At the “5G Gigabit Industry Forum” held a few days ago, Wu Hequan, an academician of the Chinese Academy of Engineering, said that 5G not only adds alternative access modes to the industrial Internet, but also integrates new-generation information technology on the basis of 5G industrial modules. The gateway will promote the IP, cloud and intelligence of the industrial Internet, realize the seamless integration of IT/OT, and open up a new space for 5G industrial applications.

“The characteristics of 5G to B should be developed, and the new structure of 5G enterprise network + new industrial gateway should be used to build a new pattern of industrial Internet, so as to enhance my country’s self-reliance and self-improvement in the development of industrial Internet, effectively promote industrial digital transformation, and enable high-quality industrial development.”

5G+Industrial Internet is a rare opportunity for enterprise network upgrade

Wu Hequan said that the intranet of large and medium-sized enterprises is usually not a blank sheet of paper. The original enterprise network does not meet the requirements of modern enterprises. The main manifestations are: multiple layers and different inter-layer protocols; OT coexistence brings integration problems; a large number of industrial control products are imported, the protocol is not open, and lacks independent controllability; it does not meet the needs of higher bandwidth and stricter delay; and emerging cloud computing, intelligent networking, artificial intelligence, New generation information technologies such as blockchain and IPv6 are difficult to integrate.

The development of a new type of industrial control gateway to promote the flat IP of the enterprise network requires the development of a new 5G industrial CPE + Hongmeng OS that integrates a new generation of IT technology to transform the enterprise intranet, and at the same time embed OPC-UA compatible with the existing enterprise network.

“Therefore, 5G + Industrial Internet is a rare opportunity for enterprise network upgrades. It is necessary to develop a 5G to B architecture that is very suitable for the characteristics of enterprise networks, and build a new pattern of industrial Internet.”

To develop a network architecture that adapts to the characteristics of the enterprise intranet

It is understood that the network architecture requirements of 5G to C: terminals are connected to the base station in star form; only the Internet of Vehicles supports D2D; the base station only handles the physical layer; the core network control platform is far away from the terminal; Handover, roaming, and billing; the advantages of slicing are reflected in the core network; multi-base station collaboration can reduce the dependence on the security of a single base station, and multi-base station collaboration supports high-precision positioning.

The network architecture of 5G to B requires: star or tree access (including D2D relay) or wireless bus; D2D may become a more common mode (signaling through the core network); cloud base station (or BBU), can have UPF and some UGC functions can be moved and integrated with edge computing to shorten the delay; the core network is lowered to the enterprise, and the main business is terminated in the workshop; the uplink service requires larger bandwidth and is sensitive to delay and certainty; no need to consider roaming and There are very few handovers, and more attention is paid to safety and high reliability. If necessary, spectrum and bandwidth utilization can be sacrificed to ensure safety and reliability. The workshop can only have a single base station, but indoor precise positioning is still required.

“In particular, the 5G to C network architecture can be used for corporate extranets and some corporate intranets, but 5G to C is not a reasonable model for large and medium-sized enterprise intranets. 5G to B requires a lightweight network architecture, and 5G private networks or logical slices on public networks can be used The new architecture of 5G to B is supported in a new way.” Wu Hequan said, “Therefore, it is necessary to develop a network architecture that adapts to the characteristics of the enterprise intranet.”

Enterprise networks have special requirements for 5G

Compared with the public network, enterprise application scenarios have many particularities. It is necessary to develop a new 5G to B architecture in a targeted manner to support the flattening of enterprise networks and applications with large bandwidth, low latency, high reliability, and high security.

In particular, compared with public networks, enterprise networks have special performance requirements, including Gigabit transmission and large uplink, which need to be supported by 5G air interface and terminal technology innovation.

Therefore, compared with public networks, enterprise networks have special requirements for 5G. According to Wu Hequan, in terms of downlink ultra-broadband, the enterprise network needs to achieve a large uplink of 1Gbps. The network side senses the downlink status, offsets uplink and downlink interference, flexibly configures uplink and downlink bandwidth, and supports full-duplex and terminal half-duplex.

In terms of air interface low latency, the enterprise network requires end-to-end full-link low latency of 4ms, and at the same time requires support for high bandwidth, and networking L4 requires 1-10ms, flat network, station integration of some functions of the core network, and local data communication and NR-Sidelink is D2D.

In terms of multi-base station fine positioning, the enterprise network requires centimeter-level and ms-level single-base station fine positioning, setting up multiple AP points, and setting up positioning reference points and sign signals within the enterprise.

In terms of high reliability, enterprise networks need high reliability and high security, and hope to avoid operation and maintenance. The public network uses multiple base stations to avoid the impact of a single base station failure, but a workshop may only have a single base station. Enterprise networks can adopt multi-channel redundancy and multiple AP points in cells to avoid homogenization of channel performance, reserve dedicated carrier frequencies for control/safety channels and high-reliability services or set up always-on slicing.

“The enterprise network has the requirement of Gigabit uplink: it is necessary to increase the uplink bandwidth capability: the current 5G TDD mainstream time slot ratio is 8D2U and 7D3U, and the peak uplink capacity of 5G is insufficient; uplink carrier aggregation CA, such as adding low-frequency channels on the basis of 3.5GHz Perform uplink, allowing traffic to be carried on high-frequency + low-frequency bands at the same time; decouple SUL for uplink and downlink, add low-frequency for uplink in places where there is no uplink coverage, high-frequency 5G downlink, low-frequency 5G uplink; super uplink, TDD and FDD collaboration, high-frequency and low-frequency complementarity, time domain and frequency domain aggregation, bandwidth increased by 20%, delay reduced by 30%.” Wu Hequan emphasized.