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full Contents for  TS 22.261  Word version:   17.2.0

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6.8  Dynamic policy control
The 5G system shall support the creation and enforcement of prioritisation policy for users and traffic, during connection setup and when connected.
NOTE:
Prioritisation, pre-emption, and precedence of critical traffic associated with certain priority services (e.g. MPS and Emergency) are subject to regional/national regulatory and operator policies.
The 5G system shall support optimised signalling for prioritised users and traffic where such signalling is prioritized over other signalling traffic.
Based on operator policy, the 5G system shall allow flexible means for authorized entities to create and enforce priority among the different service flows.
Based on operator policy, the 5G system shall support a real-time, dynamic, secure and efficient means for authorized entities (e.g. users, context aware network functionality) to modify the QoS and policy framework. Such modifications may have a variable duration.
Based on operator policy, the 5G system shall maintain a session when prioritization of that session changes in real time, provided that the new priority is above the threshold for maintaining the session.
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6.9  Connectivity models [R16]Word-p. 24
6.9.1  Description
The UE (remote UE) can connect to the network directly (direct network connection), connect using another UE as a relay UE (indirect network connection), or connect using both direct and indirect connections. Relay UEs can be used in many different scenarios and verticals (inHome, SmartFarming, SmartFactories, Public Safety and others). In these cases, the use of relays UEs can be used to improve the energy efficiency and coverage of the system.
Remote UEs can be anything from simple wearables, such as sensors embedded in clothing, to a more sophisticated wearable UE monitoring biometrics. They can also be non-wearable UEs that communicate in a Personal Area Network such as a set of home appliances (e.g. smart thermostat and entry key), or the electronic UEs in an office setting (e.g. smart printers), or a smart flower pot that can be remotely activated to water the plant.
When a remote UE is attempting to establish an indirect network connection, there might be several relay UEs that are available in proximity and supporting selection procedures of an appropriate relay UE among the available relay UEs is needed.
Indirect networkk connection covers the use of relay UEs for connecting a remote UE to the 3GPP network. There can be one or more relay UE(s) (more than one hop) between the network and the remote UE.
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6.9.2  Requirements
The following set of requirements complement the requirements listed in 3GPP TS 22.278, clauses 7B and 7C.
6.9.2.1  General [R17]
The 5G system shall support the relaying of traffic between a remote UE and a gNB using one or more relay UEs.
The 5G system shall support different traffic flows of a remote UE to be relayed via different indirect network connection paths.
The connection between a remote UE and a relay UE shall be able to use 3GPP RAT or non-3GPP RAT and use licensed or unlicensed band.
The connection between a remote UE and a relay UE shall be able to use fixed broadband technology.
The 5G system shall support indirect network connection mode in a VPLMN when a remote UE and a relay UE subscribe to different PLMNs and both PLMNs have a roaming agreement with the VPLMN.
The 5G system shall be able to support a UE using simultaneous indirect and direct network connection mode.
The network operator shall be able to define the maximum number of hops supported in their networks when using relay UEs.
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6.9.2.2  Services and Service Continuity [R17]
A 5G system shall be able to support all types of traffic e.g. voice, data, IoT small data, multimedia, MCX for indirect network connection mode.
The 5G system shall be able to support QoS for a user traffic session between the remote UE and the network using 3GPP access technology.
The 5G system shall be able to provide indication to a remote UE (alternatively, an authorized user) on the quality of currently available indirect network connection paths.
The 5G system shall be able to maintain service continuity of indirect network connection for a remote UE when the communication path to the network changes (i.e. change of one or more of the relay UEs, change of the gNB).
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6.9.2.3  Permission and Authorization [R17]Word-p. 25
The 5G system shall enable the network operator to authorize a UE to use indirect network connection. The authorization shall be able to be restricted to using only relay UEs belonging to the same network operator. The authorization shall be able to be restricted to only relay UEs belonging to the same application layer group.
The 5G system shall enable the network operator to authorize a UE to relay traffic as relay UE. The authorization shall be able to allow relaying only for remote UEs belonging to the same network operator. The authorization shall be able to allow relaying only for remote UEs belonging to the same application layer group.
The 5G system shall support a mechanism for an end user to provide/revoke permission to an authorized UE to act as a relay UE.
The 5G system shall support a mechanism for an authorized third-party to provide/revoke permission to an authorized UE to act as a relay UE.
The 5G system shall provide a suitable API by which an authorized third-party shall be able to authorize (multiple) UEs under control of the third-party to act as a relay UE or remote UE.
The 5G system shall provide a suitable API by which an authorized third-party shall be able to enable/disable (multiple) UEs under control of the third-party to act as a relay UE or remote UE.
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6.9.2.4  Relay UE Selection [R17]
The 3GPP system shall support selection and reselection of relay UEs based on a combination of different criteria e.g.
  • the characteristics of the traffic that is intended to be relayed (e.g. expected message frequency and required QoS),
  • the subscriptions of relay UEs and remote UE,
  • the capabilities/capacity/coverage when using the relay UE,
  • the QoS that is achievable by selecting the relay UE,
  • the power consumption required by relay UE and remote UE,
  • the pre-paired relay UE,
  • the 3GPP or non-3GPP access the relay UE uses to connect to the network,
  • the 3GPP network the relay UE connects to (either directly or indirectly),
  • the overall optimization of the power consumption/performance of the 3GPP system, or
  • battery capabilities and battery lifetime of the relay UE and the remote UE.
NOTE:
Reselection may be triggered by any dynamic change in the selection criteria, e.g. by the battery of a relay UE getting depleted, a new relay capable UE getting in range, a remote UEs requesting additional resources or higher QoS, etc.
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6.9.2.5  Satellite and Relay UEs [R17]
For a 5G system with satellite access, the following requirements apply:
  • A 5G system with satellite access shall be able to support relay UE's with satellite access.
  • NOTE:
    The connection between a relay UE and a remote UE is the same regardless of whether the relay UE is using satellite access or not.
  • A 5G system with satellite access shall support mobility management of relay UEs and the remote UEs connected to the relay UE between a 5G satellite access network and a5G terrestrial network, and between 5G satellite access networks.
  • A 5G system with satellite access shall support joint roaming between different 5G networks of a relay UE and the remote UEs connected to that relay UE.
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6.10  Network capability exposureWord-p. 26
6.10.1  Description
3GPP SEES and (e)FMSS features allow the operator to expose network capabilities e.g. QoS policy to third-party ISPs/ICPs. With the advent of 5G, new network capabilities need to be exposed to the third-party (e.g. to allow the third-party to customize a dedicated physical or virtual network or a dedicated network slice for diverse use cases; to allow the third-party to manage a trusted third-party application in a Service Hosting Environment to improve user experience, and efficiently utilize backhaul and application resources).
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6.10.2  Requirements
The following set of requirements complement the requirements listed in 3GPP TS 22.101, clause 29.
Based on operator policy, a 5G network shall provide suitable APIs to allow a trusted third-party to create, modify, and delete network slices used for the third-party.
Based on operator policy, the 5G network shall provide suitable APIs to allow a trusted third-party to monitor the network slice used for the third-party.
Based on operator policy, the 5G network shall provide suitable APIs to allow a trusted third-party to define and update the set of services and capabilities supported in a network slice used for the third-party.
Based on operator policy, the 5G network shall provide suitable APIs to allow a trusted third-party to configure the information which associates a UE to a network slice used for the third-party.
Based on operator policy, the 5G network shall provide suitable APIs to allow a trusted third-party to configure the information which associates a service to a network slice used for the third-party.
Based on operator policy, the 5G network shall provide suitable APIs to allow a trusted third-party to assign a UE to a network slice used for the third-party, to move a UE from one network slice used for the third-party to another network slice used for the third-party, and to remove a UE from a network slice used for the third-party based on subscription, UE capabilities, and services provided by the network slice.
The 3GPP network shall be able to provide suitable and secure means to enable an authorized third-party to provide the 3GPP network via encrypted connection with the expected communication behaviour of UE(s).
NOTE 1:
The expected communication behaviour is, for instance, the application servers a UE is allowed to communicate with, the time a UE is allowed to communicate, or the allowed geographic area of a UE.
The 3GPP network shall be able to provide suitable and secure means to enable an authorized third-party to provide via encrypted connection the 3GPP network with the actions expected from the 3GPP network when detecting behaviour that falls outside the expected communication behaviour.
NOTE 2:
Such actions can be, for instance, to terminate the UE's communication, to block the transferred data between the UE and the not allowed application.
The 5G network shall be able to provide secure means for providing communication scheduling information (i.e. the time period the UE(s) will use a communication service) to an NPN via encrypted connection. This communication scheduling information is used by the 5G network to perform network energy saving and network resource optimization.
The 5G network shall provide a mechanism to expose broadcasting capabilities to trusted third-party broadcasters' management systems.
Based on operator policy, a 5G network shall provide suitable APIs to allow a trusted third-party to manage this trusted third-party owned application(s) in the operator's Service Hosting Environment.
Based on operator policy, the 5G network shall provide suitable APIs to allow a third-party to monitor this trusted third-party owned application(s) in the operator's Service Hosting Environment.
Based on operator policy, the 5G network shall provide suitable APIs to allow a trusted third-party to scale a network slice used for the third-party, i.e. to adapt its capacity.
Based on operator policy, a 5G network shall provide suitable APIs to allow one type of traffic (from trusted third-party owned applications in the operator's Service Hosting Environment) to/from a UE to be offloaded to a Service Hosting Environment close to the UE's location.
Based on operator policy, the 5G network shall provide suitable APIs to allow a trusted third-party application to request appropriate QoE from the network.
Based on operator policy, the 5G network shall expose a suitable API to an authorized third-party to provide the information regarding the availability status of a geographic location that is associated with that third-party.
Based on operator policy, the 5G network shall expose a suitable API to allow an authorized third-party to monitor the resource utilisation of the network service (radio access point and the transport network (front, backhaul)) that are associated with the third-party.
Based on operator policy, the 5G network shall expose a suitable API to allow an authorized third-party to define and reconfigure the properties of the communication services offered to the third-party.
The 5G system shall support the means for disengagement (tear down) of communication services by an authorized third-party.
Based on operator policy, the 5G network shall expose a suitable API to provide the security logging information of UEs, for example, the active 3GPP security mechanisms (e.g. data privacy, authentication, integrity protection) to an authorized third-party.
Based on operator policy, the 5G system shall provide suitable means to allow a trusted and authorized third-party to consult security related logging information for the network slices dedicated to that third-party.
Based on operator policy, the 5G network shall be able to acknowledge within 100ms a communication service request from an authorized third-party via a suitable API.
The 5G network shall provide suitable APIs to allow a trusted third-party to monitor the status (e.g. locations, lifecycle, registration status) of its own UEs.
NOTE:
The number of UEs could be in the range from single digit to tens of thousands.
The 5G network shall provide suitable APIs to allow a trusted third-party to get the network status information of a private slice dedicated for the ' party, e.g. the network communication status between the slice and a specific UE.
The 5G system shall support APIs to allow the non-public network to be managed by the MNO third s Operations System.
The 5G system shall provide suitable APIs to allow third-party infrastructure (i.e. physical/virtual network entities at RAN/core level) to be used in a private slice.
A 5G system shall provide suitable APIs to enable a third-party to manage its own non-public network and its private slice(s) in the PLMN in a combined manner.
The 5G system shall support suitable APIs to allow an MNO to offer automatic configuration services (for instance, interference management) to non-public networks deployed by third parties and connected to the MNO's Operations System through standardized interfaces.
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6.11  Context aware networkWord-p. 27
6.11.1  Description
A variety of sensors such as accelerometer, gyroscope, magnetometer, barometer, proximity sensor, and GPS can be integrated in a UE. Also, different applications running on the UE can have different communication needs (e.g. different traffic time). In addition, a UE can support different access technologies such as NR, E-UTRA, WLAN access technology, and fixed broadband access technology. The information gathered by sensors, the utilized access technologies, the application context, and the application traffic characteristics can provide useful information to the applications installed in the UE and can also help the 5G system utilize resources in an efficient and optimized way.
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6.11.2  RequirementsWord-p. 28
The 5G system shall support network resource utilization efficiently and network optimization based on system information, including:
  • network conditions, such as network load and congestion information;
  • information on served UEs such as access information (e.g. 3GPP access, non-3GPP access), cell type (e.g. macro cell, small cell), user experienced data rate;
  • application's characteristics (e.g. expected traffic over time);
  • information on prioritized communication such as user subscription profile and priority level, priority services (e.g. MPS, Emergency, and Public Safety), application used for priority communications (e.g. voice, video, and data) and traffic associated with priority communications (signalling and media);
  • subject to user consent, enhanced traffic characteristic of UE (e.g. Mobility information (e.g. no mobility, nomadic, spatially restricted mobility, full mobility), location, sensor-level information (e.g. direction, speed, power status, display status, other sensor information installed in the UE), application-level information (e.g. foreground applications, running background application, and user settings).
The 5G system shall support mechanisms to collect system information for network optimization within an operator configured time scale.
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