The present invention provides an access point device, a communication unit and a method for access to a communication media in a communication network. The access point comprises a communication interface for exchanging data with a plurality of communication units in the communication network via the communication media; and a processor for receiving a media access request message in a contention mode from at least one communication unit of the plurality of communication units via the communication interface; and polling the at least one communication unit by assigning a media access duration to each of the at least one communication unit according to a corresponding duration information for media access in the received media access request message.