CN115002919B - Channel resource allocation method and device in low-orbit satellite system - Google Patents
Channel resource allocation method and device in low-orbit satellite systemDownload PDFInfo
- Publication number
- CN115002919B CN115002919BCN202210829897.3ACN202210829897ACN115002919BCN 115002919 BCN115002919 BCN 115002919BCN 202210829897 ACN202210829897 ACN 202210829897ACN 115002919 BCN115002919 BCN 115002919B
- Authority
- CN
- China
- Prior art keywords
- random access
- access channel
- low
- different
- orbit satellite
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Active
Links
Images
Classifications
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W72/00—Local resource management
- H04W72/04—Wireless resource allocation
- H04W72/044—Wireless resource allocation based on the type of the allocated resource
- H04W72/0453—Resources in frequency domain, e.g. a carrier in FDMA
- 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
- H04B7/18513—Transmission in a satellite or space-based system
- 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
- H04B7/18517—Transmission equipment in earth stations
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W72/00—Local resource management
- H04W72/04—Wireless resource allocation
- H04W72/044—Wireless resource allocation based on the type of the allocated resource
- H04W72/0446—Resources in time domain, e.g. slots or frames
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W74/00—Wireless channel access
- H04W74/08—Non-scheduled access, e.g. ALOHA
- H04W74/0833—Random access procedures, e.g. with 4-step access
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W84/00—Network topologies
- H04W84/02—Hierarchically pre-organised networks, e.g. paging networks, cellular networks, WLAN [Wireless Local Area Network] or WLL [Wireless Local Loop]
- H04W84/04—Large scale networks; Deep hierarchical networks
- H04W84/06—Airborne or Satellite Networks
- 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
Landscapes
- Engineering & Computer Science (AREA)
- Computer Networks & Wireless Communication (AREA)
- Signal Processing (AREA)
- Physics & Mathematics (AREA)
- Astronomy & Astrophysics (AREA)
- General Physics & Mathematics (AREA)
- Aviation & Aerospace Engineering (AREA)
- Radio Relay Systems (AREA)
Abstract
Description
Translated fromChinese技术领域technical field
本公开涉及通信技术领域，具体涉及低轨卫星系统中信道资源分配方法及装置。The present disclosure relates to the technical field of communications, and in particular to a channel resource allocation method and device in a low-orbit satellite system.
背景技术Background technique
地面终端和低轨卫星之间的相对速度远远大于地面蜂窝系统研究的速度上限，例如高铁的500km/h速度是4G、5G系统支持的最大系统，而低轨卫星的速度是这个最高时速的50倍。这对通信链路来讲意味着极大的多普勒频移（Doppler Shift）。进一步恶化的因素还在于低轨卫星使用的载波频率较高，例如Ka波段载波频率在20GHz和30GHz之间，由于多普勒频移等于
多个地面终端在随机接入信道上发送不同的随机接入导频。不同的随机接入导频之间可以是不同的根序列（Root Sequence）或使用不同的循环移位（Cyclic Shift）。一般而言，使用不同的根序列的导频序列之间为非准正交，而使用相同根序列不同循环移位的序列之间彼此正交。在长期演进（Long Time Evolution，LTE）系统中一个随机接入信道支持最多64个不同的随机接入序列，并根据小区半径的大小对应到不同的根序列数量和循环移位数量。然而，使用不同循环移位的序列之间的正交性会随着多普勒频移的增加而降低。在低轨卫星通信系统中，随机接入信道中的两个序列如果存在较大的多普勒频移差，将意味着序列之间的干扰，并且增加接收机序列搜索的难度。Multiple ground terminals transmit different random access pilots on the random access channel. Different random access pilots may use different root sequences (Root Sequence) or use different cyclic shifts (Cyclic Shift). Generally speaking, pilot sequences using different root sequences are non-quasi-orthogonal, while sequences using the same root sequence but with different cyclic shifts are orthogonal to each other. In a Long Time Evolution (LTE) system, a random access channel supports up to 64 different random access sequences, and corresponds to different numbers of root sequences and cyclic shifts according to the size of the cell radius. However, the orthogonality between sequences using different cyclic shifts decreases with increasing Doppler shift. In the low orbit satellite communication system, if there is a large Doppler frequency shift difference between the two sequences in the random access channel, it will mean the interference between the sequences and increase the difficulty of the receiver sequence search.
发明内容Contents of the invention
为了解决相关技术中的问题，本公开实施例提供了一种低轨卫星系统中信道资源分配方法、装置、设备及可读存储介质。In order to solve the problems in related technologies, the embodiments of the present disclosure provide a channel resource allocation method, device, equipment and readable storage medium in a low-orbit satellite system.
第一方面，本公开实施例中提供了低轨卫星系统中信道资源分配方法，包括：In the first aspect, an embodiment of the present disclosure provides a channel resource allocation method in a low-orbit satellite system, including:
为低轨卫星配置至少两个随机接入信道资源；Configure at least two random access channel resources for low-orbit satellites;
向低轨卫星波束覆盖区域内的地面终端发送至少两个随机接入信道资源的配置信息，以使地面终端选择使用其中一个随机接入信道资源，并且使用同一随机接入信道资源的不同地面终端之间的信号，相比使用不同随机接入信道资源的不同地面终端之间的信号所遭受的多普勒频移差值更小。Send the configuration information of at least two random access channel resources to the ground terminal within the beam coverage area of the low-orbit satellite, so that the ground terminal chooses to use one of the random access channel resources, and different ground terminals using the same random access channel resource The Doppler frequency shift difference suffered by signals between different ground terminals using different random access channel resources is smaller.
可选地，向低轨卫星波束覆盖区域内的地面终端发送至少两个随机接入信道资源的配置信息，包括：Optionally, sending configuration information of at least two random access channel resources to the ground terminal within the beam coverage area of the low-orbit satellite, including:
通过广播信号向低轨卫星波束覆盖区域内的地面终端发送随机接入信道资源的配置信息。The configuration information of the random access channel resource is sent to the ground terminal within the beam coverage area of the low-orbit satellite through the broadcast signal.
可选地，至少两个随机接入信道资源占用不同的时间和/或频率资源；或者，至少两个随机接入信道资源使用相同的时间和/或频率资源，且不同随机接入信道的随机接入导频使用不同的根序列。Optionally, at least two random access channel resources occupy different time and/or frequency resources; or, at least two random access channel resources use the same time and/or frequency resources, and the random access channel resources of different random access channels Access pilots use different root sequences.
可选地，使用同一随机接入信道资源的不同地面终端之间的距离小于预设阈值。Optionally, the distance between different ground terminals using the same random access channel resource is smaller than a preset threshold.
可选地，还包括：Optionally, also include:
接收到多个地面终端在至少两个随机接入信道资源上发送的重叠的随机接入导频序列后，基于频率搜索的方式检测多个地面终端的随机接入导频。After receiving overlapping random access pilot sequences sent by multiple ground terminals on at least two random access channel resources, the random access pilots of multiple ground terminals are detected based on frequency search.
可选地，还包括：Optionally, also include:
向地面终端发送预先设置的距离阈值，以便地面终端根据与低轨卫星的相对距离与距离阈值之间的大小关系选择使用至少两个随机接入信道资源中的其中一个；或者，在不同时间发送携带有不同标识的广播信号，以便地面终端根据首次接收到广播信号中的标识选择使用至少两个随机接入信道资源中的其中一个。Send a preset distance threshold to the ground terminal, so that the ground terminal can choose to use one of at least two random access channel resources according to the size relationship between the relative distance to the low-orbit satellite and the distance threshold; or, send at different times Broadcast signals carrying different identifiers, so that the ground terminal selects to use one of at least two random access channel resources according to the identifier in the broadcast signal received for the first time.
可选地，距离阈值根据低轨卫星广播的波束方向和波束服务区域设置。Optionally, the distance threshold is set according to the beam direction and beam service area of the low-orbit satellite broadcast.
可选地，标识为帧或者超级帧的编号。Optionally, the identifier is the number of a frame or a superframe.
可选地，还包括：Optionally, also include:
接收地面终端使用相应随机接入信道资源发送的信号，接收到信号后，先对至少两个随机接入信道的信号使用对应的预补偿值进行预补偿，再进行随机接入导频检测；或者，向覆盖区域内的地面终端发送不同的预补偿值，以使地面终端对使用不同随机接入信道资源发送的信号采用不同的预补偿值进行预补偿。Receiving the signal sent by the ground terminal using the corresponding random access channel resources, after receiving the signal, first performing pre-compensation on the signals of at least two random access channels using the corresponding pre-compensation value, and then performing random access pilot detection; or , sending different precompensation values to ground terminals in the coverage area, so that the ground terminals use different precompensation values to perform precompensation on signals sent using different random access channel resources.
可选地，预补偿值根据地面终端与低轨卫星的距离确定。Optionally, the pre-compensation value is determined according to the distance between the ground terminal and the low-orbit satellite.
第二方面，本公开实施例中提供了一种低轨卫星系统的信道资源分配方法，包括：In the second aspect, an embodiment of the present disclosure provides a channel resource allocation method for a low-orbit satellite system, including:
接收覆盖当前区域的低轨卫星的配置信息，配置信息中包括至少两个随机信道接入资源信息；Receive configuration information of low-orbit satellites covering the current area, where the configuration information includes at least two random channel access resource information;
选择至少两个随机接入信道资源中的一个进行随机接入；其中，与使用同一随机接入信道资源的其他地面终端之间的信号，相比使用不同随机接入信道资源的地面终端之间的信号所遭受的多普勒频移差值更小。Select one of at least two random access channel resources for random access; wherein, compared with signals between other ground terminals using the same random access channel resource, compared with signals between ground terminals using different random access channel resources The signal suffers a smaller Doppler shift difference.
可选地，至少两个随机接入信道资源占用不同的时间和/或频率资源；或者，至少两个随机接入信道资源使用相同的时间和/或频率资源，且不同随机接入信道的随机接入导频使用不同的根序列。Optionally, at least two random access channel resources occupy different time and/or frequency resources; or, at least two random access channel resources use the same time and/or frequency resources, and the random access channel resources of different random access channels Access pilots use different root sequences.
可选地，选择至少两个随机接入信道资源中的一个，包括：Optionally, selecting one of at least two random access channel resources includes:
获取低轨卫星配置的距离阈值，确定与低轨卫星的相对距离，根据相对距离与距离阈值之间的大小关系选择使用至少两个随机接入信道资源中的一个；或者，接收低轨卫星的广播信号并获取其中配置的标识，根据首次接收到广播信号中的标识选择至少两个随机接入信道资源中一个。Obtain the distance threshold configured by the low-orbit satellite, determine the relative distance to the low-orbit satellite, and select to use one of at least two random access channel resources according to the size relationship between the relative distance and the distance threshold; or, receive the low-orbit satellite Broadcast the signal and acquire the identifier configured therein, and select one of at least two random access channel resources according to the identifier in the broadcast signal received for the first time.
可选地，距离阈值根据低轨卫星广播的波束方向和波束服务区域设置。Optionally, the distance threshold is set according to the beam direction and beam service area of the low-orbit satellite broadcast.
可选地，确定与低轨卫星的相对距离，包括：根据卫星定位系统确定自身位置；通过星历数据确定低轨卫星的当前位置；根据自身位置和低轨卫星的当前位置，确定与低轨卫星的相对距离。Optionally, determining the relative distance to the low-orbit satellite includes: determining its own position according to the satellite positioning system; determining the current position of the low-orbit satellite through ephemeris data; The relative distance of the satellite.
可选地，在选择至少两个随机接入信道资源中的一个进行随机接入之前，还包括：从覆盖当前区域的低轨卫星接收预补偿值，至少两个随机接入信道资源对应的预补偿值不同；使用预补偿值调整随机接入导频后发送。Optionally, before selecting one of the at least two random access channel resources for random access, it also includes: receiving a precompensation value from a low-orbit satellite covering the current area, and the precompensation value corresponding to the at least two random access channel resources The compensation value is different; the random access pilot is sent after adjusting the precompensation value.
第三方面，本公开实施例中提供了一种低轨卫星系统的信道资源分配装置，包括：In a third aspect, an embodiment of the present disclosure provides a channel resource allocation device for a low-orbit satellite system, including:
配置模块，被配置为为低轨卫星配置至少两个随机接入信道资源；The configuration module is configured to configure at least two random access channel resources for the low-orbit satellite;
第一发送模块，被配置为向低轨卫星波束覆盖区域内的地面终端发送至少两个随机接入信道资源的配置信息，以使地面终端选择使用其中一个随机接入信道资源，并且使用同一随机接入信道资源的不同地面终端之间的信号，相比使用不同随机接入信道资源的不同地面终端之间的信号所遭受的多普勒频移差值更小。The first sending module is configured to send the configuration information of at least two random access channel resources to the ground terminal within the beam coverage area of the low-orbit satellite, so that the ground terminal chooses to use one of the random access channel resources, and uses the same random access channel resource. The difference in Doppler frequency shift suffered by signals between different ground terminals accessing channel resources is smaller than that of signals between different ground terminals using different random access channel resources.
可选地，至少两个随机接入信道资源占用不同的时间和/或频率资源；或者，至少两个随机接入信道资源使用相同的时间和/或频率资源，且不同随机接入信道的随机接入导频使用不同的根序列。Optionally, at least two random access channel resources occupy different time and/or frequency resources; or, at least two random access channel resources use the same time and/or frequency resources, and the random access channel resources of different random access channels Access pilots use different root sequences.
可选地，还包括：Optionally, also include:
第二发送模块，被配置为向地面终端发送预先设置的距离阈值，以便地面终端根据与低轨卫星的相对距离与距离阈值之间的大小关系选择使用至少两个随机接入信道资源中的其中一个；The second sending module is configured to send a preset distance threshold to the ground terminal, so that the ground terminal selects to use one of the at least two random access channel resources according to the relative distance from the low-orbit satellite and the distance threshold. One;
第三发送模块，被配置为在不同时间发送携带有不同标识的广播信号，以便地面终端根据首次接收到广播信号中的标识选择使用至少两个随机接入信道资源中的其中一个。The third sending module is configured to send broadcast signals carrying different identifiers at different times, so that the ground terminal selects to use one of at least two random access channel resources according to the identifier in the broadcast signal received for the first time.
可选地，距离阈值根据低轨卫星广播的波束方向和波束服务区域设置。Optionally, the distance threshold is set according to the beam direction and beam service area of the low-orbit satellite broadcast.
可选地，标识为帧或者超级帧的编号。Optionally, the identifier is the number of a frame or a superframe.
可选地，还包括：Optionally, also include:
第一预补偿模块，被配置为接收地面终端使用相应随机接入信道资源发送的信号，接收到信号后，先对至少两个随机接入信道使用对应的预补偿值进行预补偿，再进行随机接入导频检测；The first pre-compensation module is configured to receive signals sent by ground terminals using corresponding random access channel resources. After receiving the signals, first perform pre-compensation on at least two random access channels using corresponding pre-compensation values, and then perform random Access pilot detection;
第二预补偿模块，被配置为向覆盖区域内的地面终端发送不同的预补偿值，以使地面终端对使用不同随机接入信道资源发送的信号采用不同的预补偿值进行预补偿。The second precompensation module is configured to send different precompensation values to ground terminals in the coverage area, so that the ground terminals use different precompensation values to perform precompensation on signals sent using different random access channel resources.
可选地，预补偿值根据地面终端与低轨卫星的距离确定。Optionally, the pre-compensation value is determined according to the distance between the ground terminal and the low-orbit satellite.
第四方面，本公开实施例中提供了一种低轨卫星系统的信道资源分配装置，包括：In a fourth aspect, an embodiment of the present disclosure provides a channel resource allocation device for a low-orbit satellite system, including:
第一接收模块，被配置为接收覆盖当前区域的低轨卫星的配置信息，配置信息中包括至少两个随机信道接入资源信息；The first receiving module is configured to receive configuration information of low-orbit satellites covering the current area, and the configuration information includes at least two random channel access resource information;
选择模块，被配置为选择至少两个随机接入信道资源中的一个进行随机接入；其中，与使用同一随机接入信道资源的其他地面终端之间的信号，相比使用不同随机接入信道资源的地面终端之间的信号所遭受的多普勒频移差值更小。The selection module is configured to select one of at least two random access channel resources for random access; wherein, compared with signals between other ground terminals using the same random access channel resource, a different random access channel is used Signals between terrestrial terminals of the resource suffer less Doppler shift difference.
可选地，至少两个随机接入信道资源占用不同的时间和/或频率资源；或者，至少两个随机接入信道资源使用相同的时间和/或频率资源，且不同随机接入信道的随机接入导频使用不同的根序列。Optionally, at least two random access channel resources occupy different time and/or frequency resources; or, at least two random access channel resources use the same time and/or frequency resources, and the random access channel resources of different random access channels Access pilots use different root sequences.
可选地，选择模块包括：Optionally, select modules include:
第一获取单元，被配置为获取低轨卫星配置的距离阈值，The first obtaining unit is configured to obtain the distance threshold configured by the low-orbit satellite,
确定单元，被配置为确定与低轨卫星的相对距离，a determination unit configured to determine a relative distance to a low-orbit satellite,
第一选择单元，被配置为根据相对距离与距离阈值之间的大小关系选择使用至少两个随机接入信道资源中的一个；The first selection unit is configured to select and use one of at least two random access channel resources according to the size relationship between the relative distance and the distance threshold;
或者，包括：Alternatively, include:
第二获取单元，被配置为接收低轨卫星在不同时间发送的携带有不同标识的广播信号并获取其中配置的标识，The second acquisition unit is configured to receive broadcast signals with different identifiers sent by low-orbit satellites at different times and acquire the identifiers configured therein,
第二选择单元，被配置为根据首次接收到广播信号中的标识选择至少两个随机接入信道资源中一个。The second selection unit is configured to select one of the at least two random access channel resources according to the identifier in the broadcast signal received for the first time.
可选地，距离阈值根据低轨卫星广播的波束方向和波束服务区域设置。Optionally, the distance threshold is set according to the beam direction and beam service area of the low-orbit satellite broadcast.
可选地，确定单元包括：Optionally, the determination unit includes:
第一定位子单元，被配置为根据卫星定位系统确定自身位置；The first positioning subunit is configured to determine its own position according to a satellite positioning system;
第二定位子单元，被配置为通过星历数据确定低轨卫星的当前位置；The second positioning subunit is configured to determine the current position of the low-orbit satellite through ephemeris data;
距离确定子单元，被配置为根据自身位置和低轨卫星的当前位置，确定与低轨卫星的相对距离。The distance determination subunit is configured to determine the relative distance to the low-orbit satellite according to its own position and the current position of the low-orbit satellite.
可选地，还包括：Optionally, also include:
第二接收模块，被配置为从覆盖当前区域的低轨卫星接收预补偿值，至少两个随机接入信道资源对应的预补偿值不同；第五发送模块，被配置为使用预补偿值调整随机接入导频后发送。The second receiving module is configured to receive the precompensation value from the low-orbit satellite covering the current area, and the precompensation values corresponding to at least two random access channel resources are different; the fifth sending module is configured to use the precompensation value to adjust the random Sent after the access pilot.
第五方面，本公开实施例中提供了一种电子设备，包括存储器和处理器，其中，所述存储器用于存储一条或多条计算机指令，其中，所述一条或多条计算机指令被所述处理器执行以实现第一方面或第二方面所述的方法步骤。In a fifth aspect, an embodiment of the present disclosure provides an electronic device, including a memory and a processor, wherein the memory is used to store one or more computer instructions, wherein the one or more computer instructions are stored by the The processor executes to realize the method steps described in the first aspect or the second aspect.
第六方面，本公开实施例中提供了一种可读存储介质，其上存储有计算机指令，该计算机指令被处理器执行时实现如第一方面或第二方面所述的方法。In a sixth aspect, embodiments of the present disclosure provide a readable storage medium on which computer instructions are stored, and when the computer instructions are executed by a processor, the method as described in the first aspect or the second aspect is implemented.
本公开实施例提供的低轨卫星系统中的信道资源分配方法，为当前低轨卫星配置至少两个随机接入信道资源，然后向所述低轨卫星波束覆盖区域内的地面终端发送该至少两个随机接入信道资源的配置信息，以使所述地面终端选择使用其中一个随机接入信道资源，并且使用同一随机接入信道资源的不同地面终端之间的信号，相比使用不同随机接入信道资源的不同地面终端之间的信号所遭受的多普勒频移差值更小，避免了多普勒频移差较大的地面终端对低轨卫星检测导频序列的干扰，提高了检测准确性。The channel resource allocation method in the low-orbit satellite system provided by the embodiments of the present disclosure configures at least two random access channel resources for the current low-orbit satellite, and then sends the at least two random access channel resources to the ground terminal in the beam coverage area of the low-orbit satellite. Configuration information of two random access channel resources, so that the ground terminal chooses to use one of the random access channel resources, and the signals between different ground terminals using the same random access channel resource, compared with those using different random access channel resources The Doppler frequency shift difference suffered by signals between different ground terminals of channel resources is smaller, which avoids the interference of ground terminals with large Doppler frequency shift difference on the low-orbit satellite detection pilot sequence, and improves the detection efficiency. accuracy.
应当理解的是，以上的一般描述和后文的细节描述仅是示例性和解释性的，并不能限制本公开。It is to be understood that both the foregoing general description and the following detailed description are exemplary and explanatory only and are not restrictive of the present disclosure.
附图说明Description of drawings
结合附图，通过以下非限制性实施方式的详细描述，本公开的其它特征、目的和优点将变得更加明显。在附图中：Other features, objects and advantages of the present disclosure will become more apparent through the following detailed description of non-limiting embodiments in conjunction with the accompanying drawings. In the attached picture:
图1示出根据本公开的实施例的低轨卫星星座的示意图；FIG. 1 shows a schematic diagram of a low-orbit satellite constellation according to an embodiment of the present disclosure;
图2示出根据本公开的实施例的卫星系统架构示意图；FIG. 2 shows a schematic diagram of a satellite system architecture according to an embodiment of the present disclosure;
图3示出根据本公开的实施例的信道资源分配方法的一种示例性流程图；FIG. 3 shows an exemplary flowchart of a channel resource allocation method according to an embodiment of the present disclosure;
图4示出本公开实施例适用的一种示例性应用场景；FIG. 4 shows an exemplary application scenario to which embodiments of the present disclosure are applicable;
图5示出根据本公开的实施例的信道资源分配方法的另一种示例性流程图；FIG. 5 shows another exemplary flowchart of a channel resource allocation method according to an embodiment of the present disclosure;
图6示出本公开实施例适用的另一种示例性应用场景；FIG. 6 shows another exemplary application scenario to which the embodiments of the present disclosure are applicable;
图7示出本公开实施例适用的第三种示例性应用场景；FIG. 7 shows a third exemplary application scenario applicable to embodiments of the present disclosure;
图8示出根据本公开的实施例的信道资源分配方法的第三种示例性流程图；FIG. 8 shows a third exemplary flowchart of a channel resource allocation method according to an embodiment of the present disclosure;
图9示出根据本公开的实施例的信道资源分配装置的一种示例性结构框图；FIG. 9 shows an exemplary structural block diagram of a channel resource allocation device according to an embodiment of the present disclosure;
图10示出根据本公开的实施例的信道资源分配装置的另一种示例性结构框图；FIG. 10 shows another exemplary structural block diagram of a channel resource allocation device according to an embodiment of the present disclosure;
图11示出适于用来实现根据本公开实施例的信道资源分配方法的电子设备的结构示意图。Fig. 11 shows a schematic structural diagram of an electronic device suitable for implementing the channel resource allocation method according to an embodiment of the present disclosure.
具体实施方式Detailed ways
下文中，将参考附图详细描述本公开的示例性实施例，以使本领域技术人员可容易地实现它们。此外，为了清楚起见，在附图中省略了与描述示例性实施例无关的部分。Hereinafter, exemplary embodiments of the present disclosure will be described in detail with reference to the accompanying drawings so that those skilled in the art can easily realize them. Also, for clarity, parts not related to describing the exemplary embodiments are omitted in the drawings.
为了使读者方便理解本申请实施例，首先对本申请实施例中使用的部分术语进行解释说明，可以理解，以下术语用于帮助读者更好的理解本申请的应用场景及技术方案，使读者能够通过术语解释快速理解方案中的技术特征，术语解释并不会对技术特征构成绝对限定。In order to make it easier for readers to understand the embodiments of this application, some terms used in the embodiments of this application are first explained. It can be understood that the following terms are used to help readers better understand the application scenarios and technical solutions of this application, so that readers can pass Explanation of terms Quickly understand the technical features in the scheme, and the explanation of terms does not constitute an absolute limit to the technical features.
1）地面终端：也称终端、终端设备、用户设备（User Equipment，UE）、移动台、移动终端等，可以是手机、平板电脑、带无线收发功能的电脑、虚拟现实终端、增强现实终端等终端设备。1) Ground terminal: also known as terminal, terminal equipment, user equipment (User Equipment, UE), mobile station, mobile terminal, etc., which can be mobile phones, tablet computers, computers with wireless transceiver functions, virtual reality terminals, augmented reality terminals, etc. Terminal Equipment.
2）PRACH：Physical Random Access Channel，物理随机接入信道。用户通过PRACH信道发送随机接入前导码，开始尝试接入网络与网络建立信令连接。2) PRACH: Physical Random Access Channel, physical random access channel. The user sends a random access preamble through the PRACH channel, and starts trying to access the network to establish a signaling connection with the network.
3）随机接入前导码：也称随机接入前导、随机接入前导序列、随机接入导频、导频序列、前导码，本公开不做区分。前导码包括三部分：循环前缀CP、序列部分（Sequence）、保护间隔（Guard Time，GT）。需要注意的是，随机接入前导序列不应与上述提到的序列部分（Sequence）混淆。3) Random access preamble: also called random access preamble, random access preamble sequence, random access pilot, pilot sequence, and preamble, which are not distinguished in this disclosure. The preamble includes three parts: cyclic prefix CP, sequence part (Sequence), and guard interval (Guard Time, GT). It should be noted that the random access preamble should not be confused with the above-mentioned sequence part (Sequence).
4）波束：指由卫星天线发射出来的电磁波在地球表面上形成的形状，其形状由发射天线确定。一个卫星小区包含至少一个卫星波束，在某些情况下，一个卫星波束或者多个卫星波束的集合也可以认为是一个小区的概念。4) Beam: refers to the shape formed by the electromagnetic wave emitted by the satellite antenna on the surface of the earth, and its shape is determined by the transmitting antenna. A satellite cell includes at least one satellite beam. In some cases, a satellite beam or a collection of multiple satellite beams can also be considered as a concept of a cell.
5）星历：是指在GPS测量中，天体运行随时间而变的精确位置或轨迹表，它是时间的函数。卫星星历可以确定飞行体的时间、位置、速度等运行状态等。5) Ephemeris: It refers to the precise position or trajectory table of celestial bodies changing with time in GPS measurement, which is a function of time. Satellite ephemeris can determine the time, position, speed and other operating states of flying objects.
在本公开中，应理解，诸如“包括”或“具有”等的术语旨在指示本说明书中所公开的特征、数字、步骤、行为、部件、部分或其组合的存在，并且不欲排除一个或多个其他特征、数字、步骤、行为、部件、部分或其组合存在或被添加的可能性。In the present disclosure, it should be understood that terms such as "comprising" or "having" are intended to indicate the presence of features, numbers, steps, acts, components, parts or combinations thereof disclosed in the specification, and are not intended to exclude one or a plurality of other features, numbers, steps, acts, parts, parts or combinations thereof exist or are added.
另外还需要说明的是，在不冲突的情况下，本公开中的实施例及实施例中的特征可以相互组合。下面将参考附图并结合实施例来详细说明本公开。In addition, it should be noted that, in the case of no conflict, the embodiments in the present disclosure and the features in the embodiments can be combined with each other. The present disclosure will be described in detail below with reference to the accompanying drawings and embodiments.
为至少部分地解决发明人发现的现有技术中的问题而提出本公开。The present disclosure is proposed to at least partially solve problems in the prior art discovered by the inventors.
图1示出根据本公开的实施例的低轨卫星星座的示意图。如图1所示，低轨卫星星座以Walker Polar星座为例，该星座由多个轨道101-A组成，每个轨道上运行着多个低轨卫星101，轨道在北极点和南极点附近交汇。低轨卫星通过通信链路向地面一个区域内提供无线接入服务。其中单个卫星相对地面保持移动，因此其通信链路覆盖的区域随时间改变而改变。FIG. 1 shows a schematic diagram of a low-orbit satellite constellation according to an embodiment of the present disclosure. As shown in Figure 1, the low-orbit satellite constellation takes the Walker Polar constellation as an example. This constellation is composed of multiple orbits 101-A, and each orbit runs multiple low-
图2示出根据本公开的实施例的卫星系统架构示意图。如图2所示，卫星系统主要包括：低轨卫星10、11、地面终端20和地面信关站30。低轨卫星10可与地面终端20通过服务链路进行双向通信。低轨卫星10、11之间通过星间链路进行通信，其中单个低轨卫星相对地面保持移动，其通信链路覆盖的区域随时间改变而改变，因此，在一些时刻可由低轨卫星10为地面终端20提供无线接入服务，另一些时刻则由低轨卫星11来提供。地面信关站30可与低轨卫星10之间通过馈电链路进行双向通信。地面信关站30提供低轨卫星10、11的遥测控服务，对低轨卫星星载计算机进行通信和控制，实现温度管理、姿态调整、定位等低轨卫星运行的服务。地面信关站30还与地面网络连接，并能够与Internet、公共交换电话网络（Public Switched Telephone Network，PSTN）进行通讯。其中，低轨卫星10与地面终端20和地面信关站30的通信链路载频可以是KA、KU、V波段的无线信号，低轨卫星10通过相控阵天线阵列实现的波束成形向地面发送和接收无线信号。Fig. 2 shows a schematic diagram of a satellite system architecture according to an embodiment of the present disclosure. As shown in FIG. 2 , the satellite system mainly includes: low-
应该理解，图2中的低轨卫星、地面终端、地面信关站的数目仅仅是示意性的。根据需要，可以具有任意数目的低轨卫星、地面终端、地面信关站。It should be understood that the numbers of low-orbit satellites, ground terminals, and ground gateways in Fig. 2 are only illustrative. According to needs, there can be any number of low-orbit satellites, ground terminals, and ground gateway stations.
图3示出根据本公开的实施例的方法的流程图。如图3所示，所述信道资源分配应用于低轨卫星侧，包括步骤S301-S302。Fig. 3 shows a flowchart of a method according to an embodiment of the present disclosure. As shown in Fig. 3, the channel resource allocation is applied to the low-orbit satellite side, including steps S301-S302.
在步骤S301中，为当前低轨卫星配置至少两个随机接入信道资源。In step S301, at least two random access channel resources are configured for the current low-orbit satellite.
在步骤S302中，向所述低轨卫星波束覆盖区域内的地面终端发送所述至少两个随机接入信道资源的配置信息，以使所述地面终端选择使用其中一个随机接入信道资源，并且使用同一随机接入信道资源的不同地面终端之间的信号，相比使用不同随机接入信道资源的不同地面终端之间的信号所遭受的多普勒频移差值更小。In step S302, sending the configuration information of the at least two random access channel resources to the ground terminal within the beam coverage area of the low-orbit satellite, so that the ground terminal selects to use one of the random access channel resources, and The Doppler frequency shift difference suffered by signals between different ground terminals using the same random access channel resource is smaller than that of signals between different ground terminals using different random access channel resources.
在低轨卫星通信系统中，随机接入信道中的两个序列如果存在较大的多普勒频移差，将增加接收机序列搜索的难度。具体分析如下，尽管一个地面终端与低轨卫星之间的多普勒频移较大，但是低轨卫星接收机可以根据预设的速度推算一个多普勒频移的粗估计，接收机根据粗估计进行预补偿后再进行序列的搜索。然而，如果两个地面终端之间的多普勒频移差较大，则预补偿后两个序列中的至少一个仍然遭受较大的频移残差，这依然会导致序列检测的错误。In the low-orbit satellite communication system, if there is a large Doppler frequency shift difference between the two sequences in the random access channel, it will increase the difficulty of sequence search by the receiver. The specific analysis is as follows. Although the Doppler frequency shift between a ground terminal and the low-orbit satellite is relatively large, the receiver of the low-orbit satellite can calculate a rough estimate of the Doppler frequency shift according to the preset speed. It is estimated that the sequence search is performed after pre-compensation is performed. However, if the Doppler shift difference between two ground terminals is large, at least one of the two sequences after precompensation still suffers from a large frequency shift residual, which still leads to sequence detection errors.
考虑到低轨卫星与地面终端之间是具有直射径（Line Of Sight，LOS）的莱斯（Rician）信道，两个地面终端之间的距离越近则二者之间的多普勒频移差越小。如图4所示，其中，
在本公开方式中，所述使用同一所述随机接入信道资源的不同地面终端之间的距离小于预设阈值。通过设置距离阈值，距离小于预设阈值的不同地面终端可以使用同一随机接入信道发送随机接入导频，能够避免多普勒频移差较大的地面终端的干扰，从而提高检测准确性。具体地，距离阈值可以综合多普勒频移差、卫星波束覆盖区域内的地面终端数量等因素设置，本公开在此不予赘述。In the disclosed manner, the distance between different ground terminals using the same random access channel resource is smaller than a preset threshold. By setting the distance threshold, different ground terminals whose distance is smaller than the preset threshold can use the same random access channel to send random access pilots, which can avoid the interference of ground terminals with large Doppler shift differences, thereby improving detection accuracy. Specifically, the distance threshold may be set based on factors such as the Doppler frequency shift difference and the number of ground terminals within the coverage area of the satellite beam, which will not be described in detail herein.
下面实施例以两个随机接入信道资源为例进行示意性说明，可以理解，本公开的实施例也适用于多个随机接入信道资源的情况。The following embodiments are schematically described by taking two random access channel resources as an example. It can be understood that the embodiments of the present disclosure are also applicable to a situation of multiple random access channel resources.
请参照图4，为低轨卫星10配置PRACH资源1、PRACH资源2，地面终端21、地面终端22可以选择PRACH资源1发送随机接入导频进行随机接入，而地面终端23可以选择PRACH资源2进行随机接入。在本公开一种实施方式中，至少两个随机接入信道资源占用不同的时间和/或频率资源，这样利用PRACH资源1发送的两个随机接入导频到达低轨卫星10接收机，由于其多普勒频移差较小，导频序列之间的正交性保持较好，检测误差大大降低。而利用PRACH资源2发送的随机接入导频到达接收机后，由于其是在不同的时间和/或频率资源发送的，并不会对PRACH资源1发送的两个随机接入导频造成干扰，从而可以准确地检测出导频序列。可以理解，利用PRACH资源2的地面终端数量可以是多个，具体数量根据预设阈值确定，只要其不影响利用PRACH资源1发送的地面终端即可。Please refer to FIG. 4, PRACH resource 1 and PRACH resource 2 are configured for the low-
在本公开另一种实施方式中，至少两个随机接入信道资源使用相同的时间和/或频率资源，且不同随机接入信道发送的随机接入导频使用不同的根序列，例如地面终端21、地面终端22、地面终端23发送随机接入导频参见下表1，地面终端21利用PRACH资源1发送（RS1，CS0）的随机接入导频，地面终端22利用PRACH资源1发送（RS1，CS50）的随机接入导频，地面终端23利用PRACH资源2发送（RS2，CS50）的随机接入导频，即使在低轨卫星接收机处接收到相同时间、频率上重叠的三个序列，由于相同根序列、不同循环移位的导频序列多普勒频移差较小，低轨卫星在搜索到该频率偏移附近时，导频序列之间的正交性保持较好，检测误差低；而由于PRACH资源2发送的随机接入导频根序列不同，不会影响PRACH资源1发送的随机接入导频的正交性，而通过搜索根序列、循环移位即可确定该导频序列，也不会收到PRACH资源1发送的随机接入导频的影响，使得导频序列检测具有较高的准确性。In another embodiment of the present disclosure, at least two random access channel resources use the same time and/or frequency resource, and the random access pilots sent by different random access channels use different root sequences, for example, the
表1：Table 1:
根据本公开的实施例，步骤S302中向所述低轨卫星波束覆盖区域内的地面终端发送所述至少两个随机接入信道资源的配置信息，包括：According to an embodiment of the present disclosure, in step S302, the configuration information of the at least two random access channel resources is sent to the ground terminal within the beam coverage area of the low-orbit satellite, including:
通过广播信号向所述低轨卫星波束覆盖区域内的地面终端发送所述至少两个随机接入信道资源的配置信息。Sending configuration information of the at least two random access channel resources to ground terminals within the beam coverage area of the low-orbit satellite through a broadcast signal.
在本公开方式中，广播信号可以是主同步信号PSS、辅助同步信号SSS、物理广播信道PBCH信号、最小系统信息MIB、剩余最小系统信息SIB等。In the present disclosure, the broadcast signal may be a primary synchronization signal PSS, a secondary synchronization signal SSS, a physical broadcast channel PBCH signal, minimum system information MIB, remaining minimum system information SIB, and the like.
根据本公开的实施例，所述方法还包括：According to an embodiment of the present disclosure, the method further includes:
接收到多个地面终端在所述至少两个随机接入信道资源上发送的重叠的随机接入导频序列后，基于频率搜索的方式检测多个地面终端的随机接入导频。After receiving the overlapping random access pilot sequences sent by the multiple ground terminals on the at least two random access channel resources, the random access pilots of the multiple ground terminals are detected based on frequency search.
在本公开方式中，由于多普勒频移远远大于子载波间隔，因此在至少两个随机接入信道资源上发送的重叠的随机接入导频序列后，低轨卫星需要进行频率搜索的方式来检测多条导频序列的存在。In the present disclosure, since the Doppler frequency shift is much larger than the subcarrier spacing, the low-orbit satellite needs to perform frequency search after overlapping random access pilot sequences sent on at least two random access channel resources. way to detect the presence of multiple pilot sequences.
根据本公开的实施例，如图5所示，所述方法还包括步骤S303-S304。According to an embodiment of the present disclosure, as shown in FIG. 5 , the method further includes steps S303-S304.
在步骤S303中，向所述地面终端发送预先设置的距离阈值，以便所述地面终端根据与所述低轨卫星的相对距离与所述距离阈值之间的大小关系选择使用所述至少两个随机接入信道资源中的其中一个。In step S303, a preset distance threshold is sent to the ground terminal, so that the ground terminal selects to use the at least two random Access one of the channel resources.
在步骤S304中，在不同时间发送携带有不同标识的广播信号，以便所述地面终端根据首次接收到广播信号中的标识选择使用所述至少两个随机接入信道资源中的其中一个。In step S304, broadcast signals carrying different identifiers are sent at different times, so that the ground terminal selects to use one of the at least two random access channel resources according to the identifier in the broadcast signal received for the first time.
需要说明的是，上述步骤S303、S304的目的均是实现地面终端从至少两个随机接入信道资源中选择其中一个进行随机接入，因此，低轨卫星侧可以任选其中一个步骤执行；一些情况下，低轨卫星侧也可以同时执行上述两个步骤，而在地面终端侧根据距离阈值或者标识中的一种来选择随机接入信道资源进行随机接入，本公开对此不做限制。It should be noted that the purpose of the above steps S303 and S304 is to realize that the ground terminal selects one of at least two random access channel resources for random access, therefore, the low-orbit satellite side can choose one of the steps to perform; some In some cases, the low-orbit satellite side can also perform the above two steps at the same time, and the ground terminal side selects random access channel resources for random access according to one of the distance threshold or the identifier, which is not limited in the present disclosure.
根据本公开的实施例，低轨卫星可以设置一个距离阈值，当地面终端计算出与低轨卫星的相对距离小于距离阈值时，选择随机接入信道资源1；反之，地面终端选择随机接入信道资源2。According to an embodiment of the present disclosure, a low-orbit satellite can set a distance threshold. When the ground terminal calculates that the relative distance from the low-orbit satellite is less than the distance threshold, the random access channel resource 1 is selected; otherwise, the ground terminal selects the random access channel resource2.
其中，步骤S303中距离阈值根据低轨卫星广播的波束方向和波束服务区域设置。请参照图4，低轨卫星广播的波束方向和波束服务区域确定了波束覆盖区域，可以低轨卫星至波束覆盖区域的中心位置的距离作为距离阈值，进而地面终端21、地面终端22与低轨位置10之间的距离小于距离阈值，选择随机接入信道资源1，而地面终端23与低轨位置10之间的距离大于距离阈值，选择随机接入信道资源2。可以理解，随着低轨卫星10的移动，距离阈值在确定后并不是固定不变的，也可以进行调整，本公开对此不做限制。Wherein, the distance threshold in step S303 is set according to the beam direction and beam service area of the low-orbit satellite broadcast. Please refer to Fig. 4, the beam direction and the beam service area of the low-orbit satellite broadcast determine the beam coverage area, and the distance from the low-orbit satellite to the center of the beam coverage area can be used as the distance threshold, and then the
以上实施方式需要确定地面终端与当前低轨卫星的相对距离，进而与距离阈值进行比较来选择随机接入信道资源。下面提供另一种实施方式，该实施方式无需确定二者的相对距离，适用于低轨卫星移动的场景，以下具体说明在该场景下，地面终端如何从至少两个随机接入信道资源中选择一个随机接入信道资源。In the above embodiments, the relative distance between the ground terminal and the current low-orbit satellite needs to be determined, and then compared with the distance threshold to select random access channel resources. Another implementation is provided below. This implementation does not need to determine the relative distance between the two, and is applicable to the scenario of low-orbit satellite movement. The following specifically describes how the ground terminal selects from at least two random access channel resources in this scenario. A random access channel resource.
根据本公开的实施例，请参照图6，低轨卫星10在不同时刻发送不同标识的广播信号，由不同标识发送的时刻、结合相应的标识可以建立起地面终端与低轨卫星的相对距离的对应关系，进而可以依据不同时刻接收到的标识情况，来直接选择随机接入信道资源，而无需再确定地面终端与低轨卫星的相对距离。According to an embodiment of the present disclosure, please refer to FIG. 6 , the low-
具体地，在T1时刻，低轨卫星10的波束覆盖区域覆盖到地面终端21、地面终端22，此时低轨卫星10发送广播信号，并且广播信号中包含标识#1。在T2时刻，低轨卫星10发送的广播信号中标识更新为标识#2，此时地面终端21、地面终端22、地面终端23均能接收到包含标识#2的广播信号。由此可见，地面终端首次搜索到的广播信号的标识如果相同，则其地理位置就接近，因此其随机接入导频所遭受的多普勒频移差也就越小。因此，在T2时刻，如果地面终端21、地面终端22、地面终端23发送随机接入导频，地面终端21和地面终端22会根据首次（T1时刻）接收到的广播信号包含的标识#1选择随机接入信道资源1；地面终端2 3会根据首次（T2时刻）接收到的广播信号包含的标识#2选择随机接入信道资源2。Specifically, at time T1, the beam coverage area of the low-
以上是以两个随机接入信道资源为例进行说明，此时标识#1、标识#2可以交替发送。可以理解，当随机接入信道资源为多个时，标识的数量也会相应的增加，并与随机接入信道资源的数量适配，本公开对此不予赘述。The above is described by taking two random access channel resources as an example, and at this time, the identifier #1 and the identifier #2 can be sent alternately. It can be understood that when there are multiple random access channel resources, the number of identifiers will increase correspondingly and be adapted to the number of random access channel resources, which will not be described in detail in this disclosure.
根据本公开的实施例，步骤304中所述标识为帧或者超级帧的编号。According to an embodiment of the present disclosure, the identification in step 304 is the serial number of a frame or a super frame.
具体地，可以将连续的帧进行编号，并依据编号确定标识。例如，以1个10ms帧为例，将连续的20个帧编号为1-20，其中，编号1-10的帧发送标识#1，编号11-20的帧发送标识#2，也就是说，编号1-10对应标识#1，编号11-20对应标识#2。或者将多个帧组成一个超级帧，然后按照同样的方式发送对应的标识。Specifically, consecutive frames may be numbered, and the identifier may be determined according to the number. For example, taking one 10ms frame as an example,
根据本公开的实施例，所述方法还可以包括：在卫星侧 对随机接入信道的信号先进行预补偿，即在接收所述地面终端使用相应随机接入信道资源发送的信号，接收到信号后，先对至少两个随机接入信道的信号使用对应的预补偿值进行预补偿，再进行随机接入导频检测。According to an embodiment of the present disclosure, the method may further include: performing pre-compensation on the random access channel signal on the satellite side, that is, after receiving the signal sent by the ground terminal using the corresponding random access channel resource, the received signal Finally, precompensation is performed on signals of at least two random access channels using corresponding precompensation values, and then random access pilot detection is performed.
根据本公开的实施例，如图7所示，所述方法还包括：According to an embodiment of the present disclosure, as shown in FIG. 7, the method further includes:
向所述低轨卫星波束覆盖区域内的地面终端发送预补偿值，以使所述地面终端根据所述预补偿值调整所述随机接入导频后发送。Sending the pre-compensation value to the ground terminal within the beam coverage area of the low-orbit satellite, so that the ground terminal adjusts the random access pilot according to the pre-compensation value before sending.
例如，地面终端21、地面终端22预补偿前分别发送随机接入导频的频率为10hz，其中，多普勒频移
在本公开方式中，所述向所述低轨卫星波束覆盖区域内的地面终端发送预补偿值，包括：In the present disclosure, the sending the pre-compensation value to the ground terminal within the beam coverage area of the low-orbit satellite includes:
向所述低轨卫星波束覆盖区域内的地面终端发送不同的预补偿值，以使所述地面终端对使用不同的所述随机接入信道资源发送的随机接入导频进行预补偿。Sending different precompensation values to ground terminals within the beam coverage area of the low-orbit satellite, so that the ground terminals perform precompensation on random access pilots sent using different random access channel resources.
具体地，可以在波束覆盖区域的基础上确定多个预补偿区域，每个预补偿区域确定一个预补偿值，以消除多普勒频移的对低轨卫星侧频率搜索范围的影响。例如选择PRACH资源1的地面终端21、地面终端21利用预补偿区域1中确定的第一预补偿值调整随机接入导频后发送，而选择PRACH资源2的地面终端23利用预补偿区域2中确定的第二预补偿值调整随机接入导频后发送。Specifically, multiple pre-compensation areas may be determined on the basis of the beam coverage area, and a pre-compensation value is determined for each pre-compensation area, so as to eliminate the influence of the Doppler frequency shift on the frequency search range of the low-orbit satellite side. For example, the
在本公开方式中，所述预补偿值根据所述地面终端与低轨卫星的距离确定。具体可以参照上述根据低轨卫星广播的波束方向和波束服务区域设置距离阈值的方式，本公开在此不予赘述。In the disclosed manner, the pre-compensation value is determined according to the distance between the ground terminal and the low-orbit satellite. Specifically, reference may be made to the foregoing method of setting the distance threshold according to the beam direction of the low-orbit satellite broadcast and the beam service area, which will not be described in detail herein.
本公开实施例的信道资源分配方法，为当前低轨卫星配置至少两个随机接入信道资源，然后向所述低轨卫星波束覆盖区域内的地面终端发送所述随机接入信道资源的配置信息，以使所述地面终端选择使用其中一个所述随机接入信道资源，并且使用同一所述随机接入信道资源的不同地面终端之间的信号，相比使用不同随机接入信道资源的不同地面终端之间的信号所遭受的多普勒频移差值更小，避免了多普勒频移差较大的地面终端对低轨卫星检测导频序列的干扰，提高了检测准确性。The channel resource allocation method of the embodiment of the present disclosure configures at least two random access channel resources for the current low-orbit satellite, and then sends the configuration information of the random access channel resources to the ground terminal within the beam coverage area of the low-orbit satellite , so that the ground terminal chooses to use one of the random access channel resources, and the signals between different ground terminals using the same random access channel resource, compared with different ground terminals using different random access channel resources The Doppler frequency shift difference suffered by the signals between the terminals is smaller, which avoids the interference of the ground terminal with a large Doppler frequency shift difference to the low-orbit satellite detection pilot sequence, and improves the detection accuracy.
图8示出根据本公开的实施例的信道资源分配方法的流程图。如图8所示，所述方法应用于地面终端侧，包括步骤S801-S802。Fig. 8 shows a flowchart of a channel resource allocation method according to an embodiment of the present disclosure. As shown in Fig. 8, the method is applied to the ground terminal side, including steps S801-S802.
在步骤S801中，从覆盖当前地面终端中的低轨卫星接收配置信息；所述配置信息中包括所述低轨卫星配置的至少两个随机接入信道资源；In step S801, configuration information is received from the low-orbit satellite covering the current ground terminal; the configuration information includes at least two random access channel resources configured by the low-orbit satellite;
在步骤S802中，从所述至少两个随机接入信道资源选择使用其中一个进行随机接入；其中，所述当前地面终端和选择同一所述随机接入信道资源的其他地面终端之间的信号，相比使用不同随机接入信道资源的不同地面终端之间的信号所遭受的多普勒频移差值更小。In step S802, select and use one of the at least two random access channel resources for random access; wherein, the signal between the current ground terminal and other ground terminals that select the same random access channel resource , which is smaller than the difference in Doppler frequency shift suffered by signals between different ground terminals using different random access channel resources.
本公开实施例的一些技术细节可以参见图2-图7示出的实施例部分，在此不予赘述。For some technical details of the embodiments of the present disclosure, reference may be made to the embodiments shown in FIG. 2 to FIG. 7 , and details are not repeated here.
根据本公开的实施例，所述当前地面终端与选择同一所述随机接入信道资源的所述其他地面终端之间的距离小于预设阈值。According to an embodiment of the present disclosure, the distance between the current ground terminal and the other ground terminals that select the same random access channel resource is smaller than a preset threshold.
根据本公开的实施例，步骤S802中从所述至少两个随机接入信道资源选择使用其中一个，包括：According to an embodiment of the present disclosure, selecting and using one of the at least two random access channel resources in step S802 includes:
从所述低轨卫星接收广播信号，并从中获取所述低轨卫星配置的距离阈值；receiving a broadcast signal from the low-orbit satellite, and obtaining therefrom a distance threshold configured by the low-orbit satellite;
确定当前地面终端与所述低轨卫星的相对位置；determining the relative position of the current ground terminal to the low-orbit satellite;
根据所述相对位置与所述距离阈值之间的大小关系选择使用所述至少两个随机接入信道资源中的其中一个。Selecting and using one of the at least two random access channel resources according to the magnitude relationship between the relative position and the distance threshold.
根据本公开的实施例，所述距离阈值根据低轨卫星广播的波束方向和波束服务区域设置。According to an embodiment of the present disclosure, the distance threshold is set according to the beam direction and beam service area of the low-orbit satellite broadcast.
根据本公开的实施例，所述确定当前地面终端与所述低轨卫星的相对位置，包括：According to an embodiment of the present disclosure, the determining the relative position of the current ground terminal and the low-orbit satellite includes:
根据卫星定位系统定位所述当前地面终端的当前位置；locating the current location of the current ground terminal according to a satellite positioning system;
通过星历数据确定所述低轨卫星的当前位置；determining the current position of the low-orbit satellite through ephemeris data;
根据所述当前地面终端的当前位置、所述低轨卫星的当前位置，确定所述当前地面终端与所述低轨卫星的相对位置。According to the current position of the current ground terminal and the current position of the low-orbit satellite, determine the relative position of the current ground terminal and the low-orbit satellite.
根据本公开的实施例，步骤S802中从所述至少两个随机接入信道资源选择使用其中一个，包括：According to an embodiment of the present disclosure, selecting and using one of the at least two random access channel resources in step S802 includes:
从所述低轨卫星接收所述低轨卫星在不同时间发送的携带有不同标识的广播信号，并从中获取所述低轨卫星配置的标识；根据首次接收到的广播信号的标识选择所述至少两个随机接入信道资源中的其中一个。Receive from the low-orbit satellite broadcast signals with different identifiers sent by the low-orbit satellite at different times, and obtain the identifier of the configuration of the low-orbit satellite; select the at least one according to the identifier of the broadcast signal received for the first time One of the two random access channel resources.
根据本公开的实施例，所述标识为帧或者超级帧的编号。According to an embodiment of the present disclosure, the identifier is a number of a frame or a super frame.
根据本公开的实施例，所述至少两个随机接入信道资源占用不同的时间和/或频率资源；或者，所述至少两个随机接入信道资源使用相同的时间和/或频率资源，且不同随机接入信道发送的随机接入导频使用不同的根序列。According to an embodiment of the present disclosure, the at least two random access channel resources occupy different time and/or frequency resources; or, the at least two random access channel resources use the same time and/or frequency resources, and Random access pilots sent on different random access channels use different root sequences.
根据本公开的实施例，步骤S802中从所述至少两个随机接入信道资源选择使用其中一个进行随机接入之前，还包括：According to an embodiment of the present disclosure, before selecting and using one of the at least two random access channel resources for random access in step S802, the method further includes:
从覆盖当前地面终端中的低轨卫星接收预补偿值；receiving precompensation values from low-orbit satellites covering the current ground terminal;
使用所述预补偿值调整所述随机接入导频后发送。The random access pilot is adjusted by using the precompensation value and then sent.
根据本公开的实施例，所述预补偿值根据所述地面终端使用的所述随机接入信道资源区分设置。According to an embodiment of the present disclosure, the pre-compensation value is set differently according to the random access channel resource used by the ground terminal.
本公开实施例的信道资源分配方法，从覆盖当前地面终端中的低轨卫星接收配置信息，所述配置信息中包括所述低轨卫星配置的至少两个随机接入信道资源，然后从所述至少两个随机接入信道资源选择使用其中一个进行随机接入，其中，所述当前地面终端与选择同一所述随机接入信道资源的其他地面终端之间的信号，相比使用不同随机接入信道资源的不同地面终端之间的信号所遭受的多普勒频移差值更小，避免了多普勒频移差较大的地面终端对低轨卫星检测导频序列的干扰，提高了检测准确性。The channel resource allocation method of the embodiment of the present disclosure receives configuration information from the low-orbit satellite covering the current ground terminal, the configuration information includes at least two random access channel resources configured by the low-orbit satellite, and then from the At least two random access channel resources are selected to use one of them for random access, wherein, compared with signals between the current ground terminal and other ground terminals that select the same random access channel resource, different random access channels are used. The Doppler frequency shift difference suffered by signals between different ground terminals of channel resources is smaller, which avoids the interference of ground terminals with large Doppler frequency shift difference on the low-orbit satellite detection pilot sequence, and improves the detection efficiency. accuracy.
图9示出根据本公开的实施例的信道资源分配装置的结构框图。其中，该装置可以通过软件、硬件或者两者的结合实现成为电子设备的部分或者全部。如图9所示，所述信道资源分配装置900包括配置模块901和第一发送模块902。Fig. 9 shows a structural block diagram of a channel resource allocation device according to an embodiment of the present disclosure. Wherein, the device can be implemented as part or all of the electronic equipment through software, hardware or a combination of the two. As shown in FIG. 9 , the channel
配置模块901，被配置为为当前低轨卫星配置至少两个随机接入信道资源；The
第一发送模块902，被配置为向所述低轨卫星波束覆盖区域内的地面终端发送所述至少两个随机接入信道资源的配置信息，以使所述地面终端选择使用其中一个随机接入信道资源，并且使用同一所述随机接入信道资源的不同地面终端之间的信号，相比使用不同随机接入信道资源的不同地面终端之间的信号所遭受的多普勒频移差值更小。The
根据本公开的实施例，所述第一发送模块902中向所述低轨卫星波束覆盖区域内的地面终端发送所述至少两个随机接入信道资源的配置信息的部分被配置为：According to an embodiment of the present disclosure, the part of the
通过广播信号向所述低轨卫星波束覆盖区域内的地面终端发送所述随机接入信道资源的配置信息。Sending the configuration information of the random access channel resources to the ground terminals within the beam coverage area of the low-orbit satellite through a broadcast signal.
根据本公开的实施例，所述至少两个随机接入信道资源占用不同的时间和/或频率资源；或者，According to an embodiment of the present disclosure, the at least two random access channel resources occupy different time and/or frequency resources; or,
所述至少两个随机接入信道资源使用相同的时间和/或频率资源，且不同随机接入信道发送的随机接入导频使用不同的根序列。The at least two random access channel resources use the same time and/or frequency resource, and random access pilots sent by different random access channels use different root sequences.
根据本公开的实施例，所述使用同一所述随机接入信道资源的不同地面终端之间的距离小于预设阈值。According to an embodiment of the present disclosure, the distance between different ground terminals using the same random access channel resource is smaller than a preset threshold.
根据本公开的实施例，所述装置还包括：According to an embodiment of the present disclosure, the device further includes:
搜索模块，被配置为接收到多个所述地面终端在所述至少两个随机接入信道资源上发送的重叠的随机接入导频序列后，基于频率搜索的方式检测多个所述地面终端的随机接入导频。The search module is configured to detect multiple ground terminals based on frequency search after receiving overlapping random access pilot sequences sent by multiple ground terminals on the at least two random access channel resources random access pilot.
根据本公开的实施例，所述装置还包括：According to an embodiment of the present disclosure, the device further includes:
第二发送模块，被配置为向所述地面终端发送预先设置的距离阈值，以便所述地面终端根据与所述低轨卫星的相对距离与所述距离阈值之间的大小关系选择使用所述至少两个随机接入信道资源中的其中一个；或者The second sending module is configured to send a preset distance threshold to the ground terminal, so that the ground terminal selects to use the at least one of the two random access channel resources; or
第三发送模块，被配置为在不同时间发送携带有不同标识的广播信号，以便所述地面终端根据首次接收到广播信号中的标识选择使用所述至少两个随机接入信道资源中的其中一个。The third sending module is configured to send broadcast signals carrying different identifiers at different times, so that the ground terminal selects to use one of the at least two random access channel resources according to the identifier in the broadcast signal received for the first time .
根据本公开的实施例，所述距离阈值根据低轨卫星广播的波束方向和波束服务区域设置。According to an embodiment of the present disclosure, the distance threshold is set according to the beam direction and beam service area of the low-orbit satellite broadcast.
根据本公开的实施例，所述标识为帧或者超级帧的编号。According to an embodiment of the present disclosure, the identifier is a number of a frame or a super frame.
根据本公开的实施例，所述装置还包括：According to an embodiment of the present disclosure, the device further includes:
第四发送模块，被配置为向所述低轨卫星波束覆盖区域内的地面终端发送预补偿值，以使所述地面终端根据所述预补偿值调整所述随机接入导频后发送。The fourth sending module is configured to send a pre-compensation value to a ground terminal within the beam coverage area of the low-orbit satellite, so that the ground terminal adjusts the random access pilot according to the pre-compensation value before sending.
根据本公开的实施例，所述第四发送模块中向所述低轨卫星波束覆盖区域内的地面终端发送预补偿值的部分被配置为：According to an embodiment of the present disclosure, the part of the fourth sending module that sends the pre-compensation value to the ground terminal within the beam coverage area of the low-orbit satellite is configured as:
向所述低轨卫星波束覆盖区域内的地面终端发送不同的预补偿值，以使所述地面终端对使用不同的所述随机接入信道资源发送的随机接入导频进行预补偿。Sending different precompensation values to ground terminals within the beam coverage area of the low-orbit satellite, so that the ground terminals perform precompensation on random access pilots sent using different random access channel resources.
根据本公开的实施例，所述预补偿值根据所述地面终端与低轨卫星的距离确定。According to an embodiment of the present disclosure, the pre-compensation value is determined according to the distance between the ground terminal and the low-orbit satellite.
图10示出根据本公开的实施例的信道资源分配装置的结构框图。其中，该装置可以通过软件、硬件或者两者的结合实现成为电子设备的部分或者全部。如图10所示，所述信道资源分配装置1000包括：第一接收模块1001和选择模块1002：Fig. 10 shows a structural block diagram of a channel resource allocation device according to an embodiment of the present disclosure. Wherein, the device can be implemented as part or all of the electronic equipment through software, hardware or a combination of the two. As shown in Figure 10, the channel
第一接收模块1001，被配置为从覆盖当前地面终端中的低轨卫星接收配置信息；所述配置信息中包括所述低轨卫星配置的至少两个随机接入信道资源；The
选择模块1002，被配置为从所述至少两个随机接入信道资源选择使用其中一个进行随机接入；其中，所述当前地面终端和选择同一随机接入信道资源的其他地面终端之间的信号，相比使用不同随机接入信道资源的不同地面终端之间的信号所遭受的多普勒频移差值更小。The
根据本公开的实施例，所述当前地面终端与选择同一随机接入信道资源的所述其他地面终端之间的距离小于预设阈值。According to an embodiment of the present disclosure, the distance between the current ground terminal and the other ground terminals that select the same random access channel resource is smaller than a preset threshold.
根据本公开的实施例，所述选择模块1002包括：According to an embodiment of the present disclosure, the
第一获取单元，被配置为从所述低轨卫星接收广播信号，并从中获取所述低轨卫星配置的距离阈值；A first obtaining unit configured to receive a broadcast signal from the low-orbit satellite, and obtain a distance threshold configured by the low-orbit satellite;
确定单元，被配置为确定当前地面终端与所述低轨卫星的相对位置；a determining unit configured to determine the relative position of the current ground terminal and the low-orbit satellite;
第一选择单元，被配置为根据所述相对位置与所述距离阈值之间的大小关系选择使用所述至少两个随机接入信道资源中的其中一个。The first selection unit is configured to select and use one of the at least two random access channel resources according to the magnitude relationship between the relative position and the distance threshold.
根据本公开的实施例，所述距离阈值根据低轨卫星广播的波束方向和波束服务区域设置。According to an embodiment of the present disclosure, the distance threshold is set according to the beam direction and beam service area of the low-orbit satellite broadcast.
根据本公开的实施例，所述确定单元包括：According to an embodiment of the present disclosure, the determining unit includes:
第一定位子单元，被配置为根据卫星定位系统定位所述当前地面终端的当前位置；The first positioning subunit is configured to locate the current position of the current ground terminal according to a satellite positioning system;
第二定位子单元，被配置为通过星历数据确定所述低轨卫星的当前位置；The second positioning subunit is configured to determine the current position of the low-orbit satellite through ephemeris data;
距离确定子单元，被配置为根据所述当前地面终端的当前位置、所述低轨卫星的当前位置，确定所述当前地面终端与所述低轨卫星的相对位置。The distance determination subunit is configured to determine a relative position between the current ground terminal and the low-orbit satellite according to the current position of the current ground terminal and the current position of the low-orbit satellite.
根据本公开的实施例，所述选择模块1002包括：According to an embodiment of the present disclosure, the
第二获取单元，被配置为从所述低轨卫星接收所述低轨卫星在不同时间发送的携带有不同标识的广播信号，并从中获取所述低轨卫星配置的标识；The second obtaining unit is configured to receive broadcast signals with different identifications sent by the low-orbit satellites at different times from the low-orbit satellites, and obtain the configuration identification of the low-orbit satellites therefrom;
第二选择单元，被配置为根据首次接收到的广播信号的标识选择所述至少两个随机接入信道资源中的其中一个。The second selection unit is configured to select one of the at least two random access channel resources according to the identifier of the broadcast signal received for the first time.
根据本公开的实施例，所述标识为帧或者超级帧的编号。According to an embodiment of the present disclosure, the identifier is a number of a frame or a super frame.
根据本公开的实施例，所述至少两个随机接入信道资源占用不同的时间和/或频率资源；或者，所述至少两个随机接入信道资源使用相同的时间和/或频率资源，且不同随机接入信道发送的随机接入导频使用不同的根序列。According to an embodiment of the present disclosure, the at least two random access channel resources occupy different time and/or frequency resources; or, the at least two random access channel resources use the same time and/or frequency resources, and Random access pilots sent on different random access channels use different root sequences.
根据本公开的实施例，所述装置还包括：According to an embodiment of the present disclosure, the device further includes:
第二接收模块，被配置为从覆盖当前地面终端中的低轨卫星接收预补偿值；The second receiving module is configured to receive the pre-compensation value from the low-orbit satellite covering the current ground terminal;
第五发送模块，被配置为使用所述预补偿值调整所述随机接入导频后发送。The fifth sending module is configured to use the pre-compensation value to adjust the random access pilot and then send it.
根据本公开的实施例，所述预补偿值根据所述地面终端使用的所述随机接入信道资源区分设置。According to an embodiment of the present disclosure, the pre-compensation value is set differently according to the random access channel resource used by the ground terminal.
图11示出适于用来实现根据本公开实施例的信道资源分配的电子设备的结构示意图。Fig. 11 shows a schematic structural diagram of an electronic device suitable for implementing channel resource allocation according to an embodiment of the present disclosure.
如图11所示，电子设备1100包括处理单元（CPU）1101，其可以根据存储在只读存储器（ROM）1102中的程序或者从存储部分1108加载到随机访问存储器（RAM）1103中的程序而执行上述实施例中的各种处理。在RAM1103中，电子设备1100操作所需的各种程序和数据。CPU1101、ROM1102以及RAM1103通过总线1104彼此相连。输入/输出（I/O）接口1105也连接至总线1104。As shown in FIG. 11 , an
以下部件连接至I/O接口1105：包括键盘、鼠标等的输入部分1106；包括诸如阴极射线管（CRT）、液晶显示器（LCD）等以及扬声器等的输出部分1107；包括硬盘等的存储部分1108；以及包括诸如LAN卡、调制解调器等的网络接口卡的通信部分1109。通信部分1109经由诸如因特网的网络执行通信处理。驱动器1110也根据需要连接至I/O接口1105。可拆卸介质1111，诸如磁盘、光盘、磁光盘、半导体存储器等等，根据需要安装在驱动器1110上，以便于从其上读出的计算机程序根据需要被安装入存储部分1108。其中，所述处理单元1101可实现为CPU、GPU、TPU、FPGA、NPU等处理单元。The following components are connected to the I/O interface 1105: an
特别地，根据本公开的实施例，上文描述的方法可以被实现为计算机软件程序。例如，本公开的实施例包括一种计算机程序产品，其包括有形地包含在机器可读介质上的计算机程序，所述计算机程序包含用于执行上述方法的程序代码。在这样的实施例中，该计算机程序可以通过通信部分1109从网络上被下载和安装，和/或从可拆卸介质1111被安装。In particular, according to an embodiment of the present disclosure, the methods described above can be implemented as a computer software program. For example, embodiments of the present disclosure include a computer program product comprising a computer program tangibly embodied on a machine-readable medium, the computer program comprising program code for performing the method described above. In such an embodiment, the computer program may be downloaded and installed from a network via
附图中的流程图和框图，图示了按照本公开各种实施例的系统、方法和计算机程序产品的可能实现的体系架构、功能和操作。在这点上，流程图或框图中的每个方框可以代表一个模块、程序段或代码的一部分，所述模块、程序段或代码的一部分包含一个或多个用于实现规定的逻辑功能的可执行指令。也应当注意，在有些作为替换的实现中，方框中所标注的功能也可以以不同于附图中所标注的顺序发生。例如，两个接连地表示的方框实际上可以基本并行地执行，它们有时也可以按相反的顺序执行，这依所涉及的功能而定。也要注意的是，框图和/或流程图中的每个方框、以及框图和/或流程图中的方框的组合，可以用执行规定的功能或操作的专用的基于硬件的系统来实现，或者可以用专用硬件与计算机指令的组合来实现。The flowchart and block diagrams in the Figures illustrate the architecture, functionality, and operation of possible implementations of systems, methods and computer program products according to various embodiments of the present disclosure. In this regard, each block in a flowchart or block diagram may represent a module, program segment, or part of code that includes one or more Executable instructions. It should also be noted that, in some alternative implementations, the functions noted in the block may occur out of the order noted in the figures. For example, two blocks shown in succession may, in fact, be executed substantially concurrently, or they may sometimes be executed in the reverse order, depending upon the functionality involved. It should also be noted that each block of the block diagrams and/or flowchart illustrations, and combinations of blocks in the block diagrams and/or flowchart illustrations, can be implemented by a dedicated hardware-based system that performs the specified functions or operations , or may be implemented by a combination of dedicated hardware and computer instructions.
描述于本公开实施例中所涉及到的单元或模块可以通过软件的方式实现，也可以通过可编程硬件的方式来实现。所描述的单元或模块也可以设置在处理器中，这些单元或模块的名称在某种情况下并不构成对该单元或模块本身的限定。The units or modules involved in the embodiments described in the present disclosure may be implemented by means of software, or may be implemented by means of programmable hardware. The described units or modules may also be set in the processor, and the names of these units or modules do not constitute limitations on the units or modules themselves in some cases.
作为另一方面，本公开还提供了一种计算机可读存储介质，该计算机可读存储介质可以是上述实施例中电子设备或计算机系统中所包含的计算机可读存储介质；也可以是单独存在，未装配入设备中的计算机可读存储介质。计算机可读存储介质存储有一个或者一个以上程序，所述程序被一个或者一个以上的处理器用来执行描述于本公开的方法。As another aspect, the present disclosure also provides a computer-readable storage medium. The computer-readable storage medium may be the computer-readable storage medium contained in the electronic device or the computer system in the above-mentioned embodiments; it may also be a separate , a computer-readable storage medium not incorporated into a device. The computer-readable storage medium stores one or more programs, and the programs are used by one or more processors to execute the methods described in the present disclosure.
以上描述仅为本公开的较佳实施例以及对所运用技术原理的说明。本领域技术人员应当理解，本公开中所涉及的发明范围，并不限于上述技术特征的特定组合而成的技术方案，同时也应涵盖在不脱离所述发明构思的情况下，由上述技术特征或其等同特征进行任意组合而形成的其它技术方案。例如上述特征与本公开中公开的（但不限于）具有类似功能的技术特征进行互相替换而形成的技术方案。The above description is only a preferred embodiment of the present disclosure and an illustration of the applied technical principle. It should be understood by those skilled in the art that the scope of the invention involved in this disclosure is not limited to the technical solution formed by the specific combination of the above technical features, but also covers the technical solutions made by the above technical features without departing from the inventive concept. Other technical solutions formed by any combination of or equivalent features thereof. For example, a technical solution formed by replacing the above-mentioned features with technical features with similar functions disclosed in (but not limited to) this disclosure.
Claims (18)
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202210829897.3ACN115002919B (en) | 2022-07-15 | 2022-07-15 | Channel resource allocation method and device in low-orbit satellite system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202210829897.3ACN115002919B (en) | 2022-07-15 | 2022-07-15 | Channel resource allocation method and device in low-orbit satellite system |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN115002919A CN115002919A (en) | 2022-09-02 |
| CN115002919Btrue CN115002919B (en) | 2022-11-08 |
Family
ID=83022572
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202210829897.3AActiveCN115002919B (en) | 2022-07-15 | 2022-07-15 | Channel resource allocation method and device in low-orbit satellite system |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN115002919B (en) |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN115580343B (en)* | 2022-11-24 | 2023-04-18 | 北京九天微星科技发展有限公司 | Low-orbit satellite autonomous orbit control method, device and system |
Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107241134A (en)* | 2017-06-28 | 2017-10-10 | 东北大学 | A kind of method for channel allocation of LEO satellite communication systems |
Family Cites Families (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20040147257A1 (en)* | 1998-05-20 | 2004-07-29 | Phillips Kevin Paul | Satellite communication method and apparatus |
| US6463279B1 (en)* | 1999-11-17 | 2002-10-08 | Globalstar L.P. | Channel frequency allocation for multiple-satellite communication network |
| WO2005122616A1 (en)* | 2004-06-10 | 2005-12-22 | Matsushita Electric Industrial Co., Ltd. | Communication terminal device, base station device, and radio communication system |
| JP2020036106A (en)* | 2018-08-27 | 2020-03-05 | 株式会社Ｎｔｔドコモ | User terminal and radio base station |
| WO2022140996A1 (en)* | 2020-12-28 | 2022-07-07 | 华为技术有限公司 | Channel access method and communication device |
| CN113992260B (en)* | 2021-11-19 | 2023-06-23 | 东方红卫星移动通信有限公司 | Low-orbit satellite wide-narrow-band wave beam cooperative control method |
- 2022
- 2022-07-15CNCN202210829897.3Apatent/CN115002919B/enactiveActive
Patent Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107241134A (en)* | 2017-06-28 | 2017-10-10 | 东北大学 | A kind of method for channel allocation of LEO satellite communication systems |
Also Published As
| Publication number | Publication date |
|---|---|
| CN115002919A (en) | 2022-09-02 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| US11844040B2 (en) | Method and apparatus for performing communication based on non terrestrial network related parameter in wireless communication system | |
| US20220046566A1 (en) | Uplink timing and frequency synchronization | |
| US12213093B2 (en) | System and method for using a time gap | |
| CN113169794B (en) | Global navigation satellite system assisted aircraft wireless communication | |
| WO2017072745A1 (en) | Mobile satellite communication system | |
| US11683089B2 (en) | Radio communication system, radio communication method, and base station device | |
| WO2022113013A1 (en) | Apparatus and method of wireless communication | |
| US20230262632A1 (en) | Method and apparatus for determining timing advance value | |
| US20230140371A1 (en) | System and method for transmission indications | |
| EP4213411A1 (en) | Method and apparatus for performing random access procedure in wireless communication system | |
| EP4213410A1 (en) | Method and apparatus for performing random access procedure in wireless communication system | |
| US20250184952A1 (en) | Method and device for updating reference location in wireless communication system | |
| CN115002919B (en) | Channel resource allocation method and device in low-orbit satellite system | |
| EP4496417A1 (en) | Method and apparatus for performing uplink transmission and reception in wireless communication system | |
| WO2021026838A1 (en) | Accessing approach in integrated network | |
| WO2022207675A1 (en) | Methods, communications device and non-terrestrial network infrastructure equipment | |
| WO2025040519A1 (en) | Mechanism for transition to another cell without handover in a non-terrestrial network | |
| CN115665883A (en) | Random access method, device and equipment for low earth orbit satellite and readable storage medium | |
| CN116472684A (en) | Apparatus and method for wireless communication | |
| WO2022112840A2 (en) | Apparatus and method of wireless communication | |
| WO2025030537A1 (en) | Devices and methods for communication | |
| WO2025030543A1 (en) | Devices and methods for communication | |
| US20250056353A1 (en) | Method and apparatus for satellite switching in wireless communication system | |
| WO2025171594A1 (en) | Ntn timing tracking enhancement without valid gnss at ue | |
| EP4518459A1 (en) | Method and device for uplink transmission and reception in wireless communication system |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| GR01 | Patent grant | ||
| GR01 | Patent grant | ||
| PP01 | Preservation of patent right | Effective date of registration:20250922 Granted publication date:20221108 |