IEEE COMMUNICATIONS MAGAZINE, JAN.,2009 資工碩二 697410070 程鈞彥
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Transcript of IEEE COMMUNICATIONS MAGAZINE, JAN.,2009 資工碩二 697410070 程鈞彥
IEEE COMMUNICATIONS MAGAZINE, JAN.,2009
資工碩二697410070程鈞彥
Architecture and Enablers for Optimized Radio Resource Usage in Heterogeneous Wireless Access Networks: The IEEE 1900.4 Working
GroupIEEE Standards in Communications and
Networking
Outline
Introduction to IEEE 1900 WGsMotivationSystem ApproachReference use casesSystem RequirementsSystem ArchitectureConclusions
Introduction to IEEE 1900 WGs
The objective of 1900 is to develop standards in the areas of dynamic spectrum access (DSA), cognitive radio(CR), interference management, coordination of wireless systems, and advanced spectrum management, among others.
IEEE Standards Coordinating Committee 41 (SCC 41), “Dynamic Spectrum Access Networks”.
Introduction to IEEE 1900 WGs
IEEE 1900 WGs 1900.1 (completed) 1900.2 (approved) 1900.3 1900.4 1900.5 1900.6
Introduction to IEEE 1900 WGs
IEEE 1900.4 IEEE 1900.4 was published on February 27th 2009. From April 2009, 1900.4 Working Group works on two
projects IEEE 1900.4a IEEE 1900.4.1
Introduction to IEEE 1900 WGs
The purpose of IEEE 1900.4 to improve overall composite capacity and quality of
service of wireless systems in a multiple radio access technologies environment, by defining an appropriate system architecture and protocols which will facilitate the optimization of radio resource usage, in particular, by exploiting information exchanged between network and mobile terminals, whether or not they support multiple simultaneous links and dynamic spectrum access.
Introduction to IEEE 1900 WGs
This purpose is achieved by defining – building blocks comprising
(i) network resource managers, (ii) device resource managers, and (iii) the information to be exchanged between the
building blocksfor enabling coordinated network-device distributed decision making which will aid in the optimization of radio resource usage, including spectrum access control, in heterogeneous wireless access networks
System Assumptions
System Approach
The two key management entities network reconfiguration manager (NRM) terminal reconfiguration manager (TRM)
Composite wireless network (CWN) The composition of a heterogeneous wireless
environment with 1900.4 management entities
Radio enabler (RE) A logical communication channel corresponding to
this interface(enabling optimization between NRM and TRM)
Reference use cases
Three use cases Dynamic spectrum assignment
provides the process and mechanisms to dynamically assign frequency bands to RANs within CWN, operating at given location and time.
Dynamic spectrum sharing provides the process and mechanisms for a type of
spectrum access that occurs when different RANs and terminals dynamically access spectrum bands that are overlapping, in whole or in part, causing less than an admissible level of mutual interference.
The distributed radio resource usage optimization use case covers the process and mechanisms by which the
optimization of radio resource usage is performed by the CWN and terminals in a distributed manner.
Reference use cases
System Requirements
Context Awareness RAN context information Terminal context information
Decision MakingNRMTRMReconfiguration
System Requirements
Reconfiguration Obtaining the context information required for
decision making Making reconfiguration decision The actual reconfiguration according to the decision
made
System Architecture
Network side entities Operator Spectrum Manager (OSM) is the entity that
enables operator to control dynamic spectrum assignment decisions of the NRM
RAN Measurement Collector (RMC) is the entity that collects RAN context information and provides it to the NRM
Network Reconfiguration Manager (NRM) is the entity that manages the CWN and terminals for network-terminal distributed optimization of radio resource usage and improvement of QoS
RAN Reconfiguration Controller (RRC) is the entity that controls reconfiguration of RANs based on requests from the NRM
System Architecture
Terminal side entities Terminal Measurement Collector (TMC) is the entity
that collects terminal context information and provides it to the TRM
Terminal Reconfiguration Manager (TRM) is the entity that manages the terminal for network-terminal distributed optimization of radio resource usage and improvement of QoS within the framework defined by the NRM and in a manner consistent with user preferences and available context information
Terminal Reconfiguration Controller (TRC) is the entity that controls reconfiguration of terminal based on requests from the TRM
System Architecture
Interfaces TMC ---- TRM TRM ---- TRC OSM ---- NRM RMC ---- NRM NRM ---- RRC NRM ---- TRM
Functional Architecture
NRM Functions Policy derivation Policy efficiency evaluation Network reconfiguration decision and control Spectrum assignment evaluation Information extraction, collection, and storage RAN selection
TRM Functions Terminal reconfiguration decision and control Information extraction, collection and storage RAN selection functions
Functional Architecture
Information Model
Uses an information model based on an object-oriented approach Policy, terminal, and CWN classes
Conclusion
This article has presented a snapshot of IEEE 1900.4, outlining its purpose, scope, reference use case, system assumptions, system architecture, information model, and other facets of the developing standard.
References
Tutorial: IEEE 1900.4 overview, http://grouper.ieee.org/groups/scc41/4/IEEE-1900.4-Overview-2009-01-07.pdf