WO2012113345A1 - 用于载波聚合系统的通信方法和装置 - Google Patents
用于载波聚合系统的通信方法和装置 Download PDFInfo
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- WO2012113345A1 WO2012113345A1 PCT/CN2012/071592 CN2012071592W WO2012113345A1 WO 2012113345 A1 WO2012113345 A1 WO 2012113345A1 CN 2012071592 W CN2012071592 W CN 2012071592W WO 2012113345 A1 WO2012113345 A1 WO 2012113345A1
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- subframe
- downlink
- uplink
- primary cell
- ack
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Classifications
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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
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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
- H04L1/12—Arrangements for detecting or preventing errors in the information received by using return channel
- H04L1/16—Arrangements for detecting or preventing errors in the information received by using return channel in which the return channel carries supervisory signals, e.g. repetition request signals
- H04L1/18—Automatic repetition systems, e.g. Van Duuren systems
- H04L1/1829—Arrangements specially adapted for the receiver end
- H04L1/1854—Scheduling and prioritising arrangements
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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
- H04L1/12—Arrangements for detecting or preventing errors in the information received by using return channel
- H04L1/16—Arrangements for detecting or preventing errors in the information received by using return channel in which the return channel carries supervisory signals, e.g. repetition request signals
- H04L1/18—Automatic repetition systems, e.g. Van Duuren systems
- H04L1/1867—Arrangements specially adapted for the transmitter end
- H04L1/1887—Scheduling and prioritising arrangements
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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
- H04L5/0055—Physical resource allocation for ACK/NACK
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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
- H04L5/14—Two-way operation using the same type of signal, i.e. duplex
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W72/00—Local resource management
- H04W72/04—Wireless resource allocation
- H04W72/044—Wireless resource allocation based on the type of the allocated resource
- H04W72/0446—Resources in time domain, e.g. slots or frames
-
- 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
Definitions
- the base station and the user equipment perform communication and data transmission on one carrier.
- the base station performs scheduling on the UE by using a Physical Downlink Control Channel (PDCCH).
- the PDCCH may be a downlink scheduling grant (DL_grant) or an uplink scheduling grant (UL_grant) information, and respectively carry a physical downlink shared channel (PDSCH) (Physical Downlink Shared Channel). Or scheduling information such as time-frequency resource allocation of the physical uplink shared channel PUSCH (Physical Uplink Shared Channel).
- the UE After receiving and decoding the PDCCH, the UE receives the downlink data PDSCH or sends the uplink data PUSCH according to the scheduling information carried by the UE, and then the UE feeds back uplink ACK/NACK (AN) to the downlink data, where the feedback ACK indicates acknowledgement of receiving or receiving. If the NACK indicates that the receiving or receiving failure is not confirmed, the base station will also feed back the downlink AN to the uplink data after receiving the uplink data.
- the PDCCH has a certain timing relationship with its scheduled PDSCH or PUSCH, and the PDSCH and its corresponding uplink AN, that is, the timing relationship.
- the enhanced Long Term Evolution (LTE-A) system introduces Carrier Aggregation (CA) technology, that is, multiple component carriers (Component Carrier, CC) is simultaneously assigned to one UE for supporting higher data rate transmission.
- CA Carrier Aggregation
- the LTE version 10 (Release 10, R10) system configures multiple carriers for the UE, including a pair of uplink and downlink primary carriers (Primary CCs, PCCs), and the remaining carriers are secondary carriers (secondary CC, SCO, PCC is also called the primary The cell (PCell, Primary Cell), the SCC is also called the secondary cell (SCell), and the uplink AN of the UE can only be sent on the uplink PCell.
- the LTE R10 system supports the cross.
- Carrier scheduling that is, transmitting PDCCHs of multiple carriers of a scheduling UE to one or several carriers, such as a PCell.
- the uplink and downlink configurations of the PCell and the SCell are different. Therefore, according to the timing relationship corresponding to the Scell, the communication between the Scell and the UE may not be performed normally.
- a main object of embodiments of the present invention is to provide a communication method and apparatus for a CA system, which can effectively ensure normal communication between a base station and a UE.
- an embodiment of the present invention provides a communication method for a CA system, including:
- the ACK/NACK feedback of the PDSCH information that is sent is performed on the subframe m or the subframe p of the primary cell, where the m is according to the primary a subframe index of a subframe of an ACK/NACK of a PDSCH of a subframe n of the primary cell, which is determined by an ACK/NACK timing relationship corresponding to a subframe n of the cell, where the p is in accordance with the auxiliary a subframe index of a subframe of an ACK/NACK of a PDSCH of a subframe n of the secondary cell, which is determined by an ACK/NACK timing relationship corresponding to a subframe n of a cell;
- n, m, and p are subframe indexes.
- an embodiment of the present invention provides a communication method for a CA system, including: receiving physical downlink shared channel PDSCH information that is sent by a base station through a subframe n of a secondary cell;
- the ACK of the PDSCH information that is sent is performed on the subframe p of the primary cell.
- NACK feedback or, if the subframe p on the primary cell is a downlink subframe, according to a preset or notification by the base station, the preset on the primary cell or the notification of the base station Performing ACK/NACK feedback of the downlink PDSCH information on the specified uplink subframe; the p is determined according to the ACK/NACK timing relationship corresponding to the subframe n of the secondary cell, and the feedback is performed in the secondary cell
- an embodiment of the present invention provides a communication method for a CA system, including:
- the ACK of the PDSCH information that is sent is performed on the subframe p of the primary cell. Or NACK feedback; or, if the subframe p on the primary cell is a downlink subframe, according to a preset or notification by the base station, the preset on the primary cell or the notification of the base station Performing the PDSCH information that is sent on the specified uplink subframe.
- the p is a subframe that is used to feed back the ACK/NACK of the PDSCH of the subframe n of the secondary cell in the secondary cell according to the ACK/NACK timing relationship corresponding to the subframe n of the secondary cell.
- the subframe index, n, p is the subframe index.
- an embodiment of the present invention provides a communication method for a CA system, including:
- the subframe n of the primary cell is an uplink subframe
- the user equipment is received in the subframe p sent by the primary cell.
- ACK/NACK feedback of the transmitted PDSCH information or, if the subframe p on the primary cell is a downlink subframe, receiving the user equipment according to a preset or a notification of a base station, the Determining ACK/NACK feedback of the downlink PDSCH information sent by the uplink subframe specified by the notification of the base station, where the p is an ACK/NACK corresponding to the subframe n of the secondary cell
- the sub-frames of the subframes of the ACK/NACK of the PDSCH of the subframe n of the secondary cell determined by the timing relationship are determined by the timing relationship, and n and p are subframe indexes.
- the communication method for the CA system provided by the embodiment of the present invention can effectively ensure the normal feedback of the uplink AN corresponding to the SCell in the CA system with different uplink and downlink configurations, thereby effectively ensuring the base station and The UEs communicate normally.
- embodiments of the present invention further provides a communication method for a CA system, comprising: generating a secondary cell for an uplink sub-frame n user apparatus performs scheduling PUSCH scheduling information UL_gr an t; if the main cell for uplink subframe, the primary cell by the sub-frame or subframe n q subframes transmitted the PUSCH y UL_ gra nt scheduling information to the user equipment, wherein, q is the primary cell according to the a subframe index of a subframe in which the scheduling information UL_grant of the PUSCH of the subframe n of the primary cell is transmitted, and the y is a UL_grant timing corresponding to the subframe n of the secondary cell, determined by the UL_grant timing relationship corresponding to the subframe n a subframe index of a subframe in which the scheduling information UL_grant of the PUSCH of the subframe n of the secondary cell is transmitted; or, when the subframe n of the primary cell
- an embodiment of the present invention further provides a communication method for a CA system, including: if a subframe n of a primary cell is an uplink subframe:
- scheduling information UL_grant of the PUSCH information of the subframe n of the secondary cell that is sent by the base station in the subframe q or the subframe y of the primary cell, where the q is corresponding to the subframe n of the primary cell.
- the subframe index of the subframe in which the scheduling information UL_grant of the PUSCH of the subframe n of the primary cell is transmitted is determined by the UL_grant timing relationship, and the y is the transmission determined according to the UL_grant timing relationship corresponding to the subframe n of the secondary cell.
- the receiving the base station sends the subframe y sent on the subframe y of the primary cell.
- the scheduling information of the PUSCH information of the subframe n of the secondary cell is migrant; or, if the subframe y on the primary cell is an uplink subframe, receiving the base station on the primary cell according to a preset or notification from a base station
- the scheduling information migrant of the PUSCH of the subframe n of the secondary cell that is sent in the downlink subframe specified by the notification by the base station is preset; wherein the y is a subframe n according to the secondary cell a sub-frame index of a subframe of the scheduling information UL_grant of the PUSCH of the subframe n of the secondary cell determined by the corresponding UL_grant timing relationship; where n, q, and y are subframe indexes;
- the PUSCH is transmitted on the subframe n of the secondary cell according to the scheduling information UL_grant of the PUSCH.
- an embodiment of the present invention provides a UE for a CA system, including:
- a receiving unit configured to receive PDSCH information that is sent by the base station through the subframe n of the SCell;
- subframe n of the PCell is a downlink subframe:
- subframe n of the PCell is an uplink subframe:
- the downlink is performed on the subframe p of the PCell.
- n, m, and p are subframe indexes.
- an embodiment of the present invention provides a base station for a CA system, including:
- a sending unit configured to send PDSCH information to the UE by using a subframe n of the SCell
- Receiving unit for:
- subframe n of the PCell is a downlink subframe:
- subframe n of the PCell is an uplink subframe:
- the subframe p on the PCell is an uplink subframe
- the p is a downlink subframe, and receives the downlink PDSCH that is sent by the UE according to a preset or a notification of the base station, on the PCell, the preset, or an uplink subframe specified by the notification of the base station.
- n, m, and p are subframe indexes.
- an embodiment of the present invention provides a method for a CA system, including,
- an embodiment of the present invention provides a method for a CA system, including,
- the physical downlink shared channel (PDSCH) information that is sent to the user equipment by the subframe n of the secondary cell, and the ACK/NACK corresponding to the downlink PDSCH information that is fed back by the user equipment is received on the subframe k of the primary cell.
- k is a subframe of the subframe of the ACK/NACK corresponding to the subframe n of the secondary cell that is determined by the user equipment according to the ACK/NACK timing relationship of the first reference TDD uplink and downlink configuration. Index.
- an embodiment of the present invention provides a user equipment for a CA system, including:
- a receiving unit configured to receive physical downlink shared channel PDSCH information that is sent by the base station through the subframe n of the secondary cell;
- a processing unit configured to: according to the ACK/NACK timing relationship of the first reference TDD uplink and downlink configuration, the subframe index k of the subframe corresponding to the ACK/NACK corresponding to the subframe n of the secondary cell in the primary cell;
- a sending unit configured to perform ACK/NACK feedback corresponding to the PDSCH information received by the receiving unit on the subframe k of the primary cell determined by the processing unit.
- an embodiment of the present invention provides a base station for a CA system, including:
- a sending unit configured to transmit physical downlink shared channel PDSCH information to the user equipment by using a subframe n of the secondary cell;
- a receiving unit configured to receive an ACK/NACK corresponding to the PDSCH information received by the receiving unit, which is sent by the user equipment, in the subframe k of the primary cell, where the k is the user equipment according to the first reference TDD uplink and downlink
- the subframe index of the subframe of the ACK/NACK corresponding to the subframe n of the secondary cell is determined by the configured ACK/NACK timing relationship.
- the UE and the base station for the CA system provided by the embodiment of the present invention can effectively ensure the normal feedback of the uplink AN corresponding to the SCell in the CA system with different uplink and downlink configurations, thereby effectively ensuring the UE. Communicate normally with the base station.
- an embodiment of the present invention provides a base station for a CA system, including:
- a generating unit configured to generate scheduling information that schedules a PUSCH of an uplink subframe n of the SCell; a scheduling unit, configured to:
- subframe n of the PCell is an uplink subframe:
- the scheduling information UL_grant of the PUSCH is sent to the UE by using the subframe q or the subframe y of the PCell, where the q is a UL_grant timing relationship corresponding to the subframe n of the PCell, and the PCell is sent.
- the subframe index of the subframe of the scheduling information UL_grant of the PUSCH of the subframe n, the y is the scheduling information of the PUSCH of the subframe n of the SCell according to the UL_grant timing relationship corresponding to the subframe n of the SCell Subframe index of the subframe;
- subframe n of the PCell is a downlink subframe:
- the subframe y on the PCell is a downlink subframe
- the scheduling information UL_grant of the PUSCH if the subframe y on the PCell is an uplink subframe, according to a preset or locally acquired message, the downlink specified by the pre-set or locally acquired message on the PCell Transmitting, to the UE, scheduling information UL_grant of the PUSCH;
- n, q, y are subframe indexes.
- an embodiment of the present invention provides a UE for a CA system, including:
- Receiving unit for:
- subframe n of the PCell is an uplink subframe:
- subframe n of the PCell is a downlink subframe:
- the subframe y on the PCell is a downlink subframe, receive the scheduling information UL_grant of the PUSCH information of the subframe n of the SCell sent by the base station on the subframe y of the PCell, if The subframe y on the PCell is an uplink subframe, and is received by the base station on the PCell, the preset, or the downlink subframe specified by the notification of the base station according to a preset or a notification from the base station. Scheduling information UL_grant of the PUSCH of the subframe n of the SCell;
- n, q, y are subframe indexes
- a sending unit configured to send the PUSCH in the subframe n of the SCell according to the scheduling information UL_grant of the PUSCH.
- the base station and the UE for the CA system provided by the embodiment of the present invention can effectively ensure the normal scheduling of the PUSCH of the SCell in the CA system with different uplink and downlink configurations, and effectively ensure the base station and the base station.
- the UEs communicate normally.
- FIG. 1 is a flow chart of a communication method according to an embodiment of the present invention.
- FIG. 2 is another flow chart of a communication method according to an embodiment of the present invention.
- FIG. 3 is a schematic diagram of an uplink and downlink configuration of a CA system according to an embodiment of the present invention
- FIG. 5 is another flowchart of a communication method according to an embodiment of the present invention.
- FIG. 6 is a schematic diagram of an uplink and downlink configuration of a CA system according to an embodiment of the present invention.
- FIG. 7 is a schematic diagram of an uplink and downlink configuration of a CA system according to an embodiment of the present invention.
- FIG. 8 is a structural block diagram of a UE according to an embodiment of the present invention.
- FIG. 9 is another structural block diagram of a UE according to an embodiment of the present invention.
- FIG. 10 is a structural block diagram of a base station according to an embodiment of the present invention.
- FIG. 11 is another structural block diagram of a base station according to an embodiment of the present invention.
- FIG. 12 is a structural block diagram of a base station according to an embodiment of the present invention.
- FIG. 13 is a structural block diagram of a UE according to an embodiment of the present invention.
- FIG. 14 is another flowchart of a communication method according to an embodiment of the present invention.
- 15 is a schematic diagram of an uplink and downlink configuration of a CA system according to an embodiment of the present invention.
- 16 is a schematic diagram of an uplink and downlink configuration of a CA system according to an embodiment of the present invention.
- FIG. 17 is a schematic diagram of an uplink and downlink configuration of a CA system according to an embodiment of the present invention.
- FIG. 18 is another structural block diagram of a UE according to an embodiment of the present invention.
- FIG. 19 is another flowchart of a communication method according to an embodiment of the present invention.
- 20 is another structural block diagram of a base station according to an embodiment of the present invention.
- 21 is another flowchart of a communication method according to an embodiment of the present invention.
- FIG. 22 is a schematic diagram of an uplink and downlink configuration of a CA system according to an embodiment of the present invention.
- FIG. 23 is a schematic diagram of an uplink and downlink configuration of a CA system according to an embodiment of the present invention.
- 24 is a schematic diagram of an uplink and downlink configuration of a CA system according to an embodiment of the present invention.
- FIG. 25 is a schematic diagram of an uplink and downlink configuration of a CA system according to an embodiment of the present invention.
- DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS The technical solutions in the embodiments of the present invention will be clearly and completely described in the following with reference to the accompanying drawings. It should be understood that the described embodiments are only a part of the embodiments of the invention, and not all of the embodiments. All other embodiments obtained by a person of ordinary skill in the art based on the embodiments of the present invention without departing from the inventive scope are the scope of the present invention.
- the embodiments of the present invention are applicable to a Time Division Duplexing (TDD) system, or a carrier aggregation system of TDD and Frequency Division Duplex (FDD).
- TDD Time Division Duplexing
- FDD Frequency Division Duplex
- the cell (Cell) in the embodiment of the present invention may also be replaced by the concept of a component carrier, such that the PCell may also be referred to as a PCC, and the SCell may also be referred to as an SCC.
- the specific uplink and downlink configuration of the LTE TDD system is shown in Table 1.
- the LTE TDD system can support seven different uplink and downlink subframe configurations from configuration 0 to configuration 6.
- one radio frame includes a subframe index. Also referred to as a subframe number, which is 10 subframes of 0 to 9, the subframe types of the subframes with the same subframe index may be the same or different.
- D indicates that the subframe is a downlink subframe
- S indicates that the subframe is a subframe.
- the special subframe can transmit downlink data
- U indicates that the subframe is an uplink subframe.
- the timing relationship between the PDSCH and its corresponding uplink AN is as shown in Table 2.
- the subframes marked with numbers in Table 2 are uplink subframes, and the numbers indicate which PDSCHs of the downlink subframes need to be fed back in the current uplink subframe.
- the uplink AN, for example, 5 and 6 in the subframe 2 of the configuration 1 indicates that the uplink subframe 2 is used to feed back the uplink ANs of the downlink subframes 5 and 6.
- Table 2 Timing relationship between PDSCH and its corresponding uplink AN Subframe index (subframe number)
- the timing relationship between the UL_grant and its scheduled PUSCH is as shown in Table 3.
- the subframes marked with numbers in Table 3 are all uplink subframes, and the number indicates which one or which downlinks of the PU_UL_grant of the PUSCH of the current uplink subframe is scheduled.
- the PUSCH of the uplink subframe 2 of the configuration 1 is scheduled by using the UL_grant transmitted on the downlink subframe 6.
- the PUSCH of the uplink subframe 2 configured with 0 can be transmitted on the downlink subframes 5 and 6. UL_grant to schedule.
- Table 3 Timing relationship between UL_grant and its scheduled PUSCH
- the uplink AN of the UE can only be sent on the uplink PCell, according to the timing relationship of the uplink AN of the SCell, the uplink AN corresponding to the SCell may not be fed back. Thereby affecting the normal communication between the base station and the UE.
- two carriers including PCell and P SCell PCell is configured for uplink and downlink
- SCell is configured for uplink and downlink.
- the AN corresponding to the two downlink subframes of the SCell 4 and 9 respectively feed back on the subframes 3 and 8, that is, the subframe to be in the PCell. 3, 8 feedback, but at this time, the AN corresponding to the 4th and 9th downlink subframes of the SCell cannot be fed back on the subframes 3 and 8 of the PCell according to the original timing, because the subframes 3 and 8 on the PCell It is a downlink subframe.
- the PDCCH of each carrier is sent to the PCell, and SCell may appear according to the timing relationship of the UL_grant of the SCell to the PUSCH.
- the PUSCH cannot be scheduled, thereby affecting normal communication between the base station and the UE.
- PCell is configured for uplink and downlink
- SCell is configured for uplink and downlink.
- the PDCCH of each carrier is sent to the PCell.
- the UL_grant of the PUSCH of the uplink subframe 2 of the SCell is scheduled to be on the downlink subframe 8, that is, the scheduling is performed on the subframe 8 of the PCell, but At this time, scheduling cannot be performed on the PCell because the subframe 8 of the PCell is an uplink subframe.
- embodiments of the present invention provide a communication method and apparatus for a CA system, which can effectively ensure normal communication between a base station and a UE.
- an embodiment of the present invention provides a communication method for a CA system, which is based on a UE.
- the PC system is configured with a PCell and an SCell, and the PCell and the SCell are configured in different uplink and downlink configurations.
- This embodiment includes the following steps:
- Step 101 Receive PDSCH information sent by the base station through the subframe n of the SCell.
- n is the subframe index.
- the subframe n of the SCell is a downlink subframe.
- the UE receives the downlink PDSCH information sent by the base station through the SCell, and then the UE performs AN feedback on the PDSCH to notify the base station whether the PDSCH information is successfully received.
- the embodiment includes:
- Step 102 Perform AN feedback of the PDSCH information that is sent in the subframe m or the subframe p of the Pcell, where the m is an AN timing relationship corresponding to the subframe n of the PCell, and the PCell is fed back in the Pcell.
- a subframe index of a subframe of the AN of the PDSCH of the frame n where the p is an AN timing relationship corresponding to the subframe n of the SCell, and an AN of the PDSCH of the subframe n of the SCell is fed back in the SCell
- the subframe index of the subframe is performed by the subframe m or the subframe p of the Pcell, where the m is an AN timing relationship corresponding to the subframe n of the PCell, and the PCell is fed back in the Pcell.
- the UE performs the AN feedback of the delivered PDSCH information on the subframe m of the Pcell.
- the sub-frame of the PCell is the downlink subframe, and the PDSCH to the AN timing of the subframe n of the PCell is fed back to the AN of the PDSCH of the subframe n of the PCell, that is, the subframe of the PCell.
- the UE can perform the feedback of the AN of the PDSCH of the subframe n of the SCell through the subframe m of the PCell, that is, the UE and the UE can be effectively guaranteed. Normal communication.
- the subframe p of the SCell is fed back to the AN of the PDSCH of the subframe n of the SCell, and the subframe p on the PCell is also the uplink subframe, and the UE can also pass the PCell sub-frame.
- the frame p performs feedback of the AN of the PDSCH of the subframe n of the SCell. Therefore, optionally, in this step, the UE may perform AN feedback of the delivered PDSCH information on the subframe p of the PCell.
- the UE may also select one subframe in the subframe m and the subframe p of the PCell to perform AN feedback of the PDSCH information that is sent, specifically, And selecting, in the subframe m and the subframe p of the PCell, a subframe in which the AN feedback delay of the PDSCH information that is sent is the smallest is performed according to the delay of the AN feedback of the PDSCH information that is sent, and performing the AN feedback of the transmitted PDSCH information. It should be noted that, because the base station or the UE needs a certain processing time, the delay of the AN feedback of the delivered PDSCH information cannot be less than 4 subframes.
- the embodiment includes:
- Step 103 If the subframe p on the PCell is an uplink subframe, perform AN feedback on the PDSCH information that is sent on the subframe p of the PCell.
- the subframe p on the PCell is a downlink subframe, according to a preset or notification by the base station, the foregoing uplink subframe that is preset or specified by the notification of the base station is performed on the PCell.
- the UE may perform AN feedback of the delivered PDSCH information on an uplink subframe in which the AN feedback delay of the PDSCH information is the smallest in the PCell according to a preset or a notification from the base station.
- the UE can also pass the subframe of the PCell.
- p performs feedback of the AN of the PDSCH of the subframe n of the SCell. If the subframe p of the PCell is a downlink subframe, the sending is performed on the PCell, the preset, or an uplink subframe specified by the notification of the base station according to a preset or notification by the base station. AN feedback for PDSCH information.
- the normal feedback of the AN feedback of the PDSCH of the subframe n of the Scell can be effectively ensured, thereby ensuring effective communication between the base station and the UE. It should be noted that, in the embodiment of the present invention, if the UE receives the PDSCH that is sent by the base station through the downlink subframe of the PCell, the UE may perform the AN feedback of the PDSCH that is sent according to the original timing relationship of the PCell.
- the uplink AN of the SCell is fed back in the uplink subframe of the PCell.
- the base station may be specific to The carrier is subjected to the sub-frame shift processing, and the sub-frame shift of the specific carrier is performed, so that the number of feedback ANs in the uplink subframe of the PCell tends to be equalized, thereby effectively ensuring the detection performance of the AN, and shifting.
- the subframe configuration of the carrier after the bit needs to be known by the base station and the UE. Therefore, before the step 101, the communication method of the embodiment of the present invention may further include:
- the base station performs a subframe-level shift processing on the radio frame of the PCell with respect to the radio frame of the SCell; or, it is learned that the base station performs a subframe-level shift on the radio frame of the SCell relative to the radio frame of the PCell. deal with.
- the UE may perform sub-frame level shift processing on the PCell or the SCell by the base station by using a notification or a preset of the base station.
- the communication method for the CA system provided in this embodiment can effectively ensure the normal feedback of the uplink AN corresponding to the PDSCH of the SCell in the CA system with different uplink and downlink configurations of each carrier, thereby effectively ensuring normal between the base station and the UE. Communicate.
- the embodiment of the present invention further provides a communication method for a CA system.
- the base station serving the UE includes the following steps:
- Step 201 The PDSCH information is sent to the UE by using the subframe n of the SCell.
- the method further includes: a physical downlink control channel PDCCH information that is sent by using the subframe n of the PCell, where the PDCCH information is used to schedule the subframe n of the SCell.
- PDCCH information delivered.
- the embodiment includes:
- Step 202 Receive an AN feedback of the PDSCH information that is sent by the UE on the subframe m or the subframe p of the PCell, where the m is an AN timing relationship corresponding to the subframe n of the PCell. And transmitting, in the PCell, a subframe index of a subframe of an AN of a PDSCH of the subframe n of the PCell, where the p is an AN timing relationship corresponding to the subframe n of the SCell, and the feedback is performed by the SCell according to the SCell The subframe index of the subframe of the AN of the PDSCH of subframe n of the SCell.
- the timing relationship of the PDSCH corresponding to the SCell is known to the base station and the UE. That is, the base station knows that the UE performs the AN feedback of the PDSCH information that is sent by the UE in the PCell. Therefore, in this step, the base station will receive the AN feedback of the PDSCH information sent by the UE on the PCell by using the receiving mode corresponding to the UE.
- the UE can perform the feedback of the AN of the PDSCH of the subframe n of the SCell through the subframe m of the PCell, and the base station can receive the delivered by the subframe m of the PCell.
- the PDSCH information is sent.
- the UE can also perform the feedback of the AN of the PDSCH of the subframe n of the SCell through the subframe p of the PCell, and the base station can receive the downlink by using the subframe p of the PCell.
- the PDSCH information is sent. Therefore, the normal feedback of the AN feedback of the PDSCH of the subframe n of the Scell can be effectively ensured, thereby ensuring effective communication between the base station and the UE.
- the base station when the UE performs the AN feedback of the PDSCH information on the subframe in which the AN feedback delay of the PDSCH information is the smallest in the subframe m and the subframe p of the PCell, In this step, the base station sends the subframe that is received by the user equipment in the sub-frame m of the PCell and the sub-frame p, and the AN feedback delay of the PDSCH information that is sent is the smallest. The AN feedback of the delivered PDSCH information.
- the embodiment includes:
- Step 203 If the subframe p on the PCell is an uplink subframe, receive AN feedback of the downlink PDSCH information sent by the user equipment on the subframe p of the PCell; if the PCell is on the PCell The subframe p is a downlink subframe, and receives the notification that the user equipment sends on the PCell, the preset or the uplink subframe specified by the notification of the base station according to a preset or a notification of the base station. AN feedback of the transmitted PDSCH information.
- the base station may specify, in the subframe of the PCell, the UE to perform AN feedback of the PDSCH information. Therefore, the communication method of this embodiment further includes:
- a notification of a subframe indicating that the UE performs AN feedback of the PDSCH information is sent to the UE.
- the uplink AN of the SCell is fed back in the uplink subframe of the PCell.
- the base station may be specific to The carrier is subjected to the sub-frame-level shift processing, and the sub-frame shift of the specific carrier is performed, so that the number of feedback ANs in the uplink subframe of the PCell tends to be equalized, thereby effectively ensuring the detection performance of the AN, and therefore,
- the communication method of the embodiment, before the step 201 may further include: performing a sub-frame level shift processing on the radio frame of the PCell with respect to the radio frame of the SCell, or Sub-frame level shift processing is performed on the radio frame of the SCell with respect to the radio frame of the PCell.
- the communication method further includes:
- the notification of the shift processing is sent to the UE.
- the communication method for the CA system provided in this embodiment can effectively ensure the normal feedback of the uplink AN corresponding to the PDSCH of the SCell in the CA system with different uplink and downlink configurations of each carrier, thereby effectively ensuring normal between the base station and the UE. Communicate.
- the CA system is configured with PCell and P SCell, PCell is configured for uplink and downlink, and SCell is for uplink and downlink configuration 2.
- the subframes marked with numbers are uplink subframes, and the numbers are indicated in the current
- the uplink subframe needs to be fed back to the uplink AN of the PDSCH to which the downlink subframe is to be sent.
- the subframe 8 of the PCell is a downlink subframe. This embodiment includes the following steps:
- Step 301 The base station sends PDSCH information to the UE through the subframe 8 of the SCell.
- Step 302 The UE receives the PDSCH information that is sent by the base station through the subframe 8 of the SCell.
- Step 303 The UE performs AN feedback of the delivered PDSCH information on the subframe 3 of the PCell.
- the UE performs AN feedback of the PDSCH information sent on the PCell according to the timing relationship corresponding to the subframe 8 on the PCell.
- the subframe in which the AN feedback of the PDSCH of the subframe 8 of the PCell is performed is the subframe 3 of the PCell according to the timing relationship corresponding to the subframe 8 on the PCell. Therefore, in this step, the UE is in the subframe of the PCell. The AN feedback corresponding to the PDSCH delivered by the subframe 8 of the SCell is performed.
- Step 304 The base station receives AN feedback of the delivered PDSCH information sent by the UE on the subframe 3 of the PCell.
- the subframe in which the SCell performs the AN feedback of the PDSCH of the subframe 8 of the Scell is the subframe 2
- the subframe 2 The eNB is also an uplink subframe. Therefore, in step 303, the UE performs AN feedback of the PDSCH information that is sent on the subframe 2 of the PCell according to the timing relationship corresponding to the subframe 8 on the SCell. For example, in step 304, the base station receives the AN feedback of the PDSCH information sent by the UE on the subframe 2 of the PCell.
- the UE may further compare the feedback delays of the subframes 2 and 3 that can be used for the AN feedback of the PDSCH that is sent by the UE in the above two manners, and the subframes.
- the feedback delay of the PDSCH is small. Therefore, in step 303, the UE uses the second mode corresponding to the UE, that is, the AN feedback of the PDSCH information sent in the subframe 2 of the PCell according to the timing relationship of the SCell itself. .
- the base station receives AN feedback of the PDSCH information sent by the UE on the subframe 2 of the PCell.
- subframe 4 of PCell is an uplink subframe. This embodiment includes the following steps:
- Step 401 The base station sends PDSCH information to the UE through the subframe 4 of the SCell.
- Step 402 The UE receives the PDSCH information that is sent by the base station through the subframe 4 of the SCell.
- Step 403 The UE performs AN feedback of the delivered PDSCH information on the subframe 2 of the PCell.
- Step 404 The base station receives AN feedback of the downlink PDSCH information sent by the UE on the subframe 2 of the PCell.
- the PDSCH information of the SCell is transmitted according to the timing relationship of the SCell itself.
- the subframe fed back by the AN is the subframe 2, and on the PCell, the subframe 2 is also the uplink subframe. Therefore, in this embodiment, the UE follows the timing relationship corresponding to the subframe 4 on the SCell, and the subframe 2 on the PCell.
- the AN feedback of the PDSCH information that is sent is performed, and the base station receives the AN feedback of the PDSCH information that is sent on the subframe 2 of the PCell.
- subframe 3 of PCell is an uplink subframe. This embodiment includes the following steps:
- Step 501 The base station sends the PDSCH information to the UE by using the subframe 3 of the SCell.
- Step 502 The UE receives the PDSCH information that is sent by the base station through the subframe 3 of the SCell.
- step 503 the UE performs the foregoing on the PCell and the uplink subframe 2 with the smallest subframe 3 delay of the SCell according to a preset. AN feedback of the transmitted PDSCH information.
- Step 504 The base station receives AN feedback of the delivered PDSCH information sent by the UE on the subframe 2 of the PCell.
- the subframe 3 of the SCell performs the AN feedback of the PDSCH information according to the timing relationship of the SCell itself, the subframe is the subframe 7, and on the PCell, the subframe 7 is the downlink subframe, and the AN feedback cannot be performed. Therefore, in this embodiment, the UE selects the uplink subframe 2 of the PCell and the subframe 3 with the smallest delay of the SCell according to the preset, and performs AN feedback of the PDSCH information that is sent. Correspondingly, the base station receives the AN feedback of the delivered PDSCH information on the subframe 2 of the PCell.
- the number of Hybrid Automatic Repeat Request (HARQ) processes of the SCell is determined. Will change.
- the number of downlink HARQ processes of the PCell is 7 and the number of downlink HARQ processes of the SCell is 10; After the technical solution is provided, the number of downlink HARQ processes of the PCell is unchanged, and the number of downlink HARQ processes of the SCell is reduced from 10 to 9.
- the embodiment of the present invention further provides a communication method for a CA system, based on a base station, where the CA system is configured with a PCell and an SCell, and the PCell and the SCell are different uplink and downlink configurations. Examples include the following steps:
- Step 601 Generate scheduling information UL_grant for scheduling the physical uplink shared channel PUSCH of the uplink subframe n of the SCell.
- n is the subframe index.
- the embodiment includes: Step 602, the scheduling information UL grant of the PUSCH is sent to the UE by using a subframe q or a subframe y of the PCell, where the q The sub-frame of the subframe of the scheduling information UL_grant of the PUSCH of the subframe n of the PCell is transmitted according to the UL_grant timing relationship corresponding to the subframe n of the PCell, and the y is the UL_grant timing relationship corresponding to the subframe n of the SCell. And transmitting a subframe index of a subframe of the scheduling information UL_grant of the PUSCH of the subframe n of the SCell.
- the base station preferably transmits the scheduling information UL_grant of the PUSCH to the UE through the subframe q of the PCell.
- the subframe n of the PCell is the uplink subframe
- the scheduling information UL_grant of the PUSCH of the subframe n of the PCell is transmitted according to the UL_grant timing relationship corresponding to the subframe n of the PCell, that is, the subframe q of the PCell is The downlink subframe, therefore, the base station can transmit the scheduling information UL_grant of the PUSCH to the UE through the subframe q of the PCell, that is, the normal communication between the base station and the UE can be effectively ensured.
- the base station can also pass the subframe y of the PCell.
- the UE sends the scheduling information UL_grant of the PUSCH. Therefore, in this step, the base station may send the scheduling information UL grant of the PUSCH to the UE by using the subframe y of the PCell.
- the base station may also select one subframe to send the scheduling information UL_grant of the PUSCH to the UE in the subframe q and the subframe y of the PCell. For example, the base station selects, in the subframe q and the subframe y of the PCell, the UE to receive the scheduling information UL_grant of the PUSCH to the subframe with the smallest delay of transmitting the PUSCH, and sends the scheduling of the PUSCH to the UE.
- Information UL_grant is information UL_grant.
- the embodiment includes:
- Step 603 If the subframe y on the PCell is a downlink subframe, send the scheduling information UL_grant of the PUSCH to the UE through the subframe y of the PCell, if the subframe y on the PCell is an uplink subframe, according to a preset or local The acquired message sends the scheduling information UL_grant of the PUSCH to the UE by using a downlink subframe specified by the pre-set or locally obtained message on the PCell.
- the information obtained locally by the base station may be information such as the service status and the load status of the current system acquired by the base station. According to the locally obtained information, the base station determines the subframe in which the scheduling information UL_grant of the PUSCH is transmitted on the PCell.
- the base station needs to send a notification to the UE, so that the UE knows that the base station sends a subframe of the scheduling information UL_grant of the PUSCH on the PCell.
- the communication method for the CA system provided in this embodiment can effectively ensure the normal scheduling of the PUSCH of the SCell in the CA system in which the carriers have different uplink and downlink configurations, and therefore, the normal communication between the base station and the UE is effectively ensured.
- the embodiment of the present invention further provides a communication method for a CA system, based on the UE served by the base station, as shown in FIG. 5:
- the embodiment includes:
- Step 701 Receive scheduling information UL_grant of the PUSCH information of the subframe n of the SCell sent by the base station in the subframe q or the subframe y of the PCell, where the q is a UL_grant timing relationship corresponding to the subframe n of the PCell, a subframe index of a subframe of the scheduling information UL_grant of the PUSCH of the subframe n of the PCell, where y is a sub-frame of the scheduling information UL_grant of the PUSCH of the subframe n of the SCell according to the UL_grant timing relationship corresponding to the subframe n of the SCell The subframe index of the frame.
- the timing relationship of the PUSCH corresponding to the SCell is to be known by the base station and the UE. That is, the UE knows that the base station transmits the subframe of the PUSCH scheduling information UL_grant on the PCell. Therefore, in this step, The UE receives the scheduling information UL_grant for scheduling the PUSCH of the uplink subframe n of the SCell by using the receiving mode corresponding to the base station side.
- the base station can transmit the scheduling information UL_grant for scheduling the PUSCH of the uplink subframe n of the SCell through the subframe q of the PCell, and the UE can receive the subframe q through the PCell.
- the scheduling information UL_grant is described.
- the base station can also send scheduling information UL_grant for scheduling the PUSCH of the uplink subframe n of the SCell through the subframe y of the PCell, and the UE can receive the subframe y through the PCell.
- the scheduling information UL_grant is obtained, so that the normal feedback of the AN feedback of the PDSCH of the subframe n of the Scell can be effectively ensured, thereby ensuring effective communication between the base station and the UE.
- the UE if the base station is in the subframe q and the subframe y, in the subframe q and the subframe y of the PCell, the UE is selected to receive the scheduling information UL_grant of the PUSCH to Sending the scheduling information UL_grant of the PUSCH to the UE by using the subframe with the smallest delay of the PUSCH, in this step, the UE will receive the selected subframe q and the subframe y of the PCell in the PCell.
- the UE receives the scheduling information UL_grant of the PUSCH to the scheduling information UL_grant of the PUSCH information of the subframe n of the SCell transmitted in the subframe in which the delay of transmitting the PUSCH is the smallest.
- the embodiment includes: Step 702: If the subframe y on the PCell is a downlink subframe, receive the SCell sent by the base station on the subframe y of the PCell.
- the scheduling information UL_grant of the PUSCH information of the subframe n if the subframe y on the PCell is an uplink subframe, according to a preset or notification from the base station, receiving the base station on the PCell, the preset or the base station.
- the scheduling information UL_grant of the PUSCH of the subframe n of the SCell transmitted in the specified downlink subframe is notified.
- Step 703 Send the PUSCH in the subframe n of the SCell according to the PUSCH scheduling information UL_grant.
- the communication method for the CA system provided in this embodiment can effectively ensure the normal scheduling of the PUSCH of the SCell in the CA system with different uplink and downlink configurations of each carrier, thereby effectively ensuring normal communication between the base station and the UE. .
- the CA system is configured with PCell and SCell, PCell is for uplink and downlink configuration 1, SCell is for uplink and downlink configuration 2, and the subframes marked with numbers are all uplink subframes, and the number indicates that the current uplink is scheduled.
- the subframe 2 of the PCell is an uplink subframe
- the SCell is a sub-frame
- Frame 2 is an uplink subframe.
- Step 801 The base station generates scheduling information UL_grant for scheduling the physical uplink shared channel PUSCH of the uplink subframe 2 of the SCell.
- Step 802 The base station sends the scheduling information UL_grant of the PUSCH of the uplink subframe 2 of the SCell to the UE through the subframe 6 of the PCell.
- Step 803 The UE receives scheduling information UL_grant that is sent by the base station to the PUSCH of the uplink subframe 2 of the SCell by using the subframe 6 of the PCell.
- Step 804 The UE sends the PUSCH on the subframe 2 of the SCell according to the scheduling information UL_grant of the PUSCH.
- the subframe 2 of the PCell is an uplink subframe.
- the UL_grant corresponding to the subframe 2 on the PCell is transmitted on the subframe 6 of the PCell. Therefore, in this embodiment, the base station transmits the scheduling information UL_grant of the PUSCH of the uplink subframe 2 of the SCell to the UE through the subframe 6 of the PCell.
- the communication method for the CA system shown in FIGS. 4 and 5 will be further described in detail below by way of a specific embodiment.
- the CA system is configured with a PCell and an SCell
- the PCell is an uplink and downlink configuration 5
- the SCell is an uplink and downlink configuration 2.
- the subframes marked with numbers are uplink subframes, and the numbers indicate that the current uplink is scheduled.
- the subframe 7 of the PCell is a downlink subframe
- the SCell is a sub-frame.
- Frame 7 is an uplink subframe.
- Step 901 The base station generates scheduling information for scheduling the physical uplink shared channel PUSCH of the uplink subframe 7 of the SCell.
- Step 902 The base station sends the scheduling information UL_grant of the PUSCH of the uplink subframe 7 of the SCell to the UE through the subframe 3 of the PCell.
- Step 903 The UE receives the scheduling information UL_grant that is sent by the base station to the PUSCH of the uplink subframe 7 of the SCell by using the subframe 3 of the PCell.
- Step 904 The UE sends the PUSCH on the subframe 7 of the SCell according to the scheduling information UL_grant of the PUSCH.
- the subframe 7 of the PCell is a downlink subframe.
- the UL_grant corresponding to the subframe 7 on the SCell is transmitted on the subframe 3 of the SCell according to the timing relationship corresponding to the subframe 7 on the SCell. Therefore, the base station transmits the scheduling information UL_grant of the PUSCH of the uplink subframe 7 of the SCell to the UE through the subframe 3 of the PCell.
- an embodiment of the present invention further provides a UE for a CA system, where the CA system is configured with a SCell and a PCell, as shown in FIG.
- the receiving unit 10 is configured to receive PDSCH information that is sent by the base station through the subframe n of the SCell, and the feedback unit 1 1 is configured to:
- subframe n of the PCell is a downlink subframe:
- ACK/NACK feedback of the downlink PDSCH information on the subframe m or the subframe p of the primary cell PCell where the m is an ACK/NACK corresponding to the subframe n of the primary cell PCell a timing index, a subframe index of a subframe of an ACK/NACK of a PDSCH of a subframe n of the primary cell PCell, and the p is a sub-card according to the SCellSCell An ACK/NACK timing relationship corresponding to the frame n, and a subframe index of the subframe of the ACK/NACK of the PDSCH of the subframe n of the SCellSCell being fed back to the SCellSCell;
- subframe n of the PCell is an uplink subframe:
- the subframe p on the primary cell PCell is an uplink subframe, perform ACK/NACK feedback of the delivered PDSCH information on the subframe p of the primary cell PCell; if the primary cell PCell is a sub-frame The frame p is a downlink subframe, and the PDSCH information that is sent is performed on the uplink subframe specified by the preset or the notification of the base station on the primary cell PCell according to a preset or a notification from the base station.
- ACK/NACK feedback for example, performing AN feedback of the PDSCH information that is sent on an uplink subframe with the smallest AN feedback delay of the PDSCH information that is sent on the PCell;
- n, m, and p are subframe indexes.
- the UE for the CA system provided in this embodiment can effectively ensure the normal feedback of the uplink AN corresponding to the SCell in the CA system with different uplink and downlink configurations, so that the normal communication between the base station and the UE is effectively ensured.
- the feedback unit 1 1 can also be specifically used to:
- the PDSCH that is sent is performed on the subframe in which the AN feedback delay of the PDSCH information that is sent is the smallest in the subframe m and the subframe p of the PCell. AN feedback of information.
- the uplink AN of the SCell is fed back in the uplink subframe of the PCell.
- the base station may perform the subframe level on the specific carrier.
- the shift processing is performed by shifting the sub-frame level of a specific carrier, so that the number of feedback ANs in the uplink subframe of the PCell tends to be equalized, thereby effectively ensuring the detection performance of the AN, and the carrier of the shifted carrier is performed.
- the frame configuration needs to be known by the base station and the UE. Therefore, the UE of the embodiment of the present invention, as shown in FIG. 9, may further include:
- the learning unit 12 is configured to learn that the base station performs a subframe-level shift processing on the radio frame of the PCell with respect to the radio frame of the SCell; or, the base station learns that the radio frame of the SCell is compared to the radio frame of the PCell. Sub-level shift processing.
- the learning unit 12 can learn that the base station performs the sub-frame level shift processing on the PCell or the SCell by the notification or preset of the base station.
- the receiving unit 10 is further configured to receive, by the base station, the physical downlink control channel PDCCH information that is sent by the base station through the subframe n of the PCell, where the PDCCH information is used to schedule the base station to pass the SCell sub- PDSCH information sent by frame n.
- an embodiment of the present invention further provides a base station for a CA system, where the CA system is configured with a SCell and a PCell, as shown in FIG.
- the sending unit 20 is configured to send PDSCH information to the UE through the subframe n of the SCell, and the receiving unit 21 is configured to:
- subframe n of the PCell is a downlink subframe:
- subframe n of the PCell is an uplink subframe:
- the ACK/NACK feedback of the PDSCH information sent by the UE on the subframe p of the PCell is received, and if the subframe p on the PCell is a downlink subframe, the UE is received.
- ACK/NACK feedback of the downlink PDSCH information sent on the PCell, the pre-set or the uplink subframe specified by the notification of the base station according to a preset or a notification from the base station for example, receiving the The AN feedback of the PDSCH information sent by the UE in the uplink subframe with the smallest AN feedback delay of the PDSCH information sent by the UE on the PCell according to the preset or the notification of the base station;
- n, m, and p are subframe indexes.
- the UE for the CA system provided in this embodiment can effectively ensure the normal feedback of the uplink AN corresponding to the SCell in the CA system with different uplink and downlink configurations, so that the normal communication between the base station and the UE is effectively ensured.
- the receiving unit 21 is further configured to:
- the receiving UE transmits the next subframe in the subframe m of the PCell and the sub-frame p in which the AN feedback delay of the PDSCH information that is sent is the smallest. AN feedback of the transmitted PDSCH information.
- the base station since the uplink AN of the SCell is fed back in the uplink subframe of the PCell, in order to avoid the imbalance of the number of ANs transmitted by each uplink subframe of the PCell, and ensuring the detection performance of the AN, the base station may The specific carrier performs the sub-frame-level shift processing, and the number of the feedback ANs in the uplink subframe of the PCell tends to be equalized by performing the sub-frame shift on the specific carrier. Therefore, the base station provided by the embodiment of the present invention, As shown in FIG. 11, the method may further include:
- the shifting unit 22 is configured to perform a sub-frame shift processing on the radio frame of the PCell with respect to the radio frame of the SCell, or perform a sub-frame shift processing on the radio frame of the SCell with respect to the radio frame of the PCell.
- the sending unit 20 may be further configured to send the notification of the shift processing to the UE.
- the sending unit 20 is further configured to use the physical downlink control channel PDCCH information that is sent by the subframe n of the PCell, where the PDCCH information is used to schedule PD S CH information that is sent by the subframe n of the SCell.
- the sending unit 20 does not schedule the PDSCH on the subframe n of the SCell if the subframe n of the PCell is an uplink subframe.
- an embodiment of the present invention further provides a base station for a CA system, where the CA system is configured with a SCell and a PCell.
- the method includes:
- the generating unit 30 is configured to generate scheduling information UL_grant for scheduling the PUSCH of the uplink subframe n of the SCell;
- Scheduling unit 3 for:
- subframe n of the PCell is an uplink subframe:
- the scheduling information UL_grant of the PUSCH is sent to the UE by using the subframe q or the subframe y of the PCell, where the q is the scheduling information of the PUSCH corresponding to the subframe n of the PCell according to the UL_grant timing relationship corresponding to the subframe n of the PCell.
- subframe n of the PCell is a downlink subframe:
- the scheduling information UL_grant of the PUSCH is sent to the UE through the subframe q of the PCell. If the subframe y on the PCell is an uplink subframe, according to a preset or locally acquired message. And transmitting the scheduling information UL_grant of the PUSCH to the UE by using a downlink subframe specified by the pre-set or locally acquired message on the PCell;
- n, q, y are subframe indexes.
- the base station for the CA system provided in this embodiment can effectively ensure the normal scheduling of the PUSCH of the SCell in the CA system with different uplink and downlink configurations, and effectively ensure normal communication between the base station and the UE.
- the scheduling unit 31 is further configured to: select, in the subframe q and the subframe y of the PCell, the UE to receive the PUSCH.
- the scheduling information UL_grant sends the scheduling information UL_grant of the PUSCH to the UE to the subframe in which the delay of transmitting the PUSCH is the smallest.
- an embodiment of the present invention further provides a UE for a CA system, where the CA system is configured with a SCell and a PCell, as shown in FIG.
- the receiving unit 40 is configured to:
- subframe n of the PCell is an uplink subframe:
- the scheduling information UL_grant of the PUSCH information of the subframe n of the SCell which is sent by the base station q or the subframe y of the PCell, where the q is a UL_grant timing relationship corresponding to the subframe n of the PCell, and the PCell is sent.
- a subframe index of a subframe of the scheduling information UL_grant of the PUSCH of the subframe n where y is a subframe of a subframe of the scheduling information UL_grant of the PUSCH of the subframe n of the SCell according to the UL_grant timing relationship corresponding to the subframe n of the SCell Frame index
- subframe n of the PCell is a downlink subframe:
- the scheduling information UL_grant of the PUSCH information of the subframe n of the SCell transmitted by the base station on the subframe y of the PCell is received, if the subframe y on the PCell is uplink a subframe, according to a preset or a notification by the base station, receiving scheduling information of the PUSCH of the subframe n of the SCell sent by the base station on the PCell, the preset or the downlink subframe specified by the notification of the base station UL_grant;
- n, q, y are subframe indexes
- the sending unit 41 is configured to send the PUSCH on the subframe n of the SCell according to the scheduling information UL_grant of the PUSCH.
- the UE for the CA system provided in this embodiment can effectively ensure the normal scheduling of the PUSCH of the SCell in the CA system with different uplink and downlink configurations, and effectively ensure normal communication between the base station and the UE.
- the receiving unit 40 is further specifically configured to: Receiving, by the base station, a subframe of the SCell transmitted by the UE in the subframe q and the subframe y of the PCell, and the UE receives the scheduling information UL_grant of the PUSCH to the subframe in which the delay of transmitting the PUSCH is the smallest. Scheduling information UL_grant of PUSCH information of n.
- An embodiment of the present invention provides a communication method for a CA system, based on a UE, as shown in FIG. 14, this embodiment includes the following steps:
- the first reference TDD uplink and downlink configuration is a TDD uplink and downlink configuration of the primary cell, or the first reference TDD uplink and downlink configuration is a TDD uplink and downlink configuration 5.
- the primary cell is the TDD uplink and downlink configuration 1
- the secondary cell is the TDD uplink and downlink configuration 2
- the two cells are aggregated to one UE for data transmission
- the PDCCH corresponding to the PDSCH on the secondary cell is transmitted in the primary cell.
- the scenario of cross-carrier scheduling and assumes that the uplink ACK/NACK must be fed back on the primary cell.
- the subframe n of the secondary cell is 0, 1, 4, 5, 6, and 9 downlink subframes
- the subframe n of the corresponding primary cell is also a downlink subframe, and the subframe n of the primary cell may be used.
- the PDSCH of the subframe n of the secondary cell is scheduled to be transmitted across the carrier, and the feedback timing of the uplink ACK/NACK corresponding to the PDSCH may be set according to the timing relationship of the primary cell, that is, the uplink and downlink configuration of the first reference TDD is the TDD of the primary cell. Line configuration. Specifically, the ACK/NACK corresponding to the PDSCH on the subframes 5 and 6 of the secondary cell is reported on the subframe 2 of the primary cell, and the ACK/NACK corresponding to the PDSCH on the subframe 9 of the secondary cell is fed back to the subframe of the primary cell. 3, and so on.
- the configuration of the first reference TDD uplink and downlink configuration is TDD uplink and downlink configuration 5, that is, configuration of 9 downlink subframes and 1 uplink subframe.
- the subframe n of the secondary cell is 3, 8 of the downlink subframes
- the subframe n of the corresponding primary cell is an uplink subframe
- the base station does not schedule the PDSCH of the UE on the subframes, so the UE can assume The base station does not schedule the PDSCH of the downlink subframes of subframes 3 and 8.
- the primary cell and the secondary cell are different TDD uplink and downlink configurations, and the following situation occurs, that is, for the time of the first subframe, the primary cell is an uplink subframe and the secondary cell is a downlink subframe, and for the second At the time of the subframe, the primary cell is the downlink subframe and the secondary cell is the uplink subframe (and vice versa).
- the ACK/NACK of the uplink feedback of the secondary cell cannot be fed back according to the timing of the primary cell or the secondary cell.
- the secondary cell may feed back according to the uplink ACK/NACK timing of the TDD uplink and downlink configuration 5.
- the primary cell is configuration 2, and the secondary cell is configuration 3; or the primary cell is configuration 2, and the secondary cell is configuration 4; or the primary cell is configuration 1, and the secondary cell is configuration 3.
- ACK/NACK resource allocation of ACK/NACK is relatively simple, because if the secondary cell feeds back ACK/NACK on the primary cell according to its own timing relationship, there may be an ACK/NACK resource conflict, for example, if the secondary cell is a child
- the ACK/NACK corresponding to the frame 9 is in its own timing relationship, that is, when it is fed back to the subframe 7 of the primary cell, but the subframe 7 of the primary cell does not reserve an implicit ACK/NACK resource for the subframe 9, so
- the base station is required to perform collision resolution; if the ACK/NACK corresponding to the subframe 9 of the secondary cell is fed back to the subframe 3 of the primary cell according to the timing relationship of the primary cell, because the subframe 3 of the primary cell is a subframe.
- the implicit ACK/NACK resource is reserved, so no scheduling restriction is imposed on the base station to solve the problem of ACK/NACK resource conflict. Moreover, it is advantageous to shorten the feedback delay of the ACK/NACK.
- the ACK/NACK feedback corresponding to the subframe 9 has a delay of 4 in the subframe 3, and the delay of the feedback on the subframe 7 is 8. 3)
- the strategy of the base station not scheduling is adopted, which can be implemented simply, and the secondary cell can feed back the uplink ACK/NACK according to the timing relationship of the complete set of primary cells.
- the first reference TDD uplink and downlink configuration is that the common uplink subframe set or the subset of the common uplink subframe set that is the same as the time of the primary cell and the secondary cell is an uplink subframe, and other sub-frames
- the frame is the TDD uplink and downlink configuration of the downlink subframe.
- the primary cell is the TDD uplink and downlink configuration 1
- the secondary cell is the TDD uplink and downlink configuration 3.
- the two cells are aggregated to one UE for data transmission, and the uplink ACK/NACK must be fed back to the primary cell.
- the subframe 4 is downlink for the primary cell and the secondary cell is the uplink
- the subframes 7 and 8 are uplink for the primary cell and downlink for the secondary cell, so the uplink ACK/NACK of the primary cell can be set according to its own timing.
- the uplink ACK/NACK timing of the secondary cell may not be completely set according to the secondary cell's own timing, nor may it be completely set according to the timing of the primary cell.
- the ACK/NACK timing of the secondary cell may be set according to the first reference timing, where the first reference timing may be that the common uplink subframe with the same time of the primary cell and the secondary cell is the uplink subframe.
- the other subframe is the timing relationship of the uplink ACK/NACK of the TDD uplink and downlink configuration of the downlink subframe.
- the second is configuration 4, that is, the common uplink subframe at the same time of the primary cell and the secondary cell is The uplink subframes 2 and 3, and the other subframes are all downlinks; or the first reference timing may be that the subset of the common uplink subframe set with the same time of the primary cell and the secondary cell is an uplink subframe
- the other eight subframes are the uplink ACK/NACK timing relationship of the TDD uplink and downlink configuration of the downlink subframe, for example, the reference configuration 2 in FIG. 2 is the configuration 5, that is, the common uplink subframe with the same time of the primary cell and the secondary cell.
- the set includes uplink subframes 2 and 3, one of which may be uplink subframe 2, and the other 9 subframes are downlink.
- the scheme may enable the secondary cell to feed back uplink ACK/NACK according to a complete set of reference configurations.
- the method further includes: determining, by using the at least two first reference TDD uplink and downlink configurations, the subframe n of the secondary cell Corresponding first reference TDD uplink and downlink configuration; the k is the primary cell feedback determined according to the determined ACK/NACK timing relationship of the first reference TDD uplink and downlink configuration corresponding to the subframe n of the secondary cell The subframe index of the subframe of the ACK/NACK corresponding to the subframe n of the secondary cell.
- the primary cell is the TDD uplink and downlink configuration 1
- the secondary cell is the TDD uplink and downlink configuration 2.
- the two cells are aggregated to one UE for data transmission, and the uplink ACK/NACK must be fed back to the primary cell.
- the downlink subframes in which the subframe n of the secondary cell is 4, 9 may be divided into the first group, and the remaining downlink subframes are divided into the second group.
- the uplink ACK/NACK of the first group of subframes may be in accordance with the A first reference to the ACK/NACK timing relationship of the TDD uplink and downlink configuration, for example, the first type of the first reference TDD uplink and downlink configuration is configured as a primary cell or other configuration; the uplink ACK/NACK of the second group of subframes may be The ACK/NACK timing relationship of the second reference TDD uplink and downlink configuration is used for feedback.
- the second first reference TDD uplink and downlink configuration is a configuration of the secondary cell subset or other configuration. The scheme shortens the ACK/NACK feedback delay corresponding to certain downlink subframes on the secondary cell.
- the method further includes: receiving, by the base station, a PDCCH in a subframe n of the primary cell, where the PDCCH schedules a subframe n of the secondary cell On the PDSCH.
- the embodiment of the invention provides a user equipment for performing the above method.
- the user equipment includes:
- the receiving unit 1801 is configured to receive physical downlink shared channel PDSCH information that is sent by the base station by using the subframe n of the secondary cell.
- the processing unit 1802 is configured to: according to the ACK/NACK timing relationship of the first reference TDD uplink and downlink configuration, the subframe index k of the subframe corresponding to the ACK/NACK corresponding to the subframe n of the secondary cell in the primary cell;
- the sending unit 1803 is configured to perform ACK/NACK feedback corresponding to the PDSCH information received by the receiving unit 1801 on the subframe k of the primary cell determined by the processing unit 1802.
- the first reference TDD uplink and downlink configuration is a TDD uplink and downlink configuration of the primary cell, or the first reference TDD uplink and downlink configuration is a TDD uplink and downlink configuration 5.
- the first reference TDD uplink and downlink configuration is that the common uplink subframe set or the subset of the common uplink subframe set that is the same as the time of the primary cell and the secondary cell is an uplink subframe, and other sub-frames
- the frame is the TDD uplink and downlink configuration of the downlink subframe.
- the processing unit is further configured to determine, according to the at least two first reference TDD uplink and downlink configurations, the auxiliary a first reference TDD uplink and downlink configuration corresponding to the subframe n of the cell; specifically configured to determine, according to the determined ACK/NACK timing relationship of the first reference TDD uplink and downlink configuration corresponding to the subframe n of the secondary cell
- the primary cell feeds back the subframe index k of the subframe of the ACK/NACK corresponding to the subframe n of the secondary cell.
- the receiving unit 1801 is further configured to receive, by the base station, a PDCCH in a subframe n of the primary cell, where the PDCCH scheduling station The PDSCH on the subframe n of the secondary cell.
- the embodiment of the present invention provides a communication method for a CA system. Based on the base station, as shown in FIG. 19, the embodiment includes the following steps:
- the ACK/NACK corresponding to the downlink PDSCH information that is sent by the user equipment is received on the subframe k of the primary cell, where the k is an ACK/NACK configured by the user equipment according to the first reference TDD uplink and downlink. And determining, by the timing relationship, a subframe index of the subframe of the ACK/NACK corresponding to the subframe n of the secondary cell in the primary cell.
- the first reference TDD uplink and downlink configuration is a TDD uplink and downlink configuration of the primary cell, or the first reference TDD uplink and downlink configuration is a TDD uplink and downlink configuration 5.
- the first reference TDD uplink and downlink configuration is that the common uplink subframe set or the subset of the common uplink subframe set that is the same as the time of the primary cell and the secondary cell is an uplink subframe, and other sub-frames
- the frame is the TDD uplink and downlink configuration of the downlink subframe.
- the k is determined according to the user equipment from the at least two first reference TDD uplink and downlink configurations.
- the subframe index of the subframe of the ACK/NACK corresponding to the subframe n of the secondary cell determined by the primary cell determined by the first reference TDD uplink and downlink configuration ACK/NACK timing relationship corresponding to the subframe n of the secondary cell.
- the method further includes: sending a PDCCH to the user equipment in a subframe n of the primary cell, where the PDCCH schedules the auxiliary PDSCH on subframe n of the cell.
- the PDSCH on the subframe n of the secondary cell is not scheduled.
- the embodiment of the invention provides a base station for performing the above method.
- the base station includes: a sending unit 2001, configured to transmit physical downlink shared channel PDSCH information to the user equipment by using a subframe n of the secondary cell;
- the receiving unit 2002 is configured to receive, according to the subframe k of the primary cell, an ACK/NACK corresponding to the PDSCH information received by the receiving unit 2001 that is fed back by the user equipment, where k is the user equipment according to the first reference TDD.
- the subframe index of the subframe of the ACK/NACK corresponding to the subframe n of the secondary cell which is determined by the ACK/NACK timing relationship of the uplink and downlink configuration.
- the first reference TDD uplink and downlink configuration is that the common uplink subframe set or the subset of the common uplink subframe set that is the same as the time of the primary cell and the secondary cell is an uplink subframe, and other sub-frames
- the frame is the TDD uplink and downlink configuration of the downlink subframe.
- the k is determined according to the user equipment from the at least two first reference TDD uplink and downlink configurations.
- the subframe index of the subframe of the ACK/NACK corresponding to the subframe n of the secondary cell determined by the primary cell determined by the first reference TDD uplink and downlink configuration ACK/NACK timing relationship corresponding to the subframe n of the secondary cell.
- the sending unit is further configured to send a PDCCH to the user equipment in a subframe n of the primary cell, where the PDCCH schedules the PDSCH on subframe n of the secondary cell.
- the sending unit does not schedule the PDSCH on the subframe n of the secondary cell.
- the embodiment of the present invention provides a communication method for a CA system. Based on the base station, as shown in FIG. 21, the embodiment includes the following steps:
- the uplink scheduling timing relationship of the first reference TDD uplink and downlink configuration includes: a timing relationship of a UL_grant corresponding to a PUSCH, or a timing relationship of a PUSCH corresponding to a PHICH, where the PHICH is a downlink ACK/NACK.
- the first reference TDD uplink and downlink configuration is a TDD uplink and downlink configuration of the primary cell, or a TDD uplink and downlink configuration of the secondary cell, or a TDD uplink and downlink configuration 0, or a TDD uplink and downlink configuration 6, or TDD uplink and downlink configuration 1.
- the j is at least one HARQ process configuration according to the first reference portion of the TDD uplink and downlink scheduling of uplink transmission of the uplink sub-secondary cell timing relationship determined frame n PUSCH scheduling information UL_ gra nt The subframe index of the subframe.
- the first reference TDD uplink and downlink configuration may be configuration 0 or 6.
- the j is determined to send the PUSCH of the uplink subframe n of the secondary cell according to part or all of the timing relationship in the uplink scheduling timing relationship of the at least one uplink index of the first reference TDD uplink and downlink configuration.
- the subframe of the subframe of the scheduling information UL_grant is I.
- the first reference TDD can be configured as 0.
- the methods of the present embodiment can also be applied to the scene of a dynamic subframe.
- a single cell ie, single carrier
- the TDD configuration is also referred to as a backward compatible TDD configuration
- the case of UL is 4:1 (lower, lower, lower, lower, lower, lower and lower).
- the technology of the dynamic subframe will be introduced in the future evolution of the TDD system. That is, some subframes in the above configuration 2 can be dynamically set to uplink or downlink.
- the dynamic subframe base station can schedule the UE to send uplink data PUSCH or uplink ACK/ NACK, otherwise the UE detects the downlink control channel such as PDCCH according to the default downlink subframe.
- the UL_grant transmitted on the dynamic subframe based on the original timing cannot be transmitted, and the original timing can be expressed as the first timing, that is, the TDD determined based on the broadcast message.
- the timing of the uplink and downlink configuration is determined.
- the uplink scheduling timing of the configuration 2 is that the UL_grant corresponding to the uplink subframes 2 and 7 are respectively transmitted on the downlink subframes 8 and 3, so that once 8 and 3 are dynamic subframes and used as uplinks Then, the UL_gra nt corresponding to the subframes 2 and 7 based on the first timing described above cannot be transmitted.
- a second timing can be introduced, that is, similar to the embodiment.
- the first reference is in a timing relationship of the TDD uplink and downlink configuration, and the second timing is used to determine an uplink scheduling and a PHICH feedback timing.
- the primary cell is a TDD UL
- the secondary cell is a TDD UL-3
- both the polymerization cell to one UE for data transmission on the assumption that the PUSCH corresponding to the secondary cell transmitted UL_ gra nt
- a downlink ACK/NACK also called a physical HARQ indicator channel (PHICH)
- PHICH physical HARQ indicator channel
- the secondary cell transmits the UL_grant according to the uplink scheduling timing of the secondary cell
- the transmission subframe of the UL_grant of the subframe 2 is scheduled to be the subframe 8
- the subframe 8 of the primary cell is the uplink subframe and the UL_grant cannot be transmitted.
- the subframe 4 of the primary cell is downlink, there is no uplink scheduling timing of the uplink subframe 4 of the secondary cell on the primary cell. Therefore, the secondary cell cannot send the UL_grant according to a complete set of uplink scheduling timing of the primary cell or the secondary cell. And the corresponding PHICH.
- the secondary cell may send the UL_grant and the corresponding PHICH according to the uplink scheduling timing of the first reference TDD uplink and downlink configuration, where the first reference TDD uplink and downlink configuration may be configuration 0 or 6.
- the primary cell is the TDD uplink and downlink configuration 0
- the secondary cell is the TDD uplink and downlink configuration 1, and the two cells are aggregated to one UE for data transmission, and it is assumed that the PU_ corresponding UL_gra nt is sent in the primary cell.
- the PHICH must be fed back on the primary cell.
- the secondary cell sends the UL_grant and the corresponding PHICH according to the uplink timing relationship of the primary cell.
- the uplink scheduling timing of the primary cell is a closed loop mode, and one of the HARQ processes is taken as an example.
- the uplink timing of the HARQ process of the PUSCH packet of the subframe 2 is ⁇ (5 or 6)->2, 6->3, 0->4, 0->7, 1->8, 5->9, 5->2 ⁇
- the first term in the braces is the timing of the UL grant to the initial transmission PUSCH, followed by Several items are the timing of the PHICH to the retransmission packet PUS CH of the above-mentioned initial transmission packet.
- the timeout is ⁇ (5 or 6)->2, 6->3, 0->7, 1->8, 5->2 ⁇ or ⁇ 5->2, 6->3, 0->7, 1->8, 5->2 ⁇ or ⁇ 6->2, 6->3, 0->7, 1->8, 5- >2 ⁇ , where the first term is the timing of the UL_grant to the initial transmission packet PUSCH, and the latter items are the timings of the PHICH to the retransmission packet PUSCH of the above-mentioned initial transmission packet.
- the foregoing three timings are part of the uplink timing of the HARQ process of the subframe 2 of the primary cell TDD configuration 0, because the subframes 4 and 9 on the secondary cell are both downlink subframes and do not need to follow the primary cell. Upstream timing is done.
- the latter two of the above three timings only use one of two sets of timings of the uplink index in UL_gra nt, that is, a part of ⁇ (5 or 6)->2 ⁇ 5->2 or 6 -> 2, since the uplink sub-frame than the primary cell downlink subframe, so the uplink index field need UL_ gra nt in UL_grant be such that the two may schedule the uplink subframe, and uplink subframe ratio of the secondary cell is 4:6, that is, the uplink index is not needed, so only one set of timings needs to be determined in the two sets of timings of the uplink index of the primary cell.
- the secondary cell can be used; or two sets of timings of the uplink index can be used, but the uplink index field needs to be added to the UL_gra nt of the secondary cell, and the field can be a new bit, a scrambling code, or reuse existing bits.
- the DAI Downlink Assignment Index
- This example can refer to the primary cell (upstream and downlink configuration 0, the uplink-downlink subframe ratio is 6:4) + secondary cell (upstream and downlink configuration 6, up and down)
- the line subframe ratio is 5:5), because each uplink subframe on the configuration 6 needs to feed back the uplink ACK/NACK corresponding to one downlink subframe, so the DAI in the UL_grant of the secondary cell can be reused as the uplink index.
- the timing relationship may depend on the second timing.
- the second timing is used to determine the uplink scheduling and PHICH feedback timing, similar to the first reference TDD uplink and downlink configuration.
- the second timing may be a timing relationship of the TDD uplink and downlink configuration 0.
- the UE may perform the subframe of the scheduling information UL_grant of the PUSCH of the uplink subframe n determined according to a part of the uplink scheduling timing relationship in the at least one HARQ process of the TDD. Further, the UE may determine, according to part or all of the timing relationships in the uplink scheduling timing relationship of the at least one uplink index of the TDD uplink and downlink configuration 0, the subframe in which the scheduling information UL_grant of the PUSCH of the uplink subframe n is transmitted.
- the timing of the primary cell is understood as the timing of the backward compatible TDD uplink and downlink configuration.
- the timing of the secondary cell is understood as the second timing determination. Timing, for example, is determined according to configuration 0 above.
- the primary cell is TDD uplink and downlink configuration 0
- the secondary cell is TDD uplink and downlink configuration 2
- the two cells are aggregated to one UE for data transmission
- the UL_grant corresponding to the PUSCH on the secondary cell is sent in the primary.
- the PHICH must be fed back on the primary cell. If the secondary cell sends the UL_grant and the corresponding PHICH according to its own uplink scheduling timing, it will be performed on subframes 3 and 8, but the subframes 3 and 8 of the primary cell are both uplink subframes and cannot transmit UL_grant and PHICH.
- the secondary cell may send the UL_grant and the corresponding PHICH according to the reference configuration, and the reference configuration may be the TDD uplink and downlink configuration 1, that is, the UL_grant and the PHICH of the uplink subframes 2 and 7 of the secondary cell may respectively transmit the subframe in the primary cell. On 6 and 1, this guarantees a short upstream HARQ round trip time.
- the primary cell and the secondary cell are different TDD uplink and downlink configurations, and the following situation occurs, that is, for the time of the first subframe, the primary cell is an uplink subframe and the secondary cell is a downlink subframe, and for the second At the time of the subframe, the primary cell is the downlink subframe and the secondary cell is the uplink subframe (and vice versa).
- the uplink scheduling of the secondary cell cannot be scheduled according to the uplink scheduling timing of the primary cell or the secondary cell, and the secondary cell at this time
- the uplink scheduling timing of the TDD uplink and downlink configuration 1 can be followed.
- the primary cell is configuration 2, and the secondary cell is configuration 3; or the primary cell is configuration 2, and the secondary cell is configuration 4; or the primary cell is configuration 1, and the secondary cell is configuration 3.
- the secondary cell may perform uplink scheduling according to the uplink scheduling timing of the TDD uplink and downlink configuration 1.
- the uplink HARQ round-trip delay of the TDD uplink and downlink configuration 1-5 is 10 subframes, that is, the first transmission time from the PUSCH initial transmission packet of one subframe to the retransmission packet corresponding to the initial transmission packet. The delay is 10 subframes.
- the uplink HARQ round-trip delay is greater than 10 subframes.
- the transmission timing of some PUSCH retransmission packets on the secondary cell is The secondary cell is not an uplink subframe. In this case, the secondary cell can perform uplink scheduling according to the uplink scheduling timing of the TDD uplink and downlink configuration 1.
- the TDD uplink and downlink configuration 1 is used as the first reference TDD uplink and downlink configuration.
- the method further includes determining, according to the at least two first reference TDD uplink and downlink configurations, the subframe n of the secondary cell Corresponding first reference TDD uplink and downlink configuration; the j is a child that sends the secondary cell determined according to the determined uplink scheduling timing relationship of the first reference TDD uplink and downlink configuration corresponding to the subframe n of the secondary cell The subframe index of the subframe of the scheduling information UL_grant of the PUSCH of the frame n.
- the primary cell is the TDD uplink and downlink configuration 2
- the secondary cell is the TDD uplink and downlink configuration 1, and the two cells are aggregated to one UE for data transmission, and it is assumed that the UL_grant corresponding to the PUSCH on the secondary cell is transmitted in the primary cell.
- the PHICH must be fed back on the primary cell.
- the uplink scheduling timing of the first group of subframes may be according to the uplink scheduling timing of the secondary cell (
- the second reference TDD uplink and downlink configuration is performed, that is, the UL_grant and the corresponding PHICH are respectively sent on the subframe 9 and the subframe 4 of the primary cell, and the PHICH may not be sent at this time, because the primary cell has no PHICH resources of the backward compatible system.
- the uplink scheduling timing of the second group of subframes may be performed according to the uplink scheduling timing of the primary cell (the third reference TDD uplink and downlink configuration), that is, the UL_grant and the corresponding PHICH are respectively sent on the subframe 8 and the subframe 3 of the primary cell. This ensures a shorter UL_grant scheduling delay, and there is a PHICH resource of the backward compatible system in the corresponding subframe of the primary cell.
- the normal scheduling of the PUSCH of the SCell can be effectively ensured, and the normal communication between the base station and the UE is effectively ensured.
- Embodiment of the present invention provides a base station for a CA system, perform the above method, comprising: processing means for generating a secondary cell for the uplink sub-frame n user equipment scheduling PUSCH scheduling information UL_ gra nt And determining, by using a timing relationship of the uplink scheduling according to the first reference TDD uplink and downlink configuration, a subframe index j of a subframe in which the scheduling information UL_grant of the PUSCH of the subframe n of the secondary cell is transmitted;
- a sending unit configured to send, by using the subframe j of the primary cell, the UL_grant generated by the processing unit to the user equipment.
- the uplink scheduling timing relationship of the first reference TDD uplink and downlink configuration includes:
- the UL_grant corresponds to the timing relationship of the PUSCH, or the PUSCH corresponds to the timing relationship of the PHICH, wherein the PHICH is a downlink ACK/NACK.
- the first reference TDD uplink and downlink configuration is a TDD uplink and downlink configuration of the primary cell, or a TDD uplink and downlink configuration of the secondary cell, or a TDD uplink and downlink configuration 0, or a TDD uplink and downlink configuration 6, or TDD uplink and downlink configuration 1.
- the processing unit is specifically configured to determine, according to a part of the uplink scheduling timing relationship in the at least one HARQ process of the TDD uplink and downlink configuration 6, The subframe index j of the subframe of the scheduling information UL grant of the PUSCH of the uplink subframe n of the secondary cell.
- the processing unit is specifically configured to use part or all of the uplink scheduling timing relationship of the at least one uplink index of the TDD uplink and downlink configuration 0.
- the timing relationship determines a subframe index of a subframe in which the scheduling information UL_grant of the PUSCH of the uplink subframe n of the secondary cell is transmitted.
- the processing unit is further configured to determine, according to the at least two first reference TDD uplink and downlink configurations, the auxiliary The first reference TDD uplink and downlink configuration corresponding to the subframe n of the cell is specifically used to determine, according to the determined uplink scheduling timing relationship of the first reference TDD uplink and downlink configuration corresponding to the subframe n of the secondary cell, The subframe index j of the subframe of the PUSCH scheduling information UL_grant of the subframe n of the cell.
- the base station for the CA system provided in this embodiment can effectively ensure the normal scheduling of the PUSCH of the SCell in the CA system with different uplink and downlink configurations, and effectively ensure the between the base station and the UE. Communicate normally.
- the embodiment of the invention provides a communication method for a CA system. Based on the user equipment, the embodiment includes the following steps:
- UL_ PUSCH scheduling information message is received subframe n sub master base station cell transmitting the frame j secondary cell gra nt, where j is determined according to the timing relationship between the uplink scheduling a first reference TDD UL transmission of the a subframe index of a subframe of the scheduling information UL_grant of the PUSCH of the subframe n of the secondary cell;
- the uplink scheduling timing relationship of the first reference TDD uplink and downlink configuration includes:
- the UL_grant corresponds to the timing relationship of the PUSCH, or the PUSCH corresponds to the timing relationship of the PHICH, wherein the PHICH is a downlink ACK/NACK.
- the first reference TDD uplink and downlink configuration is a TDD uplink and downlink configuration of the primary cell, or a TDD uplink and downlink configuration of the secondary cell, or a TDD uplink and downlink configuration 0, or a TDD uplink and downlink configuration 6, or TDD uplink and downlink configuration 1.
- the j is the sending the secondary cell according to a part of the uplink scheduling timing relationship in the at least one HARQ process of the TDD uplink and downlink configuration 6.
- the j is determined according to part or all of the timing relationships in the uplink scheduling timing relationship of the at least one uplink index of the TDD uplink and downlink configuration 0.
- the method further includes: determining, by using the at least two first reference TDD uplink and downlink configurations, the subframe of the secondary cell n corresponding to the first reference TDD uplink and downlink configuration; the j is determined according to the determined uplink scheduling timing relationship of the first reference TDD uplink and downlink corresponding to the subframe n of the secondary cell, and the sending of the secondary cell
- the method for the CA system provided in this embodiment can effectively ensure the normal scheduling of the PUSCH of the SCell in the CA system with different uplink and downlink configurations of each carrier, and effectively ensure normal communication between the base station and the UE.
- An embodiment of the present invention provides a user equipment for a CA system, which is used to perform the foregoing method, including:
- Receiving means for receiving base station sub-frame of the scheduling information UL_ secondary cell j transmits the information frame n gra nt PUSCH in sub-master cell, wherein the base station j is an uplink downlink configuration according to a first reference TDD a subframe index of a subframe in which the scheduling information UL_grant of the PUSCH of the subframe n of the secondary cell is transmitted, determined by the scheduled timing relationship;
- a sending unit configured to send the PUSCH in a subframe n of the secondary cell according to the scheduling information UL grant of the PUSCH received by the receiving unit.
- the uplink scheduling timing relationship of the first reference TDD uplink and downlink configuration includes: a timing relationship of a UL_grant corresponding to a PUSCH, or a timing relationship of a PUSCH corresponding to a PHICH, where the PHICH is a downlink ACK/NACK.
- the first reference TDD uplink and downlink configuration is a TDD uplink and downlink configuration of the primary cell, or a TDD uplink and downlink configuration of the secondary cell, or a TDD uplink and downlink configuration 0, or a TDD uplink and downlink configuration 6, or TDD uplink and downlink configuration 1.
- the j is the sending the secondary cell according to a part of the uplink scheduling timing relationship in the at least one HARQ process of the TDD uplink and downlink configuration 6.
- the j is determined according to part or all of the timing relationships in the uplink scheduling timing relationship of the at least one uplink index of the TDD uplink and downlink configuration 0.
- the j is determined by the base station according to the uplink and downlink configuration from the at least two first reference TDDs.
- the subframe index of the subframe of the scheduling information UL_grant of the PUSCH of the subframe n of the secondary cell determined by the uplink scheduling timing relationship of the first reference TDD uplink and downlink configuration corresponding to the subframe n of the secondary cell.
- the user equipment for the CA system provided in this embodiment can effectively ensure the normal scheduling of the PUSCH of the SCell in the CA system with different uplink and downlink configurations, and effectively ensure normal communication between the base station and the UE.
- the foregoing program may be stored in a computer readable storage medium, and the program, when executed, performs the steps including the foregoing method embodiments; and the foregoing storage medium includes: a ROM, A variety of media that can store program code, such as RAM, disk, or optical disk.
Description
Claims
Priority Applications (14)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
PL18152862T PL3407521T3 (pl) | 2011-02-24 | 2012-02-24 | Sposób komunikacji i urządzenie dla systemu agregacji nośnych |
EP18152862.1A EP3407521B1 (en) | 2011-02-24 | 2012-02-24 | Communication method and apparatus for carrier aggregation system |
JP2013554785A JP5793810B2 (ja) | 2011-02-24 | 2012-02-24 | キャリアアグリゲーションシステムに関する通信方法および装置 |
CN201280009377.2A CN103392369B (zh) | 2011-02-24 | 2012-02-24 | 用于载波聚合系统的通信方法和装置 |
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