Cisco Cisco Cius 4G 디자인 가이드
Cisco Cius Wireless Deployment Guide
7
Cisco Cius Overview
Cisco Cius is the platform that provides mobile collaboration within enterprises. It brings together the capabilities of Cisco
Unified Communication applications, building upon the solid foundations of Cisco Unified Communications devices, both
wired and wireless. The levels of multimedia performance that have come to be expected from Cisco products are maintained in
Cisco Cius with the introduction of 802.11n data rates and the inclusion of Cisco Compatible eXtensions (CCX).
Cisco's implementation of 802.11, employing CCX, permits time sensitive applications such as voice and video to operate
efficiently across campus wide wireless LAN (WLAN) deployments. These extensions provide fast roaming capabilities and an
almost seamless flow of multimedia traffic, whilst maintaining security as the end user roams between access points.
It should be understood that WLAN uses unlicensed spectrum, and as a result it may experience interference from other devices
using the unlicensed spectrum. The proliferation of devices in the 2.4 GHz spectrum, such as Bluetooth headsets, Microwave
ovens, cordless consumer phones, means that the 2.4 GHz spectrum may contain more congestion than other spectrums. The 5
GHz spectrum has far fewer devices operating in this spectrum and is the preferred spectrum to operate Cisco Cius in order to
take advantage of the 802.11n data rates available. Despite the optimizations that Cisco have implemented in Cisco Cius, the
use of unlicensed spectrum means that uninterrupted communication can not be guaranteed, and there may be the possibility of
voice or video gaps of up to several seconds during multimedia conversations. Adherence to the deployment guidelines will
reduce the likelihood of these voice and video gaps being present, but there is always this possibility. Through the use of
unlicensed spectrum, and the inability to guarantee the delivery of messages to a WLAN device, Cisco Cius is not intended as a
medical device and should not be used to make clinical decisions.
Unified Communication applications, building upon the solid foundations of Cisco Unified Communications devices, both
wired and wireless. The levels of multimedia performance that have come to be expected from Cisco products are maintained in
Cisco Cius with the introduction of 802.11n data rates and the inclusion of Cisco Compatible eXtensions (CCX).
Cisco's implementation of 802.11, employing CCX, permits time sensitive applications such as voice and video to operate
efficiently across campus wide wireless LAN (WLAN) deployments. These extensions provide fast roaming capabilities and an
almost seamless flow of multimedia traffic, whilst maintaining security as the end user roams between access points.
It should be understood that WLAN uses unlicensed spectrum, and as a result it may experience interference from other devices
using the unlicensed spectrum. The proliferation of devices in the 2.4 GHz spectrum, such as Bluetooth headsets, Microwave
ovens, cordless consumer phones, means that the 2.4 GHz spectrum may contain more congestion than other spectrums. The 5
GHz spectrum has far fewer devices operating in this spectrum and is the preferred spectrum to operate Cisco Cius in order to
take advantage of the 802.11n data rates available. Despite the optimizations that Cisco have implemented in Cisco Cius, the
use of unlicensed spectrum means that uninterrupted communication can not be guaranteed, and there may be the possibility of
voice or video gaps of up to several seconds during multimedia conversations. Adherence to the deployment guidelines will
reduce the likelihood of these voice and video gaps being present, but there is always this possibility. Through the use of
unlicensed spectrum, and the inability to guarantee the delivery of messages to a WLAN device, Cisco Cius is not intended as a
medical device and should not be used to make clinical decisions.
Requirements
Cisco Cius is an IEEE 802.11a/b/g/n collaboration tablet that provides voice, video, and data communications.
The wireless LAN must be validated to ensure it meets the requirements to deploy Cisco Cius.
The wireless LAN must be validated to ensure it meets the requirements to deploy Cisco Cius.
Site Survey
Before deploying Cisco Cius into a production environment, a site survey must be completed by a Cisco certified partner with
the advanced wireless LAN specialization. During the site survey, the RF (radio frequency) spectrum can be analyzed to
determine which channels are usable in the desired band (2.4 GHz or 5 GHz). Typically there is less interference in the 5 GHz
band as well as more non-overlapping channels, so 5 GHz is the preferred band for operation and even more highly
recommended when Cisco Cius is to be used in a mission critical environment. The site survey will include heatmaps showing
the intended coverage plan for the location. The site survey will also determine the access point platform type, antenna type,
and access point configuration (channel and transmit power) to use at the location. It is recommended to select an access point
with integrated antennas for non-rugged environments (e.g. office, healthcare, education, hospitality) and an access point
platform requiring external antennas for rugged environments (e.g. manufacturing, warehouse, retail).
See the
the advanced wireless LAN specialization. During the site survey, the RF (radio frequency) spectrum can be analyzed to
determine which channels are usable in the desired band (2.4 GHz or 5 GHz). Typically there is less interference in the 5 GHz
band as well as more non-overlapping channels, so 5 GHz is the preferred band for operation and even more highly
recommended when Cisco Cius is to be used in a mission critical environment. The site survey will include heatmaps showing
the intended coverage plan for the location. The site survey will also determine the access point platform type, antenna type,
and access point configuration (channel and transmit power) to use at the location. It is recommended to select an access point
with integrated antennas for non-rugged environments (e.g. office, healthcare, education, hospitality) and an access point
platform requiring external antennas for rugged environments (e.g. manufacturing, warehouse, retail).
See the
Designing the Wireless LAN for Voice
section for more information.
Refer to the Steps to Success website for additional information.
http://www.cisco.com/go/stepstosuccess
RF Validation
In order to determine if VoWLAN can be deployed, the environment must be evaluated to ensure the following items meet
Cisco guidelines.
Cisco guidelines.
Signal
The cell edge should be designed to -67 dBm where there is a 20-30% overlap of adjacent access points at that signal
level.
level.