Abstract:
A method and apparatus for determining a best technique (algorithm and/or parameters) to use when locating a node (104) is provided herein. In particular, reference nodes (105) are provided that not only know their own locations, but also test various algorithms and parameters by estimating their locations as if they were blind nodes. The reference nodes then evaluate these various techniques against the user defined criteria for the best technique. Recommendations as to the best technique to utilize are then made to other nodes within the system.
Abstract:
An ad-hoc communication system is established where each node within the system may have multiple children nodes and parent nodes. An address scheme is proposed where each node may comprise more than one address, each address being based upon one of the parent's address. Because each node may have more than one parent, a bridge, or shortcut may exist between network branches.
Abstract:
A method and location determination module is provided for determining a location of one of a plurality of units using neighbor lists. Each unit is communicatively coupled to at least some of the other plurality of units, where at least some of the plurality of units are reference units, whose locations are known. The units communicate with other nearby units within communication range, to establish neighbor lists. A unit to be located then identifies an aggregate value corresponding to the number of occurrences of the reference units in the neighbor list of the unit to be located and the neighbor lists of each of a group of associated units. The location of the unit to be located is then determined, based upon the known locations of the reference units and the number of identified occurrences of the reference units in the corresponding neighbor lists.
Abstract:
This invention relates to Direct Sequence Code Division Mult-Access (DS-CDMA). The transmitter (104B) comprising a bit pattern decoder (304) including a first output (304A) for outputting a DS-CDMA code to a pulse shaper (206), and a second output (304B) that is coupled to a control input (312A) of amplifier (312). The bit pattern decoder functions to output a DS-CDMA code in response to a first set of bits that have a first value e.g., one, and serves to output a control signal to amplifier (312) to cause the amplifier (312) to cease output in response to a second set of bits that have a second value e.g., zero. Thus the transmitter (104B) is capable of performing DS-CDMA on/off signaling by ceasing output of the amplifier (312).