WO2019206327A1

WO2019206327A1 - Method and apparatus for indicating transmission power

Info

Publication number: WO2019206327A1
Application number: PCT/CN2019/084777
Authority: WO
Inventors: 曾勇波; 才宇; 王键
Original assignee: 华为技术有限公司
Priority date: 2018-04-28
Filing date: 2019-04-28
Publication date: 2019-10-31
Also published as: CN110418312A; CN110418312B

Abstract

The present application provides a method and an apparatus for indicating a transmission power, enabling a remote apparatus to acquire a transmission power of a discovery signal by means of transmission power indication information sent by a relay apparatus, such that the transmission power is used to estimate path loss, realizing power control. The method of an embodiment of the present application comprises: a relay apparatus generating transmission power indication information of a discovery signal; and the relay apparatus sending the transmission power indication information to a remote apparatus, such that the remote apparatus acquires the transmission power of the discovery signal according to the transmission power indication information.

Description

Method and device for indicating transmission power

Technical field

The present application relates to the field of communications, and in particular, to a method and an apparatus for indicating transmit power.

Background technique

Device to Device (D2D) technology defined by R12 (Release 12, 12th Edition) and R13 (Release 13, 13th Edition) of the 3rd Generation Partnership Project (3GPP) is used for equipment The technology of direct communication with devices, the two devices can directly send messages and corresponding control information without passing through the base station. The D2D of R12/R13 is mainly for public security applications, and broadcasting and multicast are the main communication methods. A typical application scenario is that a terminal directly transmits and receives information through a bypass link (or a direct link) between a terminal and a terminal. R15 (Release 15, 15th Edition) initiated the research on the evolution of D2D (Further enhancement on D2D, FeD2D). The typical application scenario is the UE-to-Network Relay (UE-to-Network Relay) scenario. Data and control information between a relay base station (eNB) and a remote terminal (Remote UE). One of the main purposes of the UE-to-Network Relay scenario is to reduce the power consumption of the Remote UE. Power control is an important method. The primary problem of power control is the need to accurately estimate the path loss, which in turn requires the indication of the reference signal. power.

The current scheme is also in the Sidelink technology of R12-R14. If the UE is in the coverage of the eNB, the transmit power of the Sidelink signal transmitted by the UE is determined according to the downlink propagation path loss between the UE and the eNB, and the power control parameter is determined. Obtained from the eNB; if the UE is outside the coverage of the eNB, the UE may transmit the Sidelink signal using the standard predefined maximum transmit power.

However, in the current Sidelink technology, the Sidelink signal is broadcasted in a broadcast manner, and there is no explicit receiving end, and the purpose of the power control is to avoid interference to the cellular uplink signal or to avoid exceeding the maximum transmission power of the terminal, and thus cannot indicate the transmission of the Sidelink signal. The power is such that the receiving end cannot estimate the propagation path loss between the transmitting end and the receiving end. Therefore, the power control of the Sidelink signal in the UE-to-Network Relay scenario cannot be implemented.

Summary of the invention

The present application provides a method and a device for indicating a transmit power, which are used by a remote device to obtain a transmit power of a discovery signal by using a transmit power indication information sent by a relay device, thereby estimating a path loss by using the transmit power, thereby implementing power control.

A first aspect of the present application provides a method for indicating a transmit power, including: a relay device generates transmit power indication information according to a transmit power of a discovery signal; and the relay device sends the transmit power indication information to the remote device, so that the remote device The transmit power indication information acquires the transmit power of the discovery signal. The relay device sends the transmit power indication information indicating the transmit power of the discovery signal to the remote device, and the remote device can obtain the transmit power of the discovery signal by using the transmit power indication information, and then when the remote device receives the discovery signal, The transmission power of the relay device when transmitting the discovery signal can be subtracted from the received signal strength when the remote device receives the discovery signal, and the propagation path loss between the remote device and the relay device can be obtained, thereby implementing the UE-to-Network Relay. Power control under the scene.

With reference to the first aspect of the present application, in a first possible implementation manner, the transmit power indication information is represented by a mask of the demodulation reference signal, and the relay device generates the transmit power indication information according to the transmit power of the discovery signal, including: the relay device Obtaining a transmit power of the discovery signal; the relay device determines a mask sequence corresponding to the transmit power according to the preset mapping table, where the preset mapping table includes a mapping relationship between the at least one transmit power and the one-to-one correspondence of the at least one mask sequence; The device generates a demodulation reference signal of the discovery signal according to the mask sequence. In the scenario of the UE-to-Network Relay, the relay device and the remote device can directly send messages and corresponding control information without passing through the base station. The defined PSDCH is used for the relay device to broadcast the discovery signal, and the discovery signal can also be used. The discovery message, considering the scenario of a remote terminal supporting one PRB bandwidth, the bandwidth of the discovery signal needs to be reduced from the current two PRBs to one PRB, and the content of the signal of the discovery signal is unchanged. In order to keep the code rate unchanged, the discovery signal needs to be extended from the current one subframe to two subframes, and when the relay device generates the discovery signal, the transmission power of the transmission discovery signal is already configured. After the discovery signal is spread in the time domain, the DMRS symbol is increased, and the orthogonal power mask on the added DMRS symbol is used to indicate the transmit power of the discovery signal. The orthogonal mask of the DMRS is multiplied by one in the frequency domain sequence of each DMRS symbol. The value (1 or -1), the mask sequence of the orthogonal mask of the two DMRS symbols can be (1, 1) and (1, -1), and the orthogonal mask is originally used to reduce the interference between the DMRS signals. However, in the relay scenario, the relay device can self-schedule the resources used by the discovery signal, and the remote device cannot be used. Therefore, the manner of reducing the interference by the randomized orthogonal mask does not mean in the relay scenario. Large, so these orthogonal masks can be used to carry a limited number of power indications. Then, the mask sequence corresponding to the transmission power is determined by the preset mapping table, and the demodulation reference signal of the discovery signal is generated according to the mask sequence.

With reference to the first possible implementation manner of the first aspect of the present application, in a second possible implementation manner, the relay device sends the transmit power indication information to the remote device, including: the relay device includes the discovery of the demodulation reference signal The signal is sent to the remote device. After the relay device generates the demodulation reference signal of the discovery signal according to the mask sequence, the relay device transmits the discovery signal to the remote device through the PSDCH.

With reference to the first aspect of the present application, in a third possible implementation manner, the transmit power indication information includes reference power information and a power offset value represented by a mask of the demodulation reference signal, and the relay device generates the transmit power according to the discovery signal. Transmit power indication information, including: a reference transmission power and a power offset value of the discovery signal determined by the relay device, where the power offset value is a power offset generated on the basis of the reference transmit power when the relay device transmits the discovery signal; Generating reference power information in the bypass master information block according to the reference transmit power; the relay device determines a mask sequence corresponding to the power offset value according to the preset mapping table, where the preset mapping table includes at least one power offset value and at least one a one-to-one mapping relationship of the mask sequences; the relay device generates a demodulation reference signal of the discovery signal according to the mask sequence.

With reference to the third possible implementation manner of the first aspect of the present application, in a fourth possible implementation manner, the relay device sends the transmit power indication information to the remote device, including: the relay device includes a reference power information bypass The master information block and the discovery signal including the demodulation reference signal are transmitted to the remote device. The relay device sends the bypass master information block including the reference power information to the remote device through the PSBCH, and sends the discovery signal including the demodulation reference signal to the remote device through the PSDCH, and the remote device obtains the bypass through the PSBCH and the PSDCH respectively. Master information block and discovery signal.

A second aspect of the present application provides a method for indicating a transmit power, including: receiving, by a remote device, transmit power indication information sent by a relay device, where the transmit power indication information is used to indicate a transmit power of the discovery signal; and the remote device is configured according to the transmit power The information obtains the transmit power of the discovery signal. The remote device receives the transmit power indication information sent by the relay device for indicating the discovery signal, and acquires the transmit power of the discovery signal according to the transmit power indication information, and when the discovery signal is received, the relay device can send the discovery signal. The transmit power is subtracted from the received signal strength when the remote device receives the discovery signal, and the propagation path loss between the remote device and the relay device is obtained, so that the power control in the UE-to-Network Relay scenario can be implemented.

With reference to the second aspect of the present application, in a first possible implementation, the transmit power indication information is represented by a mask of the demodulation reference signal, and the remote device receives the transmit power indication information sent by the relay device, including: receiving by the remote device The discovery signal sent by the relay device; the remote device parses the discovery signal to obtain a mask of the demodulation reference signal. If the transmit power indication information is represented by a mask of the demodulation reference signal, after the remote device receives the discovery signal transmitted by the relay device, the resolution discovery signal obtains a mask of the demodulation reference signal.

With reference to the first possible implementation manner of the second aspect of the present application, in a second possible implementation manner, the remote device obtains the transmit power of the discovery signal according to the transmit power indication information, including: masking the demodulation reference signal by the remote device The code obtains a mask sequence; the remote device determines the transmit power of the discovery signal according to the preset mapping table and the mask sequence, and the preset mapping table includes a one-to-one mapping relationship between the at least one transmit power and the at least one mask sequence. The remote device obtains a mask sequence according to a mask of the demodulation reference signal, and determines a transmit power of the discovery signal according to the preset mapping table and the mask sequence, where the preset mapping table includes at least one transmit power and at least one mask sequence. A corresponding mapping relationship, and the relay device is the same as the preset mapping table used by the remote device.

With reference to the second aspect of the present application, in a third possible implementation, the transmit power indication information includes reference power information and a demodulation reference signal, and the remote device receives the transmit power indication information sent by the relay device, including: receiving by the remote device The discovery signal sent by the relay device and the bypass main information block; the remote device parses the discovery signal to obtain a demodulation reference signal, and parses the bypass main information block to obtain reference power information. If the power indication information includes the reference power information and the demodulation reference signal, the remote device receives the discovery signal sent by the relay device and bypasses the main information block, and then parses the discovery signal to obtain a mask of the demodulation reference signal, and resolves the bypass master. The information block gets the reference power information.

With reference to the third possible implementation manner of the second aspect of the present application, in a fourth possible implementation, the remote device obtains the transmit power of the discovery signal according to the transmit power indication information, including: determining, by the remote device, the discovery signal according to the reference power information Reference transmit power; the remote device obtains a mask sequence according to a mask of the demodulation reference signal; the remote device determines a power offset value of the discovery signal according to the preset mapping table and the mask sequence, and the preset mapping table includes at least one power a one-to-one mapping relationship between the offset value and the at least one mask sequence; the remote device calculates the transmit power of the discovery signal according to the reference transmit power and the power offset value. The remote device determines the reference transmit power of the discovery signal according to the reference power information, obtains a mask sequence according to the mask of the demodulation reference signal, and determines a power offset value of the discovery signal according to the preset mapping table and the mask sequence, and the preset mapping table And including a mapping relationship between the at least one power offset value and the one-to-one correspondence of the at least one mask sequence, and calculating the transmit power of the discovery signal according to the reference transmit power and the power offset value.

The third aspect of the present application provides a relay device, including: a processing module, configured to generate transmit power indication information of a discovery signal, and a sending module, configured to send, to the remote device, the remote device according to the transmitting The power indication information acquires the transmission power of the discovery signal. The sending module sends the transmit power indication information generated by the processing module to indicate the transmit power of the discovery signal to the remote device, and the remote device can obtain the transmit power of the discovery signal by using the transmit power indication information, and then the remote device receives the discovery. When the signal is received, the transmission power of the relay device when transmitting the discovery signal can be subtracted from the received signal strength when the remote device receives the discovery signal, thereby obtaining the propagation path loss between the remote device and the relay device, thereby implementing UE-to - Power control in the Network Relay scenario.

With reference to the third aspect of the present application, in a first possible implementation manner, the transmit power indication information is represented by a mask of a demodulation reference signal, and the processing module is specifically configured to determine a transmit power of the discovery signal; the processing module is further configured to The preset mapping table determines a mask sequence corresponding to the transmit power, where the preset mapping table includes a one-to-one mapping relationship between the at least one transmit power and the at least one mask sequence; the processing module is further configured to generate the discovery signal according to the mask sequence Demodulation reference signal. In the scenario of the UE-to-Network Relay, the relay device and the remote device can directly send messages and corresponding control information without passing through the base station. The defined PSDCH is used for the relay device to broadcast the discovery signal, and the discovery signal can also be used. The discovery message, considering the scenario of a remote terminal (Remote UE) supporting one PRB bandwidth, the bandwidth of the discovery signal needs to be reduced from the current 2 PRBs to 1 PRB, and the message content of the discovery signal remains unchanged. In the case of maintaining the code rate, the discovery signal needs to be extended from the current one subframe to two subframes, and when the relay device generates the discovery signal, the transmission power of the transmission discovery signal is already configured. After the discovery signal is spread in the time domain, the DMRS symbol is increased, and the orthogonal power mask on the added DMRS symbol is used to indicate the transmit power of the discovery signal. The orthogonal mask of the DMRS is multiplied by one in the frequency domain sequence of each DMRS symbol. The value (1 or -1), the mask sequence of the orthogonal mask of the two DMRS symbols can be (1, 1) and (1, -1), and the orthogonal mask is originally used to reduce the interference between the DMRS signals. However, in the relay scenario, the relay device can self-schedule the resources used by the discovery signal, and the remote device cannot be used. Therefore, the manner of reducing the interference by the randomized orthogonal mask does not mean in the relay scenario. Large, so these orthogonal masks can be used to carry a limited number of power indications. Then, the processing module determines a mask sequence corresponding to the transmit power by using a preset mapping table, and the processing module generates a demodulation reference signal of the discovery signal according to the mask sequence.

With reference to the first possible implementation manner of the third aspect of the present application, in a second possible implementation, the sending module is specifically configured to send the discovery signal including the demodulation reference signal to the remote device. After the processing module generates the demodulation reference signal of the discovery signal according to the mask sequence, the transmitting module sends the discovery signal to the remote device through the PSDCH.

With reference to the third aspect of the present application, in a third possible implementation manner, the transmit power indication information includes reference power information and a power offset value represented by a mask of the demodulation reference signal, and the processing module is specifically configured to determine the discovery signal. Referring to a transmit power and a power offset value, where the power offset is a power offset generated by the reference device based on the reference transmit power when the discovery signal is transmitted; the processing module is further configured to generate the bypass master information block according to the reference transmit power The reference module is further configured to determine, according to the preset mapping table, a mask sequence corresponding to the power offset value, where the preset mapping table includes at least one power offset value corresponding to the one-to-one correspondence of the at least one mask sequence. a mapping relationship; the processing module is further configured to generate a demodulation reference signal of the discovery signal according to the mask sequence. When the processing module generates the discovery signal, the reference transmit power of the transmit discovery signal is already configured, but when the discovery signal is actually sent, a power offset may be generated based on the reference transmit power, and the amount of the power offset is generated by the power offset value. Said. The processing module uses the field of one information field in the MIB-SL to represent the reference power information, and the processing module determines a mask sequence corresponding to the power offset value according to the preset mapping table, and generates a demodulation reference signal of the discovery signal according to the mask sequence. .

With reference to the third possible implementation manner of the third aspect of the present application, in a fourth possible implementation, the sending module is specifically configured to send a bypass main information block including reference power information and a discovery signal including a demodulation reference signal. To the remote device. The sending module sends the bypass master information block including the reference power information to the remote device through the PSBCH, and sends the discovery signal including the demodulation reference signal to the remote device through the PSDCH, and the remote device acquires the bypass master through the PSBCH and the PSDCH respectively. Information block and discovery signal.

The fourth aspect of the present application provides a remote device, including: a receiving module, configured to receive transmit power indication information sent by a relay device, where transmit power indication information is used to indicate a transmit power of a discovery signal, and a processing module, configured to transmit according to the transmit The power indication information gets the transmit power of the discovery signal. The receiving module receives the transmit power indication information that is sent by the relay device to indicate the discovery signal, and the processing module acquires the transmit power of the discovery signal according to the transmit power indication information, and then the relay device can send the discovery when the receiving module receives the discovery signal. The transmit power of the signal is subtracted from the received signal strength when the receiving module receives the discovery signal, and the propagation path loss between the remote device and the relay device is obtained, thereby implementing power control in the UE-to-Network Relay scenario.

With reference to the fourth aspect of the present application, in a first possible implementation, the transmit power indication information is represented by a mask of the demodulation reference signal, and the receiving module is specifically configured to receive the discovery signal sent by the relay device; the processing module is further used A mask for demodulating the reference signal is obtained by parsing the discovery signal. If the power indication information is represented by a mask of the demodulation reference signal, after the receiving module receives the discovery signal transmitted by the relay device, the processing module parses the discovery signal to obtain a mask of the demodulation reference signal.

With reference to the first possible implementation manner of the fourth aspect of the present application, in a second possible implementation, the processing module is further configured to obtain a mask sequence according to a mask of the demodulation reference signal; and the processing module is further configured to The mapping table and the mask sequence determine the transmit power of the discovery signal, and the preset mapping table includes a one-to-one mapping relationship between the at least one transmit power and the at least one mask sequence. The processing module obtains a mask sequence according to a mask of the demodulation reference signal, and determines a transmit power of the discovery signal according to the preset mapping table and the mask sequence, where the preset mapping table includes at least one transmit power and at least one mask sequence. Corresponding mapping relationship, and the relay device is the same as the preset mapping table used by the processing module.

With reference to the fourth aspect of the present application, in a third possible implementation, the transmit power indication information includes reference power information and a power offset value represented by a mask of the demodulation reference signal, and the receiving module is specifically configured to receive the relay device. The discovery signal and the bypass main information block are sent; the processing module is further configured to parse the discovery signal to obtain a mask of the demodulation reference signal, and parse the bypass main information block to obtain reference power information. If the power indication information includes the reference power information and the mask of the demodulation reference signal, after the receiving module receives the discovery signal sent by the relay device and bypasses the main information block, the processing module parses the discovery signal to obtain a mask of the demodulation reference signal. The bypass master information block is parsed to obtain reference power information.

With reference to the third possible implementation manner of the fourth aspect of the present application, in a fourth possible implementation, the processing module is further configured to determine a reference transmit power of the discovery signal according to the reference power information, and the processing module is further configured to perform demodulation The mask of the reference signal is used to obtain a mask sequence; the processing module is further configured to determine a power offset value of the discovery signal according to the preset mapping table and the mask sequence, where the preset mapping table includes at least one power offset value and at least one mask a one-to-one mapping relationship of the sequence; the processing module is further configured to calculate a transmit power of the discovery signal according to the reference transmit power and the power offset value. The processing module determines the reference transmit power of the discovery signal according to the reference power information, obtains a mask sequence according to the mask of the demodulation reference signal, and determines a power offset value of the discovery signal according to the preset mapping table and the mask sequence, where the preset mapping table includes And mapping the at least one power offset value to the one-to-one correspondence of the at least one mask sequence, and calculating the transmit power of the discovery signal according to the reference transmit power and the power offset value.

A fifth aspect of the present application provides a relay device, including: a transceiver and at least one processor, the transceiver and the at least one processor are interconnected by a line, and the transceiver is used to perform the implementation in any of the first aspects, in the relay The operation of transmitting and receiving information on the device side;

At least one processor performs an information processing or control operation on the relay device side in any of the implementations of the first aspect.

A remote device of the sixth aspect of the present application, comprising: a transceiver and at least one processor, the transceiver and the at least one processor are interconnected by a line, and the transceiver is configured to perform the implementation of the second aspect, at the remote device The side performs information transmission and reception operations;

At least one processor performs information processing or control operations performed on the relay device side in any of the implementations of the second aspect.

A seventh aspect of the present application provides a computer readable storage medium, which is applied to a relay device, where instructions are stored in a computer readable storage medium, and when executed on a computer, cause the computer to execute any of the foregoing implementation manners of the first aspect The operation of the relay device.

An eighth aspect of the present application provides a computer readable storage medium, which is applied to a relay device, where instructions are stored in a computer readable storage medium, and when executed on a computer, cause the computer to execute any of the foregoing second aspects The operation of the remote device.

DRAWINGS

In order to more clearly illustrate the technical solutions of the embodiments of the present application, the drawings used in the embodiments and the prior art description will be briefly described below.

1 is a schematic diagram of an architecture of a two-way relay mode;

2 is a schematic diagram of an architecture of a one-way relay mode;

3 is a schematic flowchart diagram of an embodiment of a method for indicating a transmit power provided by the present application;

4 is a schematic flowchart diagram of another embodiment of a method for indicating a transmit power provided by the present application;

5 is a schematic diagram of a mask of a demodulation reference signal using all mask sequences provided by the present application;

6 is a schematic diagram of a mask of a demodulation reference signal using a partial mask sequence provided by the present application;

FIG. 7 is a schematic flowchart diagram of still another embodiment of a method for indicating a transmit power provided by the present application;

FIG. 8 is a schematic structural diagram of an embodiment of a relay device provided by the present application;

9 is a schematic structural diagram of an embodiment of a remote device provided by the present application;

FIG. 10 is a schematic structural diagram of another embodiment of a relay device provided by the present application.

detailed description

The terms "upstream" and "downstream" appearing in this application are used in some scenarios to describe the direction of data/information transmission. For example, the "upstream" direction is the direction in which the data/information is transmitted from the terminal device to the network side, " The downlink direction is the direction in which the data/information is transmitted from the network side device to the terminal device, and the “upstream” and “downlink” are only used to describe the direction, and specific devices for starting and ending the data/information are not limited.

The term "and/or" appearing in the present application may be an association relationship describing an associated object, indicating that there may be three relationships, for example, A and/or B, which may indicate that A exists separately, and A and B exist simultaneously. There are three cases of B alone. In addition, the character "/" in the present application generally indicates that the context of the context is an "or" relationship.

Various objects such as various messages/information/device/network elements/systems/devices/actions/operations/processes/concepts may be named in this application, but these specific names do not constitute related objects. The definition may be changed according to factors such as scene, context or usage habits. The understanding of the technical meaning of the relevant object should be determined mainly from the functions and technical effects embodied/executed in the technical solution.

The terms "first", "second" and the like in the specification and claims of the present application and the above-mentioned drawings are used to distinguish similar objects, and are not necessarily used to describe a particular order or order. It is to be understood that the data so used may be interchanged where appropriate so that the embodiments described herein can be implemented in a sequence other than what is illustrated or described herein. In addition, the terms "comprises" and "comprises" and "the" and "the" are intended to cover a non-exclusive inclusion, for example, a process, method, system, product, or device that comprises a series of steps or modules is not necessarily limited to Those steps or modules may include other steps or modules not explicitly listed or inherent to such processes, methods, products or devices. The naming or numbering of the steps appearing in this application does not mean that the steps in the method flow must be performed in the time/logical order indicated by the naming or numbering. The process steps that have been named or numbered can be implemented according to the The technical purpose changes the execution order as long as the same or similar technical effects can be achieved. The division of modules appearing in this application is a logical division. In actual applications, there may be another division manner. For example, multiple modules may be combined or integrated into another system, or some features may be ignored. Alternatively, or not, in addition, the coupling or direct coupling or communication connection between the displays or the discussions may be through some interfaces, and the indirect coupling or communication connection between the modules may be electrical or the like. There are no restrictions on the application. Moreover, the modules or sub-modules described as separate components may or may not be physically separated, may not be physical modules, or may be distributed to multiple circuit modules, and some or all of them may be selected according to actual needs. Modules are used to achieve the objectives of the present application.

The terminal in the present application includes all terminals supporting the Sidelink technology or the direct communication technology. The network side device includes but is not limited to the eNB in the LTE and the gNB in the 5G. The eNB in the application file may also be replaced by the gNB. For ease of understanding, the eNB is taken as an example for description in the embodiment. The method is applicable to LTE, 5G and future communication systems.

First, the system architecture or scenario of the application of this application will be briefly introduced.

The present application is applied to a UE-to-Network Relay scenario. The D2D technology defined by R12 and R13 of 3GPP is a technology for direct communication between devices and devices (the device includes all terminals supporting D2D technology, unless otherwise specified, The invention does not distinguish between the device and the terminal. The two devices can directly send messages and corresponding control information without passing through the base station (eNB). The D2D of R12/R13 is mainly for public security applications. Broadcast and multicast are the main communication methods, and the Physical Sidelink Broadcast Channel (PSBCH) for transmitting broadcast messages is defined for sending discovery messages. The Physical Sidelink Discovery Channel (PSDCH) of the (Discovery Message) and the Physical Bypass Control Information (SCI) may also be called the Physical Bypass Control of the Scheduling Assignment (SA). Channel (Physical Sidelink Control Channel, PSCCH), Physical Sidelink Shared Channel (PSSCH) for transmitting data, and Primary Sidelink Synchronization Signal (PSSS) and Bypass Secondary Synchronization Signal ( Secondary Sidelink Synchronization Signal, SSSS). R14V2X (Vehicle to Everything) enhances the channel structure and signal based on D2D to support high-speed vehicle to vehicle (V2V) communication services. The control information and service data transmitted by the device or the terminal are transmitted on the PSCCH and the PSSCH, respectively, and the service data is indicated by the control information. The communication between the devices is implemented by means of a broadcast, that is, the receiving device or the terminal obtains the service data of the transmitting device by detecting and demodulating the control information and the service data broadcasted by the transmitting end.

At the 3GPP RAN #71 meeting, the research project of the Continuing Evolution of D2D (FeD2D) was adopted. The typical application scenario is the UE-to-Network Relay scenario, that is, through the relay terminal or relay node (Relay). The primary purpose of the UE) is to transfer data and control information between the eNB and the remote terminal (Remote UE), and to study the D2D technology supporting low-cost devices such as wearable devices, that is, how to apply the D2D technology to a low-cost device. One of the research goals related to the physical layer is to identify some of the enhancement mechanisms of Sidelink, enabling Sidelink to support QoS, reliability, low complexity/low cost, and low power consumption.

In the current discussion of FeD2D RAN1, there are two possible relay modes: Bidirectional Relaying Mode and Unidirectional Relaying Mode, as shown in Figure 1 and Figure 2, respectively. In the two-way relay mode of 1, the relay UE can forward the uplink and downlink signaling and data between the eNB and the Remote UE, that is, the downlink signaling and data of the eNB to the Remote UE can be forwarded to the Remote UE through the Delay UE through the Relay UE, and the Remote UE The uplink signaling and data to the eNB can also be forwarded to the eNB through the uplink through the Relay UE. In the one-way relay mode shown in FIG. 2, the Remote UE directly receives downlink signaling and data from the eNB, and the Relay UE only forwards uplink signaling and data of the Remote UE to the eNB.

One of the main purposes of UE-NW relay is to reduce the power consumption of the remote terminal. Power control is an important way. In TR36.746, it has been clarified that in the UE-to-Network Relay scenario, the transmission power control of communication between the Relay UE and the Remote UE is based on the propagation path loss between the two, and the propagation path loss of the terminal to the eNB is only used. Calculate the maximum transmit power of the terminal. In addition, it also clarifies the Sidelink of a physical resource block (PRB) that is suitable for the Internet of Things (IoT) scenario, but requires the current discovery signal and bypass synchronization signal (Sidelink Synchronization). Signal, SLSS)/Physical Sidelink Broadcast Channel (PSBCH) is enhanced to support 1 PRB. Consider the scenario of a Remote UE that supports one PRB bandwidth. In this case, the bandwidth of the discovery signal needs to be reduced from the current two PRBs to one PRB. In order to keep the code rate unchanged, the message content of the signal is unchanged. The discovery signal needs to be extended from the current one subframe to two subframes.

To solve the transmit power control of the Sidelink signal during the communication between the Relay UE and the Remote UE in the UE-to-Network Relay scenario, the propagation path loss between the Relay UE and the Remote UE needs to be calculated. However, in the prior art, the discovery signal transmitted by the Relay UE is sent by broadcast, and the Remote UE is not explicitly indicated by the receiving end of the discovery signal, and the Relay UE cannot indicate the transmission power of the discovery signal for the Remote UE, so that the path loss cannot be calculated. Power control cannot be achieved. Therefore, it is a key to enable the remote UE to obtain the transmit power of the discovery signal. The method for indicating the transmit power applied to the UE-to-Network Relay scenario provided by the present application is described below.

Referring to FIG. 3, an embodiment of the present application provides a method for indicating a transmit power, including:

301. The relay device generates a transmit power indication information of the discovery signal.

In this embodiment, in the UE-to-Network Relay scenario, the relay device and the remote device can directly send messages and corresponding control information without using the base station, and the defined PSDCH is used for the relay device to broadcast and send the discovery signal. The discovery signal can also be called a discovery message. When the discovery signal is generated by the relay device, the transmit power of the discovery signal is first determined, and the transmit power indication information is generated according to the transmit power of the discovery signal, where the transmit power indication information is used to indicate the transmit power of the discovery signal.

302. The relay device sends the transmit power indication information to the remote device, where the remote device receives the transmit power indication information sent by the relay device.

In this embodiment, after the relay device generates the transmit power indication information, the transmit power indication information is sent to the remote device, and the remote device receives the transmit power indication information sent by the relay device, and the transmit power indication information may be It is carried in the discovery signal, and may be carried in other signals. The specific purpose is not limited herein. The ultimate purpose is to enable the remote device to obtain the transmission power of the discovery signal sent by the relay device.

303. The remote device obtains a transmit power of the discovery signal according to the transmit power indication information.

In this embodiment, after receiving the transmit power indication information sent by the relay device, the remote device can obtain the transmit power of the discovery signal according to the transmit power indication information, and then the remote device receives the transmit information sent by the relay device through the PSDCH. When the signal is found, the transmission power of the relay device when transmitting the discovery signal can be subtracted from the received signal strength (for example, Reference Signal Received Power (RSRP)) when the remote device receives the discovery signal, thereby obtaining the far Propagation path loss between the end device and the relay device.

In this embodiment, the relay device sends the transmit power indication information for indicating the discovery signal to the remote device, and the remote device can obtain the transmit power of the discovery signal by using the transmit power indication information, and then the remote device receives the discovery. When the signal is received, the transmission power of the relay device when transmitting the discovery signal can be subtracted from the received signal strength when the remote device receives the discovery signal, and the propagation path loss between the remote device and the relay device is obtained, and the remote device or the relay is obtained. The device can further determine the transmit power of the Sidelink signal, thereby implementing power control in the UE-to-Network Relay scenario.

In the embodiment shown in FIG. 3, the transmission power indication information is specifically transmitted from the relay device to the remote device, and the power indication information may be transmitted in the following manners: (1) The mask of the demodulation reference signal in the signal carries the power indication information, and the mask of the demodulation reference signal is an orthogonal mask (Cover Code, or Orthogonal) on the Demodulation Reference Signal (DMRS) symbol. (2) The power indication information is jointly carried by the mask of the demodulation reference signal in the discovery signal and the Master Information Block-Sidelink (MIB-SL) in the PSBCH.

The manners for transmitting the different power transmission indication information are described below by using the embodiments.

(1) carrying the transmit power indication information by discovering a mask of the demodulation reference signal in the signal;

Referring to FIG. 4, an embodiment of the present application provides a method for indicating a transmit power, including:

401. The relay device determines a transmit power of the discovery signal.

In this embodiment, in the UE-to-Network Relay scenario, the relay device and the remote device can directly send messages and corresponding control information without using the base station, and the defined PSDCH is used for the relay device to broadcast and send the discovery signal. The discovery signal can also be called a discovery message. Considering the scenario of a Remote UE supporting one PRB bandwidth, the bandwidth of the discovery signal needs to be reduced from the current two PRBs to one PRB, and the message content of the discovery signal remains unchanged. In the case of maintaining the code rate, the discovery signal needs to be extended from the current one subframe to two subframes, and when the relay device generates the discovery signal, the relay device has determined the transmission power of the discovery signal.

402. The relay device determines, according to the preset mapping table, a mask sequence corresponding to the transmit power.

In this embodiment, after the signal is found to be time-domain extended, the DMRS symbol is increased, and the orthogonal power mask on the added DMRS symbol is used to indicate the transmit power of the discovery signal, and the orthogonal mask of the DMRS is the frequency of each DMRS symbol. The domain sequence is multiplied by a value (1 or -1), and the mask sequence of the orthogonal masks of the two DMRS symbols can be (1, 1) and (1, -1), and the orthogonal mask is originally used to reduce Interference between DMRS signals, but in a relay scenario, the relay device can self-schedule the resources used by the discovery signal, and the remote device is not available, so the method of reducing interference by randomizing the orthogonal mask is in the middle. It does not make much sense in the context, so these orthogonal masks can be used to carry a limited number of power indication information. The entire transmit sequence can be used to indicate the transmit power. For example, if the signal is found to have N DMRS symbols, the mask sequence length is N, and the number of mask sequences Q is less than or equal to 2N, and each sequence can represent one type. Transmit power; or, use a partial mask in the mask sequence to indicate the transmit power. For example, if the signal is found to have N DMRS symbols, the mask is divided into two parts, and only a part of the mask is used to indicate the transmit power, each of which The partial mask sequence represents a type of transmit power. The preset mapping table includes a one-to-one mapping relationship between at least one transmit power and at least one mask sequence, for example, as shown in Table 1 below.

Table 1

Therefore, according to the mapping relationship in Table 1, the mask sequence can be determined according to the transmission power, and specifically, all the mask sequences or partial mask sequences are not limited, and all the mask sequences can correspond to a maximum of 16 different transmissions. The power, partial mask sequence can correspond to up to 4 different transmit powers.

403. The relay device generates a demodulation reference signal of the discovery signal according to the mask sequence.

In this embodiment, after the mask sequence has been determined, the relay device needs to generate a demodulation reference signal of the discovery signal according to the mask sequence. For example, the demodulation reference signal of the discovery signal transmitted by the relay device uses the entire mask. The sequence [1,1,1,-1] indicates that its transmission power is P1, then the generated demodulation reference signal is as shown in FIG. 5, and each symbol of the reference signal is sequentially multiplied by one bit of the mask sequence; The demodulation reference signal of the discovery signal transmitted by the relay device uses a partial mask sequence [1, -1], indicating that its transmission power is P1, then the generated demodulation reference signal is as shown in FIG. 6, and each of the reference signals The symbols are sequentially multiplied by one bit of the mask sequence.

404. The relay device sends the discovery signal including the demodulation reference signal to the remote device, where the remote device receives the discovery signal sent by the relay device.

In this embodiment, the relay device sends the discovery signal to the remote device through the PSDCH, and the remote device receives the discovery signal sent by the relay device.

405. The remote device parses the discovery signal to obtain a mask of the demodulation reference signal.

In this embodiment, the remote device parses the discovery signal to obtain a mask of the demodulation reference signal.

406. The remote device obtains a mask sequence according to a mask of the demodulation reference signal.

In this embodiment, the remote device obtains a mask sequence according to the mask of the demodulation reference signal.

407. The remote device determines a transmit power of the discovery signal according to the preset mapping table and the mask sequence.

In this embodiment, the remote device can determine the transmit power of the discovery signal by querying the preset mapping table in the case of a known mask sequence, and the remote device and the relay device use the same preset mapping table.

In the embodiment of the present application, the relay device carries the transmit power by using the mask of the demodulation reference signal in the discovery signal, and after receiving the discovery signal, the remote device parses the demodulation reference signal according to the mask of the demodulation reference signal. The code sequence can obtain the transmit power, and the transmit power is subtracted from the received signal strength when the remote device receives the discovery signal, and the propagation path loss between the remote device and the relay device is obtained, thereby implementing the UE-to-Network Relay scenario. Power control under.

(2) jointly carrying the power indication information by discovering the mask of the demodulation reference signal in the signal and the MIB-SL in the PSBCH

Referring to FIG. 7, an embodiment of the present application provides a method for indicating a transmit power, including:

701. The relay device determines a reference transmit power and a power offset value of the discovery signal.

In this embodiment, in the UE-to-Network Relay scenario, the relay device and the remote device can directly send messages and corresponding control information without using the base station, and the defined PSDCH is used for the relay device to broadcast and send the discovery signal. The discovery signal can also be called a discovery message. Considering the scenario of a remote terminal (Remote UE) supporting one PRB bandwidth, the bandwidth of the discovery signal needs to be reduced from the current two PRBs to one PRB, and the signal is found. In the case that the message content is unchanged, in order to keep the code rate unchanged, the discovery signal needs to be extended from the current one subframe to two subframes, and when the relay device generates the discovery signal, the relay device has determined to transmit the discovery signal. The reference transmit power, but may actually generate a power offset based on the reference transmit power when actually transmitting the discovery signal, and the amount of power offset generated is expressed as a power offset value.

702. The relay device generates reference power information in the bypass main information block according to the reference transmit power.

In this embodiment, the reference transmit power of the discovery signal may be the same as or different from the reference transmit power of the PSBCH. If they are the same, only one information field is needed to represent the reference transmit power of the PSBCH and the discovery signal; if not, the Two separate fields of information are used to represent the reference transmit power of the PSBCH and the discovery signal, respectively. The reference power information is represented by a field of an information field in the MIB-SL, the reference power information represents a reference transmit power, and the reference transmit power is defined as P_ref.

703. The relay device determines, according to the preset mapping table, a mask sequence corresponding to the power offset value.

In this embodiment, the power offset value represents a power offset based on P_ref, the power offset value is defined as P_offset=n*P_step, each mask sequence represents an n value, and P_step may be passed by the relay device through the MIB- The SL configuration is either pre-configured; or the power offset value is defined as the fractional value alpha, ie P_offset=alpha*P_ref. For example, the range of values of alpha can be defined as [0, 0.25, 0.75, 1]. The mask sequence corresponding to the power offset value can be as shown in Table 2 below.

Table 2

704. The relay device generates a demodulation reference signal of the discovery signal according to the mask sequence.

In this embodiment, after the relay device selects the mask sequence corresponding to the power offset value, the demodulation reference signal of the discovery signal is generated according to the mask sequence, that is, sequentially on the frequency domain sequence of each symbol of the demodulation reference signal. Multiply by one of the mask sequences.

705. The relay device sends the bypass main information block including the reference power information and the discovery signal including the demodulation reference signal to the remote device, where the remote device receives the discovery signal and the bypass main information block sent by the relay device.

In this embodiment, the relay device sends the bypass master information block including the reference power information to the remote device through the PSBCH, and sends the discovery signal including the mask of the demodulation reference signal to the remote device through the PSDCH, and the remote device The bypass master information block and the discovery signal are acquired through the PSBCH and the PSDCH, respectively. The transmit power of the discovery signal sent by the relay device is defined as Ptx=P_ref+Poffset, or Ptx=P_ref-Poffset, the reference transmit power is P_ref, and the power offset value is P_offset, which is not limited.

706. The remote device parses the discovery signal to obtain a mask of the demodulation reference signal, and parses the bypass main information block to obtain reference power information.

In this embodiment, the remote device parses the discovery signal to obtain a mask of the demodulation reference signal, and parses the bypass main information block to obtain reference power information.

707. The remote device determines, according to the reference power information, a reference transmit power of the discovery signal.

In this embodiment, the reference power information of the discovery signal is represented by an information field or field in the MIB-SL, and the reference transmit power P_ref can be obtained according to an information field or field in the MIB-SL.

708. The remote device obtains a mask sequence according to a mask of the demodulation reference signal, and determines a power offset value of the discovery signal according to the preset mapping table and the mask sequence.

In this embodiment, the remote device obtains a mask sequence according to the mask of the demodulation reference signal, and determines a power offset value P_offset of the discovery signal according to the preset mapping table and the mask sequence, which is used by the remote device and the relay device. The preset mapping table is the same.

709. The remote device calculates a transmit power of the discovery signal according to the reference transmit power and the power offset value.

In this embodiment, the remote device calculates the transmit power Ptx of the discovery signal according to the reference transmit power P_ref and the power offset value P_offset, and the power offset value P_offset is defined differently, and the transmit power Ptx can be expressed as Ptx=P_ref−n* P_step, or Ptx=P_ref+n*P_step, or Ptx=P_ref-P_ref*alpha, or Ptx=P_ref+P_ref*alpha. Specifically, how to calculate Ptx through P_ref and P_offset is not limited, but the relay device and the remote device should adopt the same convention.

In the embodiment of the present application, the relay device considers the reference transmit power of the discovery signal and the power offset value when actually transmitting the discovery signal, and transmits the reference transmit power through the MIB-SL, and passes the power offset value through the solution in the discovery signal. The mask of the reference signal is carried, and after receiving the discovery signal and the MIB-SL, the remote device can obtain the power offset value according to the demodulation reference signal, and obtain the reference transmission power through the MIB-SL, according to the reference transmission power and power. The offset value is calculated to obtain the transmit power, and the transmit power is subtracted from the received signal strength when the remote device receives the discovery signal, thereby obtaining the propagation path loss between the remote device and the relay device, thereby implementing the UE-to-Network Relay. Power control under the scene.

It should be noted that, in addition to the foregoing (1) and (2) modes, the power indication information may be carried by the MIB-SL in the PSBCH, that is, the MIB-SL adds a power indication field to indicate the PSBCH and the discovery signal. The transmit power, if both the PSBCH and the discovery signal have the same transmit power, only one field needs to be added; if both the PSBCH and the discovery signal have different transmit powers, then two separate power indication fields are used to indicate the PSBCH and Discover the transmit power of the signal.

It should be noted that, in the foregoing embodiment, the discovery signal is used as an example to describe how the relay device indicates the transmit power of the transmitted signal, and the method is also applicable to the relay device indicating the transmit power of other signals through other signals, for example, applicable to the physical shared channel. A signal carrying data transmitted on (Physical Shared CHannel, PSCH).

The above embodiment describes the transmission method of the transmission power, and the relay device and the remote device are respectively described separately by the modular device embodiment.

Referring to FIG. 8 , an embodiment of the present application provides a relay device, including:

The processing module 801 is configured to generate transmit power indication information of the discovery signal.

The sending module 802 is configured to send the transmit power indication information to the remote device, so that the remote device obtains the transmit power of the discovery signal according to the transmit power indication information.

In the embodiment of the present application, the sending module 802 sends the transmit power indication information that is used by the processing module 801 to indicate the transmit power of the discovery signal to the remote device, and the remote device can obtain the transmit power of the discovery signal by using the transmit power indication information. Then, when the remote device receives the discovery signal, the transmission power when the relay device sends the discovery signal can be subtracted from the received signal strength when the remote device receives the discovery signal, and the propagation path between the remote device and the relay device is obtained. The loss, the remote device or the relay device can further determine the transmit power of the Sidelink signal, thereby enabling power control in the UE-to-Network Relay scenario.

Optionally, in some embodiments of the present application, the transmit power indication information is represented by a mask of the demodulation reference signal.

The processing module 801 is specifically configured to determine a transmit power of the discovery signal;

The processing module 801 is further configured to determine, according to the preset mapping table, a mask sequence corresponding to the transmit power, where the preset mapping table includes a mapping relationship between the at least one transmit power and the one-to-one correspondence of the at least one mask sequence;

The processing module 801 is further configured to generate a demodulation reference signal of the discovery signal according to the mask sequence.

In the embodiment of the present application, in the UE-to-Network Relay scenario, the relay device and the remote device may directly send a message and corresponding control information without using the base station, and the PSDCH that has been defined is used for the broadcast transmission and discovery of the relay device. The signal and the discovery signal may also be referred to as a discovery message. Considering the scenario of a Remote UE supporting one PRB bandwidth, the bandwidth of the discovery signal needs to be reduced from the current 2 PRBs to 1 PRB, and the message content of the discovery signal is not In the case of change, in order to keep the code rate unchanged, it is necessary to expand the discovery signal from the current one subframe to two subframes, and when the relay device generates the discovery signal, the transmission power of the transmission discovery signal is already configured. After the discovery signal is spread in the time domain, the DMRS symbol is increased, and the orthogonal power mask on the added DMRS symbol is used to indicate the transmit power of the discovery signal. The orthogonal mask of the DMRS is multiplied by one in the frequency domain sequence of each DMRS symbol. The value (1 or -1), the mask sequence of the orthogonal mask of the two DMRS symbols can be (1, 1) and (1, -1), and the orthogonal mask is originally used to reduce the interference between the DMRS signals. However, in the relay scenario, the relay device can self-schedule the resources used by the discovery signal, and the remote device cannot be used. Therefore, the manner of reducing the interference by the randomized orthogonal mask does not mean in the relay scenario. Large, so these orthogonal masks can be used to carry a limited number of power indications. Then, the processing module 801 determines a mask sequence corresponding to the transmit power through the preset mapping table, and the processing module 801 generates a demodulation reference signal of the discovery signal according to the mask sequence.

Optionally, in some embodiments of the present application,

The sending module 802 is specifically configured to send the discovery signal including the demodulation reference signal to the remote device.

In the embodiment of the present application, after the processing module 801 generates the demodulation reference signal of the discovery signal according to the mask sequence, the sending module 802 sends the discovery signal to the remote device through the PSDCH.

Optionally, in some embodiments of the present application, the transmit power indication information includes reference power information and a power offset value represented by a mask of the demodulation reference signal,

The processing module 801 is specifically configured to determine a reference transmit power and a power offset value of the discovery signal, where the power offset value is a power offset generated by the reference device based on the reference transmit power when the discovery signal is transmitted by the relay device;

The processing module 801 is further configured to generate reference power information in the bypass main information block according to the reference transmit power;

The processing module 801 is further configured to determine, according to the preset mapping table, a mask sequence corresponding to the power offset value, where the preset mapping table includes a mapping relationship between the at least one power offset value and the one-to-one correspondence of the at least one mask sequence;

In the embodiment of the present application, when the processing module 801 generates the discovery signal, the reference transmit power of the transmit discovery signal is already configured, but when the discovery signal is actually sent, a power offset may be generated based on the reference transmit power, and a power offset is generated. The amount is expressed in terms of the power offset value. The processing module 801 uses the field of one information field in the MIB-SL to represent the reference power information, and the processing module 801 determines a mask sequence corresponding to the power offset value according to the preset mapping table, and generates a demodulation of the discovery signal according to the mask sequence. Reference signal.

Optionally, in some embodiments of the present application,

The sending module 802 is specifically configured to send the bypass master information block including the reference power information and the discovery signal including the demodulation reference signal to the remote device.

In the embodiment of the present application, the sending module 802 sends the bypass master information block including the reference power information to the remote device through the PSBCH, and sends the discovery signal including the demodulation reference signal to the remote device through the PSDCH, and the remote device passes the The PSBCH and PSDCH acquire the bypass master information block and the discovery signal.

Referring to FIG. 9, an embodiment of the present application provides a remote device, including

The receiving module 901 is configured to receive transmit power indication information sent by the relay device, where the transmit power indication information is used to indicate a transmit power of the discovery signal;

The processing module 902 is configured to obtain a transmit power of the discovery signal according to the transmit power indication information.

In the embodiment of the present application, the receiving module 901 receives the transmit power indication information that is used by the relay device to indicate the transmit power of the discovery signal, and the processing module 902 obtains the transmit power of the discovery signal according to the transmit power indication information, and then receives the received power at the receiving module 901. When the signal is found, the transmission power when the relay device transmits the discovery signal can be subtracted from the received signal strength when the receiving module 901 receives the discovery signal, and the propagation path loss between the remote device and the relay device can be obtained, thereby implementing the UE. Power control in the -to-Network Relay scenario.

The receiving module 901 is specifically configured to receive a discovery signal sent by the relay device.

The processing module 902 is further configured to parse the discovery signal to obtain a mask of the demodulation reference signal.

In the embodiment of the present application, if the transmit power indication information is represented by a mask of the demodulation reference signal, after the receiving module 901 receives the discovery signal sent by the relay device, the processing module 902 parses the discovery signal to obtain a mask of the demodulation reference signal. .

Optionally, in some embodiments of the present application,

The processing module 902 is further configured to obtain a mask sequence according to a mask of the demodulation reference signal;

The processing module 902 is further configured to determine, according to the preset mapping table and the mask sequence, the transmit power of the discovery signal, where the preset mapping table includes a mapping relationship between the at least one transmit power and the one-to-one correspondence of the at least one mask sequence.

In the embodiment of the present application, the processing module 902 obtains a mask sequence according to the mask of the demodulation reference signal, and then determines a transmit power of the discovery signal according to the preset mapping table and the mask sequence, where the preset mapping table includes at least one transmit power and at least A one-to-one mapping relationship of mask sequences, and the relay device is the same as the preset mapping table used by the processing module 902.

The receiving module 901 is specifically configured to receive a discovery signal and a bypass master information block sent by the relay device.

The processing module 902 is further configured to parse the discovery signal to obtain a mask of the demodulation reference signal, and parse the bypass main information block to obtain reference power information.

In the embodiment of the present application, if the power indication information includes the reference power information and the demodulation reference signal, after the receiving module 901 receives the discovery signal and the bypass main information block sent by the relay device, the processing module 902 parses the discovery signal to obtain a demodulation reference. The signal is parsed by the bypass main information block to obtain reference power information.

Optionally, in some embodiments of the present application,

The processing module 902 is further configured to determine, according to the reference power information, a reference transmit power of the discovery signal;

The processing module 902 is further configured to determine, according to the preset mapping table and the mask sequence, a power offset value of the discovery signal, where the preset mapping table includes a one-to-one mapping relationship between the at least one power offset value and the at least one mask sequence;

The processing module 902 is further configured to calculate a transmit power of the discovery signal according to the reference transmit power and the power offset value.

In the embodiment of the present application, the processing module 902 determines the reference transmit power of the discovery signal according to the reference power information, obtains a mask sequence according to the mask of the demodulation reference signal, and determines the power offset of the discovery signal according to the preset mapping table and the mask sequence. The value, the preset mapping table includes a one-to-one mapping relationship between the at least one power offset value and the at least one mask sequence, and the transmit power of the discovery signal is calculated according to the reference transmit power and the power offset value.

FIG. 10 is a schematic structural diagram of a relay device 1000 according to an embodiment of the present application. The edge gateway device 1000 includes at least one processor 1010 and a transceiver 1030, and the transceiver 1030 and the at least one processor 1010 are interconnected by a line.

Optionally, as shown in FIG. 10, in some embodiments of the present application, the edge gateway device 1000 further includes: a memory 1050; the memory 1050 may include a read only memory and a random access memory, and provide operations to the processor 1010. Instructions and data. A portion of the memory 1050 may also include non-volatile random access memory (NVRAM). Memory 1050 stores the following elements, executable modules or data structures, or a subset of them, or their extension set:

In the embodiment of the present application, the corresponding operation is performed by calling an operation instruction stored in the memory 1050 (which can be stored in the operating system). The processor 1010 controls the operation of the MEC network element device 1000. The processor 1010 may also be referred to as a central processing unit (CPU). Memory 1050 can include read only memory and random access memory and provides instructions and data to processor 1010. A portion of the memory 1050 may also include non-volatile random access memory (NVRAM). In a specific application, the components of the access network device 1000 are coupled together by a bus system 1020. The bus system 1020 may include a power bus, a control bus, a status signal bus, and the like in addition to the data bus. However, for clarity of description, various buses are labeled as bus system 1020 in the figure.

The method disclosed in the foregoing embodiment of the present application may be applied to the processor 1010 or implemented by the processor 1010. The processor 1010 may be an integrated circuit chip with signal processing capabilities. In the implementation process, each step of the foregoing method may be completed by an integrated logic circuit of hardware in the processor 1010 or an instruction in a form of software. The processor 1010 described above may be a general purpose processor, a digital signal processor (DSP), an application specific integrated circuit (ASIC), an off-the-shelf programmable gate array (FPGA) or other programmable logic device, a discrete gate or transistor logic device, or discrete hardware. Component. The methods, steps, and logical block diagrams disclosed in the embodiments of the present application can be implemented or executed. The general purpose processor may be a microprocessor or the processor or any conventional processor or the like. The steps of the method disclosed in the embodiments of the present application may be directly implemented by the hardware decoding processor, or may be performed by a combination of hardware and software modules in the decoding processor. The software module can be located in a conventional storage medium such as random access memory, flash memory, read only memory, programmable read only memory or electrically erasable programmable memory, registers, and the like. The storage medium is located in the memory 1050, and the processor 1010 reads the information in the memory 1050 and performs the steps of the above method in combination with its hardware.

The remote device can also be understood with reference to FIG.

The present application also provides a computer readable storage medium having instructions stored therein that, when run on a computer, cause the computer to perform the transmission power transmission method described in the above embodiments.

The present application also provides a computer program product comprising instructions which, when run on a computer, cause the computer to perform the method of transmitting transmit power as described in the above embodiments.

In the above embodiments, it may be implemented in whole or in part by software, hardware, firmware, or any combination thereof. When implemented in software, it may be implemented in whole or in part in the form of a computer program product.

The computer program product includes one or more computer instructions. When the computer program instructions are loaded and executed on a computer, the processes or functions described in accordance with embodiments of the present application are generated in whole or in part. The computer can be a general purpose computer, a special purpose computer, a computer network, or other programmable device. The computer instructions can be stored in a computer readable storage medium or transferred from one computer readable storage medium to another computer readable storage medium, for example, the computer instructions can be from a website site, computer, server or data center Transfer to another website site, computer, server, or data center by wire (eg, coaxial cable, fiber optic, digital subscriber line (DSL), or wireless (eg, infrared, wireless, microwave, etc.). The computer readable storage medium can be any available media that can be stored by a computer or a data storage device such as a server, data center, or the like that includes one or more available media. The usable medium may be a magnetic medium (eg, a floppy disk, a hard disk, a magnetic tape), an optical medium (eg, a DVD), or a semiconductor medium (such as a solid state disk (SSD)).

It should be understood that, in the various embodiments of the present application, the size of the sequence numbers of the foregoing processes does not mean the order of execution sequence, and the order of execution of each process should be determined by its function and internal logic, and should not be applied to the embodiment of the present application. The implementation process constitutes any limitation.

The above embodiments are only used to explain the technical solutions of the present application, and are not limited thereto; although the present application has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that they can still The technical solutions described in the embodiments are modified, or equivalent to some of the technical features are replaced; and the modifications or substitutions do not deviate from the scope of the technical solutions of the embodiments of the present application.

Claims

A method for indicating a transmit power, comprising:

The relay device generates a transmission power indication information of the discovery signal;

The relay device sends the transmit power indication information to the remote device, so that the remote device acquires the transmit power of the discovery signal according to the transmit power indication information.
The method according to claim 1, wherein said transmission power indication information is represented by a mask of a demodulation reference signal,

The relay device generates the transmit power indication information of the discovery signal, including:

The relay device determines the transmit power of the discovery signal;

Determining, by the relay device, a mask sequence corresponding to the transmit power according to a preset mapping table, where the preset mapping table includes a one-to-one mapping relationship between at least one transmit power and at least one mask sequence;

The relay device generates a demodulation reference signal of the discovery signal according to the mask sequence.
The method according to claim 2, wherein the relay device sends the transmit power indication information to the remote device, including:

The relay device transmits the discovery signal including the demodulation reference signal to a remote device.
The method according to claim 1, wherein the transmission power indication information comprises reference power information and a power offset value represented by a mask of a demodulation reference signal,

The relay device generates the transmit power indication information of the discovery signal, including:

The relay device determines a reference transmit power and a power offset value of the discovery signal, where the power offset value is a power offset generated on the basis of the reference transmit power when the relay device transmits the discovery signal;

The relay device generates reference power information in the bypass master information block according to the reference transmit power;

Determining, by the relay device, a mask sequence corresponding to the power offset value according to a preset mapping table, where the preset mapping table includes a one-to-one mapping relationship between at least one power offset value and at least one mask sequence ;

The relay device generates a demodulation reference signal of the discovery signal according to the mask sequence.
The method according to claim 4, wherein the relay device sends the transmit power indication information to the remote device, including:

The relay device transmits a bypass master information block including the reference power information and the discovery signal including the demodulation reference signal to a remote device.
A method for indicating a transmit power, comprising:

The remote device receives the transmit power indication information sent by the relay device, where the transmit power indication information is used to indicate the transmit power of the discovery signal;

The remote device obtains a transmit power of the discovery signal according to the transmit power indication information.
The method according to claim 6, wherein said transmission power indication information is represented by a mask of a demodulation reference signal,

Receiving, by the remote device, the transmit power indication information sent by the relay device, including:

The remote device receives the discovery signal sent by the relay device;

The remote device parses the discovery signal to obtain a mask of the demodulation reference signal.
The method according to claim 7, wherein the remote device obtains the transmit power of the discovery signal according to the transmit power indication information, including:

The remote device obtains a mask sequence according to a mask of the demodulation reference signal;

The remote device determines a transmit power of the discovery signal according to the preset mapping table and the mask sequence, where the preset mapping table includes a one-to-one mapping relationship between at least one transmit power and at least one mask sequence.
The method according to claim 6, wherein the transmission power indication information comprises reference power information and a power offset value represented by a mask of a demodulation reference signal,

Receiving, by the remote device, the transmit power indication information sent by the relay device, including:

The remote device receives the discovery signal sent by the relay device and the bypass main information block;

The remote device parses the discovery signal to obtain a mask of the demodulation reference signal, and parses the bypass main information block to obtain reference power information.
The method according to claim 9, wherein the remote device obtains the transmit power of the discovery signal according to the transmit power indication information, including:

Determining, by the remote device, a reference transmit power of the discovery signal according to the reference power information;

The remote device obtains a mask sequence according to a mask of the demodulation reference signal;

Determining, by the remote device, a power offset value of the discovery signal according to the preset mapping table and the mask sequence, where the preset mapping table includes one-to-one correspondence between at least one power offset value and at least one mask sequence Mapping relationship;

The remote device calculates a transmit power of the discovery signal according to the reference transmit power and the power offset value.
A relay device, comprising:

a processing module, configured to generate transmit power indication information of the discovery signal;

And a sending module, configured to send the transmit power indication information to the remote device, so that the remote device acquires the transmit power of the discovery signal according to the transmit power indication information.
The relay device according to claim 11, wherein the transmission power indication information is represented by a mask of a demodulation reference signal,

The processing module is specifically configured to determine a transmit power of the discovery signal;

The processing module is further configured to determine, according to a preset mapping table, a mask sequence corresponding to the transmit power, where the preset mapping table includes a one-to-one mapping relationship between at least one transmit power and at least one mask sequence;

The processing module is further configured to generate a demodulation reference signal of the discovery signal according to the mask sequence.
The relay device according to claim 12, characterized in that

The sending module is specifically configured to send the discovery signal including the demodulation reference signal to a remote device.
The relay device according to claim 11, wherein the transmission power indication information comprises reference power information and a power offset value represented by a mask of a demodulation reference signal,

The processing module is specifically configured to determine a reference transmit power and a power offset value of the discovery signal, where the power offset value is a power generated by the reference device based on the reference transmit power when the discovery device transmits the discovery signal Offset

The processing module is further configured to generate reference power information in the bypass main information block according to the reference transmit power;

The processing module is further configured to determine, according to a preset mapping table, a mask sequence corresponding to the power offset value, where the preset mapping table includes one-to-one correspondence between at least one power offset value and at least one mask sequence Mapping relationship;

The processing module is further configured to generate a demodulation reference signal of the discovery signal according to the mask sequence.
The relay device according to claim 14, wherein

The sending module is specifically configured to send a bypass master information block including the reference power information and the discovery signal including the demodulation reference signal to a remote device.
A remote device, comprising:

a receiving module, configured to receive transmit power indication information sent by the relay device, where the transmit power indication information is used to indicate a transmit power of the discovery signal;

And a processing module, configured to obtain, according to the transmit power indication information, a transmit power of the discovery signal.
The remote device according to claim 16, wherein the transmission power indication information is represented by a mask of a demodulation reference signal.

The receiving module is specifically configured to receive a discovery signal sent by the relay device.

The processing module is further configured to parse the discovery signal to obtain a mask of the demodulation reference signal.
The remote device of claim 17 wherein:

The processing module is further configured to obtain a mask sequence according to a mask of the demodulation reference signal;

The processing module is further configured to determine, according to the preset mapping table and the mask sequence, a transmit power of the discovery signal, where the preset mapping table includes one-to-one correspondence between at least one transmit power and at least one mask sequence. Mapping relations.
The remote device according to claim 16, wherein the transmit power indication information comprises reference power information and a power offset value represented by a mask of a demodulation reference signal,

The receiving module is specifically configured to receive a discovery signal and a bypass main information block sent by the relay device;

The processing module is further configured to parse the discovery signal to obtain a mask of the demodulation reference signal, and parse the bypass main information block to obtain reference power information.
The remote device of claim 19, wherein

The processing module is further configured to determine a reference transmit power of the discovery signal according to the reference power information;

The processing module is further configured to obtain a mask sequence according to a mask of the demodulation reference signal;

The processing module is further configured to determine a power offset value of the discovery signal according to the preset mapping table and the mask sequence, where the preset mapping table includes at least one power offset value and at least one mask sequence One-to-one correspondence relationship;

The processing module is further configured to calculate, according to the reference transmit power and the power offset value, a transmit power of the discovery signal.
A communication device, comprising: a transceiver and at least one processor, the transceiver and the at least one processor being interconnected by a line, the transceiver being operative to perform any of claims 1-5 In the method, the operation of transmitting and receiving information on the relay device side;

The at least one processor performs the information processing or control operation performed on the relay device side in the method of any of claims 1-5.
A communication device, comprising: a transceiver and at least one processor, the transceiver and the at least one processor being interconnected by a line, the transceiver for performing the method of any of claims 6-10 In the method, the operation of transmitting and receiving information is performed on the remote device side;

The at least one processor performs the information processing or control operations performed on the relay device side in the method of any of claims 6-10.
A communication device according to claim 21 or 22, wherein said communication device is a relay device or a chip.
The communication device according to claim 23, wherein said chip is built in said relay device or disposed outside said relay device and coupled to said relay device.
A system, characterized in that the system comprises, for example, a relay device and a remote device, the relay device is in communication connection with the remote device, and the relay device is configured to perform according to claims 1-5 The method of any of the preceding claims, the remote device for performing the method of any of claims 6-10.
A computer program product, characterized in that the computer program product comprises software code for performing the method of any one of claims 1-5 or 6-10.
A computer readable storage medium comprising instructions, wherein the instructions, when executed on an electronic device, cause the electronic device to perform the method of any of claims 1-5 or 6-10.