102L7design - A Technical Introduction to Wireless Chapter...

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October, 1997 Technical Introduction to Wireless -- 102 -- (c) 1997 Scott Baxter - V1.0 7 - 1 Cell Design for Wireless Systems Cell Design for Wireless Systems A Technical Introduction to Wireless Chapter 7
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October, 1997 Technical Introduction to Wireless -- 102 -- (c) 1997 Scott Baxter - V1.0 7 - 2 Basic Network Objectives n The basic basic objectives of a wireless system are: COVERAGE: provide sufficient cells to deliver RF coverage of the entire desired area BUILDING/VEHICLE PENETRATION: deliver sufficient signal levels to adequately penetrate buildings and vehicles where appropriate TRAFFIC: ensure that no cell captures more traffic than it can handle at the desired grade of service (i.e., blocking percentage) SCHEDULE: construct the network and bring it to successful commercial launch at a date which will prevent significant loss of potential customers to competitors PERFORMANCE: design, construct, and adjust the network to deliver reliable service free from excessive origination and call delivery failures, dropped calls, quality impairments, and service outages ECONOMICS: provide return on investment sufficient to support operating and capital expenses, expand the network to take advantage of growth opportunities, and retire costs of construction prior to depreciation of the network equipment
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October, 1997 Technical Introduction to Wireless -- 102 -- (c) 1997 Scott Baxter - V1.0 7 - 3 General Design Considerations and Examples n Network design impacts every network objective listed on the previous page. The first three items actually drive successful network designs, while the final three are largely results of a good network design. n The following design example in a typical large market shows the high-level planning and decision-making that goes into successful network design, and provides data to illustrate the tradeoffs involved. n A spreadsheet file will be provided on diskette by your instructor for your own interactive use in exploring a test network design for your own market
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October, 1997 Technical Introduction to Wireless -- 102 -- (c) 1997 Scott Baxter - V1.0 7 - 4 Lesson 8 System Design Example
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October, 1997 Technical Introduction to Wireless -- 102 -- (c) 1997 Scott Baxter - V1.0 7 - 5 Example Contents n High level design example Inputs/Demographics Methods Outputs n Cell planning examples Morphologies Traffic model Cell database Composite coverage plot Equal power handoff boundaries plot PN offset plan
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October, 1997 Technical Introduction to Wireless -- 102 -- (c) 1997 Scott Baxter - V1.0 7 - 6 Overall System Design Example n Imagine you’ve been selected to design a wireless system for the Dallas-Fort Worth metroplex in Texas, USA. CDMA technology has been chosen. The new system must satisfy the coverage, penetration, and traffic objectives described in following slides n A: The high-level design results include: A high level number-of-cells plan for the overall system n B: The cell plan includes (demo limited to one area of system): Details of the demographic and morphological zones and propagation models
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102L7design - A Technical Introduction to Wireless Chapter...

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