US20200053676A1 - Method and apparatus for dynamic media access control in a multiple access system - Google Patents
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- US20200053676A1 US20200053676A1 US16/658,409 US201916658409A US2020053676A1 US 20200053676 A1 US20200053676 A1 US 20200053676A1 US 201916658409 A US201916658409 A US 201916658409A US 2020053676 A1 US2020053676 A1 US 2020053676A1
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Definitions
- Certain embodiments of the invention relate to networking. More specifically, certain embodiments of the invention relate to a method and apparatus for dynamic media access control in a multiple access system.
- a system and/or method is provided for dynamic media access control in a multiple access system, substantially as illustrated by and/or described in connection with at least one of the figures, as set forth more completely in the claims.
- FIG. 1 depicts exemplary communication devices which may comprise a dynamically adaptable media access controller.
- FIG. 2 is a diagram illustrating aspects of the invention taking place at different layers of the OSI model.
- FIGS. 3A-3C are a flowchart illustrating the use of dynamic CSMA for communicating over a shared physical medium.
- FIG. 4A is a flowchart illustrating hold-state or idle-state operation of an electronic device.
- FIG. 4B is a flowchart illustrating receive-state operation of an electronic device.
- FIG. 5A is a flowchart illustrating the determination of guard time for a CSMA process based on a type of message to be transmitted.
- FIG. 5B is a flowchart illustrating the determination of guard time for a CSMA process based on a rate at which a message is to be transmitted.
- FIG. 5C is a flowchart illustrating the determination of guard time for a CSMA process based on a length of a message to be transmitted.
- FIGS. 6A-6D depict data structures which may be utilized for implementing dynamic media access control algorithms.
- FIG. 7 depicts an exemplary file system in a device comprising a dynamically adaptable media access controller.
- FIG. 8 is a flowchart illustrating exemplary steps for channel scanning in a device comprising a dynamically adaptable media access controller.
- FIG. 9 is a flowchart illustrating exemplary steps for beacon transmission by a device comprising a dynamically adaptable media access controller.
- FIGS. 10A-10C illustrate generation of parameters utilized by a dynamically adaptable media access controller.
- FIG. 11A illustrates the structure of an exemplary physical layer frame containing a first type of data link layer protocol data unit (PDU).
- PDU data link layer protocol data unit
- FIG. 11B illustrates the structure of an exemplary physical layer frame containing a second type of data link layer protocol data unit (PDU).
- PDU protocol data unit
- FIGS. 12A illustrates the structure of an exemplary first type of network-layer PDU.
- FIGS. 12B illustrates the structure of an exemplary second type of network-layer PDU.
- FIG. 13 depicts the structure of an exemplary transport-layer PDU.
- FIGS. 14A-14E depict the structure of exemplary portions of a transport-layer PDU.
- FIGS. 15A-15F depict the structure of exemplary portions of a transport-layer PDU.
- circuits and circuitry refer to physical electronic components (i.e. hardware) and any software and/or firmware (“code”) which may configure the hardware, be executed by the hardware, and or otherwise be associated with the hardware.
- code software and/or firmware
- and/or means any one or more of the items in the list joined by “and/or”.
- x and/or y means any element of the three-element set ⁇ (x), (y), (x, y) ⁇ .
- x, y, and/or z means any element of the seven-element set ⁇ (x), (y), (z), (x, y), (x, z), (y, z), (x, y, z) ⁇ .
- the terms “block” and “module” refer to functions than can be implemented in hardware, software, firmware, or any combination of one or more thereof.
- the term “exemplary” means serving as a non-limiting example, instance, or illustration.
- the terms “e.g.,” and “for example,” introduce a list of one or more non-limiting examples, instances, or illustrations.
- FIG. 1 depicts exemplary communication devices which may comprise a dynamically adaptable media access controller. Shown in FIG. 1 are details of an exemplary first device 102 and details of an exemplary second device 104 .
- the CPU 204 may comprise circuitry operable to control operation of the first device 102 .
- the CPU 204 may, for example, execute an operating system and/or other programs such (e.g., programs that enable a user interface of the device 102 ).
- the CPU 204 may generate one or more control signals for controlling the operation of the device 102 .
- the CPU 204 may, for example, control a mode of operation of the device 102 .
- the CPU 214 may comprise circuitry operable to control operation of the second device 104 .
- the CPU 214 may be substantially similar to the CPU 204 .
- the device 102 is less resource-constrained device, such as a base station or network controller
- the device 104 is more resource-constrained device, such as a battery-powered tag or a smartcard as described in above-incorporated U.S. patent application Serial No. 13/270,802
- the CPU 204 may be less-complex (e.g., comprise fewer gates, utilize less power, utilize less memory, etc.) than the CPU 214 .
- the CPU 204 may comprise a RISC or ARM processor, and the CPU 214 may comprise a state-machine having a relatively small number of states (e.g., four states).
- the radio 207 may comprise a processor 208 and an analog front-end (AFE) 209 .
- the processor 208 may comprise circuitry operable to interface with the AFE 209 to receive and transmit data, and to process received and to-be-transmitted data.
- the processor 208 may be operable to receive data from the CPU 204 and/or memory 206 , encode, packetize, and/or otherwise process the data to prepare it for transmission in accordance with one or more wireless protocols, and output the data to the AFE 209 for transmission.
- the processor 208 may be operable to receive data via the AFE 209 , process the received data and output received data to the memory 206 and/or the CPU 204 .
- Exemplary protocols which may be supported by the second device 104 include the ISO 18000-7 standard, and protocols described in the above-incorporated U.S. Provisional Patent Application Serial No. 61/464,376 filed on Mar. 2, 2011.
- the radio 217 may comprise a processor 218 and an analog front-end (AFE) 219 .
- the baseband processor 218 may comprise circuitry operable to interface with the AFE 219 to receive and transmit data, and to process received and to-be-transmitted data.
- the baseband processor 218 may be substantially similar to the baseband processor 208 .
- the baseband processor 218 may be less-complex (e.g., comprise fewer gates, utilize less power, utilize less memory, etc.) than the baseband processor 208 .
- the baseband processor 208 may be operable to implement more complex signal processing algorithms (e.g., FEC decoding) than the baseband processor 218 .
- the analog front-end (AFE) 209 may comprise circuitry suitable for processing received and/or to-be-transmitted data in the analog domain.
- the AFE 209 may receive digital data from the baseband processor 208 , process the data to generate corresponding RF signals, and output the RF signals to the antenna 210 .
- the AFE 209 may receive RF signals from the antenna 210 , process the RF signals to generate corresponding digital data, and output the digital data to the baseband processor 209 .
- the AFE 219 may be substantially similar to the AFE 209 .
- the AFE 219 may be less-complex (e.g., comprise fewer gates, utilize less power, utilize less memory, etc.) than the AFE 209 .
- the AFE 209 may comprise a more-sensitive receiver, a more powerful transmitter than the AFE 219 .
- Circuitry of the memory 206 may comprise one or more memory cells and may be operable to store data to the memory cell(s) and read data from the memory cell(s).
- the one or more memory cell may comprise one or more volatile memory cells and/or one or more non-volatile memory cells.
- the memory 206 may store data arranged, for example, as an indexed short file block (ISFB) and/or indexed short file series block (ISFSB) as described in the above-incorporated U.S. Provisional Patent Application Serial No. 61/464,376.
- Circuitry of the memory 216 may comprise one or more memory cells and may be operable to read data from the memory cell(s) and/or store data to the memory cell(s).
- the memory 216 may store data arranged, for example, as an indexed short file block (ISFB) and/or indexed short file series block (ISFSB) as described in the above-incorporated U.S. Provisional Patent Application Serial No. 61/464,376.
- the memory 216 may be substantially similar to the memory 206 .
- the memory 216 may be less-complex (e.g., comprise fewer gates, utilize less power, etc.) than the memory 206 .
- Each of the clocks 211 and 221 may be operable to generate one or more oscillating signals which may be utilized to control synchronous circuitry of the device 100 .
- Each of the clocks 211 and 221 may comprise, for example, one or more crystal oscillators, phase-locked loops, and/or direct digital synthesizers.
- Each of the clocks 211 and 221 may also comprise a “date/time” or “real-time” clock operable to keep track of time of day, day of week, day of month, month, and/or year.
- the interfaces 212 and 222 may enable configuring and/or programming the devices 102 and 104 , respectively.
- one or more values of one or more timing parameters may be programmed via the programming interfaces 212 and/or 222 .
- Each of the antennas 210 and 220 may be operable to transmit and receive electromagnetic signals in one or more frequency bands.
- the antennas 210 and 220 may be operable to transmit and receive signals in the ISM frequency band centered at 433.92 MHz.
- the device 102 may be, for example, a base station or network controller, and the device 104 may be a mobile device such as a smart phone or a smartcard.
- the devices 102 and 104 may communicate via the radios 207 and 217 .
- values of one or more media access control (MAC) parameters that control when and/or how to access the physical medium may be dynamic (i.e., configured “real-time” or “on-the-fly”).
- MAC media access control
- values of one or more MAC parameters may be changed on a per-message and/or per-dialog (an exchange of one or more logically-related messages) basis.
- Exemplary MAC parameters whose values may be dynamically determined include: which channel(s) to transmit and/or receive on, whether to utilize CSMA, how long to listen before transmitting, how long to listen after transmitting, and/or how long a channel must be free before transmitting on that channel.
- Parameter values may, for example, change based on the contents of a message received over the medium and/or based on instructions stored locally (e.g., in memory 216 for the device 104 ). Such instructions may, for example, be generated by an application and/or operating system running on the device 102 and/or 104 .
- FIG. 2 is a diagram illustrating aspects of the invention taking place at different layers of the OSI model.
- the device 104 may comprise: a congestion module 230 and/or a flow control module 232 which may operate at the transport layer (layer 4 of the OSI model); a carrier sense multiple access (CSMA) module 236 which may operate at the data link layer (layer 2 of the OSI model); and a received signal strength indicator (RSSI) module which may operate at the physical layer (layer 1 of the OSI model).
- the device 104 may also comprise a register 234 which may be readable and/or modifiable by the congestion control module 230 , the flow control module 232 , and/or the CSMA module 236 .
- the device 104 may receive a request message and decide to transmit a response message in reply to the request message.
- the congestion control module 230 may receive a parameter T CA0 , a parameter T G , a parameter CSMA_options, and a parameter ch_list.
- the parameters may be utilized directly in controlling access to the physical medium and/or utilized for determining values of other parameters which, in turn, may be utilized in controlling access to the physical medium.
- One or more of the parameters may have been received in, and/or derived from, information contained in the received request message. In this manner, the requesting device may control, at least in part, if, how, and/or when the responding device 104 transmits a response to the request.
- the parameter ch_list may comprise a list of channel identifiers, where each channel identifier is uniquely associated with a particular combination of center frequency and bandwidth.
- the list of channels may correspond to channels on which the requesting device (i.e., the device that sent the request message) will listen for responses.
- the congestion control module 230 may modify the parameter ch_list to generate ch_list' which may then be passed onto the CSMA module 236 .
- the modification of ch_list to generate ch_list' may be, for example, to remove one or more channels from the list because the device 104 is aware that the removed channel is highly congested, the device 104 does not support the channel, and/or for some other reason.
- the parameter T CA0 may correspond to the amount of time that the device 104 has to begin transmitting the response message onto the physical medium.
- T CA0 may correspond to T C ⁇ T resp , where the value of T C (“contention period” or “response timeout”) is the amount of time that the requesting device is going to listen for responses to the request message (T C may have been received in the request message), and T resp is the amount of time it will take the device 104 to transmit the response message.
- the parameter CSMA_options may indicate whether to utilize carrier sense (i.e., whether to “listen before talk”) and/or which equations and/or algorithms the device 104 should utilize for calculating values for one or more timing parameters utilized by the CSMA module 236 and/or the congestion control module 230 .
- Two exemplary parameters which may be calculated are T G ′ (“guard time) and T CA (“collision avoidance timeout”).
- T CA may be set equal to T CA0 for a first value of CSMA_options, but T CA may be set equal to T CA0 /2 for a second CSMA_options. Other factors may additionally or alternatively be used for calculating T CA .
- Such factors may comprise, for example, characteristics (e.g., type and/or length) of the response message, and/or characteristics (e.g., data rate, frequency, bandwidth, modulation type, and/or symbol rate) of the channel onto which the response message is to be transmitted.
- characteristics e.g., type and/or length
- characteristics e.g., data rate, frequency, bandwidth, modulation type, and/or symbol rate
- the congestion control module 230 may store the value of T CA in the register 234 .
- the parameter T G may be an initial value for a parameter T G ′ (“guard time”).
- T G ′ which may determine how long the device 104 must sense the physical medium as being inactive before the device 104 begins transmitting the response message onto the physical medium.
- Other factors in determining a value of T G ′ may include CSMA_options, T CA , T CA0 , characteristics (e.g., type and/or length) of the response message, and/or characteristics (e.g., data rate, frequency, bandwidth, modulation type, and/or symbol rate) of the channel onto which the response message is to be transmitted.
- the CSMA module 236 may perform CSMA as, for example, described below in reference to FIG. 3C . If an available channel is detected, the CSMA module 236 may assert TxEN and the flow control module 232 may then manage the transmission of the response packet onto the medium on the available channel. Upon TxEN being asserted, the flow control module 232 may modify the value stored in the register 234 . If, after trying for a period of time equal to T CA , none of the channels in the channel list are determined to be available, then, depending on the value of T CA , the device 104 may abort transmission of the response or may take a break and try again later.
- Factors in determining a value of T wait may include CSMA_options, T CA , T CA0 , characteristics (e.g., type and/or length) of the response message, and/or characteristics (e.g., data rate, frequency, bandwidth, modulation type, and/or symbol rate) of the channel onto which the response message is to be transmitted.
- characteristics e.g., type and/or length
- characteristics e.g., data rate, frequency, bandwidth, modulation type, and/or symbol rate
- FIGS. 3A-3C are a flowchart illustrating the use of dynamic CSMA for communicating over a shared physical medium.
- the exemplary steps begin with step 302 in which the device 102 generates a request message.
- the message may, for example, comprise a query template and seek responses from devices which possess certain characteristics and/or store certain data.
- the device 102 determines a value of one or more parameters that instruct devices receiving the request as to if, how, and/or when to send responses to the request message. For example, the device 102 may determine a value of T C (the amount of time it will listen for responses to the request), CSMA_options (a flag which indicates an equation and/or algorithm that responding devices should use when calculating values for certain timing parameters), and a list of one or more channels on which the device 102 will listen for responses.
- T C the amount of time it will listen for responses to the request
- CSMA_options a flag which indicates an equation and/or algorithm that responding devices should use when calculating values for certain timing parameters
- the device 102 may determine T C , CSMA_options, and/or the channel list based on, for example: the type of request, the symbol rate of the channel(s) over which the request will be transmitted and/or responses received, the results of past requests (e.g., knowledge about the devices that have responded to past requests), the location of the device 102 (e.g., based on received GPS signals, other wireless signals, and/or user input), the number or responses that are desired, and/or any other suitable criteria. For example, the device 102 may set T C to a larger value if it wants to receive many and/or long responses, and may set T C to a smaller value if it wants to receiver fewer and/or shorter responses.
- the device 102 inserts the value(s) of the one or more parameters calculated in step 304 into one or more fields of the request message.
- the device 102 transmits the request message.
- the device 102 may perform CSMA and transmit the request message only upon sensing that the medium is free.
- timing parameters utilized as part of the CSMA process may be the same as the values calculated for the potential response messages, or may be different.
- first values of timing parameters such as T CA and T G ′
- second values of timing parameters such as T CA and T G ′
- the device 102 may not sense whether another device is already transmitting because, for example, it may not care whether a collision occurs or may know (e.g., through scheduling) that the medium is free.
- the request message is received by the device 104 .
- the device 104 processes the received request message and decides to transmit a response message.
- the device 104 determine values of T CA and T G ′ to be utilized for transmitting the response message.
- the value of T CA for the response message may be calculated, for example, as described above with respect to FIG. 2 .
- the value of T G ′ for the response message be calculated as, for example, described below with respect to FIGS. 5A-5C .
- step 316 it is determined whether the value of T CA calculated in step 314 is compared to a threshold. If the value of T CA is less than a threshold (i.e., the requesting device will cease listening before the complete response message can be transmitted) then in step 318 , the device 104 aborts transmission of the response message.
- a threshold i.e., the requesting device will cease listening before the complete response message can be transmitted
- step 320 if the value of T CA is greater than the threshold, then, in step 320 , the congestion control module 230 triggers the CSMA process performed by the CSMA module 236 . In step 322 , the CSMA process described below with respect to FIG. 4B takes place. In step 324 , if transmission was successful (i.e., either CSMA was disabled or an available channel for transmitting the response message was detected during step 322 ), then the exemplary steps advance to step 330 . In step 330 , the flow control module 232 sets the T CA register 234 to a value guaranteed to be less than the threshold utilized in step 316 . For example, the flow control module 232 may set the T CA register 234 to a value of ⁇ 1.
- the congestion control module counts down an amount of time T wait .
- the value of T wait may be calculated based on variety of factors such as, for example, CSMA_options, T CA0 , T CA , T G ′, the length of the response message, the type (e.g., foreground or background) of the response message, the symbol rate at which the response message is to be transmitted, and/or a search score generated by comparing a received search token with locally stored data.
- the value stored in the T CA register 234 is updated.
- the value stored in the register 234 may be updated by subtracting off the amount of time that has elapsed since the value was calculated.
- a new value of T CA may be calculated based on, for example, CSMA_options, T G ,′ and/or on how much time is left in the contention period (the time period of duration T C during which the requesting device will listen for responses).
- step 342 if CSMA is disabled (i.e., the device 104 is configured to transmit onto the medium without first sensing whether another device is currently transmitting) then the steps advance to step 356 .
- the CSMA module 236 asserts TxEN.
- step 358 the message is transmitted by the flow control module 232 .
- a variable i is set to 1.
- the physical layer receiver of the device 104 is powered-up and configured to receive on the i th channel identified by the parameter ch_list′.
- the CSMA module 236 detects whether CS from the physical layer is asserted.
- the PHY may assert CS when the received signal strength is above a threshold.
- the threshold utilized by the RSSI module 238 may have been pre-configured by an administrator and/or configured dynamically based on, for example, past performance and/or based on information contained in the received request message.
- step 350 the CSMA module 236 waits for a period of time equal to T G ′.
- step 352 the CSMA module 236 again detects whether CS from the physical layer is asserted. If CS is not asserted then, in step 356 the CSMA module 236 asserts TxEN. In step 358 the flow control module 232 manages the transmission of the response message onto the physical medium.
- step 362 the variable i is incremented by 1.
- step 364 the value of T CA in register 236 is updated by subtracting off the amount of time that has elapsed since the register was last programmed.
- step 366 the updated value of T CA is compared to a threshold (i.e. it is determined whether there would still be time to transmit the response message before the contention period ends). If not, then in step 370 , TxEN remains deasserted and the steps advance to step 360 . If so, then in step 368 it is determined whether all channels in the channel list have been checked for availability. If not, then the exemplary steps return to step 346 . If all channels have been checked, then the exemplary steps advance to step 370 .
- FIG. 4A is a flowchart illustrating hold-state or idle-state operation of an electronic device.
- the exemplary steps begin with step 402 when the device 104 enters an idle or hold state of operation.
- the device 104 determines values of one or more MAC parameters such as, for example, Channel ID, scan duration (T SD ), and time-to-next-scan (T NS ).
- T SD scan duration
- T NS time-to-next-scan
- step 406 upon the triggering of a scan (e.g., based on a value of T NS and/or a real-time clock) a physical layer receiver of the device 104 is powered-up and configured to listen on the channel indicated by the value of Channel ID determined in step 404 .
- step 408 if the device listens for T SD without CS being asserted, then the exemplary steps advance to step 410 .
- step 410 the device 104 waits an amount of time equal to T NS before returning to step 404 .
- step 408 if CS is asserted before T SD times out, then the device 104 may transition to a receive state of operation as, for example, described with respect to FIG. 4B .
- FIG. 4B is a flowchart illustrating receive-state operation of an electronic device. The steps begin with step 414 when the device 104 enters a receive state of operation.
- the device may receive a number of bits which may constitute all or part of a frame.
- the device 104 may compare at least a portion of the received bits to one or more known values. The result of the comparison may indicate whether the bits received in step 418 were part of a valid frame and, if so, the type of frame. For example, a valid frame may begin with a plurality of bits that constitute a sync word. Accordingly, the device 104 may compare the initial plurality of bits to one or more known-good values of the sync word.
- the received bits may be discarded and the device returns to an idle or hold state of operation. If the initial plurality of bits is a valid sync word, then the exemplary steps advance to step 420 .
- the device may receive any remaining bits of the frame.
- the device 104 may parse one or more fields of the received frame to determine whether the device 104 was an intended recipient of the frame and/or whether the device 104 cares about the frame (i.e., wants to devote resources to further processing the message). Frames not intended for the device 104 and/or not of interest to the device 104 may be discarded without further processing.
- the steps may return to step 420 . If there are no additional frames to receive then in step 426 the device 104 may determine whether the received packet passes (i.e. is not dropped during) MAC filtering.
- the device 104 may return to step 408 in which it may re-evaluate T SD and reinitialize reception. If so, then the device 104 may transition to a transmit state (e.g., as described in portions of FIGS. 4A-4C ).
- FIG. 5A is a flowchart illustrating the determination of guard time for a CSMA process based on a type of message to be transmitted.
- the exemplary steps begin with step 502 when the device 104 has a frame to transmit.
- the device 104 may determine whether the frame to be transmitted is a first type of frame (e.g., a foreground frame) or a second type of frame (e.g., a background frame). If the frame is of the first type, then in step 506 T G ′ may be set to a first value. If the frame is of the first type, then in step 506 T G ′ may be set to a second value, which may be higher than the first value.
- a first type of frame e.g., a foreground frame
- a second type of frame e.g., a background frame
- FIG. 5B is a flowchart illustrating the determination of guard time for a CSMA process based on a symbol rate at which a message is to be transmitted.
- the exemplary steps begin with step 510 when the device 104 has a frame to transmit.
- the device 104 may determine whether the frame to be transmitted at a first symbol rate (e.g., 200 kS/s) or at a second symbol rate (e.g., 55.55 kS/s). If the frame is to be transmitted at the first symbol rate, then, in step 514 , T G ′ may be set to a first value. If the frame is to be transmitted at the second symbol rate, then in step 506 T G ′ may be set to a second value, which may be higher than the first value.
- a first symbol rate e.g. 200 kS/s
- a second symbol rate e.g., 55.55 kS/s
- FIG. 5C is a flowchart illustrating the determination of guard time for a CSMA process based on a length of a message to be transmitted.
- the exemplary steps begin with step 520 when the device 104 has a frame to transmit.
- the device 104 may determine whether the length of the frame to be transmitted is below or above a threshold. If the length of the frame is less than the threshold, then, in step 524 , T G ′ may be set to a first value. If the length of the frame is greater than the threshold, then, in step 526 , T G ′ may be set to a second value, which may be higher than the first value.
- FIGS. 5A-5C illustrate scenarios selecting between two values of T G ′
- values of T G ′ may be selected from a larger set of options such that T G ′ could be controlled with more granularity.
- FIGS. 6A-6D depict data structures which may be utilized for implementing dynamic media access control algorithms.
- a scan n-tuple (a four-tuple) 602 comprising a Channel ID field 604 1 , a scan type field 604 2 , a scan duration field 604 3 , and a time-to-next-scan field 604 4 .
- the Channel ID field 604 1 may indicate a frequency and/or bandwidth of a channel on which to listen for traffic.
- the scan type field 604 2 may determine the type of frame(s) to listen for (e.g., background or foreground frames).
- the scan duration field 604 3 may indicate how long to listen to the channel.
- the time-to-next scan field 604 4 may indicate how long to wait between listening to the channel identified in scan n-tuple 602 and listening to a channel identified in another scan n-tuple.
- FIG. 6B there is shown an exemplary sequence 606 of scan n-tuples 602 1 - 602 M , where M is an integer.
- M is an integer.
- Each of the scan n-tuples 602 1 - 602 M in the sequence 606 may be as described with respect to FIG. 6A .
- the device 104 may read the first scan n-tuple 602 1 , listen to the channel identified by field 604 1 of scan n-tuple 602 1 for the type of frame identified in field 604 2 of scan n-tuple 602 1 .
- the device 104 may begin counting-down the amount of time in field 604 4 while concurrently beginning listening for the amount of time in field 604 3 .
- the device 104 may read the next scan n-tuple 602 2 in the sequence 606 and operate accordingly, that is, enter a listen state followed by a wait state according to the fields of the scan n-tuple 602 2 .
- the device 104 may repeat this process until it has operated in accordance with each of the scan n-tuples 602 1 - 602 M .
- the device may return to the first n-tuple in the sequence 614 .
- a beacon n-tuple (a six-tuple) 610 comprising a Channel ID field 612 1 , a CSMA options field 612 2 , a pointer 612 3 , a contention period duration (T C ) field 612 4 , a redundancy count field 612 5 , and a time-to-next-beacon field 612 5 .
- the Channel ID field 612 1 may indicate a frequency and/or bandwidth of a channel on which to transmit a beacon.
- the CSMA options field 612 2 may indicate if responses should utilize CSMA when responding and, if so, how they should determine parameters for performing the CSMA.
- the pointer field 612 3 may point to a file or block of data that is to be transmitted as part of the beacon (e.g., transmitted as the payload of a frame).
- the contention period duration field 612 4 may indicate how long the device should listen for responses to the beacon.
- the redundancy count field 612 5 may indicate how many times the beacon transmission should be repeated.
- the time-to-next beacon field 612 6 may indicate how long to wait between transmitting the beacon described in beacon n-tuple 610 and transmitting a beacon described in another beacon n-tuple.
- FIG. 6D there is shown an exemplary sequence 614 of beacon n-tuples 610 1 - 610 M , where M is an integer.
- Each of the beacon n-tuples in the sequence 614 may be as described with respect to FIG. 6C .
- the device 104 may read the first beacon n-tuple 610 1 and transmit a beacon comprising: data pointed to by field 612 3 of n-tuple 610 1 ; and fields determined by field 612 3 of beacon n-tuple. The device may then listen for responses to the beacon for the amount of time indicated in field 612 4 of n-tuple 610 1 . The device may repeat the beacon up to the number of times in field 612 5 of n-tuple 610 1 until a response is received or until the amount of time T NB in field 612 6 of n-tuple 610 1 elapses.
- the device 104 may read the next n-tuple 610 2 in the sequence 614 and operate accordingly, that is, enter a transmit state followed by a listen state and/or a wait state according to the fields of the n-tuple 610 2 .
- the device 104 may repeat this process until it has operated in accordance with each of the n-tuples 610 1 - 610 M .
- the device may exit the beacon transmit mode of operation or may return to the first n-tuple in the sequence 614 .
- n-tuples, sequences, and states of operation described with respect to FIGS. 6A-6D are only exemplary. Other implementations in which channel scan and and/or transmit operations are controlled by one or more ordered sets of parameters will be understood from the foregoing and from inspection of the above-incorporated U.S. Provisional Patent Application Ser. No. 61/464,376.
- FIG. 7 depicts an exemplary file system in a device comprising a dynamically adaptable media access controller.
- the file system comprises a scan sequence 606 1 , a scan sequence 606 2 , a beacon transmit sequence 614 1 , a beacon transmit sequence 614 2 , portion 702 for storing media access control parameters, and a portion 704 for storing data.
- the file system may be, for example, the same as or similar to the indexed short file block (IFSB) described in the above-incorporated U.S. Provisional Patent Application Ser. No. 61/464,376.
- IFSB indexed short file block
- the sequences 606 1 and 606 2 may be instances of the sequence 606 described in FIG. 6B . Which of the sequences 606 1 and 606 2 is utilized for scanning at any particular time may depend on a variety of factors such as, for example: where the device is located, time of day/week/month/year, type(s) of device(s) to be communicated with, number of devices to be communicated with, types of messages to be listened for, time since last transmit and/or receive activity, etc.
- the sequence 606 1 may be utilized when the device is in an idle state of operation and the sequence 606 2 may be utilized when the device is in a hold state of operation.
- the sequence 606 1 may be utilized when the device is operating in a first location and the sequence 606 2 may be utilized when the device is operating in a second location
- the sequences 614 1 and 614 2 may be instances of the sequence 614 described in FIG. 6D . Which of the sequences 614 1 and 614 2 is utilized for transmitting beacons at any particular time may depend on a variety of factors such as, for example: where the device is located, time of day/week/month/year, type(s) of device(s) to be communicated with, number of devices to be communicated with, types of data to be sent in the beacons, etc.
- the sequence 606 1 may be utilized when transmitting beacons intended for a first type of device and the sequence 606 2 may be utilized when transmitting beacons intended for a second type of device.
- the sequence 606 1 may be utilized when transmitting beacons in a first location and the sequence 606 2 may be utilized when transmitting beacons in a second location.
- the portion 702 may store values of one or more parameters such as, for example, parameters which configure the congestion control module 230 , the flow control module 232 , the CSMA module 236 , and/or the RSSI module 238 .
- parameters may, for example, be programmed into the portion 702 by a system administrator and/or may be configured based on received request messages.
- the portion 704 may store data as, for example, described with reference to the indexed short file block (ISFB), the indexed short file series block (ISFSB), and/or the generic file block (GFB) described in the above-incorporated U.S. Provisional Patent Application Ser. No. 61/464,376.
- ISFB indexed short file block
- ISFSB indexed short file series block
- GFB generic file block
- FIG. 8 is a flowchart illustrating exemplary steps for channel scanning in a device comprising a dynamically adaptable media access controller.
- the exemplary steps begin with step 802 in which a scan sequence is triggered in the device 104 .
- the scan sequence may be triggered by, for example, a real-time clock reaching a predetermined value.
- a variable i is set to 1 .
- the device 104 gets an n-tuple 602 1 .
- the n-tuple 602 1 may be, for example, input via the programming interface 222 and/or read from the memory 216 .
- one or more configuration registers or variables for performing a channel scan may be set to the values in the n-tuple 602 1 .
- the Channel ID for scan i may be set to value of the Channel ID field 604 1 of the n-tuple 602 1
- the scan type for scan i may be set to the value of the scan type field 604 2 of the n-tuple 602 1
- the scan duration for the scan i may be set to the value of the scan duration field 604 3 of the n-tuple 602 1
- the time-to-next-scan value for the scan i may be set to the value of the time-to-next scan field 604 4 of the n-tuple 602 1 .
- the PHY of the device 104 may be configured according to the Channel ID. That is, the center frequency and bandwidth of the receiver may be configured according to the Channel ID.
- the device 104 may listen for a sync word that corresponds to the scan type of the scan i. If the scan duration elapses, and/or if the received signal strength on the channel being scanned goes below a threshold value (which may be configurable), without receiving the sync word, then in step 813 the device 104 may wait for the remainder of T NS , which may have started counting in step 806 or 808 (e.g., if 100 milliseconds have elapsed since the n-tuple 602 1 was retrieved, then the device may wait for T NS ⁇ 100 ms in step 813 ).
- a threshold value which may be configurable
- step 814 it may be determined whether i has reached a maximum value.
- the maximum value of i may be, for example, M+1 (where M is the number of n-tuples in the sequence 606 ). If i has not reached its maximum value, then, in step 816 , i may be incremented and the steps may return to step 806 .
- step 818 the scan sequence may be complete.
- the device 104 may, for example, begin a new scan sequence, begin a beacon transmit sequence, or go into a sleep mode.
- step 820 the device 104 will receive one or more frames and, in step 822 , process the received frame(s). If in step 822 one or more of the received frames are dropped during MAC filtering, step 812 may be resumed.
- FIG. 9 is a flowchart illustrating exemplary steps for beacon transmission by a device comprising a dynamically adaptable media access controller.
- the exemplary steps begin with step 902 in which a beacon transmit sequence is triggered in the device 104 .
- the scan sequence may be triggered by, for example, a real-time clock reaching a predetermined value.
- a variable i is set to 1.
- the device 104 gets an n-tuple 610 1 .
- the n-tuple 610 1 may be, for example, input via the programming interface 222 and/or read from the memory 216 .
- one or configuration registers or variables for performing a channel scan may be set to the values in the n-tuple 610 1 .
- the Channel ID for beacon i may be set to value of the Channel ID field 612 1 of the n-tuple 610 1 ;
- CSMA options for responses to beacon i may be set to the CSMA options field 612 2 of the n-tuple 610 1 ;
- the data transmitted in beacon i may be the data pointed to by the pointer field 612 3 of the n-tuple 610 1 ;
- the amount of time the device 104 listens for responses to beacon i may be the value in the contention period duration (T C ) field 612 4 of the n-tuple 610 1 ;
- R the maximum number of times that the device 104 repeats transmission of the beacon i, may be set to the value of the redundancy count field 612 5 of the n-tuple 610 1 ;
- T NB the time at which the device 104
- step 912 the beacon i is transmitted onto the physical medium.
- the device 104 may listen for a response for up to T C .
- step 916 the value R may be decremented by 1 and, in step 918 , if R is greater than zero, then the steps may return to step 912 .
- step 920 the device may wait for the remainder of T NB , which may have started counting in step 906 or 908 (e.g., if 100 milliseconds have elapsed since the n-tuple 602 1 was retrieved, then the device may wait for T NB ⁇ 100 ms in step 920 ).
- step 922 it may be determined whether i has reached a maximum value. The maximum value of i may be, for example, the number of n-tuples in a sequence 614 . If i has not reached its maximum value and no acknowledgement was detected in step 914 , then, in step 924 , i may be incremented and the steps may return to step 906 .
- the beacon transmit sequence may be complete.
- the device 104 may, for example, begin a new beacon transmit sequence, begin a scan sequence, or go into a sleep mode.
- FIGS. 10A-10C illustrate generation of parameters utilized by a dynamically adaptable media access controller.
- a device such as device 104 , may comprise a parameter generation module 1002 which may be operable to configuring media access control in the device 104 based on a high-level input from, for example, an application or operating system of the device 104 (e.g., via an application programming interface).
- the parameter generation module 1002 in response to a request to implement a first MAC protocol, the parameter generation module 1002 generates a set of parameter values 1004 which may be utilized by, for example, the congestion control module 232 , the flow control module 234 , and/or the CSMA module 236 .
- the parameter generation module 1002 in response to a request to implement a second MAC protocol, the parameter generation module 1002 generates a set of parameter values 1006 which may be utilized by, for example, the congestion control module 232 , the flow control module 234 , and/or the CSMA module 236 .
- the parameter values to realize the first and second MAC protocols were static. Some MAC protocols, however, may require the periodic or continual (e.g., at or near real-time) updating of values of the parameters.
- a third MAC protocol is implemented by alternating between a set of parameter values 1008 and a set of parameter values 1010 .
- time and/or frequency division multiple access protocols may be implemented in the device 104 simply through intelligent control of one or more parameter values.
- Such protocols could include, for example, media access control utilized in IEEE 802.11 and IEEE 802.15.4.
- FIG. 11A illustrates the structure of an exemplary physical layer frame containing a first type of data link layer protocol data unit (PDU).
- the physical layer frame comprises a preamble, a sync word, and a payload.
- the payload comprises a data link layer (OSI layer 2) PDU, in this case, a background frame.
- the background frame comprises a subnet field, a background protocol ID (BPID) field, and CRC field.
- the payload comprises a background protocol ID (BPID) field and protocol data.
- the protocol data comprises a channel ID field and an estimated time of arrival (ETA) field if the background protocol is the advertising protocol.
- the protocol data comprises a reservation type field and a reservation duration field if the background protocol is the reservation protocol.
- FIG. 11B illustrates the structure of an exemplary physical layer frame containing a second type of data link layer protocol data unit (PDU).
- the physical layer frame comprises a preamble, a sync word, and a payload.
- the payload comprises a data link layer (OSI layer 2) PDU, in this case, a foreground frame.
- the foreground frame comprises a length field, a headers field, a payload, a footer, and a cyclic redundancy check field.
- the payload may comprise a network layer (OSI layer 3) PDU.
- OSI layer 3 network layer
- the headers field comprises TxEIRP field, a subnet field, a frame control field, a data link layer security (DLLS) code, DLLS initialization data, a dialog identifier, a flags field, a source ID, and a target ID.
- the frame control field comprises a listen flag, a DLLS flag, an enable addressing flag, a frame continuity flag, a CRC32 flag, a not mode 2 flag, and a mode 2 frame type flag.
- the flags field comprises an addressing option flag, a virtual ID flag, a network layer security flag, and application flags.
- FIGS. 12A illustrates the structure of an exemplary first type of network-layer PDU.
- the enable addressing field of the layer 2 PDU indicates that the PDU contained in the payload of the layer 2 PDU is a mode 2 datastream protocol (M2DP) PDU.
- the payload of the layer 2 PDU comprises a frame ID field and a M2DP payload.
- FIGS. 12B illustrates the structure of an exemplary second type of network layer PDU.
- the enable addressing field of the layer 2 PDU indicates that the PDU contained in the payload of the layer 2 PDU is a mode 2 network protocol (M2NP) PDU.
- the payload of the layer 2 PDU comprises a mode 2 network layer security (M2NLS) code, M2NLS initialization data, a target address, a hop control field, a hop extension field, an origin device ID, a destination device ID, a M2NP payload, and M2NP authentication data.
- the M2NP payload may contain a layer 4 PDU.
- the hop control field comprises hop extension flag, an Origin ID flag, a Destination ID flag, origin/destination virtual ID flag, and a hops remaining field.
- FIG. 13 depicts the structure of an exemplary transport-layer PDU.
- the transport protocol associated with the PDU in FIG. 13 is the mode 2 query protocol (M2QP).
- M2QP PDU (“command”) comprises a command code field, a command control field, and may comprise one or more of a dialog template, an ack template, a global query template, a local query template, an error template, and a command data template.
- the command code field comprises an extension flag, a command type field, and an M2QP opcode.
- the command extension field comprises a collision avoidance (CA) type field, a no CSMA flag, and a no response flag.
- CA collision avoidance
- FIGS. 14A-14E depict the structure of exemplary portions of a transport-layer PDU.
- the dialog template comprises a response timeout field, a response channel list length field, and a response channel list.
- the ack template comprises a number of ack fields and an ack device IDs field.
- the query template comprises a compare length field, a compare code field, a compare mask field, and a compare value field.
- the compare code field may comprise a mask enable flag, a comparison type field, and a comparison parameters field.
- the error template comprises an error code field, an error subcode field, an M2QP error data field, and an extended error data field.
- FIG. 14A the dialog template comprises a response timeout field, a response channel list length field, and a response channel list.
- the ack template comprises a number of ack fields and an ack device IDs field.
- the query template comprises a compare length field, a compare code field, a compare mask field, and a compare value field.
- the command data template comprises one or more of a comparison template, a call template, a return template, and command-specific data which is the data indicated by the one or more present comparison, call, and/or return templates.
- the various templates of the command data template are described below with respect to FIGS. 15A-15F .
- FIGS. 15A-15F depict the structure of exemplary portions of a transport-layer PDU.
- the comparison template comprises a comparison file ID and a comparison byte offset.
- the comparison template comprises a comparison series ID and a comparison byte offset.
- the call template comprises a max returned bytes field, a return file ID, and a return file entry offset.
- the call template comprises a max returned bytes field, a series ID, and a file series data offset.
- the return template comprises a return file ID, a file offset, an IFSB total length, and file data.
- the return template comprises a series ID, a series length, a file series data offset, a file series total data length, one or more file IDs, one or more file lengths, and a file series data starting offset.
- an electronic device 104 may be operable to control access to a physical medium (e.g., airwaves, a copper cable, or an optical fiber) utilizing carrier sense multiple access (CSMA).
- CSMA carrier sense multiple access
- the amount of time that the electronic device 104 must sense the physical medium as being inactive before it permits transmission of a message onto the physical medium may be determined based on: the size of the message, the type of the message, the symbol rate at which the message is to be transmitted, and/or a channel onto which the message is to be transmitted.
- how long and/or how many times the electronic device attempts to transmit the message may be based the size of the message, the type of the message, the symbol rate at which the message is to be transmitted, and/or a channel onto which the message is to be transmitted.
- the message may be in response to a request received by the electronic device via the physical medium, and the channel onto which the message is to be transmitted may be determined based on a field (e.g., Response Channel List) of the received request.
- the field of the received request may comprises a list of channels, and the electronic device 104 may sequentially listen to channels in the list until a channel meeting certain requirements (e.g., signal strength below a threshold for at least a period of time T G ′) is found or until a timeout occurs (e.g., T CA has elapsed since a CSMA process was initiated or T C has elapsed since the request was sent).
- the maximum amount of time that the electronic device 104 attempts to transmit the message onto the physical medium may be determined based on a field (e.g., Response timeout) of the received request message. While the message is pending transmission, a portion of the electronic device 104 may alternate between a listen state and a wait state, wherein the amount of time in one or both of the listen state and the wait state may be determined based on one or more fields (e.g., Response timeout and/or CA type) of the received request. Additionally or alternatively, the one or more fields of the received request may determine an equation and/or algorithm utilized by the electronic device for the determining the amount of time spent in one or both of the listen state and the wait state.
- a field e.g., Response timeout
- the electronic device 104 may comprise memory and a receiver and may be operable to: read a series of n-tuples from the memory, each of the n-tuple comprising a channel identifier, a scan duration value, and a time-to-next-scan value. For each of the read n-tuples, the device 104 may be operable to: configure the receiver to receive on the channel associated with the channel identifier for an amount of time equal to the scan duration value; and power-down the receiver for an amount of time equal to the time-to-next-scan value minus the scan duration value.
- the electronic device 104 may comprise a memory, a transmitter, and a receiver and may be operable to read a series of n-tuples from the memory, each of the n-tuple comprising a channel identifier, a contention period value, and a time-to-next-scan value.
- the device 104 may be operable to: configure the transmitter to transmit a beacon on the channel associated with the channel identifier; configure the receiver to listen for a response to the beacon for an amount of time equal to the contention period value; and wait a period of time equal to the time-to-next-scan value minus the contention period value before operating based on the next n-tuple in the series of n-tuples.
- inventions may provide a non-transitory computer readable medium and/or storage medium, and/or a non-transitory machine readable medium and/or storage medium, having stored thereon, a machine code and/or a computer program having at least one code section executable by a machine and/or a computer, thereby causing the machine and/or computer to perform the steps as described herein for dynamic media access control in a multiple access system.
- the present invention may be realized in hardware, software, or a combination of hardware and software.
- the present invention may be realized in a centralized fashion in at least one computing system, or in a distributed fashion where different elements are spread across several interconnected computing systems. Any kind of computing system or other apparatus adapted for carrying out the methods described herein is suited.
- a typical combination of hardware and software may be a general-purpose computing system with a program or other code that, when being loaded and executed, controls the computing system such that it carries out the methods described herein.
- Another typical implementation may comprise an application specific integrated circuit or chip.
- the present invention may also be embedded in a computer program product, which comprises all the features enabling the implementation of the methods described herein, and which when loaded in a computer system is able to carry out these methods.
- Computer program in the present context means any expression, in any language, code or notation, of a set of instructions intended to cause a system having an information processing capability to perform a particular function either directly or after either or both of the following: a) conversion to another language, code or notation; b) reproduction in a different material form.
Abstract
An electronic device may be operable to control access to a physical medium (e.g., airwaves, a copper cable, or an optical fiber) utilizing carrier sense multiple access (CSMA). The amount of time that the electronic device must sense the physical medium as being inactive before it permits transmission of a message onto the physical medium may be determined based on: the size of the message, the type of the message, the symbol rate at which the message is to be transmitted, and/or a channel onto which the message is to be transmitted. Similarly, other aspects of how and when electronic device transmits and/or receives on the physical medium may be controlled via one or more dynamically configurable parameters which may be configured based on characteristics of received and/or to-be-transmitted messages.
Description
- This patent application is a continuation of U.S. patent application Ser. No. 16/290,605, filed on Mar. 1, 2019, which is a continuation of U.S. patent application Ser. No. 16/038,430, filed on Jul. 18, 2016, which is a continuation of U.S. patent application Ser. No. 15/200,265, filed on Jul. 1, 2016, which is a continuation of U.S. patent application Ser. No. 14/943,661, filed on Nov. 17, 2015, which is a continuation of U.S. patent application Ser. No. 13/408,453, filed on Feb. 29, 2012, which makes reference to, claims priority to and claims benefit from U.S. Provisional Patent Application Ser. No. 61/464,376, entitled “Advanced Communication System for Wide-area Low Power Wireless Applications and Active RFID” and filed on Mar. 2, 2011. Each of the above identified applications is hereby incorporated herein by reference in its entirety.
- This patent application also makes reference to:
- U.S. Provisional Patent Application Ser. No. 61/464,376, entitled “Advanced Communication System for Wide-Area Low Power Wireless Applications and Active RFID” and filed on Mar. 2, 2011;
- U.S. Provisional Patent Application Ser. No. 61/572,390, entitled “System for Adding Dash7-Based Applications Capability to a Smartphone” and filed on Jul. 15, 2011;
- U.S. patent application Ser. No. 13/267,640, entitled “Method and Apparatus for Adaptive Searching of Distributed Datasets” and filed on Oct. 6, 2011;
- U.S. patent application Ser. No. 13/267,621, entitled “Method and Apparatus for Low-Power, Long-Range Networking” and filed on Oct. 6, 2011;
- U.S. patent application Ser. No. 13/270,802, entitled “Method and Apparatus for a Multi-band, Multi-mode Smartcard” and filed on Oct. 11, 2011;
- U.S. patent application Ser. No. 13/270,959, entitled “Method and Apparatus for an Integrated Antenna” and filed on Oct. 11, 2011;
- U.S. patent application Ser. No. 13/289,054, entitled “Method and Apparatus for Electronic Payment” and filed on Nov. 4, 2011;
- U.S. patent application Ser. No. 13/289,050 filed on Nov. 4, 2011;
- U.S. patent application Ser. No. 13/297,348, entitled “Method and Apparatus for Interfacing with a Smartcard” and filed on Nov. 16, 2011;
- U.S. patent application Ser. No. 13/354,513, entitled “Method and Apparatus for Memory Management” and filed on Jan. 20, 2012;
- U.S. patent application Ser. No. 13/354,615, entitled “Method and Apparatus for Discovering, People, Products, and/or Services via a Localized Wireless Network” and filed on Jan. 20, 2012;
- U.S. patent application Ser. No. 13/396,708, entitled “Method and apparatus for Plug and Play, Networkable ISO 18000-7 Connectivity” and filed on Feb. 15, 2012;
- U.S. patent application Ser. No. 13/396,739, entitled “Method and Apparatus for Serving Advertisements in a Low-Power Wireless Network” and filed on Feb. 15, 2012;
- U.S. patent application Ser. No. 13/408,440, entitled “Method and Apparatus for Forward Error Correction (FEC) in a Resource-Constrained Network” and filed on Feb. 29, 2012;
- U.S. patent application Ser. No. 13/408,447, entitled “Method and Apparatus for Adaptive Traffic Management in a Resource-Constrained Network” and filed on Feb. 29, 2012;
- U.S. patent application Ser. No. 13/408,457, entitled “Method and Apparatus for Rapid Group Synchronization” and filed on Feb. 29, 2012;
- U.S. patent application Ser. No. 13/408,461, entitled “Method and Apparatus for Addressing in a Resource-Constrained Network” and filed on Feb. 29, 2012;
- U.S. patent application Ser. No. 13/408,464, entitled “Method and Apparatus for Query-Based Congestion Control” and filed on Feb. 29, 2012; and
- U.S. patent application Ser. No. 13/408,466, entitled “Method and Apparatus for Power Autoscaling in a Resource-Constrained Network” and filed on Feb. 29, 2012.
- Each of the above-referenced applications is hereby incorporated herein by reference in its entirety.
- Certain embodiments of the invention relate to networking. More specifically, certain embodiments of the invention relate to a method and apparatus for dynamic media access control in a multiple access system.
- Existing methods of media access control for a shared communication medium are often inefficient. Further limitations and disadvantages of conventional and traditional approaches will become apparent to one of skill in the art, through comparison of such systems with some aspects of the present invention as set forth in the remainder of the present application with reference to the drawings.
- A system and/or method is provided for dynamic media access control in a multiple access system, substantially as illustrated by and/or described in connection with at least one of the figures, as set forth more completely in the claims.
- These and other advantages, aspects and novel features of the present invention, as well as details of an illustrated embodiment thereof, will be more fully understood from the following description and drawings.
-
FIG. 1 depicts exemplary communication devices which may comprise a dynamically adaptable media access controller. -
FIG. 2 is a diagram illustrating aspects of the invention taking place at different layers of the OSI model. -
FIGS. 3A-3C are a flowchart illustrating the use of dynamic CSMA for communicating over a shared physical medium. -
FIG. 4A is a flowchart illustrating hold-state or idle-state operation of an electronic device. -
FIG. 4B is a flowchart illustrating receive-state operation of an electronic device. -
FIG. 5A is a flowchart illustrating the determination of guard time for a CSMA process based on a type of message to be transmitted. -
FIG. 5B is a flowchart illustrating the determination of guard time for a CSMA process based on a rate at which a message is to be transmitted. -
FIG. 5C is a flowchart illustrating the determination of guard time for a CSMA process based on a length of a message to be transmitted. -
FIGS. 6A-6D depict data structures which may be utilized for implementing dynamic media access control algorithms. -
FIG. 7 depicts an exemplary file system in a device comprising a dynamically adaptable media access controller. -
FIG. 8 is a flowchart illustrating exemplary steps for channel scanning in a device comprising a dynamically adaptable media access controller. -
FIG. 9 is a flowchart illustrating exemplary steps for beacon transmission by a device comprising a dynamically adaptable media access controller. -
FIGS. 10A-10C illustrate generation of parameters utilized by a dynamically adaptable media access controller. -
FIG. 11A illustrates the structure of an exemplary physical layer frame containing a first type of data link layer protocol data unit (PDU). -
FIG. 11B illustrates the structure of an exemplary physical layer frame containing a second type of data link layer protocol data unit (PDU). -
FIGS. 12A illustrates the structure of an exemplary first type of network-layer PDU. -
FIGS. 12B illustrates the structure of an exemplary second type of network-layer PDU. -
FIG. 13 depicts the structure of an exemplary transport-layer PDU. -
FIGS. 14A-14E depict the structure of exemplary portions of a transport-layer PDU. -
FIGS. 15A-15F depict the structure of exemplary portions of a transport-layer PDU. - As utilized herein the terms “circuits” and “circuitry” refer to physical electronic components (i.e. hardware) and any software and/or firmware (“code”) which may configure the hardware, be executed by the hardware, and or otherwise be associated with the hardware. As utilized herein, “and/or” means any one or more of the items in the list joined by “and/or”. As an example, “x and/or y” means any element of the three-element set {(x), (y), (x, y)}. As another example, “x, y, and/or z” means any element of the seven-element set {(x), (y), (z), (x, y), (x, z), (y, z), (x, y, z)}. As utilized herein, the terms “block” and “module” refer to functions than can be implemented in hardware, software, firmware, or any combination of one or more thereof. As utilized herein, the term “exemplary” means serving as a non-limiting example, instance, or illustration. As utilized herein, the terms “e.g.,” and “for example,” introduce a list of one or more non-limiting examples, instances, or illustrations.
-
FIG. 1 depicts exemplary communication devices which may comprise a dynamically adaptable media access controller. Shown inFIG. 1 are details of an exemplaryfirst device 102 and details of an exemplarysecond device 104. - The
CPU 204 may comprise circuitry operable to control operation of thefirst device 102. TheCPU 204 may, for example, execute an operating system and/or other programs such (e.g., programs that enable a user interface of the device 102). TheCPU 204 may generate one or more control signals for controlling the operation of thedevice 102. TheCPU 204 may, for example, control a mode of operation of thedevice 102. - The
CPU 214 may comprise circuitry operable to control operation of thesecond device 104. In some instances, theCPU 214 may be substantially similar to theCPU 204. In instances that thedevice 102 is less resource-constrained device, such as a base station or network controller, and thedevice 104 is more resource-constrained device, such as a battery-powered tag or a smartcard as described in above-incorporated U.S. patent application Serial No. 13/270,802, theCPU 204 may be less-complex (e.g., comprise fewer gates, utilize less power, utilize less memory, etc.) than theCPU 214. In one embodiment, for example, theCPU 204 may comprise a RISC or ARM processor, and theCPU 214 may comprise a state-machine having a relatively small number of states (e.g., four states). - The
radio 207 may comprise aprocessor 208 and an analog front-end (AFE) 209. Theprocessor 208 may comprise circuitry operable to interface with theAFE 209 to receive and transmit data, and to process received and to-be-transmitted data. For transmission, theprocessor 208 may be operable to receive data from theCPU 204 and/ormemory 206, encode, packetize, and/or otherwise process the data to prepare it for transmission in accordance with one or more wireless protocols, and output the data to theAFE 209 for transmission. For reception, theprocessor 208 may be operable to receive data via theAFE 209, process the received data and output received data to thememory 206 and/or theCPU 204. Exemplary protocols which may be supported by thesecond device 104 include the ISO 18000-7 standard, and protocols described in the above-incorporated U.S. Provisional Patent Application Serial No. 61/464,376 filed on Mar. 2, 2011. - The
radio 217 may comprise aprocessor 218 and an analog front-end (AFE) 219. Thebaseband processor 218 may comprise circuitry operable to interface with theAFE 219 to receive and transmit data, and to process received and to-be-transmitted data. In some instances, thebaseband processor 218 may be substantially similar to thebaseband processor 208. In instances that thedevice 102 is less-resource-constrained device, such as a base station or network controller, and thedevice 104 is a more-resource-constrained device, such as a battery-powered tag, thebaseband processor 218 may be less-complex (e.g., comprise fewer gates, utilize less power, utilize less memory, etc.) than thebaseband processor 208. In one embodiment, for example, thebaseband processor 208 may be operable to implement more complex signal processing algorithms (e.g., FEC decoding) than thebaseband processor 218. - The analog front-end (AFE) 209 may comprise circuitry suitable for processing received and/or to-be-transmitted data in the analog domain. For transmission, the
AFE 209 may receive digital data from thebaseband processor 208, process the data to generate corresponding RF signals, and output the RF signals to theantenna 210. For reception, theAFE 209 may receive RF signals from theantenna 210, process the RF signals to generate corresponding digital data, and output the digital data to thebaseband processor 209. In some instances, theAFE 219 may be substantially similar to theAFE 209. In instances that thedevice 102 is less-resource-constrained device, such as a base station or network controller, and thedevice 104 is a more-resource-constrained device, such as a battery-powered tag, theAFE 219 may be less-complex (e.g., comprise fewer gates, utilize less power, utilize less memory, etc.) than theAFE 209. In one embodiment, for example, theAFE 209 may comprise a more-sensitive receiver, a more powerful transmitter than theAFE 219. - Circuitry of the
memory 206 may comprise one or more memory cells and may be operable to store data to the memory cell(s) and read data from the memory cell(s). The one or more memory cell may comprise one or more volatile memory cells and/or one or more non-volatile memory cells. Thememory 206 may store data arranged, for example, as an indexed short file block (ISFB) and/or indexed short file series block (ISFSB) as described in the above-incorporated U.S. Provisional Patent Application Serial No. 61/464,376. - Circuitry of the
memory 216 may comprise one or more memory cells and may be operable to read data from the memory cell(s) and/or store data to the memory cell(s). Thememory 216 may store data arranged, for example, as an indexed short file block (ISFB) and/or indexed short file series block (ISFSB) as described in the above-incorporated U.S. Provisional Patent Application Serial No. 61/464,376. In some instances, thememory 216 may be substantially similar to thememory 206. In instances that thedevice 104 is resource-constrained, thememory 216 may be less-complex (e.g., comprise fewer gates, utilize less power, etc.) than thememory 206. - Each of the
clocks clocks clocks - The
interfaces devices - Each of the
antennas antennas - In operation, the
device 102 may be, for example, a base station or network controller, and thedevice 104 may be a mobile device such as a smart phone or a smartcard. Thedevices radios memory 216 for the device 104). Such instructions may, for example, be generated by an application and/or operating system running on thedevice 102 and/or 104. -
FIG. 2 is a diagram illustrating aspects of the invention taking place at different layers of the OSI model. As shown inFIG. 2 , thedevice 104 may comprise: acongestion module 230 and/or aflow control module 232 which may operate at the transport layer (layer 4 of the OSI model); a carrier sense multiple access (CSMA)module 236 which may operate at the data link layer (layer 2 of the OSI model); and a received signal strength indicator (RSSI) module which may operate at the physical layer (layer 1 of the OSI model). Thedevice 104 may also comprise aregister 234 which may be readable and/or modifiable by thecongestion control module 230, theflow control module 232, and/or theCSMA module 236. - In operation, the
device 104 may receive a request message and decide to transmit a response message in reply to the request message. For the transmission of the response message, thecongestion control module 230 may receive a parameter TCA0, a parameter TG, a parameter CSMA_options, and a parameter ch_list. The parameters may be utilized directly in controlling access to the physical medium and/or utilized for determining values of other parameters which, in turn, may be utilized in controlling access to the physical medium. One or more of the parameters may have been received in, and/or derived from, information contained in the received request message. In this manner, the requesting device may control, at least in part, if, how, and/or when the respondingdevice 104 transmits a response to the request. - The parameter ch_list may comprise a list of channel identifiers, where each channel identifier is uniquely associated with a particular combination of center frequency and bandwidth. The list of channels may correspond to channels on which the requesting device (i.e., the device that sent the request message) will listen for responses. The
congestion control module 230 may modify the parameter ch_list to generate ch_list' which may then be passed onto theCSMA module 236. The modification of ch_list to generate ch_list' may be, for example, to remove one or more channels from the list because thedevice 104 is aware that the removed channel is highly congested, thedevice 104 does not support the channel, and/or for some other reason. - The parameter TCA0 may correspond to the amount of time that the
device 104 has to begin transmitting the response message onto the physical medium. In an exemplary embodiment, TCA0 may correspond to TC−Tresp, where the value of TC (“contention period” or “response timeout”) is the amount of time that the requesting device is going to listen for responses to the request message (TC may have been received in the request message), and Tresp is the amount of time it will take thedevice 104 to transmit the response message. - The parameter CSMA_options may indicate whether to utilize carrier sense (i.e., whether to “listen before talk”) and/or which equations and/or algorithms the
device 104 should utilize for calculating values for one or more timing parameters utilized by theCSMA module 236 and/or thecongestion control module 230. Two exemplary parameters which may be calculated are TG′ (“guard time) and TCA (“collision avoidance timeout”). To illustrate, in an exemplary embodiment, TCA may be set equal to TCA0 for a first value of CSMA_options, but TCA may be set equal to TCA0/2 for a second CSMA_options. Other factors may additionally or alternatively be used for calculating TCA. Such factors may comprise, for example, characteristics (e.g., type and/or length) of the response message, and/or characteristics (e.g., data rate, frequency, bandwidth, modulation type, and/or symbol rate) of the channel onto which the response message is to be transmitted. After calculating TCA, thecongestion control module 230 may store the value of TCA in theregister 234. - The parameter TG may be an initial value for a parameter TG′ (“guard time”). TG′ which may determine how long the
device 104 must sense the physical medium as being inactive before thedevice 104 begins transmitting the response message onto the physical medium. Other factors in determining a value of TG′ may include CSMA_options, TCA, TCA0, characteristics (e.g., type and/or length) of the response message, and/or characteristics (e.g., data rate, frequency, bandwidth, modulation type, and/or symbol rate) of the channel onto which the response message is to be transmitted. - Upon initialization from the
congestion control module 230, theCSMA module 236 may perform CSMA as, for example, described below in reference toFIG. 3C . If an available channel is detected, theCSMA module 236 may assert TxEN and theflow control module 232 may then manage the transmission of the response packet onto the medium on the available channel. Upon TxEN being asserted, theflow control module 232 may modify the value stored in theregister 234. If, after trying for a period of time equal to TCA, none of the channels in the channel list are determined to be available, then, depending on the value of TCA, thedevice 104 may abort transmission of the response or may take a break and try again later. For example, if the congestion control module sets TCA=TCA0 then upon the CSMA failing to obtain access to the medium for a period of time TCA, thedevice 104 may abort transmission of the response message. Conversely, if TCA<TCA0, then thecongestion control module 230 may wait for a period of time Twait, and then trigger theCSMA module 236 to once again attempt to gain access to the medium. The second attempt may last for up to a period of time equal to TCA0−TCA−Twait. Factors in determining a value of Twait may include CSMA_options, TCA, TCA0, characteristics (e.g., type and/or length) of the response message, and/or characteristics (e.g., data rate, frequency, bandwidth, modulation type, and/or symbol rate) of the channel onto which the response message is to be transmitted. -
FIGS. 3A-3C are a flowchart illustrating the use of dynamic CSMA for communicating over a shared physical medium. Referring toFIG. 3A , the exemplary steps begin withstep 302 in which thedevice 102 generates a request message. The message may, for example, comprise a query template and seek responses from devices which possess certain characteristics and/or store certain data. - In
step 304, thedevice 102 determines a value of one or more parameters that instruct devices receiving the request as to if, how, and/or when to send responses to the request message. For example, thedevice 102 may determine a value of TC (the amount of time it will listen for responses to the request), CSMA_options (a flag which indicates an equation and/or algorithm that responding devices should use when calculating values for certain timing parameters), and a list of one or more channels on which thedevice 102 will listen for responses. Thedevice 102 may determine TC, CSMA_options, and/or the channel list based on, for example: the type of request, the symbol rate of the channel(s) over which the request will be transmitted and/or responses received, the results of past requests (e.g., knowledge about the devices that have responded to past requests), the location of the device 102 (e.g., based on received GPS signals, other wireless signals, and/or user input), the number or responses that are desired, and/or any other suitable criteria. For example, thedevice 102 may set TC to a larger value if it wants to receive many and/or long responses, and may set TC to a smaller value if it wants to receiver fewer and/or shorter responses. - In
step 306, thedevice 102 inserts the value(s) of the one or more parameters calculated instep 304 into one or more fields of the request message. Instep 308, thedevice 102 transmits the request message. In an exemplary embodiment, thedevice 102 may perform CSMA and transmit the request message only upon sensing that the medium is free. In such instances, timing parameters utilized as part of the CSMA process may be the same as the values calculated for the potential response messages, or may be different. For example, first values of timing parameters, such as TCA and TG′, may be utilized when transmitting request messages whereas second values of timing parameters, such as TCA and TG′, may be utilized when transmitting response messages. In another exemplary embodiment, for request messages, thedevice 102 may not sense whether another device is already transmitting because, for example, it may not care whether a collision occurs or may know (e.g., through scheduling) that the medium is free. - In
step 310, the request message is received by thedevice 104. In step 312, thedevice 104 processes the received request message and decides to transmit a response message. Instep 314, thedevice 104 determine values of TCA and TG′ to be utilized for transmitting the response message. The value of TCA for the response message may be calculated, for example, as described above with respect toFIG. 2 . The value of TG′ for the response message be calculated as, for example, described below with respect toFIGS. 5A-5C . - Referring now to
FIG. 3B , instep 316 it is determined whether the value of TCA calculated instep 314 is compared to a threshold. If the value of TCA is less than a threshold (i.e., the requesting device will cease listening before the complete response message can be transmitted) then instep 318, thedevice 104 aborts transmission of the response message. - Returning to step 316, if the value of TCA is greater than the threshold, then, in
step 320, thecongestion control module 230 triggers the CSMA process performed by theCSMA module 236. Instep 322, the CSMA process described below with respect toFIG. 4B takes place. Instep 324, if transmission was successful (i.e., either CSMA was disabled or an available channel for transmitting the response message was detected during step 322), then the exemplary steps advance to step 330. Instep 330, theflow control module 232 sets the TCA register 234 to a value guaranteed to be less than the threshold utilized instep 316. For example, theflow control module 232 may set the TCA register 234 to a value of −1. - Returning to step 324, if the
step 322 did not result in a successful transmission, then the exemplary steps advance to step 326. Instep 326, the congestion control module counts down an amount of time Twait. The value of Twait may be calculated based on variety of factors such as, for example, CSMA_options, TCA0, TCA, TG′, the length of the response message, the type (e.g., foreground or background) of the response message, the symbol rate at which the response message is to be transmitted, and/or a search score generated by comparing a received search token with locally stored data. - In
step 328, the value stored in the TCA register 234 is updated. In an exemplary embodiment, the value stored in theregister 234 may be updated by subtracting off the amount of time that has elapsed since the value was calculated. In another exemplary embodiment, a new value of TCA may be calculated based on, for example, CSMA_options, TG,′ and/or on how much time is left in the contention period (the time period of duration TC during which the requesting device will listen for responses). - Referring now to
FIG. 3C , instep 342, if CSMA is disabled (i.e., thedevice 104 is configured to transmit onto the medium without first sensing whether another device is currently transmitting) then the steps advance to step 356. Instep 356, theCSMA module 236 asserts TxEN. Instep 358 the message is transmitted by theflow control module 232. - Returning to step 342, if CSMA is enabled, then in
step 344, a variable i is set to 1. Instep 346, the physical layer receiver of thedevice 104 is powered-up and configured to receive on the ith channel identified by the parameter ch_list′. Instep 348, theCSMA module 236 detects whether CS from the physical layer is asserted. The PHY may assert CS when the received signal strength is above a threshold. The threshold utilized by theRSSI module 238 may have been pre-configured by an administrator and/or configured dynamically based on, for example, past performance and/or based on information contained in the received request message. If CS is not asserted, then instep 350, theCSMA module 236 waits for a period of time equal to TG′. Instep 352, theCSMA module 236 again detects whether CS from the physical layer is asserted. If CS is not asserted then, instep 356 theCSMA module 236 asserts TxEN. Instep 358 theflow control module 232 manages the transmission of the response message onto the physical medium. - Returning to
steps step 362, the variable i is incremented by 1. Instep 364, the value of TCA inregister 236 is updated by subtracting off the amount of time that has elapsed since the register was last programmed. Instep 366, the updated value of TCA is compared to a threshold (i.e. it is determined whether there would still be time to transmit the response message before the contention period ends). If not, then instep 370, TxEN remains deasserted and the steps advance to step 360. If so, then instep 368 it is determined whether all channels in the channel list have been checked for availability. If not, then the exemplary steps return to step 346. If all channels have been checked, then the exemplary steps advance to step 370. -
FIG. 4A is a flowchart illustrating hold-state or idle-state operation of an electronic device. The exemplary steps begin withstep 402 when thedevice 104 enters an idle or hold state of operation. Instep 404, thedevice 104 determines values of one or more MAC parameters such as, for example, Channel ID, scan duration (TSD), and time-to-next-scan (TNS). Instep 406, upon the triggering of a scan (e.g., based on a value of TNS and/or a real-time clock) a physical layer receiver of thedevice 104 is powered-up and configured to listen on the channel indicated by the value of Channel ID determined instep 404. Instep 408, if the device listens for TSD without CS being asserted, then the exemplary steps advance to step 410. Instep 410, thedevice 104 waits an amount of time equal to TNS before returning to step 404. On the other hand, instep 408, if CS is asserted before TSD times out, then thedevice 104 may transition to a receive state of operation as, for example, described with respect toFIG. 4B . -
FIG. 4B is a flowchart illustrating receive-state operation of an electronic device. The steps begin withstep 414 when thedevice 104 enters a receive state of operation. Instep 416 the device may receive a number of bits which may constitute all or part of a frame. Instep 418, thedevice 104 may compare at least a portion of the received bits to one or more known values. The result of the comparison may indicate whether the bits received instep 418 were part of a valid frame and, if so, the type of frame. For example, a valid frame may begin with a plurality of bits that constitute a sync word. Accordingly, thedevice 104 may compare the initial plurality of bits to one or more known-good values of the sync word. If the initial plurality of bits is not a valid sync word, then the received bits may be discarded and the device returns to an idle or hold state of operation. If the initial plurality of bits is a valid sync word, then the exemplary steps advance to step 420. - In
step 420, the device may receive any remaining bits of the frame. Instep 422, thedevice 104 may parse one or more fields of the received frame to determine whether thedevice 104 was an intended recipient of the frame and/or whether thedevice 104 cares about the frame (i.e., wants to devote resources to further processing the message). Frames not intended for thedevice 104 and/or not of interest to thedevice 104 may be discarded without further processing. Instep 424, if there are additional frames to be received then the steps may return to step 420. If there are no additional frames to receive then instep 426 thedevice 104 may determine whether the received packet passes (i.e. is not dropped during) MAC filtering. If not, then thedevice 104 may return to step 408 in which it may re-evaluate TSD and reinitialize reception. If so, then thedevice 104 may transition to a transmit state (e.g., as described in portions ofFIGS. 4A-4C ). -
FIG. 5A is a flowchart illustrating the determination of guard time for a CSMA process based on a type of message to be transmitted. The exemplary steps begin withstep 502 when thedevice 104 has a frame to transmit. Instep 504 thedevice 104 may determine whether the frame to be transmitted is a first type of frame (e.g., a foreground frame) or a second type of frame (e.g., a background frame). If the frame is of the first type, then in step 506 TG′ may be set to a first value. If the frame is of the first type, then in step 506 TG′ may be set to a second value, which may be higher than the first value. -
FIG. 5B is a flowchart illustrating the determination of guard time for a CSMA process based on a symbol rate at which a message is to be transmitted. The exemplary steps begin withstep 510 when thedevice 104 has a frame to transmit. Instep 512 thedevice 104 may determine whether the frame to be transmitted at a first symbol rate (e.g., 200 kS/s) or at a second symbol rate (e.g., 55.55 kS/s). If the frame is to be transmitted at the first symbol rate, then, instep 514, TG′ may be set to a first value. If the frame is to be transmitted at the second symbol rate, then in step 506 TG′ may be set to a second value, which may be higher than the first value. -
FIG. 5C is a flowchart illustrating the determination of guard time for a CSMA process based on a length of a message to be transmitted. The exemplary steps begin withstep 520 when thedevice 104 has a frame to transmit. Instep 522 thedevice 104 may determine whether the length of the frame to be transmitted is below or above a threshold. If the length of the frame is less than the threshold, then, instep 524, TG′ may be set to a first value. If the length of the frame is greater than the threshold, then, instep 526, TG′ may be set to a second value, which may be higher than the first value. - Although
FIGS. 5A-5C illustrate scenarios selecting between two values of TG′, in practice values of TG′ may be selected from a larger set of options such that TG′ could be controlled with more granularity. -
FIGS. 6A-6D depict data structures which may be utilized for implementing dynamic media access control algorithms. - Referring to
FIG. 6A , there is shown a scan n-tuple (a four-tuple) 602 comprising a Channel ID field 604 1, a scan type field 604 2, a scan duration field 604 3, and a time-to-next-scan field 604 4. The Channel ID field 604 1 may indicate a frequency and/or bandwidth of a channel on which to listen for traffic. The scan type field 604 2 may determine the type of frame(s) to listen for (e.g., background or foreground frames). The scan duration field 604 3 may indicate how long to listen to the channel. The time-to-next scan field 604 4 may indicate how long to wait between listening to the channel identified in scan n-tuple 602 and listening to a channel identified in another scan n-tuple. - Referring to
FIG. 6B , there is shown anexemplary sequence 606 of scan n-tuples 602 1-602 M, where M is an integer. Each of the scan n-tuples 602 1-602 M in thesequence 606 may be as described with respect toFIG. 6A . - In operation, upon entering an idle state of operation (e.g., at a time triggered by a real-time clock), the
device 104 may read the first scan n-tuple 602 1, listen to the channel identified by field 604 1 of scan n-tuple 602 1 for the type of frame identified in field 604 2 of scan n-tuple 602 1. Thedevice 104 may begin counting-down the amount of time in field 604 4 while concurrently beginning listening for the amount of time in field 604 3. After the longer of these two time fields expires, thedevice 104 may read the next scan n-tuple 602 2 in thesequence 606 and operate accordingly, that is, enter a listen state followed by a wait state according to the fields of the scan n-tuple 602 2. Thedevice 104 may repeat this process until it has operated in accordance with each of the scan n-tuples 602 1-602 M. After completing the scan described in the last n-tuple of thesequence 606, the device may return to the first n-tuple in thesequence 614. - Referring to
FIG. 6C , there is shown a beacon n-tuple (a six-tuple) 610 comprising a Channel ID field 612 1, a CSMA options field 612 2, a pointer 612 3, a contention period duration (TC) field 612 4, a redundancy count field 612 5, and a time-to-next-beacon field 612 5. The Channel ID field 612 1 may indicate a frequency and/or bandwidth of a channel on which to transmit a beacon. The CSMA options field 612 2 may indicate if responses should utilize CSMA when responding and, if so, how they should determine parameters for performing the CSMA. The pointer field 612 3 may point to a file or block of data that is to be transmitted as part of the beacon (e.g., transmitted as the payload of a frame). The contention period duration field 612 4 may indicate how long the device should listen for responses to the beacon. The redundancy count field 612 5 may indicate how many times the beacon transmission should be repeated. The time-to-next beacon field 612 6 may indicate how long to wait between transmitting the beacon described in beacon n-tuple 610 and transmitting a beacon described in another beacon n-tuple. - Referring to
FIG. 6D , there is shown anexemplary sequence 614 of beacon n-tuples 610 1-610 M, where M is an integer. Each of the beacon n-tuples in thesequence 614 may be as described with respect toFIG. 6C . - In operation, upon entering a beacon transmit state of operation (e.g., at a time triggered by a real-time clock), the
device 104 may read the first beacon n-tuple 610 1 and transmit a beacon comprising: data pointed to by field 612 3 of n-tuple 610 1; and fields determined by field 612 3 of beacon n-tuple. The device may then listen for responses to the beacon for the amount of time indicated in field 612 4 of n-tuple 610 1. The device may repeat the beacon up to the number of times in field 612 5 of n-tuple 610 1 until a response is received or until the amount of time TNB in field 612 6 of n-tuple 610 1 elapses. After a response is received, or TNB elapses, thedevice 104 may read the next n-tuple 610 2 in thesequence 614 and operate accordingly, that is, enter a transmit state followed by a listen state and/or a wait state according to the fields of the n-tuple 610 2. Thedevice 104 may repeat this process until it has operated in accordance with each of the n-tuples 610 1-610 M. After completing beacon transmission in accordance with the last n-tuple in thesequence 614, the device may exit the beacon transmit mode of operation or may return to the first n-tuple in thesequence 614. - The n-tuples, sequences, and states of operation described with respect to
FIGS. 6A-6D are only exemplary. Other implementations in which channel scan and and/or transmit operations are controlled by one or more ordered sets of parameters will be understood from the foregoing and from inspection of the above-incorporated U.S. Provisional Patent Application Ser. No. 61/464,376. -
FIG. 7 depicts an exemplary file system in a device comprising a dynamically adaptable media access controller. The file system comprises ascan sequence 606 1, ascan sequence 606 2, a beacon transmitsequence 614 1, a beacon transmitsequence 614 2,portion 702 for storing media access control parameters, and a portion 704 for storing data. The file system may be, for example, the same as or similar to the indexed short file block (IFSB) described in the above-incorporated U.S. Provisional Patent Application Ser. No. 61/464,376. - The
sequences sequence 606 described inFIG. 6B . Which of thesequences sequence 606 1 may be utilized when the device is in an idle state of operation and thesequence 606 2 may be utilized when the device is in a hold state of operation. In an exemplary embodiment, thesequence 606 1 may be utilized when the device is operating in a first location and thesequence 606 2 may be utilized when the device is operating in a second location - The
sequences sequence 614 described inFIG. 6D . Which of thesequences sequence 606 1 may be utilized when transmitting beacons intended for a first type of device and thesequence 606 2 may be utilized when transmitting beacons intended for a second type of device. In an exemplary embodiment, thesequence 606 1 may be utilized when transmitting beacons in a first location and thesequence 606 2 may be utilized when transmitting beacons in a second location. - The
portion 702 may store values of one or more parameters such as, for example, parameters which configure thecongestion control module 230, theflow control module 232, theCSMA module 236, and/or theRSSI module 238. Such parameters may, for example, be programmed into theportion 702 by a system administrator and/or may be configured based on received request messages. - The portion 704 may store data as, for example, described with reference to the indexed short file block (ISFB), the indexed short file series block (ISFSB), and/or the generic file block (GFB) described in the above-incorporated U.S. Provisional Patent Application Ser. No. 61/464,376.
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FIG. 8 is a flowchart illustrating exemplary steps for channel scanning in a device comprising a dynamically adaptable media access controller. The exemplary steps begin withstep 802 in which a scan sequence is triggered in thedevice 104. The scan sequence may be triggered by, for example, a real-time clock reaching a predetermined value. Instep 804, a variable i is set to 1. Instep 806, thedevice 104 gets an n-tuple 602 1. The n-tuple 602 1 may be, for example, input via theprogramming interface 222 and/or read from thememory 216. Instep 808, one or more configuration registers or variables for performing a channel scan may be set to the values in the n-tuple 602 1. For example, the Channel ID for scan i may be set to value of the Channel ID field 604 1 of the n-tuple 602 1, the scan type for scan i may be set to the value of the scan type field 604 2 of the n-tuple 602 1, the scan duration for the scan i may be set to the value of the scan duration field 604 3 of the n-tuple 602 1, and the time-to-next-scan value for the scan i may be set to the value of the time-to-next scan field 604 4 of the n-tuple 602 1. - In step 810, the PHY of the
device 104 may be configured according to the Channel ID. That is, the center frequency and bandwidth of the receiver may be configured according to the Channel ID. - In
step 812, thedevice 104 may listen for a sync word that corresponds to the scan type of the scan i. If the scan duration elapses, and/or if the received signal strength on the channel being scanned goes below a threshold value (which may be configurable), without receiving the sync word, then instep 813 thedevice 104 may wait for the remainder of TNS, which may have started counting instep 806 or 808 (e.g., if 100 milliseconds have elapsed since the n-tuple 602 1 was retrieved, then the device may wait for TNS−100 ms in step 813). - In
step 814 it may be determined whether i has reached a maximum value. The maximum value of i may be, for example, M+1 (where M is the number of n-tuples in the sequence 606). If i has not reached its maximum value, then, instep 816, i may be incremented and the steps may return to step 806. - Returning to step 814, if i has reached its maximum value, then in
step 818 the scan sequence may be complete. Upon completing the scan sequence, thedevice 104 may, for example, begin a new scan sequence, begin a beacon transmit sequence, or go into a sleep mode. - Returning to step 812, if a sync word of the type being listened for is received before the scan duration times out, then in
step 820 thedevice 104 will receive one or more frames and, instep 822, process the received frame(s). If instep 822 one or more of the received frames are dropped during MAC filtering,step 812 may be resumed. -
FIG. 9 is a flowchart illustrating exemplary steps for beacon transmission by a device comprising a dynamically adaptable media access controller. The exemplary steps begin withstep 902 in which a beacon transmit sequence is triggered in thedevice 104. The scan sequence may be triggered by, for example, a real-time clock reaching a predetermined value. Instep 904, a variable i is set to 1. Instep 906, thedevice 104 gets an n-tuple 610 1. The n-tuple 610 1 may be, for example, input via theprogramming interface 222 and/or read from thememory 216. Instep 908, one or configuration registers or variables for performing a channel scan may be set to the values in the n-tuple 610 1. For example, the Channel ID for beacon i may be set to value of the Channel ID field 612 1 of the n-tuple 610 1; CSMA options for responses to beacon i may be set to the CSMA options field 612 2 of the n-tuple 610 1; the data transmitted in beacon i may be the data pointed to by the pointer field 612 3 of the n-tuple 610 1; the amount of time thedevice 104 listens for responses to beacon i may be the value in the contention period duration (TC) field 612 4 of the n-tuple 610 1; R, the maximum number of times that thedevice 104 repeats transmission of the beacon i, may be set to the value of the redundancy count field 612 5 of the n-tuple 610 1; and TNB, the time at which thedevice 104 transmits beacon i+1 may be set to the value of the time-to-next-beacon field 612 5 of the n-tuple 610 1. Instep 912, the beacon i is transmitted onto the physical medium. Instep 914, thedevice 104 may listen for a response for up to TC. Instep 916, the value R may be decremented by 1 and, instep 918, if R is greater than zero, then the steps may return to step 912. - Returning to step 918, if R is less than or equal to zero, then in
step 920 the device may wait for the remainder of TNB, which may have started counting instep 906 or 908 (e.g., if 100 milliseconds have elapsed since the n-tuple 602 1 was retrieved, then the device may wait for TNB−100 ms in step 920). Instep 922, it may be determined whether i has reached a maximum value. The maximum value of i may be, for example, the number of n-tuples in asequence 614. If i has not reached its maximum value and no acknowledgement was detected instep 914, then, instep 924, i may be incremented and the steps may return to step 906. - Returning to step 922, if i has reached its maximum value, then in
step 926 the beacon transmit sequence may be complete. Upon completing the beacon transmit sequence, thedevice 104 may, for example, begin a new beacon transmit sequence, begin a scan sequence, or go into a sleep mode. -
FIGS. 10A-10C illustrate generation of parameters utilized by a dynamically adaptable media access controller. A device, such asdevice 104, may comprise aparameter generation module 1002 which may be operable to configuring media access control in thedevice 104 based on a high-level input from, for example, an application or operating system of the device 104 (e.g., via an application programming interface). - Referring to
FIG. 10A , in response to a request to implement a first MAC protocol, theparameter generation module 1002 generates a set ofparameter values 1004 which may be utilized by, for example, thecongestion control module 232, theflow control module 234, and/or theCSMA module 236. - Referring to
FIG. 10B , in response to a request to implement a second MAC protocol, theparameter generation module 1002 generates a set ofparameter values 1006 which may be utilized by, for example, thecongestion control module 232, theflow control module 234, and/or theCSMA module 236. - In
FIGS. 10A and 10B , the parameter values to realize the first and second MAC protocols were static. Some MAC protocols, however, may require the periodic or continual (e.g., at or near real-time) updating of values of the parameters. For example, inFIG. 10C , a third MAC protocol is implemented by alternating between a set ofparameter values 1008 and a set of parameter values 1010. - Thus, as illustrated in
FIGS. 10A-10C , a variety of time and/or frequency division multiple access protocols may be implemented in thedevice 104 simply through intelligent control of one or more parameter values. Such protocols could include, for example, media access control utilized in IEEE 802.11 and IEEE 802.15.4. -
FIG. 11A illustrates the structure of an exemplary physical layer frame containing a first type of data link layer protocol data unit (PDU). The physical layer frame comprises a preamble, a sync word, and a payload. The payload comprises a data link layer (OSI layer 2) PDU, in this case, a background frame. The background frame comprises a subnet field, a background protocol ID (BPID) field, and CRC field. The payload comprises a background protocol ID (BPID) field and protocol data. The protocol data comprises a channel ID field and an estimated time of arrival (ETA) field if the background protocol is the advertising protocol. The protocol data comprises a reservation type field and a reservation duration field if the background protocol is the reservation protocol. -
FIG. 11B illustrates the structure of an exemplary physical layer frame containing a second type of data link layer protocol data unit (PDU). The physical layer frame comprises a preamble, a sync word, and a payload. The payload comprises a data link layer (OSI layer 2) PDU, in this case, a foreground frame. The foreground frame comprises a length field, a headers field, a payload, a footer, and a cyclic redundancy check field. The payload may comprise a network layer (OSI layer 3) PDU. The headers field comprises TxEIRP field, a subnet field, a frame control field, a data link layer security (DLLS) code, DLLS initialization data, a dialog identifier, a flags field, a source ID, and a target ID. The frame control field comprises a listen flag, a DLLS flag, an enable addressing flag, a frame continuity flag, a CRC32 flag, a notmode 2 flag, and amode 2 frame type flag. The flags field comprises an addressing option flag, a virtual ID flag, a network layer security flag, and application flags. -
FIGS. 12A illustrates the structure of an exemplary first type of network-layer PDU. InFIG. 12A , the enable addressing field of thelayer 2 PDU indicates that the PDU contained in the payload of thelayer 2 PDU is amode 2 datastream protocol (M2DP) PDU. Specifically, the payload of thelayer 2 PDU comprises a frame ID field and a M2DP payload. -
FIGS. 12B illustrates the structure of an exemplary second type of network layer PDU. InFIG. 12B , the enable addressing field of thelayer 2 PDU indicates that the PDU contained in the payload of thelayer 2 PDU is amode 2 network protocol (M2NP) PDU. Specifically, the payload of thelayer 2 PDU comprises amode 2 network layer security (M2NLS) code, M2NLS initialization data, a target address, a hop control field, a hop extension field, an origin device ID, a destination device ID, a M2NP payload, and M2NP authentication data. The M2NP payload may contain a layer 4 PDU. The hop control field comprises hop extension flag, an Origin ID flag, a Destination ID flag, origin/destination virtual ID flag, and a hops remaining field. -
FIG. 13 depicts the structure of an exemplary transport-layer PDU. The transport protocol associated with the PDU inFIG. 13 is themode 2 query protocol (M2QP). The M2QP PDU (“command”) comprises a command code field, a command control field, and may comprise one or more of a dialog template, an ack template, a global query template, a local query template, an error template, and a command data template. The command code field comprises an extension flag, a command type field, and an M2QP opcode. The command extension field comprises a collision avoidance (CA) type field, a no CSMA flag, and a no response flag. The structures of the various templates are described with respect toFIGS. 14A-14E . -
FIGS. 14A-14E depict the structure of exemplary portions of a transport-layer PDU. InFIG. 14A , the dialog template comprises a response timeout field, a response channel list length field, and a response channel list. InFIG. 14B , the ack template comprises a number of ack fields and an ack device IDs field. InFIG. 14C , the query template comprises a compare length field, a compare code field, a compare mask field, and a compare value field. The compare code field may comprise a mask enable flag, a comparison type field, and a comparison parameters field. InFIG. 14D , the error template comprises an error code field, an error subcode field, an M2QP error data field, and an extended error data field. InFIG. 14E , the command data template comprises one or more of a comparison template, a call template, a return template, and command-specific data which is the data indicated by the one or more present comparison, call, and/or return templates. The various templates of the command data template are described below with respect toFIGS. 15A-15F . -
FIGS. 15A-15F depict the structure of exemplary portions of a transport-layer PDU. InFIG. 15A , for an M2QP opcode that indicates file, the comparison template comprises a comparison file ID and a comparison byte offset. InFIG. 15B , for an M2QP opcode that indicates series, the comparison template comprises a comparison series ID and a comparison byte offset. InFIG. 15C , for an M2QP opcode that indicates file, the call template comprises a max returned bytes field, a return file ID, and a return file entry offset. InFIG. 15D , for an M2QP opcode that indicates series, the call template comprises a max returned bytes field, a series ID, and a file series data offset. InFIG. 15E , for an M2QP opcode that indicates file, the return template comprises a return file ID, a file offset, an IFSB total length, and file data. InFIG. 15F , for an M2QP opcode that indicates series, the return template comprises a series ID, a series length, a file series data offset, a file series total data length, one or more file IDs, one or more file lengths, and a file series data starting offset. - Additional details of the frames and fields described above with respect to
FIGS. 11A-15F are described in the above-incorporated U.S. Provisional Patent Application Ser. No. 61/464,376. - In accordance with various aspects of the present invention, an
electronic device 104 may be operable to control access to a physical medium (e.g., airwaves, a copper cable, or an optical fiber) utilizing carrier sense multiple access (CSMA). The amount of time that theelectronic device 104 must sense the physical medium as being inactive before it permits transmission of a message onto the physical medium may be determined based on: the size of the message, the type of the message, the symbol rate at which the message is to be transmitted, and/or a channel onto which the message is to be transmitted. Similarly, how long and/or how many times the electronic device attempts to transmit the message may be based the size of the message, the type of the message, the symbol rate at which the message is to be transmitted, and/or a channel onto which the message is to be transmitted. - The message may be in response to a request received by the electronic device via the physical medium, and the channel onto which the message is to be transmitted may be determined based on a field (e.g., Response Channel List) of the received request. The field of the received request may comprises a list of channels, and the
electronic device 104 may sequentially listen to channels in the list until a channel meeting certain requirements (e.g., signal strength below a threshold for at least a period of time TG′) is found or until a timeout occurs (e.g., TCA has elapsed since a CSMA process was initiated or TC has elapsed since the request was sent). The maximum amount of time that theelectronic device 104 attempts to transmit the message onto the physical medium may be determined based on a field (e.g., Response timeout) of the received request message. While the message is pending transmission, a portion of theelectronic device 104 may alternate between a listen state and a wait state, wherein the amount of time in one or both of the listen state and the wait state may be determined based on one or more fields (e.g., Response timeout and/or CA type) of the received request. Additionally or alternatively, the one or more fields of the received request may determine an equation and/or algorithm utilized by the electronic device for the determining the amount of time spent in one or both of the listen state and the wait state. - The
electronic device 104 may comprise memory and a receiver and may be operable to: read a series of n-tuples from the memory, each of the n-tuple comprising a channel identifier, a scan duration value, and a time-to-next-scan value. For each of the read n-tuples, thedevice 104 may be operable to: configure the receiver to receive on the channel associated with the channel identifier for an amount of time equal to the scan duration value; and power-down the receiver for an amount of time equal to the time-to-next-scan value minus the scan duration value. - The
electronic device 104 may comprise a memory, a transmitter, and a receiver and may be operable to read a series of n-tuples from the memory, each of the n-tuple comprising a channel identifier, a contention period value, and a time-to-next-scan value. For each of the read n-tuples, thedevice 104 may be operable to: configure the transmitter to transmit a beacon on the channel associated with the channel identifier; configure the receiver to listen for a response to the beacon for an amount of time equal to the contention period value; and wait a period of time equal to the time-to-next-scan value minus the contention period value before operating based on the next n-tuple in the series of n-tuples. - Other embodiments of the invention may provide a non-transitory computer readable medium and/or storage medium, and/or a non-transitory machine readable medium and/or storage medium, having stored thereon, a machine code and/or a computer program having at least one code section executable by a machine and/or a computer, thereby causing the machine and/or computer to perform the steps as described herein for dynamic media access control in a multiple access system.
- Accordingly, the present invention may be realized in hardware, software, or a combination of hardware and software. The present invention may be realized in a centralized fashion in at least one computing system, or in a distributed fashion where different elements are spread across several interconnected computing systems. Any kind of computing system or other apparatus adapted for carrying out the methods described herein is suited. A typical combination of hardware and software may be a general-purpose computing system with a program or other code that, when being loaded and executed, controls the computing system such that it carries out the methods described herein. Another typical implementation may comprise an application specific integrated circuit or chip.
- The present invention may also be embedded in a computer program product, which comprises all the features enabling the implementation of the methods described herein, and which when loaded in a computer system is able to carry out these methods. Computer program in the present context means any expression, in any language, code or notation, of a set of instructions intended to cause a system having an information processing capability to perform a particular function either directly or after either or both of the following: a) conversion to another language, code or notation; b) reproduction in a different material form.
- While the present invention has been described with reference to certain embodiments, it will be understood by those skilled in the art that various changes may be made and equivalents may be substituted without departing from the scope of the present invention. In addition, many modifications may be made to adapt a particular situation or material to the teachings of the present invention without departing from its scope. Therefore, it is intended that the present invention not be limited to the particular embodiment disclosed, but that the present invention will include all embodiments falling within the scope of the appended claims.
Claims (20)
1. A system comprising:
an electronic device operable to control access to a physical medium utilizing carrier sense multiple access (CSMA), wherein the amount of time that said electronic device must sense said physical medium as being inactive before said electronic device permits transmission of a message onto said physical medium is determined based on the size of said message.
2. The system of claim 1 , wherein said amount of time that said electronic device must sense said physical medium as being inactive before said electronic device permits transmission of said message onto said physical medium is determined based on a type of said message.
3. The system of claim 1 , wherein said amount of time that said electronic device must sense said physical medium as being inactive before said electronic device permits transmission of said message onto said physical medium is determined based on a symbol rate at which said message is to be transmitted.
4. The system of claim 1 , wherein said amount of time that said electronic device must sense said physical medium as being inactive before said electronic device permits transmission of said message onto said physical medium is determined based on a channel onto which said message is to be transmitted.
5. The system of claim 1 , wherein:
said message is in response to a request received by said electronic device via said physical medium; and
said channel onto which said message is to be transmitted is determined based on a field of said received request.
6. The system of claim 5 , wherein:
said field of said received request comprises a list of channels;
said electronic device sequentially listen to channels in said list of channels until a channel meeting certain requirements is found or until a timeout occurs.
7. The system of claim 1 , wherein:
said message is in response to a request received via said physical medium by said electronic device; and
the maximum amount of time that said electronic device attempts to transmit said message onto said physical medium is determined based on a field of said previously-received request message.
8. The system of claim 1 , wherein:
said message is in response to a request received via said physical medium by said electronic device; and
while said message is pending transmission, a portion of said electronic device alternates between a listen state and a wait state, wherein the amount of time that said portion of said electronic device spends in one or both of said listen state and said wait state is determined based on one or more fields of said received request.
9. The system of claim 8 , wherein said one or more fields of said received request determine an equation and/or algorithm utilized by said electronic device for said determining said amount of time that said portion of said electronic device spends in one or both of said listen state and said wait state.
10. The system of claim 1 , wherein said electronic device comprises memory and a receiver and is operable to:
read a series of n-tuples from said memory, each of said n-tuple comprising a channel identifier, a scan duration value, and a time-to-next-scan value; and
for each of said read n-tuples:
configure said receiver to receive on the channel associated with said channel identifier for an amount of time equal to said scan duration value; and
power-down said receiver for an amount of time equal to said time-to-next-scan value minus said scan duration value.
11. The system of claim 1 , wherein said electronic device comprises memory, a transmitter, and a receiver and is operable to:
read a series of n-tuples from said memory, each of said n-tuple comprising a channel identifier, a contention period value, and a time-to-next-scan value; and
for each of said read n-tuples:
configure said transmitter to transmit a beacon on the channel associated with said channel identifier;
configure said receiver to listen for a response to said beacon for an amount of time equal to said contention period value; and
wait a period of time equal to said time-to-next-scan value minus said contention period value before operating based on the next n-tuple in said series of n-tuples.
12. A method comprising:
in an electronic device which utilizes carrier sense multiple access (CSMA) for communicating over a physical medium:
determining the amount of time that said electronic device must sense said physical medium as being inactive before permitting transmission of a message onto said physical medium based on the size of said message.
13. The method of claim 12 , wherein said determining said amount of time that said electronic device must sense said physical medium as being inactive before said electronic device permits transmission of said message onto said physical medium is based on a type of said message.
14. The method of claim 12 , wherein said determining said amount of time that said electronic device must sense said physical medium as being inactive before said electronic device permits transmission of said message onto said physical medium is based on a symbol rate at which said message is to be transmitted.
15. The method of claim 12 , wherein said determining said amount of time that said electronic device must sense said physical medium as being inactive before said electronic device permits transmission of said message onto said physical medium is based on a channel onto which said message is to be transmitted.
16. The method of claim 12 , wherein:
said message is in response to a request received by said electronic device via said physical medium; and
said channel onto which said message is to be transmitted is determined based on a field of said received request.
17. The method of claim 16 , wherein:
said field of said received request comprises a list of channels;
said electronic device sequentially listen to channels in said list of channels until a channel meeting certain requirements is found or until a timeout occurs.
18. The method of claim 12 , wherein:
said message is in response to a request received via said physical medium by said electronic device; and
the maximum amount of time that said electronic device attempts to transmit said message onto said physical medium is determined based on a field of said previously-received request message.
19. The method of claim 12 , wherein:
said message is in response to a request received via said physical medium by said electronic device; and
while said message is pending transmission, a portion of said electronic device alternates between a listen state and a wait state, wherein the amount of time that said portion of said electronic device spends in one or both of said listen state and said wait state is determined based on one or more fields of said received request.
20. The method of claim 19 , wherein said one or more fields of said received request determine an equation and/or algorithm utilized by said electronic device for said determining said amount of time that said portion of said electronic device spends in one or both of said listen state and said wait state.
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US15/880,833 Abandoned US20180152547A1 (en) | 2011-03-02 | 2018-01-26 | Method and apparatus for addressing in a resource-constrained network |
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US16/038,430 Abandoned US20180324725A1 (en) | 2011-03-02 | 2018-07-18 | Method and apparatus for dynamic media access control in a multiple access system |
US16/137,755 Abandoned US20190028979A1 (en) | 2011-03-02 | 2018-09-21 | Method and apparatus for addressing in a resource-constrained network |
US16/171,993 Abandoned US20190069254A1 (en) | 2011-03-02 | 2018-10-26 | Method and apparatus for query-based congestion control |
US16/193,546 Abandoned US20190090211A1 (en) | 2011-03-02 | 2018-11-16 | Method and apparatus for rapid group synchronization |
US16/213,050 Abandoned US20190116566A1 (en) | 2011-03-02 | 2018-12-07 | Method and apparatus for adaptive traffic management in a resource- constrained network |
US16/220,194 Abandoned US20190132811A1 (en) | 2011-03-02 | 2018-12-14 | Method and apparatus for power autoscaling in a resource-constrained network |
US16/290,605 Abandoned US20190200310A1 (en) | 2011-03-02 | 2019-03-01 | Method and apparatus for dynamic media access control in a multiple access system |
US16/413,442 Abandoned US20190281567A1 (en) | 2011-03-02 | 2019-05-15 | Method and apparatus for addressing in a resource-constrained network |
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US16/801,474 Abandoned US20200196258A1 (en) | 2011-03-02 | 2020-02-26 | Method and apparatus for rapid group synchronization |
US16/838,734 Abandoned US20200236639A1 (en) | 2011-03-02 | 2020-04-02 | Method and apparatus for power autoscaling in a resource-constrained network |
Country Status (2)
Country | Link |
---|---|
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Families Citing this family (56)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
WO2012048118A2 (en) | 2010-10-06 | 2012-04-12 | Blackbird Technology Holdings, Inc. | Method and apparatus for adaptive searching of distributed datasets |
WO2012048098A1 (en) | 2010-10-06 | 2012-04-12 | Blackbird Technology Holdings, Inc. | Method and apparatus for low-power, long-range networking |
US8718551B2 (en) | 2010-10-12 | 2014-05-06 | Blackbird Technology Holdings, Inc. | Method and apparatus for a multi-band, multi-mode smartcard |
WO2012068227A1 (en) | 2010-11-16 | 2012-05-24 | Blackbird Technology Holdings, Inc. | Method and apparatus for interfacing with a smartcard |
US9104548B2 (en) | 2011-01-21 | 2015-08-11 | Blackbird Technology Holdings, Inc. | Method and apparatus for memory management |
US8909865B2 (en) | 2011-02-15 | 2014-12-09 | Blackbird Technology Holdings, Inc. | Method and apparatus for plug and play, networkable ISO 18000-7 connectivity |
US9497715B2 (en) | 2011-03-02 | 2016-11-15 | Blackbird Technology Holdings, Inc. | Method and apparatus for addressing in a resource-constrained network |
US8929961B2 (en) | 2011-07-15 | 2015-01-06 | Blackbird Technology Holdings, Inc. | Protective case for adding wireless functionality to a handheld electronic device |
US9363707B2 (en) * | 2011-12-29 | 2016-06-07 | Qualcomm Incorporated | Systems and methods for generating and decoding short control frames in wireless communications |
US20130223338A1 (en) | 2012-02-29 | 2013-08-29 | Qualcomm Incorporated | Apparatus and methods for block acknowledgment compression |
US8909267B2 (en) * | 2012-04-19 | 2014-12-09 | Telefonaktiebolaget L M Ericsson (Publ) | Energy-efficient detection of network connection requests |
US20140064169A1 (en) * | 2012-09-05 | 2014-03-06 | Qualcomm Incorporated | Duty cycled transmissions |
US8873691B2 (en) * | 2012-09-10 | 2014-10-28 | Broadcom Corporation | Generating codes for sync words to avoid cyclic collision |
US10039073B2 (en) * | 2013-01-03 | 2018-07-31 | Qualcomm Incorporated | Method for determining location of wireless devices |
US9614935B2 (en) | 2013-03-15 | 2017-04-04 | Qualcomm Incorporated | Protected control frames |
US9781627B2 (en) | 2013-04-08 | 2017-10-03 | Qualcomm Incorporated | Systems and methods for generating and decoding short control frames in wireless communications |
EP2984851B1 (en) * | 2013-05-03 | 2017-04-26 | Huawei Technologies Co., Ltd. | Burst marker scheme in a communication system |
CN105393481B (en) * | 2013-07-30 | 2019-06-18 | 索尼公司 | Information processing unit and information processing method |
RU2636753C1 (en) * | 2014-01-29 | 2017-11-28 | ЭлДжи ЭЛЕКТРОНИКС ИНК. | Method for configuring mac pdu for d2d communication system and device for its implementation |
WO2015117228A1 (en) * | 2014-02-06 | 2015-08-13 | Brett Shellhammer | System, methods, and devices for addressed data communications |
JP5721912B1 (en) * | 2014-03-27 | 2015-05-20 | 三菱電機株式会社 | Wireless communication quality information processing apparatus and communication system |
US9743363B2 (en) * | 2014-06-24 | 2017-08-22 | Qualcomm Incorporated | CCA clearance in unlicensed spectrum |
US9699795B2 (en) * | 2014-07-07 | 2017-07-04 | Telefonaktiebolaget Lm Ericsson (Publ) | Method and apparatus for primary channel detection |
US10182413B2 (en) | 2014-07-30 | 2019-01-15 | Qualcomm Incorporated | Wireless positioning using scheduled transmissions |
US9973319B2 (en) * | 2014-11-21 | 2018-05-15 | Mediatek Inc. | Network Allocation Vector Improvement for Wireless Networks |
US10374832B2 (en) * | 2014-11-25 | 2019-08-06 | Nokia Solutions And Networks Oy | Optimized resource management in core network elements |
CN107580788B (en) | 2015-02-26 | 2021-10-15 | 三星电子株式会社 | Method for distinguishing between unicast device-to-device (D2D) and multicast D2D communications |
US9629109B2 (en) * | 2015-04-28 | 2017-04-18 | Landis+Gyr Innovations, Inc. | Techniques for optimizing network event timers |
US9947196B2 (en) | 2015-04-29 | 2018-04-17 | Senaya, Inc. | Wireless asset tracking systems with heterogeneous communication |
US10880198B2 (en) * | 2015-05-08 | 2020-12-29 | Qualcomm Incorporated | Aggregating targeted and exploration queries |
US10491512B2 (en) * | 2015-05-20 | 2019-11-26 | Qualcomm Incorporated | Supporting packet query-response transactions at lower layer |
US20170018924A1 (en) * | 2015-07-13 | 2017-01-19 | Power Over Time, Inc. | Systems and methods for reducing an electric utility reserve capacity using instrumented energy consuming devices |
US10055500B2 (en) * | 2015-10-27 | 2018-08-21 | International Business Machines Corporation | Optimizing searches |
US9801187B1 (en) * | 2015-11-05 | 2017-10-24 | Sprint Spectrum L.P. | Method and apparatus for controlling channel occupancy based on energy-level-coded quality of service indicia |
JP6631242B2 (en) * | 2015-12-24 | 2020-01-15 | カシオ計算機株式会社 | Communication device, communication system, communication method, and program |
US10116377B2 (en) | 2016-01-06 | 2018-10-30 | Google Llc | Dynamic forward error correction bypass in a digital communications system |
US20170222686A1 (en) | 2016-02-01 | 2017-08-03 | Qualcomm Incorporated | Scalable, high-efficiency, high-speed serialized interconnect |
CN108702358B (en) | 2016-02-01 | 2020-12-08 | 高通股份有限公司 | Scalable efficient high-speed serialized interconnect |
US10159053B2 (en) | 2016-02-02 | 2018-12-18 | Qualcomm Incorporated | Low-latency low-uncertainty timer synchronization mechanism across multiple devices |
US10145691B2 (en) * | 2016-05-18 | 2018-12-04 | Here Global B.V. | Ambiguity map match rating |
TWI601387B (en) * | 2016-06-22 | 2017-10-01 | 晨星半導體股份有限公司 | Decoding apparatus and decoding method including error correction process |
US9907047B1 (en) | 2016-08-30 | 2018-02-27 | Qualcomm Incorporated | Passive positioning procedure and use of single burst ASAP FTM sessions |
US20180091641A1 (en) * | 2016-09-28 | 2018-03-29 | Sensormatic Electronics, LLC | Repeater for frictionless access control system |
KR102431044B1 (en) * | 2017-03-30 | 2022-08-09 | 엘지전자 주식회사 | Communication device for vehicle and vehicle |
US11223507B2 (en) * | 2017-04-18 | 2022-01-11 | Qualcomm Incorporated | Payload with synchronization information |
US11277865B2 (en) * | 2017-05-30 | 2022-03-15 | Huawei Technologies Co., Ltd. | Methods and system for LBT threshold setting for directional reception and transmission |
DE102017006506A1 (en) * | 2017-06-29 | 2019-01-03 | Diehl Metering Systems Gmbh | Communication module for recording consumption data of a meter |
WO2019061514A1 (en) * | 2017-09-30 | 2019-04-04 | 深圳大学 | Secure wireless communication physical layer slope authentication method and apparatus |
CN107770729B (en) * | 2017-10-27 | 2021-03-12 | Oppo广东移动通信有限公司 | Signal intensity prompting method and related product |
US10375652B2 (en) * | 2017-12-19 | 2019-08-06 | Itron Global Sarl | Transmission power control for wireless communication devices |
US10701670B2 (en) * | 2018-01-03 | 2020-06-30 | Wirepas Oy | System for co-operative repetition of broadcast messages |
CN112087250B (en) * | 2019-06-13 | 2021-10-29 | 大唐移动通信设备有限公司 | Method and device for determining terminal sending parameters |
CN112243288B (en) * | 2019-07-16 | 2023-12-26 | 北京小米移动软件有限公司 | Power adjustment method and device, electronic equipment and readable storage medium |
FR3108223B1 (en) * | 2020-03-10 | 2022-02-11 | Sagemcom Energy & Telecom Sas | Method for downloading software into a plurality of meters |
US11606264B2 (en) | 2021-03-24 | 2023-03-14 | Cisco Technology, Inc. | Application of network layer FEC during predicted network events |
US11722248B1 (en) * | 2022-01-26 | 2023-08-08 | Zurn Industries, Llc | Cloud communication for an edge device |
Family Cites Families (246)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US5485486A (en) * | 1989-11-07 | 1996-01-16 | Qualcomm Incorporated | Method and apparatus for controlling transmission power in a CDMA cellular mobile telephone system |
US6389010B1 (en) | 1995-10-05 | 2002-05-14 | Intermec Ip Corp. | Hierarchical data collection network supporting packetized voice communications among wireless terminals and telephones |
US6714559B1 (en) | 1991-12-04 | 2004-03-30 | Broadcom Corporation | Redundant radio frequency network having a roaming terminal communication protocol |
JP2791236B2 (en) * | 1991-07-25 | 1998-08-27 | 三菱電機株式会社 | Protocol parallel processing unit |
US5338625A (en) | 1992-07-29 | 1994-08-16 | Martin Marietta Energy Systems, Inc. | Thin film battery and method for making same |
US5551018A (en) | 1993-02-02 | 1996-08-27 | Borland International, Inc. | Method of storing national language support text by presorting followed by insertion sorting |
US5465398A (en) * | 1993-10-07 | 1995-11-07 | Metricom, Inc. | Automatic power level control of a packet communication link |
US5959980A (en) | 1995-06-05 | 1999-09-28 | Omnipoint Corporation | Timing adjustment control for efficient time division duplex communication |
US6665308B1 (en) | 1995-08-25 | 2003-12-16 | Terayon Communication Systems, Inc. | Apparatus and method for equalization in distributed digital data transmission systems |
US5729557A (en) | 1995-10-12 | 1998-03-17 | Pacific Communication Systems, Inc. | Cellular communication system with multiple code rates |
US5959281A (en) | 1997-02-07 | 1999-09-28 | Lulirama International, Inc. | Interactive card reading system |
US6115379A (en) | 1997-09-11 | 2000-09-05 | 3Com Corporation | Unicast, multicast, and broadcast method and apparatus |
JPH11163947A (en) * | 1997-09-22 | 1999-06-18 | Toshiba Corp | Gateway device, radio terminal, router device and gateway control method for communication network |
US6700881B1 (en) * | 1998-03-02 | 2004-03-02 | Samsung Electronics Co., Ltd. | Rate control device and method for CDMA communication system |
US7466703B1 (en) * | 1998-05-01 | 2008-12-16 | Alcatel-Lucent Usa Inc. | Scalable high speed router apparatus |
WO2000003499A1 (en) * | 1998-07-13 | 2000-01-20 | Samsung Electronics Co., Ltd. | Power control device and method for reverse link common channel in mobile communication system |
US6607136B1 (en) | 1998-09-16 | 2003-08-19 | Beepcard Inc. | Physical presence digital authentication system |
US6381243B1 (en) | 1998-09-18 | 2002-04-30 | Telefonaktiebolaget Lm Ericsson (Publ) | Determining time slot delay for ATM transmission |
US6996088B1 (en) | 1998-09-18 | 2006-02-07 | Harris Corporation | Distributed trunking mechanism for VHF networking |
US6408387B1 (en) | 1999-01-22 | 2002-06-18 | Intel Corporation | Preventing unauthorized updates to a non-volatile memory |
US6356442B1 (en) | 1999-02-04 | 2002-03-12 | Palm, Inc | Electronically-enabled encasement for a handheld computer |
JP2000353143A (en) | 1999-04-08 | 2000-12-19 | Seiko Epson Corp | Method and device for retrieving node on network and recording medium recording program for searching node |
US6334047B1 (en) * | 1999-04-09 | 2001-12-25 | Telefonaktiebolaget Lm Ericsson (Publ) | Adaptive power control in a mobile radio communications system |
US6330700B1 (en) | 1999-05-18 | 2001-12-11 | Omnipoint Corporation | Out-of-band forward error correction |
US7702831B2 (en) | 2000-01-06 | 2010-04-20 | Super Talent Electronics, Inc. | Flash memory controller for electronic data flash card |
US7254806B1 (en) | 1999-08-30 | 2007-08-07 | Ati International Srl | Detecting reordered side-effects |
JP4374725B2 (en) * | 1999-09-22 | 2009-12-02 | パナソニック株式会社 | Communication method and communication station |
JP2001148650A (en) | 1999-11-19 | 2001-05-29 | Sanyo Electric Co Ltd | Radio base station |
US6307846B1 (en) | 2000-02-24 | 2001-10-23 | Motorola, Inc. | Method and system in wireless communication system for scheduling messages to reduce the quick paging channel peak power level |
US6424301B1 (en) | 2000-03-01 | 2002-07-23 | Siemens Vdo Automotive Corporation | Combination battery holder and antenna for keyfob |
JP3738205B2 (en) * | 2000-08-12 | 2006-01-25 | 三星電子株式会社 | Network transmission power optimization apparatus and method |
JP3899505B2 (en) | 2000-08-30 | 2007-03-28 | オムロン株式会社 | Wireless device |
US7698463B2 (en) * | 2000-09-12 | 2010-04-13 | Sri International | System and method for disseminating topology and link-state information to routing nodes in a mobile ad hoc network |
US6525928B1 (en) | 2000-09-20 | 2003-02-25 | 3Com Corporation | Case with communication module having a latching connector for a handheld computer system |
US6748215B1 (en) | 2000-09-29 | 2004-06-08 | Qualcomm, Incorporated | Method and apparatus for performing a candidate frequency search in a wireless communication system |
JP3943824B2 (en) * | 2000-10-31 | 2007-07-11 | 株式会社東芝 | Information management method and information management apparatus |
US20020078045A1 (en) | 2000-12-14 | 2002-06-20 | Rabindranath Dutta | System, method, and program for ranking search results using user category weighting |
US7349712B2 (en) * | 2001-01-31 | 2008-03-25 | Mitsubishi Denki Kabushiki Kaisha | Communications system with transmitting power control and method for the same |
EP1358639A1 (en) | 2001-02-08 | 2003-11-05 | Nokia Corporation | Smart card reader |
US6944188B2 (en) | 2001-02-21 | 2005-09-13 | Wi-Lan, Inc. | Synchronizing clocks across a communication link |
US7006483B2 (en) | 2001-02-23 | 2006-02-28 | Ipr Licensing, Inc. | Qualifying available reverse link coding rates from access channel power setting |
KR100406352B1 (en) | 2001-03-29 | 2003-11-28 | 삼성전기주식회사 | Antenna and method for manufacture thereof |
DE10126420A1 (en) | 2001-05-31 | 2002-12-05 | Philips Corp Intellectual Pty | Method for synchronizing a mobile station with a base station |
US6705531B1 (en) | 2001-07-02 | 2004-03-16 | Bellsouth Intellectual Property Corp. | Smart card system, apparatus and method with alternate placement of contact module |
US6996117B2 (en) * | 2001-09-19 | 2006-02-07 | Bay Microsystems, Inc. | Vertical instruction and data processing in a network processor architecture |
US7330446B2 (en) | 2001-09-21 | 2008-02-12 | Industrial Technology Research Institute | Closed-loop power control method for a code-division multiple-access cellular system |
KR100886202B1 (en) | 2001-09-25 | 2009-02-27 | 메시네트웍스, 인코포레이티드 | A system and method employing algorithms and protocols for optimizing carrier sense multiple accesscsma protocols in wireless networks |
KR100454961B1 (en) * | 2001-10-10 | 2004-11-06 | 삼성전자주식회사 | Apparatus and method for searching cell of discontinuous reception mode in mobile communication system |
US7248604B2 (en) | 2001-10-30 | 2007-07-24 | Ipr Licensing, Inc. | Throughput in multi-rate wireless networks using variable-length packets and other techniques |
US7389294B2 (en) | 2001-10-31 | 2008-06-17 | Amazon.Com, Inc. | Services for generation of electronic marketplace listings using personal purchase histories or other indicia of product ownership |
US7486693B2 (en) | 2001-12-14 | 2009-02-03 | General Electric Company | Time slot protocol |
US20030154243A1 (en) | 2002-02-14 | 2003-08-14 | Crockett Douglas M. | Method and an apparatus for registering a user in a group communication network |
US7411901B1 (en) * | 2002-03-12 | 2008-08-12 | Extreme Networks, Inc. | Method and apparatus for dynamically selecting timer durations |
KR100871219B1 (en) | 2002-04-24 | 2008-12-01 | 삼성전자주식회사 | Cell search apparatus for multi search in mobile communication system and method thereof |
US7224679B2 (en) * | 2002-05-10 | 2007-05-29 | Texas Instruments Incorporated | Dynamic update of quality of service (Qos) parameter set |
US6700491B2 (en) | 2002-06-14 | 2004-03-02 | Sensormatic Electronics Corporation | Radio frequency identification tag with thin-film battery for antenna |
KR100891788B1 (en) | 2002-07-08 | 2009-04-07 | 삼성전자주식회사 | Method for making contention of access for real time application and medium access control layer module |
US7072431B2 (en) | 2002-10-30 | 2006-07-04 | Visteon Global Technologies, Inc. | Clock timing recovery using arbitrary sampling frequency |
US20040085993A1 (en) * | 2002-11-05 | 2004-05-06 | Wentink Maarten Menzo | Shared-medium contention algorithm exhibiting fairness |
US7962361B2 (en) | 2002-11-07 | 2011-06-14 | Novitaz | Customer relationship management system for physical locations |
US7165824B2 (en) | 2002-12-02 | 2007-01-23 | Silverbrook Research Pty Ltd | Dead nozzle compensation |
JP4209890B2 (en) * | 2003-02-20 | 2009-01-14 | ザ−リンク・セミコンダクタ−・インコ−ポレイテッド | Method for providing a reference clock distribution means over a packetized network |
US7331220B2 (en) | 2003-04-09 | 2008-02-19 | Continental Teves Ag & Co., Ohg | Device and method for monitoring tyre pressures |
KR100522948B1 (en) | 2003-04-30 | 2005-10-24 | 삼성전자주식회사 | Method for performing packet flooding at wireless ad hoc network |
US7308103B2 (en) | 2003-05-08 | 2007-12-11 | Current Technologies, Llc | Power line communication device and method of using the same |
CN100372326C (en) | 2003-05-16 | 2008-02-27 | 索尼株式会社 | Radio communication system, radio communication device, radio communication method, and computer program |
US7945361B2 (en) | 2003-07-04 | 2011-05-17 | Pirelli Pneumatici S.P.A. | Method and system for determining a tyre load during the running of a motor vehicle |
US7293088B2 (en) | 2003-07-28 | 2007-11-06 | Cisco Technology, Inc. | Tag location, client location, and coverage hole location in a wireless network |
US7148851B2 (en) | 2003-08-08 | 2006-12-12 | Hitachi Metals, Ltd. | Antenna device and communications apparatus comprising same |
EP1509012A2 (en) | 2003-08-20 | 2005-02-23 | Samsung Electronics Co., Ltd. | Method and apparatus for scheduling uplink packet transmission in a mobile communication system |
US7012835B2 (en) | 2003-10-03 | 2006-03-14 | Sandisk Corporation | Flash memory data correction and scrub techniques |
US8462817B2 (en) | 2003-10-15 | 2013-06-11 | Qualcomm Incorporated | Method, apparatus, and system for multiplexing protocol data units |
US7369512B1 (en) | 2003-11-06 | 2008-05-06 | Bbn Technologies Corp. | Systems and methods for efficient packet distribution in an ad hoc network |
US7597250B2 (en) | 2003-11-17 | 2009-10-06 | Dpd Patent Trust Ltd. | RFID reader with multiple interfaces |
JP2005151299A (en) | 2003-11-18 | 2005-06-09 | Sanyo Electric Co Ltd | Radio communication apparatus, error correction method and error correction program |
US7554981B2 (en) | 2003-11-26 | 2009-06-30 | Wind River Systems, Inc. | System and method for efficient storage and processing of IPv6 addresses |
US7259678B2 (en) | 2003-12-08 | 2007-08-21 | 3M Innovative Properties Company | Durable radio frequency identification label and methods of manufacturing the same |
US7305237B2 (en) | 2003-12-17 | 2007-12-04 | Intel Corporation | Hole-filling channel access |
US20050138178A1 (en) | 2003-12-19 | 2005-06-23 | Shaun Astarabadi | Wireless mobility manager |
KR100564761B1 (en) | 2003-12-22 | 2006-03-27 | 한국전자통신연구원 | The hybrid inter token Carrier Sensing Multiple Access/Collision Avoidance protocol |
US20050139685A1 (en) | 2003-12-30 | 2005-06-30 | Douglas Kozlay | Design & method for manufacturing low-cost smartcards with embedded fingerprint authentication system modules |
US7453903B2 (en) * | 2004-01-07 | 2008-11-18 | Proxim Wireless Corporation | System and method for determining priorities in a wireless network |
US7668126B2 (en) | 2004-02-05 | 2010-02-23 | Texas Instruments Incorporated | Beacon coordination and medium access |
US10200094B2 (en) | 2004-04-02 | 2019-02-05 | Rearden, Llc | Interference management, handoff, power control and link adaptation in distributed-input distributed-output (DIDO) communication systems |
US7231530B1 (en) * | 2004-04-06 | 2007-06-12 | Cisco Technology, Inc. | System and method for saving power in a wireless network by reducing power to a wireless station for a time interval if a received packet fails an integrity check |
US7529565B2 (en) * | 2004-04-08 | 2009-05-05 | Starkey Laboratories, Inc. | Wireless communication protocol |
FR2869182B1 (en) | 2004-04-20 | 2008-03-28 | Thales Sa | ROUTING METHOD IN AN AD HOC NETWORK |
US7266661B2 (en) | 2004-05-27 | 2007-09-04 | Silverbrook Research Pty Ltd | Method of storing bit-pattern in plural devices |
JP2006013594A (en) | 2004-06-22 | 2006-01-12 | Nec Corp | Wireless lan communication system, wireless lan connection method, and wireless lan terminal device |
KR20060000342A (en) | 2004-06-28 | 2006-01-06 | 주식회사 이지브로네트웍스 | Device for enabling intra-edge routing-less premises internet protocol communication and communication method using the same |
US7097108B2 (en) | 2004-10-28 | 2006-08-29 | Bellsouth Intellectual Property Corporation | Multiple function electronic cards |
JP4578206B2 (en) * | 2004-11-02 | 2010-11-10 | パナソニック株式会社 | Communication device |
KR100590896B1 (en) * | 2004-11-26 | 2006-06-19 | 삼성전자주식회사 | Medium Access Method for contention and contention-free |
DE602005007314D1 (en) * | 2004-12-10 | 2008-07-17 | Canon Kk | Transmission device and method for transmission timing control |
JP4691987B2 (en) | 2004-12-28 | 2011-06-01 | 株式会社日立製作所 | Wireless tag and portable terminal |
JP4873868B2 (en) | 2005-02-09 | 2012-02-08 | ルネサスエレクトロニクス株式会社 | Passive RFID semiconductor device, IC tag, IC tag control method, and communication method |
JP4573663B2 (en) | 2005-02-16 | 2010-11-04 | 富士通株式会社 | Data relay device, data relay method, data transmission / reception device, and data communication system |
US7689195B2 (en) | 2005-02-22 | 2010-03-30 | Broadcom Corporation | Multi-protocol radio frequency identification transponder tranceiver |
JP5027793B2 (en) | 2005-03-11 | 2012-09-19 | ソシエテ ド テクノロジー ミシュラン | Deflection feature analysis for tire condition |
WO2006099210A2 (en) | 2005-03-11 | 2006-09-21 | Ems Technologies, Inc. | Dual polarization wireless repeater including antenna elements with balanced and quasi-balanced feeds |
US7375639B2 (en) | 2005-03-29 | 2008-05-20 | Emerson & Cuming Microwave Products, Inc. | RFID tags having improved read range |
US8351409B2 (en) | 2005-04-22 | 2013-01-08 | Axiometric, Llc | Timing synchronization in wireless mesh networks |
US20060238419A1 (en) * | 2005-04-25 | 2006-10-26 | Bucknor Brian E | Method and apparatus for aiding positioning of a satellite positioning system and receiver |
US7315248B2 (en) | 2005-05-13 | 2008-01-01 | 3M Innovative Properties Company | Radio frequency identification tags for use on metal or other conductive objects |
JP4684071B2 (en) * | 2005-05-20 | 2011-05-18 | 株式会社エヌ・ティ・ティ・ドコモ | Cell search control method and mobile device using the method |
JP4799054B2 (en) | 2005-06-03 | 2011-10-19 | 富士通株式会社 | Information access system and active contactless information storage device |
US8340115B2 (en) | 2005-06-29 | 2012-12-25 | Intel Corporation | Apparatus and method for combined rate and TX antenna selection mechanism |
JP2008545186A (en) | 2005-07-01 | 2008-12-11 | ボラーチ,ファブリジオ | General-purpose smart card |
EP1748636B1 (en) | 2005-07-28 | 2008-11-19 | Harman Becker Automotive Systems GmbH | Improved communication in passenger compartments |
EP1911301B1 (en) | 2005-07-29 | 2011-01-12 | Telefonaktiebolaget LM Ericsson (publ) | Closest user terminal search method for a telecommunication network and service node applying such a method |
US8155623B2 (en) | 2005-07-29 | 2012-04-10 | Nextel Communications Inc. | System and method for obtaining information from a wireless modem |
US7551087B2 (en) | 2005-08-19 | 2009-06-23 | Adasa, Inc. | Handheld and cartridge-fed applicator for commissioning wireless sensors |
EP1929799A2 (en) * | 2005-09-01 | 2008-06-11 | Optimal Licensing Corporation | Media access control architecture |
US20080242279A1 (en) | 2005-09-14 | 2008-10-02 | Jorey Ramer | Behavior-based mobile content placement on a mobile communication facility |
US20070083697A1 (en) | 2005-10-07 | 2007-04-12 | Microsoft Corporation | Flash memory management |
US20070083924A1 (en) | 2005-10-08 | 2007-04-12 | Lu Hongqian K | System and method for multi-stage packet filtering on a networked-enabled device |
CA2625364A1 (en) | 2005-11-01 | 2007-05-10 | Rotani, Inc. | Method and apparatus for client control of wireless communications |
US7222523B1 (en) | 2005-11-04 | 2007-05-29 | Silicon Valley Micro C. Corp. | Tire pressure sensor system with improved sensitivity and power saving |
WO2007066326A2 (en) | 2005-12-09 | 2007-06-14 | Sandisk Il Ltd. | Method for flash-memory management |
US7805129B1 (en) | 2005-12-27 | 2010-09-28 | Qurio Holdings, Inc. | Using device content information to influence operation of another device |
KR100695074B1 (en) * | 2006-01-09 | 2007-03-14 | 삼성전자주식회사 | Time synchronizing method in wireless sensor networks |
US20070183415A1 (en) * | 2006-02-03 | 2007-08-09 | Utstarcom Incorporated | Method and system for internal data loop back in a high data rate switch |
KR100782850B1 (en) | 2006-02-06 | 2007-12-06 | 삼성전자주식회사 | Method of performing handover using subnet information and apparatus therefor |
US7480848B2 (en) * | 2006-02-10 | 2009-01-20 | The Directv Group, Inc. | Methods and apparatus to select tornado error correction parameters |
US7809009B2 (en) * | 2006-02-21 | 2010-10-05 | Cisco Technology, Inc. | Pipelined packet switching and queuing architecture |
US7545796B2 (en) * | 2006-03-15 | 2009-06-09 | Coppergate Communications Ltd. | Shared medium CA/CSMA robustness |
JP2007251637A (en) | 2006-03-16 | 2007-09-27 | Freescale Semiconductor Inc | Radio communication apparatus, individual information writer, and individual information setting method |
US7663878B2 (en) | 2006-03-23 | 2010-02-16 | Harris Kent Swan | Modular protective housing with peripherals for a handheld communications device |
US7735116B1 (en) | 2006-03-24 | 2010-06-08 | Symantec Corporation | System and method for unified threat management with a relational rules methodology |
US7338923B2 (en) | 2006-04-11 | 2008-03-04 | Halliburton Energy Services, Inc. | Settable drilling fluids comprising cement kiln dust |
US7953457B2 (en) * | 2006-04-28 | 2011-05-31 | Research In Motion Limited | Methods and apparatus for reducing power consumption for mobile devices using broadcast-to-unicast message conversion |
DK2035965T3 (en) | 2006-06-16 | 2013-04-22 | Omikron Data Quality Gmbh | PROCEDURE TO AUTOMATICALLY ASSESS THE SIMILARITY OF TWO CHARACTERS STORED IN A COMPUTER |
JP2007331659A (en) | 2006-06-16 | 2007-12-27 | Bridgestone Corp | Method and device for estimating tire traveling condition and tire with sensor |
DE102006028827A1 (en) | 2006-06-21 | 2008-01-10 | Dynamic Systems Gmbh | Transponder with electronic memory chip and magnetic loop antenna |
US8228908B2 (en) * | 2006-07-11 | 2012-07-24 | Cisco Technology, Inc. | Apparatus for hardware-software classification of data packet flows |
US20100003680A1 (en) | 2006-07-18 | 2010-01-07 | Joern Lewin | Method For Determining The Methylation Rate of a Nucleic Acid |
KR100883652B1 (en) * | 2006-08-03 | 2009-02-18 | 삼성전자주식회사 | Method and apparatus for speech/silence interval identification using dynamic programming, and speech recognition system thereof |
EP1885088B1 (en) * | 2006-08-04 | 2008-12-17 | Alcatel Lucent | Routing device, routing module and routing method for an access network |
US8005101B1 (en) * | 2006-08-10 | 2011-08-23 | Bivio Networks, Inc. | Scalable architecture for deep-packet processing |
US8346863B2 (en) | 2006-08-15 | 2013-01-01 | International Business Machines Corporation | Contact initialization based upon automatic profile sharing between computing devices |
US7886962B2 (en) | 2006-08-17 | 2011-02-15 | Verizon Patent And Licensing Inc. | Multi-function transaction device |
US7681101B2 (en) | 2007-04-16 | 2010-03-16 | Cisco Technology, Inc. | Hybrid corrective scheme for dropped packets |
JP4259557B2 (en) | 2006-09-19 | 2009-04-30 | セイコーエプソン株式会社 | Printing apparatus and logical packet processing method |
US7961751B2 (en) | 2006-09-25 | 2011-06-14 | Futurewei Technologies, Inc. | Multiplexed data stream timeslot map |
WO2008048060A1 (en) * | 2006-10-18 | 2008-04-24 | Electronics And Telecommunications Research Institute | Tdm based cell search method for ofdm system |
JP4723458B2 (en) | 2006-11-07 | 2011-07-13 | 富士通株式会社 | Relay device, wireless communication system, and multicast relay method |
US8005002B2 (en) * | 2006-11-09 | 2011-08-23 | Palo Alto Research Center Incorporated | Method and apparatus for performing a query-based convergecast scheduling in a wireless sensor network |
WO2008064419A1 (en) | 2006-11-28 | 2008-06-05 | National Ict Australia Limited | Discovery of multiple inter-node links in wireless multi-hop networks |
US20080121687A1 (en) | 2006-11-28 | 2008-05-29 | Motorola, Inc. | Method and system for detecting an end of transaction for contactless transactions on a mobile device |
US7969930B2 (en) | 2006-11-30 | 2011-06-28 | Kyocera Corporation | Apparatus, system and method for managing wireless local area network service based on a location of a multi-mode portable communication device |
US7760689B2 (en) | 2006-12-01 | 2010-07-20 | Electronics And Telecommunications Research Institute | Method and apparatus for generating link quality indicator information in MB-OFDM UWB system |
US8005822B2 (en) | 2007-01-17 | 2011-08-23 | Google Inc. | Location in search queries |
CN103020106B (en) * | 2007-01-24 | 2016-05-18 | 谷歌公司 | Blending mobile search results |
US20080186859A1 (en) | 2007-02-06 | 2008-08-07 | Viasat, Inc. | Code multiplexed requests for controlling access to a shared communication medium |
US7826389B2 (en) | 2007-02-07 | 2010-11-02 | Nokia Corporation | Communications method |
US7890874B2 (en) | 2007-02-23 | 2011-02-15 | Dkcm, Inc. | Systems and methods for interactively displaying user images |
US7995687B2 (en) | 2007-03-05 | 2011-08-09 | Broadcom Corporation | Fast and reliable channel classification algorithms in bluetooth networks to detect and avoid 2.4 GHz interferers |
JP2008227642A (en) * | 2007-03-09 | 2008-09-25 | Hitachi Ltd | Retransmission control method and radio communication system |
US20080238621A1 (en) | 2007-03-30 | 2008-10-02 | Broadcom Corporation | Multi-mode rfid reader architecture |
US8063769B2 (en) | 2007-03-30 | 2011-11-22 | Broadcom Corporation | Dual band antenna and methods for use therewith |
US8705549B2 (en) * | 2007-04-06 | 2014-04-22 | International Business Machines Corporation | Structure and implementation of universal virtual private networks |
US8205080B2 (en) | 2007-05-11 | 2012-06-19 | Microsoft Corporation | Over the air communication authentication using a device token |
US7814107B1 (en) | 2007-05-25 | 2010-10-12 | Amazon Technologies, Inc. | Generating similarity scores for matching non-identical data strings |
US8782178B2 (en) * | 2007-06-14 | 2014-07-15 | Cisco Technology, Inc. | Distributed bootstrapping mechanism for peer-to-peer networks |
US20080320139A1 (en) | 2007-06-25 | 2008-12-25 | Yahoo! Inc. | Social mobilized content sharing |
JP2009010449A (en) * | 2007-06-26 | 2009-01-15 | Panasonic Corp | Radio communications equipment and packet transmission method therefor |
US8179915B2 (en) | 2007-06-28 | 2012-05-15 | Lantiq Deutschland Gmbh | System and method for transmitting and retransmitting data |
KR100982892B1 (en) | 2007-06-28 | 2010-09-16 | 주식회사 케이티 | Method for selecting the operational channel of network coordinator in wireless narrow area network and coordinator using thereof |
US8554271B2 (en) | 2007-06-30 | 2013-10-08 | Motorola Mobility Llc | Method and apparatus for performing neighbor scans on a wide area network in a mobile communication device operating a personal area network |
US7876272B2 (en) | 2007-07-31 | 2011-01-25 | Palm, Inc. | Antenna design for an attached accessory |
US8155093B2 (en) | 2007-08-01 | 2012-04-10 | Harris Corporation | Mobile ad-hoc network providing desired link delay offset without guard times and related methods |
US8700083B2 (en) | 2007-08-10 | 2014-04-15 | Qualcomm Incorporated | Adaptation of transmit power based on maximum received signal strength |
US8200681B2 (en) | 2007-08-22 | 2012-06-12 | Microsoft Corp. | Collaborative media recommendation and sharing technique |
US8666525B2 (en) | 2007-09-10 | 2014-03-04 | Palo Alto Research Center Incorporated | Digital media player and method for facilitating music recommendation |
US8341083B1 (en) | 2007-09-12 | 2012-12-25 | Devicefidelity, Inc. | Wirelessly executing financial transactions |
GB2455496B (en) | 2007-10-31 | 2012-05-30 | Hewlett Packard Development Co | Error detection method and apparatus |
US8705559B2 (en) * | 2007-11-14 | 2014-04-22 | Panasonic Corporation | Communication apparatus, communication method, and integrated circuit |
US8521202B2 (en) * | 2007-11-27 | 2013-08-27 | Sharp Kabushiki Kaisha | Mobile station device, wireless communication system, mobile station device control method, and mobile station device control program |
JP4427574B2 (en) | 2007-11-30 | 2010-03-10 | 国立大学法人広島大学 | Associative memory and search system using the same |
US7979667B2 (en) | 2007-12-10 | 2011-07-12 | Spansion Llc | Memory array search engine |
US20090171749A1 (en) | 2007-12-27 | 2009-07-02 | Frederic Laruelle | Method for Dynamic Advertisement Placement Based on Consumer and Response Capability Statistics |
US8522271B2 (en) | 2008-02-14 | 2013-08-27 | Qualcomm Incorporated | Methods and apparatuses for sharing user profiles |
WO2009104336A1 (en) | 2008-02-21 | 2009-08-27 | 日本電信電話株式会社 | Method for wireless base station search, device for wireless base station search, and program for wireless base station search |
US8229819B2 (en) | 2008-03-03 | 2012-07-24 | Wildfire Interactive, Inc. | Providing online promotions through social media networks |
US20090251295A1 (en) | 2008-03-07 | 2009-10-08 | Savi Technology, Inc. | Method and Apparatus for Tracking and Monitoring Containers |
DE102008015322A1 (en) | 2008-03-20 | 2009-09-24 | Mhm Harzbecher Medizintechnik Gmbh | Connecting element for connecting a transducer to a sealed fluid system |
US7995526B2 (en) | 2008-04-23 | 2011-08-09 | Honeywell International Inc. | Apparatus and method for medium access control in wireless communication networks |
US8725083B2 (en) * | 2008-05-13 | 2014-05-13 | Qualcomm Incorporated | Self calibration of downlink transmit power |
US20090292418A1 (en) | 2008-05-23 | 2009-11-26 | Kuykendal Robert L | Trip logger |
EP2506494B1 (en) * | 2008-06-23 | 2015-08-05 | Thomson Licensing | Collision mitigation for multicast transmission in wireless local area networks |
US8737383B2 (en) * | 2008-07-07 | 2014-05-27 | Intel Corporation | Techniques for enhanced persistent scheduling with efficient link adaptation capability |
KR101466585B1 (en) | 2008-07-10 | 2014-11-28 | 삼성전자주식회사 | Memory device and managing method of memory device |
CN101639713B (en) | 2008-07-31 | 2012-01-04 | 英业达股份有限公司 | Staggered embedded housing case |
US9177068B2 (en) | 2008-08-05 | 2015-11-03 | Yellowpages.Com Llc | Systems and methods to facilitate search of business entities |
US20100075612A1 (en) | 2008-09-19 | 2010-03-25 | Oi Emily H | Advertising desired range in a wireless network |
US20100078471A1 (en) | 2008-09-30 | 2010-04-01 | Apple Inc. | System and method for processing peer-to-peer financial transactions |
US20100097956A1 (en) | 2008-10-20 | 2010-04-22 | Toshiba America Research, Inc. | Multi-interface management configuration method and graphical user interface for connection manager |
US20100097946A1 (en) | 2008-10-22 | 2010-04-22 | Nokia Corporation | Optimized data transfer between approaching devices |
KR101001558B1 (en) * | 2008-11-10 | 2010-12-17 | 한국전자통신연구원 | Method and apparatus for synchronous sensor network construction |
KR101117684B1 (en) * | 2008-11-18 | 2012-02-29 | 나사렛대학교 산학협력단 | Method and apparatus for QoS support and multiple link connections in low-rate wireless network |
CA2745365C (en) | 2008-12-23 | 2013-01-08 | J.J. Mackay Canada Limited | Low power wireless parking meter and parking meter network |
KR101542520B1 (en) | 2009-01-13 | 2015-08-07 | 삼성전자주식회사 | Apparatus and method for sharing information through presence service in a communication network |
US20100179877A1 (en) | 2009-01-15 | 2010-07-15 | International Business Machines Corporation | Providing promotional data to registered wireless communication devices |
TWI380219B (en) | 2009-01-20 | 2012-12-21 | Phison Electronics Corp | Card reader with near field communication functions and near field communication device thereof |
EP2211480B1 (en) | 2009-01-26 | 2013-10-23 | Motorola Mobility LLC | Wireless communication device for providing at least one near field communication service |
US20100197261A1 (en) | 2009-01-27 | 2010-08-05 | Sierra Wireless, Inc. | Wireless control subsystem for a mobile electronic device |
KR101540797B1 (en) | 2009-03-12 | 2015-07-30 | 삼성전자 주식회사 | Method for connecting wireless communication devices and wireless communication device using this method |
US8390442B2 (en) | 2009-03-24 | 2013-03-05 | Savi Technology, Inc. | Method and apparatus for real-time location of assets |
CN101867965B (en) * | 2009-04-15 | 2014-01-01 | 中兴通讯股份有限公司 | User terminal pairing method and device in multi-user multi-input multi-output technology |
US20100280904A1 (en) | 2009-05-01 | 2010-11-04 | Sumit Pradeep Ahuja | Social marketing and networking tool with user matching and content broadcasting / receiving capabilities |
US9055105B2 (en) | 2009-05-29 | 2015-06-09 | Nokia Technologies Oy | Method and apparatus for engaging in a service or activity using an ad-hoc mesh network |
KR20100131211A (en) * | 2009-06-05 | 2010-12-15 | 삼성전자주식회사 | System and method for authentication in wireless local area network environment |
US8472467B2 (en) * | 2009-06-25 | 2013-06-25 | Intel Corporation | Wireless device and methods for opportunistic scheduling in a contention-based wireless network |
US8189584B2 (en) | 2009-07-27 | 2012-05-29 | Media Patents, S. L. | Multicast traffic management in a network interface |
US10304069B2 (en) | 2009-07-29 | 2019-05-28 | Shopkick, Inc. | Method and system for presentment and redemption of personalized discounts |
EP2483875A4 (en) | 2009-09-29 | 2013-12-11 | Savi Techn Inc | Apparatus and method for advanced communication in low-power wireless applications |
US20110099037A1 (en) | 2009-10-27 | 2011-04-28 | Useful Networks, Inc. | Location-Based, Time Sensitive Wireless Exchange |
US20110112892A1 (en) | 2009-11-06 | 2011-05-12 | Elia Rocco Tarantino | Multi-location based promotion method and apparatus |
US8340593B2 (en) * | 2009-11-10 | 2012-12-25 | Intel Corporation | Techniques to control uplink power |
US9832070B2 (en) | 2009-11-13 | 2017-11-28 | Comcast Cable Communications, Llc | Communication terminal with multiple virtual network interfaces |
US8462622B2 (en) | 2009-12-08 | 2013-06-11 | Qualcomm Incorporated | Detection of co-located interference in a multi-radio coexistence environment |
US20110156872A1 (en) | 2009-12-31 | 2011-06-30 | Alcatel-Lucent Usa Inc. | Smart rfid reader/router |
US8675651B2 (en) * | 2010-01-18 | 2014-03-18 | Qualcomm Incorporated | Coexistence mechanism for non-compatible powerline communication devices |
US8661309B2 (en) | 2010-01-29 | 2014-02-25 | Broadcom Corporation | Systems for high-speed backplane applications using pre-coding |
US8761060B2 (en) * | 2010-02-12 | 2014-06-24 | Qualcomm Incorporated | Controlling access point transmit power based on received access terminal messages |
US8483196B2 (en) | 2010-03-12 | 2013-07-09 | Qualcomm Incorporated | Methods and apparatus for supporting synchronization between groups of devices |
US8259745B2 (en) * | 2010-03-29 | 2012-09-04 | Intel Corporation | Enhanced carrier sensing for multi-channel operation |
RU2564529C2 (en) * | 2010-05-04 | 2015-10-10 | Телефонактиеболагет Лм Эрикссон (Пабл) | Power headroom reporting for carrier aggregation |
US8717146B2 (en) | 2010-06-30 | 2014-05-06 | General Electric Company | Methods and systems for integrated interrogation of RFID sensors |
US8972577B2 (en) | 2010-09-02 | 2015-03-03 | International Business Machines Corporation | Masterless slot allocation |
WO2012048118A2 (en) | 2010-10-06 | 2012-04-12 | Blackbird Technology Holdings, Inc. | Method and apparatus for adaptive searching of distributed datasets |
WO2012048098A1 (en) | 2010-10-06 | 2012-04-12 | Blackbird Technology Holdings, Inc. | Method and apparatus for low-power, long-range networking |
US20120086615A1 (en) | 2010-10-12 | 2012-04-12 | John Peter Norair | Method and Apparatus for an Integrated Antenna |
US8718551B2 (en) | 2010-10-12 | 2014-05-06 | Blackbird Technology Holdings, Inc. | Method and apparatus for a multi-band, multi-mode smartcard |
US20120116887A1 (en) | 2010-11-04 | 2012-05-10 | John Peter Norair | Method and Apparatus for Electronic Payment and Authentication |
US9558502B2 (en) | 2010-11-04 | 2017-01-31 | Visa International Service Association | Systems and methods to reward user interactions |
WO2012074670A1 (en) | 2010-11-04 | 2012-06-07 | Blackbird Technology Holdings, Inc. | Method and apparatus for tire pressure monitoring |
WO2012068227A1 (en) | 2010-11-16 | 2012-05-24 | Blackbird Technology Holdings, Inc. | Method and apparatus for interfacing with a smartcard |
US8543065B2 (en) * | 2010-11-30 | 2013-09-24 | Motorola Solutions, Inc. | Methods for using effective radiated transmit power of a base station at a wireless communication device to determine uplink transmission range and/or to adjust transmit power |
US20120191848A1 (en) | 2011-01-21 | 2012-07-26 | John Peter Norair | Method and apparatus for discovering people, products, and/or services via a localized wireless network |
US9104548B2 (en) | 2011-01-21 | 2015-08-11 | Blackbird Technology Holdings, Inc. | Method and apparatus for memory management |
US20120209716A1 (en) | 2011-02-15 | 2012-08-16 | Burns Patrick E | Method and apparatus for serving promotions in a low-power wireless network |
US8909865B2 (en) | 2011-02-15 | 2014-12-09 | Blackbird Technology Holdings, Inc. | Method and apparatus for plug and play, networkable ISO 18000-7 connectivity |
US9497715B2 (en) | 2011-03-02 | 2016-11-15 | Blackbird Technology Holdings, Inc. | Method and apparatus for addressing in a resource-constrained network |
US8929961B2 (en) | 2011-07-15 | 2015-01-06 | Blackbird Technology Holdings, Inc. | Protective case for adding wireless functionality to a handheld electronic device |
CA2881633A1 (en) | 2011-08-15 | 2013-02-21 | Connectquest | Close proximity notification system |
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