WO2016016491A1 - Procédé de transmission multidiffusion dans l'interface radio lte comme support de communications de groupe - Google Patents

Procédé de transmission multidiffusion dans l'interface radio lte comme support de communications de groupe Download PDF

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Publication number
WO2016016491A1
WO2016016491A1 PCT/ES2015/070474 ES2015070474W WO2016016491A1 WO 2016016491 A1 WO2016016491 A1 WO 2016016491A1 ES 2015070474 W ES2015070474 W ES 2015070474W WO 2016016491 A1 WO2016016491 A1 WO 2016016491A1
Authority
WO
WIPO (PCT)
Prior art keywords
group
user equipment
rnti
enb
communications
Prior art date
Application number
PCT/ES2015/070474
Other languages
English (en)
Spanish (es)
Inventor
Ángela HERNÁNDEZ SOLANA
Antonio VALDOVINOS BARDAJÍ
Ignacio CANO LÁZARO
Isabel Serrano Vicente
Original Assignee
Teltronic, S.A.
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 Teltronic, S.A. filed Critical Teltronic, S.A.
Publication of WO2016016491A1 publication Critical patent/WO2016016491A1/fr

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Classifications

    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W76/00—Connection management
    • H04W76/40—Connection management for selective distribution or broadcast
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W72/00—Local resource management
    • H04W72/12—Wireless traffic scheduling
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W8/00—Network data management
    • H04W8/26—Network addressing or numbering for mobility support
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W72/00—Local resource management
    • H04W72/30—Resource management for broadcast services
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W72/00—Local resource management
    • H04W72/12—Wireless traffic scheduling
    • H04W72/121—Wireless traffic scheduling for groups of terminals or users
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W76/00—Connection management
    • H04W76/10—Connection setup
    • H04W76/11—Allocation or use of connection identifiers
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W8/00—Network data management
    • H04W8/18—Processing of user or subscriber data, e.g. subscribed services, user preferences or user profiles; Transfer of user or subscriber data
    • H04W8/186—Processing of subscriber group data

Definitions

  • the following invention refers to a multicast transmission method on the LTE (Long Term Evolution) radio interface for support of group communications, with the object that said method provides the necessary mechanisms at the radio level for the implementation of simultaneous communication services with a group of users, consisting of mobile devices Relay 8, or higher, using the same radio resource in the radio interface for all of them.
  • LTE Long Term Evolution
  • This report describes a multicast transmission method in the LTE radio interface for group communications support, which is of special application in the radiocommunication industry to offer mobile communications services that require high transmission speed, such as in the case of real-time video, to groups of users without the need to assign specific and differentiated radio resources for each of them, which allows the provision of such services with maximum use of radio resources and minimizing the risks of congestion of the net.
  • LTE / LTE-Advanced technology has been accepted worldwide to carry out the deployment of fourth generation (4G) mobile communications networks on which to provide high quality multimedia services in a wide range of scenarios.
  • 4G fourth generation
  • the services aimed at user groups have a great economic and social interest in public mobile communications networks and are essential to carry out professional communications from different security and emergency bodies, as well as in transport and utilities sectors.
  • LTE Long Term Evolution
  • LTE-Advanced technology a base technology for high-speed services and high data transmission capacity.
  • the LTE specifications define a broadcast / multicast multimedia service (MBMS: Multimedia Broadcast / Multicast Service) in 3GPP TS 22.146, 3GPP TS 22.246, 3GPP TS 22.346, 3GPP TS 36.440, 3GPP TS 36.442 documents.
  • MBMS Multimedia Broadcast / Multicast Service
  • the transport of information (data and signaling) between the base station (eNB: evolved Node B in LTE terminology) and the user equipment (UE: User Equipment) associated with the MBMS service can be provided in point to point (PTP) or multipoint point (PTM).
  • PTP point to point
  • PTM multipoint point
  • Point-to-point communication similar to a conventional unicast communication between the base station (eNB) and the user equipment (UE), can allow high-quality communication, using improvements such as HARQ and link adaptation, but when the The number of users is high implies a substantial overload in the network.
  • multipoint point (PTM) solutions involve the use of common physical resources to transmit data to multiple users, reducing network overhead, particularly when the number of users involved in the service is high, so that the multipoint point transmission (PTM) can be independent for each cell (monocell transmission) or the multiple cells involved can synchronize their transmissions on the same physical resources (multicell transmission) .
  • the multipoint point transmission (PTM) monocell on common transport and physical channels has been discarded in the LTE specifications, considering only the point-to-point (PTP) unicast transmission or alternatively the multipoint point transmission (PTM) multicell.
  • LTE only defines a multicast transport channel (MCH) and its corresponding mapping in a multicast physical channel (PMCH), for multicell multicast transport support, but does not specify the procedures for multicast transport. physical level for the reception of the PMCH.
  • MCH multicast transport channel
  • PMCH multicast physical channel
  • multicast logical data and control channels MTCH and MCCH
  • aspects related to MBMS service support at the link level and higher layers are not specified, so that these specifications do not appear until Relay 9 of the standard .
  • the multicast transmission procedures defined in Relay 9 of LTE and not appearing in Relay 8 are those that will allow the transmission of a certain flow of information from the base station (eNB) to several users who are in the same cell using The same radio resources.
  • LTE mobile devices designed according to the specifications of Relay 8, cannot support the functionality of the broadcast / multicast multimedia service (MBMS).
  • MBMS broadcast / multicast multimedia service
  • eMBMS evolved MBMS service
  • any flow of information intended for several users of the same cell will be treated as independent unicast transmissions both in the core of the network and in the radio interface. Consequently, it will be transmitted as independent streams that will use different radio resources in the downlink (from the base station (eNB) to mobile devices) and will therefore consume a percentage of the available capacity in the cell proportional to the number of users of the group.
  • the shortage of bandwidth requires the optimization of the use of radio resources in all types of mobile communications networks, in the professional communications sector this shortage is even more pronounced, so The provision of group services by multiplexing unicast flows, that is, by using different radio resources for each user on the downlink, is completely unassumable.
  • a multicast transmission method in the LTE radio interface for group communication support is described herein, whereby all user equipment (UE) of a group of mobile devices located in a cell can receive streams of base station (eNB) information using the same physical resources, so that the base station (eNB) assigns to all group members a different C-RNTI dynamic scheduling identifier value, and the same scheduling identifier value SPS C-RNTI semi-persistent for all user equipment (UEs) in the group.
  • UE user equipment
  • eNB base station
  • the base station maintains information about the group to which each user equipment (UE) belongs to assign the appropriate identifiers when registering and adhering to an EPS bearer service associated with the multicast service.
  • a user equipment (UE) can simultaneously maintain dedicated and group communications so that transmissions in the uplink will always receive resources through dynamic scheduling using the C-RNTI identifier, while in the downlink dedicated communications they will be identified by the dynamic identifier C-RNTI of the user equipment (UE) and group communications, by means of the semi-persistent identifier SPS C-RNTI shared by all members of the group.
  • the base station determines the most appropriate transmission parameters (modulation, channel coding, interlacing, power) by coordinating the reports on the link quality obtained from all group members.
  • Figure 2 It shows a simplified view of an LTE downlink frame, so that this frame is divided into subframes, which, in turn, are divided into the minimum resource allocation units, which can be assigned with dynamic identifiers C-RNTI or semi-persistent identifiers SPS C-RNTI.
  • a multicast transmission method is described in the LTE radio interface for support of group communications, allowing that from a base station (eNB) LTE establish data communication to a set of users in a given cell by using the same radio resource for all of them (temporary slots, frequency subcarriers and transmission power), although mobile devices do not support the broadcast / multicast communications service (MBMS) defined in the 3GPP standards.
  • eNB base station
  • MBMS broadcast / multicast communications service
  • the method described in the present invention is based on the use of the mechanisms defined by the 3GPP-LTE standard for dynamic scheduling and semi-persistent scheduling procedures, so that by applying said method, an LTE terminal will be able to support Group communications services on the physical channels PDSCH (Physical Downlink Shared Channel) and PUSCH (Physical Uplink Shared Channel).
  • PDSCH Physical Downlink Shared Channel
  • PUSCH Physical Uplink Shared Channel
  • This method is implemented by developing new functionalities in the base station (eNB) 1 that allow:
  • C-RNTI dynamic identifiers
  • SPS-C-RNTI semi-persistent
  • the base station (eNB) 1 assigns two identifiers: the dynamic scheduling identifier (C -RNTI) 4, 4 ', 4 ", A'” ... and the semi-persistent scheduling identifier (SPS-C-RNTI) 5. If the user equipment (UE) is the first of the group to register, the values of The identifiers can be any. In the event that the group to which the user equipment (UE) belongs has already been created and there are other members registered, the semi-persistent identifier (SPS-C-RNTI) 5 assigned to the new user equipment (UE) 3, 3 ', 3 ", 3"' ...
  • SPS-C-RNTI semi-persistent identifier
  • C-RNTI dynamic identifier
  • UE user equipment
  • the uplink scheduling indications for a given user equipment (UE) 3, 3 ', 3 ", 3"' ... will be sent by the base station (eNB) 1 using the dynamic identifier (C-RNTI) 4, 4 ', 4 ", A'” ...
  • C-RNTI dynamic identifier
  • the downlink scheduling indications that refer to data flows destined for a specific user equipment (UE), although this may be part of a group at that time, will be sent by the base station (eNB) using the identifier dynamic (C-RNTI).
  • UE user equipment
  • C-RNTI identifier dynamic
  • the downlink scheduling indications that refer to the data streams destined for all group members will be sent by the station (eNB) using the semi-persistent identifier (SPS-C-RNTI).
  • SPS-C-RNTI semi-persistent identifier
  • all of them will receive notification of in which physical resources they should decode the information and all of them will be able to desalt the signal at the physical level with the same scrambling sequence used by the base station transmitter (eNB).
  • Radio data carrier whose configuration will be set individually with each user equipment (UE), via signaling message (RRC), using the signaling carriers (SRB) and the dynamic identifier C-RNTI.
  • the dedicated radio carrier configuration must be identical for all user equipment (UEs): same logical channel identifier (LCID), radio link control configuration (RLC) (TM mode: Transparent Mode or alternatively UM (Unacknowledged Mode ) and PDCP (Packet Data Convergence Protocol)
  • UE user equipment
  • LCID logical channel identifier
  • RLC radio link control configuration
  • TM mode Transparent Mode or alternatively UM (Unacknowledged Mode )
  • PDCP Packet Data Convergence Protocol
  • AS Access Stratum
  • this method describes a method that solves these inconveniences, so that it allows all user equipment (UE) of a group of mobile devices located in a cell they can receive information flows from the base station (eNB) using the same physical resources.
  • UE user equipment
  • the system described in this method is based on a base station or eNB 1 that communicates through a radio channel 2 with several user equipment 3, 3 ', 3 ", 3"' ....
  • a simplified LTE downlink frame so that this frame is divided into subframes, which, in turn, are divided into the minimum resource allocation units, which can be assigned with dynamic identifiers C -RNTI 4, 4 ', 4 ", .... Or semi-persistent identifiers SPS C-RNTI 5.
  • the C-RNTI dynamic identifiers referenced as 4, 4', 4", ... are they will use univocally for individual communications a user equipment 3, 3 ', 3 ", ... and the semi-persistent identifier SPS C-RNTI referenced as 5 for a group of user equipment together.

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

Abstract

L'invention concerne un procédé de transmission multidiffusion dans l'interface radio LTE comme support de communications de groupe, au moyen duquel il est possible que tous les dispositifs utilisteurs (UE) d'un groupe de dispositifs mobiles situé dans une cellule puissent recevoir des flux d'informations de la station de base (eNB) en utilisant les mêmes ressources physiques, de sorte que la station de base (sNB) assigne à tous les membres du groupe une valeur différente d'identificateur de programmation dynamique (C-RNTI), et la même valeur d'identificateur de programmation semipersistante (SPS C-RNTI) pour tous les dispositifs utilisateurs (UE) du groupe.
PCT/ES2015/070474 2014-07-28 2015-06-17 Procédé de transmission multidiffusion dans l'interface radio lte comme support de communications de groupe WO2016016491A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
ESP201431134 2014-07-28
ES201431134A ES2524655A1 (es) 2014-07-28 2014-07-28 Método de transmisión multicast en la interfaz radio LTE para soporte de comunicaciones de grupo

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Publication Number Publication Date
WO2016016491A1 true WO2016016491A1 (fr) 2016-02-04

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ES (1) ES2524655A1 (fr)
WO (1) WO2016016491A1 (fr)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP3217741A1 (fr) * 2016-03-11 2017-09-13 ASUSTek Computer Inc. Procédé et appareil pour la multidiffusion de données à un groupe dans un système de communication sans fil
CN107257288A (zh) * 2017-06-12 2017-10-17 深圳市乃斯网络科技有限公司 穿越火线的组队通讯方法及系统

Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2013156056A1 (fr) * 2012-04-17 2013-10-24 Nokia Siemens Networks Oy Transmission de dispositif à dispositif en télécommunications
WO2013159830A1 (fr) * 2012-04-27 2013-10-31 Telefonaktiebolaget L M Ericsson (Publ) Transmission de données au moyen d'une ressource de canal de commande sur la liaison montante partagée

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2013156056A1 (fr) * 2012-04-17 2013-10-24 Nokia Siemens Networks Oy Transmission de dispositif à dispositif en télécommunications
WO2013159830A1 (fr) * 2012-04-27 2013-10-31 Telefonaktiebolaget L M Ericsson (Publ) Transmission de données au moyen d'une ressource de canal de commande sur la liaison montante partagée

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP3217741A1 (fr) * 2016-03-11 2017-09-13 ASUSTek Computer Inc. Procédé et appareil pour la multidiffusion de données à un groupe dans un système de communication sans fil
CN107257288A (zh) * 2017-06-12 2017-10-17 深圳市乃斯网络科技有限公司 穿越火线的组队通讯方法及系统

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Publication number Publication date
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