Content for TR 22.842 Word version: 17.2.0

6.1 Overview 6.2 KPIs of interactive services 6.3 Group operation for interactive service 6.4 Service Hosting Environment Aspects

6 Consolidated potential requirements p. 25

6.1 Overview p. 25

Existing requirements (e.g. minimizing power consumption, supporting QoS provisioning and re-negotiation, supporting lawful interception) mentioned in [4] and [15] should be referred as the baseline for supporting interactive service (e.g. interactive services) and in addition to those, some new requirements are identified in this section.

6.2 KPIs of interactive services p. 25

Several interactive services require the support of very high data rates, very low latency and corresponding packet loss rate of the 5G system. The use cases and their performance requirements can be found in Table 6.2-1.

Cloud/Edge/Split Rendering - The use case for the rendering data transmitted and exchanged between the rendering server and device.
Gaming or Interactive Data Exchanging - The use case for the interactive service data exchanged between two devices.
VR video watching - VR video watching is characterised by exchanging data between two devices where one is less computationally capable than another (e.g. using lightweight VR headset watching videos through smart phone with compressed/uncompressed video contents).

Table 6.2-1: KPI Table of interactive service

Use Cases	Characteristic parameter (KPI)			Influence quantity
Use Cases	Max Allowed End-to-end latency	Service bit rate: user-experienced data rate	Reliability	# of UEs	UE Speed	Service Area (NOTE 2)
Cloud/Edge/Split Rendering (NOTE 1)	[CPR.P-001] 5ms (i.e. UL+DL)	[CPR.P-003] [x] Gbps supporting visual content (e.g. VR based or high definition video) with 4K, 8K resolution and up to120fps content. Editor Note: Exact peak data rate is waiting for SA4 response.	[CPR.P-004] 99.99% in uplink and 99.9% in downlink	-	[CPR.P-007] Stationary or Pedestrian	[CPR.P-008] Countrywide
Gaming or Interactive Data Exchanging (NOTE 3)	[CPR.P-002] 10ms	[x] Gbps supporting visual content (e.g. VR based or high definition video) with 4K, 8K resolution and up to120fps content. Editor Note: Exact peak data rate is waiting for SA4 response.	[CPR.P-005] 99.99%	[CPR.P-006] ≤ [10]	[CPR.P-007] Stationary or Pedestrian	[CPR.P-009] 20 m x 10 m; [CPR.P-010] in one vehicle (up to 120 km/h) and in one train (up to 500 km/h)
VR Video watching (NOTE 3, NOTE 4)	[CPR.P-008] (NOTE 5)	1- [10] Gbps supporting visual content (e.g. VR based or high definition video) with 4K, 8K resolution and above 60fps content. (NOTE 6)	[CPR.P-005] [99.99%]	-	[CPR.P-007] Stationary or Pedestrian	-
NOTE 1: Unless otherwise specified, all communication includes one wireless link (UE to network node or network node to UE) rather than additional direct wireless links (UE to UE). NOTE 2: Length x width (x height). NOTE 3: Communication includes direct wireless links (UE to UE). NOTE 4: The service data rate and the corresponding end-to-end latency depend on service use case/VR rendering architecture and also the compression level. NOTE 5: The end-to end latency plus processing delay should satisfy the upper limit of immersive motion-to-photon latency (including tracking, pose delivery, viewport rendering, encoding, delivery, decoding and display), i.e., 20ms. NOTE 6: The feasibility on the radio level depends on the results from RAN and SA4

6.3 Group operation for interactive service p. 26

[CPR.G-001]

The 3GPP system shall be able to allow UEs making using of groups to serve interactive service.

[CPR.G-002]

The 3GPP network shall allow a trusted 3rd party (e.g., a gaming server) to provide group information to be used for interactive services (e.g. group ID and group member list for interactive application).

[CPR.G-003]

The 3GPP system shall be able to support discovery of UEs in the same group for interactive service via ProSe Communication path.

[CPR.G-004]

The 3GPP system shall be able to authorize the use of ProSe Communication between UEs in the same group for interactive service.

[CPR.G-005]

The 3GPP system shall be able to enable and stop ProSe Communication of UEs within the same group for interactive service based on operator preference.

[CPR.G-006]

The 3GPP network shall be able to collect charging information on a per group basis.

[CPR.G-007]

The 3GPP system shall be able to support unicast and multicast communication for a group of UEs using either the ProSe Communication path (direct) or the 5GC path.

6.4 Service Hosting Environment Aspects p. 27

[CPR.N-001]

The 5G System shall enable the discovery of a suitable Hosted Service.

7 Conclusion and recommendations p. 28

This TR on Network Controlled Interactive Service (NCIS) analyses several use cases of NCIS as follows:

NCIS Service Supporting
New Requirements for VR Based NCIS Service
Cloud Rendering for Games
High Speed Scenario
IoE Based Social Networking
Communication within NCIS group

It is recommended to proceed with normative work, and include the potential new requirements identified by this TR into TS 22.261 and other specifications.

Define a new section in TS 22.261
Refine potential requirements in TS 22.278 if needed and also captured in TS 22.261
Capture new requirements in TS 22.261

The consolidated potential requirements in Clause 6 are candidates for normative R17 requirements.