WO2012006931A1 - 一种csi-rs的发送方法、检测方法及其装置 - Google Patents
一种csi-rs的发送方法、检测方法及其装置 Download PDFInfo
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- WO2012006931A1 WO2012006931A1 PCT/CN2011/076802 CN2011076802W WO2012006931A1 WO 2012006931 A1 WO2012006931 A1 WO 2012006931A1 CN 2011076802 W CN2011076802 W CN 2011076802W WO 2012006931 A1 WO2012006931 A1 WO 2012006931A1
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- csi
- subframe
- downlink
- time slot
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L1/00—Arrangements for detecting or preventing errors in the information received
- H04L1/02—Arrangements for detecting or preventing errors in the information received by diversity reception
- H04L1/06—Arrangements for detecting or preventing errors in the information received by diversity reception using space diversity
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L1/00—Arrangements for detecting or preventing errors in the information received
- H04L1/0001—Systems modifying transmission characteristics according to link quality, e.g. power backoff
- H04L1/0023—Systems modifying transmission characteristics according to link quality, e.g. power backoff characterised by the signalling
- H04L1/0026—Transmission of channel quality indication
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W72/00—Local resource management
- H04W72/20—Control channels or signalling for resource management
- H04W72/23—Control channels or signalling for resource management in the downlink direction of a wireless link, i.e. towards a terminal
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L1/00—Arrangements for detecting or preventing errors in the information received
- H04L1/0001—Systems modifying transmission characteristics according to link quality, e.g. power backoff
- H04L1/0023—Systems modifying transmission characteristics according to link quality, e.g. power backoff characterised by the signalling
- H04L1/0027—Scheduling of signalling, e.g. occurrence thereof
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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 signalling, i.e. of overhead other than pilot signals
- H04L5/0057—Physical resource allocation for CQI
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W72/00—Local resource management
- H04W72/12—Wireless traffic scheduling
- H04W72/1263—Mapping of traffic onto schedule, e.g. scheduled allocation or multiplexing of flows
- H04W72/1273—Mapping of traffic onto schedule, e.g. scheduled allocation or multiplexing of flows of downlink data flows
Definitions
- the present invention relates to the field of communications technologies, and in particular, to a method, a method, and a device for transmitting a CSI-RS. Background technique
- the RS also known as the pilot signal
- the pilot signals in the Long Term Evolution Release 8 include a Common Reference Signal (C S ) and a UE-specific Reference Signal (DRS).
- C S Common Reference Signal
- DRS UE-specific Reference Signal
- the Advanced Long Term Evolution (LTE-Advanced) system needs to define a Demodulated Reference Signal (DM S ) for the user to support Layer 8 transmission for the physical downlink shared channel. Demodulation of data symbols in (Physical Downlink Shared Channel, PDSCH).
- DM S Demodulated Reference Signal
- PDSCH Physical Downlink Shared Channel
- CQI channel quality indicator
- the LTE-Advanced system also needs to be a downlink channel for LTE-Advanced users.
- the Channel State Information (CSI) measurement defines a new pilot reference signal: CSI-RS, CSI-RS is cell-specific, and its function is similar to CRS in LTE R8. Up to 8 logical ports (ie 8 CSI-RS Ports)
- the embodiments of the present invention provide a method, a detection method, and a device for transmitting a CSI-RS, to determine a CSI-RS transmission mode, and avoid conflicts with other information transmitted in a downlink subframe.
- an embodiment of the present invention provides a method for transmitting a CSI-RS, including: performing a downlink subframe other than a special subframe, a downlink subframe for transmitting control information, and a downlink subframe for transmitting system information. Send CSI-RS.
- a method for transmitting a CSI-RS including:
- the transmission period of the CSI-RS is 5 ms
- the current uplink and downlink time slot configuration mode is mode 1, mode 2, mode 4, or mode 5
- the CSI-RS is transmitted through the subframe 4 and the subframe 9
- the CSI-RS transmission period is 10 ms
- the current uplink and downlink time slot configuration mode is mode 1, mode 2, mode 3, mode 4, mode 5, or mode 6, CSI is transmitted through subframe 9 -RS.
- a CSI-RS transmitting device includes:
- a sending module configured to send the CSI-RS by using a downlink subframe other than the special subframe, the downlink subframe that transmits the control information, and the downlink subframe that transmits the system information.
- a CSI-RS transmitting device includes:
- a sending module configured to: when the current uplink and downlink time slot configuration mode is mode 1, mode 2, mode 4, or mode 5, when the CSI-RS transmission period is 5 ms, pass the 4th subframe and the 9th sub-frame Frame transmission CSI-RS;
- the transmission period of the CSI-RS is 10 ms
- the current uplink and downlink time slot configuration mode is mode 1, mode 2, mode 3, mode 4, mode 5, or mode 6, CSI is transmitted through subframe 9 RS.
- a method for detecting a CSI-RS comprising:
- the CSI-RS is detected in other downlink subframes except the special subframe, the downlink subframe in which the control information is transmitted, and the downlink subframe in which the system information is transmitted.
- a method for detecting a CSI-RS comprising:
- the CSI-RS transmission period is 5 ms, in the case where the current uplink and downlink time slot configuration mode is mode 1, mode 2, mode 4, or mode 5, CSI-RS is detected in subframes 4 and 9 ;
- a CSI-RS detecting device comprising:
- a detecting module configured to detect the CSI-RS in other downlink subframes except the special subframe, the downlink subframe that transmits the control information, and the downlink subframe that transmits the system information.
- a CSI-RS detecting device comprising:
- the detecting module is configured to: when the sending period of the CSI-RS is 5 ms, in the case that the current uplink and downlink time slot configuration mode is mode 1, mode 2, mode 4 or mode 5, in subframes 4 and 9 Frame detection CSI-RS;
- the transmission period of the CSI-RS is 10 ms, in the case where the current uplink and downlink time slot configuration mode is mode 1, mode 2, mode 3, mode 4, mode 5, or mode 6, CSI- is detected in subframe 9 RS.
- the embodiment of the present invention Compared with the prior art, the embodiment of the present invention has the following advantages: the embodiment of the present invention avoids conflicts between the CSI-RS and the control information, system information, and information carried by the special subframe; and sends the downlink of the CSI-RS.
- the fixed position of the frame saves signaling overhead, simplifies scheduling of CSI-RS subframes, and reduces hardware implementation complexity.
- FIG. 1 is a flowchart of a method for transmitting a CSI-RS according to Embodiment 1 of the present invention
- FIG. 2 is a flowchart of a method for detecting a CSI-RS according to Embodiment 2 of the present invention
- FIG. 3 is a schematic structural diagram of a CSI-RS transmitting apparatus according to Embodiment 3 of the present invention
- FIG. 4 is a schematic structural diagram of a CSI-RS transmitting apparatus according to Embodiment 4 of the present invention
- FIG. 6 is a schematic structural diagram of a CSI-RS detecting apparatus according to Embodiment 6 of the present invention
- FIG. detailed description is a schematic structural diagram of a CSI-RS transmitting apparatus according to Embodiment 3 of the present invention.
- FIG. 4 is a schematic structural diagram of a CSI-RS transmitting apparatus according to Embodiment 4 of the present invention
- FIG. 6 is a schematic structural diagram of a CSI-RS detecting apparatus according to Embodiment 6 of the present invention
- the standardization has determined that the CSI-RS overhead is 1 Resource Element (RE) / Port (Port) / Physical Resource Block (PRB), but the specific design of the CSI-RS pattern (Pattern) has not yet been determine. Therefore, the CSI-RSs of the 8 antenna ports (Ports) of the same cell can be sent to the same downlink subframe, that is, the CSI-RS pattern containing 8 Ports is designed in the same PRB instead of 8 CSI-RS ports are spread across multiple sub-frame transmissions.
- the CSI-RS overhead is 1 Resource Element (RE) / Port (Port) / Physical Resource Block (PRB)
- the specific design of the CSI-RS pattern (Pattern) has not yet been determine. Therefore, the CSI-RSs of the 8 antenna ports (Ports) of the same cell can be sent to the same downlink subframe, that is, the CSI-RS pattern containing 8 Ports is designed in the same PRB instead of 8 CSI-RS ports are spread across multiple sub-frame transmissions.
- each cell may be configured to send a CSI-RS to the UE in only one available downlink subframe, and send The position of the downlink subframe of the CSI-RS (ie, the subframe number) is fixed.
- TDD Time Division Duplex
- 3GPP 3rd Generation Partnership Project
- Table 1 Uplink and downlink slot configuration table in TDD system
- the D indicates the configured downlink subframe
- U indicates the configured uplink subframe
- S indicates the configured special subframe.
- the uplink and downlink switching point period is 5 ms, corresponding to the TDD subframe 1 and subframe 6, and the switching point period is Corresponding to TDD No. 1 subframe at 10ms).
- UL-DL Configuration 0 corresponds to the minimum number of DL subframes (2)
- UL-DL configuration 5 corresponds to the maximum number of DL subframes (8).
- the special subframe S can be configured as 1 (Configuration 3/4/5) or 2 (Configuration 0/1/2/6) within 10ms.
- the special subframe S may include a downlink pilot time slot (Downlink Pilot Time, where the DwPTS is used to transmit the DMRS of the Release 9 (R9) / R10 UE, and pass the 3rd orthogonal frequency division.
- the Orthogonal Frequency Division Multiplexing (OFDM) symbol transmits the Primary Synchronous Signal (PSS), and the CSI-RS cannot collide with the synchronization channel and the DMRS resources. Therefore, there is not enough space in the special subframe to send the CSI- RS, if the CSI-RS is inserted into the DwPTS, the overhead of the RS in the special time slot is too large.
- OFDM Orthogonal Frequency Division Multiplexing
- the CSI-RS should not be transmitted in the special subframe, but the CSI-RS should be transmitted through the downlink subframe.
- the DL subframes in different UL-DL configurations are different.
- the DL subframes for transmitting CSI-RSs are bound by the configuration.
- the DL subframes for transmitting CSI-RSs need to be determined separately for different UL-DL configurations.
- control channel resource includes a Physical Broadcast Channel (PBCH), a PSS, and a secondary synchronization signal ( Secondary Synchronous Signal (SSS), Paging Channel (PCH), and system information SIB-1.
- PBCH Physical Broadcast Channel
- PSS PSS
- SSS Secondary Synchronous Signal
- PCH Paging Channel
- SIB-1 system information SIB-1.
- the specific location of the PBCH in the TDD radio frame is the first 4 OFDM symbols of slot 1 of the 0th subframe, occupying 72 subcarriers (6 RBs) in the center of the system bandwidth, and excluding the RE occupied by the CRS. Therefore, in order to avoid collision between CSI-RS and PBCH, when transmitting CSI-RS in the full band, the subframe 0 of each radio frame should be avoided.
- the PSS is mapped to the third OFDM symbol of the DwPTS of subframe 1 and subframe 6 (special subframe); the SSS is distributed in the last OFDM symbol of slotl and slotll, ie subframe 0 and 5 The last OFDM symbol of the number subframe.
- the PSS/SSS is mapped to the six consecutive PRBs of the bandwidth center of the determined OFDM symbol position. Since the length of the PSS/SSS sequence is 62, it is mapped to the middle 62 carriers of the 6 PRBs in the center of the symbol, and the frequency domain is 5 subcarriers are reserved on each side. Therefore, when transmitting CSI-RS in the full-band, to avoid collision between CSI-RS and SSS, avoid subframe 0; when the UL-DL switching point period is 5 ms, there are 2 special in one radio frame. For subframes, the CSI-RS should avoid subframe 5 (at least avoid the last OFDM symbol of subframe 5) to avoid collisions with SSS.
- the period of the PCH can be 32, 64, 128 or
- each UE uniquely determines a paging subframe within a paging radio frame period, and the paging subframe may correspond to 0 One of the sub-frame, the first sub-frame, the fifth sub-frame, and the sixth sub-frame. Therefore, if the CSI-RS is transmitted in the full frequency band, the paging subframes configured for the paging channel, that is, the 0th subframe, the 1st subframe, the 5th subframe, and the 6th subframe should be avoided to avoid the PCH. conflict.
- the 3GPP 36.331 protocol stipulates that the system information includes a MIB (Master Information Block) and a plurality of SIBs (System Information Blocks).
- SIB-1 is applied to fixed scheduling with 80 ms period and retransmission in 80 ms.
- the DL subframe resources used to transmit the CSI-RS are also different for different UL-DL configurations.
- the DL subframe that can be used to transmit the CSI-RS includes: subframe 4 and subframe 9 in UL-DL configuration 1, subframe 3, subframe 4, and number 8 in UL-DL configuration 2.
- a downlink subframe that can be used to transmit a CSI-RS under different UL-DL configurations can be described as follows:
- (1) UL-DL configuration 0 Since there are only 2 DL subframes and are distributed in subframes 0 and 5, there are not enough resources to transmit CSI-RS. Even if the CSI-RS is sent in this configuration, it can only be transmitted in subframe 5, and must be constrained on the scheduling to avoid collision between CSI-RS and control channel.
- CSI-RS can be transmitted in subframes 4 and 9.
- UL-DL configuration 2 The CSI-RS can be transmitted in subframes 3, 4, 8, and 9.
- CSI-RS may be transmitted in subframes 7 and 8 and subframe 9; if subframe 6 is not configured for searching For the channel, the CSI-RS can be transmitted in subframes 6, 7 and 8, and subframe 9.
- CSI-RS can be transmitted in subframes 4, 7 and 8 and subframe 9;
- the frame is not configured for the paging channel, and the CSI-RS can be transmitted in subframes 4, 6, subframe 7, subframe 8, and subframe 9.
- CSI-RS can be sent in subframes 3, 4, 7 and 8, and subframe 9 If the subframe 6 is not configured for the paging channel, the CSI-RS may be transmitted in subframes 3, 4, 6, 6, 7, 8, and 9 subframes.
- the CSI-RS can be transmitted in subframe 9.
- the UL-DL configuration ( 1-6 ) can support 10ms.
- CSI-RS transmission period and uses C-RS to transmit CSI-RS;
- UL-DL configuration 1 , 2, 4, 5 can support CSI-RS transmission period of 5ms, and transmit using subframes 4 and 9 CSI-RS.
- FIG. 1 it is a flowchart of a method for transmitting a CSI-RS according to Embodiment 1 of the present invention, which includes the following steps:
- Step 101 Notify the user equipment of the current uplink and downlink time slot configuration mode and the CSI-RS transmission period.
- the configuration mode of the current uplink and downlink time slot configuration mode and the CSI-RS transmission period is a semi-static configuration, and the configuration period is greater than the CSI-RS transmission period.
- the transmission period of the CSI-RS is usually 10ms or 5ms, and the configuration period of the uplink and downlink slot configuration mode can be 80ms.
- this step is a preferred step of the embodiment of the present invention.
- the current uplink and downlink time slot configuration mode and CSI may not be used. -RS transmission cycle notification.
- Step 102 Send the CSI-RS by using a downlink subframe other than the special subframe, the downlink subframe that transmits the control information, and the downlink subframe that transmits the system information.
- the downlink subframe for transmitting the control information may include a downlink subframe for transmitting the synchronization sequence, a downlink subframe configured for the PBCH, and a downlink subframe configured for the PCH, where the downlink subframe for transmitting the system information may include the identifier for transmitting the SIB.
- the downlink subframe of -1 may include a downlink subframe for transmitting the synchronization sequence, a downlink subframe configured for the PBCH, and a downlink subframe configured for the PCH, where the downlink subframe for transmitting the system information may include the identifier for transmitting the SIB.
- the CSI-RS is transmitted through the subframes 4 and/or 9.
- the CSI-RS is transmitted through subframes 3, 4, 8, and/or 9.
- the current uplink and downlink time slot configuration mode is mode 3
- the CSI-RS is transmitted through the subframes 7, 8, and 9; if the subframe 6 is not configured For the PCH, the CSI-RS is transmitted through subframes 6, 7, 8, and 9.
- the current uplink and downlink time slot configuration mode is mode 4
- the CSI-RS is transmitted through the subframes 4, 7, 8, and 9
- the frame is not configured for the PCH, and the CSI-RS is transmitted through subframes 4, 6, 7, 8, and 9.
- the current uplink and downlink time slot configuration mode is mode 5
- the subframe 6 is configured to the PCH
- the CSI-RS is transmitted through the subframes 3, 4, 7, 8, and 9
- the subframe 6 is not configured for the PCH, and the CSI-RS is transmitted through the subframes 3, 4, 6, 7, 8, and 9.
- the CSI-RS is transmitted through the subframe 9
- the CSI-RS can also be sent in the following manner:
- the transmission period of the CSI-RS is 5 ms
- the current uplink and downlink time slot configuration mode is mode 1, mode 2, mode 4, or mode 5
- the CSI-RS is transmitted through the subframe 4 and the subframe 9
- the CSI-RS transmission period is 10 ms
- the current uplink and downlink time slot configuration mode is mode 1, mode 2, mode 3, mode 4, mode 5, or mode 6, CSI is transmitted through subframe 9 -RS.
- the embodiment of the present invention avoids the conflict between the CSI-RS and the control information, the system information, and the information carried by the special subframe; and the location of the downlink subframe that sends the CSI-RS is fixed, which saves signaling overhead and simplifies CSI-
- the scheduling of RS subframes reduces the hardware implementation complexity.
- FIG. 2 it is a flowchart of a method for detecting a CSI-RS according to Embodiment 2 of the present invention, which includes the following steps:
- Step 201 Acquire a current uplink and downlink time slot configuration mode and a CSI-RS transmission period.
- the configuration mode of the current uplink and downlink time slot configuration mode and the CSI-RS transmission period is a semi-static configuration, and the configuration period is greater than the CSI-RS transmission period.
- the transmission period of the CSI-RS is usually 10ms or 5ms, and the configuration period of the uplink and downlink slot configuration mode can be 80ms.
- this step is a preferred step of the embodiment of the present invention.
- the current uplink and downlink time slot configuration mode and CSI may not be acquired. -RS transmission period.
- Step 202 Detect the CSI-RS in other downlink subframes except the special subframe, the downlink subframe that transmits the control information, and the downlink subframe that transmits the system information.
- the downlink subframe configured for the PBCH and the downlink subframe configured for the PCH; the downlink subframe for transmitting the system information may include a downlink subframe used for transmitting the SIB-1.
- the CSI-RS is detected in subframes 4 and/or 9.
- the CSI-RS is detected in subframes 3, 4, 8, and/or 9.
- the current uplink and downlink time slot configuration mode is mode 3
- the CSI-RS is detected in subframes 7, 8, and 9; if the subframe 6 is not configured.
- the CSI-RS is detected in subframes 6, 7, 8, and 9.
- the current uplink and downlink time slot configuration mode is mode 4
- the CSI-RS is detected in the subframes 4, 7, 8, and 9;
- the frame is not configured for the PCH, and the CSI-RS is detected in the 4th, 6th, 7th, 8th, and/or 9th subframes.
- the current uplink and downlink time slot configuration mode is mode 5
- the subframe 6 is configured to the PCH
- the CSI-RS is detected in the subframes 3, 4, 7, 8, and 9;
- the subframe 6 is not configured for the PCH, and the CSI-RS is detected in subframes 3, 4, 6, 7, 8, and 9.
- the CSI-RS is detected in the subframe 9th.
- the CSI-RS can also be detected in the following manner:
- the transmission period of the CSI-RS is 5 ms, in the case where the current uplink and downlink time slot configuration mode is mode 1, mode 2, mode 4, or mode 5, CSI-RS is detected in subframes 4 and 9
- the CSI-RS transmission period is 10 ms, in the case where the current uplink and downlink time slot configuration mode is mode 1, mode 2, mode 3, mode 4, mode 5 or mode 6, CSI is detected in subframe 9 -RS.
- the embodiment of the present invention avoids the conflict between the CSI-RS and the control information, the system information, and the information carried by the special subframe.
- the location of the downlink subframe of the CSI-RS is fixed, the signaling overhead is saved, and the CSI is simplified.
- - Scheduling of RS subframes reduces hardware implementation complexity.
- the embodiment of the present invention provides a method for transmitting a CSI-RS in the foregoing embodiment. Accordingly, the embodiment of the present invention further provides an apparatus for applying the foregoing CSI-RS transmission method.
- FIG. 3 it is a schematic structural diagram of a CSI-RS transmitting apparatus according to Embodiment 3 of the present invention. include:
- the sending module 310 is configured to send the CSI-RS by using a downlink subframe other than the special subframe, the downlink subframe that transmits the control information, and the downlink subframe that transmits the system information.
- the downlink subframe for transmitting the control information may include a downlink subframe used for transmitting the synchronization sequence, a downlink subframe configured for the PBCH, and a downlink subframe configured for the PCH.
- the downlink subframe for transmitting the system information may include the identifier for transmitting the SIB.
- the downlink subframe of -1 may include a downlink subframe used for transmitting the synchronization sequence, a downlink subframe configured for the PBCH, and a downlink subframe configured for the PCH.
- the downlink subframe for transmitting the system information may include the identifier for transmitting the SIB.
- the sending module 310 is configured to send the CSI-RS through the subframes 4 and/or 9 when the current uplink and downlink time slot configuration mode is mode 1.
- the CSI-RS is transmitted through subframes 3, 4, 8, and/or 9.
- the current uplink and downlink time slot configuration mode is mode 3
- the CSI-RS is transmitted through the subframes 7, 8, and 9; if the subframe 6 is not configured.
- the CSI-RS is transmitted through subframes 6, 7, 8, and 9.
- the current uplink and downlink time slot configuration mode is mode 4
- the CSI-RS is transmitted through the subframes 4, 7, 8, and 9;
- the frame is not configured for the PCH, and the CSI-RS is transmitted through subframes 4, 6, 7, 8, and 9.
- the current uplink and downlink time slot configuration mode is mode 5
- the subframe 6 is configured to the PCH
- the CSI-RS is transmitted through the subframes 3, 4, 7, 8, and 9;
- the subframe 6 is not configured for the PCH, and the CSI-RS is transmitted through the subframes 3, 4, 6, 7, 8, and 9.
- the CSI-RS is transmitted through the subframe 9th.
- the sending module 310 is configured to: when the sending period of the CSI-RS is 5 ms, in the case that the current uplink and downlink time slot configuration mode is mode 1, mode 2, mode 4, or mode 5, pass the subframe 4 And transmitting CSI-RS in subframe 9; when the transmission period of CSI-RS is 10 ms, the current uplink and downlink slot configuration mode is mode 1, mode 2, mode 3, mode 4, mode 5, or mode 6. Next, the CSI-RS is transmitted through the subframe 9th.
- the above device may further include:
- the notification module 320 is configured to notify the user equipment of the current uplink and downlink time slot configuration mode and the CSI-RS transmission period.
- the embodiment of the present invention avoids the conflict between the CSI-RS and the control information, the system information, and the information carried by the special subframe; and the location of the downlink subframe that sends the CSI-RS is fixed, which saves signaling overhead and simplifies CSI-
- the scheduling of RS subframes reduces the hardware implementation complexity.
- FIG. 4 it is a schematic structural diagram of a CSI-RS transmitting apparatus according to Embodiment 4 of the present invention, which includes:
- the sending module 410 is configured to: when the current uplink and downlink time slot configuration mode is mode 1, mode 2, mode 4, or mode 5, when the CSI-RS transmission period is 5 ms, pass the 4th subframe and the 9th The CSI-RS is transmitted in the subframe; when the transmission period of the CSI-RS is 10 ms, in the case that the current uplink and downlink time slot configuration mode is mode 1, mode 2, mode 3, mode 4, mode 5 or mode 6, The 9th subframe transmits a CSI-RS.
- the notification module 420 is configured to notify the user equipment of the current uplink and downlink time slot configuration mode and the CSI-RS transmission period.
- the embodiment of the present invention avoids the conflict between the CSI-RS and the control information, the system information, and the information carried by the special subframe; and the location of the downlink subframe that sends the CSI-RS is fixed, which saves signaling overhead and CSI - Scheduling of RS subframes reduces hardware implementation complexity.
- FIG. 5 it is a schematic structural diagram of a CSI-RS detecting apparatus according to Embodiment 5 of the present invention, which includes:
- the detecting module 510 is configured to detect the CSI-RS in other downlink subframes except the special subframe, the downlink subframe that transmits the control information, and the downlink subframe that transmits the system information.
- the downlink subframe configured for the PBCH and the downlink subframe configured for the PCH; the downlink subframe for transmitting the system information may include a downlink subframe used for transmitting the SIB-1.
- the detecting module 510 is configured to detect, in the case that the current uplink and downlink time slot configuration mode is mode 1, detecting CSI-RS in subframes 4 and/or 9;
- the current uplink and downlink time slot configuration mode is mode 2, in numbers 3, 4, 8, and / Or the subframe 9 detection CSI-RS;
- the current uplink and downlink time slot configuration mode is mode 3
- the CSI-RS is detected in subframes 7, 8, and 9; if the subframe 6 is not configured.
- For the PCH detect the CSI-RS in subframes 6, 7, 8, and 9 or 9;
- the current uplink and downlink time slot configuration mode is mode 4
- the CSI-RS is detected in the subframes 4, 7, 8, and 9;
- the frame is not configured for the PCH, and the CSI-RS is detected in the subframes 4, 6, 7, 8, and 9.
- the current uplink and downlink time slot configuration mode is mode 5
- the CSI-RS is detected in the subframes 3, 4, 7, 8, and 9
- the subframe 6 is not configured for the PCH, and the CSI-RS is detected in subframes 3, 4, 6, 7, 8, and 9; in the case where the current uplink and downlink slot configuration mode is mode 6 Next, the CSI-RS is detected in the subframe 9th.
- the detecting module 510 is configured to: when the sending period of the CSI-RS is 5 ms, in the case that the current uplink and downlink time slot configuration mode is mode 1, mode 2, mode 4 or mode 5, in subframe 4 And detecting the CSI-RS in the subframe 9; when the transmission period of the CSI-RS is 10 ms, the current uplink and downlink time slot configuration mode is mode 1, mode 2, mode 3, mode 4, mode 5, or mode 6. Next, the CSI-RS is detected in subframe 9.
- the above device may further include:
- the obtaining module 520 is configured to obtain a current uplink and downlink time slot configuration mode and a CSI-RS transmission period, and is used by the detecting module 510.
- the embodiment of the present invention avoids conflicts between the CSI-RS and the control information, the system information, and the information carried by the special subframe.
- the location of the downlink subframe of the CSI-RS is fixed, which saves signaling overhead and simplifies CSI-
- the scheduling of RS subframes reduces the hardware implementation complexity.
- FIG. 6 is a schematic structural diagram of a CSI-RS detecting apparatus according to Embodiment 6 of the present invention, including:
- the detecting module 610 is configured to: when the sending period of the CSI-RS is 5 ms, in the case that the current uplink and downlink time slot configuration mode is mode 1, mode 2, mode 4, or mode 5, in subframes 4 and 9 Sub-frame detection CSI-RS; when the CSI-RS transmission period is 10 ms, the current uplink and downlink time slots are allocated.
- the mode is Mode 1, Mode 2, Mode 3, Mode 4, Mode 5, or Mode 6, the CSI-RS is detected in subframe 9.
- the obtaining module 620 is configured to obtain a current uplink and downlink time slot configuration mode and a CSI-RS transmission period for use by the detecting module 610.
- the embodiment of the present invention avoids the conflict between the CSI-RS and the control information, the system information, and the information carried by the special subframe.
- the location of the downlink subframe of the CSI-RS is fixed, the signaling overhead is saved, and the CSI is simplified.
- - Scheduling of RS subframes reduces hardware implementation complexity.
- the present invention can be implemented by means of software plus a necessary general hardware platform, and of course, can also be through hardware, but in many cases, the former is a better implementation. the way.
- the technical solution of the embodiments of the present invention may be embodied in the form of a software product in essence or in the form of a software product stored in a storage medium, including
- the method described in various embodiments of the present invention is performed such that a terminal device (which may be a mobile phone, a personal computer, a server, or a network device, etc.).
- modules in the apparatus in the embodiments may be distributed in the apparatus of the embodiment according to the description of the embodiments, or may be correspondingly changed in one or more apparatuses different from the embodiment.
- the modules of the above embodiments may be integrated into one or may be deployed separately; they may be combined into one module, or may be further split into multiple sub-modules.
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Abstract
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Priority Applications (3)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| US13/810,207 US9451602B2 (en) | 2010-07-15 | 2011-07-04 | CSI-RS transmission method and detection method and apparatuses thereof |
| KR1020137003561A KR101530138B1 (ko) | 2010-07-15 | 2011-07-04 | Csi-rs 송신 방법, 검출 방법 및 장치 |
| EP11806273.6A EP2595336A4 (en) | 2010-07-15 | 2011-07-04 | A csi-rs transmission method, inspection method and device thereof |
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201010232079.2A CN102340379B (zh) | 2010-07-15 | 2010-07-15 | 一种csi-rs的发送方法、检测方法及其装置 |
| CN201010232079.2 | 2010-07-15 |
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| Publication Number | Publication Date |
|---|---|
| WO2012006931A1 true WO2012006931A1 (zh) | 2012-01-19 |
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| PCT/CN2011/076802 Ceased WO2012006931A1 (zh) | 2010-07-15 | 2011-07-04 | 一种csi-rs的发送方法、检测方法及其装置 |
Country Status (5)
| Country | Link |
|---|---|
| US (1) | US9451602B2 (zh) |
| EP (1) | EP2595336A4 (zh) |
| KR (1) | KR101530138B1 (zh) |
| CN (1) | CN102340379B (zh) |
| WO (1) | WO2012006931A1 (zh) |
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| CN103945449B (zh) * | 2013-01-18 | 2018-12-04 | 中兴通讯股份有限公司 | Csi测量方法和装置 |
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Also Published As
| Publication number | Publication date |
|---|---|
| EP2595336A1 (en) | 2013-05-22 |
| US9451602B2 (en) | 2016-09-20 |
| CN102340379A (zh) | 2012-02-01 |
| KR20130028146A (ko) | 2013-03-18 |
| KR101530138B1 (ko) | 2015-06-29 |
| EP2595336A4 (en) | 2017-06-07 |
| CN102340379B (zh) | 2015-04-22 |
| US20130114560A1 (en) | 2013-05-09 |
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