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Dynamic Resource & Power Management

As the density of small cells increase, there is a greater chance of overlapping coverage. It is thus useful to coordinate usage of airlink resource among cells to reduce interference and hence improve user SINR. When neighboring cells experience a difference in load, it is also desirable to balance their load, so as to improve overall network capacity and to match user experience across cells.

The first approach to reduce interference is Tx power management of small cells. Each small cell determines its Tx power based on the measured signal levels at its downlink receiver (Network Listen Module) and, additionally, feedback from UEs in the vicinity. This feature also reduces pilot pollution and frequent handovers.

Users near cell-edge are subject to interference by transmission from neighboring cells. This can be avoided by carefully coordinating transmissions so that airlink resource usage between neighboring cells for their respective cell-edge users is orthogonalized. This may involve exchange of messages between cells over the X2 interface.

UltraSON solution provides Tx Power management (PM) as well as Resource Management (PM) to provide improved network-wide performance, striking a balance between SINR distributions and cell splitting benefits of dense small networks.