摘要:
A method and apparatus for operation of a node within a mobile ad hoc cognitive radio network is provided. The method includes sensing at least one assigned communications channel. Sensing at least one assigned communications channel includes measuring a value of at least one parameter corresponding to the communications channel. The method further includes comparing the measured value of the at least one parameter with a set of stored values of the at least one parameter to determine a change in the measured values. Finally a sleep mode of the node is activated for a time period, wherein the time period is determined using the change in the measured values.
摘要:
A method and apparatus for operation of a node within a mobile ad hoc cognitive radio network is provided. The method includes sensing at least one assigned communications channel. Sensing at least one assigned communications channel includes measuring a value of at least one parameter corresponding to the communications channel. The method further includes comparing the measured value of the at least one parameter with a set of stored values of the at least one parameter to determine a change in the measured values. Finally a sleep mode of the node is activated for a time period, wherein the time period is determined using the change in the measured values.
摘要:
A method of operation of a node for multi-band communication routing within a wireless communication system comprises communicating a communication session on a default route within an identified quality of service objective on a first frequency band; broadcasting, on a second frequency band, one or more route discovery messages at each of a plurality of sets of transmission variables; storing one or more alternate route table entries in a route table, wherein each of the one or more alternate route table entries are indexed by each of the plurality of sets of transmission variables that are at least within the quality of service objective; selecting a stored alternate route that is at least within the quality of service objective of the communication session on the second frequency band; and switching the communication session to operate using the transmission variables related to the selected alternate route.
摘要:
A method in a wireless communication device (200) capable of functioning as a node in an ad hoc network, including switching packet data, received from a source node, to a destination node, determining a switching capacity utilization of the wireless communication device, and re-allocating at least a portion of the packet switching performed by the wireless communication device with another switching node based upon the switching capacity utilization of the wireless communication device.
摘要:
A method of operation of a node for multi-band communication routing within a wireless communication system comprises communicating a communication session on a default route within an identified quality of service objective on a first frequency band; broadcasting, on a second frequency band, one or more route discovery messages at each of a plurality of sets of transmission variables; storing one or more alternate route table entries in a route table, wherein each of the one or more alternate route table entries are indexed by each of the plurality of sets of transmission variables that are at least within the quality of service objective; selecting a stored alternate route that is at least within the quality of service objective of the communication session on the second frequency band; and switching the communication session to operate using the transmission variables related to the selected alternate route.
摘要:
Some embodiments are directed to a method and apparatus for performing resource negotiation in a station implementing a direct communication link with at least one other station on an Orthogonal Frequency-Division Multiple Access (OFDMA) data channel. The station scans sub-channels on the data channel for base headers included in predefined position in transmissions sent on the sub-channel. The station then decodes a base header in at least one selected sub-channel to obtain parameters of a channel reservation. The obtained parameters are stored in a channel utilization table. The station selects a resource on the data channel in at least one of time or frequency that the station has observed to be free using information from the channel utilization table. The station then begins a resource negotiation process about the selected resource.
摘要:
Disclosed are methods that associate “importance” information with chunks of a media presentation. An end-user device uses this information to intelligently manage resources when downloading or rendering the media presentation. An editor tags a chunk as important based on the contents of the chunk. The importance information includes a recommendation that this chunk be rendered at a higher-than-usual resolution and that the end-user device start downloading this chunk out of order. An advertiser recommends that an advertisement be rendered at a resolution high enough for the end user to view it appropriately. The importance information can include a recommended point at which to display the advertisement (e.g., between scenes in the media presentation). The end-user device can download advertisements before they are needed. Later, when the user requests a media presentation, an already downloaded advertisement is rendered while the initial chunks of the media presentation are downloaded.
摘要:
A method for providing secure communications among a plurality of ad hoc devices includes authenticating one or more first devices within a first network; authenticating one or more second devices within a second network; transmitting a group key to the authenticated first devices and to the authenticated second devices; establishing an ad hoc network by at least one of the authenticated first devices and at least one of the authenticated second devices using the group key; and communicating within the ad hoc network among the at least one of the authenticated first devices and the at least one of the authenticated second devices.
摘要:
A method and apparatus for quieting multiple channels on unlicensed spectrum is provided herein. During operation, a cluster head (or centralized controller such as a base station) will listen to determine if channels exist without primary system traffic. A message will then be sent out by the cluster head quieting the channels. All secondary nodes in the cluster will transmit a CTS-to-self if they do not hear any traffic by any primary system node (which may be nodes out of range of the cluster head) on the channels, otherwise they send a NAK on channels not being used by the hidden nodes. If a NAK is received by the cluster head, the process repeats until no NAK has been received. After the primary system is quieted, a poll message is sent by the cluster head to nodes instructing them to send a CTS-to-Self message so that the spectrum is quieted for the period indicated in the message.
摘要:
A method for enabling mobile coverage extension and peer-to-peer communications in an ad hoc network is provided. The method includes communicating at least one message among the plurality of nodes, wherein the at least one message comprises: an ad hoc zone, wherein the ad hoc zone comprises at least one channel selected from a group of channels comprising: at least one synchronization channel for synchronizing out of coverage nodes, at least one access channel for peer-to-peer communications, and at least one ad hoc relay data/traffic channel for exchanging data during data sessions between one or more nodes.