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WO2013008153A2 - Procédé et appareil de régulation de puissance de transmission - Google Patents

Procédé et appareil de régulation de puissance de transmission Download PDF

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Publication number
WO2013008153A2
WO2013008153A2 PCT/IB2012/053443 IB2012053443W WO2013008153A2 WO 2013008153 A2 WO2013008153 A2 WO 2013008153A2 IB 2012053443 W IB2012053443 W IB 2012053443W WO 2013008153 A2 WO2013008153 A2 WO 2013008153A2
Authority
WO
WIPO (PCT)
Prior art keywords
transmission power
calculated
minimum
calculating
maximum
Prior art date
Legal status (The legal status 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 status listed.)
Ceased
Application number
PCT/IB2012/053443
Other languages
English (en)
Other versions
WO2013008153A3 (fr
Inventor
Petteri Kalle Kela
Tommi Tapani Kangassuo
Petteri Mika Heinonen
Jonathan KEAST
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Renesas Electronics Corp
Original Assignee
Renesas Mobile Corp
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
Priority claimed from US13/178,808 external-priority patent/US20130010706A1/en
Priority claimed from GB201111744A external-priority patent/GB2492600B/en
Application filed by Renesas Mobile Corp filed Critical Renesas Mobile Corp
Publication of WO2013008153A2 publication Critical patent/WO2013008153A2/fr
Publication of WO2013008153A3 publication Critical patent/WO2013008153A3/fr
Anticipated expiration legal-status Critical
Ceased legal-status Critical Current

Links

Classifications

    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W52/00—Power management, e.g. Transmission Power Control [TPC] or power classes
    • H04W52/04—Transmission power control [TPC]
    • H04W52/30—Transmission power control [TPC] using constraints in the total amount of available transmission power
    • H04W52/36—Transmission power control [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. Transmission Power Control [TPC] or power classes
    • H04W52/04—Transmission power control [TPC]
    • H04W52/18—TPC being performed according to specific parameters
    • H04W52/26—TPC being performed according to specific parameters using transmission rate or quality of service QoS [Quality of Service]
    • H04W52/267—TPC being performed according to specific parameters using transmission rate or quality of service QoS [Quality of Service] taking into account the information rate
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W52/00—Power management, e.g. Transmission Power Control [TPC] or power classes
    • H04W52/04—Transmission power control [TPC]
    • H04W52/30—Transmission power control [TPC] using constraints in the total amount of available transmission power
    • H04W52/32—TPC of broadcast or control channels
    • H04W52/325—Power control of control or pilot channels
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W52/00—Power management, e.g. Transmission Power Control [TPC] or power classes
    • H04W52/04—Transmission power control [TPC]
    • H04W52/06—TPC algorithms
    • H04W52/14—Separate analysis of uplink or downlink
    • H04W52/146—Uplink power control

Definitions

  • the present application relates generally to an apparatus and method for controlling transmission power.
  • the invention has particular application to uplink transmission power control in discontinuous data transfer.
  • E-UTRAN Evolved Universal Terrestrial Radio Access Network
  • M PUSCH is me bandwidth of the PUSCH resource assignment expressed in number of resource blocks valid for subframe i.
  • C is the number of code blocks
  • K r is the size for code block r
  • 0 CQI is the number of CQI bits including CRC bits
  • N RE is the number of resource elements determined as PUSCH -initial PUSCH -initial
  • ⁇ 5 p usc H is a UE-specific correction value, also referred to as a TPC command and is included in PDCCH with DCI format 0 or jointly coded with other TPC commands in PDCCH with DCI format 3/3A whose CRC parity bits are scrambled with TPC-PUSCH-RNTI.
  • K PUSCH is given in Table 5.1.1.1-1 in document [1].
  • the UE attempts to decode a PDCCH of DCI format 0 with the UE's C-RNTI or SPS C-RNTI and a PDCCH of DCI format 3/3 A with this UE ' s TPC-PUSCH-RNTI in every subframe except when in DRX
  • DCI format 0 and DCI format 3/3 A are both detected in the same subframe, then the UE shall use the ⁇ 5 PUSCH provided in DCI format 0.
  • ⁇ 5pusc H 0 dB for a subframe where no TPC command is decoded or where DRX occurs or i is not an uplink subframe in TDD.
  • ⁇ 5 PUSCH dB accumulated values signalled on PDCCH with DCI format 0 are given in Table 5.1.1.1-2 in document [1]. If the PDCCH with DCI format 0 is validated as a SPS activation or release PDCCH, then ⁇ 5 PUSCH is OdB.
  • the ⁇ 5 PUSCH dB accumulated values signalled on PDCCH with DCI format 3/3 A are one of SETl given in Table 5.1.1.1-2 in document [ 1 ] or SET2 given in Table 5.1.1.1-3 in document [ 1 ] as determined by the parameter TPC-Index provided by higher layers.
  • TPC commands shall not be accumulated ⁇ If UE has reached minimum power, negative TPC commands shall not be accumulated
  • K PUSCH is given in Table 5.1.1.1-1 in document [1].
  • K PUSCH ⁇ 7 o For all other PUSCH transmissions, K PUSCH is given in Table 5.1.1.1-1 in document [ 1 ] .
  • f(i) is the current power control adjustment state accumulated from received TPC commands.
  • TPC commands shall not be accumulated to the current power control adjustment state in certain situations. Namely:
  • the parameter PUSCH (z ' ) is needed, which is a resource allocation-dependent parameter.
  • P USCH is the bandwidth of the PUSCH resource assignment expressed in number of resource blocks valid for subframe i.
  • ⁇ PUCCH min [ P CMAX , ⁇ O PUCCH + pl + h(n CQI , n HARQ )+ A F PUCCH (F)+ g(i) ⁇ [dBm]
  • P CMAX is the configured UE transmitted power.
  • Each ⁇ ⁇ PUCC H (-F) value corresponds to a PUCCH format (F) relative to PUCCH format l a, where each PUCCH format (F ) is defined in Table 5.4-1 of 3GPP TS 36.211.
  • h (n CQI , II HAR Q ) is a PUCCH format dependent value, where n CQ1 corresponds to the number of information bits for the channel quality information and n HARQ is the number of HARQ bits.
  • puccH is a parameter composed of the sum of a cell-specific parameter po NOMINAL PUCCH provided by higher layers and a UE-specific component P 0 UE PUCCH provided by higher layers.
  • • ⁇ 5pucc H is a UE-specific correction value, also referred to as a TPC command, included in a PDCCH with DCI format 1A/1B/1D/1/2A/2/2B or sent jointly coded with other UE-specific PUCCH correction values on a PDCCH with DCI format 3/3A whose CRC parity bits are scrambled with TPC-PUCCH- RNTI.
  • the UE attempts to decode a PDCCH of DCI format 3/3A with the UE's TPC-PUCCH-RNTI and one or several PDCCHs of DCI format 1A/1B/1D/1/2A/2/2B with the UE's C-RNTI or SPS C-RNTI on every subframe except when in DRX.
  • the UE shall use the ⁇ 5 PUCCH provided in that PDCCH. else
  • ⁇ g(i) g(i - l) if i is not an uplink subframe in TDD.
  • the network may send TPC commands for PUCCH in DCI format 3/3A even if there is no PUCCH transmissions occurring.
  • the setting of the UE Transmit power i3 ⁇ 4 RS for the Sounding Reference Symbol transmitted on subframe i is defined by:
  • 3 ⁇ 4s ( min ⁇ i > CMAX , 3 ⁇ 4s O FF S ET + 101og 10 ( SRS ) + /0 p USCH (j) + a(j) - PL + f(i) ⁇ [dBm]
  • - ⁇ SRS OFFSET is a 4-bit UE specific parameter semi- statically configured by higher layers with ldB step size in the range [-3, 12] dB.
  • SRS OFFSET is a 4-bit UE specific parameter semi- statically configured by higher layers with 1.5 dB step size in the range [-10.5,12] dB
  • M SRS is me bandwidth of the SRS transmission in subframe i expressed in number of resource blocks.
  • a TPC command for PUSCH can be included in PDCCH with DCI format 0 or jointly coded with other TPC commands in PDCCH with DCI format 3/3A whose CRC parity bits are scrambled with TPC-PUSCH-R TI.
  • a TPC command is received in PDCCH with DCI format 3/3A, there may be a case in which a PUSCH resource assignment is not received for the same subframe in DCI format 0.
  • the UE shall adjust the uplink power control state accordingly. This requires certain parameters to calculate the limits for accumulation when transmission power has reached the maximum or minimum power.
  • the UE receives a TPC command for PUCCH, it shall adjust the uplink power control state accordingly. This requires certain parameters to calculate the limits for accumulation.
  • a method for controlling transmission power comprising: calculating, on a processor at a user equipment, a transmission power based on currently used bandwidth, and checking, on the processor at the user equipment, whether a transmission power limit has been reached by the calculated transmission power.
  • apparatus for controlling transmission power comprising: a processing system constructed and arranged to cause: a user equipment to calculate a transmission power based on currently used bandwidth, and the user equipment to check whether a transmission power limit has been reached by the calculated transmission power.
  • the processing system may comprise at least one processor and at least one memory including computer program code.
  • apparatus for controlling transmission power comprising: a processing system constructed and arranged to: calculate a transmission power based on channel format and bit number dependent values, and check whether a transmission power limit has been reached based on the calculated transmission power.
  • a method for controlling transmission power comprising: calculating a transmission power based on channel format and bit number dependent values, and checking whether a transmission power limit has been reached based on the calculated transmission power.
  • the bit number dependent values may be based on for example a number of information bits for channel quality information. Alternatively or additionally, the bit number dependent values may be based on for example a number of HARQ bits (which may for example be 1 or 2 depending on the number of codewords or blocks present).
  • Fig. 1 shows a signalling diagram for a method for calculating the transmission power
  • Fig. 2 shows a diagram illustrating a change of transmission power over time
  • Fig. 3 shows a diagram illustrating a change of transmission power over time where the transmission power reaches a maximum transmission power
  • Fig. 4 shows a diagram illustrating a change of transmission power over time where the transmission power reaches a minimum transmission power
  • Fig. 5 shows schematically an example of an apparatus according to certain embodiments of the present invention
  • Fig. 6 shows a schematic flowchart of an example of a method according to certain embodiments of the present invention.
  • Wireless devices include in general any device capable of connecting wirelessly to a network, and includes in particular mobile devices including mobile or cell phones (including so-called “smart phones”), personal digital assistants, pagers, tablet and laptop computers, content-consumption or generation devices (for music and/or video for example), data cards, USB dongles, etc., as well as fixed or more static devices, such as personal computers, game consoles and other generally static entertainment devices, various other domestic and non-domestic machines and devices, etc.
  • the term “user equipment” or UE is often used to refer to wireless devices in general, and particularly mobile wireless devices.
  • the UE of specific embodiments calculates its uplink transmission power and the eNodeB can adjust the UEs transmission power by sending Transmission Power Control (TPC) commands that accumulate to the power control adjustment state used in the calculation, with the behaviour of the power control adjustment state being changed as described herein.
  • Fig. 1 illustrates a method for calculating a transmission power. As shown in
  • the UE first calculates the transmission power and uses the calculated transmission power for signalling on shared/control channels, i.e. PUSCH or PUCCH. Additionally, transmission power can be calculated for the Sounding Reference Symbol (SRS) transmission. Then, the base station sends to the UE a TPC command. Based on the TPC command, the UE re-calculates the transmission power and uses the re-calculated transmission power for PUSCH, PUCCH and SRS signalling.
  • shared/control channels i.e. PUSCH or PUCCH.
  • SRS Sounding Reference Symbol
  • Fig. 2 illustrates the change of the transmission power over time.
  • the TPC command is added to the current transmission power and thus the transmission power rises.
  • Fig. 3 shows a case in which the transmission power reaches a maximum transmission power.
  • the TPC commands i.e. the power control adjustment state
  • the TPC commands cannot be accumulated to the transmission power, once the maximum transmission power has been reached.
  • TPC commands are not accumulated when the power calculation has reached the maximum power limit.
  • Fig. 4 shows a case in which the transmission power reaches a minimum transmission power.
  • the TPC commands i.e. the power control adjustment state
  • the TPC commands cannot be accumulated to the transmission power if the minimum transmission power has been reached.
  • TPC commands are not accumulated when power calculation has reached the minimum power limit.
  • the transmission power for PUSCH can be calculated based on a predefined resource block assignment for currently used bandwidth.
  • the predetermined resource block assignment is, for example, a minimum/maximum resource block assignment.
  • the minimum resource block assignment can be used. Further, when checking if minimum power limit has been reached, the maximum resource block assignment can be used.
  • TPC commands for PUSCH can be based on SRS transmissions.
  • PUSCH (z ' ) is needed.
  • M FlJSCH (z) is not received.
  • a predefined bandwidth-dependent value is used.
  • the value can be for example a maximum or minimum value for resource block assignment. That is, when checking if the maximum transmission power limit has been reached, a minimum resource block assignment can be used for example, and when checking if the minimum transmission power limit has been reached, a maximum resource block assignment can be used for example.
  • the latest resource block assignment for PUSCH is used in the calculation.
  • the latest calculated PUSCH transmission power accumulated with received TPC command is used.
  • a base station can safely update accumulated power control adjustment with DCI formats 3 and 3A without granting uplink allocations to the UE.
  • the UE can properly limit power control adjustment accumulation so that the predicted calculated transmission power does not cross its limits even when resource block allocations are not received.
  • predefined PUCCH format and bit number dependent values are used.
  • the values can be such that they will result in the maximum or minimum value for h and forA p PUCCH (.F) . That is, when checking if the maximum transmission power limit has been reached, minimum values for h and ⁇ ⁇ PUCCH (.F) can be used for example, and when checking if the minimum transmission power limit has been reached, maximum values can be used for example.
  • the latest h and ⁇ ⁇ PUCCH (.F) values for PUCCH in the calculation are used.
  • the latest calculated PUCCH transmission power accumulated with received TPC command is used.
  • Fig. 5 shows schematically an example of an apparatus according to certain embodiments of the present invention.
  • the example apparatus 10 comprises at least one processor 11 and at least one memory 12 including computer program code, the at least one memory and the computer program code being configured to, with the at least one processor, cause the apparatus at least to perform calculating a transmission power based on currently used bandwidth, and checking whether a transmission power limit has been reached based on the calculated transmission power.
  • the at least one memory and the computer program code are further configured to, with the at least one processor, cause the apparatus to perform calculation a transmission power based on channel format and bit number dependent values.
  • the apparatus may comprise a transceiver unit (not shown) configured to receive a TPC command from a base station and to send various data to the base station.
  • a transceiver unit (not shown) configured to receive a TPC command from a base station and to send various data to the base station.
  • Fig. 6 shows a schematic flowchart of an example of a method according to certain embodiments of the present invention. That is, as shown in Fig. 6, this example method comprises calculating, at step S21 , a transmission power based on currently used bandwidth or based on channel format and bit number dependent values, and checking, at step S22, whether a transmission power limit has been reached based on the calculated transmission power. Additionally, the method may include receiving (not shown) a TPC command from a base station and sending (not shown) various data to the base station.
  • any method step is suitable to be implemented as software or by hardware without changing the idea of the embodiments and its modification in terms of the functionality implemented;
  • CMOS Complementary MOS
  • BiMOS Bipolar MOS
  • BiCMOS Bipolar CMOS
  • ECL emitter Coupled Logic
  • TTL Transistor-Transistor Logic
  • ASIC Application Specific IC
  • FPGA Field-programmable Gate Arrays
  • CPLD Complex Programmable Logic Device
  • DSP Digital Signal Processor
  • - devices, units or means e.g. the above-defined apparatuses and user equipments, or any one of their respective units/means
  • devices, units or means can be implemented as individual devices, units or means, but this does not exclude that they are implemented in a distributed fashion throughout the system, as long as the functionality of the device, unit or means is preserved;
  • an apparatus may be represented by a semiconductor chip, a chipset, or a (hardware) module comprising such chip or chipset; this, however, does not exclude the possibility that a functionality of an apparatus or module, instead of being hardware implemented, be implemented as software in a (software) module such as a computer program or a computer program product comprising executable software code portions for execution/being run on a processor or on several processors;
  • a device may be regarded as an apparatus or as an assembly of more than one apparatus, whether functionally in cooperation with each other or functionally independently of each other but in a same device housing, for example.
  • respective functional blocks or elements according to above-described aspects can be implemented by any known means, either in hardware and/or software, respectively, if it is adapted to perform the described functions of the respective parts.
  • the mentioned method steps can be realized in individual functional blocks or by individual devices, or one or more of the method steps can be realized in a single functional block or by a single device.
  • any method step is suitable to be implemented as software or by hardware without changing the idea of the present invention.
  • Devices and means can be implemented as individual devices, but this does not exclude that they are implemented in a distributed fashion throughout the system, as long as the functionality of the device is preserved. Such and similar principles are to be considered as known to a skilled person.
  • Software in the sense of the present description comprises software code as such comprising code means or portions or a computer program or a computer program product for performing the respective functions, as well as software (or a computer program or a computer program product) embodied on a tangible medium such as a computer-readable (storage) medium having stored thereon a respective data structure or code means/portions or embodied in a signal or in a chip, potentially during processing thereof.
  • a tangible medium such as a computer-readable (storage) medium having stored thereon a respective data structure or code means/portions or embodied in a signal or in a chip, potentially during processing thereof.

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

Abstract

L'invention concerne un procédé et un appareil de régulation de puissance de transmission en liaison montante dans un transfert de données discontinu. Une puissance de transmission est calculée en fonction de la bande passante (S21) actuellement utilisée, et une vérification est effectuée pour savoir si une limite de puissance de transmission a été atteinte en fonction de la puissance de transmission (S22) calculée.
PCT/IB2012/053443 2011-07-08 2012-07-05 Procédé et appareil de régulation de puissance de transmission Ceased WO2013008153A2 (fr)

Applications Claiming Priority (4)

Application Number Priority Date Filing Date Title
GB1111744.7 2011-07-08
US13/178,808 2011-07-08
US13/178,808 US20130010706A1 (en) 2011-07-08 2011-07-08 Uplink Power Control Adjustment State In Discontinuos Data Transfer
GB201111744A GB2492600B (en) 2011-07-08 2011-07-08 Method and apparatus for controlling transmission power

Publications (2)

Publication Number Publication Date
WO2013008153A2 true WO2013008153A2 (fr) 2013-01-17
WO2013008153A3 WO2013008153A3 (fr) 2013-05-23

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Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2014194522A1 (fr) * 2013-06-08 2014-12-11 Telefonaktiebolaget L M Ericsson (Publ) Suppression de brouillage de liaison montante dans un réseau de communication sans fil
CN105917710A (zh) * 2014-01-14 2016-08-31 株式会社Ntt都科摩 用户终端、无线基站以及无线通信方法

Family Cites Families (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US7769407B2 (en) * 2004-04-30 2010-08-03 Nokia Corporation System, apparatus, computer program product and method for controlling terminal output power
US8055294B2 (en) * 2009-04-07 2011-11-08 Lg Electronics Inc. Control of uplink transmit power
US8688163B2 (en) * 2009-12-30 2014-04-01 Qualcomm Incorporated Interaction between accumulative power control and minimum/maximum transmit power in LTE systems

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
"3rd Generation Partnership Project; Technical Specification Group Radio Access Network; Evolved Universal Terrestrial Radio Access (E-UTRA); Physical layer procedures (Release 9", 3GPP, TECHNICAL SPECIFICATION 36.213 V9.3.0, September 2010 (2010-09-01)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2014194522A1 (fr) * 2013-06-08 2014-12-11 Telefonaktiebolaget L M Ericsson (Publ) Suppression de brouillage de liaison montante dans un réseau de communication sans fil
US9392559B2 (en) 2013-06-08 2016-07-12 Telefonaktiebolaget Lm Ericsson (Publ) Uplink interference suppression in a wireless communication network
CN105917710A (zh) * 2014-01-14 2016-08-31 株式会社Ntt都科摩 用户终端、无线基站以及无线通信方法

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