Vocera Smartphone Installation Guide download pdf (Page 34)

Co-Channel Interference

34 ··· Vocera Infrastructure Planning Guide

To set the Scan Default Channels property:

• Use the Badge Properties Editor to enable the Scan Default Channels

property for all badges.

See Setting Advanced Properties in the Vocera Badge Configuration Guide

for more information about how to set the Scan Default Channels property.

Following is a simplified illustration of access points in a network using channels

1, 6, and 11 only :

Figure 2.5. Access points using channels 1, 6, and 11

The above illustration is a simplified representation of an access point map,

because the coverage cell of each access point is actually irregular, rather than a

constant radius, due to environmental factors. In addition, the boundary of the

coverage cell changes dynamically, as people and objects move around in the

network environment.

Co-Channel Interference

Co-channel interference occurs when access points on the same channel are

located too close to each other. When this situation occurs, multiple access

points can transmit at the same time on the same channel, corrupting each

other's packets and causing transmission delays.

In order for a network to provide continuous coverage over a large area,

access points must be placed fairly close together. Considering that only three

non-interfering channels are available for use in an 802.11b/g network, it is

quite possible that the location of some access points will cause co-channel

interference.

1 2 ... 29 30 31 32 33 34 35 36 37 38 39 ... 179 180

No comments

Vocera Smartphone Installation Guide Page 34