WO2013012212A1 - 채널 상태 보고 방법 및 장치 - Google Patents
채널 상태 보고 방법 및 장치 Download PDFInfo
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- WO2013012212A1 WO2013012212A1 PCT/KR2012/005576 KR2012005576W WO2013012212A1 WO 2013012212 A1 WO2013012212 A1 WO 2013012212A1 KR 2012005576 W KR2012005576 W KR 2012005576W WO 2013012212 A1 WO2013012212 A1 WO 2013012212A1
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- dci
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04J—MULTIPLEX COMMUNICATION
- H04J11/00—Orthogonal multiplex systems, e.g. using WALSH codes
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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
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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
- H04L5/0057—Physical resource allocation for CQI
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W24/00—Supervisory, monitoring or testing arrangements
- H04W24/10—Scheduling measurement reports ; Arrangements for measurement reports
Definitions
- the present invention relates to wireless communications, and more particularly, to a method and apparatus for reporting channel status in a wireless communications system.
- LTE Long term evolution
- 3GPP 3rd Generation Partnership Project
- TS Technical Specification
- Next-generation wireless communication systems are considering providing services for low- and low-end devices that focus on data communication, such as meter reading, water level measurement, surveillance camera use, and vending machine inventory reporting.
- MTC machine-type communication
- MTC refers to a concept in which a mechanical device, not a terminal used by humans, communicates using an existing wireless communication network.
- the mechanical device used for the MTC is called an MTC device or an M2M device.
- the MTC device transmits a small amount of traffic at a time, but may increase the number of MTC devices operating simultaneously. Therefore, if the dynamic scheduling and control information exchange is performed for each MTC device, the signaling burden may be very large.
- An object of the present invention is to provide a channel state reporting method and apparatus.
- a channel state reporting method in a wireless communication system includes a method in which a wireless device monitors a physical downlink control channel (PDCCH) for downlink control information (DCI) including a channel quality indicator (CQI) request for a plurality of wireless devices. step; And if the CQI report is triggered by the CQI request, reporting the CQI to the base station by the wireless device.
- PDCCH physical downlink control channel
- CQI channel quality indicator
- G-RNTI Group-Radio Network Temporary Identifiers
- CRC cyclic redundancy check
- a wireless device reporting a channel state in a wireless communication system includes a radio frequency unit (RF) unit for transmitting and receiving a radio signal, and a processor connected to the RF unit, wherein the processor is connected to a plurality of wireless devices. It monitors a physical downlink control channel (PDCCH) for downlink control information (DCI) including a channel quality indicator (CQI) request and reports a CQI to a base station when the CQI report is triggered by the CQI request.
- RF radio frequency unit
- DCI downlink control information
- CQI channel quality indicator
- a base station for receiving a channel state in a wireless communication system includes an RF (radio freqeuncy) unit for transmitting and receiving a radio signal, and a processor coupled to the RF unit, wherein the processor is connected to a plurality of wireless devices;
- a physical downlink control channel (PDCCH) for downlink control information (DCI) including a channel quality indicator (CQI) request is transmitted, and a CQI is received from each of the plurality of wireless devices.
- DCI downlink control information
- CQI channel quality indicator
- the burden of signaling due to frequent CQI requests can be reduced.
- the burden of blind decoding of the PDCCH may be reduced, and battery consumption of the wireless device may be reduced.
- 1 shows a structure of a downlink radio frame in 3GPP LTE.
- FIG. 2 is a block diagram showing the configuration of a PDCCH.
- 3 is an exemplary diagram illustrating monitoring of a PDCCH.
- FIG. 5 is a flowchart illustrating a channel state reporting method according to an embodiment of the present invention.
- FIG. 7 is a block diagram illustrating a wireless communication system in which an embodiment of the present invention is implemented.
- a wireless device may be fixed or mobile, and a user equipment (UE) may be a mobile station (MS), a mobile terminal (MT), a user terminal (UT), a subscriber station (SS), or a wireless device. ), A personal digital assistant (PDA), a wireless modem, a handheld device, or other terms.
- the wireless device may be a device that supports only data communication, such as a machine-type communication (MTC) device.
- MTC machine-type communication
- a base station generally refers to a fixed station that communicates with a wireless device.
- the base station BS may be referred to by other terms such as an evolved-NodeB (eNB), a base transceiver system (BTS), and an access point. have.
- eNB evolved-NodeB
- BTS base transceiver system
- access point an access point
- the present invention is applied based on 3GPP long term evolution (LTE) based on 3rd Generation Partnership Project (3GPP) Technical Specification (TS) Release 8 or 3GPP LTE-A based on 3GPP TS Release 10. Describe what happens.
- LTE long term evolution
- 3GPP 3rd Generation Partnership Project
- TS Technical Specification
- the wireless device may be served by a plurality of serving cells.
- Each serving cell may be defined as a downlink (DL) component carrier (CC) or a pair of DL CC and UL (uplink) CC.
- DL downlink
- CC downlink component carrier
- uplink uplink
- the serving cell may be divided into a primary cell and a secondary cell.
- the primary cell is a cell that operates at the primary frequency, performs an initial connection establishment process, initiates a connection reestablishment process, or is designated as a primary cell in a handover process.
- the primary cell is also called a reference cell.
- the secondary cell operates at the secondary frequency, may be established after a Radio Resource Control (RRC) connection is established, and may be used to provide additional radio resources.
- RRC Radio Resource Control
- At least one primary cell is always configured, and the secondary cell may be added / modified / released by higher layer signaling (eg, radio resource control (RRC) message).
- RRC Radio Resource Control
- the cell index (CI) of the primary cell may be fixed.
- the lowest CI may be designated as the CI of the primary cell.
- the CI of the primary cell is 0, and the CI of the secondary cell is sequentially assigned from 1.
- 3GPP LTE-A shows a structure of a downlink radio frame in 3GPP LTE-A. It may be referred to section 6 of 3GPP TS 36.211 V10.2.0 (2011-06) "Evolved Universal Terrestrial Radio Access (E-UTRA); Physical Channels and Modulation (Release 10)".
- E-UTRA Evolved Universal Terrestrial Radio Access
- R-UTRA Physical Channels and Modulation
- the radio frame includes 10 subframes indexed from 0 to 9.
- One subframe includes two consecutive slots.
- the time it takes for one subframe to be transmitted is called a transmission time interval (TTI).
- TTI transmission time interval
- one subframe may have a length of 1 ms and one slot may have a length of 0.5 ms.
- One slot may include a plurality of orthogonal frequency division multiplexing (OFDM) symbols in the time domain.
- OFDM symbol is only for representing one symbol period in the time domain, since 3GPP LTE uses orthogonal frequency division multiple access (OFDMA) in downlink (DL), multiple access scheme or name There is no limit on.
- OFDM symbol may be called another name such as a single carrier-frequency division multiple access (SC-FDMA) symbol, a symbol period, and the like.
- SC-FDMA single carrier-frequency division multiple access
- One slot includes 7 OFDM symbols as an example, but the number of OFDM symbols included in one slot may vary according to the length of a cyclic prefix (CP).
- CP cyclic prefix
- a resource block is a resource allocation unit and includes a plurality of subcarriers in one slot. For example, if one slot includes 7 OFDM symbols in the time domain and the resource block includes 12 subcarriers in the frequency domain, one resource block includes 7 ⁇ 12 resource elements (REs). It may include.
- the DL (downlink) subframe is divided into a control region and a data region in the time domain.
- the control region includes up to three OFDM symbols preceding the first slot in the subframe, but the number of OFDM symbols included in the control region may be changed.
- a physical downlink control channel (PDCCH) and another control channel are allocated to the control region, and a PDSCH is allocated to the data region.
- PDCH physical downlink control channel
- a physical channel is a physical downlink shared channel (PDSCH), a physical downlink shared channel (PUSCH), and a physical downlink control channel (PDCCH), which is a control channel. It may be divided into a Physical Control Format Indicator Channel (PCFICH), a Physical Hybrid-ARQ Indicator Channel (PHICH), and a Physical Uplink Control Channel (PUCCH).
- PCFICH Physical Control Format Indicator Channel
- PHICH Physical Hybrid-ARQ Indicator Channel
- PUCCH Physical Uplink Control Channel
- the PCFICH transmitted in the first OFDM symbol of a subframe carries a control format indicator (CFI) regarding the number of OFDM symbols (that is, the size of the control region) used for transmission of control channels in the subframe.
- CFI control format indicator
- the wireless device first receives the CFI on the PCFICH and then monitors the PDCCH.
- the PCFICH does not use blind decoding and is transmitted on a fixed PCFICH resource of a subframe.
- the PHICH carries a positive-acknowledgement (ACK) / negative-acknowledgement (NACK) signal for an uplink hybrid automatic repeat request (HARQ).
- ACK positive-acknowledgement
- NACK negative-acknowledgement
- HARQ uplink hybrid automatic repeat request
- the ACK / NACK signal for uplink (UL) data on the PUSCH transmitted by the wireless device is transmitted on the PHICH.
- the Physical Broadcast Channel (PBCH) is transmitted in the preceding four OFDM symbols of the second slot of the first subframe of the radio frame.
- the PBCH carries system information necessary for the wireless device to communicate with the base station, and the system information transmitted through the PBCH is called a master information block (MIB).
- MIB master information block
- SIB system information block
- DCI downlink control information
- PDSCH also called DL grant
- PUSCH resource allocation also called UL grant
- VoIP Voice over Internet Protocol
- transmission of DL data packets is performed by a pair of PDCCH and PDSCH.
- the transmission of the UL data packet is performed by a pair of PDCCH and PUSCH.
- the wireless device receives a DL data packet on the PDSCH indicated by the PDCCH.
- the wireless device monitors the PDCCH in the DL subframe and receives the DL resource allocation on the PDCCH.
- the wireless device receives the DL data packet on the PDSCH indicated by the DL resource allocation.
- the base station determines the PDCCH format according to the DCI to be sent to the wireless device, and then attaches a cyclic redundancy check (CRC) to the DCI. ) To the CRC (210).
- CRC cyclic redundancy check
- a unique identifier of the wireless device for example, a C-RNTI (Cell-RNTI) may be masked to the CRC.
- a paging indication identifier for example, P-RNTI (P-RNTI)
- SI-RNTI system information-RNTI
- a random access-RNTI may be masked in the CRC to indicate a random access response that is a response to the transmission of the random access preamble of the wireless device.
- the TPC-RNTI may be masked to the CRC to indicate a transmit power control (TPC) command for the plurality of wireless devices.
- the PDCCH When C-RNTI is used, the PDCCH carries control information for the corresponding specific wireless device (called UE-specific control information) . If another RNTI is used, the PDCCH is used for all or a plurality of wireless devices in the cell. It carries common control information that it receives.
- UE-specific control information control information for the corresponding specific wireless device
- the DCI to which the CRC is added is encoded to generate coded data (220).
- Encoding includes channel encoding and rate matching.
- the encoded data is modulated to generate modulation symbols (230).
- the modulation symbols are mapped to a physical resource element (240). Each modulation symbol is mapped to an RE.
- the control region in the subframe includes a plurality of control channel elements (CCEs).
- the CCE is a logical allocation unit used to provide a coding rate according to the state of a radio channel to a PDCCH and corresponds to a plurality of resource element groups (REGs).
- the REG includes a plurality of resource elements.
- the format of the PDCCH and the number of bits of the PDCCH are determined according to the correlation between the number of CCEs and the coding rate provided by the CCEs.
- One REG includes four REs and one CCE includes nine REGs.
- ⁇ 1, 2, 4, 8 ⁇ CCEs may be used to configure one PDCCH, and each element of ⁇ 1, 2, 4, 8 ⁇ is called a CCE aggregation level.
- the number of CCEs used for transmission of the PDDCH is determined by the base station according to the channel state. For example, for a wireless device having a good downlink channel state, one CCE may be used for PDCCH transmission. Eight CCEs may be used for PDCCH transmission for a wireless device having a poor downlink channel state.
- a control channel composed of one or more CCEs performs interleaving in units of REGs and is mapped to physical resources after a cyclic shift based on a cell ID.
- 3 is an exemplary diagram illustrating monitoring of a PDCCH. This may be referred to in section 9 of 3GPP TS 36.213 V10.2.0 (2011-06).
- blind decoding is used to detect the PDCCH.
- Blind decoding is a method of demasking a desired identifier in a CRC of a received PDCCH (which is called a PDCCH candidate), and checking a CRC error to determine whether the corresponding PDCCH is its control channel.
- the wireless device does not know where its PDCCH is transmitted using which CCE aggregation level or DCI format at which position in the control region.
- a plurality of PDCCHs may be transmitted in one subframe.
- the wireless device monitors the plurality of PDCCHs every subframe.
- monitoring means that the wireless device attempts to decode the PDCCH according to the monitored PDCCH format.
- a search space is used to reduce the burden of blind decoding.
- the search space may be referred to as a monitoring set of the CCE for the PDCCH.
- the wireless device monitors the PDCCH in the corresponding search space.
- the search space is divided into a common search space and a UE-specific search space.
- the common search space is a space for searching for a PDCCH having common control information.
- the common search space includes 16 CCEs up to CCE indexes 0 to 15 and supports a PDCCH having a CCE aggregation level of ⁇ 4, 8 ⁇ .
- PDCCHs (DCI formats 0 and 1A) carrying wireless device specific information may also be transmitted in the common search space.
- the wireless device specific search space supports a PDCCH having a CCE aggregation level of ⁇ 1, 2, 4, 8 ⁇ .
- Table 1 below shows the number of PDCCH candidates monitored by the wireless device.
- the size of the search space is determined by Table 1, and the starting point of the search space is defined differently from the common search space and the terminal specific search space.
- the starting point of the common search space is fixed irrespective of the subframe, but the starting point of the UE-specific search space is for each subframe according to the terminal identifier (eg, C-RNTI), the CCE aggregation level and / or the slot number in the radio frame. Can vary.
- the terminal specific search space and the common search space may overlap.
- the search space S (L) k is defined as a set of PDCCH candidates at a set level L ⁇ ⁇ 1,2,3,4 ⁇ .
- the CCE corresponding to the PDCCH candidate m in the search space S (L) k is given as follows.
- N CCE, k can be used to transmit the PDCCH in the control region of subframe k.
- the control region includes a set of CCEs numbered from 0 to N CCE, k ⁇ 1.
- M (L) is the number of PDCCH candidates at CCE aggregation level L in a given search space.
- variable Y k is defined as follows.
- n s is a slot number in a radio frame.
- the base station sends a CQI request 201 on the PDCCH in the DL subframe.
- the CQI request 201 is included in DCI format 0 or random access response.
- DCI format 0 is used for transmission of the UL grant.
- the UL grant further includes UL resource allocation for the PUSCH.
- the CQI request 201 indicates whether to trigger the CQI report in a 1-bit field. For example, when the value of the CQI request 201 is set to '1', the base station requests the CQI report from the terminal.
- the wireless device sends the CQI 20 to the base station on the PUSCH.
- CQI feedback wideband, UE selected and higher layer-configured.
- PMI feedback types No PMI, Single PMI, and Multiple PMI.
- the transmission mode is divided according to the CQI feedback type and the PMI feedback type as shown in the following table.
- the PMI is selected under the assumption that data is transmitted in each subband.
- the wireless device determines the CQI assuming the selected PMI for the system band or the entire band designated by the upper layer (this is called a set S).
- the wireless device transmits CQI and PMI of each subband. Since the CQIs of the subbands or the entire bands included in the set S are transmitted, it is called a wideband CQI.
- the size of each subvan may vary depending on the size of the system band.
- the wireless device selects M (M> 0) subbands preferred in the system band or set S.
- the wireless device determines the CQIs for the selected M subbands (this is called a subband CQI).
- the wireless device determines the wideband CQI for the system band or set S.
- the wireless device transmits the selected M subbands, one CQI for the selected M subbands, and a wideband CQI.
- Mode 2-2 determines a single PMI for M preferred subbands and M preferred subbands.
- the wireless device determines the wideband CQI for the system band or set S.
- the wireless device transmits the selected M subbands, one CQI for the selected M subbands, a single PMI for the selected M subbands, and a wideband CQI.
- the wireless device determines the wideband CQI. The wireless device then determines the CQI for each subband.
- the terminal determines a single PMI for the system band or set S.
- the UE determines the subband CQI and the wideband CQI for each subband assuming the single PMI.
- CQI is also called channel state information (CSI), and means various indicators for expressing channel state.
- the CQI may include information indicating at least one of a modulation and coding scheme (MCS), a rank indicator (RI), a signal-to-noise-ratio (SNR), and a precoding matrix indicator (PMI).
- MCS modulation and coding scheme
- RI rank indicator
- SNR signal-to-noise-ratio
- PMI precoding matrix indicator
- the CQI may include at least one of a subband CQI and a wideband CQI.
- the MTC service is characterized by low traffic volume and sensitivity to battery efficiency.
- sending a CQI request for each device as in the past increases the number of required PDCCHs and increases the burden on the device due to PDCCH monitoring.
- FIG. 5 is a flowchart illustrating a channel state reporting method according to an embodiment of the present invention.
- wireless devices 510 and 520 are described by way of example, but the number of wireless devices is not limited. Each wireless device may be assigned a group identifier belonging to the MTC group. Wireless device 1 510 and wireless device 2 520 may belong to the same MTC group.
- the base station 530 transmits a CQI request for triggering a CQI report to a plurality of wireless devices (510, 520).
- the CQI request may also be referred to as a group CQI request because it triggers CQI reporting for the plurality of wireless devices 510 and 520.
- the wireless device 1 510 and the wireless device 2 520 report the CQI to the base station 530 according to the CQI request.
- the wireless device 510 or 520 may transmit a CQI on the PUSCH.
- the base station 530 may inform whether it is possible to send a CQI on the PUSCH.
- PUSCH resources for CQI transmission may be pre-allocated to each wireless device.
- Radio device 1 510 and radio device 2 520 may transmit the CQI on the PUCCH simultaneously (eg, the same UL subframe). Each of the radio device 1 510 and the radio device 2 520 may be pre-allocated with different PUCCH resources.
- CQI reporting may be triggered by overlapping a CQI request and a group CQI request using an existing UL grant.
- the wireless devices 510 and 520 may prioritize the CQI request using the UL grant over the group CQI request. Regardless of whether the CQI request is included, only the scheduled PUSCH may be transmitted without transmitting the group CQI by prioritizing the scheduled PUSCH transmission through the UL grant to the group CQI request.
- FIG. 6 shows examples for group CQI request. This is an example in which a group CQI request is transmitted in a DCI format transmitted on a PDCCH.
- Group-RNTI is an identifier indicating a DCI format for a group CQI request.
- the wireless device may monitor the PDCCH based on the G-RNTI.
- the G-RNTI may be defined as a separate identifier regardless of the MTC group or may be defined for each MTC group.
- each 1 bit represents a CQI request of one wireless device. For example, if the corresponding bit is set to '1', the CQI report is triggered. If set to '0', the CQI report is not triggered.
- Each radio device may be previously allocated UL resources (PUSCH resources or PUCCH resources) for group CQI reporting.
- the wireless device reads the CSI request bits allocated to itself in the DCI on the PDCCH identified by the G-RNTI, and performs a CQI report.
- the base station may inform in advance which bit of the DCI each wireless device refers to.
- the CQI request is described as 1 bit, but the CQI request may be n bits (n> 1). If the CQI request is n bits, the base station may inform the wireless device of various additional information for CQI reporting, such as the CQI reporting mode of Table 2.
- 6B is an example in which an identifier of a wireless device for which CQI reporting is triggered is included in DCI.
- 'ID' may be an identifier of each wireless device or an identifier of an MTC group.
- FIG. 7 is a block diagram illustrating a wireless communication system in which an embodiment of the present invention is implemented.
- the base station 50 includes a processor 51, a memory 52, and an RF unit 53.
- the memory 52 is connected to the processor 51 and stores various information for driving the processor 51.
- the RF unit 53 is connected to the processor 51 and transmits and / or receives a radio signal.
- the processor 51 implements the proposed functions, processes and / or methods. In the above-described embodiment, the operation of the base station may be implemented by the processor 51.
- the wireless device 60 includes a processor 61, a memory 62, and an RF unit 63.
- the memory 62 is connected to the processor 61 and stores various information for driving the processor 61.
- the RF unit 63 is connected to the processor 61 and transmits and / or receives a radio signal.
- the processor 61 implements the proposed functions, processes and / or methods. In the above-described embodiment, the operation of the wireless device may be implemented by the processor 61.
- the processor may include application-specific integrated circuits (ASICs), other chipsets, logic circuits, and / or data processing devices.
- the memory may include read-only memory (ROM), random access memory (RAM), flash memory, memory card, storage medium and / or other storage device.
- the RF unit may include a baseband circuit for processing a radio signal.
- the above-described technique may be implemented as a module (process, function, etc.) for performing the above-described function.
- the module may be stored in memory and executed by a processor.
- the memory may be internal or external to the processor and may be coupled to the processor by various well known means.
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Abstract
Description
Search Space Type | Aggregation level L | Size [in CCEs] | Number of PDCCH candidates | DCI formats |
UE-specific | 1 | 6 | 6 | 0, 1, 1A,1B,1D, 2, 2A |
2 | 12 | 6 | ||
4 | 8 | 2 | ||
8 | 16 | 2 | ||
Common | 4 | 16 | 4 | 0, 1A, 1C, 3/3A |
8 | 16 | 2 |
No PMI | Single PMI | Multiple PMI | |
Wideband(wideband CQI) | Mode 1-2 | ||
UE selected (subband CQI) | Mode 2-0 | Mode 2-2 | |
Higherlayer-configured(subband CQI) | Mode 3-0 | Mode 3-1 |
Claims (11)
- 무선 통신 시스템에서 채널 상태 보고 방법에 있어서,무선기기가 복수의 무선 기기에 대한 CQI(channel quality indicator) 요청을 포함하는 DCI(downlink control information)를 위한 PDCCH(Physical Downlink Control Channel)를 모니터링하는 단계; 및상기 CQI 요청에 의해 CQI 보고가 트리거링되면, 상기 무선기기가 기지국으로 CQI를 보고하는 단계를 포함하는 채널 상태 보고 방법.
- 제 1 항에 있어서, 상기 DCI의 CRC(Cyclic Redundancy Check)에는 G-RNTI(Group-Radio Network Temporary Identifier)가 마스킹되는 것을 특징으로 하는 채널 상태 보고 방법.
- 제 1 항에 있어서, 상기 DCI는 복수의 CQI 요청 비트를 포함하고, 상기 복수의 CQI 요청 비트 각각은 복수의 무선기기 각각에 대응하는 것을 특징으로 하는 채널 상태 보고 방법.
- 제 3 항에 있어서, 상기 복수의 CQI 요청 비트 각각은 1비트인 것을 특징으로 하는 채널 상태 보고 방법.
- 제 1 항에 있어서, 상기 DCI는 CQI 보고가 트리거링되는 무선기기의 식별자와 대응하는 CQI 요청 비트를 포함하는 것을 특징으로 하는 채널 상태 보고 방법.
- 제 1 항에 있어서, 상기 DCI는 CQI 보고가 트리거링되는 무선기기의 그룹의 식별자와 대응하는 CQI 요청 비트를 포함하는 것을 특징으로 하는 채널 상태 보고 방법.
- 무선 통신 시스템에서 채널 상태를 보고하는 무선 기기에 있어서,무선 신호를 송신 및 수신하는 RF(radio freqeuncy)부; 및상기 RF부와 연결되는 프로세서를 포함하되, 상기 프로세서는복수의 무선 기기에 대한 CQI(channel quality indicator) 요청을 포함하는 DCI(downlink control information)를 위한 PDCCH(Physical Downlink Control Channel)를 모니터링하고; 및상기 CQI 요청에 의해 CQI 보고가 트리거링되면, 기지국으로 CQI를 보고하는 무선 기기.
- 제 7 항에 있어서, 상기 DCI의 CRC(Cyclic Redundancy Check)에는 G-RNTI(Group-Radio Network Temporary Identifier)가 마스킹되는 것을 특징으로 하는 무선 기기.
- 제 7 항에 있어서, 상기 DCI는 복수의 CQI 요청 비트를 포함하고, 상기 복수의 CQI 요청 비트 각각은 복수의 무선기기 각각에 대응하는 것을 특징으로 하는 무선기기.
- 무선 통신 시스템에서 채널 상태를 수신하는 기지국에 있어서,무선 신호를 송신 및 수신하는 RF(radio freqeuncy)부; 및상기 RF부와 연결되는 프로세서를 포함하되, 상기 프로세서는복수의 무선 기기에 대한 CQI(channel quality indicator) 요청을 포함하는 DCI(downlink control information)를 위한 PDCCH(Physical Downlink Control Channel)를 전송하고; 및상기 복수의 무선 기기 각각으로부터 CQI를 수신하는 기지국.
- 제 10 항에 있어서, 상기 DCI의 CRC(Cyclic Redundancy Check)에는 G-RNTI(Group-Radio Network Temporary Identifier)가 마스킹되는 것을 특징으로 하는 기지국.
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US14/131,151 US9357420B2 (en) | 2011-07-15 | 2012-07-13 | Method and apparatus for reporting channel state |
KR1020137030591A KR101505770B1 (ko) | 2011-07-15 | 2012-07-13 | 채널 상태 보고 방법 및 장치 |
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WO2013012212A1 (ko) * | 2011-07-15 | 2013-01-24 | 엘지전자 주식회사 | 채널 상태 보고 방법 및 장치 |
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WO2014017869A1 (ko) * | 2012-07-27 | 2014-01-30 | 엘지전자 주식회사 | 셀 스위칭 방법 및 장치 |
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EP2939480B1 (en) * | 2012-12-26 | 2018-02-14 | Telefonaktiebolaget LM Ericsson (publ) | Methods, user equipment, radio network node, and computer program product for random access procedures |
WO2015147593A1 (ko) | 2014-03-28 | 2015-10-01 | 엘지전자 주식회사 | 기계타입통신을 지원하는 무선 접속 시스템에서 채널상태정보 전송 방법 및 장치 |
KR102319700B1 (ko) * | 2014-05-02 | 2021-11-01 | 삼성전자 주식회사 | 무선 통신 시스템에서 선택적 채널 피드백 방법 및 장치 |
KR20180089400A (ko) | 2015-11-04 | 2018-08-08 | 인터디지탈 패튼 홀딩스, 인크 | 감소된 대역폭 wtru들을 위한 페이징 절차의 방법 |
US10285170B2 (en) * | 2016-01-19 | 2019-05-07 | Samsung Electronics Co., Ltd. | Method and apparatus for frame structure for advanced communication systems |
CN113193943A (zh) | 2016-04-08 | 2021-07-30 | Idac控股公司 | 关于5g系统内的不同类型业务的phy层复用 |
WO2017181124A1 (en) * | 2016-04-14 | 2017-10-19 | Intel IP Corporation | Low latency physical random access channel design |
EP3535886A1 (en) | 2016-11-02 | 2019-09-11 | IDAC Holdings, Inc. | Shared data channel design |
US10484156B2 (en) | 2016-11-16 | 2019-11-19 | Qualcomm Incorporated | Search space associated with physical downlink control channel based on channel quality indicators |
KR102446700B1 (ko) * | 2017-04-28 | 2022-09-26 | 엘지전자 주식회사 | 무선 통신 시스템에서 채널 상태 정보를 보고하기 위한 방법 및 이를 위한 장치 |
US11223405B2 (en) | 2017-11-17 | 2022-01-11 | Lg Electronics Inc. | Method for reporting channel state information on basis of priorities in wireless communication system and device therefor |
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US20140126409A1 (en) | 2014-05-08 |
KR20140010159A (ko) | 2014-01-23 |
KR101505770B1 (ko) | 2015-03-24 |
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