CN102076098B - Obtain the method and system of Downlink Control Information in MBSFN sub-frame - Google Patents
Obtain the method and system of Downlink Control Information in MBSFN sub-frame Download PDFInfo
- Publication number
- CN102076098B CN102076098B CN201010572499.5A CN201010572499A CN102076098B CN 102076098 B CN102076098 B CN 102076098B CN 201010572499 A CN201010572499 A CN 201010572499A CN 102076098 B CN102076098 B CN 102076098B
- Authority
- CN
- China
- Prior art keywords
- mode
- port
- downlink transmission
- transmission mode
- downlink
- Prior art date
- Legal status (The legal status 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 status listed.)
- Active
Links
- 238000000034 method Methods 0.000 title claims abstract description 37
- 230000005540 biological transmission Effects 0.000 claims abstract description 202
- 239000010410 layer Substances 0.000 claims description 21
- 125000004122 cyclic group Chemical group 0.000 claims description 17
- 230000011664 signaling Effects 0.000 claims description 10
- 239000002356 single layer Substances 0.000 claims description 4
- 238000001514 detection method Methods 0.000 description 10
- 238000010586 diagram Methods 0.000 description 7
- 230000002776 aggregation Effects 0.000 description 4
- 238000004220 aggregation Methods 0.000 description 4
- 238000012986 modification Methods 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 101000741965 Homo sapiens Inactive tyrosine-protein kinase PRAG1 Proteins 0.000 description 1
- 102100038659 Inactive tyrosine-protein kinase PRAG1 Human genes 0.000 description 1
- 230000007774 longterm Effects 0.000 description 1
- 239000002904 solvent Substances 0.000 description 1
- 230000001360 synchronised effect Effects 0.000 description 1
Classifications
-
- 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
Landscapes
- Engineering & Computer Science (AREA)
- Computer Networks & Wireless Communication (AREA)
- Signal Processing (AREA)
- Mobile Radio Communication Systems (AREA)
Abstract
The invention discloses a kind of method and system obtaining Downlink Control Information in MBSFN sub-frame, comprise base station according to the downlink transfer pattern determined, Downlink Control Information is sent to subscriber equipment; Subscriber equipment, in (single frequency network multicast/broadcast) MBSFN sub-frame, obtains described Downlink Control Information according to descending control information format corresponding in the downlink transfer pattern determined.The present invention is directed to the MBSFN sub-frame in the version R10 of LTE-Advance, how to obtain Downlink Control Information, and then carry out the problem of PDSCH demodulation and how configurating downlink transmission mode, propose solution.Make, in LTE-Advance system, to obtain Downlink Control Information in MBSFN sub-frame, thus ensure that the realization of the demodulation of the PDSCH in the MBSFN sub-frame special to the LTE-A UE of LTE-Advance system.
Description
Technical Field
The invention relates to an advanced LTE (LTE-advanced) system technology, in particular to a method and a system for acquiring downlink control information in an MBSFN subframe.
Background
A Radio Frame (RF) in a Long Term Evolution (LTE) system includes Frame structures of a Frequency Division Duplex (FDD) mode and a Time Division Duplex (TDD) mode.
Fig. 1 is a schematic diagram of a frame structure in FDD mode, and as shown in fig. 1, a 10 millisecond (ms) radio frame is composed of twenty slots (slots) with the length of 0.5ms and the number of 0-19, and a subframe (subframe) i with the length of 1ms is composed of slots 2i and 2i + 1.
Fig. 2 is a frame structure diagram of TDD mode, and as shown in fig. 2, a 10ms radio frame is composed of two half-frames (half frames) with a length of 5ms, one half-frame includes 5 subframes with a length of 1ms, and subframe i is defined as 2 slots 2i and 2i +1 with a length of 0.5 ms.
In both frame structures shown in fig. 1 and 2, for a standard cyclic Prefix (Normal CP), a slot contains 7 symbols with a length of 66.7 microseconds (us), wherein the Cyclic Prefix (CP) length of the first symbol is 5.21us, and the remaining 6 symbols are 4.69 us; for Extended Cyclic Prefix (Extended CP), 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 its incremental version corresponds to a version number of R9(Release 9), while the version number of LTE advanced today is R10(Release 10). The following 3 downlink physical control channels are defined in LTE and LTE-Advance:
(1) a Physical downlink Control format indicator Channel (PCFICH), where information carried by the PCFICH is used to indicate the number of Orthogonal Frequency Division Multiplexing (OFDM) symbols for transmitting a Physical Downlink Control Channel (PDCCH) in a subframe, and is transmitted on a first OFDM symbol of the subframe, and a Frequency position of the first OFDM symbol is determined by a system downlink bandwidth and a cell Identity (ID);
(2) a Physical Hybrid automatic repeat Request Indicator Channel (PHICH) for carrying acknowledgement/negative acknowledgement (ACK/NACK) feedback information of uplink transmission data. The number and time-frequency position of the PHICH can be determined by a system message and a cell ID in a Physical Broadcast Channel (PBCH) of a downlink carrier where the PHICH is located;
(3) a Physical Downlink Control Channel (PDCCH) for carrying Downlink Control Information (DCI), including: uplink and downlink scheduling information, and uplink power control information.
Among them, the formats of DCI (DCI format) are classified into the following: DCI format0, DCI format 1A, DCI format 1B, DCI format 1C, DCI format1D, DCI format2, DCI format 2A, DCI format3, and DCI format 3A; wherein,
DCI format0 is used to indicate scheduling of a Physical Uplink Shared Channel (PUSCH);
the DCI format1, the DCI format 1A, the DCI format 1B, the DCI format 1C, and the DCI format1D are used for different modes of codeword scheduling of a Physical Downlink Shared Channel (PDSCH);
the DCI format2, the DCI format 2A and the DCI format 2B are used for different modes of space division multiplexing;
the DCI format3 and the DCI format 3A are used for different modes of a Physical Uplink Control Channel (PUCCH) and a power Control command of the PUSCH.
Physical resources transmitted by a Physical Downlink Control Channel (PDCCH) are in units of Control Channel Elements (CCEs), the size of one CCE is 9 Resource Element Groups (REGs), that is, 36 Resource elements (Resource elements), and one PDCCH may occupy 1, 2, 4, or 8 CCEs. For the four PDCCH sizes occupying 1, 2, 4, 8 CCEs, tree-like aggregation (aggregation) is adopted, i.e. the PDCCH occupying 1 CCE may start from any CCE location; the PDCCH occupying 2 CCEs starts from an even CCE location; a PDCCH occupying 4 CCEs starts from an integer multiple of 4 CCE locations; PDCCHs occupying 8 CCEs start from CCE locations that are integer multiples of 8.
Each aggregation level (aggregation level) defines a Search space (Search space) comprising a common Search space and a User Equipment (UE) Specific Search space. The CCE number of the whole search space is determined by the number of OFDM symbols occupied by the control region indicated by the PCFICH in each downlink subframe and the number of PHICH groups. And the UE carries out blind detection on all possible PDCCH code rates in the search space according to the DCI format of the transmission mode.
The UE receives PDSCH data transmissions as indicated by a PDCCH of a user equipment-Specific (UE-Specific) search space by a transmission mode (transmission mode) that is set to be based on:
mode 1: a single antenna port; port 0 (Single-antipna port; Port 0);
mode 2: transmit diversity (Transmit diversity);
mode 3: open-loop spatial multiplexing (Open-loop spatial multiplexing);
mode 4: closed-loop spatial multiplexing (Closed-loop spatial multiplexing)
Mode 5: multi-user multiple input multiple output (Multi-user MIMO);
mode 6: closed-loop Rank 1 precoding (Closed-loop Rank 1 precoding);
mode 7: a single antenna port; port 5 (Single-antipna port; Port 5).
If the UE is set by the higher layer to: the PDCCH decoding is performed using a Cyclic Redundancy Check (CRC) scrambled by a Cell radio network Temporary Identifier (C-RNTI), and the UE should decode the PDCCH and all related PDSCHs according to the corresponding combinations defined in table 1.
TABLE 1
If the UE is set by the higher layer to: the PDCCH decoding is performed by using CRC scrambled by Semi-persistent Scheduled Cell Radio Network Temporary Identifier (SPSC-RNTI), and the UE should decode the PDCCH and all related PDSCHs according to the corresponding combinations defined in table 2.
TABLE 2
In LTE, multi-cell Multimedia Broadcast and Multicast Service (MBMS) is implemented by combining multiple cells, that is, MBMS signals are transmitted by multiple cells synchronized with each other, and then a combination of multiple cell signals is naturally formed in the air, and this combination is also called Single Frequency Network (SFN) combination because it occurs on the same frequency. The merged transmission is at the UE end, and the reception of the multi-cell MBMS signal does not require any additional complexity, but only needs to be received according to the method for receiving the unicast signal. However, at the eNodeB (base station) side, several different designs are needed to meet the requirements of SFN combining, and one of the most important modifications is to use a longer CP, i.e. extended CP. The conventional CP (normal CP) is designed in a unicast system, that is, a signal sent by the eNodeB of the cell is regarded as a useful signal, and a signal of an adjacent cell is regarded as interference, and at this time, the CP length only needs to cover the multipath delay spread of a single cell. However, in an SFN combining MBMS, also called Single Frequency Network Multicast/broadcast (MBSFN) system, signals from enodebs of multiple cells are all regarded as useful signals, and in this case, the CP needs to cover the delay spread of signals of multiple cells, so there is a longer need for the CP.
In addition, in terms of common Reference Signals (RSs), special MBSFN RSs also need to be designed to adapt to the special needs of MBSFN signal estimation. Therefore, the MBSFN Channel is transmitted in the LTE system using a dedicated Physical Multicast Channel (PMCH).
Currently, in the LTE version, the multicast service on the MBSDN subframe cannot detect downlink control information. In an LTE-Advance system, an LTE-A UE-specific PDSCH may be transmitted on MBSFN subframes. When the LTE-a UE is assigned any one of the downlink transmission modes 1 to 6, a Common Reference Signal (CRS) is used for PDSCH demodulation, and when the LTE-a UE is in an MBSFN subframe, since the MBSFN subframe does not have the CRS, downlink control information cannot be acquired at present, and thus demodulation of the PDSCH cannot be performed.
Disclosure of Invention
In view of this, the main objective of the present invention is to provide a method and a system for acquiring downlink control information in an MBSFN subframe, which can acquire the downlink control information, thereby implementing demodulation of PDSCH in the MBSFN subframe dedicated to LTE-a UE in LTE-advanced system.
In order to achieve the purpose, the technical scheme of the invention is realized as follows:
a method for acquiring downlink control information in an MBSFN subframe comprises the following steps:
the base station sends downlink control information to the user equipment according to the determined downlink transmission mode;
and the user equipment acquires the downlink control information according to the corresponding downlink control information format in the determined downlink transmission mode on the multicast/broadcast MBSFN subframe of the single frequency network.
The MBSFN subframe is a special subframe transmitted by a Physical Downlink Shared Channel (PDSCH) of LTE-A User Equipment (UE) of an LTE-advanced system.
A system for acquiring downlink control information in MBSFN sub-frames at least comprises a base station and user equipment, wherein,
the base station is used for sending the downlink control information to the user equipment according to the determined downlink transmission mode;
and the user equipment is used for acquiring the downlink control information on the MBSFN subframe according to the corresponding downlink control information format in the determined downlink transmission mode.
According to the technical scheme provided by the invention, the base station sends the downlink control information to the user equipment according to the determined downlink transmission mode, wherein the downlink transmission mode is set in an MBSFN subframe special for LTE-A UE of an LTE-advanced system; and the user equipment acquires the downlink control information on the MBSFN subframe according to the corresponding downlink control information format in the determined downlink transmission mode. The invention provides a solution to the problem of how to acquire downlink control information, further perform PDSCH demodulation and how to configure a downlink transmission mode for an MBSFN subframe in LTE-Advance version R10. Therefore, in the LTE-advanced system, the downlink control information in the MBSFN subframe is obtained, and the realization of the demodulation of the PDSCH in the MBSFN subframe special for the LTE-A UE of the LTE-advanced system is ensured.
Drawings
Fig. 1 is a diagram illustrating a frame structure in FDD mode;
FIG. 2 is a diagram of a TDD mode frame structure;
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 diagram of a system for acquiring downlink control information in an MBSFN subframe according to the present invention;
fig. 5 is a schematic structural diagram of a truncated CRS adopted on an MBSFN subframe.
Detailed Description
Fig. 3 is a flowchart of a method for acquiring downlink control information in an MBSFN subframe according to the present invention, and as shown in fig. 3, the method includes the following steps:
step 300: and the base station sends the downlink control information to the user equipment according to the determined downlink transmission mode.
The method for determining the downlink transmission mode in the step comprises the following steps: after the higher layer (such as a base station) is configured, the UE is informed through a higher layer signaling; alternatively, the setting is performed by a preset method. In particular, the amount of the solvent to be used,
the downlink transmission mode on the MBSFN subframe comprises the following steps of: selecting k modes from n modes, and selecting one mode from k modes by high-level signaling; wherein n is a mode 1 to a mode 9 of downlink transmission, k is an integer and is more than or equal to 1 and less than or equal to 9.
The presetting of the downlink transmission mode on the MBSFN subframe comprises the following steps: the preset downlink transmission mode is a fixed downlink transmission mode X, wherein the value of X is an integer and X is more than or equal to 7 and less than or equal to 9, or the value of X is an integer and X is more than or equal to 1 and less than or equal to 6. When X is an integer and X is more than or equal to 1 and less than or equal to 6, the preset downlink transmission mode only represents DCI Format 1A transmitted by a single antenna port, wherein the single antenna port is a fixed port, and the port preferred value is port 7 or port 5.
When the mode configured by the base station for the UE is one of a mode a or a downlink transmission mode after the R10 version, the downlink transmission mode on the MBSFN is the same mode a; wherein the mode a is one of modes 7-9;
when the mode configured by the base station for the UE is the mode b, the downlink transmission mode on the MBSFN is configured by the higher layer: selecting k modes from n modes, and selecting one mode from the k modes by a high-level signaling, wherein n is a mode 1 to a mode 9 of downlink transmission, k is an integer and is more than or equal to 1 and less than or equal to 9; or a downlink transmission mode is preset, the preset downlink transmission mode is a fixed downlink transmission mode X, wherein the value of X is an integer and X is more than or equal to 7 and less than or equal to 9, or the value of X is an integer and X is more than or equal to 1 and less than or equal to 6; or, the downlink transmission mode is preset, wherein the preset downlink transmission mode is DCIFormat 1A transmitted by a single antenna port, the single antenna port is a fixed port, and the port is port 7 or port 5; wherein the mode b is one of modes 1-6;
when the mode configured by the base station to the UE is 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 to the mode d, the UE transmits the PDSCH 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. Wherein, the mode c is one of the modes 1-6, and the mode d is one of the modes 7-9; alternatively, the mode c is one of the modes 1 to 8, and the mode d is the mode 9.
When the mode configured by the base station for the UE is the mode e, the downlink transmission mode on the MBSFN is the same mode e, and the common reference signal is only sent on the physical resource block which needs the common reference signal for demodulation. Wherein the mode e is one of the modes 1 to 9. At this time, the base station transmits the common reference signal on a physical resource block where the UE needs to configure the common reference signal.
Step 301: and the user equipment acquires the downlink control information according to a corresponding downlink control information format in the determined downlink transmission mode on the MBSFN subframe. The MBSFN subframe is a special subframe for PDSCH transmission of LTE-A UE of an LTE-advanced system. The method specifically comprises the following steps:
in the downlink control information under the determined downlink transmission mode, when a cyclic check code in a downlink control channel is scrambled by using a cell radio network temporary identifier, in a UE (user equipment) specific search space defined by a public search space and a cell radio network temporary identifier (C-RNTI), DCI Format 1A is used for representing single-antenna port transmission and port Y under an MBSFN (multicast broadcast single frequency network) subframe; in the non-MBSFN subframe, if the number of Physical Broadcast Channel (PBCH) antenna ports is 1, single antenna port transmission is adopted, and the port Z is a port Z; otherwise, transmission diversity transmission is adopted. And in a UE (user equipment) specific search space defined by the C-RNTI, DCI format1 is adopted to represent single antenna port transmission, and the number of antenna ports is 5. The determined value of the downlink transmission mode may be selected as mode 7, and the antenna port Y and the port Z may be selected as port 5 and port 0, respectively.
In determining downlink control information in a downlink transmission mode, when a cyclic check code in a downlink control channel is scrambled by adopting a cell radio network temporary identifier, in a public search space and a UE (user equipment) specific search space defined by C-RNTI (cell-radio network temporary identifier), DCI Format 1A is adopted to represent single-antenna port transmission and port Y under an MBSFN (multicast broadcast single frequency network) subframe; in the non-MBSFN subframe, if the number of PBCH antenna ports is 1, single antenna port transmission is adopted, and the port Z is adopted; otherwise, transmission diversity transmission is adopted. In the UE specific search space defined by the C-RNTI, DCI format 2B is adopted to represent double-layer transmission, antenna ports are port 7 and port 8, or single-layer transmission, and antenna ports are port 7 or port 8. The determined value of the 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.
In the downlink control information under the determined downlink transmission mode, when a cyclic check code in a downlink control channel is scrambled by adopting a cell radio network temporary identifier, in a public search space and a UE (user equipment) specific search space defined by C-RNTI (radio network temporary identifier), DCI Format 1A is adopted to represent single-antenna port transmission under an MBSFN (multicast broadcast single frequency network) subframe, and a port Y is adopted; in the non-MBSFN subframe, if the number of PBCH antenna ports is 1, single antenna port transmission is adopted, and the port Z is adopted; otherwise, transmit diversity transmission is employed. In a UE (user equipment) specific search space defined by C-RNTI (C-radio network temporary identifier), DCI format 2C is adopted to represent at most 8 layers of transmission, and an antenna port is one of ports 7-14. The determined value of the downlink transmission mode may be selected as mode 9, and the antenna port Y and the port Z may be selected as port 7 and port 0, respectively.
In summary, the present invention provides a solution to the problem of how to acquire downlink control information, perform PDSCH demodulation, and configure a downlink transmission mode for an MBSFN subframe in LTE-Advance release R10. Therefore, in the LTE-advanced system, the downlink control information in the MBSFN subframe is obtained, and the realization of the demodulation of the PDSCH in the MBSFN subframe special for the LTE-A UE of the LTE-advanced system is ensured.
Fig. 4 is a schematic diagram of a system for acquiring downlink control information in an MBSFN subframe according to the present invention, as shown in fig. 4, the system at least includes a base station and a user equipment, wherein,
and the base station is used for sending the downlink control information to the user equipment according to the determined downlink transmission mode.
And the user equipment is used for acquiring the downlink control information on the MBSFN subframe according to the corresponding downlink control information format in the determined downlink transmission mode. The MBSFN subframe is a special subframe for PDSCH transmission of LTE-A user equipment UE of an LTE-advanced system.
The base station is specifically configured to:
when the downlink transmission mode configured for the UE is one of a mode a or a downlink transmission mode after R10 version, the downlink transmission mode on the MBSFN subframe is the mode a; wherein the mode a is one of modes 7 to 9; or,
the mode configured for the UE is a mode b, and a downlink transmission mode on the MBSFN subframe is configured by a higher layer: selecting k modes from n modes, and selecting one mode from the k modes by a high-level signaling, wherein n is 1 to 9, k is an integer and is more than or equal to 1 and less than or equal to 9; or the downlink transmission mode is preset, the preset downlink transmission mode is a fixed downlink transmission mode X, wherein the value of X is an integer and X is more than or equal to 7 and less than or equal to 9, or the value of X is an integer and X is more than or equal to 1 and less than or equal to 6; or, the downlink transmission mode is preset, wherein the preset downlink transmission mode is DCI Format 1A transmitted by a single antenna port, the single antenna port is a fixed port, and the port is a port 7 or a port 5; wherein, the mode b is one of the modes 1 to 6; or,
the mode configured for the UE is mode c, the UE has no PDSCH transmission on the MBSFN subframe, or the base station does not transmit PDSCH, or the UE does not detect DCI format related to PDSCH scheduling, and when the UE is configured as mode d, the UE has PDSCH transmission on the MBSFN subframe, or the base station transmits PDSCH, or the UE detects DCI format related to PDSCH scheduling; wherein, the mode c is one of the modes 1 to 6, and the mode d is one of the modes 7 to 9; or, the mode c is one of the modes 1 to 8, and the mode d is the mode 9; or,
the mode configured for the UE is a mode e, the downlink transmission mode on the MBSFN subframe is the mode e, and the common reference signal is only sent on a physical resource block which needs the common reference signal for demodulation; wherein the mode e is one of the modes 1 to 9.
And the base station is also used for sending the public reference signal on the physical resource block which needs to be configured by the UE.
The user equipment is specifically configured to:
in the downlink control information in the determined downlink transmission mode, when a cyclic check code in a downlink control channel is scrambled by using a cell radio network temporary identifier, in a public search space and a UE (user equipment) proprietary search space defined by the cell radio network temporary identifier C-RNTI, a downlink control information format 1A DCIFormat 1A is used for representing single-antenna port transmission and port Y under an MBSFN subframe; in a non-MBSFN subframe, if the number of antenna ports of a physical broadcast channel PBCH is 1, single antenna port transmission is adopted, and a port Z is adopted; otherwise, adopting transmission diversity transmission; in a UE (user equipment) special search space defined by C-RNTI (radio network temporary identifier), DCI format1 is adopted to represent single antenna port transmission, and the number of antenna ports is 5; wherein, the determined downlink transmission mode is mode 7, and the antenna port Y and the port Z are respectively port 5 and port 0; or,
in the downlink control information under the determined downlink transmission mode, when the cyclic check code in the downlink control channel is scrambled by using a cell radio network temporary identifier, in a public search space and a UE (user equipment) specific search space defined by C-RNTI (radio network temporary identifier), DCI Format 1A is used for representing single-antenna port transmission and port Y under an MBSFN (multicast broadcast single frequency network) subframe; in a non-MBSFN subframe, if the number of PBCH antenna ports is 1, single antenna port transmission is adopted, and a port Z is adopted; otherwise, adopting transmission diversity transmission; in a UE (user equipment) special search space defined by C-RNTI (radio network temporary identifier), DCI format 2B is adopted to represent double-layer transmission, antenna ports are 7 and 8, or single-layer transmission is adopted, and the antenna ports are 7 or 8; wherein, the determined downlink transmission mode is mode 8, and the antenna port Y and the port Z are respectively port 7 and port 0; or,
in the downlink control information in the determined downlink transmission mode, when a cyclic check code in a downlink control channel is scrambled by using a cell radio network temporary identifier, in a public search space and a UE (user equipment) specific search space defined by C-RNTI (cell radio network temporary identity), DCI Format 1A is used for representing single-antenna port transmission, namely port Y, in an MBSFN subframe; in a non-MBSFN subframe, if the number of PBCH antenna ports is 1, single antenna port transmission is adopted, and a port Z is adopted; otherwise, adopting transmission diversity transmission; in a UE (user equipment) specific search space defined by C-RNTI (radio network temporary identifier), DCI format 2C is adopted to represent that at most 8 layers of transmission are carried out, and an antenna port is one of port 7 to port 14; the determined downlink transmission mode is mode 9, and the antenna port Y and the antenna port Z are port 7 and port 0, respectively.
In the first embodiment, in the downlink transmission mode, the CRS is required to be used for demodulation of the PDSCH in all modes 1 to 6, and the Dedicated Modulation Reference Signal (DMRS) is not required in modes 7 to 9 for demodulation of the PDSCH. Therefore, in the LTE-a UE-dedicated MBSFN subframe of the LTE-Advance system, it is necessary to perform PDCCH detection and PDSCH demodulation according to the patterns of patterns 7 to 9 or later versions, or to limit the transmission modes of patterns 1 to 6. The DCI format 1A in the modes 7 to 9 may need to use a transmission diversity method for transmission, and the transmission diversity transmission method needs CRS for demodulation, so that the transmission method corresponding to the DCI format 1A in the modes 7 to 9 needs to be changed. If the UE is set by the higher layer to PDCCH decoding with cyclic redundancy check scrambled with the cell radio network temporary identity, the UE should decode the PDCCH and all related PDSCHs in the corresponding combinations defined in table 3.
TABLE 3
On an MBSFN subframe exclusive to LTE-Advance UE, one of downlink transmission modes after mode 7, mode 8, mode 9, or R10 version is adopted, or only DCI Format 1A indicating single antenna port transmission is detected, wherein the single antenna port is a fixed port, such as port 7 or port 5, for PDCCH detection.
Specifically, the PDCCH detection is performed according to any of the above modes, and there are several methods as follows:
first, high-level configuration. And 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 the higher layer signaling. Such as: and selecting 3 modes from the modes 1-9, namely modes 7-9, informing the UE by high-level configuration signaling, and performing PDCCH detection by adopting one mode from the modes 7-9, namely the mode 7, on an MBSFN subframe exclusive to the LTE-A UE.
In the second method, the downlink transmission mode on the MBSFN is a preset mode. Such as: a mode is preset on an MBSFN subframe dedicated to LTE-a UE, and when the UE performs PDCCH detection, the mode may be one of modes 7 to 9 in table 3, or only DCIFormat 1A indicating single antenna port transmission may be detected, where the single antenna port is a fixed port, such as port 7 or port 5.
When the mode of the UE configuration is one of modes 7-9 or a downlink transmission mode after R10 version, the downlink transmission mode on the MBSFN is the same as the configuration mode;
and when the mode configured by the UE is the modes 1-6, determining the downlink transmission mode on the MBSFN according to the method I or the method II.
In the fourth method, 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 transmits the PDSCH 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. Wherein, the mode c is one of the modes 1-6, and the mode d is one of the modes 7-9; alternatively, the mode c is one of the modes 1 to 8, and the mode d is the mode 9.
In the second embodiment, in the MBSFN subframe dedicated to LTE-Advance UE, the PDCCH may still be detected according to any one of the downlink transmission modes of modes 1 to 9 or the downlink transmission modes after the R10 release. When the base station notifies that downlink transmission modes 1 to 6 are adopted, or other modes are adopted and CRS is needed for demodulation (CRS on unicast service frequency domain resources of MBSFN subframes is adopted instead of CRS on the whole bandwidth for demodulation of PDSCH), at this time, the position of CRS is the same as the position of CRS of subframes except MBSFN, and the CRS is just equivalent to the interception processing of CRS of the whole bandwidth, and is only transmitted on Physical Resource Block (PRB) which needs CRS for demodulation, and other positions can be transmitted or not transmitted. As shown by the shaded part in fig. 5, the normal subframe (the subframe except the MBSFN subframe) adopts a full-bandwidth CRS structure, and on the MBSFN subframe, the CRS is transmitted only on the physical resource block where the UE needs to configure the common reference signal. Therefore, the definition of any downlink transmission mode does not need to be changed, and only when the CRS is needed to demodulate in the MBSFN subframe, the CRS with partial bandwidth is adopted to demodulate.
The above description is only exemplary of the present invention and should not be taken as limiting the scope of the present invention, and any modifications, equivalents, improvements, etc. that are within the spirit and principle of the present invention should be included in the present invention.
Claims (13)
1. A method for acquiring downlink control information in an MBSFN subframe is characterized by comprising the following steps:
the base station sends downlink control information to User Equipment (UE) according to the determined downlink transmission mode;
the UE acquires downlink control information according to a corresponding downlink control information format in a determined downlink transmission mode on a single frequency network multicast/broadcast MBSFN subframe;
when the downlink transmission mode configured by the base station for the UE is one of mode a and a downlink transmission mode after R10 release, the method for determining the downlink transmission mode includes: the downlink transmission mode on the MBSFN subframe is the mode a; wherein the mode a is one of modes 7 to 9;
acquiring the downlink control information according to the corresponding downlink control information format in the determined downlink transmission mode comprises:
in the downlink control information in the determined downlink transmission mode, when a cyclic check code in a downlink control channel is scrambled by using a cell radio network temporary identifier, in a public search space and a UE (user equipment) proprietary search space defined by the cell radio network temporary identifier C-RNTI, a downlink control information format 1A DCIFormat 1A is used for representing single-antenna port transmission and port Y under an MBSFN subframe; in a non-MBSFN subframe, if the number of antenna ports of a physical broadcast channel PBCH is 1, single antenna port transmission is adopted, and a port Z is adopted; otherwise, adopting transmission diversity transmission; in a UE (user equipment) special search space defined by C-RNTI (radio network temporary identifier), DCI format1 is adopted to represent single antenna port transmission, and the number of antenna ports is 5; wherein, the determined downlink transmission mode is mode 7, and the antenna port Y and the port Z are respectively port 5 and port 0;
or, in the downlink control information in the determined downlink transmission mode, when the cyclic check code in the downlink control channel is scrambled by using the cell radio network temporary identifier, in a common search space and a UE-specific search space defined by C-RNTI, DCI Format 1A is used to represent single-antenna port transmission, port Y, in an MBSFN subframe; in a non-MBSFN subframe, if the number of PBCH antenna ports is 1, single antenna port transmission is adopted, and a port Z is adopted; otherwise, adopting transmission diversity transmission; in a UE (user equipment) special search space defined by C-RNTI (radio network temporary identifier), DCI format 2B is adopted to represent double-layer transmission, antenna ports are port 7 and port 8, or single-layer transmission is carried out, and the antenna ports are port 7 or port 8; wherein, the determined downlink transmission mode is mode 8, and the antenna port Y and the port Z are respectively port 7 and port 0;
or, in the downlink control information in the determined downlink transmission mode, when the cyclic check code in the downlink control channel is scrambled by using the cell radio network temporary identifier, in a common search space and a UE-specific search space defined by C-RNTI, DCI Format 1A is used for representing single-antenna port transmission, port Y, in an MBSFN subframe; in a non-MBSFN subframe, if the number of PBCH antenna ports is 1, single antenna port transmission is adopted, and a port Z is adopted; otherwise, adopting transmission diversity transmission; in a UE (user equipment) specific search space defined by C-RNTI (radio network temporary identifier), DCI format 2C is adopted to represent that at most 8 layers of transmission are carried out, and an antenna port is one of port 7 to port 14; the determined downlink transmission mode is mode 9, and the antenna port Y and the antenna port Z are port 7 and port 0, respectively.
2. The method of claim 1, wherein the MBSFN subframe is a dedicated subframe for PDSCH transmission of a physical downlink shared channel of an LTE-a user equipment UE of an LTE-advanced system.
3. The method of claim 1, wherein the method for determining the downlink transmission mode comprises: and after the high layer configures the downlink transmission mode, informing the UE through a high layer signaling.
4. The method of claim 3, wherein the downlink transmission mode on the MBSFN subframe is configured by a higher layer: selecting k modes from 9 modes of downlink transmission, and selecting one mode from the k modes by a high-level signaling; wherein k is an integer and is more than or equal to 1 and less than or equal to 9.
5. The method of claim 1, wherein the method for determining the downlink transmission mode comprises: the downlink transmission mode is preset.
6. The method according to claim 5, wherein the preset downlink transmission mode is a fixed downlink transmission mode X, where X is an integer and X is greater than or equal to 7 and less than or equal to 9, or the preset downlink transmission mode only indicates DCI Format 1A transmitted by a single antenna port, where the single antenna port is a fixed port and the port is either port 7 or port 5.
7. The method of claim 1, wherein when the mode configured by the base station for the UE is mode b, the method for determining the downlink transmission mode comprises:
the downlink transmission mode on the MBSFN subframe is configured by a higher layer: selecting k modes from 9 modes of downlink transmission, and selecting one mode from the k modes by a high-level signaling, wherein k is an integer and is more than or equal to 1 and less than or equal to 9; or,
presetting the downlink transmission mode, wherein the preset downlink transmission mode is a fixed downlink transmission mode X, and the value of X is an integer and is more than or equal to 7 and less than or equal to 9; or,
presetting the downlink transmission mode, wherein the preset downlink transmission mode is DCI Format 1A transmitted by a single antenna port, the single antenna port is a fixed port, and the port is a port 7 or a port 5;
wherein the mode b is one of the modes 1 to 6.
8. The method of claim 1, wherein when the mode configured by the base station for the UE is mode c, the method for determining the downlink transmission mode comprises:
the UE does not have PDSCH transmission on the MBSFN subframe, or the base station does not send PDSCH, or the UE does not detect DCI format related to PDSCH scheduling, and when the UE is configured to be in the mode d, the UE has PDSCH transmission on the MBSFN subframe, or the base station sends PDSCH, or the UE detects DCI format related to PDSCH scheduling;
wherein, the mode c is one of the modes 1 to 6, and the mode d is one of the modes 7 to 9; alternatively, the pattern c is one of the patterns 1 to 8, and the pattern d is the pattern 9.
9. The method of claim 1, wherein when the mode configured by the base station for the UE is mode e, the method for determining the downlink transmission mode comprises:
the downlink transmission mode on the MBSFN subframe is the mode e, and the public reference signal is only sent on a physical resource block which needs the public reference signal for demodulation; wherein the mode e is one of the modes 1 to 9.
10. The method of claim 9, wherein the base station sends the common reference signal on a physical resource block where the UE needs to configure the common reference signal.
11. A system for acquiring downlink control information in MBSFN sub-frames is characterized by at least comprising a base station and user equipment, wherein,
the base station is used for sending the downlink control information to the user equipment according to the determined downlink transmission mode;
the user equipment is used for acquiring the downlink control information on the MBSFN subframe according to a corresponding downlink control information format in the determined downlink transmission mode;
when the downlink transmission mode configured by the base station for the UE is one of a mode a or a downlink transmission mode after R10 version, the downlink transmission mode on the MBSFN subframe is the mode a; wherein the mode a is one of modes 7 to 9;
the user equipment is specifically configured to: in the downlink control information in the determined downlink transmission mode, when a cyclic check code in a downlink control channel is scrambled by using a cell radio network temporary identifier, in a public search space and a UE (user equipment) proprietary search space defined by the cell radio network temporary identifier C-RNTI, downlink control information Format 1A DCI Format 1A is used for representing single-antenna port transmission and port Y under an MBSFN subframe; in a non-MBSFN subframe, if the number of antenna ports of a physical broadcast channel PBCH is 1, single antenna port transmission is adopted, and a port Z is adopted; otherwise, adopting transmission diversity transmission; in a UE (user equipment) special search space defined by C-RNTI (radio network temporary identifier), DCI format1 is adopted to represent single antenna port transmission, and the number of antenna ports is 5; wherein, the determined downlink transmission mode is mode 7, and the antenna port Y and the port Z are respectively port 5 and port 0;
or, in the downlink control information in the determined downlink transmission mode, when the cyclic check code in the downlink control channel is scrambled by using the cell radio network temporary identifier, in a common search space and a UE-specific search space defined by C-RNTI, DCI Format 1A is used to represent single-antenna port transmission, port Y, in an MBSFN subframe; in a non-MBSFN subframe, if the number of PBCH antenna ports is 1, single antenna port transmission is adopted, and a port Z is adopted; otherwise, adopting transmission diversity transmission; in a UE (user equipment) special search space defined by C-RNTI (radio network temporary identifier), DCI format 2B is adopted to represent double-layer transmission, antenna ports are 7 and 8, or single-layer transmission is adopted, and the antenna ports are 7 or 8; wherein, the determined downlink transmission mode is mode 8, and the antenna port Y and the port Z are respectively port 7 and port 0;
or, in the downlink control information in the determined downlink transmission mode, when the cyclic check code in the downlink control channel is scrambled by using the cell radio network temporary identifier, in a common search space and a UE-specific search space defined by C-RNTI, DCI Format 1A is used for representing single-antenna port transmission, port Y, in an MBSFN subframe; in a non-MBSFN subframe, if the number of PBCH antenna ports is 1, single antenna port transmission is adopted, and a port Z is adopted; otherwise, adopting transmission diversity transmission; in a UE (user equipment) specific search space defined by C-RNTI (radio network temporary identifier), DCI format 2C is adopted to represent that at most 8 layers of transmission are carried out, and an antenna port is one of port 7 to port 14; the determined downlink transmission mode is mode 9, and the antenna port Y and the antenna port Z are port 7 and port 0, respectively.
12. The system of claim 11, wherein the base station is specifically configured to:
the mode configured for the UE is a mode b, and a downlink transmission mode on the MBSFN subframe is configured by a higher layer: selecting k modes from 9 modes of downlink transmission, and selecting one mode from the k modes by a high-level signaling, wherein k is an integer and is more than or equal to 1 and less than or equal to 9; or the downlink transmission mode is preset, the preset downlink transmission mode is a fixed downlink transmission mode X, wherein the value of X is an integer and X is more than or equal to 7 and less than or equal to 9, or the value of X is an integer and X is more than or equal to 1 and less than or equal to 6; or, the downlink transmission mode is preset, wherein the preset downlink transmission mode is DCI Format 1A transmitted by a single antenna port, the single antenna port is a fixed port, and the port is a port 7 or a port 5; wherein, the mode b is one of the modes 1 to 6; or,
the mode configured for the UE is mode c, the UE has no PDSCH transmission on the MBSFN subframe, or the base station does not transmit PDSCH, or the UE does not detect DCI format related to PDSCH scheduling, and when the UE is configured as mode d, the UE has PDSCH transmission on the MBSFN subframe, or the base station transmits PDSCH, or the UE detects DCI format related to PDSCH scheduling;
wherein, the mode c is one of the modes 1 to 6, and the mode d is one of the modes 7 to 9; or, the mode c is one of the modes 1 to 8, and the mode d is the mode 9; or,
the mode configured for the UE is a mode e, the downlink transmission mode on the MBSFN subframe is the mode e, and the common reference signal is only sent on a physical resource block which needs the common reference signal for demodulation; wherein the mode e is one of the modes 1 to 9.
13. The system of claim 12, wherein the base station is further configured to send the common reference signal on a physical resource block where the UE needs to configure the common reference signal.
Priority Applications (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201010572499.5A CN102076098B (en) | 2010-12-03 | 2010-12-03 | Obtain the method and system of Downlink Control Information in MBSFN sub-frame |
| PCT/CN2011/077666 WO2012071899A1 (en) | 2010-12-03 | 2011-07-27 | Method and system for acquiring downlink control information in mbsfn subframe |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201010572499.5A CN102076098B (en) | 2010-12-03 | 2010-12-03 | Obtain the method and system of Downlink Control Information in MBSFN sub-frame |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN102076098A CN102076098A (en) | 2011-05-25 |
| CN102076098B true CN102076098B (en) | 2015-09-16 |
Family
ID=44034397
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201010572499.5A Active CN102076098B (en) | 2010-12-03 | 2010-12-03 | Obtain the method and system of Downlink Control Information in MBSFN sub-frame |
Country Status (2)
| Country | Link |
|---|---|
| CN (1) | CN102076098B (en) |
| WO (1) | WO2012071899A1 (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| RU2767052C2 (en) * | 2017-11-17 | 2022-03-16 | Хуавей Текнолоджиз Ко., Лтд. | Device and method for indicating a detection window |
Families Citing this family (19)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102076098B (en) * | 2010-12-03 | 2015-09-16 | 中兴通讯股份有限公司 | Obtain the method and system of Downlink Control Information in MBSFN sub-frame |
| CN102843209B (en) | 2011-06-22 | 2015-09-30 | 华为技术有限公司 | The method and apparatus of control channel |
| CN102868480B (en) * | 2011-07-07 | 2016-06-08 | 华为技术有限公司 | Control the detection of signaling, sending method and subscriber equipment, base station |
| CN105933981B (en) | 2011-08-08 | 2019-08-23 | 华为技术有限公司 | Detection, the method and apparatus for sending information |
| US9197387B2 (en) * | 2011-08-15 | 2015-11-24 | Google Technology Holdings LLC | Method and apparatus for control channel transmission and reception |
| US11239971B2 (en) | 2011-11-03 | 2022-02-01 | Texas Instruments Incorporated | Method and apparatus with enhanced control messages and search space |
| EP2615765B1 (en) * | 2012-01-11 | 2021-10-20 | Samsung Electronics Co., Ltd. | Apparatus and method for transmitting/receiving downlink data channel signal transmission information in cellular radio communication system using cooperative multi-point scheme |
| CN103220691A (en) * | 2012-01-21 | 2013-07-24 | 中兴通讯股份有限公司 | Sending method and detecting method of downlink control information, base station and user equipment |
| CN103249148B (en) * | 2012-02-01 | 2018-04-13 | 中兴通讯股份有限公司 | Configure the method and device of control signaling |
| CN104145523B (en) * | 2012-08-03 | 2018-01-23 | 华为技术有限公司 | Information transferring method and terminal, base station |
| JP6342904B2 (en) | 2012-10-04 | 2018-06-13 | エルジー エレクトロニクス インコーポレイティド | Downlink signal transmission / reception method and apparatus in consideration of antenna port relationship in wireless communication system |
| CN103796315B (en) * | 2012-11-02 | 2018-12-11 | 南京中兴软件有限责任公司 | The Physical Resource Block configuration method and device of user equipment specific search space |
| EP3211955B1 (en) * | 2013-01-07 | 2018-11-28 | LG Electronics Inc. | Method for transmitting and receiving signals at a base station and corresponding base station |
| CN104969503B (en) * | 2013-01-17 | 2018-01-30 | 英特尔Ip公司 | The method of user equipment and user equipment and the base station of correlation are operated in the lte networks |
| CN104144488A (en) * | 2013-05-07 | 2014-11-12 | 中兴通讯股份有限公司 | Synchronous tracking common reference signal transmitting method and device |
| US20150147994A1 (en) * | 2013-11-27 | 2015-05-28 | Mediatek Inc. | Methods for Interference Cancellation and Suppression with Network Assistance |
| EP3345447B1 (en) * | 2015-09-25 | 2020-07-15 | Sony Corporation | Reduction of crc field in compact dci message on m-pdcch for low cost mtc devices |
| CN113543039B (en) * | 2020-04-22 | 2022-06-10 | 成都鼎桥通信技术有限公司 | Multicast signal sending method and device |
| CN113890681B (en) * | 2021-09-28 | 2023-12-08 | 中信科移动通信技术股份有限公司 | Method and system for identifying downlink transmission mode |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101541063A (en) * | 2009-04-27 | 2009-09-23 | 中兴通讯股份有限公司 | Transmission method and device of downlink control signaling |
| CN101651995A (en) * | 2009-09-21 | 2010-02-17 | 中兴通讯股份有限公司 | Transmission method and system of downlink control information |
| CN101656717A (en) * | 2008-08-21 | 2010-02-24 | 中兴通讯股份有限公司 | Method for acquiring/allocating multicast/broadcast subframes on single frequency network and acquiring device thereof |
| CN101715211A (en) * | 2009-11-02 | 2010-05-26 | 中兴通讯股份有限公司 | Method and device for setting transmission mode |
| CN101764642A (en) * | 2009-12-30 | 2010-06-30 | 中兴通讯股份有限公司 | Transmission method and transmission system of descending control information |
Family Cites Families (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103402239B (en) * | 2007-04-11 | 2017-07-04 | 奥普蒂斯无线技术有限责任公司 | For the information on reference signal structure of neighbor cell measurement |
| CN102076098B (en) * | 2010-12-03 | 2015-09-16 | 中兴通讯股份有限公司 | Obtain the method and system of Downlink Control Information in MBSFN sub-frame |
-
2010
- 2010-12-03 CN CN201010572499.5A patent/CN102076098B/en active Active
-
2011
- 2011-07-27 WO PCT/CN2011/077666 patent/WO2012071899A1/en active Application Filing
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101656717A (en) * | 2008-08-21 | 2010-02-24 | 中兴通讯股份有限公司 | Method for acquiring/allocating multicast/broadcast subframes on single frequency network and acquiring device thereof |
| CN101541063A (en) * | 2009-04-27 | 2009-09-23 | 中兴通讯股份有限公司 | Transmission method and device of downlink control signaling |
| CN101651995A (en) * | 2009-09-21 | 2010-02-17 | 中兴通讯股份有限公司 | Transmission method and system of downlink control information |
| CN101715211A (en) * | 2009-11-02 | 2010-05-26 | 中兴通讯股份有限公司 | Method and device for setting transmission mode |
| CN101764642A (en) * | 2009-12-30 | 2010-06-30 | 中兴通讯股份有限公司 | Transmission method and transmission system of descending control information |
Non-Patent Citations (2)
| Title |
|---|
| Samsung.DL transmission mode in MBSFN subframes.《R1-105386 3GPP TSG RAN WG1 #62bis》.2010,全文. * |
| Samsung.PDSCH transmission in MBSFN subframes.《R1-106039 3GPP TSG RAN WG1 #63》.2010,正文. * |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| RU2767052C2 (en) * | 2017-11-17 | 2022-03-16 | Хуавей Текнолоджиз Ко., Лтд. | Device and method for indicating a detection window |
Also Published As
| Publication number | Publication date |
|---|---|
| CN102076098A (en) | 2011-05-25 |
| WO2012071899A1 (en) | 2012-06-07 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN102076098B (en) | Obtain the method and system of Downlink Control Information in MBSFN sub-frame | |
| US10201007B2 (en) | Method for transreceiving signal and apparatus for same | |
| US10841911B2 (en) | Method for transmitting downlink control information in wireless communication system | |
| US9906341B2 (en) | Method for transmitting/receiving a CoMP reference signal | |
| US10862556B2 (en) | Terminal device, base station device, communication method, and integrated circuit | |
| CN101808408B (en) | Transmission method and system of downlink control information | |
| EP3462657B1 (en) | Method and apparatus for transmitting and receiving data information in wireless communication system | |
| US10159090B2 (en) | Method for transmitting, to MTC device, PDSCH including downlink data, and base station therefor | |
| CN107771405B (en) | Downlink power allocation method for wireless communication system and apparatus therefor | |
| KR20140084103A (en) | Method and apparatus for transceiving control information in a wireless communication system | |
| EP3319364B1 (en) | Terminal device, base station device, communication method and integrated circuit | |
| WO2017094320A1 (en) | Base station device, terminal device, and communication method | |
| US9432994B2 (en) | Method for transreceiving signals and apparatus for same | |
| EP3319365B1 (en) | Terminal device, base station device, communication method and integrated circuit | |
| WO2014119865A1 (en) | Method and apparatus for receiving or transmitting downlink control signal in wireless communication system | |
| US9877313B2 (en) | Method for transmitting downlink control channel by base station in wireless communication system, and device therefor | |
| KR102126990B1 (en) | Apparatus and method for transmitting/receiving reference signal in cellular radio communication system using cooperative multi-point scheme | |
| CN101860970A (en) | Control information transmission method, system and device |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant |