Communication method, device and system, medium and program product

Abstract

The embodiment of the invention provides a communication method, device and system, a medium and a program product. Wherein the satellite network equipment configures a transmitting parameter for transmitting a target element in a synchronization signal block SSB; and sending the SSB and / or sending the target element to the user equipment according to the transmission parameter. Wherein the transmitting parameter is used for enabling the signal-to-noise ratio of the target element received by the user equipment to be greater than or equal to the target signal-to-noise ratio. The target signal-to-noise ratio is the minimum signal-to-noise ratio of the target element in the SSB demodulated or detected by the user equipment. Therefore, the satellite network equipment configures the transmitting parameter of the target element for the SSB, so that the SNR of the SSB received by the user equipment is improved when the SNR of the SSB received by the user equipment is smaller than the target signal-to-noise ratio.

Description

Technical Field

[0001] The present application relates to the field of communication technology, and in particular to a communication method, device, system, medium and program product. Background Art

[0002] At present, satellite network equipment of non-terrestrial networks will periodically transmit synchronization signals and physical broadcast channel blocks (SSB), so that user equipment (UE) located in the coverage area of ​​the network equipment can receive SSB, synchronize with the network equipment in the time domain and access the network equipment.

[0003] However, due to downlink control channel fading or signal interference, the signal-to-noise ratio (SNR) of the SSB received by the UE may be lower than the SNR required to decode the SSB. The downlink control channel refers to the channel that sends information from the network device to the UE, such as the physical downlink control channel (PDCCH). The SNR required to decode the SSB refers to the minimum SNR for decoding the SSB.

[0004] If the SNR of the SSB received by the UE is lower than the SNR required for decoding the SSB, the user equipment will not be able to reliably decode the SSB, which will further cause the network equipment and the UE to be unable to synchronize in the time domain and the UE to be unable to access the network equipment, thereby affecting the communication quality between the network equipment and the UE. Summary of the invention

[0005] The embodiments of the present application provide a communication method, apparatus, system, medium and program product, which can improve the SNR of the SSB received by the UE, enable the UE to reliably decode the SSB, improve the probability of synchronization between the network device and the UE in the time domain, and improve the probability of successful access of the UE to the network device, thereby improving the communication quality between the network device and the UE.

[0006] In a first aspect, an embodiment of the present application provides a communication method, which is applied to a network device, specifically a satellite network device of a non-terrestrial network. The method includes: configuring the transmission parameters of the target element in the synchronization signal block SSB; according to the transmission parameters, sending the SSB and / or sending the target element to the user equipment. The transmission parameters are used to make the signal-to-noise ratio of the target element received by the user equipment greater than or equal to the target signal-to-noise ratio. The user equipment may be a UE. The target signal-to-noise ratio is the minimum signal-to-noise ratio for the user equipment to demodulate or detect the target element in the SSB.

[0007] Therefore, the network device configures the transmission parameters of the target element for the SSB, so that when the SNR of the SSB received by the UE is less than the target SNR, the SNR of the SSB received by the UE is increased, so that the signal-to-noise ratio of the target element received by the UE is greater than or equal to the transmission parameters of the target signal-to-noise ratio, thereby increasing the probability of the UE successfully decoding the SSB, thereby increasing the probability of synchronization between the network device and the UE in the time domain and the probability of the UE successfully accessing the network device, thereby improving the communication quality between the network device and the UE.

[0008] The target element includes one or more of the following: a primary synchronization signal PSS and a physical broadcast channel PBCH.

[0009] The transmission parameters include one or more of the following: transmission power, number of repeated transmissions, and beam direction of each antenna port in the satellite network device.

[0010] It can be understood that if the SNR of the target element received by the UE is lower than the target SNR, the SNR of the target element received by the UE can be improved by increasing the transmit power of the target element, or by merging the target elements by retransmitting the target elements multiple times to improve the SNR of the target element received by the UE. The beam direction of the antenna port can be adjusted so that the beam direction is toward the UE, thereby improving the signal strength received by the UE and improving the SNR of the target element received by the UE.

[0011] In a specific implementation, the satellite network device adjusts the configurable range of the SSB transmission power to a target range; Configure the transmit power of the target element based on the target range.

[0012] Furthermore, the maximum value of the target range is greater than the maximum value of the configurable power range of the SSB before adjustment. Thus, by increasing the configurable range of the SSB transmission power, the maximum transmission power of the SSB is increased, thereby increasing the SNR of the target element received by the UE.

[0013] In another specific implementation, if the target signal-to-noise ratio is greater than the reference signal-to-noise ratio, the satellite network device adjusts the configurable range of the SSB transmission power to the target range, and the reference signal-to-noise ratio indicates the SNR received by the user equipment when the SSB is sent with the maximum value of the configurable power range of the SSB before adjustment.

[0014] Furthermore, when the target signal-to-noise ratio is less than or equal to the reference signal-to-noise ratio, the configurable range of the SSB transmission power meets the requirements and no configuration is required. This ensures that the SNR of the target element received by the UE is greater than the target SNR while avoiding excessively increasing the maximum transmission power of the SSB and wasting resources.

[0015] In a specific use, the satellite network device adjusts the power configuration range of ss-PBCH-BlockPower to a target range.

[0016] In another specific implementation, the satellite network device obtains the power offset parameter of the PBCH or demodulation reference signal DRMS ​​in the SSB relative to the PSS or the secondary synchronization signal block SSS; based on the power offset parameter of the PBCH or DRMS ​​relative to the PSS or SSS, the transmit power of the target element is determined. This method can optimize resource allocation and avoid resource waste as much as possible on the basis of ensuring that the SNR of the target element received by the UE is greater than the target SNR.

[0017] Optionally, based on the target signal-to-noise ratio, a target power bias parameter of PBCH or DRMS ​​relative to PSS or SSS is determined; based on the target power bias parameter, a preset power bias parameter corresponding to the target power bias parameter is filtered out from a preconfigured power bias table; the power bias table includes multiple preset power bias parameters.

[0018] In another specific implementation, the satellite network equipment can configure the number of repeated transmissions of PBCH in a preset time slot; based on the number of repeated transmissions, the PBCH is repeatedly transmitted to the user equipment using gap symbols, the time slot includes multiple symbols, and the gap symbols are symbols not occupied by SSB in the preset time slot.

[0019] For example, in a specific implementation, a time slot includes multiple OFDM symbols, and the satellite network device uses the interstitial OFDM symbols of the time slot where the PSS is located in the SSB to repeatedly transmit the PBCH. Thus, the user equipment can improve the SNR of the PBCH by combining the PBCH transmitted multiple times.

[0020] In another specific implementation, SSB is transmitted on n antenna ports, where n is an integer greater than 1, and the transmission parameter is the beam direction of each antenna port, and the precoding coefficient of each antenna port is determined; based on the precoding coefficient and the transmission power of each antenna port, the phase and amplitude of the transmission signal of each antenna port are configured; based on the phase and amplitude of the transmission signal of each antenna port, the SSB is sent to the user equipment.

[0021] Therefore, the satellite network equipment can adjust the beam direction in the n antenna ports so that the beam direction is toward the user equipment, thereby improving the SSB received by the user equipment by improving the signal integration.

[0022] In a second aspect, an embodiment of the present application provides a communication method, which is applied to a user equipment of a low earth orbit satellite system, and the method includes: Receive the SSB and / or the target element in the SSB; determine the SNR of the target element; if the SNR of the target element is greater than or equal to the target signal-to-noise ratio, decode or detect the target element; the target signal-to-noise ratio is the signal-to-noise ratio required for the user equipment to demodulate or detect the target element in the SSB.

[0023] Therefore, when the user equipment compares the SNR of the target element and finds that it is greater than the target signal-to-noise ratio, the user equipment decodes or detects the target element, which helps to improve the success probability of decoding or detecting the target element.

[0024] In a specific implementation, if the SNR of the target element is less than the target signal-to-noise ratio, a response message is fed back to the satellite network device, where the response message is used to indicate that the SNR of the target element is less than the target signal-to-noise ratio.

[0025] Optionally, the target element includes one or more of the following: PSS and PBCH.

[0026] In another specific implementation, if the target element is received p times within a preset time slot, and p is greater than or equal to 1; the received signals of each target element are combined, and the combined SNR is used as the SNR of the target element.

[0027] In another specific implementation, a received signal of a target element sent by n antenna ports is obtained; the n antenna ports are n antenna ports of a satellite network device, n is greater than or equal to 1, and n is an integer; the received signals of the target element of the n antenna ports are combined to obtain an SNR of the target element.

[0028] In a third aspect, an embodiment of the present application provides a communication device, which is applied to a satellite network device of a non-terrestrial network, and the communication device includes a communication device and a processing device; The processing device is used to configure the transmission parameters of the target element in the synchronization signal block SSB; The transmission parameters are used to make the signal-to-noise ratio of the target element received by the user equipment greater than or equal to the target signal-to-noise ratio, where the target signal-to-noise ratio is the signal-to-noise ratio required for the user equipment to demodulate or detect the target element in the SSB; The communication device is used to send SSB and / or target element to the user equipment according to the transmission parameters.

[0029] In a fourth aspect, an embodiment of the present application provides a communication device, which is applied to a user equipment, and the communication device includes a communication device and a processing device; A communication device for receiving an SSB and / or a target element in an SSB; A processing device is used to determine the SNR of the target element; if the SNR of the target element is greater than or equal to a target signal-to-noise ratio, decode or detect the target element; the target signal-to-noise ratio is the signal-to-noise ratio required by the user equipment to demodulate or detect the target element in the SSB.

[0030] In a fifth aspect, an embodiment of the present application provides a communication system, comprising a satellite network device and a user device; the satellite network device executes a communication method as described in any one of the first aspects, and the user device executes a communication method as described in any one of the second aspects.

[0031] On the sixth aspect, an embodiment of the present application provides a computer storage medium for storing a computer program, which, when executed, is used to implement a communication method as described in any one of the first aspect or the second aspect.

[0032] Seventh embodiment of the present application provides a computer program product containing instructions, which, when executed on at least one computing device, enables the at least one computing device to implement a communication method as described in any one of the first aspect or the second aspect. BRIEF DESCRIPTION OF THE DRAWINGS

[0033] Figure 1 A schematic diagram showing that a network device periodically broadcasts SSB and system information block 1; Figure 2 It is a schematic diagram of the structure of SSB; Figure 3 An interaction diagram of a communication method provided in an embodiment of the present application; Figure 4 A schematic diagram showing that the beam direction of each antenna port provided in an embodiment of the present application is toward the direction of UE2; Figure 5 A schematic diagram of a structure for retransmitting multiple SSBs within a preset time slot provided in an embodiment of the present application; Figure 6 A schematic diagram of another structure for retransmitting multiple SSBs within a preset time slot provided in an embodiment of the present application Fig. 7A A schematic diagram of a structure for retransmitting SSB within a preset time slot provided in an embodiment of the present application; Figure 7B A schematic diagram of another structure of retransmitting SSB within a preset time slot provided in an embodiment of the present application; Figure 8 A schematic diagram of a structure for retransmitting SSB within a preset time slot provided in another embodiment of the present application; Fig. 9 A schematic diagram of a method for implementing the precoding technology provided in an embodiment of the present application; Fig.10 A schematic diagram of the hardware structure of a network device provided in an embodiment of the present application; Fig.11 An example diagram of the composition of a UE provided in an embodiment of the present application; Fig.12 A schematic block diagram of a communication device provided in an embodiment of the present application. DETAILED DESCRIPTION

[0034] The technical solutions in the embodiments of the present application will be described clearly and completely below in conjunction with the drawings in the embodiments of the present application. The terms used in the following embodiments are only for the purpose of describing specific embodiments and are not intended to be used as limitations on the present application. As used in the specification and the appended claims of the present application, the singular expressions "one", "a kind", "said", "above", "the" and "this" are intended to also include expressions such as "one or more", unless there is a clear contrary indication in the context. It should also be understood that in the embodiments of the present application, "one or more" refers to one, two or more; "and / or" describes the association relationship of the associated objects, indicating that three relationships may exist; for example, A and / or B can represent: A exists alone, A and B exist at the same time, and B exists alone, where A and B can be singular or plural. The character " / " generally indicates that the objects associated before and after are in an "or" relationship.

[0035] References to "one embodiment" or "some embodiments" etc. described in this specification mean that a particular feature, structure or characteristic described in conjunction with the embodiment is included in one or more embodiments of the present application. Thus, the phrases "in one embodiment", "in some embodiments", "in some other embodiments", "in some other embodiments", etc. that appear at different places in this specification do not necessarily refer to the same embodiment, but mean "one or more but not all embodiments", unless otherwise specifically emphasized in other ways. The terms "including", "comprising", "having" and their variations all mean "including but not limited to", unless otherwise specifically emphasized in other ways.

[0036] The multiple involved in the embodiments of the present application means greater than or equal to two. It should be noted that in the description of the embodiments of the present application, the words "first", "second", etc. are only used for the purpose of distinguishing the description, and cannot be understood as indicating or implying relative importance, nor can they be understood as indicating or implying an order.

[0037] like Figure 1 As shown, in a low earth orbit (LEO) satellite system, network device 1 periodically broadcasts SSB and system information block 1 (SIB1), so that UE2 located within the signal coverage of the network device can synchronize with the network device in the time domain and access the network according to the received SSB and SIB1.

[0038] like Figure 2As shown in Figure 1, SSB includes primary synchronization signal (PSS), secondary synchronization signal (SSS), and physical broadcast channel (PBCH). Figure 2 As shown in the figure, SSB occupies 4 orthogonal frequency division multiplexing (OFDM) symbols in the time domain and 240 subcarriers in the frequency domain. Among them, the UE can use PSS and SSS to synchronize with the network equipment in the time domain, and can use the system information carried on PBCH, such as the master information block (MIB), to decode the SIB1 broadcast by the network equipment to obtain the basic configuration information required to access the network equipment, so that after the UE is synchronized with the network equipment, it can access the network equipment using the basic configuration information obtained by decoding.

[0039] However, due to downlink control channel fading or signal interference, the SNR of the SSB received by UE2 may be lower than the SNR required for detecting PSS or decoding PBCH. For ease of explanation, the SNR required for detecting PSS or decoding PBCH is called the target SNR. Here, the target SNR refers to the minimum SNR required to correctly detect PSS or successfully demodulate PBCH.

[0040] SNR is the ratio of signal power to noise power and is expressed in decibels (dB).

[0041] The downlink control channel refers to a channel for sending information from a network device to a UE, for example, the downlink control channel is a physical downlink control channel PDCCH.

[0042] Exemplary description: Table 1 is a schematic diagram of the SNR received by the UE in different S-band scenarios of the LEO-600 satellite system, and the SNR required by the UE to detect the PSS and decode the PBCH.

[0043] Table 1

[0044] Among them, SSB is transmitted under the condition of subcarrier spacing (SCS) of 15KHz in scenario 1, scenario 2 and scenario 3. The transmission power of SSB configured in scenario 3 is lower than the transmission power of SSB block configured in scenario 1 and scenario 2, the transmission power of PBCH configured is lower than the transmission power of PBCH configured in scenario 1 and scenario 2, and the transmission power of PSS or SSS configured is lower than the transmission power of PSS or SSS configured in scenario 1 and scenario 2.

[0045] It can be found from Table 1 that the SNR of SSB received by UE in scenario 3 is much lower than the SNR of SSB received by UE in scenario 1 or scenario 2. The target SNR for demodulating PBCH is -7.3dB. The SNR of SSB received by UE in scenario 1 or scenario 2 exceeds the target SNR for demodulating PBCH by 5.4dB, which meets the demodulation requirements. However, in scenario 3, the SNR of SSB received by UE is 2.6dB away from the target SNR for demodulating PBCH. Therefore, UE cannot successfully demodulate PBCH in scenario 3.

[0046] Similarly, the target SNR for detecting PSS is -3.7dB. In scenario 1 or scenario 2, the SNR of SSB received by the UE exceeds -3.7dB by 1.8dB, which meets the detection requirement. However, in scenario 3, the SNR of SSB received by the UE is still 6.2dB away from the target SNR for detecting PSS, and the accuracy of UE detecting PSS in scenario 3 is low.

[0047] If the UE cannot successfully detect the PSS or demodulate the PBCH, the network device and the UE will not be synchronized in the time domain and the UE will not be able to access the network device, thereby affecting the communication quality between the network device and the UE.

[0048] In view of this, an embodiment of the present application provides a communication method for improving the success rate of UE successfully detecting PSS or demodulating PBCH, improving the probability of synchronization between network equipment and UE in the time domain, and improving the success probability of UE accessing the network equipment, thereby improving the communication quality between the network equipment and the UE.

[0049] To facilitate understanding and explanation, the application scenario of the communication method provided in the embodiment of the present application is first introduced.

[0050] The embodiment of the present application provides a communication system for implementing the communication method provided in the embodiment of the present application. The communication system may be a fifth generation (5G) communication system, or a hybrid architecture of LTE and 5G, or a 5G new wireless (5G NewRadio, 5G NR) system, or a LEO satellite system and a new communication system that will emerge in the future development of communication.

[0051] An example of a communication system is Figure 1 As shown, it includes network equipment 1 and UE 2.

[0052] In the embodiments provided in the present application, the network device 1 may be any device located on the network side and having wireless transceiver functions, including but not limited to: a satellite or aircraft in a non-territorial network (NTN), or may be other possible satellite network devices.

[0053] UE1 can be in various forms. For example, UE can be a mobile phone, a tablet computer, a computer with wireless transceiver function, a virtual reality (VR) terminal device, an augmented reality (AR) terminal device, a wireless terminal in industrial control, a vehicle-mounted terminal device, a wireless terminal in self-driving, a wireless terminal in remote medical, a wireless terminal in smart grid, a wireless terminal in transportation safety, a wireless terminal in smart city, a wireless terminal in smart home, a wearable terminal device, etc. UE can sometimes also be called terminal equipment, access terminal equipment, vehicle-mounted terminal, industrial control terminal, UE unit, UE station, mobile station, mobile station, remote station, remote terminal equipment, mobile device, UE terminal equipment, terminal equipment, wireless communication equipment, UE agent or UE device, etc. The terminal can also be a fixed terminal or a mobile terminal.

[0054] The above description is based on the example that the communication system includes a network device 1 and a UE 2. In other possible implementations, the communication system may include multiple UEs or multiple network devices. Alternatively, in other possible implementations, the network device 1 in the communication system may also be replaced by other forms of network devices, which are not limited to this. For ease of understanding, the following description is still based on the example of the interaction between the UE 2 and the network device 1.

[0055] Embodiment 1

[0056] See also Figure 3 , Figure 3 A communication method provided by an embodiment of the present application is shown. Figure 3 The communication method shown can be applied to Figure 1 The communication system shown in FIG. 1 may be applied to other possible communication systems. Figure 1The communication system shown in FIG. Figure 1 As shown, the process of the communication method includes the following steps: S301, network device 1 configures transmission parameters.

[0057] The transmission parameters provided in the embodiment itself refer to the configuration and / or settings used by the network device 1 to send the target element in the SSB. The transmission parameters directly affect the transmission quality and reception effect of the target element. Among them, the target element can be PSS or PBCH.

[0058] In the embodiment of the present application, the transmission parameters include but are not limited to: transmission power, number of repeated transmissions, and beam direction of each antenna port.

[0059] The number of repeated transmissions refers to the number of times the target element is repeatedly sent within a specific time length. For example, the number of times network device 1 repeatedly sends PBCH within a 1ms time slot is 4 times. In an embodiment of the present application, UE2 obtains the target element sent by network device 1 multiple times within a specific time length, and improves the SNR of the target element by combining the received signals of the received target elements.

[0060] For example, UE2 receives 4 PBCHs sent by network device 1 in a 1ms time slot. Among them, the SNR of the first PBCH received by UE2 is -3dB, the SNR of the second PBCH is -2dB, the SNR of the third PBCH is -1dB, and the SNR of the fourth PBCH is 0. UE2 can use the maximum combining ratio method to improve the SNR. The specific steps are: first convert the SNR to a linear scale, calculate the transmission weight of each PBCH, and the SNR of the first PBCH = 10 −3 / 10 ≈0.5012, the SNR of the second PBCH =10 −2 / 10 ≈0.6310, the SNR of the third PBCH = 1 0−1 / 10 ≈0.7943, the SNR of the fourth PBCH = 1. Then get the weights of the first PBCH, the second PBCH, the third PBCH and the fourth PBCH w 1. w 2. w 3 and w 4, 0.7080, 0.7943, 0.8912 and 1 respectively.

[0061] The combined SNR (SNR combined ) can be calculated by the following formula (1) as −1.357dB for the combined SNR.

[0062] (1) Thus, by combining the received signals of the four PBCHs, the initial PBCH can be improved from -3dB to -1.357dB. In summary, the network device 1 can increase the number of times the target element is sent within a specific time period to improve the SNR of the target element received by the UE2.

[0063] It should be noted that the above-mentioned method for merging the SNRs of the target elements is only a schematic representation. In actual use, those skilled in the art may also make adjustments, and the embodiments of the present application do not specifically limit it.

[0064] The network device 1 configures the transmission parameters of the target element in the SSB so that the SNR of the target element received by the UE2 is greater than or equal to the target SNR, thereby improving the success probability of detecting the PSS or decoding the PBCH.

[0065] In one example, if the transmission parameter is the transmission power of the target element, the network device 1 first determines the target SNR of the target element by means of system specifications or budget link simulation. Then, the network device 1 determines the initial transmission power corresponding to the target SNR based on the empirical value or the link simulation result. The network device 1 configures the initial transmission power and determines the initial actual SNR received by UE2.

[0066] The network device 1 determines the relationship between the initial actual SNR and the target SNR. If the initial actual SNR is lower than the target SNR, the network device 1 can increase the transmit power of the target element in the SSB to improve the SNR received by the UE, so that the SNR received by the UE is greater than or equal to the target SNR. This improves the reliability and success probability of UE2 demodulating the PBCH or detecting the PSS.

[0067] For example, if the initial transmit power determined by network device 1 is 20dBm, the initial actual SNR received by UE2 is 3dB, and the target SNR is 5dB. The initial actual SNR is less than the target SNR, and the transmit power of the target element needs to be increased. First, it is determined that the SNR gain to be increased is 2dB. From this, it can be determined that the increment of the transmit power of the target element is 2dBm, that is, the transmit power of the target element is 22dBm.

[0068] It can be understood that if the initial actual SNR is greater than the target SNR, the network device 1 can reduce the transmission power of the target element in the SSB to avoid wasting resources.

[0069] In specific applications, in the standard, such as the TS38.331 RRC layer protocol, network device 1 configures the transmit power of SSB through the ss-PBCH-BlockPower parameter in the Radio Resource Control (RRC) message. Then, based on the power offset value of the target element relative to the SSB transmit power, the purpose of configuring the transmit power of the target element in the SSB is achieved. For example, the transmit power of SSB configured by network device 1 is 20dBm, the target element is PSS, and the power offset value of PSS relative to SSB is 0dBm, then network device 1 sends PSS at a transmit power of 20dBm during actual transmission.

[0070] Further, the network device 1 may set a power offset value of the target element. For example, in the standard, the network device 1 may set a power offset value of the PSS relative to the SSB and a power offset value of the PBCH relative to the SSB through the PSS offset (pss-PowerOffset) and PBCH offset (pbch-PowerOffset) parameters. Then, the network device 1 may configure and adjust the transmit power of the PSS or PBCH based on setting the transmit power of the SSB through the ss-PBCH-BlockPower parameter in the RRC message.

[0071] Example 2: The transmission parameter may be the number of repeated transmissions (ie, the number of retransmissions) of the target element.

[0072] To ensure that the SNR of the SSB received by UE2 is greater than or equal to the target SNR and to reduce the number of retransmissions as much as possible to save resources, network device 1 first determines the target SNR. Then, network device 1 determines and configures the initial number of retransmissions corresponding to the target SNR. The initial actual SNR received by the UE under the initial number of retransmissions is obtained.

[0073] The network device 1 determines the relationship between the initial actual SNR and the target SNR. Based on the relationship between the initial actual SNR and the target SNR and the initial number of retransmissions, the number of retransmissions of the target element to be configured is determined. If the initial actual SNR is less than the target SNR, the number of retransmissions is increased based on the initial number of retransmissions, and the network device 1 reconfigures the number of retransmissions of the target element to be the sum of the initial number of retransmissions and the increased number of retransmissions.

[0074] For example, if the initial number of retransmissions is 2, the initial actual SNR received by UE2 is 3dB, and the target SNR is 5dB. The SNR gain between the target SNR and the initial actual SNR is 2dB. If each retransmission can increase the SNR gain by 0.5dB, to achieve a 2dB SNR gain, the increased number of retransmissions is 4. That is, the number of retransmissions reconfigured by network device 1 is 6.

[0075] Specifically, after the network device 1 determines the number of retransmissions of the target element, in the protocol (for example, in the TS38.331 protocol), the network device 1 can set the number of retransmissions of the SSB to n1 through the SSB reset parameter (ssb-Repetition) in the RRC message. Figure 1 As shown, after the network device adjusts the number of retransmissions of SSB, the number of retransmissions of target elements on SSB, such as PSS and SSS, is also configured synchronously.

[0076] Furthermore, after the network device 1 configures the number of retransmissions, the network device 1 will dynamically adjust the number of retransmissions according to the feedback from UE2 to ensure that the SNR of the SSB received by the UE is greater than or equal to the target SNR, and reduce the number of retransmissions as much as possible to save resources. Specifically, if the SNR received by the UE is still less than the target SNR after the number of retransmissions is adjusted, the number of retransmissions of the SSB can be reset through the ssb-Repetition parameter to increase the number of retransmissions of the SSB, thereby increasing the number of retransmissions of the target element.

[0077] Example 3: Network device 1 configures the beam direction of each antenna port, and adjusts the SNR of the SSB received by the UE by changing the beam direction of each antenna port.

[0078] In current communication networks, multi-antenna technology is widely used, that is, multiple antennas are used to simultaneously transmit and receive the same SSB signal to improve the capacity and reliability of the communication network. For example, if the transmission power of SSB is p, and the network device includes n antenna ports, the transmission power of each antenna port is p / n, where n>1 and n is an integer.

[0079] The network device 1 can adjust the beam directions of the n antenna ports so that each antenna port forms a beam in a specific direction to improve the intensity in that direction. For example, Figure 4 It is illustrated that by configuring the beam direction of each antenna port, the beam direction of each antenna port is directed toward the direction of UE2. Thus, the signal strength in the direction of UE2 is improved, and the SNR of the target element received by UE2 is improved.

[0080] For example, if the SSB transmission power p=20dBm, Figure 4 Four antenna ports are shown, and the transmission power of each antenna port is 5dBm. Figure 1 Only beam 1 is directed toward UE2, and the initial actual SNR received by UE2 is 3dB. Figure 4 All four beams are directed toward UE2, and the beamforming gain is 4. The new SNR received by UE2 is 6 dB.

[0081] In specific applications, the network device 1 can configure the beam direction of each antenna port through specific parameters in the protocol (for example, in the TS38.331 protocol). For example, the SSB index (ssb-BeamIndex) parameter is used to specify the beam index of the SSB, and the SSB beam direction (ssb-BeamDirection) parameter is used to specify the beam direction of the SSB as the target direction.

[0082] The embodiments of the present application may also configure the emission parameters of the target element in other ways, which are not specifically limited in the present application.

[0083] S302. Network device 1 sends SSB or sends a target element in SSB to UE2 according to the transmission parameters.

[0084] S303. UE2 decodes or detects the target element according to the received SNR of the target element.

[0085] After receiving the SSB or target element sent by the network device 1, UE2 measures the SNR of the target element.

[0086] In an example, UE2 receives the signal of the target element four times, combines the received signal of the target element each time, and uses the SNR of the combined target element as the SNR of the decoded or detected target element.

[0087] In another example, UE2 measures the SNR of the received signal of the target element corresponding to each antenna port, combines the received signals of the target elements of n antenna ports, and uses the SNR of the combined target element as the SNR of the decoded or detected target element.

[0088] The embodiment of the present application may also measure the SNR of the target element by other methods, which are not specifically limited in the embodiment of the present application.

[0089] After UE2 obtains the SNR of the target element, it can directly decode or detect the target element.

[0090] In the embodiment of the present application, the transmission parameters are configured to make the SNR received by UE2 greater than or equal to the target SNR. That is, the received SNR is ensured to be high, the received signal strength is higher than the noise level, the signal is clearer, and the noise interferes less with the signal, which helps to reduce the bit error rate. Therefore, UE2 can reliably detect and decode the target element.

[0091] However, considering that there may be other interference in actual use, the SNR received by UE2 is less than the target SNR, that is, the received SNR is a low SNR, the noise has a greater impact on the signal strength, the bit error rate is high, and UE2 may not be able to successfully detect or decode the target element.

[0092] Therefore, after receiving the SNR, UE2 first compares the received SNR of the target element with the target SNR. If the received SNR is ≥ the target SNR, the target element is decoded.

[0093] If UE2 determines that the SNR received by the target element is less than the target SNR, it feeds back a response message to network device 1. The response message indicates that the SNR received by UE2 is less than the target SNR, and network device 1 can reconfigure the transmission parameters based on step S301 to improve the SNR received by UE2.

[0094] UE2 decodes or detects the target element. The specific detection method may be: If the target element is PSS or SSS, UE2 uses the known PSS or SSS sequence and the received SSB to perform correlation operations, calculate the correlation value, and find the peak position. If the peak exceeds the preset peak threshold, the detection is determined to be successful, otherwise the detection is determined to be failed.

[0095] If the target element is PBCH, UE2 demodulates PBCH and extracts the data symbols of PBCH. Then UE2 uses the demodulation reference signal (DMRS) in PBCH to perform channel estimation and obtain the channel response matrix. Among them, the channel response distance is used to describe the channel characteristics from network device 1 to UE2. Then UE2 uses the channel response matrix to perform channel equalization on the demodulated data symbols and restore the originally transmitted symbols. If the recovered original transmitted symbols are decoded with the known encoding method, the original data is restored. Perform a cyclic redundancy check on the decoded data, or judge whether the MIB signal in the decoded PBCH is reasonable to determine whether the detection is successful.

[0096] S304 . UE2 sends a connection request to network device 1 according to the result of decoding or detecting the target element.

[0097] If UE2 determines that the target element is successfully decoded or detected, it sends a connection request to network device 1 to request to establish a connection with network device 1.

[0098] S305: Network device 1 establishes a connection with UE2.

[0099] It should be noted that the initial actual SNR provided in the embodiment of the present application refers to the SNR received by UE2 when the target element is transmitted before the network device 1 configures the transmission parameters. The target element transmitted before configuring the transmission parameters may be a target element transmitted with transmission parameters such as initial transmission power, initial number of retransmissions, or initial beam direction.

[0100] In summary, the communication method provided in the embodiment of the present application can improve the SNR of the target element received by the UE by configuring the transmission parameters of the target element in the SSB, such as increasing the transmission power of the target element, increasing the number of retransmissions of the target element, or adjusting the beam direction of multiple antenna ports transmitting the target element. Furthermore, the SNR of the target element received by the UE is higher than the target signal-to-noise ratio, which can improve the success rate of decoding or detecting the target element, enhance the downlink network coverage, and improve the communication quality.

[0101] Embodiment 2 In the embodiment of the present application, the network device 1 first determines the transmission parameters of the target element, and then executes step S301.

[0102] Specifically, the network device 1 can adjust the configurable range of the transmission power of the SSB (i.e., the power configuration range of the SSB). For the convenience of description, the power configuration range of the SSB before adjustment is referred to as the initial configuration range, and the power configuration range after adjustment is referred to as the target range. In the embodiment of the present application, the network device 1 adjusts the power configuration range of the SSB from the initial configuration range to the target range.

[0103] The initial power range is (a1, a2) and the target range is (b1, b2). Where a1 < a2 and b1 < b2, a1 can be less than b1 or greater than or equal to b1, and a2 can be less than b2 or greater than or equal to b2. Those skilled in the art can make adjustments as needed. It should be noted that the units of the initial power range (a1, a2) and the target range (b1, b2) are dBm.

[0104] It is understandable that when the maximum value of the target range is greater than the maximum value of the initial configuration range, network device 1 can configure a larger transmit power for SSB. For example, the initial power range is (-60,50) and the target range is (-60,60). When the power configuration range of SSB is adjusted from (-60,50) to (-60,60), network device 1 can configure a transmit power greater than or equal to 50dBm for SSB, for example, the transmit power configured for SSB is 55dBm. Increasing the transmit power of SSB will simultaneously increase the transmit power of the target element, thereby improving the SNR of the target element received by UE2.

[0105] Considering the channel fading and signal interference of the downlink control channel, when SSB is transmitted on the downlink control channel, the transmit power will be reduced and the noise power will be increased, thereby reducing the SNR of the SSB received by the UE, such as scenario 3 described in Table 1. Network device 1 increases the maximum value of the power configuration range of SSB to configure a larger transmit power for SSB, thereby Improve the SNR of the target element received by UE2.

[0106] It is understandable that when the maximum value of the target range is less than the maximum value of the initial configuration range, the network device 1 can reduce the maximum transmission power of the SSB configuration. Reducing the maximum transmission power of the SSB helps to reduce energy consumption, extend battery life, and help reduce unnecessary high-power transmissions, improving system stability and reliability. For example, the initial power range is (-60, 50), the target range is (-60, 40), and the power configuration range of the SSB is adjusted from (-60, 50) to (-60, 40). The network device 1 will limit the maximum transmission power of the SSB to no more than 40dBm, reducing the maximum transmission power of the SSB.

[0107] For example, in scenarios 1 and 2 shown in Table 1, the transmit power of SSB is configured within the current initial power range, and the SNR of the target element received by UE2 is greater than the target SNR. At this time, the network device 1 can reduce the maximum value of the power configuration range of SSB and control the maximum transmit power of SSB to reduce energy consumption and improve battery life.

[0108] Furthermore, in order to make the SNR of the target element sent by the network device 1 received by UE2 greater than or equal to the target SNR, and reduce energy consumption and improve battery life, the network device 1 first determines the relationship between the target SNR and the reference SNR received by UE2. The reference SNR is the SNR of the target element received by the UE when the transmission power of the SSB is the maximum value of the initial configuration range.

[0109] When the target SNR is greater than the reference SNR, the network device 1 adjusts the power configuration range of the SSB to the target range. The maximum value of the target range is greater than the maximum value of the initial configuration range. The reason is that the target SNR is greater than the reference SNR, that is, within the current power configuration range of the SSB, the SNR of the target element received by the UE2 is always less than the target SNR, and the UE2 cannot reliably decode or detect the target element. Therefore, the maximum value of the power configuration range of the SSB can be increased to increase the maximum transmission power of the SSB.

[0110] Furthermore, when the target SNR is greater than the reference SNR, the maximum value of the target range can be determined based on the difference between the target SNR and the reference SNR. For example, as shown in scenario 3, if the target element is PSS, where the target SNR of PSS is -3.7dB, and the reference SNR of PSS received by the UE is -9.9dB, the difference between the target SNR and the reference SNR is 6.2dB, that is, the SNR of PSS received by the UE is 6.2dB away from the target SNR. Based on the difference between the target SNR and the reference SNR, determine the power increment required for the UE to detect PSS, for example, a power increment of 6.2dBm. The UE can determine the maximum value of the target range based on the required power increment, for example, the maximum value of the initially configured range + 10dBm.

[0111] That is, network device 1 determines the maximum value of the target range by the difference between the target SNR and the reference SNR. On the basis of ensuring that the SNR of the target element received by the UE is greater than the target SNR, it can try to avoid excessively increasing the maximum transmission power of the SSB and causing waste of resources.

[0112] Furthermore, the maximum value of the target range cannot exceed a preset power value.

[0113] The preset power value is a transmission power value determined by those skilled in the art based on the current operation requirements of the network device or the battery life, etc. If the maximum value of the target range exceeds the preset power value, the normal operation of the network device or the normal use of the battery will be affected. For example, if the preset power value is 60dbm, the maximum value of the target range is less than or equal to 60dbm.

[0114] In specific implementation, the network device 1 may adjust the configurable power range of ss-PBCH-BlockPower to a target range in a protocol (eg, TS38.331 RRC layer protocol).

[0115] The above method of improving the SNR received by UE2 from network device 1 is simple to operate and has little impact on the communication system. It can be achieved by only making minor changes to the existing protocol and coverage enhancement (CE) scenario frame structure, which helps to maintain the stability of the communication system.

[0116] Embodiment 3 The embodiment of the present application optimizes resource allocation and avoids resource waste by adjusting the transmit power of the PSS and the transmit power of the PBCH.

[0117] At present, the power offset of PSS and PBCH is 0, which means that the transmit power of PSS is the same as the transmit power of PBCH. However, in some scenarios, such as scenario 3 described in Table 1, the target SNR for detecting PSS in UE2 is -3.7dB, while the target SNR for decoding PBCH is -7.3dB. That is, the transmit power required for UE2 to detect PSS is higher than the transmit power required to decode PBCH. If the power offset of PSS and PBCH is 0, that is, the transmit power of PBCH is equal to the transmit power of PSS. It can be understood that in order to meet the requirements for detecting PSS, the transmit power of PSS needs to be as large as possible. At this time, the transmit power of PBCH is also large, but the power required for actually decoding PBCH is small, so it will cause a waste of resources.

[0118] In view of this, the network device 1 can configure the power offset parameters of PBCH or DRMS ​​relative to PSS or SSS in SSB, including one or more of the following: power offset parameters of PBCH relative to PSS, or power offset parameters of PBCH relative to SSS, or power offset parameters of DRMS ​​relative to PSS, or power offset parameters of DRMS ​​relative to SSS.

[0119] For ease of explanation, the power offset parameter of PBCH relative to PSS is used as an example for schematic explanation below. It can be understood that in actual use, the power offset parameter of PBCH relative to PSS can be replaced by the power offset parameter of PBCH relative to SSS, or the power offset parameter of DRMS ​​relative to PSS, or the power offset parameter of DRMS ​​relative to SSS.

[0120] In one example, the network device 1 can determine the power offset parameter of the PBCH relative to the PSS based on the target SNRs corresponding to the detected PSS and the decoded PBCH respectively. The network device 1 configures the power offset parameter of the PBCH relative to the PSS. Specifically, in the standard, the power offset of the PBCH relative to the PSS can be configured by the ssb-PBCH-PowerOffset parameter in the RRC message. Thus, the network device 1 can determine the transmit power of the PBCH or PSS based on the power offset parameter of the PBCH relative to the PSS. For ease of explanation, the target SNR of the PSS is referred to as the first target SNR, and the target SNR of the PBCH is referred to as the second target SNR.

[0121] For example, for scenario 3 in Table 1. The first target SNR for UE2 to detect PSS is -3.7dB, and the second target SNR for UE2 to decode PBCH is -7.3dB. The power offset value between the first target SNR and the second target SNR is 3.6dB. Network device 1 can configure the power offset parameter of PBCH in SSB relative to PSS to be -3.6dB. If the power offset parameters of PSS and SSS are 0, and the transmit power of SSB is 9dbm, network device 1 can obtain the transmit power of PSS and the transmit power of PBCH.

[0122] However, considering that each use requires configuration, the configuration frequency is too high, resulting in a waste of resources. To this end, the network device 1 presets a power offset table, which includes multiple different power offset parameters, and the power offset parameters include positive numbers, 0, and negative numbers. Among them, the power offset parameter is the power offset parameter of the PBCH relative to the PSS.

[0123] It can be understood that in actual use, the power bias parameter in the power bias table can also be the power bias parameter of PBCH relative to SSS, or the power bias parameter of DRMS ​​relative to PSS, or the power bias parameter of DRMS ​​relative to SSS, which is not specifically limited in the embodiments of the present application.

[0124] In addition, the power level of the power configuration table may be a resource element (RE) or a power count of consecutive REs of the same channel, which is not specifically limited in the embodiments of the present application.

[0125] For example, as shown in Table 2, it is a schematic table of power offset. Configuration 1 indicates that the power offset parameter of PBCH relative to PSS is 0. Configuration 2 indicates that the power offset parameter of PBCH relative to PSS is 3dB. Configuration 3 indicates that the power offset parameter of PBCH relative to PSS is -3dB, and so on.

[0126] Table 2

[0127] It should be noted that the above power configuration table is only for schematic illustration. In actual use, the configured data can be adjusted as needed, for example, configuration 1 is -1, configuration 2 is 0, configuration 3 is 1, etc. Arrange the configuration data from large to small (or small to large), and the adjacent data after configuration can have the same interval or different intervals, and the interval size can also be adjusted as needed.

[0128] In the embodiment of the present application, the network device 1 can obtain the power offset parameter of the PBCH relative to the PSS from the power configuration table based on the needs. For example, the network device 1 selects configuration 3 from the power configuration table, that is, the power offset parameter of the PBCH relative to the PSS is -3dB. If the power offset parameter of the PBCH relative to the PSS is -3dB, the transmit power P1 of the PBCH and the transmit power P2 of the PSS satisfy: P1=P2-3dBm.

[0129] The network device 1 can determine the transmit power P1 of the PBCH and the transmit power P2 of the PSS according to the power offset parameter of the PBCH relative to the PSS and the configured transmit power P of the SSB.

[0130] In one example, the transmit power of SSB can be configured as the maximum value of the configurable power range of ss-PBCH-BlockPower. The sum of the transmit power of PSS, the transmit power of SSS and the transmit power of PBCH is the transmit power of SSB. If network device 1 determines the maximum value of the configurable power range of ss-PBCH-BlockPower, the power offset parameter of PBCH relative to PSS, and the power offset parameter of PBCH relative to SSS, the transmit power of PBCH, the transmit power of PSS and the transmit power of SSS can be determined.

[0131] It should be noted that the transmission power of the SSB can be configured based on the power configuration range of the SSB after adjustment (i.e., the target range), or can be configured based on the power configuration range of the SSB before adjustment (i.e., the target range). The specific adjustment is made according to needs.

[0132] In an embodiment of the present application, network device 1 can optimize resource allocation by reducing the power bias of PBCH relative to PSS, and by increasing the transmission power of PSS and PBCH with different amplitudes, so that UE2 can simultaneously improve the success probability of detecting PSS and decoding PBCH.

[0133] Further, in the embodiment of the present application, the network device 1 obtains the target SNR (referred to as the first target SNR) of the PSS detected by UE2, and the target SNR (referred to as the second target SNR) of the decoded PBCH. The network device 1 determines the power offset value parameter of the PBCH relative to the PSS that is closest to the power offset value from the power offset table according to the power offset parameters of the first target SNR and the second target SNR.

[0134] For example, for scenario 3 in Table 1, the first target SNR for UE2 to detect PSS is -3.7dB, and the second target SNR for UE2 to decode PBCH is -7.3dB. The power offset value between the first target SNR and the second target SNR is 3.6dB. Network device 1 can select the power offset value parameter of the PBCH with the closest power offset relative to PSS from power offset table 2, which is -3dB.

[0135] Therefore, the network device 1 detects the PSS and the target SNR required for decoding the PBCH through the UE2, and the determined power offset value has a better resource configuration effect.

[0136] In specific applications, for example, in the TS38.214 protocol, a power offset table may be added, and the network device 1 obtains the power offset parameter from the power offset table when needed.

[0137] This method is simple to operate and has little impact on the communication system. It can be implemented by only making minor changes to the existing protocol and coverage enhancement (CE) scenario frame structure, which helps to maintain the stability of the communication system.

[0138] Embodiment 4 In the embodiment of the present application, the network device 1 can utilize the gap OFDM symbols between SSBs to retransmit the PBCH multiple times, thereby improving the SNR of the PBCH received by the UE2 without increasing the transmission power of the PBCH.

[0139] At present, the network device 1 may repeatedly transmit SSB multiple times in a preset time slot, and there are gap OFDM symbols between SSB and SSB. The following is a schematic explanation using SCS of 15KHz and a carrier frequency of 3GHz~6GHz as an example: Attached Figure 5 FIG. 1 is a schematic diagram of a structure for retransmitting multiple SSBs within a preset time slot. The preset time slot is a signal broadcast cycle, for example, 1 ms. Figure 5 As shown, within the preset time slot, the network device 1 retransmits the SSB multiple times. Figure 5 Take 2 times as an example for schematic illustration. There is a gap OFDM symbol between SSB and SSB. The gap OFDM symbol refers to an OFDM symbol not occupied by PBCH, SSS or PSS. Figure 5 It shows that there are two gaps between SSB and SSB OFDM symbols.

[0140] Attached Figure 6 This is another schematic diagram of a structure for retransmitting multiple SSBs within a preset time slot. Figure 6 As shown, the preset time slot is 5ms. Figure 6It shows that within the preset time slot, the network device retransmits SSB 6 times, namely SSB#1 to SSB#6. There is a gap OFDM symbol between SSB and SSB.

[0141] In an embodiment of the present application, the network device 1 can repeatedly transmit the PBCH based on the gap OFDM symbol, and improve the SNR of the PBCH received by the UE2 by combining the received signals of the PBCH received each time, so as to achieve the goal of using less PBCH transmission power to enable the UE2 to receive a higher PBCH SNR.

[0142] In one example, the network device 1 may repeatedly transmit the PBCH in the gap OFMD symbols adjacent to the SSB, thereby increasing the number of times the UE 2 receives the PBCH.

[0143] For example, if Fig. 7A FIG. 1 is a schematic diagram of a structure for retransmitting SSB in a preset time slot. Figure 5 , the network device 1 transmits the PBCH once repeatedly in the two gap OFDM symbols before the SSB. Thus, the PBCH transmission can be increased by two times in the preset time slot.

[0144] For example, if Figure 7B Another schematic diagram of the structure of retransmitting SSB in a preset time slot is shown. The network device 1 uses two gap OFDM symbols after SSB to repeatedly transmit PBCH.

[0145] For example, when a PBCH is transmitted once, the signal-to-noise ratio received by UE2 is 1dB. Figure 5 As shown, the signal-to-noise ratio received by UE2 is 8dB. Fig. 7A and Figure 7B As shown, the signal-to-noise ratio received by UE2 is 12 dB.

[0146] For example, if Figure 8 As shown, it is a structural diagram of another method of retransmitting SSB in a preset time slot provided by an embodiment of the present application. The network device 1 can retransmit PBCH once in the two nearest gap OFDM symbols before (or after) SSB.

[0147] In another example, before the network device 1 determines whether to retransmit the PBCH, it first calculates the difference between the SNR of the PBCH currently received by the UE2 and the target SNR, and determines the number of retransmissions based on the difference between the two.

[0148] For example, for scenario 3, if the SNR of the PBCH currently received by UE2 is -9.9dB and the target SNR is -7.3dB, the difference between the two is 2.6dB. If the SNR received by UE2 is 1dB each time the PBCH is transmitted, in order to achieve a gain of 2.6dB, the number of retransmissions N=10 （2.6 / 10） ≈1.82. N is an integer twice.

[0149] Embodiment 5 In an embodiment of the present application, network device 1 can use precoding technology to assign a precoding coefficient to each antenna port and adjust the beam direction of each antenna port, that is, configure the phase and amplitude of the transmitted signal of each antenna port; based on the phase and amplitude of the transmitted signal of each antenna port, send SSB to UE2.

[0150] Currently, the network device 1 often transmits the same SSB through multiple ports. In order to improve the SNR of the same SSB received by UE2, the precoding technology can be used to make the phase of each antenna port transmit in the direction of UE2, thereby improving the SNR of the SSB received by UE2.

[0151] The following is an analysis based on specific embodiments.

[0152] If the original SSB transmission power is P, the SSB is transmitted through n antenna ports. Where n>1, and n is an integer. The transmission power of each antenna port is P / n. Network device 1 presets a precoding coefficient for each antenna port. Where the precoding coefficient of antenna port 1 is , and so on, the precoding coefficient of antenna port n is .

[0153] In specific use, for example, in the TS38 protocol, the precoding coefficients may be configured to each antenna port through an RRC message or other control signaling.

[0154] Will Multiply it by the transmit port of antenna 1, and so on. Multiply at the transmit port of antenna n. The transmit signal S of each antenna port i It can be expressed as formula (2): (2) Where s is the original SSB data symbol. is the precoding coefficient The conjugate of i ≥1, and i is an integer.

[0155] If the precoding coefficient of each antenna port is used to make the phase of the antenna port face the direction of UE2. Therefore, the embodiment of the present application can make the beam direction of each antenna port be transmitted toward UE2 by changing the beam direction of antenna 1 to antenna n, thereby improving the concentration of the signal, thereby significantly improving the SNR of SSB received by UE2.

[0156] The following is combined with Fig. 9 For further explanation, see Fig. 9 Schematic diagram of a method for implementing the precoding technology provided in an embodiment of the present application. Fig. 9 As shown, take n=2 as an example. Fig. 9 (a) shows the SSB data to be transmitted continuously based on time. The Space-Frequency Block Code (SFBC) encoder obtains the SSB data to be transmitted, performs encoding based on the preset precoding coefficients, and generates two output signals. The first output signal is , the second output signal is a negative conjugate signal The two signals are sent to UE2 via two antenna ports. for The conjugate data.

[0157] Among them, the precoding coefficients form a precoding matrix, for example , for The negative conjugate of .

[0158] Fig. 9 (b) shows the subcarrier allocation of two antenna ports in the frequency domain.

[0159] The first output signal is mapped on antenna port 1 and sent through the subcarrier of antenna port 1, and the second output signal is mapped on antenna port 2 and sent through a subcarrier different from antenna port 1.

[0160] In addition, the embodiments of the present application may also be executed in other ways, which are not specifically limited by the embodiments of the present application.

[0161] Therefore, through the above method, the SNR of the target element received by UE2 can be adjusted.

[0162] Next, combine Fig.10 as well as Fig.11 , further introduces the hardware implementation of network equipment and UE.

[0163] See also Fig.10 , showing a schematic diagram of the hardware structure of a network device, which can be used to execute the method executed by the network device. Fig.10 The network device shown includes at least one processor 111, at least one memory 112, at least one transceiver 113, at least one network interface 114 and one or more antennas 115. The processor 111, the memory 112, the transceiver 113 and the network interface 114 are connected, for example, through a bus. In an embodiment of the present application, the connection may include various interfaces, transmission lines or buses, etc., which are not limited in this embodiment. The antenna 115 is connected to the transceiver 113. The network interface 114 is used to connect the network device to other communication devices through a communication link. For example, the network interface 114 may include a network interface between a network device and a network device in a core network, such as an S1 interface. The network interface may include a network interface between a network device and other network devices, such as an X2 or Xn interface.

[0164] in, Fig.10 The processor 111 shown in the figure can specifically complete the actions of network device processing in the above method, the memory 112 can complete the actions of storage in the above method, the transceiver 113 and the antenna 115 can perform the sending and receiving actions on the air interface in the above method, and the network interface 114 can complete the actions of interacting with the network device or other network devices / network elements in the above method.

[0165] The processor in the embodiment of the present application, such as the processor 111, may include but is not limited to at least one of the following: a central processing unit (CPU), a microprocessor, a digital signal processor (DSP), a microcontroller unit (MCU), or an artificial intelligence processor and other types of computing devices that run software, each of which may include one or more cores for executing software instructions to perform operations or processing. The processor may be a separate semiconductor chip, or it may be integrated into a semiconductor chip together with other circuits. For example, it may form a SoC (system on chip) with other circuits (such as a codec circuit, a hardware acceleration circuit, or various buses and interface circuits), or it may be integrated into the ASIC as a built-in processor of an ASIC. The ASIC with the integrated processor may be packaged separately or with other circuits. In addition to the core for executing software instructions for operations or processing, the processor may further include necessary hardware accelerators, such as FPGA (field programmable gate array), PLD (programmable logic device), or logic circuits for implementing dedicated logic operations.

[0166] The memory in the embodiments of the present application may include at least one of the following types: read-only memory (ROM) or other types of static storage devices that can store static information and instructions, random access memory (RAM) or other types of dynamic storage devices that can store information and instructions, and may also be electrically erasable programmable read-only memory (EEPROM). In some scenarios, the memory may also be a compact disc read-only memory (CD-ROM) or other optical disc storage, optical disc storage (including compressed optical disc, laser disc, optical disc, digital versatile disc, Blu-ray disc, etc.), magnetic disk storage medium or other magnetic storage device, or any other medium that can be used to carry or store the desired program code in the form of instructions or data structures and can be accessed by a computer, but is not limited thereto.

[0167] The memory 112 may be independent and connected to the processor 111. Optionally, the memory 112 may be integrated with the processor 111, for example, integrated into a chip. The memory 112 can store program codes for executing the technical solutions of the embodiments of the present application, and the execution is controlled by the processor 111. The various types of computer program codes executed may also be regarded as drivers of the processor 111. For example, the processor 111 is used to execute the computer program codes stored in the memory 112, thereby realizing the technical solutions in the embodiments of the present application.

[0168] The transceiver 113 can be used to support the reception or transmission of radio frequency signals between the network device and other devices, and the transceiver 113 can be connected to the antenna 115. The transceiver 113 includes a transmitter Tx and a receiver Rx. Specifically, one or more antennas 115 can receive radio frequency signals, and the receiver Rx of the transceiver 113 is used to receive the radio frequency signal from the antenna, convert the radio frequency signal into a digital baseband signal or a digital intermediate frequency signal, and provide the digital baseband signal or the digital intermediate frequency signal to the processor 111, so that the processor 111 further processes the digital baseband signal or the digital intermediate frequency signal, such as demodulation processing and decoding processing. In addition, the transmitter Tx in the transceiver 113 is also used to receive a modulated digital baseband signal or a digital intermediate frequency signal from the processor 111, and convert the modulated digital baseband signal or the digital intermediate frequency signal into a radio frequency signal, and send the radio frequency signal through one or more antennas 115. Specifically, the receiver Rx can selectively perform one or more stages of down-mixing and analog-to-digital conversion processing on the RF signal to obtain a digital baseband signal or a digital intermediate frequency signal, and the order of the down-mixing and analog-to-digital conversion processing is adjustable. The transmitter Tx can selectively perform one or more stages of up-mixing and digital-to-analog conversion processing on the modulated digital baseband signal or digital intermediate frequency signal to obtain a RF signal, and the order of the up-mixing and digital-to-analog conversion processing is adjustable. The digital baseband signal and the digital intermediate frequency signal can be collectively referred to as a digital signal.

[0169] Fig.11 The composition example of the UE provided in the embodiment of the present application, the UE may be, for example, a mobile phone, a smart wearable device (such as a smart watch), etc. Taking a mobile phone as an example, the UE may include a processor 310, an external memory interface 320, an internal memory 321, an antenna 1, an antenna 2, a mobile communication module 350, and a wireless communication module 360, etc.

[0170] It is to be understood that the structure illustrated in this embodiment does not constitute a specific limitation on the UE. In other embodiments, the UE may include more or fewer components than shown in the figure, or combine certain components, or split certain components, or arrange the components differently. The components shown in the figure may be implemented in hardware, software, or a combination of software and hardware.

[0171] The processor 310 may include one or more processing units, for example, the processor 310 may include an application processor (AP), a modem processor, a graphics processor (GPU), an image signal processor (ISP), a controller, a time-frequency codec, a digital signal processor (DSP), a baseband processor, and / or a neural-network processing unit (NPU), etc. Different processing units may be independent devices or integrated into one or more processors.

[0172] It is understandable that the interface connection relationship between the modules illustrated in this embodiment is only a schematic illustration and does not constitute a structural limitation on the UE. In other embodiments of the present application, the UE may also adopt different interface connection methods in the above embodiments, or a combination of multiple interface connection methods.

[0173] The external memory interface 320 can be used to connect an external memory card, such as a Micro SD card, to expand the storage capacity of the UE. The external memory card communicates with the processor 310 through the external memory interface 320 to implement a data storage function. For example, music, time and frequency files are stored in the external memory card.

[0174] The internal memory 321 can be used to store computer executable program codes, and the executable program codes include instructions. The processor 310 executes various functional applications and data processing of the UE by running the instructions stored in the internal memory 321. The internal memory 321 may include a program storage area and a data storage area. Among them, the program storage area may store an operating system, an application required for at least one function (such as a sound playback function, an image playback function, etc.), etc. The data storage area may store data created during the use of the UE (such as time-frequency stream data), etc. In addition, the internal memory 321 may include a high-speed random access memory, and may also include a non-volatile memory, such as at least one disk storage device, a flash memory device, a universal flash storage (UFS), etc. The processor 310 executes various functions and data processing of the UE by running instructions stored in the internal memory 321, and / or instructions stored in a memory provided in the processor.

[0175] The wireless communication function of the UE can be implemented through antenna 1, antenna 2, mobile communication module 350, wireless communication module 360, modem processor and baseband processor.

[0176] Antenna 1 and antenna 2 are used to transmit and receive electromagnetic wave signals. Each antenna in the UE can be used to cover a single or multiple communication frequency bands. Different antennas can also be reused to improve the utilization of the antennas. For example, antenna 1 can be reused as a diversity antenna for a wireless local area network. In some other embodiments, the antenna can be used in combination with a tuning switch.

[0177] The mobile communication module 350 can provide solutions for wireless communications including 2G / 3G / 4G / 5G applied on UE. The mobile communication module 350 may include at least one filter, a switch, a power amplifier, a low noise amplifier (LNA), etc. The mobile communication module 350 can receive electromagnetic waves from the antenna 1, and filter, amplify, and process the received electromagnetic waves, and transmit them to the modulation and demodulation processor for demodulation. The mobile communication module 350 can also amplify the signal modulated by the modulation and demodulation processor, and convert it into electromagnetic waves for radiation through the antenna 1. In some embodiments, at least some of the functional modules of the mobile communication module 350 can be set in the processor 310. In some embodiments, at least some of the functional modules of the mobile communication module 350 can be set in the same device as at least some of the modules of the processor 310.

[0178] In some embodiments, the UE sends the request via the mobile communication module 350 and the antenna 1 .

[0179] In addition, an operating system is running on the above components. For example, an iOS operating system, an Android operating system, a Windows operating system, etc. Applications can be installed and run on the operating system. Those skilled in the art can clearly understand that for the convenience and simplicity of description, the explanation and beneficial effects of the relevant contents in any of the UEs provided above can refer to the corresponding method embodiments provided above, and will not be repeated here.

[0180] Fig.12 is a schematic block diagram of a communication device provided in an embodiment of the present application. Fig.12 As shown, the communication device 1200 may include a communication device 1220. The communication device 1220 may implement a corresponding communication function, which may be an internal communication function of the communication device 1200 or a communication function between the communication device 1200 and other devices. Optionally, the communication module 1220 may also be referred to as a communication interface or a transceiver module.

[0181] Optionally, the communication device 1200 further includes a processing module 1210. The processing module 1210 can implement corresponding processing functions.

[0182] Optionally, the communication device 1200 further includes a storage module, which can be used to store instructions and / or data; the processing module 1210 can read the instructions and / or data in the storage module so that the communication device 1200 implements the aforementioned method embodiment.

[0183] In a possible design, the communication device 1200 may correspond to the UE in the above method embodiment, or a component (such as a circuit, a chip or a chip system, etc.) configured in the UE. The communication device 1200 may be used to execute the steps or processes executed by the terminal device in any of the above method embodiments.

[0184] Exemplarily, the processing module 1210 is used to configure a transmission parameter for sending a target element in an SSB; wherein the transmission parameter is used to make a signal-to-noise ratio of the target element received by the user equipment greater than or equal to a target signal-to-noise ratio, and the target signal-to-noise ratio is a signal-to-noise ratio required for the user equipment to demodulate or detect the target element in the SSB; The communication module 1220 is used to send the SSB and / or send the target element to the user equipment according to the transmission parameters.

[0185] The above are only examples, and for detailed steps or processes, please refer to the description of the aforementioned embodiments.

[0186] In a possible design, the communication device 1200 may correspond to the network device in the above method embodiment, or a component (such as a circuit, a chip or a chip system, etc.) configured in the network device. The communication device 1200 may be used to execute the steps or processes executed by the network device in any of the above method embodiments.

[0187] For example, the processing module 1210 is used to determine the SNR of the target element and decode or detect the target element according to the SNR of the target element.

[0188] The above are only examples, and for detailed steps or processes, please refer to the description of the aforementioned embodiments.

[0189] In addition, an embodiment of the present application also provides a computer-readable storage medium, which stores instructions. When the computer-readable storage medium is executed on one or more computing devices, the one or more computing devices execute the communication method described in the above embodiment.

[0190] In addition, the embodiment of the present application further provides a computer program product, and when the computer program product is executed by one or more computing devices, the one or more computing devices execute any of the aforementioned communication methods. The computer program product may be a software installation package, and when any of the aforementioned communication methods is required, the computer program product may be downloaded and executed on a computer.

[0191] Through the description of the above implementation methods, the technicians in the relevant field can clearly understand that the present application can be implemented by means of software plus necessary general hardware, and of course, it can also be implemented by special hardware including special integrated circuits, special CPUs, special memories, special components, etc. In general, all functions completed by computer programs can be easily implemented by corresponding hardware, and the specific hardware structures used to implement the same function can also be various, such as analog circuits, digital circuits or special circuits. However, for the present application, software program implementation is a better implementation method in more cases. Based on such an understanding, the technical solution of the present application is essentially or the part that contributes to the prior art can be embodied in the form of a software product, which is stored in a readable storage medium, such as a computer floppy disk, U disk, mobile hard disk, ROM, RAM, disk or optical disk, etc., including a number of instructions to enable a computer device (which can be a personal computer, training equipment, or network equipment, etc.) to execute the methods described in each embodiment of the present application.

[0192] In the above embodiments, all or part of the embodiments may be implemented by software, hardware, firmware or any combination thereof. When implemented by software, all or part of the embodiments may be implemented in the form of a computer program product.

[0193] The computer program product includes one or more computer instructions. When the computer program instructions are loaded and executed on a computer, the process or function described in the embodiment of the present application is generated in whole or in part. The computer may be a general-purpose computer, a special-purpose computer, a computer network, or other programmable device. The computer instructions may be stored in a computer-readable storage medium, or transmitted from one computer-readable storage medium to another computer-readable storage medium. For example, the computer instructions may be transmitted from a website, computer, training equipment, or data center to another website, computer, training equipment, or data center by wired (e.g., coaxial cable, optical fiber, digital subscriber line (DSL)) or wireless (e.g., infrared, wireless, microwave, etc.) means. The computer-readable storage medium may be any available medium that a computer can store or a data storage device such as a training device, data center, etc. that includes one or more available media integrated. The available medium may be a magnetic medium (e.g., a floppy disk, a hard disk, a tape), an optical medium (e.g., a DVD), or a semiconductor medium (e.g., a solid-state drive (SSD)).

Claims

1. A communication method, characterized in that: A satellite network device applied to a non-terrestrial network, the method comprising: Configure the transmission parameters of the target element in the synchronization signal block SSB; The transmission parameter is used to make the signal-to-noise ratio of the target element received by the user equipment greater than or equal to the target signal-to-noise ratio, where the target signal-to-noise ratio is the minimum signal-to-noise ratio for the user equipment to demodulate or detect the target element in the SSB; According to the transmission parameters, the SSB and / or the target element are sent to the user equipment.

2. The method according to claim 1, characterized in that The target element includes one or more of the following: Primary synchronization signal PSS and physical broadcast channel PBCH.

3. The method according to claim 1, characterized in that The transmission parameters include one or more of the following: The transmit power, number of repetitions and beam direction of each antenna port in the satellite network device.

4. The method according to claim 3, characterized in that If the transmission parameter is the transmission power of the target element, the configuring the transmission parameter of the target element in the synchronization signal block SSB includes: Adjusting the configurable range of the SSB transmission power to a target range; Based on the target range, a transmit power of the target element is configured.

5. The method according to claim 4, characterized in that The maximum value of the target range is greater than the maximum value of the power configurable range of the SSB before adjustment.

6. The method according to claim 5, characterized in that The configurable range for adjusting the transmit power of the SSB is a target range, including: If the target signal-to-noise ratio is greater than the reference signal-to-noise ratio, the configurable range of the transmission power of the SSB is adjusted to the target range, and the reference signal-to-noise ratio indicates the signal-to-noise ratio received by the user equipment when the SSB is sent with the maximum value of the configurable power range of the SSB before adjustment.

7. The method according to claim 3, characterized in that The configurable range for adjusting the transmit power of the SSB is the target range, including: The power configuration range of ss-PBCH-BlockPower is adjusted to the target range.

8. The method according to any one of claims 3 to 7, characterized in that: The configuration of sending the transmission parameters of the target element in the synchronization signal block SSB includes: Obtaining a power offset parameter of the PBCH or demodulation reference signal DRMS ​​in the SSB relative to the PSS or the secondary synchronization signal block SSS; Based on a power offset parameter of the PBCH or the DRMS ​​relative to the PSS or the SSS, a transmit power for sending the target element is determined.

9. The method according to claim 8, characterized in that: The obtaining of a power offset parameter of a PBCH or a demodulation reference signal DRMS ​​in the SSB relative to a PSS or a secondary synchronization signal block SSS includes: Determining, according to the target signal-to-noise ratio, a target power offset parameter of the PBCH or the DRMS ​​relative to the PSS or the SSS; According to the target power offset parameter, a preset power offset parameter corresponding to the target power offset parameter is screened out from a preconfigured power offset table; the power offset table includes a plurality of preset power offset parameters.

10. The method according to any one of claims 3 to 7, characterized in that: The target element is PBCH, and if the transmission parameter is the number of repeated transmissions, the configuration of sending the transmission parameter of the target element in the synchronization signal block SSB includes: Configure the number of repeated transmissions of the PBCH in a preset time slot; Sending the target element to the user equipment according to the transmission parameter includes: Based on the number of repeated transmissions, the PBCH is repeatedly transmitted to the user equipment using a gap symbol, the time slot includes a plurality of orthogonal frequency division multiplexing OFDM symbols, and the gap symbol is a symbol not occupied by the SSB in the preset time slot.

11. The method according to claim 10, characterized in that The method further comprises: The PBCH is repeatedly transmitted using the empty OFDM symbols in the time slot where the PSS in the SSB is located.

12. The method according to any one of claims 3 to 7, characterized in that: The SSB is transmitted at n antenna ports, where n is an integer greater than 1, the transmission parameter is a beam direction of each antenna port, and the configuration of transmitting the transmission parameter of the target element in the synchronization signal block SSB includes: Determining a precoding coefficient for each antenna port; Based on the precoding coefficient and the transmit power of each antenna port, configure the phase and amplitude of the transmit signal of each antenna port; The sending the SSB to the user equipment according to the transmission parameter includes: The SSB is sent to the user equipment based on the phase and amplitude of the transmit signal of each antenna port.

13. A communication method, characterized in that: Applied to user equipment, the method comprises: Receiving an SSB of a satellite network device of a non-terrestrial network and / or a target element in the SSB; determining a signal-to-noise ratio of the target element; If the signal-to-noise ratio of the target element is greater than or equal to the target signal-to-noise ratio, the target element is decoded or detected; the target signal-to-noise ratio is the minimum signal-to-noise ratio for the user equipment to demodulate or detect the target element in the SSB.

14. The method according to claim 13, characterized in that The method further comprises: If the signal-to-noise ratio of the target element is less than the target signal-to-noise ratio, a response message is fed back to the satellite network device, where the response message is used to indicate that the signal-to-noise ratio of the target element is less than the target signal-to-noise ratio.

15. The method according to claim 13, characterized in that The target element includes one or more of the following: PSS and PBCH.

16. The method according to claim 13, characterized in that The determining the signal-to-noise ratio of the target element comprises: If the target element is received p times within the preset time slot, p is greater than or equal to 1; The received signals of the target element each time are combined, and the combined signal-to-noise ratio is used as the signal-to-noise ratio of the target element.

17. The method according to claim 13, characterized in that The determining the signal-to-noise ratio of the target element comprises: Acquire a received signal of a target element sent by n antenna ports; the n antenna ports are n antenna ports of the satellite network device, the n is greater than or equal to 1, and the n is an integer; The received signals of the target elements of the n antenna ports are combined to obtain a signal-to-noise ratio of the target element.

18. A communication device, characterized in that: Satellite network equipment applied to non-terrestrial networks, the communication device comprising a communication device and a processing device; The processing device is used to configure the transmission parameters of the target element in the synchronization signal block SSB; The transmission parameter is used to make the signal-to-noise ratio of the target element received by the user equipment greater than or equal to the target signal-to-noise ratio, where the target signal-to-noise ratio is the minimum signal-to-noise ratio for the user equipment to demodulate or detect the target element in the SSB; The communication device is used to send the SSB and / or the target element to the user equipment according to the transmission parameters.

19. A communication device, characterized in that: Applied to user equipment, the communication device comprises a communication module and a processing module; The communication module is used to receive the SSB of the satellite network device of the non-terrestrial network and / or the target element in the SSB; The processing module is used to determine the signal-to-noise ratio of the target element; if the signal-to-noise ratio of the target element is greater than or equal to the target signal-to-noise ratio, decode or detect the target element; the target signal-to-noise ratio is the signal-to-noise ratio required for the user equipment to demodulate or detect the target element in the SSB.

20. A communication system, characterized in that: Including satellite network equipment and user equipment; The satellite network device executes the communication method as described in any one of claims 1-12, and the user equipment executes the communication method as described in any one of claims 13-17.

21. A computer storage medium, characterized in that Used to store a computer program, which, when executed, is used to implement the communication method according to any one of claims 1 to 17.

22. A computer program product comprising instructions, characterized in that When it is executed on at least one computing device, the at least one computing device is enabled to implement the communication method according to any one of claims 1 to 17.

Images