (block error rate) of data transmitted by the terminal or reduction of the transmission rate of the terminal caused by insufficient uplink transmitting power can be avoided.
The term "noise floor" refers to noise floor, which may also be referred to as background noise, and refers to the total noise excluding the useful signal.
The uplink background noise information in the embodiment of the present invention may be information of the uplink background noise itself, or may be information of the uplink background noise rise level.
The uplink background noise information may be a statistical value obtained by the base station performing statistics on the uplink background noise (or the uplink background noise rise level) within a certain time period, and the statistical value may be an average value of the uplink background noise (or the uplink background noise rise level) within a certain time period. When the base station broadcasts the uplink background noise information for the first time, the uplink background noise information may also be a default value.
In this embodiment of the present invention, the base station may broadcast the uplink noise floor information through a system message, where the system message may be, for example, SIB 2. Specifically, the base station may add M (M is greater than or equal to 2) bits to the system message to identify the current uplink background noise information of the base station. For example, when the system message is SIB2, an "uplinkInereferencelevel" field of a new Mbit may be added in SIB2 to identify the current uplink background noise information of the base station.
The following describes a manner of representing uplink background noise information by way of example.
In an embodiment of the present invention, the uplink background noise information is information of an uplink background noise rise level, and the uplink background noise information may be: an M bit "uplinkInereferenceencelevel" field is newly added in the system broadcast message SIB2, and is used for identifying the ascending base noise rise degree of the current base station, the specific division mode can be flexibly adjusted, and if the M bit is 3 bits, the following mode can be adopted:
in the above table, the first column is different values of a "uplinkInereferencelevel" field newly added in the system message SIB2, the second column is an uplink bottom noise rise level corresponding to the different values of the "uplinkInereferencelevel" field, and the third column is a current uplink bottom noise rise value of the base station.
Certainly, in some other embodiments of the present invention, it is also not limited to use 3-bit information to identify the current uplink background noise information of the base station, and 2 bits may also be used, or more bits than 3 bits may also be used, and it can be understood that the larger the bit value used is, the more detailed the information that can be described is.
Since the uplink background noise of the base station may change continuously, preferably, in the uplink power control method according to the embodiment of the present invention, after the step of broadcasting the uplink background noise information, the method may further include: updating the uplink background noise information when the difference value between the currently detected uplink background noise and the uplink background noise corresponding to the broadcasted uplink background noise information is greater than or equal to a preset threshold value and lasts for a certain time; and broadcasting the updated uplink background noise information.
The following examples are given.
The base station broadcasts uplink background noise information, wherein the uplink background noise information is information of an uplink background noise lifting level, the uplink background noise lifting level broadcasted currently is A, and the A is the current uplink background noise lifting level or a certain default value of the base station.
And the base station detects the uplink background noise at a certain period to obtain an average value B of the current uplink background noise rise level, and if the detection result B in the continuous T1 time is higher than the broadcast uplink background noise rise level A by C, namely B is greater than A + C, the uplink background noise information is updated, and the broadcast uplink background noise rise level is changed into B.
When determining the uplink transmission power, the terminal generally needs an expected received power sent by the base station, and therefore, the uplink power control method in the embodiment of the present invention may further include: the desired received power is transmitted to the terminal.
Referring to fig. 2, fig. 2 is a flowchart illustrating an uplink power control method according to a second embodiment of the present invention, where the uplink power control method is applied to a terminal, and includes:
step 21: receiving uplink background noise information and expected receiving power broadcast by a base station;
step 22: and determining uplink transmitting power according to the uplink background noise information broadcast by the base station and the expected receiving power.
The uplink power control method of the embodiment of the invention is an open loop power control method.
In the embodiment of the invention, the terminal receives the uplink background noise information and the expected receiving power broadcasted by the base station, and determines the initial uplink transmitting power according to the received uplink background noise information and the expected receiving power, and the terminal takes the influence of an uplink interference factor (uplink background noise) into consideration when determining the uplink transmitting power and compensates the uplink interference, so that the determined uplink transmitting power is more accurate, and the problems of increase of BLER (block error rate) of data transmitted by the terminal or reduction of the transmission rate of the terminal caused by insufficient uplink transmitting power can be avoided.
The uplink background noise information in the embodiment of the present invention may be information of the uplink background noise itself, or may be information of the uplink background noise rise level.
The uplink background noise information may be a statistical value obtained by the base station performing statistics on the uplink background noise (or the uplink background noise rise level) within a certain time period, and the statistical value may be an average value of the uplink background noise (or the uplink background noise rise level) within a certain time period. When the base station broadcasts the uplink background noise information for the first time, the uplink background noise information may also be a default value.
In this embodiment of the present invention, the base station may broadcast the uplink noise floor information through a system message, where the system message may be, for example, SIB 2. Specifically, the base station may add M (M is greater than or equal to 2) bits to the system message to identify the current uplink background noise information of the base station. For example, when the system message is SIB2, an "uplinkInereferencelevel" field of a new Mbit may be added in SIB2 to identify the current uplink background noise information of the base station.
In the embodiment of the invention, the terminal can add the relevant parameters of the uplink background noise information in a calculation formula for calculating the uplink transmitting power. For example, β may be added to the calculation formula for calculating the uplink transmission powerc(j)·IoTcWherein IoTcFor the ascending bottom noise or ascending bottom noise rising level, betac(j) The compensation coefficient for the uplink interference is a value greater than 0 and less than 1. In particular, betac(j) May be determined based on empirical values.
Taking a Physical Uplink Shared Channel (PUSCH) as an example, the calculation formula of the Uplink transmission power may be as follows:
wherein, PPUSCH,c(i) Is the uplink transmission power of the PUSCH; 10log10(MPUSCH,c(i) Power spectral density compensation, associated with uplink scheduling resources; pO_PUSCH,c(j) The values of j are different for the receiving power expected by the base station, which represents different scenes, and the receiving power expected by the base station can be configured to the terminal by the base station through broadcast messages and RRC messages; alpha is alphac(j)·PLcFor the compensation value of the path loss, αc(j) For full or partial power compensation, PLcFor path loss, equal to the reference signal power minus the currently measured signal strength; deltaTF,c(i) Compensating for the encoding; f. ofc(i) Adjusting a value for closed-loop power control; IoT (IoT)cFor the ascending bottom noise or ascending bottom noise rising level, betac(j) The compensation coefficient for the uplink interference is a value greater than 0 and less than 1.
Of course, the method for calculating the Uplink transmit power of other channels (for example, Physical Random Access Channel (PRACH), Physical Uplink Control Channel (PUCCH), etc.) may also add β to the existing calculation formulac(j)·IoTcIn the embodiments of the present invention, there is no moreAnd (4) explanation.
Referring to fig. 3, fig. 3 is a flowchart illustrating an uplink power control method according to a third embodiment of the present invention, where the uplink power control method is applied to a base station, and includes:
step 31: determining uplink background noise information according to the current uplink background noise;
step 32: determining expected receiving power issued to a terminal according to the uplink background noise information;
step 33: broadcasting the desired received power to the terminal.
The uplink power control method of the embodiment of the invention is an open loop power control method.
In the embodiment of the invention, the base station determines the expected receiving power issued to the terminal according to the uplink background noise information and directly issues the expected receiving power to the terminal so that the terminal can determine the initial uplink transmitting power according to the received expected receiving power, and the uplink interference is compensated because the influence of an uplink interference factor (uplink background noise) is considered by the expected receiving power received by the terminal, so that the determined uplink transmitting power is more accurate, and the problems of increase of BLER (block error rate) of data transmitted by the terminal or reduction of the transmission rate of the terminal caused by insufficient uplink transmitting power can be avoided.
Since the uplink background noise of the base station may change continuously, in some embodiments of the present invention, preferably, the step of broadcasting the desired received power to the terminal further includes:
step 34: updating the uplink background noise information when the difference value between the currently detected uplink background noise and the uplink background noise corresponding to the expected receiving power is greater than or equal to a preset threshold value and lasts for a certain time;
step 35: determining an updated expected received power according to the updated uplink background noise;
step 36: broadcasting the updated desired received power to the terminal.
In some further embodiments of the present invention, after the step of broadcasting the desired received power to the terminal, the method further includes:
step 34': updating the uplink background noise information when the difference value between the currently detected uplink background noise and the uplink background noise corresponding to the expected receiving power is greater than or equal to a preset threshold value and lasts for a certain time;
step 35': determining an updated expected received power according to the updated uplink background noise;
step 36': determining an adjustment value for the desired received power based on a difference between the updated desired received power and the broadcasted desired received power;
step 37': the adjustment value of the desired reception power is transmitted to the terminal.
That is, after the uplink background noise is updated, the base station further needs to update the desired received power and directly broadcast the desired received power to the terminal, or obtain a difference between the updated desired received power and the broadcast desired received power, determine an adjustment value of the desired received power, and then transmit the adjustment value to the terminal through an RRC message.
The uplink background noise information in the embodiment of the present invention may be information of the uplink background noise itself, or may be information of the uplink background noise rise level.
The uplink background noise information may be a statistical value obtained by the base station performing statistics on the uplink background noise (or the uplink background noise rise level) within a certain time period, and the statistical value may be an average value of the uplink background noise (or the uplink background noise rise level) within a certain time period.
Referring to fig. 4, fig. 4 is a flowchart illustrating an uplink power control method according to a fourth embodiment of the present invention, where the uplink power control method is applied to a terminal, and includes:
step 41: receiving expected receiving power sent by a base station, wherein the expected receiving power is determined by the base station according to uplink background noise information;
step 42: and determining uplink transmitting power according to the expected receiving power sent by the base station.
The uplink power control method of the embodiment of the invention is an open loop power control method.
In the embodiment of the invention, the terminal receives the expected receiving power sent by the base station and determines the uplink transmitting power according to the expected receiving power sent by the base station, and the expected receiving power is determined by the base station according to the uplink background noise information, namely the influence of an uplink interference factor (uplink background noise) is considered when the uplink transmitting power is determined to compensate the uplink interference, so that the determined uplink transmitting power is more accurate, and the problems of increase of BLER (block error rate) of data transmitted by the terminal or reduction of the transmission rate of the terminal caused by insufficient uplink transmitting power can be avoided.
In the embodiment of the present invention, the base station may send the desired received power to the terminal through a system message or an RRC message.
The uplink background noise information in the embodiment of the present invention may be information of the uplink background noise itself, or may be information of the uplink background noise rise level.
The uplink background noise information may be a statistical value obtained by the base station performing statistics on the uplink background noise (or the uplink background noise rise level) within a certain time period, and the statistical value may be an average value of the uplink background noise (or the uplink background noise rise level) within a certain time period.
The uplink power control methods in the above embodiments are all open-loop power control methods, and the following describes that the uplink power control method is a closed-loop power control method.
Referring to fig. 5, fig. 5 is a flowchart illustrating an uplink power control method according to a fifth embodiment of the present invention, where the uplink power control method is applied to a base station, and includes:
step 51: determining uplink background noise information according to the current uplink background noise;
step 52: determining a Transmitted Power Control (TPC) signaling to be issued according to the uplink background noise information;
step 53: and transmitting the transmission power control signaling to the terminal.
The uplink power control method of the embodiment of the invention is a closed-loop power control method.
In the embodiment of the invention, the base station sends the transmission power control signaling to the terminal so that the terminal can adjust the uplink transmitting power according to the received transmission power control signaling, and the uplink interference is compensated by considering the influence of an uplink interference factor (uplink background noise) when the transmission power control signaling is determined, so that the uplink transmitting power determined by the terminal is more accurate, and the problems of increase of data BLER transmitted by the terminal or reduction of the transmission rate of the terminal caused by insufficient uplink transmitting power can be avoided.
In the embodiment of the present invention, when determining the transmitted power control signaling, the base station may consider the influence of factors such as measured channel quality (signal-to-noise ratio (SNR)/signal-to-interference plus noise ratio (SINR)), Power Headroom Report (PHR), or target SNR/SINR, in addition to the uplink background noise information.
Referring to fig. 6, fig. 6 is a flowchart illustrating an uplink power control method according to a sixth embodiment of the present invention, where the uplink power control method is applied to a terminal, and includes:
step 61: receiving a transmission power control signaling sent by a base station;
step 62: and adjusting the uplink transmitting power according to the transmission power control signaling.
The uplink power control method of the embodiment of the invention is a closed-loop power control method.
In the embodiment of the invention, the terminal receives the transmission power control signaling sent by the base station and adjusts the uplink transmission power according to the transmission power control signaling, and the base station takes the influence of an uplink interference factor (uplink background noise) into consideration when determining the transmission power control signaling to compensate the uplink interference, so that the uplink transmission power determined by the terminal is more accurate, and the problems of increase of BLER (block error rate) of data transmitted by the terminal or reduction of the transmission rate of the terminal caused by insufficient uplink transmission power can be avoided.
In the embodiment of the present invention, when determining the transmitted power control signaling, the base station may consider the influence of factors such as measured channel quality (signal-to-noise ratio (SNR)/signal-to-interference plus noise ratio (SINR)), Power Headroom Report (PHR), or target SNR/SINR, in addition to the uplink background noise information.
The above-mentioned open-loop power control procedure in the embodiment of the present invention is generally used in the random access procedure, and the closed-loop power control procedure is generally used after the terminal accesses.
Referring to fig. 7, a seventh embodiment of the present invention provides a base station, including:
the processor 71 is configured to determine uplink background noise information according to the current uplink background noise;
a transmitter 72, configured to broadcast the uplink background noise information to a terminal, so that the terminal can determine uplink transmission power according to the received uplink background noise information.
The uplink power control method adopted by the embodiment of the invention is an open loop power control method.
In the embodiment of the invention, the base station broadcasts the uplink background noise information to the terminal so that the terminal can determine the initial uplink transmitting power according to the received uplink background noise information, and the terminal takes the influence of an uplink interference factor (uplink background noise) into consideration when determining the uplink transmitting power and compensates the uplink interference, so that the determined uplink transmitting power is more accurate, and the problems of increase of BLER (block error rate) of data transmitted by the terminal or reduction of the transmission rate of the terminal caused by insufficient uplink transmitting power can be avoided.
The uplink background noise information in the embodiment of the present invention may be information of the uplink background noise itself, or may be information of the uplink background noise rise level.
The uplink background noise information may be a statistical value obtained by the base station performing statistics on the uplink background noise (or the uplink background noise rise level) within a certain time period, and the statistical value may be an average value of the uplink background noise (or the uplink background noise rise level) within a certain time period. When the base station broadcasts the uplink background noise information for the first time, the uplink background noise information may also be a default value.
In this embodiment of the present invention, the base station may broadcast the uplink noise floor information through a system message, where the system message may be, for example, SIB 2. Specifically, the base station may add M (M is greater than or equal to 2) bits to the system message to identify the current uplink background noise information of the base station. For example, when the system message is SIB2, an "uplinkInereferencelevel" field of a new Mbit may be added in SIB2 to identify the current uplink background noise information of the base station.
Since the uplink background noise of the base station may change continuously, it is preferable that, in the embodiment of the present invention,
the processor 71 is further configured to update the uplink background noise information when a difference between the currently detected uplink background noise and the uplink background noise corresponding to the broadcasted uplink background noise information is greater than or equal to a preset threshold and lasts for a certain duration;
the transmitter 72 is further configured to broadcast the updated uplink background noise information.
When determining the uplink transmission power, the terminal generally needs the expected received power sent by the base station, and therefore, the transmitter 72 in this embodiment of the present invention is also used to send the expected received power to the terminal.
Referring to fig. 8, an eighth embodiment of the present invention provides a terminal, including:
a receiver 81, configured to receive uplink background noise information and expected received power broadcasted by a base station;
and the processor 82 is configured to determine uplink transmit power according to the uplink background noise information and the expected received power.
The uplink power control method adopted by the embodiment of the invention is an open loop power control method.
In the embodiment of the invention, the terminal receives the uplink background noise information and the expected receiving power broadcasted by the base station, and determines the initial uplink transmitting power according to the received uplink background noise information and the expected receiving power, and the terminal takes the influence of an uplink interference factor (uplink background noise) into consideration when determining the uplink transmitting power and compensates the uplink interference, so that the determined uplink transmitting power is more accurate, and the problems of increase of BLER (block error rate) of data transmitted by the terminal or reduction of the transmission rate of the terminal caused by insufficient uplink transmitting power can be avoided.
The uplink background noise information in the embodiment of the present invention may be information of the uplink background noise itself, or may be information of the uplink background noise rise level.
The uplink background noise information may be a statistical value obtained by the base station performing statistics on the uplink background noise (or the uplink background noise rise level) within a certain time period, and the statistical value may be an average value of the uplink background noise (or the uplink background noise rise level) within a certain time period. When the base station broadcasts the uplink background noise information for the first time, the uplink background noise information may also be a default value.
In this embodiment of the present invention, the base station may broadcast the uplink noise floor information through a system message, where the system message may be, for example, SIB 2. Specifically, the base station may add M (M is greater than or equal to 2) bits to the system message to identify the current uplink background noise information of the base station. For example, when the system message is SIB2, an "uplinkInereferencelevel" field of a new Mbit may be added in SIB2 to identify the current uplink background noise information of the base station.
In this embodiment of the present invention, the processor 82 is further configured to add a relevant parameter of the uplink background noise information in a calculation formula for calculating the uplink transmission power. For example, β can be added to the calculation formula of the uplink transmission powerc(j)·IoTcWherein IoTcFor upward lifting of bottom noise, betac(j) The compensation coefficient for the uplink interference is a value greater than 0 and less than 1.
Referring to fig. 9, a base station according to a ninth embodiment of the present invention includes:
the processor 91 is configured to determine uplink background noise information according to the current uplink background noise; determining expected receiving power issued to a terminal according to the uplink background noise information;
a transmitter 92 for broadcasting the desired received power to the terminals.
The uplink power control method adopted by the embodiment of the invention is an open loop power control method.
In the embodiment of the invention, the base station determines the expected receiving power issued to the terminal according to the uplink background noise information and directly issues the expected receiving power to the terminal so that the terminal can determine the initial uplink transmitting power according to the received expected receiving power, and the uplink interference is compensated because the influence of an uplink interference factor (uplink background noise) is considered by the expected receiving power received by the terminal, so that the determined uplink transmitting power is more accurate, and the problems of increase of BLER (block error rate) of data transmitted by the terminal or reduction of the transmission rate of the terminal caused by insufficient uplink transmitting power can be avoided.
In the embodiment of the present invention, the base station may send the desired received power to the terminal through a system message or an RRC message.
The uplink background noise information in the embodiment of the present invention may be information of the uplink background noise itself, or may be information of the uplink background noise rise level.
The uplink background noise information may be a statistical value obtained by the base station performing statistics on the uplink background noise (or the uplink background noise rise level) within a certain time period, and the statistical value may be an average value of the uplink background noise (or the uplink background noise rise level) within a certain time period.
Since the uplink background noise of the base station may change continuously, preferably, in some embodiments of the present invention, the processor 91 is further configured to update the uplink background noise information when a difference between the currently detected uplink background noise and the uplink background noise corresponding to the expected received power of the broadcast is greater than or equal to a preset threshold and lasts for a certain time; determining an updated expected received power according to the updated uplink background noise;
the transmitter 92 is further configured to broadcast the updated expected received power to the terminals.
In some other embodiments of the present invention, the processor 91 is further configured to update the uplink background noise information when a difference between the currently detected uplink background noise and the uplink background noise corresponding to the broadcasted expected received power is greater than or equal to a preset threshold and lasts for a certain time; determining an updated expected received power according to the updated uplink background noise; determining an adjustment value for the desired received power based on a difference between the updated desired received power and the broadcasted desired received power;
the transmitter 92 is further configured to transmit the adjustment value of the desired received power to the terminal.
Referring to fig. 10, a terminal according to a tenth embodiment of the present invention includes:
a receiver 101, configured to receive expected received power sent by a base station, where the expected received power is determined by the base station according to uplink background noise information;
and a processor 102, configured to determine uplink transmit power according to the expected received power sent by the base station.
The uplink power control method adopted by the embodiment of the invention is an open loop power control method.
In the embodiment of the invention, the terminal receives the expected receiving power sent by the base station and determines the uplink transmitting power according to the expected receiving power sent by the base station, and the expected receiving power is determined by the base station according to the uplink background noise information, namely the influence of an uplink interference factor (uplink background noise) is considered when the uplink transmitting power is determined to compensate the uplink interference, so that the determined uplink transmitting power is more accurate, and the problems of increase of BLER (block error rate) of data transmitted by the terminal or reduction of the transmission rate of the terminal caused by insufficient uplink transmitting power can be avoided.
In the embodiment of the present invention, the base station may send the desired received power to the terminal through a system message or an RRC message.
The uplink background noise information in the embodiment of the present invention may be information of the uplink background noise itself, or may be information of the uplink background noise rise level.
The uplink background noise information may be a statistical value obtained by the base station performing statistics on the uplink background noise (or the uplink background noise rise level) within a certain time period, and the statistical value may be an average value of the uplink background noise (or the uplink background noise rise level) within a certain time period.
Referring to fig. 11, an eleventh embodiment of the present invention provides a base station, including:
the processor 111 is configured to determine uplink background noise information according to the current uplink background noise; determining a transmitted power control signaling according to the uplink background noise information;
a transmitter 112, configured to send the transmission power control signaling to the terminal.
The uplink power control method adopted by the embodiment of the invention is a closed-loop power control method.
In the embodiment of the invention, the base station sends the transmission power control signaling to the terminal so that the terminal can adjust the uplink transmitting power according to the received transmission power control signaling, and the uplink interference is compensated by considering the influence of an uplink interference factor (uplink background noise) when the transmission power control signaling is determined, so that the uplink transmitting power determined by the terminal is more accurate, and the problems of increase of data BLER transmitted by the terminal or reduction of the transmission rate of the terminal caused by insufficient uplink transmitting power can be avoided.
In the embodiment of the present invention, when determining the transmitted power control signaling, the base station may consider the influence of factors such as measured channel quality (signal-to-noise ratio (SNR)/signal-to-interference plus noise ratio (SINR)), Power Headroom Report (PHR), or target SNR/SINR, in addition to the uplink background noise information.
Referring to fig. 12, a base station according to a twelfth embodiment of the present invention includes:
a receiver 121, configured to receive a transmission power control signaling sent by a base station;
and the processor 122 is configured to adjust the uplink transmit power according to the transmission power control signaling.
The method for controlling the uplink power is a closed-loop power control method.
In the embodiment of the invention, the terminal receives the transmission power control signaling sent by the base station and adjusts the uplink transmission power according to the transmission power control signaling, and the base station takes the influence of an uplink interference factor (uplink background noise) into consideration when determining the transmission power control signaling to compensate the uplink interference, so that the uplink transmission power determined by the terminal is more accurate, and the problems of increase of BLER (block error rate) of data transmitted by the terminal or reduction of the transmission rate of the terminal caused by insufficient uplink transmission power can be avoided.
In the embodiment of the present invention, when determining the transmitted power control signaling, the base station may consider the influence of factors such as measured channel quality (signal-to-noise ratio (SNR)/signal-to-interference plus noise ratio (SINR)), Power Headroom Report (PHR), or target SNR/SINR, in addition to the uplink background noise information.
The embodiment of the invention also provides a base station, which comprises a memory, a processor and a computer program which is stored on the memory and can be run on the processor; the processor implements the above uplink power control method applied to the base station when executing the program.
The embodiment of the invention also provides a terminal, which comprises a memory, a processor and a computer program which is stored on the memory and can be run on the processor; the processor implements the above uplink power control method applied to the terminal when executing the program.
The Base Station in the embodiment of the present invention may be a Base Transceiver Station (BTS) in Global System for Mobile communications (GSM) or Code Division Multiple Access (CDMA), a Base Station (NodeB, NB) in Wideband Code Division Multiple Access (WCDMA), an evolved Node B (eNB, eNodeB) in LTE, a relay Station, an Access point, a Base Station in a future 5G network, and the like, which are not limited herein.
The terminal in the embodiments of the present invention may be a wireless terminal or a wired terminal, and the wireless terminal may be a device providing voice and/or other service data connectivity to a user, a handheld device having a wireless connection function, or other processing devices connected to a wireless modem. A wireless terminal, which may be a mobile terminal such as a mobile telephone (or "cellular" telephone) and a computer having a mobile terminal, e.g., a portable, pocket, hand-held, computer-included, or vehicle-mounted mobile device, may communicate with one or more core networks via a Radio Access Network (RAN), and may exchange language and/or data with the RAN. For example, devices such as Personal Communication Service (PCS) phones, cordless phones, Session Initiation Protocol (SIP) phones, Wireless Local Loop (WLL) stations, and Personal Digital Assistants (PDAs) are used. A wireless Terminal may also be referred to as a system, a Subscriber Unit (Subscriber Unit), a Subscriber Station (Subscriber Station), a Mobile Station (Mobile), a Remote Station (Remote Station), a Remote Terminal (Remote Terminal), an Access Terminal (Access Terminal), a User Terminal (User Terminal), a User Agent (User Agent), and a Terminal (User Device or User Equipment), which are not limited herein.
An embodiment of the present invention further provides a computer-readable storage medium, on which a computer program is stored, where the computer program, when executed by a processor, implements the steps in the uplink power control method applied to the base station.
An embodiment of the present invention further provides a computer-readable storage medium, on which a computer program is stored, where the computer program, when executed by a processor, implements the steps in the uplink power control method applied to the terminal.
Such computer-readable media, which include both non-transitory and non-transitory, removable and non-removable media, may implement information storage by any method or technology. The information may be computer readable instructions, data structures, modules of a program, or other data. Examples of computer storage media include, but are not limited to, phase change memory (PRAM), Static Random Access Memory (SRAM), Dynamic Random Access Memory (DRAM), other types of Random Access Memory (RAM), Read Only Memory (ROM), Electrically Erasable Programmable Read Only Memory (EEPROM), flash memory or other memory technology, compact disc read only memory (CD-ROM), Digital Versatile Discs (DVD) or other optical storage, magnetic cassettes, magnetic tape magnetic disk storage or other magnetic storage devices, or any other non-transmission medium that can be used to store information that can be accessed by a computing device.
While the foregoing is directed to the preferred embodiment of the present invention, it will be understood by those skilled in the art that various changes and modifications may be made without departing from the spirit and scope of the invention as defined in the appended claims.
Claims (21)
1. An uplink power control method applied to a base station is characterized by comprising the following steps:
determining uplink background noise information according to the current uplink background noise;
broadcasting the uplink background noise information to a terminal so that the terminal can determine uplink transmitting power according to the received uplink background noise information; wherein, the terminal adds beta in the calculation formula for calculating the uplink transmitting power according to the uplink background noise information and the expected receiving power broadcasted by the base stationc(j)·IoTcTo determine the uplink transmit power, IoTcFor the ascending bottom noise or ascending bottom noise rising level, betac(j) The compensation coefficient for the uplink interference is a value greater than 0 and less than 1.
2. The uplink power control method according to claim 1, wherein the step of broadcasting the uplink background noise information is followed by further comprising:
updating the uplink background noise information when the difference value between the currently detected uplink background noise and the uplink background noise corresponding to the broadcasted uplink background noise information is greater than or equal to a preset threshold value and lasts for a certain time;
and broadcasting the updated uplink background noise information.
3. The uplink power control method according to claim 1, wherein the uplink background noise information is carried by a system message.
4. The uplink power control method of claim 3, wherein the system message is a SIB2 message.
5. An uplink power control method applied to a terminal is characterized by comprising the following steps:
receiving uplink background noise information and expected receiving power broadcast by a base station;
determining uplink transmitting power according to the uplink background noise information broadcast by the base station and the expected receiving power, wherein the determining comprises the following steps: increasing beta in a calculation formula for calculating uplink transmitting powerc(j)·IoTcWherein IoTcFor the ascending bottom noise or ascending bottom noise rising level, betac(j) The compensation coefficient for the uplink interference is a value greater than 0 and less than 1.
6. An uplink power control method applied to a base station is characterized by comprising the following steps:
determining uplink background noise information according to the current uplink background noise;
determining expected receiving power issued to a terminal according to the uplink background noise information; wherein, the terminal adds beta in the calculation formula for calculating the uplink transmitting power according to the uplink background noise information and the expected receiving power broadcasted by the base stationc(j)·IoTcTo determine the uplink transmit power, IoTcFor the ascending bottom noise or ascending bottom noise rising level, betac(j) The compensation coefficient of the uplink interference is a numerical value which is greater than 0 and less than 1;
broadcasting the desired received power to the terminal.
7. The uplink power control method according to claim 6, wherein the step of broadcasting the desired received power to the terminal is followed by further comprising:
updating the uplink background noise information when the difference value between the currently detected uplink background noise and the uplink background noise corresponding to the expected receiving power is greater than or equal to a preset threshold value and lasts for a certain time;
determining an updated expected received power according to the updated uplink background noise;
broadcasting the updated desired received power to the terminal.
8. The uplink power control method according to claim 6, wherein the step of broadcasting the desired received power to the terminal is followed by further comprising:
updating the uplink background noise information when the difference value between the currently detected uplink background noise and the uplink background noise corresponding to the expected receiving power is greater than or equal to a preset threshold value and lasts for a certain time;
determining an updated expected received power according to the updated uplink background noise;
determining an adjustment value for the desired received power based on a difference between the updated desired received power and the broadcasted desired received power;
the adjustment value of the desired reception power is transmitted to the terminal.
9. An uplink power control method applied to a terminal is characterized by comprising the following steps:
receiving expected receiving power sent by a base station, wherein the expected receiving power is determined by the base station according to uplink background noise information;
determining uplink transmission power according to the expected received power sent by the base station, including: increasing beta in a calculation formula for calculating uplink transmitting powerc(j)·IoTcWherein IoTcFor the ascending bottom noise or ascending bottom noise rising level, betac(j) The compensation coefficient for the uplink interference is a value greater than 0 and less than 1.
10. A base station, comprising:
the processor is used for determining uplink background noise information according to the current uplink background noise;
the transmitter is used for broadcasting the uplink background noise information to the terminal so that the terminal can determine uplink transmitting power according to the received uplink background noise information; wherein, the terminal adds beta in the calculation formula for calculating the uplink transmitting power according to the uplink background noise information and the expected receiving power broadcasted by the base stationc(j)·IoTcTo determine the uplink transmit power, IoTcFor the ascending bottom noise or ascending bottom noise rising level, betac(j) The compensation coefficient for the uplink interference is a value greater than 0 and less than 1.
11. The base station of claim 10,
the processor is further configured to update the uplink background noise information when a difference between the currently detected uplink background noise and the uplink background noise corresponding to the broadcasted uplink background noise information is greater than or equal to a preset threshold and lasts for a certain duration;
and the transmitter is also used for broadcasting the updated uplink background noise information.
12. The base station of claim 10, wherein the uplink background noise information is carried by a system message.
13. The base station of claim 12, wherein the system message is a SIB2 message.
14. A terminal, comprising:
the receiver is used for receiving the uplink background noise information and the expected receiving power broadcasted by the base station;
the processor is used for determining uplink transmitting power according to the uplink background noise information and the expected receiving power;
the processor is further configured to increase β in a calculation formula for calculating uplink transmit powerc(j)·IoTcWherein IoTcFor the ascending bottom noise or ascending bottom noise rising level, betac(j) The compensation coefficient for the uplink interference is a value greater than 0 and less than 1.
15. A base station, comprising:
the processor is used for determining uplink background noise information according to the current uplink background noise; determining expected receiving power issued to a terminal according to the uplink background noise information; wherein, the terminal adds beta in the calculation formula for calculating the uplink transmitting power according to the uplink background noise information and the expected receiving power broadcasted by the base stationc(j)·IoTcTo determine the uplink transmit power, IoTcFor the ascending bottom noise or ascending bottom noise rising level, betac(j) The compensation coefficient of the uplink interference is a numerical value which is greater than 0 and less than 1;
a transmitter for broadcasting the desired received power to a terminal.
16. The base station of claim 15,
the processor is further configured to update the uplink background noise information when a difference between the currently detected uplink background noise and the uplink background noise corresponding to the broadcasted expected received power is greater than or equal to a preset threshold and lasts for a certain duration; determining an updated expected received power according to the updated uplink background noise;
the transmitter is further configured to broadcast the updated expected received power to the terminal.
17. The base station of claim 15,
the processor is further configured to update the uplink background noise information when a difference between the currently detected uplink background noise and the uplink background noise corresponding to the broadcasted expected received power is greater than or equal to a preset threshold and lasts for a certain duration; determining an updated expected received power according to the updated uplink background noise; determining an adjustment value for the desired received power based on a difference between the updated desired received power and the broadcasted desired received power;
the transmitter is further configured to transmit the adjustment value of the desired received power to the terminal.
18. A terminal, comprising:
the receiver is used for receiving expected receiving power sent by a base station, and the expected receiving power is determined by the base station according to uplink background noise information;
a processor, configured to determine uplink transmit power according to an expected received power sent by the base station, including: increasing beta in a calculation formula for calculating uplink transmitting powerc(j)·IoTcWherein IoTcFor the ascending bottom noise or ascending bottom noise rising level, betac(j) The compensation coefficient for the uplink interference is a value greater than 0 and less than 1.
19. A base station comprising a memory, a processor and a computer program stored on the memory and executable on the processor; wherein the processor executes the program to implement the uplink power control method according to any one of claims 1 to 4 and 6 to 8.
20. A terminal comprising a memory, a processor and a computer program stored on the memory and executable on the processor; wherein the processor implements the uplink power control method according to any one of claim 5 or claim 9 when executing the program.
21. A computer-readable storage medium, on which a computer program is stored, which, when being executed by a processor, carries out the steps of the uplink power control method according to any one of claims 1 to 9.
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| CN1512802A (en) * | 2002-12-27 | 2004-07-14 | 皇家飞利浦电子股份有限公司 | Mobile terminal with power control and method |
| EP2249610A2 (en) * | 2009-05-07 | 2010-11-10 | Picochip Designs Limited | Methods and devices for reducing interference of a femtocell in an uplink |
| CN106454954A (en) * | 2015-08-13 | 2017-02-22 | 中兴通讯股份有限公司 | Method and device of transmitting SIB7 by RIM message |
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| US9307420B2 (en) * | 2010-10-01 | 2016-04-05 | Telefonaktiebolaget L M Ericsson | Load estimation in frequency domain pre-equalization systems |
| CN103379604B (en) * | 2012-04-20 | 2018-04-27 | 北京三星通信技术研究有限公司 | Ascending power control method in dynamic TDD cell |
| CN104105188B (en) * | 2013-04-12 | 2019-10-11 | 北京三星通信技术研究有限公司 | A kind of ascending power control method in more subframe schedulings |
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| CN1512802A (en) * | 2002-12-27 | 2004-07-14 | 皇家飞利浦电子股份有限公司 | Mobile terminal with power control and method |
| EP2249610A2 (en) * | 2009-05-07 | 2010-11-10 | Picochip Designs Limited | Methods and devices for reducing interference of a femtocell in an uplink |
| CN106454954A (en) * | 2015-08-13 | 2017-02-22 | 中兴通讯股份有限公司 | Method and device of transmitting SIB7 by RIM message |
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