WO2011034400A2 - 무선 통신 시스템에서 사운딩 참조 신호 송신 방법 및 이를 위한 장치 - Google Patents
무선 통신 시스템에서 사운딩 참조 신호 송신 방법 및 이를 위한 장치 Download PDFInfo
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- WO2011034400A2 WO2011034400A2 PCT/KR2010/006475 KR2010006475W WO2011034400A2 WO 2011034400 A2 WO2011034400 A2 WO 2011034400A2 KR 2010006475 W KR2010006475 W KR 2010006475W WO 2011034400 A2 WO2011034400 A2 WO 2011034400A2
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- reference signal
- sounding reference
- downlink
- aperiodic sounding
- 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
- 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
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L5/00—Arrangements affording multiple use of the transmission path
- H04L5/14—Two-way operation using the same type of signal, i.e. duplex
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L5/00—Arrangements affording multiple use of the transmission path
- H04L5/14—Two-way operation using the same type of signal, i.e. duplex
- H04L5/1469—Two-way operation using the same type of signal, i.e. duplex using time-sharing
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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
- H04L5/22—Arrangements affording multiple use of the transmission path using time-division multiplexing
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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
- H04W76/00—Connection management
- H04W76/20—Manipulation of established connections
- H04W76/27—Transitions between radio resource control [RRC] states
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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
Definitions
- the present invention relates to a wireless communication system. More specifically, the present invention relates to a method for transmitting aperiodic sounding reference signal to a base station in a wireless communication system, and an apparatus therefor.
- LTE 3rd Generation Partnership Project Long Term Evolution
- E-UMTS Evolved Universal Mobile Telecommunications System
- UMTS Universal Mobile Telecommunications System
- LTE Long Term Evolution
- an E-UMTS is connected to an external network in an end of a user equipment (UE) 120, a base station (eNode B) eN B (110a ⁇ 110b), and a network (E-UTRAN). And an Access Gateway (AG).
- a base station can transmit multiple data streams simultaneously by using broadcast service, multicast service, and / or unicast service.
- the cell is set to one of bandwidths such as 1.25, 2.5, 5, 10, 15, and 20 MHz to provide a downlink or uplink transmission service to multiple terminals. Different cells may be configured to provide different bandwidths.
- the base station controls data transmission and reception for a plurality of terminals.
- For downlink (DL) data the base station transmits downlink scheduling information so that the time / frequency region, coded code data size, and hybrid automatic retransmission request for data are transmitted to the corresponding UE.
- HARQ hybrid automatic retransmission request for data
- the base station transmits the uplink scheduling information to the terminal for uplink (UL) data, so that the information on the time / frequency domain, encoding, data size, and hybrid automatic retransmission request information available to the terminal can be obtained.
- UL uplink
- An interface for transmitting user traffic or control traffic may be used between base stations.
- the core network (CN) may be composed of an AG and a network node for user registration of the terminal.
- the AG manages the mobility of the UE in units of a track ⁇ ing area (TA) including a plurality of cells.
- Wireless communication technology has been developed up to LTE based on WCDMA, but users and operators Needs and expectations continue to increase.
- new technological advances are required to compete in the future. Reduced cost per bit, increased service availability, the use of flexible frequency subtraction, simple structure and open interface, and adequate power consumption of the terminal are required.
- LTE-Advanced LTE-Advanced
- LTE-A LTE-Advanced
- One of the major differences between LTE and LTE-A systems is the difference in system bandwidth.
- LTE-A system is aimed to support the broadband joedae 100 MHz, using a plurality of frequency blocks for this purpose to achieve a broadband h ( ⁇ is to use the transport E i "aggregation (carrier aggregation or bandwidth aggregation) technology
- carrier aggregation uses a plurality of frequency blocks as one large logical frequency band, and the bandwidth of each frequency block depends on the bandwidth of the system block used in the LTE system.
- Each frequency block is transmitted using a component carrier.
- An object of the present invention is to provide a method for transmitting aperiodic sounding reference signal to a base station in a wireless communication system and a device for the same.
- a method for transmitting aperiodic sounding reference signals by a terminal includes: receiving a downlink control channel from a base station; Decoding downlink downlink control information (DCI) old included in the downlink control channel; Confirming a transmission indication of an aperiodic sounding reference signal in the downlink DCI format; And transmitting the aperiodic sounding reference signal to the base station according to the transmission instruction.
- DCI downlink downlink control information
- the aperiodic sounding reference signal is transmitted in an n + kth subframe (where k ⁇ 4).
- the method may further include receiving a transmission parameter of the aperiodic sounding reference signal through an upper layer.
- the downlink DCI forbidden It may be configured to include information on the transmission parameter of the aperiodic sounding reference signal, wherein the downlink DCI format is characterized in that the DCI port for multi-antenna transmission and reception.
- Another aspect of the present invention is a terminal device comprising: receiving modules for receiving a downlink control channel from a base station; A processor for decoding a downlink downlink control information (DCI) format included in the downlink control channel and confirming an indication of aperiodic sounding reference signal in the downlink DCI port; And the [[ara, aperiodic sounding reference signal to the transmission indicated by the Features, including transmission mode for transmitting to the base station.
- DCI downlink downlink control information
- the aperiodic sounding reference signal is transmitted in an n + kth subframe (where k ⁇ 4).
- the receiving mothers may be configured to receive the transmission parameters of the aperiodic sounding reference signal through an upper layer.
- the downlink DCI format may include information about a transmission parameter of the aperiodic sounding reference signal, wherein the downlink DCI format is a DCI format for multiple antenna transmission and reception.
- the terminal may effectively transmit the aperiodic sounding reference signal to the base station in the wireless communication system.
- FIG. 1 is a diagram schematically illustrating an E-UMTS network structure as an example of a mobile communication system
- FIG. 2 is a radio interface protocol between a UE and an E-UTRAN based on a 3GPP radio access network standard. Drawing showing a control plane and a user plane structure of
- 3 is a view for explaining a physical channel used in the 3GPP system and a general signal transmission method using the same;
- FIG. 4 is a diagram illustrating a radio frame arbitrary structure used in the LTE system
- FIG. 5 illustrates a structural tool of an uplink subframe used in an LTE system.
- FIG. 6 illustrates a block configuration diagram of a communication transceiver according to an embodiment of the present invention.
- a system in which the system band uses a single frequency block is referred to as a legacy system or a narrowband system.
- the system A system that includes a plurality of frequency blocks and uses at least one frequency block as a legacy system I system block is referred to as an evolved system or a wideband system.
- the frequency block used as the legacy system block has the same size as the system block of the legacy system.
- the size of the remaining frequency blocks is not particularly limited. However, for system simplification, the size of the remaining frequency blocks may also be determined based on the system block size of the legacy system.
- the 3GPP LTE system [ ⁇ 3GPP LTE-A system is the Legacy
- the 3GPP LTE system is referred to herein as an LTE system or a legacy system.
- the terminal supporting the LTE system is called as an LTE terminal or a legacy terminal.
- the 3GPP LTE-A system is called as an LTE-A system or an encrypted system.
- the terminal supporting the LTE-A system is called as an LTE-A terminal or an evolved terminal.
- this specification describes an embodiment of the present invention using an LTE system 3 ⁇ 4 LTE-A system, but this is by way of example an embodiment of the present invention can be applied to any communication system corresponding to the above definition.
- the present specification describes a first embodiment of the present invention based on the FDD method, which is an embodiment of the present invention can be easily modified and applied to the H-FDD method or the TDD method.
- FIG. 2 is a control plane of a radio interface protocol between a terminal and an E-UTRAN based on a 3GPP radio access network standard, and FIG. This figure shows the structure of the user plane.
- the control plane refers to a path through which control messages used by a user equipment (UE) and a network to manage a call are transmitted.
- the user plane refers to a path through which data generated at the application layer is transmitted, for example, voice data or Internet packet data.
- the physical layer which is the first layer, provides an information transfer service to a higher layer by using a physical channel.
- the physical layer is connected to the upper medium access control layer through a transport channel. Data is moved between the medium access control layer and the physical layer through the transport channel. Data moves between the physical axis on the transmitting axis and the physical layer on the receiving side.
- the physical channel utilizes time and frequency as radio resources. Specifically, the physical channel is modulated in the Orthogonal Frequency Division Multiple Access (OFD) scheme in the downlink, and modulated in the Single Carrier Frequency Division Multiple Access (SC-FDMA) scheme in the uplink.
- OFD Orthogonal Frequency Division Multiple Access
- SC-FDMA Single Carrier Frequency Division Multiple Access
- the Medium Access Control (MAC) layer of the second layer provides services to a radio link control (RLC) layer, which is a higher layer, through a logical channel.
- RLC radio link control
- the RLC layer of the second layer supports reliable data transmission.
- the function of the RLC layer may be implemented as a functional block inside the MAC.
- the Packet Data Convergence Protocol (PDCP) layer of the second layer provides unnecessary control for efficiently transmitting IP packets such as IPv4 or IPv6 over a narrow bandwidth air interface. Header Compression Reduces Information Perform the function.
- PDCP Packet Data Convergence Protocol
- the Radio Resource Control (RRC) layer located at the bottom of the third layer is defined only in the control plane.
- the R C layer is responsible for the control of logical channels, transmission channels, and physical channels in connection with configuration, reconfiguration, and release of radio bearers.
- the radio bearer refers to a service provided by the second layer for data transmission between the terminal and the network.
- the RRC layers of the UE and the network exchange RRC messages with each other. If there is an RRC connection (RRC Connected) between the UE and the RC layer of the network, the UE is in an RRC connected mode, otherwise it is in an RRC idle mode.
- the non-access stratum (NAS) layer above the RRC layer performs functions such as session management and mobility management.
- One shell constituting the base station is set to one of the bandwidth, such as 1.25, 2.5, 5, 10, 15, 20Mhz to provide a downlink or uplink transmission service to multiple terminals. Different shells can be set to provide different bandwidths.
- the downlink transmission channel transmitting data from the network to the terminal transmits system information.
- BCH Broadcast Channel
- PCH Paging Channel
- SCH Downlink Shared Channel
- the downlink SCH may be transmitted. Or, it may be transmitted through a separate downlink multicast channel (MCH).
- MCH downlink multicast channel
- an uplink transmission channel for transmitting data from a terminal to a network includes a random access channel (ACH) for transmitting an initial control message, and an uplink shared channel (SCH) for transmitting user traffic or a control message.
- ACH random access channel
- SCH uplink shared channel
- the logical channel that is located above the transmission channel and is mapped to the transmission channel includes a broadcast control channel (BCCH), a paging control channel (PCCH), a common control channel (CCCH), and a multicast control channel (MCCH). And MTCH (Multicast Traffic Channel).
- BCCH broadcast control channel
- PCCH paging control channel
- CCCH common control channel
- MCCH multicast control channel
- MTCH Multicast Traffic Channel
- 3 is a diagram illustrating a common channel and a general signal transmission method using them in the 3GPP system.
- the terminal When the terminal is powered on or newly enters the cell, the terminal performs an initial shell search operation such as synchronizing with the base station (S301). To this end, the UE receives a Primary Synchronization Channel (P-SCH) and a Secondary Synchronization Channel (S-SCH) from the base station, synchronizes with the base station, and receives information such as a cell ID. Can be obtained. Thereafter, the terminal may receive a physical broadcast channel from the base station to obtain broadcast information in a cell. Meanwhile, the terminal may check a downlink channel state by receiving a downlink reference signal (DL RS) in an initial cell search step.
- P-SCH Primary Synchronization Channel
- S-SCH Secondary Synchronization Channel
- the terminal may receive a physical broadcast channel from the base station to obtain broadcast information in a cell. Meanwhile, the terminal may check a downlink channel state by receiving a downlink reference signal (DL RS) in an initial cell search step.
- DL RS downlink reference signal
- the UE After completing the initial cell lookup, the UE has a physical downlink control channel.
- Channel More specific system information can be obtained by receiving a physical downlink control channel (PDSCH) according to the PDCCH) and the information on the PDCCH (S302).
- PDSCH physical downlink control channel
- the terminal may perform a random access procedure (RACH) for the base station (steps S303 to S306).
- RACH Random Access Channel
- the UE physical imeu I connecting material board Physical Random Access Channel; PRACH
- PRACH Physical Random Access Channel
- S303 and S305 response to a PDCCH and a corresponding preamble through the PDSCH, which, via An answer message can be received (S304 and S306).
- PRACH Physical Random Access Channel
- an additional Contention Resolution Procedure may be performed.
- the UE which has performed the above-described procedure, then receives the PDCCH / PDSCH as a general uplink / downlink signal transmission procedure (S307) 3 ⁇ 4 Physical Uplink Shared Channel (PUSCH) / physical uplink control support!
- a null Uplink Control Channel (PUCCH) transmission (S308) may be performed.
- the control information transmitted by the terminal to the base station through the uplink or received by the terminal from the base station includes a downlink / uplink ACK / NACK signal, a channel quality indicator (CQI), a precoding matrix index (PMI), a rank indicator (I), and the like. It includes.
- the terminal may transmit the above-described control information such as CQI / PMI / RI through PUSCH 3 ⁇ 4 / or PUCCH.
- 4 is a diagram illustrating a radio frame structure used in the LTE system.
- the radio frame is 10 ms (327200 s) °
- It has a length and consists of 10 equally sized subframes.
- Each subframe has a length of lms and consists of two slots.
- Each chute has an I length of 0.5 ms (15360-Ts).
- the slot includes a plurality of OFDM symbol or black SC-FDMA symbols in the time domain and a plurality of resource blocks in the frequency domain.
- one resource block includes 12 subcarriers x7 (6) OFDM symbols or SC-FDMA symbols.
- the transmission time interval (TTI) which is the unit time at which data is transmitted, is one or more
- the structure of the above-described radio frame is merely an example, and the number of subframes included in the radio frame or the number of slots included in the subframe and the number of OFDM deep or black SC-FDMA heart lights included in the slot may vary. Can be.
- Subframe 500 is a diagram illustrating a structure of an uplink subframe used in an LTE system. 5, the length of 1ms which is a basic unit of LTE uplink transmission
- Subframe 500 consists of two 0.5 ms slots 501. Normal Cyclic Prefix (CP)
- Each slot to assume the length is composed of seven symbols 502 and one symbol corresponds to one SC-FDMA symbol.
- Resource block 503 includes 12 subcarriers in the frequency domain, and A resource allocation unit corresponding to one slot in the time domain.
- the structure of the LTE I uplink subframe is largely divided into a data region 504 and a control region 505.
- the data area means a series of communication resources used for transmitting data such as voice and packet transmitted to each terminal, and corresponds to the remaining resources except the control area in the subframe.
- the control region refers to a series of communication resources used for transmitting downlink channel quality reports from each terminal, receiving ACK / NACK for downlink signals, and uplink scheduling requests.
- a region 506 in which a sounding reference signal can be transmitted in one subframe is an interval in which the last SC-FDMA symbol is located on the time axis in one subframe.
- the frequency is transmitted through the data transmission band. Sounding reference signals of multiple terminals transmitted in the last SC-FDMA of the same subframe may be distinguished according to frequency positions.
- the sounding reference signal is composed of a constant amplitude zero auto correlation (CAZAC) sequence, and the sounding reference signals transmitted from various terminals are CAZACs having different cyclic shift values ( «) according to Equation 1 below. Is the sequence J "' ⁇ .
- CAZAC constant amplitude zero auto correlation
- RS is a value set for each terminal by a higher layer, and is between 0 and 7. It has an integer value ⁇ [[ so that the cyclic shift value can have 8 values depending on.
- Each CAZAC sequence generated through a cyclic shift from one CAZAC sequence is self! " There is a characteristic of having zero-correlation with sequences having different cyclic shift values. Using this characteristic, sounding reference signals in the same frequency domain may be distinguished according to CAZAC sequence cyclic shift values.
- the sounding reference signal of each terminal is allocated on a frequency according to a parameter set by the base station The terminal performs frequency hopping of the sounding reference signal to transmit the sounding reference signal on the premise of uplink data transmission bandwidth.
- the sounding reference signal sequence / 'SRS (") is first multiplied by the amplitude scaling factor / 3 ⁇ 4 RS to satisfy the transmit power of the terminal, and then a resource element (RE) having an index of (/ ( , /). From OH r SRS (0) is mapped by Equation 2 below.
- Equation 4 I uplink pilot time slot (UpPTS) is defined as Equation 5 below.
- Equation 4> k 0 ' (N ⁇ / 2 m SRS'O 2 SC + k TC
- Equation 4 and Equation 5 k C is a transmission comb parameter signaled to the UE through an upper layer, and has a value of 0 or 1. Also, up to 3 ⁇ 4 half frame I. 0 in the link file 3 ⁇ 4 time slot and 0 in the uplink file 3 ⁇ 4 time slot of the second half frame, where M ⁇ , is the length, i.e. bandwidth, of the sounding reference signal sequence expressed over a subcarrier defined by Equation 6 below. to be.
- Equation 6 "1 ⁇ 2 ⁇ is a value signaled from the base station according to the uplink bandwidth ⁇ as shown in Tables 1 to 4 below.
- M A cell-specific parameter ( ⁇ ) which is an integer value of 0 to 7 to obtain SRS3 ⁇ 4 .
- ⁇ SRS the terminal specific parameter ⁇ SRS, which is an integer value of 0 to 3.
- K P 0 2,3 3 ⁇ 4 40 ⁇ N ⁇ B L ⁇ 60.
- the terminal may perform frequency hopping of the sounding reference signal to transmit the sounding reference signal on the premise of uplink data transmission bandwidth.
- the jump is set by a parameter ⁇ with a value of 0-3 given from the upper layer.
- Equation 7 When the frequency hopping of the sounding reference signal is deactivated, if P ⁇ B SRs, the frequency position index has a constant value as shown in Equation 7 below. Where ⁇ 1 ⁇ 21 is the top Parameters given in the hierarchy. ⁇ Equation 7> Meanwhile, when the frequency hopping of the sounding reference signal is activated, that is, when b hop ⁇ B SRS ⁇ , the frequency position index ⁇ 7 is defined by Equations 8 and 9 below. ⁇ Equation 8>
- n SRS is a parameter for calculating the number of times the sounding reference signal is transmitted and is expressed by Equation 10. ⁇ Equation 10> for 2ms SRS periodicity of TDD frame structure
- Equation 10 ⁇ SRS is the period of the sounding reference signal, and T offset is the sounding reference signal. Inquire about the subframe offset.
- 3 ⁇ 4 is subjectreut number, "/ is 3 ⁇ 4 if the frame number eu terminal specific sound period of coding the reference signal O subframe offset T offiet ⁇ terminal set specific sounding reference signal for setting index ( ⁇ ) is FDD and TDD In accordance with, respectively, as shown in the following 5 and Table 6.
- Table 5 shows the case of FDD
- Table 6 shows the case of TDD.
- the terminal receives the parameter from the base station in RRC signaling, and transmits a periodic sounding reference signal. Unlike this, the base station instructs the terminal to transmit the aperiodic sounding reference signal, and the terminal transmits the aperiodic sounding reference signal to the base station according to the indication.
- the additionally transmitted aperiodic sounding reference signal is one time. Or, it can be set to be transmitted only a limited number of times, or can be set to be transmitted with a kind of period.
- the control signal for one time or a limited number of times may be transmitted through RRC signaling
- black may be transmitted through L1 control signaling
- black may be further defined for additional signaling by pre-defined between the terminal and the base station. It can also be set to block the head.
- the symbol to which the added sounding reference signal is transmitted can be set so that the existing periodic sounding reference coral is allocated to the same subframe as the allocated subframe. It can also be set to be assigned to another subframe.
- setting to assign to another subframe means that, when the UE-specific sounding reference signal period defined in the conventional LTE system is 1 ms, the UE transmits a transmission interval of symbols allocated to the aperiodic sounding reference signal. This is a method of setting a subset of a specific sounding reference signal period, that is, 2 ms, 4 ms, 5 ms, 10 ms, 20 ms, etc., which are multiples of the period.
- a subframe in which a sounding reference signal is periodically transmitted has a cell specific configuration. If the symbol for the non-periodic sounding reference signal additionally transmitted as described above is configured to be allocated to the same subframe as the subframe allocated specifically for the existing periodic sounding reference signal, the additionally transmitted A sounding reference signal may also have the same setting as that of the cell specific setting, and black is a sounding reference in which an I subframe is additionally transmitted in the form of an I subset in which a sounding reference signal is periodically transmitted. Can be allocated for the signal.
- the additional sounding reference signal indicated by the L1 / L2 control signal ring is reserved for transmitting the existing periodic sounding reference signal in a subframe in which the existing periodic sounding reference signal can be transmitted.
- Other symbols black that are reserved for transmission may transmit on symbols reserved for the transmission of the uplink DM-RS.
- transmission can be made only in a cell-specific subframe preset for transmitting the existing sounding reference signal, and PUSCH punctures only in the preset cell-specific subframe. By performing puncturing, loss of uplink data throughput can be minimized.
- the parameters of the aperiodic sounding reference signal may include resources used for transmitting the existing periodic sounding reference signal, for example, cell-specific sounding reference signal bandwidth setting, terminal-specific sounding reference signal bandwidth setting, frequency start position, and transmission com parameter. It can be used as it is.
- the parameters of the aperiodic sounding reference signal are resources used for transmitting additional sounding reference signals as RRC control signals, for example, cell-specific sounding reference signals, in the same manner as those used in the conventional periodic sounding reference signal transmission.
- the additional sounding reference signal can be transmitted by using the bandwidth, the UE-specific sounding reference signal bandwidth, the frequency start signal, and the transmission com parameter.
- Or can be transmitted by using an aperiodic sounding cell-specific with respect to the guiding reference signals a sounding reference signal bandwidth configuration, UE-specific ⁇ 1 "bounding reference signal bandwidth settings and the former available for ⁇ in the system bandwidth, regardless of band setting For example, 24RB when the system bandwidth is 5MH, A sounding reference signal can occupy 48 RB at 10 MHz, 72 RB at 15 MHz, and 96 RB at 20 MHz.
- the time resource for transmitting the aperiodic sounding reference signal may be transmitted according to a configuration included in downlink control information (DCI) or transmitted in a subframe having a specific relationship thereto.
- DCI downlink control information
- a specific method of signaling transmission of an aperiodic sounding reference signal will be described.
- a method of signaling a transmission indication of an aperiodic sounding reference signal to an uplink DCI port may be considered. That is, when the base station signals an aperiodic sounding reference signal transmission indication from the nth subframe to the uplink DCI format, the UE decodes the received uplink DCI format and then n + kth subframe (k>). In 4), an aperiodic human 1-round reference signal can be transmitted to the base station. .
- a method of signaling a transmission instruction of an aperiodic sounding reference signal in a downlink DCI format is more preferable.
- the terminal can more effectively respond to a sounding request from the base station.
- the base station simply triggers / releases the aperiodic sounding reference signal in the downlink DCI format or indicates only active / inactive signaling, the amount of signaling information is not large.
- unused information bits or black bits or a combination of specific code points available in the corresponding downlink DCI format may be utilized.
- the aforementioned parameters of the sounding reference signal may be considered to be signaled in advance through an upper layer, that is, an RC layer.
- the aperiodic sounding reference signal does not satisfy the backward compatibility with LTE. Therefore, the aperiodic sounding reference signal cannot be used in the LTE system, that is, Rel-8 / 9. Since the DD reference signal can be used, a method of using the downlink DCI format that is newly defined in the LTE-A system may be considered. For example, for an 8x8 MIMO system that is newly defined in the Rel-10. A method using the downlink DCI format may be considered.
- Unused information bits in the format may utilize a combination of bits or specific code points that can be utilized in the corresponding downlink DCI format.
- all parameters for the terminal specific sounding reference signal of the sounding reference signal described above, black is a subset of the parameter among the terminal specific parameters, for example, cyclic Cyclic Shift (CS), Transmission comb, and bandwidth of UE-specific sounding reference signals are dynamically signaled using the downlink DCI port, and the remaining UE-specific parameters and the above-described sounding are performed.
- Cell specific parameters of the reference signal may be considered to be signaled in advance through a higher layer, that is, an RRC layer.
- a method used in the downlink DCI port newly defined in the LTE-A system may be considered.
- a method of using a downlink DCI format for an 8x8 IMO system newly defined in Rel-10 may be considered.
- it may be considered to use a newly defined downlink DCI format in the LTE-A system, for example, a downlink DCI format for an 8 * 8 MIMO system.
- the transceiver may be part of a base station or a terminal.
- the transceiver 600 includes a processor 610, a memory 620, an RF module 630, display modules 640, and a user interface module 650.
- the transceiver 600 is illustrated for convenience of explanation and some modules may be omitted. In addition, the transceiver 600 may further include the necessary modules. In addition, some of the hairs in the transceiver 600 may be divided into more granular hairs.
- the processor 610 is configured to perform an operation according to the embodiment of the present invention illustrated with reference to the drawings.
- the processor 610 when the transceiver 600 is part of a base station, the processor 610 sends a control signal. It can generate and map to a control channel set in a plurality of frequency blocks. In addition, when the transceiver 600 is part of a terminal, the processor 610 may identify a control channel directed to it from the signals received from the plurality of frequency blocks and extract a control signal therefrom.
- the processor 610 may perform a necessary operation based on the control signal. Detailed operations of the processor 610 may refer to the contents described with reference to FIGS. 1 to 5.
- the memory 620 is connected to the processor 610 and stores an operating system, an application, a program code, data, and the like.
- the RF module 630 is connected to the processor 610 and performs a function of converting a baseband signal into a radio signal * or converting a radio signal into a baseband signal. In this regard, the RF modules 630 perform analog conversion, amplification, filtering and frequency up-conversion or their reverse processes.
- Display modules 640 are connected to the processor 610 and display various information. The display modules 640 are not limited thereto but may use well-known elements such as a liquid crystal display (LCD), a light emitting diode (LED), and an organic light emitting diode (OLED).
- the user interface models 650 are connected to the processor 610 and can be configured with a combination of well known user interfaces such as a keypad, touch screen, and the like.
- the embodiments of the present invention have been mainly described based on data transmission / reception relations between the terminal and the base station.
- Certain operations described in this document as being performed by a base station may, in some cases, be performed by an upper node thereof. That is, it is apparent that various operations performed for communication with the terminal in a network including a plurality of network nodes including a base station may be performed by the base station or other network nodes other than the base station.
- a base station may be substituted by terms such as a fixed station, a Node B, an eNode B (eNB), an access point, and the like.
- the terminal may be substituted by terms such as a user equipment (UE), a mobile station (MS), and a mobile subscriber station (MSS).
- UE user equipment
- MS mobile station
- MSS mobile subscriber station
- Implementations in accordance with the present invention may be implemented by various means, for example, hardware, firmware, software, or a combination thereof.
- an embodiment of the present invention provides one or more application specific integrated circuits (ASICs), digital signal processors (DSPs), digital signal processing devices (DSPDs), and programmable (PLDs) logic devices), 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.
- one embodiment of the present invention may be implemented in the form of modules, procedures, functions, etc. that perform the functions or operations described above.
- the software code may be stored in a memory unit and driven by a processor.
- the memory unit may exchange data with the processor by various means which are already known to be located inside or outside the processor.
- the present invention can be applied to a wireless communication system. More specifically, the present invention may be applied to a method and apparatus for transmitting a sounding reference signal in a wireless communication system to which frequency aggregation is applied.
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Abstract
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CN201080047494.9A CN102577522B (zh) | 2009-09-21 | 2010-09-20 | 在无线通信系统中发送探测参考信号的方法和装置 |
KR1020127006629A KR101319903B1 (ko) | 2009-09-21 | 2010-09-20 | 무선 통신 시스템에서 사운딩 참조 신호 송신 방법 및 이를 위한 장치 |
JP2012529693A JP5868322B2 (ja) | 2009-09-21 | 2010-09-20 | 無線通信システムにおいてサウンディング参照信号の転送方法及びそのための装置 |
US13/497,293 US8948088B2 (en) | 2009-09-21 | 2010-09-20 | Method for transmitting a sounding reference signal in a wireless communication system, and apparatus for same |
CA2774806A CA2774806C (en) | 2009-09-21 | 2010-09-20 | Method for transmitting a sounding reference signal in a wireless communication system, and apparatus for same |
AU2010296186A AU2010296186B2 (en) | 2009-09-21 | 2010-09-20 | Method for transmitting a sounding reference signal in a wireless communication system, and apparatus for same |
EP10817469.9A EP2482591B1 (en) | 2009-09-21 | 2010-09-20 | Method for transmitting a sounding reference signal in a wireless communication system, and apparatus for same |
US14/567,909 US9236989B2 (en) | 2009-09-21 | 2014-12-11 | Method for transmitting a sounding reference signal in a wireless communication system, and apparatus for same |
US14/960,064 US9935752B2 (en) | 2009-09-21 | 2015-12-04 | Method for transmitting a sounding reference signal in a wireless communication system, and apparatus for same |
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US14/567,909 Continuation US9236989B2 (en) | 2009-09-21 | 2014-12-11 | Method for transmitting a sounding reference signal in a wireless communication system, and apparatus for same |
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WO2013024983A3 (ko) * | 2011-08-12 | 2013-04-11 | 주식회사 팬택 | 사운딩 참조신호 전송 방법과 장치, 및 그를 위한 사운딩 참조신호 전송 지시 방법과 장치 |
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US8948088B2 (en) | 2015-02-03 |
EP2482591A4 (en) | 2013-03-13 |
AU2010296186A1 (en) | 2012-04-19 |
KR20120049917A (ko) | 2012-05-17 |
CA2774806C (en) | 2015-05-19 |
US9935752B2 (en) | 2018-04-03 |
JP2013505630A (ja) | 2013-02-14 |
KR101319903B1 (ko) | 2013-10-18 |
EP2482591B1 (en) | 2018-08-15 |
JP5868322B2 (ja) | 2016-02-24 |
AU2010296186B2 (en) | 2014-07-17 |
US20160087771A1 (en) | 2016-03-24 |
CA2774806A1 (en) | 2011-03-24 |
CN102577522A (zh) | 2012-07-11 |
US20150092635A1 (en) | 2015-04-02 |
EP2482591A2 (en) | 2012-08-01 |
US20120281625A1 (en) | 2012-11-08 |
US9236989B2 (en) | 2016-01-12 |
CN102577522B (zh) | 2015-12-09 |
WO2011034400A3 (ko) | 2011-08-04 |
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