EP4218358A1 - Réception discontinue (drx) avec liaison latérale (sl) - Google Patents

Réception discontinue (drx) avec liaison latérale (sl)

Info

Publication number
EP4218358A1
EP4218358A1 EP21801377.9A EP21801377A EP4218358A1 EP 4218358 A1 EP4218358 A1 EP 4218358A1 EP 21801377 A EP21801377 A EP 21801377A EP 4218358 A1 EP4218358 A1 EP 4218358A1
Authority
EP
European Patent Office
Prior art keywords
pscch
base station
sci
drx
over
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Pending
Application number
EP21801377.9A
Other languages
German (de)
English (en)
Inventor
Jung Ho Ryu
Sony Akkarakaran
Tao Luo
Junyi Li
Jelena Damnjanovic
Jing Sun
Ozcan Ozturk
Peter Gaal
Juan Montojo
Xiaoxia Zhang
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Qualcomm Inc
Original Assignee
Qualcomm Inc
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Priority claimed from US17/448,665 external-priority patent/US11849396B2/en
Application filed by Qualcomm Inc filed Critical Qualcomm Inc
Publication of EP4218358A1 publication Critical patent/EP4218358A1/fr
Pending legal-status Critical Current

Links

Classifications

    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W76/00—Connection management
    • H04W76/20—Manipulation of established connections
    • H04W76/28—Discontinuous transmission [DTX]; Discontinuous reception [DRX]
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W52/00—Power management, e.g. TPC [Transmission Power Control], power saving or power classes
    • H04W52/02—Power saving arrangements
    • H04W52/0209—Power saving arrangements in terminal devices
    • H04W52/0212—Power saving arrangements in terminal devices managed by the network, e.g. network or access point is master and terminal is slave
    • H04W52/0216—Power saving arrangements in terminal devices managed by the network, e.g. network or access point is master and terminal is slave using a pre-established activity schedule, e.g. traffic indication frame
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W76/00—Connection management
    • H04W76/10—Connection setup
    • H04W76/14—Direct-mode setup
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W76/00—Connection management
    • H04W76/20—Manipulation of established connections
    • H04W76/23—Manipulation of direct-mode connections
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W72/00—Local resource management
    • H04W72/20—Control channels or signalling for resource management
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W72/00—Local resource management
    • H04W72/20—Control channels or signalling for resource management
    • H04W72/23—Control channels or signalling for resource management in the downlink direction of a wireless link, i.e. towards a terminal
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02D—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN INFORMATION AND COMMUNICATION TECHNOLOGIES [ICT], I.E. INFORMATION AND COMMUNICATION TECHNOLOGIES AIMING AT THE REDUCTION OF THEIR OWN ENERGY USE
    • Y02D30/00—Reducing energy consumption in communication networks
    • Y02D30/70—Reducing energy consumption in communication networks in wireless communication networks

Definitions

  • aspects of the present disclosure relate generally to wireless communication systems, and more particularly, to discontinuous reception (DRX) communications.
  • DRX discontinuous reception
  • Certain embodiments of the technology discussed below may enable and provide sidelink (SL) DRX communications in SL mode 1 and/or mode 2.
  • Wireless communication networks are widely deployed to provide various communication services such as voice, video, packet data, messaging, broadcast, and the like. These wireless networks may be multiple-access networks capable of supporting multiple users by sharing the available network resources. Such networks, which are usually multiple access networks, support communications for multiple users by sharing the available network resources.
  • a wireless communication network may include a number of base stations or node Bs that may support communication for a number of user equipments (UEs).
  • a UE may communicate with a base station via downlink and uplink.
  • the downlink (or forward link) refers to the communication link from the base station to the UE
  • the uplink (or reverse link) refers to the communication link from the UE to the base station.
  • a base station may transmit data and control information on the downlink to a UE and/or may receive data and control information on the uplink from the UE.
  • a transmission from the base station may encounter interference due to transmissions from neighbor base stations or from other wireless radio frequency (RF) transmitters.
  • RF radio frequency
  • a transmission from the UE may encounter interference from uplink transmissions of other UEs communicating with the neighbor base stations or from other wireless RF transmitters. This interference may degrade performance on both the downlink and uplink.
  • a method of wireless communication includes receiving, by a first UE in communication with a second UE over an SL, SL control information (SCI) in a physical SL control channel (PSCCH) from the second UE.
  • the first UE is operating in DRX mode, and the PSCCH is received by the first UE during an active period of a DRX cycle of the first UE.
  • the method also includes extending, in response to receiving the SL control information in the PSCCH from the second UE, the active period of the DRX cycle in which the SL control information in the PSCCH is received from the second UE when the PSCCH indicates a subsequent data transmission over the SL from the second UE to the first UE.
  • a method of wireless communication includes receiving, by a first UE in communication with a second UE over an SL, a transmission grant from a base station serving the first UE and the second UE, and transmitting, by the first UE, SCI in a PSCCH to the second UE.
  • the second UE is operating in DRX mode, and the SCI in the PSCCH is received by the second UE during an active period of a DRX cycle of the second UE.
  • the SCI includes configuration for a subsequent data transmission from the first UE to the second UE over the SL.
  • transmitting the SCI in the PSCCH to the second UE causes the second UE to extend the active period of the DRX cycle of the second UE in which the SCI in the PSCCH is received when the PSCCH indicates the subsequent data transmission over the SL from the first UE to the second UE.
  • a method of wireless communication includes transmitting, by a base station serving a first UE and a second UE, a transmission grant to the first UE, the first UE in communication with the second UE over an SL.
  • the second UE operating in DRX mode and the transmission grant causes the first UE to send SCI in a PSCCH to the second UE, the SCI including configuration for a subsequent data transmission from the first UE to the second UE over the SL.
  • the SCI in the PSCCH is received by the second UE during an active period of a DRX cycle of the second UE, and receiving the SCI in the PSCCH from the first UE causes the second UE to extend the active period of the DRX cycle of the second UE in which the SCI in the PSCCH is received when the PSCCH indicates the subsequent data transmission over the SL from the first UE to the second UE.
  • an apparatus configured for wireless communication includes means for receiving, by a first UE in communication with a second UE over an SL, SCI in a PSCCH from the second UE.
  • the first UE is operating in DRX mode, and the PSCCH is received by the first UE during an active period of a DRX cycle of the first UE.
  • the apparatus also includes means for extending, in response to receiving the SL control information in the PSCCH from the second UE, the active period of the DRX cycle in which the SL control information in the PSCCH is received from the second UE when the PSCCH indicates a subsequent data transmission over the SL from the second UE to the first UE
  • an apparatus configured for wireless communication includes means for receiving, by a first UE in communication with a second UE over an SL, a transmission grant from a base station serving the first UE and the second UE, and means for transmitting, by the first UE, SCI in a PSCCH to the second UE.
  • the second UE is operating in DRX mode, and the SCI in the PSCCH is received by the second UE during an active period of a DRX cycle of the second UE.
  • the SCI includes configuration for a subsequent data transmission from the first UE to the second UE over the SL.
  • transmitting the SCI in the PSCCH to the second UE causes the second UE to extend the active period of the DRX cycle of the second UE in which the SCI in the PSCCH is received when the PSCCH indicates the subsequent data transmission over the SL from the first UE to the second UE.
  • an apparatus configured for wireless communication includes means for transmitting, by a base station serving a first UE and a second UE, a transmission grant to the first UE, the first UE in communication with the second UE over an SL.
  • the second UE operating in DRX mode and the transmission grant causes the first UE to send SCI in a PSCCH to the second UE, the SCI including configuration for a subsequent data transmission from the first UE to the second UE over the SL.
  • the SCI in the PSCCH is received by the second UE during an active period of a DRX cycle of the second UE, and receiving the SCI in the PSCCH from the first UE causes the second UE to extend the active period of the DRX cycle of the second UE in which the SCI in the PSCCH is received when the PSCCH indicates the subsequent data transmission over the SL from the first UE to the second UE.
  • a non-transitory computer-readable medium having program code recorded thereon.
  • the program code further includes code to receive, by a first UE in communication with a second UE over an SL, SCI in a PSCCH from the second UE.
  • the first UE is operating in DRX mode
  • the PSCCH is received by the first UE during an active period of a DRX cycle of the first UE.
  • the program code further includes code to extend, in response to receiving the SL control information in the PSCCH from the second UE, the active period of the DRX cycle in which the SL control information in the PSCCH is received from the second UE when the PSCCH indicates a subsequent data transmission over the SL from the second UE to the first UE
  • a non-transitory computer-readable medium having program code recorded thereon.
  • the program code further includes code to receive, by a first UE in communication with a second UE over an SL, a transmission grant from a base station serving the first UE and the second UE, and to transmit, by the first UE, SCI in a PSCCH to the second UE.
  • the second UE is operating in DRX mode, and the SCI in the PSCCH is received by the second UE during an active period of a DRX cycle of the second UE.
  • the SCI includes configuration for a subsequent data transmission from the first UE to the second UE over the SL.
  • transmitting the SCI in the PSCCH to the second UE causes the second UE to extend the active period of the DRX cycle of the second UE in which the SCI in the PSCCH is received when the PSCCH indicates the subsequent data transmission over the SL from the first UE to the second UE.
  • a non-transitory computer-readable medium having program code recorded thereon.
  • the program code further includes code to transmit, by a base station serving a first UE and a second UE, a transmission grant to the first UE, the first UE in communication with the second UE over an SL.
  • the second UE operating in DRX mode and the transmission grant causes the first UE to send SCI in a PSCCH to the second UE, the SCI including configuration for a subsequent data transmission from the first UE to the second UE over the SL.
  • the SCI in the PSCCH is received by the second UE during an active period of a DRX cycle of the second UE, and receiving the SCI in the PSCCH from the first UE causes the second UE to extend the active period of the DRX cycle of the second UE in which the SCI in the PSCCH is received when the PSCCH indicates the subsequent data transmission over the SL from the first UE to the second UE.
  • an apparatus configured for wireless communication.
  • the apparatus includes at least one processor, and a memory coupled to the processor.
  • the processor is configured to receive, by a first UE in communication with a second UE over an SL, SCI in a PSCCH from the second UE.
  • the first UE is operating in DRX mode, and the PSCCH is received by the first UE during an active period of a DRX cycle of the first UE.
  • the processor is further configured to extend, in response to receiving the SL control information in the PSCCH from the second UE, the active period of the DRX cycle in which the SL control information in the PSCCH is received from the second UE when the PSCCH indicates a subsequent data transmission over the SL from the second UE to the first UE
  • an apparatus configured for wireless communication.
  • the apparatus includes at least one processor, and a memory coupled to the processor.
  • the processor is configured to receive, by a first UE in communication with a second UE over an SL, a transmission grant from a base station serving the first UE and the second UE, and to transmit, by the first UE, SCI in a PSCCH to the second UE.
  • the second UE is operating in DRX mode, and the SCI in the PSCCH is received by the second UE during an active period of a DRX cycle of the second UE.
  • the SCI includes configuration for a subsequent data transmission from the first UE to the second UE over the SL.
  • transmitting the SCI in the PSCCH to the second UE causes the second UE to extend the active period of the DRX cycle of the second UE in which the SCI in the PSCCH is received when the PSCCH indicates the subsequent data transmission over the SL from the first UE to the second UE.
  • an apparatus configured for wireless communication.
  • the apparatus includes at least one processor, and a memory coupled to the processor.
  • the processor is configured to transmit, by a base station serving a first UE and a second UE, a transmission grant to the first UE, the first UE in communication with the second UE over an SL.
  • the second UE operating in DRX mode and the transmission grant causes the first UE to send SCI in a PSCCH to the second UE, the SCI including configuration for a subsequent data transmission from the first UE to the second UE over the SL.
  • the SCI in the PSCCH is received by the second UE during an active period of a DRX cycle of the second UE, and receiving the SCI in the PSCCH from the first UE causes the second UE to extend the active period of the DRX cycle of the second UE in which the SCI in the PSCCH is received when the PSCCH indicates the subsequent data transmission over the SL from the first UE to the second UE.
  • a method of wireless communication includes sending, by a first UE in communication with a second UE over an SL, SL DRX configuration, the SL DRX configuration specifying an SL DRX mode of the first UE with respect to the SL.
  • the SL DRX mode of the first UE includes at least one SL DRX cycle with an active period for reception over the SL and an inactive period of reception over the SL.
  • the method also includes receiving, by the first UE, SL control information (SCI) in a physical SL control channel (PSCCH) from the second UE.
  • SCI SL control information
  • PSCCH physical SL control channel
  • the SCI in the PSCCH is received by the first UE during the active period of the at least one SL DRX cycle of the first UE.
  • the method further includes extending, in response to receiving the SCI in the PSCCH from the second UE, the active period of the at least one SL DRX cycle in which the SCI in the PSCCH is received from the second UE when the SCI in the PSCCH indicates a subsequent data transmission over the SL from the second UE to the first UE.
  • a method of wireless communication includes receiving, by a first UE in communication with a second UE over an SL, SL DRX configuration, the SL DRX configuration specifying an SL DRX mode of the second UE with respect to the SL.
  • the SL DRX mode of the second UE includes at least one SL DRX cycle with an active period for reception over the SL and an inactive period of reception over the SL.
  • the method further includes transmitting, by the first UE, SCI in a PSCCH to the second UE.
  • the SCI in the PSCCH is received by the second UE during the active period of the at least one SL DRX cycle of the second UE, and transmitting the SCI in the PSCCH to the second UE causes the second UE to extend, in response to receiving the SCI in the PSCCH from the first UE, the active period of the at least one SL DRX cycle in which the SCI in the PSCCH is received from the first UE when the SCI in the PSCCH indicates a subsequent data transmission over the SL from the first UE to the second UE.
  • an apparatus for wireless communication includes means for sending, by a first UE in communication with a second UE over an SL, SL DRX configuration, the SL DRX configuration specifying an SL DRX mode of the first UE with respect to the SL.
  • the SL DRX mode of the first UE includes at least one SL DRX cycle with an active period for reception over the SL and an inactive period of reception over the SL.
  • the apparatus also includes means for receiving, by the first UE, SCI in a PSCCH from the second UE.
  • the SCI in the PSCCH is received by the first UE during the active period of the at least one SL DRX cycle of the first UE.
  • the apparatus also includes means for extending, in response to receiving the SCI in the PSCCH from the second UE, the active period of the at least one SL DRX cycle in which the SCI in the PSCCH is received from the second UE when the SCI in the PSCCH indicates a subsequent data transmission over the SL from the second UE to the first UE.
  • an apparatus for wireless communication includes means for receiving, by a first UE in communication with a second UE over an SL, SL DRX configuration, the SL DRX configuration specifying an SL DRX mode of the second UE with respect to the SL.
  • the SL DRX mode of the second UE includes at least one SL DRX cycle with an active period for reception over the SL and an inactive period of reception over the SL.
  • the apparatus further includes means for transmitting, by the first UE, SCI in a PSCCH to the second UE.
  • the SCI in the PSCCH is received by the second UE during the active period of the at least one SL DRX cycle of the second UE, and transmitting the SCI in the PSCCH to the second UE causes the second UE to extend, in response to receiving the SCI in the PSCCH from the first UE, the active period of the at least one SL DRX cycle in which the SCI in the PSCCH is received from the first UE when the SCI in the PSCCH indicates a subsequent data transmission over the SL from the first UE to the second UE.
  • a non-transitory computer-readable medium having program code recorded thereon.
  • the program code includes code to send, by a first UE in communication with a second UE over an SL, SL DRX configuration, the SL DRX configuration specifying an SL DRX mode of the first UE with respect to the SL.
  • the SL DRX mode of the first UE includes at least one SL DRX cycle with an active period for reception over the SL and an inactive period of reception over the SL.
  • the program code further includes code to receive, by the first UE, SCI in a PSCCH from the second UE.
  • the SCI in the PSCCH is received by the first UE during the active period of the at least one SL DRX cycle of the first UE.
  • the program code further includes code to extend, in response to receiving the SCI in the PSCCH from the second UE, the active period of the at least one SL DRX cycle in which the SCI in the PSCCH is received from the second UE when the SCI in the PSCCH indicates a subsequent data transmission over the SL from the second UE to the first UE.
  • a non-transitory computer-readable medium having program code recorded thereon.
  • the program code includes code to receive, by a first UE in communication with a second UE over an SL, SL DRX configuration, the SL DRX configuration specifying an SL DRX mode of the second UE with respect to the SL.
  • the SL DRX mode of the second UE includes at least one SL DRX cycle with an active period for reception over the SL and an inactive period of reception over the SL.
  • the program code further includes code to transmit, by the first UE, SCI in a PSCCH to the second UE.
  • the SCI in the PSCCH is received by the second UE during the active period of the at least one SL DRX cycle of the second UE, and transmitting the SCI in the PSCCH to the second UE causes the second UE to extend, in response to receiving the SCI in the PSCCH from the first UE, the active period of the at least one SL DRX cycle in which the SCI in the PSCCH is received from the first UE when the SCI in the PSCCH indicates a subsequent data transmission over the SL from the first UE to the second UE.
  • an apparatus configured for wireless communication.
  • the apparatus includes at least one processor, and a memory coupled to the processor.
  • the processor is configured to send, by a first UE in communication with a second UE over an SL, SL DRX configuration, the SL DRX configuration specifying an SL DRX mode of the first UE with respect to the SL.
  • the SL DRX mode of the first UE includes at least one SL DRX cycle with an active period for reception over the SL and an inactive period of reception over the SL.
  • the processor is further configured to receive, by the first UE, SCI in a PSCCH from the second UE.
  • the SCI in the PSCCH is received by the first UE during the active period of the at least one SL DRX cycle of the first UE.
  • the processor is further configured to extend, in response to receiving the SCI in the PSCCH from the second UE, the active period of the at least one SL DRX cycle in which the SCI in the PSCCH is received from the second UE when the SCI in the PSCCH indicates a subsequent data transmission over the SL from the second UE to the first UE.
  • an apparatus configured for wireless communication.
  • the apparatus includes at least one processor, and a memory coupled to the processor.
  • the processor is configured to receive, by a first UE in communication with a second UE over an SL, SL DRX configuration, the SL DRX configuration specifying an SL DRX mode of the second UE with respect to the SL.
  • the SL DRX mode of the second UE includes at least one SL DRX cycle with an active period for reception over the SL and an inactive period of reception over the SL.
  • the processor is further configured to transmit, by the first UE, SCI in a PSCCH to the second UE.
  • the SCI in the PSCCH is received by the second UE during the active period of the at least one SL DRX cycle of the second UE, and transmitting the SCI in the PSCCH to the second UE causes the second UE to extend, in response to receiving the SCI in the PSCCH from the first UE, the active period of the at least one SL DRX cycle in which the SCI in the PSCCH is received from the first UE when the SCI in the PSCCH indicates a subsequent data transmission over the SL from the first UE to the second UE.
  • FIG. 1 is a block diagram illustrating details of a wireless communication system according to some aspects of the present disclosure.
  • FIG. 2 is a block diagram conceptually illustrating a design of a base station and a UE configured according to some aspects of the present disclosure.
  • FIG. 3 is a block diagram is a block diagram illustrating details of an example wireless communication system implementing a sidelink communication scheme.
  • FIG. 4 is a diagram illustrating operations in DRX mode 1.
  • FIG. 5 is a diagram illustrating DRX in SL mode 1 operations implemented in accordance with some aspects of the present disclosure.
  • FIG. 6 is a block diagram illustrating example blocks executed by a user equipment to implement aspects of the present disclosure.
  • FIG. 7 is a block diagram illustrating example blocks executed by a user equipment to implement aspects of the present disclosure.
  • FIG. 8 is a block diagram illustrating example blocks executed by a base station to implement aspects of the present disclosure.
  • FIG. 9 is a block diagram conceptually illustrating a design of a user equipment configured according to some embodiments of the present disclosure.
  • FIG. 10 is a block diagram conceptually illustrating a design of a base station configured according to some embodiments of the present disclosure.
  • FIG. 11 is a diagram illustrating DRX in SL mode 2 operations implemented in accordance with some aspects of the present disclosure.
  • FIG. 12 is a block diagram illustrating example blocks executed by a user equipment to implement aspects of the present disclosure.
  • FIG. 13 is a block diagram illustrating example blocks executed by a user equipment to implement aspects of the present disclosure.
  • This disclosure relates generally to providing or participating in authorized shared access between two or more wireless devices in one or more wireless communications systems, also referred to as wireless communications networks.
  • the techniques and apparatus may be used for wireless communication networks such as code division multiple access (CDMA) networks, time division multiple access (TDMA) networks, frequency division multiple access (FDMA) networks, orthogonal FDMA (OFDMA) networks, single-carrier FDMA (SC-FDMA) networks, LTE networks, GSM networks, 5 th Generation (5G) or new radio (NR) networks (sometimes referred to as “5G NR” networks/systems/devices), as well as other communications networks.
  • CDMA code division multiple access
  • TDMA time division multiple access
  • FDMA frequency division multiple access
  • OFDMA orthogonal FDMA
  • SC-FDMA single-carrier FDMA
  • LTE long-term evolution
  • GSM Global System for Mobile communications
  • 5G 5 th Generation
  • NR new radio
  • a CDMA network may implement a radio technology such as universal terrestrial radio access (UTRA), cdma2000, and the like.
  • UTRA includes wideband- CDMA (W-CDMA) and low chip rate (LCR).
  • CDMA2000 covers IS-2000, IS-95, and IS-856 standards.
  • a TDMA network may, for example implement a radio technology such as Global System for Mobile Communication (GSM).
  • GSM Global System for Mobile Communication
  • 3 GPP defines standards for the GSM EDGE (enhanced data rates for GSM evolution) radio access network (RAN), also denoted as GERAN.
  • GERAN is the radio component of GSMZEDGE, together with the network that joins the base stations (for example, the Ater and Abis interfaces) and the base station controllers (A interfaces, etc.).
  • the radio access network represents a component of a GSM network, through which phone calls and packet data are routed from and to the public switched telephone network (PSTN) and Internet to and from subscriber handsets, also known as user terminals or user equipments (UEs).
  • PSTN public switched telephone network
  • UEs subscriber handsets
  • a mobile phone operator's network may comprise one or more GERANs, which may be coupled with Universal Terrestrial Radio Access Networks (UTRANs) in the case of a UMTS/GSM network. Additionally, an operator network may also include one or more LTE networks, and/or one or more other networks. The various different network types may use different radio access technologies (RATs) and radio access networks (RANs).
  • RATs radio access technologies
  • RANs radio access networks
  • An OFDMA network may implement a radio technology such as evolved UTRA (E- UTRA), IEEE 802.11, IEEE 802.16, IEEE 802.20, flash-OFDM and the like.
  • E- UTRA evolved UTRA
  • GSM Global System for Mobile Communications
  • LTE long term evolution
  • UTRA, E-UTRA, GSM, UMTS and LTE are described in documents provided from an organization named “3rd Generation Partnership Project” (3GPP), and cdma2000 is described in documents from an organization named “3rd Generation Partnership Project 2” (3GPP2).
  • the 3GPP is a collaboration between groups of telecommunications associations that aims to define a globally applicable third generation (3G) mobile phone specification.
  • 3 GPP long term evolution (LTE) is a 3GPP project which was aimed at improving the universal mobile telecommunications system (UMTS) mobile phone standard.
  • the 3 GPP may define specifications for the next generation of mobile networks, mobile systems, and mobile devices.
  • LTE long term evolution
  • UMTS universal mobile telecommunications system
  • the present disclosure may describe certain aspects with reference to LTE, 4G, or 5G NR technologies; however, the description is not intended to be limited to a specific technology or application, and one or more aspects described with reference to one technology may be understood to be applicable to another technology. Indeed, one or more aspects of the present disclosure are related to shared access to wireless spectrum between networks using different radio access technologies or radio air interfaces.
  • 5G networks contemplate diverse deployments, diverse spectrum, and diverse services and devices that may be implemented using an OFDM-based unified, air interface. To achieve these goals, further enhancements to LTE and LTE-A are considered in addition to development of the new radio technology for 5G NR networks.
  • the 5G NR will be capable of scaling to provide coverage (1) to a massive Internet of things (loTs) with an ultra-high density (e.g., ⁇ 1M nodes/km 2 ), ultra-low complexity (e.g., ⁇ 10s of bits/sec), ultra-low energy (e.g., -10+ years of battery life), and deep coverage with the capability to reach challenging locations; (2) including mission-critical control with strong security to safeguard sensitive personal, financial, or classified information, ultra-high reliability (e.g., -99.9999% reliability), ultra-low latency (e.g., - 1 millisecond (ms)), and users with wide ranges of mobility or lack thereof; and (3) with enhanced mobile broadband including extreme high capacity (e.g., - 10 Tbps/km 2 ), extreme data rates (e.g., multi - Gbps rate, 100+ Mbps user experienced rates), and deep awareness with advanced discovery and optimizations.
  • ultra-high density e.g., ⁇ 1M nodes/km 2
  • 5G NR devices, networks, and systems may be implemented to use optimized OFDMbased waveform features. These features may include scalable numerology and transmission time intervals (TTIs); a common, flexible framework to efficiently multiplex services and features with a dynamic, low-latency time division duplex (TDD)/frequency division duplex (FDD) design; and advanced wireless technologies, such as massive multiple input, multiple output (MIMO), robust millimeter wave (mmWave) transmissions, advanced channel coding, and device-centric mobility. Scalability of the numerology in 5G NR, with scaling of subcarrier spacing, may efficiently address operating diverse services across diverse spectrum and diverse deployments.
  • TTIs transmission time intervals
  • TDD dynamic, low-latency time division duplex
  • FDD frequency division duplex
  • MIMO massive multiple input, multiple output
  • mmWave millimeter wave
  • Scalability of the numerology in 5G NR with scaling of subcarrier spacing, may efficiently address operating diverse services across diverse spectrum and diverse deployments.
  • subcarrier spacing may occur with 15 kHz, for example over 1, 5, 10, 20 MHz, and the like bandwidth.
  • subcarrier spacing may occur with 30 kHz over 80/100 MHz bandwidth.
  • the subcarrier spacing may occur with 60 kHz over a 160 MHz bandwidth.
  • subcarrier spacing may occur with 120 kHz over a 500MHz bandwidth.
  • the scalable numerology of 5G NR facilitates scalable TTI for diverse latency and quality of service (QoS) requirements. For example, shorter TTI may be used for low latency and high reliability, while longer TTI may be used for higher spectral efficiency.
  • QoS quality of service
  • 5G NR also contemplates a self-contained integrated subframe design with uplink/downlink scheduling information, data, and acknowledgement in the same subframe.
  • the self-contained integrated subframe supports communications in unlicensed or contention-based shared spectrum, adaptive uplink/downlink that may be flexibly configured on a per-cell basis to dynamically switch between uplink and downlink to meet the current traffic needs.
  • wireless communication networks adapted according to the concepts herein may operate with any combination of licensed or unlicensed spectrum depending on loading and availability. Accordingly, it will be apparent to a person having ordinary skill in the art that the systems, apparatus and methods described herein may be applied to other communications systems and applications than the particular examples provided.
  • Implementations may range from chip-level or modular components to non-modular, non-chip-level implementations and further to aggregated, distributed, or OEM devices or systems incorporating one or more described aspects.
  • devices incorporating described aspects and features may also necessarily include additional components and features for implementation and practice of claimed and described embodiments. It is intended that innovations described herein may be practiced in a wide variety of implementations, including both large/small devices, chip-level components, multi-component systems (e.g. RF-chain, communication interface, processor), distributed arrangements, end-user devices, etc. of varying sizes, shapes, and constitution.
  • FIG. 1 is a block diagram illustrating details of an example wireless communication system.
  • the wireless communication system may include wireless network 100.
  • Wireless network 100 may, for example, include a 5G wireless network.
  • components appearing in FIG. 1 are likely to have related counterparts in other network arrangements including, for example, cellular-style network arrangements and non-cellular-style-network arrangements (e.g., device to device or peer to peer or ad hoc network arrangements, etc.).
  • Wireless network 100 illustrated in FIG. 1 includes a number of base stations 105 and other network entities.
  • a base station may be a station that communicates with the UEs and may also be referred to as an evolved node B (eNB), a next generation eNB (gNB), an access point, and the like.
  • eNB evolved node B
  • gNB next generation eNB
  • Each base station 105 may provide communication coverage for a particular geographic area.
  • the term “cell” may refer to this particular geographic coverage area of a base station and/or a base station subsystem serving the coverage area, depending on the context in which the term is used.
  • base stations 105 may be associated with a same operator or different operators (e.g., wireless network 100 may include a plurality of operator wireless networks).
  • base station 105 may provide wireless communications using one or more of the same frequencies (e.g., one or more frequency bands in licensed spectrum, unlicensed spectrum, or a combination thereof) as a neighboring cell.
  • an individual base station 105 or UE 115 may be operated by more than one network operating entity.
  • each base station 105 and UE 115 may be operated by a single network operating entity.
  • a base station may provide communication coverage for a macro cell or a small cell, such as a pico cell or a femto cell, and/or other types of cell.
  • a macro cell generally covers a relatively large geographic area (e.g., several kilometers in radius) and may allow unrestricted access by UEs with service subscriptions with the network provider.
  • a small cell such as a pico cell, would generally cover a relatively smaller geographic area and may allow unrestricted access by UEs with service subscriptions with the network provider.
  • a small cell such as a femto cell, would also generally cover a relatively small geographic area (e.g., a home) and, in addition to unrestricted access, may also provide restricted access by UEs having an association with the femto cell (e.g., UEs in a closed subscriber group (CSG), UEs for users in the home, and the like).
  • CSG closed subscriber group
  • a base station for a macro cell may be referred to as a macro base station.
  • a base station for a small cell may be referred to as a small cell base station, a pico base station, a femto base station or a home base station.
  • base stations 105d and 105e are regular macro base stations
  • base stations 105a- 105c are macro base stations enabled with one of 3 dimension (3D), full dimension (FD), or massive MIMO.
  • Base stations 105a-105c take advantage of their higher dimension MIMO capabilities to exploit 3D beamforming in both elevation and azimuth beamforming to increase coverage and capacity.
  • Base station 105f is a small cell base station which may be a home node or portable access point.
  • a base station may support one or multiple (e.g., two, three, four, and the like) cells.
  • Wireless network 100 may support synchronous or asynchronous operation.
  • the base stations may have similar frame timing, and transmissions from different base stations may be approximately aligned in time.
  • the base stations may have different frame timing, and transmissions from different base stations may not be aligned in time.
  • networks may be enabled or configured to handle dynamic switching between synchronous or asynchronous operations.
  • UEs 115 are dispersed throughout the wireless network 100, and each UE may be stationary or mobile.
  • a mobile apparatus is commonly referred to as user equipment (UE) in standards and specifications promulgated by the 3GPP, such apparatus may additionally or otherwise be referred to by those skilled in the art as a mobile station (MS), a subscriber station, a mobile unit, a subscriber unit, a wireless unit, a remote unit, a mobile device, a wireless device, a wireless communications device, a remote device, a mobile subscriber station, an access terminal (AT), a mobile terminal, a wireless terminal, a remote terminal, a handset, a terminal, a user agent, a mobile client, a client, a gaming device, an augmented reality device, vehicular component device/module, or some other suitable terminology.
  • a “mobile” apparatus or UE need not necessarily have a capability to move, and may be stationary.
  • Some non-limiting examples of a mobile apparatus such as may include implementations of one or more of UEs 115, include a mobile, a cellular (cell) phone, a smart phone, a session initiation protocol (SIP) phone, a wireless local loop (WLL) station, a laptop, a personal computer (PC), a notebook, a netbook, a smart book, a tablet, and a personal digital assistant (PDA).
  • a mobile a cellular (cell) phone, a smart phone, a session initiation protocol (SIP) phone, a wireless local loop (WLL) station, a laptop, a personal computer (PC), a notebook, a netbook, a smart book, a tablet, and a personal digital assistant (PDA).
  • PDA personal digital assistant
  • a mobile apparatus may additionally be an “Internet of things” (loT) or “Internet of everything” (loE) device such as an automotive or other transportation vehicle, a satellite radio, a global positioning system (GPS) device, a logistics controller, a drone, a multi-copter, a quad-copter, a smart energy or security device, a solar panel or solar array, municipal lighting, water, or other infrastructure; industrial automation and enterprise devices; consumer and wearable devices, such as eyewear, a wearable camera, a smart watch, a health or fitness tracker, a mammal implantable device, gesture tracking device, medical device, a digital audio player (e.g., MP3 player), a camera, a game console, etc.; and digital home or smart home devices such as a home audio, video, and multimedia device, an appliance, a sensor, a vending machine, intelligent lighting, a home security system, a smart meter, etc.
  • IVS global positioning system
  • a UE may be a device that includes a Universal Integrated Circuit Card (UICC).
  • a UE may be a device that does not include a UICC.
  • UEs that do not include UICCs may also be referred to as loE devices.
  • UEs 115a-l 15d of the implementation illustrated in FIG. 1 are examples of mobile smart phone-type devices accessing wireless network 100
  • a UE may also be a machine specifically configured for connected communication, including machine type communication (MTC), enhanced MTC (eMTC), narrowband loT (NB-IoT) and the like.
  • UEs 115e-l 15k illustrated in FIG. 1 are examples of various machines configured for communication that access wireless network 100.
  • a mobile apparatus such as UEs 115, may be able to communicate with any type of the base stations, whether macro base stations, pico base stations, femto base stations, relays, and the like.
  • a communication link (represented as a lightning bolt) indicates wireless transmissions between a UE and a serving base station, which is a base station designated to serve the UE on the downlink and/or uplink, or desired transmission between base stations, and backhaul transmissions between base stations.
  • UEs may operate as base stations or other network nodes in some scenarios.
  • Backhaul communication between base stations of wireless network 100 may occur using wired and/or wireless communication links.
  • base stations 105a-105c serve UEs 115a and 115b using 3D beamforming and coordinated spatial techniques, such as coordinated multipoint (CoMP) or multi-connectivity.
  • Macro base station 105d performs backhaul communications with base stations 105a- 105c, as well as small cell, base station 105f.
  • Macro base station 105d also transmits multicast services which are subscribed to and received by UEs 115c and 115d.
  • Such multicast services may include mobile television or stream video, or may include other services for providing community information, such as weather emergencies or alerts, such as Amber alerts or gray alerts.
  • Wireless network 100 of implementations supports mission critical communications with ultra-reliable and redundant links for mission critical devices, such UE 115e, which is a drone. Redundant communication links with UE 115e include from macro base stations 105d and 105e, as well as small cell base station 105f.
  • UE 115f thermometer
  • UE 115g smart meter
  • UE 115h wearable device
  • wireless network 100 may also provide additional network efficiency through dynamic, low-latency TDD/FDD communications, such as in a vehicle-to-vehicle (V2V) mesh network between UEs 115i- 115k communicating with macro base station 105e.
  • V2V vehicle-to-vehicle
  • FIG. 2 shows a block diagram conceptually illustrating an example design of a base station 105 and a UE 115, which may be any of the base stations and one of the UEs in FIG. 1.
  • base station 105 may be small cell base station 105f in FIG. 1
  • UE 115 may be UE 115c or 115D operating in a service area of base station 105f, which in order to access small cell base station 105f, would be included in a list of accessible UEs for small cell base station 105f.
  • Base station 105 may also be a base station of some other type. As shown in FIG. 2, base station 105 may be equipped with antennas 234a through 234t, and UE 115 may be equipped with antennas 252a through 252r for facilitating wireless communications.
  • transmit processor 220 may receive data from data source 212 and control information from controller/processor 240.
  • the control information may be for the physical broadcast channel (PBCH), physical control format indicator channel (PCFICH), physical hybrid-ARQ (automatic repeat request) indicator channel (PHICH), physical downlink control channel (PDCCH), enhanced physical downlink control channel (EPDCCH), MTC physical downlink control channel (MPDCCH), etc.
  • the data may be for the PDSCH, etc.
  • transmit processor 220 may process (e.g., encode and symbol map) the data and control information to obtain data symbols and control symbols, respectively.
  • Transmit processor 220 may also generate reference symbols, e.g., for the primary synchronization signal (PSS) and secondary synchronization signal (SSS), and cell-specific reference signal.
  • Transmit (TX) multipleinput multiple-output (MIMO) processor 230 may perform spatial processing (e.g., precoding) on the data symbols, the control symbols, and/or the reference symbols, if applicable, and may provide output symbol streams to modulators (MODs) 232a through 232t.
  • MIMO multipleinput multiple-output
  • MIMO multipleinput multiple-output
  • Each modulator 232 may process a respective output symbol stream (e.g., for OFDM, etc.) to obtain an output sample stream.
  • Each modulator 232 may additionally or alternatively process (e.g., convert to analog, amplify, filter, and upconvert) the output sample stream to obtain a downlink signal.
  • Downlink signals from modulators 232a through 232t may be transmitted via antennas 234a through 234t, respectively.
  • the antennas 252a through 252r may receive the downlink signals from base station 105 and may provide received signals to demodulators (DEMODs) 254a through 254r, respectively.
  • Each demodulator 254 may condition (e.g., filter, amplify, downconvert, and digitize) a respective 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 demodulators 254a through 254r, perform MIMO detection on the received symbols if applicable, and provide detected symbols.
  • Receive processor 258 may process (e.g., demodulate, deinterleave, and decode) the detected symbols, provide decoded data for UE 115 to data sink 260, and provide decoded control information to controller/processor 280.
  • transmit processor 264 may receive and process data (e.g., for the physical uplink shared channel (PUSCH)) from data source 262 and control information (e.g., for the physical uplink control channel (PUCCH)) from controller/processor 280. Additionally, transmit processor 264 may also generate reference symbols for a reference signal.
  • PUSCH physical uplink shared channel
  • PUCCH physical uplink control channel
  • the symbols from transmit processor 264 may be precoded by TX MIMO processor 266 if applicable, further processed by modulators 254a through 254r (e.g., for SC-FDM, etc.), and transmitted to base station 105.
  • the uplink signals from UE 115 may be received by antennas 234, processed by demodulators 232, detected by MIMO detector 236 if applicable, and further processed by receive processor 238 to obtain decoded data and control information sent by UE 115.
  • Receive processor 238 may provide the decoded data to data sink 239 and the decoded control information to controller/processor 240.
  • Controllers/processors 240 and 280 may direct the operation at base station 105 and UE 115, respectively. Controller/processor 240 and/or other processors and modules at base station 105 and/or controller/processor 280 and/or other processors and modules at UE 115 may perform or direct the execution of various processes for the techniques described herein, such as to perform or direct the execution illustrated in FIGS. 6-8, and/or other processes for the techniques described herein.
  • Memories 242 and 282 may store data and program codes for base station 105 and UE 115, respectively.
  • Scheduler 244 may schedule UEs for data transmission on the downlink and/or uplink.
  • Wireless communications systems operated by different network operating entities may share spectrum.
  • a network operating entity may be configured to use an entirety of a designated shared spectrum for at least a period of time before another network operating entity uses the entirety of the designated shared spectrum for a different period of time.
  • certain resources e.g., time
  • a network operating entity may be allocated certain time resources reserved for exclusive communication by the network operating entity using the entirety of the shared spectrum.
  • the network operating entity may also be allocated other time resources where the entity is given priority over other network operating entities to communicate using the shared spectrum.
  • These time resources, prioritized for use by the network operating entity may be utilized by other network operating entities on an opportunistic basis if the prioritized network operating entity does not utilize the resources. Additional time resources may be allocated for any network operator to use on an opportunistic basis.
  • Access to the shared spectrum and the arbitration of time resources among different network operating entities may be centrally controlled by a separate entity, autonomously determined by a predefined arbitration scheme, or dynamically determined based on interactions between wireless nodes of the network operators.
  • UE 115 and base station 105 may operate in a shared radio frequency spectrum band, which may include licensed or unlicensed (e.g., contention-based) frequency spectrum. In an unlicensed frequency portion of the shared radio frequency spectrum band, UEs 115 or base stations 105 may traditionally perform a medium-sensing procedure to contend for access to the frequency spectrum. For example, UE 115 or base station 105 may perform a listen-before-talk or listen-before-transmitting (LBT) procedure such as a clear channel assessment (CCA) prior to communicating in order to determine whether the shared channel is available.
  • LBT listen-before-talk or listen-before-transmitting
  • CCA clear channel assessment
  • a CCA may include an energy detection procedure to determine whether there are any other active transmissions.
  • a device may infer that a change in a received signal strength indicator (RSSI) of a power meter indicates that a channel is occupied.
  • RSSI received signal strength indicator
  • a CCA also may include detection of specific sequences that indicate use of the channel.
  • another device may transmit a specific preamble prior to transmitting a data sequence.
  • an LBT procedure may include a wireless node adjusting its own backoff window based on the amount of energy detected on a channel and/or the acknowledge/negative-acknowledge (ACK/NACK) feedback for its own transmitted packets as a proxy for collisions.
  • ACK/NACK acknowledge/negative-acknowledge
  • FIG. 3 is a block diagram illustrating details of an example wireless communication system.
  • the wireless communication system may include an implementation of wireless network 100.
  • Wireless network 100 may include base station 105z, UE 115x, and UE 115y. It will be appreciated that network 100 may include further components such as additional base station and additional UEs. Thus, the discussion with respect to base station 105z, UE 115x, and UE 115y of FIG. 3 is by way of example, and not intended to be limiting in any way.
  • UE 115x and UE 115y may be in communication with base station 105z.
  • UE 115x may communicate with base station 105z via link 352.
  • Link 352 may include an uplink and/or a downlink.
  • UE 115y may communicate with base station 105z via link 351.
  • Link 351 may include an uplink and/or a downlink.
  • base station 105z may be a serving base station to one or both of UE 115x and UE 115y.
  • UE 115x and UE 115y may be in communication with each other via SL 350.
  • SL 350 may be a direct link via which UE 115x sends/receives messages directly to/from UE 115y, and via which UE 115y sends/receives messages directly to/from UE 115x.
  • UE 115x and UE 115y may be configured to follow an SL communication scheme in which transmission/reception takes place only in designated resources (e.g., time, frequency, etc.). As such, SL communications between UE 115x and UE 115y may be restricted to particular resources, and in these implementations no SL communications between UE 115x and UE 115y may take place outside these resources.
  • SL communications between UE 115x and UE 115y may operate in one of various modes.
  • SL communications between UE 115x and UE 115y over SL 350 may operate in SL mode 1.
  • SL mode 1 a base station
  • a UE may transmit to another UE over the SL, but the transmitting UE must obtain a transmission grant from the serving base station before it is allowed to transmit to the receiving UE over the SL.
  • the transmitting UE is not allowed to transmit to the receiving UE over the SL.
  • UE 115x may wish to transmit to UE 115y over SL 350.
  • UE 115x may transmit a request for a transmission grant to base station 105z.
  • the request for the transmission grant may be sent over an uplink from UE 115x to base station 105z.
  • UE 115x may transmit to UE 115y over SL 350.
  • the transmission grant may be sent over a downlink (e.g., in a downlink control information (DCI) message) from base station 105z to UE 115x.
  • the transmission grant may be provided in a DCI message that includes a resource allocation to the transmitting UE.
  • the transmission grant may be provided in a DCI message that includes a resource allocation to the transmitting UE.
  • the transmission grant from base station 105z may include an indication to the transmitting UE of which resource to use to transmit the SL transmission to the receiving UE over the SL.
  • the transmission grant sent by base station 105z to UE 115x may include an indication of which resources UE 115x is to use in transmitting to UE 115y.
  • SL communications between UE 115x and UE 115y over SL 350 may operate in SL mode 2.
  • a UE e.g., UE115x and/or UE 115y
  • a UE may transmit to another UE over the SL, without the transmitting UE obtaining a transmission grant from the serving base station before it is allowed to transmit to the receiving UE over the SL.
  • UE 115x may wish to transmit to UE 115y over SL 350.
  • UE 115x may schedule the SL transmission to UE 115y and does not need to request a transmission grant from base station 105z, or another base station.
  • the transmitting UE in mode 1, the transmitting UE must obtain a transmission grant from a serving base station before transmitting to another UE over an SL.
  • the SL transmission may follow a particular scheme. For example, once the transmission grant is received by UE 115x, UE 115x may transmit SL control information (SCI) to UE 115y (e.g., using the resources specified in the transmission grant).
  • the SCI may be transmitted over a physical SL control channel (PSCCH) from UE 115x to UE 115y.
  • PSCCH physical SL control channel
  • the SCI may be configured to indicate to UE 115y that UE 115x is to transmit a subsequent data transmission to the UE 115y (e.g., a data transmission over SL 350 from UE 115x that is subsequent to the transmission of the SCI from UE 115x).
  • the subsequent data transmission may be a data transmission over a physical SL shared channel (PSSCH) from UE 115x to UE 115y.
  • the SCI may include an indication of which resources UE 115x is to use to transmit the subsequent data transmission (e.g., over the PSSCH), as well as other transmission parameters.
  • UE 115x may transmit the subsequent data transmission over the PSSCH using the resources specified in the SCI.
  • UE 115x may, after receiving the PSSCH transmission, provide feedback (e.g., over a physical SL feedback channel (PSFCH)).
  • PSFCH physical SL feedback channel
  • the receiving UE may operate in discontinuous reception (DRX) mode.
  • FIG. 4 is a diagram illustrating UE operations in DRX mode.
  • UE 115y may discontinuously monitor for transmissions from base station 105z (e.g., transmissions of control information such as DCI over a PDCCH).
  • UE 115y may monitor for DCI during active periods, but may not monitor for DCI outside of active periods (e.g., during inactive periods).
  • UE 115y may be configured to include one or more DRX cycles (e.g., 450-452).
  • the DRX cycles of the UE 115y may include active periods and inactive periods.
  • DRX cycles 450-452 may include active periods 400- 402, respectively.
  • UE 115y may monitor for control information from base station 105z only during active periods 400-402.
  • each DRX cycle of UE 115y begins with an active period during which UE 115y monitors for DCI transmissions from base station 105z.
  • DRX cycle 450 begins with active period 400
  • DRX cycle 451 begins with active period 401
  • DRX cycle 452 begins with active period 402.
  • a base station wishing to transmit data to a DRX UE may first send a wakeup signal (WUS) to the DRX UE to ensure that the UE is “awake” during the next active period to ensure that any transmission (e.g., DCI transmission) is detected and received by the DRX UE during the next active period.
  • WUS wakeup signal
  • UE 115y may monitor for a WUS even during inactive periods.
  • base station 105z may transmit WUS 410 to UE 115y during the inactivity period of DRX cycle 450.
  • UE 115y may monitor for a DCI transmission (e.g., over a PDCCH) from base station 105z during active period 401 of DRX cycle 451. In some cases, UE 115y may power up its transceiver and/or any other component in order to receive the DCI transmission. In some implementations, where a WUS is not received, UE 115y may not be configured or DCI reception even during a period of activity.
  • a DCI transmission e.g., over a PDCCH
  • PDCCH Physical Downlink Control Channel
  • the active period in which the PDCCH including the DCI is received is extended.
  • the active period is extended by starting and/or restarting an inactivity timer associated with the DRX cycle in which the PDCCH is received. For example, as shown in FIG. 4, in response to UE 115y receiving DCI over PDCCH 430, active period 401 may be extended by extension period 420 after the end of the PDCCH reception.
  • Various aspects of the present disclosure are directed to systems and methods for configuring and providing sidelink DRX communications.
  • the techniques disclosed herein may be applicable to sidelink operations in mode 1 and/or mode 2.
  • aspects of the present disclosure provide for a UE operating in SL mode 1 to implement a DRX scheme in which the UE operating in SL mode 1 is able to provide DRX communications with a serving base station, while concurrently maintaining DRX communications over an SL with another UE.
  • the DRX scheme between the DRX UE and the base station may be extended to receptions from the transmitting UE over the SL.
  • a DRX UE may monitor for either one or both of transmissions in a DL (e.g., from a base station) and in an SL (e.g., from a transmitting SL UE), and may extend the active period (e.g., by starting/restarting an inactivity timer as described above) based on events on both the link with the base station or the SL with another UE.
  • the DRX UE may be configured to start or restart the inactivity timer (e.g., based on a drx-InactivityTimer parameter) in the first symbol after the end of a PDCCH reception when the PDCCH indicates a subsequent transmission (either a downlink transmission or an uplink transmission), or in the first symbol after the end of a PSCCH reception when the PSCCH indicates a subsequent SL transmission.
  • the described techniques may be referred to as DRX with SL in mode 1.
  • aspects of the present disclosure provide for a UE operating in SL mode 2 to implement a DRX scheme in which the UE is able to provide DRX communications with a serving base station, while concurrently maintaining DRX communications over an SL with another UE, while in SL mode 2.
  • an SL DRX scheme for communications between the DRX UE and other UEs over an SL may be provided in addition to a Uu DRX scheme between the DRX UE and a base station.
  • a DRX UE may monitor the SL for transmissions from other UEs using the SL DRX configuration, and may concurrently monitor for transmissions in a DL (e.g., from a base station) using a Uu DRX configuration, where the SL DRX configuration and the Uu DRX configuration may be different.
  • an active period of an SL DRX cycle e.g., a DRX cycle of the SL DRX configuration for the SL between the DRX UE and another UE
  • an active period of a Uu DRX cycle (e.g., a DRX cycle of the Uu DRX configuration for the link between the base station and the DRX UE) may be extended (e.g., by starting/restarting an inactivity timer) based on events on the link between the base station and the DRX UE.
  • the DRX UE may be configured to start or restart an inactivity timer of an SL DRX cycle in the first symbol after the end of a control channel (e.g., a physical SL control channel (PSCCH)) reception when the PSCCH indicates a subsequent SL transmission from another UE.
  • a control channel e.g., a physical SL control channel (PSCCH)
  • the DRX UE may be configured to start or restart an inactivity timer of an Uu DRX cycle in the first symbol after the end of a control channel (e.g., a PDCCH)) reception when the PDCCH indicates a subsequent transmission (either a downlink transmission or an uplink transmission) from a base station.
  • a control channel e.g., a physical SL control channel (PSCCH)
  • the DRX UE may be configured to start or restart an inactivity timer of an Uu DRX cycle in the first symbol after the end of a control channel (e.g.,
  • FIG. 5 is a diagram illustrating an example implementation of an SL DRX process to implement one aspect of the present disclosure.
  • base station 105z may be in DRX communications with UE 115y over link 351.
  • UE 115y may also be in SL DRX communications with UE 115x over SL 350.
  • UE 115y may be configured to include one or more DRX cycles (e.g., 550-552).
  • the DRX cycles of UE 115y may include active periods and inactive periods.
  • DRX cycles 550-552 may include active periods 500-502, respectively.
  • UE 115y may monitor for control information from either base station 105z and/or from UE 115x only during active periods 500-502.
  • UE 115y may monitor for DCI and/or SCI during active periods, but may not monitor for DCI and/or SCI outside of active periods (e.g., during inactive periods).
  • a DCI e.g., in a PDCCH
  • SCI e.g., in a PSCCH
  • the active period during which the DCI and/or SCI is received may be extended.
  • the active period of a DRX cycle of UE 115y may be a function of events in the link between base station 105z and UE 115y and in the SL between UE 115y and UE 115x.
  • each DRX cycle of UE 115y begins with an active period during which UE 115y monitors for DCI transmissions from base station 105z, and/or monitors for SCI from UE 115x.
  • DRX cycle 550 begins with active period 500
  • DRX cycle 551 begins with active period 501
  • DRX cycle 552 begins with active period 502.
  • base station 105z may transmit DCI in PDCCH 530 to UE 115y during active period 501 of DRX cycle 551.
  • a WUS may be sent from base station 105z to UE 115y prior to the transmission of PDCCH 530 to ensure that UE 115y is monitoring for PDCCH 530 during active period 501.
  • UE 115y in response to receiving the PDCCH transmission (e.g., the DCI transmission over PDCCH 530), UE 115y may extend active period 501 by extension period 520 when the DCI in PDCCH 530 indicates that a subsequent data transmission is to be transmitted to UE 115y from base station 105z.
  • the subsequent data transmission may be received by UE 115y during the extended active period.
  • active period 501 may be extended by starting and/or restarting an inactivity timer associated with DRX cycle 551.
  • SL resources 560a-d may occur during DRX cycles 550-552.
  • SL transmissions between UE 115x and 115y may be confined or restricted to these SL resources 560a-d.
  • UE 115x may transmit using any of SL resources 560a-d based on a grant from base station 105z.
  • UE 115x may desire to transmit data to UE 115y over SL 350.
  • UE 115x may send a request for a transmission grant to base station 105z (e.g., via uplink of link 351).
  • the transmission grant request sent by UE 115x may include an indication that the transmission grant requested is for transmission over SL 350 to UE 115y. In additional or alternative embodiments, the transmission grant request sent by UE 115x may not include an explicit indication that the transmission grant requested is for transmission over SL 350 to UE 115y. In these cases, base station 105z may determine that the target of the transmission grant request from UE 115x may be UE 115y based on a buffer status report (BSR) from UE 115x.
  • BSR buffer status report
  • base station 105z may grant the request for a transmission grant to UE 115x to transmit over SL 350.
  • base station 105z may send the transmission grant to UE 115x.
  • the transmission grant may include an indication that the transmission grant requested is for transmission over SL 350 to UE 115y.
  • the transmission grant may be provided to UE 115x in a DCI message that includes a resource allocation of SL resources in which UE 115x may transmit to UE 115y.
  • the allocated SL resources may be part of the SL resources to which SL communications may be restricted.
  • base station 105z may allocate SL resource 560d to UE 115x for transmission of data to UE 115y. In this example, SL resource 560d falls within active period 502 of DRX cycle 552.
  • UE 115y may monitor for SCI transmissions from UE 115x during active period 502.
  • base station 105z may send WUS 510 to UE 115y to ensure that UE 115y is monitoring for SCI transmissions over the SL in SL resource 560d during active period 502.
  • WUS 510 may be transmitted to UE 115y by base station 105z in response to base station 105z granting of the transmission grant to UE 115x.
  • UE 115x may transmit control information (e.g., SCI) in a PSCCH over SL 350, in SL resource 560d, to UE 115y.
  • control information e.g., SCI
  • the SCI may include an indication of which SL resources UE 115x is to use to transmit a subsequent data transmission (e.g., data transmission over the PSSCH), as well as other transmission parameters.
  • UE 115x may transmit the subsequent data transmission over the PSSCH using the resources specified in the SCI.
  • UE 115y may, after receiving the PSSCH transmission, provide feedback (e.g., over a PSFCH).
  • UE 115y in response to receiving the SCI transmission in the PSCCH in SL resource 560d during active period 502, may extend active period 502 by extension period 521 when the SCI in the PSCCH indicates that the subsequent data transmission is to be transmitted to UE 115y from UE 115x.
  • base station 105z may transmit data (e.g., DCI) to UE 115y during the extended active period of DRX cycle 552.
  • active period 502 may be extended by starting and/or restarting an inactivity timer associated with DRX cycle 552.
  • FIG. 6 is a block diagram illustrating example blocks executed to implement one aspect of the present disclosure. The example blocks will also be described with respect to UE 115 as illustrated in FIG. 9.
  • FIG. 9 is a block diagram illustrating UE 115 configured according to one aspect of the present disclosure.
  • UE 115 includes the structure, hardware, and components as illustrated for UE 115 of FIG. 2.
  • UE 115 includes controller/processor 280, which operates to execute logic or computer instructions stored in memory 282, as well as controlling the components of UE 115 that provide the features and functionality of UE 115.
  • UE 115 under control of controller/processor 280, transmits and receives signals via wireless radios 901a-r and antennas 252a-r.
  • Wireless radios 901a-r includes various components and hardware, as illustrated in FIG. 2 for UE 115, including modulator/demodulators 254a-r, MIMO detector 256, receive processor 258, transmit processor 264, and TX MIMO processor 266.
  • the description of the example blocks of FIG. 6 is from the perspective of the first UE, which may refer to a UE operating in DRX with SL in mode 1 (e.g., UE 115y described above).
  • the first UE may be in SL communications with a second UE (e.g., UE 115x).
  • abase station e.g., base station 105z
  • a first UE in communication with a second UE over an SL receives SCI in a PSCCH from the second UE over the SL.
  • the first UE e.g., UE 115
  • the first UE may receive SCI via antennas 252a-r and wireless radios 901a-r.
  • the first UE may be operating in DRX mode (e.g., DRX mode 1), and the PSCCH may be received by the first UE during an active period of a DRX cycle of the first UE.
  • the SCI received in the PSCCH from the second UE over the SL may be transmitted by the second UE in response to the second UE receiving a transmission grant from the base station.
  • the second UE may request a transmission grant from the base station, and the transmission grant request may include an indication by the second UE that the first UE is the target receiver of the SL transmission by the second UE.
  • the second UE may not include the indication, but the base station may determine that the first UE is the target receiver of the SL transmission by the second UE based on a B SR associated with the second UE.
  • the transmission grant may include an indication that the SCI transmission, and a subsequent data transmission, is to be made over the SL from the second UE to the first UE, and that the first UE is the intended target of the SL transmission.
  • the indication that the subsequent data transmission over the sidelink is intended for the first UE is included in a DCI message sent from the base station to the second UE.
  • the transmission grant may include configuration for the transmission of the SCI over the SL to the first UE.
  • the configuration may include specifying which SL resources are to be used by the second UE to transmit the SCI and, in some embodiments, the subsequent data transmission.
  • the first UE receives, prior to receiving the SCI in the PSCCH from the second UE, a WUS from the base station. Based on receiving the WUS, the first UE may be activated for reception during the active time. In embodiments, the first UE monitors, in response to receiving the WUS from the base station, the SL between the first UE and the second UE for transmission of the SCI from the second UE. In embodiments, the WUS is transmitted from the base station to the first UE in response to the base station granting the transmission grant to the second UE.
  • the first UE extends, in response to receiving the SCI in the PSCCH from the second UE, the active period of the DRX cycle in which the SCI in the PSCCH is received from the second UE when the PSCCH indicates that a subsequent data transmission over the SL from the second UE to the first UE is to be transmitted.
  • UE 115 under control of controller/processor 280, executes SL extension logic 902, stored in memory 282. The functionality implemented through the execution environment of SL extension logic 902 allows for UE 115 to perform active period extension operations according to the various aspects herein.
  • extending the active period of the DRX cycle includes one of starting an inactivity timer associated with the DRX cycle upon an end of the reception of the SCI in the PSCCH from the second UE, and restarting the inactivity timer associated with the DRX cycle upon the end of the reception of the SCI in the PSCCH from the second UE.
  • the first UE may receive a DCI message from the base station during the extended active period of the DRX cycle. In these embodiments, the DCI received by the first UE subsequent to receiving the SCI in the PSCCH from the second UE.
  • FIG. 7 is a block diagram illustrating example blocks executed to implement one aspect of the present disclosure.
  • the example blocks will also be described with respect to UE 115 as illustrated in FIG. 9. It is noted that the description of the example blocks of FIG. 7 is from the perspective of the first UE, which in this discussion may refer to a UE (e.g., UE 115x described above) in communication with a second UE that is operating in DRX with SL in mode 1 (e.g., UE 115y described above).
  • a base station e.g., base station 105z
  • a first UE in communication with a second UE over an SL receives a transmission grant from a base station serving the first UE and the second UE.
  • the first UE e.g., UE 115
  • the transmission grant received from the base station may be received in response to the first UE transmitting a request for a transmission grant to the base station.
  • the transmission grant request may include an indication by the first UE that the second UE is the target receiver of an SL transmission by the first UE.
  • the first UE may not include the indication, but the base station may determine that the second UE is the target receiver of the SL transmission by the first UE based on a B SR associated with the first UE.
  • the transmission grant may include an indication that the SCI transmission, and a subsequent data transmission, is to be made over the SL from the first UE to the second UE, and that the second UE is the intended target of the SL transmission.
  • the indication that the subsequent data transmission over the SL is intended for the second UE is included in a DCI message sent from the base station to the first UE.
  • the transmission grant may include configuration for the transmission of SCI in a PSCCH over the SL to the second UE.
  • the configuration may include specifying which SL resources are to be used by the first UE to transmit the SCI and, in some embodiments, the subsequent data transmission.
  • the second UE receives, prior to receiving the SCI in the PSCCH from the first UE, a WUS from the base station. Based on receiving the WUS, the second UE may be activated for reception during the active time. In embodiments, activating the second UE for reception may include the second UE monitoring, in response to receiving the WUS from the base station, the SL between the first UE and the second UE for transmission of the SCI from the first UE. In embodiments, the WUS is transmitted from the base station to the second UE in response to the base station granting the transmission grant to the first UE.
  • the first UE transmits, by the first UE, SCI in the PSCCH to the second UE.
  • the first UE e.g., UE 115
  • the second UE may be operating in DRX mode (e.g., DRX mode 1)
  • the SCI in the PSCCH may be received by the second UE during an active period of a DRX cycle of the second UE.
  • the SCI may include configuration for a subsequent data transmission from the first UE to the second UE over the SL.
  • transmitting the SCI in the PSCCH to the second UE causes the second UE to extend the active period of the DRX cycle of the second UE in which the SCI in the PSCCH is received when the PSCCH indicates the subsequent data transmission over the SL from the first UE to the second UE.
  • extending the active period of the DRX cycle includes one of: starting an inactivity timer associated with the DRX cycle upon an end of the reception of the SCI in the PSCCH from the first UE, and restarting the inactivity timer associated with the DRX cycle upon the end of the reception of the SCI in the PSCCH from the first UE.
  • the description of the example blocks of FIG. 6 is from the perspective of the first UE, which may refer to a UE operating in DRX with SL in mode 1 (e.g., UE 115y described above).
  • the first UE may be in SL communications with a second UE (e.g., UE 115x).
  • abase station e.g., base station 105z
  • FIG. 8 is a block diagram illustrating example blocks executed to implement one aspect of the present disclosure. The example blocks will also be described with respect to base station 105 as illustrated in FIG. 10.
  • FIG. 8 is a block diagram illustrating base station 105 configured according to one aspect of the present disclosure.
  • Base station 105 includes the structure, hardware, and components as illustrated for base station 105 of FIG. 2.
  • base station 105 includes controller/processor 240, which operates to execute logic or computer instructions stored in memory 242, as well as controlling the components of base station 105 that provide the features and functionality of base station 105.
  • Base station 105 under control of controller/processor 240, transmits and receives signals via wireless radios lOOla-t and antennas 234a-t.
  • Wireless radios lOOla-t includes various components and hardware, as illustrated in FIG. 2 for base station 105, including modulator/demodulators 232a-t, MIMO detector 236, receive processor 238, transmit processor 220, and TX MIMO processor 230.
  • a base station which may refer to a base station (e.g., base station 105z) serving one or both of a first UE and a second UE.
  • the second UE may be a UE operating in DRX with SL in mode 1 (e.g., UE 115y described above), and the first UE (e.g., UE 115x) may be in SL communications with the second UE.
  • a base station serving a first UE and a second UE transmits a transmission grant to the first UE.
  • base station 105 under control of controller/processor 240, executes transmission logic 1002, stored in memory 242.
  • the functionality implemented through the execution environment of transmission logic 1002 allows for base station 105 to perform transmission grant transmission operations according to the various aspects herein.
  • the first UE may be in communication with the second UE over an SL, and the second UE may be operating in DRX mode.
  • the transmission grant may be transmitted in a DCI to the first UE, and may be transmitted in response to receiving a request for the transmission grant from the first UE.
  • the transmission grant request may include an indication by the first UE that the second UE is the target receiver of an SL transmission by the first UE.
  • the first UE may not include the indication, but the base station may determine that the second UE is the target receiver of the SL transmission by the first UE based on a B SR associated with the first UE.
  • the transmission grant may include an indication that the SCI transmission, and a subsequent data transmission, is to be made over the SL from the first UE to the second UE, and that the second UE is the intended target of the SL transmission.
  • the indication that the subsequent data transmission over the SL is intended for the second UE is included in a DCI message sent from the base station to the first UE.
  • the transmission grant may include configuration for the transmission of SCI in a PSCCH over the SL from the first UE to the second UE.
  • the configuration may include specifying which SL resources are to be used by the first UE to transmit the SCI and, in some embodiments, the subsequent data transmission.
  • transmitting the transmission grant to the first UE may cause the first UE to send the SCI in the PSCCH to the second UE via the SL between the first UE and the second UE.
  • the SCI in the PSCCH may be transmitted by the first UE and/or received by the second UE during an active period of a DRX cycle of the second UE.
  • the base station may transmit, in response to transmitting the transmission grant to the first UE, a WUS to the second UE. The WUS may be transmitted to ensure that the second UE is “awake” during a next activity period of the DRX cycle to monitor for SCI transmissions from the first UE.
  • the base station nay transmit the WUS to the second UE prior to the first UE transmitting the SCI in the PSCCH to the second UE.
  • receiving the SCI in the PSCCH from the first UE causes the second UE to extend the active period of the DRX cycle of the second UE in which the SCI in the PSCCH is received, when the PSCCH indicates the subsequent data transmission over the sidelink from the first UE to the second UE.
  • causing the second UE to extend the active period of the DRX cycle includes one of causing the second UE to start an inactivity timer associated with the DRX cycle upon an end of the reception of the SCI in the PSCCH from the first UE, and causing the second UE to restart the inactivity timer associated with the DRX cycle upon the end of the reception of the SCI in the PSCCH from the first UE.
  • the base station may transmit a DCI message to the second UE during the extended active period of the DRX cycle.
  • the DCI transmitted to the first UE may be subsequent to receiving the SCI in the PSCCH from the second UE.
  • FIG. 11 is a diagram illustrating an example implementation of a DRX with SL in mode 2 process to implement one aspect of the present disclosure.
  • base station 105z may be in DRX communications with UE 115y over link 351.
  • the DRX communication between base station 105z and UE 115y may be configured with a Uu DRX configuration, as also described above.
  • UE 115y may also be in DRX communications with UE 115x over SL 350.
  • the DRX communication between UE 115x and UE 115y may be configured with an SL DRX configuration.
  • UE 115y may be configured with two DRX configurations (e.g., a Uu DRX configuration and an SL DRX configuration) using different DRX timers.
  • UE 115y may be configured to implement DRX communications concurrently with a base station and an SL UE, enabling UE 115y to leverage the benefits of DRX communication (e.g., power savings) while implementing an SL communications scheme.
  • the Uu DRX configuration for the DRX communication between UE 115y and base station 105z may include one or more Uu DRX cycles (e.g., 1 ISO- 1152).
  • the Uu DRX cycles of UE 115y may include active periods and inactive periods.
  • Uu DRX cycles 1150-1152 may include active periods 1100-1102, respectively.
  • UE 115y may monitor for control information from base station 105z during active periods 1100-1102.
  • UE 115y may monitor for DCI during active periods, but may not monitor for DCI outside of active periods (e.g., during inactive periods).
  • a DCI transmission e.g., in a PDCCH
  • the active period during which the DCI is received may be extended. In that sense, the active period of a Uu DRX cycle of UE 115y may be a function of events in the link between base station 105z and UE 115y.
  • the SL DRX configuration for the SL DRX communication between UE 115y and UE 115x may include one or more SL DRX cycles (e.g., 1170-1172).
  • the SL DRX cycles of UE 115y may include active periods and inactive periods.
  • SL DRX cycles 1170-1172 may include active periods 1180-1182, respectively.
  • UE 115y may monitor for control information from UE 115x during active periods 1180-1182.
  • UE 115y may monitor for SCI transmissions from UE 115x over SL 350 during active periods, but may not monitor for SCI transmissions outside of active periods (e.g., during inactive periods).
  • the active period during which the SCI is received may be extended.
  • the active period of an SL DRX cycle of UE 115y may be a function of events in the SL between UE 115y and UE 115x.
  • extending the active period of a Uu DRX cycle and/or an SL DRX cycle may include starting and/or restarting an inactivity timer associated with the respective DRX cycle in which the control information (DCI or SCI) is received.
  • DCI or SCI control information
  • active period 1101 may be extended by extension period 1120 after the end of the PDCCH reception.
  • active period 1181 may be extended by extension period 1121 after the end of the PSCCH reception.
  • a WUS may be sent from base station 105z to UE 115y prior to the transmission of PDCCH 1130 to ensure that UE 115y is monitoring for PDCCH 1130 during active period 1101.
  • UE 115y may extend active period 1101 by extension period 1120 when the DCI in PDCCH 1130 indicates that a subsequent data transmission is to be transmitted to UE 115y from base station 105z.
  • the subsequent data transmission may be received by UE 115y during the extended active period.
  • UE 115y may be configured to provide the SL DRX configuration, including resources and timers, to other UEs, such as UE 115x.
  • Providing the SL DRX configuration to other UEs may include transmitting a message (e.g., an SCI message over an SL link) from the DRX UE to other UEs.
  • SL resources 1160a-f may occur during DRX cycles 1170- 1172.
  • SL transmissions between UE 115x and 115y may be confined or restricted to these SL resources 1160a-f.
  • UE 115x may transmit using any of SL resources 1160a-f.
  • UE 115x may desire to transmit data to UE 115y over SL 350.
  • UE 115x may schedule an SCI transmission to UE 115y over the SL in one of SL resources 1160a-f.
  • UE 115y may monitor for SCI transmissions from UE 115x during active periods 1180-1182. In some embodiments, UE 115y may monitor for SCI transmissions only during the duration of an SL resource that overlaps an active period. For example, active period 1180 overlaps SL resource 1160a. In this case, UE 115y may only monitor for SCI transmissions during the duration of SL resource 1160a, and may not monitor for SCI transmissions during the portion of active period 1180 that does not overlap SL resource 1160a. In other embodiments, UE 115y may monitor during the entirety of active period 1180. In another example, UE 115y may not monitor, or may forgo monitoring for SCI transmissions during SL resource 1160b, because SL resource 1160b does not overlap an active period.
  • UE 115x may transmit control information (e.g., SCI) to UE 115y over SL 350 in SL resource 1160c.
  • the SCI may include an indication of which SL resources UE 115x is to use to transmit a subsequent data transmission (e.g., data transmission over the PSSCH), as well as other transmission parameters.
  • UE 115x may transmit the subsequent data transmission over the PSSCH using the resources specified in the SCI.
  • UE 115y may, after receiving the PSSCH transmission, provide feedback (e.g., over a PSFCH).
  • UE 115y in response to receiving the SCI transmission in the PSCCH in SL resource 1160c during active period 1181, may extend active period 1181 by extension period 1121 when the SCI in the PSCCH indicates that the subsequent data transmission is to be transmitted to UE 115y from UE 115x.
  • active period 1181 may be extended by starting and/or restarting an inactivity timer associated with SL DRX cycle 1171.
  • FIG. 12 is a block diagram illustrating example blocks executed to implement one aspect of the present disclosure. The example blocks will also be described with respect to UE 115 as illustrated in FIG. 9.
  • the description of the example blocks of FIG. 12 is from the perspective of the first UE, which may refer to a UE operating in DRX with SL in mode 2 (e.g., UE 115y described above).
  • the first UE may be in SL communications with a second UE (e.g., UE 115x).
  • abase station e.g., base station 105z
  • a first UE in communication with a second UE over an SL sends an SL DRX configuration to the second UE.
  • UE 115 under control of controller/processor 280, executes transmission logic 902, stored in memory 282.
  • the functionality implemented through the execution environment of transmission logic 902 allows for UE 115 to perform SL DRX configuration transmission operations according to the various aspects herein.
  • the SL DRX configuration may specify an SL DRX mode of the first UE with respect to the SL.
  • the SL DRX mode of the first UE may include at least one SL DRX cycle with an active period for reception over the SL and an inactive period of reception over the SL.
  • the first UE may monitor for transmissions (e.g., SCI transmissions) from the second UE.
  • the first UE may not monitor for transmissions (e.g., SCI transmissions) from the second UE.
  • a configuration of the SL between the first UE and the second UE may include at least one SL resource.
  • transmissions between the first UE and the second UE over the SL may be restricted to the at least one SL resource.
  • the communication between the first UE and the second UE over the SL is performed without requesting a transmission grant from a base station.
  • the first UE may be further configured for Uu DRX mode with respect to communications with a base station.
  • the Uu DRX mode of the first UE may include at least one Uu DRX cycle with an active period for reception over a link between the first UE and the base station and an inactive period of reception over the link.
  • the first UE may monitor for transmissions (e.g., DCI transmissions) from the base station.
  • the inactive period the first UE may not monitor for transmissions (e.g., DCI transmissions) from the base station.
  • the first UE receives SCI in a PSCCH from the second UE over the SL.
  • the first UE e.g., UE 115
  • the second UE may receive SCI via antennas 252a-r and wireless radios 901a-r.
  • the SCI in the PSCCH may be received by the first UE during the active period of the SL DRX cycle of the first UE.
  • receiving the SCI in the PSCCH from the second UE may include monitoring, by the first UE, SL resources associated with the first UE for transmission of the SCI from the second UE.
  • the monitored SL resources may overlap with the active period of the SL DRX cycle of the first UE.
  • the first UE extends, in response to receiving the SCI in the PSCCH from the second UE, the active period of the at least one SL DRX cycle in which the SCI in the PSCCH is received from the second UE when the SCI in the PSCCH indicates a subsequent data transmission over the SL from the second UE to the first UE.
  • UE 115 under control of controller/processor 280, executes SL extension logic 902, stored in memory 282.
  • the functionality implemented through the execution environment of SL extension logic 902 allows for UE 115 to perform active period extension operations according to the various aspects herein.
  • extending the active period of the SL DRX cycle includes one of starting an inactivity timer associated with the SL DRX cycle upon an end of the reception of the SCI in the PSCCH from the second UE, and restarting the inactivity timer associated with the SL DRX cycle upon the end of the reception of the SCI in the PSCCH from the second UE.
  • FIG. 13 is a block diagram illustrating example blocks executed to implement one aspect of the present disclosure. The example blocks will also be described with respect to UE 115 as illustrated in FIG. 9. It is noted that the description of the example blocks of FIG.
  • a first UE in communication with a second UE over an SL receives an SL DRX configuration from the second UE.
  • the first UE e.g., UE 115
  • the second UE may receive SL DRX configuration via antennas 252a-r and wireless radios 901a-r.
  • the SL DRX configuration may specify an SL DRX mode of the second UE with respect to the SL.
  • the SL DRX mode of the second UE may include at least one SL DRX cycle with an active period for reception over the SL and an inactive period of reception over the SL.
  • the second UE may monitor for transmissions (e.g., SCI transmissions) from the second UE.
  • the inactive period the second UE may not monitor for transmissions (e.g., SCI transmissions) from the second UE.
  • a configuration of the SL between the first UE and the second UE may include at least one SL resource.
  • transmissions between the first UE and the second UE over the SL may be restricted to the at least one SL resource.
  • the communication between the first UE and the second UE over the SL is performed without requesting a transmission grant from a base station.
  • the second UE may be further configured for Uu DRX mode with respect to communications with a base station.
  • the Uu DRX mode of the second UE may include at least one Uu DRX cycle with an active period for reception over a link between the second UE and the base station and an inactive period of reception over the link.
  • the second UE may monitor for transmissions (e.g., DCI transmissions) from the base station.
  • the second UE may not monitor for transmissions (e.g., DCI transmissions) from the base station.
  • the first UE transmits SCI in aPSCCHto the second UE.
  • the SCI in the PSCCH may be received by the second UE during the active period of the at least one SL DRX cycle of the second UE.
  • UE 115 under control of controller/processor 280, executes transmission logic 902, stored in memory 282.
  • the functionality implemented through the execution environment of transmission logic 902 allows for UE 115 to perform SCI transmission operations according to the various aspects herein.
  • transmitting the SCI in the PSCCH to the second UE includes transmitting the SCI in the PSCCH in an SL resource of the at least one SL resource of the SL between the first UE and the second UE that overlap with an active period of the at least one SL DRX cycle of the second UE.
  • SL resource is monitored, by the second UE, for transmission of the SCI from the first UE.
  • the first UE causes the second UE to extend, in response to receiving the SCI in the PSCCH from the first UE, the active period of the at least one SL DRX cycle in which the SCI in the PSCCH is received from the first UE when the SCI in the PSCCH indicates a subsequent data transmission over the SL from the first UE to the second UE.
  • causing the second UE to extend the active period of the SL DRX cycle includes one of: causing the second UE to start an inactivity timer associated with the SL DRX cycle upon an end of the reception of the SCI in the PSCCH from the first UE, and causing the second UE to restart the inactivity timer associated with the SL DRX cycle upon the end of the reception of the SCI in the PSCCH from the first UE.
  • Components, the functional blocks and modules described herein may comprise processors, electronics devices, hardware devices, electronics components, logical circuits, memories, software codes, firmware codes, etc., or any combination thereof.
  • features discussed herein may be implemented via specialized processor circuitry, via executable instructions, and/or combinations thereof.
  • DSP digital signal processor
  • ASIC application specific integrated circuit
  • FPGA field programmable gate array
  • a general-purpose processor may be a microprocessor, but in the alternative, the processor may be any conventional processor, controller, microcontroller, or state machine.
  • a processor may also be implemented as a combination of computing devices, e.g., a combination of a DSP and a microprocessor, a plurality of microprocessors, one or more microprocessors in conjunction with a DSP core, or any other such configuration.
  • a software module may reside in RAM memory, flash memory, ROM memory, EPROM memory, EEPROM memory, registers, hard disk, a removable disk, a CD-ROM, or any other form of storage medium known in the art.
  • An exemplary storage medium is coupled to the processor such that the processor may read information from, and write information to, the storage medium.
  • the storage medium may be integral to the processor.
  • the processor and the storage medium may reside in an ASIC.
  • the ASIC may reside in a user terminal.
  • the processor and the storage medium may reside as discrete components in a user terminal.
  • the functions described may be implemented in hardware, software, firmware, or any combination thereof. If implemented in software, the functions may be stored on or transmitted over as one or more instructions or code on a computer-readable medium.
  • Computer-readable media includes both computer storage media and communication media including any medium that facilitates transfer of a computer program from one place to another. Computer-readable storage media may be any available media that may be accessed by a general purpose or special purpose computer.
  • such computer-readable media may comprise RAM, ROM, EEPROM, CD-ROM or other optical disk storage, magnetic disk storage or other magnetic storage devices, or any other medium that may be used to carry or store desired program code means in the form of instructions or data structures and that may be accessed by a general-purpose or special-purpose computer, or a general-purpose or special-purpose processor.
  • a connection may be properly termed a computer- readable medium.
  • the software is transmitted from a website, server, or other remote source using a coaxial cable, fiber optic cable, twisted pair, or digital subscriber line (DSL), then the coaxial cable, fiber optic cable, twisted pair, or DSL, are included in the definition of medium.
  • DSL digital subscriber line
  • Disk and disc includes compact disc (CD), laser disc, optical disc, digital versatile disc (DVD), hard disk, solid state disk, and blu-ray disc where disks usually reproduce data magnetically, while discs reproduce data optically with lasers. Combinations of the above should also be included within the scope of computer-readable media.
  • the term “and/or,” when used in a list of two or more items, means that any one of the listed items may be employed by itself, or any combination of two or more of the listed items may be employed.
  • the composition may contain A alone; B alone; C alone; A and B in combination; A and C in combination; B and C in combination; or A, B, and C in combination.

Abstract

Des systèmes et un procédé de configuration et de fourniture d'opérations de réception discontinue (DRX) dans le mode de liaison latérale (SL) 1 et 2 sont divulgués. Un premier équipement utilisateur (UE) peut fonctionner dans des communications DRX avec un second UE sur une SL tout en maintenant simultanément des communications DRX avec une station de base. Dans certains modes de réalisation, les opérations DRX peuvent comprendre la première surveillance d'UE pour l'une ou l'autre des transmissions dans une liaison descendante à partir d'une station de base et dans la SL à partir du second UE pendant une période active d'un cycle DRX de la configuration DRX. Dans des modes de réalisation, l'UE peut étendre la période active associée au cycle DRX lorsque des informations de commande provenant de la station de base ou du second UE sont reçues. D'autres aspects et caractéristiques sont également revendiqués et décrits.
EP21801377.9A 2020-09-24 2021-09-24 Réception discontinue (drx) avec liaison latérale (sl) Pending EP4218358A1 (fr)

Applications Claiming Priority (3)

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US202063083053P 2020-09-24 2020-09-24
US17/448,665 US11849396B2 (en) 2020-09-24 2021-09-23 Discontinuous reception (DRX) with sidelink (SL)
PCT/US2021/071592 WO2022067339A1 (fr) 2020-09-24 2021-09-24 Réception discontinue (drx) avec liaison latérale (sl)

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