Source: https://patents.google.com/patent/US8768371B2/en
Timestamp: 2019-11-11 21:21:33
Document Index: 775421661

Matched Legal Cases: ['Application No. 2009300250', 'Application No. 2009300250', 'Application No. 2009300250', 'Application No. 2009300250', 'Application No. 2728838', 'Application No. 2728838', 'application No. 2728838', 'application No. 2728838']

US8768371B2 - Method and apparatus for optimizing spectrum utilization by a cognitive radio network - Google Patents
US8768371B2
US8768371B2 US13/368,104 US201213368104A US8768371B2 US 8768371 B2 US8768371 B2 US 8768371B2 US 201213368104 A US201213368104 A US 201213368104A US 8768371 B2 US8768371 B2 US 8768371B2
US13/368,104
US20120238309A1 (en
2012-02-07 Application filed by Motorola Solutions Inc filed Critical Motorola Solutions Inc
2012-02-07 Priority to US13/368,104 priority patent/US8768371B2/en
2012-05-30 Assigned to MOTOROLA SOLUTIONS, INC. reassignment MOTOROLA SOLUTIONS, INC. ASSIGNMENT OF ASSIGNORS INTEREST (SEE DOCUMENT FOR DETAILS). Assignors: CHAUDHRI, APOORV, GURNEY, DAVID P., KUFFNER, STEPHEN L., RAO, YADUNANDANA N., SIMMS, MATTHEW E.
2012-09-20 Publication of US20120238309A1 publication Critical patent/US20120238309A1/en
2014-07-01 Publication of US8768371B2 publication Critical patent/US8768371B2/en
238000001228 spectrum Methods 0 abstract claims description title 45
The present application is a Divisional Application of, and claims priority of U.S. application Ser. No. 12/241,821, entitled METHOD AND APPARATUS FOR OPTIMIZING SPECTRUM UTILIZATION BY A COGNITIVE RADIO NETWORK, filed Sep. 30, 2008, and assigned to Motorola Solutions, Inc.
TABLE I Secondary Secondary Secondary BS 1 BS 2 BS 3 Channel Ranking Criteria Channel (N − 1) Channel (N) (N + 1) Maximum allowed 30 dBm 10 dBm 40 dBm TX Power of BS Measured RSSI at −70 dBm −75 dBm −90 dBm MS (from BS) Estimated Path Loss 100 dB 85 dB 130 dB Required TX Power 20 dBm 5 dBm 50 dBm of MS (>max) Rank 2 1 3
RSSI MS =EIRP BS −PL=P TX,BS +G TXA,BS +G RXA,MS −PL
PL=(P TX,BS +G TXA,BS)+G RXA,MS −RSSI MS
RSSI TGT,BS =P TX,MS +G TXA,MS +G RXA,BS −PL,
RSSI TGT,BS =P TX,MS +G TXA,MS +G RXA,BS −P TX,BS −G TXA,BS −G RXA,MS +RSSI MS
P TX,MS =RSSI TGT,BS −G TXA,MS −G RXA,BS +P TX,BS +G TXA,BS +G RXA,MS −RSSI MS
RSSI TGT,BS =C/I TGT,BS+(N+I)BS
SINR ch=[EIRPch −PL]/[P N+Ich]
LB est,ch =EIRP ch −P N+I,ch
While systems exist that detect and mitigate interference using power control and iterative transmit power updates, none of these existing systems have ranked base stations and provided for the selection of an optimum base station based on location and environmental conditions in order to avoid interference to incumbents while operating in their spectrum. Nor have these past systems adapted the rankings based on location and/or sensing while operating in a spectrum on secondary basis where the incumbents limit the maximum allowed transmit power and the operating region of the base stations and the mobiles. While operating in primary'spectrum, the mobile subscriber operating in accordance with the embodiments of the invention adapts operating parameters and selects secondary base stations for operation not only based on the signal quality of the base stations, but also based on the interference generated to the incumbents due to its operation.
the secondary subscriber selecting one of the plurality of secondary base station channels for operation within the primary system's spectrum based on secondary base station rankings, the secondary base station rankings being based on a maximum allowed transmit power level or an estimated link budget in conjunction with active or passive channel measurements of the secondary system,
wherein the active channel measurements being based on maximum allowed transmit power levels of each secondary base station and measured power level of the secondary subscriber, the passive channel measurements being based on an estimated link budget determined from allowed transmit power levels of each secondary base station and measured power levels at each secondary base station,
wherein the database containing regulation and geo-location information pertaining to the primary system further includes location information pertaining to mobility of the secondary subscriber, the database further providing updated regulatory and spectrum information based on change in location of the secondary subscriber thereby enabling the secondary subscriber to switch secondary base station channels based at least on the updated regulatory and spectrum information.
2. The communication system of claim 1, wherein the secondary system comprises a public safety network seeking to utilize TV white space spectrum.
3. The communication system of claim 1, wherein the secondary base station rankings are periodically updated in response to mobility of the secondary subscriber.
US13/368,104 2008-09-30 2012-02-07 Method and apparatus for optimizing spectrum utilization by a cognitive radio network Active US8768371B2 (en)
US12/241,821 Division US8140085B2 (en) 2008-09-30 2008-09-30 Method and apparatus for optimizing spectrum utilization by a cognitive radio network
US20120238309A1 US20120238309A1 (en) 2012-09-20
US8768371B2 true US8768371B2 (en) 2014-07-01
JP5747119B2 (en) * 2011-03-27 2015-07-08 エルジー エレクトロニクス インコーポレイティド Service switching method for managed devices that service networks or devices
KR20140129007A (en) 2012-02-08 2014-11-06 엘지전자 주식회사 Method and apparatus for transceiving signals in wireless communication systems
CN108076467A (en) * 2017-12-29 2018-05-25 中国人民解放军陆军工程大学 Frequency spectrum resource be limited under broad sense sensor model and distributed Q-learning cut-in method
US20060171305A1 (en) 2005-02-03 2006-08-03 Autocell Laboratories, Inc. Access point channel forecasting for seamless station association transition
Corresponding Australian Application No. 2009300250-Notice of Allowance dated Nov. 21, 2012.
Corresponding Australian Application No. 2009300250—Notice of Allowance dated Nov. 21, 2012.
Corresponding Australian Application No. 2009300250-Office Action issued Sep. 26, 2012.
Corresponding Australian Application No. 2009300250—Office Action issued Sep. 26, 2012.
Corresponding Canadian Application No. 2728838-Office Action dated Aug. 14, 2013.
Corresponding Canadian Application No. 2728838—Office Action dated Aug. 14, 2013.
Corresponding Canadian application No. 2728838-Office Action dated Mar. 15, 2013.
Corresponding Canadian application No. 2728838—Office Action dated Mar. 15, 2013.
International Preliminary Report on Patentability dated Apr. 5, 2011 in counterpart International Application No. PCT/ US2009/054720.
International Search Report with Written Opinion-PCT/US2009/054720 (Corresponding International Applciation), mailed Mar. 30, 2010-11 pages.
International Search Report with Written Opinion—PCT/US2009/054720 (Corresponding International Applciation), mailed Mar. 30, 2010—11 pages.
Non Final Office Action mailed on Oct. 11, 2011 in counterpart U.S. Appl. No. 12/241,821, filed Sep. 30, 2008.
Notice of allowance mailed on Feb. 3, 2012 in counterpart U.S. Appl. No. 12/241,821, filed Sep. 30, 2008.
Takeo Fujii et al-"mMulti-Bank ad-Hoc Cognitive Radio for reducing Inter System Interference"-The 17th Annual IEEE International symposium on PIMRC 2006, Sep. 11-14, 2006-pp. 1-5.
Takeo Fujii et al—"mMulti-Bank ad-Hoc Cognitive Radio for reducing Inter System Interference"—The 17th Annual IEEE International symposium on PIMRC 2006, Sep. 11-14, 2006—pp. 1-5.
US20100081449A1 (en) 2010-04-01
Free format text: ASSIGNMENT OF ASSIGNORS INTEREST;ASSIGNORS:CHAUDHRI, APOORV;GURNEY, DAVID P.;KUFFNER, STEPHEN L.;AND OTHERS;REEL/FRAME:028290/0504