WO2013082985A1

WO2013082985A1 - Device transmit power control method, apparatus and system

Info

Publication number: WO2013082985A1
Application number: PCT/CN2012/084147
Authority: WO
Inventors: 张向东; 常俊仁; 时洁; 刘培
Original assignee: 华为技术有限公司
Priority date: 2011-12-07
Filing date: 2012-11-06
Publication date: 2013-06-13
Also published as: CN102404837A; CN102404837B

Abstract

Disclosed are a device transmit power control method, apparatus and system. The method includes: acquiring the maximum interference signal power that can be accepted by an access device on a communication resource, the communication resource being used for communications between a sending device and a receiving device; obtaining the maximum transmit power on the communication resource according to the path loss of the access device and the maximum interference signal power; obtaining the minimum transmit power on the communication resource according to the path loss of the access device and the minimum receiving power of the receiving device, the minimum receiving power of the receiving device being the minimum receiving power required for correctly receiving a signal; and determining the transmit power used when communicating with the receiving device according to the maximum transmit power and the minimum transmit power. The present invention can solve the problems that the transmit power is too large and it causes interference to the access device or other users, and the transmit power is too small and a signal cannot be sent out correctly.

Description

TECHNICAL FIELD The present invention relates to the field of communications technologies, and in particular, to a method, an apparatus, and a system for controlling transmission power of a device. BACKGROUND OF THE INVENTION Communication technology of device to device (D2D), as a kind of Internet of Things application, is receiving more and more attention. The D2D communication technology mainly utilizes the communication resources of the existing cellular communication network to realize direct communication between the two devices without passing through the base station. The advantage of this type of communication is that there is no need to establish a dedicated communication channel to the base station, saving base station resources.

In D2D communication applications, the primary problem is how to perform reasonable transmit power control, so that D2D devices can multiplex the communication resources of cellular communication without affecting existing cellular communication. The implementation scheme of the existing D2D communication is D2D network-assisted, device-autonomous D2D communication. The D2D communication mode provides information about all communication resources in the network from the access device to the D2D device, and the D2D device independently selects the communication station according to the communication resource information. Communication resources used.

When the communication scheme of the D2D device is implemented, at least the following problems exist in the prior art: Since the D2D device independently selects the communication resource according to the communication resource information, the access device cannot

The D2D device performs transmission power control.

SUMMARY OF THE INVENTION Embodiments of the present invention provide a method, apparatus, and system for device transmit power control, which are capable of performing transmit power control on a D2D device.

Embodiments of the present invention provide a method for controlling transmission power of a device, including:

Obtaining a maximum interference signal power that the access device can receive on the communication resource, where the communication resource is used by the sending device to communicate with the receiving device; Obtaining a maximum transmit power on the communication resource according to a path loss to the access device and the maximum interference signal power;

Obtaining a minimum transmit power on the communication resource according to the path loss to the receiving device and a minimum received power of the receiving device, where a minimum received power of the receiving device is required for the receiving device to correctly receive a signal Minimum received power;

The transmit power used in communication with the receiving device is determined based on the maximum transmit power and the minimum transmit power.

An embodiment of the present invention provides a device for controlling transmission power of a device, including:

An acquiring unit, configured to acquire a maximum interference signal power that the access device can receive on the communication resource, where the communication resource is used by the sending device to communicate with the receiving device;

a first processing unit, configured to obtain a maximum transmit power on the communication resource according to a path loss to the access device and the maximum interference signal power;

The first processing unit is further configured to obtain a minimum transmit power on the communication resource according to the path loss to the receiving device and a minimum received power of the receiving device, where a minimum received power of the receiving device is The receiving device is capable of correctly receiving the minimum received power required for the signal; the first processing unit is further configured to determine, according to the maximum transmit power and the minimum transmit power, a transmit power used when communicating with the receiving device.

The embodiment of the invention provides a system for transmitting power control of a device, including:

a sending device, configured to acquire a maximum interference signal power that the access device can receive on the communication resource, where the communication resource is used by the sending device to communicate with the receiving device, according to the path loss to the access device and the maximum interference signal The power obtains a maximum transmit power on the communication resource, and obtains a minimum transmit power on the communication resource according to the path loss to the receiving device and a minimum received power of the receiving device, and the minimum received power of the receiving device a minimum received power required for the receiving device to correctly receive a signal, and determining, according to the maximum transmit power and the minimum transmit power, a transmit power used when communicating with the receiving device;

Receiving device, configured to be determined according to the sending device

Line communication An access device, configured to send, to the sending device, a maximum interference signal power that the access device can receive on a communication resource.

The method, device and system for transmitting power control of a device provided by the embodiment of the present invention can be based on the path loss of the transmitting device to the access device and the maximum interference signal power that the access device can accept and the path loss and reception of the transmitting device to the receiving device. The minimum received power of the device calculates the maximum transmit power and the minimum transmit power, respectively, and then selects the transmit power used for communication according to the maximum transmit power and the minimum transmit power. It avoids the situation that the transmission power is too large, causing interference to the access device or other users, and the transmission power is too small to transmit the signal correctly. BRIEF DESCRIPTION OF THE DRAWINGS In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments will be briefly described below. Obviously, the drawings in the following description are merely Some embodiments of the present invention may also be used to obtain other drawings based on these drawings without departing from the prior art.

1 is a flowchart of a method for controlling transmission power of a device according to Embodiment 1 of the present invention; FIG. 2 is a flowchart of a method for controlling transmission power of a device according to Embodiment 2 of the present invention; FIG. 3 is a transmission power of a device according to Embodiment 3 of the present invention; FIG. 4 is a flowchart of a method for controlling transmission power of a device according to Embodiment 4 of the present invention; FIG. 5 is a schematic structural diagram of an apparatus for controlling transmission power of a device according to Embodiment 5 of the present invention; Another structural schematic diagram of the device for transmitting power control of the device in Embodiment 5;

7 is a schematic structural diagram of another apparatus for controlling transmission power of a device according to Embodiment 5 of the present invention;

FIG. 8 is a schematic structural diagram of a system for controlling transmission power of a device according to Embodiment 6 of the present invention.

detailed description The technical solutions in the embodiments of the present invention are clearly and completely described in the following with reference to the accompanying drawings in the embodiments of the present invention. It is obvious that the described embodiments are a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments obtained by those skilled in the art based on the embodiments of the present invention without creative efforts are within the scope of the present invention.

The access device described in the embodiment of the present invention includes, but is not limited to, a base station or a wireless fidelity technology in a scenario such as cellular mobile communication, global microwave interconnection access (Wor ldwide Interoperabi ty for Microwave Acces s) (wi re les sf The access node (Aces s Point , AP ) in ide li ty, wif i ) is not limited by the actual application.

Embodiment 1

An embodiment of the present invention provides a method for controlling transmission power of a device. As shown in FIG. 1, the method includes the following steps:

101. The sending device obtains a maximum interference signal power that the access device can accept on the communication resource.

The communication resources are used for communication between D2D devices. The transmitting device obtains the maximum interference signal power in preparation for subsequent calculation of the maximum transmission power.

102. The transmitting device obtains a maximum transmit power on the communication resource.

The maximum transmit power is the sum of the path loss of the transmitting device to the access device and the maximum interference signal power that the access device can accept. The path loss of the transmitting device to the access device is a value of the transmit power loss on the path between the transmitting device and the access device.

103. The transmitting device obtains a minimum transmit power on the communication resource.

The minimum transmit power is the sum of the path loss of the transmitting device to the receiving device and the minimum received power of the receiving device. The path loss from the transmitting device to the receiving device is the value of the transmit power loss on the path between the transmitting device and the receiving device. The minimum received power of the receiving device is the minimum received power required for the receiving device to correctly receive the signal.

104. The transmitting device determines, according to the maximum transmit power and the minimum transmit power, a transmit power used when communicating with the receiving device. It should be noted that the foregoing sending device is the same as the receiving device, and is a user equipment (User Equipment, UE). In this embodiment, the UE that transmits the signal is used as the transmitting device, and the UE that receives the signal is used as the receiving device, which is only for convenience of description. In the actual D2D application, the UE performs interactive communication, and each UE is both sent. The device is again a receiving device.

The method for controlling the transmission power of the device provided by the embodiment of the present invention can be based on the path loss of the transmitting device to the access device and the maximum interference signal power that the access device can accept and the path loss of the transmitting device to the receiving device and the minimum receiving of the receiving device. The power calculates the maximum transmit power and the minimum transmit power, respectively, and then selects the transmit power used for communication based on the maximum transmit power and the minimum transmit power. It avoids the situation that the transmission power is too large to cause interference to the access device or other users, and the transmission power is too small to transmit the signal correctly.

The method of the embodiment of the present invention may be implemented by a processor (including a central processing unit (CPU)) or an application specific integrated circuit (ASIC), and the like.

Embodiment 2

201. The sending device acquires High Interference Indication (HI I) and Overload Indication (01) of the communication resource sent by the access device.

In this embodiment, the D2D device independently selects the communication resource, and the basis for selecting the communication resource is the interference sensitivity level information and the interference overload degree information sent by the access device. The access device sends the interference sensitive information and the interference overload information of the communication resources of all users in its jurisdiction to the sending device. For example, the interference sensitivity information and the interference overload degree information of all communication resources are sent to the transmitting device in the form of a bitmap, and the 0th bit in the bitmap list is assigned the interference sensitive information of the first communication resource, and the first bit is assigned. Interference sensitive information of two communication resources, and so on. Each bit has two states, 0 and 1, the 0 state represents the interference sensitive 1 state represents the interference insensitivity, or the 1 state represents the interference sensitive 0 state represents the interference insensitivity. Will all communication resources The interference sensitive information is sent to the transmitting device in the form of a bi tmap list. The interference overload information can be sent to the sending device in the same form, and is not described here.

202. The transmitting device determines a communication resource used when communicating with the receiving device.

After the transmitting device obtains the interference sensitivity information of the communication resource and the bitmap list of the interference overload degree information, the communication resource having the strongest anti-interference capability is selected according to the bitmap list to perform communication.

Specifically, the sending device selects one or more interference-insensitive communication resources according to the bitmap list of the interference sensitivity level information, and then selects one or more communication resources that are not overloaded according to the bitmap list of the interference overload degree information. The interference-insensitive communication resources and the interference-free communication resources are respectively regarded as a selected subset, and then the intersection of the two selected subsets is selected, that is, the communication resources in which the interference is insensitive and the interference is not overloaded are selected.

If the intersection has more than one communication resource, the sending device randomly selects one of the communication resources used as communication with the receiving device in the intersection; if the intersection is empty, the sending device performs step 201 to reacquire the communication. The interference sensitivity level information of the resource and the interference overload degree information are selected again until the intersection of the subsets is not empty.

It should be emphasized that the communication resources mentioned in this embodiment include communication resources that are in data communication with the access device, and also idle communication resources. Regardless of whether the communication resource is idle or not, its anti-interference ability is reflected in the interference sensitivity level information and the interference overload degree information. The transmitting device selects the multiplexed communication resource according to the interference sensitivity degree information of the communication resource and the interference overload degree information, and idles the communication resource. No distinction is made.

In addition, it should be emphasized that the information used to indicate the degree of interference of the communication resources in the actual application is not limited to the interference sensitivity level information or the interference overload degree information described in the embodiment of the present invention, and the information about the degree of interference of the communication resources may also be It is sent to the sending device in other forms. When the information is sent by other forms, the information about the degree of interference of the communication resource is not limited to the foregoing two types: interference sensitive, interference insensitive or interference overload, and interference non-overload, and several levels may be classified according to the degree of interference. And choice.

203. The sending device receives the maximum interference that the access device can accept on the selected communication resource. Signal power.

After the transmitting device selects the communication resource used for communication with the receiving device, it receives the maximum interference signal power that the access device can accept on the communication resource. The maximum interference signal power is the maximum interference signal power that the access device can accept on the communication resource calculated by the access device. The transmitting device receives the maximum interference signal power in preparation for subsequent calculation of the maximum transmission power.

It should be noted that the access device divides the communication resources into three levels of interference levels: high, medium, and low. The access device calculates the maximum interference signal power that can be accepted at the interference level according to the interference level of the communication resource, and then The maximum interference signal power is transmitted to the transmitting device.

204. The sending device receives a sequence of reference signals sent by the access device.

The purpose of the access device transmitting the reference signal sequence to the transmitting device is to enable the transmitting device to calculate the path loss of the transmitting device to the access device according to the reference signal sequence, and the content of the reference signal sequence itself has no meaning. The path loss of the transmitting device to the access device is a value of the transmit power loss on the path between the transmitting device and the access device.

205. The sending device calculates a path loss of the sending device to the access device.

After receiving the reference signal sequence sent by the access device, the sending device can calculate the reference signal sequence receiving power of the received reference signal sequence, and the reference signal sequence transmitting power of the access device transmitting the reference signal sequence is configured by the access device and sent to the access device. The transmitting device, so the path loss of the sending device to the access device is equal to the difference between the reference signal sequence transmitting power of the access device transmitting the reference signal sequence and the reference signal sequence receiving power of the transmitting device receiving the reference signal sequence.

206. The transmitting device calculates a maximum transmit power on the communication resource.

The maximum transmit power is the sum of the maximum interference signal power that the access device can accept and the path loss of the transmitting device to the access device.

207. The sending device receives a beacon frame sent by the receiving device.

The receiving device broadcasts a beacon frame to all D2D devices except itself, where the beacon frame carries the beacon frame transmission power of the beacon frame. The D2D device receives the beacon frame, and the transmitting device that communicates with the receiving device calculates the sending device according to the beacon frame transmitting power carried in the beacon frame and the beacon frame receiving power of receiving the beacon frame. Place The path loss of the receiving device, the path loss of the sending device to the receiving device is a transmission power loss value on a path between the sending device and the receiving device, that is, the transmitting power of the receiving device transmitting the beacon frame and the transmitting device receiving the signal The difference in received power of the frame. Other D2D devices discard the received beacon frames.

208. The sending device calculates a path loss of the sending device to the receiving device.

The purpose of the receiving device transmitting the beacon frame is to cause the transmitting device to calculate the path loss between the transmitting device and the receiving device according to the beacon frame. Specifically, after receiving the beacon frame, the sending device calculates the beacon frame receiving power of the received beacon frame, and then sends the beacon frame transmit power of the beacon frame by the receiving device carried in the beacon frame minus the beacon. The frame receiving power is the path loss of the receiving device to the transmitting device, and the path loss is approximated as the path loss of the transmitting device to the receiving device.

It should be noted that the beacon frame transmission power and the beacon frame reception power in this step are for the receiving device to transmit the beacon frame, and are independent of the power control power transmission in the present invention. The reference signal sequence transmission power and the reference signal sequence reception power in the same steps 204 and 205 are for the reference signal sequence, and are also independent of the power control power transmission in the present invention.

209. The transmitting device calculates a minimum transmit power on the communication resource.

The minimum transmit power is the sum of the path loss of the transmitting device to the receiving device and the minimum received power of the receiving device.

The minimum received power of the receiving device is the minimum received power required for the receiving device to correctly receive the signal.

210. The transmitting device selects a transmit power used when communicating with the receiving device according to the maximum transmit power and the minimum transmit power.

Specifically, the transmitting device compares the maximum transmit power calculated in steps 206 and 209 with the minimum transmit power:

When the maximum transmit power is greater than the minimum transmit power, one of the powers in the range of the maximum and minimum transmit power is selected as the transmit power used to communicate with the receiving device.

When the maximum transmit power is equal to the minimum transmit power, the maximum transmit power or minimum is The transmit power is the transmit power used to communicate with the receiving device.

When the maximum transmit power is less than the minimum transmit power, the power selection fails, and the steps are re-executed.

201 to step 210, selecting a new communication resource and calculating a maximum transmit power and a minimum transmit power on the reselected communication resource.

It should be noted that the maximum transmit power value is related to the maximum interference signal power value that the access device can accept, and the maximum interference signal power value that the access device can accept varies according to the quality of the communication resource; likewise, the minimum transmit power value It is related to the path loss value of the transmitting device to the receiving device, and the path loss value of the transmitting device to the receiving device differs depending on the quality of the communication resource. As a result, the maximum transmit power is less than the minimum transmit power. When this happens, the communication resources selected by the sending device cannot be utilized, the communication resources need to be reselected, and the maximum and minimum transmit power is calculated according to the new communication resources.

Preferably, when the transmitting device selects a transmit power and starts to communicate with the receiving device according to the transmit power, it continues to receive the beacon frame sent by the receiving device. The beacon frame carries a power adjustment parameter, and the sending device adjusts the size of the transmission power according to the power adjustment parameter.

Specifically, when the receiving power of the receiving signal of the receiving device is less than the minimum power that can correctly receive the signal, the receiving device carries the power adjusting parameter to the sending device in the transmitted beacon frame, and the transmitting device is required to increase the transmitting power. The transmitting device increases the transmitting power according to the power adjustment parameter to ensure that the receiving device can correctly receive the signal. Or, when the transmission power is too large, although the transmission power does not exceed the maximum transmission power, the receiving device may require the transmitting device to reduce the transmission power for the purpose of reducing the power consumption of the device and improving the battery life. The transmitting device adjusts the parameters according to the power, and reduces the transmitting power under the premise that the receiving power is not lower than the minimum receiving power that the receiving device can correctly receive the signal.

Further preferably, when the transmitting device selects one transmitting power and starts to communicate with the receiving device according to the transmitting power, the communication resource is still adjusted according to the condition of the communication resource.

Specifically, the sending device receives the interference sensitivity level information of the communication resource sent by the access device and the bitmap list of the interference overload degree information, if the anti-interference capability of the communication resource selected according to the new bitmap list is stronger than the currently used communication resource. Sending device selection The new communication resource is used as a communication resource used for communication with the receiving device, and the maximum transmit power and the minimum transmit power are recalculated according to the condition of the new communication resource and a new transmit power is determined.

It should be noted that the foregoing sending device is the same as the receiving device and is a UE. In this embodiment, the UE that transmits the signal is used as the transmitting device, and the UE that receives the signal is used as the receiving device, which is only for convenience of description. In the actual D2D application, the UE performs interactive communication, and each UE is both sent. The device is again a receiving device.

In addition, the method for transmitting power control of the device provided by the embodiment of the present invention can also adjust the size of the transmit power during the communication between the transmitting device and the receiving device to ensure that the signal is correctly transmitted with the minimum transmit power. Alternatively, in the process of communicating between the transmitting device and the receiving device, a communication resource with stronger anti-interference capability is selected to ensure that the transmitting device and the receiving device can communicate using the communication resource with the best communication condition.

The method of the embodiment of the present invention may be implemented by a processor (including a CPU) or an AS IC, and the embodiment of the present invention is not limited thereto.

Embodiment 3

An embodiment of the present invention provides a method for controlling transmission power of a device. As shown in FIG. 3, the method includes the following steps:

301. The sending device acquires interference sensitivity level information and interference overload degree information of the communication resource sent by the receiving device.

The interference sensitivity level information of the communication resource and the interference overload degree information are sent by the access device to the receiving device. Different from the second embodiment, in this embodiment, the sending device does not need to communicate with the access device, but the receiving device receives the interference sensitivity level information and the interference overload degree information of the communication resource sent by the access device, and The information is sent to the transmitting device to ensure that the transmitting device can obtain the necessary information for selecting the communication resource.

In this embodiment, the receiving device is used as a master device for transmitting access device information and participating in the D2D communication process. The transmitting device, as a slave device, acquires access device information from the receiving device, and does not directly receive information sent by the access device. The master-slave device is defined as an angle from which the access device information is obtained directly from the access device, and is not related to the definition of the transmitting and receiving device. In this embodiment, the master device is the receiving device, and the slave device is the Send the device.

In this embodiment, the D2D device independently selects the communication resource, and the basis for selecting the communication resource is the interference sensitivity level information and the interference overload degree information sent by the access device. The access device sends the interference sensitive information and the interference overload information of the communication resources of all users in its jurisdiction to the receiving device. For example, the interference sensitivity information and the interference overload degree information of all communication resources are sent to the receiving device in the form of bi tmap, and the 0th bit in the bitmap list is assigned the interference sensitive information of the first communication resource, the first bit Assign interference-sensitive information for the second communication resource, and so on. Each bi t bit has 0 and 1 states, 0 state represents interference sensitive 1 state represents interference insensitivity, or 1 state represents interference sensitive 0 state represents interference insensitivity. The interference sensitive information of all communication resources is sent to the receiving device in the form of a bitmap. The interference overload information can be sent to the receiving device in the same form, and is not described here.

302. The transmitting device determines a communication resource used when communicating with the receiving device.

Specifically, the sending device selects one or more interference-insensitive communication resources according to the bi tmap list of the interference sensitivity level information, and then selects one or more communication resources that are not overloaded according to the bi tmap list of the interference overload degree information. Separating the insensitive communication resources and the communication resources that are not overloaded as a selected subset, and then taking the intersection of the two selected subsets, that is, Select communication resources that are not sensitive to interference and that do not interfere with overload.

If the intersection has more than one communication resource, the sending device randomly selects one of the communication resources used as communication with the receiving device in the intersection; if the intersection is empty, the sending device performs step 301 to reacquire the communication. The interference sensitivity level information of the resource and the interference overload degree information are selected again until the intersection of the subsets is not empty.

In addition, it should be emphasized that the information used to indicate the degree of interference of the communication resources in the actual application is not limited to the interference sensitivity level information or the interference overload degree information described in the embodiment of the present invention, and the information about the degree of interference of the communication resources may also be The information about the degree of interference of the communication resource is not limited to the foregoing two types of interference sensitivity, interference insensitivity or interference overload, and interference non-overload, and may be based on the interference level. The division of several levels has been more carefully divided and selected.

303. The sending device receives the maximum interference signal power that the access device can accept on the selected communication resource.

After the transmitting device selects the communication resource used for communication with the receiving device, the receiving device receives the maximum interference signal power that the access device can accept on the communication resource. The maximum acceptable interference signal power is the maximum interference signal power that the access device calculates on the communication resource that the access device can accept. The transmitting device receives the maximum interference signal power in preparation for subsequent calculation of the maximum transmission power.

It should be noted that the access device divides the communication resources into three levels of interference levels: high, medium, and low. The access device calculates the maximum interference signal power at the interference level according to the interference level of the communication resource, and then The acceptable maximum interference signal power is transmitted to the receiving device and transmitted by the receiving device to the transmitting device. In this embodiment, the sending device does not need to communicate with the access device. Therefore, the same as step 301, the maximum interference signal power is also acquired by the receiving device from the access device, and then sent to the sending device.

304. The sending device receives a path loss of the receiving device to the access device sent by the receiving device. The receiving device receives the reference signal sequence sent by the access device, calculates the path loss of the receiving device to the access device, and sends the path loss of the receiving device to the access device to the sending device. The transmitting device approximates the path loss of the receiving device to the access device as the path loss of the transmitting device to the access device. The path loss of the receiving device to the access device is a value of the transmit power loss on the path between the receiving device and the access device.

The purpose of the access device transmitting the reference signal sequence to the receiving device is to enable the receiving device to calculate the path loss of the receiving device to the access device according to the reference signal sequence, and the content of the reference signal sequence itself has no meaning.

After receiving the reference signal sequence sent by the access device, the receiving device can calculate the reference signal sequence receiving power of the received reference signal sequence, and the reference signal sequence transmitting power of the access device transmitting the reference signal sequence is configured by the access device and sent to the access device. The receiving device, so the path loss of the receiving device to the access device is equal to the difference between the reference signal sequence transmitting power of the access device transmitting the reference signal sequence and the reference signal sequence receiving power of the receiving device receiving the reference signal sequence.

305. The sending device calculates a maximum transmit power on the communication resource.

After receiving the maximum interference signal power that the access device sends by the receiving device and the path loss of the receiving device to the access device, the transmitting device calculates the maximum transmit power that the transmitting device can transmit on the communication resource.

306. The sending device receives a beacon frame sent by the receiving device.

The receiving device broadcasts a beacon frame to all D2D devices except itself, where the beacon frame carries the beacon frame transmission power of the beacon frame. All D2D devices receive the beacon frame, and the transmitting device that communicates with the receiving device carries according to the beacon frame. Calculating the path loss of the transmitting device to the receiving device by the beacon frame transmission power and the beacon frame receiving power of the beacon frame, and the path loss of the transmitting device to the receiving device is on the path between the transmitting device and the receiving device The transmit power loss value, that is, the difference between the transmit power of the beacon frame transmitted by the receiving device and the received power of the beacon frame received by the transmitting device. Other D2D devices discard the received beacon frames.

307. The sending device calculates a path loss of the sending device to the receiving device.

It should be noted that the beacon frame transmission power and the beacon frame reception power in this step are for the receiving device to transmit the beacon frame, and are independent of the power control power transmission in the present invention. The reference signal sequence transmission power and the reference signal sequence reception power in the same step 304 are for the reference signal sequence, and are also independent of the power control power transmission in the present invention.

308. The transmitting device calculates a minimum transmit power on the communication resource.

309. The transmitting device selects a transmit power used when communicating with the receiving device according to the maximum transmit power and the minimum transmit power.

Specifically, the transmitting device compares the maximum transmit power calculated in step 305 with the minimum transmit power calculated in step 308:

From 301 to step 309, a new communication resource is selected and the maximum transmit power and the minimum transmit power on the reselected communication resource are calculated.

Further preferably, when the transmitting device selects one transmitting power and starts to communicate with the receiving device according to the transmitting power, the communication resource is still replaced according to the condition of the communication resource.

Specifically, the sending device receives the interference sensitivity level information of all communication resources sent by the receiving device and the bitmap list of the interference overload degree information, if the communication resource selected according to the new bitmap list has stronger anti-interference capability than the currently used communication resource. Sending device selection The new communication resource is selected as a communication resource used for communication with the receiving device, and the maximum transmit power and the minimum transmit power are recalculated according to the condition of the new communication resource and a new transmit power is determined.

It should be noted that the foregoing sending device is the same as the receiving device and is a UE. In this embodiment, the UE that transmits the signal is used as the transmitting device, and the UE that receives the signal is used as the receiving device, which is merely for convenience. In an actual D2D application, UEs perform interactive communication, and each UE is both a transmitting device and a receiving device.

In addition, there is another application scenario: The sending device receives the related information sent by the access device as the master device, and the receiving device does not receive the related information delivered by the access device because the receiving device cannot communicate with the access device. Since the receiving device does not need to receive the related information of the access device in the D2D communication, the transmitting device that is the master device does not send the related information delivered by the access device to the receiving device. The implementation scheme is the same as that in the second embodiment, and is not mentioned here.

Embodiment 4 An embodiment of the present invention provides a method for controlling transmission power of a device. As shown in FIG. 4, the method includes the following steps:

401. The sending device acquires interference sensitivity level information of the communication resource sent by the third device, and interference overload degree information.

The interference sensitivity level information of the communication resource and the interference overload degree information are sent by the access device to the third device.

Different from the third embodiment, in this embodiment, the sending device does not need to communicate with the access device, but the third device receives the interference sensitivity level information and the interference overload degree information of the communication resource sent by the access device, The information is sent to the sending device to ensure that the sending device can obtain the necessary information for selecting the communication resource. The third device is a third D2D device independent of the transmitting device and the receiving device. When the sending device and the receiving device are unable to communicate with the access device, the third device sends the interference sensitivity level information and the interference overload degree information of the communication resource sent by the access device to the sending device.

In this embodiment, the third device is used as a master device for transmitting access device information and does not participate in the D2D communication process. The sending device and the receiving device as the slave device acquire the access device information from the third device, and do not directly receive the information sent by the access device. The master-slave device is defined as an angle from which the access device information is obtained directly from the access device, and is not related to the definition of the transmitting and receiving device. In this embodiment, the master device is the third device, and the slave device is the device. The transmitting device and the receiving device are described.

In this embodiment, the D2D device independently selects the communication resource, and the basis for selecting the communication resource is the interference sensitivity level information and the interference overload degree information sent by the access device. The access device sends the interference sensitive information and the interference overload information of the communication resources of all the users in the jurisdiction to the third device in the form of a bi-tmap. For example, the interference sensitivity information and the interference overload degree information of all communication resources are sent to the third device in the form of bi tmap, and the 0th bit in the bi tma list is assigned the interference sensitive information of the first communication resource, the first The bit assigns interference sensitive information for the second communication resource, and so on. Each bi t bit has 0 and 1 states, 0 state represents interference sensitive 1 state represents interference insensitivity, or 1 state represents interference sensitive 0 state represents interference insensitivity. The interference sensitive information of all communication resources is sent to the third device in the form of a bi tmap list. The interference overload information can be sent to the third device in the same form, and details are not described herein again.

The steps 402 to 409 are the same as the steps 302 to 309 in the third embodiment, except that the maximum interference signal power that the access device can receive and the reference signal sequence sent by the receiving access device are obtained and sent to the sending device, and the reference signal sequence is calculated according to the reference signal sequence. The execution body of the three steps of sending the device to the access device is replaced with the third device, and details are not described herein again.

In this embodiment, the sending device does not need to communicate with the access device, so the same as step 401, the maximum interference signal power is also acquired by the third device (master device) from the access device and then sent to the sending device (slave device). .

Specifically, when the receiving power of the receiving signal of the receiving device is less than the minimum power that can correctly receive the signal, the receiving device carries the power adjusting parameter to the sending device in the transmitted beacon frame, and the transmitting device is required to increase the transmitting power. The transmitting device increases the transmission power according to the power adjustment parameter to ensure that the receiving device can correctly receive the signal. Or, when the transmission power is too large, although the transmission power does not exceed the maximum transmission power, the receiving device may require the transmitting device to reduce the transmission power for the purpose of reducing device power consumption and improving battery life. The transmitting device adjusts the parameter according to the power, and reduces the transmitting power under the premise that the receiving power is not lower than the minimum receiving power that the receiving device can correctly receive the signal. Further preferably, when the transmitting device selects one transmitting power and starts to communicate with the receiving device according to the transmitting power, the communication resource is still replaced according to the condition of the communication resource.

Specifically, the sending device receives the interference sensitivity level information of all communication resources sent by the third device and the bitmap list of the interference overload degree information, if the anti-interference capability of the communication resource selected according to the new bi tmap list is stronger than the currently used When communicating resources, the transmitting device selects the new communication resource as a communication resource used for communication with the receiving device, recalculates the maximum transmit power and the minimum transmit power according to the condition of the new communication resource, and determines a new transmit power.

The method of the embodiment of the present invention may be implemented by a processor (including a CPU) or an ASIC, and the embodiment of the present invention is not limited thereto.

Embodiment 5

Embodiments of the present invention provide a device for controlling transmission power of a device, as shown in FIG. 5 The device includes: an obtaining unit 51 and a first processing unit 52, wherein

The acquiring unit 51 is configured to acquire a maximum interference signal power that the access device can receive on the communication resource, where the communication resource is used by the sending device to communicate with the receiving device.

Receiving the maximum interference signal power that the access device can accept on the communication resource. The maximum interference signal power is the maximum interference signal power that the access device calculates on the communication resource that the access device can accept. Receiving the maximum interference signal power is in preparation for subsequent calculation of the maximum transmission power.

The first processing unit 52 is configured to obtain a maximum transmit power on the communication resource according to the path loss of the sending device to the access device and the maximum interference signal power.

The maximum transmit power is the sum of the path loss of the transmitting device to the access device and the maximum interference signal power.

The first processing unit 52 is further configured to obtain a minimum transmit power on the communication resource according to the path loss of the transmitting device to the receiving device and the minimum received power of the receiving device.

The first processing unit 52 is further configured to determine a transmit power used when communicating with the receiving device according to the maximum transmit power and the minimum transmit power.

Further, as shown in FIG. 6, the device further includes:

The second processing unit 61 is configured to determine, when the acquiring unit 51 acquires the maximum interference signal power that the access device can receive on the communication resource, the communication resource used when communicating with the receiving device.

Further, as shown in FIG. 7, the second processing unit 61 may include:

The receiving subunit 71 is configured to receive interference sensitivity level information of the communication resource and interference overload degree information.

The processing subunit 72 is configured to perform interference sensitivity information according to communication resources and interference overload The degree information selects the communication resource used.

Further, the receiving subunit 71 is specifically configured to receive interference sensitivity level information and interference overload degree information of the communication resource sent by the access device.

Alternatively, the interference sensitivity level information of the communication resource sent by the receiving device and the interference overload level information are received, and the interference sensitivity level information and the interference overload degree information of the communication resource are sent by the access device to the receiving device.

Or receiving interference sensitivity level information and interference overload level information of the communication resource sent by the third device, where the interference sensitivity degree information of the communication resource and the interference overload degree information are sent by the access device to the third device.

Further, the processing sub-unit 72 is specifically configured to select, according to the interference sensitivity level information of the communication resource and the interference overload degree information, a communication resource whose interference is not sensitive and the interference is not overloaded. Further, the acquiring unit 51 is specifically configured to receive the maximum interference signal power that the access device sends by the access device. Or receiving the maximum interference signal power sent by the receiving device, where the maximum interference signal power is sent by the access device to the receiving device. Or receiving the maximum interference signal power sent by the third device, where the maximum interference signal power is sent by the access device to the third device.

Further, the acquiring unit 51 is further configured to receive a sequence of reference signals sent by the access device. The purpose of the access device sending the reference signal sequence is to enable the first processing unit 52 to calculate a path loss of the sending device to the access device according to the reference signal sequence, where the path loss of the sending device to the access device is Transmit power loss value on the path between access devices. The content of the reference signal sequence itself is meaningless.

The first processing unit 52 is further configured to calculate a path loss of the sending device to the access device according to a difference between a reference signal sequence transmission power of the reference signal sequence and a reference signal sequence received power of the received reference signal sequence. .

Further, the obtaining unit 51 is further configured to receive a path loss of the receiving device to the access device sent by the receiving device.

Receiving, by the receiving device, the reference signal sequence sent by the access device and comparing the reference signal sequence transmit power of the reference signal sequence with the received signal power of the reference signal sequence receiving the reference signal sequence As the path loss of the receiving device to the access device.

Or receiving a path loss of the third device sent by the third device to the access device.

The third device receives the reference signal sequence sent by the access device and uses the difference between the reference signal sequence transmission power of the reference signal sequence and the reference signal sequence received power of the reference signal sequence as the path loss of the third device to the access device.

Further, the acquiring unit 51 is further configured to receive a beacon frame sent by the receiving device, where the beacon frame carries a beacon frame transmission power that the receiving device sends the beacon frame.

The first processing unit 52 is further configured to calculate a path loss of the sending device to the receiving device according to a difference between the beacon frame transmission power and the beacon frame receiving power of the received beacon frame.

Further, the first processing unit 52 is specifically configured to: when the maximum transmit power is greater than the minimum transmit power, arbitrarily select a transmit power used when communicating with the receiving device between the minimum transmit power and the maximum transmit power. Alternatively, when the maximum transmit power is equal to the minimum transmit power, the maximum transmit power or the minimum transmit power is used as the transmit power used in communication with the receiving device. Alternatively, when the maximum transmit power is less than the minimum transmit power, the communication resources are reselected.

Further, the second processing unit 61 is further configured to adjust a communication resource used when communicating with the receiving device according to the received interference sensitivity level information and the interference overload degree information during the communication.

The acquiring unit 51 is further configured to receive a beacon frame sent by the receiving device, where the beacon frame carries a power adjustment parameter.

The first processing unit 52 is further configured to adjust transmit power according to a power adjustment parameter, where the transmit power is between a minimum transmit power and a maximum transmit power.

The device for transmitting power control of the device provided by the embodiment of the present invention can according to the path loss of the sending device to the access device and the maximum interference signal power that the access device can accept and the path loss of the transmitting device to the receiving device and the minimum receiving of the receiving device. The power calculates the maximum transmit power and the minimum transmit power, respectively, and then selects the transmit power used for communication based on the maximum transmit power and the minimum transmit power. It avoids the situation that the transmission power is too large to cause interference to the access device or other users, and the transmission power is too small to correctly transmit the signal. In addition, the apparatus for transmitting power control of the device provided by the embodiment of the present invention can also adjust the size of the transmit power during the communication between the sending device and the receiving device to ensure that the signal is correctly transmitted with the minimum transmit power. Alternatively, in a process in which the transmitting device communicates with the receiving device, a communication resource having stronger anti-interference capability is selected to ensure that the transmitting device and the receiving device can communicate using the communication resource with the best communication condition.

The device in the embodiment of the present invention may be implemented by a processor (including a CPU) or an ASIC, and the embodiment of the present invention is not limited thereto.

Embodiment 6

The embodiment of the present invention provides a system for transmitting power control of a device. As shown in FIG. 8, the system includes: a sending device 81, configured to acquire a maximum interference signal power that the access device 83 can accept on a communication resource. The communication resource is used by the transmitting device 81 to communicate with the receiving device 82, and obtains the maximum transmitting power on the communication resource according to the path loss of the transmitting device 81 to the access device 83 and the maximum interference signal power, according to the path from the transmitting device 81 to the receiving device 82. The minimum received power of the loss and receiving device 82 obtains the minimum transmit power on the communication resource, and the minimum received power of the receiving device 82 is the minimum received power required by the receiving device 82 to correctly receive the signal, according to the maximum transmit power and the minimum transmit power, The transmit power used in communication with the receiving device 82 is determined.

Further, the sending device 81 is further configured to determine a communication resource used when communicating with the receiving device 82, receive interference sensitivity level information of the communication resource, and interference overload degree information, according to interference sensitivity degree information of the communication resource and interference The overload level information selects the communication resource used, and receives the reference signal sequence sent by the access device 83, and calculates the difference between the reference signal sequence transmission power of the reference signal sequence and the received signal sequence of the received reference signal sequence according to the access device 83. Obtaining the path loss of the sending device 81 to the access device 83, receiving the path loss of the receiving device 82 to the access device 83 sent by the receiving device 82, and receiving the beacon frame sent by the receiving device 82, where the beacon frame carries The receiving device 82 transmits the beacon frame transmission power of the beacon frame, and calculates the path loss of the transmitting device 81 to the receiving device 82 according to the difference between the beacon frame transmission power and the beacon frame reception power of the received beacon frame. Further, the sending device 81 is further configured to adjust, according to the received interference sensitivity level information and the interference overload degree information, the communication resource used when communicating with the receiving device 82, and receive the beacon sent by the receiving device 82. a frame, the beacon frame carries a power adjustment parameter, and the transmit power is adjusted according to a power adjustment parameter, where the transmit power is between a minimum transmit power and a maximum transmit power.

The receiving device 82 is configured to communicate with the transmitting device 81 according to the transmit power determined by the transmitting device 81.

The access device 83 is configured to send, to the transmitting device 81, the maximum interference signal power that the access device 83 can accept on the communication resource. The system for transmitting power control of the device provided by the embodiment of the present invention can according to the path loss of the sending device to the access device and the maximum interference signal power that the access device can accept and the path loss of the transmitting device to the receiving device and the minimum receiving of the receiving device. The power calculates the maximum transmit power and the minimum transmit power, respectively, and then selects the transmit power used for communication based on the maximum transmit power and the minimum transmit power. It avoids the situation that the transmission power is too large to cause interference to the access device or other users, and the transmission power is too small to transmit the signal correctly.

In addition, the system for transmitting power control of the device provided by the embodiment of the present invention can also adjust the size of the transmit power during the communication between the transmitting device and the receiving device to ensure that the signal is correctly transmitted with the minimum transmit power. Alternatively, in the process of communicating between the transmitting device and the receiving device, a communication resource with stronger anti-interference capability is selected to ensure that the transmitting device and the receiving device can communicate using the communication resource with the best communication condition.

Through the description of the above embodiments, those skilled in the art can clearly understand that the present invention can be implemented by means of software plus necessary general hardware, and of course, by hardware, but in many cases, the former is a better implementation. . Based on such understanding, the technical solution of the present invention, which is essential or contributes to the prior art, may be embodied in the form of a software product stored in a readable storage medium, such as a floppy disk of a computer. A hard disk or optical disk or the like includes instructions for causing a computer device (which may be a personal computer, a server, or a network device, etc.) to perform the methods described in various embodiments of the present invention. The above is only the specific embodiment of the present invention, but the scope of the present invention is not limited thereto, and any person skilled in the art can easily think of changes or substitutions within the technical scope of the present invention. It should be covered by the scope of the present invention. Therefore, the scope of the invention should be determined by the scope of the claims.

Claims

Rights request

A method for controlling transmission power of a device, comprising:

Obtaining a maximum interference signal power that the access device can receive on the communication resource, where the communication resource is used by the sending device to communicate with the receiving device;

Obtaining a maximum transmit power on the communication resource according to a path loss to the access device and the maximum interference signal power;

The method for controlling the transmit power of the device according to claim 1, wherein before the obtaining the maximum interference signal power that the access device can receive on the communication resource, the method further includes:

A communication resource used in communication with the receiving device is determined.

The method for controlling the transmission power of the device according to claim 2, wherein the communication resource used when determining the communication with the receiving device comprises:

Receiving interference sensitivity level information and interference overload degree information of the communication resource; determining communication resources used when communicating with the receiving device according to the interference sensitivity level information of the communication resource and the interference overload degree information.

The method for controlling the transmission power of the device according to claim 3, wherein the interference sensitivity level information of the interference sensitivity level information and the interference overload degree information of the interference overload level information are received by the communication resource, including:

Receiving interference sensitivity level information and interference overload degree information of the communication resource sent by the access device; or

Receiving interference sensitivity level information and interference overload degree information of the communication resource sent by the receiving device, interference sensitivity degree information of the communication resource, and interference overload degree information Transmitted by the access device to the receiving device; or

Receiving interference sensitivity level information and interference overload degree information of the communication resource sent by the third device, where the interference sensitivity degree information of the communication resource and the interference overload degree information are sent by the access device to the third device.

The method for controlling transmission power of a device according to claim 3 or 4, wherein the determining, according to the interference sensitivity level information of the communication resource and the interference overload degree information, determining the communication used when communicating with the receiving device Communication resources, including:

A communication resource that is insensitive to interference and interferes with no overload is selected as a communication resource used when communicating with the receiving device.

The method for controlling the transmit power of a device according to any one of claims 1 to 4, wherein the obtaining the maximum interference signal power that the access device can receive on the communication resource comprises:

Receiving the maximum interference signal power sent by the access device; or

Receiving, by the receiving device, the maximum interference signal power, where the maximum interference signal power is sent by the access device to the receiving device; or

Receiving, by the third device, the maximum interference signal power sent by the third device, where the maximum interference signal power is sent by the access device to the third device.

The method for controlling transmission power of a device according to any one of claims 1 to 4, wherein the communication is obtained according to the path loss to the access device and the maximum interference signal power. Before the maximum transmit power on the resource, it also includes:

Receiving a reference signal sequence sent by the access device;

Calculating the path loss to the access device according to a difference between a transmit power of the reference signal sequence and a received power of the reference signal sequence.

Receiving, by the receiving device, a path loss of the receiving device to the access device, where The path loss of the receiving device to the access device is calculated according to the difference between the transmit power of the reference signal sequence sent by the access device and the received power of the reference signal sequence sent by the access device received by the receiving device; or,

Receiving, by the third device, a path loss of the third device to the access device, where the path loss of the third device to the access device is transmitted according to a reference signal sequence sent by the access device The difference between the power and the received power of the reference signal sequence transmitted by the access device received by the third device is calculated.

The method for controlling transmission power of a device according to any one of claims 1 to 4, characterized in that, in the path loss according to the receiving device and the minimum received power of the receiving device, Before describing the minimum transmit power on the communication resources, it also includes:

Receiving a beacon frame sent by the receiving device, where the beacon frame carries a beacon frame transmission power of the beacon frame sent by the receiving device;

The path loss to the receiving device is calculated based on the beacon frame transmission power and the beacon frame reception power of the received beacon frame.

The method for controlling transmission power of a device according to any one of claims 1 to 4, wherein, according to the maximum transmission power and the minimum transmission power, determining a communication used when communicating with a receiving device Transmit power, including:

When the maximum transmit power is greater than the minimum transmit power, any value between the minimum transmit power and the maximum transmit power is used as the transmit power used in communication with the receiving device;

When the maximum transmit power is equal to the minimum transmit power, the maximum transmit power or the minimum transmit power is used as a transmit power used when communicating with the receiving device; when the maximum transmit power is less than the minimum When transmitting power, select a new communication resource.

The method for controlling transmission power of a device according to any one of claims 1 to 4, wherein the determining, when the communication resource is used for communication with the receiving device, the method further comprises: The communication resource used when communicating with the receiving device is adjusted according to the interference sensitivity level information of the received communication resource and the interference overload level information.

Receiving, in a communication process, a beacon frame sent by the receiving device, where the beacon frame carries a power adjustment parameter;

Adjusting the transmit power according to the power adjustment parameter, the transmit power being between the minimum transmit power and the maximum transmit power.

1 3, a device for transmitting power of a device, characterized in that:

The device for controlling the transmission power of the device according to claim 13, further comprising:

And a second processing unit, configured to determine a communication resource used when communicating with the receiving device before acquiring the maximum interference signal power that the access device can receive on the communication resource.

The device for controlling the transmission power of the device according to claim 14, wherein the second processing unit comprises:

a receiving subunit, configured to receive interference sensitivity level information of the communication resource and interference overload level information;

And a processing subunit, configured to determine, according to the interference sensitivity level information of the communication resource and the interference overload degree information, a communication resource used when communicating with the receiving device.

The apparatus for controlling transmission power of a device according to claim 15, wherein the receiving subunit is specifically configured to receive interference sensitivity level information and interference overload degree information of the communication resource sent by the access device. Or,

Receiving interference sensitivity level information and interference overload degree information of the communication resource sent by the receiving device, the interference sensitivity level information of the communication resource and the interference overload degree information are sent by the access device to the receiving device; or ,

The device for transmitting power of the device according to claim 15 or 16, wherein the processing sub-unit is specifically configured to select a communication resource that is insensitive to interference and interferes with no overload as a communication with the receiving device. Communication resources used.

The device for controlling the transmission power of the device according to any one of claims 1 to 3, wherein the acquiring unit is specifically configured to receive the maximum interference signal power sent by the access device; or ,

The device for transmitting power of the device according to any one of claims 1 to 3, wherein the acquiring unit is further configured to receive a reference signal sequence sent by the access device;

The first processing unit is further configured to calculate the path loss to the access device according to a difference between a transmit power of the reference signal sequence and a received power of the reference signal sequence.

The device for transmitting power of the device according to any one of claims 1 to 3, wherein the acquiring unit is further configured to receive the receiving device that is sent by the receiving device to the access Path loss of the device, the path loss of the receiving device to the access device according to the Calculating a difference between a transmit power of a reference signal sequence sent by the access device and a received power of the reference signal sequence sent by the access device by the receiving device; or

The device for transmitting power of the device according to any one of claims 1 to 3, wherein the acquiring unit is further configured to receive a beacon frame sent by the receiving device, where the beacon frame is Carrying a beacon frame transmission power of the beacon frame by the receiving device;

The first processing unit is further configured to calculate the path loss to the receiving device according to the beacon frame transmission power and the beacon frame receiving power of the received beacon frame.

The device for transmitting power of the device according to any one of claims 1 to 3, wherein the first processing unit is specifically configured to: when the maximum transmit power is greater than the minimum transmit power, Any value between the minimum transmit power and the maximum transmit power is used as the transmit power used in communication with the receiving device;

When the maximum transmit power is equal to the minimum transmit power, the maximum transmit power or the minimum transmit power is used as a transmit power used when communicating with the receiving device; when the maximum transmit power is less than the minimum When transmitting power, reselect communication resources.

The device for controlling the transmission power of the device according to any one of claims 14 to 16, wherein the second processing unit is further configured to: according to the interference sensitivity of the received communication resource during the communication process The information and the interference overload level information adjust communication resources used in communication with the receiving device.

The device for transmitting power of the device according to any one of claims 1 to 3, wherein the acquiring unit is further configured to receive a beacon frame sent by the receiving device, in a communication process, Carrying a power adjustment parameter in the beacon frame;

The first processing unit is further configured to adjust the transmit power according to the power adjustment parameter, where the transmit power is between the minimum transmit power and the maximum transmit power.

A control system for transmitting power of a device, comprising: a transmitting device, configured to acquire a maximum interference signal power that the access device can receive on a communication resource, where the communication resource is used for the sending device to communicate with the receiving device Obtaining a maximum transmit power on the communication resource according to a path loss to the access device and the maximum interference signal power, and obtaining a path loss according to the path loss to the receiving device and a minimum received power of the receiving device. The minimum transmit power on the communication resource, the minimum received power of the receiving device is the minimum received power required by the receiving device to correctly receive the signal, and the determining and receiving device according to the maximum transmit power and the minimum transmit power Transmit power used in communication; line communication;

And an access device, configured to send, to the sending device, a maximum interference signal power that the access device can accept on a communication resource.