US-12621091-B2 - Method and apparatus for transmitting physical downlink shared channel, and readable storage medium

Abstract

A method for transmitting physical downlink shared channel (PDSCH) includes: sending, by a network device based on a frequency hopping rule and multiple available downlink (DL) resource block (RB) sets in a DL bandwidth pad (BWP), multiple PDSCHs scheduled by downlink control information (DCI) in a first format to a user equipment (UE).

Inventors

• Ting Fu

Assignees

• BEIJING XIAOMI MOBILE SOFTWARE CO., LTD.

Dates

Publication Date

20260505

Application Date

20210329

Claims (14)

1. 1 . A method for transmitting physical downlink shared channel (PDSCH), comprising: sending, by a network device, downlink control information (DCI) in a first format to a user equipment (UE), wherein the DCI in the first format comprises first indication information, and the first indication information is configured to indicate an index of a DL RB set where a headmost PDSCH, in multiple PDSCHs scheduled by the DCI in the first format, is located; and sending, by the network device based on a frequency hopping rule and multiple available downlink (DL) resource block (RB) sets in a DL bandwidth part (BWP), the multiple PDSCHs scheduled by the DCI in the first format to the UE; wherein the frequency hopping rule comprises: determining, according to the first indication information and a cyclic ascending order of indexes of available DL RB sets, the available DL RB sets corresponding to the multiple PDSCHs scheduled by the DCI in the first format; or, determining, according to the first indication information and a cyclic descending order of indexes of available DL RB sets, the available DL RB sets corresponding to the multiple PDSCHs scheduled by the DCI in the first format; or, wherein the frequency hopping rule comprises: determining, according to the first indication information and a cyclic ascending order of indexes of all DL RB sets in the DL BWP, DL RB sets corresponding to the multiple PDSCHs scheduled by the DCI in the first format, and updating a determined unavailable DL RB set corresponding to a PDSCH to a headmost available DL RB set following the unavailable DL RB set; or determining, according to the first indication information and a cyclic descending order of indexes of all DL RB sets in the DL BWP, DL RB sets corresponding to the multiple PDSCHs scheduled by the DCI in the first format, and updating a determined unavailable DL RB set corresponding to a PDSCH to a hindmost available DL RB set preceding the unavailable DL RB set.
2. 2 . The method according to claim 1 , wherein, the frequency hopping rule is indicated by a predefined field in the DCI in the first format; or the frequency hopping rule is configured by a high-layer signaling; or the frequency hopping rule is defined in a protocol.
3. 3 . The method according to claim 1 , wherein, the cyclic ascending order of the indexes of the available DL RB sets is conforming to a first DL RB set interval; the cyclic descending order of the indexes of the available DL RB sets is conforming to a first DL RB set interval.
4. 4 . The method according to claim 1 , wherein, the cyclic ascending order of the indexes of the all DL RB sets in the DL BWP is conforming to a second DL RB set interval; the cyclic descending order of the indexes of the all DL RB sets in the DL BWP is conforming to a second DL RB set interval.
5. 5 . The method according to claim 1 , wherein the frequency hopping rule comprises: relative frequency-domain positions of different PDSCHs scheduled by the DCI in the first format are the same in respective DL RB sets.
6. 6 . The method according to claim 1 , further comprising: sending DCI in a second format, wherein the DCI in the second format is configured to indicate a usage attribute of each DL RB set in the DL BWP, and the usage attribute is “available” or “unavailable”.
7. 7 . A method for transmitting physical downlink shared channel (PDSCH), comprising: receiving downlink control information (DCI) in a first format from a network device, wherein the DCI in the first format comprises first indication information, and the first indication information is configured to indicate an index of a DL RB set where a headmost PDSCH, in multiple PDSCHs scheduled by the DCI in the first format, is located; and receiving, by a user equipment (UE) based on a frequency hopping rule and multiple available downlink (DL) resource block (RB) sets in a DL bandwidth part (BWP), the multiple PDSCHs scheduled by the DCI in the first format from the network device; wherein the frequency hopping rule comprises: determining, according to the first indication information and a cyclic ascending order of indexes of available DL RB sets, the available DL RB sets corresponding to the multiple PDSCHs scheduled by the DCI in the first format; or, determining, according to the first indication information and a cyclic descending order of indexes of available DL RB sets, the available DL RB sets corresponding to the multiple PDSCHs scheduled by the DCI in the first format; or, wherein the frequency hopping rule comprises: determining, according to the first indication information and a cyclic ascending order of indexes of all DL RB sets in the DL BWP, DL RB sets corresponding to the multiple PDSCHs scheduled by the DCI in the first format, and updating a determined unavailable DL RB set corresponding to a PDSCH to a headmost available DL RB set following the unavailable DL RB set; or, determining, according to the first indication information and a cyclic descending order of indexes of all DL RB sets in the DL BWP, DL RB sets corresponding to the multiple PDSCHs scheduled by the DCI in the first format, and updating a determined unavailable DL RB set corresponding to a PDSCH to a hindmost available DL RB set preceding the unavailable DL RB set.
8. 8 . The method according to claim 7 , wherein, the frequency hopping rule is indicated by a predefined field in the DCI in the first format; or the frequency hopping rule is configured by a high-layer signaling; or the frequency hopping rule is defined in a protocol.
9. 9 . The method according to claim 7 , wherein, the cyclic ascending order of the indexes of the available DL RB sets is conforming to a first DL RB set interval; the cyclic descending order of the indexes of the available DL RB sets is conforming to a first DL RB set interval.
10. 10 . The method according to claim 7 , wherein, the cyclic ascending order of the indexes of the all DL RB sets in the DL BWP is conforming to a second DL RB set interval; the cyclic descending order of the indexes of the all DL RB sets in the DL BWP is conforming to a second DL RB set interval.
11. 11 . The method according to claim 7 , wherein the frequency hopping rule comprises: relative frequency-domain positions of different PDSCHs scheduled by the DCI in the first format are the same in respective DL RB sets.
12. 12 . The method according to claim 7 , further comprising: receiving DCI in a second format, wherein the DCI in the second format is configured to indicate a usage attribute of each DL RB set in the DL BWP, and the usage attribute is “available” or “unavailable”.
13. 13 . A user equipment (UE), comprising a processor and a memory; wherein the memory is configured to store a computer program; and the processor is configured to execute the computer program, thereby implementing the method according to claim 7 .
14. 14 . A network device, comprising a processor and a memory; wherein the memory is configured to store a computer program; and the processor is configured to execute the computer program, thereby implementing actions comprising: sending downlink control information (DCI) in a first format to a user equipment (UE), wherein the DCI in the first format comprises first indication information, and the first indication information is configured to indicate an index of a DL RB set where a headmost PDSCH, in multiple PDSCHs scheduled by the DCI in the first format, is located; and sending, based on a frequency hopping rule and multiple available downlink (DL) resource block (RB) sets in a DL bandwidth part (BWP), the multiple PDSCHs scheduled by the DCI in the first format to the UE; wherein the frequency hopping rule comprises: determining, according to the first indication information and a cyclic ascending order of indexes of available DL RB sets, the available DL RB sets corresponding to the multiple PDSCHs scheduled by the DCI in the first format; or, determining, according to the first indication information and a cyclic descending order of indexes of available DL RB sets, the available DL RB sets corresponding to the multiple PDSCHs scheduled by the DCI in the first format; or, wherein the frequency hopping rule comprises: determining, according to the first indication information and a cyclic ascending order of indexes of all DL RB sets in the DL BWP, DL RB sets corresponding to the multiple PDSCHs scheduled by the DCI in the first format, and updating a determined unavailable DL RB set corresponding to a PDSCH to a headmost available DL RB set following the unavailable DL RB set; or, determining, according to the first indication information and a cyclic descending order of indexes of all DL RB sets in the DL BWP, DL RB sets corresponding to the multiple PDSCHs scheduled by the DCI in the first format, and updating a determined unavailable DL RB set corresponding to a PDSCH to a hindmost available DL RB set preceding the unavailable DL RB set.

Description

CROSS REFERENCE TO RELATED APPLICATION This application is a National Stage of International Application No. PCT/CN2021/083625, filed on Mar. 29, 2021, which is incorporated by reference herein in its entireties for all purposes. TECHNICAL FIELD Description of the Related Art Currently, in new radio (NR), downlink data is carried on physical downlink shared channel (PDSCH), and uplink data is carried on physical uplink shared channel (PUSCH). The base station schedules PDSCH and PUSCH through downlink control information (DCI) carried on physical downlink control channel (PDCCH). In order to ensure the flexibility of scheduling, one DCI can schedule one PDSCH or one PUSCH. When the sub-carrier space (SCS) is 960 khz, the corresponding time slot duration is 1/64 ms. When the SCS is large and the time slot duration is small, if each PDSCH is scheduled by using a separate DCI, the overhead of blind DCI detection will be too heavy. In the design of multi-TTI (multi transmission time interval), one DCI can schedule PDSCH or PUSCH over multiple time slots. An example in a multi-TTI PDSCH scheduling scenario is given below for illustration. One DCI can schedule 4 PDSCHs, and the 4 PDSCHs correspond to 4 time slots or 4 PDSCH transmission opportunities, respectively. The 4 PDSCHs may be used to transmit different data, that is, to transmit different transport blocks (TBs). The number of DCIs can be reduced based on the design of multi-TTI, thereby reducing the complexity of UE blindly detecting DCIs. Herein, in the multi-TTI PDSCH scheduling scenario, the number of PDSCHs scheduled by one DCI may be semi-statically configured by the high layer, or may be dynamically indicated by a scheduling DCI based on a value range indicated by the protocol or configured by a high-layer signaling. SUMMARY This disclosure relates to the field of wireless communication technologies, and in particular, to a method, an apparatus and a readable storage medium for transmitting a physical downlink shared channel (PDSCH). In view of above, some embodiments of this disclosure propose a method, an apparatus, and a readable storage medium for transmitting PDSCH. In a first aspect, some embodiments of this disclosure provide a method for transmitting PDSCH, where the method is performed by a network device or performed by a chip in the network device. The network device may include an access network device, such as a base station, a nodeB, and the like. The method includes: sending, based on a frequency hopping rule and multiple available downlink (DL) resource block (RB) sets in a DL bandwidth part (BWP), multiple PDSCHs scheduled by downlink control information (DCI) in a first format to a user equipment (UE). In a second aspect, some embodiments of this disclosure provide a method for transmitting PDSCH, where the method is performed by a network device or performed by a chip in the network device. The network device may be a mobile phone. The method includes receiving, based on a frequency hopping rule and multiple available DL RB sets in a DL BWP, multiple PDSCHs scheduled by DCI in a first format from a network device. In a third aspect, some embodiments of this application provides a communication device. The communication device may be configured to perform the steps performed by the network device in the first aspect or any possible embodiments thereof. The network device may implement each function in the above-mentioned methods in the form of a hardware structure, a software module, or a combination of hardware structure and software module. When the communication device described in the third aspect is implemented by a software module, the communication device may include a communication module and a processing module coupled with each other, where the communication module may be configured to support communications of the communication device, and the processing module may be configured to perform processing operations of the communication device, such as generating information/messages to be sent, or obtaining information/messages by processing received signals. When performing the steps described in the first aspect, a transceiver module is configured to send, based on a frequency hopping rule and multiple available DL RB sets in a DL BWP, multiple PDSCHs scheduled by DCI in a first format to UE. In a fourth aspect, some embodiments of this application provides a communication device. The communication device may be configured to perform the steps performed by UE in the second aspect or any possible embodiments thereof. UE may implement each function in the above-mentioned methods in the form of a hardware structure, a software module, or a combination of hardware structure and software module. When the communication device described in the fourth aspect is implemented by a software module, the communication device may include a communication module and a processing module coupled with each other, where the communication modu