CN107466105B - Air and ground network joint calling system and device - Google Patents
Air and ground network joint calling system and device Download PDFInfo
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- CN107466105B CN107466105B CN201610393489.2A CN201610393489A CN107466105B CN 107466105 B CN107466105 B CN 107466105B CN 201610393489 A CN201610393489 A CN 201610393489A CN 107466105 B CN107466105 B CN 107466105B
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W72/00—Local resource management
- H04W72/04—Wireless resource allocation
- H04W72/044—Wireless resource allocation based on the type of the allocated resource
- H04W72/0453—Resources in frequency domain, e.g. a carrier in FDMA
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04B—TRANSMISSION
- H04B7/00—Radio transmission systems, i.e. using radiation field
- H04B7/14—Relay systems
- H04B7/15—Active relay systems
- H04B7/185—Space-based or airborne stations; Stations for satellite systems
- H04B7/18502—Airborne stations
- H04B7/18504—Aircraft used as relay or high altitude atmospheric platform
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04B—TRANSMISSION
- H04B7/00—Radio transmission systems, i.e. using radiation field
- H04B7/14—Relay systems
- H04B7/15—Active relay systems
- H04B7/185—Space-based or airborne stations; Stations for satellite systems
- H04B7/1853—Satellite systems for providing telephony service to a mobile station, i.e. mobile satellite service
- H04B7/18539—Arrangements for managing radio, resources, i.e. for establishing or releasing a connection
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W72/00—Local resource management
- H04W72/12—Wireless traffic scheduling
- H04W72/1215—Wireless traffic scheduling for collaboration of different radio technologies
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W72/00—Local resource management
- H04W72/12—Wireless traffic scheduling
- H04W72/1263—Mapping of traffic onto schedule, e.g. scheduled allocation or multiplexing of flows
- H04W72/1268—Mapping of traffic onto schedule, e.g. scheduled allocation or multiplexing of flows of uplink data flows
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Abstract
The embodiment of the invention provides an air and ground network combined calling system and a device, when a terminal accesses the air base station, the air base station in the system is switched from an idle state to an active state and sends an air activation message to a ground base station, and the ground base station receives the air activation message and sets a part of an uplink frequency spectrum of the ground base station, which is overlapped with the uplink frequency spectrum of the air base station, as a forbidden calling after receiving the air activation message. The downlink frequency spectrum of the aerial base station is different from the downlink frequency spectrum of the ground base station, the uplink frequency spectrum of the ground base station comprises the uplink frequency spectrum of the aerial base station, and the uplink frequency spectrum of the ground base station can be reused, so that the resource waste of the uplink frequency spectrum is reduced, and the interference between the aerial base station and the ground base station is avoided through flexible adjustment.
Description
Technical Field
The invention relates to a communication technology, in particular to an air and ground network combined calling system and device.
Background
In order to meet the operation requirements of airplanes, particularly helicopters, air-ground communication between the airplanes and the ground and air-air communication between the airplanes need to be realized.
In the prior art, an air network specially covering air services is generally established, and a ground network specially covering ground services is generally established, wherein the air network and the ground network are independent from each other.
However, the air network generally needs to be used after the aircraft takes off, and the ground network can be used after the aircraft lands, that is, the utilization rate of the air network is low.
Disclosure of Invention
The invention provides a system and a device for joint calling of air and ground networks, which are used for solving the problem that the air network in the prior art has large resource waste.
The first aspect of the present invention provides an air and ground network joint scheduling system, including: the system comprises an air base station and a ground base station, wherein the downlink frequency spectrum of the air base station is different from the downlink frequency spectrum of the ground base station, and the uplink frequency spectrum of the ground base station comprises the uplink frequency spectrum of the air base station;
the aerial base station is used for switching from an idle state to an active state when a terminal accesses the aerial base station, and forwarding the aerial activation message to the ground base station associated with the aerial base station;
and the ground base station is used for setting the part of the uplink frequency spectrum of the ground base station, which is overlapped with the uplink frequency spectrum of the air base station, as forbidden to be called after receiving the air activation message.
A second aspect of the present invention provides an over-the-air network base station, comprising:
the receiving module is used for receiving an access request sent by a terminal;
the switching module is used for switching the air base station from an idle state to an active state after the terminal is accessed;
a sending module, configured to send an air activation message to a ground base station associated with the air base station, so that the ground base station sets a part of an uplink spectrum that coincides with an uplink spectrum of the air base station as call prohibition, where a downlink spectrum of the air base station is different from a downlink spectrum of the ground base station, and the uplink spectrum of the ground base station includes the uplink spectrum of the air base station.
A third aspect of the present invention provides a ground network base station, including:
a receiving module, configured to receive an air activation message sent by an air base station, where the air activation message is used to instruct the air base station to switch to an active state;
and the calling module is used for setting the part of the uplink spectrum of the ground base station, which is overlapped with the uplink spectrum of the aerial base station, as forbidden to be called, wherein the downlink spectrum of the aerial base station is different from the downlink spectrum of the ground base station, and the uplink spectrum of the ground base station comprises the uplink spectrum of the aerial base station.
In the air and ground network joint call system and apparatus provided in this embodiment, when a terminal is accessed, the air base station switches from an idle state to an active state, and sends an air activation message to the ground base station, and the ground base station sets a part of an uplink spectrum of the ground base station, which coincides with an uplink spectrum of the air base station, as a call prohibition according to the air activation message, where a downlink spectrum of the air base station is different from a downlink spectrum of the ground base station, and the uplink spectrum of the ground base station includes the uplink spectrum of the air base station, so that the uplink spectrum of the ground base station can be reused to reduce resource waste of the uplink spectrum, and after the air base station enters the active state, the ground base station sets a part of the uplink spectrum of the ground base station, which coincides with the uplink spectrum of the air base station, as a call prohibition, so as to avoid interference with the air base station, the method is flexibly adjusted according to actual conditions so as to reduce resource waste and avoid mutual interference between the air and the ground.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings needed to be used in the description of the embodiments or the prior art will be briefly introduced below, and it is obvious that the drawings in the following description are some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to these drawings without creative efforts.
Fig. 1 is a schematic structural diagram of a first embodiment of an air and ground network joint call system provided in the present invention;
fig. 2 is a schematic flow chart of a first embodiment of a method for jointly invoking an air network and a ground network according to the present invention;
FIG. 3 is a schematic structural diagram of a first embodiment of an airborne base station provided in the present invention;
fig. 4 is a schematic structural diagram of a ground base station according to a first embodiment of the present invention.
Detailed Description
In the prior art, the air and ground dedicated networks are mainly used as narrowband networks, relatively speaking, the resources wasted by the air network are a little less, the bandwidth of a Long Term Evolution (LTE) network is wider, and if the LTE network is adopted and then the air dedicated network is continuously used, more resources are wasted. The embodiment of the invention aims to realize the FDD LTE network with air and ground cooperation under the Frequency Division Duplex (FDD) mode so as to reduce the waste of resources.
Fig. 1 is a schematic structural diagram of a first embodiment of an air and ground network joint call system provided by the present invention, as shown in fig. 1, the system includes: an air base station 01, a ground base station 02 and a control network element 03. The air base station 01, the ground base station 02 and the control network element 03 may be connected through network communication, for example, through an IP network communication, which is not limited herein.
Optionally, the system may further include: application servers, network management devices, etc.
It should be noted that the whole system may include at least one air base station 01 and at least one ground base station 02, which may be distributed in different geographical locations, and are not limited herein. The terminal mentioned in this embodiment may be an airborne terminal in an airplane, and is used for communicating with an air base station or a ground base station.
The controlling network element 03 may be a core network or other scheduling server, and is not limited herein. The control network element 03 is used for centralized scheduling of all air base stations 01 and ground base stations 02. The Network management device can perform unified parameter configuration and device management, and a core Network and an application Server provide Network access service (NAS for short) and application service in a unified manner.
The air base station has low requirement on the uplink frequency spectrum because the air service is less than the ground service and the airplane can be used for the air base station after taking off, so the uplink frequency spectrum of the air base station can be configured in the range of the ground base station, and the subsequent calling process can be dynamically adjusted according to the service condition. However, if the air base station and the ground base station are covered in the same geographical location, the co-frequency interference of the downlink spectrum is too large, and then the downlink spectrum of the ground base station and the air base station is deployed in a different frequency. Specifically, the downlink spectrum of the air base station is different from the downlink spectrum of the ground base station, and the uplink spectrum of the ground base station includes the uplink spectrum of the air base station.
It should be noted that the spectrum may specifically refer to a spectrum of a cell established by a base station.
Optionally, according to factors such as a geographic location and a coverage area, each air base station may establish an association relationship with at least one ground base station 02 in a preset range, and generally, a ground base station in a certain distance range, that is, a ground base station closer to the certain distance range may be selected to establish an association relationship. The ground base station and the air base station which establish the association relationship mutually avoid each other in the scheduling process so as to ensure better communication quality. Specifically, each air base station may be configured with an association relationship with a surrounding ground base station within a certain range by the network management device, that is, the network management device may establish an association relationship between the air base station and at least one ground base station 02 within a preset range.
Optionally, the network management device configures, for each ground base station, an adjacent aerial base station within a preset range as a pilot frequency neighboring cell, and configures, for an aerial base station, an adjacent ground base station as a pilot frequency neighboring cell.
And the air base station 01 is used for switching from an idle state to an active state when a terminal accesses the air base station and forwarding the air activation message to the ground base station associated with the air base station 01.
The air base station 01 may be first sent to the control network element through the S1 link, and then forwarded to the destination base station through the S1 link by the control network element. Alternatively, the airborne base station 01 may be sent directly to the destination base station via the X2 link.
Specifically, the initial state of the air base station 01 is an idle state, and when no terminal accesses the air base station 01, the air base station 01 is also in the idle state. The uplink spectrum of air base station 01 is disabled in idle state, and the ground base station can use this portion of the spectrum. When a terminal accesses the air base station 01, the air base station 01 is switched from an idle state to an active state. Specifically, after the terminal is successfully accessed, an air activation message is sent, and the air base station 01 sends the air activation message to the control network element 03, or the air base station 01 directly sends the activation message to the ground base station 02.
Alternatively, the terminal may be a direct access air base station, that is, the terminal sends an access request to the air base station, and the air base station completes the access after confirming. It is also possible that the terminal is handed over from the ground base station to the air base station, and if the terminal is handed over from the ground base station to the air base station, the ground base station sends a handover request to the air base station, and specifically, the handover request may be forwarded by the control network element 03, which is not limited herein.
And the control network element 03 is configured to forward the air activation message to the ground base station 02 associated with the air base station after receiving the air activation message, so as to notify the ground base station 02 that the air base station 01 enters an active state.
And a ground base station 02 configured to, after receiving the air activation message, set a portion of an uplink spectrum of the ground base station that overlaps with the uplink spectrum of the air base station as a call prohibition. That is, after knowing that air base station 01 enters the active state, ground base station 02 prohibits calling a portion overlapping with the uplink spectrum of the air base station in order to avoid interference.
Specifically, the ground base station 02 may also preset two states, when the air base station 01 is in an idle state, the ground base station 02 enters a normal state, that is, the ground base station may call all uplink frequency spectrums belonging to the ground base station, and optionally, the initial state of the ground base station 02 is set to be the normal state; when the air base station 02 enters the active state, the ground base station 02 switches to the air-ground combined state, that is, a part of the uplink spectrum of the ground base station, which overlaps with the uplink spectrum of the air base station, is set as call prohibition.
Taking FDD LTE network as an example, the current third Generation Partnership Project (3 GPP) protocol supports different uplink and downlink bandwidths of cells in FDD LTE network. Assume that the ground base station uses the entire FDD downlink spectrum's low (or high) frequency range, as well as the entire frequency range of the uplink spectrum; the airborne base station uses the entire FDD downlink spectrum in its high (or low) frequency range, as well as a portion of the entire frequency range of the uplink spectrum, where the downlink spectrum is in a different range than the uplink spectrum of the terrestrial base station. More specifically, taking the FDD spectrum resources of each 10 megahertz (Mhz) frequency range of the uplink as an example, the downlink spectrum of the ground base station uses a low-5 Mhz frequency range of the downlink 10Mhz, and the uplink uses the entire uplink 10Mhz frequency range to establish an uplink 5Mhz FDD cell and a downlink 10Mhz FDD cell; the downlink frequency spectrum of the air base station uses the frequency range of downlink 10Mhz with high usage of downlink 10Mhz, and the uplink uses the frequency range of 3Mhz in the whole uplink 10Mhz to establish the FDD cells of uplink 3Mhz and downlink 5 Mhz. Of course, this is not a limitation.
In a specific implementation process, since a cell generally preferentially allocates resources from a low frequency to a Physical Uplink Shared Channel (PUSCH) with a high frequency as a terminal, in order to avoid fragmentation of an Uplink spectrum of a ground base station when the air base station enters an active state and to reduce a probability of change to a terminal accessed by the ground base station, an Uplink frequency range of the air base station is arranged in a highest allocation portion of the Uplink spectrum of the ground base station, and an Uplink frequency range used by the air base station does not overlap with a Physical Uplink Control Channel (PUCCH) of the ground base station and a Physical Random Access Channel (PRACH), but is not limited thereto, and can be specifically considered according to an actual situation.
Optionally, in an idle state, the uplink spectrum Resource that can be called by the air base station only includes a Physical Resource Block (PRB) of a subframe where a PRACH is located by the air base station; and when the air base station is in an activated state, the PUSCH PRB of all the subframes can be called.
Correspondingly, the ground base station can call the PUSCH PRB under all subframes in a conventional state; and the ground base station sets PRBs occupied by the uplink spectrum of the air base station under all subframes as forbidden calls in the air-ground combined state.
Because the number of obstacles in the air is small, the radius of the air base station is large, and the radius of the ground base station is small, optionally, the PRACH of the air base station uses preamble (preamble) format 1 or 3, and occupies 2 subframes, wherein the preamble format 1 specifically means lasting 2ms, and the sequence length is 800 us; preamble format 3 specifically refers to duration 3ms, sequence length 1600 us. The PRACH of the ground base station uses a preamble format 0, and occupies 1 subframe, where the preamble format 0 specifically means duration of 1ms and sequence length of 800 us. Of course, the present invention is not limited thereto.
The PRACH channel period is not limited herein, for example, the PRACH channel period of the air base station may be 10ms or 20ms, and the PRACH channel period of the ground base station may be 10 ms.
In addition, because there are relatively few users of the air base station, a channel Sounding Reference Signal (SRS) may be sent in a preset period, where each period is only 1 subframe, and the subframe may be a subframe where a PRACH channel of the air base station is located, where the preset period is the same as the period of the PRACH channel, and may be 10ms or 20ms, which is not limited herein. The ground base station may transmit the SRS in a periodic non-frequency hopping manner or a non-periodic manner, and in a specific implementation, the spectrum occupied by the SRS channel of the ground base station needs to avoid the uplink spectrum occupied by the air base station.
In the system provided by this embodiment, when the air base station has a terminal, the air base station switches from the idle state to the active state and sends an air activation message to the ground base station, and the ground base station sets the part of the uplink spectrum of the ground base station, which coincides with the uplink spectrum of the air base station, as a forbidden call according to the air activation message, where the downlink spectrum of the air base station is different from the downlink spectrum of the ground base station, and the uplink spectrum of the ground base station includes the uplink spectrum of the air base station, so that the uplink spectrum of the ground base station can be reused, which reduces the resource waste of the uplink spectrum, and after the air base station enters the active state, the ground base station sets the part of the uplink spectrum of the ground base station, which coincides with the uplink spectrum of the air base station, as a forbidden call, which can avoid the interference with the air base station, i.e, so as to reduce resource waste and avoid the mutual interference between the air and the ground.
Further, the air base station 01 is further configured to switch from the active state to the idle state and send an air idle message to the control network element 03 when the number of terminals accessing the air base station 01 is 0 and no terminal accesses the air base station 01 within a preset time period. I.e. if the air base station remains in the active state for a period of time without terminal access, it will automatically switch to the idle state.
Correspondingly, after receiving the air idle message, the control network element 02 forwards the air idle message to the ground base station to notify the ground base station that the air base station enters an idle state. And the ground base station receives the air idle messages, and sets the part of the uplink spectrum of the ground base station, which is overlapped with the uplink spectrum of all the related air base stations, to be called after receiving the air idle messages sent by all the related air base stations. Namely, after the ground base station receives the air idle message, the uplink frequency spectrum originally distributed to the air base station can be called, so that the resource utilization rate is greatly improved
Referring to fig. 1, the system may further include a network management device 04 communicatively coupled to both the air base station and the ground base station, and specifically, may be communicatively coupled via an Internet Protocol (IP) network, which is not limited herein.
And the network management device 04 is configured to establish an association relationship between the air base station and at least one ground base station within a preset range of the air base station.
Referring to fig. 1, the system may include a plurality of air base stations and a plurality of ground base stations, and in order to better schedule spectrum resources of the air base stations and the ground base stations, the network management device 04 may previously associate each air base station with at least one ground base station within a preset range. Generally, the association relationship may be established with a ground base station located relatively close to the geographical position. The air base station and the ground base station in the above embodiment refer to the air base station and the ground base station having an association relationship, and optionally, the air base station and the ground base station having an association relationship may coordinate the frequency spectrum, that is, the ground base station avoids the uplink frequency spectrum of the air base station having an association relationship without considering other air base stations, so that more uplink frequency spectrum resources are available for the ground base station.
When an association relationship is established between one ground base station and a plurality of air base stations, in order to better avoid interference, the ground base station may set the part coinciding with the uplink frequency spectrums of the air base stations to be available after all the associated air base stations enter an idle state.
Further, the above-mentioned ground base station 02 is further configured to send a terminal transfer message to the control network element 03, where the terminal transfer message is used to instruct the terminal to switch to the air base station. Alternatively, the terminal may initiate a transfer by itself, and the terminal sends a transfer request message to the ground base station, and then the ground terminal sends a terminal transfer message to the air base station, but not limited thereto.
The control network element 03 receives the terminal transfer message and forwards the terminal transfer message to the air base station 01.
Correspondingly, after receiving the terminal transfer message, the air base station replies a transfer confirmation message to the control network element 03. And the terminal is successfully accessed to the air base station. If the air base station is in idle state before, then the air base station switches to active state after the terminal switches to the air base station successfully, and informs the ground base station according to the method of the foregoing embodiment.
Alternatively, the terminal may be handed over according to a change in geographic location, for example, the terminal may be handed over to the ground base station when on the ground and handed over to the air base station when arriving in the air after taking off. Sometimes, the signal-to-noise ratio of the ground base station is poor, the terminal temporarily requests to switch to the air base station, the terminal can acquire the signal-to-noise ratios of the ground base station and the air base station, and when the signal-to-noise ratio of the ground base station is better than that of the air base station, the terminal requests to switch to the ground base station.
Fig. 2 is a schematic flow chart of a first embodiment of a method for jointly invoking an air network and a ground network, where the foregoing system is configured to execute the method, and as shown in fig. 2, the method includes:
s201, when a terminal accesses the air base station, the air base station is switched from an idle state to an active state.
S202, the air base station sends an air activation message to the ground base station.
And S203, the ground base station receives the air activation message, and sets the part of the uplink spectrum of the ground base station, which is overlapped with the uplink spectrum of the air base station, as call prohibition after receiving the air activation message. The downlink frequency spectrum of the aerial base station is different from the downlink frequency spectrum of the ground base station, and the uplink frequency spectrum of the ground base station comprises the uplink frequency spectrum of the aerial base station.
In this embodiment, when the terminal is accessed, the air base station switches from the idle state to the active state, and transmits an air activation message to the ground base station, the ground base station sets the part of the uplink frequency spectrum of the ground base station which is overlapped with the uplink frequency spectrum of the air base station as call forbidding according to the air activation message, wherein the downlink frequency spectrum of the aerial base station is different from the downlink frequency spectrum of the ground base station, the uplink frequency spectrum of the ground base station comprises the uplink frequency spectrum of the aerial base station, therefore, the uplink frequency spectrum of the ground base station can be reused for the uplink frequency spectrum of the air base station, the resource waste of the uplink frequency spectrum is reduced, after the air base station enters an activated state, the ground base station sets the part of the uplink frequency spectrum of the ground base station, which is overlapped with the uplink frequency spectrum of the air base station, as a forbidden calling so as to avoid the interference with the air base station, the method is flexibly adjusted according to actual conditions so as to reduce resource waste and avoid mutual interference between the air and the ground.
Correspondingly to the foregoing embodiment, when the air base station is in the active state, the terminal having accessed the air base station may switch to another air base station or a ground base station, and if the number of terminals accessing the air base station is 0 and no terminal accesses the air base station within a preset time period, the air base station switches to the idle state, and sends an air idle message to the ground base station through the control network element. Therefore, after the ground base station receives the air idle message, the uplink frequency spectrum originally distributed to the air base station can be called, and the resource utilization rate is improved.
The implementation principle and technical effect of the embodiment of the method are the same as those of the embodiment of the system, and are not described herein again.
Fig. 3 is a schematic structural diagram of a first embodiment of an air base station provided in the present invention, and as shown in fig. 3, the air base station includes: a base station air interface module 301, a base station state management module 302, and an air-to-ground base station communication interface module 303, where:
and a base station air interface module 301, configured to schedule, send, and receive an air interface of a base station. Specifically, the base station air interface module 301 is configured to receive an access request and the like sent by a terminal.
A base station state management module 302, configured to switch an air base station from an idle state to an active state after the terminal accesses the air base station. The air base station original state is an idle state. If the airborne base station is already active, no further handover is necessary.
An air-to-ground base station communication interface module 303, configured to send an air activation message to a ground base station associated with the air base station, so that the ground base station sets a portion of an uplink spectrum that overlaps with an uplink spectrum of the air base station as a call prohibition, where a downlink spectrum of the air base station is different from a downlink spectrum of the ground base station, and the uplink spectrum of the ground base station includes the uplink spectrum of the air base station.
The implementation principle and technical effect of the air base station, that is, the air base station in the foregoing system, may refer to the foregoing system embodiment, and are not described herein again.
Optionally, the base station state management module 302 is further configured to switch the air base station from an active state to an idle state when the number of terminals accessing the air base station is 0 and no terminal accesses the air base station within a preset time period.
Fig. 4 is a schematic structural diagram of a first embodiment of a ground base station, as shown in fig. 4, the ground base station includes: an air-to-ground base station communication interface module 401, a base station state management module 402, and a base station air interface module 403, where:
the air-to-ground base station communication interface module 401 is configured to receive an air activation message sent by an air base station, where the air activation message is used to instruct the air base station to switch to an active state.
A base station status management module 402, configured to set a portion of an uplink spectrum of the ground base station that coincides with an uplink spectrum of the air base station as call prohibition, where a downlink spectrum of the air base station is different from a downlink spectrum of the ground base station, and the uplink spectrum of the ground base station includes the uplink spectrum of the air base station.
The base station air interface module 403 is configured to schedule, send, and receive an air interface of a base station, for example, receive an access request sent by a terminal.
Further, the air-to-ground base station communication interface module 401 is further configured to receive an air idle message sent by the air base station.
Correspondingly, the base station status management module 402 is further configured to set, to be available, a part of the uplink spectrum of the ground base station that is overlapped with the uplink spectrums of all associated air base stations after receiving the air idle messages sent by all associated air base stations.
The implementation principle and technical effect of the ground base station, that is, the ground base station in the foregoing system, may refer to the foregoing system embodiment, and are not described herein again.
In the embodiments provided in the present invention, it should be understood that the disclosed apparatus and method may be implemented in other ways. For example, the above-described apparatus embodiments are merely illustrative, and for example, the division of the units is only one logical division, and other divisions may be realized in practice, for example, a plurality of units or components may be combined or integrated into another system, or some features may be omitted, or not executed. In addition, the shown or discussed mutual coupling or direct coupling or communication connection may be an indirect coupling or communication connection through some interfaces, devices or units, and may be in an electrical, mechanical or other form.
The units described as separate parts may or may not be physically separate, and parts displayed as units may or may not be physical units, may be located in one place, or may be distributed on a plurality of network units. Some or all of the units can be selected according to actual needs to achieve the purpose of the solution of the embodiment.
In addition, functional units in the embodiments of the present invention may be integrated into one processing unit, or each unit may exist alone physically, or two or more units are integrated into one unit. The integrated unit can be realized in a form of hardware, or in a form of hardware plus a software functional unit.
The integrated unit implemented in the form of a software functional unit may be stored in a computer readable storage medium. The software functional unit is stored in a storage medium and includes several instructions to enable a computer device (which may be a personal computer, a server, or a network device) or a processor (processor) to execute some steps of the methods according to the embodiments of the present invention. And the aforementioned storage medium includes: a U disk, a removable hard disk, a Read-Only Memory (ROM), a Random Access Memory (RAM), a magnetic disk or an optical disk, and other various media capable of storing program codes.
Finally, it should be noted that: the above embodiments are only used to illustrate the technical solution of the present invention, and not to limit the same; while the invention has been described in detail and with reference to the foregoing embodiments, it will be understood by those skilled in the art that: the technical solutions described in the foregoing embodiments may still be modified, or some or all of the technical features may be equivalently replaced; and the modifications or the substitutions do not make the essence of the corresponding technical solutions depart from the scope of the technical solutions of the embodiments of the present invention.
Claims (8)
1. An air and ground network joint invocation system, characterized by comprising: the system comprises an air base station and a ground base station, wherein the downlink frequency spectrum of the air base station is different from the downlink frequency spectrum of the ground base station, and the uplink frequency spectrum of the ground base station comprises the uplink frequency spectrum of the air base station;
the aerial base station is used for switching from an idle state to an active state when a terminal accesses the aerial base station, and forwarding the aerial activation message to the ground base station associated with the aerial base station;
the ground base station is used for setting a part of an uplink frequency spectrum of the ground base station, which is overlapped with the uplink frequency spectrum of the air base station, as a forbidden call after receiving the air activation message;
an FDD LTE network for realizing air and ground cooperation under a frequency division duplex FDD mode;
the utilization rate of the ground network corresponding to the ground base station is higher than that of the air network corresponding to the air base station.
2. The system according to claim 1, wherein the air base station is further configured to switch from the active state to the idle state and forward an air idle message to the ground base station associated with the air base station when the number of terminals accessing the air base station is 0 and no terminal accesses the air base station within a preset time period;
the ground base station is further configured to receive the air idle message, and set a part of the uplink spectrum of the ground base station, which coincides with the uplink spectrum of all associated air base stations, to be callable after receiving the air idle message sent by all associated air base stations.
3. The system of claim 2, further comprising: the network management equipment is in communication connection with the air base station and the ground base station;
the network management equipment is used for establishing an association relationship between the aerial base station and at least one ground base station within a preset range of the aerial base station.
4. The system of claim 1, further comprising: a control network element;
the ground base station is further configured to send a terminal transfer message to the control network element, where the terminal transfer message is used to instruct a terminal to switch to the air base station;
the control network element is further configured to receive the terminal transfer message and forward the terminal transfer message to the air base station;
and the air base station is further configured to reply a transfer confirmation message to the control network element after receiving the terminal transfer message.
5. An over-the-air base station, comprising:
the receiving module is used for receiving an access request sent by a terminal;
the switching module is used for switching the air base station from an idle state to an active state after the terminal is accessed;
a sending module, configured to send an air activation message to a ground base station associated with the air base station, so that the ground base station sets a part of an uplink spectrum that coincides with an uplink spectrum of the air base station as a call prohibition, where a downlink spectrum of the air base station is different from a downlink spectrum of the ground base station, and the uplink spectrum of the ground base station includes the uplink spectrum of the air base station;
an FDD LTE network for realizing air and ground cooperation under a frequency division duplex FDD mode;
the utilization rate of the ground network corresponding to the ground base station is higher than that of the air network corresponding to the air base station.
6. The air base station of claim 5, wherein the switching module is further configured to switch the air base station from the active state to the idle state when the number of terminals accessing the air base station is 0 and no terminal accesses the air base station within a preset time period.
7. A ground base station, comprising:
a receiving module, configured to receive an air activation message sent by an air base station, where the air activation message is used to instruct the air base station to switch to an active state;
a calling module, configured to set a part of an uplink spectrum of the ground base station, which coincides with an uplink spectrum of the air base station, as a forbidden call, where a downlink spectrum of the air base station is different from a downlink spectrum of the ground base station, and the uplink spectrum of the ground base station includes the uplink spectrum of the air base station;
an FDD LTE network for realizing air and ground cooperation under a frequency division duplex FDD mode;
the utilization rate of the ground network corresponding to the ground base station is higher than that of the air network corresponding to the air base station.
8. The ground base station of claim 7, wherein the receiving module is further configured to receive an air idle message sent by the air base station;
the calling module is further configured to set, as callable, a portion of the uplink spectrum of the ground base station that coincides with the uplink spectrum of all associated air base stations after receiving the air idle messages sent by all associated air base stations.
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| CN107529184B (en) * | 2016-06-22 | 2021-04-30 | 成都鼎桥通信技术有限公司 | Signal transmission method and device |
| CN112997519B (en) * | 2018-12-18 | 2024-03-15 | 联想(北京)有限公司 | User equipment, base station and method for communication in non-terrestrial networks |
| CN113055895B (en) * | 2019-12-27 | 2023-01-31 | 成都鼎桥通信技术有限公司 | Spectrum resource sharing method and device |
| CN113556821B (en) * | 2020-08-17 | 2022-05-03 | 中兴通讯股份有限公司 | Scheduling method, base station, and storage medium |
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