Techniques for relaying resource reservation information on a sidelink

Abstract

In summary, various aspects of the present disclosure relate to wireless communications. In some aspects, a first wireless communication device may receive resource reservation information associated with a second wireless communication device from a second wireless communication device on a sidelink. The resource reservation information may identify a sidelink resource reserved for the second wireless communication device for transmission on the sidelink. The first wireless communication device may send the resource reservation information to a third wireless communication device on a sidelink. Numerous other aspects are provided.

Description

[0001] Claiming priority under 35 U.S.C. § 119

[0002] This patent application claims priority to and the benefit of U.S. Non-Provisional Application No. 16 / 800,856, filed on February 25, 2020, which is hereby expressly incorporated herein by reference. Technical Field

[0003]

[0006] Generally speaking, aspects of the disclosure relate to wireless communications and to techniques for relaying resource reservation information on a sidelink and apparatus for such techniques. Background Art

[0004] Wireless communication systems are widely deployed to provide various telecommunication services such as telephony, video, data, messaging, and broadcasting. Typical wireless communication systems may employ multiple access technologies that can support communication with multiple users by sharing available system resources (e.g., bandwidth, transmit power, etc.). Examples of such multiple access technologies include code division multiple access (CDMA) systems, time division multiple access (TDMA) systems, frequency division multiple access (FDMA) systems, orthogonal frequency division multiple access (OFDMA) systems, single carrier frequency division multiple access (SC-FDMA) systems, time division synchronous code division multiple access (TD-SCDMA) systems, and long term evolution (LTE). LTE / LTE-Advanced is a set of enhancements to the Universal Mobile Telecommunications System (UMTS) mobile standard released by the Third Generation Partnership Project (3GPP).

[0005] A wireless communication network may include multiple base stations (BS) that can support communications for multiple user equipments (UEs). User equipments (UEs) may communicate with base stations (BSs) via downlinks and uplinks. A downlink (or forward link) refers to a communication link from a BS to a UE, while an uplink (or reverse link) refers to a communication link from a UE to a BS. As will be described in more detail herein, a BS may be referred to as a Node B, gNB, access point (AP), radio head, transmit receive point (TRP), new radio (NR) BS, 5G Node B, etc.

[0006] The above multiple access technologies have been adopted in various telecommunication standards to provide a common protocol that enables different user devices to communicate at the city, country, region, and even global level. New Radio (NR) (which may also be referred to as 5G) is an enhancement set to the LTE mobile standard released by the Third Generation Partnership Project (3GPP). NR is designed to better integrate with other open standards by improving spectrum efficiency, reducing costs, improving services, utilizing new spectrum, and using orthogonal frequency division multiplexing (OFDM) (CP-OFDM) with cyclic prefix (CP) on the downlink (DL), using CP-OFDM and / or SC-FDM (e.g., also referred to as discrete Fourier transform spread OFDM (DFT-s-OFDM)) on the uplink (UL), so as to better support mobile broadband Internet access, as well as support beamforming, multiple input multiple output (MIMO) antenna technology and carrier aggregation. However, as the demand for mobile broadband access continues to grow, there is a need for further improvements in LTE and NR technologies. Preferably, these improvements should be applicable to other multiple access technologies and telecommunication standards that adopt these technologies. Summary of the invention

[0007] In some aspects, a method of wireless communication performed by a first wireless communication device may include: receiving resource reservation information associated with a second wireless communication device from the second wireless communication device on a sidelink, wherein the resource reservation information identifies sidelink resources reserved for the second wireless communication device for transmission on the sidelink; and sending the resource reservation information to a third wireless communication device on the sidelink.

[0008] In a first aspect, sending the resource reservation information to the third wireless communication device comprises sending the resource reservation information together with other resource reservation information associated with the first wireless communication device. In a second aspect, alone or in combination with the first aspect, sending the resource reservation information to the third wireless communication device comprises sending the resource reservation information in a second part of a two-part sidelink control information communication on a physical sidelink shared channel.

[0009] In a third aspect, alone or in combination with one or more of the first and second aspects, sending the resource reservation information to the third wireless communication device comprises: sending the resource reservation information in a medium access control control element communication on a physical sidelink shared channel together with other shared data. In a fourth aspect, alone or in combination with one or more of the first to third aspects, sending the resource reservation information to the third wireless communication device comprises: sending the resource reservation information in a medium access control control element communication on a physical sidelink shared channel without other shared channel data.

[0010] In a fifth aspect, alone or in combination with one or more of the first to fourth aspects, sending the resource reservation information to the third wireless communication device comprises: sending the resource reservation information in a first part of a two-part sidelink control information communication on a physical sidelink control channel. In a sixth aspect, alone or in combination with one or more of the first to fifth aspects, the resource reservation information comprises at least one of the following: an indication of one or more frequency domain resources for transmission by the second wireless communication device on the sidelink, an indication of one or more time domain resources for transmission by the second wireless communication device on the sidelink, a source identifier associated with the second wireless communication device, a destination identifier associated with a destination wireless communication device for one or more sidelink communications to be sent by the second wireless communication device on the sidelink, a hybrid automatic repeat request identifier for the one or more sidelink communications, an area identifier associated with the second wireless communication device, an area identifier associated with the first wireless communication device, or a reference signal received power measurement generated by the first wireless communication device and used for the second wireless communication device.

[0011] In the seventh aspect, alone or in combination with one or more aspects from the first to the sixth aspects, the method includes: receiving other resource reservation information associated with the one or more fourth wireless communication devices from one or more fourth wireless communication devices on the sidelink; and sending the resource reservation information to the third wireless communication device includes: sending the resource reservation information together with the other resource reservation information to the third wireless communication device. In the eighth aspect, alone or in combination with one or more aspects from the first to the seventh aspects, sending the resource reservation information to the third wireless communication device includes: sending the resource reservation information to the third wireless communication device and one or more fourth wireless communication devices.

[0012] In the ninth aspect, either alone or in combination with one or more of the first to eighth aspects, the sidelink resource is autonomously reserved by the second wireless communication device. In the tenth aspect, either alone or in combination with one or more of the first to ninth aspects, the sidelink resource is allocated to the second wireless communication device by a base station. In the eleventh aspect, either alone or in combination with one or more of the first to tenth aspects, each of the first wireless communication device, the second wireless communication device, and the third wireless communication device is a user equipment or a roadside unit.

[0013] In some aspects, a first wireless communication device for wireless communication may include a memory and one or more processors operatively coupled to the memory. The memory and the one or more processors may be configured to: receive resource reservation information associated with a second wireless communication device on a sidelink from the second wireless communication device, wherein the resource reservation information identifies a sidelink resource reserved for the second wireless communication device for transmission on the sidelink; and send the resource reservation information to a third wireless communication device on the sidelink.

[0014] In a first aspect, when sending the resource reservation information to the third wireless communication device, the one or more processors are configured to: send the resource reservation information together with other resource reservation information associated with the first wireless communication device. In a second aspect, alone or in combination with the first aspect, when sending the resource reservation information to the third wireless communication device, the one or more processors are configured to: send the resource reservation information in a second part of a two-part sidelink control information communication on a physical sidelink shared channel.

[0015] In a third aspect, alone or in combination with one or more of the first and second aspects, when sending the resource reservation information to the third wireless communication device, the one or more processors are configured to: send the resource reservation information in a medium access control control element communication on a physical sidelink shared channel together with other shared data. In a fourth aspect, alone or in combination with one or more of the first to third aspects, when sending the resource reservation information to the third wireless communication device, the one or more processors are configured to: send the resource reservation information in a medium access control control element communication on a physical sidelink shared channel without other shared channel data.

[0016] In a fifth aspect, alone or in combination with one or more of the first to fourth aspects, when sending the resource reservation information to the third wireless communication device, the one or more processors are configured to: send the resource reservation information in the first part of a two-part sidelink control information communication on a physical sidelink control channel. In a sixth aspect, alone or in combination with one or more of the first to fifth aspects, the resource reservation information includes at least one of the following: an indication of one or more frequency domain resources for transmission by the second wireless communication device on the sidelink, an indication of one or more time domain resources for transmission by the second wireless communication device on the sidelink, a source identifier associated with the second wireless communication device, a destination identifier associated with a destination wireless communication device for one or more sidelink communications to be sent by the second wireless communication device on the sidelink, a hybrid automatic repeat request identifier for the one or more sidelink communications, an area identifier associated with the second wireless communication device, an area identifier associated with the first wireless communication device, or a reference signal received power measurement generated by the first wireless communication device and used by the second wireless communication device.

[0017] In the seventh aspect, alone or in combination with one or more aspects from the first to the sixth aspects, the one or more processors are further configured to: receive other resource reservation information associated with the one or more fourth wireless communication devices from one or more fourth wireless communication devices on the sidelink; and when sending the resource reservation information to the third wireless communication device, the one or more processors are configured to: send the resource reservation information together with the other resource reservation information to the third wireless communication device. In the eighth aspect, alone or in combination with one or more aspects from the first to the seventh aspects, when sending the resource reservation information to the third wireless communication device, the one or more processors are configured to: send the resource reservation information to the third wireless communication device and one or more fourth wireless communication devices.

[0018] In the ninth aspect, either alone or in combination with one or more of the first to eighth aspects, the sidelink resource is autonomously reserved by the second wireless communication device. In the tenth aspect, either alone or in combination with one or more of the first to ninth aspects, the sidelink resource is allocated to the second wireless communication device by a base station. In the eleventh aspect, either alone or in combination with one or more of the first to tenth aspects, each of the first wireless communication device, the second wireless communication device, and the third wireless communication device is a user equipment or a roadside unit.

[0019] In some aspects, a non-transitory computer-readable medium may store one or more instructions for wireless communication. The one or more instructions, when executed by one or more processors of a first wireless communication device, may cause the one or more processors to perform the following operations: receiving resource reservation information associated with a second wireless communication device on a sidelink from the second wireless communication device, wherein the resource reservation information identifies a sidelink resource reserved for the second wireless communication device for transmission on the sidelink; and sending the resource reservation information to a third wireless communication device on the sidelink.

[0020] In a first aspect, the one or more instructions causing the one or more processors to send the resource reservation information to the third wireless communication device cause the one or more processors to perform the following operations: send the resource reservation information together with other resource reservation information associated with the first wireless communication device. In a second aspect, alone or in combination with the first aspect, the one or more instructions causing the one or more processors to send the resource reservation information to the third wireless communication device cause the one or more processors to perform the following operations: send the resource reservation information in a second part of a two-part sidelink control information communication on a physical sidelink shared channel.

[0021] In the third aspect, either alone or in combination with one or more of the first and second aspects, the one or more instructions for causing the one or more processors to send the resource reservation information to the third wireless communication device cause the one or more processors to perform the following operations: sending the resource reservation information in a medium access control control element communication along with other shared data on a physical sidelink shared channel. In the fourth aspect, either alone or in combination with one or more of the first to third aspects, the one or more instructions for causing the one or more processors to send the resource reservation information to the third wireless communication device cause the one or more processors to perform the following operations: sending the resource reservation information in a medium access control control element communication on a physical sidelink shared channel without other shared channel data.

[0022] In a fifth aspect, alone or in combination with one or more of the first to fourth aspects, the one or more instructions that cause the one or more processors to send the resource reservation information to the third wireless communication device cause the one or more processors to perform the following operations: sending the resource reservation information in the first part of a two-part sidelink control information communication on a physical sidelink control channel. In a sixth aspect, alone or in combination with one or more of the first to fifth aspects, the resource reservation information includes at least one of the following: an indication of one or more frequency domain resources for transmission by the second wireless communication device on the sidelink, an indication of one or more time domain resources for transmission by the second wireless communication device on the sidelink, a source identifier associated with the second wireless communication device, a destination identifier associated with a destination wireless communication device for one or more sidelink communications to be sent by the second wireless communication device on the sidelink, a hybrid automatic repeat request identifier for the one or more sidelink communications, an area identifier associated with the second wireless communication device, an area identifier associated with the first wireless communication device, or a reference signal received power measurement generated by the first wireless communication device and used for the second wireless communication device.

[0023] In the seventh aspect, alone or in combination with one or more aspects from the first to the sixth aspects, the one or more instructions, when executed by the one or more processors, further cause the one or more processors to perform the following operations: receiving other resource reservation information associated with the one or more fourth wireless communication devices from the one or more fourth wireless communication devices on the sidelink; and the one or more instructions causing the one or more processors to send the resource reservation information to the third wireless communication device are configured to: send the resource reservation information together with the other resource reservation information to the third wireless communication device. In the eighth aspect, alone or in combination with one or more aspects from the first to the seventh aspects, the one or more instructions causing the one or more processors to send the resource reservation information to the third wireless communication device cause the one or more processors to perform the following operations: sending the resource reservation information to the third wireless communication device and one or more fourth wireless communication devices.

[0024] In the ninth aspect, either alone or in combination with one or more of the first to eighth aspects, the sidelink resource is autonomously reserved by the second wireless communication device. In the tenth aspect, either alone or in combination with one or more of the first to ninth aspects, the sidelink resource is allocated to the second wireless communication device by a base station. In the eleventh aspect, either alone or in combination with one or more of the first to tenth aspects, each of the first wireless communication device, the second wireless communication device, and the third wireless communication device is a user equipment or a roadside unit.

[0025] In some aspects, a first device for wireless communication may include: a unit for receiving resource reservation information associated with a second device on a sidelink from the second device, wherein the resource reservation information identifies sidelink resources reserved for the second device for transmission on the sidelink; and a unit for sending the resource reservation information to a third device on the sidelink.

[0026] In a first aspect, the means for sending the resource reservation information to the third wireless communication device comprises: means for sending the resource reservation information together with other resource reservation information associated with the first wireless communication device. In a second aspect, alone or in combination with the first aspect, the means for sending the resource reservation information to the third wireless communication device comprises: means for sending the resource reservation information in a second part of a two-part sidelink control information communication on a physical sidelink shared channel.

[0027] In a third aspect, either alone or in combination with one or more of the first and second aspects, the means for sending the resource reservation information to the third wireless communication device comprises: a means for sending the resource reservation information in a medium access control control element communication on a physical sidelink shared channel together with other shared data. In a fourth aspect, either alone or in combination with one or more of the first to third aspects, the means for sending the resource reservation information to the third wireless communication device comprises: a means for sending the resource reservation information in a medium access control control element communication on a physical sidelink shared channel without other shared channel data.

[0028] In a fifth aspect, alone or in combination with one or more of the first to fourth aspects, the unit for sending the resource reservation information to the third wireless communication device comprises: a unit for sending the resource reservation information in a first part of a two-part sidelink control information communication on a physical sidelink control channel. In a sixth aspect, alone or in combination with one or more of the first to fifth aspects, the resource reservation information comprises at least one of the following: an indication of one or more frequency domain resources for transmission by the second wireless communication device on the sidelink, an indication of one or more time domain resources for transmission by the second wireless communication device on the sidelink, a source identifier associated with the second wireless communication device, a destination identifier associated with a destination wireless communication device for one or more sidelink communications to be sent by the second wireless communication device on the sidelink, a hybrid automatic repeat request identifier for the one or more sidelink communications, an area identifier associated with the second wireless communication device, an area identifier associated with the first wireless communication device, or a reference signal received power measurement generated by the first wireless communication device and used by the second wireless communication device.

[0029] In the seventh aspect, alone or in combination with one or more aspects from the first to the sixth aspects, the apparatus comprises: a unit for receiving other resource reservation information associated with the one or more fourth wireless communication devices from the one or more fourth wireless communication devices on the sidelink; and the unit for sending the resource reservation information to the third wireless communication device comprises: a unit for sending the resource reservation information together with the other resource reservation information to the third wireless communication device. In the eighth aspect, alone or in combination with one or more aspects from the first to the seventh aspects, the unit for sending the resource reservation information to the third wireless communication device comprises: a unit for sending the resource reservation information to the third wireless communication device and one or more fourth wireless communication devices.

[0030] In the ninth aspect, either alone or in combination with one or more of the first to eighth aspects, the sidelink resource is autonomously reserved by the second wireless communication device. In the tenth aspect, either alone or in combination with one or more of the first to ninth aspects, the sidelink resource is allocated to the second wireless communication device by a base station. In the eleventh aspect, either alone or in combination with one or more of the first to tenth aspects, each of the first wireless communication device, the second wireless communication device, and the third wireless communication device is a user equipment or a roadside unit.

[0031] In summary, aspects include methods, apparatus, systems, computer program products, non-transitory computer-readable media, user equipment, base stations, wireless communication devices, and / or processing systems as fully described herein with reference to and as illustrated by the accompanying drawings and description.

[0032] The foregoing has been fairly broadly summarized according to the features and technical advantages of the examples of the present disclosure, so that the following detailed description can be better understood. Additional features and advantages will be described below. The disclosed concepts and specific examples can be easily used as the basis for modifying or designing other structures for the same purpose of achieving the present disclosure. Such equivalent constructions do not depart from the scope of the appended claims. When considered in conjunction with the accompanying drawings, the characteristics of the concepts disclosed herein (both their organization and method of operation) and the associated advantages will be better understood according to the description below. Each of the figures in the accompanying drawings is provided for the purpose of illustration and description, and is not intended to be a definition of the limitations of the claims. BRIEF DESCRIPTION OF THE DRAWINGS

[0033] In order to fully understand the above-mentioned features of the present disclosure, a more specific description of the invention briefly summarized above can be obtained by referring to various aspects (some of which are shown in the accompanying drawings). However, it should be noted that the accompanying drawings only illustrate certain typical aspects of the present disclosure and are therefore not considered to limit the scope of the present disclosure, as the description may allow for other equally effective aspects. The same reference numerals in different drawings may identify the same or similar elements.

[0034] Figure 1 is a diagram illustrating an example of a wireless communication network in accordance with various aspects of the present disclosure.

[0035] Figure 2A and 2B is a diagram illustrating an example of base stations, user equipment, and roadside units communicating in a wireless network according to various aspects of the present disclosure.

[0036] Figure 3A and 3B is a diagram illustrating one or more examples of relaying resource reservation information on a sidelink in accordance with various aspects of the present disclosure.

[0037] Figure 4 is a diagram illustrating an example process, for example, performed by a wireless communication device, in accordance with various aspects of the present disclosure.

[0038] Figure 5 is a conceptual data flow diagram illustrating the flow of data between different components in an example apparatus according to various aspects of the present disclosure. DETAILED DESCRIPTION

[0039] The following is a more complete description of various aspects of the present disclosure with reference to the accompanying drawings. However, the present disclosure can be embodied in many different forms and should not be construed as being limited to any specific structure or function presented throughout the present disclosure. More specifically, these aspects are provided so that the present disclosure will be thorough and complete, and the scope of the present disclosure will be fully conveyed to those skilled in the art. Based on the teachings herein, it should be understood by those skilled in the art that the scope of the present disclosure is intended to cover any aspect of the present disclosure disclosed herein, whether the aspect is implemented independently of any other aspect of the present disclosure or implemented in combination with any other aspect. For example, using any number of aspects set forth herein, a device can be implemented or a method can be implemented. In addition, the scope of the present disclosure is intended to cover such a device or method implemented using other structures, functions, or structures and functions other than the various aspects of the present disclosure set forth herein or different from the various aspects of the present disclosure set forth herein. It should be understood that any aspect of the present disclosure disclosed herein can be embodied by one or more elements of the claims.

[0040] Several aspects of telecommunication systems will now be presented with reference to various devices and techniques. These devices and techniques will be described in the following detailed description and illustrated in the accompanying drawings by various blocks, modules, components, circuits, steps, processes, algorithms, etc. (collectively referred to as "elements"). These elements may be implemented using hardware, software, or a combination thereof. Whether such elements are implemented as hardware or software depends on the specific application and the design constraints imposed on the overall system.

[0041] It should be noted that although various aspects may be described herein using terms commonly associated with 3G and / or 4G wireless technologies, various aspects of the present disclosure may be applied to communication systems based on other generations, such as 5G and later (including NR technology).

[0042] Figure 11 is a diagram showing a wireless network 100 in which various aspects of the present disclosure may be implemented. The wireless network 100 may be an LTE network or some other wireless network (e.g., a 5G or NR network). The wireless network 100 may include a plurality of BSs 110 (shown as BSs 110a, BSs 110b, BSs 110c, and BSs 110d) and other network entities. A BS is an entity that communicates with a user equipment (UE) and may also be referred to as a base station, NR BS, Node B, gNB, 5G Node B (NB), access point, transmit receive point (TRP), etc. Each BS may provide communication coverage for a specific geographic area. In 3GPP, the term "cell" may refer to a coverage area of ​​a BS and / or a BS subsystem serving the coverage area, depending on the context in which the term is used.

[0043] A BS may provide communication coverage for a macro cell, a pico cell, a femto cell, and / or another type of cell. A macro cell may cover a relatively large geographic area (e.g., several kilometers in radius) and may allow unrestricted access by UEs with service subscription. A pico cell may cover a relatively small geographic area and may allow unrestricted access by UEs with service subscription. A femto cell may cover a relatively small geographic area (e.g., a residence) and may allow restricted access by UEs associated with the femto cell (e.g., UEs in a closed subscriber group (CSG)). A BS for a macro cell may be referred to as a macro BS. A BS for a pico cell may be referred to as a pico BS. A BS for a femto cell may be referred to as a femto BS or a home BS. In Figure 1 In the example shown in , BS 110a may be a macro BS for macro cell 102a, BS 110b may be a pico BS for pico cell 102b, and BS 110c may be a femto BS for femto cell 102c. A BS may support one or more (e.g., three) cells. The terms "eNB", "base station", "NR BS", "gNB", "TRP", "AP", "Node B", "5G NB", and "cell" may be used interchangeably herein.

[0044] In some aspects, the cells may not necessarily be stationary, and the geographic area of ​​the cells may move depending on the location of the mobile BS. In some aspects, the BSs may be interconnected with each other and / or with one or more other BSs or network nodes (not shown) in the wireless network 100 via various types of backhaul interfaces (e.g., direct physical connections, virtual networks, and / or similar interfaces using any suitable transport networks).

[0045] The wireless network 100 may also include a relay station. A relay station is an entity that can receive data transmissions from an upstream station (e.g., a BS or a UE) and send data transmissions to a downstream station (e.g., a UE or a BS). A relay station may also be a UE that is capable of relaying transmissions for other UEs. Figure 1 In the example shown in , a relay station 110d may communicate with a macro BS 110a and a UE 120d to facilitate communication between the BS 110a and the UE 120d. A relay station may also be referred to as a relay BS, a relay base station, a relay, or the like.

[0046] The wireless network 100 may be a heterogeneous network including different types of BSs (e.g., macro BSs, pico BSs, femto BSs, relay BSs, etc.). These different types of BSs may have different transmit power levels, different coverage areas, and different effects on interference in the wireless network 100. For example, a macro BS may have a high transmit power level (e.g., 5 to 40 watts), while a pico BS, a femto BS, and a relay BS may have a lower transmit power level (e.g., 0.1 to 2 watts).

[0047] The network controller 130 may be coupled to a group of BSs and may provide coordination and control for these BSs. The network controller 130 may communicate with the BSs via a backhaul. The BSs may also communicate with each other, for example, directly or indirectly via a wireless or wired backhaul. UEs 120 (e.g., 120a, 120b, 120c) may be dispersed throughout the wireless network 100, and each UE may be stationary or mobile. UEs may also be referred to as access terminals, terminals, mobile stations, subscriber units, stations, etc. A UE may be a cellular phone (e.g., a smart phone), a personal digital assistant (PDA), a wireless modem, a wireless communication device, a handheld device, a laptop computer, a cordless phone, a wireless local loop (WLL) station, a tablet device, a camera, a gaming device, a netbook, a smartbook, an ultrabook, a medical device or apparatus, a biometric sensor / device, a wearable device (smart watch, smart clothing, smart glasses, smart wristband, smart jewelry (e.g., smart ring, smart bracelet, etc.)), an entertainment device (e.g., a music or video device, or a satellite radio unit, etc.), a vehicle component or sensor, a smart meter / sensor, an industrial manufacturing equipment, a global positioning system device, or any other suitable device configured to communicate via a wireless or wired medium.

[0048] Some UEs may be considered as machine type communication (MTC) or evolved or enhanced machine type communication (eMTC) UEs. MTC and eMTC UEs include, for example, robots, drones, remote devices, sensors, meters, monitors, location tags, etc., which may communicate with a base station, another device (e.g., a remote device), or some other entity. A wireless node may provide a connection to a network (e.g., a wide area network such as the Internet or a cellular network) or a connection to a network, for example, via a wired or wireless communication link. Some UEs may be considered as Internet of Things (IoT) devices, and / or may be implemented as NB-IoT (narrowband Internet of Things) devices. Some UEs may be considered as customer premises equipment (CPE). UE 120 may be included inside a housing that houses components of UE 120 (such as a processor component, a memory component, etc.).

[0049] Generally, any number of wireless networks can be deployed in a given geographic area. Each wireless network can support a specific RAT and can operate on one or more frequencies. RAT can also be referred to as radio technology, air interface, etc. Frequency can also be referred to as carrier, frequency channel, etc. Each frequency can support a single RAT in a given geographic area to avoid interference between wireless networks of different RATs. In some cases, NR or 5G RAT networks can be deployed.

[0050] The wireless network 100 may include one or more roadside units (RSUs) 140 that may communicate with the UEs 120 and BSs 110 in the wireless network 100. The RSUs 140 may be wireless communication devices that communicate directly with the UEs 120 and / or other RSUs 140 in a V2X environment. The RSUs 140 may be located near a road, such as at a traffic light, on a light pole, on an overpass, and / or on other structures near a road. The RSUs 140 may receive data, control information, safety alerts, and / or other types of information, and may forward, relay, and / or otherwise send these types of information to other entities in the wireless network 100 (and / or outside the wireless network 100). For example, the RSUs 140 may provide basic safety alert messages to the UEs 120, may receive and forward positioning information associated with the UEs 120, and the like. In these environments, the UEs 120 may be V2X-enabled vehicles, may be deployed and associated with vehicles or pedestrians, and the like.

[0051] In some aspects, two or more UEs 120 (e.g., illustrated as UE 120a and UE 120e), two or more RSUs 140, and / or UE 120 and RSU 140 may communicate directly using one or more sidelink channels (e.g., without using base station 110 as an intermediary to communicate with each other). For example, UE 120 and RSU 140 may communicate using peer-to-peer (P2P) communication, device-to-device (D2D) communication, V2X protocol (e.g., which may include vehicle-to-vehicle (V2V) protocol, vehicle-to-infrastructure (V2I) protocol, etc.), mesh network, etc. In this case, some of UE 120 and RSU 140 may perform scheduling operations, resource selection operations, and / or other operations described elsewhere herein as being performed by base station 110.

[0052] As noted above, Figure 1 is provided as an example. Other examples may differ from those described above. Figure 1 Examples described.

[0053] Figure 2A and 2B 1 shows a base station 110, a UE 120 and an RSU 140 (which may be Figure 1 1. Block diagram of a design 200 of a base station, one of the UEs, and an RSU in FIG. 1. Base station 110 may be equipped with T antennas 234a through 234t, UE 120 may be equipped with R antennas 252a through 252r, and RSU 140 may be equipped with Q antennas 252a through 252q, where in general, T ≥ 1, Q ≥ 1, and R ≥ 1.

[0054] like Figure 2A As shown, at the base station 110, the transmit processor 220 can receive data for one or more UEs from the data source 212, select one or more modulation and coding schemes (MCS) for each UE based at least in part on a channel quality indicator (CQI) received from the UE, process (e.g., encode and modulate) the data for each UE based at least in part on the MCS selected for the UE, and provide data symbols for all UEs. The transmit processor 220 can receive data for one or more RSUs from the data source 212, select one or more MCSs for each RSU based at least in part on the CQI received from the RSU, process (e.g., encode and modulate) the data for the RSU based at least in part on the MCS selected for each RSU, and provide data symbols for all RSUs.

[0055] The transmit processor 220 may also process system information (e.g., for semi-static resource partitioning information (SRPI), etc.) and control information (e.g., CQI requests, grants, upper layer signaling, etc.), and provide overhead symbols and control symbols. The transmit processor 220 may also generate reference symbols for reference signals (e.g., cell-specific reference signals (CRS)) and synchronization signals (e.g., primary synchronization signals (PSS) and secondary synchronization signals (SSS)). The transmit (TX) multiple-input multiple-output (MIMO) processor 230 may perform spatial processing (e.g., precoding) on ​​data symbols, control symbols, overhead symbols, and / or reference symbols (if applicable), and may provide T output symbol streams to T modulators (MOD) 232a to 232t. Each modulator 232 may process a corresponding output symbol stream (e.g., for OFDM, etc.) to obtain an output sample stream. Each modulator 232 may further process (e.g., convert to analog, amplify, filter, and upconvert) the output sample stream to obtain a downlink signal. T downlink signals from modulators 232a through 232t may be transmitted via T antennas 234a through 234t, respectively.

[0043] According to various aspects described in greater detail below, synchronization signals may be generated with position coding to convey additional information.

[0056] like Figure 2A As shown, at UE 120, antennas 252a to 252r may receive downlink signals from base station 110 and / or other base stations, and may provide received signals to demodulators (DEMOD) 254a to 254r, respectively. Each demodulator 254 may adjust (e.g., filter, amplify, downconvert, and digitize) the received signal to obtain input samples. Each demodulator 254 may further process the input samples (e.g., for OFDM, etc.) to obtain received symbols. MIMO detector 256 may obtain received symbols from all R demodulators 254a to 254r, perform MIMO detection on the received symbols (if applicable), and provide detected symbols. Receive processor 258 may process (e.g., demodulate and decode) the detected symbols, provide decoded data for UE 120 to data sink 260, and provide decoded control information and system information to controller / processor 280. The channel processor may determine reference signal received power (RSRP), received signal strength indicator (RSSI), reference signal received quality (RSRQ), channel quality indicator (CQI), etc. In some aspects, one or more components of UE 120 may be included in a housing.

[0057] On the uplink, at the UE 120, a transmit processor 264 may receive and process data from a data source 262 and control information from a controller / processor 280 (e.g., for reports including RSRP, RSSI, RSRQ, CQI, etc.). The transmit processor 264 may also generate reference symbols for one or more reference signals. The symbols from the transmit processor 264 may be precoded by a TX MIMO processor 266 (if applicable), further processed by modulators 254a through 254r (e.g., for DFT-s-OFDM, CP-OFDM, etc.), and transmitted to the base station 110. At the base station 110, uplink signals from the UE 120 and other UEs may be received by the antenna 234, processed by the demodulator 232, detected by the MIMO detector 236 (if applicable), and further processed by the receive processor 238 to obtain decoded data and control information transmitted by the UE 120. The receive processor 238 may provide decoded data to a data sink 239 and provide decoded control information to a controller / processor 240. The base station 110 may include a communication unit 244 and communicate with the network controller 130 via the communication unit 244. The network controller 130 may include a communication unit 294, a controller / processor 290, and a memory 292.

[0058] On the sidelink, antennas 252a to 252r may receive sidelink signals from other UEs 120 and / or from RSUs 140, and may provide received signals to DEMODs 254a to 254r, respectively. Each demodulator 254 may condition the received signal to obtain input samples. Each demodulator 254 may further process the input samples to obtain received symbols. The MIMO detector 256 may obtain received symbols from all R demodulators 254a to 254r, perform MIMO detection on the received symbols (if applicable), and provide detected symbols. The receive processor 258 may process the detected symbols, provide decoded data for the UE 120 to the data sink 260, and provide decoded control information and system information to the controller / processor 280. The channel processor may determine RSRP, RSSI, RSRQ, CQI, etc. for the sidelink. The transmit processor 264 may receive and process data from the data source 262 and control information from the controller / processor 280 (e.g., for reports including RSRP, RSSI, RSRQ, CQI, etc.). The transmit processor 264 may also generate reference symbols for one or more reference signals. The symbols from the transmit processor 264 may be precoded by the TX MIMO processor 266 (if applicable), further processed by the modulators 254a through 254r (e.g., for DFT-s-OFDM, CP-OFDM, etc.), and transmitted on a sidelink to other UEs 120 and / or RSUs 140.

[0059] like Figure 2B As shown, at RSU 140, antennas 286a to 286q may receive downlink signals from base station 110 and / or other base stations, and may provide received signals to DEMODs 287a to 287q, respectively. Each demodulator 287 may condition (e.g., filter, amplify, downconvert, and digitize) the received signal to obtain input samples. Each demodulator 287 may further process the input samples (e.g., for OFDM, etc.) to obtain received symbols. The MIMO detector 288 may obtain received symbols from all Q demodulators 287a to 287q, perform MIMO detection on the received symbols (if applicable), and provide detected symbols. The receive processor 289 may process (e.g., demodulate and decode) the detected symbols, provide decoded data for RSU 140 to the data sink 290, and provide decoded control information and system information to the controller / processor 294. The channel processor may determine RSRP, RSSI, RSRQ, CQI, etc. In some aspects, one or more components of the RSU 140 may be included in a housing.

[0060] On the uplink, at the RSU 140, a transmit processor 292 may receive and process data from a data source 293 and control information from a controller / processor 294 (e.g., for reports including RSRP, RSSI, RSRQ, CQI, etc.). The transmit processor 292 may also generate reference symbols for one or more reference signals. The symbols from the transmit processor 292 may be precoded by the TX MIMO processor 291 (if applicable), further processed by the modulators 287a to 287q (e.g., for DFT-s-OFDM, CP-OFDM, etc.), and transmitted to the base station 110. At the base station 110, uplink signals from the RSU 140 and other RSUs may be received by the antenna 234, processed by the demodulator 232, detected by the MIMO detector 236 (if applicable), and further processed by the receive processor 238 to obtain decoded data and control information transmitted by the RSU 140. The receive processor 238 may provide the decoded data to the data sink 239 and provide the decoded control information to the controller / processor 240. The base station 110 may include a communication unit 244 and communicate with the network controller 130 via the communication unit 244. The network controller 130 may include a communication unit 283, a controller / processor 284, and a memory 285.

[0061] On the sidelink, antennas 286a to 286q may receive sidelink signals from UE 120 and / or from other RSUs 140, and may provide received signals to DEMODs 287a to 287q, respectively. Each demodulator 287 may condition the received signal to obtain input samples. Each demodulator 287 may further process the input samples to obtain received symbols. The MIMO detector 288 may obtain received symbols from all Q demodulators 287a to 287r, perform MIMO detection on the received symbols (if applicable), and provide detected symbols. The receive processor 289 may process the detected symbols, provide decoded data for RSU 140 to the data sink 29, and provide decoded control information and system information to the controller / processor 2974. The channel processor may determine RSRP, RSSI, RSRQ, CQI, etc. for the sidelink. The transmit processor 292 may receive and process data from a data source 293 and control information from a controller / processor 294 (e.g., for reports including RSRP, RSSI, RSRQ, CQI, etc.). The transmit processor 292 may also generate reference symbols for one or more reference signals. The symbols from the transmit processor 292 may be precoded by a TX MIMO processor 2991 (if applicable), further processed by modulators 287a through 287q (e.g., for DFT-s-OFDM, CP-OFDM, etc.), and transmitted on a sidelink to the UE 120 and / or other RSUs 140.

[0062] The controller / processor 240 of the base station 110, the controller / processor 280 of the UE 120, the controller / processor 294 of the RSU 140, and / or Figure 2A and / or any other components in 2B may perform one or more techniques associated with relaying resource reservation information on the sidelink, as described in more detail elsewhere herein. For example, controller / processor 240 of base station 110, controller / processor 280 of UE 120, controller / processor 294 of RSU 140, and / or Figure 2A and / or any other component in 2B may perform or direct e.g. Figure 4 The operations of process 400 and / or other processes as described herein. Memories 242, 282, and 295 may store data and program codes for base station 110, UE 120, and RSU 140, respectively. In some aspects, memory 242, memory 282, and / or memory 294 may include a non-transitory computer-readable medium storing one or more instructions for wireless communication. For example, the one or more instructions, when executed by one or more processors of base station 110, UE 120, and / or RSU 140, may perform or direct, for example, Figure 4The process 400 and / or other processes described herein may be performed by the scheduler 246. The scheduler 246 may schedule the UE and / or RSU for data transmission on the downlink and / or uplink. In some aspects, the scheduler 246 may schedule the UE and / or RSU for data transmission on the sidelink.

[0063] In some aspects, the UE 120 may include: means for receiving resource reservation information associated with a second wireless communication device (e.g., a second UE 120 or an RSU 140) on a sidelink, wherein the resource reservation information identifies a sidelink resource reserved for the second wireless communication device for transmission on the sidelink; means for sending the resource reservation information on the sidelink to a third wireless communication device (e.g., a third UE 120 or another RSU 140); and so on. In some aspects, such means may include combining Figure 2A One or more components of UE 120 are depicted, such as controller / processor 280, transmit processor 264, TX MIMO processor 266, MOD 254, antenna 252, DEMOD 254, MIMO detector 256, receive processor 258, etc.

[0064] In some aspects, the RSU 140 may include: means for receiving resource reservation information associated with a second wireless communication device (e.g., UE 120 or a second RSU 140) on a sidelink, wherein the resource reservation information identifies a sidelink resource reserved for the second wireless communication device for transmission on the sidelink; means for sending the resource reservation information on the sidelink to a third wireless communication device (e.g., another UE 120 or a third RSU 140); and so on. In some aspects, such means may include combining Figure 2B One or more components of the RSU 140 are depicted, such as a controller / processor 294, a transmit processor 292, a TX MIMO processor 291, a MOD 287, an antenna 286, a DEMOD 287, a MIMO detector 288, a receive processor 289, and the like.

[0065] As noted above, Figure 2A and 2B is provided as an example. Other examples may differ from those described above. Figure 2A and 2B Examples described.

[0066] In a wireless network, a wireless communication device (e.g., a UE or an RSU) may use various resource reservation techniques to reserve sidelink resources for transmission on a sidelink. For example, a BS may reserve sidelink resources for a wireless communication device, and may send resource reservation information associated with the reserved sidelink resources to the wireless communication device. This may be referred to as NR mode 1 sidelink resource allocation. As another example, a wireless communication device may autonomously reserve sidelink resources without assistance from a BS. This may be referred to as NR mode 2 sidelink resource allocation.

[0067] To autonomously reserve sidelink resources for transmission on the sidelink, the wireless communication device may monitor sidelink communications carrying resource reservation information associated with other wireless communication devices. The wireless communication device may determine available sidelink resources on the sidelink based at least in part on the resource reservation information from the other wireless communication devices, and may select the sidelink resources for transmission on the sidelink from the available sidelink resources.

[0068] In some cases, the wireless communication may miss or fail to receive resource reservation information from another wireless communication device. For example, the wireless communication device may experience interference, degraded sidelink channel conditions, temporary blocking or obstruction, etc., which may block the sidelink communication carrying resource reservation information or may cause the sidelink communication to be undecodable. As another example, the wireless communication device may operate in half-duplex mode, in which case the wireless communication device may transmit or receive at a given time. Therefore, when the wireless communication device is transmitting, the wireless communication device may not be able to receive sidelink communications carrying resource reservation information from other wireless communication devices.

[0069] If a wireless communication device misses or does not receive resource reservation information from another wireless communication device, the wireless communication device may attempt to reserve sidelink resources that have already been reserved by another wireless communication device. This may cause sidelink communications from the wireless communication device to conflict on the sidelink, which may cause the sidelink communications to be undecodable. Therefore, these conflicts increase the likelihood that the sidelink communications will be discarded, which may result in increased retransmissions of the sidelink communications. In addition, if the sidelink communications need to be retransmitted, these sidelink communications suffer increased latency, which may cause safety issues in some V2X safety applications.

[0070] Some aspects described herein provide techniques for relaying resource reservation information on a sidelink. In some aspects, a first wireless communication device (e.g., UE 120 or RSU 140) may receive resource reservation information associated with a second wireless communication device on a sidelink. The first wireless communication device may forward, relay, and / or otherwise send the reservation information to the other wireless communication device on a sidelink.

[0071] In this manner, if the third wireless communication device fails to receive resource reservation information directly from the second wireless communication device (e.g., due to interference, due to the third wireless communication device transmitting when the resource reservation information is to be received, etc.), the third wireless communication device can receive resource reservation information from the first wireless communication device. This reduces and / or eliminates the likelihood that the third wireless communication device will attempt to reserve sidelink resources that have already been reserved for the second wireless communication device, which reduces and / or eliminates conflicts on the sidelink, reduces the likelihood that sidelink communications will be dropped, and reduces safety issues in various V2X safety applications.

[0072] Figure 3A and 3B is a diagram illustrating one or more examples 300 of relaying resource reservation information on a sidelink in accordance with various aspects of the present disclosure. Figure 3A and 3B As shown, example 300 includes communications between multiple wireless communication devices (e.g., UE 120 and / or RSU 140). In some aspects, the wireless communication devices (e.g., wireless communication device 1 to wireless communication device n) can be included in a wireless network (such as wireless network 100). In some aspects, the wireless communication devices can communicate on a sidelink (e.g., without using BS 110 as an intermediary to communicate with each other).

[0073] As in Figure 3A , and as indicated by reference numeral 302, wireless communication device 1 may transmit resource reservation information associated with wireless communication device 1 on a sidelink. In some aspects, wireless communication device 1 may transmit resource reservation information on a sidelink to one or more other wireless communication devices, such as wireless communication device 2, wireless communication device 3, etc.

[0074] In some aspects, the resource reservation information may identify one or more sidelink resources reserved for transmission on the sidelink for the wireless communication device 1. For example, the resource reservation information may include: an indication of one or more frequency domain resources (e.g., resource elements, resource blocks, subchannels, subcarriers, component carriers, etc.) for transmission on the sidelink, an indication of one or more time domain resources (e.g., one or more symbols, one or more time slots, etc.) for transmission on the sidelink, etc. In some aspects, the one or more sidelink resources may be indicated by a binary bitmap, a resource reservation list, etc.

[0075] In some aspects, one or more sidelink resources may be reserved via an NR Mode 1 sidelink resource allocation, wherein BS 110 reserves one or more sidelink resources for wireless communication device 1 and sends an indication of the one or more sidelink resources in a scheduling grant to wireless communication device 1. In some aspects, one or more sidelink resources may be reserved via an NR Mode 2 sidelink resource, wherein wireless communication device 1 autonomously reserves one or more sidelink resources without assistance from BS 110.

[0076] In some aspects, the resource reservation information may include a source identifier associated with the wireless communication device 1. The source identifier may identify the wireless communication device 1 as the source of one or more sidelink communications to be sent in the reserved sidelink resources. In some aspects, the resource reservation information may include a destination identifier. The destination identifier may identify a destination wireless communication device for the one or more sidelink communications.

[0077] In some aspects, the resource reservation information may include a hybrid automatic repeat request (HARQ) identifier for one or more sidelink communications. The HARQ identifier may identify the HARQ process to be used for one or more sidelink communications. In some aspects, the resource reservation information may include an area identifier associated with the wireless communication device 1. The area identifier may identify the area in the cell of the BS where the wireless communication device 1 is located. In some aspects, the resource reservation information may include other location information associated with the wireless communication device 1.

[0078] In some aspects, wireless communication device 1 may send a resource reservation to one or more other wireless communication devices on a physical sidelink control channel (PSCCH). For example, wireless communication device 1 may send a resource reservation in a sidelink control information first part (SCI-1) on the PSCCH. SCI-1 may be the first part of a two-part SCI communication sent by wireless communication device 1.

[0079] As in Figure 3BIn the figure and as indicated by reference numeral 304, other wireless communication devices (e.g., wireless communication devices 2 to wireless communication devices n) may forward, relay, and / or otherwise send resource reservation information associated with wireless communication device 1 to one or more wireless communication devices on a sidelink. For example, wireless communication device 2 may forward, relay, and / or otherwise send resource reservation information to one or more of wireless communication devices 3 to wireless communication devices n on a sidelink, and wireless communication device 3 may forward, relay, and / or otherwise send resource reservation information to one or more of wireless communication devices 2 and / or wireless communication devices 4 to wireless communication devices n on a sidelink, and so on.

[0080] In some aspects, the wireless communication device may forward, relay, and / or otherwise transmit resource reservation information on a sidelink to one or more other wireless communication devices by transmitting the resource reservation information in SCI-1 on the PSCCH. In these cases, the SCI-1 of the wireless communication device may repeat the SCI-1 received from the wireless communication device 1. In some aspects, the wireless communication device may also include the sidelink control information second part (SCI-2) of the two-part SCI associated with the wireless communication device 1 in the SCI-1 of the wireless communication device.

[0081] In some aspects, the SCI-1 of wireless communication can support including resource reservation information for multiple sidelink transmissions. In these cases, the wireless communication device can include resource reservation information associated with the wireless communication device 1 and resource reservation information associated with the wireless communication device in the SCI-1 of the wireless communication device. This allows the wireless communication device to reserve sidelink resources when forwarding, relaying and / or otherwise sending resource reservation information associated with the wireless communication device.

[0082] In some aspects, a wireless communication device may forward, relay, and / or otherwise send resource reservation information on a sidelink to one or more other wireless communication devices by sending the resource reservation information in an SCI-2 of a two-part SCI associated with the wireless communication device. In these cases, the wireless communication device may send the SCI-2 on a physical sidelink shared channel (PSSCH). In some aspects, the SCI-2 may include a new format for the SCI-2 that supports including the resource reservation information in the SCI-2.

[0083] In some aspects, a wireless communication device may forward, relay, and / or otherwise send resource reservation information on a sidelink to one or more other wireless communication devices by piggybacking resource reservation on data communications sent on the PSSCH. In these cases, the resource reservation information may be included in a medium access control element (MAC-CE) communication on the PSSCH. In some aspects, a wireless communication device may forward, relay, and / or otherwise send resource reservation information to one or more other wireless communication devices in a MAC-CE on the PSSCH on a sidelink without an accompanying data transmission.

[0084] In some aspects, a wireless communication device may include additional information along with the resource reservation information when forwarding, relaying, and / or otherwise transmitting resource reservation information associated with another wireless communication device. For example, if wireless communication device 2 forwards, relays, and / or otherwise transmits resource reservation information associated with wireless communication device 1 on a sidelink, wireless communication device 2 may also include an area identifier and / or other location information associated with wireless communication device 2, one or more signal measurements associated with wireless communication device 1 and performed by wireless communication device 2 (e.g., RSRP measurement, RSSI measurement, RSRQ measurement, CQI measurement, etc.), and the like.

[0085] In some aspects, a wireless communication device may forward, relay, and / or otherwise transmit resource reservation information associated with multiple wireless communication devices in a single sidelink communication on a sidelink. For example, wireless communication device 2 may receive resource reservation information from wireless communication device 1 and wireless communication device 3 on a sidelink, and may forward, relay, and / or otherwise transmit resource reservation information received from wireless communication device 1 and wireless communication device 3 on a sidelink in a single sidelink communication on a sidelink.

[0086] In some aspects, each wireless communication device (eg, each of wireless communication devices 1 to n) may be configured in combination with the above. Figure 3A and 3B In a similar manner as described above, the corresponding resource reservation on the side link is sent to one or more other wireless communication devices on the side link. Figure 3A and 3B , each wireless communication device (for example, each of wireless communication devices 1 to wireless communication devices n) can receive resource reservation information on the sidelink from one or more other wireless communication devices on the sidelink, and can forward, relay and / or otherwise send the received reservation information to one or more other wireless communication devices on the sidelink.

[0087] In this manner, if the first wireless communication device fails to receive resource reservation information directly from the second wireless communication device (e.g., due to interference, due to the wireless communication device transmitting when the resource reservation information was to be received, etc.), the first wireless communication device can receive resource reservation information from the third wireless communication device. This reduces and / or eliminates the likelihood that the first wireless communication device will attempt to reserve sidelink resources that have already been reserved for the second wireless communication device, which reduces and / or eliminates conflicts on the sidelink, reduces the likelihood that sidelink communications will be dropped, and reduces safety issues in various V2X safety applications.

[0088] As noted above, Figure 3A and 3B is provided as one or more examples. Other examples may differ from Figure 3A and 3B Examples described.

[0089] Figure 4 4 is a diagram illustrating an example process 400 performed, for example, by a first wireless communication device, according to various aspects of the present disclosure. The example process 400 is a diagram in which the first wireless communication device (e.g., Figure 1 UE120 shown and described in 2, the above combined Figure 1 and 2 shown and described RSU 140, the above combined Figure 3A and 3B Examples of wireless communication devices (eg, shown and described) performing operations associated with relaying resource reservation information on a sidelink.

[0090] like Figure 4 As shown, in some aspects, process 400 may include: receiving resource reservation information associated with the second wireless communication device on a sidelink from the second wireless communication device, wherein the resource reservation information identifies the sidelink resources reserved for the second wireless communication device for transmission on the sidelink (block 410). For example, the first wireless communication device (e.g., using antenna 252, antenna 286, DEMOD 254, DEMOD 287, MIMO detector 256, MIMO detector 288, receive processor 258, receive processor 289, controller / processor 280, controller / processor 294, memory 282, memory 295, etc.) may receive resource reservation information associated with the second wireless communication device on a sidelink from the second wireless communication device, as described above. In some aspects, the resource reservation information identifies the sidelink resources reserved for the second wireless communication device for transmission on the sidelink.

[0091] like Figure 4As further shown in FIG. 4 , in some aspects, process 400 may include sending resource reservation information to a third wireless communication device on a sidelink (block 420). For example, the first wireless communication device (e.g., using antenna 252, antenna 286, MOD 254, MOD 287, TX MIMO processor 266, MIMO processor 291, transmit processor 264, transmit processor 292, controller / processor 280, controller / processor 294, memory 282, memory 295, etc.) may send resource reservation information to a third wireless communication device on a sidelink, as described above.

[0092] Process 400 may include additional aspects, such as any single aspect or any combination of aspects described below and / or in conjunction with one or more other processes described elsewhere herein.

[0093] In a first aspect, sending the resource reservation information to the third wireless communication device comprises sending the resource reservation information together with other resource reservation information associated with the first wireless communication device. In a second aspect, alone or in combination with the first aspect, sending the resource reservation information to the third wireless communication device comprises sending the resource reservation information in a second part of a two-part sidelink control information communication on a physical sidelink shared channel.

[0094] In a third aspect, alone or in combination with one or more of the first and second aspects, sending the resource reservation information to the third wireless communication device comprises: sending the resource reservation information in a medium access control control element communication on a physical sidelink shared channel together with other shared data. In a fourth aspect, alone or in combination with one or more of the first to third aspects, sending the resource reservation information to the third wireless communication device comprises: sending the resource reservation information in a medium access control control element communication on a physical sidelink shared channel without other shared channel data.

[0095] In a fifth aspect, alone or in combination with one or more of the first to fourth aspects, sending the resource reservation information to the third wireless communication device comprises: sending the resource reservation information in a first part of a two-part sidelink control information communication on a physical sidelink control channel. In a sixth aspect, alone or in combination with one or more of the first to fifth aspects, the resource reservation information comprises at least one of the following: an indication of one or more frequency domain resources for transmission by the second wireless communication device on the sidelink, an indication of one or more time domain resources for transmission by the second wireless communication device on the sidelink, a source identifier associated with the second wireless communication device, a destination identifier associated with a destination wireless communication device for one or more sidelink communications to be sent by the second wireless communication device on the sidelink, a hybrid automatic repeat request identifier for the one or more sidelink communications, an area identifier associated with the second wireless communication device, an area identifier associated with the first wireless communication device, or a reference signal received power measurement generated by the first wireless communication device and used for the second wireless communication device.

[0096] In the seventh aspect, alone or in combination with one or more of the first to sixth aspects, process 400 includes: receiving other resource reservation information associated with the one or more fourth wireless communication devices from one or more fourth wireless communication devices on the sidelink; and sending the resource reservation information to the third wireless communication device includes: sending the resource reservation information together with the other resource reservation information to the third wireless communication device. In the eighth aspect, alone or in combination with one or more of the first to seventh aspects, sending the resource reservation information to the third wireless communication device includes: sending the resource reservation information to the third wireless communication device and one or more fourth wireless communication devices.

[0097] In the ninth aspect, either alone or in combination with one or more of the first to eighth aspects, the sidelink resource is autonomously reserved by the second wireless communication device. In the tenth aspect, either alone or in combination with one or more of the first to ninth aspects, the sidelink resource is allocated to the second wireless communication device by a base station. In the eleventh aspect, either alone or in combination with one or more of the first to tenth aspects, each of the first wireless communication device, the second wireless communication device, and the third wireless communication device is a user equipment or a roadside unit.

[0098] Although Figure 4Example blocks of process 400 are shown, but in some aspects, process 400 may include Figure 4 The blocks depicted in the process 400 may include additional blocks, fewer blocks, different blocks, or blocks arranged in a different manner than those depicted in the process 400. Additionally or alternatively, two or more blocks in the blocks of process 400 may be executed in parallel.

[0099] Figure 5 5 is a conceptual data flow diagram 500 illustrating the data flow between different components in an example apparatus 502. The apparatus 502 may be a UE (e.g., Figure 1 UE 120 shown and described in 2), RSU (eg, the above combined Figure 1 and 2 shown and described RSU 140), wireless communication devices (e.g., the above combined Figure 3A and 3B In some aspects, the apparatus 502 includes a receiving component 504 and a sending component 506.

[0100] In some aspects, receiving component 504 may receive resource reservation information 508 associated with apparatus 550 from another apparatus 550 (e.g., UE 120, RSU 140, wireless communication device, etc.) on the sidelink. In some aspects, resource reservation information 508 identifies sidelink resources reserved for transmission on the sidelink for apparatus 550. In some aspects, transmitting component 506 may transmit resource reservation information 508 to another apparatus 560 (e.g., UE 120, RSU 140, wireless communication device, etc.) on the sidelink.

[0101] In some aspects, the receiving component 504 may include an antenna (e.g., antenna 252, antenna 286, etc.), a DEMOD (e.g., DEMOD 254, DEMOD 287, etc.), a MIMO detector (e.g., MIMO detector 256, MIMO detector 288, etc.), a receiving processor (e.g., receiving processor 258, receiving processor 289, etc.), a controller / processor (e.g., controller / processor 280, controller / processor 294, etc.), a memory (e.g., memory 282, memory 295, etc.), etc. In some aspects, the transmit component 506 may include an antenna (e.g., antenna 252, antenna 286, etc.), a MOD (e.g., MOD 254, MOD 287, etc.), a MIMO processor (e.g., TX MIMO processor 266, MIMO processor 291, etc.), a transmit processor (e.g., transmit processor 264, transmit processor 292, etc.), a controller / processor (e.g., controller / processor 280, controller / processor 294, etc.), a memory (e.g., memory 282, memory 295, etc.), etc.

[0102] The device 502 may include executing the above Figure 4 Each block of the algorithm in the process 400 and the like may be additionally configured as a component. Figure 4 Each block in the process 400, etc. of the present invention may be included in the present invention, and the apparatus may include one or more of those components. The components may be one or more hardware components specifically configured to perform the process / algorithm, implemented by a processor configured to perform the process / algorithm, stored in a computer-readable medium for implementation by a processor, or some combination thereof.

[0103] exist Figure 5 The number and arrangement of components shown in the figure are provided as examples. Figure 5 There may be additional components, fewer components, different components, or components arranged in a different manner than those components shown in FIG. Figure 5 Two or more components shown in may be implemented in a single component, or in Figure 5 A single component shown in may be implemented as multiple distributed components. Additionally or alternatively, Figure 5 A set of components (e.g., one or more components) shown in can perform the operations described in Figure 5 One or more functions performed by another set of components shown in FIG.

[0104] The foregoing disclosure provides illustration and description, but is not intended to be exhaustive or to limit the aspects to the precise forms disclosed. Modifications and variations are possible in light of the above disclosure or may be acquired from practice of the various aspects.

[0105] As used herein, the term "component" is intended to be broadly interpreted as hardware, firmware, and / or a combination of hardware and software. As used herein, a "processor" is implemented with hardware, firmware, and / or a combination of hardware and software.

[0106] As used herein, satisfying a threshold may refer to a value being greater than a threshold, greater than or equal to a threshold, less than a threshold, less than or equal to a threshold, equal to a threshold, not equal to a threshold, etc., depending on the context.

[0107] It will be apparent that the systems and / or methods described herein may be implemented with various forms of hardware, firmware, and / or combinations of hardware and software. The actual specialized control hardware or software code used to implement these systems and / or methods is not limiting in any respect. Therefore, the operation and behavior of the systems and / or methods are described herein without reference to specific software code, it being understood that software and hardware may be designed to implement the systems and / or methods based, at least in part, on the description herein.

[0108] Even if the specific combination of features is recorded in the claims and / or disclosed in the specification, these combinations are not intended to limit the disclosure of various aspects. In fact, many of these features can be combined in a manner that is not specifically recorded in the claims and / or specifically disclosed in the specification. Although each dependent claim listed below can only directly depend on one claim, the disclosure of various aspects includes the combination of each dependent claim with each other claim in the claim set. The phrase "at least one of" referring to the list of items refers to any combination of those items, including a single member. For example, "at least one of a, b or c" is intended to cover a, b, c, ab, ac, bc and abc, and any combination with multiples of the same element (e.g., aa, aaa, aab, aac, abb, acc, bb, bbb, bbc, cc and ccc or any other ordering of a, b and c).

[0109] None of the elements, actions or instructions used herein should be interpreted as key or necessary, unless explicitly described as such. In addition, as used herein, the articles "a" and "an" are intended to include one or more items, and can be used interchangeably with "one or more". In addition, as used herein, the terms "set" and "group" are intended to include one or more items (e.g., related items, unrelated items, combinations of related items and unrelated items, etc.), and can be used interchangeably with "one or more". In the case of only one project being expected, the phrase "only one" or similar language is used. In addition, as used herein, the terms "has", "have", "having" and / or similar terms are intended to be open terms. In addition, unless otherwise explicitly stated, the phrase "based on" is intended to mean "based at least in part on".

Claims

1. A method of wireless communication performed by a first wireless communication device, comprising: receiving first sidelink control information (SCI) from a second wireless communication device, wherein the first SCI identifies a sidelink resource reserved for the second wireless communication device, and A second SCI is sent to a third wireless communication device, wherein the second SCI is based at least in part on the first SCI, wherein the first SCI is a first part of a two-part SCI and the second SCI is a second part of the two-part SCI.

2. The method according to claim 1, wherein: The second SCI identifies the sidelink resource.

3. The method according to claim 1, wherein: The second SCI is included in the first SCI.

4. The method according to claim 1, wherein: Receiving the first SCI includes: The first SCI is received on a physical sidelink control channel (PSCCH).

5. The method according to claim 1, wherein: Sending the second SCI includes: The second SCI is sent on a physical sidelink shared channel (PSSCH).

6. The method according to claim 1, wherein: The first SCI includes an indication of at least one of the following: One or more frequency domain resources, or, One or more time domain resources.

7. The method according to claim 1, further comprising: The resource reservation information identified in the first SCI is sent to a fourth wireless communication device.

8. A first wireless communication device for wireless communication, comprising: one or more memories; as well as One or more processors coupled to the one or more memories, configured to: receiving first sidelink control information (SCI) from a second wireless communication device, wherein the first SCI identifies a sidelink resource reserved for the second wireless communication device, and A second SCI is sent to a third wireless communication device, wherein the second SCI is based at least in part on the first SCI, wherein the first SCI is a first part of a two-part SCI and the second SCI is a second part of the two-part SCI.

9. The first wireless communication device according to claim 8, wherein: The second SCI identifies the sidelink resource.

10. The first wireless communication device according to claim 8, wherein: The second SCI is included in the first SCI.

11. The first wireless communication device according to claim 8, wherein: To receive the first SCI, the one or more processors are configured to: The first SCI is received on a physical sidelink control channel (PSCCH).

12. The first wireless communication device according to claim 8, wherein: To send the second SCI, the one or more processors are configured to: The second SCI is sent on a physical sidelink shared channel (PSSCH).

13. The first wireless communication device according to claim 8, wherein: The first SCI includes an indication of at least one of the following: One or more frequency domain resources, or, One or more time domain resources.

14. The first wireless communication device according to claim 8, wherein: The one or more processors are further configured to: The resource reservation information identified in the first SCI is sent to a fourth wireless communication device.

15. A non-transitory computer-readable medium storing a set of instructions for wireless communication, the set of instructions comprising: One or more instructions, which when executed by one or more processors of a first wireless communication device, cause the first wireless communication device to perform the following operations: receiving first sidelink control information (SCI) from a second wireless communication device, wherein the first SCI identifies a sidelink resource reserved for the second wireless communication device, and A second SCI is sent to a third wireless communication device, wherein the second SCI is based at least in part on the first SCI, wherein the first SCI is a first part of a two-part SCI and the second SCI is a second part of the two-part SCI.

16. The non-transitory computer readable medium of claim 15, wherein: The second SCI identifies the sidelink resource.

17. The non-transitory computer readable medium of claim 15, wherein: The second SCI is included in the first SCI.

18. The non-transitory computer readable medium of claim 15, wherein: The one or more instructions that cause the first wireless communication device to receive the first SCI cause the first wireless communication device to: The first SCI is received on a physical sidelink control channel (PSCCH).

19. The non-transitory computer readable medium of claim 15, wherein: The one or more instructions that cause the first wireless communication device to send the second SCI cause the first wireless communication device to perform the following operations: The second SCI is sent on a physical sidelink shared channel (PSSCH).

20. The non-transitory computer readable medium of claim 15, wherein: The first SCI includes an indication of at least one of the following: One or more frequency domain resources, or, One or more time domain resources.

21. The non-transitory computer readable medium of claim 15, wherein: The one or more instructions further cause the first wireless communication device to: The resource reservation information identified in the first SCI is sent to a fourth wireless communication device.

22. A first device for wireless communication, comprising: means for receiving first sidelink control information (SCI) from a second apparatus, wherein the first SCI identifies sidelink resources reserved for the second apparatus; and Means for sending a second SCI to a third device, wherein the second SCI is based at least in part on the first SCI, wherein the first SCI is a first part of a two-part SCI and the second SCI is a second part of the two-part SCI.

23. The first device according to claim 22, wherein: The second SCI identifies the sidelink resource.

24. The first device according to claim 22, wherein: The second SCI is included in the first SCI.

25. The first device according to claim 22, wherein: The unit for receiving the first SCI comprises: Means for receiving the first SCI on a physical sidelink control channel (PSCCH).

26. The first device according to claim 22, wherein: The unit for sending the second SCI includes: Means for transmitting the second SCI on a physical sidelink shared channel (PSSCH).

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