WO2014173334A1 - 上下行配置信息通知、获取方法以及基站和用户设备 - Google Patents
上下行配置信息通知、获取方法以及基站和用户设备 Download PDFInfo
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Classifications
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W36/00—Hand-off or reselection arrangements
- H04W36/24—Reselection being triggered by specific parameters
- H04W36/26—Reselection being triggered by specific parameters by agreed or negotiated communication parameters
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L5/00—Arrangements affording multiple use of the transmission path
- H04L5/003—Arrangements for allocating sub-channels of the transmission path
- H04L5/0048—Allocation of pilot signals, i.e. of signals known to the receiver
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L5/00—Arrangements affording multiple use of the transmission path
- H04L5/003—Arrangements for allocating sub-channels of the transmission path
- H04L5/0053—Allocation of signaling, i.e. of overhead other than pilot signals
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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
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
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- H04L5/00—Arrangements affording multiple use of the transmission path
- H04L5/14—Two-way operation using the same type of signal, i.e. duplex
- H04L5/1469—Two-way operation using the same type of signal, i.e. duplex using time-sharing
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W16/00—Network planning, e.g. coverage or traffic planning tools; Network deployment, e.g. resource partitioning or cells structures
- H04W16/02—Resource partitioning among network components, e.g. reuse partitioning
- H04W16/04—Traffic adaptive resource partitioning
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- H04W16/00—Network planning, e.g. coverage or traffic planning tools; Network deployment, e.g. resource partitioning or cells structures
- H04W16/02—Resource partitioning among network components, e.g. reuse partitioning
- H04W16/10—Dynamic resource partitioning
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- H—ELECTRICITY
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- H—ELECTRICITY
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- H04W36/0005—Control or signalling for completing the hand-off
- H04W36/0055—Transmission or use of information for re-establishing the radio link
- H04W36/0069—Transmission or use of information for re-establishing the radio link in case of dual connectivity, e.g. decoupled uplink/downlink
- H04W36/00692—Transmission or use of information for re-establishing the radio link in case of dual connectivity, e.g. decoupled uplink/downlink using simultaneous multiple data streams, e.g. cooperative multipoint [CoMP], carrier aggregation [CA] or multiple input multiple output [MIMO]
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- H04W72/044—Wireless resource allocation based on the type of the allocated resource
- H04W72/0446—Resources in time domain, e.g. slots or frames
Definitions
- Uplink and downlink configuration information notification notification, acquisition method, and base station and user equipment
- the present invention relates to the field of mobile communications, and in particular, to an uplink and downlink configuration information notification, acquisition method, and a base station and a user equipment.
- the Time Division Duplex (TDD) system divides uplink (transmitted by the terminal to the base station) and downlink (issued by the base station) resources in the time domain, and usually allocates uplink and downlink resources in units of time slots or subframes. .
- the base station uses broadcast signaling to notify all terminals in the cell of the allocation of uplink and downlink resources in a semi-static manner.
- Figure 1 shows the frame structure of the TDD mode of the Long Term Evolution (LTE) system (also known as the frame structure type 2).
- LTE Long Term Evolution
- lTs 1/30720000 seconds
- Each field contains 5 subframes of length lms.
- D represents the downlink subframe used to transmit the downlink signal.
- U represents an uplink subframe for transmitting an uplink signal.
- An uplink or downlink subframe is further divided into two 0.5 ms time slots.
- S represents a special subframe, which includes three special time slots, namely, DwPTS (Downlink Pilot Time Slot, downlink pilot time slot for transmitting downlink signals), GP (Guard Period, guard interval), and UpPTS (Uplink Pilot Time Slot, Uplink pilot time slot for transmitting uplink signals).
- DwPTS Downlink Pilot Time Slot, downlink pilot time slot for transmitting downlink signals
- GP Guard Period, guard interval
- UpPTS Uplink Pilot Time Slot, Uplink pilot time slot for transmitting uplink signals.
- the downlink of the LTE system uses Orthogonal Frequency Division Multiplexing (OFDM) technology, and the uplink uses Single Carrier-Frequency Division Multiple Access (SC-FDMA) technology (or DFT Spread).
- OFDM Orthogonal Frequency Division Multiplexing
- SC-FDMA Single Carrier-Frequency Division Multiple Access
- -OFDM technology Under the condition of the regular cyclic prefix (CP, Cyclic Prefix), one slot is composed of 7 OFDM symbols or SC-FDMA symbols. Under the extended cyclic prefix (C), one slot consists of 6 OFDM symbols or SC-FDMA symbols.
- FIG. 2 shows a schematic diagram of a downlink subframe by using a normal CP as an example. Among them, one RE (Resource Element) has a bandwidth of 15 kHz and occupies one OFDM or SC-FDMA symbol in the time domain. An RB (Resource Block) occupies 12 REs in the frequency domain and occupies one time slot in the time domain.
- the LTE system transmits the downlink data service through the Physical Downlink Shared CHannel (PDSCH) and the uplink data service through the Physical Uplink Shared CHannel (PUSCH).
- PDSCH Physical Downlink Shared CHannel
- PUSCH Physical Uplink Shared CHannel
- the LTE physical layer also includes some control channels for assisting uplink and downlink data transmission. For example:
- PDCCH Physical Downlink Control Channel
- the EPDCCH (Enhanced Physical Downlink Control Channel) is used to carry the following control information: ⁇ Uplink scheduling signaling (such as downlink control information (Downlink Control Information,
- the signaling is used to indicate the uplink resource allocation of the terminal, the modulation and coding mode of the transport block, and the like; the national downlink scheduling signaling (such as DCI format 1/1A/1B/1C/1D/2/2A/2B/2C/2D) .
- the signaling is used to indicate the downlink resource allocation of the terminal, the modulation and coding mode of the transport block, and the like;
- National uplink power control signaling (such as DCI format 3/3A).
- the signaling is used to indicate the adjustment of the uplink transmit power of the terminal.
- CHannel used to indicate whether the uplink data transmission result is correct.
- Each downlink control information is added to the CRC (Cyclic Redundancy Check), channel coding, rate matching, etc., and finally in the form of one or more CCEs (Control Channel Element). Send on.
- CRC Cyclic Redundancy Check
- CCEs Control Channel Element
- Send on when the CRC is added, it is necessary to further scramble the CRC with the corresponding RNTI.
- the physical resources of the physical downlink control channel are transmitted by the control channel element CCE.
- the size of one CCE is 9 resource element groups (REGs), that is, 36 resource elements (RE, Resource Element), and one PDCCH may occupy 1 , 2, 4 or 8 CCEs.
- a tree aggregation (Aggregation) is used, that is, a PDCCH occupying one CCE can start from an arbitrary CCE position, and occupy two CCE PDCCHs.
- the even CCE position starts, the PDCCH occupying 4 CCEs starts from the CCE position which is an integer multiple of 4, and the PDCCH occupying 8 CCEs starts from the CCE position which is an integral multiple of 8.
- the regular cyclic prefix CP, Cyclic Prefix
- the first 1 to 3 OFDM symbols of the first slot of each subframe may carry the physical resources of the PDCCH, and the remaining symbols may be carried. Physical resources of the downlink shared channel (PDSCH, Physical Downlink Shared Channel).
- the standard defines a search space that includes a common (Common) search space and a user-specific (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 performs blind detection on all possible PDCCH code rates in the search space according to the DCI format of the transmission mode.
- the uplink and downlink data transmission has a certain timing relationship with its corresponding control signaling.
- the scheduling signaling of the PDSCH is transmitted on the same subframe (assumed to be subframe n) as the PDSCH, and the feedback signaling (ACK/NACK for indicating whether the data is correctly transmitted) of the PDSCH is sent in the subframe n+k after the PDSCH. send.
- the PUSCH is transmitted on the subframe m, and is transmitted on the subframe m-p before the scheduling signaling, and the feedback signaling (ACK/NACK) is transmitted on the subsequent subframe m+q.
- the uplink and downlink services in the service area of the base station change very dramatically.
- the number of users served by one base station is small, the system load is relatively low, and the proportion of uplink and downlink data in the service area changes rapidly.
- the semi-static allocation of uplink and downlink resources of the TDD system affects the efficiency of resource allocation.
- the LTE R12 version introduces a dynamic uplink and downlink configuration adjustment function for the TDD mode.
- how to quickly notify the terminal of the uplink and downlink configuration used by the current cell is still a problem to be solved. Summary of the invention
- the technical problem to be solved by the present invention is to provide an uplink and downlink configuration information notification and acquisition method, and a base station and a user equipment, so as to solve the problem that the uplink and downlink configuration of the terminal cannot be quickly notified.
- the present invention provides an uplink and downlink configuration information notification method, and the method includes:
- the base station sends a downlink control information format to the user equipment (UE), where the uplink and downlink configuration information is used to indicate the uplink and downlink configuration.
- UE user equipment
- the base station is further configured to configure a radio network temporary identifier (RNTI), and the base station configures, by the base station, the same or different uplink and downlink configuration-specific RNTIs.
- RNTI radio network temporary identifier
- the base station notifies the UE to perform uplink and downlink configuration information detection according to the RNTI in one of the following manners:
- the UE is activated to enter a dynamic uplink and downlink configuration adjustment mode.
- the downlink control information format includes a plurality of control domains, where at least one control domain is configured to carry the uplink and downlink configuration information.
- each of the control domains indicates an uplink and downlink configuration.
- the at least one control field of the downlink control information format is used to indicate existing control information or to indicate newly added control information or set to a predefined value.
- the location of the uplink and downlink configuration information in the downlink control information format refers to an index value of a control domain in the downlink control information format.
- the base station configures index values of the same or different control domains for multiple UEs.
- the uplink and downlink configuration information is at least one of the following:
- Uplink and downlink configuration information of one or more serving cells of the UE
- Uplink and downlink configuration information of one or more transit nodes in the serving cell of the UE Uplink and downlink configuration information of a neighboring serving cell of the serving cell of the UE.
- Uplink and downlink configuration information of a neighboring serving cell of the serving cell of the UE Preferably, in a carrier aggregation system:
- the uplink and downlink configuration information of all the serving Solutions that are involved in the aggregation is carried in the same downlink control information format, and is sent through the physical downlink control channel of the primary serving cell;
- the uplink and downlink configuration information of all the serving Solutions that are involved in the aggregation are respectively carried in different downlink control information formats, and are respectively sent through the corresponding physical downlink control channels of the respective serving cells; or, the uplink and downlink configurations of all the serving cells participating in the aggregation
- the information is carried in a predefined downlink control information format and transmitted through a predefined physical downlink control channel.
- the location of the uplink and downlink configuration information in the downlink control information format is determined by any one of the following methods:
- mapping relationship of the configuration parameters of the reference signal is determined; or the mapping relationship with the quasi-co-location (QCL) configuration parameter is determined.
- the location of the uplink and downlink configuration information in the downlink control information format refers to an index value of a control domain in the downlink control information format.
- the base station configures index values of the same or different control domains for multiple UEs.
- the base station sends the downlink control information format by using a physical downlink control channel, where the physical downlink control channel is sent in a public search space; or sent in a public search space and a dedicated search space; or in a carrier aggregation system And transmitting on a common search space of the primary serving cell; or transmitting on a corresponding private search space of each serving cell and a public search space of the primary serving cell.
- the present invention further provides a method for acquiring uplink and downlink configuration information, where the method includes:
- the user equipment performs blind detection of the physical downlink control channel on the candidate search space, and obtains And the downlink control information format, where the uplink and downlink configuration information is used to indicate the uplink and downlink configuration, and the UE extracts the uplink and downlink configuration information according to the location of the uplink and downlink configuration information in the downlink control information format.
- the location of the uplink and downlink configuration information in the downlink control information format is determined by at least one of the following manners:
- mapping relationship of the configuration parameters of the reference signal is determined.
- the location of the uplink and downlink configuration information in the downlink control information format refers to an index value of a control domain in the downlink control information format.
- the present invention further provides a base station, where the base station includes: a control information sending module, configured to: send a downlink control information format to the user equipment (UE), where the carrier is configured to indicate an uplink and downlink configuration Line configuration information.
- a control information sending module configured to: send a downlink control information format to the user equipment (UE), where the carrier is configured to indicate an uplink and downlink configuration Line configuration information.
- the present invention further provides a user equipment, where the user equipment includes: a blind detection module, configured to: perform blind detection of a physical downlink control channel on a candidate search space, and obtain the downlink control information format, The uplink and downlink configuration information used to indicate the uplink and downlink configuration is carried.
- a blind detection module configured to: perform blind detection of a physical downlink control channel on a candidate search space, and obtain the downlink control information format, The uplink and downlink configuration information used to indicate the uplink and downlink configuration is carried.
- the information extraction module is configured to: extract the uplink and downlink configuration information according to the location of the uplink and downlink configuration information in the downlink control information format.
- the uplink and downlink configuration information notification and acquisition method, and the base station and the user equipment use the downlink control information format to carry the uplink and downlink configuration information for indicating the uplink and downlink configuration, and achieve the purpose of quickly notifying the uplink and downlink configuration used by the current cell of the terminal. , and does not occupy additional physical layer resources, the delay is small, there is no ambiguity problem.
- FIG. 1 is a schematic diagram of a second type of frame structure of an LTE system
- Figure 2 is a schematic view of an embodiment of the present invention
- Figure 3 is another schematic view of an embodiment of the present invention.
- Figure 4 is another schematic view of an embodiment of the present invention.
- Figure 5 is another schematic view of an embodiment of the present invention.
- Figure 6 is another schematic view of an embodiment of the present invention.
- Figure 7 is another schematic view of an embodiment of the present invention.
- Figure 8 is another schematic view of an embodiment of the present invention.
- Figure 9 is another schematic view of an embodiment of the present invention.
- Figure 10 is another schematic view of an embodiment of the present invention.
- FIG. 11 is a schematic diagram of an embodiment of an uplink and downlink configuration information obtaining method according to the present invention.
- FIG. 12 is a schematic structural diagram of a module of an embodiment of a base station according to the present invention.
- FIG. 13 is a schematic structural diagram of a module of an embodiment of a user equipment according to the present invention.
- SIB System Information Block
- RRC Radio Resource Control
- High-level signaling such as Resource Control) /MAC (Medium Access Control) has a long period and a large delay, and there is a problem that the terminal and the base station have inconsistent understanding of the signaling execution time, and cannot meet the requirements of uplink and downlink dynamic reconfiguration.
- the main advantage of signaling the uplink and downlink configuration through physical layer signaling is that the delay is small and there is no ambiguity problem.
- the present invention provides a new uplink and downlink configuration information notification method and an uplink and downlink configuration information acquisition method, wherein the downlink control information format is used to carry uplink and downlink configuration information for indicating an uplink and downlink configuration.
- the base station configures proprietary through higher layer signaling.
- the RNTI Radio Network Temporary Identifier
- TDD-RNTI Radio Network Temporary Identifier
- the configured TDD-RNTI is different from all existing RNTIs configured for the UE:
- the downlink control information format that is the same as the number of bits included in the existing downlink control information format 1A or 1C is used to carry the uplink and downlink configuration information, which is referred to as the downlink control information format 1E in this embodiment.
- the information bits included in the downlink control information format sent by the base station are used to indicate the uplink and downlink configuration information. Considering that there are 7 uplink and downlink configurations supported by the existing TDD system, it can be set every 3 bits. Indicates an uplink and downlink configuration respectively; since the number of bits included in the downlink control information format 1A or 1C is not an integer multiple of 3 in some bandwidth configurations, the remaining bits (less than 3 bits) are reserved.
- the base station further configures an index value for the UE to indicate, in which control domain of the downlink control information format, the user equipment obtains uplink and downlink configuration information, which is recorded as TDD-index;
- the index value of the control field in this embodiment is a specific representation for indicating the location of the uplink and downlink configuration information in the downlink control information format.
- it may be determined by high layer signaling; or determined by a predefined manner; or determined according to a mapping relationship with a serving cell index; or determined according to a mapping relationship with a carrier indication control domain (CIF); or according to a CSI-RS
- the mapping of the -config high-level configuration parameters is determined.
- the base station when determined by higher layer signaling, configures index values of the same or different control domains for multiple UEs.
- the physical downlink control channel is blindly detected in the candidate search space, and the decoded downlink control information including the CRC is obtained, and then, according to the configuration of the base station,
- the RNTI for detecting the uplink and downlink configuration information performs descrambling and CRC check on the CRC. If the CRC check is passed, the TDD-index is further determined according to the TDD-index of the higher layer configuration, and the TDD-index is found from the decoded downlink control information format. Corresponding control domain, so as to obtain corresponding uplink and downlink configuration information.
- the number of bits included in the downlink control information format 1E carrying the uplink and downlink configuration information may be the same as that of the downlink control information format 1A, or may be the same as the downlink control information format 1C.
- the difference between the two is only because the downlink control information formats 1A and 1C contain different numbers of bits, so the ability to carry control information is different, correspondingly, The detection performance of the line control information format is also different. Under the premise of the same aggregation level, the smaller the number of bits included in the downlink control information format, the better the detection performance. Therefore, when determining the number of bits included in the downlink control information format carrying the uplink and downlink configuration information, it is necessary to take a compromise between the carrying capability and the detection performance.
- the base station configures the same dynamic uplink and downlink configuration adjustment RNTI and the same TDD-index for the multiple UEs
- the uplink and downlink configurations of the multiple UEs are the same, thereby implementing the same
- the group UEs are configured with the same uplink and downlink configuration.
- the same dynamic uplink and downlink configuration adjustment RNTI can be configured for the UE groups, but different TDD-indexs can be configured for different UE groups.
- the method of carrying the uplink and downlink configuration information of multiple groups of UEs in a downlink control information format which can greatly reduce the manner in which one downlink control information format can only carry one or a group of uplink and downlink configuration information of the UE.
- the base station configures both functions of the UE to be enabled at the same time.
- the uplink and downlink configurations of the primary serving cell and the secondary serving cell are the same.
- the method in Embodiment 1 can be used, and the base station configures an index value for the UE. Instructing the UE to obtain the uplink and downlink configuration information in the control domain of the downlink control information format, where the uplink and downlink configuration information is applicable to the serving cell participating in the aggregation.
- the uplink and downlink configurations of the respective serving cells that are involved in the aggregation may be different.
- the base station configures multiple index values for the UE, respectively, for indicating that the UE is in the Which control domains in the downlink control information format acquire uplink and downlink configuration information corresponding to each serving cell.
- the base station and the UE agree on a mapping relationship between the serving cell index and the control domain index, and the UE determines the downlink control according to the mapping relationship.
- the uplink and downlink configuration information corresponding to each serving cell is obtained at a corresponding location in the information format. As shown
- the mapping between the serving cell index and the control domain index is pre-agreed between the base station and the UE.
- the UE obtains the uplink and downlink configuration from the decoded downlink control information format, according to the pre-agreed mapping relationship, The corresponding control domain is found, so that the uplink and downlink configuration information corresponding to each serving cell is obtained respectively.
- the base station configures both functions of the UE to be enabled at the same time.
- the base station When the UE has a serving cell that aggregates different uplink and downlink configurations, the base station carries the uplink and downlink configuration information of the serving cell participating in the aggregation in the same downlink control information format, and then sends the uplink downlink control information on the physical downlink control channel of the primary serving cell; Alternatively, the base station carries the uplink and downlink configuration information of the serving cell participating in the aggregation in different downlink control information formats, and then sends the corresponding downlink downlink control channel on the corresponding physical downlink control channel of the serving cell; or, the base station participates The uplink and downlink configuration information of the aggregated serving cell is carried in a predefined downlink control information format, and then sent on a predefined physical downlink control channel;
- a base station can support measurement of channel states of multiple serving cells or transmission nodes by configuring multiple CSI-RS-configs, and the UE performs channels on corresponding resources (including time-frequency code resources) according to the configuration parameters. State measurement. Since the channel measurement is to be performed based on the CSI-RS, only when the base station does send the CSI-RS on the resource corresponding to the CSI-RS-config, that is, the time domain resource corresponding to the CSI-RS-config is the downlink. In the frame, the UE can perform correct channel measurement on the configured CSI-RS resources.
- the transmission direction of the subframe can be dynamically changed. Therefore, when the subframe configured with the CSI-RS becomes the uplink subframe, the UE configures the resource according to the CSI-RS.
- the CSI measured by the UE is inaccurate because the base station does not transmit the CSI-RS at all.
- the reported CSI may be The CSI based on a certain measurement may also be based on an average of multiple CSIs. At this time, if the reported CSI is equal to an average of multiple measured CSIs, in the current mechanism, the UE cannot determine the measurement.
- the CSI is valid (because the UE cannot know whether the time domain resource corresponding to the CSI-RS-config is downlink), and the CSI reported by the UE is the implementation behavior of the UE, and the protocol does not make any provisions, so the base station side cannot judge the CSI reported by the UE. Whether the channel state can be truly reflected, thus affecting the scheduling of the base station.
- the base station establishes a mapping relationship between the CSI-RS-config and the TDD-index, and the UE may find an uplink and downlink configuration corresponding to the CSI-RS-config according to the mapping relationship, where the UE performs the
- the UE may determine whether the CSI-RS is valid. If the configured CSI-RS is an uplink subframe in the current uplink and downlink configuration, the UE may not perform CSI measurement, thereby avoiding the UE. Report invalid CSI.
- the base station configures multi-point coordinated transmission of the UE by using multiple QCL (Quasi Co-Location) configuration parameter sets.
- QCL Quad Co-Location
- the base station establishes a QCL configuration parameter and TDD-index.
- the UE can find the uplink and downlink configuration corresponding to the QCL configuration parameter according to the mapping relationship, and is also equivalent to finding the uplink and downlink configuration of the transmission node corresponding to the QCL configuration parameter.
- the number of bits included in the downlink control information format carrying the uplink and downlink configuration information is the same as the number of bits included in the existing downlink control information format 1A or 1C, and is referred to as downlink control in this embodiment.
- the information format 1E is a downlink control information format sent by the base station, where one or more control fields are used to indicate uplink and downlink configuration information, and the remaining control fields are used to indicate control information other than the uplink and downlink configuration information.
- the control domain may be fixed at the forefront of the downlink control information format, as shown in FIG. 4, or may be fixed at the end of the downlink control information format, as shown in FIG. 5, and may also be through high-level signaling TDD-index. Instructions, as shown in Figure 6.
- the control information carried on the remaining control domains includes, but is not limited to, the following control information: control information related to power control, control information related to channel measurement, and control information related to interference measurement, Detecting control information related to the reference signal;
- the physical downlink control channel is blindly detected in the candidate search space, and the decoded downlink control information including the CRC is obtained, and then, according to the configuration of the base station,
- the RNTI for detecting the uplink and downlink configuration information performs descrambling and CRC check on the CRC. If the CRC check is passed, the downlink is further decoded at a predefined location or according to the TDD-index of the higher layer configuration. Find the uplink and downlink configuration information in the control information format.
- the UE After obtaining the uplink and downlink configuration information, the UE further obtains other downlink control information, such as power control related control information, channel measurement related control information, and interference measurement related control information, in the downlink control information format, Detecting control information related to the reference signal;
- other downlink control information such as power control related control information, channel measurement related control information, and interference measurement related control information, in the downlink control information format, Detecting control information related to the reference signal;
- the uplink and downlink configuration information of a group of UEs may be sent in a downlink control information format, and the uplink and downlink configuration information of multiple groups of UEs may also be sent.
- the configuration method is the same as that of the embodiments 2 and 3.
- the downlink control information format in this embodiment may carry other control information, such as control information related to power control, control information related to channel measurement, and control information related to interference measurement, in addition to carrying uplink and downlink configuration information. , detecting control information related to the reference signal.
- the downlink control information format carrying the uplink and downlink configuration information may also carry other control information, thereby improving the capability of the downlink control information format to carry control information.
- the number of bits included in the downlink control information format that carries the uplink and downlink configuration information is the same as the number of bits included in the existing downlink control information format 1A or 1C, and is referred to as downlink control information in this embodiment.
- Format 1E The downlink control information format sent by the base station, one or more control domains are used to indicate the uplink and downlink configuration information, and the remaining control domains are reserved; as shown in FIG. 7.
- the location of the control domain used to indicate the uplink and downlink configuration information may be indicated by the high layer signaling TDD-index.
- the physical downlink control channel is blindly detected in the candidate search space, and the decoded downlink control information including the CRC is obtained, and then, according to the configuration of the base station, RNTI for detecting uplink and downlink configuration information, for CRC The descrambling and CRC check is performed. If the CRC check is passed, the uplink and downlink configuration information is further found in the decoded downlink control information format at a predefined location or according to the TDD-index of the higher layer configuration.
- the uplink and downlink configuration information of a group of UEs may be sent in a downlink control information format, and the uplink and downlink configuration information of multiple groups of UEs may also be sent.
- the configuration method is the same as that of the embodiments 2 and 3.
- the downlink control information format in this embodiment in addition to carrying the uplink and downlink configuration information, other control domains are set as reserved bits.
- the remaining bits in the downlink control information format may be set as preset values, and the reserved bits are currently The system is not used, but can be reserved for subsequent versions of the system, providing potential for forward compatibility.
- control domains are reserved bits and are set to preset values. These reserved bits can be used as virtual CRC, which is equivalent to increasing the length of the CRC, thereby further reducing the probability of false detection of the downlink control information format. . When these reserved bits are used as virtual CRCs, the number and location of reserved bits need to be agreed between the base station and the UE.
- the base station configures the dynamic uplink and downlink configuration to adjust the proprietary RNTI, which is recorded as TDD-RNTI, and the configured TDD-RNTI is the same as the existing one of the RNTIs of the UE:
- the number of bits included in the downlink control information format carrying the uplink and downlink configuration information and the bit included in the downlink control information format corresponding to the TPC-PUCCH-RNTI is referred to as the downlink control information format 1E in this embodiment;
- the downlink control information format sent by the base station includes a plurality of control domains, and each control domain indicates an uplink and downlink configuration information. Meanwhile, in this form, the base station further configures an index value for the UE. Determining, in the control domain of the downlink control information format, the uplink and downlink configuration information, which is recorded as TDD-index; or obtaining the TDD-index by using the method described in Embodiment 1;
- the UE When the UE receives, according to the number of bits included in the downlink control information format 1E, in the candidate Performing blind detection of the physical downlink control channel on the search space, obtaining the decoded downlink control information including the CRC, and then using the RNTI configured to detect the uplink and downlink configuration information, which is the same as the TPC-PUCCH-RNTI, according to the configuration of the base station. RNTI, the CRC is descrambled and the CRC is checked. If the CRC check is passed, the control domain corresponding to the TDD-index is obtained from the decoded downlink control information format according to the TDD-index of the high-level configuration. Go to the corresponding uplink and downlink configuration information.
- the TDD-RNTI of the UE is the same as the TPC-PUCCH-RNTI of the UE, but the number of bits included in the two downlink control information formats scrambled by the CRC is different.
- Information format; and for two downlink control information formats including equal number of bits, as in this example, the number of bits included in format 1C can be scrambled by different RNTIs used in CRC scrambling. If there is any scrambling with SI-RNTI, some are scrambled with TPC-PUCCH-RNTI. When the UE detects, the different CRC is descrambled to distinguish different downlink control information formats.
- the method can save the cost of the RNTI resource, but the limitation is that the UE group that supports the dynamic uplink and downlink configuration adjustment is bound to the UE group that is adjusted by the TPC power control.
- the TPC power adjustment UE group at different transmission points has greater coupling with the UE group that supports dynamic uplink and downlink configuration adjustment.
- the base station configures the dynamic uplink and downlink configuration to adjust the dedicated RNTI, which is recorded as the TDD-RNTI, and the configured TDD-RNTI and the existing configuration to the UE.
- the dedicated RNTI which is recorded as the TDD-RNTI
- the configured TDD-RNTI and the existing configuration to the UE.
- One of the RNTIs is the same:
- the number of bits included in the downlink control information format carrying the uplink and downlink configuration information is compared with the TPC-PUCCH-RNTI pair.
- the number of bits included in the downlink control information format is also the same, that is, equal to the number of bits included in the downlink control information format 3/3A, as shown in FIG.
- the downlink control information format includes the power control command information corresponding to the original TPC-PUCCH-RNTI, and the uplink and downlink configuration information, that is, the control domain format includes a plurality of control domains.
- One of the control fields is used to indicate the uplink and downlink configuration information, and the remaining control fields are used to indicate the existing control information.
- the base station needs to configure an additional index value TDD-index for the UE to indicate where the user equipment obtains the uplink and downlink in the downlink control information format.
- the UE When receiving the UE, the UE performs blind detection of the physical downlink control channel on the candidate search space according to the number of bits included in the downlink control information format 3/3A, and obtains the decoded downlink control information including the CRC, and then according to the TPC-PUCCH. - RNTI, the CRC is descrambled and the CRC is checked. If the CRC check is passed, the uplink and downlink configuration information is further found from the decoded downlink control information format according to the TDD-index of the higher layer configuration. For UEs with dynamically adjusted uplink and downlink configurations, in addition to obtaining the power control adjustment parameters on the 3/3A according to the TPC-index, the uplink and downlink configuration information is obtained according to the TDD-index in 3/3A.
- the power control command and the uplink and downlink configuration information can be flexibly multiplexed in the same downlink control information format by means of the configuration of the base station, and the old version does not support dynamic adjustment.
- the row-configured UE is multiplexed with the control information of the UE that supports dynamic adjustment of the uplink and downlink configuration.
- the power control command may be 1 bit or 2 bits
- the decoded data is read in steps of 1 or 2 bits.
- the downlink control information format, for the uplink and downlink configuration information requires 3 bits to indicate.
- the decoded downlink control information format is read in steps of 3 bits.
- the base station sends 3/3A and configures TDD-index and TPC-index, it should be properly configured to avoid conflicts.
- the TDD-RNTI is the same as the configured SI-RNTI, and carries uplink and downlink
- the number of bits included in the downlink control information format of the information is the same as the number of bits included in the downlink control information format corresponding to the SI-RNTI, that is, equal to the number of bits included in the downlink control information format 1A, as shown in FIG. .
- the downlink control information format includes the power control command information corresponding to the original SI-RNTI, and also includes the uplink and downlink configuration information, that is, the control information format includes a plurality of control domains, one of which The control domain is used to indicate uplink and downlink configuration information, and the remaining control domains are used to indicate existing control information.
- the base station sends the uplink and downlink configuration information on the reserved control domain.
- the downlink control information format 1 A is scrambled by the SI-RNTI
- the two control domains of the HARQ process ID and the downlink allocation index are reserved.
- the base station can send uplink and downlink configuration information on the two control domains.
- the UE When receiving the UE, the UE performs blind detection of the physical downlink control channel on the candidate search space according to the number of bits included in the downlink control information format 1A, and obtains the decoded downlink control information including the CRC, and then according to the SI-RNTI, The CRC performs descrambling and CRC check. If the CRC check is passed, further the uplink and downlink configuration information is found in the decoded downlink control information format on the reserved control domain, and the downlink control information format 1A is also obtained. Other control information carried.
- the base station can carry the uplink and downlink configuration information out of the existing downlink control information format by using a certain scheduling restriction, or pre-emptively in a certain scenario from the existing downlink control information format.
- the left control domain carries the uplink and downlink configuration information, so that the uplink and downlink configuration information is notified without adding any overhead.
- the downlink control information format carrying the uplink and downlink configuration information is sent through the physical downlink control channel.
- the physical downlink control channel may be sent in a public search space; or sent in a public search space and a dedicated search space; or in a carrier aggregation system, sent in a common search space of the primary serving cell; or in each service The corresponding search space of the cell and the public search space of the primary serving cell are sent.
- the base station sends a downlink control information format to the user equipment (UE, User Equipment), where the uplink and downlink configuration information used to indicate the uplink and downlink configuration is carried. That is, in the present invention, the downlink control information format is used as effective physical layer signaling for carrying uplink and downlink configuration information. It can be understood that only the UE with the dynamic uplink and downlink configuration adjustment function can receive the downlink control information format carrying the uplink and downlink configuration information. Specifically, the base station sends the downlink control information format by using a physical downlink control channel.
- the Cyclic Redundancy Check (CRC) of the downlink control information format described herein is scrambled by using a predefined Radio Network Temporary Identifier (RNTI), wherein the predefined
- the RNTI is a proprietary RNTI or an existing RNTI of a UE having a dynamic uplink and downlink configuration adjustment function
- the existing RNTI includes but is not limited to system information (SI: System Information) RNTI (SI-RNTI), paging (P: Paging) RNTI (P-RNTI), random access (RA: Random Access) RNTI (RA-RNTI), power control command (TPC: Transmit Power Command) RNTI (including TPC-PUCCH-RNTI, TPC-PUSCH -RNTI), cell (C: Cell) RNTI (C-RNTI).
- SI-RNTI System Information
- P Paging
- RA Random Access
- TPC Transmit Power Command
- RNTI including TPC-PUCCH-RNTI, TPC-PUSCH
- Mode 1 High-level signaling notification
- Method 2 By configuring the user equipment's proprietary transmission mode
- Method 3 Enter the dynamic uplink and downlink configuration adjustment mode by activating the user equipment
- the base station may configure multiple RNTIs for the same dynamic uplink and downlink configuration adjustment for multiple user equipments.
- the number of bits included in the downlink control information format in the present invention is equal to the number of bits included in one of the existing defined downlink control information formats, thereby avoiding increasing the physical downlink control information format.
- the number of blind detections is equal to the number of bits included in one of the existing defined downlink control information formats, thereby avoiding increasing the physical downlink control information format.
- the downlink control information format includes a plurality of control domains, where at least one control domain is used Carry the upstream and downstream configuration information.
- the downlink control information format is in one of the following forms:
- the downlink control information format includes a plurality of control domains, where each control domain indicates an uplink and downlink configuration;
- the at least one control domain of the downlink control information format is configured to carry uplink and downlink configuration information, and the at least one control domain is used to indicate existing control information or to indicate new control information or set to a predefined value.
- any of the following forms 2 to 4 can be used:
- the control information format includes a plurality of control domains, where one or more control domains are used to indicate uplink and downlink configuration information, and the remaining control domains are used to indicate control information other than uplink and downlink configuration information (such as new Control information);
- Form 3 the control information format includes a plurality of control domains, where one control domain is used to indicate uplink and downlink configuration information, and the remaining control domains are used to indicate existing control information;
- the control information format includes a plurality of control domains, where one or more control domains are used to indicate uplink and downlink configuration information, and the remaining control domains are set to predefined state values.
- the uplink and downlink configuration information may be uplink and downlink configuration information of one or more serving cells of the UE (in a scenario of carrier aggregation), or one or more of the serving cells of the UE.
- the uplink and downlink configuration information of the transmitting node in the coordinated multi-point transmission (CoMP) mode may also be the uplink and downlink configuration information of the neighboring cell of the UE (other cells except the serving cell of the UE).
- the base station carries the uplink and downlink configuration information of the serving cell participating in the aggregation in the same downlink control information format, and sends the data through the physical downlink control channel of the primary serving cell; or
- the base station carries the uplink and downlink configuration information of the serving cell that participates in the aggregation in different downlink control information formats, and respectively sends them through the corresponding physical downlink control channels of the respective serving cells; or, the base station participates in the service of the aggregation.
- the uplink and downlink configuration information of the cell is carried in a predefined downlink control information format and sent on a predefined physical downlink control channel.
- the location of the uplink and downlink configuration information in the downlink control information format may be determined by any one of the following methods: Determined by high-level signaling; or determined by a predefined manner; or determined according to a mapping relationship with a serving cell index; or determined according to a mapping relationship with a carrier indication control domain (CIF); or configured according to parameters with CSI-RS-config
- the mapping relationship is determined; or determined according to a mapping relationship with a Quasi Co-Location, QCL) configuration parameter;
- control information other than the uplink and downlink configuration information includes and is not limited to the following control information: control information related to power control, control information related to channel measurement, control information related to interference measurement, and control information related to sounding reference signals;
- each of the control domains includes 3 bits, and the remaining bits (less than 3 bits) are reserved, and the 3 bits of each control domain correspond to 7 uplink and downlink configurations in the existing time division duplex system. one.
- the physical downlink control channel may be sent in a public search space; or sent in a public search space and a dedicated search space; or in a carrier aggregation system, sent in a common search space of the primary serving cell; or It is sent on the corresponding private search space of each serving cell and the public search space of the primary serving cell.
- the uplink and downlink configuration information notification method of the present invention has been described above from the perspective of the base station.
- the method for acquiring the uplink and downlink configuration information of the present invention will be described below from the user equipment (UE) side.
- the method for obtaining the uplink and downlink configuration information of the present invention is as shown in FIG. 11, and the method includes:
- Step 111 The user equipment (UE) performs the physical downlink control channel blind detection on the candidate search space, and obtains the downlink control information format, where the uplink and downlink configuration information is used to indicate the uplink and downlink configuration.
- UE user equipment
- the candidate search space may be a public search space; or a public search space and a private search space; or a public search space of the primary serving cell when the carrier is aggregated, or a corresponding private resource of each serving cell
- the search space and the public search space of the main service cell may be a public search space; or a public search space and a private search space; or a public search space of the primary serving cell when the carrier is aggregated, or a corresponding private resource of each serving cell.
- the downlink control information format carrying the uplink and downlink configuration information includes the number of bits included in one of the existing defined downlink control information formats.
- the RNTI needs to adjust the proprietary RNTI to the dynamic uplink and downlink configuration of the user equipment by using the high-layer signaling configuration by the RNTI; or
- the RNTI of the user equipment is used to detect uplink and downlink configuration information, including but not limited to SI-RNTI, P-RNTI, RA-RNTI, TPC-PUCCH-RNTI, TPC-PUSCH-RNTI, C-RNTL
- Step 112 The UE extracts the uplink and downlink configuration information according to the location of the uplink and downlink configuration information in the downlink control information format.
- the location of the uplink and downlink configuration information in the downlink control information format is determined by at least one of the following methods:
- the user equipment may be determined by high layer signaling; or determined by a predefined manner; or determined according to a mapping relationship with a serving cell index; or determined according to a mapping relationship with a carrier indication control domain (CIF); or according to a CSI-RS-
- the mapping relationship of the config configuration parameters is determined; or determined according to the mapping relationship with the QCL high-level configuration parameters.
- the location of the uplink and downlink configuration information in the downlink control information format refers to an index value of a control domain in the downlink control information format.
- the uplink and downlink configuration information of all the serving cells participating in the aggregation is carried in the same downlink control information format; or, in the carrier aggregation scenario, the uplink and downlink configuration information of all the serving cells participating in the aggregation are carried in different downlinks.
- the control information format or in the carrier aggregation scenario, the uplink and downlink configurations of the serving cell that participate in the aggregation are carried in the corresponding downlink control information format of the respective serving cell;
- the UE further obtains other downlink control information in the downlink control information format, which specifically includes: power control related control information, channel measurement related control information, and interference. Measuring related control information and detecting control information related to the reference signal;
- the present invention further provides a base station.
- the base station includes:
- a control information sending module configured to send a downlink control information format to the user equipment (UE), where the uplink and downlink configuration information used to indicate the uplink and downlink configuration is carried.
- the base station further includes: a configuration module, configured to configure the RNTI, and the uplink and downlink configuration-specific radio network temporary identifiers (RNTIs) configured for the multiple UEs are the same.
- the downlink control information format includes a plurality of control domains, where at least one control domain is configured to carry the uplink and downlink configuration information.
- each of the control domains indicates an uplink and downlink configuration.
- the at least one control field of the downlink control information format is used to indicate existing control information or to indicate new control information or set to a predefined value.
- the location of the uplink and downlink configuration information in the downlink control information format is determined by any of the following methods:
- mapping relationship Determined by high-level signaling; or determined by a predefined manner; or determined according to a mapping relationship with a serving cell index; or determined according to a mapping relationship with a carrier indication control domain (CIF); or configured according to parameters with CSI-RS-config
- the mapping relationship is determined; or determined according to the mapping relationship with the QCL configuration parameters.
- the location of the uplink and downlink configuration information in the downlink control information format refers to an index value of a control domain in the downlink control information format.
- the present invention further provides a user equipment.
- the user equipment includes:
- a blind detection module configured to perform a blind detection of the physical downlink control channel on the candidate search space, and obtain the downlink control information format, where the uplink and downlink configuration information used to indicate the uplink and downlink configuration is carried;
- the information extraction module is configured to extract the uplink and downlink configuration information according to the location of the uplink and downlink configuration information in the downlink control information format.
- the location of the uplink and downlink configuration information in the downlink control information format is determined by at least one of the following methods:
- mapping relationship of the parameters is determined; or determined according to the mapping relationship with the QCL configuration parameters.
- the location of the uplink and downlink configuration information in the downlink control information format refers to an index value of a control domain in the downlink control information format.
- the uplink and downlink configuration information of the serving cell that is involved in the aggregation is carried in the same downlink control information format; or, in the carrier aggregation scenario, the uplink and downlink configuration information of all the serving cell participating in the aggregation is carried in different
- the uplink and downlink configurations of the serving cell that participate in the aggregation are carried in the corresponding downlink control information format of the respective serving cell.
- the uplink and downlink configuration information notification and acquisition method, and the base station and the user equipment use the downlink control information format to carry the uplink and downlink configuration information for indicating the uplink and downlink configuration, and achieve the purpose of quickly notifying the uplink and downlink configuration used by the current cell of the terminal. , and does not occupy additional physical layer resources, the delay is small, there is no ambiguity problem.
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US14/907,045 US10149220B2 (en) | 2013-07-25 | 2014-05-08 | Method for notifying and obtaining uplink/downlink configuration information, base station, and user equipment |
JP2016528309A JP6173585B2 (ja) | 2013-07-25 | 2014-05-08 | アップダウンリンク設定情報通知、取得方法、基地局及びユーザー装置 |
EP14788654.3A EP3026946B1 (en) | 2013-07-25 | 2014-05-08 | Method for notifying and obtaining uplink/downlink configuration information, base station, and user equipment |
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EP3026946A1 (en) | 2016-06-01 |
JP2016529796A (ja) | 2016-09-23 |
RU2634714C2 (ru) | 2017-11-03 |
EP3026946A4 (en) | 2016-07-13 |
EP3026946B1 (en) | 2020-11-18 |
JP6173585B2 (ja) | 2017-08-02 |
CN104349460B (zh) | 2019-09-24 |
US20160192331A1 (en) | 2016-06-30 |
CN104349460A (zh) | 2015-02-11 |
RU2016106197A (ru) | 2017-08-30 |
US10149220B2 (en) | 2018-12-04 |
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