WO2012083766A1 - Procédé, système et dispositif de transmission et de détection de canal de commande de liaison descendante physique - Google Patents

Procédé, système et dispositif de transmission et de détection de canal de commande de liaison descendante physique Download PDF

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Publication number
WO2012083766A1
WO2012083766A1 PCT/CN2011/082024 CN2011082024W WO2012083766A1 WO 2012083766 A1 WO2012083766 A1 WO 2012083766A1 CN 2011082024 W CN2011082024 W CN 2011082024W WO 2012083766 A1 WO2012083766 A1 WO 2012083766A1
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WIPO (PCT)
Prior art keywords
pdcch
carrier
base station
user equipment
occupied
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PCT/CN2011/082024
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English (en)
Chinese (zh)
Inventor
潘学明
沈祖康
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大唐移动通信设备有限公司
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Publication of WO2012083766A1 publication Critical patent/WO2012083766A1/fr

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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

Definitions

  • the present invention relates to the field of wireless communications, and in particular, to a method, system and device for transmitting and detecting a physical downlink control channel in a long term evolution upgrade system.
  • each component carrier in carrier aggregation satisfies the backward compatibility feature, that is, each component carrier can be independent. Work, and access the version 8/9 user equipment (UE).
  • UE user equipment
  • the non-backward compatible carriers proposed in the LTE-A system mainly include an extension carrier and a carrier segment.
  • the extended carrier is a non-backward compatible carrier, and cannot exist independently, but must be compatible with a stand-alone-capable carrier aggregation.
  • the available bandwidth of an extended carrier is the same as that supported by version 8, that is, ⁇ 6, 15, 25, 50, 75, 100 ⁇ RBs, and the sum of the bandwidth of one backward compatible carrier and one extended carrier can be greater than 110 resources.
  • Resource Block (RB) A hybrid carrier's Hybrid Automatic Repeat reQuest (HARQ) process, resource scheduling, and transmission mode configuration are all independently performed.
  • the cell feature signal is not transmitted in the extended carrier, and the cell feature signal includes a Primary Synchronized Signal (PSS), a Secondary Synchronization Signal (SSS), a Broadcast Channel (BCH) signal, etc., and thus cannot Providing the presence of user equipment (UE), and most other proposals indicate that the extension carrier should not transmit Cell-specific reference signals (CRS), so the downlink control channel based on CRS demodulation includes physical downlink control.
  • Channel Physical Downlink Control Channel, PDCCH
  • PHICH Physical HARQ Indication Channel
  • PCFICH Physical Control Format Indication Channel
  • FIG. 1 shows an example of an extension carrier in which only service data and a corresponding Demodulation Reference Symbol (DMRS) are included in the extension carrier, and the service data includes a Physical Downlink Shared Channel (Physical Downlink Shared Channel, PDSCH) and data of a Physical Uplink Shared Channel (PUSCH).
  • DMRS Demodulation Reference Symbol
  • the carrier segment cannot exist independently, but is attached to a certain physical resource.
  • a backward-to-compatible carrier exists, strictly speaking, the use of carrier fragments does not require carrier aggregation.
  • the bandwidth of one carrier segment can be arbitrarily configured, but cannot exceed 110 RBs, and the sum of bandwidths of one backward compatible carrier and one or more carrier segments attached to it is no more than 110 RBs.
  • a backward compatible carrier uses the same HARQ entity as one or more carrier segments attached to it, configuring the same transmission mode.
  • the cell feature signal is not transmitted in the carrier segment, including the signals of PSS, SSS, BCH, CRS, etc., and cannot provide UE camping.
  • the PDCCH is not transmitted within the carrier segment, and its physical resources are scheduled by the PDCCH transmitted on the backward compatible carrier.
  • Figure 2 shows an example of binding two carrier segments to a backward compatible carrier, where a PDCCH on a backward compatible carrier can simultaneously schedule itself and any physical resources on two carrier segments for PDSCH or PUSCH transmission.
  • DMRS ports are defined for PDSCH transmission: Ports 7 to 14, supporting up to 8 ports of PDSCH transmission, and the DMRS sequences transmitted on each port also use two different scrambling sequences (Scrambling) Code) is initialized.
  • the two scrambling sequences are SCID 0 and SCID 1, respectively.
  • the physical layer control channel (including PDCCH, PHICH, and PCFICH) is not transmitted on the extended carrier or the carrier segment, and the physical resources on the extended carrier or carrier segment are scheduled by the PDCCH on the backward compatible carrier to which it is attached, so that the backward direction
  • the compatible carrier not only needs to schedule the physical resources of its own carrier, but also needs to schedule the physical resources on the extended carrier and/or carrier fragment bound to it.
  • the workload of the backward compatible carrier for resource scheduling is large, in some cases (such as in When a backward compatible carrier is bound with multiple extension carriers or carrier segments, the PDCCH resources in the backward compatible carrier are limited, and the collision probability is increased.
  • Embodiments of the present invention provide a method, system, and device for transmitting and detecting a physical downlink control channel in a long-term evolution upgrade system, which are used to reduce a workload of a backward compatible carrier to which an extension carrier or a carrier fragment is attached.
  • a physical downlink control channel PDCCH transmission method in a long-term evolution upgrade system includes: determining, by a base station, a physical resource occupied by transmitting a PDCCH on an extended carrier or a carrier fragment, and generating a demodulation for detecting, by the user equipment, the PDCCH Pilot signal DMRS;
  • a PDCCH detection method for a physical downlink control channel in a long-term evolution upgrade system includes: determining, by a user equipment, a physical resource occupied by a base station by transmitting a PDCCH on an extended carrier or a carrier segment, and generating a demodulation pilot signal DMRS;
  • the user equipment detects, on the physical resource, the PDCCH sent by the base station on the extended carrier or carrier segment using the DMRS.
  • a physical downlink control channel PDCCH transmitting device in a long-term evolution upgrade system includes: a determining unit, configured to determine a physical resource occupied by transmitting a PDCCH on an extended carrier or a carrier fragment, and generate the user equipment to detect the Demodulation pilot signal DMRS of PDCCH; And a sending unit, configured to send, by using the physical resource, the PDCCH and the DMRS to the user equipment on the extended carrier or the carrier fragment.
  • a physical downlink control channel PDCCH detecting device in a long-term evolution and upgrade system includes: a determining unit, configured to determine a physical resource occupied by a base station to transmit a PDCCH on an extended carrier or a carrier fragment, and generate a demodulation pilot signal DMRS ;
  • a detecting unit configured to detect, by using the DMRS, the PDCCH sent by the base station on the extended carrier or the carrier slice on the physical resource.
  • a long-term evolution upgrade LTE-A communication system includes:
  • a base station configured to determine a physical resource occupied by transmitting a PDCCH on an extended carrier or a carrier segment, and generate a demodulation pilot signal DMRS for the user equipment to detect the PDCCH; using the physical on the extended carrier or carrier segment
  • the resource sends the PDCCH and the DMRS to the user equipment.
  • a user equipment configured to determine, by the base station, the physical resource occupied by the PDCCH on the extended carrier or the carrier fragment, and generate a DMRS, where the DMRS is used to detect, on the physical resource, the PDCCH sent by the base station on the extended carrier or the carrier fragment.
  • the base station transmits a PDCCH on the extension carrier or the carrier segment to schedule physical resources on the extension carrier or the carrier segment
  • the user equipment uses the DMRS to detect the PDCCH transmitted by the base station on the extension carrier or the carrier segment. It can be seen that, by using the present invention, the physical resources on the extended carrier or carrier segment are scheduled by the PDCCH transmitted on itself, and the backward compatible carrier does not need to schedule the physical resources on the extended carrier and/or carrier segment bound to it. The workload of the backward compatible carrier to which the extension carrier or carrier segment is attached is reduced.
  • FIG. 1 is a schematic diagram of an extended carrier in the background art
  • FIG. 2 is a schematic diagram of a carrier segment in the background art
  • FIG. 3 is a schematic flowchart of a method according to an embodiment of the present disclosure.
  • FIG. 5A is a schematic diagram of PDCCH and PDSCH TTDM on an extended carrier according to an embodiment of the present invention
  • FIG. 5B is a schematic diagram of PDCCH and PDSCH F FDM on an extended carrier according to an embodiment of the present invention
  • FIG. 6 is a schematic structural diagram of a system according to an embodiment of the present invention
  • FIG. 6 is a schematic diagram of a system structure according to an embodiment of the present invention
  • FIG. 7 is a schematic structural diagram of a device according to an embodiment of the present disclosure.
  • FIG. 8 is a schematic structural diagram of a device according to an embodiment of the present invention.
  • the base The PDCCH is transmitted on the extension carrier or the carrier segment to schedule physical resources on the extension carrier or the carrier segment, and the user equipment uses the DMRS to detect the PDCCH transmitted by the base station on the extension carrier or the carrier segment.
  • a PDCCH sending method in a long-term evolution upgrade system includes the following steps:
  • Step 30 The base station determines to transmit the physical resource occupied by the PDCCH on the extended carrier or the carrier fragment, and generates a DMRS for detecting, by the user equipment, the PDCCH.
  • Step 31 The base station sends the PDCCH and the DMRS to the user equipment by using the determined physical resource on the extended carrier or the carrier fragment.
  • step 31 the base station sends the PDCCH and the DMRS to the user equipment by using the determined physical resource on the extended carrier or the carrier fragment through one or more downlink dedicated pilot ports.
  • the base station can pass the radio resource control (RRC).
  • RRC radio resource control
  • the signaling is used to send the number of downlink dedicated pilot ports to the user equipment.
  • the number of downlink dedicated pilot ports and the number of the downlink dedicated pilot port are sent to the user equipment by using high layer RRC signaling.
  • the downlink dedicated pilot port is: a downlink DMRS port defined in the LTE system version 10.
  • the dedicated dedicated pilot port is: a DMRS port used for transmitting the PDSCH on the extension carrier or the carrier fragment.
  • the base station In step 30, the base station generates a DMRS for the user equipment to detect the PDCCH according to the preset scrambling sequence.
  • the base station sends the information of the scrambling sequence to the user equipment by using the high layer RRC signaling before transmitting the PDCCH and the DMRS to the user equipment on the extended carrier or the carrier segment.
  • the base station can use the radio network Temporary Identity (RNTI) of the user equipment to add the PDCCH to the PDCCH before the PDCCH and the DMRS are sent to the user equipment by using the physical resource.
  • RNTI radio network Temporary Identity
  • the PDCCH is transmitted on a spreading carrier or a carrier segment in units of resource blocks.
  • the PDCCH transmitted by the base station on the extension carrier or the carrier fragment and the PDSCH transmitted on the extension carrier or the carrier fragment are time division multiplexed (TDM) or frequency division multiplex (FDM). Or TDM plus FDM mode.
  • the base station may send the start position information of the OFDM symbol occupied by the PDSCH before transmitting the PDCCH and the DMRS to the user equipment by using the physical resource on the extended carrier or the carrier fragment.
  • OFDM Orthogonal Frequency Division Multiplexing
  • the PDCCH and the PDSCH occupy different RBs in the frequency domain.
  • the base station may send downlink resource scheduling signaling in the first N1 OFDM symbols of the subframe, and send uplink resource scheduling signaling in the last N2 OFDM symbols of the subframe, where N1 is greater than 0 and smaller than the OFDM symbol included in the subframe.
  • the total number of integers N; N2 is an integer greater than 0 and not greater than N-N1. For example, N1 has a value of 7 and N2 has a value of 7.
  • the PDCCH transmitted by the base station on the extension carrier or the carrier fragment and the PDSCH transmitted on the extension carrier or the carrier fragment are in the TDM plus FDM mode, and are in the RB occupied by the PDCCH, and in the same subframe, the PDCCH If the OFDM symbol preceding the OFDM symbol occupied by the PDSCH is occupied, the starting position of the OFDM symbol occupied by the PDSCH in the RB occupied by the PDCCH before the PDCCH and the DMRS are transmitted to the user equipment using the physical resource on the extended carrier or the carrier fragment The information is sent to the user device.
  • the base station may send the start location information of the OFDM symbol occupied by the PDSCH to the user equipment by using the PCFICH or the high layer RRC signaling.
  • the base station may determine the number of RBs to be occupied according to the transmission code rate of the transmission PDCCH, and select the same number of RBs as the extension carrier or carrier segment in the specific frequency domain set within the system bandwidth.
  • the frequency domain resource occupied by the PDCCH is transmitted.
  • the number of required resource elements (Resource Element, RE) may be determined according to the transmission code rate of the transmitted PDCCH, and then according to the REs included in each RB.
  • the number determines the number of RBs that need to be occupied.
  • the specific frequency domain set is specified by the protocol or sent by the base station to the user equipment through the high layer RRC signaling.
  • an embodiment of the present invention further provides a PDCCH detection method in a long-term evolution upgrade system, which specifically includes the following steps:
  • Step 40 The user equipment determines that the base station sends the physical resources occupied by the PDCCH on the extended carrier or the carrier fragment, and generates a DMRS sequence.
  • Step 41 The user equipment detects, on the physical resource, the PDCCH sent by the base station on the extended carrier or the carrier fragment by using the DMRS sequence.
  • the user equipment may first determine a downlink dedicated pilot port used by the base station to transmit the PDCCH on the extended carrier or the carrier fragment; then, the user equipment uses the DMRS on the physical resource to detect the base station in the extended carrier on the downlink dedicated pilot port. Or the PDCCH transmitted on the carrier segment.
  • the user equipment determines the downlink dedicated pilot port used by the base station to send the PDCCH, and specifically adopts the following two methods:
  • the first type the user equipment determines the number of downlink dedicated pilot ports used by the base station to send the PDCCH according to the high layer RRC signaling sent by the base station, and determines the downlink dedicated guide according to the corresponding relationship between the preset number of ports and the port number.
  • the downlink dedicated pilot port number corresponding to the number of the frequency port, and the downlink dedicated pilot port corresponding to the downlink dedicated pilot port number is determined as a downlink dedicated pilot port used by the base station to transmit the PDCCH on the extended carrier or the carrier segment;
  • the user equipment determines, according to the high layer RRC signaling sent by the base station, the downlink used by the base station to send the PDCCH.
  • the dedicated pilot port number determines the downlink dedicated pilot port corresponding to the downlink dedicated pilot port number as the downlink dedicated pilot port used by the base station to transmit the PDCCH on the extension carrier or the carrier segment.
  • the downlink dedicated pilot port is: a downlink DMRS port defined in the LTE system version 10.
  • the dedicated dedicated pilot port is: a DMRS port used for transmitting the PDSCH on the extension carrier or the carrier fragment.
  • step 40 the user equipment generates a DMRS sequence according to a preset Scrambling Code or a Scrambling Code configured by the base station through high layer RRC signaling.
  • step 41 the user equipment detects the PDCCH transmitted by the base station on the extension carrier or the carrier fragment by using the DMRS sequence and the RNTI of the user equipment on the physical resource.
  • step 41 the user equipment detects, on the physical resource, the PDCCH sent by the base station on the extension carrier or the carrier fragment in units of RBs.
  • the PDCCH transmitted by the base station on the extended carrier or carrier segment and the PDSCH transmitted by the base station on the extended carrier or carrier segment are in TDM mode, or FDM mode, or TDM plus FDM mode.
  • the PDCCH transmitted by the base station on the extension carrier or the carrier fragment and the PDSCH transmitted on the extension carrier or the carrier fragment are in the TDM manner and are in the same subframe, the PDCCH occupies the OFDM symbol before the OFDM symbol occupied by the PDSCH, then the step The user equipment in 40 determines that the physical resources occupied by the base station to transmit the PDCCH on the extended carrier or the carrier fragment include:
  • the OFDM symbol occupied by the PDCCH on the extended carrier or the carrier segment the OFDM symbol is located before the OFDM symbol occupied by the PDSCH, according to the starting location information of the OFDM symbol occupied by the PDSCH sent by the received base station,
  • the user equipment receives the PDCCH in the OFDM symbol preceding the start symbol occupied by the PDSCH in one subframe.
  • the user equipment performs blind detection on the PDCCH in units of RBs.
  • the user equipment may detect DL Grant signaling in the first N1 OFDM symbols of the subframe, and detect UL Grant signaling in the last N2 OFDM symbols of the subframe, where N1 is greater than 0 and smaller than that included in the subframe.
  • N1 is greater than 0 and smaller than that included in the subframe.
  • An integer of the total number N of OFDM symbols, N2 being an integer greater than 0 and not greater than N-N1.
  • the value of N1 is 7, and the value of N2 is 7.
  • the PDCCH and the PDSCH transmitted on the extended carrier or the carrier fragment are in the TDM plus FDM mode, and are in the RB occupied by the PDCCH, and in the same subframe, the PDCCH occupies the OFDM symbol before the OFDM symbol occupied by the PDSCH, then the step
  • the user equipment in 40 determines that the physical resources occupied by the base station to transmit the PDCCH on the extended carrier or the carrier fragment include:
  • the OFDM symbol occupied by the base station transmitting the PDCCH on the extended carrier or the carrier fragment according to the starting location information of the OFDM symbol occupied by the PDSCH in the RB occupied by the PDCCH, and the OFDM symbol is located at the PDSCH Occupied before the OFDM symbol.
  • the user equipment is within the RB occupied by the PDCCH.
  • the OFDM symbol preceding the start OFDM symbol occupied by the PDSCH in one subframe receives the PDCCH.
  • the user equipment receives the start position information of the OFDM symbol occupied by the PDSCH by using the PCFICH or the high layer RRC signaling sent by the base station.
  • the user equipment may perform blind detection of the PDCCH and receive the corresponding PDCCH in a specific frequency domain RB set.
  • the specific frequency domain set is known by the protocol or according to the high layer RRC signaling sent by the base station.
  • the present invention proposes that the PDCCH is transmitted on the extension carrier and demodulated by the dedicated pilot DMRS, and the extension carrier can schedule its physical resources through its own PDCCH. among them:
  • the PDCCH on the extended carrier is transmitted on the downlink dedicated pilot port, which may be one or more DMRS ports (Ports) defined by Rel-10.
  • the PDCCH uses single port transmission, and one of the downlink DMRS ports (ports 7, 8, 9, 10, ..., 14) defined in Rel-10, such as Port 7.
  • Port 7 If the PDCCH is transmitted using two antenna ports, it is transmitted in two of the above DMRS ports, for example, Port 7, 8.
  • the PDCCH is transmitted using a four-antenna port, it is transmitted in four of the above DMRS ports, such as Port 7, 8, 9, 10.
  • the number of antenna ports used to transmit the PDCCH on the extension carrier is configured by the upper layer RRC signaling.
  • the specifically used antenna port can be fixed according to the number of antenna ports used, as described in the example of 1 or configured by the base station through high layer RRC signaling.
  • the Scrambling ID (SCID) used to transmit the PDCCH on the extension carrier can be fixed to 0 or 1 or configured by higher layer RRC signaling.
  • the PDCCH for the user sent on the extended carrier has the following relationship with the DMRS port of the PDSCH:
  • the PDCCH may be transmitted on one or more of the DMRS ports used by the PDSCH, for example, the PDSCH uses ports 7 and 8 for transmission, and the PDCCH uses port 7 for transmission.
  • the PDCCH transmitted on the extended carrier may be only the UE-specific PDCCH, and is scrambled by the RNTI of the target UE.
  • the PDCCH transmitted on the extension carrier is transmitted in units of RBs, and the resource element group (REG) level is not interleaved.
  • REG resource element group
  • the multiplexing relationship between the PDCCH and the PDSCH may be TDM, that is, the PDCCH occupies the OFDM symbol transmission before the PDSCH in the entire system bandwidth, as shown in FIG. 5A.
  • the initial OFDM symbol of the PDSCH may be indicated by the PCFICH in the subframe, or may not be transmitted by the PCFICH, and the PDSCH starting position on the Extension Carrier is indicated by the high layer RRC signal.
  • the transmission resource of the PDCCH is N OFDM symbols in the time domain (PCFICH or high layer signaling configuration) and M RBs in the frequency domain. According to different transmission code rates, one PDCCH occupies one or more RBs, and the UE is within the resource. PDCCH is blinded by RB.
  • the PDCCH PDCCH blind detection may be performed in the frequency domain of the UE in advance by the protocol, or may be notified to the UE in advance by the base station.
  • the multiplexing relationship between the PDCCH and the PDSCH on the extended carrier may also be FDM, that is, the PDCCH occupies all OFDM symbols in one subframe and occupies different RBs from the PDSCH, as shown in FIG. 5B.
  • the PDCCH resource is all OFDM symbols in the time domain and M1 RBs in the frequency domain.
  • one PDCCH occupies one or more RBs, and the UE performs PDCCH blindness in units of RBs in the resource. Check.
  • the UL grant can be sent in the entire subframe or in the next N2 OFDM symbols, for example, the UL grant is in the second slot.
  • the PDCCH PDCCH blind detection may be performed in the frequency domain of the UE in advance by the protocol, or may be notified to the UE in advance by the base station.
  • the start position of the PDSCH may be indicated by the PCFICH or indicated by the base station through the upper layer RRC signaling.
  • one PDCCH occupies one or more RBs, and the UE performs PDCCH blind detection in units of RBs in the resource.
  • the PDCCH PDCCH blind detection may be performed in the frequency domain of the UE in advance by the protocol, or may be notified to the UE in advance by the base station.
  • the system and the device are also provided in the embodiment of the present invention. Since the principle of solving the problem is similar to the method in the embodiment of the present invention, the implementation of the device can refer to the implementation of the method, and the repetition is no longer Narration.
  • an embodiment of the present invention further provides an LTE-A communication system, where the system includes:
  • the base station 60 is configured to determine a physical resource occupied by the PDCCH on the extended carrier or the carrier segment, and generate a DMRS for the user equipment to detect the PDCCH. On the extended carrier or the carrier segment, use the physical resource to send the PDCCH and the DMRS to the user equipment. .
  • the user equipment 61 is configured to determine, by the base station, the physical resource occupied by the PDCCH on the extended carrier or the carrier fragment, and generate a DMRS sequence, and use the DMRS sequence on the physical resource to detect the PDCCH sent by the base station on the extended carrier or the carrier fragment.
  • an embodiment of the present invention further provides a PDCCH sending device in a long-term evolution upgrade system, where the device includes:
  • the first determining unit 70 is configured to determine, by using the extended carrier or the carrier segment, the physical resource occupied by the PDCCH, and generate a DMRS for the user equipment to detect the PDCCH.
  • the sending unit 71 is configured to send, on the extended carrier or the carrier segment, the determined physical resource to the user equipment. PDCCH and DMRS.
  • the sending unit 71 is used to:
  • the PDCCH and the DMRS are transmitted to the user equipment by using the transmitted unit physical resource on the extended carrier or the carrier fragment through one or more downlink dedicated pilot ports.
  • the device also includes:
  • the first configuration unit 72 is configured to: after the PDCCH and the DMRS are sent to the user equipment by using physical resources on the extended carrier or the carrier segment by using one or more downlink dedicated pilot ports, control the RRC signaling by the high layer radio resource, and then downlink The number of dedicated pilot ports is sent to the user equipment; or
  • the number of downlink dedicated pilot ports and the number of downlink dedicated pilot ports are transmitted to the user equipment through high layer RRC signaling.
  • the first determining unit 70 is configured to:
  • a DMRS for the user equipment to detect the PDCCH is generated according to a preset Scrambling Code.
  • the device also includes:
  • the second configuration unit 73 is configured to send, by using the high layer RRC signaling, the information of the scrambling sequence to the user equipment, before using the physical resource to send the PDCCH and the DMRS to the user equipment on the extended carrier or the carrier segment.
  • the sending unit 71 is also used to:
  • the PDCCH is added to the PDCCH by using the RNTI of the user equipment before the PDCCH and the DMRS are transmitted to the user equipment by using the physical resource.
  • the sending unit 71 is used to:
  • the PDCCH is transmitted in units of RBs on the extension carrier or carrier segment.
  • the device also includes:
  • a third configuration unit 74 configured to use the TDM mode in the PDCCH and the PDSCH transmitted on the extension carrier or the carrier fragment, and in the same subframe, when the PDCCH occupies an OFDM symbol before the OFDM symbol occupied by the PDSCH, in the extended carrier On the carrier segment, before the PDCCH and the DMRS are sent to the user equipment by using the physical resource, the start location information of the OFDM symbol occupied by the PDSCH is sent to the user equipment.
  • the PDCCH and the PDSCH transmitted on the extension carrier or the carrier fragment are in the FDM mode, the PDCCH and the PDSCH occupy different RBs in the frequency domain.
  • the sending unit 71 is used to:
  • N1 is greater than 0 and less than the total number of OFDM symbols included in the subframe.
  • N2 is an integer greater than 0 and no greater than N-N1.
  • N1 is 7, and the value of N2 is 7.
  • the device also includes:
  • the fourth configuration unit 75 is configured to use the TDM plus FDM mode in the PDCCH and the PDSCH transmitted on the extended carrier or the carrier segment, and in the RB occupied by the PDCCH, in the same subframe, the PDCCH occupies the OFDM symbol occupied by the PDSCH In the case of the previous OFDM symbol, before the PDCCH and the DMRS are transmitted to the user equipment using the physical resource, the start position information of the OFDM symbol occupied by the PDSCH in the RB occupied by the PDCCH is transmitted to the user equipment.
  • the third configuration unit 74 or the fourth configuration unit 75 is used to:
  • the start location information of the OFDM symbol occupied by the PDSCH is sent to the user equipment by using the PCFICH or the upper layer RRC signaling.
  • the first determining unit 70 is configured to:
  • the number of RBs to be occupied is determined according to the transmission code rate of the transmission PDCCH, and the number of RBs is selected as a frequency domain resource used for transmitting the PDCCH on the extension carrier or the carrier fragment in a specific frequency domain set within the system bandwidth.
  • the specific frequency domain set is sent to the user equipment through protocol or through high layer RRC signaling.
  • an embodiment of the present invention further provides a PDCCH detection device in a long-term evolution upgrade system, where the device includes:
  • a second determining unit 80 configured to determine, by the base station, a physical resource that is used by the PDCCH to transmit the PDCCH on the extended carrier or the carrier segment, and generate a DMRS sequence
  • the detecting unit 81 is configured to detect, by using the DMRS sequence, the PDCCH sent by the base station on the extended carrier or the carrier fragment on the determined physical resource.
  • the detecting unit 81 is used for:
  • the detecting unit 81 is used for:
  • a downlink dedicated pilot port number where the downlink dedicated pilot port corresponding to the downlink dedicated pilot port number is determined as a downlink dedicated pilot port used by the base station to transmit the PDCCH on the extended carrier or the carrier segment;
  • the downlink dedicated pilot port used by the base station to transmit the PDCCH is determined according to the high layer RRC signaling sent by the base station.
  • the second determining unit 80 is configured to:
  • the DMRS sequence is generated according to a preset Scrambling Code or a scrambling sequence configured by the base station through high layer RRC signaling.
  • the detecting unit 81 is used for:
  • the DMRS sequence and the RNTI of the device are used to detect that the base station is on the extended carrier or carrier segment.
  • the PDCCH sent.
  • the detecting unit 81 is used for:
  • the PDCCH transmitted by the base station on the extension carrier or the carrier fragment is detected on the physical resource in units of RBs.
  • the second determining unit 80 is configured to:
  • the PDCCH and the PDSCH transmitted on the extension carrier or the carrier segment are in the TDM mode, and the PDCCH occupies the OFDM symbol before the OFDM symbol occupied by the PDSCH in the same subframe, according to the PDSCH transmitted by the received base station
  • the start position information of the OFDM symbol determines the OFDM symbol occupied by the base station transmitting the PDCCH on the extension carrier or the carrier fragment, and the OFDM symbol is located before the OFDM symbol occupied by the PDSCH.
  • the detecting unit 81 is used for:
  • N1 is an integer greater than 0 and less than the total number N of OFDM symbols included in the subframe
  • N2 is an integer greater than 0 and not greater than N-N1.
  • N1 is 7, and the value of N2 is 7.
  • the second determining unit 80 is configured to:
  • the TDM plus FDM mode and in the RB occupied by the PDCCH, in the same subframe, when the PDCCH occupies the OFDM symbol before the OFDM symbol occupied by the PDSCH, according to the reception
  • the start location information of the OFDM symbol occupied by the PDSCH in the RB occupied by the PDCCH, the OFDM symbol occupied by the base station transmitting the PDCCH on the extended carrier or the carrier fragment, and the PDCCH occupied in the RB occupied by the PDCCH The OFDM symbol preceding the OFDM symbol occupied by the PDSCH.
  • the second determining unit 80 is configured to: pass the PCFICH or the upper layer RRC signaling sent by the base station,
  • the start position information of the OFDM symbol occupied by the PDSCH is received.
  • the PDCCH sending device in the long-term evolution upgrade system provided by the embodiment of the present invention may specifically be a base station.
  • the PDCCH detecting device in the long-term performance upgrade system may specifically be a user equipment.
  • the beneficial effects of the present invention include:
  • the base station sends a PDCCH on the extended carrier or the carrier segment to schedule the physical resource on the extended carrier or the carrier segment
  • the user equipment uses the DMRS to detect the PDCCH transmitted by the base station on the extended carrier or the carrier segment.
  • the computer program instructions can also be stored in a computer readable memory that can direct a computer or other programmable data processing device to operate in a particular manner, such that the instructions stored in the computer readable memory produce an article of manufacture comprising the instruction device.
  • the apparatus implements the functions specified in one or more blocks of a flow or a flow and/or block diagram of the flowchart.
  • These computer program instructions can also be loaded onto a computer or other programmable data processing device such that a series of operational steps are performed on a computer or other programmable device to produce computer-implemented processing for execution on a computer or other programmable device.
  • the instructions provide steps for implementing the functions specified in one or more of the flow or in a block or blocks of a flow diagram.

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

Abstract

L'invention porte sur un procédé, un système et un dispositif de transmission et de détection d'un canal de commande de liaison descendante physique (PDCCH) dans un système d'évolution à long terme avancé, qui concernent le domaine technique des communications sans fil et sont utilisés pour réduire la charge de travail d'une porteuse susceptible d'être autonome à laquelle une porteuse d'extension ou des segments de porteuse sont rattachés. Selon la présente invention, une station de base envoie un PDCCH sur une porteuse d'extension ou des segments de porteuse afin de planifier des ressources physiques sur la porteuse d'extension ou les segments de porteuse, et un équipement utilisateur utilise un signal pilote de démodulation (DMRS) pour détecter le PDCCH envoyé sur la porteuse d'extension ou les segments de porteuse par la station de base. En conséquence, selon la présente invention, les ressources physiques sur la porteuse d'extension ou les segments de porteuse sont planifiées par le PDCCH envoyé sur la porteuse d'extension ou les segments de porteuse, et il n'est pas nécessaire que la porteuse susceptible d'être autonome planifie les ressources physiques sur la porteuse d'extension et/ou les segments de porteuse liés à la porteuse susceptible d'être autonome, ce qui réduit la charge de travail de la porteuse susceptible d'être autonome à laquelle la porteuse d'extension ou les segments de porteuse sont rattachés.
PCT/CN2011/082024 2010-12-24 2011-11-10 Procédé, système et dispositif de transmission et de détection de canal de commande de liaison descendante physique WO2012083766A1 (fr)

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