CN114339820B - Communication method, device, equipment and readable storage medium in satellite communication network - Google Patents
Communication method, device, equipment and readable storage medium in satellite communication network Download PDFInfo
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Abstract
The embodiment of the application provides a communication method, a device, equipment and a readable storage medium in a satellite communication network, wherein the method comprises the following steps: and determining whether the control beam of the terminal needs to be switched, and informing the terminal of the first beam switching information if the control beam needs to be switched. In the embodiment of the application, the switching frequency can be effectively reduced, the interruption of service is reduced, and the continuity and stability of user service are improved.
Description
Technical Field
The embodiment of the application relates to the technical field of communication, in particular to a communication method, a device, equipment and a readable storage medium in a satellite communication network.
Background
In satellite mobile communication, because of a large coverage area and a large satellite power limitation, a broadcast control beam (abbreviated as a control beam) and a data transmission beam (abbreviated as a data beam) are generally configured separately, the broadcast control beam is responsible for access and mobility management of users, and the data transmission beam is only served for a specific direction and a specific user and is used for data traffic transmission. Because of the coverage areas of the broadcast control beam and the data transmission beam are different, the user frequently switches between the broadcast control beam and the data beam, which causes the beam connection problem of the user in the fast moving scene of the low orbit satellite, and the improper processing can cause the interruption of the communication service of the user or the increase of time delay. In practical applications, the control beam may also employ a beam-hopping or beam-scanning mechanism, resulting in frequent changes in the user and control beam connections.
Disclosure of Invention
An object of an embodiment of the present application is to provide a communication method, apparatus, device and readable storage medium in a satellite communication network, which solve the problem of how to switch beams in the satellite communication network.
In a first aspect, a beam switching method is provided, applied to a network side device in a satellite communication network, where the satellite communication network is configured with a control beam, and includes:
and determining whether the control beam of the terminal needs to be switched, and informing the terminal of the first beam switching information if the control beam needs to be switched.
Optionally, the determining whether the control beam of the terminal needs to be switched, if so, notifying the terminal of the first beam switching information includes:
determining whether the control beam of the terminal needs to be switched according to one or more of scanning pattern information of the control beam, the position of the terminal and a beam measurement result fed back by the terminal;
and if the control beam needs to be switched, informing the terminal of the index and/or the wave position index of the control beam to be switched.
Optionally, the method further comprises:
configuring beam measurement parameters of the terminal according to the scanning pattern information of the control beam;
And receiving a beam measurement result reported by the terminal, wherein the beam measurement result is obtained by the terminal based on the beam measurement parameters.
Optionally, the scan pattern information of the control beam includes one or more of:
the control beam service time of each wave position;
controlling the frequency of the beam;
the control beam index corresponding to each wave position,
a wave bit index for each wave bit.
Optionally, the determining whether the control beam of the terminal needs to be switched, if so, notifying the terminal of the first beam switching information includes:
determining whether the control beam of the terminal needs to be switched according to the switching scene of the terminal;
if the switching scene is inter-satellite switching or inter-cell switching, determining that the control beam of the terminal needs to be switched, and informing the terminal of the index of the control beam to be switched and/or the wave bit index of the control beam.
Optionally, the determining whether the control beam of the terminal needs to be switched, if so, notifying the terminal of the first beam switching information includes:
determining whether a control beam and a data beam of a terminal need to be switched according to the position of the network side equipment or the terminal;
If the position of the network side equipment or the position of the terminal changes, determining that the control beam to be switched corresponding to the position of the terminal is switched and the data beam is not switched;
and notifying the terminal of information of the control beam to be switched, wherein the information comprises at least one of a control beam index and a wave position index of the control beam.
Optionally, the method further comprises:
and determining whether the data beam needs to be switched, and informing the terminal of second beam switching information if the data beam needs to be switched.
Optionally, the determining whether the data beam needs to be switched, if the data beam needs to be switched, notifying the terminal of the second beam switching information, includes:
determining whether the data beam of the terminal needs to be switched according to the position of the network side equipment or the terminal;
and if the position of the network side equipment or the terminal is changed, the data beam is adjusted, and the information of the adjusted data beam is notified to the terminal.
Optionally, the determining whether the data beam needs to be switched, if the data beam needs to be switched, notifying the terminal of the second beam switching information, includes:
determining whether the data beam of the terminal needs to be switched across the satellite according to the position change of the network side equipment or the terminal or the signal measurement result of the adjacent satellite;
And if the position of the network side equipment or the terminal changes or the signal measurement result of the adjacent satellite triggers the cross-satellite switching, enabling the terminal to be connected to a data beam under the adjacent satellite, and informing the position information or ephemeris information or time-frequency compensation information of the adjacent satellite to the terminal.
Optionally, determining whether the data beam of the terminal needs to be switched, and if the data beam needs to be switched, notifying the terminal of second beam switching information includes:
judging whether the data beam of the terminal needs to be switched according to whether the terminal transmits data in a preset time period;
and if the terminal does not transmit data in a preset time period, determining that the terminal releases the connection with the data beam, informing the terminal of the information of the control beam to be switched, and returning the terminal to the control beam.
Optionally, the network side device includes an on-board communication device, or an over-the-air communication platform.
In a second aspect, a beam switching method is provided, applied to a terminal in a satellite communication network configured with a control beam, including:
it is determined whether the control beam needs to be switched, and if so, a new control beam is switched.
Optionally, the determining whether the control beam needs to be switched, if so, notifying the terminal of the beam switching information includes:
determining whether the control beam needs to be switched according to one or more of scanning pattern information of the control beam, the position of the network side equipment, the position of the terminal and a beam measurement result;
if the control beam needs to be switched, then switching to a new control beam.
Optionally, the method further comprises:
receiving beam measurement parameters, wherein the beam measurement parameters are configured by network side equipment according to scanning pattern information of control beams;
and measuring according to the beam measurement parameters to obtain a beam measurement result.
Optionally, the scan pattern information of the control beam includes one or more of:
the control beam service time of each wave position;
a control beam index corresponding to each wave bit;
a wave bit index for each wave bit;
the frequency of the beam is controlled.
Optionally, the determining whether the control beam needs to be switched, if the control beam needs to be switched, switching to a new control beam includes:
determining whether the control beam needs to be switched according to the switching scene of the terminal;
If the switching scene is the cross-star switching or the cross-cell switching, determining that the control beam needs to be switched;
and switching to a new control beam according to the control beam index and/or the wave position index to be switched, which are indicated by the network side equipment.
Optionally, when coverage areas of the uplink control beam and the downlink control beam of the control beam are inconsistent, the downlink control beam and the uplink control beam perform separate switching, or when the beams are switched, a plurality of downlink beams or a plurality of uplink beams are aggregated, and the plurality of beams are uniformly switched.
In a third aspect, a beam switching apparatus is provided, which is applied to a network side device in a satellite communication network, where the satellite communication network is configured with a control beam, and includes:
and the first processing module is used for determining whether the control beam of the terminal needs to be switched, and informing the terminal of the first beam switching information if the control beam needs to be switched.
In a fourth aspect, there is provided a beam switching device for use in a terminal in a satellite communications network configured with a control beam, comprising:
and the third processing module is used for determining whether the control beam needs to be switched, and switching to a new control beam if the control beam needs to be switched.
In a fifth aspect, a network-side device is provided, including: a first processor, a first transceiver and a first memory;
a first transceiver for receiving and transmitting data under the control of the first processor;
the first processor is configured to determine whether a control beam of the terminal needs to be switched, and notify the terminal of first beam switching information if the control beam needs to be switched.
In a sixth aspect, there is provided a terminal comprising: a second processor, a second transceiver and a second memory;
a second transceiver for receiving and transmitting data under the control of a second processor;
the second processor is configured to determine whether the control beam needs to be switched, and switch to a new control beam if the control beam needs to be switched.
In a seventh aspect, there is provided a readable storage medium having stored thereon a computer program which when executed by a processor performs steps comprising the method according to the first or second aspect.
In the embodiment of the application, the switching frequency can be effectively reduced, the interruption of service is reduced, and the continuity and stability of user service are improved.
Drawings
Various other advantages and benefits will become apparent to those of ordinary skill in the art upon reading the following detailed description of the preferred embodiments. The drawings are only for purposes of illustrating the preferred embodiments and are not to be construed as limiting the application. Also, like reference numerals are used to designate like parts throughout the figures. In the drawings:
FIG. 1 is one of the flowcharts of a communication method in a satellite communication network according to an embodiment of the present application;
FIG. 2 is a second flowchart of a communication method in a satellite communication network according to an embodiment of the application;
FIG. 3 is a schematic diagram of control beam and data beam coverage in accordance with an embodiment of the present application;
FIG. 4 is a time division multiplexed scan of control beams according to an embodiment of the present application;
fig. 5 is a schematic diagram of uplink-downlink coverage imbalance of a control beam according to an embodiment of the present application;
FIG. 6 is a schematic diagram of a communication device according to an embodiment of the application;
FIG. 7 is a second schematic diagram of a communication device according to an embodiment of the application;
fig. 8 is a schematic diagram of a network side device according to an embodiment of the present application;
fig. 9 is a schematic diagram of a terminal according to an embodiment of the present application.
Detailed Description
The combination of satellite communications with terrestrial mobile communications has become an important technological trend, and satellite communications may use satellite-borne base stations or establish communications links with terrestrial gateway stations to support wide area coverage. In conventional satellite communications, there are a number of ways in which satellite beams operate, one being a fixed beam, i.e. the beam's pointing direction is fixed, but moves with the movement of the satellite, so as to form a continuous coverage over the ground; the second is to use a hop beam, where the beam pointing direction can be dynamically changed, and the beam can be covered at different geographic locations based on the need. Based on the above two kinds of beam, two kinds of beams, namely a control beam and a data beam, are further derived based on the difference of transmission information and coverage. To reduce power consumption of satellites and interference of signals between satellites, the control beam and the data beam may employ a beam scanning mechanism or an on-demand service mechanism. Based on the mixed usage scenario of control beams and data beams, the beam switching problems faced are as follows:
(1) How does a smooth handoff remain with control of beam sweep hops?
(2) How does traffic continuity be maintained in the case of data beam hopping handoff?
(3) How does the user maintain the stability of the connection when switching between control and data beams?
(4) How does service continuity be maintained when the beam to be switched of the control beam changes during data transmission?
The following description of the embodiments of the present application will be made clearly and fully with reference to the accompanying drawings, in which it is evident that the embodiments described are some, but not all embodiments of the application. All other embodiments, which can be made by those skilled in the art based on the embodiments of the application without making any inventive effort, are intended to be within the scope of the application.
The terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, system, article, or apparatus that comprises a list of steps or elements is not necessarily limited to those steps or elements but may include other steps or elements not expressly listed or inherent to such process, method, article, or apparatus. Furthermore, the use of "and/or" in the specification and claims means at least one of the connected objects, e.g., a and/or B, meaning that it includes a single a, a single B, and that there are three cases of a and B.
In embodiments of the application, words such as "exemplary" or "such as" are used to mean serving as an example, instance, or illustration. Any embodiment or design described herein as "exemplary" or "e.g." in an embodiment should not be taken as preferred or advantageous over other embodiments or designs. Rather, the use of words such as "exemplary" or "such as" is intended to present related concepts in a concrete fashion.
The beam switching information in the embodiment of the application comprises uplink beam switching information and/or downlink beam switching information.
The technical scheme provided by the embodiment of the application can be suitable for various systems, in particular to a 5G system. For example, applicable systems may be global system for mobile communications (Global System of Mobile communication, GSM), code division multiple access (Code Division Multiple Access, CDMA), wideband code division multiple access (Wideband Code Division Multiple Access, WCDMA), time division synchronous CDMA (Time Division Synchronous Code Division Multiple Access, TD-SCDMA), general packet Radio service (general packet Radio service, GPRS), long term evolution (long term evolution, LTE) including TD-LTE and FDD LTE, long term evolution-advanced (long term evolution advanced, LTE-a), universal mobile system (universal mobile telecommunication system, UMTS), worldwide interoperability for microwave access (worldwide interoperability for microwave access, wiMAX), new air interface (New Radio, NR) systems, and the like. Terminal devices and network devices are included in these various systems. Core network parts may also be included in the system, such as evolved packet system (Evolved Packet System, EPS), 5G system (5 GS/5 GC), etc.
Referring to fig. 1, an embodiment of the present application provides a beam switching method applied to a network side device, such as a satellite communication device or an air communication platform, in a satellite communication network, where the satellite communication network is configured with a control beam, and the method may be used for broadcasting information and access control, and specifically includes the steps of:
step 101: and determining whether the control beam of the terminal needs to be switched, and informing the terminal of the first beam switching information if the control beam needs to be switched.
The satellite communication network configures two beams, the first beam is a control beam, the cyclic scanning service is performed on different wave positions in a scanning mode, and the second beam is a data beam, and the data beam is sent on demand based on the requirements of users.
Typically, the control beam corresponds to a primary carrier (primary cell), the data beam corresponds to a secondary carrier (secondary cell), and the two beams are cooperatively transmitted in a carrier aggregation manner. Another alternative configuration is: the control beam corresponds to initial BWP (initial Bandwidth part) and the data beam corresponds to active BWP (active BWP). The initial BWP refers to a carrier wave used for initial access and data transmission of the user, and the active BWP notifies the user to switch to the active BWP when the user has large data transmission, and then performs data transmission.
It is understood that the first beam switching information may be switching information of an uplink control beam and/or switching information of a downlink control beam.
In some embodiments, the network side device may determine, according to one or more of scan pattern information of the control beam, a position of the terminal, and a beam measurement result fed back by the terminal, whether the control beam of the terminal needs to be switched; and if the control beam needs to be switched, informing the terminal of the index and/or the wave position index of the control beam to be switched.
It is understood that the index of the control beam to be switched may be the index of the control beam to be switched uplink and/or the index of the control beam to be switched downlink.
The control beam index may include an index of the control beam itself, or may include a joint index of the beam and the wave position, where the beam refers to only a physical beam and does not include information of the wave position index.
Optionally, the method further comprises: configuring beam measurement parameters of the terminal according to the scanning pattern information of the control beam; and receiving a beam measurement result reported by the terminal, wherein the beam measurement result is obtained by the terminal based on the beam measurement parameters.
Further, the scan pattern information of the control beam may include one or more of: (1) a control beam service time for each wave position; (2) controlling the frequency of the beam; (3) a control beam index corresponding to each wave bit; (4) The wave bit index (or wave bit number) of each wave bit.
In the indication information of the scanning pattern, there is a scene that the control beam covers a plurality of wave positions, the wave positions are associated with the spatial beam directions, from the perspective of signaling design, the terminal can be told of the beam index, the beam index is mapped to the beam frequency, the wave position number and the service time window, and the terminal can infer the wave position number and the service time window based on the beam index. There is also an index of the control beam representing only the frequency of the control beam, while the wave-position numbers are indicated separately, and the wave-position numbers and the service time windows are in one-to-one correspondence. The 4 kinds of information are thus related to specific signaling designs, and the final purpose is to inform the terminal which control beam is served by, including frequency, time, beam direction, etc.
In some embodiments, the network side device may determine, according to a handover scenario of the terminal, whether a control beam of the terminal needs to be switched; if the switching scene is inter-satellite switching or inter-cell switching, determining that the control beam of the terminal needs to be switched, and informing the terminal of the index and/or the wave position index of the control beam to be switched.
In some embodiments, the network side device may determine, according to the location of the network side device or the terminal, whether the control beam and the data beam of the terminal need to be switched; if the position of the network side equipment or the position of the terminal changes, determining that the control beam to be switched corresponding to the position of the terminal is switched and the data beam is not switched; and notifying the terminal of the information of the control beam to be switched.
In the above embodiment, the information of the control beam to be switched includes information of a control index, a frequency point, a wave position, and the like.
In some embodiments, the method further comprises: and determining whether the data beam needs to be switched, and informing the terminal of second beam switching information if the data beam needs to be switched.
Optionally, the network side device may determine, according to the location of the network side device or the terminal, whether the data beam of the terminal needs to be switched (for example, intra-satellite switching is adopted in a shorter time interval of service transmission); and if the position of the network side equipment or the terminal is changed, the data beam is adjusted, and the information of the adjusted data beam is notified to the terminal.
Optionally, the network side device determines whether the data beam of the terminal needs to be switched across satellites (i.e. the terminal can be switched to the adjacent satellite) according to the position change of the network side device or the terminal or the measurement result of the adjacent satellite signals; if the position of the network side equipment or the terminal changes or the measurement result triggers the cross-satellite switching, switching the data beam connected with the terminal so that the terminal is connected with the data beam under the adjacent satellite, and notifying the position information or ephemeris information or time-frequency compensation information of the adjacent satellite to the terminal.
In the prior art, the data beam in the satellite is mainly switched, the terminal cannot support the data beam switching from one satellite to the data beam of the adjacent satellite, and the terminal needs to be switched back to the control beam from the data beam; however, due to the resource limitation and transmission delay of the control beam, the switching time delay of the terminal from one data beam to another satellite can be effectively reduced, the data transmission efficiency is improved, and the user experience is improved.
When a terminal switches from the data beam of one satellite to the data beam of another adjacent satellite, the signal synchronization process to the adjacent satellite needs to be completed. The method comprises the following specific steps of:
(1) The terminal acquires adjacent satellite information indicated by the network, wherein the adjacent satellite information comprises position information, time frequency offset information, ephemeris information, time frequency compensation information and the like;
(2) The terminal measures the downlink synchronous signal or the reference signal of the adjacent satellite, so that the terminal can keep downlink synchronization with the adjacent satellite;
(3) Based on the adjacent satellite information and the downlink synchronization detection, the terminal can acquire uplink time-frequency synchronization deviation information connected with the adjacent satellite, and then send a physical random access channel (Physical Random Access Channel, PRACH) signal to the adjacent satellite
(4) The adjacent satellite performs subsequent handover operations after receiving the PRACH signal of the terminal.
Optionally, the network side device may determine whether the data beam of the terminal needs to be switched according to whether the terminal transmits data in a predetermined period of time; and if the terminal does not transmit data in a preset time period, determining that the terminal releases the connection with the data beam, informing the terminal of the information of the control beam to be switched, and returning the terminal to the control beam.
In the embodiment of the application, the switching frequency can be effectively reduced, the interruption of service is reduced, and the continuity and stability of user service are improved.
Referring to fig. 2, an embodiment of the present application provides a beam switching method, which is applied to a terminal in a satellite communication network, where the satellite communication network is configured with a control beam, and the specific steps include: step 201.
Step 201: it is determined whether the control beam needs to be switched, and if so, a new control beam is switched.
In some embodiments, the terminal may determine whether the control beam needs to be switched according to one or more of scan pattern information of the control beam, a location of the network side device, a location of the terminal, and a beam measurement result; if the control beam needs to be switched, then switching to a new control beam.
Optionally, the method further comprises: receiving beam measurement parameters, wherein the beam measurement parameters are configured by network side equipment according to scanning pattern information of control beams; and measuring according to the beam measurement parameters to obtain a beam measurement result.
Optionally, the scan pattern information of the control beam includes one or more of: (1) a control beam service time for each wave position; (2) a control beam index corresponding to each wave bit; (3) controlling the frequency of the beam; (4) The wave bit index (or wave bit number) of each wave bit.
In some embodiments, the terminal may determine, according to a handover scenario of the terminal, whether the control beam needs to be switched; if the switching scene is the cross-star switching or the cross-cell switching, determining that the control beam needs to be switched; and switching to a new control beam according to the control beam index and/or the wave position index to be switched, which are indicated by the network side equipment.
In some embodiments, when the coverage areas of the uplink control beam and the downlink control beam of the control beam are inconsistent, the downlink control beam and the uplink control beam perform separate switching, or when the beams are switched, a plurality of downlink beams or a plurality of uplink beams are aggregated, and the plurality of beams are uniformly switched.
In the embodiment of the application, the switching frequency can be effectively reduced, the interruption of service is reduced, and the continuity and stability of user service are improved.
Example 1: configuration of control and data beams
In satellite communication networks, control beam and data beam splitting designs are employed in order to save power in satellite signal transmissions. The coverage area of the control beam is relatively large and the coverage area of the data beam is relatively small, and the control beam and the data beam are matched, so that the coverage area of one control beam usually comprises a plurality of data beams.
As shown in fig. 3, the coverage area of one control beam is called a wave bit, and the beam is sent from the satellite side, one satellite beam can only cover one wave bit at a time, and when the number of wave bits is larger than that of the beam, a single beam needs to cover a plurality of wave bits in a time division scanning mode. From the terminal's perspective, different wave positions correspond to different wave beam indexes, because even though the same wave beam serves a plurality of wave positions, different wave positions are served at different times, and therefore are the same wave beam from the network's perspective, but from the terminal's perspective, different wave positions are served by different wave beams.
For the data beam, the network side needs to send the data beam according to the need on the basis of the position information reported by the terminal, the data beam is still divided by the wave position, and the network sends a beam to cover the wave position where the terminal is located for data service. When the satellite is moving, the beam direction vector needs to be adjusted to ensure that the same beam can still support the same terminal when the satellite moves.
Example 2: the control beam switching method comprises the following steps:
based on the above-mentioned control beam allocation strategy, when the satellite moves, it is necessary to consider both the switching and application methods in various scenarios.
Scene 1: and the network side makes a beam switching decision.
The switching method comprises the following steps: the network determines whether the terminal is switched based on the terminal position information and the beam scanning pattern, and informs the terminal of a control beam index to be switched.
The implementation steps are as follows:
(1) The network configures the scanning pattern of the satellite control wave beam and informs the terminal;
the scan pattern information includes a control beam service time, a frequency of a control beam, a beam index corresponding to the beam, and the like for each beam.
(2) The terminal reports the own position information to the network;
(3) The network judges whether the terminal service beam is switched or not based on the beam scanning pattern, the position information of the terminal and the moving direction of the terminal, and when the switching occurs, the network informs the terminal of the beam switching information;
(4) When the wave bit of the service changes but the wave beam is unchanged, the notified switching information comprises a wave beam index corresponding to the new wave bit; when the physical beam of the service is changed but the frequency is not changed, only the beam index or the wave position information is notified, and if the adopted frequency point serves the user, new frequency information needs to be contained.
As can be seen from fig. 4, one control beam scans B1, B2, B3, and B4 4 wave positions, and based on the moving direction of the satellite, it is assumed that when the user is in the B2 wave position, B1 of the wave position is served after the subsequent handover, and the service time corresponding to B1 is a T1 time period, so when the position of the satellite moves, the service range of the satellite control beam also moves, and the network can use the beam corresponding to the B1 wave position to serve the user based on the position of the terminal and the direction of the control beam, that is, the T1 time period under the same control beam, and the corresponding beam index is the beam index corresponding to B1.
In some embodiments, the same physical control beam can serve different wave positions, when the terminal switches to a new wave position, the network informs the wave position index information, and after the terminal obtains the wave position index information, the terminal can determine the time information of the beam service.
Meanwhile, the network can perform auxiliary decision information of switching based on measurement feedback information of the terminal. Radio resource management (Radio Resource Management, RRM) measurements may be used, or signal to interference plus noise ratio (Signal to Interference plus Noise Ratio, SINR) measurements may be used, when the network configures the terminal measurements. The network needs to configure the signal measuring wave beam and wave position of the terminal based on the position information of the user and the wave beam scanning pattern, and when the terminal measures, the measured value is fed back to assist the network to switch.
Scene 2: terminal side beam switching decision
The implementation method comprises the following steps: when the terminal obtains the beam scanning pattern configured by the network, based on the motion track of the satellite and the position of the terminal, the next beam or wave position to serve the terminal can be judged, then the terminal is automatically switched to a new beam, and after the switching is finished, the terminal needs to inform the network that the beam switching is finished. At this time, the terminal may also perform beam measurement in advance, acquire measurement information and perform auxiliary switching, and when the signal strength of the new service beam is greater than or equal to the signal strength of the original service beam, the terminal autonomously switches to the new control beam.
Scene 3: cross-star handoff
The switching indication method comprises the following steps: when the terminal is switched across satellites, the terminal needs to be reconnected to the control beam under the new satellite. In order for the network to inform the terminal of the control beam index to be switched in the switching message in advance based on the position information of the terminal, the switching process of the terminal can be accelerated.
Scene 4: the coverage area of the downlink control beam is inconsistent with that of the uplink control beam.
When the coverage of the downlink control beam and the uplink control beam of the control beam is inconsistent, the separation and the switching of the downlink control beam and the uplink control beam are supported, or a plurality of uplink control beams are combined for receiving, so that the switching of the downlink control beam and the uplink control beam is consistent.
As shown in fig. 5, the downstream control beam has a larger wave position than the upstream control wave position, which results in switching of the upstream wave position more frequently than the downstream switching. In order to solve the problem, the uplink control beams can be bound in beam groups, that is, all uplink control beams in the range of one downlink control beam are aggregated, any uplink control beam can receive uplink signals of the terminal and is considered to be in the same uplink control beam, no uplink control beam switching occurs, at this time, a joint detection method is needed, and the network considers that the beams are not switched when detecting effective uplink signals from any uplink control beam.
Example 3: the data beam switching method comprises the following steps:
scene 1: satellite movement or terminal movement causes handoff of data beams
The implementation method comprises the following steps: when a terminal is connected to a data beam, the network needs to adjust the data beam when satellite movement causes the serving data beam to be out of coverage: either the beamforming vector is updated using the same beam or the terminal is served with another beam.
Scene 2: controlling beam switching while data beam does not
The implementation method comprises the following steps: when the control beam to be switched corresponding to the position of the terminal is switched but the data beam of the service is not changed, in order to reduce the influence of the switching on the data service, the terminal does not switch the beam at the moment; the network determines the corresponding control beam based on the position information or the measurement information of the user, informs the updated control beam to be switched, and the terminal is still connected with the original data beam; after acquiring the information of the control beam to be switched, the terminal is used for switching to the control beam to be switched after the subsequent data transmission is completed.
Scene 3: the terminal returning from the data beam to the control beam
The implementation method comprises the following steps: when the terminal returns from the data beam to the control beam, the terminal and the control beam to be switched establish synchronization based on the control beam to be switched configured by the network and reside in the control beam to be switched.
The realization steps are as follows:
(1) The network determines the beam index and related information of the control beam based on the position information of the terminal or the measurement report of the terminal;
(2) When the terminal does not transmit data within a predetermined time, the network informs the terminal to return to the control beam;
(3) The terminal establishes synchronization with the control beam to be switched and resides in the control beam to be switched.
Referring to fig. 6, an embodiment of the present application provides a beam switching apparatus applied to a network side device in a satellite communication network, where the satellite communication network is configured with a control beam, and the apparatus 600 includes:
a first processing module 601, configured to determine whether a control beam of the terminal needs to be switched, and notify the terminal of first beam switching information if the control beam needs to be switched.
In an embodiment of the present application, the first processing module 601 is further configured to: determining whether the control beam of the terminal needs to be switched according to one or more of scanning pattern information of the control beam, the position of the terminal and a beam measurement result fed back by the terminal; and if the control beam needs to be switched, informing the terminal of the index and/or the wave position index of the control beam to be switched.
In an embodiment of the present application, the apparatus 600 further includes:
The configuration module is used for configuring beam measurement parameters of the terminal according to the scanning pattern information of the control beam;
the first receiving module is used for receiving the beam measurement result reported by the terminal, wherein the beam measurement result is obtained by the terminal based on the beam measurement parameter measurement.
In an embodiment of the present application, the scan pattern information of the control beam includes one or more of the following: the control beam service time of each wave position; controlling the frequency of the beam; a control beam index corresponding to each wave bit; a wave bit index for each wave bit.
In an embodiment of the present application, the first processing module 601 is further configured to: determining whether the control beam of the terminal needs to be switched according to the switching scene of the terminal; if the switching scene is inter-satellite switching or inter-cell switching, determining that the control beam of the terminal needs to be switched, and informing the terminal of the index of the control beam to be switched and/or the wave bit index of the control beam.
In an embodiment of the present application, the first processing module 601 is further configured to: determining whether a control beam and a data beam of a terminal need to be switched according to the position of the network side equipment or the terminal; if the position of the network side equipment or the position of the terminal changes, determining that the control beam to be switched corresponding to the position of the terminal is switched and the data beam is not switched; and notifying the terminal of information of the control beam to be switched, wherein the information comprises at least one of a control beam index and a wave position index of the control beam.
In an embodiment of the present application, the apparatus 600 further includes: and the second processing module is used for determining whether the data beam needs to be switched, and informing the terminal of second beam switching information if the data beam needs to be switched.
In an embodiment of the present application, the second processing module is further configured to: determining whether the data beam of the terminal needs to be switched according to the position of the network side equipment or the terminal; and if the position of the network side equipment or the terminal is changed, the data beam is adjusted, and the information of the adjusted data beam is notified to the terminal.
In an embodiment of the present application, the second processing module is further configured to: determining whether the data beam of the terminal needs to be switched across the satellite according to the position change of the network side equipment or the terminal or the signal measurement result of the adjacent satellite; and if the position of the network side equipment or the terminal changes or the signal measurement result of the adjacent satellite triggers the cross-satellite switching, enabling the terminal to be connected to a data beam under the adjacent satellite, and informing the position information or ephemeris information or time-frequency compensation information of the adjacent satellite to the terminal.
In an embodiment of the present application, the second processing module is further configured to: judging whether the data beam of the terminal needs to be switched according to whether the terminal transmits data in a preset time period; and if the terminal does not transmit data in a preset time period, determining that the terminal releases the connection with the data beam, informing the terminal of the information of the control beam to be switched, and returning the terminal to the control beam.
In the embodiment of the application, the network side equipment comprises satellite-borne communication equipment or an aerial communication platform.
The device provided by the embodiment of the present application may execute the method embodiment shown in fig. 1, and its implementation principle and technical effects are similar, and this embodiment will not be described herein.
Referring to fig. 7, an embodiment of the present application provides a beam switching apparatus applied to a terminal in a satellite communication network configured with a control beam, the apparatus 700 comprising:
a third processing module 701 is configured to determine whether the control beam needs to be switched, and if the control beam needs to be switched, switch to a new control beam.
In an embodiment of the present application, the third processing module is further configured to: determining whether the control beam needs to be switched according to one or more of scanning pattern information of the control beam, the position of the network side equipment, the position of the terminal and a beam measurement result; if the control beam needs to be switched, then switching to a new control beam.
In an embodiment of the present application, the apparatus 700 further includes:
the second receiving module is used for receiving beam measurement parameters, and the beam measurement parameters are configured by the network side equipment according to the scanning pattern information of the control beam; and measuring according to the beam measurement parameters to obtain a beam measurement result.
In an embodiment of the present application, the scan pattern information of the control beam includes one or more of the following: the control beam service time of each wave position; a control beam index corresponding to each wave bit; controlling the frequency of the beam; a wave bit index for each wave bit.
In an embodiment of the present application, the third processing module 701 is further configured to: determining whether the control beam needs to be switched according to the switching scene of the terminal; if the switching scene is the cross-star switching or the cross-cell switching, determining that the control beam needs to be switched; and switching to a new control beam according to the control beam index and/or the wave position index to be switched, which are indicated by the network side equipment.
In the embodiment of the application, when the coverage areas of the uplink control beam and the downlink control beam of the control beam are inconsistent, the downlink control beam and the uplink control beam execute separation switching, or when the beams are switched, a plurality of downlink beams or a plurality of uplink beams are aggregated, and the beams are uniformly switched.
The device provided by the embodiment of the present application may execute the method embodiment shown in fig. 2, and its implementation principle and technical effects are similar, and this embodiment will not be described herein.
Referring to fig. 8, an embodiment of the present application provides a network side device 800, including: a first transceiver 801, a first processor 802, and a first memory 803;
The first transceiver 801 transmits and receives data under the control of the first processor 802;
the first processor 802 reads the program in the first memory 803 to perform the following operations: and determining whether the control beam of the terminal needs to be switched, and informing the terminal of the first beam switching information if the control beam needs to be switched.
The network side device provided in the embodiment of the present application may execute the method embodiment shown in fig. 1, and its implementation principle and technical effects are similar, and this embodiment will not be described herein.
Referring to fig. 9, an embodiment of the present application provides a terminal 900 including: a second transceiver 901, a second processor 902, and a second memory 903;
the first transceiver 901 transmits and receives data under the control of the first processor 902;
the first processor 902 reads the program in the first memory 903 to perform the following operations: it is determined whether the control beam needs to be switched, and if so, a new control beam is switched.
The terminal provided by the embodiment of the present application may execute the method embodiment shown in fig. 2, and its implementation principle and technical effects are similar, and this embodiment will not be described herein.
The embodiment of the present application further provides a readable storage medium, where a program or an instruction is stored, where the program or the instruction realizes each process of the method embodiment shown in fig. 1 or fig. 2 and can achieve the same technical effect when executed by a processor, and in order to avoid repetition, a description is omitted herein.
The steps of a method or algorithm described in connection with the present disclosure may be embodied in hardware, or may be embodied in software instructions executed by a processor. The software instructions may be comprised of corresponding software modules that may be stored in RAM, flash memory, ROM, EPROM, EEPROM, registers, hard disk, a removable disk, a read-only optical disk, or any other form of storage medium known in the art. An exemplary storage medium is coupled to the processor such the processor can read information from, and write information to, the storage medium. In the alternative, the storage medium may be integral to the processor. The processor and the storage medium may reside in an ASIC. In addition, the ASIC may be located in a core network interface device. The processor and the storage medium may reside as discrete components in a core network interface device.
Those skilled in the art will appreciate that in one or more of the examples described above, the functions described in the present invention may be implemented in hardware, software, firmware, or any combination thereof. When implemented in software, these functions may be stored on or transmitted over as one or more instructions or code on a computer-readable medium. Computer-readable media includes both computer storage media and communication media including any medium that facilitates transfer of a computer program from one place to another. A storage media may be any available media that can be accessed by a general purpose or special purpose computer.
The foregoing embodiments have been provided for the purpose of illustrating the general principles of the present application in further detail, and are not to be construed as limiting the scope of the application, but are merely intended to cover any modifications, equivalents, improvements, etc. based on the teachings of the application.
It will be appreciated by those skilled in the art that embodiments of the present application may be provided as a method, system, or computer program product. Accordingly, embodiments of the present application may take the form of an entirely hardware embodiment, an entirely software embodiment or an embodiment combining software and hardware aspects. Furthermore, embodiments of the application may take the form of a computer program product on one or more computer-usable storage media (including, but not limited to, disk storage, CD-ROM, optical storage, etc.) having computer-usable program code embodied therein.
Embodiments of the present application are described with reference to flowchart illustrations and/or block diagrams of methods, apparatus (systems) and computer program products according to embodiments of the application. It will be understood that each flow and/or block of the flowchart illustrations and/or block diagrams, and combinations of flows and/or blocks in the flowchart illustrations and/or block diagrams, can be implemented by computer program instructions. These computer program instructions may be provided to a processor of a general purpose computer, special purpose computer, embedded processor, or other programmable data processing apparatus to produce a machine, such that the instructions, which execute via the processor of the computer or other programmable data processing apparatus, create means for implementing the functions specified in the flowchart flow or flows and/or block diagram block or blocks.
These computer program instructions may also be stored in a computer-readable memory that can direct a computer or other programmable data processing apparatus to function in a particular manner, such that the instructions stored in the computer-readable memory produce an article of manufacture including instruction means which implement the function specified in the flowchart flow or flows and/or block diagram block or blocks.
These computer program instructions may also be loaded onto a computer or other programmable data processing apparatus to cause a series of operational steps to be performed on the computer or other programmable apparatus to produce a computer implemented process such that the instructions which execute on the computer or other programmable apparatus provide steps for implementing the functions specified in the flowchart flow or flows and/or block diagram block or blocks.
It will be apparent to those skilled in the art that various modifications and variations can be made to the embodiments of the present application without departing from the spirit and scope of the application. Thus, if such modifications and variations of the embodiments of the present application fall within the scope of the claims and the equivalents thereof, the present application is also intended to include such modifications and variations.
Claims (22)
1. A beam switching method applied to a network side device in a satellite communication network, wherein the satellite communication network is configured with a control beam, the method comprising the steps of:
determining whether a control beam of the terminal needs to be switched, and informing the terminal of first beam switching information if the control beam needs to be switched;
the notifying the terminal of the first beam switching information includes:
and notifying the index and/or the wave position index of the control wave beam to be switched to the terminal.
2. The method of claim 1, wherein determining whether the control beam of the terminal requires handover comprises:
and determining whether the control beam of the terminal needs to be switched according to one or more of the scanning pattern information of the control beam, the position of the terminal and the beam measurement result fed back by the terminal.
3. The method according to claim 2, wherein the method further comprises:
configuring beam measurement parameters of the terminal according to the scanning pattern information of the control beam;
and receiving a beam measurement result reported by the terminal, wherein the beam measurement result is obtained by the terminal based on the beam measurement parameters.
4. A method according to claim 2 or 3, wherein the scan pattern information of the control beam comprises one or more of:
The control beam service time of each wave position;
controlling the frequency of the beam;
the control beam index corresponding to each wave position,
a wave bit index for each wave bit.
5. The method of claim 1, wherein the determining whether the control beam of the terminal needs to be switched, and if the control beam needs to be switched, notifying the terminal of the first beam switching information, comprises:
determining whether the control beam of the terminal needs to be switched according to the switching scene of the terminal;
if the switching scene is inter-satellite switching or inter-cell switching, determining that the control beam of the terminal needs to be switched, and informing the terminal of the index of the control beam to be switched and/or the wave bit index of the control beam.
6. The method of claim 1, wherein determining whether the control beam of the terminal needs to be switched, and if the control beam needs to be switched, notifying the terminal of the first beam switching information, comprises:
determining whether a control beam and a data beam of a terminal need to be switched according to the position of the network side equipment or the terminal;
if the position of the network side equipment or the position of the terminal changes, determining that the control beam to be switched corresponding to the position of the terminal is switched and the data beam is not switched;
And notifying the terminal of information of the control beam to be switched, wherein the information comprises at least one of a control beam index and a wave position index of the control beam.
7. The method according to claim 1, wherein the method further comprises:
and determining whether the data beam needs to be switched, and informing the terminal of second beam switching information if the data beam needs to be switched.
8. The method of claim 7, wherein determining whether the data beam needs to be switched, and if the data beam needs to be switched, notifying the terminal of the second beam switching information, comprises:
determining whether the data beam of the terminal needs to be switched according to the position of the network side equipment or the terminal;
and if the position of the network side equipment or the terminal is changed, the data beam is adjusted, and the information of the adjusted data beam is notified to the terminal.
9. The method of claim 7, wherein determining whether the data beam needs to be switched, and if the data beam needs to be switched, notifying the terminal of the second beam switching information, comprises:
determining whether the data beam of the terminal needs to be switched across the satellite according to the position change of the network side equipment or the terminal or the signal measurement result of the adjacent satellite;
And if the position of the network side equipment or the terminal changes or the signal measurement result of the adjacent satellite triggers the cross-satellite switching, switching the data beam connected with the terminal so that the terminal is connected with the data beam under the adjacent satellite, and notifying the position information or ephemeris information or time-frequency compensation information of the adjacent satellite to the terminal.
10. The method of claim 7, wherein determining whether the data beam of the terminal needs to be switched, and if the data beam needs to be switched, notifying the terminal of the second beam switching information, comprises:
judging whether the data beam of the terminal needs to be switched according to whether the terminal transmits data in a preset time period;
and if the terminal does not transmit data in a preset time period, determining that the terminal releases the connection with the data beam, informing the terminal of the information of the control beam to be switched, and returning the terminal to the control beam.
11. The method of claim 1, wherein the network-side device comprises an on-board communication device, or an over-the-air communication platform.
12. A beam switching method applied to a terminal in a satellite communication network configured with a control beam, comprising:
Determining whether the control beam needs to be switched, and switching to a new control beam if the control beam needs to be switched;
the switching to a new control beam comprises:
and switching to a new control beam according to the index and/or the wave position index of the control beam to be switched, which are notified by the network side equipment.
13. The method of claim 12, wherein the determining whether the control beam needs to be switched, and if the control beam needs to be switched, notifying the terminal of beam switching information, comprises:
determining whether the control beam needs to be switched according to one or more of scanning pattern information of the control beam, the position of the network side equipment, the position of the terminal and a beam measurement result;
if the control beam needs to be switched, then switching to a new control beam.
14. The method of claim 13, wherein the method further comprises:
receiving beam measurement parameters, wherein the beam measurement parameters are configured by network side equipment according to scanning pattern information of control beams;
and measuring according to the beam measurement parameters to obtain a beam measurement result.
15. The method of claim 13 or 14, wherein the scan pattern information of the control beam comprises one or more of:
The control beam service time of each wave position;
a control beam index corresponding to each wave bit;
a wave bit index for each wave bit;
the frequency of the beam is controlled.
16. The method of claim 12, wherein determining whether the control beam needs to be switched, and if the control beam needs to be switched, switching to a new control beam comprises:
determining whether the control beam needs to be switched according to the switching scene of the terminal;
if the switching scene is the cross-star switching or the cross-cell switching, determining that the control beam needs to be switched;
and switching to a new control beam according to the control beam index and/or the wave position index to be switched, which are indicated by the network side equipment.
17. The method of claim 12, wherein the downlink control beam and the uplink control beam perform separate switching when the uplink control beam and the downlink control beam coverage areas of the control beams are not identical, or wherein the plurality of downlink beams or the plurality of uplink beams are aggregated and the plurality of beams are uniformly switched when the beams are switched.
18. A beam switching apparatus applied to a network-side device in a satellite communication network configured with a control beam, comprising:
The first processing module is used for determining whether the control beam of the terminal needs to be switched, and informing the terminal of the first beam switching information if the control beam needs to be switched;
the first processing module is further configured to notify the terminal of an index and/or a wave position index of a control beam to be switched.
19. A beam switching device for a terminal in a satellite communication network configured with a control beam based on beam scanning, comprising:
the third processing module is used for determining whether the control beam needs to be switched, and switching to a new control beam if the control beam needs to be switched;
the third processing module is further configured to switch to a new control beam according to the index of the control beam to be switched and/or the wave position index notified by the network side device.
20. A network side device, comprising: a first processor, a first transceiver and a first memory;
a first transceiver for receiving and transmitting data under the control of the first processor;
the first processor is configured to determine whether a control beam of the terminal needs to be switched, and notify the terminal of first beam switching information if the control beam needs to be switched;
The first processor is further configured to notify the terminal of an index and/or a wave position index of a control beam to be switched.
21. A terminal, comprising: a second processor, a second transceiver and a second memory;
a second transceiver for receiving and transmitting data under the control of a second processor;
the second processor is configured to determine whether the control beam needs to be switched, and switch to a new control beam if the control beam needs to be switched;
the second processor is further configured to switch to a new control beam according to the index of the control beam to be switched and/or the wave position index notified by the network side device.
22. A readable storage medium, characterized in that it has stored thereon a program which, when executed by a processor, realizes the steps comprising the method according to any of claims 1 to 17.
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Citations (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101022668A (en) * | 2007-03-16 | 2007-08-22 | 北京航空航天大学 | Planet-earth link switching method and planet-earth link switching mode selection processing device |
| CN108702180A (en) * | 2016-03-03 | 2018-10-23 | Idac控股公司 | Method and apparatus for the wave beam control in beamforming system |
| CN109257786A (en) * | 2018-11-30 | 2019-01-22 | 中国电子科技集团公司第五十四研究所 | A kind of GEO satellite mobile communication system multi-beam switching method that terminal is autonomous |
| CN109474326A (en) * | 2018-11-16 | 2019-03-15 | 清华大学 | Beam switching method and device |
| CN110677185A (en) * | 2018-07-03 | 2020-01-10 | 亚洲卫星有限公司 | High throughput satellite for relaying data between a low earth orbit satellite and an endpoint |
| CN111147120A (en) * | 2019-12-03 | 2020-05-12 | 南京中科晶上通信技术有限公司 | Method, device, terminal and storage medium for determining switching path between satellites |
| CN111211829A (en) * | 2019-12-31 | 2020-05-29 | 东方红卫星移动通信有限公司 | Method for lossless switching of data between low-orbit satellites |
| CN111510971A (en) * | 2020-04-09 | 2020-08-07 | 中电科航空电子有限公司 | Method and system for switching auxiliary control link of airborne low-orbit satellite communication terminal |
Family Cites Families (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN115459832B (en) * | 2018-07-31 | 2024-02-02 | St艾迪瑞科工程(欧洲)有限公司 | Satellite communication transmitter |
-
2020
- 2020-11-13 CN CN202011268245.4A patent/CN114339820B/en active Active
Patent Citations (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101022668A (en) * | 2007-03-16 | 2007-08-22 | 北京航空航天大学 | Planet-earth link switching method and planet-earth link switching mode selection processing device |
| CN108702180A (en) * | 2016-03-03 | 2018-10-23 | Idac控股公司 | Method and apparatus for the wave beam control in beamforming system |
| CN110677185A (en) * | 2018-07-03 | 2020-01-10 | 亚洲卫星有限公司 | High throughput satellite for relaying data between a low earth orbit satellite and an endpoint |
| CN109474326A (en) * | 2018-11-16 | 2019-03-15 | 清华大学 | Beam switching method and device |
| CN109257786A (en) * | 2018-11-30 | 2019-01-22 | 中国电子科技集团公司第五十四研究所 | A kind of GEO satellite mobile communication system multi-beam switching method that terminal is autonomous |
| CN111147120A (en) * | 2019-12-03 | 2020-05-12 | 南京中科晶上通信技术有限公司 | Method, device, terminal and storage medium for determining switching path between satellites |
| CN111211829A (en) * | 2019-12-31 | 2020-05-29 | 东方红卫星移动通信有限公司 | Method for lossless switching of data between low-orbit satellites |
| CN111510971A (en) * | 2020-04-09 | 2020-08-07 | 中电科航空电子有限公司 | Method and system for switching auxiliary control link of airborne low-orbit satellite communication terminal |
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