nextel ppt
TRANSCRIPT
![Page 1: Nextel ppt](https://reader034.vdocuments.us/reader034/viewer/2022050922/55a4db051a28ab0e398b46d4/html5/thumbnails/1.jpg)
NCAR & Nextel
Presented by
Del Harris
Bryan Anderson
![Page 2: Nextel ppt](https://reader034.vdocuments.us/reader034/viewer/2022050922/55a4db051a28ab0e398b46d4/html5/thumbnails/2.jpg)
Covered Today
• History of Mobile Communication• Cellular at NCAR• Current Issues• Future Possibilities
![Page 3: Nextel ppt](https://reader034.vdocuments.us/reader034/viewer/2022050922/55a4db051a28ab0e398b46d4/html5/thumbnails/3.jpg)
History of Mobile Telephone Service
• 1946 Mobile Telephone Service introduced (MTS).
• 1947 First concept design of cellular in by AT&T• 1958 & 1968 AT&T petitioned for frequencies in
the 800MHz and up bands.• 1964 IMTS was introduced.• 1969 AT&T built a one dimensional cell system.
![Page 4: Nextel ppt](https://reader034.vdocuments.us/reader034/viewer/2022050922/55a4db051a28ab0e398b46d4/html5/thumbnails/4.jpg)
History of Mobile Telephone Service (Cont)
• 1970 FCC requests AT&T to build first cellular mobile vehicle prototype system for allocation bandwidth justification.
• 1973 Motorola demonstrated first portable mobile phone handset.
• 1982 AT&T is notified by justice department to split apart.
• 1983 FCC completes spectrum allocation for cellular 800Mhz A&B bands.
![Page 5: Nextel ppt](https://reader034.vdocuments.us/reader034/viewer/2022050922/55a4db051a28ab0e398b46d4/html5/thumbnails/5.jpg)
History of Mobile Telephone Service (Cont)
• 1983 simultaneously AT&T and Motorola build first competing Advanced Mobile Phone Service (AMPS) cellular systems G1.
• 1984 AT&T relinquishes Bell System’s Wireless.• 1989 Time Division Multiple access TDMA
introduced.• 1995 Code Division Multiple access CDMA
introduced.• 1996 Nokia introduces first handheld
Phone/Computer.
![Page 6: Nextel ppt](https://reader034.vdocuments.us/reader034/viewer/2022050922/55a4db051a28ab0e398b46d4/html5/thumbnails/6.jpg)
Early Cellular Concept Overview
![Page 7: Nextel ppt](https://reader034.vdocuments.us/reader034/viewer/2022050922/55a4db051a28ab0e398b46d4/html5/thumbnails/7.jpg)
Cellular at NCAR
![Page 8: Nextel ppt](https://reader034.vdocuments.us/reader034/viewer/2022050922/55a4db051a28ab0e398b46d4/html5/thumbnails/8.jpg)
NETS: Cellular Transition
• Early methods– Pager coverage/response issues– Bulky licensed radio’s
• Cellular’s attractive features– Nation wide mobile phone access– Push to Talk (PTT) – Data features
![Page 9: Nextel ppt](https://reader034.vdocuments.us/reader034/viewer/2022050922/55a4db051a28ab0e398b46d4/html5/thumbnails/9.jpg)
Adopted Nextel Solution• Nextel pluses
– Unique PTT feature handy– Good nationwide major Metropolitan coverage
• Nextel shortfalls – Internal building coverage– Nationwide coverage inconsistent– Rural coverage – Lack of roaming
![Page 10: Nextel ppt](https://reader034.vdocuments.us/reader034/viewer/2022050922/55a4db051a28ab0e398b46d4/html5/thumbnails/10.jpg)
Nextel ML Building Coverage Solution
• Approached Nextel directly.– Nextel did ML Site evaluation.– Nextel Solution costly.– Acquired Nextel Design Implementation
• Evaluated Nextel Solution– Acquired few basic system components.– Evaluated components – Acquire & Install Phase 1 products– Acquire & Install Phase 2 products– Expand coverage areas
![Page 11: Nextel ppt](https://reader034.vdocuments.us/reader034/viewer/2022050922/55a4db051a28ab0e398b46d4/html5/thumbnails/11.jpg)
New Nextel SMR800 System
• Systems Specifications– SMR800 Single Band limited
• Repeaters• Antenna
– Open Band components limits• Combiner/dividers .8-2.3GHz• Directional Couplers .8-2.3GHz• Lightning Protector .7-2.7GHz• Cabling .03-5.8GHz
![Page 12: Nextel ppt](https://reader034.vdocuments.us/reader034/viewer/2022050922/55a4db051a28ab0e398b46d4/html5/thumbnails/12.jpg)
Nextel Network Testing
• Spectrum Analyzer• iDEN internal handset diagnostic mode.
– Diagnostic Access code i836 Keys:• Press #Key,*Key, Menu Key, and Right Arrow
Key sequence in less than 5 seconds.• Phone will enter “Trace Mode” Menu• Two Operational Diagnostic modes
![Page 13: Nextel ppt](https://reader034.vdocuments.us/reader034/viewer/2022050922/55a4db051a28ab0e398b46d4/html5/thumbnails/13.jpg)
ML System Diagram
• ML Nextel SMR800.dwg
![Page 14: Nextel ppt](https://reader034.vdocuments.us/reader034/viewer/2022050922/55a4db051a28ab0e398b46d4/html5/thumbnails/14.jpg)
Additional Nextel Building Site Installations
• Design: Pseudo Complete– ML– FL4– FL3
• Design: Inherited Partial Installs– CG1– FL2
![Page 15: Nextel ppt](https://reader034.vdocuments.us/reader034/viewer/2022050922/55a4db051a28ab0e398b46d4/html5/thumbnails/15.jpg)
Future Nextel Site Installations
• Pending sites– FL0– FL1– CG2– CG3– Jeffco– Marshall
![Page 16: Nextel ppt](https://reader034.vdocuments.us/reader034/viewer/2022050922/55a4db051a28ab0e398b46d4/html5/thumbnails/16.jpg)
Issues
![Page 17: Nextel ppt](https://reader034.vdocuments.us/reader034/viewer/2022050922/55a4db051a28ab0e398b46d4/html5/thumbnails/17.jpg)
ML Nextel Building System Issues
• Ongoing – Building to system call handoffs– Difficult Coverage
• Small nodes• Exterior areas
• New – Nextel Frequency Re-band
• Building Network wide upgrade needed
– Nextel/Sprint Merger
![Page 18: Nextel ppt](https://reader034.vdocuments.us/reader034/viewer/2022050922/55a4db051a28ab0e398b46d4/html5/thumbnails/18.jpg)
Sprint/Nextel Merger
• Sprint acquired Nextel– Two different Technologies– Two different Bands
• Nextel’s future?– Frequency band
![Page 19: Nextel ppt](https://reader034.vdocuments.us/reader034/viewer/2022050922/55a4db051a28ab0e398b46d4/html5/thumbnails/19.jpg)
Basic Frequency Re-band Graphic
![Page 20: Nextel ppt](https://reader034.vdocuments.us/reader034/viewer/2022050922/55a4db051a28ab0e398b46d4/html5/thumbnails/20.jpg)
Nextel Reband Zones
![Page 21: Nextel ppt](https://reader034.vdocuments.us/reader034/viewer/2022050922/55a4db051a28ab0e398b46d4/html5/thumbnails/21.jpg)
Nextel Reband Timeline
![Page 22: Nextel ppt](https://reader034.vdocuments.us/reader034/viewer/2022050922/55a4db051a28ab0e398b46d4/html5/thumbnails/22.jpg)
Nextel Network Dependency
• Life Safety• CISL
– NETS– ESS– HPS
• UCAR– PPS
![Page 23: Nextel ppt](https://reader034.vdocuments.us/reader034/viewer/2022050922/55a4db051a28ab0e398b46d4/html5/thumbnails/23.jpg)
Possible Solutions
![Page 24: Nextel ppt](https://reader034.vdocuments.us/reader034/viewer/2022050922/55a4db051a28ab0e398b46d4/html5/thumbnails/24.jpg)
Nextel SMR900 Solution 1
• ML Nextel SMR900&900 Option 1.dwg
![Page 25: Nextel ppt](https://reader034.vdocuments.us/reader034/viewer/2022050922/55a4db051a28ab0e398b46d4/html5/thumbnails/25.jpg)
Nextel SMR900 Solution 2
• ML Nextel SMR800&900 Option 2.dwg
![Page 26: Nextel ppt](https://reader034.vdocuments.us/reader034/viewer/2022050922/55a4db051a28ab0e398b46d4/html5/thumbnails/26.jpg)
NCAR Cellular Solutions
• Correct Nextel Issues• Correct Nextel Issues & Install Second
Vendor Solution• Abandon Nextel & Install New Vendor
Solution– Cellular– VOIP/Cellular
![Page 27: Nextel ppt](https://reader034.vdocuments.us/reader034/viewer/2022050922/55a4db051a28ab0e398b46d4/html5/thumbnails/27.jpg)
Upgrade Present System
• Pro’s– Existing Nextel users
not displaced– SMR 900 dead air &
drop calls will be eliminated.
• Con’s– Complete System
replacement, minus media, costly.
– Live with present system pitfalls
– Nextel uncertain future
![Page 28: Nextel ppt](https://reader034.vdocuments.us/reader034/viewer/2022050922/55a4db051a28ab0e398b46d4/html5/thumbnails/28.jpg)
Correct Nextel Issues & Install Second Vendor Solution
• Pro’s – Dual system
redundancy/options– Existing Nextel users
not displaced– Overcome Nextel
Nationwide short falls
• Con’s– Complete Nextel
System overhaul minus media replacement costly
– Complete Second System Installation required.
– Possibility of Dual System Interference
– Nextel uncertain future
![Page 29: Nextel ppt](https://reader034.vdocuments.us/reader034/viewer/2022050922/55a4db051a28ab0e398b46d4/html5/thumbnails/29.jpg)
Abandon Nextel & After Installation of a New Vendor Solution
• Pro’s– Overcome Nextel
Nationwide short falls– No further investment
in present systems.
• Con’s– All UCAR users will
need to buy in.– New system
technology and installation costs an unknown at this time.
![Page 30: Nextel ppt](https://reader034.vdocuments.us/reader034/viewer/2022050922/55a4db051a28ab0e398b46d4/html5/thumbnails/30.jpg)
New FCC Public Safety Building Coverage Issues
• Public Safety – First Responder Communications
• 200 Cities have already adopted.
• Present SMR800 system partially accommodates Public Safety.– Future may include 700MHz.
![Page 31: Nextel ppt](https://reader034.vdocuments.us/reader034/viewer/2022050922/55a4db051a28ab0e398b46d4/html5/thumbnails/31.jpg)
FCC & Cellular Vendor Concerns over in Building Repeaters
• FCC – Interference
• Vendor– Interference– Experienced personnel– Maintained
![Page 32: Nextel ppt](https://reader034.vdocuments.us/reader034/viewer/2022050922/55a4db051a28ab0e398b46d4/html5/thumbnails/32.jpg)
American Signal Multiplexing Methods
• TDMA is TDM based• GSM is TDM based• iDEN Nextel is TDM based • CDMA by Qualcomm Technologies
![Page 33: Nextel ppt](https://reader034.vdocuments.us/reader034/viewer/2022050922/55a4db051a28ab0e398b46d4/html5/thumbnails/33.jpg)
Wireless Voice: The Skies the limit
• Conclusion:– Knowns
• We need to define what are OUR requirements are!– Voice
» In Building!» Nation Wide!» Rural!» PTT?
– Data?
![Page 34: Nextel ppt](https://reader034.vdocuments.us/reader034/viewer/2022050922/55a4db051a28ab0e398b46d4/html5/thumbnails/34.jpg)
Wireless Voice: The Skies the limit (Cont)
• Conclusions:– Unknowns
• Selected systems technology• Selected systems band • Selected system longevity• Selected systems shortfalls
![Page 35: Nextel ppt](https://reader034.vdocuments.us/reader034/viewer/2022050922/55a4db051a28ab0e398b46d4/html5/thumbnails/35.jpg)
Comments