Download C80216-10_0015

Multi-Radio Integration for Heterogeneous IEEE 802.16 Network Beyond 4G
IEEE 802.16 Presentation Submission Template (Rev. 9)
Document Number:
IEEE C802.16-10/0015
Date Submitted:
2010-03-14
Source:
I-Kang Fu, Paul Cheng
MediaTek Inc.
[email protected]
Venue:
Orlando, FL, USA
Base Contribution:
This is base contribution
Purpose:
For discussion in the Project Planning Adhoc
Notice:
This document does not represent the agreed views of the IEEE 802.16 Working Group or any of its subgroups. It represents only the
views of the participants listed in the “Source(s)” field above. It is offered as a basis for discussion. It is not binding on the contributor(s),
who reserve(s) the right to add, amend or withdraw material contained herein.
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thereof, in the creation of an IEEE Standards publication; to copyright in the IEEE’s name any IEEE Standards publication even though it
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Introduction
• Huge demand on broadband wireless access will be stimulated in 4G era
– ~1Gbps peak transmission rate in wireless network can provide users similar
experience as in wireline network
• Peak transmission rate should be no longer a critical problem after 4G era
– Most of the existing Internet services can be carried by 4G wireless networks
• Mobile Internet becomes reality and further stimulate more advanced services and
change the human life again
• The network capacity will be exhausted very soon in next few years
– The spectral efficiency is improved less than ×10, but the capacity demand is
increased more than ×100.
– The capacity will still be exhausted very soon even all the networks are
upgraded with 4G air-interface
• Capacity exhaustion will be the most severe problem during the 4G and
Beyond (B4G) era
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Introduction
• Different candidate technologies can possibly help on capacity
improvement
–
–
–
–
Heterogeneous network
Cooperative techniques
Advanced MIMO
etc.
• Heterogeneous network may be the most promising candidate technology
– The room for intra-system optimization (i.e. further increase spectral
efficiency) will be bounded by multiple access interference (e.g. inter-cell)
– However, the spectrum resources today are not efficiently utilized because
different network may not be able to share spectrum resources with each other.
• Because the traffic and network loading distribution is time variant, but operator
need to deploy the network base on worse case.
• This problem may be resolved without change of PHY but mostly by MAC
enhancement
3
Problem Discussion
• Multiple radio access networks between information source and user
– May be operated by the same air-interface (e.g. different operators)
• Single tier network → can be resolved by existing roaming solution
– May be operated by different air-interfaces
• Heterogeneous network → new technologies are required to enable radio resource
sharing
Information Source
Multi-Tiers Radio Access Network
(e.g. Internet)
User Terminal
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Problem Discussion
•
Two design perspective need to be considered when discussing
heterogeneous network problems:
1.
2.
•
Network perspective
Device perspective
Technology evolution may be categorized into three stages: (example)
1.
Coexistence
•
Interference mitigation
2.
Cooperation
•
Smart Internetworking
3.
Cognition
•
Internetwork radio resource sharing
5
Multi-Radio Integration Challenges
• Challenges to support heterogeneous network from device perspective
– Stage 1: Interference mitigation for co-located multi-radio coexistence
• Objective – mitigate the interference from co-located modem to improve modem
performances
– FDM based solution (i.e. filtering) may not work when the frequency channels are too
close (e.g. between ISM band and 2.3GHz band)
– Protocol based solution may be required under some scenario
– Ongoing efforts in many different standard organizations
ANT#2
ANT#1
Interference to Modem#1
from Modem#2
Interference to Modem#2
from Modem#1
RF#1
BB#1
BB#2
RF#2
BB: Baseband module
RF: Radio Frequency module
ANT: Antenna module
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Multi-Radio Integration Challenges
• Challenges to support heterogeneous network from device perspective
– Stage 2: Smart interworking for co-located multi-radio component sharing
• Objective – efficient internetworking to help device maintain connections in
multiple systems by shared hardware (e.g. RF module)
– For example, new protocol to help device fast switching between two system without
losing control signals.
– Maintain logical connection may still be maintained in parallel if necessary
System #1
(Carrier#1)
ANT#1
ANT#2
System #2
(Carrier#2)
Receive control signal in system #1
Receive data in system #2
Common
RF
BB#1
BB#2
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Multi-Radio Integration Challenges
• Challenges to support heterogeneous network from device perspective
– Stage 3: Intelligent spectrum sharing for cognition by fully integrated radio
• Objective – optimize the radio (spectrum) resources among multi-tier
heterogeneous network by minimizing the duplicated hardware functions (FFS)
– Prevent unnecessary waste on spectrum resource, transmit power and processing power.
Carrier#1
ANT#1
ANT#2
Carrier#2
Receive control signal from System #1
in Carrier#1
Receive data from System #1 in
Carrier#2
Common
RF
Common
BB
Other traffic from System #1 in
Carrier#1
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Summary
• Heterogeneous Network is the most promising technology which can
significantly resolve the capacity exhaustion problem in Beyond 4G era
– New technology need to be developed both from network and device
perspectives
• Development task may be categorized into multiple stages
– Stage 1: Multi-radio & Heterogeneous Network Coexistence
– Stage 2: Multi-radio & Heterogeneous Network Cooperation
– Stage 3: Multi-radio & Heterogeneous Network Cognition
• Recommendation
– Consider the requirements both from multi-radio network and device
perspectives within the scope of new project
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