摘要:
In accordance with an example embodiment, method of wireless communication includes sending a beacon frame (300), which includes at least one availability information element (AIE) (400, 404). The method also includes scheduling transmission and reception of traffic among a plurality of devices (101, 103), or systems (101, 103), or both based on the AIES from the receivers. A wireless network (100) is also disclosed.
摘要:
A system (400), device (500) (401), and method are provided for power saving in a wireless communication network (400), where all devices (401i) regularly transmit a beacon (600) but can enter a hibernation mode in which they do not transmit beacons (600) and operate in a power-saving state. A device (400) announces the start (303) and duration (304) of the hibernation period in its beacon (600) prior to its hibernation period. The neighboring devices (401i) keep information on the presence of the beacon (600) of the hibernating device (401) in their own beacons (600) in order to block the beacon slot (204) for the hibernating device (401) during its sleep time. Devices (401i) furthermore include an information element (604) in their beacons (600) that contains all receiver addresses for which a device (401i) has data pending to be sent.
摘要:
A system (400), device (401), and method are provided for decentralized medium access control comprising periodic beacon (600) transmissions of all active devices in beacon slots (204) (302) (303), grouping such beacon slots (204) (302) (303) in at least one contiguous dynamic beacon period (301), and expanding or shrinking this at least one contiguous dynamic beacon period (301) depending on the number of occupied beacon slots (204) (302) (303). The dynamic beacon period (301) adapts to devices (401) joining and leaving the network (400) as well as to collisions of beacon frames(600) on the medium (410).
摘要:
The invention relates to an ad hoc network comprising a plurality of terminals for determining terminals as controllers for controlling at least two sub-networks. An identification is assigned to each terminal. A terminal transmits its identification to the other terminals which are located in a predefined area. The terminal having the largest identification is provided to be the controller of a first sub-network. A certain number of further terminals having the lowest identifications are assigned to the first sub-network. The non-integrated terminal having the highest-but-one identification is provided to be the controller of a second sub-network. A certain number of further non-integrated terminals having the lowest identifications are assigned to the second sub-network.
摘要:
A method of operating a network node of a network, a network node, a network system, a computer-readable medium, and a program element A method (300) of operating a network node (101 - 104) of a network system (100), comprising the steps of generating (305) a signal to be transmitted, selecting (310) one of a plurality of communication channels (105 - 108) of the network system (100) for transmitting the signal, and, in case that the selected channel (105 - 108) is not ready for transmitting the signal, selecting (345) another one of the plurality of communication channels (105 - 108) for transmitting the signal.
摘要:
In a distributed Mac protocol having a slotted superframe (102) comprising at least one slotted beacon period (104) followed by a data transfer period (103), a system and method is provided for creating and maintaining several beacon periods (104) at different positions in the superframe (102). When joining the network (300) a device (301) either joins an existing beacon period (104) or creates a new beacon period (104) at a position in the superframe (102) that does not overlap with existing beacon periods (104) or reservation periods. Beacon periods (104) mutually protect each other by devices (301) announcing the neighboring beacon periods in their beacons.
摘要:
A system and method is provided for incorporating host-device communication in wireless IJSB (WUSB). A host (101) either uses a multicast Distributed Reservation Protocol (DRP) frame on behalf of connected devices (102) to reserve wireless channel resources, a unicast DRP frame or Enhanced Distributed Channel Access (EDCA) with a Poll Frame. In the case of a unicast DRP frame the number of unicast frames sent for reservation depends on the number of connected devices (102).
摘要:
A system (300), apparatus (301), and method are provided for decentralized medium access control comprising an enhanced protocol for UWB MAC that includes a distributed reservation protocol (DRP) for distributed reservation of the medium (310). The invention also relates to any wireless system (300) that uses a MAC protocol comprising a distributed reservation protocol. The method comprises devices (301) announcing medium reservations in beacons (400) and devices (301) that receive such announcements respecting the reservations.
摘要:
The invention relates to a network with several sub-networks (1,2,3) which each comprise a controller for controlling the sub-network and which can each be connected via bridge terminals (4,5). To make the data passage through a bridge terminal as efficient as possible, the traffic passed by this terminal is either prioritized by the relevant controllers, or a fixed capacity is reserved for the transmitted data in the relevant sub-networks.
摘要:
The invention relates to a network comprising a plurality of sub-networks, which sub-networks can each be connected via bridge terminals and comprise each a controller for controlling one sub-network. A controller is provided for setting up a connection between two sub-networks via a possible bridge terminal. The order of the connection set-up is determined first by the minimum number of possible bridge terminals between two sub-networks and then by the connection quality.