A method of scheduling communications, the method comprising: wirelessly receiving, by a first node of a wireless network and from a second node of the wireless network, a first communication including a schedule information element, each of the first node and the second node comprising a full function device or a limited function device, the full function device being a mains powered device, and the limited function device being a battery operated device, the schedule information element including: a tag indicating a first operating context to which to apply schedule data, the schedule data indicating an event sampled listening reference point, SLRP, the SLRP indicating when a transmission is scheduled to occur; and a reference tag including one or more reference bits to (i) indicate whether at least a portion of the schedule data is contained in the schedule information element or has been previously received and/or (ii) identify a second operating context associated with previously received schedule data to be used as the schedule data, wherein the first and second operating context each define a respective set of parameters for one of a broadcast, multicast or a unicast service; determining, by the first node, a schedule for the first operating context based at least in part on the schedule information element, the schedule indicating that a second communication is scheduled to be sent at the event SLRP; and based at least in part on the schedule, placing, by the first node, the first node in a low power state associated with less than a threshold amount of power; and awakening, by the first node, from the low power state based on the schedule and listening by the first node for the second communication from the second node at the event SLRP. wirelessly receiving, by a first node of a wireless network and from a second node of the wireless network, a first communication including a schedule information element, each of the first node and the second node comprising a full function device or a limited function device, the full function device being a mains powered device, and the limited function device being a battery operated device, the schedule information element including: a tag indicating a first operating context to which to apply schedule data, the schedule data indicating an event sampled listening reference point, SLRP, the SLRP indicating when a transmission is scheduled to occur; and a reference tag including one or more reference bits to (i) indicate whether at least a portion of the schedule data is contained in the schedule information element or has been previously received and/or (ii) identify a second operating context associated with previously received schedule data to be used as the schedule data, wherein the first and second operating context each define a respective set of parameters for one of a broadcast, multicast or a unicast service; a tag indicating a first operating context to which to apply schedule data, the schedule data indicating an event sampled listening reference point, SLRP, the SLRP indicating when a transmission is scheduled to occur; and a reference tag including one or more reference bits to (i) indicate whether at least a portion of the schedule data is contained in the schedule information element or has been previously received and/or (ii) identify a second operating context associated with previously received schedule data to be used as the schedule data, wherein the first and second operating context each define a respective set of parameters for one of a broadcast, multicast or a unicast service; determining, by the first node, a schedule for the first operating context based at least in part on the schedule information element, the schedule indicating that a second communication is scheduled to be sent at the event SLRP; and based at least in part on the schedule, placing, by the first node, the first node in a low power state associated with less than a threshold amount of power; and awakening, by the first node, from the low power state based on the schedule and listening by the first node for the second communication from the second node at the event SLRP. placing, by the first node, the first node in a low power state associated with less than a threshold amount of power; and awakening, by the first node, from the low power state based on the schedule and listening by the first node for the second communication from the second node at the event SLRP.