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EP-3909177-B1 - ENHANCED SINGLE DOWNLINK CONTROL INFORMATION MULTI-SLOT SCHEDULING

EP3909177B1EP 3909177 B1EP3909177 B1EP 3909177B1EP-3909177-B1

Inventors

  • BALDEMAIR, ROBERT
  • MALEKI, Sina
  • ANDGART, NIKLAS
  • REIAL, ANDRES

Dates

Publication Date
20260506
Application Date
20191209

Claims (13)

  1. A wireless device, WD (22), configured to communicate with a network node (16), the WD (22) comprising a radio interface configured to: receive a downlink control information, DCI, signal in a first slot, the DCI being a single DCI configured to cause the WD (22) to transmit uplink shared channel transmissions in a plurality of slots to the network node (16) and/or receive downlink shared channel transmissions in a plurality of slots from the network node (16), the transmitting and/or receiving being according to a pattern in a plurality of slots, wherein the pattern comprises a gap of at least one slot between successive uplink shared channel transmissions or downlink shared channel receptions; and transmit the uplink shared channel transmissions to the network node (16) and/or receive the downlink shared channel transmissions from the network node (16) according to the pattern, the transmitting and/or receiving of the uplink and/or downlink shared channel transmissions in each slot being in a number of layers indicated by a rank provided by the DCI signal.
  2. The WD (22) of Claim 1, wherein the transmitting or receiving uses different transport blocks, TBs, in each of at least two slots; and wherein different TBs have different hybrid automatic repeat request, HARQ, identifications, and/or different payload content.
  3. The WD (22) of any of Claims 1-2 wherein the pattern is indicated by a control signal from the network node (16) to the WD (22), the control signal being the DCI signal, a radio resource control, RRC, signal or a medium access, MAC, control element, CE, signal; and/or further comprising processing circuitry configured to allocate a first set of like time-frequency resources to each of the uplink shared channel transmissions and allocate a second set of like time-frequency resources to each of the downlink shared channel transmissions; and/or, wherein the DCI signal indicates a first Hybrid Automatic Repeat Request, HARQ, process ID associated with a transport block, TB, of a first of the plurality of slots, and a second HARQ process ID associated with a TB of a second of the plurality of slots, wherein the second HARQ process ID is different than the first.
  4. A method performed by a wireless device, WD (22), configured to communicate with a network node (16), the method comprising: receiving (S154) a downlink control information, DCI, signal in a first slot, the DCI being a single DCI configured to cause the WD (22) to transmit uplink shared channel transmissions in a plurality of slots to the network node (16) and/or receive downlink shared channel transmissions in a plurality of slots from the network node (16), the transmitting and/or receiving being according to a pattern in a plurality of slots, wherein the pattern comprises a gap of at least one slot between successive uplink shared channel transmissions or downlink shared channel receptions; and transmitting (S156) the uplink shared channel transmissions to the network node (16) and/or receive the downlink shared channel transmissions from the network node (16) according to the pattern, the transmitting and/or receiving of the uplink and/or downlink shared channel transmissions in each slot being in a number of layers indicated by a rank provided by the DCI signal.
  5. The method of Claim 4, wherein the transmitting or receiving uses different transport blocks, TBs, in each of at least two slots; and wherein the different TBs have different hybrid automatic repeat request, HARQ, identifications, and/or different payload content.
  6. The method of any of Claims 4-5, wherein the pattern is indicated by a control signal from the network node (16) to the WD (22), the control signal being the DCI signal, a radio resource control, RRC, signal or a medium access, MAC, control element, CE, signal; or, further comprising allocating a first set of like time-frequency resources to each of the uplink shared channel transmissions and allocate a second set of like time-frequency resources to each of the downlink shared channel transmissions; and/or wherein the DCI signal indicates a first Hybrid Automatic Repeat Request, HARQ, process ID associated with a transport block, TB of a first of the plurality of slots, and a second HARQ process ID associated with a TB of a second of the plurality of slots, wherein the second HARQ process ID is different than the first.
  7. A network node (16) configured to communicate with a wireless device, WD (22), the network node (16) comprising processing circuitry configured to: transmit a downlink control information, DCI, signal in a first slot, the DCI being a single DCI configured to cause the WD (22) to transmit uplink shared channel transmissions in a plurality of slots to the network node (16) and/or receive downlink shared channel transmissions in a plurality of slots from the network node (16), the transmitting and/or receiving being according to a pattern in a plurality of slots, wherein the pattern comprises a gap of at least one slot between successive uplink shared channel transmissions or downlink shared channel receptions; and receiving the uplink shared channel transmissions at the network node (16) and/or transmitting the downlink shared channel transmissions from the network node (16) according to the pattern, the receiving and/or transmitting of the uplink and/or downlink shared channel transmissions in each slot being in a number of layers indicated by a rank provided by the DCI signal.
  8. The network node (16) of Claim 7 wherein the processing circuitry is further configured to allocate like time-frequency resources to each of the uplink and/or downlink shared channel transmissions.
  9. The network node (16) of Claim 7 or 8, wherein the processing circuitry is further configured to cause signaling of an indication of the pattern to the WD (22) by one of the DCI signal, a radio resource control, RRC, signal or a medium access, MAC, control element, CE, signal; and/or, wherein the DCI signal indicates a first Hybrid Automatic Repeat Request, HARQ, process ID associated with a transport block, TB of a first of the plurality of slots, and a second HARQ process ID associated with a TB of a second of the plurality of slots, wherein the second HARQ process ID is different than the first.
  10. A method performed by a network node (16) configured to communicate with a wireless device, WD (22), the method comprising: transmitting a downlink control information, DCI, signal in a first slot, the DCI being a single DCI configured to cause the WD (22) to transmit uplink shared channel transmissions in a plurality of slots to the network node (16) and/or receive downlink shared channel transmissions in a plurality of slots from the network node (16), the transmitting and/or receiving being according to a pattern in a plurality of slots, wherein the pattern comprises a gap of at least one slot between successive uplink shared channel transmissions or downlink shared channel receptions; and receiving the uplink shared channel transmissions at the network node (16) and/or transmitting the downlink shared channel transmissions from the network node (16) according to the pattern, the receiving and/or transmitting of the uplink and/or downlink shared channel transmissions in each slot being in a number of layers indicated by a rank provided by the DCI signal.
  11. The method of claim 10 further comprising allocating (S146) like time-frequency resources to each of the uplink and/or downlink shared channel transmissions.
  12. The method of claim 10 or 11, further comprising causing signaling of an indication of the pattern to the WD (22) by one of the DCI signal, a radio resource control, RRC, signal or a medium access, MAC, control element, CE, signal.
  13. The method of any of Claims 10-12 wherein the DCI signal indicates a first Hybrid Automatic Repeat Request, HARQ, process ID associated with a transport block, TB of a first of the plurality of slots, and a second HARQ process ID associated with a TB of a second of the plurality of slots, wherein the second HARQ process ID is different than the first.

Description

FIELD The present disclosure relates to wireless communications, and in particular, to enhanced single downlink control information (DCI), multi-slot scheduling. BACKGROUND The New Radio (NR) standard (also known as 5G) of the Third Generation Partnership Project (3GPP) is being developed to provide service for multiple uses such as for enhanced mobile broadband (eMBB), ultra-reliable low latency communication (URLLC), and machine type communication (MTC). Each of these services has different technical requirements. For example, the general requirement for eMBB is high data rate with moderate latency and moderate coverage, while URLLC service requires a low latency and high reliability transmission but perhaps moderate data rates. One solution for low latency data transmission involves the use of shorter transmission time intervals (TTIs). In NR, in addition to transmission in a slot, a mini-slot transmission is also used to reduce latency. A mini-slot, which is referred to in NR terminology as Type B scheduling, may consist of any number of 1 to 14 orthogonal frequency division multiplexed (OFDM) symbols in the uplink (UL) (i.e., from a wireless device to a base station) and 2, 4 or 7 symbols in the downlink (DL) (i.e., from the base station to the wireless device). This is specified in 3GPP Technical Release, referred to herein as 3GPP Release-15 (Rel-15). It should be noted that the concepts of slot and mini-slot are not specific to a service. Rather, a mini-slot may be used for either eMBB, URLLC, or other services. A downlink physical channel corresponds to a set of resource elements carrying information originating from higher layers and allocated for downlink transmission. The downlink physical channels include: Physical Downlink Shared Channel, PDSCHPhysical Broadcast Channel, PBCHPhysical Downlink Control Channel, PDCCH The PDSCH is the main physical channel used for unicast downlink data transmission. This channel is also used for transmission of random access responses (RAR), certain system information blocks (SIB), and paging information. The PBCH carries the basic system information required by the wireless device (WD) to access the network and to read remaining system information in an SIB denoted as SIB1. The PDCCH is used for transmitting downlink control information (DCI), which includes scheduling decisions required for reception of the PDSCH, and for uplink scheduling grants enabling transmission on the physical uplink shared channel (PUSCH), described below. An uplink physical channel corresponds to a set of resource elements carrying information originating from higher layers and allocated for uplink transmissions. The uplink physical channels include: Physical Uplink Shared Channel, PUSCHPhysical Uplink Control Channel, PUCCHPhysical Random Access Channel, PRACH The PUSCH is the uplink counterpart to the PDSCH. The PUCCH is used by WDs to transmit uplink control information (UCI), including hybrid automatic repeat request (HARQ) acknowledgements, channel state information (CSI) reports, etc. The PRACH is used for random access preamble transmission. FIG. 1 is a diagram of time-frequency resources, from which PUSCH and/or PDSCH resources can be allocated. For example, one resource element may occupy a frequency bandwidth of 15 kilo Hertz and one OFDM symbol, including a cyclic prefix. Different formats of the DCI transmitted on the PDCCH exist. For example, the downlink DCI format 1-0 has the following fields and attributes. Identifier for DCI formats - 1 bit; ∘ The value of this bit field is always set to 1, indicating a DL DCI format;Frequency domain resource assignment - log2NRBDL,BWPNRBDL,BWP+1/2 bits; ∘ NRBDL,BWP is the size of the active DL bandwidth part in case DCI format 1_0 is monitored in the WD specific search space and satisfying the following two conditions: ∘ the total number of different DCI sizes configured to monitor is no more than 4 for the cell; and∘ the total number of different DCI sizes with a cell radio network temporary identifier (C-RNTI) configured to monitor is no more than 3 for the cell. otherwise, NRBDL,BWP is the size of control resource set 0 (CORESET 0);Time domain resource assignment - 4 bits, for example, as defined in Subclause 5.1.2.1 of Technical Standard (TS) 38.214;Virtual to physical resource block (VRB-to-PRB) mapping - 1 bit, for example, according to Table 7.3.1.1.2-33 of 3GPP Rel-15;Modulation and coding scheme (MCS) - 5 bits, for example, as defined in Subclause 5.1.3 of 3GPP Technical Specification (TS) 38.214;New data indicator - 1 bit;Redundancy version - 2 bits, for example, as may defined in certain 3GPP technical specification;Hybrid automatic repeat request (HARQ) process number - 4 bits;Downlink assignment index - 2 bits, for example, as defined in Subclause 9.1.3 of 3GPP TS 38.213, as counter DAI (downlink assignment index);Transmit Power Control (TPC) command for scheduled PUCCH - 2 bits, for example, as defined in Subclause 7.2.