Europaisches
`
`Patentamt
`European
`Patent Office
`Office européen
`des brevets
`
`Bescheinigung
`
`Certificate
`
`Attestation
`
`Die angehefteten
`Unterlagen stimmen mit der
`als urspringlich eingereicht
`geltenden Fassung der auf
`dem nachsten Blatt
`bezeichneten europaischen
`Patentanmeldung Uberein.
`
`The attached documents are
`exact copies of the text in
`which the European patent
`application described on the
`following page is deemed to
`have been filed.
`
`Les documentsjoints a la
`présente attestation sont
`conformesautexte,
`considéré comme
`initialement déposé, de la
`demande de brevet
`européen qui est spécifiée a
`la page suivante.
`
`
`
`Patentanmeldung Nr.
`
`Patent application No.
`
`Demande de brevet n°
`
`18197357.9 / EP18197357
`
`The organisation code and number of your priority application, to be used for filing abroad under the Paris
`Convention, is EP18197357.
`
`Der Prasident des Europaischen Patentamts;
`Im Auftrag
`For the President of the European Patent Office
`Le President de l'Office européen des brevets
`p.o.
`
`EPA/EPO/OEB Form 1014
`
`05.17
`
`V. Joseph
`
`

`

`
`
`Anmeldung Nr:
`Application no.:
`Demande no :
`
`18197357.9
`
`Anmelder/ Applicant(s) / Demandeur(s):
`
`FRAUNHOFER-GESELLSCHAPFTzur Férderung
`der angewandten Forschung e.V.
`HansastraBe 27c
`80686 Miinchen/DE
`
`Anmeldetag:
`Date offiling:
`Date de dépét :
`
`27.09.18
`
`Bezeichnung der Erfindung / Title of the invention / Titre de I'invention:
`(Falls die Bezeichnung der Erfindung nicht angegeben ist, oderfalls die Anmeldung in einer Nicht-Amtssprache des EPA eingereicht
`wurde, siehe Beschreibung beziglich urspriinglicher Bezeichnung.
`If no title is shown, orif the application has been filed in a non-EPO language, please refer to the description for the originaltitle.
`Si aucun titre n'est indiqué, ou si la demande a été déposée dans une langue autre qu'une langue officielle de l'OEB, se référer ala
`description pour le titre original.)
`
`Groupcast / Group ID Management
`
`In Anspruch genommenePrioritat(en) / Priority(Priorities) claimed / Priorité(s) revendiquée(s)
`Staat/Tag/Aktenzeichen / State/Date/File no. / Pays/Date/Numéro de dépét:
`
`Am Anmeldetag benannte Vertragstaaten / Contracting States designated at date offiling / Etats contractants désignés lors du dépét:
`
`AL AT BE BG CH CY CZ DE DK EE ES FI FR GB GR HR HU IE IS IT LI LT LU LV MC MK MT NL NO PL
`PT RO RS SE SI SK SMTR
`
`EPA/EPO/OEB Form 1014
`
`05.17
`
`2
`
`

`

`1
`
`Document Overview
`
`1.1 Document Scope
`This documentdescribes low latency variants on how to assign group IDs / group internal IDs specifically
`for the newly introduced groupcast managementin Rel-16 for V2X using NR.
`
`1.2 References
`
`Reference Label
`(use Word bookmarks
`
`
`
`
`
`Details
`
`TR 36.885
`
`1.3 Abbreviations
`
`Cee
`
`

`

`Abbreviation
`
`| Meaning
`
`
`
`
`itrallzedEnvironmental Jo
`
`PhysiealSidelink Control Channel
`
` DENM|
`
`Dedicated Short Range Communication
`
`
`
`h?
`
`

`

`o?
`
`1.4 Table of Contents
`
`Document Overview
`
`Document Scope
`References
`
`Abbreviations
`
`Table of Contents
`
`Detailed Description of the invention
`Technical Problem Statement(1)
`State of the Art, Related Patents (2)
`Assessment of the Invention
`Benefits of the Invention (4a)
`Solution / Approach(3)
`Workarounds
`Proof of Infringements
`Technical Application Area (5)
`Claims
`
`1 1
`
`4
`
`1.2
`
`1.3
`
`1.4
`
`2 2
`
`.4
`
`2.2
`
`2.3
`2.3.1
`
`2.4
`2.4.1
`2.4.2
`
`2.5
`
`

`

`2
`
`Detailed Description of the Invention
`
`2.4. Technical Problem Statement(1)
`
`including Rel-15 the LTE based V2X sidelink communication is using broadcast only. Only with Rel-16
`(using NR for the sidelink) the advanced use cases in NR such as the vehicle platooning and advanced
`driving need groupcast based sidelink communication [2]. This invention describes new solutions on “How
`to assign group (internal) IDs, especially required for low latency demanding use cases.”
`
`2.2 State of the Art, Related Patents (2)
`
`
`Current solutions are mostly solved at the application layer in the IEEE 802.a1p, which may be neither
`applicable norfulfill the latency requirements for 5G V2X use casesin Rel 16[1].
`The decision of who is the group or platoon head is usually been tackled in DSRC within the application
`layer by defining Group ID’s in the CAM messages. This is one possibility that can be adapted by the NR-
`Vax thatin the application layer a “Group ID “is defined within the CAM and DENM messages. Only the
`vehicles that can decode this Group ID become a member of the platoon. This solution however, willlead
`to a higher delay in decoding the messages and may notfit the stringent latency requirements as these are
`broadcasted every 100 ms[2]. This will also create issues when the platoon member wantsto leave the
`platoon. Then the information will reach only after 100 ms the remaining platoon members until when the
`platoon dynamics will have changed.
`
`2.3 Assessment of the Invention
`
`2.3.4 Benefits of the invention (4a)
`
`
`
`The solution proposesto use the lower layers for the group ID managementin order to fulfil the latency
`constraints.
`
`2.4 Solution / Approach (3)
`The solution is partly described for the platooning use case, which is seen as the most prominent use case
`for groupcast in V2X. However, the solution is neither limited to platooning nor to V2X, but is applicable to
`groupcast in 5G groupcast managementin general.
`
`10
`
`15
`
`20
`
`25
`
`30
`
`

`

`A platoon consists of platoon head and platoon members. The platoon members follow the platoon head
`at a (pre-) defined or fixed or adapted distance and with a (pre-) defined or fixed or adapted speed (see
`figure 1 and figure 2).
`
`35~~For the following description of the solution, few groupcast related terms need to beinitially defined:
`
`®
`
`e
`
`The group ID identifies the group.. Each group member has to know the group ID of the group(s) it
`belongs to. One example of the group ID is the platoon ID.
`Each group consists of one or (usually) multiple group members:
`
`o Group head (GH): Per group there might be one group head taking over some controlling
`
`|;
`
`- 7
`a
`
`GroupMead
`
`Ne
`* —
`
`Grou mambert
`
`40
`
`. ne
`
`Centralized groupcast
`
`-
`
`“
`
`Figure 4
`
`45
`
`o Group without group head: No dedicated group head or controlling function is assigned. This
`type of group is referred to as decentralized / distributed group,figure 2.
`
`~,
`
`* s
`
`‘,
`/
`/
`em
`
`||
`
`”
`yf
`i
`\
`Ne
`on
`
`
`
`Group members
`
`sv
`
`ne
`
`De-centralized groupcast (all members are equal) ee
`
`Figure 2
`
`50~—_The 2 ideas below provide 3 variants of how to improve and accelated the group id assignment by using
`
`lower layers.
`
`
`
`

`

`Defintions
`
`Group ID refers to either of the options below
`
`eo@8@@
`
`Group Destination ID
`Group Source ID
`Group Destination and Source ID (combination of both)
`Common Group ID (unique identification)
`
`Sidelink (SL) refers to D2D sidelink, MaM sidelink, or V2X sidelink.
`
`55
`
`60
`
`Variant 1 to 3 represent different embodiments.
`
`a1. Variant:
`
`Make changesin the sidelink control channel PSCCH and the SCI format tosatisfy the latency
`requirements.
`
`65
`
`e Adda Group ID in the SCI format 1. There are reserved 32 information bits set to zero out of which
`all or sore (e.g. 8) bits can be used to define a Group ID, which could beconfigured / set by the
`application layer.
`
`79
`
`75
`
`80
`
`85
`
`go
`
`
`
`2. Variant (enhancementof x. variant):
`
`Scramble the SCI information, or part of the SCI information with the Group ID.
`
`3. Variant:
`For the Group ID a new RNTIis introduced, e.g. called “group sidelink (GSL)’-RNTI. It is defined during
`the group setup and has to be unique for a certain area (e.g. within a certain network,cell, or zone, ifin
`coverage).
`
`-
`
`Note1:
`-
`The, e.g., group RNTI or GSL-RNTI, has to be selected for a network connected group head or
`group-head and multiple members
` Inanincoverage scenario the RNTI, e.g., group RNTI or GSL-RNTI, and further invinted RNTI,e.g.,
`group RNTI or GSL-RNTI,
`in this document has to be mapped to the networkidentifiers
`- Once the GH is out of coverage, a temporary local RNTI, e.g., group RNTI or GSL-RNTI, has to be
`considered until the next in coverage.
`- Once the UEsare in coverage again, either this local RNTI, e.g., group RNTI or GSL-RNTI, has to be
`mapped to the network new RNTIor update the group RNTI, e.g., group RNTI or GSL-RNTI, once
`the RRC is connected.
`
`3-1 Scenario: Out-of-coverage /idle mode
`
`If the UE is out-of-coverage or in idle mode (NR mode 2-like)
`o
`aGSL-RNTIis generated by the group head and distributed to other group members
`(GMs). Hence, this can be a PN sequence number.
`
`G/
`
`

`

`o The (known) application layer group ID (e.g., as used in CAM and DENM messages)is
`used as a source for the generation of the, e.g., GSL-RNTI.
`
`95
`
`3.2 Scenario: Network/ tracking area change
`
`if the network and/or the tracking area changes, the GSL-RNTI may be updated by the current
`group head. The updating may be performed by the group head,the (resent) network controller or
`by a combination of both (e.g. by the head, while the network controller assists).
`
`100
`
`Embodiment Global group (member) ID
`A unique global group ID within one network uniquely identifies each group and group member within a
`network. It is composed of
`
`105
`
`110
`
`1. Cell/ zone/etc. ID: geographical reference of the group
`2. Group ID: unique ID of the group within the geographical area
`3. Group internal ID: unique identification of each GM within the group
`Within each group (same Group ID), each group member is identified by a group internal ID
`e
`For platoons(or any other group, where the position of the GM within the group is important), the
`group internal ID can represent the the sequenceof thevehicle in the platoon.This improvesthe fast
`and easy tracking of the vehicles within the platoon, e.g. first, middle, last position of the vehicle
`within the platoon.
`o Whenever the position of the vehicle within the platoon changes, the group internal ID is
`updated accordingly.
`- According to a further embodiment, the group member ID can be composedof:
`© The group ID and the member unique ID (C-RNTI, V-RNTI, V2X RNTI).
`o
`Ifthe network RNTI is not available (especially for out of coverage cases) the group
`memberID is composed of the group ID (e.g. selected from a PN-sequence generator)plus
`a unique identifier for each GM,e.g,., .
`«
`Example: one platoon groupcast (group ID x) with 3 group members (3 vehicles
`following each other) could have the following group member IDs:
`
`415
`
`120
`
`e
`
`e
`
`GH: group ID (XYZ) + group member internal ID (01) = XYZo1
`
`1°*GM: groupcast ID; x, group member internal ID (02) = XYZo2
`
`2°4 GM: groupcast ID; x, group member internal ID (03) = XYZo3
`e
`Note: The group memberinternal [Ds could represent the vehicle order in the platoon
`
`4125
`
`3.1.4 Workarounds
`
`No workaround currently known.
`
`3.2.2 Proof of Infringements
`
`be)
`
`

`

`If included in the TS, this invention has to be used to allow V2X groupcast to work in 5G NR.
`
`3.2 Technical Application Area (5)
`
`130
`
`V2X groupcastto allow efficient low-latency assignment and modificacation of the group ID andthe GM
`group internal ID.
`
`

`

`4
`
`Claims
`
`135
`
`A mobile device being a member of a communication group and configured to communicate with
`
`one or more other members of the communication group and to exchange control information with
`
`the one or more other members, wherein the mobile device is configured to create (complile) an
`
`identification information and to transmit (distribute) the identification information on a physical
`
`layer of the control
`
`information (on the physical
`
`layer in the control channel), wherein the
`
`140
`
`identification information assigns
`
`the communication group (enabling to identify the
`
`communication group and / or the individual member within the communication group. Note, the
`
`identification information may be adaptive to the application and scenario). (Claim 1 complies to
`
`variant 1 and covers the other variants).
`
`145
`
`The mobile device according to claim 1, wherein the mobile device is a group head of the
`
`communication group. (This claim refers to the embodimentof Fig. 1).
`
`The mobile device according to one of the previous claims, wherein the control information uses the
`
`SCI format; and / or
`
`150
`
`wherein the control information uses the SC! format and wherein the identification is inserted into
`
`one or more of reserved information bits. (This claim defines variant 1 in more detail).
`
`The mobile device according to one of the previous claims, wherein the identification information is
`
`455
`
`inserted into the control information by scrambling or multiplexing the control information with the
`
`identification information (e.g. SCI information with the group ID). (This claim refers to variant 2).
`
`The mobile device according to the one the previous claims, wherein the identification information
`is out of a group comprising a group destination ID, and a group source ID, and a group destination
`and group source ID in combination, and a common group ID; and/or
`
`160
`
`

`

`wherein the identification information is composed of a cell/zone/geographical reference of the
`
`group and/or a unique ID of the group within the geographical area. (This claim represents the
`
`possible definitions for the identification information).
`
`165
`
`The mobile device according to one of the previous claims, wherein radio /network temporary
`
`identification information is used as identification information; or
`
`wherein radio /network temporary identification information is used as identification information
`
`170
`
`and wherein the radio /network temporary identification information is dependent on a certain area
`
`or geographical reference; or
`
`wherein a side link identification information is used as identification information. (This claim is
`
`directed to variant 3).
`
`475
`
`The mobile device according to claim 6, wherein the mobile device is configured to define the radio
`
`/network temporary identification information or the side link identification information during a
`
`setup phase.
`
`180
`
`The mobile device according to claim 6 or 7, wherein the radio /network temporary identification
`
`information orside link identification information is generated by the mobile device as group head,
`
`if the communication group or at least a member of the communication group is out of coverage or
`
`in idle mode; and/or
`
`185
`
`wherein the radio /network temporary identification information or the side link identification
`
`information is generated based on an application group ID or a PN sequence number, (This claim
`
`refers to scenario 3.1).
`
`

`

`9.
`
`The mobile device according to one of claims 6 to 8, wherein the radio /network temporary
`
`190
`
`identification information or the side link communication information is updated, if the network
`
`and/or the tracking area changes. (This claim refers to scenario 3.2).
`
`10.
`
`The mobile device according to one of the previous claims, wherein the mobile device or each
`
`member is configured to generate an additional group member identification (e.g. according to the
`
`3195
`
`order of the platoon).
`
`a1.
`
`The mobile device according to claim 10, wherein the global group member identification is
`
`composed of a network reference, a cell/zone/geographical reference and/or a unique identification
`
`of the group within the geographical area and/or a unique identification of each group member
`
`200
`
`within the group.
`
`12.
`
`A method for identifying a communication group,
`
`the method being performed within a
`
`communication group within which a member communicates with one or more other members of
`
`the communication group and exchanges control information with one or more other members,
`
`205
`
`wherein the method comprises:
`
`creating an identification information and transmitting (distributing) the identification information
`ona physical layer of the control information (on the physical layer in the control channel) so as to
`
`assign the identification information to the communication group (enabling to identify the
`
`210
`
`communication group and / or the individual member within the communication group).
`
`13.
`
`A computer program for performing, when running on a computer the method according to claim
`12,
`
`245
`
`
`
`eke End of document ***
`
`4p
`
`