CN113810093A - Carrier wave adjusting method, device, terminal, network equipment and storage medium - Google Patents
Carrier wave adjusting method, device, terminal, network equipment and storage medium Download PDFInfo
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- CN113810093A CN113810093A CN202010529570.5A CN202010529570A CN113810093A CN 113810093 A CN113810093 A CN 113810093A CN 202010529570 A CN202010529570 A CN 202010529570A CN 113810093 A CN113810093 A CN 113810093A
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04B—TRANSMISSION
- H04B7/00—Radio transmission systems, i.e. using radiation field
- H04B7/14—Relay systems
- H04B7/15—Active relay systems
- H04B7/185—Space-based or airborne stations; Stations for satellite systems
- H04B7/1851—Systems using a satellite or space-based relay
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04B—TRANSMISSION
- H04B7/00—Radio transmission systems, i.e. using radiation field
- H04B7/14—Relay systems
- H04B7/15—Active relay systems
- H04B7/185—Space-based or airborne stations; Stations for satellite systems
- H04B7/1851—Systems using a satellite or space-based relay
- H04B7/18519—Operations control, administration or maintenance
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04B—TRANSMISSION
- H04B7/00—Radio transmission systems, i.e. using radiation field
- H04B7/14—Relay systems
- H04B7/15—Active relay systems
- H04B7/185—Space-based or airborne stations; Stations for satellite systems
- H04B7/18578—Satellite systems for providing broadband data service to individual earth stations
- H04B7/18582—Arrangements for data linking, i.e. for data framing, for error recovery, for multiple access
Abstract
The application provides a carrier wave adjusting method, a device, a terminal, a network device and a storage medium, wherein the carrier wave adjusting method comprises the following steps: determining a target service carrier of the terminal according to the real-time signal-to-noise ratio of the terminal, wherein the target service carrier is a carrier expected to be used by the terminal; determining the attribute type of the terminal according to the target service carrier and the actual service carrier of the terminal, wherein the actual service carrier is the carrier actually used by the terminal; and adjusting the bandwidth of the actual service carrier according to the attribute type of the terminal. Therefore, the carrier resources of the system can be fully utilized, and the frequency spectrum utilization rate in satellite communication is improved. Moreover, while the high frequency spectrum utilization rate is kept, the anti-interference capability of the satellite communication system can be improved, the cost of a power amplifier of an accessed terminal is reduced, equipment with different antenna apertures can be supported, and the influence of different signal coverage area differences is reduced.
Description
Technical Field
The present application relates to the field of satellite communications technologies, and in particular, to a carrier adjustment method, apparatus, terminal, network device, and storage medium.
Background
In the DVB-RCS2 standard protocol of the Satellite communication System, Digital Video Broadcasting (DVB), a Second Generation Interactive application based Satellite communication System (DVB-RCS 2) adopt Time Division Multiplexing (TDM) transmission in the forward direction, Multi-frequency Time Division Multiple Access (MF-TDMA) transmission in the reverse direction, and support adaptive modulation and coding in the reverse transmission. When the bandwidth of the reverse carrier is fixed, the accessed terminal distributes radio frequency transmitting power by the fixed carrier bandwidth, and under the condition that the power amplifier is saturated, the accessed terminal can reach the maximum spectrum power; the signal-to-noise ratio is also maximized at this time, with the exclusion of interference factors. Therefore, the magnitude of the output power of the power amplifier directly affects the magnitude of the signal-to-noise ratio of the accessed terminal under the fixed bandwidth, and the magnitude of the signal-to-noise ratio directly affects the selection of the access device in the satellite communication system on the modulation and coding modes, and the spectrum efficiency corresponding to different modulation and coding modes is different, and there may be a great difference. For example: the spectrum efficiency obtained by using the 5/6 rate coding method in the Quadrature Phase Shift Keying (QPSK) modulation method is more than 3 times the spectrum efficiency obtained by using the 1/3 coding method in the QPSK modulation method.
From the above information, when the power is constant, the wider the bandwidth is, the lower the power spectral density is, i.e., the lower the signal-to-noise ratio is; if the power spectral density remains the same but the bandwidth increases, the power will necessarily increase, requiring a larger power amplifier. Therefore, power amplification, bandwidth and signal-to-noise ratio are three key factors affecting the utilization rate of the system spectrum. Since the spectrum resources of the satellite communication system are few, the utilization of the spectrum resources (i.e., the spectrum utilization rate) is an important index for evaluating the service quality of the satellite communication system.
Currently, the satellite communication system mainly has the following problems: 1) the power amplifier of the accessed terminal has too high cost, the price of the power amplifier is in direct proportion to the power of the power amplifier, the power of the power amplifier indirectly affects the utilization rate of the satellite bandwidth spectrum, and the size of the antenna aperture also directly affects the gain of signals (for example, the gain of an antenna with an aperture of 90cm is more than that of an antenna with an aperture of 60cm and is close to 3 dB), and the larger the antenna aperture is, the higher the equipment cost is. 2) The anti-jamming capability is poor, the influence of weather on the satellite high-frequency band is very large, and when the satellite high-frequency band is rainy, the signal-to-noise ratio of the satellite high-frequency band is influenced due to the fact that signals of the satellite high-frequency band are attenuated, and the satellite frequency spectrum utilization rate is low. 3) The coverage of satellite signals has regional differences, the Equivalent Isotropic Radiated Power (EIRP) of different regions is different, and under the condition that other conditions of the terminal are not changed, the signal-to-noise ratios of the satellite signals in different regions are different, and the application spectrum efficiency of the region with poor satellite signals is low.
Disclosure of Invention
The application provides a carrier wave adjusting method, a carrier wave adjusting device, a terminal, network equipment and a storage medium. The method is used for solving the problem of low frequency spectrum utilization rate in satellite communication caused by the reasons that the cost of a power amplifier in a satellite communication system in the prior art is too high, the anti-interference capability is poor, the coverage of satellite signals has regional difference and the like.
The embodiment of the application provides a carrier wave adjusting method, which comprises the following steps: determining a target service carrier of the terminal according to the real-time signal-to-noise ratio of the terminal, wherein the target service carrier is a carrier expected to be used by the terminal; determining the attribute type of the terminal according to the target service carrier and the actual service carrier of the terminal, wherein the actual service carrier is the carrier actually used by the terminal; and adjusting the bandwidth of the actual service carrier according to the attribute type of the terminal.
The method comprises the steps of determining a target service carrier of a terminal through a real-time signal-to-noise ratio of an accessed terminal, determining an attribute type of the terminal according to the target service carrier and an actual service carrier of the terminal, and adjusting the bandwidth of each carrier according to the attribute type of the terminal so as to adapt to the real-time requirement of the terminal. Therefore, the carrier resources of the system can be fully utilized, and the frequency spectrum utilization rate in satellite communication is improved. Moreover, while the high frequency spectrum utilization rate is kept, the anti-interference capability of the satellite communication system can be improved, the cost of a power amplifier of an accessed terminal is reduced, equipment with different antenna apertures can be supported, and the influence of different signal coverage area differences is reduced.
The embodiment of the application provides another carrier adjustment method, which comprises the following steps: selecting a target access carrier according to a theoretical signal-to-noise ratio, wherein the theoretical signal-to-noise ratio is a theoretical value of the signal-to-noise ratio when a signal sent by a terminal reaches access network equipment; and sending an access request to the access network equipment through the target access carrier, so that the access network equipment determines the attribute class of the terminal according to the target service carrier of the terminal and the actual service carrier of the terminal, and adjusts the bandwidth of the actual service carrier according to the attribute class of the terminal.
The target access carrier is selected according to the theoretical signal-to-noise ratio, so that the access request can be sent to the access network equipment through the target access carrier, after the access network equipment receives the access request, the attribute type of the terminal can be determined according to the target service carrier of the terminal and the actual service carrier of the terminal, and the bandwidth of the actual service carrier is adjusted according to the attribute type of the terminal. And idle carrier resources can be fully utilized, so that the frequency spectrum utilization rate in the satellite communication system is improved.
An embodiment of the present application provides a carrier adjustment apparatus, including: the target service carrier determining module is used for determining a target service carrier of the terminal according to the real-time signal-to-noise ratio of the terminal, wherein the target service carrier is a carrier expected to be used by the terminal; the classification module is used for determining the attribute category of the terminal according to the target service carrier and the actual service carrier of the terminal, wherein the actual service carrier is the carrier actually used by the terminal; and the adjusting module is used for adjusting the bandwidth of the actual service carrier according to the attribute type of the terminal.
The method comprises the steps that a target service carrier of a terminal is determined through a target service carrier determining module according to the real-time signal-to-noise ratio of the accessed terminal, the attribute category of the terminal is determined through a classifying module according to the target service carrier and the actual service carrier of the terminal, and then the bandwidth of each carrier is adjusted through an adjusting module according to the attribute category of the terminal so as to adapt to the real-time requirement of the terminal. Therefore, the carrier resources of the system can be fully utilized, and the frequency spectrum utilization rate in satellite communication is improved. Moreover, while the high frequency spectrum utilization rate is kept, the anti-interference capability of the satellite communication system can be improved, the cost of a power amplifier of an accessed terminal is reduced, equipment with different antenna apertures can be supported, and the influence of different signal coverage area differences is reduced.
An embodiment of the present application provides a terminal, which includes: the selection module is used for selecting a target access carrier according to a theoretical signal-to-noise ratio, wherein the theoretical signal-to-noise ratio is a theoretical value of the signal-to-noise ratio when a signal sent by a terminal reaches access network equipment; and the sending module is used for sending the access request to the access network equipment through the target access carrier so that the access network equipment determines the attribute type of the terminal according to the target service carrier of the terminal and the actual service carrier of the terminal, and adjusts the bandwidth of the actual service carrier according to the attribute type of the terminal.
The target access carrier is selected by using the selection module according to the theoretical signal-to-noise ratio, so that the target access carrier can be accessed, the access request is sent to the access network equipment by using the sending module, the access network equipment can determine the attribute class of the terminal according to the target service carrier of the terminal and the actual service carrier of the terminal, and the bandwidth of the actual service carrier is adjusted according to the attribute class of the terminal. And idle carrier resources can be fully utilized, so that the frequency spectrum utilization rate in the satellite communication system is improved.
An embodiment of the present application provides a network device, including: one or more processors; a memory on which one or more programs are stored, the one or more programs, when executed by the one or more processors, cause the one or more processors to implement any one of the carrier adjustment methods in the embodiments of the present application.
The embodiment of the present application provides a storage medium, where a computer program is stored, and when the computer program is executed by a processor, the method for adjusting a carrier wave in the embodiment of the present application is implemented.
With regard to the above embodiments and other aspects of the present application and implementations thereof, further description is provided in the accompanying drawings description, detailed description and claims.
Drawings
Fig. 1 shows a flowchart of a carrier adjustment method according to an embodiment of the present application.
Fig. 2 is a flowchart illustrating a carrier adjustment method according to another embodiment of the present application.
Fig. 3 is a flowchart illustrating a carrier adjustment method according to still another embodiment of the present application.
Fig. 4 shows a schematic structural diagram of a carrier adjustment apparatus according to an embodiment of the present application.
Fig. 5 illustrates a block diagram of a terminal according to an embodiment of the present application.
Fig. 6 is a block diagram illustrating an exemplary hardware architecture of a computing device capable of implementing the carrier adjustment method and apparatus according to an embodiment of the present application.
Detailed Description
In order to make those skilled in the art better understand the technical solution of the present application, a carrier adjustment method, an apparatus, a terminal, a network device, and a storage medium provided in the present application are described in detail below with reference to the accompanying drawings.
Example embodiments will be described more fully hereinafter with reference to the accompanying drawings, but which may be embodied in different forms and should not be construed as limited to the embodiments set forth herein. Rather, these embodiments are provided so that this disclosure will be thorough and complete, and will fully convey the scope of the disclosure to those skilled in the art.
Unless otherwise defined, all terms (including technical and scientific terms) used herein have the same meaning as commonly understood by one of ordinary skill in the art. It will be further understood that terms, such as those defined in commonly used dictionaries, should be interpreted as having a meaning that is consistent with their meaning in the context of the relevant art and the present application and will not be interpreted in an idealized or overly formal sense unless expressly so defined herein.
The satellite communication system has the following problems: 1) the power amplifier of the accessed terminal equipment has too high cost. For example, in usage scenario 1, that is, under coverage of a satellite-type asia-pacific 7 based on the KU frequency band (downlink from 10.7GHz to 12.75GHz, and uplink from 12.75GHz to 18.1GHz), the accessed terminal employs a 60 cm-aperture antenna and a 6W power amplifier, and operates under a transmission bandwidth of 2 MHz. The signal-to-noise ratio of the reverse signal of the accessed terminal reaching the access network equipment through the asia-pacific 7 synchronous satellite can reach about 10dB at most, and when the accessed terminal uses an 5/6 rate coding mode in a Quadrature Phase Shift Keying (QPSK) modulation mode to transmit information, the maximum rate can reach about 2.8M/bps. The price of a power amplifier in the accessed terminal is in direct proportion to the magnitude of the power amplifier power of the power amplifier, and in order to reduce the cost of the accessed terminal equipment, if the power amplifier power of the accessed terminal is reduced from 6W to 3W, the maximum signal-to-noise ratio can only reach about 7 dB; if the 2/3 rate coding mode in the QPSK modulation mode is used to transmit information, the maximum rate can reach about 2.1M/bps, and the spectrum utilization rate of the access terminal using 3M power amplifier power can only reach 75% of that of the access terminal using 6W power amplifier power, so that when the access terminal reduces the power amplifier cost and other conditions are not changed, the cost of spectrum resources is increased.
2) The anti-interference capability is poor. For example, also in usage scenario 1, the signal-to-noise ratio of the accessed terminal is about 10dB, and the maximum rate can reach about 2.8M/bps. When severe weather conditions occur (e.g., heavy rain), the actual signal-to-noise ratio can only reach 7dB assuming 3dB of rain attenuation. Here, the rain attenuation refers to attenuation caused by electric waves entering a rain layer, for example, attenuation caused by rain particle absorption and attenuation caused by rain particle scattering. When information is transmitted by using an 2/3 rate coding mode in a QPSK modulation mode, the maximum rate can reach about 2.1M/bps, the spectral efficiency of the system can be reduced to 75%, the bandwidth spectrum utilization rate is directly influenced, and meanwhile, the user experience is poor.
3) There are regional differences in satellite signal coverage. Assuming that the satellite Equivalent Isotropic Radiated Power (EIRP) of a satellite signal coverage area a is 55dBw and the satellite EIRP of an area B is 52dBw, if the master station works in the area a, the reverse signal-to-noise ratio of the access terminal can reach 10 dB; when the master station works in the B area, the reverse signal-to-noise ratio of the accessed terminal can only reach 7dB, namely when the master station works in different areas, the reverse spectrum efficiency of the accessed terminal is different.
If the satellite G/T of the satellite signal coverage area A is 10dB/K and the satellite G/T of the area B is 7dB/K, if the access terminal works in the area A, the reverse signal-to-noise ratio of the access terminal can reach 10 dB; when the access terminal works in the B area, the reverse signal-to-noise ratio of the accessed terminal can only reach 7dB, namely, when the access terminal works in different areas, the reverse spectrum efficiency of the access terminal is different.
In order to solve the above problems, the present application provides a carrier adjustment method, apparatus, terminal, network device, and storage medium. On the basis of keeping high spectrum utilization rate, the anti-interference capability of a satellite communication system can be improved, the cost of a power amplifier of an accessed terminal can be reduced, equipment with different antenna apertures can be supported, and the influence of different signal coverage area differences can be reduced.
Fig. 1 shows a flowchart of a carrier adjustment method according to an embodiment of the present application. The carrier adjustment method can be applied to access network equipment, such as a satellite base station and the like. As shown in fig. 1, the carrier adjustment method provided in this embodiment includes the following steps.
And step 110, determining a target service carrier of the terminal according to the real-time signal-to-noise ratio of the terminal.
Wherein the target serving carrier is a carrier that the terminal desires to use. For example, when the real-time signal-to-noise ratio of the terminal a is greater than a preset signal-to-noise ratio threshold (e.g., 7dB), the access network device may select a carrier with a bandwidth of 1MHz for the terminal a as a target service carrier of the terminal a; otherwise, when the initial access signal-to-noise ratio of the terminal a is less than or equal to 7dB, the access network device may select a carrier with a bandwidth of 0.5MHz for the terminal a as the target serving carrier of the terminal a.
It should be noted that the actual serving carrier is a carrier actually used by the terminal. Counting the number of terminals served by a target service carrier and the occupied condition of the current resource of the target service carrier; then, the number of terminals currently served by the actual service carrier and the occupied condition of the current resource of the actual service carrier are counted to obtain a second statistical result, the first statistical result is compared with the second statistical result, and the attribute type of the terminal is further determined, for example, whether the terminal needs to change the corresponding service carrier is determined, if yes, the attribute type of the terminal is determined to be the attribute type to be changed, otherwise, the attribute type of the terminal is determined to be the attribute type which does not need to be changed.
In some implementations, step 120 may be implemented as follows: when the target service carrier is inconsistent with the actual service carrier, counting the service demand of the terminal; and determining the attribute type of the terminal according to the service demand of the terminal, the target service carrier and the actual service carrier.
For example, the target service carrier of the terminal is a carrier with a bandwidth of 0.5MHz, but the carrier with a bandwidth of 1MHz is currently providing services for the terminal, and the attribute class of the terminal is determined by counting the traffic demand of the terminal (for example, roughly counting the bandwidth situation required by the terminal by the current traffic type of the terminal), and further comprehensively considering the traffic demand, the target service carrier of the terminal, and the actual service carrier.
The determining the attribute type of the terminal according to the service demand of the terminal, the target service carrier and the actual service carrier includes: when the bandwidth of a target service carrier of the terminal is determined to be smaller than the bandwidth of an actual service carrier of the terminal and the service demand of the terminal is less than or equal to a preset service demand threshold, determining that the attribute class of the terminal is a first attribute class; and when the bandwidth of the target service carrier of the terminal is determined to be larger than the bandwidth of the actual service carrier of the terminal and the service demand of the terminal is determined to be larger than a preset service demand threshold, determining that the attribute class of the terminal is a second attribute class.
For example, if the target serving carrier of the terminal is a carrier with a bandwidth of 0.5MHz, but a carrier with a bandwidth of 1MHz is currently serving for the terminal, but the terminal is looking at a novel, the required bandwidth resource is less, and a larger bandwidth resource is not required to be occupied, it is determined that the attribute class of the terminal is the second attribute class; otherwise, if the target service carrier of the terminal is a carrier with a bandwidth of 1MHz, but the carrier with a bandwidth of 0.5MHz is currently serving for the terminal, but the terminal is downloading a video file, the required bandwidth resource is more, and the access network device is required to provide a larger bandwidth resource, it is determined that the attribute class of the terminal is the first attribute class.
In some embodiments, the attribute types of the terminals are different, and the adjustment modes corresponding to the actual service carriers of the terminals are also different. It is possible to split the actual service carrier, or to combine multiple actual service carriers to meet different service requirements of the terminal. The above adjustment manner for the bandwidth of the actual service carrier is only an example, and may be set according to an actual situation, and other adjustment manners for the bandwidth of the actual service carrier, which are not described, are also within the protection scope of the present application, and are not described herein again.
In some implementations, step 130 may be implemented as follows: when the attribute class of the terminal is a first attribute class, counting the number of carriers needing bandwidth splitting to obtain the number of the first class of carriers; adjusting the bandwidth of the actual service carrier according to the number of the first type of carrier; or when the attribute type of the terminal is the second attribute type, counting the number of carriers needing bandwidth combination to obtain the number of the second type of carriers; and adjusting the bandwidth of the actual service carrier according to the number of the second type of carrier.
It should be noted that, when the attribute class of the terminal is the first attribute class, it indicates that the current terminal can meet the requirement of the terminal without too many bandwidth resources, so that the actual service carrier of the terminal is wasted, and therefore, the bandwidth of the actual service carrier of the terminal can be split, for example, the actual service carrier of the terminal is a carrier with a bandwidth of 1MHz, and the terminal can complete its service only with a carrier with a bandwidth of 0.5MHz, so that the actual service carrier of the terminal (i.e., a carrier with a bandwidth of 1 MHz) is split into two carriers with a bandwidth of 0.5MHz (i.e., a first type carrier). One carrier with the bandwidth of 0.5MHz still provides service for the terminal, and the rest carrier with the bandwidth of 0.5MHz can be released to provide service for other terminals, so that the frequency band utilization rate of the system is improved. The number of carriers needing bandwidth splitting is determined by counting the number of terminals with the attribute class of the terminal accessed in the system being the first attribute class, and then the number of the first class carriers is obtained. And adjusting the bandwidth of the actual service carrier of the terminal according to the number of the first type carriers and the requirement of the terminal. For example, two first type carriers are combined into one carrier, and the combined carrier is used as an actual service carrier of the terminal for the terminal to use.
When the attribute class of the terminal is the second attribute class, the actual service carrier currently allocated to the terminal is not enough to support the service requirement of the terminal, and the terminal needs more bandwidth resources, so that the idle carrier resources in the system can be inquired, and then the actual service carrier of the terminal and the idle carrier resources obtained by inquiry are combined to obtain the second class carrier. The number of carriers needing bandwidth combination is determined by counting the number of terminals with the attribute type of the terminal accessed in the system being the second attribute type, and then the number of the second type carriers is obtained. And adjusting the bandwidth of the actual service carrier of the terminal according to the number of the second type of carrier and the requirement of the terminal. For example, one second type carrier is split into two different carriers, and one of the split carriers is used as an actual service carrier of the terminal for the terminal to use.
In a specific implementation, the amount of the carrier bandwidth to be increased is determined by comprehensively considering the amount of the first type of carrier and the amount of the second type of carrier, so that the access network device can reasonably divide the baseband bandwidth according to the amount of the carrier bandwidth to be increased, and the utilization rate of the carrier bandwidth is improved. For example, the access network device originally divides a baseband bandwidth into 5 bandwidths of 1MHz carriers and 10 bandwidths of 0.5MHz carriers, counts to obtain that the number of the first type carriers is 1, and the number of the second type carriers is 1, that is, the number of carriers needing to split 1 carrier of 1MHz bandwidth into 2 carriers of 0.5MHz bandwidth is 1, and at the same time, the number of carriers needing to merge 2 carriers of 0.5MHz bandwidth into one carrier of 1MHz bandwidth is 1, that is, the amount of demand to be increased of the carrier bandwidth is 2, the access network device dynamically configures the original bandwidths of 5 carriers of 1MHz and 10 carriers of 0.5MHz into 4 bandwidths of 1MHz and 12 bandwidths of carriers of 0.5 MHz. So as to meet the requirements of the terminal and improve the frequency band utilization rate of the system.
In this embodiment, a target service carrier of a terminal is determined by a real-time signal-to-noise ratio of an accessed terminal, an attribute type of the terminal is determined according to the target service carrier and an actual service carrier of the terminal, and then a bandwidth of each carrier is adjusted according to the attribute type of the terminal, so as to meet a real-time requirement of the terminal, ensure that most accessed terminals can send information by using a high-order modulation coding mode, fully utilize carrier resources of a satellite communication system, and improve a spectrum utilization rate in the satellite communication system. Moreover, while the high frequency spectrum utilization rate is kept, the anti-interference capability of the satellite communication system can be improved, the cost of a power amplifier of an accessed terminal is reduced, equipment with different antenna apertures can be supported, and the influence of different signal coverage area differences is reduced.
In some implementations, before step 110, it may further include: the real-time signal-to-noise ratio of the terminal is measured periodically.
In the embodiment, by periodically measuring the real-time signal-to-noise ratio of the terminal, the communication condition of the terminal, such as whether the terminal has strong noise interference or not during communication, can be obtained in real time. If the noise interference of the terminal is strengthened, the access network equipment can adjust the radio frequency emission power of the terminal in real time so as to improve the communication quality between the access network equipment and the terminal.
In some implementations, after step 130, it may further include: and if the bandwidth of the adjusted actual service carrier is determined to be smaller than the service requirement bandwidth of the terminal, switching the terminal from the actual service carrier to the target service carrier to work.
For example, when a user of a terminal watches a video file on line, the service demand bandwidth of the terminal is increased a lot instantly, and a network side device needs to allocate more carrier bandwidths to the terminal, but the bandwidth of the adjusted actual service carrier cannot meet the service demand bandwidth of the terminal, so that the terminal needs to be switched from the actual service carrier to a target service carrier to work, so that the terminal can send data in a high-order modulation coding manner, and simultaneously, receive and process the data sent by the network side device in the high-order modulation coding manner. The bandwidth of the target service carrier can meet the service requirement bandwidth of the terminal, and the user experience is improved while the system frequency spectrum utilization rate is improved.
In this embodiment, the service carrier of the terminal is dynamically switched, that is, the terminal is switched from the actual service carrier to the target service carrier to operate, so that the bandwidth of the target service carrier can meet the service requirement bandwidth of the terminal, the carrier bandwidth resource of the system is fully utilized, and the spectrum utilization rate of the system is improved.
Fig. 2 is a flowchart illustrating a carrier adjustment method according to another embodiment of the present application. The carrier adjustment method can be applied to access network equipment, such as a satellite base station and the like. As shown in fig. 2, the carrier adjustment method includes the following steps:
and step 210, counting the load information of each working carrier.
The working carrier is obtained by dividing the baseband bandwidth.
In order to control inter-carrier interference in the frequency division multiplexing system, a guard band is set between carriers, and for the sake of simplicity, the present application takes a baseband bandwidth as an example, and does not consider the influence of the guard band. The satellite communication system can support carriers with different bandwidths, and the access network equipment periodically counts the load information of the carriers with various bandwidths.
For example, the baseband bandwidth is 10MHz, the access network device may divide 10MHz into 5 carriers of 1MHz and 10 carriers of 0.5MHz by default, and periodically send the above carrier allocation information to all accessed terminals under the signal coverage of the access network device in the form of broadcast messages using a broadcast channel.
For example, the theoretical snr of the terminal a is 10dB, the access network device receives the access request of the terminal a through the access channel, and estimates and obtains the initial access snr of the terminal a as 6dB according to the access channel. The estimation can adopt the Link Budget (Link Budget) theory to calculate and obtain the initial access signal-to-noise ratio, and can also adopt the relevant parameters of the access channel, adopt the channel estimation and other modes to estimate and obtain the initial access signal-to-noise ratio. The above estimation is only an example, and may be set according to actual situations, and other non-illustrated estimation methods are also within the protection scope of the present application, and are not described herein again.
It should be noted that the access network device may periodically perform statistics on the load information of each working carrier to determine whether the current spectrum utilization rate is qualified, for example, a phenomenon that a first working carrier is overloaded, a second working carrier is in an idle state, a resource utilization rate of a third working carrier does not reach 50%, and the like.
For example, when the initial access signal-to-noise ratio of the terminal a is greater than a preset signal-to-noise ratio threshold (e.g., 7dB), the access network device selects a carrier with a bandwidth of 1MHz for the terminal a as an initial target serving carrier of the terminal a; otherwise, when the initial access signal-to-noise ratio of the terminal a is less than or equal to 7dB, the access network device may select a carrier with a bandwidth of 0.5MHz for the terminal a as the initial target serving carrier of the terminal a. If the phenomenon that the carrier with the 0.5MHz bandwidth is overloaded (for example, the utilization rate of the carrier with the 0.5MHz bandwidth is already over 98%) is measured at a certain time, and the carrier with the 1MHz bandwidth does not have the overload phenomenon at this time, the access network device may select the carrier with the 1MHz bandwidth as the target service carrier of the terminal a.
It should be noted that the initial target serving carrier is a target serving carrier allocated by the access network device to the terminal when the terminal initially accesses the access device. Since the access network device will periodically measure the snr of the terminal, the target serving carrier will also periodically change. For example, when a certain measurement obtains the signal-to-noise ratio of the terminal, the last target serving carrier of the terminal is the current actual serving carrier of the terminal. For example, the target service carrier corresponding to the signal-to-noise ratio of the terminal obtained by the last measurement is a carrier with a bandwidth of 1 MHz; because the service requirement of the terminal is reduced, the target service carrier corresponding to the signal-to-noise ratio of the terminal obtained by the measurement is the carrier with the bandwidth of 0.5MHz, and at this time, the carrier with the bandwidth of 1MHz is the actual service carrier of the terminal.
And 240, determining the target service carrier of the terminal according to the real-time signal-to-noise ratio of the terminal.
It should be noted that steps 240 to 260 in this embodiment are the same as steps 110 to 130 in the previous embodiment, and are not described herein again.
In this embodiment, the load information of each working carrier is counted, so that the working condition of each working carrier can be known, and the initial access signal-to-noise ratio of the terminal is estimated in response to an access request sent by the terminal; the method comprises the steps of determining an initial target service carrier by initially accessing a signal-to-noise ratio, comparing the load information of the initial target service carrier with load information of each working carrier in a system, screening out a target service carrier meeting the requirements of a terminal, further determining the target service carrier of the terminal according to the real-time signal-to-noise ratio of the terminal in real time, and further determining the attribute type of the terminal, so that the bandwidth of the actual service carrier can be dynamically adjusted according to the attribute type of the terminal, and further adjusting the target service carrier of the terminal, ensuring that most accessed terminals transmit data by using a high-order modulation coding mode, fully utilizing the carrier resources of the system, improving the spectrum utilization rate in satellite communication, and simultaneously improving the anti-interference capability of the satellite communication system and the user experience degree.
Fig. 3 is a flowchart illustrating a carrier adjustment method according to yet another embodiment of the present application. The carrier adjustment method can be applied to a terminal, such as a smart phone. As shown in fig. 3, the carrier adjustment method provided in this embodiment includes the following steps.
And 310, selecting a target access carrier according to the theoretical signal-to-noise ratio.
The theoretical signal-to-noise ratio is a theoretical value of the signal-to-noise ratio when a signal sent by the terminal reaches the access network equipment.
For example, it is preset that when the theoretical snr is greater than a preset snr threshold (e.g., 7dB), the terminal a selects a carrier with a bandwidth of 1MHz as its target access carrier; otherwise, when the theoretical snr is less than or equal to 7dB, terminal a may select a carrier with a bandwidth of 0.5MHz as its target access carrier. And through estimation, the theoretical signal-to-noise ratio of the terminal A is determined to be 10dB, and the terminal A selects the carrier wave with the bandwidth of 1MHz as the target access carrier wave. If the terminal A uses a 3W power amplifier, under the condition that other conditions are not changed, the theoretical signal-to-noise ratio of the terminal A is obtained by estimation to be 6dB, and the terminal A selects a carrier wave with a bandwidth of 0.5MHz as a target access carrier wave.
In some implementations, before step 310, further comprising: and estimating and obtaining a theoretical signal-to-noise ratio according to the specification of the power amplifier, the aperture gain of the antenna, the equivalent isotropic radiated power (namely EIRP) information of the area, the reverse carrier information and the performance index. Wherein, the reverse carrier information includes any one of carrier bandwidth and frequency band information of the carrier. It should be noted that the performance index includes a G/T value, and a theoretical signal-to-noise ratio can be estimated and obtained according to the G/T value, where G represents a receiving gain of the antenna, and T represents a noise temperature of the receiving system.
For example, the EIRP of the first service satellite is 55dBw, and the area where the access terminal a is located is 123 ° east longitude and 30 ° north latitude. When the terminal A uses a 6W power amplifier and a 60 cm-caliber reflector antenna and selects a first service satellite to perform communication service for the terminal A, the maximum theoretical signal-to-noise ratio when the terminal A reaches an access network device (for example, a base station of the first server satellite) can be estimated to be 10dB by taking 1MHz bandwidth as a reference and through theoretical calculation of link budget.
Where link budget refers to accounting for all gains and attenuations in the transmit end, the communication link, the propagation environment (e.g., atmosphere, coaxial cable, waveguide, fiber, etc.), and the receive end in a communication system.
After receiving an access request sent by a terminal, an access network device determines the attribute type of the terminal according to a target service carrier of the terminal and an actual service carrier of the terminal, and adjusts the bandwidth of the actual service carrier according to the attribute type of the terminal. The terminal can obtain the optimal carrier wave to serve the terminal, and meanwhile, the bandwidth of the actual service carrier wave is adjusted through the access network equipment, so that the frequency spectrum utilization rate of the carrier wave is improved, and the carrier wave resources of the system can be fully utilized.
In one implementation, after the access network device adjusts the bandwidth of the actual service carrier according to the attribute category of the terminal, the access network device may send the adjusted carrier information to the terminal, so that the terminal can re-access the access network device according to the new adjusted carrier information, for example, the terminal performs hard handover or the like, and it is ensured that the terminal can find the carrier most suitable for itself to access, and the spectrum utilization rate of the carrier is improved while the terminal is closer to the requirements of the terminal user, so as to improve the user experience.
In this embodiment, the target access carrier is selected according to the theoretical signal-to-noise ratio, so that the access request can be sent to the access network device through the target access carrier, and the access network device can determine the attribute type of the terminal according to the target service carrier of the terminal and the actual service carrier of the terminal, and adjust the bandwidth of the actual service carrier according to the attribute type of the terminal. And idle carrier resources can be fully utilized, so that the frequency spectrum utilization rate in the satellite communication system is improved. The method can improve the anti-interference capability of a satellite communication system, reduce the cost of a power amplifier of an accessed terminal, support equipment with different antenna apertures and reduce the influence of different signal coverage area differences while keeping higher frequency spectrum utilization rate.
It is to be understood that the invention is not limited to the particular arrangements and instrumentality described in the above embodiments and shown in the drawings. For convenience and brevity of description, detailed description of a known method is omitted here, and for the specific working processes of the system, the module and the unit described above, reference may be made to corresponding processes in the foregoing method embodiments, which are not described herein again.
Fig. 4 is a schematic structural diagram of a carrier adjustment apparatus according to an embodiment of the present invention. The carrier adjusting device can be applied to access network equipment, such as a satellite base station and the like. As shown in fig. 4, the carrier adjustment apparatus may include the following modules.
A target service carrier determining module 410, configured to determine a target service carrier of a terminal according to a real-time signal-to-noise ratio of the terminal, where the target service carrier is a carrier that the terminal expects to use; a classification module 420, configured to determine an attribute class of a terminal according to a target service carrier and an actual service carrier of the terminal, where the actual service carrier is a carrier actually used by the terminal; and an adjusting module 430, configured to adjust a bandwidth of an actual service carrier according to the attribute type of the terminal.
In this embodiment, the target service carrier of the terminal is determined by the target service carrier determining module according to the real-time signal-to-noise ratio of the accessed terminal, the attribute category of the terminal is determined by the classification module according to the target service carrier and the actual service carrier of the terminal, and the bandwidth of each carrier is adjusted by the adjusting module according to the attribute category of the terminal, so as to meet the real-time requirement of the terminal. Therefore, the carrier resources of the system can be fully utilized, and the frequency spectrum utilization rate in satellite communication is improved. Moreover, while the high frequency spectrum utilization rate is kept, the anti-interference capability of the satellite communication system can be improved, the cost of a power amplifier of an accessed terminal is reduced, equipment with different antenna apertures can be supported, and the influence of different signal coverage area differences is reduced.
Fig. 5 is a block diagram illustrating a terminal according to an embodiment of the present disclosure. As shown in fig. 5, the terminal may include the following modules: a selecting module 510, configured to select a target access carrier according to a theoretical signal-to-noise ratio, where the theoretical signal-to-noise ratio is a theoretical value of a signal-to-noise ratio when a signal sent by a terminal reaches an access network device; a sending module 520, configured to send an access request to the access network device through the target access carrier, so that the access network device determines an attribute type of the terminal according to the target service carrier of the terminal and an actual service carrier of the terminal, and adjusts a bandwidth of the actual service carrier according to the attribute type of the terminal.
In this embodiment, the target access carrier is selected by using the selection module according to the theoretical signal-to-noise ratio, so that the target access carrier can be accessed, the access request is sent to the access network device by using the sending module, so that the access network device can determine the attribute type of the terminal according to the target service carrier of the terminal and the actual service carrier of the terminal, and adjust the bandwidth of the actual service carrier according to the attribute type of the terminal. And idle carrier resources can be fully utilized, so that the frequency spectrum utilization rate in the satellite communication system is improved. The method can improve the anti-interference capability of a satellite communication system, reduce the cost of a power amplifier of an accessed terminal, support equipment with different antenna apertures and reduce the influence of different signal coverage area differences while keeping higher frequency spectrum utilization rate.
It should be noted that, all the modules involved in this embodiment are logic modules, and in practical application, one logic unit may be one physical unit, may also be a part of one physical unit, and may also be implemented by a combination of multiple physical units. Also, the present invention is not limited to the specific configurations and processes described in the above embodiments and shown in the drawings. A detailed description of known methods is omitted herein for convenience and brevity of description. The specific working processes of the system, the module and the unit described above may refer to corresponding processes in the foregoing method embodiments, and are not described herein again.
Fig. 6 is a block diagram of an exemplary hardware architecture of a computing device capable of implementing the carrier adjustment method and apparatus according to the embodiments of the present application.
As shown in fig. 6, the electronic device 600 includes an input device 601, an input interface 602, a central processor 603, a memory 604, an output interface 605, and an output device 606. The input interface 602, the central processing unit 603, the memory 604, and the output interface 605 are connected to each other via a bus 607, and the input device 601 and the output device 606 are connected to the bus 607 via the input interface 602 and the output interface 605, respectively, and further connected to other components of the computing device 600.
In some embodiments, the input device 601 receives input information from the outside and transmits the input information to the central processor 603 through the input interface 602; the central processor 603 processes input information based on computer-executable instructions stored in the memory 604 to generate output information, stores the output information temporarily or permanently in the memory 604, and then transmits the output information to the output device 606 through the output interface 605; the output device 606 outputs the output information to the outside of the electronic device 600 for use by the user.
In one embodiment, the electronic device may be implemented as a network device that may include: a memory configured to store a program; a processor configured to execute the program stored in the memory to perform the carrier adjustment method described in the above embodiments.
The above description is only exemplary embodiments of the present application, and is not intended to limit the scope of the present application. In general, the various embodiments of the application may be implemented in hardware or special purpose circuits, software, logic or any combination thereof. For example, some aspects may be implemented in hardware, while other aspects may be implemented in firmware or software which may be executed by a controller, microprocessor or other computing device, although the application is not limited thereto.
Embodiments of the application may be implemented by a data processor of a mobile device executing computer program instructions, for example in a processor entity, or by hardware, or by a combination of software and hardware. The computer program instructions may be assembly instructions, Instruction Set Architecture (ISA) instructions, machine related instructions, microcode, firmware instructions, state setting data, or source code or object code written in any combination of one or more programming languages.
Any logic flow block diagrams in the figures of this application may represent program steps, or may represent interconnected logic circuits, modules, and functions, or may represent a combination of program steps and logic circuits, modules, and functions. The computer program may be stored on a memory. The memory may be of any type suitable to the local technical environment and may be implemented using any suitable data storage technology, such as, but not limited to, Read Only Memory (ROM), Random Access Memory (RAM), optical storage devices and systems (digital versatile disks, DVDs, or CD discs), etc. The computer readable medium may include a non-transitory storage medium. The data processor may be of any type suitable to the local technical environment, such as but not limited to general purpose computers, special purpose computers, microprocessors, Digital Signal Processors (DSPs), Application Specific Integrated Circuits (ASICs), programmable logic devices (FGPAs), and processors based on a multi-core processor architecture.
The foregoing has provided by way of exemplary and non-limiting examples a detailed description of exemplary embodiments of the present application. Various modifications and adaptations to the foregoing embodiments may become apparent to those skilled in the relevant arts in view of the following drawings and the appended claims without departing from the scope of the invention. Therefore, the proper scope of the invention is to be determined according to the claims.
Claims (14)
1. A method for carrier adjustment, the method comprising:
determining a target service carrier of a terminal according to a real-time signal-to-noise ratio of the terminal, wherein the target service carrier is a carrier expected to be used by the terminal;
determining the attribute type of the terminal according to the target service carrier and an actual service carrier of the terminal, wherein the actual service carrier is a carrier actually used by the terminal;
and adjusting the bandwidth of the actual service carrier according to the attribute type of the terminal.
2. The method according to claim 1, wherein the determining the attribute class of the terminal according to the target serving carrier and an actual serving carrier of the terminal comprises:
when the target service carrier is inconsistent with the actual service carrier, counting the service demand of the terminal;
and determining the attribute type of the terminal according to the service demand of the terminal, the target service carrier and the actual service carrier.
3. The method according to claim 2, wherein the determining the attribute class of the terminal according to the traffic demand of the terminal, the target serving carrier and the actual serving carrier comprises:
when the bandwidth of a target service carrier of the terminal is determined to be smaller than the bandwidth of an actual service carrier of the terminal, and the service demand of the terminal is less than or equal to a preset service demand threshold, determining that the attribute class of the terminal is a first attribute class;
and when the bandwidth of the target service carrier of the terminal is determined to be larger than the bandwidth of the actual service carrier of the terminal and the service demand of the terminal is determined to be larger than the preset service demand threshold, determining that the attribute class of the terminal is a second attribute class.
4. The method of claim 3, wherein the adjusting the bandwidth of the actual serving carrier according to the attribute class of the terminal comprises:
when the attribute class of the terminal is a first attribute class, counting the number of carriers needing bandwidth splitting to obtain the number of the first class of carriers;
adjusting the bandwidth of the actual service carrier according to the number of the first type of carrier; alternatively, the first and second electrodes may be,
when the attribute type of the terminal is a second attribute type, counting the number of carriers needing bandwidth combination to obtain the number of the second type of carriers;
and adjusting the bandwidth of the actual service carrier according to the number of the second type of carrier.
5. The method according to claim 1, wherein after the step of adjusting the bandwidth of the actual serving carrier according to the attribute class of the terminal, the method further comprises:
and if the bandwidth of the adjusted actual service carrier is determined to be smaller than the service requirement bandwidth of the terminal, switching the terminal from the actual service carrier to the target service carrier to work.
6. The method of claim 1, wherein before the step of determining the target serving carrier of the terminal according to the real-time signal-to-noise ratio of the terminal, the method further comprises:
counting load information of each working carrier, wherein the working carrier is obtained by dividing a baseband bandwidth;
determining an initial access signal-to-noise ratio of the terminal according to a received access request sent by the terminal;
and determining an initial target service carrier according to the initial access signal-to-noise ratio and the load information of each working carrier.
7. The method of claim 1, wherein before the step of determining the target serving carrier of the terminal according to the real-time signal-to-noise ratio of the terminal, the method further comprises:
periodically measuring a real-time signal-to-noise ratio of the terminal.
8. A method for carrier adjustment, the method comprising:
selecting a target access carrier according to a theoretical signal-to-noise ratio, wherein the theoretical signal-to-noise ratio is a theoretical value of the signal-to-noise ratio when a signal sent by a terminal reaches access network equipment;
and sending an access request to the access network equipment through the target access carrier, so that the access network equipment determines the attribute type of the terminal according to the target service carrier of the terminal and the actual service carrier of the terminal, and adjusts the bandwidth of the actual service carrier according to the attribute type of the terminal.
9. The method of claim 8, wherein before the step of selecting the target access carrier according to the theoretical snr, further comprising:
and estimating and obtaining the theoretical signal-to-noise ratio according to the specification of the power amplifier, the antenna aperture gain, the equivalent omnidirectional radiation power information of the area, the reverse carrier information and the performance index.
10. The method of claim 9, wherein the reverse carrier information comprises any one of carrier bandwidth and carrier frequency band information.
11. An apparatus for carrier adjustment, the apparatus comprising:
a target service carrier determining module, configured to determine a target service carrier of a terminal according to a real-time signal-to-noise ratio of the terminal, where the target service carrier is a carrier that the terminal expects to use;
a classification module, configured to determine an attribute class of the terminal according to the target serving carrier and an actual serving carrier of the terminal, where the actual serving carrier is a carrier actually used by the terminal;
and the adjusting module is used for adjusting the bandwidth of the actual service carrier according to the attribute type of the terminal.
12. A terminal, characterized in that the terminal comprises:
the selection module is used for selecting a target access carrier according to a theoretical signal-to-noise ratio, wherein the theoretical signal-to-noise ratio is a theoretical value of the signal-to-noise ratio when a signal sent by a terminal reaches access network equipment;
a sending module, configured to send an access request to the access network device through the target access carrier, so that the access network device determines an attribute category of the terminal according to a target service carrier of the terminal and an actual service carrier of the terminal, and adjusts a bandwidth of the actual service carrier according to the attribute category of the terminal.
13. A network device, comprising:
one or more processors;
memory having one or more programs stored thereon that, when executed by the one or more processors, cause the one or more processors to implement the method of any of claims 1-7, or the method of any of claims 8-10.
14. A storage medium, characterized in that the storage medium stores a computer program which, when executed by a processor, implements the method of any one of claims 1-7, or the method of any one of claims 8-10.
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| CN202010529570.5A CN113810093A (en) | 2020-06-11 | 2020-06-11 | Carrier wave adjusting method, device, terminal, network equipment and storage medium |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114422013A (en) * | 2021-12-23 | 2022-04-29 | 中国人民解放军63921部队 | Self-adaptive anti-interference satellite communication method, device, system and equipment |
| CN114640384A (en) * | 2022-01-29 | 2022-06-17 | 中国空间技术研究院 | High-flux satellite carrier wave distribution method based on terminal type spectral clustering |
-
2020
- 2020-06-11 CN CN202010529570.5A patent/CN113810093A/en active Pending
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114422013A (en) * | 2021-12-23 | 2022-04-29 | 中国人民解放军63921部队 | Self-adaptive anti-interference satellite communication method, device, system and equipment |
| CN114422013B (en) * | 2021-12-23 | 2023-12-08 | 中国人民解放军63921部队 | Self-adaptive anti-interference satellite communication method, device, system and equipment |
| CN114640384A (en) * | 2022-01-29 | 2022-06-17 | 中国空间技术研究院 | High-flux satellite carrier wave distribution method based on terminal type spectral clustering |
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