Content for TS 22.261 Word version: 19.6.0

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6.16 Markets requiring minimal service levels 6.16.1 Description 6.16.2 Requirements 6.17 Extreme long range coverage in low density areas 6.17.1 Description 6.17.2 Requirements 6.18 Multi-network connectivity and service delivery across operators 6.18.1 Description 6.18.2 Requirements 6.19 3GPP access network selection 6.19.1 Description 6.19.2 Requirements 6.20 eV2X aspects 6.20.1 Description 6.20.2 Requirements 6.21 NG-RAN Sharing 6.21.1 Description 6.21.2 Requirements
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6.16 Markets requiring minimal service levels p. 43

6.16.1 Description p. 43

A key aspect of 5G system flexibility is the ability to support both the very high-end markets as well as very low-end markets. Some systems will be deployed in areas where there are constraints on energy resources (e.g. sporadic access to power) and lower end user expectations for availability, reliability, and data rates. In such cases, the system needs additional flexibility to adapt power consumption needs based on fluctuations in power availability. The system should be efficient in order to provide essential services in harsh environments (e.g. far remote rural areas, very large territories) while taking into account the local constraints (adapting resources consumptions to long distances, dealing with variable conditions and possibly disconnections). Content delivery should be optimized in order to reduce constraints on transport networks, on low-end UEs (e.g. small screen, limited energy consumption), variable network conditions, and client profiles.

6.16.2 Requirements p. 43

In constrained circumstances (e.g. reduced power supply), the 5G system shall be able to support a minimal user experience (e.g. user experienced data rate of [100] kbit/s, E2E latency of 50 ms, lower availability of the network of 95%).

The 5G system shall support centralized automation and management of the network in order to reduce local management tasks.

The 5G system shall support a mechanism to reduce data transfer rate at the cell edge for very large coverage area (e.g. 100 kbit/s for more than 100 km cell coverage, 1 Mbit/s for 100 km cell coverage).

The 5G system shall be able to give priority to services (e.g. e-Health) when resources are limited.

6.17 Extreme long range coverage in low density areas p. 43

6.17.1 Description p. 43

A fully connected society is expected in the near future. The network access everywhere over long distances (e.g. at remote rural areas or at sea) including both humans and machines need to be supported.

6.17.2 Requirements p. 43

The 5G system shall support the extreme long-range coverage (up to 100 km) in low density areas (up to 2 user/km2).

The 5G system shall support a minimum user throughput of 1 Mbit/s on DL and 100 kbit/s on UL at the edge of coverage.

The 5G system shall support a minimum cell throughput capacity of 10 Mbit/s/cell on DL (based on an assumption of 1 GB/month/sub).

The 5G system shall support a maximum of [400] ms E2E latency for voice services at the edge of coverage.

6.18 Multi-network connectivity and service delivery across operators |R16| p. 44

6.18.1 Description p. 44

Given the multitude of use cases for new verticals and services, each operator, based on its business model, can deploy a network serving only a subset of the vertical industries and services. However, this should not prevent an end-user from accessing all new services and capabilities that will be accessible via 5G systems. To provide a better user experience for their subscribers with UEs capable of simultaneous network access, network operators could contemplate a variety of sharing business models and partnership with other network and service providers to enable its subscribers to access all services via multiple networks simultaneously, and with minimum interruption when moving.

6.18.2 Requirements p. 44

The 5G system shall enable users to obtain services from more than one network simultaneously on an on-demand basis.

For a user with a single operator subscription, the use of multiple serving networks operated by different operators shall be under the control of the home operator.

When a service is offered by multiple operators, the 5G system shall be able to maintain service continuity with minimum service interruption when the serving network is changed to a different serving network operated by a different operator.

In the event of the same service being offered by multiple operators, unless directed by the home operator's network, the UE shall be prioritized to receive subscribed services from the home operator's network.

6.19 3GPP access network selection p. 44

6.19.1 Description p. 44

The 5G system will support the concept of "network slices" where different NG-RANs potentially are connected to network slices of different SSTs. A 5G UE can provide assistance information (e.g. SST) to enable the network to select one or more network slices. A 5G system is foreseen to support one or more SSTs, but possibly not all existing SSTs.

A 5G network operator controls and is responsible for what SSTs that should be available to a specific UE and subscription combination, based on associated subscription type, network operator policies, network capabilities and UE capabilities. The network operator can populate the Operator Controlled PLMN Selector list with associated access technology identifiers, stored in the 5G UE, with the PLMN/RAT combinations enabling access to the SSTs that are available to the 5G UE with associated subscription.

The UE uses the list of PLMN/RAT combinations for PLMN selection, if available, typically during roaming situations. In non-roaming situations, the UE and subscription combination typically matches the HPLMN/EHPLMN capabilities and policies, from a SST perspective. That is, a 5G UE accessing its HPLMN/EHPLMN should be able to access SSTs according to UE capabilities and the related subscription.

Optionally, a 5G system supports, subject to operator policies, a User Controlled PLMN Selector list that enables the 5G UE user to specify preferred PLMNs with associated access technology identifier in priority order. The user can obtain information about suitable PLMN/RAT combination that would support services preferred by the user.

6.19.2 Requirements p. 45

The following set of requirements complement the requirements listed in clause 3.2 of TS 22.011.

The 5G system shall support selection among any available PLMN/RAT combinations, identified through their respective PLMN identifier and Radio Access Technology identifier, in a prioritised order. The priority order may, subject to operator policies, be provisioned in an Operator Controlled PLMN Selector lists with associated RAT identifiers, stored in the 5G UE.

The 5G system shall support, subject to operator policies, a User Controlled PLMN Selector list stored in the 5G UE, allowing the UE user to specify preferred PLMNs with associated RAT identifier in priority order.

6.20 eV2X aspects p. 45

6.20.1 Description p. 45

The 3GPP system is expected to support various enhanced V2X scenarios.

Vehicles Platooning enables the vehicles to dynamically form a group travelling together. All the vehicles in the platoon receive periodic data from the leading vehicle, in order to carry on platoon operations. This information allows the distance between vehicles to become extremely small, i.e. the gap distance translated to time can be very low (sub second). Platooning applications can allow the vehicles following to be autonomously driven.

Advanced Driving enables semi-automated or fully-automated driving. Longer inter-vehicle distance is assumed. Each vehicle and/or RSU shares data obtained from its local sensors with vehicles in proximity, thus allowing vehicles to coordinate their trajectories or manoeuvres. In addition, each vehicle shares its driving intention with vehicles in proximity. The benefits of this use case group are safer traveling, collision avoidance, and improved traffic efficiency.

Extended Sensors enables the exchange of raw or processed data gathered through local sensors or live video data among vehicles, Road Site Units, UEs of pedestrians and V2X application servers. The vehicles can enhance the perception of their environment beyond what their own sensors can detect and have a more holistic view of the local situation.

Remote Driving enables a remote driver or a V2X application to operate a remote vehicle for those passengers who cannot drive themselves or a remote vehicle located in dangerous environments. For a case where variation is limited and routes are predictable, such as public transportation, driving based on cloud computing can be used. In addition, access to cloud-based back-end service platform can be considered for this use case group.

6.20.2 Requirements p. 45

The 3GPP system supports the transport of messages with different performance requirements to support V2X scenarios. The associated requirements are described in eV2X TS 22.186.

6.21 NG-RAN Sharing p. 45

6.21.1 Description p. 45

The increased density of access nodes needed to meet future performance objectives poses considerable challenges in deployment and acquiring spectrum and antenna locations. RAN sharing is seen as a technical solution to these issues.

In RAN Sharing operations, NG-RAN resources can be used by multiple network operators. Indirect Network Sharingis one of the possible sharing methods.

During NG-RAN sharing, the security and privacy of shared networks, non-shared networks, and subscribers need to be maintained without negative effects. Especially in the case of Indirect Network Sharing, where the involvement of the core network of the hosting operator e.g. for signalling exchange between the users and the core network of the participating operator could cause exposure of the subscriber's information to the hosting network, an extra scrutiny of the security mechanism is expected to avoid sharing the information that is not needed for the Indirect Network Sharing operation (e.g. network topology) and protect the information that is needed for the Indirect Network Sharing operation between the hosting operator and the participating operator.

6.21.2 Requirements p. 46

6.21.2.1 General |R19| p. 46

Requirements related to NG-RAN sharing are described in TS 22.101, mainly in clause 28.2.

A 5G satellite access network shall support NG-RAN sharing.

6.21.2.2 Indirect network sharing |R19| p. 46

The 5G system shall be able to support Indirect Network Sharing between the Shared NG-RAN and one or more Participating NG-RAN Operators' core networks, by means of the connection being routed through the Hosting NG-RAN Operator's core network.

The following requirements apply to Indirect Network Sharing:

Indirect Network Sharing shall be transparent to the user.

The following existing service requirements related to network sharing in TS 22.101 apply:

Subject to the agreement between the hosting and participating operator, the 5G system shall support a means to enable a UE of the Participating NG-RAN Operator to:

access their subscribed PLMN services when accessing a Shared NG-RAN, and/or,
obtain its subscribed services, including Hosted Services, of participating operator via a Shared NG-RAN.

Based on operator policy, the 5G system shall support a mechanism to enable an authorized UE with a subscription to a Participating Operator to select and access a Shared NG-RAN.

Based on operator policy, the 5G system shall support access control for an authorized UE accessing a Shared NG-RAN and be able to apply differentiated access control for different Shared NG-RANs when more than one Shared NG-RAN are available for the Participating Operator to choose from.

Based on operator policy, the 5G system shall enable the Participating Operator to provide steering information in order to assist a UE with access network selection amongst the Hosting Operator's available Shared RAN(s).

The 5G system shall support service continuity for UEs that are moving between different Shared NG-RANs and/or between a Shared NG-RAN and a non-Shared NG-RAN networks.

The 5G system shall be able to provide a UE accessing a Shared NG-RAN network with positioning service in compliance with regulatory requirements.

Subject to regulatory requirements and mutual agreement between the participating operators and the hosting operator, the requirements to support regulatory services, e.g., PWS or emergency calls apply to Indirect Network Sharing.

In case of Indirect Network Sharing and subject to agreement between operators the 5G system shall enable the Shared NG-RAN of a hosting operator to provide services for inbound roaming users.

The 5G core network shall be able to support collection of charging information associated with a UE accessing a Shared NG-RAN using Indirect Network Sharing, which refers to the resource usage of hosting operator's core network.