WSN nodes resource constrained. In order to keep the size and the cost of the nodes down, the nodes have limited processing power, memory and radio range. However, the resource constraint which has the most significant impact on many WSNs is the constraint on energy. WSN nodes are battery operated. Many wireless sensor networks are deployed in locations where battery replacement is not feasible. A node has to be discarded when the battery depletes. Energy scavenging may alleviate this problem in some sensor networks. Most WSN protocols are very conscious of the limited supply of energy, and try to conserve energy.
We’re also approaching a highly volatile market situation, with the rise of voice search, new devices like the Amazon Echo and Google Home coming to market, and the impending rise of the personal assistants. This is a disruptive market event, and Google’s position as the number one player in search as we know it may be secure, but search as we know it may no longer be that important an activity. People are going to shift to using voice commands and a centralized personal assistant, and traditional search will be a minor feature in that world.