Due to MAC collisions and mobility, quality of service (QoS) provisioning in mobile ad hoc networks is very challenging. In this paper, we propose an innovative scheme to grant high priority to communications between some important nodes in TDMA based ad hoc networks. In addition to bandwidth reservation in previous QoS routing approaches, our scheme adopts a new approach: bandwidth pre-reservation. Some bandwidth is pre-reserved at intermediate nodes in a quadrangle-shaped area formed between important nodes. The key idea is to utilize each node's geographic location information and minimize potential scheduling conflicts for transmissions. In this way, time slot collisions in adjacent wireless links along a path can be reduced so that more high priority connections can be accepted into the network. Extensive simulations show that our scheme can successfully provide better communication quality at a relatively low price.
|Number of pages||5|
|Journal||IEEE International Conference on Communications|
|State||Published - 30 Aug 2004|
|Event||2004 IEEE International Conference on Communications - Paris, France|
Duration: 20 Jun 2004 → 24 Jun 2004