Guest Editorial - Wireless Network and Communication Signal Processing

The topics of this special issue are mainly devoted to the most recent research, development and applications in the field of wireless ad-hoc networks, multimedia networks, communication signal processing. Among all the submitted manuscripts, 15 papers were selected and included in this special. Creative thoughts and interesting inspirations will be presented, discussed and disseminated in this issue. There are five papers concerned with wireless ad-hoc networks. Y. Mao et al. proposed an effective data gathering scheme for heterogeneous energy wireless sensor networks; J. J. Gui et al. gave a mathematic approach to model the vulnerabilities from the Sybil attack for ad-hoc routing protocol. X. Yan et al. designed a new STAR MAC protocol to reduce the energy consumption in the traditional sensor network. H. Chen et al. proposed a novel trust routing scheme based on node behavior evaluation to enhance the security of the ad-hoc network. S. Shuo et al. in their paper proposed a weighted trilateral position algorithm to improve the position accuracy, and meanwhile, indoor field tests were also designed and carried out to verify their newly proposed algorithm. As to multimedia networks, three papers were selected in this issue. F. Wang et al. studied the problem of reliable multi-path routing with bandwidth and delay constraints. The authors first proposed a heuristic algorithm as the benchmark, and then presented a polynomial time approximation to obtain a (1  )-approximation solution. P. Zeng et al. proposed two different