ETSI TS 104 011 V1.1.1 (2024-07)

Reconfigurable Radio Systems (RRS) Dynamic Spectrum Allocation Service (DSAS) System Requirements

DTS/RRS-0156Spectrum sharing

General Information

• Status: Not Published
• Technical Committee: RRS 1 - RRS System Aspects & Cognitive functionalities
• Current Stage: 12 - Citation in the OJ (auto-insert)
• Due Date: 02-Aug-2024
• Completion Date: 22-Jul-2024

Standards Content (Sample)

TECHNICAL SPECIFICATION
Reconfigurable Radio Systems (RRS);
Dynamic Spectrum Allocation Service (DSAS);
System Requirements
2 ETSI TS 104 011 V1.1.1 (2024-07)

Reference
DTS/RRS-0156Spectrum sharing
Keywords
coordination, data base, dynamic spectrum
sharing, inter-system, intra-system

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3 ETSI TS 104 011 V1.1.1 (2024-07)
Contents
Intellectual Property Rights . 4
Foreword . 4
Modal verbs terminology . 4
Introduction . 4
1 Scope . 6
2 References . 6
2.1 Normative references . 6
2.2 Informative references . 6
3 Definition of terms, symbols, and abbreviations . 7
3.1 Terms . 7
3.2 Symbols . 7
3.3 Abbreviations . 7
4 Requirement organization . 8
4.1 Requirement organization . 8
5 System overview . 9
5.1 System functional architecture . 9
5.2 Spectrum Data Base (SDB) . 9
5.3 Communication between SDB, DSAS, and S3D . 11
5.4 Certified S3D-Installer Data Base (CDB) . 12
5.5 Optional DSAS - NRA interface . 13
6 Inter-system coordination (INC) . 13
6.1 Functional requirements for inter-system coordination . 13
6.1.1 Device registration and spectrum inquiry . 13
6.1.2 Geolocation capability . 14
6.1.3 Device power and emission limits . 15
6.1.4 Security requirements . 15
6.1.5 Primary user protection . 15
6.1.6 Optional requirements for inter-system coordination . 15
6.2 Technical requirements for inter-system coordination . 16
7 Intra-system coordination (IRC) . 16
7.1 Additional functional requirements for intra-system coordination . 16
7.1.1 Non-primary user coordination . 16
7.1.2 Optional requirements for intra-system coordination . 17
7.2 Additional technical requirements for intra-system coordination . 17
7.2.1 Introduction of NPU coordination requirements. 17
Annex A (informative): Bibliography . 19
History . 20

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4 ETSI TS 104 011 V1.1.1 (2024-07)
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Foreword
This Technical Specification (TS) has been produced by ETSI Technical Committee Reconfigurable Radio Systems
(RRS).
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 Dynamic Spectrum Allocation Service (DSAS) manages spectrum access for non-primary users in frequency bands
in which spectrum sharing is applied. DSAS guarantees interference-free operation for the primary users and offers
dynamic spectrum access for non-primary users based on a situational assessment of the actual spectrum demand and
on-site spectrum occupation. Furthermore, the following scheme can be used for co-primary allocation and coordination
with the goal of effectively sharing band with guaranteed QoS.
In ETSI TR 103 885 [i.1], several use cases for temporary and flexible spectrum access are analysed and their
requirements are compared with existing spectrum sharing frameworks. The results are used as the basis for the system
requirements of the dynamic spectrum allocation service. The requirements are split into two categories:
• functional requirements that describe system behaviour under specific conditions and contain aspects of the
end user expectations;
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5 ETSI TS 104 011 V1.1.1 (2024-07)
• technical requirements that describe the features and characteristics of the system that ensure pre-defined
output performance and system's quality.

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6 ETSI TS 104 011 V1.1.1 (2024-07)
1 Scope
The present document specifies system requirements for the Dynamic Spectrum Allocation Service (DSAS) to support
dynamic, temporary, and flexible spectrum sharing in an efficient, automated, and frequency and technology agnostic
way based on the analysis introduced in ETSI TR 103 885 [i.1]. The report considers existing systems such as
Automated Frequency Coordination (AFC), evolved License Shared Access (eLSA), or Citizens Broadband Radio
Service Spectrum Access System (CBRS SAS), which could need to be adapted or simplified instead of developing a
new system from scratch. It outlines which features of the previously mentioned systems can be removed, because they
are unnecessary in the context of the intended use cases, and which features need to be added to fill identified gaps. In
addition, the frequency ranges currently covered by AFC, eLSA, and CBRS SAS will be extended to other frequency
ranges.
Functional and technical requirements of the DSAS are described and defined for two different coordination
approaches:
• Inter-system coordination (INC): a sharing framework between different communication systems, in which
Primary Users (PU) of the relevant frequency bands are protected against all users of lower tiers (i.e.
Non-Primary Users (NPUs)).NPUs access is granted without any guaranteed level of Quality of Service (QoS).
When only INC is enforced, NPUs may be requested to change their RF parameters and their overall system
performance during their operation time.
INC is comparable with the determination of available channels and its operational parameters on which a
NPU device is allowed to operate at its geographic coordinates.
• Intra-system coordination (IRC): a sharing framework in which PUs of the relevant frequency bands get
protected against all user of lower tiers (NPUs) and NPUs are getting coordinated to minimize interference
between them and to guarantee a certain level of QoS. The level of QoS experienced by the NPUs depends on
its prioritization, the current demand for spectrum, the neighboring situation, and maybe the price the user is
willing to pay.
IRC is comparable with a channel assignment/licensing including its operational parameters to NPU devices at
its geographic coordinates.
The requirements captured in the present document are described in a technology neutral manner and are applicable for
any wireless technology. DSAS enables dynamic spectrum sharing in any frequency band that is assigned for
coordinated sharing.
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.
Normative references are not applicable in the present document.
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.
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7 ETSI TS 104 011 V1.1.1 (2024-07)
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 103 885 (V1.1.2): "Reconfigurable Radio Systems (RRS); Feasibility study on existing
spectrum sharing frameworks for temporary and flexible spectrum access".
3 Definition of terms, symbols, and abbreviations
3.1 Terms
Void.
3.2 Symbols
For the purposes of the present document, the following symbols apply:
dB decibel
dBm decibel-milliwatt
dBm/kHz decibel-milliwatt per kilohertz
f center frequency
c
GHz gigahertz
h hour
kHz kilohertz
MHz megahertz
m meter
min minute
mW milliwatt
3.3 Abbreviations
For the purposes of the present document, the following abbreviations apply:
AFC Automated Frequency Coordination
B channel Bandwidth
CBRS Citizens Broadband Radio Service
CDB Certified S3D-Installer Data Base
CR Coordination Requirement
CSI Certified S3D-Installer
CSI-ID Certified S3D-Installer Identifier
DGR shared spectrum service Device General Requirement
DL Downlink
DSAS Dynamic Spectrum Allocation Service
DSQ shared spectrum service Device Security Requirement
EIRP Effective Isotropic Radiated Power
eLSA evolved Licensed Shared Access
FR Functional Requirement
GB Guard Band
I/N Interference to Noise ratio
INC Inter-system Coordination
IRC Intra-system Coordination
NPU Non-Primary User
NRA National Regulatory Administration
OOB Out-Of-Band
OP Operational Parameter
PU Primary User
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8 ETSI TS 104 011 V1.1.1 (2024-07)
QoS Quality of Service
RF Radio Frequency
S3D Spectrum Sharing Service Device
SAS Spectrum Access System
SDB Spectrum Data Base
SDB-L1 Spectrum Data Base Level 1
SDB-L2 Spectrum Data Base Level 2
SDB-L3 Spectrum Data Base Level 3SGR DSAS System General Requirement
SGR DSAS system general requirement
SNP DSAS System Non-primary user Protection
SPP DSAS System Primary user Protection
SSQ DSAS System Security Requirement
TR Technical Requirement
UL Uplink
4 Requirement organization
4.1 Requirement organization
Requirements shall be uniquely identified by: R---- with:
• : identifier of the requirement type.
Table 1: Requirements type
Code Requirement type
F Functional requirement
T Technical requirement
• : identifier of the coordination approach.
Table 2: Coordination approach
Code Coordination approach
INC Inter-system coordination
IRC Intra-system coordination
• : categorization of the requirement by using a three-digit code from Table 3.
Table 3: Requirements categorization
Code Category
DGR Shared spectrum service device general requirement
DSQ Shared spectrum service device security requirement
SGR DSAS system general requirement
SSQ DSAS system security requirement
SPP DSAS system primary user protection
SNP DSAS System Non-primary user Protection

• : unique number to identify the requirement.
• : optional and used to identify subordinate requirements, typically captured in an alphabetical list.
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9 ETSI TS 104 011 V1.1.1 (2024-07)
5 System overview
5.1 System functional architecture
An overview of the functional architecture of a DSAS system is shown in Figure 1. It includes related interfaces that
need to be specified, such as DSAS-SDB interface between DSAS and Spectrum Data Base (SDB), DSAS-S3D
interface between DSAS and Shared Spectrum Service Device (S3D), DSAS-CDB interface between DSAS and the
data base of Certified S3D-Installers (CDB), as well as an arbitrary interface that is not in scope of the present
document. There may be cases where a link to multiple SDBs is required, e.g., in national border areas. This should also
be supported.
Certified S3D-
Spectrum data base #1 Spectrum data base #2
Installer data base
(SDB) (SDB)
(CDB)
DSAS-SDB interface
DSAS #1 DSAS #2
DSAS-S3D interface
DSAS-CDB interface
S3D
Proxy
#1
Arbitrary interface
S3D S3D S3D S3D: spectrum sharing service device
#2 #3 #4 DSAS: dynamic spectrum allocation service

Figure 1: Functional architecture for spectrum sharing
The DSAS is located between the end user (here S3D) and the two data bases SDB and CDB and provides information
on the available spectrum including its restrictions to the end user and determines the validity of the S3D license.
5.2 Spectrum Data Base (SDB)
Each DSAS shall be connected to at least one SDB, connections to multiple SDBs can be required in case of e.g.
cross-national operation.
In general, the SDB supports the following different levels:
• a first level containing information on the relevant primary users (SDB-L1):
- required for protecting the PUs (INC).
• a second level containing information on the temporarily active non-primary users (SDB-L2):
- required only in case of coordinating the NPUs (IRC) otherwise optional;
- possible implementation of SDB-L2 could be a logical function within the DSAS (hence enabling a
DSAS to DSAS interface).
• a third level containing additional information on the PUs and/or NPUs, e.g. antenna patterns, operating time
(SDB-L3):
- optional;
- possible implementation of SDB-L3 could be a logical function within the DSAS.
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10 ETSI TS 104 011 V1.1.1 (2024-07)
Figure 2 depicts this approach. Each of these levels can have several instances, e.g. there could be a second level SDB
for each region.
Every second level SDB needs to be registered at the corresponding NRA who stores this information in the first level
SDB. The sequence of steps (step 1 to step 5) in the communication flow between SDB and DSAS is shown in Figure 3.
Depending on the numb
...