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HUAWEI TECHNOLOGIES Co., Ltd. HUAWEI Confidential

The Way to Cognitive Spectrum Management

HUAWEI TECHNOLOGIES CO., LTD. Huawei Confidential

Contents

The Current State of Spectrum Management1

2

3

4

The Challenge of Spectrum Management

Existing Scheme of Cognitive Spectrum Management

Some Views on TV White Space

5 The Way to Cognitive Spectrum Management


Fixed Spectrum Allocation

Source: http://www.baisi.net/viewthread.php?tid=1332118


Spectrum Usage Measurements Averaged over Six Locations [American]

Source: Amir Ghasemi, et. al, Spectrum sensing in cognitive radio networks: requirements, challenges and design trade-offs, IEEE communications magazine, Apr. 2008,pp. 32-39

The relatively low utilization of the licensed

spectrum suggest that spectrum scarcity is

largely due to inefficient fixed frequency

allocations rather than any physical shortage of

spectrum


Contents


2

3

4






Spectrum Opportunistic


Cognitive Cycle

Source: Ian F. Akyildiz, et. al, NeXt generation/dynamic spectrum access/cognitive radio wireless networks: A survey, Elsevier Computer Networks, May. 2006, pp. 2127-2159


Utilization of Spectrum Opportunistic

Overlay

› Just utilize spectrum

opportunistic which

primary users is unused in

temporal, frequency and

spatial

Underlay

› Limited transmit power to

avoid interference to

users including primary

users or other secondary

users.


Contents


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FP7 Project : E3

›design, develop, prototype

and showcase solutions to

guarantee interoperability,

flexibility and scalability

between existing legacy and

future wireless systems

›manage the overall system

complexity

›ensure convergence across

access technologies, business

domains, regulatory domains

and geographical regions

商业与系统模型研究认知系统的管理功能

原型验证

Source: https://ict-e3.eu/


IEEE SCC41

OSM-Operator Spectrum ManagerNRM-Network Reconfiguration ManagerTRM-Terminal Reconfiguration Manager


IEEE SCC41 Use Cases: Dynamic spectrum assignment

Single Operator Scenario



Multiple Operator Scenario( NRM is inside operators)



Multiple Operator Scenario( NRM is outside operators)


IEEE SCC41 Use Cases: Dynamic spectrum sharing


IEEE SCC41 Use Cases: Distributed radio resource usage optimization


Contents


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FCC

On 4 November 2008, the FCC adopted a report setting out rules allowing

license-exempt cognitive devices to operate in interleaved spectrum

Cognitive parameter Value

DTT sensing -114 dBm

Wireless-microphone sensing -114 dBm

Location accuracy 50 meters

Transmit power - adjacent channels 40 mW

Transmit power - non-adjacent channels 100 mW

Out-of-band powers 55 dBc

Time between sensing 1 minute


OFCOM

On 16 February 2009, OFCOM releases the document “Digital dividend:

cognitive access-Consulation on licence-exempting cognitive devices using

interleaved spectrum”.

›Allow cognitive access as long as we were satisfied that it would

not cause harmful interference to licensed uses

Cognitive parameter Value

DTT sensing -114 dBm

Wireless-microphone sensing -126dBm

Location accuracy 100 meters

Transmit power - adjacent channels 20 mW

Transmit power - non-adjacent channels 100 mW

Out-of-band powers <-44 dBm

Time between sensing 1 second


Europe Commission

Task Group 4 of the European conference of Postal

and Telecommunications administrations (CEPT) work

on a pan-European specification for cognitive devices. This work is currently at an early state. The outcome of OFCOM will contribute to this work.


Contents


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View from Some Regulators



Cognitive Spectrum Management

Observing

Deciding

Reacting

Learning

Cognitive Spectrum

Management Cycle

To observe the surrounding environment and recognize

To identify causal or correlative connections and makes rational decisions

To adapt the corresponding means

To manipulate the knowledge from experience and lessons and augment the list available actions to the system


Cognitive Dimension

Spectrum Resource•Licensed spectrum band

• TV band• Cellular spectrum

band• Etc

•Unlicensed spectrum band

• ISM band

CognitiveDimension

Cognitive Access•Sensing•Geolocation Database•Beacon reception

Cognitive Parameter•Sensing parameters•Geolocation parameters•Etc.

Cognitive Policy…


Cognitive Access Spectrum

Phase 1Phase 1 Phase 2Phase 2 Phase 3Phase 3

Cognitive access to the TV White Space

Spectrum allocation policy update

•Reservation special spectrum band (such as military use)

•Dynamic spectrum access for all band of business use

Cognitive access to other White Space (except for special

spectrum band such as military )

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Documents

huawei confidential

spectrum opportunistic

licensed spectrum

spectrum scarcity

spectrum usage measurements

physical shortage of

access technologies

cognitive cycle source