Content for TR 28.832 Word version: 18.0.1

3.1 Terms 3.2 Symbols 3.3 Abbreviations
...

1 Scope p. 5

The present document investigates the potential requirements related to management of the URLLC features defined in RAN side. It documents key issues related to configuration management of URLLC features and to the performance measurements for URLLC service. It provides potential solutions and recommendations for the normative work.

2 References p. 5

The following documents contain provisions which, through reference in this text, constitute provisions of the present document.

References are either specific (identified by date of publication, edition number, version number, etc.) or non-specific.
For a specific reference, subsequent revisions do not apply.
For a non-specific reference, the latest version applies. In the case of a reference to a 3GPP document (including a GSM document), a non-specific reference implicitly refers to the latest version of that document in the same Release as the present document.

[1]

TR 21.905: "Vocabulary for 3GPP Specifications".

[2]

TS 22.104: "Service requirements for cyber-physical control applications in vertical domains; Stage 1".

[3]

TS 22.261: "Service requirements for the 5G system; Stage 1".

[4]

TS 38.211: "NR; Physical channels and modulation".

[5]

TS 38.212: "NR; Multiplexing and channel coding".

[6]

TS 38.213: "NR; Physical layer procedures for control".

[7]

TS 38.214: "NR; Physical layer procedures for data".

[8]

TS 38.300: "NR; NR and NG-RAN Overall Description; Stage 2".

[9]

TS 38.321: "NR; Medium Access Control (MAC) protocol specification".

[10]

TS 38.323: "NR; Packet Data Convergence Protocol (PDCP) specification".

[11]

TR 38.824: "Study on physical layer enhancements for NR ultra-reliable and low latency case (URLLC)".

[12]

TS 28.541: "Management and orchestration; 5G Network Resource Model (NRM)".

[13]

TS 28.552: "Management and orchestration; 5G performance measurements".

[14]

TS 28.554: "Management and orchestration; 5G end to end Key Performance Indicators (KPI)".

[15] Void

[16]

ITU-R M.2410: "Minimum requirements related to technical performance for IMT-2020 radio interface(s)".

3 Definitions of terms, symbols and abbreviations p. 6

3.1 Terms p. 6

For the purposes of the present document, the terms given in TR 21.905 and the following apply. A term defined in the present document takes precedence over the definition of the same term, if any, in TR 21.905.

3.2 Symbols p. 6

Void.

3.3 Abbreviations p. 6

For the purposes of the present document, the abbreviations given in TR 21.905 and the following apply. An abbreviation defined in the present document takes precedence over the definition of the same abbreviation, if any, in TR 21.905.

Preemption Indication

Cancellation Indication

Power Boosting

4 Concepts and overview p. 6

URLLC, Ultra Reliable Low Latency Communication, is a typical service of 5G network, which is mainly applicable to the scenarios having high requirements on latency and reliability. The deployment and commercialization of URLLC service are of great significance to network operators. Efforts to build URLLC service oriented to vertical industries may become a potential growth point to increase revenue.

In order to satisfy the requirements of URLLC service, 3GPP has defined many features to decrease latency and increase reliability to guarantee the SLA of URLLC service. However, only principle and implementation mode of each feature are defined in 3GPP specifications, and it is not indicated that how to manage the features to enable URLLC service in actual network deployment. Consequently, the management of URLLC related features need to be studied to achieve the service requirements of URLLC defined in TS 22.261.

The characteristics of URLLC are mainly reflected in several aspects such as delay/latency, reliability and availability. The concepts and terms used in the present document related to management of URLLC service are shown below:

Term	Reference	Definition
end-to-end latency	TS 22.261	The time that it takes to transfer a given piece of information from a source to a destination, measured at the communication interface, from the moment it is transmitted by the source to the moment it is successfully received at the destination.
reliability	TS 22.261	In the context of network layer packet transmissions, percentage value of the packets successfully delivered to a given system entity within the time constraint required by the targeted service out of all the packets transmitted.
survival time	TS 22.261	The time that an application consuming a communication service may continue without an anticipated message.
communication service availability	TS 22.261	Percentage value of the amount of time the end-to-end communication service is delivered according to a specified QoS, divided by the amount of time the system is expected to deliver the end-to-end service.

The present document studies on the management of URLLC related features defined in RAN groups, including sorting the features from latency, reliability and multiplexing aspects, investigating the requirements of configuration management and performance measurements in OAM.