CN112448754B - Resource allocation method, device, storage medium and satellite communication system - Google Patents

Resource allocation method, device, storage medium and satellite communication system Download PDF

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CN112448754B
CN112448754B CN201910839207.0A CN201910839207A CN112448754B CN 112448754 B CN112448754 B CN 112448754B CN 201910839207 A CN201910839207 A CN 201910839207A CN 112448754 B CN112448754 B CN 112448754B
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terminal
preset
resource
resources
multiplexing
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CN112448754A (en
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王新玲
方冬梅
李华栋
杨芸霞
鲁志兵
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Shenzhen Yunliantong Communication Service Co ltd
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Hytera Communications Corp Ltd
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    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04B—TRANSMISSION
    • H04B7/00—Radio transmission systems, i.e. using radiation field
    • H04B7/14—Relay systems
    • H04B7/15—Active relay systems
    • H04B7/185—Space-based or airborne stations; Stations for satellite systems
    • H04B7/1851—Systems using a satellite or space-based relay
    • H04B7/18519—Operations control, administration or maintenance
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L41/00—Arrangements for maintenance, administration or management of data switching networks, e.g. of packet switching networks
    • H04L41/12—Discovery or management of network topologies
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W72/00—Local resource management
    • H04W72/20—Control channels or signalling for resource management
    • H04W72/21—Control channels or signalling for resource management in the uplink direction of a wireless link, i.e. towards the network
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02D—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN INFORMATION AND COMMUNICATION TECHNOLOGIES [ICT], I.E. INFORMATION AND COMMUNICATION TECHNOLOGIES AIMING AT THE REDUCTION OF THEIR OWN ENERGY USE
    • Y02D30/00—Reducing energy consumption in communication networks
    • Y02D30/70—Reducing energy consumption in communication networks in wireless communication networks

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  • Computer Networks & Wireless Communication (AREA)
  • Signal Processing (AREA)
  • Physics & Mathematics (AREA)
  • Astronomy & Astrophysics (AREA)
  • Aviation & Aerospace Engineering (AREA)
  • General Physics & Mathematics (AREA)
  • Mobile Radio Communication Systems (AREA)
  • Radio Relay Systems (AREA)

Abstract

The application discloses a resource allocation method, a device, a storage medium and a satellite communication system, wherein the method comprises the following steps: under the condition that the establishment of the terminal bearing is detected, determining the resource meeting the preset conditions as a first target resource from preset resources, wherein the preset conditions comprise: the concentration degree of the spatial position distribution between the multiplexing terminals is larger than a preset degree threshold value, the number of the multiplexing terminals is smaller than a preset number threshold value, and the multiplexing terminals are multiplexed terminals. And transmitting the first target resource to the terminal through the satellite, so that the terminal adopts the first target resource to transmit information to the base station. By the scheme provided by the application, the accuracy of information obtained by demodulating the information carried by the first target resource by the base station is improved.

Description

Resource allocation method, device, storage medium and satellite communication system
Technical Field
The present invention relates to the field of electronic information, and in particular, to a resource allocation method, apparatus, storage medium, and satellite communication system.
Background
A satellite communication system is shown in fig. 1 and includes satellites, base stations and terminals. The satellite moves along the preset orbit at a high speed, and the coverage area of the satellite signal on the ground is large, and the diameter can reach 1000 km. The communication between the terminal and the base station is forwarded through the satellite, namely, the process of sending the message to the base station by the terminal is that the terminal sends the message to the satellite, and the satellite forwards the message to the base station; the process of the base station sending the message to the terminal is that the base station sends the message to the satellite, and the satellite forwards the message to the terminal. The satellite and the base station communicate through a feed link.
The information sent by the terminal to the base station requires resources for carrying. For example, the resources may include uplink physical control channel (Physical Uplink Control Channel, PUCCH) resources and sounding reference signal (Sounding Reference Signal, SRS) resources. The PUCCH resource is used for carrying uplink control information, and the SRS resource is used for carrying a sounding reference signal, where the sounding reference signal is used for estimating uplink channel quality. To save resources, a plurality of terminals may multiplex one resource. After receiving the modulation information (information obtained by modulating the original information) sent by the terminal, the base station demodulates the modulation information.
However, the demodulation performance of the base station for some modulation information is poor, that is, the difference between the information demodulated by the base station from some modulation information and the original information is large.
Disclosure of Invention
The application provides a resource allocation method, a resource allocation device, a storage medium and a satellite communication system, and aims to solve the problem that demodulation performance of a base station on certain modulation information is poor.
In order to achieve the above object, the present application provides the following technical solutions:
the application provides a resource allocation method, which comprises the following steps:
under the condition that the establishment of the terminal bearing is detected, determining the resource meeting the preset condition as a first target resource from preset resources; the preset conditions include: the concentration degree of the spatial position distribution between the multiplexing terminals and the terminals is larger than a preset degree threshold value, and the number of the multiplexing terminals is smaller than a preset number threshold value; the multiplexing terminal of any one of the preset resources is a terminal which has multiplexed the resources;
Transmitting the first target resource to the terminal through a satellite; and enabling the terminal to send information to the base station by adopting the first target resource.
Optionally, the determining manner of whether the concentration degree of the spatial position distribution between the multiplexing terminal of any non-idle resource in the preset resources and the terminal is greater than the preset degree threshold includes:
generating a terminal position topological graph according to the space position information of each terminal in the satellite communication system;
according to the terminal position topological graph, respectively calculating the distance between the space position of each multiplexing terminal of the non-idle resource and the space position of the terminal to obtain a plurality of distances;
and under the condition that each distance in the plurality of distances is smaller than a preset distance threshold value, the concentration degree of the spatial position distribution between the multiplexing terminal of the non-idle resources and the terminal is larger than the preset degree threshold value.
Optionally, the spatial location information of any one terminal includes: at least one of longitude, latitude, and altitude;
the determining mode of whether the concentration degree of the spatial position distribution between the multiplexing terminal of any non-idle resource in the preset resources and the terminal is greater than the preset degree threshold value comprises the following steps:
Generating a terminal position topological graph according to the space position information of each terminal in the satellite communication system;
according to the terminal position topological graph, respectively calculating longitude differences, latitude differences and altitude differences between each multiplexing terminal of the non-idle resources and the terminal to obtain a plurality of longitude differences, a plurality of latitude differences and a plurality of altitude differences;
and under the condition that at least one of each longitude difference value is smaller than a preset longitude threshold value, each latitude difference value is smaller than a preset latitude threshold value and each altitude difference value is smaller than a preset altitude threshold value, the concentration degree of the spatial position distribution between the multiplexing terminal of the non-idle resources and the terminal is larger than the preset degree threshold value.
Optionally, the determining manner of whether the concentration degree of the spatial position distribution between the multiplexing terminal of any non-idle resource in the preset resources and the terminal is greater than the preset degree threshold includes:
and under the condition that the spatial position of the multiplexing terminal of the non-idle resource and the spatial position of the terminal belong to the same preset area, the concentration degree of the spatial position distribution between the multiplexing terminal of the non-idle resource and the terminal is larger than the preset degree threshold.
Optionally, the preset resources include: a first preset resource; the first preset resources are part of the preset resources;
under the condition that the establishment of the terminal bearing is detected, determining the resource meeting the preset condition as a first target resource from preset resources comprises the following steps:
and under the condition that the terminal bearing establishment is detected, determining the resource meeting the preset condition as the first target resource from the first preset resource.
Optionally, the preset resources further include: a second preset resource; the second preset resource is a resource except the first preset resource in the preset resources;
and before determining that the resource meeting the preset condition is the first target resource from the first preset resource under the condition that the terminal bearing establishment is detected, the method further comprises the following steps:
under the condition that the random access of the terminal is detected, selecting resources with the number of multiplexing terminals smaller than a first preset number threshold value from the second preset resources as second target resources;
transmitting the second target resource to the terminal through a satellite, so that the terminal adopts the second target resource and transmits information to the base station through the satellite; the information includes: spatial location information of the terminal.
Optionally, after the first target resource is sent to the terminal through the satellite, the method further includes:
in the multiplexing terminal of the first target resource, when the distribution concentration degree between the spatial position updated by the terminal and the spatial positions of other terminals is not greater than the preset degree threshold value, determining that the resource meeting the preset condition is the updated first target resource from the first preset resource; the other terminals are terminals except the terminal in the multiplexing terminal of the first target resource;
and sending the updated first target resource to the terminal through the satellite.
Optionally, the resources include PUCCH resources and SRS resources.
The application also provides a resource allocation device, which is applied to the base station and comprises:
the determining module is used for determining resources meeting preset conditions as first target resources from preset resources under the condition that the establishment of the terminal bearing is detected; the preset conditions include: the concentration degree of the spatial position distribution between the multiplexing terminals and the terminals is larger than a preset degree threshold value, and the number of the multiplexing terminals is smaller than a preset number threshold value; the multiplexing terminal of any one of the preset resources is a terminal which has multiplexed the resources;
The sending module is used for sending the first target resource to the terminal through a satellite; and enabling the terminal to send information to the base station by adopting the first target resource.
Optionally, the method further comprises a judging module, configured to judge whether the concentration degree of spatial position distribution between the multiplexing terminal of any non-idle resource in the preset resources and the terminal is greater than the preset degree threshold;
the judging module is specifically used for generating a terminal position topological graph according to the space position information of each terminal in the satellite communication system;
according to the terminal position topological graph, respectively calculating the distance between the space position of each multiplexing terminal of the non-idle resource and the space position of the terminal to obtain a plurality of distances;
and under the condition that each distance in the plurality of distances is smaller than a preset distance threshold value, the concentration degree of the spatial position distribution between the multiplexing terminal of the non-idle resources and the terminal is larger than the preset degree threshold value.
Optionally, the determining module is specifically configured to generate a terminal position topological graph according to spatial position information of each terminal in the satellite communication system;
according to the terminal position topological graph, respectively calculating longitude differences, latitude differences and altitude differences between each multiplexing terminal of the non-idle resources and the terminal to obtain a plurality of longitude differences, a plurality of latitude differences and a plurality of altitude differences;
And under the condition that at least one of each longitude difference value is smaller than a preset longitude threshold value, each latitude difference value is smaller than a preset latitude threshold value and each altitude difference value is smaller than a preset altitude threshold value, the concentration degree of the spatial position distribution between the multiplexing terminal of the non-idle resources and the terminal is larger than the preset degree threshold value.
Optionally, the determining module is specifically configured to, when the spatial location of the non-idle resource multiplexing terminal and the spatial location of the terminal belong to the same preset area, set the concentration level of the spatial location distribution between the non-idle resource multiplexing terminal and the terminal to be greater than the preset level threshold.
Optionally, the preset resources include: a first preset resource; the first preset resources are part of the preset resources;
the determining module is configured to determine, from preset resources, that a resource satisfying a preset condition is a first target resource, where the determining module detects that a terminal bearer is established, where the determining module includes:
the determining module is specifically configured to determine, from the first preset resources, that the resource satisfying the preset condition is the first target resource, when the terminal bearer establishment is detected.
Optionally, the preset resources further include: a second preset resource; the second preset resource is a resource except the first preset resource in the preset resources;
the device further comprises a selecting module, configured to select, from the second preset resources, resources with the number of multiplexing terminals smaller than a first preset number threshold as second target resources, when the terminal random access is detected, before determining, from the first preset resources, that resources satisfying a preset condition are first target resources, when the terminal bearer establishment is detected;
transmitting the second target resource to the terminal through a satellite, so that the terminal adopts the second target resource and transmits information to the base station through the satellite; the information includes: spatial location information of the terminal.
Optionally, the apparatus further comprises: an updating module and an updating resource sending module;
the updating module is configured to determine, in the multiplexing terminal of the first target resource, that a resource satisfying the preset condition is an updated first target resource from the first preset resource when a distribution concentration degree between the updated spatial position of the terminal and spatial positions of other terminals is not greater than the preset degree threshold; the other terminals are terminals except the terminal in the multiplexing terminal of the first target resource;
And the updated resource sending module is used for sending the updated first target resource to the terminal through the satellite.
The present application also provides a storage medium including a stored program, wherein the program executes any one of the above-described resource allocation methods.
The present application also provides a satellite communication system, which is characterized by comprising: terminals, base stations, and satellites; the terminal and the base station communicate through a satellite; the base station is configured to execute any one of the above-described resource allocation methods.
In the resource allocation method, the device, the storage medium and the satellite communication system, when the base station detects that the terminal bears the connection, the base station determines the resource meeting the preset condition as the first target resource from the preset resources, and sends the first target resource to the terminal through the satellite, so that the terminal uses the first target resource to send information to the base station. The first target resource is a resource, in the preset resource, of which the concentration degree of spatial position distribution between the multiplexing terminal and the terminal is greater than a preset degree threshold value and the number of multiplexing terminals is less than a preset number threshold value.
Because the number of the current multiplexing terminals of the first target resource is smaller than the preset number threshold, the number of the current multiplexing terminals of the first target resource including the terminal is in the bearable range of the first target resource. Meanwhile, as the concentration degree of the current multiplexing terminal of the first target resource and the spatial position distribution between the terminals is larger than the preset degree threshold, the change rules of frequency offset, time delay, signal interference noise ratio and the like of information (modulation information) sent to the base station by different terminals multiplexing the first target resource (including the terminals) through the first target resource are the same, so that the problem that the accuracy of the demodulated information is poor when the base station demodulates the information carried by the first target resource by adopting the same rule due to different change rules of frequency offset, time delay and signal interference noise ratio of the information carried by different terminals carried by the first target resource is avoided. Therefore, by adopting the scheme provided by the application, the accuracy of the information obtained by demodulating the information carried by the first target resource by the base station is improved.
Drawings
In order to more clearly illustrate the embodiments of the present application or the technical solutions in the prior art, the drawings that are required in the embodiments or the description of the prior art will be briefly described below, it being obvious that the drawings in the following description are only some embodiments of the present application, and that other drawings may be obtained according to these drawings without inventive effort for a person skilled in the art.
Fig. 1 is a schematic structural diagram of a satellite communication system according to an embodiment of the present disclosure;
fig. 2 is a schematic diagram of an interaction flow between devices in the satellite communication system disclosed in the embodiment of the present application;
fig. 3 is a schematic diagram of mapping SRS resources under one RB condition disclosed in the embodiments of the present application;
fig. 4 is a flowchart of a resource allocation method disclosed in an embodiment of the present application;
fig. 5 is a schematic structural diagram of a resource allocation device according to an embodiment of the present application.
Detailed Description
The following description of the embodiments of the present application will be made clearly and fully with reference to the accompanying drawings, in which it is evident that the embodiments described are only some, but not all, of the embodiments of the present application. All other embodiments, which can be made by one of ordinary skill in the art without undue burden from the present disclosure, are within the scope of the present disclosure.
In the embodiment of the present application, the allocation of PUCCH resources and SRS resources is described by taking as an example, and of course, in practice, the resource allocation scheme of the embodiment of the present application is applicable to allocation of other resources in a satellite communication system in addition to PUCCH resources and SRS resources. The resource allocation scheme provided by the embodiment of the application can be applied to the base station in the satellite communication system. The resource allocation scheme provided by the embodiment of the application is particularly suitable for a low-orbit satellite communication system and a medium-orbit satellite communication system.
The inventors found in the study that, in the case of the position dispersion of different terminals multiplexing PUCCH resources or SRS resources, after uplink signals (uplink signals of different terminals) sent to a base station by the different terminals through multiplexing PUCCH resources and multiplexing SRS resources reach the base station, the change rules (change values and change rates) of the frequency offset, time delay and signal-to-interference-plus-noise ratio (Signal and interference noise ratio, SINR) of the uplink signals of different terminals have a large difference, resulting in a large difference between information demodulated by the base station from the multiplexed PUCCH resources and the multiplexed SRS resources and original information. Therefore, in the embodiment of the present application, spatial location distribution of different terminals multiplexing the same PUCCH resource or the same SRS resource needs to be concentrated.
In this embodiment, the base station allocates PUCCH resources and SRS resources for the terminal under the conditions of random access and bearer establishment of the terminal, where the base station has not acquired spatial location information of the terminal yet under the condition of random access of the terminal, and therefore cannot allocate PUCCH resources and SRS resources for the terminal according to the spatial location information of the terminal.
Therefore, in this embodiment, the preset PUCCH resource is divided into two parts, one part is referred to as a first preset PUCCH resource and the other part is referred to as a second preset PUCCH resource. The first preset PUCCH resource is used for the PUCCH resource allocated to the terminal under the condition of terminal bearing establishment, and the second preset PUCCH resource is used for the PUCCH resource allocated to the terminal under the condition of terminal random access. Similarly, the preset SRS resource is divided into two parts, one part is called a first preset SRS resource and the other part is called a second preset SRS resource. The first preset SRS resource is used for the SRS resource allocated to the terminal under the condition of the terminal bearing establishment, and the second preset SRS resource is used for the SRS resource allocated to the terminal under the condition of the terminal random access.
The preset PUCCH resource is a PUCCH resource in the satellite communication system, and the preset SRS resource is an SRS resource in the satellite communication system. Specifically, which resources in the preset PUCCH resources are used as the second preset PUCCH resources, and which resources in the preset SRS resources are used as the second preset SRS resources, which is not limited in this embodiment.
Fig. 2 is a schematic interaction diagram between devices in a satellite communication system according to an embodiment of the present application, including the following steps:
s201, under the condition that the base station detects the random access of the terminal, selecting PUCCH resources with the number of multiplexing terminals smaller than a first threshold value from second preset PUCCH resources as second target PUCCH resources, and selecting SRS resources with the number of multiplexing terminals smaller than a second preset number threshold value from second preset SRS resources as second target SRS resources.
In this embodiment, a multiplexing terminal of any one resource represents a terminal that has multiplexed the resource.
In the embodiment of the present application, the PUCCH resource in the satellite communication system may be a PUCCH resource in PUCCH format0 format. The PUCCH resource in PUCCH format0 may carry uplink control information not exceeding 2 bits, and may be specifically used for HARQ-ACK transmission and SR transmission. The PUCCH resource of the PUCCH format0 occupies 8-14 OFDM symbols on the time domain and occupies one RB on the frequency domain. The uplink control information with the bit not exceeding 2 bits is subjected to BPSK modulation or QPSK modulation to obtain modulation information, and the modulation information is transmitted on a CAZAC sequence, wherein the CAZAC sequence is subjected to frequency domain cyclic shift and time domain orthogonal spread spectrum. Among them, there are 12 cyclic shifts and 4 to 7 orthogonal spreading codes, so that one PUCCH resource of PUCCH format0 format supports 84 terminal multiplexing at most.
Therefore, in this step, the base station selects the second target PUCCH resource from the second preset PUCCH resources, and only the number of multiplexing terminals of the selected second target PUCCH resource is required to be smaller than the first threshold, that is, the total number of the terminals and the current multiplexing terminals of the second target PUCCH resource may be within the bearable range of the second target PUCCH resource, for example, the total number of terminals in which one PUCCH resource may be multiplexed is 84, the value of the first threshold may be set to 83, the first threshold may be determined according to the actual situation, and this embodiment does not limit the specific value of the first threshold.
In the embodiment of the present application, when a plurality of terminals multiplex one SRS resource, the SRS resource may be multiplexed by TDM, FDM, CDM, or the like. Specifically, the embodiment describes multiplexing forms of TDM, FDM and CDM by taking the example of occupying one RB in the frequency domain, and specifically, a mapping schematic diagram of SRS resources occupying one RB in the frequency domain is shown in fig. 3. In fig. 3, the horizontal axis represents the time domain, the vertical axis represents the frequency domain, and fig. 3 shows SRS resources available to the terminal, namely SRS resource 1, SRS resource 2 and SRS resource 3. From fig. 3, it can be seen that SRS resource 1 and SRS resource 2 are frequency division multiplexed, and SRS resource 2 and SRS resource 3 are time division multiplexed. Any one of the SRS resource 1, the SRS resource 2 and the SRS resource 3 may be subjected to code division multiplexing by a cyclic shift manner, where the number of cyclic shifts may be 8, and of course, the number of cyclic shifts may also be other values, and the number of cyclic shifts is not limited in this embodiment.
In the case of time division multiplexing, the resources occupied by one SRS in the time domain may be 1, 2, and 4 OFDM symbols.
According to the time division multiplexing, the frequency division multiplexing and the code division multiplexing, the total number of terminals in which one SRS resource can be multiplexed can be calculated, and in this step, the value of the second preset number threshold does not exceed 49, assuming that the total number of terminals in which one SRS resource can be multiplexed is 50.
S202, the base station sends the second target PUCCH resource and the second target SRS resource to the terminal through the satellite.
Specifically, the base station transmits the second target PUCCH resource and the second target SRS resource to the satellite, and the satellite forwards the second target PUCCH resource and the second target SRS resource to the terminal.
And S203, the terminal transmits information to the base station through the satellite based on the second target PUCCH resource and the second target SRS resource.
In this step, the information sent by the terminal to the base station through the satellite includes: spatial location information of the terminal. Specifically, the spatial location information of the terminal may include: at least one of longitude, latitude, and altitude.
S204, under the condition that the base station detects that the terminal bearing is established, determining the PUCCH resource meeting the preset condition as a first target PUCCH resource from the first preset PUCCH resource.
In this embodiment, when detecting that the terminal bearer is established, the base station needs to reallocate PUCCH resources and SRS resources to the terminal. Specifically, the base station determines, from the first preset PUCCH resources, PUCCH resources satisfying the preset condition as PUCCH resources reallocated to the terminal, and for convenience of description, the PUCCH resources satisfying the preset condition determined from the first preset PUCCH resources are referred to as first target PUCCH resources.
The first preset PUCCH resource is a PUCCH resource except the second preset PUCCH resource in the preset PUCCH resources.
The preset conditions comprise: and (3) idling, or the concentration degree of the spatial position distribution between the multiplexing terminals and the terminals is larger than a preset degree threshold value and the number of the multiplexing terminals is smaller than a second threshold value. Wherein the idle resources are resources which are not multiplexed by the terminal. In this step, if the number of terminals to which one PUCCH resource is multiplexed at most is 84, the value of the second threshold is not greater than 83, as long as the total number of multiplexed terminals and terminals does not exceed the maximum value of the number of terminals that can be carried by one PUCCH resource. Specifically, the value of the second threshold may be determined according to an actual situation, and the specific value of the second threshold is not limited in this embodiment.
Specifically, in this step, the following three methods are included in the determination as to whether the concentration degree of the spatial position distribution between the multiplexing terminal of any one of the first preset PUCCH resources and the terminal is greater than the preset degree threshold. The non-idle PUCCH resources in the first preset PUCCH resources are PUCCH resources except idle PUCCH resources in the first preset PUCCH resources.
The specific implementation process of the first mode may include steps A1 to A3:
a1, establishing a terminal position topological graph according to the space position information of each terminal in the satellite communication system.
Since in this embodiment the spatial location information of the terminal through the bearer establishment procedure in the satellite communication system is acquired by the base station. Therefore, the base station can determine the position of the terminal in a preset space coordinate system according to the space position information of each terminal in the satellite communication system, and a terminal position topological graph is obtained.
A2, respectively calculating the distance between each terminal and the terminal of which the non-idle PUCCH resources are multiplexed, and obtaining a plurality of distances.
Specifically, the distance in this step may be a euclidean distance, and of course, in reality, other distances may be also used, and the specific form of the distance is not limited in this embodiment.
A3, under the condition that each distance in the plurality of distances is smaller than a preset distance threshold value, the concentration degree of the spatial position distribution between the multiplexing terminal of the non-idle PUCCH resource and the terminal is larger than a preset degree threshold value.
The specific implementation process of the second mode can comprise the steps of B1 to B3:
b1, establishing a terminal position topological graph according to the space position information of each terminal in the satellite communication system.
The specific implementation process of this step may refer to A1, and will not be described herein.
And B2, respectively calculating longitude differences, latitude differences and altitude differences between each terminal to which the non-idle resource PUCCH has been multiplexed and the terminal according to the terminal position topological graph to obtain a plurality of longitude differences, a plurality of latitude differences and a plurality of altitude differences.
B3, under the condition that at least one of each longitude difference value is smaller than a preset longitude threshold value, each latitude difference value is smaller than a preset latitude threshold value and each altitude difference value is smaller than a preset altitude threshold value, the concentration degree of the spatial position distribution between the multiplexing terminal of the non-idle resources and the terminal is larger than a preset degree threshold value.
In practice, the more terms that are established in each longitude difference value is smaller than a preset longitude threshold value, each latitude difference value is smaller than a preset latitude threshold value, and each altitude difference value is smaller than a preset altitude threshold value, the higher the accuracy that the concentration degree of the spatial position distribution between the multiplexing terminal of the non-idle resource and the terminal is larger than the preset degree threshold value is indicated.
The specific implementation process of the third mode may include: and under the condition that the spatial position of the multiplexing terminal of the non-idle resource and the spatial position of the terminal belong to the same preset area, the concentration degree of the spatial position distribution between the multiplexing terminal of the non-idle resource and the terminal is larger than a preset degree threshold.
Specifically, in this manner, the coverage area of the satellite signal on the ground is divided in advance, so that the concentration degree of the spatial position distribution of the terminal located in any divided area is ensured to be greater than a preset degree threshold. The present embodiment is not limited to how to divide the coverage area of the satellite signal on the ground.
S205, the base station determines that the SRS resource meeting the preset condition is a first target SRS resource from first preset SRS resources under the condition that the base station detects that the terminal bearing is established.
The first preset SRS resource is an SRS resource except the second preset SRS resource in the preset SRS resources.
The preset conditions comprise: and (3) idling, or the concentration degree of the spatial position distribution between the multiplexing terminals and the terminals is larger than a preset degree threshold value and the number of the multiplexing terminals is smaller than a preset number threshold value.
Specifically, the determining manner of whether the concentration degree of the spatial position distribution between the multiplexing terminal of any one of the first preset SRS resources and the terminal is greater than the preset degree threshold may refer to the determining manner of any one of the first preset PUCCH resources, which is not described herein.
In the present embodiment, the execution order of S204 and S205 may be interchanged, or may be executed simultaneously, that is, the execution order of the two steps S204 and S205 is not limited in the present embodiment.
S206, the base station sends the first target PUCCH resource and the first target SRS resource to the terminal through the satellite.
In this step, the base station may transmit the first target PUCCH resource and the first target SRS resource to the terminal through the satellite in the form of RRC signaling or DCI configuration information. Specifically, when the PUCCH resource is used for SR transmission, an RRC signaling manner is adopted, and when the PUCCH resource is used for HARQ-ACK transmission, a DCI configuration information manner is adopted.
S207, the terminal adopts the first target PUCCH resource and the first target SRS resource to send uplink control information to the satellite.
S208, the satellite transmits uplink control information to the base station.
S209, the base station demodulates the uplink control information in the first target PUCCH resource and the first target SRS resource.
S210, in the case of updating the spatial location information of the terminal, the terminal transmits the updated spatial location information to the satellite.
Specifically, the manner in which the terminal sends the updated spatial location information to the satellite is in the prior art, which is not described herein.
S211, the satellite sends the updated space position information of the terminal to the base station.
S212, the base station updates the terminal position topological graph according to the updated spatial position information of the terminal.
S213, the base station judges whether the distribution concentration degree between the updated spatial position of the terminal and the spatial positions of other terminals in the multiplexing terminal of the first target PUCCH resource is larger than a preset degree threshold, if not, S214 is executed, and if so, S215 is executed.
Specifically, in this step, the manner of determining whether the distribution concentration degree between the spatial position updated by the terminal and the spatial positions of other terminals in the multiplexing terminal of the first target PUCCH resource is greater than the preset degree threshold may refer to S204, which is not described herein again.
In this step, the other terminals are terminals other than the terminal among the terminals multiplexing the first target PUCC resource.
S214, the base station determines that the PUCCH resource meeting the preset condition is the updated first target PUCCH resource from the first preset PUCCH resource.
Specifically, in this step, the principle that the base station determines the PUCCH resource satisfying the preset condition from the first preset PUCCH resource may refer to S204, which is not described herein.
S215, the base station judges whether the distribution concentration degree between the updated spatial position of the terminal and the spatial positions of other terminals in the multiplexing terminal of the first target SRS resource is larger than a preset degree threshold value, if not, S216 is executed, and if so, the terminal is ended.
In this step, the meaning of the other terminals is the same as that of the other terminals in S213, and will not be described here.
Specifically, in this step, the manner of determining whether the distribution concentration degree between the spatial position updated by the terminal and the spatial positions of other terminals in the multiplexing terminal of the first target SRS resource is greater than the preset degree threshold may refer to S205, which is not described herein again.
The execution sequences of S213 and S215 may be interchanged, that is, the base station may first determine whether the distribution concentration degree between the spatial position updated by the terminal and the spatial positions of other terminals in the multiplexing terminal of the first target SRS resource is greater than the preset degree threshold, if not, S216 is executed, if yes, the base station determines whether the distribution concentration degree between the spatial position updated by the terminal and the spatial positions of other terminals in the multiplexing terminal of the first target PUCCH resource is greater than the preset degree threshold, if not, S214 is executed, and if yes, S is ended.
The above-described S213 and S215 may also be performed simultaneously, and if the determination result of S213 is no, S214 is performed, and if the determination result of S215 is no, S216 is performed.
S216, the base station determines that the SRS resource meeting the preset condition is the updated first target SRS resource from the first preset SRS resource.
Specifically, in this step, the principle that the base station determines the PUCCH resource satisfying the preset condition from the first preset PUCCH resource may refer to S105, which is not described herein.
S217, the base station sends the updated first target PUCCH resource and the updated first target SRS resource to the terminal through the satellite.
In this step, after the base station transmits the updated first target PUCCH resource and the updated first target SRS resource to the terminal through the satellite, the terminal subsequently transmits information to the base station by using the updated first target PUCCH resource and the updated first target SRS resource.
The embodiment has the following beneficial effects:
has the beneficial effects that,
In this embodiment, since the number of the current multiplexing terminals of the first target resource is smaller than the preset number threshold, the number of the current multiplexing terminals of the first target resource is within the loadable range of the first target resource. Meanwhile, as the concentration degree of the spatial position distribution between the current multiplexing terminal of the first target resource and the terminal is larger than the preset degree threshold, the change rules of frequency offset, time delay, signal interference noise ratio and the like of the information (modulation information) sent to the base station by different terminals multiplexing the first target resource through the first target resource are the same, so that the problem that the accuracy of the demodulated information is poor when the base station demodulates the information carried by the first target resource by adopting the same rules due to different change rules of frequency offset, time delay and signal interference noise ratio of the information carried by different terminals carried by the first target resource is avoided. Therefore, by adopting the scheme provided by the embodiment, the accuracy of the information obtained by demodulating the information carried by the first target resource by the base station is improved.
Has the beneficial effects of,
In this embodiment, since the base station has not acquired the spatial location information of the terminal yet under the random access condition of the terminal, and cannot allocate resources (PUCCH resources and SRS resources) with a concentration degree of spatial location distribution between the multiplexing terminal and the terminal greater than a preset degree threshold for the terminal, the preset resources are divided into two parts, namely a first preset resource and a second preset resource, and under the random access condition of the terminal, the resources are allocated to the terminal from the second preset resource, wherein the spatial location information of the terminal does not need to be considered in the allocation process. In the process of establishing the terminal bearing, selecting resources for the terminal from the first preset resources, and considering the spatial position information of the terminal in the selecting process, so that the distribution concentration degree among the spatial positions of the multiplexing terminals (including the terminal) of the resources allocated for the terminal is larger than a preset degree threshold. In summary, this embodiment may not only satisfy that the concentration degree of spatial location distribution between multiplexing terminals (including the terminals) is greater than a preset degree threshold when the terminal bearer is established, but also ensure that resources may be allocated to the terminals in the terminal random access process.
Fig. 4 is a method for allocating resources according to an embodiment of the present application, including the following steps:
s401, under the condition that the establishment of the terminal bearing is detected, determining the resource meeting the preset condition as a first target resource from preset resources.
The preset conditions comprise: the concentration degree of the spatial position distribution between the multiplexing terminals is larger than a preset degree threshold value, and the number of the multiplexing terminals is smaller than a preset number threshold value.
The multiplexing terminal of any one of the preset resources is a terminal which has multiplexed the resources.
Specifically, the process of determining the resource satisfying the preset condition from the preset resources may refer to the corresponding embodiment of fig. 1, which is not described herein.
S402, the first target resource is sent to the terminal through the satellite.
In this step, after the first target resource is transmitted to the terminal through the satellite, the terminal transmits information to the base station by using the first target resource.
Fig. 5 is a resource allocation apparatus provided in an embodiment of the present application, including: a determining module 501 and a transmitting module 502.
The determining module 501 is configured to determine, when detecting that the terminal bearer is established, that a resource satisfying a preset condition is a first target resource from preset resources, where the preset condition includes: the concentration degree of the spatial position distribution between the multiplexing terminals is larger than a preset degree threshold value, the number of the multiplexing terminals is smaller than a preset number threshold value, and the multiplexing terminal of any one resource in the preset resources is a terminal which has multiplexed the resource. The sending module 502 is configured to send the first target resource to the terminal through the satellite, so that the terminal sends information to the base station by using the first target resource.
Optionally, the apparatus further comprises: the determining module 503 is configured to determine whether a concentration degree of spatial location distribution between the multiplexing terminal and the terminal of any non-idle resource in the preset resources is greater than a preset degree threshold.
The determining module 503 is specifically configured to generate a terminal position topology map according to spatial position information of each terminal in the satellite communication system, and calculate distances between a spatial position of each multiplexing terminal of the non-idle resource and a spatial position of the terminal according to the terminal position topology map, so as to obtain a plurality of distances, where a concentration degree of spatial position distribution between the multiplexing terminal of the non-idle resource and the terminal is greater than a preset degree threshold when each distance in the plurality of distances is less than a preset distance threshold.
Optionally, the determining module 503 is further specifically configured to generate a terminal position topological graph according to spatial position information of each terminal in the satellite communication system, and calculate, according to the terminal position topological graph, a longitude difference value, a latitude difference value, and an altitude difference value between each multiplexing terminal and the terminal of the non-idle resource, to obtain a plurality of longitude difference values, a plurality of latitude difference values, and a plurality of altitude difference values, where each longitude difference value is smaller than a preset longitude threshold value, each latitude difference value is smaller than a preset latitude threshold value, and each altitude difference value is smaller than at least one of the preset altitude threshold values, and the concentration degree of spatial position distribution between the multiplexing terminal and the terminal of the non-idle resource is greater than a preset degree threshold value.
Optionally, the determining module 503 is further specifically configured to, in a case where the spatial location of the multiplexing terminal of the non-idle resource and the spatial location of the terminal belong to the same preset area, make the concentration degree of the spatial location distribution between the multiplexing terminal of the non-idle resource and the terminal greater than a preset degree threshold.
Optionally, the preset resources include: the first preset resource is a part of resources preset in the preset resources.
The determining module 501 is configured to determine, from preset resources, that a resource satisfying a preset condition is a first target resource when detecting that a terminal bearer is established, where the determining module includes: the determining module 501 is specifically configured to determine, from the first preset resources, that a resource satisfying a preset condition is a first target resource, when it is detected that the terminal bearer is established.
Optionally, the preset resources further include: the second preset resource is a resource except the first preset resource in the preset resources.
The apparatus further includes a selecting module 504, configured to select, from the second preset resources, resources with a number of multiplexing terminals less than a first preset number threshold as second target resources, in the case of detecting random access of the terminal, before determining, from the first preset resources, that resources satisfying the preset condition are first target resources in the case of detecting establishment of a bearer of the terminal; the second target resource is sent to the terminal through the satellite, so that the terminal adopts the second target resource and sends information to the base station through the satellite, wherein the information comprises: spatial location information of the terminal.
Optionally, the apparatus further comprises: an update module 505 and an update resource transmission module 506.
The updating module 505 is configured to, after sending the first target resource to the terminal through the satellite, receive information about spatial location update sent by the terminal, and determine, in the multiplexed terminal of the first target resource, that a resource satisfying a preset condition is an updated first target resource from the first preset resource if a distribution concentration degree between the spatial location after the update of the terminal and the spatial locations of other terminals is not greater than a preset degree threshold, where the other terminals are terminals except the terminal in the multiplexed terminal of the first target resource.
And the updated resource sending module 506 is configured to send the updated first target resource to the terminal through the satellite.
The embodiment of the application also provides a storage medium, which comprises a stored program, wherein the program executes any one of the resource allocation methods.
The embodiment of the application also provides a satellite communication system, which comprises: the base station is used for executing any one of the resource allocation methods.
The functions described in the methods of the present application, if implemented in the form of software functional units and sold or used as a stand-alone product, may be stored in a computing device readable storage medium. Based on such understanding, a portion of the embodiments of the present application that contributes to the prior art or a portion of the technical solution may be embodied in the form of a software product stored in a storage medium, comprising several instructions for causing a computing device (which may be a personal computer, a server, a mobile computing device or a network device, etc.) to perform all or part of the steps of the methods described in the embodiments of the present application. And the aforementioned storage medium includes: a U-disk, a removable hard disk, a Read-Only Memory (ROM), a random access Memory (RAM, random Access Memory), a magnetic disk, or an optical disk, or other various media capable of storing program codes.
In this specification, each embodiment is described in a progressive manner, and each embodiment is mainly described in a different point from other embodiments, so that the same or similar parts between the embodiments are referred to each other.
The previous description of the disclosed embodiments is provided to enable any person skilled in the art to make or use the present application. Various modifications to these embodiments will be readily apparent to those skilled in the art, and the generic principles defined herein may be applied to other embodiments without departing from the spirit or scope of the application. Thus, the present application is not intended to be limited to the embodiments shown herein but is to be accorded the widest scope consistent with the principles and novel features disclosed herein.

Claims (11)

1. A method for allocating resources, applied to a base station in a satellite communication system, comprising:
under the condition that the establishment of the terminal bearing is detected, determining the resource meeting the preset condition as a first target resource from preset resources; the preset conditions include: idle, or the concentration degree of the spatial position distribution between the multiplexing terminal and the terminal is greater than a preset degree threshold value and the number of the multiplexing terminals is less than a preset number threshold value; the multiplexing terminal of any one of the preset resources is a terminal which has multiplexed the resources;
transmitting the first target resource to the terminal through a satellite; and enabling the terminal to send information to the base station by adopting the first target resource.
2. The method according to claim 1, wherein the determining whether the concentration degree of the spatial location distribution between the multiplexing terminal of any non-idle resource in the preset resources and the terminal is greater than the preset degree threshold value includes:
generating a terminal position topological graph according to the space position information of each terminal in the satellite communication system;
according to the terminal position topological graph, respectively calculating the distance between the space position of each multiplexing terminal of the non-idle resource and the space position of the terminal to obtain a plurality of distances;
And under the condition that each distance in the plurality of distances is smaller than a preset distance threshold value, the concentration degree of the spatial position distribution between the multiplexing terminal of the non-idle resources and the terminal is larger than the preset degree threshold value.
3. The method of claim 1, wherein the spatial location information of any one terminal comprises: at least one of longitude, latitude, and altitude;
the determining mode of whether the concentration degree of the spatial position distribution between the multiplexing terminal of any non-idle resource in the preset resources and the terminal is greater than the preset degree threshold value comprises the following steps:
generating a terminal position topological graph according to the space position information of each terminal in the satellite communication system;
according to the terminal position topological graph, respectively calculating longitude differences, latitude differences and altitude differences between each multiplexing terminal of the non-idle resources and the terminal to obtain a plurality of longitude differences, a plurality of latitude differences and a plurality of altitude differences;
and under the condition that at least one of each longitude difference value is smaller than a preset longitude threshold value, each latitude difference value is smaller than a preset latitude threshold value and each altitude difference value is smaller than a preset altitude threshold value, the concentration degree of the spatial position distribution between the multiplexing terminal of the non-idle resources and the terminal is larger than the preset degree threshold value.
4. The method according to claim 1, wherein the determining whether the concentration degree of the spatial location distribution between the multiplexing terminal of any non-idle resource in the preset resources and the terminal is greater than the preset degree threshold value includes:
and under the condition that the spatial position of the multiplexing terminal of the non-idle resource and the spatial position of the terminal belong to the same preset area, the concentration degree of the spatial position distribution between the multiplexing terminal of the non-idle resource and the terminal is larger than the preset degree threshold.
5. The method according to any one of claims 1-4, wherein the preset resources include: a first preset resource; the first preset resources are part of the preset resources;
under the condition that the establishment of the terminal bearing is detected, determining the resource meeting the preset condition as a first target resource from preset resources comprises the following steps:
and under the condition that the terminal bearing establishment is detected, determining the resource meeting the preset condition as the first target resource from the first preset resource.
6. The method of claim 5, wherein the preset resources further comprise: a second preset resource; the second preset resource is a resource except the first preset resource in the preset resources;
And before determining that the resource meeting the preset condition is the first target resource from the first preset resource under the condition that the terminal bearing establishment is detected, the method further comprises the following steps:
under the condition that the random access of the terminal is detected, selecting resources with the number of multiplexing terminals smaller than a first preset number threshold value from the second preset resources as second target resources;
transmitting the second target resource to the terminal through a satellite, so that the terminal adopts the second target resource and transmits information to the base station through the satellite; the information includes: spatial location information of the terminal.
7. The method of claim 6, further comprising, after said transmitting the first target resource to the terminal via satellite:
in the multiplexing terminal of the first target resource, when the distribution concentration degree between the spatial position updated by the terminal and the spatial positions of other terminals is not greater than the preset degree threshold value, determining that the resource meeting the preset condition is the updated first target resource from the first preset resource; the other terminals are terminals except the terminal in the multiplexing terminal of the first target resource;
And sending the updated first target resource to the terminal through the satellite.
8. The method of claim 7, wherein the resources comprise PUCCH resources and SRS resources.
9. A resource allocation apparatus for use in a base station in a satellite communication system, comprising:
the determining module is used for determining resources meeting preset conditions as first target resources from preset resources under the condition that the establishment of the terminal bearing is detected; the preset conditions include: idle, or the concentration degree of the spatial position distribution between the multiplexing terminal and the terminal is greater than a preset degree threshold value and the number of the multiplexing terminals is less than a preset number threshold value; the multiplexing terminal of any one of the preset resources is a terminal which has multiplexed the resources;
the sending module is used for sending the first target resource to the terminal through a satellite; and enabling the terminal to send information to the base station by adopting the first target resource.
10. A storage medium comprising a stored program, wherein the program performs the resource allocation method of any one of claims 1-8.
11. A satellite communications system, comprising: terminals, base stations, and satellites;
the terminal and the base station communicate through a satellite;
the base station is configured to perform the resource allocation method according to any of the preceding claims 1-8.
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