WO2020164028A1 - Commande de puissance dans une transmission en liaison montante - Google Patents

Commande de puissance dans une transmission en liaison montante Download PDF

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Publication number
WO2020164028A1
WO2020164028A1 PCT/CN2019/074998 CN2019074998W WO2020164028A1 WO 2020164028 A1 WO2020164028 A1 WO 2020164028A1 CN 2019074998 W CN2019074998 W CN 2019074998W WO 2020164028 A1 WO2020164028 A1 WO 2020164028A1
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WO
WIPO (PCT)
Prior art keywords
terminal device
transmission power
network device
power
cell
Prior art date
Application number
PCT/CN2019/074998
Other languages
English (en)
Inventor
Chunli Wu
Benoist Sebire
Samuli Turtinen
Original Assignee
Nokia Shanghai Bell Co., Ltd.
Nokia Solutions And Networks Oy
Nokia Technologies 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, Nokia Technologies Oy filed Critical Nokia Shanghai Bell Co., Ltd.
Priority to PCT/CN2019/074998 priority Critical patent/WO2020164028A1/fr
Priority to CN201980085480.7A priority patent/CN113228749A/zh
Publication of WO2020164028A1 publication Critical patent/WO2020164028A1/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
    • H04W52/04—TPC
    • H04W52/30—TPC using constraints in the total amount of available transmission power
    • H04W52/36—TPC using constraints in the total amount of available transmission power with a discrete range or set of values, e.g. step size, ramping or offsets
    • H04W52/367—Power values between minimum and maximum limits, e.g. dynamic range
    • 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
    • H04W52/04—TPC
    • H04W52/06—TPC algorithms
    • H04W52/14—Separate analysis of uplink or downlink
    • H04W52/146—Uplink power control

Definitions

  • Embodiments of the present disclosure generally relate to communication techniques, and more particularly, to methods, devices and computer readable medium for power headroom report.
  • a network device allocates bandwidths and required power for uplink transmission to terminal devices.
  • the terminal devices may report information about the power headroom to the network device.
  • the network device may control power based on the power headroom.
  • Such a power control scheme is generally not so accurate.
  • embodiments of the present disclosure relate to a method for power reduction indication and the corresponding communication devices.
  • inventions of the disclosure provide a terminal device.
  • the terminal device comprises: at least on processor; and a memory coupled to the at least one processor, the memory storing instructions therein, the instructions, when executed by the at least one processor, causing the terminal device to: receive, at the terminal device and from a network device, first information of a required transmission power.
  • the required transmission power is a transmission power required by the network device for the terminal device to perform uplink transmission in a cell managed by the network device.
  • the network device is further caused to compare the required transmission power with a maximum transmission power of the terminal device.
  • the network device is also caused to in response to the required transmission power exceeding the maximum transmission power, transmit, to the network device, second information comprising an indication of power reduction for the uplink transmission in the cell.
  • inventions of the disclosure provide a network device.
  • the network device comprises: at least on processor; and a memory coupled to the at least one processor, the memory storing instructions therein, the instructions, when executed by the at least one processor, causing the network device to. : transmit, at the network device and to a terminal device, first information of a required transmission power.
  • the required transmission power is a transmission power required by the network device for the terminal device to perform uplink transmission in a cell managed by the network device.
  • the network device is also caused to receive, from the terminal device, second information comprising an indication of power reduction for the uplink transmission in the cell.
  • the network device is further caused to perform communication with the terminal device based on the indication.
  • embodiments of the present disclosure provide a method.
  • the method comprises: receiving, at a terminal device and from a network device, first information of a required transmission power.
  • the required transmission power is a transmission power required by the network device for the terminal device to perform uplink transmission in a cell managed by the network device.
  • the method also comprises comparing the required transmission power with a maximum transmission power of the terminal device.
  • the method further comprises in response to the required transmission power exceeding the maximum transmission power, transmitting, to the network device, second information comprising an indication of power reduction for the uplink transmission in the cell.
  • embodiments of the present disclosure provide a method.
  • the method comprises: transmitting, at a network device and to a terminal device, first information of a required transmission power.
  • the required transmission power is a transmission power required by the network device for the terminal device to perform uplink transmission in a cell managed by the network device.
  • the method also comprises receiving, from the terminal device, second information comprising an indication of power reduction for the uplink transmission in the cell.
  • the method further comprises performing communication with the terminal device based on the indication.
  • inventions of the disclosure provide an apparatus.
  • the apparatus comprises means for receiving, at a terminal device and from a network device, first information of a required transmission power.
  • the required transmission power is a transmission power required by the network device for the terminal device to perform uplink transmission in a cell managed by the network device.
  • the apparatus further comprises means for comparing the required transmission power with a maximum transmission power of the terminal device.
  • the apparatus also comprises means for means for in response to the required transmission power exceeding the maximum transmission power, transmitting, to the network device, second information comprising an indication of power reduction for the uplink transmission in the cell.
  • inventions of the disclosure provide an apparatus.
  • the apparatus comprises means for transmitting, at a network device and to a terminal device, first information of a required transmission power.
  • the required transmission power is a transmission power required by the network device for the terminal device to perform uplink transmission in a cell managed by the network device.
  • the apparatus also comprises means for receiving, from the terminal device, second information comprising an indication of power reduction for the uplink transmission in the cell.
  • the apparatus further comprises means for performing communication with the terminal device based on the indication.
  • embodiments of the disclosure provide a computer readable medium.
  • the computer readable medium stores instructions thereon, the instructions, when executed by at least one processing unit of a machine, causing the machine to implement the method according to the third aspect or the fourth aspect.
  • Fig. 1 illustrates a schematic diagram of a PHR Medium Access Control (MAC) Control Element (CE) ;
  • MAC Medium Access Control
  • CE Control Element
  • Fig. 2 illustrates a schematic diagram of a further PHR MAC CE
  • Fig. 3 illustrates a schematic diagram of another PHR MAC CE
  • Fig. 4 illustrates a schematic diagram of a communication system according to embodiments of the present disclosure
  • Fig. 5 illustrates a schematic diagram of interactions among devices according to embodiments of the present disclosure
  • Fig. 6 illustrates a flow chart of a method implemented at a communication device according to embodiments of the present disclosure
  • Fig. 7 illustrates a flow chart of a method implemented at a communication device according to embodiments of the present disclosure
  • Fig. 8 illustrates a schematic diagram of a device according to embodiments of the present disclosure.
  • Fig. 9 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) , New Radio (NR) and so on.
  • LTE Long Term Evolution
  • LTE-A LTE-Advanced
  • WCDMA Wideband Code Division Multiple Access
  • HSPA High-Speed Packet Access
  • NR New Radio
  • 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.
  • the terminal devices may report the power headroom to the network device.
  • Power Headroom Reports are reported by the terminal device to the network to enable efficient scheduling of uplink.
  • the PHR may be triggered by some conditions. For example, the PHR may be triggered by Pathloss (PL) change being above a threshold. Alternatively, the PHR may be triggered by periodic timer expiry.
  • PL Pathloss
  • the terminal device may transmit the PHR for one cell or multiple cells.
  • Fig. 1 illustrates a schematic diagram of a single entry PHR MAC CE.
  • Fig. 2 illustrates a schematic diagram of multiple entries PHR MAC CE with the highest index of a serving cell (also referred to as ServCell Index) with configured uplink less than 8.
  • Fig. 3 illustrates a schematic diagram of multiple entries PHR MAC CE with the highest ServCell Index of a serving cell with configured uplink is equal to or higher than 32. It should be note that the ServCell Index and numbers shown with respect to Figs. 1-3 are only for the purpose of illustrations, rather than limitations.
  • Type 1 Power Headroom is defined as the remaining power depending on Physical Uplink Shared Channel (PUSCH) transmission power
  • type 2 PHR is defined as remaining power depending on PUCCH transmission power
  • type 3 PHR is defined as remaining power depending on SRS transmission.
  • Real and virtual PHR are defined depending on whether there is actual UL transmission on the related channel. Taking Type 1 PHR as an example: If a UE determines that a Type 1 power headroom report for an activated serving cell is based on an actual PUSCH transmission then, for PUSCH transmission occasion i on active uplink (UL) bandwidth part (BWP) b of carrier f of serving cell c, the UE computes the Type 1 power headroom report as below:
  • the PUSCH transmission power is defined as below, which depends on the bandwidth of PUSCH resource allocation pathloss (PL) as well as the accumulated power control command affect. For example, if a UE transmits a PUSCH on active UL BWP b of carrier f of serving cell c using parameter set configuration with indexj and PUSCH power control adjustment state with index l, the UE determines the PUSCH transmission power P PUSCH, b, f, c (i, j, q d , l) in PUSCH transmission occasion i as below:
  • power reduction may happen when the total power exceed the UE power.
  • the UE indicates a capability for dynamic power sharing between E-UTRA and NR for EN-DC and if UE transmission (s) in subframe i 1 of the MCG overlap in time with UE transmission (s) in slot i 2 of the SCG in FR1, and if in any portion of slot i 2 of the SCG, the UE reduces transmission power in any portion of slot i 2 of the SCG so that in any portion of slot i 2 , where and are the linear values of the total UE transmission powers in subframe i 1 of the MCG and in slot i 2 of the SCG in FR1, respectively.
  • the UE is not required to transmit in any portion of slot i 2 of the SCG if would need to be reduced by more than the value provided by X SCALE in order for in any portion of slot i 2 of the SCG.
  • the UE is required to transmit in slot i 2 of the SCG if would not need to be reduced by more than the value provided by X SCALE in order for in all portions of slot i 2
  • the UE indicates a capability for dynamic power sharing between E-UTRA and NR and if the UE transmission (s) in subframe i 1 of the MCG overlap in time with UE transmission (s) in slot i 2 of the SCG in frequency range 1, and if in any portion of slot i 2 of the SCG, the UE reduces transmission power in any portion of slot i 1 of the MCG so that in all portions of slot i 1 , where and are the linear values of the total UE transmission powers in slot i 1 of the MCG in FR1 and in subframe i 2 of the SCG, respectively.
  • the PHR report can be large with carrier aggregation (CA) and/or dual connectivity (DC) configurations.
  • CA carrier aggregation
  • DC dual connectivity
  • the likelihood of a triggered PHR not being able to be included in the MAC PDU increases along with increasing the number of configured carriers.
  • the PHR MAC CE can be over 60 bytes. According to current technologies, the PHR is only included when the whole PHR MAC CE can be included in the PDU.
  • the power headroom (PH) of some cells may be reported when the full PHR cannot fit into the MAC PDU.
  • the network device would not be able to know if current allocation and power control is proper based on the PH of the reported cells even if the PH values indicate there is still power left, since the reduction of transmission power is not taken into account.
  • the terminal device transmits an indication of power reduction to the network device if the terminal device needs to reduce transmission power.
  • the network device performs communication with the terminal device based on the indication of power reduction. In this way, the power reduction is taken into consideration during the power control, and thus the UL scheduling is improved.
  • Fig. 4 illustrates a schematic diagram of a communication system 400 in which embodiments of the present disclosure can be implemented.
  • the communication system 400 which is a part of a communication network, comprises terminal devices 410-1, 410-2, ..., 410-N (collectively referred to as “terminal device (s) 410” where N is an integer number) .
  • the communication system 400 comprises one or more network devices, for example, network devices 420-1, 420-2, ..., 420-M (collectively referred to as “network device (s) 420” where M is an integer number) .
  • the communication system 400 may also comprise other elements which are omitted for the purpose of clarity. It is to be understood that the numbers of terminal devices and network devices shown in Fig. 4 are given for the purpose of illustration without suggesting any limitations.
  • the network device 420 may communicate with the terminal devices 410.
  • Communications in the communication system 400 may be implemented according to any proper communication protocol (s) , including, but not limited to, cellular communication protocols of the first generation (1G) , the second generation (2G) , the third generation (3G) , the fourth generation (4G) and the fifth generation (5G) and on the like, wireless local network communication protocols such as Institute for Electrical and Electronics Engineers (IEEE) 802.11 and the like, and/or any other protocols currently known or to be developed in the future.
  • s including, but not limited to, cellular communication protocols of the first generation (1G) , the second generation (2G) , the third generation (3G) , the fourth generation (4G) and the fifth generation (5G) and on the like, wireless local network communication protocols such as Institute for Electrical and Electronics Engineers (IEEE) 802.11 and the like, and/or any other protocols currently known or to be developed in the future.
  • IEEE Institute for Electrical and Electronics Engineers
  • the communication may utilize any proper wireless communication technology, including but not limited to: Code Divided Multiple Address (CDMA) , Frequency Divided Multiple Address (FDMA) , Time Divided Multiple Address (TDMA) , Frequency Divided Duplexer (FDD) , Time Divided Duplexer (TDD) , Multiple-Input Multiple-Output (MIMO) , Orthogonal Frequency Divided Multiple Access (OFDMA) and/or any other technologies currently known or to be developed in the future.
  • CDMA Code Divided Multiple Address
  • FDMA Frequency Divided Multiple Address
  • TDMA Time Divided Multiple Address
  • FDD Frequency Divided Duplexer
  • TDD Time Divided Duplexer
  • MIMO Multiple-Input Multiple-Output
  • OFDMA Orthogonal Frequency Divided Multiple Access
  • Fig. 5 illustrates a schematic diagram of interactions 500 in accordance with embodiments of the present disclosure.
  • the interactions 500 may be implemented at any suitable devices. Only for the purpose of illustrations, the interactions 500 are described to be implemented at the terminal device 410-1 and the network device 420-1.
  • the network device 420-1 transmits 505 first information of required transmission power.
  • the required power is required by the network device for performing uplink transmission.
  • the first information may indicate the required power for one cell 430-1 which is managed by the network device 420-1.
  • the first information may indicate the required power for several cells, for example, cells 430-1 and 430-2.
  • the cells 430-1 and 430-2 may be managed by the network device 420-1.
  • the cells 430-1 and 430-2 may be managed by different network devices, for example, the network devices 420-1 and 420-2.
  • the terminal device 410-1 compares 510 the required transmission power with a maximum transmission power of the terminal device 410-1.
  • the maximum transmission power is the power that the terminal device 410-1 is able to provide for uplink transmissions.
  • the terminal device 410-1 determines that the required transmission power exceeds the maximum transmission power, the terminal device 410-1transmits 515 second information to the network device 420-1.
  • the second information comprises an indication of power reduction.
  • the indication of power reduction may be transmitted using reserved bit (s) from Pcmax, c octet.
  • the second information may be transmitted via the PHR.
  • the power reduction may trigger a PHR.
  • the second information may indicate per serving cell whether power scaling is applied for each serving cell with PH reported. In this way, the power reduction/scaling is transmitted to the network device for further power control.
  • the terminal device 410-1 may determine 520 which cell (s) and/or channel (s) is to perform power reduction based on predetermined rules. For example, if the cell 430-1 is a primary cell and the cell 430-2 is a secondary cell, the terminal device 410-1 may reduce 525 the transmission power on the cell 430-2.
  • the terminal device 410-1 may reduce 525 the transmission power on the cell 430-2.
  • LTE long-term evolution
  • NR new radio
  • the channels may comprise a plurality of channels, for example, one or more of: PUSCH, physical uplink control channel (PUCCH) and physical random access channel (PRACH) . If the required power exceeds the maximum transmission power, the terminal device 410-1 may reduce 525 transmission power on the PUSCH other than PUCCH/PRACH based on their priorities.
  • PUSCH physical uplink control channel
  • PRACH physical random access channel
  • the network device 420-1 performs 530 communication with the terminal device 410-1 based on the received indication of power reduction.
  • the network device 420-1 may perform UL scheduling based on the indication.
  • the network device 420-1 may reduce PUSCH allocation bandwidth to the terminal device 410-1.
  • the network device 420-1 may not transmit power control command to increase/decrease the transmission power to the terminal device 410-1.
  • Fig. 6 illustrates a flow chart of a method 600 in accordance with embodiments of the present disclosure.
  • the method 600 may be implemented at any suitable devices. Only for the purpose of illustrations, the method 600 is described to be implemented at the terminal device 410-1.
  • the terminal device 410-1 receives first information of a required transmission power.
  • the required transmission power is required by the network device for performing uplink transmission.
  • the first information may indicate the required power for one cell 430-1 which is managed by the network device 420-1.
  • the first information may indicate the required power for several cells, for example, cells 430-1 and 430-2.
  • the terminal device 410-1 compares the required transmission power with a maximum transmission power of the terminal device 410-1.
  • the maximum transmission power is the power that the terminal device 410-1 is able to provide for uplink transmissions.
  • the terminal device 410-1 transmits, at block 630, second information to the network device 420-1.
  • the second information comprises an indication of power reduction.
  • the indication of power reduction may be transmitted using reserved bit (s) from P cmax, c octet in PHR.
  • the power reduction may trigger a PHR.
  • the second information may indicate per serving cell whether power scaling is applied for each serving cell with PH reported. In this way, the power reduction/scaling is transmitted to the network device for further power control.
  • the terminal device 410-1 may determine which cell (s) is to perform power reduction based on predetermined rules, for example, priorities. For example, if the cell 430-1 is a primary cell and the cell 430-2 is a secondary cell, the terminal device 410-1 may reduce the transmission power on the cell 430-2.
  • the terminal device 410-1 may reduce the transmission power on the cell 430-2.
  • LTE long-term evolution
  • NR new radio
  • the PHR when power reduction needs to be performed by the terminal device, the PHR may be triggered to be transmitted to the network device.
  • the power headroom report is triggered in case power reduction needs to be applied for multiple serving cells or threshold number of serving cells where such threshold number could be configurable by the network devices.
  • the power headroom report is triggered in case power reduction is applied for PCell, PSCell, and/or SCell (s) .
  • the present disclosure introduces truncated PHR to enable reporting partial PHR when the full PHR MAC CE cannot fit into the MAC PDU.
  • the truncated PHR may not cancel the triggered PHR and it may remain pending until the full report can be multiplexed into a MAC PDU.
  • the truncated PHR can also indicate explicitly that PHR was triggered but did not fit to the available resources (for example, in case it is included when padding is available) . For instance, with a different logical channel identify (LCID) or the reserved bit in the bitmap in the multiple entry PHR format may be used for this purpose or one of the reserved bits before power headroom (PH) value in the single entry PHR format.
  • LCID logical channel identify
  • PH power headroom
  • the terminal device 410-1 may set the bit in the bitmap for every activated serving cell (as currently) but reports the PH for as many as it can fit before the available bytes in the MAC PDU are exhausted.
  • the terminal device 410-1 may report the cells based on strict priority rules based on which the network device determines which serving cells are actually reported. This is especially useful to give the network device knowledge of how many serving cells are activated in the other cell group in dual connectivity, for instance.
  • reporting the cells having real PUSCH transmission may be prioritized since the power reduction only happens for the cells with real PUSCH transmissions.
  • the terminal device 410-1 may transmit PHR for the cells where power reduction is applied rather than the cells without power reduction.
  • some of the rules for truncated PHR may be applicable to regular triggered PHR as well, for example, rules on explicit configurations of a subset of cells to be reported in the PHR or explicitly configured only a subset of cells are to be reported in PHR.
  • the cells to be reported in the truncated PHR may be selected with one or more of the following rules:
  • the cells within the same MAC entity that is, the same cell group
  • are prioritized over cells of the other MAC entity i.e. the other cell group
  • PH type/value e.g. real/virtual, type 1/2/3: (a) The cells with actual UL transmission resources at the time the PHR is transmitted are prioritized, that is, the cells with real PH reported, not the ones with virtual PHR; (b) Type 1 PH is prioritized over Type 3 for any cell; (c) The cells with applied or not applied power backoff are prioritized; (d) The cells with lowest PH value are prioritized; (e) The cells with a PH that has changed the most compared to the last PHR are prioritized;
  • cell index or frequency/band of the cell (a) Ascending/descending order of the cell index.
  • the cells with lowest serving cell indices (to be able to use 8 bit bitmap multiple entry PHR format instead of 32 bit bitmap multiple entry PHR format) are prioritized;
  • Ascending/descending order of the frequency/band of the cells One cell per band, the cell with lowest/highest cell index within each band is reported;
  • the terminal device 410-1 may perform uplink transmission only in one cell.
  • the terminal device 410-1 may determine on which channel (s) the power reduction is performed base on predetermined rules.
  • the channels may comprise a plurality of channels, for example, one or more of: PUSCH, physical uplink control channel (PUCCH) and physical random access channel (PRACH) . If the required power exceeds the maximum transmission power, the terminal device 410-1 may determine to reduce transmission power on the PUSCH other than PUCCH/PRACH based on their priorities.
  • the second information may also comprise the amount of the power reduction.
  • the amount of the power reduction may be transmitted using the PH field. In other embodiments, the amount of power reduction may be transmitted using the PCmax field. In this way, the network device knows the amount of the power reduction which is used to improve power scheduling.
  • the second information may also comprise the cause for the power reduction.
  • the cause may comprise overheating.
  • the cause may comprise TX over another cell group/MAC entity.
  • the network device has information of the transmission conditions, thereby improving the transmissions between the network device and the terminal device.
  • an apparatus for performing the method 600 may comprise respective means for performing the corresponding steps in the method 600.
  • These means may be implemented in any suitable manners. For example, it can be implemented by circuitry or software modules.
  • the apparatus comprises means for receiving, at a terminal device and from a network device, first information of a required transmission power, the required transmission power being a transmission power required by the network device for the terminal device to perform uplink transmission in a cell managed by the network device; means for comparing the required transmission power with a maximum transmission power of the terminal device; and means for in response to the required transmission power exceeding the maximum transmission power, transmitting, to the network device, second information comprising an indication of power reduction for the uplink transmission in the cell.
  • the second information further comprises at least one of: an amount of the power reduction, and a cause for the power reduction.
  • the apparatus further comprises: means for determining a priority of the cell based on a type of the cell; and means for in response to the priority of the cell being higher than a priority of a further cell managed by the network device, reducing a transmission power of the terminal device in the further cell.
  • the apparatus further comprises: means for determining first and second priorities of first and second channels used by the terminal device in the cell based on types of the first and second channels; and means for in response to the first priority being higher than the second priority, reducing a transmission power of the terminal device on the second channel.
  • the second information is transmitted in a power headroom report (PHR) .
  • PHR power headroom report
  • Fig. 7 illustrates a flow chart of a method 700 in accordance with embodiments of the present disclosure.
  • the method 700 may be implemented at any suitable devices. Only for the purpose of illustrations, the method 700 is described to be implemented at the network device 420-1.
  • the network device 420-1 transmits first information of required transmission power.
  • the required power is required by the network device for performing uplink transmission.
  • the first information may indicate the required power for one cell 430-1 which is managed by the network device 420-1.
  • the first information may indicate the required power for several cells, for example, cells 430-1 and 430-2.
  • the network device 420-1 receives second information comprising an indication of power reduction for the transmission in the cell.
  • the second information comprises an indication of power reduction.
  • the indication of power reduction may be transmitted using reserved bit (s) from P cmax, c octet.
  • the second information may be received via the PHR.
  • the second information may indicate that power scaling is applied for each serving cell with PH reported. In this way, the network device knows power reduction happened.
  • the second information may also comprise the amount of the power reduction.
  • the amount of the power reduction may be transmitted using the PH value. In other embodiments, the amount of power reduction may be transmitted using the PCmax field.
  • the second information may also comprise the cause for the power reduction.
  • the cause may comprise overheating.
  • the cause may comprise TX over another cell group/MAC entity. In this way, the network device also knows the reason for the power reduction.
  • the network device 420-1 performs communication with the terminal device 410-1 based on the indication.
  • the network device 420-1 may perform power scheduling based on the indication.
  • the network device 420-1 may reduce PUSCH allocation bandwidth to the terminal device 410-1.
  • the network device 420-1 may not transmit power control command to increase the transmission power to the terminal device 410-1.
  • an apparatus for performing the method 600 may comprise respective means for performing the corresponding steps in the method 600.
  • These means may be implemented in any suitable manners. For example, it can be implemented by circuitry or software modules.
  • the apparatus comprises means for transmitting, at a network device and to a terminal device, first information of a required transmission power, the required transmission power being a transmission power required by the network device for the terminal device to perform uplink transmission in a cell managed by the network device; means for receiving, from the terminal device, second information comprising an indication of power reduction for the uplink transmission in the cell; and means for performing communication with the terminal device based on the indication.
  • the second information further comprises at least one of: an amount of the power reduction, and a cause for the power reduction.
  • the means for performing communication with the terminal device comprises: means for reducing physical uplink shared channel (PUSCH) allocation bandwidth for the terminal device.
  • PUSCH physical uplink shared channel
  • the second information is received in a power headroom report (PHR) .
  • PHR power headroom report
  • Fig. 8 is a simplified block diagram of a device 800 that is suitable for implementing embodiments of the present disclosure.
  • the device 800 may be implemented at the network device 120.
  • the device 800 may also be implemented at the terminal devices 110.
  • the device 800 includes one or more processors 810, one or more memories 820 coupled to the processor (s) 810, one or more transmitters and/or receivers (TX/RX) 840 coupled to the processor 810.
  • the processor 810 may be of any type suitable to the local technical network, and may include one or more of general purpose computers, special purpose computers, microprocessors, digital signal processors (DSPs) and processors based on multicore processor architecture, as non-limiting examples.
  • the device 800 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 820 may be of any type suitable to the local technical network and may be implemented using any suitable data storage technology, such as a non-transitory computer readable storage medium, semiconductor based memory devices, magnetic memory devices and systems, optical memory devices and systems, fixed memory and removable memory, as non-limiting examples.
  • the memory 820 stores at least a part of a program 830.
  • the device 800 may load the program 830 from the computer readable medium to the RAM 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. 9 shows an example of the computer readable medium 800 in form of CD or DVD.
  • the computer readable medium has the program 830 stored thereon.
  • the TX/RX 840 is for bidirectional communications.
  • the TX/RX 840 has at least one antenna to facilitate communication, though in practice an Access Node mentioned in this application may have several ones.
  • the communication interface may represent any interface that is necessary for communication with other network elements.
  • the program 830 is assumed to include program instructions that, when executed by the associated processor 810, enable the device 800 to operate in accordance with the embodiments of the present disclosure, as discussed herein with reference to Figs. 5 and 7. That is, embodiments of the present disclosure can be implemented by computer software executable by the processor 810 of the device 800, or by hardware, or by a combination of software and hardware.

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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 invention concernent un procédé, un dispositif et un support lisible par ordinateur pour l'indication de la réduction de puissance. Selon des modes de réalisation de la présente invention, le dispositif terminal transmet une indication de réduction de puissance au dispositif réseau si le dispositif terminal a besoin de réduire la puissance de transmission. Le dispositif réseau réalise une communication avec le dispositif terminal sur la base de l'indication de réduction de puissance. De cette manière, la commande de puissance est améliorée du fait de la prise en considération de la réduction de puissance.
PCT/CN2019/074998 2019-02-13 2019-02-13 Commande de puissance dans une transmission en liaison montante WO2020164028A1 (fr)

Priority Applications (2)

Application Number Priority Date Filing Date Title
PCT/CN2019/074998 WO2020164028A1 (fr) 2019-02-13 2019-02-13 Commande de puissance dans une transmission en liaison montante
CN201980085480.7A CN113228749A (zh) 2019-02-13 2019-02-13 上行链路传输中的功率控制

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
PCT/CN2019/074998 WO2020164028A1 (fr) 2019-02-13 2019-02-13 Commande de puissance dans une transmission en liaison montante

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WO2020164028A1 true WO2020164028A1 (fr) 2020-08-20

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CN (1) CN113228749A (fr)
WO (1) WO2020164028A1 (fr)

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN101711054A (zh) * 2009-12-21 2010-05-19 北京北方烽火科技有限公司 一种lte上行功率控制方法及系统
WO2011050921A1 (fr) * 2009-11-02 2011-05-05 Panasonic Corporation Rapport de la limite de puissance dans un système de communication utilisant une agrégation de porteuses
EP3051889A1 (fr) * 2013-09-26 2016-08-03 ZTE Corporation Procédé et dispositif de traitement d'extraction de puissance en liaison montante, terminal et station de base

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2011050921A1 (fr) * 2009-11-02 2011-05-05 Panasonic Corporation Rapport de la limite de puissance dans un système de communication utilisant une agrégation de porteuses
CN101711054A (zh) * 2009-12-21 2010-05-19 北京北方烽火科技有限公司 一种lte上行功率控制方法及系统
EP3051889A1 (fr) * 2013-09-26 2016-08-03 ZTE Corporation Procédé et dispositif de traitement d'extraction de puissance en liaison montante, terminal et station de base

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