Patent Publication Number: US-7725080-B2

Title: Mote networks having directional antennas

Description:
CROSS-REFERENCE TO RELATED APPLICATIONS 
   The present application is related to and claims the benefit of earliest available effective filing date(s) from the following listed application(s) (the “Related Applications”) (e.g., claims earliest available priority dates for other than provisional patent applications; claims benefits under 35 USC §119(e) for provisional patent applications), and incorporates by reference in its entirety all subject matter of the following listed application(s); the present application also claims the earliest available effective filing date(s) from, and also incorporates by reference in its entirety all subject matter of any and all parent, grandparent, great-grandparent, etc. applications of the Related Application(s) to the extent such subject matter is not inconsistent herewith:
     1. For purposes of the USPTO extra-statutory requirements, the present application constitutes a continuation-in-part of U.S. patent application Ser. No. 10/816,375, entitled MOTE-ASSOCIATED INDEX CREATION, naming Edward K. Y. Jung and Clarence T. Tegreene as inventors, filed 31 Mar. 2004, which is currently co-pending, or is an application of which a currently co-pending application is entitled to the benefit of the filing date.   2. For purposes of the USPTO extra-statutory requirements, the present application constitutes a continuation-in-part of U.S. patent application Ser. No. 10/816,082, entitled TRANSMISSION OF MOTE-ASSOCIATED INDEX DATA, naming Edward K. Y. Jung and Clarence T. Tegreene as inventors, filed 31 Mar. 2004, which is currently co-pending, or is an application of which a currently co-pending application is entitled to the benefit of the filing date.   3. For purposes of the USPTO extra-statutory requirements, the present application constitutes a continuation-in-part of U.S. patent application Ser. No. 10/816,358, entitled AGGREGATING MOTE-ASSOCIATED INDEX DATA, naming Edward K. Y. Jung and Clarence T. Tegreene as inventors, filed 31 Mar. 2004, which is currently co-pending, or is an application of which a currently co-pending application is entitled to the benefit of the filing date   4. For purposes of the USPTO extra-statutory requirements, the present application constitutes a continuation-in-part of U.S. patent application Ser. No. 10/816,102, entitled TRANSMISSION OF AGGREGATED MOTE-ASSOCIATED INDEX DATA, naming Edward K. Y. Jung and Clarence T. Tegreene as inventors, filed 31 Mar. 2004, which is currently co-pending, or is an application of which a currently co-pending application is entitled to the benefit of the filing date.   5. For purposes of the USPTO extra-statutory requirements, the present application constitutes a continuation-in-part of U.S. patent application Ser. No. 10/816,364, entitled FEDERATING MOTE-ASSOCIATED INDEX DATA, naming Edward K. Y. Jung and Clarence T. Tegreene as inventors, filed 31 Mar. 2004, which is currently co-pending, or is an application of which a currently co-pending application is entitled to the benefit of the filing date.   6. For purposes of the USPTO extra-statutory requirements, the present application constitutes a continuation-in-part of U.S. patent application Ser. No. 10/814,454, entitled MOTE NETWORKS USING DIRECTIONAL ANTENNA TECHNIQUES, naming Clarence T. Tegreene as inventor, filed 31 Mar. 2004, now U.S. Pat. No. 7,317,898, or is an application of which a currently co-pending application is entitled to the benefit of the filing date.   7. For purposes of the USPTO extra-statutory requirements, the present application constitutes a continuation-in-part of U.S. patent application Ser. No. 10/813,967, entitled MOTE NETWORKS HAVING DIRECTIONAL ANTENNAS, naming Clarence T. Tegreene as the inventor, filed 31 Mar. 2004, now U.S. Pat. No. 7,366,544,or is an application of which a currently application is entitled to the benefit of the filing date.   8. For purposes of the USPTO extra-statutory requirements, the present application constitutes a continuation-in-part of U.S. patent application Ser. No. 11/728,719, entitled MOTE NETWORKS USING DIRECTIONAL ANTENNAS, naming Clarence T. Tegreene as the inventor, filed 26 Mar. 2007, now U.S. Pat. No. 7,418,238,or is an application of which a currently application is entitled to the benefit of the filing date.   9. For purposes of the USPTO extra-statutory requirements, the present application constitutes a continuation-in-part of U.S. patent application Ser. No. 11/731,734, entitled MOTE NETWORKS USING DIRECTIONAL ANTENNAS, naming Clarence T. Tegreene as the inventor, filed 30 Mar. 2007,or is an application of which a currently co-pending application is entitled to the benefit of the filing date.   10. For purposes of the USPTO extra-statutory requirements, the present application constitutes a continuation-in-part of U.S. patent application Ser. No. 11/986,993, entitled MOTE NETWORKS HAVING DIRECTIONAL ANTENNAS, naming Clarence T. Tegreene as the inventor, filed 26 Nov. 2007, which is currently co-pending, or is an application of which a currently co-pending application is entitled to the benefit of the filing date.   11. For purposes of the USPTO extra-statutory requirements, the present application constitutes a continuation-in-part of U.S. patent application Ser. No. 11/998,879, entitled MOTE NETWORKS HAVING DIRECTIONAL ANTENNAS, naming Clarence T. Tegreene as the inventor, filed 29 Nov. 2007, now U.S. Pat. No. 7,580,730,or is an application of which a currently application is entitled to the benefit of the filing date.   

   TECHNICAL FIELD 
   The present application is related, in general, to mote systems and/or mote methods. 
   SUMMARY 
   In one aspect, a mote system includes but is not limited to: at least one of an antenna signal generation unit or an antenna signal detection unit; and a directional antenna system operably coupled with said at least one of an antenna signal generation unit or an antenna signal detection unit. In addition to the foregoing, other system aspects are described in the claims, drawings, and/or text forming a part of the present application. 
   In one aspect a mote method of using includes but is not limited to: distributing one or more motes, each mote having (i) at least one of an antenna signal generation unit or an antenna signal detection unit, and (ii) a directional antenna system operably couplable with said at least one of an antenna signal generation unit or an antenna signal detection unit. In addition to the foregoing, other method aspects are described in the claims, drawings, and/or text forming a part of the present application. 
   In one aspect a mote method of making includes but is not limited to: forming a mote body; and emplacing a directional antenna proximate to the mote body. In addition to the foregoing, other method aspects are described in the claims, drawings, and/or text forming a part of the present application. 
   In one aspect a mote method of making includes but is not limited to: emplacing a directional antenna proximate to a mote body; and integrating the mote body with at least one of an animate or inanimate unit. In addition to the foregoing, other method aspects are described in the claims, drawings, and/or text forming a part of the present application. 
   In one or more various aspects, related systems include but are not limited to circuitry and/or programming for effecting the herein-referenced method aspects; the circuitry and/or programming can be virtually any combination of hardware, software, and/or firmware configured to effect the herein-referenced method aspects depending upon the design choices of the system designer. 
   In addition to the foregoing, various other method and/or system aspects are set forth and described in the text (e.g., claims and/or detailed description) and/or drawings of the present application. 
   The foregoing is a summary and thus contains, by necessity, simplifications, generalizations and omissions of detail; consequently, those skilled in the art will appreciate that the summary is illustrative only and is NOT intended to be in any way limiting. Other aspects, inventive features, and advantages of the devices and/or processes described herein, as defined by the claims, will become apparent in the detailed description set forth herein. 

   
     BRIEF DESCRIPTION OF THE FIGURES 
       FIG. 1  shows an example of mote  100  of mote-appropriate network  150  that may serve as a context for introducing one or more processes and/or devices described herein. 
       FIG. 2  depicts partial exploded views of motes  200 ,  250 , and  270  that form a part of a mote network. 
       FIG. 3  depicts a high-level logic flowchart of a process. 
       FIG. 4  illustrates a high-level logic flowchart depicting an alternate embodiment of the high-level logic flowchart of  FIG. 3 . 
       FIG. 5  illustrates a high-level logic flowchart depicting several alternate embodiments of the high-level logic flowchart of  FIG. 4 . 
       FIG. 6  illustrates a high-level logic flowchart depicting several alternate embodiments of the high-level logic flowchart of  FIG. 3 . 
       FIG. 7  illustrates a high-level logic flowchart depicting an alternate embodiment of the high-level logic flowchart of  FIG. 3 . 
       FIG. 8  illustrates a high-level logic flowchart depicting an alternate embodiment of the high-level logic flowchart of  FIG. 3 . 
       FIG. 9  illustrates a high-level logic flowchart depicting an alternate embodiment of the high-level logic flowchart of  FIG. 8 . 
       FIG. 10  illustrates a high-level logic flowchart depicting an alternate embodiment of the high-level logic flowchart of  FIG. 3 . 
       FIG. 11  depicts a high level logic flowchart of a process. 
       FIG. 12  illustrates a high-level logic flowchart depicting several alternate embodiments of the high-level logic flowchart of  FIG. 11 . 
       FIG. 13  illustrates a high-level logic flowchart depicting an alternate embodiment of the high-level logic flowchart of  FIG. 11 . 
       FIG. 14  illustrates a high-level logic flowchart depicting an alternate embodiment of the high-level logic flowchart of  FIG. 11 . 
       FIG. 15  illustrates a high-level logic flowchart depicting an alternate embodiment of the high-level logic flowchart of  FIG. 11 . 
       FIG. 16  depicts a high level logic flowchart of a process. 
       FIG. 17  illustrates a high-level logic flowchart depicting an alternate embodiment of the high-level logic flowchart of  FIG. 16 . 
       FIG. 18  illustrates a high-level logic flowchart depicting an alternate embodiment of the high-level logic flowchart of  FIG. 17 . 
   

   The use of the same symbols in different drawings typically indicates similar or identical items. 
   DETAILED DESCRIPTION 
   The present application uses formal outline headings for clarity of presentation. However, it is to be understood that the outline headings are for presentation purposes, and that different types of subject matter may be discussed throughout the application (e.g., device(s)/structure(s) may be described under process(es)/operations heading(s) and/or process(es)/operations may be discussed under structure(s)/process(es) headings; and/or descriptions of single topics may span two or more topic headings). Hence, the use of the formal outline headings is not intended to be in any way limiting. 
   I. Device(s) and/or System(s) 
   With reference now to  FIG. 1 , shown is an example of mote  100  of mote-appropriate network  150  that may serve as a context for introducing one or more processes and/or devices described herein. A mote is typically composed of sensors, actuators, computational entities, and/or communications entities formulated, in most cases at least in part, from a substrate. As used herein, the term “mote” typically means a semi-autonomous computing, communication, and/or sensing device as described in the mote literature (e.g., Intel Corporation&#39;s mote literature), as well as equivalents recognized by those having skill in the art. Mote  100  depicts a specific example of a more general mote. Mote  100  is illustrated as having antenna  102 , physical layer  104 , antenna entity  119 , network layer  108  (shown for sake of example as a mote-appropriate ad hoc routing application), light device entity  110 , electrical/magnetic device entity  112 , pressure device entity  114 , temperature device entity  116 , volume device entity  118 , and inertial device entity  120 . Light device entity  110 , electrical/magnetic device entity  112 , pressure device entity  114 , temperature device entity  116 , volume device entity  118 , antenna entity  119 , and inertial device entity  120  are depicted to respectively couple through physical layers  104  with light device  140 , electrical/magnetic device  142 , pressure device  144 , temperature device  156 , volume device  158 , antenna  102 , and inertial device  160 . Those skilled in the art will appreciate that the herein described entities and/or devices are illustrative, and that other entities and/or devices consistent with the teachings herein may be substituted and/or added. 
   Those skilled in the art will appreciate that in some implementations motes may contain their own power sources, while in other implementations power may be supplied to motes by an outside source (e.g., through electromagnetic induction from a parasitic network or optical to electrical conversion). Those skilled in the art will further appreciate that there are various ways in which motes may be distributed to form a mote network. For example, in some implementations the motes are randomly dispersed, while in other implementations the motes are either directly or indirectly in physical contact with (e.g., affixed to and/or integrated within) various inanimate and/or animate units (e.g., inanimate structural components such as those used in building, and/or bridges, and/or machines, and/or animate structural components such as rodents and/or birds and/or other animals). Those skilled in the art will appreciate that the herein described powering and/or distribution approaches are illustrative, and that other entities and/or devices consistent with the teachings herein may be substituted and/or added. 
   Those skilled in the art will appreciate that herein the term “device,” as used in the context of devices comprising or coupled to a mote, is intended to represent but is not limited to transmitting devices and/or receiving devices dependent on context. For instance, in some exemplary contexts light device  140  is implemented using one or more light transmitters (e.g., coherent light transmission devices or non-coherent light transmission devices) and/or one or more light receivers (e.g., coherent light reception devices or non-coherent light reception devices) and/or one or more supporting devices (e.g., optical filters, hardware, firmware, and/or software). In some exemplary implementations, electrical/magnetic device  142  is implemented using one or more electrical/magnetic transmitters (e.g., electrical/magnetic transmission devices) and/or one or more electrical/magnetic receivers (e.g., electrical/magnetic reception devices) and/or one or more supporting devices (e.g., electrical/magnetic filters, supporting hardware, firmware, and/or software). In some exemplary implementations, pressure device  144  is implemented using one or more pressure transmitters (e.g., pressure transmission devices) and/or one or more pressure receivers (e.g., pressure reception devices) and/or one or more supporting devices (e.g., supporting hardware, firmware, and/or software). In some exemplary implementations, temperature device  156  is implemented using one or more temperature transmitters (e.g., temperature transmission devices) and/or one or more temperature receivers (e.g., temperature reception devices) and/or one or more supporting devices (e.g., supporting hardware, firmware, and/or software). In some exemplary implementations, volume device  158  is implemented using one or more volume transmitters (e.g., gas/liquid transmission devices) and/or one or more volume receivers (e.g., gas/liquid reception devices) and/or one or more supporting devices (e.g., supporting hardware, firmware, and/or software). In some exemplary implementations, inertial device  160  is implemented using one or more inertial transmitters (e.g., inertial force transmission devices) and/or one or more inertial receivers (e.g., inertial force reception devices) and/or one or more supporting devices (e.g., supporting hardware, firmware, and/or software). Those skilled in the art will recognize that although a quasi-stack architecture is utilized herein for clarity of presentation, other architectures may be substituted in light of the teachings herein. In addition, although not expressly shown, those having skill in the art will appreciate that entities and/or functions associated with concepts underlying Open System Interconnection (OSI) layer  2  (data link layers) and OSI layers  4 - 6  (transport-presentation layers) are present and active to allow/provide communications consistent with the teachings herein. Those having skill in the art will appreciate that these layers are not expressly shown/described herein for sake of clarity. 
   Referring now to  FIG. 2 , depicted are partial exploded views of motes  200 ,  250 , and  270  that form a part of a mote network. Mote  200  is illustrated as similar to mote  100  of mote appropriate network  150  ( FIG. 1 ), but with the addition of antenna steering unit  202 , antenna signal detection/generation unit  204  (“direction/generation” indicates unit  204  may perform either or both detection and generation), antenna control unit  206 , omni-directional antenna  218 , and directional antennas  208 ,  209 ; the other components of mote  100  are also present in mote  200 , but not explicitly shown for sake of clarity. The directional antennas described herein may be any suitable directional antennas consistent with the teachings herein, such as beam-forming antennas, beam-steering antennas, switched-beam antennas, horn antennas, and/or adaptive antennas. Although directional antennas  208 ,  209  are illustrated as horn antennas, those skilled in the art will appreciate that directional antennas  208 ,  209  are representative of any suitable device consistent with the teachings herein, such as Yagi antennas, log-periodic antennas, parabolic antennas, array antennas, horn antennas, and/or biconical antennas. The foregoing is also generally true for other directional antennas described herein. In addition, the inventor points out that in some implementations the antenna steering units described herein may include electromechanical systems such as those having piezoelectric components and/or those having micro-electro-mechanical system components; in some implementations, the antenna steering units may include electromagnetic systems. 
   Mote  250  is illustrated as similar to mote  100  of mote appropriate network  150  ( FIG. 1 ), but with the addition of antenna steering unit  252 , antenna signal generation/detection unit  254 , antenna control unit  256 , omnidirectional antenna  268 , and directional antennas  258 ,  259 . The other components of mote  100  are also present in mote  250 , but not explicitly shown for sake of clarity. The components of mote  250  function in fashions similar to like components described in relation to mote  200  and/or elsewhere herein. 
   Mote  270  is illustrated as similar to mote  100  of mote appropriate network  150  ( FIG. 1 ), but with the addition of antenna steering unit  252 , antenna signal generation/detection unit  274 , antenna control unit  276 , omnidirectional antenna  278 , and directional antennas  288 ,  289 . The other components of mote  100  are also present in mote  270 , but not explicitly shown for sake of clarity. The components of mote  270  function in fashions similar to like components described in relation to mote  200  and/or elsewhere herein. 
   Those skilled in the art will appreciate that there are various ways in which the directional antennas may be combined with the motes. In some implementations, semiconductor processing techniques are utilized to form at least a part of each mote having one or more directional antennas. In some implementations, micro-electro-mechanical-system or electrooptical techniques are utilized to form or control at least a part of each mote having one or more directional antennas. In some implementations, circuit techniques and circuit board substrates are used to form at least a part of each mote having one or more directional antennas. In some implementations, various combinations of the herein described techniques are used to form at least a part of each mote having one or more directional antennas. 
   II. Process(es) and/or Scheme(s) 
   Following are a series of flowcharts depicting implementations of processes and/or schemes. For ease of understanding, the flowcharts are organized such that the initial flowcharts present implementations via an overall “big picture” viewpoint and thereafter the following flowcharts present alternate implementations and/or expansions of the “big picture” flowcharts as either sub-steps or additional steps building on one or more earlier-presented flowcharts. Those having ordinary skill in the art will appreciate that the style of presentation utilized herein (e.g., beginning with a presentation of a flowchart(s) presenting an overall view and thereafter providing additions to and/or further details in subsequent flowcharts) generally allows for a rapid and easy understanding of the various process implementations. 
   With reference now to  FIG. 3 , depicted is a high level logic flowchart of a process. Method step  300  shows the start of the process. Method step  302  depicts adjusting a field of regard of a first-mote directional antenna. Method step  304  illustrates monitoring one or more indicators of received signal strength, signal-to-noise ratio, or other signal characteristic, of the first-mote directional antenna. Method step  306  shows determining a direction associated with a second mote in response to the monitored one or more indicators of the received signal strength of the first-mote directional antenna. Method step  308  depicts adjusting the field of regard of the first-mote directional antenna to orient toward the determined direction associated with the second mote. Method step  310  depicts the end of the process. Specific example implementations of the more general process implementations of  FIG. 3  are described following. 
   Referring now to  FIG. 4 , illustrated is a high-level logic flowchart depicting an alternate embodiment of the high-level logic flowchart of  FIG. 3 . Depicted is that in some embodiments method step  302  includes method step  400 . Method step  400  shows moving the field of regard such that the field of regard of the first-mote directional antenna will likely operably align with a beam of a second-mote directional antenna. (By convention, “field of regard” is sometimes used herein when describing an example wherein an antenna is likely to receive a signal while “beam” is used when describing an example wherein an antenna is likely to transmit a signal.) 
   In one embodiment of method step  400 , antenna control unit  256  directs antenna steering unit  252  to sweep a field of regard of directional antenna  258  at a rate likely to be different from that of a rate of sweep of a beam of another directional antenna. For example, antenna control units  206 ,  256  directing their respective antenna steering units  202 ,  252  to sweep their respective directional antennas  208 ,  258  at rates which are likely to be different. One implementation of the foregoing includes a network administrator pre-assigning different rates of sweep to antenna control units  206 ,  256 . For example, a network administrator (not shown) may assign antenna control unit  206  a rate of sweep of 360 degrees/unit-time and assigning antenna control unit  256  a rate of sweep of 361 degrees/unit-time and directing antenna control unit  206 ,  256  to direct their respective antenna steering units  202 ,  252  to rotate directional antennas  208 ,  258  for a time period long enough such that directional antenna  208  completes 360 total rotations. 
   Referring now to  FIG. 5 , illustrated is a high-level logic flowchart depicting several alternate embodiments of the high-level logic flowchart of  FIG. 4 . Depicted is that in some embodiments method step  400  includes method step  500 . Method step  500  shows rotating the field of regard at a rate of rotation varied by a quasi-random amount from a nominal rate of rotation of the first-mote directional antenna and the second-mote directional antenna. 
   In one embodiment of method step  500 , antenna control unit  256  directs antenna steering unit  252  to rotate a field of regard of directional antenna  258  at a rate of rotation varied by a quasi-random amount from a nominal rate of rotation shared by at least one other mote (as used herein, “nominal” generally means according to plan or design). For example, in one implementation antenna control unit  256  recalls from memory a known nominal rate of rotation and then uses embodied logic to vary that recalled nominal rate of rotation by some amount to devise a mote  250  resultant rate of rotation (e.g., 360 degrees/unit-time). Thereafter, antenna control unit  256  directs antenna steering unit  252  to rotate directional antenna  258  at the mote  250  resultant rate of rotation. At or around the same time, antenna control unit  202  engages in a similar set of operations to devise a mote  200  rate of rotation. Insofar as that the mote  200  rate of rotation and the mote  250  rate of rotation were devised by quasi-random variations on substantially the same nominal rates of rotation, it is likely that the mote  200  rate of rotation will be different than the mote  250  rate of rotation. Hence, eventually the field of regard of directional antenna  208  will operably align with the beam of directional antenna  258  such that signals may be respectively received/transmitted between the directional antennas. In some implementations, the directional antennas are rotated for a pre-specified period of time. In some implementations, the directional antennas are rotated until either a strong signal is detected or a timeout occurs. 
   In one approach, the network administrator or logic within one or more of the antenna control units  206 ,  256  may include logic that can reduce the time to align by monitoring levels, level changes, or rates of change of the signal indicator and adjusting the rate or direction of movement in response. For example, at angles of the field of regard where the indicator is relatively high or deviates in some manner from other angles, the rate of rotation can be adjusted using relatively straightforward logic to improve the likelihood of establishing the desired alignment. 
   Continuing to refer to  FIG. 5 , illustrated is that in some embodiments method step  400  includes method step  502 . Method step  502  shows moving the field of regard through at least two angles at a quasi-randomly selected rate of movement. 
   In one embodiment of method step  502 , antenna control unit  256  directs antenna steering unit  252  to move a field of regard of directional antenna  258  through a series of angles at a rate of movement derived from random number generation logic (e.g., moving the field of regard through a 90 degree arc in discrete increments of 5 degrees at time intervals dictated by a random number generator). 
   Continuing to refer to  FIG. 5 , illustrated is that in some embodiments method step  400  includes method step  504 . Method step  504  shows moving the field of regard for a quasi-randomly selected period of time. 
   In one embodiment of method step  504 , antenna control unit  256  directs antenna steering unit  252  to move a field of regard of directional antenna  258  at some rate of rotation for a period of time derived from random number generation logic (e.g., moving the field of regard at 360 degrees/unit-time for a first interval of time dictated by a random number generator, moving the field of regard at 45 degrees/unit time for a second interval of time dictated by the random number generator). 
   Referring now to  FIG. 6 , illustrated is a high-level logic flowchart depicting several alternate embodiments of the high-level logic flowchart of  FIG. 3 . Depicted is that in some embodiments method step  302  includes method step  600 . Method step  600  shows selectively varying one or more relative phases respectively associated with one or more antenna elements. 
   In one embodiment of method step  600 , antenna control unit  206  directs antenna steering unit  202  to selectively delay received signals such that a field of regard of directional antenna  208  is varied. 
   Continuing to refer to  FIG. 6 , shown is that in some implementations of method step  600 , selectively varying one or more relative phases respectively associated with one or more antenna elements can include selectively varying one or more relative dielectric constants respectively associated with the one or more antenna elements. Also shown is that in some implementations of method step  600 , selectively varying one or more relative phases respectively associated with one or more antenna elements can include selectively switching one or more delay elements respectively associated with the one or more antenna elements. Further shown is that in some implementations of method step  600 , selectively varying one or more relative phases respectively associated with one or more antenna elements can include selectively displacing the one or more antenna elements. In some implementations of method step  600 , such as where directional antenna  258  is implemented with discrete antenna elements (e.g., array antennas and/or Yagi antennas), antenna steering unit  252  delays one or more of the signals of the discrete antenna elements to steer the field of regard of directional antenna  258  in a desired fashion (e.g., by numerical techniques and/or delay lines). 
   Continuing to refer to  FIG. 6 , illustrated is that in some embodiments method step  302  includes method step  608 . Method step  608  shows selectively displacing at least a part of the first-mote directional antenna. In some implementations of method step  608 , such as instances where directional antenna  258  is implemented with a horn antenna or a biconical antenna, antenna steering unit  252  moves at least a part of the antenna, such as moving a feed of and/or rotating a horn antenna and/or moving a feed of and/or rotating a biconical antenna. 
   Continuing to refer to  FIG. 6 , shown is that in some embodiments method step  302  includes method step  610 . Method step  610  shows selectively tuning the first-mote directional antenna (e.g., via switchable tuning stubs). In some implementations of method step  610 , such as instances where directional antenna  258  is implemented with a tunable antenna (e.g., antennas having tuning stubs), antenna steering unit  252  either moves and/or switches in and out the various tuning stubs to direct the field of regard of directional antenna  258   
   Referring now to  FIG. 7 , illustrated is a high-level logic flowchart depicting an alternate embodiment of the high-level logic flowchart of  FIG. 3 . Depicted is that in some embodiments method step  304  includes method step  700 . Method step  700  shows logging one or more indicators of the received signal strength of the first-mote directional antenna. 
   In one embodiment of method step  700 , antenna control unit  256  directs antenna signal generation/detection unit  254  to log a received signal strength indicator of a known beacon signal. For example, in one implementation antenna signal generation/detection unit  254  contains a correlation detector having as a reference the beacon signal; the output of the correlation detector is stored to a memory which antenna control unit  256  can then access. Those having ordinary skill of the art will appreciate that other signal detection techniques, consistent with the teachings herein, may be substituted. 
   With reference now to  FIG. 8 , illustrated is a high-level logic flowchart depicting an alternate embodiment of the high-level logic flowchart of  FIG. 3 . Depicted is that in some embodiments method step  306  includes method step  800 . Method step  800  shows selectively varying a reception frequency. 
   In one embodiment of method step  800 , antenna control unit  256  directs antenna signal generation/detection unit  254  to vary a reference frequency of a demodulator from a nominal value. In some implementations, the way in which the reference frequency is varied is deterministic (e.g., varying above and below the nominal frequency by 5 Hz increments for predetermined and/or quasi-random periods of time). In some implementations, the way in which the reference frequency is varied is quasi-random (e.g., varying above and below the nominal frequency by quasi-random increments for predetermined periods of time). For example, in one implementation antenna signal generation/detection unit  254  contains demodulation logic whose reference frequency can be varied in fashions as described herein. Those having ordinary skill of the art will appreciate that other signal demodulation techniques, consistent with the teachings herein, may be substituted. 
   With reference now to  FIG. 9 , illustrated is a high-level logic flowchart depicting an alternate embodiment of the high-level logic flowchart of  FIG. 8 . Depicted is that in some embodiments method step  800  includes method step  900  and  902 . Method step  900  shows maintaining a first reception frequency during a first rate of movement. Method step  902  shows maintaining a second reception frequency during a second rate of movement. 
   In one embodiment of method step  900 , antenna control unit  256  directs antenna signal generation/detection unit  254  to maintain a first reference frequency of a demodulator while antenna control unit  256  is causing antenna steering unit  252  to sweep/rotate at a first rate. In one embodiment of method step  902 , antenna control unit  256  directs antenna signal generation/detection unit  254  to maintain a second reference frequency while antenna control unit  256  is causing antenna steering unit  252  to sweep/rotate at a second rate. In some implementations, the way in which the first and the second reference frequencies are chosen is deterministic (e.g., varying above and below some nominal frequency by 5 Hz increments for predetermined and/or quasi-random periods of time). In some implementations, the way in which the reference frequency is varied is quasi-random (e.g., varying above and below a nominal frequency by quasi-random amounts dictated by a random number generator). 
   With reference now to  FIG. 10 , illustrated is a high-level logic flowchart depicting an alternate embodiment of the high-level logic flowchart of  FIG. 3 . Depicted is that in some embodiments method step  306  includes method step  1000  and  1002 . Method step  1000  shows determining a substantially maximum signal power associated with a beacon signal. Method step  1002  depicts determining a direction of the field of regard of the first-mote directional antenna associated with the substantially maximum signal power. 
   In one embodiment of method step  1000 , antenna control unit  206  communicates with antenna signal generation/detection unit  254  to determine one or more times during which received signal strength of a beacon signal was at one or more substantially maximum values. In one embodiment of method step  1002 , antenna control unit  206  communicates with antenna steering unit  252  to determine one or more locations along an arc of movement of directional antenna  258  that correspond with the times at which the received signal strength of the beacon signal was at one or more substantially maximum values. 
   With reference now to  FIG. 11 , depicted is a high level logic flowchart of a process. Method step  1100  shows the start of the process. Method step  1102  depicts adjusting a beam of a second-mote directional antenna. Method step  1104  illustrates transmitting a signal over the beam of the second-mote directional antenna. Method step  1106  depicts the end of the process. Specific example implementations of the more general process implementations of  FIG. 11  are described following. 
   Referring now to  FIG. 12 , illustrated is a high-level logic flowchart depicting several alternate embodiments of the high-level logic flowchart of  FIG. 11 . Depicted is that in some embodiments method step  1102  includes method step  1200 . Method step  1200  shows selectively forming the beam of the second-mote directional antenna. 
   In one embodiment of method step  1200 , antenna control unit  206  directs antenna steering unit  202  to drive directional antenna  208  such that a beam is formed over one or more angular ranges. One example of the foregoing could include forming a series of beams across a series of angles. 
   Continuing to refer to  FIG. 12 , illustrated is that in some embodiments method step  1102  includes method step  1202 . Method step  1202  depicts selectively switching the beam of the second-mote directional antenna. 
   In some implementations of method step  1202 , antenna control unit  206  directs antenna steering unit  202  to switch elements of directional antenna  208  such that a beam is switched on across one or more angles. One example of the foregoing could include switching a series of discrete beams across a series of discrete angles. 
   Continuing to refer to  FIG. 12 , illustrated is that in some embodiments method step  1102  includes method step  1204 . Method step  1204  depicts selectively steering the beam of the second-mote directional antenna. 
   In some implementations of method step  1204 , antenna control unit  206  directs antenna steering unit  202  to selectively steer a beam of directional antenna  208  such that a beam is moved across one or more angles. One example of the foregoing could include causing a horn or a biconical antenna to move across a series of angles (e.g., rotate in a circle). 
   Continuing to refer to  FIG. 12 , illustrated is that in some embodiments method step  1102  includes method step  1206 . Method step  1206  depicts selectively adapting the beam of the second-mote directional antenna. 
   In some implementations of method step  1206 , antenna control unit  206  directs antenna steering unit  202  to selectively adapt one or more beams of directional antenna  208  such that a beam is moved across one or more angles. One example of the foregoing could include selectively adapting the beam of the second-mote directional antenna. 
   With reference again to  FIGS. 3 and 11 , method step  302  of  FIG. 3 , and its supporting text, show and/or describe adjusting a field of regard of a first-mote directional antenna. Method step  1102  of  FIG. 11 , and its supporting text, illustrate and/or describe adjusting a beam of a second-mote directional antenna (e.g., directional antenna  208  of mote  200 ). 
     FIGS. 4-6  show and/or describe several implementations of adjusting a field of regard of the first-mote directional antenna. The inventor points out that implementations substantially analogous to those shown for method step  302  are also contemplated for method step  1102 . Specifically, each shown/described example of adjusting the field of regard as described elsewhere herein will in general have a corresponding implementation by which the beam of a second-mote directional antenna is analogously adjusted. Those having skill in the art will appreciate that insofar as that transmitting and receiving are essentially mirror operations and that beam forming and defining field of regard are complementary actions, the examples of adjusting the field of regard set forth above may also be viewed as constituting examples of adjusting beams. In light of the foregoing, those having skill in the art will appreciate that  FIGS. 4-6  and their supporting texts, combined with generally known aspects of beam forming, teach such beam forming implementations; consequently, the beam adjusting implementations are not expressly redescribed here for sake of clarity. 
   With reference now to  FIG. 13 , illustrated is a high-level logic flowchart depicting an alternate embodiment of the high-level logic flowchart of  FIG. 11 . Depicted is that in some embodiments method step  1104  includes method step  1300 . Method step  1300  shows selectively varying a transmission frequency. 
   In one embodiment of method step  1300 , antenna control unit  206  directs signal generation/detection unit  204  to vary a carrier frequency of a modulator from a nominal value. In some implementations, the way in which the carrier frequency is varied is deterministic (e.g., varying above and below the nominal frequency by 5 Hz increments for predetermined and/or quasi-random periods of time). In some implementations, the way in which the carrier frequency is varied is quasi-random (e.g., varying above and below the nominal frequency by quasi-random amounts for predetermined periods of time). 
   In one implementation, antenna signal generation/detection unit  204  contains a modulator that combines a known beacon signal with the carrier signal which is then transmitted from directional antenna  208 . Those having ordinary skill of the art will appreciate that other signal generation techniques, consistent with the teachings herein, may be substituted. 
   With reference now to  FIG. 14 , illustrated is a high-level logic flowchart depicting an alternate embodiment of the high-level logic flowchart of  FIG. 11 . Depicted is that in some embodiments method step  1104  includes method steps  1400  and  1402 . Method step  1400  shows maintaining a first transmission frequency during a first rate of movement (e.g., sweep and/or rotation). Method step  1402  shows maintaining a second transmission frequency during a second rate of movement (e.g., sweep and/or rotation). 
   In one embodiment of method step  1400 , antenna control unit  206  directs antenna signal generation/detection unit  204  to maintain a first carrier frequency of a modulator while antenna control unit  206  is causing antenna steering unit  202  to sweep/rotate at a first rate. In one embodiment of method step  1400 , antenna control unit  206  directs antenna signal generation/detection unit  204  to maintain a second carrier frequency of a modulator while antenna control unit  206  is causing antenna steering unit  202  to sweep/rotate at a second rate. In some implementations, the way in which the carrier frequency is varied is deterministic (e.g., varying above and below the nominal frequency by 5 Hz increments for predetermined and/or quasi-random periods of time). In some implementations, the way in which the carrier frequency is varied is quasi-random (e.g., varying above and below the nominal frequency by quasi-random amounts for predetermined periods of time). 
   Referring now to  FIG. 15 , illustrated is a high-level logic flowchart depicting an alternate embodiment of the high-level logic flowchart of  FIG. 11 . Depicted is that in some embodiments method step  1104  includes method steps  1500  and  1502 . Method step  1500  shows detecting an initiation signal. Method step  1502  depicts initiating at least one of said adjusting a beam of a second-mote directional antenna and/or said transmitting a signal over the beam of the second-mote directional antenna in response to said detecting the initiation signal. 
   In one embodiment of method step  1500 , antenna signal generation/detection unit  204  detects an incoming pre-defined seek-mote-antennas signal over directional antenna  208 . Signal generation/detection unit  204  informs antenna control unit  206  that the seek-mote-antennas signal has been received. In response, antenna control unit  206  directs antenna signal generation/detection unit  204  to generate a pre-defined beacon signal and/or communicates with antenna steering unit  252  to begin adjusting a beam of directional antenna  208  as described herein (e.g., by moving the beam in an arc or circle through a discrete set of angles, etc.). 
   With reference now to  FIG. 16 , depicted is a high level logic flowchart of a process. Method step  1600  shows the start of the process. Method step  1602  depicts adjusting a field of regard of a first-mote directional antenna in response to a direction associated with a second-mote directional antenna. Method step  1604  illustrates transmitting a signal from the first-mote directional antenna and/or receiving a signal from the first-mote directional antenna (e.g., transmitting the signal over a beam of the first-mote directional antenna and/or receiving the signal through a field of regard of the first-mote directional antenna). Method step  1606  depicts the end of the process. Specific example implementations of the more general process implementations of  FIG. 16  are described following. 
   Referring now to  FIG. 17 , illustrated is a high-level logic flowchart depicting an alternate embodiment of the high-level logic flowchart of  FIG. 16 . Depicted is that in some embodiments method step  1602  includes method step  1700 . Method step  1700  shows localizing the second-mote directional antenna. Specific example implementations of the more general process implementations of  FIG. 17  are described following. 
   With reference now to  FIG. 18 , illustrated is a high-level logic flowchart depicting an alternate embodiment of the high-level logic flowchart of  FIG. 17 . Depicted is that in some embodiments method step  1700  includes method steps  302 ,  304 , and  306 . Method steps  302 ,  304 , and  306 , as well as various multiple implementations of such steps, are described elsewhere herein—e.g., FIGS.  3 - 6 —and are hence not redescribed here for sake of clarity. However, it is to be understood that method steps  302 ,  304 , and  306  as illustrated in  FIG. 18  are intended to incorporate and/or represent substantially all aspects and/or facets of the various implementations of method steps  302 ,  304 , and  306  as shown and described elsewhere herein, unless context requires otherwise. 
   Those having skill in the art will recognize that the state of the art has progressed to the point where for many design choices there is little distinction left between hardware and software implementations of aspects of systems; the use of hardware or software is generally (but not always, in that in certain contexts the choice between hardware and software can become significant) a design choice representing cost vs. efficiency tradeoffs. Those having skill in the art will appreciate that there are various vehicles by which processes and/or systems described herein can be effected (e.g., hardware, software, and/or firmware), and that the preferred vehicle will vary with the context in which the processes are deployed. For example, if an implementer determines that speed and accuracy are paramount, the implementer may opt for a hardware and/or firmware vehicle; alternatively, if flexibility is paramount, the implementer may opt for a solely software implementation; or, yet again alternatively, the implementer may opt for some combination of hardware, software, and/or firmware. Hence, there are several possible vehicles by which the processes described herein may be effected, none of which is inherently superior to the other in that any vehicle to be utilized is a choice dependent upon the context in which the vehicle will be deployed and the specific concerns (e.g., speed, flexibility, or predictability) of the implementer, any of which may vary. Those skilled in the art will recognize that optical aspects of implementations will require optically-oriented hardware, software, and or firmware. 
   The foregoing detailed description has set forth various embodiments of the devices and/or processes via the use of block diagrams, flowcharts, and/or examples. Insofar as such block diagrams, flowcharts, and/or examples contain one or more functions and/or operations, it will be understood as notorious by those within the art that each function and/or operation within such block diagrams, flowcharts, or examples can be implemented, individually and/or collectively, by a wide range of hardware, software, firmware, or virtually any combination thereof. In one embodiment, several portions of the subject matter described herein may be implemented via Application Specific Integrated Circuits (ASICs), Field Programmable Gate Arrays (FPGAs), digital signal processors (DSPs), or other integrated formats. However, those skilled in the art will recognize that some aspects of the embodiments disclosed herein, in whole or in part, can be equivalently implemented in standard integrated circuits, as one or more computer programs running on one or more computers (e.g., as one or more programs running on one or more computer systems), as one or more programs running on one or more processors (e.g., as one or more programs running on one or more microprocessors), as firmware, or as virtually any combination thereof, and that designing the circuitry and/or writing the code for the software and or firmware would be well within the skill of one of skill in the art in light of this disclosure. In addition, those skilled in the art will appreciate that the mechanisms of the subject matter described herein are capable of being distributed as a program product in a variety of forms, and that an illustrative embodiment of the subject matter described herein applies equally regardless of the particular type of signal bearing media used to actually carry out the distribution. Examples of a signal bearing media include, but are not limited to, the following: recordable type media such as floppy disks, hard disk drives, CD ROMs, digital tape, and computer memory; and transmission type media such as digital and analog communication links using TDM or IP based communication links (e.g., packet links). 
   In a general sense, those skilled in the art will recognize that the various aspects described herein which can be implemented, individually and/or collectively, by a wide range of hardware, software, firmware, or any combination thereof can be viewed as being composed of various types of “electrical circuitry.” Consequently, as used herein “electrical circuitry” includes, but is not limited to, electrical circuitry having at least one discrete electrical circuit, electrical circuitry having at least one integrated circuit, electrical circuitry having at least one application specific integrated circuit, electrical circuitry forming a general purpose computing device configured by a computer program (e.g., a general purpose computer configured by a computer program which at least partially carries out processes and/or devices described herein, or a microprocessor configured by a computer program which at least partially carries out processes and/or devices described herein), electrical circuitry forming a memory device (e.g., forms of random access memory), and/or electrical circuitry forming a communications device (e.g., a modem, communications switch, or optical-electrical equipment). 
   Those skilled in the art will recognize that it is common within the art to describe devices and/or processes in the fashion set forth herein, and thereafter use standard engineering practices to integrate such described devices and/or processes into mote processing systems. That is, at least a portion of the devices and/or processes described herein can be integrated into a mote processing system via a reasonable amount of experimentation. Those having skill in the art will recognize that a typical mote processing system generally includes one or more of a memory such as volatile and non-volatile memory, processors such as microprocessors and digital signal processors, computational entities such as operating systems, user interfaces, drivers, sensors, actuators, applications programs, one or more interaction devices, such as USB ports, control systems including feedback loops and control motors (e.g., feedback for sensing position and/or velocity; control motors for moving and/or adjusting components and/or quantities). A typical mote processing system may be implemented utilizing any suitable available components, such as those typically found in mote-appropriate computing/communication systems, combined with standard engineering practices. Specific examples of such components entail commercially described components such as Intel Corporation&#39;s mote components and supporting hardware, software, and firmware. 
   The foregoing described aspects depict different components contained within, or connected with, different other components. It is to be understood that such depicted architectures are merely exemplary, and that in fact many other architectures can be implemented which achieve the same functionality. In a conceptual sense, any arrangement of components to achieve the same functionality is effectively “associated” such that the desired functionality is achieved. Hence, any two components herein combined to achieve a particular functionality can be seen as “associated with” each other such that the desired functionality is achieved, irrespective of architectures or intermedial components. Likewise, any two components so associated can also be viewed as being “operably connected” or “operably coupled” to each other to achieve the desired functionality. 
   While particular aspects of the present subject matter described herein have been shown and described, it will be obvious to those skilled in the art that, based upon the teachings herein, changes and modifications may be made without departing from the subject matter described herein and its broader aspects and, therefore, the appended claims are to encompass within their scope all such changes and modifications as are within the true spirit and scope of the subject matter described herein. Furthermore, it is to be understood that the invention is defined by the appended claims. It will be understood by those within the art that, in general, terms used herein, and especially in the appended claims (e.g., bodies of the appended claims) are generally intended as “open” terms (e.g., the term “including” should be interpreted as “including but not limited to,” the term “having” should be interpreted as “having at least,” the term “includes” should be interpreted as “includes but is not limited to,” etc.). It will be further understood by those within the art that if a specific number of an introduced claim recitation is intended, such an intent will be explicitly recited in the claim, and in the absence of such recitation no such intent is present. For example, as an aid to understanding, the following appended claims may contain usage of the introductory phrases “at least one” and “one or more” to introduce claim recitations. However, the use of such phrases should NOT be construed to imply that the introduction of a claim recitation by the indefinite articles “a” or “an” limits any particular claim containing such introduced claim recitation to inventions containing only one such recitation, even when the same claim includes the introductory phrases “one or more” or “at least one” and indefinite articles such as “a” or “an” (e.g., “a” and/or “an” should typically be interpreted to mean “at least one” and/or “one or more”); the same holds true for the use of definite articles used to introduce claim recitations. In addition, even if a specific number of an introduced claim recitation is explicitly recited, those skilled in the art will recognize that such recitation should typically be interpreted to mean at least the recited number (e.g., the bare recitation of “two recitations,” without other modifiers, typically means at least two recitations, or two or more recitations). Furthermore, in those instances where a convention analogous to “at least one of A, B, and C, etc.” is used, in general such a construction is intended in the sense of one having skill in the art would understand the convention (e.g., “a system having at least one of A, B, and C” would include but not be limited to systems that have A alone, B alone, C alone, A and B together, A and C together, B and C together, and/or A, B, and C together etc.). In those instances where a convention analogous to “at least one of A, B, or C, etc.” is used, in general such a construction is intended in the sense of one having skill in the art would understand the convention (e.g., “a system having at least one of A, B, or C” would include but not be limited to systems that have A alone, B alone, C alone, A and B together, A and C together, B and C together, and/or A, B, and C together, etc.).