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EP-3777003-B1 - METHOD AND DEVICE FOR TRANSMITTING UPLINK CONTROL INFORMATION

EP3777003B1EP 3777003 B1EP3777003 B1EP 3777003B1EP-3777003-B1

Inventors

  • WANG, YI
  • LI, YINGYANG
  • Zhang, Shichang

Dates

Publication Date
20260506
Application Date
20190507

Claims (12)

  1. A method, performed by a user equipment, UE, for transmitting uplink control information, UCI, the method comprising: detecting (201) a physical downlink control channel, PDCCH, and receiving a physical downlink shared channel, PDSCH, scheduled by the PDCCH; determining (202) hybrid automatic repeat request acknowledgement, HARQ-ACK, information to be fed back and a physical uplink control channel, PUCCH, resource for transmitting the UCI according to a slot length µ DL for a downlink, DL, bandwidth part, BWP, and a slot length µ UL of an uplink, UL, BWP; and transmitting (203) the UCI including the HARQ-ACK information on the PUCCH resource, wherein the determining of the HARQ-ACK information to be fed back comprises determining HARQ-ACK positions for the PDSCH according to a ratio of the slot length µ DL and the slot length µ UL , wherein each of the slot length µ DL and the slot length µ UL corresponds to a subcarrier spacing, SCS, respectively, and wherein one HARQ-ACK position carries HARQ-ACK information of the PDSCH.
  2. The method of claim 1, wherein the determining of the PUCCH resource for transmitting the UCI comprises: in case that the UE receives at least one PDCCH, an ending time of the PDCCH is not later than a time when the UE starts to prepare to feed back the HARQ-ACK information on a first PUCCH resource, and a ACK/NACK Resource Indicator, PRI, field of the PDCCH indicates a second PUCCH resource, determining that the PUCCH resource for transmitting the UCI is the second PUCCH resource; and in case that the UE does not receive the PDCCH indicating the second PUCCH resource before the UE starts to prepare to feed back the HARQ-ACK information on the first PUCCH resource, determining that the PUCCH resource for transmitting the UCI is the first PUCCH resource, wherein the first PUCCH resource and the second PUCCH resource are in a same slot, and a starting Orthogonal Frequency Division Multiplexing, OFDM, symbol of the first PUCCH resource is earlier than a starting OFDM symbol of the second PUCCH resource.
  3. The method of claim 1, wherein in case that a starting Orthogonal Frequency Division Multiplexing, OFDM symbol of a second PUCCH resource is not later than a starting OFDM symbol of a first PUCCH resource, the UE feeds back the HARQ-ACK information on the second PUCCH resource, and wherein the first PUCCH resource and the second PUCCH resource are in a same slot, and the UE first receives a PDCCH indicating the first PUCCH resource and receives a PDCCH indicating the second PUCCH resource later.
  4. The method of claim 1, wherein the determining of the PUCCH resource for transmitting the UCI comprises: for all PDSCHs whose interval between an ending Orthogonal Frequency Division Multiplexing, OFDM, symbol and a starting OFDM symbol of a earliest PUCCH resource is no less than a threshold T , determining that the PUCCH resource for transmitting the UCI is a first PUCCH resource; and for the PDSCHs whose interval between the ending OFDM symbol and the starting OFDM symbol of the earliest PUCCH resource is less than a threshold T , determining that the PUCCH resource for transmitting UCI is a second PUCCH resource, and wherein the first PUCCH resource and the second PUCCH resource are in a same slot.
  5. The method of claim 1, wherein the PDSCH is located on the DL BWP and the PUCCH resource is located on the UL BWP, and wherein the HARQ-ACK information is transmitted in a slot n.
  6. The method of claim 5, wherein in case of the slot length µ UL ≥ the slot length µ DL , for the slot n where the PUCCH resource is located and for a timing value K1 from the PDSCH to a corresponding HAQ-ACK, the HARQ-ACK positions are determined as M slots given by M · (n - K1) + m, wherein m=0,1,...,M-1 of the DL BWP, and wherein, M=µ UL /µ DL .
  7. The method of claim 6, wherein: for each of slots given by M · (n - K1) + m of the DL BWP, the HARQ-ACK positions are determined respectively and cascaded as the HARQ-ACK positions corresponding to the slot n of the UL BWP and the timing value K1; or for each of slots given by M · (n - K1) + m of the DL BWP, the HARQ-ACK positions are determined, and the HARQ-ACK positions corresponding to the slot n of the UL BWP and the timing value K1 are obtained according to a maximum number of slots of the HARQ-ACK positions; or only for a slot M ·( n - K 1)+ q , wherein q =O of the DL BWP, the HARQ-ACK positions are determined as the HARQ-ACK positions corresponding to the slot n of the UL BWP and the timing value K1.
  8. The method of claim 5, wherein in case of the slot length µ UL < the slot length µ DL , only when n-K 1- M +1 is divisible by M, the HARQ-ACK positions are determined for each slot of a slot set K L on the DL BWP, the slot set K L comprising slots ( n-K 1- M +1)/ M, K 1 ∈ K , K is a set of K1, wherein M=µ DL /µ UL, , and wherein K1 is a timing value between a PDSCH reception and a corresponding HARQ-ACK transmission.
  9. The method of claim 5, wherein the determining of the HARQ-ACK positions comprises: in case of µ UL <µ DL , according to a set K of K1, determining that a slot set K D on the DL BWP to be allocated the HARQ-ACK positions is K D = { floor (( n-K 1/ M )}, wherein, K 1 ∈ K ; and determining the HARQ-ACK positions for each slot k d of the slot set K D , wherein, M=µ DL /µ UL , wherein K1 is a timing value between a PDSCH reception and a corresponding HARQ-ACK transmission.
  10. The method of claim 9, wherein: the HARQ-ACK positions are allocated to each slot k d of the slot set K D , according to a slot division of the UL BWP, for the PDSCH whose last OFDM symbol is within the slot M·kd + q, wherein O≤ q < M , even if there is no K1 in the set K such that M·kd + q + K 1 =n, the HARQ-ACK positions are still allocated to this PDSCH; or the HARQ-ACK positions are allocated to each slot k d of the slot set K D , according to the slot division of the UL BWP, for the PDSCH whose last OFDM symbol is within the slot M·kd+q, wherein O≤ q < M only when there is K1 in the set K such that M·kd+q+K 1 =n, the HARQ-ACK positions are allocated to this PDSCH.
  11. The method of claim 5, further comprising: in case of the slot length µ DL > the slot length µ UL , identifying whether a value determined based on n-K1+1 is divisible by M, where M=µ DL /µ UL ., wherein in case of the slot length µ UL ≥ the slot length µ DL , for one timing value K1, the HARQ-ACK positions for the PDSCH are allocated to a plurality of slots of the DL BWP, and wherein K1 is a timing value between a PDSCH reception and a corresponding HARQ-ACK transmission.
  12. A user equipment comprising: a physical downlink control channel, PDCCH, and physical downlink shared channel, PDSCH, receiving module (1701), a hybrid automatic repeat request acknowledgement, HARQ-ACK, information generating and physical uplink control channel, PUCCH, resource determining module (1702), and a HARQ-ACK transmitting module (1703), wherein: the PDCCH and PDSCH receiving module is configured to detect a PDCCH and receive a PDSCH scheduled by the PDCCH; the HARQ-ACK information generating and PUCCH resource determining module is configured to: determine HARQ-ACK information to be fed back and a PUCCH resource for transmitting uplink control information, UCI, according to a slot length µ DL for a downlink, DL, bandwidth part, BWP, and a slot length µ UL for an uplink, UL, BWP, wherein for determining the HARQ-ACK information to be fed back, the HARQ-ACK information generating and PUCCH resource determining module is configured to determine HARQ-ACK positions for the PDSCH according to a ratio of the slot length µ DL and the slot length µ UL ; and the HARQ-ACK transmitting module is configured to transmit the UCI including the HARQ-ACK information on the PUCCH resource, wherein each of the slot length µ DL and the slot length µ UL corresponds to a subcarrier spacing, SCS, respectively, and wherein one HARQ-ACK position carries HARQ-ACK information of the PDSCH.

Description

[Technical Field] The present invention relates to wireless communication system technologies, and in particular, to a method and device for transmitting uplink control information (UCI). [Background Art] To meet the demand for wireless data traffic having increased since deployment of 4G communication systems, efforts have been made to develop an improved 5G or pre-5G communication system. Therefore, the 5G or pre-5G communication system is also called a 'Beyond 4G Network' or a 'Post LTE System'. The 5G communication system is considered to be implemented in higher frequency (mmWave) bands, e.g., 60GHz bands, so as to accomplish higher data rates. To decrease propagation loss of the radio waves and increase the transmission distance, the beamforming, massive multiple-input multiple-output (MIMO), Full Dimensional MIMO (FD-MIMO), array antenna, an analog beam forming, large scale antenna techniques are discussed in 5G communication systems. In addition, in 5G communication systems, development for system network improvement is under way based on advanced small cells, cloud Radio Access Networks (RANs), ultra-dense networks, device-to-device (D2D) communication, wireless backhaul, moving network, cooperative communication, Coordinated Multi-Points (CoMP), reception-end interference cancellation and the like. In the 5G system, Hybrid FSK and QAM Modulation (FQAM) and sliding window superposition coding (SWSC) as an advanced coding modulation (ACM), and filter bank multi carrier (FBMC), non-orthogonal multiple access(NOMA), and sparse code multiple access (SCMA) as an advanced access technology have been developed. The Internet, which is a human centered connectivity network where humans generate and consume information, is now evolving to the Internet of Things (IoT) where distributed entities, such as things, exchange and process information without human intervention. The Internet of Everything (IoE), which is a combination of the IoT technology and the Big Data processing technology through connection with a cloud server, has emerged. As technology elements, such as "sensing technology", "wired/wireless communication and network infrastructure", "service interface technology", and "Security technology" have been demanded for IoT implementation, a sensor network, a Machine-to-Machine (M2M) communication, Machine Type Communication (MTC), and so forth have been recently researched. Such an IoT environment may provide intelligent Internet technology services that create a new value to human life by collecting and analyzing data generated among connected things. IoT may be applied to a variety of fields including smart home, smart building, smart city, smart car or connected cars, smart grid, health care, smart appliances and advanced medical services through convergence and combination between existing Information Technology (IT) and various industrial applications. In line with this, various attempts have been made to apply 5G communication systems to IoT networks. For example, technologies such as a sensor network, Machine Type Communication (MTC), and Machine-to-Machine (M2M) communication may be implemented by beamforming, MIMO, and array antennas. Application of a cloud Radio Access Network (RAN) as the above-described Big Data processing technology may also be considered to be as an example of convergence between the 5G technology and the IoT technology. WO 2017/024539 A relates to the field of wireless communications technologies, and in particular, to a terminal, an access network device, a wireless communications system, and an uplink control information transmission method. In the terminal, a receiving module receives downlink scheduling information of a downlink subframe F(i, j), where a set M of preconfigured downlink subframes in which the downlink subframe F(i, j) is located is divided into N subsets of preconfigured downlink subframes, a bit quantity of a hybrid automatic repeat request-acknowledgement HARQ-ACK that needs to be fed back for each downlink subframe in one subset of preconfigured downlink subframes is a predetermined value, and bit quantities of HARQ-ACKs that need to be fed back for any downlink subframes in different subsets of preconfigured downlink subframes are different; a processing module generates a HARQ-ACK codebook according to a receiving status of downlink data, and generates uplink control information after encoding the HARQ-ACK codebook; and a sending module sends the uplink control information. Therefore, a case in which bit quantities of HARQ-ACKs that need to be fed back for downlink subframes on different to-be-aggregated carriers are different is supported. In an information paper to NTT DOCOMO, INC., entitled "RAN WG's progress on NR WI in the February meeting 2018" and referred to as R2-1804394, submitted to the 3GPP TSG RAN WG2 Meeting #101bis, which took place on 16th - 20th April 2018 in Sanya, China, progress of WI on New Radio Access Technology in the o