A communication system power control method, apparatus, device, and storage medium

Abstract

The application provides a communication system power control method, device, equipment and storage medium. The method comprises the following steps: determining a first initial power for sending an uplink random access signal according to uplink common channel power indication information sent by a satellite, and sending the uplink random access signal through a common channel according to the first initial power; when it is confirmed that a random access response sent by the satellite is not received, sending the uplink random access signal again by using preset maximum uplink transmission power on the common channel. The application is used for accurately controlling the power of the common channel and the dedicated channel, reducing the time delay of the communication system, reducing the transmission power of the system to the maximum extent under the premise of ensuring the communication quality, and finally achieving the purposes of reducing power consumption, reducing time delay and prolonging standby time.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of satellite communication, and in particular to a communication system power control method and device, equipment and a storage medium. BACKGROUND

[0002] Power control technology is a key technology to ensure normal operation of the system, improve system capacity and reduce harmful interference to other systems. Effective power control technology needs to reduce the terminal and satellite transmission power to the maximum extent on the premise of ensuring user communication quality, so as to reduce system interference, increase system margin and prolong the service life of terminal and satellite batteries. However, compared with the wireless channel of the ground mobile communication system, the transmission distance of the satellite wireless channel is far, the propagation delay is large, and the channel environment is more complex. In addition, due to the limited power of the satellite, it is more difficult to control the power of the satellite than the power of the ground base station. Therefore, the power control method in the ground mobile communication system cannot be applied to the satellite communication system.

[0003] The multiple climbing mechanism is used for power control in the 5G communication system. When the terminal does not receive the random access reply message after initiating random access, the terminal raises the random access channel transmission power by one step and reinitiates random access. If the random access reply message is not received again, the power is raised by one step again for retransmission. The above multiple power climbing mechanism will bring a large access delay, and is not suitable for satellite communication systems with large transmission delay. If the maximum transmission power is used for one-time access, it will increase the terminal power consumption, waste energy, and may also cause harmful interference to other systems. SUMMARY

[0004] The present application provides a communication system power control method, device, equipment and storage medium, which is used for precise control of the power of the common channel and the dedicated channel, reduces the time delay of the communication system, and maximizes the reduction of the transmission power of the system on the premise of ensuring the communication quality, so as to ultimately achieve the purpose of reducing power consumption, reducing time delay and improving standby time.

[0005] In a first aspect, the present application provides a communication system power control method applied to a terminal, comprising:

[0006] According to the uplink common channel power indication information sent by the satellite, a first initial power for sending the uplink random access signal is determined, and the uplink random access signal is sent through the common channel according to the first initial power;

[0007] When it is confirmed that the random access response sent by the satellite is not received, the uplink random access signal is sent again using the preset maximum transmission power of the common channel uplink.

[0008] In one or more possible embodiments, after retransmitting the uplink random access signal using the preset maximum uplink transmission power of the common channel, the method further comprises:

[0009] Upon receiving the random access response sent by the satellite, determining a second initial power of the uplink dedicated channel according to the dedicated channel power indication information in the random access response;

[0010] In one or more possible embodiments, after transmitting the uplink random access signal using the first initial power, the method further comprises:

[0011] Upon receiving the random access response sent by the satellite, determining a second initial power of the uplink dedicated channel according to the dedicated channel power indication information in the random access response;

[0012] Using the second initial power to perform initial transmission of data on the uplink dedicated channel.

[0013] In one or more possible embodiments, the uplink common channel power indication information is determined according to a downlink broadcast message sent by the satellite through the common channel.

[0014] In one or more possible embodiments, determining the first initial power for transmitting the uplink random access signal according to the uplink common channel power indication information sent by the satellite comprises:

[0015] Determining a path loss of the downlink broadcast message sent by the satellite through the common channel;

[0016] Determining a first expected power according to the uplink common channel power indication information sent by the satellite;

[0017] Determining the first initial power for transmitting the uplink random access signal according to the first expected power and the path loss.

[0018] In one or more possible embodiments, determining the second initial power of the uplink dedicated channel comprises:

[0019] Determining a second expected power according to the dedicated channel power indication information;

[0020] Determining a path loss of the random access response sent by the satellite;

[0021] Determining the second initial power of the uplink dedicated channel according to the second expected power and the path loss.

[0022] In one or more possible embodiments, using the maximum uplink transmission power of the common channel to perform initial transmission of data on the uplink dedicated channel comprises:

[0023] determining a third initial power of the uplink dedicated channel as the maximum uplink transmission power of the common channel;

[0024] using the maximum uplink transmission power of the common channel to perform initial transmission of data on the uplink dedicated channel.

[0025] In one or more possible embodiments, the method further comprises:

[0026] adjusting the power of subsequent transmission of data on the uplink dedicated channel according to the uplink closed loop power control method;

[0027] performing data transmission according to the adjusted power.

[0028] In a second aspect, the application further provides a power control method for a communication system, applied to a satellite, comprising:

[0029] sending a downlink broadcast message to a terminal using a fixed transmission power; the downlink broadcast message comprising uplink common channel power indication information;

[0030] upon receiving an uplink random access signal sent by the terminal, sending a random access response message to the terminal through a common channel; the random access response message comprising dedicated channel power indication information;

[0031] performing initial transmission of data using a preset initial transmission power of a downlink dedicated channel.

[0032] In a third aspect, the application further provides a power control device for a communication system, applied to a terminal, comprising:

[0033] a signal sending module, configured to determine a first initial power of sending an uplink random access signal according to uplink common channel power indication information sent by a satellite, and to send the uplink random access signal through a common channel according to the first initial power;

[0034] a response determining module, configured to, upon confirming that a random access response sent by the satellite has not been received, send the uplink random access signal again using a preset maximum uplink transmission power of the common channel.

[0035] In a fourth aspect, the application further provides a power control device for a communication system, applied to a satellite, comprising:

[0036] a broadcast sending module, configured to send a downlink broadcast message to a terminal using a fixed transmission power; the downlink broadcast message comprising uplink common channel power indication information;

[0037] The response message sending module is configured to send a random access response message to the terminal through a common channel when the uplink random access signal sent by the terminal is received, wherein the random access response message comprises dedicated channel power indication information.

[0038] The data transmission module is configured to perform initial transmission of data by using an initial transmission power of a preset downlink dedicated channel.

[0039] In a fifth aspect, the present application provides a communication system power control device, which comprises:

[0040] at least one processor; and a memory connected with the at least one processor in communication; wherein the memory stores instructions executable by the at least one processor, and the instructions are executed by the at least one processor to enable the at least one processor to perform the communication system power control method according to any one of the first aspect or the second aspect.

[0041] In a sixth aspect, the present application provides a storage medium, which stores a computer program for enabling a computer to perform the method according to any one of the first aspect or the second aspect.

[0042] According to the communication system power control method, device, equipment and storage medium provided by the present application, the power of the common channel and the dedicated channel can be precisely controlled, the time delay of the communication system is reduced, the transmission power of the system is reduced to the greatest extent under the premise of ensuring the communication quality, and finally the purposes of reducing power consumption, reducing time delay and prolonging standby time are achieved. BRIEF DESCRIPTION OF DRAWINGS

[0043] The accompanying drawings, which are incorporated into and form part of the specification, illustrate embodiments consistent with the present application and, together with the specification, serve to explain the principles of the application, and do not constitute an undue limitation on the present application.

[0044] Figure 1 An application environment schematic diagram according to the embodiment is provided;

[0045] Figure 2 A flowchart of the communication system power control method applied to the terminal according to the embodiment is provided;

[0046] Figure 3 A flowchart of terminal data transmission according to the embodiment is provided;

[0047] Figure 4 A flowchart of determining the first initial power according to the embodiment is provided;

[0048] Figure 5This is a flowchart for determining a second initial power according to an embodiment;

[0049] Figure 6 This is a flowchart illustrating a terminal data transmission method according to an embodiment.

[0050] Figure 7 This is a flowchart illustrating a power control method for a satellite communication system according to an embodiment.

[0051] Figure 8 This is a flowchart illustrating a satellite-terminal interaction according to an embodiment;

[0052] Figure 9 This is a block diagram of a communication system power control device applied in a terminal according to an embodiment;

[0053] Figure 10 This is a block diagram of a power control device for a satellite communication system, according to an embodiment.

[0054] Figure 11 This is a block diagram of a communication system power control device according to an embodiment;

[0055] Figure 12 This is a block diagram of a power control storage medium for a communication system according to an embodiment. Detailed Implementation

[0056] To make the objectives, technical solutions, and advantages of this invention clearer, the invention will be further described in detail below with reference to the accompanying drawings. Obviously, the described embodiments are only a part of the embodiments of this invention, and not all of them. Based on the embodiments of this invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this invention.

[0057] Satellite internet boasts advantages such as wide coverage and minimal susceptibility to natural disasters and physical attacks. It can be deeply integrated with terrestrial mobile communication networks, compensating for their insufficient coverage and forming a complementary, tightly integrated, and layered converged network system. Ultimately, this enables global information transmission and interaction. Satellite communication is a crucial application of satellite internet, primarily referring to data communication via or using satellites. It can be widely applied to mobile users, remote operations, and related cutting-edge applications.

[0058] The terminal device can be a device providing voice and / or data connectivity to users, handheld devices with or without wireless connection capabilities, or other processing devices connected to a wireless modem, etc. In different systems, the name of the terminal device can also be different, for example, in the 5G system, the terminal device can be called a user equipment (User Equipment, UE). The wireless terminal device can communicate with one or more core networks (Core Network, CN) through a radio access network (Radio Access Network, RAN). The wireless terminal device can be a mobile terminal device, such as a mobile phone (also known as a "cellular" phone) and a computer with a mobile terminal device, for example, it can be a portable, pocket, handheld, built-in computer or vehicle-mounted mobile device, which exchanges language and / or data with the radio access network. For example, personal communication service (Personal Communication Service, PCS) phones, cordless phones, session initiated protocol (Session Initiated Protocol, SIP) phones, wireless local loop (Wireless Local Loop, WLL) stations, personal digital assistants (Personal Digital Assistant, PDA) and other devices. The wireless terminal device can also be called a system, a subscriber unit, a subscriber station, a mobile station, a mobile, a remote station, an access point, a remote terminal, an access terminal, a user terminal, a user agent, a user device, and the like. The embodiments of the present application are not limited.

[0059] In related technologies, power control technology is a key technology to ensure normal operation of the system, improve system capacity, and reduce harmful interference to other systems. Effective power control technology needs to reduce the terminal and satellite transmission power to the maximum extent on the premise of ensuring user communication quality, to reduce system interference, increase system margin, and prolong the service life of the terminal and satellite batteries.

[0060] The power control mechanism using multiple ramping mechanisms is used in the 5G communication system. When the terminal does not receive the random access reply message after initiating the random access, the terminal increases the power of the random access channel by one step and reinitiates the random access. If the random access reply message is not received again, the power is increased by one step again for retransmission. However, compared with the wireless channel of the ground mobile communication system, the transmission distance of the satellite wireless channel is far, the propagation delay is large, and the channel environment is more complex. The above multiple power ramping mechanism will bring a large access delay, and is not suitable for the satellite communication system with large transmission delay. If the maximum transmission power is used for one-time access, the terminal power consumption will be increased, energy will be wasted, and harmful interference to other systems may also be caused. In addition, since the satellite power is limited, it is more difficult to control the power of the satellite than to control the power of the ground base station. Therefore, the power control method in the ground mobile communication system cannot be applied to the satellite communication system.

[0061] Based on the above problems, the present application provides a communication system power control method, device, equipment and storage medium, which is used for accurately controlling the power of the common channel and the dedicated channel, reducing the time delay of the communication system, and can reduce the transmission power of the system to the greatest extent under the premise of ensuring the communication quality, so as to ultimately achieve the purpose of reducing power consumption, reducing time delay and prolonging standby time.

[0062] As shown in Figure 1 , it is a schematic diagram of an application environment according to an embodiment of the present application, which includes a plurality of satellites located on the orbital plane in the satellite communication system and a terminal in communication with the satellite. Exemplarily, it includes the satellite 102_1, the satellite 102_2, …, the satellite 102_N in the figure, wherein N is a positive integer, and the size of N is determined according to specific needs and scenarios in practice. The terminal 101 realizes communication with other destination terminals 103 through the satellite; for example, the terminal 101 can send data to the satellite 102_2 through the uplink dedicated channel, and the satellite 102_2 sends data to the terminal 103 through the downlink dedicated channel after receiving the data sent by the terminal 101. It should be noted that the above system architecture is only an example of the system architecture applicable to the embodiment of the present application, and the system architecture applicable to the embodiment of the present application can also increase other entities or reduce some entities, which will not be described here. Figure 1 As shown in

[0063] The present application provides a communication system power control method, which is applied to a terminal, as shown in Figure 2 , which includes:

[0064] Step 201, determining a first initial power for sending an uplink random access signal according to the uplink common channel power indication information sent by the satellite, and sending the uplink random access signal through the common channel according to the first initial power.

[0065] In one or more possible embodiments, the uplink common channel power indication information is determined according to a downlink broadcast message sent by the satellite through a common channel; the terminal first receives a downlink broadcast message sent by the satellite through a common channel, wherein the downlink broadcast message carries power indication information of an uplink common channel of the terminal, and the power indication information of the uplink common channel can be any one of a preset fixed value, a preset range, a formula for determining power according to a distance between the satellite and the terminal, or other conditions for determining the power of the satellite, which are not listed one by one here; according to the uplink common channel power indication information, a first initial power of the uplink random access signal sent by the terminal through the common channel can be determined, after the first initial power is determined, the terminal sends the uplink random access signal to the satellite using the first initial power, and waits for a random access response returned by the satellite.

[0066] When it is confirmed that the random access response sent by the satellite is not received, the uplink random access signal is sent again using a preset maximum transmission power of the common channel uplink in step 202;

[0067] In one or more possible embodiments, when the terminal has sent the uplink random access signal to the satellite through the common channel and starts timing, it is found that the random access response sent by the satellite is not received within a preset time, which indicates that the first initial power of the random access signal is too small to support the transmission of the random access signal from the terminal to the satellite, and in order to reduce the access time between the terminal and the satellite, the uplink random access signal is sent again to the satellite using the preset maximum transmission power of the common channel uplink.

[0068] Based on the communication system power control method provided in the present application, the power of the common channel and the dedicated channel can be precisely controlled, the time delay of the communication system is reduced, the transmission power of the system is reduced to the greatest extent under the premise of ensuring the communication quality, and finally the purposes of reducing power consumption, reducing time delay, and prolonging standby time are achieved.

[0069] In one or more possible embodiments, after sending the uplink random access signal again using the preset maximum uplink transmission power of the common channel, the method further comprises: confirming that the random access response sent by the satellite is received, and using the maximum uplink transmission power of the common channel to perform initial transmission of data on the uplink dedicated channel; after the terminal sends the uplink random access signal again using the preset maximum transmission power, the random access response sent by the satellite is received within a preset time, and the preset maximum transmission power is determined as the power for initial transmission of data, for example, the maximum uplink transmission power PulMax of the terminal is the preset maximum transmission power in the application, and after the terminal sends the uplink random access signal for the second time and receives the random access response sent by the satellite, PulMax is directly determined as the power for initial transmission of data on the uplink dedicated channel.

[0070] In one or more possible embodiments, after sending the uplink random access signal using the first initial power, the method further comprises: Figure 3

[0071] Step 301: when the random access response sent by the satellite is received, the second initial power of the uplink dedicated channel is determined according to the dedicated channel power indication information in the random access response;

[0072] In one or more possible embodiments, after the terminal sends the uplink random access signal through the common channel, the second initial power of the uplink dedicated channel is determined according to the dedicated channel power indication information in the random access response sent by the satellite only when the random access response is received within a preset time.

[0073] Step 302: initial transmission of data on the uplink dedicated channel is performed using the second initial power.

[0074] In one or more possible embodiments, when the terminal sends data to the satellite for the first time after the terminal and the satellite establish a connection, the terminal sends the data to the satellite through the uplink dedicated channel using the second initial power that has been determined.

[0075] In one or more possible embodiments, the first initial power for sending the uplink random access signal is determined according to the uplink common channel power indication information sent by the satellite, as shown in Figure 4

[0076] Step 401: the path loss of the downlink broadcast message sent by the satellite through the common channel is determined.

[0077] ​​In one or more possible embodiments, when the satellite sends the downlink broadcast message to the terminal through the common channel, energy loss will inevitably occur due to the distance between the satellite and the terminal; therefore, the loss of the satellite sending the downlink broadcast message needs to be determined first to finally determine the power of the terminal sending the random access signal; meanwhile, the way of determining the path loss in the present application is not limited, as long as the specific result of the path loss can be finally obtained, which will not be described here.

[0078] Step 402, determining a first expected power according to the uplink common channel power indication information sent by the satellite;

[0079] In one or more possible embodiments, the first expected power is the expected random access power value expectedRxPower-RACH set by the satellite; the uplink common channel power indication information carried in the downlink broadcast message sent by the satellite can be any one of a preset fixed value, a preset range, a formula for determining the power according to the distance between the satellite and the terminal, or other conditions for determining the expected power of the satellite, as long as the first expected power can be finally determined, and other methods are not limited.

[0080] Step 403, determining a first initial power of sending the uplink random access signal according to the first expected power and the path loss.

[0081] In one or more possible embodiments, according to the first expected power obtained, that is, the expected random access power value expectedRxPower-RACH set by the satellite and the result obtained according to the path loss formula, the first initial power of the terminal sending the uplink random access signal through the common channel is finally obtained, and the uplink random access signal is sent to the satellite according to the first initial power.

[0082] In one or more possible embodiments, the second initial power of the uplink dedicated channel is determined, as shown in Figure 5 , including:

[0083] Step 501, determining a second expected power according to the dedicated channel power indication information;

[0084] Step 502, determining the path loss of the satellite sending the random access response;

[0085] Step 503, determining the second initial power of the uplink dedicated channel according to the second expected power and the path loss.

[0086] In one or more possible embodiments, the method for determining the second expected power through the dedicated channel power indication information is the same as the method for determining the first expected power through the uplink common channel power indication information in the embodiments, the second expected power in the application is the expected uplink dedicated channel power value of the satellite expectedRxPower-DCH, and the path loss of the satellite sending the random access response to the terminal is determined according to the path loss formula; finally, the second initial power of the uplink dedicated channel is determined according to the expected uplink dedicated channel power value of the satellite expectedRxPower-DCH and the path loss of the random access response, and the second initial power is determined as the initial transmission power Pul0 of the uplink dedicated channel in the application, which is used for the initial transmission of data through the uplink dedicated channel.

[0087] The initial transmission of data through the uplink dedicated channel is performed using the maximum uplink transmission power of the common channel, as shown in Figure 6 The initial transmission of data through the uplink dedicated channel is performed using the maximum uplink transmission power of the common channel, as shown in

[0088] Step 601, determining the third initial power of the uplink dedicated channel as the maximum uplink transmission power of the common channel;

[0089] Step 602, using the maximum uplink transmission power of the common channel to perform the initial transmission of data through the uplink dedicated channel.

[0090] In one or more possible embodiments, the terminal re-sends the random access signal using a preset maximum transmission power, and when the terminal receives the random access response sent by the satellite within a preset time, the preset maximum transmission power is used as the third initial power of the terminal uplink dedicated channel for sending data, and at this time, the third initial power does not need to be calculated, and the terminal directly uses the preset maximum power to perform the initial transmission of data through the uplink dedicated channel.

[0091] In one or more possible embodiments, it further includes: adjusting the power of subsequent data transmission through the uplink dedicated channel according to the uplink closed loop power control method; and performing data transmission according to the adjusted power. The uplink closed loop power control method refers to a technology that dynamically adjusts the power size of the transmitting end according to the receiving effect of the receiving end, which can partially reduce the influence of channel fast fading. Its main advantage is high control precision, and is used for fine adjustment of the transmission power in the communication process.

[0092] The application provides a communication system power control method, which is applied to a terminal and specifically comprises the following steps: receiving a downlink broadcast message sent by a satellite through a common channel, determining a first initial power of sending an uplink random access signal according to uplink common channel power indication information in the downlink broadcast message, and sending the uplink random access signal through the common channel according to the first initial power; when a random access response sent by the satellite is received, determining a second initial power of an uplink dedicated channel according to dedicated channel power indication information in the random access response; performing initial transmission of data on the uplink dedicated channel by using the second initial power; when the random access response sent by the satellite is not received, sending the uplink random access signal by using preset maximum uplink transmission power of the common channel; performing initial transmission of data on the uplink dedicated channel by using the maximum uplink transmission power of the common channel; adjusting power of subsequent transmission of data through the uplink dedicated channel according to an uplink closed loop power control method; and performing data transmission according to the adjusted power.

[0093] According to the communication system power control method provided by the application, the power of the common channel and the dedicated channel can be precisely controlled, the time delay of the communication system is reduced, the transmission power of the system is reduced to the maximum extent under the premise of ensuring the communication quality, and finally the purposes of reducing power consumption, reducing time delay and prolonging standby time are achieved.

[0094] Based on the same inventive concept, the application provides a communication system power control method applied to a satellite, as shown in the following figure. Figure 7 The method comprises the following steps.

[0095] In step 701, a fixed transmission power is used to send a downlink broadcast message to a terminal; the downlink broadcast message comprises uplink common channel power indication information.

[0096] In one or more possible embodiments, the fixed transmission power is a fixed transmission power PdlFix of a downlink common channel of the satellite, and the downlink broadcast message sent by the satellite to the terminal comprises uplink common channel power indication information and basic information required by the terminal to access the satellite.

[0097] In step 702, when an uplink random access signal sent by the terminal is received, a random access response message is sent to the terminal through the common channel; the random access response information comprises dedicated channel power indication information.

[0098] In step 703, initial transmission of data is performed by using preset initial transmission power of a downlink dedicated channel.

[0099] In one or more possible embodiments, the method further comprises the following steps: adjusting power of subsequent transmission of data through the downlink dedicated channel according to a downlink closed loop power control method; and performing data transmission according to the adjusted power.

[0100] The following describes the specific flow from the perspective of satellite and terminal interaction.

[0101] In one or more possible embodiments, as shown in Figure 8 includes:

[0102] Step 801, the communication system is initialized, the fixed transmission power PdlFix of the downlink common channel of the satellite is configured, the initial transmission power Pdl0 of the downlink dedicated channel of the satellite is configured, and the maximum transmission power PulMax of the terminal is configured;

[0103] Step 802, the satellite sends a downlink broadcast message to the terminal using the configured fixed transmission power PdlFix of the downlink common channel, and the message contains basic information required by the terminal to access the system;

[0104] Step 803, after the terminal receives the downlink broadcast message, the downlink path loss is calculated, the initial power Pra0 for uplink random access transmission is calculated according to the configured expected random access power value expectedRxPower-RACH, and then the first random access is initiated using the initial power Pra0;

[0105] Step 804, whether a random access response sent by the satellite is received within a preset time, if yes, step 805 is executed, and if no, step 806 is executed;

[0106] Step 805, the initial transmission power Pul0 of the uplink dedicated channel is calculated according to the downlink path loss calculated by the terminal and the configured expected uplink dedicated channel power value expectedRxPower-DCH, the data is initially transmitted through the uplink dedicated channel according to the initial transmission power Pul0, and step 807 is executed;

[0107] Step 806, random access is initiated again using the maximum transmission power PulMax of the uplink, it is determined that a random access response sent by the satellite is received within a preset time, the terminal takes the maximum transmission power PulMax as the initial transmission power of the uplink dedicated channel, and the data is initially transmitted;

[0108] Step 807, the satellite takes the initial transmission power Pdl0 of the configured downlink dedicated channel as the initial transmission power, and performs initial transmission of data;

[0109] Step 808, after the initial transmission of the uplink / downlink dedicated channel is completed, the data transmission power is adjusted using the uplink / downlink closed loop power control method during subsequent data transmission, and then the data is transmitted.

[0110] Based on the same inventive concept, the application further provides a power control device of a communication system, applied to a terminal, such as Figure 9 As shown in the figure, the device comprises:

[0111] The signal sending module 901 is configured to determine a first initial power for sending an uplink random access signal according to uplink common channel power indication information sent by a satellite, and send the uplink random access signal through a common channel according to the first initial power.

[0112] The response determination module 902 is configured to, when it is confirmed that no random access response sent by the satellite is received, send the uplink random access signal again by using preset maximum uplink transmission power of the common channel.

[0113] In one or more possible embodiments, after the uplink random access signal is sent again by using the preset maximum uplink transmission power of the common channel, the response determination module 902 is further configured to, when it is confirmed that the random access response sent by the satellite is received, perform initial transmission of data on an uplink dedicated channel by using the maximum uplink transmission power of the common channel.

[0114] In one or more possible embodiments, after the uplink random access signal is sent through the common channel according to the first initial power, the response determination module 902 is further configured to, when the random access response sent by the satellite is received, determine a second initial power of the uplink dedicated channel according to dedicated channel power indication information in the random access response; and perform initial transmission of data on the uplink dedicated channel by using the second initial power.

[0115] In one or more possible embodiments, the uplink common channel power indication information is determined according to a downlink broadcast message sent by the satellite through the common channel.

[0116] In one or more possible embodiments, the signal sending module 901 is specifically configured to determine path loss of the downlink broadcast message sent by the satellite through the common channel.

[0117] Determine a first expected power according to the uplink common channel power indication information sent by the satellite;

[0118] Determine a first initial power for sending the uplink random access signal according to the first expected power and the path loss.

[0119] In one or more possible embodiments, the response determination module 902 is specifically configured to determine a second expected power according to the dedicated channel power indication information.

[0120] Determine path loss of the random access response sent by the satellite;

[0121] determine a second initial power of the uplink dedicated channel according to the second expected power and the path loss.

[0122] In one or more possible embodiments, the response determining module 902 is specifically configured to determine the third initial power of the uplink dedicated channel as the common channel uplink maximum transmission power.

[0123] The data is initially transmitted on the uplink dedicated channel using the common channel uplink maximum transmission power.

[0124] In one or more possible embodiments, the device further comprises an uplink power adjusting module configured to adjust the power of subsequent data transmission on the uplink dedicated channel according to an uplink closed loop power control method, and transmit the data according to the adjusted power.

[0125] Based on the same inventive concept, the present application further provides a communication system power control device, which is applied to a satellite, as shown in Figure 10 The device comprises:

[0126] The broadcast sending module 1001 is configured to send a downlink broadcast message to a terminal using a fixed transmission power; the downlink broadcast message comprises uplink common channel power indication information.

[0127] The response message sending module 1002 is configured to send a random access response message to the terminal through a common channel when receiving an uplink random access signal sent by the terminal; the random access response information comprises dedicated channel power indication information.

[0128] The data transmission module 1003 is configured to initially transmit data using a preset initial transmission power of a downlink dedicated channel.

[0129] In one or more possible embodiments, the device further comprises a downlink power adjusting module configured to adjust the power of subsequent data transmission on the downlink dedicated channel according to a downlink closed loop power control method, and transmit the data according to the adjusted power.

[0130] Based on the same inventive concept, the present application further provides a communication system power control device, which comprises at least one processor; and a memory connected with the at least one processor in communication; wherein the memory stores instructions executable by the at least one processor, and the instructions are executed by the at least one processor to enable the at least one processor to perform the above-mentioned communication system power control method.

[0131] As shown in Figure 11 The device comprises a processor 1101, a memory 1102, a communication interface 1103 and a bus 1104. The processor 1101, the memory 1102 and the communication interface 1103 are connected with each other through the bus 1104.

[0132] Processor 1101 is configured to read instructions from memory 1102 and execute them, so that at least one processor can execute the communication system power control method provided in the above embodiments.

[0133] The memory 1102 is used to store various instructions and programs of the communication system power control method provided in the above embodiments.

[0134] Bus 1104 can be a Peripheral Component Interconnect (PCI) bus or an Extended Industry Standard Architecture (EISA) bus, etc. Buses can be categorized as address buses, data buses, control buses, etc. For ease of representation, Figure 11 The bus is represented by a single thick line, but this does not mean that there is only one bus or one type of bus.

[0135] Processor 1101 can be a central processing unit (CPU), a network processor (NP), a graphics processing unit (GPU), or any combination of CPU, NP, and GPU. It can also be a hardware chip. The aforementioned hardware chip can be an application-specific integrated circuit (ASIC), a programmable logic device (PLD), or a combination thereof. The aforementioned PLD can be a complex programmable logic device (CPLD), a field-programmable gate array (FPGA), a generic array logic (GAL), or any combination thereof.

[0136] In addition, this application also provides a storage medium, such as Figure 12 As shown, the storage medium stores a computer program that enables the computer to perform any of the methods described in the above embodiments.

[0137] The memory may include a readable medium in the form of volatile memory, such as random access memory (RAM) 1221 and / or cache memory 1222, and may further include read-only memory (ROM) 1223.

[0138] The memory can also include a plurality of program modules 1224 including but not limited to an operating system, one or more application programs, other program modules, and program data, each of which or a combination of which can include implementation of a network environment.

[0139] Those skilled in the art will appreciate that embodiments of the present application can be devised for a method, a system, or a computer program product. Accordingly, the present application can take the form of an entirely hardware embodiment, an entirely software embodiment or an embodiment combining software and hardware aspects. Furthermore, the present application can take the form of a computer program product on one or more computer readable storage media (including, but not limited to, disk storage, CD-ROMs, optical storage devices, etc.) embodying computer readable program code.

[0140] The present application is described in reference to the flowchart illustrations and / or block diagrams of methods, apparatus (systems) and computer program products according to embodiments of the application. It will be understood that each block of the flowchart illustrations and / or block diagrams, and combinations of blocks in the flowchart illustrations and / or block diagrams, can be implemented by computer program instructions. These computer program instructions can be provided to a processor of a general purpose computer, special purpose computer, embedded processing system or other programmable data processing apparatus to produce a machine, such that the instructions, which execute via the processor of the computer or other programmable data processing apparatus, create means for implementing the functions specified in the flowchart illustrations and / or block diagrams block or blocks. Figure 1 one or more functions specified in the flowchart illustrations and / or block diagrams block or blocks. Figure 1 means for performing the function specified by the flowchart illustrations and / or block diagrams block or blocks.

[0141] These computer program instructions can also be stored in a computer readable memory that can direct a computer or other programmable data processing apparatus to function in a particular manner, such that the instructions stored in the computer readable memory produce an article of manufacture including instructions which implement the flowchart illustrations and / or block diagrams block or blocks. Figure 1 one or more functions specified in the flowchart illustrations and / or block diagrams block or blocks. Figure 1 means for performing the function specified by the flowchart illustrations and / or block diagrams block or blocks.

[0142] These computer program instructions can also be loaded onto a computer or other programmable data processing apparatus to cause a series of operational steps to be performed on the computer or other programmable apparatus to produce a computer implemented process such that the instructions which execute on the computer or other programmable apparatus provide steps for implementing the flowchart illustrations and / or block diagrams block or blocks. Figure 1 one or more functions specified in the flowchart illustrations and / or block diagrams block or blocks. Figure 1 means for performing the function specified by the flowchart illustrations and / or block diagrams block or blocks.

[0143] Obviously, many modifications and variations of the present application are possible in light of the above teachings. It is, therefore, to be understood that within the scope of the appended claims and their equivalents, the application can be practiced otherwise than as specifically described.

Claims

1. A power control method for a communication system, applied to a terminal, characterized in that, The method comprises the following steps: determining a first initial power for sending an uplink random access signal according to uplink common channel power indication information sent by a satellite, and sending the uplink random access signal through a common channel according to the first initial power; when it is confirmed that no random access response sent by the satellite is received within a preset time, sending the uplink random access signal again by using preset maximum uplink transmission power of the common channel; when it is confirmed that the random access response sent by the satellite is received after the uplink random access signal is sent again, performing initial transmission of data on an uplink dedicated channel by using the maximum uplink transmission power of the common channel; wherein the random access response comprises dedicated channel power indication information.

2. The method of claim 1, wherein, After the uplink random access signal is sent through the common channel according to the first initial power, the method further comprises the following steps: when the random access response sent by the satellite is received within the preset time, determining a second initial power of the uplink dedicated channel according to the dedicated channel power indication information in the random access response; performing initial transmission of data on the uplink dedicated channel by using the second initial power.

3. The method of claim 1, wherein, The uplink common channel power indication information is determined according to downlink broadcast information sent by the satellite through the common channel.

4. The method of claim 3, wherein, The method of determining the first initial power for sending the uplink random access signal according to the uplink common channel power indication information sent by the satellite comprises the following steps: determining path loss of downlink broadcast information sent by the satellite through the common channel; determining a first expected power according to the uplink common channel power indication information sent by the satellite; determining the first initial power for sending the uplink random access signal according to the first expected power and the path loss.

5. The method of claim 2, wherein, The method of determining the second initial power of the uplink dedicated channel comprises the following steps: determining a second expected power according to the dedicated channel power indication information; determining path loss of the random access response sent by the satellite; determining the second initial power of the uplink dedicated channel according to the second expected power and the path loss.

6. The method of claim 1, wherein, The method of performing initial transmission of data on the uplink dedicated channel by using the maximum uplink transmission power of the common channel comprises the following steps: determining a third initial power of the uplink dedicated channel as the maximum uplink transmission power of the common channel; performing initial transmission of data on the uplink dedicated channel by using the maximum uplink transmission power of the common channel.

7. The method according to claim 1 or 3, characterized in that, The method further comprises the following steps: adjusting power of subsequent transmission of data through the uplink dedicated channel according to an uplink closed loop power control method; performing data transmission according to the adjusted power.

8. A power control device for a communication system, applied to a terminal, characterized in that, The device comprises: a signal sending module, configured to determine a first initial power for sending an uplink random access signal according to uplink common channel power indication information sent by a satellite, and send the uplink random access signal through a common channel according to the first initial power; a response determining module, configured to, when it is confirmed that no random access response sent by the satellite is received within a preset time, send the uplink random access signal again by using preset maximum uplink transmission power of the common channel; The response determination module is further configured to, after sending the uplink random access signal again, adopt the maximum uplink transmission power of the common channel to perform initial transmission of data on the uplink dedicated channel when it is confirmed that the random access response sent by the satellite is received, and the random access response comprises dedicated channel power indication information.

9. A power control device for a communication system, characterized by The device comprises: at least one processor; and a memory connected to the at least one processor in communication, wherein the memory stores instructions executable by the at least one processor, and the instructions are executed by the at least one processor to enable the at least one processor to perform the power control method of the communication system as claimed in any one of claims 1-7.

10. A storage medium, characterized by The storage medium stores a computer program, and the computer program is used to enable a computer to perform the method as claimed in any one of claims 1-7.

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