WO2019136706A1 - Procédés et systèmes de transmission de canal de commande de liaison montante - Google Patents

Procédés et systèmes de transmission de canal de commande de liaison montante Download PDF

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Publication number
WO2019136706A1
WO2019136706A1 PCT/CN2018/072442 CN2018072442W WO2019136706A1 WO 2019136706 A1 WO2019136706 A1 WO 2019136706A1 CN 2018072442 W CN2018072442 W CN 2018072442W WO 2019136706 A1 WO2019136706 A1 WO 2019136706A1
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Prior art keywords
harq
ack
resources
time resources
type
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PCT/CN2018/072442
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English (en)
Inventor
Xianghui HAN
Shuqiang Xia
Wei Gou
Chunli Liang
Jing Shi
Min Ren
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Zte Corporation
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Priority to PCT/CN2018/072442 priority Critical patent/WO2019136706A1/fr
Publication of WO2019136706A1 publication Critical patent/WO2019136706A1/fr

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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
    • H04L1/1607—Details of the supervisory signal
    • H04L1/1671—Details of the supervisory signal the supervisory signal being transmitted together with control information
    • 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

  • This document generally relates to systems, devices, and techniques for wireless communications.
  • Wireless communication technologies are moving the world toward an increasingly connected and networked society.
  • the rapid growth of wireless communications and advances in technology has led to greater demand for capacity and connectivity.
  • Other aspects, such as energy consumption, device cost, spectral efficiency, and latency are also important to meeting the needs of various communication scenarios.
  • next generation systems and wireless communication techniques need to support much deeper coverage and huge number of connections.
  • Embodiments of the disclosed technology solve several issues related to the transmission of a scheduling request (SR) and a hybrid automatic repeat request (HARQ) acknowledgement (ACK) message.
  • SR scheduling request
  • HARQ hybrid automatic repeat request
  • ACK acknowledgement
  • This is achieved by providing a set of rules that establish priorities between existing parameters and procedures in a variety of situations to improve system performance.
  • this patent document discloses rules for the transmission of the SR and the HARQ-ACK message when their resources either partially or completely overlap, for increasing transmission diversity, and for selecting an appropriate transmission format.
  • a wireless communication method includes determining that a first set of time resources overlaps with a second set of time resources, wherein a first set of resources for a first type of communication comprises the first set of time resources, and wherein a second set of resources for a second type of communication comprises the second set of time resources, and transmitting a signal, wherein the signal excludes at least a portion of the first type of communication based on lengths of the first and second sets of time resources, starting positions of the first and second sets of time resources, or traffic types of the first and second types of communication.
  • a wireless communication method includes determining that a first set of time resources overlaps with a second set of time resources, wherein a first set of resources for a scheduling request (SR) comprises the first set of time resources, and wherein a second set of resources for a hybrid automatic repeat request (HARQ) acknowledgement (ACK) message comprises the second set of time resources, and transmitting a signal comprising at least a portion of the SR or at least a portion of the HARQ-ACK based on a format used on the first and second set of time resources or a type of the SR.
  • SR scheduling request
  • ACK hybrid automatic repeat request acknowledgement
  • a wireless communication method includes determining that a first set of time resources for a scheduling request (SR) overlaps with a second set of time resources for a hybrid automatic repeat request (HARQ) acknowledgement (ACK) message, determining an initial cyclic shift for a transmission of only the HARQ-ACK message, and transmitting the SR and the HARQ-ACK message over a set of transmission resources, wherein the set of transmission resources are based on the initial cyclic shift or a type of the SR.
  • SR scheduling request
  • HARQ hybrid automatic repeat request
  • ACK hybrid automatic repeat request acknowledgement
  • a wireless communication method includes determining that a minimum number of physical resource blocks (PRBs) for at least two physical uplink control channel (PUCCH) formats are the same, wherein at least three PUCCH formats are available, and selecting one of the at least three PUCCH formats based on a rule, wherein the rule is based on a number of symbols, a code rate, or a multiplexing capacity associated with each of the at least three PUCCH formats.
  • PRBs physical resource blocks
  • PUCCH physical uplink control channel
  • the above-described methods are embodied in the form of processor-executable code and stored in a computer-readable program medium.
  • a device that is configured or operable to perform the above-described methods is disclosed.
  • FIG. 1 shows an example of a base station (BS) and user equipment (UE) in wireless communication, in accordance with some embodiments of the presently disclosed technology.
  • BS base station
  • UE user equipment
  • FIG. 2 shows examples of cases where resources for the SR and the HARQ-ACK message partially overlap.
  • FIG. 3 shows another example of a case where resources for the SR and the HARQ-ACK message partially overlap.
  • FIG. 4 shows yet another example of a case where multiple resources for SRs and HARQ-ACK messages partially overlap.
  • FIG. 5 shows an example of a wireless communication method for uplink control channel transmissions.
  • FIG. 6 shows another example of a wireless communication method for uplink control channel transmissions.
  • FIG. 7 shows yet another example of a wireless communication method for uplink control channel transmissions.
  • FIG. 8 shows yet another example of a wireless communication method for uplink control channel transmissions.
  • FIG. 9 is a block diagram representation of a portion of an apparatus that may implement a method or technique described in this patent document.
  • SR scheduling request
  • HARQ hybrid ARQ
  • SR is used by the UE to request resource allocation in the UL so it can send data.
  • HARQ feedback is necessary for the HARQ operation.
  • the feedback is an ACK if the UE recognized data intended for it on the physical downlink shared channel (PDSCH) and the UE did not detect any transmission error on the PDSCH data. It is a NACK if the UE recognized data intended for it on the PDSCH but the UE detected some transmission error on the PDSCH data.
  • PDSCH physical downlink shared channel
  • FIG. 1 shows an example of a wireless communication system that includes a base station (BS) 120 and one or more user equipment (UE) 111, 112 and 113.
  • each of the UEs may transmit uplink control information (UCI) (131, 132, 133) .
  • the UCI may comprise an SR or a HARQ-ACK message.
  • the base station may then transmit control information or data (141, 142, 143) back to the UEs.
  • Embodiment 1 As shown in FIG. 2, four cases are shown in which PUCCH carrying SR partial overlaps with PUCCH transmission of HARQ-ACK in the time domain.
  • the PUCCH symbols for SR transmission fully or partially includes PUCCH symbols for HARQ-ACK transmission, and the starting symbol of PUCCH symbols for HARQ-ACK transmission is later than that of SR transmission.
  • PUCCH symbols for HARQ-ACK transmission fully or partially includes PUCCH symbols for SR transmission, and the starting symbol of PUCCH symbols for SR transmission is later than that of HARQ-ACK transmission.
  • the UE may have the capability and may be configured to transmit both channels, and the UE would transmit both SR and HARQ-ACK using the corresponding configured resources. In other embodiments, the UE may not have this ability and its behavior may be defined in the context of the cases shown in FIG. 2.
  • the transmission with the longer length is dropped, or not transmitted.
  • the HARQ-ACK transmission may be entirely dropped, such that both the HARQ-ACK transmission is not resumed even for the non-overlapping symbols of the HARQ-ACK transmission. If the length of time-domain resources for SR and HARQ-ACK are the same, the one first transmitted has high priority.
  • the UE may drop the one used for enhanced Mobile Broadband (eMBB) transmission if the other transmission is for Ultra-Reliable and Low Latency Communication (URLLC) .
  • eMBB enhanced Mobile Broadband
  • URLLC Ultra-Reliable and Low Latency Communication
  • the priority rules for when the SR transmission partially overlaps with the HARQ-ACK/P-CSI transmission include (1) dropping the transmission with the longer length (if the transmissions have identical lengths, the one transmitted first has a higher priority and will be transmitted) , and (2) dropping the transmission based on the traffic type.
  • URLLC traffic is prioritized over eMBB traffic.
  • the following set of rules may be adopted when dropping the transmission with the lower priority:
  • the UE drops all the symbols of the lower priority transmission.
  • one PUCCH transmission may have more than 1 hops if frequency hopping is enabled.
  • the rule may depend on the UE implementation. For example, the UE shall attempt to drop all the symbols once it notices the collision.
  • the configured PUCCH for the SR transmission is a long PUCCH with frequency hopping is enabled, while the HARQ-ACK message is indicated to be transmitted in a short PUCCH.
  • UE can only transmit positive SR in the first hop (Hop 1) using the corresponding SR resources configured, and drop SR transmission in the second hop (Hop 2) .
  • the UE transmits short PUCCH using the resources configured for HARQ-ACK.
  • the example of FIG. 3 may be implemented using any available PUCCH format.
  • Embodiment 2 when PUCCH symbols for SR transmission partially overlap with HARQ-ACK transmission which is expected to be transmitted using PUCCH format 0, at least one of the rules described in Table 1 may be implemented.
  • PUCCH format 0 is a short PUCCH format based on sequence selection for 1 ⁇ 2 bits HARQ-ACK transmission, i.e., different HARQ-ACK states are carried by different cyclic shift sequences.
  • the cyclic shift sequences configured for HARQ-ACK+SR may be in the same physical resource block (PRB) with the cyclic shift sequences configured for HARQ-ACK only.
  • the configured PUCCH for SR is a PUCCH format 1 (long PUCCH format for 1 ⁇ 2 bits UCI) .
  • PUCCH format 1 is a long PUCCH format based on sequence modulation for 1 ⁇ 2 bits HARQ-ACK transmission.
  • at least one of the rules described in Table 2 may be implemented.
  • the configured PUCCH for SR is a PUCCH format 0.
  • Embodiment 3 when the configured PUCCH symbols for a SR transmission partially overlaps with HARQ-ACK transmission, and is expected to be transmitted using short PUCCH format 2 carrying more than 2 bits.
  • the SR is used for triggering eMBB traffic and the short PUCCH is used for the feedback of one or multiple downlink (DL) URLLC transmissions.
  • DL downlink
  • a single SR bit is jointly coded with HARQ-ACK bits and to be transmitted using HARQ-ACK resources.
  • the following rule when the configured PUCCH symbols for a SR transmission partially overlaps with HARQ-ACK transmission, and is expected to be transmitted using long PUCCH format 3/4 carrying more than 2 bits, the following rule is used:
  • a single SR bit is jointly coded with HARQ-ACK bits and to be transmitted using HARQ-ACK resources. Or HARQ-ACK transmission is dropped, and SR is transmitted on the configured SR resources.
  • Embodiment 4 As shown in Case 1-2 in FIG. 4, PUCCH symbols for SR transmission overlaps with multiple HARQ-ACK transmission.
  • the UE may use the rules defined in the context of Embodiment 1 and/or Embodiment 2.
  • a single SR bit is jointly coded with HARQ-ACK bits in each HARQ-ACK transmission occasions that having collision with SR transmission, or a single SR bit is jointly coded with HARQ-ACK bits only in the first HARQ-ACK transmission occasion that having collision with SR transmission.
  • each HARQ-ACK in each HARQ-ACK transmission occasion is transmitted on its overlapping symbols using SR resources.
  • the SR resources includes resources both in the time, frequency and code domain.
  • HARQ-ACK is BPSK or QPSK modulated for one or two bits HARQ-ACK respectively.
  • HARQ-ACK and SR are transmitted using resources configured for HARQ-ACK+SR.
  • PUCCH symbols for HARQ-ACK transmission overlaps with multiple SR transmission occasions.
  • the UE may use the rules defined in the context of Embodiment 1 and/or Embodiment 2.
  • HARQ-ACK if HARQ-ACK is expected to be transmitted in PUCCH format with more than 2 bits, a single SR bit corresponding to the first SR occasion is jointly coded with HARQ-ACK bits, or all SR bits corresponding to each SR occasion are jointly coded with HARQ-ACK bits, or only the SR occasion corresponding to high priority is regarded as one bit and jointly coded with HARQ-ACK bits.
  • the priority here could be a URLLC traffic.
  • the coded bits are transmitted using HARQ-ACK resources.
  • each HARQ-ACK in each HARQ-ACK transmission occasion is transmitted on its overlapping symbols using SR resources.
  • the SR resources includes resources both in the time, frequency and code domain.
  • HARQ-ACK is BPSK or QPSK modulated for one or two bits HARQ-ACK respectively.
  • HARQ-ACK and SR are transmitted using resources configured for HARQ-ACK+SR.
  • the HARQ-ACK message may also be a periodic CSI (P-CSI) message.
  • P-CSI periodic CSI
  • the disclosed embodiments also apply to partially overlapped transmission of SR and periodic/semi-static CSI in PUCCH.
  • periodic/semi-static CSI can only be carried in PUCCH formats for more than 2 bits UCI, e.g., PUCCH format 2, or, PUCCH format 3 or PUCCH format 4.
  • the SR may also be a periodic CSI (P-CSI) message.
  • P-CSI periodic CSI
  • the disclosed embodiments also apply to partially overlapped transmission of HARQ-ACK and periodic/semi-static in PUCCH.
  • UE is not configured the simultaneous transmission of HARQ-ACK and periodic/semi-static.
  • HARQ-ACK and P-CSI are jointly coded and transmitted using the configured HARQ-ACK resources or periodic/semi-static resources.
  • the disclosed embodiments also apply to the partial overlap of PUCCH and physical uplink shared channel (PUSCH) .
  • PUSCH physical uplink shared channel
  • UE is not expected to transmit a SR partially overlaps with a HARQ-ACK transmission in the time domain.
  • a SR transmission from a UE is not expected to have a partial overlap time resource with a HARQ-ACK transmission from the UE. That is, the time resource of a SR transmission and a HARQ-ACK transmission are either exactly the same or time-division multiplexed (TDMed) .
  • UE is not expected to transmit a SR partially overlaps with a HARQ-ACK transmission in time domain, wherein the HARQ-ACK is carried on some of PUCCH formats, e.g., PUCCH Formats for more than 2 bits, or PUCCH format 1 and PUCCH Formats for more than 2 bits.
  • PUCCH formats e.g., PUCCH Formats for more than 2 bits, or PUCCH format 1 and PUCCH Formats for more than 2 bits.
  • UE is not expected to transmit a SR partially overlaps with a periodic CSI transmission in PUCCH, or aperiodic CSI transmission in PUCCH, or aperiodic CSI transmission in PUSCH.
  • UE is not expected to transmit HARQ-ACK partially overlaps with a periodic/semi-static CSI transmission in PUCCH, or aperiodic CSI transmission in PUCCH, or aperiodic CSI transmission in PUSCH.
  • UE is not expected to transmit a SR partially overlaps with a HARQ-ACK transmission in time domain, wherein, the time resources of SR transmission and HARQ-ACK transmission both contain more than 4 symbols (long duration) or both contain no more than 2 symbols (short duration) .
  • UE is not expected to transmit a SR partially overlaps with a HARQ-ACK transmission in time domain, wherein, the time resource of SR transmission contains more than 4 symbols (long duration) and the time resource of HARQ-ACK transmission contains no more than 2 symbols (short duration) ; Or the time resource of HARQ-ACK transmission contains more than 4 symbols (long duration) and the time resource of SR transmission contains no more than 2 symbols (short duration) .
  • HARQ-ACK are transmitted on the PRB for HARQ-ACK only transmission.
  • the mapping of ACK and NACK to cyclic shifts is based on the index of initial cyclic shift of the HARQ-ACK only (CS initial ) and a fixed mapping pattern as given in Table 3 and Table 4 below corresponding to 1-and 2-bit HARQ-ACK, respectively.
  • Table 3 Mapping pattern for 1-bit HARQ-ACK and positive SR
  • Table 4 Mapping pattern for 2-bit HARQ-ACK and positive SR
  • a maximum of 12 SR per PRB can be configured with semi-static SR simultaneously.
  • one PRB can support simultaneous transmission of 2-bit HARQ-ACK with SR only for one UE, and the four remaining resources can be used for other purposes (e.g., 1-bit A/N with SR or 2-bit A/N only) .
  • the cyclic shifts used for transmission of positive SR and HARQ-ACK using PUCCH format 0 could be in N PRBs, where N, for example, is 2. In some embodiments, one PRB is used for HARQ-ACK only transmission, and one PRB is used for transmission of HARQ-ACK and positive SR.
  • two PRBs are used for the combination of SR and HARQ-ACK.
  • the cyclic shifts for the transmission of ‘NACK, NACK’ and negative SR, or ‘NACK, ACK’ and negative SR, or ‘NACK, NACK’ and positive SR, or ‘NACK, ACK’ and positive SR are allocated in one PRB
  • the cyclic shifts for the transmission of ‘ACK, ACK’ and negative SR, or ‘ACK, NACK’ and negative SR, or ‘ACK, ACK’ and positive SR, or ‘ACK, NACK’ and positive SR are allocated in another PRB.
  • Table 5 and Table 6 give two options as a detailed example for 2-bit HARQ-ACK and SR transmission.
  • the cyclic shifts used for transmission of positive SR and 1-bit HARQ-ACK using PUCCH format 0 are in one PRB, and the cyclic shifts used for transmission of positive SR and 2-bit HARQ-ACK using PUCCH format 0 are in more than 1 PRB.
  • RB#i the PRB used for HARQ-ACK only transmission indicated by network as RB#i.
  • the other PRB denoting as RB#j used for transmission of HARQ-ACK and positive SR is implicitly indicated by RB#i.
  • j i + offset_value.
  • j N-1-i, where N is the number of PRBs in the bandwidth part.
  • offset_value is a function of CS intitial , which is the initial cyclic shift configured for HARQ-ACK only.
  • the PRB denoting as RB#j used for transmission of HARQ-ACK and positive SR is the same RB configured for SR-only transmission (denoting as RB#k) , or is implicitly indicated by RB#k.
  • j k + CS intitial + offset_value2, where CS intitial is the initial cyclic shift configured for HARQ-ACK only.
  • the PRB denoting as RB#j used for transmission of HARQ-ACK and positive SR is configured by RRC signaling.
  • the cyclic shifts for HARQ-ACK and positive SR in RB#j could be the same as the cyclic shifts configured for HARQ-ACK only, or are implicitly indicated by the initial cyclic shift configured for HARQ-ACK only, or the initial cyclic shift in RB#j is configured by RRC signaling, or are implicitly indicated by the cyclic shift configured for SR only.
  • a triggering condition of allowing positive SR and 1/2 bits HARQ-ACK to be transmitted in more than one RBs could be determined by the index of one or more resources in a configured PUCCH resource set.
  • the resource here includes CS intitial , the initial cyclic shift configured for HARQ-ACK only.
  • the configured CS intitial is a value ranging 0 ⁇ M
  • only one PRB is used for HARQ-ACK only and HARQ-ACK + SR
  • the configured CS intitial is a value ranging M+1 ⁇ N
  • more than one PRBs are used for HARQ-ACK only and HARQ-ACK + SR, transmission respectively.
  • the triggering condition between using one or more than one PRB depends on whether the value of CS initial is odd or even. In yet another example, the triggering condition between using one or more than one PRB depends on whether the initial PRB index or the starting symbol index is odd or even.
  • Table 5 Mapping pattern for 2-bit HARQ-ACK and SR in PRB#i
  • Table 6 Mapping pattern for 2-bit HARQ-ACK and SR in PRB#j
  • the cyclic shift for ACK and positive SR is implicitly indicated by the initial cyclic shift for HARQ-ACK only.
  • the resource for NACK and positive SR is the same as the resource configured for SR-only.
  • the cyclic shifts for ‘NACK, ACK’ and positive SR, ‘ACK, NACK’ and positive SR, and ‘ACK, ACK’ and positive SR are implicitly indicated by the initial cyclic shift for HARQ-ACK only.
  • the resource for ‘NACK, NACK’ and positive SR is the same as the resource configured for SR-only.
  • PUCCH format 0 is a format based on sequence selection. For 1-bit HARQ-ACK transmission, 2 cyclic shifts are needed, while 4 cyclic shifts are required for 2-bit HARQ-ACK transmission. When the number of transmitter ports increases, the number of resources would be exponentially increased if using orthogonal resources for different ports.
  • the cyclic shift distance between ACK and NACK is the largest, i.e., N/2 on each antenna port.
  • the cyclic shift distance for a specific HARQ-ACK state is the largest i.e., N/2 between different antenna ports. But for both Option 1 and Option 2, the cyclic shift between ACK and NACK is 3 among two ports.
  • the cyclic shift between ACK and NACK is 5 among two ports.
  • Option 3 may have a better performance in large delay spread channel.
  • the cyclic shift between ACK and NACK is 6 among two ports. But the transmission diversity is lost.
  • the cyclic shift distance between ACK and NACK is the largest, i.e., N/2 on each antenna port.
  • the cyclic shift distance for a specific HARQ-ACK state is the largest i.e., N/4 among different antenna ports. But for both Option 1 and Option 2, the cyclic shift between ACK and NACK is 1 among four ports.
  • the cyclic shift between ACK and NACK is 3 among four ports.
  • Option 3 may have a better performance in large delay spread channel.
  • the cyclic shift between ACK and NACK is 5 among two ports. But partial transmission diversity is lost.
  • cyclic shift m is indicated by RRC.
  • Q is the number of transmission ports for PUCCH.
  • the minimum CS distance in each group is 1, while the minimum CS distance is 6 for a specific antenna port among different groups.
  • P is the number of transmission ports for PUCCH
  • the minimum CS distance in each group is 6, while the minimum CS distance 1 among different groups.
  • the cyclic shift in each group is in the same PRB, if the number of cyclic shifts in each group is no more than X. X is 4 or 8. Otherwise, the cyclic shift in each group could be distributed in different PRBs.
  • the value in each entry can be shifted by a same offset. For example, assuming the value in an entry is a, it can be shifted by mod (a+offset, 12) .
  • divide a sequence into N parts, where N is the number of antenna ports. UE transmits one unique part out of the N parts on each antenna ports. For example, if N 2, one part is the even points of the sequence, and another part is the odd points of the sequence, or one part is the points of the sequence indexing from 0 ⁇ 5, and another part is the odd points of the sequence, indexing from 6 ⁇ 11.
  • Embodiments with 2-bit HARQ-ACK Embodiments with 2-bit HARQ-ACK.
  • P is the number of transmission ports for PUCCH
  • Q is the number of transmission ports for PUCCH.
  • the CS in the first two groups are in the first PRB
  • the CS in the last two groups are in the second PRB.
  • P is the number of transmission ports for PUCCH
  • the CS in the first two groups are in the first PRB
  • the CS in the last two groups are in the second PRB.
  • the CS in the first three groups are in the first PRB
  • the CS in the last groups are in the second PRB.
  • the two HARQ-ACK is bundled to one bit.
  • the bundled one bit HARQ-ACK is transmitted using the same CS configuration for 1-bit HARQ-ACK transmission with 2 or 4 transmitting antenna ports respectively, as shown in Table 7 and Table 8.
  • Embodiments with 1-bit HARQ-ACK + SR Embodiments with 1-bit HARQ-ACK + SR.
  • the two bits ‘00’ , ’01’ , ‘11’ , or ’10’ corresponds to ‘NACK, negative SR’ , ‘NACK, positive SR’ , ‘ACK, positive SR’ , or ‘ACK, negative SR’ respectively.
  • one of the options shown in Table 9 can also be used for 1-bit HARQ-ACK and SR transmission using two ports, by re-interpreting the two bits HARQ-ACK to 1-bit HARQ-ACK and SR transmission.
  • the options shown in Table 11 can also be used for 2-bit HARQ-ACK transmission using two ports, by re-interpreting the 1-bit HARQ-ACK and SR transmission to two bits HARQ-ACK.
  • the two bits ‘00’ , ’01’ , ‘11’ , or ’10’ corresponds to ‘NACK, negative SR’ , ‘NACK, positive SR’ , ‘ACK, positive SR’ , or ‘ACK, negative SR’ respectively.
  • one of the options shown in Table 10 can also be used for 1-bit HARQ-ACK and SR transmission using 4 ports, by re-interpreting the two bits HARQ-ACK to 1-bit HARQ-ACK and SR transmission.
  • the options shown in Table 12 can also be used for 2-bit HARQ-ACK transmission using four ports, by re-interpreting the 1-bit HARQ-ACK and SR transmission to two bits HARQ-ACK.
  • Embodiments with 2-bit HARQ-ACK + SR For negative SR and 2-bit HARQ-ACK transmission with 2 transmitting antenna ports, HARQ-ACK is transmitted using the same CS configuration for 2-bit HARQ-ACK only transmission with 2 transmitting antenna ports in one PRB. For positive SR and 2-bit HARQ-ACK transmission with 2 transmitting antenna ports, HARQ-ACK is transmitted using the same CS configuration for 2-bit HARQ-ACK only transmission with 2 transmitting antenna ports in another PRB.
  • the 2-bit HARQ-ACK is bundled to one bit. Then, for SR and 2-bit HARQ-ACK transmission with 2 transmitting antenna ports, the bundled 1-bit HARQ-ACK is transmitted using the same CS configuration for 1-bit HARQ-ACK and SR only transmission with 2 transmitting antenna ports.
  • the two HARQ-ACK is bundled to one bit. Then, for negative SR and 2-bit HARQ-ACK transmission with 4 transmitting antenna ports, the bundled one bit HARQ-ACK is transmitted using the same CS configuration for 1-bit HARQ-ACK only transmission with 4 transmitting antenna ports in one PRB. For positive SR and 2-bit HARQ-ACK transmission with 4 transmitting antenna ports, the bundled one bit HARQ-ACK is transmitted using the same CS configuration for 1-bit HARQ-ACK only transmission with 4 transmitting antenna ports in another PRB. Or, for SR and 2-bit HARQ-ACK transmission with 4 transmitting antenna ports, the bundled one bit HARQ-ACK is transmitted using the same CS configuration for 1-bit HARQ-ACK and SR only transmission with 4 transmitting antenna ports.
  • rules should be specified for UE to pick up one PUCCH format. For example, if a UE has periodic/semi-persistent CSI reports and HARQ-ACK/SR to transmit in a PUCCH and the UE does not determine a PUCCH format 2 or 3 or 4 to transmit HARQ-ACK/SR and the UE is configured to transmit periodic/semi-persistent CSI report (s) in a PUCCH using PUCCH format 2 or PUCCH format 3 or PUCCH format 4, respectively, and
  • PUCCH-F2-simultaneous-HARQ-ACK-CSI TRUE
  • PUCCH-F3-simultaneous-HARQ-ACK-CSI TRUE
  • PUCCH-F4-simultaneous-HARQ-ACK-CSI respectively.
  • the rule/procedure disclosed in Table 13 may be implemented.
  • an additional rule may be defined.
  • UE uses the following priority rule to select a PUCCH format: Format 4> Format 3> Format 2 if at least two of the three formats has a same minimum number of PRBs.
  • the reason is PUCCH format 4 is a format with long duration which may satisfy the coverage and have multiplexing capacity.
  • PUCCH format 3 is a long PUCCH format without multiplexing capacity.
  • PUCCH format 2 is short PUCCH.
  • the priority rule could be Format 3> Format 4> Format 2, or Format 3> Format 2> Format 4.
  • UE uses the following priority rule to select the PUCCH format: Format 2> Format 4> Format 3 if at least two of the three formats has a same minimum number of PRBs. This is to save more resources.
  • UE uses a PUCCH format has the largest or smallest number of symbols in the time domain. In some embodiments, if the number of symbols of PUCCH format 3 and format 4 are the same, UE uses PUCCH format 4 for the transmission. In some embodiments, if the number of symbols of PUCCH format 3 and format 4 are the same, UE uses PUCCH format 3 for the transmission.
  • UE uses a PUCCH format has the lowest code rate. If at least two PUCCH formats still has the same code rate, UE selects a PUCCH format by an order of: Format 4> Format 3> Format 2, or Format 2> Format 4> Format 3.
  • the priority is based on PUCCH format index, i.e., Format 4> Format 3> Format 2 or Format 2> Format 3> Format 4.
  • the priority is based on one or more physical resource, where at least includes one or more of the following: a smallest or largest RB index, a smallest or largest starting index, the number of symbols in time domain.
  • the PUCCH-resource-set-size may be defined as the number of resources in a resource set configured to a UE.
  • the network uses an 2-bit PUCCH resource indicator field to further indicate at least one PUCCH resource to the UE.
  • the UE determines a PUCCH resource from the two PUCCH resources through a mapping function.
  • One feature of introducing implicit mapping is to enable more alternatives within a resource set while not increasing the ARI overhead.
  • the selection within a subset would not be always fully controlled by gNB. Therefore, the N resources within a subset better to have a same format. Otherwise, mismatch of required PUCCH format and actual transmitted format would occur.
  • the N resources are not allowed to be configured as one for PUCCH Format 0 and another for PUCCH Format 3.
  • the N resources within a subset correspond to a same PUCCH format. In some embodiments, the N resources within a subset correspond to a same PUCCH format with the same duration in the time domain. In some embodiments, the N resources within a subset all correspond to a long PUCCH or all correspond to a short PUCCH. In some embodiments, the N resources within a subset all correspond to a PUCCH for up to 2 bits UCI or all correspond to a PUCCH for more than 2 bits UCI.
  • mapping function is given as,
  • n CCE and L is the lowest CCE index and aggregation level of the DL assignment in slot n s , respectively.
  • c (i) is a pseudo-random function and initialized by a configured ID.
  • the mapping function depends on at least one or more following parameters: CCE index control channel element (CCE) index, control resource set (CORESET) index, aggregation level (AL) , a pseudo-random function which initialized by a configured ID and the number of N.
  • CCE index control channel element CCE
  • CORESET control resource set
  • A aggregation level
  • the mapping function could be one or more following equations.
  • n CORESET is the index of the corresponding DL control resource set.
  • n CCE is the lowest CCE index of corresponding DL control channel, L is the aggregation level of DL control channel.
  • n cs (n s , l) is a function of slot index n s and symbol index l.
  • the mapping function is different for different PUCCH formats.
  • the mapping function could at least be determined one of the following factors, control channel element (CCE) index, control resource set (CORESET) index, aggregation level (AL) , and the number of N.
  • CCE control channel element
  • CORESET control resource set
  • AL aggregation level
  • the mapping function could at least be determined one of the following factors, slot index and starting symbol index.
  • the mapping function is different for different PUCCH formats.
  • the mapping function of PUCCH formats with less than 2 bits is different from formats with more than 2 bits.
  • UE determines a PUCCH resource from the two PUCCH resources depending on the state of the first bit for PUCCH formats with less than 2 bits. This may be beneficial to the HARQ-ACK state randomization.
  • the mapping function is different for different PUCCH formats.
  • the mapping function of PUCCH formats with different duration is different.
  • UE determines a PUCCH resource from the two PUCCH resources depending on the state of the number of symbols. In some embodiments, UE would use the first resource if the number of PUCCH length is even, and use the second resource if the number of PUCCH length is odd. This may be beneficial to UE multiplexing.
  • FIG. 5 shows an example of a wireless communication method for uplink control channel transmissions.
  • the method 500 includes, at step 510, determining that a first set of time resources overlaps with a second set of time resources, wherein a first set of resources for a first type of communication comprises the first set of time resources, and wherein a second set of resources for a second type of communication comprises the second set of time resources.
  • the method includes, at step 520, transmitting a signal, wherein the signal excludes at least a portion of the first type of communication based on lengths of the first and second sets of time resources, starting positions of the first and second sets of time resources, or traffic types of the first and second types of communication.
  • the selective transmission of at least a portion of a first type of communication or at least a portion of a second type of communication may be based on lengths of the first and second sets of time resources, starting positions of the first and second sets of time resources, or traffic types of the first and second types of communication.
  • the method 500 may be implemented in scenarios described in the context of FIGS. 2, 3 and 4, and in the “SR Transmission Partially Overlaps With HARQ ACK/P-CSI Transmission” section described in this patent document.
  • FIG. 6 shows an example of a wireless communication method carried out on a wireless communication apparatus (or user equipment) , in accordance with some embodiments of the presently disclosed technology.
  • This example may include some features and/or steps that are similar to those shown in FIG. 5, and described in this document. At least some of these features and/or components may not be separately described in this section.
  • the method 600 includes, at step 610, determining that a first set of time resources overlaps with a second set of time resources, wherein a first set of resources for a scheduling request (SR) comprises the first set of time resources, and wherein a second set of resources for a hybrid automatic repeat request (HARQ) acknowledgement (ACK) message comprises the second set of time resources.
  • SR scheduling request
  • HARQ hybrid automatic repeat request acknowledgement
  • the method 600 includes, at step 620, transmitting a signal comprising at least a portion of the SR or at least a portion of the HARQ-ACK based on a format used on the first and second set of time resources or a type of the SR.
  • the method 600 may be implemented in scenarios disclosed in the context of FIGS. 2, 3 and 4, and in the “SR Transmission Partially Overlaps With HARQ ACK/P-CSI Transmission” section described in this patent document.
  • FIG. 7 shows an example of a wireless communication method carried out on a wireless communication apparatus (or user equipment) , in accordance with some embodiments of the presently disclosed technology.
  • This example may include some features and/or steps that are similar to those shown in FIGS. 5 and 6, and described in this document. At least some of these features and/or components may not be separately described in this section.
  • the method 700 includes, at step 710, determining that a first set of time resources for a scheduling request (SR) overlaps with a second set of time resources for a hybrid automatic repeat request (HARQ) acknowledgement (ACK) message.
  • SR scheduling request
  • HARQ hybrid automatic repeat request acknowledgement
  • the method 700 includes, at step 720, determining an initial cyclic shift for a transmission of only the HARQ-ACK message.
  • the method 700 includes, at step 730, transmitting the SR and the HARQ-ACK message over a set of transmission resources, wherein the set of transmission resources are based on the initial cyclic shift or a type of the SR.
  • the method 700 may be implemented in scenarios disclosed in the “Simultaneous Transmission of SR and HARQ ACK” section described in this patent document.
  • FIG. 8 shows an example of a wireless communication method carried out on a wireless communication apparatus (or user equipment) , in accordance with some embodiments of the presently disclosed technology.
  • This example may include some features and/or steps that are similar to those shown in FIGS. 5, 6 and 7, and described in this document. At least some of these features and/or components may not be separately described in this section.
  • the method 800 includes, at step 810, determining that a minimum number of physical resource blocks (PRBs) for at least two physical uplink control channel (PUCCH) formats are the same, wherein at least three PUCCH formats are available.
  • PRBs physical resource blocks
  • PUCCH physical uplink control channel
  • the method 800 includes, at step 820, selecting one of the at least three PUCCH formats based on a rule, wherein the rule is based on a number of symbols, a code rate, or a multiplexing capacity associated with each of the at least three PUCCH formats.
  • the method 800 may be implemented in scenarios disclosed in the “PUCCH Format Selection for UCI” section described in this patent document.
  • FIG. 9 is a block diagram of an example apparatus that may implement a method or technique described in this documents (e.g., methods 500, 600, 700 or 800) .
  • a apparatus 905 such as a base station or a wireless device (or UE) , can include processor electronics 910 such as a microprocessor that implements one or more of the techniques presented in this document.
  • the apparatus 905 can include transceiver electronics 915 to send and/or receive wireless signals over one or more communication interfaces such as antenna (s) 920.
  • the apparatus 905 can include other communication interfaces for transmitting and receiving data.
  • Apparatus 905 can include one or more memories (not explicitly shown) configured to store information such as data and/or instructions.
  • the processor electronics 910 can include at least a portion of the transceiver electronics 915. In some embodiments, at least some of the disclosed techniques, modules or functions are implemented using the apparatus 905.
  • a computer-readable medium may include removable and non-removable storage devices including, but not limited to, Read Only Memory (ROM) , Random Access Memory (RAM) , compact discs (CDs) , digital versatile discs (DVD) , etc. Therefore, the computer-readable media can include a non-transitory storage media.
  • program modules may include routines, programs, objects, components, data structures, etc., that perform particular tasks or implement particular abstract data types.
  • Computer-or processor-executable instructions, associated data structures, and program modules represent examples of program code for executing steps of the methods disclosed herein. The particular sequence of such executable instructions or associated data structures represents examples of corresponding acts for implementing the functions described in such steps or processes.
  • a hardware circuit implementation can include discrete analog and/or digital components that are, for example, integrated as part of a printed circuit board.
  • the disclosed components or modules can be implemented as an Application Specific Integrated Circuit (ASIC) and/or as a Field Programmable Gate Array (FPGA) device.
  • ASIC Application Specific Integrated Circuit
  • FPGA Field Programmable Gate Array
  • DSP digital signal processor
  • the various components or sub-components within each module may be implemented in software, hardware or firmware.
  • the connectivity between the modules and/or components within the modules may be provided using any one of the connectivity methods and media that is known in the art, including, but not limited to, communications over the Internet, wired, or wireless networks using the appropriate protocols.

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  • Engineering & Computer Science (AREA)
  • Computer Networks & Wireless Communication (AREA)
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Abstract

L'invention concerne des procédés, des systèmes et des dispositifs pour des transmissions de canal de commande de liaison montante améliorées. Dans certains modes de réalisation, la technologie de l'invention fournit des règles pour transmettre sélectivement au moins une partie d'une requête de planification (SR) ou au moins une partie d'un message d'accusé de réception (ACK) de demande de répétition automatique hybride (HARQ) lorsque leurs ressources temporelles se chevauchent. Dans un exemple, la transmission sélective est basée sur les longueurs de leurs ressources temporelles, des positions de départ de leurs ressources temporelles ou de leurs types de trafic. Dans d'autres modes de réalisation, des règles sont fournies pour augmenter la diversité de transmission, et pour sélectionner un format de canal de commande de liaison montante physique (PUCCH) lorsqu'au moins trois formats de PUCCH sont disponibles et qu'un nombre minimum de blocs de ressources physiques (PRB) pour au moins deux formats de canal de commande de liaison montante physique (PUCCH) sont les mêmes.
PCT/CN2018/072442 2018-01-12 2018-01-12 Procédés et systèmes de transmission de canal de commande de liaison montante WO2019136706A1 (fr)

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