CN105379367B - Transmission power control method and device - Google Patents

Transmission power control method and device Download PDF

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Publication number
CN105379367B
CN105379367B CN201480001640.2A CN201480001640A CN105379367B CN 105379367 B CN105379367 B CN 105379367B CN 201480001640 A CN201480001640 A CN 201480001640A CN 105379367 B CN105379367 B CN 105379367B
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user equipment
power
transmission power
base station
network coverage
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CN105379367A (en
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黎超
张兴炜
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Huawei Technologies Co Ltd
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Huawei Technologies Co Ltd
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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
    • H04W52/28—TPC being performed according to specific parameters using user profile, e.g. mobile speed, priority or network state, e.g. standby, idle or non transmission
    • H04W52/281—TPC being performed according to specific parameters using user profile, e.g. mobile speed, priority or network state, e.g. standby, idle or non transmission taking into account user or data type priority
    • 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
    • H04W52/38—TPC being performed in particular situations
    • H04W52/383—TPC being performed in particular situations power control in peer-to-peer links

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  • Engineering & Computer Science (AREA)
  • Computer Networks & Wireless Communication (AREA)
  • Signal Processing (AREA)
  • Mobile Radio Communication Systems (AREA)

Abstract

A transmission power control method and device, the method includes: the method comprises the steps that the first user equipment determines the transmitting power when the first user equipment transmits data to the second user equipment; and the first user equipment transmits data to the second user equipment by using the transmission power. It is achieved that in the D2D communication mode, the transmission power of the first user equipment is controlled.

Description

Transmission power control method and device
Technical Field
The present invention relates to communications technologies, and in particular, to a method and an apparatus for controlling transmit power.
Background
With the continuous development of communication technology, data transmission in a short distance is required among more and more user devices, for example, data sharing, mutual picture transmission, business cards and the like are typical short-distance communication.
Device to Device (D2D) is a communication technology for exchanging data directly between devices under control of a mobile network. In a specific implementation process, the first user equipment performs direct data transmission with the second user equipment by using frequency band resources of the cellular communication network. In the existing D2D communication process, in order to ensure that the transmitted data can be received by the second user equipment within 1.7 km, the first user equipment needs to transmit data to the second user equipment with the maximum transmission power.
However, since the transmission power of the first user equipment in the D2D communication mode cannot be controlled in the prior art, unnecessary interference is generated when the first user equipment transmits data to the second user equipment with the maximum transmission power.
Disclosure of Invention
The embodiment of the invention provides a transmission power control method and equipment, which are used for controlling the transmission power of user equipment in a D2D communication mode.
In a first aspect, an embodiment of the present invention provides a user equipment, where the user equipment is a first user equipment, and the user equipment includes:
the device comprises a determining module, a transmitting module and a receiving module, wherein the determining module is used for determining the transmitting power when the first user equipment transmits data to the second user equipment;
and the data sending module is used for sending data to the second user equipment by using the transmitting power.
With reference to the first aspect, in a first possible implementation manner of the first aspect, the determining module is specifically configured to: determining the transmitting power when the first user equipment transmits data to the second user equipment according to the communication service type;
the communication service types comprise public safety emergency services and non-public safety common services, the transmitting power corresponding to the public safety emergency services is a first transmitting power grade, the transmitting power corresponding to the non-public safety common services is a second transmitting power grade, and the first transmitting power grade is higher than the second transmitting power grade.
With reference to the first possible implementation manner of the first aspect, in a second possible implementation manner of the first aspect, the non-public safety general service includes general services with different service quality levels, the second transmission power level includes a plurality of second transmission power sub-levels, and the second transmission power sub-level corresponding to the general service corresponds to the service quality of the general service.
With reference to the first aspect, in a third possible implementation manner of the first aspect, the determining module is specifically configured to: determining the transmitting power when the first user equipment transmits data to the second user equipment according to the communication service mode;
wherein the communication traffic mode comprises normal mode communication, fallback mode communication and interference mode communication.
With reference to the third possible implementation manner of the first aspect, in a fourth possible implementation manner of the first aspect, the method further includes, before the determining module determines, according to the communication service mode, the transmission power when the first user equipment sends data to the second user equipment,
determining an available channel for transmitting data to the second user equipment;
and judging whether the available channel is occupied, if not, determining that the communication service mode is the normal communication mode, if so, judging whether the channel running on the occupied channel is a public safety emergency service, if so, determining that the communication service mode is the yielding mode communication, and if not, determining that the communication service mode is the interference mode communication.
With reference to the fourth possible implementation manner of the first aspect, in a fifth possible implementation manner of the first aspect, the determining module is specifically configured to:
under the normal mode communication, determining the transmitting power when transmitting data to the second user equipment according to the communication service type, and transmitting the data to the second user equipment on an unoccupied available channel; or
Determining that the transmission power when transmitting data to the second user equipment is lower than the transmission power when the first user equipment transmits data to the second user equipment when performing public safety emergency service in the fallback mode communication; or
And under the interference mode communication, determining the transmission power when transmitting data to the second user equipment according to the interference condition of the available channel.
With reference to the first aspect and any one of the first to fifth possible implementation manners of the first aspect, in a sixth possible implementation manner of the first aspect, the method further includes: a request sending module and a receiving module;
the request sending module is configured to send a power request message to a base station when the first user equipment is located in a coverage area of a mobile communication network, where the power request message includes channel usage information acquired by the first user equipment, so that the base station determines a transmission power of the first user equipment according to the channel usage information;
the receiving module is configured to receive a power response message sent by the base station, where the power response message includes a transmission power of the first user equipment;
the determining module is further configured to determine, if the transmission power determined by the determining module is different from the transmission power determined by the base station, that the transmission power determined by the base station is the transmission power when data is sent to the second user equipment.
With reference to the first aspect and any one of the first to sixth possible implementation manners of the first aspect, in a seventh possible implementation manner of the first aspect, the method further includes: an information sending module, configured to send, to the second user equipment, the transmission power used by the first user equipment and/or the network coverage information of the first user equipment, so that the second user equipment determines the transmission power.
In a second aspect, an embodiment of the present invention provides a user equipment, where the user equipment is a second user equipment, and the user equipment includes:
the receiving module is used for receiving the network coverage information of the first user equipment, which is sent by the first user equipment;
and the determining module is used for determining the transmitting power when the second user equipment sends data to the first user equipment according to the network coverage information of the first user equipment and the network coverage information of the second user equipment.
With reference to the second aspect, in a first possible implementation manner of the second aspect, the determining module includes:
a state determining unit, configured to determine mobile network coverage states of the first user equipment and the second user equipment according to network coverage information of the first user equipment and network coverage information of the second user equipment;
a power determining unit, configured to determine, according to mobile network coverage states of the first user equipment and the second user equipment, a transmission power when the second user equipment sends data to the first user equipment;
wherein the mobile network coverage status of the first user equipment and the second user equipment comprises any one of the following forms:
the first user equipment and the second user equipment are located in a mobile network coverage area;
neither the first user equipment nor the second user equipment is located in a mobile network coverage area;
the first user equipment is located in a mobile network coverage area, and the second user equipment is not located in the mobile network coverage area;
the first user equipment is not located in a mobile network coverage area, and the second user equipment is located in the mobile network coverage area.
With reference to the first possible implementation manner of the second aspect, in a second possible implementation manner of the second aspect, when the state determining unit determines that the first user equipment and the second user equipment are located in a mobile network coverage area and the first user equipment and the second user equipment are served by a first base station, the power determining unit is specifically configured to:
transmitting power adjustment information to the first base station, wherein the power adjustment information is used for instructing the first base station to adjust the transmission power and/or time-frequency resources of the first user equipment and the transmission power and/or time-frequency resources of the second user equipment;
and receiving power adjustment response information sent by the first base station, and determining the transmitting power when the second user equipment sends data to the first user equipment according to the power adjustment response information.
With reference to the first possible implementation manner of the second aspect, in a third possible implementation manner of the second aspect, when the state determining unit determines that the first user equipment and the second user equipment are located in a mobile network coverage area, the second user equipment is served by a second base station, and the first user equipment is served by a third base station, the power determining unit is specifically configured to:
transmitting power adjustment information to the second base station, wherein the power adjustment information is used for instructing the second base station to adjust the transmission power and/or the time-frequency resource of the first user equipment, and instructing the second base station to communicate with the third base station, so that the third base station adjusts the transmission power and/or the time-frequency resource of the first user equipment;
and receiving power adjustment response information sent by the second base station, and determining the transmitting power when the second user equipment sends data to the first user equipment according to the power adjustment response information.
With reference to the first possible implementation manner of the second aspect, in a fourth possible implementation manner of the second aspect, when the state determining unit determines that neither the first user equipment nor the second user equipment is located in a mobile network coverage area, the power determining unit is specifically configured to:
and determining the transmitting power when the data is transmitted to the first user equipment according to the communication service type or the communication service mode.
With reference to the first possible implementation manner of the second aspect, in a fifth possible implementation manner of the second aspect, when the state determining unit determines that the first user equipment is not located in a mobile network coverage area, and the second user equipment is located in a mobile network coverage area, the power determining unit is specifically configured to:
acquiring the transmitting power used by the first user equipment;
determining the path loss when the first user equipment sends data to the second user equipment according to the transmitting power used by the first user equipment and the measured transmitting power of the first user equipment measured and obtained by the second user equipment;
determining the limited transmitting power of the second user equipment according to the path loss and the receiving sensitivity of the first user equipment;
and determining the transmitting power when the second user equipment transmits data to the first user equipment according to the limited transmitting power.
With reference to the fifth possible implementation manner of the second aspect, in a sixth possible implementation manner of the second aspect, the power determining unit is further specifically configured to:
transmitting the limited transmit power to a second base station, the second base station serving the second user equipment;
and receiving the transmission power sent by the second base station when the second user equipment sends data to the first user equipment.
With reference to the fifth possible implementation manner of the second aspect, in a seventh possible implementation manner of the second aspect, the power determining unit is further specifically configured to:
sending the limited transmitting power and the limited time-frequency resource of the second user equipment to a second base station, wherein the second base station serves the second user equipment;
and receiving the transmitting power sent by the second base station when the second user equipment sends data to the first user equipment and the time-frequency resource configured for the second user equipment by the second base station.
With reference to the fifth possible implementation manner of the second aspect, in an eighth possible implementation manner of the second aspect, the power determining unit is further specifically configured to:
determining the transmitting power which can be used by the current channel according to the current communication service;
and determining the transmitting power when the second user equipment transmits data to the first user equipment according to the transmitting power which can be used by the current channel and the limited transmitting power.
With reference to any one of the fifth to the eighth possible implementation manners of the second aspect, in a ninth possible implementation manner of the second aspect, when the state determining unit determines that the first user equipment is not located in a mobile network coverage area and the second user equipment is located in a mobile network coverage area, the power determining unit is further configured to:
acquiring available transmitting power on a channel corresponding to the second base station communication, transmitting power allowed by the second user equipment and the limited transmitting power, wherein the second base station serves the second user equipment;
and determining the transmission power when the second user equipment sends data to the second base station according to the transmission power which can be used on the channel corresponding to the communication of the second base station, the transmission power allowed by the second user equipment and the limited transmission power.
With reference to the first possible implementation manner of the second aspect, in a tenth possible implementation manner of the second aspect, when the state determination module determines that the first user equipment is located in a coverage area of a mobile network and the second user equipment is not located in the coverage area of the mobile network, the power determination unit is specifically configured to:
transmitting power adjustment information or transmission resource adjustment information to the first user equipment;
and determining the transmitting power when the second user equipment transmits data to the first user equipment according to the adjusted transmitting power or the adjusted transmitting resource of the first user equipment.
In a third aspect, an embodiment of the present invention provides a transmission power control method, including:
the method comprises the steps that the first user equipment determines the transmitting power when the first user equipment transmits data to the second user equipment;
and the first user equipment transmits data to the second user equipment by using the transmission power.
With reference to the third aspect, in a first possible implementation manner of the third aspect, the determining, by the first user equipment, transmission power when the first user equipment sends data to the second user equipment includes:
the first user equipment determines the transmitting power when the first user equipment transmits data to the second user equipment according to the communication service type;
the communication service types comprise public safety emergency services and non-public safety common services, the transmitting power corresponding to the public safety emergency services is a first transmitting power grade, the transmitting power corresponding to the non-public safety common services is a second transmitting power grade, and the first transmitting power grade is higher than the second transmitting power grade.
With reference to the first possible implementation manner of the third aspect, in a second possible implementation manner of the third aspect, the non-public safety general service includes general services with different service quality levels, the second transmission power level includes a plurality of second transmission power sub-levels, and the second transmission power sub-level corresponding to the general service corresponds to the service quality of the general service.
With reference to the third aspect, in a third possible implementation manner of the third aspect, the determining, by the first user equipment, transmission power when the first user equipment sends data to the second user equipment includes:
the first user equipment determines the transmitting power when the first user equipment transmits data to the second user equipment according to the communication service mode;
wherein the communication traffic mode comprises normal mode communication, fallback mode communication and interference mode communication.
With reference to the third possible implementation manner of the third aspect, in a fourth possible implementation manner of the third aspect, before the determining, by the first user equipment, the transmission power when the first user equipment transmits data to the second user equipment according to the communication service mode, the method further includes:
the first user equipment determines an available channel for transmitting data to second user equipment;
the first user equipment judges whether the available channel is occupied, if not, the first user equipment determines that the communication service mode is the normal communication mode, if so, the first user equipment judges whether the channel which is occupied runs public safety emergency service, if so, the first user equipment determines that the communication service mode is the deferral mode communication, and if not, the first user equipment determines that the communication service mode is the interference mode communication.
With reference to the fourth possible implementation manner of the third aspect, in a fifth possible implementation manner of the third aspect, the determining, by the first user equipment, transmission power when the first user equipment sends data to the second user equipment according to the communication service mode includes:
under the normal mode communication, the first user equipment determines the transmitting power when transmitting data to the second user equipment according to the communication service type, and transmits the data to the second user equipment on an unoccupied available channel; or
In the fallback mode communication, the first user equipment determines that the transmission power when transmitting data to the second user equipment is lower than the transmission power when the first user equipment transmits data to the second user equipment when performing public safety emergency service; or
And under the interference mode communication, the first user equipment determines the transmission power when transmitting data to the second user equipment according to the interference condition of the available channel.
With reference to the third aspect and any one of the first to fifth possible implementation manners of the third aspect, in a sixth possible implementation manner of the third aspect, when the first user equipment is located in a coverage area of a mobile communication network, the first user equipment sends a power request message to a base station, where the power request message includes channel usage information acquired by the first user equipment, so that the base station determines the transmission power of the first user equipment according to the channel usage information;
the first user equipment receives a power response message sent by the base station, wherein the power response message comprises the transmission power of the first user equipment;
if the first user equipment determines that the transmission power determined by the first user equipment is different from the transmission power determined by the base station, the first user equipment determines that the transmission power determined by the base station is the transmission power when data is sent to the second user equipment.
With reference to the third aspect and any one of the first to sixth possible implementation manners of the third aspect, in a seventh possible implementation manner of the third aspect, the method further includes:
the first user equipment sends the transmission power used by the first user equipment and/or the network coverage information of the first user equipment to the second user equipment so as to enable the second user equipment to determine the transmission power.
In a fourth aspect, an embodiment of the present invention provides a transmission power control method, including:
the method comprises the steps that a second user device receives network coverage information of a first user device, wherein the network coverage information is sent by the first user device;
and the second user equipment determines the transmission power when the second user equipment sends data to the first user equipment according to the network coverage information of the first user equipment and the network coverage information of the second user equipment.
With reference to the fourth aspect, in a first possible implementation manner of the fourth aspect, the determining, by the second user equipment, transmission power when the second user equipment sends data to the first user equipment according to the network coverage information of the first user equipment and the network coverage information of the second user equipment includes:
the second user equipment determines the mobile network coverage states of the first user equipment and the second user equipment according to the network coverage information of the first user equipment and the network coverage information of the second user equipment;
the second user equipment determines the transmitting power when the second user equipment sends data to the first user equipment according to the mobile network coverage states of the first user equipment and the second user equipment;
wherein the mobile network coverage status of the first user equipment and the second user equipment comprises any one of the following forms:
the first user equipment and the second user equipment are located in a mobile network coverage area;
neither the first user equipment nor the second user equipment is located in a mobile network coverage area;
the first user equipment is located in a mobile network coverage area, and the second user equipment is not located in the mobile network coverage area;
the first user equipment is not located in a mobile network coverage area, and the second user equipment is located in the mobile network coverage area.
With reference to the first possible implementation manner of the fourth aspect, in a second possible implementation manner of the fourth aspect, the determining, by the second user equipment, transmission power when the second user equipment sends data to the first user equipment according to mobile network coverage states of the first user equipment and the second user equipment includes:
when the second user equipment determines that the first user equipment and the second user equipment are located in a mobile network coverage area and the first user equipment and the second user equipment are served by a first base station, the second user equipment transmits power adjustment information to the first base station, wherein the power adjustment information is used for instructing the first base station to adjust the transmission power and/or time-frequency resources of the first user equipment and the transmission power and/or time-frequency resources of the second user equipment;
and the second user equipment receives the power adjustment response information sent by the first base station, and determines the transmitting power when the second user equipment sends data to the first user equipment according to the power adjustment response information.
With reference to the first possible implementation manner of the fourth aspect, in a third possible implementation manner of the fourth aspect, the determining, by the second user equipment, transmission power when the second user equipment sends data to the first user equipment according to mobile network coverage states of the first user equipment and the second user equipment includes:
when the second user equipment determines that the first user equipment and the second user equipment are located in a mobile network coverage area, the second user equipment is served by a second base station, and the first user equipment is served by a third base station, the second user equipment transmits power adjustment information to the second base station, wherein the power adjustment information is used for instructing the second base station to adjust the transmission power and/or time-frequency resources of the first user equipment and instructing the second base station to communicate with the third base station, so that the third base station adjusts the transmission power and/or time-frequency resources of the first user equipment;
and the second user equipment receives the power adjustment response information sent by the second base station, and determines the transmitting power when the second user equipment sends data to the first user equipment according to the power adjustment response information.
With reference to the first possible implementation manner of the fourth aspect, in a fourth possible implementation manner of the fourth aspect, the determining, by the second user equipment, transmission power when the second user equipment sends data to the first user equipment according to mobile network coverage states of the first user equipment and the second user equipment includes:
and when the second user equipment determines that the first user equipment and the second user equipment are not located in a mobile network coverage area, the second user equipment determines the transmission power when sending data to the first user equipment according to the communication service type or the communication service mode.
With reference to the first possible implementation manner of the fourth aspect, in a fifth possible implementation manner of the fourth aspect, the determining, by the second user equipment, transmission power when the second user equipment sends data to the first user equipment according to mobile network coverage states of the first user equipment and the second user equipment includes:
when the second user equipment determines that the first user equipment is not located in a mobile network coverage area and the second user equipment is located in the mobile network coverage area, the second user equipment acquires the transmitting power used by the first user equipment;
the second user equipment determines the path loss when the first user equipment sends data to the second user equipment according to the transmitting power used by the first user equipment and the measured transmitting power of the first user equipment obtained by the measurement of the second user equipment;
the second user equipment determines the limited transmitting power of the second user equipment according to the path loss and the receiving sensitivity of the first user equipment;
and the second user equipment determines the transmitting power when the second user equipment transmits data to the first user equipment according to the limited transmitting power.
With reference to the fifth possible implementation manner of the fourth aspect, in a sixth possible implementation manner of the fourth aspect, the determining, by the second user equipment, transmission power when the second user equipment sends data to the first user equipment according to the limited transmission power includes:
the second user equipment sends the limited transmitting power to a second base station, and the second base station serves the second user equipment;
and the second user equipment receives the transmission power which is sent by the second base station and is used when the second user equipment sends data to the first user equipment.
With reference to the fifth possible implementation manner of the fourth aspect, in a seventh possible implementation manner of the fourth aspect, the determining, by the second user equipment, transmission power when the second user equipment sends data to the first user equipment according to the limited transmission power includes:
the second user equipment sends the limited transmitting power and the limited time-frequency resource of the second user equipment to a second base station, and the second base station serves the second user equipment;
and the second user equipment receives the transmitting power sent by the second base station when the second user equipment sends data to the first user equipment and the time-frequency resource configured for the second user equipment by the second base station.
With reference to the fifth possible implementation manner of the fourth aspect, in an eighth possible implementation manner of the fourth aspect, the determining, by the second user equipment, transmission power when the second user equipment sends data to the first user equipment according to the limited transmission power includes:
the second user equipment determines the transmitting power which can be used by the current channel according to the current communication service;
and the second user equipment determines the transmitting power when the second user equipment sends data to the first user equipment according to the transmitting power which can be used by the current channel and the limited transmitting power.
With reference to any one of the fifth to the eighth possible implementation manners of the fourth aspect, in a ninth possible implementation manner of the fourth aspect, the method further includes:
the second user equipment acquires available transmission power on a channel corresponding to the second base station communication, the transmission power allowed by the second user equipment and the limited transmission power, and the second base station serves the second user equipment;
and the second user equipment determines the transmission power when the second user equipment sends data to the second base station according to the available transmission power on the channel corresponding to the communication with the second base station, the transmission power allowed by the second user equipment and the limited transmission power.
With reference to the first possible implementation manner of the fourth aspect, in a tenth possible implementation manner of the fourth aspect, the determining, by the second user equipment, transmission power when the second user equipment sends data to the first user equipment according to mobile network coverage states of the first user equipment and the second user equipment includes:
when the second user equipment determines that the first user equipment is located in a mobile network coverage area and the second user equipment is not located in the mobile network coverage area, the second user equipment transmits power adjustment information or transmission resource adjustment information to the first user equipment;
and the second user equipment determines the transmission power when the second user equipment sends data to the first user equipment according to the adjusted transmission power or the adjusted transmission resource of the first user equipment.
In this embodiment, the determination module determines the transmission power when the first user equipment transmits data to the second user equipment, and the data transmission module uses the transmission power to transmit data to the second user equipment, so that the transmission power of the first UE can be controlled in the D2D communication mode instead of using the inherent maximum transmission power.
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 or the prior art will be briefly described below, and it is obvious that the drawings in the following description are only some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to these drawings without creative efforts.
Fig. 1 is a schematic structural diagram of a first user equipment according to a first embodiment of the present invention;
fig. 2 is a schematic structural diagram of a second embodiment of a first user equipment according to the present invention;
fig. 3 is a schematic structural diagram of a third embodiment of a first user equipment according to the present invention;
fig. 4 is a schematic structural diagram of a fourth embodiment of a first user equipment according to the present invention;
fig. 5 is a schematic structural diagram of a first embodiment of a second user equipment according to the present invention;
fig. 6 is a schematic structural diagram of a second user equipment embodiment in accordance with the present invention;
FIG. 7 is a diagram illustrating a mobile network coverage status of a UE;
fig. 8 is a flowchart illustrating a transmit power control method according to a first embodiment of the present invention;
fig. 9 is a flowchart illustrating a second method for controlling transmission power according to the present invention;
fig. 10 is a flowchart illustrating a third method for controlling transmission power according to the present invention;
fig. 11 is a schematic structural diagram of a fifth embodiment of a first user equipment;
fig. 12 is a schematic structural diagram of a third embodiment of a second user equipment in the present invention.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
Fig. 1 is a schematic structural diagram of a first user equipment according to a first embodiment of the present invention. The first user equipment in this embodiment may be any user equipment, and for convenience of description, the user equipment is referred to as the first user equipment. The first user equipment 10 provided by the embodiment of the present invention includes a determining module 101 and a data sending module 102. Wherein,
a determining module 101, configured to determine a transmission power when a first user equipment sends data to a second user equipment;
a data sending module 102, configured to send data to the second user equipment using the transmission power.
In an actual application scenario, a first User Equipment (UE) related in this embodiment is a User Equipment in a D2D communication scenario. The first UE may send data to the second UE by unicast, multicast or broadcast, and the second UE may also send data to the first UE by unicast, multicast or broadcast, thereby implementing D2D communication between the first UE and the second UE. Those skilled in the art will understand that, in this embodiment, all processes related to the first UE sending data to the second UE may be unicast, multicast or broadcast, and processes related to the second UE sending data to the first UE may also be unicast, multicast or broadcast.
When a first UE needs to send data to a second UE, the determining module 101 needs to determine the transmit power when sending the data. In a specific implementation process, the determining module 101 may determine the transmit power according to a communication service type or a communication service mode. For example, when the communication service type is public safety emergency service, the determining module 101 determines that the transmission power is a first transmission power level, specifically, the first transmission power level may correspond to a maximum transmission power of the first UE; when the communication service type is the non-public safety common service, the determining module 101 determines that the transmission power is the second transmission power level. Wherein the first transmit power level is higher than the second power transmit level.
The data sending module 102 sends data to the second user equipment using the transmission power.
In this embodiment, the determination module determines the transmission power when the first user equipment transmits data to the second user equipment, and the data transmission module uses the transmission power to transmit data to the second user equipment, so that the transmission power of the first UE can be controlled in the D2D communication mode instead of using the inherent maximum transmission power.
The following describes a process of determining the transmission power by the determining module 101 of the first UE by using a specific embodiment.
In a possible implementation manner, the determining module 101 is specifically configured to: and determining the transmitting power when the first user equipment transmits data to the second user equipment according to the communication service type.
The communication service types comprise public safety emergency services and non-public safety common services, the transmitting power corresponding to the public safety emergency services is a first transmitting power grade, the transmitting power corresponding to the non-public safety common services is a second transmitting power grade, and the first transmitting power grade is higher than the second transmitting power grade.
In a specific implementation process, the current application scenario of D2D mainly includes public safety emergency services and non-public safety ordinary services. The non-public safety common Service can be further subdivided according to Quality of Service (QoS) grades, and different QoS grades have different priorities. In this embodiment, different communication service types correspond to different transmission powers of the first UE, so that a communication service with a higher rank can obtain a more guaranteed service.
The corresponding relationship between the public safety emergency service and the non-public safety ordinary service and the transmission power is shown in the table I.
Watch 1
Communication service type indication Type of communication service Maximum allowed transmission power value
0 Public safety emergency services 31dBm
1 Non-public safety common service 23dBm
In a specific application process, the determining module 101 may determine a communication service type according to the communication service type indication; the determining module 101 may also obtain the authority to use the public safety emergency service by sending a key used by the public safety emergency service to the serving base station to obtain the authorization authentication method when there is network coverage. When the communication service type is determined to be public safety emergency service, a first transmission power level, namely the highest level, is configured for the public safety emergency service. The maximum transmit power value for operation at the first transmit power level may be set to 31dBm because in public safety events, it is possible that existing communication means may fail, such as in an earthquake scene, where the conventionally used cellular network may not be available. Or in a large fire site, repeaters in the building may not be able to provide signals and base stations outside the building may not transmit signals. Under these scenarios, D2D devices need to be used to communicate with each other, and the transmit power priority is of course the highest. For public safety emergency services, it can be guaranteed that the public safety emergency services can receive the most advanced services only with a sufficiently high transmission power, so as to ensure the implementation of necessary communication functions. When the determining module 101 determines that the communication service type is a non-public safety normal service, a second transmission power level is configured for the non-public safety normal service, where the second transmission power level is lower than the first transmission power level, and an allowed maximum transmission power value corresponding to the second transmission power level may be set to 23 dBm.
Further, the non-public safety common service includes common services with different service quality levels, the second transmission power level includes a plurality of second transmission power sub-levels, and the second transmission power sub-level corresponding to the common service corresponds to the service quality of the common service, for example, as shown in table two.
TABLE 2
Communication service type indication Type of communication service Maximum allowed transmission power value
00 Session service 23dBm
01 Streaming service 20dBm
10 Interactive service 18dBm
11 Background business 16dBm
In a specific application process, the determining module 101 may determine the communication service type according to the communication service type indication. In particular, session services include voice and video conferencing, which have the highest requirements for quality of service and real-time performance. Streaming services include streaming audio and video, which require less quality of service and real-time performance. The interactive service includes web browsing and other services, and the background service includes e-mail, short message and other services. Interactive services and background services have minimal requirements on quality of service and real-time. In non-public safety scenarios, the first UE often has another means of communication or, if not, currently no particularly urgent communication needs. Therefore, in this scenario, it is sufficient for the first UE to use a normal smaller transmit power.
Furthermore, each service can select a certain transmission power value under the limit of the allowed maximum transmission power value, and when the service quality can not meet the requirement, the transmission power can be increased step by step. Or, directly, the first UE initially transmits signals at the allowed maximum transmission power value corresponding to its traffic type.
As will be understood by those skilled in the art, the transmission power corresponding to the public safety emergency service may have a certain impact on the non-public safety general service, so that the first UE cannot use the transmission power corresponding to the public safety emergency service under an unnecessary condition, and the time for using the public safety emergency service needs to be limited.
In another possible implementation manner, the first user equipment 10 provided in the embodiment of the present invention further includes a determining module 103, which is specifically shown in fig. 2. Fig. 2 is a schematic structural diagram of a second embodiment of a first user equipment according to the present invention.
Specifically, the determining module 101 is specifically configured to: determining the transmitting power when the first user equipment transmits data to the second user equipment according to the communication service mode;
wherein the communication traffic mode comprises normal mode communication, fallback mode communication and interference mode communication.
A determining module 103, configured to, before the determining module 101 determines, according to the communication service mode, the transmission power when the first user equipment sends data to the second user equipment,
determining an available channel for transmitting data to the second user equipment;
and judging whether the available channel is occupied, if not, determining that the communication service mode is the normal communication mode, if so, judging whether the channel running on the occupied channel is a public safety emergency service, if so, determining that the communication service mode is the yielding mode communication, and if not, determining that the communication service mode is the interference mode communication.
In a specific application scenario, a channel for transmitting data by a first UE is divided into a plurality of small sub-channels in a frequency domain, and different UEs select a part of the sub-channels to transmit. In the present embodiment, the available channels involved are specifically available subchannels. The decision module 103 determines all available channels. The method for determining the available channel comprises the following steps: if the network coverage exists, acquiring an indication signaling of the available channel configuration resource from the network; if there is no network coverage, the set of all available channels is determined in a predefined manner. The determining module 103 determines whether the available channel is occupied according to the Received Signal Power on the available channel, where the criterion of the determination is whether the Received Signal Power is lower than a specific threshold, and if the Reference Signal Received Power (RSRP) on the subcarrier is not greater than-112 dBm under the LTE system parameters, the channel is considered as the available channel, otherwise, the channel is considered as the occupied channel. If there is an unoccupied available channel, the determining module 103 determines that the communication service mode is a normal communication mode. If all available channels are occupied, the determining module 103 needs to further detect whether a public safety emergency service is sent on the occupied available channels, if so, the determining module 103 determines that the communication service mode is a deferral mode for communication, and if not, the determining module 103 determines that the communication service mode is an interference mode for communication. The method for judging whether the channel is occupied by the public safety emergency service needs to further receive an indication signaling used by the public safety emergency service contained in the high RSRP value channel besides judging the RSRP value. The method for judging whether the channel is occupied by the public safety emergency service can also be as follows: reading public safety emergency services of the respective channels in the broadcast control channel is an indication signaling used. If the indication signaling of the confirmation is received, the detected sub-channel is indicated to use the public safety emergency service. The current channel is determined to be in interference mode by determining whether the RSRP value on the detected channel is greater than a specified threshold of 1 (e.g., -112dBm) and less than the upper limit of the available RSRP value of 2 (e.g., -100dBm), and if these conditions are met, indicating that the channel is in interference mode.
In a specific implementation process, after the determining module 103 determines a specific communication service mode, the determining module 101 determines, according to the communication service mode, a transmission power when the first user equipment sends data to the second user equipment, and according to different communication service modes, a specific implementation manner is as follows.
In normal mode communication, the determining module 101 determines, according to the communication service type, the transmission power when the first user equipment sends data to the second user equipment, and sends the data to the second user equipment on an unoccupied available channel.
Specifically, the determining module 101 determines the transmission power when the first user equipment sends data to the second user equipment according to the communication service type, which may refer to the description of the foregoing embodiment, and this embodiment is not described herein again.
In the fallback mode communication, the determining module 101 determines that the transmission power when transmitting data to the second user equipment is lower than the transmission power when the first user equipment transmits data to the second user equipment when performing public safety emergency service.
Specifically, the determination module 101 will try not to use the channel used by the public safety emergency service, and if it cannot be avoided (e.g. all available channels are occupied by the public safety emergency service), the determination module 101 uses the fallback mode for communication. In the fallback mode communication, the determining module 101 determines that the transmission power when transmitting data to the second user equipment is lower than the transmission power when the first user equipment transmits data to the second user equipment when performing public safety emergency service.
In interference mode communication, the determining module 101 determines the transmission power when transmitting data to the second user equipment according to the interference condition of the available channel.
Specifically, the determination module 101 determines that the available channel to be used by the UE is already being used by other UEs for communication in the normal mode. I.e., the available channel is interfered with, when the first UE traffic pattern belongs to interference mode communication. In interference mode communications, the determination module 101 may use slightly lower transmit power than in normal mode communications to reduce the impact on the UE that is transmitting data. Or, the determining module 101 sets its own transmit power according to the interference condition of the available channel to be transmitted, so as to ensure that the target receiver can obtain a signal with a certain strength. Wherein the interference condition comprises an interference signal strength.
In a specific implementation process, whether the first UE is located in a network coverage area or not, the transmit power of the first UE may be determined according to the method described above.
Fig. 3 is a schematic structural diagram of a third embodiment of the first user equipment in the present invention. On the basis of the embodiments of fig. 1 and fig. 2, the first user equipment 10 further includes: a request sending module 104 and a receiving module 105. In the present embodiment, fig. 3 is shown on the basis of the embodiment of fig. 2.
The request sending module 104 is configured to send a power request message to a base station when the first user equipment is located in a coverage area of a mobile communication network, where the power request message includes channel usage information acquired by the first user equipment, so that the base station determines a transmission power of the first user equipment according to the channel usage information;
the receiving module 105 is configured to receive a power response message sent by the base station, where the power response message includes a transmission power of the first user equipment;
the determining module 101 is further configured to determine, if the transmission power determined by the determining module is different from the transmission power determined by the base station, that the transmission power determined by the base station is the transmission power when data is sent to the second user equipment.
When the first user equipment is located in the coverage area of the mobile communication network, the request sending module 104 sends a power request message to a base station (including various types of base station equipment, such as macro station, micro station, pico station, and Relay node for relaying), where the power request message includes channel usage information (i.e., includes one or more of information about which channels are fully available, which channels are in an interference state (including a level of interference power), which channels are used by emergency services, and the like) acquired by the first user equipment, and the base station determines the transmission power of the first user equipment according to the channel usage information. The receiving module 105 receives a power response message sent by the base station, where the power response message includes the transmission power of the first user equipment;
if the determining module 101 determines that the transmission power determined by the first user equipment is different from the transmission power determined by the base station, it determines that the transmission power determined by the base station is the transmission power when the data is sent to the second user equipment.
In this embodiment, the first user equipment determines the transmission power when the first user equipment transmits data to the second user equipment, and the first user equipment transmits data to the second user equipment by using the transmission power, so that the transmission power of the first UE can be controlled in the D2D communication mode instead of using the inherent maximum transmission power.
Fig. 4 is a schematic structural diagram of a fourth embodiment of the first user equipment in the present invention. On the basis of the embodiments in fig. 1 to fig. 3, the first user equipment 10 further includes: further comprising: and an information sending module 106. This embodiment is illustrated on the basis of the embodiment of fig. 3.
An information sending module 106, configured to send, to the second user equipment, the transmission power used by the first user equipment and/or the network coverage information of the first user equipment, so that the second user equipment determines the transmission power.
The first user equipment provided by the embodiment of the invention not only can determine the transmission power by the first user equipment, but also can enable the second user equipment to determine the transmission power.
Fig. 5 is a schematic structural diagram of a first embodiment of a second user equipment according to the present invention. The second user equipment in this embodiment may be any user equipment, and for convenience of description, the user equipment is referred to as the second user equipment. The second user equipment 20 provided in the embodiment of the present invention includes: a receiving module 201 and a determining module 202.
A receiving module 201, configured to receive network coverage information of a first user equipment, where the network coverage information is sent by the first user equipment;
a determining module 202, configured to determine, according to the network coverage information of the first user equipment and the network coverage information of the second user equipment, a transmission power when the second user equipment sends data to the first user equipment.
The application scenario of this embodiment is similar to that of the embodiment in fig. 1, and this embodiment is not described herein again.
The receiving module 201 receives a D2D signal transmitted by the first UE. Wherein the first UE transmits the network coverage information to the second UE by transmitting a D2D signal. The signal of D2D transmitted by the first UE is transmitted on the D2D resource, which is different from the uplink signal within the network transmitted by the first UE. The difference is that the occupied resources are different during transmission, and the signal formats and modes are different during transmission. For example, in Frequency Division Duplex (FDD), the resource of the D2D link is taken out from the uplink of Long Term Evolution (LTE). In a mobile cellular communication system, a first UE transmits a D2D signal on a cellular link, also in uplink, but the location of the time-frequency resources is different from the uplink signal.
In particular, the second UE detects an existing cellular network and determines whether the second UE is already resident under one of the networks. For example, the second UE detects and resides under a Global System for mobile communications (GSM) network, a third Generation mobile communications (3G) network, or a Long Term Evolution (LTE) network. The information is the network coverage information of the second UE.
The determining module 202 determines mobile network coverage states of the first UE and the UE according to the network coverage information of the first UE and the network coverage information of the second UE, and the determining module 202 determines a transmission power when the second UE transmits data to the first UE according to the mobile network coverage states of the first UE and the second UE.
The second user equipment provided by the embodiment of the invention receives the network coverage information of the first user equipment, which is sent by the first user equipment, through the receiving module; the determining module determines the transmission power when the second user equipment sends data to the first user equipment according to the network coverage information of the first user equipment and the network coverage information of the second user equipment, so that the transmission power of the second UE can be controlled in the D2D communication mode instead of adopting the inherent maximum transmission power.
Fig. 6 is a schematic structural diagram of a second user equipment embodiment of the present invention. In this embodiment, on the basis of the embodiment in fig. 5, the determining module 202 includes:
a state determining unit 2021, configured to determine mobile network coverage states of the first user equipment and the second user equipment according to the network coverage information of the first user equipment and the network coverage information of the second user equipment;
a power determining unit 2022, configured to determine, according to mobile network coverage states of the first user equipment and the second user equipment, a transmission power when the second user equipment sends data to the first user equipment;
wherein the mobile network coverage status of the first user equipment and the second user equipment comprises any one of the following forms:
the first user equipment and the second user equipment are located in a mobile network coverage area;
neither the first user equipment nor the second user equipment is located in a mobile network coverage area;
the first user equipment is located in a mobile network coverage area, and the second user equipment is not located in the mobile network coverage area;
the first user equipment is not located in a mobile network coverage area, and the second user equipment is located in the mobile network coverage area.
The mobile network coverage of the first UE and the second UE may be specifically as shown in fig. 7. Fig. 7 is a diagram illustrating a mobile network coverage status of a ue. For convenience of drawing, in fig. 7, the respective UEs are distinguished in the manner of UE1 to UE 6.
Wherein the mobile network coverage status of the first UE and the second UE includes any one of the following forms:
a first UE (UE4) and a second UE (UE5) are located in a mobile network coverage area;
neither the first UE (UE1) nor the second UE (UE3) is located in a mobile network coverage area;
a first UE (UE7) is located in a mobile network coverage area, a second UE (UE8) is not located in the mobile network coverage area;
the first UE (UE1) is not located in the mobile network coverage area and the second UE (UE2) is located in the mobile network coverage area.
With reference to fig. 7 and a specific embodiment, the following describes in detail the determination of the transmission power by the power determination unit 2022 when the second UE sends data to the first UE according to the network coverage information of the first UE and the network coverage information of the second UE, including four cases.
In the first case, when the state determination unit 2021 determines that the first UE (UE5) and the second UE (UE4) are located in the mobile network coverage area, two possible implementations are included.
In a possible implementation manner, when the state determining unit 2021 determines that the first user equipment and the second user equipment are located in a mobile network coverage area, and the first user equipment and the second user equipment are served by a first base station, the power determining unit 2022 is specifically configured to:
transmitting power adjustment information to the first base station, wherein the power adjustment information is used for instructing the first base station to adjust the transmission power and/or time-frequency resources of the first user equipment and the transmission power and/or time-frequency resources of the second user equipment;
and receiving power adjustment response information sent by the first base station, and determining the transmitting power when the second user equipment sends data to the first user equipment according to the power adjustment response information.
Specifically, the first UE and the second UE are served by the same base station, but the first UE and the second UE belong to different D2D communication groups. The second UE may require the first base station to readjust the transmit power used and/or the time-frequency resources used by the first UE and/or the second UE in order to coordinate the D2D link between the two communication groups.
In another possible implementation manner, when the state determining unit 2021 determines that the first user equipment and the second user equipment are located in a coverage area of a mobile network, the second user equipment is served by a second base station, and the first user equipment is served by a third base station (not shown in fig. 7), the power determining unit 2022 is specifically configured to:
transmitting power adjustment information to the second base station, wherein the power adjustment information is used for instructing the second base station to adjust the transmission power and/or the time-frequency resource of the first user equipment, and instructing the second base station to communicate with the third base station, so that the third base station adjusts the transmission power and/or the time-frequency resource of the first user equipment;
and receiving power adjustment response information sent by the second base station, and determining the transmitting power when the second user equipment sends data to the first user equipment according to the power adjustment response information.
Specifically, if the first UE and the second UE belong to different base stations, that is, the second UE is served by the second base station and the first UE is served by the third base station, the second UE may send a request for the first UE to adjust power and/or time-frequency resources to the second base station, and then the second base station requests the third base station to reconfigure power and/or time-frequency resources for the first UE through the X2 interface.
In the second case, when the status determining unit 2021 determines that neither the first UE (UE3) nor the second UE (UE1) is located in the coverage area of the mobile network, the power determining unit 2022 is specifically configured to determine the transmit power when transmitting data to the first UE according to the communication traffic type or the communication traffic pattern.
In a specific implementation process, the second UE determines, according to the communication service type or the communication service mode, an implementation manner of the transmit power when sending data to the first UE, which is similar to the implementation manner of the transmit power when the first UE determines, according to the communication service type or the communication service mode, to send data to the second UE, reference may be made to the above embodiments, and details of this embodiment are not repeated here.
In a third case, when the state determining unit 2021 determines that the first UE (UE1) is not located in the mobile network coverage area and the second UE (UE2) is located in the mobile network coverage area, the power determining unit 2022 is specifically configured to:
acquiring the transmitting power used by the first user equipment;
determining the path loss when the first user equipment sends data to the second user equipment according to the transmitting power used by the first user equipment and the measured transmitting power of the first user equipment measured and obtained by the second user equipment;
determining the limited transmitting power of the second user equipment according to the path loss and the receiving sensitivity of the first user equipment;
and determining the transmitting power when the second user equipment transmits data to the first user equipment according to the limited transmitting power.
Specifically, when the first UE is not located in the coverage area of the mobile network and the second UE is located in the coverage area of the mobile network, the power determining unit 2022 determines the transmission power according to a principle that the second UE avoids interference to the first UE as much as possible.
In order to confirm whether the second UE will interfere with the first UE, further measurement and calculation of the path loss between the first UE and the second UE are required. The calculation method comprises the following steps: when a first UE sends a signal, it needs to indicate its transmit power Ptx to a second UE that receives its transmitted signal. Power determination unit 2022 after receiving the information of the transmission power value Ptx indicated by the first UE, power determination unit 2022 further measures the measured transmission power Rtx from the first UE signal, and power determination unit 2022 calculates the Path Loss (PL) from the first UE to the second UE as: PL ═ Ptx-Rtx. If Ptx is 23dBm and Rtx is-100 dBm, PL is 123 dB. After the PL value is calculated, the second UE also needs to calculate the UE limited maximum power value. Assuming that the first UE's D2D link minimum receive sensitivity is R0, then the second UE's transmit power is Ptx _ m ≦ PL + R0. If PL is 123dB, R0 is-110 dBm, then Ptx _ m is less than or equal to 13 dBm. Since the second UE is to protect the D2D link of the first UE, the limited transmit power value for the second UE is 13dBm (PL + R0).
Then, the power determining unit 2022 determines the transmission power when the second UE transmits data to the first UE according to the limited transmission power. The method specifically comprises the following possible implementation modes:
in a possible implementation manner, the power determining unit 2022 is further specifically configured to: transmitting the limited transmit power to a second base station, the second base station serving the second user equipment; and receiving the transmission power sent by the second base station when the second user equipment sends data to the first user equipment.
In another possible implementation manner, the power determining unit 2022 is further specifically configured to: sending the limited transmitting power and the limited time-frequency resource of the second user equipment to a second base station, wherein the second base station serves the second user equipment; and receiving the transmitting power sent by the second base station when the second user equipment sends data to the first user equipment and the time-frequency resource configured for the second user equipment by the second base station.
Specifically, the power determining unit 2022 reports the limited transmission power value Ptx _ m and the corresponding limited time-frequency resource to the second base station, and the second base station reallocates the time-frequency resource and/or the transmission power value for transmission to the second UE. For the D2D link of the second UE, if the second UE uses too little transmit power, the effect of reception by the target UE may be affected. Since the second UE is within mobile network coverage, the second UE may require the second base station to reallocate available D2D transmission resources for the second UE. If the second UE is transmitting on a cellular link, one way is that the second UE may refrain from transmitting on the network on the D2D link of the first UE by requiring the second base station to switch time and frequency resources for it. Another way is that, if the transmission power of the second UE is adjusted, the level of a Modulation and Coding Scheme (MCS) that can be supported may also change, and the number of time-frequency resources that need to be used may also change correspondingly, and at this time, the second base station needs to reassign the time-frequency resources (including the size and position of the resources) for transmission to the second UE.
In another possible implementation manner, the power determining unit 2022 is further specifically configured to:
determining the transmitting power which can be used by the current channel according to the current communication service;
and determining the transmitting power when the second user equipment transmits data to the first user equipment according to the transmitting power which can be used by the current channel and the limited transmitting power.
The second UE decides on its own the transmit power that can be employed. In a specific implementation, the second UE may communicate using both links. One link is a D2D link (UE2-UE1), under which a second UE may communicate directly with a first UE, under the D2D link. One is a cellular link (UE 2-second base station) under which the second UE communicates with a serving base station of the second UE, the second UE enabling communication of the second UE with other UEs (e.g., UE6) by communicating with the second base station. Specifically, for the D2D link, the second UE may take the minimum value min (Ptx, Ptx _ m) of the transmission power Ptx usable by the current channel corresponding to the current communication service and the limited transmission power Ptx _ m as its transmission power, that is: ptx ═ Min (Ptx _ c, Ptx _ m), thereby communicating with the first UE. The method has the advantages that no further assistance of the eNB is needed, and the process of signaling interaction is reduced.
On the basis of the foregoing various implementations, when the status determining unit 2021 determines that the first user equipment is not located in a mobile network coverage area and the second user equipment is located in a mobile network coverage area, the power determining unit 2022 is further configured to: acquiring available transmitting power on a channel corresponding to the second base station communication, transmitting power allowed by the second user equipment and the limited transmitting power, wherein the second base station serves the second user equipment;
and determining the transmission power when the second user equipment sends data to the second base station according to the transmission power which can be used on the channel corresponding to the communication of the second base station, the transmission power allowed by the second user equipment and the limited transmission power.
For the cellular link, the second UE determines, from the current cellular link, the transmission power P that can be used by each Channel, for example, a Physical Uplink Shared Channel (PUSCH), a Physical Uplink Control Channel (PUCCH), a Sounding Reference Signal (SRS)alpha(where alpha denotes one or more of the PUSCH, PUCCH, SRS channels or signals), and the allowed transmit power P for the second UECMAC，cAnd the minimum value of the limited transmit power Ptx _ m, i.e., Ptx ═ Min (P)CMAx，c，PalphaPtx _ m) to communicate with the second base station using the transmission power corresponding to the minimum value.
In a fourth case, when the state determining module 2021 determines that the first user equipment is located in a coverage area of a mobile network and the second user equipment is not located in the coverage area of the mobile network, the power determining unit 2022 is specifically configured to: transmitting power adjustment information or transmission resource adjustment information to the first user equipment;
and determining the transmitting power when the second user equipment transmits data to the first user equipment according to the adjusted transmitting power or the adjusted transmitting resource of the first user equipment.
In particular, the second UE may attempt to establish a D2D link with the first UE, and then the power determination unit 2022 requires the first UE to reconfigure transmit power or reallocate time-frequency resources for transmission. This includes the case where the first UE is using a D2D link or a cellular link. After receiving the request of the second UE, the first UE may decide itself or report the information of the corresponding request to the serving base station of its own, and ask the serving base station of its own to help decide whether and how to satisfy the request of the second UE.
To sum up, the second user equipment provided in the embodiment of the present invention receives, through the receiving module, the network coverage information of the first user equipment, which is sent by the first user equipment; the determining module determines the transmission power when the second user equipment sends data to the first user equipment according to the network coverage information of the first user equipment and the network coverage information of the second user equipment, so that the transmission power of the second UE can be controlled in the D2D communication mode instead of adopting the inherent maximum transmission power.
Fig. 8 is a flowchart illustrating a transmit power control method according to a first embodiment of the present invention. The execution subject of the method is any user equipment, and the user equipment can be realized by any software and/or hardware. In this embodiment, for convenience of description, the user equipment is referred to as a first user equipment. As shown in fig. 8, the transmission power control method provided in this embodiment includes:
step 801, a first user equipment determines the transmission power when the first user equipment sends data to a second user equipment;
step 802, the first user equipment sends data to the second user equipment by using the transmission power.
The power control method provided in the embodiment of the present invention can be implemented by the first user equipment provided in the above embodiment, and the implementation principle and technical effect are similar, which are not described herein again.
The following describes a process of determining the transmission power by the first UE according to a specific embodiment.
In one possible implementation manner, the first user equipment determines the transmission power when the first user equipment sends data to the second user equipment according to the communication service type.
The communication service types comprise public safety emergency service and non-public safety common service, the transmitting power corresponding to the public safety emergency service is a first transmitting power grade, the transmitting power corresponding to the non-public safety common service is a second transmitting power grade, and the first transmitting power grade is higher than the second transmitting power grade.
Optionally, the non-public safety common service includes common services of different service quality levels, the second transmission power level includes a plurality of second transmission power sub-levels, and the second transmission power sub-level corresponding to the common service corresponds to the service quality of the common service.
Furthermore, each service can select a certain transmission power value under the limit of the allowed maximum transmission power value, and when the service quality can not meet the requirement, the transmission power can be increased step by step. Or, directly, the UE initially transmits signals at the maximum allowed transmission power value corresponding to its traffic type.
In another possible implementation manner, the first user equipment determines the transmission power when the first user equipment transmits data to the second user equipment according to a communication service mode, where the communication service mode includes normal mode communication, fallback mode communication, and interference mode communication.
In a specific implementation process, before determining the transmission power when the first user equipment sends data to the second user equipment according to the communication service mode, the communication service mode is determined. Fig. 9 is a flowchart of a second method for controlling transmission power according to the present invention, and describes a process of determining a communication service mode by a first UE, as shown in fig. 9, the method provided in the embodiment of the present invention includes:
step 901, the first user equipment determines an available channel for sending data to the second user equipment;
step 902, the first user equipment determines whether the available channel is occupied, if not, step 903 is executed, and if so, step 904 is executed;
step 903, the first user equipment determines that the communication service mode is a normal communication mode;
step 904, the first user equipment judges whether the operation on the occupied channel is the public safety emergency service, if so, step 905 is executed, and if not, step 906 is executed;
step 905, the first user equipment determines that the communication service mode is the deferral mode communication;
step 906, the first user equipment determines that the communication service mode is the interference mode communication.
In various communication modes, the first user equipment determines the transmission power as follows:
under the normal mode communication, the first user equipment determines the transmitting power when transmitting data to the second user equipment according to the communication service type, and transmits the data to the second user equipment on an unoccupied available channel; or
In the fallback mode communication, the first user equipment determines that the transmission power when transmitting data to the second user equipment is lower than the transmission power when the first user equipment transmits data to the second user equipment when performing public safety emergency service; or
And under the interference mode communication, the first user equipment determines the transmission power when transmitting data to the second user equipment according to the interference condition of the available channel.
On the basis of the above embodiment, when the first user equipment is located in a coverage area of a mobile communication network, the first user equipment sends a power request message to a base station, where the power request message includes channel usage information acquired by the first user equipment, so that the base station determines the transmission power of the first user equipment according to the channel usage information;
the first user equipment receives a power response message sent by the base station, wherein the power response message comprises the transmission power of the first user equipment;
if the first user equipment determines that the transmission power determined by the first user equipment is different from the transmission power determined by the base station, the first user equipment determines that the transmission power determined by the base station is the transmission power when data is sent to the second user equipment.
On the basis of the above embodiment, the method further includes:
the first user equipment sends the transmission power used by the first user equipment and/or the network coverage information of the first user equipment to the second user equipment so as to enable the second user equipment to determine the transmission power.
The power control method provided in the embodiment of the present invention can be implemented by the first user equipment provided in the above embodiment, and the implementation principle and technical effect are similar, which are not described herein again.
Fig. 10 is a flowchart illustrating a third method for controlling transmission power according to the present invention. The execution subject of the method is any user equipment, and the user equipment can be realized by any software and/or hardware. In this embodiment, for convenience of description, the ue is referred to as a second ue. As shown in fig. 10, the transmission power control method provided in this embodiment includes:
step 1001, receiving, by a second user equipment, network coverage information of a first user equipment, which is sent by the first user equipment;
step 1002, the second user equipment determines, according to the network coverage information of the first user equipment and the network coverage information of the second user equipment, a transmission power when the second user equipment sends data to the first user equipment.
The power control method provided in the embodiment of the present invention can be implemented by the second user equipment provided in the above embodiment, and the implementation principle and technical effect are similar, which are not described herein again.
In a specific implementation process, the determining, by the second user equipment, the transmission power when the second user equipment sends data to the first user equipment according to the network coverage information of the first user equipment and the network coverage information of the second user equipment includes:
the second user equipment determines the mobile network coverage states of the first user equipment and the second user equipment according to the network coverage information of the first user equipment and the network coverage information of the second user equipment;
the second user equipment determines the transmitting power when the second user equipment sends data to the first user equipment according to the mobile network coverage states of the first user equipment and the second user equipment;
wherein the mobile network coverage status of the first user equipment and the second user equipment comprises any one of the following forms:
the first user equipment and the second user equipment are located in a mobile network coverage area;
neither the first user equipment nor the second user equipment is located in a mobile network coverage area;
the first user equipment is located in a mobile network coverage area, and the second user equipment is not located in the mobile network coverage area;
the first user equipment is not located in a mobile network coverage area, and the second user equipment is located in the mobile network coverage area.
The following describes in detail the determination of the transmission power of the second UE to the first UE according to the network coverage information of the first UE and the network coverage information of the second UE by using a specific embodiment, which includes four cases.
In the first case, when the second UE determines that the first UE and the second UE are located in the coverage area of the mobile network, two possible implementations are included.
In a possible implementation manner, when the second user equipment determines that the first user equipment and the second user equipment are located in a mobile network coverage area and the first user equipment and the second user equipment are served by a first base station, the second user equipment transmits power adjustment information to the first base station, where the power adjustment information is used to instruct the first base station to adjust transmission power and/or time-frequency resources of the first user equipment and transmission power and/or time-frequency resources of the second user equipment; and the second user equipment receives the power adjustment response information sent by the first base station, and determines the transmitting power when the second user equipment sends data to the first user equipment according to the power adjustment response information.
In another possible implementation manner, when the second user equipment determines that the first user equipment and the second user equipment are located in a mobile network coverage area, the second user equipment is served by a second base station, and the first user equipment is served by a third base station, the second user equipment transmits power adjustment information to the second base station, where the power adjustment information is used to instruct the second base station to adjust transmission power and/or time-frequency resources of the first user equipment, and instruct the second base station to communicate with the third base station, so that the third base station adjusts transmission power and/or time-frequency resources of the first user equipment; and the second user equipment receives the power adjustment response information sent by the second base station, and determines the transmitting power when the second user equipment sends data to the first user equipment according to the power adjustment response information.
In a second case, when the second user equipment determines that neither the first user equipment nor the second user equipment is located in the coverage area of the mobile network, the second user equipment determines the transmission power when transmitting data to the first user equipment according to the communication service type or the communication service mode.
In a third case, when the second user equipment determines that the first user equipment is not located in a mobile network coverage area and the second user equipment is located in the mobile network coverage area, the second user equipment obtains the transmission power used by the first user equipment; the second user equipment determines the path loss when the first user equipment sends data to the second user equipment according to the transmitting power used by the first user equipment and the measured transmitting power of the first user equipment obtained by the measurement of the second user equipment; the second user equipment determines the limited transmitting power of the second user equipment according to the path loss and the receiving sensitivity of the first user equipment; and the second user equipment determines the transmitting power when the second user equipment transmits data to the first user equipment according to the limited transmitting power.
Then, the second UE determines the transmission power when the second UE transmits data to the first UE according to the limited transmission power. The method specifically comprises the following possible implementation modes:
in one possible implementation, the second user equipment sends the limited transmit power to a second base station, and the second base station serves the second user equipment;
and the second user equipment receives the transmission power which is sent by the second base station and is used when the second user equipment sends data to the first user equipment.
Another possible implementation manner, where the determining, by the second user equipment, the transmission power when the second user equipment sends data to the first user equipment according to the limited transmission power includes:
the second user equipment sends the limited transmitting power and the limited time-frequency resource of the second user equipment to a second base station, and the second base station serves the second user equipment;
and the second user equipment receives the transmitting power sent by the second base station when the second user equipment sends data to the first user equipment and the time-frequency resource configured for the second user equipment by the second base station.
In another possible implementation manner, the determining, by the second user equipment, the transmission power when the second user equipment sends data to the first user equipment according to the limited transmission power includes:
the second user equipment determines the transmitting power which can be used by the current channel according to the current communication service;
and the second user equipment determines the transmitting power when the second user equipment sends data to the first user equipment according to the transmitting power which can be used by the current channel and the limited transmitting power.
On the basis of the possible implementation manner, when the first user equipment is not located in a coverage area of a mobile network and the second user equipment is located in the coverage area of the mobile network, the method further includes:
the second user equipment acquires available transmission power on a channel corresponding to the second base station communication, the transmission power allowed by the second user equipment and the limited transmission power, and the second base station serves the second user equipment;
and the second user equipment determines the transmission power when the second user equipment sends data to the second base station according to the available transmission power on the channel corresponding to the communication with the second base station, the transmission power allowed by the second user equipment and the limited transmission power.
In a fourth case, when the second user equipment determines that the first user equipment is located in a mobile network coverage area and the second user equipment is not located in the mobile network coverage area, the second user equipment transmits power adjustment information or transmission resource adjustment information to the first user equipment;
and the second user equipment determines the transmission power when the second user equipment sends data to the first user equipment according to the adjusted transmission power or the adjusted transmission resource of the first user equipment.
The power control method provided in the embodiment of the present invention can be implemented by the second user equipment provided in the above embodiment, and the implementation principle and technical effect are similar, which are not described herein again.
Fig. 11 is a schematic structural diagram of a fifth embodiment of a first user equipment according to the present invention. The first user equipment in this embodiment may be any user equipment, and for convenience of description, the user equipment is referred to as the first user equipment. The first user equipment 110 provided by the embodiment of the present invention includes a processor 1101, a transmitter 1102 and a receiver 1103. Wherein,
a processor 1101 configured to determine a transmit power when the first user equipment transmits data to the second user equipment;
a transmitter 1102 for transmitting data to the second user equipment using the transmission power.
The implementation principle and technical effect of the first user equipment provided in the embodiment of the present invention are similar to those of the first user equipment provided in the above embodiment, and details are not repeated here.
Optionally, the processor 1101 is specifically configured to:
determining the transmitting power when the first user equipment transmits data to the second user equipment according to the communication service type;
the communication service types comprise public safety emergency services and non-public safety common services, the transmitting power corresponding to the public safety emergency services is a first transmitting power grade, the transmitting power corresponding to the non-public safety common services is a second transmitting power grade, and the first transmitting power grade is higher than the second transmitting power grade.
Optionally, the non-public safety common service includes common services of different service quality levels, the second transmission power level includes a plurality of second transmission power sub-levels, and the second transmission power sub-level corresponding to the common service corresponds to the service quality of the common service.
Optionally, the processor 1101 is specifically configured to:
determining the transmitting power when the first user equipment transmits data to the second user equipment according to the communication service mode;
wherein the communication traffic mode comprises normal mode communication, fallback mode communication and interference mode communication.
Optionally, the processor 1101 is further configured to: before determining the transmission power when the first user equipment transmits data to the second user equipment according to the communication service mode, the first user equipment determines an available channel for transmitting the data to the second user equipment;
and judging whether the available channel is occupied, if not, the first user equipment determines that the communication service mode is the normal communication mode, if so, judging whether the channel which is occupied runs public safety emergency service, if so, determining that the communication service mode is the yielding mode communication, and if not, determining that the communication service mode is the interference mode communication.
Optionally, the processor 1101 is specifically configured to:
under the normal mode communication, determining the transmitting power when transmitting data to the second user equipment according to the communication service type, and transmitting the data to the second user equipment on an unoccupied available channel; or
Determining that the transmission power when transmitting data to the second user equipment is lower than the transmission power when the first user equipment transmits data to the second user equipment when performing public safety emergency service in the fallback mode communication; or
And under the interference mode communication, determining the transmission power when transmitting data to the second user equipment according to the interference condition of the available channel.
Optionally, the transmitter 1102 is configured to send a power request message to a base station when the first user equipment is located in a coverage area of a mobile communication network, where the power request message includes channel usage information acquired by the first user equipment, so that the base station determines the transmission power of the first user equipment according to the channel usage information;
the receiver 1103 is further configured to receive a power response message sent by the base station, where the power response message includes the transmit power of the first user equipment;
the processor 1101 is further configured to: and if the first user equipment determines that the transmitting power determined by the first user equipment is different from the transmitting power determined by the base station, determining the transmitting power determined by the base station as the transmitting power when the second user equipment transmits data.
Optionally, the transmitter 1102 is further configured to: and sending the transmission power used by the first user equipment and/or the network coverage information of the first user equipment to the second user equipment so as to enable the second user equipment to determine the transmission power.
The implementation principle and technical effect of the first user equipment provided in the embodiment of the present invention are similar to those of the first user equipment provided in the above embodiment, and details are not repeated here.
Fig. 12 is a schematic structural diagram of a third embodiment of a second user equipment in the present invention. The second user equipment in this embodiment may be any user equipment, and for convenience of description, the user equipment is referred to as the second user equipment. The second user equipment 120 provided in the embodiment of the present invention includes: a receiver 1201, a processor 1202 and a transmitter 1203. Wherein,
a receiver 1201, configured to receive network coverage information of a first user equipment sent by the first user equipment;
a processor 1202, configured to determine, according to the network coverage information of the first user equipment and the network coverage information of the second user equipment, a transmission power when the second user equipment sends data to the first user equipment.
The implementation principle and technical effect of the second user equipment provided in the embodiment of the present invention are similar to those of the second user equipment provided in the above embodiment, and are not described herein again.
Optionally, the processor 1202 is specifically configured to:
determining mobile network coverage states of the first user equipment and the second user equipment according to the network coverage information of the first user equipment and the network coverage information of the second user equipment;
determining the transmitting power when the second user equipment sends data to the first user equipment according to the mobile network coverage states of the first user equipment and the second user equipment;
wherein the mobile network coverage status of the first user equipment and the second user equipment comprises any one of the following forms:
the first user equipment and the second user equipment are located in a mobile network coverage area;
neither the first user equipment nor the second user equipment is located in a mobile network coverage area;
the first user equipment is located in a mobile network coverage area, and the second user equipment is not located in the mobile network coverage area;
the first user equipment is not located in a mobile network coverage area, and the second user equipment is located in the mobile network coverage area.
Optionally, the processor 1202 is specifically configured to:
when the second user equipment determines that the first user equipment and the second user equipment are located in a mobile network coverage area and the first user equipment and the second user equipment are served by a first base station, the second user equipment transmits power adjustment information to the first base station, wherein the power adjustment information is used for instructing the first base station to adjust the transmission power and/or time-frequency resources of the first user equipment and the transmission power and/or time-frequency resources of the second user equipment;
and the second user equipment receives the power adjustment response information sent by the first base station, and determines the transmitting power when the second user equipment sends data to the first user equipment according to the power adjustment response information.
Optionally, the processor 1202 is specifically configured to:
when the second user equipment determines that the first user equipment and the second user equipment are located in a mobile network coverage area, the second user equipment is served by a second base station, and the first user equipment is served by a third base station, the second user equipment transmits power adjustment information to the second base station, wherein the power adjustment information is used for instructing the second base station to adjust the transmission power and/or time-frequency resources of the first user equipment and instructing the second base station to communicate with the third base station, so that the third base station adjusts the transmission power and/or time-frequency resources of the first user equipment;
and the second user equipment receives the power adjustment response information sent by the second base station, and determines the transmitting power when the second user equipment sends data to the first user equipment according to the power adjustment response information.
Optionally, the processor 1202 is specifically configured to:
and when the second user equipment determines that the first user equipment and the second user equipment are not located in a mobile network coverage area, the second user equipment determines the transmission power when sending data to the first user equipment according to the communication service type or the communication service mode.
Optionally, when the second user equipment determines that the first user equipment is not located in a mobile network coverage area and the second user equipment is located in a mobile network coverage area, the receiver 1201 is further configured to obtain a transmit power used by the first user equipment;
the processor 1202 is specifically configured to: determining the path loss when the first user equipment sends data to the second user equipment according to the transmitting power used by the first user equipment and the measured transmitting power of the first user equipment measured and obtained by the second user equipment;
determining the limited transmitting power of the second user equipment according to the path loss and the receiving sensitivity of the first user equipment;
and determining the transmitting power when the second user equipment transmits data to the first user equipment according to the limited transmitting power.
Optionally, the transmitter 1203 is further configured to:
transmitting the limited transmit power to a second base station, the second base station serving the second user equipment;
the receiver 1201 is further configured to: and receiving the transmission power sent by the second base station when the second user equipment sends data to the first user equipment.
Optionally, the transmitter 1203 is further configured to: sending the limited transmitting power and the limited time-frequency resource of the second user equipment to a second base station, wherein the second base station serves the second user equipment;
the receiver 1201 is further configured to: and receiving the transmitting power sent by the second base station when the second user equipment sends data to the first user equipment and the time-frequency resource configured for the second user equipment by the second base station.
Optionally, the processor 1202 is specifically configured to: determining the transmitting power which can be used by the current channel according to the current communication service;
and determining the transmitting power when the second user equipment transmits data to the first user equipment according to the transmitting power which can be used by the current channel and the limited transmitting power.
Optionally, the processor 1202 is further configured to:
acquiring available transmitting power on a channel corresponding to the second base station communication, transmitting power allowed by the second user equipment and the limited transmitting power, wherein the second base station serves the second user equipment;
and determining the transmission power when the second user equipment sends data to the second base station according to the transmission power which can be used on the channel corresponding to the communication of the second base station, the transmission power allowed by the second user equipment and the limited transmission power.
Optionally, when the second user equipment determines that the first user equipment is located in a mobile network coverage area and the second user equipment is not located in the mobile network coverage area, the transmitter 1203 is further configured to: transmitting power adjustment information or transmission resource adjustment information to the first user equipment;
the processor 1202 is specifically configured to: and determining the transmitting power when the second user equipment transmits data to the first user equipment according to the adjusted transmitting power or the adjusted transmitting resource of the first user equipment.
The implementation principle and technical effect of the second user equipment provided in the embodiment of the present invention are similar to those of the second user equipment provided in the above embodiment, and are not described herein again.
In the several embodiments provided in the present application, it should be understood that the disclosed apparatus, device and method may be implemented in other manners. For example, the above-described apparatus embodiments are merely illustrative, and for example, the division of the units or modules is only one logical division, and there may be other divisions when actually implemented, for example, a plurality of units or components may be combined or may be integrated into another system, or some features may be omitted, or not executed. In addition, the shown or discussed mutual coupling or direct coupling or communication connection may be an indirect coupling or communication connection through some interfaces, devices or units, and may be in an electrical, mechanical or other form.
The units described as separate parts may or may not be physically separate, and parts displayed as units may or may not be physical units, may be located in one place, or may be distributed on a plurality of network units. Some or all of the units can be selected according to actual needs to achieve the purpose of the solution of the embodiment.
Those of ordinary skill in the art will understand that: all or a portion of the steps of implementing the above-described method embodiments may be performed by hardware associated with program instructions. The program may be stored in a computer-readable storage medium. When executed, the program performs steps comprising the method embodiments described above; and the aforementioned storage medium includes: various media that can store program codes, such as ROM, RAM, magnetic or optical disks.
Finally, it should be noted that: the above embodiments are only used to illustrate the technical solution of the present invention, and not to limit the same; while the invention has been described in detail and with reference to the foregoing embodiments, it will be understood by those skilled in the art that: the technical solutions described in the foregoing embodiments may still be modified, or some or all of the technical features may be equivalently replaced; and the modifications or the substitutions do not make the essence of the corresponding technical solutions depart from the scope of the technical solutions of the embodiments of the present invention.

Claims (29)

1. A user equipment, the user equipment being a first user equipment, comprising:
the device comprises a determining module, a transmitting module and a receiving module, wherein the determining module is used for determining the transmitting power when the first user equipment transmits data to the second user equipment;
a data sending module, configured to send data to the second user equipment using the transmission power;
the user equipment further comprises: a request sending module, configured to send a power request message to a base station when the first user equipment is located in a coverage area of a mobile communication network, where the power request message includes channel usage information acquired by the first user equipment; the channel usage information includes one or more of: a fully available channel, a channel in an interfering state, and a channel used by emergency traffic, wherein the channel in the interfering state further includes a level of interference power.
2. The user equipment of claim 1, further comprising:
an information sending module, configured to send, to the second user equipment, the transmission power used by the first user equipment and/or the network coverage information of the first user equipment, so that the second user equipment determines the transmission power.
3. The user equipment of claim 1, further comprising:
a receiving module, configured to receive a power response message sent by the base station, where the power response message includes a transmission power of the first user equipment.
4. The user equipment of claim 3,
the determining module is further configured to determine, if the transmission power determined by the determining module is different from the transmission power determined by the base station, that the transmission power determined by the base station is the transmission power when data is sent to the second user equipment.
5. The user equipment of claim 1, wherein the determining module is specifically configured to: determining the transmitting power when the first user equipment transmits data to the second user equipment according to the communication service type;
the communication service types comprise public safety emergency services and non-public safety common services, the transmitting power corresponding to the public safety emergency services is a first transmitting power grade, the transmitting power corresponding to the non-public safety common services is a second transmitting power grade, and the first transmitting power grade is higher than the second transmitting power grade.
6. The UE of claim 5, wherein the non-public safety common traffic comprises common traffic of different QoS levels, wherein the second transmit power level comprises a plurality of second transmit power sub-levels, and wherein the second transmit power sub-level corresponding to the common traffic corresponds to QoS of the common traffic.
7. The user equipment of claim 1, wherein the determining module is specifically configured to: determining the transmitting power when the first user equipment transmits data to the second user equipment according to the communication service mode;
wherein the communication traffic mode comprises normal mode communication, fallback mode communication and interference mode communication.
8. The UE of claim 7, further comprising a determining module, configured to, before the determining module determines the transmission power for the first UE to transmit data to the second UE according to the communication traffic pattern,
determining an available channel for transmitting data to the second user equipment;
and judging whether the available channel is occupied, if not, determining that the communication service mode is the normal mode communication, if so, judging whether the channel running on the occupied channel is a public safety emergency service, if so, determining that the communication service mode is the yielding mode communication, and if not, determining that the communication service mode is the interference mode communication.
9. The user equipment of claim 8, wherein the determining module is specifically configured to:
under the normal mode communication, determining the transmitting power when transmitting data to the second user equipment according to the communication service type, and transmitting the data to the second user equipment on an unoccupied available channel; or
Determining that the transmission power when transmitting data to the second user equipment is lower than the transmission power when the first user equipment transmits data to the second user equipment when performing public safety emergency service in the fallback mode communication; or
And under the interference mode communication, determining the transmission power when transmitting data to the second user equipment according to the interference condition of the available channel.
10. A user equipment, the user equipment being a second user equipment, comprising:
the receiving module is used for receiving the network coverage information of the first user equipment, which is sent by the first user equipment;
a determining module, configured to determine, according to the network coverage information of the first user equipment and the network coverage information of the second user equipment, a transmission power when the second user equipment sends data to the first user equipment;
the determining module includes:
a state determining unit, configured to determine mobile network coverage states of the first user equipment and the second user equipment according to network coverage information of the first user equipment and network coverage information of the second user equipment;
a power determining unit, configured to determine, according to mobile network coverage states of the first user equipment and the second user equipment, a transmission power when the second user equipment sends data to the first user equipment;
wherein the mobile network coverage status of the first user equipment and the second user equipment comprises any one of the following forms:
the first user equipment and the second user equipment are located in a mobile network coverage area;
neither the first user equipment nor the second user equipment is located in a mobile network coverage area;
the first user equipment is located in a mobile network coverage area, and the second user equipment is not located in the mobile network coverage area;
the first user equipment is not located in a mobile network coverage area, and the second user equipment is located in the mobile network coverage area;
wherein,
when the state determining unit determines that the first user equipment and the second user equipment are located in a mobile network coverage area and the first user equipment and the second user equipment are served by a first base station, the power determining unit is specifically configured to:
transmitting power adjustment information to the first base station, wherein the power adjustment information is used for instructing the first base station to adjust the transmission power and/or time-frequency resources of the first user equipment and the transmission power and/or time-frequency resources of the second user equipment;
receiving power adjustment response information sent by the first base station, and determining the transmitting power when the second user equipment sends data to the first user equipment according to the power adjustment response information;
or,
when the state determining unit determines that the first user equipment and the second user equipment are located in a mobile network coverage area, the second user equipment is served by a second base station, and the first user equipment is served by a third base station, the power determining unit is specifically configured to:
transmitting power adjustment information to the second base station, wherein the power adjustment information is used for indicating the second base station to communicate with the third base station, so that the third base station adjusts the transmission power and/or the time-frequency resource of the first user equipment;
receiving power adjustment response information sent by the second base station, and determining the transmitting power when the second user equipment sends data to the first user equipment according to the power adjustment response information;
or,
when the state determining unit determines that neither the first user equipment nor the second user equipment is located in a mobile network coverage area, the power determining unit is specifically configured to:
determining the transmitting power when transmitting data to the first user equipment according to the communication service type or the communication service mode;
or,
when the state determining unit determines that the first user equipment is not located in a coverage area of a mobile network and the second user equipment is located in the coverage area of the mobile network, the power determining unit is specifically configured to:
acquiring the transmitting power used by the first user equipment;
determining the path loss when the first user equipment sends data to the second user equipment according to the transmitting power used by the first user equipment and the measured transmitting power of the first user equipment measured and obtained by the second user equipment;
determining the limited transmitting power of the second user equipment according to the path loss and the receiving sensitivity of the first user equipment;
determining the transmitting power when the second user equipment transmits data to the first user equipment according to the limited transmitting power;
or,
when the state determining unit determines that the first user equipment is located in a coverage area of a mobile network and the second user equipment is not located in the coverage area of the mobile network, the power determining unit is specifically configured to:
transmitting power adjustment information or transmission resource adjustment information to the first user equipment;
and determining the transmitting power when the second user equipment transmits data to the first user equipment according to the adjusted transmitting power or the adjusted transmitting resource of the first user equipment.
11. The UE of claim 10, wherein the power determining unit is further specifically configured to:
transmitting the limited transmit power to a second base station, the second base station serving the second user equipment;
and receiving the transmission power sent by the second base station when the second user equipment sends data to the first user equipment.
12. The UE of claim 10, wherein the power determining unit is further specifically configured to:
sending the limited transmitting power and the limited time-frequency resource of the second user equipment to a second base station, wherein the second base station serves the second user equipment;
and receiving the transmitting power sent by the second base station when the second user equipment sends data to the first user equipment and the time-frequency resource configured for the second user equipment by the second base station.
13. The UE of claim 10, wherein the power determining unit is further specifically configured to:
determining the transmitting power which can be used by the current channel according to the current communication service;
and determining the transmitting power when the second user equipment transmits data to the first user equipment according to the transmitting power which can be used by the current channel and the limited transmitting power.
14. The ue according to any one of claims 10 to 13, wherein when the status determining unit determines that the first ue is not located in a mobile network coverage area and the second ue is located in a mobile network coverage area, the power determining unit is further configured to:
acquiring available transmitting power on a channel corresponding to communication with a second base station, transmitting power allowed by the second user equipment and the limited transmitting power, wherein the second base station serves the second user equipment;
and determining the transmission power when the second user equipment sends data to the second base station according to the transmission power which can be used on the channel corresponding to the communication of the second base station, the transmission power allowed by the second user equipment and the limited transmission power.
15. A method of transmit power control, comprising:
the method comprises the steps that the first user equipment determines the transmitting power when the first user equipment transmits data to the second user equipment;
the first user equipment transmits data to the second user equipment by using the transmission power;
the transmission power control method further includes:
when the first user equipment is located in a coverage area of a mobile communication network, the first user equipment sends a power request message to a base station, wherein the power request message comprises channel use information acquired by the first user equipment; the channel usage information includes one or more of: a fully available channel, a channel in an interfering state, and a channel used by emergency traffic, wherein the channel in the interfering state further includes a level of interference power.
16. The method of claim 15, further comprising;
the first user equipment sends the transmission power used by the first user equipment and/or the network coverage information of the first user equipment to the second user equipment so as to enable the second user equipment to determine the transmission power.
17. The method of claim 15, wherein the transmit power control method further comprises:
and the first user equipment receives a power response message sent by the base station, wherein the power response message comprises the transmission power of the first user equipment.
18. The method of claim 17, wherein the transmit power control method further comprises:
if the first user equipment determines that the transmission power determined by the first user equipment is different from the transmission power determined by the base station, the first user equipment determines that the transmission power determined by the base station is the transmission power when data is sent to the second user equipment.
19. The method of claim 15, wherein the determining, by the first user equipment, a transmission power at which the first user equipment transmits data to the second user equipment comprises:
the first user equipment determines the transmitting power when the first user equipment transmits data to the second user equipment according to the communication service type;
the communication service types comprise public safety emergency services and non-public safety common services, the transmitting power corresponding to the public safety emergency services is a first transmitting power grade, the transmitting power corresponding to the non-public safety common services is a second transmitting power grade, and the first transmitting power grade is higher than the second transmitting power grade.
20. The method of claim 19, wherein the non-public safety general traffic comprises general traffic of different quality of service levels, wherein the second transmission power level comprises a plurality of second transmission power sub-levels, and wherein the second transmission power sub-levels corresponding to the general traffic correspond to the quality of service of the general traffic.
21. The method of claim 15, wherein the determining, by the first user equipment, a transmission power at which the first user equipment transmits data to the second user equipment comprises:
the first user equipment determines the transmitting power when the first user equipment transmits data to the second user equipment according to the communication service mode;
wherein the communication traffic mode comprises normal mode communication, fallback mode communication and interference mode communication.
22. The method of claim 21, wherein before the first ue determines the transmit power for the first ue to transmit data to the second ue according to the communication traffic pattern, further comprising:
the first user equipment determines an available channel for transmitting data to second user equipment;
the first user equipment judges whether the available channel is occupied, if not, the first user equipment determines that the communication service mode is the normal mode communication, if so, the first user equipment judges whether the channel which is occupied runs public safety emergency service, if so, the first user equipment determines that the communication service mode is the deferral mode communication, and if not, the first user equipment determines that the communication service mode is the interference mode communication.
23. The method of claim 22, wherein the determining, by the first user equipment, the transmission power for the first user equipment to transmit data to the second user equipment according to the communication traffic pattern comprises:
under the normal mode communication, the first user equipment determines the transmitting power when transmitting data to the second user equipment according to the communication service type, and transmits the data to the second user equipment on an unoccupied available channel; or
In the fallback mode communication, the first user equipment determines that the transmission power when transmitting data to the second user equipment is lower than the transmission power when the first user equipment transmits data to the second user equipment when performing public safety emergency service; or
And under the interference mode communication, the first user equipment determines the transmission power when transmitting data to the second user equipment according to the interference condition of the available channel.
24. The method according to any one of claims 15 to 23, wherein when the first user equipment is located in a coverage area of a mobile communication network, the first user equipment sends a power request message to a base station, where the power request message includes channel usage information acquired by the first user equipment, so that the base station determines the transmission power of the first user equipment according to the channel usage information;
the first user equipment receives a power response message sent by the base station, wherein the power response message comprises the transmission power of the first user equipment;
if the first user equipment determines that the transmission power determined by the first user equipment is different from the transmission power determined by the base station, the first user equipment determines that the transmission power determined by the base station is the transmission power when data is sent to the second user equipment.
25. A method of transmit power control, comprising:
the method comprises the steps that a second user device receives network coverage information of a first user device, wherein the network coverage information is sent by the first user device;
the second user equipment determines the transmitting power when the second user equipment sends data to the first user equipment according to the network coverage information of the first user equipment and the network coverage information of the second user equipment;
the second user equipment determines the transmission power when the second user equipment sends data to the first user equipment according to the network coverage information of the first user equipment and the network coverage information of the second user equipment, and the method comprises the following steps:
the second user equipment determines the mobile network coverage states of the first user equipment and the second user equipment according to the network coverage information of the first user equipment and the network coverage information of the second user equipment;
the second user equipment determines the transmitting power when the second user equipment sends data to the first user equipment according to the mobile network coverage states of the first user equipment and the second user equipment;
wherein the mobile network coverage status of the first user equipment and the second user equipment comprises any one of the following forms:
the first user equipment and the second user equipment are located in a mobile network coverage area;
neither the first user equipment nor the second user equipment is located in a mobile network coverage area;
the first user equipment is located in a mobile network coverage area, and the second user equipment is not located in the mobile network coverage area;
the first user equipment is not located in a mobile network coverage area, and the second user equipment is located in the mobile network coverage area;
wherein,
the second user equipment determines the transmission power when the second user equipment sends data to the first user equipment according to the mobile network coverage states of the first user equipment and the second user equipment, and the method comprises the following steps:
when the second user equipment determines that the first user equipment and the second user equipment are located in a mobile network coverage area and the first user equipment and the second user equipment are served by a first base station, the second user equipment transmits power adjustment information to the first base station, wherein the power adjustment information is used for instructing the first base station to adjust the transmission power and/or time-frequency resources of the first user equipment and the transmission power and/or time-frequency resources of the second user equipment;
the second user equipment receives power adjustment response information sent by the first base station, and determines the transmitting power when the second user equipment sends data to the first user equipment according to the power adjustment response information;
or,
the second user equipment determines the transmission power when the second user equipment sends data to the first user equipment according to the mobile network coverage states of the first user equipment and the second user equipment, and the method comprises the following steps:
when the second user equipment determines that the first user equipment and the second user equipment are located in a mobile network coverage area, the second user equipment is served by a second base station, and the first user equipment is served by a third base station, the second user equipment transmits power adjustment information to the second base station, wherein the power adjustment information is used for instructing the second base station to communicate with the third base station, so that the third base station adjusts the transmission power and/or time-frequency resources of the first user equipment;
the second user equipment receives power adjustment response information sent by the second base station, and determines the transmitting power when the second user equipment sends data to the first user equipment according to the power adjustment response information;
or,
the second user equipment determines the transmission power when the second user equipment sends data to the first user equipment according to the mobile network coverage states of the first user equipment and the second user equipment, and the method comprises the following steps:
when the second user equipment determines that the first user equipment and the second user equipment are not located in a mobile network coverage area, the second user equipment determines the transmission power when sending data to the first user equipment according to the communication service type or the communication service mode;
or,
the second user equipment determines the transmission power when the second user equipment sends data to the first user equipment according to the mobile network coverage states of the first user equipment and the second user equipment, and the method comprises the following steps:
when the second user equipment determines that the first user equipment is not located in a mobile network coverage area and the second user equipment is located in the mobile network coverage area, the second user equipment acquires the transmitting power used by the first user equipment;
the second user equipment determines the path loss when the first user equipment sends data to the second user equipment according to the transmitting power used by the first user equipment and the measured transmitting power of the first user equipment obtained by the measurement of the second user equipment;
the second user equipment determines the limited transmitting power of the second user equipment according to the path loss and the receiving sensitivity of the first user equipment;
and the second user equipment determines the transmitting power when the second user equipment transmits data to the first user equipment according to the limited transmitting power.
26. The method of claim 25, wherein the determining, by the second user equipment, the transmission power for the second user equipment to transmit data to the first user equipment according to the limited transmission power comprises:
the second user equipment sends the limited transmitting power to a second base station, and the second base station serves the second user equipment;
and the second user equipment receives the transmission power which is sent by the second base station and is used when the second user equipment sends data to the first user equipment.
27. The method of claim 26, wherein the determining, by the second user equipment, the transmission power for the second user equipment to transmit data to the first user equipment according to the limited transmission power comprises:
the second user equipment sends the limited transmitting power and the limited time-frequency resource of the second user equipment to a second base station, and the second base station serves the second user equipment;
and the second user equipment receives the transmitting power sent by the second base station when the second user equipment sends data to the first user equipment and the time-frequency resource configured for the second user equipment by the second base station.
28. The method of claim 26, wherein the determining, by the second user equipment, the transmission power for the second user equipment to transmit data to the first user equipment according to the limited transmission power comprises:
the second user equipment determines the transmitting power which can be used by the current channel according to the current communication service;
and the second user equipment determines the transmitting power when the second user equipment sends data to the first user equipment according to the transmitting power which can be used by the current channel and the limited transmitting power.
29. The method according to any of claims 25 to 28, wherein the first user equipment is not located in a mobile network coverage area, and wherein the second user equipment is located in a mobile network coverage area, the method further comprising:
the second user equipment acquires available transmission power on a channel corresponding to communication with a second base station, the transmission power allowed by the second user equipment and the limited transmission power, and the second base station serves the second user equipment;
and the second user equipment determines the transmission power when the second user equipment sends data to the second base station according to the available transmission power on the channel corresponding to the communication with the second base station, the transmission power allowed by the second user equipment and the limited transmission power.
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