Abstract: This disclosure relates to the integrity of a civil structure, and in particular the assessment of the integrity of one or more joints of a civil structure. Two or more sensors (200a) and (200b) are provided on different substructures (102) and (106) that form the structural joint (112), wherein each sensor (200a) and (200b) generates sensor data associated with the substructure that that sensor is provided on. A measure of similarity is determined between the sensor data. The integrity measure of the structural joint is based on the measure of similarity. The method exploits the finding that when a joint is stressed and healthy (and inturn has good structural integrity), sensed movement of each substructure that forms the joint is substantially similar, such as in frequency or amplitude. Other aspects of the invention include software and a computer implemented method.

Abstract: A method (S200) and system for scheduling data transmissions between a base station (110) and a plurality of user terminals (130) in a wireless network. The method and system include transmitting a first poll (260) from the base station (110) to a first user terminal traffic stream (Step S210). In response to the first poll (260) the first user terminal traffic stream transmits a first frame (210) to the base station (110), where a queue state of the first user terminal traffic stream is indicated in the header of the first frame (210) (Step S220). The base station (110) removes the first user terminal traffic stream from an active list when the first frame (210) indicates that the queue state is empty (Step S230). The base station (110) then calculates a deferral window (220) and schedules transmissions of other data frames (240) between the base station (110) and the plurality of user terminal traffic streams that remain on the active list (Steps S240 and S250).

Abstract: A method (600) performed by a packet scheduler of an access point (215) of adaptively resizing a scheduling window in a Quality of Service enabled Local Area Network (200) is disclosed. The packet scheduler schedules data packets for a given duration, termed a scheduling window. The packet scheduler according to an embodiment of the invention adaptively changes the duration of the scheduling window based on the QoS requirements of data packets to be transmitted to and from the access point (215). In particular, the duration of the scheduling window is changed based on the delay requirement of the data packet having the most constraint QoS requirement.

Abstract: A method and system for scheduling multicast transmissions in a WLAN involves transmissions between a Quality of Service (QoS) Access Point (QAP) (105) and a plurality of stations (110). The method includes transmitting a first group poll (410) from a QAP (105) to each station (110) in a multicast group comprising a plurality of stations (110) (step 705). An active station (110) and inactive stations (110) among said plurality of stations (110) are then identified (step 510). Next, a directed Contention Free (CF) poll (425) is transmitted from the QAP (105) to the active station (110) (step 715). An inbound QoS data frame (415) is then transmitted from the active station (110) to the QAP (105) (step 720). An outbound QoS data frame (420) corresponding to the inbound QoS data frame (415) is then multicast from the QAP (105) to the inactive stations (110) (step 725).

Abstract: A method (S200) and system for scheduling data transmissions between a base station (110) and a plurality of user terminals (130) in a wireless network. The method and system include transmitting a first poll (260) from the base station (110) to a first user terminal traffic stream (Step S210). In response to the first poll (260) the first user terminal traffic stream transmits a first frame (210) to the base station (110), where a queue state of the first user terminal traffic stream is indicated in the header of the first frame (210) (Step S220). The base station (110) removes the first user terminal traffic stream from an active list when the first frame (210) indicates that the queue state is empty (Step S230). The base station (110) then calculates a deferral window (220) and schedules transmissions of other data frames (240) between the base station (110) and the plurality of user terminal traffic streams that remain on the active list (Steps S240 and S250).

Abstract: A method (600) performed by a packet scheduler of an access point (215) of adaptively resizing a scheduling window in a Quality of Service enabled Local Area Network (200) is disclosed. The packet scheduler schedules data packets for a given duration, termed a scheduling window. The packet scheduler according to an embodiment of the invention adaptively changes the duration of the scheduling window based on the QoS requirements of data packets to be transmitted to and from the access point (215). In particular, the duration of the scheduling window is changed based on the delay requirement of the data packet having the most constraint QoS requirement.