1. The Progress of B-TrunC Broadband Trunking Standard Based on TD-LTE
China Academy of Telecommunication Research(CATR)
of MIIT
February 28，2014

2. Agenda Introduction of CATR
The Development of LTE Broadband Trunking System
and Its Opportunity and Challenge
Progress of B-TrunC and Standards and Its International Standardization

3. Government Think-Tank
and Industry Platform
The most authoritative research and advisory body for national ICT field
The main supporting institution for the comprehensive policy of Ministry of Industry and Information Technology(MIIT)

4. Eight Areas of Soft Science Supports Five Core Businesses
Laws and Regulations
Communication Regulation
Industry and Policy
3G and Broadband Mobile Radio
The Next Generation Network
Internet
Network and Information Security
Industry Development
Broadband wireless mobile field
Taking the work of technical standardization, technical testing and development strategy research for the first generation to 4G cellular mobile communication
Taking an active part in the researching on market application, standardization, industrialization and development strategy for LTE based broadband trunking system

5. Agenda Introduction of CATR
The Development of LTE Broadband Trunking System
and Its Opportunity and Challenge
Progress of B-TrunC and Standards and Its International Standardization

6. Global Wireless Professional Network is Evolving to Broadband and LTE Has Become the Consensus
The USA has started the construction of national 700MHz public safety network(FirstNet) in 2012
which has led to the rapid development of LTE public safety or government network construction in Asia and the Middle East.
China has also started the pilot for TD-LTE based municipal network. Such pilot networks have already been deployed in Beijing, Tianjin, Nanjing and Shanghai
Broadband
Trunking
编辑性修改，宽带集群信道带宽的的大于号
Digital
Trunking
Voice trunking and dispatching
Broadband data service
Multimedia trunking
Channel BW > 5MHz
Data rat>20Mbps
B-TrunC
（Broadband Trunking Communication）
ITU has began to discuss the technical standardization and spectrum allocation strategy for LTE based broadband trunking system
Analog
Trunking
Voice trunking and dispatching
SMS and low-speed data transmission
Channel BW: 25/12.5KHz
Data rate: 28.8kbps
TETRA\P25\DMR
\PDT
Only voice trunking
Channel BW: 25KHz
Data Rate: 2.4kbps
MPT 1
TCCA decided that LTE is the evolution direction for Tetra
TETRA/TEDS
(Narrowband Data)
LTE
1990s
2000s
2010s

7. Opportunity and Challenge for TD-LTE based Broadband Trunking System
To Unify Technical Systems and Standards
Multiple technical solutions and products coexist in LTE broadband trunking and a unified standard is needed urgently to reduce cost and to promote the development of scale.
China has developed B-TrunC broadband trunking standard based on LTE
Capital, Spectrum Resource and Development Mode
The bottleneck of capital and spectrum resource for LTE broadband trunking is more serious than that of narrow band trunking.
It is urgent to explore a development model for LTE broadband trunking with network sharing
Business Model
There is no mature model for network management, construction, operation and users.
Income or profit model, customization for services and terminals
There is no global business models overall. Some countries now are researching the management system, spectrum allocation and budget for nationwide private network
It is urgent for China to carry out research and to establish management systems and mechanisms for private network in the national level.

8. Agenda Introduction of CATR
The Development of LTE Broadband Trunking System
and Its Opportunity and Challenge
Progress of B-TrunC and Standards and Its International Standardization

9. Chinese B-TrunC is Leading the World’s Broadband Trunking Technology and Standard
China has began the standardization for TD-LTE based broadband trunking(B-TrunC) technology since November, Now China has completed the general technical requirements and air interface standards for B-TrunC(phase 1)
System-level standards for LTE broadband trunking which is the world’s only standard at present.
Air interface uses innovative technology of downlink shared channel
Specify system functionality and open interface.
Actively promoting the B-TrunC to be adopted as international standards
Promote LTE broadband
trunking standards to be adopted by ITU-R
and relevant international standards
LTE broadband trunking
standard project was initially
started in November, 2012

10. The Promotion of B-TrunC Broadband Trunking Standards in Stages
The document of research report for TD-LTE based broadband digital trunking system was finished in 2010.
The research of downlink shared channel, MBMS and PoC was carried out
Preliminary Study Stage
Enhance the broadband trunking functionality. Local network
Interface between terminal and system and interface between Core network and dispatcher is opened. Interface of core network is not involved in.
Standard of Stage 1：current work
Network interoperability and roaming
Performance optimization, more functionalities and services
Standard of Stage 2 (early discussions ) :

11. B-TrunC Stage1 Standards
Multi-Protocol Layer： AS 、NAS、APP
Item
Standards
General Requirement
Technical requirement for LTE based broadband trunking system(Phase 1)
Interface Standards
Interface technical requirement for TD-LTE based broadband trunking system(Phase1) – Air interface
Interface technical requirement for TD-LTE based broadband trunking system(Phase1) – interface between terminal and CN
Interface technical requirement for TD-LTE based broadband trunking system(Phase1) – interface between CN and dispatcher
Testing Standards
Interface testing requirement for TD-LTE based broadband trunking system(Phase 1) – Air interface
Interface testing requirement for TD-LTE based broadband trunking system(Phase 1) – interface between terminal and CN
Interface testing requirement for TD-LTE based broadband trunking system(Phase 1) – interface between CN and dispatcher
Interface standards for network and application will be completed in June, 2014
Testing standards will be completed in November, 2014

12. Functionality and Performance of B-TrunC Broadband Trunking System
Guiding Principle: B-TrunC is based on 3GPP R9 and maintains the backward compatibility and interface open for R9.
System functionality
TD-LTE broadband data transmission
Broadband trunking functionality
group call, visual group call, individual call, visual individual call, real-time short data, SMS, free group call release, dynamic regrouping
,remote activation & deactivation, force release/ insert, fallback
Wireless enhancement and network enhancement
Security and priority
System performance
Group call setup time < 300ms
Speaking right apply time < 200ms
Group capacity : 150 groups on 20MHz for each cell
Spectrum efficiency : 2.5bps/Hz on uplink ; 5bps/Hz on downlink
Bandwidth requirement : 5MHz/10MHz/15Mz/20MHz, 1.4Mhz and 3MHz bandwidth is optional

13. B-TrunC Broadband Trunking Standards VS.3GPP Standards
3GPP enhanced bearing capability for voice group call from public network’s point of view.
B-TrunC is system-level standards which supports a variety of services of trunking, and its interface covers LTE bearer layer and service layer.Currently B-TrunC is ahead of 3GPP.
3GPP R12 GCSE
B-TrunC Standards
Functionality
Voice group call
group call, visual group call, individual call, visual individual call, real-time short data, SMS, free group call release, dynamic regrouping
,remote activation & deactivation, force release/ insert, fallback
KPI
Group call setup time<300ms
Group call setup time <300ms
Speak right apply time < 200ms
Group capacity :150 groups/20MHz

14. Progress and Achievement for B-TrunC Standards
2012
2013
2014
Dec
Jan
Feb
Mar
Apr
May
Jun
Jul
Aug
Sep
Oct
Nov
Technical Requirement
Initialization
Interface requirement
Initialization
Testing regulation
Initialization
Define system architecture , functionality and performance requirement
Draft version for technical requirement
Review version for technical requirement
National standardization
Initialization
Air interface standards draft for comment
Define architecture and technology frame for air interface
Air interface review version
Integrated different technical solution
Important technical point integration for air interface
Search space of G-RNTI PDCCH
Mapping of trunking paging
Configuration of trunking traffic channel
Mobility solution
Message design for RRC
E2E flow discussion

15. Research Industry Requirements and Applications
Establish B-TrunC Industry Alliance to Actively Promote the Development of Industry
Research Industry Requirements and Applications
Research requirements and applications for global professional broadband users
Play a leading role in the market to ensure that broadband LTE trunking technology and products truly meet the requirements of market and customers
Promote the research of B-TrunC technology and standard in global
Promote B-TrunC industrialization and build the industrial chain to realize interoperability
Spectrum study for B-TrunC

16. Conclusion
LTE-based broadband trunking has become a consensus for industry development, but iits development model is still under exploring
China has firstly developed B-TrunC broadband trunking standard based on TD-LTE which has performance advantages.
China is going to establish B-TrunC broadband trunking industry alliance to promote its industrialization and internationalization
Hope to jointly write a new chapter in the development of broadband Trunking！