Challenges in 5G Era
With the advent of the 5G Era we will see a large increase in the number of new applications in combination with an increase in user experience expectations, all of which will require more qualified transport networks. Traditional networks face a revolution including but not limited to network structure reconfiguration, device upgrade and service improvement. Additionally, operators will be seriously challenged in the following aspects:
- Super low latency: In 5G ultra-reliable and low latency communication (uRLLC) application scenarios, the end-to-end latency of the services including automatic drive and industrial automation and control is 1ms, which means the latency of the transport network is merely 150μs.
- Super large bandwidth: As per the 5G standards, the bandwidth that the user employed to enjoy the services, such as big video and AR/VR, in a 5G enhanced mobile broadband (eMBB) scenario it is 0.1~1Gbps. And the peak value can be up to 10Gbps.
- Network slicing: Different 5G services have different requirements for the network. It would be too expensive, wasteful and inefficient to provide well-rounded resources for all sorts of services. The transport network should be capable of offering differentiated network resources as per different service features to achieve maximum network resource utilization and decreased costs.
Highlights of ZTE 5G Flexhaul Solution
In the ZTE 5G Flexhaul solution, small footprint devices integrating IP and optical features are deployed on the access layer to implement unified fronthaul and backhaul transport. The configuration shows a lot of merits, for example, small size, low costs, big bandwidth and easy to capacity expansion.
On the aggregation and core layer of the network, the IP+Optical Synergy Solution is employed on the basis of the existing physical devices. Instead of using overlaid IP and optical layers, the SDN/NFV is equipped to implement unified planning, scheduling, OAM and optimization.
Furthermore, based on the SDN technology, the 5G Flexhaul solution supports the network slicing service, consequently a major resource pool covering the entire transport network comes into being to provide flexible on-demand service scheduling and maximum resource utilization. As per different service application scenarios, the 5G Flexhaul solution offers elastic network services, so that the network performance (including bandwidth and latency), OAM and resource optimization are essentially improved.
Benefits of ZTE 5G Flexhaul Solution
Flexible bandwidth: The solution provides elastic bandwidth to comply with all sorts of application scenarios. The bandwidth of single access node can be up to 100G. While, a single access ring is capable of providing Tbps bandwidth. Due to superior scalability, the IP+Optical integrated devices enable easier capacity expansion. Also, without affecting the existing services running on the access ring, the new site can distribute new wavelength flexibly.
Flexible Latency: The transport devices provide ordinary and fast forwarding modes at the same time. Low-latency services use fast forwarding mode to decrease the processing latency of the single node to 3~5μs. The intermediate node uses optical bypass technology to make the single node latency down to 30ns.
Flexible Route: Service routes are tunable as per the real use of the network bandwidth. This provides an effective way to further enhance bandwidth utilization and relieve the pressure of tidal effect. Without requiring configuration plans in advance, the dynamic service routing between different base stations makes the frequent inter-base station communication more flexible in the 5G Era.
Flexible resource scheduling: The network resources can be scheduled dynamically according to different service features. Either super large bandwidth or ultra low latency is provided to satisfy the service demands while the OPEX for OAM can be saved by 30%.