Message retransmission method and related device

Abstract

The present application provides a message retransmission method and related apparatus. The message retransmission method includes: a user device sends a message 1 to a network device at a first power through a first spatial domain filter; the user device retransmits the message 1 to the network device through N second spatial domain filters, wherein the second power increase number corresponding to the transmission power of each second spatial domain filter in the P second spatial domain filters is greater than the first power increase number corresponding to the first power; the N second spatial domain filters include at least one spatial domain filter that is different from the first spatial domain filter, wherein N and P are both positive integers, and P≤N.

Description

Technical Field

[0001] The present application relates to the field of wireless communication technology, and in particular to a message retransmission method and related devices. Background Art

[0002] In 5G New Radio (NR) wireless communication technology, the carrier frequency used for communication is relatively high (i.e., high frequency), for example, carrier frequencies exceeding 3 GHz or 6 GHz. The higher the carrier frequency, the greater the loss incurred by wireless signals during transmission (known as path loss). To address this, new antenna technologies with higher antenna gain are being adopted to increase the distance and efficiency of signal transmission.

[0003] However, when wireless signals are transmitted through a medium, the propagation medium attenuates the wireless signal while also absorbing energy from it, causing changes in the medium's physical properties, such as an increase in temperature. In particular, when wireless signals pass through living organisms, if the energy or energy density of the wireless signals is too high, it can affect biological characteristics. In view of this, regulatory agencies have established safety standards for electromagnetic propagation, limiting user equipment (UE) maximum allowable transmit power, total radiated power (TRP), equivalent isotropic radiated power (EIRP), and other restrictions. Indicators such as EIRP, maximum allowable transmit power, and total radiated power (TRP) are collectively referred to as maximum permissive exposure (MPE).

[0004] In actual communications, the human body is often in close proximity to the UE, significantly limiting the MPE. Even if the UE can support a higher EIRP, safety regulations dictate that it must transmit signals at a lower EIRP. For example, when a UE accesses a network and transmits messages to network equipment, it must do so at a power level that meets the MPE constraints. This severely limits the UE's output power, easily leading to signal transmission failures, network access failure, or significant access latency. Summary of the Invention

[0005] The present application provides a message retransmission method and related devices, which can improve the transmission power of user equipment.

[0006] In a first aspect, the present application provides a message retransmission method, comprising: a user device sends a first message to a network device at a first power through a first spatial domain filter; and the user device retransmits the first message to the network device through N second spatial domain filters.

[0007] The first message is a message sent by the user equipment to the network device during the random access process. The first message is message 1, message 3, or a physical uplink control channel (PUCCH). When the user equipment confirms that the first message needs to be retransmitted, such as when the first message fails to be sent or when random access fails, the user equipment retransmits the first message to the network device using N second spatial domain filters.

[0008] A second spatial domain filter may correspond to one beam direction, and a second spatial domain filter may also correspond to multiple beam directions. The user device may retransmit the first message to the network device in n different beam directions through N second spatial domain filters, where n is a positive integer greater than or equal to 2, and n≥N. The N second spatial domain filters include at least one spatial domain filter that is different from the first spatial domain filter; or the n beam directions include at least one beam direction that is different from the beam direction corresponding to the first spatial domain filter. In this way, when the first message fails to be sent or random access fails, the user device switches to retransmitting the first message in multiple beam directions, which helps to increase the total transmission power of the first message, thereby increasing the probability of successful transmission of the first message, so that the user device can access the network more quickly.

[0009] Among the N second spatial domain filters, one second spatial domain filter is the same as the first spatial domain filter; or among the n beam directions, one beam direction is the same as the beam direction used by the first spatial domain filter to send the first message. In this way, the beam direction corresponding to the first spatial domain filter may be the beam direction with the highest efficiency and the lowest path loss. Then, the user equipment can continue to retransmit the first message in this beam direction, thereby improving the reception power of the first message at the network device.

[0010] Alternatively, any second spatial domain filter among the N second spatial domain filters is different from the first spatial domain filter, or any beam direction among the n beam directions is different from the beam direction in which the first message is sent by the first spatial domain filter. In this way, the user equipment can attempt to retransmit the first message to the network device in more beam directions, thereby helping to increase the probability of successful transmission of the first message.

[0011] In some implementations, N is 1, and n>N. That is, the user equipment retransmits the first message to the network device in n different beam directions through a second spatial domain filter. The second spatial domain filter corresponds to n beam directions.

[0012] In some other implementations, N>1, n>N. Among the N second spatial domain filters, at least one second spatial domain filter retransmits the first message to the network device in multiple different beam directions. That is, among the N second spatial domain filters, at least one second spatial domain filter corresponds to multiple beam directions.

[0013] In some further implementations, N ≥ 2, N = n. Each of the N second spatial domain filters corresponds to a beam direction, and each of the N second spatial domain filters transmits the first message in a different beam direction. The user equipment retransmits the first message to the network device using the N second spatial domain filters in different N beam directions.

[0014] Furthermore, if the user equipment still fails to send the first message after retransmitting the first message to the network device through N second spatial domain filters, the user equipment may retransmit the first message again.

[0015] In some embodiments, the first message is message 1, the number of second power increases corresponding to the transmission power of each of P second spatial domain filters out of N second spatial domain filters is greater than the number of first power increases corresponding to the first power; P is a positive integer, P≤N.

[0016] In the above solution, when message 1 fails to be sent or random access fails, the user equipment switches to retransmitting message 1 in n beam directions and performs power boosting in the beam directions corresponding to P second spatial domain filters in the n beam directions. This can increase the transmit power of each of the P second spatial domain filters. This helps to increase the total power of the N second spatial domain filters, thereby increasing the probability of successful transmission of message 1.

[0017] Optionally, if the user equipment fails to retransmit message 1, the user equipment may retransmit message 1 again, retransmitting message 1 through N' third spatial domain filters, where N' ≥ N. These N' third spatial domain filters may not perform power boosting, that is, the number of power boosts corresponding to the transmit power of these N' third spatial domain filters is equal to the second power boosting number.

[0018] Based on the above-mentioned implementation method in which the first message is message 1, in some implementation methods, the first power is determined based on the first power increase step and the first power increase number; the transmission power of each second spatial domain filter in the P second spatial domain filters is determined based on the second power increase step and the second power increase number corresponding to the transmission power of the second spatial domain filter.

[0019] Optionally, the second power boost step size is determined based on the first power boost step size. In this way, the network device only needs to configure one power boost step size as the first power boost step size, which can save wireless transmission resources. Furthermore, the user equipment only needs to calculate the second power boost step size once for the P second spatial domain filters, which can reduce the data processing load of the user equipment.

[0020] Optionally, P ≥ 2, and the second power increase step size a of the second spatial domain filter A in the P second spatial domain filters is determined based on configuration information sent by the network device. Among the P second spatial domain filters, the second power increase step sizes of the second spatial domain filters other than the second spatial domain filter A are determined based on the second power increase step size a. In this way, the network device can better control the transmit power of the user equipment by configuring the second power increase step sizes in the P second spatial domain filters, where the second spatial domain filter A is any one of the P second spatial domain filters.

[0021] Furthermore, before the user equipment retransmits message 1 to the network device through N second spatial domain filters, the method further includes: the user equipment obtains a path loss measurement value of each second spatial domain filter in the P second spatial domain filters; the path loss measurement value of each second spatial domain filter in the P second spatial domain filters is used to determine a path loss value of each second spatial domain filter in the P second spatial domain filters, and the path loss value of each second spatial domain filter in the P second spatial domain filters is used to determine the transmit power of the second spatial domain filter for retransmitting the first message;

[0022] The path loss values of the P second spatial domain filters are the same, and the path loss value is determined by the user equipment based on the path loss measurement values of the P second spatial domain filters. The second path loss value obtained in this way takes into account the path loss measurement value of each second spatial domain filter in the P second spatial domain filters, and the transmit power determined according to the second path loss value is more reasonable; or

[0023] The path loss values of the P second spatial domain filters are different, and the path loss value of each of the P second spatial domain filters is determined based on the path loss measurement value of the second spatial domain filter. In this way, the second path loss value used to calculate the transmit power of each second spatial domain filter can accurately reflect the path loss corresponding to the second spatial domain filter, thereby making the transmit power calculated by the user equipment more accurate.

[0024] Optionally, the path loss values of the P second spatial domain filters are the same, and the path loss value is the minimum value among the path loss measurement values of the P second spatial domain filters; or the path loss value is any path loss measurement value among the P second spatial domain filters that is less than a path loss threshold. This can appropriately prevent the UE's transmit power from being too high and reduce interference to the network caused by the UE sending uplink messages.

[0025] In some embodiments, the first message is message 3, and the second cumulative power adjustment corresponding to each of P of the N second spatial domain filters is different from the first cumulative power adjustment corresponding to the first spatial domain filter. Thus, when the user equipment switches from sending message 3 in one beam direction to sending message 3 in n beam directions, the user equipment adjusts the cumulative power adjustment values of the P second spatial domain filters to adjust the transmit power in the beam directions corresponding to the P second spatial domain filters, thereby increasing the power in the beam directions corresponding to the P second spatial domain filters. This helps to increase the total power of the N second spatial domain filters, thereby increasing the probability of successful transmission of message 3.

[0026] In some embodiments, the first message is a PUCCH, and the second cumulative power adjustment corresponding to each of the P second spatial domain filters in the N second spatial domain filters is different from the first cumulative power adjustment corresponding to the first spatial domain filter. Thus, when the user equipment switches from transmitting PUCCH in one beam direction to transmitting PUCCH in n beam directions, the user equipment adjusts the cumulative power adjustment values of the P second spatial domain filters to adjust the transmit power in the beam directions corresponding to the P second spatial domain filters, thereby increasing the power in the beam directions corresponding to the P second spatial domain filters. This helps to increase the total power of the N second spatial domain filters, thereby increasing the probability of successful PUCCH transmission.

[0027] In certain embodiments, N ≥ 2; among the N second spatial domain filters, at least two of the second spatial domain filters transmit first messages associated with different synchronization signals; or among the N second spatial domain filters, at least two of the second spatial domain filters transmit first messages associated with different physical broadcast channel blocks; or among the N second spatial domain filters, at least two of the second spatial domain filters transmit first messages associated with different channel state information reference signal resources. This can increase the coverage of the first message and improve the probability of successful transmission of the first message. The first message is Message 1, Message 3, or PUCCH.

[0028] In certain embodiments, before the user equipment retransmits the first message to the network device through N second spatial domain filters, the method further includes: the user equipment confirming that the transmit power of the retransmitted first message through the first spatial domain filter exceeds the power threshold corresponding to the maximum allowable exposure, and the power threshold is less than or equal to the maximum power corresponding to the maximum allowable exposure. In this way, when the first power is about to exceed or has exceeded the maximum power corresponding to the maximum allowable exposure, the user equipment switches to retransmitting the first message to the network device in multiple beam directions, so that the total transmit power of the first message sent by the user equipment is greater than the first power, thereby enabling the transmit power of the user equipment to exceed the maximum power limit corresponding to the maximum allowable exposure, thereby increasing the probability of successful transmission of the first message, and thus accelerating the user equipment's access to the network. The first message is message 1, message 3, or PUCCH.

[0029] In a second aspect, the present application provides a message retransmission device, comprising a transceiver unit and a processing unit, wherein the transceiver unit is configured to: send a first message to a network device at a first power through a first spatial domain filter; and retransmit the first message to the network device through N second spatial domain filters, wherein the N second spatial domain filters include at least one spatial domain filter that is different from the first spatial domain filter, and N is a positive integer. The first message is a message sent by a user device to a network device during a random access process. The first message is message 1, message 3, or PUCCH. In this way, when the first message fails to be sent or random access fails, the user device switches to retransmitting the first message in multiple beam directions, which helps to increase the total transmission power of the first message, thereby increasing the probability of successful transmission of the first message.

[0030] In some embodiments, the first message is message 1, the number of second power increases corresponding to the transmission power of each of P second spatial domain filters out of N second spatial domain filters is greater than the number of first power increases corresponding to the first power; P is a positive integer, P≤N.

[0031] In the above solution, when message 1 fails to be sent or random access fails, message 1 is retransmitted in n beam directions, and power is boosted in the beam directions corresponding to P second spatial filters in the n beam directions. This increases the transmit power of each of the P second spatial filters. This helps to increase the total power of the N second spatial filters, thereby increasing the probability of successful message 1 transmission.

[0032] The message retransmission device in this embodiment may be, for example, a user equipment, or a chip or functional module of the user equipment.

[0033] Optionally, the transceiver unit includes a receiving unit and a sending unit. In one design, the message retransmission device is a communication chip, and the transceiver unit can be an input / output circuit or port of the communication chip.

[0034] In another design, the transceiver unit may be a transmitter and a receiver.

[0035] Based on the above-mentioned implementation method in which the first message is message 1, in some implementation methods, the first power is determined by the processing unit based on the first power increase step and the first power increase number; the transmission power of each second spatial domain filter in the P second spatial domain filters is determined by the processing unit based on the second power increase step and the second power increase number corresponding to the transmission power of the second spatial domain filter.

[0036] Optionally, the second power boost step size is determined by the processing unit based on the first power boost step size. In this way, the network device only needs to configure one power boost step size as the first power boost step size, which can save wireless transmission resources. Furthermore, the user equipment only needs to calculate the second power boost step size once for the P second spatial domain filters, which can reduce the data processing load of the user equipment.

[0037] Optionally, P ≥ 2, and the second power increase step size a of the second spatial domain filter A among the P second spatial domain filters is determined by the processing unit based on configuration information sent by the network device. Among the P second spatial domain filters, the second power increase step sizes of the second spatial domain filters other than the second spatial domain filter A are determined by the processing unit based on the second power increase step size a. In this way, the network device can better control the transmit power of the user device by configuring the second power increase step sizes in the P second spatial domain filters, where the second spatial domain filter A is any one of the P second spatial domain filters.

[0038] Further, the processing unit is used to obtain a path loss measurement value of each second spatial domain filter in the P second spatial domain filters; the path loss measurement value of each second spatial domain filter in the P second spatial domain filters is used to determine the path loss value of each second spatial domain filter in the P second spatial domain filters, and the path loss value of each second spatial domain filter in the P second spatial domain filters is used to determine the transmit power of the second spatial domain filter for retransmitting the first message;

[0039] The path loss values of the P second spatial domain filters are the same, and the path loss value is determined by the processing unit based on the path loss measurement values of the P second spatial domain filters. The second path loss value obtained in this way takes into account the path loss measurement value of each second spatial domain filter in the P second spatial domain filters, and the transmit power determined according to the second path loss value is more reasonable; or

[0040] The path loss values of the P second spatial domain filters are different. The path loss value of each of the P second spatial domain filters is determined by the processing unit based on the path loss measurement value of the second spatial domain filter. In this way, the second path loss value used to calculate the transmit power of each second spatial domain filter can accurately reflect the path loss corresponding to the second spatial domain filter, thereby making the transmit power calculated by the user equipment more accurate.

[0041] Optionally, the path loss values of the P second spatial domain filters are the same, and the path loss value is the minimum value among the path loss measurement values of the P second spatial domain filters; or the path loss value is any path loss measurement value among the P second spatial domain filters that is less than a path loss threshold. This can balance the interference introduced to the network.

[0042] In some embodiments, the first message is message 3, and the second cumulative power adjustment corresponding to each of P of the N second spatial domain filters is different from the first cumulative power adjustment corresponding to the first spatial domain filter. Thus, when the user equipment switches from sending message 3 in one beam direction to sending message 3 in n beam directions, the user equipment adjusts the cumulative power adjustment values of the P second spatial domain filters to adjust the transmit power in the beam directions corresponding to the P second spatial domain filters, thereby increasing the power in the beam directions corresponding to the P second spatial domain filters. This helps to increase the total power of the N second spatial domain filters, thereby increasing the probability of successful transmission of message 3.

[0043] In some embodiments, the first message is a physical uplink control channel (PUCCH), and the second cumulative power adjustment corresponding to each of the P second spatial domain filters in the N second spatial domain filters is different from the first cumulative power adjustment corresponding to the first spatial domain filter. In this way, when the user equipment switches from transmitting PUCCH in one beam direction to transmitting PUCCH in n beam directions, the user equipment adjusts the cumulative power adjustment values of the P second spatial domain filters to adjust the transmit power of the beam directions corresponding to the P second spatial domain filters, thereby achieving power boosting for the beam directions corresponding to the P second spatial domain filters. This helps to increase the total power of the N second spatial domain filters, thereby increasing the probability of successful PUCCH transmission.

[0044] In certain embodiments, N ≥ 2; among the N second spatial domain filters, at least two of the second spatial domain filters transmit first messages associated with different synchronization signals; or among the N second spatial domain filters, at least two of the second spatial domain filters transmit first messages associated with different physical broadcast channel blocks; or among the N second spatial domain filters, at least two of the second spatial domain filters transmit first messages associated with different channel state information reference signal resources. This can increase the coverage of the first message and improve the probability of successful transmission of the first message. The first message is Message 1, Message 3, or PUCCH.

[0045] In certain embodiments, the processing unit is further configured to: confirm that the transmit power of the retransmitted first message through the first spatial domain filtering exceeds a power threshold corresponding to the maximum allowable exposure, and that the power threshold is less than or equal to the maximum power corresponding to the maximum allowable exposure. Thus, when the first power is about to exceed or has exceeded the maximum power corresponding to the maximum allowable exposure, the user equipment switches to retransmitting the first message to the network device along multiple beam directions, such that the total transmit power of the first message sent by the user equipment exceeds the first power, thereby enabling the transmit power to exceed the maximum power limit corresponding to the maximum allowable exposure, thereby increasing the probability of successful transmission of the first message and accelerating the user equipment's access to the network. The first message is message 1, message 3, or PUCCH.

[0046] It should be noted that the supplementary description of the message retransmission method of each implementation method of the above-mentioned first aspect is also applicable to the message retransmission device of each implementation method of the above-mentioned second aspect. To avoid redundancy, it will not be repeated here.

[0047] In a third aspect, the present application provides a communication device, which is a user device or a terminal device, including a processor and a memory, the memory being used to store computer instructions, and the processor executing the computer program or instructions in the memory so that the method of any embodiment of the above-mentioned first aspect is executed.

[0048] In a fourth aspect, the present application further provides a communication device, comprising a processor, a memory, and a transceiver, wherein the transceiver is configured to receive or transmit signals; the memory is configured to store program code; and the processor is configured to call the program code from the memory to execute the method of the first aspect. The memory is configured to store computer programs or instructions, and the processor is configured to call and execute the computer programs or instructions from the memory. When the processor executes the computer programs or instructions in the memory, the communication device executes any one of the implementations of the message retransmission method of the first aspect.

[0049] Optionally, there are one or more processors and one or more memories.

[0050] Optionally, the memory may be integrated with the processor, or the memory may be provided separately from the processor.

[0051] Optionally, the transceiver may include a transmitter (transmitter) and a receiver (receiver).

[0052] In a fifth aspect, the present application provides an apparatus comprising a processor coupled to a memory, wherein when the processor executes a computer program or instruction in the memory, the method of any embodiment of the first aspect is performed. Optionally, the apparatus further comprises a memory. Optionally, the apparatus further comprises a communication interface coupled to the processor.

[0053] In one implementation, the apparatus is a user equipment. When the communication device is a user equipment, the communication interface may be a transceiver or an input / output interface. Alternatively, the transceiver may be a transceiver circuit. Alternatively, the input / output interface may be an input / output circuit.

[0054] In another implementation, the device is a chip or a chip system. When the device is a chip or a chip system, the communication interface can be an input / output interface, interface circuit, output circuit, input circuit, pin, or related circuit on the chip or chip system. The processor can also be embodied as a processing circuit or a logic circuit.

[0055] In a sixth aspect, the present application provides a communication device, which includes a processor and an interface circuit, the interface circuit being used to receive code instructions and transmit them to the processor; the processor runs the code instructions to execute the corresponding method shown in the first aspect.

[0056] In a seventh aspect, the present application provides a system, which includes the above-mentioned user equipment and network equipment.

[0057] In an eighth aspect, the present application provides a computer program product, which includes: a computer program (also referred to as code, or instructions), which, when executed, enables a computer to execute a method in any possible implementation of the first aspect.

[0058] In a ninth aspect, the present application provides a computer-readable storage medium, which stores a computer program (also referred to as code, or instructions) which, when run on a computer, enables the computer to execute the method in any possible implementation of the first aspect above.

[0059] In a tenth aspect, the present application provides a communication device comprising: an input circuit, an output circuit, and a processing circuit. The processing circuit is configured to receive a signal through the input circuit and transmit a signal through the output circuit, so that the method in any possible implementation of the first aspect is implemented.

[0060] In a specific implementation, the communication device may be a chip, the input circuit may be an input pin, the output circuit may be an output pin, and the processing circuit may be a transistor, a gate circuit, a trigger, or various logic circuits. The input signal received by the input circuit may be, for example, but not limited to, received and input by a receiver, and the signal output by the output circuit may be, for example, but not limited to, output to and transmitted by a transmitter. The input circuit and the output circuit may be the same circuit, which functions as an input circuit and an output circuit at different times. This application does not limit the specific implementation of the processing circuit and various circuits.

[0061] In the eleventh aspect, the present application also provides a chip, comprising: a processor and an interface, for executing a computer program or instruction stored in a memory, and executing the message retransmission method of any of the above-mentioned embodiments. BRIEF DESCRIPTION OF THE DRAWINGS

[0062] In order to more clearly illustrate the embodiments of the present application or the technical solutions in the prior art, the following briefly introduces the drawings required for use in the embodiments.

[0063] Figure 1 A network architecture diagram of a network system involved in an embodiment of the present application;

[0064] Figure 2 This is a flowchart of the UE random access process for this application;

[0065] Figure 3A Schematic diagram of the scenario during UE random access;

[0066] Figure 3B A schematic diagram of a scenario involved in the message retransmission method according to an embodiment of the present application;

[0067] Figure 4 Schematic diagram of the flow of the message retransmission method according to an embodiment of the present application;

[0068] Figure 5A This is a schematic structural diagram of a communication device according to an embodiment of the present application;

[0069] Figure 5B This is a schematic diagram of another scenario involved in the message retransmission method according to an embodiment of the present application;

[0070] Figure 5C This is another schematic diagram of a scenario involved in the message retransmission method according to an embodiment of the present application;

[0071] Figure 6 This is another flowchart of the message retransmission method according to an embodiment of the present application;

[0072] Figure 7 This is a module diagram of the message retransmission device according to an embodiment of the present application. DETAILED DESCRIPTION

[0073] The following will clearly and thoroughly describe the technical solutions in the embodiments of the present application in conjunction with the accompanying drawings. In the description of the embodiments of the present application, unless otherwise specified, " / " means or, for example, A / B can mean A or B; "and / or" in the text is merely a description of the association relationship of associated objects, indicating that three relationships can exist, for example, A and / or B can mean: A exists alone, A and B exist at the same time, and B exists alone. In addition, in the description of the embodiments of the present application, "multiple" means two or more than two.

[0074] In the following, the terms "first" and "second" are used for descriptive purposes only and should not be understood as suggesting or implying relative importance or implicitly indicating the number of the technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of the features. In the description of the embodiments of this application, unless otherwise specified, "multiple" means two or more.

[0075] See Figure 1 , Figure 1 A network architecture diagram of the network system 100 provided in an embodiment of the present application.

[0076] The network system includes a network device 10 and a UE 20 .

[0077] The network device 10 is a device that communicates with a wireless user equipment through one or more cells in an access network. The network device can be, for example, an evolved base station (NodeB or eNB or e-NodeB, evolutionary NodeB) in a long term evolution (LTE) system or an advanced long term evolution (LTE-A), or can also include a new air interface network device gNB in a fifth generation mobile communication technology (5G) NR system.

[0078] UE20 may be a device that provides voice and / or data connectivity to a user, and may include, for example, a handheld device with wireless connection capabilities, or a processing device connected to a wireless modem. The user equipment may communicate with a core network via a radio access network (RAN) and exchange voice and / or data with the RAN. UE20 may include a wireless user device, a mobile user device, a device-to-device (D2D) user device, a vehicle-to-everything (V2X) user device, a machine-to-machine / machine-type communications (M2M / MTC) user device, an Internet of Things (IoT) user device, a subscriber unit, a subscriber station, a mobile station, a remote station, an access point (AP), a remote terminal, an access terminal, a user terminal, a user agent, or a user device. For example, it may include mobile phones (or "cellular" phones), computers with mobile user equipment, portable, pocket-sized, handheld, or computer-built mobile devices, etc. For example, personal communication service (PCS) phones, cordless phones, session initiation protocol (SIP) phones, wireless local loop (WLL) stations, personal digital assistants (PDAs), and other devices. It also includes limited devices, such as devices with low power consumption, limited storage capacity, or limited computing power. For example, it includes information sensing devices such as barcodes, radio frequency identification (RFID), sensors, global positioning systems (GPS), laser scanners, etc.

[0079] As an example and not a limitation, in the embodiment of the present application, the UE20 can also be a wearable device. Wearable devices can also be called wearable smart devices or smart wearable devices, etc., which are a general term for the application of wearable technology to intelligently design and develop wearable devices 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 achieve powerful functions through software support, data interaction, and cloud interaction. Broadly speaking, wearable smart devices include full-featured, large-sized, and independent of smartphones to achieve complete or partial functions, such as smart watches or smart glasses, etc., as well as those 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 smart bracelets, smart helmets, smart jewelry, etc. for vital sign monitoring.

[0080] The various user devices introduced above, if located on a vehicle (for example, placed inside or installed inside a vehicle), can be considered as on-board user devices. On-board user devices are also called on-board units (OBUs), and the application embodiments do not limit this.

[0081] Random access (RA) refers to the information exchange mechanism or process by which a non-connected device (such as a user equipment terminal) establishes a connection with the network in an LTE or 5G access-controlled communication system. Random access is categorized into contention-based random access and non-contention-based random access.

[0082] Contention-based random access typically consists of four steps, each corresponding to a message: message 1 (Msg1), message 2 (Msg2), message 3 (Msg3), and message 4 (Msg4). Each message carries different signaling or information. Non-contention-based random access only has the first two steps.

[0083] See also Figure 2 , Figure 2 FIG. 1 is a flow chart of a random access procedure for a UE. The random access procedure for a UE includes the following steps:

[0084] S202. The UE sends message 1 to the network device.

[0085] S204. The network device sends message 2 to the UE.

[0086] S206. The UE sends message 3 to the network device.

[0087] S208. The network device sends message 4 to the UE.

[0088] Specifically, Message 1 is a random access preamble (or sequence). Message 1 is carried over the physical random access channel (PRACH). Message 1 is used by a device (e.g., a UE) to initiate a connection request, handover request, synchronization request, or scheduling request to a network device.

[0089] Message 2 is a random access response (RAR) message. Message 2 is the network device's response to Message 1. Message 2 includes at least one of the following information: the Message 1 index (random access preamble identity, RAPID), uplink scheduling grant (uplink grant), timing advance (timing advance), temporary cell radio network temporary identity (TC-RNTI), etc. Specifically, the network device can respond to multiple Msg1s simultaneously in the same Message 2.

[0090] Message 3 is also called the first uplink scheduling transmission. Message 3 is transmitted based on the UL grant scheduling in message 2, or is a retransmission scheduled based on the downlink control information (DCI) encrypted by TC-RNTI. The transmission content of message 3 is a high-level message, for example, it can be a connection establishment request message. The connection establishment request message can specifically be the identification information of the user initiating the connection request. Message 3 is used to resolve contention. If multiple different devices use the same message 1 for random access, messages 3 and 4 can be used to jointly determine whether there is a conflict between these multiple different devices.

[0091] Message 4 is used for contention resolution. Message 4 typically contains the common control channel service data unit (CCCH SDU) carried in Msg3. If a network device detects its own CCCH SDU in Message 4, it considers the contention random access successful and continues with the next communication process.

[0092] To reduce the access time of contention-based random access, a two-step random access solution is available. This two-step random access solution requires the use of Message A and Message B. Message A includes the random access preamble and the first data information (e.g., similar to Message 1 and Message 3 described above, respectively), while Message B includes contention resolution and uplink scheduling (e.g., similar to Message 2 and Message 4 in the four-step contention-based random access described above).

[0093] Furthermore, when the UE successfully receives the message 4, it may send a physical uplink control channel (PUCCH) to the network device to provide feedback on whether the message 4 is successfully received.

[0094] Transmit power is the output power measured over all or part of the supported frequencies, frequency bands, or bandwidths over a given time or period. For example, the measurement period is at least 1ms. Another example is the measurement period is at least one time slot corresponding to a sub-carrier interval.

[0095] However, the UE's transmit power is limited by the MPE, resulting in a limited UE transmit power. Figure 3A As shown, Figure 3A This is a schematic diagram of the scenario during the UE random access process. Figure 3A In the figure, the dashed beam of UE 31 represents the UE's maximum transmit power under MPE constraints. Therefore, when UE 31 sends Message 1, Message 3, or the PUCCH to network device 32 under MPE constraints, it is likely to fail. This will require multiple retransmissions, significantly impacting UE access time.

[0096] In particular, for certain carrier frequency positions, the UE's MPE constraint also includes equivalent isotropically radiated power (EIRP). For example, when the carrier frequency is greater than 3 GHz, the transmit power constraint may refer to output power, or EIRP, or output power and EIRP (each corresponding to a different constraint value). For example, when the carrier frequency is lower than 3 GHz, the output power does not exceed 23 dBm. For another example, when the carrier frequency is higher than 3 GHz, the output power does not exceed 23 dBm and the EIRP does not exceed 43 dBm. For specific MPE constraint values, please refer to the rules formulated by various countries and regions.

[0097] The "transmit power" mentioned in this application can be output power or EIRP.

[0098] The embodiment of the present application provides a message retransmission method. In the present application, the UE sends a first message at a first power through a first spatial domain filter. During the random access process of the first message, the UE sends a message to the network device. The first message is message 1, message 3 or PUCCH. When the UE fails to send the first message at the first power, the UE retransmits the first message in n beam directions through N spatial domain filters, where N and n are positive integers, n≥2, n≥N. Please refer to Figure 3B , Figure 3B Schematic diagram of the scenario of the message retransmission method of the embodiment of the present application. Figure 3B As shown, UE 31 sends a first message to network device 32 in multiple beam directions. In this way, when the UE fails to transmit the first message, it switches to sending the first message in multiple beam directions, thereby increasing the total transmission power of the UE for sending the first message, thereby increasing the probability of successful transmission of the first message and improving the speed at which the UE accesses the network.

[0099] See also Figure 4 , Figure 4 Schematic diagram of a message retransmission method according to an embodiment of the present application. The message retransmission method includes:

[0100] S401. A UE sends a first message to a network device at a first power through a first spatial domain filter.

[0101] Specifically, the UE sends a first message to the network device in a beam direction through the first spatial domain filtering. The first message is message 1, message 3, or PUCCH.

[0102] The first power is the output power of the UE on all or part of the supported frequencies, frequency bands, or bandwidths within a set time period. The set time period may correspond to a time period greater than or equal to 1 ms, for example, 1 second (s).

[0103] S402: The UE confirms that the first message needs to be retransmitted.

[0104] When the first message is Message 1, after the UE sends the first message, if it monitors the Physical Downlink Control Channel (PDCCH), and if it does not receive a RAR sent by the network device to the UE within a specified RAR window, the UE may confirm that the first message has failed to be sent and that it is necessary to retransmit Message 1. If the UE confirms that random access has failed, the UE may also confirm that it is necessary to retransmit Message 1.

[0105] Specifically, during the random access process, any one or more of the following factors will cause random access failure: the network device fails to detect message 1, the UE fails to receive message 2, the network device fails to detect message 3, the UE fails to detect message 4, and the UE detects that message 4 is sent successfully but the conflict detection fails.

[0106] When the first message is message 3, if the UE confirms that message 3 fails to be sent, the UE confirms that message 3 needs to be retransmitted.

[0107] When the first message is PUCCH, if the UE confirms that the PUCCH transmission fails, the UE confirms that the PUCCH needs to be retransmitted.

[0108] S403. The UE retransmits the first message to the network device through N second spatial domain filters, where N is a positive integer.

[0109] A beam is a communication resource. Beam formation can be achieved through beamforming or other techniques. Beamforming techniques include digital beamforming, analog beamforming, and hybrid digital / analog beamforming. A transmit beam refers to the distribution of signal strength in different spatial directions after a signal is transmitted from an antenna.

[0110] The UE's transmit beam can be divided into multiple beam directions based on the distribution of signal strength in different directions in space after the signal is transmitted through the antenna. Each beam direction can correspond to one or more antenna ports.

[0111] It is understood that one or more antenna ports corresponding to a beam direction can also be considered an antenna port set. Beams in communication protocols can also be embodied as spatial filters. For example, a beam direction of a transmit beam can correspond to a spatial domain transmission filter, or multiple beam directions can correspond to a spatial domain filter.

[0112] The UE may retransmit the first message to the network device in n different beam directions through N second spatial domain filters, where n is a positive integer greater than or equal to 2, and n≥N. One second spatial domain filter corresponds to one or more beam directions.

[0113] In this way, when the first message fails to be sent or random access fails, the user equipment switches to retransmitting the first message in multiple beam directions, which can increase the total transmit power of the first message and thus increase the probability of successful transmission of the first message. For example, by retransmitting the first message in multiple beam directions, the UE can make the sum of the transmit powers of N second spatial domain filters greater than the first power.

[0114] Among the N second spatial domain filters, at least one spatial domain filter is different from the first spatial domain filter; or among the n beam directions, at least one beam direction is different from the beam direction in which the UE sends the first message through the first spatial domain filter.

[0115] Each second spatial filter can be understood as a set of weights, which may include at least one of digital weights F, analog weights G, and hybrid analog-digital weights FG. The UE's antenna retransmits the first message to the network device in n different beam directions using N second spatial filters. This can be understood as the UE's antenna retransmitting the first message to the network device in n different beam directions using N sets of weights. Each set of weights can correspond to one beam direction or multiple beam directions.

[0116] See also Figure 5A , Figure 5A This is a schematic diagram of the structure of a communication device according to an embodiment of the present application. The communication device 500 includes a processor 501, a memory 502, and a transceiver 503. The processor 501 is coupled to the memory 502. The memory 502 is used to store computer instructions. The transceiver 503 includes one or more of a transmitter 5031, a receiver 5032, and an antenna 5033. The transmitter 5031 can be used to send information to a network device via the antenna 5033. The receiver 5032 is used to receive information via the antenna 5033. Optionally, there are one or more processors 501 and one or more memories 502. Optionally, the memory 502 can be integrated with the processor 501, or the memory 502 can be provided separately from the processor 501.

[0117] The message retransmission method of the embodiment of the present application can be implemented by the communication device 500 of the embodiment of the present application. That is, the above steps S401-S403 can be performed by the communication device 500 of the embodiment of the present application. The transceiver 503 is used to perform the operations of sending and receiving in the method embodiment, the processor 501 is used to implement other operations except sending and receiving, and the memory 502 is used to store relevant computer programs or instructions; for example, the processor 501 reads computer instructions from the memory 502 so that the device 500 performs the following operations: the transmitter 5031 sends a first message to the network device at a first power through a first spatial domain filter; the processor 501 confirms that the first message needs to be retransmitted; the transmitter 5031 retransmits the first message to the network device through N second spatial domain filters.

[0118] The communication device 500 in the embodiment of the present application may be, for example, but not limited to, a user equipment, or a chip or functional module in the user equipment.

[0119] Antenna 5033 includes one or more antenna arrays, such as Figure 5AIn the figure, antenna 5033 includes antenna array 1 to antenna array N. An antenna array includes K antenna elements. An antenna array can also be called an antenna panel. An antenna array can send a first message in one beam direction, and an antenna array can also send signals in multiple beam directions. A spatial domain filter can be understood as a digital weight F, analog weight G, or mixed analog-digital weight FG used by an antenna array to form a beam. For example, Figure 5A In the example, antenna array 1 is connected by digital weights [F 1,1 ;…;F 1,K ] forms a beam, then [F 1,1 ;…;F 1,K ] is a spatial filter F1. When an antenna array sends information to a network device in one beam direction, the spatial filter corresponding to the antenna array corresponds to one beam direction; when an antenna array sends information to a network device in multiple beam directions, the spatial filter corresponding to the antenna array corresponds to multiple beam directions.

[0120] In some embodiments, N>1, n>N. Among the N second spatial domain filters, at least one second spatial domain filter retransmits the first message in multiple different beam directions. That is, among the N second spatial domain filters, at least one second spatial domain filter corresponds to multiple beam directions. Figure 5A As shown, antenna array 1 retransmits the first message in beam direction 1 through the second spatial domain filter F1; ...; antenna array N of UE50 retransmits the first message in beam direction 1 through the second spatial domain filter F N , retransmit the first message in beam direction n-1 and beam direction n. Where, F1=[F 1,1 ;…;F 1,K ],……,F N =[F N,1 ;…;F N,K ].

[0121] In some embodiments, N is 1, and n>N. The communication device 500 retransmits the first message in n different beam directions through a second spatial domain filtering. Figure 5B As shown, Figure 5B Schematic diagram of another scenario of the message retransmission method according to an embodiment of the present application. An antenna array of UE500 retransmits the first message in n different beam directions through the second spatial domain filter F, where F=[F1, ..., F k ].

[0122] In some other embodiments, N>1, N=n. The N second spatial domain filters correspond to the N beam directions one by one. The UE retransmits the first message in different N beam directions through the N second spatial domain filters. Figure 5C As shown, Figure 5CSchematic diagram of another scenario of the message retransmission method according to an embodiment of the present application. Antenna array 1 retransmits the first message in beam direction 1 through the second spatial domain filter F1; antenna array 2 retransmits the first message in beam direction 2 through the second spatial domain filter F2, ...; antenna array N of UE500 retransmits the first message in beam direction 2 through the second spatial domain filter F N , retransmit the first message in beam direction N. F1=[F 1,1 ;…;F 1,K ],F1=[F 2,1 ;…;F 2,K ],……,F N =[F N,1 ;…;F N,K ].

[0123] It should be noted that the examples in the above embodiments are only for explanation and do not constitute a limitation to the present application.

[0124] Among the n beam directions, the first message sent by at least two beam directions may be associated with different synchronization signals (SS); or the first message sent by at least two beam directions may be associated with different physical broadcast channel blocks (PBCH blocks); or the first message sent by at least two beam directions may be associated with different channel state information reference signals (CSI-RS). This increases the coverage of the first message and the probability of successful transmission of the first message.

[0125] Optionally, among the n beam directions, the first messages sent in at least two beam directions are associated with the same SS / PBCH block. In this way, the first messages sent in the n beam directions are associated with fewer SS / PBCH blocks, and the network device detects the first message from the associated SS / PBCH block, which facilitates the network device to detect the first message.

[0126] Optionally, the first message sent in n beam directions has the same content. This may allow signals from multiple directions to form quasi-coherent superposition or quasi-coherent superposition in space, thereby increasing the received signal strength and the success probability of the first message.

[0127] In some implementations, one of the N second spatial domain filters is the same as the first spatial domain filter; or one of the n beam directions is the same as the beam direction used by the UE to send the first message through the first spatial domain filter in step S401. In this way, in step S401, the beam direction corresponding to the first spatial domain filter may be the beam direction with the highest efficiency and the lowest path loss. The UE then continues to retransmit the first message in this beam direction, thereby increasing the received power of the first message at the network device.

[0128] In other implementations, any one of the N second spatial domain filters is different from the first spatial domain filter, or any one of the n beam directions is different from the beam direction in which the UE sends the first message through the first spatial domain filter in S401. In this way, the UE can attempt to retransmit the first message to the network device in more beam directions, thereby helping to increase the probability of successful transmission of the first message.

[0129] Furthermore, if the UE still fails to send the first message after retransmitting the first message to the network device through N second spatial domain filters, the UE may retransmit the first message again.

[0130] Specifically, for example, the UE sends a first message to the network device at a first power through a first spatial domain filter. When the UE confirms that the first message has failed to be sent, the UE retransmits the first message to the network device through N1 second spatial domain filters in n1 beam directions, where N1 and n1 are positive integers, n1 ≥ N1, and n1 ≥ 2. At least one beam direction of the n1 beam directions is different from the beam direction in which the UE sent the first message through the first spatial domain filter in step S401.

[0131] If the UE confirms again that the first message has failed to be sent, the UE retransmits the first message to the network device in n2 beam directions through N2 third spatial domain filters, where N2 and n2 are positive integers, n2 ≥ N2, and n2 > n1. At least one of the n2 beam directions is different from any one of the n1 beam directions. It can be seen that when the UE confirms again that the first message has failed to be sent, it can switch to retransmitting the first message in more beam directions, so that the total power of the N2 third spatial domain filters is greater than the total power of the N1 second spatial domain filters, thereby further increasing the total power of the first message.

[0132] Similarly, when UE passes N i The i+1th spatial domain filter is in n i If the first message fails to be sent to the network device in the direction of the beam, the UE can i+1 The i+2th spatial domain filter is in n i+1 The first message is retransmitted to the network device in the direction of the beam. i+1 , n i+1， N i , n i is a positive integer, N i+1 ≥N i , n i+1 >n i .n i+1 There is at least one beam direction among the n beam directions, iIn this way, the total transmission power of the UE for sending the first message can be increased, so that N i+1 The total power of the (i+2)th spatial domain filter is greater than N i The total power of the (i+1)th spatial domain filter is increased, thereby increasing the probability of successful message transmission.

[0133] In some embodiments, in the above step S403, the UE sends the first message to the network device through N second spatial domain filters and the codebook of the first message.

[0134] Specifically, the UE can send the first message to the network device in n different beam directions using N second spatial domain filters and the codebook of the first message. That is, the UE sends the first message to the network device in each of the n beam directions based on the codebook of the first message. The codebook of the first message can be determined according to a communication protocol or according to configuration information sent by the network device. In this way, signals from multiple beam directions can form a coherent superposition at the network device, increasing the probability of successful transmission of the first message, thereby increasing the speed at which the UE accesses the network.

[0135] Alternatively, in the above step S403, the UE may first determine the amplitude and phase of the first message sent in each of the n beam directions, so that the signals containing the first message sent in multiple beam directions can form coherent superposition at the receiving end, thereby increasing the probability of successful transmission of the first message.

[0136] In some embodiments, in step S403, the output power and EIRP corresponding to each of the N second spatial filters satisfy the MPE constraint, and the total output power and EIRP corresponding to the N second spatial filters satisfy the MPE constraint.

[0137] In the embodiment of the present application, the first message may be message 1, message 3, or PUCCH. The following describes how to determine the second power when the first message is message 1, message 3, or PUCCH.

[0138] In some embodiments, the first message is message 1. The first power is determined based on the first power increase number, the first power increase step size, and the first path loss value. It should be noted that the first power is determined based on the first power increase number, the first power increase step size, and the first path loss value, and the first power is not limited to being determined based only on the first power increase number, the first power increase step size, and the first path loss value. The parameters used to determine the first power may also include parameters other than the first power increase number, the first power increase step size, and the first path loss value. For example, the first power P may be obtained as follows: PRACH。

[0139] PPRACH =min{P CMAX,c (i),PREAMBLE_RECEIVED_TARGET_POWER+PL c};

[0140] Specifically, PREAMBLE_RECEIVED_TARGET_POWER=preambleReceivedTargetPower+(PREAMBLE_POWER_RAMPING_COUNTER–1)×PREAMBLE_POWER_RAMPING_STEP+DELTA_PREAMBLE;

[0141] Among them, P CMAX,c (i) is the maximum transmit power allowed by the UE, and i is used to indicate the beam direction corresponding to the first transmit power. PREAMBLE_RECEIVED_TARGET_POWER is the target power of the preamble received; PL c is the path loss, which corresponds to the first path loss in this embodiment; preambleReceivedTargetPower is the initial receive target power of the preamble, DELTA_PREAMBLE is the power offset value corresponding to the random access preamble format, PREAMBLE_POWER_RAMPING_COUNTER is the number of preamble power increases, which corresponds to the first power increase number in this embodiment; PREAMBLE_POWER_RAMPING_STEP is the preamble power increase step, which corresponds to the first power increase step in this embodiment.

[0142] The first power boost number and boost step size may be determined by the UE according to configuration information sent by the network device, or may be determined by the UE according to a communication protocol. The first path loss value is determined by the user equipment according to a path loss measurement value of a path loss reference signal received by the UE from the network device through the first spatial domain filtering.

[0143] Specifically, in step S401, the UE transmits Message 1 to the network device multiple times in the first beam direction through first spatial filtering. Upon each transmission failure, the UE may transmit Message 1 again after performing a power boost in the first beam direction. The first power boost count can be understood as the number of times the UE transmits Message 1 in the first beam direction, or the number of times the power is boosted when transmitting Message 1. The first power boost step size can be understood as the power of each power boost. The first power can be understood as the power obtained after the UE performs the last power boost.

[0144] In step S402, the transmit power of each of the P second spatial domain filters in the N second spatial domain filters is determined based on at least one of the second power boost count, the second power boost step size, and the second path loss value corresponding to the transmit power of the second spatial domain filter. The second power boost count, the second power boost step size, and the second path loss value corresponding to each of the P second spatial domain filters can be understood as second power adjustment parameters for determining the second spatial domain filter. P is a positive integer, and P≤N.

[0145] It should be noted that the transmit power of each second spatial domain filter is determined based on the second power boost number of the second spatial domain filter, the second power boost step size of the second spatial domain filter, and the second path loss value of the second spatial domain filter, and the transmit power of each second spatial domain filter is not limited to being determined only based on the second power boost number, the second power boost step size, and the second path loss value. The second power adjustment parameter used to determine the second power may also include parameters other than the second power boost number, the second power boost step size, and the second path loss value.

[0146] The second power adjustment parameters corresponding to each of the P second spatial domain filters may be the same or different. Any one of the P second spatial domain filters may correspond to one beam direction or multiple beam directions. If one of the P second spatial domain filters corresponds to multiple beam directions, the transmit power of the second spatial domain filter is the transmit power of any one of the beam directions.

[0147] Optionally, the UE may obtain a weighting factor of the second spatial domain filter based on a second power adjustment parameter of each second spatial domain filter in the P second spatial domain filters, and obtain the second power of the second spatial domain filter based on the weighting factor.

[0148] The second power increase times corresponding to the transmit power of each second spatial domain filter in the P second spatial domain filters are greater than the first power increase times.

[0149] In the embodiment of the present application, when message 1 fails to be sent or random access fails, the user equipment switches to retransmitting message 1 in n beam directions and performs power boosting in the beam directions corresponding to P second spatial domain filters in the n beam directions. This can increase the transmit power of each of the P second spatial domain filters. This helps to increase the total power of the N second spatial domain filters, thereby increasing the probability of successful transmission of message 1.

[0150] Optionally, if the UE fails to retransmit message 1, the UE may retransmit message 1 again. When retransmitting message 1 through N' third spatial domain filters, these N' third spatial domain filters may not perform power boosting, that is, the number of power boosts corresponding to the transmission power of these N' third spatial domain filters is equal to the second power boosting number.

[0151] The second power boost number may be determined by the UE based on configuration information sent by the network device, or by the UE based on a communication protocol, or by the UE through other means. For example, the UE may determine the second power boost number based on one or more of the distance to the organism, the second path loss, and the second power boost step size. This application does not limit the method for determining the second power boost number.

[0152] In some optional embodiments, among the P second spatial domain filters, the second power increase step size of at least one second spatial domain filter is larger than the first power increase step size. In this way, the UE can increase the second power to a greater extent, thereby increasing the probability of successful transmission of message 1.

[0153] In some embodiments, the second power boosting step sizes of the P second spatial domain filters are the same.

[0154] For example, the configuration information sent by the network device includes information indicating the first power boost step size. The UE obtains the first power boost step size based on the configuration information, and determines the second power boost step size based on the first power boost step size. This second power boost step size can be used to determine the transmit power corresponding to each second spatial domain filter in the P second spatial domain filters. In this way, the network device only needs to configure one power boost step size, and the configuration information required to be configured by the network device is reduced, which can save wireless transmission resources. Moreover, the UE only needs to calculate the second power boost step size once for the P second spatial domain filters, which can reduce the data processing amount of the UE.

[0155] For another example, the configuration information sent by the network device includes information indicating a first power boost step size and information indicating a second power boost step size. The UE obtains the first power boost step size and the second power boost step size based on the configuration information. The first power boost step size is used to determine the first power, and the second power boost step size is used to determine the transmit power corresponding to each of the P second spatial domain filters. In this way, the network device can better control the UE's transmit power by configuring the second power boost step sizes in the P second spatial domain filters.

[0156] In some other embodiments, the second power boosting step sizes of the P second spatial domain filters are different.

[0157] For example, the configuration information sent by the network device includes information indicating that the second power boost step size of a second spatial domain filter is a second power boost step size a. The UE obtains the second power boost wavelength a of a second spatial domain filter A among P second spatial domain filters based on the configuration information, and determines the second power boost step size of the second spatial domain filters other than the second spatial domain filter A based on the second power boost step size a. The P second spatial domain filters correspond to P power boost step sizes, and the second spatial domain filter A is any one of the P second spatial domain filters.

[0158] The first second power boost step size is PREAMBLE_POWER_RAMPING_STEP_1, which is the second power boost step size a. The UE determines the kth second power boost step size PREAMBLE_POWER_RAMPING_STEP_k according to PREAMBLE_POWER_RAMPING_STEP_1, where k=2, 3, ..., P.

[0159] The k-th second power boosting step size PREAMBLE_POWER_RAMPING_STEP_k=k×PREAMBLE_POWER_RAMPING_STEP_1.

[0160] Alternatively, the k-th second power boost step size PREAMBLE_POWER_RAMPING_STEP_k = f(k) + PREAMBLE_POWER_RAMPING_STEP_1, where k = 1, 2, …, P; for example, f(k) = k × alpha or f(k) = alpha × 10 × round(log10(k)), where alpha is a constant determined by the UE based on configuration information sent by the network device, or a step size determined by the UE itself. round indicates rounding to the nearest integer.

[0161] For another example, the configuration information sent by the network device includes information for indicating the first power boost step size of the first spatial domain filter. The UE obtains the first power boost step size of the first spatial domain filter based on the configuration information, and then calculates the second power boost step size corresponding to each second spatial domain filter in the P second spatial domain filters based on the first power boost step size. In this way, the network device only needs to configure one power boost step size, and the configuration information required to be configured by the network device is reduced, which can save wireless transmission resources. Moreover, the UE only needs to calculate the second power boost step size once for the P second spatial domain filters, which can reduce the data processing amount of the UE. Specifically, the second power boost step size of the second spatial domain filter 1 in the P second spatial domain filters is the same as the first power boost step size. The UE determines the second power boost step size of other second spatial domain filters in the P second spatial domain filters except the second spatial domain filter 1 based on the second power boost step size of the second spatial domain filter 1. The UE determines the second power boost step size of the other second spatial domain filters except the second spatial domain filter 1 among the P second spatial domain filters based on the second power boost step size of the second spatial domain filter 1. Please refer to the above method of determining the second power boost step size of the second spatial domain filters except the second spatial domain filter A based on the second power boost step size a.

[0162] For another example, the configuration information sent by the network device includes information indicating a first power increase step size for the first spatial domain filter and information indicating a second power increase step size for each of P second spatial domain filters. The UE can then obtain the first power increase step size for the first spatial domain filter and the second power increase step size for each of the P second spatial domain filters based on the network configuration information.

[0163] Before step S403, the UE may first determine a path loss measurement value for each of the P second spatial domain filters. Specifically, the user equipment may determine the path loss measurement value for each second spatial domain filter based on the power loss of the reference signal received by the UE from each of the P second spatial domain filters.

[0164] In some optional embodiments, the second path loss values of the P second spatial domain filters are identical. That is, the second path loss value in the power adjustment parameter of each of the P second spatial domain filters is identical. The second path loss value is determined by the user equipment based on the path loss measurement values of the P second spatial domain filters.

[0165] The UE can use the arithmetic mean or weighted mean of the path loss measurement values of the P second spatial domain filters as the second path loss value. The second path loss value obtained in this way takes into account the path loss measurement value of each second spatial domain filter in the P second spatial domain filters, and the transmission power determined according to the second path loss value is more reasonable.

[0166] The UE may also use the largest path loss measurement value among the P second spatially filtered path loss measurements as the second path loss value. To ensure the network device's receive power, the UE must compensate for the transmit power based on the path loss value when determining transmit power. This results in a larger second path loss value and a greater required compensation power, thereby increasing the UE's transmit power and improving the UE's access success rate.

[0167] The UE may also use the minimum path loss measurement value among the P second spatial domain filtered path loss measurement values as the second path loss value, so as to balance the interference brought to the network.

[0168] The UE can also use any path loss measurement value that is less than the path loss threshold value among the P second spatial domain filtered path loss measurement values as the path loss value. The path loss threshold value is determined based on the configuration information sent by the network device. If there is no path loss measurement value that is less than the path loss threshold value among the P second spatial domain filtered path loss measurement values, the minimum path loss measurement value among the P second spatial domain filtered path loss measurement values is used as the second path loss value. This can appropriately avoid the UE's transmit power being too high and reduce the interference to the network caused by the UE sending uplink messages.

[0169] It should be noted that, in other embodiments, other methods may be used to determine the second path loss based on the P second spatial domain filtered path loss measurement values. This application does not limit how to determine the second path loss value based on the P second spatial domain filtered path loss measurement values.

[0170] Prior to step S403, the UE may determine whether the difference between the N or P second spatial domain filtered path loss measurement values meets a preset requirement or a requirement configured by the network device. For example, the difference between the maximum path loss measurement value and the minimum path loss measurement value among the N or P second spatial domain filtered path loss measurement values does not exceed X dB, where X is a preset value or a threshold configured by the network device. In this way, the difference between the transmit powers of the N spatial domain filters can be reduced, thereby achieving higher transmission efficiency.

[0171] In other optional embodiments, the path loss values of the P second spatial domain filters are different, and the path loss value of each second spatial domain filter in the P second spatial domain filters is determined based on the path loss measurement value of the second spatial domain filter. In other words, the path loss value of each second spatial domain filter in the P second spatial domain filters is determined based on the path loss measurement value of each second spatial domain filter. In this way, the second path loss value used to calculate the transmit power of each second spatial domain filter can accurately reflect the path loss corresponding to the second spatial domain filter, thereby making the transmit power calculated by the UE more accurate.

[0172] In some embodiments, the first message is message 3. When the first message is message 3, the first power is determined based on the first path loss value and the first accumulated power adjustment. The method for determining the first path loss value can refer to the method for determining the first path loss value when the first message is message 1, which will not be repeated here. The first accumulated power adjustment is determined by the UE based on the configuration information sent by the network device. The method for determining the first power can be specifically referred to in 3GPP TS38.213, the physical uplink shared channel transmission power corresponding to message 3 [PUSCH transmission power, P PUSCH,b,f,c (i,j,q d ,l)] is determined.

[0173] It should be noted that the first power is determined based on the first path loss value and the first cumulative power adjustment, and it is not limited to that the first power is determined only based on the first path loss value and the first cumulative power adjustment. The parameters used to determine the first power may also include parameters other than the first path loss value and the first cumulative power adjustment.

[0174] In step S402, the transmission power of each second spatial domain filter in the P second spatial domain filters in the N second spatial domain filters is determined based on the second cumulative power adjustment of the second spatial domain filter and the second path loss value of the second spatial domain filter. The second cumulative power adjustment of each second spatial domain filter and the second path loss value of the second spatial domain filter can be understood as the second power adjustment parameter for determining the transmission power of the second spatial domain filter. The power adjustment parameters corresponding to each second spatial domain filter in the P second spatial domain filters can be the same or different. If a second spatial domain filter in the P second spatial domain filters corresponds to multiple beam directions, the transmission power of the second spatial domain filter is the transmission power of any one of the beam directions.

[0175] When the first message is message 3, the method for determining the second path loss value can refer to the method for determining the second path loss value when the first message is message 1, which will not be repeated here.

[0176] The second cumulative power adjustment for any of the P second spatial domain filters is different from the first cumulative power adjustment. Thus, when the UE switches from sending message 3 in one beam direction to sending message 3 in n beam directions, the UE adjusts the cumulative power adjustment values of the P second spatial domain filters to adjust the transmit power in the beam directions corresponding to these P second spatial domain filters, thereby increasing the power in the beam directions corresponding to these P second spatial domain filters. This helps to increase the total power of the N second spatial domain filters, thereby increasing the probability of successful transmission of message 3.

[0177] The second accumulated power adjustment for each of the P second spatial domain filters may be the same. The UE may obtain a first accumulated power adjustment and a second accumulated power adjustment b. The UE may use the second accumulated power adjustment b as the second accumulated power adjustment for each of the P second spatial domain filters.

[0178] The second cumulative power adjustment of each second spatial domain filter of the P second spatial domain filters may be different. The UE may obtain a first cumulative power adjustment and P second cumulative power adjustments. The P second cumulative power adjustments are respectively the second power adjustments of each second spatial domain filter of the P second spatial domain filters. Alternatively, the UE may obtain a first cumulative power adjustment and a second cumulative power adjustment b. The UE then uses the second cumulative power adjustment b as the second cumulative power adjustment of the second spatial domain filter B among the P second spatial domain filters, and determines the second cumulative power adjustment of the second spatial domain filters other than the second spatial domain filter B among the P second spatial domain filters based on the second cumulative power adjustment b.

[0179] The first accumulated power adjustment and the second accumulated power adjustment obtained by the UE may be determined according to configuration information sent by the network device, or may be determined by the UE itself.

[0180] Specifically, the first accumulated power adjustment is determined according to the power increased when the UE sends message 1 and / or the first power adjustment value. The second accumulated power adjustment is determined according to the first accumulated power adjustment and / or the second power adjustment value.

[0181] If the second cumulative power adjustments for each of the P second spatial domain filters are identical, the UE may obtain a first power adjustment value and a second power adjustment value. The UE determines the first cumulative power adjustment based on the first power adjustment value and the power increased when the UE sends message 1, and determines the second cumulative power adjustments for the P second spatial domain filters based on the second power adjustment value and the first cumulative power adjustment.

[0182] If the second cumulative power adjustment for each of the P second spatial domain filters can be different, the UE can obtain a first power adjustment value and a second power adjustment value. The UE obtains P different second power adjustment values based on the one second power adjustment value. The P second power adjustment values correspond one-to-one to the P second spatial domain filters. The second cumulative power adjustment for each of the P second spatial domain filters is determined based on the first cumulative power adjustment and the second power adjustment value corresponding to the second spatial domain filter.

[0183] The following describes a process in which the UE obtains P different second power adjustment values according to the one second power adjustment value.

[0184] The P second power adjustment values are denoted as Delta_1, Delta_2, ..., Delta_k, where k = 2, 3, ..., P. The single second power adjustment value is referred to as Delta_1. Then, Delta_k = k × Delta_1, or Delta_k = f(k) + Delta_1, where f(k) = k × alpha, or f(k) = alpha × 10 × round(log10(k)). Alpha is a constant determined based on network device indication information or a UE power adjustment value, and round represents rounding.

[0185] The first power adjustment value and the second power adjustment value obtained by the UE may be determined according to configuration information sent by the network device, or may be determined by the UE itself.

[0186] The second power adjustment value may be the power adjustment value corresponding to the transmit power control in the PDCCH received by the UE, or the power adjustment value for the switching beam. The UE may determine the power adjustment value for the switching beam based on the configuration information sent by the network device, or may determine the power adjustment value for the switching beam independently.

[0187] If the UE fails to retransmit message 3, the UE may retransmit message 3 again. When retransmitting message 3 through N' third spatial domain filters, these N' third spatial domain filters may not perform power boosting, that is, the cumulative power adjustment corresponding to the transmission power of these N' third spatial domain filters is equal to the second cumulative power adjustment.

[0188] It should be noted that the transmission power of each second spatial domain filter is determined based on the second path loss value of the second spatial domain filter and the second cumulative power adjustment of the second spatial domain filter. The transmission power of the second spatial domain filter is not limited to being determined only based on the second path loss value and the second cumulative power adjustment. The parameters used to determine the transmission power of the second spatial domain filter may also include parameters other than the second path loss value and the second cumulative power adjustment.

[0189] In some embodiments, the first message is PUCCH. The first power is determined based on the first path loss value and the first accumulated power adjustment. It should be noted that the first power is determined based on the first path loss value and the first accumulated power adjustment, and the first power is not limited to being determined only based on the first path loss value and the first accumulated power adjustment. The parameters used to determine the first power may also include parameters other than the first path loss value and the first accumulated power adjustment. When the first message is PUCCH, for details on how to determine the first power, please refer to 3GPP TS38.213, Target Physical Uplink Control Channel Transmission Power [PUCCH transmission power, P O_PUCCH,b,f,c (q u )] is determined.

[0190] The transmission power of each second spatial domain filter in the P second spatial domain filters in the N second spatial domain filters is determined according to the second path loss value of the second spatial domain filter and the second accumulated power adjustment of the second spatial domain filter.

[0191] The second cumulative power adjustment differs from the first cumulative power adjustment. Thus, when the UE switches from transmitting PUCCH in one beam direction to transmitting PUCCH in n beam directions, the UE adjusts the cumulative power adjustment values of P second spatial filters to adjust the transmit power in the beam directions corresponding to these P second spatial filters, thereby boosting the power in the beam directions corresponding to these P second spatial filters. This helps to increase the total power of the N second spatial filters, thereby increasing the probability of successful PUCCH transmission.

[0192] The method for determining the first path loss value can refer to the method for determining the first path loss value when the first message is message 3. The method for determining the second path loss value can refer to the method for determining the second path loss value when the first message is message 3. No further details will be given here.

[0193] The first accumulated power adjustment is determined based on the power increased when the UE sends message 1, the power increased when the UE sends message 3, and the first power adjustment value. The second accumulated power adjustment is determined based on the first accumulated power adjustment and the second power adjustment value.

[0194] For relevant instructions on the first accumulated power adjustment and the second accumulated power adjustment, please refer to the relevant instructions on the first accumulated power adjustment and the second accumulated power adjustment when the first message is message 3. To avoid redundancy, they will not be repeated here.

[0195] It should be noted that the transmission power of each second spatial domain filter is determined based on the second path loss value of the second spatial domain filter and the second cumulative power adjustment of the second spatial domain filter. The transmission power of the second spatial domain filter is not limited to being determined only based on the second path loss value and the second cumulative power adjustment. The parameters used to determine the transmission power of the second spatial domain filter may also include parameters other than the second path loss value and the second cumulative power adjustment.

[0196] See also Figure 6 , Figure 6 This is another flow chart of the message retransmission method according to an embodiment of the present application. The message retransmission method includes:

[0197] S601. A UE sends a first message to a network device at a first power through a first spatial domain filtering.

[0198] The first message is message 1, message 3 or PUCCH.

[0199] When the first message is message 1, message 3 or PUCCH, the method for determining the first power can be found in the above embodiment and will not be described again here.

[0200] S602: The UE confirms that the first message needs to be retransmitted.

[0201] S603. The UE confirms that the transmission power of the retransmitted first message through the first spatial domain filtering exceeds the power threshold corresponding to the maximum allowed exposure, and the power threshold is less than or equal to the maximum power corresponding to the maximum allowed exposure.

[0202] The power threshold may be equal to the maximum power corresponding to the maximum allowable exposure, or may be slightly smaller than the maximum power corresponding to the maximum allowable exposure.

[0203] It is understood that when the UE confirms that it needs to retransmit the first message, it first calculates the transmit power required for retransmitting the first message using the first spatial domain filter. If the transmit power required for retransmitting the first message using the first spatial domain filter exceeds the power threshold, the UE switches to retransmitting the first message using N second spatial domain filters.

[0204] For example, when the first message is message 1, the transmission power required by the UE to retransmit the first message through the first spatial domain filtering is the sum of the first power and the first power increase step; when the first message is message 3, the transmission power required by the UE to retransmit the first message through the first spatial domain filtering is the sum of the first power and the first power adjustment value; when the first message is PUCCH, the transmission power required by the UE to retransmit the first message through the first spatial domain filtering is the sum of the first power and the first power adjustment value.

[0205] S604. The UE retransmits the first message to the network device through N second spatial domain filters, where N is a positive integer.

[0206] Specifically, N second spatial domain filters correspond to n beam directions, where n is a positive integer and n>N.

[0207] In this way, when the first power is about to exceed or has exceeded the maximum power corresponding to the maximum allowable exposure, the UE switches to retransmit the first message to the network device in multiple beam directions, so that the total sending power of the UE sending the first message is greater than the first power, thereby enabling the UE's sending power to break through the limit of the maximum power corresponding to the maximum allowable exposure, thereby increasing the probability of successful sending of the first message, and thus speeding up the UE's access to the network.

[0208] It is understood that the information transmission method of this embodiment can also be implemented by the communication device 500 of the above-described embodiment. Specifically, the communication device 500 executes steps S601 to S604. Specifically, the processor 501 reads computer instructions from the memory 502 and performs the following operations: the transmitter 5031 transmits a first message to the network device at a first power through a first spatial domain filter; the processor 501 confirms that the first message needs to be retransmitted and that the first power exceeds the power threshold corresponding to the maximum allowable exposure, and the transmitter 5031 retransmits the first message to the network device through N second spatial domain filters.

[0209] It should be noted that the specific implementation process of steps S601, S602, and S604 can refer to the relevant description of steps S401, S402, and S403 in the above embodiment. Other supplementary explanations in the above embodiments are also applicable to this embodiment and will not be repeated here to avoid redundancy.

[0210] In certain embodiments, in step S403 or S604, the difference between the transmit power of each spatial domain in the N second spatial domain filters meets a preset requirement or a requirement configured by the network device. For example, the difference between the maximum transmit power and the minimum transmit power in the N second spatial domain filters does not exceed Y dB, where Y is a preset value or a threshold configured by the network device. In this way, reducing the difference between the transmit power of the N spatial domain filters can achieve higher performance gains.

[0211] See also Figure 7 , Figure 7This is a module diagram of a message retransmission device according to an embodiment of the present application. The message retransmission device 700 includes: a transceiver unit 701 and a processing unit 702. The transceiver unit 701 may include a sending unit and a receiving unit, which are respectively used to perform the sending and receiving operations in the method embodiment. The processing unit 702 is used to implement other operations in addition to sending and receiving, for example: the transceiver unit 701 is used to send a first message to a network device at a first power through a first spatial domain filter; and retransmit the first message to the network device through N second spatial domain filters, wherein the N second spatial domain filters include at least one spatial domain filter different from the first spatial domain filter, and N is a positive integer. The first message is a message sent by the UE to the network device during the random access process. The first message is message 1, message 3 or PUCCH. In this way, when the first message fails to be sent or when random access fails, switching to retransmitting the first message in multiple beam directions helps to increase the total transmission power of the first message, thereby increasing the probability of successful transmission of the first message.

[0212] In some embodiments, the first message is message 1, the number of second power increases corresponding to the transmission power of each of P second spatial domain filters out of N second spatial domain filters is greater than the number of first power increases corresponding to the first power; P is a positive integer, P≤N.

[0213] In the embodiment of the present application, when message 1 fails to be sent or random access fails, message 1 is retransmitted through N second spatial domain filters, and power is boosted in the beam directions corresponding to P of the N second spatial domain filters. This can increase the transmit power of each of the P second spatial domain filters. This helps to increase the total power of the N second spatial domain filters, thereby increasing the probability of successful transmission of message 1.

[0214] The message retransmission device 700 of this embodiment may be, for example, a user device, or a chip or functional module of the user device. Alternatively, the message retransmission device 700 of this embodiment may be deployed in the apparatus 500 of this embodiment. The transceiver 503 in the above embodiment may serve as the transceiver unit 701, and the processor 501 in the above embodiment may serve as the processing unit 702.

[0215] Based on the above-mentioned implementation method in which the first message is message 1, in some implementation methods, the first power is determined by the processing unit 702 based on the first power increase step and the first power increase number; the transmission power of each second spatial domain filter in the P second spatial domain filters is determined by the processing unit 702 based on the second power increase step and the second power increase number corresponding to the transmission power of the second spatial domain filter.

[0216] Optionally, the second power boost step size is determined by processing unit 702 based on the first power boost step size. In this way, the network device only needs to configure one power boost step size as the first power boost step size, which can save wireless transmission resources. Furthermore, processing unit 702 only needs to calculate the second power boost step size once for the P second spatial domain filters, which can reduce the data processing load of processing unit 702.

[0217] Optionally, P ≥ 2, a second power increase step size a of second spatial domain filter A among the P second spatial domain filters is determined based on network device configuration information, and the second power increase step sizes of the second spatial domain filters other than second spatial domain filter A among the P second spatial domain filters are determined based on the second power increase step size a. In this way, the network device can better control the transmit power by configuring the second power increase step sizes among the P second spatial domain filters, where the second spatial domain filter A is any one of the P second spatial domain filters.

[0218] Optionally, the path loss values of the P second spatial domain filters are the same, and the path loss value is the minimum value among the path loss measurement values of the P second spatial domain filters; or the path loss value is any one of the path loss measurement values of the P second spatial domain filters that is less than the path loss threshold value.

[0219] Further, the processing unit 702 is further configured to obtain a path loss measurement value of each second spatial domain filter in the P second spatial domain filters; the path loss measurement value of each second spatial domain filter in the P second spatial domain filters is used to determine a path loss value of each second spatial domain filter in the P second spatial domain filters, and the path loss value of each second spatial domain filter in the P second spatial domain filters is used to determine the transmit power of the second spatial domain filter for retransmitting the first message;

[0220] Among them, the path loss values of the P second spatial domain filters are the same, and the path loss value is determined by the UE based on the path loss measurement values of the P second spatial domain filters. The second path loss value obtained in this way takes into account the path loss measurement value of each second spatial domain filter in the P second spatial domain filters, and the transmit power determined according to the second path loss value is more reasonable; or

[0221] The path loss values of the P second spatial domain filters are different, and the path loss value of each of the P second spatial domain filters is determined based on the path loss measurement value of the second spatial domain filter. In this way, the second path loss value used to calculate the transmit power of each second spatial domain filter can accurately reflect the path loss corresponding to the second spatial domain filter, thereby making the transmit power calculated by processing unit 702 more accurate.

[0222] In some embodiments, the first message is message 3, and the second cumulative power adjustment corresponding to each of P of the N second spatial domain filters is different from the first cumulative power adjustment corresponding to the first spatial domain filter. Thus, when switching from sending message 3 in one beam direction to sending message 3 in n beam directions, the cumulative power adjustment values of the P second spatial domain filters are adjusted to adjust the transmit power in the beam directions corresponding to the P second spatial domain filters, thereby increasing the power in the beam directions corresponding to the P second spatial domain filters. This helps to increase the total power of the N second spatial domain filters, thereby increasing the probability of successful transmission of message 3.

[0223] In some embodiments, the first message is a PUCCH, and the second cumulative power adjustment corresponding to each of the P second spatial domain filters in the N second spatial domain filters is different from the first cumulative power adjustment corresponding to the first spatial domain filter. In this way, when the UE switches from transmitting PUCCH in one beam direction to transmitting PUCCH in n beam directions, the UE adjusts the transmit power of the beam directions corresponding to the P second spatial domain filters by adjusting the cumulative power adjustment values of the P second spatial domain filters, thereby achieving power boosting for the beam directions corresponding to the P second spatial domain filters. This helps to increase the total power of the N second spatial domain filters, thereby increasing the probability of successful PUCCH transmission.

[0224] In certain embodiments, N ≥ 2; among the N second spatial domain filters, at least two of the second spatial domain filters transmit first messages associated with different synchronization signals; or among the N second spatial domain filters, at least two of the second spatial domain filters transmit first messages associated with different physical broadcast channel blocks; or among the N second spatial domain filters, at least two of the second spatial domain filters transmit first messages associated with different channel state information reference signal resources. This can increase the coverage of the first message and improve the probability of successful transmission of the first message. The first message is Message 1, Message 3, or PUCCH.

[0225] In certain embodiments, the processing unit 702 is further configured to: confirm that the transmit power of the retransmitted first message through the first spatial domain filtering exceeds a power threshold corresponding to the maximum allowable exposure, and that the power threshold is less than or equal to the maximum power corresponding to the maximum allowable exposure. Thus, when the first power is about to exceed or has exceeded the maximum power corresponding to the maximum allowable exposure, the processing unit 702 switches to retransmitting the first message to the network device along multiple beam directions, such that the total transmit power of the first message exceeds the first power, thereby enabling the transmit power to exceed the maximum power limit corresponding to the maximum allowable exposure and increasing the probability of successful transmission of the first message. The first message is Message 1, Message 3, or PUCCH.

[0226] It should be noted that the explanations of the message retransmission methods of the above embodiments are also applicable to the message retransmission devices of the above embodiments, and will not be repeated here to avoid redundancy.

[0227] An embodiment of the present application also provides a communication device, which is a user device or a terminal device, including a processor and a memory, the memory being used to store computer instructions, and the processor executing the computer program or instructions in the memory so that the message retransmission method of any of the above embodiments is executed.

[0228] An embodiment of the present application further provides an apparatus comprising a processor coupled to a memory. When the processor executes a computer program or instruction in the memory, the message retransmission method of any of the above embodiments is executed. Optionally, the apparatus further comprises a memory. Optionally, the apparatus further comprises a communication interface, the processor coupled to the communication interface.

[0229] In one implementation, the apparatus is a user equipment. When the communication device is a user equipment, the communication interface may be a transceiver or an input / output interface. Alternatively, the transceiver may be a transceiver circuit. Alternatively, the input / output interface may be an input / output circuit.

[0230] In another implementation, the device is a chip or a chip system. When the device is a chip or a chip system, the communication interface can be an input / output interface, interface circuit, output circuit, input circuit, pin, or related circuit on the chip or chip system. The processor can also be embodied as a processing circuit or a logic circuit.

[0231] An embodiment of the present application also provides a communication device, which includes a processor and an interface circuit, wherein the interface circuit is used to receive code instructions and transmit them to the processor; the processor runs the code instructions to execute the method of any of the above embodiments.

[0232] An embodiment of the present application also provides a system, which includes the above-mentioned user equipment and network equipment.

[0233] An embodiment of the present application further provides a computer program product, which includes: a computer program (also referred to as code, or instructions), which, when executed, enables a computer to execute the message retransmission method of any of the above embodiments.

[0234] An embodiment of the present application also provides a computer-readable storage medium, which stores a computer program (also referred to as code or instructions). When the computer-readable storage medium is run on a computer, the computer executes the message retransmission method of any of the above embodiments.

[0235] The present application also provides a communication device including an input circuit, an output circuit, and a processing circuit. The processing circuit is configured to receive a signal through the input circuit and transmit a signal through the output circuit, thereby implementing the message retransmission method of any of the above embodiments.

[0236] In a specific implementation, the communication device may be a chip, the input circuit may be an input pin, the output circuit may be an output pin, and the processing circuit may be a transistor, a gate circuit, a trigger, or various logic circuits. The input signal received by the input circuit may be, for example, but not limited to, received and input by a receiver, and the signal output by the output circuit may be, for example, but not limited to, output to and transmitted by a transmitter. The input circuit and the output circuit may be the same circuit, which functions as an input circuit and an output circuit at different times. This application does not limit the specific implementation of the processor and various circuits.

[0237] The present application provides a computer-readable storage medium, in which computer instructions are stored. The computer instructions instruct a user equipment to execute the message retransmission method of any of the above embodiments.

[0238] It should be understood that the processor mentioned in the embodiments of the present application may be a central processing unit (CPU), or may be other general-purpose processors, digital signal processors (DSP), application-specific integrated circuits (ASIC), field programmable gate arrays (FPGA), or other programmable logic devices, discrete gate or transistor logic devices, discrete hardware components, etc. The general-purpose processor may be a microprocessor or any conventional processor, etc.

[0239] It should also be understood that the memory mentioned in the embodiments of the present application may be a volatile memory or a non-volatile memory, or may include both volatile and non-volatile memories. Among them, the non-volatile memory may be a read-only memory (ROM), a programmable read-only memory (PROM), an erasable programmable read-only memory (EPROM), an electrically erasable programmable read-only memory (EEPROM), or a flash memory. The volatile memory may be a random access memory (RAM), which is used as an external cache. By way of example and not limitation, many forms of RAM are available, such as static random access memory (SRAM), dynamic random access memory (DRAM), synchronous dynamic random access memory (SDRAM), double data rate synchronous dynamic random access memory (DDR SDRAM), enhanced synchronous dynamic random access memory (ESDRAM), synchronous link dynamic random access memory (SLDRAM), and direct RAM bus random access memory (DR RAM).

[0240] It should be noted that when the processor is a general-purpose processor, DSP, ASIC, FPGA or other programmable logic device, discrete gate or transistor logic device, discrete hardware component, the memory (storage module) is integrated into the processor.

[0241] It should be noted that the memory described herein is intended to include, but not be limited to, these and any other suitable types of memory.

[0242] It should be understood that in the various embodiments of the present application, the size of the serial numbers of the above-mentioned processes does not mean the order of execution. The execution order of each process should be determined by its function and internal logic, and should not constitute any limitation on the implementation process of the embodiments of the present application.

[0243] Those skilled in the art will appreciate that the units and algorithm steps of each example described in conjunction with the embodiments disclosed herein can be implemented in electronic hardware, or a combination of computer software and electronic hardware. Whether these functions are performed in hardware or software depends on the specific application and design constraints of the technical solution. Professional and technical personnel can use different methods to implement the described functions for each specific application, but such implementation should not be considered beyond the scope of this application.

[0244] Those skilled in the art will clearly understand that, for the convenience and brevity of description, the specific working processes of the systems, devices and units described above can refer to the corresponding processes in the aforementioned method embodiments and will not be repeated here.

[0245] In the several embodiments provided in this application, it should be understood that the disclosed systems, devices and methods can be implemented in other ways. For example, the device embodiments described above are merely schematic. For example, the division of units is only a logical function division. In actual implementation, there may be other division methods, such as multiple units or components can be combined or integrated into another system, or some features can be ignored or not executed. Another point is that the mutual coupling or direct coupling or communication connection shown or discussed can be through some interfaces, indirect coupling or communication connection of devices or units, which can be electrical, mechanical or other forms.

[0246] Units described as separate components may or may not be physically separate, and components shown as units may or may not be physical units, that is, they may be located in one place or distributed across multiple network units. Some or all of these units may be selected to achieve the purpose of this embodiment according to actual needs.

[0247] In addition, each functional unit in each embodiment of the present application may be integrated into one processing unit, or each unit may exist physically separately, or two or more units may be integrated into one unit.

[0248] If the function is implemented in the form of a software functional unit and sold or used as an independent product, it can be stored in a computer-readable storage medium. Based on this understanding, the technical solution of the present application, or the part that contributes to the prior art, or the part of the technical solution, can be embodied in the form of a software product. The computer software product is stored in a storage medium and includes several instructions for enabling a computer device (which can be a personal computer, server, or network device, etc.) to execute all or part of the steps of the various embodiments of the present application. The aforementioned storage medium includes: various media that can store program codes, such as a USB flash drive, a mobile hard disk, a read-only memory (ROM), a random access memory (RAM), a magnetic disk or an optical disk.

[0249] The steps in the method of the embodiment of the present application can be adjusted in order, combined and deleted according to actual needs.

[0250] The modules in the device of the embodiment of the present application can be merged, divided and deleted according to actual needs.

[0251] As described above, the above embodiments are only used to illustrate the technical solutions of the present application, rather than to limit them. Although the present application has been described in detail with reference to the above embodiments, those skilled in the art should understand that they can still modify the technical solutions described in the above embodiments, or make equivalent replacements for some of the technical features therein. However, these modifications or replacements do not cause the essence of the corresponding technical solutions to deviate from the scope of the technical solutions of the embodiments of the present application.

Claims

1. A message retransmission method, characterized in that: include: The user equipment sends message 1 to the network device at a first power through a first spatial domain filtering; The user equipment retransmits message 1 to the network device through N second spatial domain filters, wherein the second power increase times corresponding to the transmission power of each second spatial domain filter in the P second spatial domain filters are greater than the first power increase times corresponding to the first power, and the second power increase step length of at least one second spatial domain filter in the P second spatial domain filters is greater than the first power increase step length; the N second spatial domain filters include at least one spatial domain filter that is different from the first spatial domain filter, wherein N and P are both positive integers, and P≤N.

2. The method according to claim 1, characterized in that The first power is determined based on the first power boost step and the first power boost number; the transmission power of each second spatial domain filter in the P second spatial domain filters is determined based on the second power boost step and the second power boost number corresponding to the transmission power of the second spatial domain filter, and the second power boost step is determined based on the first power boost step.

3. The method according to claim 1 or 2, characterized in that Before the user equipment retransmits message 1 to the network device through the N second spatial domain filters, the method further includes: the user equipment obtaining a path loss measurement value of each second spatial domain filter in the P second spatial domain filters; The path loss values of the P second spatial domain filters are the same, and the path loss value is determined by the user equipment according to the path loss measurement values of the P second spatial domain filters; or The path loss values of the P second spatial domain filters are different, and the path loss value of each second spatial domain filter in the P second spatial domain filters is determined according to a path loss measurement value of the second spatial domain filter; The path loss value of each second spatial domain filter in the P second spatial domain filters is used to determine the transmission power of the second spatial domain filter for retransmitting the message 1.

4. The method according to claim 3, characterized in that The path loss values of the P second spatial domain filters are the same, The path loss value is the minimum value of the P second spatial domain filtered path loss measurement values; or The path loss value is any one of the P second spatial domain filtered path loss measurement values that is less than a path loss threshold value.

5. The method according to claim 1, wherein Said N≥2; Among the N second spatial domain filters, the synchronization signals associated with the message 1 sent by at least two second spatial domain filters are different; or Among the N second spatial domain filters, the physical broadcast channel blocks associated with the message 1 sent by at least two second spatial domain filters are different; or Among the N second spatial domain filters, the channel state information reference signal resources associated with the message 1 sent by at least two second spatial domain filters are different.

6. The method according to claim 1, characterized in that Before the user equipment retransmits message 1 to the network device through N second spatial domain filters, the method further includes: The user equipment confirms that the transmission power of the retransmitted message 1 through the first spatial domain filtering exceeds a power threshold corresponding to a maximum allowed exposure, and the power threshold is less than or equal to a maximum power corresponding to the maximum allowed exposure.

7. A message retransmission device, characterized in that: It includes a transceiver unit and a processing unit, wherein the transceiver unit is used to: Sending message 1 to the network device at a first power through a first spatial domain filtering; Message 1 is retransmitted to the network device through N second spatial domain filters, wherein the number of second power increases corresponding to the transmission power of each second spatial domain filter in the P second spatial domain filters is greater than the number of first power increases corresponding to the first power, and the second power increase step size of at least one second spatial domain filter in the P second spatial domain filters is greater than the first power increase step size; the N second spatial domain filters include at least one spatial domain filter that is different from the first spatial domain filter, wherein N and P are both positive integers, and P≤N.

8. The message retransmission device according to claim 7, characterized in that: The first power is determined by the processing unit based on the first power boost step and the first power boost number; the transmission power of each second spatial domain filter in the P second spatial domain filters is determined by the processing unit based on the second power boost step and the second power boost number corresponding to the transmission power of the second spatial domain filter, and the second power boost step is determined based on the first power boost step.

9. The message retransmission device according to claim 7 or 8, characterized in that: The processing unit is used for: Obtaining a path loss measurement value of each second spatial domain filter in the P second spatial domain filters; The path loss values of the P second spatial domain filters are the same, and the path loss value is determined by the processing unit according to the path loss measurement values of the P second spatial domain filters; The path loss values of the P second spatial domain filters are different, and the path loss value of each second spatial domain filter in the P second spatial domain filters is determined by the processing unit according to a path loss measurement value of the second spatial domain filter; The path loss value of each second spatial domain filter in the P second spatial domain filters is used to determine the transmission power of the second spatial domain filter for retransmitting the message 1.

10. The message retransmission device according to claim 9, characterized in that: The path loss values of the P second spatial domain filters are the same, The path loss value is the minimum value of the P second spatial domain filtered path loss measurement values; or The path loss value is any one of the P second spatial domain filtered path loss measurement values that is less than a path loss threshold value.

11. The message retransmission device according to claim 7, characterized in that: Said N≥2; Among the N second spatial domain filters, the synchronization signals associated with the message 1 sent by at least two second spatial domain filters are different; or Among the N second spatial domain filters, the physical broadcast channel blocks associated with the message 1 sent by at least two second spatial domain filters are different; or Among the N second spatial domain filters, the channel state information reference signal resources associated with the message 1 sent by at least two second spatial domain filters are different.

12. The message retransmission device according to claim 7, characterized in that: The processing unit is further configured to: Confirm that the transmission power of the retransmitted message 1 through the first spatial domain filtering exceeds a power threshold corresponding to a maximum allowed exposure, and the power threshold is less than or equal to a maximum power corresponding to the maximum allowed exposure.

13. A communication device, characterized in that: The method comprises a processor and a memory, wherein the memory is used to store computer instructions, and the processor executes the computer instructions, so that the user equipment executes the method according to any one of claims 1 to 6.

14. A device, characterized in that The apparatus includes a processor coupled to a memory. When the processor executes a computer program or instruction in the memory, the method according to any one of claims 1 to 6 is performed.

15. A computer-readable storage medium, characterized in that The computer-readable storage medium stores computer instructions, and the computer instructions instruct the user equipment to execute the method according to any one of claims 1 to 6.

16. A chip, characterized in that: include: A processor and an interface, configured to execute a computer program or instruction stored in a memory, and to perform the method according to any one of claims 1 to 6.

17. A computer program product, characterized in that The computer program product includes a computer program, and when the computer program is run on a computer, the computer is enabled to execute the message retransmission method according to any one of claims 1 to 6.

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