## 2 Self-Organization in WMN: Related Works  
Due to the increasing number of devices and services, efforts are being made so that network installation, administration, and maintenance do not become unmanageable to the administrator. Therefore, research works have addressed these issues.  
In [14], a project for a community wireless mesh self-organized network is presented. This work presents a case-study for multi hop networks, showing how limitations can be overcome and how wireless devices affect mesh performance.  
[PERSON] _et al._[15] present a multi-channel wireless mesh network architecture (called Hyacinth) that equips each mesh network node with multiple 802.11 network interface cards (NICs). The authors show that the intelligent channel assignment is critical to Hyacinth's performance, present distributed algorithms that use only local traffic load information to dynamically assign channels and to route  
Figure 1: Hybrid WMNs.  
packets, and compare their performance against a centralized algorithm that performs the same functions through a simulation study.  
In [16], a project to adopt a model for autonomic computing is presented, which shows how self-managing autonomic capabilities can be achieved in an evolutionary manner. Further, it describes initiatives for industry standards that are necessary to carry out these applications of autonomic computing within an open system architecture for heterogeneous environments.  
[PERSON] _et al._[17] have proposed a architecture system which is able to deal with the limited and often conflicting requirements to build wireless automation. This architecture is based on management separation, control and data plan. The authors also identify the different components and functions needed for communications over heterogeneous wireless networks with end to end QoS support.  
The architecture of the wireless mesh network presented in [18] called MobiMESH, has been implemented in a real life testbed designed with high mobility support and with integration capabilities. Mobility management is supported by a set of procedures that build an intermediate stratum between layer 2 and layer 3. Experimental results and performances are shown and problems and future works are outlined.  
In [19], the authors present a system denominated SCOMAN (Self-Configuring and Optimizing MANET's), which implements self-configuration and self-optimization for ad hoc networks.  
The authors propose a collaborative administration module for MANET's based on administration policies, which was implemented using the concepts of _context awareness_ and _cross layer design_. It can be noticed that the proposed approach is only applicable to ad hoc networks and will need adaptations to use in WMN.  
In [20], a wireless mesh network is considered as a candidate to solve the last mile problem in high speed network services. Traditional mesh networks face the challenge of scalability due to the features of self-organization and multi-hop connection. To this aim, this author has proposed a hierarchical architecture for large scale mesh networks. This kind of network is divided into small sub-networks which operated independently and are connected through a reliable backbone network. The proposed architecture addresses routing and security issues. Self-organization is a promising subject for the next generation of wireless networks, but approaches that support self-organization of such networks are still lacking.