«ETSI TR 102 021-2 V1.3.1 (2010-12) Technical Report Terrestrial Trunked Radio (TETRA); User Requirement Specification TETRA Release 2.1; Part 2: High ...»
ETSI TR 102 021-2 V1.3.1 (2010-12)
Terrestrial Trunked Radio (TETRA);
User Requirement Specification TETRA Release 2.1;
Part 2: High Speed Data
2 ETSI TR 102 021-2 V1.3.1 (2010-12)
data, TETRA, user
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Contents Intellectual Property Rights
2.1 Normative references
2.2 Informative references
3 Definitions and abbreviations
4 User Requirement Specification
4.1 High Speed Data (HSD) technology solution
4.2 HSD applications
4.2.1 Point-to-point HSD for non-voice applications
4.2.2 Point-to-multipoint HSD for non-voice applications
4.2.3 Voice over HSD
4.3 Data rate capacity in addition to TETRA V+D
4.4 RF coverage requirements for HSD
4.5 Frequency spectrum efficiency requirements
4.6 Integration of HSD with TETRA Release 1 V+D services
4.7 Compatibility of HSD with TETRA Release 1 V+D services
4.8 HSD call types
4.9 Backward compatibility with TETRA Release 1
4.10 Migration from TETRA Release 1
4.11 Availability of HSD
4.12 Relative importance of HSD user requirement criteria
ETSI 4 ETSI TR 102 021-2 V1.3.1 (2010-12) Intellectual Property Rights IPRs essential or potentially essential to the present document may have been declared to ETSI. The information pertaining to these essential IPRs, if any, is publicly available for ETSI members and non-members, and can be found in ETSI SR 000 314: "Intellectual Property Rights (IPRs); Essential, or potentially Essential, IPRs notified to ETSI in respect of ETSI standards", which is available from the ETSI Secretariat. Latest updates are available on the ETSI Web server (http://webapp.etsi.org/IPR/home.asp).
Pursuant to the ETSI IPR Policy, no investigation, including IPR searches, has been carried out by ETSI. No guarantee can be given as to the existence of other IPRs not referenced in ETSI SR 000 314 (or the updates on the ETSI Web server) which are, or may be, or may become, essential to the present document.
Foreword This Technical Report (TR) has been produced by ETSI Technical Committee Terrestrial Trunked Radio (TETRA).
The present document is part 2 of a multi-part deliverable covering the User Requirement Specifications (URSs) for
TETRA Release 2 and Release 2.1, as identified below:
Part 1: "General overview" (Release 2.1);
Part 2: "High Speed Data" (Release 2.1);
Part 3: "Codec" (Release 2);
Part 4: "Air Interface Enhancements" (Release 2.1);
Part 5: "Interworking and Roaming" (Release 2.1);
Part 6: "Subscriber Identity Module (SIM)" (Release 2.1);
Part 7: "Security" (Release 2.1);
Part 8: "Air - Ground - Air services" (Release 2);
Part 9 "Peripheral Equipment Interface" (Release 2.1);
Part 10: "Local Mode Broadband" (Release 2.1);
Part 11: "Over The Air Management" (Release 2.1);
Part 12: "Direct Mode Operation" (Release 2.1).
Introduction The Terms of Reference for TC TETRA approved at ETSI Board meeting #69, November 2008 are to produce ETSI
deliverables (and maintenance thereafter) in accordance with the following requirements:
• The provision of user driven services, facilities and functionality as required by traditional Professional Mobile Radio (PMR) user organizations such as the Emergency Services, Government, Military, Transportation, Utility and Industrial organizations as well as Public Access Mobile Radio (PAMR) Operators.
• The evolution and enhancement of TETRA as required by the market with the provision of new services, facilities and functionality made possible by new technology innovations and standards.
• Further enhancements of the TETRA standard in order to provide increased benefits and optimization in terms of spectrum efficiency, network capacity, system performance, quality of service, security and other relevant parameters.
• The backward compatibility and integration of the new services, facilities and functionality with existing TETRA standards in order to future-proof the existing and future investments of TETRA users.
Technical Objective TETRA is one of a number of digital wireless communication technologies standardized by ETSI.
ETSI TC TETRA produces standards and/or adapts existing standards for efficient digital PMR and PAMR voice and data services, including broadband evolution.
The present document provides the User Requirement Specifications for the TETRA High Speed Data (HSD).
The URS is required by TC TETRA to guide the enhancement of the current TETRA standard, mainly the evolution of the HSD standard part towards broadband.
1 Scope The present document contains the User Requirements Specifications (URS) which are described in non-technical terms and are based on an analysis of the results for High Speed Data from the TETRA Release 2 Market Questionnaire, described in TR 102 021-1 [i.1], clauses 4.2 and 4.3, subsequent results from a joint ETSI/TETRA MoU High Speed Data Workshop held in January 2002, and the Future of TETRA workshop held during the TETRA World Congress 2007 [i.2]. This URS does not offer any technical solutions as they are considered the responsibility of
TC TETRA/WG4. The present document provides the user requirements for HSD translated into terms of:
• HSD applications and net data rates to support non-voice applications
• Frequency spectrum efficiency requirements • Integration of HSD with TETRA Release 1 V+D services • Compatibility of HSD with TETRA Release 1 V+D services
• Relative importance of HSD user requirement criteria The present document is applicable to the specification of TETRA Release 2.1 equipment.
2 ReferencesReferences are either specific (identified by date of publication and/or edition number or version number) or non-specific. For specific references, only the cited version applies. For non-specific references, the latest version of the reference document (including any amendments) applies.
Referenced documents which are not found to be publicly available in the expected location might be found at http://docbox.etsi.org/Reference.
NOTE: While any hyperlinks included in this clause were valid at the time of publication ETSI cannot guarantee their long term validity.
2.1 Normative referencesThe following referenced documents are necessary for the application of the present document.
2.2 Informative references The following referenced documents are not necessary for the application of the present document but they assist the user with regard to a particular subject area.
For the purposes of the present document, the following terms and definitions apply:
conventional access: HSD access method introduced in TETRA Release 2 where the control channel is on a TETRA 1 bearer
direct access: HSD access method introduced in TETRA Release 2.1 where the control channel messaging is done on the HSD bearers High Speed Data (HSD): net data rates in excess of 28,8 kbit/s being the current capability of TETRA Release 1 TETRA Release 2: Work Programme within ETSI Project TETRA to enhance the services and facilities of TETRA in order to meet new user requirements, utilize new technology and increase the longevity of TETRA within the traditional market domains of PMR and PAMR TETRA Release 2.1: Work Programme within TC TETRA to enhance the services and facilities of TETRA in order to meet new user requirements, utilize new technology and increase the longevity of TETRA within the traditional market domains of PMR and PAMR 3.2 Abbreviations
For the purposes of the present document, the following abbreviations apply:
4.1 High Speed Data (HSD) technology solution The HSD technology solution selected by WG4 will be based on a technology that best meets the User Requirements as described in this URS, balanced against any technology constraints identified in WG4 from the candidate technology proposals submitted into WG4 for HSD standard consideration.
4.2 HSD applications 4.2.1 Point-to-point HSD for non-voice applications The net data rates to support non-voice applications on HSD are listed in table 1. For ease of understanding requirements, the table has been sorted in order of net data rates. It is important to note that the original list of HSD applications was derived from the work done by WG1 in May 2001 and from a joint ETSI/TETRA MoU High Speed Data Workshop held in January 2002. The list did not take into consideration the needs of other TETRA and PMR users organizations who did not participate in the questionnaire, workshop, or WG1 work in early 2001. The table has been updated for Release 2.1 based on e.g. Public Safety user requirements gathered by RRS [i.3] and a paper published by the TETRA Association in 2010 [i.4].
The table focuses on net transfer needs as gross bandwidth requirements depend on the technology chosen. For example, mainstream public mobile communications technologies often use a significant amount of bandwidth for error correction to provide a reasonable service at cell edge etc. The '2005 Voice % impact' column in table 1 indicates how the 2002 workshop expected introduction of the named service to impact on voice capacity requirements by 2005, i.e. if an application would have been expected to halve the voice requirement the entry would be -50 %. This column is empty for those applications that were not included in the 2002 workshop.
Table 1 has been updated for Release 2.1 where indicated.
From the table it can be seen that a significant percentage of applications can be supported with net data rates of 80 kbit/s and below. Some as yet undefined applications may require higher data rates. Higher data rates may also be required to improve transfer time of applications identified above. Many of the listed applications could also be supported on a V+D network.
Although the information provided on this table is useful, it is important to note that the mix of applications supported on a network and the amount of non voice traffic is unknown. When the use of mobile data applications over TETRA becomes daily routine, the available data speeds and capacity will quickly be exhausted even with low speed applications. Therefore, the net speed of the air interface should be calculated based not only on the top speeds required by the applications listed, but also thinking of how to cope if there are several users requiring the fast service plus other users requiring a slower service simultaneously within a small area.
For example, in the UK normally an Automatic Number Plate Recognition (ANPR) mobile camera is set to only send the picture of the licence plate and a text file including the interpretation, date, time etc. But it may be required that the the picture of the vehicle is sent too, within the same time given. If situated next to a busy motorway (more than one vehicle per second) this setup alone would create a steady near real time uplink bandwidth requirement of close to 100 kbit/s.
It is also important to note that the applications listed could be rationalized further within categories. However, as the GoS requirements (transfer time in seconds as shown in the table) vary between the identical applications, their individuality has been retained.
ETSI 10 ETSI TR 102 021-2 V1.3.1 (2010-12) Lastly, it should be remembered that as the mainstream data technologies move towards web based applications that are not bandwidth optimized due to ever increasing bandwidth available both in the fixed and wireless networks, the applications to be run over TETRA are likely to be built in a similar manner to avoid paying significantly more for special development tools and environments. This in turn will increase the true amount of bits transmitted per transaction sometimes significantly.
The feedback from the 2007 workshop [i.2] places "increased speed, capacity, and efficiency of TEDS" to the number 1 position in almost all participant categories, only being left second in a couple, behind "RF coverage compatibility between TETRA V+D and TEDS". This is a clear indication of the general feeling that TEDS as defined for Release 2 will not cover future needs when it comes to speed, capacity, and efficiency of the HSD service and more is required.
4.2.2 Point-to-multipoint HSD for non-voice applications Although a typical use case, point-to-point communication is not the only data need the users have. Especially user organisations working on group basis, e.g. police in many cases, have a need to inform several people at virtually the same time. The most effective way of doing this is to utilize point-to-multipoint functionality, instead of sending the same information multiple times using point-to-point functionality. TETRA supports group addressed short data messaging already in Release 1 and to take full advantage of the enhanced data rates Release 2.1 brings, point-to-multipoint HSD is required. It is believed that this service isn't widely available from competing technologies.
Some examples of application areas where point to multipoint data could be used are listed below:
• Sending a picture of a lost person with accompanying text to all police officers within a given area maximizes the chances of locating the person soon.
• Updates on road closures to drivers of vehicles would be useful for any TETRA user group. It is clear that in public safety networks this kind of information is required in good time before the need arises to avoid delays that could potentially mean loss of life. Even though commercial services like public transport don't have the same life-or-death issue, the same service would be of great value for them too. Ideally this information would come with maps showing best alternative routes and/or remotely updating the in-vehicle navigation computers.
• Remote upgrades and/or programming of terminals, computers and other connected equipment in vehicles could possibly be done using a point-to-multipoint data connection. This would significantly improve the terminal management possibilities and minimize the time it takes to upgrade all terminals to support a new functionality or application.