A method and device for power control

Abstract

The present application provides a method for power control, the method comprising: a second node receives a radio resource control RRC from a first node, the RRC comprising: a power control parameter set configured for the second node, the power control parameter set comprising: a power control index, the power control index is determined according to the transmission mode and / or transmission capability of the second node; receiving downlink control information DCI, the DCI comprising: power control index indication information, the power control index indication information is used to indicate the power control index value of the uplink transmission configured for the second node when the first node schedules the second node; determining the transmission power according to the power control index indication information and the power control parameter set; and sending a signal at the determined transmission power. The method supports more transmission modes, for example, a node supports at least two transmission beams, and performs power control parameter adjustment more flexibly and quickly in scenarios such as space division multiplexing and non-space division multiplexing.

Description

Technical Field

[0001] The present application relates to the field of communications, and more specifically, to a power control method and device. Background Art

[0002] In the fifth generation mobile networks or 5th generation wireless systems (5G), the integrated access and backhaul (IAB) node is an evolutionary node of relay technology. In wireless communication networks, relay nodes are usually used to achieve extended coverage or blind area coverage, or to increase system capacity. The IAB node is functionally divided into: IAB mobile terminal (mobile terminating, MT) and IAB base station distributed unit (Distributed Unit, DU). Among them, IAB MT refers to IAB as a terminal device UE, accessing the upper node. IAB DU refers to IAB as a base station distributed unit, providing access services to UE and other downstream nodes.

[0003] When an IAB node accesses the network, the link through which the IAB DU provides services to the UE is called the access link (AC), and the link through which data is sent to other IAB nodes is called the backhaul link (BH). If the calculation process of the transmit power in the prior art is used, the transmit power of the access link and the backhaul link of the IAB node will be unbalanced, which will have a great impact on the link. Therefore, how to control the power of the IAB node is an issue that needs to be considered in the current IAB standardization. Summary of the invention

[0004] In view of this, the present application provides a power control method and device, which determines the value of the power control index through the transmission mode and / or transmission capability, can meet more application scenarios, support more transmission modes, such as a node supports at least two transmission beams, and can adjust the power control parameters more flexibly and quickly in scenarios such as space division multiplexing and non-space division multiplexing.

[0005] In a first aspect, a power control method includes:

[0006] The second node receives a radio resource control RRC from the first node, the RRC including: a power control parameter set configured for the second node, the power control parameter set including: a power control index, the power control index is determined according to the transmission mode and / or transmission capability of the second node; the second node receives downlink control information DCI, the DCI including: power control index indication information, the power control index indication information is used to indicate the power control index value of the uplink transmission configured for the second node when the first node schedules the second node; the second node determines the transmission power according to the power control index indication information and the power control parameter set; the second node sends a signal at the determined transmission power.

[0007] By providing in the above-mentioned embodiments, when considering power control of a node, the value of the power control index is determined according to the transmission mode and / or transmission capacity, so that more application scenarios can be met and more transmission modes can be supported. For example, a node supports at least two transmission beams, and power control parameters can be adjusted more flexibly and quickly in scenarios such as space division multiplexing and non-space division multiplexing.

[0008] In a possible implementation, the transmission mode of the second node is a space division multiplexing transmission mode, and the transmission capability of the second node is the number of beams supported by the second node.

[0009] In a possible implementation manner, the method further includes: the power control indexes corresponding to different transmission modes are different from the power control indexes corresponding to different transmission capabilities.

[0010] In a possible implementation manner, the power control parameter set further includes at least one of the following power control parameters:

[0011] Uplink power control flag, uplink reference signal path loss flag, uplink transmission reference power, power control parameter or path loss compensation factor.

[0012] In a possible implementation manner, the power control index is associated with the power control parameter.

[0013] In a possible implementation manner, the second node determining the transmit power according to the power control index indication information and the power control parameter set specifically includes:

[0014] The second node obtains, according to the power control index indication information, a power control index indicated by the power control index indication information;

[0015] The second node obtains, according to the obtained power control index, a power control parameter corresponding to the power control index through the power control parameter set;

[0016] The second node determines the transmission power according to the power control parameter and the power control calculation formula.

[0017] In a second aspect, a power control method includes:

[0018] Sending a reference signal;

[0019] receiving a dynamic range of transmit power, wherein the transmit power dynamic range is a transmit power dynamic range determined according to a reference signal;

[0020] Determining the transmit power according to the dynamic range of the transmit power;

[0021] A signal is transmitted with a determined transmission power.

[0022] In the solution of this embodiment, the relay node measures and then feeds back the uplink power dynamic range, thereby determining the uplink transmission power, so that when the relay node sends data by spatial division, the transmission power can be reasonably controlled, thereby reducing the interference effect on other links.

[0023] In a possible implementation manner, the transmission power dynamic range includes: a dynamic range of a power spectrum density PSD and / or a dynamic range of a power factor ratio EPRE.

[0024] In a possible implementation manner, determining the transmit power according to the dynamic range of the transmit power specifically includes:

[0025] The transmit power is adjusted according to the dynamic range of the transmit power and the pre-configured transmit power.

[0026] In a third aspect, a power control device includes:

[0027] A transceiver is used to receive a radio resource control RRC, the RRC comprising: a power control parameter set of a power control device, the power control parameter set comprising: a power control index, the power control index is determined according to a transmission mode and / or transmission capability of the power control device; and receive downlink control information DCI, the DCI comprising: power control index indication information, the power control index indication information is used to indicate a configured power control index value for uplink transmission.

[0028] The processor is used to determine the transmission power according to the power control index indication information and the power control parameter set.

[0029] In a fourth aspect, a power control device includes:

[0030] A transceiver, configured to send a reference signal and receive a dynamic range of a transmission power, wherein the transmission power dynamic range is a transmission power dynamic range determined according to the reference signal; and to send a signal at the determined transmission power.

[0031] The processor is used to determine the transmission power according to the dynamic range of the transmission power.

[0032] In a fifth aspect, a power control device includes:

[0033] Memory, used to store programs;

[0034] A processor is used to execute the program stored in the memory. When the program is executed, the processor is used to execute any method described in the first aspect or the second aspect.

[0035] In a sixth aspect, a power control device includes:

[0036] A computer-readable storage medium comprising instructions, when the instructions are executed on a computer, causes the computer to execute the method according to any one of the first aspect or the second aspect

[0037] In the seventh aspect, a power control device comprises: a computer program product, characterized in that the computer program product comprises a computer program code, and when the computer program code runs on a computer, the computer executes any method as described in the first aspect or the second aspect.

[0038] In an eighth aspect, a chip comprises a memory and a processor, wherein the memory is used to store a computer program, and the processor is used to call and run the computer program from the memory, so that the processor executes the method as described in any one of the first aspect or the second aspect. BRIEF DESCRIPTION OF THE DRAWINGS

[0039] Figure 1 is a system architecture diagram of an embodiment of the present application;

[0040] Figure 2-Figure 5 This is another system architecture diagram provided by an embodiment of the present application;

[0041] Figure 6 is a schematic flow chart of a power control method provided in an embodiment of the present application;

[0042] Figure 7 is a schematic flow chart of another power control method provided in an embodiment of the present application;

[0043] Figure 8 It is a schematic block diagram of a power control device according to an embodiment of the present application.

[0044] Fig. 9 It is a schematic block diagram of another power control device according to an embodiment of the present application.

[0045] Fig.10 It is a schematic diagram of the hardware structure of a network device according to an embodiment of the present application. DETAILED DESCRIPTION

[0046] The technical solution in this application will be described below in conjunction with the accompanying drawings.

[0047] Figure 1 Schematic diagram of a communication system provided in an embodiment of the present application. Figure 1 As shown, the communication system includes a network device and at least one terminal device, wherein the terminal device is within the coverage of the network device and communicates with the network device to implement the technical solutions provided by the following embodiments of the present application. The communication system of this embodiment can be applied to multiple TRP scenarios.

[0048] The embodiments of the present application describe various embodiments in combination with a network device and a terminal device, and the network device and the terminal device can operate in a licensed frequency band or an unlicensed frequency band, wherein:

[0049] The terminal device may also be referred to as user equipment (UE), access terminal, user unit, user station, mobile station, mobile station, remote station, remote terminal, mobile device, user terminal, terminal, wireless communication device, user agent or user device. The terminal device may be a station (STATION, ST) in a wireless local area network (WLAN), a cellular phone, a cordless phone, a session initiation protocol (SIP) phone, a wireless local loop (WLL) station, a personal digital assistant (PDA) device, a handheld device with wireless communication function, a computing device or other processing device connected to a wireless modem, a vehicle-mounted device, a wearable device, and a next-generation communication system, for example, a terminal device in a fifth-generation (5G) network or a terminal device in a future-evolved public land mobile network (PLMN) network, a terminal device in an NR system, etc.

[0050] As an example but not limitation, in the embodiments of the present application, the terminal device may also be a wearable device. Wearable devices may also be referred to as wearable smart devices, which are a general term for wearable devices that are intelligently designed and developed using wearable technology for daily wear, such as glasses, gloves, watches, clothing, and shoes. A wearable device is a portable device that is worn directly on the body or integrated into the user's clothes or accessories. Wearable devices are not only hardware devices, but also powerful functions achieved through software support, data interaction, and cloud interaction. Broadly speaking, wearable smart devices include full-featured, large-sized, and fully or partially independent of smartphones, such as smart watches or smart glasses, as well as devices that only focus on a certain type of application function and need to be used in conjunction with other devices such as smartphones, such as various types of smart bracelets and smart jewelry for vital sign monitoring.

[0051] In addition, network equipment is also called radio access network (RAN) equipment, which is a device that connects terminal equipment to a wireless network. It can be an evolved base station (eNB or eNodeB) in Long Term Evolution (LTE), or a relay station or access point, or a network device in a 5G network or a network device in a future evolved PLMN network, or a new generation base station (new radio NodeB, gNodeB) in an NR system, etc., and is not limited here.

[0052] In addition, in an embodiment of the present application, the network device provides services for the cell, and the terminal device communicates with the network device through the transmission resources (e.g., frequency domain resources, or spectrum resources) used by the cell. The cell may be a cell corresponding to a network device (e.g., a base station), and the cell may belong to a macro base station or a base station corresponding to a small cell. The small cells here may include: metro cells, micro cells, pico cells, femto cells, etc. These small cells have the characteristics of small coverage and low transmission power, and are suitable for providing high-speed data transmission services.

[0053] Figure 1 A schematic diagram of the structure of a communication system applicable to an embodiment of the present application.

[0054] It should be noted that the communication systems mentioned in the embodiments of the present application include but are not limited to: narrowband Internet of Things (NB-IoT) system, long term evolution (LTE) system, next-generation 5G mobile communication system or communication system after 5G, or device to device (D2D) communication system.

[0055] exist Figure 1 In the communication system shown, an integrated access and backhaul IAB system is provided. An IAB system includes at least one base station 100, one or more terminals 101 served by the base station 100, one or more relay nodes rTRP110, and one or more terminals 111 served by the rTRP 110. Usually, the base station 100 is called a donor base station (donor generation node B, DgNB), and the rTRP 110 is connected to the base station 100 via a wireless backhaul link 113. In this application, the terminal is also called a terminal, and the donor base station is also called a donor node, that is, a donor node. The base station includes but is not limited to: an evolved node base (eNB), a radio network controller (RNC), a node B (NB), a base station controller (BSC), a base transceiver station (BTS), a home base station (e.g., home evolved node B, or home node B, HNB), a baseband unit (BBU), or a next generation new air interface base station (such as gNB), etc.

[0056] The integrated access and backhaul system may also include multiple other relay nodes, such as rTRP 120 and rTRP130, where rTRP 120 is connected to relay node rTRP 110 via a wireless backhaul link 123 to access the network, and rTRP130 is connected to relay node rTRP 110 via a wireless backhaul link 133 to access the network. rTRP 120 serves one or more terminals 121, and rTRP 130 serves one or more terminals 131. Figure 1In the embodiment, both the relay nodes rTRP 110 and rTRP 120 are connected to the network via wireless backhaul links. In the present application, the wireless backhaul links are all viewed from the perspective of the relay nodes, for example, the wireless backhaul link 113 is the backhaul link of the relay node rTRP 110, and the wireless backhaul link 123 is the backhaul link of the relay node rTRP 120. Figure 1 As shown, a relay node, such as 120, can be connected to another relay node 110 via a wireless backhaul link, such as 123, thereby connecting to the network. Moreover, the relay node can be connected to the network via multiple levels of wireless relay nodes.

[0057] Generally, the node providing wireless backhaul link resources, such as 110, is called the upper node of the relay node 120, and 120 is called the lower node of the relay node 110. Generally, the lower node can be regarded as a terminal of the upper node. It should be understood that Figure 1 In the integrated access and backhaul system shown, one relay node is connected to one upper node, but in future relay systems, in order to improve the reliability of the wireless backhaul link, one relay node, such as 120, may have multiple upper nodes providing services for it at the same time. For example, the rTRP 130 in the figure can also be connected to the relay node rTRP 120 via the backhaul link 134, that is, rTRP 110 and rTRP 120 are both upper nodes of rTRP 130. In the present application, the terminals 101, 111, 121, 131 may be stationary or mobile devices. For example, the mobile device may be a mobile phone, a smart terminal, a tablet computer, a laptop computer, a video game console, a multimedia player, or even a mobile relay node. Stationary devices are usually located in fixed locations, such as computers, access points (connected to the network via a wireless link, such as a stationary relay node), etc. The names of the relay nodes rTRP110, 120, 130 do not limit the scenarios or networks in which they are deployed, and may be any other names such as relay, RN, etc. This application uses rTRP only for the convenience of description.

[0058] exist Figure 1In the embodiment, the wireless links 102, 112, 122, 132, 113, 123, 133, 134 can be bidirectional links, including uplink and downlink transmission links. In particular, the wireless backhaul links 113, 123, 133, 134 can be used for the upper node to provide services to the lower node, such as the upper node 100 provides wireless backhaul services to the lower node 110. It should be understood that the uplink and downlink of the backhaul link can be separated, that is, the uplink and downlink are not transmitted through the same node. The downlink transmission refers to the upper node, such as node 100, transmitting information or data to the lower node, such as node 110, and the uplink transmission refers to the lower node, such as node 110, transmitting information or data to the upper node, such as node 100. The node is not limited to being a network node or a terminal. For example, in a D2D scenario, the terminal can act as a relay node to serve other terminals. The wireless backhaul link can also be an access link in some scenarios. For example, the backhaul link 123 can also be regarded as an access link for the node 110, and the backhaul link 113 is also an access link for the node 100. It should be understood that the upper node can be a base station or a relay node, and the lower node can be a relay node or a terminal with a relay function. For example, in a D2D scenario, the lower node can also be a terminal.

[0059] Figure 1 In the context of a Donor node, a Donor node refers to a node through which the core network can be accessed, or an anchor base station of a wireless access network, through which the network can be accessed. The anchor base station is responsible for data processing at the packet data convergence protocol (PDCP) layer, or is responsible for receiving data from the core network and forwarding it to the relay node, or receiving data from the relay node and forwarding it to the core network.

[0060] For ease of description, the relay node is referred to as the first node, and the upper node of the first node is referred to as the second node. The first node and the second node may be a base station, a relay node, a terminal with a relay function, or any device with a relay function.

[0061] When the relay node is under the half-duplex constraint, the spectrum resources of the wireless backhaul link of the in-band relay overlap with the access link, that is, the backhaul link of the in-band relay has the same frequency band as the access link. For example, when the rTRP receives on the downlink wireless backhaul link of the base station, it cannot transmit to the subordinate terminal or device; and when the rTRP performs uplink transmission to the superior node on the backhaul link, it cannot receive the transmission of the subordinate terminal or device on the uplink access link or the backhaul link of the subordinate node. It should be understood that the half-duplex constraint of the in-band relay refers to the half-duplex constraint of simultaneous and co-frequency transmission and reception, and has nothing to do with the time division duplexing (TDD) or frequency division duplexing (FDD) adopted by the system itself.

[0062] The following are definitions of some commonly used technical terms:

[0063] Access link: Access link refers to the wireless link used by a node to communicate with its subordinate nodes, including uplink and downlink transmission links. Uplink transmission on the access link is also called uplink transmission of the access link, and downlink transmission is also called downlink transmission of the access link. The nodes include but are not limited to the aforementioned IAB nodes.

[0064] Backhaul link: A backhaul link refers to a wireless link used by a node to communicate with its upper node, including uplink and downlink transmission links. Uplink transmission on a backhaul link is also called uplink transmission of the backhaul link, and downlink transmission is also called downlink transmission of the backhaul link. The nodes include but are not limited to the aforementioned IAB nodes.

[0065] Beam can be understood as a spatial resource, which can refer to a sending or receiving precoding vector with energy transmission directivity. Moreover, the sending or receiving precoding vector can be identified by index information. Among them, the energy transmission directivity can refer to the precoding processing of the signal to be sent through the precoding vector, and the signal after the precoding processing has a certain spatial directivity, and the signal received after the precoding processing by the precoding vector has a better receiving power, such as satisfying the receiving demodulation signal-to-noise ratio, etc.; the energy transmission directivity can also refer to the same signal sent from different spatial positions received through the precoding vector has different receiving powers. Optionally, the same communication device, such as a terminal device or a network device, can have different precoding vectors, and different communication devices can also have different precoding vectors, that is, corresponding to different beams.

[0066] According to the configuration or capability of the communication device, a communication device can use one or more of a plurality of different precoding vectors at the same time, that is, it can form one beam or multiple beams at the same time. The beam information can be identified by index information, and optionally, the index information can correspond to a resource identifier (identity, ID) configured for the terminal device. For example, the index information can correspond to the ID or index (index) or resource of the configured channel state information reference signal (CSI-RS), or the ID or resource of the corresponding configured uplink sounding reference signal (SRS). Alternatively, optionally, the index information can also be index information displayed or implicitly carried by a signal or channel carried by the beam, for example, the index information includes but is not limited to the index information of the beam indicated by the synchronization signal or broadcast channel sent by the beam. The resource can be at least one of the following: time domain, frequency domain, code domain (sequence).

[0067] It should be understood that the term "and / or" used in this article is merely a description of the association relationship between associated objects, indicating that three relationships may exist. For example, A and / or B can mean: A exists alone, A and B exist at the same time, and B exists alone.

[0068] In addition, since 5G NR supports high frequency bands and adopts Massive MIMO technology, the energy of the signal can be concentrated in a certain direction, so that the IAB device can receive signals transmitted from multiple directions at the same time. The following introduces some system composition diagrams in IAB space division transmission, such as Figure 2-Figure 5 shown.

[0069] Figure 2-Figure 5 As shown, the IAB system includes: IAB devices, such as: IAB node 0, IAB node 1, IAB node 2, and terminal devices UE served by each IAB device. Figure 2 In the example, IAB node 1 receives an uplink signal from the UE and an uplink signal from IAB node 2 simultaneously. Figure 3 In the example, the UE served by IAB node 1 and the adjacent node IAB node 2 send uplink signals simultaneously, and IAB node 1 receives the uplink signal from the UE and the uplink signals from IAB node 0 and IAB node 2 simultaneously. Figure 4In the example, the UE served by the IAB node 1 and the IAB node 2 send uplink signals simultaneously, and the IAB node 1 receives the uplink signal from the UE and the uplink signal from the IAB node 2 simultaneously. Figure 5 In the example, at the same time point or in the same time period, IAB node 2 sends a downlink signal to the UE and sends an uplink signal to IAB node 1 at the same time.

[0070] Figure 6 A flow chart of a power control method provided in an embodiment of the present application is as follows: Figure 6 As shown, the method of this embodiment includes:

[0071] The following takes the relay node in IAB as an example. Figure 5 The power control method is described by taking the IAB system architecture shown as an example, wherein, for ease of description, IAB Node2 is used as the first node, and the upper node of the first node is called the second node, such as IAB Node1. The first node and the second node can be a base station, a relay node, a terminal with a relay function, or any device with a relay function. At the same time point or in the same time period, IAB node 2 sends a downlink signal to the terminal device UE, and sends an uplink signal to IAB node 1 at the same time.

[0072] S600. The first node sends a radio resource control RRC to the second node, where the RRC includes: a power control parameter set configured for the second node, where the power control parameter set includes: a power control index, where the power control index is determined according to a transmission mode and / or a transmission capability.

[0073] The power control parameter set is used to control the transmission power of the physical uplink control channel (PUCCH) of the second node.

[0074] The power control parameter set includes: a power control index, specifically, the power control index may be a channel sounding reference signal-Resource Index (SRI), and the SRI is determined according to the transmission mode and / or transmission capability, wherein the transmission mode may be a space division multiplexing transmission mode, and the transmission capability may be the number of beams supported by the second node. Different beams correspond to different power control indexes, and different transmission modes correspond to different power control indexes. According to different transmission modes and / or transmission capabilities, the value of the power control index may be at least 2, for example, 2, or 4, etc.

[0075] Taking the channel sounding reference signal resource index-physical uplink control channel-closed loop index SRI-PUSCH-CloesdLoopIndex as an example, combined with Figure 4 and Figure 5 The value of the closed-loop index is specifically described by taking different application scenarios and different beams supported by the second node as examples.

[0076] by Figure 4 and Figure 5 Taking the system as an example, different transmission modes correspond to different power control indexes, and the value of the closed-loop index may include: i0 and i1, which may be indicated by 1 bit, for example, bit0 indicates i0, and bit1 indicates i0.

[0077] i0 is used to indicate that the second node IAB node2 is Figure 4 In this space division multiplexing scenario, the power index value configured for sending uplink signals to node1;

[0078] i1 is used for the second node IAB node2 Figure 5 In this space division multiplexing scenario, the power index value configured for sending uplink signals to node1;

[0079] because Figure 4 and Figure 5 In different scenarios, especially Figure 5 In the example, since the second node provides services to the terminal device as a base station at the same time point or in the same time period, and at the same time sends an uplink signal to the first node as an access terminal, the second node should consider the link interference or influence of the second node providing services to the terminal device as a base station. Therefore, relative Figure 4 The configured uplink transmit power of the second node in Figure 5 The uplink transmission power between the second node and the first node in the embodiment needs to be distinguished, and different uplink transmission powers are configured. The difference in uplink transmission power can be distinguished by i0 and i1 in the power control set, and further indicated to be configured with different power control parameter sets.

[0080] by Figure 4 or Figure 5 Taking the system as an example, different transmission modes correspond to different power control indexes. The above-mentioned second node IAB node2 can also be used as a base station, using one or more beams to send uplink signals to the first node IABnode1. The value of the closed-loop index may include: i0, i1, i2, i3, and the value may be indicated by 2 bits, for example, 0 0 indicates i0, 01 indicates i1, 10 indicates i2, and 11 indicates i3.

[0081] based on Figure 4 , the second node can support two beams, for example, beam 1 and beam 2:

[0082] i0 is used to indicate the power index value that needs to be configured when the second node IAB node2 uses beam 1 to send a signal to node1;

[0083] i1 is used to indicate the power index value that needs to be configured when the second node IAB node2 uses beam 2 to send a signal to node1.

[0084] based on Figure 5 , the second node can support two beams, for example, beam 1 and beam 2:

[0085] i2 is used to indicate the power index value that needs to be configured when the second node IAB node2 uses beam 1 to send a signal to node1;

[0086] i3 is used to indicate the power index value that needs to be configured when the second node IAB node2 uses beam 2 to send a signal to node1.

[0087] Since it is necessary to consider the interference or impact of the link that the second node provides services to the terminal device as a base station, it is further necessary to consider that different power index values ​​correspond to different beams. The difference in uplink transmit power can be distinguished by i0, i1, i2, and i3 in the power control set, and then further indicated by configuring different power control parameter sets.

[0088] Furthermore, the power control parameter set also includes at least one of the following parameters characterizing power control:

[0089] 1. Uplink power control identification ID, such as SRI-PUSCH-PowerControl ID;

[0090] 2. Uplink reference signal path loss identification ID, such as PUSCH-PathlossReference RS-ID;

[0091] 3. Uplink transmission reference power p0-NominalWithGrant, with a value range of (-202 to 24) dBm, is the nominal reference power for uplink transmission;

[0092] 4. The power control parameter P_0 is the adjustment amount of power control;

[0093] 5.alpha is the path loss compensation factor. 1 is the default value. The value range is 0 to 1. When it is 1, all path losses are compensated. When it is 0, no path loss is compensated at all. Multiply it by the path loss to get the specific path loss compensation. That is, alpha*PathLoss;

[0094] Except for p0-NominalWithGrant, all the other values ​​​​above are included in P0-PUSCH-AlphaSet. The above power parameter sets are numbered with IDs.

[0095] The power control index is associated with the above power control parameter, and different power parameter sets are provided for different transmission capabilities of different nodes and different transmission modes.

[0096] Each parameter in the above power control set may be carried and sent via one or more RRC signalings.

[0097] S602: The second node receives the RRC and obtains a power control parameter set in the RRC.

[0098] Specifically, the second node receives the RRC, obtains the power control parameter set in the RRC, establishes the power control index and the power control parameter according to the power control parameter and the power control index in the power control parameter set, The relationship between them is as follows:

[0099] Optionally, the second node stores and configures the parameters in the RRC power control parameter set.

[0100] S604: The first node sends a DCI to the second node, where the DCI includes power control index indication information, where the power control index indication information is used to configure a power control index value for uplink transmission of the second node when the first node schedules the second node.

[0101] The power control index indication information can be represented by bits. Figure 4 and Figure 5 For example, different transmission modes correspond to different power control indexes. The closed-loop index value may include: i0 and i1. The value may be indicated by one bit, for example, bit0 indicates i0 and bit1 indicates i0. Figure 4 or Figure 5Taking the system as an example, different transmission modes correspond to different power control indexes. The second node IAB node2 can also be used as a base station, using one or more beams to send uplink signals to the first node IAB node1. The value of the closed-loop index may include: i0, i1, i2, i3, and the value may be indicated by 2 bits, for example, 0 0 indicates i0, 01 indicates i1, 11 indicates i2, and 11 indicates i3. It is not limited to use 1 bit or 2 bits to indicate the power control index, and other methods are also acceptable.

[0102] S606. The second node receives the DCI, obtains power control index indication information, and determines a power control index value corresponding to the power control index indication information according to the power control index indication information.

[0103] Specifically, the second node determines the power control index value corresponding to the power control index indication information according to the power control index indication information of the DCI, for example, 0, and determines that the power control index value corresponding to the power control index indication information 0 is i0.

[0104] S608: The second node determines the transmission power of the second node according to the power control index value and the power control parameter set.

[0105] The second node searches for a power control parameter set according to a power index value, such as i0, matches a power control parameter corresponding to i0, and obtains the power control parameter. The second node calculates the transmission power of the second node according to the obtained power control parameter using a power control calculation formula.

[0106] The calculation formula for the power control may be:

[0107]

[0108] The parameters involved in each power control parameter set involved in the above formula can be configured to the second node through RRC signaling.

[0109] S610: The second node sends a signal with a determined transmission power.

[0110] By providing in the above-mentioned embodiments, when considering power control of a node, the value of the power control index is determined according to the transmission mode and / or transmission capacity, so that more application scenarios can be met and more transmission modes can be supported. For example, a node supports at least two transmission beams, and power control parameters can be adjusted more flexibly and quickly in scenarios such as space division multiplexing and non-space division multiplexing.

[0111] The embodiment of the present invention also provides another embodiment, such as Figure 7 shown.

[0112] When a relay node, such as a second node, provides services to a terminal device, the first node needs to consider the access power difference of the backhaul link when scheduling the second node. Therefore, an embodiment of the present invention also provides another power control method flow, such as Figure 7 As shown, the method includes:

[0113] by Figure 5 The IAB network architecture diagram is used as an example to illustrate, but is not limited to Figure 5 , can be applied to the above Figure 1-Figure 5 Various network architecture diagrams are shown in the figure.

[0114] S700: The second node sends a reference signal.

[0115] The reference signals include: a synchronization signal SSB, a channel state information reference signal CSI-RS, a demodulation reference signal DMRS, a tracking reference signal TRS, a phase tracking reference signal PTRS, a sounding reference signal SRS, or other reference signals RS.

[0116] The reference signal sent by the second node may include: a signal from the second node to the first node, or a signal from the second node to the terminal device UE, and here mainly takes the downlink signal from the second node to the terminal device UE as an example.

[0117] S702: The first node measures a reference signal (RS) sent by the second node to determine a dynamic range of the transmission power of the second node.

[0118] The transmission power of the second node is the power of the second node sending a signal to the UE or other nodes on the access link. The transmission power is the downlink transmission power of the second node, for example Figure 5 , the downlink transmission power from the second node to the UE or the downlink transmission power from the second node to the next node.

[0119] Specifically, S702 may include:

[0120] First, the first node measures the reference signal to obtain a measurement result, where the measurement result is used to characterize the interference strength of the reference signal.

[0121] Secondly, the first node determines the dynamic range of the transmission power of the second node according to the measurement result.

[0122] The measurement results include at least one of the following:

[0123] Reference signal received power (RSRP), reference signal receiving quality (RSRQ), received signal strength indicator (RSSI) or signal interference level (signal to interference plus noise ratio SINR signal to interference plus noise ratio).

[0124] Among them, the dynamic range of the transmit power can be the adjustment value of the transmit power of the second node, for example: ±Xdb or ±Xdbm, or it can be the upper limit value of the uplink transmit power, such as Xdb or Xdbm, indicating that the uplink transmit power cannot be higher than this upper limit value, for example, the transmit power cannot exceed 20db, or it can be a range, for example: 10db-20db.

[0125] The power dynamic range mentioned above includes at least one of: a dynamic range of power spectral density (PSD), the unit of which is dBm / hz and or a dynamic range of power factor ratio (EPRE), the unit of which is dBm.

[0126] Optionally, the above power range may also be a specific value, such as 20db.

[0127] For example: when the first node schedules the second node to send signaling or data in the downlink time slot of the second node, the first node can measure the reference signal of the second node, such as the synchronization signal SSB, the channel state information reference signal CSI-RS, etc., to obtain the dynamic range of PSD or EPRE, for example: ±10dbm, or the range {-10db,…,+10db}, or 20db.

[0128] S704: The first node sends the transmission power dynamic range of the second node to the second node.

[0129] Further, the first node may report or feedback through downlink control information (Downlink Control Information, DCI) or a control element of a media access control layer (Media Access Control control element, MAC CE) or RRC signaling.

[0130] S706: The second node determines the transmit power according to the obtained transmit power dynamic range.

[0131] The second node determines the transmission power according to the dynamic range of the transmission power and its own pre-configured transmission power.

[0132] Optionally, steps S700-S706 may be replaced by the following process:

[0133] First, the donor base station (IAB donor) or the first node configures a reference value of EPRE / PSD, so that when the second node needs to send data to the first node through a backhaul link using space division multiplexing, the reference value of EPRE / PSD of the backhaul link is equal to the reference value of EPRE / PSD of the access link.

[0134] Secondly, each time spatial division multiplexing transmission is activated, the first node indicates the power dynamic range to the second node, for example, the power difference of the power reference EPRE / PSD.

[0135] The power dynamic range may be notified to the second node via DCI during each scheduling, or may be indicated to the second node via MAC CE.

[0136] S708: The second node sends a signal with the determined transmission power.

[0137] In the solution of this embodiment, the relay node measures and then feeds back the uplink power dynamic range, thereby determining the uplink transmission power, so that when the relay node sends data by spatial division, the transmission power can be reasonably controlled, thereby reducing the interference effect on other links.

[0138] The present invention also provides another embodiment, which can be Figure 6 The corresponding embodiments and Figure 7 The power control methods of the corresponding embodiments are combined to calculate the power of the backhaul link and the access link of the relay node.

[0139] For example, Figure 5 For example, through Figure 6 The method flow calculates the second node as a terminal device, the transmission power between the second node and the first node, by Figure 7 The corresponding method calculates the transmission power of the access link of the second node as a base station and the second node provides services to the terminal device. Figure 6 The method flow calculation provided by the corresponding embodiment Figure 5 The power of the backhaul link and access link of the second node in the Figure 7 The corresponding embodiment provides a method for calculating Figure 5 The transmission power of the backhaul link and the access link of the second node in the transmission power of the backhaul link of the second node, or the transmission power of the backhaul link of the second node Figure 7 The corresponding method is used to calculate the transmission power of the access link. Figure 6 The calculation is performed according to the method flow provided in the corresponding embodiment. Please refer to the description of the above specific embodiment for details, which will not be repeated here.

[0140] The above combination Figures 1 to 7 The power control method according to the embodiment of the present application is described in detail. The power control device according to the embodiment of the present application will be described below in conjunction with the figure. It should be understood that the technical features described in the method embodiment are also applicable to the following device embodiment.

[0141] Figure 8 A schematic block diagram of a power control device according to an embodiment of the present application is shown. The device is used to execute the method executed by the second node in the above method embodiment. Optionally, the specific form of the device can be a relay node or a chip in a relay node, or it can be a terminal device or a chip in a terminal device. This embodiment of the present application is not limited to this.

[0142] The device comprises:

[0143] The transceiver unit 802 and the processing unit 804 .

[0144] The transceiver unit 802 is used to receive radio resource control RRC, the RRC including: a power control parameter set of a power control device, the power control parameter set including: a power control index, the power control index is determined according to the transmission mode and / or transmission capability of the power control device; and receive downlink control information DCI, the DCI including: power control index indication information, the power control index indication information is used to indicate the configured power control index value of the uplink transmission.

[0145] The processing unit 804 is configured to determine the transmit power according to the power control index indication information and the power control parameter set.

[0146] Power control means for performing Figure 6 The power control method shown in the figure has the relevant technical features already described above. Figure 6 The illustrated method 600 has been described in detail and thus will not be repeated here.

[0147] Fig. 9 90 is a schematic diagram of the logical structure of another power control device according to an embodiment of the present invention. In a specific implementation process, the power control device may be a network device or a relay device, and the relay device may be a base station. The network device includes a transceiver unit 902 and a processing unit 904. Figure 2-Figure 5 For example, the network device is the first node.

[0148] The transceiver unit 902 is used to send a wireless resource control RRC, wherein the RRC includes: a power control parameter set of a power control device, wherein the power control parameter set includes: a power control index, wherein the power control index is determined according to a transmission mode and / or transmission capability of the power control device; and receive downlink control information DCI, wherein the DCI includes: power control index indication information, wherein the power control index indication information is used to indicate a configured power control index value of an uplink transmission.

[0149] The processing unit 904 is configured to determine the power control parameter set, where the power control parameter set includes: a power control index, and the power control index is determined according to a transmission mode and / or transmission capability of the second node.

[0150] This network device is used to perform Figure 7 The power control method shown, the relevant technical features have been combined above Figure 7 The method shown is described in detail and will not be repeated here.

[0151] Fig.10 FIG. 1 is a schematic diagram of the hardware structure of a network device according to an embodiment of the present invention. Fig.10 As shown, the network device includes a processor 1002, a transceiver 1004, multiple antennas 1006, a memory 1008, an I / O (input / output) interface 1010, and a bus 1012. The transceiver 1004 further includes a transmitter 10042 and a receiver 10044, and the memory 1008 is further used to store instructions 10082 and data 10084. In addition, the processor 1002, the transceiver 1004, the memory 1008, and the I / O interface 1010 are communicatively connected to each other via the bus 1012, and the multiple antennas 1006 are connected to the transceiver 1004.

[0152] The processor 1002 may be a general-purpose processor, such as but not limited to a central processing unit (CPU), or a special-purpose processor, such as but not limited to a digital signal processor (DSP), an application-specific integrated circuit (ASIC), and a field programmable gate array (FPGA). In addition, the processor 1002 may also be a combination of multiple processors. In particular, in the technical solution provided in the embodiment of the present invention, the processor 1002 may be used to execute, for example, the above-mentioned Figure 8 as well as Fig. 9The processor 1002 may be a processor specially designed to perform the above steps and / or operations, or a processor that performs the above steps and / or operations by reading and executing instructions 10082 stored in the memory 1008. The processor 1002 may need to use data 7084 during the execution of the above steps and / or operations.

[0153] The transceiver 1004 includes a transmitter 10042 and a receiver 10044, wherein the transmitter 10042 is used to send a signal through at least one antenna among the multiple antennas 1006. The receiver 10044 is used to receive a signal through at least one antenna among the multiple antennas 1006. In particular, in the technical solution provided in the embodiment of the present invention, the transmitter 10042 can be specifically used to perform the above-mentioned at least one antenna among the multiple antennas 1006. Figure 8 as well as Fig. 9 The operations performed by the transceiver unit in the .

[0154] The memory 1008 may be various types of storage media, such as random access memory (RAM), read only memory (ROM), non-volatile RAM (NVRAM), programmable ROM (PROM), erasable PROM (EPROM), electrically erasable PROM (EEPROM), flash memory, optical memory, and registers. The memory 1008 is specifically used to store instructions 10082 and data 10084. The processor 1002 can perform the above-mentioned steps and / or operations by reading and executing the instructions 10082 stored in the memory 1008. The data 7084 may be used in the process of performing the above-mentioned operations and / or steps.

[0155] The I / O interface 1010 is used to receive instructions and / or data from a peripheral device, and output instructions and / or data to the peripheral device.

[0156] It should be noted that in the specific implementation process, the network device may also include other hardware components, which are not listed one by one in this article.

[0157] The hardware structure diagram of the above network equipment can be Figure 8 or Fig. 9 Hardware structure diagram of network equipment.

[0158] The technical solution provided by the embodiment of the present invention can be implemented in the form of a processor + transceiver, wherein the processor is used to perform various processing operations, such as but not limited to generating, determining, judging, searching, extracting, acquiring, reading, receiving input data to be processed and outputting processed data, and the transceiver is used to perform operations such as transmitting and receiving. In the specific implementation process, the processor can be implemented in the following ways:

[0159] In the first mode, the processor is a dedicated processor. In this case, the processor may further include an interface circuit and a processing circuit, wherein the interface circuit is used to receive data that needs to be processed by the processing circuit and output the processing results of the processing circuit, and the processing circuit is used to perform the above-mentioned various processing operations.

[0160] In the second way, the processor is implemented using a general-purpose processor + memory architecture, wherein the general-purpose processor is used to execute processing instructions stored in the memory, and these processing instructions are used to instruct the general-purpose processor to perform the above-mentioned various processing operations. It is not difficult to understand that the processing performed by the general-purpose processor depends on the processing instructions stored in the memory, and by modifying the processing instructions in the memory, the general-purpose processor can be controlled to output different processing results.

[0161] Further, in the second embodiment, the general processor and the memory can be integrated on the same chip, for example, the general processor and the memory can be integrated on a processing chip. In addition, the general processor and the memory can also be arranged on different chips, for example, the general processor is arranged on a processing chip, and the memory is arranged on a storage chip.

[0162] The technical solution provided by the embodiment of the present invention can also be implemented by means of a computer-readable storage medium, wherein the computer-readable storage medium stores processing instructions for implementing the technical solution of the embodiment of the present invention, so as to be read by a general-purpose processing device to complete the technical solution provided by the embodiment of the present invention. The above-mentioned general-purpose processing device should be understood as a processing device including necessary hardware devices such as processors and transceivers, and the operation of these hardware devices depends on the processing instructions stored in the above-mentioned computer-readable storage medium.

[0163] In the above embodiments, it can be implemented in whole or in part by software, hardware, firmware or any combination thereof. When implemented by software, it can 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 process or function described in the embodiment of the present invention is 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 transmitted from one computer-readable storage medium to another computer-readable storage medium. For example, the computer instructions can be transmitted from a website site, computer, server or data center to another website site, computer, server or data center by wired (e.g., coaxial cable, optical fiber, digital subscriber line (DSL)) or wireless (e.g., infrared, wireless, microwave, etc.). The computer-readable storage medium can be any available medium that a computer can access or a data storage device such as a server or data center that includes one or more available media integrated. The available medium can be a magnetic medium (e.g., a floppy disk, a hard disk, a tape), an optical medium (e.g., a DVD), or a semiconductor medium (e.g., a solid-state hard disk Solid State Disk (SSD)), etc.

[0164] In summary, the above are only embodiments of the present invention and are not intended to limit the protection scope of the present invention. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present invention should be included in the protection scope of the present invention.

Claims

1. A power control method, characterized in that: include: The second node sends a reference signal, where the reference signal is used to determine a dynamic range of a transmit power of the second node; The second node receives a transmission power dynamic range of the second node sent by the first node, where the transmission power dynamic range is an adjustment value of the transmission power of the second node, and the second node is an upper node of the first node; the transmission power dynamic range is used for space division multiplexing transmission; the second node is a relay node, and the space division multiplexing transmission is used to realize signal transmission of a backhaul link and an access link; the transmission power dynamic range includes a dynamic range of a power spectrum density and / or a dynamic range of a power factor ratio; The second node determines the transmission power of the signal according to the transmission power dynamic range.

2. The method according to claim 1, characterized in that The transmission power dynamic range is carried in the control element MAC CE of the media access control layer.

3. A power control method, characterized in that: include: The first node determines a transmission power dynamic range of the second node based on a reference signal sent by the second node; The transmit power dynamic range is used for space division multiplexing transmission; The second node is a relay node, and the space division multiplexing transmission is used to realize signal transmission of a backhaul link and an access link; the transmission power dynamic range includes a dynamic range of a power spectrum density and / or a dynamic range of a power factor ratio; The first node sends a transmission power dynamic range of the second node to the second node, where the transmission power dynamic range is an adjustment value of the transmission power of the second node, and the second node is an upper-level node of the first node.

4. The method according to claim 3, characterized in that: The transmission power dynamic range is carried in the control element MAC CE of the media access control layer.

5. A power control device, characterized in that: include: a transceiver unit, configured to send a reference signal, wherein the reference signal is used to determine a dynamic range of a transmit power of the device; The transmission power dynamic range is used for space division multiplexing transmission; the device is a relay node, and the space division multiplexing transmission is used to realize signal transmission of a backhaul link and an access link; the transmission power dynamic range includes a dynamic range of a power spectrum density and / or a dynamic range of a power factor ratio; The transceiver unit is further used to receive a transmission power dynamic range of the device sent by the first node, where the transmission power dynamic range is an adjustment value of the transmission power of the device, and the device is an upper node of the first node; The processing unit is used to determine the transmission power of the signal according to the transmission power dynamic range.

6. The device according to claim 5, characterized in that The transmission power dynamic range is carried in the control element MAC CE of the media access control layer.

7. A power control device, characterized in that: include: a processing unit, configured to determine a transmit power dynamic range of the second node based on a reference signal sent by the second node; The transmit power dynamic range is used for space division multiplexing transmission; The second node is a relay node, and the space division multiplexing transmission is used to realize signal transmission of a backhaul link and an access link; the transmission power dynamic range includes a dynamic range of a power spectrum density and / or a dynamic range of a power factor ratio; The transceiver unit is used to send the dynamic range of the transmission power of the second node to the second node, where the dynamic range of the transmission power is the adjustment value of the transmission power of the second node, and the second node is the upper node of the device.

8. The device according to claim 7, characterized in that The transmission power dynamic range is carried in the control element MAC CE of the media access control layer.

9. A power control device, characterized in that: include: Memory, used to store computer programs or instructions; A processor, configured to execute the computer program or instructions stored in the memory; when the computer program or instructions are executed, the processor is configured to execute the method according to any one of claims 1 to 4.

10. A chip, characterized in that: The method comprises a processor, wherein the processor is configured to execute a computer program or instruction in a memory, so that the processor executes the method according to any one of claims 1 to 4.

11. A power control method, characterized in that: include: The second node sends a reference signal; The first node determines a transmission power dynamic range of the second node based on a reference signal sent by the second node; The transmission power dynamic range is used for space division multiplexing transmission; the second node is a relay node, and the space division multiplexing transmission is used to realize signal transmission of a backhaul link and an access link; the transmission power dynamic range includes a dynamic range of a power spectrum density and / or a dynamic range of a power factor ratio; The first node sends a transmit power dynamic range of the second node to the second node; The second node determines the transmission power of the signal according to the transmission power dynamic range; wherein the second node is an upper-level node of the first node.

12. The method according to claim 11, characterized in that The transmission power dynamic range is carried in the control element MAC CE of the media access control layer.

13. A communication system, characterized in that: The communication system comprises the apparatus according to claim 5 or 6, and the apparatus according to claim 7 or 8.

14. A computer program product, comprising computer program code, characterized in that: When the computer program code is run on a computer, the method according to any one of claims 1 to 4, 11 or 12 is executed.

15. A computer-readable storage medium, characterized in that: Instructions are stored thereon, and when the instructions are executed on a computer, the computer is caused to execute the method according to any one of claims 1-4, 11 or 12.

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