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WO2012071899A1 - Procédé et système d'acquisition d'informations de commande de liaison descendante dans une sous-trame mbsfn - Google Patents

Procédé et système d'acquisition d'informations de commande de liaison descendante dans une sous-trame mbsfn Download PDF

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Publication number
WO2012071899A1
WO2012071899A1 PCT/CN2011/077666 CN2011077666W WO2012071899A1 WO 2012071899 A1 WO2012071899 A1 WO 2012071899A1 CN 2011077666 W CN2011077666 W CN 2011077666W WO 2012071899 A1 WO2012071899 A1 WO 2012071899A1
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Prior art keywords
mode
port
transmission
downlink transmission
downlink
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PCT/CN2011/077666
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English (en)
Chinese (zh)
Inventor
吴欣
戴博
左志松
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ZTE Corp
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ZTE Corp
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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
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W76/00—Connection management
    • H04W76/40—Connection management for selective distribution or broadcast

Definitions

  • the present invention relates to an advanced LTE (LTE-Advance) system technology, and more particularly to a method and system for obtaining downlink control information in an MBSFN subframe.
  • LTE-Advance LTE-Advance
  • Radio frame (RF) in the Long Term Evolution (LTE) system includes a frame structure of a Frequency Division Duplex (FDD) mode and a Time Division Duplex (TDDD) mode.
  • FDD Frequency Division Duplex
  • TDDD Time Division Duplex
  • FIG. 1 is a schematic diagram of a frame structure of an FDD mode.
  • a 10 millisecond (ms) radio frame is composed of twenty slots of length 0.5 ms and numbers 0 to 19, and slots 2i and 2i+l constitutes a subframe (frame) i of length 1 ms.
  • FIG. 2 is a schematic diagram of a frame structure of a TDD mode. As shown in FIG. 2, a 10 ms radio frame is composed of two half frames of 5 ms length, and one field includes five subframes of length 1 ms. Frame i is defined as two time slots 2i and 2i+1 that are 0.5 ms long.
  • a time slot contains 7 symbols of length 66.7 microseconds (us), where the cyclic prefix (CP) of the first symbol is 5.21us long, and the remaining 6 symbols are 4.69 us long; Extended Cyclic Prefix (Extended CP, Extended Cyclic Prefix), one slot contains 6 symbols, and the CP length of all symbols is 16.67 us.
  • the version number of LTE corresponds to R8 (Release 8), and the version number corresponding to the added version is R9.
  • LTE-Advance Advanced LTE
  • PCFICH Physical Downlink Control Format Indicator Channel
  • OFDM Orthogonal Frequency Division Multiplexing
  • the number of PHICHs and the time-frequency location may be determined by system messages and cell IDs in a physical broadcast channel (PBCH, Physical Broadcast Channel) of the downlink carrier where the PHICH is located;
  • PBCH Physical Broadcast Channel
  • a physical downlink control channel (PDCCH) is used to carry downlink control information (DCI, Downlink Control Information), and includes: uplink and downlink scheduling information, and uplink power control information.
  • DCI downlink control information
  • Downlink Control Information Downlink Control Information
  • DCI format is divided into the following types: DCI formatO, DCI format 1, DCI format 1A, DCI format 1B, DCI format 1C, DCI format 1D, DCI format2, DCI format 2A, DCI format3, and DCI format 3 A, etc.;
  • DCI format 0 is used to indicate scheduling of a Physical Uplink Shared Channel (PUSCH);
  • DCI format 1 is used for different modes of codeword scheduling of a physical downlink shared channel (PDSCH);
  • PDSCH physical downlink shared channel
  • DCI format2, DCI format 2A, DCI format 2B are used for different modes of space division multiplexing; DCI format3, DCI format 3A is used for physical uplink control channel (PUCCH, Physical
  • Uplink Control Channel Uplink Control Channel
  • PUSCH power control commands are different modes.
  • the physical resources transmitted by the physical downlink control channel (PDCCH) are in units of control channel elements (CCEs), and the size of one CCE is 9 resource element groups (REG,
  • the PDCCH may occupy 1, 2, 4 or 8 CCEs.
  • a tree aggregation (Aggregation) is adopted, that is, a PDCCH occupying one CCE can start from an arbitrary CCE position; a PDCCH occupying two CCEs is from an even number The CCE position starts; the PDCCH occupying 4 CCEs starts from the CCE position which is an integer multiple of 4; the PDCCH occupying 8 CCEs starts from the CCE position which is an integral multiple of 8.
  • Each aggregation level defines a search space (Search space), including the common (common) search space and the user equipment (UE, User Equipment) proprietary (UE-Specific) search space.
  • the number of CCEs in the entire search space is determined by the number of OFDM symbols and the number of groups of PHICHs occupied by the control region indicated by the PCFICH in each downlink subframe.
  • the UE blindly detects all possible PDCCH code rates in the search space according to the DCI format of the transmission mode.
  • the UE is semi-statically set by the higher layer signaling to receive the PDSCH data transmission according to the indication of the PDCCH of the user equipment specific (UE-Specific) search space based on one of the following transmission modes. :
  • Mode 1 Single antenna port; Port 0 ( Single-antenna port; port 0 );
  • Mode 2 Transmit diversity ;
  • Mode 3 Open-loop spatial multiplexing
  • Mode 5 Multi-user Multiple Input Multiple Output (Multi-user MIMO);
  • Mode 7 Single antenna port; Port 5 (Single-antenna port; port 5).
  • the UE should perform PDCCH decoding.
  • the PDCCH and all associated PDSCHs are decoded according to the respective combinations defined in Table 1.
  • DCI format 2A open loop spatial multiplexing or transmission diversity
  • DCI format 2 closed-loop spatial multiplexing or transmission diversity
  • the UE is set by the upper layer to: PDCCH decoded by the CRC of the semi-persistently scheduled Cell Radio Network Temporary Identifier (SPS C-RNTI, Semi-persistently Scheduled Cell Radio Network Temporary Identifier), the UE shall be as defined in Table 2. Corresponding combinations to decode the PDCCH and all associated PDSCHs.
  • SPS C-RNTI Semi-persistently Scheduled Cell Radio Network Temporary Identifier
  • Multi-Cell Multimedia Broadcast and Multicast Service is implemented by combining multiple cells, that is, transmitting MBMS signals through multiple cells synchronized with each other, and then naturally in the air.
  • the combination of multiple cell signals is formed.
  • This combination is called the single frequency network (SFN) merge because it occurs on the same frequency.
  • SFN single frequency network
  • This combined transmission does not require any additional complexity to receive the multi-cell MBMS signal at the UE side, and only needs to be received in accordance with the method of receiving the unicast signal.
  • SFN single frequency network
  • This combined transmission does not require any additional complexity to receive the multi-cell MBMS signal at the UE side, and only needs to be received in accordance with the method of receiving the unicast signal.
  • SFN single frequency network
  • the normal CP (Normal CP) is designed under the unicast system.
  • the signal sent by the eNodeB of the cell is regarded as a useful signal, and the signal of the neighboring cell is regarded as interference.
  • the length of the CP only needs to cover more than one cell.
  • the path delay can be extended.
  • the signals sent by the eNodeBs of multiple cells are regarded as useful signals. In this case, The CP needs to cover the delay spread of multiple cell signals, so there will be a longer demand for the CP.
  • the MBSFN channel is transmitted in the LTE system using a dedicated Physical Multicast Channel (PMCH).
  • PMCH Physical Multicast Channel
  • the multicast service on the MBSDN subframe cannot detect downlink control information.
  • the LTE-A UE-specific PDSCH can be transmitted on the MBSFN subframe.
  • the PDSCH demodulation is performed by using a Cell-specific reference signal (CRS), and when the LTE-A UE is in the subframe of the MBSFN.
  • CRS Cell-specific reference signal
  • the downlink control information cannot be obtained at present, and thus the demodulation of the PDSCH cannot be performed.
  • the main object of the present invention is to provide a method and a system for acquiring downlink control information in an MBSFN subframe, which can acquire downlink control information, thereby implementing an LTE-A UE dedicated MBSFN subframe in the LTE-Advance system. Demodulation of the PDSCH.
  • a method for obtaining downlink control information in an MBSFN subframe includes:
  • the base station sends the downlink control information to the user equipment according to the determined downlink transmission mode; the user equipment performs the downlink transmission mode according to the determined downlink transmission mode on the single frequency network multicast/broadcast MBSFN subframe.
  • the downlink control information format in the formula acquires downlink control information.
  • the MBSFN subframe is a dedicated subframe of the physical downlink shared channel PDSCH transmission of the LTE-A user equipment of the advanced long-term evolution LTE-Advance system.
  • a system for obtaining downlink control information in an MBSFN subframe includes at least a base station and a user equipment, where
  • a base station configured to send downlink control information to the user equipment according to the determined downlink transmission mode
  • the user equipment is configured to acquire the downlink control information according to the corresponding downlink control information format in the determined downlink transmission mode on the MBSFN subframe.
  • the base station sends the downlink control information to the user equipment according to the determined downlink transmission mode, where the downlink transmission mode is set in the LTE-A UE dedicated MBSFN sub-category of the LTE-Advance system.
  • the user equipment acquires downlink control information according to the corresponding downlink control information format in the determined downlink transmission mode on the MBSFN subframe.
  • the present invention provides a solution to the problem of how to obtain downlink control information, and then perform PDSCH demodulation and how to configure the downlink transmission mode in the MBSFN subframe in the R10 version of the LTE-Advance.
  • the downlink control information in the MBSFN subframe is obtained, thereby ensuring the demodulation of the PDSCH in the MBSFN subframe dedicated to the LTE-A UE of the LTE-Advance system.
  • Figure 1 is a schematic diagram of a frame structure of an FDD mode
  • FIG. 2 is a schematic diagram of a frame structure of a TDD mode
  • FIG. 3 is a flowchart of a method for acquiring downlink control information in an MBSFN subframe according to the present invention
  • FIG. 4 is a schematic diagram of a system for acquiring downlink control information in an MBSFN subframe according to the present invention
  • FIG. 5 is a schematic diagram of a truncated CRS on an MBSFN subframe. Schematic. detailed description
  • FIG. 3 is a flowchart of a method for obtaining downlink control information in an MBSFN subframe according to the present invention. As shown in FIG. 3, the method includes the following steps:
  • Step 300 The base station sends downlink control information to the user equipment (UE) according to the determined downlink transmission mode.
  • the method for determining the downlink transmission mode in this step includes: after the high layer (such as the base station) is configured, the UE is notified by the high layer signaling; or, the setting is performed by a preset method. specifically,
  • the downlink transmission mode on the MBSFN subframe is configured by the higher layer, including: selecting k modes from the n modes, and then selecting one of the k modes by the high layer signaling; wherein n is the mode 1 to mode 9 of the downlink transmission , k is an integer and lk 9.
  • the downlink transmission mode on the MBSFN subframe is preset: the preset downlink transmission mode is a fixed downlink transmission mode X, where X is an integer and 7 X 9, or X is an integer and 1 X 6.
  • the preset downlink transmission mode only indicates DCI Format 1A for single antenna port transmission, where the single antenna port is a fixed port, and the preferred port value is port 7 or port 5.
  • the downlink transmission mode on the MBSFN is the same mode a; wherein the mode a is the mode, one of the modes ;
  • the downlink transmission mode on the MBSFN is configured by the upper layer: k modes are selected from the n modes, and then one of the k modes is selected by the high layer signaling, where n is the downlink transmission mode 1 to mode 9, k is an integer and 1 k 9; or, the downlink transmission mode is set in advance, and the preset downlink transmission mode is a fixed downlink transmission mode X, where X is an integer and 7 X, or X is an integer and 1 X 6; or, the downlink transmission mode is set in advance, where the preset downlink transmission mode is DCI Format 1A for single antenna port transmission, where the single antenna port is fixed. Port, the port Is port 7 or port 5; where mode b is one of modes 1 to 6;
  • mode c When the mode configured by the base station to the UE is mode c, the UE does not transmit the PDSCH on the MBSFN subframe, or the base station does not transmit the PDSCH, or the UE does not perform the detection of the DCI format related to the PDSCH scheduling, and when the UE is configured as a mode.
  • d the UE has a PDSCH transmission on the MBSFN subframe, or the base station transmits the PDSCH, or the UE performs the detection of the DCI format related to the PDSCH scheduling.
  • mode c is one of modes 1 ⁇ 6, mode d is one of modes 7 ⁇ 9; or mode c is one of modes 1 ⁇ 8, and mode d is mode 9.
  • the base station When the mode configured by the base station to the UE is mode e, the downlink transmission mode on the MBSFN is the same mode e, and the common reference signal is transmitted only on the physical resource block that needs the shared reference signal for demodulation.
  • mode e is one of mode 1 to mode 9.
  • the base station transmits the public reference signal on the physical resource block of the UE that needs to configure the public reference signal.
  • Step 301 The user equipment acquires the downlink control information according to the downlink control information format corresponding to the determined downlink transmission mode on the MBSFN subframe.
  • the MBSFN subframe is a dedicated subframe of PDSCH transmission of the LTE-A UE of the LTE-Advance system.
  • the method includes: in the downlink control information in the determined downlink transmission mode, when the cyclic check code in the downlink control channel is scrambled by the temporary identifier of the cell radio network, the temporary identifier in the public search space and the cell radio network (C- In the UE-specific search space defined by RNTI, the DCI Format 1 A indicates single-antenna port transmission under the MBSFN subframe, port Y; and in the non-MBSFN subframe, if the physical broadcast channel (PBCH, Physical Broadcast Channel) The number of antenna ports is 1, and the single antenna port is used for transmission, port Z; otherwise, transmission diversity transmission is used.
  • PBCH Physical Broadcast Channel
  • DCI format 1 is used to indicate single-antenna port transmission, and the antenna port is 5.
  • the value of the determined downlink transmission mode can be selected as mode 7, and antenna port Y and port Z can be selected as port 5 and port 0, respectively.
  • D Use DCI Format 1A to represent a single antenna under MBSFN subframes Port transmission, port Y; In non-MBSFN subframes, if the number of PBCH antenna ports is 1, use single antenna port transmission, port ⁇ ; otherwise, use transmission diversity transmission.
  • DCI format 2B is used to indicate double layer transmission, the antenna port is port 7 and port 8, or single layer transmission, and the antenna port is port 7 or port 8. The value of the determined downlink transmission mode may be selected as mode 8, and the antenna port Y and the port Z may be selected as port 7 and port 0, respectively.
  • the cyclic check code in the downlink control channel is scrambled by the cell radio network temporary identifier, in the public search space and the UE-specific search space defined by the C-RNTI , using DCI Format 1A to indicate single antenna port transmission under MBSFN subframe, port Y; and in non-MBSFN subframe, if the number of PBCH antenna ports is 1, use single antenna port transmission, port Z; otherwise, use Transfer diversity transmission.
  • DCI Format 2C is used to indicate up to 8 layers of transmission, and the antenna port is one of ports 7-14.
  • the value of the determined downlink transmission mode can be selected as mode 9, and antenna port Y and port Z can be selected as port 7 and port 0, respectively.
  • the present invention proposes a solution to how to obtain downlink control information, and then perform PDSCH demodulation and how to configure the downlink transmission mode in the MBSFN subframe of R10 in LTE-Advance.
  • the downlink control information in the MBSFN subframe is obtained, thereby ensuring the demodulation of the PDSCH in the MBSFN subframe dedicated to the LTE-A UE of the LTE-Advance system.
  • the method includes at least a base station and a user equipment, where
  • the base station is configured to send downlink control information to the user equipment according to the determined downlink transmission mode.
  • the user equipment is configured to acquire the downlink control information according to the downlink control information format in the determined downlink transmission mode on the MBSFN subframe.
  • the MBSFN subframe is a dedicated subframe of the PDSCH transmission of the LTE-A user equipment UE of the advanced long-term evolution LTE-Advance system.
  • the base station is specifically used to:
  • the downlink transmission mode on the MBSFN subframe is the mode a; wherein the mode a is the mode 7 to the mode One of 9; or,
  • the mode configured for the UE is mode b, and the downlink transmission mode on the MBSFN subframe is configured by a higher layer: k modes are selected from the n modes, and then one of the k modes is selected by the high layer signaling, where n is 1 to 9, k is an integer and lk 9; or, the downlink transmission mode is set in advance, and the preset downlink transmission mode is a fixed downlink transmission mode X, where X is an integer and 7 X 9, or The value of X is an integer and is 1 X 6; or, the downlink transmission mode is set in advance, where the preset downlink transmission mode is DCI Format 1A for single antenna port transmission, where the single antenna port is a fixed port, The port is port 7 or port 5; wherein mode b is one of mode 1 to mode 6; or
  • the mode configured for the UE is mode c, the UE does not transmit the PDSCH on the MBSFN subframe, or the base station does not transmit the PDSCH, or the UE does not perform the detection of the DCI format related to the PDSCH scheduling, and when the UE is configured as the mode d, the UE is The MBSFN subframe has a PDSCH transmission, or the base station transmits a PDSCH, or the UE performs PDSCH scheduling related DCI format detection; wherein, mode c is one of mode 1 to mode 6, and mode d is mode 7 to mode 9. One; or, mode c is one of mode 1 to mode 8, mode d is mode 9; or,
  • the mode configured for the UE is mode e
  • the downlink transmission mode on the MBSFN subframe is the mode e
  • the public reference signal is transmitted only on the physical resource block that needs the public reference signal for demodulation; wherein, the mode e is one of mode 1 to mode 9.
  • the base station is further configured to send the public reference signal on the physical resource block of the UE that needs to configure the public reference signal.
  • the downlink control information format 1A DCI Format 1A is used in the MBSFN in the UE-specific search space defined by the public search space and the cell radio network temporary identifier C-RNTI.
  • Sub-frames indicate single-antenna port transmission, port Y; in non-MBSFN subframes, if the number of physical broadcast channel PBCH antenna ports is 1, use single-antenna port transmission, port Z; otherwise, use transmission diversity transmission;
  • the DCI format 1 is used to indicate single-antenna port transmission, and the antenna port is 5; wherein the determined downlink transmission mode is mode 7, and the antenna port Y and port Z are port 5 respectively.
  • port 0 or,
  • the UE-specific search space defined in the common search space and the C-RNTI In the case of the DCI Format 1A, the single antenna port transmission is indicated in the MBSFN subframe, port Y; in the non-MBSFN subframe, if the number of PBCH antenna ports is 1, the single antenna port is used for transmission, port Z; otherwise, Transmission diversity transmission; in the UE-specific search space defined by the C-RNTI, the DCI format 2B is used to indicate double layer transmission, the antenna ports are 7 and 8, or the single layer transmission, and the antenna port is 7 or 8; The determined downlink transmission mode is mode 8, and antenna port Y and port Z are port 7 and port 0, respectively; or
  • the DCI Format 1A indicates single-antenna port transmission under the MBSFN subframe, port Y; in the non-MBSFN subframe, if the number of PBCH antenna ports is 1, the single-antenna port is transmitted, port Z; otherwise, ⁇ Transmission diversity transmission; in the UE-specific search space defined by the C-RNTI, the DCI format 2C is used to indicate a maximum of 8 layers of transmission, and the antenna port is one of the ports 7 to 14; wherein the determined downlink transmission Mode is mode 9, antenna port Y and port Z are port 7 and port 0, respectively.
  • modes 1 to 6 need to use CRS to perform PDSCH demodulation, and modes 7 to 9 do not require CRS, but need dedicated pilot (DMRS, Dedicated Modulation Reference Signal) to demodulate the PDSCH. Therefore, in the LTE-A UE-dedicated MBSFN subframe of the LTE-Advance system, the PDCCH detection and the PDSCH demodulation, or the mode 1 to 6 transmission mode, need to be performed according to the mode in which the mode ⁇ -9 or later is present. Make a limit. In the mode, DCI format 1A in ⁇ 9 may need to use transmission diversity method for transmission.
  • the transmission method of transmission diversity requires CRS for demodulation work, so it is necessary to change DCI format 1 A in modes 7 ⁇ 9.
  • the way of transmission If the UE is set by the higher layer to perform PDCCH decoding with the cyclic redundancy check scrambled by the cell radio network temporary identity, the UE shall decode the PDCCH and all associated PDSCHs according to the respective combinations defined in Table 3.
  • UE single antenna port Single-antenna port defined by C-RNTI
  • Multi-user multiple input multiple output
  • UE port 7 and port 8 (port 7 and 8) defined by C-RNTI;
  • port 7 or 8 If it is not an MBSFN subframe: If the number of PBCH antenna ports is 1, use a single antenna port
  • port 7 ( Single-antenna port ); port 7 ( port 7 ) up to 8 layers of transmission ( up to 8 layer
  • one of the downlink transmission modes of mode 7, or mode 8, or mode 9, or R10, or only the DCI format indicating the transmission of the single antenna port is detected.
  • the single antenna port is a fixed port, such as port 7 or port 5, for performing PDCCH detection.
  • Method 1 high-level configuration.
  • k modes are selected from the n modes (mode 1 to mode 9) shown in Table 3, and one mode is selected from the k modes by higher layer signaling.
  • Select 3 modes ie, modes 7-9, from mode 1-9, and notify the UE by high-level configuration signaling.
  • the downlink transmission mode on the MBSFN is a preset mode.
  • a mode is preset, and when the UE performs PDCCH detection, the mode may be one of modes 7 to 9 in Table 3, or may only detect and represent DCI Format 1A for single antenna port transmission, where the single antenna port is a fixed port, such as port 7 or port 5.
  • the downlink transmission mode on the MBSFN is the same mode as the configuration;
  • the mode configured by the UE is mode 1 to 6
  • the downlink transmission mode on the MBSFN is determined according to the foregoing method 1 or method 2.
  • the UE when the UE is configured as the mode c, the UE does not transmit the PDSCH on the MBSFN subframe, or the base station does not transmit the PDSCH, or the UE does not perform the detection of the DCI format related to the PDSCH scheduling, and when the UE is configured as the mode d
  • the UE has a PDSCH transmission on the MBSFN subframe, or the base station transmits the PDSCH, or the UE performs the detection of the DCI format related to the PDSCH scheduling.
  • mode c is one of modes 1 ⁇ 6, mode d is one of modes 7 ⁇ 9; or mode c is one of modes 1 ⁇ 8, and mode d is mode 9.
  • the PDCCH in the MBSFN subframe that is unique to the LTE-Advance UE, can still be detected according to any one of the downlink transmission modes of the mode 1 to 9, or the R10 version.
  • the base station informs the downlink transmission mode 1 ⁇ 6, or uses other modes and needs CRS for demodulation (using CRS on the unicast service frequency domain resource of the MBSFN subframe instead of the full bandwidth CRS)
  • the CRS position is the same as the CRS position of the subframe other than the MBSFN, which is equivalent to the truncation processing of the CRS for the full bandwidth, and only the physical which requires the CRS for demodulation.
  • the resource block (PRB, Physical Resource Block) is sent, and other locations may or may not be sent.
  • PRB Physical Resource Block
  • a normal subframe (a subframe other than an MBSFN subframe) uses a full-bandwidth CRS structure, and in an MBSFN subframe, only a physics in which a UE needs to configure a public reference signal is used.
  • the CRS is sent on the resource block. In this way, it is not necessary to change the definition of any downlink transmission mode, but only when the CRS is required for demodulation in the MBSFN subframe, the CRS of the partial bandwidth is used for demodulation.

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Abstract

L'invention concerne un procédé et un système d'acquisition d'informations de commande de liaison descendante dans une sous-trame MBSFN. Selon ce procédé : une station de base envoie des informations de commande de liaison descendante à un équipement utilisateur en fonction du mode de transmission en liaison descendante déterminé (300) ; et l'équipement utilisateur acquière les informations de commande de liaison descendante selon un format d'informations de commande de liaison descendante correspondant, dans le mode de transmission en liaison descendante déterminé sur une sous-trame de réseau monofréquence de diffusion/multidiffusion (MBSFN) (301). La présente invention propose une solution au problème lié à l'acquisition d'informations de commande de liaison descendante et à la réalisation d'une démodulation de PDSCH, ainsi qu'à la configuration du mode de transmission en liaison descendante par rapport à la sous-trame MBSFN dans la Version R10 de LTE Avancé. Les informations de commande de liaison descendante dans la sous-trame MBSFN peuvent être acquises dans le système LTE Avancé, ce qui assure la mise en oeuvre de la démodulation du PDSCH dans la sous-trame MBSFN spécifique du LTE-AUE dans le système LTE Avancé.
PCT/CN2011/077666 2010-12-03 2011-07-27 Procédé et système d'acquisition d'informations de commande de liaison descendante dans une sous-trame mbsfn Ceased WO2012071899A1 (fr)

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CN201010572499.5A CN102076098B (zh) 2010-12-03 2010-12-03 获取mbsfn子帧中下行控制信息的方法及系统
CN201010572499.5 2010-12-03

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