WO2014023847A1 - Procédé et système pour établir une communication de dispositif à dispositif - Google Patents

Procédé et système pour établir une communication de dispositif à dispositif Download PDF

Info

Publication number
WO2014023847A1
WO2014023847A1 PCT/EP2013/066818 EP2013066818W WO2014023847A1 WO 2014023847 A1 WO2014023847 A1 WO 2014023847A1 EP 2013066818 W EP2013066818 W EP 2013066818W WO 2014023847 A1 WO2014023847 A1 WO 2014023847A1
Authority
WO
WIPO (PCT)
Prior art keywords
user equipment
communication
base station
inactive
proximity
Prior art date
Application number
PCT/EP2013/066818
Other languages
English (en)
Inventor
Peter Rost
Andreas Maeder
Original Assignee
Nec Europe Ltd.
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 Nec Europe Ltd. filed Critical Nec Europe Ltd.
Publication of WO2014023847A1 publication Critical patent/WO2014023847A1/fr

Links

Classifications

    • 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 a method for establishing a device-to-device communication between at least two user equipment wherein at least one is connected to a base station.
  • the present invention further relates to a system for establishing a device-to- device communication between at least two user equipment wherein at least one is connected to a base station.
  • Such device-to-device communication may be applied in various areas, see for example in the non-patent literature of X. Wu, et.al., "FlashLinQ: A synchronous distributed scheduler for peer-to-peer ad hoc networks", in Proc. of 48 th Annual Allerton Conference on Communication, Control, and Computing, Monticello, IL, US, Oct. 2010, such as in an event of an emergency, in case of broken infrastructure and for social networking.
  • device-to-device communication causes additional interference in the mobile communication network, for example additional interferences are introduced for the uplink/downlink communication in the mobile communication network as well as towards the device-to-device communication.
  • Another drawback is that due to the additional interference higher latency may be applied which causes greater delays in case of an emergency.
  • a method for establishing a device-to-device communication between at least two user equipment, wherein at least one is connected to a base station is defined.
  • the method is characterized in that
  • the at least two user equipment establish a device-to-device communication between each other by using user equipment communication resources in inactive communication periods of the at least one user equipment during which no uplink and/or downlink data preferably between the respective user equipment and the corresponding base station, is transmitted.
  • a system for establishing a device-to-device communication between at least two user equipment is defined, wherein at least one user equipment is connected to a base station, preferably for performing with a method according to one of the claims 1 -20
  • the at least two user equipment are operable to establish a device-to-device communication between each other by using user equipment
  • the invention it has been recognized that by using unused communication resources for the device-to-device communication of one or more user equipment or mobile terminals a device-to-device communication can be efficiently provided. According to the invention it has been further recognized that since no uplink and/or downlink transmission from or to a base station to or from at least one of the user equipment are performed, interference of the device-to-device communication with the conventional communication between the user equipment and the base station is avoided respectively at least significantly reduced, particularly in cases of an emergency.
  • the present invention provides reusing otherwise unused resources in a preferably mobile communication system for direct communication of mobile terminals or user equipment with each other.
  • a device-to-device communication is established during switching periods of the at least one user equipment between downlink and uplink. This enables to establish a device-to-device communication in switching periods in which for example a central radio access point RAP and/or a user equipment switch from downlink operation to uplink operation or vice versa.
  • RAP central radio access point
  • This switching period may be necessary due to hardware restrictions and/or propagation time of signals, preferably in the wireless medium of a mobile communication network between a user equipment and a base station when switching the link direction.
  • the communication between the at least one user equipment and the corresponding base station is based on time- division duplex.
  • the inactive communication period corresponds to a time length of a switching frame, preferably to the guard period.
  • This switching frame may be introduced additionally to downlink subframes and uplink subframes, i.e. the guard period may preceeded by the downlink pilot time slot and succeeded by the uplink pilot time slot.
  • signaling for the device-to-device communication is received by the base station when performing device-to-device communication between two or more user equipment. Therefore the base station is informed about ongoing device-to-device communication within its communication range.
  • the base station may for example use the received information and provide the information to the operator of a mobile communication network. For example when in a certain place a plurality of device-to-device communication is performed, the mobile communication network operator may use this information to provide more base stations to provide a better quality of service and/or quality of experience for the users in that range.
  • the base station configures the availability of inactive communication periods. This enables an easy configuration of the usable amount of resources for device-to-device communication, in particular by an operator of the mobile communication network.
  • the base station uses a MAC and/or RRC message for configuring the availability of inactive communication periods.
  • MAC and/or RRC messages an easy implementation into existing communication networks is enabled, since already reliable and implemented messages for configuring can be used.
  • a base station in inactive communication periods of user equipment relays received messages via its own communication resources. For example when a device-to-device communication in case of an emergency is also received by a base station, the base station can also transmit the corresponding information to other user equipment being not joined in the device-to-device communication via the conventional communication between user equipment and the base station for the underlying mobile communication network..
  • a base station configures the availability of user equipment communication resources for device-to-device communication. Therefore centralized configuration of user equipment are possible by a mobile communication network operator. Via or the base station itself may for example decide that during the switching frames no device-to-device communication may be performed/allowed. Then the user equipment are not allowed to access its resources during the switching period. In particular user equipment that are scheduled during the switching period are preferably not scheduled during the first uplink resources of a normal base station operation.
  • an indication message is sent out by the user equipment during an inactive communication period including indication information, preferably warning indication information. This enables in a flexible way to inform other user equipment via device-to-device communication about for example an emergency when a warning indication information is received.
  • existing device-to-device communication is interrupted upon reception of a warning indication information.
  • a warning indication information This enables for example an adjacent user equipment to stop sending in the device-to-device resource region if defined in order to avoid interference.
  • Such indication messages may be provided between adjacent user equipment and towards the base station that for example an emergency message is in the transmission queue.
  • Such a indication information may be provided in form of a special preamble or a set of preambles which are exclusively reserved for the purpose of a warning message indication.
  • a base station upon reception of a warning indication information configures user equipment communication resources according to the received warning indication information.
  • a base station may configure priority scheduling of resources of the user equipment for transmission of the emergency message decreasing delay of sending out warning messages or emergency messages to a minimum.
  • the "normal" connection setup and radio resource configuration procedures can be circumvented reducing the aforementioned delay.
  • one of the user equipment in inactive communication periods transmits a and/or listens to, preferably periodically, uniquely identifiable proximity message which is sent out and/or received by another user equipment indicating the proximity of this user equipment.
  • This uniquely identifiable proximity message may be a preamble sent out in a switching frame.
  • the periodicity is adapted according to a density of user equipment in proximity. This enables to configure the periodicity according to surrounding user equipment within the proximity range of a user equipment. For example if the number of other user equipment being in the proximity range of a user equipment is high, then to avoid interference the periodicity of proximity messages to be sent out by a user equipment may be increased to avoid interference. Another option is to decrease the periodicity since when a great number of user equipment is within the proximity range a higher fluctuation of user equipment entering or leaving the proximity range of the user equipment is performed so the periodicity of proximity messages may be decreased, i.e. the proximity messages are sent out in shorter time intervals periodically to receive a actual picture of the user equipment being in the proximity range.
  • the proximity message includes further actions to be performed on a user equipment receiving the proximity message.
  • Actions to be performed may be for example to request a device-to-device connection to a user equipment within the proximity range, to exchange further data according to an application or according to a special use.
  • Further actions may be for example to store the information included in the proximity message for later use and/or to optimize transmission parameters of the user equipment receiving the proximity message. Even further the user may be informed about the proximity of a user equipment or of other users. Also the information may of course be simply ignored by the receiving user equipment.
  • information about the user equipment communication resources in inactive communication periods is transmitted to the network.
  • This enables for example to transmit switching frame communication capabilities of user equipment to a network for management aspects.
  • control and policing by a network operator may be provided, such as enabling or disabling device-to-device communication in inactive communication periods of user equipment.
  • the user equipment radio capability information may be transferred to the network and may be used by a network operator for managing efficient use of a network.
  • frequency sub-sampling is used in the device-to-device communication.
  • This enables for example to shorten symbols: by using only every Mth subcarrier of a communication system with a fast fourier transform size N.
  • the first M time samples are sufficient to reconstruct a full symbol, preferably an OFDM symbol.
  • This enables to reduce latency and complexity on the side of the transmitter of the symbols. For example in 3GPP LTE with long symbols they are unsuitable for communication with low latency.
  • a car-to-car communication as an example for a device-to- device communication only low complexity information is transmitted like "break" or the distance in meters to a car behind.
  • spreading sequences for the device- to-device communication are used.
  • lower latencies and a higher reliability of the communication resulting in a diversity gain are provided. For example in a car-to-car communication when all cars are transmitting simultaneously no one is able to decode the received messages anymore.
  • spreading sequences collisions can be resolved and signal path diversity can be exploited in order to improve the quality of a received signal.
  • device-to-device communication is performed using SC-OFDMA.
  • SC-OFDMA single carrier orthogonal frequency- division multiple access scheme like in uplink LTE the peak-to-average power ratio can be reduced and even further the applied interference to other user equipment can also be reduced.
  • the symbol size of symbols used in the device-to-device communication are adapted according to the available user equipment resources in the inactive communication periods and/or to the number of user equipment connected to a base station. This may be performed by using different setups allowing to adapt to the available number of resources during the switching interval and the number of user equipment currently connected to a base station. For example different physical and/or medium access control layer configurations can be used to adapt a cyclic prefix, the fast fourier transform size or a pilot pattern enhancing the flexibility. There are several ways how to design and further develop the teaching of the present invention in an advantageous way.
  • Fig. 1 shows part of a method according to a first embodiment of the present invention
  • Fig. 2a to 2c show part of a method according to a second embodiment of the present invention
  • Fig. 3 shows part of a method according to a third embodiment of the present invention.
  • Fig. 1 shows part of a method according to a first embodiment of the present invention.
  • Fig. 1 a time division duplex frame structure used by 3GPP LTE Release 10 according to 3GPP TS 36.21 1 , "PHY Channels and Modulation (Release 10)", Section 4 is shown.
  • TGP time period of the guard period GP
  • the guard period GP is located in a special subframe S of sub frames SF in a radio frame RF for the purpose of switching between uplink/downlink, which is introduced additionally to downlink subframes D and uplink subframes U.
  • the guard period GP is preceded by the downlink pilot time slot DwPTS and succeeded by the uplink pilot time slot UpPTS.
  • the following table shows different switching period setups based on 3GPP LTE and illustrates the available resources for transmission.
  • a cyclic prefix CP of 5.2 ⁇ which is the normal cycling prefix CP for LTE, and a sampling frequency of 15.38 MHz with a 10 MHz carrier bandwidth is assumed.
  • the guard period GP varies between 0.07 and 0.71 ms resulting in symbols to be used within the guard period GP varying between 5 and 52 symbols.
  • the bits respectively the bytes which can be transmitted during a guard period GP vary between 288 bits respectively 36 bytes and 2995 bits respectively 374 bytes.
  • Fig. 2a to 2c show part of a method according to a second embodiment of the present invention.
  • FIG. 2a to 2c the operational principle of switching frame communication in a scenario with two user equipment U 1 , U2 is shown.
  • a mobile communication network is working in the usual manner in the downlink DL and uplink UL transmission phases as it is shown in Fig. 2a respectively 2c.
  • a guard period GP in the switching subframe S is used for device-to-device transmissions as it is shown in Fig. 2b.
  • the dashed arrow between the transmitting user equipment UE1 and the base station BS indicates that the base station BS may also receive the transmitted signal sent by the user equipment UE1 which can be used for signaling or radio resource management optimizations.
  • corresponding frames used for downlink DL and uplink UL are shown wherein in the switching frame S a downlink pilot time slot is indicated with D and the corresponding uplink pilot time slot is indicated with U.
  • frequency sub-sampling in order to shorten symbols may be applied for the device-to-device communication.
  • a first number of time samples are sufficient to reconstruct an OFDM symbol. This may be used to reduce the latency and complexity at a transmitter.
  • spreading sequences can be applied in order to allow for diversity gain and random access resolution. By using spreading sequences in such a system a missing channel adaption may be counteracted by exploiting the available channel diversity. Furthermore, spreading sequences may be used for the resolution of random access collisions. Even further single carrier OFDM access as in the uplink of 3GPP LTE may be applied in order to reduce the peak-to-average power ratio and to control the applied interference to other user equipment.
  • a base station may for example perform the following controlling operations:
  • the base station BS may reconfigure the usable amount of resources within the switching frame using a MAC or RRC message, the base station BS may block or enable the use of the switching frame communication using appropriate RRC (re)configuration messages, - the base station BS may listen during the switching frame S and relay received messages from device-to-device communication using its own broadcast resources and
  • the base station BS may selectively (re)configure user equipment such that they are allowed or not allowed to access its resources during the switching period/frame S.
  • User equipment that are scheduled during the switching period are preferably not scheduled during the first uplink resources of the normal base station operation.
  • ITS intelligent transport systems
  • delay requirements for emergency warning messages are in the range of a few milliseconds.
  • UMTS, LTE, or WiMAX does not foresee direct communication between user equipment, emergency warning messages have to be sent to the base stations, to the mobile operator's core network and then back to the user equipment which is the intended receiver of the warning message, possibly located in the same cell.
  • device-to-device communication these inefficiencies could be mitigated which would be beneficial for the performance in terms of delay and resource consumption of the mobile communication network in general and the user equipment in particular.
  • time division duplex LTE switching frames S could be used in the following way: for indication towards adjacent user equipment and towards the base station that an emergency message is in the transmission queue, the use of a special preamble or set of preambles exclusively reserved for the purpose of warning message indication could be used.
  • the base station BS can configure priority scheduling of resources for transmission of the emergency message. Also a direct transmission of a short emergency message on a best-effort basis can be performed, thus circumventing connection setup and radio resource configuration procedures, and decreasing the delay to a minimum.
  • Switching frame communication can also be used for proximity detection and signaling.
  • Proximity-based services and device-to-device communication may be used in social networking to detect the proximity of friends, or in public security scenarios, see for example 3GPP, "TR 22.803 vO.3.0; Feasibility Study for Proimity Services (ProSe)", May 2012.
  • Cellular mobile communication networks including LTE do not support this feature, i.e. that a user equipment detects another user equipment in its proximity range.
  • Proximity means preferably that the user equipment is "being located in the communication range" of another user equipment.
  • communication in the TD-LTE switching frames S can be used to enable proximity detection in the following way:
  • the user equipment may periodically transmit a special uniquely identifiable preamble in the switching frame.
  • the periodicity may be configurable and may be adapted according to the density of a proximity-enabled user equipment.
  • the user equipment listens for pre-ambles of other user equipment.
  • the user equipment which transmitted said preamble is in communication range and therefore also in the proximity of the receiving user equipment.
  • the user equipment can now use the information which is encoded in the received preamble, which includes at least one unique identifier to perform further actions. Such actions may be
  • Fig. 3 shows part of a method according to a third embodiment of the present invention.
  • Fig. 3 a network attachment procedure with switching frame communication capability transfer and configuration in the E-UTRAN initial attach procedure as defined in 3GPP, "TS 23.401 V1 1.2.0; General Packet Radio Service (GPRS) enhancements for Evolved Universal Terrestrial Radio Access Network (E- UTRAN) access", Jun. 2012 is shown.
  • GPRS General Packet Radio Service
  • step 1 is modified as follows: when a user equipment initiates the Attach procedure by transmission to the evolved NodeB of an Attach Request (IMSI or old GUTI, Old GUTI type, last visited TAI (if available), UE Core Network Capability, UE Specific DRX parameters, SFC capability, Attach Type, ESM message container (Request Type, PDN Type, Protocol Configuration Options, Ciphered Options Transfer Flag), KS IASME, NAS sequence number, NAS-MAC, additional GUTI, P-TMSI signature, Voice domain preference and UE's usage setting, MS Network Capability) message together with RRC parameters indicating the Selected Network and the old GUMMEI the device-to-device communication capability information according to the switching frame communication of an embodiment of the present invention is included in the Attach Request.
  • an Attach Request IMSI or old GUTI, Old GUTI type, last visited TAI (if available), UE Core Network Capability, UE Specific DRX parameters, SFC capability, Attach Type, ESM message container (Request Type, P
  • the RRCConnectionReconfiguration message includes then configuration parameters for the switching frame communication, for example such as the number of fast fourier transform sampling size, preamble related information, cyclic prefix length or the like. Therefore the user equipment provides this information to the mobile communication network for managing of and by the mobile communication network. For example a mobile communication network operator may perform control and policing, such as enabling and disabling switching frame communication. Further, user equipment radio capability information is transferred to the network during the attachment procedure of the user equipment.
  • the present invention uses the otherwise unused switching/guard period in particular in a time-division-duplex communication system for a device- to-device communication.
  • the system efficiency can therefore be increased. Further interference in device-to-device communication, particularly in cases of emergency, could be avoided.

Landscapes

  • Engineering & Computer Science (AREA)
  • Computer Networks & Wireless Communication (AREA)
  • Signal Processing (AREA)
  • Mobile Radio Communication Systems (AREA)

Abstract

La présente invention concerne un procédé permettant d'établir une communication de dispositif à dispositif entre au moins deux équipements d'utilisateur, au moins un équipement d'utilisateur étant connecté à une station de base. Lesdits au moins deux équipements d'utilisateur établissent entre eux une communication de dispositif à dispositif à l'aide de ressources de communication dudit ou desdits équipements d'utilisateur durant des périodes sans communication durant lesquelles aucunes données de liaison montante et/ou de liaison descendante, de préférence entre ledit ou lesdits équipements d'utilisateur et la station de base correspondante, ne sont transmises. La présente invention concerne en outre un système permettant d'établir une communication de dispositif à dispositif.
PCT/EP2013/066818 2012-08-10 2013-08-12 Procédé et système pour établir une communication de dispositif à dispositif WO2014023847A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
EP12180144 2012-08-10
EP12180144.3 2012-08-10

Publications (1)

Publication Number Publication Date
WO2014023847A1 true WO2014023847A1 (fr) 2014-02-13

Family

ID=49165717

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/EP2013/066818 WO2014023847A1 (fr) 2012-08-10 2013-08-12 Procédé et système pour établir une communication de dispositif à dispositif

Country Status (1)

Country Link
WO (1) WO2014023847A1 (fr)

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN104602323A (zh) * 2015-01-12 2015-05-06 河海大学 一种基于干扰抑制的d2d通信系统的呼叫接入控制方法
WO2016193840A1 (fr) * 2015-06-03 2016-12-08 Telefonaktiebolaget Lm Ericsson (Publ) Transmission de messages hiérarchisés
CN106412801A (zh) * 2016-08-31 2017-02-15 西安电子科技大学 一种基于视频帧结构和d2d通信的视频多播方法
WO2021201731A1 (fr) * 2020-03-31 2021-10-07 Telefonaktiebolaget Lm Ericsson (Publ) Nœud de réseau, équipement utilisateur de dispositif à dispositif, et procédés dans un réseau de radiocommunication

Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20090016313A1 (en) * 2007-07-13 2009-01-15 Weihua Wu Method and apparatus for switching a communication channel
EP2120505A1 (fr) * 2008-05-07 2009-11-18 Fujitsu Limited Système et appareil d'attribution de ressources sans fil pour la communication entre véhicules et d'un véhicule avec la route
WO2011145857A2 (fr) * 2010-05-18 2011-11-24 한국전자통신연구원 Communication par connexion directe entre des terminaux et procédé permettant d'émettre et de recevoir directement des données entre des terminaux pour un relais de terminal
WO2012019348A1 (fr) * 2010-08-12 2012-02-16 Nokia Corporation Configuration d'un schéma de division de liaison montante et de liaison descendante pour une communication entre dispositifs (d2d) dans un réseau cellulaire
WO2012068731A1 (fr) * 2010-11-25 2012-05-31 Nokia Corporation Détection assistée par réseau sur une bande partagée pour des communications locales
WO2013052949A1 (fr) * 2011-10-07 2013-04-11 Qualcomm Incorporated Procédés et appareil de prise en charge de communications poste à poste

Patent Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20090016313A1 (en) * 2007-07-13 2009-01-15 Weihua Wu Method and apparatus for switching a communication channel
EP2120505A1 (fr) * 2008-05-07 2009-11-18 Fujitsu Limited Système et appareil d'attribution de ressources sans fil pour la communication entre véhicules et d'un véhicule avec la route
WO2011145857A2 (fr) * 2010-05-18 2011-11-24 한국전자통신연구원 Communication par connexion directe entre des terminaux et procédé permettant d'émettre et de recevoir directement des données entre des terminaux pour un relais de terminal
US20130064146A1 (en) * 2010-05-18 2013-03-14 Electronics And Telecommunications Research Institute Direct connection communication between terminals and method for directly transmitting and receiving data between terminals for a terminal relay
WO2012019348A1 (fr) * 2010-08-12 2012-02-16 Nokia Corporation Configuration d'un schéma de division de liaison montante et de liaison descendante pour une communication entre dispositifs (d2d) dans un réseau cellulaire
WO2012068731A1 (fr) * 2010-11-25 2012-05-31 Nokia Corporation Détection assistée par réseau sur une bande partagée pour des communications locales
WO2013052949A1 (fr) * 2011-10-07 2013-04-11 Qualcomm Incorporated Procédés et appareil de prise en charge de communications poste à poste

Non-Patent Citations (3)

* Cited by examiner, † Cited by third party
Title
"TR 22.803 v0.3.0; Feasibility Study for Proimity Services (ProSe", 3GPP, May 2012 (2012-05-01)
"TS 23.401 V11.2.0; General Packet Radio Service (GPRS) enhancements for Evolved Universal Terrestrial Radio Access Network (E- UTRAN) access", 3GPP, June 2012 (2012-06-01)
X. WU: "FlashLinQ: A synchronous distributed scheduler for peer-to-peer ad hoc networks", PROC. OF 48TH ANNUAL ALLERTON CONFERENCE ON COMMUNICATION, CONTROL, AND COMPUTING, MONTICELLO, IL, October 2010 (2010-10-01)

Cited By (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN104602323A (zh) * 2015-01-12 2015-05-06 河海大学 一种基于干扰抑制的d2d通信系统的呼叫接入控制方法
CN104602323B (zh) * 2015-01-12 2017-11-24 河海大学 一种基于干扰抑制的d2d通信系统的呼叫接入控制方法
WO2016193840A1 (fr) * 2015-06-03 2016-12-08 Telefonaktiebolaget Lm Ericsson (Publ) Transmission de messages hiérarchisés
CN107667564A (zh) * 2015-06-03 2018-02-06 瑞典爱立信有限公司 优先化消息的传输
US10117240B2 (en) 2015-06-03 2018-10-30 Telefonaktiebolaget L M Ericsson (Publ) Transmission of prioritized messages
CN107667564B (zh) * 2015-06-03 2021-10-26 瑞典爱立信有限公司 优先化消息的传输
CN106412801A (zh) * 2016-08-31 2017-02-15 西安电子科技大学 一种基于视频帧结构和d2d通信的视频多播方法
CN106412801B (zh) * 2016-08-31 2019-09-13 西安电子科技大学 一种基于视频帧结构和d2d通信的视频多播方法
WO2021201731A1 (fr) * 2020-03-31 2021-10-07 Telefonaktiebolaget Lm Ericsson (Publ) Nœud de réseau, équipement utilisateur de dispositif à dispositif, et procédés dans un réseau de radiocommunication

Similar Documents

Publication Publication Date Title
US10469154B2 (en) Method for performing management of local id identifying a remote UE in a relay UE in wireless communication system and a device therefor
EP3432655B1 (fr) Procédé de transmission et de réception des données au moyen d'un terminal de relais
JP6683717B2 (ja) Ｄ２ｄ通信システムにおいてｄ２ｄ端末に対するサイドリンクグラントを選択する方法及びその装置
EP3609259A1 (fr) Procédé et appareil d'attribution de ressource de liaison latérale à l'aide d'un ue de relais dans un système de communication sans fil
EP3338482B1 (fr) Procédé pour déclencher un rapport d'état de mémoire tampon (bsr) pour des données de liaison latérale dans un système de communication de dispositif à dispositif (d2d) et dispositif associé
US10588160B2 (en) Method for handling an ID collision for a D2D communication system and device therefor
EP3975449B1 (fr) Procédé de gestion de collision d'id pour un système de communication d2d, et dispositif associé
CN116235603A (zh) 用于小数据传输的方法和装置
US10028294B2 (en) Method for notifying for D2D communication system and device therefor
US10966259B2 (en) Method for performing management of different IDS in a relay UE in wireless communication system and a device therefor
CN115606109A (zh) 网络辅助侧行链路波束故障恢复
CN112970304A (zh) 用于避免针对相同设备内的nr v2x和lte v2x的传输冲突的方法
US11184936B2 (en) Method and apparatus for managing a bearer configuration of a relay user equipment
US10455443B2 (en) Method for transmitting a priority list reporting in a D2D communication system and device therefor
CN115715457A (zh) 定向侧链路（sl）波束故障检测
US20230292391A1 (en) Communication system and communication terminal
JP2024504596A (ja) ワイヤレス通信のためのグループリソース共有
US11076446B2 (en) Method and apparatus for selecting a relay user equipment
CN112689962A (zh) 用于无线通信的半双工技术
WO2014023847A1 (fr) Procédé et système pour établir une communication de dispositif à dispositif
JP2023529904A (ja) ワイヤレスサイドリンク通信用のゾーン識別（ｉｄ）
US10667286B2 (en) Method for selecting prose destinations or SL grants in a D2D communication system and device therefor
KR20200071736A (ko) 네트워크 액세스 우선 순위화
US20240349102A1 (en) Method and device for wireless communication
US20240260082A1 (en) Method and device for wireless communication

Legal Events

Date Code Title Description
121 Ep: the epo has been informed by wipo that ep was designated in this application

Ref document number: 13762074

Country of ref document: EP

Kind code of ref document: A1

NENP Non-entry into the national phase

Ref country code: DE

122 Ep: pct application non-entry in european phase

Ref document number: 13762074

Country of ref document: EP

Kind code of ref document: A1