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300-425 · Question #304

In a high-density stadium deployment, which two design considerations are most important?

The correct answer is C. Sectorized directional antennas and channel reuse planning. High-density venues like stadiums require sectorized directional antennas and careful channel reuse planning to serve thousands of concurrent clients while minimizing co-channel interference.

Wireless Design

Question

In a high-density stadium deployment, which two design considerations are most important?

Options

  • AUse of high-gain omni antennas and 2.4 GHz channels
  • BCoverage overlap of 50% and fewer APs
  • CSectorized directional antennas and channel reuse planning
  • DSingle large AP with maximum transmit power

How the community answered

(44 responses)
  • A
    9% (4)
  • B
    5% (2)
  • C
    80% (35)
  • D
    7% (3)

Why each option

High-density venues like stadiums require sectorized directional antennas and careful channel reuse planning to serve thousands of concurrent clients while minimizing co-channel interference.

AUse of high-gain omni antennas and 2.4 GHz channels

High-gain omni antennas increase RF propagation in all directions, worsening co-channel interference in dense environments, and 2.4 GHz offers too few non-overlapping channels for high-density use.

BCoverage overlap of 50% and fewer APs

50% overlap is a general coverage design metric and reducing AP count would lower total capacity, which is the opposite of what high-density deployments require.

CSectorized directional antennas and channel reuse planningCorrect

Sectorized directional antennas limit each AP's coverage to a defined sector, reducing co-channel interference and allowing the same channels to be reused across adjacent sectors. Channel reuse planning ensures that overlapping cells operate on non-interfering or adequately separated channels, maximizing spatial reuse and aggregate throughput. Together these two techniques are the foundation of any high-density RF design.

DSingle large AP with maximum transmit power

A single AP at maximum transmit power cannot serve thousands of clients and high transmit power increases interference range, degrading nearby cells.

Concept tested: High-density Wi-Fi stadium design with sectorized antennas

Source: https://www.cisco.com/c/en/us/td/docs/wireless/controller/technotes/8-7/High_Density_Deploy_Guide.html

Topics

#high-density deployment#sectorized antennas#channel reuse#stadium design

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