WO2011122910A2 - 무선 접속 시스템에서 상향링크 전력 제어 방법 및 장치 - Google Patents
무선 접속 시스템에서 상향링크 전력 제어 방법 및 장치 Download PDFInfo
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- WO2011122910A2 WO2011122910A2 PCT/KR2011/002286 KR2011002286W WO2011122910A2 WO 2011122910 A2 WO2011122910 A2 WO 2011122910A2 KR 2011002286 W KR2011002286 W KR 2011002286W WO 2011122910 A2 WO2011122910 A2 WO 2011122910A2
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W52/00—Power management, e.g. TPC [Transmission Power Control], power saving or power classes
- H04W52/04—TPC
- H04W52/30—TPC using constraints in the total amount of available transmission power
- H04W52/36—TPC using constraints in the total amount of available transmission power with a discrete range or set of values, e.g. step size, ramping or offsets
- H04W52/365—Power headroom reporting
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- 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
- H04L5/0001—Arrangements for dividing the transmission path
- H04L5/0003—Two-dimensional division
- H04L5/0005—Time-frequency
- H04L5/0007—Time-frequency the frequencies being orthogonal, e.g. OFDM(A), DMT
- H04L5/001—Time-frequency the frequencies being orthogonal, e.g. OFDM(A), DMT the frequencies being arranged in component carriers
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- 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
- H04L5/003—Arrangements for allocating sub-channels of the transmission path
- H04L5/0053—Allocation of signaling, i.e. of overhead other than pilot signals
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W24/00—Supervisory, monitoring or testing arrangements
- H04W24/02—Arrangements for optimising operational condition
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W4/00—Services specially adapted for wireless communication networks; Facilities therefor
- H04W4/70—Services for machine-to-machine communication [M2M] or machine type communication [MTC]
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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
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W52/00—Power management, e.g. TPC [Transmission Power Control], power saving or power classes
- H04W52/04—TPC
- H04W52/30—TPC using constraints in the total amount of available transmission power
- H04W52/36—TPC using constraints in the total amount of available transmission power with a discrete range or set of values, e.g. step size, ramping or offsets
- H04W52/367—Power values between minimum and maximum limits, e.g. dynamic range
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- 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
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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
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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
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W72/00—Local resource management
- H04W72/50—Allocation or scheduling criteria for wireless resources
- H04W72/54—Allocation or scheduling criteria for wireless resources based on quality criteria
- H04W72/542—Allocation or scheduling criteria for wireless resources based on quality criteria using measured or perceived quality
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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
- H04W52/32—TPC of broadcast or control channels
- H04W52/325—Power control of control or pilot channels
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W88/00—Devices specially adapted for wireless communication networks, e.g. terminals, base stations or access point devices
- H04W88/02—Terminal devices
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W88/00—Devices specially adapted for wireless communication networks, e.g. terminals, base stations or access point devices
- H04W88/08—Access point devices
Definitions
- the present invention relates to a communication method and apparatus used in a wireless access system.
- the present invention relates to a method for reporting power headroom (PH) of a terminal in a multi-carrier environment and an apparatus supporting the same.
- PH power headroom
- a number of carriers constituting uplink and downlink may be one each, and a wireless communication system in which uplink bandwidth and downlink bandwidth are generally symmetrical to each other may be provided.
- ITU International Telecommunication Union
- carrier aggregation Bandwidth Aggregation
- Spectrum Aggregation for efficient use of fragmented small bands to achieve the same effect as combining multiple bands physically in the frequency domain and using bands of logically large bands.
- Carrier aggregation is introduced to support increased throughput, to prevent cost increases due to the introduction of wideband RF devices, and to ensure compatibility with existing systems.
- Carrier aggregation is a technology for exchanging data between a terminal and a base station through a plurality of bundles of carriers in bandwidth units defined in a conventional wireless access system.
- the carrier of the bandwidth unit defined in the existing wireless communication system may be referred to as a component carrier (CC).
- the carrier aggregation technology may include a technology that supports a system bandwidth of up to 5 MHz by tying up to 5 component carriers even though one component carrier supports a bandwidth of 5 MHz, 10 MHz, or 20 MHz.
- data may be simultaneously transmitted and received through multiple uplink / downlink component carriers.
- the terminal can monitor and measure all component carriers.
- a technique for reporting a power headroom (PH) of the terminal needs to be developed in a manner different from the existing method.
- the present invention to solve this problem, it is an object of the present invention to provide various power headroom (PH) reporting method of the terminal in a carrier-matched multi-carrier environment and devices supporting the same.
- PH power headroom
- the present invention provides a method for reporting a power headroom (PH) of the terminal in a multi-carrier environment and devices supporting the same.
- PH power headroom
- a method for reporting a power headroom of a terminal in a multicarrier system includes: receiving, by a terminal, a physical downlink control channel (PDCCH) signal including uplink resource allocation information from a base station; Transmitting at least one of a physical uplink shared channel (PUSCH) signal and a physical uplink control channel (PUCCH) signal to a base station in a predetermined subframe based on the uplink resource allocation information; The method may further include calculating at least one power headroom value in a predetermined subframe, and transmitting, by the terminal, a report message including at least one power headroom value to the base station.
- PUSCH physical uplink shared channel
- PUCCH physical uplink control channel
- the terminal when the terminal operates in the transmission mode A, the first type power headroom value and the second type power headroom value of the terminal in a predetermined subframe are reported to the base station, and when the terminal operates in the transmission mode B, The first type power headroom value of the terminal in a predetermined subframe may be reported.
- a power headroom reporting method in a multicarrier system includes transmitting a physical downlink control channel (PDCCH) signal including uplink resource allocation information to a terminal and a physical uplink according to a transmission mode of the terminal. Transmitting at least one of a shared channel (PUSCH) signal and a physical uplink control channel (PUCCH) signal in a predetermined subframe based on uplink resource allocation information and a report message including one or more power headroom values from the terminal; (Eg, extended power headroom MAC control element).
- PUSCH shared channel
- PUCCH physical uplink control channel
- At least one power headroom value is calculated according to the transmission mode of the terminal, and when the terminal operates in the transmission mode A, the power headroom value is the first type power headroom value and the second type power in a predetermined subframe. If the terminal is a headroom value and the terminal operates in the transmission mode B, the power headroom value may be only the first type power headroom value.
- a terminal for performing a power headroom report in a multicarrier system includes: a receiving module for receiving a channel signal and a transmitting module for transmitting a channel signal; And a processor supporting a function for performing the power headroom report.
- the terminal receives a physical downlink control channel (PDCCH) signal including uplink resource allocation information from the base station using a receiving module, and according to the transmission mode, the physical uplink shared channel (PUSCH) signal and the physical uplink Transmit at least one of control channel (PUCCH) signals to a base station through a transmitting module in a predetermined subframe based on uplink resource allocation information, calculate one or more power headroom values in the predetermined subframe, and transmit a transmission mode
- a report message including one or more power headroom values may be transmitted to the base station through the transmission module.
- the first type power headroom value and the second type power headroom value of the terminal in a predetermined subframe are reported to the base station, and when the terminal is operating in transmission mode B, The first type power headroom value may be reported.
- a base station supporting a power headroom reporting method in a multicarrier system supports a receiving module for receiving a channel signal, a transmitting module for transmitting a channel signal, and a function for supporting power headroom reporting. It may include a processor.
- the base station transmits a physical downlink control channel (PDCCH) signal including uplink resource allocation information to the terminal using the transmission module, and according to a transmission mode of the terminal, a physical uplink shared channel (PUSCH) signal and a physical uplink Receive at least one of a link control channel (PUCCH) signal through a receiving module in a predetermined subframe based on uplink resource allocation information, and receive a report message including one or more power headroom values from the terminal through the receiving module. It may further comprise the step. At this time, one or more power headroom values are reported according to the transmission mode of the terminal.
- PDCCH physical downlink control channel
- PUSCH physical uplink shared channel
- PUCCH link control channel
- the power headroom value is a first type power headroom value and a second type power headroom value in a predetermined subframe, and the terminal operates in transmission mode B.
- the power headroom value may be a first type power headroom value.
- the terminal transmits the PUSCH signal and the PUCCH signal to the base station in a predetermined subframe of a primary cell, and if the terminal is in transmission mode B, the terminal The PUSCH signal may be transmitted to the base station in a predetermined subframe of the serving cell.
- the PUCCH signal and the PUSCH signal may be transmitted through the PUCCH region and the PUSCH region, respectively.
- transmission mode B the PUCCH signal may be piggybacked on the PUSCH signal and transmitted through the PUSCH region.
- the first type power headroom value may be calculated using the maximum transmission power of the terminal and the transmission power of the PUSCH signal
- the second type power headroom value is the maximum transmission power of the terminal, the transmission power of the PUSCH signal, and the PUCCH. It can be calculated using the transmit power of the signal.
- the first power headroom value is calculated using the difference between the maximum transmit power and the transmit power of the PUCCH signal
- the second power headroom value is the maximum transmit power, the transmit power of the PUSCH signal, and the transmit power of the PUCCH signal. It can be calculated using the difference from the sum.
- the second type power headroom value may be calculated as in Equation 2.
- P CMAX c represents the maximum transmission power of the terminal
- P PUSCH_scheduled (i) may indicate the transmission power of the PUSCH signal
- P PUCCH_scheduled (i) may indicate the transmission power of the PUCCH signal.
- the second type power headroom value may be calculated using the transmit power of the PUCCH signal even when the PUCCH signal is not transmitted in a predetermined subframe.
- the second type power headroom value may be calculated as in Equation 6.
- the first type power headroom value may be calculated using Equation 1.
- the report message may further include a maximum transmit power value in a primary cell or serving cell of the terminal.
- uplink resources can be efficiently allocated to the terminal by using various power headroom (PH) reporting methods of the terminal for each cell.
- PH power headroom
- a power headroom reporting method may be used when a terminal is allocated one or more cells. Therefore, even when the PUCCH and PUSCH signals are simultaneously transmitted, the power headroom reporting method of the terminal can be efficiently used.
- FIG. 1 is a view showing the structure of a radio frame that can be used in embodiments of the present invention.
- FIG. 2 is a diagram illustrating a resource grid for one downlink slot that can be used in embodiments of the present invention.
- FIG. 3 is a diagram illustrating a structure of a downlink subframe that can be used in embodiments of the present invention.
- FIG. 4 is a diagram illustrating an example of an uplink subframe structure that can be used in embodiments of the present invention.
- FIG. 5 is a diagram illustrating an example of multi-carrier combining (carrier aggregation) used in a component carrier (CC) of the LTE system and the LTE_A system.
- CC component carrier
- FIG. 6 is a diagram illustrating a case in which a PUCCH signal is piggybacked in a PUSCH region.
- FIG. 7 is a diagram illustrating a method of transmitting a PUCCH signal and a PUSCH signal of a terminal according to a transmission mode.
- FIG. 8 is a diagram illustrating an example of a method for reporting power headroom of a terminal according to a transmission mode according to an embodiment of the present invention.
- FIG. 9 illustrates an example of an apparatus supporting the power headroom reporting method disclosed in the present invention as an embodiment of the present invention.
- FIG. 10 is a view showing another example of an apparatus supporting the power headroom reporting method disclosed in the present invention as an embodiment of the present invention.
- Embodiments of the present invention disclose various power headroom (PH) reporting methods of a terminal in a multi-carrier environment and devices supporting the same.
- PH power headroom
- each component or feature may be considered to be optional unless otherwise stated.
- Each component or feature may be embodied in a form that is not combined with other components or features.
- some components and / or features may be combined to form an embodiment of the present invention.
- the order of the operations described in the embodiments of the present invention may be changed. Some components or features of one embodiment may be included in another embodiment or may be replaced with corresponding components or features of another embodiment.
- the base station is meant as a terminal node of a network that directly communicates with a mobile station.
- the specific operation described as performed by the base station in this document may be performed by an upper node of the base station in some cases.
- various operations performed for communication with a mobile station in a network consisting of a plurality of network nodes including a base station may be performed by the base station or network nodes other than the base station.
- the 'base station' may be replaced by terms such as a fixed station, a Node B, an eNode B (eNB), an advanced base station (ABS), or an access point.
- a 'mobile station' may be a user equipment (UE), a subscriber station (SS), a mobile subscriber station (MSS), a mobile terminal, an advanced mobile station (AMS) or a terminal. (Terminal), etc. may be substituted.
- UE user equipment
- SS subscriber station
- MSS mobile subscriber station
- AMS advanced mobile station
- Terminal Terminal
- the transmitting end refers to a fixed and / or mobile node that provides a data service or a voice service
- the receiving end refers to a fixed and / or mobile node that receives a data service or a voice service. Therefore, in uplink, a mobile station may be a transmitting end and a base station may be a receiving end. Similarly, in downlink, a mobile station may be a receiving end and a base station may be a transmitting end.
- Embodiments of the present invention may be supported by standard documents disclosed in at least one of the IEEE 802.xx system, the 3rd Generation Partnership Project (3GPP) system, the 3GPP LTE system, and the 3GPP2 system, which are wireless access systems, and in particular, the present invention.
- Embodiments of may be supported by 3GPP TS 36.211, 3GPP TS 36.212, 3GPP TS 36.213 and 3GPP TS 36.321 documents. That is, obvious steps or portions not described among the embodiments of the present invention may be described with reference to the above documents.
- all terms disclosed in the present document can be described by the above standard document.
- CDMA code division multiple access
- FDMA frequency division multiple access
- TDMA time division multiple access
- OFDMA orthogonal frequency division multiple access
- SC-FDMA single carrier frequency division multiple access
- CDMA may be implemented with a radio technology such as Universal Terrestrial Radio Access (UTRA) or CDMA2000.
- TDMA may be implemented with wireless technologies such as Global System for Mobile communications (GSM) / General Packet Radio Service (GPRS) / Enhanced Data Rates for GSM Evolution (EDGE).
- GSM Global System for Mobile communications
- GPRS General Packet Radio Service
- EDGE Enhanced Data Rates for GSM Evolution
- OFDMA may be implemented in a wireless technology such as IEEE 802.11 (Wi-Fi), IEEE 802.16 (WiMAX), IEEE 802-20, Evolved UTRA (E-UTRA).
- UTRA is part of the Universal Mobile Telecommunications System (UMTS).
- 3GPP Long Term Evolution (LTE) is part of an Evolved UMTS (E-UMTS) using E-UTRA, and employs OFDMA in downlink and SC-FDMA in uplink.
- LTE-A (Advanced) system is an evolution of the 3GPP LTE system.
- 3GPP LTE / LTE-A mainly described, but the technical idea of the present invention is not limited thereto.
- FIG. 1 is a view showing the structure of a radio frame that can be used in embodiments of the present invention.
- a radio frame consists of 10 subframes, and one subframe consists of two slots.
- the time taken for one subframe to be transmitted is called a transmission time interval (TTI).
- TTI transmission time interval
- the length of one subframe is 1ms
- the length of one slot is 0.5ms.
- One slot includes a plurality of Orthogonal Frequency Division Multiplexing (OFDM) symbols in the time domain, and includes a plurality of Resource Blocks (RBs) in the frequency domain.
- the OFDM symbol is for representing one symbol period in a 3GPP LTE system using an Orthogonal Frequency Division Multiplexing Access (OFDMA) scheme in downlink. That is, the OFDM symbol may be referred to as an SC-FDMA symbol or a symbol interval according to a multiple access scheme.
- the RB includes a plurality of consecutive subcarriers in one slot in resource allocation units.
- the structure of the radio frame of FIG. 1 is merely an example, and the number of subframes included in the radio frame, the number of slots included in the subframe, and the number of OFDM symbols included in the slot may be variously changed.
- FIG. 2 is a diagram illustrating a resource grid for one downlink slot that can be used in embodiments of the present invention.
- the downlink slot includes a plurality of OFDM symbols in the time domain.
- one downlink slot includes seven OFDM symbols, and one resource block (RB) includes 12 subcarriers in a frequency domain.
- Each element on the resource grid is called a resource element (RE), and one resource block RB includes 12 ⁇ 7 resource elements RE.
- the number N DL of resource blocks included in the downlink slot depends on the downlink transmission bandwidth set in the cell.
- FIG. 3 is a diagram illustrating a structure of a downlink subframe that can be used in embodiments of the present invention.
- the subframe includes two slots in the time domain. Up to three OFDM symbols of the first slot in the subframe are a control region to which control channels are allocated, and the remaining OFDM symbols are a data region to which a Physical Downlink Shared Channel (PDSCH) is allocated.
- PDSCH Physical Downlink Shared Channel
- Downlink control channels used in the 3GPP LTE system include a PCFICH (Physical Control Format Indicator Channel), PDCCH (Physical Downlink Control Channel), PHICH (Physical Hybrid-ARQ Indicator Channel).
- the PCFICH signal transmitted in the first OFDM symbol of the subframe carries information about the number of OFDM symbols (that is, the size of the control region) used for transmission of the control channel signal in the subframe.
- the PHICH carries an ACK (Acknowledgement) / NACK (None-Acknowledgement) signal for an uplink HARQ (Hybrid Automatic Repeat Request). That is, the ACK / NACK signal for the uplink data transmitted by the terminal is transmitted on the PHICH.
- the DCI includes resource allocation information and other control information for a user equipment (UE) or a terminal group. For example, it may include uplink resource allocation information, downlink resource allocation information, and uplink transmission power control command.
- PDCCH includes transmission format and resource allocation information of downlink shared channel (DL-SCH), transmission format and resource allocation information of uplink shared channel (UL-SCH), paging channel (PCH) Paging information on a channel), system information on a DL-SCH, resource allocation information on a higher layer control message such as a random access response transmitted on a PDSCH, a transmit power control command set for individual UEs in a certain UE group, and transmission It can carry information on power control commands, activation of the Voice of Internet Protocol (VoIP), and the like.
- DL-SCH downlink shared channel
- UL-SCH uplink shared channel
- PCH paging channel
- PCH paging channel
- system information on a DL-SCH resource allocation information on a higher layer control message such as a random access response transmitted on a PDSCH
- a transmit power control command set for individual UEs in a certain UE group and transmission It can carry information on power control commands, activation of the Voice of Internet Protocol (VoIP), and the like
- Multiple PDCCHs may be transmitted in one control region.
- the UE can monitor multiple PDCCHs.
- the PDCCH may be transmitted on one or more consecutive control channel elements (CCEs).
- CCE is a logical allocation resource used to provide a PDCCH at one coding rate based on the state of a radio channel.
- the CCE corresponds to a plurality of resource element groups (REGs).
- the format of the PDCCH and the number of available bits of the PDCCH are determined according to the correlation between the coding rate provided in the CCE and the number of CCEs.
- the base station determines the PDCCH format according to the DCI to be transmitted to the UE, and attaches the CRC to the control information.
- the CRC is masked with a unique identifier (RNTI: Radio Network Temporary Identifier) according to the usage or owner of the PDCCH.
- RNTI Radio Network Temporary Identifier
- the unique identifier of the UE eg, C-RNTI: Cell-RNTI
- the paging indicator identifier eg, P-RNTI: Paging-RNTI
- the PDCCH is for system information (especially system information block)
- the system information identifier and system information RNTI S-RNTI
- a random access RNTI RA-RNTI
- the PDCCH may be transmitted through one or more component carriers and may include resource allocation information for one or more component carriers.
- the PDCCH is transmitted on one component carrier, but may include resource allocation information for one or more PDSCHs and PUSCHs.
- FIG. 4 is a diagram illustrating an example of an uplink subframe structure that can be used in embodiments of the present invention.
- the uplink subframe includes a plurality of slots (eg, two).
- the slot may include different numbers of SC-FDMA symbols according to the CP length.
- the uplink subframe is divided into a data region and a control region in the frequency domain.
- the data area includes a physical uplink shared channel (PUSCH) and is used to transmit a data signal including voice information.
- the control region includes a PUCCH (Physical Uplink Control Channel) and is used to transmit uplink control information (UCI).
- the PUCCH includes RB pairs located at both ends of the data region on the frequency axis and hops to a slot boundary. In the LTE system, the UE does not simultaneously transmit the PUCCH signal and the PUSCH signal in order to maintain a single carrier characteristic.
- PUCCH for one UE is allocated as an RB pair in a subframe, and RBs belonging to the RB pair occupy different subcarriers in each of two slots. This is said that the RB pair allocated to the PUCCH is frequency hopping at the slot boundary.
- PUCCH may be used to transmit the following control information.
- SR Service Request: Information used for requesting an uplink UL-SCH resource. It is transmitted using OOK (On-Off Keying) method.
- HARQ ACK / NACK This is a response signal for a downlink data packet on a PDSCH. Indicates whether the downlink data packet was successfully received. One bit of ACK / NACK is transmitted in response to a single downlink codeword, and two bits of ACK / NACK are transmitted in response to two downlink codewords.
- CQI Channel Quality Indicator
- MIMO Multiple Input Multiple Output
- RI rank indicator
- PMI precoding matrix indicator
- the amount of uplink control information (UCI) that a UE can transmit in a subframe depends on the number of SC-FDMA available for control information transmission.
- SC-FDMA available for transmission of control information means the remaining SC-FDMA symbol except for the SC-FDMA symbol for transmitting the reference signal in the subframe, and in the case of the subframe in which the Sounding Reference Signal (SRS) is set, the last of the subframe SC-FDMA symbols are also excluded.
- the reference signal is used for coherent detection of the PUCCH.
- PUCCH supports seven formats according to the transmitted information.
- Table 1 shows a mapping relationship between PUCCH format and UCI in LTE.
- the communication environment considered in the embodiments of the present invention includes a multi-carrier support environment. That is, the multicarrier system or carrier aggregation system used in the present invention refers to one or more carriers having a bandwidth smaller than the target band when configuring a target broadband to support the broadband. Refers to a system using aggregation of carriers.
- the multi-carrier refers to the aggregation (or carrier coupling) of the carrier, wherein carrier aggregation means not only coupling between adjacent carriers, but also coupling between non-adjacent carriers.
- carrier combining may be used interchangeably with terms such as carrier aggregation, bandwidth combining, and the like.
- a multicarrier ie, carrier aggregation
- two or more component carriers CC
- the bandwidth of the combining carrier may be limited to the bandwidth used by the existing system to maintain backward compatibility with the existing IMT system.
- the 3GPP LTE system (LTE R-8 system) supports ⁇ 1.4, 3, 5, 10, 15, 20 ⁇ MHz bandwidth
- the 3GPP LTE_advanced system (ie LTE_A) supports the above bandwidths supported by LTE. It can be used to support bandwidth greater than 20MHz.
- the multicarrier system used in the present invention may support carrier aggregation (ie, carrier aggregation, etc.) by defining a new bandwidth regardless of the bandwidth used in the existing system.
- FIG. 5 is a diagram illustrating an example of multi-carrier combining (carrier aggregation) used in a component carrier (CC) of the LTE system and the LTE_A system.
- CC component carrier
- the component carrier includes a downlink component carrier (DL CC) and an uplink component carrier (UL CC).
- DL CC downlink component carrier
- UL CC uplink component carrier
- One component carrier may have a frequency range of 20 MHz.
- FIG. 5 (b) shows a multi-carrier structure used in the LTE_A system.
- three component carriers having a frequency size of 20 MHz are combined.
- the UE may simultaneously monitor three component carriers, receive downlink signals / data, and transmit uplink signals / data.
- the network may allocate M (M ⁇ N) DL CCs to the terminal.
- the UE may monitor only M limited DL CCs and receive a DL signal.
- the network may give priority to L (L ⁇ M ⁇ N) DL CCs and allocate them to the UE as a main DL CC. In this case, the UE must monitor the L DL CCs. This method can also be applied to uplink transmission.
- the LTE-A system uses the concept of a cell to manage radio resources.
- the cell is defined by a combination of downlink resources and uplink resources, and uplink resources may be selectively defined.
- the cell may be configured with only downlink resources or with downlink resources and uplink resources.
- multicarrier ie carrier aggregation
- the linkage between the carrier frequency (or DL CC) of the downlink resource and the carrier frequency (or UL CC) of the uplink resource is indicated by the system information.
- the cell used in the LTE-A system is a concept including a primary cell (PCell) and a secondary cell (SCell).
- the P cell may mean a cell operating on a primary frequency (or primary CC)
- the S cell may mean a cell operating on a secondary frequency (or secondary CC).
- only one P cell is allocated to a specific terminal, and one or more S cells may be allocated.
- the PCell is used for the UE to perform an initial connection establishment process or to perform a connection re-establishment process.
- the Pcell may refer to a cell indicated in the handover process.
- the SCell can be configured after the RRC connection is established and can be used to provide additional radio resources.
- P cell and S cell may be used as a serving cell.
- the carrier aggregation is not configured or does not support the carrier aggregation
- one or more serving cells may exist, and the entire serving cell includes a PCell and one or more SCells.
- the E-UTRAN may configure a network including one or more Scells in addition to the Pcells initially configured in the connection establishment process.
- the Pcell and the Scell may operate as respective component carriers. That is, carrier matching may be understood as a combination of a Pcell and one or more Scells.
- the primary component carrier (PCC) may be used in the same sense as the PCell, and the secondary component carrier (SCC) may be used in the same sense as the SCell.
- FIG. 6 is a diagram illustrating a case in which a PUCCH signal is piggybacked in a PUSCH region.
- a first subframe indicates a case in which a PUCCH signal and a PUSCH signal are simultaneously transmitted.
- a PUCCH signal and a PUSCH signal are transmitted in a PUCCH region and a PUSCH region, respectively. The case is shown.
- a peak-to-average power ratio (PAPR) characteristic or a cubic metric that affects the performance of the power amplifier is used. It is desirable to maintain a single carrier property having good) properties.
- the data to be transmitted maintains the single carrier characteristic through DFT-precoding, and when the UE transmits the PUCCH signal, the PUCCH is transmitted in a sequence having a single carrier characteristic.
- Single carrier characteristics can be maintained by carrying a signal.
- each terminal preferably reports its possible power headroom information to the base station.
- the base station may use a power headroom report (PHR) received from each terminal to determine an available uplink bandwidth for each subframe.
- PHR power headroom report
- the power headroom report ranges from 40 dB to -23 dB in 1 dB increments.
- the range of '-' value in the power headroom reporting range indicates a range in which each terminal can transmit a signal to the base station using more transmission power than the transmission power allocated through the UL grant.
- the PHR enables the base station to reduce the size of the next UL grant (ie, the number of RBs in the frequency domain) and release the transmission resources to be allocated to other terminals.
- the PHR may be transmitted in a subframe in which the UE has an uplink transmission grant.
- PHR is related to the subframe in which the PHR is transmitted.
- Equation 1 a method for calculating a power headroom (PHR) value by the terminal is shown in Equation 1 below.
- P CMAX represents the theoretical maximum transmission power of the configured UE
- M PUSCH (i) is a parameter indicating the bandwidth of the PUSCH resource allocation expressed by the number of effective resource blocks for the subframe of the index i, a value allocated by the base station to be.
- P O_PUSCH (j) is a parameter configured by the sum of the cell-specific nominal component P O_NOMINAL_PUSCH (j) provided from the upper layer and the terminal-specific component P O_UE_PUSCH (j) provided in the upper layer. This is the value to tell.
- ⁇ (j) is a value that the base station informs the terminal.
- f (i) is a value indicating the current PUSCH power control adjustment state and may be expressed as a current absolute value or an accumulated value.
- the power headroom (PH) consists of 64 levels of values 1dB apart from -23 decibels (dB) to 40dB, and is passed from the physical layer to the upper layer.
- the PH MAC control element is identified by the MAC PDU subheader.
- each terminal may be assigned one or more serving cells, and one of the serving cells may be a Pcell.
- the terminal preferably performs a PHR procedure for one or more serving cells. Therefore, hereinafter, a method for performing a PHR process when a Pcell and one or more Scells are allocated to a terminal will be described in detail.
- the PHR process refers to a process of calculating a PH for a cell allocated by the terminal in the physical layer of the terminal and reporting the PH to the base station.
- the terminal may include information on a difference between theoretical maximum transmission power of the terminal and measured transmission power of the terminal for an uplink shared channel (UL-SCH, PDSCH, etc.) in each activated serving cell (eg, For example, the first type ePH value) may be provided to the base station.
- UL-SCH uplink shared channel
- PDSCH PDSCH
- the first type ePH value may be provided to the base station.
- information on the difference between the theoretical maximum transmission power of the terminal and the measured transmission power of the terminal for the uplink shared channel (UL-SCH) and the PUCCH in the Pcell and the terminal (for example, the second type ePH value)
- information about a difference between the maximum transmit power and the measured transmit power of the UE for the uplink shared channel (UL-SCH, PDSCH, etc.) may be provided to the base station.
- Embodiments of the present invention are applied to the LTE-A system, to distinguish the PHR of the present invention and the PHR of the existing LTE R-8 PHR of the present invention will be referred to as extended PHR (ePHR: extend PHR). That is, the terminal may transmit the first type ePH value to the base station in the serving cell and the first type ePH value and the second type ePH value in the Pcell to perform the ePHR process. In this case, the terminal may transmit information on the maximum transmit power of the terminal to the base station when reporting the power headroom.
- ePHR extend PHR
- the physical layer of the terminal calculates the power headroom (first type ePH) value for the PUSCH of the activated serving cell, and calculates the first type ePH value and the maximum transmit power (P MAX, c ) of the terminal.
- the information is transmitted to an upper layer (eg, MAC or RRC layer) of the terminal.
- the upper layer of the terminal may transmit information on the first type ePH and P MAX, c to the base station.
- the physical layer of the terminal calculates information on the first type ePH, the second type ePH and the maximum transmit power (P MAX, c ) of the terminal in the activated primary cell (P cell) and transmits to the upper layer of the terminal
- the upper layer of the terminal may transmit information on the second type PHR information and P MAX, c to the base station.
- FIG. 7 illustrates a method in which a terminal transmits a data signal and a control signal using three serving cells (e.g. UL CC).
- UL CC1 denotes a Pcell
- the UE may transmit a control signal (UCI, that is, a PUCCH signal) and a data signal (eg, a PUSCH signal) through the Pcell.
- UL CC2 and UL CC3 represents an SCell, the terminal may transmit a PUSCH signal through the SCell.
- FIG. 7A illustrates a case in which the terminal operates in mode A
- FIG. 7 (b) illustrates a case in which the terminal operates in mode B.
- Mode A represents a case in which the UE can simultaneously transmit the PUSCH signal and the PUCCH signal in the same subframe.
- a UE in mode A simultaneously transmits a PUCCH signal and a PUSCH signal in a first subframe of a PCell (ie, UL CC1), and transmits only a PUCCH signal without a PUSCH in a second subframe, and a third subframe. Transmits only the PUSCH signal without the PUCCH signal.
- the UE may transmit the PUSCH signal through the PUSCH region in the SCell (ie, UL CC2 and UL CC3).
- Mode B represents a case in which the UE cannot simultaneously transmit the PUSCH signal and the PUCCH signal in the same subframe.
- the UE in mode B may piggyback or multiplex the PUCCH signal UCI to the PUSCH in UL CC1 (serving cell). That is, the UE may not transmit a control signal (e.g. UCI) through the PUCCH region but may piggyback and transmit the data signal to the PUSCH region.
- a control signal e.g. UCI
- the terminal when the terminal is configured in mode A, the first type power headroom value and the second type power headroom value may be calculated and reported to the base station.
- the terminal when the terminal is configured as mode B, the terminal may calculate and report a first type power headroom value to the base station.
- FIG. 7 a method of transmitting an uplink control signal and a data signal in a Pcell has been described.
- the control signal and the data signal may be transmitted in any serving cell other than the Pcell.
- the UE reports power headroom (PHR). ) Will be described.
- FIG. 8 is a diagram illustrating an example of a method for reporting power headroom of a terminal according to a transmission mode according to an embodiment of the present invention.
- the UE may negotiate which transmission mode to operate through higher layer signaling with the eNB. That is, the terminal may operate in the transmission mode A or B described with reference to FIG. 7 according to the negotiation result with the base station.
- the UE may receive a PDCCH signal including uplink resource allocation information (eg UL Grant) for one or more serving cells in a carrier aggregation (CA) environment from a base station eNB (S810). .
- uplink resource allocation information eg UL Grant
- CA carrier aggregation
- the terminal may be assigned one or more cells (ie, one or more CC). In this case, the terminal may operate in the same transmission mode or independent transmission mode for each assigned cell.
- the terminal may communicate with the base station through the allocated uplink. That is, the terminal may transmit PUCCH and / or PUSCH signals with the base station as mode A or mode B in the i-th subframe in one or more cells (S820).
- the terminal may trigger the ePHR process when any one of the following events is satisfied. That is, the terminal may (1) expire a first timer (eg, prohibitPHR-Timer) that prohibits power headroom reporting (PHR), or a first timer expires in at least one active serving cell and a transmission path loss. if the change in (pathloss) is greater than a preset value (e.g., DL_PathlossChange dB), (2) the second timer (e.g., PeriodicPHR-Timer), which is a periodic report timer, has expired, or (3) upwards When the S cell including the link is activated, the first type ePH and / or the second type ePH may be calculated (S830).
- a first timer eg., prohibitPHR-Timer
- PHR power headroom reporting
- the terminal When the terminal operates in the transmission mode B, the terminal may report the first type ePH for the current subframe (i) of the serving cell c to the base station. In addition, when the terminal operates in the transmission mode A, the terminal may report the first type ePH and the second type ePH for the current subframe (i) of the primary cell to the base station.
- step S830 the first type of ePH and / or the second type of ePH is calculated in the physical layer of the terminal and delivered to an upper layer (eg, MAC layer and / or RRC layer) of the terminal.
- the upper layer of the terminal receives one or more ePH values from the physical layer and reports them to the base station for the PHR process.
- the terminal may transmit the maximum transmit power value of the terminal used when calculating each ePH to the base station (S840).
- the terminal may transmit one or more ePH to the base station using an extended power headroom MAC control element (eg, a report message).
- an extended power headroom MAC control element eg, a report message
- the terminal may report the ePH for each cell and the maximum transmit power of the terminal to the base station.
- the base station may schedule uplink radio resources based on one or more ePH values received from the respective terminals and allocate them to each terminal.
- the base station transmits a PDCCH signal including a UL grant (UL Grant) to each terminal to inform the information on the radio resources allocated to the terminal (S850).
- UL Grant UL grant
- step S830 in order for the UE to calculate the first type ePH, the UE may calculate an ePH for power of the PUSCH.
- the terminal may calculate the first type of ePH by using Equation 1.
- the parameter of Equation 1 is used in any subframe i of the serving cell c allocated to the terminal.
- the terminal may calculate the ePH for the sum of the power of the PUSCH and the power for the PUCCH (that is, the sum of the PH of the PUSCH and the PUCCH) in order for the terminal to calculate the second type of ePH.
- Equation 2 represents one of the formulas for calculating the second type of ePH.
- a UE shows a method of calculating an ePH using a power amount of PUSCH (P PUSCHc_scheduled (i)) and a power amount of PUCCH (P PUCCHc_scheduled (i)). That is, the terminal may calculate one ePH value for the sum of the power amount of the PUSCH and the power amount of the PUCCH. Equation 2 shows a case in which a UE simultaneously transmits a PUSCH signal and a PUCCH signal in the same subframe in a Pcell.
- Equation 3 shows a formula for calculating the amount of power of the PUCCH used to calculate the second type of ePH.
- P CMAX represents the theoretical maximum transmission power of the terminal in the P cell or the serving cell
- M PUSCH (i) is a parameter representing the bandwidth of the PUSCH resource allocation expressed as the number of effective resource blocks for the subframe of the index i, The value assigned by the base station.
- P O_PUSCH (j) is a parameter configured by the sum of the cell-specific nominal component P O_NOMINAL_PUSCH (j) provided from the upper layer and the terminal-specific component P O_UE_PUSCH (j) provided in the upper layer. This is the value to tell.
- ⁇ (j) is a value that the base station informs the terminal.
- f (i) is a value indicating the current PUSCH power control adjustment state and may be expressed as a current absolute value or an accumulated value.
- Equation 4 represents one of formulas for calculating the amount of power of the PUCCH used in Equation 2.
- Equation 5 represents another one of formulas for calculating the amount of power of the PUCCH used in Equation 2.
- Equations 4 and 5 are parameters provided to the physical layer from the upper layer of the terminal, The value corresponds to the PUCCH format (F) associated with the PUCCH format 1a.
- the terminal is configured to transmit the PUCCH on two antenna ports from the upper layer.
- the value is provided to the lower layer in each upper layer where the PUCCH format F 'is defined.
- h (n CQI , n HARQ ) and h (n CQI , n HARQ , n SR ) are values dependent on the PUCCH format, and n CQI corresponds to the number of information bits for the CQI. If the subframe i is configured for the scheduling request for the terminal, n SR is set to 1, otherwise it is set to 0.
- n HARQ indicates the number of HARQ bits or the number of transport blocks in subframe i.
- P O_PUCCH represents a parameter configured by the sum of parameters P O_NOMIMAL_PUCCH and P O_UE_PUCCH provided from an upper layer.
- g (i) represents the current PUCCH transmission control adjustment status value
- g (0) represents the initial value after the reset.
- Equation 6 represents another one of formulas for calculating the second type of ePH.
- Equation 6 shows a method of calculating ePH in consideration of the amount of PUCCH power even when the UE transmits only the PUSCH signal without transmitting the PUCCH signal in the Pcell.
- Equation 6 is a method of obtaining PH for the sum of the power of the currently transmitted PUSCH and the PUCCH power excluding the offset related to the transmission format among the allocated power of the PUCCH.
- the power amount of the PUCCH is a closed loop parameter dynamically accumulated up to P O_PUCCH (j), which is an open loop parameter of PUCCH, and PL and i th subframe, which are path loss compensation values of the i th subframe, which is the current frame. It can be obtained as a value g (i).
- equations (4) and (5) For descriptions of the remaining parameters, reference may be made to equations (4) and (5).
- PUSCH and PUCCH may be simultaneously transmitted in any subframe of any serving cell.
- the base station should properly allocate the PUSCH resource to one or more terminals, and it is preferable that the terminal is scheduled so as not to exceed the limited transmit power of the serving cell.
- ePHR extended power headroom reporting
- Each UE may transmit PUSCH power headroom information and PUCCH power headroom information of a corresponding serving cell to each base station in every subframe in which PHR of the UE should be transmitted.
- a terminal configured with mode A transmits two types of PUSCH PHR and PUCCH PHR information of a Pcell (UL CC1) to a base station, and a PUSCH PHR in an S cell (UL CC2 and UL CC3) in which only PUSCH is transmitted. Only information can be given.
- the UE When the UE is configured in mode B, the UE does not simultaneously transmit the PUSCH signal and the PUCCH signal in each PUSCH region and the PUCCH region in any subframe in order to maintain a single carrier characteristic.
- the UE since many RBs are not used only by PUCCH transmission of the terminal, the case where the power limit of the corresponding CC will not be frequently generated.
- a PUCCH signal as a control signal is piggybacked or multiplexed with a PUSCH signal as a data signal and transmitted through a PUSCH region, a terminal configured with mode B does not need to report power headroom for a PUCCH and power headroom for a PUSCH signal. Only information can be transmitted to the base station.
- the UE may transmit the PUSCH and the PUCCH in the same subframe in the Pcell. That is, the terminal simultaneously transmits the PUSCH signal and the PUCCH signal in the Pcell as shown in FIG. In this case, the terminal preferably transmits the PHR for the sum of the PHR for the PUSCH and the PHR for the PUCCH to the base station.
- the PUCCH signal may be transmitted by being piggybacked or multiplexed on the PUSCH signal in a subframe in which the PUSCH signal and the PUCCH signal are to be transmitted as shown in FIG. In this case, it is sufficient for the terminal to transmit only the PHR for the PUSCH to the base station.
- a method of reporting an ePH for the sum of the PUSCH power amount and the PUCCH power amount may be considered. That is, even when only the PUSCH signal is transmitted, the UE may report the ePH for the sum of the PUSCH power and the PUCCH power.
- Equation 7 shows another one of a method of calculating an ePH for a sum of a PUSCH power amount and a PUCCH power amount.
- Equation 7 shows a method of obtaining a power headroom (PH) of the UE for a sum of the power of the currently transmitted PUSCH and the power of the most recently transmitted PUCCH. That is, in Equation 7, the power amount of the PUCCH is for the k-th (eg, k ⁇ i) subframe.
- FIG. 9 illustrates an example of an apparatus supporting the power headroom reporting method disclosed in the present invention as an embodiment of the present invention.
- the wireless communication system may include one or more base stations (BSs) 10 and one or more terminals (UEs).
- BSs base stations
- UEs terminals
- the transmitter operates as part of the base station 10 and the receiver operates as part of the terminal 20.
- the transmitter may operate as part of the terminal 20 and the receiver may operate as part of the base station 10.
- Base station 10 may include a processor 11, a memory 12, and a radio frequency (RF) unit 13.
- the processor 11 may be configured such that the procedures and / or methods proposed in the embodiments of the present invention are implemented.
- the processor 11 of the base station may perform uplink resource scheduling in consideration of an uplink resource scheduling and allocation function for the terminal and a PHR received from the terminal.
- the memory 12 interlocks with the processor and stores various information to be operated in the processor.
- the RF unit 13 interworks with the processor 11 and transmits and receives wireless signals.
- the terminal 20 may include a processor 21, a memory 22, and a radio frequency (RF) unit 23.
- the processor 21 may be configured such that the procedures and / or methods proposed in the embodiments of the present invention are implemented.
- the processor of the terminal may monitor the search space by using an RF unit to decode the PDCCH transmitted to it, and detect the DCI format included in the PDCCH to obtain information about the uplink resource allocated thereto. have.
- a power headroom value according to a power amount calculation and a transmission mode in a subframe may be calculated and reported to the base station.
- the memory 22 cooperates with the processor and stores various information to be operated in the processor.
- the RF unit 23 interworks with the processor 11 and transmits and receives wireless signals.
- the base station 10 and / or the terminal 20 may be provided with a single antenna or multiple antennas.
- the wireless communication system may be referred to as a multi-input multi-output (MIMO) system.
- MIMO multi-input multi-output
- FIG. 10 is a view showing another example of an apparatus supporting the power headroom reporting method disclosed in the present invention as an embodiment of the present invention.
- the mobile station UE may operate as a transmitter in uplink and as a receiver in downlink.
- the eNB may operate as a receiver in uplink and as a transmitter in downlink.
- the mobile terminal and the base station may include a transmission module (Tx module: 1040, 1050) and a reception module (Rx module: 1050, 1070), respectively, to control the transmission and reception of information, data, and / or messages.
- Antennas 1000 and 1010 for transmitting and receiving information, data, and / or messages.
- the mobile station and the base station each include a processor 1020 and 1030 for performing the above-described embodiments of the present invention and a memory 1080 and 1090 for temporarily or continuously storing the processing of the processor. can do.
- the processors 1020 and 1030 may perform the second type ePH report and the first type ePH report method according to the transmission modes A and B of the UE in the carrier matching environment disclosed in the embodiments of the present invention.
- the mobile terminal and the base station of FIG. 10 may further include a low power radio frequency (RF) / intermediate frequency (IF) module.
- RF radio frequency
- IF intermediate frequency
- the transmission module and the reception module included in the mobile station and the base station include a packet modulation and demodulation function, a high speed packet channel coding function, an orthogonal frequency division multiple access (OFDMA) packet scheduling, and a time division duplex (TDD) for data transmission.
- OFDMA orthogonal frequency division multiple access
- TDD time division duplex
- Division Duplex may perform packet scheduling and / or channel multiplexing.
- the apparatus described in FIG. 10 is a means by which the various power headroom reporting methods disclosed herein can be implemented. Embodiments of the present invention can be performed using the components and functions of the above-described mobile terminal and base station apparatus.
- the mobile terminal is a personal digital assistant (PDA), a cellular phone, a personal communication service (PCS) phone, a GSM (Global System for Mobile) phone, a WCDMA (Wideband CDMA) phone, A mobile broadband band system (MBS) phone, a hand-held PC, a notebook PC, a smart phone, or a multi-mode multi-band (MM-MB) terminal may be used.
- PDA personal digital assistant
- PCS personal communication service
- GSM Global System for Mobile
- WCDMA Wideband CDMA
- MBS mobile broadband band system
- hand-held PC a notebook PC
- smart phone or a multi-mode multi-band (MM-MB) terminal
- MM-MB multi-mode multi-band
- a smart phone is a terminal that combines the advantages of a mobile communication terminal and a personal portable terminal, and may mean a terminal incorporating data communication functions such as schedule management, fax transmission and reception, which are functions of a personal mobile terminal, in a mobile communication terminal.
- a multimode multiband terminal can be equipped with a multi-modem chip to operate in both portable Internet systems and other mobile communication systems (e.g., code division multiple access (CDMA) 2000 systems, wideband CDMA (WCDMA) systems, etc.). Speak the terminal.
- CDMA code division multiple access
- WCDMA wideband CDMA
- Embodiments of the invention may be implemented through various means.
- embodiments of the present invention may be implemented by hardware, firmware, software, or a combination thereof.
- the method according to embodiments of the present invention may include one or more application specific integrated circuits (ASICs), digital signal processors (DSPs), digital signal processing devices (DSPDs), programmable logic devices (PLDs). Field programmable gate arrays (FPGAs), processors, controllers, microcontrollers, microprocessors, and the like.
- ASICs application specific integrated circuits
- DSPs digital signal processors
- DSPDs digital signal processing devices
- PLDs programmable logic devices
- FPGAs Field programmable gate arrays
- processors controllers, microcontrollers, microprocessors, and the like.
- the method according to the embodiments of the present invention may be implemented in the form of a module, procedure, or function that performs the functions or operations described above.
- software code may be stored in the memory units 1080 and 1090 and driven by the processors 1020 and 1030.
- the memory unit may be located inside or outside the processor, and may exchange data with the processor by various known means.
- Embodiments of the present invention can be applied to various wireless access systems.
- Examples of various radio access systems include 3GPP LTE systems, 3GPP LTE-A systems, 3GPP2 and / or IEEE 802.16m systems.
- Embodiments of the present invention can be applied not only to the various radio access systems, but also to all technical fields to which the various radio access systems are applied.
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Abstract
Description
PUCCH 포맷 | UCI |
Format 1 | 스케줄링 요청(SR) |
Format 1a | SR을 포함하거나 포함하지 않는 1비트 HARQ ACK/NACK |
Format 1b | SR을 포함하거나 포함하지 않는 2비트 HARQ ACK/NACK |
Format 2 | CQI(20 coded Bits) |
Format 2 | CQI 및 확장 CP에 대한 1 또는 2 비트의 HARQ ACK/NACK |
Format 2a | CQI 및 1 비트의 HARQ ACK/NACK |
Format 2b | CQI 및 2 비트의 HARQ ACK/NACK |
Claims (15)
- 멀티케리어 시스템에서 단말의 파워 헤드룸 보고방법에 있어서,단말이 상향링크 자원할당 정보를 포함하는 물리하향링크 제어채널(PDCCH) 신호를 기지국으로부터 수신하는 단계;상기 단말이 전송모드에 따라 물리상향링크 공유채널(PUSCH) 신호 및 물리상향링크 제어채널(PUCCH) 신호 중 적어도 하나를 상기 상향링크 자원할당 정보를 기반으로 소정의 서브프레임에서 상기 기지국으로 전송하는 단계;상기 단말이 상기 전송모드에 따라 상기 소정 서브프레임에서의 하나 이상의 파워 헤드룸값을 계산하는 단계; 및상기 단말이 상기 하나 이상의 파워 헤드룸 값을 상기 기지국에 보고하는 단계를 더 포함하고,상기 단말이 전송 모드 A로 동작하는 경우에는 상기 소정 서브프레임에서의 상기 단말의 제 1 타입 파워 헤드룸 값 및 제 2 타입 파워 헤드룸 값을 보고하고, 상기 단말이 전송 모드 B로 동작하는 경우에는 상기 제 1 타입 파워 헤드룸 값을 보고하는, 파워 헤드룸 보고 방법.
- 제 1항에 있어서,상기 단말이 상기 전송 모드 A이면, 상기 단말은 P셀(Primary Cell)의 상기 소정 서브프레임에서 상기 PUSCH 신호 및 상기 PUCCH 신호를 상기 기지국에 전송하고,상기 단말이 상기 전송 모드 B이면, 상기 단말은 서빙 셀의 상기 소정 서브프레임에서 상기 PUSCH 신호를 상기 기지국에 전송하는, 파워 헤드룸 보고 방법.
- 제 2항에 있어서,상기 전송 모드 A에서, 상기 PUCCH 신호 및 상기 PUSCH 신호는 각각 PUCCH 영역 및 PUSCH 영역을 통해 전송되고,상기 전송 모드 B에서, 상기 PUCCH 신호는 상기 PUSCH 신호에 피기백되어 PUSCH 영역을 통해 전송되는, 파워 헤드룸 보고 방법.
- 제 2항에 있어서,상기 제 1 타입 파워 헤드룸 값은 상기 단말의 최대 전송 전력 및 상기 PUSCH 신호의 전송 전력을 이용하여 계산되고,상기 제 2 타입 파워 헤드룸 값은 상기 단말의 최대 전송 전력, 상기 PUSCH 신호의 전송 전력 및 상기 PUCCH 신호의 전송 전력을 이용하여 계산되는, 파워 헤드룸 보고 방법.
- 제 4항에 있어서,상기 제 1 파워 헤드룸 값은 상기 최대 전송 전력과 상기 PUCCH 신호의 전송 전력의 차이값을 이용하여 계산되고,상기 제 2 파워 헤드룸 값은 상기 최대 전송 전력과 상기 PUSCH 신호의 전송 전력 및 상기 PUCCH 신호의 전송 전력의 합과의 차이값을 이용하여 계산되는, 파워 헤드룸 보고 방법.
- 제 4항에 있어서,상기 제 2 타입 파워 헤드룸 값은,상기 소정 서브프레임에서 상기 PUCCH 신호가 전송되지 않는 경우에도 상기 PUCCH 신호의 전송 전력을 이용하여 계산되는, 파워 헤드룸 보고 방법.
- 제 2항에 있어서,상기 보고 메시지는 상기 단말의 상기 최대 전송 전력 값을 더 포함하는, 파워 헤드룸 보고 방법.
- 멀티케리어 시스템에서 파워 헤드룸 보고를 수행하는 단말에 있어서,채널 신호를 수신하기 위한 수신 모듈;채널 신호를 전송하기 위한 송신 모듈; 및상기 파워 헤드룸 보고를 수행하기 위한 기능을 지원하는 프로세서를 포함하되,상기 단말은,상향링크 자원할당 정보를 포함하는 물리하향링크 제어채널(PDCCH) 신호를 상기 수신모듈을 이용하여 기지국으로부터 수신하고,전송모드에 따라 물리상향링크 공유채널(PUSCH) 신호 및 물리상향링크 제어채널(PUCCH) 신호 중 적어도 하나를 상기 상향링크 자원할당 정보를 기반으로 소정의 서브프레임에서 상기 송신 모듈을 통해 상기 기지국으로 전송하고,상기 소정 서브프레임에서의 하나 이상의 파워 헤드룸 값을 프로세서에서 계산하고,상기 전송모드에 따라 상기 하나 이상의 파워 헤드룸 값을 상기 송신 모듈을 통해 상기 기지국에 보고하며,상기 단말이 전송 모드 A로 동작하는 경우에는 상기 소정 서브프레임에서의 상기 단말의 제 1 타입 파워 헤드룸 값 및 제 2 타입 파워 헤드룸 값을 보고하고, 상기 단말이 전송 모드 B로 동작하는 경우에는 상기 제 1 타입 파워 헤드룸 값을 보고하는 것을 특징으로 하는, 단말.
- 제 10항에 있어서,상기 단말이 상기 전송 모드 A이면, 상기 단말은 P셀(Primary Cell)의 상기 소정 서브프레임에서 상기 PUSCH 신호 및 상기 PUCCH 신호를 상기 송신모듈을 이용하여 상기 기지국에 전송하고,상기 단말이 상기 전송 모드 B이면, 상기 단말은 서빙 셀의 상기 소정 서브프레임에서 상기 PUSCH 신호를 상기 송신모듈을 이용하여 상기 기지국에 전송하는, 단말.
- 제 11항에 있어서,상기 제 1 파워 헤드룸 값은 상기 최대 전송 전력과 상기 PUSCH 신호의 전송 전력의 차이값을 이용하여 계산되고,상기 제 2 파워 헤드룸 값은 상기 최대 전송 전력과 상기 PUSCH 신호의 전송 전력 및 상기 PUCCH 신호의 전송 전력의 합과의 차이값을 이용하여 계산되는, 단말.
- 제 11항에 있어서,상기 제 2 타입 파워 헤드룸 값은,상기 소정 서브프레임에서 상기 PUCCH 신호가 전송되지 않는 경우에도 상기 PUCCH 신호의 전송 전력을 이용하여 계산되는, 단말.
- 제 11항에 있어서,상기 전송 모드 A에서, 상기 PUCCH 신호 및 상기 PUSCH 신호는 각각 PUCCH 영역 및 PUSCH 영역을 통해 전송되고,상기 전송 모드 B에서, 상기 PUCCH 신호는 상기 PUSCH 신호에 피기백되어 PUSCH 영역을 통해 전송되는, 단말.
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US20130258980A1 (en) | 2013-10-03 |
CN102742331A (zh) | 2012-10-17 |
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CN102742331B (zh) | 2015-08-26 |
EP2503830A4 (en) | 2015-07-29 |
US20160262119A1 (en) | 2016-09-08 |
KR101672285B1 (ko) | 2016-11-03 |
KR101366335B1 (ko) | 2014-03-12 |
EP2503830A2 (en) | 2012-09-26 |
KR20140057631A (ko) | 2014-05-13 |
CN105007148A (zh) | 2015-10-28 |
KR20130135370A (ko) | 2013-12-10 |
US9363771B2 (en) | 2016-06-07 |
WO2011122910A3 (ko) | 2012-02-02 |
US9094925B2 (en) | 2015-07-28 |
US20170188315A1 (en) | 2017-06-29 |
EP2503830B1 (en) | 2020-06-03 |
US8462705B2 (en) | 2013-06-11 |
US9107176B2 (en) | 2015-08-11 |
US9918287B2 (en) | 2018-03-13 |
CN105007148B (zh) | 2018-07-20 |
US20150304967A1 (en) | 2015-10-22 |
US20130250889A1 (en) | 2013-09-26 |
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