WO2011142602A2 - Procédé pour transmettre un signal de référence de sondage dans un système de communication sans fil, et appareil associé - Google Patents

Procédé pour transmettre un signal de référence de sondage dans un système de communication sans fil, et appareil associé Download PDF

Info

Publication number
WO2011142602A2
WO2011142602A2 PCT/KR2011/003505 KR2011003505W WO2011142602A2 WO 2011142602 A2 WO2011142602 A2 WO 2011142602A2 KR 2011003505 W KR2011003505 W KR 2011003505W WO 2011142602 A2 WO2011142602 A2 WO 2011142602A2
Authority
WO
WIPO (PCT)
Prior art keywords
cif
channel signal
shared channel
downlink shared
downlink
Prior art date
Application number
PCT/KR2011/003505
Other languages
English (en)
Korean (ko)
Other versions
WO2011142602A3 (fr
Inventor
김학성
서한별
김병훈
Original Assignee
엘지전자 주식회사
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by 엘지전자 주식회사 filed Critical 엘지전자 주식회사
Priority to KR1020127029975A priority Critical patent/KR20130118726A/ko
Publication of WO2011142602A2 publication Critical patent/WO2011142602A2/fr
Publication of WO2011142602A3 publication Critical patent/WO2011142602A3/fr

Links

Classifications

    • 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
    • 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
    • H04L5/0091—Signaling for the administration of the divided path
    • H04L5/0094—Indication of how sub-channels of the path are allocated
    • 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
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W72/00—Local resource management
    • H04W72/20—Control channels or signalling for resource management
    • H04W72/23—Control channels or signalling for resource management in the downlink direction of a wireless link, i.e. towards a terminal

Definitions

  • the present invention relates to a wireless communication system, and more particularly, to a method for receiving a downlink signal and an apparatus therefor.
  • Wireless communication systems are widely deployed to provide various kinds of communication services such as voice and data.
  • a wireless communication system is a multiple access system capable of supporting communication with multiple users by sharing available system resources (bandwidth, transmission power, etc.).
  • multiple access systems include code division multiple access (CDMA) systems, frequency division multiple access (FDMA) systems, TDMACtime division multiple access (TDMA) systems, orthogonal frequency division multiple access (0FDMA) systems, and single carrier frequency division multiple (SC to FDMA) systems.
  • CDMA code division multiple access
  • FDMA frequency division multiple access
  • TDMA time division multiple access
  • OFDMA orthogonal frequency division multiple access
  • SC to FDMA single carrier frequency division multiple
  • access system MC-FDMA (mult i carrier frequency division multiple access) system.
  • An object of the present invention is to provide a method and an apparatus therefor for efficiently utilizing downlink resources in a wireless communication system.
  • a method for receiving a downlink signal in a wireless communication system the downlink having a carrier indication field (CIF) and resource allocation information Receiving a control channel signal; And receiving a downlink shared channel signal from at least one resource block indicated by the resource allocation information in a subframe, wherein the downlink shared channel signal is present in the subframe.
  • CIF carrier indication field
  • Mult iplexing The starting position of the symbol is provided, indicated using the bit information of the CIF.
  • a communication apparatus configured to receive a downlink signal in a wireless communication system, comprising: a radio frequency (RF) unit; And a microprocessor, wherein the microprocessor receives a downlink control channel signal having a carrier indicat ion field (CIF) and resource allocation information and from one or more resource blocks indicated by the resource allocation information in a subframe.
  • RF radio frequency
  • the microprocessor receives a downlink control channel signal having a carrier indicat ion field (CIF) and resource allocation information and from one or more resource blocks indicated by the resource allocation information in a subframe.
  • Configured to receive a downlink shared channel signal wherein a start position of a 0rthogonal frequency division multiplexing (0FDM) symbol in which the downlink shared channel signal is present in the subframe is indicated using bit information of the CIF
  • bit information of the CIF indicates a carrier in which the downlink shared channel signal exists
  • the remaining of the bit information of the CIF indicates a start position of an OFDM symbol in which the downlink shared channel signal exists.
  • bit information of the CIF indicates a resource usage state in the second slot of the subframe, and the remaining of the bit information of the CIF indicates the start position of an OFDM symbol in which the downlink shared channel signal is present. Instruct.
  • the bit information of the CIF indicates a difference between a start position of an OFDM symbol in which a downlink control channel signal exists and a start position of an OFDM symbol in which the downlink shared channel signal exists in the subframe.
  • the start position of the 0FDM symbol in which the downlink shared channel signal is present is indicated using bit information of the CIF and a control format indicator (CFI) value.
  • CFI control format indicator
  • the CFI value is received using an RRCXRadio Resource Control) signal.
  • the downlink control channel signal is R-PDCCH (Relay Physical)
  • the downlink control channel signal is a downlink shared channel signal, and the R-PDSCH (Relay Physical Downlink Shared Channel) signal.
  • downlink resources can be efficiently used in a wireless communication system.
  • FIG. 1 illustrates a structure of a radio frame of a 3GPP system.
  • FIG. 2 illustrates a resource grid for a downlink slot.
  • 3 illustrates a structure of a downlink subframe.
  • FIG. 4 illustrates a structure of an uplink subframe used in a system.
  • 5 illustrates a wireless communication system including a relay.
  • FIG. 6 illustrates backhaul communication using an MBSFN (Mu 11 i -Med i a Broadcast over a Single Frequency Network) subframe.
  • MBSFN Mo 11 i -Med i a Broadcast over a Single Frequency Network
  • CA 7 illustrates a carrier aggregation (CA) communication system.
  • 10 to 14 illustrate a method of notifying a starting point of a (R-) PDSCH (or R-PDCCH) in a backhaul subframe according to an embodiment of the present invention.
  • FIG. 15 illustrates a base station, a relay, and a terminal applicable to the present invention.
  • Embodiments of the present invention may be used in various radio access 85 technologies such as CDMA, FDMA, TDMA, OFDMA, SC-FDMA, MC-FDMA.
  • CDMA may be implemented with a radio technology such as UTRAOJniversal Terrestrial Radio Access (CDMA2000) or CDMA2000.
  • TDMA may be implemented in a wireless technology such as Global System for Mobile Communications (GSM) / General Packet Radio Service (GPRS) / Enhanced Data Rates for GSM Evolution (EDGE).
  • GSM Global System for Mobile Communications
  • GPRS General Packet Radio Service
  • EDGE Enhanced Data Rates for GSM Evolution
  • 0FDMA may be implemented in wireless technologies such as IEEE 802.11 (Wi-Fi), IEEE 802.16 (WiMAX), IEEE 802.20, Evolved UTRA (E-UTRA), and the like.
  • UTRA is part of the UMTSCUniversal Mobile Teleco unications System.
  • 3rd Generation Partnership Project (3GPP) long terra evolution (LTE) is part of Evolved UMTS (E-UMTS) using E-UTRA.
  • LTE-A Advanced is an evolution of 3GPP LTE.
  • FIG. 1 illustrates a structure of a radio frame used in a 3GPP system.
  • a radio frame has a length of 10 ms (30720OT s ) and is composed of 10 equally sized subframes.
  • Each subframe has a length of 1 ms and consists of two slots.
  • the 100 slot has a length of 0.5ms (1536OT s ).
  • ⁇ Represents the sampling time
  • one resource block includes 12 subcarriers ⁇ 7 (6) 0FDM or SC-FDMA symbols.
  • Data is sent
  • a transmission time interval ( ⁇ ), which is 105 units of time, may be determined by one or more subframes.
  • the structure of the above-described radio frame is only an example, and the number of subframes or subslots and the number of 0FDM / SC-FDMA symbols in the radio frame are It can be changed in various ways.
  • FIG. 2 illustrates a resource grid for a downlink slot.
  • downlink slot includes a plurality (e.g., seven) N RB DL of resource blocks included in the OFDM symbols and the frequency domain in the time domain. Since each resource block includes 12 subcarriers, the downlink slot includes N DL RBX12 subcarriers in the frequency domain.
  • FIG. 2 illustrates that the downlink pilot includes 7 OFDM symbols and the resource block includes 12 subcarriers, but is not limited thereto.
  • the number of OFDM symbols included in the downlink slot may be modified according to the length of the cyclic prefix (CP).
  • CP cyclic prefix
  • Each element on the resource grid is called a resource element (RE).
  • the RE is a minimum time / frequency resource defined in a physical channel, indicated by one OFDM symbol index and one subcarrier index.
  • One resource block is composed of xw REs.
  • w b is the number of OFDM symbols included in the downlink 120 slot and
  • N s is the number of subcarriers included in the resource block.
  • the number Nb of a resource block included in a downlink slot depends on a downlink transmission bandwidth set in a cell.
  • FIG. 2 illustrates a structure of a downlink subframe used in a 3GPP system.
  • the control channel includes a Physical Control Format Indicator CHannel (PCFICH), a Physical Hybrid-automatic Repeat Request (ARQ) Indicator CHannel (PHICH), and a Physical Downlink Control CHannel (PDCCH).
  • the traffic channel includes a Physical Downlink Shared CHannel (PDSCH).
  • PDCCH is POKPaging channel (Transport channel) and Downlink-shared (DL_SCH)
  • Paging channel PCH
  • DL-SCH downlink-shared channel
  • DCI downlink control information
  • the base station determines the PDCCH format according to the DCI to be sent to the terminal, and attaches a CRC (Cyclic Redundancy Check) to the control information.
  • the CRC contains a unique identifier (eg, RNTI (Radio) depending on the owner or purpose of the PDCCH.
  • a subframe 500 having a length of 1 ms which is a basic unit of LTE uplink transmission, is composed of two 0.5 ms slots 501. Assuming the length of the Normal Cyclic Prefix (CP), each slot has seven symbols (502).
  • CP Normal Cyclic Prefix
  • a resource block (RBK503) is a resource allocation unit corresponding to 12 subcarriers in the frequency domain and one slot in the time domain.
  • the structure of an uplink subframe of LTE is largely divided into a data region 504 and a control region 505.
  • the data area means a communication resource used in transmitting data such as voice and packet transmitted to each terminal and is a PUSCH (Physical).
  • the control region means a communication resource used to transmit an uplink control signal, for example, a downlink channel quality report from each user equipment, a reception ACK / NACK for the downlink signal, an uplink scheduling request, and the like.
  • PUCCHCPhysical Uplink Control Channel PUCCHCPhysical Uplink Control Channel ).
  • the sounding reference signal (SRS) is the last on the time axis in one subframe.
  • SRS 160 is transmitted via the SC-FDMA symbol located.
  • SRSs of the various terminals to be transmitted may be classified according to frequency position / sequence.
  • a wireless communication system includes a base station, a relay and
  • the terminal 165 includes a terminal.
  • the terminal performs communication with the base station or the relay.
  • a terminal that communicates with a base station is referred to as a macro UE
  • a terminal that communicates with a relay is referred to as a relay UE.
  • the communication link between the base station and the macro terminal is referred to as a macro access link
  • the communication link between the relay and the relay terminal is referred to as a relay access link.
  • the 170 link is referred to as the backhaul link.
  • L1 relay usually performs the function of a repeater and simply amplifies the signal from the base station / terminal to the terminal / base station.
  • the operation of the 180 relay may be represented as decode-and-forward and may transmit user plane traffic to L2.
  • L3 relays also known as self-backhauling, can send IP packets to L3. It also includes RRCCRadio Resource Control (RRCCRadio Resource Control) capabilities
  • the LI and L2 relay may be described as a case where the relay is part of a donor cell covered by the corresponding base station.
  • the relay is a relay
  • the relay cannot have its own cell ID because it does not control its own cell and its terminals.
  • a relay ID which is an ID of a relay, may have a relay ID. Also
  • RRM Radio Resource Management
  • An L3 relay is when a relay can control its own cell.
  • the relay may manage one or more cells, and each cell managed by the relay may have a unique physical-layer cell ID.
  • 195 may be connected to a cell managed by a relay or a cell managed by a general base station.
  • relays are classified as follows according to mobility.
  • Fixed RN Fixed permanently, used to increase shadow area or cell coverage. Simple Repeater function is also available.
  • Nomadic RN A relay that can be temporarily installed or moved randomly within a building when the user suddenly increases.
  • Mobile RN Relays that can be mounted on public transport such as buses or subways.
  • In-band connection The network-to-relay link and the network-to-terminal link share the same frequency band within the donor cell.
  • Out-band connection Within the donor cell, network-to-relay link and network-to-terminal link use different frequency bands.
  • 210-Transparent Relay The UE cannot know that communication with the network is performed through the relay.
  • Non-transparent relay The terminal knows that communication with the network is performed through the relay.
  • the base station-relay link (ie, backhaul link) operates in the same frequency band as the relay-terminal link (ie, relay access link).
  • the relay transmitter and receiver cause interference with each other, so that the relay can simultaneously transmit and receive.
  • the backhaul link and the relay access link are TDM
  • LTE-A establishes a backhaul link in an MBSFN subframe to support measurement operations of legacy LTE terminals existing in a relay zone (fake MBSFN method).
  • the relay may configure a backhaul link using the data region of the corresponding subframe.
  • the relay PDCCH R-PDCCH
  • a specific OFDM symbol of the 225 MBSFN subframe may be transmitted using a specific resource region in the last OFDM symbol.
  • the LTE-A system aggregates a plurality of uplink / downlink frequency blocks for a wider frequency band and uses a larger uplink / downlink bandwidth.
  • CC may be understood as a carrier frequency (or center carrier, center frequency) for a corresponding frequency block.
  • respective CCs may be adjacent to each other or non-adjacent in the frequency domain.
  • the bandwidth of each component carrier can be determined independently.
  • the configuration may correspond to 2: 1.
  • the DL CC / UL CC link may be fixed in the system or configured semi-statically.
  • the frequency band that can be monitored / received by a specific terminal may be limited to M ( ⁇ N) CCs.
  • control information is only through a specific CC It may be set to transmit and receive.
  • This specific CC may be referred to as a primary CCXPrimary CC (PCC) (or anchor CC), and the remaining CC may be referred to as a secondary CCX Secondary CC (SCC).
  • PCC primary CCXPrimary CC
  • SCC secondary CCX Secondary CC
  • 3GPP uses the concept of a cell for the management of radio resources.
  • a cell is defined as a combination of downlink resources and uplink resources, and uplink resources are not required. Therefore, the sal may be configured with only downlink resources, or with downlink resources and uplink resources. If carrier aggregation is supported, the linkage between the carrier frequency (or DL CC) of the downlink resource and the carrier frequency (or UL CC) of the uplink resource is
  • a cell operating on a primary frequency may be referred to as a primary cell (PCell) and a cell operating on a secondary frequency (or SCC) may be referred to as a secondary cell (SCell).
  • PCell primary cell
  • SCC secondary frequency
  • the PCell is used by the terminal to perform an initial connection establishment process or to perform a connection re-establishment process. PCell is in the process of handover
  • the SCell is configurable after the RRC connection is established and can be used to provide additional radio resources.
  • PCell and SCell may be collectively referred to as a serving cell. Therefore, in the case of the UE that is in the RRC ONNECTED state, but carrier aggregation is not configured or does not support carrier aggregation, there is only one serving cell configured only with the PCell.
  • the terminal in the RRC_C0NNECTED state and the carrier merge is set
  • one or more serving cells exist, and all serving cells include a PCell and an entire SCell.
  • the network may configure one or more SCells for terminals supporting carrier aggregation in addition to the PCell initially configured in the connection establishment process.
  • the 3GPP LTE-A system is designed to use multiple carriers and can introduce up to five carriers to the downlink / uplink.
  • the system may be configured with two downlink carriers and two uplink carriers. One of the two carriers becomes the primary carrier and the other One is a secondary carrier. If cross carrier scheduling is set,
  • the 270 primary carrier may perform scheduling for the secondary carrier.
  • the DCKdownlink control information transmitted on the primary carrier has a Carrier Indication Field (CIF) field.
  • the CIF field is used to indicate which carrier the DCI on the primary carrier schedules. For example, when the CIF field is 3 bits, eight carriers can be indicated.
  • FIG. 8 shows an example of indicating a carrier using a CIF field.
  • CC # 1 there are five carriers (CC # 1 to # 5) and CC # 1 is the primary carrier.
  • the base station transmits a DCI having a CIF field on the primary carrier (CC # 1) to the terminal.
  • DCI includes DCI for UL scheduling or DCI for DL scheduling.
  • CC # 1 On CC # 1
  • the DCI transmitted is applied to CCs (eg, CC # 3 and CC # 5) indicated by the CIF field.
  • control region size of each carrier shows an example of informing the control region size of each carrier.
  • the control region size (e.g., number of OFDM symbols) of each carrier is indicated using a CFKControl Format Indicator.
  • the CFI for the carrier may be delivered to the UE by a higher layer signal (eg, RRC signal).
  • Figure shows one downlink subframe per carrier
  • CFI may be independently provided for each CC.
  • a control region eg, PDCCH
  • a data region eg, PDSCH
  • the terminal interprets the left side as the control region and the right side as the data region based on the OFDM symbol indicated by the CFI.
  • the terminal interprets the left side as the control region and the right side as the data region based on the OFDM symbol indicated by the CFI.
  • Control information eg, PDCCH signal
  • data eg, PDSCH signal
  • the DCI format with the CIF field can also be used for the relay backhaul link.
  • the DCI format for multi-carrier is useful when carrier aggregation is introduced in the backhaul link.
  • carrier aggregations e.g. 2
  • DCI format with CIF field can be used even when no carrier merge is performed.
  • the CIF field defined in the DCI format may be used not only for its original purpose but also for conveying other meanings. For example, if only two carriers are used for the backhaul link, the cross carrier scheduling information only needs 2 bits. Also, backhaul
  • the primary carrier is always scheduled in the 300 link.
  • the information for the cross carrier scheduling is divided into 1 bit. Therefore, the extra 1 or 2 bits in the CIF field can be used for other purposes.
  • eNB PDCCH is a base station
  • the RN PDCCH indicates a PDCCH transmitted by the relay to the UE.
  • R-PDCCH represents a PDCCH transmitted by the base station to the relay.
  • the (R-) PDSCH indicates a PDSCH transmitted by a base station to a relay.
  • Resource allocation for the PDSCH may be made in resource block units, resource block group units, or on one or more consecutive resource blocks according to a resource allocation type.
  • the 310 R-PDCCH is classified into DL Grant (Downl Grant Grant, DG) and UL Grant (Upl Ink Grant, UG).
  • the DL grant includes information on time / frequency / spatial resources of the (R-) PDSCH corresponding to data that the relay should receive and information for decoding (in other words, scheduling information).
  • the UL grant provides information and decoding on the time / frequency / spatial resources of the (R-) PUSCH corresponding to the data that the relay should transmit on the uplink.
  • the 315 Contains information for doing so (in other words, scheduling information).
  • the DL grant is in the RB of the first slot and the UL grant is in the RB of the second slot.
  • the extra bits in the CIF field may be used for indicating, for example, what information exists in the relay backhaul subframe. Specifically, if there is an R-PDCCH in the first slot / region, the extra bit in the CIF field is the second.
  • the extra bits in the CIF field indicate what information (eg, UL grant, (R-) PDSCH) is present in the second slot of the RB pair in which the R-PDCCH is detected. Can be used for purposes.
  • the CIF field may be used to designate a starting point of the (R-) PDSCH (or 325 R-PDCCH) in a subframe.
  • the following cases are possible.
  • Some or all of the CIF fields in the R-PDCCHCDCI format dynamically specify (eg, subframe-by-subframe) the number of symbols of the start symbol of the (R-) PDSCH or the symbol of the eNB PDCCH (or RN PDCCH). Can be used.
  • the relay may determine the start position of the (R-) PDSCH based on the number of symbols of the eNB 330 PDCCH (or RN PDCCH).
  • the relationship between the start position of the (R-) PDSCH and the number of symbols in the eNB PDCCH (or RN PDCCH) is pre-specified (e.g. in the form of an offset), so that the relay can be configured from the CIF field to the eNB PDCCH (or RN PDCCH). It is possible to determine the number of symbols and determine the starting position of the (R-) PDSCH from the number of symbols of the eNB PDCCH (or RN PDCCH). The following situations may exist. 335 (a) The case where the R-PDCCH start symbol is fixed: The case where the position of the R-PDCCH is fixed in the time domain and only the start position of the (R-) PDSCH is changed.
  • the relay Since the resource region of the R-PDCCH is fixed in the time domain, the relay only needs to perform blind decoding for receiving the R-PDCCH only within the corresponding time resource region.
  • the relay receives (R-) PDSCH signal from one or more 340 resource blocks indicated by the DL grant and performs decoding.
  • the time resource region in which the (R-) PDSCH signal is present is indicated using the bit information of the CIF.
  • some bits (eg 2 bits) in the CIF field may be used for the original CIF 345 and the remaining bits (eg 1 bit) may be used to specify the (R-) PDSCH start position. Since the number of RN PDCCH symbols can be fixed to 1 or 2, there are only two significant positions where there can be a start symbol of (R-) PDSCH (eg, OFDM symbols # 2 and # 3) (when indexing from # 0). In this case, the (R-) PDSCH start position may be designated as 1 bit. 350 ii. Non-CA Case
  • one bit may be used for 355 for specifying a (R-) PDSCH start position in the CIF field, and the remaining bits may be used for resource allocation (RA).
  • RA resource allocation
  • the remaining bits in the CIF field are the first and second of three RB pairs constituting the RBG. It can be used to indicate what information has been transmitted 360 in the resource area (eg, pilot).
  • the RBG associated with the CIF field may be limited to the RBG from which the DL grant is detected.
  • some bits in the existing RA bits can be used to inform the (R-) PDSCH start position and / or information about the second slot (eg usage status).
  • R-PDCCH start symbol is changed (semi-static / semi-dynamically):
  • the start position of the R-PDCCH / (R-) PDSCH in the time domain may be changed.
  • the period in which the start position of the R-PDCCH and the start position of the (R-) PDSCH may vary may be different.
  • the variation of the R-PDCCH start symbol may be semi-static / semi-dynamic.
  • Variable of R-PDCCH start symbol is CIF
  • the relay must perform blind decoding for R-PDCCH reception in a plurality of candidate time resource regions. If an R-PDCCHCDL grant is detected, the relay can confirm therefrom the start symbol of the R-PDCCH. The relay is then (R-) PDSCH from one or more resource blocks indicated by the DL grant.
  • the bit e.g., two bits
  • the remaining bits e. G., 1 bit
  • the bit can be used to specify the (R-) PDSCH starting position.
  • All bits of the CIF can be used to specify the (R-) PDSCH start symbol position if the DCI format with CIF is predetermined to be used, even if CA is not configured.
  • one bit may be used to designate a (R-) PDSCH start position in the CIF field, and the remaining bits may be used for RA.
  • one bit in the CFI field indicates whether the (R-) PDSCH start position is OFDM symbol # 2 or # 3, and the remaining two bits are R-PDCCH / (R-) PDSCH / empty placement. ) Can be used to indicate
  • the CIF information is used to carry semi-static information about the number of symbols of the start symbol of the (R-) PDSCH or the RN PDCCH.
  • the start position of the (R-) PDSCH and the R-PDCCH may be transmitted using CIF.
  • This method may be combined with the method of notifying the RRC of the starting positions of the (R-) PDSCH and the R-PDCCH or may be used separately if necessary.
  • the CIF field is a dynamic information field, when the CIF field is used for carrying semi-static information, the CIF field can be used to convey more specific information because there is enough space. For example, in the case of indicating the start position of the (R-) PDSCH / R-PDCCH using 2 bits in the CIF field, the first 1 bit gives information about the start position, and the second 1 bit is semi-static.
  • FIG. 405 illustrates in more detail a method of indicating a starting point.
  • the figure corresponds to one downlink subframe (eg, MBSFN subframe) and the number in the box indicates the OFDM symbol index.
  • MBSFN subframe e.g. MBSFN subframe
  • R-PDCCH for DL grant
  • R-PDSCH PDSCH corresponding thereto are shown.
  • FIG. 10 shows (R-) PDSCH using CIF with the start position of R-PDCCH fixed
  • the location of the R-PDCCH is fixed to OFDM symbol # 3.
  • R— A method of fixing the PDCCH may be used, either permanent or semi-static. If the start position of the R-PDCCH is semi-statically fixed, RRC signaling is required to support variability.
  • the start position of the (R-) PDSCH is dynamically indicated using CIF. In this example, the start position of the (R-) PDSCH is OFDM
  • the relay decodes using resources of OFDM symbols # 3 to # 6 to receive an R-PDCCH and decodes using resources of 0FDM symbols # 2 to # 6 to receive an R-PDSCH.
  • the indication of the start position of the (R-) PDSCH using the CIF may be variously implemented.
  • at least some bits (eg, 1 or 2 bits) in the CIF field may include
  • the 420 may directly indicate a start position (eg, 0FDM symbol # 2).
  • at least some bits in the CIF field may indicate a difference (eg, an offset) from a reference position.
  • the reference position for specifying the start position of the (R-) PDSCH may be 0FDM symbol # 2 (in this example, the offset is +1) or the start position of the R-PDCCH (the offset in this example is ⁇ 1 applies). More specifically, the RRC signaled CFI is set to the starting position of the R-PDCCH.
  • the CIF information of the DCI format may be used for indicating a difference between the R-PDCCH start symbol and the (R-) PDSCH start symbol.
  • the CIF field specifies the starting position of the (R-) PDSCH. Unused bits are used to indicate the carrier to which the R-PDCCH is applied depending on the intended use.
  • the bits that are not used to specify the starting position of the (R-) PDSCH in the CIF field may be used for other purposes, for example, the resource usage status of the second slot (eg UL grant existence). Can be used to indicate.
  • FIG. 11 to 12 illustrate a method of notifying the start position of the R-PDCCH and the (R-) PDSCH start position using CIF.
  • FIG. 11 illustrates a case in which the start position of the R-PDCCH and the (R-) PDSCH start position are independently provided 440.
  • FIG. 12 illustrates a case in which the start position of the R-PDCCH and the (R-) PDSCH start position are equally limited.
  • This scheme is basically the same as described with reference to FIG. 10 except that the location of the R-PDCCH is also changed using CIF.
  • the present scheme can be applied to different start positions of R-PDCCH for each carrier.
  • all or part of 445 bits of the CIF field may be used. If the start position of the R-PDCCH / (R-) PDSCH cannot be freely designated by using only some bits of the CIF field, some bits of the CIF field may be used in combination with other values. For example, some bits of the CIF field and CFI may be combined to designate a start position of the R-PDCCH / (R-) PDSCH.
  • Equation 2 shows a case where a combination of CFI and CIF is used.
  • R-PDCCH start ing symbol f (CFI, CIFa), and / or
  • fa and fb represent functions having CFI and CIF as arguments.
  • fa and fb can be given differently or equally.
  • f a and fb may be in the form of CFI + 455 A a and CFI + b, respectively.
  • ⁇ 3 and ⁇ ) may mean a difference value (offset) determined by the CIF value.
  • CIFa and CIFb represent all or some bits of the CIF field.
  • CIFa and CIFb can have different values or the same value have.
  • CIFa and CIFb may be treated with different bits of the CIF field, respectively.
  • the CIF information can be used for notifying only the difference value based on the RRC signaled CFI information for each carrier. Do.
  • the scheduler transmits using only DCI formats including the CIF field when the CA is set in the backhaul link, and the CIF field is not set when the CA is set.
  • the 465 may be restricted to transmit using only DCI formats that are not included.
  • the above-described methods can be applied using a limited bit CIF.
  • CIF is not available, so that by reinterpreting the existing RA bits, the extra bits can be used for the previously presented method.
  • the backhaul always uses the DCI format with CIF, regardless of whether it is CA
  • non-CA CIF field may be used for other purposes. This allows more free resource allocation and R-PDCCH multiplexing in non-CA mode.
  • FIG. 13-14 illustrate a method of informing the R-PDCCH and / or (R-) PDSCH start position in a situation where a plurality of CCs are configured and there are a plurality of relays.
  • FIG. 13 illustrates a case in which CFIs are independently designated for each CC, and R-PDCCH start positions of all RNs are set / fixed to the same position in the corresponding CC.
  • the start position of the R-PDCCH may be fixed at a specific symbol position at all times or semi-statically. If it is fixed semi-statically, the starting position of the R-PDCCH may be specified semi-statically using the RRC CA CFI.
  • the (R-) PDSCH of the RN may be specified semi-statically using the RRC CA CFI.
  • the 480 start position may be set differently for each RN using the CIF.
  • FIG. 13 assumes that two carriers are merged and two relays RN1 and RN2 use both CC # 1 and CC # 2.
  • the CFI is set independently for each CC and the relays using the respective CCs may be set differently, it is assumed that RN1 and RN2 use both CC # 1 and CC # 2 for convenience.
  • the RN PDCCH size can be set differently when CC is different from one relay point of view.
  • the RN PDCCH size of RN1 in CC # 1 is 2
  • the RN PDCCH size of RN2 is 1
  • the RN PDCCH size of RN1 in CC # 2 is 1
  • the RN PDCCH size of RN2 is 2
  • the start position of the (R-) PDSCH in a specific CC is the full or CIF field of the DCI format that supports the CC.
  • 490 can be indicated using some bits (eg, 1 bit).
  • the R-PDCCH starting position is used by using additional information of about 1 bit.
  • a method of informing relative information about PDCCH may be used.
  • ⁇ is indicated using 1 bit information of the CIF field.
  • FIG. 14 illustrates a case in which a CFI is independently designated for each CC and an R—PDCCH start position of each RN may be set differently in the corresponding CC.
  • the R-PDCCH start position of each R may be independently set by using an RRC signal or independently by using the number of CFI and RN PDCCH symbols for each CC.
  • the (R-) PDSCH start position of the RN may be set differently for each RN using CIF as shown in FIG. 13. This plan
  • constraints may be additionally considered. This makes resource management easier.
  • the RN PDCCH size for each RN maintains the same value across all CCs.
  • _ RN1 kl for al l the CCs (CC # 1, CC # 2 ).
  • -RN2 k2 for al l the CCs (CC # 1, CC # 2 ...
  • the above description has been described focusing on the relationship between the base station and the relay, the above description may be equally / similarly applied to the relationship between the base station and the terminal, and the relay and the terminal.
  • the relay when applied to the relationship between the base station and the terminal, in the above description, the relay may be replaced with the terminal.
  • the base station when applied to the relationship between the relay and the terminal, in the above description, the base station may be replaced with a relay and the relay may be replaced with a terminal.
  • FIG. 15 illustrates a base station, a relay, and a terminal applicable to the present invention.
  • a wireless communication system includes a base station (BS) 110, a relay (RN, 130), and a terminal (UE) 130.
  • BS base station
  • RN relay
  • UE terminal
  • the base station 110 includes a processor 112, a memory 114, and a radio frequency:
  • the processor 112 may be configured to implement the procedures and / or methods proposed in the present invention.
  • the memory 114 is connected with the processor 112 and stores various information related to the operation of the processor 112.
  • the RF unit 116 is connected with the processor 112 and transmits and / or receives a radio signal.
  • the relay 120 includes a processor 122, a memory 124, and a radio frequency unit 126. Processor 122
  • the 530 may be configured to implement the procedures and / or methods proposed in the present invention.
  • the memory 124 is connected with the processor 122 and stores various information related to the operation of the processor 122.
  • the RF unit 126 is connected with the processor 122 and transmits and / or receives a radio signal.
  • the terminal 130 includes a processor 132, a memory 134, and an RF unit 136.
  • the processor 132 is configured to implement the procedures and / or methods proposed in the present invention.
  • the memory 134 is connected with the processor 132 and stores various information related to the operation of the processor 132.
  • the RF unit 136 is connected with the processor 132 and transmits and / or receives a radio signal.
  • the base station 110, the relay 120, and / or the terminal 130 may have a single antenna or multiple antennas.
  • Each component or feature is to be considered optional unless stated otherwise.
  • Each component or feature may be embodied in a form that is not combined with other components or features. It is also possible to combine some of the components and / or features to constitute an embodiment of the invention. The order of the operations described in the embodiments of the present invention may be changed. Some configurations or features of certain embodiments
  • embodiments of the present invention are mainly data between a terminal, a relay, and a base station.
  • 550 has been described focusing on the transmission and reception relationship. 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 a 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.
  • the base station
  • the 555 may be replaced by terms such as a fixed station, a Node B, an eNode B (eNB), an access point, etc.
  • the terminal may be a UE Jser Equipment (MS), a Mobile Station (MS), or a MSS (Mobile). Subscriber Station).
  • Embodiments according to the present invention may be implemented by various means, for example, hardware, firmware, software, or a combination thereof.
  • an embodiment of the present invention may include one or more ASICs application specific integrated circuits, DSPs digital signal processors, DSPDs (digital signal processing devices), programmable logic devices (PLDs), FPGAs C field programmable gate arrays. ), A processor, a controller, a microcontroller, a microprocessor, or the like.
  • an embodiment of the present invention It may be implemented in the form of a module, procedure, function, etc. that performs the described functions or operations.
  • the software code may be stored in a memory unit and driven by a processor.
  • the memory unit may be located inside or outside the processor, and may exchange data with the processor by various known means.
  • the present invention relates to a wireless communication system, and specifically, may be applied to a base station, a relay, and a terminal.

Landscapes

  • Engineering & Computer Science (AREA)
  • Signal Processing (AREA)
  • Computer Networks & Wireless Communication (AREA)
  • Mobile Radio Communication Systems (AREA)

Abstract

L'invention concerne un procédé et un appareil pour recevoir un signal de liaison descendante dans un système de communication sans fil. Plus particulièrement, l'invention concerne un procédé pour recevoir un signal de liaison descendante, comprenant : une étape de réception d'un signal de canal de commande de liaison descendante ayant un champ d'indication de porteuse (CIF) et des informations d'attribution de ressources ; et une étape de réception, dans une sous-trame, d'un signal de canal partagé de liaison descendante depuis un ou plusieurs blocs de ressources indiqués par les informations d'attribution de ressources. Le point de départ, dans la sous-trame, d'un symbole de multiplexage par répartition orthogonale de la fréquence (OFDM), dans lequel le signal de canal partagé de liaison descendante est présent, est indiqué par les informations binaires du CIF.
PCT/KR2011/003505 2010-05-12 2011-05-12 Procédé pour transmettre un signal de référence de sondage dans un système de communication sans fil, et appareil associé WO2011142602A2 (fr)

Priority Applications (1)

Application Number Priority Date Filing Date Title
KR1020127029975A KR20130118726A (ko) 2010-05-12 2011-05-12 무선 통신 시스템에서 사운딩 참조 신호 송신 방법 및 이를 위한 장치

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
US33375910P 2010-05-12 2010-05-12
US61/333,759 2010-05-12

Publications (2)

Publication Number Publication Date
WO2011142602A2 true WO2011142602A2 (fr) 2011-11-17
WO2011142602A3 WO2011142602A3 (fr) 2012-03-01

Family

ID=44914833

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/KR2011/003505 WO2011142602A2 (fr) 2010-05-12 2011-05-12 Procédé pour transmettre un signal de référence de sondage dans un système de communication sans fil, et appareil associé

Country Status (2)

Country Link
KR (1) KR20130118726A (fr)
WO (1) WO2011142602A2 (fr)

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR102410281B1 (ko) * 2014-11-11 2022-06-20 한국전자통신연구원 이동통신 시스템에서의 전송 시간 구간 구성 방법 및 장치

Non-Patent Citations (4)

* Cited by examiner, † Cited by third party
Title
ERICSSON; ST ERICSSON: 'Considerations on R-PDCCH design' 3GPP TSG-RAN WG1 #61 RL-102634 05 May 2010, MONTREAL, CANADA, XP050420302 *
LG ELECTRONICS INC: 'Uplink CC-to-CI Mapping for Carrier Aggregation' 3GPP TSG-RAN WG1 #61 RL-102713 04 May 2010, MONTREAL, CANADA, XP050419916 *
LG ELECTRONICS: 'Carrier Index (CI) Configuration per UE for Carrier Aggregation' 3GPP TSG-RAN WG1 #61 RL-102714 04 May 2010, MONTREAL, CANADA, XP050419917 *
ZTE: 'PCFICH detection error handling' 3GPP TSG-RAN WG1 #61 RL-100961 16 February 2010, SAN FRANCISCO, USA, XP050418547 *

Also Published As

Publication number Publication date
KR20130118726A (ko) 2013-10-30
WO2011142602A3 (fr) 2012-03-01

Similar Documents

Publication Publication Date Title
US10630442B2 (en) Method and device for transmitting a sounding reference signal
KR101761624B1 (ko) 무선 통신 시스템에서 릴레이가 하향링크 신호를 처리하는 방법 및 그 장치
US9736819B2 (en) Relay node device for receiving control information from a base station and method therefor
US9185699B2 (en) Method and apparatus for wireless resource allocation for relay in wireless communication system
KR101227740B1 (ko) 서브프레임의 무선자원 할당 방법 및 장치
EP2378675B1 (fr) Procédé de transmission de signaux utilisant une sous-trame mbsfn dans un système de communication radio
KR101785659B1 (ko) 릴레이 시스템에서 통신을 수행하는 방법 및 장치
US8665775B2 (en) Method and apparatus in which a relay station makes a hybrid automatic repeat request in a multi-carrier system
KR101861661B1 (ko) 무선통신 시스템에서 제어정보를 송신 및 수신하기 위한 장치 및 그 방법
KR20110014101A (ko) 릴레이 백홀 자원 할당
WO2012173445A2 (fr) Procédé de transmission/réception de données dans un système d'accès sans fil et terminal correspondant
KR20110104497A (ko) 중계기에 대한 자원 할당 방법
WO2013028018A2 (fr) Procédé visant à émettre et à recevoir des signaux de synchronisation dans un système d'accès sans fil et appareil à cet effet
KR20110039207A (ko) 무선 통신 시스템에서 상향링크 백홀 신호를 송신 및 수신을 위한 장치 및 그 방법
KR101973465B1 (ko) 이동통신 시스템에서 백홀 링크 서브프레임 구조 및 그 정보 전송 방법
WO2011142576A2 (fr) Procédé et appareil de réception de signaux de liaison descendante
WO2013111601A1 (fr) Conception de canal de commande d'acheminement de liaison descendante pour relais
WO2011142574A2 (fr) Procédé et dispositif de réception de signaux de liaison descendante
JP2014514843A (ja) 無線通信システムにおける制御情報の送信方法及び装置
WO2011142602A2 (fr) Procédé pour transmettre un signal de référence de sondage dans un système de communication sans fil, et appareil associé
KR20130038784A (ko) 제어 채널 전송 방법 및 그를 위한 릴레이 시스템

Legal Events

Date Code Title Description
121 Ep: the epo has been informed by wipo that ep was designated in this application

Ref document number: 11780819

Country of ref document: EP

Kind code of ref document: A2

NENP Non-entry into the national phase

Ref country code: DE

ENP Entry into the national phase

Ref document number: 20127029975

Country of ref document: KR

Kind code of ref document: A

122 Ep: pct application non-entry in european phase

Ref document number: 11780819

Country of ref document: EP

Kind code of ref document: A2