ETSI TS 103 652-1 V1.1.1 (2019-02)

TECHNICAL SPECIFICATION
Reconfigurable Radio Systems (RRS);
evolved Licensed Shared Access (eLSA);
Part 1: System requirements
2 ETSI TS 103 652-1 V1.1.1 (2019-02)

Reference
DTS/RRS-0150
Keywords
LSA spectrum resource, network, radio
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3 ETSI TS 103 652-1 V1.1.1 (2019-02)
Contents
Intellectual Property Rights . 5
Foreword . 5
Modal verbs terminology . 5
Introduction . 5
1 Scope . 7
2 References . 7
2.1 Normative references . 7
2.2 Informative references . 7
3 Definition of terms, symbols and abbreviations . 8
3.1 Terms . 8
3.2 Symbols . 9
3.3 Abbreviations . 9
4 Requirement organization and methodology . 9
4.1 Requirement organization . 9
4.2 Requirement format . 10
4.3 Requirement formulation . 10
4.4 eLSA Roles . 10
5 Working Assumptions . 11
5.1 General Assumptions . 11
5.2 Operation of local high-quality wireless networks . 11
5.3 Regulatory background . 12
5.4 Sharing Framework . 12
5.5 Spectrum Sharing Arrangement . 12
5.6 eLSA functional enhancements . 13
rd
5.7 eLSA system administration by trusted 3 parties . 13
6 Functional system requirements . 13
6.1 General system operation . 13
6.1.0 Introduction. 13
6.1.1 R-FUNC-GEN-01 eLSA spectrum resource sharing . 13
6.1.2 R-FUNC-GEN-02 Quality of service . 14
6.1.3 R-FUNC-GEN-03 Information exchange between eLSA roles . 14
6.1.4 R-FUNC-GEN-04 Multiple eLSA Licensee/Lessee support . 14
6.1.5 R-FUNC-GEN-05 Multiple Incumbent user support . 14
6.1.6 R-FUNC-GEN-06 Sharing framework support . 14
6.1.7 R-FUNC-GEN-07 Confidentiality of spectrum resource information . 15
6.1.8 R-FUNC-GEN-08 Provision of failure indication . 15
6.1.9 R-FUNC-GEN-09 eLSA system data storage function . 15
6.1.10 R-FUNC-GEN-10 eLSA system reporting function . 16
6.1.11 R-FUNC-GEN-11 Support of scheduled operation . 16
6.1.12 R-FUNC-GEN-12 Support of on-demand operation . 16
6.1.13 R-FUNC-GEN-13 Support of pre-configuration . 16
6.1.14 R-FUNC-GEN-14 Verification of inputs to the eLSA system . 17
6.1.15 R-FUNC-GEN-15 eLSA system availability to stakeholders . 17
6.1.16 R-FUNC-GEN-16 eLSA system operation in case of change of sharing arrangement or sharing
framework . 17
6.1.17 R-FUNC-GEN-17 Support of allowance zones . 18
6.2 Incumbent protection requirements . 18
6.2.0 Introduction. 18
6.2.1 R-FUNC-INC-01 Protection of information of the Incumbent . 18
6.2.2 R-FUNC-INC-02 General protection of the incumbent . 18
6.2.3 R-FUNC-INC-03 Variation of incumbent's usage and protection requirements . 18
6.2.4 R-FUNC-INC-04 End-to-end acknowledgment of operational changes . 19
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4 ETSI TS 103 652-1 V1.1.1 (2019-02)
6.2.5 R-FUNC-INC-05 Support of constraints on eLSA Licensee's transmissions . 19
6.2.6 R-FUNC-INC-06 Support of constraints on received interference due to the eLSA Licensee's
transmissions. 19
6.3 Resource grant requirements . 19
6.3.0 Introduction. 19
6.3.1 R-FUNC-GRA-01 Protection of information of the eLSA Licensee . 20
6.3.2 R-FUNC-GRA-02 Access grant to specific spectrum sharing arrangement information . 20
6.3.3 R-FUNC-GRA-03 General protection of the eLSA Licensee . 20
6.3.4 R-FUNC-GRA-04 Variation of eLSA Licensee's protection . 20
6.3.5 R-FUNC-GRA-05 End-to-end acknowledgment for eLSA spectrum resource availability changes . 21
6.3.6 R-FUNC-GRA-06 Support for Different eLSA Licensee response times . 21
6.4 Security requirements . 21
6.4.0 Introduction. 21
6.4.1 R-FUNC-SEC-01 Data integrity . 21
6.4.2 R-FUNC-SEC-02 Data authenticity. 22
6.4.3 R-FUNC-SEC-03 Data confidentiality . 22
6.4.4 R-FUNC-SEC-04 Identity management and authentication . 22
6.4.5 R-FUNC-SEC-05 Support of authorization profiles . 22
History . 23

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5 ETSI TS 103 652-1 V1.1.1 (2019-02)
Intellectual Property Rights
Essential patents
IPRs essential or potentially essential to normative deliverables 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 (https://ipr.etsi.org/).
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.
Trademarks
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ETSI claims no ownership of these except for any which are indicated as being the property of ETSI, and conveys no
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Foreword
This Technical Specification (TS) has been produced by ETSI Technical Committee Reconfigurable Radio Systems
(RRS).
The present document is part 1 of a multi-part deliverable covering evolved Licensed Shared Access (eLSA), as
identified below:
Part 1: "System requirements";
Part 2: "System architecture and high-level procedures".
Modal verbs terminology
In the present document "shall", "shall not", "should", "should not", "may", "need not", "will", "will not", "can" and
"cannot" are to be interpreted as described in clause 3.2 of the ETSI Drafting Rules (Verbal forms for the expression of
provisions).
"must" and "must not" are NOT allowed in ETSI deliverables except when used in direct citation.
Introduction
The concept of local high-quality wireless networks has been identified in ETSI TR 103 588 [i.1] as a collective term to
enclose a kind of use cases targeting local area services requiring predictable levels of QoS, e.g. in vertical industrial
sectors such as industrial automation, PMSE, PPDR and e-Health. Their need for predictable levels of QoS mostly
preclude operation in a license-exempt spectrum, due to coexistence issues, and target exclusively licensed spectrum.
However, due to the current scarcity of suitable exclusive licensed spectrum resources, which can be directly accessible
by vertical local area service providers, spectrum sharing has been proposed in [i.1] as the enabling spectrum
technology for introducing QoS enabled local area services in licensed bands.
NOTE: In the present document, the term "local area service provider" used in [i.1] is substituted by the term
"MFCN operator". An MFCN operator refers to e.g. a vertical sector operator.
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6 ETSI TS 103 652-1 V1.1.1 (2019-02)
Three possible spectrum sharing schemes have been identified in [i.1] for providing local area services focusing on QoS
in licensed bands:
1) MNOs can offer dedicated local area services in their licensed frequencies.
2) MNOs can lease part out of their spectrum locally to local area service providers.
3) Spectrum can be nationally licensed to local area services providers.
Scheme 1 addresses the hosting of local high-quality wireless networks as service network areas by MNOs. Schemes 2
and 3 target the deployment of local high-quality wireless networks as standalone private networks.
The use of scheme 2 is not limited to MNO bands, but any licensed band can be used where leasing is regulatory
allowed.
All three spectrum sharing schemes aim to facilitate licensed spectrum sharing between local vertical sector operators,
with specified geographical and temporal limits, and incumbents both in IMT and non-IMT bands. In this context, the
focus on IMT-bands facilitates wide availability of equipment since those bands are also used by Mobile Network
Operators (MNOs).
For enabling each of the three functional use cases, clauses 6.1 and 6.2 in [i.1] provide examples of functional
architectures in a general sense and within the current LSA framework [i.2], [i.3] and [i.4], respectively.
The main advantage of embracing the LSA framework is that it aims to ensure a predictable level of QoS at a defined
location for all spectrum resource users, i.e. LSA licensees and incumbents. The current LSA framework was designed
to share spectrum resources between Incumbents and LSA Licensees acting as MNOs. However, the support of vertical
local area service providers as a new type of LSA licensees, which asks for both shorter or longer time of spectrum
resource deployments with a predictable QoS level, and the expected higher number of these new type of LSA licensees
make it necessary to evolve the current LSA framework on both system and CEPT/NRA levels.
At the regulatory level, for instance, the role concept in LSA needs to be evolved opening the LSA method to include
local vertical sector operators as licensees.
At LSA system level, Table 6 in ETSI TR 103 588 [i.1] lists an overview of identified potential functional
enhancements to the current LSA system and the corresponding affected LSA entities.
The present document leverages on the findings in ETSI TR 103 588 [i.1] to technically specify the requirements for
providing spectrum access for local high-quality wireless networks within the LSA framework [i.5].

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7 ETSI TS 103 652-1 V1.1.1 (2019-02)
1 Scope
The objective of evolving the LSA framework towards an eLSA (evolved LSA) system is to support spectrum access to
local high-quality wireless networks operated by vertical sector operators, as introduced in ETSI TR 103 588 [i.1]. The
present document specifies system requirements for that purpose.
ETSI TC RRS work on eLSA is of technical nature aiming to provide an automatic tool to facilitate spectrum sharing
coordination between incumbents, NRAs and eLSA Licensees (e.g. vertical sector operators).
To meet the spectrum access demand and needs of local high-quality wireless networks, eLSA aims to offer technical
means to facilitate the spectrum allocation procedure, including automatic local area licensing and leasing agreements,
and to manage the conditions of spectrum use. The work is based on the generic aspects of the current ETSI
specifications [i.2], [i.3] and [i.4] for Licensed Shared Access (LSA) in the 2 300 - 2 400 MHz band and on the
functional enhancements proposed in ETSI TR 103 588 [i.1].
The work targets operation of local high-quality wireless networks in licensed bands to guarantee predictable QoS
levels. It is agnostic to the radio frequency bands.
The work on eLSA is based on the LSA concept [i.5], i.e. same architecture, role assumptions and applicable
functionality.
The requirements in the present document are intended to be used for the definition of an evolved LSA system
architecture specification for providing spectrum access for local high-quality wireless networks.
2 References
2.1 Normative references
References 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
referenced document (including any amendments) applies.
Referenced documents which are not found to be publicly available in the expected location might be found at
https://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.
The following referenced documents are necessary for the application of the present document.
Not applicable.
2.2 Informative references
References 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
referenced document (including any amendments) applies.
NOTE: While any hyperlinks included in this clause were valid at the time of publication, ETSI cannot guarantee
their long term validity.
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.
[i.1] ETSI TR 103 588 (V1.1.1): "Reconfigurable Radio Systems (RRS); Feasibility study on temporary
spectrum access for local high-quality wireless networks".
[i.2] ETSI TS 103 154 (V1.1.1): "Reconfigurable Radio Systems (RRS); System requirements for
operation of Mobile Broadband Systems in the 2300 MHz - 2400 MHz band under Licensed
Shared Access (LSA)".
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8 ETSI TS 103 652-1 V1.1.1 (2019-02)
[i.3] ETSI TS 103 235 (V1.1.1): "Reconfigurable Radio Systems (RRS); System architecture and high
level procedures for operation of Licensed Shared Access (LSA) in the 2 300 MHz - 2 400 MHz
band".
[i.4] ETSI TS 103 379 (V1.1.1): "Reconfigurable Radio Systems (RRS); Information elements and
protocols for the interface between LSA Controller (LC) and LSA Repository (LR) for operation
of Licensed Shared Access (LSA) in the 2 300 MHz - 2 400 MHz band".
[i.5] ECC Report 205: "Licensed Shared Access (LSA)", February 2014, CEPT WG FM PT53.
[i.6] ETSI TR 103 113 (V1.1.1): "Electromagnetic compatibility and Radio spectrum Matters (ERM);
System Reference document (SRdoc); Mobile broadband services in the 2 300 MHz - 2 400 MHz
frequency band under Licensed Shared Access regime".
3 Definition of terms, symbols and abbreviations
3.1 Terms
For the purposes of the present document, the following terms apply:
allowance zone: geographical area within which an eLSA Licensee is allowed to operate radio transmitters on its
assigned spectrum resource
NOTE 1: An allowance zone is defined using specific measurement quantities and thresholds, e.g. a maximum field
strength level expressed in dBµ V/m/MHz, along the border of its geographical area.
NOTE 2: An allowance zone is normally applicable for a defined frequency range and time period.
eLSA licensee: entity operating a MFCN, which holds individual rights of use to an eLSA spectrum resource
NOTE: eLSA licensee role extends the scope of LSA licensees to include vertical sectors stakeholders
(e.g. vertical local area communication service providers/operators).
eLSA spectrum resource: spectrum resource which is to be shared between an incumbent and an eLSA licensee on a
static or dynamic basis according to the sharing framework defined by the administrations (NRAs)
eLSA system: system that enables and/or facilitates the realization of eLSA, and which comprises the eLSA specific
technical features, architecture, protocols, and interfaces
incumbent: current holder of spectrum rights of use
lease: arrangement between the lessor and the lessee for using parts of the spectrum, a particular geographical area, or a
combination of both, over a period of time
lessee: entity which holds right of use to a certain spectrum resource from a lessor under a lease
lessor: entity holding individual rights of use (license) to a certain spectrum resource, which leases out parts of his
license to a lessee under a lease
protection zone: geographical area within which incumbent receivers will not be subject to harmful interference caused
by eLSA/LSA licensees' transmissions
NOTE: A protection zone is defined using specific measurement quantities and thresholds (e.g. a mean field
strength that does not exceed a defined value in dBµ V/m/MHz at a defined receiver antenna height above
ground level). A protection zone is normally applicable for a defined frequency range and time period.
restriction zone: geographical area within an allowance zone where an eLSA Licensee has to operate under certain
additional restrictive conditions (e.g. maximum EIRP limits and/or constraints on antenna parameters)
sharing arrangement: set of practical details for sharing an eLSA and/or LSA spectrum resource
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9 ETSI TS 103 652-1 V1.1.1 (2019-02)
sharing framework: set of sharing rules or sharing conditions that will materialize the change, if any, in the spectrum
rights of the incumbent(s) and define the spectrum, with corresponding technical and operational conditions, that can be
made available for alternative usage under eLSA and/or LSA
spectrum resource: resource or set of resources defined in time, space and frequency domains
vertical sector operator: operator of a local high-quality wireless network (MFCN) addressing a vertical sector
specific local connectivity needs
NOTE: The concept of "vertical sector" is used to name business sectors that have a need to use MFCNs to
maintain their operations, such as the transport, the culture and creative, the industrial automation or the
healthcare sectors. Different vertical sectors have different connectivity requirements: e.g. capacity,
network quality, latency, communication security and reliability.
3.2 Symbols
Void.
3.3 Abbreviations
For the purposes of the present document, the following abbreviations apply:
CEPT Conférence Européenne des administrations des Postes et des Télécommunications
ECC Electronic Communications Committee of the CEPT
EIRP Effective Isotropic Radiated Power
eLSA evolved LSA
IMT International Mobile Telecommunications
LSA Licensed Shared Access
MFCN Mobile/Fixed Communication Network
NOTE: MFCN is used in the present document to refer to a local high-quality wireless network.
MNO Mobile Network Operator
NRA National Regulatory Administration
PMSE Programme Making and Special Events
PPDR Public Protection and Disaster Relief
QoS Quality of Service
4 Requirement organization and methodology
4.1 Requirement organization
This clause contains a description of how the requirements are organized.
As shown in Figure 1, the requirements described in the present document belong to the category of functional
requirements. This category, in turn, is organized into groups.
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Functional requirements category
(FUNC)
General System Operation requirements group
Incumbent Protection requirements group
Resource Grant requirements group
Security requirements group
Figure 1: Organization of functional requirements
4.2 Requirement format
This clause describes the format of the requirements.
A letter code system is defined which makes a unique identification of each requirement R---.
It should be constructed as follows:
• R-: Standard requirement prefix
• :
Code Category
FUNC Functional aspects
• : Requirement group identifier. A three-letter code will be used for this identifier
• : Requirement identifier within requirement group; range 01 => 99
EXAMPLE: R-FUNC-GEN-01.
4.3 Requirement formulation
A requirement is formulated in such a way that it is uniquely defined. It is built as follows:
• Title: </br> • Description: the description of a requirement will be formulated using the ETSI modal verbal terminology</br> 4.4 eLSA Roles</br> Requirements are formulated in regards of the "eLSA System" and make use of generic "eLSA roles". "eLSA roles" are</br> based on "LSA roles" as introduced in ECC Report 205 [i.5]. eLSA Licensee role includes the lease/sub-lease case and</br> extends the scope to vertical sectors stakeholders.</br> ETSI</br> 11 ETSI TS 103 652-1 V1.1.1 (2019-02)</br> Administration/NRA Role</br> Incumbent Role eLSA Licensee Role</br> eLSA System</br> eLSA System Administrator Role</br> </br> Figure 2: eLSA roles</br> 5 Working Assumptions</br> 5.1 General Assumptions</br> The working assumptions described below are based on ETSI TR 103 588 [i.1], and particularly on the three functional</br> use cases described in clause 6.1 and summarized in Table 5 of ETSI TR 103 588 [i.1], as well as on the current ETSI</br> LSA framework [i.2], [i.3], [i.4] and the ECC Report 205 [i.5].</br> For eLSA, the following general working assumptions apply:</br> • It operates in licensed bands and follows the concept defined for LSA [i.5] to allow for predictable QoS levels.</br> • It follows an agnostic approach in terms of targeted frequency bands and technology.</br> • It targets the role assumptions, the applicable functionality, and a system architecture as close as possible to</br> the LSA system keeping simplicity to avoid a complex infrastructure adding cost.</br> NOTE: It is intended that an eLSA system under the general working assumptions stated in this clause could</br> serve multiple use cases such as, e.g.:</br>  providing spectrum access for the operation of local high-quality wireless networks as described in</br> ETSI TR 103 588 [i.1];</br>  "Bandwidth expansion for mobile network operator" in clause 7.1.2 of [i.6].</br> 5.2 Operation of local high-quality wireless networks</br> Local high-quality wireless networks refer to MFCNs capable of supporting different use cases with following</br> commons:</br> • their operation is confined in a local geographical area:</br> - the definition of a local geographical area is assumed to be based on premises, real estate, address or</br> similar notion. Having a precise area definition with right size that is non-geographically overlapping</br> would help in licensing and leasing processes. Free polygon definitions as in LSA may still be useful, for</br> instance for events where the area can cross several different real estate properties. What to use in a</br> specific country would need to be determined nationally as regulation and needs may differ from country</br> to country;</br> • have short-term to long-term deployments;</br> ETSI</br> 12 ETSI TS 103 652-1 V1.1.1 (2019-02)</br> • need predictable levels of QoS, particularly in terms of deterministic communication behaviour, reliability and</br> latency, etc.:</br> - the allocation of a frequency block in a local geographical area is expected to be predictable to ensure the</br> required QoS;</br> • network infrastructure and management with a suitable combination of private and public networks for</br> implementing specific security standards or due to privacy reasons.</br> The present document aims at specifying system requirements for providing spectrum access for local high-quality</br> wireless networks within the LSA framework [i.2], [i.3], [i.4]. Therefore, the current LSA specifications needs to be</br> evolved on both LSA system and regulatory levels.</br> 5.3 Regulatory background</br> The current ETSI LSA framework [i.2], [i.3], [i.4] provides a solution to enable spectrum access to the 2 300 MHz -</br> 2 400 MHz frequency band for MFCNs acting as MNOs. At this stage, eLSA does not target specific radio bands but</br> aims to provide a general solution for providing spectrum access to local high-quality wireless networks in whatever</br> suitable licensed frequency bands. It should be noted that the licensing and access to spectrum is a national decision and</br> different radio bands may be suitable in different countries.</br> As a frequency agnostic, general, technical approach, eLSA has the potential to facilitate spectrum access for local high</br> quality wireless networks under different national spectrum regulatory frameworks. The focus lies on the automation of</br> the spectrum allocation procedure, including local area licensing and leasing agreements, and the management of the</br> conditions of spectrum use.</br> 5.4 Sharing Framework</br> The Sharing Framework remains the central piece for the implementation of eLSA at national level. It defines for a</br> given frequency band the spectrum, with corresponding technical and operational conditions, that can be made available</br> for eLSA.</br> For eLSA it is intended to provide technical solutions enabling at least following aspects:</br> • Using the LSA method to include vertical sectors players.</br> • Allowing additional spectrum sharing methods like leasing/subleasing of spectrum resources. For instance, an</br> MNO may be allowed to lease/sublease out spectrum resources to a vertical sector operator operating a local</br> rd</br> MFCN or a 3 party acting on behalf of a vertical sector operator operating a local MFCN.</br> • Facilitating use of appropriate licensed frequency bands for the eLSA spectrum sharing methods.</br> • Facilitating the handling of a high number of local MFCNs.</br> • Adaptation of the LSA role concept to allow a more flexible mapping of roles to the respective operation</br> options of the evolved LSA system (i.e. evolved LSA Controller and evolved LSA repository) according to the</br> rd</br> needs of vertical sector operators. For example, a MNO may act as a 3 party to provide a repository service</br> of its spectrum resources to a MFCN operated by a vertical sector player.</br> 5.5 Spectrum Sharing Arrangement</br> The spectrum sharing arrangement concept for eLSA is based on the spectrum sharing arrangement concept for LSA in</br> ETSI TS 103 154 [i.2] and will contain additional features to deal with the new aspects for providing spectrum access to</br> local high-quality wireless networks.</br> For example, if the Sharing Framework and the sharing conditions allow for that, it is assumed that operators of MFCNs</br> may want to operate and control their local MFCNs in a detached mode, i.e. without a permanent connection to the</br> eLSA System. Thus, the spectrum sharing arrangement may contain respective practical details for a given eLSA</br> spectrum resource when used in detached mode.</br> ETSI</br> 13 ETSI TS 103 652-1 V1.1.1 (2019-02)</br> 5.6 eLSA functional enhancements</br> For providing spectrum access to local high-quality wireless networks, the current LSA framework needs to be evolve</br> on system level. Table 6 in ETSI TR 103 588 [i.1] lists an overview of identified potential functional enhancements to</br> the current LSA system and the corresponding affected LSA entities.</br> It is assumed that an eLSA system may need to handle a potentially large number of local MFCNs. It is assumed that</br> each of these local MFCNs is granted individual rights of use by the relevant NRA. This implies that the eLSA system</br> has to provide means to secure coexistence between incumbents and a potentially high number of eLSA licensees</br> according to the agreed sharing conditions.</br> The number of neighbour relations is expected to be rather stable over time, i.e. dynamic behaviour due to dynamic</br> neighbour relations is expected to be small and can be accounted for during the normal radio network planning. Thus,</br> there is no need for an automatic/network-controlled interference coordination between neighbours.</br> It is assumed that eLSA spectrum resource sharing is based on geographical sharing, i.e. the individual right of use, the</br> Sharing Framework, and/or a particular spectrum sharing arrangement defines an allowance zone within which the</br> eLSA Licensee can operate a local high-quality wireless network on the assigned frequency block/range on a non-</br> interfering basis and with predictable QoS. In this context, predictable QoS means that the network operated by the</br> eLSA Licensee can perform at a radio level in a similar way to a non-sharing case.</br> An allowance zone is defined by specific measurement quantities and thresholds, e.g. a maximum allowed signal</br> strength defined along the border of its geographical area. Based on that knowledge, the maximum allowed signal</br> strength on the border of an allowance zone can help to predict the level of interference that may be experienced from a</br> neighbour. That knowledge can be considered when planning the network deployment.</br> NOTE: Access to the public information in the NRA database/repository about licenses/leases is assumed.</br> rd</br> 5.7 eLSA system administration by trusted 3 parties</br> rd</br> It is assumed that the eLSA System or part(s) thereof may be administered by trusted 3 party user(s) with defined</br> rd</br> access rights. The new aspect for eLSA is that a eLSA Controller may be operated by a 3 party user, which acts on</br> behalf of eLSA Licensees operating a local MFCN.</br> 6 Functional system requirements</br> 6.1 General system operation</br> 6.1.0 Introduction</br> This clause comprises functional requirements that relate to the general system operation.</br> 6.1.1 R-FUNC-GEN-01 eLSA spectrum resource sharing</br> The eLSA system shall support:</br> • spectrum resource sharing in suitable licensed bands between Incumbent(s) and eLSA, according to the</br> applicable Sharing Framework automatic local area licensing of spectrum resources in suitable licensed bands</br> to eLSA Licensees, even if no Incumbent is present in the band;</br> • leasing of spectrum resources between lessors and lessees, according to the applicable eLSA Sharing</br> Framework and individual spectrum sharing arrangements.</br> Explanation: In general, spectrum assigned to Incumbent(s), may be used by MFCNs according to the</br> applicable eLSA Sharing Framework and individual spectrum sharing arrangements. The eLSA</br> System will allow an eLSA spectrum resource unused by the Incumbent (considering time, space</br> and frequency domains) to be made available in a flexible manner to the MFCN, on a non-</br> interfering basis.</br> ETSI</br> 14 ETSI TS 103 652-1 V1.1.1 (2019-02)</br> 6.1.2 R-FUNC-GEN-02 Quality of service</br> The eLSA System shall facilitate the provision of a predictable Quality of Service (QoS) for both Incumbents and</br> eLSA.</br> Licensees, whenever operation by a particular service is allowed by the system.</br> Explanation: The eLSA System supports sharing on a non-interfering basis, meaning that the sharing systems</br> will operate without causing harmful interference. Predictable QoS in this context means that a</br> system can perform in a similar way to a non-sharing case, at the radio level.</br> 6.1.3 R-FUNC-GEN-03 Information exchange between eLSA roles</br> The eLSA System shall provide means for the exchange of information between different roles, e.g. between an</br> Incumbent and/or NRA and an eLSA Licensee to enable the eLSA Licensee to be made aware of the eLSA spectrum</br> resource that is available for its use and its possible changes over time.</br> If the Sharing Framework and the sharing conditions allow for that, there is no requirement for a permanent connection,</br> i.e. no need for continuous information exchange, between an eLSA Licensee and the eLSA system.</br> Explanation: Legacy spectrum sharing arrangements are typically made in a static fashion (e.g. a secondary user</br> may use a certain portion of spectrum in a given area until told otherwise). In order for eLSA</br> spectrum resource sharing to occur in an efficient manner, the eLSA System will include efficient</br> interfacing between eLSA roles to enable changes in the available eLSA spectrum resource to be</br> communicated to the Licensee/Lessee. Operators of MFCNs may prefer spectrum sharing</br> arrangements, which allow to operate and control their networks in a detached mode, i.e. without a</br> permanent connection to the eLSA System.</br> 6.1.4 R-FUNC-GEN-04 Multiple eLSA Licensee/Lessee support</br> The eLSA System shall allow an Incumbent, NRA or lessor to interact with one or more eLSA Licensees/Lessees for</br> spectrum sharing purposes.</br> Explanation: A single Incumbent user may communicate with multiple MFCNs to provide information on the</br> eLSA spectrum resource available to each. For example, an Incumbent may have usage rights for a</br> 20 MHz band, and two MFCNs are authorized to use 10 MHz each (non-overlapping bands) as</br> eLSA Licensees. The information sent to each MFCN reflects the degree of Incumbent usage only,</br> since the eLSA System does not support contention between MFCNs. Each eLSA Licensee has an</br> individual authorization to use a particular eLSA spectrum resource, subject to a suitable grant</br> provided by the eLSA System.</br> 6.1.5 R-FUNC-GEN-05 Multiple Incumbent user support</br> The eLSA System shall allow an MFCN to interact with one or more Incumbents, lessors and/or one NRA for spectrum</br> sharing purposes.</br> NOTE: An MFCN should be able to interact directly with the NRA in frequency bands where there is no</br> incumbent.</br> Explanation: A particular MFCN may be authorized as an eLSA Licensee of different eLSA spectrum</br> resources, each shared with a particular Incumbent. For example, it may have usage rights to two</br> different sub-bands, each shared with a particular Incumbent.</br> 6.1.6 R-FUNC-GEN-06 Sharing framework support</br> The eLSA System shall support the use of a Sharing Framework as defined on national level.</br> Explanation: The Sharing Framework is described in the working assumptions (clause 5.4).</br> ETSI</br> 15 ETSI TS 103 652-1 V1.1.1 (2019-02)</br> 6.1.7 R-FUNC-GEN-07 Confidentiality of spectrum resource information</br> The eLSA System shall support mechanisms to ensure that, for a particular Sharing Framework, the information on the</br> associated available eLSA spectrum resource may only be accessed by the concerned Incumbent and/or NRA and eLSA</br> Licensee.</br> Information about the frequency allocations of neighbour licenses could be useful in fulfilling the required radio</br> conditions. This information could be used as available.</br> Explanation: The eLSA System contains information as to which entity (the Incumbent or the eLSA Licensee)</br> is allowed to use the spectrum at any given time and in any given location. In general, and unless</br> otherwise agreed, an eLSA Licensee or Incumbent may have the possibility to access information</br> concerning eLSA spectrum resources that pertain to another eLSA Licensee or that are shared with</br> different Incumbents.</br> 6.1.8 R-FUNC-GEN-08 Provision of failure indication</br> The eLSA System shall have means to provide failure indications to both the eLSA Licensee and the Incumbent,</br> following the detection of any critical system failure that may result in harmful interference.</br> Explanation: Under some circumstances, failures may occur which prevent normal operation of the eLSA</br> System. A simple example of this would be the case where information provided by the Incumbent</br> is no longer available to functions that process this information. Regardless of how such failures</br> are detected (which may be implementation dependent), the eLSA System is able to notify both</br> the eLSA Licensee and the Incumbent, so that appropriate action may be taken. Such action is</br> expected to be defined within the sharing arrangement between Incumbent and eLSA Licensee and</br> may consist of reverting to a default mode of operation by both parties if e.g. the failure is not</br> cleared within an agreed time.</br> Under detached operation, failure notification may not be possible immediately after failure</br> detection. It is expected that either the individual right of use, the Sharing Framework and/or the</br> spectrum sharing arrangement contain details on the procedure for failure indication under</br> detached operation. For instance, the MFCN operating in detached mode has to connect</br> periodically to the eLSA System in order to check for possible failure notifications.</br> Possible examples of this default mode include:</br> (i) eLSA Licensee exits the eLSA spectrum resource;</br> (ii) eLSA Licensee continues to use the last-known available eLSA spectrum resource</br> <b>...</b>