CN113727397A - Method for cooperative communication of high-low frequency network system - Google Patents
Method for cooperative communication of high-low frequency network system Download PDFInfo
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- CN113727397A CN113727397A CN202110981235.3A CN202110981235A CN113727397A CN 113727397 A CN113727397 A CN 113727397A CN 202110981235 A CN202110981235 A CN 202110981235A CN 113727397 A CN113727397 A CN 113727397A
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W36/00—Hand-off or reselection arrangements
- H04W36/0005—Control or signalling for completing the hand-off
- H04W36/0011—Control or signalling for completing the hand-off for data sessions of end-to-end connection
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W36/00—Hand-off or reselection arrangements
- H04W36/24—Reselection being triggered by specific parameters
- H04W36/32—Reselection being triggered by specific parameters by location or mobility data, e.g. speed data
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W64/00—Locating users or terminals or network equipment for network management purposes, e.g. mobility management
Abstract
The invention discloses a method for cooperative communication of a high-frequency network system and a low-frequency network system, which comprises the following steps: positioning: determining the position of the terminal by using a low-frequency network; frequency boosting: the core network sends a corresponding instruction to the high-frequency base station, and the terminal switches the network frequency band; connecting: the high-frequency base station makes the high-frequency network antenna beam form according to the positioning information, establishes connection with the terminal and carries out high-frequency network service; frequency reduction: after the terminal is used, the connection of the high-frequency communication network is released, and the connection is reduced to the low-frequency network.
Description
Technical Field
The invention relates to the field of wireless coverage of mobile communication base stations, in particular to a method for cooperative communication of a high-frequency and low-frequency network system.
Background
Frequency is a valuable resource in mobile communication systems, with the occupation of 2, 3, 4, 5G communication systems and various private network frequency bands. The high-frequency resource is a development trend, the high-frequency bandwidth is large, the occupation is small, the resource is rich, and higher bandwidth, lower time delay and larger connection quantity can be provided for users. However, the large bandwidth of high frequency systems presents a range of signal coverage problems. The higher the frequency, the greater the signal loss per unit distance. The wider the bandwidth, the lower the power per unit of spectrum, for equivalent device transmit power. For example, a 20MLTE bandwidth system of 1.8GHz and a 100MHz 5GNR bandwidth system of 3.5GHz have doubled frequency spectrum and 6dB larger space loss; the radio frequency power of the 20W LTE base station device per 1MHz bandwidth is 1W (30 dBm). The radio frequency power per 1MHz of a 20W 5GNR base station device is only 0.2W (23 dBm); at the same power, the gap of coverage increases to 13 dB. Although the high-frequency communication system uses various antenna shaping and mimo technologies, the problem that the coverage distance of the traditional coverage method is shorter when the frequency of the communication system is higher is not changed substantially;
the mobile user terminal can be compatible with various frequency bands and various communication systems, and common frequency bands include 800MHz, 900Mhz, 1.8GHz, 2.1GHz, 2.6GHz, 3.5GHz and 4.9GHz, 24-52GHz of a 5G system, a 6G system frequency band, a terahertz frequency band and the like. Low frequency communication systems are generally ubiquitous as infrastructure overlay networks. Users can utilize the underlying network for communication services in most areas. The high-frequency system has obvious shrinkage of the omnibearing coverage range due to frequency and bandwidth factors, so that how to achieve equivalent coverage distance between the high-frequency system and the low-frequency system under the condition of limited power and enable a user to feel the advantages of the high-frequency system in the high-frequency system is a problem to be solved urgently.
Disclosure of Invention
Aiming at the defects in the technology, the invention provides a method for cooperative communication of a high-frequency and low-frequency network system, which is used for acquiring the direction of a user by using a low-frequency basic network, avoiding the defect of narrow beam of a radio signal of the high-frequency system, realizing the long-distance flexible coverage of the high-frequency system and improving the target of user service experience to the maximum extent.
In order to achieve the above object, the present invention provides a method for collaborative communication in a high-frequency and low-frequency network system, comprising the following steps:
positioning: determining the position of the terminal by using a low-frequency network;
frequency boosting: the core network sends a corresponding instruction to the high-frequency base station, and the terminal switches the network frequency band;
connecting: the high-frequency base station makes the high-frequency network antenna beam form according to the positioning information, establishes connection with the terminal and carries out high-frequency network service;
frequency reduction: and after the terminal is used, releasing the connection of the high-frequency communication network and reducing the connection to the low-frequency network.
Preferably, in the positioning step, a positioning unit carried by the terminal is used for accurately positioning the position of the terminal, then positioning information and terminal information are transmitted into a core network, the core network selects a high-frequency base station closest to the terminal according to the positioning information, then the positioning information and the terminal information are sent into the high-frequency base station, and the high-frequency base station receives relevant information and then processes the information to acquire an azimuth angle, a pitch angle, distance information and model information of the terminal between the high-frequency base station and the terminal.
Preferably, the terminal information includes model information of the terminal and high frequency band information required by the terminal, and the core network selects a high frequency base station capable of transmitting the high frequency band according to the high frequency band information required by the terminal and transmits related information to the high frequency base station.
Preferably, in the frequency increasing step, the terminal sends the frequency band information to the core network and switches to the frequency band at the same time; the core network forwards the frequency band information to the high-frequency base station, and the high-frequency base station receives the frequency band information and then generates the frequency band signal.
Preferably, in the connection step, the high-frequency base station performs correlation calculation according to the position information of the terminal, and forms a beam of the generated high-frequency network antenna, so as to accurately connect with the terminal; after the connection is finished, the terminal and the high-frequency base station simultaneously send pairing information to the core network for adaptive registration.
Preferably, after the terminal establishes communication connection with the high-frequency base station, the high-frequency base station sends a position information confirmation instruction to the terminal again, the terminal receives the position information and then sends the position information to the high-frequency base station continuously, the high-frequency base station adjusts the antenna beam forming parameters continuously according to the position information of the terminal, and the connection is established with the terminal in a narrow beam mode, so that the terminal receives the optimal high-frequency information.
Preferably, the core network stores the information which is matched and registered, and establishes a storage library by taking the model information of the terminal as a storage tag; when the terminal is connected with the core network in a pairing way, screening is firstly carried out in a storage library to obtain relevant information of the terminal, and then the relevant information is transmitted to a high-frequency base station which is connected with the terminal in a pairing way, so that quick connection is realized.
Preferably, in the frequency reducing step, after the terminal completes the corresponding high-frequency service, a disconnection instruction is sent to the core network and the high-frequency base station, and then the terminal is switched to the low-frequency network; after receiving the disconnection instruction, the core network releases the adaptive registration of the terminal and the high-frequency base station; and after receiving the disconnection instruction, the high-frequency base station stops sending the high-frequency signal to the terminal.
Preferably, in the up-conversion step, if there is no high-frequency base station required by the terminal in the core network, the plurality of core networks are coordinated with each other, and a high-frequency base station required by the terminal is selected from another core network and connected to the terminal.
Preferably, the terminal is always in a low frequency network state and switches to a high frequency network state if and only if there is a high frequency demand.
The invention has the beneficial effects that: the method for the cooperative communication of the high-frequency and low-frequency network systems provided by the invention has the advantages that the high-frequency and low-frequency communication frequency bands are arranged in the same core network or different core networks, the low-frequency communication frequency band is utilized to realize simple communication and positioning, and if the terminal needs to adopt the high-frequency communication frequency band, the terminal is firstly converted into the high-frequency band from the low-frequency band. Meanwhile, the terminal is connected with the high-frequency base station, the terminal is disconnected after the corresponding processing is completed on the high-frequency network, the high-frequency network resources are released, and the terminal is lowered to the low-frequency communication frequency band to work, so that a user can select the terminal according to different requirements when using the terminal, the waste of the high-frequency network resources is avoided, and the related resources are effectively saved.
Drawings
FIG. 1 is a flow chart of the steps of the present invention.
Detailed Description
In order to make the present invention clearer, the present invention is further described below with reference to the accompanying drawings and examples.
Referring to fig. 1, the present invention discloses a method for cooperative communication of a high-frequency network system and a low-frequency network system, which comprises the following steps: positioning: determining the position of the terminal by using a low-frequency network; frequency boosting: the core network sends a corresponding instruction to the high-frequency base station, and the terminal switches the network frequency band; connecting: the high-frequency base station makes the high-frequency network antenna beam form according to the positioning information, establishes connection with the terminal and carries out high-frequency network service; frequency reduction: and after the terminal is used, releasing the connection of the high-frequency communication network and reducing the connection to the low-frequency network. In the embodiment, the terminal at the low frequency end is positioned by using the positioning step, so that all high frequency band resources can be applied to specific services instead of basic information transmission after being in a high frequency band state, and the utilization rate of the high frequency band resources is improved; after the terminal is positioned, the terminal performs high-frequency switching, and establishes a connection pairing relation between the high-frequency base station and the terminal, so that a communication frequency band generated by the high-frequency base station can be effectively received by the terminal; after the specific service is processed, the terminal disconnects from the high-frequency base station, releases the high-frequency communication network and converts the high-frequency communication network into a low-frequency communication network, so that the use of the high-frequency communication network is cancelled, and resources are saved.
In order to achieve the purpose, in the positioning step, a positioning unit carried on a terminal is used for accurately positioning the position of the terminal, positioning information and terminal information are transmitted into a core network, the core network selects a high-frequency base station closest to the terminal according to the positioning information, then the positioning information and the terminal information are sent into the high-frequency base station, and the high-frequency base station receives relevant information and then processes the information to obtain an azimuth angle, a pitch angle, distance information and model information of the terminal between the high-frequency base station and the terminal; the terminal information comprises model information of the terminal and high-frequency band information required by the terminal, and the core network selects a high-frequency base station capable of sending the high-frequency band according to the high-frequency band information required by the terminal and sends related information to the high-frequency base station. In this embodiment, since the coverage area of the high frequency base station is small, in order to enable the high frequency base station and the terminal to effectively establish stable connection, it is necessary to effectively locate the position of the terminal first, the terminal sends related position information to the core network, the core network searches for the high frequency base station closest to the position in the core network after receiving the position information, and then sends the location information and the terminal information to the high frequency base station, and the high frequency base station calculates the direction angle, the pitch angle, the distance information and the like between the high frequency base station and the terminal by combining the position information of the high frequency base station after receiving the information, so that the antenna emission angle of the high frequency base station can be effectively adjusted, and the subsequently sent signals can be effectively received by the terminal, thereby performing subsequent professional application; in order to prevent a plurality of terminals from appearing in the same area, so that a high-frequency signal sent by a high-frequency base station cannot accurately act on the terminals, the high-frequency base station carries model information of the terminals while sending the high-frequency signal, and the high-frequency signal can be received by the terminals when and only when the model information of the carried terminals corresponds to the terminals, so that disorder of the high-frequency signal is avoided.
In the frequency increasing step, firstly, a terminal sends a frequency band change request to a core network; the core network transmits the frequency band information to the high-frequency base station, and the high-frequency base station generates the frequency band signal after receiving the frequency band information and assigns the signal to the terminal user. Firstly, a terminal is in a most basic low-frequency range, can only meet daily communication requirements and cannot be applied to some professional applications, so that the terminal needs to be converted into a high-frequency range capable of bearing more data, thereby performing professional applications, the high-frequency range is a broad general term, in order to better realize data butt joint, a proper frequency range is selected in the high-frequency range, the range value is transmitted into a high-frequency base station through a core network, and meanwhile, the terminal performs frequency range switching, and switches the frequency range capable of being received by the terminal into the high-frequency range; the high frequency base station sends the frequency band signal to the terminal through self adjustment after receiving the frequency band information sent by the core network, and at the moment, the terminal and the high frequency base station are in the same frequency band, so the high frequency base station can be directly connected with the terminal without conversion through the core network, the transmission of the high frequency signal is more rapid and stable, and the signal loss or abnormity can not occur.
In the connection step, the high-frequency base station performs related calculation according to the position information of the terminal, and forms the generated high-frequency network antenna beam, so as to accurately connect with the terminal; after the connection is finished, the terminal and the high-frequency base station simultaneously send pairing information to the core network for adaptive registration. In the specific implementation process, a high-frequency signal between a high-frequency base station and a terminal is processed by utilizing a beamforming algorithm, so that the connection of the high-frequency signal is more stable; after the terminal is matched with the high-frequency base station, adaptive registration is carried out in the core network.
More specifically, after the terminal establishes communication connection with the high-frequency base station, the high-frequency base station sends a position information confirmation instruction to the terminal again, the terminal receives the position information and then sends the position information to the high-frequency base station continuously, the high-frequency base station continuously adjusts antenna beam forming parameters according to the position information of the terminal, and the high-frequency base station establishes connection with the terminal in a narrow beam mode, so that the terminal receives the optimal high-frequency information; the core network stores the information which is adapted and registered, and establishes a storage library by taking the model information of the terminal as a storage tag; when the terminal is connected with the core network in a matching way, screening is firstly carried out in a storage library to obtain relevant information of the terminal, and then the relevant information is transmitted into a high-frequency base station which is connected with the terminal in a matching way, so that quick connection is realized, in the specific using process, the position of the terminal is possibly changed, so that the signal transmission is better realized, and the stability of transmission is ensured, particularly, the high-frequency base station and the terminal are confirmed again in position, meanwhile, in the subsequent high-frequency signal transmission stage, the position information of the terminal is continuously transmitted, so that the high-frequency base station can continuously adjust relevant parameter information according to the position of the terminal, the situation that the signals sent by the high-frequency base station cannot accurately correspond due to the change of the position of the terminal is avoided, when the position of the terminal exceeds the area range which can be covered by the high-frequency base station, and the high-frequency base station sends related information to the core network, and the core network sends related instructions to the terminal again, so that a new high-frequency base station or a new low-frequency base station is adopted to be connected with the terminal.
In the frequency reduction step, after the terminal finishes corresponding high-frequency service, the high-frequency base station sends a disconnection instruction to enable the terminal to be switched to a low-frequency network and then disconnected with the high-frequency base station; and after receiving the disconnection instruction, the high-frequency base station stops sending the high-frequency signal to the terminal. In this embodiment, after the high frequency is used, the terminal performs a frequency reduction operation to release all the high frequencies, so as to reduce resource waste, more specifically, the terminal sends a disconnection instruction to the high frequency base station and the core network at the same time, the core network receives the instruction and then sends an inquiry instruction to the terminal to determine whether to disconnect the terminal, the terminal receives the instruction and then confirms the instruction, the confirmed instruction information is transmitted to the core network and the high frequency base station, and the core network releases the adaptation registration between the terminal and the high frequency base station and stores the relevant adaptation information; meanwhile, after receiving the instruction information, the high-frequency base station disconnects the connection with the terminal; in addition, after the terminal finishes the frequency reduction, the low-frequency connection is established with the core network again.
In the frequency increasing step, if the core network does not have the high-frequency base station which meets the requirement of the terminal, the core networks are matched with each other, and the high-frequency base station which meets the requirement is selected from another core network to be connected with the terminal. In this embodiment, in order to save the base station construction cost, the number of high frequency base stations constructed in the same area is constant, but the terminals served by the high frequency base stations have strong mobility, so that the high frequency base stations adapted to the terminals cannot exist in the area, at this time, mutual communication between a plurality of core networks is required, a signal generated by the high frequency base station adapted to the terminal in another core network is intercepted, then the signal is transferred to the high frequency base station closest to the terminal, and then the signal is sent to the terminal, at this time, the core network and the high frequency base station are equivalent to a signal repeater, so that stable receiving and transmitting of the signal are realized, and professional requirements are fulfilled.
The present invention is described below by way of specific examples, but the scope of the present invention is not limited thereto, and those skilled in the art will appreciate variations without inventive faculty.
The description will be made by taking an mmWave band of 5G high frequency and a 1.8GHz band of 4G as examples. Firstly, a terminal resides on a 1.8G basic network, and when the basic 1.8G network cannot meet the needs of the terminal, and the terminal needs higher speed or other services needing high-frequency mmWave network service, a 1.8GHz network collects the model parameters of the terminal such as the capacity of supporting the mmWave high-frequency network, the position of the terminal, the azimuth angle from a base station to the terminal, the pitch angle and the like. After the parameters are collected by the 1.8GHz network, the high-frequency mmWave base station terminal is informed to support the high-frequency mmWave network through the core network, and meanwhile, the terminal is switched to the high-frequency network to serve as a service. And then acquiring model parameters such as an azimuth angle, a pitch angle and the like of the terminal by the high-frequency mmWave network base station antenna. The high-frequency network antenna beam forming is realized, and a terminal needing a high-frequency network can be accurately found. After the communication between the high-frequency mmWave network and the terminal is established, the antenna forming parameters are corrected according to the accurate measurement of the high-frequency mmWave network and the terminal. And finally, the optimal high-frequency mmWave network service quality target for the terminal is realized.
After the terminal finishes the corresponding service requiring the mmWave high-frequency network, the terminal falls back to the 1.8GHz network, and the low-frequency 1.8GHz network is used for meeting the basic communication requirement; the connection of the high frequency communication network is released.
The above disclosure is only for a few specific embodiments of the present invention, but the present invention is not limited thereto, and any variations that can be made by those skilled in the art are intended to fall within the scope of the present invention.
Claims (10)
1. A method for cooperative communication of high and low frequency network systems is characterized by comprising the following steps:
positioning: determining the position of the terminal by using a low-frequency network;
frequency boosting: the core network sends a corresponding instruction to the high-frequency base station, and the terminal switches the network frequency band;
connecting: the high-frequency base station makes the high-frequency network antenna beam form according to the positioning information, establishes connection with the terminal and carries out high-frequency network service;
frequency reduction: and after the terminal is used, releasing the connection of the high-frequency communication network and reducing the connection to the low-frequency network.
2. The method according to claim 1, wherein in the step of positioning, a positioning unit carried by the terminal is used to accurately position the location of the terminal, the positioning information and the terminal information are transmitted to a core network, the core network selects a high frequency base station closest to the terminal according to the positioning information, the positioning information and the terminal information are transmitted to the high frequency base station, and the high frequency base station receives the relevant information and processes the information to obtain an azimuth angle, a pitch angle, distance information between the high frequency base station and the terminal, and model information of the terminal.
3. The method according to claim 2, wherein the terminal information includes model information of the terminal and high band information required by the terminal, the core network selects a high band base station capable of transmitting the high band according to the high band information required by the terminal, and transmits related information to the high band base station.
4. The method according to claim 1, wherein in the step of frequency up-conversion, the terminal first sends frequency band information to the core network, and switches to the frequency band; the core network forwards the frequency band information to the high-frequency base station, and the high-frequency base station receives the frequency band information and then generates the frequency band signal.
5. The method according to claim 1, wherein in the connection step, the high frequency base station performs correlation calculation according to the location information of the terminal, and forms the generated high frequency network antenna beam, so as to accurately connect with the terminal; after the connection is finished, the terminal and the high-frequency base station simultaneously send pairing information to the core network for adaptive registration.
6. The method according to claim 5, wherein after the terminal establishes communication connection with the high frequency base station, the high frequency base station sends a position information confirmation command to the terminal again, the terminal receives the position information and then sends the position information to the high frequency base station without interruption, and the high frequency base station adjusts the antenna beam forming parameters according to the position information of the terminal without interruption, and establishes connection with the terminal in a narrow beam manner, so that the terminal receives the best high frequency information.
7. The method for collaborative communication in a high and low frequency network system according to claim 5, wherein the core network stores the adapted registered information, and establishes a repository with model information of the terminal as a storage tag; when the terminal is connected with the core network in a pairing way, screening is firstly carried out in a storage library to obtain relevant information of the terminal, and then the relevant information is transmitted to a high-frequency base station which is connected with the terminal in a pairing way, so that quick connection is realized.
8. The method according to claim 1, wherein in the step of reducing frequency, after the terminal has performed the corresponding high frequency service, the terminal sends a disconnection command to the core network and the high frequency base station, and then switches to the low frequency network; after receiving the disconnection instruction, the core network releases the adaptive registration of the terminal and the high-frequency base station; and after receiving the disconnection instruction, the high-frequency base station stops sending the high-frequency signal to the terminal.
9. The method according to claim 1, wherein in the step of frequency up-converting, if there is no high frequency base station in the core network that meets the requirements of the terminal, then the core networks are mutually matched, and the high frequency base station that meets the requirements is selected from another core network to connect with the terminal.
10. A method for cooperative communication of high and low frequency network systems according to claim 1, wherein the terminal is always in the low frequency network state, and switches to the high frequency network state if and only if there is a high frequency requirement.
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| US20180098260A1 (en) * | 2016-05-24 | 2018-04-05 | Telefonaktiebolaget Lm Ericsson (Publ) | Improved handover in high speed scenario |
| CN106888046A (en) * | 2016-08-12 | 2017-06-23 | 中国移动通信有限公司研究院 | A kind of high-frequency communication cut-in method based on LF communication, base station and user terminal |
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