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EP-4290921-B1 - INFORMATION INDICATION METHOD, TERMINAL DEVICE, NETWORK DEVICE, CHIP AND STORAGE MEDIUM

EP4290921B1EP 4290921 B1EP4290921 B1EP 4290921B1EP-4290921-B1

Inventors

  • HE, CHUANFENG

Dates

Publication Date
20260506
Application Date
20210511

Claims (13)

  1. A method for information indication, comprising: receiving (S510), by a Reduced Capability, RedCap, terminal, first indication information from a network device; and determining (S520), by the RedCap terminal according to the first indication information, whether to provide an earlier indication for the RedCap terminal in first uplink information of a random access procedure; wherein the first uplink information comprises at least one of a first Physical Random Access CHannel, PRACH, or a first Physical Uplink Shared CHannel, PUSCH; wherein the first indication information is used to configure resources for transmitting a PRACH for the RedCap terminal, and the resources comprise a resource used by a non-RedCap terminal and a resource used by the RedCap terminal; the determining (S520), by the RedCap terminal according to the first indication information, whether to provide the earlier indication for the RedCap terminal in the first uplink information of the random access procedure comprises: determining, by the RedCap terminal, to provide the earlier indication for the RedCap terminal in the first uplink information of the random access procedure; wherein the first PRACH comprises: a PRACH of a 4-step random access procedure; or a PRACH in a Message A, MsgA, of a 2-step random access procedure; and the first PUSCH comprises: a PUSCH in a Message 3, Msg3, of a 4-step random access procedure; or a PUSCH of an MsgA of a 2-step random access procedure.
  2. The method of claim 1, wherein the determining (S520), by the RedCap terminal according to the first indication information, whether to provide the earlier indication for the RedCap terminal in the first uplink information of the random access procedure further comprises: in a case that the earlier indication for the RedCap terminal is determined to provide in the random access procedure according to received second indication information, determining, by the RedCap terminal according to the first indication information, whether to provide the earlier indication for the RedCap terminal in the first uplink information of the random access procedure.
  3. The method of claim 1, wherein the resources configured by the first indication information is used to transmit the first uplink information.
  4. The method of claim 1 or 2, wherein the first indication information indicates third uplink information, and the third uplink information is used to provide the earlier indication for the RedCap terminal, wherein the determining (S520), by the RedCap terminal according to the first indication information, whether to provide the earlier indication for the RedCap terminal in the first uplink information of the random access procedure further comprises: determining, by the RedCap terminal, to provide the earlier indication for the RedCap terminal in the first uplink information in a case that the third uplink information comprises the first uplink information.
  5. The method of any one of claims 1-4, wherein the earlier indication for the RedCap terminal comprises: an indication about at least one of a type or a capability of the RedCap terminal based on predetermined information; and the predetermined information comprises at least one of the following: a PRACH occasion; a PRACH format; a preamble; a BandWidth Part, BWP, for transmitting the PRACH; a scrambling code of data carried by the PUSCH; a sequence of a DeModulation Reference Signal, DMRS, of the PUSCH; information carried by the PUSCH; a PUSCH resource configuration; and a DMRS configuration for the PUSCH.
  6. The method of claim 1, wherein the first indication information comprises a target bit, the target bit with a value of 1 is used to indicate the RedCap terminal to provide the earlier indication, and the target bit with a value of 0 is used to indicate the RedCap terminal not to provide the earlier indication.
  7. The method of claim 1, further comprising: in a case where the resources configured by the first indication information comprise a PRACH resource for the non-RedCap terminal, providing, by the RedCap terminal, the earlier indication for the RedCap terminal in the first PRACH of the random access procedure; and in a case where the resources configured by the first indication information do not comprise the PRACH resource for the non-RedCap terminal, not providing, by the RedCap terminal, the earlier indication for the RedCap terminal in the first PRACH of the random access procedure, and providing, by the RedCap terminal, the earlier indication for the RedCap terminal in the first PUSCH of the random access procedure.
  8. A method for information indication, comprising transmitting (S610), by a network device, first indication information to a Reduced Capability, RedCap, terminal, wherein the first indication information indicates that the RedCap terminal should determine whether to provide an earlier indication for the RedCap terminal in first uplink information of a random access procedure, wherein the first uplink information comprises at least one of a first Physical Random Access CHannel, PRACH, or a first Physical Uplink Shared CHannel, PUSCH; wherein the first indication information is used to configure resources for transmitting a PRACH for the RedCap terminal, and the resources comprise a resource used by a non-RedCap terminal and a resource used by the RedCap terminal; the first indication information further indicates that the RedCap terminal determines to provide the earlier indication for the RedCap terminal in the first uplink information; wherein the first PRACH comprises: a PRACH of a 4-step random access procedure; or a PRACH in a Message A, MsgA, of a 2-step random access procedure; and the first PUSCH comprises: a PUSCH in a Message 3, Msg3, of a 4-step random access procedure; or a PUSCH of an MsgA of a 2-step random access procedure.
  9. The method of claim 8, wherein the transmitting (S610), by the network device, the first indication information to the RedCap terminal comprises: transmitting, by the network device, the first indication information to the RedCap terminal in a case that second indication information is transmitted to the RedCap terminal, wherein the second indication information indicates that the RedCap terminal determines to provide the earlier indication for the RedCap terminal during the random access procedure.
  10. The method of claim 8 or 9, wherein the first indication information further indicates third uplink information, and the third uplink information is used to provide the earlier indication for the RedCap terminal.
  11. The method of claim 8, wherein the first indication information comprises a target bit, the target bit with a value of 1 is used to indicate the RedCap terminal to provide the earlier indication, and the target bit with a value of 0 is used to indicate the RedCap terminal not to provide the earlier indication.
  12. A terminal device (600), comprising: a processor (610) and a memory (620) for storing a computer program, the processor (610) being configured to call and execute the computer program stored in the memory (620) to perform the method of any one of claims 1 to 7.
  13. A network device (600), comprising: a processor (610) and a memory (620) for storing a computer program, the processor (610) being configured to call and execute the computer program stored in the memory (620) to perform the method of any one of claims 8 to 11.

Description

TECHNICAL FIELD The disclosure relates to the field of communication, and particularly to a method for information indication, a terminal device, a network device, a chip, a computer readable storage medium, a computer program product, a computer program and a communication system. BACKGROUND A NR system supports Enhanced Mobile Broadband (eMBB) services with requirements of high speed, high spectral efficiency and large bandwidth, and also supports other service types, such as a sensor network, a video surveillance, a wearable device and so on, with different requirements in terms of the speed, the bandwidth, the power consumption and the cost. The capability of terminals supporting these services is reduced compared with those supporting the eMBB, such as a decrease of supported bandwidths, a relaxed processing time, a reduced number of antennas, a relaxed maximum modulation order, etc. Such terminals can be referred to as Reduced Capability (RedCap) terminals. In order to facilitate a network device to set a transmission mode of a downlink channel according to different terminal types, in the related technologies, a RedCap terminal is allowed to report its type or capability during a random access procedure, so that the network device can identify the access of the RedCap terminal earlier, and perform optimization based on the transmission capability of the RedCap terminal to improve the transmission efficiency. Such a reporting mode can be referred to as an earlier indication. However, when the terminal provides the earlier indication during the random access procedure, a set of uplink resources in the random access procedure will be divided, causing a decrease in the utilization rate of the uplink resources. Therefore, it is necessary to consider how to provide the earlier indication flexibly. US2021/058971A1 provides a method for PRACH preamble transmissions or receptions, the method includes receiving a PDSCH that provides a SIB, the SIB includes an indication for (i) a first TCI state that provides a first set of QCL properties and (ii) for a second TCI state that provides a second set of QCL properties; and transmitting a first PRACH according to the first TCI state and a second PRACH according to the second TCI state. HUAWEI ET AL: "Other aspects for reduced capability devices", 3GPP DRAFT; R1-2004612, 3RD GENERATION PARTNERSHIP PROJECT (3GPP), MOBILE COMPETENCE CENTRE ; 650, ROUTE DES LUCIOLES · F-06921 SOPHIA-ANTIPOLIS CEDEX · FRANCE vol. RAN WG1, no. E-meeting; 20200525-20200605 16 May 2020 (2020-05-16), XP051886328, discusses about the characteristics of the REDCAP (reduced capability) UEs and the identification and access restriction of reduced capabilities devices. SUMMARY In view of this, embodiments of the present disclosure provide a method for information indication, a terminal device, a network device, a chip, a computer readable storage medium, a computer program product, a computer program and a communication system, which can be used to provide the earlier indication flexibly. The present invention is defined in the independent claims, and preferred embodiments are defined in the dependent claims. According to the technical solution of the embodiments of the present disclosure, a terminal device can determine whether to provide an earlier indication that the terminal device is a RedCap terminal in first uplink information of a random access procedure according to the first indication information transmitted by a network device. Therefore, by configuring the first indication information, the earlier indication and the uplink information used for the earlier indication can be flexibly configured, so that it is convenient for the network device to perform optimization according to the terminal type, furthermore, it can avoid a decrease of the utilization rate caused by an excessive division to uplink resources during the random access procedure. BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 is a schematic diagram of architecture of a communication system according to an embodiment of the present disclosure.FIG. 2 is a schematic diagram of a 4-step random access procedure.FIG. 3 is a schematic diagram of a 2-step random access procedure.FIG. 4 is a schematic diagram of a relative relationship between a Physical Uplink Shared Channel (PUSCH) Occasion (PO) and an associated Random Access Channel (RACH) Occasion (RO).FIG. 5 is a schematic flowchart of a method for information indication according to an embodiment of the present disclosure.FIG. 6 is a schematic flowchart of a method for information indication according to another embodiment of the present disclosure.FIG. 7 is a schematic structural block diagram of a terminal device according to an embodiment of the present disclosure.FIG. 8 is a schematic structural block diagram of a network device according to an embodiment of the present disclosure.FIG. 9 is a schematic block diagram of a communication device according to an embodiment of the