Classifications

• • H—ELECTRICITY
  • H04—ELECTRIC COMMUNICATION TECHNIQUE
  • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
  • H04L27/00—Modulated-carrier systems
  • H04L27/26—Systems using multi-frequency codes
  • H04L27/2601—Multicarrier modulation systems
  • H04L27/2602—Signal structure
  • H04L27/2605—Symbol extensions, e.g. Zero Tail, Unique Word [UW]
  • H04L27/2607—Cyclic extensions
• • H—ELECTRICITY
  • H04—ELECTRIC COMMUNICATION TECHNIQUE
  • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
  • H04L27/00—Modulated-carrier systems
  • H04L27/26—Systems using multi-frequency codes
  • H04L27/2601—Multicarrier modulation systems
  • H04L27/2647—Arrangements specific to the receiver only
  • H04L27/2655—Synchronisation arrangements
  • H04L27/2666—Acquisition of further OFDM parameters, e.g. bandwidth, subcarrier spacing, or guard interval length
• • H—ELECTRICITY
  • H04—ELECTRIC COMMUNICATION TECHNIQUE
  • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
  • H04L5/00—Arrangements affording multiple use of the transmission path
  • H04L5/003—Arrangements for allocating sub-channels of the transmission path
  • H04L5/0048—Allocation of pilot signals, i.e. of signals known to the receiver
• • H—ELECTRICITY
  • H04—ELECTRIC COMMUNICATION TECHNIQUE
  • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
  • H04L5/00—Arrangements affording multiple use of the transmission path
  • H04L5/0091—Signalling for the administration of the divided path, e.g. signalling of configuration information

Definitions

• the present invention relates to the field of communications, and in particular, to a method and apparatus for configuring a reference signal. Background technique
• the CP (cyclic prefix) includes two possible configurations: a regular CP and an extended CP.
• CSI-RSs Channel State Information-Reference Signals
• the multiple CSI-RSs may use different CP configurations, that is, Some CSI-RSs use regular CPs, while another part of CSI-RS uses extended CPs.
• the UE cannot correctly obtain the CP configuration used by each CSI-RS. Therefore, the UE may not correctly determine the CSI-RS sequence and/or the pilot pattern corresponding to the CSI-RS, so that the CSI-RS cannot be correctly received and used.
• the embodiments of the present invention provide a method and an apparatus for configuring a reference signal, which can correctly determine a CSI-RS sequence and/or a pilot pattern corresponding to a CSI-RS, and thereby correctly receive and use a CSI-RS.
• a method for configuring a reference signal comprising:
• the base station sends the CP length indication information of the CSI-RS to the UE, where the CP length indication information can be used by the UE to determine the CP length of the CSI-RS, so that the UE is in the CP length, and the determined CSI-RS sequence and/or pilot pattern corresponding to CSI-RS.
• a base station apparatus for configuring a reference signal comprising:
• a sending unit configured to send, to the UE, a CP length indication information of the CSI-RS, where the CP length indication information can be used by the UE to determine a CP length of the CSI-RS, so that the UE is configured according to the CP length. And determining a CSI-RS sequence and/or a pilot pattern corresponding to the CSI-RS.
• a method of configuring a reference signal comprising:
• the UE obtains the CP length of the CSI-RS
• a UE for configuring a reference signal where the UE includes:
• An obtaining unit configured to obtain a CP length of the CSI-RS
• a determining unit configured to determine, according to the CP length acquired by the acquiring unit, a CSI-RS sequence and a pilot pattern corresponding to the CSI-RS.
• the base station sends the CP length indication information of the CSI-RS to the UE, and the UE can obtain the CSI according to the CP length indication information.
• the CP length of the RS which in turn determines the CSI-RS sequence and pilot pattern corresponding to the CSI-RS.
• the CP length of the CSI-RS is determined first, and thus the CSI-RS sequence and/or the pilot pattern corresponding to the CSI-RS can be correctly determined, and the CSI-RS is correctly received and used.
• FIG. 1 is a flowchart of a method for configuring a reference signal according to an embodiment of the present invention
• FIG. 2 is a flowchart of an embodiment of a method for configuring a reference signal according to the present invention
• FIG. 3 is a flowchart of another embodiment of a method for configuring a reference signal according to the present invention
• FIG. 5 is a structural block diagram of a base station apparatus for configuring a reference signal according to an embodiment of the present invention
• FIG. 6A is a structural block diagram of a UE for configuring a reference signal according to an embodiment of the present invention
• 6B is a structural block diagram of the acquisition unit shown in FIG. 6A. detailed description
• An embodiment of the present invention provides a method for configuring a reference signal, where the method is described based on a base station, and includes:
• the base station sends the CP length indication information of the CSI-RS to the UE, where the CP length indication information can be used by the UE to determine the CP length of the CSI-RS, so that the UE is in the CP length, and the determined CSI-RS sequence and/or pilot pattern corresponding to CSI-RS.
• the CP length indication information is used to directly or indirectly indicate the CP length of the CSI-RS.
• the CP length indication information includes: a CP length corresponding to the CSI-RS, a cell identifier of the CSI-RS corresponding cell, and the like.
• the base station can transmit the CP length indication information of the CSI-RS to the UE in various manners. Specifically, in a manner, the base station sends, to the user equipment, the at least one channel state information-reference signal, the at least one channel state information, each channel state information in the reference signal, and the cyclic prefix length indication information corresponding to the reference signal.
• Another way can be bitmap mapping, that is, the base station sends the UE to the UE in a bitmap mapping manner. CP length indication information of the CSI-RS.
• the base station sends the CP length indication information of the CSI-RS to the UE, and the UE can obtain the CP length of the CSI-RS according to the CP length indication information, and further determine the The CSI-RS sequence and pilot pattern corresponding to the CSI-RS are described.
• the CP length of the CSI-RS is determined first, and thus the CSI-RS sequence and/or the pilot pattern corresponding to the CSI-RS can be correctly determined, thereby correctly receiving and using the CSI-RS.
• an embodiment of the present invention further provides a method for configuring a reference signal, where the method is described based on a UE, and includes:
• the UE obtains the CP length of the CSI-RS.
• the UE can obtain the CP length information of the CSI-RS in various manners.
• the UE may determine, according to the CP length indication information of the first CSI-RS delivered by the base station, The length of the CP corresponding to the first CSI-RS.
• the UE may use the CP length corresponding to the first signal as the CP length of the second CSI-RS; or The UE determines that the CP length of the second CSI-RS is a regular cyclic prefix length; or, the UE determines that the CP length of the second CSI-RS is an extended cyclic prefix length; or, the UE determines the second CSI-RS.
• the length of the CP is the same as the length of the CP corresponding to the primary serving cell.
• the first signal may include a signal corresponding to a downlink control channel corresponding to the primary serving cell, a synchronization signal corresponding to the primary serving cell, and a common pilot signal corresponding to the primary serving cell.
• the UE determines, according to the CP length information, a CSI-RS sequence and/or a pilot pattern corresponding to the CSI-RS.
• the base station sends the CP length indication information of the CSI-RS to the UE, and the UE can obtain the CP length of the CSI-RS according to the CP length indication information, and further determine the The CSI-RS sequence and pilot pattern corresponding to the CSI-RS are described. As in this process, the CP of the CSI-RS will be determined first. The length, and thus, the CSI-RS sequence and/or the pilot pattern corresponding to the CSI-RS can be correctly determined, thereby correctly receiving and using the CSI-RS.
• Embodiment 1 are for the case where the base station sends the first CSI-RS to the UE, and the first CSI-RS refers to the CSI that the base station notifies the UE of the CP length information in the embodiment of the present invention.
• -RS Reference Signal
• Embodiment 3 The case where the base station sends the CSI-RS and the second CSI-RS to the UE, where the second CSI-RS is in the embodiment of the present invention, the base station is not sent to the UE.
• a CSI-RS that notifies the CP length information.
• the method for configuring a reference signal includes:
• the base station sends a plurality of CSI-RSs to the UE, and the CP indication information corresponding to the CSI-RS is sent to the UE for each of the multiple CSI-RSs, where the CP indication information includes the CP length information of CSI-RS.
• the CP indication information may further include other CP related information of the CSI-RS, such as CP format information.
• the UE receives the CP indication information corresponding to the CSI-RS, and determines the CP length of the CSI-RS according to the CP indication information.
• the UE may directly determine the CP length of the CSI-RS.
• the base station may notify, for each CSI-RS in the subset of CSI-RSs notified to the UE, the CP length information corresponding to the CSI-RS, and notify the other CSI-RSs of the UE to notify the other CSI-RSs of the UE.
• These CSI-RSs of UE use unified CP or expansion Exhibition CP.
• the UE receives the CP indication information corresponding to the CSI-RS, and according to the CP indication Information, determining other CP related parameter information of the CSI-RS, such as CP format information.
• CP related information such as CP format information, etc.
• the UE determines, according to the determined CP length of the CSI-RS, a CSI-RS sequence and/or a pilot pattern corresponding to the CSI-RS.
• determining the CSI-RS sequence corresponding to the CSI-RS may generate a formula using the following CSI-RS sequence:
• Ci n i t represents state information for initializing a pseudo-random sequence generator at the beginning of each OFDM (Orthogonal Frequency Division Multiplexing) symbol
• n s represents a slot number in a radio frame
• Nc represents the CP length corresponding parameter.
• the pilot pattern corresponding to the CSI-RS may be specifically determined as follows:
• the CP corresponding to the CSI-RS is a regular CP
• the corresponding pilot pattern is found from the CSI-RS pilot pattern set corresponding to the regular CP according to the pilot pattern number of the CSI-RS
• the corresponding pilot pattern is found from the CSI-RS pilot pattern set corresponding to the extended CP according to the pilot pattern number of the corresponding CSI-RS.
• the base station sends the CP length indication information of the CSI-RS to the UE, and the UE can obtain the CP length of the CSI-RS according to the CP length indication information, and further determine the The CSI-RS sequence and pilot pattern corresponding to the CSI-RS are described. Since the CP length of the CSI-RS is determined first in this process, the CSI-RS sequence and/or the corresponding CSI-RS can be correctly determined. The frequency pattern, and thus the CSI-RS, is correctly received and used.
• the embodiment is applicable to the case where the base station sends the cell identifier of the cell corresponding to the CSI-RS to the UE for each CSI-RS sent to the UE, that is, the cell identifier of the cell corresponding to the CSI-RS is used as the CP length indication information of the CSI-RS.
• the method for configuring a reference signal includes:
• the base station sends a plurality of CSI-RSs to the UE, and sends the CSI-RS corresponding CP indication information to the UE for each of the multiple CSI-RSs, where the CP indication information includes The cell identifier (CP length indication information) of the cell corresponding to the CSI-RS.
• the UE receives the CP indication information corresponding to the CSI-RS, and determines the CP length of the cell according to the cell identifier of the cell corresponding to the CSI-RS included in the CP indication information.
• the UE determines that the CP length of the CSI-RS is a CP length corresponding to the cell.
• the UE receives the CP indication information corresponding to the CSI-RS, and according to the CP indication.
• the cell identifier of the cell corresponding to the CSI-RS included in the information is determined, and the other CP-related parameter information of the CSI-RS is determined to be the same as the CP-related parameter (such as the CP format information, etc.) corresponding to the cell.
• the UE determines, according to the determined CP length of the CSI-RS, a CSI-RS sequence and/or a pilot pattern corresponding to the CSI-RS.
• Embodiment 1 For the specific manner of determining the CSI-RS sequence and the pilot pattern, refer to Embodiment 1. It should be noted that, in the embodiment of the present invention, when the base station notifies the cell identifier of the cell corresponding to the CSI-RS of the user equipment, the cell corresponding to the CSI-RS mentioned herein is only used to notify the user equipment of the CP parameter of the CSI-RS. Consistent with the CP parameter of the cell, the cell is not necessarily required to be the cell that transmits the CSI-RS.
• a method for configuring a reference signal provided by an embodiment of the present invention, where a base station sends a message to a UE
• the CP length indication information of the CSI-RS the UE is configured to obtain the CP length of the CSI-RS according to the CP length indication information, and further determine a CSI-RS sequence and a pilot pattern corresponding to the CSI-RS.
• the CP length of the CSI-RS is determined first, and thus the CSI-RS sequence and/or the pilot pattern corresponding to the CSI-RS can be correctly determined, thereby correctly receiving and using the CSI-RS.
• This embodiment is applicable to a case where a plurality of CSI-RSs sent by a base station to a UE include a first CSI-RS and a second CSI-RS.
• the method for configuring a reference signal includes:
• the base station sends multiple CSI-RSs to the UE, where the multiple CSI-RSs include a first CSI-RS and a second CSI-RS.
• the UE receives the multiple CSI-RSs, and determines a CP length of the first CSI-RS and a CP length of the second CSI-RS.
• the UE directly determines a CP length of the second CSI-RS as a regular cyclic prefix length, or the second CSI-RS.
• the second CSI-RS the UE directly determines that the CP length of the second CSI-RS is an extended cyclic prefix length, or, for the second CSI-RS, the UE determines the second CSI-RS
• the length of the CP is the same as the length of the CP corresponding to the primary serving cell.
• the first signal included in the foregoing includes, but is not limited to, a signal corresponding to a downlink control channel corresponding to the primary serving cell, a synchronization signal corresponding to the primary serving cell, and a common pilot signal corresponding to the primary serving cell.
• the base station can determine the CP length of the second CSI-RS in the same manner as the UE.
• the UE according to the determined CP length of the first CSI-RS and the first The CP length of the two CSI-RSs is correspondingly determined by the CSI-RS sequence and/or the pilot pattern corresponding to the first CSI-RS, and the CSI-RS sequence and/or the pilot pattern corresponding to the second CSI-RS.
• the corresponding C-related parameters of the second CSI-RS may be determined according to other CP-related parameters corresponding to the first signal, for example, other CP-related parameters of the second CSI-RS are the same as the CP-related parameters corresponding to the first signal. .
• the base station can acquire the CP length of the second CSI-RS in the same manner as the UE.
• the acquiring, by the base station, the CP length of the CSI-RS may include:
• the base station is configured to use the CP length corresponding to the first signal sent to the UE as the CP length of the second CSI-RS, where the first signal may include the UE a signal corresponding to the downlink control channel corresponding to the primary serving cell, a synchronization signal corresponding to the primary serving cell where the UE is located, a common pilot signal corresponding to the primary serving cell where the UE is located, and the like;
• the base station determines that the CP length of the second CSI-RS is a regular CP length
• the base station determines that the CP length of the second CSI-RS is an extended CP length
• the base station determines that the CP length of the second CSI-RS is the same as the CP length of the primary serving cell of the UE.
• the base station sends the CP length indication information of the CSI-RS to the UE, and the UE can obtain the CP length of the CSI-RS according to the CP length indication information, and further determine the The CSI-RS sequence and pilot pattern corresponding to the CSI-RS are described.
• the CP length of the CSI-RS is determined first, and thus the CSI-RS sequence and/or the pilot pattern corresponding to the CSI-RS can be correctly determined, thereby correctly receiving and using the CSI-RS.
• the base station can The CP length information of the CSI-RS can be notified to the UE in a different manner.
• the various ways are as follows:
• Mode 1 The base station directly notifies the UE of the CP length information corresponding to the CSI-RS or the cell identifier of the cell with the same CP length corresponding to the CSI-RS for each CSI-RS;
• Mode 2 The base station uses a bitmap The way to map to inform which CSI-RSs use regular CPs or extended CPs.
• bit 0 For example, a normal CP can be represented by bit 0 and an extended CP can be represented by bit 1. If the bitmap map ⁇ mouth is shown in the following table:
• CSI-RS2/3 corresponds to the extended CP
• CSI-RS 1/4/5/6/7/8 corresponds to the conventional CP.
• the number of the CSI-RS is well known to the base station and the UE.
• the base station When the base station notifies the UE of the CP length information of the CSI-RS, it notifies a bitmap map (here, 01100000).
• Mode 3 The base station uses a bitmap mapping method to notify which CSI-RSs use the same CP length as the CP length corresponding to a certain cell.
• bitmap mapping can be used to indicate which CSI-RS CPs are the same as the CPs of the designated cell (here, cell 1 is taken as an example:).
• the bit 0 can be used to indicate that the CP corresponding to the specified cell is different, and bit 1 indicates that the CP corresponding to the specified cell is the same. If the bitmap map is as shown in the following table:
• the CP corresponding to CSI-RS2/3 is the same as the CP corresponding to cell 1, and
• the CP corresponding to the CSI-RS 1/4/5/6/7/8 is different from the CP corresponding to the cell 1.
• the number of the CSI-RS is well-known to the base station and the UE, where the designated cell is a cell that the base station notifies to the UE or is predefined, such as the primary serving cell or the PDCCH (Physical Downlink Control) Channel, physical downlink control channel) A cell to the UE or a cell that establishes an RRC (Radio Resource Control) connection with the UE.
• PDCCH Physical Downlink Control
• RRC Radio Resource Control
• the base station When the base station notifies the UE of the CP length information of the CSI-RS, it notifies a bitmap map (here, 01100000).
• the UE may determine the CP length information of the corresponding CSI-RS according to the pre-negotiated bitmap mapping meaning.
• the embodiment of the present invention further provides a base station apparatus 50 for configuring a reference signal. As shown in FIG. 5, the apparatus 50 includes:
• the sending unit 51 is configured to send, to the UE, the CP length indication information of the CSI-RS, where the CP length indication information can be used by the UE to determine a CP length of the CSI-RS, so that the UE is configured according to the CP. Length, determining a CSI-RS sequence and/or a pilot pattern corresponding to the CSI-RS.
• the CP length indication information may include: a CP length corresponding to the CSI-RS, and a cell identifier of the CSI-RS corresponding cell.
• the sending unit 51 is configured to: send, to the user equipment, the loop corresponding to each channel state information-reference signal in the at least one channel state information-reference signal for the at least one channel state information-reference signal
• the prefix length indication information, or the channel state information-reference signal cyclic prefix length indication information is sent to the user equipment in a bitmap mapping manner.
• the base station apparatus configured with the reference signal according to the embodiment of the present invention, the base station sends the CP length indication information of the CSI-RS to the UE, and the UE can obtain the CP length of the CSI-RS according to the CP length indication information, and further determine The CSI-RS sequence and the pilot pattern corresponding to the CSI-RS.
• the CP length of the CSI-RS is determined first, and thus the CSI-RS sequence and/or the pilot pattern corresponding to the CSI-RS can be correctly determined, thereby correctly receiving and using the CSI-RS.
• the embodiment of the present invention further provides a UE 60 for configuring a reference signal. As shown in FIG. 6A, the UE 60 includes:
• An obtaining unit 61 configured to acquire a CP length of the CSI-RS
• the determining unit 62 is configured to determine, according to the CP length of the CSI-RS acquired by the acquiring unit, a CSI-RS sequence and/or a pilot pattern corresponding to the CSI-RS.
• the CSI-RS may be a first CSI-RS or a second CSI-RS.
• the first CSI-RS is that the base station indicates a CSI-RS of a CP length to the UE; and the second CSI-RS is that the base station does not indicate a CP length to the UE.
• CSI-RS is that the base station indicates a CSI-RS of a CP length to the UE.
• the CSI-RS is a first CSI-RS, and as shown in FIG. 6B, the acquiring unit 61 includes:
• the receiving module 61 1 is configured to receive CP length indication information corresponding to the first CSI-RS sent by the base station for the first CSI-RS;
• the determining module 612 is configured to determine a CP length of the first CSI-RS according to the CP length indication information corresponding to the first CSI-RS received by the receiving module 61 1 .
• the CP length indication information includes: a CP length corresponding to the CSI-RS, and a cell identifier of the CSI-RS corresponding cell.
• the CP length indication information is a CP length of the first CSI-RS
• the determining module 612 may directly determine a CP length of the first CSI-RS.
• the CP length indication information is a cell identifier of a cell corresponding to the first CSI-RS; at this time, the determining module 612 is configured to:
• the CSI-RS is a second CSI-RS
• the acquiring unit 61 is further configured to: For the second CSI-RS, using the CP length corresponding to the received first signal as the CP length of the second CSI-RS;
• determining that the CP length of the second CSI-RS is a regular CP length; or determining that the CP length of the second CSI-RS is an extended CP length; or determining a CP length of the second CSI-RS and The CPs corresponding to the primary serving cell are the same length.
• the first signal includes a signal corresponding to a downlink control channel corresponding to the primary serving cell, a synchronization signal corresponding to the primary serving cell, and a common pilot signal corresponding to the primary serving cell.
• the base station apparatus configured with the reference signal according to the embodiment of the present invention, the base station sends the CP length indication information of the CSI-RS to the UE, and the UE can obtain the CP length of the CSI-RS according to the CP length indication information, and further determine The CSI-RS sequence and the pilot pattern corresponding to the CSI-RS.
• the CP length of the CSI-RS is determined first, and thus the CSI-RS sequence and/or the pilot pattern corresponding to the CSI-RS can be correctly determined, and the CSI-RS is correctly received and used.
• the channel state information-reference signal CSI-RS in the present invention includes a channel state information-reference signal CSI-RS resource.
• each unit included is only divided according to functional logic, but is not limited to the foregoing division, as long as the corresponding function can be implemented;
• the specific names are also for convenience of distinguishing from each other and are not intended to limit the scope of the present invention.

Landscapes

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

Priority Applications (2)

Applications Claiming Priority (1)

Publications (1)

Family

ID=49550128

Family Applications (1)

Country Status (2)

Cited By (1)

Families Citing this family (1)

Citations (5)

• 2012
  • 2012-05-11 WO PCT/CN2012/075396 patent/WO2013166725A1/fr not_active Ceased
  • 2012-05-11 CN CN201280000645.4A patent/CN103563321A/zh active Pending

Patent Citations (5)

Also Published As

Similar Documents

Legal Events