Self-adaptive low-delay media access control method in WBAN (wireless body area network)

The invention discloses a self-adaptive low-delay media access control method in a WBAN (wireless body area network), mainly solving the problem that a GTS (guaranteed time slot) slot can not realize self-adaptive distribution and has long time delay for ensuring time slot service when IEEE (Institute of Electrical and Electronic Engineers) 802.15.4 is applied to the WBAN. The self-adaptive low-delay media access control method comprises the following realization steps: a coordinating point receives the GTS request of a common node in a competitive period, an inactive period is compressed to expand a non-competitive period, and the GTS time slot is dynamically distributed according to amount requested by GTS; the common node of the obtained GTS time slot finishes GTS service transmission with the coordinating point in the non-competitive period; the coordinating point broadcasts and sends a notification frame in a notification frame time slot after the non-competitive period to notifythe common node to expand the time slot distribution of the non-competitive period; and the common node of the obtained GTS time slot finishes GTS service transmission with the coordinating point in the expanding non-competitive period. Compared with the IEEE 802.15.4, the self-adaptive low-delay media access control method can be used to realize the self-adaptive distribution of the GTS time slot, lower the delay of GTS service grouping, reduce the energy consumption of the coordinating point and is suitable for the WBAN.