WO2021097665A1 - Signalisation à bande étroite pour économie d'énergie - Google Patents

Signalisation à bande étroite pour économie d'énergie Download PDF

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Publication number
WO2021097665A1
WO2021097665A1 PCT/CN2019/119432 CN2019119432W WO2021097665A1 WO 2021097665 A1 WO2021097665 A1 WO 2021097665A1 CN 2019119432 W CN2019119432 W CN 2019119432W WO 2021097665 A1 WO2021097665 A1 WO 2021097665A1
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WO
WIPO (PCT)
Prior art keywords
narrowband signal
configuration information
receiving
wideband
signal transmission
Prior art date
Application number
PCT/CN2019/119432
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English (en)
Inventor
Rapeepat Ratasuk
Mads LAURIDSEN
Jing He
Original Assignee
Nokia Shanghai Bell Co., Ltd.
Nokia Solutions And Networks Oy
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 Nokia Shanghai Bell Co., Ltd., Nokia Solutions And Networks Oy filed Critical Nokia Shanghai Bell Co., Ltd.
Priority to CN201980102383.4A priority Critical patent/CN114731574B/zh
Priority to PCT/CN2019/119432 priority patent/WO2021097665A1/fr
Publication of WO2021097665A1 publication Critical patent/WO2021097665A1/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
    • H04W52/0225—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
    • 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
    • H04W52/0261—Power saving arrangements in terminal devices managing power supply demand, e.g. depending on battery level
    • H04W52/0274—Power saving arrangements in terminal devices managing power supply demand, e.g. depending on battery level by switching on or off the equipment or parts thereof
    • H04W52/028—Power saving arrangements in terminal devices managing power supply demand, e.g. depending on battery level by switching on or off the equipment or parts thereof switching on or off only a part of the equipment circuit blocks
    • 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 present disclosure generally relate to the field of telecommunication and in particular, to devices, methods, devices and computer readable storage media of power saving by using a narrowband signal.
  • the grand objective of 5G wireless technology is to support three generic services with vastly heterogeneous requirements: enhanced mobile broadband (eMBB) , massive machine-type communications (mMTC) , and ultra-reliable low-latency communications (URLLC) .
  • eMBB enhanced mobile broadband
  • mMTC massive machine-type communications
  • URLLC ultra-reliable low-latency communications
  • the mMTC targets the cost-efficient and robust connection of billions of devices without overloading the network.
  • Critical success factors include cost efficiency, low power consumption and longtime availability, etc.
  • mMTC and New Radio will be deployed in the same band to support use cases such as industrial Internet of Things (IoT) , smart cities, wearables, etc.
  • IoT industrial Internet of Things
  • eMTC narrowband Enhanced Machine Type Communication
  • NB-IoT narrowband IoT
  • example embodiments of the present disclosure provide a solution of power saving by using a narrowband signal.
  • a first device comprising at least one processor; and at least one memory including computer program codes; the at least one memory and the computer program codes are configured to, with the at least one processor, cause the first device at least to receive, from a second device, first configuration information of a wideband signal transmission between the first device and the second device; receive, from the second device, second configuration information of a narrowband signal transmission from the second device to the first device based on the first configuration information; and transmit a response message for indicating that the first device is capable of receiving the narrowband signal
  • a second device comprising at least one processor; and at least one memory including computer program codes; the at least one memory and the computer program codes are configured to, with the at least one processor, cause the second device at least to transmit, to a first device, first configuration information of a wideband signal transmission between the first device and the second device; generate second configuration information of a narrowband signal transmission from the second device to the first device; transmit the second configuration information to the first device based on the first configuration information; and receive, from the first device, a response message for indicating that the first device is capable of receiving the narrowband signal.
  • a method comprises receiving, from a second device, first configuration information of a wideband signal transmission between the first device and the second device.
  • the method further comprises receiving, from the second device, second configuration information of a narrowband signal transmission from the second device to the first device based on the first configuration information; and transmitting a response message for indicating that the first device is capable of receiving the narrowband signal.
  • a method comprises transmitting, to a first device, first configuration information of a wideband signal transmission between the first device and the second device; generating second configuration information of a narrowband signal transmission from the second device to the first device; transmitting the second configuration information to the first device based on the first configuration information; and receiving, from the first device, a response message for indicating that the first device is capable of receiving the narrowband signal.
  • an apparatus comprises means for receiving, from a second device, first configuration information of a wideband signal transmission between the first device and the second device; means for receiving, from the second device, second configuration information of a narrowband signal transmission from the second device to the first device based on the first configuration information; and means for transmitting a response message for indicating that the first device is capable of receiving the narrowband signal.
  • an apparatus comprises means for transmitting, to a first device, first configuration information of a wideband signal transmission between the first device and the second device; means for generating second configuration information of a narrowband signal transmission from the second device to the first device; means for transmitting the second configuration information to the first device based on the first configuration information; and means for receiving, from the first device, a response message for indicating that the first device is capable of receiving the narrowband signal.
  • a computer readable medium having a computer program stored thereon which, when executed by at least one processor of a device, causes the device to carry out the method according to the third aspect.
  • a computer readable medium having a computer program stored thereon which, when executed by at least one processor of a device, causes the device to carry out the method according to the fourth aspect.
  • FIG. 1 shows an example communication network in which example embodiments of the present disclosure may be implemented
  • FIG. 2 shows a schematic diagram illustrating a process 200 of power saving by using a narrowband signal according to example embodiments of the present disclosure
  • FIG. 3 shows a flowchart of an example method 300 of power saving by using a narrowband signal according to some example embodiments of the present disclosure
  • FIG. 4 shows a flowchart of an example method 400 of power saving by using a narrowband signal according to some example embodiments of the present disclosure
  • FIG. 5 shows a simplified block diagram of a device that is suitable for implementing example embodiments of the present disclosure.
  • Fig. 6 shows a block diagram of an example computer readable medium in accordance with some embodiments of the present disclosure.
  • the term “communication network” refers to a network following any suitable communication standards, such as Long Term Evolution (LTE) , LTE-Advanced (LTE-A) , Wideband Code Division Multiple Access (WCDMA) , High-Speed Packet Access (HSPA) , and so on.
  • LTE Long Term Evolution
  • LTE-A LTE-Advanced
  • WCDMA Wideband Code Division Multiple Access
  • HSPA High-Speed Packet Access
  • the communications between a terminal device and a network device in the communication network may be performed according to any suitable generation communication protocols, including, but not limited to, the first generation (1G) , the second generation (2G) , 2.5G, 2.75G, the third generation (3G) , the fourth generation (4G) , 4.5G, the future fifth generation (5G) communication protocols, and/or any other protocols either currently known or to be developed in the future.
  • Embodiments of the present disclosure may be applied in various communication systems. Given the rapid development in communications, there will of course also be future type communication technologies and systems with which the present disclosure may be embodied. It should not be seen as limiting the scope of the present disclosure to only the aforementioned system. For the purpose of illustrations, embodiments of the present disclosure will be described with reference to 5G communication system.
  • the term “network device” used herein includes, but not limited to, a base station (BS) , a gateway, a registration management entity, and other suitable device in a communication system.
  • base station or “BS” represents a node B (NodeB or NB) , an evolved NodeB (eNodeB or eNB) , a NR NB (also referred to as a gNB) , a Remote Radio Unit (RRU) , a radio header (RH) , a remote radio head (RRH) , a relay, a low power node such as a femto, a pico, and so forth.
  • NodeB or NB node B
  • eNodeB or eNB evolved NodeB
  • NR NB also referred to as a gNB
  • RRU Remote Radio Unit
  • RH radio header
  • RRH remote radio head
  • relay a low power node such as a femto, a pico
  • terminal device includes, but not limited to, “user equipment (UE) ” and other suitable end device capable of communicating with the network device.
  • the “terminal device” may refer to a terminal, a Mobile Terminal (MT) , a Subscriber Station (SS) , a Portable Subscriber Station, a Mobile Station (MS) , or an Access Terminal (AT) .
  • MT Mobile Terminal
  • SS Subscriber Station
  • MS Mobile Station
  • AT Access Terminal
  • circuitry used herein may refer to one or more or all of the following:
  • circuitry also covers an implementation of merely a hardware circuit or processor (or multiple processors) or portion of a hardware circuit or processor and its (or their) accompanying software and/or firmware.
  • circuitry also covers, for example and if applicable to the particular claim element, a baseband integrated circuit or processor integrated circuit for a mobile device or a similar integrated circuit in server, a cellular network device, or other computing or network device.
  • FIG. 1 shows an example communication network 100 in which embodiments of the present disclosure can be implemented.
  • the network 100 includes a second device 120 (hereinafter may be referred as to a network device 120) and first devices 110-1 and 110-2 (hereinafter collectively referred to as first devices 110 or individually referred to as a terminal device 110) served by the network device 120.
  • the serving area of the network device 120 is called as a cell 102.
  • the network 100 may include any suitable number of network devices and terminal devices adapted for implementing embodiments of the present disclosure. Although not shown, it would be appreciated that one or more terminal devices may be in the cell 102 and served by the network device 120.
  • the network 100 may be a Code Division Multiple Access (CDMA) network, a Time Division Multiple Address (TDMA) network, a Frequency Division Multiple Access (FDMA) network, an Orthogonal Frequency-Division Multiple Access (OFDMA) network, a Single Carrier-Frequency Division Multiple Access (SC-FDMA) network or any others.
  • CDMA Code Division Multiple Access
  • TDMA Time Division Multiple Address
  • FDMA Frequency Division Multiple Access
  • OFDMA Orthogonal Frequency-Division Multiple Access
  • SC-FDMA Single Carrier-Frequency Division Multiple Access
  • Communications discussed in the network 100 may use conform to any suitable standards including, but not limited to, New Radio Access (NR) , Long Term Evolution (LTE) , LTE-Evolution, LTE-Advanced (LTE-A) , Wideband Code Division Multiple Access (WCDMA) , Code Division Multiple Access (CDMA) , cdma2000, and Global System for Mobile Communications (GSM) and the like.
  • NR New Radio Access
  • LTE Long Term Evolution
  • LTE-A LTE-Evolution
  • WCDMA Wideband Code Division Multiple Access
  • CDMA Code Division Multiple Access
  • GSM Global System for Mobile Communications
  • the communications may be performed according to any generation communication protocols either currently known or to be developed in the future. Examples of the communication protocols include, but not limited to, the first generation (1G) , the second generation (2G) , 2.5G, 2.75G, the third generation (3G) , the fourth generation (4G) , 4.5G, the fifth generation (5G) communication protocols.
  • the techniques described herein may be used
  • the power consumption of the terminal device is proportional to radio frequency bandwidth (BW) .
  • BW radio frequency bandwidth
  • the NR power model available in TR 38.840 designates 100 MHz bandwidth with 100%power consumption, while 20 MHz BW uses 40%power consumption.
  • the minimum BW is 5MHz, although typical deployment in frequency range FR1 will use 10 or 20 MHz bandwidth.
  • NR Physical Downlink Control Channel (PDCCH) can span a wide BW while e.g. Synchronization Signal Block (SSB) is already confined to 3.6-7.2 MHz for 15/30 kHz Subcarrier Spacing (SCS) .
  • SCS Subcarrier Spacing
  • monitoring the SSB for synchronization and time-frequency tracking is power consuming even when PDCCH is only infrequently monitored.
  • mMTC targets low power consumption
  • NR New Radio
  • narrowband Enhanced Machine Type Communication (eMTC) /Narrowband IoT (NB-IoT) carriers would be deployed in-band to NR carrier or within NR carrier guard band.
  • the minimum bandwidth of eMTC is 1.4 MHz while NB-IoT bandwidth is 180 kHz.
  • Narrowband eMTC will have Primary Synchronization Signal (PSS) /Secondary Synchronization Signal (SSS) /Cell Specific Reference Signal (CRS) that must be transmitted for the eMTC terminal devices.
  • PSS Primary Synchronization Signal
  • SSS Secondary Synchronization Signal
  • CRS Cell Specific Reference Signal
  • NB-IoT will have Narrowband Primary Synchronization Signal (NPSS) /Narrowband Secondary Synchronization Signal (NSSS) /Narrowband Reference Signal (NRS) that must be transmitted for the NB-IoT terminal devices.
  • NPSS Primary Synchronization Signal
  • NSSS Narrowband Secondary Synchronization Signal
  • NRS Narrowband Reference Signal
  • the present invention proposes a solution to indicate the narrowband signals to the NR terminal devices, such that the NR terminal devices may use the narrowband signals according to the capability and desire of the terminal devices. Meanwhile the power saving could be achieved by using the narrowband signal.
  • FIG. 2 shows a schematic diagram of power saving by using a narrowband signal.
  • the process 200 will be described with reference to FIG. 1.
  • the process 200 may involve the network device 120 and the terminal device 110 as illustrated in FIG. 1.
  • the network device 120 may configure necessary parameters for characterizing the narrowband signals, such as the type of the narrowband signal.
  • the narrowband signal may be any of PSS/SSS/CRS or NPSS/NSSS/NRS.
  • the network device 120 may determine necessary parameters for indicating resources for the transmission and detection or demodulation of the narrowband signal. Such the physical resource blocks (PRBs) allocated for the transmission. Furthermore, some parameters associated with the transmission may also be determined by the network device 120 such as an identifier of a cell for carrying the transmission, i.e. Physical Cell ID (PCID) of eMTC/NB-IoT, which may indicate the cell supporting the transmission of the narrowband signal. Some offset associated with the transmission may also be included in the parameters, such as carrier offset, SCS offset and PRBs offset, etc.
  • PCID Physical Cell ID
  • the network device 120 generates 205 configuration information of the narrowband signal transmission based on at least one above-mentioned parameter related the transmission of the narrowband signal and transmit 210 the configuration information of the narrowband signal transmission to the terminal device 110 to indicate the presence of the narrowband.
  • the transmission of the narrowband signal from the network device 120 to the terminal device 110 may be performed based on the configuration information of a wideband signal transmission, which may has been provided to the terminal device 120 from the network device 120. That is, the network device 120 may use a wideband signal to transmit the information associated with the narrowband signal to the terminal device 110.
  • the configuration information associated with the narrowband signal may be transmitted via a higher layer signalling.
  • the configuration information may be transmitted in system information broadcasted by the network device 120, for example, a System Information Block type1 (SIB1) as a new information element.
  • SIB1 System Information Block type1
  • the configured parameters can be included in the specific field in this new information element.
  • the configuration information may also be transmitted via signaling specified for the terminal device 110, for example using device specific Radio Resource Control message or signalling.
  • the terminal device 110 may transmit 220 a response message to the network device 120.
  • the response message may indicate that the terminal device 110 is capable of receiving the narrowband signal.
  • This response message may also allow the network device 120 to turn on narrowband signal e.g. NB-IoT Narrowband Reference Signal (NRS) even when there is no NB-IoT terminal device in the cell.
  • narrowband signal e.g. NB-IoT Narrowband Reference Signal (NRS)
  • NRS Narrowband Reference Signal
  • the network device 12 may also generate 225 a configuration message, which may indicate an operation to be performed by the terminal device 110 by using the narrowband signal and transmit 230 the configuration message to the terminal device 110.
  • the configuration message may also be transmitted from the network device 120 to the terminal device 110 at action 210, i.e. along with the configuration information of the narrowband signal transmission.
  • the terminal device 110 may switch 235 to a narrowband mode to maintain low power consumption when the terminal device 110 receives the configuration message indicate an operation to be performed by the terminal device 110 by using the narrowband signal.
  • a timer for the switching of a band mode may be preconfigured. For example, if a downlink transmission has not been monitored by the terminal device 110 for a predetermined time interval, the terminal device 110 may switch 235 to a narrowband mode.
  • the network device 120 may configure a specific operation for the terminal device 110 to use the narrowband signal.
  • the narrowband signal can be used for synchronization, time-frequency tracking, phase tracking, and measurements such as mobility measurements and cell selection or reselection measurements.
  • the network device 120 may configure the narrowband Control Resource Set (CORESET) associated with narrowband signal (for example, the CORESET may be configured in the same Bandwidth Part (BWP) as the narrowband signal) , which may be considered as a resource configuration of control information for a further transmission of data from the network device 120 to the terminal device 110, and may transmit the configured narrowband CORESET to the terminal device 110 via the configuration message.
  • CORESET Control Resource Set
  • BWP Bandwidth Part
  • the terminal device 110 may determine that the narrowband signal is to be used for monitoring the control information on the PDCCH between the network device 120 and the terminal device 110 and enter to the narrowband mode to maintain low power consumption.
  • the terminal device 110 can be in a state of RRC connected, a state of idle, or a state of inactive mode.
  • the terminal device 110 may monitor the PDCCH by detecting the narrowband signal.
  • the network device 120 may transmit 240 a narrowband signal to the terminal device 110.
  • control information may be transmitted to the terminal device 110 by means of the narrowband signal, since the narrowband CORESET has smaller bandwidth, the network device 120 may have to transmit for longer in time to maintain the same performance.
  • the terminal device 110 can determine whether control information is included in the narrowband signal based on the received resource configuration, i.e. the configuration of the narrowband CORESET of the control information. If the terminal device 110 can obtain the control information from the narrowband signal, the terminal device 110 may be aware of a subsequent data transmission in the wideband. Thus, the terminal device 110 may switch 245 from the narrowband mode to a wideband mode.
  • the terminal device 110 may determine a Bandwidth Part (BWP) of the wideband signal for the further transmission of the data based on the control information.
  • BWP Bandwidth Part
  • the terminal device 110 may switch to the wideband mode for receiving 250 the data on the determined BWP.
  • an additional delay may be introduced to allow terminal device 110 have enough time to switch to the wideband BWP.
  • the additional delay may be fixed (e.g. specified in either RAN1 or RAN4 specification) or given via the control information. In additional, the additional delay may depend on re-tuning time of the terminal device.
  • the terminal device 110 may also perform the time-frequency tracking based on the control information obtained from the narrowband signal.
  • the network device 120 may determine configuration for a radio resources measurement (RRM) , which may including possibly new thresholds to detect the condition of the radio resources.
  • RRM radio resources measurement
  • the measurement event triggers used by NR terminal devices on the NB-IoT may be lower than the thresholds configured for ordinary NB-IoT terminal devices. Otherwise a risk may be raised that the NR terminal device is unable to connect with the full bandwidth NR carrier when needed.
  • the terminal device 110 may perform relaxed RRM measurements on the narrow bandwidth carrier. If the value drops below a certain level, the terminal device must switch to the ordinary NR carrier and initiate normal RRM measurements.
  • the network device 120 may also provide a rough guide on whether to e.g. switch cells, with further wideband measurements for more accurate results in the configuration of RRM measurement.
  • the configuration of RRM measurement may indicate if the measured narrowband RSRP is below a threshold, then the terminal device may switch to wideband RSRP measurement.
  • the network device 120 may transmit the configuration for the RRM to the terminal device 110 via the configuration message.
  • the message may be transmitted in a higher layer signalling.
  • the terminal device 110 may determine that the narrowband signal is to be used for performing a RRM measurement and enter to the narrowband mode to maintain low power consumption.
  • the network device 120 then may transmit 240 a narrowband signal to the terminal device 110.
  • the terminal device 110 may measure power level of the narrowband signal in the RRM measurement and compare the measured power level with a threshold power level, which may obtain from the configuration message or preconfigured configuration information for the RRM measurement.
  • the terminal device 110 may generate 255 a measurement report based on a comparison result and transmit 260 the measurement report to the network device 120.
  • the network device 120 may arrange another wideband RRM measurement.
  • the terminal device 110 may switch 265 to a wideband mode for performing a further measurement of the radio resources in the wideband mode.
  • the terminal device 110 may also receive a further narrowband signal from a further network device different from the network device 120 and perform the RRM measurement for the further narrowband signal based on the configuration of the RRM measurements. For example, the terminal device 110 determines that the measured received power level of radio resources in the further narrowband signal is higher than the predetermined threshold power level, the terminal device 110 may transmit a measurement report of this comparison to the network device 120 and switch to a wideband mode for performing a measurement of the radio resources for the third device in the wideband mode.
  • the NB-IoT/eMTC signals may also be used for mobility measurements.
  • the serving cell configuration is configured which indicate that neighbour cell x is using a narrowband carrier with PCID, offset, etc. If the terminal device 110 then measures cell x is better, it can move to the wideband.
  • the network device 120 may determine configuration for a phase tracking and transmit the configuration for the phase tracking to the terminal device 110 via the configuration message.
  • the terminal device 110 may determine that the narrowband signal is to be used for performing the phase tracking and enter to the narrowband mode to maintain low power consumption.
  • the network device 120 may transmit 240 a narrowband signal to the terminal device 110, and the terminal device 110 may determine a phase noise associated with the narrowband signal based on a phase tracking configuration and perform 270 the phase tracking based on the phase noise.
  • the narrowband signal is introduced for power saving.
  • the network device 120 may inform the narrowband signal to the terminal device and the terminal device may enter the low power narrowband mode for receiving the narrowband signal and return to the wideband mode only in certain condition. In this way, the power consumption may be reduced and the system becomes more cost-effective.
  • FIG. 3 shows a flowchart of an example method 300 of power saving by using a narrowband signal. According to some example embodiments of the present disclosure.
  • the method 300 can be implemented at the first device 110 as shown in FIG. 1. For the purpose of discussion, the method 300 will be described with reference to FIG. 1.
  • the first device 110 receives, from a second device 120, first configuration information of a wideband signal transmission between the first device and the second device.
  • the first device 110 receives, from a second device 120, second configuration information of a narrowband signal transmission from the second device to the first device based on the first configuration information.
  • the second configuration information comprises at least one of the following: an identifier of a cell for carrying the narrowband signal transmission, an offset of a carrier associated with the narrowband signal transmission, a type of the narrowband signal, resource blocks allocated for the narrowband signal transmission, an offset of the resource blocks, an subcarrier spacing of the narrowband signal transmission, and an offset of power associated with the narrowband signal transmission.
  • the second configuration information is received via system information broadcasted by the second device or signaling specified for the first device.
  • the first device 110 transmits a response message for indicating that the first device is capable of receiving the narrowband signal.
  • the first device 110 may receive a configuration message indicating an operation to be performed by the first device by using the narrowband signal.
  • the first device 110 if the first device 110 receives the configuration message or determines that a preconfigured timer for a switching of a band mode is expired, switch to a narrowband mode for receiving the narrowband signal based on the second configuration information.
  • the first device 110 may receive the narrowband signal from the second device and determine control information for a further transmission of data from the second device to the first device based on the configuration message.
  • the first device 110 may further determine a BWP for the further transmission based on the control information and switch to a wideband mode for receiving the data on the BWP in the further transmission.
  • the first device 110 may receive the narrowband signal from the second device.
  • the first device 110 may further determine a measured received power level of radio resources in the narrowband signal by performing a measurement of the radio resources for the narrowband signal based on the configuration message and compare the measured power level with a predetermined threshold power level. If the first device 110 determines that the measured power level is lower than the predetermined threshold power level, the first device 110 may further transmit a measurement report associated with the comparison to the second device and switch to a wideband mode for performing a further measurement of the radio resources in the wideband mode.
  • the first device 110 may receive the narrowband signal from the second device.
  • the first device 110 may determine a phase noise associated with the narrowband signal based on configuration message and perform the phase tracking based on the phase noise.
  • the first device is a terminal device and the second device is a network device.
  • FIG. 4 shows a flowchart of an example method 400 of power saving by using a narrowband signal according to some example embodiments of the present disclosure.
  • the method 400 can be implemented at the second device 120 as shown in FIG. 1. For the purpose of discussion, the method 400 will be described with reference to FIG. 1.
  • the second device 120 transmits, to a first device 110, first configuration information of a wideband signal transmission between the first device 110 and the second device 120.
  • the second device 120 generates second configuration information of a narrowband signal transmission from the second device 120 to the first device 110.
  • the second configuration information comprises at least one of the following: an identifier of a cell for carrying the narrowband signal transmission, an offset of a carrier associated with the narrowband signal transmission, a type of the narrowband signal, resource blocks allocated for the narrowband signal transmission, an offset of the resource blocks, an subcarrier spacing of the narrowband signal transmission, and an offset of power associated with the narrowband signal transmission.
  • the second device 120 transmits the second configuration information to the first device 110 based on the first configuration information.
  • the second configuration information is transmitted via system information broadcasted by the second device 120 or signaling specified for the first device 110.
  • the second device 120 may generate a configuration message indicating an operation to be performed by the first device by using the narrowband signal. The second device 120 may further transmit the configuration message to the first device 110.
  • the second device 120 receives, from the first device 110, a response message for indicating that the first device 110 is capable of receiving the narrowband signal.
  • the second device 120 may further generate control information for a further wideband transmission of data from the second device to the first device and transmit the control information to the first device via the narrowband signal, to cause the first device to switch to a wideband mode for receiving data of the a Bandwidth Part, BWP in the further wideband transmission based on the control information.
  • the second device 120 may further transmit the narrowband signal to the first device based on the second configuration information; and transmit a wideband signal to the first device, to cause the first device to perform a further measurement of the radio resources in a wideband mode if the second device 120 receives, from the first device 110, a measurement report associated with a comparison that a measured received power level of radio resources in the narrowband signal is lower than a predetermined threshold power level.
  • the second device 120 may further transmit the narrowband signal to the first device based on the second configuration information, to cause the first device to determine a phase noise associated with the narrowband signal for performing the phase tracking.
  • the first device is a terminal device and the second device is a network device.
  • an apparatus capable of performing the method 300 may comprise means for performing the respective steps of the method 300.
  • the means may be implemented in any suitable form.
  • the means may be implemented in a circuitry or software module.
  • the apparatus comprises means for receiving, from a second device, first configuration information of a wideband signal transmission between the first device and the second device; means for receiving, from the second device, second configuration information of a narrowband signal transmission from the second device to the first device based on the first configuration information; and means for transmitting a response message for indicating that the first device is capable of receiving the narrowband signal.
  • an apparatus capable of performing the method 400 may comprise means for performing the respective steps of the method 400.
  • the means may be implemented in any suitable form.
  • the means may be implemented in a circuitry or software module.
  • the apparatus comprises means for transmitting, to a first device, first configuration information of a wideband signal transmission between the first device and the second device; means for generating second configuration information of a narrowband signal transmission from the second device to the first device; means for transmitting the second configuration information to the first device based on the first configuration information; and means for receiving, from the first device, a response message for indicating that the first device is capable of receiving the narrowband signal.
  • FIG. 5 is a simplified block diagram of a device 500 that is suitable for implementing embodiments of the present disclosure.
  • the device 500 may be provided to implement the communication device, for example the terminal device 110 and the network device 120 as shown in FIG. 1.
  • the device 500 includes one or more processors 510, one or more memories 540 coupled to the processor 510, and one or more transmitters and/or receivers (TX/RX) 540 coupled to the processor 510.
  • TX/RX transmitters and/or receivers
  • the TX/RX 540 is for bidirectional communications.
  • the TX/RX 540 has at least one antenna to facilitate communication.
  • the communication interface may represent any interface that is necessary for communication with other network elements.
  • the processor 510 may be of any type suitable to the local technical network and may include one or more of the following: general purpose computers, special purpose computers, microprocessors, digital signal processors (DSPs) and processors based on multicore processor architecture, as non-limiting examples.
  • the device 500 may have multiple processors, such as an application specific integrated circuit chip that is slaved in time to a clock which synchronizes the main processor.
  • the memory 520 may include one or more non-volatile memories and one or more volatile memories.
  • the non-volatile memories include, but are not limited to, a Read Only Memory (ROM) 524, an electrically programmable read only memory (EPROM) , a flash memory, a hard disk, a compact disc (CD) , a digital video disk (DVD) , and other magnetic storage and/or optical storage.
  • the volatile memories include, but are not limited to, a random access memory (RAM) 522 and other volatile memories that will not last in the power-down duration.
  • a computer program 530 includes computer executable instructions that are executed by the associated processor 510.
  • the program 530 may be stored in the ROM 520.
  • the processor 510 may perform any suitable actions and processing by loading the program 530 into the RAM 520.
  • the embodiments of the present disclosure may be implemented by means of the program 530 so that the device 500 may perform any process of the disclosure as discussed with reference to FIGs. 2 to 4.
  • the embodiments of the present disclosure may also be implemented by hardware or by a combination of software and hardware.
  • the program 530 may be tangibly contained in a computer readable medium which may be included in the device 500 (such as in the memory 520) or other storage devices that are accessible by the device 500.
  • the device 500 may load the program 530 from the computer readable medium to the RAM 522 for execution.
  • the computer readable medium may include any types of tangible non-volatile storage, such as ROM, EPROM, a flash memory, a hard disk, CD, DVD, and the like.
  • Fig. 6 shows an example of the computer readable medium 600 in form of CD or DVD.
  • the computer readable medium has the program 530 stored thereon.
  • various embodiments of the present disclosure may be implemented in hardware or special purpose circuits, software, logic or any combination thereof. Some aspects may be implemented in hardware, while other aspects may be implemented in firmware or software which may be executed by a controller, microprocessor or other computing device. While various aspects of embodiments of the present disclosure are illustrated and described as block diagrams, flowcharts, or using some other pictorial representations, it is to be understood that the block, device, system, technique or method described herein may be implemented in, as non-limiting examples, hardware, software, firmware, special purpose circuits or logic, general purpose hardware or controller or other computing devices, or some combination thereof.
  • the present disclosure also provides at least one computer program product tangibly stored on a non-transitory computer readable storage medium.
  • the computer program product includes computer-executable instructions, such as those included in program modules, being executed in a device on a target real or virtual processor, to carry out the methods 300 and 400 as described above with reference to FIGs. 3-4.
  • program modules include routines, programs, libraries, objects, classes, components, data structures, or the like that perform particular tasks or implement particular abstract data types.
  • the functionality of the program modules may be combined or split between program modules as desired in various embodiments.
  • Machine-executable instructions for program modules may be executed within a local or distributed device. In a distributed device, program modules may be located in both local and remote storage media.
  • Program code for carrying out methods of the present disclosure may be written in any combination of one or more programming languages. These program codes may be provided to a processor or controller of a general purpose computer, special purpose computer, or other programmable data processing device, such that the program codes, when executed by the processor or controller, cause the functions/operations specified in the flowcharts and/or block diagrams to be implemented.
  • the program code may execute entirely on a machine, partly on the machine, as a stand-alone software package, partly on the machine and partly on a remote machine or entirely on the remote machine or server.
  • the computer program codes or related data may be carried by any suitable carrier to enable the device, device or processor to perform various processes and operations as described above.
  • Examples of the carrier include a signal, computer readable medium, and the like.
  • the computer readable medium may be a computer readable signal medium or a computer readable storage medium.
  • a computer readable medium may include but not limited to an electronic, magnetic, optical, electromagnetic, infrared, or semiconductor system, device, or device, or any suitable combination of the foregoing. More specific examples of the computer readable storage medium would include an electrical connection having one or more wires, a portable computer diskette, a hard disk, a random access memory (RAM) , a read-only memory (ROM) , an erasable programmable read-only memory (EPROM or Flash memory) , an optical fiber, a portable compact disc read-only memory (CD-ROM) , an optical storage device, a magnetic storage device, or any suitable combination of the foregoing.

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

Abstract

Des modes de réalisation de la présente divulgation concernent des dispositifs, des procédés et des supports de stockage lisibles par ordinateur permettant de réaliser des économies d'énergie en utilisant un signal à bande étroite. Le procédé comprend la réception, à partir d'un second dispositif, de premières informations de configuration d'une transmission de signal à large bande entre le premier dispositif et le second dispositif; la réception, à partir du second dispositif, de secondes informations de configuration d'une transmission de signal à bande étroite du second dispositif au premier dispositif sur la base des premières informations de configuration; et la transmission d'un message de réponse pour indiquer que le premier dispositif est capable de recevoir le signal à bande étroite. Dans la présente divulgation, le signal à bande étroite est introduit pour économiser de l'énergie. Le dispositif de réseau peut informer le dispositif terminal quant au signal à bande étroite, et le dispositif terminal peut entrer dans le mode à bande étroite basse énergie pour recevoir le signal à bande étroite et retourner au mode à large bande uniquement dans certaines conditions. De cette manière, la consommation d'énergie peut être réduite et le système devient plus rentable.
PCT/CN2019/119432 2019-11-19 2019-11-19 Signalisation à bande étroite pour économie d'énergie WO2021097665A1 (fr)

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