US-12621868-B2 - Random access response sending method and receiving method, and apparatus and terminal device

Abstract

A method for sending a random access response, where the method is applied to a base station, and the method includes: generating at least one random access response (RAR) in response to receiving at least one random access preamble; and allocating the at least one RAR to at least one transport block carried by at least one physical downlink shared channel (PDSCH).

Inventors

• Qin MU

Assignees

• BEIJING XIAOMI MOBILE SOFTWARE CO., LTD.

Dates

Publication Date

20260505

Application Date

20201130

Claims (19)

1. 1 . A method for sending a random access response, wherein the method is applied to a base station, and the method comprises: generating at least one random access response (RAR) in response to receiving at least one random access preamble; and allocating the at least one RAR to at least one transport block carried by at least one physical downlink shared channel (PDSCH) according to a preset algorithm, wherein the preset algorithm is related to an index value in the at least one random access preamble, and/or a number of all transport blocks.
2. 2 . The method according to claim 1 , wherein the at least one transport block carried by the at least one PDSCH comprises a plurality of transport blocks; a set capacity size of each transport block of the plurality of transport blocks is equal to a set capacity size of other ones of the plurality of transport blocks; or a set capacity size of each transport block of the plurality of transport blocks is different from a set capacity size of other ones of the plurality of transport blocks.
3. 3 . The method according to claim 2 , further comprising: performing, in response to an information size of the at least one RAR allocated in a transport block carried by a PDSCH being lower than the set capacity size of the transport block carried by the PDSCH, information filling and padding on the transport block carried by the PDSCH until reaching the set capacity size.
4. 4 . The method according to claim 1 , wherein allocating the at least one RAR to the at least one transport block carried by the at least one PDSCH according to the preset algorithm comprises: obtaining an operation result by performing a modulo operation on the index value of a random access preamble for the number of all transport blocks; and obtaining a position index value of a transport block carrying a RAR corresponding to the random access preamble by adding 1 to the operation result.
5. 5 . The method according to claim 1 , further comprising: scheduling the at least one transport block carried by the at least one PDSCH through a physical downlink control channel (PDCCH); wherein scheduling the at least one transport block carried by the at least one PDSCH through the PDCCH comprises: scheduling all transport blocks carried by PDSCHs in the at least one transport block carried by the at least one PDSCH through a same PDCCH.
6. 6 . The method according to claim 5 , wherein a plurality of transport blocks carried by PDSCHs share a part of scheduling resources; control information sent on the PDCCH comprises an MCS or a transmission resource associated with the plurality of transport blocks carried by PDSCHs; and the plurality of transport blocks carried by PDSCHs are continuous in time, or provided with a time interval between each other.
7. 7 . The method according to claim 5 , wherein control information sent on the PDCCH comprises: a number of all transport blocks carried by PDSCHs; and/or a number of RARs comprised in each transport block carried by a PDSCH.
8. 8 . The method according to claim 5 , wherein following are notified through broadcast signaling: a number of all transport blocks carried by PDSCHs; and/or a number of RARs comprised in each transport block carried by a PDSCH.
9. 9 . The method according to claim 5 , wherein scheduling the at least one transport block carried by the at least one PDSCH through the PDCCH comprises: scheduling different transport blocks carried by PDSCHs respectively through a plurality of different PDCCHs; wherein the plurality of different PDCCHs have a corresponding relationship with scheduled transport blocks carried by PDSCHs.
10. 10 . The method according to claim 9 , further comprising: performing scrambling by associating control information carried by the plurality of different PDCCHs with different scrambling codes respectively; wherein a scrambling code associated with control information carried by a PDCCH is related to a random access preamble corresponding to a RAR comprised in a correspondingly scheduled transport block carried by a PDSCH.
11. 11 . The method according to claim 9 , wherein the plurality of different PDCCHs respectively use different transmission resources; and a transmission resource used by a PDCCH is related to a random access preamble corresponding to a RAR comprised in a correspondingly scheduled transport block carried by a PDSCH.
12. 12 . A method for receiving a random access response, wherein the method is applied to a terminal device, and the method comprises: sending a random access preamble to a base station; determining a physical downlink control channel (PDCCH); and receiving a random access response (RAR) corresponding to the random access preamble from a transport block carried by a physical downlink shared channel (PDSCH) scheduled by the PDCCH, wherein the RAR is allocated to a transport block carried by the PDSCH according to a preset algorithm, and the preset algorithm is related to an index value in the random access preamble, and/or a number of all transport blocks.
13. 13 . The method according to claim 12 , wherein receiving the RAR from the transport block carried by the PDSCH scheduled by the PDCCH comprises: obtaining a transport block carrying the RAR from a plurality of transport blocks carried by PDSCHs scheduled by the PDCCH.
14. 14 . The method according to claim 13 , further comprising: determining the transport block carrying the RAR according to the preset algorithm.
15. 15 . The method according to claim 12 , wherein determining the PDCCH comprises: determining the PDCCH according to a used random access preamble.
16. 16 . The method according to claim 15 , wherein determining the PDCCH according to the used random access preamble comprises: determining a scrambling code associated with control information carried by the PDCCH according to the used random access preamble; and detecting the PDCCH according to the scrambling code.
17. 17 . The method according to claim 15 , wherein determining the corresponding PDCCH according to the used random access preamble comprises: determining a transmission resource used by the PDCCH according to the used random access preamble; and monitoring the PDCCH on the transmission resource.
18. 18 . A base station, comprising a processor, a transceiver, a memory, and a computer program stored in the memory, wherein the processor is configured to execute the computer program to cause the base station to: generate at least one random access response (RAR) in response to receiving at least one random access preamble; and allocate the at least one RAR to at least one transport block carried by at least one physical downlink shared channel (PDSCH) according to a preset algorithm, wherein the preset algorithm is related to an index value in the at least one random access preamble, and/or a number of all transport blocks.
19. 19 . A terminal device, comprising a processor, a transceiver, a memory, and a computer program stored in the memory, wherein the processor is configured to execute the computer program to implement the method for receiving a random access response according to claim 12 .

Description

CROSS-REFERENCE TO RELATED APPLICATIONS The present application is a U.S. National Stage of International Application No. PCT/CN2020/132774, filed on Nov. 30, 2020, all contents of which are incorporated herein by reference in their entireties for all purposes. TECHNICAL FIELD The present disclosure relates to the technical field of mobile communications, and in particular, to a method for sending a random access response, a method for receiving a random access response, an apparatus for sending a random access response, an apparatus for receiving a random access response, a base station, a terminal device, and a storage medium. BACKGROUND With the continuous development of Internet of Things services, for example, popularization of services such as video monitoring, smart home, wearable devices, industrial sensing monitoring and the like, these services generally have relatively higher requirements for rate, for example, requirements of rates of dozens to a hundred of megabytes, while also having relatively higher requirements for time delay. Therefore, it is difficult for the MTC (Machine Type Communication) technology and NB-IoT (Narrow Band Internet of Things) technology in LTE (Long Term Evolution) to meet these requirements. Based on this situation, many companies propose designing a new user equipment (UE) in the 5G (5th Generation Mobile Networks) new air interface to cover the requirements of such a terminal Internet of Things device. In the current 3GPP (3rd Generation Partnership Project) standardization, this new terminal type is called as Reduced Capability (Reducap) UE or simply called as NR-Lite. SUMMARY Embodiments of the first aspect of the present disclosure provide a method for sending a random access response, the method is applied to a base station, and the method includes: generating at least one random access response (RAR) in response to receiving at least one random access preamble; and allocating the at least one RAR to at least one transport block carried by at least one physical downlink shared channel (PDSCH). Embodiments of the second aspect of the present disclosure provide a method for receiving a random access response, the method is applied to a terminal device, and the method includes: sending a random access preamble to a base station; determining a PDCCH; and receiving a random access response (RAR) corresponding to the random access preamble from a transport block carried by a PDSCH scheduled by the PDCCH. Embodiments of the third aspect of the present disclosure provide a base station, including a processor, a transceiver, a memory, and a computer program stored on the memory, where the processor runs the computer program to implement the method for sending a random access response according to the foregoing embodiments of the first aspect. Embodiments of the fourth aspect of the present disclosure provide a terminal device, including a processor, a transceiver, a memory, and a computer program stored on the memory, where the processor runs the computer program to implement the method for receiving a random access according to the foregoing embodiments of the second aspect. Additional aspects and advantages of the present disclosure will be partially given in the following description, and will partially become apparent from the following description, or may be learned through the practice of the present disclosure. BRIEF DESCRIPTION OF THE DRAWINGS The above and/or additional aspects and advantages of the present disclosure will become apparent and readily appreciated from the following description of the embodiments in conjunction with the accompanying drawings, in which: FIG. 1 is an example diagram that a plurality of sent RARs may be multiplexed in one data packet in the related art; FIG. 2 is an example diagram that the PDCCH schedules a data packet loaded with a plurality of RARs in the related art; FIG. 3 is a flowchart of a method for sending a random access response provided according to some embodiments of the present disclosure; FIG. 4a is a first example diagram of loading data of a plurality of random access responses according to some embodiments of the present disclosure; FIG. 4b is a second example diagram of loading data of a plurality of random access responses according to some embodiments of the present disclosure; FIG. 5 is a flowchart of a method for sending a random access response according to some embodiments of the present disclosure; FIG. 6 is a third example diagram of loading data of a plurality of random access responses according to some embodiments of the present disclosure; FIG. 7 is a flowchart of another method for sending a random access response provided according to some embodiments of the present disclosure; FIG. 8 is a flowchart of another method for sending a random access response provided according to some embodiments of the present disclosure; FIG. 9 is a fourth example diagram of loading data of a plurality of random access