5G network slicing progress report with a look ahead to 2025
The “true” version of 5G is 5G standalone (SA), which eliminates the need for a 4G anchor network and supports all 3GPP defined 5G functions, like 5G Security, Voice over 5G New Radio (VoNR) and network slicing. As we’ve noted for years, 5G SA has proven difficult to deploy, partially because there are no standards for implementation – only 3GPP 5G Architecture specs (rubber stamped as ETSI standards, but never submitted to the ITU for consideration as one or more ITU-T recommendations).
Network slicing is only possible with a 5G SA core network. Operators which have deployd 5G SA are using and planning to use 5G network slices for a variety of use cases, including: a priority slice for first responders, support financial or mission-critical applications, or offer broadcasters a dedicated fast 5G layer to transfer video from cameras to production teams at sporting or other live events.
Image Credit: SDx Central
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In the U.S., T-Mobile is the only major carrier offering 5G SA and has been moving forward with network slicing deployments. Verizon said recently that its 5G network slicing public safety field demonstration in Phoenix, Arizona, is operational but still in trials. AT&T has tested prioritized access to its network, but so far has not yet provided a 5G SA network to support network slicing . That’s despite outsourcing development to Microsoft Azure cloud platform in June 2021.
T-Mobile recently launched “T-Priority,” a network slice for first responders supported by the network operator’s 5G SA core network. The wireless telco told regulators at the end of 2023:
“Network slicing involves creating customized, software-defined, virtual networks – or ‘slices’ – that are each logically separated and individually optimized to meet the specific needs of each application. Within a slice, network functions are defined in software and customized to the use case supported by that slice. For example, network slicing allows providers to use a single 5G network to deliver high-intensity network resources to support a small number of robots on a factory floor, while at the same time delivering low-intensity network resources to a very large number of meter-reading sensors on a utility network.”
Overseas, BT, Orange Belgium, Singtel, China Telecom, Reliance Jio, and Telia Finland have deployed network slicing, among other 5G carriers. Singtel’s app-based network slicing is designed to improve the performance of consumer and enterprise applications.
Nokia recently said it tested a network slicing application with network operator Liberty Global and Belgian shipping company Seafar. Nokia said the shipping company could use its API platform to purchase an ultra-low latency slice of Liberty Global’s Telenet 5G standalone network to maneuver Seafar’s ships through ports without having to slow down.
“Slicing will be critical to enabling enterprise cases and providing network solutions for many use cases for which a stand-alone purpose-built network is not feasible,” Nokia stated in a February meeting between CEO Pekka Lundmark and a variety of top FCC officials, including FCC Chairwoman Jessica Rosenworcel.
The GSMA, which is NOT a standards development organization, launched its “Open Gateway” campaign last year. Earlier this year the group said that 47 mobile operators representing 239 mobile networks and 65% of wireless connections around the world have signed up. Currently, GSMA and its partners are developing a wide range of APIs for text messaging, location information, billing, quality of service – and network slicing among other applications.
Several analysts believe that network slicing will see more growth next year:
“There will be definitely more rollouts of network slicing capabilities as 5G SA networks mature, and as 5G NSA networks move to SA in the next few years,” AvidThink principal analyst Roy Chua said in an email. “Using a network slice for privacy/security/isolation or for ensuring QoS (live broadcasts, sporting events, emergency and disaster support) will likely continue.”
Lead analyst at Techsponential Avi Greengart agreed that more network slicing deployments will happen in the coming year as more operators upgrade to 5G SA. “Network slicing has been a long-touted feature of 5G, and we’re starting to see it used for large venues (ex: sports stadiums) and public safety,” he told Fierce Network. Greengart warned that slicing is not a panacea for private networks or Wi-Fi.
“I do think that network slicing will be operator specific,” noted neXt Curve executive analyst Leonard Lee. “There is still the open question of what the generally monetizable services will be and the scenarios that make them viable. This, each operator will be answering for themselves on their own timeline. For outside observers, it will be like watching a kettle boil,” he said, adding a note of caution.
References:
https://www.lightreading.com/network-automation/2025-preview-network-slicing-gets-real
https://www.fierce-network.com/wireless/network-slicing-slides-more-vigorously-2025
https://www.sdxcentral.com/5g/definitions/key-elements-5g-network/5g-network-slicing/