US20150085716A1 - Apparatus and method for controlling uplink power control in communication system - Google Patents

Apparatus and method for controlling uplink power control in communication system Download PDF

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Publication number
US20150085716A1
US20150085716A1 US14/395,804 US201314395804A US2015085716A1 US 20150085716 A1 US20150085716 A1 US 20150085716A1 US 201314395804 A US201314395804 A US 201314395804A US 2015085716 A1 US2015085716 A1 US 2015085716A1
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pusch
pucch
dyn
frame
uplink
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Shichang Zhang
Changjun Sun
Yingyang Li
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Samsung Electronics Co Ltd
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Samsung Electronics Co Ltd
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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
    • H04W52/06—TPC algorithms
    • H04W52/14—Separate analysis of uplink or downlink
    • H04W52/146—Uplink power control
    • 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
    • H04W52/18—TPC being performed according to specific parameters
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L5/00—Arrangements affording multiple use of the transmission path
    • H04L5/14—Two-way operation using the same type of signal, i.e. duplex
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L5/00—Arrangements affording multiple use of the transmission path
    • H04L5/14—Two-way operation using the same type of signal, i.e. duplex
    • H04L5/1469—Two-way operation using the same type of signal, i.e. duplex using time-sharing
    • 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
    • H04W52/10—Open loop power control
    • 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
    • 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
    • H04W52/16—Deriving transmission power values from another channel
    • 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
    • H04W52/18—TPC being performed according to specific parameters
    • H04W52/22—TPC being performed according to specific parameters taking into account previous information or commands
    • H04W52/223—TPC being performed according to specific parameters taking into account previous information or commands predicting future states of the transmission
    • 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
    • H04W52/18—TPC being performed according to specific parameters
    • H04W52/24—TPC being performed according to specific parameters using SIR [Signal to Interference Ratio] or other wireless path parameters
    • H04W52/247—TPC being performed according to specific parameters using SIR [Signal to Interference Ratio] or other wireless path parameters where the output power of a terminal is based on a path parameter sent by another terminal
    • 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
    • H04W52/32—TPC of broadcast or control channels
    • H04W52/325—Power control of control or pilot channels
    • H04W72/0413—
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W72/00—Local resource management
    • H04W72/04—Wireless resource allocation
    • H04W72/044—Wireless resource allocation based on the type of the allocated resource
    • H04W72/0446—Resources in time domain, e.g. slots or frames
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W72/00—Local resource management
    • H04W72/20—Control channels or signalling for resource management
    • H04W72/21—Control channels or signalling for resource management in the uplink direction of a wireless link, i.e. towards the network
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W76/00—Connection management
    • H04W76/20—Manipulation of established connections
    • H04W76/27—Transitions between radio resource control [RRC] states
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W52/00—Power management, e.g. TPC [Transmission Power Control], power saving or power classes
    • H04W52/04—TPC
    • H04W52/38—TPC being performed in particular situations
    • H04W52/50—TPC being performed in particular situations at the moment of starting communication in a multiple access environment

Definitions

  • the present invention relates to an apparatus and method for controlling uplink power in a communications system, and particularly to an apparatus and method for controlling uplink power in a dynamic Time Division Duplexing (TDD) cell in a communications system.
  • TDD Time Division Duplexing
  • each radio frame has a length of 10 ms and includes two half-frames. Each half-frame has a length of 5 ms.
  • FIG. 1 schematically illustrates a frame structure in a conventional LTE TDD communication system.
  • Each half-frame includes 8 time slots each of which has a length of 0.5 ms and 3 special fields, i.e. a Downlink Pilot Time Slot (DwPTS) field, a Guarding Period (GP) field, and a Uplink Pilot Time Slot (UpPTS) field.
  • the 3 special fields have a total length of 1 ms.
  • each sub-frame in the frame structure in the LTE TDD communication system shown in FIG. 1 includes two successive time slots, i.e. the k'th sub-frame contains time slot 2k and time slot 2k+1.
  • the LTE TDD communication system supports 7 types of uplink-downlink configurations as shown in Table 1, where D represents downlink sub-frame, U represents uplink sub-frame, S represents special sub-frames in the 3 special fields.
  • TDD uplink-downlink configurations of a cell are semi-static, i.e. an enhanced NodeB (eNB) will not frequently change TDD uplink-downlink configurations of the cell, and the TDD uplink-downlink configurations in a cell will not change during at least one data transmission.
  • eNB enhanced NodeB
  • transmitting power of an uplink sub-frame is controlled by an eNB.
  • An eNB transmits static and semi-static uplink power control parameters to a UE via a broadcast message and a Radio Resource Control (RRC) layer message.
  • the UE determines the transmitting power of a Physical Uplink Shared Channel (PUSCH) and/or a Physical Uplink Control Channel (PUCCH) in each uplink sub-frame based on the uplink power control parameters and a power control command received previously from a Physical Downlink Control Channel (PDCCH).
  • PUSCH Physical Uplink Shared Channel
  • PUCCH Physical Uplink Control Channel
  • the power of the PUSCH in sub-frame i of the current cell c can be determined by using a Math Figure (1).
  • power control open-loop basic working point of the PUSCH is referred to as power control open-loop basic working point of the PUSCH.
  • the power of the PUCCH in sub-frame i of the current cell c can be determined by a Math Figure (2).
  • P O — PUCCH P O — NOMINAL — PUCCH +P O — UE — PUCCH
  • LTE-A LTE-Advanced
  • a dynamic TDD scheme is adopted to keep the ratio of current uplink sub-frames to current downlink sub-frames more consistent with the proportion of current uplink traffic load to current downlink traffic load, which is good for increasing uplink-downlink peak transmission rate of users and increasing system throughput.
  • FIG. 2 schematically illustrates a conflict uplink sub-frame structure and a non-conflict uplink sub-frame structure in a conventional LTE-A communication system.
  • TDD UL/DL (uplink-downlink) configurations are changing dynamically with the UL/DL traffic load in the current cell. Therefore, at a moment, TDD UL/DL configurations of the current cell may be different from those of adjacent cells, and an adjacent cell may transmit a downlink sub-frame at a position where the current dynamic TDD cell transmits an uplink sub-frame, as in the case for the sub-frames 3 and 8 of the dynamic TDD cell as shown in FIG. 2 , and such sub-frames are referred to as conflict sub-frames. Transmission in a conflict uplink sub-frame make an eNB receive fewer interference from other UEs but receive much larger interference from downlink signals of adjacent eNBs.
  • uplink IoT Interference over Thermal
  • SINR Signal to Interference and Noise Ratio
  • Embodiments of the present invention provide an apparatus and method for controlling uplink power in a communications system.
  • Embodiments of the present invention provide an apparatus and method for controlling uplink power in a dynamic TDD cell in a communications system.
  • Embodiments of the present invention provide an apparatus and method for controlling transmitting power of PUSCH/PUCCH in a conflict uplink sub-frame in a communications system.
  • Embodiments of the present invention provides an apparatus and method for uplink power control in a dynamic TDD cell which can implement rational control over transmitting power of PUSCH/PUCCH in a conflict uplink sub-frame.
  • the present invention adopts the following technical solutions.
  • a method for uplink power control in a dynamic Time Division Duplexing (TDD) cell may include:
  • a User Equipment accessing a dynamic TDD cell, a difference ⁇ PUSCH / ⁇ PUCCH between a power control open-loop basic working point of Physical Uplink Shared CHannel (PUSCH)/Physical Uplink Control CHannel (PUCCH) in a conflict uplink sub-frame and a power control open-loop basic working point of PUSCH/PUCCH in a non-conflict uplink sub-frame from an enhanced NodeB (eNB); wherein the power control open-loop basic working point of PUSCH/PUCCH in a conflict uplink sub-frame is obtained by performing calculations using uplink Interference over Thermal (IoT), thermal noise power and uplink target Signal to Interference and Noise Ratio (SINR) of the conflict uplink sub-frame; and
  • IoT uplink Interference over Thermal
  • SINR Signal to Interference and Noise Ratio
  • the difference ⁇ PUSCH / ⁇ PUCCH is received by the UE via a Radio Resource Control (RRC) layer message, a system broadcasting message or a physical layer message.
  • RRC Radio Resource Control
  • the RRC layer message, the system broadcasting message or the physical layer message is a customized message or a conventional message.
  • a method for uplink power control in a dynamic Time Division Duplexing (TDD) cell may include:
  • the difference P O — Nominal — PUSCH — Dyn /P O — Nominal — PUCCH — Dyn is received by the UE via a Radio Resource Control (RRC) layer message, a system broadcasting message or a physical layer message;
  • RRC Radio Resource Control
  • the P O — UE — PUSCH — Dyn /P O — UE — PUCCH — Dyn is received by the UE via an RRC layer message or a physical layer message.
  • the RRC layer message, the system broadcasting message or the physical layer message is a customized message or a conventional message.
  • a method for uplink power control in a dynamic Time Division Duplexing (TDD) cell may include:
  • IoT uplink Interference over Thermal
  • SINR Signal to Interference and Noise Ratio
  • the P O — Nominal — PUSCH — Dyn /P O — Nominal — PUCCH — Dyn is received by the UE via a Radio Resource Control (RRC) layer message, a system broadcasting message or a physical layer message.
  • RRC Radio Resource Control
  • the RRC layer message, the system broadcasting message or the physical layer message is a customized message or a conventional message.
  • a method for uplink power control in a dynamic Time Division Duplexing (TDD) cell may include:
  • a UE-specific open-loop basic working point parameter P O — UE — PUSCH — Dyn /P O — UE — PUCCH — Dyn of Physical Uplink Shared CHannel (PUSCH)/Physical Uplink Control CHannel (PUCCH) in a conflict uplink sub-frame which is obtained by performing calculations using a power control open-loop basic working point of PUSCH/PUCCH in the conflict uplink sub-frame and a cell-specific open-loop basic working point parameter P O — NOMINAL — PUSCH,c (j)/P O — NOMINAL — PUCCH,c (j) of PUSCH/PUCCH in a non-conflict uplink sub-frame; wherein the power control open-loop basic working point of PUSCH/PUCCH in the conflict uplink sub-frame is obtained by performing calculations using uplink Interference
  • the P O — UE — PUSCH — Dyn /P O — UE — PUCCH — Dyn obtained by performing calculations using the power control open-loop basic working point of PUSCH/PUCCH of the conflict uplink sub-frame and the P O — NOMINAL — PUSCH,c (j)/P O — NOMINAL — PUCCH is obtained by:
  • P O — UE — PUSCH — Dyn /P O — UE — PUCCH — Dyn the power control open-loop basic working point of PUSCH/PUCCH in the conflict sub-frame ⁇ P O — NOMINAL — PUSCH,c /P O — NOMINAL — PUCCH .
  • the P O — UE — PUSCH — Dyn /P O — UE — PUCCH — Dyn is received by the UE via a Radio Resource Control (RRC) layer message or a physical layer message.
  • RRC Radio Resource Control
  • the RRC layer message, the system broadcasting message or the physical layer message is a customized message or a conventional message.
  • a User Equipment (UE) in a dynamic Time Division Duplexing (TDD) cell may include:
  • a receiver for receiving, if a UE accesses a dynamic TDD cell, a difference ⁇ PUSCH / ⁇ PUCCH between a power control open-loop basic working point of Physical Uplink Shared Channel (PUSCH)/Physical Uplink Control Channel (PUCCH) in a conflict uplink sub-frame and a power control open-loop basic working point of PUSCH/PUCCH in a non-conflict uplink sub-frame from an evolved NodeB (eNB); wherein the power control open-loop basic working point of PUSCH/PUCCH in a conflict uplink sub-frame is obtained by performing calculations using uplink Interference over Thermal (IoT), thermal noise power and uplink target Signal to Interference and Noise Ratio (SINR) of the conflict uplink sub-frame; and
  • IoT uplink Interference over Thermal
  • SINR Signal to Interference and Noise Ratio
  • a controller for adding the difference ⁇ PUSCH / ⁇ PUCCH to a power control open-loop basic working point of PUSCH/PUCCH in calculating an uplink transmitting power of PUSCH/PUCCH in the conflict uplink sub-frame.
  • the difference ⁇ PUSCH / ⁇ PUCCH is received by the UE via a Radio Resource Control (RRC) layer message, a system broadcasting message or a physical layer message.
  • RRC Radio Resource Control
  • the RRC layer message, the system broadcasting message or the physical layer message is a customized message or a conventional message.
  • a User Equipment (UE) in a dynamic Time Division Duplexing (TDD) cell may include:
  • a receiver for receiving, from an evolved NodeB (eNB), if a UE accesses a dynamic TDD cell, a cell-specific open-loop basic working point parameter P O — Nominal — PUSCH — Dyn /P O — Nominal — PUCCH — Dyn of Physical Uplink Shared Channel (PUSCH)/Physical Uplink Control Channel (PUCCH) in a conflict uplink sub-frame and a UE-specific open-loop basic working point parameter P O — UE — PUSCH — Dyn /P O — UE — PUCCH — Dyn of PUSCH/PUCCH in the conflict uplink sub-frame which are obtained by using a power control open-loop basic working point of PUSCH/PUCCH in the conflict uplink sub-frame; wherein the power control open-loop basic working point of PUSCH/PUCCH in the conflict uplink sub-frame is obtained by performing calculations using uplink Interference over Thermal (IoT), thermal
  • the difference P O — Nominal — PUSCH — Dyn /P O — Nominal — PUCCH — Dyn is received by the UE via a Radio Resource Control (RRC) layer message, a system broadcasting message or a physical layer message;
  • RRC Radio Resource Control
  • the P O — UE — PUSCH — Dyn /P O — UE — PUCCH — Dyn is received by the UE via a RRC layer message or a physical layer message.
  • the RRC layer message, the system broadcasting message or the physical layer message is a customized message or a conventional message.
  • a User Equipment (UE) in a dynamic Time Division Duplexing (TDD) cell may include:
  • a receiver for receiving, from an evolved NodeB (eNB), if a UE accesses a dynamic TDD cell, a cell-specific open-loop basic working point parameter P O — Nominal — PUSCH — Dyn /P O — Nominal — PUCCH — Dyn of Physical Uplink Shared Channel (PUSCH)/Physical Uplink Control Channel (PUCCH) in a conflict uplink sub-frame which is obtained by using a power control open-loop basic working point of PUSCH/PUCCH in the conflict uplink sub-frame; wherein the power control open-loop basic working point of PUSCH/PUCCH in the conflict uplink sub-frame is obtained by performing calculations using uplink Interference over Thermal (IoT), thermal noise power and uplink target Signal to Interference and Noise Ration (SINR) of the conflict uplink sub-frame; and
  • IoT uplink Interference over Thermal
  • SINR uplink target Signal to Interference and Noise Ration
  • the P O — Nominal — PUSCH — Dyn /P O — Nominal — PUCCH — Dyn is received by the UE via a Radio Resource Control (RRC) layer message, a system broadcasting message or a physical layer message.
  • RRC Radio Resource Control
  • the RRC layer message, the system broadcasting message or the physical layer message is a customized message or a conventional message.
  • a User Equipment (UE) in a dynamic Time Division Duplexing (TDD) cell may include:
  • a receiver for receiving, from an evolved NodeB (eNB), if a UE accesses a dynamic TDD cell, a UE-specific open-loop basic working point parameter P O — UE — PUSCH — Dyn /P O — UE — PUCCH — Dyn of Physical Uplink Shared Channel (PUSCH)/Physical Uplink Control Channel (PUCCH) in a conflict uplink sub-frame which is obtained by performing calculations using a power control open-loop basic working point of PUSCH/PUCCH in the conflict uplink sub-frame and a cell-specific open-loop basic working point parameter P O — NOMINAL — PUSCH,c (j)/P O — NOMINAL — PUCCH,c (j) of PUSCH/PUCCH in a non-conflict uplink sub-frame; wherein the power control open-loop basic working point of PUSCH/PUCCH in the conflict uplink sub-frame is obtained by performing calculations using uplink Interference
  • the P O — UE — PUSCH — Dyn /P O — UE — PUCCH — Dyn obtained by performing calculations using the power control open-loop basic working point of PUSCH/PUCCH of the conflict uplink sub-frame and the P O — NOMINAL — PUSCH,c (j)/P O — NOMINAL — PUCCH is obtained by:
  • P O — UE — PUSCH — Dyn /P O — UE — PUCCH — Dyn the power control open-loop basic working point of PUSCH/PUCCH in the conflict sub-frame ⁇ P O — NOMINAL — PUSCH,c ( j )/ P O — NOMINAL — PUCCH .
  • the P O — UE — PUSCH — Dyn /P O — UE — PUCCH — Dyn is received by the UE via a Radio Resource Control (RRC) layer message or a physical layer message.
  • RRC Radio Resource Control
  • the RRC layer message, the system broadcasting message or the physical layer message is a customized message or a conventional message.
  • a UE receives from an eNB an uplink power control parameter which has been adjusted for a conflict uplink sub-frame after accessing a dynamic TDD cell.
  • the parameter may include a difference between a power control open-loop basic working point of a conflict uplink sub-frame and a power control open-loop basic working point of a non-conflict uplink sub-frame, or a cell-specific open-loop basic working point parameter of a conflict uplink sub-frame and/or a UE-specific open-loop basic working point parameter of a conflict uplink sub-frame.
  • the UE calculates uplink transmitting power of PUSCH/PUCCH in a conflict uplink sub-frame by using the adjusted uplink power control parameter. Therefore, since the power control parameter received by the UE has been adjusted for a conflict uplink sub-frame, rational control over uplink transmission power of PUSCH/PUCCH and accurate compensation for the interference and noise effects received on a conflict uplink sub-frame can be implemented.
  • FIG. 1 schematically illustrates a frame structure in a conventional LTE TDD communication system.
  • FIG. 2 schematically illustrates a conflict uplink sub-frame structure and a non-conflict uplink sub-frame structure in a conventional LTE-A communication system.
  • FIG. 3 schematically illustrates a process for controlling uplink power in LTE/LTE-A communication systems in accordance with embodiment one of the present invention.
  • FIG. 4 schematically illustrates a conflict uplink sub-frame structure and a non-conflict uplink sub-frame structure in LTE/LTE-A communication system in accordance with embodiment one of the present invention.
  • FIG. 5 schematically illustrates a process for controlling uplink power in LTE/LTE-A communication systems in accordance with embodiment two of the present invention.
  • FIG. 6 schematically illustrates a process for controlling uplink power in LTE/LTE-A communication systems in accordance with embodiment three of the present invention.
  • FIG. 7 schematically illustrates a process for controlling uplink power in LTE/LTE-A communication systems in accordance with embodiment four of the present invention.
  • FIG. 8 schematically illustrates an internal structure of an eNB in LTE/LTE-A communication systems according to an embodiment of the present invention.
  • FIG. 9 schematically illustrates an internal structure of a UE in LTE/LTE-A communication systems according to an embodiment of the present invention.
  • Embodiments of the present invention provide an apparatus and method for controlling uplink power in a communications system.
  • Embodiments of the present invention provide an apparatus and method for controlling uplink power in a dynamic Time Division Duplexing (TDD) cell in a communications system.
  • TDD Time Division Duplexing
  • Embodiments of the present invention provide an apparatus and method for controlling transmitting power of Physical Uplink Shared Channel (PUSCH)/Physical Uplink Control Channel (PUCCH) in a conflict uplink sub-frame in a communications system.
  • PUSCH Physical Uplink Shared Channel
  • PUCCH Physical Uplink Control Channel
  • transmitting power of uplink signals in a non-conflict uplink sub-frame can be determined according to conventional methods for Long-Term Evolution (LTE)/-Term Evolution-Advanced (LTE-A).
  • LTE Long-Term Evolution
  • LTE-A Long-Term Evolution-Advanced
  • eNB enhanced NodeB
  • the main embodiment of the present invention includes: an eNB adjusts an uplink signal power control parameter to be received by a User Equipment (UE) according to interference and noise suffered by a conflict uplink sub-frame, and the UE calculates transmitting power using the adjusted parameter to counteract the interference and noise suffered by the conflict uplink sub-frame to increase a Signal to Interference and Noise Ratio (SINR) of received PUSCH/PUCCH in the conflict uplink sub-frame.
  • SINR Signal to Interference and Noise Ratio
  • the following embodiments provides four methods for adjusting a power control parameter for uplink signals and corresponding four methods for uplink signal power control, and the methods are described in detail hereinafter.
  • FIG. 3 schematically illustrates a process for controlling uplink power in LTE/LTE-A communication systems in accordance with embodiment one of the present invention. As shown in FIG. 3 , the method may include the following procedures.
  • an eNB calculates a power control open-loop basic working point of PUSCH/PUCCH in a conflict uplink sub-frame in advance by using a uplink Interference over Thermal (IoT), thermal noise power and uplink target SINR, and calculates a difference ⁇ PUSCH / ⁇ PUCCH between the power control open-loop basic working point of PUSCH/PUCCH in the conflict uplink sub-frame and a power control open-loop basic working point of PUSCH/PUCCH in a non-conflict uplink sub-frame, and stores a result of the calculations in an eNB of a dynamic TDD cell.
  • IoT uplink Interference over Thermal
  • a power control open-loop basic working point of an uplink signal is pre-calculated and stored in an eNB.
  • the uplink signal may be PUSCH and/or PUCCH.
  • the open-loop basic working point obtained is for a non-conflict uplink sub-frame, i.e. TDD UpLink-DownLink (UL/DL) configurations of adjacent cells are identical with TDD UL/DL configurations of the current cell.
  • UL/DL TDD UpLink-DownLink
  • a power control open-loop basic working point is also calculated for a conflict uplink sub-frame.
  • the power control open-loop basic working point of a conflict uplink sub-frame is calculated by using uplink IoT, thermal noise power and uplink target SINR of the conflict uplink sub-frame.
  • the open-loop basic working point of PUSCH in a conflict uplink sub-frame is used for PUSCH power control, and the open-loop basic working point of PUCCH in a conflict uplink sub-frame is used for PUCCH power control.
  • the open-loop basic working point is calculated according to interference and noise suffered by the conflict uplink sub-frame.
  • the uplink IoT and the thermal noise power are measured for the conflict uplink sub-frame, and the uplink target SINR is set for the conflict uplink sub-frame. Therefore, the open-loop basic working point obtained is adapted to the interference and noise suffered by the conflict uplink sub-frame.
  • the open-loop basic working point obtained for a non-conflict uplink subframe (which is obtained in a conventional manner) is subtracted from the open-loop basic working point obtained for the conflict uplink sub-frame to obtain the difference ⁇ PUSCH / ⁇ PUCCH between the open-loop basic working points, and the difference is stored in the eNB for power control of the conflict uplink sub-frame.
  • the eNB when a UE accesses a dynamic TDD cell, the eNB sends the difference ⁇ PUSCH / ⁇ PUCCH stored to the UE.
  • the manner of sending the difference of open-loop basic working points may be configured according to the needs, e.g. via a Radio Resource Control (RRC) layer message, a system broadcasting message or a physical layer message to the UE.
  • RRC Radio Resource Control
  • the RRC layer message, the system broadcasting message or the physical layer message used for delivering the difference may be a conventional message, e.g. by using reserved bits of a conventional message to deliver the difference, and this is not limited by the present invention.
  • Sending manner of the open-loop basic working point of a non-conflict uplink subframe may follow a conventional manner, and is not described further herein.
  • the UE receives the difference of open-loop basic working points, and uses the difference in calculating transmitting power of a signal in the conflict uplink sub-frame.
  • the UE After reception of the difference, when calculating transmitting power of a signal (PUSCH or PUCCH) in the conflict uplink sub-frame, the UE adds the difference ⁇ PUSCH / ⁇ PUCCH to a power control open-loop basic working point of PUSCH/PUCCH of a conflict uplink sub-frame which is obtained according to conventional calculations, and takes the result of the adding as the open-loop basic working point of the conflict uplink sub-frame which is then used for calculating the transmitting power of the signal.
  • PUSCH or PUCCH transmitting power of a signal
  • Transmitting power of a signal in a non-conflict uplink sub-frame may be calculated according to a conventional method.
  • the power of PUSCH in sub-frame i of the dynamic TDD cell c can be determined by using a Math Figure (3).
  • the power of PUCCH in sub-frame i of the current dynamic TDD cell c can be determined by a following Math Figure (4):
  • the process of the method for uplink power control of this embodiment is completed.
  • the difference of open-loop basic working points sent by the eNB is used for the UE to adjust the open-loop basic working point of a conflict uplink sub-frame. Therefore, rational power control and comprehensive compensation for special interference and noise affecting the conflict uplink sub-frame are implemented.
  • FIG. 4 schematically illustrates a conflict uplink sub-frame structure and a non-conflict uplink sub-frame structure in LTE/LTE-A communication system in accordance with embodiment one of the present invention.
  • FIG. 5 schematically illustrates a process for controlling uplink power in LTE/LTE-A communication systems in accordance with embodiment two of the present invention.
  • the method may include the following procedures.
  • a power control open-loop basic working point of PUSCH/PUCCH in a conflict uplink sub-frame is calculated by using uplink IoT, thermal noise power and uplink target SINR of the conflict uplink sub-frame.
  • an eNB calculates a cell-specific open-loop basic working point parameter
  • the cell-specific open-loop basic working point parameter and the UE-specific open-loop basic working point parameter are calculated in a manner similar to a conventional manner but taking the open-loop basic working point of the conflict uplink sub-frame stored in block 501 as the open-loop basic working point. Therefore, the sum of the cell-specific open-loop basic working point parameter and the UE-specific open-loop basic working point parameter equals the open-loop basic working point of the conflict uplink sub-frame stored in block 501 .
  • the eNB sends the cell-specific open-loop basic working point parameter
  • the cell-specific open-loop basic working point parameter may be arbitrarily configured according to the needs.
  • the cell-specific open-loop basic working point parameter may be arbitrarily configured according to the needs.
  • the cell-specific open-loop basic working point parameter may be arbitrarily configured according to the needs.
  • the message for delivering the cell-specific open-loop basic working point parameter or the UE-specific open-loop basic working point parameter may be a conventional message or a customized message, and is not limited in the present invention.
  • the UE receives the cell-specific open-loop basic working point parameter
  • the UE uses the sum of the
  • the open-loop basic working point of the conflict uplink sub-frame in calculating the transmitting power of a signal in the conflict uplink sub-frame.
  • the sum of the two parameters equals the open-loop basic working point obtained in block 501 , i.e. is consistent with the open-loop basic working point of noise and interference in the conflict uplink sub-frame. Therefore, using the open-loop basic working point in calculating signal transmitting power enables adaptation to noise and interference in the conflict uplink sub-frame and rational control over signal transmitting power.
  • Transmitting power of a signal in a non-conflict uplink sub-frame may be calculated according to a conventional method.
  • the power of PUSCH in sub-frame i of a dynamic TDD cell c can be determined by using a Math Figure (5).
  • a unified expression can be obtained for open-loop basic working points of PUSCH, cell-specific open-loop basic working point of PUSCH and UE-specific open-loop basic working point of PUSCH in both conflict and non-conflict uplink sub-frames.
  • the power of PUCCH in sub-frame i of the current dynamic TDD cell c can be determined by a Math Figure (6).
  • P PUCCH ⁇ ( i ) min ⁇ ⁇ P CMAX , c ⁇ ( i ) , P O ⁇ _ ⁇ PUCCH + PL c + h ⁇ ( n CQI , n HARQ , n SR ) + ⁇ F ⁇ _ ⁇ PUCCH ⁇ ( F ) + ⁇ T ⁇ D ⁇ ( F ′ ) + g ⁇ ( i ) ⁇ ⁇ [ dBm ] ⁇ ⁇ ⁇
  • ⁇ P O ⁇ _ ⁇ PUCCH ⁇ ( i ) P O ⁇ _ ⁇ N ⁇ OMINAL ⁇ _ ⁇ PUCCH ⁇ ( i ) + P O ⁇ _ ⁇ U ⁇ E ⁇ _ ⁇ PUCCH ⁇ ( i ) .
  • a unified expression can be obtained for open-loop basic working points of PUSCH, cell-specific open-loop basic working point of PUSCH and UE-specific open-loop basic working point of PUSCH in both conflict and non-conflict uplink sub-frames.
  • the process of the method for uplink power control of this embodiment is completed.
  • the UE-specific open-loop basic working point parameter for a conflict uplink sub-frame sent by the eNB enables the UE to adjust the open-loop basic working point of the conflict uplink sub-frame, which implements more rational power control and better compensation for special interference and noise suffered by the conflict uplink sub-frame.
  • the UE uses the parameters for calculating open-loop basic working point when calculating the power of PUSCH and/or PUCCH in sub-frames 3 and 8, and
  • the UE uses the parameters for calculating open-loop basic working point when calculating the power of PUSCH and/or PUCCH in sub-frames 3, 4, 7, 8 and 9, and
  • the cell-specific open-loop basic working point parameter and the UE-specific open-loop basic working point parameter of the conflict uplink subframe need to be sent to UE via extra signaling.
  • the UE-specific open-loop basic working point parameter is mainly related with UE capabilities, so the changes in open-loop basic working point of the conflict uplink sub-frame have little impact on UE-specific open-loop basic working point parameter. Therefore, another embodiment is provided to reduce extra data transmission and downlink resource occupation.
  • cell-specific open-loop basic working point parameter is adjusted merely based on the open-loop basic working point of the conflict uplink subframe and is sent to the UE.
  • FIG. 6 schematically illustrates a process for controlling uplink power in LTE/LTE-A communication systems in accordance with embodiment three of the present invention.
  • the method may include the following procedures.
  • a power control open-loop basic working point of PUSCH/PUCCH in a conflict uplink sub-frame is calculated by using uplink IoT, thermal noise power and uplink target SINR of the conflict uplink sub-frame.
  • the eNB calculates a cell-specific open-loop basic working point parameter
  • the UE-specific open-loop basic working point parameter of PUSCH/PUCCH in the conflict uplink sub-frame is the same with that of a non-conflict uplink sub-frame.
  • the eNB sends the cell-specific open-loop basic working point parameter
  • the parameter may be delivered via an RRC layer message, a system broadcast message or a physical layer message, and so on.
  • the message for delivering the cell-specific open-loop basic working point parameter may be a conventional message or a customized message, and is not limited in the present invention.
  • the UE receives the cell-specific open-loop basic working point parameter
  • the UE uses the sum of the
  • Transmitting power of a signal in a non-conflict uplink sub-frame may be calculated according to a conventional method.
  • the power of PUSCH in sub-frame i of the dynamic TDD cell c can be determined by using a Math Figure (7).
  • a unified expression can be obtained for open-loop basic working point and cell-specific open-loop basic working point of PUSCH in both conflict and non-conflict uplink sub-frames.
  • the power of PUCCH in sub-frame i of the current dynamic TDD cell c can be determined by a Math Figure (8).
  • P PUCCH ⁇ ( i ) min ⁇ ⁇ P CMAX , c ⁇ ( i ) , P O ⁇ _ ⁇ PUCCH + PL c + h ⁇ ( n CQI , n HARQ , n SR ) + ⁇ F ⁇ _ ⁇ PUCCH ⁇ ( F ) + ⁇ T ⁇ D ⁇ ( F ′ ) + g ⁇ ( i ) ⁇ ⁇ [ dBm ] ⁇ ⁇ ⁇
  • ⁇ P O ⁇ _ ⁇ PUCCH ⁇ ( i ) P O ⁇ _ ⁇ N ⁇ OMINAL ⁇ _ ⁇ PUCCH ⁇ ( i ) + P O ⁇ _ ⁇ U ⁇ E ⁇ _ ⁇ PUCCH ⁇ ( i ) .
  • a unified expression can be obtained for open-loop basic working point and cell-specific open-loop basic working point of PUCCH in both conflict and non-conflict uplink sub-frames.
  • the process of the method for uplink power control of this embodiment is completed.
  • the UE-specific open-loop basic working point parameter for a conflict uplink sub-frame sent by the eNB enables the UE to adjust the open-loop basic working point of the conflict uplink sub-frame, which implements more rational power control and better compensation for special interference and noise suffered by the conflict uplink sub-frame.
  • the cell-specific open-loop basic working point parameter of the conflict uplink sub-frame may be sent using a system broadcasting message.
  • system broadcasting messages are well-defined, which makes it difficult to use conventional system broadcasting messages or use newly defined system broadcasting messages.
  • an embodiment four is provided to reflect the changes in cell-specific open-loop basic working point parameter of the conflict uplink sub-frame by using changes in UE-specific open-loop basic working point parameter.
  • FIG. 7 schematically illustrates a process for controlling uplink power in LTE/LTE-A communication systems in accordance with embodiment four of the present invention.
  • the method may include the following procedures.
  • a power control open-loop basic working point of PUSCH/PUCCH in a conflict uplink sub-frame is calculated by using uplink IoT, thermal noise power and uplink target SINR of the conflict uplink sub-frame, and is stored in an eNB.
  • an eNB calculates a UE-specific open-loop basic working point parameter
  • the cell-specific open-loop basic working point parameter of PUSCH/PUCCH in the conflict uplink sub-frame is the same with that of a non-conflict uplink sub-frame.
  • the power control open-loop basic working point, the cell-specific open-loop basic working point parameter and the UE-specific open-loop basic working point parameter have fixed inherent relationship with each other, and the open-loop basic working point of a conflict uplink sub-frame is determined in block 701 . Therefore, the changes which were to be made to the cell-specific open-loop basic working point parameter of the conflict uplink sub-frame are made to the UE-specific open-loop basic working point parameter based on the fixed inherent relationship between the power control open-loop basic working point, the cell-specific open-loop basic working point parameter and the UE-specific open-loop basic working point parameter.
  • the UE-specific open-loop basic working point parameter of the conflict uplink sub-frame may be set to be the difference between the open-loop basic working point obtained in block 701 and the cell-specific basic working point of a non-conflict uplink sub-frame.
  • the eNB sends the UE-specific open-loop basic working point parameter
  • the parameter may be delivered via an RRC layer message or a physical layer message or the like.
  • the message for delivering the cell-specific open-loop basic working point parameter may be a conventional message or a customized message, and is not limited in the present invention.
  • the UE receives the cell-specific open-loop basic working point parameter
  • the UE uses the
  • Transmitting power of a signal in a non-conflict uplink sub-frame may be calculated according to a conventional method.
  • the power of PUSCH in sub-frame i of the dynamic TDD cell c can be determined by using a Math Figure (9).
  • a unified expression can be obtained for open-loop basic working point and UE-specific open-loop basic working point of PUSCH in both conflict and non-conflict uplink sub-frames.
  • the power of PUCCH in sub-frame i of the current dynamic TDD cell c can be determined by a Math Figure (10):
  • P PUCCH ⁇ ( i ) min ⁇ ⁇ P CMAX , c ⁇ ( i ) , P O ⁇ _ ⁇ PUCCH + PL c + h ⁇ ( n CQI , n HARQ , n SR ) + ⁇ F ⁇ _ ⁇ PUCCH ⁇ ( F ) + ⁇ T ⁇ D ⁇ ( F ′ ) + g ⁇ ( i ) ⁇ ⁇ [ dBm ] ⁇ ⁇ ⁇
  • ⁇ P O ⁇ _ ⁇ PUCCH ⁇ ( i ) P O ⁇ _ ⁇ N ⁇ OMINAL ⁇ _ ⁇ PUCCH ⁇ ( i ) + P O ⁇ _ ⁇ U ⁇ E ⁇ _ ⁇ PUCCH ⁇ ( i ) .
  • a unified expression can be obtained for open-loop basic working point and UE-specific open-loop basic working point of PUCCH in both conflict and non-conflict uplink sub-frames.
  • the process of the method for uplink power control of this embodiment is completed.
  • the UE-specific open-loop basic working point parameter for a conflict uplink sub-frame sent by the eNB enables the UE to adjust the open-loop basic working point of the conflict uplink sub-frame, which implements more rational power control and better compensation for special interference and noise suffered by the conflict uplink sub-frame.
  • FIG. 8 schematically illustrates an internal structure of an eNB in LTE/LTE-A communication systems according to an embodiment of the present invention.
  • an eNB 800 includes a receiver 811 , a controller 813 , a transmitter 815 , and a storage unit 817 .
  • the controller 813 controls the overall operation of the eNB 800 , specially controls the eNB 800 to perform an operation of controlling uplink power, i.e., an operation related to control uplink power in a dynamic TDD cell according to an embodiment of the present invention.
  • the operation of controlling uplink power is performed in the manner described before with reference to FIGS. 3 to 7 , so the detailed description will be omitted herein.
  • the receiver 811 receives signals from a UE under a control of the controller 813 .
  • the signals received in the receiver 811 are described before with reference to FIGS. 3 to 7 , so the detailed description will be omitted herein.
  • the transmitter 815 transmits signals to the UE under a control of the controller 813 .
  • the signals transmitted in the transmitter 815 are described before with reference to FIGS. 3 to 7 , so the detailed description will be omitted herein.
  • the storage unit 817 stores the signals received by the receiver 811 and data for an operation of the eNB 800 , e.g., information related to the operation of controlling the uplink power, i.e., the operation related to control the uplink power in the dynamic TDD cell. While the receiver 811 , the controller 813 , the transmitter 815 , and the storage unit 817 are shown in FIG. 8 as separate units, it is to be understood that this is for merely convenience of description. In other words, the receiver 811 , the controller 813 , the transmitter 815 , and the storage unit 817 may be incorporated into a single unit.
  • FIG. 9 schematically illustrates an internal structure of a UE in LTE/LTE-A communication systems according to an embodiment of the present invention.
  • a UE 900 includes a receiver 911 , a controller 913 , a transmitter 915 , and a storage unit 917 .
  • the controller 913 controls the overall operation of the UE 900 , specially controls the UE 900 to perform an operation of controlling uplink power, i.e., an operation related to control uplink power in a dynamic TDD cell according to an embodiment of the present invention.
  • the operation of controlling uplink power is performed in the manner described before with reference to FIGS. 3 to 7 , so the detailed description will be omitted herein.
  • the receiver 911 receives signals from an eNB under a control of the controller 913 .
  • the signals received in the receiver 911 are described before with reference to FIGS. 3 to 7 , so the detailed description will be omitted herein.
  • the transmitter 915 transmits signals to the eNB under a control of the controller 913 .
  • the signals transmitted in the transmitter 915 are described before with reference to FIGS. 3 to 7 , so the detailed description will be omitted herein.
  • the storage unit 917 stores the signals received by the receiver 911 and data for an operation of the UE 900 , e.g., information related to the operation of controlling the uplink power, i.e., the operation related to control the uplink power in the dynamic TDD cell.
  • receiver 911 While the receiver 911 , the controller 913 , the transmitter 915 , and the storage unit 917 are shown in FIG. 9 as separate units, it is to be understood that this is for merely convenience of description. In other words, the receiver 911 , the controller 913 , the transmitter 915 , and the storage unit 917 may be incorporated into a single unit.

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KR102029036B1 (ko) 2019-10-08
EP2839701A1 (fr) 2015-02-25
EP2839701A4 (fr) 2015-11-04
US20170215149A1 (en) 2017-07-27
CN103379604A (zh) 2013-10-30
EP2839701B1 (fr) 2019-10-02
CN103379604B (zh) 2018-04-27
KR20130118774A (ko) 2013-10-30
WO2013157815A1 (fr) 2013-10-24
US10912037B2 (en) 2021-02-02

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