EP1393495A2 - Systeme de transmission de donnees bluetooth comportant une pluralite de terminaux auxiliaires - Google Patents

Systeme de transmission de donnees bluetooth comportant une pluralite de terminaux auxiliaires

Info

Publication number
EP1393495A2
EP1393495A2 EP02726079A EP02726079A EP1393495A2 EP 1393495 A2 EP1393495 A2 EP 1393495A2 EP 02726079 A EP02726079 A EP 02726079A EP 02726079 A EP02726079 A EP 02726079A EP 1393495 A2 EP1393495 A2 EP 1393495A2
Authority
EP
European Patent Office
Prior art keywords
address
group
data transmission
transmission system
addr
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Pending
Application number
EP02726079A
Other languages
German (de)
English (en)
Inventor
Michael Warmers
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Infineon Technologies AG
Original Assignee
Infineon Technologies AG
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Infineon Technologies AG filed Critical Infineon Technologies AG
Publication of EP1393495A2 publication Critical patent/EP1393495A2/fr
Pending legal-status Critical Current

Links

Classifications

    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W8/00—Network data management
    • H04W8/26—Network addressing or numbering for mobility support
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L61/00—Network arrangements, protocols or services for addressing or naming
    • H04L61/50—Address allocation
    • H04L61/5038—Address allocation for local use, e.g. in LAN or USB networks, or in a controller area network [CAN]
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L2101/00—Indexing scheme associated with group H04L61/00
    • H04L2101/60—Types of network addresses
    • H04L2101/618—Details of network addresses
    • H04L2101/622—Layer-2 addresses, e.g. medium access control [MAC] addresses
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W84/00—Network topologies
    • H04W84/18—Self-organising networks, e.g. ad-hoc networks or sensor networks

Definitions

  • Bluetooth data transmission system with a plurality of secondary devices
  • the invention relates to a data transmission system operating according to the Bluetooth standard.
  • the data transmission system comprises a main terminal (master) and secondary terminals (slaves). Data packets are exchanged between the main terminal device and the secondary terminal device by radio in accordance with a time slot method.
  • Piconets Data transmission systems of this type, in which data packets are transmitted by radio over only short distances, are referred to as piconets.
  • Piconets based on the Bluetooth standard which have a main terminal and a number of secondary terminals, the number of secondary terminals being limited to a maximum of seven secondary terminals.
  • this limitation only affects the secondary terminals that are actively integrated in the piconet in question.
  • the piconet may comprise an almost unlimited number (up to 2 48)
  • Another side terminals which are in a standby mode (Parked State) and are not ac- tively involved in the exchange of data within the piconet.
  • operating a secondary terminal in standby mode has disadvantages. Disadvantages are the increased outlay in protocol for maintaining a secondary terminal in the standby mode and the reduced accessibility of a secondary terminal in the standby mode, since it can only be reached at certain time intervals.
  • a data transmission from the main terminal to the secondary terminals is called a downlink.
  • the reverse case of data transmission from the secondary terminals to the main terminal is referred to as an uplink.
  • Time slot methods are used for data transmission.
  • time slots (slots) with a specific time length are assigned to the downlinks and uplinks.
  • the frequencies available for data transmission in piconets are defined by the ISM frequency bands (Industrial, Scientific and Medical).
  • the ISM frequency bands are reserved for the radio-oriented and license-free application of weak transmission power.
  • Bluetooth data transmission systems operate in a frequency band around 2.4 GHz.
  • FCC Federal Communications Commission
  • FHSS Frequency Hopping Spread Spectrum
  • each main and secondary terminal has an address that can be used to identify it (see also the Bluetooth specifications on the Internet at http://www.bluetooth.com).
  • Such an address BD_ADDR is shown in a diagram in FIG. 1.
  • the address BD_ADDR is composed of three address fields: a 24-bit address field LAP (Lower Address Part), an 8-bit address field UAP (Upper Address Part) and a 16-bit address field NAP (Non-Significant Address Part).
  • LAP Lower Address Part
  • UAP User Address Part
  • NAP Non-Significant Address Part
  • the address field LAP of the main terminal determines both the chronological sequence of the channel center frequencies and also identification information, which is used as channel access Code (CAC) is referred to and by means of which the main and secondary terminals of a piconet recognize such data packets that are transmitted within the piconet in question.
  • the identification information is derived from the address field LAP of the main terminal device and always leads a data packet to be transmitted in the piconet. All data packets that are exchanged within a piconet are listed with the same identification information.
  • the object of the invention is to provide a data transmission system based on the Bluetooth standard with a main terminal device and a plurality of secondary terminal devices, the data transmission system being designed for more than seven secondary terminal devices which are actively integrated in the data transmission system and are not in one in a standby mode.
  • a data transmission system which is based on the Bluetooth standard, comprises a main terminal and a first group of secondary terminals. Data packets are exchanged by radio between the main terminal and the secondary terminals of the first group. A first address of the main terminal is used for the connection identifier between the main terminal and the secondary terminals of the first group.
  • An essential idea of the invention is that the data transmission system further comprises a second group of secondary terminals, which are also designed for the wireless exchange of data packets with the main terminals. To identify the connection between the main direction and the secondary terminals of the second group, a second address of the main terminal is used.
  • the advantage of the data transmission system according to the invention lies in the possibility of connecting more than seven active secondary terminals to a main terminal at the same time.
  • the first and the second group can each have up to seven active secondary terminals.
  • a separate address of the main terminal is available for the data transmission of each group with the main terminal.
  • a connection to more than seven secondary terminals is only possible under the condition that a maximum of seven secondary terminals are in active contact with the main terminal and the remaining secondary terminals are in standby mode. This condition does not apply to the present invention.
  • An advantageous embodiment of the invention provides that the first and the second address of the main terminal differ in at least one bit. This makes it possible, for example, to use the Bluetooth address BD_ADDR of the main terminal for the first and the second address. By switching the at least one bit from 0 to 1 or from 1 to 0, the second address can be generated from the first address and vice versa.
  • the at least one bit is advantageously located in a predetermined address field, which in particular is the lower address part (LAP) in the Bluetooth standard
  • Address field is the designated address field.
  • the address field referred to as the lower address part always lists an address. From this address field of the main terminal device, identification information is used which serves to identify the secondary terminal device of a group with the main terminal device. Therefore, the implementation of the at least one bit in which the first and the distinguish second address, particularly advantageous in this address field.
  • the at least one bit can be the least significant bit (LSB; Least Significant Bit), which specifies the first and the second address of the main terminal.
  • a data packet of identification information is provided, from which, on the one hand, the secondary terminal devices can be determined in the case of a downlink, for which group of secondary terminal devices the data packet is intended, or on the other hand, the main terminal device can determine the group of secondary terminal devices in the case of an uplink which the data packet was sent out.
  • the identification information is obtained from the address field of the main terminal, which is referred to as the lower address part.
  • the main terminal is in a sub-state (Substate) "Page” and the sub-terminal in sub-states "Page Scan".
  • Substate sub-state
  • Page Scan sub-state
  • initialization information can be exchanged between the main terminal and the secondary terminals. Only after that are the secondary terminal equipment clearly defined.
  • all secondary terminal devices advantageously have devices (memories, filters, etc.) which determine their affiliation with one of the two groups.
  • the data transmission system according to the invention can be used, for example, in digital cordless communication systems with a short range, such as cordless telephones. use with multiple handsets.
  • Another application relates to data exchange between a computer and peripheral devices, such as a mouse, a printer or a scanner.
  • Another aspect of the invention relates to a main terminal device which has a first address and a second address.
  • the main terminal is integrated in a data transmission system with the features described above.
  • An advantage of such a main terminal is that it can communicate with secondary terminals from two piconets, with each piconet having up to seven secondary terminals in the Bluetooth standard.
  • FIG. 1 shows a schematic diagram of an address of a main or secondary terminal according to the Bluetooth standard
  • Fig. 2 shows an embodiment of the data transmission system according to the invention.
  • the data can be transmitted bidirectionally from the main terminal H to the secondary terminals NAi and NBi and vice versa.
  • the possible downlinks and uplinks are identified in FIG. 2 by connecting lines.
  • the wireless connections of the main terminal H to the secondary terminals NAi are characterized by an address BD_ADDR A of the main terminal H. From the address BD_ADDR A, identification information is derived which lists each data packet that is exchanged between the main terminal H and the secondary terminals NAi.
  • an address BD_ADDR B of the main terminal H characterizes the communication between the main terminal H and the secondary terminals NBi.
  • an address BD_ADDR A or BD_ADDR B of the main terminal H may only relate to a piconet with up to seven secondary terminals.
  • five further secondary terminal facilities NBi could be added to the present secondary terminal facilities NAi and NBi.
  • the main terminal device H exchanges data packets with more than fourteen active secondary terminal devices.
  • further addresses of the main terminal device H would have to be generated in order to meet the Bluetooth standard.

Landscapes

  • Engineering & Computer Science (AREA)
  • Computer Networks & Wireless Communication (AREA)
  • Signal Processing (AREA)
  • Databases & Information Systems (AREA)
  • Mobile Radio Communication Systems (AREA)
  • Small-Scale Networks (AREA)

Abstract

L'invention concerne un système de transmission de données bluetooth comportant un terminal principal (H), un premier groupe de terminaux auxiliaires (NAi) et un second groupe de terminaux auxiliaires (NBi). Entre le terminal principal (H) et des terminaux auxiliaires (NAi) du premier groupe ou les terminaux auxiliaires (NBi) du second groupe, des paquets de données peuvent être échangés par radio. Pour l'identification de la liaison avec le premier groupe ou avec le second groupe, le terminal principal (H) dispose respectivement d'une première adresse (BD ADDR A) et d'une seconde adresse (BD ADDR B).
EP02726079A 2001-05-23 2002-04-17 Systeme de transmission de donnees bluetooth comportant une pluralite de terminaux auxiliaires Pending EP1393495A2 (fr)

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
DE10125342A DE10125342A1 (de) 2001-05-23 2001-05-23 Bluetooth-Datenübertragungssystem mit einer Mehrzahl von Nebenendeinrichtungen
DE10125342 2001-05-23
PCT/DE2002/001430 WO2002096018A2 (fr) 2001-05-23 2002-04-17 Systeme de transmission de donnees bluetooth comportant une pluralite de terminaux auxiliaires

Publications (1)

Publication Number Publication Date
EP1393495A2 true EP1393495A2 (fr) 2004-03-03

Family

ID=7685994

Family Applications (1)

Application Number Title Priority Date Filing Date
EP02726079A Pending EP1393495A2 (fr) 2001-05-23 2002-04-17 Systeme de transmission de donnees bluetooth comportant une pluralite de terminaux auxiliaires

Country Status (6)

Country Link
US (1) US20040136350A1 (fr)
EP (1) EP1393495A2 (fr)
JP (1) JP3776402B2 (fr)
CN (1) CN1251456C (fr)
DE (1) DE10125342A1 (fr)
WO (1) WO2002096018A2 (fr)

Families Citing this family (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE10308947B4 (de) * 2003-02-28 2006-07-27 Infineon Technologies Ag Verfahren und System zur Datenübertragung
GB2408415B (en) * 2003-11-19 2008-04-09 Vodafone Plc Networks
US8457552B1 (en) * 2004-01-20 2013-06-04 Qualcomm Incorporated Method and apparatus for reduced complexity short range wireless communication system
KR101240551B1 (ko) * 2006-08-07 2013-03-18 삼성전자주식회사 블루투스 기반의 채팅 시스템 및 방법
KR20130061310A (ko) * 2011-12-01 2013-06-11 삼성전자주식회사 휴대 단말기의 액세서리 인식 방법 및 시스템
CN104581834A (zh) * 2013-10-16 2015-04-29 华为技术有限公司 协同处理无线数据的方法、相应装置及系统
US10512084B2 (en) 2015-03-10 2019-12-17 Telefonaktiebolaget L M Ericsson (Publ) Master node and a method therein for handling connections to slave devices

Family Cites Families (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE69319757T2 (de) * 1992-01-10 1999-04-15 Digital Equipment Corp Verfahren zur Verbindung einer Leitungskarte mit einer Adressenerkennungseinheit
US6026297A (en) * 1997-09-17 2000-02-15 Telefonaktiebolaget Lm Ericsson Contemporaneous connectivity to multiple piconets
US6570857B1 (en) * 1998-01-13 2003-05-27 Telefonaktiebolaget L M Ericsson Central multiple access control for frequency hopping radio networks
US6275498B1 (en) * 1998-03-19 2001-08-14 3Com Corporation Extended PHY addressing
US6266342B1 (en) * 1998-04-08 2001-07-24 Nortel Networks Limited Adaption resource module and operating method therefor
DE19934250A1 (de) * 1999-07-21 2001-02-15 Siemens Ag Energiesparende Verwaltung eines Datenübertragungsnetzwerks

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
See references of WO02096018A3 *

Also Published As

Publication number Publication date
DE10125342A1 (de) 2002-12-12
US20040136350A1 (en) 2004-07-15
WO2002096018A2 (fr) 2002-11-28
WO2002096018A3 (fr) 2003-02-13
CN1511397A (zh) 2004-07-07
CN1251456C (zh) 2006-04-12
JP2004527189A (ja) 2004-09-02
JP3776402B2 (ja) 2006-05-17

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