CN112492274A - National secret encryption transmission equipment based on common network camera - Google Patents
National secret encryption transmission equipment based on common network camera Download PDFInfo
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- CN112492274A CN112492274A CN202011342299.0A CN202011342299A CN112492274A CN 112492274 A CN112492274 A CN 112492274A CN 202011342299 A CN202011342299 A CN 202011342299A CN 112492274 A CN112492274 A CN 112492274A
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- 230000005540 biological transmission Effects 0.000 title claims abstract description 76
- 230000004044 response Effects 0.000 claims abstract description 106
- 238000012544 monitoring process Methods 0.000 claims abstract description 49
- 238000000034 method Methods 0.000 claims abstract description 28
- 238000004891 communication Methods 0.000 claims description 19
- 230000009977 dual effect Effects 0.000 claims description 4
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- 238000012545 processing Methods 0.000 description 8
- 238000004590 computer program Methods 0.000 description 7
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
- H04N7/00—Television systems
- H04N7/18—Closed-circuit television [CCTV] systems, i.e. systems in which the video signal is not broadcast
- H04N7/181—Closed-circuit television [CCTV] systems, i.e. systems in which the video signal is not broadcast for receiving images from a plurality of remote sources
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04B—TRANSMISSION
- H04B17/00—Monitoring; Testing
- H04B17/30—Monitoring; Testing of propagation channels
- H04B17/309—Measuring or estimating channel quality parameters
- H04B17/318—Received signal strength
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04B—TRANSMISSION
- H04B17/00—Monitoring; Testing
- H04B17/30—Monitoring; Testing of propagation channels
- H04B17/382—Monitoring; Testing of propagation channels for resource allocation, admission control or handover
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
- H04N1/00—Scanning, transmission or reproduction of documents or the like, e.g. facsimile transmission; Details thereof
- H04N1/44—Secrecy systems
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W24/00—Supervisory, monitoring or testing arrangements
- H04W24/08—Testing, supervising or monitoring using real traffic
Abstract
The invention discloses a national secret encryption transmission method based on a common network camera, which comprises the following steps: collecting image data by a first network camera and carrying out national encryption on the image data; collecting image data by a second network camera and carrying out national encryption on the image data; in response to the image data being encrypted in the national secret, sending a scheduling request to the macro base station by the first network camera; in response to receiving the scheduling request, transmitting, by the macro base station, a first PDCCH message to the first network camera on a first symbol set of the first time slot; monitoring, by a first network camera, a first PDSCH message sent by a macro base station in response to receiving the first PDCCH message; in response to receiving a request for the image data encrypted with the secret, transmitting, by the first network camera, the image data encrypted with the secret to the macro base station; the first network camera listens for a signal quality of a reference signal transmitted by the macro base station.
Description
Technical Field
The invention relates to the technical field of national encryption, in particular to national encryption transmission equipment based on a common network camera.
Background
Under the complex environment of the internet of things, almost all equipment related to a large network can easily become an attack target, and malicious attack can intercept, snoop and damage videos in real time and other destructive behaviors by monitoring illegal access of the network to a monitoring probe.
Prior art CN106570687A discloses a circuit structure of a mobile payment chip, wherein the mobile payment chip includes: analog circuits and digital circuits; the analog circuit is connected with the digital circuit through a data line; the analog circuit comprises a communication analog circuit and a power supply and clock analog circuit; the digital circuit comprises an image processing chip, a camera interface, a processor, an interface circuit, a storage circuit, a safety processor, a protocol processing circuit and a bus, wherein the image processing chip, the camera interface, the main processor, the interface circuit, the storage circuit, the safety processor and the protocol processing circuit are respectively connected with the bus.
The information disclosed in this background section is only for enhancement of understanding of the general background of the invention and should not be taken as an acknowledgement or any form of suggestion that this information forms the prior art already known to a person skilled in the art.
Disclosure of Invention
The invention aims to provide a national secret encryption transmission device based on a common network camera, which can overcome the defects of the prior art.
In order to achieve the above object, the present invention provides a national secret encryption transmission method based on a common network camera, which is characterized in that the national secret encryption transmission method based on the common network camera comprises the following steps:
the method comprises the steps that a first network camera collects image data and carries out national encryption on the image data, wherein the first network camera is in communication connection with a macro base station;
collecting image data by a second network camera and carrying out national encryption on the image data, wherein the second network camera is in communication connection with the first small cell base station;
in response to the image data being encrypted in the national secret, sending a scheduling request to the macro base station by the first network camera;
in response to receiving the scheduling request, transmitting, by the macro base station, a first PDCCH message to the first network camera on a first set of symbols of the first time slot, wherein the first PDCCH message occupies a first set of subcarriers, wherein the first set of subcarriers is a subset of a system frequency band, wherein the first set of symbols includes a first OFDM symbol and a second OFDM symbol of the first time slot, wherein the first PDCCH message indicates a first PDSCH resource to the first network camera;
monitoring, by a first network camera, a first PDSCH message transmitted by a macro base station in response to receiving the first PDCCH message, wherein the first PDSCH message is transmitted on first PDSCH resources, wherein the first PDSCH resources occupy a first set of symbols of a first time slot in a time domain and occupy a second set of subcarriers in a frequency domain, wherein the second set of subcarriers is a subset of a system frequency band, wherein the first PDSCH message includes a request for image data encrypted in a country key transmitted by the macro base station;
in response to receiving a request for the image data encrypted with the secret, transmitting, by the first network camera, the image data encrypted with the secret to the macro base station;
monitoring, by a first network camera, a signal quality of a reference signal transmitted by a macro base station;
determining, by the first network camera, whether interference between the first network camera and the second network camera exceeds an interference threshold based on a signal quality of a reference signal transmitted by the macro base station;
and if the interference between the first network camera and the second network camera exceeds the interference threshold, the first network camera monitors the reference signal and the system information sent by the second small cell base station.
In a preferred implementation mode, the method for national encryption transmission based on the common network camera comprises the following steps:
in response to monitoring a reference signal and system information sent by a second small cell base station, establishing communication connection between a first network camera and the second small cell base station, wherein the first network camera is in double connection with the second small cell base station and a macro base station;
in response to the image data being encrypted in the country, sending, by the first network camera, a scheduling request to the second small cell base station;
in response to receiving the scheduling request, transmitting, by the second small cell base station, a second PDCCH message to the first network camera on a first set of symbols of a second time slot, wherein the second PDCCH message occupies a third set of subcarriers and a fourth set of subcarriers, wherein the third set of subcarriers and the fourth set of subcarriers are subsets of a system frequency band, wherein the third set of subcarriers and the fourth set of subcarriers are non-overlapping, wherein the first set of symbols includes a first OFDM symbol and a second OFDM symbol of the second time slot, wherein the second PDCCH message indicates a second PDSCH resource to the first network camera;
listening, by the first network camera, to a second PDSCH message transmitted by the second small cell base station in response to receiving the second PDCCH message, wherein the second PDSCH message is transmitted on a second PDSCH resource, wherein the second PDSCH resource occupies a first set of symbols of a second time slot in a time domain and occupies a fifth set of subcarriers and a sixth set of subcarriers in a frequency domain, wherein the fifth set of subcarriers and the sixth set of subcarriers are subsets of a system frequency band, wherein the fifth set of subcarriers and the sixth set of subcarriers do not overlap, wherein the second PDSCH message includes a request for the cipher-encrypted image data transmitted by the second small cell base station;
in response to receiving the request for the image data encrypted with the national security, the image data encrypted with the national security is transmitted by the first network camera to the second small cell base station.
In a preferred implementation mode, the method for national encryption transmission based on the common network camera comprises the following steps:
monitoring, by the second small cell base station, a signal strength of a reference signal transmitted by the macro base station on the first transmit beam;
in response to monitoring the signal strength of the reference signal sent by the macro base station on the first transmission beam, the second small cell base station judges whether the signal strength of the reference signal sent by the macro base station on the first transmission beam is greater than a signal strength threshold value;
and if the signal strength of the reference signal sent by the macro base station on the first transmission beam is judged to be larger than a signal strength threshold value, sending a third PDCCH message to the first network camera by the second small cell base station on a first symbol set of a third time slot, wherein the third PDCCH message occupies a third subcarrier set and a fourth subcarrier set, the third subcarrier set and the fourth subcarrier set are subsets of a system frequency band, the third subcarrier set and the fourth subcarrier set are not overlapped, the first symbol set comprises a first OFDM symbol and a second OFDM symbol of the third time slot, and the third PDCCH message indicates a beam index of the first transmission beam to the first network camera.
In a preferred implementation mode, the method for national encryption transmission based on the common network camera comprises the following steps:
in response to receiving the third PDCCH message, listening, by the first webcam, for a fourth PDCCH message transmitted by the macro base station, wherein the fourth PDCCH message is transmitted by the macro base station to the first webcam on a first set of symbols of a fourth slot, wherein the fourth PDCCH message occupies a first set of subcarriers, wherein the first set of subcarriers is a subset of a system frequency band, wherein the first set of symbols includes a first OFDM symbol and a second OFDM symbol of the fourth slot, wherein the fourth PDCCH message indicates a first PUSCH resource to the first webcam;
in response to receiving the fourth PDCCH message, sending, by the first network camera, a beam index of the first transmit beam to the macro base station;
sending, by the macro base station, a message to the first network camera using the second transmit beam in response to receiving the beam index of the first transmit beam;
monitoring, by the second small cell base station, a signal strength of a reference signal sent by the macro base station on the second transmit beam;
in response to monitoring the signal strength of the reference signal sent by the macro base station on the second transmission beam, the second small cell base station judges whether the signal strength of the reference signal sent by the macro base station on the second transmission beam is greater than a signal strength threshold value;
and if the signal strength of the reference signal sent by the macro base station on the second transmission beam is still larger than the signal strength threshold value, sending, by the second small cell base station, a fifth PDCCH message to the first network camera on a first symbol set of a fifth time slot, wherein the fifth PDCCH message occupies a third subcarrier set and a fourth subcarrier set, the third subcarrier set and the fourth subcarrier set are subsets of a system frequency band, the third subcarrier set and the fourth subcarrier set are not overlapped, the first symbol set comprises a first OFDM symbol and a second OFDM symbol of the fifth time slot, and the fifth PDCCH message indicates a beam index of the second transmission beam to the first network camera.
In a preferred implementation mode, the method for national encryption transmission based on the common network camera comprises the following steps:
monitoring, by the first webcam, a sixth PDCCH message sent by the macro base station in response to receiving the fifth PDCCH message, wherein the sixth PDCCH message is sent by the macro base station to the first webcam on a first set of symbols of a sixth slot, wherein the sixth PDCCH message occupies a first set of subcarriers, wherein the first set of subcarriers is a subset of a system frequency band, wherein the first set of symbols includes a first OFDM symbol and a second OFDM symbol of the sixth slot, wherein the sixth PDCCH message indicates a second PUSCH resource to the first webcam;
in response to receiving the sixth PDCCH message, sending, by the first network camera, a beam index of the second transmit beam to the macro base station;
in response to receiving the beam index of the second transmit beam, sending, by the macro base station, a message to the first network camera using a third transmit beam.
The invention provides a national secret encryption transmission device based on a common network camera, which is characterized by comprising the following components:
a unit for collecting image data by a first network camera and performing national encryption on the image data, wherein the first network camera is in communication connection with the macro base station;
a unit for collecting image data by a second network camera and performing national encryption on the image data, wherein the second network camera is in communication connection with the first small cell base station;
means for sending, by the first network camera, a scheduling request to the macro base station in response to the national security encryption of the image data;
means for transmitting, by a macro base station, a first PDCCH message to a first webcam on a first set of symbols of a first time slot in response to receiving a scheduling request, wherein the first PDCCH message occupies a first set of subcarriers, wherein the first set of subcarriers is a subset of a system frequency band, wherein the first set of symbols includes a first OFDM symbol and a second OFDM symbol of the first time slot, wherein the first PDCCH message indicates first PDSCH resources to the first webcam;
means for monitoring, by a first network camera, for a first PDSCH message transmitted by a macro base station in response to receiving a first PDCCH message, wherein the first PDSCH message is transmitted on a first PDSCH resource that occupies a first set of symbols of a first time slot in a time domain and occupies a second set of subcarriers in a frequency domain, wherein the second set of subcarriers is a subset of a system frequency band, wherein the first PDSCH message includes a request for cryptographically processed image data transmitted by the macro base station;
means for transmitting, by the first network camera, the cryptographically encrypted image data to the macro base station in response to receiving the request for the cryptographically encrypted image data;
means for monitoring, by a first network camera, signal quality of a reference signal transmitted by a macro base station;
means for determining, by the first network camera, whether interference between the first network camera and the second network camera exceeds an interference threshold based on a signal quality of a reference signal transmitted by the macro base station;
and means for monitoring, by the first network camera, the reference signal and the system information transmitted by the second small cell base station if it is determined that the interference between the first network camera and the second network camera exceeds an interference threshold.
In a preferred embodiment, the secret encryption transmission device based on the common network camera comprises:
means for establishing a communication connection with a second small cell base station by a first network camera in response to monitoring a reference signal and system information sent by the second small cell base station, wherein the first network camera is in dual connectivity with the second small cell base station and a macro base station;
means for sending, by the first network camera, a scheduling request to the second small cell base station in response to the cryptographic encryption of the image data;
means for transmitting, by the second small cell base station, a second PDCCH message to the first webcam on a first set of symbols of a second slot in response to receiving the scheduling request, wherein the second PDCCH message occupies a third set of subcarriers and a fourth set of subcarriers, wherein the third set of subcarriers and the fourth set of subcarriers are subsets of a system frequency band, wherein the third set of subcarriers and the fourth set of subcarriers do not overlap, wherein the first set of symbols includes a first OFDM symbol and a second OFDM symbol of the second slot, wherein the second PDCCH message indicates a second PDSCH resource to the first webcam;
means for listening, by the first network camera, to a second PDSCH message transmitted by the second small cell base station in response to receiving the second PDCCH message, wherein the second PDSCH message is transmitted on second PDSCH resources, wherein the second PDSCH resources occupy a first set of symbols of a second time slot in a time domain and occupy a fifth set of subcarriers and a sixth set of subcarriers in a frequency domain, wherein the fifth set of subcarriers and the sixth set of subcarriers are subsets of a system frequency band, wherein the fifth set of subcarriers and the sixth set of subcarriers do not overlap, wherein the second PDSCH message includes a request for cipher-ciphered image data transmitted by the second small cell base station;
means for transmitting, by the first network camera, the cryptographically encrypted image data to the second small cell base station in response to receiving the request for the cryptographically encrypted image data.
In a preferred embodiment, the secret encryption transmission device based on the common network camera comprises:
means for listening, by a second small cell base station, for signal strength of a reference signal transmitted by a macro base station on a first transmit beam;
means for determining, by the second small cell base station, whether the signal strength of the reference signal sent by the macro base station on the first transmit beam is greater than a signal strength threshold in response to monitoring the signal strength of the reference signal sent by the macro base station on the first transmit beam;
means for transmitting, by the second small cell base station, a third PDCCH message to the first webcam on a first set of symbols of a third time slot if it is determined that the signal strength of the reference signal transmitted by the macro base station on the first transmit beam is greater than a signal strength threshold, wherein the third PDCCH message occupies a third set of subcarriers and a fourth set of subcarriers, wherein the third set of subcarriers and the fourth set of subcarriers are subsets of a system frequency band, wherein the third set of subcarriers and the fourth set of subcarriers are non-overlapping, wherein the first set of symbols includes a first OFDM symbol and a second OFDM symbol of the third time slot, and wherein the third PDCCH message indicates a beam index of the first transmit beam to the first webcam.
In a preferred embodiment, the secret encryption transmission device based on the common network camera comprises:
means for listening, by the first webcam, to a fourth PDCCH message sent by the macro base station in response to receiving the third PDCCH message, wherein the fourth PDCCH message is sent by the macro base station to the first webcam on a first set of symbols of a fourth slot, wherein the fourth PDCCH message occupies a first set of subcarriers, wherein the first set of subcarriers is a subset of a system frequency band, wherein the first set of symbols includes a first OFDM symbol and a second OFDM symbol of the fourth slot, wherein the fourth PDCCH message indicates a first PUSCH resource to the first webcam;
means for transmitting, by the first network camera, a beam index of the first transmit beam to the macro base station in response to receiving the fourth PDCCH message;
means for transmitting, by the macro base station, a message to the first network camera using the second transmit beam in response to receiving the beam index of the first transmit beam;
means for listening, by the second small cell base station, for signal strength of a reference signal transmitted by the macro base station on a second transmit beam;
means for determining, by the second small cell base station, whether the signal strength of the reference signal sent by the macro base station on the second transmit beam is greater than a signal strength threshold in response to monitoring the signal strength of the reference signal sent by the macro base station on the second transmit beam;
means for transmitting, by the second small cell base station, a fifth PDCCH message to the first webcam on a first set of symbols of a fifth slot if it is determined that the signal strength of the reference signal transmitted by the macro base station on the second transmit beam is still greater than a signal strength threshold, wherein the fifth PDCCH message occupies a third set of subcarriers and a fourth set of subcarriers, wherein the third set of subcarriers and the fourth set of subcarriers are subsets of a system frequency band, wherein the third set of subcarriers and the fourth set of subcarriers are non-overlapping, wherein the first set of symbols includes a first OFDM symbol and a second OFDM symbol of the fifth slot, and wherein the fifth PDCCH message indicates a beam index of the second transmit beam to the first webcam.
In a preferred embodiment, the secret encryption transmission device based on the common network camera comprises:
means for monitoring, by the first webcamera, for a sixth PDCCH message sent by the macro base station in response to receiving the fifth PDCCH message, wherein the sixth PDCCH message is sent by the macro base station to the first webcamera on a first set of symbols of a sixth slot, wherein the sixth PDCCH message occupies a first set of subcarriers, wherein the first set of subcarriers is a subset of a system frequency band, wherein the first set of symbols includes a first OFDM symbol and a second OFDM symbol of the sixth slot, wherein the sixth PDCCH message indicates a second PUSCH resource to the first webcamera;
means for transmitting, by the first network camera, a beam index of the second transmit beam to the macro base station in response to receiving the sixth PDCCH message;
means for transmitting, by the macro base station, a message to the first network camera using the third transmit beam in response to receiving the beam index of the second transmit beam.
Compared with the prior art, the invention has the following advantages that after the network camera acquires the monitoring video of a high-security place, the information is directly transmitted to the base station and transmitted to the server by the base station. During information transmission, information security is realized by various codes provided by an operator, and an ideal security effect cannot be obtained by only depending on the encryption mode. The network camera comprises a national secret encryption chip, data are encrypted firstly, and then information after encryption is transmitted to a base station through wireless transmission, so that the aim of information security is fulfilled.
Drawings
Fig. 1 is a schematic diagram of a system architecture according to an embodiment of the present invention.
FIG. 2 is a flow diagram of a method according to an embodiment of the invention.
Fig. 3 is a block diagram of a system configuration of a cryptographic network camera according to an embodiment of the present invention.
Detailed Description
The following detailed description of the present invention is provided in conjunction with the accompanying drawings, but it should be understood that the scope of the present invention is not limited to the specific embodiments.
Throughout the specification and claims, unless explicitly stated otherwise, the word "comprise", or variations such as "comprises" or "comprising", will be understood to imply the inclusion of a stated element or component but not the exclusion of any other element or component.
Fig. 1 is a schematic diagram of a system architecture according to an embodiment of the present invention.
FIG. 2 is a flow diagram of a method according to an embodiment of the invention. As shown in the figure, the method of the present invention comprises the steps of:
step 101: the method comprises the steps that a first network camera collects image data and carries out national encryption on the image data, wherein the first network camera is in communication connection with a macro base station; the way of the network camera for carrying out national encryption on the image can be as follows: the network camera comprises a core module and an analog image sensor module for acquiring video images, wherein the analog image sensor module is converted into a digital signal through a digital image sensor and is connected with the core module; a national secret security module (the national secret security module can be a national secret security chip pushed by the same party for example) for encrypting software and hardware is integrated on the core module, the security module is connected with the core module through a USB/TCP/IP, the network camera is also provided with a break-proof trigger mechanism, and the SD built-in memory card is also an encrypted unordered data group; the 'common network camera based' in the application means that the main component of the camera with the encryption function can be a common camera, and the encryption of the network camera can be realized only by adding an encryption chip in the common camera and carrying out appropriate and known software design;
step 102: collecting image data by a second network camera and carrying out national encryption on the image data, wherein the second network camera is in communication connection with the first small cell base station;
step 103: in response to the image data being encrypted in the national secret, sending a scheduling request to the macro base station by the first network camera;
step 104: in response to receiving the scheduling request, transmitting, by the macro base station, a first PDCCH message to the first network camera on a first set of symbols of the first time slot, wherein the first PDCCH message occupies a first set of subcarriers, wherein the first set of subcarriers is a subset of a system frequency band, wherein the first set of symbols includes a first OFDM symbol and a second OFDM symbol of the first time slot, wherein the first PDCCH message indicates a first PDSCH resource to the first network camera;
step 105: monitoring, by a first network camera, a first PDSCH message transmitted by a macro base station in response to receiving the first PDCCH message, wherein the first PDSCH message is transmitted on first PDSCH resources, wherein the first PDSCH resources occupy a first set of symbols of a first time slot in a time domain and occupy a second set of subcarriers in a frequency domain, wherein the second set of subcarriers is a subset of a system frequency band, wherein the first PDSCH message includes a request for image data encrypted in a country key transmitted by the macro base station;
step 106: in response to receiving a request for the image data encrypted with the secret, transmitting, by the first network camera, the image data encrypted with the secret to the macro base station;
step 107: monitoring, by a first network camera, a signal quality of a reference signal transmitted by a macro base station;
step 108: determining, by the first network camera, whether interference between the first network camera and the second network camera exceeds an interference threshold based on a signal quality of a reference signal transmitted by the macro base station;
step 109: and if the interference between the first network camera and the second network camera exceeds the interference threshold, the first network camera monitors the reference signal and the system information sent by the second small cell base station.
In a preferred implementation mode, the method for national encryption transmission based on the common network camera comprises the following steps:
in response to monitoring a reference signal and system information sent by a second small cell base station, establishing communication connection between a first network camera and the second small cell base station, wherein the first network camera is in double connection with the second small cell base station and a macro base station;
in response to the image data being encrypted in the country, sending, by the first network camera, a scheduling request to the second small cell base station;
in response to receiving the scheduling request, transmitting, by the second small cell base station, a second PDCCH message to the first network camera on a first set of symbols of a second time slot, wherein the second PDCCH message occupies a third set of subcarriers and a fourth set of subcarriers, wherein the third set of subcarriers and the fourth set of subcarriers are subsets of a system frequency band, wherein the third set of subcarriers and the fourth set of subcarriers are non-overlapping, wherein the first set of symbols includes a first OFDM symbol and a second OFDM symbol of the second time slot, wherein the second PDCCH message indicates a second PDSCH resource to the first network camera;
listening, by the first network camera, to a second PDSCH message transmitted by the second small cell base station in response to receiving the second PDCCH message, wherein the second PDSCH message is transmitted on a second PDSCH resource, wherein the second PDSCH resource occupies a first set of symbols of a second time slot in a time domain and occupies a fifth set of subcarriers and a sixth set of subcarriers in a frequency domain, wherein the fifth set of subcarriers and the sixth set of subcarriers are subsets of a system frequency band, wherein the fifth set of subcarriers and the sixth set of subcarriers do not overlap, wherein the second PDSCH message includes a request for the cipher-encrypted image data transmitted by the second small cell base station;
in response to receiving the request for the image data encrypted with the national security, the image data encrypted with the national security is transmitted by the first network camera to the second small cell base station.
In a preferred implementation mode, the method for national encryption transmission based on the common network camera comprises the following steps:
monitoring, by the second small cell base station, a signal strength of a reference signal transmitted by the macro base station on the first transmit beam;
in response to monitoring the signal strength of the reference signal sent by the macro base station on the first transmission beam, the second small cell base station judges whether the signal strength of the reference signal sent by the macro base station on the first transmission beam is greater than a signal strength threshold value;
and if the signal strength of the reference signal sent by the macro base station on the first transmission beam is judged to be larger than a signal strength threshold value, sending a third PDCCH message to the first network camera by the second small cell base station on a first symbol set of a third time slot, wherein the third PDCCH message occupies a third subcarrier set and a fourth subcarrier set, the third subcarrier set and the fourth subcarrier set are subsets of a system frequency band, the third subcarrier set and the fourth subcarrier set are not overlapped, the first symbol set comprises a first OFDM symbol and a second OFDM symbol of the third time slot, and the third PDCCH message indicates a beam index of the first transmission beam to the first network camera.
In a preferred implementation mode, the method for national encryption transmission based on the common network camera comprises the following steps:
in response to receiving the third PDCCH message, listening, by the first webcam, for a fourth PDCCH message transmitted by the macro base station, wherein the fourth PDCCH message is transmitted by the macro base station to the first webcam on a first set of symbols of a fourth slot, wherein the fourth PDCCH message occupies a first set of subcarriers, wherein the first set of subcarriers is a subset of a system frequency band, wherein the first set of symbols includes a first OFDM symbol and a second OFDM symbol of the fourth slot, wherein the fourth PDCCH message indicates a first PUSCH resource to the first webcam;
in response to receiving the fourth PDCCH message, sending, by the first network camera, a beam index of the first transmit beam to the macro base station;
sending, by the macro base station, a message to the first network camera using the second transmit beam in response to receiving the beam index of the first transmit beam;
monitoring, by the second small cell base station, a signal strength of a reference signal sent by the macro base station on the second transmit beam;
in response to monitoring the signal strength of the reference signal sent by the macro base station on the second transmission beam, the second small cell base station judges whether the signal strength of the reference signal sent by the macro base station on the second transmission beam is greater than a signal strength threshold value;
and if the signal strength of the reference signal sent by the macro base station on the second transmission beam is still larger than the signal strength threshold value, sending, by the second small cell base station, a fifth PDCCH message to the first network camera on a first symbol set of a fifth time slot, wherein the fifth PDCCH message occupies a third subcarrier set and a fourth subcarrier set, the third subcarrier set and the fourth subcarrier set are subsets of a system frequency band, the third subcarrier set and the fourth subcarrier set are not overlapped, the first symbol set comprises a first OFDM symbol and a second OFDM symbol of the fifth time slot, and the fifth PDCCH message indicates a beam index of the second transmission beam to the first network camera.
In a preferred implementation mode, the method for national encryption transmission based on the common network camera comprises the following steps:
monitoring, by the first webcam, a sixth PDCCH message sent by the macro base station in response to receiving the fifth PDCCH message, wherein the sixth PDCCH message is sent by the macro base station to the first webcam on a first set of symbols of a sixth slot, wherein the sixth PDCCH message occupies a first set of subcarriers, wherein the first set of subcarriers is a subset of a system frequency band, wherein the first set of symbols includes a first OFDM symbol and a second OFDM symbol of the sixth slot, wherein the sixth PDCCH message indicates a second PUSCH resource to the first webcam;
in response to receiving the sixth PDCCH message, sending, by the first network camera, a beam index of the second transmit beam to the macro base station;
in response to receiving the beam index of the second transmit beam, sending, by the macro base station, a message to the first network camera using a third transmit beam.
The invention provides a national secret encryption transmission device based on a common network camera, which is characterized by comprising the following components:
a unit for collecting image data by a first network camera and performing national encryption on the image data, wherein the first network camera is in communication connection with the macro base station;
a unit for collecting image data by a second network camera and performing national encryption on the image data, wherein the second network camera is in communication connection with the first small cell base station;
means for sending, by the first network camera, a scheduling request to the macro base station in response to the national security encryption of the image data;
means for transmitting, by a macro base station, a first PDCCH message to a first webcam on a first set of symbols of a first time slot in response to receiving a scheduling request, wherein the first PDCCH message occupies a first set of subcarriers, wherein the first set of subcarriers is a subset of a system frequency band, wherein the first set of symbols includes a first OFDM symbol and a second OFDM symbol of the first time slot, wherein the first PDCCH message indicates first PDSCH resources to the first webcam;
means for monitoring, by a first network camera, for a first PDSCH message transmitted by a macro base station in response to receiving a first PDCCH message, wherein the first PDSCH message is transmitted on a first PDSCH resource that occupies a first set of symbols of a first time slot in a time domain and occupies a second set of subcarriers in a frequency domain, wherein the second set of subcarriers is a subset of a system frequency band, wherein the first PDSCH message includes a request for cryptographically processed image data transmitted by the macro base station;
means for transmitting, by the first network camera, the cryptographically encrypted image data to the macro base station in response to receiving the request for the cryptographically encrypted image data;
means for monitoring, by a first network camera, signal quality of a reference signal transmitted by a macro base station;
means for determining, by the first network camera, whether interference between the first network camera and the second network camera exceeds an interference threshold based on a signal quality of a reference signal transmitted by the macro base station;
and means for monitoring, by the first network camera, the reference signal and the system information transmitted by the second small cell base station if it is determined that the interference between the first network camera and the second network camera exceeds an interference threshold.
In a preferred embodiment, the secret encryption transmission device based on the common network camera comprises:
means for establishing a communication connection with a second small cell base station by a first network camera in response to monitoring a reference signal and system information sent by the second small cell base station, wherein the first network camera is in dual connectivity with the second small cell base station and a macro base station;
means for sending, by the first network camera, a scheduling request to the second small cell base station in response to the cryptographic encryption of the image data;
means for transmitting, by the second small cell base station, a second PDCCH message to the first webcam on a first set of symbols of a second slot in response to receiving the scheduling request, wherein the second PDCCH message occupies a third set of subcarriers and a fourth set of subcarriers, wherein the third set of subcarriers and the fourth set of subcarriers are subsets of a system frequency band, wherein the third set of subcarriers and the fourth set of subcarriers do not overlap, wherein the first set of symbols includes a first OFDM symbol and a second OFDM symbol of the second slot, wherein the second PDCCH message indicates a second PDSCH resource to the first webcam;
means for listening, by the first network camera, to a second PDSCH message transmitted by the second small cell base station in response to receiving the second PDCCH message, wherein the second PDSCH message is transmitted on second PDSCH resources, wherein the second PDSCH resources occupy a first set of symbols of a second time slot in a time domain and occupy a fifth set of subcarriers and a sixth set of subcarriers in a frequency domain, wherein the fifth set of subcarriers and the sixth set of subcarriers are subsets of a system frequency band, wherein the fifth set of subcarriers and the sixth set of subcarriers do not overlap, wherein the second PDSCH message includes a request for cipher-ciphered image data transmitted by the second small cell base station;
means for transmitting, by the first network camera, the cryptographically encrypted image data to the second small cell base station in response to receiving the request for the cryptographically encrypted image data.
In a preferred embodiment, the secret encryption transmission device based on the common network camera comprises:
means for listening, by a second small cell base station, for signal strength of a reference signal transmitted by a macro base station on a first transmit beam;
means for determining, by the second small cell base station, whether the signal strength of the reference signal sent by the macro base station on the first transmit beam is greater than a signal strength threshold in response to monitoring the signal strength of the reference signal sent by the macro base station on the first transmit beam; if the signal strength of the reference signal sent by the macro base station on the first transmission beam is greater than the signal strength threshold value, it indicates that the transmission power is too high when the macro base station uses the first transmission beam to send data to the first network camera, which will cause interference of the macro base station on the small cell base station;
means for transmitting, by the second small cell base station, a third PDCCH message to the first webcam on a first set of symbols of a third time slot if it is determined that the signal strength of the reference signal transmitted by the macro base station on the first transmit beam is greater than a signal strength threshold, wherein the third PDCCH message occupies a third set of subcarriers and a fourth set of subcarriers, wherein the third set of subcarriers and the fourth set of subcarriers are subsets of a system frequency band, wherein the third set of subcarriers and the fourth set of subcarriers are non-overlapping, wherein the first set of symbols includes a first OFDM symbol and a second OFDM symbol of the third time slot, and wherein the third PDCCH message indicates a beam index of the first transmit beam to the first webcam.
In a preferred embodiment, the secret encryption transmission device based on the common network camera comprises:
means for listening, by the first webcam, to a fourth PDCCH message sent by the macro base station in response to receiving the third PDCCH message, wherein the fourth PDCCH message is sent by the macro base station to the first webcam on a first set of symbols of a fourth slot, wherein the fourth PDCCH message occupies a first set of subcarriers, wherein the first set of subcarriers is a subset of a system frequency band, wherein the first set of symbols includes a first OFDM symbol and a second OFDM symbol of the fourth slot, wherein the fourth PDCCH message indicates a first PUSCH resource to the first webcam;
means for transmitting, by the first network camera, a beam index of the first transmit beam to the macro base station in response to receiving the fourth PDCCH message;
means for transmitting, by the macro base station, a message to the first network camera using the second transmit beam in response to receiving the beam index of the first transmit beam;
means for listening, by the second small cell base station, for signal strength of a reference signal transmitted by the macro base station on a second transmit beam;
means for determining, by the second small cell base station, whether the signal strength of the reference signal sent by the macro base station on the second transmit beam is greater than a signal strength threshold in response to monitoring the signal strength of the reference signal sent by the macro base station on the second transmit beam;
means for transmitting, by the second small cell base station, a fifth PDCCH message to the first webcam on a first set of symbols of a fifth slot if it is determined that the signal strength of the reference signal transmitted by the macro base station on the second transmit beam is still greater than a signal strength threshold, wherein the fifth PDCCH message occupies a third set of subcarriers and a fourth set of subcarriers, wherein the third set of subcarriers and the fourth set of subcarriers are subsets of a system frequency band, wherein the third set of subcarriers and the fourth set of subcarriers are non-overlapping, wherein the first set of symbols includes a first OFDM symbol and a second OFDM symbol of the fifth slot, and wherein the fifth PDCCH message indicates a beam index of the second transmit beam to the first webcam.
In a preferred embodiment, the secret encryption transmission device based on the common network camera comprises:
means for monitoring, by the first webcamera, for a sixth PDCCH message sent by the macro base station in response to receiving the fifth PDCCH message, wherein the sixth PDCCH message is sent by the macro base station to the first webcamera on a first set of symbols of a sixth slot, wherein the sixth PDCCH message occupies a first set of subcarriers, wherein the first set of subcarriers is a subset of a system frequency band, wherein the first set of symbols includes a first OFDM symbol and a second OFDM symbol of the sixth slot, wherein the sixth PDCCH message indicates a second PUSCH resource to the first webcamera;
means for transmitting, by the first network camera, a beam index of the second transmit beam to the macro base station in response to receiving the sixth PDCCH message;
means for transmitting, by the macro base station, a message to the first network camera using the third transmit beam in response to receiving the beam index of the second transmit beam.
As will be appreciated by one skilled in the art, embodiments of the present application may be provided as a method, system, or computer program product. Accordingly, the present application may take the form of an entirely hardware embodiment, an entirely software embodiment or an embodiment combining software and hardware aspects. Furthermore, the present application may take the form of a computer program product embodied on one or more computer-usable storage media (including, but not limited to, disk storage, CD-ROM, optical storage, and the like) having computer-usable program code embodied therein.
The present application is described with reference to flowchart illustrations and/or block diagrams of methods, apparatus (systems), and computer program products according to embodiments of the application. It will be understood that each flow and/or block of the flow diagrams and/or block diagrams, and combinations of flows and/or blocks in the flow diagrams and/or block diagrams, can be implemented by computer program instructions. These computer program instructions may be provided to a processor of a general purpose computer, special purpose computer, embedded processor, or other programmable data processing apparatus to produce a machine, such that the instructions, which execute via the processor of the computer or other programmable data processing apparatus, create means for implementing the functions specified in the flowchart flow or flows and/or block diagram block or blocks.
These computer program instructions may also be stored in a computer-readable memory that can direct a computer or other programmable data processing apparatus to function in a particular manner, such that the instructions stored in the computer-readable memory produce an article of manufacture including instruction means which implement the function specified in the flowchart flow or flows and/or block diagram block or blocks.
These computer program instructions may also be loaded onto a computer or other programmable data processing apparatus to cause a series of operational steps to be performed on the computer or other programmable apparatus to produce a computer implemented process such that the instructions which execute on the computer or other programmable apparatus provide steps for implementing the functions specified in the flowchart flow or flows and/or block diagram block or blocks.
The foregoing descriptions of specific exemplary embodiments of the present invention have been presented for purposes of illustration and description. It is not intended to limit the invention to the precise form disclosed, and obviously many modifications and variations are possible in light of the above teaching. The exemplary embodiments were chosen and described in order to explain certain principles of the invention and its practical application to enable one skilled in the art to make and use various exemplary embodiments of the invention and various alternatives and modifications as are suited to the particular use contemplated. It is intended that the scope of the invention be defined by the claims and their equivalents.
Claims (10)
1. A national secret encryption transmission method based on a common network camera is characterized by comprising the following steps:
collecting image data and carrying out national encryption on the image data by a first network camera, wherein the first network camera is in communication connection with a macro base station;
collecting image data by a second network camera and carrying out national encryption on the image data, wherein the second network camera is in communication connection with a first small cell base station;
sending, by a first network camera, a scheduling request to the macro base station in response to the national security encryption of the image data;
in response to receiving the scheduling request, transmitting, by the macro base station, a first PDCCH message to the first network camera on a first set of symbols of a first time slot, wherein the first PDCCH message occupies a first set of subcarriers, wherein the first set of subcarriers is a subset of a system frequency band, wherein the first set of symbols includes a first OFDM symbol and a second OFDM symbol of the first time slot, wherein the first PDCCH message indicates first PDSCH resources to the first network camera;
monitoring, by a first webcam, a first PDSCH message transmitted by a macro base station in response to receiving the first PDCCH message, wherein the first PDSCH message is transmitted on the first PDSCH resources, wherein the first PDSCH resources occupy a first set of symbols of a first time slot in a time domain and occupy a second set of subcarriers in a frequency domain, wherein the second set of subcarriers is a subset of a system frequency band, wherein the first PDSCH message includes a request for encrypted image data transmitted by the macro base station;
in response to receiving a request for the cryptographically encrypted image data, sending, by a first network camera, the cryptographically encrypted image data to the macro base station;
monitoring, by a first network camera, a signal quality of a reference signal transmitted by a macro base station;
determining, by a first network camera, whether interference between the first network camera and the second network camera exceeds an interference threshold based on a signal quality of a reference signal transmitted by a macro base station;
and if the interference between the first network camera and the second network camera exceeds an interference threshold, the first network camera monitors the reference signal and the system information sent by the second small cell base station.
2. The ordinary network camera-based national encryption transmission method as claimed in claim 1, wherein the ordinary network camera-based national encryption transmission method comprises the steps of:
in response to monitoring a reference signal and system information sent by a second small cell base station, establishing a communication connection with the second small cell base station by a first network camera, wherein the first network camera is in dual connection with the second small cell base station and the macro base station;
sending, by the first network camera, a scheduling request to the second small cell base station in response to the national security encryption of the image data;
in response to receiving the scheduling request, transmitting, by a second small cell base station, a second PDCCH message to the first webcam on a first set of symbols of a second time slot, wherein the second PDCCH message occupies a third set of subcarriers and a fourth set of subcarriers, wherein the third set of subcarriers and the fourth set of subcarriers are subsets of a system frequency band, wherein the third set of subcarriers is non-overlapping with the fourth set of subcarriers, wherein the first set of symbols includes a first OFDM symbol and a second OFDM symbol of the second time slot, wherein the second PDCCH message indicates a second PDSCH resource to the first webcam;
listening, by a first network camera, to a second PDSCH message transmitted by a second small cell base station in response to receiving the second PDCCH message, wherein the second PDSCH message is transmitted on the second PDSCH resource, wherein the second PDSCH resource occupies a first set of symbols of a second time slot in a time domain and occupies a fifth set of subcarriers and a sixth set of subcarriers in a frequency domain, wherein the fifth set of subcarriers and the sixth set of subcarriers are subsets of a system frequency band, wherein the fifth set of subcarriers and the sixth set of subcarriers do not overlap, wherein the second PDSCH message includes a request for encrypted image data transmitted by the second small cell base station;
in response to receiving the request for the image data encrypted with the national security, transmitting, by the first network camera, the image data encrypted with the national security to the second small cell base station.
3. The ordinary network camera-based national encryption transmission method as claimed in claim 2, wherein the ordinary network camera-based national encryption transmission method comprises the steps of:
monitoring, by the second small cell base station, a signal strength of a reference signal transmitted by the macro base station on the first transmit beam;
in response to monitoring the signal strength of the reference signal sent by the macro base station on the first transmission beam, the second small cell base station judges whether the signal strength of the reference signal sent by the macro base station on the first transmission beam is greater than a signal strength threshold value;
if the signal strength of the reference signal sent by the macro base station on the first transmission beam is judged to be greater than a signal strength threshold value, a third PDCCH message is sent by the second small cell base station to the first network camera on a first symbol set of a third time slot, wherein the third PDCCH message occupies a third subcarrier set and a fourth subcarrier set, the third subcarrier set and the fourth subcarrier set are subsets of a system frequency band, the third subcarrier set and the fourth subcarrier set are not overlapped, the first symbol set comprises a first OFDM symbol and a second OFDM symbol of the third time slot, and the third PDCCH message indicates a beam index of the first transmission beam to the first network camera.
4. A secret encryption transmission method based on a common network camera according to claim 3, characterized in that the secret encryption transmission method based on the common network camera comprises the following steps:
in response to receiving the third PDCCH message, listening, by the first network camera, for a fourth PDCCH message transmitted by the macro base station, wherein the fourth PDCCH message is transmitted by the macro base station to the first network camera on a first set of symbols of a fourth slot, wherein the fourth PDCCH message occupies a first set of subcarriers, wherein the first set of subcarriers is a subset of a system frequency band, wherein the first set of symbols includes a first OFDM symbol and a second OFDM symbol of the fourth slot, wherein the fourth PDCCH message indicates a first PUSCH resource to the first network camera;
in response to receiving the fourth PDCCH message, sending, by a first network camera, a beam index of the first transmit beam to the macro base station;
sending, by the macro base station, a message to the first network camera using a second transmit beam in response to receiving the beam index of the first transmit beam;
monitoring, by the second small cell base station, a signal strength of a reference signal sent by the macro base station on the second transmit beam;
in response to monitoring the signal strength of the reference signal sent by the macro base station on the second transmission beam, the second small cell base station judges whether the signal strength of the reference signal sent by the macro base station on the second transmission beam is greater than a signal strength threshold value;
if the signal strength of the reference signal sent by the macro base station on the second transmission beam is still greater than the signal strength threshold value, sending, by the second small cell base station, a fifth PDCCH message to the first network camera on a first symbol set of a fifth time slot, wherein the fifth PDCCH message occupies a third subcarrier set and a fourth subcarrier set, wherein the third subcarrier set and the fourth subcarrier set are subsets of a system frequency band, wherein the third subcarrier set and the fourth subcarrier set are non-overlapping, wherein the first symbol set includes a first OFDM symbol and a second OFDM symbol of the fifth time slot, and wherein the fifth PDCCH message indicates a beam index of the second transmission beam to the first network camera.
5. The ordinary network camera-based national encryption transmission method as claimed in claim 4, wherein the ordinary network camera-based national encryption transmission method comprises the steps of:
monitoring, by the first webcam, a sixth PDCCH message sent by the macro base station in response to receiving the fifth PDCCH message, wherein the sixth PDCCH message is sent by the macro base station to the first webcam on a first set of symbols of a sixth slot, wherein the sixth PDCCH message occupies a first set of subcarriers, wherein the first set of subcarriers is a subset of a system frequency band, wherein the first set of symbols includes a first OFDM symbol and a second OFDM symbol of the sixth slot, wherein the sixth PDCCH message indicates a second PUSCH resource to the first webcam;
in response to receiving the sixth PDCCH message, sending, by the first network camera, a beam index of the second transmit beam to the macro base station;
sending, by the macro base station, a message to the first network camera using a third transmit beam in response to receiving the beam index of the second transmit beam.
6. A national secret encryption transmission device based on a common network camera is characterized by comprising:
a unit for collecting image data by a first network camera and performing national encryption on the image data, wherein the first network camera is in communication connection with a macro base station;
the device comprises a unit for collecting image data by a second network camera and carrying out national encryption on the image data, wherein the second network camera is in communication connection with a first small cell base station;
means for sending, by a first network camera, a scheduling request to the macro base station in response to the image data being cryptographically secured;
means for transmitting, by a macro base station, a first PDCCH message to the first webcam on a first set of symbols of a first slot in response to receiving the scheduling request, wherein the first PDCCH message occupies a first set of subcarriers, wherein the first set of subcarriers is a subset of a system frequency band, wherein the first set of symbols includes a first OFDM symbol and a second OFDM symbol of the first slot, wherein the first PDCCH message indicates first PDSCH resources to the first webcam;
means for monitoring, by a first webcam, for a first PDSCH message transmitted by a macro base station in response to receiving the first PDCCH message, wherein the first PDSCH message is transmitted on the first PDSCH resources, wherein the first PDSCH resources occupy a first set of symbols of a first time slot in a time domain and occupy a second set of subcarriers in a frequency domain, wherein the second set of subcarriers is a subset of a system frequency band, wherein the first PDSCH message includes a request for encrypted image data sent by the macro base station;
means for transmitting, by a first network camera, the cryptographically encrypted image data to the macro base station in response to receiving a request for the cryptographically encrypted image data;
means for monitoring, by a first network camera, signal quality of a reference signal transmitted by a macro base station;
means for determining, by a first network camera, whether interference between the first network camera and the second network camera exceeds an interference threshold based on a signal quality of a reference signal transmitted by a macro base station;
and means for monitoring, by the first network camera, the reference signal and system information sent by the second small cell base station if it is determined that the interference between the first network camera and the second network camera exceeds an interference threshold.
7. The ordinary network camera-based national encryption transmission apparatus as claimed in claim 6, wherein the ordinary network camera-based national encryption transmission apparatus comprises:
means for establishing, by a first network camera, a communication connection with a second small cell base station in response to monitoring a reference signal and system information sent by the second small cell base station, wherein the first network camera is in dual connectivity with the second small cell base station and the macro base station;
means for transmitting, by a first network camera, a scheduling request to the second small cell base station in response to the image data being cryptographically secured;
means for transmitting, by a second small cell base station, a second PDCCH message to the first webcam on a first set of symbols of a second time slot in response to receiving the scheduling request, wherein the second PDCCH message occupies a third set of subcarriers and a fourth set of subcarriers, wherein the third set of subcarriers and the fourth set of subcarriers are subsets of a system frequency band, wherein the third set of subcarriers and the fourth set of subcarriers do not overlap, wherein the first set of symbols includes a first OFDM symbol and a second OFDM symbol of the second time slot, wherein the second PDCCH message indicates a second PDSCH resource to the first webcam;
means for listening, by a first network camera, to a second PDSCH message transmitted by a second small cell base station in response to receiving the second PDCCH message, wherein the second PDSCH message is transmitted on the second PDSCH resource, wherein the second PDSCH resource occupies a first set of symbols of a second time slot in a time domain and occupies a fifth set of subcarriers and a sixth set of subcarriers in a frequency domain, wherein the fifth set of subcarriers and the sixth set of subcarriers are subsets of a system frequency band, wherein the fifth set of subcarriers and the sixth set of subcarriers do not overlap, wherein the second PDSCH message includes a request for cipher-ciphered image data transmitted by the second small cell base station;
means for transmitting, by the first network camera, the cryptographically encrypted image data to the second small cell base station in response to receiving the request for the cryptographically encrypted image data.
8. The ordinary network camera-based national encryption transmission apparatus as claimed in claim 7, wherein the ordinary network camera-based national encryption transmission apparatus comprises:
means for listening, by a second small cell base station, for signal strength of a reference signal transmitted by a macro base station on a first transmit beam;
means for determining, by the second small cell base station, whether the signal strength of the reference signal sent by the macro base station on the first transmit beam is greater than a signal strength threshold in response to monitoring the signal strength of the reference signal sent by the macro base station on the first transmit beam;
means for transmitting, by a second small cell base station, a third PDCCH message to the first network camera on a first set of symbols of a third slot if it is determined that a signal strength of a reference signal transmitted by a macro base station on a first transmission beam is greater than a signal strength threshold, wherein the third PDCCH message occupies a third set of subcarriers and a fourth set of subcarriers, wherein the third set of subcarriers and the fourth set of subcarriers are subsets of a system frequency band, wherein the third set of subcarriers and the fourth set of subcarriers do not overlap, wherein the first set of symbols includes a first OFDM symbol and a second OFDM symbol of the third slot, and wherein the third PDCCH message indicates a beam index of the first transmission beam to the first network camera.
9. The ordinary network camera-based national encryption transmission apparatus as claimed in claim 8, wherein the ordinary network camera-based national encryption transmission apparatus comprises:
means for listening, by a first network camera, to a fourth PDCCH message transmitted by a macro base station in response to receiving the third PDCCH message, wherein the fourth PDCCH message is transmitted by the macro base station to the first network camera on a first set of symbols of a fourth slot, wherein the fourth PDCCH message occupies a first set of subcarriers, wherein the first set of subcarriers is a subset of a system frequency band, wherein the first set of symbols comprises a first OFDM symbol and a second OFDM symbol of the fourth slot, wherein the fourth PDCCH message indicates a first PUSCH resource to the first network camera;
means for transmitting, by a first network camera, a beam index of the first transmit beam to the macro base station in response to receiving the fourth PDCCH message;
means for transmitting, by a macro base station, a message to the first network camera using a second transmit beam in response to receiving the beam index of the first transmit beam;
means for listening, by the second small cell base station, for signal strength of a reference signal transmitted by the macro base station on a second transmit beam;
means for determining, by the second small cell base station, whether the signal strength of the reference signal sent by the macro base station on the second transmit beam is greater than a signal strength threshold in response to monitoring the signal strength of the reference signal sent by the macro base station on the second transmit beam;
means for transmitting, by a second small cell base station, a fifth PDCCH message to the first network camera on a first set of symbols of a fifth slot if it is determined that the signal strength of a reference signal transmitted by a macro base station on a second transmission beam is still greater than a signal strength threshold, wherein the fifth PDCCH message occupies a third set of subcarriers and a fourth set of subcarriers, wherein the third set of subcarriers and the fourth set of subcarriers are subsets of a system frequency band, wherein the third set of subcarriers and the fourth set of subcarriers do not overlap, wherein the first set of symbols includes a first OFDM symbol and a second OFDM symbol of the fifth slot, and wherein the fifth PDCCH message indicates a beam index of the second transmission beam to the first network camera.
10. The ordinary network camera-based national encryption transmission apparatus as claimed in claim 9, wherein the ordinary network camera-based national encryption transmission apparatus comprises:
means for monitoring, by a first network camera, for a sixth PDCCH message sent by a macro base station in response to receiving the fifth PDCCH message, wherein the sixth PDCCH message is sent by the macro base station to the first network camera on a first set of symbols of a sixth slot, wherein the sixth PDCCH message occupies a first set of subcarriers, wherein the first set of subcarriers is a subset of a system frequency band, wherein the first set of symbols comprises a first OFDM symbol and a second OFDM symbol of the sixth slot, wherein the sixth PDCCH message indicates a second PUSCH resource to the first network camera;
means for transmitting, by the first network camera, a beam index of the second transmit beam to the macro base station in response to receiving the sixth PDCCH message;
means for transmitting, by the macro base station, a message to the first network camera using a third transmit beam in response to receiving the beam index of the second transmit beam.
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