DAMM Frequency Sharing

The frequency sharing concept

The DAMM BS422 was developed to address a lot of the challenges facing modern-day network designers and operators and with its unique ability to enable adjacent base stations to share frequencies and create RF zones, i.e. groups of synchronized coverage areas, it becomes possible to:

• Improve spectrum efficiency
• Simplify repeater systems
• Obtain base station geo-redundancy

Improved spectrum efficiency

In a setting with few users, the number of frequencies used is often disproportionate to the number of users, creating unnecessary license costs. For instance, a linear application such as a pipeline or a rail line would normally need around five or six frequency pairs to cover the line from end to end.

Using DAMM frequency sharing, the same frequency pairs can be shared on adjacent sites, creating one large radio cell. Using this setup, a frequency pair can be reused after just one other such large radio cell. This means that the same coverage can be accomplished using just two frequency pairs.

This provides a solution that addresses the problems of frequency scarcity and costs by allowing operators to configure base stations to share frequencies and designate BS422s as repeaters.

Simplified repeater systems

In an indoor or tunnel setting, the issue facing network designers is ensuring sufficient signal strength and capacity. This is typically done by using optical and off-air repeater systems and distributed antenna systems (DAS). However, this adds additional layers of network operations and management, which also translates into increased cost.

Replacing optical or RF repeaters of associated DAS infrastructure with base stations means instant benefit from a single type of hardware, with operational and maintenance spares and parts being reduced.

Additionally, using the same type of hardware, only one network management software platform needs to be deployed, simplifying the way the network is monitored and managed, and requiring less training.

Improved redundancy and RF performance

Using the DAMM frequency sharing in the BS422 has another benefit: A BS422 configured as a slave unit can automatically take over the functionality of the master unit, providing redundancy.
When it comes to sensitivity the DAMM frequency sharing functionality also outperforms the traditional repeater setup. Unlike conventional repeaters the BS422 does not degrade receiver sensitivity. In addition, the BS422 has a significantly better RF performance than any repeater, resulting in better coverage.

Simple and cost-efficient

Whether it is used outdoors along e.g. a pipeline or rail line or indoors in e.g. a tunnel, frequency sharing with the DAMM MultiTech Base Station BS422 makes it possible to build coverage in a completely new way: Simple, cost-efficient and reliable.

DAMM frequency sharing is ideal for:
• Tunnel coverage for transit/transport, instead of optical repeaters
• Coverage in a building/structure for areas such as utility/refinery, instead of off-air repeaters
• Coverage along a straight line with towers of similar height, e.g. railway/pipeline applications
• Coverage in limited geographical areas for mining/industrial complexes