WO2015023297A1 - Procédé et appareil d'atténuation de la discontinuité de phase relative - Google Patents

Procédé et appareil d'atténuation de la discontinuité de phase relative Download PDF

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Publication number
WO2015023297A1
WO2015023297A1 PCT/US2013/055375 US2013055375W WO2015023297A1 WO 2015023297 A1 WO2015023297 A1 WO 2015023297A1 US 2013055375 W US2013055375 W US 2013055375W WO 2015023297 A1 WO2015023297 A1 WO 2015023297A1
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WO
WIPO (PCT)
Prior art keywords
user equipment
transmitting
relative
determining
profile
Prior art date
Application number
PCT/US2013/055375
Other languages
English (en)
Inventor
Jun Tan
Rapeepat Ratasuk
Weidong Yang
Original Assignee
Nokia Siemens 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.)
Filing date
Publication date
Application filed by Nokia Siemens Networks Oy filed Critical Nokia Siemens Networks Oy
Priority to PCT/US2013/055375 priority Critical patent/WO2015023297A1/fr
Publication of WO2015023297A1 publication Critical patent/WO2015023297A1/fr

Links

Classifications

    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04B—TRANSMISSION
    • H04B17/00—Monitoring; Testing
    • H04B17/20—Monitoring; Testing of receivers
    • H04B17/26—Monitoring; Testing of receivers using historical data, averaging values or statistics
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W52/00—Power management, e.g. TPC [Transmission Power Control], power saving or power classes
    • H04W52/02—Power saving arrangements
    • H04W52/0209—Power saving arrangements in terminal devices
    • H04W52/0212—Power saving arrangements in terminal devices managed by the network, e.g. network or access point is master and terminal is slave
    • H04W52/0216—Power saving arrangements in terminal devices managed by the network, e.g. network or access point is master and terminal is slave using a pre-established activity schedule, e.g. traffic indication frame
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W52/00—Power management, e.g. TPC [Transmission Power Control], power saving or power classes
    • H04W52/02—Power saving arrangements
    • H04W52/0209—Power saving arrangements in terminal devices
    • H04W52/0212—Power saving arrangements in terminal devices managed by the network, e.g. network or access point is master and terminal is slave
    • H04W52/0219—Power saving arrangements in terminal devices managed by the network, e.g. network or access point is master and terminal is slave where the power saving management affects multiple terminals
    • 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
    • H04W52/52—TPC using AGC [Automatic Gain Control] circuits or amplifiers
    • 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

  • LTE Long-term Evolution
  • 3GPP 3 rd Generation Partnership Project
  • Embodiments of the present invention provide solutions to mitigate the impact of RPD on transmissions, such as UL SU-MIMO transmissions.
  • a UE's power amplifier may have some built-in hysteresis to prevent frequent switching between power stages from taking place. Consequently, the probing can include some "zigzag" in the different power levels to reveal any hysteresis, which is subsequently used in the PUSCH schedule.
  • a gain stage can be freely changed. In that case, it may be necessary to build two tables like the table illustrated in Fig. 2.
  • One table can correspond to back-to-back TX power changes, and another table can correspond to TX power changes that occur well-separated in time.
  • K s 1.25 , i3 ⁇ 4 RS OFFSET, ⁇ ) has ldB step size in the range [-3,
  • a CRC check can give the eNB the assurance that the UE receives the uplink grant successfully. As such, regular PUSCHs without much margin can also be used. The probe process can take more time. Also when a phase change table for the back-to-back case is being built, it can be important to ensure that two downlink-control-information (DCIs) for uplink grant are received by the UE.
  • DCIs downlink-control-information
  • the right set of ⁇ PMI, MCS level ⁇ can generally be used at the desired power level.
  • the eNB can schedule the UE to minimize RPD impact for UL-MIMO.
  • an eNB will schedule a precoding matrix for UL-MIMO transmission based on SRS measurement.
  • the eNB can predict the probability of UE PA mode- switching with a given power change, when UE is scheduling the UL-MIMO transmission precoding matrix.
  • the mode-switching probability is low (or zero)
  • the scheduling will not be affected by the RPD profile.
  • the eNB may select an alternative precoding matrix or power to minimize the impact to UL-MIMO performance.
  • the eNB may adjust the assigned MCS level for the PUSCH transmission to prevent the subframe from being received in error.
  • the eNB may attempt to assign a transport block size (TBS) but at a lower MCS level using more resource blocks (RBs). This effectively maintains the same throughput by the UE at the cost of higher total transmission power by the UE.
  • TBS transport block size
  • RBs resource blocks
  • the method does not require knowledge of the RPD profile but uses a power difference between SRS and PUSCH transmission to estimate a severity of the RPD and to accordingly compensate for this difference.
  • a step of the fourth method can include the estimation of a PA switching point probability using P T x ;Srs , PTx, P usch, and MrN(P-rx,srs, PTx, P usch)-
  • the mapping function between these parameters can be determined from, e.g., RAN4 RPD models, manufacturer specifications, statistical models, or historical profiles.
  • certain embodiments of the present invention can be directed to UE-based solutions for mitigating RPD impact.
  • a UE-based solution for mitigating RPD impact it can be assumed that the UE knows the PA switching points, as this information can be available as part of the UE's design. The UE can then make adjustments to the transmission signal if the S S and PUSCH power crosses a switching point. If the UE can also determine the magnitude of the RPD in degrees, the UE can also use that information to determine whether an adjustment is needed (e.g., the UE can make adjustment only if the RPD is greater than a threshold).
  • Fig. 3 illustrates a flowchart of a method in accordance with an embodiment of the invention.
  • the method illustrated in Fig. 3 includes, at 300, determining a relative-phase-discontinuity profile of a user equipment.
  • the method also includes, at 310, performing a scheduling scheme based on the relative phase discontinuity of the user equipment.
  • Fig. 4 illustrates a flowchart of a method in accordance with an embodiment of the invention.
  • the method illustrated in Fig. 4 includes, at 400, determining that a user equipment's transmitting will be impacted by relative -phase discontinuity.
  • the method also includes, at 410, adjusting the user equipment's transmitting to reduce the impact to the transmission.
  • Apparatus 10 can also include one or more antennas (not shown) for transmitting and receiving signals and/or data to and from apparatus 10.
  • Apparatus 10 can further include a transceiver 28 that modulates information on to a carrier waveform for transmission by the antenna(s) and demodulates information received via the antenna(s) for further processing by other elements of apparatus 10.
  • transceiver 28 can be capable of transmitting and receiving signals or data directly.
  • Processor 22 can perform functions associated with the operation of apparatus 10 including, without limitation, precoding of antenna gain/phase parameters, encoding and decoding of individual bits forming a communication message, formatting of information, and overall control of the apparatus 10, including processes related to management of communication resources.
  • memory 14 can store software modules that provide functionality when executed by processor 22.
  • the modules can include an operating system 15 that provides operating system functionality for apparatus 10.
  • the memory can also store one or more functional modules 18, such as an application or program, to provide additional functionality for apparatus 10.
  • the components of apparatus 10 can be implemented in hardware, or as any suitable combination of hardware and software.
  • Fig. 6 illustrates an apparatus in accordance with another embodiment.
  • Apparatus 600 can be a base station and/or an evolved Node B (eNB), for example.
  • Apparatus 600 can include a determining unit 601 that determines a relative -phase-discontinuity profile of a user equipment.
  • Apparatus 600 can also include a performing unit 602 that performs a scheduling scheme based on the relative phase discontinuity of the user equipment.
  • Fig. 7 illustrates an apparatus in accordance with another embodiment.
  • Apparatus 700 can be a user equipment, for example.
  • Apparatus 700 can include a determining unit 701 that determines that a user equipment's transmitting will be impacted by relative -phase discontinuity.
  • Apparatus 700 can also include an adjusting unit 702 that adjusts the user equipment's transmitting to reduce the impact to the transmission.

Landscapes

  • Engineering & Computer Science (AREA)
  • Computer Networks & Wireless Communication (AREA)
  • Signal Processing (AREA)
  • Physics & Mathematics (AREA)
  • Probability & Statistics with Applications (AREA)
  • Electromagnetism (AREA)
  • Mobile Radio Communication Systems (AREA)

Abstract

Des procédés et des appareils peut être configuré pour déterminer un profil de discontinuité de phase relative d'un équipement d'utilisateur. Un procédé peut également comprendre la mise en place d'un schéma de planification basé sur la discontinuité de phase relative de l'équipement d'utilisateur.
PCT/US2013/055375 2013-08-16 2013-08-16 Procédé et appareil d'atténuation de la discontinuité de phase relative WO2015023297A1 (fr)

Priority Applications (1)

Application Number Priority Date Filing Date Title
PCT/US2013/055375 WO2015023297A1 (fr) 2013-08-16 2013-08-16 Procédé et appareil d'atténuation de la discontinuité de phase relative

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
PCT/US2013/055375 WO2015023297A1 (fr) 2013-08-16 2013-08-16 Procédé et appareil d'atténuation de la discontinuité de phase relative

Publications (1)

Publication Number Publication Date
WO2015023297A1 true WO2015023297A1 (fr) 2015-02-19

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Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/US2013/055375 WO2015023297A1 (fr) 2013-08-16 2013-08-16 Procédé et appareil d'atténuation de la discontinuité de phase relative

Country Status (1)

Country Link
WO (1) WO2015023297A1 (fr)

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20080002854A1 (en) * 2003-10-08 2008-01-03 Verance Corporation Signal continuity assessment using embedded watermarks
US7599327B2 (en) * 2004-06-24 2009-10-06 Motorola, Inc. Method and apparatus for accessing a wireless communication system
US20130089044A1 (en) * 2011-10-11 2013-04-11 Telefonaktiebolaget L M Ericsson (Publ) Transmit power adjustment to reduce a relative phase discontinuity

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20080002854A1 (en) * 2003-10-08 2008-01-03 Verance Corporation Signal continuity assessment using embedded watermarks
US7599327B2 (en) * 2004-06-24 2009-10-06 Motorola, Inc. Method and apparatus for accessing a wireless communication system
US20130089044A1 (en) * 2011-10-11 2013-04-11 Telefonaktiebolaget L M Ericsson (Publ) Transmit power adjustment to reduce a relative phase discontinuity

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