WO2019090724A1 - 用于无人机切换的方法、装置及基站 - Google Patents
用于无人机切换的方法、装置及基站 Download PDFInfo
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- WO2019090724A1 WO2019090724A1 PCT/CN2017/110538 CN2017110538W WO2019090724A1 WO 2019090724 A1 WO2019090724 A1 WO 2019090724A1 CN 2017110538 W CN2017110538 W CN 2017110538W WO 2019090724 A1 WO2019090724 A1 WO 2019090724A1
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- 238000000034 method Methods 0.000 title claims abstract description 53
- 238000005259 measurement Methods 0.000 claims abstract description 17
- 230000011664 signaling Effects 0.000 claims description 73
- 238000012544 monitoring process Methods 0.000 claims description 11
- 238000007726 management method Methods 0.000 description 15
- 238000010586 diagram Methods 0.000 description 10
- 230000001413 cellular effect Effects 0.000 description 5
- 238000012545 processing Methods 0.000 description 5
- 238000013459 approach Methods 0.000 description 2
- 238000005516 engineering process Methods 0.000 description 2
- 230000006978 adaptation Effects 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000004891 communication Methods 0.000 description 1
- 238000013500 data storage Methods 0.000 description 1
- 230000007613 environmental effect Effects 0.000 description 1
- 238000011835 investigation Methods 0.000 description 1
- 238000012423 maintenance Methods 0.000 description 1
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B64—AIRCRAFT; AVIATION; COSMONAUTICS
- B64F—GROUND OR AIRCRAFT-CARRIER-DECK INSTALLATIONS SPECIALLY ADAPTED FOR USE IN CONNECTION WITH AIRCRAFT; DESIGNING, MANUFACTURING, ASSEMBLING, CLEANING, MAINTAINING OR REPAIRING AIRCRAFT, NOT OTHERWISE PROVIDED FOR; HANDLING, TRANSPORTING, TESTING OR INSPECTING AIRCRAFT COMPONENTS, NOT OTHERWISE PROVIDED FOR
- B64F1/00—Ground or aircraft-carrier-deck installations
- B64F1/22—Ground or aircraft-carrier-deck installations for handling aircraft
-
- 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
-
- 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
- H04W36/0083—Determination of parameters used for hand-off, e.g. generation or modification of neighbour cell lists
- H04W36/00835—Determination of neighbour cell lists
- H04W36/008355—Determination of target cell based on user equipment [UE] properties, e.g. UE service capabilities
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B64—AIRCRAFT; AVIATION; COSMONAUTICS
- B64U—UNMANNED AERIAL VEHICLES [UAV]; EQUIPMENT THEREFOR
- B64U10/00—Type of UAV
- B64U10/10—Rotorcrafts
- B64U10/13—Flying platforms
-
- 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
- H04B7/18502—Airborne stations
- H04B7/18506—Communications with or from aircraft, i.e. aeronautical mobile service
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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
- H04W36/0083—Determination of parameters used for hand-off, e.g. generation or modification of neighbour cell lists
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W36/00—Hand-off or reselection arrangements
- H04W36/08—Reselecting an access point
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W36/00—Hand-off or reselection arrangements
- H04W36/24—Reselection being triggered by specific parameters
- H04W36/30—Reselection being triggered by specific parameters by measured or perceived connection quality data
- H04W36/302—Reselection being triggered by specific parameters by measured or perceived connection quality data due to low signal strength
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W36/00—Hand-off or reselection arrangements
- H04W36/24—Reselection being triggered by specific parameters
- H04W36/32—Reselection being triggered by specific parameters by location or mobility data, e.g. speed data
- H04W36/322—Reselection being triggered by specific parameters by location or mobility data, e.g. speed data by location data
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W92/00—Interfaces specially adapted for wireless communication networks
- H04W92/16—Interfaces between hierarchically similar devices
- H04W92/20—Interfaces between hierarchically similar devices between access points
Definitions
- the present disclosure relates to the field of wireless communication technologies, and in particular, to a method, an apparatus, and a base station for UAV handover.
- Unmanned Aerial Vehicle UAV
- UAV Unmanned Aerial Vehicle
- the 3rd Generation Partnership Project (3GPP) proposed in the discussion of the "Enhanced Support for UAVs" project to provide cellular networks for drones.
- the service that meets the demand is more standardized research, and it is believed that the cellular network determines the flight path of the drone in advance, which helps to improve the mobility of the drone, for example, can improve the success rate and rate of the handover.
- the related technology does not have a fast switching scheme for cellular network drones, so a new scheme is needed to realize rapid switching of drones.
- the embodiments of the present disclosure provide a method, a device, and a base station for a UAV handover, which are used to implement a base station based on a flight path of a UAV, determine a handover candidate base station, and switch The candidate base station performs a handover preparation operation in advance, thereby implementing fast handover to the handover candidate base station that satisfies the condition when the UAV needs to perform handover.
- a method for UAV switching applied to a source base station, the method comprising:
- the unmanned aerial vehicle is switched to the candidate base station that satisfies the handover condition.
- determining whether the base station that satisfies the handover condition has a candidate base station that has completed handover preparation includes:
- a base station that satisfies the handover condition is located in the handover candidate base station set, it is determined that the base station that satisfies the handover condition has a candidate base station that has completed handover preparation.
- the method further includes:
- the method further includes:
- the accessible base station is determined based on the flight path of the drone and the geographic location information of the base station.
- the method further includes:
- the geographical location information of the base station is exchanged with the neighboring base station based on the inter-base station interface; or
- the geographic location information of each neighboring base station is queried through the operator network management system.
- performing a handover preparation operation for the handover of the base station to be performed by the handover preparation operation, and determining, by the base station that the handover preparation is successful, the candidate base station that has completed the handover preparation includes:
- the source base station has an X2 interface connection with the base station that is to perform the handover preparation operation, sending, by using the X2 interface connection, the handover request signaling to the base station that is to perform the handover preparation operation;
- the base station that is to perform the handover preparation operation is determined as the candidate base station that has completed the handover preparation.
- performing a handover preparation operation for the handover of the base station to be performed by the handover preparation operation, and determining, by the base station that the handover preparation is successful, the candidate base station that has completed the handover preparation includes:
- the source base station does not have an X2 interface connection with the base station that is to perform the handover preparation operation, send, by using the S1 interface, the handover request signaling of the base station that is to be switched to the handover preparation operation to be sent to the mobility management entity;
- the base station determines the candidate base station that is ready for handover.
- the method further includes:
- selecting, based on the flight speed and/or flight altitude of the drone, the base station in the accessible base station to perform the handover preparation operation including:
- the method further includes:
- the handover request signaling is sent to one of the base stations that satisfy the handover condition.
- an apparatus for UAV switching applied to a source base station, the apparatus comprising:
- a first determining module configured to determine, when the base station that meets the handover condition is determined based on the measurement report sent by the UAV, whether the base station that satisfies the handover condition has a candidate base station that has completed handover preparation;
- a first switching module configured to: when the first determining module determines that the base station that satisfies the handover condition has a candidate base station that has completed handover preparation, switch the unmanned aerial vehicle to the candidate base station that satisfies a handover condition .
- the first determining module comprises:
- a comparison submodule configured to determine whether a base station in the base station that satisfies the handover condition is located in a handover candidate base station set, and the base station in the handover candidate base station set is a base station that has completed handover preparation;
- the first determining submodule is configured to determine, if the base station that satisfies the handover condition, that the base station is located in the handover candidate base station set, determine that the base station that satisfies the handover condition has a candidate base station that has completed handover preparation.
- the apparatus further includes:
- a base station selection module configured to select a base station to perform a handover preparation operation in the accessible base station based on a flight speed and/or a flight altitude of the drone, the accessible base station being the drone according to the Flight path a base station accessible during flight;
- the handover preparation module is configured to perform a handover preparation operation for handover to the base station to be subjected to the handover preparation operation, and determine the base station whose handover preparation is successful as the candidate base station that has completed the handover preparation.
- the apparatus further includes:
- the second determining module is configured to determine the accessible base station based on the flight path of the drone and the geographic location information of the base station.
- the apparatus further includes:
- the first acquiring module is configured to exchange geographic location information of the base station with the neighboring base station based on the inter-base station interface; or obtain the geographical location information of each neighboring base station from the core network device; or query by the operator network management system Geographical location information of each neighboring base station.
- the handover preparation module includes:
- a first sending submodule configured to send a handover request message to the base station to be performed by the X2 interface if the source base station has an X2 interface connection with the base station to be subjected to the handover preparation operation make;
- a first monitoring submodule configured to listen to response signaling of the base station to be subjected to the handover preparation operation
- a second determining submodule configured to: if the handover request acknowledgement signaling is monitored, determine that the handover preparation is successful, and determine the base station that is to perform the handover preparation operation as the candidate base station that has completed the handover preparation.
- the handover preparation module includes:
- a second sending sub-module configured to: if the source base station does not have an X2 interface connection with the base station that is to perform the handover preparation operation, send a handover to the to-be-executed handover preparation operation to the mobility management entity by using the S1 interface Handover of the base station requires signaling;
- a second monitoring submodule configured to listen to response signaling returned by the mobility management entity based on the handover requirement signaling
- a third determining submodule configured to: if the command switching signaling is monitored, determine that the handover preparation is successful, and determine the base station that is to perform the handover preparation operation as the candidate base station that has completed the handover preparation.
- the apparatus further includes:
- the third determining module is configured to determine that the handover preparation fails if the handover preparation failure signaling is monitored.
- the base station selection module includes:
- a first selection submodule configured to determine, according to a flight speed of the drone, a number of base stations to be subjected to a handover preparation operation, and select the first number of to-be-selected in the accessible base stations A base station performing a handover preparation operation as a base station to perform a handover preparation operation; or
- a second selection submodule configured to determine, according to a flying height of the drone, a number of base stations to be subjected to a handover preparation operation to be a second number, and selecting the second number of to-bes in the accessible base stations A base station performing a handover preparation operation as a base station to perform a handover preparation operation; or
- a third selection submodule configured to determine, according to a flight speed and a flight altitude of the drone, a number of base stations to be subjected to a handover preparation operation to be a third number, and selecting the third one among the accessible base stations The number of base stations to be subjected to the handover preparation operation is taken as the base station to be subjected to the handover preparation operation.
- the method further includes:
- the second switching module is configured to: when there is no candidate base station that has completed handover preparation in the base station that meets the handover condition, send handover request signaling to one of the base stations that satisfy the handover condition.
- a base station including:
- a memory for storing processor executable instructions
- processor is configured to:
- the unmanned aerial vehicle is switched to the candidate base station that satisfies the handover condition.
- a non-transitory computer readable storage medium having stored thereon computer instructions that, when executed by a processor, implement the following steps:
- the unmanned aerial vehicle is switched to the candidate base station that satisfies the handover condition.
- the source base station may determine whether there is a candidate base station that has completed the handover preparation in the base station that meets the handover condition, and if so, directly switch the UAV to the candidate that satisfies the handover condition.
- the base station that is, directly transmits the RRC connection reconfiguration signaling to the UAV, realizes the rapid handover of the UAV to the candidate base station that has completed the handover preparation, and helps the base station to improve the mobility of the UAV based on the flight path.
- FIG. 1A is a flow chart showing a method for UAV switching, according to an exemplary embodiment.
- FIG. 1B is a scene diagram of a method for UAV switching, according to an exemplary embodiment.
- FIG. 2 is a flow chart showing still another method for UAV switching, according to an exemplary embodiment.
- FIG. 3 is a flow chart showing another method for UAV switching, according to an exemplary embodiment.
- FIG. 4 is a flow chart showing still another method for UAV switching, according to an exemplary embodiment.
- FIG. 5 is a block diagram of an apparatus for drone switching, according to an exemplary embodiment.
- FIG. 6 is a block diagram of another apparatus for drone switching, according to an exemplary embodiment.
- FIG. 7 is a block diagram of another apparatus for drone switching, according to an exemplary embodiment.
- FIG. 8 is a block diagram of an apparatus suitable for use in drone switching, according to an exemplary embodiment.
- the drone is a cellular network drone that accesses the cellular network.
- FIG. 1A is a flowchart of a method for UAV switching according to an exemplary embodiment
- FIG. 1B is a scene diagram of a method for UAV switching according to an exemplary embodiment
- the method for UAV switching can be applied to a source base station, as shown in FIG. 1A, the method for UAV switching includes the following steps 101-102:
- step 101 when the base station that satisfies the handover condition is determined based on the measurement report transmitted by the drone, it is determined whether there is a candidate base station that has completed the handover preparation in the base station that satisfies the handover condition.
- the source base station when receiving the measurement report, may determine, according to the signal quality of each base station, a base station that satisfies the handover condition, and if the signal receiving power is greater than -65 dB, indicating that the base station is located at the location of the drone.
- the coverage strength level is very high and is a base station that satisfies the handover conditions.
- the candidate base station that has completed the handover preparation refers to the base station that has accepted the handover request initiated by the source base station, for example, if the source base station sends a handover request to the base station through the X2 interface connection, HANDOVER REQUEST signaling, and receiving the handover request acknowledgement HANDOVER REQUEST AKNOWLEDGE signaling of the base station, the base station may be determined as the candidate base station that has completed the handover preparation; or the source base station passes the S1 interface to the mobility management entity (Mobility Management Entity, referred to as The handover request HANDOVER REQUIRED signaling is sent for the MME, and the command handover HANDOVER COMMAND signaling returned by the MME is monitored, and the base station can be determined as the candidate base station that has completed the handover preparation.
- MME Mobility Management Entity
- the candidate base station may be recorded in a handover candidate base station set, and by determining whether the base station that satisfies the handover condition has a base station located in the handover candidate base station set, determine whether the base station that satisfies the handover condition has a candidate base station that has completed handover preparation. If a base station that satisfies the handover condition has a base station located in the handover candidate base station set, it is determined that the base station that satisfies the handover condition has a candidate base station that has completed handover preparation.
- the candidate base station has the base station 1, the base station 2, and the base station 3, and the base station 1 that satisfies the handover condition includes the base station 1, and the base station 1 that satisfies the handover condition is the candidate base station that has completed the handover preparation.
- step 102 when there is a candidate base station that has completed handover preparation among the base stations that satisfy the handover condition, the unmanned aerial vehicle is switched to the candidate base station that satisfies the handover condition.
- the radio resource control Radio Resource Control, RRC for short
- the RRCConnectionReconfiguration signaling is reconfigured to indicate that the drone is handed over to the candidate base station.
- a drone 10 in the scenario shown in FIG. 1B, a drone 10, a source base station 20, at least one candidate base station 30, and the like are included, wherein the source base station 20 acquires the drone 10 After the flight path, the geographic location information of each neighboring base station can be obtained, thereby determining the accessible base station when the drone 10 is flying according to the flight path, and then based on the flight information of the drone 10, such as flight speed and flight.
- the base station that determines the to-be-executed handover preparation operation initiates a handover request to each base station to be subjected to the handover preparation operation to perform a handover preparation operation, and determines the base station whose handover preparation is successful as the candidate base station 30 that has completed handover preparation.
- the measurement report is reported by the drone, if the base station that satisfies the handover condition determined by the measurement report has the base station that is the candidate base station 30 that has completed the handover preparation, the UAV can be directly instructed to quickly switch to the candidate base station that satisfies the handover condition. 30.
- the mobility performance of the drone 10 is improved.
- the source base station may determine, when receiving the measurement report sent by the UAV, whether the base station that satisfies the handover condition has a candidate base station that has completed handover preparation, and if so, may directly
- the UAV is switched to the candidate base station that satisfies the handover condition, that is, the RRC connection reconfiguration signaling is directly sent to the UAV, so that the UAV can be quickly switched to the candidate base station that has completed the handover preparation, which helps the base station to be based on This flight path enhances the mobility of the drone.
- FIG. 2 is a flowchart of still another method for UAV switching according to an exemplary embodiment.
- This embodiment uses the foregoing method provided by the embodiment of the present disclosure to determine how a source base station determines a candidate base station.
- An exemplary description, as shown in FIG. 2, includes the following steps:
- step 201 based on the flight path of the drone and the geographic location information of the base station, the accessible base station is determined.
- the base station may acquire a flight path of the drone from the core network device, and the flight path may be composed of a plurality of coordinate points or may also be indicated by a two-dimensional grid map.
- the base station may determine, according to the flight path of the UAV and the geographic location information of each base station, which of the neighboring base stations of the source base station is likely to serve.
- the UAV can access the base station, for example, the flight path of the UAV passes the location identified by the geographical location information of the base station, or determines the coverage of the UAV based on the geographic location information of the adjacent base station.
- a part, etc. can determine which neighboring base stations are accessible base stations of the drone, and the next accessible base station of the drone is not limited to one.
- the neighboring base station source base station can obtain the geographical location information of each base station in the following three manners.
- Manner 1 Based on the inter-base station interface, the geographical location information of the base station is exchanged with the neighboring base station.
- the source base station may interact with neighboring base stations to determine each other's geographic location information through an inter-base station interface, such as an X2 interface.
- an inter-base station interface such as an X2 interface.
- Manner 2 Obtain geographical location information of each neighboring base station from the core network device.
- the source base station may send a request for acquiring the geographic location information of each neighboring base station to the core network device by using the S1 interface, so as to obtain the geographic location information of each neighboring base station from the core network device.
- Manner 3 Query the geographic location information of each neighboring base station through the operator network management system.
- the source base station can query the geographic location information of each neighboring base station by using an operation, management, and maintenance (OAM) system of the operator.
- OAM operation, management, and maintenance
- step 202 based on the flight speed and/or flight altitude of the drone, the base station to be subjected to the handover preparation operation is selected among the accessible base stations, and the access base station is accessible when the drone is flying according to the flight path. Base station.
- the flight speed and/or flight altitude of the drone may be by the drone at the access source base station. Then report to the source base station.
- the source base station may select, according to the flight speed of the UAV, a base station in the accessible base station that selects a first number of handover preparation operations to be performed in the forward direction of the UAV to perform a handover preparation operation, first The specific value of the number is associated with the flight speed. For example, if the flight speed of the drone is faster, three base stations in the forward direction of the drone can be selected as the base station to be subjected to the handover preparation operation, if the flight of the drone Generally, the two base stations in the forward direction of the drone can be selected as the base station to be subjected to the handover preparation operation. If the flight speed of the drone is slow, one base station in the forward direction of the drone can be selected as the to-be-executed.
- the base station that is ready to operate, the correspondence between the flight speed and the number of base stations to be subjected to the handover preparation operation may be preset or may be calculated by the source base station.
- the source base station may select, according to the flight altitude of the drone, a second number of base stations in the advancing base station in the forward direction of the drone to perform a handover preparation operation, and second The specific value of the number is associated with the flying height. For example, if the flying height of the drone is low, one base station in the forward direction of the drone can be selected as the base station to be subjected to the switching preparation operation, if the flying height of the drone Generally, two base stations in the forward direction of the drone can be selected as the base station to be subjected to the handover preparation operation. If the flight altitude of the drone is high, two base stations in the forward direction of the drone can be selected as the to-be-executed.
- the base station that is ready to operate, the correspondence between the flight altitude and the number of base stations to be subjected to the handover preparation operation may be preset or may be calculated by the source base station.
- the source base station may select, according to the flight speed and the flight altitude of the drone, a base station in the accessible base station that selects a third number of handover preparation operations to be performed in the forward direction of the drone to perform a handover preparation operation.
- the specific number of the third number is associated with the flying height and the flying speed. For example, if the flying height of the drone is high but the flying speed is fast, two base stations in the forward direction of the drone can be selected as the to-be-executed switching.
- the base station to be operated if the flight height of the drone is general but the flight speed is very slow, one base station in the forward direction of the drone can be selected as the base station to be subjected to the handover preparation operation.
- the system may predetermined a criterion or algorithm to determine the number of base stations to perform the handover preparation operation based on the flight speed and/or flight altitude of the drone.
- step 203 a handover preparation operation for handover to the base station to be subjected to the handover preparation operation is performed, and the base station whose handover preparation is successful is determined as the candidate base station that has completed the handover preparation.
- the method for performing the handover preparation operation can be referred to the embodiment shown in FIG. 3 and FIG. 4, which will not be described in detail herein.
- step 204 when the base station that satisfies the handover condition is determined based on the measurement report sent by the drone, it is determined whether there is a candidate base station that has completed the handover preparation in the base station that satisfies the handover condition, and the base that satisfies the handover condition is satisfied.
- step 205 is executed.
- step 206 is performed.
- step 205 the drone is switched to the candidate base station that satisfies the handover condition.
- step 204 and step 205 can be referred to the description of step 101 and step 102 of the embodiment shown in FIG. 1A, and will not be described in detail herein.
- step 206 handover request signaling is sent to one of the base stations that satisfy the handover condition.
- the base station with the highest signal quality in the base station that satisfies the handover condition may send the handover request signaling, that is, at the source base station and When there is an X2 interface between the base stations with the highest signal quality, the handover request HANDOVER REQUEST signaling is sent to the one with the highest signal quality through the X2 interface connection; when there is no X2 interface connection between the source base station and the one with the highest signal quality The handover request HANDOVER REQUIRED signaling is sent to the MME through the S1 interface.
- three implementation manners for the source base station to acquire geographic location information of other base stations are disclosed, which helps the base station flexibly determine the accessible base station when the UAV is flying according to the flight path, and can be based on the flight speed of the drone. And/or the flight altitude determines the number of base stations to be subjected to the handover preparation operation, and helps the source base station determine which base station the drone may switch to based on the actual flight information of the drone and prepare for handover, thereby improving the unmanned Machine mobility.
- FIG. 3 is a flowchart of another method for UAV handover according to an exemplary embodiment.
- This embodiment uses the foregoing method provided by the embodiment of the present disclosure to how a source base station approaches an inter-base station interface.
- the base station performing the handover preparation operation performs the handover preparation as an example.
- the method includes the following steps:
- step 301 if the source base station has an X2 interface connection with the base station to be subjected to the handover preparation operation, the handover request signaling is sent to the base station to be subjected to the handover preparation operation through the X2 interface connection.
- step 302 the response signaling of the base station to be subjected to the handover preparation operation is monitored, and step 303 or step 304 is performed.
- step 303 if the handover request acknowledgement signaling is detected, it is determined that the handover preparation is successful, and the base station to be subjected to the handover preparation operation is determined as the candidate base station that has completed the handover preparation.
- step 304 if the handover preparation failure signaling is detected, it is determined that the handover preparation fails.
- the source base station may directly send a handover request HANDOVER REQUEST signaling to the base station to be performed by the X2 interface connection, and listen to the handover request returned by the base station based on the handover request.
- HANDOVER REQUEST AKNOWLEDGE signaling it is determined that the handover preparation is successful, and the base station that successfully prepares the handover can be determined as a candidate for the completed handover preparation.
- the base station is added to the handover candidate base station set. If the handover preparation failure HANDOVER PREPARATION FAILURE signaling is detected, it is determined that the handover preparation fails.
- a method for implementing handover preparation and determining a candidate base station when an inter-base station interface operation is performed between a source base station and a base station to be subjected to a handover preparation operation is disclosed.
- FIG. 4 is a flowchart of still another method for UAV handover according to an exemplary embodiment.
- This embodiment uses the foregoing method provided by the embodiment of the present disclosure to how a source base station approaches an inter-base station interface.
- the base station performing the handover preparation operation performs the handover preparation as an example.
- the method includes the following steps:
- step 401 if there is no X2 interface connection between the source base station and the base station to be subjected to the handover preparation operation, the handover request signaling of the base station to be switched to the handover preparation operation to be performed is sent to the mobility management entity through the S1 interface.
- step 402 the interception mobility management entity performs step 403 or step 404 based on the response signaling returned by the handover request signaling.
- step 403 if the command handover signaling is detected, it is determined that the handover preparation is successful, and the base station to be subjected to the handover preparation operation is determined as the candidate base station that has completed the handover preparation.
- step 404 if the handover preparation failure signaling is detected, it is determined that the handover preparation fails.
- step 401-step 404 the source base station sends a handover request HANDOVER REQUIRED signaling to the MME through the S1 interface, and the MME sends HANDOVER REQUEST signaling to the base station to perform the handover preparation operation, and the handover preparation operation is to be performed.
- the base station After the base station allocates all necessary bearer resources for the UAV based on the HANDOVER REQUEST signaling, the base station sends a handover request response HANDOVER REQUEST ACKNOWLEDGE signaling to the MME, and then the MME sends a command to switch the HANDOVER COMMAND signaling to the source base station, so that the source base station can
- the handover success is determined, and the base station that is successfully prepared for handover is determined as the candidate base station that has completed handover preparation, and is added to the handover candidate base station set. If the handover preparation failure HANDOVER PREPARATION FAILURE signaling is detected, it is determined that the handover preparation fails.
- a method for implementing handover preparation and determining a candidate base station when there is no inter-base station interface operation between the source base station and the base station to be performed for handover preparation operation is disclosed.
- FIG. 5 is a block diagram of an apparatus for UAV switching according to an exemplary embodiment.
- the apparatus is applied to a source base station.
- the apparatus for UAV switching includes:
- the first determining module 51 is configured to: when determining, according to the measurement report sent by the UAV, the base station that satisfies the handover condition, determine whether the base station that satisfies the handover condition has a candidate base station that has completed handover preparation;
- the first switching module 52 is configured to switch the drone to the candidate base station that satisfies the handover condition when the first determining module 51 determines that the candidate base station that has completed the handover preparation among the base stations that satisfy the handover condition.
- FIG. 6 is a block diagram of another apparatus for UAV switching according to an exemplary embodiment. As shown in FIG. 6, on the basis of the embodiment shown in FIG. 5, in an embodiment, A determining module 51 includes:
- the comparison sub-module 511 is configured to determine whether a base station that is in the handover condition satisfies a base station located in the handover candidate base station set, and the base station in the handover candidate base station set is a base station that has completed handover preparation;
- the first determining sub-module 512 is configured to determine, if the base station that satisfies the handover condition, that the base station is located in the handover candidate base station set, the candidate base station that has completed the handover preparation in the base station that meets the handover condition.
- the apparatus further includes:
- the base station selection module 53 is configured to select, according to the flight speed and/or the flight altitude of the drone, a base station in the accessible base station to perform the handover preparation operation, and the access base station can be the drone to fly according to the flight path.
- the handover preparation module 54 is configured to perform a handover preparation operation for handover to the base station to be subjected to the handover preparation operation, and determine the base station whose handover preparation is successful as the candidate base station that has completed the handover preparation.
- the apparatus further includes:
- the second determining module 55 is configured to determine the accessible base station based on the flight path of the drone and the geographic location information of the base station.
- the apparatus further includes:
- the first obtaining module 56 is configured to exchange geographical location information of the base station with the neighboring base station based on the inter-base station interface, or acquire geographic location information of each neighboring base station from the core network device; or, through the operator network management system Query the geographic location information of each neighboring base station.
- FIG. 7 is a block diagram of another apparatus for UAV switching, as shown in FIG. 7, on the basis of the embodiment shown in FIG. 5 and/or FIG. 6 above, in accordance with an exemplary embodiment.
- the handover preparation module 54 includes:
- the first sending sub-module 541 is configured to: if the source base station has an X2 interface connection with the base station to perform the handover preparation operation, send the handover request signaling to the base station to be performed by the X2 interface connection;
- the first monitoring submodule 542 is configured to listen to response signaling of the base station to perform the handover preparation operation
- the second determining submodule 543 is configured to determine that the handover preparation is successful if the handover request acknowledgement signaling is detected, and determine the base station to perform the handover preparation operation as the candidate base station that has completed the handover preparation.
- the handover preparation module 54 includes:
- the second sending submodule 544 is configured to: if the source base station does not have an X2 interface connection with the base station that is to perform the handover preparation operation, send a handover request to the mobile management entity to switch to the base station to be performed the handover preparation operation by using the S1 interface.
- the second monitoring sub-module 545 is configured to listen to the response signaling returned by the mobility management entity based on the handover requirement signaling;
- the third determining sub-module 546 is configured to determine that the handover preparation is successful if the command handover signaling is detected, and determine the base station to perform the handover preparation operation as the candidate base station that has completed the handover preparation.
- the apparatus further includes:
- the third determining module 57 is configured to determine that the handover preparation fails if the handover preparation failure signaling is monitored.
- the base station selection module 53 includes:
- the first selection sub-module 531 is configured to determine, according to the flight speed of the UAV, the number of base stations to be subjected to the handover preparation operation to be a first number, and select the first number of handover preparation operations to be performed in the accessible base stations
- the base station serves as a base station to perform handover preparation operations
- the second selection sub-module 532 is configured to determine, according to the flying height of the drone, that the number of base stations to be subjected to the handover preparation operation is a second number, and select a second number of to-be-executed handover preparation operations in the accessible base stations
- the base station serves as a base station to perform handover preparation operations
- the third selection sub-module 533 is configured to determine, according to the flight speed and the flight altitude of the drone, that the number of base stations to be subjected to the handover preparation operation is a third number, and select a third number of to-be-executed handovers among the accessible base stations The base station to be operated as the base station to be subjected to the handover preparation operation.
- the method further includes:
- the second switching module 58 is configured to: when there is no candidate base station that has completed handover preparation in the base station that satisfies the handover condition, send handover request signaling to one of the base stations that satisfy the handover condition.
- FIG. 8 is a block diagram of an apparatus suitable for use in drone switching, according to an exemplary embodiment.
- Apparatus 800 can be provided as a base station or a core network device.
- apparatus 800 includes a processing component 822, a wireless transmit/receive component 824, an antenna component 826, and a signal processing portion specific to the wireless interface.
- Processing component 822 can further include one or more processors.
- One of the processing components 822 can be configured to perform the method for drone switching described in the first aspect above.
- non-transitory computer readable storage medium comprising instructions executable by processing component 822 of apparatus 800 to perform the methods described above in the first or third aspect.
- the non-transitory computer readable storage medium can be a ROM, a random access memory (RAM), a CD-ROM, a magnetic tape, a floppy disk, and an optical data storage device.
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Abstract
本公开是关于一种用于无人机切换的方法、装置及基站。用于无人机切换的方法包括:在基于无人机发送的测量报告确定出满足切换条件的基站时,确定所述满足切换条件的基站中是否有已完成切换准备的候选基站;在所述满足切换条件的基站中有已完成切换准备的候选基站时,将所述无人机切换至满足切换条件的所述候选基站。本公开技术方可以实现基站基于无人机的飞行路径,确定出切换候选基站,并与切换候选基站提前进行切换准备操作,进而在无人机需要切换时实现到满足条件的切换候选基站的快速切换。
Description
本公开涉及无线通信技术领域,尤其涉及一种用于无人机切换的方法、装置及基站。
无人驾驶飞机(Unmanned Aerial Vehicle,简称为UAV)简称为“无人机”,已应用到某些特定的场景中,可以执行诸如高空摄像、无人探测侦察、测量测绘、公路勘测、城市规划、生态环保监控、科学考察、石油勘探、航空遥感、边防巡逻、森林防火、灾情评估等任务。
为了进一步拓展无人机的应用范围,第三代合作伙伴计划(3rd Generation Partnership Project,简称为3GPP)在对“无人机的增强支持”项目的讨论中提出了使蜂窝网络为无人机提供满足需求的服务更加标准化的研究,并且认为蜂窝网络提前确定出无人机的飞行路径,有助于提升无人机的移动性,例如可提升切换的成功率和速率。相关技术并没有针对蜂窝网络无人机的快速切换方案,因此需要提出一种新的方案,来实现无人机的快速切换。
发明内容
为克服相关技术中存在的问题,本公开实施例提供一种用于无人机切换的方法、装置及基站,用以实现基站基于无人机的飞行路径,确定出切换候选基站,并与切换候选基站提前进行切换准备操作,进而在无人机需要切换时实现到满足条件的切换候选基站的快速切换。
根据本公开实施例的第一方面,提供一种用于无人机切换的方法,应用在源基站上,所述方法包括:
在基于无人机发送的测量报告确定出满足切换条件的基站时,确定所述满足切换条件的基站中是否有已完成切换准备的候选基站;
在所述满足切换条件的基站中有已完成切换准备的候选基站时,将所述无人机切换至满足切换条件的所述候选基站。
在一实施例中,确定所述满足切换条件的基站中是否有已完成切换准备的候选基站,包括:
确定所述满足切换条件的基站中是否有基站位于切换候选基站集中,所述切换候选基站集中的基站为已完成切换准备的基站;
若所述满足切换条件的基站中有基站位于所述切换候选基站集中,则确定所述满足切换条件的基站中有已完成切换准备的候选基站。
在一实施例中,方法还包括:
基于无人机的飞行速度和/或飞行高度,在可接入基站中选择待执行切换准备操作的基站,所述可接入基站为所述无人机按照所述飞行路径飞行时可接入的基站;
执行向所述待执行切换准备操作的基站切换的切换准备操作,并将切换准备成功的基站确定为已完成切换准备的候选基站。
在一实施例中,方法还包括:
基于所述无人机的飞行路径和基站的地理位置信息,确定出可接入基站。
在一实施例中,方法还包括:
基于基站间接口,与相邻基站交互基站的地理位置信息;或者,
从核心网设备获取每一个相邻基站的地理位置信息;或者,
通过运营商网络管理***查询每一个相邻基站的地理位置信息。
在一实施例中,执行向所述待执行切换准备操作的基站切换的切换准备操作,并将切换准备成功的基站确定为已完成切换准备的候选基站,包括:
若所述源基站与所述待执行切换准备操作的基站之间具有X2接口连接,则通过X2接口连接向所述待执行切换准备操作的基站发送切换请求信令;
监听所述待执行切换准备操作的基站的响应信令;
若监听到切换请求确认信令,则确定切换准备成功,并将所述待执行切换准备操作的基站确定为已完成切换准备的候选基站。
在一实施例中,执行向所述待执行切换准备操作的基站切换的切换准备操作,并将切换准备成功的基站确定为已完成切换准备的候选基站,包括:
若所述源基站与所述待执行切换准备操作的基站之间不具有X2接口连接,则通过S1接口向移动管理实体发送切换至所述待执行切换准备操作的基站的切换要求信令;
监听所述移动管理实体基于所述切换要求信令返回的响应信令;
若监听到命令切换信令,则确定切换准备成功,并将所述待执行切换准备操作
的基站确定为已完成切换准备的候选基站。
在一实施例中,方法还包括:
若监听到切换准备失败信令,则确定切换准备失败。
在一实施例中,基于无人机的飞行速度和/或飞行高度,在可接入基站中选择待执行切换准备操作的基站,包括:
基于所述无人机的飞行速度,确定待执行切换准备操作的基站的数目为第一数目,在所述可接入基站中选择所述第一数目的待执行切换准备操作的基站作为待执行切换准备操作的基站;或者,
基于所述无人机的飞行高度,确定待执行切换准备操作的基站的数目为第二数目,在所述可接入基站中选择所述第二数目的待执行切换准备操作的基站作为待执行切换准备操作的基站;或者,
基于所述无人机的飞行速度和飞行高度,确定待执行切换准备操作的基站的数目为第三数目,在所述可接入基站中选择所述第三数目的待执行切换准备操作的基站作为待执行切换准备操作的基站。
在一实施例中,方法还包括:
在所述满足切换条件的基站中没有已完成切换准备的候选基站时,向所述满足切换条件的基站中的一个基站发送切换请求信令。
根据本公开实施例的第二方面,提供一种用于无人机切换的装置,应用在源基站上,所述装置包括:
第一确定模块,被配置为在基于无人机发送的测量报告确定出满足切换条件的基站时,确定所述满足切换条件的基站中是否有已完成切换准备的候选基站;
第一切换模块,被配置为在所述第一确定模块确定所述满足切换条件的基站中有已完成切换准备的候选基站时,将所述无人机切换至满足切换条件的所述候选基站。
在一实施例中,第一确定模块包括:
比较子模块,被配置为确定所述满足切换条件的基站中是否有基站位于切换候选基站集中,所述切换候选基站集中的基站为已完成切换准备的基站;
第一确定子模块,被配置为若所述满足切换条件的基站中有基站位于所述切换候选基站集中,则确定所述满足切换条件的基站中有已完成切换准备的候选基站。
在一实施例中,装置还包括:
基站选择模块,被配置为基于无人机的飞行速度和/或飞行高度,在可接入基站中选择待执行切换准备操作的基站,所述可接入基站为所述无人机按照所述飞行路
径飞行时可接入的基站;
切换准备模块,被配置为执行向所述待执行切换准备操作的基站切换的切换准备操作,并将切换准备成功的基站确定为已完成切换准备的候选基站。
在一实施例中,装置还包括:
第二确定模块,被配置为基于所述无人机的飞行路径和基站的地理位置信息,确定出可接入基站。
在一实施例中,装置还包括:
第一获取模块,被配置为基于基站间接口,与相邻基站交互基站的地理位置信息;或者,从核心网设备获取每一个相邻基站的地理位置信息;或者,通过运营商网络管理***查询每一个相邻基站的地理位置信息。
在一实施例中,切换准备模块包括:
第一发送子模块,被配置为若所述源基站与所述待执行切换准备操作的基站之间具有X2接口连接,则通过X2接口连接向所述待执行切换准备操作的基站发送切换请求信令;
第一监听子模块,被配置为监听所述待执行切换准备操作的基站的响应信令;
第二确定子模块,被配置为若监听到切换请求确认信令,则确定切换准备成功,并将所述待执行切换准备操作的基站确定为已完成切换准备的候选基站。
在一实施例中,切换准备模块包括:
第二发送子模块,被配置为若所述源基站与所述待执行切换准备操作的基站之间不具有X2接口连接,则通过S1接口向移动管理实体发送切换至所述待执行切换准备操作的基站的切换要求信令;
第二监听子模块,被配置为监听所述移动管理实体基于所述切换要求信令返回的响应信令;
第三确定子模块,被配置为若监听到命令切换信令,则确定切换准备成功,并将所述待执行切换准备操作的基站确定为已完成切换准备的候选基站。
在一实施例中,装置还包括:
第三确定模块,被配置为若监听到切换准备失败信令,则确定切换准备失败。
在一实施例中,基站选择模块包括:
第一选择子模块,被配置为基于所述无人机的飞行速度,确定待执行切换准备操作的基站的数目为第一数目,在所述可接入基站中选择所述第一数目的待执行切换准备操作的基站作为待执行切换准备操作的基站;或者,
第二选择子模块,被配置为基于所述无人机的飞行高度,确定待执行切换准备操作的基站的数目为第二数目,在所述可接入基站中选择所述第二数目的待执行切换准备操作的基站作为待执行切换准备操作的基站;或者,
第三选择子模块,被配置为基于所述无人机的飞行速度和飞行高度,确定待执行切换准备操作的基站的数目为第三数目,在所述可接入基站中选择所述第三数目的待执行切换准备操作的基站作为待执行切换准备操作的基站。
在一实施例中,还包括:
第二切换模块,被配置为在所述满足切换条件的基站中没有已完成切换准备的候选基站时,向所述满足切换条件的基站中的一个基站发送切换请求信令。
根据本公开实施例的第三方面,提供一种基站,包括:
处理器;
用于存储处理器可执行指令的存储器;
其中,所述处理器被配置为:
在基于无人机发送的测量报告确定出满足切换条件的基站时,确定所述满足切换条件的基站中是否有已完成切换准备的候选基站;
在所述满足切换条件的基站中有已完成切换准备的候选基站时,将所述无人机切换至满足切换条件的所述候选基站。
根据本公开实施例的第四方面,提供一种非临时计算机可读存储介质,所述存储介质上存储有计算机指令,所述指令被处理器执行时实现以下步骤:
在基于无人机发送的测量报告确定出满足切换条件的基站时,确定所述满足切换条件的基站中是否有已完成切换准备的候选基站;
在所述满足切换条件的基站中有已完成切换准备的候选基站时,将所述无人机切换至满足切换条件的所述候选基站。
本公开实施例提供的技术方案可以包括以下有益效果:
源基站可在接收到无人机发送的测量报告时,可确定满足切换条件的基站中是否有已经完成切换准备的候选基站,若有,则可直接将无人机切换至满足切换条件的候选基站,也即,直接向无人机发送RRC连接重配置信令,实现将无人机快速切换至已完成切换准备的候选基站,有助于基站基于该飞行路径提升无人机的移动性。
应当理解的是,以上的一般描述和后文的细节描述仅是示例性和解释性的,并不能限制本公开。
此处的附图被并入说明书中并构成本说明书的一部分,示出了符合本发明的实施例,并与说明书一起用于解释本发明的原理。
图1A是根据一示例性实施例示出的一种用于无人机切换的方法的流程图。
图1B是根据一示例性实施例示出的一种用于无人机切换的方法的场景图。
图2是根据一示例性实施例示出的又一种用于无人机切换的方法的流程图。
图3是根据一示例性实施例示出的另一种用于无人机切换的方法的流程图。
图4是根据一示例性实施例示出的又一种用于无人机切换的方法的流程图。
图5是根据一示例性实施例示出的一种用于无人机切换的装置的框图。
图6是根据一示例性实施例示出的另一种用于无人机切换的装置的框图。
图7是根据一示例性实施例示出的另一种用于无人机切换的装置的框图。
图8是根据一示例性实施例示出的一种适用于用于无人机切换的装置的框图。
这里将详细地对示例性实施例进行说明,其示例表示在附图中。下面的描述涉及附图时,除非另有表示,不同附图中的相同数字表示相同或相似的要素。以下示例性实施例中所描述的实施方式并不代表与本发明相一致的所有实施方式。相反,它们仅是与如所附权利要求书中所详述的、本发明的一些方面相一致的装置和方法的例子。
本公开中,无人机为接入蜂窝网络的蜂窝网络无人机。
图1A是根据一示例性实施例示出的一种用于无人机切换的方法的流程图,图1B是根据一示例性实施例示出的一种用于无人机切换的方法的场景图;该用于无人机切换的方法可以应用在源基站上,如图1A所示,该用于无人机切换的方法包括以下步骤101-102:
在步骤101中,在基于无人机发送的测量报告确定出满足切换条件的基站时,确定满足切换条件的基站中是否有已完成切换准备的候选基站。
在一实施例中,源基站在接收到测量报告时,可基于每一个基站的信号质量确定出满足切换条件的基站,如信号接收功率大于-65dB时,表明基站在此无人机所在位置的覆盖强度等级非常高,是一个满足切换条件的基站。
在一实施例中,已完成切换准备的候选基站是指已经接受源基站发起的切换请求的基站,例如,如果源基站通过X2接口连接向基站发送了切换请求HANDOVER
REQUEST信令,并且接收到了基站的切换请求确认HANDOVER REQUEST AKNOWLEDGE信令,则可将该基站确定为已经完成切换准备的候选基站;或者,源基站通过S1接口向移动管理实体(Mobility Management Entity,简称为MME)发送了切换要求HANDOVER REQUIRED信令,并且监听到了MME返回的命令切换HANDOVER COMMAND信令,则可将该基站确定为已经完成切换准备的候选基站。
在一实施例中,候选基站可以被记录在一个切换候选基站集中,通过确定满足切换条件的基站中是否有基站位于切换候选基站集中确定满足切换条件的基站中是否有已完成切换准备的候选基站,若满足切换条件的基站中有基站位于切换候选基站集中,则确定满足切换条件的基站中有已完成切换准备的候选基站。例如,候选基站集中有基站1、基站2、基站3,而满足切换条件的基站包括基站1,则说明满足切换条件的基站1是已完成切换准备的候选基站。
在步骤102中,在满足切换条件的基站中有已完成切换准备的候选基站时,将无人机切换至满足切换条件的候选基站。
在一实施例中,由于源基站已经向候选基站发送了切换请求,并且监听到了指示切换准备成功的信令,因此可直接向无人机发送无线资源控制(Radio Resource Control,简称为RRC)连接重配置RRCConnectionReconfiguration信令,指示无人机切换至候选基站即可。
在一示例性场景中,如图1B所示,在图1B所示的场景中,包括无人机10、源基站20、至少一个候选基站30等,其中,源基站20获取无人机10的飞行路径之后,可获取每一个相邻基站的地理位置信息,进而确定出无人机10按照飞行路径飞行时的可接入基站,然后再基于无人机10的飞行信息,如飞行速度和飞行高度,确定出待执行切换准备操作的基站,向每一个待执行切换准备操作的基站发起切换请求以执行切换准备操作,并将切换准备成功的基站确定为已完成切换准备的候选基站30,由此可在无人机上报测量报告时,若基于测量报告确定的满足切换条件的基站中有基站是已完成切换准备的候选基站30,可直接指示无人机快速切换到满足切换条件的候选基站30,提高了无人机10的移动性性能。
本实施例通过上述步骤101-步骤102,源基站可在接收到无人机发送的测量报告时,可确定满足切换条件的基站中是否有已经完成切换准备的候选基站,若有,则可直接将无人机切换至满足切换条件的候选基站,也即,直接向无人机发送RRC连接重配置信令,实现将无人机快速切换至已完成切换准备的候选基站,有助于基站基于该飞行路径提升无人机的移动性。
具体如何实现无人机切换的,请参考后续实施例。
下面以具体实施例来说明本公开实施例提供的技术方案。
图2是根据一示例性实施例示出的又一种用于无人机切换的方法的流程图;本实施例利用本公开实施例提供的上述方法,以源基站如何确定出候选基站为例进行示例性说明,如图2所示,包括如下步骤:
在步骤201中,基于无人机的飞行路径和基站的地理位置信息,确定出可接入基站。
在一实施例中,基站可以从核心网设备获取无人机的飞行路径,飞行路径可以由多个坐标点组成或者也可以由二维栅格地图指示。
在一实施例中,基站获取到无人机的飞行路径之后,可基于无人机的飞行路径和每一个基站的地理位置信息,确定出源基站的相邻基站中哪一个基站是可能会服务无人机的可接入基站,例如,无人机的飞行路径经过基站的地理位置信息所标识的位置,或者基于相邻基站的地理位置信息确定出其覆盖范围包括无人机的飞行路径的一部分,等等,即可确定出哪些相邻基站为无人机的可接入基站,无人机的下一个可接入基站并不限定为一个。
在一实施例中,相邻基站源基站可通过以下三种方式获取每一个基站的地理位置信息。
方式一:基于基站间接口,与相邻基站交互基站的地理位置信息。
在一实施例中,源基站可通过基站间接口,如X2接口,与相邻基站交互以确定彼此的地理位置信息。
方式二:从核心网设备获取每一个相邻基站的地理位置信息。
在一实施例中,源基站可通过S1接口,向核心网设备发送获取每一个相邻基站的地理位置信息的请求,进而实现从核心网设备获取每一个相邻基站的地理位置信息。
方式三:通过运营商网络管理***查询每一个相邻基站的地理位置信息。
在一实施例中,源基站可通过运营商的操作、管理、维护(Operation Administration and Maintenance,简称为OAM)***查询每一个相邻基站的地理位置信息。
在步骤202中,基于无人机的飞行速度和/或飞行高度,在可接入基站中选择待执行切换准备操作的基站,可接入基站为无人机按照飞行路径飞行时可接入的基站。
在一实施例中,无人机的飞行速度和/或飞行高度可以由无人机在接入源基站
后上报给源基站。
在一实施例中,源基站可基于无人机的飞行速度,在可接入基站中选择无人机前进方向上的第一数目的待执行切换准备操作的基站来进行切换准备操作,第一数目的具体数值与飞行速度相关联,例如,如果无人机的飞行速度较快,则可选择无人机前进方向上的三个基站作为待执行切换准备操作的基站,如果无人机的飞行速度一般,则可选择无人机前进方向上的两个基站作为待执行切换准备操作的基站,如果无人机的飞行速度较慢,则可选择无人机前进方向上的一个基站作为待执行切换准备操作的基站,飞行速度与待执行切换准备操作的基站的数目的对应关系可以预先设定,也可源基站计算得到。
在一实施例中,源基站可基于无人机的飞行高度,在可接入基站中选择无人机前进方向上的第二数目的待执行切换准备操作的基站来进行切换准备操作,第二数目的具体数值与飞行高度相关联,例如,如果无人机的飞行高度较低,则可选择无人机前进方向上的一个基站作为待执行切换准备操作的基站,如果无人机的飞行高度一般,则可选择无人机前进方向上的两个基站作为待执行切换准备操作的基站,如果无人机的飞行高度较高,则可选择无人机前进方向上的两个基站作为待执行切换准备操作的基站,飞行高度与待执行切换准备操作的基站的数目的对应关系可以预先设定,也可源基站计算得到。
在一实施例中,源基站可基于无人机的飞行速度和飞行高度,在可接入基站中选择无人机前进方向上的第三数目的待执行切换准备操作的基站来进行切换准备操作,第三数目的具体数值与飞行高度和飞行速度相关联,例如,如果无人机的飞行高度较高但是飞行速度很快,则可选择无人机前进方向上的两个基站作为待执行切换准备操作的基站,如果无人机的飞行高度一般但是飞行速度很慢,则可选择无人机前进方向上的一个基站作为待执行切换准备操作的基站。
在一实施例中,***可以预定一种准则或者算法来基于无人机的飞行速度和/或飞行高度确定待执行切换准备操作的基站的数目。
在步骤203中,执行向待执行切换准备操作的基站切换的切换准备操作,并将切换准备成功的基站确定为已完成切换准备的候选基站。
在一实施例中,执行切换准备操作的方法可参见图3和图4所示实施例,这里先不详述。
在步骤204中,在基于无人机发送的测量报告确定出满足切换条件的基站时,确定满足切换条件的基站中是否有已完成切换准备的候选基站,在满足切换条件的基
站中有已完成切换准备的候选基站时,执行步骤205,在满足切换条件的基站中没有已完成切换准备的候选基站时,执行步骤206。
在步骤205中,将无人机切换至满足切换条件的候选基站。
在一实施例中,步骤204和步骤205的描述可参见图1A所示实施例的步骤101和步骤102的描述,这里不再详述。
在步骤206中,向满足切换条件的基站中的一个基站发送切换请求信令。
在一实施例中,如果满足切换条件的基站中没有已完成切换准备的候选基站,则可想满足切换条件的基站中信号质量最高的一个基站发送切换请求信令,也即,在源基站和信号质量最高的一个基站之间有X2接口连接时,通过X2接口连接向信号质量最高的一个基站发送切换请求HANDOVER REQUEST信令;在源基站和信号质量最高的一个基站之间没有X2接口连接时,通过S1接口向MME发送切换要求HANDOVER REQUIRED信令。
本实施例中,公开了源基站获取其他基站的地理位置信息的三种实现方式,帮助基站灵活地确定无人机按照飞行路径飞行时的可接入基站,并且可基于无人机的飞行速度和/或飞行高度确定出待执行切换准备操作的基站的数目,有助于源基站基于无人机的实际飞行信息确定出无人机可能会切换至哪个基站并做出切换准备,提高无人机的移动性。
图3是根据一示例性实施例示出的另一种用于无人机切换的方法的流程图;本实施例利用本公开实施例提供的上述方法,以源基站如何向具有基站间接口的待执行切换准备操作的基站执行切换准备为例进行示例性说明,如图3所示,包括如下步骤:
在步骤301中,若源基站与待执行切换准备操作的基站之间具有X2接口连接,则通过X2接口连接向待执行切换准备操作的基站发送切换请求信令。
在步骤302中,监听待执行切换准备操作的基站的响应信令,执行步骤303或者步骤304。
在步骤303中,若监听到切换请求确认信令,则确定切换准备成功,并将待执行切换准备操作的基站确定为已完成切换准备的候选基站。
在步骤304中,若监听到切换准备失败信令,则确定切换准备失败。
在一实施例中,在步骤301-步骤304中,源基站可直接通过X2接口连接向待执行切换准备操作的基站发送切换请求HANDOVER REQUEST信令,并且在监听到了基站基于切换请求返回的切换请求确认HANDOVER REQUEST AKNOWLEDGE信令时,确定切换准备成功,可将该切换准备成功的基站确定为已完成切换准备的候选
基站,并添加至切换候选基站集中,若监听到切换准备失败HANDOVER PREPARATION FAILURE信令,则确定切换准备失败。
本实施例中,公开了在源基站与待执行切换准备操作的基站之间具有基站间接口操作时,实现切换准备进而确定候选基站的方式。
图4是根据一示例性实施例示出的又一种用于无人机切换的方法的流程图;本实施例利用本公开实施例提供的上述方法,以源基站如何向具有基站间接口的待执行切换准备操作的基站执行切换准备为例进行示例性说明,如图4所示,包括如下步骤:
在步骤401中,若源基站与待执行切换准备操作的基站之间不具有X2接口连接,则通过S1接口向移动管理实体发送切换至待执行切换准备操作的基站的切换要求信令。
在步骤402中,监听移动管理实体基于切换要求信令返回的响应信令,执行步骤403或者步骤404。
在步骤403中,若监听到命令切换信令,则确定切换准备成功,并将待执行切换准备操作的基站确定为已完成切换准备的候选基站。
在步骤404中,若监听到切换准备失败信令,则确定切换准备失败。
在一实施例中,在步骤401-步骤404中,源基站通过S1接口向MME发送切换要求HANDOVER REQUIRED信令,MME向待执行切换准备操作的基站发送HANDOVER REQUEST信令,待执行切换准备操作的基站在基于HANDOVER REQUEST信令为无人机分配好所有必须的承载资源后,向MME发送切换请求响应HANDOVER REQUEST ACKNOWLEDGE信令,然后MME向源基站发送命令切换HANDOVER COMMAND信令,由此源基站可确定切换成功,并将该切换准备成功的基站确定为已完成切换准备的候选基站,并添加至切换候选基站集中,若监听到切换准备失败HANDOVER PREPARATION FAILURE信令,则确定切换准备失败。
本实施例中,公开了在源基站与待执行切换准备操作的基站之间不具有基站间接口操作时,实现切换准备进而确定候选基站的方式。
图5是根据一示例性实施例示出的一种用于无人机切换的装置的框图,该装置应用在源基站上,如图5所示,用于无人机切换的装置包括:
第一确定模块51,被配置为在基于无人机发送的测量报告确定出满足切换条件的基站时,确定满足切换条件的基站中是否有已完成切换准备的候选基站;
第一切换模块52,被配置为在第一确定模块51确定满足切换条件的基站中有已完成切换准备的候选基站时,将无人机切换至满足切换条件的候选基站。
图6是根据一示例性实施例示出的另一种用于无人机切换的装置的框图,如图6所示,在上述图5所示实施例的基础上,在一实施例中,第一确定模块51包括:
比较子模块511,被配置为确定满足切换条件的基站中是否有基站位于切换候选基站集中,切换候选基站集中的基站为已完成切换准备的基站;
第一确定子模块512,被配置为若满足切换条件的基站中有基站位于切换候选基站集中,则确定满足切换条件的基站中有已完成切换准备的候选基站。
在一实施例中,装置还包括:
基站选择模块53,被配置为基于无人机的飞行速度和/或飞行高度,在可接入基站中选择待执行切换准备操作的基站,可接入基站为无人机按照飞行路径飞行时可接入的基站;
切换准备模块54,被配置为执行向待执行切换准备操作的基站切换的切换准备操作,并将切换准备成功的基站确定为已完成切换准备的候选基站。
在一实施例中,装置还包括:
第二确定模块55,被配置为基于无人机的飞行路径和基站的地理位置信息,确定出可接入基站。
在一实施例中,装置还包括:
第一获取模块56,被配置为基于基站间接口,与相邻基站交互基站的地理位置信息;或者,从核心网设备获取每一个相邻基站的地理位置信息;或者,通过运营商网络管理***查询每一个相邻基站的地理位置信息。
图7是根据一示例性实施例示出的另一种用于无人机切换的装置的框图,如图7所示,在上述图5和/或图6所示实施例的基础上,在一实施例中,切换准备模块54包括:
第一发送子模块541,被配置为若源基站与待执行切换准备操作的基站之间具有X2接口连接,则通过X2接口连接向待执行切换准备操作的基站发送切换请求信令;
第一监听子模块542,被配置为监听待执行切换准备操作的基站的响应信令;
第二确定子模块543,被配置为若监听到切换请求确认信令,则确定切换准备成功,并将待执行切换准备操作的基站确定为已完成切换准备的候选基站。
在一实施例中,切换准备模块54包括:
第二发送子模块544,被配置为若源基站与待执行切换准备操作的基站之间不具有X2接口连接,则通过S1接口向移动管理实体发送切换至待执行切换准备操作的基站的切换要求信令;
第二监听子模块545,被配置为监听移动管理实体基于切换要求信令返回的响应信令;
第三确定子模块546,被配置为若监听到命令切换信令,则确定切换准备成功,并将待执行切换准备操作的基站确定为已完成切换准备的候选基站。
在一实施例中,装置还包括:
第三确定模块57,被配置为若监听到切换准备失败信令,则确定切换准备失败。
在一实施例中,基站选择模块53包括:
第一选择子模块531,被配置为基于无人机的飞行速度,确定待执行切换准备操作的基站的数目为第一数目,在可接入基站中选择第一数目的待执行切换准备操作的基站作为待执行切换准备操作的基站;或者,
第二选择子模块532,被配置为基于无人机的飞行高度,确定待执行切换准备操作的基站的数目为第二数目,在可接入基站中选择第二数目的待执行切换准备操作的基站作为待执行切换准备操作的基站;或者,
第三选择子模块533,被配置为基于无人机的飞行速度和飞行高度,确定待执行切换准备操作的基站的数目为第三数目,在可接入基站中选择第三数目的待执行切换准备操作的基站作为待执行切换准备操作的基站。
在一实施例中,还包括:
第二切换模块58,被配置为在满足切换条件的基站中没有已完成切换准备的候选基站时,向满足切换条件的基站中的一个基站发送切换请求信令。
关于上述实施例中的装置,其中各个模块执行操作的具体方式已经在有关该方法的实施例中进行了详细描述,此处将不做详细阐述说明。
图8是根据一示例性实施例示出的一种适用于用于无人机切换的装置的框图。装置800可以被提供为一个基站或者一个核心网设备。参照图8,装置800包括处理组件822、无线发射/接收组件824、天线组件826、以及无线接口特有的信号处理部分,处理组件822可进一步包括一个或多个处理器。
处理组件822中的其中一个处理器可以被配置为执行上述第一方面所描述的用于无人机切换的方法。
在示例性实施例中,还提供了一种包括指令的非临时性计算机可读存储介质,上述指令可由装置800的处理组件822执行以完成上述第一方面或者第三方面所描述的方法。例如,非临时性计算机可读存储介质可以是ROM、随机存取存储器(RAM)、CD-ROM、磁带、软盘和光数据存储设备等。
本领域技术人员在考虑说明书及实践这里公开的公开后,将容易想到本公开的其它实施方案。本申请旨在涵盖本公开的任何变型、用途或者适应性变化,这些变型、用途或者适应性变化遵循本公开的一般性原理并包括本公开未公开的本技术领域中的公知常识或惯用技术手段。说明书和实施例仅被视为示例性的,本公开的真正范围和精神由下面的权利要求指出。
应当理解的是,本公开并不局限于上面已经描述并在附图中示出的精确结构,并且可以在不脱离其范围进行各种修改和改变。本公开的范围仅由所附的权利要求来限制。
Claims (22)
- 一种用于无人机切换的方法,其特征在于,应用在源基站上,所述方法包括:在基于无人机发送的测量报告确定出满足切换条件的基站时,确定所述满足切换条件的基站中是否有已完成切换准备的候选基站;在所述满足切换条件的基站中有已完成切换准备的候选基站时,将所述无人机切换至满足切换条件的所述候选基站。
- 根据权利要求1所述的方法,其特征在于,所述确定所述满足切换条件的基站中是否有已完成切换准备的候选基站,包括:确定所述满足切换条件的基站中是否有基站位于切换候选基站集中,所述切换候选基站集中的基站为已完成切换准备的基站;若所述满足切换条件的基站中有基站位于所述切换候选基站集中,则确定所述满足切换条件的基站中有已完成切换准备的候选基站。
- 根据权利要求1所述的方法,其特征在于,所述方法还包括:基于无人机的飞行速度和/或飞行高度,在可接入基站中选择待执行切换准备操作的基站,所述可接入基站为所述无人机按照所述飞行路径飞行时可接入的基站;执行向所述待执行切换准备操作的基站切换的切换准备操作,并将切换准备成功的基站确定为已完成切换准备的候选基站。
- 根据权利要求3所述的方法,其特征在于,所述方法还包括:基于所述无人机的飞行路径和基站的地理位置信息,确定出可接入基站。
- 根据权利要求4所述的方法,其特征在于,所述方法还包括:基于基站间接口,与相邻基站交互基站的地理位置信息;或者,从核心网设备获取每一个相邻基站的地理位置信息;或者,通过运营商网络管理***查询每一个相邻基站的地理位置信息。
- 根据权利要求3所述的方法,其特征在于,所述执行向所述待执行切换准备操作的基站切换的切换准备操作,并将切换准备成功的基站确定为已完成切换准备的候选基站,包括:若所述源基站与所述待执行切换准备操作的基站之间具有X2接口连接,则通过X2接口连接向所述待执行切换准备操作的基站发送切换请求信令;监听所述待执行切换准备操作的基站的响应信令;若监听到切换请求确认信令,则确定切换准备成功,并将所述待执行切换准备操作的基站确定为已完成切换准备的候选基站。
- 根据权利要求3所述的方法,其特征在于,所述执行向所述待执行切换准备操作的基站切换的切换准备操作,并将切换准备成功的基站确定为已完成切换准备的候选基站,包括:若所述源基站与所述待执行切换准备操作的基站之间不具有X2接口连接,则通过S1接口向移动管理实体发送切换至所述待执行切换准备操作的基站的切换要求信令;监听所述移动管理实体基于所述切换要求信令返回的响应信令;若监听到命令切换信令,则确定切换准备成功,并将所述待执行切换准备操作的基站确定为已完成切换准备的候选基站。
- 根据权利要求6或者7所述的方法,其特征在于,所述方法还包括:若监听到切换准备失败信令,则确定切换准备失败。
- 根据权利要求3所述的方法,其特征在于,所述基于无人机的飞行速度和/或飞行高度,在可接入基站中选择待执行切换准备操作的基站,包括:基于所述无人机的飞行速度,确定待执行切换准备操作的基站的数目为第一数目,在所述可接入基站中选择所述第一数目的待执行切换准备操作的基站作为待执行切换准备操作的基站;或者,基于所述无人机的飞行高度,确定待执行切换准备操作的基站的数目为第二数目,在所述可接入基站中选择所述第二数目的待执行切换准备操作的基站作为待执行切换准备操作的基站;或者,基于所述无人机的飞行速度和飞行高度,确定待执行切换准备操作的基站的数目为第三数目,在所述可接入基站中选择所述第三数目的待执行切换准备操作的基站作为待执行切换准备操作的基站。
- 根据权利要求1所述的方法,其特征在于,所述方法还包括:在所述满足切换条件的基站中没有已完成切换准备的候选基站时,向所述满足切换条件的基站中的一个基站发送切换请求信令。
- 一种用于无人机切换的装置,其特征在于,应用在源基站上,所述装置包括:第一确定模块,被配置为在基于无人机发送的测量报告确定出满足切换条件的基站时,确定所述满足切换条件的基站中是否有已完成切换准备的候选基站;第一切换模块,被配置为在所述第一确定模块确定所述满足切换条件的基站中有已完成切换准备的候选基站时,将所述无人机切换至满足切换条件的所述候选基站。
- 根据权利要求11所述的装置,其特征在于,所述第一确定模块包括:比较子模块,被配置为确定所述满足切换条件的基站中是否有基站位于切换候选基站集中,所述切换候选基站集中的基站为已完成切换准备的基站;第一确定子模块,被配置为若所述满足切换条件的基站中有基站位于所述切换候选基站集中,则确定所述满足切换条件的基站中有已完成切换准备的候选基站。
- 根据权利要求11所述的装置,其特征在于,所述装置还包括:基站选择模块,被配置为基于无人机的飞行速度和/或飞行高度,在可接入基站中选择待执行切换准备操作的基站,所述可接入基站为所述无人机按照所述飞行路径飞行时可接入的基站;切换准备模块,被配置为执行向所述待执行切换准备操作的基站切换的切换准备操作,并将切换准备成功的基站确定为已完成切换准备的候选基站。
- 根据权利要求13所述的装置,其特征在于,所述装置还包括:第二确定模块,被配置为基于所述无人机的飞行路径和基站的地理位置信息,确定出可接入基站。
- 根据权利要求14所述的装置,其特征在于,所述装置还包括:第一获取模块,被配置为基于基站间接口,与相邻基站交互基站的地理位置信息;或者,从核心网设备获取每一个相邻基站的地理位置信息;或者,通过运营商网络管理***查询每一个相邻基站的地理位置信息。
- 根据权利要求13所述的装置,其特征在于,所述切换准备模块包括:第一发送子模块,被配置为若所述源基站与所述待执行切换准备操作的基站之间具有X2接口连接,则通过X2接口连接向所述待执行切换准备操作的基站发送切换请求信令;第一监听子模块,被配置为监听所述待执行切换准备操作的基站的响应信令;第二确定子模块,被配置为若监听到切换请求确认信令,则确定切换准备成功,并将所述待执行切换准备操作的基站确定为已完成切换准备的候选基站。
- 根据权利要求13所述的装置,其特征在于,所述切换准备模块包括:第二发送子模块,被配置为若所述源基站与所述待执行切换准备操作的基站之间不具有X2接口连接,则通过S1接口向移动管理实体发送切换至所述待执行切换准备操作的基站的切换要求信令;第二监听子模块,被配置为监听所述移动管理实体基于所述切换要求信令返回的响应信令;第三确定子模块,被配置为若监听到命令切换信令,则确定切换准备成功,并将 所述待执行切换准备操作的基站确定为已完成切换准备的候选基站。
- 根据权利要求16或者17所述的装置,其特征在于,所述装置还包括:第三确定模块,被配置为若监听到切换准备失败信令,则确定切换准备失败。
- 根据权利要求13所述的装置,其特征在于,所述基站选择模块包括:第一选择子模块,被配置为基于所述无人机的飞行速度,确定待执行切换准备操作的基站的数目为第一数目,在所述可接入基站中选择所述第一数目的待执行切换准备操作的基站作为待执行切换准备操作的基站;或者,第二选择子模块,被配置为基于所述无人机的飞行高度,确定待执行切换准备操作的基站的数目为第二数目,在所述可接入基站中选择所述第二数目的待执行切换准备操作的基站作为待执行切换准备操作的基站;或者,第三选择子模块,被配置为基于所述无人机的飞行速度和飞行高度,确定待执行切换准备操作的基站的数目为第三数目,在所述可接入基站中选择所述第三数目的待执行切换准备操作的基站作为待执行切换准备操作的基站。
- 根据权利要求11所述的装置,其特征在于,所述装置还包括:第二切换模块,被配置为在所述满足切换条件的基站中没有已完成切换准备的候选基站时,向所述满足切换条件的基站中的一个基站发送切换请求信令。
- 一种基站,其特征在于,包括:处理器;用于存储处理器可执行指令的存储器;其中,所述处理器被配置为:在基于无人机发送的测量报告确定出满足切换条件的基站时,确定所述满足切换条件的基站中是否有已完成切换准备的候选基站;在所述满足切换条件的基站中有已完成切换准备的候选基站时,将所述无人机切换至满足切换条件的所述候选基站。
- 一种非临时计算机可读存储介质,所述存储介质上存储有计算机指令,其特征在于,所述指令被处理器执行时实现以下步骤:在基于无人机发送的测量报告确定出满足切换条件的基站时,确定所述满足切换条件的基站中是否有已完成切换准备的候选基站;在所述满足切换条件的基站中有已完成切换准备的候选基站时,将所述无人机切换至满足切换条件的所述候选基站。
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EP3709709B1 (en) | 2023-01-04 |
CN109451833B (zh) | 2021-04-02 |
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US20240040464A1 (en) | 2024-02-01 |
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