WO2014010994A1 - 무선 접속 시스템에서 안테나 포트향 참조 신호 전송 방법 - Google Patents
무선 접속 시스템에서 안테나 포트향 참조 신호 전송 방법 Download PDFInfo
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- WO2014010994A1 WO2014010994A1 PCT/KR2013/006275 KR2013006275W WO2014010994A1 WO 2014010994 A1 WO2014010994 A1 WO 2014010994A1 KR 2013006275 W KR2013006275 W KR 2013006275W WO 2014010994 A1 WO2014010994 A1 WO 2014010994A1
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- antenna port
- antenna
- base station
- transmission
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Classifications
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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
- H04L5/0048—Allocation of pilot signals, i.e. of signals known to the receiver
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04B—TRANSMISSION
- H04B7/00—Radio transmission systems, i.e. using radiation field
- H04B7/02—Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas
- H04B7/04—Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas using two or more spaced independent antennas
- H04B7/06—Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas using two or more spaced independent antennas at the transmitting station
- H04B7/0613—Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas using two or more spaced independent antennas at the transmitting station using simultaneous transmission
- H04B7/0667—Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas using two or more spaced independent antennas at the transmitting station using simultaneous transmission of delayed versions of same signal
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04B—TRANSMISSION
- H04B7/00—Radio transmission systems, i.e. using radiation field
- H04B7/02—Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas
- H04B7/04—Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas using two or more spaced independent antennas
- H04B7/06—Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas using two or more spaced independent antennas at the transmitting station
- H04B7/0613—Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas using two or more spaced independent antennas at the transmitting station using simultaneous transmission
- H04B7/0667—Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas using two or more spaced independent antennas at the transmitting station using simultaneous transmission of delayed versions of same signal
- H04B7/0671—Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas using two or more spaced independent antennas at the transmitting station using simultaneous transmission of delayed versions of same signal using different delays between antennas
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04B—TRANSMISSION
- H04B7/00—Radio transmission systems, i.e. using radiation field
- H04B7/02—Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas
- H04B7/04—Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas using two or more spaced independent antennas
- H04B7/08—Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas using two or more spaced independent antennas at the receiving station
- H04B7/0891—Space-time diversity
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04B—TRANSMISSION
- H04B7/00—Radio transmission systems, i.e. using radiation field
- H04B7/02—Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas
- H04B7/04—Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas using two or more spaced independent antennas
- H04B7/08—Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas using two or more spaced independent antennas at the receiving station
- H04B7/0891—Space-time diversity
- H04B7/0894—Space-time diversity using different delays between antennas
-
- 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
- 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
- H04W88/00—Devices specially adapted for wireless communication networks, e.g. terminals, base stations or access point devices
- H04W88/02—Terminal devices
Definitions
- the present invention relates to a wireless access system, and more particularly, to a method of transmitting a channel status information reference signal (CSI-RS) by different transmission periods for each antenna port or antenna port set, and supporting the same. It relates to a device to.
- CSI-RS channel status information reference signal
- Wireless access systems are widely deployed to provide various kinds of communication services such as voice and data.
- a wireless access system is a multiple access system that can support communication with multiple users by sharing available system resources (bandwidth, transmission power, etc.).
- multiple access systems include: code division multiple access (CI) systems, frequency division multiple access (I MA) systems, time division multiple access (TDMA) systems, orthogonal frequency division multiple access (0FDMA) systems, SC And a single carrier frequency division multiple access (FDMA) system.
- CI code division multiple access
- I MA frequency division multiple access
- TDMA time division multiple access
- OFDMA orthogonal frequency division multiple access
- SC single carrier frequency division multiple access
- An object of the present invention is to provide an efficient reference signal transmission method.
- Another object of the present invention is to provide a method of varying a transmission period of a reference signal for each antenna port in a mast antenna environment.
- Another object of the present invention is to provide a method of varying a transmission period of a reference signal for each antenna set in a massive antenna environment.
- Another object of the present invention is to provide a method for acquiring and transmitting channel state information when a transmission cycle of a reference signal is different for each antenna or antenna set.
- the present invention relates to a wireless access system.
- CSI-RS channel status information reference signals
- a channel state information reference signal in a wireless access system is provided.
- a method of receiving a L0 call includes receiving a CSI-RS configuration information element for setting a transmission period of a CSI-RS differently for two or more antenna ports and a CSI-RS configuration information element. Receiving the CSI-RS for each of the two or more antenna ports based on the channel information may be obtained for each of the two or more antenna ports based on the received CSI-RS.
- a terminal for receiving a channel state information reference signal (CSI-RS) in a wireless access system may include a transceiver for signal transmission and reception and a processor for controlling CSI-RS reception.
- the processor receives the CSI-RS configuration information element for differently setting the transmission period of the CSI-RS for the two or more antenna ports using the transceiver, based on the CSI-RS configuration information element
- the processor 10 may receive CSI-RS for each of two or more antenna ports.
- the processor may be configured to acquire channel state information for each of two or more antenna ports based on the received CSI-RS.
- the CSI-RS configuration information element may include two or more subframe configuration parameters indicating respective transmission periods for two or more antenna ports.
- the terminal may report the measured channel status ⁇ to the base station.
- the channel state information may be transmitted through a physical uplink control channel (PUCCH) or a physical uplink shared channel (PUSCH).
- PUCCH physical uplink control channel
- PUSCH physical uplink shared channel
- a method for receiving a CSI-RS reference signal (CSI-RS) in a wireless access system may include differently setting transmission periods of CSI-RSs for two or more antenna port sets.
- channel state information is true in a wireless access system.
- the terminal for receiving the 5 co-signals may include a transceiver and a processor for controlling the CSI-RS reception.
- the processor receives a CSI-RS configuration information element for differently setting the transmission period of the CSI-RS for two or more antenna port sets using a transceiver, and based on the CSI-RS configuration information element two or more antennas Receives CSI-RS for each set of ports, but the processor receives the received CSI—RS
- It may be configured to obtain channel state information for each of two or more antenna port sets based on L0.
- the CSI—RS configuration information element may include two or more subframe configuration parameters indicating respective transmission periods for two or more antenna port sets.
- the one or more antenna port sets may each include one or more antenna ports.
- the terminal may report the measured channel state information to the base station.
- the channel state information may be transmitted through a physical uplink control channel (PUCCH) or a physical uplink shared channel (PUSCH).
- PUCCH physical uplink control channel
- PUSCH physical uplink shared channel
- the present invention can efficiently transmit a reference signal for 3D beamforming having different angular changes for horizontal / vertical beamforming.
- a transmission period of a reference signal may be different for each antenna port in a massive antenna environment.
- the transmission period of the reference signal may be different for each antenna set in the massive antenna environment.
- the channel estimation for the downlink channel can be effectively performed by varying the CSI-RS transmission period for each antenna port or antenna port set.
- FIG. 1 is a diagram for explaining physical channels and a signal transmission method using the same in embodiments of the present invention.
- FIG. 2 illustrates a structure of a radio frame used in embodiments of the present invention.
- FIG. 3 illustrates a resource grid for a downlink slot that may be used in embodiments of the present invention.
- FIG. 4 shows a structure of an uplink subframe that can be used in embodiments of the present invention.
- FIG. 20 shows the structure of a downlink subframe that can be used in embodiments of the present invention.
- FIG. 6 is a diagram illustrating various configurations of a massive antenna that may be used in embodiments of the present invention.
- FIG. 7 is a diagram illustrating an example of a bump forming that can be used in an embodiment of the present invention.
- FIG. 8 illustrates a relationship between a base station and a terminal when performing beamforming in a vertical direction
- FIG. 9 illustrates a relationship between a base station and a terminal when performing beamforming in a horizontal direction.
- FIG. 11 is a diagram illustrating one method of transmitting CSI-RS configuration information 30 for 3D bump forming according to an embodiment of the present invention.
- 12 is a means in which the methods described with reference to FIGS. 1 to 11 may be implemented.
- Embodiments of the present invention provide various methods for transmitting different transmission periods of channel status information reference symbols (CSI-RS) for each antenna port or antenna port set, and support the same. Provide devices.
- CSI-RS channel status information reference symbols
- 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 any other component or feature.
- 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 configurations or features of one embodiment may be included in another embodiment L5 example, or may be replaced with other configurations or features of another embodiment.
- the base station has a meaning as a terminal node of a network that directly communicates with a mobile station. Certain operations 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 including a plurality of network nodes including a base station may be performed by a network station other than the base station or the base station.
- the 'base station' is referred to by terms such as a fixed station, a Node B, an eNode B (eNB), an advanced base station (ABS), or an access point.
- a terminal may be a user equipment (UE), a mobile station (MS), a subscriber station (SS), or a mobile subscriber station (MSS) It may be replaced with terms such as Subscriber Station, Mobile Terminal, or Advanced Mobile Station (AMS).
- UE user equipment
- MS mobile station
- SS subscriber station
- MSS mobile subscriber station
- AMS Advanced Mobile Station
- 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 can be a transmitting end and a base station can be a receiving end. Similarly, in downlink, the mobile station
- L0 is the receiving end, and the base station may be the transmitting end.
- Embodiments of the present invention may be supported by standard documents disclosed in at least one of the IEEE 802.11 system, the 3rd Generation Partnership Project (3GPP) system, the 3GPP LTE system, and the 3GPP2 system, which are wireless access systems.
- embodiments of the present invention include 3GPP TS 36.211, 3GPP TS 36.212, 3GPP TS 36.213 and 3GPP TS.
- timing advance TA used in the embodiments of the present invention may be used in the same meaning as terms such as time priority, timing adjustment, or time adjustment.
- CDMA code division multiple access
- FDMA frequency division multiple access
- TDMA time division multiple 30 access
- SC orthogonal frequency division multiple access
- FDMA single carrier frequency division multiple access
- CDMA may be implemented by radio technology such as UTRA Jniversal Terrestrial Radio Access) or CDMA2000.
- TDMA may be implemented in a wireless technology such as Global System 5 for Mobile communication (GSM) / General Packet Radio Ser- vice (GPRS) / Enhanced Data Rates for GSM Evolution (EDGE).
- GSM Global System 5 for Mobile communication
- GPRS General Packet Radio Ser- vice
- EDGE Enhanced Data Rates for GSM Evolution
- 0FDMA may be implemented with a radio technology such as IEEE 802.11 (Wi-Fi), IEEE 802.16 (WiMAX), IEEE 802-20, Evolved UTRA (EHJTRA).
- UTRA is part of the LTS of the UMTS Jniversal Mobile Telecom unicat ions System.
- 3GPP LTECLong Term Evolution (3GPP) is part of an Evolved UMTS (EHMTS) using EHJTRA, and employs 0FDMA in downlink and SC-FDMA in uplink.
- the LTE-A (Advanced) system is an improved system of the 3GPP LTE system.
- embodiments of the present invention will be described mainly for the 3GPP LTE / LTE-A system, but can also be applied to IEEE 802.16e / m system.
- a terminal receives information from a base station through downlink (DL) and transmits information to a base station through uplink (UL).
- the information transmitted and received between the base station and the terminal includes general data information and various control information, and various physical channels exist according to the type / use of the information transmitted and received.
- FIG. 1 is a diagram for explaining physical channels that can be used in embodiments of the present invention and a signal transmission method using the 15.
- the UE In the state in which the power is turned off, the UE is turned on again or enters a new cell, and performs an initial cell search operation such as synchronizing with the base station in step S11. To this end, the UE receives a primary synchronization channel (P-SCH) and a floating channel (S—SCH: Secondary 30 Synchronization Channel) from the base station, synchronizes with the base station, and obtains information such as a cell ID. Subsequently, the terminal may receive a physical broadcast channel (PBCH) signal from the base station and acquire broadcast information in a cell. On the other hand, the UE may check the downlink channel state by receiving a downlink reference signal (DL RS) in the initial cell search step.
- P-SCH primary synchronization channel
- S—SCH Secondary 30 Synchronization Channel
- the UE After completing initial cell search, the UE performs a physical downlink control channel in step S12.
- PDCCH physical downlink control channel
- PDSCH physical downlink control channel
- the terminal performs subsequent steps S13 to to complete access to the base station.
- a random access procedure as in step S16 may be performed.
- the UE transmits a preamble through a physical random access channel (P ACH) (S13), and a preamble through a physical downlink control channel and a physical downlink shared channel.
- the answer message can be received (S14).
- the UE is configured to add additional physical random access channel signals.
- the UE After performing the above-described procedure, the UE subsequently receives a physical downlink control channel signal and / or a physical downlink shared channel! 0 signal (S17) and a physical uplink as a general uplink / downlink signal transmission procedure.
- a physical channel uplink shared channel (PUSCH) signal and / or a physical uplink control channel (PUCCH) signal may be transmitted (S18).
- UCI uplink control information
- HARQ-ACK / NACK! 5 Hybrid Automatic Repeat and reQuest Acknowledgement / Negative-ACK
- SR Scheduling Request
- CQI Channel Quality Indication
- PMI Precoding Matrix Indication
- RI Rank Indication
- UCI is generally transmitted periodically through a PUCCH, but may be transmitted through a PUSCH when control information and traffic data should be transmitted at the same time.
- the UCI can be aperiodically transmitted through the PUSCH by the network request / instruction.
- 2 shows a structure of a radio frame used in embodiments of the present invention.
- the type 1 frame structure can be applied to both full duplex Frequency Division Duplex (FDD) 5 systems and half duplex FDD systems.
- FDD Frequency Division Duplex
- One subframe is defined as two consecutive slots, and the i-th subframe consists of slots corresponding to 2i and 2i + l.
- a radio frame consists of 10 subframes.
- the time taken to transmit one subframe is called ⁇ (transmission time interval).
- the slot includes a plurality of 0FDM symbols or SOFDMA symbols in the time domain and includes a plurality of resource blocks in the frequency domain.
- One slot includes a plurality of OFDM orthogonal frequency division multiplexing) symbols in the time domain. Since 3GPP LTE uses 0FDMA in downlink, the 0FDM symbol is used to represent one symbol period. The 0FDM symbol may be referred to as one SC-FDMA symbol or symbol period.
- a resource block is a unit of resource allocation, and a plurality of consecutive subunits in one slot
- 10 subframes may be used simultaneously for downlink transmission and uplink transmission during each 10 ms period. At this time, uplink and downlink transmission are separated in the frequency domain.
- the terminal cannot transmit and receive at the same time.
- the structure of the above-described radio frame is only one example, and the number of subframes included in the radio frame, the number of slots included in the subframe, and the number of 0FDM symbols included in the slot may vary. can be changed.
- FIG. 2 (b) shows a frame structure type 2.
- Type 2 frame structure is applied to the TDD system.
- the type 2 frame includes a special subframe consisting of three fields: a downlink pilot time slot (D ⁇ vPTS), a guard period (GP), and an uplink pilot time slot (UpPTS).
- D ⁇ vPTS downlink pilot time slot
- GP guard period
- UpPTS uplink pilot time slot
- the DwPTS is used for initial cell search, synchronization or channel estimation in the terminal.
- UpPTS is used to match the channel estimation at the base station with the uplink synchronization of the terminal.
- the guard period is a period for removing interference caused in the uplink due to the multipath delay of the downlink signal between the uplink and the downlink.
- the following table 1 shows the structure of a special frame (length of DwPTS / GP / UpPTS).
- FIG. 3 is a diagram illustrating a resource grid for a downlink slot that can be used in embodiments of the present invention.
- one downlink slot includes a plurality of 0FDM symbols in the time domain.
- one downlink slot includes seven 0FDM symbols and one resource block includes 12 subcarriers in the frequency domain, but is not limited thereto.
- Each element is a resource element on a resource grid, and one resource block includes 12 ⁇ 7 resource elements.
- Downlink The number NDL of the resource blocks included in the slot depends on the downlink transmission bandwidth.
- the structure of the uplink slot may be the same as the structure of the downlink slot.
- FIG. 4 shows a structure of an uplink subframe that can be used in embodiments of the present invention.
- an uplink subframe may be divided into a control region and a data region in the frequency domain.
- the control region is allocated a PUCCH carrying uplink control information.
- the data area is allocated a PUSCH carrying user data.
- one UE does not simultaneously transmit a PUCCH and a PUSCH.
- the PUCCH is allocated an RB pair in a subframe. RBs belonging to the RB pair occupy different subcarriers in each of the two slots. This RB pair allocated to the PUCCH is said to be frequency hopping at the slot boundary (slot boundary).
- FIG. 5 shows a structure of a downlink subframe that can be used in embodiments of the present invention.
- up to three OFDM symbols from the OFDM symbol index 0 in the first slot in a subframe are control regions to which control channels are allocated, and the remaining OFDM symbols are data regions to which a PDSCH is allocated. (data region).
- An example of a downlink control channel used in 3GPP LTE includes a Physical Control Format Indicator Channel (PCFICH), a PDCCH, and a Physical Hybrid-ARQ Indicator Channel (PHICH).
- PCFICH Physical Control Format Indicator Channel
- PDCCH Physical Hybrid-ARQ Indicator Channel
- PHICH Physical Hybrid-ARQ Indicator Channel
- the PCFICH is transmitted in the first OFDM symbol of a subframe and carries information about the number of OFDM symbols (ie, the size of the control region) used for transmission of control channels in the subframe.
- the PHICH is a male answer channel for the uplink, and carries an ACK (Acknowledgement) / Negative-Acknowledgement (NACK) signal for a hybrid automatic repeat request (HA Q).
- Control information transmitted through the PDCCH is called downlink control information (DCI).
- the downlink control information includes uplink resource allocation information, downlink resource allocation information, or an uplink transmission (Tx) power control command for a certain terminal group.
- the PDCCH includes resource allocation and transmission format of DL-SCH (ie, DL-Grant) and resource allocation information of UL-SCH (Uplink Shared Channel).
- DL-SCH resource allocation and transmission format
- UL-SCH Uplink Shared Channel
- Link Grant UL-Grant
- PCH Paging on Paging Channels
- system information in the DL-SCH resource allocation for upper layer control messages, such as random access response transmitted in the PDSCH, for individual terminals in any terminal group.
- a set of transmission power control commands and information on whether voice over IP (VoIP) is activated can be carried.
- VoIP voice over IP
- a plurality of PDCCHs may be transmitted in the control region, and the terminal may include a plurality of PDCCHs.
- the PDCCH consists of a collection of one or several consecutive CCEs (aggregat ions).
- the PDCCH composed of one or several consecutive CCEs may be transmitted through the control region after subblock interleaving.
- CCE is a logical allocation unit used to provide a PDCCH with a coding rate according to the state of a radio channel.
- CCE is a plurality of
- the format of the PDCCH and the number of possible PDCCH bits are determined by the correlation between the number of CCEs and the coding rate provided by the CCEs.
- a plurality of multiplexed PDCCHs for a plurality of terminals may be transmitted in the control region.
- the PDCCH consists of one or more consecutive CCE aggregat ions.
- CCE refers to a unit that spans nine sets of REGs consisting of four resource elements.
- QPSK Quadrature Phase Shift Keying
- RS reference signal
- the original elements are not included in the REG. That is, the total number of REGs in the 0FDM symbol may vary depending on whether a cell specific reference signal exists.
- the concept of REG for mapping four resource elements to one group may be applied to other downlink control channels (eg, PCFICH or PHICH). Not assigned to PCFICH or PHICH
- REG REG
- the number of CCEs available in the system is ⁇ CCE ⁇ REG ⁇ J
- each CCE has an index from 0 to ⁇ CCE-I.
- the base station may use ⁇ 1, 2, 4, 8 ⁇ CCEs to configure one PDCCH signal, wherein ⁇ 1, 2, 4, 8 ⁇ is called a CCE aggregation level. .
- the number of CCEs used for transmission of a specific PDCCH is determined by the base station according to the channel state. For example, good downlink channel conditions
- One CCE may be sufficient for a PDCCH for a terminal having a case (near to the base station).
- eight CCEs may be required for sufficient robustness.
- the power level of the PDCCH may also be adjusted to match the channel state.
- Table 2 shows the PDCCH formats, and four PDCCH formats are supported as shown in Table 2 according to the CCE aggregation level.
- MCS level refers to the code rate and modulation sequence used for data coding.
- the redundancy MCS level is used for link adaptation. In general, three to four MCS levels may be considered in a control channel for transmitting control information.
- control information transmitted through the PDCCH is referred to as downlink control information (DCI).
- DCI downlink control information
- the configuration of information carried in the PDCCH payload may vary depending on the DCI format.
- the PDCCH payload means an information bit. Table 3 below shows DCI according to DCI format.
- a DCI format includes a format 0 for PUSCH scheduling, a format 1 for scheduling one PDSCH codeword, and a format 1A and DL for compact scheduling of one PDSCH codeword.
- format 1C Closed-loop spatial multiplexing mode for very simple scheduling of -SCH
- formats 2 for PDSCH scheduling There are formats 2 for PDSCH scheduling, formats 2A for PDSCH scheduling in Openloop spatial multiplexing mode, and formats 3 and 3A for transmission of TPCC Transmission Power Control (MDC) command for an uplink channel.
- DCI format 1A may be used for PDSCH scheduling regardless of which transmission mode is configured for the UE.
- the PDCCH payload length may vary depending on the DCI format.
- DCI format the DCI format.
- the type and length thereof according to the .0 PDCCH payload may vary depending on whether it is a simple scheduling or a transmission mode configured in the terminal.
- the transmission mode may be configured for the UE to receive downlink data through the PDSCH.
- the downlink data through the PDSCH may be scheduled data, paging, random access answer or the like for the UE.
- the transmission mode may be set semi-statically to the terminal through higher layer signaling (for example, R C (Radio Resource Control) signaling).
- the transmission mode may be classified into single antenna transmission or multi-antenna transmission.
- the UE sets a transmission mode semi-statically through higher layer signaling.
- multi-antenna transmission includes transmit diversity, open-loop or closed-loop spatial multiplexing, and MU-MIM0 (Mult i-user-Mult iple Input). Mult iple Output) or Bemforniing.
- Transmit diversity is a technique of increasing transmission reliability by transmitting the same data from multiple transmit antennas.
- Spatial multiplexing allows multiple transmit antennas It is a technology that can transmit high speed data without increasing bandwidth of system by transmitting different data at the same time.
- Beamforming is a technique to increase the signal-to-interference plus noise ratio of a signal by applying weighting values according to channel conditions in multiple antennas.
- the DCI format is dependent on a transmission mode configured in a terminal (depend on).
- the UE has a reference DCI format that monitors according to the total gun mode set to the UE.
- the transmission mode set in the terminal may have seven transmission modes as follows. '
- the base station determines the PDCCH format according to the DCI to be transmitted to the terminal and attaches a CRCCCycHc Redundancy Check to the control information.
- CRC contains the owner of the PDCCH.
- a unique identifier eg. RNTKRadio Network Temporary Identifier
- owner or a unique identifier (eg RNTKRadio Network Temporary Identifier) is masked by purpose. If it is a PDCCH for a specific UE, a unique identifier (eg, C-RNTKCell-RNTI) of the UE may be masked on the CRC. Alternatively, if the PDCCH is for a paging message, a paging indication identifier (eg, P-RNTKPaging-RNTI) may be masked to the CRC.
- System information more specifically system information blocks
- a system information identifier eg, SI-RNTI (system information RNTI)
- SI-RNTI system information RNTI
- RA-RNTI random access-RNTI
- the base station performs channel coding on the control information added with the CRC to perform sub-coding.
- channel coding may be performed at a code rate according to the MCS level.
- the base station according to the CCE aggregation level assigned to the PDCCH format Rate matching is performed, and modulation symbols are generated by modulating the encoded data.
- a modulation sequence according to the MCS level may be used.
- the modulation symbols constituting one PDCCH may have one of 1, 2, 4, and 8 CCE aggregation levels.
- the base station maps modulation symbols to physical resource elements (CCE to RE mapping).
- a plurality of PDCCHs may be transmitted in one subframe. That is, the control region of one subframe includes a plurality of CCEs having indices 0 to ⁇ co ⁇ ⁇ 1.
- N CCE . k means the total number of CCEs in the control region of the k- th subframe.
- the UE monitors a plurality of PDCCHs in every subframe. Here, monitoring means that the UE attempts to decode each of the PDCCHs according to the monitored PDCCH format.
- blind decoding refers to a method in which a UE de-masks its UE ID in a CRC portion and then checks the CRC error to determine whether the corresponding PDCCH is its control channel.
- the UE monitors the PDCCH of every subframe in order to receive data transmitted to the UE.
- the UE wakes up in the monitoring interval of every DRX cycle and monitors the PDCCH in the subframe corresponding to the monitoring interval.
- the subframe in which PDCCH monitoring is performed is called a non-DRX subframe.
- the UE In order to receive the PDCCH transmitted to the UE, the UE should perform blind decoding on all CCEs present in the control region of the non-DRX subframe. Since the UE does not know which PDCCH format is transmitted, it is necessary to decode all PDCCHs at the possible CCE aggregation level until PDCCH and blind decoding succeed in every non-DRX subframe. How many CCEs does the PDCCH use for the UE? Since we do not know, we should attempt detection at all possible CCE aggregation levels until the blind decoding of the PDCCH is successful.
- a search space (SS) concept is defined for blind decoding of a terminal.
- the search space means a set of 5 PDCCH candidates for the UE to monitor and may have a different size according to each PDCCH format.
- the search space may be composed of a common search space (CSS: Common Search Space) and a UE-specific search space (USS: UE-specific / Dedicated Search Space).
- the terminals can know the size of the common search space, but the terminal specific search space can be set to L0 for each terminal individually. Accordingly, the UE must monitor both the UE-specific search space and the common search space in order to decode the PDCCH, thus performing a maximum of 44 blind decoding (BD) in one subframe. This does not include blind decoding performed according to different CRC values (eg, C-RNTI, P-RNTI, SI-RNTI, RA-RNTI).
- CRC values eg, C-RNTI, P-RNTI, SI-RNTI, RA-RNTI.
- the base station may not be able to secure the CCE resources for transmitting the PDCCH to all the terminals to transmit the PDCCH in a given subframe. This is because resources remaining after the CCE location is allocated may not be included in the search space of a specific UE.
- a terminal specific hopping sequence may be applied to the starting point of the terminal specific search space to minimize this barrier that may continue to the next subframe.
- Table 4 shows the sizes of the common search space and the terminal specific search space.
- the UE does not simultaneously perform searches according to all defined DCI formats. Specifically, the terminal always performs a search for DCI formats 0 and 1A in the UE-specific search space. At this time, DCI formats 0 and 1A have the same size, but the UE is a PDCCH
- the DCI format may be distinguished by using a flag used to distinguish DCI formats 0 and 1A included in the flag.
- a terminal may require a DCI format other than DCI format 0 and DCI format 1A. Examples of DCI formats 1, 1B, and 2 may be required.
- the UE may search for DCI formats 1A and 1C.
- the UE may be configured to search for DCI format 3 or 3A, and DCI formats 3 and 3A have the same size as DCI formats 0 and 1A, but the UE uses a CRC scrambled by an identifier other than the UE specific identifier.
- the DCI format can be distinguished.
- the search space 5 shape represents a PDCCH candidate set according to a set level ⁇ 2 , 4 , or 8 ).
- the CCE according to the PDCCH candidate set of the search space may be determined by Equation 1 as follows. -
- the UE monitors both the UE-specific search space and the common search space to decode the PDCCH.
- the common search space (CSS) supports PDCCHs having an aggregation level of ⁇ 4, 8 ⁇
- the UE specific search space supports PDCCHs having an aggregation level of ⁇ 1, 2, 4, 8 ⁇ . do.
- Table 5 shows PDCCH candidates monitored by the terminal.
- the UE-specific search space for the aggregation level L is defined as in Equation 2.
- 3GPP LTE (3rd Gene rat ion Partnership Project Long Term
- LTE systems use a multi-carrier modulation (MCM) scheme that divides a single component carrier (CC) into multiple bands.
- MCM multi-carrier modulation
- CC component carrier
- LTE-A system 3GPP LTE-Advanced system
- CA Carrier Aggregat ion
- Multi-CC multi-component carrier environment
- the multi-carrier is used to combine the carrier (or carrier aggregation) of the carrier.
- the merge of carriers means not only merge between contiguous carriers but also merge between non-contiguous carriers.
- the number of component carriers aggregated between downlink and uplink may be set differently. The case where the number of downlink component carriers (hereinafter referred to as 'DL CC') and the number of uplink component carriers (hereinafter referred to as 'UL CC') is the same is called symmetric merging.
- carrier aggregation may be commonly used with terms such as carrier aggregation, bandwidth aggregation, spectrum aggregation, and the like.
- Carrier aggregation in which two or more component carriers are combined, aims to support up to 100 MHz bandwidth in an LTE-A system.
- Target band report
- the bandwidth can be limited to the bandwidth used by the existing system to maintain backward compatibility with the existing IMT system.
- 3GPP LTE-advanced system ie, LTE-A
- LTE-A 3GPP LTE-advanced system
- the carrier aggregation system used in the present invention may support carrier aggregation by defining a new bandwidth regardless of the bandwidth used in the existing system.
- the carrier aggregation may be divided into an intra-band CA and an inter-band CA.
- Intra-band carrier coalescing means that a plurality of DL CCs and / or UL CCs are located adjacent to or adjacent in frequency. In other words, it may mean that the carrier frequencies of the DL CCs and / or UL CCs are located in the same band.
- an environment far from the frequency domain may be called an inter-band CA. In other words, it may mean that the carrier frequencies of the plurality of DL CCs and / or UL CCs are located in different bands.
- the terminal may use a plurality of RF radio frequency) stages to perform communication in a carrier aggregation environment.
- LTE-A system uses the concept of a cell (cell) to manage radio resources.
- the carrier aggregation environment described above may be referred to as a multiple cell environment.
- a cell is defined as a combination of a downlink resource (DL CC) and an uplink resource (UL CC), but the uplink resource is not an essential element. Therefore, the SAL may be composed of only downlink resources or downlink resources and uplink resources.
- a specific UE when a specific UE has only one configured serving cell, it may have one DL CC and one UL CC, but the specific UE has two or more configured serving cells. In the case, there are as many DL CCs as the number of cells and the number of UL CCs may be equal to or less than that. Or, conversely, DL CC and UL CC may be configured. That is, when a specific UE has a plurality of configured serving cells, a carrier aggregation environment in which a UL CC has more than the number of DL CCs may be supported.
- carrier merge may be understood as a merge of two or more cells, each having a different carrier frequency (center frequency of the cell).
- Cell Cell 'is different from' cell 'as a geographical area covered by a commonly used base station. Should be distinguished.
- intra-band multi-cell intra-band multi-cell
- inter-band carrier merging is referred to as inter-band multi-cell.
- Cells used in the LTE-A system include a primary cell (PCell) and a secondary cell (SCell). Psal and Scell serving 'sal
- serving Cell can be used.
- the carrier aggregation is not configured or does not support the carrier aggregation
- the UE in the case of the UE is in the R C_C0NNECTED state and the carrier aggregation is set, one or more serving cells may exist, and the entire serving cell includes a P cell and one or more S cells.
- Serving Cells may be configured through RRC parameters.
- PhysCellld is the cell's physical layer identifier and has an integer value from 0 to 503.
- SCelllndex is a short identifier used to identify Ssal and has an integer value from 1 to 7.
- ServCelllndex is a short identifier used to identify a serving cell (P cell or S cell) and has an integer value from 0 to 7. 0 value
- SCelllndex is pre-assigned for application to S cells. That is, the cell having the smallest cell ID (or sal index) in ServCelllndex becomes Psal.
- a P cell means a cell operating on a primary frequency (or a primary CO.
- the UE may be used to perform an initial connection establishment process or to perform a connection re-establishment process. In the over process
- P cell refers to a cell serving as a center of control-related communication among serving cells configured in a carrier aggregation environment. That is, the UE can receive and transmit the PUCCH only in its own P cell, and can use only the P cell to obtain system information or change the monitoring procedure.
- Evolved Universal Terrestrial Radio Access (E-UTRAN) provides mobility control to terminals supporting carrier aggregation environments
- the S sal may refer to 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 S Sal is configurable after the RRC connection is made and no additional Can be used to provide line resources.
- PUCCH does not exist in the remaining cells excluding the p cell, that is, the S cell, among the serving cells configured in the carrier aggregation environment.
- E—UTRAN may perform dedicated signaling with different parameters for each terminal, rather than broadcasting in a related S cell.
- the E-UTRAN may configure a network that includes one or more Ssals in addition to the Psalms initially configured in the connection setup process.
- the P cell and the SCell may operate as respective component carriers.
- the primary component carrier (PCC) may be used in the same sense as the P cell, and the secondary component carrier (SCC) may be used for the S cell.
- .5 may be used in the same sense.
- Massive MIMO uses a large number of antennas to maximize beam gain and eliminate the effects of intra-cell interference (ICI) and noise: 0.
- the transmission scheme may be different depending on the duplex scheme such as TDD and FDD.
- the downlink and the uplink use the same frequency band and are divided by time. Therefore, it can be assumed that the characteristics of the downlink and uplink radio channels are the same when the coherence time of the radio channel is large, that is, when the Doppler effect (velocity) on the speed is small. (This is called reciprocity). Accordingly, the base station performs channel estimation using reference signals (RSs) of the UEs transmitted in the uplink and transmits downlink data using the channel information estimated during downlink transmission.
- RSs reference signals
- the base station since the base station does not need to transmit a separate downlink RS in order to obtain the downlink channel information, the base station has a resource overhead in view of resource overhead.
- the massive MIM0 which can gain and uses a large number of antennas, it does not need to use as many RSs as the number of transmitting antennas.
- the gap for the transit ion guard time on the frame structure should be considered.
- the larger the cell coverage the longer the transmission protection time, and this lowers the throughput.
- the TDD system is more limited in cell coverage than the FDD system.
- the TDD system is to control the interference effect between neighboring base stations.
- TDD Time Division Duplex Downlink
- the FDD in order to acquire channel information for downlink, the FDD must transmit RS and avoid channel information from the UE.
- FIG. 6 is a diagram illustrating various configuration forms of a massive antenna that may be used in embodiments of the present invention.
- the antennas are arranged in a structure.
- the antenna of the ULA type is extended in a two-dimensional form, which is horizontal compared to FIG. 6 (a).
- the structure of the massive antenna shown in FIG. 6 is only an example, and the massive antenna may be configured using various antennas.
- FIG. 7 is a diagram illustrating an example of a bump forming that can be used in an embodiment of the present invention.
- beamforming may be performed in a horizontal direction and a vertical direction as shown in FIG. 7. Through this, 3D beamforming or full dimension beamforming may be performed.
- Fixed vertical Fixed vertical sectorization (Static 5 vertical sector izat ion) means using the vertical beam to divide the inside / outside sector within a single cell coverage. The sector at this time may be an actual physical sector or cell or a concept of a virtual sector or virtual cell.
- FIG. 7 (a) shows an example of semi-static vertical sectorized bump forming
- FIG. 7 (b) shows an example of dynamic three-dimensional vertical sectorized bump forming.
- a geographic area within one cell may be sectored in a donut shape
- beamforming may be performed only for a specific terminal.
- FIG. 8 illustrates a relationship between a base station and a terminal when performing vertical bump forming
- FIG. 9 illustrates a relationship between a base station and a terminal when performing horizontal bump forming.
- a typical celller network operates three sectors or cells in one site, and a base station is provided to secure L0S or transmit efficiently to terminals.
- This arrangement of cells causes a difference for the vertical beam and the horizontal beam.
- the difference in this case means that the amount of change in the angle of the beam transmitted by the base station depends on the vertical direction or the horizontal direction when a channel change occurs between the base station and the terminal due to the movement of the terminal.
- ⁇ 5 Right, when the altitude of the base station is h, and the terminal is moved by X from the base station, and the angle between the base station and the terminal is ⁇ , the value of ⁇ may be expressed as arctans.
- the altitude of the base station is set to about tens of meters, and the radius of the base station is assumed to be several hundred meters to several kilometers, and thus satisfies h ⁇ r, span. At this time,
- the above equation is not satisfied. However, the above equation is often satisfied when considering the distribution of the UE over the area of the cell.
- the beam pattern sent to the terminal may act more sensitively than the vertical direction in the horizontal variation.
- Embodiments of the present invention described below propose an efficient operation method of RS that a UE can use to perform CQI or PMI feedback for downlink using the above-described characteristics.
- the LTE Release 10 system (hereinafter referred to as Rel-8) includes a cell specific reference signal (CRS) for channel measurement for CQI feedback and channel estimation for PDSCH. Reference Signal) is proposed.
- CRS cell specific reference signal
- Rel-10 the LTE-A Release 10
- CSI-RS Channel
- State Information Reference Signal has been proposed.
- FIG. 10 is a diagram illustrating an example of a mapping structure of CSI-RS that can be used in embodiments of the present invention.
- CRS and DAL CSI-RS has been proposed up to 32 different CSI configurations to reduce inter-cell interference (ICI) in multi-cell environments, including heterogeneous network (HetNet) environments.
- the configuration of the CSI-RS is different depending on the number of ports of the antenna in the cell, and is configured to have different CSI-RS configurations as much as possible between adjacent cells. In addition, this is classified according to the CP type, and divided into a case of applying to both FS1 and FS2 and a case of supporting only FS2 according to the frame structure (FS) type.
- the CSI-RS-Configuration Information Element is used to specify a CSI-RS configuration.
- Table 6 shows an example of the CSI-RS configuration information elements.
- a parameter indicates how many antennas the CSI RS is transmitted (choose from 1, 2, 4, 8) (see TS 36.211 [21, 6.10.5]).
- the parameter indicates the Pc parameter (see TS 36.213 [23, 7.2.5].)
- Resource configuration esourceConfi ' g The parameter indicates which RE the CSI RS is located in one RB in time-resource frequency ( TS 36.211 (21, table 6.10.5.2-1 and 6.10.5.2-2).
- Subframe configuration subframeConfig indicates in which subframe the CSI-RS is transmitted, and the CSI-RS EPRE value for the PDSCH EPRE is transmitted.
- the eNB may also transmit information on the zero power CSI-RS (see TS 36.211 [21, table 6.10.5.3-1]).
- the zero transmit power resource configuration list (zeroTxPowerResourceConfigList) parameter indicates the configuration of the zero power CSI-RS transmitted in a specific RB (see TS 36.211 [21, 6.10.5.2]).
- Zero transmit power sub-V ⁇ ⁇ eroTxPow rSubframeConfig) parameter includes zero power CSI-RS.
- Multiple CSI RS configurations which are zero or one configuration in which the UE configures zero transmission power for the corresponding CSI-RS and zero or more configurations that the terminal configures in zero transmission power, may be used in a given cell.
- the UE shall commence in the 4 CSI RS columns of Tables 7 and 8, excluding resource elements overlapping with the zero transmit power CSI-RS constructed by the higher layer. Can be assumed to be zero transmit power.
- the MSB Most Significant Bit
- the bitmap serves the smallest CSI RS configuration index, and consecutive bits in the bitmap serve each CSI RS configuration in ascending order.
- the CSI reference signals may be allocated only to downlink slots of n s mod 2 that satisfy the conditions of Tables 7 and 8.
- the UE transmits specific subframes, CSI-RS transmission of synchronization signals, PBCH, or System Information Block Type 1 message. Subframes that may collide with the transmission,
- Table 7 The following Table 8 shows a mapping relationship of CSI RS configuration to resource elements (k ', ⁇ ) for extended cyclic prefixes.
- Subframe configuration period T CSI - RS and subframe offset A CSI RS indicating a position where a CSI-RS exists is listed in Table 9 below.
- the I csi-RS parameter may be configured separately for CSI-RSs for which the UE estimates non-zero and zero transmit power.
- Subframes including CSI-RSs may be transmitted in a subframe that satisfies Equation 3 below.
- TCSI-RS is a CSI-RS transmission period
- a CSI — RS is an offset value
- n f is a system frame number
- n s is a slot number, respectively.
- a base station transmits a CSI-RS configuration information element (CSI-RS Configuration IE) to each terminal by using a higher layer signal.
- the CSI-RS configuration information element may include information on a transmission period for each antenna port for 3D beamforming (S1110).
- the base station transmits a PDSCH signal based on the CSI-RS configuration information element, and the terminal may measure channel state information (CSI) for the PDSCH based on the received CSI-RS configuration information element.
- CSI channel state information
- the terminal may report the measured CSI to the base station through the PUCCH signal and / or PUSCH signal (S1140).
- the base station may differently set a CSI-RS transmission period of a logical antenna port mapped to a vertical physical antenna or used for vertical bumping.
- the CSI-RS configuration information element of step S1110 of FIG. 11 may include parameters for differently setting a transmission cycle for each antenna port. To do this, the configuration for each antenna port must be defined separately. In order to set the period for each antenna port, it is preferable to set the CSI-RS subframe configuration (I CSI - RS ) parameter value for each antenna port. Table 10 below shows an example of CSI-RS subframe configuration parameters defined for each antenna port.
- Table 10 it is assumed that there are a maximum of eight antenna ports. If 3D beamforming is used, more antenna ports may be used than in Table 10. In this case, CSI-RS subframe configuration parameters may be set for each antenna port.
- Table 11 shows an example of CSI configuration information elements including CSI-RS subframe configuration parameters defined for each antenna port described in Table 10.
- subf rameConf ig antennaPort 15 INTEGER (0. .154), subframeConf i g-ant ennaPort 16 INTEGER (0 .154), subfr ameCon fig-ant ennaPor tl7 INTEGER (0 .154), subf r araeConf i g-ant ennaPort 18 INTEGER (0. .154), subframeConf ig-antennaPort 19 INTEGER (0. .154), subframeConf i g-ant ennaPort 20 INTEGER (0.
- subframeConf ig-ant ennaPort 21 INTEGER (0 .154)
- subf rameConf ig-antennaPort22 INTEGER (0. .154)
- pC-rl0 INTEGER (-8..15)
- CSI-RS configuration information elements described in Table 10 and Table 11 an example of each anteo method for configuring a "or another period CSI-RS for each.
- CSI-RS configuration information elements may be configured by assigning values for other parameter values (for example, resourceConfig, pC) included in the CSI-RS configuration information element for each antenna. In this embodiment of the present invention to allocate a CSI-RS value having a different period for each antenna
- the CSI-RS configuration for each antenna port must be configured through a higher layer signal (eg, RRC signaling), and thus, L5 overhead may be applied to a higher layer.
- a higher layer signal eg, RRC signaling
- L5 overhead may be applied to a higher layer.
- two or more bundles of antennas By defining the CSI-RS can be configured. Tables 12 and 13 below show examples in the case of dividing into two sets of antenna ports.
- the antenna port sets separated as shown in Table 12 and Table 13 may apply different CSI-RS configurations to each set.
- antenna ports with antenna port numbers 15, 16, 17, and 18 constitute one set
- antenna ports with 19, 20 21, and 22 constitute another set.
- the antenna port set is divided by an antenna set number (antennaSetNuniber) parameter, and each antenna port set uses a different CSI-RS transmission period.
- the CSI-RS transmission period for each antenna port set may be expressed as shown in Table 14 below, and may be represented by an Abstract Syntax Notation code.
- Table 15 shows an example of CSI-RS configuration information elements for different CSI-RS transmission periods for each antenna port set described in Tables 12 to 14.
- the CSI—RS configuration information element of Table 15 may be used in step S1110 of FIG. 11.
- Table 16 shows an example of the CSI—RS configuration information element in case of two antenna sets.
- antennaPor t sCount-r 10 ENUMERATED ⁇ anl, an2, an4, an8 ⁇ resourceConf ig-rlO INTEGER (0..31),
- Table 16 shows that the subframe configuration parameter is displayed in multiple forms according to the antenna sets. If there are three or more antenna sets, the subframe configuration parameters may be multiplied according to the number of antenna sets.
- Table 17 shows one of the tables for mapping the CSI-RS configuration used in the case of the Normal Cyclic Prefix to the RE.
- Table 18 shows one of the tables for mapping the used CSI-RS configuration of Extended Cyclic Prefix to RE.
- the CSI-RS configuration is set to be twice as long as before.
- the CSI-RS configuration may be additionally inserted by a certain number of times longer or shorter than twice the period.
- the terminal when the terminal receives the CSI-RS configuration index included in the CSI-RS configuration information element through higher layer signaling, the terminal according to the number of antenna ports in Table 17 and Table 18, the last CSI-RS In the case of a configuration, the transmission period of the CSI-RS can be transmitted differently according to twice the period or a multiple determined by the system.
- a method of adjusting a CSI-RS transmission period is a method of modifying an equation disclosed in Equation 3 for a specific CSI-RS configuration. .
- Equation 4 is a modification of Equation 3.
- the k value may be fixed and used in the system as any fixed constant value, or may be transmitted to the terminal along with specific CSI RS configuration information through higher layer signaling. That is, when using Equation 4, the CSI-RSs may be transmitted with a periodicity by a constant k value.
- the apparatus described with reference to FIG. 12 is a means by which the methods described with reference to FIGS. 1 through 11 may be implemented.
- a user equipment may operate as a transmitter in uplink and operate as a receiver in L0 downlink.
- an e-Node B eNB
- eNB e-Node B
- the terminal and the base station may include a transmission module (Tx module: 1240, 1250) and a reception module (Rx module: 122 to 1270), respectively, to control transmission and reception of information, data, and / or messages.
- antennas 1200 and 1210 for transmitting and receiving information, data, and / or messages.
- the transmitting module and the receiving module may be configured as transceivers that simultaneously perform transmission and reception.
- the terminal and the base station respectively, the processor (Processor: 1220, 1230) for performing the above-described embodiments of the present invention and the memory (1280, 1290) that can temporarily or continuously store the processing of the processor
- the processor of the base station may configure the CSI-RS by separately using or combining the methods described in Sections 1 to 4 described above, and the UE generates the CSI-RS configuration information element through higher layer signaling. Can be sent to.
- the UE may know a CSI-RS transmission> 5 pattern, a transmission period, and the like based on the received CSI-RS configuration information element. Therefore, the terminal may receive the CSI-RS based on this information.
- the transmission module and the reception module included in the terminal and the base station include a packet modulation / demodulation function, a high-speed packet channel coding function, an orthogonal frequency division multiple access (0FDMA) packet scheduling, time division 30 duplex (TDD: Time Division Duplex) packet scheduling and / or channel multiplexing Can be done.
- the terminal and the base station of FIG. 12 may further include a low power RF (Radio Frequency) / IF (Intermediate Frequency) module.
- the terminal is a personal digital assistant (PDA), a cell phone, a personal communication service (PCS) phone, a 5 GSM (Global System for Mobile) phone, a WCDM wideband CDMA.
- PDA personal digital assistant
- PCS personal communication service
- 5 GSM Global System for Mobile
- CDMA Code Division Multiple Access
- MBS Mobile Broadband System
- Hand-Held PCs Hand-Held PCs
- notebook PCs Smart Phones
- Multi-Mode Multi-band (MB) can be.
- a smart phone is a terminal that combines the L0 point of a mobile communication terminal and a personal portable terminal.
- the smart phone is a data communication function such as schedule management, fax transmission and Internet access, which are functions of a personal portable terminal. It can mean the terminal integrated.
- multimode multiband terminals have built-in multi-moment chips that can operate in both portable Internet systems and other mobile communication systems (e.g., CDMA Code Division Multiple Access) 2000 systems, WCDMA (Wideband CDMA) systems, etc.). That says 5 terminals.
- Embodiments of the present 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 the embodiments of the present invention may include? 0 or more ASICs (applied cationic specific integrated circuits), DSPs (digital signal processors), and DSPDs (digital signal processing). devices), programmable logic devices (PLDs), field programmable gate arrays (FPGAs), processors, controllers, microcontrollers, and microprocessors.
- ASICs applied cationic specific integrated circuits
- DSPs digital signal processors
- DSPDs digital signal processing
- devices programmable logic devices
- FPGAs field programmable gate arrays
- processors controllers, microcontrollers, and microprocessors.
- the method according to the embodiments of the present invention may be implemented in the form of modules, procedures, or functions that perform the functions or operations described above.
- the software code may be stored in the memory units 1280 and 1290 and driven by the processors 1220 and 1230.
- the memory unit may be located inside or outside the processor, and various known numbers
- Embodiments of the present invention can be applied to various wireless access systems.
- various radio access systems include 3rd Generation Partnership Project (3GPP), 3GPP2 and / or IEEE 802.xx (Institute of Electrical and Electronic Engineers 802) systems.
- 3GPP 3rd Generation Partnership Project
- 3GPP2 3rd Generation Partnership Project2
- IEEE 802.xx Institute of Electrical and Electronic Engineers 802
- Embodiments of the present invention can be applied not only to the various radio access systems, but also to all technical fields that use the various radio access systems.
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Abstract
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KR1020147037005A KR20150054718A (ko) | 2012-07-12 | 2013-07-12 | 무선 접속 시스템에서 안테나 포트향 참조 신호 전송 방법 |
CN201380042911.4A CN104541460B (zh) | 2012-07-12 | 2013-07-12 | 在无线接入系统中向天线端口发送基准信号的方法 |
US14/414,064 US9520973B2 (en) | 2012-07-12 | 2013-07-12 | Method for transmitting reference signal to antenna port in wireless access system |
JP2015521555A JP6238981B2 (ja) | 2012-07-12 | 2013-07-12 | 無線接続システムにおいてアンテナポート向け参照信号送信方法 |
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US201261671087P | 2012-07-12 | 2012-07-12 | |
US61/671,087 | 2012-07-12 |
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Cited By (10)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
WO2015133812A1 (ko) * | 2014-03-04 | 2015-09-11 | 엘지전자 주식회사 | 다중 안테나 무선 통신 시스템에서 향상된 참조 신호 송신 방법 및 이를 위한 장치 |
WO2016045527A1 (zh) * | 2014-09-24 | 2016-03-31 | 上海朗帛通信技术有限公司 | 一种ue、基站中的3d mimo通信方法和设备 |
CN105490787A (zh) * | 2014-09-15 | 2016-04-13 | 中兴通讯股份有限公司 | 下行导频的发送方法、检测方法、装置及基站、终端 |
WO2016079694A1 (en) * | 2014-11-18 | 2016-05-26 | Telefonaktiebolaget L M Ericsson (Publ) | Signaling adapted csi-rs periodicities in active antenna systems |
CN105850210A (zh) * | 2014-01-28 | 2016-08-10 | 富士通株式会社 | 波束选择方法、装置和通信系统 |
WO2016182072A1 (ja) * | 2015-05-14 | 2016-11-17 | 株式会社Nttドコモ | 移動局、基地局及び無線通信方法 |
JP2017506453A (ja) * | 2014-01-28 | 2017-03-02 | 富士通株式会社 | 情報構成方法、情報構成装置及び通信システム |
US10404430B2 (en) | 2013-12-16 | 2019-09-03 | Huawei Technologies Co., Ltd. | Method for transmitting pilot signal, base station, and user equipment |
CN110402610A (zh) * | 2017-03-14 | 2019-11-01 | Lg 电子株式会社 | 无线通信系统中在终端和基站之间执行随机接入过程的方法和支持该方法的设备 |
JP2020005276A (ja) * | 2019-08-14 | 2020-01-09 | 富士通株式会社 | 情報構成方法、情報構成装置及び通信システム |
Families Citing this family (35)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
EP2837103B1 (en) * | 2012-04-12 | 2017-03-01 | Nokia Solutions and Networks Oy | Three-dimensional beamforming in a mobile communications network |
US9288698B2 (en) | 2012-11-02 | 2016-03-15 | Intel Corporation | Handling signal quality measurements in a wireless communication network |
US10193665B2 (en) * | 2013-03-21 | 2019-01-29 | Texas Instruments Incorporated | Reference signal for 3D MIMO in wireless communication systems |
US9680552B2 (en) * | 2013-04-16 | 2017-06-13 | Lg Electronics Inc. | Method and apparatus for reporting channel state information in wireless communication system |
US9271279B2 (en) * | 2013-05-09 | 2016-02-23 | Sharp Laboratories Of America, Inc. | Channel state measurement and reporting |
WO2016048087A1 (ko) * | 2014-09-25 | 2016-03-31 | 엘지전자 주식회사 | 다중 안테나 무선 통신 시스템에서 참조 신호 전송 방법 및 이를 위한 장치 |
US9621243B2 (en) | 2014-12-03 | 2017-04-11 | Texas Instruments Incorporated | Method and apparatus for CSI feedback in a MIMO wireless communication system with elevation beamforming |
CN106470065B (zh) * | 2015-08-14 | 2020-01-21 | 财团法人工业技术研究院 | 发射和接收信道状态信息参考信号的方法及其基站和设备 |
WO2017078798A1 (en) * | 2015-11-03 | 2017-05-11 | Intel Corporation | Antenna port multiplexing |
CN106685503B (zh) * | 2015-11-06 | 2022-07-15 | 中兴通讯股份有限公司 | 信道状态测量导频csi-rs的配置方法及装置 |
US10595322B2 (en) * | 2015-11-23 | 2020-03-17 | Qualcomm Incorporated | Beamforming and user equipment grouping |
JP6625747B2 (ja) | 2015-12-03 | 2019-12-25 | 華為技術有限公司Huawei Technologies Co.,Ltd. | 共通セルネットワークにおけるマルチアンテナ伝送方法、及び基地局 |
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US20170288933A1 (en) * | 2016-03-30 | 2017-10-05 | Intel IP Corporation | Wireless signal receiver |
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US20180054281A1 (en) * | 2016-08-19 | 2018-02-22 | Futurewei Technologies, Inc. | Method to transmit channel state information reference signals in large mimo systems |
US10638380B2 (en) | 2016-09-30 | 2020-04-28 | Telefonaktiebolaget Lm Ericsson (Publ) | Methods and devices for reference signal transmission and measurement |
CN108123741B (zh) * | 2016-11-30 | 2021-04-16 | 上海诺基亚贝尔股份有限公司 | 基于重叠子阵列(osa)的波束赋形方法和设备 |
WO2018098802A1 (en) * | 2016-12-02 | 2018-06-07 | Qualcomm Incorporated | Transmitting channel state information reference signals in new radio |
CN109617575B (zh) * | 2016-12-28 | 2020-06-30 | 上海朗帛通信技术有限公司 | 一种被用于多天线传输的ue、基站中的方法和装置 |
EP3944549B1 (en) | 2017-01-06 | 2022-12-07 | LG Electronics Inc. | Method for transmitting reference signal in wireless communication system and apparatus therefor |
KR102292994B1 (ko) * | 2017-03-23 | 2021-08-26 | 삼성전자 주식회사 | 무선 통신 시스템에서 타이밍 조정 방법 및 장치 |
CN108632838A (zh) * | 2017-03-24 | 2018-10-09 | 维沃移动通信有限公司 | 一种波束的测量上报方法、终端及网络侧设备 |
CN108923896B (zh) | 2017-04-19 | 2021-03-26 | 上海朗帛通信技术有限公司 | 一种被用于寻呼的用户设备、基站中的方法和装置 |
WO2018201284A1 (en) * | 2017-05-02 | 2018-11-08 | Qualcomm Incorporated | Port group indication and port subsets in a csi-rs resource for new radio (nr) |
JP7056017B2 (ja) | 2017-06-15 | 2022-04-19 | ソニーグループ株式会社 | 通信装置、通信方法、及びプログラム |
WO2019048934A1 (en) * | 2017-09-11 | 2019-03-14 | Lenovo (Singapore) Pte. Ltd. | REFERENCE SIGNALS FOR RADIO LINK MONITORING |
CN110138519A (zh) | 2018-02-02 | 2019-08-16 | 索尼公司 | 无线通信系统中的装置和方法、计算机可读存储介质 |
WO2020032864A1 (en) * | 2018-08-09 | 2020-02-13 | Telefonaktiebolaget Lm Ericsson (Publ) | Minimization of base station to base station interference in tdd networks |
CN114257283A (zh) * | 2018-09-21 | 2022-03-29 | 阿里斯卡尔股份有限公司 | 信道状态信息参考信号 |
US11831383B2 (en) | 2020-01-27 | 2023-11-28 | Qualcomm Incorporated | Beam failure recovery assistance in upper band millimeter wave wireless communications |
US11856570B2 (en) | 2020-01-27 | 2023-12-26 | Qualcomm Incorporated | Dynamic mixed mode beam correspondence in upper millimeter wave bands |
CN113950093A (zh) * | 2020-07-15 | 2022-01-18 | 大唐移动通信设备有限公司 | 一种csi测量上报方法、终端及网络侧设备 |
Citations (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US20110176634A1 (en) * | 2010-01-18 | 2011-07-21 | Pantech Co., Ltd. | Method and apparatus for allocating channel state information-reference signal in wireless communication system |
WO2011115421A2 (en) * | 2010-03-17 | 2011-09-22 | Lg Electronics Inc. | Method and apparatus for providing channel state information-reference signal (csi-rs) configuration information in a wireless communication system supporting multiple antennas |
WO2011145886A2 (ko) * | 2010-05-18 | 2011-11-24 | 엘지전자 주식회사 | 다중 분산 노드 시스템에서 채널 측정을 수행하기 위한 방법 및 장치 |
Family Cites Families (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CN101541085B (zh) * | 2009-04-27 | 2015-06-03 | 中兴通讯股份有限公司 | 一种测量参考信号的发送及使用方法 |
US20110244877A1 (en) * | 2009-10-08 | 2011-10-06 | Qualcomm Incorporated | Method and apparatus for using channel state information reference signal in wireless communication system |
EP2605433B1 (en) * | 2010-08-11 | 2019-02-27 | GoldPeak Innovations Inc. | Apparatus and method for transmitting muting information, and apparatus and method for acquiring channel state using same |
US9025574B2 (en) * | 2011-08-12 | 2015-05-05 | Blackberry Limited | Methods of channel state information feedback and transmission in coordinated multi-point wireless communications system |
US20130083681A1 (en) * | 2011-09-30 | 2013-04-04 | Research In Motion Limited | Methods of Channel State Information Feedback and Transmission in Coordinated Multi-Point Wireless Communications System |
-
2013
- 2013-07-12 KR KR1020147037005A patent/KR20150054718A/ko not_active Application Discontinuation
- 2013-07-12 WO PCT/KR2013/006275 patent/WO2014010994A1/ko active Application Filing
- 2013-07-12 JP JP2015521555A patent/JP6238981B2/ja not_active Expired - Fee Related
- 2013-07-12 US US14/414,064 patent/US9520973B2/en not_active Expired - Fee Related
- 2013-07-12 CN CN201380042911.4A patent/CN104541460B/zh not_active Expired - Fee Related
Patent Citations (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US20110176634A1 (en) * | 2010-01-18 | 2011-07-21 | Pantech Co., Ltd. | Method and apparatus for allocating channel state information-reference signal in wireless communication system |
WO2011115421A2 (en) * | 2010-03-17 | 2011-09-22 | Lg Electronics Inc. | Method and apparatus for providing channel state information-reference signal (csi-rs) configuration information in a wireless communication system supporting multiple antennas |
WO2011145886A2 (ko) * | 2010-05-18 | 2011-11-24 | 엘지전자 주식회사 | 다중 분산 노드 시스템에서 채널 측정을 수행하기 위한 방법 및 장치 |
Non-Patent Citations (2)
Title |
---|
ALCATEL-LUCENT SHANGHAI BELL ET AL.: "Considerations on CSI feedback enhancements for high-priority antenna configurations", RL-112420, 3GPP TSG-RAN WG1 #66, 22 August 2011 (2011-08-22), ATHENS, GREECE, Retrieved from the Internet <URL:http://www.3gpp.org/ftp/tsgran/wglrll/TSGRl66/Docs> * |
SAMSUNG: "Prioritization of CSI feedback enhancement scenarios for DL-MIMO", RL-112515, 3GPP TSG RAN WG1 MEETING #66, 22 August 2011 (2011-08-22), ATHENS, GREECE, Retrieved from the Internet <URL:http://www.3gpp.org/ftp/tsgran/wglrll/TSGRl66/Docs> * |
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---|---|---|---|---|
US10404430B2 (en) | 2013-12-16 | 2019-09-03 | Huawei Technologies Co., Ltd. | Method for transmitting pilot signal, base station, and user equipment |
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US11477657B2 (en) | 2014-01-28 | 2022-10-18 | Fujitsu Limited | Information configuration method, information configuration apparatus and communication system |
CN111342871A (zh) * | 2014-01-28 | 2020-06-26 | 富士通互联科技有限公司 | 基站设备、用户设备和通信系统 |
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US10638334B2 (en) | 2014-01-28 | 2020-04-28 | Fujitsu Connected Technologies Limited | Beam selection method and apparatus and communication system |
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US10567968B2 (en) | 2014-01-28 | 2020-02-18 | Fujitsu Limited | Information configuration method, information configuration apparatus and communication system |
US10020920B2 (en) | 2014-03-04 | 2018-07-10 | Lg Electronics Inc. | Method for transmitting enhanced reference signal in multi-antenna wireless communication system and apparatus therefor |
WO2015133812A1 (ko) * | 2014-03-04 | 2015-09-11 | 엘지전자 주식회사 | 다중 안테나 무선 통신 시스템에서 향상된 참조 신호 송신 방법 및 이를 위한 장치 |
US10673586B2 (en) | 2014-09-15 | 2020-06-02 | Xi'an Zhongxing New Software Co., Ltd. | Downlink pilot transmitting method and device, detection method and device, evolved node B and terminal |
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US9999073B2 (en) | 2014-11-18 | 2018-06-12 | Telefonaktiebolaget Lm Ericsson (Publ) | Signaling adapted CSI-RS periodicities in active antenna systems |
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US10313911B2 (en) | 2015-05-14 | 2019-06-04 | Ntt Docomo, Inc. | Mobile station, base station and radio communication method |
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Also Published As
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US20150180628A1 (en) | 2015-06-25 |
CN104541460B (zh) | 2018-10-12 |
JP6238981B2 (ja) | 2017-11-29 |
JP2015523814A (ja) | 2015-08-13 |
KR20150054718A (ko) | 2015-05-20 |
US9520973B2 (en) | 2016-12-13 |
CN104541460A (zh) | 2015-04-22 |
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