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Content for  TR 22.858  Word version:  18.2.0

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5.5  Use Case on efficient routing for UE-to-UE communications via residential gatewayWord‑p. 17

5.5.1  DescriptionWord‑p. 17

This use case assumes that multiple Premises Radio Access Stations were already deployed in individual rooms behind an Evolved Residential Gateway, in order to provide better coverage at home. This use case is to enable efficient routing for the communications between two UEs via the Evolved Residential Gateway.
Copy of original 3GPP image for 3GPP TS 22.858, Fig. 5.5.1-1: efficient routing for UE-to-UE communications via residential gateway
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5.5.2  Pre-ConditionsWord‑p. 17

The following pre-conditions and assumptions apply to this use case:
  • Multiple Premises Radio Access Stations were deployed in individual rooms inside a residential home.
  • The Premises Radio Access Station provides cellular access to UEs
  • The Premises Radio Access Station is connected to an Evolved Residential Gateway via wireline or wireless link
  • The Evolved Residential Gateway is connected to the same 5G system (and has a subscription to the same 5G system) as the Premises Radio Access Station belongs to.
In particular, one Premises Radio Access Station is deployed at the attic and another one is deployed at the basement. The connections between the Premises Radio Access Stations and the Evolved Residential Gateway could have multiple options, e.g., fiber, WiFi, or 3GPP licensed spectrum.
A security sensor is deployed at the basement which is capable of detecting smoke or fire. The sensor having a SIM is a 3GPP-capable UE which is connecting to the Premises Radio Access Station in the basement.
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5.5.3  Service FlowsWord‑p. 17

Alice is working alone at home, staying in her office in the attic. Her smartphone is connecting to the Premises Radio Access Station deployed in the attic.
Suddenly there is a fire in the basement.
The security sensor detects the fire and smoke, and then immediately sends an alarm to Alice's smartphone.
The alarm message first reaches the Evolved Residential Gateway via the Premises Radio Access Station in the basement, and then routed by the Evolved Residential Gateway to Alice smartphone via the Premises Radio Access Station in the attic.
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5.5.4  Post-ConditionsWord‑p. 18

Alice reads the alarm message from her smartphone. After double-check the situations in the basement, Alice makes the call to the fire policy.

5.5.5  Existing features partly or fully covering the use case functionalityWord‑p. 18

The 5G system shall support on-demand establishment of UE to UE, multicast, and broadcast private communication between members UEs of the same 5G LAN-VN. Multiple types of data communication shall be supported, at least IP and Ethernet.
3GPP TS 22.261 specifies the requirement to support E2E QoS for a service, however, the existing requirement only consider QoS in the access networks, backhaul, core network and network to network interconnect. The QoS between UE, PRAS and eRG is not covered yet.
3GPP TS 22.261 specifies the requirements for routing efficiency within the 5GC, e.g., private communication for 5G LAN-type service. However, the efficient routing on eRG is not covered yet.
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5.5.6  Potential New Requirements needed to support the use caseWord‑p. 18

[PR. 5.5.6-001]
The 5G system shall be able to provide QoS control for the communication path between a UE and an Evolved Residential Gateway via a Premises Radio Access Station.
[PR. 5.5.6-002]
Subject to regulatory requirements and operator policy, the 5G system shall support an efficient data path through an Evolved Residential Gateway for intra-CPN data traffic to or from a UE. routing efficiency for data traffic between two UEs through an Evolved Residential Gateway.
[PR. 5.5.6-003]
The 5G system shall support a mechanism to minimize the security impact on any PLMN or broadband access network when using an Evolved Residential Gateway.
[PR. 5.5.6-004]
The 5G system shall support a mechanism to minimize the security impact on the UE when using an Evolved Residential Gateway.
[PR. 5.5.6-005]
The 5G system shall enable the network operator associated with an Evolved Residential Gateway to control the security policy of an Evolved Residential Gateway.
[PR 5.5.6-006]
The 5G system shall ensure an Evolved Residential Gateway does not compromise user privacy for UEs that are using the Evolved Residential Gateway, including communication confidentiality, location privacy and identity protection.
[PR. 5.5.6-007]
The 5G system shall support QoS control for intra-CPN data traffic between two UEs through an Evolved Residential Gateway.
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5.6  Use case on E2E QoS monitoringWord‑p. 18

5.6.1  DescriptionWord‑p. 18

This use case assumes that multiple PRASs were already deployed in individual rooms behind an eRG, in order to provide better cellular coverage at home. This use case is to enable E2E QoS monitoring for the whole communication path, i.e., from/to a UE to/from the 5GC via a PRAS and an eRG.
Copy of original 3GPP image for 3GPP TS 22.858, Fig. 5.6.1-1: E2E QoS monitoring
Figure 5.6.1-1: E2E QoS monitoring
(⇒ copy of original 3GPP image)
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5.6.2  Pre-ConditionsWord‑p. 19

The following pre-conditions and assumptions apply to this use case:
  • Multiple Premises Radio Access Stations were deployed in individual rooms inside a residential home.
  • The Premises Radio Access Station provides cellular access to UEs
  • The Premises Radio Access Station is connected to an Evolved Residential Gateway via wireline or wireless link
  • The Premises Radio Access Station is connected to the same 5G system (and has a subscription to the same 5G system) as the Premises Radio Access Station belongs to.
In particular, a Premises Radio Access Station is deployed in the living room.
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5.6.3  Service FlowsWord‑p. 19

Alice sits in the living room and her smartphone connects to the Premises Radio Access Station.
Alice is watching an interesting video on her smartphone. The smartphone downloads the video content in real time from the video application server in the cloud.
After a while, the download speed becomes slow and the video is stuck.
Alice makes a call to the network operator and reports the downgrade of the network performance.
The network operator checks the E2E QoS status and identifies there is heavy interference on the Premises Radio Access Station. The network operator reconfigures the Premises Radio Access Station and recovers the E2E QoS.
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5.6.4  Post-ConditionsWord‑p. 19

The download speed recovers normal and Alice could continue enjoy the video.

5.6.5  Existing features partly or fully covering the use case functionalityWord‑p. 19

3GPP TS 22.261 Section 6.23.2 "QoS monitoring".
The 5G system shall be able to provide information that identifies the type and the location of a communication error for the Premises Radio Access Station (e.g. the ID of this Premises Radio Access Station).

5.6.6  Potential New Requirements needed to support the use caseWord‑p. 20

[PR. 5.6.6-001]
The 5G system shall provide a mechanism for supporting real time E2E QoS monitoring for the data traffic path (i.e., from/to a UE to/from the 5GC via a Premises Radio Access Station and a Evolved Residential Gateway).

5.7  Provisioning evolved residential gateways and Premises Radio Access StationsWord‑p. 20

5.7.1  DescriptionWord‑p. 20

The use case illustrates how an evolved residential gateway or a Premises Radio Access Station can be connected and automatically provisioned to the operator's 5G network.

5.7.2  Pre-conditionsWord‑p. 20

Ali has a home connectivity service subscription and a 5G subscription on his mobile phone with Network Operator Vanilla.
Ali purchased an evolved residential gateway and one (or more) Premises Radio Access Stations, which were not provided by the operator.
Ali is at home and has his mobile phone nearby.

5.7.3  Service FlowsWord‑p. 20

Step 1.
Ali switches both the evolved residential gateway and Premises Radio Access Station on for the first time.
Step 2.
Ali logs on to his account on Vanilla's portal to add both devices to his Vanilla account and to enable the devices in his home.
Step 3.
Vanilla's 5G core network provisions both the evolved residential gateway and Premises Radio Access Station. Once this process is complete, both the evolved residential gateway and Premises Radio Access Station are successfully connected to Vanilla's core network and are now fully operational.
Step 4.
Ali can now connect his TV to the Premises Radio Access Station in order to stream a movie.
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5.7.4  Post-conditionsWord‑p. 20

The evolved residential gateway and Premises Radio Access Station have been provisioned automatically with minimum user interaction.

5.7.5  Existing features partly or fully covering the use case functionalityWord‑p. 20

There are existing features that support remote provisioning, such as via support of (un-)trusted non-3GPP access TS 23.501. Remote provisioning of H(e)NBs is defined in TS 22.220, which includes verification and configuration of H(e)NB identity, initial OA&M provisioning.

5.7.6  Potential New Requirements needed to support the use caseWord‑p. 20

[PR 5.7.6-001]
The 5G system shall provide mechanisms for the network operator or an Authorised Administrator (e.g. a homeowner) to trigger remote provisioning of evolved residential gateways and for the network operator to perform remote provisioning of eRGs, which includes verification and configuration of evolved residential gateway identity and initial OA&M provisioning.
[PR 5.7.6-002]
The 5G system shall provide mechanisms for the network operator or an Authorised Administrator (e.g. a homeowner) to trigger remote provisioning of Premises Radio Access Stations and for the network operator to perform remote provisioning of PRASs, which includes verification and configuration of Premises Radio Access Station identity and initial OA&M provisioning.
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5.8  Use case on 5G LAN scalabilityWord‑p. 21

5.8.1  DescriptionWord‑p. 21

5G houses will aim to connect a diverse quantity of devices ranging from multimedia entertainment, laptops, tables to security cameras. This use case presents a house where all the devices are 5G devices. These devices belong to different 5GL LAN-VNs deployed at the house.
  1. Basis 5G LAN-VN: for the TV, tablet, phones, other multimedia and entertainment devices.
  2. Work 5G LAN-VN.
  3. House security 5G-LAN VN: including security cameras and other security systems.
  4. Home control/automation 5G LAN-VN.
Different family members have access to the different 5G LAN-VN. While all the family members have access to the basis and home control 5G LAN-VN, only the mom has access to the work 5G LAN-VN who connect her to her office. Dad and mom are the only ones with access to both house security 5G LAN-VN.
Nevertheless, these devices may have different owners or users. The owner of the 5GLAN may decide that different users have access to different devices in a configurable way.
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5.8.2  Pre-conditionsWord‑p. 21

The following pre-conditions and assumptions apply to this use case:
  • All devices at the house are 5G devices.
  • A premises radio access station is deployed inside a residential home.
  • The premises radio access station provides access to the 5G system (e.g not local IP access)
  • UEs using the premises radio access station have individual subscriptions to access the 5G system.
  • The premises radio access station is connected to a evolved Residential Gateway (eRG)
  • The eRG is connected to the same 5G system (and has a subscription to the same 5G system) as the premises radio access station belongs to.
Multiple premises radio access stations are deployed in the home and connected to the evolved residential gateway.
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5.8.3  Service FlowsWord‑p. 21

Teenagers Oliver and Scott are avid gamers. They get together in the games room in the basement of Scott's house. While they are playing, they heard weird noises from the outside. Scott access to the home control 5G-LAN VN to switch on the lights and check inside. Scott cannot the security cameras and alarm system and he calls his father to check that everything is ok in the different entrances of the house and the garden.
After checking that everything is ok Scott's father decides to Scott is old enough, so he picks up his phone and he configures the system so Scottt has now access and can access the security cameras.
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5.8.4  Post-conditionsWord‑p. 21

Scottt has now access and can access the security cameras.

5.8.5  Existing features partly or fully covering the use case functionalityWord‑p. 22

A 5G system shall support 5G LAN-VNs with member UEs numbering between a few to tens of thousands.
3GPP TS 23.501, clause 5.29.2 contains a statement: "The 5G VN Group management can be configured by a network administrator or can be managed dynamically by AF". Not sure if "network administrator" implies a PLMN administrator or an authorized user for the specific 5GLAN VN-Group. Dynamic management by AF, seems to require additional functionality as a user cannot directly access an AF.
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5.8.6  Potential New Requirements needed to support the use caseWord‑p. 22

[PR. 5.8.6-001]
The 5G system shall be able to support large amounts of small 5G LAN-VNs targeting residential deployments.
[PR. 5.8.6-002]
The 5G system shall support authorized 3rd parties to authorize/deauthorize UEs to be able to access a 5G LAN-VN.

5.9  Use case on indoor LAN to 5G LAN connectivityWord‑p. 22

5.9.1  DescriptionWord‑p. 22

5G LAN-VNs aim to provide 5G UEs with similar functionalities to Local Area Networks (LANs) and VPN's but improved with 5G capabilities (e.g. high performance, long distance access, mobility and security). Nevertheless, not every home device will be 5G devices. The use of evolved Residential Gateways that can interact between 5G-LAN VNs and in-home LAN networks, can allow interaction between devices belonging to both deployments.

5.9.2  Pre-conditionsWord‑p. 22

The following pre-conditions and assumptions apply to this use case:
  • There is a 5G LAN with 5G UEs.
  • The home also comprises a in-home LAN with non-3GPP devices.
  • There is an evolved Residential Gateway (eRG) that connects the in-home LAN with the public network

5.9.3  Service FlowsWord‑p. 22

Tom updated his house during the last years into a fully smart house. The lights, kitchen facilities like the coffee machine and his multimedia entertainment system are connected to an in-home LAN deployed at the house.
Tom decides to update the fixed broadband access to his house with a new evolved Residential Gateway (eRG).
Tom also decides to get a subscription to 5G LAN services. All his mobile devices (e.g. mobile phone, tablet, laptop) are added to the 5G LAN. However, he cannot yet get access to the devices on the in-home LAN from his mobile devices.
Tom now includes his eRG into his 5G-LAN VN. The eRG now allows his mobile devices on the 5G-LAN to connect to the devices on his in-home LAN.
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5.9.4  Post-conditionsWord‑p. 22

Tom can access devices on the LAN network of the house now with his 5G-phone.

5.9.5  Existing features partly or fully covering the use case functionalityWord‑p. 23

None.

5.9.6  Potential New Requirements needed to support the use caseWord‑p. 23

[PR. 5.9.6-001]
The 5G system shall support the use of an evolved Residential Gateway to connect 5G devices from the 5G LAN VN it belongs to with non-3GPP devices on an in-home LAN.

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