WO2019240745A1

WO2019240745A1 - L1 id and resource resolution for smart deployment of rsu in supporting v2x communications

Info

Publication number: WO2019240745A1
Application number: PCT/US2018/036812
Authority: WO
Inventors: Vinh Van Phan; Ling Yu
Original assignee: Nokia Technologies Oy; Nokia Usa Inc.
Priority date: 2018-06-11
Filing date: 2018-06-11
Publication date: 2019-12-19

Abstract

In accordance with the example embodiments of the invention there is at least a method and apparatus to at least perform receiving, by a vehicle user device, information for V2X communications with at least one roadside unit; based on the information, deriving at least one of a sidelink resource pool for V2X communications with the at least one roadside unit; and performing the V2X cornmunications with the at least one roadside unit using the sidelink resource pool. Further, to perform detenniniiig, by a base station, information for V2X communications with at least one roadside unit; and sending the information towards the at least one road side unit and at least one vehicle user equipment, wherein the information is for use by the at least one road side unit and at least one vehicle user equipment in deriving a sidelink resource pool for at least one of V2X communications between the at least one roadside unit and another roadside unit, and V2X communications between the at least one roadside unit and the at least one veliicle user equipment. Further, to perform receiving, by aroadside unit, information for V2X conimunications with at least one of another roadside unit and at least one veliicle user equipment; based on the information, deriving dedicated transmission resources allocated for the V2X communications; and using the dedicated transmission resources for the V2X communications with at least one of another roadside unit and at least one vehicle user equipment.

Description

LI ID AND RESOURCE RESOLUTION FOR SMART DEPLOYMENT OF RSU IN

SUPPORTING V2X COMMUNICATIONS

TECHNICAL FIELD:

[0001] The teachings in accordance with the example embodiments of this invention relate generally to smart deployment of road side units (RSU) for enhancing V2X communications and, more specifically relate to novel V2X device configurations which improve V2X communications.

BACKGROUND:

[0002] This section is intended to provide a background or context to the invention that is recited in the claims. The description herein may include concepts that could be pursued, but are not necessarily ones that have been previously conceived or pursued. Therefore, unless otherwise indicated herein, what is described in this section is not prior art to the description and claims in this application and is not admitted to be prior art by inclusion in this section.

[0003] Certain abbreviations that may be found in the description and/or in the Figures are herewith defined as follows:

BS base station

D2D device-to-device

DL downlink

eNB enhanced Node B or base station

ID identification

LTE long term evolution

MeNB macro eNB (master base station)

OFDM orthogonal frequency division multiplexing

RSU road side unit PSS primary synchronization signal

RSU roadside unit

SA scheduling assignment

SSS secondary synchronization signal

SIB system information block

SL side link

Uu UMTS air interface

UL uplink

UMTS universal mobile telecommunications system

VUE vehicle user equipment

V2V vehicle to vehicle

[0004] Vehicular communication systems implementing Vehicle-to- everything (V2X) communication are networks in which vehicles and roadside units are the communicating nodes, providing each other with information, such as safety warnings and traffic information. V2X communications can be an effective means of avoiding accidents and traffic congestion. Primary motivators for implementing V2X are road safety and efficiency.

[0005] The example embodiments of the invention work to enhance V2X communications in general as well as provide sufficient support for targeted V2X use cases.

SUMMARY:

[0006] In an aspect of the invention there is a method comprising receiving, by a vehicle user device, information for V2X communications with at least one roadside unit; based on the information, deriving at least one of a sidelink resource pool for V2X communications with the at least one roadside unit; and performing the V2X communications with the at least one roadside unit using the sidelink resource pool. [0007] A further example embodiment is a method comprising the method of the previous paragraph, wherein the information is received from a base station, and wherein the information comprises at least one of a resource pool configuration and a predefined spatial reuse pattern associated with a coverage area of the base station, wherein the predefined spatial reuse pattern is given by a resource pool reuse distance coupled with a profile identity of the predefined spatial resource reuse pattern over a common resource pool for the coverage area of the base station, wherein the resource pool configuration comprises a roadside unit transmission resource pool configuration and a vehicle user equipment transmission resource pool configuration, wherein the predefined sp atial reuse resource pattern comprises a mapping between resources being used by the at least one roadside unit for communicating a scheduling assignment or an LI identification being sent by the at least one roadside unit to be used by the at least one vehicle user equipment to derive transmission or reception resource pools and the transmission or reception resource pools, wherein the V2X communications comprise device-to- device V2X communications, wherein there is detecting at least one of an Ll identification and a scheduling assignment resource from the at least one roadside unit, wherein there is using the Ll identification and the scheduling assignment resource detected from the at least one roadside unit and the predefined spatial reuse pattern from the base station, deriving, by the vehicle user device, the sidelink resource pool for the V2X communications, wherein there is using the scheduling assignment resource from the at least one roadside unit and the predefined spatial reuse pattern from the base station, deriving, by the vehicle user device, the sidelink resource pool for the V2X communications, wherein the Ll identification is configured to at least one individually deployed roadside unit of the at least one roadside unit according to the predefined spatial resource reuse pattern.

[0008] A non-transitory computer-readable medium storing program code, the program code executed by at least one processor to perform at least the method as described in the paragraphs above.

[0009] In another example aspect of the invention, there is an apparatus, such as a vehicle user equipment apparatus, comprising means for receiving, by a vehicle user device, information for V2X communications with at least one roadside unit; means, based on the information, for deriving at least one of a sidelink resource pool for V2X communications with the at least one roadside unit; and means for performing the V2X communications with the at least one roadside unit using the sidelink resource pool.

[0010] A further example embodiment is an apparatus comprising the apparatus of the previous paragraph, wherein the information is received from a base station, and wherein the information comprises at least one of a resource pool configuration and a predefined spatial reuse pattern associated with a coverage area of the base station, wherein the predefined spatial reuse pattern is given by a resource pool reuse distance coupled with a profile identity of the predefined spatial resource reuse pattern over a common resource pool for the coverage area of the base station, wherein the resource pool configuration comprises a roadside unit transmission resource pool configuration and a vehicle user equipment transmission resource pool configuration, wherein the predefined spatial reuse resource p attem comprises a mapping between resources being used by the at least one roadside unit for communicating a scheduling assignment or anLl identification being sent by the at least one roadside unit to be used by the at least one vehicle user equipment to derive transmission or reception resource pools and the transmission or reception resource pools, wherein the V2X communications comprise device-to-device V2X communications, wherein there are means for detecting at least one of an Ll identification and a scheduling assignment resource from the at least one roadside unit, wherein there are means for using the Ll identification and the scheduling assignment resource detected from the at least one roadside unit and the predefined spatial reuse pattern from the base station, deriving, by the vehicle user device, the sidelink resource pool for the V2X co munications, wherein there are means for using the scheduling assignment resource from the at least one roadside unit and the predefined spatial reuse pattern from the base station, deriving, by the vehicle user device, the sidelink resource pool for the V2X communications, wherein the Ll identification is configured to at least one individually deployed roadside unit of the at least one roadside unit according to the predefined spatial resource reuse pattern.

[0011] In another example aspect of the invention, there is an apparatus, such as a vehicle user equipment apparatus, comprising at least one memory including computer program code; and at least one processor, wherein the at least one memory including the computer program code is configured with the at least one processor to cause the apparatus to perform receiving, by a vehicle user device, information for V2X communications with at least one roadside unit; based on the information, deriving at least one of a sidelink resource pool for V2X communications with the at least one roadside unit; and performing the V2X communications with the at least one roadside unit using the sidelink resource pool.

[0012] A further example embodiment is an apparatus comprising the apparatus of the previous paragraph, wherein the information is received from a base station, and wherein the information comprises at least one of a resource pool configuration and a predefined spatial reuse pattern associated with a coverage area of the base station, wherein the predefined spatial reuse pattern is given by a resource pool reuse distance coupled with a profile identity of the predefined spatial resource reuse pattern over a common resource pool for the coverage area of the base station, wherein the resource pool configuration comprises a roadside unit transmission resource pool configuration and a vehicle user equipment transmission resource pool configuration, wherein the predefined spatial reuse resource pattern comprises a mapping between resources being used by the at least one roadside unit for communicating a scheduling assignment or an Ll identification being sent by the at least one roadside unit to be used by the at least one vehicle user equipment to derive transmission or reception resource pools and the transmission or reception resource pools, wherein the V2X communications comprise device-to- device V2X communications, wherein the at least one memory including the computer program code is configured with the at least one processor to cause the apparatus to perform detecting at least one of an Ll identification and a scheduling assignment resource from the at least one roadside unit, wherein the at least one memory including the computer program code is configured with the at least one processor to cause the apparatus to perform using the Ll identification and the scheduling assignment resource detected from the at least one roadside unit and the predefined spatial reuse pattern from the base station, deriving, by the vehicle user device, the sidelink resource pool for the V2X communications, wherein the at least one memory including the computer program code is configured with the at least one processor to cause the apparatus to perfonn using the scheduling assigmnent resource from the at least one roadside unit and the predefined spatial reuse pattern from the base station, deriving, by the vehicle user device, the sidelink resource pool for the V2X communications, wherein the Ll identification is configured to at least one individually deployed roadside unit of the at least one roadside unit according to the predefined spatial resource reuse pattern.

[0013] In another aspect ofthe invention there is amethod comprising determining, by abase station, information for V2X communications with at least one roadside unit; and sending the information towards the at least one road side unit and at least one vehicle user equipment, wherein the information is for use by the at least one road side unit and at least one vehicle user equipment in deriving a sidelink resource pool for at least one of V2X communications between the at least one roadside unit and another roadside unit, and V2X communications between the at least one roadside unit and the at least one vehicle user equipment.

[0014] A further example embodiment is a method comprising the method of the previous paragraph, wherein the information comprises at least one of a resource pool configuration and a predefined spatial reuse pattern associated with a coverage area of the base station, wherein the predefined spatial reuse pattern is given by a resource pool reuse distance coupled with a profile identity of the predefined spatial resource reuse pattern over a common resource pool for the coverage area ofthe base station, wherein the resource pool configuration comprises a roadside unit transmission resource pool configuration and a vehicle user equipment transmission resource pool configuration, wherein the predefined spatial reuse resource pattern comprises a mapping between resources being used by the at least one roadside unit for communicating a scheduling assignment or an LI identification. being sent by the at least one roadside unit to be used by the at least one vehicle user equipment to derive transmission or reception resource pools and the transmission or reception resource pools, wherein the information comprises an indication that the at least one road side unit send an Ll identification towards the at least one vehicle user equipment, wherein at least one ofthe LI identification and the scheduling assignment are for use with the resource pool configuration and the predefined spatial reuse resource pattern for deriving the sidelink resource pool for at least one of V2X communications, wherein the scheduling assignment resource and the predefined spatial reuse pattern from the base station, deriving, by the vehicle user device, the sidelink resource pool for the V2X communications. [0015] A non-transitory computer-readable medium storing program code, the program code executed by at least one processor to perform at least the method as described in the paragraphs above.

[0016] In another example aspect of the invention, there is an apparatus, such as a base station apparatus, comprising: means for determining, by a base station, information for V2X communications with at least one roadside unit; and means for sending the information towards the at least one road side unit and at least one vehicle user equipment, wherein the information is for use by the at least one road side unit and at least one vehicle user equipment in deriving a sidelink resource pool for at least one of V2X communications between the at least one roadside unit and another roadside unit, and V2X communications between the at least one roadside unit and the at least one vehicle user equipment.

[0017] A further example embodiment is a apparatus comprising the apparatus of the previous paragraph, wherein the information comprises at least one of a resource pool configuration and a predefined spatial reuse pattern associated with a coverage area of the base station, wherein the predefined spatial reuse pattern is given by a resource pool reuse distance coupled with a profile identity of the predefined spatial resource reuse pattern over a common resource pool for the coverage area of the base station, wherein the resource pool configuration comprises a roadside unit transmission resource pool configuration and a vehicle user equipment transmission resource pool configuration, wherein the predefined spatial reuse resource pattern comprises a mapping between resources being used by the at least one roadside unit for communicating a scheduling assignment or an LI identification being sent by the at least one roadside unit to be used by the at least one vehicle user equipment to derive transmission or reception resource pools and the transmission or reception resource pools, wherein the information comprises an indication that the at least one road side unit send an Ll identification towards the at least one vehicle user equipment, wherein at least one of the Ll identification and the scheduling assignment are for use with the resource pool configuration and the predefined spatial reuse resource pattern for deriving the sidelink resource pool for at least one of V2X communications, and wherein the scheduling assignment resource and the predefined spatial reuse pattern from the base statio , deriving, by the vehicle user device, the sidelink resource pool for the V2X communications.

[0018] In another example aspect of the invention, there is an apparatus, such as a base station apparatus, comprising: at least one memory including computer program code; and at least one processor, wherein the at least one memory including the computer pro gram code is configured with the at least one processor to cause the apparatus to perform determining, by a base station, information for V2X communications with at least one roadside unit; and sending the information towards the at least one road side unit and at least one vehicle user equipment, wherein the information is for use by the at least one road side unit and at least one vehicle user equipment in deriving a sidelink resource pool for at least one of V2X communications between the at least one roadside unit and another roadside unit, and V2X communications between the at least one roadside unit and the at least one vehicle user equipment.

[0019] A further example embodiment is a apparatus comprising the apparatus of the previous paragraph, wherein the information comprises at least one of a resource pool configuration and a predefined spatial reuse pattern associated with a coverage area of the base station, wherein the predefined spatial reuse pattern is given by a resource pool reuse distance coupled with a profile identity of the predefined spatial resource reuse pattern over a common resource pool for the coverage area of the base station, wherein the resource pool configuration comprises a roadside unit transmission resource pool configuration and a vehicle user equipment transmission resource pool configuration, wherein the predefined spatial reuse resource pattern comprises a mapping between resources being used by the at least one roadside unit for communicating a scheduling assignment or an LI identification being sent by the at least one roadside unit to be used by the at least one vehicle user equipment to derive transmission or reception resource pools and the transmission or reception resource pools, wherein the information comprises an indication that the at least one road side unit send an LI identification towards the at least one vehicle user equipment, wherein at least one of the Ll identification and the scheduling assignment are for use with the resource pool configuration and the predefined spatial reuse resource pattern for deriving the sidelink resource pool for at least one of V2X communications, and wherein the scheduling assigmnent resource and the predefined spatial reuse pattern from the base station, deriving, by the vehicle user device, the sidelihk resource pool for the V2X communications.

[0020] In still another aspect of the invention there is a method, comprising receiving, by a roadside unit, information for V2X communications with at least one of another roadside unit and at least one vehicle user equipment; based on the information, deriving dedicated transmission resources allocated for the V2X communications; and using the dedicated transmission resources for the V2X communications with at least one of another roadside unit and at least one vehicle user equipment.

[0021] A further example embodiment is a method comprising the method of the previous paragraph, wherein the information comprises at least one of a resource pool configuration and a corresponding predefined spatial reuse pattern associated with a coverage area of the base station, wherein the at least one of the resource pool configuration and the corresponding predefined spatial reuse pattern is given by a resource pool reuse distance coupled with a profile identity of the predefined spatial resource reuse pattern over a common resource pool for the coverage area of the base station, wherein the resource pool configuration comprises a roadside unit transmission resource pool configuration and a vehicle user equipment transmission resource pool configuration, wherein the predefined spatial reuse resource pattern comprises a mapping between resources being used by the at least one roadside unit for communicating a scheduling assignment or an LI identification being sent by the at least one roadside unit to be used by the at least one vehicle user equipment to derive transmission or reception resource pools and the transmission or reception resource pools, wherein the information enables a configuration of an Ll identification and a scheduling assignment resource at each roadside unit of the at least one the roadside unit, wherein there is, based on at least one of the Ll identification and the scheduling assignment resource configurations, deriving device-to-device resources to be used for the V2X communications; and broadcasting towards the at least one vehicle user equipment an indication of at least one of the Ll identification and the scheduling assignment resource for use with the V2X communications using the derived device-to-device resources, wherein the Ll identification configuration comprises an Ll identification configured to the each of the at least one roadside unit according to a predefined spatial resource use pattern, wherein the Ll identification and the scheduling assignment resource are for use by the at least one of another roadside unit and the at least one vehicle user equipment, to derive a sidelink resource pool for the V2X communications, wherein there is using the scheduling assignment resource from the at least one roadside unit and the predefined spatial reuse pattern from the base station, deriving, by the vehicle user device, the sidelink resource pool for the V2X communications.

[0022] A non-transitory computer-readable medium storing program code, the program code executed by at least one processor to perform at least the method as described in the paragraphs above.

[0023] In another example aspect of the invention, there is an apparatus, such as a roadside unit apparatus comprising means for receiving, by a roadside unit, information for V2X communications with at least one of another roadside unit and at least one vehicle user equipment; means, based on the information, for deriving dedicated transmission resources allocated for tile V2X communications; and means for using the dedicated transmission resources for the V2X communications with at least one of another roadside unit and at least one vehicle user equipment.

[0024] A further example embodiment is an apparatus comprising the apparatus of the previous paragraph, wherein the information comprises at least one of a resource pool configuration and a corresponding predefined spatial reuse pattern associated with a coverage area of the base station, wherein the at least one of the resource pool configuration and the corresponding predefined spatial reuse pattern is given by a resource pool reuse distance coupled with a profile identity of the predefined spatial resource reuse pattern over a common resource pool for the coverage area of the base station, wherein the resource pool configuration comprises a roadside unit transmission resource pool configuration and a vehicle user equipment transmission resource pool configuration, wherein the predefined spatial reuse resource pattern comprises a mapping between resources being used by the at least one roadside unit for communicating a scheduling assignment or an LI identification being sent by the at least one roadside unit to be used by the at least one vehicle user equipment to derive transmission or reception resource pools and the transmission or reception resource pools, wherein the information enables a configuration of an Ll identification and a scheduling assignment resource at each roadside unit of the at least one the roadside unit, wherein there is means based on at least one of the Ll identification and the scheduling assignment resource configurations, for deriving device-to- device resources to be used for the V2X communications; and means for broadcasting towards the at least one vehicle user equipment an indication of at least one of the Ll identification and the scheduling assignment resource for use with the V2X communications using the derived device-to- device resources, wherein the Ll identification configuration comprises an Ll identification configured to the each of the at least one roadside unit according to a predefined spatial resource use pattern, wherein the Ll identification and the scheduling assignment resource are for use by the at least one of another roadside unit and the at least one vehicle user equipment, to derive a sidelink resource pool for the V2X communications, wherein there is means for using the scheduling assignment resource from the at least one roadside unit and the predefined spatial reuse pattern from the base station, deriving, by the vehicle user device, the sidelink resource pool for the V2X communications.

[0025] In another example aspect of the invention, there is an apparatus, such as a roadside unit apparatus comprising: at least one memory including computer program code; and at least one processor, wherein the at least one memory including the computer program code is configured with the at least one processor to cause the apparatus to perfonn receiving, by a roadside unit, information for V2X communications with at least one of another roadside unit and at least one vehicle user equipment; based on the information, deriving dedicated transmission resources allocated for the V2X communications; and using the dedicated transmission resources for the V2X communications with at least one of another roadside unit and at least one vehicle user equipment.

[0026] A further example embodiment is an apparatus comprising the apparatus of the previous paragraph, wherein the information comprises at least one of a resource pool configuration and a corresponding predefined spatial reuse pattern associated with a coverage area of the base station, wherein the at least one of the resource pool configuration and the corresponding predefined spatial reuse pattern is given by a resource pool reuse distance coupled with a profile identity of the predefined spatial resource reuse pattern over a common resource pool for the coverage area of the base station, wherein the resource pool configuration comprises a roadside unit transmission resource pool configuration and a vehicle user equipment transmission resource pool configuration, wherein the predefined spatial reuse resource pattern comprises a mapping between resources being used by the at least one roadside unit for communicating a scheduling assignment or an Ll identification being sent by the at least one roadside unit to be used by the at least one vehicle user equipment to derive transmission or reception resource pools and the transmission or reception resource pools, wherein the information enables a configuration of an Ll identification and a scheduling assignment resource at eachroadside unit of the at least one the roadside unit, wherein there is means based on at least one of the Ll identification and the scheduling assignment resource configurations, for deriving device-to- device resources to be used for the V2X communications; and means for broadcasting towards the at least one vehicle user equipment an indication of at least one of the Ll identification and the scheduling assignment resource for use with the V2X communications using the derived device-to- device resources, wherein the Ll identification configuration comprises an Ll identification configured to the each of the at least one roadside unit according to a predefined spatial resource use pattern, wherein the Ll identification and the scheduling assignment resource are for use by the at least one of another ro dside unit and the at least one vehicle user equipment, to derive a sidelink resource pool for the V2X communications, wherein there is means for using the scheduling assignment resource from the at least one roadside unit and the predefined spatial reuse pattern from the base station, deriving, by the vehicle user device, the sidelink resource pool for the V2X communications .

BRIEF DESCRIPTION OF THE DRAWINGS:

[0027] The foregoing and other aspects of embodiments of this invention are made more evident in the following Detailed Description, when read in conjunction with the attached Drawing Figures (e.g , FIG.), wherein:

[0028] FIG. 1 A shows an example RSU deployment;

[0029] FIG. 1B shows a signalling configuration of a resource pool for SL Communication; [0030] FIG. 1C shows PSS/SSS signalling which can be used in accordance with example embodiments of the invention;

[0031] FIG. 2 shows a high-level block diagram of various devices used in carrying out various aspects of the invention;

[0032] FIG. 3 A and FIG. 3B each show operations in accordance with example embodiments of the invention;

[0033] FIG. 3C shows example of resource-reuse mapping between LI ID and a sub-pool;

[0034] FIG. 4A shows basic logical architecture options of an LTE based V2X system RSU;

[0035] FIG. 4B shows an example of an eNB type RSU architecture;

[0036] FIG. 4C shows RSU implementation options of a UE-type RSU and an eNB-type

RSU:

[0037] FIG. 4D shows some RSU enhancements in accordance with the example embodiments of the invention;

[0038] FIG. 5 shows a VUE operation in accordance with an example embodiment of the invention;

[0039] FIG· 6 shows a method in accordance with example embodiments of the invention which may be performed by an apparatus such as a vehicle side apparatus;

[0040] FIG. 7 shows a method in accordance with example embodiments of the invention which may be performed by an apparatus such as a base station apparatus; and [0041] FIG. 8 shows a method in accordance with example embodiments of the invention which may be perfonned by an apparatus such as a roadside unit apparatus.

DETAILED DESCRIPTION:

[0042] The example embodiments of this invention relate generally to smart deployment of road side units (RSU) for enhancing V2X communications and, more specifically, relate to at least novel V2X device configurations which improve V2X communications.

[0043] In example embodiments of the invention, there is at least proposed a spatial resolution scheme for Ll ID or SA configuration as well as SL resource pool allocation to individual deployed RSU for V2X communications.

[0044] Example embodiments of the invention can consider a smart deployment of road side units (RSU) for enhancing V2X communications in general as well as an efficient support of targeted V2Xuse cases. RSU maybe defined in 3GPP TR23.785 for instance as:“a stationary infrastructure entity supporting V2X applications that can exchange messages with other entities supporting V2X applications”. In 3GPP TR23.785 two types of RSUs are introduced for LTE: UE-type RSU and eNB-type RSU, corresponding to the options of using PC5 or Uu radio interfaces for exchanging V2X messages between a vehicle UE and a RSU. RSU may be deployed along the roads, e.g., mounted on road-side lamp-posts with small footprints. FIG. 1 A illustrates such a RSU deployment.

[0045] As shown in FIG. 1A there are vehicles lx and 2x which are exchanging V2X messages using RSUs 3, and 4. The vehicle lx is controlled by MeNB 11 over link Tlx and the RSU 3 is controlled by MeNB 11 over link T3x. While the vehicle 2x is controlled by MeNB 14 over link 20x and the RSU 4 is controlled by MeNB 14 over link 1 Ox. In addition, the MeNb may controlmore than one RSU shown in FIG. 1A the MeNB 11 is also controlling the RSU 5 via link T5x. Thus, RSUs, as shownin FIG. 1A, are each under control of an MeNB. V2X communications are facilitated using a device-to- device connection between the vehicles and/or with the RSUs. Also as shown in FIG. 1 A there is an indication of a V2X resource reuse distance for RSUs. As shown in FIG. 1 A this V2X resource reuse distance can relate to a V2X coverage area or travel distance where particular V2X resources of or from different RSU, MeNB and/or VUE of a V2X system can be reused. For example, a deployed RSU (not shown in FIG. 1 A) next to RSU 5 on the right-hand side of the road may reuse the resources allocated to RSU 1 including LI ID. The resource allocation of deployed RSUs for one resource reuse distance, RSU 1 to RSU 6 in FIG. 1 A, can be seen and referred to herein as a complete sample of the resource reuse pattern.

[0046] 3 GPP has been working on enhancement for V2X services. There has been identified

25 use cases for advanced V2X services, which are categorized into four use case groups: vehicles platooning, extended sensors, and advanced driving and remote driving. As identified in 3GPP TR 36.788 V0.4.0 (2018-05). These four use groups maybe defined as:

1. Vehicles Platoonning enables the vehicles to dynamically form a platoon travelling

together. All the vehicles in the platoon obtain information from the leading vehicle to manage this platoon. These information allow the vehicles to drive closer than normal in a coordinated manner, going to the same direction and travelling together;

2. Extended Sensors enables the exchange of raw or processed data gathered through local sensors or live video images among vehicles, road site units, devices of pedestrian and V2X application servers. The vehicles can increase the perception of their environemnt beyond of what their own sensors can detect and have a more broad and holistic view of the local situation. High data rate is one of the key characteristics;

3. Advanced Driving enables. semi- automated or full-automated driving. Each vehicle

and/or RSU shares its own perception data obtained from its local sensors with vehicles in proximity and that allows vehicles to synchronize and coordinate their trajectories or maneuvers. Each vehicle may share its driving intention with vehicles in proximity; and

4. Remote Driving enables a remote driver or a V2X application to operate a remote vehicle for those passengers who cannot drive by themselves or remote vehicles located in dangerous environments. For a case where variation is limited and routes are predictable, such as public transportation, driving based on cloud computing can be used. High reliability and low latency are the main requirements.

[0047] It is noted that 3 GPP Release 15, it is expected to enhance the Cellular-based V2X services (V2V, V2I/N, and V2P) to support advanced V2X services as identified in TR 22.886 in a holistic and complementary manner to Release 14 V2X, which will involve bo thUu interface and PC5 interface.

[0048] Further, it has been established that RSUs can be utilized or deployed to bring many benefits for supporting and providing V2X. For examples, RSUs may be deployed to solve:

- half-duplexing problems in direct. V2V communications which happen when 2 or more vehicles’ devices in V2 V proximity transmit simultaneously and therefore miss receiving from each other; enhancing reliability of V2X communications by providing diversity via relaying V2X messages, reducing contention with centralized control; reducing processing overhead for vehicles’ devices as individual devices may need to communicate with one or several RSUs at a time instead of undetermined number of other devices in distributed fashion; and/or

- resolving capacity and congestion control issues on the fly.

[0049] However, LTE so far has considered that RSU is not an architectural entity but an implementation option, considering that the current LTE releases are specified to support limited road safety use cases, such as CAM and DENM messaging services. [0050] Looking forward to enabling and facilitating supports of more advanced V2X use cases in future LTE, 5G releases, and beyond, exploring smart use and deployment of LTE or 5G enhanced RSU is a promising approach. This invention proposes a method to facilitate configuration and allocation of resources to a deployed RSU for V2X communications according to a preconfigured deployment and resource-reuse pattern. This is in order to enhance effectiveness and efficiency of V2X communications as well as to reduce control overhead. In particular, in accordance with example embodiments of the invention a spatial resolution scheme is at least proposed for: configuring: (i) LI ID or, that is, primary and secondary synchronization signals (PSS/SSS) for a RSU to transmit over Uu or SL PC5 interface depending on the type or operation mode of the RSU; or (ii) dedicated resource and signaling information for sending scheduling assignment (S A) or, that is, SL control information sent on a physical SL control channel, by the RSU over SL PCS in case the RSU is operating as an UE-type RSU and SL synchronization is provided by the macro cellular coverage (the RSU does not need to send Ll ID); and allocating the spatially resolved resource pool for local SL communications with the RSU.

[0051] A resource pool is a set of resources assigned to the sidelink operation. FIG. IB shows one example of a signalling configuration of a resource pool for SL Communication. As shown in FIG. IB there is shown signaling and a subframe with resources for SL communications. That the subframe is used for the sidelink is indicated in a subframe bitmap. Within such a subframe, the resources used for SL are in two bands, identified by the occupied Physical Resource Blocks (PRBs). One band is starting at PRB-Start, one is ending and PRB-End, each one having a width ofPRB-Num resource blocks. This construction allows nesting several resource pools within one subframe, and using the remaining resource blocks for other UEs for cellular traffic. In FIG. 1 B the subframes used for the resource pools are marked with an asterisk. After a configurable period, the SL control period (SC Period), the whole pattern repeats. [0052] The signalling configuration of the resource pool for SL communications as shown in

FIG. 1B uses ProSe direct discovery services. These services comprise:

• ProSe Direct Discovery which can identify that more than one UE is in proximity;

• ProSe Direct Communication between the more than one UE; and

• Network-level Discovery and Network Support for WLAN Direct Discovery and Communication.

[0053] There are two types of RPs: Reception Resource Pools (Rx RPs) and .Transmission

Resource Pools (Tx RPs). These are either signaled by the eNB for the in coverage case, or preconfigured for the out-of-coverage case. There is for every Tx RP an associated Rx RP to enable communication. In addition, within a cell there may be more Rx RPs than Tx RPs. Due to tills reception from UEs in neighboring cells or from UEs out-of-coverage can be possible.

[0054] FIG. 1C shows one exemplary solution for PSS/SSS signalling which can be used in accordance with example embodiments of the invention. An LTE frame structure is given here as one non-limiting example. As shown in FIG. 1C there is an LTE radio frame. As shown in FIG. 1 C a PSS and an SSS are mapped to Slot-0 and Slot-lO ofthe 6^th and 7^th OFDM symbols in an LTE frame 130. There are 7 OFDM symbols 140 in slot 0 which carry the PSS and the SSS. These seven symbols appear in a first 7 symbols over 0.5ms of the slot.

[0055] For Primary Synchronization Signal (PSS) Sequences:

• Three PSS sequences are used in LTE, corresponding to the three physical layer identities within each group of cells;

• The PSS is constructed from a frequency- domain ZC sequence of length 63; and ^• Transmitted on 6th symbol of slot 0 and slotlO of each radio frame on 72 subcarriers centered around DC.

[0056] For Secondary Synchronization Signal (SSS) Sequences:

• SSC1 and SSC2 are two codes are two different cyclic shifts of a single length-31 M sequence;

^• Each SSS sequence is constructed by interleaving, in the frequency-domain, two length-31 BPSK- modulated secondary synchronization codes;

^• Two codes are alternated between the first and second SSS transmissions in each radio frame;

• This enables the UE to determine the 10ms radio frame timing from a single observation of a SSS; and

• Transmitted on 5th symbol of slot 0 and slot 10 of each radio frame on 72 subcarriers centered around DC.

[0057] It is noted that LTE ReT 14 standardizes a geo-location based zone and corresponding resource pool resolution for V2X. This geo-location based zone method does not work if the geo location information is not available at the UE side which may happen in practice. Furthermore, this geo-location based zone method is not seen to adapt to actual status or condition of local user devices on the fly, but rather follows a semi-static provisioning of spatial resource resolution for SL over a macro -cell coverage area.

[0058] Before describing the example embodiments of the invention in further detail, reference is made to FIG. 2 for illustrating a simplified block diagram of various electronic devices that are suitable for use in practicing the example embodiments of this invention. FIG. 2 shows a block diagram of one possible and non-limiting exemplary system in which the example embodiments of the invention may be practiced. In FIG. 2, a user equipment (VUE) 110 is in wireless communication with a wireless network 100. A UE is a wireless, typically mobile device that can access a wireless network. The VUE 110 includes one or more processors 120, one or more memories 125, and one or more transceivers 130 interconnected through one or more buses 127. Each ofthe one or more transceivers 130 includes a receiver Rx, 132 and a transmitter Tx 133. The one or more buses 127 may be address, data, or control buses, and may include any interconnection mechanism, such as a series of lines on a motherboard or integrated circuit, fiber_. optics or other optical communication equipment, and the like. The one or more transceivers 130 are connected to one or more antennas 128. The one or more transceivers 130 have multi-connectivity configurations and communicate over the wireless network 100 or any other network. The one or more memories 125 include computer program code 123.

[0059] The VUE 110 may include a V2X Modulel40- 1 which is configured to perform the example embodiments of the invention as described herein. The V2X Module 140-1, the V2X module can comprise one of or both parts 140-1 and/or V2X processor 140-2, which maybe implemented in a number of ways. The V2X Module 140-1 may be implemented in hardware, such as being implemented as part of the one or more processors 120. The V2X Module 140-1 may be implemented also as n integrated circuit or through other hardware such as a programmable gate array. In another example, the V2X Module 140-1 may be implemented as V2X processor 140-2, which is implemented as computer program code 123 and is executed by the one or more processors 120. For instance, the one or more memories 125 and the computer program code 123 may be configured, with the one or more processors 120, to cause the VUE 110 to perform one or more of the operations as described herein. The VUE 110 communicates with BS 170 and the RSU 180 via a wireless link 111.

[0060] The MeNB is a serving macro base station BS 170. The BS 170 can be a NR/5G

Node B or gNB (e.g., for NR new radio or 5G), an LTE eNB (e.g., for LTE long term evolution) that communicates with devices such as RSU 180 and VUE 110 of FIG. 2. The BS 170 provides access to wireless devices such as the VUE 110 or UE-type RSU to the wireless network 100. The BS 170 includes one or more processors 152, one or more memories 155, one or more network interfaces (N/W I/F(s)) 161, and one or more transceivers 160 interconnected through one or more buses 157. Each of the one or more transceivers 160 includes a receiver Rx 162 and a transmitter Tx 163. The one or more transceivers 160 are connected to one or more antennas 158. The one or more memories 155 include computer program code 153. The BS 170 includes a V2X module 150-1 which is configured to perfonn example embodiments of the invention as described herein. The V2X module 150-1 can comprise one of or both parts 150-1 and/or V2X processor 150-2, which may be implemented hi a number of ways. The V2X module 150-1 maybe implemented in hardware, such as being implemented as part of the one or more processors 152. The V2X module 150-1 may be implemented also as an integrated circuit or through other hardware such as a programmable gate array. In another example, the V2X module 150-1 may be implemented as V2X processor 150-2, which is implemented as computer program code 153 and is executed by the one or more processors 152. For instance, the one or more memories 155 and the computer program code 153 are configured to cause, with the one or more processors 152, the BS 170 to perfonn one or more of the operations as described herein. The one or more network interfaces 161 and 191 and the one or more transceivers 160 that have multi-connectivity configurations and communicate over the wireless network 100 or any other network. Such communication can be between the BS 170, the RSU 180, and the VUE 110 via the links 176 and 111. In addition, two or more BS 170 may communicate with another base station, such as a gNB, eNB, MeNB, or eNB-type RSU using, e.g., links 176. The links 176 may be wired or wireless or both and may implement, e. g. , an X2 interface. Further the links 176 maybe through other network devices such as, but not limited to an NCE/MME/SGW device such as the NCE/MME/SGW 190 of FIG. 2.

[0061] The RSU 180 can be a base station type RSU or a UE-type RSU that communicates with devices such as the BS 170 and/or VUE 110 and/or the wireless network 100. It is noted that as described further below the RSU 180 can also be a further enhanced RSU such as a hybrid using the above RSU types as well, e.g., UE-type RSU plus a BS-type RSU. The RSU 180 includes one or more processors 182, one or more memories 195, one or more network interfaces (N/W I/F(s)) 191, and one or more transceivers 190 interconnected through one or more buses 187. Each of the one or more transceivers 190 includes a receiver Rx 192 and a transmitter Tx 183. The one or more transceivers 190 are connected to one or more antennas 185. The one or more transceivers 190 have multi-connectivity configurations and communicate over the wireless network 100 or any other network. The one or more memories 195 include computer program code 193. The RSU 180 also includes a V2X processor 199 which is configured to perform example embodiments of the invention as described herein. The V2X processor 199 may be implemented in hardware as V2X module 180- 1 , such as being implemented as part of the one or more processors 182. The V2X module 180-1 may be implemented also as an integrated circuit or through other hardware such as a programmable gate array. In another example, the V2X module 180- 1 may be implemented as the V2X processor 199, which is implemented as computer program code 193 and is executed by the one or more processors 182. For instance, the one or more memories 155 and the computer program code 153 are configured to cause, with the one or more processors 182, the RSU 180 to perform one or more of the operations as described herein. The one or more network interfaces 181 communicate over a network such as via the links 176. Two or more BS 170 or BS-type RSU 180 may communicate with another base stations such as a gNB, MeNB, BS type RSU, and/or eNB or any other device using, e.g., links 176. The links 176 maybe wired or wireless or both and may implement, e.g., anX2 interface. Further, as stated above the links 176 maybe through other network devices such as, but not limited to an N CE/MME/S GW device such as the N CE/MME/S GW 190 of FIG. 2.

[0062] With regards to the RSU 180, as similarly stated above, RSU can be UE-type and eNB-type (BS-type). A RSU has V2X application and provides some local gateway function. In accordance with example embodiments of the invention the RSU 180 can be an enhanced RSU enhanced such as to be a hybrid RSU which is incorporating select features of both as aUE-type RSU and a BS-type RSU. FIG.s 4B-4D as discussed below show V2X operations which maybe combined to an advantage with use of a hybrid RSU in accordance with the example embodiments of the invention.

[0063] The one or more buses 157 and 187 may be address, data, or control buses, and may include any interconnection mechanism, such as a series of lines on a motherboard or integrated circuit, fiber optics or other optical communication equipment, wireless channels, and the like. For example, the one or more transceivers 160 and/or 190 may be implemented as a remote radio head (RRH) 203 and/or 205, with the other elements of the BS 170 being physically in a different location from the RRH, and the one or more buses 157 could be implemented in part as fiber optic cable to connect the other elements of the BS 170 to a RRH.

[0064] It is noted that description herein indicates that“cells” perform functions, but it should be clear that the BS that forms the cell will perfonn the functions. The cell makes up part of a BS. That is, there can be multiple cells per BS.

[0065] The wireless network 100 may include a network control element (NCE) 190 that may include MME (Mobility Management Entity)/SGW (Serving Gateway) functionality, and which provides connectivity with a further network, such as a telephone network and/or a data communications network (e.g., the Internet). The BS 170 is coupled via a link 131 to the NCE 190. The RSU 180 is coupled via a link 200 to the NCE 190. Further, the RSU 180 is coupled via links 176 to the BS 170. The links 131, 176, and/or 200 may be implemented as, e.g., D2D link

[0066] The NCE 190 includes one or more processors 175, one or more memories 171, and one or more network interfaces (N/W I/F(s)) 197, interconnected through one or more buses coupled with the link 185. The one or more memories 171 include computer program code 173. The one or more memories 171 and the computer program code 173 are configured to, with the one or more processors 175, cause the NCE 190 to perfonn one or more operations which may be needed to support the operations in accordance with the example embodiments of the invention.

[0067] The wireless network 100 may implement network virtualization, which is the process of combining hardware and software network resources and network functionality into a single, software-based administrative entity, a virtual network. Network virtualization involves platform virtualization, often combined with resource virtualization. Network virtualization is categorized as either external, combining many networks, or parts of networks, into a virtual unit, or internal, providing network-like functionality to software containers on a single system. Note that the virtualized entities that result from the network virtualization are still implemented, at some level, using hardware such as processors 152, 182, or 175 and memories 155, 195, and 171, and also such virtualized entities create technical effects. [0068] The computer readable memories 125, 155, 171, and 195 maybe of any type suitable to the local technical environment and may be implemented using any suitable data storage technology, such as semiconductor based memory devices, flash memory, magnetic memory devices and systems, optical memory devices and systems, fixed memory and removable memory. The computer readable memories 125, 155, 171, and 195 may be means for performing storage functions. The processors 125, 155, 171, and 195 may be of any type suitable to the local technical environment, and may include one or more of general purpose computers, special purpose computers, microprocessors, digital signal processors (DSPs) and processors based on a multi-core processor architecture, as non-limiting examples. The processors 120, 152, 175, and 182 may be means for performing functions, such as controlling the VUE 110, BS 170, RSU 180, and other functions as described herein.

[0069] In accordance with the example embodiments of the invention the components of the devices as described above with regards to FIG. 2 are at least capable of providing hardware functional means for performing the operations as described herein. These operations including, but not limited to, communicating information for deriving spatially reused resources for D2D communications within the proximity of a radio service unit, such as the RSU 180 of FIG. 2. The information can be based on at least a determined spatial reuse pattern and related configuration for allocating D2D resources for the RSU 180 and the VUE 110. This information can be from the BS 170 of Fig. 2 or an MeNB as described herein, and may also include indications of either a configure LI ID and/or a configured SA for the RSU. Further, the devices are enabled to send info towards the VUE 30. This info is for use to at least derive spatially reused resources for D2D communications within a proximity of an individual RSU such as the RSU 35. In accordance with the example embodiments of the invention the VUE such as the VUE 110 as in FIG. 2 can use this info to derive spatially reused resources for D2D communications with a UE within the proximity of the RSU (the info includes e.g., overall resource pool configurations for the serving BS e.g., MeNB coverage, spatial reuse pattern within the BS coverage given by e.g. reuse distance, mapping rule/iunction between targeted LI ID or SA of a detected RSU and spatially reused D2D resources to be used for D2D within the proximity of the detected RSU, resource pool to monitor for targeted LI ID or SA from RSU, etc.). The VUE can detect an RSU and derive resources for performing D2D communications as described herein by using either Ll ID or SA as received from the RSU 180 and/or info from BS 170 as in FIG. 2. Further, in accordance with the example embodiments of the invention these resources can include (i) D2D resource' pools for Tx/Rx, and/or (ii) dedicated resources used by the RSU to transmit for D2D).

[0070] In general, the various embodiments of the VUE 110 can include, but are not limited to, cellular telephones such as smart phones, tablets, personal digital assistants (PDAs) having wireless communication capabilities, portable computers having wireless communication capabilities, image capture devices such as digital cameras having wireless communication capabilities, gaming devices having wireless communication capabilities, music storage and playback appliances having wireless communication capabilities, Internet appliances permitting wireless Internet access and browsing, tablets with wireless communication capabilities, as well as portable units or tenrdnals that incorporate combinations of such functions.

[0071] It is noted that example embodiments of the invention focus on control elements and signalling between a serving BS e.g., MeNB, an RSU and UE, such as the BS 170, RSU 180, and VUE 110 as in FIG. 2.

[0072] In accordance with an example embodiment of the invention there is proposed a spatial resolution scheme for Ll ID or S A configuration as well as SL resource pool allocation to individual deployed RSU for V2X communications as follows.

[0073] It is mentioned herein that RSU, when being under coverage of a serving/controlling

BS e.g., MeNB, may or may not need to send SL PSS/SSS synchronization signals or, that is, SL Ll ID, for facilitating SL communications with UE of vehicles - VUE. The latter means that the SL synchronization is based on downlink synchronization signals of the serving BS e.g., MeNB. Thus, depending on whether the RSU or the serving BS is acting as the synchronization source for V2X communications via the RSU using SL, the Ll ID based or the SA based dedicated resource allocation of Tx resource pool for SL transmissions with the RSU is adopted and can be derived by the RSU and UE locally within the proximity of the RSU.

[0074] FIG. 4A shows an example of an eNB type RSU architecture can be incorporated into operations of the RSU 180 as in FIG. 2. As shown in FIG 4A the RSU has basic capabilities to receive V2X messages, to analyze the received data, and to determine when to transmit certain V2X messages to the vehicles. The RSU should have priority of using certain radio resources.

[0075] FIG. 4B shows communications operations ofanUE-typeRSU and an eNB-type RSU which in accordance with the example embodiments can be incorporated into the RSU 180 as shown in FIG. 2. As shown in scenario A) of FIG. 4B the UE-type RSU is communicating directly with the UE (VUE) via a PCS interface to exchange V2X messages between a vehicle UE and a RSU, such as in an LTE environment. Also as shown in scenario A) of FIG. 4B the UE-type RSU is receiving signaling from the network RAN over a Uu interface. In scenario A) of FIG. 4B the UE-type RSU is receiving and transmitting V2V messages over the PCS interface to the UE, and transmitting V2V messages over the Uu interface to the RAN. Then as shown in scenario B) of FIG, 4B the RSU is an eNB-Type RSU (e.g., RAN as in scenario A) of FIG. 4B). The eNB-type RSU is receiving and transmitting V2V messages with the UE (VUE) via a Uu interface, such as for LTE.

[0076] FIG. 4C, from3GPP TS23.285, shows further RSU implementation options of a UE- type RSU and an eNB-type RSU. As shown in FIG. 4C the UE-type RSU which is stationary but which still incorporates UE B operations. The operations perfonned by this UE-type RSU comprise V2X application server common with another UE A (VUE) over a V5 interface, and V2X communications between the UE-type RSU and the UE A via a PC5 interface. The V5 interface refers to the logical interface on the V2X application level directly between UE and UE-type RSU over PC5. The eNB-type RSU of FIG. 4C similarly incorporates V2X application server common with a UE A (VUE) over a VI interface. The eNB-type RSU of FIG. 40 also is performing V2X communications between the UE A via an LTE-Uu interface. The VI interface refers to the logical interface on the V2X application level between UE and the V2X network server via a serving RAN over Uu interface. [0077] FIG. 4D shows some hybrid RSU enhancements in accordance with the example embodiments of the invention. As shown in FIG. 4D the Hybrid-type RSU incorporates the functionality of the UE-type RSU and the BS-type RSU as shown in FIG. 4D. In addition, the Hybrid-type RSU as in FIG. 4D also incorporates a D2D interface and a Uu interface.

[0078] The example embodiments of the invention can provide a UE-type RSU or a hybrid type RSU (e.g., UE-type RSU and BS-type RSU) which can communicate with VUE using D2D. In addition, example embodiments of the invention can also provide BS-type RSU with a capability to send its Ll ID, rather than an SA. In accordance with example embodiments of the invention the Ll ID may be for a BS-type RSU and optional for UE-type RSU (not needed for UE-type RSU if D2D synchronization is provided by a serving BS and not UE-type RSU). Further, in accordance with example embodiments a UE-type RSU can also send an SA for D2D communications.

[0079] Further, it is noted that the functionalities of a UE-type RSU may be controlled by a-

BS e.g., an MeNB, gNB, and/or eNB and connected to the internet or V2X network via cellular access connection or connectivity provided by serving MeNB and cellular access network.

[0080] Options for operations in accordance with the example embodiments of the invention can include:

• A first option, option 1 , in accordance with example embodiments of the invention, wherein the RSU. is sending Ll ID in form of PSS/SSS, i.e , DL synchronization channel of NB-type RSU or SL synchronization channel of UE-type RSU for V2X communications inside local coverage of the RSU. It is proposed that Ll ID is configured to individual deployed RSU according to a predefined spatial resource reuse pattern which is given by a resource-pool reuse distance coupled with a profile identity of the resource reuse pattern over a common resource pool per a serving carrier. The reuse distance may be given in number of collocated RSUs as a sample of the predefined reuse pattern. For example, given that all the RSUs, such as depicted in FIG. 1 A, are of the same serving carrier and forming one sample of the reuse pattern, the reuse distance for this case is set to 6. The common resource pool which is preconfigured or provided to both RSU and UE by e.g. the serving BS in SIB, SIB#2l in present 3GPP LTE for example, is therefore divided into 6 exclusive portions or sub-pools. The profile identity of the reuse pattern coupled with the reuse distance specifies how the common resource pool is divided into exclusive portions or sub-pools and how LI IDs and the sub-pools and mappings thereof are allocated to individual RSUs of the reuse pattern. For at least the example as shown in FIG. 1 A, a profile identity of the reuse pattern may indicate that the reuse pattern has RSUs with even LI IDs to be on one side of the road and those with odd LI IDs are on the other side of the road. The indexing of Ll IDs is in an ascending order and according to the traffic direction heading forwards. FIG. 3C illustrates some example options for the division and mapping of sub-pools corresponding to the individual RSUs; and

• A second option, option 2, in accordance with example embodiments of the invention, wherein the serving BS is providing the synchronization reference also for V2X communications over SL under its coverage and therefore a UE-type RSU under control of BS does not need to provide PSS/SSS for local V2X. It is proposed that the RSU gets at least dedicated resources for sending SA from the BS . BS also indicates to UEs the Rx pool of S A dedicated to RSUs to allow UEs to monitor S A from RSU and then derive the resolved Tx sub-pool based on received SA from a detected RSU locally within the proximity of the detected RSU. The mapping between resources being used by the RSU for sending SA or indicated in received SA and the Tx sub-pool to be used by UEs within the proximity of the RSU can be configured and controlled by BS to allow UEs to derive the resolved Tx and optionally Rx sub-pool(s).

[0081] FIG. 3A and 3B each show operations in accordance with example embodiments of the invention using at least options 1 and/or 2 as described herein. [0082] As shown in FIG. 3 A there is at Step 0 310: MeNB 38 may configure RSU the corresponding Ll ID or SA transmission resources that RSU should transmit on periodic fashion so that VUE can derive the SL resource pool based on detected Ll ID or SA transmission resource from RSU. In addition, as shown at Step 0 310 of FIG. 3A MeNB 38 may configure RSU with the SL TX/RX resource pool to communication with VUEs. This may be realized in either the conventional way by configuring the resource pool explicitly or in the same way as MeNB 38 configuring VUE 30 in Step 1. The latter implies that RSU can also derive its own SL Tx/Rx resource pool (including dedicated Tx resources if configured) based on the configured Ll ID or SA transmission resource. Further, in accordance with the example embodiments of the invention, before Step 0310 as in Figure 3 A there can be a determining step at the serving MeNB whether option 1 or option 2 as discussed herein may be adopted concerning an individual deployed RSU under the control of MeNB.

[0083] As shown in FIG. 3 A Step 1 320: MeNB 38 then configures VUE 30 with necessary information for deriving SL resource pool based on detected Ll ID or SA transmission resource from RSU. The necessary information (e.g. the resource reuse pattern, the reuse distance, mapping between Ll ID/S A resource and SL Tx/Rx resources etc.) is described above in [0045] with option 1 for examples. As shown in step 330 of FIG. 3A in accordance with option 1 as described herein, the RSU 35 is sending its Ll identification (ID) towards the VUE 30. As shown in step 340 of FIG. 3A in accordance with option 2 as described herein, the RSU 35 is sending a scheduling assignment (SA) towards the VUE 30. At step 350 of Figure 3 A the VUE 30 is deriving SL resource pools using at least one of the Ll ID and SA from the RSU 35. Then a step 360 of FIG. 3A there is transmitting and/or receiving SL communications using the derived SL resource pools.

[0084] Referred to the configuration of the necessary information for deriving SL resource pool, it is noted that some of this configuration is optional to RSU 35 but VUE 30. The benefit of this configuration is that VUE 30 will have RSU based SL resource pool to eliminate interference caused by in-band emission (which is addressed and resolved by the geo-location based zone concept in the current state of art as mentioned herein) and, at the same time, does not require VUE 30 to read SIB of RSU 35 in order to get RSU based SL resource pool (in which we consider the SL Tx/Rx may be interrupted due to RSU change in high mobility scenario if VUE 30 needs to read SIB after synchronization with RSU 35).

[0085] FIG. 3B shows another example of novel signaling elements in accordance with an example embodiment of the invention. As shown in FIG. 3B the MeNB 38 is transmitting information l.a) for deriving spatially reused resources for D2D communications within the proximity of the roadside unit 35. The information l.a) is based on at least a determined spatial reuse pattern and related configuration for allocating D2D resources for the RSU 35 and the VUE 30. This information from the MeNB 38 may also include indications of either a configure Ll ID and/or a configured SA for the RSU 35. Further, as shown in FIG. 3B the MeNB 38 is sending 1.b) info towards the VUE 30. This info is for use to at least derive spatially reused resources for D2D communications within a proximity of an individual RSU such as the RSU 35. In accordance with the example embodiments of the invention the VUE 30 can use this l .b) info to derive spatially reused resources for D2D communications with a UE within the proximity of the RSU (the info an include e.g., overall resource pool configurations for MeNB coverage, spatial reuse pattern within MeNB coverage given by e.g. reuse distance, mapping rule/fimction between targeted Ll ID or SA of a detected RSU and spatially reused D2D resources to be used for D2D within the proximity of the detected RSU, resource pool to monitor for targeted Ll ID or SA from RSU, etc.). The VUE 30 can detect an RSU and derive resources for performing D2D communications as described herein by using either Ll ID or SA as received from the RSU 35 and/or info from MeNB 38. Further, in accordance with the example embodiments of the invention the resources can include (i) D2D resource pools for Tx/Rx, and/or (ii) dedicated resources used by the RSU to transmit for D2D).

FIG. 3C shows examples of a reuse pattern and mapping between Ll ID and sub-pool. As shown in FIG. 3C there are options (a), (b), (c), and (d) for the division and mapping of sub-pools corresponding to the individual RSUs. FIG. 3C is in line with the RSU deployment illustrated in FIG. 1 A, assuming that the six RSUs shown in FIG. 1 A, indexed from RSU 1 to RSU 6 corresponding to Ll IDs of the RSUs, are of the same serving carrier and forming one complete sample of the reuse pattern. This is also described before in [0045]. The reuse distance for this case therefore can be set to 6 and the common resource pool which is preconfigured or provided to both RSU and UE by MeNB in SIB is divided into 6 exclusive portions or sub-pools, as shown in FIG. 3C. Each of the options (a), (b), (c) and (d) is corresponding to a predefined reuse pattern and mapping rule, and the index from 1 to 6 of the sub-pools as shown in each of the options are corresponding to RSU 1 to RSU 6, respectively.

[0086] The first option, option 1, allows for decoupling the local radio access layer or subnet of RSUs from MeNB which then can be easily shared between different operators’ macro layers. In this regard, different operator’s MeNB maybe allowed to configure different mapping between LI ID to Tx pool configuration if the resolution of the resource pool is coordinated among different operators so as to have dedicated resource pool for each operator’s. The second option, option 2, on the other hand, allows for tight control ofresources from the serving MeNB. Note that the resources for Tx and Rx at RSU is directly linked to the resources for Rx and Tx at local UE. Thus, it may be left up to the network side (O&M) to decide if option 1 or option 2 is adopted (single-operator or multi- operator operation, exclusive or shared RSU for VUE). Then the network side may configure MeNB, RSU and UE accordingly. In this regard, before Step 0 in FIG. 2 there can be a determining step at the serving MeNB whether option 1 or option 2 is adopted concerning an individual deployed RSU under the contro 1 o f MeNB .

[0087] FIG. 5 illustrates a VUE operation in accordance with an example embodiment ofthe invention. As shown in Fig. 5 there is outlined signaling and operation steps for a VUE apparatus in accordance with an example embodiment ofthe invention. As shown in step 51 of FIG. 5 the VUE receives SL resource pool configuration from

A serving MeNB, the configuration is in dependence of deployed RSU and configuration thereof on at least one of LI ID or SA. As shown in step 53 of FIG. 5 the VUE receives at least one of Ll ID or SA from a local or detected RSU. As shown in step 55 the VUE derives the SL resource pool to be used for SL communications within the proximity of the local or detected RSU based on the received SL resource pool configuration and the received at least one of Ll ID or SA ofthe local or detected RSU. Then as shown in step 57 of FIG. 5 the VUE transmits or receives SL communications within the proximity of the local or detected RSU using the derived SL resource pool. [0088] Further, in accordance with example embodiments ofthe invention which may relate to the first option, option 1 :

• MeNB indicates to RSU s and UEs under its coverage and control the predefined RSU related spatial resource reuse pattern, i.e., the reuse distance and the profile identity thereof, along with the common resource pool configuration for V2X per a serving carrier. The common resource pool configuration may consist of RSU specific Tx resource pool and UE specific Tx resource pool corresponding to the reuse pattern. That is, considering the example provided above for the RSU deployment such as depicted in FIG. 1A, each RSU is corresponding to an exclusive Tx sub-pool (1/6 ofthe commonTx pool indicated by the MeNB per a serving carrier) which is 1 : 1 mapping on the LI ID of RSU according to the indicated profile identity ofthe spatial reuse pattern. It is noted that the common resource pool configuration may also consist of a common Rx resource pool as well as resource pools for exceptional or out of coverage situations; and

• RSU, based on the configured LI ID of itself and MeNB indicated common resource pool configuration and corresponding spatial reuse pattern, derives the dedicated Tx resources allocated to it for transmission. RSU optionally may also determine to narrow down the local Rx resource pool for itself, as a proper subset of the common Rx resource pool, based on configuration or derivation of the corresponding Tx sub-pool for UE to transmit to itself as well as those for its expectable direct neighboring RSUs. Note that RSU may be configured indicate the corresponding local Tx sub-pool to UE explicitly using e.g. SIB but this may be too time consuming for UE to acquire while moving from one RSU to next RSU frequently, e.g., in every ten(s) of seconds; and

• UE, upon acquiring Ll IDs of local RSU(s) along the traveling road, may derive Tx resources of the local RSU(s) as well as the corresponding Tx sub-pool(s) for UE to select and transmit to those individual RSU(s). [0089] In accordance with example embodiments of the invention which may relate to the second option, option 2:

• MeNB indicates to UEs the dedicated Rx pool of SA from RSU and mapping configuration between resources indicated by S A from RSU and corresponding resolved Tx sub-pool for UEs to transmit to RSU (and to each other directly);

• RSU transmits SA periodically when it has no data to send. To incorporate that into the current SA design or, i.e., for a backward compatible implementation, the unused value of an information element of S A such as MCS may be used to indicate whether a SA is associated with actual data or not. In an alternative, the scheduling period of such the SA may be used as indication that the S A is not associated with actual data. In these options, MeNB may indicate to UEs the unused value of MCS or the periodicity of SA associated with no data to follow. For a non-backward compatible alternative, a new indication may be introduced into SA; and

• UE, upon acquiring SA(s) of local RSU(s) along the traveling road, may derive Tx resources of the local RSU(s) as well as the corresponding Tx sub-pool(s) for UE to select and transmit to those individual RSU(s).

[0090] FIG. 6 illustrates operations which may be perfonned by a vehicle user equipment device such as, but not limited to, a VUE 110 as in Figure 2 or a UE. As shown in step 610 there is receiving, by a vehicle user device, information for V2X communications with at least one ro dside unit. As shown in step 620 of FIG. 6 there is, based on the information, deriving at least one of a sidelink resource pool for V2X communications with the at least one roadside unit. Then as shown in step 630 of FIG. 6 there is performing the V2X communications with the at least one roadside unit using the sidelink resource pool.

[0091] In accordance with the example embodiments as described in the paragraph above, the information is received from a base station, and wherein the information comprises at least one of a resource pool configuration and a predefined spatial reuse pattern associated with a coverage area of the base station.

[0092] In accordance with the example embodiments as described in the paragraphs above, the predefined spatial reuse pattern is given by a resource pool reuse distance coupled with a profile identity of the predefined spatial resource reuse pattern over a common resource pool for the coverage area of the base station.

[0093] In accordance with the example embodiments as described in the paragraphs above, the resource pool configuration comprises a roadside unit transmission resource pool configuration and a vehicle user equipment transmission resource pool configuration.

[0094] In accordance with the example embodiments as described in the paragraphs above, the predefined spatial reuse resource pattern comprises a mapping between resources being used by the at least one roadside unit for communicating a scheduling assignment or an LI identification being sent by the at least one ro dside unit to be used by the at least one vehicle user equipment to derive transmission or reception resource pools and the transmission or reception resource pools.

[0095] In accordance with the example embodiments as described in the paragraphs above, the V2X communications comprise device-to -device V2X communications.

[0096] In accordance with the example embodiments as described in the paragraphs above, there is detecting at least one of an Ll identification and a scheduling assignment resource from the at least one roadside unit.

[0097] In accordance with the example embodiments as described in the paragraphs above, there is using the Ll identification and the scheduling assignment resource detected from the at least one roadside unit and the predefined spatial reuse pattern from the base station, deriving, by the vehicle user device, the sidelink resource pool for the V2X communications. [0098] In accordance with the example embodiments as described in the paragraphs above, there is using the scheduling assignment resource from the at least one roadside unit and the predefined spatial reuse pattern from the base station, deriving, by the vehicle user device, the sidelink resource pool for the V2X communications.

[0099] In accordance with the example embodiments as described in the paragraphs above, the Ll identification is configured to at least one individually deployed roadside unit of the at least one roadside unit according to the predefined spatial resource reuse pattern.

[00100] In accordance with an example embodiment of the invention as described above there is an apparatus comprising: means for receiving (e.g., one or more antennas 128 and one or more transceivers 130 as in FIG. 2) by a vehicle user device (VUE 110 as in FIG. 2), information for V2X communications with at least one roadside unit (e.g., RSU 180 as in FIG. 2); means, based on the information, deriving (e.g., one or more memories 125 include computer program code 123, and one or more processors 120 and/or V@X module 140-1 and/or VTX module 140-2 as in FIG. 2) at least one of a sidelink resource pool for V2X communications with the at least one roadside unit (e.g., RSU 180 as in FIG. 2); and means for performing (e.g., one or more memories 125 include computer program code 123, and one or more processors 120 and/or V@X module 140-1 and/or VTX module 140-2 as in FIG. 2) the V2X communications with the at least one roadside unit (e.g., RSU 180 as in FIG. 2) using the sidelink resource pool.

[00101] In the example aspect of the invention according to the paragraph above, wherein at least the means for receiving, deriving, and performing comprises a non- transitory computer readable medium [one or more memories 125] encoded with a computer program [computer program code 123 as in FIG. 2] executable by at least one processor [one or more processors 120 and/or V2X module 140-1 and/or VTX module 140-2 as in FIG. 2]

[00102] FIG. 7 illustrates operations which may be performed by a base station device such as, but not limited to, a BS 170 as in Figure 2. As shown in step 710 there is determining, by a base station, information for V2X communications with at least one roadside unit. At step 720 of FIG. 7 there is sending the information towards the at least one road side unit and at least one vehicle user equipment. Then at step 730 of FIG. 7 it is shown that wherein the information is for use by the at least one road side unit and at least one vehicle user equipment in deriving a sidelink resource pool for at least one ofV2X communications between the at least one roadside unit and another roadside unit, and V2X communications between the at least one roadside unit and the at least one vehicle user equipment.

[00103] In accordance with the example embodiments as described in the paragraph above, the information comprises at least one of a resource pool configuration-and a predefined spatial reuse pattern associated with a coverage area of the base station.

[00104] In accordance with the example embodiments as described in the paragraphs above, the predefined spatial reuse pattern is given by a resource pool reuse distance coupled with a profile identity of the predefined spatial resource reuse pattern over a common resource pool for the coverage area of the base station.

[00105] In accordance with the example embodiments as described in the paragraphs above the resource pool configuration comprises a roadside unit transmission resource pool configuration and a vehicle user equipment transmission resource pool configuration.

[00106] In accordance with the example embodiments as described in the paragraphs above, the predefined spatial reuse resource pattern comprises a mapping between resources being used by the at least one roadside unit for communicating a scheduling assignment or anLl identification being sent by the at least one roadside unit to be used by the at least one vehicle user equipment to derive transmission or reception resource pools and the transmission or reception resource pools.

[00107] In accordance with the example embodiments as described in the paragraphs above, the information comprises an indication that the at least one road side unit send an Ll identification towards the at least one vehicle user equipment. [00108] In accordance with the example embodiments as described in the paragraphs above, at least one of the Ll identification and the scheduling assignment are for use with the resource pool configuration and the predefined spatial reuse resource pattern for deriving the sidelink resource pool for at least one of V2X communications.

[00109] In accordance with the example embodiments as described in the paragraphs above, the scheduling assignment resource and the predefined spatial reuse pattern from the base station, deriving, by the vehicle user device, the sidelink resource pool for the V2X communications.

[00110] In accordance with an example embodiment of the invention as described above there is an apparatus comprising: means for determining (e.g., one or more memories 155 include computer program code 153 and one or more processors 152 and/or V2X module 150-1 and/or V2X module 150-2 as in FIG. 2), by a base station (e.g., BS 170 as in FIG. 2), information for V2X communications with at least one roadside unit (e.g., RSU 180 as in FIG. 2); and means for sending (e.g., one or more antenna 158 and one or more transceivers 160 as in FIG. 2) the information towards the at least one road side unit (e.g., RSU 180 as in FIG. 2) and at least one vehicle user equipment (e.g., VUE 110 as in FIG. 2), wherein the information is for use by the at least one road side unit and at least one vehicle user equipment in deriving (e.g., one or more memories 155 include computer program code 153 and one or more processors 152 and/or V2X module 150-1 and/or V2X module 150-2 as in FIG. 2) a sidelink resource pool for at least one of V2X communications between the at least one roadside unit (e.g., RSU 180 as in FIG. 2) and another roadside unit, and V2X communications between the at least one roadside unit and the at least one vehicle user equipment.

[00111] In the example aspect of the invention according to the paragraph above, wherein at least the means for determining, sending and deriving comprises a non-transitory computer readable medium [one or more memories 155 as in FIG. 2] encoded with a computer program [computer program code 153 as in FIG. 2] executable by at least one processor [one or more processors 152 and/or V2X module 150-1 and/or V2X module 150-2 as in FIG. 2] [00112] FIG. 8 illustrates operations which may be performed by a roadside unit device such as, but not limited to, a RSU 180 as in Figure 2. As shown in step 810 there is receiving, by a roadside unit, information for V2X communications with at least one of another roadside unit and at least one vehicle user equipment. As shown in step 820 of FIG. 8 there is, based on the information, deriving dedicated transmission resources allocated for the V2X communications. Then as shown in step 830 of FIG. 8 there is using the dedicated transmission resources for the V2X communications with at least one of another roadside unit and at least one vehicle user equipment.

[00113] In accordance with the example embodiments as described in the paragraph above, the information comprises at least one of a resource pool configuration and a corresponding predefined spatial reuse pattern associated with a coverage area of the base station.

[00114] In accordance with the example embodiments as described in the paragraphs above, the at least one of the resource pool configuration and the corresponding predefined spatial reuse pattern is given by a resource pool reuse distance coupled with a profile identity of the predefined spatial resource reuse pattern over a common resource pool for the coverage area of the base station.

[00115] In accordance with the example embodiments as described in the paragraphs above, the resource pool configuration comprises a roadside unit transmission resource pool configuration and a vehicle user equipment transmission resource pool configuration.

[00116] In accordance with the example embodiments as described in the paragraphs above, the predefined spatial reuse resource pattern comprises a mapping between resources being used by the at least one roadside unit for communicating a scheduling assignment or anLl identification being sent by the at least one roadside unit to be used by the at least one vehicle user equipment to derive transmission or reception resource pools and the transmission or reception resource pools.

[00117] In accordance with the example embodiments as described in the paragraphs above, the information enables a configuration of an LI identification and a scheduling assignment resource at each roadside unit of the at least one the roadside unit. [00118] In accordance with the example embodiments as described in the paragraphs above, there is, based on at least one of the Ll identification and the scheduling assignment resource configurations, deriving device-to-device resources to be used for the V2X communications; and broadcasting towards the at least one vehicle user equipment an indication of at least one of the Ll identification and the scheduling assignment resource for use with the V2X communications using the derived device-to-device resources

[00119] In accordance with the example embodiments as described in the paragraphs above, the Ll identification configuration comprises an Ll identification configured to the each of the at least one roadside unit according to a predefined spatial resource use pattern.

[00120] In accordance with the example embodiments as described in the paragraphs above, the Ll identification and the scheduling assignment resource are for use by the at least one of another roadside unit and the at least one vehicle user equipment, to derive a sidelink resource pool for the V2X communications.

[00121] In accordance with the example embodiments as described in the paragraphs above, there is using the scheduling assigmnent resource from the at least one roadside unit and the predefined spatial reuse pattern from the base station, deriving, by the vehicle user device, the sidelink resource pool for the V2X communications.

[00122] In accordance with an example embodiment of the invention as described above there is an apparatus comprising: means for receiving (e.g., RRH 205 and one or more transceivers 190 as in FIG. 2), by a roadside unit (e.g., RSU 180 as in FIG. 2), information for V2X communications with at least one of another roadside unit and at least one vehicle user equipment (e.g., VUE 110 as in FIG. 2); based on the information, deriving (e.g., one or more memories 195 include computer program code 193 and one or more processors 182 and/or V2X module 180-1 and/or V2X module 199 as in FIG. 2) dedicated transmission resources allocated for the V2X communications; and using (e.g., one or more memories 195 include computer program code 193 and one or more processors 182 and/or V2X module 180-1 and/or V2X module 199 as in FIG. 2) the dedicated transmission resources for the V2X communications with at least one of another roadside unit and at least one vehicle user equipment.

[00123] In the example aspect of the invention according to the paragraph above, wherein at least the means for receiving, deriving, and using comprises a lion-transitory computer readable medium [one or more memories 195 as in FIG. 2] encoded with a computer program [computer program code 193 as in FIG. 2] executable by at least one processor [one or more processors 182 and/or V2X module 180-1 and/or V2X module 199 as in FIG. 2].

[00124] In general, the various embodiments may be implemented in hardware or special purpose circuits, software, logic or any combination thereof. For example, some aspects may be implemented in hardware, while other aspects may be implemented in firmware or software which maybe executed by a controller, microprocessor or other computing device, although the invention is not limited thereto. While various aspects of the invention maybe illustrated and described as block diagrams, flow charts, or using some other pictorial representation, it is well understood that these blocks, apparatus, systems, techniques or methods described herein may be implemented in, as nonlimiting examples, hardware, software, firmware, special purpose circuits or logic, general purpose hardware or controller or other computing devices, or some combination thereof.

[00125] Embodiments of the inventions may be practiced in various components such as integrated circuit modules. The design of integrated circuits is by and large a highly automated process. Complex and powerful software tools are available for converting a logic level design into a semiconductor circuit design ready to be etched and formed on a semiconductor substrate.

[00126] The word "exemplary" is used herein to mean "serving as an example, instance, or illustration." Any embodiment described herein as "exemplary" is not necessarily to be construed as preferred or advantageous over other embodiments. All of the embodiments described in this Detailed Description are exemplary embodiments provided to enable persons skilled in the art to make or use the invention and not to limit the scope of the invention which is defined by the claims. [00127] The foregoing description has provided by way of exemplary and non-limiting examples a full and informative description of the best method and apparatus presently contemplated by the inventors for carrying out the invention. However, various modifications and adaptations may become apparent to those skilled in the relevant arts in view of the foregoing description, when read in conjunction with the accompanying drawings and the appended claims. However, all such and similar modifications of the teachings of this invention will still fall within the scope of this invention.

[00128] It should be noted that the tenns "connected," "coupled," or any variant thereof, mean any connection or coupling, either direct or indirect, between two or more elements, and may encompass the presence of one or more intermediate elements between two elements that are "connected" or "coupled" together. The coupling or connection between the elements can be physical, logical, or a combination thereof. As employed herein two elements may be considered to be "connected" or "coupled" together by the use of one or more wires, cables and/or printed electrical connections, as well as by the use of electromagnetic energy, such as electromagnetic energy having wavelengths in the radio frequency region, the microwave region and the optical (both visible and invisible) region, as several non-limiting and non-exhaustive examples.

[00129] Furthermore, some of the features of the preferred embodiments of this invention could be used to advantage without the corresponding use of other features. As such, the foregoing description should be considered as merely illustrative of the principles of the invention, and not in limitation thereof.

Claims

CLAIMS What is claimed is:

1. A method comprising: receiving, by a vehicle user device, information for V2X communications with at least one roadside unit;

based on the information, deriving at least one of a sidelink resource pool for V2X communications with the at least one roadside unit; and

performing the V2X communications with the at least one roadside unit using the sidelink resource pool.

2. The method of claim 1 , wherein the information is received from a base station, and wherein the information comprises at least one of a resource pool configuration and a predefined spatial reuse pattern associated with a coverage area of the base station.

3. The method of claim 2, wherein the predefined spatial reuse pattern is given by a resource pool reuse distance coupled with a profile identity of the predefined spatial resource reuse pattern over a common resource pool for the coverage area of the base station.

4. The method of claim 2, wherein the resource pool configuration comprises a roadside unit transmission resource pool configuration and a vehicle user equipment transmission resource pool configuration.

5. The method of claim 2, wherein the predefined spatial reuse resource pattern comprises a mapping between resources being used by the at least one roadside unit for communicating a scheduling assignment or an Ll identification being sent by the at least one roadside unit to be used by at least one vehicle user equipment to derive transmission or reception resource pools and the transmission or reception resource pools.

6. The method of claim 1 , wherein the V2X communications comprise device-to -device V2X communications. _ _ _

7. The method of claim 2, comprising:

detecting at least one of an Ll identification and a scheduling assignment resource fro the at least one roadside unit.

8. The method of claim 7, comprising:

using the Ll identification detected from the at least one ro dside unit and the predefined spatial reuse pattern from the base station, deriving, by the vehicle user device, the sidelink resource pool for the V2X communications.

9. The method of claim 7, comprising:

using the scheduling assignment resource from the at least one roadside unit and the predefined spatial reuse pattern from the base station, deriving, by the vehicle user device, the sidelink resource pool for the V2X communications.

10. The method as in any one of claims 8 and 9, wherein the Ll identification is configured to at least one individually deployed roadside unit of the at least one roadside unit according to the predefined spatial resource reuse pattern.

11. An apparatus, comprising: means for receiving, by a vehicle user device, information for V2X communications with at least one roadside unit;

means, based on the information, for deriving at least one of a sidelink resource pool for V2X communications with the at least one roadside unit; and means for performing the V2X communications with the at least one roadside unit using the sidelink resource pool.

12. The apparatus of claim 11, wherein the information is received from a base station, and wherein the information comprises at least one of a resource pool configuration and a predefined spatial reuse pattern associated with a coverage area of the base station.

13. The apparatus of claim. 12, wherein the predefined spatial reuse pattern is given by a resource pool reuse distance coupled with a profile identity of the predefined spatial resource reuse pattern over a common resource pool for the coverage area of the base station.

14. The apparatus of claim 12, wherein the resource pool configuration comprises a roadside unit transmission resource pool configuration and a vehicle user equipment transmission resource pool configuration.

15. The apparatus of claim 12, wherein the predefined spatial reuse resource pattern comprises a mapping between resources being used by the at least one roadside unit for communicating a scheduling assignment or an Ll identification being sent by the at least one roadside unit to be used by at least one vehicle user equipment to derive transmission or reception resource pools and the transmission or reception resource pools.

16. The apparatus of claim 11 , wherein the V2X communications comprise device-to -device V2X communications.

17. The apparatus of claim 12, comprising: means for detecting at least one of an Ll identification and a scheduling assignment resource from the at least one roadside unit.

18. The apparatus of claim 17, comprising: means for using the Ll identification and the scheduling assignment resource detected from the at least one roadside unit and the predefined spatial reuse pattern from the base station, deriving, by the vehicle user device, the sidelink resource pool for the V2X communications.

19. The apparatus of claim 17, comprising: means for using the scheduling assignment resource from the at least one roadside unit and the predefined spatial reuse pattern from the base station, deriving, by the vehicle user device, the sidelink resource pool for the V2X communications.

20. The apparatus as in any one of claims 18 or 19, wherein the Ll identification is configured to at least one individually deployed roadside unit of the at least one roadside unit according to the predefined spatial resource reuse pattern.

21. A method comprising:

determining, by a base station, infonnation for V2X communications with at least one roadside unit; and

sending the infonnation towards the at least one road side unit and at least one vehicle user equipment,

wherein the infonnation is for use by the at least one road side unit and at least one vehicle user equipment in deriving a sidelink resource pool for at least one of V2X communications between the at least one roadside unit and another roadside unit, and V2X communications between the at least one roadside unit and the at least one vehicle user equipment.

22. The method of claim 21 , wherein the information comprises at least one of a resource pool configuration and a predefined spatial reuse pattern associated with a coverage area of the base station.

23. The method of claim 22, wherein the predefined spatial reuse pattern is given by a resource pool reuse distance coupled with a profile identity of the predefined spatial resource reuse pattern over a common resource pool for the coverage area of the base station.

24. The method of claim 22, wherein the resource pool configuration comprises a roadside unit transmission resource pool configuration and a vehicle user equipment transmission resource pool configuration.

25. The method of claim 22, wherein the predefined spatial reuse resource pattern comprises a mapping between resources being used by the at least one roadside unit for communicating a scheduling assignment or an LI identification being sent by the at least one roadside unit to be used by the at least one vehicle user equipment to derive transmission or reception resource pools and the transmission or reception resource pools.

26. The method of claim 25, wherein the information comprises an indication that the at least one road side unit send an Ll identification towards the at least one vehicle user equipment.

27. The method of claim 26, wherein at least one of the Ll identification and the scheduling assignment are for use with the resource pool configuration and the predefined spatial reuse resource pattern for deriving the sidelink resource pool for at least one of V2X communications.

28. The method of claim 26, wherein the scheduling assignment resource and the predefined spatial reuse pattern from the base station, deriving, by the vehicle user device, the sidelink resource pool for the V2X communications.

29. An apparatus, comprising: means for determining, by a base station, information for V2X communications with at least one roadside unit; and

means for sending the information towards the at least one roa side unit and at least one vehicle user equipment,

wherein the information is for use by the at least one road side unit and at least one vehicle user equipment in deriving a sidelink resource pool for at least one of V2X communications between the at least one roadside unit and another roadside unit, and V2X communications between the at least one roadside unit and the at least one vehicle user equipment.

30. The apparatus of claim 29, wherein the information comprises at least one of a resource pool configuration and a predefined spatial reuse pattern associated with a coverage area of the base station.

31. The apparatus of claim 30, wherein the predefined spatial reuse pattern is given by a resource pool reuse distance coupled with a profile identity of the predefined spatial resource reuse pattern over a common resource pool for the coverage area of the base station.

32. The apparatus of claim 30, wherein the resource pool configuration comprises a roadside unit transmission resource pool configuration and a vehicle user equipment transmission resource pool configuration.

33. The apparatus of claim 30, wherein the predefined spatial reuse resource pattern comprises a mapping between resources being used by the at least one roadside unit for communicating a scheduling assignment or an Ll identification being sent by the at least one roadside unit to be used by the at least one vehicle user equipment to derive transmission or reception resource pools and the transmission or reception resource pools.

34. The apparatus of claim 33, wherein the information comprises an indication that the at least one road side unit send an Ll identification towards the at least one vehicle user equipment.

35. The apparatus of claim 34, wherein at least one of the Ll identification and the scheduling assignment are for use with the resource pool configuration and the predefined spatial reuse resource pattern for deriving the sidelihk resource pool for at least one of V2X communications.

36. The apparatus of claim 34, wherein the scheduling assignment resource and the -predefined spatial reuse pattern from the base station, deriving, by the vehicle user device, the sidelihk resource pool for the V2X communications.

37. A method, comprising:

receiving, by a roadside unit, information for V2X communications with at least one of another roadside unit and at least one vehicle user equipment;

based on the information, deriving dedicated transmission resources allocated for the V2X communications; and

using the dedicated transmission resources for the V2X communications with at least one of another roadside unit and at least one vehicle user equipment.

38. The method of claim 37, wherein the information comprises at least one of a resource pool configuration and a corresponding predefined spatial reuse pattern associated with a coverage area of the base station.

39. The method of claim 38, wherein the at least one of the resource pool configuration and the corresponding predefined spatial reuse pattern is given by a resource pool reuse distance coupled with a profile identity of the predefined spatial resource reuse pattern over a common resource pool for the coverage area of the base station .

40. The method of claim 38, wherein the resource pool configuration comprises a roadside unit transmission resource pool configuration and a vehicle user equipment transmission resource pool configuration.

41. The method of claim 38, wherein the predefined spatial reuse resource pattern comprises a mapping between resources being used by the at least one roadside unit for communicating a scheduling assignment or an Ll identification being sent by the at least one roadside unit to be _ used by the at least one vehicle user equipment to derive transmission or reception resource pools and the transmission or reception resource pools.

42. The method of claim 38, wherein the information enables a configuration of an Ll identification and a scheduling assignment resource at each roadside unit of the at least one the roadside unit.

43. The method of claim 42, comprising:

based on at least one of the Ll identification and the scheduling assignment resource configurations, deriving device-to -device resources to be used for the V2X communications; and broadcasting towards the at least one vehicle user equipment an indication of at least one of the Ll identification and the scheduling assignment resource for use with the V2X

communications using the derived device-to -device resources.

44. The method of claim 42, wherein the Ll identification configuration comprises an Ll identification configured to the each of the at least one roadside unit according to a predefined spatial resource use pattern.

45. The method of claim 43, wherein the Ll identification and the scheduling assignment resource are for use by the at least one of another roadside unit and the at least one vehicle user equipment, to derive a sidelink resource pool for the V2X communications.

46. The method of claim 43 , comprising;

47. An apparatus, comprising:

means for receiving, by a roadside unit, information for V2X communications with at least one of another roadside unit and at least one vehicle user equipment;

means, based on the information, for deriving dedicated transmission resources allocated for the V2X communications; and

means for using the dedicated transmission resources for the V2X communications with at least one of another roadside unit and at least one vehicle user equipment.

48. The apparatus of claim 47, wherein the information comprises at least one of a resource pool configuration and a corresponding predefined spatial reuse pattern associated with a coverage area of the base station.

49. The apparatus of claim 48, wherein the at least one of the resource pool configuration and the corresponding predefined spatial reuse pattern is given by a resource pool reuse distance coupled with a profile identity of the predefined spatial resource reuse pattern over a common resource pool for the coverage area of the base station .

50. The apparatus of claim 48, wherein the resource pool configuration comprises a roadside unit transmission resource pool configuration and a vehicle user equipment transmission resource pool configuration.

51. The apparatus of claim 48, wherein the predefined spatial reuse resource pattern comprises a mapping between resources being used by the at least one roadside unit for communicating a scheduling assignment or an LI identification being sent by the at least one roadside unit to be used by the at least one vehicle user equipment to derive transmission or reception resource pools and the transmission or reception resource pools.

52. The apparatus of claim 48, wherein the information enables a configuration of an Ll identification and a scheduling assignment resource at each roadside unit of the at least one the roadside unit.

53. The apparatus of claim 52, comprising:

means based on at least one of the Ll identification and the scheduling assignment resource configurations, for deriving device-to -device resources to be used for the V2X communications; and

means for broadcasting towards the at least one vehicle user equipment an indication of at least one of the Ll identification and the scheduling assignment resource for use with the V2X communications using the derived device-to-device resources.

54. The apparatus of claim 53, wherein the Ll identification configuration comprises an Ll identification configured to the each of the at least one roadside unit according to a predefined spatial resource use pattern.

55. The apparatus of claim 53, wherein the Ll identification and the scheduling assignment resource are for use by the at least one of another roadside unit and the at least one vehicle user equipment, to derive a sidelink resource pool for the V2X communications.

56. The appartus of claim 53, comprising:

means for using the scheduling assignment resource from the at least one roadside unit and the predefined spatial reuse pattern from the base station, deriving, by the vehicle user device, the sidelink resource pool for the V2X communications.