Repacking is an efficient scheme for bandwidth packing problem (BPP) in centralized networks (CNs), where a central unit allocates bandwidth to the rounding terminals. In this paper, we study its performance by proposing a new formulation of the BPP in the CN, and introducing repacking scheme into next fit algorithm in terms of the online constraint. For the realistic applications, the effect of call demand distribution is also exploited by means of simulation. The results show that the repacking efficiency is significant (e.g. the minimal improvement about 13% over uniform distribution), especially in the scenarios where the small call demands dominate the network.

Energy-saving is crucial in wireless sensor networks. In this letter, we address the issue of lossless packing aggregation with the aim of reducing energy lost in cluster-model wireless sensor networks. We propose a performance model based on the bin packing problem to study the packing efficiency. It is evaluated in terms of control header size, and validated by simulations.