CN114257287B - Resource allocation method and equipment for satellite communication system - Google Patents
Resource allocation method and equipment for satellite communication system Download PDFInfo
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- CN114257287B CN114257287B CN202011014558.7A CN202011014558A CN114257287B CN 114257287 B CN114257287 B CN 114257287B CN 202011014558 A CN202011014558 A CN 202011014558A CN 114257287 B CN114257287 B CN 114257287B
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04B—TRANSMISSION
- H04B7/00—Radio transmission systems, i.e. using radiation field
- H04B7/14—Relay systems
- H04B7/15—Active relay systems
- H04B7/185—Space-based or airborne stations; Stations for satellite systems
- H04B7/1851—Systems using a satellite or space-based relay
- H04B7/18519—Operations control, administration or maintenance
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W28/00—Network traffic management; Network resource management
- H04W28/16—Central resource management; Negotiation of resources or communication parameters, e.g. negotiating bandwidth or QoS [Quality of Service]
- H04W28/26—Resource reservation
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W36/00—Hand-off or reselection arrangements
- H04W36/0005—Control or signalling for completing the hand-off
- H04W36/0011—Control or signalling for completing the hand-off for data sessions of end-to-end connection
- H04W36/0016—Hand-off preparation specially adapted for end-to-end data sessions
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W36/00—Hand-off or reselection arrangements
- H04W36/08—Reselecting an access point
Abstract
The invention discloses a resource allocation method and equipment of a satellite communication system, which can allocate the same cell resource to terminals of different cells in the same cell cluster under the condition that the total cell resource of the same cell cluster is limited, thereby improving the utilization rate of the cell resource and supporting the quick switching of a larger number of terminals. The resource allocation method of the satellite communication system comprises the following steps: the network side equipment determines at least one target cell to which at least two User Equipment (UE) need to be jointly switched according to the running direction of the satellite, and the at least two UE are located in the same cell cluster; if the network side equipment determines that the at least two UEs are located in different cells in the cell cluster, pre-allocating part of cell resources of each target cell in the at least one target cell to the at least two UEs, so that the at least two UEs share the same cell resource of the same target cell when switching to the same target cell.
Description
Technical Field
The present invention relates to the field of satellite communications technologies, and in particular, to a resource allocation method and device for a satellite communications system.
Background
A cell cluster is the smallest set of cells that can use all available frequencies, i.e. cells within the set use different frequencies, while cells outside the set (i.e. the cells are located in another cell cluster) can use the corresponding same frequencies. The number of cells in a cell cluster is called the frequency reuse factor.
In the satellite communication system, the satellite is in a high-speed moving state, which causes frequent switching of User Equipment (UE) to ensure communication quality. For example, in a scenario where the frequency reuse factor is greater than 1, multiple satellite beams correspond to the same cell cluster, and the UE may switch between the multiple satellite beams corresponding to the same cell cluster. In the prior art, in order to enable the UE to switch between different satellite beams quickly, multiple sets of cell resources may be configured for the UE in advance, and in order to avoid cell resources used by different UEs in the same cell cluster from colliding, the same resource is allocated to only one UE at the same time, and cannot be allocated to other UEs again until the UE releases the resource. This would result in a smaller number of UEs being supported by the same cell cluster in case the total amount of cell resources is limited.
It can be seen that, in the prior art, under the condition that the total amount of cell resources is prioritized, a large number of UEs cannot be supported to complete fast handover.
Disclosure of Invention
The embodiment of the invention provides a resource allocation method and equipment of a satellite communication system, which can allocate the same cell resource to terminals in different cells in the same cell cluster under the condition that the total cell resource of the same cell cluster is limited, so that the method and the equipment can support more terminals to carry out quick switching.
In a first aspect, an embodiment of the present invention provides a resource allocation method for a satellite communication system, where the method includes:
the method comprises the steps that network side equipment determines at least one target cell to which at least two User Equipment (UE) need to be jointly switched according to the running direction of a satellite, wherein the at least two UE are located in the same cell cluster;
if the network side device determines that the at least two UEs are located in different cells in the cell cluster, pre-allocating a part of cell resources of each target cell in the at least one target cell to the at least two UEs, so that the at least two UEs share the same cell resource of the same target cell when switching to the same target cell.
In the embodiment of the invention, when the satellite runs at a high speed, at least two pieces of UE located in the same cell cluster need to frequently switch the connected target cell in order to keep good communication quality. In order to achieve fast handover, it is generally necessary to pre-configure cell resources of a target cell to be handed over for at least two UEs. Therefore, in the embodiment of the present invention, the network side device may determine, according to the movement direction of the satellite, at least one target cell to which the at least two UEs are required to be handed over together, and on this basis, if it is determined that the at least two UEs are located in different cells in the same cell cluster, part of cell resources of each target cell in the at least one target cell are configured to the at least two UEs in advance, so that the at least two UEs can share the same cell resource of the same target cell when being handed over to the same target cell. The method can improve the utilization rate of the cell resources under the condition that the total cell resources of the cell cluster are limited, so that the cell resources in the same cell cluster can support more UE to carry out rapid switching in a satellite communication system.
Optionally, the determining, by the network side device, that the at least two UEs are located in different cells in the cell cluster includes:
the network side equipment respectively determines longitude and latitude coordinates corresponding to each UE in the at least two UEs;
the network side equipment determines the distance between every two UE in the at least two UEs based on the longitude and latitude coordinates;
and if the network side equipment determines that the distances between every two pieces of UE are both larger than a first preset threshold value, determining that the at least two pieces of UE are respectively located in different cells in the cell cluster.
In the embodiment of the present invention, the UE continuously switches the target cell when the satellite is in high-speed motion, which is substantially that the UE switches between different satellite beams of the satellite, that is, each satellite beam corresponds to one target cell. Since the radius of coverage of each satellite beam is known, a first preset threshold may be determined based on the radius of coverage of the satellite beam. And then the network side device can determine whether the at least two UEs are located in different cells in the same cell cluster according to the acquired longitude and latitude coordinates of the at least two UEs in the same cell cluster. For example, if it is determined that the distances between two UEs in the at least two UEs are greater than the first preset threshold, it may be determined that the at least two UEs are located in different cells in the cell cluster.
Optionally, the determining, by the network side device, that the at least two UEs are located in different cells in the cell cluster includes:
the network side equipment respectively acquires a neighbor cell list of each UE current access cell in the at least two UEs;
and if the network side equipment determines that the cell accessed by each UE is not in the neighbor cell list corresponding to the other UEs, determining that the at least two UEs are respectively located in different cells in the cell cluster.
In the embodiment of the present invention, the neighbor cell list of each cell may be considered to record the identifier of the target cell to which the UE located in the current cell may be switched when the UE needs to be switched, and the respective neighbor cell lists corresponding to the neighbor cells are usually inter-configured, for example, if the cell a and the cell B are neighbor cells, then the identifier of the cell B is in the neighbor cell list of the cell a; similarly, the neighbor list of cell B also has the identifier of cell a. In this embodiment of the present invention, the network side device may obtain the neighbor cell lists of the cells accessed by each UE of the at least two UEs, respectively, and if the network side device determines that the cells accessed by each UE of the at least two UEs are not in the neighbor cell lists of other UEs, it may determine that the at least two UEs are located in different cells in the same cell cluster, respectively.
Optionally, the method further includes:
the number of the cell resources pre-configured for each UE in the at least two UEs by the network side equipment is less than or equal to a second preset threshold.
In the embodiment of the invention, when the satellite runs at a high speed, at least two pieces of UE located in the same cell cluster need to frequently switch the connected target cell in order to keep good communication quality. In order to realize fast handover, cell resources of a plurality of target cells to be handed over are generally required to be configured in advance for at least two UEs. However, in the embodiment of the present invention, the network side device may configure, for each UE of at least two UEs in the same cell cluster, a cell resource amount that is less than or equal to a second preset threshold in advance, that is, a part of cell resources of the target cell are not allocated to the at least two UEs, which results in a relatively slow handover process when the UE is handed over to the corresponding target cell, but the cell resources of the part of target cell may be allocated to other UEs, so that under the condition that the total amount of cell resources included in the same cell cluster is limited, a greater number of UEs are supported to complete fast handover. That is, the performance of the UE in handover is sacrificed in exchange for supporting a larger number of UEs to complete fast handover.
Optionally, the cell resource includes any one or a combination of more than one of the following:
physical Downlink Control Channel (PDCCH) resources;
physical uplink control channel, PUCCH, resources;
a channel Sounding Reference Signal (SRS) resource;
physical random access channel PRACH resources.
In the embodiment of the present invention, the cell resource pre-configured by the network side device for the UE may include any one or a combination of multiple types of PDCCH resource, PUCCH resource, SRS resource, and PRACH resource. The more complete the cell resources pre-configured by the UE, the lower the delay in performing the handover.
In a second aspect, an embodiment of the present invention provides a network-side device, where the device includes:
a first determining unit, configured to determine, according to an operating direction of a satellite, at least one target cell to which at least two user equipment UEs need to be jointly handed over, where the at least two UEs are located in a same cell cluster;
a second determining unit, configured to, when it is determined that the at least two UEs are located in different cells in the cell cluster, pre-configure a part of cell resources of each target cell in the at least one target cell to the at least two UEs, so that the at least two UEs share the same cell resource of the same target cell when switching to the same target cell.
Optionally, the second determining unit is specifically configured to:
respectively determining longitude and latitude coordinates corresponding to each UE in the at least two UEs;
determining a distance between two UEs of the at least two UEs based on the longitude and latitude coordinates;
and if the distances between every two pieces of UE are larger than a first preset threshold value, determining that the at least two pieces of UE are respectively positioned in different cells in the cell cluster.
Optionally, the second determining unit is specifically configured to:
respectively acquiring a neighbor cell list of each UE in the at least two UEs, which is currently accessed to the cell;
and if the cell accessed by each UE is determined not to be in the neighbor cell list corresponding to the other UEs, determining that the at least two UEs are respectively located in different cells in the cell cluster.
Optionally, the method further includes:
a configuration unit, configured to set the number of cell resources pre-configured for each UE of the at least two UEs to be less than or equal to a second preset threshold.
Optionally, the cell resource includes any one or a combination of more than one of the following:
physical Downlink Control Channel (PDCCH) resources;
physical uplink control channel, PUCCH, resources;
a channel Sounding Reference Signal (SRS) resource;
physical random access channel PRACH resources.
In a third aspect, an embodiment of the present invention provides a network-side device, where the apparatus includes a processor and a memory, and the execution of the computer program stored in the memory by the processor is a step of implementing the method according to the first aspect.
In a fourth aspect, an embodiment of the present invention provides a computer-readable storage medium, on which a computer program is stored, where the computer program, when executed by a processor, implements the steps of the method as described in the embodiment of the first aspect.
Drawings
Fig. 1 is a flowchart illustrating a resource allocation method of a satellite communication system according to an embodiment of the present invention;
fig. 2 is a schematic structural diagram of a cell cluster according to an embodiment of the present invention;
fig. 3 is a schematic structural diagram of a network device according to an embodiment of the present invention;
fig. 4 is a schematic structural diagram of a network-side device according to an embodiment of the present invention.
Detailed Description
In order to make the objects, technical solutions and advantages of the present invention more apparent, the present invention is described in further detail below with reference to the accompanying drawings and embodiments.
In a satellite communication system, the position of each UE may be mobile or fixed relative to the ground, for example, each UE may move on the ground and thus be located in different cells of the same cell cluster, or each UE may be fixed in the same geographical location all the time while the satellite is in a high-speed operation state, which requires that UEs located in the same cell cluster frequently switch between different satellite beams. It should be understood that the frequencies are not the same between different satellite beams. And because the cells covered by different satellite beams are different, the UE can also be considered to be handed over between different target cells.
In the prior art, in order to ensure the communication quality of the UE, a network side device may instruct the UE to complete fast handover based on Media Access Control (MAC) signaling or physical layer (PHY) signaling, but the premise that the fast handover is completed using MAC signaling or PHY signaling is that the UE needs to pre-configure cell resources of a plurality of target cells to be handed over, that is, the number of the cells to be handed over is equal to the number of the cell resources. And in order to ensure that the resources used by different UEs in the same cell cluster do not conflict, the same cell resource is only allocated to one UE at the same time, and the same cell resource cannot be allocated to other UEs again until the UE releases the cell resource. This results in a low utilization of cell resources under the condition that the total amount of cell resources included in the entire cell cluster is limited, and cannot support a large number of UEs to complete fast handover at the same time. On the contrary, if the cell Resource of the cell to be switched cannot be configured for the UE in advance, the network side device can only instruct the UE to complete the switching based on a Radio Resource Control (RRC) signaling. It should be understood that the time delay corresponding to using RRC signaling to instruct the UE to complete the handover is much larger than the time delay when using MAC signaling and PHY signaling to instruct the UE to complete the fast handover.
In view of this, an embodiment of the present invention provides a resource allocation method for a satellite communication system, where after at least one target cell to which at least two UEs need to be switched together is determined, as long as the at least two UEs are not located in the same cell cluster, a part of cell resources of each target cell in the at least one target cell may be pre-allocated to the at least two UEs, so that the at least two UEs may share the same cell resource of the same target cell when switching to the same target cell, thereby improving the utilization rate of the cell resources, and achieving the purpose of supporting a greater number of UEs to perform fast switching under the condition that the total amount of cell resources included in the cell cluster is limited.
The technical solution provided by the embodiment of the present invention is described below with reference to the accompanying drawings. Referring to fig. 1, the present invention provides a resource allocation method for a satellite communication system, where the flow of the method is described as follows:
step 101: the network side equipment determines at least one target cell to which at least two User Equipment (UE) need to be jointly switched according to the running direction of the satellite, and the at least two UE are located in the same cell cluster.
In the embodiment of the invention, along with the continuous movement of the satellite, at least two pieces of UE (user equipment) positioned in the same cell cluster need to be switched among different satellite beams. Since different satellite beams correspond to different target cells, it can also be considered that at least two UEs are handed over between different target cells. And since the positions of the at least two UEs may be different, the target cells respectively corresponding to each UE of the at least two UEs are also different.
As known in the art, when at least two UEs are handed over to different target cells, the cell resources configured for each UE in advance are different. For example, during the high-speed operation of the satellite, UE1 needs to be sequentially switched to target cell 1 and target cell 2, so to implement fast switching, it is necessary to allocate cell resource 1 of target cell 1 and cell resource 1 of target cell 2 to UE1 in advance, that is, when the same UE is switched to different target cells, different cell resources of target cells must be allocated in advance, and fast switching cannot be performed to other target cells under the condition that only cell resource of a certain target cell is configured. For example, when only the cell resource 1 of the target cell 1 is configured, the UE1 cannot perform fast handover to the target cell 2; similarly, even when only the cell resource 1 of the target cell 2 is configured, the UE1 cannot perform fast handover to the target cell 1. That is, when the UE is handed over to a different target cell, the pre-configured cell resources cannot be reused. If at least two UEs need to switch to the same target cell and the time for switching the at least two UEs to the same target cell is different, for example, UE1 is first switched to target cell 1, and when UE2 needs to switch to target cell 1, UE1 has already been switched to other target cells, for example, target cell 2, then when allocating cell resources of the target cell to the at least two UEs in advance, the same cell resource of target cell 1 may be allocated to each UE of the at least two UEs, that is, time division multiplexing of the same cell resource in target cell 1 is achieved, thereby improving the utilization rate of the cell resource. It should be understood that the cell resources may include any one or more of PDCCH resources, PUCCH resources, PRACH resources, and SRS resources, and the more complete the cell resources that are preconfigured by the UE, the lower the delay in performing the handover.
In view of this, in the embodiment of the present invention, it is determined whether the same cell resource of the same target cell is pre-allocated to the at least two UEs, and it is determined whether the at least two UEs have a common target cell to be handed over, so that the common cell resource of the target cell to be handed over can be pre-allocated to the at least two UEs.
In a possible implementation manner, the network side device may determine at least one target cell to which at least two UEs need to be jointly handed over according to the operation direction of the satellite.
For example, referring to fig. 2, the same cell cluster corresponds to four satellite beams, where satellite beam 1 corresponds to target cell 1, satellite beam 2 corresponds to target cell 2, satellite beam 3 corresponds to target cell 3, and satellite beam 4 corresponds to target cell 4. The UE switches between different satellite beams, which is equivalent to switching in different target cells. And according to the running direction of the satellite, it can be determined that the UE needs to be sequentially handed over from the target cell 1 to the target cell 4. If UE1 and UE2 exist currently, UE1 accesses from a target cell 1, and UE2 accesses from a target cell 3, then for UE1, switching from the target cell 1 to target cells 2-4 in sequence is needed; similarly, for UE2, it needs to switch from target cell 3 to target cell 4, and therefore there is a target cell 4 to which both need to be switched, then it can be considered that the same cell resource of target cell 4 is allocated to UE1 and UE2 in advance, so that UE1 and UE2 use the cell resource of target cell 4 to complete fast handover to target cell 4 at different times.
It should be understood that, in the present invention, the UE accessing the target cell may also be considered as a handover in a special case, and then, for the UE1, the handover is required to be performed to the target cell 3, and for the UE2, the handover is performed from the target cell 3, so that in order to improve the utilization rate of the cell resources in the target cell 3, as long as the UE1 and the UE2 are not both located in the target cell 3 within the same time period, the same cell resources of the target cell 3 may be shared.
Step 102: if the network side equipment determines that the at least two UEs are located in different cells in the cell cluster, pre-allocating part of cell resources of each target cell in the at least one target cell to the at least two UEs, so that the at least two UEs share the same cell resource of the same target cell when switching to the same target cell.
In the embodiment of the present invention, after preliminarily determining at least one target cell which is required to be switched and corresponds to at least two UEs in the same cell cluster, part of cell resources in each target cell in the at least one target cell may be allocated to the at least two UEs. Considering that if the at least two UEs are located in the same cell cluster, this means that the at least two UEs will perform handover to the same target cell at the same time, and at this time, if the two UEs are pre-allocated with the same cell resource of the target cell, a collision will be caused between the two UEs, so that fast handover cannot be completed.
In view of this, in the embodiment of the present invention, before pre-allocating a part of cell resources of each of at least one target cell to at least two UEs, it is further required to determine whether the at least two UEs are located in the same cell.
In a possible embodiment, the network side device determines whether the at least two UEs are located in the same cell cluster, and only when the network side device determines that the at least two UEs are located in different cells in the same cell cluster, the network side device can pre-allocate a part of cell resources of each target cell in the at least one target cell to the at least two UEs.
The network side device of the embodiment of the invention can determine whether at least two UEs are located in the same cell through the following two ways.
The first way, considering that the UE switches the target cell continuously while the satellite is in high-speed motion, is essentially that the UE switches between different satellite beams of the satellite, i.e. one target cell per satellite beam. Since the coverage radius of each satellite beam is known, a preset distance range may be determined based on the coverage radius of the satellite beam, for example, a first preset threshold, and a value of the first preset threshold may be determined according to an actual coverage radius of each satellite beam, which is not particularly limited herein. On this basis, the network side device may determine whether the at least two UEs are located in different cells in the same cell cluster according to the obtained longitude and latitude coordinates of the at least two UEs in the same cell cluster. For example, if it is determined that the distances between two UEs in the at least two UEs are greater than the first preset threshold, it may be determined that the at least two UEs are located in different cells in the cell cluster.
In the second way, it is considered that the neighbor cell list of each target cell may be considered to record the identifier of the target cell to which the UE located in the current target cell may be switched when the UE needs to be switched, and the respective neighbor cell lists corresponding to the neighbor target cells are usually inter-configured, for example, if the cell a and the cell B are neighbor cells, then the neighbor cell list of the cell a has the identifier of the cell B; similarly, the neighbor list of the cell B also has the identifier of the cell a. In this embodiment of the present invention, the network side device may obtain the neighbor cell lists of the cells accessed by each UE of the at least two UEs, respectively, and if the network side device determines that the cells accessed by each UE of the at least two UEs are not in the neighbor cell lists of other UEs, it may determine that the at least two UEs are located in different cells in the same cell cluster, respectively.
It should be understood that the network side device may use any one of the above two manners alone to determine whether at least two UEs in the same cell cluster are located in different cells in the same cell cluster, or may use both manners together, so as to make the determination result more accurate.
Referring to table 1, after determining that the at least two UEs are located in different cells in the same cell cluster, the network side device may allocate a part of cell resources of each target cell in the at least one target cell to the at least two UEs, so as to improve utilization of cell resources in a common target cell.
TABLE 1
| Target cell 1 | Target cell 2 | Target cell 3 | Target cell 4 | |
| UE1 | Cell resource 1 | Cell resource 1 | Cell resource 1 | Cell resource 1 |
| UE2 | Cell resource 1 | Cell resource 1 | ||
| UE3 | Cell resource 2 |
As can be seen from table 1, the network side device allocates the cell resources 1 of the target cells 1 to 4 to the UE1 in advance, and it should be understood that although a plurality of cell resources 1 are allocated to the UE1 in advance, the plurality of cell resources 1 come from different target cells, and therefore, the cell resources 1 corresponding to each target cell may be considered to be different. Similarly, the network side device pre-allocates the cell resource 1 of the target cells 3 and 4 to the UE2, because the UE1 and the UE2 have the target cells 3 and 4 that need to be switched together, and the network side device determines that the UE1 and the UE2 are located in different cells in the same cell cluster, so that the two can share the same cell resource when being switched to the target cells 3 and 4, respectively. It should be understood that UE1 and UE2 are handed over to target cells 3 and 4 in a sequential order in different time periods, so for any cell resource in target cells 3 and 4, UE1 and UE2 share the cell resource in different time periods, i.e. can be regarded as sharing the same cell resource by time. For UE3, if the network side device determines that UE2 and UE3 are located in the same cell cluster, then it cannot pre-configure cell resource 1 of target cell 4 for UE3, but can only configure other cell resources of target cell 4, for example, cell resource 2.
As can be seen from the foregoing solution, on the one hand, when the same UE is handed over to different target cells, it is necessary to pre-allocate cell resources of different target cells, and it is not possible to perform fast handover to other target cells under the condition that only cell resources of a certain target cell are configured. On the other hand, when at least two UEs need to switch to the same target cell and the at least two UEs are located in different cells in the same cell cluster, the at least two UEs may reuse the same cell resource of the same target cell, so as to increase the utilization rate of the cell resource as much as possible, and further support a larger number of UEs to complete fast handover under the condition that the cell resource is generally limited.
In view of this, in the embodiment of the present invention, the performance of part of the UEs during handover may be sacrificed to support a larger number of UEs to complete fast handover.
In a possible implementation manner, please refer to table 2, the network side device may pre-configure, for each UE of at least two UEs in the same cell cluster, the number of cell resources that are less than or equal to a second preset threshold, that is, although it is known that a certain UE needs to be handed over to a certain target cell, the cell resources of the target cell are not pre-allocated to the UE, so that when the UE needs to be handed over to the target cell, the handover process is relatively slow, that is, the performance of the UE during handover is reduced. On the basis, the cell resources from which the target cell appears idle can be allocated to other UEs in advance, thereby supporting a larger number of UEs to complete fast handover.
TABLE 2
As can be seen from table 2, the second preset threshold may be 3, UE1 originally needs to switch between target cells 1-4 in sequence, so to ensure fast switching of UE1, it is necessary to allocate cell resources of target cells 1-4 to UE1 in advance, but since the number of maximum allocable cell resources of UE1 is limited to 3, that is, it is impossible to allocate cell resources of target cell 4 to UE1, this means that when UE1 switches between target cells 1-3, fast switching (that is, switching based on MAC signaling or PHY signaling) can be achieved; when the target cell 3 is handed over to the target cell 4, fast handover (i.e. handover based on RRC signaling) cannot be achieved. Meanwhile, the cell resource 1 corresponding to the target cell 4 is in an unallocated state, and then the cell resource 1 can be allocated to other UEs, thereby achieving the purpose of supporting more UEs to complete fast handover.
Referring to fig. 3, based on the same inventive concept, an embodiment of the present invention provides a network-side device, where the network-side device includes: a first determining unit 201 and a second determining unit 202.
A first determining unit 201, configured to determine, according to an operation direction of a satellite, at least one target cell to which at least two user equipments UEs need to be jointly handed over, where the at least two UEs are located in a same cell cluster;
a second determining unit 202, configured to, when it is determined that the at least two UEs are located in different cells in the cell cluster, pre-configure a part of cell resources of each target cell in the at least one target cell to the at least two UEs, so that the at least two UEs share the same cell resource of the same target cell when switching to the same target cell.
Optionally, the second determining unit 202 is specifically configured to:
respectively determining longitude and latitude coordinates corresponding to each UE in the at least two UEs;
determining a distance between two UEs of the at least two UEs based on the longitude and latitude coordinates;
and if the distances between every two pieces of UE are larger than a first preset threshold value, determining that the at least two pieces of UE are respectively located in different cells in the cell cluster.
Optionally, the second determining unit 202 is specifically configured to:
respectively acquiring a neighbor cell list of each UE in the at least two UEs, which is currently accessed to the cell;
and if the cell accessed by each UE is determined not to be in the neighbor cell list corresponding to the rest of the UEs, determining that the at least two UEs are respectively located in different cells in the cell cluster.
Optionally, the method further includes:
a configuration unit, configured to set the number of cell resources pre-configured for each UE of the at least two UEs to be less than or equal to a second preset threshold.
Optionally, the cell resource includes any one or a combination of more than one of the following:
physical Downlink Control Channel (PDCCH) resources;
physical uplink control channel, PUCCH, resources;
a channel Sounding Reference Signal (SRS) resource;
physical random access channel PRACH resources.
Referring to fig. 4, based on the same inventive concept, an embodiment of the present invention provides a network-side device, where the device includes at least one processor 301, and the processor 301 is configured to execute a computer program stored in a memory, so as to implement the steps of the resource allocation method of the satellite communication system shown in fig. 1 provided in the embodiment of the present invention.
Alternatively, the processor 301 may be specifically a central processing unit, a specific ASIC, and may be one or more integrated circuits for controlling the execution of programs.
Optionally, the network side device may further include a memory 302 connected to the at least one processor 301, and the memory 302 may include a ROM, a RAM, and a disk memory. The memory 302 is used for storing data required by the processor 301 during operation, that is, storing instructions executable by the at least one processor 301, and the at least one processor 301 executes the method shown in fig. 1 by executing the instructions stored in the memory 302. The number of the memories 302 is one or more. The memory 302 is also shown in fig. 4, but it should be understood that the memory 302 is not an optional functional module, and is therefore shown in fig. 4 by a dotted line.
The physical devices corresponding to the first determining unit 201 and the second determining unit 202 may be the processor 301. The network side device may be configured to perform the method provided in the embodiment shown in fig. 1. Therefore, regarding the functions that can be realized by each functional module in the device, reference may be made to the corresponding description in the embodiment shown in fig. 1, which is not repeated herein.
Embodiments of the present invention further provide a computer storage medium, where the computer storage medium stores computer instructions, and when the computer instructions are executed on a computer, the computer is caused to execute the method as described in fig. 1.
It will be apparent to those skilled in the art that various changes and modifications may be made in the present application without departing from the spirit and scope of the application. Thus, if such modifications and variations of the present application fall within the scope of the claims of the present application and their equivalents, the present application is intended to include such modifications and variations as well.
Claims (10)
1. A method for resource allocation in a satellite communication system, the method comprising:
the method comprises the steps that network side equipment determines at least one target cell to which at least two User Equipment (UE) need to be jointly switched according to the running direction of a satellite, wherein the at least two UE are located in the same cell cluster;
if the network side device determines that the at least two UEs are located in different cells in the cell cluster, pre-allocating a part of cell resources of each target cell in the at least one target cell to the at least two UEs, so that the at least two UEs share the same cell resource of the same target cell when switching to the same target cell.
2. The method of claim 1, wherein the network-side device determining that the at least two UEs are located in different cells in the cell cluster comprises:
the network side equipment respectively determines longitude and latitude coordinates corresponding to each UE in the at least two UEs;
the network side equipment determines the distance between every two UE in the at least two UEs based on the longitude and latitude coordinates;
and if the network side equipment determines that the distances between every two pieces of UE are both larger than a first preset threshold value, determining that the at least two pieces of UE are respectively located in different cells in the cell cluster.
3. The method of claim 1, wherein the network-side device determining that the at least two UEs are located in different cells in the cell cluster comprises:
the network side equipment respectively acquires a neighbor cell list of each UE in the at least two UEs, which is currently accessed to the cell;
and if the network side equipment determines that the cell accessed by each UE is not in the neighbor cell list corresponding to the other UEs, determining that the at least two UEs are respectively located in different cells in the cell cluster.
4. The method of any one of claims 1-3, further comprising:
the number of the cell resources pre-configured for each UE in the at least two UEs by the network side equipment is less than or equal to a second preset threshold.
5. The method of claim 1, wherein the cell resources comprise a combination of any one or more of:
physical Downlink Control Channel (PDCCH) resources;
physical uplink control channel, PUCCH, resources;
a channel Sounding Reference Signal (SRS) resource;
physical random access channel PRACH resources.
6. A network-side device, the device comprising:
a first determining unit, configured to determine, according to an operation direction of a satellite, at least one target cell to which at least two user equipment UEs need to be jointly switched, where the at least two UEs are located in a same cell cluster;
a second determining unit, configured to, when it is determined that the at least two UEs are located in different cells in the cell cluster, pre-configure a part of cell resources of each target cell in the at least one target cell to the at least two UEs, so that the at least two UEs share the same cell resource of the same target cell when switching to the same target cell.
7. The device of claim 6, wherein the second determination unit is specifically configured to:
respectively determining longitude and latitude coordinates corresponding to each UE in the at least two UEs;
determining the distance between every two UE in the at least two UEs based on the longitude and latitude coordinates;
and if the distances between every two pieces of UE are larger than a first preset threshold value, determining that the at least two pieces of UE are respectively located in different cells in the cell cluster.
8. The device of claim 6, wherein the second determination unit is specifically configured to:
respectively acquiring a neighbor cell list of each UE in the at least two UEs, which is currently accessed to the cell;
and if the cell accessed by each UE is determined not to be in the neighbor cell list corresponding to the other UEs, determining that the at least two UEs are respectively located in different cells in the cell cluster.
9. A network-side device, comprising at least one processor and a memory coupled to the at least one processor, wherein the at least one processor is configured to implement the steps of the method according to any one of claims 1 to 5 when executing a computer program stored in the memory.
10. A computer-readable storage medium, on which a computer program is stored which, when being executed by a processor, carries out the steps of the method according to any one of claims 1 to 5.
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