Research On The Dynamic Slot Assignment Algorithm Based On TDMA In Data-link

As one of the key technology of Ad Hoc Network, dozens of medium access control have been proposed the dynamic slot.allocation algorithms showed higher efficiency of slot utilization due to its on-demand nature of the timeslot. This paper makes a systematic study to the data link time slot allocation agreement and puts forward a new dynamic slot allocation protocol for TINT:PD-TDMA. The main results of this dissertation are listed as follows:1. The method of information exchanging between two nodes is studied. The nature of node exchanging information with the fixed, allocation of time slot making waste of time is analyzed, To overcome this disadvantage:, a modified FCSA algorithm is proposed, we add ACK frame on the basis of FCSA, leveraging SDM features of the wireless multiple hops network to the maximum. The simulation experiment results show that this method greats sa.ve time slot and avoid the unnecessary waste.2. The dynamic slot allocation algorithm for node are studied. Both of P-TDMA and FCSA agreement:choose their own data time slots after get the information of nodes in two-hop and look up priority table, the priority table most be completed before injecting information into node, it obviously is not suitable for the network in which nodes always join and exit network dynamically. Our solution to this problem is to send time slot allocation table after cluster counting time slot, which solves this problem well.3. The data link QoS guarantee mechanism is studied. In the node under the condition of a certain period of time produce multiple business, node priority is not equal to business priorities, under the premise to realize the QoS support is not the best priority support, especially in military networks of high priority request. Based on business priorities to achieve QoS guarantee, can very good to meet the requirements of the differentiation of military network. The experimental results show that replace the traditional node priority with business priorities, can better realize the QoS guarantee.