CCNP Wireless 642-747 IUWMS Summary Notes 5 : Location Tracking Techniques – Angulation (AoA / DoA)

Angulation (Angle-Based) Techniques Localization is based on the angle of the received signal. Angle of Arrival (AoA) / Direction of Arrival (DoA) AoA determines the angle of Incidence at which signals arrive at the receiving sensor. This angle is used to estimate the location of the device using the intersection of the two lines of … Continue reading CCNP Wireless 642-747 IUWMS Summary Notes 5 : Location Tracking Techniques – Angulation (AoA / DoA)

CCNP Wireless 642-747 IUWMS Summary Notes 4 : Location Tracking Techniques – Lateration (RSS)

Received Signal Strength (RSS) Localization is based on the received signal strength. The RSS is measured either by the mobile device or by the receiving sensor. The following information is needed to calculate the distance between the sensor and the device: Transmitter output power Cable losses Antenna gain Path loss model(PL) A common PL model … Continue reading CCNP Wireless 642-747 IUWMS Summary Notes 4 : Location Tracking Techniques – Lateration (RSS)

CCNP Wireless 642-747 IUWMS Summary Notes 3 : Location Tracking Techniques – Lateration (ToA and TDoA)

Distance-Based (Lateration) Techniques The tracking position is determined based on distance. The distance can be measured in three different ways: Using Time of Arrival (ToA) Using Time Difference of Arrival (TDoA) Using Received Signal Strength In ToA and TDoA, localization is based on propagation time, whereas for RSS systems, propagation is based on signal strength. … Continue reading CCNP Wireless 642-747 IUWMS Summary Notes 3 : Location Tracking Techniques – Lateration (ToA and TDoA)

CCNP Wireless 642-747 IUWMS Summary Notes 1 : Introduction to Location-Based Services

Advantages of Location-based services. Location-based services helps us to: Effectively locate assets and personnel. Improve productivity by locating effectively. Reduce unauthorized removal of assets and, thus, helps reduce losses. Improve customer satisfaction Improve WLAN planning and tuning Coordinate device location with Security policy enforcement Determine rogue device location Monitor health and status of key assets. … Continue reading CCNP Wireless 642-747 IUWMS Summary Notes 1 : Introduction to Location-Based Services

CCNP Wireless CUWSS 642-732 Summary Notes 24 : Installation Report

Post Deployment A detailed hardware requirement list should have: Wireless equipment needed Supporting infrastructure upgrades RF Validation for the installed wireless network Co channel interference and appropriate channel separation Power levels are consistent with site survey If designing for AP failover or designing to RRM RF Coverage (band by band) Roaming audit Airmagnet can be … Continue reading CCNP Wireless CUWSS 642-732 Summary Notes 24 : Installation Report

CCNP Wireless CUWSS 642-732 Summary Notes 23 : Assessing WLAN Readiness

WLAN Readiness WCS can be used to assess Wireless coverage readiness for both Location Services and VoWLAN. This however does not replace an onsite post-deployment site survey. The tools used are: Inspect VoWLAN Readiness Inspect location Readiness Both tools are launched from the map that you are viewing on WCS. Voice over WLAN Readiness WCS … Continue reading CCNP Wireless CUWSS 642-732 Summary Notes 23 : Assessing WLAN Readiness

CCNP Wireless CUWSS 642-732 Summary Notes 22 : Assessing RF Coverage

RF Audit The main objective is to verify RF Coverage. The goal is to validate or audit the current WLAN deployment in order to enhance its security and performance. Unlike pre installation site surveys, post installation surveys focus more on the entire site environment. Verify RF footprint of all installed APs. Use Ekahau Survey or AirMagnet Survey PRO. First … Continue reading CCNP Wireless CUWSS 642-732 Summary Notes 22 : Assessing RF Coverage

CCNP Wireless CUWSS 642-732 Summary Notes 21 : Infrastructure requirements Part 2

802.11n APs with 100% duty cycle: the 2,4 band when oversubscribed with clients communicating at 144 Mbps may consume up to 70 - 75 Mbps on wired side. the 5 GHz band when oversubscribed and using 40 MHz channels with clients communicating at 300 Mbps may consume up to 160 - 170 Mbps on wired side. Both … Continue reading CCNP Wireless CUWSS 642-732 Summary Notes 21 : Infrastructure requirements Part 2

CCNP Wireless CUWSS 642-732 Summary Notes 20 : Choosing Antennas

Antennas Antenna - “an intentional radiator of electromagnetic radiation. Electromagnetic field - a sine wave that has an electric component and a magnetic field component. Indoor antennas are always vertically polarized but this is not critical. Polarization plays a role in Outdoor links where a polarization mismatch can reduce the received signal by 20 dBm. Polarization … Continue reading CCNP Wireless CUWSS 642-732 Summary Notes 20 : Choosing Antennas

CCNP Wireless CUWSS 642-732 Summary Notes 19 : Infrastructure Requirements Part 1

AP Power  Options for powering the AP AP model-specific Power module (DC Power) Power Injector - combine 48-VDC power with the data signal, sending both to the access point or bridge. The AIR-PWRINJ3 power injector for Cisco Aironet 1130AG, 1140AG, and 1240AG Series Access Points works with the power supply provided with the access point. The Cisco Aironet Power … Continue reading CCNP Wireless CUWSS 642-732 Summary Notes 19 : Infrastructure Requirements Part 1