WO2011124127A1 - 调度信令发送及应答反馈的方法、系统和设备 - Google Patents
调度信令发送及应答反馈的方法、系统和设备 Download PDFInfo
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- WO2011124127A1 WO2011124127A1 PCT/CN2011/072460 CN2011072460W WO2011124127A1 WO 2011124127 A1 WO2011124127 A1 WO 2011124127A1 CN 2011072460 W CN2011072460 W CN 2011072460W WO 2011124127 A1 WO2011124127 A1 WO 2011124127A1
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- downlink
- data packet
- scheduling signaling
- terminal
- ack
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Classifications
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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
-
- 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
- H04L1/1607—Details of the supervisory signal
-
- 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
- H04L1/1861—Physical mapping arrangements
Definitions
- the present invention relates to the field of wireless communications, and in particular, to a method, system, and device for scheduling signaling transmission and response feedback. Background technique
- the uplink and downlink carriers in the system can be asymmetrically configured, that is, the user may occupy one carrier for downlink transmission, and M ⁇ 1 carrier.
- Uplink transmission as shown in Figure 2.
- HARQ hybrid automatic repeat request
- ACK/NACK acknowledge/negative acknowledgement
- the PUSCH can be used in the method of the Rel 8 system. Simultaneous transmission of uplink data and ACK/NACK; PUSCH and Physical Uplink Control Channel (PUCCH) can also be transmitted simultaneously in the same subframe. At this time, PUCCH format 2/2a/2b in the Rel 8 system can be reused to transmit multi-bit ACK/NACK. A new PUCCH structure is also introduced to carry large-capacity uplink control information, including channel quality indication (CQI), ACK/NACK, and the like.
- CQI channel quality indication
- the Long Term Evolution Upgrade (LTE-A) system is currently determined to support up to 5 carriers for aggregation.
- a plurality of downlink carriers and downlink subframes that require ACK/NACK feedback in the same subframe are hereinafter referred to as "feedback windows".
- the size of the feedback window L the number of downlink carriers aggregated by the UE.
- N the number of downlink carriers aggregated by the UE
- M corresponds to the number of downlink subframes that are fed back in the same uplink subframe.
- M The values are different, that is, the number of each column K in Table 1.
- Embodiments of the present invention provide a scheduling signaling sending method and a base station in a multi-carrier aggregation system, which are used to improve transmission efficiency in a multi-carrier aggregation system.
- a scheduling signaling sending method in a multi-carrier aggregation system comprising:
- the base station needs to carry the counting information in the downlink scheduling signaling, and send the downlink scheduling signaling to the terminal, when the scheduling terminal receives the downlink data packet in the current feedback window;
- the base station When the base station needs to send the physical uplink shared channel (PUSCH) in the uplink subframe corresponding to the current feedback window, the base station carries the downlink data packet transmission information in the current feedback window in the uplink scheduling signaling, and sends the uplink scheduling signaling.
- PUSCH physical uplink shared channel
- the counting information is information for determining, by the terminal, a position in an ACK/NACK sequence sent by the acknowledgement/negative acknowledgement ACK/NACK information corresponding to the downlink data packet scheduled by the downlink scheduling signaling in the uplink subframe;
- the downlink data packet transmission situation information is used by the terminal to determine the length of the ACK/NACK sequence.
- the current feedback window includes a base station required by multiple downlink component carriers supported by the terminal, and the base station includes:
- the downlink scheduling signaling sending unit is configured to: when the scheduling terminal receives the downlink data packet in the current feedback window, the counting information is carried in the downlink scheduling signaling, and the downlink scheduling signaling is sent to the terminal;
- the uplink scheduling signaling sending unit is configured to: when the scheduling terminal sends the physical uplink shared channel PUSCH in the uplink subframe corresponding to the current feedback window, the downlink data packet transmission situation information in the current feedback window is carried in the uplink scheduling signaling, And sending the uplink scheduling signaling to the terminal;
- the counting information is information for determining, by the terminal, a position in an ACK/NACK sequence sent by the acknowledgement/negative acknowledgement ACK/NACK information corresponding to the downlink data packet scheduled by the downlink scheduling signaling in the uplink subframe;
- the downlink data packet transmission situation information is used by the terminal to determine the length of the ACK/NACK sequence; the current feedback window includes multiple downlink component carriers supported by the terminal.
- the base station carries the counting information in the downlink scheduling signaling and sends the information to the terminal, and the downlink data packet transmission information is carried in the uplink scheduling signaling and sent to the terminal.
- the terminal in the multi-carrier aggregation system of the present scheme can obtain information for determining the length of the ACK/NACK sequence that needs to be transmitted and the location of the ACK/NACK information corresponding to the downlink data packet in the ACK/NACK sequence.
- the embodiment of the invention further provides a response feedback method in a multi-carrier aggregation system, a terminal and an LTE-A communication system, which are used to improve the transmission efficiency of the multi-carrier aggregation system.
- a response feedback method in a multi-carrier aggregation system comprising:
- the terminal receives the downlink scheduling signaling that the base station sends the downlink data packet in the current feedback window, and the uplink that is sent by the base station to send the physical uplink shared channel PUSCH in the uplink subframe corresponding to the current feedback window.
- Scheduling signaling the downlink scheduling signaling carries the counting information, where the uplink scheduling signaling carries the downlink data packet transmission situation information in the current feedback window;
- the terminal generates an ACK/NACK sequence according to the determined length and location information, and transmits the ACK/NACK sequence to the base station.
- a terminal comprising:
- the scheduling signaling receiving unit is configured to receive, by the base station, the downlink scheduling signaling that is sent by the base station to receive the downlink data packet in the current feedback window, and the scheduling of the current terminal sent by the base station is sent in the uplink subframe corresponding to the current feedback window.
- a feedback sequence length location determining unit configured to determine, according to the downlink data packet transmission situation information Determining the length of the ACK/NACK sequence of the ACK/NACK sequence sent in the uplink subframe, and determining, according to the counting information, ACK/NACK information corresponding to the downlink data packet scheduled by the downlink scheduling signaling in the ACK/ The position in the NACK sequence;
- a feedback sequence sending unit configured to generate an ACK/NACK sequence according to the length and location information determined by the feedback sequence length position determining unit, and send the ACK/NACK sequence to the base station.
- a long-term evolution upgrade LTE-A communication system includes:
- the base station is configured to: when the scheduling terminal receives the downlink data packet in the current feedback window, the counting information is carried in the downlink scheduling signaling, and the downlink scheduling signaling is sent to the terminal; the scheduling terminal needs to be uplinked in the current feedback window.
- the scheduling terminal receives the downlink data packet in the current feedback window, the counting information is carried in the downlink scheduling signaling, and the downlink scheduling signaling is sent to the terminal; the scheduling terminal needs to be uplinked in the current feedback window.
- the physical uplink shared channel PUSCH is sent in the subframe
- the downlink data packet transmission situation information in the current feedback window is carried in the uplink scheduling signaling, and the uplink scheduling signaling is sent to the terminal; the current feedback window includes terminal support.
- the terminal can determine the length of the received feedback information sequence that needs to be sent in the uplink subframe according to the downlink data packet transmission situation information carried in the uplink scheduling signaling, and determine the downlink data packet according to the counting information carried in the downlink scheduling signaling.
- the position of the corresponding ACK/NACK information in the ACK/NACK sequence, thereby generating an ACK/NACK sequence according to the determined length and position information and transmitting to the base station, can effectively improve the transmission efficiency of the system.
- FIG. 1 is a schematic diagram of a single spectrum system in the prior art
- FIG. 2 is a schematic diagram of a spectrum aggregation system in the prior art
- FIG. 3 is a schematic flowchart of a method according to an embodiment of the present disclosure
- 4A is a schematic diagram of PDSCH scheduling in Embodiment 1 of the present invention.
- 4B is a schematic diagram of correspondence of ACK/NACK sequences in Embodiment 1 of the present invention.
- FIG. 4C is a schematic diagram of another ACK/NACK sequence correspondence according to Embodiment 1 of the present invention
- FIG. 4D is a schematic diagram of ACK/NACK sequence correspondence according to Embodiment 2 of the present invention.
- 4E is a schematic diagram of another ACK/NACK sequence correspondence according to Embodiment 2 of the present invention.
- 4F is a schematic diagram of another ACK/NACK sequence correspondence according to Embodiment 3 of the present invention.
- FIG. 5 is a schematic structural diagram of a system according to an embodiment of the present disclosure.
- FIG. 6 is a schematic structural diagram of a base station according to an embodiment of the present disclosure.
- FIG. 7 is a schematic structural diagram of a terminal according to an embodiment of the present invention. detailed description
- the length of each ACK/NACK sequence carrying the ACK/NACK information and each data packet can be determined.
- the corresponding ACK/NACK information is located in the ACK/NACK sequence, thereby improving the transmission efficiency of the system.
- the embodiment of the present invention provides a method for sending and responding to the scheduling signaling in the multi-carrier aggregation system.
- the terminal Determining, according to the downlink data packet transmission situation information in the uplink scheduling signaling, the length of the ACK/NACK sequence that needs to be sent in the uplink subframe, and determining, according to the counting information in the downlink scheduling signaling, the ACK/NACK information corresponding to the downlink data packet in the ACK The location in the /NACK sequence.
- a method for sending and receiving uplink scheduling signaling in a multi-carrier aggregation system includes the following steps:
- Step 30 The base station needs to schedule the terminal to transmit the downlink data packet in the current feedback window when the PUSCH is sent in the uplink subframe corresponding to the current feedback window.
- the current feedback window includes multiple downlink component carriers supported by the terminal. a downlink subframe in which the data packet receives the feedback information in the uplink subframe;
- the downlink data packet transmission situation in the current feedback window refers to the downlink data packet transmission condition on the downlink transmission resource included in the current feedback window, and the downlink transmission resource included in the current feedback window is supported by multiple downlink component carriers supported by the terminal.
- a downlink subframe configuration in which the packet reception feedback information is transmitted in the uplink subframe is required.
- the downlink subframe that needs to send the data packet to receive the feedback information in the uplink subframe is that the terminal needs to send the received feedback information of the downlink data packet received in the downlink subframe in the uplink subframe.
- the receiving feedback information of the downlink data packets that need to be received in the downlink subframes in an uplink subframe may be determined according to Table 1.
- the downlink component carriers in the feedback window are the downlink member carriers in the configured downlink member carrier set or the downlink member carriers in the downlink member carrier set.
- the uplink subframe corresponding to the current feedback window refers to the uplink subframe corresponding to the downlink subframe included in the current feedback window, and the corresponding relationship has been preset.
- the base station sends multiple uplink scheduling signaling to the terminal in a downlink subframe, the value of the downlink data transmission situation information carried in each uplink scheduling signaling is the same.
- Step 31 The base station carries the information about the downlink data packet transmission status in the current feedback window to the uplink scheduling signaling (UL grant), and sends the uplink scheduling signaling to the terminal.
- UL grant uplink scheduling signaling
- Step 32 The terminal receives the uplink scheduling signaling, and determines, according to the downlink data packet transmission situation information, a length of the received feedback information sequence that needs to be sent in the uplink subframe.
- Step 33 The terminal sends a sequence of received feedback information having the length to the base station.
- step 30 the base station determines the downlink data packet transmission in the current feedback window, and the specific implementation may use the following two types:
- the base station determines the total number of downlink subframes in which the downlink packet scheduling transmission is performed in the current feedback window, and uses the total number of downlink subframes as the downlink packet transmission situation information in the current feedback window.
- the base station determines the total number of downlink data packets scheduled to be transmitted in the current feedback window, and The total number of downlink packets is used as the downlink packet transmission status information in the current feedback window.
- the base station may also need to be in the current feedback window.
- the intra-scheduling terminal sends a downlink scheduling signaling (DL grant) carrying the counting information to the terminal, where the counting information indicates that the downlink subframe in which the downlink data packet is sent is the downlink data packet scheduling transmission in the current feedback window.
- DL grant downlink scheduling signaling
- the transmission of the downlink scheduling signaling may be sent in the same subframe as the uplink scheduling signaling or in the same subframe as the uplink scheduling signaling.
- the base station may also need to be in the current feedback window.
- the scheduling terminal sends the downlink scheduling signaling carrying the counting information to the terminal, where the counting information indicates that the downlink data packet scheduled by the downlink scheduling signaling is the first downlink data packet scheduled to be transmitted in the feedback window.
- the transmission of the downlink scheduling signaling may be sent in the same subframe as the uplink scheduling signaling or in the same subframe as the uplink scheduling signaling.
- the above counting information may be carried in the DAI domain of the downlink scheduling signaling.
- the terminal acquires counting information from the DAI domain of the downlink scheduling signaling.
- the base station may carry the information about the downlink data packet transmission status in the current feedback window in the Downlink Assignment Index (DAI) field of the uplink scheduling signaling.
- the terminal acquires downlink packet transmission situation information in the feedback window from the DAI domain of the uplink scheduling signaling.
- DAI Downlink Assignment Index
- the value of the DAI domain in each uplink scheduling signaling is the same.
- step 32 if the downlink data packet transmission situation information carried in the uplink scheduling signaling is the total number of downlink subframes in which the downlink data packet scheduling transmission is performed in the feedback window, the terminal according to the downlink data packet
- the transmission situation information determines the length of the sequence of the received feedback information that needs to be sent in the uplink subframe, and the specific implementation may be as follows:
- the terminal determines an acknowledgement/negative response that needs to be sent in the uplink subframe according to the following formula
- step 33 the terminal sends a sequence of receiving feedback information with the length to the base station, and the specific implementation may be as follows:
- the terminal receives the downlink scheduling signaling sent by the downlink subframe in the feedback window, where the downlink scheduling signaling carries the counting information, where the counting information indicates that the downlink subframe is the number of the downlink data packet scheduling transmission in the feedback window.
- the downlink subframe is received by the terminal before the terminal receives the uplink scheduling signaling or in the downlink subframe that sends the uplink scheduling signaling.
- the terminal determines the bit position of the ACK/NACK information corresponding to the downlink data packet scheduled by each downlink scheduling signaling in the ACK/NACK sequence according to the received counting information in each downlink scheduling signaling.
- the terminal generates an ACK/NACK sequence with a Q number of bits according to the determined bit position and the received status of the downlink data packet scheduled by each downlink scheduling signaling, and sends the ACK/NACK sequence to the base station.
- the Q bit in the ACK/NACK sequence is divided into M parts; if the value of the counting information is P, the downlink subframe in which the downlink data packet scheduled by the downlink scheduling signaling is sent is located in the multiple On the first carrier of the downlink component carrier, when the single codeword is transmitted, it is determined that the downlink data packet corresponds to The ACK/NACK information occupies the first bit position of the P part of the M part; when the multi-codeword is transmitted, it is determined that the ACK/NACK information corresponding to the downlink data packet occupies the P part of the M part 2*1-1 and 2*1 bit positions.
- the total number of downlink subframes in which the downlink packet scheduling transmission is performed in the feedback window is 2, and the number of bits of the ACK/NACK sequence determined by the terminal according to this is 6, and the downlink in the feedback window
- the value of the count information carried in the downlink scheduling signaling received in the first downlink subframe of the carrier 1 is 1 and is received in the downlink scheduling signaling received in the first downlink subframe of the downlink carrier 2 in the feedback window.
- the value of the count information carried is 1, and the value of the count information carried in the downlink scheduling signaling received on the third downlink subframe of the downlink carrier 2 in the feedback window is 2, and the 6-bit ACK/NACK sequence to be transmitted is required.
- bO is used to carry the downlink data packet scheduled by the downlink scheduling signaling received on the first downlink subframe of the downlink carrier 1 in the feedback window.
- Receiving feedback information if the terminal correctly receives the downlink data packet, bO may be set to 0 indicating ACK, if the terminal does not correctly receive the downlink data packet, bO may be set to 1 indicating NACK; bl is used to carry feedback Inside the window
- the receiving feedback information corresponding to the downlink data packet scheduled by the downlink scheduling signaling received in the first downlink subframe of the line carrier 2 if the terminal correctly receives the downlink data packet, the bl may be set to 0 indicating the ACK, if If the terminal does not correctly receive the downlink data packet, bl may be set to 1 indicating NACK; since the downlink data packet is not received in the first downlink subframe of downlink carrier 3 in the feedback window, b2 is set to represent NACK.
- b3 is set to 1 indicating NACK
- b4 is used to carry the third of downlink carrier 2 in the feedback window Receive feedback information corresponding to the downlink data packet scheduled by the downlink scheduling signaling received in the downlink subframe. If the terminal correctly receives the downlink data packet, b4 may be set to 0 indicating ACK, if the terminal does not correctly receive the downlink For the data packet, b4 can be set to 1 indicating NACK; since the downlink packet is not received on the third downlink subframe of downlink carrier 3 in the feedback window, b5 Is set to 1 indicates the NACK.
- the value of the counting information is P
- the downlink subframe of the downlink data packet scheduled by the downlink scheduling signaling is located on the first carrier of the multiple downlink component carriers, determining the downlink Number
- the ACK/NACK information corresponding to the packet occupies the c′′+1 and the first ⁇ bits of the P part of the M part, where C Dyna is the number of codewords on the carrier “When the single codeword is transmitted ⁇ 1.
- C Dynamic is the number of codewords on the carrier “When the single codeword is transmitted ⁇ 1.
- c is.
- step 32 if the downlink data packet transmission situation information carried in the uplink scheduling signaling is the total number of downlink data packets scheduled to be transmitted in the feedback window, the terminal determines, according to the downlink data packet transmission situation information, that the uplink subframe needs to be
- the length of the sequence of received feedback information sent in the specific implementation can be as follows:
- the terminal determines the number of bits included in the ACK/NACK sequence to be transmitted in the uplink subframe according to the following formula Q:
- M is the total number of downlink packets.
- step 33 the terminal sends a sequence of receiving feedback information with the length to the base station, and the specific implementation may be as follows:
- the terminal receives the downlink scheduling signaling sent by the downlink subframe in the feedback window, where the downlink scheduling signaling carries the counting information, where the counting information indicates that the downlink data packet scheduled by the downlink scheduling signaling is in the feedback window.
- the first downlink data packet is scheduled to be transmitted; the terminal may receive the downlink scheduling signaling before the terminal receives the uplink scheduling signaling or in the downlink subframe that sends the uplink scheduling signaling.
- the terminal determines the bit position of the ACK/NAC information corresponding to the downlink data packet scheduled by each downlink scheduling signaling in the ACK/NACK sequence according to the received counting information in each downlink scheduling signaling.
- the terminal generates an ACK/NACK sequence with a Q number of bits according to the determined bit position and the received downlink data packet scheduled by the downlink scheduling signaling, and sends the ACK/NACK sequence to the base station.
- the downlink data packet scheduled by the downlink scheduling signaling is the first data packet received in the current feedback window, determining that the ACK/NACK information corresponding to the downlink data packet occupies the ACK/NACK sequence The first bit position.
- the total number of downlink packets scheduled to be transmitted in the feedback window is 3.
- the number of bits of the ACK/NACK sequence determined by the terminal is 3, and the value of the count information carried in the downlink scheduling signaling received in the first downlink subframe of the downlink carrier 1 in the feedback window is 1.
- the value of the count information carried in the downlink scheduling signaling received in the first downlink subframe of the downlink carrier 2 in the feedback window is 2, and is received on the third downlink subframe of the downlink carrier 2 in the feedback window.
- the value of the count information carried in the downlink scheduling signaling is 3, and in the 3-bit ACK/NACK sequence ⁇ bO, bl, b2 ⁇ to be transmitted, bO is used to carry the first one of the downlink carrier 1 in the feedback window.
- Packet, bO may be set to represent 1 for NACK; bl is used to carry the received feedback information corresponding to the downlink data packet scheduled by the downlink scheduling signaling received in the first downlink subframe of the downlink carrier 2 in the feedback window. If the terminal is correct After receiving the downlink data packet, bl may be set to 0 indicating ACK. If the terminal does not correctly receive the downlink data packet, bl may be set to 1 indicating NACK; b2 is used to carry downlink carrier 2 in the feedback window. Receive feedback information corresponding to the downlink data packet scheduled by the downlink scheduling signaling received on the three downlink subframes. If the terminal correctly receives the downlink data packet, b2 may be set to 0 indicating ACK, if the terminal does not correctly receive the For the downlink packet, b2 can be set to 1 indicating NACK.
- Method 1 For multi-bit ACK/NACK multiplex feedback, for the uplink subframe with UL grant scheduling, Method 1: Use the DAI in the UL grant to indicate the number of downlink subframes in the feedback window for packet scheduling transmission, and re-use R8 TDD UL
- the 2-bit DAI in grant, M 2 in the example shown in Figure 4A.
- the time-frequency resource without data transmission corresponds to the feedback NACK.
- the DAI in the DL grant acts as a counter, indicating that the subframe in which the current scheduled packet is transmitted is feedback.
- Embodiment 1 is a diagrammatic representation of Embodiment 1:
- the configured downlink carrier set is ⁇ downlink carrier 1, downlink carrier 2, and downlink carrier 3 ⁇ , wherein the activated carrier is downlink carrier 1 and downlink carrier 2.
- the UE shall feed back 6-bit ACK/NACK information ⁇ b0, bl, ..., b5 ⁇ , where b2, b3, and b5 are NACK, as shown in FIG. 4B. Shown.
- the UE shall feed back 4-bit ACK/NACK information ⁇ b0, bl, b2, b3 ⁇ , where b2 is NACK, as shown in FIG. 4C.
- the DAI in the DL grant is used as a counter, indicating that the current scheduling data packet is the first data packet belonging to the UE in the feedback transmission, and the counting order is performed in the order of the time domain after the frequency domain, as in the case of PDSCH1 in FIG. 4A.
- the UE can determine the location of the ACK/NACK information of the corresponding data packet in the feedback information sequence according to the DAI in the DL grant. If a packet loss is found, a NACK is fed back.
- Embodiment 2 is a diagrammatic representation of Embodiment 1:
- Method 3 The number of downlink subframes in the UL grant using the DAI indication feedback window for packet scheduling transmission, and the 2-bit DAI in the R8 TDD UL grant can be reused, in the example shown in FIG. 4E.
- Embodiment 3 is a diagrammatic representation of Embodiment 3
- the downlink carrier set configured by the UE is ⁇ downlink carrier 1, downlink carrier 2, downlink carrier 3 ⁇ , wherein the activated carrier is downlink carrier 1 and downlink carrier 2, and downlink carrier 1 is for single codeword transmission, and downlink carrier 2 is for downlink code carrier 2 For multi-codeword transmission.
- N is the number of carriers in the configured downlink carrier set
- the UE needs to feed back 8-bit ACK/NACK information ⁇ b0, bl, ..., b7 ⁇ , where b3, b4, and b7 are NACK, as shown in Figure 4E. Shown.
- the UE shall feed back 6-bit ACK/NACK information ⁇ b0, bl, ..., b5 ⁇ , where b3 is NACK, as shown in FIG. 4F.
- the base station since the base station knows exactly which resources have no data scheduling, it can know which positions in the feedback sequence corresponding to the feedback information is NACK, so when receiving and demodulating the feedback information of the UE, the corresponding The information is decoded as known information, thereby reducing the actual coding rate and improving the reliability of the feedback information.
- an embodiment of the present invention further provides an LTE-A communication system, where the system includes: a base station 50, configured to: when a scheduling terminal receives a downlink data packet in a current feedback window, carry the counting information in downlink scheduling signaling. And sending the downlink scheduling signaling to the terminal; when the scheduling terminal sends the physical uplink shared channel PUSCH in the uplink subframe corresponding to the current feedback window, the downlink data packet transmission situation information in the current feedback window is carried in the uplink scheduling.
- a base station 50 configured to: when a scheduling terminal receives a downlink data packet in a current feedback window, carry the counting information in downlink scheduling signaling. And sending the downlink scheduling signaling to the terminal; when the scheduling terminal sends the physical uplink shared channel PUSCH in the uplink subframe corresponding to the current feedback window, the downlink data packet transmission situation information in the current feedback window is carried in the uplink scheduling.
- the current feedback window includes a plurality of downlink component carrier terminals 51 supported by the terminal, configured to receive the uplink scheduling signaling and downlink scheduling signaling, according to the downlink data packet transmission situation information. Determining a length of the ACK/NACK sequence to be sent in the uplink subframe, and determining, according to the counting information, ACK/NACK information corresponding to the downlink data packet scheduled by the downlink scheduling signaling in the ACK a position in the /NACK sequence; generating an ACK/NACK sequence based on the determined length and position information, and transmitting the ACK/NACK sequence to the base station.
- the base station 50 is used to:
- the total number of downlink subframes in which the downlink packet scheduling transmission is performed in the current feedback window is carried in the uplink scheduling signaling, and the uplink scheduling signaling is sent to the terminal;
- the terminal 51 is used to:
- the number of bits included in the ACK/NACK sequence to be transmitted in the uplink subframe is determined according to the following formula Q:
- Q C*N*M, where C is the number of codewords, C is 1 for single codeword transmission, and C is 2 for multicodeword transmission; N is the downlink component carrier of the downlink component carrier set configured for the terminal on the network side. The number of the downlink component carriers in the active state of the downlink component carrier set; M is the total number of the downlink subframes; or
- ⁇ ⁇ ⁇ , where C Decision is the number of code words on the carrier “When the single code word is transmitted ⁇ is multi-codeword transmission ( ⁇ is 2; N is the downlink component carrier in the downlink component carrier set configured by the network side for the terminal) The number of downlink member carriers in the active state of the downlink component carrier set; ⁇ is 1 on the inactive carrier; M is the total number of the downlink subframes.
- the base station 50 is used to:
- the downlink subframe indicating that the downlink data packet scheduled by the downlink scheduling signaling is sent is the counting information of the downlink subframes in the downlink window that is scheduled to be transmitted in the feedback window, and is carried in the downlink scheduling signaling. And sending the downlink scheduling signaling to the terminal;
- the terminal 51 is configured to:
- the downlink subframe of the downlink data packet scheduled to be sent by the downlink scheduling signaling is located on the first carrier of the multiple downlink component carriers, when the single codeword is transmitted. Determining that the ACK/NACK information corresponding to the downlink data packet occupies the first bit position of the P part of the M part; when the multi-codeword is transmitted, determining the ACK/NACK information corresponding to the downlink data packet The 2*1-1th and 2*1th bit positions of the Pth part of the M part.
- the downlink subframe of the downlink data packet scheduled by the downlink scheduling signaling is located on the first carrier of the multiple downlink component carriers, determining the downlink
- the ACK/NACK information corresponding to the data packet occupies the c′′+1 and the ⁇ recreationalbit positions of the P part of the M part, where C Dyna is the number of codewords on the carrier “When the single codeword is transmitted ⁇ 1.
- C Dyna is the number of codewords on the carrier “When the single codeword is transmitted ⁇ 1.
- c is.
- the base station 50 is used to:
- the terminal 51 is used to:
- the number Q of bits included in the ACK/NACK sequence to be transmitted in the uplink subframe is determined according to the following formula, and an ACK/NACK sequence with a Q number of bits is transmitted to the base station:
- the base station 50 is used to:
- the terminal 51 is configured to: If the downlink data packet scheduled by the downlink scheduling signaling is received in the current feedback window
- the ACK/NACK information corresponding to the downlink data packet occupies the first bit position of the ACK/NACK sequence.
- the base station 50 is used to:
- the value of the downlink packet transmission situation information carried in each uplink scheduling signaling is the same.
- an embodiment of the present invention further provides a base station, which can be applied to the foregoing LTE-A communication system, where the base station includes:
- the downlink scheduling signaling sending unit 60 is configured to: when the scheduling terminal receives the downlink data packet in the current feedback window, the counting information is carried in the downlink scheduling signaling, and the downlink scheduling signaling is sent to the terminal;
- the uplink scheduling signaling sending unit 61 is configured to: when the scheduling terminal needs to send the physical uplink shared channel PUSCH in the uplink subframe corresponding to the current feedback window, the downlink data packet transmission situation information in the current feedback window is carried in the uplink scheduling signaling. And sending the uplink scheduling signaling to the terminal;
- the counting information is information for determining, by the terminal, a position in an ACK/NACK sequence sent by the acknowledgement/negative acknowledgement ACK/NACK information corresponding to the downlink data packet scheduled by the downlink scheduling signaling in the uplink subframe;
- the downlink data packet transmission situation information is used by the terminal to determine the length of the ACK/NACK sequence.
- the current feedback window includes the uplink scheduling signaling sending unit 61 on the plurality of downlink component carriers supported by the terminal. :
- the uplink scheduling signaling sending unit 61 is configured to:
- the downlink scheduling signaling sending unit 60 is configured to:
- the uplink scheduling signaling sending unit When the uplink scheduling signaling sending unit carries the total number of downlink subframes in which the downlink packet scheduling transmission is performed in the current feedback window in the uplink scheduling signaling, it indicates that the downlink scheduled by the downlink scheduling signaling is sent.
- the downlink sub-frame of the data packet is the downlink information of the downlink sub-frames in which the downlink data packet scheduling transmission is performed in the feedback window, and the downlink scheduling signaling is sent to the terminal.
- the downlink scheduling signaling sending unit 60 is configured to:
- the uplink scheduling signaling sending unit When the uplink scheduling signaling sending unit carries the total number of downlink data packets scheduled to be transmitted in the current feedback window in the uplink scheduling signaling, the downlink data packet scheduled by the downlink scheduling signaling is the feedback.
- the counting information of the downlink packets that are scheduled to be transmitted in the window is carried in the downlink scheduling signaling, and the downlink scheduling signaling is sent to the terminal.
- the uplink scheduling signaling sending unit 61 is configured to:
- the uplink scheduling signaling sending unit 61 is configured to:
- the value of the DAI domain in each uplink scheduling signaling is the same.
- the downlink scheduling signaling sending unit 60 is configured to:
- the counting information is carried in a DAI domain of the downlink scheduling signaling.
- the plurality of downlink component carriers supported by the terminal are:
- the network side is a plurality of downlink component carriers in the downlink component carrier set configured by the terminal; or, the network side is a plurality of downlink component carriers in an active state in the downlink component carrier set configured by the terminal.
- an embodiment of the present invention further provides a terminal, which can be applied to the foregoing LTE-A communication system, where the terminal includes:
- the scheduling signaling receiving unit 70 is configured to receive the scheduling current terminal sent by the base station in the current feedback window. Receiving the downlink scheduling signaling of the downlink data packet, and sending, by the base station, the uplink scheduling signaling that the local terminal sends the physical uplink shared channel PUSCH in the uplink subframe corresponding to the current feedback window; the downlink scheduling signaling carries the counting information The uplink scheduling signaling carries downlink data packet transmission situation information in the current feedback window;
- the feedback sequence length position determining unit 71 is configured to determine, according to the downlink data packet transmission situation information, a length of an acknowledgement/negative acknowledgement ACK/NACK sequence that needs to be sent in the uplink subframe, and determine the downlink according to the counting information. The location of the ACK/NACK information corresponding to the downlink data packet scheduled by the scheduling signaling in the ACK/NACK sequence;
- the feedback sequence sending unit 72 is configured to generate an ACK/NACK sequence according to the length and location information determined by the feedback sequence length position determining unit, and send the ACK/NACK sequence to the base station.
- the feedback sequence length position determining unit 71 is configured to:
- the downlink data packet transmission situation information is the total number of downlink subframes in which the downlink data packet scheduling transmission is performed in the feedback window, determining that the uplink subframe needs to be sent according to the following formula
- Q C*N*M, where C is the number of codewords, C is 1 for single codeword transmission, and C is 2 for multicodeword transmission; N is the downlink component carrier of the downlink component carrier set configured for the terminal on the network side. The number of the downlink component carriers in the active state of the downlink component carrier set; M is the total number of the downlink subframes; or
- ⁇ ⁇ ⁇ , where C Decision is the number of code words on the carrier “When the single code word is transmitted ⁇ is multi-codeword transmission ( ⁇ is 2; N is the downlink component carrier in the downlink component carrier set configured by the network side for the terminal) The number of downlink member carriers in the active state of the downlink component carrier set; ⁇ is 1 on the inactive carrier; M is the total number of the downlink subframes.
- the feedback sequence length position determining unit 71 is configured to:
- the counting information indicates that the downlink subframe in which the downlink data packet scheduled by the downlink scheduling signaling is sent is the downlink subframe in which the downlink data packet scheduling transmission is performed in the feedback window.
- the Q bit in the ACK/NACK sequence is divided into M parts. If the value of the counting information is P, the downlink subframe in which the downlink data packet scheduled by the downlink scheduling signaling is sent is located in the multiple downlink component carriers.
- the ACK/NACK information corresponding to the downlink data packet occupies the first bit position of the Pth part of the M part; when the multi-codeword is transmitted, Determining that the ACK/NACK information corresponding to the downlink data packet occupies the 2*1-1th and 2*1th bit positions of the Pth part of the M part
- the downlink subframe of the downlink data packet scheduled by the downlink scheduling signaling is located on the first carrier of the multiple downlink component carriers, determining the downlink
- the ACK/NACK information corresponding to the data packet occupies the c′′+1 and the ⁇ recreationalbit positions of the P part of the M part, where C Dyna is the number of codewords on the carrier “When the single codeword is transmitted ⁇ 1.
- C Dyna is the number of codewords on the carrier “When the single codeword is transmitted ⁇ 1.
- c is.
- the feedback sequence length position determining unit 71 is configured to:
- the downlink data packet transmission situation information is the total number of downlink data packets scheduled to be transmitted in the feedback window, determine the number of bits Q included in the ACK/NACK sequence that needs to be transmitted in the uplink subframe according to the following formula:
- the feedback sequence length position determining unit 71 is configured to:
- the counting information indicates that the downlink data packet scheduled by the downlink scheduling signaling is the first downlink data packet scheduled to be transmitted in the feedback window
- the downlink data packet scheduled by the downlink scheduling signaling is The first data packet received in the current feedback window determines that the ACK/NACK information corresponding to the downlink data packet occupies the first bit position of the ACK/NACK sequence.
- the beneficial effects of the present invention include:
- the terminal can determine the length of the received feedback information sequence that needs to be sent in the uplink subframe according to the downlink data packet transmission situation information carried in the uplink scheduling signaling. Determining, according to the counting information carried in the downlink scheduling signaling, the location of the ACK/NACK information corresponding to the downlink data packet in the ACK/NACK sequence, thereby generating an ACK/NACK sequence according to the determined length and location information, and transmitting the ACK/NACK sequence to the base station, which can effectively improve The transmission efficiency of the system.
- the method for determining, by the UE in the LTE-A system according to the present invention, the number of bits of the ACK/NACK sequence that needs to be fed back according to the DAI in the UL grant can effectively improve the transmission efficiency of the uplink control signaling in the system, and the method is applicable at the same time.
- the method is applicable at the same time.
- FDD systems and TDD systems The spirit and scope of the Ming.
- the present invention cover the modifications and variations of the inventions
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Abstract
本发明公开了一种调度信令发送及应答反馈方法、系统和设备,涉及无线通信领域,用于提高多载波聚合系统的传输效率。本发明中,基站将计数信息携带在下行调度信令发送给终端,将下行数据包传输情况信息携带在上行调度信令中发送给终端;终端根据下行数据包传输情况信息确定需要在上行子帧中发送的应答/否定应答ACK/NACK序列的长度,根据计数信息确定下行数据包对应的ACK/NACK信息在ACK/NACK序列中的位置;根据确定的长度和位置信息生成ACK/NACK序列,并将该ACK/NACK序列发送给基站。采用本发明,能够提高多载波聚合系统的传输效率。
Description
调度信令发送及应答反馈的方法、 系统和设备 本申请要求在 2010年 4月 06日提交中国专利局、 申请号为 201010141223.1、 发明名称为"基 于多载波 HSUPA的调度信息上报方法、 装置及系统"、 2010年 11月 22日提交中国专利局、 申请号 为 201010555703.2、发明名称为 "基于多载波 HSUPA的调度信息上报方法、装置及系统"、 2011 年 02月 23日提交中国专利局、 申请号为 201110044640.9、 发明名称为 "基于多载波 HSUPA的调 度信息上报方法、装置及系统"以及 2011年 03月 01日提交中国专利局、申请号为 201110049742.x、 发明名称为 "基于多载波 HSUPA的调度信息上报方法、 装置及系统" 的中国专利申请的优先权, 其全部内容通过 I用结合在本申请中。
技术领域
本发明涉及无线通信领域, 尤其涉及一种调度信令发送及应答反馈的方法、 系统和设备。 背景技术
对于长期演进多载波系统,为支持比长期演进( LTE )系统更宽的系统带宽, 比如 100MHz, —种可能是直接分配 100M带宽的频语, 如图 1所示; 一种可能 是将分配给现有的系统一些频谱聚合起来, 凑成大带宽供给长期演进多载波系 统使用, 此时系统中上下行载波可以不对称配置, 即用户可能会占用 个载 波进行下行传输, M≥l个载波进行上行传输, 如图 2所示。 当各个下行载波上 的数据独立进行编译码时, 用户将针对各个载波上的数据包分别进行混合自动 重传请求( HARQ ) (即应答 /否定应答( ACK/NACK )信息)反馈。 因此, 用户 可能在一个上行子帧中同时向基站反馈多个 ACK/NACK信息。
LTE版本 8 ( Rel 8 ) 系统中, 当终端 ( UE )要在同一子帧内同时传输上行 数据和 ACK/NACK反馈信息时, 则 ACK/NACK信息将占用物理上行共享信道 ( PUSCH ) 中的特别资源进行传输。 对于频分双工 (FDD ) 系统, 每次最多可 反馈 2比特信息, 对于时分双工 (TDD ) 系统, 每次最多可反馈 4比特信息。
在 LTE版本 lO ( Rel lO )系统中,可沿用 Rel 8系统中的方法,使用 PUSCH
同时传输上行数据和 ACK/NACK; 也可在同一个子帧内同时传输 PUSCH和物 理上行控制信道(PUCCH ), 此时可重用 Rel 8系统中 PUCCH format 2/2a/2b传 输多比特 ACK/NACK, 同时也会引入新的 PUCCH结构, 以承载大容量的上行 控制信息, 包括信道质量指示 (CQI )、 ACK/NACK等。
长期演进升级 ( LTE-A )系统目前确定最多可支持 5个载波进行聚合。 需要 在同一个子帧内进行 ACK/NACK反馈的多个下行载波及下行子帧 ,在下文中简 称为 "反馈窗口"。 对于 FDD系统, 反馈窗口的大小 L=UE聚合的下行载波数 量 N。 对于 TDD系统, 反馈窗口的大小 L=N X M, 其中 N为 UE聚合的下行载 波数, M对应在同一上行子帧进行反馈的下行子帧数量, 对于不同的上下行配 置及上行子帧, M的取值不同, 即表 1中每一栏 K的数量。
表 1
在实现本发明的过程中, 发明人发现现有技术中存在以下技术问题: 在多载波聚合系统中, 当基站侧动态调度 PUSCH与多比特 ACK/NACK在 同一个上行子帧内传输时, 终端如何确定需要在该上行子帧内发送的 ACK/NACK序列的比特数目还没有具体实现方案, 使得多载波聚合系统的传输 效率受到了影响。
发明内容
本发明实施例提供一种多载波聚合系统中的调度信令发送方法和一种基 站, 用于提高多载波聚合系统中的传输效率。
一种多载波聚合系统中的调度信令发送方法, 该方法包括:
基站需要在当前反馈窗口内调度终端接收下行数据包时, 将计数信息携带 在下行调度信令中, 并将该下行调度信令发送给终端;
基站需要调度终端在当前反馈窗口对应的上行子帧中发送物理上行共享信 道 PUSCH 时, 将当前反馈窗口内的下行数据包传输情况信息携带在上行调度 信令中, 并将该上行调度信令发送给终端;
所述计数信息是终端用于确定所述下行调度信令所调度的下行数据包对应 的应答 /否定应答 ACK/NACK信息在所述上行子帧中发送的 ACK/NACK序列中 位置的信息; 所述下行数据包传输情况信息是用于终端确定所述 ACK/NACK 序列的长度的信息; 所述当前反馈窗口包括终端支持的多个下行成员载波上需 一种基站, 该基站包括:
下行调度信令发送单元, 用于需要在当前反馈窗口内调度终端接收下行数 据包时, 将计数信息携带在下行调度信令中, 并将该下行调度信令发送给终 端;
上行调度信令发送单元, 用于需要调度终端在当前反馈窗口对应的上行子 帧中发送物理上行共享信道 PUSCH 时, 将当前反馈窗口内的下行数据包传输 情况信息携带在上行调度信令中, 并将该上行调度信令发送给终端;
所述计数信息是终端用于确定所述下行调度信令所调度的下行数据包对应 的应答 /否定应答 ACK/NACK信息在所述上行子帧中发送的 ACK/NACK序列中 位置的信息; 所述下行数据包传输情况信息是用于终端确定所述 ACK/NACK 序列的长度的信息; 所述当前反馈窗口包括终端支持的多个下行成员载波上需
本方案中, 基站将计数信息携带在下行调度信令发送给终端, 将下行数据 包传输情况信息携带在上行调度信令中发送给终端。 可见, 釆用本方案多载波 聚合系统中的终端能够获得用于确定需要发送的 ACK/NACK序列长度和下行 数据包对应的 ACK/NACK信息在 ACK/NACK序列中的位置的信息。
本发明实施例还提供一种多载波聚合系统中的应答反馈方法、 一种终端和 一种 LTE-A通信系统, 用于提高多载波聚合系统的传输效率。
一种多载波聚合系统中的应答反馈方法, 该方法包括:
终端接收基站在当前反馈窗口内发来的调度本终端接收下行数据包的下行 调度信令, 以及基站发来的调度本终端在当前反馈窗口对应的上行子帧中发送 物理上行共享信道 PUSCH 的上行调度信令; 所述下行调度信令中携带计数信 息, 所述上行调度信令中携带所述当前反馈窗口内的下行数据包传输情况信 息;
终端根据所述下行数据包传输情况信息确定需要在所述上行子帧中发送的 应答 /否定应答 ACK/NACK序列的长度, 根据所述计数信息确定所述下行调度 信令所调度的下行数据包对应的 ACK/NACK信息在所述 ACK/NACK序列中的 位置;
终端根据确定的长度和位置信息生成 ACK/NACK 序列, 并将该 ACK/NACK序列发送给基站。
一种终端, 该终端包括:
调度信令接收单元, 用于接收基站在当前反馈窗口内发来的调度本终端接 收下行数据包的下行调度信令, 以及基站发来的调度本终端在当前反馈窗口对 应的上行子帧中发送物理上行共享信道 PUSCH 的上行调度信令; 所述下行调 度信令中携带计数信息, 所述上行调度信令中携带所述当前反馈窗口内的下行 数据包传输情况信息;
反馈序列长度位置确定单元, 用于根据所述下行数据包传输情况信息确定
需要在所述上行子帧中发送的应答 /否定应答 ACK/NACK序列的长度, 根据所 述计数信息确定所述下行调度信令所调度的下行数据包对应的 ACK/NACK信 息在所述 ACK/NACK序列中的位置;
反馈序列发送单元, 用于根据所述反馈序列长度位置确定单元确定的长度 和位置信息生成 ACK/NACK序列, 并将该 ACK/NACK序列发送给基站。
一种长期演进升级 LTE-A通信系统, 该系统包括:
基站, 用于需要在当前反馈窗口内调度终端接收下行数据包时, 将计数信 息携带在下行调度信令中, 并将该下行调度信令发送给终端; 需要调度终端在 当前反馈窗口对应的上行子帧中发送物理上行共享信道 PUSCH 时, 将当前反 馈窗口内的下行数据包传输情况信息携带在上行调度信令中, 并将该上行调度 信令发送给终端; 所述当前反馈窗口包括终端支持的多个下行成员载波上需要 终端, 用于接收所述上行调度信令和下行调度信令, 根据所述下行数据包 传输情况信息确定需要在所述上行子帧中发送的应答 /否定应答 ACK/NACK序 列的长度, 根据所述计数信息确定所述下行调度信令所调度的下行数据包对应 的 ACK/NACK信息在所述 ACK/NACK序列中的位置; 根据确定的长度和位置 信息生成 ACK/NACK序列, 并将该 ACK/NACK序列发送给基站。
本方案中, 终端能够根据上行调度信令中携带的下行数据包传输情况信息 确定需要在上行子帧中发送的接收反馈信息序列的长度, 根据下行调度信令中 携带的计数信息确定下行数据包对应的 ACK/NACK信息在 ACK/NACK序列中 的位置, 从而根据确定的长度和位置信息生成 ACK/NACK序列并发送给基站, 能够有效提高系统的传输效率。 附图说明
图 1为现有技术中的单频谱系统示意图;
图 2为现有技术中的频谱聚合系统示意图;
图 3为本发明实施例提供的方法流程示意图;
图 4A为本发明实施例一中的 PDSCH调度示意图;
图 4B为本发明实施例一中的 ACK/NACK序列对应示意图;
图 4C为本发明实施例一中的另一 ACK/NACK序列对应示意图; 图 4D为本发明实施例二中的 ACK/NACK序列对应示意图;
图 4E为本发明实施例二中的另一 ACK/NACK序列对应示意图;
图 4F为本发明实施例三中的另一 ACK/NACK序列对应示意图;
图 5为本发明实施例提供的系统结构示意图;
图 6为本发明实施例提供的基站结构示意图;
图 7为本发明实施例提供的终端结构示意图。 具体实施方式
为了使得多载波聚合系统中的 UE在同一上行子帧发送多个下行载波上的 数据包对应的 ACK/NACK信息时, 能够确定承载这些 ACK/NACK信息的 ACK/NACK序列的长度和各数据包对应的 ACK/NACK信息在 ACK/NACK序列 中的位置, 从而提高系统的传输效率, 本发明实施例提供一种多载波聚合系统 中的调度信令的发送及应答反馈方法, 本方法中, 终端根据上行调度信令中的 下行数据包传输情况信息确定需要在上行子帧中发送的 ACK/NACK序列的长 度, 根据下行调度信令中的计数信息确定下行数据包对应的 ACK/NACK信息 在 ACK/NACK序列中的位置。
参见图 3 , 本发明实施例提供的多载波聚合系统中的上行调度信令的发送 及接收反馈方法, 具体包括以下步骤:
步骤 30 : 基站需要调度终端在当前反馈窗口对应的上行子帧中发送 PUSCH时, 确定当前反馈窗口内的下行数据包传输情况; 当前反馈窗口包括终 端支持的多个下行成员载波上需要在所述上行子帧中发送数据包接收反馈信息 的下行子帧;
这里, 当前反馈窗口内的下行数据包传输情况是指当前反馈窗口所包含下 行传输资源上的下行数据包传输情况, 当前反馈窗口内所包含的下行传输资源 由终端支持的多个下行成员载波上需要在所述上行子帧中发送数据包接收反馈 信息的下行子帧构成。 需要在上行子帧中发送数据包接收反馈信息的下行子 帧, 是指终端需要在该上行子帧中发送在该下行子帧中接收到的下行数据包的 接收反馈信息。 需要在某个上行子帧中发送在哪些下行子帧中接收到的下行数 据包的接收反馈信息, 可以根据表 1确定。
对于 FDD和 TDD系统, 反馈窗口内的下行成员载波为配置的下行成员载 波集合中的多个下行成员载波或下行成员载波集合中处于激活状态的下行成员 载波。
当前反馈窗口对应的上行子帧是指当前反馈窗口所包含的下行子帧对应的 上行子帧, 该对应关系已经进行了预先设定。
如果基站在一个下行子帧中向所述终端发送多个上行调度信令, 则携带在 每个上行调度信令中的所述下行数据包传输情况信息的取值是相同的。
步骤 31 : 基站将确定的当前反馈窗口内下行数据包传输情况的信息携带在 上行调度信令( UL grant ) 中, 并将该上行调度信令发送给终端;
步骤 32: 终端接收所述上行调度信令, 根据所述下行数据包传输情况信息 确定需要在所述上行子帧中发送的接收反馈信息序列的长度;
步骤 33: 终端向基站发送具有所述长度的接收反馈信息序列。
在基站侧:
步骤 30中, 基站确定当前反馈窗口内的下行数据包传输情况, 其具体实现 可以釆用如下两种:
第一种, 基站确定当前反馈窗口内进行了下行数据包调度传输的下行子帧 的总数目, 将该下行子帧的总数目信息作为定当前反馈窗口内的下行数据包传 输情况信息。
第二种, 基站确定当前反馈窗口内调度传输的下行数据包的总数目, 将该
下行数据包的总数目信息作为定当前反馈窗口内的下行数据包传输情况信息。 较佳的, 在上述第一种方式时, 为了使得终端能够确定当前反馈窗口内发 送的各下行数据包对应的接收反馈信息在接收反馈信息序列中的位置, 基站还 可以在需要在当前反馈窗口内调度终端接收下行数据包时, 向终端发送携带计 数信息的下行调度信令(DL grant ) , 该计数信息表示发送该下行数据包的下行 子帧是当前反馈窗口内进行下行数据包调度传输的第几个下行子帧。
下行调度信令的发送可以在上行调度信令的发送之前或与所述上行调度信 令在同一子帧中发送。
同样的, 在上述第二种方式时, 为了使得终端能够确定当前反馈窗口内发 送的各下行数据包对应的接收反馈信息在接收反馈信息序列中的位置, 基站还 可以在需要在当前反馈窗口内调度终端接收下行数据包时, 向终端发送携带计 数信息的下行调度信令, 该计数信息表示该下行调度信令所调度的下行数据包 是所述反馈窗口内调度传输的第几个下行数据包。
下行调度信令的发送可以在上行调度信令的发送之前或与所述上行调度信 令在同一子帧中发送。
上述计数信息可以携带在下行调度信令的 DAI域中。 相应的, 终端在从下 行调度信令的 DAI域获取计数信息。
步骤 31中, 基站可以将确定的当前反馈窗口内下行数据包传输情况的信息 携带在上行调度信令的下行分配标识( Downlink Assignment Index, DAI )域中。 相应的, 终端在从上行调度信令的 DAI域获取反馈窗口内的下行数据包传输情 况信息。
如果基站在一个下行子帧中向所述终端发送多个上行调度信令, 则每个上 行调度信令中的 DAI域的取值是相同的。
在终端侧:
步骤 32中, 若上行调度信令中携带的下行数据包传输情况信息为反馈窗口 内进行了下行数据包调度传输的下行子帧的总数目, 则终端根据该下行数据包
传输情况信息确定需要在所述上行子帧中发送的接收反馈信息序列的长度, 其 具体实现可以如下:
终端按照如下公式确定需要在所述上行子帧中发送的应答 /否定应答
( ACK/NACK )序列包含的比特数目 Q:
Q=C*N*M, 其中 C为码字数, 单码字传输时 C为 1 , 多码字传输时 C为 2; N为网络侧为终端配置的下行成员载波集合中下行成员载波的个数或该下行 成员载波集合中处于激活状态的下行成员载波的个数; M为所述下行子帧的总 数目; 或, = ^ Μ , 其中 C„为载波《上的码字数, 单码字传输时 ^ 为 多码字传 输时 (^为 2; N 为网络侧为终端配置的下行成员载波集合中下行成员载波的个 数或该下行成员载波集合中处于激活状态的下行成员载波的个数; 未激活载波 上 ^ 为 1 ; M为所述下行子帧的总数目。
相应的, 步骤 33中, 终端向基站发送具有所述长度的接收反馈信息序列, 其具体实现可以如下:
终端接收反馈窗口内的下行子帧发来的下行调度信令, 该下行调度信令中 携带计数信息, 该计数信息表示该下行子帧是所述反馈窗口内进行下行数据包 调度传输的第几个下行子帧; 终端可以在终端接收上行调度信令之前或在发送 上行调度信令的下行子帧中接收下行调度信令。 终端根据接收到的各下行调度 信令中的计数信息, 确定各下行调度信令所调度的下行数据包对应的 ACK/NACK信息在 ACK/NACK序列中的比特位置。 终端根据确定的比特位置 以及各下行调度信令所调度的下行数据包的接收情况, 生成比特数目为 Q 的 ACK/NACK序列, 并将该 ACK/NACK序列发送给基站。
具体的, 将 ACK/NACK序列中的 Q比特分为 M部分; 若所述计数信息的 取值为 P, 发送所述下行调度信令所调度的下行数据包的下行子帧位于所述多 个下行成员载波中的第 I个载波上, 当单码字传输时,则确定该下行数据包对应
的 ACK/NACK信息占用所述 M部分中第 P部分的第 I个比特位置; 当多码字 传输时, 则确定该下行数据包对应的 ACK/NACK信息占用所述 M部分中第 P 部分的第 2*1-1和第 2*1个比特位置。
例如, 如图 4A和图 4B, 反馈窗口内进行了下行数据包调度传输的下行子 帧的总数目为 2, 终端据此确定的 ACK/NACK序列的比特数目为 6, 在反馈窗 口内的下行载波 1 的第一个下行子帧上接收到的下行调度信令中携带的计数信 息值为 1 , 在反馈窗口内的下行载波 2的第一个下行子帧上接收到的下行调度信 令中携带的计数信息值为 1 , 在反馈窗口内的下行载波 2的第三个下行子帧上接 收到的下行调度信令中携带的计数信息值为 2 , 则需要发送的 6 比特 ACK/NACK序列 {b0, bl , ... ... , b5}中, bO 用于承载在反馈窗口内的下行载 波 1 的第一个下行子帧上接收到的下行调度信令所调度的下行数据包对应的接 收反馈信息, 若终端正确接收该下行数据包, 则 bO可设置为表示 ACK的 0, 若 终端未正确接收该下行数据包, 则 bO可设置为表示 NACK的 1 ; bl用于承载在 反馈窗口内的下行载波 2 的第一个下行子帧上接收到的下行调度信令所调度的 下行数据包对应的接收反馈信息, 若终端正确接收该下行数据包, 则 bl可设置 为表示 ACK的 0, 若终端未正确接收该下行数据包, 则 bl可设置为表示 NACK 的 1 ; 由于未在反馈窗口内的下行载波 3 的第一个下行子帧上接收到下行数据 包, 则 b2设置为表示 NACK的 1 ; 由于未在反馈窗口内的下行载波 1的第三个 下行子帧上接收到下行数据包, 则 b3设置为表示 NACK的 1 ; b4用于承载在反 馈窗口内的下行载波 2 的第三个下行子帧上接收到的下行调度信令所调度的下 行数据包对应的接收反馈信息, 若终端正确接收该下行数据包, 则 b4可设置为 表示 ACK的 0, 若终端未正确接收该下行数据包, 则 b4可设置为表示 NACK 的 1 ; 由于未在反馈窗口内的下行载波 3 的第三个下行子帧上接收到下行数据 包, 则 b5设置为表示 NACK的 1。
或,若所述计数信息的取值为 P, 发送所述下行调度信令所调度的下行数据 包的下行子帧位于所述多个下行成员载波中的第 I个载波上, 则确定该下行数
据包对应的 ACK/NACK信息占用所述 M部分中第 P部分的第 c„+l和第; ^ „个 比特位置, 其中 C„为载波《上的码字数, 单码字传输时 ^ 为 1 , 多码字传输时 c "为。
步骤 32中, 若上行调度信令中携带的下行数据包传输情况信息为反馈窗口 内调度传输的下行数据包的总数目, 则终端根据该下行数据包传输情况信息确 定需要在所述上行子帧中发送的接收反馈信息序列的长度, 其具体实现可以如 下:
终端按照如下公式确定需要在所述上行子帧中发送的 ACK/NACK序列包 含的比特数目 Q:
Q=C*M, 其中 C为码字数, 单码字传输时 C为 1 , 多码字传输时 C为 2;
M为所述下行数据包的总数目。
相应的, 步骤 33中, 终端向基站发送具有所述长度的接收反馈信息序列, 其具体实现可以如下:
终端接收所述反馈窗口内的下行子帧发来的下行调度信令, 该下行调度信 令中携带计数信息, 该计数信息表示该下行调度信令所调度的下行数据包是所 述反馈窗口内调度传输的第几个下行数据包; 终端可以在终端接收上行调度信 令之前或在发送上行调度信令的下行子帧中接收下行调度信令。 终端根据接收 到的各下行调度信令中的计数信息, 确定各下行调度信令所调度的下行数据包 对应的 ACK/NAC信息在 ACK/NACK序列中的比特位置。 终端根据确定的比特 位置以及所述各下行调度信令所调度的下行数据包的接收情况, 生成比特数目 为 Q的 ACK/NACK序列, 并将该 ACK/NACK序列发送给基站。
具体的, 若所述下行调度信令所调度的下行数据包是在当前反馈窗口内接 收到的第 I个数据包, 则确定该下行数据包对应的 ACK/NACK信息占用所述 ACK/NACK序列的第 I个比特位置。
例如, 例如, 如图 4A和图 4D, 反馈窗口内调度传输的下行数据包的总数
目为 3 , 终端据此确定的 ACK/NACK序列的比特数目为 3 , 在反馈窗口内的下 行载波 1的第一个下行子帧上接收到的下行调度信令中携带的计数信息值为 1 , 在反馈窗口内的下行载波 2 的第一个下行子帧上接收到的下行调度信令中携带 的计数信息值为 2, 在反馈窗口内的下行载波 2的第三个下行子帧上接收到的下 行调度信令中携带的计数信息值为 3 , 则需要发送的 3 比特 ACK/NACK序列 {bO, bl , b2}中, bO用于承载在反馈窗口内的下行载波 1的第一个下行子帧上 接收到的下行调度信令所调度的下行数据包对应的接收反馈信息, 若终端正确 接收该下行数据包, 则 bO可设置为表示 ACK的 0, 若终端未正确接收该下行数 据包, 则 bO可设置为表示 NACK的 1 ; bl用于承载在反馈窗口内的下行载波 2 的第一个下行子帧上接收到的下行调度信令所调度的下行数据包对应的接收反 馈信息, 若终端正确接收该下行数据包, 则 bl可设置为表示 ACK的 0, 若终端 未正确接收该下行数据包, 则 bl可设置为表示 NACK的 1 ; b2用于承载在反馈 窗口内的下行载波 2 的第三个下行子帧上接收到的下行调度信令所调度的下行 数据包对应的接收反馈信息, 若终端正确接收该下行数据包, 则 b2可设置为表 示 ACK的 0, 若终端未正确接收该下行数据包, 则 b2可设置为表示 NACK的 1。
下面以具体实施例对本发明进行说明:
进行多比特 ACK/NACK复用反馈时, 对于有 UL grant调度的上行子帧, 方法一: UL grant中使用 DAI指示反馈窗口内有数据包调度传输的下行子 帧数目 M, 可重用 R8 TDD UL grant中的 2比特 DAI, 图 4A所示的实例中 M=2。 UE将在对应的上行子帧中反馈 C X N X M比特的 ACK/NACK信息, 其 中 C为码字数(单码字传输时 C=l , 多码字传输时 C=2 ) , N为配置的下行载 波集合中的载波数量或激活的载波数量。 其中无数据传输的时频资源对应反馈 NACK。
DL grant中的 DAI则作为计数器, 表示当前调度数据包传输的子帧是反馈
传输内第几个调度该 UE数据传输的子帧, 如对于图 4A中 PDSCH1和 PDSCH2 所对应的 DL grant中 DAI=1 , PDSCH3所对应的 DL grant中 DAI=2。
实施例一:
若 UE进行单码字传输, 其配置的下行载波集合为 {下行载波 1 , 下行载波 2, 下行载波 3} , 其中激活的载波为下行载波 1和下行载波 2。
若 N 为配置的下行载波集合中的载波数量, 则 UE 要反馈 6 比特 ACK/NACK信息 {b0, bl , ... ... , b5}, 其中 b2、 b3、 b5为 NACK, 如图 4B所 示。
若 N 为配置的下行载波集合中的激活载波数量, 则 UE要反馈 4 比特 ACK/NACK信息 {b0, bl , b2, b3}, 其中 b2为 NACK, 如图 4C所示。
方法二: UL grant中使用 DAI指示反馈窗口内调度传输的数据包总数 M, 可用 5比特 DAI进行指示, 图 4A所示的实例中 M=3。 UE将在对应的上行子帧 中反馈 C x M比特的 ACK/NACK信息, 其中 C为码字数(单码字传输时 C=l , 多码字传输时 C=2 ) 。
DL grant中的 DAI则作为计数器, 表示当前调度数据包是反馈传输内属于 该 UE 的第几个数据包, 其记数顺序按照先频域后时域的顺序进行, 如对于图 4A中 PDSCH1所对应的 DL grant中 DAI=1 , PDSCH2所对应的 DL grant中 DAI=2, PDSCH3所对应的 DL grant中 DAI=3。 UE按照 DL grant中的 DAI可 确定对应数据包的 ACK/NACK信息在反馈信息序列中所占的位置。 若发现有 数据包丟失, 则反馈 NACK。
实施例二:
若 UE进行单码字传输, UL grant中的 DAI=3 , 则 UE向基站反馈 3比特 ACK/NACK信息 {b0, bl , b2}, 如图 4D所示。
方法三: UL grant中使用 DAI指示反馈窗口内有数据包调度传输的下行子 帧数目 M, 可重用 R8 TDD UL grant中的 2比特 DAI, 图 4E所示的实例中
M=2。 11£ 将在对应的上行子帧中反馈2 = |^„. , 其中 C„为载波《上的码字 数, 单码字传输时 <^为 1 , 多码字传输时 <^为2; N为网络侧为终端配置的下行 成员载波集合中下行成员载波的个数或激活的载波数量; 未激活载波上 为 1 ; 其中无数据传输的资源对应反馈 NACK。
DL grant中的 DAI则作为计数器, 表示当前调度数据包传输的子帧是反馈 传输内第几个调度该 UE数据传输的子帧, 如对于图 4A中 PDSCH1和 PDSCH2 所对应的 DL grant中 DAI=1 , PDSCH3所对应的 DL grant中 DAI=2。
实施例三:
若 UE配置的下行载波集合为{下行载波 1 , 下行载波 2 , 下行载波 3} , 其 中激活的载波为下行载波 1和下行载波 2 , 且下行载波 1上为单码字传输, 下行 载波 2上为多码字传输。
若 N 为配置的下行载波集合中的载波数量, 则 UE 要反馈 8 比特 ACK/NACK信息 {b0 , bl , ... ... , b7}, 其中 b3、 b4、 b7为 NACK, 如图 4E所 示。
若 N 为配置的下行载波集合中的激活载波数量, 则 UE要反馈 6 比特 ACK/NACK信息 {b0 , bl , ... ... , b5}, 其中 b3为 NACK, 如图 4F所示。
对于上述三种方法, 由于基站端确切知道哪些资源上无数据调度, 即可知 道反馈序列中哪些位置上对应的反馈信息为 NACK, 因此在接收、 解调 UE的 反馈信息时, 可以将对应的信息作为已知信息进行译码, 从而可降低实际的编 码速率, 提高反馈信息的可靠性。
参见图 5 , 本发明实施例还提供一种 LTE-A通信系统, 该系统包括: 基站 50 , 用于需要在当前反馈窗口内调度终端接收下行数据包时, 将计数 信息携带在下行调度信令中, 并将该下行调度信令发送给终端; 需要调度终端 在当前反馈窗口对应的上行子帧中发送物理上行共享信道 PUSCH 时, 将当前 反馈窗口内的下行数据包传输情况信息携带在上行调度信令中, 并将该上行调
度信令发送给终端; 所述当前反馈窗口包括终端支持的多个下行成员载波上需 终端 51 , 用于接收所述上行调度信令和下行调度信令, 根据所述下行数据 包传输情况信息确定需要在所述上行子帧中发送的应答 /否定应答 ACK/NACK 序列的长度, 根据所述计数信息确定所述下行调度信令所调度的下行数据包对 应的 ACK/NACK信息在所述 ACK/NACK序列中的位置; 根据确定的长度和位 置信息生成 ACK/NACK序列, 并将该 ACK/NACK序列发送给基站。
所述基站 50用于:
将当前反馈窗口内进行了下行数据包调度传输的下行子帧的总数目携带在 上行调度信令中, 并将该上行调度信令发送给终端;
所述终端 51用于:
按照如下公式确定需要在所述上行子帧中发送的 ACK/NACK序列包含的 比特数目 Q:
Q=C*N*M, 其中 C为码字数, 单码字传输时 C为 1 , 多码字传输时 C为 2; N为网络侧为终端配置的下行成员载波集合中下行成员载波的个数或该下行 成员载波集合中处于激活状态的下行成员载波的个数; M为所述下行子帧的总 数目; 或,
= ^ Μ , 其中 C„为载波《上的码字数, 单码字传输时 ^ 为 多码字传 输时 (^为 2; N 为网络侧为终端配置的下行成员载波集合中下行成员载波的个 数或该下行成员载波集合中处于激活状态的下行成员载波的个数; 未激活载波 上 ^ 为 1 ; M为所述下行子帧的总数目。
所述基站 50用于:
将表示发送所述下行调度信令所调度的下行数据包的下行子帧是所述反馈 窗口内进行下行数据包调度传输的第几个下行子帧的计数信息携带在所述下行 调度信令中, 并将该下行调度信令发送给终端;
所述终端 51用于:
将所述 ACK/NACK序列中的 Q比特分为 M部分;
若所述计数信息的取值为 P, 发送所述下行调度信令所调度的下行数据包 的下行子帧位于所述多个下行成员载波中的第 I个载波上, 当单码字传输时,则 确定该下行数据包对应的 ACK/NACK信息占用所述 M部分中第 P部分的第 I 个比特位置; 当多码字传输时, 则确定该下行数据包对应的 ACK/NACK信息占 用所述 M部分中第 P部分的第 2*1-1和第 2*1个比特位置。
或,若所述计数信息的取值为 P, 发送所述下行调度信令所调度的下行数据 包的下行子帧位于所述多个下行成员载波中的第 I个载波上, 则确定该下行数 据包对应的 ACK/NACK信息占用所述 M部分中第 P部分的第 c„+l和第; ^ „个 比特位置, 其中 C„为载波《上的码字数, 单码字传输时 ^ 为 1 , 多码字传输时 c "为。
所述基站 50用于:
将当前反馈窗口内调度传输的下行数据包的总数目携带在上行调度信令 中, 并将该上行调度信令发送给终端;
所述终端 51用于:
按照如下公式确定需要在所述上行子帧中发送的 ACK/NACK序列包含的 比特数目 Q, 并向基站发送比特数目为 Q的 ACK/NACK序列:
Q=C*M, 其中 C为码字数, 单码字传输时 C为 1 , 多码字传输时 C为 2; M为所述下行数据包的总数目。
所述基站 50用于:
将表示所述下行调度信令所调度的下行数据包是所述反馈窗口内调度传输 的第几个下行数据包的计数信息携带在所述下行调度信令中, 并将该下行调度 信令发送给终端;
所述终端 51用于:
若所述下行调度信令所调度的下行数据包是在当前反馈窗口内接收到的第
I个数据包, 则确定该下行数据包对应的 ACK/NACK信息占用所述 ACK/NACK 序列的第 I个比特位置。
所述基站 50用于:
在一个下行子帧中向所述终端发送多个上行调度信令时, 携带在每个上行 调度信令中的下行数据包传输情况信息的取值是相同的。
参见图 6, 本发明实施例还提供一种基站, 可以应用于上述 LTE-A通信系 统中, 该基站包括:
下行调度信令发送单元 60, 用于需要在当前反馈窗口内调度终端接收下行 数据包时, 将计数信息携带在下行调度信令中, 并将该下行调度信令发送给终 端;
上行调度信令发送单元 61 , 用于需要调度终端在当前反馈窗口对应的上行 子帧中发送物理上行共享信道 PUSCH 时, 将当前反馈窗口内的下行数据包传 输情况信息携带在上行调度信令中, 并将该上行调度信令发送给终端;
所述计数信息是终端用于确定所述下行调度信令所调度的下行数据包对应 的应答 /否定应答 ACK/NACK信息在所述上行子帧中发送的 ACK/NACK序列中 位置的信息; 所述下行数据包传输情况信息是用于终端确定所述 ACK/NACK 序列的长度的信息; 所述当前反馈窗口包括终端支持的多个下行成员载波上需 所述上行调度信令发送单元 61用于:
将当前反馈窗口内进行了下行数据包调度传输的下行子帧的总数目或者当 前反馈窗口内调度传输的下行数据包的总数目携带在上行调度信令中, 并将该 上行调度信令发送给终端。
所述上行调度信令发送单元 61用于:
在一个下行子帧中向所述终端发送多个上行调度信令时, 携带在每个上行 调度信令中的下行数据包传输情况信息的取值是相同的。
所述下行调度信令发送单元 60用于:
在所述上行调度信令发送单元将当前反馈窗口内进行了下行数据包调度传 输的下行子帧的总数目携带在上行调度信令中时, 将表示发送所述下行调度信 令所调度的下行数据包的下行子帧是所述反馈窗口内进行下行数据包调度传输 的第几个下行子帧的计数信息携带在下行调度信令中, 并将该下行调度信令发 送给终端。
所述下行调度信令发送单元 60用于:
在所述上行调度信令发送单元将当前反馈窗口内调度传输的下行数据包的 总数目携带在上行调度信令中时, 将表示所述下行调度信令所调度的下行数据 包是所述反馈窗口内调度传输的第几个下行数据包的计数信息携带在下行调度 信令中, 并将该下行调度信令发送给终端。
所述上行调度信令发送单元 61用于:
将确定的当前反馈窗口内的下行数据包传输情况信息携带在上行调度信令 的下行分配标识 DAI域中;
所述上行调度信令发送单元 61用于:
在一个下行子帧中向所述终端发送多个上行调度信令时, 每个上行调度信 令中的 DAI域的取值是相同的。
所述下行调度信令发送单元 60用于:
将所述计数信息携带在所述下行调度信令的 DAI域中。
所述终端支持的多个下行成员载波为:
网络侧为终端配置的下行成员载波集合中的多个下行成员载波; 或者, 网络侧为终端配置的下行成员载波集合中处于激活状态的多个下行成员载 波。
参见图 7 , 本发明实施例还提供一种终端, 可以应用于上述 LTE-A通信系 统中, 该终端包括:
调度信令接收单元 70, 用于接收基站在当前反馈窗口内发来的调度本终端
接收下行数据包的下行调度信令, 以及基站发来到调度本终端在当前反馈窗口 对应的上行子帧中发送物理上行共享信道 PUSCH 的上行调度信令; 所述下行 调度信令中携带计数信息, 所述上行调度信令中携带所述当前反馈窗口内的下 行数据包传输情况信息;
反馈序列长度位置确定单元 71 , 用于根据所述下行数据包传输情况信息确 定需要在所述上行子帧中发送的应答 /否定应答 ACK/NACK序列的长度, 根据 所述计数信息确定所述下行调度信令所调度的下行数据包对应的 ACK/NACK 信息在所述 ACK/NACK序列中的位置;
反馈序列发送单元 72, 用于根据所述反馈序列长度位置确定单元确定的长 度和位置信息生成 ACK/NACK序列, 并将该 ACK/NACK序列发送给基站。
所述反馈序列长度位置确定单元 71用于:
在所述下行数据包传输情况信息为所述反馈窗口内进行了下行数据包调度 传输的下行子帧的总数目时, 按照如下公式确定需要在所述上行子帧中发送的
Q=C*N*M, 其中 C为码字数, 单码字传输时 C为 1 , 多码字传输时 C为 2; N为网络侧为终端配置的下行成员载波集合中下行成员载波的个数或该下行 成员载波集合中处于激活状态的下行成员载波的个数; M为所述下行子帧的总 数目; 或,
= ^ Μ , 其中 C„为载波《上的码字数, 单码字传输时 ^ 为 多码字传 输时 (^为 2; N 为网络侧为终端配置的下行成员载波集合中下行成员载波的个 数或该下行成员载波集合中处于激活状态的下行成员载波的个数; 未激活载波 上 ^ 为 1 ; M为所述下行子帧的总数目。
所述反馈序列长度位置确定单元 71用于:
在所述计数信息表示发送所述下行调度信令所调度的下行数据包的下行子 帧是所述反馈窗口内进行下行数据包调度传输的第几个下行子帧时, 将所述
ACK/NACK序列中的 Q比特分为 M部分; 若所述计数信息的取值为 P, 发送所 述下行调度信令所调度的下行数据包的下行子帧位于所述多个下行成员载波中 的第 I个载波上, 当单码字传输时, 则确定该下行数据包对应的 ACK/NACK信 息占用所述 M部分中第 P部分的第 I个比特位置; 当多码字传输时, 则确定该 下行数据包对应的 ACK/NACK信息占用所述 M部分中第 P部分的第 2*1-1和第 2*1个比特位置
或,若所述计数信息的取值为 P, 发送所述下行调度信令所调度的下行数据 包的下行子帧位于所述多个下行成员载波中的第 I个载波上, 则确定该下行数 据包对应的 ACK/NACK信息占用所述 M部分中第 P部分的第 c„+l和第; ^ „个 比特位置, 其中 C„为载波《上的码字数, 单码字传输时 ^ 为 1 , 多码字传输时 c "为。
所述反馈序列长度位置确定单元 71用于:
在所述下行数据包传输情况信息为所述反馈窗口内调度传输的下行数据包 的总数目时, 按照如下公式确定需要在所述上行子帧中发送的 ACK/NACK序 列包含的比特数目 Q :
Q=C*M, 其中 C为码字数, 单码字传输时 C为 1 , 多码字传输时 C为 2; M为所述下行数据包的总数目。
所述反馈序列长度位置确定单元 71用于:
在所述计数信息表示所述下行调度信令所调度的下行数据包是所述反馈窗 口内调度传输的第几个下行数据包时, 若所述下行调度信令所调度的下行数据 包是在当前反馈窗口内接收到的第 I 个数据包, 则确定该下行数据包对应的 ACK/NACK信息占用所述 ACK/NACK序列的第 I个比特位置。
综上, 本发明的有益效果包括:
本发明实施例提供的方案中, 终端能够根据上行调度信令中携带的下行数 据包传输情况信息确定需要在上行子帧中发送的接收反馈信息序列的长度, 根
据下行调度信令中携带的计数信息确定下行数据包对应的 ACK/NACK信息在 ACK/NACK序列中的位置, 从而根据确定的长度和位置信息生成 ACK/NACK 序列并发送给基站, 能够有效提高系统的传输效率。
使用本发明给出的 LTE-A系统中 UE根据 UL grant中的 DAI确定实际需要 反馈的 ACK/NACK序列的比特数目的方法, 可有效提高系统中上行控制信令 的传输效率 , 该方法同时适用于 FDD系统和 TDD系统。 明的精神和范围。 这样, 倘若本发明的这些修改和变型属于本发明权利要求及 其等同技术的范围之内, 则本发明也意图包含这些改动和变型在内。
Claims
1、 一种多载波聚合系统中的调度信令发送方法, 其特征在于, 该方法包 括:
基站需要在当前反馈窗口内调度终端接收下行数据包时, 将计数信息携带 在下行调度信令中, 并将该下行调度信令发送给终端;
基站需要调度终端在当前反馈窗口对应的上行子帧中发送物理上行共享信 道 PUSCH 时, 将当前反馈窗口内的下行数据包传输情况信息携带在上行调度 信令中, 并将该上行调度信令发送给终端;
所述计数信息是终端用于确定所述下行调度信令所调度的下行数据包对应 的应答 /否定应答 ACK/NACK信息在所述上行子帧中发送的 ACK/NACK序列中 位置的信息; 所述下行数据包传输情况信息是用于终端确定所述 ACK/NACK 序列的长度的信息; 所述当前反馈窗口包括终端支持的多个下行成员载波上需
2、 如权利要求 1所述的方法, 其特征在于, 所述当前反馈窗口内的下行数 据包传输情况信息为:
当前反馈窗口内进行了下行数据包调度传输的下行子帧的总数目; 或者, 当前反馈窗口内调度传输的下行数据包的总数目。
3、 如权利要求 1所述的方法, 其特征在于, 基站在一个下行子帧中向所述 终端发送多个上行调度信令时, 携带在每个上行调度信令中的下行数据包传输 情况信息的取值是相同的。
4、 如权利要求 2所述的方法, 其特征在于, 在所述当前反馈窗口内的下行 数据包传输情况信息为所述下行子帧的总数目时, 所述计数信息表示: 发送所 述下行调度信令所调度的下行数据包的下行子帧是所述反馈窗口内进行下行数 据包调度传输的第几个下行子帧。
5、 如权利要求 2所述的方法, 其特征在于, 在所述当前反馈窗口内的下行 数据包传输情况信息为所述下行数据包的总数目时, 所述计数信息表示: 所述 下行调度信令所调度的下行数据包是所述反馈窗口内调度传输的第几个下行数 据包。
6、 如权利要求 1-5中任一所述的方法, 其特征在于, 基站将所述当前反馈 窗口内的下行数据包传输情况信息携带在所述上行调度信令的下行分配标识 DAI域中;
基站将所述计数信息携带在所述下行调度信令的 DAI域中。
7、 如权利要求 6所述的方法, 其特征在于, 基站在一个下行子帧中向所述 终端发送多个上行调度信令时,每个上行调度信令中的 DAI域的取值是相同的。
8、 如权利要求 1-5中任一所述的方法, 其特征在于, 所述终端支持的多个 下行成员载波为:
网络侧为终端配置的下行成员载波集合中的多个下行成员载波; 或者, 网络侧为终端配置的下行成员载波集合中处于激活状态的多个下行成员载 波。
9、 一种多载波聚合系统中的应答反馈方法, 其特征在于, 该方法包括: 终端接收基站在当前反馈窗口内发来的调度本终端接收下行数据包的下行 调度信令, 以及基站发来的调度本终端在当前反馈窗口所对应的上行子帧中发 送物理上行共享信道 PUSCH 的上行调度信令; 所述下行调度信令中携带计数 信息, 所述上行调度信令中携带所述当前反馈窗口内的下行数据包传输情况信 息;
终端根据所述下行数据包传输情况信息确定需要在所述上行子帧中发送的 应答 /否定应答 ACK/NACK序列的长度, 根据所述计数信息确定所述下行调度 信令所调度的下行数据包对应的 ACK/NACK信息在所述 ACK/NACK序列中的 位置;
终端根据确定的长度和位置信息生成 ACK/NACK 序列, 并将该 ACK/NACK序列发送给基站。
10、 如权利要求 9 所述的方法, 其特征在于, 在所述下行数据包传输情况 信息为所述当前反馈窗口内进行了下行数据包调度传输的下行子帧的总数目 时, 所述终端根据所述下行数据包传输情况信息确定需要在所述上行子帧中发 送的 ACK/NACK序列的长度包括:
终端按照如下公式确定需要在所述上行子帧中发送的应答 /否定应答 ACK/NACK序列包含的比特数目 Q:
Q=C*N*M, 其中 C为码字数, 单码字传输时 C为 1 , 多码字传输时 C为 2; N为网络侧为终端配置的下行成员载波集合中下行成员载波的个数或该下行 成员载波集合中处于激活状态的下行成员载波的个数; M为所述下行子帧的总 数目; 或,
11、 如权利要求 10所述的方法, 其特征在于, 所述计数信息表示发送所述 下行调度信令所调度的下行数据包的下行子帧是所述反馈窗口内进行下行数据 包调度传输的第几个下行子帧, 所述根据所述计数信息确定所述下行调度信令 所调度的下行数据包对应的 ACK/NACK信息在所述 ACK/NACK序列中的位置 包括:
将所述 ACK/NACK序列中的 Q比特分为 M部分;
若所述计数信息的取值为 P, 发送所述下行调度信令所调度的下行数据包 的下行子帧位于所述多个下行成员载波中的第 I个载波上, 当单码字传输时,则 确定该下行数据包对应的 ACK/NACK信息占用所述 M部分中第 P部分的第 I 个比特位置; 当多码字传输时, 则确定该下行数据包对应的 ACK/NACK信息占 用所述 M部分中第 P部分的第 2*1-1和第 2*1个比特位置; 或,
若所述计数信息的取值为 P, 发送所述下行调度信令所调度的下行数据包 的下行子帧位于所述多个下行成员载波中的第 I 个载波上, 则确定该下行数据 包对应的 ACK/NACK信息占用所述 M部分中第 P部分的第 c„+l和第; ^C„个 比特位置, 其中 C„为载波《上的码字数, 单码字传输时 ^ 为 1 , 多码字传输时 c "为。
12、 如权利要求 9 所述的方法, 其特征在于, 在所述下行数据包传输情况 信息为所述反馈窗口内调度传输的下行数据包的总数目时, 所述终端根据所述 下行数据包传输情况信息确定需要在所述上行子帧中发送的 ACK/NACK序列 的长度包括:
终端按照如下公式确定需要在所述上行子帧中发送的 ACK/NACK序列包 含的比特数目 Q:
Q=C*M, 其中 C为码字数, 单码字传输时 C为 1 , 多码字传输时 C为 2; M为所述下行数据包的总数目。
13、 如权利要求 12所述的方法, 其特征在于, 所述计数信息表示所述下行 调度信令所调度的下行数据包是所述反馈窗口内调度传输的第几个下行数据 包, 所述根据所述计数信息确定所述下行调度信令所调度的下行数据包对应的 ACK/NACK信息在所述 ACK/NACK序列中的位置包括:
若所述下行调度信令所调度的下行数据包是在当前反馈窗口内接收到的第 I个数据包, 则确定该下行数据包对应的 ACK/NACK信息占用所述 ACK/NACK 序列的第 I个比特位置。
14、 一种基站, 其特征在于, 该基站包括:
下行调度信令发送单元, 用于需要在当前反馈窗口内调度终端接收下行数 据包时, 将计数信息携带在下行调度信令中, 并将该下行调度信令发送给终 端;
上行调度信令发送单元, 用于需要调度终端在当前反馈窗口对应的上行子 帧中发送物理上行共享信道 PUSCH 时, 将当前反馈窗口内的下行数据包传输 情况信息携带在上行调度信令中, 并将该上行调度信令发送给终端; 所述计数信息是终端用于确定所述下行调度信令所调度的下行数据包对应 的应答 /否定应答 ACK/NACK信息在所述上行子帧中发送的 ACK/NACK序列中 位置的信息; 所述下行数据包传输情况信息是用于终端确定所述 ACK/NACK 序列的长度的信息; 所述当前反馈窗口包括终端支持的多个下行成员载波上需
15、 如权利要求 14所述的基站, 其特征在于, 所述上行调度信令发送单元 用于:
将当前反馈窗口内进行了下行数据包调度传输的下行子帧的总数目或者当 前反馈窗口内调度传输的下行数据包的总数目携带在上行调度信令中, 并将该 上行调度信令发送给终端。
16、 如权利要求 14所述的基站, 其特征在于, 所述上行调度信令发送单元 用于:
在一个下行子帧中向所述终端发送多个上行调度信令时, 携带在每个上行 调度信令中的下行数据包传输情况信息的取值是相同的。
17、 如权利要求 15所述的基站, 其特征在于, 所述下行调度信令发送单元 用于:
在所述上行调度信令发送单元将当前反馈窗口内进行了下行数据包调度传 输的下行子帧的总数目携带在上行调度信令中时, 将表示发送所述下行调度信 令所调度的下行数据包的下行子帧是所述反馈窗口内进行下行数据包调度传输 的第几个下行子帧的计数信息携带在下行调度信令中, 并将该下行调度信令发 送给终端。
18、 如权利要求 15所述的基站, 其特征在于, 所述下行调度信令发送单元 用于:
在所述上行调度信令发送单元将当前反馈窗口内调度传输的下行数据包的 总数目携带在上行调度信令中时, 将表示所述下行调度信令所调度的下行数据 包是所述反馈窗口内调度传输的第几个下行数据包的计数信息携带在下行调度 信令中, 并将该下行调度信令发送给终端。
19、 如权利要求 14-18 中任一所述的基站, 其特征在于, 所述上行调度信 令发送单元用于:
将确定的当前反馈窗口内的下行数据包传输情况信息携带在上行调度信令 的下行分配标识 DAI域中;
所述下行调度信令发送单元用于:
将所述计数信息携带在所述下行调度信令的 DAI域中。
20、 如权利要求 19所述的基站, 其特征在于, 所述上行调度信令发送单元 用于:
在一个下行子帧中向所述终端发送多个上行调度信令时, 每个上行调度信 令中的 DAI域的取值是相同的。
21、 如权利要求 14-18 中任一所述的基站, 其特征在于, 所述终端支持的 多个下行成员载波为:
网络侧为终端配置的下行成员载波集合中的多个下行成员载波; 或者, 网络侧为终端配置的下行成员载波集合中处于激活状态的多个下行成员载 波。
22、 一种终端, 其特征在于, 该终端包括:
调度信令接收单元, 用于接收基站在当前反馈窗口内发来的调度本终端接 收下行数据包的下行调度信令, 以及基站发来的调度本终端在当前反馈窗口所 对应的上行子帧中发送物理上行共享信道 PUSCH 的上行调度信令; 所述下行 调度信令中携带计数信息, 所述上行调度信令中携带所述当前反馈窗口内的下 行数据包传输情况信息;
反馈序列长度位置确定单元, 用于根据所述下行数据包传输情况信息确定 需要在所述上行子帧中发送的应答 /否定应答 ACK/NACK序列的长度, 根据所 述计数信息确定所述下行调度信令所调度的下行数据包对应的 ACK/NACK信 息在所述 ACK/NACK序列中的位置;
反馈序列发送单元, 用于根据所述反馈序列长度位置确定单元确定的长度 和位置信息生成 ACK/NACK序列, 并将该 ACK/NACK序列发送给基站。
23、 如权利要求 22所述的终端, 其特征在于, 所述反馈序列长度位置确定 单元用于:
在所述下行数据包传输情况信息为所述反馈窗口内进行了下行数据包调度 传输的下行子帧的总数目时, 按照如下公式确定需要在所述上行子帧中发送的
Q=C*N*M, 其中 C为码字数, 单码字传输时 C为 1 , 多码字传输时 C为 2; N为网络侧为终端配置的下行成员载波集合中下行成员载波的个数或该下行 成员载波集合中处于激活状态的下行成员载波的个数; M为所述下行子帧的总 数目; 或,
= ^ Μ , 其中 C„为载波《上的码字数, 单码字传输时 ^ 为 多码字传 输时 (^为 2; N 为网络侧为终端配置的下行成员载波集合中下行成员载波的个 数或该下行成员载波集合中处于激活状态的下行成员载波的个数; 未激活载波 上 ^ 为 1 ; M为所述下行子帧的总数目。
24、 如权利要求 23所述的终端, 其特征在于, 所述反馈序列长度位置确定 单元用于:
在所述计数信息表示发送所述下行调度信令所调度的下行数据包的下行子 帧是所述反馈窗口内进行下行数据包调度传输的第几个下行子帧时, 将所述 ACK/NACK序列中的 Q比特分为 M部分; 若所述计数信息的取值为 P, 发送所 述下行调度信令所调度的下行数据包的下行子帧位于所述多个下行成员载波中 的第 I个载波上, 当单码字传输时, 则确定该下行数据包对应的 ACK/NACK信 息占用所述 M部分中第 P部分的第 I个比特位置; 当多码字传输时, 则确定该 下行数据包对应的 ACK/NACK信息占用所述 M部分中第 P部分的第 2*1-1和第 2*1个比特位置; 或,
若所述计数信息的取值为 P, 发送所述下行调度信令所调度的下行数据包 的下行子帧位于所述多个下行成员载波中的第 I 个载波上, 则确定该下行数据 包对应的 ACK/NACK信息占用所述 M部分中第 P部分的第 c„+l和第; ^C„个 比特位置, 其中 C„为载波《上的码字数, 单码字传输时 ^ 为 1 , 多码字传输时 c "为。
25、 如权利要求 22所述的终端, 其特征在于, 所述反馈序列长度位置确 定单元用于:
在所述下行数据包传输情况信息为所述反馈窗口内调度传输的下行数据包 的总数目时, 按照如下公式确定需要在所述上行子帧中发送的 ACK/NACK序 列包含的比特数目 Q:
Q=C*M, 其中 C为码字数, 单码字传输时 C为 1 , 多码字传输时 C为 2; M为所述下行数据包的总数目。
26、 如权利要求 25所述的终端, 其特征在于, 所述反馈序列长度位置确 定单元用于:
在所述计数信息表示所述下行调度信令所调度的下行数据包是所述反馈窗 口内调度传输的第几个下行数据包时, 若所述下行调度信令所调度的下行数据 包是在当前反馈窗口内接收到的第 I 个数据包, 则确定该下行数据包对应的 ACK/NACK信息占用所述 ACK/NACK序列的第 I个比特位置。
27、 一种长期演进升级 LTE-A通信系统, 其特征在于, 该系统包括: 基站, 用于需要在当前反馈窗口内调度终端接收下行数据包时, 将计数信 息携带在下行调度信令中, 并将该下行调度信令发送给终端; 需要调度终端在 当前反馈窗口对应的上行子帧中发送物理上行共享信道 PUSCH 时, 将当前反 馈窗口内的下行数据包传输情况信息携带在上行调度信令中, 并将该上行调度 信令发送给终端; 所述当前反馈窗口包括终端支持的多个下行成员载波上需要 终端, 用于接收所述上行调度信令和下行调度信令, 根据所述下行数据包 传输情况信息确定需要在所述上行子帧中发送的应答 /否定应答 ACK/NACK序 列的长度, 根据所述计数信息确定所述下行调度信令所调度的下行数据包对应 的 ACK/NACK信息在所述 ACK/NACK序列中的位置; 根据确定的长度和位置 信息生成 ACK/NACK序列, 并将该 ACK/NACK序列发送给基站。
28、 如权利要求 27所述的系统, 其特征在于, 所述基站用于:
将当前反馈窗口内进行了下行数据包调度传输的下行子帧的总数目携带在 上行调度信令中, 并将该上行调度信令发送给终端;
所述终端用于:
按照如下公式确定需要在所述上行子帧中发送的 ACK/NACK序列包含的 比特数目 Q:
Q=C*N*M, 其中 C为码字数, 单码字传输时 C为 1 , 多码字传输时 C为 2; N为网络侧为终端配置的下行成员载波集合中下行成员载波的个数或该下行 成员载波集合中处于激活状态的下行成员载波的个数; M为所述下行子帧的总 数目; 或,
= ^ Μ , 其中 C„为载波《上的码字数, 单码字传输时 ^ 为 多码字传 输时 (^为 2; N 为网络侧为终端配置的下行成员载波集合中下行成员载波的个 数或该下行成员载波集合中处于激活状态的下行成员载波的个数; 未激活载波 上 ^ 为 1 ; M为所述下行子帧的总数目。
29、 如权利要求 28所述的系统, 其特征在于, 所述基站用于:
将表示发送所述下行调度信令所调度的下行数据包的下行子帧是所述反馈 窗口内进行下行数据包调度传输的第几个下行子帧的计数信息携带在所述下行 调度信令中, 并将该下行调度信令发送给终端;
所述终端用于: 将所述 ACK/NACK序列中的 Q比特分为 M部分;
若所述计数信息的取值为 P, 发送所述下行调度信令所调度的下行数据包 的下行子帧位于所述多个下行成员载波中的第 I个载波上, 当单码字传输时,则 确定该下行数据包对应的 ACK/NACK信息占用所述 M部分中第 P部分的第 I 个比特位置; 当多码字传输时, 则确定该下行数据包对应的 ACK/NACK信息占 用所述 M部分中第 P部分的第 2*1-1和第 2*1个比特位置; 或,
若所述计数信息的取值为 P, 发送所述下行调度信令所调度的下行数据包 的下行子帧位于所述多个下行成员载波中的第 I 个载波上, 则确定该下行数据 包对应的 ACK/NACK信息占用所述 M部分中第 P部分的第 c„+l和第; ^C„个 比特位置, 其中 C„为载波《上的码字数, 单码字传输时 ^ 为 1 , 多码字传输时 c "为。
30、 如权利要求 27所述的系统, 其特征在于, 所述基站用于:
将当前反馈窗口内调度传输的下行数据包的总数目携带在上行调度信令 中, 并将该上行调度信令发送给终端;
所述终端用于:
按照如下公式确定需要在所述上行子帧中发送的 ACK/NACK序列包含的 比特数目 Q, 并向基站发送比特数目为 Q的 ACK/NACK序列:
Q=C*M, 其中 C为码字数, 单码字传输时 C为 1 , 多码字传输时 C为 2; M为所述下行数据包的总数目。
31、 如权利要求 30所述的系统, 其特征在于, 所述基站用于:
将表示所述下行调度信令所调度的下行数据包是所述反馈窗口内调度传输 的第几个下行数据包的计数信息携带在所述下行调度信令中, 并将该下行调度 信令发送给终端;
所述终端用于:
若所述下行调度信令所调度的下行数据包是在当前反馈窗口内接收到的第 I个数据包, 则确定该下行数据包对应的 ACK/NACK信息占用所述 ACK/NACK 序列的第 I个比特位置。
32、 如权利要求 27所述的系统, 其特征在于, 所述基站用于:
在一个下行子帧中向所述终端发送多个上行调度信令时, 携带在每个上行 调度信令中的下行数据包传输情况信息的取值是相同的。
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