CN112867018A - Method and system for increasing frequency spectrum bandwidth and millimeter wave imaging - Google Patents
Method and system for increasing frequency spectrum bandwidth and millimeter wave imaging Download PDFInfo
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Abstract
本发明公开了一种增加频谱带宽、毫米波成像的方法和系统，包括机房A和机房B，所述机房A中设置有微波网管，所述微波网管右侧设置有毫米波发射器，所述毫米波发射器下方设置有三个RRU，所述机房B内部设置有UTN，所述UTN上方设置有BBU，所述BBU上方设置有毫米波接收器，所述UTN右侧连接有无线网管，所述无线网管设置在所述机房B外部，所述机房A内部的所述毫米波发射器发射1+0微波，所述机房B内部的毫米波接收器接收外部的毫米波，所述毫米波发射器与所述毫米波接收器之间产生1+0微波链路，本系统结构简单，操作方便，信息传输安全性高，可以满足大基站的信令信号可以直接传至终端，保证小基站的数据信号可以直接传送到终端，保证小基站的回传信号传到大基站。
The invention discloses a method and a system for increasing spectrum bandwidth and millimeter wave imaging, including a computer room A and a computer room B. The computer room A is provided with a microwave network management system, and a millimeter wave transmitter is arranged on the right side of the microwave network management system. Three RRUs are arranged below the millimeter-wave transmitter, a UTN is arranged inside the computer room B, a BBU is arranged above the UTN, a millimeter-wave receiver is arranged above the BBU, and a wireless network management is connected to the right side of the UTN. The wireless network management is set outside the computer room B, the millimeter wave transmitter in the computer room A transmits 1+0 microwaves, the millimeter wave receiver in the computer room B receives the external millimeter waves, and the millimeter wave transmitter A 1+0 microwave link is generated between the millimeter wave receiver and the millimeter wave receiver. The system has a simple structure, convenient operation, and high information transmission security. It can satisfy the signaling signal of the large base station and can be directly transmitted to the terminal, ensuring the data of the small base station. The signal can be directly transmitted to the terminal to ensure that the backhaul signal of the small base station is transmitted to the large base station.
Description
Technical Field
The invention relates to the technical field of frequency spectrum bandwidth and millimeter wave imaging, in particular to a method and a system for increasing frequency spectrum bandwidth and millimeter wave imaging.
Background
The millimeter wave communication technology is a wireless transmission communication technology with high quality, constant parameters and mature technology, the 5G mobile communication system is a wide-coverage, high-capacity, multi-connection, low-delay and high-reliability network, and the application of the millimeter wave communication technology to the 5G communication system is a vision generally accepted by the industry.
The healthy development of the high-frequency industry needs the common effort of the whole industry, promotes the maturity of an industrial chain and explores application scenes to complement each other, promotes unified frequency planning, the maturity of a high-frequency core chip, the shaping of a high-frequency OTA system testing tool, the efficiency problem of an ultra-wideband PA and the like, and continuously explores the requirements of scenes such as fixed wireless access, self-return and the like.
(1) Concept, advantages and disadvantages, and propagation characteristics of millimeter waves
Generally, the millimeter wave frequency band is 30 GHz-300 GHz, the corresponding wavelength is 1 mm-10 mm, and the microwave of E-band and V-band frequency bands is the millimeter wave product. Millimeter wave communication refers to communication using millimeter waves as carriers for transmitting information.
Millimeter wave utilizes atmospheric window (frequency where some attenuation due to resonance absorption of gas molecules is minimal when millimeter wave and submillimeter wave propagate in the atmosphere)
1) Extremely wide bandwidth. Generally, the millimeter wave frequency range is 26.5-300 GHz, and the bandwidth is up to 273.5 GHz. More than 10 times the total bandwidth from dc to microwave. Even if atmospheric absorption is considered, only four main windows can be used for propagation in the atmosphere, but the total bandwidth of the four windows can reach 135GHz, which is 5 times of the sum of the bandwidths of the bands below the microwave. This is clearly very attractive today when frequency resources are tight.
2) The beam is narrow. The beam of millimeter waves is much narrower than the beam of microwaves for the same antenna size. For example, a 12cm antenna, has a beam width of 18 degrees at 9.4GHz and only 1.8 degrees at 94 GHz. Small objects that are closer together or the details of the objects that are viewed more clearly can be resolved.
3) The propagation of millimeter waves is much less affected by weather than laser light and can be considered to be all weather.
4) The millimeter wave components are much smaller in size than microwaves. The millimeter wave system is more easily miniaturized.
The millimeter wave defect:
1) the propagation attenuation in the atmosphere is severe.
2) The requirement on the processing precision of the device is high.
The factors influencing the propagation characteristics of millimeter waves mainly include: the combined action of the molecular absorption (oxygen, water vapor, etc.), precipitation (including rain, fog, snow, hail, cloud, etc.), suspended matters (dust, smoke, etc.) in the atmosphere, and environment (including vegetation, ground, obstacles, etc.), can attenuate, scatter, change polarization and propagation path of millimeter wave signals, and further introduce new noise into millimeter wave system, which will have great influence on the operation of millimeter wave system, so we must study the propagation characteristics of millimeter wave in detail.
(2) Research progress of domestic and foreign 5G millimeter wave frequency spectrum
Spectrum resources are a prerequisite for the development of 5G. At present, the division of the 5G frequency spectrum is diverged internationally, and the division condition of the frequency spectrum influences the development progress of an industrial chain. In the aspect of frequency resources, a C band is a preferred frequency band for 5G test and deployment, for millimeter waves with ultra-large bandwidth, 11 frequency band research ranges are selected in the WRC19 AI1.13 topic, the research ranges span 24.25-86 GHz frequency bands, research is mainly performed around 3 aspects, frequency spectrum requirements, intersystem interference coexistence and candidate frequency bands are respectively, and finally discussion and determination are performed in various countries in a WRC-19 conference. The planning and view of spectrum partitioning varies from country to country. It is known that the worldwide IMT industry chain is pushing jointly the worldwide uniform millimeter wave band planning to achieve the largest economies of scale. The European Union mainly pushes a 26GHz frequency band, the United states, Japan and Korea mainly push the development of 28GHz and 39GHz frequency bands, and in China, 7 months in 2017, the Ministry of industry and informatization wholesale of 24.75-27.5 GHz and 37-42.5 GHz is used for research and development of 5G technology. From the important point of spectrum research at home and abroad, 26GHz and 39GHz are the priority promotion frequency bands of the current millimeter waves. Current IMT focuses on and promotes in-band coexistence in the 26GHz and 39/40GHz bands. The adjacent frequency coexistence research of EESS (P) is the focus and difficulty of the research in the present industry, the initial research and simulation results of the current parties are integrated, the existing 3GPP index (-13dBm/MHz) needs to be increased, the difficulty of equipment realization is larger, and the European Union considers the establishment of the out-of-band index of 5G equipment with a 26GHz frequency band
(3) Chip, terminal and test development
The development of 5G can not be in vigorous cooperation with an industrial chain, the chip and the terminal are quickly matured at present, and the commercial industrial chain is complete. On the aspect of chips, the current high-traffic X50 series can support 3.5GHz, 4.5GHz, 28GHz and 39GHz, and the future X5X series can support 3.5GHz, 4.5GHz, sub 3GHz, 28GHz and 39 GHz; balong 5000 of Haisia Hua supports 3.5GHz, 4.5GHz, sub 3GHz, 28GHz and 39GHz, and Balong 50x0 will be developed in the future and supports 3.5GHz, 4.5GHz, sub 3GHz, 28GHz and 39 GHz; MTP V1 of Intel supports 3.5GHz, 4.5GHz, sub 3GHz, 28GHz and 39GHz, and MTP V2 will be developed in the future and supports 3.5GHz, 4.5GHz, sub 3GHz, 28GHz and 39 GHz; the samsung S5100 supports 3.5GHz, 4.5GHz, sub 3GHz, 28GHz, and 39GHz, and S5110 will be developed in the future and supports 3.5GHz, 4.5GHz, sub 3GHz, 28GHz, and 39 GHz.
(4) The millimeter wave is faced with difficulties and development trends
The strong capability and rich connection scenes of 5G will certainly arouse the application requirements of various industries, and the requirements are difficult to realize only by means of middle and low frequency bands, so that high, middle and low frequency cooperative work is needed, and better user experience is continuously created in different scenes. For this reason, millimeter waves are a necessary trend to meet the 5G demand. Because the millimeter wave transmission characteristics are obviously different from those of the C-band and the bands below 3GHz, the application of the millimeter wave faces serious challenges: the specifications of equipment under different application scenes are not known, great differences exist between the power, integration level, efficiency and cost of key devices and commercial use, the technologies such as calibration, linearization and heat dissipation are still imperfect, and the experience is also lacking in the aspects of efficient coverage and networking. However, the advantages of high rate transmission are still significant because of the large bandwidth of the millimeter-wave band, and thus the advantages are compatible with the challenges.
Disclosure of Invention
The invention aims to overcome the defects of the prior art, and the loss of the free space omnidirectional path is in direct proportion to the square of the frequency according to the Fris propagation rule. Therefore, millimeter wave communication systems need to employ large-scale array antenna communication techniques to compensate for millimeter wave propagation path loss. According to the law, the invention provides a method and a system for increasing the frequency spectrum bandwidth and millimeter wave imaging.
In order to achieve the purpose, the invention provides the following technical scheme: a method and a system for increasing frequency spectrum bandwidth and millimeter wave imaging comprise a machine room A and a machine room B, wherein a microwave network management is arranged in the machine room A, a millimeter wave transmitter is arranged on the right side of the microwave network management, three RRUs are arranged below the millimeter wave transmitter, a UTN is arranged in the machine room B, a BBU is arranged above the UTN, a millimeter wave receiver is arranged above the BBU, the right side of the UTN is connected with a wireless network management, the wireless network management is arranged outside the machine room B, the millimeter wave transmitter in the machine room A transmits 1+0 microwaves, the millimeter wave receiver in the machine room B receives external millimeter waves, a 1+0 microwave link is generated between the millimeter wave transmitter and the millimeter wave receiver, and the microwave network management can extract quality data of the 1+0 microwave link.
As a preferred technical solution of the present invention, the three RRUs are connected in series.
As a preferred technical solution of the present invention, the millimeter waves in the 1+0 microwave link are configured to 2000MHz &64QAM, an air interface capacity 8G, and a service rate 9.8G.
As a preferred technical solution of the present invention, the RRU is a radio remote unit, and is divided into an intermediate frequency module, a transceiver module, a power amplifier, and a filtering module. The digital intermediate frequency module is used for modulation and demodulation, digital up-down frequency conversion, A/D conversion and the like of optical transmission; the transceiver module completes the conversion from the intermediate frequency signal to the radio frequency signal; and then the radio frequency signal is transmitted out through the antenna port by the power amplifier and the filtering module.
As a preferred technical solution of the present invention, the UTN is an integrated services optical transmission network.
As a preferred technical solution of the present invention, the BBU is a baseband processing unit, and the BBU and the RRU are connected by an optical fiber.
Compared with the prior art, the invention has the beneficial effects that: the system has the advantages of simple structure, convenient operation and high information transmission safety. Meanwhile, the 5G network system may consider a scheme in which signaling and data are respectively carried through different main frequency channels, so that the signaling is carried in a low frequency band, and the data is carried in a millimeter wave band, i.e., the application scenario of millimeter waves is concentrated in high data volume transmission between the small base station and the terminal and mobile communication backhaul transmission between the small base station and the large base station. The scheme of the signaling and data shunt control not only can fully utilize the bandwidth of the frequency band of millimeter wave transmission data to obtain extremely high data transmission rate and efficiency, but also can greatly reduce the transmission interference between the signaling and the data. Because the signaling is carried in a low-frequency channel, the coverage range can be wider; meanwhile, the number of the control terminals can be more because the signaling flow is smaller. When the data stream is carried in the millimeter wave channel, although the coverage is small, the transmission bandwidth is large, and the requirements of high speed and high access rate of the terminal can be met. In the channel frequency division transmission of signaling and data, 2G or 3G main frequency can be taken as a 5G low-frequency signaling channel, so that part of the existing base stations can be preferably selected as 5G big base stations, the antenna coverage radius of the big base stations is about 1 time of the effective coverage radius of millimeter waves by adjusting the height and the downward inclination angle of the antenna, and the small base stations are just positioned at the middle positions of the terminal and the big base stations, thereby not only meeting the requirement that the signaling signals of the big base stations can be directly transmitted to the terminal, but also ensuring that the data signals of the small base stations can be directly transmitted to the terminal and the return signals of the small base stations can be transmitted to the big base stations, more importantly, the honeycomb layout mode of the big base stations and the frequency division transmission mode of the signaling data can effectively utilize the original base stations, reduce the number of the original 2G, 3G and, the base station renting, building and maintaining cost is reduced, and the inter-station interference can be effectively reduced.
Drawings
The accompanying drawings, which are included to provide a further understanding of the invention and are incorporated in and constitute a part of this specification, illustrate embodiments of the invention and together with the description serve to explain the principles of the invention and not to limit the invention. In the drawings:
fig. 1 is a structural diagram of a method and a system for increasing spectral bandwidth and millimeter wave imaging according to the present invention.
In the figure: 1. a machine room A; 2. RRU; 3. microwave network management; 4. UTN; 5. a millimeter wave transmitter; 6. 1+0 microwave link; 7. a millimeter wave receiver; 8. wireless network management; 9. BBU; 10. and machine room B.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all embodiments, and all other embodiments obtained by a person of ordinary skill in the art without creative efforts based on the embodiments of the present invention belong to the protection scope of the present invention.
Referring to fig. 1, the present invention provides a technical solution: a method and a system for increasing spectral bandwidth and millimeter wave imaging comprise a machine room A1 and a machine room B10, wherein a microwave network management system 3 is arranged in the machine room A1, a millimeter wave transmitter 5 is arranged on the right side of the microwave network management system 3, three RRUs 2 are arranged below the millimeter wave transmitter 5, UTN4 is arranged in the machine room B10, a BBU9 is arranged above UTN4, a millimeter wave receiver 7 is arranged above the BBU9, a wireless network management system 8 is connected on the right side of UTN4, the wireless network management system 8 is arranged outside the machine room B10, the millimeter wave transmitter 5 in the machine room A1 transmits 1+0 microwaves, the millimeter wave receiver 7 in the machine room B10 receives external millimeter waves, a 1+0 microwave link 6 is generated between the millimeter wave transmitter 5 and the millimeter wave receiver 7, the microwave network management system 3 can extract the quality data of the 1+0 microwave link 6, the three RRUs 2 are connected in series, the millimeter, the air interface capacity is 8G, the service rate is 9.8G, and the RRU2 is a radio remote unit and is divided into an intermediate frequency module, a transceiver module, a power amplifier and a filter module. The digital intermediate frequency module is used for modulation and demodulation, digital up-down frequency conversion, A/D conversion and the like of optical transmission; the transceiver module completes the conversion from the intermediate frequency signal to the radio frequency signal; and the radio frequency signal is transmitted out through an antenna port through a power amplifier and filter module, the UTN4 is an integrated service optical transmission network, the BBU9 is a baseband processing unit, and the BBU is connected with the RRU through an optical fiber.
The specific principle is as follows: firstly, the resource utilization rate is improved by more than 10 times on the basis of 4G by introducing a novel wireless transmission technology; secondly, the throughput rate of the whole system is improved by about 25 times by introducing a novel system structure, such as ultra-dense networking, control plane and data plane separation and the like, and deeper intelligent capacity; and finally, further mining novel frequency resources, such as millimeter waves, visible light, laser communication and the like, so that the frequency resources of the mobile communication are expanded by about 4 times. When in use, the small base station only needs to bear the data flow of the millimeter wave channel, the network design is equivalent to the local area network, and a plurality of functions in the wireless cellular access network can be borne by the large base station. The receiving and sending power of the miniature antenna is not large, so long as the technology and the process can integrate the antenna equipment of the small base station and the remote meter reading power metering equipment in a smaller space, and the small base station can be made to be small and portable enough and easy to install, so that the small base station has enough humanization, landscaping, diversification and practicability, and can be directly hung on public buildings such as street lamps, landscape tables, high-rise decorations and monument towers, even outdoor walls of public buildings such as libraries, gymnasiums, schools, hospitals and office buildings and private houses of houses by only connecting in a power supply and being capable of being wirelessly and directly connected with the large base station. The millimeter wave technology and the large and small base stations are combined, and are important schemes for supporting a 5G access network architecture.
The invention has the beneficial effects that: the system has the advantages of simple structure, convenient operation and high information transmission safety. Meanwhile, the 5G network system may consider a scheme in which signaling and data are respectively carried through different main frequency channels, so that the signaling is carried in a low frequency band, and the data is carried in a millimeter wave band, i.e., the application scenario of millimeter waves is concentrated in high data volume transmission between the small base station and the terminal and mobile communication backhaul transmission between the small base station and the large base station. The scheme of the signaling and data shunt control not only can fully utilize the bandwidth of the frequency band of millimeter wave transmission data to obtain extremely high data transmission rate and efficiency, but also can greatly reduce the transmission interference between the signaling and the data. Because the signaling is carried in a low-frequency channel, the coverage range can be wider; meanwhile, the number of the control terminals can be more because the signaling flow is smaller. When the data stream is carried in the millimeter wave channel, although the coverage is small, the transmission bandwidth is large, and the requirements of high speed and high access rate of the terminal can be met. In the channel frequency division transmission of signaling and data, 2G or 3G main frequency can be taken as a 5G low-frequency signaling channel, so that part of the existing base stations can be preferably selected as 5G big base stations, the antenna coverage radius of the big base stations is about 1 time of the effective coverage radius of millimeter waves by adjusting the height and the downward inclination angle of the antenna, and the small base stations are just positioned at the middle positions of the terminal and the big base stations, thereby not only meeting the requirement that the signaling signals of the big base stations can be directly transmitted to the terminal, but also ensuring that the data signals of the small base stations can be directly transmitted to the terminal and the return signals of the small base stations can be transmitted to the big base stations, more importantly, the honeycomb layout mode of the big base stations and the frequency division transmission mode of the signaling data can effectively utilize the original base stations, reduce the number of the original 2G, 3G and, the base station renting, building and maintaining cost is reduced, and the inter-station interference can be effectively reduced.
Finally, it should be noted that: although the present invention has been described in detail with reference to the foregoing embodiments, it will be apparent to those skilled in the art that modifications may be made to the embodiments or portions thereof without departing from the spirit and scope of the invention.
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2024021609A1 (en) * | 2022-07-27 | 2024-02-01 | 中兴通讯股份有限公司 | Millimeter wave transmitter and receiver apparatus and communication system |
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| CN208386538U (en) * | 2018-07-02 | 2019-01-15 | 成都吉纬科技有限公司 | A kind of mm wave RF receive-transmit system |
| CN208401840U (en) * | 2018-07-02 | 2019-01-18 | 成都吉纬科技有限公司 | A kind of millimeter wave transceiving device |
| CN111082861A (en) * | 2019-12-02 | 2020-04-28 | 广东省电信规划设计院有限公司 | Millimeter wave communication test system |
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2020
- 2020-12-29 CN CN202011601411.8A patent/CN112867018A/en active Pending
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| US20060264210A1 (en) * | 2001-05-02 | 2006-11-23 | Trex Enterprises Corp. | Wireless millimeter wave communication system with mobile base station |
| US9178735B1 (en) * | 2014-07-23 | 2015-11-03 | Lattice Semiconductor Corporation | Phase-modulated on-off keying for millimeter wave spectrum control |
| CN208386538U (en) * | 2018-07-02 | 2019-01-15 | 成都吉纬科技有限公司 | A kind of mm wave RF receive-transmit system |
| CN208401840U (en) * | 2018-07-02 | 2019-01-18 | 成都吉纬科技有限公司 | A kind of millimeter wave transceiving device |
| CN111082861A (en) * | 2019-12-02 | 2020-04-28 | 广东省电信规划设计院有限公司 | Millimeter wave communication test system |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| WO2024021609A1 (en) * | 2022-07-27 | 2024-02-01 | 中兴通讯股份有限公司 | Millimeter wave transmitter and receiver apparatus and communication system |
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