WO2016099101A1 - 상향링크 전송 파워 제어 방법 및 장치 - Google Patents
상향링크 전송 파워 제어 방법 및 장치 Download PDFInfo
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- WO2016099101A1 WO2016099101A1 PCT/KR2015/013685 KR2015013685W WO2016099101A1 WO 2016099101 A1 WO2016099101 A1 WO 2016099101A1 KR 2015013685 W KR2015013685 W KR 2015013685W WO 2016099101 A1 WO2016099101 A1 WO 2016099101A1
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- tpc
- transmission power
- uplink transmission
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- tpcs
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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
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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
- H04W52/34—TPC management, i.e. sharing limited amount of power among users or channels or data types, e.g. cell loading
- H04W52/343—TPC management, i.e. sharing limited amount of power among users or channels or data types, e.g. cell loading taking into account loading or congestion level
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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
- H04W52/54—Signalisation aspects of the TPC commands, e.g. frame structure
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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
- H04W52/54—Signalisation aspects of the TPC commands, e.g. frame structure
- H04W52/58—Format of the TPC bits
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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
- H04W52/34—TPC management, i.e. sharing limited amount of power among users or channels or data types, e.g. cell loading
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- 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
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W72/00—Local resource management
- H04W72/20—Control channels or signalling for resource management
- H04W72/23—Control channels or signalling for resource management in the downlink direction of a wireless link, i.e. towards a terminal
Definitions
- the present invention relates to wireless communication, and more particularly, to a method for controlling uplink transmission power in a wireless communication system and an apparatus using the same.
- Typical examples include 3D beam forming, massive multiple input multiple output (MIMO), heterogeneous networks, or small cells.
- MIMO massive multiple input multiple output
- Small cells are one of the techniques for increasing traffic capacity and data rate. Small cells are generally deployed as hotspots within macro cell coverage.
- the backhaul between the small cell and the macro cell may be ideal or non-ideal. Techniques such as intra-site carrier aggregation (CA) or coordinated multi-point (CoMP) assume ideal backhaul. Dual connectivity, also known as inter-site CA, assumes a non-ideal backhaul.
- CA carrier aggregation
- CoMP coordinated multi-point
- a method of controlling uplink transmission power in a state where a plurality of cells is configured is provided.
- the present invention provides a method for controlling uplink transmission power for a plurality of serving cells and an apparatus using the same.
- a method for controlling uplink transmission power in a wireless communication system may include receiving, by a wireless device, TPC monitoring information for receiving a plurality of transmit power commands (TPCs) for adjusting uplink transmission power for a plurality of serving cells, wherein the wireless device is based on the TPC monitoring information.
- TPCs transmit power commands
- the TPC monitoring information may include a TPC identifier masked by a cyclic redundancy check (CRC) of the downlink control channel and information on a plurality of TPC indexes indicating the plurality of TPCs in the TPC payload.
- CRC cyclic redundancy check
- the TPC monitoring information may include information about the size of the TPC payload.
- an apparatus for controlling uplink transmission power in a wireless communication system includes a transceiver for transmitting and receiving a radio signal and a processor coupled with the transceiver.
- the processor receives TPC monitoring information for receiving a plurality of transmit power commands (TPCs) for adjusting uplink transmission power for a plurality of serving cells through the transceiver and controls downlink based on the TPC monitoring information.
- the channel is monitored to receive a TPC payload through the transceiver, obtain a plurality of TPCs within the TPC payload, and apply the plurality of TPCs to uplink transmission power for each of the plurality of serving cells.
- uplink transmission power for each uplink channel may be adjusted.
- 1 shows UL power control in the existing 3GPP LTE.
- FIG 3 shows various examples of a scenario in which a plurality of cells are configured.
- FIG. 4 is a flow illustrating UL transmission power control according to an embodiment of the present invention.
- FIG. 5 shows UL transmission power control according to another embodiment of the present invention.
- FIG. 6 is a block diagram illustrating a wireless communication system in which an embodiment of the present invention is implemented.
- the wireless device may be fixed or mobile, and the user equipment (UE) may be a mobile station (MS), a mobile terminal (MT), a user terminal (UT), a subscriber station (SS), or a personal digital assistant (PDA). ), A wireless modem, a handheld device, or other terms.
- the wireless device may be a device that supports only data communication, such as a machine-type communication (MTC) device.
- MTC machine-type communication
- a base station generally refers to a fixed station that communicates with a wireless device, and may be referred to by other terms such as an evolved-NodeB (eNB), a base transceiver system (BTS), and an access point. Can be.
- eNB evolved-NodeB
- BTS base transceiver system
- the present invention is applied based on 3GPP long term evolution (LTE) based on 3rd Generation Partnership Project (3GPP) Technical Specification (TS).
- LTE long term evolution
- 3GPP 3rd Generation Partnership Project
- TS Technical Specification
- one subframe has a length of 1 ms, which is called a transmission time interval (TTI).
- TTI transmission time interval
- a radio frame includes 10 subframes, and one subframe may include two consecutive slots.
- the subframe may include a plurality of orthogonal frequency division multiplexing (OFDM) symbols.
- OFDM symbol is only for representing one symbol period in the time domain, since 3GPP LTE uses orthogonal frequency division multiple access (OFDMA) in downlink (DL), multiple access scheme or name There is no limit on.
- the OFDM symbol may be called another name such as a single carrier-frequency division multiple access (SC-FDMA) symbol, a symbol period, and the like.
- SC-FDMA single carrier-frequency division multiple access
- one subframe includes 14 OFDM symbols in a normal cyclic prefix (CP), and one subframe includes 12 OFDM symbols in an extended CP.
- a physical channel of 3GPP LTE may be divided into a downlink (DL) physical channel and an uplink (UL) physical channel.
- the DL physical channel includes a physical downlink control channel (PDCCH), a physical control format indicator channel (PCFICH), a physical hybrid-ARQ indicator channel (PHICH), and a physical downlink shared channel (PDSCH).
- the UL physical channel includes a physical uplink control channel (PUCCH) and a physical uplink shared channel (PUSCH).
- the PCFICH transmitted in the first OFDM symbol of a subframe carries a control format indicator (CFI) regarding the number of OFDM symbols (that is, the size of the control region) used for transmission of control channels in the subframe.
- CFI control format indicator
- the wireless device first receives the CFI on the PCFICH and then monitors the PDCCH.
- the PHICH carries a positive-acknowledgement (ACK) / negative-acknowledgement (NACK) signal for an uplink hybrid automatic repeat request (HARQ).
- ACK positive-acknowledgement
- NACK negative-acknowledgement
- HARQ uplink hybrid automatic repeat request
- the ACK / NACK signal for uplink (UL) data on the PUSCH transmitted by the wireless device is transmitted on the PHICH.
- DCI downlink control information
- PDSCH also called DL grant
- PUSCH resource allocation also called UL grant
- VoIP Voice over Internet Protocol
- Blind decoding is used for the detection of the PDCCH.
- Blind decoding is a method of demasking a desired identifier in a cyclic redundancy check (CRC) of a received PDCCH (referred to as a candidate PDCCH) and checking a CRC error to determine whether the corresponding PDCCH is its control channel.
- the base station determines the PDCCH format according to the DCI to be sent to the wireless device and attaches the CRC to the corresponding DCI. Then, a unique identifier (referred to as RNTI (Radio Network Temporary Identifier)) is masked on the CRC according to the owner or the purpose of the PDCCH.
- RNTI Radio Network Temporary Identifier
- PUCCH carries uplink control information (UCI) and supports multiple formats.
- a PUCCH having a different number of bits per subframe may be used according to a modulation scheme dependent on the PUCCH format.
- PUCCH format 1 is used for transmission of SR (Scheduling Request)
- PUCCH format 1a / 1b is used for transmission of ACK / NACK signal for HARQ
- PUCCH format 2 is used for transmission of CQI
- PUCCH format 2a / 2b is used for CQI and Used for simultaneous transmission of ACK / NACK signals.
- 1 shows UL power control in the existing 3GPP LTE.
- the base station transmits information about the transmit power command (TPC) 10 to the wireless device.
- the TPC 10 is received on the PDCCH as information sent by the base station to adjust the UL transmission power.
- the TPC 10 may be included in the DCI and transmitted along with scheduling information for DL transmission or UL transmission.
- the TPC 10 may be included in a DCI transmitting UL transmission power (called DCI format 3 / 3A) and transmitted. If the TPC is 1 bit, it is DCI format 3A. If the TPC is 2 bits, it is DCI format 3.
- the wireless device determines the UL transmission power based on the TPC 10 and transmits the UL channel 20 based on this.
- a transmission power P PUSCH (i) for PUSCH transmission in subframe i is defined as follows.
- P CMAX is the maximum transmit power set in subframe i
- M PUSCH (i) is the bandwidth of PUSCH resource allocation in subframe i
- P O_PUSCH (j) is a parameter given in a higher layer
- ⁇ (j) is a parameter given to the upper layer
- PL c is the DL pathloss estimate calculated by the wireless device
- ⁇ TF (i) is a device specific parameter
- f (i) is a specific value obtained from the TPC.
- the transmission power P PUCCH (i) for PUCCH transmission in subframe i is defined as follows.
- P CMAX is the maximum transmit power set in subframe i
- PL c is the DL path loss estimation calculated by the wireless device
- P O_PUCCH is a parameter given by the base station
- h (n CQI , n HARQ , n SR ) is a value dependent on the PUCCH format.
- ⁇ F_PUCCH (F) is a parameter given by a higher layer
- ⁇ TxD (F) is a value set when a PUCCH is transmitted through multiple antennas
- g (i) is a specific value obtained from the TPC.
- TPC (n) is the nth TPC value, and n is called a TPC index.
- N TPC values become a payload and a CRC is added. The CRC is masked with a TPC-RNTI to identify that it is a DCI format 3 / 3A with a TPC.
- the wireless device de-masks the TPC-RNTI every subframe to monitor the PDCCH.
- the wireless device applies a TPC corresponding to a pre-assigned TPC index to the UL transmission power.
- the wireless device may be served by a plurality of serving cells.
- Each serving cell may be defined as a downlink (DL) component carrier (CC) or a pair of DL CC and UL (uplink) CC.
- DL downlink
- CC downlink component carrier
- uplink uplink
- the serving cell may be divided into a primary cell and a secondary cell.
- the primary cell is a cell that operates at the primary frequency, performs an initial connection establishment process, initiates a connection reestablishment process, or is designated as a primary cell in a handover process.
- the primary cell is also called a reference cell.
- the secondary cell operates at the secondary frequency, may be established after a Radio Resource Control (RRC) connection is established, and may be used to provide additional radio resources.
- RRC Radio Resource Control
- At least one primary cell is always configured, and the secondary cell may be added / modified / released by higher layer signaling (eg, radio resource control (RRC) message).
- the cell index (CI) of the primary cell may be fixed. For example, the lowest CI may be designated as the CI of the primary cell.
- the CI of the primary cell is 0, and the CI of the secondary cell is sequentially assigned from 1.
- FIG 3 shows various examples of a scenario in which a plurality of cells are configured.
- the first base station 110 is a macro base station having a wide coverage
- the second and third base stations 120 and 130 are small base stations having a relatively narrow coverage.
- the cell operated by the macro base station 110 is called a macro cell
- the cell operated by the small base stations 120 and 130 is called a small cell.
- Each base station 110, 120, 130 may operate one or more cells.
- Scenario 1 is a case where the macro base station 110 and the small base station (120, 130) communicates with the wireless device 140 using the same frequency band.
- Scenario 2 is a case where the macro base station 110 and the small base station (120, 130) communicates with the wireless device 140 using different frequency bands.
- Scenario 2 is a case where the small base station 120 is out of coverage of the base station 110 in a macro and communicates with the wireless device 140 using the same or different frequency bands.
- a master cell group (MCG) and a secondary cell group (SCG) may be configured for a wireless device in which a plurality of cells are configured.
- MCG is a group of serving cells having a primary cell (PCell) and zero or more secondary cells (SCell).
- the MCG may be served by the macro base station 110 and the SCG may be served by one or more small base stations 120 and 130.
- the SCG is a group of secondary cells having a primary secondary cell (PSCell) and zero or more secondary cells.
- the MCG cell is a cell belonging to the MCG
- the SCG cell is a cell belonging to the SCG.
- the PSCell is a secondary cell in which the wireless device performs random access, and is a cell in which an uplink control channel (eg, PUCCH) can be transmitted.
- PUCCH uplink control channel
- PUCCH offloading may be supported in a CA situation even though dual connectivity is not supported.
- the plurality of serving cells configured for the wireless device may be divided into a plurality of cell groups, and at least one cell for each cell group may be configured to transmit a PUCCH.
- a cell group including a PCell is called a first cell group
- a cell group including at least one secondary cell is called a second cell group.
- a cell capable of transmitting PUCCH in a first cell group is called a first PUCCH cell
- a cell capable of transmitting PUCCH in a second cell group is called a second PUCCH cell.
- the first PUCCH cell and the second PUCCH cell may independently transmit a UL channel.
- the first PUCCH cell may be a PCell.
- the second PUCCH cell may be a PSCell or an SCell.
- the first PUCCH cell may be referred to as a PCell
- the second PUCCH cell may be referred to as a PPCell.
- the PCell may send a message specifying a PPCell among cells in the second cell group.
- the existing UL transmission power only considers that the PUCCH is transmitted in one cell. Therefore, it is proposed how to control the UL transmission power for the two PUCCH when the two PUCCH is transmitted in the PCell and PPCell.
- each of the PCell and the PPCell is given a DCI format 3 / 3A as shown in FIG. 2 and may be used to control the PUCCH transmission power for the corresponding cell.
- a first DCI format 3 is received at a PCell and a second DCI format 3 is received at a PPCell.
- the first DCI format 3 may be monitored based on the first TPC-RNTI
- the second DCI format 3 may be monitored based on the second TPC-RNTI.
- the wireless device may apply the TPC of the first DCI format 3 to the transmission power of the first PUCCH transmitted from the PCell, and may apply the TPC of the second DCI format 3 to the transmission power of the second PUCCH transmitted from the PPCell.
- This has the advantage of utilizing the structure of the existing DCI format 3 / 3A as it is.
- the wireless device performs blind decoding on the two DCI formats separately, the burden of additional monitoring may increase.
- FIG. 4 is a flow illustrating UL transmission power control according to an embodiment of the present invention.
- the wireless device receives the TPC monitoring information (S410).
- the TPC monitoring information is information used for the wireless device to monitor a DL control channel having a TPC for a plurality of cells.
- the TPC monitoring information may be received through an RRC message, a medium access control (MAC) message, or a DCI.
- MAC medium access control
- the following table shows an example of elements included in the TPC monitoring information.
- the names are examples only and not all elements are essential.
- Table 1 Name Explanation MTPC-RNTI Identifier masked in CRC of DCI including TPC for multiple cells 1st TPC-index Index of TPC applied to PUCCH transmission of the first PUCCH cell 2nd TPC-index Index of TPC applied to PUCCH transmission of the second PUCCH cell TPC payload size Information about the payload size of the DCI and / or the total number of TPCs in the DCI
- the wireless device monitors the PDCCH based on the TPC monitoring information and receives the TPC (S420).
- the PDCCH may be monitored in the common search space of the corresponding subframe of the PCell.
- the TPC monitoring information may include information regarding the type or location of a search space for which the PDCCH is to be monitored.
- the TPC monitoring information may include information about a cell on which the PDCCH is to be monitored.
- the wireless device checks the CRC of the PDCCH using the MTPC-RNTI in the common search space. If a CRC error is not detected, a TPC payload is obtained from the corresponding PDCCH.
- the wireless device may acquire a first TPC corresponding to the first TPC-index and a second TPC corresponding to the second TPC-index in the TPC payload.
- the first TPC and the second TPC may have the same number of bits (1 bit or 2 bits). Alternatively, the first TPC and the second TPC may have different bit numbers.
- the wireless device applies the first TPC to the transmit power for the first PUCCH, and applies the second TPC to the transmit power for the second PUCCH (S430).
- the transmission power for each PUCCH may be given by Equation 2.
- the first PUCCH may be transmitted in the PCell, and the second PUCCH may be transmitted in the PPCell.
- the first PUCCH and the second PUCCH may be transmitted in the same subframe or different subframes.
- the base station transmits TPC information to be applied to the PUCCH transmitted in a plurality of PUCCH cells to each radio device on the PDCCH.
- the payload size of the TPC information may be defined according to the payload size of the existing DCI format 3 / 3A to reduce the number of PDCCH blind detections.
- TPC-RNTI may be given for each PUCCH cell.
- the base station may independently set the TPC-RNTI and TPC-index for each PUCCH cell.
- the wireless device may receive TPCs for different cells on different PDCCHs.
- the TPC-Index may apply a common value to two or more PUCCH cells, and the TPC-RNTI may be given for each PUCCH.
- the same TPC-RNTI and the same TPC-index may be applied to all PUCCH cells.
- FIG. 5 shows UL transmission power control according to another embodiment of the present invention. This shows UL power control using DL scheduling DCI.
- the DCI 510 received at the PCell includes information about DL scheduling and TPC for the PDSCH 520.
- the wireless device transmits HARQ ACK / NACK for the PDSCH 520 on the PUCCH 530 in the PPCell.
- DCI 510 may include a TPC for PUCCH 530.
- the TPC in the DCI 510 scheduling the PDSCH 520 is applied to the PUCCH 530 for the ACK / NACK feedback.
- the DCI 510 is not limited to the PCell and is transmitted, but may be transmitted in the SCell in which the PDSCH or PDCCH is transmitted.
- Equation 2 the initial power setting for setting the PUCCH transmission power will be described.
- P O_PUCCH is an offset value given by the base station
- g (i) is a value continuously adjusted by the TPC. More specifically, P 0_PUCCH includes a P O_UE_PUCCH value to reflect the value of P 0_NOMINAL_PUCCH and environment of each wireless device to reflect the cell common environment.
- P 0_PUCCH to be applied to the transmit power of the PUCCH for each PUCCH cell may be configured as follows.
- P 0_NOMINAL_PUCCH configured in PCell is used the same for other PUCCH cells, and P 0_UE_PUCCH is configured through RRC signaling for each PUCCH cell.
- the coverage, frequency, and location environment of the PPCell and the PCell are similar, it may be useful when the PCC and the PPCell differentiate the PUCCH transmission performance of the wireless device.
- P 0_UE_PUCCH value set in the PCell is used the same for other PUCCH cells, and P 0_NOMINAL_PUCCH is configured through RRC signaling for each PUCCH cell.
- the coverage, frequency, and location environment of the PPCell and the PCell are different, the PUCCH transmission performance of the corresponding wireless device may be useful when the PCell and the PPCell operate similarly.
- G (t) to be applied to the transmit power of the PUCCH for each PUCCH cell may be initialized as follows. If a random access procedure is not performed in the corresponding PUCCH cell, g (0) may be set as follows.
- FIG. 6 is a block diagram illustrating a wireless communication system in which an embodiment of the present invention is implemented.
- the wireless device 50 includes a processor 51, a memory 52, and a transceiver 53.
- the memory 52 is connected to the processor 51 and stores various instructions executed by the processor 51.
- the transceiver 53 is connected to the processor 51 to transmit and / or receive a radio signal.
- the processor 51 implements the proposed functions, processes and / or methods.
- the UL uplink control operation of the wireless device may be implemented by the processor 51.
- the instructions may be stored in the memory 52 and executed by the processor 51 to perform the above-described operations.
- Base station 60 includes a processor 61, a memory 62, and a transceiver 63.
- Base station 60 may operate in an unlicensed band.
- the memory 62 is connected to the processor 61 and stores various instructions executed by the processor 61.
- the transceiver 63 is connected to the processor 61 to transmit and / or receive a radio signal.
- the processor 61 implements the proposed functions, processes and / or methods. In the above-described embodiment, the operation of the base station may be implemented by the processor 61.
- the processor may include application-specific integrated circuits (ASICs), other chipsets, logic circuits, and / or data processing devices.
- the memory may include read-only memory (ROM), random access memory (RAM), flash memory, memory card, storage medium and / or other storage device.
- the RF unit may include a baseband circuit for processing a radio signal.
- the above-described technique may be implemented as a module (process, function, etc.) for performing the above-described function.
- the module may be stored in memory and executed by a processor.
- the memory may be internal or external to the processor and may be coupled to the processor by various well known means.
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Abstract
Description
명 칭 | 설 명 |
MTPC-RNTI | 복수의 셀에 대한 TPC가 포함되는 DCI의 CRC에 마스킹되는 식별자 |
제1 TPC-index | 제1 PUCCH 셀의 PUCCH 전송에 적용되는 TPC의 인덱스 |
제2 TPC-index | 제2 PUCCH 셀의 PUCCH 전송에 적용되는 TPC의 인덱스 |
TPC 페이로드 크기 | 해당 DCI의 페이로드 크기 및/또는 해당 DCI 내 전체 TPC 갯수에 관한 정보 |
Claims (15)
- 무선 통신 시스템에서 상향링크 전송 파워 제어 방법에 있어서,무선기기가 복수의 서빙셀에 대한 상향링크 전송 파워를 조정하기 위한 복수의 TPC(transmit power command)를 수신하기 위한 TPC 모니터링 정보를 수신하는 단계;무선기기가 상기 TPC 모니터링 정보를 기반으로 하향링크 제어 채널을 모니터링하여, TPC 페이로드를 수신하는 단계;상기 TPC 페이로드 내에서 복수의 TPC를 획득하는 단계;상기 복수의 TPC를 상기 복수의 서빙셀 각각에 대한 상향링크 전송 파워에 적용하는 단계를 포함하는 것을 특징으로 하는 상향링크 전송 파워 제어 방법.
- 제1 항에 있어서,상기 TPC 모니터링 정보는 상기 하향링크 제어 채널의 CRC(Cyclic Redundancy Check)에 마스킹되는 TPC 식별자와 상기 TPC 페이로드 내 상기 복수의 TPC를 가리키는 복수의 TPC 인덱스에 관한 정보를 포함하는 것을 특징으로 하는 상향링크 전송 파워 제어 방법.
- 제2 항에 있어서,상기 TPC 모니터링 정보는 상기 TPC 페이로드의 크기에 관한 정보를 포함하는 것을 특징으로 하는 상향링크 전송 파워 제어 방법.
- 제1 항에 있어서,상기 하향링크 제어 채널은 상기 복수의 서빙셀 중 하나에서 모니터링되는 것을 특징으로 하는 상향링크 전송 파워 제어 방법.
- 제4 항에 있어서,상기 하향링크 제어 채널은 상기 복수의 서빙셀 중 하나의 공용 검색 공간에서 모니터링되는 것을 특징으로 하는 상향링크 전송 파워 제어 방법.
- 제5 항에 있어서,상기 복수의 서빙셀 중 하나는 1차셀인 것을 특징으로 하는 상향링크 전송 파워 제어 방법.
- 제1 항에 있어서,상기 복수의 서빙셀 각각에 대한 상향링크 전송 파워는 해당 서빙셀의 PUCCH(physical uplink control channel)에 대한 상향링크 전송 파워인 것을 특징으로 하는 상향링크 전송 파워 제어 방법.
- 제7 항에 있어서,상기 복수의 TPC는 제1 TPC와 제2 TPC를 포함하고,상기 제1 TPC는 제1 서빙셀의 PUCCH를 위한 상향링크 전송 파워에 적용되고,상기 제2 TPC는 제2 서빙셀의 PUCCH를 위한 상향링크 전송 파워에 적용되는 것을 특징으로 하는 상향링크 전송 파워 제어 방법.
- 제8 항에 있어서,상기 제1 TPC와 상기 제2 TPC는 동일한 비트 수를 갖는 것을 특징으로 하는 상향링크 전송 파워 제어 방법.
- 제1 항에 있어서,상기 TPC 모니터링 정보는 RRC(radio resource control) 메시지를 통해 수신되는 것을 특징으로 하는 상향링크 전송 파워 제어 방법.
- 무선 통신 시스템에서 상향링크 전송 파워를 제어하는 장치에 있어서,무선신호를 송신 및 수신하는 송수신기; 와상기 송수신기와 연결되는 프로세서를 포함하되, 상기 프로세서는,복수의 서빙셀에 대한 상향링크 전송 파워를 조정하기 위한 복수의 TPC(transmit power command)를 수신하기 위한 TPC 모니터링 정보를 상기 송수신기를 통해 수신하고;상기 TPC 모니터링 정보를 기반으로 하향링크 제어 채널을 모니터링하여, TPC 페이로드를 상기 송수신기를 통해 수신하고;상기 TPC 페이로드 내에서 복수의 TPC를 획득하고;상기 복수의 TPC를 상기 복수의 서빙셀 각각에 대한 상향링크 전송 파워에 적용하는 것을 특징으로 하는 장치.
- 제11 항에 있어서,상기 TPC 모니터링 정보는 상기 하향링크 제어 채널의 CRC(Cyclic Redundancy Check)에 마스킹되는 TPC 식별자와 상기 TPC 페이로드 내 상기 복수의 TPC를 가리키는 복수의 TPC 인덱스에 관한 정보를 포함하는 것을 특징으로 하는 장치.
- 제12 항에 있어서,상기 TPC 모니터링 정보는 상기 TPC 페이로드의 크기에 관한 정보를 포함하는 것을 특징으로 하는 장치.
- 제11 항에 있어서,상기 하향링크 제어 채널은 상기 복수의 서빙셀 중 하나에서 모니터링되는 것을 특징으로 하는 장치.
- 제11 항에 있어서,상기 하향링크 제어 채널은 상기 복수의 서빙셀 중 하나의 공용 검색 공간에서 모니터링되는 것을 특징으로 하는 장치.
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US16/196,449 US10292110B2 (en) | 2014-12-15 | 2018-11-20 | Uplink transmission power control method and apparatus |
US16/376,372 US10440658B2 (en) | 2014-12-15 | 2019-04-05 | Uplink transmission power control method and apparatus |
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JP6437655B2 (ja) | 2018-12-12 |
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US10764834B2 (en) | 2020-09-01 |
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US20170374624A1 (en) | 2017-12-28 |
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US20190090202A1 (en) | 2019-03-21 |
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