WO2011120277A1 - 载波聚合场景下非周期反馈的方法和系统 - Google Patents

载波聚合场景下非周期反馈的方法和系统 Download PDF

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Publication number
WO2011120277A1
WO2011120277A1 PCT/CN2010/076155 CN2010076155W WO2011120277A1 WO 2011120277 A1 WO2011120277 A1 WO 2011120277A1 CN 2010076155 W CN2010076155 W CN 2010076155W WO 2011120277 A1 WO2011120277 A1 WO 2011120277A1
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WIPO (PCT)
Prior art keywords
aperiodic
signaling
fed back
user equipment
feedback
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PCT/CN2010/076155
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English (en)
French (fr)
Inventor
戴博
吴欣
曾萍
郁光辉
左志松
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中兴通讯股份有限公司
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Application filed by 中兴通讯股份有限公司 filed Critical 中兴通讯股份有限公司
Priority to EP10848736.4A priority Critical patent/EP2555577B1/en
Priority to RU2012145285/08A priority patent/RU2533680C2/ru
Priority to KR1020127026134A priority patent/KR101478421B1/ko
Priority to JP2013501596A priority patent/JP5593437B2/ja
Priority to US13/638,756 priority patent/US8879494B2/en
Publication of WO2011120277A1 publication Critical patent/WO2011120277A1/zh

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Classifications

    • 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
    • H04L5/0001—Arrangements for dividing the transmission path
    • H04L5/0003—Two-dimensional division
    • H04L5/0005—Time-frequency
    • H04L5/0007—Time-frequency the frequencies being orthogonal, e.g. OFDM(A), DMT
    • H04L5/001—Time-frequency the frequencies being orthogonal, e.g. OFDM(A), DMT the frequencies being arranged in component carriers
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W72/00—Local resource management
    • H04W72/20—Control channels or signalling for resource management
    • H04W72/23—Control channels or signalling for resource management in the downlink direction of a wireless link, i.e. towards a terminal
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L5/00—Arrangements affording multiple use of the transmission path
    • H04L5/0091—Signaling for the administration of the divided path
    • H04L5/0094—Indication of how sub-channels of the path are allocated
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W24/00—Supervisory, monitoring or testing arrangements
    • H04W24/10—Scheduling measurement reports ; Arrangements for measurement reports
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W48/00—Access restriction; Network selection; Access point selection
    • H04W48/08—Access restriction or access information delivery, e.g. discovery data delivery
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W72/00—Local resource management
    • H04W72/20—Control channels or signalling for resource management
    • H04W72/21—Control channels or signalling for resource management in the uplink direction of a wireless link, i.e. towards the network
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04B—TRANSMISSION
    • H04B7/00—Radio transmission systems, i.e. using radiation field
    • H04B7/02—Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas
    • H04B7/04—Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas using two or more spaced independent antennas
    • H04B7/06—Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas using two or more spaced independent antennas at the transmitting station
    • H04B7/0613—Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas using two or more spaced independent antennas at the transmitting station using simultaneous transmission
    • H04B7/0615—Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas using two or more spaced independent antennas at the transmitting station using simultaneous transmission of weighted versions of same signal
    • H04B7/0619—Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas using two or more spaced independent antennas at the transmitting station using simultaneous transmission of weighted versions of same signal using feedback from receiving side
    • H04B7/0636—Feedback format
    • H04B7/0643—Feedback on request
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W28/00—Network traffic management; Network resource management
    • H04W28/02—Traffic management, e.g. flow control or congestion control
    • H04W28/06—Optimizing the usage of the radio link, e.g. header compression, information sizing, discarding information
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W72/00—Local resource management
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W72/00—Local resource management
    • H04W72/04—Wireless resource allocation

Definitions

  • a radio frame in a Long Term Evolution (LTE) system includes a frame structure of a Frequency Division Duplex (FDD) mode and a Time Division Duplex (TDD) mode.
  • FDD mode frame structure as shown in Figure 1, a 10 millisecond (ms) radio frame consists of twenty slots of length 0.5ms, numbered 0 ⁇ 19, and slots 2i and 2i+l
  • Subframe i (subframe) of length 1 ms solicit Frame structure of TDD mode, as shown in FIG.
  • a 10 ms radio frame is composed of two half frames of 5 ms length, and one field includes 5 lengths.
  • subframe i is defined as two slots 2i and 2i+1 that are 0.5 ms long.
  • one slot Contains 7 symbols with a length of 66.7 start seconds (us), where the first symbol has a CP length of 5.21us and the remaining 6 symbols have a length of 4.69 us;
  • extended cyclic prefix Extended Cyclic Prefix
  • one The time slot contains 6 symbols, and the CP length of all symbols is 16.67 us.
  • the user equipment obtains the quality information of the downlink channel according to the downlink pilot (reference signal), and then returns the downlink channel quality information to eNB (base station), the base station feedbacks according to the UE
  • the channel quality information is determined, the code modulation mode and the physical resource location sent to the UE data, and the transmission mode are determined.
  • the manner in which the UE feeds back the downlink channel quality information includes two types: periodic feedback and aperiodic feedback, and the periodic feedback is feedback according to a predetermined period.
  • the base station triggers the UE to perform aperiodic feedback by using 1-bit signaling in the DCI (Downlink Control Information) format 0, and The feedback information is carried on the PUSCH channel, and the DCI information is transmitted through a Physical Downlink Control Channel (PDCCH).
  • the Advanced Long Term Evolution (LTE-A, Long-Term Evolution Advanced) is an evolved version of LTE Release-8.
  • Backward compatibility is required in the requirements of advanced international wireless communication systems proposed by the International Telecommunication Union Radiocommunication Group.
  • the requirements for backward compatibility between LTE-Advanced and LTE Release-8 refer to: LTE Release-8 user equipment can work in LTE-Advanced network; LTE-Advanced user equipment can work in LTE Release-8 network .
  • LTE-Advanced should be able to operate in different sizes of frequency spectrum configurations, including a wider spectrum configuration than LTE Release-8 (for example, 100 MHz continuous spectrum resources) to achieve higher performance and goals. Peak rate.
  • LTE Release-8 for bandwidths greater than 20 MHz, a carrier aggregation method is used, that is, two or more component carriers are aggregated to support a downlink transmission bandwidth greater than 20 MHz.
  • one downlink component carrier DL CC is supported to transmit scheduling information (DCI Format) of other DL CCs, and, in order to identify the scheduled DL CC or UL CC, a carrier indication is introduced in the DCI Format i or CI, Carrier Indicator) Signaling.
  • DCI Format scheduling information
  • a carrier indication is introduced in the DCI Format i or CI, Carrier Indicator
  • a primary object of the present invention is to provide a method and system for aperiodic feedback in a carrier aggregation scenario to solve at least the above problems.
  • a method for aperiodic feedback in a carrier aggregation scenario includes the following steps: The base station sends aperiodic trigger signaling to the user equipment; the user equipment receives the aperiodic trigger signaling, according to the aperiodic Trigger signaling determines a downlink component carrier DL CC to be fed back; and aperiodic feedback of the determined DL CC by the user equipment.
  • a system for aperiodic feedback in a carrier aggregation scenario includes a base station and a user equipment, and a base station is configured to send aperiodic trigger signaling to the user equipment.
  • the user equipment includes: a receiving module, And receiving a non-periodic trigger signaling from the base station; and a triggering module, configured to determine, according to the aperiodic trigger signaling, a DL CC to be fed back, and trigger aperiodic feedback of the determined DL CC.
  • the user equipment receives the trigger of the base station, the user equipment first determines the DL CC that needs to be fed back, and then triggers the aperiodic feedback of the DL CC, which determines that the downlink cannot be determined according to the aperiodic trigger signaling in the carrier aggregation scenario.
  • the problem of the component carrier effectively reduces the uplink feedback of the DL CC that is not fed back.
  • the base station can adjust the resource allocation according to the information fed back by the user equipment to ensure the performance of the downlink data transmission.
  • FIG. 4 is a flowchart of a method for aperiodic feedback in a carrier aggregation scenario according to an embodiment of the present invention
  • FIG. 5 is a flowchart of a method for aperiodic feedback in a carrier aggregation scenario according to Example 1 of the present invention
  • FIG. 7 is a flowchart of a method for aperiodic feedback in a carrier aggregation scenario according to Example 3 of the present invention
  • FIG. 8 is a flowchart of a carrier aggregation scenario according to Example 4 of the present invention
  • FIG. 9 is a flowchart of a method for aperiodic feedback in a carrier aggregation scenario according to Example 5 of the present invention
  • FIG. 5 is a flowchart of a method for aperiodic feedback in a carrier aggregation scenario according to Example 1 of the present invention
  • FIG. 7 is a flowchart of a method for aperiodic feedback in a carrier aggregation scenario according to
  • FIG. 10 is a flowchart of a method for aperiodic feedback in a carrier aggregation scenario according to Example 6 of the present invention
  • 11 is a flowchart of a method for aperiodic feedback in a carrier aggregation scenario according to Example 7 of the present invention
  • FIG. 12 is a flowchart according to Example 8 of the present invention.
  • the base station triggers the acyclic feedback by the UE by sending the aperiodic triggering signaling, and the UE determines which downlink component carrier is triggered according to the signaling, and then completes the aperiodic feedback process.
  • an embodiment of the present invention provides a system for aperiodic feedback in a carrier aggregation scenario.
  • the system includes a base station 302 and a UE 304.
  • the base station 302 is configured to send aperiodic trigger signaling to the UE 304.
  • the UE 304 includes: a receiving module 3041, configured to receive the aperiodic trigger signaling from the base station 302, and a triggering module 3042, configured to determine, according to the aperiodic trigger signaling, a DL CC to be fed back, and trigger a acyclic feedback of the determined DL CC.
  • the UE in this embodiment first determines the DL CC that needs to be fed back, and then triggers the aperiodic feedback of the DL CC, which effectively reduces the uplink feedback of the DL CC that is unnecessary to feedback, and the base station can feedback according to the UE.
  • Information adjusts resource allocation to ensure the performance of downlink data transmission.
  • the embodiment of the present invention further provides a method for aperiodic feedback in a carrier aggregation scenario.
  • the method includes the following steps: Step 402: A base station sends aperiodic trigger signaling to a UE.
  • the UE in this embodiment When receiving the trigger of the base station, the UE in this embodiment first determines the DL CC that needs to be fed back, and then triggers the aperiodic feedback of the DL CC, which effectively reduces the uplink feedback of the DL CC that is unnecessary to feedback, and the base station can feedback according to the UE.
  • Information adjusts resource allocation to ensure the performance of downlink data transmission.
  • the aperiodic trigger signaling is carrier indication signaling used for cross-carrier scheduling.
  • the UE determines that the DL CC to be fed back is a plurality of DL CCs, and the aperiodic feedback of the determined DL CC by the UE is: the UE selects the channel quality information of the multiple DL CCs according to the frequency point.
  • the high or low level is arranged according to the level of the index of the DL CC, and the channel quality information of the arranged multiple DL CCs is transmitted to the base station.
  • the frequency points are arranged from high to low or low to high, or are arranged according to the index of the DL CC from high to low or low to high.
  • the implicit mapping mode may be any of the following:
  • the UE determines the DL CC carrying the aperiodic trigger signaling as the DL CC to be fed back;
  • the UE determines the DL CC that carries the aperiodic triggering signaling as the first DL CC, and the UE determines all the DL CCs that send the scheduling information on the first DL CC as the DL CC to be fed back;
  • the UE has a correspondence between the DL CC and the uplink control channel UL CC, and the UE determines the first UL CC according to the scheduling information of the bearer aperiodic trigger signaling, and searches for the first UL according to the correspondence between the saved DL CC and the UL CC.
  • the DL CC corresponding to the CC determines the DL CC found as the DL CC to be fed back.
  • the first UL CC is an uplink component carrier that sends a physical uplink shared channel carrying aperiodic feedback information.
  • the predefined method determines that the DL CC to be fed back can use the following methods: 1) The base station pre-configures the UE to receive data on the designated DL CC; when the UE receives the aperiodic trigger signal on one DL CC in the designated DL CC Let the specified DL CC be determined as the DL CC to be fed back.
  • the designated DL CC is a DL CC that is pre-configured by the base station to the user equipment to receive data, so the designated DL CC may be multiple DL CCs;
  • the base station configures a first correspondence by using the high layer signaling in advance, where the first correspondence is a correspondence between the DL CC that receives the aperiodic trigger signaling and the DL CC that needs to be fed back; the UE determines, according to the first correspondence, The DL CC corresponding to the DL CC corresponding to the periodic trigger signaling corresponds to the feedback.
  • the above-mentioned implicit mapping mode and the aperiodic triggering signaling in the predefined manner are located in the DCI Format field of the scheduling information of the physical uplink shared channel.
  • the signaling indication manner determines that the DL CC to be fed back can use the following methods: 1) the aperiodic trigger signaling is n bits, n is greater than 1; each bit in the n bits corresponds to one
  • the UE determines whether the specified value is in the n bit, If so, the DL CC corresponding to the bit where the specified value is located is determined as the DL cc to be fed back.
  • the aperiodic trigger signaling is n bits, and n is greater than 1; the n-bit decimal number corresponds to one DL CC or does not trigger aperiodic feedback; when the UE receives the aperiodic trigger signaling, the UE substitutes the n-bit decimal
  • the DL CC corresponding to the number is determined as the DL CC to be fed back.
  • the uplink carrier that sends the physical uplink shared channel carrying the aperiodic feedback information is predefined by the base station by using high layer signaling.
  • n in the manner indicated by the signaling is one of the following: the maximum number of component carriers aggregated in the system; the number of DL CCs allocated to the UE for the physical downlink shared channel PDSCH configured for the base station; configured for the base station to the UE on one DL CC The maximum number of carriers for scheduling DL CCs; configured for the base station to allocate the maximum number of carriers of the DL CC to the DL CCs that trigger the aperiodic signaling.
  • the foregoing three methods are described by using specific examples. The methods provided in the examples 1-7 can be applied to cross-carrier scheduling or non-cross-carrier scheduling. In actual use, these methods can be combined in any combination, for example.
  • Example 1 This example provides a method for aperiodic feedback in a carrier aggregation scenario.
  • the UE supports 5 DL CCs and 5 UL CCs.
  • the DL CCs and UL CCs are numbered separately, according to the number DL CC and UL CC.
  • the mapping includes the following steps: Step 502: The base station sends a DCI Format carrying the aperiodic trigger signaling on the DL CC #3.
  • Step 504 The UE receives the non-DL on the DL CC #3. After periodic trigger signaling, acyclic feedback of DL CC#3 is triggered.
  • the aperiodic triggering signaling in this example is 1 bit, and the aperiodic triggering signaling indicates the aperiodic feedback of the target downlink component carrier, where the target downlink component carrier is the DL CC that sends the trigger signaling.
  • the trigger signaling is located in the DCI Format i or the scheduling information carrying the physical uplink shared channel.
  • the eNB of the present example uses the DL CC that receives the aperiodic triggering signaling as the DL CC that needs to be fed back, and solves the problem that the DL CC that needs to be fed back cannot be determined in the carrier aggregation scenario, and the method is simple to implement, and does not add any signaling overhead. .
  • Example 2 This example provides a method for aperiodic feedback in a carrier aggregation scenario.
  • the UE supports 4 DL CCs and 4 UL CCs.
  • the DL CCs and UL CCs are numbered separately.
  • Step 602 The base station sends a DCI Format carrying the aperiodic trigger signaling on the DL CC #3.
  • Step 604 The UE receives the non-DL on the DL CC #3. Trigger DL CC# after periodic trigger signaling
  • the aperiodic trigger signaling in this example is 1 bit, and the aperiodic trigger signaling indicates aperiodic feedback of the target downlink component carrier, where the target downlink component carrier is all that the UE can schedule on the DL CC that sends the trigger signaling.
  • DL CC; the aperiodic trigger signaling in this example is located in the scheduling information of the physical uplink shared channel
  • the UE in this example uses the DL CC# 3 and the DL CC# 4 corresponding to the DL CC# 3 that receives the aperiodic trigger signaling as the DL CC that needs to be fed back, and solves the problem that the DL CC that needs to be fed back cannot be determined in the carrier aggregation scenario. And the method is simple to implement, without adding any signaling overhead. At the same time, the uplink feedback of the DL CC with unnecessary feedback is effectively reduced, and the base station can adjust the resource allocation according to the information fed back by the UE to ensure the performance of the downlink data transmission.
  • Example 3 This example provides a method for aperiodic feedback in a carrier aggregation scenario.
  • the UE supports 4 DL CCs and 2 UL CCs.
  • the DL CCs and UL CCs are numbered separately.
  • DL CC# 1 Corresponding to DL CC#2 and UL CC#1, DL CC#3 and DL CC#4 correspond to UL CC# 2; Referring to FIG.
  • the method includes the following steps: Step 702, the base station is on DL CC #3 Transmitting a DCI Format carrying aperiodic trigger signaling; Step 704: After receiving the aperiodic trigger signaling on the DL CC #3, the UE determines that the DCI Format carrying the aperiodic trigger signaling indicates that the DL CC#3 and the DL CC#4 are triggered when the PUSCH is sent on the UL CC#2. Acyclic feedback.
  • the DL CC information corresponding to the UL CC is configured by the base station to the UE by using the signaling; the aperiodic trigger signaling in the example is 1 bit, and the aperiodic trigger signaling indicates the aperiodic feedback of the target downlink component carrier, where the target The downlink component carrier is all DL CCs corresponding to the UL CC where the physical uplink shared channel that transmits the aperiodic feedback information is located; the aperiodic trigger signaling in this example is located in the DCI Format field of the scheduling information carrying the physical uplink shared channel.
  • the UE of the present example determines the UL CC# 2 according to the DL CC# 3 that receives the aperiodic trigger signaling, and solves the DL CC# 3 and the DL CC# 4 as the DL CC that needs feedback according to the DL CC information corresponding to the UL CC.
  • the problem of the DL CC to be fed back cannot be determined, and the method is simple to implement without any signaling overhead.
  • the uplink feedback of the DL CC with unnecessary feedback is effectively reduced, and the base station can adjust the resource allocation according to the information fed back by the UE to ensure the performance of the downlink data transmission.
  • Example 4 provides a method for aperiodic feedback in a carrier aggregation scenario, where the UE supports 5 DL CCs and 5 UL CCs, according to the number between the DL CC and the UL CC - mapping, the base station is pre- The UE is configured to receive data on the DL CC #1, the DL CC #2, and the DL CC #3.
  • the method includes the following steps: Step 802: The base station sends bearer aperiodic trigger signaling on the DL CC #3.
  • the aperiodic triggering signaling in this example is 1 bit, and the aperiodic triggering signaling indicates aperiodic feedback of the target downlink component carrier, where the target downlink component carrier is all DL CCs of the PDSCH that the base station configures for the UE.
  • the aperiodic trigger signaling in this example is located in the DCI Format field of the scheduling information carrying the physical uplink shared channel.
  • the UE in this example uses DL CC#1, DL CC#2, and DL CC#3 as the DL CCs that need to be fed back according to the configuration information, and solves the problem that the feedback needs to be determined in the carrier aggregation scenario.
  • the problem of DL CC, and the method is simple to implement, without adding any signaling overhead.
  • the uplink feedback of the DL CC with unnecessary feedback is effectively reduced, and the base station can adjust the resource allocation according to the information fed back by the UE to ensure the performance of the downlink data transmission.
  • Example 5 This example provides a method for aperiodic feedback in a carrier aggregation scenario, where the UE supports 5 DL CCs and 5 UL CCs, according to the number between the DL CC and the UL CC - mapping, the base station passes The high-level (RRC) signaling configuration UE triggers aperiodic feedback of DL CC#3 and DL CC#4 when receiving the aperiodic trigger signaling on the DL CC#3;
  • the method includes the following steps: Step 902: The base station sends a DCI Format carrying the aperiodic trigger signaling on the DL CC #3.
  • Step 904 After receiving the aperiodic trigger signaling on the DL CC #3, the UE triggers the aperiodic of the DL CC#3 and the DL CC#4. Feedback.
  • the aperiodic triggering signaling in this example is 1 bit, and the aperiodic triggering signaling indicates aperiodic feedback of the target downlink component carrier, where the target downlink component carrier is configured by the base station through high layer signaling.
  • the aperiodic trigger signaling in this example is located in the DCI Format field of the scheduling information carrying the physical uplink shared channel.
  • the UE of the present example After receiving the aperiodic triggering signaling on the DL CC#3, the UE of the present example uses the DL CC#3 and the DL CC#4 as the DL CCs that need to be fed back, and solves the problem that the feedback needs to be determined in the carrier aggregation scenario.
  • the problem of the DL CC, and the method is simple to implement, without adding any signaling overhead.
  • the uplink feedback of the DL CC with unnecessary feedback is effectively reduced, and the base station can adjust the resource allocation according to the information fed back by the UE to ensure the performance of the downlink data transmission.
  • Example 6 provides a method for aperiodic feedback in a carrier aggregation scenario, where the UE supports 5 DL CCs and 5 UL CCs, according to the number between the DL CC and the UL CC - mapping, aperiodic
  • step 1004 after receiving the aperiodic trigger signaling 00110 on the DL CC #3, the UE triggers the non-DL CC#3 and the DL CC#4. Cycle feedback.
  • the aperiodic trigger signaling in this example is n bits, each bit represents whether a DL CC aperiodic feedback is triggered, and the DL CCs corresponding to each bit are different from each other; the aperiodic trigger signaling indicates that the target downlink component carrier is triggered.
  • Periodic feedback where the target downlink component carrier is determined by aperiodic trigger signaling.
  • the UE of the present example After receiving the aperiodic trigger signaling 00110 on the DL CC #3, the UE of the present example uses the DL CC #3 and the DL CC #4 as the DL CCs that need to be fed back, and solves the problem that the DL that needs to be fed back cannot be determined in the carrier aggregation scenario.
  • the problem with CC, and the method is simple to implement.
  • the uplink feedback of the DL CC with unnecessary feedback is effectively reduced, and the base station can adjust the resource allocation according to the information fed back by the UE to ensure the performance of the downlink data transmission.
  • Example 7 This example provides a method for aperiodic feedback in a carrier aggregation scenario.
  • the UE supports 5 DL CCs and 5 UL CCs.
  • the method includes the following steps: Step 1102: The base station sends the aperiodic trigger signaling 011 on the DL CC #3. In step 1104, after receiving the aperiodic trigger signaling 011 on the DL CC #3, the UE triggers the DL.
  • the aperiodic triggering signaling indicates the aperiodic feedback of the target downlink component carrier.
  • the target downlink component carrier is determined by the aperiodic triggering signaling.
  • the aperiodic triggering signaling in this example is n bits, indicating whether the aperiodic feedback is triggered.
  • a DL CC index that triggers acyclic feedback.
  • Example 8 This example provides a method for aperiodic feedback in a carrier aggregation scenario.
  • the aperiodic trigger signaling is used as carrier indication signaling for cross-carrier scheduling, and the non-periodic feedback PUSCH is sent.
  • 111 means that no DL CC is triggered
  • 000-100 corresponds to the index of the triggered DL CC
  • the base station configures the UE to transmit the UL CC of the PUSCH of the aperiodic feedback as UL CC1, and then reuses the DCI in the cross-carrier scheduling.
  • the carrier indication signaling in the format is aperiodic trigger signaling. Referring to FIG.
  • Step 1202 The base station sends aperiodic trigger signaling 011 on DL CC #3; Step 1204, the UE is in the DL CC After receiving the aperiodic trigger signaling 011 on #3, the aperiodic feedback of DL CC#3 is triggered. After receiving the aperiodic triggering signaling 011, the UE in this example uses DL CC#3 as the DL CC that needs to be fed back, and solves the problem that the DL CC that needs to be fed back cannot be determined in the carrier aggregation scenario, and the method is simple to implement.
  • the uplink feedback of the DL CC with unnecessary feedback is effectively reduced, and the base station can adjust the resource allocation according to the information fed back by the UE to ensure the performance of the downlink data transmission.
  • the system can use instance 1.
  • the system can use other instances.
  • each DL The channel information of the CC is arranged according to whether the frequency point is high to low or low to high, or the channel information of each DL CC is arranged according to the index of the DL CC from high to low or low to high, and the multiple arranged will be arranged.
  • the channel condition of the DL CC is transmitted to the base station through the PUSCH on the target UL CC.
  • the DL CC and the UL CC supported by the UE in the foregoing examples 1-8 may not be limited to the specific number, and the number of supported DL CCs and UL CCs may be configured according to the use requirements, and these applications are all within the scope of the present invention.
  • the present invention achieves the following technical effects:
  • the embodiment of the present invention determines the downlink component required for feedback during aperiodic feedback triggering by means of implicit mapping, predefined manner, or signaling indication.
  • the carrier ensures that the base station can flexibly trigger the aperiodic feedback of the downlink component carrier, reduce the waste of the uplink feedback, and ensure the performance of the downlink data transmission.
  • modules or steps of the present invention can be implemented by a general-purpose computing device, which can be concentrated on a single computing device or distributed over a network composed of multiple computing devices. Alternatively, they may be implemented by program code executable by the computing device, such that they may be stored in the storage device by the computing device and, in some cases, may be different from the order herein.
  • the steps shown or described are performed, or they are separately fabricated into individual integrated circuit modules, or a plurality of modules or steps are fabricated as a single integrated circuit module.

Abstract

本发明公开了一种载波聚合场景下非周期反馈的方法和系统。其中，所述方法包括：基站向用户设备发送非周期触发信令，所述用户设备接收所述非周期触发信令，根据所述非周期触发信令确定需反馈的DLCC，所述用户设备触发确定的DLCC的非周期反馈。通过本发明，解决了载波聚合场景下无法根据非周期触发信令确定反馈哪个下行分量载波的问题，有效地减少了不必要反馈的DLCC的上行反馈，基站可以根据用户设备反馈的信息调整资源分配，保证下行数据传输的性能。

Description

载波聚合场景下非周期反馈的方法和系统 技术领域 本发明涉及通信领域， 具体而言， 涉及一种载波聚合场景下非周期反馈 的方法和系统。 背景技术 长期演进 ( LTE, Long Term Evolution ) 系统中的无线帧 （ radio frame ) 包括频分双工 （FDD, Frequency Division Duplex )模式和时分双工 （TDD, Time Division Duplex )模式的帧结构。 FDD模式的帧结构， 如图 1所示， 一 个 10毫秒 （ms ) 的无线帧由二十个长度为 0.5ms, 编号 0〜19的时隙 （slot ) 组成， 时隙 2i和 2i+l组成长度为 1ms的子帧 i ( subframe )„ TDD模式的帧 结构， 如图 2所示， 一个 10ms的无线帧由两个长为 5ms的半帧（half frame ) 组成， 一个半帧包括 5个长度为 1ms的子帧， 子帧 i定义为 2个长为 0.5ms 的时隙 2i和 2i+l。 在上述两种帧结构里， 对于标准循环前缀（Normal CP, Normal Cyclic Prefix ), 一个时隙包含 7个长度为 66.7 啟秒（ us )的符号， 其 中第一个符号的 CP长度为 5.21us, 其余 6个符号的长度为 4.69 us; 对于扩 展循环前缀 ( Extended CP, Extended Cyclic Prefix ),一个时隙包含 6个符号， 所有符号的 CP长度均为 16.67 us。 用户设备（UE, User Equipment )根据下行导频 （参考信号） 获得下行 信道的质量信息， 然后， 将获得下行信道质量信息反馈给 eNB (基站）， 基 站根据 UE反馈的下行信道质量信息， 确定发送给 UE数据的编码调制方式 和物理资源位置， 以及传输模式， UE 反馈下行信道质量信息的方式有周期 反馈和非周期反馈两种， 周期反馈就是按照规定周期进行反馈， 非周期反馈 是指由基站通过下行信令触发 UE进行反馈。 在 LTE 系统中， 基站通过下行控制信息 （ DCI , Downlink Control Information ) format 0中的 1比特信令来触发 UE进行非周期反馈， 并且， 反馈信息通过 PUSCH信道 载， DCI信息通过物理下行控制信道（ PDCCH, Physical Downlink Control Channel ) 传输。 高级长期演进系统 （LTE-A, Long-Term Evolution Advanced ) 是 LTE Release-8的演进版本。 国际电信联盟无线电通信组提出的高级国际无线通信 系统需求中要求后向兼容。 在 LTE- Advanced与 LTE Release-8后向兼容的需 求是指： LTE Release- 8的用户设备可以在 LTE- Advanced的网络中工作； LTE- Advanced 的用户设备可以在 LTE Release- 8 的网络中工作。 另夕卜， LTE-Advanced应能在不同大小的频 i普配置， 包括比 LTE Release-8更宽的频 谱配置 （例如， 100MHz 的连续的频谱资源） 下工作， 以达到更高的性能和 目标峰值速率。考虑到与 LTE Release- 8的兼容性，对于大于 20MHz的带宽， 釆用频谱聚集 （Carrier aggregation ) 的方式， 即， 两个或以上的分量载波 ( Component Carrier ) 聚合以支持大于 20MHz的下行传输带宽； 在 LTE-A 系统中， 支持一个下行分量载波 DL CC发送其他 DL CC的调度信息 （DCI Format ), 并且， 为标识所调度的 DL CC或 UL CC, 在 DCI Format i或中引入 载波指示 ( CI, Carrier Indicator )信令。 发明人发现， 在多个分量载波聚合的时候， 相关技术中没有对非周期触 发信令的含义进行定义， 即非周期触发信令中没有表示触发非周期上哪个分 量载波的下行信道质量信息， 导致 UE无法根据非周期触发信令确定反馈哪 个下行分量载波，进而导致基站无法保证下行数据传输的性能。针对该问题， 目前尚未提出有效的解决方案。 发明内容 本发明的主要目的在于提供一种载波聚合场景下非周期反馈的方法和系 统， 以至少解决上述问题。 根据本发明的一个方面，提供了一种载波聚合场景下非周期反馈的方法， 包括以下步骤： 基站向用户设备发送非周期触发信令； 用户设备接收所述非 周期触发信令， 根据非周期触发信令确定需反馈的下行分量载波 DL CC; 以 及用户设备触发确定的 DL CC的非周期反馈。 根据本发明的另一方面，提供了一种载波聚合场景下非周期反馈的系统， 包括基站和用户设备； 基站， 用于向用户设备发送非周期触发信令； 用户设 备包括： 接收模块， 用于接收来自基站的非周期触发信令； 以及触发模块， 用于根据非周期触发信令确定需反馈的 DL CC, 以及触发确定的 DL CC的 非周期反馈。 通过本发明， 用户设备收到基站的触发时， 釆用先确定需要反馈的 DL CC, 然后触发该 DL CC的非周期反馈， 解决了载波聚合场景下无法根据非 周期触发信令确定反馈哪个下行分量载波的问题， 有效地减少了不必要反馈 的 DL CC的上行反馈，基站可以根据用户设备反馈的信息调整资源分配， 保 证下行数据传输的性能。 附图说明 此处所说明的附图用来提供对本发明的进一步理解， 构成本申请的一部 分， 本发明的示意性实施例及其说明用于解释本发明， 并不构成对本发明的 不当限定。 在附图中： 图 1是根据相关技术的 FDD模式的帧结构示意图； 图 2是根据相关技术的 TDD模式的帧结构示意图； 图 3 是根据本发明实施例的载波聚合场景下非周期反馈的系统结构框 图； 图 4是根据本发明实施例的载波聚合场景下非周期反馈的方法流程图； 图 5是根据本发明实例 1的载波聚合场景下非周期反馈的方法流程图； 图 6是根据本发明实例 2的载波聚合场景下非周期反馈的方法流程图； 图 7是根据本发明实例 3的载波聚合场景下非周期反馈的方法流程图； 图 8是根据本发明实例 4的载波聚合场景下非周期反馈的方法流程图； 图 9是根据本发明实例 5的载波聚合场景下非周期反馈的方法流程图； 图 10是根据本发明实例 6的载波聚合场景下非周期反馈的方法流程图； 图 11是根据本发明实例 7的载波聚合场景下非周期反馈的方法流程图； 以及 图 12是根据本发明实例 8的载波聚合场景下非周期反馈的方法流程图。 具体实施方式 下文中将参考附图并结合实施例来详细说明本发明。 需要说明的是， 在 不冲突的情况下， 本申请中的实施例及实施例中的特征可以相互组合。 在载波聚合场景下， 基站通过发送非周期触发信令触发 UE进行非周期 反馈， UE 根据该信令确定触发哪个下行分量载波， 进而完成非周期反馈过 程。 基于此， 本发明实施例提供了一种载波聚合场景下非周期反馈的系统， 参见图 3 , 该系统包括基站 302和 UE304; 基站 302 , 用于向 UE304发送非周期触发信令；
UE304包括：接收模块 3041 ,用于接收来自基站 302的非周期触发信令； 触发模块 3042 , 用于根据非周期触发信令确定需反馈的 DL CC, 以及触发确 定的 DL CC的非周期反馈。 本实施例的 UE收到基站的触发时， 先确定需要反馈的 DL CC, 然后触 发该 DL CC的非周期反馈，有效地减少了不必要反馈的 DL CC的上行反馈， 基站可以根据 UE反馈的信息调整资源分配， 保证下行数据传输的性能。 基于上述系统， 本发明实施例还提供了一种载波聚合场景下非周期反馈 的方法， 参见图 4 , 该方法包括以下步骤： 步骤 402 , 基站向 UE发送非周期触发信令； 步骤 404 , UE接收非周期触发信令， 根据该非周期触发信令确定需反馈 的 DL CC; 步骤 406 , UE触发确定的 DL CC的非周期反馈。 本实施例的 UE收到基站的触发时， 先确定需要反馈的 DL CC, 然后触 发该 DL CC的非周期反馈，有效地减少了不必要反馈的 DL CC的上行反馈， 基站可以根据 UE反馈的信息调整资源分配， 保证下行数据传输的性能。 优选地， 在跨载波调度时， 非周期触发信令为用作跨载波调度的载波指 示信令。 优选地， UE确定需反馈的 DL CC为多个 DL CC, 上述 UE触发确定的 DL CC的非周期反馈包括： UE将上述多个 DL CC的信道质量信息按照频点 的高低或按照 DL CC的索引的高低进行排列， 将排列后的多个 DL CC的信 道质量信息发送给基站。 例如， 按照频点从高到低或从低到高进行排列， 或 者， 按照 DL CC的索引从高到低或从低到高进行排列等。 需反馈的 DL CC的确定方法有多种， 例如： 隐含映射方式、 预定义的方 式或者信令指示的方式； 其中， 隐含映射方式可以为以下任意一种：
1 ) UE将承载非周期触发信令的 DL CC确定为需反馈的 DL CC;
2 ) UE将承载非周期触发信令的 DL CC确定为第一 DL CC, UE将在该 第一 DL CC上发送调度信息的所有 DL CC确定为需反馈的 DL CC;
3 ) UE上保存有 DL CC与上行控制信道 UL CC的对应关系， UE根据承 载非周期触发信令的调度信息确定第一 UL CC,根据保存的 DL CC与 UL CC 的对应关系查找第一 UL CC对应的 DL CC, 将查找到的 DL CC确定为需反 馈的 DL CC。 其中， 第一 UL CC为发送承载非周期反馈信息的物理上行共 享信道的上行分量载波。 预定义的方式确定需反馈的 DL CC可以釆用以下方法： 1 )基站预先配 置 UE在指定的 DL CC上接收数据； 当 UE在该指定的 DL CC中的一个 DL CC上接收非周期触发信令时， 将该指定的 DL CC确定为需反馈的 DL CC。 其中，指定的 DL CC为基站预先配置给该用户设备具有接收数据能力的所有 DL CC, 所以指定的 DL CC可以是多个 DL CC;
2 ) 基站预先通过高层信令配置第一对应关系， 其中， 第一对应关系为 接收非周期触发信令的 DL CC与需反馈的 DL CC的对应关系； UE根据第一 对应关系确定^载非周期触发信令的 DL CC对应的需反馈的 DL CC。 上述隐含映射方式和预定义的方式中的非周期触发信令位于^载物理上 行共享信道的调度信息的 DCI Format (下行控制信息格式） 域中。 信令指示的方式确定需反馈的 DL CC可以釆用以下方法： 1 ) 非周期触发信令为 n比特， n大于 1; n比特中的每个比特对应一个
DL CC, 并且， 当比特的值为指定值时， 表示触发该比特对应的 DL CC的非 周期反馈； UE接收到该非周期触发信令时， UE判断该 n比特中是否有上述 指定值， 如果有， 将该指定值所在的比特对应的 DL CC确定为需反馈的 DL cc。 2 ) 非周期触发信令为 n比特， n大于 1; 该 n比特的十进制数对应一个 DL CC或不触发非周期反馈； UE接收到该非周期触发信令时， UE将该 n比 特的十进制数对应的 DL CC确定为需反馈的 DL CC。 上述发送承载非周期反馈信息的物理上行共享信道的上行载波为基站通 过高层信令预先定义。 信令指示的方式中的 n为以下之一：为系统中聚合的最大分量载波数量； 为基站配置给 UE的传输物理下行共享信道 PDSCH的 DL CC数量； 为基站 配置给 UE在一个 DL CC上调度 DL CC的最大载波数量； 为基站配置给 UE 在发送触发非周期信令的 DL CC上调度 DL CC的最大载波数量。 下面以具体实例描述上述三种方式， 其中实例 1-7提供的方法可以应用 于跨载波调度， 也可以应用于非跨载波调度， 在实际使用时， 可以对这几种 方法进行任意组合， 例如， 从实例 1-7中任意选择两个方法， 一个用于跨载 波调度， 一个用于非跨载波调度。 实例 1 本实例提供了一种载波聚合场景下非周期反馈的方法， 其中， UE 支持 的 DL CC有 5个， UL CC有 5个， DL CC和 UL CC分别编号， 按照编号 DL CC和 UL CC之间——映射； 参见图 5 , 该方法包括以下步骤： 步骤 502, 基站在 DL CC #3上发送承载非周期触发信令的 DCI Format; 步骤 504, UE在 DL CC #3上接收到非周期触发信令后， 触发 DL CC#3 的非周期反馈。 本实例中的非周期触发信令为 1比特， 非周期触发信令表示触发目标下 行分量载波的非周期反馈， 其中， 目标下行分量载波为发送触发信令的 DL CC; 本实例中的非周期触发信令位于承载物理上行共享信道的调度信息的 DCI Format i或中。 本实例的 UE将接收非周期触发信令的 DL CC作为需要反馈的 DL CC, 解决了在载波聚合场景下无法确定需反馈的 DL CC的问题，且该方法实现简 单， 没有增加任何信令开销。 同时， 有效地减少了不必要反馈的 DL CC的上 行反馈， 基站可以根据 UE反馈的信息调整资源分配， 保证下行数据传输的 性能。 实例 2 本实例提供了一种载波聚合场景下非周期反馈的方法， 其中， UE 支持 的 DL CC有 4个， UL CC有 4个， DL CC和 UL CC分别编号， 按照编号
DL CC和 UL CC之间 映射， 对于 UE, DL CC# 1和 DL CC#2的 PDSCH 的调度信息在 DL CC#2上发送， DL CC# 3和 DL CC# 4的 PDSCH的调度信 息在 DL CC# 3上发送； 参见图 6 , 该方法包括以下步骤： 步骤 602 , 基站在 DL CC #3上发送承载非周期触发信令的 DCI Format; 步骤 604 , UE在 DL CC #3上接收到非周期触发信令后， 触发 DL CC#
3和 DL CC# 4的非周期反馈。 本实例中的非周期触发信令为 1比特， 非周期触发信令表示触发目标下 行分量载波的非周期反馈，其中， 目标下行分量载波为在发送触发信令的 DL CC上 UE可以调度的所有 DL CC; 本实例中的非周期触发信令位于^载物理上行共享信道的调度信息的
DCI Format 域中。 本实例的 UE将接收非周期触发信令的 DL CC# 3对应的 DL CC# 3和 DL CC# 4作为需要反馈的 DL CC, 解决了在载波聚合场景下无法确定需反 馈的 DL CC的问题， 且该方法实现简单， 没有增加任何信令开销。 同时， 有 效地减少了不必要反馈的 DL CC的上行反馈，基站可以根据 UE反馈的信息 调整资源分配， 保证下行数据传输的性能。 实例 3 本实例提供了一种载波聚合场景下非周期反馈的方法， 其中， UE 支持 的 DL CC有 4个， UL CC有 2个， DL CC和 UL CC分别编号， 对于 UE, DL CC# 1和 DL CC#2与 UL CC# 1对应， DL CC# 3和 DL CC# 4与 UL CC# 2对应； 参见图 7 , 该方法包括以下步 4聚： 步骤 702 , 基站在 DL CC #3上发送承载非周期触发信令的 DCI Format; 步骤 704, UE在 DL CC #3上接收到非周期触发信令后， 确定承载非周 期触发信令的 DCI Format表示在 UL CC# 2上发送 PUSCH时，触发 DL CC# 3和 DL CC# 4的非周期反馈。 其中， UL CC对应的 DL CC信息由基站通过信令配置给 UE; 本实例中的非周期触发信令为 1比特， 非周期触发信令表示触发目标下 行分量载波的非周期反馈， 其中， 目标下行分量载波为发送非周期反馈信息 的物理上行共享信道所在的 UL CC对应的所有 DL CC; 本实例中的非周期触发信令位于承载物理上行共享信道的调度信息的 DCI Format 域中。 本实例的 UE根据接收非周期触发信令的 DL CC# 3确定 UL CC# 2 , 根 据 UL CC对应的 DL CC信息将 DL CC# 3和 DL CC# 4作为需要反馈的 DL CC, 解决了在载波聚合场景下无法确定需反馈的 DL CC的问题， 且该方法 实现简单，没有增加任何信令开销。同时，有效地减少了不必要反馈的 DL CC 的上行反馈， 基站可以根据 UE反馈的信息调整资源分配， 保证下行数据传 输的性能。 实例 4 本实例提供了一种载波聚合场景下非周期反馈的方法， 其中， UE 支持 的 DL CC有 5个， UL CC有 5个，按照编号 DL CC和 UL CC之间——映射， 基站预先配置 UE在 DL CC#1、 DL CC#2和 DL CC#3上接收数据；参见图 8, 该方法包括以下步 4聚： 步骤 802, 基站在 DL CC #3上发送承载非周期触发信令的 DCI Format; 步骤 804, UE在 DL CC #3上接收到非周期触发信令后，触发 DL CC#1、 DL CC#2和 DL CC#3的非周期反馈。 本实例中的非周期触发信令为 1比特， 非周期触发信令表示触发目标下 行分量载波的非周期反馈， 其中， 目标下行分量载波为基站配置给 UE的传 输 PDSCH的所有 DL CC。 本实例中的非周期触发信令位于承载物理上行共享信道的调度信息的 DCI Format 域中。 本实例的 UE接收到非周期触发信令后， 根据配置信息将 DL CC#1、 DL CC#2和 DL CC#3作为需要反馈的 DL CC, 解决了在载波聚合场景下无法确 定需反馈的 DL CC的问题， 且该方法实现简单， 没有增加任何信令开销。 同 时， 有效地减少了不必要反馈的 DL CC的上行反馈， 基站可以根据 UE反馈 的信息调整资源分配， 保证下行数据传输的性能。 实例 5 本实例提供了一种载波聚合场景下非周期反馈的方法， 其中， UE 支持 的 DL CC有 5个， UL CC有 5个，按照编号 DL CC和 UL CC之间——映射， 基站通过高层（ RRC )信令配置 UE在 DL CC#3上接收到非周期触发信令时 触发 DL CC#3和 DL CC#4的非周期反馈； 参见图 9, 该方法包括以下步骤： 步骤 902, 基站在 DL CC #3上发送承载非周期触发信令的 DCI Format; 步骤 904 , UE在 DL CC #3上接收到非周期触发信令后， 触发 DL CC#3 和 DL CC#4的非周期反馈。 本实例中的非周期触发信令为 1比特， 非周期触发信令表示触发目标下 行分量载波的非周期反馈， 其中， 目标下行分量载波由基站通过高层信令配 置。 本实例中的非周期触发信令位于承载物理上行共享信道的调度信息的 DCI Format 域中。 本实例的 UE在 DL CC#3上接收到非周期触发信令后， 居配置信息将 DL CC#3和 DL CC#4作为需要反馈的 DL CC, 解决了在载波聚合场景下无 法确定需反馈的 DL CC的问题，且该方法实现简单，没有增加任何信令开销。 同时， 有效地减少了不必要反馈的 DL CC的上行反馈， 基站可以根据 UE反 馈的信息调整资源分配， 保证下行数据传输的性能。 实例 6 本实例提供了一种载波聚合场景下非周期反馈的方法， 其中， UE 支持 的 DL CC有 5个， UL CC有 5个，按照编号 DL CC和 UL CC之间——映射， 非周期触发信令为 n比特（ n=5 ),每一个比特代表一个 DL CC非周期反馈是 否触发， 1表示触发， 0表示不触发； 参见图 10, 该方法包括以下步骤： 步骤 1002, 基站在 DL CC #3上发送非周期触发信令 00110; 步骤 1004, UE在 DL CC #3上接收到非周期触发信令 00110后， 触发 DL CC#3和 DL CC#4的非周期反馈。 本实例中的非周期触发信令为 n比特，每一个比特代表一个 DL CC非周 期反馈是否触发， 每个比特对应的 DL CC互不相同； 非周期触发信令表示触 发目标下行分量载波的非周期反馈， 其中， 目标下行分量载波由非周期触发 信令确定。 本实例的 UE在 DL CC#3上接收到非周期触发信令 00110后，将 DL CC#3 和 DL CC#4作为需要反馈的 DL CC, 解决了在载波聚合场景下无法确定需 反馈的 DL CC的问题， 且该方法实现简单。 同时， 有效地减少了不必要反馈 的 DL CC的上行反馈， 基站可以根据 UE反馈的信息调整资源分配， 保证下 行数据传输的性能。 实例 7 本实例提供了一种载波聚合场景下非周期反馈的方法， 其中， UE 支持 的 DL CC有 5个， UL CC有 5个，按照编号 DL CC和 UL CC之间 映射， 非周期触发信令为 n比特（n=3 ),表示触发 DL CC的索引和不触发共 6种状 态， 111表示不触发任何 DL CC, 000〜100分别对应触发的 DL CC的索引， 参见图 11 , 该方法包括以下步骤： 步骤 1102, 基站在 DL CC #3上发送非周期触发信令 011 ; 步骤 1104, UE在 DL CC #3上接收到非周期触发信令 011后， 触发 DL
CC#3的非周期反馈。 非周期触发信令表示触发目标下行分量载波的非周期反馈， 其中， 目标 下行分量载波由非周期触发信令确定；本实例中的非周期触发信令为 n比特， 表示是否触发非周期反馈和触发非周期反馈的 DL CC索引。 本实例的 UE接收到非周期触发信令 011后， 将 DL CC#3作为需要反馈 的 DL CC, 解决了在载波聚合场景下无法确定需反馈的 DL CC的问题， 且 该方法实现简单。 同时， 有效地减少了不必要反馈的 DL CC的上行反馈， 基 站可以根据 UE反馈的信息调整资源分配， 保证下行数据传输的性能。 实例 8 本实例提供了一种载波聚合场景下非周期反馈的方法， 其中， 在跨载波 调度时， 非周期触发信令为用作跨载波调度的载波指示信令， 发送非周期反 馈的 PUSCH的 UL CC为高层信令配置； UE支持的 DL CC有 5个， UL CC 有 5个， 非周期触发信令为 n比特（n=3 ), 表示触发 DL CC的索引和不触发 共 6种^! 态， 111表示不触发任何 DL CC, 000-100分别对应触发的 DL CC 的索引，并且，基站配置 UE发送非周期反馈的 PUSCH的 UL CC为 UL CC1 , 则在跨载波调度时， 重用 DCI Format中载波指示信令为非周期触发信令； 参 见图 12, 该方法包括以下步 4聚： 步骤 1202, 基站在 DL CC #3上发送非周期触发信令 011 ; 步骤 1204, UE在 DL CC #3上接收到非周期触发信令 011后， 触发 DL CC#3的非周期反馈。 本实例的 UE接收到非周期触发信令 011后， 将 DL CC#3作为需要反馈 的 DL CC, 解决了在载波聚合场景下无法确定需反馈的 DL CC的问题， 且 该方法实现简单。 同时， 有效地减少了不必要反馈的 DL CC的上行反馈， 基 站可以根据 UE反馈的信息调整资源分配， 保证下行数据传输的性能。 上述实例在跨载波调度不使能时， 系统可以使用实例 1 , 在跨载波调度 使能时， 系统可以使用其它实例； 当 UE在 PUSCH上非周期反馈多个 DL CC的信道情况时，各 DL CC的 信道信息按照频点从高到低或从低到高进行排列， 或者， 各 DL CC的信道信 息按照 DL CC的索引从高到低或从低到高进行排列，将排列后的多个 DL CC 的信道情况通过目标 UL CC上的 PUSCH发送给基站。 以上实例 1-8中 UE支持的 DL CC和 UL CC可以不局限于上述具体个数， 可以根据使用需要配置支持的 DL CC和 UL CC的个数， 这些应用都在本发 明的保护范围内。 从以上的描述中可以看出， 本发明实现了如下技术效果： 本发明实施例 通过隐含映射、 预定义的方式或者信令指示的方式， 来确定非周期反馈触发 时所需要反馈的下行分量载波， 从而保证基站可以灵活的触发下行分量载波 的非周期反馈， 减少上行反馈的浪费， 并保证下行数据传输的性能。 显然， 本领域的技术人员应该明白， 上述的本发明的各模块或各步骤可 以用通用的计算装置来实现， 它们可以集中在单个的计算装置上， 或者分布 在多个计算装置所组成的网络上， 可选地， 它们可以用计算装置可执行的程 序代码来实现， 从而， 可以将它们存储在存储装置中由计算装置来执行， 并 且在某些情况下， 可以以不同于此处的顺序执行所示出或描述的步骤， 或者 将它们分别制作成各个集成电路模块， 或者将它们中的多个模块或步骤制作 成单个集成电路模块来实现。 这样， 本发明不限制于任何特定的硬件和软件 结合。 以上所述仅为本发明的优选实施例而已， 并不用于限制本发明， 对于本 领域的技术人员来说， 本发明可以有各种更改和变化。 凡在本发明的 ^"神和 原则之内， 所作的任何修改、 等同替换、 改进等， 均应包含在本发明的保护 范围之内。

Claims

权 利 要 求 书
1. 一种载波聚合场景下非周期反馈的方法， 其特征在于， 包括以下步骤： 基站向用户设备发送非周期触发信令；
所述用户设备接收所述非周期触发信令， 根据所述非周期触发信令 确定需反馈的下行分量载波 DL CC; 以及
所述用户设备触发确定的 DL CC的非周期反馈。
2. 居权利要求 1所述的方法， 其特征在于， 居所述非周期触发信令确 定需反馈的 DL CC 包括： 所述用户设备将承载所述非周期触发信令的 DL CC确定为需反馈的 DL CC。
3. 根据权利要求 1所述的方法， 其特征在于， 所述用户设备将承载所述非 周期触发信令的 DL CC确定为第一 DL CC; 居所述非周期触发信令确 定需反馈的 DL CC包括： 所述用户设备将在所述第一 DL CC上发送调 度信息的所有 DL CC确定为需反馈的 DL CC。
4. 居权利要求 1所述的方法 ,其特征在于 ,所述用户设备上保存有 DL CC 与上行控制信道 UL CC的对应关系；
才艮据所述非周期触发信令确定需反馈的 DL CC包括：
所述用户设备根据承载所述非周期触发信令的调度信息确定第一 UL CC, 根据保存的 DL CC与 UL CC的对应关系查找所述第一 UL CC 对应的 DL CC, 将查找到的 DL CC确定为需反馈的 DL CC。
5. 根据权利要求 4中所述的方法， 其特征在于， 所述第一 UL CC为发送承 载非周期反馈信息的物理上行共享信道的上行分量载波。
6. 根据权利要求 1所述的方法， 其特征在于， 所述方法还包括： 基站预先 配置所述用户设备在指定的 DL CC上接收数据；
才艮据所述非周期触发信令确定需反馈的 DL CC包括：
当所述用户设备在所述指定的 DL CC中的一个 DL CC上接收所述 非周期触发信令时， 将所述指定的 DL CC确定为需反馈的 DL CC。
7. 根据权利要求 6中所述的方法， 其特征在于， 所述指定的 DL CC为基站 预先配置给所述用户设备具有接收数据能力的所有 DL CC。
8. 根据权利要求 1所述的方法， 其特征在于， 所述方法还包括： 基站预先 通过高层信令配置第一对应关系， 所述第一对应关系为接收非周期触发 信令的 DL CC与需反馈的 DL CC的对应关系；
根据所述非周期触发信令确定需反馈的下行分量载波包括： 所述用 户设备根据所述第一对应关系确定承载所述非周期触发信令的 DL CC 对应的需反馈的 DL CC。
9. 根据权利要求 2-8 中任一项所述的方法， 其特征在于， 所述非周期触发 信令位于承载物理上行共享信道调度信息的下行控制信息格式 DCI Format 域中， 所述非周期触发信令开销为 1比特， 表示是否触发非周期 反馈。
10. 根据权利要求 1所述的方法， 其特征在于， 所述非周期触发信令为 n比 特， n大于 1 ; 所述 n比特中的每个比特对应一个 DL CC, 当比特的值 为指定值时， 表示触发该比特对应的 DL CC非周期反馈；
才艮据所述非周期触发信令确定需反馈的 DL CC包括： 所述用户设备 判断所述 n比特中是否有所述指定值， 如果有， 将所述指定值所在的比 特对应的 DL CC确定为需反馈的 DL CC。
11. 根据权利要求 1所述的方法， 其特征在于， 所述非周期触发信令为 n比 特， n大于 1 ; 所述 n比特的十进制数对应一个 DL CC或不触发非周期 反馈；
才艮据所述非周期触发信令确定需反馈的 DL CC包括： 所述用户设备 将所述 n比特的十进制数对应的 DL CC确定为需反馈的 DL CC。
12. 居权利要求 10或 11所述的方法， 其特征在于， 所述 n的确定方式为 以下之一：
为系统中聚合的最大分量载波数量； 为基站配置给 UE的传输物理 下行共享信道 PDSCH的 DL CC数量； 为基站配置给 UE在一个 DL CC 上调度 DL CC的最大载波数量； 为基站配置给 UE在发送触发非周期信 令的 DL CC上调度 DL CC的最大载波数量。
13. 根据权利要求 10或 11所述的方法， 其特征在于， 在跨载波调度时， 所 述非周期触发信令为用作跨载波调度的载波指示信令。
14. 根据权利要求 13中所述的方法， 其特征在于， 发送承载非周期反馈信息 的物理上行共享信道的上行载波为基站通过高层信令预先定义。
15. 根据权利要求 2-8, 10, 11 中任一项所述的方法， 其特征在于， 所述用 户设备确定需反馈的 DL CC为多个 DL CC; 所述用户设备触发确定的 DL CC的非周期反馈包括：
所述用户设备将所述多个 DL CC 的信道质量信息按照频点的高低 或按照 DL CC的索引的高氐进行排列， 将排列后的多个 DL CC的信道 质量信息发送给所述基站。
16. —种载波聚合场景下非周期反馈的系统， 其特征在于， 包括基站和用户 设备；
所述基站， 用于向所述用户设备发送非周期触发信令； 所述用户设备包括：
接收模块， 用于接收来自所述基站的非周期触发信令； 以及 触发模块， 用于根据所述非周期触发信令确定需反馈的 DL CC, 以 及触发确定的 DL CC的非周期反馈。
PCT/CN2010/076155 2010-04-01 2010-08-19 载波聚合场景下非周期反馈的方法和系统 WO2011120277A1 (zh)

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