Complex sentence: Dynamic Spectrum Management (DSM) is a set of techniques being researched and developed to improve performance of a communication network as a whole instead of optimize one link in the network on the account of losing performance on many lines affected by this single optimization.
Split into simpler sentences: Dynamic Spectrum Management (DSM) is a set of techniques being researched and developed to improve performance of a communication network as a whole. This can be compared to optimization of one link in the network on the account of losing performance on many links negatively affected by this single optimization.