0wng Wpan Wlan Wwan Multi Radio Coexistence
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Transcript of 0wng Wpan Wlan Wwan Multi Radio Coexistence
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8/6/2019 0wng Wpan Wlan Wwan Multi Radio Coexistence
1/15
doc.: IEEE 802.11-07/2117r0
Submission
July 2007
Zhu & Stephens (Intel Corporation)Slide 1
WPAN/WLAN/WWAN Multi-Radio
CoexistenceDate: YYYY-MM-DD
Name Company Address Phone email
Jing Zhu IntelCorporation
+1 (503) 264-7073
Adrian Stephens IntelCorporation
+1 (503) 616-3800
Authors:
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8/6/2019 0wng Wpan Wlan Wwan Multi Radio Coexistence
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doc.: IEEE 802.11-07/2117r0
Submission
July 2007
Zhu & Stephens (Intel Corporation)Slide
AbstractThis presentation ives an overview on multi-radio
oexisten e, overin usage odel, roble , analysis,
and solution It shows that oexisten e has to onsider
both roxi ity and collocation Collo ation imposes bihallen es due to limited isolation and various interferen e
sour es Todays solutions are neither effe tive , nor
s alable with number of radios and number of vendors
Standardi ation efforts are needed to provide infor ation
service, co and, and air-interface support ne essaryfor addressin oexisten e issues
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doc.: IEEE 802.11-07/2117r0
Submission
July 2007
Zhu & Stephens (Intel Corporation)Slide
Radios on a latforUsage Radio Band
WAN
Cellular (GSM, CDMA,
GPRS)
824-894 MHz, 880 960 MHz
1770-1880 MHz, 1850-1990 MHz
UMTS (W-CDMA,
CDMA 2000, 1XEV-DV,
1XEV-DO)
1920-1980 MHz
2110 -2170 MHz
802.16 (WiMAX) 2.300 2.400 GHz
2.496 2.690 GHz
3.300 3.800 GHz
LAN 802.11 (WiFi) 2.412-2.4835 GHz
4.9 5.9 GHzPAN 802.15.1 (Bluetoot ) 2.4GHz
UWB (Wireless USB) 3.1GHz 10.6GHz
Location GPS 1.2GHz, 1.5 to 1.6 GHz
Digital Broadcast DVB-H TV 1.6 to 1.7 GHz
other names and brands may be claimed as the properties of othersother names and brands may be claimed as the properties of others
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8/6/2019 0wng Wpan Wlan Wwan Multi Radio Coexistence
5/15
doc.: IEEE 802.11-07/2117r0
Submission
July 2007
Zhu & Stephens (Intel Corporation)Slide
Coexistence Proble s
Proxi ity Path Loss Model
Collocation
OOB (out-of-band) emission /
Transmitter Noise Re eiver blo kin / desensiti ation
Inter-Modulation Produ t (IMP)
10MHz10MHz
12MHz12MHz
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doc.: IEEE 802.11-07/2117r0
Submission
July 2007
Zhu & Stephens (Intel Corporation)Slide
Coexistence Analysis
Analysis Met ods (source: IEEE 802.19-07/0003r0) Minimum Couplin Loss (MCL) the worst- ase approa h, to establish
ri id rules for minimum separation
nalysis of Random Trials- the Monte-Carlo method, to establishprobability of interferen e for a iven realisti deployment s enario
Modelling Coexistence Interference (source: IEEE 802.11-06/0338r4) Geometri nalysis (link bud et, path loss model)
pat loss odel is not accurate for odelling collocation interference
Temporal / Spe tral nalysis (hit probability)
still apply to collocation, but need to consider adjacent band
Ot er Issues
Identify / C aracterize Interference Sources: OOB emission, re eiverblo kin , Inter-Modulation (IM)
Evaluate Interference Rejection Measures: adaptive frequen yhoppin ( FH), antenna isolation, filterin
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8/6/2019 0wng Wpan Wlan Wwan Multi Radio Coexistence
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doc.: IEEE 802.11-07/2117r0
Submission
July 2007
Zhu & Stephens (Intel Corporation)Slide
Tec niqueTec nique IssuesIssues
Spectru : FCC spectru partition
/ spectru ask
insufficient in reducing interferences forproxi ity and
collocation
need refining for proxi ity coexistence
not effective for collocation coexistence
PHY: Antenna Isolation (AI), AFH,trans ission power control
(TPC), dyna ic frequency
selection (DFS), notc filtering
sacrifice perfor ance (e.g. filter reduces dyna ic range)
vendor-specific, co ponent-specific and often not
interoperable
not s alable (with number of radios)
not future ompatible, slow Time-To-Market (TTM)
additional cost and size
not effective for severe collocation coexistence proble(e.g. MCL > 55dB)
Ti e S aring (TS): Packet Traffic
Arbitration (PTA), Alternating
Wireless Mediu Access
(AWMA)
pair-wise, not scalable to nu ber of radios,
li ited application for proxi ity
less effective wit out support of wireless stacks, i.e. best-
effort
Overview of Coexistence Solutions
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8/6/2019 0wng Wpan Wlan Wwan Multi Radio Coexistence
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doc.: IEEE 802.11-07/2117r0
Submission
July 2007
Zhu & Stephens (Intel Corporation)Slide
Co ents PHY solution is not enoug :
sa rifi e trans eiver performan e (e filter redu es dynami ran e)
ost due to additional filter, and other HW
not effi ient for severe oexisten e problem
Proprietary solution does not scale:
solutions for ed to be pair-wise, vendor-specific, co ponent-specific and often
less optimal use of resour es or spe trum not s alable (with number of radios) , not future ompatible, slow TTM
example: Pa ket Traffi rbitration (PT ) widely adopted by industries
But, PT is limited: (1) radios; ( ) WiFi BT; ( ) bla k-box
Coexisten e issues between different wireless standards is addressed today as
after-t oug t, and su essfully addressin these issues requires
standardized support in t e individual standards bodies wit in a
co on fra ework.
Media Independent Coexisten e (MICE) Servi e
Coexisten e ware ir-Interfa e
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8/6/2019 0wng Wpan Wlan Wwan Multi Radio Coexistence
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doc.: IEEE 802.11-07/2117r0
Submission
July 2007
Zhu & Stephens (Intel Corporation)Slide 9
State of t e Art in IEEE Standard
1 : WP N/WL N oexisten e on GH band
1 : Coexisten e of Fixed Broadband Wireless ess Systems
1 h: Coexisten e Me hanisms for Li ense-Exempt Operation
11h: Coexisten e with military radar systems and medi al devi eson the GH band Dynami frequen y sele tion (DFS)
Transmit power ontrol (TPC)
P19 : interferen e and oexisten e analysis for NY radio systems
19: interferen e and oexisten e analysis for wireless systems
la k of standardi ed support forinfor ationservice, co ands, air-interface for multi-radio oexisten e, and often less than optimal useof resour es or spe trum!
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doc.: IEEE 802.11-07/2117r0
Submission
July 2007
Zhu & Stephens (Intel Corporation)Slide 1
Media Independent Coexistence (MICE) Service
(Concept)
MICE
Protocol and Device Hardware
Applications
TCP / IP,
radio management, etc.
WLAN WPAN WWAN
Information
ServiceCoexistence Policy
Commands
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doc.: IEEE 802.11-07/2117r0
Submission
July 2007
Zhu & Stephens (Intel Corporation)Slide 11
Co ponents of MICE Service Network Infor ation Service
useful for proximity, and need proto ol support
spe trum mask or PHY solution is apable to address the proximity ase
> dB isolation provided over the air
Radio Infor ation Service
time s hedule (start time, end time, TX / RX)
spe trum / ener y profile ( hannel width, entral frequen y, modulation, power)
trans eiver RF profile (re eiver blo kin , IP , et )
Co ands for Coordination
request: a radio to request for its TX / RX a tion
rant: the ontroller to rant the radio its request
deny: the ontroller to deny the request re ommend: the ontroller to re ommend allo ation
Coexistence Policy
priority, s hedule onfli t,
Goal: enabling /facilitating coexistence aware air-interface
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doc.: IEEE 802.11-07/2117r0
Submission
July 2007
Zhu & Stephens (Intel Corporation)Slide 1
Exa ple: Protecting 802.11 Downlink in
t e Presence of Coexistence Interference
Reduced TXOP Value
Receiver-based TXOP
reduction
CF
End
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doc.: IEEE 802.11-07/2117r0
Submission
July 2007
Zhu & Stephens (Intel Corporation)Slide 1
W at is t e benefit?
More efficient usage of wireless ediu and spectru
prevent ill- uided air-interfa e behavior
redu e frame loss
seamless intera tion amon radios
Lower cost of i ple enting coexistence solution
unified interfa e / si nalin
s ale to number of radios and number of vendors
Better user experience
support more multi-radio oexisten e usa e models
heaper / smaller devi e without sa rifi in fun tionality &
performan e
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doc.: IEEE 802.11-07/2117r0
Submission
July 2007
Zhu & Stephens (Intel Corporation)Slide 1
Conclusion
Multi-radio si ultaneous operation is beco ing t e
nor , and coexistence interference is t e li iting factor
Proximity & ollo ation
Existing approac es are ineffective la k of standard support in infor ation service, co ands, air-
interface, et , and often less optimal use of resour es or spe trum
solutions for ed to be pair-wise, vendor-specific, co ponent-
specific and NOT scale with number of radios, and number of
vendors (inter-op)
Call-for-discussion
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doc.: IEEE 802.11-07/2117r0
Submission
July 2007
Zhu & Stephens (Intel Corporation)Slide 1
References IEEE 19- / r IEEE 11- / r
IEEE P 1 Tutorial
M Konrad, W Ko h, and Hus hke, Coexisten e nalysis of
Bluetooth and Cellular UMTS in the - 9 MH Band, IEEEWCNC
Waltho, Performan e nalysis and Desi n Considerations for
Multi-Radio Platforms, Intel Developer Forum , Taipei
S Timiri, RF Interferen e nalysis for Collo ated Systems ,
Mi rowave ournal, an 199 Zhu, Waltho, X Yan , X Guo, Multi-Radio Coexisten e:
Challen es and Opportunities, IEEE ICCCN