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The MOB_SLP-REQ (SLeeP Request Message) (sent by a Sleep mode supporting MS) and the MOB_SLP-RSP (SLeeP Response Message) (sent by the BS) allow a request to be made for a definition and/or activation of certain Sleep mode power-save classes.
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There are three types of power saving class, which differ by their parameter sets, procedures of activation/deactivation and policies of MS availability for data transmission. The power saving class is a group of connections that have common demand properties. Implementation of the Sleep mode is optional for the MS and mandatory for the BS.įor each MS in the Sleep mode, its BS keeps one or several contexts, each one related to a certain Sleep mode power saving class. In addition, the MS can scan other base stations to collect information to assist handover during the Sleep mode. Minimise the usage of the serving base station air interface resources. The Sleep mode objectives are the following : The MS is unavailable to the serving BS (downlink and uplink) in these periods. In the Sleep mode state, the MS conducts pre-negotiated periods of absence from the serving BS air interface. IEEE 802.16e defines two new modes: the Sleep mode and the Idle mode in order to have:Ĭonsequently, the normal operation mode that exists in 802.16-2004 is known as the Active mode.