WO2018058586A1 - Commande drx dans des environnements sc-ptm - Google Patents

Commande drx dans des environnements sc-ptm Download PDF

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Publication number
WO2018058586A1
WO2018058586A1 PCT/CN2016/101224 CN2016101224W WO2018058586A1 WO 2018058586 A1 WO2018058586 A1 WO 2018058586A1 CN 2016101224 W CN2016101224 W CN 2016101224W WO 2018058586 A1 WO2018058586 A1 WO 2018058586A1
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WO
WIPO (PCT)
Prior art keywords
end command
timer
broadcast
cycle
broadcast end
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Application number
PCT/CN2016/101224
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English (en)
Inventor
Kuo-Chun Lee
Sivaramakrishna Veerepalli
Feilu Liu
Ralph Akram Gholmieh
Masato Kitazoe
Xipeng Zhu
Alberto Rico Alvarino
Hao Xu
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Qualcomm Incorporated
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.)
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Publication date
Application filed by Qualcomm Incorporated filed Critical Qualcomm Incorporated
Priority to PCT/CN2016/101224 priority Critical patent/WO2018058586A1/fr
Publication of WO2018058586A1 publication Critical patent/WO2018058586A1/fr

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    • 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
    • H04W52/00—Power management, e.g. TPC [Transmission Power Control], power saving or power classes
    • H04W52/02—Power saving arrangements
    • 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]
    • 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

  • the present disclosure relates generally to communication systems, and more particularly, to a base station that is configured to send, to a user equipment, a command to stop one or more timers at the user equipment.
  • Wireless communication systems are widely deployed to provide various telecommunication services such as telephony, video, data, messaging, and broadcasts.
  • Typical wireless communication systems may employ multiple-access technologies capable of supporting communication with multiple users by sharing available system resources. Examples of such multiple-access technologies include code division multiple access (CDMA) systems, time division multiple access (TDMA) systems, frequency division multiple access (FDMA) systems, orthogonal frequency division multiple access (OFDMA) systems, single-carrier frequency division multiple access (SC-FDMA) systems, and time division synchronous code division multiple access (TD-SCDMA) systems.
  • CDMA code division multiple access
  • TDMA time division multiple access
  • FDMA frequency division multiple access
  • OFDMA orthogonal frequency division multiple access
  • SC-FDMA single-carrier frequency division multiple access
  • TD-SCDMA time division synchronous code division multiple access
  • LTE Long Term Evolution
  • UMTS Universal Mobile Telecommunications System
  • 3GPP Third Generation Partnership Project
  • LTE is designed to support mobile broadband access through improved spectral efficiency, lowered costs, and improved services using OFDMA on the downlink, SC-FDMA on the uplink, and multiple-input multiple-output (MIMO) antenna technology.
  • MIMO multiple-input multiple-output
  • a method, a computer-readable medium, and an apparatus are provided.
  • the apparatus be a user equipment (UE) .
  • the apparatus may initiate an on-timer in response to waking from a sleep cycle of a discontinuous reception (DRX) configuration, wherein the waking from the sleep cycle starts an on-cycle of the DRX configuration.
  • the apparatus may receive an initial portion of broadcast content during the on-cycle of the DRX configuration.
  • the apparatus may initiate an inactivity-timer in response to the reception, the on-timer and the inactivity-timer each having default durations.
  • the apparatus may receive a subsequent portion of the broadcast content and a broadcast end command, wherein the initial portion and the subsequent portion define the entire broadcast content.
  • the apparatus may initiate a sleep-cycle prior to the expiration of the on-timer and the inactivity-timer default durations based on the broadcast end command.
  • a second method, a second computer-readable medium, and a second apparatus may transmit, to a UE, information associated with a DRX configuration, the information including at least a default duration of an on-timer associated with an on-cycle of the UE and a default duration of an inactivity-timer.
  • the second apparatus may transmit, to the UE, an initial portion of broadcast content during the on-cycle of the DRX configuration.
  • the second apparatus may transmit, to the UE, a subsequent portion of the broadcast content, wherein the initial portion and the subsequent portion define the entire broadcast content.
  • the second apparatus may transmit, to the UE, a first broadcast end command, wherein the first broadcast end command is intended to cause the UE to transition to a sleep-cycle of the DRX configuration prior to expiration of the on-timer default duration and the inactivity-timer default duration apparatus may be a base station.
  • FIG. 1 is a diagram illustrating an example of a wireless communications system and an access network.
  • FIGs. 2A, 2B, 2C, and 2D are diagrams illustrating LTE examples of a DL frame structure, DL channels within the DL frame structure, an UL frame structure, and UL channels within the UL frame structure, respectively.
  • FIG. 3 is a diagram illustrating an example of an evolved Node B (eNB) and user equipment (UE) in an access network.
  • eNB evolved Node B
  • UE user equipment
  • FIG. 4A is a diagram illustrating an example of Multicast Broadcast Single Frequency Network areas in an access network.
  • FIG. 4B is a diagram illustrating an example of an evolved Multimedia Broadcast Multicast Service channel configuration in a Multicast Broadcast Single Frequency Network.
  • FIG. 4C is a diagram illustrating a format of a Multicast Channel (MCH) Scheduling Information (MSI) Medium Access Control element.
  • MCH Multicast Channel
  • MSI Scheduling Information
  • FIG. 7 is a call flow diagram of a method of wireless communication.
  • FIG. 8 is a diagram of a wireless communications system.
  • FIG. 9 is a diagram of a wireless communications system.
  • FIG. 10 is a call flow diagram of a method of wireless communication.
  • FIG. 11 is a diagram of a wireless communications system.
  • FIG. 13 is a flowchart of a method of wireless communication.
  • FIG. 14 is a conceptual data flow diagram illustrating the data flow between different means/components in an exemplary apparatus.
  • FIG. 15 is a diagram illustrating an example of a hardware implementation for an apparatus employing a processing system.
  • FIG. 16 is a conceptual data flow diagram illustrating the data flow between different means/components in an exemplary apparatus.
  • FIG. 17 is a diagram illustrating an example of a hardware implementation for an apparatus employing a processing system.
  • processors include microprocessors, microcontrollers, graphics processing units (GPUs) , central processing units (CPUs) , application processors, digital signal processors (DSPs) , reduced instruction set computing (RISC) processors, systems on a chip (SoC) , baseband processors, field programmable gate arrays (FPGAs) , programmable logic devices (PLDs) , state machines, gated logic, discrete hardware circuits, and other suitable hardware configured to perform the various functionality described throughout this disclosure.
  • processors in the processing system may execute software.
  • Software shall be construed broadly to mean instructions, instruction sets, code, code segments, program code, programs, subprograms, software components, applications, software applications, software packages, routines, subroutines, objects, executables, threads of execution, procedures, functions, etc., whether referred to as software, firmware, middleware, microcode, hardware description language, or otherwise.
  • such computer-readable media can comprise a random-access memory (RAM) , a read-only memory (ROM) , an electrically erasable programmable ROM (EEPROM) , optical disk storage, magnetic disk storage, other magnetic storage devices, combinations of the aforementioned types of computer-readable media, or any other medium that can be used to store computer executable code in the form of instructions or data structures that can be accessed by a computer.
  • RAM random-access memory
  • ROM read-only memory
  • EEPROM electrically erasable programmable ROM
  • optical disk storage magnetic disk storage
  • magnetic disk storage other magnetic storage devices
  • combinations of the aforementioned types of computer-readable media or any other medium that can be used to store computer executable code in the form of instructions or data structures that can be accessed by a computer.
  • FIG. 1 is a diagram illustrating an example of a wireless communications system and an access network 100.
  • the wireless communications system also referred to as a wireless wide area network (WWAN)
  • WWAN wireless wide area network
  • the base stations 102 may include macro cells (high power cellular base station) and/or small cells (low power cellular base station) .
  • the macro cells include eNBs.
  • the small cells include femtocells, picocells, and microcells.
  • the base stations 102 (collectively referred to as Evolved Universal Mobile Telecommunications System (UMTS) Terrestrial Radio Access Network (E-UTRAN) ) interface with the EPC 160 through backhaul links 132 (e.g., S1 interface) .
  • UMTS Universal Mobile Telecommunications System
  • E-UTRAN Evolved Universal Mobile Telecommunications System Terrestrial Radio Access Network
  • the base stations 102 may wirelessly communicate with the UEs 104. Each of the base stations 102 may provide communication coverage for a respective geographic coverage area 110. There may be overlapping geographic coverage areas 110. For example, the small cell 102'may have a coverage area 110'that overlaps the coverage area 110 of one or more macro base stations 102.
  • a network that includes both small cell and macro cells may be known as a heterogeneous network.
  • a heterogeneous network may also include Home Evolved Node Bs (eNBs) (HeNBs) , which may provide service to a restricted group known as a closed subscriber group (CSG) .
  • eNBs Home Evolved Node Bs
  • HeNBs Home Evolved Node Bs
  • CSG closed subscriber group
  • the communication links 120 between the base stations 102 and the UEs 104 may include uplink (UL) (also referred to as reverse link) transmissions from a UE 104 to a base station 102 and/or downlink (DL) (also referred to as forward link) transmissions from a base station 102 to a UE 104.
  • the communication links 120 may use MIMO antenna technology, including spatial multiplexing, beamforming, and/or transmit diversity.
  • the communication links may be through one or more carriers.
  • the base stations 102 /UEs 104 may use spectrum up to Y MHz (e.g., 5, 10, 15, 20 MHz) bandwidth per carrier allocated in a carrier aggregation of up to a total of Yx MHz (x component carriers) used for transmission in each direction.
  • the carriers may or may not be adjacent to each other. Allocation of carriers may be asymmetric with respect to DL and UL (e.g., more or less carriers may be allocated for DL than for UL) .
  • the component carriers may include a primary component carrier and one or more secondary component carriers.
  • a primary component carrier may be referred to as a primary cell (PCell) and a secondary component carrier may be referred to as a secondary cell (SCell) .
  • the wireless communications system may further include a Wi-Fi access point (AP) 150 in communication with Wi-Fi stations (STAs) 152 via communication links 154 in a 5 GHz unlicensed frequency spectrum.
  • AP Wi-Fi access point
  • STAs Wi-Fi stations
  • communication links 154 in a 5 GHz unlicensed frequency spectrum.
  • the STAs 152 /AP 150 may perform a clear channel assessment (CCA) prior to communicating in order to determine whether the channel is available.
  • CCA clear channel assessment
  • the small cell 102' may operate in a licensed and/or an unlicensed frequency spectrum.
  • the small cell 102' may employ LTE and use the same 5 GHz unlicensed frequency spectrum as used by the Wi-Fi AP 150.
  • the small cell 102', employing LTE in an unlicensed frequency spectrum may boost coverage to and/or increase capacity of the access network.
  • LTE in an unlicensed spectrum may be referred to as LTE-unlicensed (LTE-U) , licensed assisted access (LAA) , or MuLTEfire.
  • the millimeter wave (mmW) base station 180 may operate in mmW frequencies and/or near mmW frequencies in communication with the UE 182.
  • Extremely high frequency (EHF) is part of the RF in the electromagnetic spectrum. EHF has a range of 30 GHz to 300 GHz and a wavelength between 1 millimeter and 10 millimeters. Radio waves in the band may be referred to as a millimeter wave.
  • Near mmW may extend down to a frequency of 3 GHz with a wavelength of 100 millimeters.
  • the super high frequency (SHF) band extends between 3 GHz and 30 GHz, also referred to as centimeter wave. Communications using the mmW /near mmW radio frequency band has extremely high path loss and a short range.
  • the mmW base station 180 may utilize beamforming 184 with the UE 182 to compensate for the extremely high path loss and short range.
  • the EPC 160 may include a Mobility Management Entity (MME) 162, other MMEs 164, a Serving Gateway 166, a Multimedia Broadcast Multicast Service (MBMS) Gateway 168, a Broadcast Multicast Service Center (BM-SC) 170, and a Packet Data Network (PDN) Gateway 172.
  • MME Mobility Management Entity
  • MBMS Multimedia Broadcast Multicast Service
  • BM-SC Broadcast Multicast Service Center
  • PDN Packet Data Network
  • the MME 162 may be in communication with a Home Subscriber Server (HSS) 174.
  • HSS Home Subscriber Server
  • the MME 162 is the control node that processes the signaling between the UEs 104 and the EPC 160.
  • the MME 162 provides bearer and connection management. All user Internet protocol (IP) packets are transferred through the Serving Gateway 166, which itself is connected to the PDN Gateway 172.
  • IP Internet protocol
  • the PDN Gateway 172 provides UE IP address allocation as well as other functions.
  • the PDN Gateway 172 and the BM-SC 170 are connected to the IP Services 176.
  • the IP Services 176 may include the Internet, an intranet, an IP Multimedia Subsystem (IMS) , a PS Streaming Service (PSS) , and/or other IP services.
  • the BM-SC 170 may provide functions for MBMS user service provisioning and delivery.
  • the BM-SC 170 may serve as an entry point for content provider MBMS transmission, may be used to authorize and initiate MBMS Bearer Services within a public land mobile network (PLMN) , and may be used to schedule MBMS transmissions.
  • PLMN public land mobile network
  • the MBMS Gateway 168 may be used to distribute MBMS traffic to the base stations 102 belonging to a Multicast Broadcast Single Frequency Network (MBSFN) area broadcasting a particular service, and may be responsible for session management (start/stop) and for collecting eMBMS related charging information.
  • MMSFN Multicast Broadcast Single Frequency Network
  • the base station may also be referred to as a Node B, evolved Node B (eNB) , an access point, a base transceiver station, a radio base station, a radio transceiver, a transceiver function, a basic service set (BSS) , an extended service set (ESS) , or some other suitable terminology.
  • the base station 102 provides an access point to the EPC 160 for a UE 104.
  • Examples of UEs 104 include a cellular phone, a smart phone, a session initiation protocol (SIP) phone, a laptop, a personal digital assistant (PDA) , a satellite radio, a global positioning system, a multimedia device, a video device, a digital audio player (e.g., MP3 player) , a camera, a game console, a tablet, a smart device, a wearable device, or any other similar functioning device.
  • SIP session initiation protocol
  • PDA personal digital assistant
  • the UE 104 may also be referred to as a station, a mobile station, 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, a mobile terminal, a wireless terminal, a remote terminal, a handset, a user agent, a mobile client, a client, or some other suitable terminology.
  • the UE 104 may operate according to a discontinuous reception (DRX) configuration, for example, to conserve power at the UE.
  • DRX discontinuous reception
  • data communication cyclically occurs at intervals. Between those intervals, the UE 104 may enter a low-power state, a “sleep-cycle, ” an off-cycle, or similar power-conservation state in which data reception by the UE is paused or suspended.
  • the UE 104 may enter a high-power state, a “wake-up” cycle, an on-cycle, or similar state in which the UE 104 receives data, e.g., from the eNB 102.
  • the duration of the on-cycle may be dictated by one or more timers of the UE 104.
  • the UE 104 may include an on-timer that defines the duration for which the UE 104 remains in the on-cycle, and an inactivity timer that defines duration for which the UE 104 should be remain active after successfully decoding a data.
  • the timers may be defined by one or more technical specifications promulgated by 3GPP for wireless communication standards (e.g., LTE, LTE-A, and the like) .
  • the eNB 102 may be configured to transmit broadcast content to the UE 104. However, the UE 104 may be required to wait for both the on-timer and the inactivity-timer to expire before the UE 104 may enter the sleep-cycle of a DRX configuration, even after the broadcast content has ended (i.e., the eNB 102 has no further broadcast content to transmit to the UE 104) . Consequently, the UE 104 may be required to remain in an on-cycle even after data transmission to the UE 104 has ended.
  • the eNB 102 may be configured to may be configured to cause the UE 104 to transition to the sleep-cycle of the DRX configuration prior to expiration of one or more timers associated with the DRX configuration at the UE 104.
  • the eNB 102 may transmit, to the UE 104, information associated with the DRX configuration. This information may include at least a default duration of an on-timer associated with the on-cycle of the UE 104 and a default duration of an inactivity-timer.
  • the UE 104 may be configured to initiate the on-timer in response to waking from a sleep-cycle of the DRX configuration. This waking may initiate the on-cycle of the DRX configuration, the duration of which may be defined by the eNB 102.
  • the eNB 102 may transmit, to the UE 104, an initial portion of broadcast content during an on-cycle of the DRX configuration.
  • the UE 104 may receive the initial portion of the broadcast content and may initiate the inactivity timer in response to the reception of the initial portion.
  • each portion of the broadcast content may be packetized at different layers –e.g., a respective portion of the broadcast content may be packetized into a packet data unit (PDU) that includes a header and a data portion.
  • PDU packet data unit
  • the eNB 102 may transmit other portions of the broadcast content to the UE 104, including at least a subsequent portion such that the initial portion and the subsequent portion define the entire broadcast content.
  • Each reception of a respective portion of the broadcast content by the UE 104 may cause the UE 104 to restart the inactivity timer.
  • the eNB 102 may determine that the subsequent portion (e.g., including at least a last packet) defines the entire broadcast content and therefore the UE 104 should be allowed to enter a sleep-cycle even though the on-timer and/or the inactivity-timer at the UE 104 have not yet expired. Accordingly, the eNB 102 may transmit, to the UE 104, a first broadcast end command 198 that is intended to cause the UE 104 to transition to the sleep-cycle of the DRX configuration prior to expiration of the on-timer default duration and the inactivity-timer default duration.
  • a first broadcast end command 198 that is intended to cause the UE 104 to transition to the sleep-cycle of the DRX configuration prior to expiration of the on-timer default duration and the inactivity-timer default duration.
  • the UE 104 may receive the subsequent portion of the broadcast content and the broadcast end command 198.
  • the UE 104 may initiate the sleep-cycle prior to the expiration of the on-timer and inactivity-timer default durations based on the broadcast end command 198.
  • FIG. 2A is a diagram 200 illustrating an example of a DL frame structure in LTE.
  • FIG. 2B is a diagram 230 illustrating an example of channels within the DL frame structure in LTE.
  • FIG. 2C is a diagram 250 illustrating an example of an UL frame structure in LTE.
  • FIG. 2D is a diagram 280 illustrating an example of channels within the UL frame structure in LTE.
  • Other wireless communication technologies may have a different frame structure and/or different channels.
  • a frame (10 ms) may be divided into 10 equally sized subframes. Each subframe may include two consecutive time slots.
  • a resource grid may be used to represent the two time slots, each time slot including one or more time concurrent resource blocks (RBs) (also referred to as physical RBs (PRBs) ) .
  • the resource grid is divided into multiple resource elements (REs) .
  • REs resource elements
  • an RB contains 12 consecutive subcarriers in the frequency domain and 7 consecutive symbols (for DL, OFDM symbols; for UL, SC-FDMA symbols) in the time domain, for a total of 84 REs.
  • an RB contains 12 consecutive subcarriers in the frequency domain and 6 consecutive symbols in the time domain, for a total of 72 REs.
  • the number of bits carried by each RE depends on the modulation scheme.
  • the DL-RS may include cell-specific reference signals (CRS) (also sometimes called common RS) , UE-specific reference signals (UE-RS) , and channel state information reference signals (CSI-RS) .
  • CRS cell-specific reference signals
  • UE-RS UE-specific reference signals
  • CSI-RS channel state information reference signals
  • FIG. 2A illustrates CRS for antenna ports 0, 1, 2, and 3 (indicated as R0, R1, R2, and R3, respectively) , UE-RS for antenna port 5 (indicated as R5) , and CSI-RS for antenna port 15 (indicated as R) .
  • FIG. 2B illustrates an example of various channels within a DL subframe of a frame.
  • the physical control format indicator channel (PCFICH) is within symbol 0 of slot 0, and carries a control format indicator (CFI) that indicates whether the physical downlink control channel (PDCCH) occupies 1, 2, or 3 symbols (FIG. 2B illustrates a PDCCH that occupies 3 symbols) .
  • the PDCCH carries downlink control information (DCI) within one or more control channel elements (CCEs) , each CCE including nine RE groups (REGs) , each REG including four consecutive REs in an OFDM symbol.
  • DCI downlink control information
  • CCEs control channel elements
  • each CCE including nine RE groups (REGs) , each REG including four consecutive REs in an OFDM symbol.
  • a UE may be configured with a UE-specific enhanced PDCCH (ePDCCH) that also carries DCI.
  • the ePDCCH may have 2, 4, or 8 RB pairs (FIG.
  • the physical hybrid automatic repeat request (ARQ) (HARQ) indicator channel (PHICH) is also within symbol 0 of slot 0 and carries the HARQ indicator (HI) that indicates HARQ acknowledgement (ACK) /negative ACK (NACK) feedback based on the physical uplink shared channel (PUSCH) .
  • the primary synchronization channel (PSCH) is within symbol 6 of slot 0 within subframes 0 and 5 of a frame, and carries a primary synchronization signal (PSS) that is used by a UE to determine subframe timing and a physical layer identity.
  • PSS primary synchronization signal
  • the secondary synchronization channel is within symbol 5 of slot 0 within subframes 0 and 5 of a frame, and carries a secondary synchronization signal (SSS) that is used by a UE to determine a physical layer cell identity group number. Based on the physical layer identity and the physical layer cell identity group number, the UE can determine a physical cell identifier (PCI) . Based on the PCI, the UE can determine the locations of the aforementioned DL-RS.
  • the physical broadcast channel (PBCH) is within symbols 0, 1, 2, 3 of slot 1 of subframe 0 of a frame, and carries a master information block (MIB) .
  • the MIB provides a number of RBs in the DL system bandwidth, a PHICH configuration, and a system frame number (SFN) .
  • the physical downlink shared channel (PDSCH) carries user data, broadcast system information not transmitted through the PBCH such as system information blocks (SIBs) , and paging messages.
  • SIBs system information blocks
  • some of the REs carry demodulation reference signals (DM-RS) for channel estimation at the eNB.
  • the UE may additionally transmit sounding reference signals (SRS) in the last symbol of a subframe.
  • SRS sounding reference signals
  • the SRS may have a comb structure, and a UE may transmit SRS on one of the combs.
  • the SRS may be used by an eNB for channel quality estimation to enable frequency-dependent scheduling on the UL.
  • FIG. 2D illustrates an example of various channels within an UL subframe of a frame.
  • a physical random access channel (PRACH) may be within one or more subframes within a frame based on the PRACH configuration.
  • the PRACH may include six consecutive RB pairs within a subframe.
  • PRACH physical random access channel
  • the PRACH allows the UE to perform initial system access and achieve UL synchronization.
  • a physical uplink control channel may be located on edges of the UL system bandwidth.
  • the PUCCH carries uplink control information (UCI) , such as scheduling requests, a channel quality indicator (CQI) , a precoding matrix indicator (PMI) , a rank indicator (RI) , and HARQ ACK/NACK feedback.
  • UCI uplink control information
  • the PUSCH carries data, and may additionally be used to carry a buffer status report (BSR) , a power headroom report (PHR) , and/or UCI.
  • BSR buffer status report
  • PHR power headroom report
  • FIG. 3 is a block diagram of an eNB 310 in communication with a UE 350 in an access network.
  • IP packets from the EPC 160 may be provided to a controller/processor 375.
  • the controller/processor 375 implements layer 3 and layer 2 functionality.
  • Layer 3 includes a radio resource control (RRC) layer
  • layer 2 includes a packet data convergence protocol (PDCP) layer, a radio link control (RLC) layer, and a medium access control (MAC) layer.
  • RRC radio resource control
  • PDCP packet data convergence protocol
  • RLC radio link control
  • MAC medium access control
  • the coded and modulated symbols may then be split into parallel streams.
  • Each stream may then be mapped to an OFDM subcarrier, multiplexed with a reference signal (e.g., pilot) in the time and/or frequency domain, and then combined together using an Inverse Fast Fourier Transform (IFFT) to produce a physical channel carrying a time domain OFDM symbol stream.
  • IFFT Inverse Fast Fourier Transform
  • the OFDM stream is spatially precoded to produce multiple spatial streams.
  • Channel estimates from a channel estimator 374 may be used to determine the coding and modulation scheme, as well as for spatial processing.
  • the channel estimate may be derived from a reference signal and/or channel condition feedback transmitted by the UE 350.
  • Each spatial stream may then be provided to a different antenna 320 via a separate transmitter 318TX.
  • Each transmitter 318TX may modulate an RF carrier with a respective spatial stream for transmission.
  • the frequency domain signal comprises a separate OFDM symbol stream for each subcarrier of the OFDM signal.
  • the symbols on each subcarrier, and the reference signal, are recovered and demodulated by determining the most likely signal constellation points transmitted by the eNB 310. These soft decisions may be based on channel estimates computed by the channel estimator 358.
  • the soft decisions are then decoded and deinterleaved to recover the data and control signals that were originally transmitted by the eNB 310 on the physical channel.
  • the data and control signals are then provided to the controller/processor 359, which implements layer 3 and layer 2 functionality.
  • the controller/processor 359 provides RRC layer functionality associated with system information (e.g., MIB, SIBs) acquisition, RRC connections, and measurement reporting; PDCP layer functionality associated with header compression /decompression, and security (ciphering, deciphering, integrity protection, integrity verification) ; RLC layer functionality associated with the transfer of upper layer PDUs, error correction through ARQ, concatenation, segmentation, and reassembly of RLC SDUs, re-segmentation of RLC data PDUs, and reordering of RLC data PDUs; and MAC layer functionality associated with mapping between logical channels and transport channels, multiplexing of MAC SDUs onto TBs, demultiplexing of MAC SDUs from TBs, scheduling information reporting, error correction through HARQ, priority handling, and logical channel prioritization.
  • RRC layer functionality associated with system information (e.g., MIB, SIBs) acquisition, RRC connections, and measurement reporting
  • PDCP layer functionality associated with
  • Channel estimates derived by a channel estimator 358 from a reference signal or feedback transmitted by the eNB 310 may be used by the TX processor 368 to select the appropriate coding and modulation schemes, and to facilitate spatial processing.
  • the spatial streams generated by the TX processor 368 may be provided to different antenna 352 via separate transmitters 354TX. Each transmitter 354TX may modulate an RF carrier with a respective spatial stream for transmission.
  • the UL transmission is processed at the eNB 310 in a manner similar to that described in connection with the receiver function at the UE 350.
  • Each receiver 318RX receives a signal through its respective antenna 320.
  • Each receiver 318RX recovers information modulated onto an RF carrier and provides the information to a RX processor 370.
  • the controller/processor 375 can be associated with a memory 376 that stores program codes and data.
  • the memory 376 may be referred to as a computer-readable medium.
  • the controller/processor 375 provides demultiplexing between transport and logical channels, packet reassembly, deciphering, header decompression, control signal processing to recover IP packets from the UE 350. IP packets from the controller/processor 375 may be provided to the EPC 160.
  • the controller/processor 375 is also responsible for error detection using an ACK and/or NACK protocol to support HARQ operations.
  • Each eNB in an MBSFN area synchronously transmits the same eMBMS control information and data.
  • Each area may support broadcast, multicast, and unicast services.
  • a unicast service is a service intended for a specific user, e.g., a voice call.
  • a multicast service is a service that may be received by a group of users, e.g., a subscription video service.
  • a broadcast service is a service that may be received by all users, e.g., a news broadcast.
  • the first MBSFN area may support a first eMBMS broadcast service, such as by providing a particular news broadcast to UE 425.
  • the second MBSFN area may support a second eMBMS broadcast service, such as by providing a different news broadcast to UE 420.
  • FIG. 4B is a diagram 430 illustrating an example of an eMBMS channel configuration in an MBSFN.
  • each MBSFN area supports one or more physical multicast channels (PMCH) (e.g., 15 PMCHs) .
  • PMCH physical multicast channels
  • Each PMCH corresponds to an MCH.
  • Each MCH can multiplex a plurality (e.g., 29) of multicast logical channels.
  • Each MBSFN area may have one multicast control channel (MCCH) .
  • MCCH multicast control channel
  • one MCH may multiplex one MCCH and a plurality of multicast traffic channels (MTCHs) and the remaining MCHs may multiplex a plurality of MTCHs.
  • MTCHs multicast traffic channels
  • a UE can camp on an LTE cell to discover the availability of eMBMS service access and a corresponding access stratum configuration. Initially, the UE may acquire a SIB 13 (SIB13) . Subsequently, based on the SIB13, the UE may acquire an MBSFN Area Configuration message on an MCCH. Subsequently, based on the MBSFN Area Configuration message, the UE may acquire an MSI MAC control element.
  • SIB13 SIB 13
  • the SIB13 may include (1) an MBSFN area identifier of each MBSFN area supported by the cell; (2) information for acquiring the MCCH such as an MCCH repetition period (e.g., 32, 64, ..., 256 frames) , an MCCH offset (e.g., 0, 1, ..., 10 frames) , an MCCH modification period (e.g., 512, 1024 frames) , a signaling modulation and coding scheme (MCS) , subframe allocation information indicating which subframes of the radio frame as indicated by repetition period and offset can transmit MCCH; and (3) an MCCH change notification configuration.
  • MCS signaling modulation and coding scheme
  • the MBSFN Area Configuration message may indicate (1) a temporary mobile group identity (TMGI) and an optional session identifier of each MTCH identified by a logical channel identifier within the PMCH, and (2) allocated resources (i.e., radio frames and subframes) for transmitting each PMCH of the MBSFN area and the allocation period (e.g., 4, 8, ..., 256 frames) of the allocated resources for all the PMCHs in the area, and (3) an MCH scheduling period (MSP) (e.g., 8, 16, 32, ..., or 1024 radio frames) over which the MSI MAC control element is transmitted.
  • TMGI temporary mobile group identity
  • MSP MCH scheduling period
  • FIG. 4C is a diagram 440 illustrating the format of an MSI MAC control element.
  • the MSI MAC control element may be sent once each MSP.
  • the MSI MAC control element may be sent in the first subframe of each scheduling period of the PMCH.
  • the MSI MAC control element can indicate the stop frame and subframe of each MTCH within the PMCH.
  • a logical channel identifier (LCID) field (e.g., LCID 1, LCID 2, ..., LCID n) may indicate a logical channel identifier of the MTCH.
  • a Stop MTCH field (e.g., Stop MTCH 1, Stop MTCH 2, ..., Stop MTCH n) may indicate the last subframe carrying the MTCH corresponding to the particular LCID.
  • FIG. 5 is a diagram of a wireless communications system.
  • the base station 502 and the UE 504 may be configured for communication according to a single-cell point-to-multipoint (SC-PTM) configuration, which may allow transmission of broadcast content from the base station 502 to a group of UEs, including the UE 504.
  • SC-PTM single-cell point-to-multipoint
  • the base station 502 may determine a group that includes the UE 504, and the group may be associated with a group radio network temporary identifier (G-RNTI) .
  • the G-RNTI may be used for scrambling the downlink control information (DCI) , such as to indicate a bandwidth allocation of transmitting broadcast service.
  • DCI downlink control information
  • the base station 502 may determine a DRX configuration for a G-RNTI, for example, so that a group of UEs may wake up at the same time to receive broadcast content.
  • the base station 502 may transmit, to the UE 504, information 540 associated with the DRX configuration.
  • This information 540 may include at least a default duration of an on-timer associated with the on-cycle of the UE 504 and a default duration of an inactivity-timer.
  • a single-cell multicast traffic channel may carry the information 540.
  • the SC-MTCH may further carry the G-RNTI. Therefore, the UE 504 may be configured to determine the G-RNTI for the UE 504 by decoding data carried on the SC-MTCH.
  • a service that the UE 504 wants to receive is granted by a downlink control information (DCI) which is scrambled using the G-RNTI.
  • DCI downlink control information
  • the UE 504 may receive broadcast content from the base station 502, but may be required to wait for both the on-timer and the inactivity-timer to expire before the UE 504 may enter the sleep-cycle of a DRX configuration, even after the broadcast content has ended (i.e., the base station 502 has no further broadcast content to transmit to the UE 504) . Consequently, the UE 504 may be required to remain in an on-cycle even after data transmission to the UE 504 has ended.
  • the base station 502 may be configured to may be configured to cause the UE 504 to transition to the sleep-cycle of the DRX configuration prior to expiration of one or more timers associated with the DRX configuration at the UE 504.
  • the UE 504 may initiate 520 an on-timer in response to waking from the sleep-cycle of the DRX configuration.
  • the on-cycle of the UE 504 may be started, during which time the UE 504 may receive broadcast content from the base station 502.
  • the base station 502 may transmit, to the UE 504, an initial portion 542 of broadcast content during an the cycle of the DRX configuration.
  • the UE 504 may receive the initial portion 542 of the broadcast content and may initiate 522 the inactivity timer in response to the reception of the initial portion.
  • the base station 502 may determine that the subsequent portion 544 (e.g., including at least a last packet) defines the entire broadcast content and therefore the UE 504 should be allowed to enter a sleep-cycle even though the on-timer and/or the inactivity-timer at the UE 504 have not yet expired. Accordingly, the base station 502 may transmit, to the UE 504, a first broadcast end command 546 that is intended to cause the UE 504 to transition to the sleep-cycle of the DRX configuration prior to expiration of the on-timer default duration and the inactivity-timer default duration.
  • a first broadcast end command 546 that is intended to cause the UE 504 to transition to the sleep-cycle of the DRX configuration prior to expiration of the on-timer default duration and the inactivity-timer default duration.
  • the UE 504 may receive the subsequent portion 544 of the broadcast content and the broadcast end command 546.
  • the UE 504 may initiate 524 the sleep-cycle prior to the expiration of the on-timer and inactivity-timer default durations based on the broadcast end command 546.
  • FIG 6 illustrates a wireless communications environment 600.
  • the wireless communications environment 600 may be an aspect of the wireless communications environment 500.
  • SC-PTM may be an alternative to eMBMS broadcast.
  • SC-PTM may be used for mission-critical push-to-talk (MCPTT) , evolved machine-type communication (eMTC) , and or vehicle-to-entity (V2X) (e.g., V2V) .
  • MCPTT mission-critical push-to-talk
  • eMTC evolved machine-type communication
  • V2X vehicle-to-entity
  • the base station 602 may employ an SC-PTM configuration in the cell 610.
  • the base station 602 may determine a G-RNTI for the UEs 604, 606.
  • the base station 602 may provide the G-RNTI to the UEs 604, 606, and use the G-RNTI to scramble the downlink control information (DCI) that can allocate bandwidth to transmit broadcast content intended for the UEs 604, 606.
  • DCI down
  • the PDSCH 642 may be used to broadcast data and control information to a group of UEs 604, 606.
  • Data of specific service may be sent on the PDSCH using the G-RNTI and control information may be sent using a single-cell radio network temporary identifier (SC-RNTI) .
  • SC-RNTI single-cell radio network temporary identifier
  • FIG. 7 is a call flow diagram of a method 700 of wireless communication.
  • a UE 704 may determine a service of interest to the UE 704.
  • the UE 704 may indicate this service to the base station 702 using a TMGI.
  • the UE 704 may transmit, to the base station 702, an MBMS interest indication 722 that includes a TMGI.
  • the base station 702 may transmit the SC-MCCH 726 and, based on the SIB20 724, the UE 704 may receive the SC-MCCH 726.
  • the SC-MCCH 726 may include at least an SC-PTM configuration message. Further, the SC-MCCH 726 may indicate available TMGIs and how to receive the SC-MTCH 728. From the SC-MCCH 726, the UE 704 determine at least the G-RNTI, based on which the UE 704 may receive the SC-MTCH 728.
  • the SC-MTCH may use DRX, for example, to save power at the UE 704.
  • a DRX configuration for an SC-MTCH may vary for different TMGIs (e.g., different services use different reception cycles) .
  • the UE 704 may determine a DRX configuration for a TMGI of interest based on the SC-MTCH 728. For example, the UE 704 may determine default durations for an on-timer and an inactivity-timer, as well as an offset from the beginning of a DRX cycle that indicates when broadcast content associated with the TMGI is to begin.
  • the on-timer and the inactivity-timer are defined in subframes of the PDCCH (psf) , while the offset is defined in subframes (sf) .
  • FIG. 8 is a diagram of a wireless communications system.
  • a DRX configuration may be implemented by the UE 504.
  • a DRX configuration includes cycles 808, each of which may be 320 milliseconds.
  • the UE 504 may be in an on-state 810. While in the on-state 810, the UE 504 may receive data from the base station 502. While not in the on-state 810, the UE 504 may be in the sleep-state.
  • Each portion of the broadcast content may cause the UE 1004 to restart the inactivity-timer 804.
  • the UE 1004 may be configured to remain in the on-state 810 until expiration of a default duration of the inactivity- timer 804.
  • the UE 1004 may be further configured to transition to the sleep-state before expiration of the default duration of the inactivity-timer 804 (and the on-timer 802) when the UE 1004 receives a broadcast end command, here a MAC CE that includes a DRX command (e.g., as described with respect to Table 1, the first broadcast end command 526) .
  • the UE 1004 may receive a MAC PDU 1024 carried on the SC-MTCH.
  • the MAC PDU 1024 may include SC-MTCH data (e.g., broadcast content) and, optionally, padding (e.g., if the broadcast content does not consume the entire payload of the MAC PDU) .
  • SC-MTCH data e.g., broadcast content
  • padding e.g., if the broadcast content does not consume the entire payload of the MAC PDU
  • the MAC PDU 1024 may carry the last portion of broadcast content, such that there is no further broadcast content of a service to transmit from the base station 1002. Therefore, the base station 1002 may indicate, to the UE 1004, that the MAC PDU 1024 carries the end of the broadcast content by including a DRX command.
  • the UE 1004 may be unable to decode the next additional MAC PDU 1026 following the first MAC PDU 1024, but the base station may transmit a plurality of additional MAC PDUs 1026, 1028.
  • the UE 1004 may receive and successfully decode the last MAC PDU 1028 that carries the DRX command.
  • the UE 1004 may transition 1050 to the sleep-state, including stopping the inactivity-timer 804 (and the on-timer 802) .
  • FIG. 11 illustrates different aspects for signaling a broadcast end command to a UE.
  • the broadcast end command may be signaled by a DRX command, which may be a MAC CE.
  • a first MAC PDU 1100 may include a first MAC CE 1102 that indicates the DRX command.
  • the first MAC CE 1102 may indicate the DRX command by inclusion of a predefined value (e.g., 11110) in the LCID of the first MAC CE 1102.
  • the first MAC PDU 1100 may include a second MAC subheader 1104 (e.g., LCID 11001) that indicates the first MAC PDU 1100 carries SC-MTCH and/or SC-MCCH in a payload 1108 of the first MAC PDU 1100.
  • the SC-MTCH data may not consume the entire payload portion of the first MAC PDU 1100 and, therefore, the remainder of the payload 1108 may include padding.
  • the first MAC PDU 1100 may include a third MAC subheader 1106 (e.g., LCID 11111) that indicates the first MAC PDU 1100 carries padding in a payload 1108 of the first MAC PDU 1100.
  • a second MAC PDU 1120 may include a second MAC CE 1122 that indicates the DRX command.
  • the second MAC CE 1122 may indicate the DRX command by inclusion of a predefined value (e.g., 11110) in the LCID.
  • the second MAC PDU 1120 may include a second MAC subheader 1124 (e.g., LCID 11001) that indicates the second MAC PDU 1120 carries SC-MTCH and/or SC-MCCH in a payload 1128 of the second MAC PDU 1120.
  • the SC-MTCH data may not consume the entire payload 1128 of the first MAC PDU 1100 and, therefore, no padding may be included or indicated in a MAC subheader.
  • a third MAC PDU 1140 may include a third MAC CE 1142 that indicates the DRX command.
  • the third MAC CE 1142 may indicate the DRX command by inclusion of a predefined value (e.g., 11110) in the LCID.
  • the third MAC PDU 1140 may include a second MAC subheader 1144 (e.g., LCID 11111) that indicates the third MAC PDU 1140 carries only padding in a payload 1148 of the third MAC PDU 1140.
  • This third MAC PDU 1140 may be used to repeatedly signal the DRX command to a UE, even after broadcast content has ended.
  • the UE may initiate an on-timer in response to waking from a sleep-cycle of a DRX configuration, and the waking from the sleep cycle may start an on-cycle of the DRX configuration.
  • the UE 504 may initiate 520 an on-timer in response to waking from a sleep-cycle of a DRX configuration.
  • the UE may receive an initial portion of broadcast content during the on-cycle of the DRX configuration.
  • the UE 504 may receive the initial portion 542 of the broadcast content during the on-cycle of the DRX configuration.
  • the UE may initiate an inactivity-timer in response to the reception of the initial portion.
  • the on-timer and the inactivity-timer may each have a respective default duration (which may not be the same) .
  • the UE 504 may initiate 522 the inactivity-timer in response to reception of the initial portion 542.
  • the UE may receive a subsequent portion of the broadcast content and a broadcast end command.
  • the subsequent portion of the broadcast content and the initial portion may define the entire broadcast content.
  • the broadcast end command may indicate, to the UE, that there is no more broadcast content to be received during the on-cycle.
  • the UE 504 may receive the subsequent portion 544 of the broadcast content and the broadcast end command 546.
  • the UE may initiate a sleep-cycle prior to the expiration of the on-timer and the inactivity-timer default durations based on the broadcast end command.
  • the UE 504 may initiate 524 the sleep-cycle prior to the expiration of the on-timer and the inactivity-timer default durations based on the broadcast end command.
  • FIG. 13 is a flow diagram illustrating a method 1300 of wireless communication.
  • the method 1300 may be performed by a base station (e.g., the base station 502, the apparatus 1602/1602’ ) .
  • a base station e.g., the base station 502, the apparatus 1602/1602’
  • the base station may determine a G-RNTI associated with a group that includes a UE.
  • the G-RNTI may be associated with a service that is of interest to the UE and may be associated with a TMGI.
  • the base station 502 may determine a G-RNTI associated with a group that includes the UE 504.
  • the base station may transmit an indication of the G-RNTI to the UE.
  • the indication may be carried on an SC-MCCH.
  • the base station 502 may transmit an indication of the G-RNTI to the UE 504.
  • the base station may transmit, to the UE, information associated with a DRX configuration.
  • the information may include at least a default duration of an on-timer associated with an on-cycle of the UE and a default duration of an inactivity-timer.
  • the base station 502 may transmit, to the UE 504, the information 540 associated with a DRX configuration.
  • the base station may transmit, to the UE a subsequent portion of the broadcast content.
  • the initial portion and the subsequent portion may define the entire broadcast content.
  • the base station may no additional portions of broadcast content to transmit to the UE in connection with a service.
  • the base station 502 may transmit, to the UE 504, the subsequent portion 544 of the broadcast content.
  • the base station may repeatedly transmit the broadcast end command.
  • the base station may transmit, to the UE, at least a second broadcast end command after transmission of the first broadcast end command.
  • the base station 502 may transmit, to the UE 504, at least a second broadcast end command after transmission of the first broadcast end command 546.
  • the apparatus 1402 may include a DRX component 1412.
  • the DRX component 1412 may be configured to receive a DRX configuration from the base station 1450.
  • the DRX component 1412 may be configured to cause the apparatus 1402 to transition between a sleep-cycle and an on-cycle based on the DRX configuration.
  • the DRX component 1412 may provide an indication to the reception component 1404 that causes the reception component to transition between a sleep-cycle and an on-cycle.
  • the initial portion of the broadcast content may be packetized as a PDU (e.g., a MAC PDU) .
  • a control component 1414 may parse the header (e.g., MAC CE) of the PDUs and determine if a packet includes data (e.g., SC-MTCH data) for the apparatus 1402. If so, the control component 1414 may indicate to the DRX component 1412 that data has been received. The DRX component 1412 may initiate the inactivity-timer in response to the indication from the control component 1414 that data has been received.
  • the control component 1414 may receive, through the reception component 1404, a PDU that includes a subheader of a MAC CE that indicates a broadcast end command (e.g., a DRX command) .
  • the broadcast end command is a MAC CE included in a MAC PDU.
  • the broadcast end command MAC CE is included in a MAC PDU that includes the subsequent portion of the broadcast content.
  • the broadcast end command MAC CE is included in a MAC PDU having a payload that is only padding.
  • the apparatus may include additional components that perform each of the blocks of the algorithm in the aforementioned flowcharts of FIG. 12. As such, each block in the aforementioned flowcharts of FIG. 12 may be performed by a component and the apparatus may include one or more of those components.
  • the components may be one or more hardware components specifically configured to carry out the stated processes/algorithm, implemented by a processor configured to perform the stated processes/algorithm, stored within a computer-readable medium for implementation by a processor, or some combination thereof.
  • FIG. 15 is a diagram 1500 illustrating an example of a hardware implementation for an apparatus 1402'employing a processing system 1514.
  • the processing system 1514 may be implemented with a bus architecture, represented generally by the bus 1524.
  • the bus 1524 may include any number of interconnecting buses and bridges depending on the specific application of the processing system 1514 and the overall design constraints.
  • the bus 1524 links together various circuits including one or more processors and/or hardware components, represented by the processor 1504, the components 1404, 1410, 1412, 1414, 1416, and the computer-readable medium /memory 1506.
  • the bus 1524 may also link various other circuits such as timing sources, peripherals, voltage regulators, and power management circuits, which are well known in the art, and therefore, will not be described any further.
  • the processing system 1514 may be coupled to a transceiver 1510.
  • the transceiver 1510 is coupled to one or more antennas 1520.
  • the transceiver 1510 provides a means for communicating with various other apparatus over a transmission medium.
  • the transceiver 1510 receives a signal from the one or more antennas 1520, extracts information from the received signal, and provides the extracted information to the processing system 1514, specifically the reception component 1404.
  • the transceiver 1510 receives information from the processing system 1514, specifically the transmission component 1410, and based on the received information, generates a signal to be applied to the one or more antennas 1520.
  • the processing system 1514 includes a processor 1504 coupled to a computer-readable medium /memory 1506.
  • the broadcast end command is a MAC CE included in a MAC PDU.
  • the broadcast end command MAC CE is included in a MAC PDU that further includes the subsequent portion of the broadcast content.
  • the broadcast end command MAC CE is included in a MAC PDU having a payload that is only padding.
  • the apparatus 1402/1402’ may further include means for determining a group radio network temporary identifier (G-RNTI) , the G-RNTI associated with a group that includes the UE.
  • G-RNTI group radio network temporary identifier
  • the broadcast content is received on a PDSCH through SC-PTM configuration.
  • the apparatus 1602 includes a DRX component 1612.
  • the DRX component 1612 may be configured to determine information associated with a DRX configuration (e.g., for a TMGI associated with the UE 1650) .
  • the information may include at least a default duration of an on-timer associated with an on-cycle of the UE and a default duration of an inactivity-timer.
  • the DRX component 1612 may cause the transmission component 1610 to transmit the information associated with the DRX configuration to the UE 1650 so that the UE 1650 will be in on-cycle when the apparatus 1602 transmits broadcast content.
  • the apparatus 1602 may include a control component 1614.
  • the control component 1614 may be configured to determine a G-RNTI associate with a group that includes the UE 1650, such as a group associated with a service that the UE 1650 would like to receive (e.g., a TMGI) .
  • the control component 1614 may cause the transmission component 1610 to transmit an indication of the G-RNTI to the UE 1650.
  • the apparatus may include a content component 1616.
  • the content component 1616 may determine broadcast content to transmit to the UE 1650.
  • the content component 1616 may cause the transmission component 1610 to transmit, to the UE 1650, an initial portion of broadcast content during the on-cycle of the DRX configuration.
  • the control component 1614 may be configured to determine that the broadcast content of current DRX cycle has been transmitted to the UE 1650 and, therefore, the UE 1650 may transition to the sleep-cycle. Therefore, the control component 1614 may cause the transmission component 1610 to transmit, to the UE 1650, a first broadcast end command.
  • the first broadcast end command may be intended to cause the UE to transition to the sleep-cycle of the DRX configuration prior to expiration of the on-timer default duration and the inactivity-timer default duration.
  • the first broadcast end command is a MAC CE included in a MAC PDU.
  • the first broadcast end command MAC CE is included in a MAC PDU that includes the subsequent portion of the broadcast content.
  • the first broadcast end command MAC CE is included in a MAC PDU having a payload that is only padding.
  • the apparatus may include additional components that perform each of the blocks of the algorithm in the aforementioned flowcharts of FIG. 13. As such, each block in the aforementioned flowcharts of FIG. 13 may be performed by a component and the apparatus may include one or more of those components.
  • the components may be one or more hardware components specifically configured to carry out the stated processes/algorithm, implemented by a processor configured to perform the stated processes/algorithm, stored within a computer-readable medium for implementation by a processor, or some combination thereof.
  • FIG. 17 is a diagram 1700 illustrating an example of a hardware implementation for an apparatus 1602'employing a processing system 1714.
  • the processing system 1714 may be implemented with a bus architecture, represented generally by the bus 1724.
  • the bus 1724 may include any number of interconnecting buses and bridges depending on the specific application of the processing system 1714 and the overall design constraints.
  • the bus 1724 links together various circuits including one or more processors and/or hardware components, represented by the processor 1704, the components 1604, 1610, 1612, 1614, 1616, and the computer-readable medium /memory 1706.
  • the bus 1724 may also link various other circuits such as timing sources, peripherals, voltage regulators, and power management circuits, which are well known in the art, and therefore, will not be described any further.
  • the processing system 1714 may be coupled to a transceiver 1710.
  • the transceiver 1710 is coupled to one or more antennas 1720.
  • the transceiver 1710 provides a means for communicating with various other apparatus over a transmission medium.
  • the transceiver 1710 receives a signal from the one or more antennas 1720, extracts information from the received signal, and provides the extracted information to the processing system 1714, specifically the reception component 1604.
  • the transceiver 1710 receives information from the processing system 1714, specifically the transmission component 1610, and based on the received information, generates a signal to be applied to the one or more antennas 1720.
  • the processing system 1714 includes a processor 1704 coupled to a computer-readable medium /memory 1706.
  • the processor 1704 is responsible for general processing, including the execution of software stored on the computer-readable medium /memory 1706.
  • the software when executed by the processor 1704, causes the processing system 1714 to perform the various functions described supra for any particular apparatus.
  • the computer-readable medium /memory 1706 may also be used for storing data that is manipulated by the processor 1704 when executing software.
  • the processing system 1714 further includes at least one of the components 1604, 1610, 1612, 1614, 1616.
  • the components may be software components running in the processor 1704, resident/stored in the computer readable medium /memory 1706, one or more hardware components coupled to the processor 1704, or some combination thereof.
  • the processing system 1714 may be a component of the eNB 310 and may include the memory 376 and/or at least one of the TX processor 316, the RX processor 370, and the controller/processor 375.
  • the apparatus 1602/1602'for wireless communication includes means for means for transmitting, to a UE, information associated with a DRX configuration, the information including at least a default duration of an on-timer associated with an on-cycle of the UE and a default duration of an inactivity-timer.
  • the apparatus 1602/1602' may further include means for transmitting, to the UE, an initial portion of broadcast content during the on-cycle of the DRX configuration.
  • the apparatus 1602/1602' may further include means for transmitting, to the UE, a subsequent portion of the broadcast content, wherein the initial portion and the subsequent portion define the entire broadcast content.
  • the apparatus 1602/1602' may further include means for transmitting, to the UE, a first broadcast end command, wherein the first broadcast end command is intended to cause the UE to transition to a sleep-cycle of the DRX configuration prior to expiration of the on-timer default duration and the inactivity-timer default duration.
  • the apparatus 1602/1602' may further include means for determining a G-RNTI, the G-RNTI associated with a group that includes the UE.
  • the apparatus 1602/1602' may further include means for transmitting an indication of the G-RNTI to the UE.
  • the broadcast content is transmitted on a PDSCH through SC-PTM configuration.
  • the apparatus 1602/1602' may further include means for transmitting at least a second broadcast end command after the transmission of the first broadcast end command.
  • the first broadcast end command is transmitted in a first subframe and the second broadcast end command is transmitted in a second subframe that immediately follows the first subframe.
  • the first broadcast end command is transmitted in a first subframe and the second broadcast end command is transmitted in a second subframe, wherein at least one other subframe separates the first subframe and the second subframe.
  • the aforementioned means may be one or more of the aforementioned components of the apparatus 1602 and/or the processing system 1714 of the apparatus 1602'configured to perform the functions recited by the aforementioned means.
  • the processing system 1714 may include the TX Processor 316, the RX Processor 370, and the controller/processor 375.
  • the aforementioned means may be the TX Processor 316, the RX Processor 370, and the controller/processor 375 configured to perform the functions recited by the aforementioned means.
  • Combinations such as “at least one of A, B, or C, ” “one or more of A, B, or C, ” “at least one of A, B, and C, ” “one or more of A, B, and C, ” and “A, B, C, or any combination thereof” include any combination of A, B, and/or C, and may include multiples of A, multiples of B, or multiples of C.
  • combinations such as “at least one of A, B, or C, ” “one or more of A, B, or C, ” “at least one of A, B, and C, ” “one or more of A, B, and C, ” and “A, B, C, or any combination thereof” may be A only, B only, C only, A and B, A and C, B and C, or A and B and C, where any such combinations may contain one or more member or members of A, B, or C.

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Abstract

Selon l'invention, un premier appareil peut initier un temporisateur d'activité en réponse à un réveil depuis un cycle de sommeil d'une configuration de réception discontinue (DRX), le réveil depuis le cycle de veille démarrant un cycle actif de la configuration DRX. Le premier appareil peut recevoir une partie initiale d'un contenu de diffusion durant le cycle actif de la configuration DRX. Le premier appareil peut initier un temporisateur d'inactivité en réponse à la réception, le temporisateur d'activité et le temporisateur d'inactivité ayant chacun des durées par défaut. Le premier appareil peut recevoir une partie consécutive du contenu de diffusion et une commande d'extrémité de diffusion, la partie initiale et la partie consécutive définissant l'ensemble du contenu de diffusion. Le premier appareil peut initier un cycle de sommeil avant l'expiration des durées par défaut du temporisateur d'activité et du temporisateur d'inactivité sur la base de la commande de l'extrémité de diffusion.
PCT/CN2016/101224 2016-09-30 2016-09-30 Commande drx dans des environnements sc-ptm WO2018058586A1 (fr)

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PCT/CN2016/101224 WO2018058586A1 (fr) 2016-09-30 2016-09-30 Commande drx dans des environnements sc-ptm

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PCT/CN2016/101224 WO2018058586A1 (fr) 2016-09-30 2016-09-30 Commande drx dans des environnements sc-ptm

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CN112788546A (zh) * 2019-11-05 2021-05-11 成都鼎桥通信技术有限公司 一种B-TrunC系统中优化控制单元指示信息的方法和设备
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CN111373825A (zh) * 2018-07-25 2020-07-03 联发科技股份有限公司 针对ue功率节省的唤醒信号操作
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