## 4 Proposed Model  
The proposed system model consists of multi-sink architecture that provides communication with all IoT enabled sensor nodes [40]. Nodes are not randomly deployed but in a novel layer-by-layer hierarchy in which every node obtains a unique ID that is static unless the communication is not started. These nodes are responsible for collecting and transmitting the data to each other and send them to the sink of neighboring nodes. Sink neighboring nodes further send to sonbouoys that are present at the surface of the water. Some nodes are placed at the bottom of the ocean that are usually called anchored nodes. The purpose of adjustment of nodes in a layer-by-layer manner is basically to support the dynamic environment of water, as water is a very remote and shallow area, and it is believed that the unmanned effort is required so it is necessary to set the criteria to control these nodes random movements that continuously happened from water currents [6,7]. By assigning the IDs and its mechanism we introduce the LBA-TANVEER in which the whole mechanism is presented.  
The medium of communication between anchored and sonobuoys is the acoustic channel, as this is the practice of all ASANs. At the terrestrial environment, the sonobuoys used an audio signal to send the data to the base station further [41]. It has been assumed that packets received at any sink would be consider successfully received at all sinks by using the edge of the multi-sink model. For example, if the node '\(i\)' sends data to another  
Figure 1: Description of angle adjustment discussed in L2-ABF [7].  
node '\(j\)' with energy 'E' and vice versa, it first calculates the angle by using the tri-angular approach and sends the data accordingly, and then the consumption of energy at this event is the same at both ends.  
In our work, we made some consideration of this and it is because our focus was on the energy efficiency of the model and avoidance of empty regions [42,43]. (i) The first and foremost consideration is that to sends data for one node to another, it first calculates the angle coordinates on the base of the vector localization service [26,40,41,42,43,44]. (ii) All ordinary nodes send the data packet to sonobuoys simultaneously, and the sink node can receive multiple packets at the same time without any loss of data and collision. (iii) The vertical movements of nodes are negligible; by the way, the horizontal movement of nodes is considered with water current [45,46]. (iv) All the nodes have unique IDs assigned by LBA and will not change in the rest of the network lifetime. (v) The BINs are deployed near sink neighboring nodes so that loss of data inside the empty regions are recovered. (vi) The finding of empty regions is usually near to sink neighboring nodes so that the BIN is also deployed near the sink zone. Figure 2 presents the proposed model in which anchored nodes deployed at bottom that initiates the communication through relay nodes with a mixture of founding empty nodes by using tri-angular calculation. The layer adjustments start from bottom to top so that the communication starts from the first sent by anchored (bottom) and received at the end by sink nodes (top).