Cisco Cisco Cius Wi-Fi Guida Alla Progettazione
Cisco Cius Wireless Deployment Guide
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Power Save Poll (PS-POLL)
If WMM is disabled (disabling U-APSD support) or U-APSD support is not available on the access point, then Cisco Cius will
utilize PS-POLL for power management.
Below is a sample packet sequence when using PS-POLL.
utilize PS-POLL for power management.
Below is a sample packet sequence when using PS-POLL.
Delivery Traffic Indicator Message (DTIM)
Cisco Cius can use the DTIM period to schedule wake up periods to check for broadcast and multicast packets as well as any
unicast packets.
If proxy ARP is enabled, then Cisco Cius does not have to wake up at DTIM.
For optimal battery life and performance, it is recommended to set the DTIM period to 2 with a beacon period of 100 ms.
unicast packets.
If proxy ARP is enabled, then Cisco Cius does not have to wake up at DTIM.
For optimal battery life and performance, it is recommended to set the DTIM period to 2 with a beacon period of 100 ms.
The DTIM period is a tradeoff between battery life and multicast performance.
Broadcast and multicast traffic will be queued until the DTIM period when there are power save enabled clients associated to
the access point, so DTIM will determine how quickly these packets can be delivered to the client. If using multicast
applications, a shorter DTIM period can be used.
If multiple multicast streams exist on the wireless LAN frequently, then it is recommended to set the DTIM period to 1.
Broadcast and multicast traffic will be queued until the DTIM period when there are power save enabled clients associated to
the access point, so DTIM will determine how quickly these packets can be delivered to the client. If using multicast
applications, a shorter DTIM period can be used.
If multiple multicast streams exist on the wireless LAN frequently, then it is recommended to set the DTIM period to 1.
Quality of Service (QoS)
Quality of Service enables queuing to ensure high priority for voice and video traffic.
To enable proper queuing for voice, interactive video, and call control traffic use the following guidelines.
To enable proper queuing for voice, interactive video, and call control traffic use the following guidelines.
• Ensure that WMM is enabled on the access point.
• Create a QoS policy on the access point giving priority to voice, interactive video, and call control traffic.
Traffic Type
DSCP
802.1p
WMM UP
Port Range
Voice
EF (46)
5
6
UDP 16384 - 32767
Interactive Video &
Audio for Video Calls
Audio for Video Calls
AF41
(34)
(34)
4
5
UDP 16384 - 32767
Call Control
CS3 (24)
3
4
TCP 5060 - 5061
• Be sure that voice, interactive video, and call control packets have the proper QoS markings and other protocols are not
using the same QoS markings.