User's Manual Part 1

System Overview of Subscriber Module MeshMAX 5054 Series User Guide

Dynamic Data Rate Selection (DDRS)

• Channel Bandwidth and Turbo mode (when available) must be the same for the BSU and SU in order to register

the SU.

• Roaming will automatically select a channel on the SU corresponding to the BSU channel. Roaming is the

procedure in which an SU terminates the session with the current BSU and starts the registration procedure with

another BSU when it finds the quality of the other BSU to be better.

Dynamic Data Rate Selection (DDRS)

NOTE: DDRS is configured on the BSU. See the Tsunami MP.11-R Installation and Management Guide for more

information.

The WORP Dynamic Data Rate Selection (DDRS) lets the BSU and SUs monitor the remote average signal-to-noise

ratio (SNR) and the number of retransmissions between the BSU and SUs and adjust the transmission data rate to an

optimal value to provide the best possible throughput according to the current communication conditions and link quality.

With DDRS enabled, a BSU can maintain different transmission data rates to different SUs, optimizing the data rate

based on the link quality of each SU independently.

Both the BSU and the SUs monitor the remote SNR and number of retransmissions. The BSU monitors these values for

each SU that is registered. An SU monitors these values for the BSU. When necessary, based on this information, the

data rate is dynamically adjusted.

Note that DDRS is enabled or disabled on the BSU only. This operation requires the BSU to be rebooted. After rebooting,

the BSU sends a multicast announcement to all SUs to begin the registration process. During registration, an SU is

informed by the BSU whether DDRS is enabled or disabled and it sets its DDRS status accordingly.

Virtual Local Area Networks (VLANs)

NOTE: VLANs are configured on the Base Station Unit. See the Tsunami MP.11-R Installation and Management Guide

for more information.

Virtual Local Area Networks (VLANs) are logical groupings of network hosts. Defined by software settings, other VLAN

members or resources appear (to connected hosts) to be on the same physical segment, no matter where they are

attached on the logical LAN or WAN segment. They simplify allowing traffic to flow between hosts and their

frequently-used or restricted resources according to the VLAN configuration.

Subscriber units are fully VLAN-ready; however, by default, VLAN support is disabled. Before enabling VLAN support,

certain network settings should be configured and network resources such as VLAN-aware switches should be available,

dependent upon the type of configuration.

VLANs are used to conveniently, efficiently, and easily manage your network in the following ways:

• Manage VLAN configuration from a single window

• Define groups

• Reduce broadcast and multicast traffic to unnecessary destinations

• Improve network performance and reduce latency

• Increase security

• Secure network restricts members to resources on their own VLAN

VLAN tagged data is collected and distributed through a unit’s Ethernet interface. The units can communicate across a

VLAN-capable switch that analyzes VLAN-tagged packet headers and directs traffic to the appropriate ports when the

units are working in their Transparent mode.

VLAN features can be managed via:

• The BSU’s Web interface

• The Command Line Interface