CN112383938B - Multi-host millimeter wave relay system and access method thereof - Google Patents

Multi-host millimeter wave relay system and access method thereof Download PDF

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CN112383938B
CN112383938B CN202011085978.4A CN202011085978A CN112383938B CN 112383938 B CN112383938 B CN 112383938B CN 202011085978 A CN202011085978 A CN 202011085978A CN 112383938 B CN112383938 B CN 112383938B
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millimeter wave
relay
signal block
synchronous signal
optimal
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CN112383938A (en
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黄联芬
陈宁
王健铮
杨泽靖
何维晟
高志斌
黄鹏飞
杨子
杨波
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Xiamen University
Comba Network Systems Co Ltd
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Comba Network Systems Co Ltd
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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
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04B—TRANSMISSION
    • H04B7/00—Radio transmission systems, i.e. using radiation field
    • H04B7/14—Relay systems
    • H04B7/15—Active relay systems
    • H04B7/155—Ground-based stations
    • H04B7/15528—Control of operation parameters of a relay station to exploit the physical medium
    • H04B7/15542—Selecting at relay station its transmit and receive resources
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W24/00—Supervisory, monitoring or testing arrangements
    • H04W24/10—Scheduling measurement reports ; Arrangements for measurement reports
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W72/00—Local resource management
    • H04W72/04—Wireless resource allocation
    • H04W72/044—Wireless resource allocation based on the type of the allocated resource
    • H04W72/046—Wireless resource allocation based on the type of the allocated resource the resource being in the space domain, e.g. beams
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W72/00—Local resource management
    • H04W72/50—Allocation or scheduling criteria for wireless resources
    • H04W72/54—Allocation or scheduling criteria for wireless resources based on quality criteria
    • H04W72/542—Allocation or scheduling criteria for wireless resources based on quality criteria using measured or perceived quality

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Abstract

The invention discloses a multi-host millimeter wave relay system, a medium and an access method thereof, wherein the method comprises the following steps: a base station sends a downlink scanning beam; the millimeter wave relay sends a plurality of wide beams to the base station side within each downlink scanning beam time interval to determine the optimal wide beam until an optimal wide beam vector is generated; selecting an optimal wide beam corresponding to each downlink scanning beam to receive the downlink scanning beam, generating a relay synchronization signal block and transmitting the relay synchronization signal block at a user side; the user equipment receives the synchronous signal block or the relay synchronous signal block, evaluates the synchronous signal block or the relay synchronous signal block to judge whether the synchronous signal block or the relay synchronous signal block meets the requirement, and adds the synchronous signal block or the relay synchronous signal block into the candidate link group when the judgment result is yes; the edge cloud server selects a millimeter wave communication link; the user equipment carries out communication access through the millimeter wave communication link; the method can give full play to the directionality and bandwidth advantages of millimeter wave wireless communication, enlarge the coverage range of millimeter wave signals and realize ultrahigh-speed data transmission through a millimeter wave wireless communication system.

Description

Multi-host millimeter wave relay system and access method thereof
Technical Field
The present invention relates to the field of mobile communications technologies, and in particular, to a multi-homed millimeter wave relay system, an access method thereof, and a computer-readable storage medium.
Background
In the related art, in the process of communication using radio waves of a 60Ghz band; if the communication quality is inconvenient to maintain, the transmission distance of the system is severely limited; if the transmission distance is inconvenient to maintain, the communication quality is deteriorated, and the information transmission is interrupted; it is difficult to efficiently use radio waves for ultra high speed data transmission.
Disclosure of Invention
The present invention is directed to solving, at least to some extent, one of the technical problems in the art described above. Therefore, an object of the present invention is to provide an access method for a multi-homed millimeter wave relay system, which can fully utilize the bandwidth advantage of a millimeter wave wireless communication system and realize ultra-high speed data transmission through the millimeter wave wireless communication system.
A second object of the invention is to propose a computer-readable storage medium.
A third object of the present invention is to provide a multi-homed millimeter wave relay system.
In order to achieve the above object, an embodiment of a first aspect of the present invention provides an access method for a multi-homed millimeter wave relay system, including the following steps: a base station sends a downlink scanning beam in a downlink beam scanning period, wherein the downlink scanning beam comprises a synchronous signal block; the millimeter wave relays in the duration time of the downlink scanning beam, a plurality of wide beams used for receiving corresponding synchronous signal blocks are sent at the base station side, so that the optimal wide beam corresponding to the downlink scanning beam is determined, and the corresponding optimal wide beam vector is generated according to the optimal wide beam; the millimeter wave relay selects a corresponding optimal wide beam according to the optimal wide beam vector to receive the downlink scanning beam, amplifies a received synchronous signal block to generate a relay synchronous signal block, and sends the relay synchronous signal block through a user side beam; the user equipment receives the synchronous signal block or the relay synchronous signal block, performs signal quality evaluation on the synchronous signal block or the relay synchronous signal block to judge whether a transmission link corresponding to the synchronous signal block or the relay synchronous signal block meets the requirement of a communication link, and adds the transmission link corresponding to the synchronous signal block or the relay synchronous signal block into a candidate link group when the judgment result is yes; the user equipment sends the candidate link group to an edge cloud server so that the edge cloud server can select a millimeter wave communication link of the user equipment according to the candidate link group; and the user equipment carries out communication access according to the millimeter wave communication link.
According to the multi-host millimeter wave relay system access method provided by the embodiment of the invention, firstly, a base station sends a downlink scanning beam in a downlink beam scanning period, wherein the downlink scanning beam comprises a synchronous signal block; then, the millimeter wave relay transmits a plurality of wide beams for receiving corresponding synchronous signal blocks at the base station side within the duration of the downlink scanning beam to determine an optimal wide beam corresponding to the downlink scanning beam, and generates a corresponding optimal wide beam vector according to the optimal wide beam, so that the optimal wide beams corresponding to different downlink scanning beams can be subsequently determined according to the optimal wide beams; then, the millimeter wave relay selects a corresponding optimal wide beam according to the optimal wide beam vector to receive the downlink scanning beam, amplifies a received synchronous signal block to generate a relay synchronous signal block, and sends the relay synchronous signal block through a user side beam; then, the user equipment receives the synchronization signal block or the relay synchronization signal block, and performs signal quality evaluation on the synchronization signal block or the relay synchronization signal block to judge whether a transmission link corresponding to the synchronization signal block or the relay synchronization signal block meets a communication link requirement, and when the judgment result is yes, adds the transmission link corresponding to the synchronization signal block or the relay synchronization signal block into a candidate link group; then, the user equipment sends the candidate link group to an edge cloud server, so that the edge cloud server can select a millimeter wave communication link of the user equipment according to the candidate link group; the user equipment carries out communication access according to the millimeter wave communication link; therefore, the bandwidth advantage of the millimeter wave wireless communication system is fully exerted, and the ultra-high speed transmission of data through the millimeter wave wireless communication system is realized.
In addition, the access method of the multi-homed millimeter wave relay system proposed by the above embodiment of the present invention may further have the following additional technical features:
optionally, determining an optimal wide beam corresponding to the downlink scanning beam includes: calculating the first signal power of each wide beam received synchronization signal block, and judging whether the first signal power is greater than a preset first signal power threshold value; if so, the wide beam is taken as a preselected wide beam; and acquiring first signal power maximum values corresponding to all the preselected wide beams, and taking the preselected wide beams corresponding to the first signal power maximum values as the optimal wide beams.
Optionally, the first signal power is calculated according to the following formula:
Figure BDA0002720401420000021
wherein j is more than or equal to 1 and less than or equal to NR,1≤s≤m，1≤i≤NB，1≤k≤n，
Figure BDA0002720401420000022
Represents the equivalent omni-directional radiated power of the downlink scanning beam transmitted by the base station,
Figure BDA0002720401420000023
representing the reception antenna gain of the millimeter wave relay corresponding to the base station side wide beam,
Figure BDA0002720401420000024
represents the beamforming gain, L, of the millimeter wave relay corresponding to the wide beam at the base station sidetransRepresenting the loss of the signal during transmission,
Figure BDA0002720401420000025
representing the feeder loss, I, of the millimeter wave relay receiving antennamargin_downIndicating the downlink interference margin.
Optionally, the performing signal quality evaluation on the synchronization signal block or the relay synchronization signal block to determine whether a transmission link corresponding to the synchronization signal block or the relay synchronization signal block meets a communication link requirement includes: calculating second signal power corresponding to each synchronization signal block or each relay synchronization signal block, and judging whether the second signal power is greater than a preset second signal power threshold value; and if so, considering that the transmission link corresponding to the synchronization signal block or the relay synchronization signal block corresponding to the second signal power threshold meets the requirement of the communication link.
Optionally, the second signal power is calculated according to the following formula:
Figure BDA0002720401420000031
wherein j is more than or equal to 1 and less than or equal to NR,1≤s≤l，1≤i≤NB，1≤k≤Nu，1≤v≤n，1≤h≤BeamU，
Figure BDA0002720401420000032
Representing the equivalent omnidirectional radiated power of the downlink scanning beam transmitted by the millimeter wave base station,
Figure BDA0002720401420000033
representing the receive antenna gain of the mm wave relay corresponding to the base station side fine beam,
Figure BDA0002720401420000034
representing the beamforming gain of the mm wave relay corresponding to the base station side fine beam,
Figure BDA0002720401420000035
representing the equivalent omni-directional radiated power of the user-side beam of the millimeter wave relay,
Figure BDA0002720401420000036
indicating the receive antenna gain of the user equipment corresponding to the user receive beam,
Figure BDA0002720401420000037
denotes the beamforming gain, L, of the user equipment corresponding to the user's receive beamtransRepresenting the loss of the signal during transmission, LfeederRepresents the feeder loss of the millimeter wave base station, the millimeter wave relay and the receiving antenna of the user equipment, Imargin_downIndicating the downlink interference margin.
Optionally, the selecting, by the edge cloud server, the millimeter wave communication link of the user equipment according to the candidate link group includes: the edge cloud server constructs a multi-domain graph model corresponding to a coverage area, wherein the multi-domain graph model takes the base station, the millimeter wave relay and the user equipment as nodes, takes a communication link of the base station, the millimeter wave relay and the user equipment as an edge, and takes normalized effective link power as a weight; combining the base station nodes and the millimeter wave relay nodes which are connected with each other with edges to generate corresponding bipartite-like models, searching for the amplification paths corresponding to the bipartite-like models according to a Kuhn-Munkras algorithm, and storing the obtained optimal matching components into an optimal matching matrix; and acquiring the non-repeated optimal combination matching in the optimal matching matrix, and taking a communication path corresponding to the non-repeated optimal combination matching as a millimeter wave communication link of the user equipment.
Optionally, after generating the corresponding optimal wide beam vector according to the optimal wide beam, the method further includes: the millimeter wave relay sends a plurality of fine receiving beams in a coverage range corresponding to each optimal wide beam so as to perform fine receiving beam scanning on the base station side, generates an optimal fine receiving beam corresponding to the optimal wide beam according to a scanning result, and generates an optimal fine receiving beam vector according to the optimal fine receiving beam.
In order to achieve the above object, a second embodiment of the present invention provides a computer-readable storage medium, on which a multi-homed millimeter wave relay system access program is stored, and when executed by a processor, the multi-homed millimeter wave relay system access program implements the multi-homed millimeter wave relay system access method as described above.
According to the computer-readable storage medium of the embodiment of the invention, the multi-host millimeter wave relay system access program is stored, so that when the processor executes the multi-host millimeter wave relay system access program, the multi-host millimeter wave relay system access method is realized, the bandwidth advantage of a millimeter wave wireless communication system is fully exerted, and the ultra-high speed transmission of data through the millimeter wave wireless communication system is realized.
In order to achieve the above object, a third embodiment of the present invention provides a multi-homed millimeter wave relay system, including: the system comprises a base station, a millimeter wave relay, user equipment and an edge cloud server; the base station is configured to send a downlink scanning beam in a downlink beam scanning period, where the downlink scanning beam includes a synchronization signal block; the millimeter wave relay is used for sending a plurality of wide beams for receiving corresponding synchronous signal blocks at the base station side within the duration time of the downlink scanning beam so as to determine the optimal wide beam corresponding to the downlink scanning beam and generate a corresponding optimal wide beam vector according to the optimal wide beam; the millimeter wave relay is also used for selecting a corresponding optimal wide beam according to the optimal wide beam vector to receive the downlink scanning beam, amplifying a received synchronous signal block to generate a relay synchronous signal block and sending the relay synchronous signal block through a user side beam; the user equipment is used for receiving the synchronous signal block or the relay synchronous signal block, evaluating the signal quality of the synchronous signal block or the relay synchronous signal block to judge whether a transmission link corresponding to the synchronous signal block or the relay synchronous signal block meets the requirement of a communication link, and adding the transmission link corresponding to the synchronous signal block or the relay synchronous signal block into a candidate link group when the judgment result is yes; the edge cloud server is used for acquiring a candidate link group sent by user equipment, selecting a millimeter wave communication link of the user equipment according to the candidate link group, and sending the millimeter wave communication link to the user equipment, so that the user equipment can perform communication access according to the millimeter wave communication link.
According to the multi-homed millimeter wave relay system of the embodiment of the invention; the base station is configured to send a downlink scanning beam in a downlink beam scanning period, wherein the downlink scanning beam comprises a synchronization signal block; the millimeter wave relay is used for sending a plurality of wide beams for receiving corresponding synchronous signal blocks at the base station side within the duration time of the downlink scanning beam so as to determine the optimal wide beam corresponding to the downlink scanning beam and generate a corresponding optimal wide beam vector according to the optimal wide beam; the millimeter wave relay is also used for selecting a corresponding optimal wide beam according to the optimal wide beam vector to receive the downlink scanning beam, amplifying a received synchronous signal block to generate a relay synchronous signal block and sending the relay synchronous signal block through a user side beam; the user equipment is used for receiving the synchronous signal block or the relay synchronous signal block, evaluating the signal quality of the synchronous signal block or the relay synchronous signal block to judge whether a transmission link corresponding to the synchronous signal block or the relay synchronous signal block meets the requirement of a communication link, and adding the transmission link corresponding to the synchronous signal block or the relay synchronous signal block into a candidate link group when the judgment result is yes; the edge cloud server is used for acquiring a candidate link group sent by user equipment, selecting a millimeter wave communication link of the user equipment according to the candidate link group, and sending the millimeter wave communication link to the user equipment so that the user equipment can carry out communication access according to the millimeter wave communication link; therefore, the bandwidth advantage of the millimeter wave wireless communication system is fully exerted, and the ultra-high speed transmission of data through the millimeter wave wireless communication system is realized.
In addition, the multi-homed millimeter wave relay system proposed according to the above embodiment of the present invention may also have the following additional technical features:
optionally, determining an optimal wide beam corresponding to the downlink scanning beam includes: calculating the first signal power of each wide beam received synchronization signal block, and judging whether the first signal power is greater than a preset first signal power threshold value; if so, the wide beam is taken as a preselected wide beam; and acquiring first signal power maximum values corresponding to all the preselected wide beams, and taking the preselected wide beams corresponding to the first signal power maximum values as the optimal wide beams.
Drawings
Fig. 1 is a flow chart illustrating an access method of a multihomed millimeter wave relay system according to an embodiment of the present invention;
fig. 2 is a network architecture diagram of a millimeter wave relay hybrid networking system according to an embodiment of the present invention;
fig. 3 is a frame structure diagram of a millimeter wave relay system according to an embodiment of the present invention;
fig. 4 is a schematic diagram of setting downlink beam scanning time according to an embodiment of the present invention;
fig. 5 is a schematic diagram illustrating a downlink beam scanning time setting according to another embodiment of the present invention;
fig. 6 is a schematic diagram of an uplink beam scanning time setting according to an embodiment of the present invention;
FIG. 7 is a schematic diagram illustrating an uplink beam scanning time setting according to another embodiment of the present invention;
fig. 8 is a schematic structural diagram of a multihomed millimeter wave relay device according to an embodiment of the present invention;
fig. 9 is a block schematic diagram of a multihomed millimeter wave relay system according to an embodiment of the present invention.
Detailed Description
Reference will now be made in detail to embodiments of the present invention, examples of which are illustrated in the accompanying drawings, wherein like or similar reference numerals refer to the same or similar elements or elements having the same or similar function throughout. The embodiments described below with reference to the drawings are illustrative and intended to be illustrative of the invention and are not to be construed as limiting the invention.
In the related art, it is difficult to efficiently use radio waves for ultra-high speed data transmission; according to the multi-host millimeter wave relay system access method provided by the embodiment of the invention, firstly, a base station sends a downlink scanning beam in a downlink beam scanning period, wherein the downlink scanning beam comprises a synchronous signal block; then, the millimeter wave relays in the duration of the downlink scanning beam, a plurality of wide beams used for receiving corresponding synchronization signal blocks are sent at the base station side to determine the optimal wide beam corresponding to the downlink scanning beam, and a corresponding optimal wide beam vector is generated according to the optimal wide beam, so that the optimal wide beams corresponding to different downlink scanning beams can be subsequently determined according to the optimal wide beams; then, the millimeter wave relay selects a corresponding optimal wide beam according to the optimal wide beam vector to receive the downlink scanning beam, amplifies a received synchronous signal block to generate a relay synchronous signal block, and sends the relay synchronous signal block through a user side beam; then, the user equipment receives the synchronization signal block or the relay synchronization signal block, and performs signal quality evaluation on the synchronization signal block or the relay synchronization signal block to judge whether a transmission link corresponding to the synchronization signal block or the relay synchronization signal block meets a communication link requirement, and when the judgment result is yes, adds the transmission link corresponding to the synchronization signal block or the relay synchronization signal block into a candidate link group; then, the user equipment sends the candidate link group to an edge cloud server, so that the edge cloud server can select a millimeter wave communication link of the user equipment according to the candidate link group; the user equipment carries out communication access according to the millimeter wave communication link; therefore, the bandwidth advantage of the millimeter wave wireless communication system is fully exerted, and the ultra-high speed transmission of data through the millimeter wave wireless communication system is realized.
In order to better understand the above technical solutions, exemplary embodiments of the present invention will be described in more detail below with reference to the accompanying drawings. While exemplary embodiments of the invention are shown in the drawings, it should be understood that the invention can be embodied in various forms and should not be limited to the embodiments set forth herein. Rather, these embodiments are provided so that this disclosure will be thorough and complete, and will fully convey the scope of the invention to those skilled in the art.
In order to better understand the technical solution, the technical solution will be described in detail with reference to the drawings and the specific embodiments.
Fig. 1 is a schematic flow diagram of an access method of a multihomed millimeter wave relay system according to an embodiment of the present invention, and as shown in fig. 1, the access method of the multihomed millimeter wave relay system includes the following steps:
s101, a base station sends a downlink scanning beam in a downlink beam scanning period, wherein the downlink scanning beam comprises a synchronous signal block.
That is, the base station sends a downlink scanning beam in a downlink beam scanning period, and the downlink scanning beam may be received by the millimeter wave relay or may be received by the user equipment; wherein the downlink scanning beam comprises a synchronization signal block.
As an example, as shown in fig. 2, fig. 2 is a network architecture diagram of a millimeter wave relay hybrid networking system according to an embodiment of the present invention. The base station (such as node 2 and node 3), the millimeter wave relay (such as node 4 and node 5) and the user equipment (such as node 6, node 7, node 8 and node 9) in each small-range area belong to the same edge cloud, and each edge cloud is controlled and managed by one edge cloud server (such as node 1). The user equipment can be directly accessed to the base station or indirectly accessed to the base station through the millimeter wave relay, and the edge cloud server can perform unified planning on millimeter wave communication links of the user equipment in the cloud and allocate the millimeter wave communication links for the user equipment. The multi-homed millimeter wave relay system may operate in various communication systems, for example, Long Term Evolution (LTE), fifth generation (5G) communication system, sixth generation (6G) communication system, LTE and 5G hybrid architecture, 5G and 6G hybrid architecture, or LTE, 5G, and 6G hybrid architecture.
And S102, the millimeter wave relays within the duration of the downlink scanning beam, and transmits a plurality of wide beams for receiving corresponding synchronous signal blocks at the base station side to determine the optimal wide beam corresponding to the downlink scanning beam, and generates a corresponding optimal wide beam vector according to the optimal wide beam.
That is, the millimeter wave is relayed within the duration of the downlink scanning beam transmitted by the base station (it can be understood that the base station transmits the downlink scanning beam periodically, and the duration of each downlink scanning beam is not changed); transmitting a plurality of wide beams for receiving corresponding synchronous signal blocks at a base station side to determine an optimal wide beam corresponding to the downlink scanning beam, and generating a corresponding optimal wide beam vector according to the optimal wide beam; therefore, the subsequent millimeter wave relay can determine the optimal wide beam corresponding to the downlink scanning beam sent by the current base station according to the stored optimal wide beam vector.
There may be various ways to determine the optimal wide beam corresponding to the downlink scanning beam.
In some embodiments, determining the optimal wide beam corresponding to the downlink scanning beam includes: calculating the first signal power of each wide beam received synchronization signal block, and judging whether the first signal power is greater than a preset first signal power threshold value; if so, the wide beam is taken as a preselected wide beam; and acquiring first signal power maximum values corresponding to all the preselected wide beams, and taking the preselected wide beams corresponding to the first signal power maximum values as the optimal wide beams.
As an example, assume that a downlink beam scanning period of a base station is T, and an actual beam scanning time in one downlink beam scanning period is T0If the number of downlink scanning beams transmitted by the base station in each downlink beam scanning period is n, the duration of each downlink scanning beam is T0N; wherein the remaining (T-T) in one downlink beam scanning period0) The time is a scanning blank window period, and the base station sends downlink scanning beams in the blank window period; and the T of the beam duration is scanned in the current downlink0In the/n time, the millimeter wave relay transmits m wide beams for receiving the synchronization signal block corresponding to the downlink scanning beam at the base station side, wherein the duration of each wide beam at the base station side is T0N/m; further, a first signal power of each wide beam received synchronization signal block may be calculated,judging whether the first signal power is greater than a preset first signal power threshold value; if so, the wide beam is taken as a preselected wide beam; then, after the first signal powers corresponding to all the wide beams are obtained through calculation, the maximum value of the first signal power corresponding to each preselected wide Beam in the preselected beams is obtained, and the preselected wide Beam corresponding to the maximum value is used as the optimal wide Beam _ wides(s is more than or equal to 1 and less than or equal to m); and, the optimal wide beam and the corresponding time stamp of the synchronous signal block are used
Figure BDA0002720401420000071
Generating an optimal wide Beam vector BeamwideJ is; then the optimal wide beam corresponding to the downlink scanning beam can be obtained subsequently according to the vector.
The first signal power may be calculated in various manners.
As an example, the first signal power is calculated according to the following formula:
Figure BDA0002720401420000072
wherein j is more than or equal to 1 and less than or equal to NR,1≤s≤m，1≤i≤NB，1≤k≤n，
Figure BDA0002720401420000073
Represents the equivalent omni-directional radiated power of the downlink scanning beam transmitted by the base station,
Figure BDA0002720401420000074
representing the receive antenna gain of the millimeter wave relay corresponding to the base station-side wide beam,
Figure BDA0002720401420000081
represents the beamforming gain, L, of the millimeter wave relay corresponding to the wide beam at the base station sidetransRepresenting the loss of the signal during transmission,
Figure BDA0002720401420000082
representing the feeder loss, I, of the millimeter wave relay receiving antennamargin_downIndicating the downlink interference margin.
It can be understood that the above operations are repeated until a downlink scanning period of one base station passes, and then the millimeter wave relay completes scanning of the wide beams at all base station sides, and can obtain n optimal wide beam vectors corresponding to downlink scanning beams; and from the n optimal wide beam vectors; the millimeter wave relay may obtain an optimal wide beam corresponding to each downlink scan beam.
And S103, the millimeter wave relay selects a corresponding optimal wide beam according to the optimal wide beam vector to receive the downlink scanning beam, amplifies a received synchronous signal block to generate a relay synchronous signal block, and transmits the relay synchronous signal block through a user side beam.
That is, after the millimeter wave relay finishes scanning the wide beam at the base station side to obtain a complete optimal wide beam vector, when the millimeter wave relay receives the downlink scanning beam sent by the base station, the millimeter wave relay may obtain the corresponding optimal wide beam according to the corresponding optimal wide beam vector; receiving the downlink scanning beam through the optimal wide beam, and amplifying the synchronization signal block after receiving the synchronization signal block to generate a corresponding relay synchronization signal block; next, the relay synchronization signal block is transmitted by the user side beam for reception by the user equipment.
It should be noted that, the selection of the user-side beam of the millimeter wave relay may be various.
As an example, a wide beam without beamforming may be selected, and when such a beam is employed, the millimeter wave relay Rj(1≤j≤NR) The user side antenna adopts an omnidirectional antenna, and sends out the amplified relay synchronization signal block through a wide beam without considering the beam forming function of the user side. The transmission duration of each relay synchronization signal block is T0And/n, namely, the synchronization signal block transmission of the millimeter wave base station is kept synchronous. By adopting the scheme, the user side beamforming function of millimeter wave relay cannot be realized, but the requirement on a user side antenna is lower, and the cost can be reduced。
As another example, a fine beam of all-digital beamforming may be selected, and when such a beam is employed, the millimeter wave relay Rj(1≤j≤NR) The user side antenna adopts a large-scale antenna array or a super-large-scale antenna array, and adopts a full digital beam forming technology, so that a plurality of beams can be simultaneously emitted to carry out multi-target signal transmission. The amplified relay synchronous signal block is simultaneously transmitted out through e fine wave beams, and the duration time of all the e user side fine wave beams is T0And/n, namely the duration of each downlink scanning beam of the millimeter wave base station, is kept synchronous with the sending of the synchronization signal block of the millimeter wave base station. In a period T0Within/n, all the user side fine beam transmission signals are consistent. By adopting the scheme, the user side beamforming function of millimeter wave relay can be realized, but the requirement on the user side antenna of millimeter wave relay is higher, and the cost is higher.
And S104, the user equipment receives the synchronous signal block or the relay synchronous signal block, performs signal quality evaluation on the synchronous signal block or the relay synchronous signal block to judge whether a transmission link corresponding to the synchronous signal block or the relay synchronous signal block meets the requirement of a communication link, and adds the transmission link corresponding to the synchronous signal block or the relay synchronous signal block into a candidate link group when the judgment result is yes.
That is, when the ue receives a synchronization signal block, it may receive the synchronization signal block or it may receive a relay synchronization signal block, and the ue may simultaneously receive one or more synchronization signal blocks or relay synchronization signal blocks, and when the ue receives a synchronization signal block or a relay synchronization signal block, perform signal quality evaluation on each synchronization signal block or each relay synchronization signal block to determine whether a transmission link corresponding to the synchronization signal block or the relay synchronization signal block meets a communication link requirement according to an evaluation result, and if so, add the synchronization signal block or the relay synchronization signal block to a candidate link group.
In some embodiments, performing signal quality evaluation on the synchronization signal block or the relay synchronization signal block to determine whether a transmission link corresponding to the synchronization signal block or the relay synchronization signal block meets the requirement of the communication link includes: calculating the second signal power corresponding to each synchronous signal block or each relay synchronous signal block, and judging whether the second signal power is greater than a preset second signal power threshold value; and if so, considering that the transmission link corresponding to the synchronization signal block or the relay synchronization signal block corresponding to the second signal power threshold meets the requirement of the communication link.
As an example, the second signal power is calculated according to the following formula:
Figure BDA0002720401420000091
wherein j is more than or equal to 1 and less than or equal to NR,1≤s≤l，1≤i≤NB，1≤k≤Nu，1≤v≤n，1≤h≤BeamU，
Figure BDA0002720401420000092
Representing the equivalent omnidirectional radiated power of the downlink scanning beam transmitted by the millimeter wave base station,
Figure BDA0002720401420000093
representing the receive antenna gain of the mm wave relay corresponding to the base station side fine beam,
Figure BDA0002720401420000094
representing the beamforming gain of the mm wave relay corresponding to the base station side fine beam,
Figure BDA0002720401420000095
representing the equivalent omni-directional radiated power of the user-side beam of the millimeter wave relay,
Figure BDA0002720401420000096
indicating the receive antenna gain of the user equipment corresponding to the user receive beam,
Figure BDA0002720401420000097
waves representing user equipment corresponding to user receive beamsBeamforming gain, LtransRepresenting the loss of the signal during transmission, LfeederRepresents the feeder loss of the millimeter wave base station, the millimeter wave relay, the receiving antenna of the user equipment, Imargin_downIndicating the downlink interference margin.
And S105, the user equipment sends the candidate link group to the edge cloud server, so that the edge cloud server selects the millimeter wave communication link of the user equipment according to the candidate link group.
That is to say, after the candidate link group is obtained by screening, the user equipment sends the candidate link group to the edge cloud server, and the edge cloud server selects a millimeter wave communication link finally used for access communication of the user equipment according to the candidate link group.
The edge cloud server may select the millimeter wave communication link of the user equipment according to the candidate link group in various ways.
In some embodiments, the edge cloud server selecting the millimeter wave communication link of the user equipment according to the candidate link group includes: the edge cloud server constructs a multi-domain graph model corresponding to a coverage area, wherein the multi-domain graph model takes a base station, a millimeter wave relay and user equipment as nodes, takes communication links of the base station, the millimeter wave relay and the user equipment as edges, and takes normalized effective link power as a weight; combining the base station nodes and the millimeter wave relay nodes which are connected with each other with edges to generate corresponding bipartite-like models, searching for the amplification paths corresponding to the bipartite-like models according to a Kuhn-Munkras algorithm, and storing the obtained optimal matching components into an optimal matching matrix; and acquiring the non-repeated optimal combination matching in the optimal matching matrix, and taking a communication path corresponding to the non-repeated optimal combination matching as a millimeter wave communication link of the user equipment.
And S106, the user equipment carries out communication access according to the millimeter wave communication link.
In some embodiments, to further provide a communication effect of the user equipment when using the multihomed millimeter wave relay system, after generating the corresponding optimal wide beam vector according to the optimal wide beam, the method further includes:
the millimeter wave relay sends a plurality of fine receiving beams in the coverage range corresponding to each optimal wide beam so as to perform fine receiving beam scanning on the base station side, generates an optimal fine receiving beam corresponding to the optimal wide beam according to the scanning result, and generates an optimal fine receiving beam vector according to the optimal fine receiving beam.
As an example, first, an optimal wide Beam Beam _ widesIs determined; in order to further improve the communication effect; the coverage of the optimal wide beam may be divided (e.g., the coverage is divided equally into l sub-regions, one fine receive beam for each sub-region) to obtain l fine receive beams; then, scanning fine receiving beams on the base station side through the l fine receiving beams to find the optimal fine receiving beam in the fine receiving beams, and generating an optimal fine receiving beam vector according to the optimal fine receiving beam; therefore, when the user equipment is accessed into the multi-host millimeter wave relay system, the optimal fine receiving beam can be used for receiving the beam sent by the base station, so that the communication effect is improved.
It should be noted that after the user equipment completes the random access process, uplink and downlink data transmission can be performed with the millimeter wave base station through the millimeter wave communication link allocated by the edge cloud server, following the frame structure of the multi-homed millimeter wave relay system. In this process, the base station side beam of the millimeter wave relay uses the optimal fine beam. After the communication is finished, the user equipment releases the millimeter wave communication link, and returns the communication resource to the resource pool so as to facilitate the use of other user equipment in the next millimeter wave communication link allocation.
In some embodiments, a multi-homed millimeter wave relay system frame structure is shown in fig. 3. In an alternative method, the system may use 120kHz subcarrier spacing, a 10ms radio frame includes 10 subframes, each subframe is 1ms, one subframe includes 8 slots, and we define the millimeter wave band 1ms subframe as "ddd dddu", where "D" represents Downlink slot (DL) and "U" represents Uplink slot (UL). Each slot is 0.125ms in time, and a slot has 14 orthogonal frequency division multiplexing symbols (OFDM symbols), with the different symbols being orthogonal in time and frequency. The first communication method available for the millimeter wave base station is to adopt a large-scale or super-large-scale antenna and combine with a full digital beam forming technology, so that a plurality of beams can be simultaneously emitted, and communication with a plurality of user equipment in the same time slot is realized; the second available communication method is to adopt a traditional Time Division Duplex (TDD) system, and only one of the millimeter wave relay user equipment or the direct connection user equipment can communicate with the second available communication method at the same time. For the second method, in the millimeter wave band, the communication time of the ue may be accurate to the symbol level, that is, there may be multiple communication processes in one timeslot, so that it may also be implemented to communicate with multiple ues in the same timeslot. For millimeter wave relay, the multi-host millimeter wave relay device has two independent Analog Radio Units (ARUs) and can implement Uplink and Downlink synchronous receiving, amplifying and forwarding of millimeter wave beams, so that a "BH DL (Backhaul Downlink) and an" AC DL (Access Downlink) "link can exist simultaneously, and a" BH UL (Backhaul Uplink ) "link and an" AC UL (Access Uplink) "link can exist simultaneously. The "backhaul link" mentioned here refers to the uplink and downlink millimeter wave communication link between the millimeter wave base station and the millimeter wave relay in a broad sense, and the "access link" refers to the uplink and downlink millimeter wave communication link between the millimeter wave relay and the user equipment in a broad sense. Based on a multi-host millimeter wave relay system frame structure, a millimeter wave base station, a millimeter wave relay, user equipment (direct connection) and the user equipment (relay) all adopt a unified frame structure of 'DDDUDDDU', and a special frame structure specially designed for the millimeter wave relay user equipment is not needed. The frame structure mentioned here is only one of the available frame structures of the multi-homed millimeter wave relay system, and other frame structures of similar design are all within the scope of the present application.
It should be noted here that "D" and "U" in the proposed frame structure "DDDUDDDU" are generalized downlink timeslots and uplink timeslots, and the time duration occupied by the time domain in the time domain may be 14 symbols, that is, 1 timeslot, or the value of symbol may be [1,13], which is different from the communication time duration. Meanwhile, a downlink beam scanning time and an uplink beam scanning time, and a Guard Period (Guard Period) between an uplink slot and a downlink slot should also be considered.
Specifically, as shown in fig. 4 and fig. 5, the downlink beam scanning time may monopolize 1 downlink timeslot, that is, 14 symbols, or may share 1 downlink timeslot with other downlink control or data signals, that is, n e [1,13] symbols occupying 1 downlink timeslot are occupied, and the remaining 14-n symbols may also be used for other downlink signal transmission.
As shown in fig. 6 and fig. 7, the uplink beam scanning time may monopolize 1 uplink timeslot, that is, 14 symbols, or may share 1 uplink timeslot with other uplink control or data signals, that is, only n e [1,13] symbols occupying 1 uplink timeslot, and the remaining 14-n symbols may also be used for other uplink signal transmission.
In order to switch and synchronize the uplink and downlink timeslots of different devices, it is known to those skilled in the art that a guard interval needs to be set during uplink and downlink switching. In some embodiments, the available guard interval setting methods are as follows:
between the downlink timeslot and the uplink timeslot, a guard interval needs to be set to ensure the conversion between downlink communication and uplink communication. The guard interval may monopolize 1 timeslot, that is, 14 symbols, or may only occupy n e [1,13] symbols in 1 timeslot, where the n e [1,13] symbols may belong to an uplink timeslot before the guard interval or a downlink timeslot after the guard interval, and the remaining symbols in the timeslot that can be used for other communications are 14-n symbols.
Between the uplink time slot and the downlink time slot, a guard interval needs to be set to ensure the conversion between the uplink communication and the downlink communication. The guard interval may monopolize 1 timeslot, that is, 14 symbols, or may only occupy n e [1,13] symbols in 1 timeslot, where the n e [1,13] symbols may belong to a downlink timeslot before the guard interval or an uplink timeslot after the guard interval, and the remaining symbols of the timeslot that can be used for other communications are 14-n symbols.
In some embodiments, fig. 8 is a schematic structural diagram of a multi-homed millimeter wave relay device according to an embodiment of the present invention, as shown in fig. 8, the device mainly includes the following components and functions:
the antenna comprises a large-scale antenna group, a large-scale antenna group and a large-scale antenna group, wherein the large-scale antenna group is divided into a large-scale antenna group 1 and a large-scale antenna group 2, and only one receiving and one sending can be carried out at the same time, namely the large-scale antenna group 1 receives signals and the large-scale antenna group 2 sends signals; or the large-scale antenna group 2 receives signals and the large-scale antenna group 1 transmits signals. The number of sectors and the size of the antenna array for the large-scale antenna group can be set according to actual engineering requirements.
The two sets of reverse and independent amplifying circuits are isolated by the two duplex filters, so that amplified signals are prevented from reentering the amplifying circuits to generate system signals to be self-excited, and only 1 amplifying circuit is ensured to be in a working state at the same time. When the large-scale antenna group 1 receives signals and the large-scale antenna group 2 sends signals, the amplifying circuit 1 is in a working state; when the large-scale antenna group 2 receives a signal and the large-scale antenna group 1 transmits a signal, the amplifying circuit 2 is in a working state. The low noise amplifier, the frequency selection filter and the power amplifier in the amplifying circuit are used for realizing the functions of noise reduction and power amplification of signals.
And the monitoring module has a control function and can monitor the working condition of each component of the device. Meanwhile, the monitoring module comprises an accurate clock, the time of the generation of the selected wide beam and the fine beam needs to be recorded in the searching process of the optimal wide beam and the optimal fine beam at the millimeter wave relay base station side, and the specified beam can be generated on time according to the system period and the self-timing cycle. The timestamp and the corresponding beam configuration parameter recorded by the precise clock are stored in the storage unit of the monitoring module.
In summary, according to the access method of the multi-homed millimeter wave relay system in the embodiment of the present invention, first, a base station transmits a downlink scanning beam in a downlink beam scanning period, where the downlink scanning beam includes a synchronization signal block; then, the millimeter wave relay transmits a plurality of wide beams for receiving corresponding synchronous signal blocks at the base station side within the duration of the downlink scanning beam to determine an optimal wide beam corresponding to the downlink scanning beam, and generates a corresponding optimal wide beam vector according to the optimal wide beam, so that the optimal wide beams corresponding to different downlink scanning beams can be subsequently determined according to the optimal wide beams; then, the millimeter wave relay selects a corresponding optimal wide beam according to the optimal wide beam vector to receive the downlink scanning beam, amplifies a received synchronous signal block to generate a relay synchronous signal block, and sends the relay synchronous signal block through a user side beam; then, the user equipment receives the synchronization signal block or the relay synchronization signal block, and performs signal quality evaluation on the synchronization signal block or the relay synchronization signal block to judge whether a transmission link corresponding to the synchronization signal block or the relay synchronization signal block meets a communication link requirement, and when the judgment result is yes, adds the transmission link corresponding to the synchronization signal block or the relay synchronization signal block into a candidate link group; then, the user equipment sends the candidate link group to an edge cloud server, so that the edge cloud server can select a millimeter wave communication link of the user equipment according to the candidate link group; the user equipment carries out communication access according to the millimeter wave communication link; therefore, the bandwidth advantage of the millimeter wave wireless communication system is fully exerted, and the ultra-high speed transmission of data through the millimeter wave wireless communication system is realized.
In order to implement the foregoing embodiments, an embodiment of the present invention provides a computer-readable storage medium, on which a multi-homed millimeter wave relay system access program is stored, where the multi-homed millimeter wave relay system access program, when executed by a processor, implements the multi-homed millimeter wave relay system access method as described above.
According to the computer readable storage medium of the embodiment of the invention, the access program of the multi-homed millimeter wave relay system is stored, so that when the processor executes the access program of the multi-homed millimeter wave relay system, the access method of the multi-homed millimeter wave relay system is realized, the bandwidth advantage of a millimeter wave wireless communication system is fully exerted, and the ultra-high speed transmission of data through the millimeter wave wireless communication system is realized.
In order to implement the foregoing embodiments, an embodiment of the present invention provides a multihomed millimeter wave relay system, as shown in fig. 9, where the multihomed millimeter wave relay system includes: a base station 10, a millimeter wave relay 20, a user equipment 30, and an edge cloud server 40;
the base station 10 is configured to send a downlink scanning beam in a downlink beam scanning period, where the downlink scanning beam includes a synchronization signal block;
the millimeter wave relay 20 is configured to transmit a plurality of wide beams for receiving corresponding synchronization signal blocks on the base station side within the duration of the downlink scanning beam, to determine an optimal wide beam corresponding to the downlink scanning beam, and generate a corresponding optimal wide beam vector according to the optimal wide beam;
the millimeter wave relay 20 is further configured to select a corresponding optimal wide beam according to the optimal wide beam vector to receive the downlink scanning beam, amplify the received synchronization signal block to generate a relay synchronization signal block, and transmit the relay synchronization signal block through the user-side beam;
the user equipment 30 is configured to receive the synchronization signal block or the relay synchronization signal block, perform signal quality evaluation on the synchronization signal block or the relay synchronization signal block, determine whether a transmission link corresponding to the synchronization signal block or the relay synchronization signal block meets a communication link requirement, and add the transmission link corresponding to the synchronization signal block or the relay synchronization signal block into the candidate link group when the determination result is yes;
the edge cloud server 40 is configured to obtain a candidate link group sent by the user equipment 30, select a millimeter wave communication link of the user equipment 30 according to the candidate link group, and send the millimeter wave communication link to the user equipment 30, so that the user equipment 30 performs communication access according to the millimeter wave communication link.
In some embodiments, determining the optimal wide beam corresponding to the downlink scanning beam includes: calculating the first signal power of each wide beam received synchronization signal block, and judging whether the first signal power is greater than a preset first signal power threshold value; if so, taking the wide beam as a pre-selected wide beam; and acquiring first signal power maximum values corresponding to all the preselected wide beams, and taking the preselected wide beams corresponding to the first signal power maximum values as the optimal wide beams.
It should be noted that the above access method related to the multi-homed millimeter wave relay system in fig. 1 is also applicable to the multi-homed millimeter wave relay system, and is not described herein again.
To sum up, the multi-homed millimeter wave relay system according to the embodiment of the present invention; the base station is configured to transmit a downlink scanning beam in a downlink beam scanning period, wherein the downlink scanning beam comprises a synchronization signal block; the millimeter wave relay is used for sending a plurality of wide beams for receiving corresponding synchronous signal blocks at the base station side within the duration time of the downlink scanning beam so as to determine the optimal wide beam corresponding to the downlink scanning beam and generate a corresponding optimal wide beam vector according to the optimal wide beam; the millimeter wave relay is also used for selecting a corresponding optimal wide beam according to the optimal wide beam vector to receive the downlink scanning beam, amplifying a received synchronous signal block to generate a relay synchronous signal block and sending the relay synchronous signal block through a user side beam; the user equipment is used for receiving the synchronous signal block or the relay synchronous signal block, evaluating the signal quality of the synchronous signal block or the relay synchronous signal block to judge whether a transmission link corresponding to the synchronous signal block or the relay synchronous signal block meets the requirement of a communication link, and adding the transmission link corresponding to the synchronous signal block or the relay synchronous signal block into a candidate link group when the judgment result is yes; the edge cloud server is used for acquiring a candidate link group sent by user equipment, selecting a millimeter wave communication link of the user equipment according to the candidate link group, and sending the millimeter wave communication link to the user equipment so that the user equipment can carry out communication access according to the millimeter wave communication link; therefore, the bandwidth advantage of the millimeter wave wireless communication system is fully exerted, and the ultra-high speed transmission of data through the millimeter wave wireless communication system is realized.
As will be appreciated by one skilled in the art, embodiments of the present invention may be provided as a method, system, or computer program product. Accordingly, the present invention may take the form of an entirely hardware embodiment, an entirely software embodiment or an embodiment combining software and hardware aspects. Furthermore, the present invention 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 invention is described with reference to flowchart illustrations and/or block diagrams of methods, apparatus (systems), and computer program products according to embodiments of the invention. 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.
It should be noted that in the claims, any reference signs placed between parentheses shall not be construed as limiting the claim. The word "comprising" does not exclude the presence of elements or steps not listed in a claim. The word "a" or "an" preceding an element does not exclude the presence of a plurality of such elements. The invention may be implemented by means of hardware comprising several distinct elements, and by means of a suitably programmed computer. In the unit claims enumerating several means, several of these means may be embodied by one and the same item of hardware. The usage of the words first, second and third, etcetera do not indicate any ordering. These words may be interpreted as names.
While preferred embodiments of the present invention have been described, additional variations and modifications in those embodiments may occur to those skilled in the art once they learn of the basic inventive concepts. Therefore, it is intended that the appended claims be interpreted as including preferred embodiments and all such alterations and modifications as fall within the scope of the invention.
It will be apparent to those skilled in the art that various changes and modifications may be made in the present invention without departing from the spirit and scope of the invention. Thus, if such modifications and variations of the present invention fall within the scope of the claims of the present invention and their equivalents, the present invention is also intended to include such modifications and variations.
In the description of the present invention, it is to be understood that the terms "first", "second" and the like are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or implying any number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of the present invention, "a plurality" means two or more unless specifically defined otherwise.
In the present invention, unless otherwise expressly stated or limited, the terms "mounted," "connected," "secured," and the like are to be construed broadly and can, for example, be fixedly connected, detachably connected, or integrally formed; can be mechanically or electrically connected; either directly or indirectly through intervening media, either internally or in any other relationship. The specific meanings of the above terms in the present invention can be understood by those skilled in the art according to specific situations.
In the present invention, unless otherwise expressly stated or limited, the first feature "on" or "under" the second feature may be directly contacting the first and second features or indirectly contacting the first and second features through an intermediate. Also, a first feature "on," "over," and "above" a second feature may be directly or diagonally above the second feature, or may simply indicate that the first feature is at a higher level than the second feature. A first feature being "under," "below," and "beneath" a second feature may be directly under or obliquely under the first feature, or may simply mean that the first feature is at a lesser elevation than the second feature.
In the description herein, references to the description of the term "one embodiment," "some embodiments," "an example," "a specific example," or "some examples," etc., mean that a particular feature, structure, material, or characteristic described in connection with the embodiment or example is included in at least one embodiment or example of the invention. In this specification, the schematic representations of the terms used above should not be understood to necessarily refer to the same embodiment or example. Furthermore, the particular features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples. Furthermore, various embodiments or examples and features of different embodiments or examples described in this specification can be combined and combined by one skilled in the art without contradiction.
Although embodiments of the present invention have been shown and described above, it is understood that the above embodiments are exemplary and should not be construed as limiting the present invention, and that variations, modifications, substitutions and alterations can be made to the above embodiments by those of ordinary skill in the art within the scope of the present invention.

Claims (7)

1. A multi-homing millimeter wave relay system access method is characterized by comprising the following steps:
a base station sends a downlink scanning beam in a downlink beam scanning period, wherein the downlink scanning beam comprises a synchronous signal block;
the millimeter wave relay transmits a plurality of wide beams for receiving corresponding synchronous signal blocks at the base station side within the duration of the downlink scanning beam to determine an optimal wide beam corresponding to the downlink scanning beam, and generates a corresponding optimal wide beam vector according to the optimal wide beam;
the millimeter wave relay selects a corresponding optimal wide beam according to the optimal wide beam vector to receive the downlink scanning beam, amplifies a received synchronous signal block to generate a relay synchronous signal block, and sends the relay synchronous signal block through a user side beam;
the user equipment receives the synchronous signal block or the relay synchronous signal block, performs signal quality evaluation on the synchronous signal block or the relay synchronous signal block to judge whether a transmission link corresponding to the synchronous signal block or the relay synchronous signal block meets the requirement of a communication link, and adds the transmission link corresponding to the synchronous signal block or the relay synchronous signal block into a candidate link group when the judgment result is yes;
the user equipment sends the candidate link group to an edge cloud server so that the edge cloud server can select a millimeter wave communication link of the user equipment according to the candidate link group;
the user equipment carries out communication access according to the millimeter wave communication link;
determining an optimal wide beam corresponding to the downlink scanning beam includes:
calculating the first signal power of each wide beam received synchronization signal block, and judging whether the first signal power is greater than a preset first signal power threshold value;
if so, the wide beam is taken as a preselected wide beam;
acquiring first signal power maximum values corresponding to all the preselected wide beams, and taking the preselected wide beams corresponding to the first signal power maximum values as optimal wide beams;
the first signal power is calculated according to the following formula:
Figure FDA0003573433450000011
wherein j is more than or equal to 1 and less than or equal to NR,1≤s≤m，1≤i≤NB，1≤k≤n，
Figure FDA0003573433450000012
Represents the equivalent omni-directional radiated power of the downlink scanning beam transmitted by the base station,
Figure FDA0003573433450000013
representing the reception antenna gain of the millimeter wave relay corresponding to the base station side wide beam,
Figure FDA0003573433450000014
represents the beamforming gain, L, of the millimeter wave relay corresponding to the wide beam at the base station sidetransRepresenting the loss of the signal during transmission,
Figure FDA0003573433450000015
representing the feeder loss, I, of the millimeter wave relay receiving antennamargin_downIndicating the downlink interference margin.
2. The multi-homed millimeter wave relay system access method of claim 1, wherein evaluating the signal quality of the synchronization signal block or the relay synchronization signal block to determine whether a transmission link corresponding to the synchronization signal block or the relay synchronization signal block meets a communication link requirement comprises:
calculating a second signal power corresponding to each synchronization signal block or each relay synchronization signal block, and judging whether the second signal power is greater than a preset second signal power threshold value;
and if so, considering that the transmission link corresponding to the synchronization signal block or the relay synchronization signal block corresponding to the second signal power threshold meets the requirement of the communication link.
3. The multi-homed millimeter wave relay system access method of claim 2, wherein said second signal power is calculated according to the following formula:
Figure FDA0003573433450000021
wherein j is more than or equal to 1 and less than or equal to NR,1≤s≤l，1≤i≤NB，1≤k≤Nu，1≤v≤n，1≤h≤BeamU，
Figure FDA0003573433450000022
Representing the equivalent omnidirectional radiated power of the downlink scanning beam transmitted by the millimeter wave base station,
Figure FDA0003573433450000023
representing the receive antenna gain of the mm wave relay corresponding to the base station side fine beam,
Figure FDA0003573433450000024
indicating the beamforming gain of the mm wave relay corresponding to the base station side fine beam,
Figure FDA0003573433450000025
representing the equivalent omni-directional radiated power of the user side beam of the millimeter wave relay,
Figure FDA0003573433450000026
indicating the receive antenna gain of the user equipment corresponding to the user receive beam,
Figure FDA0003573433450000027
representing the beamforming gain, L, of the user equipment corresponding to the user's receive beamtransRepresenting the loss of the signal during transmission, LfeederRepresents the feeder loss of the millimeter wave base station, the millimeter wave relay and the receiving antenna of the user equipment, Imargin_downIndicating the downlink interference margin.
4. The multi-homed millimeter wave relay system access method of any of claims 1 to 3, wherein an edge cloud server selecting a millimeter wave communication link of a user device according to the candidate link group, comprises:
the edge cloud server constructs a multi-domain graph model corresponding to a coverage area, wherein the multi-domain graph model takes the base station, the millimeter wave relay and the user equipment as nodes, takes communication links of the base station, the millimeter wave relay and the user equipment as edges, and takes normalized effective link power as a weight;
combining the base station nodes and the millimeter wave relay nodes which are connected with each other with edges to generate corresponding bipartite-like models, searching for the amplification paths corresponding to the bipartite-like models according to a Kuhn-Munkras algorithm, and storing the obtained optimal matching components into an optimal matching matrix;
and acquiring the non-repeated optimal combination matching in the optimal matching matrix, and taking a communication path corresponding to the non-repeated optimal combination matching as a millimeter wave communication link of the user equipment.
5. The multi-homed millimeter wave relay system access method of any of claims 1 to 3, further comprising, after generating a corresponding optimal wide beam vector from the optimal wide beam:
the millimeter wave relay sends a plurality of fine receiving beams in a coverage range corresponding to each optimal wide beam so as to perform fine receiving beam scanning on the base station side, generates an optimal fine receiving beam corresponding to the optimal wide beam according to a scanning result, and generates an optimal fine receiving beam vector according to the optimal fine receiving beam.
6. A computer-readable storage medium having stored thereon a multi-homed millimeter wave relay system access program that, when executed by a processor, implements the multi-homed millimeter wave relay system access method of any of claims 1-5.
7. A multi-homed millimeter wave relay system, comprising: the system comprises a base station, a millimeter wave relay, user equipment and an edge cloud server;
the base station is configured to send a downlink scanning beam in a downlink beam scanning period, where the downlink scanning beam includes a synchronization signal block;
the millimeter wave relay is used for sending a plurality of wide beams used for receiving corresponding synchronous signal blocks at the base station side within the duration time of the downlink scanning beam so as to determine the optimal wide beam corresponding to the downlink scanning beam and generate the corresponding optimal wide beam vector according to the optimal wide beam;
the millimeter wave relay is also used for selecting a corresponding optimal wide beam according to the optimal wide beam vector to receive the downlink scanning beam, amplifying a received synchronous signal block to generate a relay synchronous signal block and sending the relay synchronous signal block through a user side beam;
the user equipment is used for receiving the synchronous signal block or the relay synchronous signal block, evaluating the signal quality of the synchronous signal block or the relay synchronous signal block to judge whether a transmission link corresponding to the synchronous signal block or the relay synchronous signal block meets the requirement of a communication link, and adding the transmission link corresponding to the synchronous signal block or the relay synchronous signal block into a candidate link group when the judgment result is yes;
the edge cloud server is used for acquiring a candidate link group sent by user equipment, selecting a millimeter wave communication link of the user equipment according to the candidate link group, and sending the millimeter wave communication link to the user equipment so that the user equipment can carry out communication access according to the millimeter wave communication link;
determining an optimal wide beam corresponding to the downlink scanning beam includes:
calculating the first signal power of each wide beam received synchronization signal block, and judging whether the first signal power is greater than a preset first signal power threshold value;
if so, the wide beam is taken as a preselected wide beam;
acquiring first signal power maximum values corresponding to all the preselected wide beams, and taking the preselected wide beams corresponding to the first signal power maximum values as optimal wide beams;
the first signal power is calculated according to the following formula:
Figure FDA0003573433450000041
wherein j is more than or equal to 1 and less than or equal to NR,1≤s≤m，1≤i≤NB，1≤k≤n，
Figure FDA0003573433450000042
Represents the equivalent omni-directional radiated power of the downlink scanning beam transmitted by the base station,
Figure FDA0003573433450000043
representing the reception antenna gain of the millimeter wave relay corresponding to the base station side wide beam,
Figure FDA0003573433450000044
represents the beamforming gain, L, of the millimeter wave relay corresponding to the wide beam at the base station sidetransRepresenting the loss of the signal during transmission,
Figure FDA0003573433450000045
representing the feeder loss, I, of the millimeter wave relay receiving antennamargin_downIndicating the downlink interference margin.
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