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Topic: Piconet

In the News (Wed 28 Jan 15)

  Piconet: Embedded Mobile Networking
Piconet is an attempt to understand the implications of the provision of wireless connectivity at the level described here.
Piconet provides a broad range of mobile and embedded computing objects with the ability to exploit an awareness of, and connectivity to, their environment.
Piconet is presently limited to 40 kb/s by the size and cost of the available radio transceivers, but if we can move to higher bit rates, we must seriously consider a secondary radio or the use of timing protocols for rendezvous purposes.
www.comsoc.org /pci/private/1997/oct/Bennett.html   (7888 words)

 Personal area network - Wikipedia, the free encyclopedia
A Bluetooth PAN is also called a piconet, and is composed of up to 8 active devices in a master-slave relationship (up to 255 devices can be connected in "parked" mode).
The first Bluetooth device in the piconet is the master, and all other devices are slaves that communicate with the master.
A piconet typically has a range of 10 meters, although ranges of up to 100 meters can be reached under ideal circumstances.
en.wikipedia.org /wiki/Personal_area_network   (370 words)

 InterlinkBT's Piconet bus station
Piconet offers the same features, performance and durability as bus stations up to four times its size.
piconet is a rugged, stand-alone module that connects the machine controller to the field devices and indicates the operating status of the bus network, module, inputs, and outputs.
Piconet modules are rated I P67 and are full-potted for watertight performance that withstands most industrial environments.
www.macphersoncontrol.com /pressreleases/interlinkbt/piconet.html   (316 words)

 Frontline Test Equipment: BPA105 - Characteristics
Instead, after synchronizing to the piconet it passivelylistens in and logs all baseband packets transmitted between the master and slaves of the piconet.
Piconet Mode - In Piconet Mode, the protocol analyzer uses its fully Bluetooth qualified protocol stack and participates as the master or a slave in a piconet.
Piconet Mode is useful when the developer requires a known reference device in the piconet or needs to generate user-defined errors and packets for stress testing.
www.fte.com /bpa03.asp   (1324 words)

 Bluetooth; How networks are formed and controlled
The connection procedure for a non-existent piconet is initiated by any of the devices, which then becomes master of the piconet thus created.
However, since the piconet parameters are derived from the device addresses and clock of the Master, a Master-Slave switch involves a redefinition of the piconet as well; a piconet switch.
As a consequence of this piconet switch, other slaves in the piconet, not involved in the switch, have to be logically moved to the new piconet.
www.swedetrack.com /images/bluet10.htm   (630 words)

 [No title]   (Site not responding. Last check: 2007-10-13)
3, piconet 1 includes a master node 303 and the slave nodes 301,302 and 304; piconet 2 includes the master node 305 and the slave nodes 304,306,307 and 308; and piconet 3 includes the master node 309 and the slave nodes 308,310 and 311.
In addition, MCS piconets may also move some of the nodes from a full piconet to a less occupied piconet in order to let the less occupied piconet incorporate more of the nodes, or to incorporate more nodes into piconets within the less occupied node's reach.
In each piconet that the message passes through the master node of the particular piconet selects a number of candidate nodes, if any, and stores them in the message before it is forwarded to the next node in the MCS path.
www.wipo.int /cgi-pct/guest/getbykey5?KEY=01/97448.011220&ELEMENT_SET=DECL   (17256 words)

 How Bluetooth Technology Works
A piconet starts with two connected devices, such as a portable PC and cellular phone, and may grow to eight connected devices.
However, when establishing a piconet, one unit will act as a master and the other(s) as slave(s) for the duration of the piconet connection.
In a piconet there is a master unit whose clock and hopping sequence are used to synchronize all other devices in the piconet.
www.mobileinfo.com /Bluetooth/how_works.htm   (1261 words)

 [No title]   (Site not responding. Last check: 2007-10-13)
In the case where any of these remaining nodes is a forwarding node, which is not connected to the piconet containing the node from which the cancellation of broadcast message was received by the receiving node, the cancellation of broadcast message is forwarded to this forwarding node.
At the master unit M3 of the piconet No. 3, the broadcast message is replaced by a cancellation of broadcast message, which is a source C of the cancellation of broadcast message, e.
At the slave unit, the source C in the piconet No. 1, the broadcast message, as already was mentioned, is replaced by the cancellation of broadcast message, since the source C avoids redundant distribution of the broadcast message by the node that received the broadcast message.
www.wipo.int /cgi-pct/guest/getbykey5?KEY=01/41379.010607&ELEMENT_SET=DECL   (8670 words)

 [No title]
In this paper we propose a flexible polling mechanism for the master that begins with common polling periods for all slaves and subsequently increases the polling period for slaves with less traffic load.
This paper proposes a flexible piconet scheduling mechanism which is not incompatible with a) and b) and involves variable-rate polling; the master-slave connections with little (but not dormant) activity are polled less frequently.
In Section 4, the throughput and access latencies of the piconet under flexible polling is compared by simulation to that under standard polling.
labs.ee.psu.edu /faculty/kesidis/public_html/Bluetooth1.doc   (1175 words)

 Wireless Bluetooth Specification, Device & Connection Terms & Glossary
However,when establishing a piconet, one unit will act as a master and the other(s) as slave(s) for the duration of the piconet connection.
Master unit: the device in a piconet whose clock and hopping sequence are used to synchronize all other devices in the piconet.
Slave units: all devices in a piconet that are not the master.
www.website101.com /bluetoothwidget/bluetooth_info.html   (2411 words)

 Message Routing Over a (Bluetooth) Scatternet - Ron Alterovitz
However, piconets may overlap, so a slave in one piconet can be a master or slave in an adjacent piconet.
Thus, any device in a piconet can connect to a device in an adjacent piconet, if it is within range, and route messages to any device in that piconet.
For ease of future development, the piconet simulator and the scatternet routing protocols are compiled as libraries.
www.cs.caltech.edu /~rona/cs134c/final   (2382 words)

 United States Patent Application: 0040235489
In a conventional piconet, a piconet coordinator transmits a beacon for channel synchronization to each device connected to the piconet at a predetermined time interval.
Since the piconet coordinator 1 calculates a time required for moving to a new channel and informs the sending device 110 of the time by setting an RTP field of a relay response as shown in FIG.
After the RTP passes, the piconet operates in the new channel (because the time required for moving to the new channel is calculated and set), and the sending device 110 and the receiving device 120 perform the peer-to-peer communication again in step 10.
appft1.uspto.gov /netacgi/nph-Parser?Sect1=PTO1&Sect2=HITOFF&d=PG01&p=1&u=/netahtml/PTO/srchnum.html&r=1&f=G&l=50&s1="20040235489".PGNR.&OS=DN/20040235489&RS=DN/20040235489   (3011 words)

 Direct Communication Among Slaves: Questions/Views
The only way for a slave to communicate with another slave is to create a new piconet with the former as the master and the latter as the slave.
All of the communications between the slaves in a piconet must go through the master of that piconet only.
There is one point to arise: You might ask: what if an active slave in a piconet [A] becomes a master for other piconet [B] while he is still a slave at piconet [A], i.e.
www.palowireless.com /infotooth/knowbase/baseband/45.asp   (377 words)

 Atmel Corporation
Several piconets can be collocated and this is due to the specific RF technology adopted in Bluetooth.
Once a station becomes a member of the piconet, there is no contention for access to the medium, as it transmits and receives at predefined slot instances.
In addition to the piconet network topology the specification defines the notion of "scatternet", that is a network formed by interconnected piconets where members belong "simultaneously" to more than one piconets.
www.atmel.com /dyn/products/faq_card.asp?faq_id=829   (228 words)

 What is piconet? - A Word Definition From the Webopedia Computer Dictionary
A piconet is formed when at least two devices, such as a portable PC and a cellular phone, connect.
When a piconet is formed, one device acts as the master while the others act as slaves for the duration of the piconet connection.
"Piconet" is a combination of the prefix "pico," meaning very small or one trillionth, and network.
www.webopedia.com /TERM/P/piconet.html   (125 words)

 Baseband Layer Tutorial
The hopping sequence is unique for the piconet and is determined by the Bluetooth device address (BD_ADDR) of the master; the phase in the hopping sequence is determined by the Bluetooth clock of the master.
Since each piconet has a different master, the piconets hop independently, each with their own channel hopping sequence and phase as determined by the respective master.
The piconet is synchronized by the system clock of the master.To transmit on the piconet channel you need 3 pieces of information, The (channel) hopping sequence, the phase of the sequence, and the CAC to place on the packets
www.palowireless.com /infotooth/tutorial/baseband.asp   (2433 words)

 Bluetooth networking   (Site not responding. Last check: 2007-10-13)
Piconets are uncoordinated and hop independently: synchronization of different piconets is not permitted in the unlicensed ISM band.
A master unit can also periodically jump to another piconet and act as a slave (were it to act as a master in the new piconet, that piconet would have the same channel parameters as the “old” piconet—therefore, by definition the two would be indiscernible).
Piconet Y consists of master Y and slaves Ay, By, and Dy.
www.cclinf.polito.it /~s100675/bt_net.html   (1739 words)

 Infoarchive - piconet® fieldbus modules
piconet® – that is the byword for a new generation of miniaturised decentralised I/O modules in protection degree IP67.
piconet® stations are a lot smaller than conventional fieldbus components and can be mounted directly in the field.
In addition to the 8-channel digital and 4-channel analogue stand-alone modules, the piconet® family comprises coupling and extension modules.
www.turck-globe.de /en/14_304.aspx   (163 words)

 Masters and Slaves: Roles in a Bluetooth Piconet   (Site not responding. Last check: 2007-10-13)
This is because a piconet is a group of devices all synchronized on a hopping sequence set by the master.
Figure 3 shows what happens if a Bluetooth device is a slave on one piconet but has to visit another piconet where it is the master, perhaps to poll a slave to comply with a polling interval that it has negotiated.
Thus, timing that worked for a device that is the master on one piconet and a slave on another would be wrong for a device that was a slave on two piconets.
www.informit.com /articles/article.asp?p=21324&seqNum=4   (811 words)

 Untitled Document   (Site not responding. Last check: 2007-10-13)
The Piconet has a Master-Slave structure, where one device acts as the Master and the other as the Slave.
However, a device in a Piconet can be a member of another Piconet in the vicinity.
When a Piconet is formed, the sequency of hopping is determined by the Master device's Device Address.
www.geocities.com /blue_prasso/bluetooth/tech.htm   (697 words)

 Silicon Wave Demonstrates Piconet for Bluetooth Networks   (Site not responding. Last check: 2007-10-13)
The first to announce support of both piconet and master/slave switch, Silicon Wave will be demonstrating a Bluetooth Personal Area Network (PAN) among a variety of mobile devices at the Bluetooth Congress 2000 in Monte Carlo, June 13-16, 2000.
Piconet is the feature of the Bluetooth specification that allows networking among devices over Bluetooth radio connections to create a PAN.
The piconet can be a point-to-point connection between two devices or a point-to-multipoint network with as many as eight devices in total.
www.mobic.com /oldnews/2000/06/silicon_wave_demonstrates_picone.htm   (324 words)

 Piconet - Wikipedia, the free encyclopedia
A piconet is an ad-hoc network of computing devices using Bluetooth technology protocols to allow one master device to interconnect with up to seven active slave devices (because a three-bit MAC address is used).
Many other slave devices can be inactive, or parked, and the master device can bring parked devices back into active status at any time.
Masters and Slaves: Roles in a Bluetooth Piconet
en.wikipedia.org /wiki/Piconet   (105 words)

 Roaming charges: Pumping the piconet: A first peek at the new WPANs   (Site not responding. Last check: 2007-10-13)
The primary function of the controller is to establish the basic timing for the piconet, using beacon headers to designate time allocations for different devices.
The controller is also responsible for security on the piconet, which involves all the usual public-key techniques.
With these periods defined, other devices in the piconet set always know when the set will next be awake and handling traffic.
www-128.ibm.com /developerworks/library/wi-roam14   (2577 words)

 Piconet   (Site not responding. Last check: 2007-10-13)
In the Bluetooth™ system, a piconet is created when two or more devices create a Master /Slave connection in an ad hoc fashion, an example being a cellular phone and a computer.
Each piconet can have only one Master, one to seven active Slaves, and 0-255 Parked Slaves.
All devices in the piconet use the same physical channel, this is defined by the master device.
www.mpirical.com /companion/Multi_Tech/Piconet.htm   (65 words)

 Interface . . . Bluetooth   (Site not responding. Last check: 2007-10-13)
A Piconet can be a simple connection between two or more devices.
A device in a piconet can also be a member of another by time multiplexing.
When establishing a piconet, one unit will act as a master and the other(s) as slave(s) for the duration of the piconet connection.
www.ewh.ieee.org /sb/sjce/interface/ed2/bluetooth.htm   (559 words)

 [No title]
The term piconet is not defined in clause 3 and wireless personal area network is also not defined, so it is difficult to be sure if this is the case.
The committee has decided to use piconet in the 802.15.3 draft since it was also commonly used in the 802.15.1 draft as well.
Suggested is piconet although no strong preference except that piconet seems to be general term thoughout the document.
grouper.ieee.org /groups/802/15/pub/2002/Jan02/02064r1P802-15_WG-LB12-Comments.txt   (3008 words)

 Implementing Bluetooth in an Embedded Environment   (Site not responding. Last check: 2007-10-13)
In a piconet, one Bluetooth device acts as a master, controlling all traffic in the piconet, while all other devices act as slaves.
The master is defined as the device that initiates the connection procedure to establish a piconet.
The piconet master determines the hopping sequence and the timing is determined by the master unit's system clock.
www.developonline.com /community/tech_topic/bluetooth/feature_article/14733?print   (2463 words)

 Network Computing | Workshop | Mobile & Wireless Technology | The Bluetooth Invasion Begins | Page 2 | March 19, 2001
Radios in a piconet can be in one of five states: standby, inquire, page, connect and park/hold.
Connect is a radio active on a piconet as a master, slave or simultaneous.
Each piconet is hopping with a different sequence sharing the same 2.4-GHz band.
www.nwc.com /1206/1206ws32.html   (1184 words)

 [No title]   (Site not responding. Last check: 2007-10-13)
7.5 child piconet: A piconet that exists entirely within a channel time allocation of another piconet, the parent piconet, and is controlled by a device that is a member of the parent piconet.
The area of overlapping coverage between the two piconets may vary between congruency with the parent coverage area to mostly non-overlapping.
7.23 neighbor piconet: A piconet that exist entirely within a channel time allocation of another piconet, the parent piconet, and is controlled by a device that is not a member of the parent piconet.
comnet.technion.ac.il /~cn14s04/wlan_final_report.doc   (3063 words)

Every piconet has a master-slave configuration and the master arbitrates channel access between slaves by using an intra-piconet scheduling algorithm.
Several intra-piconet scheduling algorithms have been proposed in the literature but all are designed for single piconets, and may not perform well when multiple piconets are interconnected in a scatternet.
BrP uses the availability information of the slave nodes in the current piconet – their presence and absence – and compensates the bridge nodes for their periods of absence to provide performance enhancement.
rave.ohiolink.edu /etdc/view?acc_num=ucin1070639743   (298 words)

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