The modern approach to the quality of service (QoS) claims that problems of assurance of the required 
QoS parameters may occur not only in core networks (as the classic approach assumes), but also in 
access networks (including local networks, or LANs), especially if the access network is of broadcast 
type, such as the IEEE 802.11 wireless LAN. In the case of broadcast LANs, QoS assurance in the 
network layer should be associated with the QoS assurance in the data link layer. The aim of this 
paper is to propose such an association between the 802.11 QoS assurance and the QoS assurance based 
on the Traffic Flow Description (TFD) option of the IP protocol. The TFD was specified by the Authors 
in the IETF's working document (Internet Draft), and was intended to describe Internet traffic for 
the purpose of dynamic resource reservations. The TFD-based QoS assurance offers dynamic reservations 
for micro-flows (single data real-time streams or non-real-time flows). The proposed method 
associates TFD and 802.11 QoS architectures in a way similar to the association of the DiffServ 
architecture and the 802.11 QoS, i.e. by the mapping of corresponding signalling. This mapping was 
designed and then implemented by the Authors in a Linux kernel. Results of laboratory experiments 
carried out in a test network show that the proposed mappings sufficiently promote traffic described 
by the TFD option in 802.11 WLAN and protect it against degradation. The proposed method includes 
the mapping of static signalling. Mapping of dynamic information conveyed in the TFD option is also 
possible and will be a subject of further research. The mapping between TFD and IEEE 802.11 user 
priorities and access categories will allow a 802.11 network to preserve TFD-based QoS in wireless 
links.