WO2003098851A1 - Lprf device wake up using wireless tag - Google Patents
Lprf device wake up using wireless tag Download PDFInfo
- Publication number
- WO2003098851A1 WO2003098851A1 PCT/US2003/014987 US0314987W WO03098851A1 WO 2003098851 A1 WO2003098851 A1 WO 2003098851A1 US 0314987 W US0314987 W US 0314987W WO 03098851 A1 WO03098851 A1 WO 03098851A1
- Authority
- WO
- WIPO (PCT)
- Prior art keywords
- wrt
- wireless
- class
- receiver
- component
- Prior art date
Links
- 230000004044 response Effects 0.000 claims abstract description 28
- 238000004891 communication Methods 0.000 claims description 219
- 238000000034 method Methods 0.000 claims description 77
- 230000005540 biological transmission Effects 0.000 claims description 51
- 238000004519 manufacturing process Methods 0.000 claims description 13
- 238000001914 filtration Methods 0.000 claims description 8
- 230000001413 cellular effect Effects 0.000 claims description 5
- 238000012216 screening Methods 0.000 abstract description 5
- 230000015572 biosynthetic process Effects 0.000 description 32
- 230000008569 process Effects 0.000 description 25
- 230000006870 function Effects 0.000 description 15
- 241000854291 Dianthus carthusianorum Species 0.000 description 14
- 101100545272 Caenorhabditis elegans zif-1 gene Proteins 0.000 description 10
- 238000005516 engineering process Methods 0.000 description 10
- 230000008901 benefit Effects 0.000 description 7
- 230000006399 behavior Effects 0.000 description 6
- 230000001965 increasing effect Effects 0.000 description 6
- 230000004048 modification Effects 0.000 description 5
- 238000012986 modification Methods 0.000 description 5
- 230000006978 adaptation Effects 0.000 description 4
- 230000008859 change Effects 0.000 description 4
- 238000010586 diagram Methods 0.000 description 4
- 230000001976 improved effect Effects 0.000 description 4
- 230000001939 inductive effect Effects 0.000 description 4
- 238000012423 maintenance Methods 0.000 description 4
- 230000006855 networking Effects 0.000 description 4
- 230000003213 activating effect Effects 0.000 description 3
- 230000004913 activation Effects 0.000 description 3
- 230000003466 anti-cipated effect Effects 0.000 description 3
- 238000013459 approach Methods 0.000 description 3
- 238000013461 design Methods 0.000 description 3
- 239000002994 raw material Substances 0.000 description 3
- 101100327917 Caenorhabditis elegans chup-1 gene Proteins 0.000 description 2
- 230000009471 action Effects 0.000 description 2
- 238000004458 analytical method Methods 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 238000007726 management method Methods 0.000 description 2
- 239000000463 material Substances 0.000 description 2
- 230000005012 migration Effects 0.000 description 2
- 238000013508 migration Methods 0.000 description 2
- 238000012544 monitoring process Methods 0.000 description 2
- 238000012545 processing Methods 0.000 description 2
- 230000001737 promoting effect Effects 0.000 description 2
- 230000001902 propagating effect Effects 0.000 description 2
- 238000005204 segregation Methods 0.000 description 2
- 230000035945 sensitivity Effects 0.000 description 2
- 239000000126 substance Substances 0.000 description 2
- 230000001360 synchronised effect Effects 0.000 description 2
- 230000002123 temporal effect Effects 0.000 description 2
- 230000002618 waking effect Effects 0.000 description 2
- IRLPACMLTUPBCL-KQYNXXCUSA-N 5'-adenylyl sulfate Chemical compound C1=NC=2C(N)=NC=NC=2N1[C@@H]1O[C@H](COP(O)(=O)OS(O)(=O)=O)[C@@H](O)[C@H]1O IRLPACMLTUPBCL-KQYNXXCUSA-N 0.000 description 1
- 241000196324 Embryophyta Species 0.000 description 1
- 206010034960 Photophobia Diseases 0.000 description 1
- 230000004888 barrier function Effects 0.000 description 1
- 230000007613 environmental effect Effects 0.000 description 1
- 239000004744 fabric Substances 0.000 description 1
- 230000036541 health Effects 0.000 description 1
- 230000003993 interaction Effects 0.000 description 1
- 230000002452 interceptive effect Effects 0.000 description 1
- 238000011835 investigation Methods 0.000 description 1
- 208000013469 light sensitivity Diseases 0.000 description 1
- 235000013372 meat Nutrition 0.000 description 1
- 230000007246 mechanism Effects 0.000 description 1
- 230000008520 organization Effects 0.000 description 1
- 238000012856 packing Methods 0.000 description 1
- 239000003973 paint Substances 0.000 description 1
- 238000010422 painting Methods 0.000 description 1
- 230000000135 prohibitive effect Effects 0.000 description 1
- 230000002035 prolonged effect Effects 0.000 description 1
- 230000009467 reduction Effects 0.000 description 1
- 230000004043 responsiveness Effects 0.000 description 1
- 230000008685 targeting Effects 0.000 description 1
- 238000011144 upstream manufacturing Methods 0.000 description 1
Classifications
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W52/00—Power management, e.g. TPC [Transmission Power Control], power saving or power classes
- H04W52/02—Power saving arrangements
- H04W52/0209—Power saving arrangements in terminal devices
- H04W52/0225—Power saving arrangements in terminal devices using monitoring of external events, e.g. the presence of a signal
- H04W52/0229—Power saving arrangements in terminal devices using monitoring of external events, e.g. the presence of a signal where the received signal is a wanted signal
-
- G—PHYSICS
- G06—COMPUTING; CALCULATING OR COUNTING
- G06K—GRAPHICAL DATA READING; PRESENTATION OF DATA; RECORD CARRIERS; HANDLING RECORD CARRIERS
- G06K7/00—Methods or arrangements for sensing record carriers, e.g. for reading patterns
- G06K7/0008—General problems related to the reading of electronic memory record carriers, independent of its reading method, e.g. power transfer
-
- G—PHYSICS
- G06—COMPUTING; CALCULATING OR COUNTING
- G06K—GRAPHICAL DATA READING; PRESENTATION OF DATA; RECORD CARRIERS; HANDLING RECORD CARRIERS
- G06K7/00—Methods or arrangements for sensing record carriers, e.g. for reading patterns
- G06K7/10—Methods or arrangements for sensing record carriers, e.g. for reading patterns by electromagnetic radiation, e.g. optical sensing; by corpuscular radiation
- G06K7/10009—Methods or arrangements for sensing record carriers, e.g. for reading patterns by electromagnetic radiation, e.g. optical sensing; by corpuscular radiation sensing by radiation using wavelengths larger than 0.1 mm, e.g. radio-waves or microwaves
- G06K7/10019—Methods or arrangements for sensing record carriers, e.g. for reading patterns by electromagnetic radiation, e.g. optical sensing; by corpuscular radiation sensing by radiation using wavelengths larger than 0.1 mm, e.g. radio-waves or microwaves resolving collision on the communication channels between simultaneously or concurrently interrogated record carriers.
- G06K7/10079—Methods or arrangements for sensing record carriers, e.g. for reading patterns by electromagnetic radiation, e.g. optical sensing; by corpuscular radiation sensing by radiation using wavelengths larger than 0.1 mm, e.g. radio-waves or microwaves resolving collision on the communication channels between simultaneously or concurrently interrogated record carriers. the collision being resolved in the spatial domain, e.g. temporary shields for blindfolding the interrogator in specific directions
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04B—TRANSMISSION
- H04B1/00—Details of transmission systems, not covered by a single one of groups H04B3/00 - H04B13/00; Details of transmission systems not characterised by the medium used for transmission
- H04B1/02—Transmitters
- H04B1/04—Circuits
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W84/00—Network topologies
- H04W84/18—Self-organising networks, e.g. ad-hoc networks or sensor networks
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02D—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN INFORMATION AND COMMUNICATION TECHNOLOGIES [ICT], I.E. INFORMATION AND COMMUNICATION TECHNOLOGIES AIMING AT THE REDUCTION OF THEIR OWN ENERGY USE
- Y02D30/00—Reducing energy consumption in communication networks
- Y02D30/70—Reducing energy consumption in communication networks in wireless communication networks
Definitions
- Twitchell U.S. patent application serial no. 60/380,195 titled DYNAMIC OBJECT IDENTIFIER BASED NETWORK FORMATION, which was filed on May 14, 2002, pending, which is incorporated herein by reference
- Twitchell U.S. patent application serial no. 60/380,670 titled LOW POWER RADIO FREQUENCY COMMUNICATIONS DEVICE WAKE UP USING OBJECT IDENTIFIERS AND WIRELESS TAGS, which was filed on May 16, 2002, pending, which is incorporated herein by reference.
- the present invention relates broadly to wireless transceivers, including the design of a wireless transceiver as well as to forming ad hoc networks with wireless transceivers and to communication protocols between wireless transceivers.
- Wireless ad hoc networks allow node-to-node communication without central control or wired infrastructure. Such networks may have dynamic, randomly-changing, multihop topologies composed of wireless data communication links between the nodes.
- Ad hoc networks are advantageous because they are inexpensive, fault-tolerant, and flexible.
- Various known methods relate to data transmission within an ad hoc wireless data communication network. However, most known methods do not address self-configuration of wireless nodes for the formation and maintenance of efficient network topology.
- Known ad hoc networking methods typically organize the network on the basis of geographic proximity of the nodes or the strength of signals received by the various nodes.
- Known methods of ad hoc network organization also require nodes to regularly transmit network information to all other nodes in the network, which results in increased radio traffic and interference. Increased radio interference inhibits the formation and maintenance of ad hoc networks having a large number of nodes and requires nodes to transmit at a greater power, which reduces their battery life.
- Bluetooth radio technology Short range wireless technology utilizing standards based radio technology, such as the Bluetooth radio standard (hereinafter “Bluetooth”), promises to remove price barriers to mobile network use. By doing so, wireless devices are becoming available for applications where wired networks have been impracticable and in which prior wireless communication networks have been too expensive or inflexible.
- Bluetooth radio technology is an ad hoc networking solution for personal data applications, it provides for only a limited number of communication channels, thereby restricting the number of Bluetooth devices that can communicate over an ad hoc network at any given time.
- asset tracking wireless data networks are known for use in warehouse management and other asset-tracking applications. However, existing wireless data network technologies are not well suited to asset tracking, which involves a large number of network nodes (e.g., hundreds or even thousands). Furthermore, existing wireless technologies are cost prohibitive, are prone to radio frequency (RF) interference, and consume a large amount of electrical power. Accordingly, wireless data networks are not commonly used in asset tracking.
- RF radio frequency
- Bluetooth radios Another obstacle to widespread implementation of the use of standards based radios, such as Bluetooth radios, especially in asset-tracking applications, is the limited life of the radio due to its power consumption.
- Each standards based radio associated with an asset being tracked often operates from a battery that is included within the housing of the radio.
- the battery is able to effectively power the radio for only a short period of time.
- a Bluetooth radio whether of the class 1, 2, or 3 type, utilizes about 40 mAh of current when actively receiving transmissions. Even in standby mode, wherein the radio is neither receiving nor transmitting but is in a low power consumption mode from which it can quickly return to an active state, such a radio utilizes about 10 mAh of current.
- Bluetooth radios therefore can be expected to last less than about ninety (90) days, and only half that long in fairly active asset-tracking applications.
- a wireless transceiver includes a low power radio frequency (LPRF) communications device capable of powering down to conserve energy and capable of powering up in response to an electronic signal.
- the wireless transceiver further includes, in accordance with the present invention, a second receiver that is physically connected to the input of the LPRF communications device and that provides the electronic signal for powering up the LPRF communications component in response to receipt by the second receiver of a radio frequency broadcast.
- LPRF low power radio frequency
- a WRT includes a low power radio frequency (LPRF) communications component capable of powering down to conserve energy and capable of powering up in response to an electronic signal.
- the LPRF communications component includes a receiver and a transmitter for two-way radio communications.
- the WRT also includes a second receiver physically connected to the input of the LPRF communications component. In response to receipt by the second receiver of a radio frequency broadcast, the second receiver provides the electronic signal in order to power up the LPRF commumcations component.
- LPRF radio frequency
- the LPRF communications component and second receiver are hardwired within a housing of the WRT.
- the WRT also may include, hardwired within the housing, a reader component for reading WTs disposed externally to and in proximity of the WRT.
- the reader component preferably is physically connected to the LPRF communications component for data exchange therebetween.
- a WRT which can be used to read one or more WTs that are disposed externally to and in proximity of the WRT in response to a radio frequency broadcast, draws only on the order of approximately 10 to 15 ⁇ A of electric current when awaiting for and receiving the radio frequency broadcast.
- a LPRF communications component which includes a receiver and a transmitter for two-way radio communications
- a second receiver are hardwired within a housing of the WRT.
- a reader component also is hardwired within the WRT housing in physical connection with the LPRF communications component for data exchange therebetween.
- a method of manufacturing a WRT which can be used to read one or more WTs disposed externally to and in proximity of the WRT, includes the step of hardwiring within a housing of the WRT: a low power radio frequency (LPRF) communications component capable of powering down to conserve battery power and capable of powering up in response to an electronic signal, wherein the LPRF communications component includes a receiver and a transmitter for two-way radio communications; and a second receiver physically connected to the input of the LPRF communications component, with the second receiver generating the electronic signal in order to power up the LPRF communications component in response to receipt by the second receiver of a radio frequency broadcast.
- the method also may include the step of hardwiring into the WRT housing a reader component for reading the WTs, with the reader component physically connected to the LPRF communications component for data exchange therebetween;
- the WRT preferably draws on the order of only about 10 to 15 ⁇ A of current when awaiting for and receiving the radio frequency broadcast.
- the LPRF communications component in particular draws on the order of about 40 mA of current when powered up; draws on the order of about 10 mA of current when powered down to a "standby" mode; and draws approximately no current when powered down to an "off state.
- the LPRF communications component preferably comprises a Bluetooth radio or other standards based radio.
- the second receiver draws on the order of 15 ⁇ A of electric charge when awaiting for and receiving the radio frequency broadcast.
- the second receiver provides the electronic signal by toggling a line connecting the second receiver with the LPRF communications component, and the LPRF communications device is programmed to power down when no longer actively transmitting or receiving.
- the second receiver provides power to the voltage regulators supplying power to the LPRF communications device causing it to power up or "boot up.”
- the second receiver may be passive, i.e., have no energy source; however, the second receiver preferably includes a battery to increase its sensitivity and, thus, significantly increase the range within which it may detect a transmission over the range that it otherwise would have without use of an energy source.
- a modified wireless tag may comprise the second receiver.
- Such a modified wireless tag preferably includes: a radio frequency detector component, a memory component, and an application specific integrated circuit (ASIC) component. Either the memory component or the ASIC component may stores an identification therein.
- ASIC application specific integrated circuit
- the radio frequency broadcast to which the second receiver responds by providing the electronic signal at the input of the LPRF communications device, preferably includes therein the identification that is stored within the WRT when the broadcast is intended to activate the WRT.
- the second receiver preferably responds to a radio frequency broadcast by providing the electronic signal at the input of the LPRF communications device only if the radio frequency broadcast includes the identification.
- the identification itself may be permanently stored within the second receiver.
- the identification also may uniquely identify the WRT or, alternatively, the identification may represent a WRT class or a WT class. The identification may also represent a selected plurality of WRTs.
- the second receiver preferably includes an antenna, which may be the same as or different from the antenna utilized by the LPRF communications component or different.
- the second receiver also preferably has an energy source, which may be the same as or different from the energy source utilized by the LPRF communications component.
- the WRTs of the present invention are preferably utilized in asset-tracking applications.
- the radio frequency utilized by the WRTs preferably is about 2.4 GHz.
- the WTs that are read by the reader components of the WRTs preferably are associated with the assets to be tracked, with each of these WTs comprising a radio-frequency transponder.
- WRTs themselves may be associated with assets to be tracked, thereby serving the function of WTs.
- the WRT may include a sensor component physically connected to the LPRF communications component for data exchange therebetween.
- the sensor component may include a motion detector; a digital camera; a microphone; a thermometer; and/or a global positioning system (GPS) receiver.
- GPS global positioning system
- the WRT further may include an external network communications component physically connected to the LPRF communications component for data exchange therebetween.
- the external network communications component may comprise a satellite transceiver and/or a cellular transceiver.
- an asset-tracking system utilizes one or more of the foregoing WRTs in accordance with the present invention, including a method of forming an ad hoc hierarchical data communication network utilizing one or more WRTs.
- Such an asset-tracking system also preferably utilizes class-based, ad hoc hierarchical networks.
- each WRT includes a designation with a first plurality of WRTs having a first common designation and a second plurality of WRTs having a second common designation different from the first common designation.
- the method includes the steps of: forming an ad hoc hierarchical network for each of the first plurality and second plurality of WRTs; and communicating to an external network from each WRT of each ad hoc hierarchical network by, (i) establishing a communication link between each WRT in a level of the ad hoc hierarchical network, other than the highest level, with a WRT in the next higher level of the ad hoc hierarchical network such that WRTs pass communications upward in the ad hoc hierarchical network; and (ii) establishing a communication link between a WRT in the highest level of the ad hoc hierarchical network and an external network access transceiver, such that communications from WRTs in the ad hoc hierarchical network are passed through the WRT in the highest level of the ad hoc hierarchical network to the external network access transceiver.
- each WRT includes a class designation with a first plurality of WRTs having a first class designation and a second plurality of WRTs having a second class designation different from the first class designation.
- the method includes the steps of: forming an ad hoc hierarchical class based network for each of the first plurality and second plurality of WRTs; and communicating to an external network from each WRT of each ad hoc hierarchical class based network by, (i) establishing a communication link between each WRT in a level of the ad hoc hierarchical class based network, other than the highest level, with a WRT in the next higher level of the ad hoc hierarchical class based network such that WRTs pass communications upward in the ad hoc hierarchical class based network; and (ii) establishing a communication link between a WRT in the highest level of the ad hoc hierarchical class based network and an external network access transceiver, such that communications from WRTs in the ad hoc hierarchical class based network are passed through the WRT in the highest level of the ad hoc hierarchical class based network to the external network access transceiver.
- the step of forming an ad hoc hierarchical class based network for each of the first plurality and second plurality of WRTs preferably includes the steps of: filtering, by each WRT, transmissions from other WRTs for an identification of its class designation within the transmission; transmitting, from a primary WRT of the first plurality, a primary availability signal including an identification of the first class designation and an identification of the primary WRT transmitting the primary availability signal; transmitting, from a primary WRT of the second plurality, a primary availability signal including an identification of the second class designation and an identification of the primary WRT of the second plurality transmitting the primary availability signal; transmitting, from a WRT receiving a primary availability signal having an identification therein of its class designation, a registration signal including an identification of the class designation and an identification of the WRT transmitting the registration signal; and identifying a WRT transmitting a registration signal as a secondary WRT by a primary WRT of the same class designation, the primary WRT thereby assuming a higher level in the ad
- a method for communicating to a WRT in accordance with the foregoing from WTs located within the broadcast range of the WRT includes the steps of: fransmitting by the WRT a communication at a first power level such that only a first group of the WTs receive the broadcast, the communication including a command causing each of the first group of WTs not to respond to a subsequent broadcast; and subsequent thereto transmitting by the WRT a communication at a second power level greater than the first power level such that a second group of WTs greater than and including the first group of WTs receive the broadcast, but such that only a limited number of WTs of the second group respond to the broadcast, the limited number of WTs excluding the first group of WTs.
- a second method for communicating to a WRT in accordance with the foregoing from WTs located within the broadcast range of the WRT applies to the situation wherein the WTs exceed the number of WTs from which communications ordinarily can be received by the WRT without radio frequency interference due to its channel capacity.
- the method includes the steps of: transmitting by the WRT a communication at a first power level such that only a first group of the
- WTs receive the broadcast, the first group in number of WTs being not greater than the number of
- the communication including a command causing each of the first group of WTs not to respond to a subsequent broadcast; and subsequent thereto transmitting by the WRT a communication at a second power level greater than the first power level such that a second group of
- WTs greater than and including the first group of WTs receive the broadcast, but such that only a limited number of WTs of the second group respond to the broadcast, the limited number of WTs excluding the first group of WTs and comprising not greater than the number of WTs from which communications can be received by the WRT without radio frequency interference due to its channel capacity.
- Fig. 1 illustrates various network components and an example arrangement in the context of a warehouse application in accordance with the present invention
- FIG. 2 is a flowchart illustrating a preferred operation of the CBNF routine operating on Wireless Reader Tags in accordance with the present invention
- Figs. 3-11 illustrate a time sequence that depicts Wireless Reader Tags of arbitrary classes "circle” and “triangle,” transmitting a series of messages in the course of self-organizing a hierarchical network using a bottom-up propagation approach;
- Figs. 6A, 8A, 9 A, 10A, and 11A illustrate the topology of the ad hoc network formed at the stages depicted in corresponding Figs. 6, 8, 9, 10, and 11, respectively;
- Figs. 12-21 A illustrate a time sequence of ad hoc network fonnation using a top-down propagation approach
- Fig.22 illustrates a step-power filtering routine utilized by a Wireless Reader Tag in accordance with the present invention
- Fig.23 illustrates in block diagram a Gateway making a WRT Broadcast to a plurality of
- Fig.24 illustrates in block diagram a preferred architecture of a WRT of Fig.23.
- Fig.25 illustrates in block diagram a preferred architecture of the WT component of the WRT of Fig.24.
- each asset to be tracked is tagged with a wireless transceiver (hereinafter referred to as a "Wireless Tag” or “WT”) and reading the Wireless Tag using another wireless transceiver (hereinafter referred to as a “Wireless Reader Tag” or "WRT").
- WT wireless transceiver
- WRT Wireless Reader Tag
- the Wireless Tag itself preferably is semi-passive, although a passive, active, or other type of Wireless Tag could be used within the scope of the present invention.
- the Wireless Reader Tag itself preferable is active.
- a passive transceiver such as an RFID tag, receives and transmits primarily using inductive energy.
- a semi-passive transceiver receives primarily using inductive energy and transmits using internally stored energy, such as a battery.
- An active transceiver receives and transmits using internally stored energy, such as a battery.
- the Wireless Tags are radio-frequency transponders ("RFTs")
- the Wireless Reader Tags are wireless transceivers generally comprising low-power radio frequency (“LPRF”) devices capable of transmitting and receiving data packets.
- a LPRF device refers generally to a two-way wireless radio-frequency data communication device that transmits data in packets, and is not limited to a particular signal strength or power consumption.
- Each Wireless Tag includes a unique identification (hereinafter “WT ID”) stored therein that uniquely identifies the Wireless Tag in transmissions made by the Wireless Tag and, likewise, each Wireless Reader Tag includes a unique identification (hereinafter “WRT ID”) stored therein that uniquely identifies the Wireless Reader Tag in transmissions made by the Wireless Reader Tag.
- WT ID unique identification
- WRT ID unique identification
- the Wireless Reader Tags preferably operate in accordance with standards based radios and especially with Bluetooth standards — an industry wide wireless radio specification.
- Bluetooth an industry wide wireless radio specification.
- the invention is not limited to use with Bluetooth technology, but can be used with any wireless transceiver having the capability to communicate directly with other wireless transceivers, such as wireless Ethernet transceivers, 802.11 , Home RF, and others.
- each Wireless Tag also includes, apart from its WT ID, a "class designation" representative of an attribute, characteristic, relation, or behavior of the asset (and not the Wireless Tag itself), and each Wireless Tag is said to belong to, or be a member of, a particular WT Class based on its class designation.
- Identification of the WT Class for which a particular Wireless Tag is designated preferably is stored on the Wireless Tag and is utilized by the Wireless Tag in screening broadcasts for determining whether to respond thereto with a transmission.
- the WT Class may represent any type of identification, as desired. For instance, a particular
- WT Class could represent a category of an asset, such as a ball (identified by /ball); a subcategory such as a soccer ball (identified by /soccer_ball); or a subcategory of the subcategory (a sub- subcategory), such as a size 5 soccer ball (identified by /size_5_soccer_ball).
- the WT Class may also represent the category or subcategory, respectively, abstracted from the subcategory or sub-category.
- a WT Class representing a sub-subcategory equal to /ball/soccer_ball/size_5_soccer_ball also inherently identifies a subcategory (soccer_ball) and a category (ball).
- the a WT Class may be intentionally limited to identification only of the sub-subcategory (/size_5_soccer_ball). If so limited, additional information inferred from this identification about the subcategory and/or category of such WT Class then may be maintained in memory on the Wireless Reader Tag (described below) or remotely in category dictionaries or category rule sets.
- each Wireless Tag When a broadcast or multicast is made to the Wireless Tags (hereinafter "WT Broadcast"), each Wireless Tag is capable of identifying a specified WT Class in the WT Broadcast and replying to the WT Broadcast with its own transmission when the specified WT Class matches its WT Class. If the WT Class does not match its class designation, then the Wireless Tag does not respond to the WT Broadcast and it makes no transmission.
- each Wireless Tag is a transponder that may be selectively activated.
- Semi-passive transceivers that are capable of being used to respond to targeted broadcasts in accordance with the present invention, and not to every broadcast received, are well known within the art and, accordingly, the specific design of such semi-passive transceivers forms no part of the present invention.
- Each Wireless Reader Tag also includes a class designation, and each Wireless Reader Tag is said to belong to, or be a member of, a WRT Class.
- each Wireless Reader Tag is associated with at least one WT Class for reading Wireless Tags that are members thereof.
- the Wireless Reader Tag communicates with (or "reads") those Wireless Tags having a WT Class with which it is associated by making a WT Broadcast specifying the WT Class in the transmission.
- the identification of associated WT Classes of a Wireless Reader Tag preferably is preprogrammed into the memory of, or otherwise maintained in, the Wireless Reader Tag.
- each Wireless Reader Tag includes a digital processor and memory for storing the WRT Class thereof and associated WT Classes, the members of which are to be read by the Wireless Reader Tag.
- a class adoption step also is utilized in which a WRT Class is adopted by a Wireless Reader Tag that is detected as being the WRT Class of a nearby Wireless Reader Tag, or that is associated with a detected WT Class of a nearby Wireless Tag.
- a WRT Class is adopted by a Wireless Reader Tag that is detected as being the WRT Class of a nearby Wireless Reader Tag, or that is associated with a detected WT Class of a nearby Wireless Tag.
- class adoption is performed only when the adopting Wireless Reader Tag is unable to participate in the ad hoc hierarchical network formation because of a missing or corrupted class designation.
- such a class adoption step may be useful even if the adopting Wireless Reader Tag has sufficient class designation information to support communication.
- a Wireless Reader Tag attached to a pallet could periodically update its class designation by detecting the WRT Classes of nearby Wireless Reader Tags and the corresponding WT Classes of nearby Wireless Tags (e.g., those attached to items placed on a pallet).
- a Wireless Reader Tag can be manually programmed with a class designation by use of a handheld communicator (hereinafter "Communicator").
- the Communicator is a sort of remote control device that allows a human operator to program Wireless Reader Tags and to query Wireless Tags.
- the Communicator includes a LPRF device that is controlled by application software designed to facilitate manual human interaction and communication with nearby Wireless Reader Tags and Wireless Tags.
- the Communicator comprises a PDA, such as those available from Palm Corp., that is appropriately configured for use with the present invention.
- a Wireless Reader Tag In reading Wireless Tags, a Wireless Reader Tag is capable of communicating with a limited number of Wireless Tags at any given time. Accordingly, if a large number of Wireless Tags are to be read by a particular Wireless Reader Tag, the Wireless Tags are read using a step-power filtering routine in accordance with the present invention. In this regard, a Wireless Reader Tag is capable of transmitting at different power levels. By transmitting a different consecutive power levels, a Wireless Reader Tag may read a large number of Wireless Tags that otherwise would not be read due to RF interference.
- a Wireless Reader Tag "M” is shown spaced at different distances to Wireless Tags S ⁇ ,S 2 ,S 3 ,S .
- the Wireless Reader Tag broadcasts at a first power level 10 a transmission specifying the WT Class of all of the illustrated Wireless Tags S.
- the broadcast is received by the closest three Wireless Tags shown within the inner circle 1010, which represents the effective transmission range of the Wireless Reader Tag at the first power level.
- the broadcast includes, inter alia, a command to ignore subsequent transmission specifying the same WT Class within a predeteimined time period thereafter.
- the Wireless Tags receiving this transmission then respond appropriately and power down for the predetermined time period.
- the Wireless Reader Tag broadcasts at a second, stronger power level 20 a transmission specifying the same WT Class.
- the broadcast is received by the closest six Wireless Tags shown within the inner circle 2020, which represents the effective transmission range of the Wireless Reader Tag at the second power level.
- the broadcast includes, inter alia, a command to ignore subsequent transmission specifying the same WT Class within a predetermined time period thereafter.
- the three outermost Wireless Tags S 2 receive this transmission, respond appropriately, and then power down for the predete ⁇ nined time period.
- the innermost Wireless Tags Si do not respond, as each has previously been instructed to ignore this subsequent transmission.
- the Wireless Reader Tag next broadcasts at a third, stronger power level 30 a transmission specifying the same WT Class.
- the broadcast is received by the closest eleven Wireless Tags shown within the inner circle 3030, which represents the effective transmission range of the Wireless Reader Tag at the third power level.
- the broadcast includes, inter alia, a command to ignore subsequent transmission specifying the same WT Class within a predeten ined time period thereafter.
- the five outermost Wireless Tags S 3 receive this transmission, respond appropriately, and then power down for the predetermined time period.
- the innermost Wireless Tags S-,S 2 do not respond, as each has previously been instructed to ignore this subsequent transmission.
- the Wireless Reader Tag next broadcasts at a fourth, yet stronger power level 40 a transmission specifying the same WT Class.
- the broadcast is received by all Wireless Tags shown within the inner circle 4040, which represents the effective transmission range of the Wireless Reader Tag at the fourth power level.
- the broadcast includes, inter alia, a command to ignore subsequent transmission specifying the same WT Class within a predetennined time period thereafter.
- the four outermost Wireless Tags S 4 receive this transmission, respond appropriately, and then power down for the predetermined time period.
- the innermost Wireless Tags S ⁇ ,S 2 ,S 3 do not respond, as each has previously been instructed to ignore this subsequent transmission.
- the power level of the broadcast is included in the transmission.
- each Wireless Tag receives the broadcast, the power level is noted and a range thereof is used with the WT Class for prescreening of further transmissions.
- a range thereof is used with the WT Class for prescreening of further transmissions.
- only those transmissions falling within the predetermined range about the power level of the broadcast are received and processed by the particular Wireless Tags.
- a "reset" command is broadcast to all of the Wireless Tags in order to enable receipt thereafter of a broadcast at any power level, or alternatively, the power level screening is dropped after a predetermined time period.
- the WRT class designations primarily are used by Wireless Reader Tag to screen each broadcast or multicast intended for receipt by a particular class of Wireless Reader Tags (hereinafter "WRT Broadcast").
- WRT Broadcast a command, query, or the like (generically referred to as a message) is communicated in a fransmission to members of a WRT Class in a WRT Broadcast as part of a data packet that begins with a preamble including an identification of the WRT Class intended as the target of the broadcast.
- Other information may also be included in the data packet for screening purposes by each Wireless Reader Tag.
- Wireless Reader Tags within range of the WRT Broadcast awake from a standby mode to receive the data packet, but only process the message therein with possible transmissions in response thereto when the WRT Class of the preamble matches the WRT Class of the Wireless Reader Tag (and when the other screening information, if present, also is matched). If there is no match, then the particular Wireless Reader Tag does not process the message, drops the data packet, and returns to standby mode.
- a Wireless Reader Tag or a Wireless Tag also may store in memory additional information such as: sensor derived information (e.g., temperature, humidity, altitude, pressure); a priority designation to provide improved response to selected broadcasts; a privilege level (e.g., “visitor,” “employee,” “manager,” “administrator,” and “super user”); time-sensitive information (e.g., synchronization timing, real-time sensor data, and GPS data); a characteristic of the particular tagged asset (e.g., serial number, status, process step, physical location, color, size, density); and/or a behavior of the tagged asset (e.g., temperature sensitivity, light sensitivity, shelf life).
- sensor derived information e.g., temperature, humidity, altitude, pressure
- a priority designation to provide improved response to selected broadcasts
- a privilege level e.g., "visitor,” “employee,” “manager,” “administrator,” and “super user”
- time-sensitive information e.g
- a Wireless Reader Tag also may store a WRT rank in a hierarchical ad hoc network formed by the Wireless Reader Tags (e.g., "primary” or “master,” “secondary” or “slave,” “sub-primary,” “tertiary”); and/or an identification of the WT Class for which a particular Wireless Tag is designated, indexed by WT ID for the particular Wireless Tag, especially if the Wireless Tag can store only the WT ID (e.g., when the Wireless Tag is passive).
- a WRT rank in a hierarchical ad hoc network formed by the Wireless Reader Tags (e.g., "primary” or “master,” “secondary” or “slave,” “sub-primary,” “tertiary”); and/or an identification of the WT Class for which a particular Wireless Tag is designated, indexed by WT ID for the particular Wireless Tag, especially if the Wireless Tag can store only the WT ID (e.g., when the Wireless Tag is passive).
- the preferred WRT architecture significantly prolongs the useful life of a WRT.
- Fig. 23 illustrates in block diagram a Gateway 5000 making a WRT broadcast 5002 to a plurality of WRTs 5008 in accordance with the present invention.
- the Gateway 5000 represents the juncture between the networks formed by the WRTs 5008 and an external network, such as the Internet.
- the Gateway 5000 is the Network Interface Module ("NIM") in Fig. 23 providing the wireless interface into the radio network of and controlling the messaging to the WRTs 5008.
- the Gateway 5000 preferably includes software allowing it make broadcasts to and communicate with the WRTs 5008.
- the Gateway 5000 preferably sends out a low frequency message in the band of the LPRF communications component 5010 of the WRTs 5008 (described in detail below).
- the message m(t) preferably is modulated on a carrier frequency, and the m(t) is likely to have a bias (k) due to the other radio communications in the same band.
- the m(t) will significantly reduce false turn on and provide the mechanism to wake the radios based on an object identifier, name, or classification (as described in detail below, once the WT component in the WRT receives the proper message from the Gateway, the WT component "wakes up" the LPRF communications component in the WRT).
- the Gateway 5000 In forwarding communications between the external network and the radio network of the WRTs 5008, the Gateway 5000 translates a radio link protocol to Ethernet, PSTN (Public Switched Telephone Network), Mobile Phones (including GSM, TDMA, CDMA, PDC, AMPS, Ricochet, etc.) and other data communications networks that allows the information to be transferred to a database on the Internet or an Intranet.
- PSTN Public Switched Telephone Network
- Mobile Phones including GSM, TDMA, CDMA, PDC, AMPS, Ricochet, etc.
- the Gateway 5000 thus serves an external network communications function, providing the WRTs 5008 with an avenue for communication to external devices connected to the Internet.
- the Gateway 5000 itself preferably includes a network card component 5004 for interfacing with the external network using the appropriate protocols and a WRT component 5006 for communicating with the WRTs 5008 using the appropriate protocols.
- the WRT component 5006 interfaces to the network card 5004, and the WRT component 5006 preferably comprises a LPRF communications component, such as a class 1 Bluetooth radio, for communicating directly with the LPRF communications component of each WRT 5008, as described in greater detail below.
- the WRT component 5006 may further include a receiver circuit for performing the "tag turn-on" function of the present invention, in which case the Gateway 5000 may power off when not in use and be awaken by an appropriate broadcast when communication by way of the Gateway 5000 is desired.
- Each WRT 5008 shown in Fig. 23 preferably is an active transceiver and includes several components. Specifically, with reference to Fig. 24, each of the WRTs 5008 includes a LPRF commumcations component 5010, a reader component 5012 physically connected to the LPRF communications component 5010 for data exchange therebetween, and a WT component 5014 physically connected to an "activation" input of the LPRF communications component 5010 for performing the "tag turn-on" function of the present invention.. These components are hardwired into the WRT housing 5016 of the WRT 5008.
- the WT component 5014 is physically connected to the activation input of the LPRF communications component 5010 by line 5018, and the reader component 5012 is physically connected to the LPRF communications component 5010 by line 5020.
- Each WRT 5008 also includes an energy source, such as a battery (not shown), as well as an antenna (not shown).
- the reader component 5012 preferably is connected to the LPRF communications component 5010 through a serial port of the LPRF communications component 5010. Furthermore, the reader component 5012 preferably comprises an RFID tag reader for reading WTs that comprise RFID tags. However, in alternative preferred embodiments, if the WTs to be read comprise standards based radios, such as class 1 or class 2 Bluetooth radios, then the LPRF communications component 5010 itself is capable of communicating directly with the WTs, and the reader component 5012 need not even be included in the WRT 5008.
- standards based radios such as class 1 or class 2 Bluetooth radios
- the WT component 5014 itself, like the WRT 5008, includes several components. As shown in Fig. 25, these components include a radio frequency (RF) detector component 5022, an application-specific integrated circuit (ASIC) component 5024, and a memory component 5026.
- the WT component 5014 also includes an energy source, such as a battery 5026, as well as an antenna 5028.
- the antenna 5028 of the WT component 5014 and/or the battery 5026 of the WT component 5028 may be shared with the LPRF communications component 5008. Alternatively, the antenna 5028 and/or the battery 5026 may be independent from that of the LPRF communications component 5008.
- a WRT may include an external network communications component physically connected to the LPRF communications component for data exchange therebetween.
- the NIM may comprise a satellite transceiver and/or a cellular transceiver
- the LPRF communications component preferably includes a port for interfacing with the satellite transceiver and/or cellular transceiver. If the WRT includes an external communications component, then the WRT may directly communicate with an external network without relaying communications through the Gateway.
- the WRT additionally, or alternatively, may include a sensor component physically connected to the LPRF communications component by way of an appropriate port for data exchange therebetween.
- the sensor component may include a motion detector; a digital camera; a microphone; a temperature gauge; a thermistor; a vibration sensor; and/or a global positioning system (GPS) receiver.
- GPS global positioning system
- the LPRF communications component 5010 communicates with the reader component 5012 in reading WTs located within the vicinity of the WRT 5008, and the LPRF communications component 5010 receives and transmits data to other WRTs 5008 or to a Gateway 5000 (specifically, the WRT component 5006 of the Gateway 5000). Furthermore, the LPRF communications component 5010 preferably is programmed to power down to an "off state in order to conserve battery power when the LPRF communications component 5010 no longer is actively transmitting or receiving data packets.
- the LPRF communications component 5010 also may be capable of powering power down to a standby mode, in which case the LPRF communications component 5010 preferably includes a timer circuit or other microprocessor that automatically controls powering up after a predeterrnined period of time has elapsed since powering down to the standby mode.
- the WT component 5014 physically connected to the activation input of the LPRF communications component 5010 provides the electronic signal for waking up, i.e., activating, the LPRF communications component 5010.
- the WT component 5014 generates this electronic signal by toggling the line 5018 that runs from the WT component 5014 to the LPRF communications component 5010 in response to receipt by the WT component 5014 of a radio frequency broadcast.
- the radio frequency broadcast to which the WT component 5014 responds is a "targeted" broadcast.
- the broadcast preferably includes in a preamble thereof one or more target identifications.
- the targeted broadcast that awakens a particular WRT may originate from a Gateway, such as Gateway 5000 of Fig. 23.
- the targeted broadcast may also originate from or be rebroadcast by the LPRF communications component of another WRT 5008.
- the WT component 5014 preferably stores (in read only or read/write memory) an identification in its memory component 5026 and/or pennanently stores an identification in tire integrated circuits of its ASIC component 5024, and when a broadcast is received, the WT component 5014 screens or filters the broadcast to determine if the target identification in the broadcast matches the identification stored in the WT component 5014. If there is no match, the WT component 5014 does not awaken the LPRF communications component 5010 and continues to await a broadcast containing a matching identification.
- a match results in the WT component 5014 generating the electrical signal by toggling the line 5018, which awakens the LPRF communications component 5010.
- the WT component 5014 responds to a radio frequency broadcast in this manner preferably only if the radio frequency broadcast includes a target identification matching its stored identification.
- the stored identification itself may uniquely identify its WRT or, alternatively, the identification may represent a WRT class or a WT class.
- the identification also may represent a selected plurality of WRTs such that specific WRTs respond out of the total possible WRTs that otherwise could respond.
- the WT component need only comprise at a minimum a "receiver" circuit, as the WT component need only receive incident RF energy and be capable of responding by providing the electronic signal to wake up the LPRF communications component.
- a receiver circuit is common, and is found, for example, in the simple and inexpensive Frequency-Shift-Key (FSK) radios, Phase-Modulated (PM) radios, and Amplitude- Modulated (AM) radios.
- FSK Frequency-Shift-Key
- PM Phase-Modulated
- AM Amplitude- Modulated
- the WT component could comprise a simple RFID tag modified to provide the wake up signal to the LPRF communications component.
- a wireless tag in standard operation "chirps" in response to receipt of incident RF energy, and the RFID tag would only need to be modified in order to channel the energy otherwise used for the "chirp" to the input of the LPRF communications component in order to wake it up.
- the present invention thus provides a method of using "wireless tag technology" (i.e., the receiver circuit of wireless tags) to wake the LPRF communications component when communication needs to commence.
- a characteristic of a wireless transceiver of the present invention includes two receivers and at least one transmitter.
- a receiver and transmitter pair is included in the LPRF communications component, and a second receiver is included in the WT component.
- the range at which the second receiver is capable of detecting transmissions is at least approximately commensurate with the range at which the transmitter is capable of sending transmissions.
- the LPRF communications component which preferably comprises a Bluetooth radio, draws on the order of approximately 40 mA of current when awaiting receipt of a radio frequency broadcast and draws on the order of approximately 10 mA of current when powered down to a standby mode.
- the LPRF communication component draws approximately no current when powered down to an off state.
- the WT component comprises at least a receiver circuit that only draws on the order of approximately 10 to 15 ⁇ A of current while awaiting receipt of the radio frequency broadcast. Consequently, with the LPRF communications component powered off, the WRT overall draws only on the order of approximately 10-15 ⁇ A of current attributable to the WT component while awaiting receipt of the radio frequency broadcast.
- the LPRF communications component would not power down to the off state between time periods of actively receiving and transmitting but, instead, only would power down to standby mode and, thus, the WRT overall would draw on the order of approximately 10 mA of current. Consequently, by providing the WT component as part of the WRT, the LPRF communications component may power down to the off state such that the current requirement of the WRT is reduced three orders of magnitude, i.e., from milliamps to microamps.
- WRTs of the present invention preferably are utilized in sensor information collecting and/or asset-tracking applications, and methods for fo ⁇ rring ad hoc networks by these WRTs will now be described in detail.
- the radio frequency utilized by the WRTs preferably is 2.4 GHz, for which no license is required in any country.
- the WRTs preferably read wireless tags that, themselves, are associated with the assets to be tracked.
- the WRTs also serve the wireless tag function, with each WRT being associated with an asset to be tracked.
- a reader component of the WRT may be omitted if no wireless tag is to be read by the WRT.
- each of the Wireless Reader Tags also includes a class based network formation (CBNF) routine that enables the Wireless Reader Tags to coordinate with one another in collectively forming hierarchical ad hoc networks, each network being defined by Wireless Reader Tags of a common WRT Class (hereinafter "Class Based Network").
- the CBNF routine is executed upon startup of the Wireless Reader Tag, on specific command broadcast to the Wireless Reader Tag, or as otherwise needed (such as to maintain an ad hoc network).
- the CBNF routine is implemented in software operable on the digital processor of each Wireless Reader Tag in the preferred embodiments. Alternatively, the CBNF routine is implemented in other ways, such as hardwired logic circuitry in each of the Wireless Reader Tags.
- each Class Based Network is a hierarchical network that provides an efficient topology for selective communication among Wireless Reader Tags of the same WRT Class.
- WRT Broadcasts are made by a network interface module (hereinafter "Gateway") that serves as a communication link between the ad hoc hierarchical networks established by the Wireless Reader Tags and an external network, such as a local area network (LAN), wide area network (WAN), or the Internet.
- the Gateway includes at least a network interface and an RF interface for communication with Wireless Reader Tags of the ad hoc networks.
- An asset-tracking application server or equivalent computer system is connected with the external network and obtains through the ad hoc networks information on the tagged assets for compilation, analysis, and/or display.
- Communication between the Gateway and a Wireless Reader Tag of the highest hierarchical level in each Class Based Network may be established utilizing step-power filtering technique if a number of Class Based Networks otherwise exceeds the multiple channel communication capabilities of the Gateway.
- the Gateway is enabled to selectively communicate with such Wireless Reader Tags based on physical distance from the Gateway.
- a Wireless Reader Tag or a Wireless Tag stores in memory not only a WRT ID or WT ID, respectively, but also may store additional information such as, for example: class designation; sensor derived information; a priority designation to provide improved response to selected broadcasts; a privilege level; time-sensitive information; a characteristic of the particular tagged asset; and/or a behavior of the tagged asset.
- This stored information becomes accessible by the asset-tracking application server through the Classed Based Networks.
- the asset-tracking application server also can obtain the WRT ID associated with each WT ID for intelligence gathering purposes.
- FIG. 1 a preferred embodiment of the present invention is illustrated in a shipping environment 100 including a warehouse 104.
- a Wireless Reader Tag 110 (also represented by "LPRF” in the drawings) is attached to each pallet 120 in the shipping environment 100.
- An actual implementation would involve thousands of pallets and LPRFs; however, for clarity only three pallets 120 and Wireless Reader Tags 110 are shown in Fig. 1.
- Assets 134 on the pallets 120 each are tagged with a Wireless Tag 130 (also represented by "RFT" in the drawings).
- Each Wireless Reader Tag 110 preferably is active, while each Wireless Tag 130 preferably is semi-passive.
- passive Wireless Tags 110 and Wireless Reader Tags 130 are devices that collect RF energy inductively and selectively respond, including sending information that is stored thereon.
- Semi-passive and semi-active Wireless Tags 110 and Wireless Reader Tags 130 are devices that use internal energy, in the form of a battery, to power some portion of the circuit to either detect a transmission or make a fransmission.
- Active Wireless Tags 110 and Wireless Reader Tags 130 are devices that use internal power, in the form of a battery, to both detect and make transmissions.
- both Wireless Tags 130 and Wireless Reader Tag 110 are read-write devices, but the Wireless Tags 130 may be read-only (generally characteristic of passive devices) within the scope of the present invention.
- a Gateway 140 represents a communication link between an external network (LAN) 150 and Class Based Networks formed by the Wireless Reader Tags 110.
- the Gateway 140 is an external network access transceiver that comprises a radio base station directly or indirectly connected to a wired network (e.g., using Ethernet, or wireless Ethernet).
- the radio base station portion of Gateway 140 is an LPRF-compatible module that communicates with Wireless Reader Tags 110 of the Class Based Networks.
- the Gateway 140 links the Class Based Network of the present invention with conventional network topologies that use conventional network protocols.
- the Gateway 140 thereby facilitates monitoring, controlling, and querying Wireless Reader Tags 110 and Wireless Tags 130 in the Class Based Networks using application software running on a server computer 160 connected to the external network 150.
- the server 160 may be operated on a general purpose computer, such as a personal computer, minicomputer, or mainframe.
- a system in accordance with the present invention may include components in addition to those described above.
- a Communicator 170 also represented by "HIM” in the drawings
- a mobile locating Gateway 180 also represented by “MLG” in the drawings
- Communicator 170 is used to manually read class designations from network entities, such as Wireless Reader Tag 110 and Wireless Tags 130, and to assign class designations.
- Gateway 180 which is installed in shipping vehicle 184, has the core capabilities of a Wireless Reader Tag and a Gateway, plus at least two additional features.
- Gateway 180 includes a GPS receiver (not depicted) for determining geographic location of shipping vehicle 184 and a mobile interface such as a cellular or satellite transmitter 186 for transmitting data to server computer 160 via a mobile phone network 188.
- the Communicator 170 and Gateway 140,180 each include a Wireless Reader Tag incorporated therein.
- Gateway 140,180 and Communicator 170 each includes the core hardware and software of a Wireless Reader Tag, each can actively participate in the formation, control, and maintenance of the Class Based Networks.
- the CBNF routines of multiple Wireless Reader Tags cooperate to propagate a distinct hierarchical network among each of multiple WRT Classes of the Wireless Reader Tags.
- the WRT Class for each Wireless Reader Tag is stored in memory and included in the preamble of each network formation communication generated by the Wireless Reader Tag.
- the WRT Class may be identified by any series of codes or characters, the interpretation of which should be standardized and used by all possible recipients of network formation communications (including all Wireless Reader Tags 110, Gateways 140,180, and Communicator 170).
- a WRT Class may include a category/subcategory list such as "/Wal-Mart/Shipment_123", or a linked list representing relationships of various categories and subcategories defined in a profile of the Wireless Reader Tag.
- the WT Classes of Wireless Tags associated with a Wireless Reader Tag of the WRT Class "/Wal-Mart/Store_290/Shipment_123” could include "/Televisions/32in” and “/Televisions/27in”, representing 32 inch televisions and televisions 27 inch televisions on a pallet (to which the Wireless Reader Tag is attached) that is scheduled for inclusion with shipment number 123 to Wal-Mart store number 290.
- Wireless Reader Tags 110 are not preprogrammed in non-volatile read/write memory with a WRT Class designation, a Wireless Reader Tag 110 may acquire a class designation by reading Wireless Reader Tags 110 or Wireless Tags 130 nearest to it, and then store the class designation and other profile information in non-volatile read/write memory.
- a pallet 120 is moved onto shipping vehicle 184, the pallet's Wireless Reader Tag 110 migrates to join a Class Based Network headed by Gateway 180. Gateway 180 is then able to report the migration to server 160 via a network link that it has formed with Gateway 140.
- the CBNF routines of multiple Wireless Reader Tags cooperate to propagate a distinct hierarchical network among each of multiple WRT Classes of the Wireless Reader Tags.
- the WRT Class for each Wireless Reader Tag is stored in memory and included in the preamble of each network formation communication generated by the Wireless Reader Tag.
- the WRT Class may be identified by any series of codes or characters, the interpretation of which should be standardized and used by all possible recipients of network formation communications (including all Wireless Reader Tags 110, Gateways 140,180, and Communicator 170).
- a WRT Class may include a category/subcategory list such as "/Wal-Mart/Shipment_123", or a linked list representing relationships of various categories and subcategories defined in a profile of the Wireless Reader Tag.
- the WT Classes of Wireless Tags associated with a Wireless Reader Tag of the WRT Class "/Wal-Mart/Store_290/Shipment_123” could include "/Televisions/32in” and “/Televisions/27in”, representing 32 inch televisions and televisions 27 inch televisions on a pallet (to which the Wireless Reader Tag is attached) that is scheduled for inclusion with shipment number 123 to Wal-Mart store number 290.
- Wireless Reader Tags 110 may acquire a class designation by reading Wireless Reader Tags 110 or Wireless Tags 130 nearest to it, and then store the class designation and other profile information in non-volatile read/write memory.
- a WRT can acquire or "adopt" a class designation from a surrounding WRT or WT when that function is provided for in the "profile" of the WRT.
- a "profile" of a WRT includes a list of attributes that invoke operating system functions, and can include information such as "adopted class.” If, for example, a WRT that is in a manufacturing area moves past a physical boundary that puts it within a shipping area, then the WRT automatically adopts a shipping class for its previous manufacturing class.
- the class designations may look like this: When in Manufacturing: /Sony/TV/24" anufac1x ⁇ ring-Finishing Serial #lO
- Gateway 180 migrates to join a Class Based Network headed by Gateway 180.
- Gateway 180 then is able to report the migration to application server 160 via a network link that it has formed with Gateway 140.
- the WRT Class may also include other information concerning a status, characteristic, or privilege of the Wireless Reader Tag, the network, or other conditions. Virtually any profile information can be included in the preamble and combined with class designation information to be used for network formation. Furthermore, the preamble information can be represented in any convenient format, including various encoding schemes. In one embodiment, a Walsh code is assigned to each class definition and provided to Wireless Reader Tags of the class.
- Walsh codes are well understood in the field of digital wireless communications and, therefore, require only a brief explanation here. Walsh codes are used to encode data packets and to designate the class of Wireless Reader Tags that are enabled to receive and decode a particular packet of data. The association of Walsh codes with class designation information facilitates reduced battery consumption in Wireless Reader Tags by utilizing targeting methods requiring very little processing power. The use of Walsh codes also improves data security by encoding of such communications. Those skilled in the art will recognize that many other methods may be used for encoding class designation information in the preamble of data packets to facilitate class based network formation and network formation communications while reducing battery consumption and RF interference.
- Fig. 2 is a flowchart illustrating a preferred operation of the CBNF routine in accordance with the present invention to form a Class Based Network.
- a first Wireless Reader Tag of a predetermined WRT Class initially listens (Step 210) for transmissions of other Wireless Reader Tags of the same WRT Class, which would indicate the presence of a Class Based Network for such WRT Class. If such a Class Based Network is detected, then the first Wireless Reader Tag attempts to join (Step 220) the Class Based Network as a "secondary" unit by issuing a registration request signal. Otherwise, if no Class Based Network is detected, then the first Wireless Reader Tag attempts join the overall network by establishing such a Class Based Network as a "primary" unit.
- Step 230 transmitting (Step 230) a "primary_ready" signal to all other Wireless Reader Tags of the same WRT Class within the broadcast range of the first Wireless Reader Tag.
- the first Wireless Reader Tag then listens (Step 240) for replies from other Wireless Reader Tags attempting to register as secondary units in the new Class Based Network.
- the WRT Class is abstracted (Step 250) by truncating the class designation. For example, if the initial WRT Class is "/Wal-Mart/Store_290/Shipment_123", then the class designation is abstracted to "/Wal-Mart/Store_290". The process then repeats starting at Step 210 for this abstracted class designation as the new WRT Class for the first Wireless Reader Tag. If this process continues to repeat, the class designation will not be able to be abstracted further without otherwise being generic to all classes of Wireless Reader Tags, i.e., WRT Class being "/".
- the first Wireless Reader Tag attempts to connect (Step 294) to a Gateway ("NIM” in Fig. 2) and register as a member of the WRT Class that is the highest abstraction possible without being generic to all Wireless Reader Tags (i.e., as a member of the root class "/Wal-Mart").
- NIM Gateway
- the first Wireless Reader Tag Upon successful registration with the Gateway, the first Wireless Reader Tag then enters (Step 296) sleep — or standby — mode to conserve battery power.
- the first Wireless Reader Tag registers (Step 260) the secondary unit and repeats the registration for each reply from other secondary units until a determination is made (Step 270) or until no more such replies are detected.
- a "cluster" in this context comprises a primary unit and the secondary units with which the primary communicates directly, and may be limited in number of units by the number of communication channels that can be supported by the primary unit operating as a cluster head. Once a cluster is full, the first unit (cluster head) responds to the next secondary unit attempting to register by promoting (Step 280) it to the status of a primary unit.
- the first Wireless Reader Tag now the cluster head of the full cluster — then attempts to register (Step 290) with the newly promoted primary unit as one of its secondary units.
- the new primary unit in turn, then is available to serve as a cluster head for other Wireless Reader Tags, to promote other Wireless Reader Tags to higher level primary units, and so forth, thereby propagating a hierarchical Class Based Network from the "bottom-up.”
- the first Wireless Reader Tag and the other Wireless Reader Tags form the Class Based Network using the same CBNF routine.
- Step 270 if the cluster of the first Wireless Reader Tag does not completely fill, if no more first Wireless Reader Tags attempt to register as secondary units, and if the first Wireless Reader Tag has a class designation that is other than its root class, then the first Wireless Reader Tags abstracts its WRT Class (Step 250) by truncating the class designation and starts over the entire CBNF routine beginning at Step 210 (i.e., listening for the presence of Wireless Reader Tags of the truncated class at Step 210, etc.). Note that in accordance with preferred embodiments of the present invention, a Wireless Tag or Wireless Reader Tag will respond if its class is identified in a communication, even if the class in the communication is abstracted.
- a Wireless Tag or a Wireless Reader Tag having a class designation of "/sony/tv/color/24" will respond to a communication identifying the class as "/sony/tv” as its class (i.e., its abstracted class) is identified in the communication.
- the first Wireless Reader Tag attempts to register (Step 294) with the Gateway and, thereafter, enters (Step 296) into an idle mode.
- the first Wireless Reader Tag may start attempting to register with the Gateway soon after it becomes a primary at Step 230 or concurrently with filling its cluster at Step 270.
- the first Wireless Reader Tag would also pass to the promoted Wireless Reader Tag the responsibility for connecting with the Gateway on behalf of the cluster, if possible.
- the Gateway will be able to communicate with seven other WRTs simultaneously.
- the targeted WRT Class can revolve on each channel as a function of time in order to address multiple WRT Classes on the single channel.
- the system may establish a revolving communication schedule with revolving class addressing that allows the Gateway to communicate with hundreds or thousands of WRT Classes on the channel. Synchronization between the Gateway and Wireless Reader Tags is important for proper operation of revolving class addressing and to minimize battery consumption. Accordingly, as WRT
- Classes are added to the overall network and establish communication with a Gateway, the Gateway may synchronize, reconfigure, and optimize the WRT Class' schedule for revolving class addressing.
- the Class Based Networks also are reconf ⁇ gurable in response to changes in the location, status, behavior, characteristics or class designation associated with the Wireless Reader Tags.
- assets of a class e.g., in-production
- a new class e.g., shipping
- Class Based Networks also facilitate the use of asset-tracking applications and process flow controls to track and manage the assets based on real-world requirements, such as manufacturing requirements, shipment, warehouse management, zone control, environmental impacts, etc.
- Class Based Networks also facilitate automated segregation and delivery of assets.
- a cluster head when a cluster is filled the secondary units that have already registered with the first Wireless Reader Tag (the cluster head) may be promoted to assume the role of middle-hierarchy primary units, called “sub-primaries.” Sub- primaries, which continue as secondary units below the first Wireless Reader Tag (cluster head), then provide connectivity for any additional Wireless Reader Tags that are attempting to join the Class Based Network in clusters headed by the sub-primaries.
- Figs. 3-11 depict Wireless Reader Tags in a time-sequence of events showing a bottom-up method of the CBNF routine.
- Wireless Reader Tags A-G are members of WRT Classes "circle” and “triangle,” respectively, which are arbitrary class designations assigned for purposes of illustration only.
- the Wireless Reader Tags 1-6 and Wireless Reader Tags A-G operate on up to three communication channels and one general channel (also called the control channel).
- the Wireless Reader Tags all include CBNF routines operating in accordance with the method shown in Fig.2.
- the CBNF routine of each Wireless Reader Tags 1-6 and Wireless Reader Tags A-G is configured to initially listen for a communication having a data packet with a preamble that identifies a Wireless Reader Tag of the same WRT Class as the Wireless Reader Tag executing the CBNF routine (see Fig. 2, Step 210).
- the preamble of each packet is represented by a colon- separated string of information, as follows:
- Target Class is the WRT Class of Wireless Reader Tags directed to wake up from standby to receive and process the data packet.
- the Target Class is either "/circle” or “/triangle” (there are no subcategories in this example).
- the Target Class designation could include subcategory information in a slash-separated list, in a linked list, with Walsh codes, or by any other method of representing category and subcategory information.
- the "My Profile" section of the preamble identifies the Wireless Reader Tag transmitting the communication by WRT Class and WRT ID unique to the Wireless Reader Tag.
- the "Action Requested" includes the message, and the "Target Cluster Head ID" identifies the Wireless Reader Tag of the cluster head or proposed cluster head, if any.
- Wireless Reader Tag 1 After listening for data packets of its WRT Class (i.e., /circle) and detecting none, Wireless Reader Tag 1 attempts to start a Class Based Network for the WRT Class of "/circle" as a primary unit by transmitting a data packet having the following preamble: : /circle : /circle/unitl : primary_ready : no_primary
- the class designation "/circle” causes only Wireless Reader Tags of the WRT Class “/circle” to receive and process the message of the data packet.
- Wireless Reader Tag 1 if it receives no replies, may retransmit the communication multiple times before timing out and beginning a beacon procedure or entering a battery-saving lost mode.
- the data packets (and others described below) may encapsulate a data payload or may have a null payload.
- Wireless Reader Tags are preferably synchronized to allow scheduled communication to a particular WRT Class at regular intervals.
- the Wireless Reader Tag transmits a data packet at a time precisely synchronized with the targeted WRT Class.
- the receiving members of the WRT Class only power up to listen at each such interval and only for very small periods of time (e.g., a few milliseconds) when data packet for such WRT Class would nonnally be transmitted.
- the intervals at which a Wireless Reader Tag listens for communications directed to its WRT Class is called the duty cycle, which can be dynamically adjusted to respond to network communication demands while minimizing battery consumption.
- a period of inactivity may prompt a Wireless Reader Tag to limit its duty cycle to intervals of minutes or hours.
- a Wireless Reader Tag may ping (transmit) to determine whether other Wireless Reader Tags are still alive and available for communication. Assuming that no network changes have occurred, the Wireless Reader Tag goes back to sleep until the next duty cycle. Network changes may cause all or a part of a Class Based Network to reconfigure.
- Wireless Reader Tags of WRT Class "/circle” within range of Wireless Reader Tag 1 respond with a registration request signal, as listed in Table 1 below:
- the transmitters of Wireless Reader Tags 2-6 would preferably include conventional collision avoidance routines to avoid interfering transmissions of the registration request packets, as set forth by the Bluetooth specifications.
- Wireless Reader Tag 1 in response to receipt at Wireless Reader Tag 1 of the registration_request signals from Wireless Reader Tags 2-6, the CBNF routine of Wireless Reader Tag 1 registers and acknowledges the secondary Wireless Reader Tags to form a cluster, hi this example, Wireless Reader Tag 1 has a maximum cluster capacity of three secondary units. Consequently, it only registers and acknowledges the three Wireless Reader Tags from which the strongest registration request signals are received which, in this example, are Wireless Reader Tags 2- 4.
- the CBNF routine By registering and aclcnowledging secondary units on the basis of signal strength, rather than on a first-come-first-served basis or some other basis, the CBNF routine establishes a cluster that is energy efficient for communication within the cluster. To acknowledge registration of the secondary units, Wireless Reader Tag 1 transmits an acknowledgement signal to the Wireless Reader Tags 2-4, as set forth in Table 2 below: Table 2
- the network topology is now shown in Figs. 6 and the cluster hierarchy is depicted in Fig. 6A.
- the two concentric circles of Wireless Reader Tag 1 indicate that it is a cluster head at Level 2 in the network hierarchy.
- Wireless Reader Tag 1 (the cluster head) selects from the other Wireless Reader Tags attempting to register the unit having the strongest registration request signal (in this example Wireless Reader Tag 5) and directs such unit to become a new primary unit.
- the new primary unit then serves as a new cluster head for a cluster in which Wireless Reader Tag 1 becomes a secondary unit (thus the "bottom-up" description of the method).
- the command from Wireless Reader Tag 1 to Wireless Reader Tag 5 is: : /circle/unit5 : /circle/unitl : promote_and_request_primary : no_primary
- Wireless Reader Tag 5 acknowledges the promotion signal from Wireless Reader Tag 1 and begins to propagate the Class Based Network at the next higher level in the hierarchy, which now has three levels as depicted in Fig. 8A. In acknowledging its promotion and registration as a primary to Wireless Reader Tag 1, Wireless Reader Tag 5 transmits its acknowledgement packet to all units of its class within range, by the following preamble:
- Wireless Reader Tag 5 By transmitting to all units of its WRT Class within range, Wireless Reader Tag 5 efficiently registers with Wireless Reader Tag 1 and concurrently shares primary status information with all Wireless Reader Tags of its WRT Class within its broadcast range (which is different from the broadcast range of Wireless Reader Tag 1). The three concentric circles around Wireless Reader Tag 5 indicate that it is a primary in the third-level of the hierarchy of the Class Based Network.
- Wireless Reader Tag 6 upon receiving Wireless Reader Tag 5's registration acknowledgement (Fig. 8), requests to register as a secondary unit to Wireless Reader Tag 5 by sending a packet with the following preamble:
- unit 5 responds with:
- a Class Based Network for the WRT Class "/triangle" is similarly formed by Wireless Reader Tags A-G concurrently with the steps shown in Figs. 3-9, whereby two distinct hierarchal Class Based Networks result as shown in Fig. 10A.
- Fig. 11 if a Gateway is available, the highest level primary units (Wireless
- Reader Tags 5 and A in this example register with the Gateway to establish connectivity to an external network mcluding an application server (no shown) communicating therewith.
- Figs. 12-21 illustrate another preferred top-down CBNF routine in which the Wireless Reader Tags transmit a series of network formation communications in the course of self-organizing a hierarchical network, the topology of which is shown at various stages adjacent to Figs. 13, 16, 19, and 21 in respective Figs. 13A, 16A, 19A, and 21A.
- the transmitting Wireless Reader Tags are shown in heavy bold outline, but the hierarchical levels are not indicated this time by inner circles and triangles.
- a first Wireless Reader Tag 1 wakes up and reads profile information stored in its memory, including a predefined class designation of "/circle” as its WRT Class. This profile is stored into the memory of the Wireless Reader Tag 1 during an initialization of the Wireless Reader Tag 1. Based on this class designation, Wireless Reader Tag 1 then listens for transmission activity by other Wireless Reader Tags of the same WRT Class. If the nearby Wireless Reader Tags of the WRT Class have already formed a Class Based Network for "/circle" accordance with the present invention, then Wireless Reader Tag 1 attempts to join such Class Based Network. Otherwise, Wireless Reader Tag 1 attempts to organize a Class Based Network for such WRT Class.
- Wireless Reader Tag 1 transmits a primaryjready signal including its designated WRT Class.
- the primary_ready signal is preferably a data packet that includes in its preamble data representative of the "circle" class designation.
- the bold boundary of Wireless Reader Tag 1 indicates that it transmits rather than receives.
- the range of the transmission is depicted by dashed circle "R.”
- each of Wireless Reader Tags 2-5 wakes up, receives, and processes the entire primaryjready signal, and then responds as shown in Fig. 13 and described below.
- each of the Wireless Reader Tags of the WRT Class "/circle" that received the primaryjready signal in Fig. 12 i.e., units 2-5) responds to the primaryjready signal with a registrationjrequest signal.
- Wireless Reader Tag 1 Upon receipt of the registrationjrequest signal, Wireless Reader Tag 1 assumes the status of a primary unit, while Wireless Reader Tags 2-5 assume the status of secondary units.
- Fig. 13 A shows the resulting 2-tiered network hierarchy tree representative of the Class Based Network thus formed between Wireless Reader Tags 1-5.
- Wireless Reader Tag 6 was out of range of Wireless Reader Tag l's primaryjready signal shown in Fig. 12, but is within range of the registrationjrequest of Wireless Reader Tags 3 and 5 shown in Fig. 13.
- the registration request signals indicate to Wireless Reader Tag 6 the presence of a nearby Class Based Network of corresponding WRT Class, which causes Wireless Reader Tag 6 to transmit a request to join this Class Based Network.
- Fig. 14 also depicts the beginning stages of the formation of a Class Based Network for the WRT Class of "/triangle" by Wireless Reader Tags A-G.
- Triangle Wireless Reader Tag A wakes up and listens for the presence of a "/triangle” class network. Detecting no other "/triangle" WRT Class signals, Wireless Reader Tag A fransmits a primaryjready signal, similar to the transmission of Wireless Reader Tag 1 shown in Fig. 1, but with a "/triangle” class designation forming part of the preamble of the primaryjready signal.
- triangle class Wireless Reader Tags B, C, and D receive the primaryjready signal of Wireless Reader Tag A and respond with registrationjrequest signals, thereby foirming a second hierarchal Class Based Network, as shown in Fig. 16A.
- circle Wireless Reader Tags 3 and 5 respond to the request to join of
- Wireless Reader Tag 6 of Fig. 14 with primaryjready signals.
- Wireless Reader Tag 6 then responds to the strongest primaryjready signal received (in this example, the signal from Wireless Reader Tag 5), with a registrationjrequest.
- Wireless Reader Tag 6 thereby forms a third tier of the Class Based Network for "/circle" WRT Class, also as shown in Fig. 16A.
- Wireless Reader Tags E, F, and G of the WRT Class "/triangle" each joins the Class Based Network for triangles formed by Wireless Reader Tags A, B, C, and D.
- Figs. 20-21A illustrate the completion of the Class Based Networks with the registration with the Gateway of the highest primary unit in each Class Based Network hierarchy.
- Class Based Networks facilitate automated and semi-automated segregation, tracking, monitoring, and delivery of assets.
- the server issues, via the Gateway, class- directed messages to monitor and track WRT Classes.
- User-defined class granularity facilitates the use of separate categories and/or subcategories for various attributes and states of the assets, e.g., production batches, phases of production, and the delivery process.
- messages or other class-directed communications from the application server can be directed to only those classes of interest representing such categories, subcategories, or sub-subcategories, as desired.
- messages or other class-directed communications are fransmitted in packets that specify class designations for intended transceiver recipients, only those transceivers that are members of the specified class awaken from standby mode to receive and process the packets, and then to acknowledge or reply thereto as appropriate. Accordingly, this reduces RF interference and power consumption otherwise experienced, while making asset-fracking functions more efficient.
- the Class Based Networks provide functionality as a dynamic distributed hierarchical database system.
- Wireless Reader Tags and Wireless Tags preferably include a handling routine in communication with a memory of the Wireless Reader Tags and Wireless Tags.
- the handling routine interprets and responds to class-directed database commands, e.g., data queries or data updates from an asset-tracking application or a Communicator.
- Database queries may include status queries that provide the asset-tracking application with real-time up-to-date status information about tagged assets.
- Data updates may include requests to change data maintained on specified Wireless Reader Tags of the distributed database system.
- class-directed database commands include preambles that identify a WRT Class of Wireless Reader Tags to which they are directed. In this manner, only those Wireless Reader Tags of the selected class need process the database command.
- Class-directed database commands may also include, in their preambles, a wildcard that indicates to query handling routines that all Wireless Reader Tags of a particular abstracted WRT Class should receive and process the database commands. Class-directed commands thereby avoid unnecessary radio interference and reduce power consumption by Wireless Reader Tags that are clearly outside the scope of the database search criteria. Database performance is also enhanced by selecting Wireless Reader Tag classes and class abstractions in a way that mirrors a preferred hierarchical structure for the data they contain. In this way, increased class granularity facilitates improved data retrieval efficiency in the distributed database system by reducing the number of Wireless Reader Tags that must be involved in a database query or update transaction.
- the Class Based Networks themselves act as a hierarchical database facilitating fast and efficient database queries.
- the CBNF routine used to form the Class Based Networks in accordance with the present invention may also be used to perform autonomous modification and reconfiguration of such networks in response to changes in the location, status, behavior, characteristics or class designation of Wireless Reader Tags and/or Wireless Tags.
- the self-configuration methods of the present invention facilitate maintenance of radio communication links in response to changes in the operational characteristics of the Wireless Reader Tags and/or Wireless Tags that comprise the network fabric.
- self-configuration routines are responsive to changes caused by battery drain, radio transmitter failures, radio interference, and digital processor failure, by their inherent methods of organizing the network to have optimal link integrity and node connectivity.
- Functions/Commands The following functions preferably are supported in an Wireless Reader Tag of the present invention — and in a Wireless Tag, where indicated — to accomplish the aforementioned class based network formation and subsequent reformation.
- the name of the function is followed by the description of the function in the context of the type of transceiver in which it is to be implemented, i.e., Wireless Reader Tag and/or Wireless Tag.
- the Wireless Reader Tags arbitrarily form networks based on the ability to talk to other Wireless Reader Tags.
- a Wireless Reader Tags wakes up it broadcasts a message to other Wireless Reader Tags that it is a primary unit seeking secondary units.
- Other Wireless Reader Tags awaken to receive the message and attempt to register with the primary unit. If they are unable to communicate with the primary unit, or if the primary unit's cluster is full, then the secondary units will attempt to become a primary unit and continue the process.
- the highest primary unit of the hierarchy contacts the Gateway and communicates with the application server, whereupon a profile is downloaded to the primary unit and passed on to each Wireless Reader Tag of the network.
- the profile downloaded is based on options such as reading Wireless Tags, WRT IDs, business rules located at the application server and other information that has been downloaded by a Communicator.
- the profile is a list of attributes or "personalities" assigned to each WRT.
- the list in the profile will be determined by business rules (like "things move into the shipping are ready to be shipped", "all fresh meat shipments must leave the plant within 24 hours of packing", etc.); a Communicator (used, for example, by a supervisor who views the asset and determines that it needs another coat of painting and manually changes the class back to "pre-paint step", etc.); and server application (first two- hundred assets shipped to New Jersey, next two-hundred assts shipped to Florida, last five-hundred assets shipped to California, etc.).
- the profile function can allow conditional class change.
- the Wireless Reader Tags reform in Class Based Networks based on rules defined by the software located on the Wireless
- the WR Class can be pre-programmed into the
- Class is based on rules defined by the application server.
- Allow Class/State Change - Class changes are allowed based on business rules setup by the customer to track and group their assets.
- the rules are built into the server application and the software on the Wireless Reader Tags.
- the profile provides information that allows dynamic decisions to be made by the Wireless Reader Tags. Once the Wireless Reader Tags have determined that their category, subcategory, etc. as represented by their WRT Class has changed, the Wireless Reader Tags must join the new WRT Class.
- the ability to allow such a class change provides functionality to allow dynamic changes to WRT Class by a Wireless Reader Tag. For example, with reference to Figs.
- Form Class - A Class Based Network for a new class can be established by downloading a new profile and using the command "Determine Primary". The command then uses techniques in Figs. 2-21 to establish the Class Based Network for the new class. Profiles and software on the Wireless Reader Tags form the basis for decisions on network formation. The profile must be preprogrammed in the Wireless Reader Tags or Wireless Tags or downloaded from the application server.
- Combine Classes The combination of classes is required when the user no longer wishes to differentiate between two originally defined classes.
- the profile is downloaded either as a new class profile that has a new class name or downloads to the class to be replaced by the other existing class.
- the Wireless Reader Tags may reform the network using the CBNF routines of the present invention.
- a Wireless Reader Tag When a Wireless Reader Tag "wakes up”, it determines whether it is able to become a primary unit with the determine prhnary command. If the health of the device is sufficient, it sends out a message to other Wireless Reader Tags of its WRT Class for regisfration of secondary units.
- Ping MLG/Gateway/Communicator -A Wireless Reader Tag incorporated into a MLG, Gateway, or Communicator sends out a special message identifying itself as part of an MLG, Gateway, or Communicator.
- the purpose of this message is to inform other Wireless Reader Tags in stand-alone mode that the Wireless Reader Tag incorporated into the MLG, Gateway, or communicator has additional capabilities.
- the identifying message allows the Communicator to query information from the Wireless Reader Tags or Wireless Tags while the message from the Gateway and MLG indicate an ability to communicate to the external network.
- the Wireless Reader Tag will read all Wireless Tags within range.
- the profile downloaded from the application server will help the Wireless Reader Tag control misreads and extra tags. Multiple reads of the tags insures high reliability.
- a Wireless Reader Tag Upon formation of a Class Based Network, a Wireless Reader Tag stores identifiers that describe the Wireless Reader Tags constituting neighbors in adjacent levels of the network hierarchy. The primary unit thus will store all the WRT IDs for its secondary units, while the secondary units will store the WRT IDs on the primary unit and any secondary units thereto.
- Wireless Reader Tag may store WRT Class information about other Wireless Reader Tags in their vicinity.
- the Wireless Reader Tags will support queries from the application server to supply this intelligence regarding local class information, regardless of whether the reported class even maintains connectivity to the application server.
- the secondary only command provides entry into a system without giving network fonnation rights.
- the Wireless Reader Tag with this designation in the profile is allowed to act like the other secondary Wireless Reader Tags, but it is unable to take on the role of a primary unit and, thus, is itself restricted from further propagating the network.
- This allows the Wireless Reader Tag the ability to move from one WRT Class to another WRT Class without otherwise disturbing the hierarchy of each Class Based Network of which it becomes a part.
- a practical of this command enables a customer, who walks into a warehouse retailer, to read product names, costs, or locations in the store without interrupting or disturbing the resident asset-tracking application.
- each Wireless Reader Tag contains software that is preprogrammed to interpret class information contained in the preamble of messages being transmitted by other Wireless Reader Tags and then negotiate to be a primary unit.
- the Wireless Reader Tags use commands such as inventory Wireless Tags, determine primary, and others (described above) to make decisions on class and otlier profile information that has been preprogrammed in the Wireless Reader Tags. Once the Wireless Reader Tags have formed the Class Based Network, information is transmitted by the Wireless Reader Tags for connectivity to server applications.
- Wireless Reader Tags are attached to pallets or areas to read information from Wireless Tags.
- the Wireless Reader Tags are turned on and first form an arbitrary network using commands such as Determine Primary. This arbitrary formation is done so that the server can address particular Wireless Reader Tags, and the formation is not based on class designations.
- the Wireless Tags are read by the Wireless Reader Tags and profiles are downloaded to the Wireless Tags from the Wireless Reader Tags based on commands such as "Inventory RF Tags", described above.
- Profiles defining a new class structure are then downloaded from the server to the Wireless Reader Tags (and any read/write Wireless Tags) based on business rules.
- the Wireless Reader Tags are then instructed to Determine Primary again, whereby Class Based Networks are formed according to the newly- assigned class structure.
- the profiles are lists of options that the Wireless Reader Tag can use to make decisions. For example, if a pallet has TVs on it and the profile lists possible products as VCRs, TVs, Cameras and Unknown, then the Wireless Reader Tag knows to adopt the class of TVs and form a network accordingly. If TV was not in the list, then the Wireless Reader Tag could adopt the class Unknown and generate a system flag for further analysis.
- the Wireless Reader Tags are loaded with software preprogrammed to interpret profile information.
- the profile information may include WT IDs, states, and the like.
- the Wireless Reader Tags then are reset and boot up looking to read the saved profile, to form hierarchical networks based on class designations specified in the profile, and to look for primary/secondary configurations.
- network server business rules are downloaded to the Wireless Reader Tags in the form of new profiles to "fine tune" the network.
- general information about how a particular business operates is used to setup the network. Not enough information is known, however, about the assets.
- information can be stored in the Wireless Tags as they are attached to the assets, and profiles in the Wireless Reader Tags can enable the Wireless Reader Tags to read this information and make intelligent decisions about how to efficiently setup the network so that the data is an organized within the database in a performance-enhancing fashion.
- Example 1 Tagged Luggage System
- a Wireless Tag is attached to each item of the passenger's luggage.
- a corresponding Wireless Tag identifying the passenger is provided to the passenger to verify his/her identity at the destination baggage pickup location.
- a Wireless Reader Tag near the check-in counter detects and logs the Wireless Tags for the luggage in association with the passenger's Wireless Tag and related information into the asset-tracking system.
- the asset-fracking system downloads a profile into each of the Wireless Tags as identified by the Wireless Reader Tag at the check-in counter.
- the profiles are in the fonnat:
- Trucks that deliver the luggage to the plane also have Wireless Reader Tags attached to the truck and alter the Tag_Status to "departure_on-transfer-truck-1441".
- Yet another Wireless Reader Tag detects and logs the Wireless Tag into the asset-tracking system, whereupon a cross-check is made of the luggage as identified by the WT IDs with the luggage that is supposed to be on the plane. Any luggage that is not supposed to be on the plane is flagged for removal by the asset-tracking system and rerouted to its proper destination. Any luggage that is not accounted for raises an alarm, so that attendants are alerted to its arrival time, its position, or its last known position and an investigation can be made.
- the Wireless Tags of the luggage are detected and logged in by an Wireless Reader Tag and the Tag_Status field of each Wireless Tag is changed to "arrival_on-transfer-truck-6633".
- the Wireless Tags on the luggage are read by a Wireless Reader Tag located near an exit of the baggage area.
- the Wireless Reader Tag detects and logs the luggage Wireless Tags in association with the Wireless Tag of the passenger claiming the luggage, whereupon the asset-tracking system assures that the passenger claiming the luggage is authorized to do so. A passenger inadvertently selecting the wrong luggage may then be alerted to the error.
- a warehouse store such as Costco carries hundreds of brands of products. Nevertheless, all products need to be inventoried on a real-time basis.
- a Wireless Reader Tag is attached to each pallet of goods and assigned a class designation that denotes the manufacturer of goods on that pallet (e.g., Pillsbury, Sony, Kellogg's, etc.).
- Each Wireless Reader Tag may also include in its class designation or profile, information about the goods on the pallet.
- Each boxes on the pallet carries a Wireless Tag that is read by the Wireless Reader Tag of the pallet.
- each Wireless Reader Tag gathers infonnation about the Wireless Tags on its pallet and relays the information back to the asset-tracking application server.
- an employee of the warehouse store can inventory goods of a selected manufacturer by sending a query that will be received only by Wireless Reader Tags of the selected class corresponding to such manufacturer. Messages directed to a selected class will not appreciably affect the battery life of Wireless Reader Tags of other classes, as only Wireless Reader Tags of the selected class will wake up from standby mode to receive the messages and process the query.
- the manufacturer classes can be divided further into categories and subcategories, thereby further collectively reduce battery consumption and radio interference.
- Containers full of material shipped via rail or ship can be received and logged into a yard by manufacture based on class information stored on Wireless Reader Tags.
- the Wireless Reader Tags form a network with other containers from a particular manufacturer and allow quick and efficient tracking of containers. Messages directed to a selected class will not affect the battery life of Wireless Reader Tags of other classes because only Wireless Reader Tags of the selected class will wake up from standby to receive the messages and process the queries.
- the manufacturer classes can be divided into categories and subcategories, thereby further collectively reduce battery consumption and radio interference.
- a computer manufacturer may track the status of its supply chain in accordance with the asset-tracking application of the present invention.
- the classes defined are "raw material,” “component stuffing,” “monitor assembly,” “final assembly,” “shipping,” “in transit,” and “distributor.”
- the manufacture can inventory raw material throughout the process by addressing the raw material class, and can find out where in the manufacturing process the computer has reached by addressing monitor assembly or final assembly classes.
- each WRT Class has more than one member. Otherwise, the sole member of the WRT Class communicates directly with a Gateway. However, this scenario is contemplated within the scope of the present invention.
- each Wireless Reader Tag has been described as belonging to a particular
- WRT Class class membership for each Wireless Reader Tag need not necessarily be exclusive, and a Wireless Reader Tag therefore may belong to more than one WRT Class as desired in any particular application of the present invention.
- each WRT Class has been described as reading a particular WT Class associated therewith, each Wireless Reader Tag may read Wireless Tags associated with different WRT Classes, as desired in the asset-tracking application.
- each Wireless Reader Tag includes the capabilities of each Wireless Tag and, therefore, it is contemplated within the scope of the present invention that each Wireless Tag of the present invention could be replaced with a Wireless Reader Tag.
- a Wireless Tag is passive, which is contemplated within the scope of the present invention, then it is believed that the Wireless Tag currently maintains therein only its unique WT ID. Being passive, no other information is maintained in the Wireless Tag. In this case, an associated Wireless Reader Tag maintains the identification of its WT Class in memory as indexed by the respective WT ID of the passive Wireless Tag. Any other information, if maintained, also is stored in the Wireless Reader Tag and indexed by WT ID, where appropriate.
- any broadcast generally is answered by each passive Wireless Tag that is within broadcast range and, hence, such implementation of passive Wireless Tags, while within the scope of the present invention, is not preferred.
- Active Transceiver refers to a transceiver that receives and fransmits using internally stored energy, such as a battery.
- Ah refers to an ampere hour, also referred to as “amp hour,” and is the amount of energy charge in a battery that will allow one ampere of current to flow for one hour.
- Asset refers to any person or article desired to be tracked.
- an asset may be an employee, a team member, a law enforcement officer, or a member of the military.
- an asset may be, for example, a good, product, package, item, vehicle, warehoused material, baggage, passenger luggage, shipping container, belonging, commodity, effect, resource, or merchandise.
- Asset Class refers to a classification of Assets — whether the same or different — that share something in common, such as an attribute, characteristic, relation, or behavior.
- Class or Class Designation refers to a classification of Assets, or a classification of WRTs and/or WTs that is representative of a classification of Assets.
- a Class Designation can comprise, for example, a category, subcategory, or sub-subcategory, etc., of an Asset. See “Asset Class,” “WRT Class,” and “WT Class.”
- LPRF Device refers to a two-way wireless radio-frequency data communications device that receives and transmits data in packets.
- a LPRF Device may comprise, for example, a Bluetooth radio or other standards based radio.
- mA refers to 1,000th of an ampere.
- mAh refers to 1,000th of an amp hour, and is commonly used as a measure of charge in batteries. The mAh provides a general indication of how long an electronic device will operate on its battery.
- Object Identifier refers to an identifier of a WRT or a WT and may comprise, respectively, the WRT ID or WT ID, the WRT Class or WT Class, or some other identification of the WRT or WT, which may be related or unrelated to Class.
- Passive Transceiver refers to a transceiver that receives and fransmits primarily using inductive energy.
- Profile refers to information stored in memory of a WRT that includes a list of attributes that invoke operating system functions, and can include information such as WRT Class and adopted class. Virtually any profile information can be included in the preamble of a data packet and combined with Class Designation information to be used for network formation.
- Semi-Passive Transceiver refers to a transceiver that receives primarily using inductive energy and transmits using internally stored energy, such as a battery.
- ⁇ A refers to 1,000,000th of an ampere.
- WRT also called herein a wireless reader tag, refers to a wireless transceiver that generally is used to read WTs. WRTs can be, for example, passive, active, or semi-passive, but preferably each WRT is an active transceiver.
- WRT Broadcast refers to a broadcast made to WRTs.
- WRT Class refers to a classification of a WRT that is representative of an Asset Class of an Asset associated either with the WRT or with a WT that is read by the WRT.
- the WRT Class may also include other information concerning a status, characteristic, or privilege of the WRT, network, or other condition.
- WRT ID refers to an identification that uniquely identifies a WRT from other WRTs.
- WT also called a wireless tag, refers to a wireless transceiver that is associated with an Asset to be fracked.
- WTs can be, for example, passive, active, or semi-passive, but preferably each WT is a semi-passive transceiver.
- WT Component refers to a receiver circuit traditionally found in a WT, but modified for use in a WRT to provide an elecfronic signal at an input of the LPRF communications component for activating or waking it up.
- a modified RFID tag such as a FSK radio, a PM radio, or an AM radio
- a modified receiver circuit may comprise the WT component of the WRT, in which case the WT component, in addition to the LPRF communications component, maybe capable of transmitting.
- WT Broadcast refers to a broadcast made to WTs.
- WT Class refers to a classification of a WT that is representative of an Asset Class of an Asset associated with the WT.
- WT ID refers to an identification that uniquely identifies a WT from other WTs.
Landscapes
- Engineering & Computer Science (AREA)
- Physics & Mathematics (AREA)
- Computer Networks & Wireless Communication (AREA)
- General Physics & Mathematics (AREA)
- Computer Vision & Pattern Recognition (AREA)
- Artificial Intelligence (AREA)
- Signal Processing (AREA)
- Theoretical Computer Science (AREA)
- Health & Medical Sciences (AREA)
- Toxicology (AREA)
- Electromagnetism (AREA)
- General Health & Medical Sciences (AREA)
- Mobile Radio Communication Systems (AREA)
Abstract
Description
Claims
Priority Applications (61)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
AU2003249633A AU2003249633A1 (en) | 2002-05-14 | 2003-05-14 | Lprf device wake up using wireless tag |
EP03753022A EP1510023A4 (en) | 2002-05-14 | 2003-05-14 | Lprf device wake up using wireless tag |
US10/514,336 US7209771B2 (en) | 2000-12-22 | 2003-05-14 | Battery powered wireless transceiver having LPRF component and second wake up receiver |
US10/987,964 US7155264B2 (en) | 2000-12-22 | 2004-11-12 | Systems and methods having LPRF device wake up using wireless tag |
US10/987,884 US7133704B2 (en) | 2000-12-22 | 2004-11-12 | Manufacture of LPRF device wake up using wireless tag |
US11/161,540 US7200132B2 (en) | 2000-12-22 | 2005-08-08 | Forming ad hoc RSI networks among transceivers sharing common designation |
US11/161,539 US7209468B2 (en) | 2000-12-22 | 2005-08-08 | Forming communication cluster of wireless AD HOC network based on common designation |
US11/161,550 US7430437B2 (en) | 2000-12-22 | 2005-08-08 | Transmitting sensor-acquired data using step-power filtering |
US11/161,545 US7221668B2 (en) | 2000-12-22 | 2005-08-08 | Communications within population of wireless transceivers based on common designation |
US11/161,542 US7522568B2 (en) | 2000-12-22 | 2005-08-08 | Propagating ad hoc wireless networks based on common designation and routine |
US11/610,427 US7733818B2 (en) | 2000-12-22 | 2006-12-13 | Intelligent node communication using network formation messages in a mobile Ad hoc network |
US11/847,309 US8238826B2 (en) | 2000-12-22 | 2007-08-29 | Method for supplying container security |
US11/847,295 US8068807B2 (en) | 2000-12-22 | 2007-08-29 | System for supplying container security |
US11/930,793 US7940717B2 (en) | 2000-12-22 | 2007-10-31 | Selective wake-up of data packet radio component using common designation communication |
US11/930,788 US8284741B2 (en) | 2000-12-22 | 2007-10-31 | Communications and systems utilizing common designation networking |
US11/930,749 US7538658B2 (en) | 2000-12-22 | 2007-10-31 | Method in a radio frequency addressable sensor for communicating sensor data to a wireless sensor reader |
US11/930,761 US8331862B2 (en) | 2000-12-22 | 2007-10-31 | Radio frequency identification based networks |
US11/930,770 US20080144554A1 (en) | 2000-12-22 | 2007-10-31 | Radio frequency identification sensor network |
US11/930,740 US7538657B2 (en) | 2000-12-22 | 2007-10-31 | Radio frequency identification based sensor |
US11/930,777 US20080111692A1 (en) | 2000-12-22 | 2007-10-31 | Radio frequency identification based sensor |
US11/930,736 US7538656B2 (en) | 2000-12-22 | 2007-10-31 | Radio frequency identification based sensor |
US11/930,782 US20080212544A1 (en) | 2000-12-22 | 2007-10-31 | Method in a wireless sensor reader for obtaining sensor data from a radio frequency addressable sensor |
US11/930,753 US7535339B2 (en) | 2000-12-22 | 2007-10-31 | Radio frequency identification based sensor reader |
US11/930,797 US7940736B2 (en) | 2000-12-22 | 2007-10-31 | Selective response to radio frequency (RF) transmissions by wireless two-way RF data communication device |
US11/930,779 US20080129458A1 (en) | 2000-12-22 | 2007-10-31 | Radio frequency identification based sensor |
US12/168,195 US20080304443A1 (en) | 2000-12-22 | 2008-07-07 | Standards based communictions for a container security system |
US12/202,247 US20090016308A1 (en) | 2000-12-22 | 2008-08-30 | Antenna in cargo container monitoring and security system |
US12/343,865 US7830850B2 (en) | 2000-12-22 | 2008-12-24 | Class-switching in class-based data communcations network |
US12/349,687 US8050625B2 (en) | 2000-12-22 | 2009-01-07 | Wireless reader tags (WRTs) with sensor components in asset monitoring and tracking systems |
US12/349,719 US8315563B2 (en) | 2000-12-22 | 2009-01-07 | Wireless reader tags (WRTs) with sensor components in asset monitoring and tracking systems |
US12/349,700 US8095070B2 (en) | 2000-12-22 | 2009-01-07 | Wireless reader tags (WRTS) with sensor components in asset monitoring and tracking systems |
US12/349,863 US8204439B2 (en) | 2000-12-22 | 2009-01-07 | Wireless reader tags (WRTs) with sensor components in asset monitoring and tracking systems |
US12/353,961 US7742744B2 (en) | 2000-12-22 | 2009-01-14 | Screening transmissions for power level and object identifier in asset monitoring and tracking systems |
US12/367,542 US7746838B2 (en) | 2000-12-22 | 2009-02-08 | Logically distinct wireless data communication networks sharing gateway for communicating with external networks |
US12/367,544 US7830852B2 (en) | 2000-12-22 | 2009-02-08 | Automatic and dynamic changing of class in class-based asset tracking and monitoring systems |
US12/367,543 US7940719B2 (en) | 2000-12-22 | 2009-02-08 | Automatic and dynamic changing of class in class-based networks |
US12/370,558 US8326226B2 (en) | 2000-12-22 | 2009-02-12 | Wake-up in class-based networking |
US12/411,205 US8301082B2 (en) | 2000-12-22 | 2009-03-25 | LPRF device wake up using wireless tag |
US12/436,739 US7941095B2 (en) | 2000-12-22 | 2009-05-06 | LPRF device wake up using wireless tag |
US12/471,348 US8284045B2 (en) | 2000-12-22 | 2009-05-22 | Container tracking system |
US12/473,264 US8218514B2 (en) | 2000-12-22 | 2009-05-27 | Wireless data communications network system for tracking containers |
US12/475,395 US7742745B2 (en) | 2000-12-22 | 2009-05-29 | LPRF device wake up using wireless tag |
US12/496,623 US20090267770A1 (en) | 2000-12-22 | 2009-07-01 | Lprf device wake up using wireless tag |
US12/553,062 US20100007470A1 (en) | 2000-12-22 | 2009-09-02 | Lprf device wake up using wireless tag |
US12/556,538 US8280345B2 (en) | 2000-12-22 | 2009-09-09 | LPRF device wake up using wireless tag |
US12/684,827 US20100121862A1 (en) | 2000-12-22 | 2010-01-08 | Lprf device wake up using wireless tag |
US12/694,856 US20100130267A1 (en) | 2000-12-22 | 2010-01-27 | Lprf device wake up using wireless tag |
US12/703,564 US20100141401A1 (en) | 2000-12-22 | 2010-02-10 | Lprf device wake up using wireless tag |
US12/703,573 US8315565B2 (en) | 2000-12-22 | 2010-02-10 | LPRF device wake up using wireless tag |
US12/762,010 US20100330930A1 (en) | 2000-12-22 | 2010-04-16 | Lprf device wake up using wireless tag |
US12/768,065 US20100219938A1 (en) | 2000-12-22 | 2010-04-27 | Screening transmissions for power level and object identifier in asset monitoring and tracking systems |
US12/772,818 US20100219939A1 (en) | 2000-12-22 | 2010-05-03 | Screening transmissions for power level and object identifier in asset monitoring and tracking systems |
US12/774,589 US20100214060A1 (en) | 2000-12-22 | 2010-05-05 | Wireless data communications network system for tracking containers |
US12/774,575 US20100214074A1 (en) | 2000-12-22 | 2010-05-05 | Lprf device wake up using wireless tag |
US12/780,823 US8078139B2 (en) | 2000-12-22 | 2010-05-14 | Wireless data communications network system for tracking container |
US12/783,114 US20100231381A1 (en) | 2000-12-22 | 2010-05-19 | Lprf device wake up using wireless tag |
US12/813,996 US20100250460A1 (en) | 2000-12-22 | 2010-06-11 | Lprf device wake up using wireless tag |
US12/821,745 US20100260087A1 (en) | 2000-12-22 | 2010-06-23 | Lprf device wake up using wireless tag |
US12/882,574 US20110006882A1 (en) | 2000-12-22 | 2010-09-15 | Lprf device wake up using wireless tag |
US12/938,934 US20110047015A1 (en) | 2000-12-22 | 2010-11-03 | Network formation in asset-tracking system based on asset class |
US13/620,912 US8837447B2 (en) | 2000-12-22 | 2012-09-15 | Communications and systems utilizing common designation networking |
Applications Claiming Priority (4)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
US38019502P | 2002-05-14 | 2002-05-14 | |
US60/380,195 | 2002-05-14 | ||
US38067002P | 2002-05-16 | 2002-05-16 | |
US60/380,670 | 2002-05-16 |
Related Parent Applications (5)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
US09/681,282 Continuation-In-Part US6745027B2 (en) | 2000-12-22 | 2001-03-13 | Class switched networks for tracking articles |
PCT/US2001/049513 Continuation-In-Part WO2003032501A2 (en) | 2000-12-22 | 2001-12-26 | Network formation in asset-tracking system based on asset class |
US38019502P Continuation-In-Part | 2000-12-22 | 2002-05-14 | |
PCT/US2003/014987 Continuation-In-Part WO2003098851A1 (en) | 2000-12-22 | 2003-05-14 | Lprf device wake up using wireless tag |
US12/556,538 Continuation-In-Part US8280345B2 (en) | 2000-12-22 | 2009-09-09 | LPRF device wake up using wireless tag |
Related Child Applications (17)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
US09/681,282 Continuation-In-Part US6745027B2 (en) | 2000-12-22 | 2001-03-13 | Class switched networks for tracking articles |
PCT/US2001/049513 Continuation-In-Part WO2003032501A2 (en) | 2000-12-22 | 2001-12-26 | Network formation in asset-tracking system based on asset class |
US10/514,336 A-371-Of-International US7209771B2 (en) | 2000-12-22 | 2003-05-14 | Battery powered wireless transceiver having LPRF component and second wake up receiver |
PCT/US2003/014987 Continuation-In-Part WO2003098851A1 (en) | 2000-12-22 | 2003-05-14 | Lprf device wake up using wireless tag |
US10514336 A-371-Of-International | 2003-05-14 | ||
US10514336 Continuation-In-Part | 2003-05-14 | ||
US10/987,884 Continuation US7133704B2 (en) | 2000-12-22 | 2004-11-12 | Manufacture of LPRF device wake up using wireless tag |
US10/987,884 Continuation-In-Part US7133704B2 (en) | 2000-12-22 | 2004-11-12 | Manufacture of LPRF device wake up using wireless tag |
US10/987,964 Continuation-In-Part US7155264B2 (en) | 2000-12-22 | 2004-11-12 | Systems and methods having LPRF device wake up using wireless tag |
US10/987,964 Continuation US7155264B2 (en) | 2000-12-22 | 2004-11-12 | Systems and methods having LPRF device wake up using wireless tag |
US11/161,550 Continuation-In-Part US7430437B2 (en) | 2000-12-22 | 2005-08-08 | Transmitting sensor-acquired data using step-power filtering |
US11/161,540 Continuation-In-Part US7200132B2 (en) | 2000-12-22 | 2005-08-08 | Forming ad hoc RSI networks among transceivers sharing common designation |
US11/161,539 Continuation-In-Part US7209468B2 (en) | 2000-12-22 | 2005-08-08 | Forming communication cluster of wireless AD HOC network based on common designation |
US11/161,545 Continuation-In-Part US7221668B2 (en) | 2000-12-22 | 2005-08-08 | Communications within population of wireless transceivers based on common designation |
US11/161,542 Continuation-In-Part US7522568B2 (en) | 2000-12-22 | 2005-08-08 | Propagating ad hoc wireless networks based on common designation and routine |
US11161545 Continuation-In-Part | 2006-08-08 | ||
US12/140,253 Continuation-In-Part US20080303897A1 (en) | 2000-12-22 | 2008-06-16 | Visually capturing and monitoring contents and events of cargo container |
Publications (1)
Publication Number | Publication Date |
---|---|
WO2003098851A1 true WO2003098851A1 (en) | 2003-11-27 |
Family
ID=29553493
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
PCT/US2003/014987 WO2003098851A1 (en) | 2000-12-22 | 2003-05-14 | Lprf device wake up using wireless tag |
Country Status (3)
Country | Link |
---|---|
EP (1) | EP1510023A4 (en) |
AU (1) | AU2003249633A1 (en) |
WO (1) | WO2003098851A1 (en) |
Cited By (16)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
WO2005046266A1 (en) * | 2003-11-10 | 2005-05-19 | Nokia Corporation | Controlling method, secondary unit and radio terminal equipment |
DE10360512A1 (en) * | 2003-12-22 | 2005-07-21 | It Xperts Gmbh | Portable data processing equipment for Personal Area Network, uses antenna to switch on equipment and wirelessly connect it to network |
WO2005081565A1 (en) * | 2004-01-26 | 2005-09-01 | Nokia Corporation | Method, apparatus and computer program product for intuitive energy management of a short-range communication transceiver associated with a mobile terminal |
EP1587253A1 (en) * | 2004-04-12 | 2005-10-19 | Sony Corporation | Communications system for multimedia exchange between parent and child unit |
WO2006001845A1 (en) * | 2004-06-14 | 2006-01-05 | Oracle International Corporation | Methods and systems for verifying the position and status of hierarchically arranged objects |
WO2006039059A1 (en) * | 2004-09-30 | 2006-04-13 | Intel Corporation | Power-scavenging receiver for generating a signal to be used to control operational state |
WO2006103516A1 (en) * | 2005-03-30 | 2006-10-05 | Nokia Corporation | Reducing power consumption of a short-range wireless communication reader associated with a mobile terminal |
WO2006113043A1 (en) * | 2005-04-14 | 2006-10-26 | Motorola, Inc. | Method and system for operating a wireless device with a radio frequency identification tag |
WO2007072264A2 (en) * | 2005-12-21 | 2007-06-28 | Koninklijke Philips Electronics N.V. | Collaborating rfid devices |
WO2009118012A1 (en) * | 2008-03-26 | 2009-10-01 | Aalborg Universitet | Device and method for activating a communication unit |
WO2010138605A1 (en) * | 2009-05-26 | 2010-12-02 | Qualcomm Incorporated | Power management of sensors within a mobile device |
WO2011064338A1 (en) * | 2009-11-26 | 2011-06-03 | Fraunhofer-Gesellschaft zur Förderung der angewandten Forschung e.V. | A data transmission apparatus and a method for activating a data transmission |
US8243639B2 (en) | 2008-02-27 | 2012-08-14 | Motorola Solutions, Inc. | Method for controlling a wake up rate of nodes operating within a multi-hop communication system |
US20120235860A1 (en) * | 2006-04-25 | 2012-09-20 | Ghazarian Ohanes D | Automatic GPS tracking system with passive or active battery circuitry |
US8289916B2 (en) | 2004-04-30 | 2012-10-16 | Research In Motion Limited | Wireless communication device with duress password protection and related method |
EP2704462A1 (en) * | 2011-04-27 | 2014-03-05 | Hitachi Industrial Equipment Systems Co., Ltd. | Wireless device and wireless network system |
Citations (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US6256303B1 (en) * | 1999-10-15 | 2001-07-03 | Akoo, Inc. | Wireless broadcast link to remote receiver |
US20020039896A1 (en) * | 2000-10-04 | 2002-04-04 | Brown Barry Allen Thomas | Method and apparatus for disabling mobile telephones |
US20020098861A1 (en) * | 2001-01-19 | 2002-07-25 | International Business Machines Corporation | Method and system for preventing wireless devices from interfering with other equipment in a sensitive area |
US20020146985A1 (en) * | 2001-01-31 | 2002-10-10 | Axonn Corporation | Battery operated remote transceiver (BORT) system and method |
Family Cites Families (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPH06177824A (en) * | 1992-12-11 | 1994-06-24 | Matsushita Electric Ind Co Ltd | Mobile radio equipment |
US5790946A (en) * | 1993-07-15 | 1998-08-04 | Rotzoll; Robert R. | Wake up device for a communications system |
-
2003
- 2003-05-14 EP EP03753022A patent/EP1510023A4/en not_active Withdrawn
- 2003-05-14 WO PCT/US2003/014987 patent/WO2003098851A1/en not_active Application Discontinuation
- 2003-05-14 AU AU2003249633A patent/AU2003249633A1/en not_active Abandoned
Patent Citations (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US6256303B1 (en) * | 1999-10-15 | 2001-07-03 | Akoo, Inc. | Wireless broadcast link to remote receiver |
US20020039896A1 (en) * | 2000-10-04 | 2002-04-04 | Brown Barry Allen Thomas | Method and apparatus for disabling mobile telephones |
US20020098861A1 (en) * | 2001-01-19 | 2002-07-25 | International Business Machines Corporation | Method and system for preventing wireless devices from interfering with other equipment in a sensitive area |
US20020146985A1 (en) * | 2001-01-31 | 2002-10-10 | Axonn Corporation | Battery operated remote transceiver (BORT) system and method |
Non-Patent Citations (1)
Title |
---|
See also references of EP1510023A4 * |
Cited By (38)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
WO2005046266A1 (en) * | 2003-11-10 | 2005-05-19 | Nokia Corporation | Controlling method, secondary unit and radio terminal equipment |
US7672693B2 (en) | 2003-11-10 | 2010-03-02 | Nokia Corporation | Controlling method, secondary unit and radio terminal equipment |
DE10360512A1 (en) * | 2003-12-22 | 2005-07-21 | It Xperts Gmbh | Portable data processing equipment for Personal Area Network, uses antenna to switch on equipment and wirelessly connect it to network |
US7145454B2 (en) | 2004-01-26 | 2006-12-05 | Nokia Corporation | Method, apparatus and computer program product for intuitive energy management of a short-range communication transceiver associated with a mobile terminal |
WO2005081565A1 (en) * | 2004-01-26 | 2005-09-01 | Nokia Corporation | Method, apparatus and computer program product for intuitive energy management of a short-range communication transceiver associated with a mobile terminal |
US7265667B2 (en) | 2004-04-12 | 2007-09-04 | Sony Corporation | Communication system, communication apparatus, image reception system, and communication method |
US7498939B2 (en) | 2004-04-12 | 2009-03-03 | Sony Corporation | Communication system, communication apparatus, image reception system, and communication method |
EP1587253A1 (en) * | 2004-04-12 | 2005-10-19 | Sony Corporation | Communications system for multimedia exchange between parent and child unit |
CN100382596C (en) * | 2004-04-12 | 2008-04-16 | 索尼株式会社 | Communication system,communication device, image receiving system and communication method |
US8503974B2 (en) | 2004-04-30 | 2013-08-06 | Research In Motion Limited | Wireless communication device with password protection and related method |
US8289916B2 (en) | 2004-04-30 | 2012-10-16 | Research In Motion Limited | Wireless communication device with duress password protection and related method |
US7088229B2 (en) | 2004-06-14 | 2006-08-08 | Oracle International Corporation | Methods and systems for verifying the position and status of hierarchically arranged objects |
CN1969285B (en) * | 2004-06-14 | 2012-10-17 | 甲骨文国际公司 | Methods and systems for verifying the position and status of hierarchically arranged objects |
JP2008502559A (en) * | 2004-06-14 | 2008-01-31 | オラクル・インターナショナル・コーポレイション | Method and system for inspecting the position and status of hierarchically arranged objects |
US7646292B2 (en) | 2004-06-14 | 2010-01-12 | Oracle International Corporation | Methods and systems for verifying the position and status of hierarchically arranged objects |
WO2006001845A1 (en) * | 2004-06-14 | 2006-01-05 | Oracle International Corporation | Methods and systems for verifying the position and status of hierarchically arranged objects |
WO2006039059A1 (en) * | 2004-09-30 | 2006-04-13 | Intel Corporation | Power-scavenging receiver for generating a signal to be used to control operational state |
US8942631B2 (en) | 2004-09-30 | 2015-01-27 | Intel Corporation | Power-scavenging receiver to generate a signal to be used to control operational state |
US8180291B2 (en) | 2004-09-30 | 2012-05-15 | Intel Corporation | Power-scavenging receiver to generate a signal to be used to control operational state |
US7720438B2 (en) | 2005-03-30 | 2010-05-18 | Nokia Corporation | Reducing power consumption of a short-range wireless communication reader associated with a mobile terminal |
WO2006103516A1 (en) * | 2005-03-30 | 2006-10-05 | Nokia Corporation | Reducing power consumption of a short-range wireless communication reader associated with a mobile terminal |
WO2006113043A1 (en) * | 2005-04-14 | 2006-10-26 | Motorola, Inc. | Method and system for operating a wireless device with a radio frequency identification tag |
US9524405B2 (en) | 2005-12-21 | 2016-12-20 | Koninklijke Philips N.V. | Collaborating RFID devices |
EP1966738B1 (en) | 2005-12-21 | 2018-03-07 | Koninklijke Philips N.V. | Collaborating rfid devices |
WO2007072264A3 (en) * | 2005-12-21 | 2007-10-11 | Koninkl Philips Electronics Nv | Collaborating rfid devices |
WO2007072264A2 (en) * | 2005-12-21 | 2007-06-28 | Koninklijke Philips Electronics N.V. | Collaborating rfid devices |
US20120235860A1 (en) * | 2006-04-25 | 2012-09-20 | Ghazarian Ohanes D | Automatic GPS tracking system with passive or active battery circuitry |
US8243639B2 (en) | 2008-02-27 | 2012-08-14 | Motorola Solutions, Inc. | Method for controlling a wake up rate of nodes operating within a multi-hop communication system |
WO2009118012A1 (en) * | 2008-03-26 | 2009-10-01 | Aalborg Universitet | Device and method for activating a communication unit |
US8405505B2 (en) | 2009-05-26 | 2013-03-26 | Qualcomm Incorporated | Power management of sensors within a mobile device |
WO2010138605A1 (en) * | 2009-05-26 | 2010-12-02 | Qualcomm Incorporated | Power management of sensors within a mobile device |
KR101324801B1 (en) | 2009-05-26 | 2013-11-01 | 퀄컴 인코포레이티드 | Power management of sensors within a mobile device |
TWI424734B (en) * | 2009-05-26 | 2014-01-21 | Qualcomm Inc | Method, apparatus, and computer-readable storage medium for power management of sensors within a mobile device |
US8861415B2 (en) | 2009-11-26 | 2014-10-14 | Fraunhofer-Gesellschaft Zur Foerderung Der Angewandten Forschung E.V. | Data transmission device and a method for activating a data transmission |
WO2011064338A1 (en) * | 2009-11-26 | 2011-06-03 | Fraunhofer-Gesellschaft zur Förderung der angewandten Forschung e.V. | A data transmission apparatus and a method for activating a data transmission |
EP2704462A1 (en) * | 2011-04-27 | 2014-03-05 | Hitachi Industrial Equipment Systems Co., Ltd. | Wireless device and wireless network system |
EP2704462A4 (en) * | 2011-04-27 | 2015-04-22 | Hitachi Ind Equipment Sys | Wireless device and wireless network system |
US9379763B2 (en) | 2011-04-27 | 2016-06-28 | Hitachi Industrial Equipment Systems Co., Ltd. | Wireless device and wireless network system |
Also Published As
Publication number | Publication date |
---|---|
EP1510023A1 (en) | 2005-03-02 |
AU2003249633A1 (en) | 2003-12-02 |
EP1510023A4 (en) | 2010-04-14 |
Similar Documents
Publication | Publication Date | Title |
---|---|---|
US7209771B2 (en) | Battery powered wireless transceiver having LPRF component and second wake up receiver | |
US7155264B2 (en) | Systems and methods having LPRF device wake up using wireless tag | |
US7133704B2 (en) | Manufacture of LPRF device wake up using wireless tag | |
US7940717B2 (en) | Selective wake-up of data packet radio component using common designation communication | |
US7941095B2 (en) | LPRF device wake up using wireless tag | |
US7209468B2 (en) | Forming communication cluster of wireless AD HOC network based on common designation | |
US7221668B2 (en) | Communications within population of wireless transceivers based on common designation | |
US7733818B2 (en) | Intelligent node communication using network formation messages in a mobile Ad hoc network | |
US7830850B2 (en) | Class-switching in class-based data communcations network | |
US20080143484A1 (en) | Method in a wireless sensor reader for obtaining sensor data from a radio frequency addressable sensor | |
US20080212544A1 (en) | Method in a wireless sensor reader for obtaining sensor data from a radio frequency addressable sensor | |
WO2003098851A1 (en) | Lprf device wake up using wireless tag |
Legal Events
Date | Code | Title | Description |
---|---|---|---|
AK | Designated states |
Kind code of ref document: A1 Designated state(s): AE AG AL AM AT AU AZ BA BB BG BR BY BZ CA CH CN CO CR CU CZ DE DK DM DZ EC EE ES FI GB GD GE GH GM HR HU ID IL IN IS JP KE KG KP KR KZ LC LK LR LS LT LU LV MA MD MG MK MN MW MX MZ NI NO NZ OM PH PL PT RO RU SC SD SE SG SK SL TJ TM TN TR TT TZ UA UG US UZ VC VN YU ZA ZM ZW |
|
AL | Designated countries for regional patents |
Kind code of ref document: A1 Designated state(s): GH GM KE LS MW MZ SD SL SZ TZ UG ZM ZW AM AZ BY KG KZ MD RU TJ TM AT BE BG CH CY CZ DE DK EE ES FI FR GB GR HU IE IT LU MC NL PT RO SE SI SK TR BF BJ CF CG CI CM GA GN GQ GW ML MR NE SN TD TG |
|
121 | Ep: the epo has been informed by wipo that ep was designated in this application | ||
WWE | Wipo information: entry into national phase |
Ref document number: 10514336 Country of ref document: US Ref document number: 10987884 Country of ref document: US Ref document number: 10987964 Country of ref document: US |
|
WWE | Wipo information: entry into national phase |
Ref document number: 2003753022 Country of ref document: EP |
|
WWP | Wipo information: published in national office |
Ref document number: 2003753022 Country of ref document: EP |
|
NENP | Non-entry into the national phase |
Ref country code: JP |
|
WWW | Wipo information: withdrawn in national office |
Country of ref document: JP |