CN-113473635-B - Two-cell scheduling for NR operation

CN113473635BCN 113473635 BCN113473635 BCN 113473635BCN-113473635-B

Abstract

The present application relates to two-cell scheduling for novel radio operation. An apparatus for use in a User Equipment (UE) includes a Radio Frequency (RF) interface and a processor circuit coupled to the RF interface that receives Downlink Control Information (DCI) over a Physical Downlink Control Channel (PDCCH) via the RF interface, wherein the DCI is configured to schedule a Physical Downlink Shared Channel (PDSCH) or a Physical Uplink Shared Channel (PUSCH) on two cells, and receives downlink information over the PDSCH or transmits uplink information over the PUSCH over the RF interface on the two cells based on the DCI.

Inventors

LI YINGYANG
XIONG GANG
D'Urberville chatge
Alexei Davidov
HAN CHENGXI

Assignees

英特尔公司
英特尔公司

Dates

Publication Date: 20260421
Application Date: 20210330
Priority Date: 20200331

Claims (20)

1. An apparatus for use in a User Equipment (UE), comprising: radio Frequency (RF) interface, and Processor circuitry coupled to the RF interface, the processor circuitry to: Receiving Downlink Control Information (DCI) on a Physical Downlink Control Channel (PDCCH) via the RF interface, wherein the DCI is configured to schedule a Physical Downlink Shared Channel (PDSCH) or a Physical Uplink Shared Channel (PUSCH) on two cells; Based on the DCI, on the two cells, downlink information is received on the PDSCH or uplink information is transmitted on the PUSCH via the RF interface, Wherein when the DCI is configured to schedule PDSCH on the two cells, the DCI includes a PDSCH-to-harq_feedback timing indicator field indicating a time to transmit HARQ feedback for PDSCH on the two cells, a value of the PDSCH-to-harq_feedback timing indicator field being defined with respect to a last symbol of PDSCH ending later on the two cells.
2. The apparatus of claim 1, wherein the DCI comprises a New Data Indicator (NDI) field and a Redundancy Version (RV) field, the two fields being indicated for each Transport Block (TB), the NDI field indicating whether the TB is retransmitted or first transmitted, the RV field indicating a redundancy version of a coding format for the TB.
3. The apparatus of claim 1, wherein the DCI comprises a Modulation Coding Scheme (MCS) field indicating a modulation order for a PDSCH or PUSCH on one of the two cells and a differential value field indicating a differential value, wherein MCS information for the PDSCH or PUSCH on the other of the two cells is derived based on the differential value in combination with the MCS field.
4. The apparatus of claim 1, wherein the DCI comprises a Transmit Configuration Index (TCI) field indicating one or more transmit configuration states for the two cells, wherein: When a single TCI state is configured for a first value of the TCI field, the TCI state is applied to the two cells, When two TCI states are configured for the second value of the TCI field, the two TCI states are applied to the two cells respectively, When three TCI states are configured for the third value of the TCI field, one of the three TCI states is applied to one of the two cells, and the other two of the three TCI states are applied to the other of the two cells, When four TCI states are configured for the fourth value of the TCI field, two of the four TCI states are applied to one of the two cells and the other two of the four TCI states are applied to the other of the two cells.
5. The apparatus of claim 1, wherein the DCI comprises a bandwidth portion (BWP) indicator field that indicates an active BWP on the two cells according to one or more of the following restrictions: the dormant BWP on one of the two cells is indicated together with the non-dormant BWP on the other of the two cells, A default BWP on one of the two cells is indicated together with a non-default BWP on the other of the two cells, and BWP on the two cells uses the same subcarrier spacing.
6. The apparatus of claim 1, wherein the DCI comprises two frequency-domain resource allocation (FDRA) fields, each FDRA field indicating frequency resources on an active bandwidth portion (BWP) on one of the two cells, and the two FDRA fields are configured to be of a same FDRA type or two different FDRA types.
7. The apparatus of claim 1, wherein the DCI comprises a time-domain resource allocation (TDRA) field indicating time-domain resources on an active bandwidth portion (BWP) on the two cells.
8. The apparatus of claim 1, wherein a default Transmission Configuration Index (TCI) state for a PDSCH on one of the two cells is determined to be one of the following states when a deviation between the DCI and reception of the PDSCH on the one cell is less than a threshold duration or when the DCI does not include a TCI field indicating one or more transmission configuration states for the one cell: an active TCI state with a minimum ID that can be used for PDSCH in an active bandwidth part (BWP) of the one cell, An active TCI state with the smallest ID that can be used for the PDSCH in the active BWP of the reference serving cell, One or more Reference Signals (RSs) for one or more quasi co-located (QCL) parameters for PDCCH quasi co-located indications of control resource sets associated with the monitored search space, the control resource sets being control resource sets having a lowest control resource set ID in a latest time slot of one or more control resource sets in an active BWP of the one cell monitored by the UE, One or more Reference Signals (RSs) for one or more quasi co-located (QCL) parameters for PDCCH quasi co-located indication of a control resource set associated with a monitored search space, the control resource set being a control resource set having a lowest control resource set ID in a latest time slot of one or more control resource sets in an active BWP of a reference serving cell monitored by the UE, and For PDSCH on a scheduling cell transmitting the DCI, an active TCI state with a lowest ID that can be used for PDSCH in an active BWP of the scheduling cell, or for PDSCH on one scheduled cell, for one or more RSs with one or more QCL parameters for PDCCH quasi co-location indication of a control resource set associated with a monitored search space, the control resource set being a control resource set with a lowest control resource set ID in a latest time slot of one or more control resource sets in an active BWP of a serving cell monitored by the UE.
9. The apparatus of claim 1, wherein the processor circuit is further to: HARQ-ACK feedback for PDSCH on the two cells is transmitted via the RF interface based on a transmission mode of PDSCH on the two cells, wherein PDSCH on the two cells is transmitted through transmission based on Transport Blocks (TBs) or transmission based on Code Block Groups (CBGs).
10. The apparatus of claim 9, wherein, for a PDSCH on one of the two cells, whether the TB-based transmission or the CBG-based transmission is applied to the PDSCH through higher layer signaling configuration.
11. The apparatus of claim 9, wherein one Transport Block (TB) scheduled by the DCI is jointly carried on PDSCH or PUSCH on the two cells.
12. The apparatus of claim 11, wherein the DCI includes a counter downlink allocation index (C-DAI) field to indicate a position of HARQ-ACK feedback for PDSCH on the two cells relative to HARQ-ACK feedback for other scheduled PDSCH in a HARQ-ACK codebook.
13. The apparatus of claim 12, wherein the processor circuit is further to: Based on the reference serving cell index, a location in the HARQ-ACK codebook of HARQ-ACK feedback for PDSCH on the two cells is determined.
14. The apparatus of claim 9, wherein one Transport Block (TB) scheduled by the DCI is carried on a PDSCH or PUSCH on one of the two cells.
15. The apparatus of claim 14, wherein the DCI includes a counter downlink allocation index (C-DAI) field to indicate a position of HARQ feedback for PDSCH on the two cells relative to HARQ-ACK feedback for other scheduled PDSCH in a HARQ-ACK codebook.
16. The apparatus of claim 14, wherein the DCI includes a total downlink allocation index (T-DAI) field to indicate a total number of PDCCHs transmitted by a scheduling cell transmitting the DCI until the PDCCH of the DCI is transmitted.
17. The apparatus of claim 14, wherein the DCI comprises two counter downlink allocation index (C-DAI) fields, each C-DAI field indicating a position in a HARQ-ACK codebook of HARQ-ACK feedback for a PDSCH on one of the two cells relative to HARQ-ACK feedback for other scheduled PDSCH.
18. The apparatus of claim 14, wherein the processor circuit is further to: For a PDSCH on one of the two cells, determining a location in a HARQ-ACK codebook of HARQ-ACK feedback for the PDSCH based on a reference serving cell index.
19. The apparatus of claim 14, wherein the processor circuit is further to: Based on a reference serving cell index, determining a position in a HARQ-ACK codebook of HARQ-ACK feedback for PDSCH on the two cells, wherein consecutive HARQ-ACK bits indicating HARQ-ACK feedback for PDSCH on the two cells are located at the position determined based on the reference serving cell index.
20. The apparatus of any one of claims 13, 18, and 19, wherein the reference serving cell index is a lower one of the indexes of the two cells, an index of a scheduling cell transmitting the DCI, or configured by higher layer signaling.

Description

Two-cell scheduling for NR operation Priority claim The present application is based on and claims priority from PCT application PCT/CN 2020/082342 submitted on 31 months of 2020 and PCT application PCT/CN2020/082339 submitted on 31 months of 2020, both of which are incorporated herein by reference in their entirety. Technical Field Embodiments of the present disclosure relate generally to the field of wireless communications, and more particularly to two-cell scheduling for Novel Radio (NR) operations. Background With the development of fourth generation (4G)/Long Term Evolution (LTE) technology, the third generation partnership project (3 GPP) introduced a fifth generation (5G) New Radio (NR) network to provide wider bandwidth, support greater traffic, extremely high reliability, low latency, and the like. Although it is expected that 5G networks will eventually replace 4G networks, there is also a period of coexistence between 5G and 4G systems. The 5G carrier may be a neighbor of the 4G carrier. The 5G carrier may also overlap with the 4G carrier partially or completely in the frequency domain. Therefore, during 5G system deployment, it is important to efficiently support 5G and 4G system coexistence, i.e., dynamic Spectrum Sharing (DSS). Drawings Embodiments of the present disclosure will now be illustrated by way of example, and not by way of limitation, in the figures of the accompanying drawings in which like reference numerals refer to similar elements. Fig. 1 illustrates a flow chart of a method for use in a UE according to some embodiments of the present disclosure. Fig. 2 shows a schematic diagram of RBG sizes for single cell scheduling and RBG sizes for 2 cell scheduling. Fig. 3 shows a schematic diagram of the same time resources on two cells scheduled by a 2-cell scheduling approach. Fig. 4 shows a schematic diagram of an allocation table for TDRA of two cells scheduled by a 2-cell scheduling manner. Fig. 5 shows a schematic diagram of an allocation table for TDRA of two cells scheduled by a 2-cell scheduling manner. Fig. 6 shows a schematic diagram of a dynamic HARQ-ACK codebook in case that TBs are mapped to two cells scheduled by a 2-cell scheduling manner. Fig. 7 shows a schematic diagram of a semi-dynamic HARQ-ACK codebook in case that TBs are mapped to two cells scheduled by a 2-cell scheduling manner. Fig. 8 shows a schematic diagram of a separate HARQ-ACK mapping for each cell scheduled by a 2-cell scheduling approach. Fig. 9 shows a schematic diagram of consecutive HARQ-ACK mapping according to a reference serving cell index. Fig. 10 shows a schematic diagram of consecutive HARQ-ACK mapping according to a reference serving cell index. Fig. 11 illustrates a schematic diagram of a network in accordance with various embodiments of the present disclosure. Fig. 12 illustrates a schematic diagram of a wireless network, according to various embodiments of the present disclosure. Fig. 13 illustrates a block diagram of components capable of reading instructions from a machine-readable or computer-readable medium (e.g., a non-transitory machine-readable storage medium) and performing any one or more of the methods discussed herein, according to some example embodiments of the present disclosure. Detailed Description Various aspects of the illustrative embodiments will be described using terms commonly employed by those skilled in the art to convey the substance of the disclosure to those skilled in the art. However, it will be apparent to those skilled in the art that many alternative embodiments may be implemented using portions of the described aspects. For purposes of explanation, specific numbers, materials, and configurations are set forth in order to provide a thorough understanding of the illustrative embodiments. It will be apparent, however, to one skilled in the art that alternative embodiments may be practiced without these specific details. In other instances, well-known features may be omitted or simplified in order not to obscure the illustrative embodiments. Furthermore, various operations will be described as multiple discrete operations in turn, in a manner that is most helpful in understanding the illustrative embodiments, however, the order of description should not be construed as to imply that these operations are necessarily order dependent. In particular, these operations need not be performed in the order of presentation. The phrases "in an embodiment," "in one embodiment," and "in some embodiments" are repeated herein. These phrases generally do not refer to the same embodiment, however, they may. The terms "comprising," "having," and "including" are synonymous, unless the context dictates otherwise. The phrases "A or B" and "A/B" mean "(A), (B), or (A and B)". DSS has been considered since the NR publication (Rel-15). For example, a cell-specific reference signal (CRS) may be configured for an NR User Equipment (UE) to enable rate matching of transmissions of a downli