WO2014109769A1 - Gestion de signalisation de commande améliorée - Google Patents

Gestion de signalisation de commande améliorée Download PDF

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Publication number
WO2014109769A1
WO2014109769A1 PCT/US2013/021433 US2013021433W WO2014109769A1 WO 2014109769 A1 WO2014109769 A1 WO 2014109769A1 US 2013021433 W US2013021433 W US 2013021433W WO 2014109769 A1 WO2014109769 A1 WO 2014109769A1
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WO
WIPO (PCT)
Prior art keywords
transmission
pdcch
inactivity timer
processor
computer program
Prior art date
Application number
PCT/US2013/021433
Other languages
English (en)
Inventor
Petteri LUNDÉN
Elena Virtej
Esa Malkamäki
Juha S. Korhonen
Original Assignee
Nokia Corporation
Nokia, 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
Application filed by Nokia Corporation, Nokia, Inc filed Critical Nokia Corporation
Priority to PCT/US2013/021433 priority Critical patent/WO2014109769A1/fr
Publication of WO2014109769A1 publication Critical patent/WO2014109769A1/fr

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Classifications

    • 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
    • H04W52/0209—Power saving arrangements in terminal devices
    • H04W52/0225—Power saving arrangements in terminal devices using monitoring of external events, e.g. the presence of a signal
    • H04W52/0235—Power saving arrangements in terminal devices using monitoring of external events, e.g. the presence of a signal where the received signal is a power saving command
    • 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

  • Embodiments of the invention relate to wireless communications networks, such as the Universal Mobile Telecommunications System (UMTS) Terrestrial Radio Access Network (UTRAN) Long Term Evolution (LTE) and Evolved UTRAN (E-UTRAN).
  • UMTS Universal Mobile Telecommunications System
  • UTRAN Terrestrial Radio Access Network
  • LTE Long Term Evolution
  • E-UTRAN Evolved UTRAN
  • Universal Mobile Telecommunications System (UMTS) Terrestrial Radio Access Network (UTRAN) refers to a communications network including base stations, or Node Bs (or enhanced Node Bs (eNBs) in LTE or E-UTRAN), and radio network controllers (RNC).
  • UTRAN allows for connectivity between the user equipment (UE) and the core network.
  • the RNC provides control functionalities for one or more Node Bs.
  • the RNC and its corresponding Node Bs are called the Radio Network Subsystem (RNS).
  • RNS Radio Network Subsystem
  • LTE Long Term Evolution
  • E-UTRAN refers to improvements of the UMTS through improved efficiency and services, lower costs, and use of new spectrum opportunities.
  • LTE is a 3GPP standard that provides for uplink peak rates of at least 50 megabits per second (Mbps) and downlink peak rates of at least 100 Mbps.
  • LTE supports scalable carrier bandwidths from 20 MHz down to 1.4 MHz and supports both Frequency Division Duplexing (FDD) and Time Division Duplexing (TDD).
  • FDD Frequency Division Duplexing
  • TDD Time Division Duplexing
  • LTE is also expected to improve spectral efficiency in 3G networks, allowing carriers to provide more data and voice services over a given bandwidth. Therefore, LTE is designed to fulfill future needs for high-speed data and media transport in addition to high-capacity voice support. Advantages of LTE include high throughput, low latency, FDD and TDD support in the same platform, an improved end-user experience, and a simple architecture resulting in low operating costs. Further information on the LTE features may be found in TS 36.300 v. 11.1.0 (LTE Stage 2), which is incorporated by reference in its entirety.
  • LTE transmissions on the physical uplink (UL) control and shared channels are time aligned to preserve orthogonality of PUSCH demodulation reference and PUCCH signals of the different UEs in the OFDMA system.
  • the random access procedure is used for setting the UL timing.
  • UE transmits a preamble on the random access channel (RACH), the preamble timing being aligned with the received DL timing.
  • RACH random access channel
  • UE receives a timing advance (TA) command that indicates how much earlier the UL transmissions must be started relative to the received DL signal.
  • TA timing advance
  • UE may receive TA updates that correct small timing drifts due to UE movement or radio channel changes.
  • the validity of UE's TA value is controlled with a time alignment timer (TAT).
  • TAT time alignment timer
  • UE resets its TAT when it receives the initial or updating TA command, and if the TAT expires, UE considers its UL unsynchronized.
  • One embodiment is directed to a method including receiving, by a user equipment, a physical downlink control channel (PDCCH) transmission for scheduling a new uplink (UL) or downlink (DL) transmission.
  • the physical downlink control channel (PDCCH) transmission comprises an indication that a discontinuous reception (DRX) inactivity timer should not be started or restarted.
  • DRX discontinuous reception
  • the apparatus includes at least one processor, and at least one memory including computer program code.
  • the at least one memory and computer program code with the at least one processor, cause the apparatus at least to receive a physical downlink control channel (PDCCH) transmission for scheduling a new uplink (UL) or downlink (DL) transmission.
  • the physical downlink control channel (PDCCH) transmission comprises an indication that a discontinuous reception (DRX) inactivity timer should not be started or restarted.
  • DRX discontinuous reception
  • Another embodiment is directed to a computer program embodied on a computer readable medium.
  • the computer program is configured to control a processor to perform a process.
  • the process includes receiving a physical downlink control channel (PDCCH) transmission for scheduling a new uplink (UL) or downlink (DL) transmission.
  • the physical downlink control channel (PDCCH) transmission comprises an indication that a discontinuous reception (DRX) inactivity timer should not be started or restarted.
  • DRX discontinuous reception
  • Another embodiment is directed to an apparatus including means for receiving a physical downlink control channel (PDCCH) transmission for scheduling a new uplink (UL) or downlink (DL) transmission.
  • the physical downlink control channel (PDCCH) transmission comprises an indication that a discontinuous reception (DRX) inactivity timer should not be started or restarted.
  • DRX discontinuous reception
  • Another embodiment is directed to a method including transmitting, by a network node, a physical downlink control channel (PDCCH) transmission for scheduling a new uplink (UL) or downlink (DL) transmission to a user equipment.
  • the physical downlink control channel (PDCCH) transmission comprises an indication that a discontinuous reception (DRX) inactivity timer should not be started or restarted by the user equipment.
  • DRX discontinuous reception
  • the apparatus includes at least one processor, and at least one memory including computer program code.
  • the at least one memory and computer program code with the at least one processor, cause the apparatus at least to transmit a physical downlink control channel (PDCCH) transmission for scheduling a new uplink (UL) or downlink (DL) transmission to a user equipment.
  • the physical downlink control channel (PDCCH) transmission comprises an indication that a discontinuous reception (DRX) inactivity timer should not be started or restarted by the user equipment.
  • DRX discontinuous reception
  • Another embodiment is directed to a computer program embodied on a computer readable medium.
  • the computer program is configured to control a processor to perform a process.
  • the process includes transmitting a physical downlink control channel (PDCCH) transmission for scheduling a new uplink (UL) or downlink (DL) transmission to a user equipment.
  • the physical downlink control channel (PDCCH) transmission comprises an indication that a discontinuous reception (DRX) inactivity timer should not be started or restarted by the user equipment.
  • DRX discontinuous reception
  • Another embodiment is directed to an apparatus including means for transmitting a physical downlink control channel (PDCCH) transmission for scheduling a new uplink (UL) or downlink (DL) transmission to a user equipment.
  • the physical downlink control channel (PDCCH) transmission comprises an indication that a discontinuous reception (DRX) inactivity timer should not be started or restarted by the user equipment.
  • DRX discontinuous reception
  • Another embodiment is directed to a method.
  • the method includes receiving a new medium access control (MAC) control element (CE).
  • the new medium access control (MAC) control element (CE) stops the inactivity timer, does not stop on-duration, and does not start short DRX cycle.
  • Another embodiment includes an apparatus.
  • the apparatus includes at least one processor, and at least one memory including computer program code.
  • the at least one memory and computer program code with the at least one processor, cause the apparatus at least to receive a new medium access control (MAC) control element (CE).
  • the new medium access control (MAC) control element (CE) stops the inactivity timer, does not stop on-duration, and does not start short DRX cycle.
  • Another embodiment is directed to an apparatus including means for receiving a new medium access control (MAC) control element (CE).
  • the new medium access control (MAC) control element (CE) stops the inactivity timer, does not stop on-duration, and does not start short DRX cycle.
  • Another embodiment is directed to a computer program embodied on a computer readable medium.
  • the computer program is configured to control a processor to perform a process.
  • the process includes receiving a new medium access control (MAC) control element (CE).
  • the new medium access control (MAC) control element (CE) stops the inactivity timer, does not stop on-duration, and does not start short DRX cycle.
  • MAC medium access control
  • FIG. 1 illustrates an example of a DRX cycle according to one embodiment
  • FIG. 2 illustrates an example of a DRX cycle according to another embodiment
  • FIG. 3a illustrates an example of an apparatus according to one embodiment
  • FIG. 3b illustrates an example of an apparatus according to another embodiment
  • FIG. 4 illustrates a flow diagram of a method according to one embodiment
  • FIG. 5 illustrates a flow diagram of a method according to another embodiment.
  • Embodiments of the invention may relate generally to E-UTRAN and, in some embodiments, relate to E-UTRAN UE power consumption, UE scheduling and physical downlink control channel (PDCCH) monitoring.
  • E-UTRAN UE power consumption
  • UE scheduling and physical downlink control channel (PDCCH) monitoring For UEs, such as smart phones, that have background traffic of the type that is always on, the UE power consumption is sought to be minimized. Therefore, any unnecessary traffic should be avoided, especially because any new uplink (UL) or downlink (DL) transmission on a physical uplink shared channel (PUSCH)/physical downlink shared channel (PDSCH) starts a discontinuous reception (DRX) inactivity timer. Similarly, unnecessary starting or restarting of DRX inactivity timer should be avoided.
  • PUSCH physical uplink shared channel
  • PDSCH physical downlink shared channel
  • DRX discontinuous reception
  • the UE may have a time alignment timer (TAT) running. This TAT is linked to the uplink timing advance validity.
  • TAT may be started or reset every time the UE receives a timing advance (TA) value from the eNB.
  • the UE may also be configured with various uplink resources, such as periodic channel quality indicator (CQI), sounding reference symbol (SRS), scheduling request (SR), etc. These allocations may only be valid as long as the UE has a valid TAT. When the TAT expires, the UE will release these resources and will need to be reconfigured with a new resource by the RRC.
  • CQI periodic channel quality indicator
  • SRS sounding reference symbol
  • SR scheduling request
  • TA commands need to be continuously sent to the UE.
  • a TA command medium access control (MAC) control element (CE) is sent to the UE on PDSCH, the UE starts the DRX inactivity timer (e.g. drx-InactivityTimer) and, when the DRX inactivity timer expires, a short cycle timer (e.g. drxShortCycleTimer) is started if short DRX cycle is configured.
  • Fig. 1 illustrates an example of what occurs when a TA command medium access control (MAC) control element (CE) is received on PDSCH.
  • the DRX inactivity timer is started and when it expires, the UE enters short DRX cycle (e.g., for 3 short cycles).
  • a problem of the system of Figure 1 is that there is no proper separation of control signaling and user data when it comes to DRX operation. Starting the inactivity timer and entering short DRX cycle are reasonable when user data is transmitted because it is then probable that transmissions will continue after the first PUSCH/PDSCH transmission. However, such continuation of transmissions is not typically needed for control signaling. For example, transmitting just a MAC CE without user data (e.g., TA commands) will start the UE's DRX inactivity timer and, when that expires, the short cycle timer is started although no further PDSCH transmission is expected. The unnecessary monitoring of the PDCCH causes unnecessary power consumption. Furthermore, the UE may send a message in the UL (e.g., CSI/CQI) so that the eNB can measure the UL timing or otherwise for purposes of reporting channel state/quality. These UL transmissions also cause extra power consumption.
  • CSI/CQI e.g., CSI/CQI
  • Some solutions seek to minimize the UE power consumption by setting the TAT to infinity, so that the TAT never expires. Such a solution may be feasible for small cells where the TA is not needed or for stationary UEs. Typically, however, this solution cannot be used since UEs are moving and the serving cell is not usually that small.
  • Another example of unnecessary starting of inactivity and short cycle timers is transmission of such a small amount of user data that a single scheduling of PUSCH or PDSCH resources is enough, or that remaining DRX active time based on currently running on-duration and inactivity timers is enough for transmitting the data.
  • the amount of data to be transmitted in DL is known for the eNB scheduler, and could be anticipated also for the UL based on, for example, the amount of data in the earlier transmissions and/or based on buffer status report (BSR) from the UE.
  • BSR buffer status report
  • the network e.g., eNB
  • the network indicates to the UE, in the PDCCH transmission, which may be scheduling a new UL/DL transmission, that the DRX inactivity timer is not started or restarted after successfully decoding the PDCCH transmission. Then, upon receiving the PDCCH, both the UE and network do not start or restart the inactivity timer.
  • the UE may be configured such that it does not start the inactivity timer unless it receives an indication that the DRX inactivity timer is to be started.
  • the network would explicitly indicate to the UE that the DRX inactivity timer is started. This indication may be included, for example, in the PDCCH transmission or in the PDSCH transmission, e.g., as a MAC CE specified for this purpose.
  • the PDCCH transmission may indicate that it is scheduling (in DL or UL) transmission of only control information (and/or transmission of a small amount of user data) and, as a result, the DRX inactivity timer should not be started. Additionally, the PDCCH transmission indicating that it is scheduling (in DL or UL) transmission of only control information (and/or transmission of small amount of user data) may also be used for purposes other than DRX inactivity timer handling.
  • the PDCCH transmission may indicate that it is scheduling transmission of a control message, such as the transmission of a TA command (or other specific control messages), and this does not start the DRX inactivity timer.
  • Fig. 2 illustrates an example operation of DRX when the PDCCH indicates that the DRX inactivity timer should not be started, according to one embodiment.
  • the example of Fig. 2 provides an advantage in that the UE power consumption is reduced, for example, because less PDCCH monitoring is done by the UE. This method could be applied, for instance, when there is only control information and/or a small amount of user data transmitted to the UE and, thus, the inactivity timer and short DRX would be unnecessary.
  • the PDCCH transmission may indicate that it is scheduling (in DL or UL) transmission of only control information and/or a small amount of user data and, therefore, the DRX inactivity timer should not be started.
  • a new bit is added to the existing downlink control information (DO) format to indicate that the transmission is only control information and/or a small amount of user data and should not start the DRX inactivity timer.
  • the PDCCH transmission may indicate to the UE to stop on-duration and inactivity timer and go directly to long DRX cycle.
  • new DCI format(s) may be specified for the purpose of scheduling transmission of control information and/or a small amount of user data.
  • the new format can be specified for reduced sets of transport block sizes, physical resource block (PRB) allocations, and multiple-input multiple-output (MIMO) modes, for example.
  • PRB physical resource block
  • MIMO multiple-input multiple-output
  • some specific information content in the DCI can be used to indicate that the UE should not start the inactivity timer.
  • This information content represents a bit combination that is not presently used for other purposes.
  • An example includes Modulation and Coding Set (MCS) index values 29-31 that are presently not used if a new transmission is scheduled for normal, i.e., not semi persistently scheduled, transmission (e.g., a new transmission is indicated by toggling of new transmission bit (NDI) and for normal transmission the CRC is scrambled with CRNTI while scrambling with SPS CRNTI is used for semi- persistent scheduling).
  • MCS Modulation and Coding Set
  • indication of a new normal transmission with bit combinations that map to MCS indexes 29-31 may be specified to mean that the UE should not start the inactivity timer.
  • the meaning of the rest of the bits can be freely specified, which would leave enough bits for sending the necessary information, such as resource allocation, transport block size, modulation order and hybrid automatic repeat request (HARQ) process number.
  • HARQ hybrid automatic repeat request
  • the minimal change may be such that the two bits that were used to indicate redundancy version would be utilized for transport block size indication, assuming that a small set of transport block sizes and a fixed redundancy version suffices for a new transmission (of control information and/or a small amount of user data).
  • TPC bits may be used for indicating the transport block size index. It is noted that, for retransmissions, the present DCI formats can be used without any new interpretations because retransmissions do not start or restart the DRX Inactivity Timer.
  • a new Cell Radio Network Temporary Identifier may be specified for scheduling resources for control information and/or small amount of user data (or in general scheduling resources without starting DRX inactivity timer).
  • a new Cell Radio Network Temporary Identifier may be specified for scheduling resources for control and/or a small amount of user data without starting the inactivity timer.
  • avoiding the extra power consumption due to inactivity timer and short DRX after a control message and/or a small data reception can be achieved by introducing a new MAC CE.
  • a new MAC CE can be specified that stops the inactivity timer, but does not stop on-duration, and does not start short DRX cycle. It is noted that the current DRX command MAC CE stops both of the inactivity timer and on-duration, and also starts the short DRX cycle.
  • a new MAC CE can be specified that indicates that the transmission should not start the inactivity timer.
  • a new MAC CE can be specified that indicates that the transmission starts the inactivity timer, but expiry of the started inactivity timer does not start the short cycle even if it is configured.
  • the inactivity timer may be initially started after successful decoding of PDCCH, but stopped later when the UE decodes the MAC CE.
  • a benefit of specifying a new MAC CE is that there is no need for modifications of DCI, and, thus, the specification impact is smaller.
  • Fig. 3a illustrates an example of an apparatus 10 according to an embodiment.
  • apparatus 10 may be a UE. It should be noted that one of ordinary skill in the art would understand that apparatus 10 may include components or features not shown in Fig. 3a. Only those components or feature necessary for illustration of the invention are depicted in Fig. 3a.
  • apparatus 10 includes a processor 22 for processing information and executing instructions or operations.
  • processor 22 may be any type of general or specific purpose processor. While a single processor 22 is shown in Fig. 3a, multiple processors may be utilized according to other embodiments. In fact, processor 22 may include one or more of general-purpose computers, special purpose computers, microprocessors, digital signal processors (DSPs), field-programmable gate arrays (FPGAs), application-specific integrated circuits (ASICs), and processors based on a multi-core processor architecture, as examples.
  • DSPs digital signal processors
  • FPGAs field-programmable gate arrays
  • ASICs application-specific integrated circuits
  • Apparatus 10 further includes a memory 14, which may be coupled to processor 22, for storing information and instructions that may be executed by processor 22.
  • Memory 14 may be one or more memories and of any type suitable to the local application environment, and may be implemented using any suitable volatile or nonvolatile data storage technology such as a semiconductor-based memory device, a magnetic memory device and system, an optical memory device and system, fixed memory, and removable memory.
  • memory 14 can be comprised of any combination of random access memory (RAM), read only memory (ROM), static storage such as a magnetic or optical disk, or any other type of non-transitory machine or computer readable media.
  • the instructions stored in memory 14 may include program instructions or computer program code that, when executed by processor 22, enable the apparatus 10 to perform tasks as described herein.
  • Apparatus 10 may also include one or more antennas 25 for transmitting and receiving signals and/or data to and from apparatus 10.
  • Apparatus 10 may further include a transceiver 28 configured to transmit and receive information.
  • transceiver 28 may be configured to modulate information on to a carrier waveform for transmission by the antenna(s) 25 and demodulates information received via the antenna(s) 25 for further processing by other elements of apparatus 10.
  • transceiver 28 may be capable of transmitting and receiving signals or data directly.
  • Processor 22 may perform functions associated with the operation of apparatus 10 including, without limitation, precoding of antenna gain/phase parameters, encoding and decoding of individual bits forming a communication message, formatting of information, and overall control of the apparatus 10, including processes related to management of communication resources.
  • memory 14 stores software modules that provide functionality when executed by processor 22.
  • the modules may include, for example, an operating system that provides operating system functionality for apparatus 10.
  • the memory may also store one or more functional modules, such as an application or program, to provide additional functionality for apparatus 10.
  • the components of apparatus 10 may be implemented in hardware, or as any suitable combination of hardware and software.
  • apparatus 10 may be a UE.
  • apparatus 10 may be controlled, by memory 14 and processor 22, to receive a PDCCH transmission for scheduling a new UL or DL transmission from the network (e.g., eNB).
  • the PDCCH transmission includes an indication that a DRX inactivity timer should not be started and/or should not be restarted.
  • apparatus 10 may be controlled, by memory 14 and processor 22, to decode the PDCCH transmission. After successfully decoding the PDCCH transmission, apparatus 10 may be controlled, by memory 14 and processor 22, to not start or not restart the DRX inactivity timer.
  • the indication received by apparatus 10 in the PDCCH transmission is an indication that the new uplink (UL) or downlink (DL) transmission being scheduled is of only control information and/or a small amount of user data that does not start the discontinuous reception (DRX) inactivity timer.
  • the indication may indicate that a TA command is being scheduled.
  • the indication may be included in a bit of the DCI.
  • a new DCI format is received for the purposes of scheduling resources for the control information and/or a small amount of user data.
  • the DCI may include a specific bit combination that indicates that apparatus 10 should not start or restart the DRX inactivity timer.
  • the specific bit combination may be the modulation and coding set (MCS) index values 29-31.
  • apparatus 10 may be controlled to receive a new CRNTI for scheduling of control information and/or a small amount of user data.
  • the new CRNTI can be set by radio resource control (RRC) signaling, or the new CRNTI may be freely selectable or in fixed relation to an original CRNTI.
  • RRC radio resource control
  • apparatus 10 may be controlled to receive a new MAC CE that stops the inactivity timer, does not stop on- duration, and does not start the short DRX cycle.
  • Fig. 3b illustrates an example of an apparatus 20 according to another embodiment.
  • apparatus 20 may be a network node, such as a base station or eNB. It should be noted that one of ordinary skill in the art would understand that apparatus 20 may include components or features not shown in Fig. 3b. Only those components or feature necessary for illustration of the invention are depicted in Fig. 3b.
  • apparatus 20 includes a processor 32 for processing information and executing instructions or operations.
  • processor 32 may be any type of general or specific purpose processor. While a single processor 32 is shown in Fig. 3b, multiple processors may be utilized according to other embodiments. In fact, processor 32 may include one or more of general-purpose computers, special purpose computers, microprocessors, digital signal processors (DSPs), field-programmable gate arrays (FPGAs), application-specific integrated circuits (ASICs), and processors based on a multi-core processor architecture, as examples.
  • DSPs digital signal processors
  • FPGAs field-programmable gate arrays
  • ASICs application-specific integrated circuits
  • Apparatus 20 further includes a memory 34, which may be coupled to processor 32, for storing information and instructions that may be executed by processor 32.
  • Memory 34 may be one or more memories and of any type suitable to the local application environment, and may be implemented using any suitable volatile or nonvolatile data storage technology such as a semiconductor-based memory device, a magnetic memory device and system, an optical memory device and system, fixed memory, and removable memory.
  • memory 34 can be comprised of any combination of random access memory (RAM), read only memory (ROM), static storage such as a magnetic or optical disk, or any other type of non-transitory machine or computer readable media.
  • the instructions stored in memory 34 may include program instructions or computer program code that, when executed by processor 32, enable the apparatus 20 to perform tasks as described herein.
  • Apparatus 20 may also include one or more antennas 35 for transmitting and receiving signals and/or data to and from apparatus 20.
  • Apparatus 20 may further include a transceiver 38 configured to transmit and receive information.
  • transceiver 38 may be configured to modulate information on to a carrier waveform for transmission by the antenna(s) 35 and demodulates information received via the antenna(s) 35 for further processing by other elements of apparatus 20.
  • transceiver 38 may be capable of transmitting and receiving signals or data directly.
  • Processor 32 may perform functions associated with the operation of apparatus 20 including, without limitation, precoding of antenna gain/phase parameters, encoding and decoding of individual bits forming a communication message, formatting of information, and overall control of the apparatus 20, including processes related to management of communication resources.
  • memory 34 stores software modules that provide functionality when executed by processor 32.
  • the modules may include, for example, an operating system that provides operating system functionality for apparatus 20.
  • the memory may also store one or more functional modules, such as an application or program, to provide additional functionality for apparatus 20.
  • the components of apparatus 20 may be implemented in hardware, or as any suitable combination of hardware and software.
  • apparatus 20 may be a base station, such as an eNB.
  • apparatus 20 may be controlled by memory 34 and processor 32 to transmit, to a UE, a PDCCH transmission for scheduling a new uplink (UL) or downlink (DL) transmission.
  • the PDCCH transmission may include an indication that the DRX inactivity timer should not be started or restarted by the UE.
  • both the network and UE know to omit the starting and/or restarting of the inactivity timer thereby reducing unnecessary power consumption.
  • the indication transmitted by apparatus 20 to the UE indicates that the new uplink (UL) or downlink (DL) transmission being scheduled is of only control information and/or a small amount of user data that does not start the discontinuous reception (DRX) inactivity timer.
  • the indication sent to the UE may indicate that the new uplink (UL) or downlink (DL) transmission being scheduled is a timing advance (TA) command.
  • TA timing advance
  • the indication transmitted by apparatus 20 to the UE may be included in a bit of the DCI.
  • apparatus 20 may be controlled to use a new DCI format for the purposes of scheduling new transmission without starting or restarting DRX inactivity timer.
  • apparatus 20 may be controlled to transmit the newly specified DCI format to the UE for the purposes of scheduling resources for the control information and/or a small amount of user data.
  • apparatus 20 may be controlled to include a specific bit combination in the DCI to indicate that the DRX inactivity timer should not be started.
  • apparatus 20 is controlled to transmit, to the UE, the DCI including the specific bit combination that indicates that the user equipment should not start or restart the DRX inactivity timer.
  • the specific bit combination may include, for example, MCS index values 29-31.
  • apparatus 20 may be controlled to specify a new CRNTI for scheduling of control information and/or a small amount of user data.
  • the new CRNTI is transmitted to the UE for the scheduling of the control information and/or a small amount of user data.
  • the new CRNTI may be set by RRC signaling. The new CRNTI can be freely selectable or in fixed relation to an original CRNTI.
  • apparatus 20 may be controlled to transmit a new MAC CE to the UE.
  • this new MAC CE stops the inactivity timer, does not stop on-duration, and does not start short DRX cycle.
  • Fig. 4 illustrates an example of a flow diagram of a method, according to one embodiment.
  • the method may include, at 400, receiving a PDCCH transmission including an indication that the DRX inactivity timer should not be started.
  • the method may further include, at 410, decoding the PDCCH transmission.
  • the method may include omitting any starting or restarting of the DRX inactivity timer.
  • the method illustrated in Fig. 4 may be performed by a UE.
  • Fig. 5 illustrates an example of a flow diagram of a method, according to another embodiment.
  • the method may include, at 500, including or adding an indication to a PDCCH transmission that the DRX inactivity timer should not be started.
  • the method may include transmitting the PDCCH transmission including the indication that the DRX inactivity timer should not be started to a UE.
  • the method illustrated in Fig. 5 may be performed by a network node, such as an eNB.
  • the functionality of any of the methods described herein, such as those illustrated in Figs. 4 and 5 discussed above, may be implemented by software and/or computer program code stored in memory or other computer readable or tangible media, and executed by a processor.
  • the functionality may be performed by hardware, for example through the use of an application specific integrated circuit (ASIC), a programmable gate array (PGA), a field programmable gate array (FPGA), or any other combination of hardware and software.
  • ASIC application specific integrated circuit
  • PGA programmable gate array
  • FPGA field programmable gate array
  • embodiments of the invention provide several advantages. For example, embodiments can support transmissions that do not start the DRX inactivity timer and, therefore, reduce power consumption that may be caused by the extra monitoring resulting from the starting of the inactivity timer. Some embodiments may be particularly useful for control and small data transmissions, for example. However, certain embodiments may also be equally applicable and advantageous in other situations.

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

Abstract

L'invention concerne la fourniture de systèmes, méthodes, appareils et produits de programme informatique pour une gestion améliorée de la signalisation de commande. Une méthode comprend la réception, par un équipement utilisateur, un canal de commande de liaison descendante physique (PDCCH) pour programmer la transmission d'une nouvelle liaison montante (UL) ou descendante (DL) de transmission. Le canal de commande de liaison descendante physique (PDCCH) de transmission comporte une indication selon laquelle une réception discontinue (DRX) de temporisateur d'inactivité ne doit pas être démarrée ou redémarrée.
PCT/US2013/021433 2013-01-14 2013-01-14 Gestion de signalisation de commande améliorée WO2014109769A1 (fr)

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Cited By (16)

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US9730208B2 (en) 2014-08-07 2017-08-08 Telefonaktiebolaget Lm Ericsson (Publ) Load power consumption management in discontinuous reception
US10028330B2 (en) 2014-08-07 2018-07-17 Telefonaktiebolaget Lm Ericsson (Publ) Load power consumption management in discontinuous reception
WO2016022059A1 (fr) * 2014-08-07 2016-02-11 Telefonaktiebolaget L M Ericsson (Publ) Gestion de consommation d'énergie de charge dans une réception discontinue
EP3414859A4 (fr) * 2016-02-12 2019-10-16 Nokia Technologies Oy Appareil et procédé pour mécanismes drx pour exploitation de processus harq seul dans l'ido-nb
US11497078B2 (en) 2016-02-12 2022-11-08 Nokia Technologies Oy Apparatus and method for DRX mechanisms for single HARQ process operation in NB-IoT
WO2018149280A1 (fr) * 2017-02-17 2018-08-23 中兴通讯股份有限公司 Procédé et dispositif de réception de données
CN111148193B (zh) * 2018-11-02 2021-09-07 华为技术有限公司 一种信息传输方法及通信装置
WO2020088680A1 (fr) * 2018-11-02 2020-05-07 华为技术有限公司 Procédé de transmission d'informations et appareil de communication
CN111148193A (zh) * 2018-11-02 2020-05-12 华为技术有限公司 一种信息传输方法及通信装置
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EP3869874A4 (fr) * 2018-11-02 2021-12-29 Huawei Technologies Co., Ltd. Procédé de transmission d'informations et appareil de communication
CN109906578A (zh) * 2019-01-31 2019-06-18 北京小米移动软件有限公司 目标下行信号的接收方法、装置、设备及系统
CN109906578B (zh) * 2019-01-31 2021-08-24 北京小米移动软件有限公司 目标下行信号的接收方法、装置、设备及系统
WO2021027963A1 (fr) * 2019-08-15 2021-02-18 华为技术有限公司 Procédé, appareil et système de commande de temporisateur
WO2021036649A1 (fr) * 2019-08-28 2021-03-04 维沃移动通信有限公司 Procédé de commutation de mode, terminal et dispositif de réseau
WO2022010700A1 (fr) * 2020-07-06 2022-01-13 Qualcomm Incorporated Mécanismes de temporisateur d'inactivité en réception discontinue

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