WO2015131493A1 - Procédé de découverte de dispositif et appareil de découverte de dispositif pour une communication de dispositif à dispositif (d2d) - Google Patents

Procédé de découverte de dispositif et appareil de découverte de dispositif pour une communication de dispositif à dispositif (d2d) Download PDF

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Publication number
WO2015131493A1
WO2015131493A1 PCT/CN2014/084318 CN2014084318W WO2015131493A1 WO 2015131493 A1 WO2015131493 A1 WO 2015131493A1 CN 2014084318 W CN2014084318 W CN 2014084318W WO 2015131493 A1 WO2015131493 A1 WO 2015131493A1
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WO
WIPO (PCT)
Prior art keywords
resource unit
interference
device discovery
resource
signal
Prior art date
Application number
PCT/CN2014/084318
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English (en)
Chinese (zh)
Inventor
郭胜祥
Original Assignee
中兴通讯股份有限公司
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
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Application filed by 中兴通讯股份有限公司 filed Critical 中兴通讯股份有限公司
Publication of WO2015131493A1 publication Critical patent/WO2015131493A1/fr

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Classifications

    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W8/00—Network data management
    • H04W8/005—Discovery of network devices, e.g. terminals
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W48/00—Access restriction; Network selection; Access point selection
    • H04W48/16—Discovering, processing access restriction or access information
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W76/00—Connection management
    • H04W76/10—Connection setup
    • H04W76/14—Direct-mode setup

Definitions

  • the present invention relates to the field of wireless communications, and in particular, to a device discovery method and apparatus for D2D communication.
  • Background Art In order to make full use of existing spectrum resources, the Third Generation Partnership Project (Third Generation Partnership)
  • D2D device-to-device
  • D2D communication An important technology and premise of D2D communication is the mutual discovery process between D2D user equipments, that is, the D2D device discovery process.
  • the cellular network completes its device discovery process by assigning a dedicated probe resource to each D2D user.
  • the disadvantage of this method is that the cellular network is heavily burdened and needs to ensure that the probe resources cannot be interfered during the device discovery period. And more importantly, this method is not suitable for non-cellular networks.
  • Another consideration is: To configure or preset candidate resources for all D2D devices, the D2D user randomly selects the required probe resources from the candidate resources to complete the device discovery process. This approach reduces or does not require network side involvement and is therefore also suitable for non-cellular network conditions.
  • Embodiments of the present invention provide a device discovery method and device for D2D communication, so as to at least solve the problem that the device discovery success rate caused by signal interference and collision occurring in the D2D device discovery process in the prior art is reasonable. Utilize resources for device discovery.
  • the present invention provides a device discovery method for D2D communication, which is used in a mobile communication terminal, and the mobile communication terminal can transmit a sounding signal for device discovery by using a resource unit in a candidate resource set
  • the device The discovery method includes: a receiving step, selecting a device discovery subframe in the device discovery period, and using the selected device discovery subframe to receive signals on all resource units; determining steps, determining interference parameters on each resource unit
  • the interference parameter reflects the interference degree of the signal on the newly added detection signal in the corresponding resource unit; the determining step, according to the interference parameter, determining whether there is a resource whose interference degree is smaller than the interference parameter of the first resource unit a unit set, a judgment result, where the first resource unit is a resource unit that the mobile communication terminal transmits a sounding signal at a time; and a first performing step, the determining result indicates that the interference level is greater than the first resource unit When the interference parameter is small, the resource unit is collected, The second resource unit is selected as the resource unit
  • the interference parameter is power on the resource unit, and the higher the power on the resource unit, the larger the interference parameter on the resource unit.
  • said signal comprises all sounding signals occupying said resource unit; said power comprising power of said all sounding signals occupying said resource unit.
  • the signal further comprises an interference signal occupying the resource unit; the power further comprising power of the interference signal occupying the resource unit.
  • the device discovery method further includes: a second performing step, when the determining result indicates that there is no resource unit set having a smaller interference level than the interference parameter of the first resource unit, still using the first resource The unit is the resource unit for the next transmission of the sounding signal.
  • the receiving step is specifically: selecting, in a device discovery period, a device discovery subframe in each ⁇ device discovery subframe connection, as a device discovery subframe that receives signals on all resource units, and The selected frame discovery subframe receives signals on all resource units, where K is an integer greater than or equal to two.
  • the present invention also provides a device discovery apparatus for D2D communication, which is used in a mobile communication terminal, and the mobile communication terminal is capable of transmitting a sounding signal for device discovery by using a resource unit in a candidate resource set
  • the device discovery apparatus comprising: receiving a module, in a device discovery period, selecting a device discovery subframe, and using the selected device discovery subframe to receive signals on all resource units; determining a module, determining interference parameters on each resource unit, the interference parameter Determining the degree of interference of the signal on the corresponding resource unit to the newly added detection signal; the determining module, according to the interference parameter, determining whether there is a resource unit set having a smaller interference level than the interference parameter of the first resource unit, acquiring one a judgment result, the first resource unit is a resource unit that the mobile communication terminal transmits a sounding signal at a time; the first execution module indicates, in the determination result, that the interference level is greater than the interference parameter of the first resource unit When a small resource unit is aggregated, from the resource unit set
  • the interference parameter is power on the resource unit, and the higher the power on the resource unit, the larger the interference parameter on the resource unit.
  • the device discovery device further includes: a second execution module, when the determination result indicates that there is no resource unit set that is less than the interference parameter of the first resource unit, the first resource is still The unit is the resource unit for the next transmission of the sounding signal.
  • FIG. 1 is a schematic flowchart diagram of a device discovery method for D2D communication according to an embodiment of the present invention
  • 2 is a schematic structural diagram of a device discovery device for D2D communication according to an embodiment of the present invention
  • FIG. 3 is another schematic flowchart of a device discovery method for D2D communication according to an embodiment of the present invention
  • a schematic diagram of a device discovery cycle. DETAILED DESCRIPTION OF THE EMBODIMENTS In order to make the technical problems, technical solutions and beneficial effects to be solved by the present invention more clearly, the following detailed description will be made with reference to the accompanying drawings and specific embodiments.
  • FIG. 1 is a schematic flowchart diagram of a device discovery method for D2D communication according to an embodiment of the present invention. As shown in FIG.
  • the device discovery method of the D2D communication in the foregoing embodiment is performed by comparing the interference parameter indicating the degree of interference on the resource unit of the current detection signal with the interference parameter on the remaining resource units during the device discovery period.
  • the resource unit with a small interference parameter is used as a resource unit for transmitting the detection signal next time.
  • the interference parameter may be power on the resource unit, and the higher the power on the resource unit, the larger the interference parameter on the resource unit.
  • said signal comprises all sounding signals occupying said resource unit; said power comprising power of said all sounding signals occupying said resource unit.
  • the D2D device discovery process is implemented by transmitting a sounding signal on a resource unit. The lower the power of the sounding signal occupying the resource unit is, the smaller the interference received by the resource unit is, the more suitable the resource unit is to transmit the sounding signal. Resources, the higher the success rate of device discovery.
  • the interference of the resource unit is only derived from the detection signal occupying it. In an actual situation, the interference on the resource unit may come from multiple parties.
  • the signal further comprises an interference signal occupying the resource unit; the power further comprising power of the interference signal occupying the resource unit.
  • the interference signal may come from the interference of the user of the cellular network, or may be caused by the interference of the communication between the users of the D2D itself. Taking the interference source on the resource unit as a whole, the power measurement can be more accurate and more realistic. The resource unit thus found that can transmit the next detection signal is more accurate, and the success rate found by the D2D device is also higher.
  • the device discovery method further includes: a second performing step, when the determining result indicates that there is no resource unit set having a smaller interference level than the interference parameter of the first resource unit, still using the first resource
  • the unit is the resource unit for the next transmission of the sounding signal.
  • the probe signal is continuously transmitted in the original resource unit to continue the device discovery process.
  • the D2D user in the embodiment of the present invention is a time division duplex user, that is, a D2D user in a device discovery subframe may only be in a state of transmitting a detection signal or accepting a detection signal, so that the process of receiving and transmitting is not performed.
  • the receiving step 101 is specifically: selecting, in the device discovery period, a device discovery subframe in each K device discovery subframe connection, as a device discovery subframe that receives signals on all resource units. And using the selected device discovery subframe to receive signals on all resource units, where K is an integer greater than or equal to 2.
  • K is an integer greater than or equal to 2.
  • the present invention further provides a device discovery apparatus for D2D communication, which is used in a mobile communication terminal, and the mobile communication terminal is capable of transmitting a sounding signal for device discovery by using a resource unit in a candidate resource set
  • the device discovery device includes: a receiving module, in the device discovery period, selecting a device discovery subframe, and using the selected device discovery subframe to receive signals on all resource units; determining a module, determining interference on each resource unit a parameter, the interference parameter reflects an interference degree of the signal on the corresponding resource unit to the newly added detection signal; the determining module determines, according to the interference parameter, whether the interference level is smaller than the interference parameter of the first resource unit a set of resource units, obtaining a judgment result, where the first resource unit is a resource unit that the mobile communication terminal transmits a sounding signal at a time; the first execution module, indicating that the interference level is greater than the first resource When the unit of the interference parameter is small, the resource unit is collected from the resource Selecting a second set of resource unit as
  • the interference parameter is power on the resource unit, and the higher the power on the resource unit, the larger the interference parameter on the resource unit.
  • the device discovery device further includes: a second execution module, when the determination result indicates that there is no resource unit set that is less than the interference parameter of the first resource unit, the first resource is still The unit is the resource unit for the next transmission of the sounding signal.
  • the device discovery device of the D2D communication in the embodiment by using the configuration of each module, finds a resource unit with a relatively small interference parameter as a resource unit for transmitting a sounding signal, and allocates resources reasonably, thereby reducing signal interference. The problem of low success rate of equipment discovery caused by collision. FIG.
  • FIG. 3 is another schematic flowchart of a device discovery method for D2D communication according to an embodiment of the present invention.
  • the device discovery method for D2D communication provided in this embodiment is used for a mobile communication terminal, and the mobile communication terminal can transmit a sounding signal for device discovery by using a resource unit in a candidate resource set, the D2D
  • the device discovery method for communication specifically includes: Receiving step 201, in the device discovery period, selecting a device discovery subframe in each K device discovery subframe connection, and using the device discovery subframe to receive signals on all resource units, where K is an integer greater than or equal to 2.
  • . 4 is a schematic diagram of a device discovery cycle according to an embodiment of the present invention. As shown in FIG. 3 and FIG.
  • a device discovery period is composed of multiple device discovery subframes, and each device discovery subframe includes a cellular network user resource and a candidate resource for device discovery for D2D communication.
  • each device discovery subframe may be a single 1 ms subframe of the LTE system, or may be composed of multiple LTE system single subframes.
  • the candidate resource amount in each device discovery subframe may be given in the form of a Resource Block (RB) in the LTE system, for example, a candidate for device discovery for D2D communication in each device discovery subframe.
  • the resource is 44 RBs.
  • the resource unit refers to a candidate resource occupied by a single D2D user transmitting a sounding signal.
  • a resource unit can be a resource block occupying 2 LTE systems.
  • the size of the resource units occupied by different D2D users may be the same or different.
  • the candidate resource is a resource that all D2D users can use in a device discovery cycle, and is not a resource exclusive to a D2D user. The D2D user can select the required resource unit from the device discovery.
  • the value of K in the receiving step 201 may be preset by the mobile communication terminal or may be specified by the cellular network side. Considering that the D2D user in this embodiment is a time division duplex user, the K value range is limited to an integer greater than or equal to 2, so that the selected device discovery subframe for receiving signals on all resource units is selected. Available.
  • the signals on all of the received resource units include not only signals on other resource units, but also signals on resource units that transmit the sounding signals.
  • the signal includes all sounding signals and interference signals occupying the resource unit.
  • Step 202 is determined to determine the power on each resource unit. Specifically, the power on each resource unit is determined according to the received signal strength on each of the resource units.
  • the power includes power of the all sounding signals occupying the resource unit and power of the interference signal.
  • step 203 it is determined whether there is a resource unit set whose power is lower than the power of the first resource unit by X dB, and a judgment result is obtained, where the first resource unit is a resource unit that the mobile communication terminal transmits the sounding signal this time;
  • the power level on a resource unit reflects the degree of interference received by the resource unit. The higher the power in the resource unit, the greater the interference received by the resource unit, and the weaker the transmission capability; otherwise, the resource unit The lower the power, the smaller the interference that the resource unit is subjected to, and the stronger its transmitting capability.
  • the value of the value of X may be preset by the mobile communication terminal, or may be configured by the cellular network side.
  • X may be configured to be 6 dB.
  • the determining step 203 is intended to find out whether there is a resource unit set of resource units whose transmission capability is better than that of the current transmission sounding signal.
  • a first execution step 204 when the determination result indicates that there is a resource unit set whose power is lower than the power of the first resource unit by XdB, the second resource unit is selected from the resource unit set as the next transmission detection.
  • the resource unit of the signal when the determination result indicates that there is a resource unit set whose power is lower than the power of the first resource unit by XdB, the second resource unit is selected from the resource unit set as the next transmission detection.
  • the resource unit of the signal when the determination result indicates that there is a resource unit set whose power is lower than the power of the first resource unit by XdB, the second resource unit is selected from the resource unit set as the next transmission detection
  • the second execution module 205 when the determination result indicates that there is no resource unit set whose power is lower than the power of the first resource unit by X dB, still uses the first resource unit as a resource unit of the next transmission detection signal.
  • the resource unit whose transmission capability is better than or equal to the current detection signal is found in steps 204 and 205 as a resource for transmitting the detection signal next time.
  • the process of step 201 205 is repeated until the device discovery cycle ends. In this way, not only the candidate resources are allocated reasonably, but also the problem of low success rate of device discovery caused by signal interference and collision is reduced.
  • a device discovery method and apparatus for D2D communication provided by an embodiment of the present invention have the following beneficial effects:
  • the discovery of a D2D device is found by finding a resource unit having a small interference parameter as a resource for transmitting a detection signal. In the process, due to signal interference and collision, the success rate of device discovery is low, and the candidate resources are allocated reasonably, which increases the success rate of D2D device discovery.

Abstract

La présente invention concerne un procédé de découverte de dispositif et un appareil de découverte de dispositif pour une communication de dispositif à dispositif (D2D), qui sont utilisés pour des terminaux de communication mobile. Le procédé comprend : une étape de réception, consistant notamment à sélectionner une sous-trame de découverte de dispositif et à recevoir des signaux de toutes les unités de ressources par l'utilisation de la sous-trame de découverte de dispositif dans un cycle de découverte de dispositif; une étape de détermination, consistant notamment à déterminer des paramètres de brouillage pour chaque unité de ressources; une étape d'évaluation, consistant notamment à juger s'il y a ou non un ensemble d'unités de ressources dont le degré de brouillage est inférieur aux paramètres de brouillage d'une première unité de ressources et à obtenir un résultat d'évaluation; et une première étape de réalisation dans laquelle, lorsque le résultat d'évaluation indique qu'un ensemble d'unités de ressources dont le degré de brouillage est inférieur aux paramètres de brouillage de la première unité de ressources existe, une seconde unité de ressources est sélectionnée, parmi l'ensemble d'unités de ressources, comme unité de ressources des signaux de sonde de lancement suivants. Par la présente invention, le problème selon lequel le taux de réussite de découverte de dispositif est faible en raison de brouillages de signaux et de collisions de signaux dans le processus de découverte du dispositif D2D est résolu, et les ressources candidates sont attribuées rationnellement, et le taux de réussite de découverte de dispositif D2D est accru.
PCT/CN2014/084318 2014-03-06 2014-08-13 Procédé de découverte de dispositif et appareil de découverte de dispositif pour une communication de dispositif à dispositif (d2d) WO2015131493A1 (fr)

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CN201410081256.XA CN104902455A (zh) 2014-03-06 2014-03-06 一种d2d通信的设备发现方法及装置
CN201410081256.X 2014-03-06

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Publication number Priority date Publication date Assignee Title
CN107734649A (zh) * 2016-08-11 2018-02-23 中兴通讯股份有限公司 一种v2x通信的资源选择方法和装置
CN108112036B (zh) * 2016-11-25 2021-09-28 普天信息技术有限公司 车联网资源的感知方法、终端及基站
CN108633049B (zh) * 2017-03-24 2021-09-28 中兴通讯股份有限公司 一种资源选择方法及装置、资源配置方法及装置
WO2022027592A1 (fr) * 2020-08-07 2022-02-10 Mediatek Singapore Pte. Ltd. Amélioration de détection partielle pour l'attribution de ressources sl

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN103229582A (zh) * 2012-12-24 2013-07-31 华为技术有限公司 资源竞争的方法、利用资源竞争的方法及其装置
CN103250452A (zh) * 2012-12-31 2013-08-14 华为技术有限公司 邻近身份指示码的发送方法、用户设备及基站
CN103338497A (zh) * 2013-06-14 2013-10-02 北京交通大学 一种d2d通信系统中自主设备发现方法

Family Cites Families (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2010125427A1 (fr) * 2009-04-30 2010-11-04 Nokia Corporation Procédé et appareil permettant de gérer une interférence de dispositif à dispositif
KR20120009772A (ko) * 2010-07-21 2012-02-02 삼성전자주식회사 Ｍ２ｍ 통신 시스템에서의 간섭 완화를 위한 시그널링 방법 및 디바이스
EP2665321B1 (fr) * 2012-05-15 2017-03-22 Telefonaktiebolaget LM Ericsson (publ) Appareil et procédé permettant d'établir une communication de dispositif à dispositif
CN103428712B (zh) * 2012-05-16 2016-08-10 华为技术有限公司 一种侦听方法和节点

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN103229582A (zh) * 2012-12-24 2013-07-31 华为技术有限公司 资源竞争的方法、利用资源竞争的方法及其装置
CN103250452A (zh) * 2012-12-31 2013-08-14 华为技术有限公司 邻近身份指示码的发送方法、用户设备及基站
CN103338497A (zh) * 2013-06-14 2013-10-02 北京交通大学 一种d2d通信系统中自主设备发现方法

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