Opportunities of Cognitive Radio Technologies for Advanced Regulatory Regimes

Transcription

1 Opportunities of Cognitive Radio Technologies for Advanced Regulatory Regimes Eiman Mohyeldin, Max Riegel (Nokia Siemens Networks) SDR 12 WInnComm Europe

2 Outline Introduction Regulatory Regimes What is Shared Spectrum Access Role of Cognitive Radio Technologies in Shared Spectrum Access Way Forward Conclusion 2 Nokia Siemens Netw orks E.M ohyeldin & M. Riegel

3 Introduction ( 1/2) Cognitive Radio in Practical Use 3 Nokia Siemens Netw orks E.M ohyeldin & M. Riegel

4 Introduction (2/2) Potential Cognitive Radio Technologies: Sensing Geo-location and access to databases Use of beacon or control channel such as CPC or CCC Possible deployment of Cognitive Radio System: In frequency bands allocated exclusively to a single service; or In frequency bands that have multiple radio communication service allocations ( shared and opportunistic access) Possible and potential applications of Cognitive Radio technologies: TV white space application To improve the management of spectrum resources In single operator case In multiple operators domain In shared access of spectrum based on dynamic spectrum access. 4 Nokia Siemens Netw orks E.M ohyeldin & M. Riegel

5 Characteristics of the different Regulatory Regimes 5 Nokia Siemens Netw orks E.M ohyeldin & M. Riegel

6 Shared Spectrum Access Shared spectrum access is where users or wireless applications are authorized to utilize the same range of frequencies on a non-exclusive basis in a defined sharing arrangement. Key Features of Spectrum Shared Access: No limitation on applications and /or technology other than those required to avoid harmful interference and to reduce the risk of interference while maintaining an acceptable quality of service ; Licensing or coordination to avoid interference to noncollective use applications or to facilitate maintaining QoS for the future. 6 Nokia Siemens Netw orks E.M ohyeldin & M. Riegel

7 Advanced regulatory Approach: Licensed Shared Access or Authorized Shared Access Licensed Shared Access ( LSA) or Authorized Shared Access ( ASA) is a framework that enable sharing of spectrum between a number of licensed users. The primary licensed user(s) or incumbent utilizing the spectrum for a specific application would share spectrum with one or several new users (ASA or LSA users) for the same or different applications in accordance with a set of conditions to be defined through regulation Key Features of ASA/ LSA: Unlock the band used by incumbent ( primary user of the band) for new users ensure predictable quality of service for all right holders sharing agreements/ conditions among incumbent and the new users LSA or ASA is not a sharing technique or a system, but ASA/LSA relies on dynamic/cognitive radio based sharing techniques (e.g. databases, sensing, ) 7 Nokia Siemens Netw orks E.M ohyeldin & M. Riegel

8 Difference between ASA/LSA and other licensing methods ASA/LSA (i.e. incumbent exists) Licensing light (no incumbent) Spectrum band owned by incumbent Band available for licensing light or Bands available to and shared by x ASA/LSAusers (x=1, 2,..., n) f u Band shared by x registered users having a General Authorisation (x=1, 2,..., n) f o temporary band of Unlicensed band ASA/LSA-user 1 ASA/LSA-user 2 Un-licensed band ASA/LSA-user 3 f u Channels actually used by incumbent (position could change over time) f o f u Band shared by x unregistered users (x=1, 2,..., ) f o 8 Nokia Siemens Netw orks E.M ohyeldin & M. Riegel

9 Other/additional dimensions of ASA/LSA: Time- and area based sharing Time Band permanently owned by incumbent Area Area licensed to incumbent temporary band of ASA/LSA-user 1 ASA/LSA-user 2 temporary area of ASA/LSA-user 1 ASA/LSA-user 2 ASA/LSA-user 3 ASA/LSA-user 3 Time-periods actually used by incumbent t a t e Parts of licensed area actually used by incumbent 9 Nokia Siemens Netw orks E.M ohyeldin & M. Riegel

10 Drivers for Licensed/Authorized Shared Access Demand of spectrum is continuously increasing Many services use their spectrum not everywhere not all the time not in the entire allocated (licensed) band Spectrum is scarce increase of overall spectrum efficiency is a must! Technical means (databases) exist to enable access to spectrum that is unused or under-utilised by the incumbent in Spatial (geographical) domain Time domain Frequency domain or any combination of the above three There seems to be no appropriate licensing method to permit cousage of unused spectrum of incumbent for a restricted number of cousers in a controlled manner guaranteeing not harmful interference to incumbent 10 Nokia Siemens Netw orks E.M ohyeldin & M. Riegel

11 Example of an ASA-Implementation using Database ( Source: Annex 2 of CRCG report to ECC WGFM) ASA licensee (IMT-operator) grant/award of ASA rights Administration/ Regulator ASA spectrum and award rules ASA Controller where/when ASA spectrum is available (Dynamic) Permission or interdiction of use of ASA spectrum ASA Repository Incumbent Spectrum use information Base station Incumbent permits use of ASA spectrum Base station Incumbent prohibits use of ASA spectrum Exclusive spectrum of IMToperator t.b.used Use of exclusive + ASA spectrum IMT-device uses spectrum according to network control 11 Nokia Siemens Netw orks E.M ohyeldin & M. Riegel

12 Way Forward To foster actions on LSA/AS different action in Regulation as well as in Standardization are required In Europe some actions have been started in the Regulation domain, need to be followed and crystallized The standardization path should allow the way to define requirements, functional architecture, protocols 12 Nokia Siemens Netw orks E.M ohyeldin & M. Riegel

13 Conclusion Cognitive technologies enable new ways to share spectrum more efficiently Dynamic spectrum access schemes are essential enabler for accessing additional spectrum Advanced regulatory approaches for spectrum authorization are needed to allow more flexibly shared use of spectrum The big advantage of ASA/LSA: Enabling Timely Availability and Licensed Use of Harmonized Spectrum for mobile services with predictable QoS With Cognitive Radio technologies such as geo-location databases ASA/ LSA would be applicable to spectrum sharing in all bands and for all kinds of applications 13 Nokia Siemens Netw orks E.M ohyeldin & M. Riegel