WO2005107300A1 - Verfahren und vorrichtung zum zeitgleichen betrieb mindestens zweier drahtloser verbindungsstrecken - Google Patents
Verfahren und vorrichtung zum zeitgleichen betrieb mindestens zweier drahtloser verbindungsstrecken Download PDFInfo
- Publication number
- WO2005107300A1 WO2005107300A1 PCT/EP2005/050913 EP2005050913W WO2005107300A1 WO 2005107300 A1 WO2005107300 A1 WO 2005107300A1 EP 2005050913 W EP2005050913 W EP 2005050913W WO 2005107300 A1 WO2005107300 A1 WO 2005107300A1
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- WO
- WIPO (PCT)
- Prior art keywords
- slot
- transmission method
- transmission
- slots
- events
- Prior art date
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Classifications
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W16/00—Network planning, e.g. coverage or traffic planning tools; Network deployment, e.g. resource partitioning or cells structures
- H04W16/14—Spectrum sharing arrangements between different networks
Definitions
- the invention relates to a method for the simultaneous operation of at least two wireless links according to the preamble of claim 1. Furthermore, the invention relates to a device for the simultaneous operation of at least two wireless links.
- DECT Digital Enhanced Cordless Telecommunications
- WECT Standard Digital Cordless Telecommunications
- the WDCT standard uses carrier frequencies in the free ISM band (2.4 GHz).
- the Bluetooth standard has emerged in recent years, which promises an inexpensive connection between various devices, for example between a computer and a digital camera.
- the Bluetooth standard also has its carrier frequency in the ISM band.
- a digital transmission method transmits the data by means of a sequence of frames (frames), which in turn can be sub-frames (subframes) and have several slots (time slots).
- the slots are used to define times at which slot events can occur, that is to say the transmission of a data packet can take place.
- the period of time that is occupied by a slot or a frame is referred to as a slot cycle or frame cycle.
- a TDMA procedure can only be used regularly if the frame and slot cycles match. If slot cycles or frame cycles do not match, or neither slot cycles nor frame cycles - as is the case with WDCT and Bluetooth, for example - the known TDMA method does not achieve satisfactory results.
- This object is based on the method according to the preamble of claim 1 by its characterizing
- Frequency bands lie, whereby the transmission methods also transmit data in a sequence of frames divided into several slots with defined frame and slot cycles, the frame and / or slot cycles of the transmission methods are of different lengths in time, the first transmission method is isochronous and signal fields of the links are such overlap that signals from two different transmission methods are received at at least one receiver of a link, the slot events of the second transmission method are dynamically distributed to the slots available in the second transmission method depending on slot events of the first transmission method.
- the slot events are distributed, that is to say the assignment of data packets to specific slots, in such a way that the slot events of the second transmission method take place at the times when the first, isochronous transmission method has no slot event.
- the dynamic adaptation makes it possible that, despite the different frame and / or slot cycles, interference-free coexistence of both transmission methods is achieved. In particular, it is therefore not necessary to modify the first transmission method.
- This pre- The proposed procedure is referred to below as slot hopping.
- slot hopping In particular in the case of different frame and slot cycles, the coexistence of two fundamentally different transmission methods, in particular with respect to their temporal course, can be realized.
- the proposed method can in principle also be used for line-bound transmission links if two signals which overlap in their carrier frequency ranges are to be carried on one line.
- the method can also be used in a non-isochronous first transmission method, with additional precautions then having to be taken in order to determine the slots actually available for slot events.
- the dynamic distribution of the slot events is advantageously defined as a deterministic slot change sequence.
- the respective receiver In order for the transmission along the transmission path to work with the proposed slot change method, the respective receiver must know which slots of a frame the sender places the slot events on. This basically means that the transmitter must signal the respective slots to the receiver.
- a deterministic slot change sequence is used, i.e. a sequence that can be determined using at least one parameter without naming all the individual elements of the sequence, it is sufficient to transmit the at least one named parameter to the receiver (for example a start value) and the slot change sequence from To have the recipient identified. This eliminates the need to signal each slot and increases the performance of the transmission link.
- the slot change sequence is derived from an identity identifier used in the second transmission method. If such a determinable slot change sequence is used, it is sufficient to use the identity identifier to be transmitted between transmitter and receiver so that the receiver can automatically determine the slot change sequence used by the transmitter. This keeps the data volume low, which must be transmitted to the receiver to determine the respective slots.
- the slot change sequence is determined by means of a pseudo-random sequence.
- the pseudo-random sequence is a sequence of numbers that, starting from a starting value, consists of apparently randomly selected, yet precisely determined numbers. It offers an easy way to create a slot change sequence and to make the entire sequence known based on its starting value. Furthermore, the effects of a systematic disturbance can be reduced and the security against eavesdropping improved.
- the dynamic distribution of the slot events is advantageously selected in such a way that a plurality of mutually independent connections can exist along the first and / or second connection path.
- the first transmission method is advantageously a Bluetooth transmission method.
- Bluetooth has found its way into various products, especially for end customers. It is now possible that Bluetooth can coexist with a second transmission method and therefore advantageously no interventions on existing Bluetooth devices are required.
- the second transmission method is a TDMA-based transmission method, in particular a WDCT transmission method.
- WDCT standard - as a prominent example of a TDMA-based standard, has found widespread use due to its performance, which is associated with a very high number of operated WDCT devices.
- the invention now allows the first transmission method in addition to a WDCT
- a dummy bearer sent according to the second transmission method is advantageously determined by a receiver by evaluating slot events on at least two receiving slots.
- the receiver receives an identity message from a transmitter, the receiver initially has no information about which slot change sequence is used by the transmitter and at which position of the slot change sequence the transmitter is currently located. Since the dummy bearer sent by the transmitter is also transmitted using the slot change method, the receiver can now use the dummy bearer by evaluating the at least two Determine reception slots, that is, the reception slots are evaluated until the slot change sequence of the dummy bearer has been detected. An increase in the reception slots evaluated by the receiver regularly leads to an accelerated determination of the slot change sequence of the dummy bearer.
- the individual slots advantageously run through independent frequency change sequences. This simplifies the detection of the slot change sequence.
- the second transmission method is a WDCT transmission method with 10 slots per frame.
- the proposed method can thus be implemented particularly inexpensively. Further details can be found in the exemplary embodiment.
- the Bluetooth transmission method at least partially transmits data as HV3 data packets. Are along the Bluetooth link HV3-
- the invention relates to a transmitting device and a receiving device for simultaneous operation of the previously described connection links, with a slot allocation device or a slot evaluation device, which carry out a method according to the features described above.
- 1 shows the sequence of two simultaneous connections using WDCT and Bluetooth
- 2a shows a slot adaptation of a handset when a dummy bearer is sent from a base station in slot 0
- FIG. 2b shows a slot adaptation of a handset when a dummy bearer is sent from a base station in slot 4
- FIG. 3 shows the basic structure of a connection path with a transmitting device and a receiving device.
- FIG. 1 shows the temporal course of a signal transmission along a WDCT connection path, the connection path being simultaneously overlaid by a Bluetooth transmission path.
- the course is shown here for a period of 3 frames of the WDCT process.
- the WDCT signal is shown in the upper part and the Bluetooth signal in the lower part.
- Each area A, B, C represents an Fxame which extends over a total duration of 10 ms and is divided into a total of 10 slots with a width of 1 ms.
- Each frame is divided into two subframes, namely a subframe TX in transmit mode and a subframe RX in receive mode.
- the subframe TX extends from slot 0 to slot 4, the subframe RX from slot 5 to slot 9.
- a slot of the WDCT method is used for a slot event, this is indicated by a rectangle. In the inside of the rectangle, a Roman number is noted for which connection the slot event is used within the WDCT link. (In this example, three connections I, II and III are used at the same time.)
- the signal course on the Bluetooth connection path is not to be explained in more detail here, since this is a known standard which is to be regarded as an unchangeable specification.
- the virtual start time S is determined, which represents the start of a Bluetooth frame. The determination of this starting time S can be determined by evaluating the Bluetooth signal curve. If a synchronization signal from the Bluetooth transmitter is available, this signal can be used immediately for the synchronization of the WDCT connection to the Bluetooth connection.
- the end of the WDCT slot event in slot 3 then coincides approximately with the entry of the third Bluetooth slot event just mentioned.
- the WDCT connection uses slots 5, 6 and 9 to receive data relating to the connections mentioned. Slots 7 and 8 remain unused because there would be significant overlaps with Bluetooth slot events.
- the dynamic distribution is continued in a respectively adapted form in the two following frames (areas B and C), with the signal curve from the end of the third frame appearing again as from the start time S.
- a slot adaptation is shown which is used in the situation just described in order to easily change the slot change sequence used by a transmitter, for example a base station, by means of which to determine the dummy bearer being sent.
- a receiver for example a handset
- the receiver After a receiver, for example a handset, has received an identity message, it is now necessary to determine the dummy bearer from the transmitted signal sequence.
- the receiver only knows that the dummy bearer is located in a slot of the subframe TX, that is to say in one of the slots 0 to slot 4.
- the receiver opens in this example five receiving slots (R0 to R4) and checks the input of a dummy bearer for each slot.
- the dummy bearer is sent by the transmitter in slot 0.
- the receiver then defines the slot in which the dummy bearer was received as slot 2. It is therefore possible for two further reception slots to be available on both sides of slot 2.
- the dummy bearer is sent by the transmitter in slot 4.
- the receiver defines slot 2 so that two further reception slots are available on both sides of the slot in which the dummy bearer was received.
- the handset receives an identity message from the base station.
- the handset After a time synchronization of the slots of the handset to the base station, the handset first defines R2 (slot 2) as the receiving slot.
- the slot position of the dummy bearer of the base station is determined for each frame using the information obtained from the five receiving slots. This can then be used to determine which slot change sequence the base station is using.
- FIG. 3 shows a transmission device 10 for the simultaneous operation of at least two wireless connecting links 12, 14, the first connecting link 12 after the WDCT
- Transmission method and the second link 14 is operated according to the Bluetooth transmission method.
- the transmission device 10 has a data preparation device 16, a slot allocation device 18 and a transmitter 20.
- data are processed in accordance with the WDCT standard and forwarded to the slot allocation device 18.
- the data packets are distributed to specific slots in accordance with the method described above.
- the data packets arranged in this way are forwarded to the transmitter 20 and transmitted to the receiving device 22 by means of the first connecting link 12.
- the receiving device 22 has a receiver 24, a ne slot evaluation device 26 and a data processing device 28. After the data packets transmitted by the first link 12 have been received by the receiver 24, they arrive at the slot evaluation device 26.
- the slots specified from the slot change sequence are evaluated and their data packets assigned to a specific connection.
- the data processed in this way are then forwarded by the slot evaluation device 26 to the data processing device 28, where they are processed in a known manner in accordance with the WDCT standard.
- the transmitting device 10 or receiving device 22 described here represents an inexpensive solution that does not require any additional costs due to additional devices (for example an HF filter).
- additional devices for example an HF filter.
- a robust algorithm is used, which can be implemented without continuous signaling of the slot change sequence.
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- Engineering & Computer Science (AREA)
- Computer Networks & Wireless Communication (AREA)
- Signal Processing (AREA)
- Mobile Radio Communication Systems (AREA)
Abstract
Description
Claims
Priority Applications (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
CN2005800136316A CN1951134B (zh) | 2004-04-30 | 2005-03-02 | 同时运行至少两条无线连接路径的方法和装置 |
US11/568,503 US20070223441A1 (en) | 2004-04-30 | 2005-03-02 | Method And Device For The Concurrent Operation Of At Least Two Wireless Link Paths |
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE102004021342A DE102004021342B4 (de) | 2004-04-30 | 2004-04-30 | Verfahren und Vorrichtung zum zeitgleichen Betrieb mindestens zweier drahtloser Verbindungsstrecken |
DE102004021342.9 | 2004-04-30 |
Publications (1)
Publication Number | Publication Date |
---|---|
WO2005107300A1 true WO2005107300A1 (de) | 2005-11-10 |
Family
ID=34961663
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
PCT/EP2005/050913 WO2005107300A1 (de) | 2004-04-30 | 2005-03-02 | Verfahren und vorrichtung zum zeitgleichen betrieb mindestens zweier drahtloser verbindungsstrecken |
Country Status (4)
Country | Link |
---|---|
US (1) | US20070223441A1 (de) |
CN (1) | CN1951134B (de) |
DE (1) | DE102004021342B4 (de) |
WO (1) | WO2005107300A1 (de) |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
EP2575295A1 (de) * | 2011-09-27 | 2013-04-03 | Siemens Aktiengesellschaft | Verfahren zum Betrieb eines Automatisierungsgeräts zum Vermeiden von Datenverlusten und entsprechendes Datenübertragungsverfahren |
Families Citing this family (7)
Publication number | Priority date | Publication date | Assignee | Title |
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US20070056253A1 (en) * | 2005-09-15 | 2007-03-15 | Juris Terauds | Vacuum cleaner cartridge filter turbine |
US8412097B2 (en) * | 2005-09-16 | 2013-04-02 | Sony Ericsson Mobile Communications Ab | Methods, electronic devices, and computer program products for coordinating bluetooth and wireless local area network communication |
US9035829B2 (en) * | 2008-09-10 | 2015-05-19 | Nextnav, Llc | Wide area positioning systems and methods |
US20100130129A1 (en) * | 2008-11-25 | 2010-05-27 | Jue Chang | WLAN and bluetooth harmonization |
CA2839749A1 (en) * | 2011-06-28 | 2013-01-03 | Arun Raghupathy | Wide area positioning systems and methods |
EP2575280A1 (de) * | 2011-09-27 | 2013-04-03 | Siemens Aktiengesellschaft | Verfahren zum Betrieb eines Automatisierungsgeräts zum Vermeiden von Datenverlusten sowie entsprechendes Datenübertragungsverfahren |
WO2023038303A1 (ko) * | 2021-09-08 | 2023-03-16 | 삼성전자 주식회사 | 무선 환경 내에서 외부 전자 장치들로의 송신을 관리하기 위한 전자 장치, 방법, 및 컴퓨터 판독가능 저장 매체 |
Citations (2)
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EP1119137A1 (de) * | 2000-01-20 | 2001-07-25 | Lucent Technologies Inc. | Interoperabilität von Bluetooth und IEEE 802.11 |
EP1227602A1 (de) * | 2001-01-24 | 2002-07-31 | Lucent Technologies Inc. | Verfahren zur dynamischen Zuweisung von Zeitschlitzen in einem TDD Kommunikationssystem |
Family Cites Families (12)
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USRE39116E1 (en) * | 1992-11-02 | 2006-06-06 | Negotiated Data Solutions Llc | Network link detection and generation |
US7164704B1 (en) * | 1999-12-09 | 2007-01-16 | Texas Instruments Incorporated | Beam forming for transmit using bluetooth modified hopping sequences (BFTBMH) |
WO2001061883A2 (en) * | 2000-02-17 | 2001-08-23 | Pinpoint Corporation | Method and apparatus for integrating wireless communication and asset location |
US9094226B2 (en) * | 2000-08-30 | 2015-07-28 | Broadcom Corporation | Home network system and method |
WO2002025832A2 (en) * | 2000-09-22 | 2002-03-28 | Siemens Information And Communication Mobile Llc | System and method for avoiding interference in spread spectrum systems |
EP1348271A4 (de) * | 2000-10-06 | 2006-05-10 | Cognio Inc | Systeme und verfahren zur milderung von störungen zwischen mehreren wlan-protokollen |
EP1338125A2 (de) * | 2000-11-03 | 2003-08-27 | AT & T Corp. | Vielfachzugriff mit gestufter konkurrenz: ein verfahren für prioritätsbasierten zugriff auf einen geteilten kanal |
US7274725B2 (en) * | 2000-12-28 | 2007-09-25 | Siemens Communications, Inc. | System and method for adaptive carrier occupancy in a frequency hopping spread spectrum system |
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2004
- 2004-04-30 DE DE102004021342A patent/DE102004021342B4/de not_active Expired - Fee Related
-
2005
- 2005-03-02 US US11/568,503 patent/US20070223441A1/en not_active Abandoned
- 2005-03-02 WO PCT/EP2005/050913 patent/WO2005107300A1/de active Application Filing
- 2005-03-02 CN CN2005800136316A patent/CN1951134B/zh not_active Expired - Fee Related
Patent Citations (2)
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EP1119137A1 (de) * | 2000-01-20 | 2001-07-25 | Lucent Technologies Inc. | Interoperabilität von Bluetooth und IEEE 802.11 |
EP1227602A1 (de) * | 2001-01-24 | 2002-07-31 | Lucent Technologies Inc. | Verfahren zur dynamischen Zuweisung von Zeitschlitzen in einem TDD Kommunikationssystem |
Non-Patent Citations (1)
Title |
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Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
EP2575295A1 (de) * | 2011-09-27 | 2013-04-03 | Siemens Aktiengesellschaft | Verfahren zum Betrieb eines Automatisierungsgeräts zum Vermeiden von Datenverlusten und entsprechendes Datenübertragungsverfahren |
Also Published As
Publication number | Publication date |
---|---|
CN1951134A (zh) | 2007-04-18 |
DE102004021342B4 (de) | 2006-06-29 |
DE102004021342A1 (de) | 2005-11-24 |
US20070223441A1 (en) | 2007-09-27 |
CN1951134B (zh) | 2011-09-21 |
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