WO2016132084A1 - Procédés d'émission et de réception de messages descendants avec identification implicite de destinataires - Google Patents
Procédés d'émission et de réception de messages descendants avec identification implicite de destinataires Download PDFInfo
- Publication number
- WO2016132084A1 WO2016132084A1 PCT/FR2016/050387 FR2016050387W WO2016132084A1 WO 2016132084 A1 WO2016132084 A1 WO 2016132084A1 FR 2016050387 W FR2016050387 W FR 2016050387W WO 2016132084 A1 WO2016132084 A1 WO 2016132084A1
- Authority
- WO
- WIPO (PCT)
- Prior art keywords
- message
- terminal
- data
- identifier
- downlink
- Prior art date
Links
Classifications
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W72/00—Local resource management
- H04W72/20—Control channels or signalling for resource management
- H04W72/23—Control channels or signalling for resource management in the downlink direction of a wireless link, i.e. towards a terminal
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L1/00—Arrangements for detecting or preventing errors in the information received
- H04L1/004—Arrangements for detecting or preventing errors in the information received by using forward error control
- H04L1/0056—Systems characterized by the type of code used
- H04L1/0061—Error detection codes
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W4/00—Services specially adapted for wireless communication networks; Facilities therefor
- H04W4/70—Services for machine-to-machine communication [M2M] or machine type communication [MTC]
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W88/00—Devices specially adapted for wireless communication networks, e.g. terminals, base stations or access point devices
- H04W88/02—Terminal devices
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W88/00—Devices specially adapted for wireless communication networks, e.g. terminals, base stations or access point devices
- H04W88/08—Access point devices
Definitions
- the reception method may further comprise one or more of the following characteristics, taken separately or in any technically possible combination.
- FIG. 3 a diagram illustrating the main steps of a method of receiving a descending message.
- FIG. 1 schematically represents a wireless communication system 10, for example of the UNB type, comprising several terminals 20 and an access network 30 comprising several base stations 31.
- the terminals 20 are adapted to transmit uplink messages on a uplink link to the access network 30.
- the uplink messages are for example transmitted asynchronously.
- asynchronously transmitting is meant that the terminals 20 autonomously determine when they transmit, without coordination of said terminals 20 to each other and to the base stations 31 of the access network 30.
- Each base station 31 is adapted to receive the upstream messages of the terminals 20 which are within range.
- Each incoming message thus received is for example transmitted to a server 32 of the access network 30, possibly accompanied by other information such as an identifier of the base station 31 which received it, the measured power of said received message amount, the date of receipt of said amount message, etc.
- the server 32 processes all the received messages received from the different base stations 31.
- the access network 30 is also adapted to transmit, via the base stations 31, descendant messages on a downlink to the terminals 20, which are adapted to receive them.
- the downstream messages are for example issued at the initiative of the access network 30.
- the terminals 20 must constantly listen to the downlink, waiting for a possible downlink message.
- the access network 30 can also send a downlink message in response to each received amount message, or send down messages only in response to certain upstream messages.
- the access network 30 may respond only after having received a predefined number of upstream messages from the same terminal 20, or responding only to upstream messages comprising a request for this purpose, etc.
- the terminal 20 After the idle window, the terminal 20 leaves the standby mode to listen to the downlink waiting for a downward message, on a listening window of predetermined duration equal to or greater than the duration of the descending message to be received. access network. Since the terminal 20 only listens for the downlink on a listening window of limited duration, the number of downstream messages that can be detected by said terminal 20, including downlink messages that are not intended for it, is greatly reduced compared to the case where the terminal 20 could receive messages descending at any time.
- a terminal 20 if a terminal 20 knows a priori that no downlink message will be transmitted by the access network 30 (for example because the amount message it has sent does not include a request for this purpose ), then said terminal 20 does not listen to the downlink, and preferably remains in standby mode, for example until the transmission of the next upstream message.
- each terminal 20 when it must receive a descending message, knows a priori on which central frequency this descending message will be sent.
- the terminal 20 can listen to a frequency band centered on this central frequency, of limited width of the order of the spectral width of the descending message, for example twice as large as the spectral width of said downward message (to take account of a inaccuracy on the synthesis of the central frequency, the frequency drift of the frequency synthesis means, a possible Doppler effect, etc.).
- the central frequency of the downlink message is determined from the central frequency of the upstream message in response to which said downstream message is to be transmitted. Therefore, at the access network 30, the central frequency of the upstream message is measured, and the central frequency on which the downstream message is to be transmitted is determined according to the measurement of the central frequency of the upstream message, for example according to a predefined frequency offset for the terminal having sent the rising message.
- the transmission method 50 mainly comprises the following steps, which will be described in more detail below:
- the access network 30 comprises a set of means configured in software (specific computer program product) and / or hardware (FPGA, PLD, ASIC, etc.) to implement the different steps of the emission process 50.
- the main data is, from a protocol layer view of the communication systems, physical layer level data.
- Step 51 aims to generate error detection data from the main data to be transmitted to the destination terminal.
- the error detection data are intended to make it possible to check, at each terminal 20, the integrity of the main data extracted from a descending message.
- Said error detection data can be obtained according to any method known to those skilled in the art, for example by a cyclic redundancy check ("Cyclic Redundancy Check” or CRC in the English literature), by a function hash, etc.
- a cyclic redundancy check (“Cyclic Redundancy Check” or CRC in the English literature)
- CRC Cyclic Redundancy Check
- step 52 the main data and / or the error detection data is changed according to an identifier of the destination terminal, by means of a reversible predefined modification function.
- This modification is also carried out with a constant spectral width and a constant duration with respect to the main data and / or the error detection data. In other words, the change does not increase:
- the modification therefore does not introduce spreading of the frequency spectrum of the descending message with respect to the case where the step 52 of modification would not be executed,
- the modification therefore does not introduce an extension of the duration of the descending message with respect to the case where the modification step 52 would not be executed.
- the assembly consists of adding the error detection data following the main data, so that the duration of the assembled data corresponds to the sum respective durations of main data and error detection data.
- the main data and the error detection data are in the form of real (i.e. non-complex) symbol sequences, then they can be assembled so as to obtain assembled data presenting itself. in the form of a sequence of complex symbols, the real part of which for example corresponds to the main data and the complex part of which corresponds to the error detection data.
- the descendant messages obtained as a function of different identifiers of terminals 20 are necessarily different.
- - B corresponds to the sequence of data assembled
- - ID corresponds to the destination terminal identifier
- the editing function of the assembled data may advantageously correspond to a symbol symbol combination between said assembled data and said destination terminal identifier. means of an "exclusive" function.
- the modified data can be retrieved by combining symbol to symbol the downlink message and the identifier of said destination terminal by means of an "exclusive" function.
- the identifier of the destination terminal 20, used to modify the data assembled during the step 52 of editing the assembled data is a temporary identifier, which must be able to be determined by both the access network 30 and the terminal 20 recipient.
- the temporary identifier of the destination terminal 20 is determined from control data extracted from the amount message previously received from the destination terminal.
- the control data used to determine said temporary identifier is a permanent identifier of the destination terminal, a sequence number of the upstream message (i.e., a counter of upstream messages incremented by said destination terminal at each destination terminal). new issue of a rising message), etc.
- the temporary identifier of the destination terminal is obtained by shifting a predefined identification code known to both the access network 30 and the destination terminal 20.
- the same identification code is used for all terminals 20, which are optionally distinguished by the offset introduced, which is for example determined as a function of control data included in the amount message previously issued by said destination terminal.
- shifting of the identification code is meant the starting point from which the identification code is scanned to modify the assembled data. If the end of the identification code is reached before having finished modifying the assembled data, then the journey of the identification code is continued by resuming from the beginning of said identification code. Thus, different identifiers are obtained, from the same identification code, by browsing said identification code from different starting points.
- the same calculation function of the offset to be applied to obtain the temporary identifier is used for all the terminals 20, and is therefore known from said terminals 20.
- the identification code is a pseudo-random, for example binary, sequence generated by means of a predefined pseudo-random generator, and the calculated offset is used as a seed of said pseudo-random generator.
- the same pseudo-random generator is implemented, and the same function of calculating the offset (seed) to be applied is implemented.
- the transmission step 53 is performed at least partially by a base station 31 of the access network. More particularly, several operations may possibly be performed on the descending message, which are outside the scope of the invention.
- the assembled data obtained after modification are, for example, in baseband, and the base station 31 can translate them into frequencies in order to transmit the descending message on a central frequency determined for example from the measured central frequency of the uplink message. response to which said downlink message is to be transmitted.
- each terminal 20 comprises a processing module (not shown in the figures), comprising one or more processors and storage means (magnetic hard disk, electronic memory, optical disk, etc.) in which a program product is stored. computer, in the form of a set of program code instructions to be executed to implement the different steps of the receiving method 60.
- each processing module comprises one or more programmable logic circuits, of the FPGA, PLD, etc. type, and / or specialized integrated circuits (ASIC) adapted to implement all or part of said steps of the reception method 60.
- Each terminal 20 furthermore comprises wireless communication means, considered as known to those skilled in the art, enabling said terminal to send up messages and to receive descendant messages.
- each terminal 20 comprises a set of means configured in software (specific computer program product) and / or hardware (FPGA, PLD, ASIC, etc.) to implement the various steps of the method 60 reception.
- the reception method 60 firstly comprises a step 61 for the receiver 20 detecting the downlink message.
- the detection step 61 is mainly intended to find, in a radio signal measured on the downlink, a downlink message transmitted by the access network 30. Any detection method known to those skilled in the art can be implemented. artwork.
- the method 60 then comprises a step 62 of extracting data assembled by modifying the message downward according to a identifier of the receiver terminal 20, by means of the inverse function of the modification function used on transmission.
- the identifier of said receiving terminal is different from the identifier ID of said destination terminal.
- a sequence B 'of assembled data is obtained, different from the sequence B transmitted by the access network 30:
- the identifier of the receiving terminal 20 is a temporary identifier, which the receiving terminal 20 determines in the same way as the access network 30, for example as a function of data. control messages included in the amount message previously sent by said receiving terminal, in response to which a descending message must be sent.
- the receiving terminal 20 still does not know if the downlink message is intended for it.
- the fact that the receiver terminal only listens for the downlink on a predetermined listening window and / or around a predetermined central frequency makes it possible to reduce the probability for the receiving terminal to detect several downstream messages. . However, this does not ensure that only the descendant message intended for it will be detected. It is therefore necessary to determine, for each downlink detected by the receiver 20, whether this message detected descendant is intended for him.
- the reception method 60 comprises a step 63 of determining, as a function of the error detection data, whether the main data comprises errors.
- the identifier of the receiving terminal 20 corresponds to the identifier ID of the destination terminal
- the data sequence formed corresponds to the sequence B transmitted by the access network 30. Therefore, the main data and the data error detection of the sequence B are by construction coherent with each other, and no error is detected.
- the identifier ID 'of said receiving terminal is different from the identifier ID of said destination terminal, then the sequence B' of assembled data is different from the sequence B transmitted by the access network 30. In such a case , the main data and the error detection data extracted from the sequence B 'have no reason to be coherent with each other, and errors will in principle be detected.
- the receiving terminal 20 is considered to be the destination terminal of the said downward message, and the processing of the main data continues, for example to extract useful data.
- the receiving terminal 20 is not considered to be the destination terminal, and the processing of the downward message may stop.
Abstract
Description
Claims
Priority Applications (5)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
MX2017010562A MX369875B (es) | 2015-02-19 | 2016-02-19 | Metodos para transmitir y recibir mensajes de enlace descendente con identificacion implicita de recibidores. |
US15/551,277 US10314027B2 (en) | 2015-02-19 | 2016-02-19 | Method for transmitting and receiving downlink messages with implicit identification of recipients |
EP16713517.7A EP3259864A1 (fr) | 2015-02-19 | 2016-02-19 | Procédés d'émission et de réception de messages descendants avec identification implicite de destinataires |
CN201680011072.3A CN107258062A (zh) | 2015-02-19 | 2016-02-19 | 用于发送和接收具有隐式接收者标识的下行链路消息的方法 |
KR1020177026351A KR102482252B1 (ko) | 2015-02-19 | 2016-02-19 | 수신자의 암시적 식별을 가진 하향 링크 메시지를 송수신하는 방법 |
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
FR1551392A FR3033105B1 (fr) | 2015-02-19 | 2015-02-19 | Procedes d'emission et de reception de messages descendants avec identification implicite de destinataires |
FR1551392 | 2015-02-19 |
Publications (1)
Publication Number | Publication Date |
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WO2016132084A1 true WO2016132084A1 (fr) | 2016-08-25 |
Family
ID=53200117
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
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PCT/FR2016/050387 WO2016132084A1 (fr) | 2015-02-19 | 2016-02-19 | Procédés d'émission et de réception de messages descendants avec identification implicite de destinataires |
Country Status (7)
Country | Link |
---|---|
US (1) | US10314027B2 (fr) |
EP (1) | EP3259864A1 (fr) |
KR (1) | KR102482252B1 (fr) |
CN (1) | CN107258062A (fr) |
FR (1) | FR3033105B1 (fr) |
MX (1) | MX369875B (fr) |
WO (1) | WO2016132084A1 (fr) |
Citations (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US20130077594A1 (en) * | 2010-06-10 | 2013-03-28 | Lg Electronics Inc. | Communication method and communication apparatus for mtc in a wireless communication system |
US20130077583A1 (en) | 2011-09-26 | 2013-03-28 | Electronics And Telecommunications Research Institute | Resource allocating apparatus and method for machine type communication |
WO2014075239A1 (fr) | 2012-11-14 | 2014-05-22 | 华为技术有限公司 | Procédé de déclenchement et dispositif associé |
Family Cites Families (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US20040010746A1 (en) * | 2002-07-10 | 2004-01-15 | Lucas L. Victor | Forward error correction system for wireless communications |
KR101470648B1 (ko) * | 2008-09-24 | 2014-12-09 | 엘지전자 주식회사 | 다중 셀 협력적 무선통신 시스템에서 제어신호를 전송하는 방법 |
US8280391B2 (en) * | 2009-08-21 | 2012-10-02 | Samsung Electronics Co., Ltd. | Method and apparatus for identifying downlink message responsive to random access preambles transmitted in different uplink channels in mobile communication system supporting carrier aggregation |
KR20130033302A (ko) * | 2011-09-26 | 2013-04-03 | 한국전자통신연구원 | 사물통신 자원 할당 장치 및 방법 |
-
2015
- 2015-02-19 FR FR1551392A patent/FR3033105B1/fr active Active
-
2016
- 2016-02-19 WO PCT/FR2016/050387 patent/WO2016132084A1/fr active Application Filing
- 2016-02-19 US US15/551,277 patent/US10314027B2/en active Active
- 2016-02-19 EP EP16713517.7A patent/EP3259864A1/fr not_active Withdrawn
- 2016-02-19 CN CN201680011072.3A patent/CN107258062A/zh active Pending
- 2016-02-19 MX MX2017010562A patent/MX369875B/es active IP Right Grant
- 2016-02-19 KR KR1020177026351A patent/KR102482252B1/ko active IP Right Grant
Patent Citations (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US20130077594A1 (en) * | 2010-06-10 | 2013-03-28 | Lg Electronics Inc. | Communication method and communication apparatus for mtc in a wireless communication system |
US20130077583A1 (en) | 2011-09-26 | 2013-03-28 | Electronics And Telecommunications Research Institute | Resource allocating apparatus and method for machine type communication |
WO2014075239A1 (fr) | 2012-11-14 | 2014-05-22 | 华为技术有限公司 | Procédé de déclenchement et dispositif associé |
EP2914038A1 (fr) * | 2012-11-14 | 2015-09-02 | Huawei Technologies Co., Ltd. | Procédé de déclenchement et dispositif associé |
Also Published As
Publication number | Publication date |
---|---|
CN107258062A (zh) | 2017-10-17 |
FR3033105B1 (fr) | 2018-03-02 |
KR20170134382A (ko) | 2017-12-06 |
FR3033105A1 (fr) | 2016-08-26 |
MX2017010562A (es) | 2018-04-10 |
US20180035412A1 (en) | 2018-02-01 |
KR102482252B1 (ko) | 2022-12-27 |
US10314027B2 (en) | 2019-06-04 |
MX369875B (es) | 2019-11-25 |
EP3259864A1 (fr) | 2017-12-27 |
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