CN118232977A - Communication method and satellite terminal - Google Patents
Communication method and satellite terminal Download PDFInfo
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- CN118232977A CN118232977A CN202410263260.1A CN202410263260A CN118232977A CN 118232977 A CN118232977 A CN 118232977A CN 202410263260 A CN202410263260 A CN 202410263260A CN 118232977 A CN118232977 A CN 118232977A
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Abstract
The embodiment of the application provides a communication method and a satellite terminal, which relate to the technical field of communication and are applied to the satellite terminal, wherein a first antenna and a second antenna are configured on the satellite terminal, and the method comprises the following steps: communicating with a satellite through the first antenna; and when the second antenna meets the working condition, switching to communicate with the satellite through the second antenna. By applying the technical scheme provided by the embodiment of the application, the stability of the communication performance of the satellite terminal is improved, and the user experience is improved.
Description
Technical Field
The present application relates to the field of communications technologies, and in particular, to a communications method and a satellite terminal.
Background
The satellite terminal adopts a single antenna receiving and transmitting mode to receive and transmit signals. In the single antenna receiving and transmitting mode, a single antenna is configured on the satellite terminal, and due to the habit of using the satellite terminal by a user, the antenna configured on the satellite terminal can be shielded, so that the receiving and transmitting performance of the antenna is affected, further, the stability of the communication performance of the satellite terminal is poor, and the user experience is poor.
Disclosure of Invention
The embodiment of the application aims to provide a communication method and a satellite terminal, so as to improve the stability of the communication performance of the satellite terminal and improve the user experience. The specific technical scheme is as follows:
In a first aspect, an embodiment of the present application provides a communication method, which is applied to a satellite terminal, where the satellite terminal is configured with a first antenna and a second antenna, and the method includes:
communicating with a satellite through the first antenna;
And when the second antenna meets the working condition, switching to communicate with the satellite through the second antenna.
In some embodiments, the method further comprises:
and triggering the evaluation of whether the second antenna meets the working condition according to a preset evaluation period or a preset event in the process of communicating with the satellite through the first antenna.
In some embodiments, the evaluation period is determined based on an operational state of the satellite terminal.
In some embodiments, the operating state of the satellite terminal corresponds to a reference period, and the evaluation period is an integer multiple of the reference period.
In some embodiments, when the working state of the satellite terminal is an idle state, the reference period is a paging period;
When the working state of the satellite terminal is a discontinuous receiving state in a connection state, the reference period is a discontinuous receiving period;
and when the working state of the satellite terminal is a continuous receiving state in a connection state, the reference period is a first preset duration.
In some embodiments, the preset event is that the first antenna communicates with the satellite for a second preset duration, or the working state changes.
In some embodiments, after the preset event is acquired, an evaluation of whether the second antenna meets the working condition is triggered according to a preset evaluation period.
In some embodiments, the method further comprises:
And in the process of communicating with the satellite through the first antenna, according to the channel quality parameter of the first antenna, enabling the evaluation of whether the second antenna meets the working condition.
In some embodiments, the evaluation of whether the second antenna satisfies the operating condition is enabled when the channel quality parameter of the first antenna indicates that the channel condition of the first antenna is poor.
In some embodiments, the channel quality parameter of the first antenna indicates that the channel condition of the first antenna is poor, comprising:
The downlink signal-to-noise ratio SINR is lower than a first preset threshold value and the reference signal received power RSRP is lower than a second preset threshold value; and/or
The block error rate BLER received downstream is higher than a third preset threshold.
In some embodiments, the method further comprises:
During the process of communicating with a satellite through the first antenna, measuring an antenna evaluation parameter corresponding to the working state of the satellite terminal;
And according to the antenna evaluation parameters, evaluating whether the second antenna meets the working conditions.
In some embodiments, the working state of the satellite terminal is a discontinuous reception state in an idle state or a connection state, and the corresponding antenna evaluation parameter is a downlink received signal power parameter of each antenna.
In some embodiments, the downlink received signal power parameter includes SINR, RSRP;
the second antenna meeting the operating condition includes: the difference value between the SINR of the first antenna and the SINR of the second antenna is larger than a first preset threshold value, and the difference value between the RSRP of the first antenna and the RSRP of the second antenna is larger than a second preset threshold value.
In some embodiments, the downlink received signal power parameter for each antenna is obtained by measurement during communication between the antenna and the satellite;
The time for switching the measured antenna is the idle time slot after the measurement of the downlink received signal power parameter of the antenna is completed.
In some embodiments, the working state of the satellite terminal is a continuous receiving state in a connection state, and the corresponding antenna evaluation parameter is an uplink transmission signal power parameter of the first antenna.
In some embodiments, the uplink transmission signal power parameter includes an average value of uplink transmission power headroom and an uplink transmission BLER;
the second antenna meeting the operating condition includes: and the average value of the uplink transmission power margin of the first antenna is lower than a third preset threshold value, and the BLER of the uplink transmission of the first antenna is higher than a fourth preset threshold value.
In some embodiments, the number of second antennas is a plurality;
the second antenna in communication with the satellite is: and according to a preset antenna sequence, the next antenna corresponding to the first antenna is arranged.
In some embodiments, when the second antenna satisfies an operating condition, the method further comprises:
determining switching time according to the working state of the satellite terminal;
And when the switching time is reached, executing the step of switching to communicate with a satellite through the second antenna.
In some embodiments, when the working state of the satellite terminal is an idle state or a discontinuous reception state in a connection state, the switching time is the time of the satellite terminal for receiving data next time;
And when the working state of the satellite terminal is a continuous receiving state in a connection state, the switching time is an idle time slot.
In a second aspect, an embodiment of the present application provides a satellite terminal, where the satellite terminal is configured with a first antenna and a second antenna, and the satellite terminal includes an antenna switch, an antenna evaluation module, and an antenna switching module;
the antenna change-over switch is used for selecting to communicate with a satellite through the first antenna;
the antenna evaluation module is used for evaluating whether the second antenna meets the working condition or not and notifying the evaluation result to the antenna switching module;
the antenna switching module is used for receiving the evaluation result notified by the antenna evaluation module, and controlling the antenna switching switch to communicate with a satellite through the second antenna when the received evaluation result indicates that the second antenna meets the working condition.
In some embodiments, the antenna evaluation module is further to:
and triggering the evaluation of whether the second antenna meets the working condition according to a preset evaluation period or a preset event in the process of communicating with the satellite through the first antenna.
In some embodiments, the antenna evaluation module is further to:
After a preset event is acquired, triggering the evaluation of whether the second antenna meets the working condition according to a preset evaluation period.
In some embodiments, the antenna evaluation module is further to:
And in the process of communicating with the satellite through the first antenna, according to the channel quality parameter of the first antenna, enabling the evaluation of whether the second antenna meets the working condition.
In some embodiments, the antenna evaluation module is further to:
and when the channel quality parameter of the first antenna indicates that the channel condition of the first antenna is poor, enabling the evaluation of whether the second antenna meets the working condition.
In some embodiments, the antenna evaluation module is further to:
During the process of communicating with a satellite through the first antenna, measuring an antenna evaluation parameter corresponding to the working state of the satellite terminal;
And according to the antenna evaluation parameters, evaluating whether the second antenna meets the working conditions.
In some embodiments, the antenna switching module is further to:
When the second antenna meets working conditions, determining switching time according to the working state of the satellite terminal;
And when the switching time is reached, executing the step of switching to communicate with a satellite through the second antenna.
The embodiment of the application has the beneficial effects that:
In the technical scheme provided by the embodiment of the application, a plurality of antennas, such as the first antenna and the second antenna, are configured on the satellite terminal, the satellite terminal communicates with the satellite through the first antenna, and when the second antenna meets the working condition, the communication performance of the second antenna is better, and the second antenna is switched to communicate with the satellite through the second antenna. The satellite terminal automatically switches the working antenna through the evaluation of the working condition of the antenna, namely, switches the antenna which is in communication with the satellite, ensures the adoption of the antenna with better communication performance for communication with the satellite, improves the stability of the communication performance of the satellite terminal, and improves the user experience.
Of course, it is not necessary for any one product or method of practicing the application to achieve all of the advantages set forth above at the same time.
Drawings
In order to more clearly illustrate the embodiments of the application or the technical solutions in the prior art, the drawings used in the embodiments or the description of the prior art will be briefly described below, and it is obvious that the drawings in the following description are only some embodiments of the application, and other embodiments may be obtained according to these drawings to those skilled in the art.
FIG. 1 is a schematic diagram of a satellite terminal in the prior art in communication with a satellite;
fig. 2a is a schematic diagram of a first structure of a satellite terminal according to an embodiment of the present application;
fig. 2b is a schematic diagram of a second structure of a satellite terminal according to an embodiment of the present application;
FIG. 2c is a schematic diagram of an example of a satellite terminal in communication with a satellite according to an embodiment of the present application;
fig. 3 is a schematic diagram of an evaluation flow of an antenna evaluation module according to an embodiment of the present application;
fig. 4 is a schematic diagram of acquiring a downlink received signal power parameter according to an embodiment of the present application;
fig. 5 is a schematic diagram of a switching flow of an antenna switching module according to an embodiment of the present application;
Fig. 6 is a schematic flow chart of a communication method according to an embodiment of the present application.
Detailed Description
The following description of the embodiments of the present application will be made clearly and completely with reference to the accompanying drawings, in which it is apparent that the embodiments described are only some embodiments of the present application, but not all embodiments. Based on the embodiments of the present application, all other embodiments obtained by the person skilled in the art based on the present application are included in the scope of protection of the present application.
Satellite terminals, i.e. terminals on the ground that can communicate with satellites. The existing satellite terminal adopts a single-receiving single-transmitting mode, namely, a single antenna is configured on the satellite terminal, and the single antenna is adopted to transmit and receive signals. As shown in fig. 1, the satellite terminal adopts an external top antenna, the top antenna of the satellite terminal receives downlink signals sent by a satellite, the downlink signals are amplified by a duplexer through a low-noise amplification module and transmitted to a radio frequency receiving module to be subjected to frequency conversion and downsampling to be baseband signals, and the baseband signals are processed by a baseband processing module to finish downlink reception. Similarly, the uplink signal is processed by the baseband processing module, the radio frequency transmitting module, the power amplification module and the duplexer and then is sent to the satellite through the top antenna of the satellite terminal.
When the satellite terminal adopts the single antenna as the external top antenna, a user is usually prompted to align the external top antenna of the satellite terminal to the satellite direction as much as possible, so that the receiving and transmitting performances of the antenna are ensured.
With the popularization of satellite network communication, satellite terminals directly connected with satellites become a mainstream development form of satellite network communication. The antenna design of the mainstream satellite terminal mostly adopts an open metal middle frame antenna and a built-in antenna, and the habit of using the satellite terminal by users can influence the receiving and transmitting performance of the antenna. For example: the satellite terminal is a mobile phone, and when the mobile phone is used as a transverse screen, the hand of a user can shield the top antenna; when a user uses the mobile phone to talk, the mobile phone is close to the ear, and the top antenna may be covered by the ear. The antenna is blocked, which causes a large signal attenuation, resulting in a degradation of communication quality and even interruption of communication. With the abundance of satellite network communication applications and the popularity of satellite terminals, users are required to change the habit of using mobile phones to ensure that satellite communication performance will no longer be applicable.
In order to solve the above problems and improve the stability of the communication performance of the satellite terminal and enhance the user experience, an embodiment of the present application provides a satellite terminal, as shown in fig. 2a, which includes an antenna switch 21, an antenna evaluation module 22 and an antenna switch module 23;
an antenna changeover switch 21 for selecting communication with the satellite through the first antenna;
an antenna evaluation module 22 for evaluating whether the second antenna satisfies the operation condition and notifying the antenna switching module of the evaluation result;
and the antenna switching module 23 is configured to receive the evaluation result notified by the antenna evaluation module 22, and control the antenna switching switch to communicate with the satellite through the second antenna when the received evaluation result indicates that the second antenna meets the working condition.
In the embodiment of the present application, an antenna switch 21, an antenna evaluation module 22 and an antenna switch module 23 are disposed in the satellite terminal, the antenna evaluation module 22 evaluates whether the second antenna meets the working condition, and notifies the evaluation result to the antenna switch module 23, and after receiving the evaluation result notified by the antenna evaluation module 22, the antenna switch module 23 controls the antenna switch 21 to switch to communicate with the satellite through the second antenna when the received evaluation result indicates that the second antenna meets the working condition. The satellite terminal adjusts the working antenna to be the second antenna in time when the receiving and transmitting performance of the second antenna is good through evaluating the receiving and transmitting performance of the antenna, so that the stability of the communication performance of the satellite terminal is improved, and the user experience is improved.
In the embodiment of the present application, the satellite terminal may be divided into an antenna system, an antenna switch, a radio frequency transceiver system and a baseband processing system, as shown in fig. 2 b.
In the satellite terminal shown in fig. 2b, the antenna system may include a plurality of antennas, such as a first antenna and a second antenna; the first antenna is an antenna for the current satellite terminal to communicate with a satellite, namely a working antenna; the number of second antennas may be one or more. The antenna system of the satellite terminal may be configured with 2 antennas, 4 antennas or any other number of antennas, and the corresponding antenna switch 21 may be a DPDT (Double Pole Double Throw ) switch, a 4P4T (4 pole 4 through, 4pole 4 throw) switch or any other type of switch. The antenna switch 21 may select any antenna of the antenna system to be connected to the rf transceiver system of the satellite terminal, i.e. to communicate with the satellite through the antenna. For example, a dual antenna satellite terminal as shown in fig. 2c includes a top antenna and a side antenna, wherein the antenna switch is a DPDT switch that can selectively communicate with the satellite through either the top antenna or the side antenna.
The radio frequency receiving and transmitting system can comprise a duplexer, a power amplification module, a low-noise amplification module, a radio frequency receiving module and a radio frequency transmitting module, and is used for transmitting signals between the antenna system and the baseband processing system and carrying out frequency conversion, sampling and power amplification processing on the transmitted signals. The duplexer receives a receiving signal transmitted by the antenna and transmits the receiving signal to the low-noise amplifier module; the low noise amplifier module is used for amplifying the received signal and transmitting the amplified signal to the radio frequency receiving module; the radio frequency receiving module is used for carrying out frequency conversion and downsampling on the received signals to obtain baseband signals and transmitting the baseband signals to the baseband processing system; the radio frequency transmitting module carries out frequency conversion and sampling on the transmitted signals and transmits the converted signals to the power amplifier module; the power amplification module amplifies the power of the transmission signal and transmits the power to the duplexer, and then the power is transmitted to the antenna through the duplexer, and the antenna transmits the transmission signal to the satellite; the duplexer can isolate the transmitting signal and the receiving signal to avoid mutual interference.
The baseband processing system may include a baseband processing module, an antenna evaluation module 22, and an antenna switching module 23. The baseband processing module performs baseband processing on signals to be received and transmitted, and completes the reception of downlink signals and the initialization of uplink signals.
The antenna evaluation module 22 performs an evaluation process of evaluating whether the second antenna satisfies the operation condition, and notifies the antenna switching module 23 of the evaluation result.
The evaluation process of the antenna evaluation module 22 may be triggered periodically or in an event, and the evaluation result is notified to the antenna switching module 23 after the evaluation. The periodic triggering depends on a preset evaluation period, each evaluation period executes an evaluation flow, and when the current working antenna is not good in receiving and transmitting performance, the working antenna can be timely adjusted to be a second antenna with good receiving and transmitting performance; the event triggering is to trigger an evaluation flow when a preset event occurs, and the working antenna can be timely adjusted to be a second antenna with better transceiving performance according to the occurred event when the preset event occurs; the preset event comprises that the satellite terminal enters different working states, the satellite terminal communicates with the satellite through the first antenna for a second preset duration, and the like. When the satellite terminal communicates with the satellite through the first antenna for a second preset period of time, the antenna switching module 23 may notify the antenna evaluation module 22, thereby triggering the evaluation procedure. In the embodiment of the present application, the first antenna is an antenna currently communicating with a satellite in an antenna system of a satellite terminal, and if the antenna switch 21 is switched to communicate with the satellite through the second antenna, the switched second antenna is used as the first antenna. In the embodiment of the application, different working states of the satellite terminal comprise an IDLE state, a CONNECTED DRX (discontinuous reception state under a CONNECTED state), a CONNECTED Non-DRX (continuous reception state under the CONNECTED state) and the like.
The functional flow of the antenna evaluation module 22 shown in fig. 3 may include the following steps, wherein step S32-step S36 are evaluation flows.
In step S31, the antenna evaluation module determines an evaluation period.
In the embodiment of the present application, the antenna evaluation module 22 may determine an antenna evaluation period according to the working state of the satellite terminal, so as to adapt to different working states of the satellite terminal to evaluate the working condition of the antenna. Before determining the evaluation period, the reference period T basic of the satellite terminal in different working states may be determined as follows.
(1) IDLE: the reference period T basic = PAGING CYCLE with PAGING CYCLE (paging period) as the reference period. When the satellite terminal is in the IDLE state, the satellite will send a downlink signal to the satellite terminal every PAGING CYCLE to inform the satellite terminal of the change of the network state information of the cell, etc.
(2) CONNECTED DRX: the reference period T basic =drx Cycle with DRX Cycle (Discontinuous Reception Cycle, discontinuous reception period) as the reference period. When the satellite terminal is in the CONNECTED DRX state, the satellite transmits downlink data to the satellite terminal every other DRX Cycle.
(3) CONNECTED Non-DRX: and taking the first preset time length as a reference period, wherein the first preset time length can be set according to actual needs, for example, the first preset time length can be 40ms, and the reference period T basic = 40ms.
After determining the reference period, the evaluation period T may be determined to be an integer multiple of the reference period T basic, i.e., t=t basic ×n, where N may be any positive integer, and the specific size may be set according to the actual needs. And determining the evaluation period as an integer multiple of the reference period can enable downlink signal reception to exist in each evaluation period under the IDLE state and the CONNECTED DRX state, so that the working state of the antenna can be evaluated conveniently.
In step S32, the antenna evaluation module determines an evaluation enable.
In the embodiment of the application, when the antenna evaluation module determines that the evaluation period is reached or a preset event occurs, whether the evaluation of the second antenna meets the working condition or not can be determined according to the channel quality parameter of the first antenna, and when the channel quality parameter of the first antenna indicates that the channel condition of the first antenna is good, the evaluation of the second antenna meets the working condition or not can be canceled, so that the calculation resources are saved. For example, when the channel quality parameter of the first antenna indicates that the channel condition of the first antenna is poor, the first antenna may be blocked at this time, enabling an evaluation of whether the second antenna meets the operating condition; and when the channel quality parameter of the first antenna indicates that the channel condition of the first antenna is good, canceling the evaluation flow and waiting for the next periodic triggering or event triggering evaluation flow.
The antenna evaluation module 22 may determine the channel condition of the first antenna by the following channel quality parameters: SINR (Signal to Interference plus Noise Ratio, signal-to-noise ratio), RSRP (REFERENCE SIGNAL RECEIVING Power, reference signal received Power), BLER (Block Error Ratio, block error rate). Specifically, when the SINR is below a first preset threshold (e.g., SINR Threshold) and the RSRP is below a second preset threshold (e.g., RSRP Threshold); and/or, when the BLER is higher than a third preset threshold (e.g., BLER Threshold), the first antenna may be blocked, and the channel condition of the first antenna is poor. The first preset threshold, the second preset threshold and the third preset threshold can be set according to actual communication requirements.
In step S33, the antenna evaluation module determines an evaluation mode.
In the embodiment of the application, a plurality of evaluation modes can be configured in the satellite terminal so as to adapt to different working states of the satellite terminal and avoid affecting normal service transmission between the satellite terminal and the satellite. After the antenna evaluation module determines to enable evaluation, a corresponding evaluation mode is determined according to the working state of the satellite terminal, namely, the evaluation is performed through which antenna evaluation parameters are determined. The corresponding antenna evaluation parameters of the satellite terminal under different working states are as follows.
(1) IDLE and CONNECTED DRX: the antenna evaluation parameter may be a downlink received signal power parameter of each antenna, such as SINR, RSRP, etc., and since the satellite terminals in IDLE state and CONNECTED DRX state typically only receive downlink signals and receive downlink signals once every fixed PAGING CYCLE or DRX Cycle, the downlink received signal power parameter of each antenna may be measured.
(2) CONNECTED Non-DRX: the antenna evaluation parameter is an uplink transmission signal power parameter of the first antenna, and since information is frequently exchanged between the satellite terminal in the CONNECTED Non-DRX state and the satellite, switching the multiple antennas in the CONNECTED Non-DRX state easily interrupts ongoing continuous reception and transmission, and affects communication performance, the evaluation can be performed by measuring the uplink transmission signal power parameter of the first antenna (i.e., the current working antenna). The uplink transmission signal power parameters comprise an average value of uplink transmission power, an average value of uplink transmission power allowance and uplink transmission BLER; the uplink transmission power margin of each uplink signal is obtained according to the difference between the current uplink transmission power and the current maximum transmission power.
In step S34, the antenna evaluation module measures the antenna evaluation parameters according to the determined evaluation mode.
Specifically, step S341 and step S342 in fig. 3 are as follows.
In step S341, the antenna evaluation module measures the downlink received signal power parameters of each antenna.
In the embodiment of the application, if the working state of the satellite terminal is the IDLE state or the CONNECTED DRX state, the antenna evaluation module determines that the corresponding antenna evaluation parameter is the downlink received signal power parameter of each antenna, and the satellite will send downlink signals to the satellite terminal at intervals PAGING CYCLE or DRX cycles at a PO (Paging Occasion ), and the satellite terminal can acquire the downlink received signal power parameter at the PO. As shown in fig. 4, the antenna 1 receives a downlink signal at a PO, and after the measurement is completed, the next idle time slot SSB (Synchronized Signal Block, a synchronization signal block) is briefly switched to the next antenna 2 to be measured in the antenna system, so that the influence of the normal reception of the downlink signal due to the switching of the antenna is avoided, after the switching to the antenna 2, the antenna 2 receives the downlink signal at the next PO, and obtains the corresponding downlink received signal power parameter, and so on, the measurement calculation of the downlink received signal power parameter of each antenna is completed in an evaluation period. After the downlink received signal power parameters of all the antennas are measured, the working antenna can be switched back to the original working antenna, namely the first antenna, in the next idle time slot.
In step S342, the antenna evaluation module measures the uplink transmit signal power parameter of the working antenna.
In the embodiment of the application, if the working state of the satellite terminal is the CONNECTED Non-DRX state, the antenna evaluation module determines that the corresponding antenna evaluation parameter is the uplink transmission signal power parameter of the first antenna. The antenna evaluation module measures uplink transmission power and uplink transmission BLER of each uplink signal in an evaluation period, and obtains uplink transmission power allowance = maximum transmission power-uplink transmission power according to the uplink transmission power and the maximum transmission power, thereby obtaining an average value of the uplink transmission power allowance of each uplink signal.
In step S35, the antenna evaluation module performs antenna evaluation.
In the embodiment of the present application, after obtaining the measurement result of the antenna evaluation parameter according to step S341 and step S342, the antenna evaluation module evaluates according to the measurement result to obtain the optimal antenna.
(1) If the downlink received signal power parameters of the antennas are valid, that is, the current working state of the satellite terminal is IDLE or CONNECTED DRX, the antenna evaluation parameter is the downlink received signal power parameter of each antenna. At this time, if there is a second antenna that satisfies the working condition, that is, the difference between the SINR of the first antenna and the SINR of the second antenna is greater than the first preset threshold, and the difference between the RSRP of the first antenna and the RSRP of the second antenna is greater than the second preset threshold, the second antenna is used as the best antenna; otherwise, the first antenna is used as the optimal antenna, namely the current working antenna is used as the optimal antenna. The first preset threshold value and the second preset threshold value can be set according to actual needs.
(2) If the downlink received signal power parameters of the antennas are invalid, namely the current working state of the satellite terminal is the CONNECTED Non-DRX, the antenna evaluation parameter is the uplink transmitted signal power parameter of the first antenna. At this time, if the second antenna meets the working condition, that is, the average value of the uplink transmission power margin of the first antenna is lower than the third preset threshold value, and the BLER of the uplink transmission of the first antenna is higher than the fourth preset threshold value, the next antenna corresponding to the first antenna is used as the best antenna according to the preset antenna sequence, and then the communication with the satellite can be switched to be performed through the best antenna; otherwise, the first antenna is taken as the optimal antenna. The preset antenna sequence may be obtained by sorting according to the material of the antenna itself, the matching degree between the antenna and the current service scene, and the like, which is not limited herein. The third preset threshold value and the fourth preset threshold value can be set according to actual needs.
In step S36, the antenna evaluation module notifies the evaluation result.
In the embodiment of the present application, after the evaluation result including the best antenna is obtained in the above step S35, the antenna evaluation module 22 notifies the antenna switching module 23 of the evaluation result to switch to communicate with the satellite through the best antenna.
In the embodiment of the present application, the antenna switching module 23 receives the evaluation result notified by the antenna evaluation module 22, and when the received evaluation result indicates that the second antenna meets the working condition, controls the antenna switching switch 21 to switch to communicate with the satellite through the second antenna. The switching process shown in fig. 5 may include the following steps.
In step S51, the antenna switching module determines whether to switch.
In the embodiment of the present application, the evaluation result received by the antenna switching module 23 includes the best antenna obtained by the evaluation, and when the best antenna obtained by the evaluation is the same as the first antenna, the second antenna is indicated to not meet the working condition, so that the working antenna does not need to be switched; if the best antenna is different from the first antenna, the best antenna is the antenna in the second antenna, indicating that the second antenna meets the operating condition, the antenna switching module 23 needs to switch to communicate with the satellite through the second antenna (i.e., the best antenna).
In step S52, the antenna switching module determines a switching timing.
In the embodiment of the present application, after the antenna switching module 23 determines that the working antenna needs to be switched, the switching time, that is, the switching time, can be determined according to the working state of the satellite terminal, so that the influence of the switching antenna on normal service scheduling is avoided. For example, when the working state of the satellite terminal is the IDLE state or the CONNECTED DRX state, the switching time is the time of the satellite terminal for receiving data next time; when the working state of the satellite terminal is the CONNECTED Non-DRX state, the switching time is an idle time slot without service scheduling, so that the influence on normal service scheduling can be avoided. The no traffic schedule may be a schedule in which the PDCCH (Physical Downlink Control Channel ) does not detect the PDSCH (Physical Downlink SHARED CHANNEL, physical downlink shared channel).
In step S53, the antenna switching module completes the antenna switching.
In the embodiment of the present application, the antenna switching module 23 sends a switching instruction to the antenna switching switch 21 at the determined switching timing, and switches to communicate with the satellite through the optimal antenna.
In step S54, the antenna switching module maintains the working antenna.
In the embodiment of the present application, in order to avoid the antenna switching back and forth, after the antenna switching is completed, the periodic evaluation of the antenna by the antenna evaluation module 22 and the switching of the antenna by the antenna switching module 23 and the antenna switching switch 21 may be suspended within a second preset period of time, so as to maintain the satellite terminal to communicate with the satellite through the new working antenna for the second preset period of time. After switching to communication with the satellite through the new working antenna (i.e. the second antenna), the new working antenna is the first antenna at the moment, and when communication with the satellite through the first antenna continues for a second preset time period, a preset event occurs, and an evaluation flow is triggered.
In the embodiment of the application, when the duration of communication between the switched antenna and the satellite does not reach the second preset duration, if the working state of the satellite terminal is changed, that is, a preset event occurs, the evaluation flow is still triggered at the moment, so that the influence on normal communication between the satellite terminal and the satellite due to the change of the working state of the satellite terminal is avoided.
In step S55, the antenna switching module notifies the start evaluation.
In the embodiment of the present application, when the communication with the satellite through the first antenna continues for the second preset time period or the working state of the satellite terminal changes, that is, a preset event occurs, the antenna switching module 23 may notify the antenna evaluation module 22 that the evaluation flow may be restarted. For example, after the antenna evaluation module acquires the preset event, the antenna evaluation module periodically triggers an evaluation on whether the second antenna meets the working condition according to a preset evaluation period.
The satellite terminal provided by the embodiment of the application comprises an antenna change-over switch, an antenna evaluation module and an antenna change-over module; the intelligent identification of the optimal antenna and the completion of antenna switching can be realized. The antenna evaluation module can determine an evaluation period, identify an evaluation mode, flexibly select downlink received signal power parameters or uplink transmitted signal power parameters as the basis of antenna working condition evaluation according to the diversity of satellite terminal application scenes and through information such as working states, channel conditions and the like, and improves the accuracy of antenna working condition evaluation. In the antenna switching module, switching time is introduced, so that interruption of service (namely communication) caused by antenna switching is avoided; meanwhile, an antenna maintenance function is designed, unnecessary frequent switching or ping-pong switching is avoided, and service continuity is ensured.
As shown in a schematic view of a scenario of an example of the satellite terminal and satellite communication shown in fig. 2c, when the current satellite terminal communicates with the satellite through the top antenna for a second preset period of time, the antenna switching module notifies the antenna evaluation module to start an evaluation process, an antenna evaluation module (not shown in the figure) in the baseband processing system evaluates whether the side antenna meets the working condition, and notifies an antenna switching module (not shown in the figure) in the baseband processing system of the evaluation result, and when the received evaluation result indicates that the side antenna meets the working condition, the antenna switching module controls the antenna switching switch to communicate with the satellite through the side antenna, and maintains the communication with the satellite through the side antenna for the second preset period of time.
When the satellite terminal provided by the embodiment of the application is used, when the first antenna of the satellite terminal is shielded, namely, when the channel condition of the first antenna is poor and the communication performance is poor, the satellite terminal is switched to communicate with the satellite through the second antenna with better communication performance, so that the signal receiving and transmitting attenuation of the satellite terminal caused by the shielding of the antenna is effectively solved, and the communication performance is greatly improved. In addition, the satellite terminal can intelligently evaluate the working conditions of the antenna, so that the method is well suitable for application scenes of various satellite terminals and improves the accuracy of antenna switching.
Corresponding to the satellite terminal, the embodiment of the application also provides a communication method, as shown in fig. 6, which is applied to the satellite terminal, wherein the satellite terminal is provided with a first antenna and a second antenna, and the method comprises the following steps.
Step S61, communicating with a satellite through a first antenna;
step S62, when the second antenna meets the working condition, switching to communicate with the satellite through the second antenna.
In the technical scheme provided by the embodiment of the application, a plurality of antennas, such as the first antenna and the second antenna, are configured on the satellite terminal, the satellite terminal communicates with the satellite through the first antenna, and when the second antenna meets the working condition, the communication performance of the second antenna is better, and the second antenna is switched to communicate with the satellite through the second antenna. The satellite terminal automatically switches the working antenna through the evaluation of the working condition of the antenna, namely, switches the antenna which is in communication with the satellite, ensures the adoption of the antenna with better communication performance for communication with the satellite, improves the stability of the communication performance of the satellite terminal, and improves the user experience.
In some embodiments, the communication method may further include:
during communication with the satellite through the first antenna, an evaluation of whether the second antenna meets the operating condition is triggered according to a preset evaluation period or a preset event.
In some embodiments, the evaluation period may be determined based on the operating state of the satellite terminal.
In some embodiments, the operating state of the satellite terminal may correspond to a reference period, and the evaluation period may be an integer multiple of the reference period.
In some embodiments, when the working state of the satellite terminal is an idle state, the reference period may be a paging period;
When the working state of the satellite terminal is a discontinuous receiving state in a connection state, the reference period can be a discontinuous receiving period;
When the working state of the satellite terminal is a continuous receiving state in a connection state, the reference period may be a first preset duration.
In some embodiments, the predetermined event may be communication with the satellite through the first antenna for a second predetermined period of time, or a change in operating state.
In some embodiments, after the preset event is acquired, the evaluation of whether the second antenna meets the working condition may be triggered according to a preset evaluation period.
In some embodiments, the communication method further includes:
during communication with the satellite via the first antenna, an evaluation of whether the second antenna fulfils the operating conditions is enabled according to the channel quality parameters of the first antenna.
In some embodiments, the evaluation of whether the second antenna satisfies the operating condition may be enabled when the channel quality parameter of the first antenna indicates that the channel condition of the first antenna is poor.
In some embodiments, the channel quality parameter of the first antenna indicates that the channel condition of the first antenna is poor, may include:
The downlink signal-to-noise ratio SINR is lower than a first preset threshold value and the reference signal received power RSRP is lower than a second preset threshold value; and/or
The block error rate BLER received downstream is higher than a third preset threshold.
In some embodiments, the communication method may further include:
during the process of communicating with the satellite through the first antenna, measuring an antenna evaluation parameter corresponding to the working state of the satellite terminal;
and according to the antenna evaluation parameters, evaluating whether the second antenna meets the working conditions.
In some embodiments, the working state of the satellite terminal is a discontinuous reception state in an idle state or a connection state, and the corresponding antenna evaluation parameter may be a downlink received signal power parameter of each antenna.
In some embodiments, the downlink received signal power parameter may include SINR, RSRP;
The second antenna meeting the operating condition may include: the difference between the SINR of the first antenna and the SINR of the second antenna is greater than a first preset threshold value, and the difference between the RSRP of the first antenna and the RSRP of the second antenna is greater than a second preset threshold value.
In some embodiments, the downlink received signal power parameter for each antenna may be obtained by measurement during communication between the antenna and the satellite;
the time for switching the measured antenna may be an idle time slot after the measurement of the downlink received signal power parameter of the antenna is completed.
In some embodiments, the working state of the satellite terminal is a continuous receiving state in a connected state, and the corresponding antenna evaluation parameter may be an uplink transmission signal power parameter of the first antenna.
In some embodiments, the uplink transmission signal power parameter may include an average value of uplink transmission power headroom, and a BLER of uplink transmission;
The second antenna meeting the operating condition may include: the average value of the uplink transmission power margin of the first antenna is lower than a third preset threshold value, and the BLER of the uplink transmission of the first antenna is higher than a fourth preset threshold value.
In some embodiments, the number of second antennas may be a plurality;
the second antenna in communication with the satellite may be: and according to a preset antenna sequence, the next antenna corresponding to the first antenna is arranged.
In some embodiments, when the second antenna meets the operating condition, the communication method may further include:
Determining switching time according to the working state of the satellite terminal;
When the switching time is reached, a step of switching to communication with the satellite through the second antenna is performed.
In some embodiments, when the working state of the satellite terminal is an idle state or a discontinuous reception state in a connection state, the switching time may be the time of the satellite terminal for receiving data next time;
when the working state of the satellite terminal is a continuous receiving state in a connection state, the switching time can be an idle time slot.
In yet another embodiment of the present application, there is also provided a computer-readable storage medium having stored therein a computer program which, when executed by a processor, implements any of the above-described communication methods.
In yet another embodiment of the present application, there is also provided a computer program product containing instructions which, when run on a computer (such as the satellite terminal described above), cause the computer to perform any of the communication methods of the above embodiments.
In the above embodiments, it may be implemented in whole or in part by software, hardware, firmware, or any combination thereof. When implemented in software, may be implemented in whole or in part in the form of a computer program product. The computer program product includes one or more computer instructions. When loaded and executed on a computer, produces a flow or function in accordance with embodiments of the present application, in whole or in part. The computer may be a general purpose computer, a special purpose computer, a computer network, or other programmable apparatus. The computer instructions may be stored in or transmitted from one computer-readable storage medium to another, for example, by wired (e.g., coaxial cable, optical fiber, digital Subscriber Line (DSL)), or wireless (e.g., infrared, wireless, microwave, etc.). The computer readable storage medium may be any available medium that can be accessed by a computer or a data storage device such as a server, data center, etc. that contains an integration of one or more available media. The usable medium may be a magnetic medium (e.g., floppy disk, hard disk, tape), an optical medium (e.g., DVD), or a semiconductor medium (e.g., solid state disk Solid STATE DISK (SSD)), etc.
It is noted that relational terms such as first and second, and the like are used solely to distinguish one entity or action from another entity or action without necessarily requiring or implying any actual such relationship or order between such entities or actions. Moreover, the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such process, method, article, or apparatus. Without further limitation, an element defined by the phrase "comprising one … …" does not exclude the presence of other like elements in a process, method, article, or apparatus that comprises the element.
In this specification, each embodiment is described in a related manner, and identical and similar parts of each embodiment are all referred to each other, and each embodiment mainly describes differences from other embodiments. In particular, for the method, medium and computer program product embodiments, the description is relatively simple as it is substantially similar to the satellite terminal embodiments, with reference to the description of the satellite terminal embodiments in part.
The foregoing description is only of the preferred embodiments of the present application and is not intended to limit the scope of the present application. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present application are included in the protection scope of the present application.
Claims (28)
1. A communication method applied to a satellite terminal, the satellite terminal being configured with a first antenna and a second antenna, the method comprising:
communicating with a satellite through the first antenna;
And when the second antenna meets the working condition, switching to communicate with the satellite through the second antenna.
2. The method according to claim 1, wherein the method further comprises:
and triggering the evaluation of whether the second antenna meets the working condition according to a preset evaluation period or a preset event in the process of communicating with the satellite through the first antenna.
3. The method according to claim 2, wherein the evaluation period is determined based on an operating state of the satellite terminal.
4. A method according to claim 3, wherein the operating state of the satellite terminal corresponds to a reference period, and the evaluation period is an integer multiple of the reference period.
5. The method of claim 4, wherein the step of determining the position of the first electrode is performed,
When the working state of the satellite terminal is an idle state, the reference period is a paging period;
When the working state of the satellite terminal is a discontinuous receiving state in a connection state, the reference period is a discontinuous receiving period;
and when the working state of the satellite terminal is a continuous receiving state in a connection state, the reference period is a first preset duration.
6. The method of claim 2, wherein the predetermined event is the first antenna communicating with a satellite for a second predetermined period of time, or a change in operating state.
7. The method according to claim 2, characterized in that after a preset event is acquired, an evaluation of whether the second antenna fulfils an operating condition is triggered according to a preset evaluation period.
8. The method according to claim 1, wherein the method further comprises:
And in the process of communicating with the satellite through the first antenna, according to the channel quality parameter of the first antenna, enabling the evaluation of whether the second antenna meets the working condition.
9. The method of claim 8, wherein the evaluation of whether the second antenna satisfies the operating condition is enabled when the channel quality parameter of the first antenna indicates that the channel condition of the first antenna is poor.
10. The method of claim 9, wherein the channel quality parameter of the first antenna indicates that the channel condition of the first antenna is poor, comprising:
The downlink signal-to-noise ratio SINR is lower than a first preset threshold value and the reference signal received power RSRP is lower than a second preset threshold value; and/or
The block error rate BLER received downstream is higher than a third preset threshold.
11. The method according to claim 1, wherein the method further comprises:
During the process of communicating with a satellite through the first antenna, measuring an antenna evaluation parameter corresponding to the working state of the satellite terminal;
And according to the antenna evaluation parameters, evaluating whether the second antenna meets the working conditions.
12. The method of claim 11, wherein the step of determining the position of the probe is performed,
The working state of the satellite terminal is a discontinuous receiving state in an idle state or a connection state, and the corresponding antenna evaluation parameters are downlink received signal power parameters of each antenna.
13. The method of claim 12, wherein the downlink received signal power parameter comprises SINR, RSRP;
the second antenna meeting the operating condition includes: the difference value between the SINR of the first antenna and the SINR of the second antenna is larger than a first preset threshold value, and the difference value between the RSRP of the first antenna and the RSRP of the second antenna is larger than a second preset threshold value.
14. A method according to claim 12 or 13, wherein the downlink received signal power parameter for each antenna is obtained by measurement during communication between the antenna and the satellite;
The time for switching the measured antenna is the idle time slot after the measurement of the downlink received signal power parameter of the antenna is completed.
15. The method of claim 11, wherein the step of determining the position of the probe is performed,
The working state of the satellite terminal is a continuous receiving state in a connection state, and the corresponding antenna evaluation parameter is an uplink transmission signal power parameter of the first antenna.
16. The method according to claim 15, wherein the uplink transmission signal power parameter comprises an average value of uplink transmission power headroom, and an uplink transmission BLER;
the second antenna meeting the operating condition includes: and the average value of the uplink transmission power margin of the first antenna is lower than a third preset threshold value, and the BLER of the uplink transmission of the first antenna is higher than a fourth preset threshold value.
17. The method of claim 15 or 16, wherein the number of second antennas is a plurality;
the second antenna in communication with the satellite is: and according to a preset antenna sequence, the next antenna corresponding to the first antenna is arranged.
18. The method of claim 1, wherein when the second antenna meets an operating condition, the method further comprises:
determining switching time according to the working state of the satellite terminal;
And when the switching time is reached, executing the step of switching to communicate with a satellite through the second antenna.
19. The method of claim 18, wherein the step of providing the first information comprises,
When the working state of the satellite terminal is in an idle state or a discontinuous receiving state in a connection state, the switching time is the time for the satellite terminal to receive data next time;
And when the working state of the satellite terminal is a continuous receiving state in a connection state, the switching time is an idle time slot.
20. The satellite terminal is characterized in that a first antenna and a second antenna are configured on the satellite terminal, and the satellite terminal comprises an antenna change-over switch, an antenna evaluation module and an antenna change-over module;
the antenna change-over switch is used for selecting to communicate with a satellite through the first antenna;
the antenna evaluation module is used for evaluating whether the second antenna meets the working condition or not and notifying the evaluation result to the antenna switching module;
the antenna switching module is used for receiving the evaluation result notified by the antenna evaluation module, and controlling the antenna switching switch to communicate with a satellite through the second antenna when the received evaluation result indicates that the second antenna meets the working condition.
21. The satellite terminal of claim 20, wherein the antenna evaluation module is further configured to:
and triggering the evaluation of whether the second antenna meets the working condition according to a preset evaluation period or a preset event in the process of communicating with the satellite through the first antenna.
22. The satellite terminal of claim 21, wherein the antenna evaluation module is further configured to:
After a preset event is acquired, triggering the evaluation of whether the second antenna meets the working condition according to a preset evaluation period.
23. The satellite terminal of claim 20, wherein the antenna evaluation module is further configured to:
And in the process of communicating with the satellite through the first antenna, according to the channel quality parameter of the first antenna, enabling the evaluation of whether the second antenna meets the working condition.
24. The satellite terminal of claim 23, wherein the antenna evaluation module is further configured to:
and when the channel quality parameter of the first antenna indicates that the channel condition of the first antenna is poor, enabling the evaluation of whether the second antenna meets the working condition.
25. The satellite terminal of claim 20, wherein the antenna evaluation module is further configured to:
During the process of communicating with a satellite through the first antenna, measuring an antenna evaluation parameter corresponding to the working state of the satellite terminal;
And according to the antenna evaluation parameters, evaluating whether the second antenna meets the working conditions.
26. The satellite terminal of claim 20, wherein the antenna switching module is further configured to:
When the second antenna meets working conditions, determining switching time according to the working state of the satellite terminal;
And when the switching time is reached, executing the step of switching to communicate with a satellite through the second antenna.
27. The satellite terminal of claim 20, wherein the satellite terminal comprises an antenna system, an antenna switch, a radio frequency transceiver system, and a baseband processing system; the first antenna and the second antenna belong to the antenna system; the antenna evaluation module and the antenna switching module belong to the baseband processing system; the baseband processing system also comprises a baseband processing module;
the radio frequency receiving and transmitting system is used for transmitting signals between the antenna system and the baseband processing system and carrying out frequency conversion, sampling and power amplification processing on the transmitted signals;
the baseband processing module is used for carrying out baseband processing on signals to be received and transmitted.
28. The satellite terminal of claim 27, wherein the radio frequency transceiver system comprises: the device comprises a duplexer, a low-noise amplification module, a power amplification module, a radio frequency receiving module and a radio frequency transmitting module;
the duplexer is used for isolating the transmitted receiving signal and transmitting signal;
The low-noise amplification module is used for performing power amplification processing on the transmitted received signals;
the power amplification module is used for performing power amplification processing on the transmitted sending signals;
The radio frequency receiving module is used for carrying out frequency conversion and sampling processing on the transmitted receiving signals;
the radio frequency transmitting module is used for carrying out frequency conversion and sampling processing on the transmitted sending signals.
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| Application Number | Priority Date | Filing Date | Title |
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| CN202410263260.1A CN118232977A (en) | 2024-03-07 | 2024-03-07 | Communication method and satellite terminal |
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| Application Number | Priority Date | Filing Date | Title |
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| CN202410263260.1A CN118232977A (en) | 2024-03-07 | 2024-03-07 | Communication method and satellite terminal |
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| CN118232977A true CN118232977A (en) | 2024-06-21 |
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