WO2019238241A1 - Dispositif client et nœud d'accès au réseau permettant une efficacité de puissance accrue - Google Patents

Dispositif client et nœud d'accès au réseau permettant une efficacité de puissance accrue Download PDF

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Publication number
WO2019238241A1
WO2019238241A1 PCT/EP2018/065959 EP2018065959W WO2019238241A1 WO 2019238241 A1 WO2019238241 A1 WO 2019238241A1 EP 2018065959 W EP2018065959 W EP 2018065959W WO 2019238241 A1 WO2019238241 A1 WO 2019238241A1
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WO
WIPO (PCT)
Prior art keywords
wake
scheme
client device
network access
access node
Prior art date
Application number
PCT/EP2018/065959
Other languages
English (en)
Inventor
Oleksandr PUCHKO
Kari Heiska
Johan Christer QVARFORDT
Petteri KELA
Original Assignee
Huawei Technologies Co., Ltd.
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 Huawei Technologies Co., Ltd. filed Critical Huawei Technologies Co., Ltd.
Priority to PCT/EP2018/065959 priority Critical patent/WO2019238241A1/fr
Priority to EP18732725.9A priority patent/EP3794877A1/fr
Publication of WO2019238241A1 publication Critical patent/WO2019238241A1/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
    • G—PHYSICS
    • G06—COMPUTING; CALCULATING OR COUNTING
    • G06F—ELECTRIC DIGITAL DATA PROCESSING
    • G06F1/00—Details not covered by groups G06F3/00 - G06F13/00 and G06F21/00
    • G06F1/26—Power supply means, e.g. regulation thereof
    • G06F1/32—Means for saving power
    • G06F1/3203—Power management, i.e. event-based initiation of a power-saving mode
    • G06F1/3206—Monitoring of events, devices or parameters that trigger a change in power modality
    • G06F1/3209—Monitoring remote activity, e.g. over telephone lines or network connections
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W76/00—Connection management
    • H04W76/20—Manipulation of established connections
    • H04W76/27—Transitions between radio resource control [RRC] states
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W76/00—Connection management
    • H04W76/20—Manipulation of established connections
    • H04W76/28—Discontinuous transmission [DTX]; Discontinuous reception [DRX]
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W52/00—Power management, e.g. TPC [Transmission Power Control], power saving or power classes
    • H04W52/02—Power saving arrangements
    • H04W52/0209—Power saving arrangements in terminal devices
    • H04W52/0225—Power saving arrangements in terminal devices using monitoring of external events, e.g. the presence of a signal
    • H04W52/0229—Power saving arrangements in terminal devices using monitoring of external events, e.g. the presence of a signal where the received signal is a wanted signal
    • 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 disclosure relates to a client device and a network access node for increased power efficiency in the client device. Furthermore, the disclosure also relates to corresponding methods and a computer program.
  • NR 5th generation of mobile networks also known as 5G new radio
  • NR 5G new radio
  • LTE long term evolution
  • PDCCH physical downlink control channel
  • the UE wakes up and an inactivity timer will be started or restarted.
  • the inactivity timer expires the UE will go to sleep until the next on-duration time.
  • This periodic sleep time decreases the power consumption of the UE.
  • a new power saving technique, called wake-up signalling has been proposed in 3 rd Generation Partnership Project (3GPP) as a valuable improvement for reducing the power consumption of the UE. It can decrease the latency compared to DRX and also decrease the power consumption by avoiding unnecessary PDCCH monitoring occasions during on- duration time.
  • An objective of embodiments is to provide a solution which mitigates or solves the drawbacks and problems of conventional solutions.
  • the above mentioned and other objectives are achieved with a client device for a wireless communication system, the client device being configured to
  • control message indicates a wake-up scheme among a plurality of wake-up schemes, wherein each wake-up scheme of the plurality of wake-up schemes is associated with at least one wake-up behaviour for reception of wake-up signals;
  • wake-up can in this disclosure be understood to mean a transition from a low power state, e.g. a sleep mode, to a high power state, e.g. an active mode.
  • a wake-up scheme can be understood to mean a scheme, e.g. a configuration, comprising at least one parameter defining at least one wake-up behaviour of a client device.
  • a wake-up behaviour can comprise monitoring for wake-up signals, i.e. when and how the client device monitors for wake-up signals, and/or when and how the client device performs wake-up upon reception of a wake-up signal.
  • the wake-up behaviour may further include periodical reception at the UE according to a DRX cycle and monitoring of the PDCCH during an on-duration time.
  • the wake-up behaviour for reception of wake-up signals includes refraining from receiving wake-up signals and only monitors the PDCCH during the on-duration time.
  • a wake-up scheme comprises one or more wake-up behaviour(s). Hence, one wake-up behaviour can relate to periodicity while another wake-up behaviour can relate to wake-up durations, etc.
  • An advantage of the client device according to the first aspect is that the client device can operate in a tailored wake-up configuration to meet both requirements on power savings and delay constraints.
  • the indicated wake- up scheme is a wake-up signal scheme.
  • the wake-up signal scheme can be understood such that the client device upon reception of a wake-up signal acts according to the wake-up behaviour.
  • the wake-up behaviour of the client device can be defined by the network access node through a power efficient signalling.
  • the wake-up signal scheme is associated with at least one wake-up behaviour in the group comprising:
  • An advantage with this implementation form is that the wake-up behaviour of the client device can be individually designed for each client device by the network access node. This will enable an optimized effect for all client devices. Wake-up upon reception of wake-up signals results in low latency. Time offset allows different type of modem implementations in the client device, such as separate wake-up receiver that can wake-up the main modem of the client device once wake-up signals has been received. Wake-up in a next on-duration enables using wake- up signals with discontinuous reception, i.e. wake-up signals indicate whether the client device needs to wake-up for on-duration or not.
  • control message indicates at least one parameter of the wake-up signal scheme in the group comprising: an identity of the wake-up signal scheme,
  • the network access node can determine the wake-up behaviour of the client device in such detail that an optimized effect can be enabled for all client devices. With these parameters the network access node can configure a desired trade-off between latency and energy consumption. For example, by increasing wake-up signal periodicity latency will increase but reduces energy consumption. The same principle applies for the other parameters of the implementation form.
  • the indicated wake- up scheme is a combined wake-up scheme comprising the wake-up signal scheme and a discontinuous reception scheme.
  • a wake-up periodicity of the wake-up signal scheme is less than an on-duration periodicity of the discontinuous reception scheme.
  • An advantage with this implementation form is that is that the client device can optimize the power saving at the same time as it would minimize the delay for data receptions. This is especially useful when the client device handles delay constraint data services.
  • the indicated wake- up scheme is associated with at least one of:
  • one or more transmit beams are one or more transmit beams.
  • the network access node can configure the client device with specific wake-up behaviour for a specific radio configuration. This will enable the network access node to optimize the power saving for the client device.
  • the client device may be configured with multiple bandwidth parts, carriers, beams, etc., and it might be beneficial to utilize different wake-up signalling scheme on different bandwidth parts, carriers, and beams. For example, another carrier can be taken into use with wake-up signals if additional bandwidth is needed or primary carrier is too crowded and low latency data needs to be sent.
  • control message is received in any of:
  • MAC medium access control
  • the network access node can have multiple means to control the wake-up behaviour of the client device. This will enable a more flexible handling of controlling the power saving for the client device.
  • radio resource control signalling and system information blocks can carry parameters that are not changed all the time.
  • the downlink control information and the MAC control element (CE) can be used for more dynamic and rapid parameterization.
  • the control message is received in radio resource control signalling requesting the client device to change radio resource control state, and wherein the indicated wake-up scheme is associated with a radio resource control state.
  • the network access node can associate a wake-up scheme with the radio resource control state, and thereby optimize the power saving efficiency for the client device.
  • the client device in idle or inactive state could need wake-up signals for indicating whether to wake-up for next idle/inactive on-duration i.e. paging occasion.
  • the client device in connected state could use a wake- up scheme which is linked to connected state discontinuous reception or wake-up scheme could indicate immediate wake-up.
  • a network access node for a wireless communication system the network access node being configured to
  • each wake-up scheme of the plurality of wake-up schemes is associated with at least one wake-up behaviour for the client device for reception of wake-up signals;
  • control message indicates the determined wake-up scheme.
  • An advantage of a network access node according to the second aspect is that by transmission of the control message indicating the determined wake-up scheme the client device can operate in a tailored wake-up configuration to meet both requirements on power savings and delay constraints.
  • the determined wake-up scheme is a wake-up signal scheme.
  • the wake-up behaviour of the client device can be configured by the network access node through a power efficient signalling.
  • the wake- up signal scheme is associated with at least one wake-up behaviour in the group comprising: wake-up upon reception of wake-up signals,
  • An advantage with this implementation form is that the wake-up behaviour of the client device can be individually designed for each client device by the network access node. This will enable an optimized effect for all client devices. Wake-up upon reception of wake-up signals results in low latency. Time offset allows different type of modem implementations in the client device, such as separate wake-up receiver that can wake-up the main modem of the client device once wake-up signals has been received. Wake-up in a next on-duration enables using wake- up signals with discontinuous reception, i.e. wake-up signals indicate whether the client device needs to wake-up for on-duration or not.
  • control message indicates at least one parameter of the determined wake-up signal scheme in the group comprising:
  • the network access node can determine the wake-up behaviour of the client device in such detail that an optimized effect can be enabled for all client devices. With these parameters the network access node can configure a desired trade-off between latency and energy consumption. For example, by increasing wake-up signal periodicity latency will increase but reduces energy consumption. The same principle applies for the other parameters of the implementation form.
  • the determined wake-up scheme is a combined wake-up scheme comprising the wake-up signal scheme and a discontinuous reception scheme.
  • An advantage with this implementation form is that the network access node can jointly configure the discontinuous reception scheme and the wake-up scheme for the client device such that they separately can meet different needs for the client device as well as save power in the client device.
  • a wake- up periodicity of the wake-up signal scheme is less than an on-duration periodicity of the discontinuous reception scheme.
  • An advantage with this implementation form is that is that the client device can optimize the power saving at the same time as it would minimize the delay for data receptions. This is especially useful when the client device handles delay constraint data services.
  • the determined wake-up scheme is associated with at least one of:
  • one or more transmit beams are one or more transmit beams.
  • the network access node can configure the client device with specific wake-up behaviour for a specific radio configuration. This will enable the network access node to optimize the power saving for the client device.
  • the client device may be configured with multiple bandwidth parts, carriers, beams, etc., and it might be beneficial to utilize different wake-up signalling scheme on different bandwidth parts, carriers, and beams. For example, another carrier can be taken into use with wake-up signals if additional bandwidth is needed or primary carrier is too crowded and low latency data needs to be sent.
  • control message is received in any of:
  • MAC medium access control
  • the network access node can have multiple means to control the wake-up behaviour of the client device. This will enable a more flexible handling of controlling the power saving for the client device.
  • radio resource control signalling and system information blocks can carry parameters that are not changed all the time.
  • the downlink control information and the MAC CE can be used for more dynamic and rapid parameterization.
  • the control message is transmitted in radio resource control signalling requesting the network access node to change radio resource control state, and wherein the determined wake-up scheme is associated with a radio resource control state.
  • the network access node can associate a wake-up scheme with the radio resource control state, and thereby optimize the power saving efficiency for the client device.
  • the client device in idle or inactive state could need wake-up signals for indicating whether to wake-up for next idle/inactive on-duration i.e. paging occasion.
  • the client device in connected state could use a wake- up scheme which is linked to connected state discontinuous reception or wake-up scheme could indicate immediate wake-up.
  • the above mentioned and other objectives are achieved with a method for a client device, the method comprises
  • control message indicates a wake-up scheme among a plurality of wake-up schemes, wherein each wake-up scheme of the plurality of wake-up schemes is associated with at least one wake-up behaviour for reception of wake-up signals;
  • an implementation form of the method comprises the feature(s) of the corresponding implementation form of the client device.
  • the above mentioned and other objectives are achieved with a method for a network access node, the method comprises determining a wake-up scheme among a plurality of wake-up schemes for a client device, wherein each wake-up scheme of the plurality of wake-up schemes is associated with at least one wake-up behaviour for the client device for reception of wake-up signals;
  • control message indicates the determined wake-up scheme.
  • an implementation form of the method comprises the feature(s) of the corresponding implementation form of the network access node.
  • the disclosure also relates to a computer program, characterized in program code, which when run by at least one processor causes said at least one processor to execute any method according to embodiments of the invention. Further, the disclosure also relates to a computer program product comprising a computer readable medium and said mentioned computer program, wherein said computer program is included in the computer readable medium, and comprises of one or more from the group: ROM (Read-Only Memory), PROM (Programmable ROM), EPROM (Erasable PROM), Flash memory, EEPROM (Electrically EPROM) and hard disk drive.
  • ROM Read-Only Memory
  • PROM Programmable ROM
  • EPROM Erasable PROM
  • Flash memory Flash memory
  • EEPROM Electrically EPROM
  • - Fig. 1 shows a client device according to an embodiment of the invention
  • FIG. 2 shows a method according to an embodiment of the invention
  • FIG. 3 shows a network access node according to an embodiment of the invention
  • FIG. 4 shows a method according to an embodiment of the invention
  • - Fig. 5 shows a wireless communication system according to an embodiment of the invention
  • - Fig. 6 shows a wake-up behaviour associated with a wake-up signal scheme according to an embodiment of the invention
  • - Fig. 7 shows a wake-up behaviour associated with a combined wake-up scheme according to an embodiment of the invention
  • Fig. 8 shows signalling of control messages according to an embodiment of the invention.
  • WUS wake-up signal
  • the main idea is that the network sends a wake-up signal (WUS) to a UE at a predefined time to indicate that the network has something to transmit to the UE.
  • the UE wakes up periodically and, if the UE receives the WUS transmitted by the network, the UE starts monitoring PDCCH after a predefined time.
  • WuRx separate low power wake-up receiver
  • the discontinuous reception (DRX) technique is widely used in LTE to reduce the power consumption of a UE during periods with low data transmission activity.
  • the UE When operating in DRX mode the UE is following a predefined algorithm that is controlled via DRX parameters such as: on-duration, DRX cycles, inactivity timer, etc.
  • these parameters do not give the radio network enough flexibility to adapt the wake-up behaviour of the UE.
  • the wake-up signalling technique can decrease the latency and the power consumption of the UE compared to DRX.
  • the inventors have identified the fact that the current wake-up signalling is not optimal for certain types of traffic, and further that existing parameters related to wake-up signalling do not give the network enough flexibility to adapt wake-up signalling to different traffic types.
  • Fig. 1 shows a client device 100 according to an embodiment of the invention.
  • the client device 100 comprises a processor 102, a transceiver 104 and a memory 106.
  • the processor 102 is coupled to the transceiver 104 and the memory 106 by communication means 108 known in the art.
  • the client device 100 further comprises an antenna or antenna array 1 10 coupled to the transceiver 104, which means that the client device 100 is configured for wireless communications in a wireless communication system.
  • client device 100 is configured to perform certain actions can in this disclosure be understood to mean that the client device 100 comprises suitable means, such as e.g. the processor 102 and the transceiver 104, configured to perform said actions.
  • suitable means such as e.g. the processor 102 and the transceiver 104, configured to perform said actions.
  • the client device 100 is configured to receive a control message 510 from a network access node 300 (see for instance Fig. 5).
  • the control message 510 indicates a wake-up scheme among a plurality of wake-up schemes, wherein each wake-up scheme of the plurality of wake-up schemes is associated with at least one wake-up behaviour for reception of wake-up signals.
  • the client device 100 is configured to operate in a wake-up signalling mode according to an associated wake-up behaviour of the indicated wake-up scheme.
  • Fig. 2 shows a flow chart of a corresponding method 200 which may be executed in a client device 100, such as the one shown in Fig. 1 .
  • the method 200 comprises receiving 202 a control message 510 from a network access node 300.
  • the control message 510 indicates a wake-up scheme among a plurality of wake-up schemes, wherein each wake-up scheme of the plurality of wake-up schemes is associated with at least one wake-up behaviour for reception of wake-up signals.
  • the method 200 further comprises operating 204 in a wake-up signalling mode according to an associated wake-up behaviour of the indicated wake-up scheme.
  • Fig. 3 shows a network access node 300 according to an embodiment of the invention.
  • the network access node 300 comprises a processor 302, a transceiver 304 and a memory 306.
  • the processor 302 is coupled to the transceiver 304 and the memory 306 by communication means 308 known in the art.
  • the network access node 300 may be configured for both wireless and wired communications in wireless and wired communication systems, respectively.
  • the wireless communication capability is provided with an antenna or antenna array 310 coupled to the transceiver 304, while the wired communication capability is provided with a wired communication interface 312 coupled to the transceiver 304. That the network access node 300 is configured to perform certain actions can in this disclosure be understood to mean that the network access node 300 comprises suitable means, such as e.g. the processor 302 and the transceiver 304, configured to perform said actions.
  • the network access node 300 is configured to determine a wake-up scheme among a plurality of wake-up schemes for a client device 100. Each wake-up scheme of the plurality of wake-up schemes is associated with at least one wake-up behaviour for the client device 100 for reception of wake-up signals. The network access node 300 is further configured to transmit a control message 510 to the client device 100 indicating the determined wake-up scheme.
  • Fig. 4 shows a flow chart of a corresponding method 400 which may be executed in a network access node 300, such as the one shown in Fig. 3.
  • the method 400 comprises determining 402 a wake-up scheme among a plurality of wake-up schemes for a client device 100. Each wake-up scheme of the plurality of wake-up schemes is associated with at least one wake-up behaviour for the client device 100 for reception of wake-up signals.
  • the method 400 further comprises transmitting 404 a control message 510 to the client device 100 indicating the determined wake-up scheme.
  • Fig. 5 shows a wireless communication system 500 according to an embodiment of the invention.
  • the wireless communication system 500 comprises a client device 100 and a network access node 300 configured to operate in the wireless communication system 500.
  • the wireless communication system 500 shown in Fig. 5 only comprises one client device 100 and one network access node 300.
  • the wireless communication system 500 may comprise any number of client devices 100 and network access nodes 300 without deviating from the scope of the invention.
  • the client device 100 is assumed to be in connected mode with the network access node 300. Therefore, data may be transmitted between the client device 100 and the network access node 300 more or less frequently, e.g. depending on the type of traffic between the client device 100 and the network access node 300.
  • the client device 100 can, according to embodiments, operate in a wake-up signalling mode determined by a wake-up scheme. When operating in a wake-up signalling mode, the client device 100 operates in a power saving mode, such as e.g. a sleep mode, and periodically monitors for wake-up signals from the network access node 300.
  • the client device 100 When the client device 100 detects a wake-up signal the client device 100 performs wake-up. That the client device 100 performs wake-up can herein be understood to mean that the client device 100 makes a transition from the power saving mode to an active mode. In the active mode the client device 100 may e.g. monitor the physical downlink control channel (PDCCH) and perform data reception and/or transmission. The monitoring of wake-up signals on the other hand may be performed by activating only the minimum functionality needed to detect wake- up signals or use a separate low power wake-up receiver in the client device 100. It is to be noted there may exists more modes in respect of power consumption than the power saving mode and the active mode, e.g. intermediate modes such as a semi-power saving mode and a semi-active mode.
  • PDCCH physical downlink control channel
  • the wake-up behaviour of the client device 100 is determined by the wake-up scheme.
  • the client device 100 receives the wake-up scheme from the network access node 300 in a control message 510, as shown in Fig. 5.
  • the network access node 300 hence determines a wake-up scheme for the client device 100 and transmits a control message 510 indicating the determined wake-up scheme to the client device 100.
  • the client device 100 receives the control message 510 indicating the wake-up scheme
  • the client device 100 operates in a wake-up signalling mode according to an associated wake-up behaviour of the indicated wake-up scheme. Therefore, it is provided a mechanism for the network access node 300 to configure the wake-up behaviour of the client device 100.
  • the network access node 300 may determine the wake-up scheme from among a plurality of wake-up schemes.
  • the network access node 300 may determine the wake-up scheme for the client device 100 based on e.g. the current traffic conditions, the type of traffic to/from the client device 100, etc.
  • the network access node 300 may configure the client device 100 with multiple wake-up schemes and indicate the determined wake-up scheme further based on the current situation for the client device 100.
  • the current situation can for example be defined by one or a combination of the services that the client device currently is running, the radio network deployment in the area that the client device is currently present, the capabilities of the client device, etc.
  • the network access node 300 can indicate an updated determined wake-up scheme from among the plurality of wake-up schemes. Therefore, it is provided a reduced signalling need to configure the wake-up behaviour of the client device 100.
  • the wake-up scheme is a wake-up signal scheme.
  • the wake-up signal scheme is associated with at least one wake-up behaviour indicating the behaviour of the client device 100 for reception of wake-up signals.
  • the wake- up signal scheme may be associated with at least one wake-up behaviour in the group comprising wake-up upon reception of wake-up signals, wake-up after an offset time period upon reception of wake-up signals, and wake-up in a next on-duration upon reception of wake- up signals.
  • the wake-up scheme is associated with at least one wake-up behaviour indicating when the client device 100 should wake-up after receiving a wake-up signal from the network access node 300, e.g.
  • the offset time period may e.g. correspond to the time between the transmission of the wake-up signal and the transmission of data in the downlink channel.
  • the next on-duration may e.g. be an on-duration of a DRX configuration.
  • the wake-up signal scheme may comprise parameters such as a wake-up periodicity, a wake- up reception time period, and a wake-up waiting time period until returning to sleep mode, as will be described below with reference to Fig. 6.
  • the control message 100 may indicate one or more of the parameters of the wake-up signal scheme directly. However, in embodiments the control message 100 may instead indicate an identity of the wake-up signal scheme. In this case, the client device 100 may use the identity of the wake-up signal scheme to derive the parameters of the wake-up signal scheme, e.g. from a pre-defined look-up table in the client device 100 or defined in a previously received control message 510. Hence, the control message 510 may indicate at least one parameter of the wake-up signal scheme in the group comprising an identity of the wake-up signal scheme, a wake-up periodicity, a wake-up reception time period, and a wake-up waiting time period until returning to sleep mode.
  • Fig. 6 shows the wake-up behaviour of a client device 100 associated with a wake-up signal scheme according to an embodiment of the invention.
  • the x-axis in Fig. 6 shows time and the y-axis power consumption in the client device 100, e.g. in watts.
  • the client device 100 periodically monitors for wake-up signals from a network access node 300. Each monitoring instance is in Fig. 6 shown as white columns.
  • the periodicity with which the client device 100 monitors for wake-up signals is determined by a wake-up periodicity WP of the wake-up signal scheme.
  • the wake-up periodicity WP determines the time period between two consecutive wake-up signal monitoring instances, as shown in Fig. 6.
  • the wake- up signal scheme may further comprise the wake-up reception time period WRT which corresponds to the duration of a wake-up signal monitoring instance, as shown in Fig. 6,
  • the wake-up reception time period WRT can e.g. be determined based on the time it takes for the client device 100 to receive a wake-up signal.
  • the wake-up reception time period WRT may vary based on the wake-up signal design, synchronization procedures, etc. used.
  • the network access node 300 obtains a data packet for the client device 100 at time instance t1 and transmits a wake-up signal at the next available wake- up signal monitoring instances at time instance t2.
  • the client device 100 detects the wake-up signal during the wake-up signal monitoring instances at time instance t2.
  • the wake-up signal scheme in the embodiment shown in Fig. 6 is associated with wake-up after an offset time period WO upon reception of wake-up signals.
  • the client device 100 wakes for data reception DR at offset time period WO after reception of wake-up signal at time instance t2, as shown in Fig. 6.
  • the wake-up signal scheme may further comprise a wake-up waiting time period WWT.
  • the wake-up waiting time period WWT specify a time period during which the client device 100 remains in active mode, i.e. the time period the client device 100 waits until returning to sleep mode after a data reception.
  • the wake-up scheme is a combined wake-up scheme comprising the wake-up signal scheme and a discontinuous reception scheme.
  • the client device 100 follows both the wake-up signal scheme and a discontinuous reception scheme at the same time.
  • the parameters of the wake-up signal scheme described above may be used, while the parameters of the discontinuous reception scheme may be known parameters used for discontinuous reception in conventional systems, such as LTE and NR.
  • the wake-up signal scheme may be configured according to the traffic type to provide a short latency, while the discontinuous reception scheme may be configured according to e.g. channel ageing caused by client device 100 mobility.
  • the wake-up periodicity of the wake-up signal scheme may be less than an on- duration periodicity of the discontinuous reception scheme.
  • Fig. 7 shows the wake-up behaviour of a client device 100 associated with a combined wake- up scheme according to an embodiment of the invention.
  • the x-axis in Fig. 7 shows time and the y-axis power consumption in the client device 100, e.g. in watts.
  • the client device 100 wakes-up with a wake-up periodicity WP during a wake-up reception time period WRT to monitor for wake-up signals from a network access node 300.
  • the client device 100 wakes-up for a discontinuous reception on- period DRX ON with an on-duration periodicity of the discontinuous reception scheme.
  • Fig. 7 shows the wake-up behaviour of a client device 100 associated with a combined wake- up scheme according to an embodiment of the invention.
  • the x-axis in Fig. 7 shows time and the y-axis power consumption in the client device 100, e.g. in watts.
  • the client device 100 wakes-up with a wake-up periodicity WP during
  • the on-duration periodicity of the discontinuous reception scheme is longer than the wake-up periodicity of the wake-up signal scheme.
  • the client device 100 detects a wake- up signal during a wake-up signal monitoring instance, the client device 100 wakes-up and performs data reception.
  • the client device 100 detects a wake-up signal during the wake-up signal monitoring instance at time instance t2 and hence wakes up an offset time period WO after reception of wake-up signal for data reception DR, as previously described with reference to Fig. 6.
  • the client device 100 returns to sleep mode directly after the data reception. Any tasks related to beam management, channel measurements/reporting, synchronization and radio resource management may be performed during the discontinuous reception on-period DRX ON -
  • the network access node 300 may transmit the control message 510 to the client device 100 in a number of different ways.
  • the control message 510 may be transmitted by the network access node 300 and received by the client device 100 in any of radio resource control (RRC) signalling, system information block (SIB), downlink control information (DCI), or medium access control (MAC) control element (CE).
  • RRC radio resource control
  • SIB system information block
  • DCI downlink control information
  • MAC medium access control
  • RRC signalling can be used.
  • a combination of DCI or MAC CE signalling and RRC signalling may be used to switch between wake-up schemes.
  • RRC signalling such as RRC configuration or re-configuration can give all or a subset of wake-up schemes related parameters, e.g. the parameters that are more static than the rest of the parameters.
  • DCI or MAC CE signalling can then be used for more agile (re)configuration of certain parameters that are more dynamic.
  • Fig. 8 shows the signalling of control messages 510 according to an embodiment where a combination of DCI signalling and RRC signalling is used.
  • the network access node 300 transmits a first control message 510 indicating a wake-up scheme to the client device 100 in a RRC configuration message.
  • the client device 100 configures a wake-up signalling mode according to the indicated wake-up scheme and starts to operate in the wake-up signalling mode in step II in Fig. 8.
  • the network access node 300 transmits a second control message 510’ in a DCI or a MAC CE.
  • the second control message 510’ may e.g. comprise one or more updated parameters of the wake-up scheme indicated in the first control message 510.
  • the network access node 300 may e.g. perform step III in case the traffic between the network access node 300 and the client device 100 change character and the wake-up scheme needs to be changed quickly. For example, if the client device 100 initiates more than one data flow the aggregated traffic resulting from the more than one data flow may be different compared to a single data flow.
  • the client device 100 Based on the information derived from the second control message 510’, the client device 100 re-configures the wake-up signalling mode and starts operating in the re configured wake-up signalling mode in step IV in Fig. 8.
  • the network access node 300 may further transmit a third control message 510” in a RRC re configuration message, as shown in step V in Fig. 8.
  • the third control message 510 may e.g. indicate a new wake-up scheme or indicate one or more updated parameters of the previously indicated wake-up scheme.
  • the client device 100 activates a new wake-up signalling mode or re-configures the current wake-up signalling mode and starts operating in the new or re-configured wake-up signalling mode in step VI in Fig. 8.
  • DCI or MAC CE may further be used for dynamic activation and/or deactivation of wake-up schemes.
  • This provides further flexibility to the wake-up behaviour of the client device 100 as wake-up schemes can be used dynamically according to present traffic and latency requirements.
  • the client device 100 may e.g. only configure a wake-up signalling mode based on the first control message 510 in step II in Fig. 8 but not start operating in the wake-up signalling mode until the second control message 510’ is received in a DCI or a MAC CE.
  • the second control message 510’ may in this case be used to activate the wake- up signalling mode.
  • different wake-up scheme configurations may be used for different e.g. bandwidth parts (BWPs), carriers, or cells.
  • BWPs bandwidth parts
  • the indicated wake-up scheme may hence be associated with at least one of one or more BWPs, one or more carriers, one or more RRC states, one or more receive beams, and one or more transmit beams.
  • the client device 100 may operate according to a wake- up scheme only for this or these BWPs.
  • a wake-up scheme can be configured to be related to all BWPs or the BWPs in which a wake-up signal was received.
  • the client device 100 can use a wake-up scheme only for certain BWPs or for all BWPs simultaneously. Furthermore, the client device 100 can monitor multiple wake-up scheme which are related to different BWPs simultaneously.
  • a wake-up scheme is associated with one or more radio resource control states
  • the client device 100 may e.g. operate according to different wake-up schemes in different RRC states.
  • the network access node 300 may transmit the second control message 510’ in RRC signalling requesting the client device 100 to change RRC state, where the wake-up scheme indicated in the first control message 510 is associated with a RRC state.
  • the client device 100 herein, may be denoted as a user device, a User Equipment (UE), a mobile station, an internet of things (loT) device, a sensor device, a wireless terminal and/or a mobile terminal, is enabled to communicate wirelessly in a wireless communication system, sometimes also referred to as a cellular radio system.
  • the UEs may further be referred to as mobile telephones, cellular telephones, computer tablets or laptops with wireless capability.
  • the UEs in this context may be, for example, portable, pocket-storable, hand-held, computer- comprised, or vehicle-mounted mobile devices, enabled to communicate voice and/or data, via the radio access network, with another entity, such as another receiver or a server.
  • the UE can be a Station (STA), which is any device that contains an IEEE 802.1 1 -conformant Media Access Control (MAC) and Physical Layer (PHY) interface to the Wireless Medium (WM).
  • STA Station
  • MAC Media Access Control
  • PHY Physical Layer
  • the UE may also be configured for communication in 3GPP related LTE and LTE-Advanced, in WiMAX and its evolution, and in fifth generation wireless technologies, such as New Radio.
  • the network access nodes 300 herein may also be denoted as a radio network access node, an access network access node, an access point, or a base station, e.g. a Radio Base Station (RBS), which in some networks may be referred to as transmitter,“gNB”,“gNodeB”,“eNB”, “eNodeB”,“NodeB” or“B node”, depending on the technology and terminology used.
  • RBS Radio Base Station
  • the radio network access nodes may be of different classes such as e.g. macro eNodeB, home eNodeB or pico base station, based on transmission power and thereby also cell size.
  • the radio network access node can be a Station (STA), which is any device that contains an IEEE 802.1 1 -conformant Media Access Control (MAC) and Physical Layer (PHY) interface to the Wireless Medium (WM).
  • STA Station
  • MAC Media Access Control
  • PHY Physical Layer
  • the radio client device may also be a base station corresponding to the fifth generation (5G) wireless systems.
  • any method according to embodiments may be implemented in a computer program, having code means, which when run by processing means causes the processing means to execute the steps of the method.
  • the computer program is included in a computer readable medium of a computer program product.
  • the computer readable medium may comprise essentially any memory, such as a ROM (Read-Only Memory), a PROM (Programmable Read-Only Memory), an EPROM (Erasable PROM), a Flash memory, an EEPROM (Electrically Erasable PROM), or a hard disk drive.
  • ROM Read-Only Memory
  • PROM PROM
  • EPROM Erasable PROM
  • Flash memory an EEPROM (Electrically Erasable PROM), or a hard disk drive.
  • embodiments of the client device 100 and the network access node 300 comprises the necessary communication capabilities in the form of e.g., functions, means, units, elements, etc., for performing the solution.
  • means, units, elements and functions are: processors, memory, buffers, control logic, encoders, decoders, rate matchers, de-rate matchers, mapping units, multipliers, decision units, selecting units, switches, interleavers, de-interleavers, modulators, demodulators, inputs, outputs, antennas, amplifiers, receiver units, transmitter units, DSPs, MSDs, TCM encoder, TCM decoder, power supply units, power feeders, communication interfaces, communication protocols, etc. which are suitably arranged together for performing the solution.
  • the processor(s) of the client device 100 and the network access node 300 may comprise, e.g., one or more instances of a Central Processing Unit (CPU), a processing unit, a processing circuit, a processor, an Application Specific Integrated Circuit (ASIC), a microprocessor, or other processing logic that may interpret and execute instructions.
  • the expression“processor” may thus represent a processing circuitry comprising a plurality of processing circuits, such as, e.g., any, some or all of the ones mentioned above.
  • the processing circuitry may further perform data processing functions for inputting, outputting, and processing of data comprising data buffering and device control functions, such as call processing control, user interface control, or the like.

Abstract

L'invention concerne une efficacité de puissance accrue dans un dispositif client à l'aide de schémas de réveil nouveaux et plus flexibles. Le dispositif client reçoit un schéma de réveil provenant d'un noeud d'accès au réseau. Le schéma de réveil est associé à un comportement de réveil indiquant une procédure de réveil du dispositif client pour la réception de signaux de réveil provenant du noeud d'accès au réseau, ainsi que le moment et la manière dont le dispositif client surveille les signaux de réveil. Sur la base du schéma de réveil reçu, le dispositif client fonctionne dans un mode de signalisation de réveil selon le comportement de réveil associé. Le noeud d'accès au réseau détermine des schémas de réveil pour le dispositif client et transmet les schémas de réveil déterminés au dispositif client de manière dynamique, par exemple sur la base d'un type ou de conditions de trafic courant.
PCT/EP2018/065959 2018-06-15 2018-06-15 Dispositif client et nœud d'accès au réseau permettant une efficacité de puissance accrue WO2019238241A1 (fr)

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PCT/EP2018/065959 WO2019238241A1 (fr) 2018-06-15 2018-06-15 Dispositif client et nœud d'accès au réseau permettant une efficacité de puissance accrue
EP18732725.9A EP3794877A1 (fr) 2018-06-15 2018-06-15 Dispositif client et noeud d'accès au réseau permettant une efficacité de puissance accrue

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CN112764520A (zh) * 2020-12-31 2021-05-07 广州技象科技有限公司 集中数据处理的中转设备数据处理方法及装置
CN112764520B (zh) * 2020-12-31 2024-03-29 广州技象科技有限公司 集中数据处理的中转设备数据处理方法及装置
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CN112764512B (zh) * 2021-01-26 2024-03-01 维沃移动通信有限公司 省电控制方法、装置、电子设备和可读存储介质
WO2023087189A1 (fr) * 2021-11-17 2023-05-25 Nec Corporation Procédé, dispositif et support de stockage informatique de communication
WO2023168596A1 (fr) * 2022-03-08 2023-09-14 北京小米移动软件有限公司 Procédé et appareil de détermination de cycle de signal de réveil, dispositif, et support de stockage

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