专利摘要:
The present invention relates to a method and a system for dynamically allocating power for a satellite access network (14). The method comprises a step of acquiring a signal representative of an instantaneous power available on board at least one satellite (15) and a signal representative of the bit rate in each resource allocation manager (141). of the satellite access network (14), a conversion step, for each allocation manager of the resource (141), of the signal representative of the bit rate in said allocation manager of the resource in a value corresponding to the power consumed on board the satellite (15) to obtain this bit rate, a step of calculating a total power margin equal to the difference between the power available on board the satellite and the sum of the powers consumed by each allocation manager of the resource (141), a power allocation step, the power value allocated being a function of the calculated total power margin.
公开号:FR3026258A1
申请号:FR1402107
申请日:2014-09-22
公开日:2016-03-25
发明作者:Pierre Tayrac;Olivier Courseille;Cyrille Yves Joel Blosse;Bruno Roger
申请人:Thales SA;
IPC主号:
专利说明:

[0001] METHOD FOR DYNAMIC ALLOCATION OF AVAILABLE INSTANT POWER OF A SATELLITE AND ASSOCIATED SYSTEM
[0002] The present invention relates to the field of satellite telecommunications. The present invention more particularly relates to a method and a dynamic management system of the available instantaneous power of a satellite.
[0003] The optimization of the capacity of a telecommunications satellite consists in matching the total power available on board the satellite, with the power demand required by all the networks accessing the satellite. Currently, when a satellite telecommunication system is deployed, the use of the satellite energy is planned on the ground considering a static power available on the satellite. The value of this power takes into account a margin covering all the uncertainties over a time scale of a few months or even several years. Similarly, a fixed satellite power is allocated to each satellite access network, representative of a transmission throughput of this network. This planning assumes that the power available on board does not vary, as does the transmission rate of the satellite access networks. However, the available power of a telecommunication satellite varies over time. These variations can be due, for example, to the aging of the satellite and its electronics, to the variations of the payload due to thermal and / or thermoelastic problems, to the problems of pointing of the antennas. Similarly, the Satellite Access Networks undergo operational variations in traffic leading to variable edge power requirements over time. Due to the use of a fixed edge power, some of the power actually available on board the satellite is not used and is lost. This additional power could, for example, make it possible to increase the capacity of the communication system by increasing the bit rate and / or the availability of the telecommunication links. The energy onboard a satellite being limited, it is interesting to propose a solution to optimize the use of available instantaneous power. Similarly, the use of a fixed power allocated to each satellite access network does not allow adaptation to real traffic, and therefore represents a loss of efficiency. One solution of the prior art for increasing the use of the resources of the satellite is to overexploit the power of said satellite ("overbooking of satellite capacity"), especially at the beginning of the mission of the satellite.One disadvantage of this practice is that the effects of This over-exploitation can not be technically controlled, One aim of the invention is in particular to correct one or more of the disadvantages of the prior art by proposing a solution making it possible to exploit the power resource actually available at the satellite level. while adapting to the real needs of the satellite access networks, the subject of the invention is a dynamic power allocation method for a group of at least one satellite access network associated with a group. at least one satellite, said group of at least one satellite access network comprising a plurality of resource allocation managers, said method being implemented by a dynamic power allocation device and comprising: a step of acquiring a signal representative of an instantaneous power available on board at least one satellite and a signal representative of a need; in each allocation manager of the resource of each satellite access network, - a conversion step, for each resource allocation manager of the group of at least one satellite access network, of the representative signal the need for a bit rate in said satellite access network in a value corresponding to the power consumed on board the satellite to obtain this bit rate; a step of calculating a total power margin equal to the difference between the power available at edge of the satellite and the sum of the powers consumed by each allocation manager of the resource, a power allocation step to the different allocation managers of the resource of the group e of at least one satellite access network, the value of power allocated being a function of the total calculated power margin. According to one embodiment: if the total power margin is greater than a first predetermined threshold, during the power allocation step a dynamic power allocation module allocates to the various allocation managers of the group resource of at least one satellite access network, the power consumption levels on board the previously calculated satellite, - if the total power margin is less than a second predetermined threshold, less than or equal to said first predetermined threshold during the power allocation step, a dynamic power allocation module allocates to the various resource allocation managers of the group of at least one satellite access network the power levels consumed on board the 20 satellite calculated previously, according to an embodiment, during the power reduction step allocated to the various allocation managers of the resource this, the dynamic power allocation device allocates to the various allocation managers of the resource a predetermined power level 25 by default if the power margin is less than a third predetermined threshold. According to one embodiment, the signal representative of the bit rate requirement for at least one allocation manager of the resource is defined as a function of the bit rate actually transmitted over a period of time. In one embodiment, the signal representative of the instantaneous power available onboard a satellite is transmitted to the dynamic allocation device by a satellite control center.
[0004] According to one embodiment, the method further comprises a step of acquiring a signal representative of the quality of service associated with the data to be transmitted by each allocation manager of the resource and according to which the power allocation is performed according to said quality information. According to one embodiment, the various calculations are performed using at least one algorithm stored in a memory zone of the dynamic power allocation system. The invention also relates to a dynamic power allocation system configured to implement the previously described method comprising a dynamic power allocation device and at least one satellite access network, said group of at least a satellite access network comprising a plurality of resource allocation managers, each allocation manager of the resource being configured to transmit data to at least one modem, each resource allocation manager being connected to the resource; dynamic power allocation device and each resource allocation manager comprising a measurement device configured to measure the bit rate in said resource allocation manager and to output a signal representative of said bit rate and to transmit this signal to the device of dynamic power allocation, said dynamic power allocation device comprising a A computing module configured to receive signals representative of different quantities and to perform calculations with these quantities, a module configured to allocate a power level to the different resource allocation managers of the group of at least one access network satellite and at least one memory area. According to one embodiment, the system comprises a satellite control center configured to receive the telemetry data of at least one satellite, said telemetry data including the instantaneous power available on board each satellite, and transmit to the device of the satellite. dynamic power allocation a signal representative of the instantaneous power available on board each satellite. According to one embodiment, the system comprises a link supervision center configured to calculate and transmit a signal representative of the instantaneous power available on board each satellite. Other features and advantages of the present invention will emerge more clearly on reading the following description, given as an illustration and not as a limitation, and with reference to the appended drawings, in which: FIG. telecommunication device known from the prior art; FIG. 2 represents an exemplary embodiment of a system for dynamically allocating the instantaneous power available from at least one satellite according to the invention; It should be noted that the use of the term "available instantaneous power of the satellite" refers to the instantaneous power available at the transponders of the satellite.The principle of the invention is based on a coupling between the telecommunications satellite (s) and the ground station or stations so as to regularly inform it of the value of the instantaneous power available on board the satellite or satellites and thus be able to optimize the use of the instantaneous power resources available at each satellite dynamically. In addition, pooling the power requirements of the access networks makes it possible to optimize these power requirements and their variations over time.
[0005] FIG. 1 represents a telecommunication system known from the prior art. The system comprises a satellite control center 11 or SCC for Satellite Control Center according to the English terminology. The satellite control center continuously monitors the behavior of the satellite (s) for which it is responsible, in particular using telemetry data. The satellite control center is the ground-based medium that controls the satellite (s) and ensures the proper functioning of the satellite. The monitoring center of the links 12 or CSM for Spectrum Monitoring Communication according to the English terminology monitors the payload (or payload according to the English terminology) of the satellite. In particular, it provides the radio frequency and digital characteristics of satellite transponders. It can also detect unwanted events such as interference or interference problems. The satellite access networks 14 comprise a plurality of resource allocation managers (or hubs) 141, each allocation manager of the resource 141 managing at least one modem 142. A satellite access network comprises a data access manager 141. allocation of the resource 141 and at least one modem 142. In order not to overload the figure, only one modem 142 per allocation manager of the resource 141 is shown in FIG. 1. The satellite access networks 14 are connected to a Mission Control Center 13 or MCC for Mission Control Center according to the English terminology. This center 13 provides operational management of the payload of the satellite. In particular, it defines the mission plan for the satellite control center 11 and for each satellite access network 14. This mission plan includes, among other things, the power allocation table defining the rate of power sharing between the different satellite access networks. resource allocation managers 141 of the different satellite access networks 14. As mentioned above, the mission plan is defined at the beginning of the mission and remains fixed throughout the mission until a new mission plan it is planned manually by an operator at the mission control center 13. Similarly, the connection between the mission control center 13 and the satellite access network 14 is unidirectional 302 62 5 8 7 and serves inter alia to the allocation of the power between the different allocation managers of the resource 141 according to the sharing rate defined in the mission plan. Thus each allocation manager of the resource operates independently. The control centers of the satellites 11, the monitoring of the links 12, the mission control 13 as well as the various allocation managers of the resource 141 of the satellite access networks 14 are generally distributed in a ground station. The different modems 142 are located at the level of the users. FIG. 2 represents an exemplary embodiment of a system for dynamically allocating the instantaneous power available from at least one satellite according to the invention. The system may include a satellite control center 11, a mission control center 13 and at least one satellite access network 14. In some embodiments, the system may also include a link monitoring center 12. In FIG. 2 the system only manages a satellite 15. This example is in no way limiting and the invention can be generalized in the case where the system is in relation with a plurality of satellites 15. The satellite or satellites 15 can be of the transparent type, that is to say that these satellites 15 reflect the signals received from one or more ground stations using transponders. Satellites can also be of the regenerative type, with demodulation of the received signals and modulation of the transmitted signals. The group of at least one satellite 15 comprises at least one multichannel satellite. The dynamic allocation device 20 of the instantaneous power available from at least one satellite 15 is in charge of the allocation of the power resources to the different allocation managers of the resource 141 of the satellite access networks 14 in function requests for traffic coming from the groups of modems 142 connected to the different allocation managers of the resource 141 and according to the power available at the satellite. This device 20 is interposed between the mission control center 11 and the satellite access networks 14. It makes it possible to establish a link between the payload of the satellite 15 and the ground station to exchange data making it possible to define the value of the instantaneous power available on board the satellite. In the embodiment illustrated in FIG. 2, the dynamic allocation device 20 is connected to the satellite control center 11, to the mission control center 13 and to the satellite access networks 14. The dynamic allocation device 20 can be connected to a link monitoring center 12. The satellite access network group comprises N satellite access networks referenced STi to STN. As before, in order not to overload the figure, only a modem 142 is represented by satellite access network. Of course, satellite access networks may have a greater number. In order to dynamically manage the instantaneous power available on board a satellite, the dynamic allocation device 20 realizes the acquisition of a signal representative of the value of the instantaneous powers available on board the satellite 15 for different subsets of the satellite. the payload. This acquisition can be performed at regular intervals or in a non-regular manner over time. Depending on the configuration of the satellite and the optimization sought, these subassemblies may be, for example, high-power amplifiers, sets of high-power amplifiers (of the same satellite transmission cover), the payload. According to one embodiment, the time interval between the different acquisitions may be a few minutes. This signal may be recorded at the time of acquisition in a memory area of the system for later use. Advantageously, the periodic update of the satellite performance to take into account the fluctuations of the performance of the satellite 15 over time. According to one embodiment, the signal representative of the instantaneous power available on board the satellite 15 can be transmitted by the control center of the satellites 11. As seen above, among the telemetry signals transmitted by the satellite 15 are signals representative of the available instantaneous power levels at the satellite for the different subsets of the payload. The control center of the satellites 11 can thus extract this information and transmit it to the dynamic allocation device 20 in the form of signals representative of these quantities. For this purpose, the satellite control center 11 may comprise a module configured to extract telemetry signals transmitted by the satellite 15, the signals representative of the available instantaneous power levels of the satellite and transmit to the dynamic allocation device 20 signals. representative of these values. According to another embodiment, the signals representative of the powers available on board each satellite are supplied by the link monitoring center 12. This center 12 may comprise, for example, a spectrum analyzer type measuring device which measures the received power levels and delivers signals representative of these received powers. This device also measures the levels of use of the on-board amplifiers. From these measurements, the measuring device of the link monitoring center 12 calculates the instantaneous available powers available at the satellite and delivers signals representative of these instantaneous powers available on board the satellite that it transmits to the satellite allocation device. 20. In one embodiment, the satellite control center 11 and the link supervision center 12 are connected to the dynamic allocation device 20 and can transmit together the signals representative of the instantaneous powers available on board the satellite 15. for example for the sake of redundancy. The dynamic allocation device 20 also performs, for each allocation manager of the resource 141 of each satellite access network 14, the acquisition of a signal representative of the data rate of the allocation manager of the resource 141 considered. For this, each allocation manager of the resource 141 may comprise a measuring device configured to measure the different elementary bit rates from the different modems 142 in said allocation manager of the resource and to deliver a signal representative of a global bit rate. . This measuring device may also be configured to transmit this signal to the dynamic power allocation device. This signal can be recorded simultaneously at the time of acquisition in a memory area of the dynamic power allocation system so as to be used later. In addition to these bit rate data, the device can also acquire at the level of each allocation manager of the resource signals representative of other information, such as the quality of service of the data to be transmitted. This quality of service information can, for example, serve as a criterion for allocating power to the different allocation managers of the resource 141. At this time, the dynamic allocation device 20 has the value of the available power and the bit rates. required by each satellite access network. As a function of the evolution of the bit rate request from the different allocation managers of the resource 141, the dynamic power allocation module can thus, for example, by using an algorithm stored in a memory zone of the dynamic power allocation system, increase or decrease the power allocated to one or more allocation managers of the resource 141. This principle is applied for all the satellite access networks 14. In case of conflict, in particularly in the case of lack of available power to meet a bit rate requirement for one or more satellite access networks 14, a priority mechanism can be implemented in the power allocation algorithm, so as to increase as a priority, the power of the highest priority satellite access networks 14, for example using the quality of service information given by the allocation managers of the resource. According to one embodiment, the signal representative of the bit rate requirement for at least one allocation manager of the resource 141 is defined as a function of the actual transmitted rate over a predetermined period of time. Each signal representative of the rate need of the allocation managers of the resource 141 is converted into a value corresponding to the power that would be consumed on board the satellite 15 to obtain this bit rate. This conversion can consist in producing, for each signal representative of the bit rate requirement of the allocation managers of the resource 141, a link budget calculation that makes it possible to identify the levels of ground power and minimum edge ensuring transmission. . This conversion can be performed at the level of the satellite access network 14 or at the level of the dynamic allocation device 20, for example by a calculation module. According to one embodiment, the conversion can be performed using an algorithm stored in a memory zone of the dynamic power allocation system 5, for example a memory zone of the dynamic power allocation device 20. different powers consumed at the board level for the various allocation managers of the resource are then summed, so as to evaluate the total powers consumed by the satellite 15, necessary to allow the total data rate transiting in all the allocation managers of resource 141 of the satellite access network 14. These total power values are compared with the available power values on board the satellite so as to verify whether an allocation, to the allocation managers of the resource 141, of the calculated powers 15 would result in saturation of the subsets of the payload or if such an allocation would leave them with the power of vailable. The calculation module of the dynamic allocation device 20 then defines total power margins, equal to the difference between the sum of the powers available on board the satellite and the sum of the powers corresponding to the speeds desired by the different allocation managers. of the resource 141 of each subset of the payload. The dynamic power allocation device 20 can thus allocate to the different allocation managers of the resource 141 a value 25 (positive or negative) of power as a function of the value of the total power margins, compared with thresholds, for each subset of the payload. If the total margin is greater than a first predetermined threshold, the dynamic allocation device 20 can allocate, to each allocation manager 30 of the resource 141, the previously calculated power taking into account, for example, its debit request or its request. measured flow. For this purpose, the dynamic power allocation device 20 may comprise a power allocation module configured to allocate a certain power level to the different allocation managers of the resource 141. A total margin greater than said first threshold predetermined may translate an under exploitation of the available instantaneous power of at least a subset of the payload. The power allocation module can therefore allocate more power to some resource allocation managers of the satellite access network resources 14. If the total margin is less than a second predetermined threshold, said second threshold being less than or equal to first threshold mentioned above, the dynamic allocation device 20 can not allocate to each allocation manager of the resource 141, the power value equivalent to the desired rate value. According to one embodiment, the dynamic power allocation device 20 can reduce the value of the various powers to be allocated to the different allocation managers of the resource 141 so as to reduce the difference between the sum of the powers available on board. of the satellite and the sum of the powers corresponding to the bit rates that can be allocated to the various allocation managers of the resource 141, for example, to a predetermined positive value translating, for example, a safety margin. This value may for example be stored in a memory zone of the device 20 or the power allocation system. According to an embodiment of the method according to the invention, when the total measured power margin is less than a third predetermined threshold (or security threshold), the dynamic allocation device 20 can allocate to each allocation manager of the resource 141 a power value defined by default in the mission plan by the mission control center 13. For this, the power allocation module can read in a memory area for example the power allocation device 20 or the mission control center 13 the mission plan and assign each resource allocation manager the power level recorded in the mission plan allocation table. According to one embodiment, one or more of the above-mentioned thresholds may be stored in a memory zone of the dynamic power allocation system or the dynamic allocation device 20.
[0006] According to one embodiment of the method, the calculation module of the dynamic allocation device 20 can also calculate the utilization rate of the allocated power of each allocation manager of the resource and compare this value with a floor rate predetermined, reflecting an under exploitation of the allocated power. When the utilization rate measured on an allocation manager of the resource 141 becomes lower than this floor rate, the power allocation module of the dynamic allocation device 20 can reduce the allocated power of the allocation manager of the allocation resource. resource 141 under exploited for example by reducing the value of the power allocated to the allocation manager of the resource under exploited at the floor value. The power released, corresponding to the difference between the power value allocated and the floor value, can thus be reallocated to one or more other allocation managers of the resource 141 of one or more satellite access networks 14. The process according to the invention has been described considering the equivalent power values that the transponders of the satellite or satellites 15 would consume to obtain the data rate of the allocation managers of the resource 141. This description is in no way limiting and the same method can be considered by taking into account the bit rate in each allocation manager of the resource 141 of each of the satellite access networks 14.
[0007] According to one embodiment, the various calculations are carried out using at least one algorithm stored in a memory zone of the dynamic power allocation system, for example a memory zone of the dynamic power allocation device.
[0008] According to one embodiment, the dynamic power allocation device 20 may be or comprise a computer, a processor, a logical processing unit or any other equivalent computer means. Likewise, the various modules present in the dynamic power allocation system, such as, for example, the calculation modules, the power allocation modules, may be or comprise one or more computers, one or more processors, one or more several logical processing units a combination of the aforementioned elements or any other equivalent computer means.
[0009] Advantageously, the invention makes it possible to optimize the use of the power of the transponders of the satellite or satellites 15 and thus to improve the instantaneous capacitance of the satellite access network or networks 14 in terms of bit rate and / or availability.
[0010] It also allows exploitation of the power resources of the satellite 15 taking into account the instantaneous performance of the payload and its fluctuations over time. This makes it possible to optimize the use of satellite power over time.
权利要求:
Claims (10)
[0001]
REVENDICATIONS1. A method of dynamic power allocation for a group of at least one satellite access network (14) associated with a group of at least one satellite (15), said group of at least one satellite access network ( 14) comprising a plurality of allocation managers of the resource (141), said method being implemented by a dynamic power allocation device (20) and being characterized in that it comprises: a step of acquisition of a signal representative of instantaneous power available on board at least one satellite (15) and of a signal representative of a bit rate requirement in each resource allocation manager (141) of each network satellite access (14), a step of converting, for each allocation manager of the resource (141) of the group of at least one satellite access network (14), the signal representative of the bitrate requirement in said satellite access network in a value corresponding to the power cons called on board the satellite (15) to obtain this rate, - a step of calculating a total power margin equal to the difference between the power available on board the satellite and the sum of the powers consumed by each allocation manager. the resource (141), - a step of allocating power to the different allocation managers of the resource (141) of the group of at least one satellite access network (14), the value of the allocated power being a function of the total calculated power margin.
[0002]
2. Method according to the preceding claim wherein - if the total power margin is greater than a first predetermined threshold, during the power allocation step a dynamic power allocation module allocates to the various allocation managers of the resource (141) of the group of at least one satellite access network (14) the power consumption levels on board the satellite calculated previously, if the total power margin is less than a second predetermined threshold, less than or equal to said first threshold predetermined threshold, during the power allocation step, a dynamic power allocation module allocates to the different allocation managers of the resource (141) of the group of at least one satellite access network (14) the levels of power consumed on board the satellite calculated previously,
[0003]
3. Method according to the preceding claim wherein during the power reduction step allocated to the various allocation managers of the resource (141), the dynamic power allocation device (20) allocates to the various allocation managers. of the resource (141) a predetermined power level by default if the power margin is less than a third predetermined threshold.
[0004]
The method according to one of the preceding claims, wherein the signal representative of the bit rate requirement for at least one allocation handler of the resource (141) is defined according to the actual transmitted bit rate over a period of time.
[0005]
5. Method according to one of the preceding claims wherein the signal representative of the instantaneous power available on board a satellite (15) is transmitted to the dynamic allocation device (20) by a satellite control center (11).
[0006]
6. Method according to one of the preceding claims, wherein the method further comprises a step of acquiring a signal representative of the quality of service associated with the data to be transmitted by each allocation manager of the resource (141) and according to which the power allocation is performed according to said quality information.
[0007]
7. Method according to one of the preceding claims wherein the different calculations are performed using at least one algorithm stored in a memory area of the dynamic power allocation system.
[0008]
8. Dynamic power allocation system configured to implement the method according to one of the preceding claims, characterized in that it comprises a dynamic power allocation device (20) and at least one satellite access network ( 14), said group of at least one satellite access network (14) comprising a plurality of resource allocation managers (141), each allocation manager of the resource being configured to transmit data to at least one a modem (142), each allocation manager of the resource (141) being connected to the dynamic power allocation device (20) and each resource allocation manager (141) including a measurement device configured to measure the bit rate in said allocation manager of the resource and delivering a signal representative of said bit rate and for transmitting this signal to the dynamic power allocation device (20), said device f dynamic power allocation (20) comprising a calculation module configured to receive signals representative of different quantities and perform calculations with these quantities, a module configured to allocate a power level to the various allocation managers of the resource (141) of the group of at least one satellite access network (14) and at least one memory area.
[0009]
The system according to the preceding claim, wherein the system comprises a satellite control center (11) configured to receive the telemetry data from at least one satellite (15), said telemetry data including the instantaneous power available onboard the satellite. each satellite, and transmit to the dynamic power allocation device (20) a signal representative of the instantaneous power available on board each satellite.
[0010]
10. System according to one of claims 8 or 9 wherein the system comprises a link supervision center (12) configured to calculate and transmit a signal representative of the instantaneous power available on board each satellite.
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同族专利:
公开号 | 公开日
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2015-08-25| PLFP| Fee payment|Year of fee payment: 2 |
2016-03-25| PLSC| Publication of the preliminary search report|Effective date: 20160325 |
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2020-08-26| PLFP| Fee payment|Year of fee payment: 7 |
优先权:
申请号 | 申请日 | 专利标题
FR1402107A|FR3026258B1|2014-09-22|2014-09-22|METHOD FOR DYNAMIC ALLOCATION OF AVAILABLE INSTANT POWER OF A SATELLITE AND ASSOCIATED SYSTEM|FR1402107A| FR3026258B1|2014-09-22|2014-09-22|METHOD FOR DYNAMIC ALLOCATION OF AVAILABLE INSTANT POWER OF A SATELLITE AND ASSOCIATED SYSTEM|
IL241707A| IL241707A|2014-09-22|2015-09-20|Dynamic allocation process of the instant available power of satellite and associated system|
US14/860,466| US9900081B2|2014-09-22|2015-09-21|Method for the dynamic assignment of the instantaneous power available from a satellite and associated system|
EP15186002.0A| EP2999138B1|2014-09-22|2015-09-21|Method for dynamically allocating the available instantaneous power of a satellite and associated system|
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