WO2020020319A1

WO2020020319A1 - Cell networking structure developed in 5g network

Info

Publication number: WO2020020319A1
Application number: PCT/CN2019/097812
Authority: WO
Inventors: 朱睿; 徐强; 刘耀中; 方有纲; 李跃星
Original assignee: 湖南时变通讯科技有限公司
Priority date: 2018-07-27
Filing date: 2019-07-26
Publication date: 2020-01-30
Also published as: CN108880638A

Abstract

The present application provides a cell networking structure developed in a 5G network, comprising a core network, a 5G millimeter wave base station, an M4R base station, and a MIMO network; the core network being connected to the 5G millimeter wave base station by means of millimeter waves or optical fibers; the 5G millimeter wave base station being connected to the M4R base station by means of millimeter wave links; the M4R base station being used for processing a network signal sent by the 5G millimeter wave base station to enable the network signal to conform to a MIMO transmission protocol, and sending the processed network signal to the MIMO network. The present application develops a 5G network, and connects the 5G millimeter wave base station to the MIMO network by means of the M4R base station, so that the 5G network can be used in cells and indoors by means of advantages of MIMO, providing indoor users with a high speed internet access experience, constructing 5G wireless communication cells capable of covering indoor users.

Description

Description Invention Name: A Cell Networking Structure Extending to 5G Networks Technical Field

[0001] The present invention relates to the technical field of 5G networking, and in particular, to a cell networking structure extended to a 5G network.

Background technique

[0002] Millimeter-wave communication is one of the key technologies of 5G. Its ultra-wide bandwidth can provide communication rates supporting up to tens of GbpS, but it also has the disadvantage of large transmission attenuation and poor penetration. Therefore, it can only be used for point-to-point transmission, such as base station backhaul. For wireless communication users, the main traffic occurs indoors. The obstruction of the walls prevents outdoor base stations from directly communicating with users, and prevents users from directly enjoying the high speed brought by the millimeter wave broadband. However, the current way for outdoor signals to access indoors depends on wired connections, that is, outdoor signals are introduced into the room through optical fibers or Ethernet cables, and then passed to users. As a result, the overall cost and difficulty of deployment will greatly increase. Although the low-frequency band has strong wall penetration capabilities, the spectrum resources are very crowded, and the rate of a single link is insufficient to meet the 5G requirements. A technology that can provide high data throughput in low frequency bands is Massive MIMO. This technology relies on large-scale antenna arrays and beamforming, which is very expensive to implement. At the same time, the size of the antenna has increased significantly, and the difficulty of deployment has also increased.

[0003] The key to solving the above problem lies in seeking a reliable, low-cost technology for constructing a 5G wireless communication cell that can cover indoor users.

technical problem

[0004] Type a technical problem description paragraph here.

Problem solution

Technical solutions

[0005] The present invention provides a cell networking structure that is extended to a 5G network, and is used to construct a 5G wireless communication cell that can cover indoor users.

[0006] A cell networking structure extended to a 5G network provided in this application includes: a core network, a 5G millimeter wave base station, an M4R base station, and a MIMO network;

[0007] The core network and the 5G millimeter wave base station are connected by a millimeter wave or an optical fiber; [0008] 5G millimeter wave base stations and M4R base stations are connected through millimeter wave links;

[0009] The M4R base station is configured to process a network signal sent by a 5G millimeter wave base station, so that the network signal conforms to M

IMO transmission protocol, and send the processed network signal to MIMO network;

[0010] An M4R networking unit includes three main parts: an M4R base station, a relay node, and an indoor terminal; first,

The M4R base station subdivides the wideband millimeter wave spectrum into narrower bandwidth subchannels; the frequency bandwidth of each subchannel is consistent with the frequency bandwidth of the Sub 6GHz band used by the system, and does not overlap in the frequency domain, forming a set of parallel signals The sub-channel communicates with the distributed relay node via the millimeter-wave channel of the M4R millimeter-wave base station; the relay node is placed outdoors and forms a LOS channel with the millimeter-wave base station; each sub-channel corresponds to one The relay node converts the millimeter-wave subchannel to a uniform carrier frequency in the Sub 6GHz band by the relay node; after amplification by the relay node, the signal of each subchannel communicates with the indoor terminal in the form of MIMO; and the indoor terminal The signal is received and processed in the form of MIMO.

[0011] Preferably, the MIMO network includes a relay node and an indoor terminal;

[0012] The relay node receives the network signal sent by the M4R base station and performs frequency conversion on the network signal to obtain a signal in a low frequency band, and transmits the signal in the low frequency band to the indoor terminal.

[0013] Preferably, the M4R base station includes: a modem, n millimeter wave transceivers, a channel controller, a separate combiner, and m antennas, n is greater than or equal to 1 and m is greater than or equal to 1;

[0014] The modem is connected to a 5G millimeter wave base station, the modem is also connected to n millimeter wave transceivers, and the n millimeter wave transceivers are connected to m antennas through a split combiner;

[0015] The channel controller is connected to n millimeter wave transceivers, and is used to calculate a channel response and send the millimeter wave local oscillator frequency to the n millimeter wave transceivers.

[0016] Preferably, the modem is configured to modulate the baseband signal transmitted by the 5G millimeter wave base station according to the propagation requirements of the MIMO link to obtain a network signal conforming to the MIMO transmission protocol.

[0017] Preferably, the modem is further configured to convert the baseband signal into n parallel channels through time-space coding, one channel corresponding to one millimeter wave transceiver.

[0018] Preferably, the channel controller is configured to allocate corresponding millimeter wave local oscillator frequencies to the n millimeter wave transceivers and send the millimeter wave local oscillator frequencies to the n millimeter wave transceivers.

[0019] Preferably, the relay node is implemented by an analog circuit, the analog circuit includes: a millimeter wave antenna, a millimeter wave duplexer, a first mixer, a second mixer, a frequency allocation control unit, a low frequency duplexer, Low frequency antenna [0020] The millimeter-wave signal of the millimeter-wave base station received by the millimeter-wave antenna is transmitted to the low-frequency antenna and transmitted to the indoor terminal via the millimeter-wave duplexer, the first mixer, and the low-frequency duplexer, and the millimeter-wave signal is transmitted to the indoor mixer. Down-convert to the low-frequency carrier frequency band with the first carrier frequency of the frequency allocation control unit;

[0021] The signal of the low-frequency carrier frequency band of the indoor terminal received by the low-frequency antenna is transmitted to the millimeter-wave antenna and transmitted to the millimeter-wave base station through the low-frequency duplexer, the second mixer, and the millimeter-wave duplexer. The second mixer and the second carrier frequency of the frequency allocation control unit are up-converted to the millimeter wave carrier frequency band.

[0022] Preferably, the M4R base station and the MIMO network also communicate through a virtual MIMO channel, and the virtual MI MO channel includes a millimeter wave band and a low frequency band.

[0023] Preferably, the uplink and downlink of the M4R base station and the MIMO network adopt a MIMO transmission mode or a time-division and frequency-division multi-user access mode.

[0024] Preferably, the MIMO network of the neighboring cell uses different millimeter wave subchannels and different low frequency bands.

Beneficial effect

[0025] As can be seen from the above technical solutions, the present invention has the following advantages:

[0026] A cell network structure extended to a 5G network provided by this application includes: a core network, a 5G millimeter wave base station, an M4R base station, and a MIMO network; the core network and the 5G millimeter wave base station are connected by a millimeter wave or an optical fiber; The millimeter wave base station and the M4R base station are connected through a millimeter wave link; the M4R base station is used to process the network signal sent by the 5G millimeter wave base station, so that the network signal conforms to the MIMO transmission protocol, and sends the processed network signal to the MIMO network. This application expands on the 5G network, and connects the 5G millimeter-wave base station and the MIMO network through the M4R base station, so that the 5G network can enter the cell and the room through the advantages of MIMO, providing indoor users with a high-speed Internet experience, and achieving an indoor coverage Construction of 5G wireless communication cells for users.

Brief description of the drawings

BRIEF DESCRIPTION OF THE DRAWINGS

[0027] In order to explain the embodiments of the present invention more clearly, the accompanying drawings used in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the accompanying drawings in the following description are only some of the present invention. For those of ordinary skill in the art, embodiments may obtain other drawings according to the drawings without paying creative labor.

1 is a schematic diagram of an embodiment of a cell networking structure extended to a 5G network provided in this application;

[0029] FIG. 2 is a schematic diagram for explaining the principle of M4R in an embodiment of the present application;

[0030] FIG. 3 is a schematic diagram illustrating the extension of an M4R millimeter wave base station to a 5G network in an embodiment of the present application;

4 is an architecture diagram of an M4R base station according to an embodiment of the present application;

5 is a circuit diagram of a relay node in an embodiment of the present application.

The best embodiment for carrying out the invention

Best Mode of the Invention

[0033] The description of the preferred embodiment of the invention is entered here.

Invention Examples

Embodiments of the invention

[0034] The present invention provides a cell networking structure extended to a 5G network, and is used to construct a 5G wireless communication cell that can cover indoor users.

[0035] In order to make the objectives, features, and advantages of the present invention more obvious and understandable, the technical solutions in the embodiments of the present invention will be clearly and completely described in combination with the accompanying drawings in the embodiments of the present invention. The embodiments described below are only a part of the embodiments of the present invention, but not all the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by a person of ordinary skill in the art without creative efforts shall fall within the protection scope of the present invention.

[0036] Referring to FIG. 1, an embodiment of a cell networking structure extended to a 5G network provided in this application includes: a core network, a 5G millimeter wave base station, an M4R base station, and a MIMO network;

[0037] The core network is connected to the 5G millimeter wave base station through millimeter wave or optical fiber;

[0038] The 5G millimeter wave base station and the M4R base station are connected through a millimeter wave link;

[0039] The M4R base station is configured to process the network signal sent by the 5G millimeter wave base station, so that the network signal conforms to the M IMO transmission protocol, and sends the processed network signal to the MIMO network.

[0040] Further, the MIMO network includes a relay node and an indoor terminal;

[0041] The relay node receives the network signal sent by the M4R base station and performs frequency conversion on the network signal to obtain a low frequency wave And transmit the signals in the low frequency band to the indoor terminal.

[0042] This application is developed on a 5G network. The 5G millimeter-wave base station and the MIMO network are connected through an M4R base station, so that the 5G network can enter the cell and indoor through the advantages of MIMO, and provide high-speed Internet access experience for indoor users. Construction of 5G wireless communication cells that can cover indoor users. As a low-cost, scalable, high-speed wireless communication solution, the M4R system can be embedded in 5G deployments, making up for the shortcomings of poor millimeter wave wall penetration and narrow bandwidth at low frequencies. When constructing a 5G cell, M4R can be extended on the existing 5G link. By building a local system to increase the coverage of 5G, it can be used as the basic structure at the end of the 5G network.

[0043] The basic principles of this application will be explained below:

[0044] Millimeter to Microwave MIMO Relay Technology

Relay (M4R) converts frequency multiplexing on millimeter waves to spatial submultiplexing of Sub 6GHz by means of frequency conversion relay, and constructs a high-speed wireless communication network in a Multiple Input Multiple Output (MIMO) manner. This technology can build a low-cost residential wireless network, allowing indoor users to access the core network through a high-speed millimeter-wave network in a completely wireless manner.

[0045] The M4R technology has good compatibility at the same time, and can be applied to multiple levels of a wireless communication network. This patent proposes to embed the M4R system into a 5G network and construct a cell as a sub-network at the end of the network.

[0046] The basic principle of M4R is to connect a millimeter wave channel and a Sub 6GHz MIMO channel through a frequency conversion relay. An M4R networking unit includes three main parts: M4R millimeter wave base station, relay node, and indoor terminal (combined with Figure 1, Figure 2, and the context, it can be known that the millimeter wave base station in M4R and the M4R base station described in this article belong to the same Content, and it is clearly recorded in the following that M4R base station is an abbreviation of M4R millimeter wave base station, therefore, in this article, millimeter wave base station, M4R millimeter wave base station, and M4R base station all refer to unified content). First, the millimeter-wave base station subdivides the broadband millimeter-wave spectrum into narrower-bandwidth subchannels. The frequency bandwidth of each subchannel is consistent with the frequency bandwidth of the Sub 6GHz band used by the system, and does not overlap in the frequency domain, forming a set of parallel signal paths. These sub-channels communicate with the distributed relay nodes via the millimeter-wave channels of the base station. The relay node is placed outdoors, and forms a LOS (Line of Sight) channel with the millimeter wave base station. Each sub-channel corresponds to a relay node, and the millimeter-wave sub-channel is converted by the relay node to a uniform carrier frequency in the Sub 6 GHz band. Through the amplification of the relay node, each child The signal of the channel communicates with the indoor terminal in the form of MIMO. The indoor terminal receives and processes signals in the form of MIMO. The whole system is equivalent to establishing a MIMO link from a millimeter wave base station to an indoor terminal. Its basic principle is shown in Figure 2.

[0047] As a low-cost, scalable and high-speed wireless communication solution, the M4R system can be embedded in 5G deployments to make up for the shortcomings of poor millimeter wave wall penetration and narrow bandwidth at low frequencies. When constructing a 5G cell, M4R can be extended on the existing 5G link. By building a local system to increase the coverage of 5G, it can be used as the basic structure at the end of the 5G network.

[0048] It can be known from the foregoing principles that the present application actually constructs the M4R system on any proposed or established 5G network.

[0049] Referring to FIG. 1, the M4R system is used to construct a cell sub-network. Here the application of M4R system is explained by the downlink signal transmission sequence. First, the data center is connected to the 5G millimeter-wave base station through millimeter-wave or optical fiber. Then the millimeter wave base station and the millimeter wave access point of the M4R subsystem are connected by a millimeter wave link. At this time, the signal has entered the M4R network. The millimeter-wave access point processes network signals, provides an interface from the network layer to the physical layer, and performs operations such as encoding and modulation on signals to be transmitted according to the M4R principle to meet the MIMO transmission protocol. According to the M4R principle, the millimeter wave access point transmission communicates with the relay nodes in the cell, and the relay node transmits the signal to the indoor users in the low frequency band through the frequency conversion relay.

[0050] In the uplink, the signal transmission direction is opposite. The indoor user's signal first passes through a MIMO channel composed of relay nodes, and each relay node converts the signal to the millimeter wave band according to the corresponding subchannel frequency, and then transmits it back to the M4R millimeter wave base station. The millimeter wave signal is then demodulated, restored to a baseband signal, and transmitted back to the 5G backbone network.

[0051] The M4R millimeter wave base station (M4R base station for short) will be described in detail below.

[0052] Referring to FIG. 3, a millimeter wave base station in an M4R system, referred to as an M4R base station for short, has a basic function of providing an entrance to a cell network and a backbone network. In the 5G solution, the millimeter wave technology is applied to the base station for backhaul, and the M4R base station is based on this to expand the network. The M4R base station communicates with the 5G millimeter wave base station to form a millimeter wave backhaul link. After receiving the data from the millimeter-wave base station, the M4R base station converts it into a signal transmitted in the M4 R network and transmits it on its sub-network. In practice, the M4R base station plays the role of a protocol conversion interface. [0053] It should be noted that in actual network deployment, the millimeter wave base station can also directly provide the interface role of the M4R subnetwork. Considering the expansibility of the network, the 5G millimeter-wave system that has been deployed can realize the function of millimeter-wave bandwidth home access by assuming M4R cells. The main functions of the M4R base station are as follows:

[0054] (a) Communicate with a 5G millimeter wave base station, and at the same time, as an interface for protocol conversion, switch the data transmission mode between the 5G millimeter wave and the M4R system.

(B) providing an interface from the network layer to the physical layer

[0056] (c) In the millimeter wave base station communication, the M4R signal needs to parse the baseband signal; for the downlink, it organizes different user data, packs them into frames, and confirms the transmission priority. Precoding the signal according to the propagation requirements of the MIMO link. For the uplink, the M4R base station demodulates the data in the MIMO link and regenerates signals that meet the 5G millimeter wave transmission protocol.

[0057] (d) In the communication of indoor users, it is necessary to cooperate with the terminal to complete MIMO channel estimation, and dynamically optimize the signal transmission method, such as reasonably assigning a relay node corresponding to a subchannel, and allocating a subchannel carrier frequency and bandwidth. Allocate the number of parallel data streams according to the conditions of the indoor terminal, optimize the rate, or improve the signal-to-noise ratio.

[0058] Please refer to FIG. 4, the M4R base station includes: a modem, n millimeter wave transceivers, a channel controller, a splitter combiner, and m antennas, n is greater than or equal to 1 and m is greater than or equal to 1;

[0059] The modem is connected to a 5G millimeter wave base station, the modem is also connected to n millimeter wave transceivers, and the n millimeter wave transceivers are connected to m antennas through a split combiner;

[0060] The channel controller is connected to n millimeter wave transceivers, and is used to calculate the channel response and send the millimeter wave local oscillator frequency to the n millimeter wave transceivers.

[0061] The modem is configured to modulate the baseband signal transmitted by the 5G millimeter wave base station according to the propagation requirements of the MIMO link, to obtain a network signal conforming to the MIMO transmission protocol.

[0062] The modem is also used to convert the baseband signal into n parallel channels through time-space coding, one channel corresponding to one millimeter wave transceiver.

[0063] Therefore, for the downlink, the modem actually modulates the baseband signal transmitted by the 5G millimeter-wave base station according to the propagation requirements of the MIMO link while precoding the baseband signal into n parallel channels and sending them to n millimeter wave transceivers.

[0064] For the uplink, the M4R base station demodulates and combines the data in the MIMO link to regenerate signals that meet the 5G millimeter wave transmission protocol. [0065] The channel controller is configured to allocate corresponding millimeter wave local oscillator frequencies to the n millimeter wave transceivers and send the millimeter wave local oscillator frequencies to the n millimeter wave transceivers. In general, one channel corresponds to one millimeter-wave transceiver and one channel corresponds to one millimeter-wave local oscillator frequency. Therefore, one millimeter-wave local oscillator frequency corresponds to one millimeter-wave transceiver. According to different channel allocation conditions, the channel controller can The channel allocation situation assigns the corresponding millimeter-wave local oscillator frequency to each millimeter-wave transceiver to achieve channel division and prepare for subsequent MI MO transmission.

[0066] Referring to FIG. 5, the relay node is implemented by an analog circuit. The analog circuit includes: a millimeter-wave antenna, a millimeter-wave duplexer, a first mixer, a second mixer, a frequency allocation control unit, and low-frequency duplexing. Device, low-frequency antenna;

[0067] The millimeter wave signal of the millimeter wave base station received by the millimeter wave antenna is transmitted to the low frequency antenna and transmitted to the indoor terminal through the millimeter wave duplexer, the first mixer and the low frequency duplexer, and the millimeter wave signal is transmitted to the indoor mixer. Down-convert to the low-frequency carrier frequency band with the first carrier frequency of the frequency allocation control unit;

[0068] The signal of the low-frequency carrier frequency band of the indoor terminal received by the low-frequency antenna is transmitted to the millimeter-wave antenna and transmitted to the millimeter-wave base station via the low-frequency duplexer, the second mixer, and the millimeter-wave duplexer. The second mixer and the second carrier frequency of the frequency allocation control unit are up-converted to the millimeter wave carrier frequency band.

[0069] The relay node is very important in the M4R system, and it assumes the role of connecting the millimeter wave spectrum resource with the MIMO space resource. In the system, each relay node is assigned a corresponding millimeter wave subchannel. For the downlink, the relay node performs processing such as amplification and down conversion when receiving the corresponding subchannel signal. For the uplink, the relay node needs to modulate the signal to the millimeter wave band.

[0070] When it is very necessary to pay attention, the operation of the relay node on the signal is all performed in the manner of an analog circuit, and no modulation or demodulation operation is performed in the process. In this way, the structure of the relay node becomes very simple, and the delay of system processing is greatly reduced. This relay method actually establishes an active MIMO channel. The transmitted signal is opaque to the relay node.

[0071] Outside the signal link, the relay node includes a control circuit, which is responsible for communicating with the M4R base station, managing subchannel allocation, amplifying gain, and synchronizing with the system.

[0072] Generally, on the premise of not exceeding the maximum data rate that a millimeter wave channel can provide, the more relay nodes, the greater the data throughput that can be provided. The M4R relay node can be implemented at low cost because of its simple structure, and can be deployed on a large scale to maximize communication capacity. [0073] The distribution of relay nodes should be as dispersed as possible, which is conducive to increasing spatial complexity and improving MIMO capacity. This may require M4R base stations to provide wider beams. The millimeter wave antenna is usually designed as a higher gain and narrower beam. Therefore, compromises need to be considered when deploying nodes. Or for the case where the relay nodes are scattered, communication is performed by using a multi-beam millimeter wave antenna and a beam forming method.

[0074] Next, the indoor terminal will be described:

[0075] The M4R system has high compatibility and can be applied to a variety of indoor terminals that can support MIMO, such as the current WI-FI system.

[0076] The indoor terminal needs to complete the channel estimation in cooperation with the millimeter wave base station to optimize the transmission rate. In some cases, when the indoor terminal cannot feedback the channel information to the base station, another protocol may be enabled to demodulate the MI MO signal locally.

[0077] The indoor terminal may have various forms, and what affects the channel capacity of the system lies in the total number of antennas. A terminal can have one or more antennas and their transceiver units. Multi-antenna terminals generally allow higher channel capacity.

[0078] Further, the M4R base station and the MIMO network also communicate through a virtual MIMO channel, and the virtual MIMO channel includes a millimeter wave band and a low frequency band.

[0079] The M4R system establishes a Virtual MIMO (V-MIMO for short) channel, including millimeter wave and low frequency band. Due to the existence of the relay, this channel has active characteristics, and its link gain can be adjusted. At the same time, the uplink and downlink channels are non-reciprocal, so separate channel estimates are required.

[0080] For a MIMO system, the channel information of the transmitting end is very important to optimize the channel capacity of the system, which requires a certain feedback from the receiving end. In the downlink of M4R, such feedback exists when the indoor terminal receives the channel estimation instruction, analyzes the received training signal, obtains the parameters of the channel estimation, and feeds it back to the M4R base station. For different indoor terminals, there are different channel estimation methods.

[0081] When the indoor terminal is a single device with multiple antennas, channel estimation can be performed more efficiently, and the channels of the receiver are easily synchronized. When there are multiple indoor terminals, each terminal can sequentially respond to the instructions of the transmitting terminal, and the base station performs the MIMO algorithm according to the feedback situation of each terminal. When multiple indoor terminals cannot cooperate and cannot effectively feedback information to the base station, channel feedback is not performed.

[0082] In particular, it should be noted that, compared with the conventional MIMO, the M4R system increases the variable of the carrier frequency of the millimeter wave subchannel. For millimeter-wave channels, channels with a strong LOS can generally be considered . According to current research on millimeter wave channels, it has relatively flat attenuation characteristics. The frequency response of each sub-channel is flat and the relay node position is relatively fixed. Therefore, the millimeter wave link in M4R can be considered as static or quasi-static. However, for different relay nodes, the attenuation characteristics of the same subchannel may be different. Therefore, during the operation of the system, the attenuation characteristics of each relay channel on each sub-channel can be periodically measured, and the planning can be unified according to the feedback situation of the indoor terminal to maximize the channel capacity.

[0083] In addition, when the M4R is deployed, the position and frequency of the relay node can be optimized, thereby fixing its corresponding subchannel carrier, and no adjustment is made when the system is running. This can simplify the channel estimation algorithm and simplify the circuit design of the relay node, which can be used for rapid deployment.

[0084] This system also needs to dynamically optimize the channel capacity, increase the data throughput rate when the system is busy, or reduce power consumption when the system is idle. This can be achieved by switching some relay nodes.

[0085] Further, the uplink and downlink of the M4R base station and the MIMO network adopt a MIMO transmission mode or a time division frequency division multi-user access mode.

[0086] Generally, in a communication system, the data rate requirement on the downlink is much higher than that on the uplink. In M4R, both uplink and downlink can support MIMO transmission. For the downlink, maximizing the peak rate is critical, so it can keep running in MIMO spatial multiplexing mode. For the uplink, the requirements on the rate are small, so in certain cases, lower-speed transmission methods can be used, such as multi-user access mode using time division or frequency division, which can simplify the algorithm and save energy. . For uplinks that also require high transmission rates, M4R supports uplink and downlink full MIMO transmission.

[0087] In a MIMO network, in general, one M4R base station corresponds to one or several groups of relay nodes, so that low latency and easy synchronization are guaranteed. Relay nodes can be grouped to serve one or more buildings. When a relay node is deployed, it can be embedded in the building or hung on the exterior wall, roof, etc.

[0088] One or more buildings are arranged in a cell, and can be used as a cell for networking. In the networking of the embodiment shown in FIG. 1, there are three cells in total, each of which is circled by an ellipse.

[0089] Further, the MIMO network of the neighboring cell uses different millimeter wave subchannels and different low frequency bands.

[0090] There may be multiple relay nodes on a single building, and these nodes may receive signals from multiple M4R base stations number. In practice, neighboring base stations need to work together to reduce inter-cell crosstalk.

[0091] (1) The base station avoids signal leakage to neighboring cells through beamforming;

[0092] (2) Adjacent cells can use different millimeter-wave subchannels and different low-frequency bands to build local MIs.

MO Network.

[0093] (3) According to the overall network requirements, the base station may choose to switch some of the relay nodes to prevent it from receiving stronger signals from the base stations in neighboring cells, while saving energy.

[0094] As mentioned above, the above embodiments are only used to describe the technical solution of the present invention, but not limited thereto. Although the present invention has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that: The technical solutions described in the foregoing embodiments may be modified, or some of the technical features are equivalently replaced; and these modifications or replacements do not depart from the spirit and scope of the technical solutions of the embodiments of the present invention .

Industrial applicability

[0095] An industrial practical description paragraph is entered here.

Sequence Listing Free Content

[0096] Type the free listing description paragraph of the sequence listing here.

Claims

Claim

[Claim 1] A cell networking structure extended to a 5G network, characterized in that it includes: a core network, 5

G millimeter wave base station, M4R base station and MIMO network;

The core network is connected to the 5G millimeter wave base station through a millimeter wave or an optical fiber;

The 5G millimeter wave base station and the M4R base station are connected through a millimeter wave link;

The M4R base station is configured to process a network signal sent by the 5G millimeter wave base station, so that the network signal complies with a MIMO transmission protocol, and send the processed network signal to a MIMO network;

An M4R network unit includes three main parts: M4R base station, relay node, and indoor terminal. First, the M4R base station subdivides the wideband millimeter wave spectrum into narrower bandwidth subchannels; the frequency bandwidth of each subchannel and the system use The frequency bandwidth of the Sub 6GHz band is consistent and does not overlap in the frequency domain, forming a set of parallel signal paths; the subchannels communicate with the distributed relay nodes via the millimeter wave channel of the M 4R millimeter wave base station; the relay The node is placed outdoors and forms a LOS channel with the millimeter wave base station; each subchannel corresponds to a relay node, and the millimeter wave subchannel is converted by the relay node to a uniform carrier frequency in the Sub 6GHz band; After amplification, the signals of each subchannel communicate with the indoor terminal in the form of MIMO; and the indoor terminal receives and processes the signals in the form of MIMO.

[Claim 2] The cell networking structure extended to a 5G network according to claim 1, wherein the MIMO network includes a relay node and an indoor terminal; and the relay node receives the M4R base station The network signal is sent and the network signal is frequency converted to obtain a signal in a low frequency band, and the signal in the low frequency band is transmitted to the indoor terminal.

[Claim 3] The cell networking structure extended to a 5G network according to claim 1, wherein the M4R base station includes: a modem, n millimeter-wave transceivers, a channel controller, and a split combiner. And m antennas, n is greater than or equal to 1 and m is greater than or equal to 1;

The modem is connected to the 5G millimeter wave base station, the modem is also connected to the n millimeter wave transceivers, and the n millimeter wave transceivers are connected to the m antennas through the split combiner; The channel controller is connected to the n millimeter wave transceivers, and is configured to calculate a channel response and send the millimeter wave local oscillator frequency to the n millimeter wave transceivers.

[Claim 4] The cell networking structure extended to a 5G network according to claim 3, wherein the modem is used to transmit baseband to the 5G millimeter wave base station according to the propagation requirements of the MIMO link. Signal modulation to obtain a network signal conforming to the MIMO transmission protocol

[Claim 5] The cell networking structure extended to a 5G network according to claim 3, wherein the modem is further configured to convert the baseband signal into n parallel channels through time-space coding, One channel corresponds to one millimeter wave transceiver.

[Claim 6] The cell networking structure extended to a 5G network according to claim 3, wherein the channel controller is configured to allocate corresponding millimeter-wave local oscillators to the n millimeter-wave transceivers. Frequency and sends the millimeter wave local oscillator frequency to the n millimeter wave transceivers.

[Claim 7] The cell networking structure extended to a 5G network according to claim 2, wherein the relay node is implemented by an analog circuit, and the analog circuit includes: a millimeter wave antenna, a millimeter wave A duplexer, a first mixer, a second mixer, a frequency allocation control unit, a low-frequency duplexer, and a low-frequency antenna;

The millimeter-wave signal of the millimeter-wave base station received by the millimeter-wave antenna is transmitted to the low-frequency antenna and transmitted to the indoor via the millimeter-wave duplexer, the first mixer, and the low-frequency duplexer. At the terminal, the millimeter-wave signal is down-converted to a low-frequency carrier frequency band at the first carrier frequency of the first mixer and the frequency allocation control unit;

The low-frequency carrier frequency band signal of the indoor terminal received by the low-frequency antenna is transmitted to the millimeter-wave antenna and transmitted to the millimeter-wave antenna via the low-frequency duplexer, the second mixer, and the millimeter-wave duplexer. In a millimeter-wave base station, a signal in a low-frequency carrier frequency band is up-converted to a millimeter-wave carrier frequency band in the second mixer and a second carrier frequency of the frequency allocation control unit.

[Claim 8] The cell networking structure extended to a 5G network according to claim 1, wherein the M4R base station and the MIMO network further communicate through a virtual MIMO channel, and the virtual MIMO channels include millimeter wave bands and low frequency bands.

[Claim 9] A cell networking structure extended to a 5G network according to claim 1, characterized in that Therefore, the uplink and downlink of the M4R base station and the MIMO network adopt a MIMO transmission mode or a time division frequency division multi-user access mode.

[Claim 10] A cell networking structure extended to a 5G network according to claim 2, characterized in that the MIMO networks of adjacent cells use different millimeter wave subchannels and different low frequency bands.