Update lte-based-5g-broadcast.md (#177)

Author: jordijoangimenez

pages/lte-based-5g-broadcast.md

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 # 5G Broadcast - Relevant Specifications
 
+## About ETSI TS 103 720 - 5G Broadcast System for linear TV and radio services
+
+5G-MAG maintains the ETSI TS 103 720 specification, which introduces the 5G Broadcast System along with its associated features.
+LTE-based 5G Broadcast is a profile of existing 3GPP specifications that addresses all requirements of a 5G Broadcast System. 
+Several functions and reference points are defined. Receiver categories are defined that address implementation profiles 
+to deploy, among others, linear television and radio services.
+
+### Quick access
+* [**Kanban - ETSI TS 103 720**](https://github.com/orgs/5G-MAG/projects/32)
+* [**ETSI JTC Broadcast - Work Item towards v1.3.1**](https://portal.etsi.org/webapp/WorkProgram/Report_WorkItem.asp?WKI_ID=72978)
+* [**ETSI TS 103 720 v1.2.1 06-2023**](https://www.etsi.org/deliver/etsi_ts/103700_103799/103720/01.02.01_60/ts_103720v010201p.pdf)
+* [**ETSI JTC Broadcast - Work Item towards v1.2.1**](https://portal.etsi.org/webapp/workprogram/Report_WorkItem.asp?WKI_ID=58439)
+* [**ETSI TS 103 720 v1.1.1 12-2020**](https://www.etsi.org/deliver/etsi_ts/103700_103799/103720/01.01.01_60/ts_103720v010101p.pdf)
+
+### Updates towards ETSI TS 103 720 v1.3.1
+5G-MAG is now conducting the updates towards the new version of the specification.
+5G-MAG kicked off in 2024 the new work item to update the specification according to 3GPP Release 18 and extends it to also cover Release 19.
+
+The additions, discussed and agreed among members (see [**Kanban - ETSI TS 103 720**](https://github.com/orgs/5G-MAG/projects/32), include:
+* Extensions in 3GPP Rel-18 to address additional use cases and scenarios;
+* Identified bugs or at least clarification questions from implementors of ETSI TS 103 720, in particular by 5G-MAG;
+* New requirements identified by 5G-MAG;
+* Extensions to DVB-I to support 5G Broadcast Based on these considerations.
+* Band support for receivers including Band 108 (UHF);
+* 5G Broadcast as PWS Improvement, e.g. Delivery of Warning Messages from MME to eNodeB;
+* Deployment Guidelines on concurrent support of 5G Broadcast and 5G Unicast;
+* Support for 3GPP Service URLs;
+* Deployment receiver profiles including a RAN-only profile;
+* Low-latency distribution;
+* Potential support of other improvements identified in the timeline of the work item.
+
+### Updates towards ETSI TS 103 720 v1.2.1
+5G-MAG completed in 2023 the 3GPP Release 17 updates for ETSI TS 103 720 v1.2.1.
+The additions, discussed and agreed among members (see [**Kanban - ETSI TS 103 720**](https://github.com/orgs/5G-MAG/projects/32), included:
+* Bug fixes, clarifications and upgrade to 3GPP Rel-17 specification
+* Adding receiver requirements for consistent network planning including requirements on demodulation performance
+* Adding bandwidth information, including 6/7/8 MHz, and broadcast UHF spectrum (based on 3GPP RAN work items)
+* Support of 5GMS over eMBMS with reference to 3GPP TS 26.501 including hybrid use cases
+* Codecs and Formats with reference to 5GMS in 3GPP TS 26.511
+* Support for public warning and emergency alerts based on cell broadcast services.
+
+* [**Kanban - ETSI TS 103 720**](https://github.com/orgs/5G-MAG/projects/32)
+* [**ETSI JTC Broadcast - Work Item towards v1.3.1**](https://portal.etsi.org/webapp/WorkProgram/Report_WorkItem.asp?WKI_ID=72978)
+
+### Updates towards ETSI TS 103 720 v1.2.1
+5G-MAG completed in 2023 the 3GPP Release 17 updates for ETSI TS 103 720 v1.2.1.
+The additions, discussed and agreed among members (see [**Kanban - ETSI TS 103 720**](https://github.com/orgs/5G-MAG/projects/32), included:
+* Bug fixes, clarifications and upgrade to 3GPP Rel-17 specification
+* Adding receiver requirements for consistent network planning including requirements on demodulation performance
+* Adding bandwidth information, including 6/7/8 MHz, and broadcast UHF spectrum (based on 3GPP RAN work items)
+* Support of 5GMS over eMBMS with reference to 3GPP TS 26.501 including hybrid use cases
+* Codecs and Formats with reference to 5GMS in 3GPP TS 26.511
+* Support for public warning and emergency alerts based on cell broadcast services.
+
+* [**ETSI TS 103 720 v1.2.1 06-2023**](https://www.etsi.org/deliver/etsi_ts/103700_103799/103720/01.02.01_60/ts_103720v010201p.pdf)
+* [**ETSI JTC Broadcast - Work Item towards v1.2.1**](https://portal.etsi.org/webapp/workprogram/Report_WorkItem.asp?WKI_ID=58439)
+
+### Publication of ETSI TS 103 720 v1.1.1
+5G-MAG undertook in 2021 the maintenance of ETSI TS 103 720. The initial version (v1.1.1) of this document addressed:
+* Support of Free-to-Air (FTA) and Receive-Only Mode (ROM) services.
+* Network dedicated to linear TV/radio, using supplemental downlink channels and spectrum.
+* Single Frequency Network (SFN) deployments with distances larger than cellular sites
+* Support for mobility scenarios (e.g. up to 250 km/h) for cars, with external antennas.
+* Support for common streaming distribution formats such as Dynamic Streaming over HTTP (DASH), Common Media Application Format (CMAF) and HTTP Live Streaming (HLS).
+* Support for IP-based services such as IPTV or ABR multicast.
+* Support for different file delivery services such as scheduled delivery or file carousels.
+
+* [**ETSI TS 103 720 v1.1.1 12-2020**](https://www.etsi.org/deliver/etsi_ts/103700_103799/103720/01.01.01_60/ts_103720v010101p.pdf)
+
+---
+
 ## Related 3GPP Specifications
 
 This is a list of specifications in the scope of MBMS / LTE-based 5G Terrestrial Broadcast.
 
 ### Main specifications and informative references
-* [ETSI TS 103 720 - 5G Broadcast System for linear TV and radio services; LTE-based 5G terrestrial broadcast system](https://www.etsi.org/deliver/etsi_ts/103700_103799/103720/01.01.01_60/ts_103720v010101p.pdf)
 * 3GPP TR 23.746 - "Study on System Architecture Enhancements to eMBMS for Television Video
 Service".
 * 3GPP TR 36.976 - "LTE; Overall description of LTE-based 5G broadcast"