Abstract: A communication system and method for joining a first cell in a network is disclosed. The system includes a plurality of nodes with one node configured as a base station and one or more nodes of the plurality of nodes configured as user equipment. Aliased resource allocation messages are used to send scheduling information to the user equipment, for which proper aliases must be determined. To ensure that proper aliasing is utilized, the base station and user equipment determine that the alias is unique. The base station may also recommend an alias with a smaller bit size. The communication system may also include a second cell that shares user equipment with the first cell, with each shared user equipment having a cell-specific alias.

Abstract: A communications node of a mobile ad hoc network (MANET) or like multi-node network may receive a preamble and/or header portion associated with a resource allocation message (e.g., as opposed to the full message) transmitted by another network node in motion relative to the receiving node. The receiving node determines a receiver-side Doppler nulling direction (e.g., for offsetting Doppler shift associated with the motion of the transmitting node relative to the receiving node) by adjusting a receiving frequency of the preamble and/or header portion through one or more nulling frequencies, each nulling frequency associated with a nulling direction for offsetting Doppler shift due to relative motion in that direction. Based on the determination of a receiver-side Doppler nulling frequency, the receiving node can determine a velocity and direction of the relative motion between the receiving and transmitting nodes.

Abstract: Directional transmission in a mobile ad-hoc network includes receiving position data for peer nodes in the network. When transmitting a data packet to a peer node, the position of the peer node is determined with reference to a position database. An electronically steerable antenna is focused to transmit to the position and the packet is transmitted. The electronically steerable antenna is then placed in an omnidirectional mode to receive packet transmissions.

Abstract: A method determines an efficient route between a source node and a destination node in a mobile ad-hoc network. The source node and the destination node communicate over a control channel until a link event occurs, such as congestion or a link failure in the control channel. In response to the link event, the method begins probing the network for at least one alternative route between the source node and the destination node. The probing of the network, however, is limited based on a route metric, which includes information regarding the number of network nodes between the source node and the destination node and information regarding a required bandwidth necessary for the efficient route.

Abstract: A radio is disclosed. The radio system includes radio system nodes that are configured with a transceiver to transmit and receive information over more than one frequency. Each radio system node also includes a processor, the processor being any of a variety of processing elements, including but not limited to general purpose processors, coders, decoders, and the like. The processor is configured to gather a block of information and configured to format the block of information into a plurality of sub blocks. Each sub block of information includes message synchronization information. The sub blocks are dispersed in time and over the more than one frequency and substantially simultaneous transmission and reception of multiple transmissions in the same frequency band is enabled.

Abstract: A radio is disclosed. The radio system includes radio system nodes that are configured with a transceiver to transmit and receive information over more than one frequency. Each radio system node also includes a processor, the processor being any of a variety of processing elements, including but not limited to general purpose processors, coders, decoders, and the like. The processor is configured to gather a block of information and configured to format the block of information into a plurality of sub blocks. Each sub block of information includes message synchronization information. The sub blocks are dispersed in time and over the more than one frequency and substantially simultaneous transmission and reception of multiple transmissions in the same frequency band is enabled.