CN117014055A

CN117014055A - Channel capacity determining method and related equipment

Info

Publication number: CN117014055A
Application number: CN202210467502.XA
Authority: CN
Inventors: 郑昆朋; 赵永利; 李�浩
Original assignee: Huawei Technologies Co Ltd
Current assignee: Huawei Technologies Co Ltd
Priority date: 2022-04-29
Filing date: 2022-04-29
Publication date: 2023-11-07

Abstract

The embodiment of the application discloses a method for determining channel capacity and related equipment, wherein the method comprises the following steps: acquiring an available time period of a first satellite-to-ground link formed between a first satellite and a first gateway station; and determining the first channel capacity of the first satellite-to-ground link in the target time period according to the minimum actual channel capacity of the first satellite-to-ground link in the target time period, wherein the target time period belongs to the time period in the available time period, the length of the target time period is smaller than that of the available time period, the actual channel capacity of the first satellite-to-ground link is inversely related to the communication distance between the first satellite and the first gateway station, and the first channel capacity represents the channel capacity corresponding to each moment in the target time period. Since the minimum actual channel capacity in the target time period is larger than the minimum actual channel capacity in the whole connection time period, the utilization rate of channel resources between the satellite and the gateway station is improved.

Description

Channel capacity determining method and related equipment

Technical Field

The present application relates to the field of satellite communications technologies, and in particular, to a method for determining channel capacity and related devices.

Background

With the rapid development of satellite communication technology, research on large-scale satellite networking is increasingly in progress in countries around the world, and satellite networks have global visibility and bandwidth allocation capability, can bear services such as voice, data and other video services, and are an essential component of future sky-ground integrated information platforms.

The satellite network performs information interaction with the ground, and is mainly realized by virtue of a satellite-ground link between a satellite and a gateway station on the ground, wherein microwaves are adopted in the satellite-ground link for data transmission. Because of the relative motion between the low orbit satellite (low earth orbit satellite, LEO) and the medium orbit satellite (medium earth orbit satellite, MEO) and the gateway station on the ground, the gateway station to which the same satellite is connected may be handed off, and the distance between the satellite and the gateway station may continuously change during the connection of the same satellite to the same gateway station.

The longer the signal transmission distance is, the more attenuation the microwave signal is, and the lower the signal-to-noise ratio of the microwave signal is, and the channel capacity between the satellite and the gateway station is dynamically changed because the transmitting power of the microwave signal cannot be adaptively adjusted on the satellite to maintain a constant signal-to-noise ratio.

Currently, a fixed channel capacity is generally used between the satellite and the gateway station as a reference basis for service provision, and the fixed channel capacity is generally the minimum value in the dynamically changing channel capacity, which greatly wastes channel resources between the satellite and the gateway station.

Disclosure of Invention

The embodiment of the application provides a method for determining channel capacity and related equipment, which are beneficial to improving the utilization rate of channel resources between a satellite and a gateway station compared with the method for directly determining the minimum actual channel capacity in the whole connection time period of the first satellite and the first gateway station as the fixed channel capacity adopted in the available time period and determining the minimum actual channel capacity in the target time period as the fixed channel capacity adopted in the target time period.

In order to solve the technical problems, the embodiment of the application provides the following technical scheme:

in a first aspect, an embodiment of the present application provides a method for determining a channel capacity, where the method is applied to a first network device, where the first network device may be integrated on another satellite of a satellite network where the first satellite is located, or may be a network device on the ground, and the method may include: the method comprises the steps that first network equipment obtains an available time period of a first satellite-to-ground link formed between a first satellite and a first gateway station; the available time period of the first satellite-to-ground link may include the entire available time period from the establishment of the first satellite-to-ground link to the disconnection, or may be the remaining available time period of the first satellite-to-ground link starting from the current time.

The first network device determines a first channel capacity of the first satellite-to-ground link in a target time period according to the minimum actual channel capacity of the first satellite-to-ground link in the target time period, wherein the target time period belongs to a time period in an available time period, the length of the target time period is smaller than that of the available time period, the actual channel capacity of the first satellite-to-ground link and a target distance are in negative correlation, the target distance is a communication distance between a first satellite and a first gateway station, and the first channel capacity represents a channel capacity corresponding to each moment in the target time period.

In this implementation manner, the actual channel capacity between the first satellite and the first gateway station is changed in real time according to the change of the communication distance between the first satellite and the first gateway station, and since the target time period is included in the available time period and has a length smaller than that of the available time period, the maximum probability of the minimum actual channel capacity in the target time period is smaller than that of the minimum actual channel capacity in the whole connection time period, and compared with the method that the minimum actual channel capacity in the whole connection time period of the first satellite and the first gateway station is directly determined as the fixed channel capacity adopted in the available time period, the method that the minimum actual channel capacity in the target time period is determined as the fixed channel capacity adopted in the target time period is beneficial to improving the utilization rate of the channel resources between the satellite and the gateway station.

In one possible implementation manner of the first aspect, the method further includes: the method comprises the steps that first network equipment obtains at least one target segmentation point corresponding to an available time period, wherein the target segmentation point can be a segmentation point in the available time period; alternatively, the at least one target cut point may be a cut point of a first curve that is a curve of the actual channel capacity of the first satellite-to-ground link over the available period of time. At least one cut point corresponds to a start point and/or an end point of the target time period, and the determining factors of the at least one cut point include: the communication duration required by at least one static service provided by the first satellite is required, the static service is a communication service of which the source node, the sink node, the required communication duration and the occupied network bandwidth are known before transmitting data of the static service, and the network bandwidth represents the data quantity transmitted in unit time.

In the implementation manner, because the static service is a communication service with known required communication duration, at least one target dividing point corresponding to the available time period is determined based on the communication duration required by at least one static service provided by the first satellite, which is beneficial to improving the probability of successfully completing the static service, thereby being beneficial to further improving the utilization rate of channel resources of the satellite-to-ground link.

In one possible implementation manner of the first aspect, the method further includes: the method comprises the steps that first network equipment obtains communication duration required by a first static service, wherein the first static service is communication service with the longest communication duration required by a static service set, the minimum actual channel capacity of a first satellite-to-ground link in an available time period is second channel capacity, and the static service set corresponds to channel capacity except the second channel capacity in the actual channel capacity of the first satellite-to-ground link; further, the static service combination may include a plurality of second static services that need to be provided by the first satellite, where data of the plurality of second static services is transmitted through channel resources corresponding to a third channel capacity (i.e., a channel capacity other than the second channel capacity in the actual channel capacity of the first satellite-to-ground link). The first network device obtains at least one segmentation point corresponding to an available time period, including: the first network device determines at least one segmentation point corresponding to the available time period according to the communication duration required by the first static service, wherein each target time period pointed by the at least one segmentation point is greater than or equal to the communication duration required by the first static service.

In this implementation manner, since the data of the static service set is transmitted by using the channel resource corresponding to the channel capacity other than the minimum actual channel capacity in the available time period, a plurality of static services in the static service set may be allocated to different target time periods, that is, the first static service may be allocated to any one target time period, where each target time period is greater than or equal to the communication duration required by the first static service, and each target time period is greater than or equal to the communication duration required by any one static service in the static service set, which is beneficial to improving the probability of successful completion of the static service in the target time period.

In one possible implementation manner of the first aspect, the method further includes: the second network device determines a target inter-satellite link and a second satellite-ground link adopted by the communication service provided by the first satellite from a satellite network where the first satellite is located, wherein the target inter-satellite link and the second satellite-ground link are determined based on the first evaluation parameter and the second evaluation parameter. The second network device and the first network device may be the same device or different devices. Further, the second network device and the first network device may both be integrated in the same satellite; or the first network equipment is integrated in the satellite, and the second network equipment is network equipment on the ground; alternatively, the first network device and the second network device are both integrated in a network device on the ground.

The first evaluation parameter comprises an evaluation parameter of an inter-satellite link in a satellite network where the first satellite is located, and the determining factor of the first evaluation parameter comprises any one or more of the following: the current residual network bandwidth of the inter-satellite link, the time delay of the inter-satellite link or the total channel capacity of the inter-satellite link, the second evaluation parameter comprises an evaluation parameter of a satellite-to-ground link in a satellite network where the first satellite is located, and the determining factor of the second evaluation parameter comprises any one or more of the following: the current remaining network bandwidth of the satellite-to-ground link, the time delay of the satellite-to-ground link, or the first channel capacity of the satellite-to-ground link, the network bandwidth representing the amount of data transmitted per unit time.

In the implementation manner, the relative positions of different satellites in the satellite network are stable, so that the total channel capacity of the inter-satellite links is stable, and the connection condition of the inter-satellite links is stable; and because of the relative movement between the satellite and the gateway station, the actual channel capacity of the satellite-ground link is in a state of constantly changing, and the determination factors considered by the evaluation parameters of the inter-satellite link and the satellite-ground link are different, compared with the method for evaluating the inter-satellite link and the satellite-ground link by adopting a unified formula, the accuracy of the first evaluation parameter and the second evaluation parameter is improved, and therefore, a more proper data transmission path is selected.

In a possible implementation manner of the first aspect, the determining factor of the second evaluation parameter further includes a remaining available duration of the satellite-to-ground link. In the implementation manner, because of the relative movement between the satellite and the gateway station, the satellite-ground link has the characteristic of dynamic change, and the factor of the residual available time length is introduced into the evaluation factors of the satellite-ground link, the stability of the satellite-ground link can be reflected, and the accuracy of the second evaluation parameter can be further improved.

In a possible implementation manner of the first aspect, before the second network device determines the target inter-satellite link and the second satellite-to-ground link used by the communication service provided by the first satellite, the method further includes: the second network device obtains update parameters corresponding to a satellite network where the first satellite is located, wherein the update parameters include: and the first updating parameters are used for updating the first evaluation parameters of the inter-satellite links and/or the second updating parameters are used for updating the second evaluation parameters of the satellite-to-ground links, the determining factors of the first updating parameters comprise the congestion degree of the inter-satellite links, and the determining factors of the second updating parameters comprise the congestion degree of the satellite-to-ground links. The congestion level of the inter-satellite link/satellite-to-ground link may be determined based on any one or more of the following: congestion rate, traffic data transmission delay, or other metrics, etc. The second network device determining a target inter-satellite link and a second satellite-to-ground link employed by the communication service provided by the first satellite, comprising: and the second network equipment determines a target inter-satellite link and a second satellite-ground link adopted by the communication service provided by the first satellite according to the updated first evaluation parameter and/or the updated second evaluation parameter.

In this implementation manner, after the evaluation parameters of the inter-satellite link and the satellite-ground link are obtained, the evaluation parameters of the inter-satellite link and/or the satellite-ground link may be adjusted according to the congestion degree of the inter-satellite link and/or the satellite-ground link, that is, the evaluation parameters of the link may be adjusted according to the current data transmission pressure of the link, so as to affect the finally selected data transmission path, which is favorable for selecting a suitable data transmission path, so as to improve the probability of successfully completing the communication task.

In a second aspect, an embodiment of the present application provides a device for determining a channel capacity, where the device for determining a channel capacity includes: the acquisition module is used for acquiring an available time period of a first satellite-to-ground link formed between a first satellite and a first gateway station; and the determining module is used for determining the first channel capacity of the first satellite-to-ground link in the target time period according to the minimum actual channel capacity of the first satellite-to-ground link in the target time period, wherein the target time period is included in the available time period, the length of the target time period is smaller than that of the available time period, the actual channel capacity of the first satellite-to-ground link and the target distance are in negative correlation, the target distance is the communication distance between the first satellite and the first gateway station, and the first channel capacity represents the channel capacity corresponding to each moment in the target time period.

In the second aspect of the present application, the determining device for channel capacity may be further configured to execute the steps executed by the first network device and the second network device in the first aspect and each possible implementation manner of the first aspect, and the specific implementation manner, meaning of nouns and beneficial effects of the steps in each possible implementation manner of the second aspect may refer to the first aspect, which is not repeated herein.

In a third aspect, an embodiment of the present application provides a computer program product, the computer program product comprising a program which, when run on a computer, causes the computer to perform the method for determining channel capacity according to the first aspect.

In a fourth aspect, an embodiment of the present application provides a computer readable storage medium, in which a computer program is stored, which when run on a computer, causes the computer to perform the method for determining channel capacity according to the first aspect.

In a fifth aspect, an embodiment of the present application provides a network device, including a processor, where the processor is interconnected with a memory by a line, and the processor invokes program code in the memory to perform the following steps: acquiring an available time period of a first satellite-to-ground link formed between a first satellite and a first gateway station; and determining the first channel capacity of the first satellite-to-ground link in the target time period according to the minimum actual channel capacity of the first satellite-to-ground link in the target time period, wherein the target time period is included in the available time period, the length of the target time period is smaller than that of the available time period, the actual channel capacity of the first satellite-to-ground link and the target distance are in negative correlation, the target distance is the communication distance between the first satellite and the first gateway station, and the first channel capacity represents the channel capacity corresponding to each moment in the target time period.

In the fifth aspect of the present application, the network device may be further configured to perform the steps performed by the first network device and the second network device in the first aspect and each possible implementation manner of the first aspect, and the specific implementation manner, meaning of nouns and beneficial effects of the steps in each possible implementation manner of the fifth aspect may refer to the first aspect, which is not described herein again.

Drawings

Fig. 1a is a schematic diagram of an application scenario of a method for determining channel capacity according to an embodiment of the present application;

fig. 1b is a schematic diagram of a relationship between an actual channel capacity and a communication distance reflected in a method for determining a channel capacity according to an embodiment of the present application;

fig. 2 is a schematic flow chart of a method for determining channel capacity according to an embodiment of the present application;

fig. 3 is a flow chart of a method for determining channel capacity according to an embodiment of the present application;

fig. 4 is a schematic diagram of an available time period, a target dividing point and a target time period in a method for determining channel capacity according to an embodiment of the present application;

fig. 5 is a schematic diagram of a first channel capacity in a target time period in a method for determining a channel capacity according to an embodiment of the present application;

Fig. 6 is a flow chart of a method for determining channel capacity according to an embodiment of the present application;

fig. 7 is a schematic diagram of an evaluation factor corresponding to the remaining available time length of a satellite-to-ground link in the method for determining channel capacity according to the embodiment of the present application;

fig. 8 is a schematic flow chart of determining a target inter-satellite link and a second satellite-to-ground link in the method for determining channel capacity according to the embodiment of the present application;

fig. 9 is a schematic structural diagram of a channel capacity determining apparatus according to an embodiment of the present application;

fig. 10 is a schematic structural diagram of a network device according to an embodiment of the present application.

Detailed Description

Embodiments of the present application are described below with reference to the accompanying drawings. As one of ordinary skill in the art can know, with the development of technology and the appearance of new scenes, the technical scheme provided by the embodiment of the application is also applicable to similar technical problems.

The terms first, second and the like in the description and in the claims and in the above-described figures, are used for distinguishing between similar elements and not necessarily for describing a particular sequential or chronological order. It is to be understood that the terms so used are interchangeable under appropriate circumstances and are merely illustrative of the manner in which embodiments of the application have been described in connection with the description of the objects having the same attributes. Furthermore, the terms "comprises," "comprising," and "having," and any variations thereof, are intended to cover a non-exclusive inclusion, such that a process, method, system, article, or apparatus that comprises a list of elements is not necessarily limited to those elements, but may include other elements not expressly listed or inherent to such process, method, article, or apparatus.

The method and the device can be applied to application scenes of data transmission by utilizing a satellite network. Specifically, since the movement period of a part of satellites in the satellite network (for example, low-orbit satellites and medium-orbit satellites in the satellite network) is different from the rotation period of the earth, that is, there is a relative movement between the part of satellites in the satellite network and the gateway station on the bottom surface, the distance between the satellite and the gateway station can be continuously changed in the process of connecting the same satellite with the same gateway station. The gateway station may also be referred to as a Ground Station (GS). In order to understand the present solution more intuitively, referring to fig. 1a, fig. 1a is a schematic diagram of an application scenario of a method for determining channel capacity according to an embodiment of the present application. In fig. 1a, a low-orbit satellite is taken as an example, and a satellite A1 and a gateway station A2 are established with a satellite-earth link at the time T1 and the time T2, but it is obvious that the communication distance between the satellite A1 and the gateway station A2 is longer than the communication distance at the time T2, and it should be understood that the example in fig. 1a is only for facilitating understanding of the present solution and is not limited to the present solution.

The skilled person has found in the study that there is a periodic variation in the communication distance between a satellite and a gateway station, and in particular that after a satellite-to-earth link is established between the same satellite and the same gateway station, the communication distance between the satellite and the gateway station may become smaller and larger until the satellite moves outside the visible range of the gateway station, due to the relative operation between the satellite and the gateway station, the satellite will establish a new satellite-to-earth link with the next gateway station.

The actual channel capacity of the satellite-to-ground link formed between the satellite and the gateway station may vary as the communication distance varies, and the actual channel capacity of the satellite-to-ground link may be inversely related to the communication distance. For a more intuitive understanding of the present solution, refer to fig. 1b, where fig. 1b is a schematic diagram of a relationship between an actual channel capacity and a communication distance reflected in a method for determining a channel capacity according to an embodiment of the present application. As shown in fig. 1b, the longer the communication distance between the satellite and the gateway station, the smaller the actual channel capacity of the satellite-to-earth link between the satellite and the gateway station, i.e. the smaller the amount of data that can be transmitted over the satellite-to-earth link per unit time, it should be understood that the example in fig. 1b is merely for convenience in understanding the present scheme and is not intended to limit the present scheme.

In order to improve the utilization rate of the channel resources between the satellite and the gateway station, the present application provides a method for determining the channel capacity, refer to fig. 2, and fig. 2 is a flow chart of a method for determining the channel capacity provided in the embodiment of the present application, and B1, a first network device obtains an available time period of a first satellite-to-ground link formed between a first satellite and a first gateway station. B2, the first network device determines the first channel capacity of the first satellite-ground link in the target time period according to the minimum actual channel capacity of the first satellite-ground link in the target time period, wherein the target time period belongs to the time period in the available time period, the length of the target time period is smaller than that of the available time period, the actual channel capacity of the first satellite-ground link and the target distance are in negative correlation, the target distance is the communication distance between the first satellite and the first gateway station, and the first channel capacity represents the channel capacity corresponding to each moment in the target time period.

In the embodiment of the application, since the target time period is included in the available time period and the length is smaller than the length of the available time period, the minimum actual channel capacity in the target time period is more probable to be smaller than the minimum actual channel capacity in the whole connection time period, and compared with the method for directly determining the minimum actual channel capacity in the whole connection time period of the first satellite and the first gateway station as the fixed channel capacity adopted in the available time period, the method for determining the minimum actual channel capacity in the target time period as the fixed channel capacity adopted in the target time period is beneficial to improving the utilization rate of the channel resources between the satellite and the gateway station.

With reference to the foregoing description, a specific implementation flow of the channel capacity determining method provided by the embodiment of the present application is described below with reference to fig. 3. Fig. 3 is a schematic flow chart of a method for determining channel capacity according to an embodiment of the present application, where the method for determining channel capacity according to the embodiment of the present application may include:

301. the first network equipment acquires the communication duration required by the first static service, wherein the first static service is the communication service with the longest communication duration required by the static service set, the minimum actual channel capacity of the first satellite-to-ground link in the available time period is the second channel capacity, and the static service set corresponds to the channel capacity beyond the second channel capacity in the actual channel capacity of the first satellite-to-ground link.

In some embodiments of the present application, the manner in which the first network device determines the target time period from the available time periods of the first satellite-to-ground link may include: the first network device determines at least one segmentation point corresponding to an available time segment of the first satellite-to-ground link to segment the available time segment into at least two target time segments by the at least one segmentation point.

Further, the first network device may determine the aforementioned at least one division point based on a communication duration required for the first static service, and the first network device needs to acquire the communication duration required for the first static service.

The first network device may be integrated on another satellite in the satellite network where the first satellite is located, and as an example, the first network device may be integrated on an access satellite in the satellite network where the first satellite is located; alternatively, the first network device may be a network device on the ground, which may be specifically determined in conjunction with an actual application scenario.

The first satellite may be any feeder satellite in a satellite network, and the first gateway station refers to a gateway station that establishes a satellite-to-ground link with the first satellite, where the "satellite-to-ground link" may also be referred to as a "Feeder Link (FL)".

The available time period of the first satellite-to-ground link may include the entire available time period from the establishment of the first satellite-to-ground link to the disconnection, or may be the remaining available time period of the first satellite-to-ground link starting from the current time.

The smallest actual channel capacity of the first satellite-to-ground link formed by the first satellite and the first gateway station in the available time period is the second channel capacity, as will be understood in connection with fig. 1a and 1b, i.e. the second channel capacity may be the actual channel capacity of the first satellite-to-ground link between the first satellite and the first gateway station when the first satellite-to-ground link is about to be disconnected, or the second channel capacity may be the actual channel capacity of the first satellite-to-ground link when the first satellite-to-ground link is just established.

The first static service is a communication service with the longest communication duration required in the static service set, and the static service set may include a plurality of second static services that need to be provided by the first satellite, where the plurality of second static services correspond to channel capacities (for convenience of description, hereinafter referred to as "third channel capacities") other than the second channel capacities in the actual channel capacities of the first satellite-to-ground link, that is, data of the plurality of second static services is transmitted through channel resources corresponding to the third channel capacities.

The first static service and the second static service are both static services, the static services are communication services of which the source node, the destination node, the communication duration and the occupied network bandwidth are known before transmitting data of the static services, and the network bandwidth represents the data quantity transmitted in unit time. As an example, the network bandwidth may be, for example, transmitting 2G data per second, transmitting 1.5G data per second, etc.; the source node, the destination node and the occupied bandwidth of the private line service are known and fixed through the private line service provided by the satellite network, and the communication duration is all the day; as another example, such as providing bursty temporary communication services through a satellite network, short-time instruction issuing services in a specific scenario, etc., the source node, the destination node, and the required bandwidth information of such services are known, the duration of the communication is for a short period of time, and the concept of "static services" is merely illustrated herein for convenience and is not intended to limit the present scheme.

Specifically, the first network device may acquire a communication service list corresponding to the first satellite, where the communication service list includes all communication services allocated to the first satellite; a plurality of second static services in the set of static services may be determined based on the communication services list. The first network equipment acquires the communication duration required by each static service in the static service set, and determines the communication duration required by the first static service, wherein the first static service is the communication service with the longest communication duration required by a plurality of second static services.

Further, in one implementation manner, the first network device may obtain a communication service list to be provided by the access satellite, and further determine, according to the destination node of each communication service, which services may be allocated to the first satellite, that is, obtain a communication service list corresponding to the first satellite.

In another implementation manner, if the first network device can obtain all the communication services provided by the entire satellite network, it may determine, according to the destination node of each communication service, which services may be allocated to the first satellite, that is, obtain a communication service list corresponding to the first satellite.

302. The first network device obtains an availability period of a first satellite-to-ground link formed between a first satellite and a first gateway station.

In the embodiment of the present application, the first network device needs to acquire the available time period of the first satellite-to-ground link formed between the first satellite and the first gateway station, and concepts of the first network device, the first satellite, the first gateway station and the available time period may be referred to the description in step 301, which is not repeated herein.

Specifically, if the first network device is integrated with the first satellite, the first network device (i.e., the first satellite) may directly acquire the available time period of the first satellite-to-ground link formed between the first satellite and the first gateway station. The embodiment of the present application does not limit the execution sequence of steps 301 and 302, and step 301 may be executed first, and then step 302 may be executed; step 302 may be performed first, and then step 301 may be performed; steps 301 and 302 may also be performed simultaneously.

303. The first network device obtains at least one target segmentation point corresponding to the available time period, the target segmentation point corresponds to the starting point and/or the ending point of the target time period, the target time period belongs to the time period within the available time period, and the length of the target time period is smaller than that of the available time period.

In some embodiments of the present application, the first network device may obtain at least one target cut point corresponding to the available time period, each target cut point corresponding to a start point and/or an end point of the target time period. The at least one target dividing point is used for dividing the available time period into a plurality of target time periods, namely, the target time period belongs to a time period within the available time period, the length of the target time period is smaller than that of the available time period, and the lengths of different target time periods can be the same or different.

Further, the above-mentioned target cut points may be cut points in the available time period, and then each target cut point may specifically be represented as an end point and/or a start point of the target time period; alternatively, the at least one target split point may be a split point of a first change curve, where the first change curve is a change curve of an actual channel capacity of the first satellite-to-ground link in an available time period, and since an ordinate of the first change curve is the actual channel capacity of the first satellite-to-ground link and an abscissa of the first change curve is a time in the available time period, the at least one target split point may also be regarded as corresponding to the available time period, and each split point corresponds to a start point and/or an end point of the target time period.

In order to more intuitively understand the present solution, referring to fig. 4, fig. 4 is a schematic diagram of an available time period, a target dividing point and a target time period in the method for determining a channel capacity according to an embodiment of the present application. Taking the available time period as the whole available time period of the first satellite-ground link as an example, two target division points are respectively shown in fig. 4, the whole available time period is from t3 to t9, the two target division points respectively correspond to two time points of t5 and t7 in the available time period, the two target division points divide the whole available time period into three target time periods of t3 to t5, t5 to t7 and t7 to t9, and the first target division point is the end point of the first target time period and is also the start point of the second target time period; the second target split point is the end of the second target period and is also the start of the third target period, and it should be understood that the example in fig. 4 is merely for convenience of understanding the present solution, and is not limited to the present solution.

The manner of determining the at least one target cut point. In one implementation, the determining factors of the at least one target cut point may include: the duration of the communication required for the at least one static service provided by the first satellite. Specifically, in one case, step 303 may include: the first network device may determine at least one target cut point corresponding to the available time period according to a communication duration required by the first static service; the concept of the first static service may refer to the description in step 301, where each target period pointed to by at least one target dividing point is greater than or equal to the communication duration required by the first static service.

As an example, for example, the available time period of the first satellite-to-ground link between the first satellite and the first gateway station is 150s, the communication duration of the first static service is 20s, if the available time period of the first satellite-to-ground link is divided by equal time duration, 1-6 dividing points corresponding to the available time period may be obtained to ensure that each target time period is greater than or equal to 20s, which is understood that the present solution is only for convenience in understanding and is not limited by this solution.

In the embodiment of the application, since the data corresponding to the static service set is transmitted by adopting the channel resource corresponding to the third channel capacity (i.e. the channel capacity outside the minimum actual channel capacity in the available time period), a plurality of static services in the static service set can be distributed to different target time periods, namely the first static service can be distributed to any one of the target time periods, and each target time period is greater than or equal to the communication duration required by the first static service, and each target time period is greater than or equal to the communication duration required by any one of the static services in the static service set, thereby being beneficial to improving the probability of successfully completing the static service in the target time period.

In another case, the first network device may also obtain third information corresponding to the static service set, where the third information is used to indicate an allocation situation of the static service set in different target time periods, that is, the static service set includes at least two static service subsets, each static service subset includes at least one static service, the different static service subsets are allocated to different target time periods, and each target time period indicated by the at least one target dividing point may be greater than or equal to a communication duration required by each static service in the static service subset.

In the embodiment of the application, because the static service is the communication service with known required communication duration, at least one target dividing point corresponding to the available time period is determined based on the communication duration required by at least one static service provided by the first satellite, which is beneficial to improving the probability of successfully completing the static service, thereby being beneficial to further improving the utilization rate of the channel resources of the satellite-to-ground link.

In another implementation, the at least one target cut point may correspond to any time point in the available time period, that is, the multiple target time periods are randomly allocated by the first network device to the available time period, and the first network device may also obtain the at least one target cut point corresponding to the available time period in other manners, which is not exhaustive herein.

304. The first network device determines a first channel capacity of the first satellite-to-ground link in a target time period according to the minimum actual channel capacity of the first satellite-to-ground link in the target time period, wherein the first channel capacity represents the channel capacity corresponding to each moment in the target time period, the actual channel capacity of the first satellite-to-ground link is inversely related to a target distance, and the target distance is a communication distance between the first satellite and the first gateway station.

In the embodiment of the application, the first network device acquires the minimum actual channel capacity of the first satellite-to-ground link in the target time period, and determines the first channel capacity of the first satellite-to-ground link in the target time period according to the minimum actual channel capacity of the first satellite-to-ground link in the target time period.

The first channel capacity represents the channel capacity corresponding to each moment in the target time period, that is, the fixed first channel capacity is adopted by the channel capacity corresponding to each moment in the target time period; the actual channel capacity of the first satellite-to-ground link is inversely related to the target distance, which is the communication distance between the first satellite and the first gateway station.

The process of acquiring the minimum actual channel capacity of the first satellite-to-ground link within the target time period is directed to the first network device. In one implementation, the first network device may obtain second information, where the second information is used to indicate an actual channel capacity of a first satellite-to-ground link formed between the first satellite and the first gateway station during the available time period, and the actual channel capacity of the first satellite-to-ground link during the available time period is inversely related to the target distance.

The second information may specifically be represented by the first change curve described above; alternatively, the second information may also include a plurality of values corresponding to a plurality of time points in the available time period in a one-to-one correspondence manner, where each value represents an actual channel capacity of the first satellite-to-ground link at a time point in the target time period, and the plurality of values included in the second information are used to indicate an actual channel capacity of the first satellite-to-ground link at a plurality of time points in the target time period, and the second information may also represent other types of data, which is not exhaustive herein.

In one case, if the second information is embodied in the first variation curve, the first network device obtains, before executing step 303, a first variation curve for indicating an actual channel capacity of the first satellite-to-ground link in the available time period; and then, obtaining at least one target segmentation point on the first change curve through step 303, wherein the at least one target segmentation point segments the first change curve into at least two second change curves. The first network device may obtain the minimum actual channel capacity in each second change curve, i.e. the minimum actual channel capacity of the first satellite-to-ground link in the target period of time, in step 304.

In order to more intuitively understand the present solution, referring to fig. 5, fig. 5 is a schematic diagram of a first channel capacity in a target time period in the method for determining a channel capacity according to an embodiment of the present application. As will be appreciated from fig. 5 in conjunction with fig. 4, the first change curve represents the actual channel capacity of the first satellite-to-ground link at each moment in the entire available time period, and the two target splitting points split the entire first change curve into three second change curves, and the minimum actual channel capacity in each target time period (i.e. the first channel capacity adopted by the target time period) is shown in the drawing, and the minimum actual channel capacity in the entire available time period of the first satellite-to-ground link is the actual channel capacities at the times t3 and t9, as can be seen from fig. 5, the utilization of the channel resources in the available time period can be improved by adopting the segmentation method relative to directly determining the minimum actual channel capacity in the entire available time period as the fixed channel capacity adopted in the entire available time period, and it should be understood that the example in fig. 5 is only for facilitating understanding the scheme and is not used for limiting the scheme.

In another case, if the second information includes a plurality of values corresponding to a plurality of time points in the available time period in a one-to-one manner, the first network device may segment the available time period based on at least one target segmentation point in step 303, to obtain at least two target time periods; the first network device obtains the minimum actual channel capacity in each target time period according to the second information.

In another implementation manner, the first network device may also segment the available time period based on at least one target segmentation point in step 303 to obtain at least two target time periods, and then obtain the actual channel capacity of the first satellite-to-ground link in each target time period, so as to obtain the minimum actual channel capacity in each target time period.

In order to more intuitively understand the present solution, please refer to fig. 6, fig. 6 is a flow chart of a method for determining channel capacity according to an embodiment of the present application. As shown in fig. 6, a schematic diagram of the current connection relationship of the satellite network is shown in sub-schematic diagram 1 of fig. 6, and the current connection relationship of the satellite network may be stored in the access satellite. In the sub-schematic diagram of fig. 6, an access satellite may acquire a communication service list that needs to be provided by the access satellite, where the communication service list includes a plurality of communication services, and a source node, a sink node, and a communication duration of each communication service are known; the access satellite may acquire communication traffic with the sink node as the first gateway station and determine that communication traffic for data transfer over the satellite-to-earth link between the first satellite and the first gateway station (i.e., the first satellite-to-earth link represented by C1) is required.

In the 3 sub-schematic diagram of fig. 6, the access satellite may obtain the available duration of the first satellite-to-ground link represented by C1, and obtain the first channel capacity of the first satellite-to-ground link represented by C1 in the target period, and the specific implementation steps may refer to the descriptions in steps 301 to 304 above. The access satellite may then determine which communication traffic data to send to the first satellite in each target time period based on the first channel capacity of the first satellite-to-ground link in each target time period, and it should be understood that the example in fig. 6 is merely for convenience in understanding the present solution, and is not intended to limit the present solution.

305. The second network equipment acquires a first evaluation parameter and a second evaluation parameter, wherein the first evaluation parameter comprises an evaluation parameter of an inter-satellite link in a satellite network where the first satellite is located, and the second evaluation parameter comprises an evaluation parameter of an inter-satellite link in the satellite network where the first satellite is located.

In some embodiments of the present application, the second network device may acquire fourth information corresponding to the satellite network where the first satellite is located, where the fourth information may include a connection relationship between satellites in the satellite network where the first satellite is located and a gateway station, that is, a plurality of inter-satellite links (ISL) and satellite-to-earth links included in the satellite network where the first satellite is located are determined. The second network equipment acquires first evaluation parameters and second evaluation parameters, wherein the first evaluation parameters comprise evaluation parameters of a plurality of inter-satellite links in a satellite network where the first satellite is located, and the second evaluation parameters comprise evaluation parameters of a plurality of satellite-to-ground links in the satellite network where the first satellite is located.

The second network device and the first network device may be the same device or different devices. Further, the second network device and the first network device may both be integrated in the same satellite; or the first network equipment is integrated in the satellite, and the second network equipment is network equipment on the ground; alternatively, the first network device and the second network device are both integrated in a network device on the ground.

The first evaluation parameter may specifically be represented as a score value, where the higher the score value of a certain inter-satellite link is, the more likely the inter-satellite link is selected, or the lower the score value of a certain inter-satellite link is, the more likely the inter-satellite link is selected; the first evaluation parameter may also be represented as an evaluation level, and the higher the score value of a certain inter-satellite link, the more likely the inter-satellite link is selected, and other types of evaluation parameters may be adopted, which is not meant to be exhaustive.

The determining factors of the first evaluation parameters of each inter-satellite link include any one or more of the following: the current remaining network bandwidth of the inter-satellite links, the time delay of the inter-satellite links, the total channel capacity of the inter-satellite links, or other factors, etc., are not intended to be exhaustive.

The wider the current remaining network bandwidth of the inter-satellite link, the greater the probability that the inter-satellite link is selected; the greater the total channel capacity of an inter-satellite link, the greater the probability that the inter-satellite link is selected; the longer the delay of an inter-satellite link, the less probability that the inter-satellite link is selected.

Further, the current remaining network bandwidth of a certain inter-satellite link refers to the amount of data that can be transmitted per unit time by a transmission signal that has not been used by the inter-satellite link. Channel capacity refers to the maximum data transmission capacity of the inter-satellite link under certain signal-to-noise conditions.

Optionally, if the score value of a certain inter-satellite link is higher, the more likely the inter-satellite link is selected, the first evaluation parameter of the certain inter-satellite link may be proportional to the current remaining network bandwidth of the inter-satellite link and the total channel capacity of the inter-satellite link, inversely proportional to the time delay of the inter-satellite link, and for further understanding of the present solution, an example of a calculation formula of the first evaluation parameter is disclosed below:

wherein W is _si A first evaluation parameter representing any one of the inter-satellite links (hereinafter referred to as the first inter-satellite link for convenience of description) in the satellite network where the first satellite is located, B _sc Representing the current remaining network bandwidth of the first inter-satellite link, B _sp Representing the total channel capacity of the first inter-satellite link, T _sd Representing the time delay of the first inter-satellite link, T _t Representing the time delay of the longest inter-satellite link in the satellite network where the first satellite is located, it should be understood that the example in equation (1) is merely for convenience in understanding the present solution, and is not intended to limit the present solution.

The second evaluation parameter may specifically be represented as a score value, where the higher the score value of a certain satellite-to-ground link is, the more likely the satellite-to-ground link is selected, or the lower the score value of a certain satellite-to-ground link is, the more likely the satellite-to-ground link is selected; the second evaluation parameter may also be represented as an evaluation level, and the higher the score value of a certain satellite-to-ground link, the more likely the satellite-to-ground link is selected, etc., and other types of evaluation parameters may be used, which are not intended to be exhaustive.

The determining factors of the second evaluation parameters of each satellite-ground link include any one or more of the following: the current remaining network bandwidth of the satellite-to-ground link, the latency of the satellite-to-ground link, the first channel capacity of the satellite-to-ground link, or other factors, etc., are not intended to be exhaustive.

The wider the current remaining network bandwidth of the satellite-to-ground link, the greater the likelihood that the satellite-to-ground link is selected, the greater the first channel capacity of the satellite-to-ground link, the greater the likelihood that the satellite-to-ground link is selected; the longer the delay of a satellite-to-ground link, the less likely that the satellite-to-ground link will be selected.

Optionally, the determining factor of the second evaluation parameter of each satellite-to-ground link may further include a remaining available duration of the satellite-to-ground link; the longer the remaining time available for a particular satellite-to-ground link, the greater the likelihood that the satellite-to-ground link will be selected.

Alternatively, if a given satellite link has a higher score, the more likely that satellite link is selected, the second evaluation parameter for that satellite link may be proportional to the current remaining network bandwidth of the satellite link, the total channel capacity of the satellite link, and the available time length of the satellite link, and inversely proportional to the time delay of the satellite link.

Further, in the formula for generating the second evaluation parameter, there may be an evaluation factor corresponding to the remaining available time length of the satellite-to-ground link, where the value range of the evaluation factor may be 0 to 1, and the larger the value of the evaluation factor, the longer the remaining available time length of the satellite-to-ground link is represented.

To further understand the present solution, one example of a calculation formula for the second evaluation parameter is disclosed below:

wherein W is _sg A second evaluation parameter representing any one of the satellite-to-earth links (hereinafter referred to as a third satellite-to-earth link for convenience of description) in the satellite network where the first satellite is located, B _c Representing the current residual bandwidth of the third satellite-to-ground link, B _p Representing the first channel capacity, T, of the third satellite-to-ground link _p Representing an evaluation factor corresponding to the remaining available time length of the third satellite-to-ground link, T _d Representing the time delay of the third satellite-ground link, it should be understood that the example in equation (2) is merely to facilitate understanding of the present scheme, and is not intended to limit the present scheme.

In order to more intuitively understand the present solution, referring to fig. 7, fig. 7 is a schematic diagram of an evaluation factor corresponding to the remaining available time length of the satellite-to-ground link in the method for determining channel capacity according to the embodiment of the present application. In FIG. 7, three trajectories of the satellite with respect to the gateway station are shown, where the satellite's trajectory passes through the diameter of the visible range of the gateway station and the satellite has just entered the visible range of the gateway station, the satellite has the longest remaining usable time with the gateway station, T _p The value of (2) may be 1; if the remaining available time length of the satellite and the gateway station is 0, T _p The value of (2) may be 0. Referring to FIG. 7, it can be seen that when a satellite and a gateway station just establish a communication connection, the evaluation factor corresponding to the remaining available time period of the satellite-to-ground link is not necessarily 1, for example, T in FIG. 7 if the satellite moves along the path _p The track where the value of 0.5 is locatedIf the channel is, the maximum value of the evaluation factor corresponding to the remaining available duration of the satellite-ground link established by the satellite and the gateway station is only 0.5, it should be understood that the example in fig. 7 is only for facilitating understanding the concept of the evaluation factor corresponding to the remaining available duration, and is not limited to this scheme.

306. The second network device obtains updated parameters corresponding to the satellite network where the first satellite is located.

In some embodiments of the present application, the second network device may further obtain an update parameter corresponding to a satellite network where the first satellite is located, where the update parameter corresponding to the satellite network where the first satellite is located may include: a first update parameter for updating a first evaluation parameter of the inter-satellite link and/or a second update parameter for updating a second evaluation parameter of the satellite-to-ground link; and updating the first evaluation parameter and/or the second evaluation parameter based on the update parameter.

Wherein the determining factor of the first updating parameter comprises the congestion degree of the inter-satellite link, and the determining factor of the second updating parameter comprises the congestion degree of the satellite-ground link. Both the first update parameter and the second update parameter may be represented as numerical values, the less likely an inter-satellite link is selected, and correspondingly the less likely an earth-satellite link is selected.

Further, the congestion level of an inter-satellite link may be determined based on any one or more of the following: congestion rate of the inter-satellite link, service data transmission delay of the inter-satellite link or other indexes, etc.; correspondingly, the congestion level of one satellite-to-ground link may be determined based on any one or more of the following: the congestion rate of the satellite-to-ground link, the traffic data transmission delay of the satellite-to-ground link, or other metrics, etc., are not intended to be exhaustive.

Further, different inter-satellite links may employ the same or different first update parameters, and corresponding different satellite-ground links may employ the same or different second update parameters, which are not limited herein.

307. The second network device determines a target inter-satellite link and a second satellite-to-ground link used by the communication service provided by the first satellite from a satellite network in which the first satellite is located.

In the embodiment of the present application, step 306 is an optional step, if step 306 is not executed, in step 307, after determining the destination node of the current communication service provided by the first satellite, the second network device may determine, from the satellite network in which the first satellite is located, a target inter-satellite link and a second inter-satellite link adopted by the current communication service provided by the first satellite according to a plurality of first evaluation parameters and a plurality of second evaluation parameters corresponding to the satellite network in which the first satellite is located; that is, it is determined which target inter-satellite links and which second satellite links are employed to transmit data of the current communication traffic from the first satellite to the sink node to which the current communication traffic corresponds.

If step 306 is executed, the second network device may determine, according to the plurality of updated first evaluation parameters and the plurality of updated second evaluation parameters, or according to the plurality of updated first evaluation parameters and the plurality of second evaluation parameters, or according to the plurality of first evaluation parameters and the plurality of updated second evaluation parameters, a target inter-satellite link and a second inter-satellite link used by the current communication service provided by the first satellite from the satellite network where the first satellite is located.

Specifically, after determining the destination node of the current communication service provided by the first satellite, the second network device may determine at least one transmission path corresponding to the current communication service from the satellite network where the first satellite is located, where each transmission path includes at least one inter-satellite link and at least one satellite-to-ground link.

For any one transmission path (hereinafter referred to as a "target transmission path" for convenience of description) of at least one transmission path, in one manner, the second network device may calculate an average value of first evaluation parameters (may also be updated first evaluation parameters) corresponding to all inter-satellite links in the target transmission path, and obtain a second evaluation parameter (may also be updated second evaluation parameters) corresponding to one satellite-to-ground link in the target transmission path, and calculate a sum between the average value and the second evaluation parameter (may also be updated second evaluation parameters) to obtain an evaluation parameter corresponding to the target transmission path.

For further understanding of the present solution, an example of a calculation formula of an evaluation parameter corresponding to a target transmission path is disclosed below:

wherein X is _si Representing a first updated parameter corresponding to the ith inter-satellite link in the target transmission path, B _sc Representing the current remaining network bandwidth of the inter-satellite link in the target transmission path, B _sp Representing the total channel capacity, T, of the inter-satellite links in the target transmission path _sd Representing the delay of the inter-satellite link in the target transmission path, T _t Representing the time delay of the longest inter-satellite link in the satellite network where the first satellite is located, H represents the number of inter-satellite links included in the target transmission path, X _sg Representing a second updated parameter corresponding to the satellite-to-ground link in the target transmission path, B _c Representing the current residual bandwidth of the satellite-to-ground link in the target transmission path, B _p Representing a first channel capacity, T, of a satellite-to-ground link in a target transmission path _p Representing an evaluation factor corresponding to the remaining available time length of the satellite-to-ground link in the target transmission path, T _d Representing the time delay of the satellite-to-ground link in the target transmission path, it should be understood that the example in equation (3) is merely for ease of understanding the present scheme and is not intended to limit the present scheme.

In another manner, the second network device may calculate a sum of first evaluation parameters (or updated first evaluation parameters) corresponding to all inter-satellite links in the target transmission path, obtain a second evaluation parameter (or updated second evaluation parameters) corresponding to one inter-satellite link in the target transmission path, calculate a sum between the sum of all inter-satellite links and the second evaluation parameter (or updated second evaluation parameters), and obtain an evaluation parameter corresponding to the target transmission path. The second network device may also calculate the evaluation parameter corresponding to each target transmission path in other manners, which is not exhaustive herein.

The second network device calculates the evaluation parameter corresponding to each transmission path in at least one transmission path in the above manner, so as to determine the transmission path adopted by the current communication service.

Specifically, if the larger the first evaluation parameter is, the higher the probability that the corresponding inter-satellite link is selected is, and the larger the second evaluation parameter is, the higher the probability that the corresponding inter-satellite link is selected is, the second network device may determine, as the transmission path adopted by the current communication service, the transmission path with the largest evaluation parameter in the at least one transmission path.

If the smaller the first evaluation parameter is, the higher the probability that the corresponding inter-satellite link is selected is, and the smaller the second evaluation parameter is, the higher the probability that the corresponding inter-satellite link is selected is, one transmission path with the smallest evaluation parameter in at least one transmission path can be determined as the transmission path adopted by the current communication service, and the transmission path can be determined specifically in combination with the actual application scenario.

In order to more intuitively understand the present solution, referring to fig. 8, fig. 8 is a schematic flow chart of determining a target inter-satellite link and a second inter-satellite link in the method for determining channel capacity according to the embodiment of the present application. As shown in fig. 8, the sub-schematic diagram 1 of fig. 8 can be referred to the above description of fig. 6, and will not be repeated here.

In the sub-schematic diagram of fig. 8, the access satellite may generate a plurality of first evaluation parameters corresponding to a plurality of inter-satellite links in the satellite network one by one, and a plurality of second evaluation parameters corresponding to a plurality of inter-satellite links in the satellite network one by one, so as to obtain a matrix formed by the plurality of first evaluation parameters and a matrix formed by the plurality of second evaluation parameters.

In the sub-schematic diagram of fig. 8, after determining that the sink node is a communication service of the first gateway station, the access satellite may generate a first update parameter and/or a second update parameter based on the congestion degree of the link in the satellite network, and update the first evaluation parameter and/or the second evaluation parameter.

In fig. 8, the access satellite determines two data transmission paths reaching the first gateway station according to the evaluation parameters of the link obtained in fig. 3, and selects the data transmission path adopted by the current communication service, that is, determines a plurality of inter-satellite links and a satellite-to-ground link adopted by the current communication service, which should be understood that the example in fig. 8 is only for convenience of understanding the present scheme and is not limited to the present scheme.

In the embodiment of the application, the relative positions of different satellites in the satellite network are stable, so that the total channel capacity of the inter-satellite links is stable, and the connection condition of the inter-satellite links is stable; and because of the relative movement between the satellite and the gateway station, the actual channel capacity of the satellite-ground link is in a state of constantly changing, and the determination factors considered by the evaluation parameters of the inter-satellite link and the satellite-ground link are different, compared with the method for evaluating the inter-satellite link and the satellite-ground link by adopting a unified formula, the accuracy of the first evaluation parameter and the second evaluation parameter is improved, and therefore, a more proper data transmission path is selected.

Because of the relative movement between the satellite and the gateway station, the satellite-ground link has the characteristic of dynamic change, and the factor of the residual available time length is introduced into the evaluation factors of the satellite-ground link, so that the stability of the satellite-ground link can be reflected, and the accuracy of the second evaluation parameter can be further improved.

After the evaluation parameters of the inter-satellite link and the satellite-ground link are obtained, the evaluation parameters of the inter-satellite link and/or the satellite-ground link can be adjusted according to the congestion degree of the inter-satellite link and/or the satellite-ground link, namely, the evaluation parameters of the link can be adjusted according to the current data transmission pressure of the link, so that the finally selected data transmission path is influenced, the selection of a proper data transmission path is facilitated, and the probability of successfully completing the communication task is improved.

It should be noted that, the execution bodies of steps 301 to 307 may be one satellite in the satellite network where the first satellite is located, that is, the first network device and the second network device are both integrated in the satellites; alternatively, the execution bodies of steps 301 to 307 may be network devices on the ground, that is, the first network device and the second network device are integrated in the network devices on the ground; or, the execution bodies of steps 301 to 304 and steps 305 to 307 are different, and the specific situation can be flexibly determined in combination with the actual application scenario, which is not limited in the embodiment of the present application.

In addition, the embodiment of the present application may not limit the execution sequence of steps 301 to 304 and steps 305 to 307, and may execute steps 301 to 304 first, and then execute steps 305 to 307, that is, after dividing the channel capacity corresponding to each satellite-to-ground link, determine the transmission path adopted by each communication service based on the first channel capacity corresponding to each satellite-to-ground link acquired in step 304.

It is also possible to perform steps 305 to 307 first and then perform steps 301 to 304, and then replace the first channel capacity of the satellite-to-ground link in step 305 with the actual channel capacity of the satellite-to-ground link, that is, determine the transmission path adopted by each communication service first, that is, determine the communication service allocated to each feeder satellite (including the first satellite), and then acquire the first channel capacity corresponding to each satellite-to-ground link.

In order to better implement the above-described scheme of the embodiment of the present application on the basis of the embodiments corresponding to fig. 2 to 8, the following provides a related device for implementing the above-described scheme. Referring specifically to fig. 9, fig. 9 is a schematic structural diagram of a channel capacity determining apparatus according to an embodiment of the present application, where the channel capacity determining apparatus 900 includes: an acquisition module 901, configured to acquire an available time period of a first satellite-to-earth link formed between a first satellite and a first gateway station; the determining module 902 is configured to determine, according to a minimum actual channel capacity of the first satellite-to-ground link in the target time period, a first channel capacity of the first satellite-to-ground link in the target time period, where the target time period belongs to a time period within the available time period, and a length of the target time period is smaller than a length of the available time period, the actual channel capacity of the first satellite-to-ground link and the target distance are inversely related, and the target distance is a communication distance between the first satellite and the first gateway station, and the first channel capacity represents a channel capacity corresponding to each moment in the target time period.

In one possible design, the obtaining module 901 is further configured to obtain at least one slicing point corresponding to the available time period, where the at least one slicing point corresponds to a start point and/or an end point of the target time period, and the determining factors of the at least one slicing point include: the communication duration required by at least one static service provided by the first satellite is the communication duration which is known by the source node, the destination node, the required communication duration and the occupied network bandwidth before transmitting the data of the static service, and the network bandwidth represents the data quantity transmitted in unit time.

In one possible design, the obtaining module 901 is further configured to obtain a communication duration required by a first static service, where the first static service is a communication service with a longest communication duration required in a static service set, a minimum actual channel capacity of the first satellite-to-ground link in an available time period is a second channel capacity, and the static service set corresponds to a channel capacity other than the second channel capacity in the actual channel capacity of the first satellite-to-ground link; the obtaining module 901 is specifically configured to determine at least one segmentation point corresponding to an available time period according to a communication duration required by the first static service, where each target time period pointed to by the at least one segmentation point is greater than or equal to the communication duration required by the first static service.

In one possible design, the determining module 902 is further configured to determine, from a satellite network in which the first satellite is located, a target inter-satellite link and a second inter-satellite link that are used by the communication service provided by the first satellite, where the target inter-satellite link and the second inter-satellite link are determined based on the first evaluation parameter and the second evaluation parameter; the first evaluation parameters comprise evaluation parameters of inter-satellite links in a satellite network where the first satellite is located, and the determining factors of the first evaluation parameters comprise any one or more of the following: the current residual network bandwidth of the inter-satellite link, the time delay of the inter-satellite link or the total channel capacity of the inter-satellite link, the second evaluation parameter comprises an evaluation parameter of a satellite-to-ground link in a satellite network where the first satellite is located, and the determining factor of the second evaluation parameter comprises any one or more of the following: the current remaining network bandwidth of the satellite-to-ground link, the time delay of the satellite-to-ground link, or the first channel capacity of the satellite-to-ground link, the network bandwidth representing the amount of data transmitted per unit time.

In one possible design, the determining factor of the second evaluation parameter further includes a remaining available duration of the satellite-to-ground link.

In one possible design, the obtaining module 901 is further configured to obtain an update parameter corresponding to a satellite network where the first satellite is located, where the update parameter includes: a first updating parameter for updating a first evaluation parameter of the inter-satellite link and/or a second updating parameter for updating a second evaluation parameter of the satellite-to-ground link, the determining factor of the first updating parameter comprising a congestion degree of the inter-satellite link, the determining factor of the second updating parameter comprising a congestion degree of the satellite-to-ground link; the determining module 902 is specifically configured to determine, according to the updated first evaluation parameter and/or the updated second evaluation parameter, a target inter-satellite link and a second inter-satellite link used by the communication service provided by the first satellite.

It should be noted that, in the channel capacity determining apparatus 900, contents such as information interaction and execution process between each module/unit are based on the same concept, and specific contents may be referred to the description in the foregoing illustrated method embodiments of the present application, and are not repeated herein.

Referring to fig. 10, fig. 10 is a schematic structural diagram of a network device according to an embodiment of the present application, and specifically, a network device 1000 includes a processor 1001 and a memory 1003, where the processor 1001 is interconnected with the memory 1003 through a line.

The processor 1001 may be a central processing unit (central processing unit, CPU), a network processor (network processor, NP) or a combination of CPU and NP. The memory 1003 may be volatile memory or nonvolatile memory, or may include both volatile and nonvolatile memory. In other embodiments, the processor 1001 may also be interconnected with the transceiver 1002 by wires. The transceiver 1002 may be a fiber optic transceiver or a wireless radio frequency module, etc.

Wherein the processor 1001 invokes the program code in the memory 1003 for performing the steps of:

Acquiring an available time period of a first satellite-to-ground link formed between a first satellite and a first gateway station; and determining the first channel capacity of the first satellite-to-ground link in the target time period according to the minimum actual channel capacity of the first satellite-to-ground link in the target time period, wherein the target time period is included in the available time period, the length of the target time period is smaller than that of the available time period, the actual channel capacity of the first satellite-to-ground link and the target distance are in negative correlation, the target distance is the communication distance between the first satellite and the first gateway station, and the first channel capacity represents the channel capacity corresponding to each moment in the target time period.

In other embodiments, the network device 1000 is further configured to perform some or all of the functions performed by the first network device and the second network device in the foregoing power measurement method.

The embodiment of the application also provides a digital processing chip. The digital processing chip has integrated therein circuitry and one or more interfaces for implementing the functions of the processor 1001 described above. When the digital processing chip has a memory integrated therein, the digital processing chip may perform the method steps of any one or more of the previous embodiments.

Embodiments of the present application also provide a computer program product which, when run on a computer, causes the computer to perform the method as described in the embodiments of figures 2 to 8 above.

There is also provided in an embodiment of the present application a computer-readable storage medium having stored therein a program for performing signal processing, which when run on a computer, causes the computer to perform the method as described in the embodiments shown in the foregoing fig. 2 to 8.

It should be further noted that the above-described apparatus embodiments are merely illustrative, and that the units described as separate units may or may not be physically separate, and that units shown as units may or may not be physical units, may be located in one place, or may be distributed over a plurality of network units. Some or all of the modules may be selected according to actual needs to achieve the purpose of the solution of this embodiment. In addition, in the drawings of the embodiment of the device provided by the application, the connection relation between the modules represents that the modules have communication connection, and can be specifically implemented as one or more communication buses or signal lines.

From the above description of the embodiments, it will be apparent to those skilled in the art that the present application may be implemented by means of software plus necessary general purpose hardware, or of course by means of special purpose hardware including application specific integrated circuits, special purpose CPUs, special purpose memories, special purpose components, etc. Generally, functions performed by computer programs can be easily implemented by corresponding hardware, and specific hardware structures for implementing the same functions can be varied, such as analog circuits, digital circuits, or dedicated circuits. However, a software program implementation is a preferred embodiment for many more of the cases of the present application. Based on such understanding, the technical solution of the present application may be embodied essentially or in a part contributing to the prior art in the form of a software product stored in a readable storage medium, such as a floppy disk, a usb disk, a removable hard disk, a ROM, a RAM, a magnetic disk or an optical disk of a computer, etc., comprising several instructions for causing a computer device (which may be a personal computer, a training device, a network device, etc.) to perform the method according to the embodiments of the present application.

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 a computer-readable storage medium or transmitted from one computer-readable storage medium to another computer-readable storage medium, for example, the computer instructions may be transmitted from one website, computer, or data center to another website, computer, or data center by a wired (e.g., coaxial cable, fiber optic, 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 stored by a computer or a data storage device such as a training device, a data center, or the like that contains an integration of one or more available media. The usable medium may be a magnetic medium (e.g., a floppy Disk, a hard Disk, a magnetic tape), an optical medium (e.g., a DVD), or a semiconductor medium (e.g., a Solid State Disk (SSD)), or the like.

Claims

1. A method for determining channel capacity, the method comprising:

acquiring an available time period of a first satellite-to-ground link formed between a first satellite and a first gateway station;

and determining a first channel capacity of the first satellite-to-ground link in a target time period according to the minimum actual channel capacity of the first satellite-to-ground link in the target time period, wherein the target time period belongs to the time period in the available time period, the length of the target time period is smaller than that of the available time period, the actual channel capacity of the first satellite-to-ground link and a target distance are in negative correlation, the target distance is a communication distance between the first satellite and a first gateway station, and the first channel capacity represents the channel capacity corresponding to each moment in the target time period.

2. The method according to claim 1, wherein the method further comprises:

acquiring at least one segmentation point corresponding to the available time period, wherein the at least one segmentation point corresponds to a starting point and/or an ending point of the target time period, and determining factors of the at least one segmentation point comprise: the communication duration required by at least one static service provided by the first satellite is the communication service of which the source node, the destination node, the required communication duration and the occupied network bandwidth are known before transmitting the data of the static service.

3. The method according to claim 2, wherein the method further comprises:

acquiring a communication duration required by a first static service, wherein the first static service is a communication service with the longest communication duration required by a static service set, the minimum actual channel capacity of the first satellite-to-ground link in the available time period is a second channel capacity, and the static service set corresponds to a channel capacity outside the second channel capacity in the actual channel capacity of the first satellite-to-ground link;

the obtaining at least one segmentation point corresponding to the available time period comprises:

and determining at least one segmentation point corresponding to the available time period according to the communication duration required by the first static service, wherein each target time period pointed by the at least one segmentation point is greater than or equal to the communication duration required by the first static service.

4. A method according to any one of claims 1 to 3, further comprising:

determining a target inter-satellite link and a second satellite-to-ground link adopted by communication service provided by the first satellite from a satellite network where the first satellite is located, wherein the target inter-satellite link and the second satellite-to-ground link are determined based on a first evaluation parameter and a second evaluation parameter;

The first evaluation parameters comprise evaluation parameters of inter-satellite links in a satellite network where the first satellite is located, and the determining factors of the first evaluation parameters comprise any one or more of the following: the current residual network bandwidth of the inter-satellite link, the time delay of the inter-satellite link or the total channel capacity of the inter-satellite link, the second evaluation parameter comprises an evaluation parameter of a satellite-to-ground link in a satellite network where the first satellite is located, and the determining factor of the second evaluation parameter comprises any one or more of the following: the current remaining network bandwidth of the satellite-to-ground link, the time delay of the satellite-to-ground link, or the first channel capacity of the satellite-to-ground link.

5. The method of claim 4, wherein the determining factor of the second evaluation parameter further comprises a remaining available duration of the satellite-to-ground link.

6. The method of claim 4, wherein prior to determining the target inter-satellite link and the second satellite-to-ground link employed by the communication service provided by the first satellite, the method further comprises:

obtaining update parameters corresponding to a satellite network where a first satellite is located, wherein the update parameters comprise: a first updating parameter for updating a first evaluation parameter of the inter-satellite link and/or a second updating parameter for updating a second evaluation parameter of the satellite-to-ground link, wherein a determining factor of the first updating parameter comprises a congestion degree of the inter-satellite link, and a determining factor of the second updating parameter comprises the congestion degree of the satellite-to-ground link;

The determining a target inter-satellite link and a second satellite-to-ground link employed by the communication service provided by the first satellite includes:

and determining a target inter-satellite link and a second satellite-ground link adopted by the communication service provided by the first satellite according to the updated first evaluation parameter and/or the updated second evaluation parameter.

7. A channel capacity determining apparatus, the apparatus comprising:

the acquisition module is used for acquiring an available time period of a first satellite-to-ground link formed between a first satellite and a first gateway station;

the determining module is configured to determine, according to a minimum actual channel capacity of the first satellite-to-ground link in a target time period, a first channel capacity of the first satellite-to-ground link in the target time period, where the target time period belongs to a time period within the available time period, and a length of the target time period is smaller than a length of the available time period, the actual channel capacity of the first satellite-to-ground link and a target distance are inversely related, and the target distance is a communication distance between the first satellite and a first gateway station, and the first channel capacity represents a channel capacity corresponding to each moment in the target time period.

8. The apparatus of claim 7, wherein the device comprises a plurality of sensors,

the obtaining module is further configured to obtain at least one segmentation point corresponding to the available time period, where the at least one segmentation point corresponds to a start point and/or an end point of the target time period, and a determining factor of the at least one segmentation point includes: the communication duration required by at least one static service provided by the first satellite is the communication service of which the source node, the destination node, the required communication duration and the occupied network bandwidth are known before transmitting the data of the static service.

9. The apparatus of claim 10, wherein the device comprises a plurality of sensors,

the acquiring module is further configured to acquire a communication duration required by a first static service, where the first static service is a communication service with a longest communication duration required in a static service set, a minimum actual channel capacity of the first satellite-to-ground link in the available time period is a second channel capacity, and the static service set corresponds to a channel capacity other than the second channel capacity in the actual channel capacity of the first satellite-to-ground link;

the acquiring module is specifically configured to determine the at least one segmentation point corresponding to the available time period according to a communication duration required by the first static service, where each target time period pointed by the at least one segmentation point is greater than or equal to the communication duration required by the first static service.

10. The device according to any one of claims 7 to 9, wherein,

the determining module is further configured to determine, from a satellite network in which the first satellite is located, a target inter-satellite link and a second satellite-to-ground link adopted by a communication service provided by the first satellite, where the target inter-satellite link and the second satellite-to-ground link are determined based on a first evaluation parameter and a second evaluation parameter;

the first evaluation parameters comprise evaluation parameters of inter-satellite links in a satellite network where the first satellite is located, and the determining factors of the first evaluation parameters comprise any one or more of the following: the current residual network bandwidth of the inter-satellite link, the time delay of the inter-satellite link or the total channel capacity of the inter-satellite link, the second evaluation parameter comprises an evaluation parameter of a satellite-to-ground link in a satellite network where the first satellite is located, and the determining factor of the second evaluation parameter comprises any one or more of the following: the current remaining network bandwidth of the satellite-to-ground link, the time delay of the satellite-to-ground link, or said first channel capacity of the satellite-to-ground link, the network bandwidth representing the amount of data transmitted per unit time.

11. The apparatus of claim 10, wherein the determining factor of the second evaluation parameter further comprises a remaining available duration of a satellite-to-ground link.

12. The apparatus of claim 11, wherein the device comprises a plurality of sensors,

the acquiring module is further configured to acquire an update parameter corresponding to a satellite network where the first satellite is located, where the update parameter includes: a first updating parameter for updating a first evaluation parameter of the inter-satellite link and/or a second updating parameter for updating a second evaluation parameter of the satellite-to-ground link, wherein a determining factor of the first updating parameter comprises a congestion degree of the inter-satellite link, and a determining factor of the second updating parameter comprises the congestion degree of the satellite-to-ground link;

the determining module is specifically configured to determine, according to the updated first evaluation parameter and/or the updated second evaluation parameter, a target inter-satellite link and a second inter-satellite link adopted by the communication service provided by the first satellite.

13. A computer readable storage medium, characterized in that the computer readable storage medium has stored therein a program which, when run on a computer, causes the computer to perform the method according to any of claims 1 to 6.

14. A network device comprising a processor interconnected by a line to a memory, the processor invoking program code in the memory for performing the method of any of claims 1-6.