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WO2019037864A1 - Dispositifs et procédés d'attribution de groupes de ressources radio pour communication d2d - Google Patents

Dispositifs et procédés d'attribution de groupes de ressources radio pour communication d2d Download PDF

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Publication number
WO2019037864A1
WO2019037864A1 PCT/EP2017/071410 EP2017071410W WO2019037864A1 WO 2019037864 A1 WO2019037864 A1 WO 2019037864A1 EP 2017071410 W EP2017071410 W EP 2017071410W WO 2019037864 A1 WO2019037864 A1 WO 2019037864A1
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WO
WIPO (PCT)
Prior art keywords
communication device
region
radio resource
identifier
sub
Prior art date
Legal status (The legal status 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 status listed.)
Ceased
Application number
PCT/EP2017/071410
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English (en)
Inventor
Serkan AYAZ
Daniel Medina
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Huawei Technologies Co Ltd
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Huawei Technologies Co Ltd
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Filing date
Publication date
Application filed by Huawei Technologies Co Ltd filed Critical Huawei Technologies Co Ltd
Priority to CN201780094274.3A priority Critical patent/CN111052852A/zh
Priority to PCT/EP2017/071410 priority patent/WO2019037864A1/fr
Publication of WO2019037864A1 publication Critical patent/WO2019037864A1/fr
Anticipated expiration legal-status Critical
Ceased legal-status Critical Current

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Classifications

    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W76/00—Connection management
    • H04W76/10—Connection setup
    • H04W76/14—Direct-mode setup
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W72/00—Local resource management
    • H04W72/50—Allocation or scheduling criteria for wireless resources
    • H04W72/51—Allocation or scheduling criteria for wireless resources based on terminal or device properties
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W72/00—Local resource management
    • H04W72/02—Selection of wireless resources by user or terminal

Definitions

  • the present invention relates to the field of D2D (device-to-device)
  • the present invention relates to devices and methods for radio resource pool allocation for D2D communication, in particular a D2D
  • V2X (Vehicle-to-Everything) services can be provided directly via a so-called PC5 interface (also known as sidelink or D2D communication) and/or indirectly via an LTE-Uu interface (also known as uplink/downlink), as specified in 3GPP TS 36.300 V14.2.0, "LTE; Evolved Universal Terrestrial Radio Access (E-UTRA) and Evolved Universal Terrestrial Radio Access Network (E-UTRAN); Overall description; Stage 2".
  • Support of V2X services via the PC5 interface is provided by V2X sidelink communication, which is a
  • UEs User Equipments
  • This communication mode is supported when the UE is served by E-UTRAN and when the UE is outside of E-UTRA coverage. More details about V2X sidelink communication can be found in specification 3GPP TS 23.303 V14.1 .0.
  • a UE supporting V2X sidelink communication can operate in two modes for sidelink radio resource allocation: in a first mode, known as “scheduled resource allocation", a UE requests transmission radio resources from a base station, also known as Evolved Node B (eNB), and the base station allocates dedicated transmission radio resources to the UE. In a second mode, known as “UE autonomous resource selection", the UE on its own selects radio resources from (pre-)configured resource pools.
  • a first mode known as “scheduled resource allocation”
  • a UE requests transmission radio resources from a base station, also known as Evolved Node B (eNB), and the base station allocates dedicated transmission radio resources to the UE.
  • eNB Evolved Node B
  • UE autonomous resource selection the UE on its own selects radio resources from (pre-)configured resource pools.
  • the first feature relates to zones: the world is divided into geographical zones, wherein a zone is a periodically repeating geographic region (in latitude and longitude).
  • the UE selects a radio resource pool based on the zone in which it is located.
  • the second feature relates to sensing: based on channel sensing within the selected radio resource pool, the UE selects specific sidelink radio resources within that pool for transmission.
  • y 1 [y/W ⁇ mod N y , wherein x denotes the distance between the current location of the UE and geographical coordinates (0, 0) in longitude, y denotes the distance between the current location of the UE and geographical coordinates (0, 0) in latitude, L denotes the zone length
  • zoneLength W denotes the zone width (zoneWidth)
  • N x denotes the number of zones configured with respect to longitude (zoneldLongiMod)
  • N y denotes the number of zones configured with respect to latitude ⁇ zoneldLatiMod).
  • the location of geographical coordinates (0, 0) and the parameters L, w, N x and N y can be configured by the network operator or pre-configured in the UE.
  • the UE selects a radio resource pool configured with the corresponding zonelD.
  • a resource pool is associated with a zonelD identifying a periodically repeating geographic region. This is beneficial in terms of control signaling overhead, as a single zonelD is enough to indicate multiple areas where a resource pool may be used.
  • the zonelD does not uniquely identify a specific geographic region.
  • a method to uniquely identify a specific (non-periodic) geographic region would be beneficial, since traffic demand is generally not uniformly distributed, nor does it follow any periodic pattern in space.
  • Some high-demand regions, such as a hotspot of high user density may need more or larger radio resource pools than other regions with low user density.
  • zones are uniformly sized and always rectangular. Having variable zone sizes and/or arbitrarily shaped zones would be beneficial in order to better adapt to the local road geometry and therefore to the spatial distribution of traffic demand.
  • a way of implementing variable zone sizes and/or arbitrarily shaped zones in practice would be to provide not just one zonelD but a list of zonelDs for a given resource pool. However, this might incur significant control signaling overhead.
  • zone is limited to two-dimensional (2D) regions.
  • some applications e.g., drones
  • the vertical dimension i.e., elevation
  • 3D regions i.e., three-dimensional (3D) regions.
  • embodiments of the present invention can efficiently and uniquely identify a region of variable size in n-dimensional space on the basis of its location within an n- dimensional box, with respect to an orthant-based partitioning of the box at multiple hierarchical levels.
  • the unique identity of the region comprises a sequence, and each element of the sequence identifies the orthant within which the region is located at each hierarchical level.
  • a D2D communication device can be provided with the following information, either via pre-configuration or from a network management entity, in particular a base station: the reference point (0, 0) (2D) or (0, 0, 0) (3D), and the dimensions of the box in latitude and longitude (and elevation, in 3D); and mapping of radio resource pools to specific (non-periodic) regions within the box, which may have different sizes.
  • the D2D communication device can determine the region(s) in which it is located and can select an appropriate radio resource pool for V2X sidelink communication.
  • the embodiments of the invention provide a key advantage of identifying regions of variable size by simply adjusting the length of the identification sequence, i.e., by choosing the appropriate hierarchical level.
  • the invention relates to a D2D
  • the D2D communication device comprises: a communication interface configured to communicate with another D2D communication device using one or more radio resources of at least one radio resource pool of a plurality of radio resource pools; and a processing unit configured to determine an identifier on the basis of a spatial position of the D2D communication device within a predefined spatial region and to select the at least one radio resource pool on the basis of the identifier; wherein the identifier comprises a sequence of symbols, each symbol identifying the quadrant (2D) or octant (3D) within which the D2D communication device is located at each one of a plurality of hierarchical levels of subdivision of the predefined spatial region.
  • each symbol can consist of two bits.
  • each symbol can consist of three bits.
  • the processing unit is configured to determine the identifier on the basis of the spatial position of the D2D communication device and on the basis of region configuration information provided by a network management entity or preconfigured in the D2D communication device, wherein the region configuration information comprises information about respective dimensions of the predefined spatial region and/or a spatial position of a reference point of the predefined spatial region.
  • the processing unit is configured to select the at least one radio resource pool of the plurality of radio resource pools on the basis of the identifier and on the basis of the region configuration information, wherein the region configuration information comprises information about the respective radio resource pools of the plurality of radio resource pools allocated to each sub-region of a plurality of sub-regions of the predefined spatial region.
  • the spatial position is a two- dimensional spatial position and the predefined spatial region, and spatial subdivisions thereof, have the shape of a rectangle, in particular a square.
  • the spatial position is a three- dimensional spatial position and the predefined spatial region, and spatial subdivisions thereof, have the shape of a cuboid, in particular a cube.
  • the invention relates to a method of operating a D2D communication device, wherein the method comprises: determining an identifier on the basis of a spatial position of the D2D communication device within a predefined spatial region; selecting at least one radio resource pool of a plurality of radio resource pools on the basis of the identifier; and communicating with another D2D communication device using one or more radio resources of the at least one selected radio resource pool;
  • the identifier comprises a sequence of symbols, each symbol identifying the quadrant (2D) or octant (3D) within which the D2D communication device is located at each one of a plurality of hierarchical levels of subdivision of the predefined spatial region.
  • an improved method allowing the assignment of a unique identifier to a spatial region and the selection of a radio resource pool on the basis of that identifier.
  • the invention relates to a network management entity, wherein the network management entity comprises: a processing unit configured to generate region configuration information, wherein the region configuration information defines a plurality of sub-regions of a predefined spatial region and a respective allocation of one or more radio resource pools to each of the plurality of sub-regions; and a communication interface configured to provide the region configuration information to the D2D
  • each of the plurality of sub-regions is identified by an identifier, wherein the identifier comprises a sequence of symbols, each symbol identifying the quadrant (2D) or octant (3D) within which the sub-region is located at each one of a plurality of hierarchical levels of subdivision of the predefined spatial region.
  • an improved network management entity for allocating radio resources to a D2D communication device is provided.
  • the network management entity is a base station or a cloud server.
  • the invention relates to a method of allocating radio resources to a D2D communication device.
  • the method comprises: generating region configuration information, wherein the region configuration information defines a plurality of sub-regions of a predefined spatial region and a respective allocation of one or more radio resource pools to each of the plurality of sub-regions; and providing the region configuration information to the D2D communication device; wherein each of the plurality of sub-regions is identified by an identifier, wherein the identifier comprises a sequence of symbols, each symbol identifying the quadrant (2D) or octant (3D) within which the sub- region is located at each one of a plurality of hierarchical levels of subdivision of the predefined spatial region.
  • the invention relates to a computer program comprising program code for performing the method of the second or fourth aspect when executed on a computer.
  • the invention can be implemented in hardware and/or software.
  • Figure 1 shows a schematic diagram illustrating an exemplary zone configuration according to the prior art
  • Figure 2 shows a schematic diagram illustrating a D2D communication device according to an embodiment and a network management entity according to an embodiment
  • Figure 3A shows a schematic diagram illustrating hierarchical levels of subdivision of a two-dimensional predefined spatial region determined by a D2D communication device according to an embodiment
  • Figure 3B shows a schematic diagram illustrating hierarchical levels of subdivision of a three-dimensional predefined spatial region determined by a D2D communication device according to an embodiment
  • Figure 4 shows a diagram illustrating a method of operating a D2D communication device according to an embodiment
  • Figure 5 shows a diagram illustrating a method of allocating radio resources to a D2D communication device according to an embodiment.
  • corresponding device may include a unit to perform the described method step, even if such unit is not explicitly described or illustrated in the figures.
  • embodiments with different functional blocks or processing units are described, which are connected with each other or exchange signals. It will be appreciated that the present invention covers embodiments as well, which include additional functional blocks or processing units that are arranged between the functional blocks or processing units of the embodiments described below.
  • FIG. 2 shows a schematic diagram illustrating a communication network 200 comprising a D2D communication device 201 according to an embodiment and a network
  • the D2D communication device 201 is configured to communicate with another D2D communication device (not shown in figure 2) via a sidelink (or D2D) communication channel and communicate with the network management entity 231 via an uplink/downlink communication channel.
  • the D2D communication device 201 could be implemented in the form of a vehicle or a communication module of a vehicle.
  • the network could be implemented in the form of a vehicle or a communication module of a vehicle.
  • embodiments of the invention apply to D2D communication devices other than vehicles as well.
  • the network could be implemented in the form of a vehicle or a communication module of a vehicle.
  • embodiments of the invention apply to D2D communication devices other than vehicles as well.
  • the network In an exemplary embodiment, the network
  • the D2D communication device 201 comprises a communication interface 203 configured to communicate with another D2D communication device using one or more radio resources of at least one radio resource pool of a plurality of radio resource pools.
  • the D2D communication device 201 comprises a processing unit 205.
  • the processing unit 205 is configured to determine an identifier on the basis of a spatial position of the D2D communication device 201 within a predefined spatial region and to select the at least one radio resource pool on the basis of the identifier, wherein the identifier comprises a sequence of symbols and each symbol identifies the quadrant (2D) or octant (3D) within which the D2D communication device 201 is located at each one of a plurality of hierarchical levels of subdivision of the predefined spatial region.
  • the network management entity 231 comprises a processing unit 235 configured to generate region configuration information, wherein the region configuration information defines a plurality of sub-regions of a predefined spatial region and a respective allocation of one or more radio resource pools to each of the plurality of sub-regions.
  • the network management entity 231 further comprises a communication interface 233 configured to provide the region configuration information to the D2D communication device 201 via the downlink channel.
  • each of the plurality of sub-regions is identified by an identifier and the identifier comprises a sequence of symbols, wherein each symbol identifies the quadrant (2D) or octant (3D) within which the sub-region is located at each one of a plurality of hierarchical levels of subdivision of the predefined spatial region.
  • the processing unit 205 of the D2D communication device 201 can be further configured to determine the identifier on the basis of the spatial position of the D2D communication device 201 and on the basis of region configuration information provided by the network management entity 231 or preconfigured in the D2D communication device 201 , wherein the region configuration information comprises information about respective dimensions of the predefined spatial region and/or a spatial position of a reference point of the predefined spatial region.
  • the region configuration information could comprise information about the length and/or width of the predefined spatial region.
  • the processing unit 205 is further configured to select the at least one radio resource pool of the plurality of radio resource pools on the basis of the identifier and on the basis of the region configuration information, wherein the region configuration information comprises information about the respective radio resource pools of the plurality of radio resource pools allocated to each sub-region of a plurality of sub-regions of the predefined spatial region.
  • the region configuration information could comprise information about different frequency bands assigned to different radio resource pools.
  • an orthant or hyperoctant
  • an orthant in n dimensions can be considered as the intersection of n mutually orthogonal half-spaces. By independent selections of half-space signs, there are 2 n orthants in n-dimensional space.
  • a region within an n-dimensional box (also known as n-orthotope), such as a rectangle or a cuboid, can be uniquely identified based on a hierarchy of n-dimensional orthants.
  • Figures 3A and 3B show schematic diagrams illustrating two- and three-dimensional spatial regions determined by the D2D communication device 201 respectively according to embodiments of the invention, wherein a bit string can be used to identify each region within the n-dimensional box.
  • each consecutive n-bit substring corresponds to a consecutive hierarchical level and selects 1 out of 2 n orthants (e.g., 1 out of 4 quadrants in 2 dimensions, 1 out of 8 octants in 3 dimensions, etc.) at its hierarchical level. As the bit string gets longer, the region gets smaller.
  • the scattered dots in figures 3A and 3B represent the locations of D2D communication devices. As can be observed, the spatial distribution of D2D communication devices can be highly nonuniform. This serves to illustrate a scenario where the ability to allocate radio resource pools to unique (non-periodic) sub-regions of variable size might be beneficial.
  • an object such as the D2D
  • the spatial position of the D2D communication device 201 can be a two-dimensional spatial position (as in the example shown in figure 3A), and the predefined spatial region as well as spatial subdivisions thereof can have the shape of a rectangle, in particular a square.
  • the spatial position of the D2D communication device 201 can be a three- dimensional spatial position (as in the example shown in figure 3B), and the predefined spatial region as well as spatial subdivisions thereof can have the shape of a cuboid, in particular a cube.
  • Figure 4 shows a diagram illustrating a corresponding method 400 of operating the D2D communication device 201 according to an embodiment.
  • the method 400 comprises the steps of: determining 401 an identifier on the basis of a spatial position of the D2D communication device 201 within a predefined spatial region, wherein the identifier comprises a sequence of symbols, each symbol identifying the quadrant (2D) or octant (3D) within which the D2D communication device 201 is located at each one of a plurality of hierarchical levels of subdivision of the predefined spatial region; selecting 403 at least one radio resource pool of a plurality of radio resource pools on the basis of the identifier; and communicating 405 with another D2D communication device using one or more radio resources of the at least one selected radio resource pool.
  • Figure 5 shows a diagram illustrating a corresponding method 500 of allocating radio resources to the D2D communication device 201 according to an embodiment.
  • the method 500 comprises the steps of: generating 501 region configuration information, wherein the region configuration information defines a plurality of sub-regions of a predefined spatial region and/or a respective allocation of one or more radio resource pools to each of the plurality of sub-regions, wherein each of the plurality of sub-regions is identified by an identifier, wherein the identifier comprises a sequence of symbols, each symbol identifying the quadrant (2D) or octant (3D) within which the sub-region is located at each one of a plurality of hierarchical levels of subdivision of the predefined spatial region; and providing 503 the region configuration information to the D2D communication device 201 .
  • the method 500 can be performed by the network management entity 231 .

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

Abstract

L'invention concerne des dispositifs et des procédés d'attribution de groupes de ressources radio pour une communication D2D. Un dispositif de communication D2D (201) selon l'invention comprend : une interface de communication (203) configurée pour communiquer avec un autre dispositif de communication D2D à l'aide d'une ou plusieurs ressources radio d'au moins un groupe de ressources radio d'une pluralité de groupes de ressources radio ; et une unité de traitement (205) configurée pour déterminer un identifiant sur la base d'une position spatiale du dispositif de communication D2D (201) dans une région spatiale prédéfinie et pour sélectionner le ou les groupes de ressources radio sur la base de l'identifiant ; l'identifiant comprenant une séquence de symboles, chaque symbole identifiant le quadrant (2D) ou l'octant (3D) à l'intérieur duquel est situé le dispositif de communication D2D (201) au niveau de chaque niveau d'une pluralité de niveaux hiérarchiques de subdivision de la région spatiale prédéfinie.
PCT/EP2017/071410 2017-08-25 2017-08-25 Dispositifs et procédés d'attribution de groupes de ressources radio pour communication d2d Ceased WO2019037864A1 (fr)

Priority Applications (2)

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CN201780094274.3A CN111052852A (zh) 2017-08-25 2017-08-25 D2d通信中的无线资源池分配设备及方法
PCT/EP2017/071410 WO2019037864A1 (fr) 2017-08-25 2017-08-25 Dispositifs et procédés d'attribution de groupes de ressources radio pour communication d2d

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