4G / 5G and fixed network integrated transmission system based on optical fiber cable hybrid network

Abstract

The utility model discloses a 4G / 5G wireless and fixed network fusion transmission system based on an optical fiber and cable hybrid network, the transmission system comprises a DOCSIS system and a 4G / 5G communication system fused with the DOCSIS system, the DOCSIS system comprises a front end, a distribution network connected with the front end and a rear end connected with the distribution network, and the rear end is connected with the distribution network. The front end is composed of a server, a router connected with the server, and a CMTS module connected with the router. The 4G / 5G communication system comprises a core network, a 4G / 5G wireless baseband processing unit connected with the core network, and an IP network switch connected with the 4G / 5G wireless baseband processing unit, and the IP network switch is connected with the router at the front end. Therefore, according to the utility model, the 4G / 5G system deployment cost in family and enterprise scenes can be obviously reduced; wired and wireless multi-network integration and multi-service integration can also be realized, and the problem of weak indoor signal coverage is solved.

Description

Technical Field

[0001] This utility model belongs to the field of information technology, and in particular relates to a 4G / 5G and fixed network convergence transmission system based on a fiber optic cable hybrid network. Background Technology

[0002] DOCSIS (Data Over Cable Service Interface Specification) is a specification for the data interface in cable television systems. DOCSIS systems and Passive Optical Networks (PON) are currently the two mainstream technologies for cable television and home broadband networks. Due to historical investment legacies, DOCSIS systems are still widely used in less developed regions such as Europe and America. The latest DOCSIS 4.0 standard can achieve downlink speeds of 10Gbps and uplink speeds of 1Gbps, fully meeting household needs. The main equipment in traditional DOCSIS systems is the CMTS (Cable Modem Termination System) and the CM (Cable Modem), which does not yet support accurate delay measurement and compensation, and cannot meet the air interface synchronization requirements of wireless communication. Traditional 4G / 5G systems require fiber optic cables for fronthaul or backhaul deployment and cannot support DOCSIS systems based on coaxial cables. Traditional full-bandwidth 4G / 5G systems consume more than 10Gbps of transmission bandwidth, exceeding the fixed bandwidth requirements of a typical household. In addition, the number of household users is relatively small, and their bandwidth requirements are low. Therefore, customized solutions for households are needed, which increases deployment costs.

[0003] To address the aforementioned technical issues, this invention proposes a timing and transmission system based on a fiber optic cable hybrid network that integrates 4G / 5G and fixed-line networks. This system provides 4G / 5G mobile communication services in systems that previously lacked wireless signal transmission and can meet the needs of up to 100 users in home and enterprise scenarios. Utility Model Content

[0004] In view of this, the purpose of this utility model is to provide a 4G / 5G and fixed-line converged transmission system based on a fiber optic cable hybrid network. This system can not only enable the transmission of 4G / 5G signals in existing DOCSIS systems and significantly reduce the deployment cost of 4G / 5G systems in home scenarios, but also add 4G / 5G services to traditional home broadband lines, achieving the integration of wired and wireless networks and multiple services, and solving the problem of weak indoor signal coverage.

[0005] To achieve the above objectives, this utility model provides a 4G / 5G and fixed-line converged transmission system based on a fiber optic cable hybrid network. The transmission system includes a DOCSIS system and a 4G / 5G communication system integrated with the DOCSIS system. The DOCSIS system includes a front-end, a distribution network connected to the front-end, and a back-end connected to the distribution network. The front-end consists of a server, a router connected to the server, and a CMTS module connected to the router. The 4G / 5G communication system includes a core network, a 4G / 5G wireless baseband processing unit connected to the core network, and an IP network switch connected to the 4G / 5G wireless baseband processing unit. The IP network switch is connected to the router at the front end.

[0006] Preferably, the distribution network consists of an HFC module for transmitting data signals and connecting the front-end CMTS module to each back-end CM module, and an amplifier for enhancing signal strength and ensuring that the signal can be transmitted to each user terminal.

[0007] Preferably, the backend includes a CM module and a user equipment, wherein the CM module communicates with the CMTS module through the distribution network.

[0008] More preferably, the backend also includes a remote radio frequency transceiver unit connected to the CM module for the mobile phone to access the DOCSIS system.

[0009] Preferably, the IP network switch and the 4G / 5G radio frequency transceiver unit adjust the frequency of the clock chip by acquiring the time deviation, so as to achieve precise clock synchronization and wireless air interface synchronization.

[0010] The beneficial effects of this utility model are as follows: The technical solution of this utility model includes a DOCSIS system and a 4G / 5G communication system integrated with the DOCSIS system. The DOCSIS system includes a front-end, a distribution network connected to the front-end, and a back-end connected to the distribution network. The front-end consists of a server, a router connected to the server, and a CMTS module connected to the router. The 4G / 5G communication system includes a core network, a 4G / 5G wireless baseband processing unit connected to the core network, and an IP network switch connected to the 4G / 5G wireless baseband processing unit. The IP network switch is connected to the router of the front-end. Therefore, this utility model not only significantly reduces the deployment cost of 4G / 5G systems in home scenarios by transmitting 4G / 5G signals through an existing DOCSIS system, but also adds 4G / 5G services to traditional home broadband lines, realizing the integration of wired and wireless networks, the integration of multiple services, and solving the problem of weak indoor signal coverage. Attached Figure Description

[0011] To make the objectives, technical solutions, and beneficial effects of this utility model clearer, the following drawings are provided for illustration:

[0012] Figure 1 This is a schematic diagram of the structure of the 4G / 5G and fixed-line converged transmission system based on a fiber optic cable hybrid network, as described in an embodiment of this utility model.

[0013] Figure 2 This is a network topology diagram of the 4G / 5G and fixed-line converged transmission system based on a fiber optic cable hybrid network as described in this embodiment of the present invention. Detailed Implementation

[0014] The technical solutions of the embodiments of this application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this application, and not all embodiments. Based on the embodiments of this application, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of this application.

[0015] While DOCSIS is not a mainstream transmission technology in 5G communications, it still plays an important role in certain application scenarios. For example, integrating DOCSIS technology into FWA (Fixed Wireless Access) 5G communications can deliver high-speed internet services to homes or businesses, providing users with access speeds and experiences similar to fiber optics. This application integrates the latest 5G Release 17 RedCap technology into existing DOCSIS systems, reducing the deployment cost of 5G systems while also enabling convenient transmission of 5G signals to traditional cable-based homes.

[0016] like Figure 1 and Figure 2As shown, this utility model embodiment provides a 4G / 5G and fixed-line converged transmission system based on a fiber optic cable hybrid network. The transmission system includes a DOCSIS system 10 and a 4G / 5G communication system 20 integrated with the DOCSIS system 10. The DOCSIS system 10 includes a front-end 11, a distribution network 12 connected to the front-end 11, and a back-end 13 connected to the distribution network 12. The front-end 11 consists of an APP Server, a router connected to the server, and a CMTS module connected to the router. The 4G / 5G communication system includes a core network (5GC) 21, a 4G / 5G wireless baseband processing unit (BBU) 22 connected to the core network (5GC) 21, and an IP network switch 23 connected to the 4G / 5G wireless baseband processing unit (BBU) 22. The IP network switch 23 is connected to the router of the front-end 11.

[0017] In this embodiment of the present invention, the distribution network 12 consists of an HFC module (fiber optic coaxial cable) for transmitting data signals and connecting the CMTS module of the front end 11 to the CM modules of each back end 13, and an amplifier for enhancing signal strength and ensuring that the signal can be transmitted to each user end.

[0018] In this embodiment of the invention, the backend 13 includes a CM module and user equipment. The CM module communicates with the CMTS module through the distribution network, that is, the CM module communicates with the CMTS module sequentially through the HFC module and the amplifier. It should be noted that in this application, there are multiple CM modules, such as CM1, ..., CMn; the user equipment includes computers (PC1, ..., PCn) and televisions (TV1, ..., TVn).

[0019] In this embodiment of the invention, the backend further includes a 4G / 5G radio frequency transceiver unit (RRU) connected to the CM module, used for the mobile phone to access the DOCSIS system. It should be noted that the 4G / 5G radio frequency transceiver unit (RRU) in this application includes RRU1, ..., RRUUn.

[0020] In this embodiment of the invention, the IP network switch BBU and the 4G / 5G radio frequency transceiver unit RRU adjust the frequency of the clock chip by acquiring the time deviation, so as to achieve precise clock synchronization and wireless air interface synchronization.

[0021] It should be noted that the method for clock synchronization in this invention adds time information T1, indicating the time when each packet is sent from the IP network switch BBU, to the custom protocol. The 4G / 5G radio transceiver unit RRU unpacks the packets according to the specific time information and records the time T2 when the packets are received. Then, the unpacked time information T1 is subtracted from the time T2 when the 4G / 5G radio transceiver unit RRU receives the packets to filter out time information ΔT that causes excessive transmission delay fluctuations in the entire system. Finally, all filtered time information ΔT within 100ms is averaged and sent to the software program. The software program adjusts the frequency of the clock chip based on the obtained deviation to achieve precise clock synchronization and wireless air interface synchronization.

[0022] To better understand the technical solutions described in the embodiments of this utility model, the following detailed explanation is provided:

[0023] The transmission system described in this application includes a DOCSIS system 10 and a 4G / 5G communication system 20 integrated with the DOCSIS system 10. The DOCSIS system 10 mainly consists of three parts: a front-end 11, a distribution network 12, and a back-end 13. The front-end 11 comprises a server, a router, and a CMTS module. The server primarily provides various services, such as internet access and video-on-demand. The router mainly connects to the CMTS module and routes network traffic to other networks. The CMTS module mainly manages and communicates with the CM modules. The distribution network 12 consists of an HFC (Hybrid Fiber Coaxial Cable) module and an amplifier. The HFC module transmits data signals and connects the front-end CMTS module to the CM modules of various users. The amplifier enhances signal strength to ensure signal transmission to distant users. The back-end 13 consists of CM modules and user equipment. The CM modules are installed in users' homes or businesses and communicate with the CMTS module via coaxial cable to achieve network access. User equipment connects to the internet through the CM modules to achieve network access. The 4G / 5G communication system 20 includes a core network (5GC / RAN) 21, a 4G / 5G wireless baseband processing unit (BBU) 22, and an IP network switch 23 added to the front end 11 of the DOCSIS system.

[0024] Therefore, the technical solution of this utility model includes a DOCSIS system and a 4G / 5G communication system integrated with the DOCSIS system. The DOCSIS system includes a front-end, a distribution network connected to the front-end, and a back-end connected to the distribution network. The front-end consists of a server, a router connected to the server, and a CMTS module connected to the router. The 4G / 5G communication system includes a core network, a 4G / 5G wireless baseband processing unit connected to the core network, and an IP network switch connected to the 4G / 5G wireless baseband processing unit. The IP network switch is connected to the router of the front-end. Therefore, this utility model not only significantly reduces the deployment cost of 4G / 5G systems in home scenarios by transmitting 4G / 5G signals through an existing DOCSIS system, but also adds 4G / 5G services to traditional home broadband lines, achieving wired and wireless multi-network integration, multi-service integration, and solving the problem of weak indoor signal coverage.

[0025] The foregoing has provided a detailed description of a timing and transmission system for 4G / 5G and fixed-line convergence based on a fiber optic cable hybrid network, as provided in this application. The various embodiments in the specification are described in a progressive manner, with each embodiment focusing on its differences from other embodiments. Similar or identical parts between embodiments can be referred to interchangeably. For the apparatus disclosed in the embodiments, since it corresponds to the method disclosed in the embodiments, the description is relatively simple; relevant parts can be referred to in the method section. It should be noted that those skilled in the art can make several improvements and modifications to this application without departing from the principles of this application, and these improvements and modifications also fall within the protection scope of the claims of this application.

[0026] It should be noted that, in this document, the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or terminal that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such a process, method, article, or terminal. Unless otherwise specified, an element defined by the phrase "comprising one..." does not exclude the presence of other identical elements in the process, method, article, or terminal that includes that element.

[0027] Finally, it should be noted that the above preferred embodiments are only used to illustrate the technical solution of this utility model and are not intended to limit it. Although the utility model has been described in detail through the above preferred embodiments, those skilled in the art should understand that various changes can be made to it in form and detail without departing from the scope defined by the claims of this utility model.

Claims

1. Transmission system for 4G / 5G and fixed network convergence based on hybrid optical fiber cable network, characterized in that, The transmission system comprises a DOCSIS system and a 4G / 5G communication system integrated with the DOCSIS system, the DOCSIS system comprises a front end, a distribution network connected with the front end and a back end connected with the distribution network, the front end is composed of a server, a router connected with the server and a CMTS module connected with the router; the 4G / 5G communication system comprises a core network, a 4G / 5G wireless baseband processing unit connected with the core network and an IP network switch connected with the 4G / 5G wireless baseband processing unit, and the IP network switch is connected with the router of the front end. 2.The transmission system based on the hybrid network of optical fiber cable, 4G / 5G and fixed network fusion of claim 1, wherein, The distribution network is composed of an HFC module for transmitting data signals and connecting the CMTS module of the front end with the CM module of each back end and an amplifier for enhancing signal strength and ensuring that signals can be transmitted to each user terminal. 3.The transmission system based on the hybrid network of optical fiber cable, 4G / 5G and fixed network fusion of claim 1, wherein, The back end comprises a CM module and user equipment, wherein the CM module communicates with the CMTS module through the distribution network. 4.The transmission system based on the hybrid network of optical fiber cable, 4G / 5G and fixed network fusion according to claim 3, characterized in that, The back end further comprises a 4G / 5G radio frequency transceiver unit connected with the CM module for mobile phone access to the DOCSIS system. 5.The transmission system based on the hybrid network of optical fiber cable for 4G / 5G and fixed network convergence according to claim 1, wherein, The 4G / 5G wireless baseband processing unit and the 4G / 5G radio frequency transceiver unit adjust the frequency of the clock chip by obtaining the time offset to realize precise clock synchronization and wireless air interface synchronization.

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