CN110022601B - Method and device for controlling signal power, storage medium and equipment - Google Patents
Method and device for controlling signal power, storage medium and equipment Download PDFInfo
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- CN110022601B CN110022601B CN201910294477.8A CN201910294477A CN110022601B CN 110022601 B CN110022601 B CN 110022601B CN 201910294477 A CN201910294477 A CN 201910294477A CN 110022601 B CN110022601 B CN 110022601B
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W52/00—Power management, e.g. TPC [Transmission Power Control], power saving or power classes
- H04W52/04—TPC
- H04W52/18—TPC being performed according to specific parameters
- H04W52/24—TPC being performed according to specific parameters using SIR [Signal to Interference Ratio] or other wireless path parameters
- H04W52/242—TPC being performed according to specific parameters using SIR [Signal to Interference Ratio] or other wireless path parameters taking into account path loss
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W52/00—Power management, e.g. TPC [Transmission Power Control], power saving or power classes
- H04W52/04—TPC
- H04W52/52—TPC using AGC [Automatic Gain Control] circuits or amplifiers
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Abstract
The application discloses a method, a device, a storage medium and equipment for controlling signal power, wherein the method comprises the following steps: obtaining power for transmitting a data signal to a second node; transmitting a data signal to the second node with power; and receiving an adjusting instruction which is fed back by the second node and is used for adjusting the power, and sending a data signal to the second node by the adjusted power. By the embodiment of the application, the data packet loss of the node with the closer distance can be avoided.
Description
Technical Field
The present disclosure relates to the field of wireless MESH networks, and in particular, to a method, an apparatus, a storage medium, and a device for controlling signal power.
Background
Any topological Network can be presented among nodes forming a wireless MESH Network (Wrieless MESH Network), and in practical application, the situation that two or more nodes in the wireless MESH Network are very close to each other often occurs; taking two nodes with a close distance as an example, when one node sends a signal (a signaling signal or a data signal) to another node with a preset sending power, because the distance between the two nodes is close, the path loss is small, when the signal is transmitted to the other node, the other node needs to receive the signal with a large receiving power, when the receiving power of the other node is greater than the bearing capacity of the radio frequency front section, the signal-to-noise ratio of the signal received by the other node is reduced, at this time, the other node cannot receive the signal at the peak transmission rate, and when the signal is the data signal, a phenomenon of data packet loss may occur.
Therefore, a signal power control method is needed to avoid packet loss of data transmitted by a node with a short distance.
Disclosure of Invention
Based on this, the present application provides a method for controlling signal power, so as to avoid packet loss of data transmitted by a node with a close distance.
The application also provides a control device, a storage medium and equipment of the signal power, which are used for ensuring the realization and the application of the method in practice.
The technical scheme provided by the application is as follows:
the application discloses a control method of signal power, which is applied to a first node in a wireless MESH network and comprises the following steps:
obtaining power of transmitting a data signal to a second node;
transmitting a data signal to the second node at the power;
receiving an adjustment instruction for adjusting the power fed back by the second node, adjusting the power, and sending the data signal to the second node with the adjusted power.
Optionally, the method further includes:
and keeping the power for sending the signaling signal to the nodes in the wireless MESH network as preset power.
Optionally, before obtaining the power of the data signal sent to the second node, the method further includes:
determining a target node establishing a neighbor relation with the first node;
determining a power at which to transmit a data signal to the target node; and the target node of the first node which needs to send data currently is the second node.
Optionally, for any one of the target nodes, the determining the power for transmitting the data signal to the target node includes:
determining the actual received power of the signaling signal sent to the target node;
calculating a difference value between the preset power and the actual receiving power to obtain a path loss estimated value of a transmission signal between the target node and the target node;
and calculating the sum of the estimated path loss value and the preset data signal receiving power of the target node to obtain the power for sending the data signal to the target node.
Optionally, the determining a target node that establishes a neighbor relationship with the first node includes:
detecting a signaling signal received in a preset period every other preset period;
determining a sending node corresponding to the signaling signal meeting the preset condition as a target node; the preset conditions include: and detecting at least a second preset number of preset periods among the first preset number of preset periods closest to the current time.
Optionally, the method further includes:
if the power to be received of the data signal to be received is not equal to the target receiving power, sending an instruction for adjusting the sending power of the data signal to be received to an opposite terminal until the power to be received of the data signal to be received sent by the opposite terminal is the target receiving power; the target received power is the received power at which the first node reaches a peak transmission rate;
and receiving the data signal to be received.
Optionally, the receiving the data signal to be received includes:
and receiving the data signal to be received by preset automatic gain control.
Optionally, the method further includes:
under the condition that a signaling signal sent by an opposite terminal needs to be received, acquiring a received signal strength indication of the signaling signal sent by the opposite terminal last time;
determining automatic gain control based on the received signal strength indication;
and receiving the signaling signal currently sent by the opposite terminal by the automatic gain control.
The application also discloses a control device of signal power, including:
a memory for storing a program;
a processor for executing the program, wherein the processor implements any one of the methods described above when executing the program.
The present application also discloses a computer-readable storage medium having a computer program stored thereon, the computer program being executable by a processor to implement any of the above methods.
The beneficial effect of this application does:
in the embodiment of the application, aiming at any node in a wireless MESH network, the power for sending a data signal to a second node is obtained, and the data signal is sent to the second node by the obtained power; when the second node cannot receive data in the data signal at the peak transmission speed, the node receives an adjustment instruction which is fed back by the second node and used for adjusting the sending power of the data signal, at this time, the node adjusts the sending power of the data signal and sends the data signal to the second node at the adjusted sending power of the data signal, therefore, as long as the adjustment instruction which is fed back by the second node and used for adjusting the power is received, the node adjusts the power and sends the data signal to the second node at the adjusted power, so that the second node receives the data in the data signal at the peak transmission rate, and the packet loss of the data transmitted by the closer node is avoided. Therefore, the embodiment of the application can avoid the data packet loss of the nodes with close distances in the transmission process.
Drawings
In order to more clearly illustrate the embodiments of the present application or the technical solutions in the prior art, the drawings needed to be used in the description of the embodiments or the prior art will be briefly introduced below, it is obvious that the drawings in the following description are only embodiments of the present application, and for those skilled in the art, other drawings can be obtained according to the provided drawings without creative efforts.
FIG. 1 is a flow chart of an embodiment of a method for controlling signal power according to the present application;
FIG. 2 is a flowchart of another embodiment of a method for controlling signal power;
FIG. 3 is a schematic structural diagram of an embodiment of a signal power control apparatus according to the present application;
fig. 4 is a schematic structural diagram of a device for controlling signal power according to the present application.
Detailed Description
The technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the drawings in the embodiments of the present application, and it is obvious that the described embodiments are only a part of the embodiments of the present application, and not all of the embodiments. All other embodiments obtained by a person of ordinary skill in the art based on the embodiments in the present application without making any creative effort belong to the protection scope of the present application.
The embodiment of the application is applied to nodes in the MESH network, and for convenience of description, each node in the MESH network is called a first node; for convenience of description, the first node is described below by taking node a as an example.
Fig. 1 shows an embodiment of a method for controlling signal power in the present application, which includes the following steps:
step 101: and maintaining the preset signaling signal sending power every other target preset period, and sending signaling signals to other nodes in the wireless MESH network.
In this embodiment, specific values of the preset signaling signal transmission power need to be determined by a person skilled in the art according to a topology structure of nodes in the wireless MESH network, the signaling signal transmission power required by signaling signal communication between the two farthest nodes is determined, and the signaling signal transmission power not less than the determined signaling signal transmission power is determined as the preset signaling signal transmission power.
Each node in the wireless MESH network sends signaling signals to other nodes in the wireless MESH network every other preset target period, and each node also receives the signaling signals sent by other nodes in the wireless MESH network. For example, for a node a, every other preset target period, the preset signaling signal transmission power is maintained to transmit a signaling signal to other nodes in the wireless MESH network; node a also receives signaling signals transmitted from other nodes in the wireless MESH network.
For node a, data signals can only be sent to target nodes that have established a neighbor relationship with node a. For the node a, the process of determining the target node having established the neighbor relation with the node a may include the following steps 102 to 104:
step 102: and detecting the signaling signals received in the preset period every other preset period.
In this step, the preset period is a preset time period, and every other preset time period, the signaling signal received by the node in the preset time period is detected, and in practical application, the received signaling signal carries the node identifier for sending the signaling signal.
Step 103: and determining the signaling signals meeting the preset conditions from the received signaling signals.
In this step, the preset condition is that at least a second preset number of preset cycles are detected in a first preset number of preset cycles closest to the current time. The value of the first preset number is not less than the value of the second preset number, specifically, the value of the first preset number and the value of the second preset number may be determined according to an actual situation, and the specific threshold values of the first preset number and the second preset number are not limited in this embodiment. For example, if the value of the first preset number is 5 and the value of the second preset number is 3, in this step, signaling signals detected in not less than 3 preset periods from signaling signals received in 5 preset periods closest to the current time are determined as signaling signals meeting the preset condition.
Step 104: and determining a target node for establishing the neighbor relation according to the node identification carried by the signaling signal meeting the preset condition.
After the signaling signal meeting the preset condition is determined, the node identification carried by the signaling signal meeting the preset condition is identified, the node represented by the identified node identification is determined, the determined node is the target node for establishing the neighbor relation, and when the data signal needs to be sent to the target node, the data signal can be directly sent to the target node.
In this embodiment, for the target node of the node a, when the node a needs to transmit the data signal to the target node, the data signal may be directly transmitted to the target node.
It should be noted that, in this embodiment, after the node a determines the target node, the node a also determines, at each preset period, that the target node currently corresponding to the node a, that is, the target node of the node a may be changed.
Step 105: a data signal transmit power for transmitting a data signal to the second node is determined.
In this embodiment, the second node indicates a target node, which is currently required by the node a to send data, among the determined target nodes. For example, the node A determines that the target nodes establishing the neighbor relation are respectively a target node B, a target node C and a target node D; currently, node a needs to send a data signal to the target node B, and at this time, the target node B is the second node in this step.
Specifically, the process of determining the power for transmitting the data signal to the second node may include steps a1 to A3:
step A1: and determining the signaling signal receiving power for actually receiving the signaling signal sent by the second node.
The node may obtain the received power of the signaling signal sent to the second node in the last preset period, and determine the obtained received power as the signaling signal received power of the signaling signal actually sent by the target node.
For example, for a second node B of the node a, the node a may obtain a received power of a signaling signal sent by the second node B in a last preset period, and determine the obtained received power as a signaling signal received power at which the node a actually receives the signaling signal sent by the second node B.
Step A2: an estimate of path loss for a signal transmitted to and from the second node is determined.
After the actual receiving power of the signaling signal sent to the second node is determined, since in this embodiment, each node in the wireless MESH network sends the signaling signal to other nodes at the preset signaling signal sending power, it can be obtained that the signaling signal sending power at which the second node sends the signaling signal to the node is the preset signaling signal sending power.
According to the preset signaling signal sending power of the signaling signal sent by the second node and the receiving power of the node for the signaling signal when the signaling signal is transmitted to the node, the estimated path loss value of the signaling signal in the process of being transmitted from the second node to the node can be obtained. Specifically, the estimated pathloss value is a difference between a preset signaling signal transmission power and an actual received power of the signaling signal.
For example, the current node a acquires actual received power of a signaling signal sent to the second node B, and preset signaling signal sending power is preset in the node a, where the preset signaling signal sending power is used when the second node B sends the signaling signal to the node a; therefore, the node a determines the difference between the preset signaling signal transmission power and the obtained actual received power as the estimated path loss for transmitting signals with the second node.
Step A3: a data signal transmit power for transmitting a data signal to the second node is determined.
In the present embodiment, a data signal reception power indicating the reception power of a data signal transmitted by the node by the second node is expected to be preset in each node. In this step, the sum of the preset data signal reception power and the estimated path loss value is used to determine the data signal transmission power for transmitting the data signal to the second node.
For example, the node a determines that the estimated path loss between the node a and the second node B is 80dbm, and the preset received power of the data signal by the second node B is-90 dbm, the node a determines the sum of the estimated path loss and the preset received power of the data signal (the sum of 80dbm and-90 dbm) as the transmission power of the data signal for transmitting the data signal to the second node B, i.e., the transmission power of the data signal for transmitting the data signal to the second node B by the node a is-10 dbm.
In practical applications, when each node in the wireless MESH network can receive data at a peak transmission rate, the actual receiving power must be within the preset receiving power range corresponding to the node, and the preset receiving power ranges corresponding to different nodes reaching the peak transmission rate are different. The preset data signal received power may be set to an estimate that the node has reached a lower received power limit corresponding to the peak transmission rate. For example, a typical node in a wireless MESH network receives data up to a peak transmission rate in a receive power range of typically [ -70dbm, -90dbm ], at which time the preset data signal receive power may be set to a value near-90 dbm. Calculating the data signal sending power for sending the data signal to the target signal, sending the data signal to the second node by the data signal sending power, wherein when the data signal is transmitted to the second node, the receiving power of the second node to the data signal is close to-90 dbm; even if the power is less than-90 dbm, the receiving power of the second node for receiving the data at the peak transmission rate is close to-90 dbm after subsequent adjustment, so that the second node can receive the data at the peak transmission rate, the transmitting power of the data signal used for transmitting the data signal to the second node by the node is lower, the power consumption of the node is reduced, and the working time of the node is prolonged.
Step 106: and transmitting the data signal to the second node at the determined data signal transmission power.
For example, node a transmits a data signal to the second node B at the determined data signal transmission power.
In practical applications, if the power for transmitting the data signal to the second node is determined in advance, the data signal is transmitted to the second node at the acquired data signal transmission power in this step.
Step 107: and under the condition of receiving an adjusting instruction which is fed back by the second node and is used for adjusting the data signal transmitting power, and transmitting the data signal to the second node by using the adjusted data signal transmitting power.
In this embodiment, after the data signal is transmitted to the second node at the determined data signal transmission power, the actual path loss value of the data signal during transmission from the node to the second node may not be equal to the estimated path loss value, and the actual receiving power of the data signal by the second node when the data signal is transmitted to the second node may not enable the second node to receive the data signal at the peak transmission rate. For a data Signal to be received transmitted to a second node, if the second node cannot receive the data Signal to be received at a peak transmission rate, the second node feeds back an adjustment instruction to the first node, where the fed-back adjustment instruction may include an adjustment direction prompting the node to adjust the data Signal transmission Power or a Reference Signal Receiving Power (RSRP), where the adjustment direction may include increasing the data Signal transmission Power and decreasing the data Signal transmission Power, and the RSRP is a unit subcarrier RSRP calculated by the second node according to a signaling Signal (transmission end fixed Power) received from the first node.
After receiving an adjusting instruction sent by a second node, a first node adjusts the sending power of a data signal used for sending the data signal to the second node according to the adjusting direction or RSRP contained in the adjusting instruction; and transmitting the data signal to the second node with the adjusted data signal transmission power; and if an adjusting instruction which is fed back by the second node and is used for adjusting the data signal sending power is received, then adjusting the data signal sending power for sending the data signal to the second node, and sequentially circulating until the second node can receive the data signal at the peak transmission rate.
It should be noted that, in practical application, the first node may also serve as a receiving end of the data signal, that is, another node (opposite end) sends the data signal to the first node, and if the data signal transmitted to the first node does not obtain the data signal that the first node receives at the peak transmission rate, the first node sends an adjustment instruction to the opposite end according to the same adjustment manner as the second node until the data signal to be received can be received at the peak transmission rate, and receives the data signal to be received by using the preset automatic gain control.
In this embodiment, for each node in the wireless MESH network, the transmission power of the signaling signal used is not controlled when the signaling signal is transmitted, that is, the transmission power of the signaling signal is kept preset to transmit the signaling signal to other nodes in the wireless MESH network; only the data signal transmission power used for transmitting the data signal is controlled.
In order to avoid saturation of a digital domain, when a node receives a signaling signal sent by a target node, a received signal strength indication of the signaling signal sent by the target node at the last time is obtained, and automatic gain control for receiving the signaling signal of the target node is determined according to the obtained received signal strength indication; and receiving the signaling signal currently sent by the target node by the determined automatic gain control. When the target node sends a data signal to the node, the target node already controls the data signal sending power for sending the data signal to the node, and when the node receives the data signal from the target node, the data signal sent by the target node is only needed to be received by the preset automatic gain control.
The method embodiment corresponding to fig. 1 is a preferred embodiment in the embodiments of the present application, and in practical application, for a first node (any one node) in a wireless MESH network, as shown in fig. 2, the method for controlling signal power includes:
step 201: the power of the data signal transmitted to the second node is obtained.
In this embodiment, the power at which the data signal is transmitted to the second node is determined in advance. When the data signal needs to be sent to the second node, the power for sending the data signal to the second node is directly obtained. Specifically, the step 104 may be referred to in the process of determining the transmission power for transmitting the data signal to the second node, and is not described herein again.
Step 202: and transmitting the data signal to the second node with the acquired power.
The step 105 may be implemented as parameters, which are not described herein again.
Step 203: and receiving an adjusting instruction which is fed back by the second node and used for adjusting the power, and sending a data signal to the second node by using the adjusted power.
For specific implementation, reference may be made to step 105 to step 107, which are not described herein again.
Referring to fig. 3, a device for controlling signal power in the present application is shown, which may include:
an obtaining unit 301, configured to obtain power of sending a data signal to a second node;
a first transmitting unit 302, configured to transmit a data signal to a second node with power;
the adjusting unit 303 is configured to receive an adjustment instruction for adjusting power fed back by the second node, adjust the power, and send a data signal to the second node with the adjusted power.
Optionally, the apparatus embodiment may further include:
and the second sending unit is used for keeping the power of the signaling signal sent to the nodes in the wireless MESH network as preset power.
Optionally, the apparatus embodiment may further include:
a first determining unit, configured to determine a target node that establishes a neighbor relationship with a first node before the obtaining unit 301 obtains the power for sending the data signal to the second node;
a second determining unit for determining power of transmitting a data signal to the target node; the target node of the first node which needs to send data at present is the second node.
Optionally, for any target node, the second determining unit may include:
a first determining subunit, configured to determine actual received power of a signaling signal sent to a target node;
the first calculating subunit is used for calculating a difference value between the preset power and the actual receiving power to obtain a path consumption estimated value of a transmission signal between the first calculating subunit and a target node;
and the second calculating subunit is used for calculating the sum of the estimated path loss value and the preset data signal receiving power of the target node to obtain the power for sending the data signal to the target node.
Optionally, the first determining unit may include:
the detection subunit is used for detecting the signaling signals received in the preset period every other preset period;
the second determining subunit is configured to determine, as the target node, the sending node corresponding to the signaling signal that meets the preset condition; the preset conditions include: and in the first preset number of preset cycles nearest to the current time, at least a second preset number of preset cycles are detected.
Optionally, the apparatus in this embodiment may further include:
the adjustment instruction sending unit is used for sending an instruction for adjusting the sending power of the data signal to be received to the opposite terminal if the power to be received of the data signal to be received is not equal to the target receiving power until the power to be received of the data signal to be received sent by the opposite terminal is the target receiving power; the target received power is the received power at which the first node reaches the peak transmission rate;
a receiving unit, configured to receive a data signal to be received.
Optionally, the receiving unit is specifically configured to receive the data signal to be received by using preset automatic gain control.
Optionally, the apparatus in this embodiment may further include:
a received signal strength indication obtaining unit, configured to obtain a received signal strength indication of a signaling signal sent by an opposite end last time when the signaling signal sent by the opposite end needs to be received;
an automatic gain control determination unit for determining automatic gain control based on the received signal strength indication;
and the signaling signal sending unit is used for receiving the signaling signal currently sent by the opposite terminal by automatic gain control.
Fig. 4 is a schematic structural diagram of a control device for signal power in the present application, where the control device may include:
a memory for storing a program;
and a processor, configured to execute the program in the memory, and when executing the program in the memory, the processor implements the method embodiment corresponding to fig. 1 and 2.
The present application also provides a computer readable storage medium having a computer program stored thereon, the computer program being for execution by a processor to perform the method of any of the above-mentioned fig. 1 or fig. 2.
The embodiments are described in a progressive manner in the specification, each embodiment focuses on differences from other embodiments, and the same and similar parts among the embodiments are referred to each other. In this document, relational terms such as "first" and "second," and the like, may be used solely to distinguish one entity or action from another entity or action without necessarily requiring or implying any actual such relationship or order between such entities or actions. The terms "comprising," "including," and the like, herein are to be construed in an inclusive sense as opposed to an exclusive or exhaustive sense; that is, the meaning of "includes but is not limited to". The invention can be applied to various fields, such as a mobile phone, a mobile phone.
The previous description of the disclosed embodiments is provided to enable any person skilled in the art to make or use the present application. Various modifications to these embodiments will be readily apparent to those skilled in the art, and the generic principles defined herein may be applied to other embodiments without departing from the spirit or scope of the application. Thus, the present application is not intended to be limited to the embodiments shown herein but is to be accorded the widest scope consistent with the principles and novel features disclosed herein.
Claims (9)
1. A method for controlling signal power, applied to a first node in a wireless MESH network, comprising:
obtaining power of transmitting a data signal to a second node;
transmitting a data signal to the second node at the power;
receiving an adjusting instruction which is fed back by the second node and is used for adjusting the power, and adjusting the power; and transmitting the data signal to the second node at the adjusted power; the adjusting instruction comprises adjusting direction or reference signal receiving power;
if the power to be received of the data signal to be received is not equal to the target receiving power, sending an instruction for adjusting the sending power of the data signal to be received to an opposite terminal until the power to be received of the data signal to be received sent by the opposite terminal is the target receiving power; the target received power is the received power at which the first node reaches a peak transmission rate; and receiving the data signal to be received.
2. The method of claim 1, further comprising:
and keeping the power of the signaling signal sent to the nodes in the wireless MESH network as preset power.
3. The method of claim 1, wherein prior to said obtaining power for transmitting data signals to the second node, further comprising:
determining a target node establishing a neighbor relation with the first node;
determining a power at which to transmit a data signal to the target node; and the target node of the first node which needs to send data currently is the second node.
4. The method of claim 3, wherein for any of the target nodes, the determining the power at which to transmit a data signal to the target node comprises:
determining the actual received power of the signaling signal sent to the target node;
calculating a difference value between a preset power and the actual receiving power to obtain a path loss estimated value of a transmission signal between the target node and the target node;
and calculating the sum of the estimated path loss value and the preset data signal receiving power of the target node to obtain the power of sending the data signal to the target node.
5. The method of claim 3, wherein determining the target node that establishes the neighbor relationship with the first node comprises:
detecting a signaling signal received in a preset period every other preset period;
determining a sending node corresponding to the signaling signal meeting the preset condition as a target node; the preset conditions include: and detecting at least a second preset number of preset periods in the first preset number of preset periods closest to the current.
6. The method of claim 1, wherein the receiving the data signal to be received comprises:
and receiving the data signal to be received by preset automatic gain control.
7. The method of claim 1, further comprising:
under the condition that a signaling signal sent by an opposite terminal needs to be received, acquiring a received signal strength indication of the signaling signal sent by the opposite terminal which is received last time;
determining automatic gain control based on the received signal strength indication;
and receiving the signaling signal currently sent by the opposite terminal by the automatic gain control.
8. An apparatus for controlling signal power, comprising:
a memory for storing a program;
a processor for executing the program, the processor implementing the method of any one of claims 1 to 7 when executing the program.
9. A computer-readable storage medium, having stored thereon a computer program for execution by a processor to perform the method of any one of claims 1 to 7.
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