CN114390714A

CN114390714A - Transmission method, device, terminal equipment, network equipment and medium for coverage enhancement

Info

Publication number: CN114390714A
Application number: CN202011112048.3A
Authority: CN
Inventors: 费永强; 高雪娟; 邢艳萍
Original assignee: Datang Mobile Communications Equipment Co Ltd
Current assignee: Datang Mobile Communications Equipment Co Ltd
Priority date: 2020-10-16
Filing date: 2020-10-16
Publication date: 2022-04-22
Anticipated expiration: 2040-10-16
Also published as: CN114390714B; WO2022078131A1

Abstract

The embodiment of the application provides a transmission method, a device, terminal equipment, network equipment and a medium for coverage enhancement, wherein the method comprises the following steps: receiving repeated indication information sent by network equipment; the repeated indication information is used for indicating the terminal equipment UE to repeatedly send a Physical Uplink Shared Channel (PUSCH) corresponding to a first message, and the first message is used for two-step random access; and determining resources for repeatedly sending the PUSCH corresponding to the first message according to the repeated indication information, and repeatedly sending the PUSCH corresponding to the first message in the resources. The embodiment of the application enhances the coverage performance of the uplink channel in the random access stage.

Description

Transmission method, device, terminal equipment, network equipment and medium for coverage enhancement

Technical Field

The present application relates to the field of communications technologies, and in particular, to a transmission method, an apparatus, a terminal device, a network device, and a medium for coverage enhancement.

Background

In a 5G new wireless nr (new radio) system, with the increase of deployment frequency of a wireless system, propagation loss of a wireless signal is increased, which results in shortening of transmission distance of the signal and degradation of coverage performance of a network. In particular, for uplink transmission, that is, transmission transmitted by a terminal device (UE) and received by a base station (g Node B, gbb), the coverage of an uplink channel is more limited than that of a downlink channel because the transmission power of the UE is lower.

NR supports Random Access in a two-step Random Access Channel (2-step RACH) manner. At present, in the random access phase, the coverage performance of the uplink channel is relatively poor, and since whether the success of the random access directly affects whether the UE can obtain the network service, it is urgently needed to enhance the coverage performance of the uplink channel in the random access phase.

Disclosure of Invention

Embodiments of the present application provide a transmission method, an apparatus, a terminal device, a network device, and a medium for coverage enhancement, so as to solve the problem in the prior art that, in a random access stage, a coverage performance of an uplink channel is relatively poor.

In order to solve the above problem, in particular, the embodiment of the present application provides the following technical solutions:

in a first aspect, an embodiment of the present application provides a coverage enhancement transmission method, including:

receiving repeated indication information sent by network equipment; the repeated indication information is used for indicating the terminal equipment UE to repeatedly send a Physical Uplink Shared Channel (PUSCH) corresponding to a first message, and the first message is used for two-step random access;

and determining resources for repeatedly sending the PUSCH corresponding to the first message according to the repeated indication information, and repeatedly sending the PUSCH corresponding to the first message in the resources.

Optionally, the repetition indication information includes:

whether to perform repeated transmission, and/or the number of repeated transmission.

Optionally, determining resources for repeatedly transmitting the PUSCH corresponding to the first message according to the repetition indication information, and repeatedly transmitting the PUSCH corresponding to the first message in the resources includes one or more of the following manners:

determining that the repeated sending of the PUSCH is carried out only in a plurality of physical uplink shared channel occasions PO corresponding to one PUSCH configuration according to the repeated indication information;

and determining repeated transmission of the PUSCH in a plurality of POs corresponding to a plurality of PUSCH configurations according to the repeated indication information.

Optionally, the determining to perform repeated PUSCH transmission in multiple POs corresponding to multiple PUSCH configurations includes any one of the following manners:

determining that repeated PUSCH transmission is carried out only among a plurality of PUSCH configurations corresponding to random access channel occasions RO of the synchronous signal blocks SSB corresponding to the same index in one association period;

determining repeated PUSCH transmission among a plurality of PUSCH configurations corresponding to the RO of the SSB with the same index in a plurality of association periods;

determining that repeated PUSCH transmission is performed among a plurality of PUSCH configurations corresponding to ROs of SSBs with the same or different indexes, and that DMRSs used by POs in the PUSCH configurations corresponding to different ROs are different.

Optionally, the repetition indication information includes: multiplexing indication information, wherein the multiplexing indication information is used for indicating repeated transmission resources of the PUSCH based on the resource configuration mode of the PUSCH.

Optionally, the multiplexing indication information is used to indicate, based on a resource configuration mode of a PUSCH, a preamble sequence number of a physical random access channel PRACH mapped to a same physical uplink shared channel occasion PO; and the preamble sequence number of the Physical Random Access Channel (PRACH) mapped to the same physical uplink shared channel occasion (PO) is used for determining the repeated sending resource of the PUSCH.

In a second aspect, an embodiment of the present application further provides a coverage enhanced transmission method, including:

sending repeated indication information to terminal equipment (UE); the repeated indication information is used for indicating the UE to repeatedly send a Physical Uplink Shared Channel (PUSCH) corresponding to a first message, and the first message is used for two-step random access.

Optionally, the repetition indication information includes:

Optionally, the repetition indication information is further used to indicate resources used by the UE to repeatedly send a PUSCH corresponding to the first message.

Optionally, the resources required for repeatedly transmitting the PUSCH corresponding to the first message include one or more of the following:

repeated sending of PUSCHs is carried out in a plurality of physical uplink shared channel occasions PO corresponding to one PUSCH configuration;

repeated transmission of the PUSCH is performed in a plurality of POs corresponding to a plurality of PUSCH configurations.

Optionally, the repeatedly transmitting the PUSCH in the POs corresponding to the PUSCH configurations includes any one of the following manners:

repeatedly sending PUSCH only among a plurality of PUSCH configurations corresponding to random access channel occasions RO of the synchronous signal blocks SSB corresponding to the same index in one association period;

repeatedly transmitting PUSCHs among a plurality of PUSCH configurations corresponding to ROs of SSBs with the same index in a plurality of association periods;

repeated transmission of the PUSCH is performed between a plurality of PUSCH configurations corresponding to ROs of SSBs corresponding to the same or different indices, and demodulation reference signals DMRSs used by POs in PUSCH configurations corresponding to different ROs are different.

Optionally, the coverage enhanced transmission method further includes:

and receiving the PUSCH repeatedly transmitted by the UE in the indicated resources.

In a third aspect, an embodiment of the present application further provides a transmission apparatus with enhanced coverage, including:

the receiving module is used for receiving the repeated indication information sent by the network equipment; the repeated indication information is used for indicating the terminal equipment UE to repeatedly send a Physical Uplink Shared Channel (PUSCH) corresponding to a first message, and the first message is used for two-step random access;

and a determining module, configured to determine, according to the repetition indication information, a resource for repeatedly sending a PUSCH corresponding to the first message, and repeatedly send a PUSCH corresponding to the first message in the resource.

In a fourth aspect, an embodiment of the present application further provides a transmission apparatus with enhanced coverage, including:

a sending module, configured to send repeat indication information to a terminal device UE; the repeated indication information is used for indicating the UE to repeatedly send a Physical Uplink Shared Channel (PUSCH) corresponding to a first message, and the first message is used for two-step random access.

In a fifth aspect, an embodiment of the present application further provides a terminal device, including a memory, a processor, and a computer program stored on the memory and executable on the processor, where the processor implements the following steps when executing the computer program:

Optionally, the repetition indication information includes: whether to perform repeated transmission, and/or the number of repeated transmission.

In a sixth aspect, an embodiment of the present application further provides a network device, including a memory, a processor, and a computer program stored on the memory and executable on the processor, where the processor implements the following steps when executing the computer program:

Optionally, the repetition indication information includes:

Optionally, the processor, when executing the computer program, is further configured to implement the following steps:

In a seventh aspect, this application embodiment further provides a processor-readable storage medium, which stores a computer program for causing a processor to execute the steps of the coverage enhanced transmission method according to the first aspect or the second aspect.

According to the transmission method, the transmission device, the terminal device, the network device and the medium for coverage enhancement provided by the embodiment of the application, the terminal device UE can repeatedly send the physical uplink shared channel PUSCH corresponding to the first message for two-step random access by receiving the repeated indication information sent by the network device, so that the coverage performance of the uplink channel in the random access stage can be effectively enhanced, and the problem that the coverage performance of the uplink channel in the random access stage is poor in the prior art can be solved.

Drawings

In order to more clearly illustrate the embodiments of the present application or the technical solutions in the prior art, the drawings needed to be used in the description of the embodiments or the prior art will be briefly described below, and it is obvious that the drawings in the following description are some embodiments of the present application, and other drawings can be obtained by those skilled in the art without creative efforts.

FIG. 1 is a schematic diagram of a 2-step RACH mechanism provided in an embodiment of the present application;

fig. 2 is a flowchart illustrating steps of a transmission method applied to coverage enhancement of a terminal device according to an embodiment of the present application;

fig. 3 is a flowchart illustrating steps of a transmission method applied to coverage enhancement of a network device according to an embodiment of the present application;

FIG. 4 is a schematic diagram of an application scenario provided in an embodiment of the present application;

fig. 5 is a schematic diagram of determining a PO resource for a repeated transmission according to a PO resource for a single transmission and the number of MsgA repetitions according to an embodiment of the present application;

fig. 6 is a second schematic diagram of determining PO resources for retransmission according to PO resources for single transmission and MsgA repetition times provided by the embodiment of the present application;

fig. 7 is a schematic diagram of determining a repeated transmission resource of a PUSCH of MsgA according to each PO indication repetition number according to an embodiment of the present application;

fig. 8 is a schematic diagram illustrating that a PUSCH of MsgA sent by a UE is repeatedly sent among a plurality of PUSCH configurations corresponding to ROs of SSBs with the same index in an association period according to an embodiment of the present application;

fig. 9 is a schematic diagram illustrating that a PUSCH of MsgA sent by a UE is repeatedly sent between a plurality of PUSCH configurations corresponding to ROs of SSBs with the same index in different association periods according to an embodiment of the present application;

fig. 10 is a schematic diagram illustrating that a PUSCH of MsgA transmitted by a UE is repeatedly transmitted between a plurality of PUSCH configurations corresponding to ROs corresponding to SSBs with the same or different indexes according to an embodiment of the present application;

fig. 11 is a block diagram of a transmission apparatus for coverage enhancement applied to a terminal device according to an embodiment of the present application;

fig. 12 is a block diagram of a transmission apparatus for coverage enhancement applied to a network device according to an embodiment of the present application;

fig. 13 is a schematic structural diagram of a terminal device provided in an embodiment of the present application;

fig. 14 is a schematic structural diagram of a network device according to an embodiment of the present application.

Detailed Description

The technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the drawings in the embodiments of the present application, and it is obvious that the described embodiments are only a part of the embodiments of the present application, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present application.

In the new 5G wireless nr (new radio) system, along with the increase in deployment frequency of the wireless system, propagation loss of a wireless signal is increased, which results in a shortened transmission distance of the signal and a reduced coverage performance of the network. In particular, for uplink transmission, that is, transmission transmitted by a terminal device (UE) and received by a base station (g Node B, gbb), the coverage of an uplink channel is more limited than that of a downlink channel because the transmission power of the UE is lower.

It is understood that the mechanism of 2-step RACH can be summarized simply as:

the method comprises the following steps that firstly, the gNB broadcasts and transmits one or more Synchronization Signal Blocks (SSBs), the broadcasted System message Block 1(System Information Block1, SIB1) indicates the corresponding relation between the SSBs and random access occasions (RACH occupation, RO), and the PUSCH configuration Information indicates the transmission resources of physical uplink shared channel occasions (PUSCH occupation, PO) corresponding to PRACH preamble sequences transmitted in the ROs;

UE can measure the signal strength of a plurality of SSBs, select an SSB with the received signal strength higher than a threshold value, and initiate random access from the RO and PO corresponding to the SSB; specifically, the UE sends a message a (MessageA, MsgA) to the gNB, where MsgA includes a part of a Physical Random Access Channel (PRACH) and a part of a Physical Uplink Shared Channel (PUSCH), where the PRACH (i.e. a preamble sequence) is sent in the RO and the PUSCH part is sent in the PO; the threshold value may be predefined or the gNB broadcasts a transmission notification;

and after receiving the MsgA sent by the UE, the gNB can send a message B (MessageB, MsgB) to the terminal to confirm that the terminal is successfully accessed.

As shown in FIG. 1, FIG. 1 shows a specific example of SSB, RO, PO correspondence in 2-step RACH. In fig. 1, it is assumed that one SSB corresponds to one RO, one RO corresponds to one PUSCH configuration, and one PUSCH configuration includes four POs in one association period. A plurality of POs corresponding to the same PUSCH configuration may also be considered as one PO group.

In the existing 2-step RACH, the correspondence between preamble sequences and POs is predefined. Specifically, in one PRACH slot, every N_preambleThe preamble sequences correspond to a PO configured by PUSCH and use a specific DMRS, which may be considered as N_preambleThere is a correspondence between the preamble sequence of a particular { time, frequency, (preamble) code } and the PO of a particular { time, frequency, (DMRS) code }. Wherein N is_preamble＝ceil(T_preamble/T_PUSCH)，T_preambleRepresenting the product of the number of valid ROs in an association pattern period and the number of preamble sequences that can be transmitted by each RO, T_PUSCHRepresents the product of the number of valid POs and the number of DMRSs usable in each PO within one association pattern period, ceil (x) represents rounding up x. The association pattern period is an association pattern period, and generally speaking, the duration of the association pattern period is 160 ms. Referring to the bottom left corner of fig. 1, PRACH preamble sequences 0 to 7 may be sent in RO0, and each preamble sequence is mapped to a specific PO in a PUSCH configuration and corresponds to a specific DMRS through a certain rule.

It can be appreciated that repeated transmission is an effective technical means for coverage enhancement. However, in the prior art, both the PRACH and PUSCH of MsgA do not support repeated transmission. Even if one SSB corresponds to multiple ROs, the UE can only send the PRACH of MsgA in selecting one of the ROs; similarly, the UE can only send the PUSCH of MsgA in one PO corresponding to the PRACH preamble it sends. In particular, the coverage performance of PUSCH is often inferior to that of PRACH, and it is easy to become a coverage bottleneck. In order to solve the problem, in the embodiment of the present application, the network device sends the repeat indication information to the UE, so that the UE repeatedly sends the physical uplink shared channel PUSCH corresponding to the first message for the two-step random access, so that the coverage performance of the uplink channel in the random access phase can be enhanced, and the problem in the prior art that the coverage performance of the uplink channel in the random access phase is poor can be solved. And in the repeated transmission process, the relevance between the SSB and the RO and the PO is ensured as much as possible, so that the correspondence between the uplink and downlink beams and the receiving performance of the base station are ensured. The transmission method, apparatus, terminal device, network device and medium for coverage enhancement provided by the present application will be explained and explained in detail by specific embodiments below.

It should be noted that, in the following description, since the method and the apparatus are based on the same application concept, and the principles of solving the problems of the method and the apparatus are similar, the implementation of the apparatus and the method can be mutually referred, and repeated details are not repeated.

In addition, it should be noted that the technical solutions provided in the embodiments of the present application may be applied to various systems, especially 5G systems. For example, the applicable system may be a global system for mobile communication (GSM) system, a Code Division Multiple Access (CDMA) system, a Wideband Code Division Multiple Access (WCDMA) General Packet Radio Service (GPRS) system, a long term evolution (long term evolution, LTE) system, an LTE Frequency Division Duplex (FDD) system, an LTE Time Division Duplex (TDD) system, an LTE-a (long term evolution) system, a universal mobile system (universal mobile telecommunications system, UMTS), a Worldwide Interoperability for Mobile Access (WiMAX) system, a New Radio Network (NR) system, etc. These various systems include terminal devices and network devices. The System may further include a core network portion, such as an Evolved Packet System (EPS), a 5G System (5GS), and the like.

The terminal device referred to in the embodiments of the present application may refer to a device providing voice and/or data connectivity to a user, a handheld device having a wireless connection function, or another processing device connected to a wireless modem. In different systems, the names of the terminal devices may be different, for example, in a 5G system, the terminal device may be called a User Equipment (UE). A wireless terminal device, which may be a mobile terminal device such as a mobile telephone (or "cellular" telephone) and a computer having a mobile terminal device, for example, a portable, pocket, hand-held, computer-included, or vehicle-mounted mobile device, may communicate with one or more Core Networks (CNs) via a Radio Access Network (RAN). Examples of such devices include Personal Communication Service (PCS) phones, cordless phones, Session Initiation Protocol (SIP) phones, Wireless Local Loop (WLL) stations, and Personal Digital Assistants (PDAs). The wireless terminal device may also be referred to as a system, a subscriber unit (subscriber unit), a subscriber station (subscriber station), a mobile station (mobile), a remote station (remote station), an access point (access point), a remote terminal device (remote terminal), an access terminal device (access terminal), a user terminal device (user terminal), a user agent (user agent), and a user device (user device), which are not limited in this embodiment of the present application. Since the terminal device forms a network capable of supporting communication with other network devices (e.g., a core network device, an access network device (i.e., a base station)), the terminal device is also considered as a network device in the present invention.

The network device related to the embodiment of the present application may be a base station, where the base station may include multiple cells providing services for a terminal, and may also be a CU (Central Unit) or a DU (Distributed Unit). A network device may also be referred to as an access point or a device in an access network that communicates over the air-interface, through one or more sectors, with wireless terminal devices, or by other names, depending on the particular application. The network device may be configured to exchange received air frames with Internet Protocol (IP) packets as a router between the wireless terminal device and the rest of the access network, which may include an Internet Protocol (IP) communication network. The network device may also coordinate attribute management for the air interface. For example, the network device according to the embodiment of the present application may be a Base Transceiver Station (BTS) in a Global System for Mobile communications (GSM) or a Code Division Multiple Access (CDMA), may be a network device (NodeB) in a Wideband Code Division Multiple Access (WCDMA), may be an evolved Node B (eNB or e-NodeB) in a Long Term Evolution (LTE) System, may be a 5G Base Station (gbb) in a 5G network architecture (next evolution System), may be a Home evolved Node B (HeNB), a relay Node (relay Node), a Home Base Station (femto), a pico Base Station (pico Base Station), and the like, which are not limited in the embodiments of the present application. In some network architectures, a network device may include a Centralized Unit (CU) node and a Distributed Unit (DU) node, which may also be geographically separated.

Furthermore, it should be understood that the term "and/or" in the embodiments of the present application describes an association relationship of associated objects, and means that there may be three relationships, for example, a and/or B, which may mean: a exists alone, A and B exist simultaneously, and B exists alone. The character "/" generally indicates that the former and latter associated objects are in an "or" relationship.

Reference throughout this specification to "one embodiment" or "an embodiment" means that a particular feature, structure, or characteristic described in connection with the embodiment is included in at least one embodiment of the present application. Thus, the appearances of the phrases "in one embodiment" or "in an embodiment" in various places throughout this specification are not necessarily all referring to the same embodiment. Furthermore, the particular features, structures, or characteristics may be combined in any suitable manner in one or more embodiments.

The present application is explained in detail below.

As shown in fig. 2, a flowchart of steps of a transmission method for coverage enhancement applied to a terminal device according to an embodiment of the present application is provided, where the method includes the following steps:

step 101: receiving repeated indication information sent by network equipment; the repeated indication information is used for indicating the terminal equipment UE to repeatedly send a Physical Uplink Shared Channel (PUSCH) corresponding to a first message, and the first message is used for two-step random access;

in this step, the network device may be a base station gNB or other network side device. The first message may be message a (i.e., MessageA, MsgA) sent by the UE to the gNB during the random access phase.

In this step, the UE receives the duplicate indication information sent by the network device; the repeated indication information is used for indicating the terminal equipment UE to repeatedly send a Physical Uplink Shared Channel (PUSCH) corresponding to a first message, and the first message is used for two-step random access.

In this step, it should be noted that, currently, in the random access phase, the coverage performance of the uplink channel is relatively poor, and whether the success or failure of the random access directly affects whether the UE can obtain the network service, so it is urgently needed to enhance the coverage performance of the uplink channel in the random access phase.

In this step, it is understood that the repetition indication information may be explicit indication information, such as: whether to repeat the transmission, and/or the number of repetitions, etc. may also be implicit indication information, such as: and implicitly indicating repeated transmission resources and the like based on the PUSCH configuration resources.

Step 102: and determining resources for repeatedly sending the PUSCH corresponding to the first message according to the repeated indication information, and repeatedly sending the PUSCH corresponding to the first message in the resources.

In this step, after receiving the repetition indication information sent by the network device, the UE may determine, according to the repetition indication information, a resource for repeatedly sending a PUSCH corresponding to the first message, and repeatedly send a PUSCH corresponding to the first message in the resource. Specifically, after receiving the repetition indication information sent by the network device, the UE may determine, according to the repetition indication information, a resource for repeatedly sending a PUSCH corresponding to the first message, where the resource includes at least two cases: one is that the resource required for repeatedly transmitting the PUSCH corresponding to the first message is specifically indicated in the repetition indication information, and in this case, the UE repeatedly transmits the PUSCH corresponding to the first message according to the resource specifically indicated in the repetition indication information. The other is that the resource required for repeatedly transmitting the PUSCH corresponding to the first message is not specifically indicated in the repetition indication information, but only the number of times of repeated transmission is given, and at this time, the UE may perform repeated transmission of the PUSCH corresponding to the first message according to the resource corresponding to the number of times of repeated transmission, which is predefined by the protocol.

According to the transmission method for coverage enhancement provided by the embodiment of the application, the terminal equipment UE can repeatedly send the PUSCH corresponding to the first message for two-step random access by receiving the repeated indication information sent by the network equipment, so that the coverage performance of an uplink channel in a random access stage can be effectively enhanced, and the problem that the coverage performance of the uplink channel in the random access stage is poor in the prior art can be solved.

Based on the content of the foregoing embodiment, in this embodiment, the repetition indication information includes:

In this embodiment, an implementation manner of the repetition indication information is given, that is, the repetition indication information may include whether to perform repeated transmission and/or the number of times of repeated transmission. That is, the following cases may be included:

in the first case: the repeated indication information only comprises whether repeated sending is carried out or not, repeated sending times are not given, and at the moment, if repeated sending is not carried out, the repeated sending times can be not considered; at this time, if the repeated transmission is performed, the repeated transmission of the PUSCH corresponding to the first message may be performed according to a predefined number of repetitions or a randomly determined number of repetitions, for example, the number of repetitions may be predefined as a total number of a plurality of POs included in one PUSCH configuration in the time domain, or 1/2, 1/4 of the total number, or the like.

In the second case: the repetition indication information includes only the number of times of repeated transmission, and if the number of times of repeated transmission is 3 times, the repeated transmission of the PUSCH corresponding to the first message may be performed according to the number of times of repeated transmission.

In the third case: the repetition indication information includes the number of times of repeated transmission as well as whether or not to perform repeated transmission, and in this case, if the repeated transmission is performed and the number of times of repeated transmission is 2, the repeated transmission of the PUSCH corresponding to the first message is performed according to the number of times of repeated transmission.

In this embodiment, it can be seen that the repetition indication information gives explicit indication information, that is, whether to perform repeated transmission and/or the number of times of repeated transmission is explicitly given, so that after receiving the repetition indication information, the UE can know whether to perform repeated transmission of the PUSCH corresponding to the first message and the specific number of times of the repeated transmission.

Based on the content of the foregoing embodiment, in this embodiment, determining resources for repeatedly transmitting the PUSCH corresponding to the first message according to the repetition indication information, and repeatedly transmitting the PUSCH corresponding to the first message in the resources includes one or more of the following manners:

In this embodiment, after receiving the repetition indication information, it is necessary to determine resources for repeatedly transmitting a PUSCH corresponding to the first message, and specifically, determining resources for repeatedly transmitting a PUSCH corresponding to the first message may include one or more of the following manners:

the PUSCH is repeatedly transmitted in a PO group corresponding to one PUSCH configuration (referred to as PO intra-group repetition for short);

the PUSCH is repeatedly transmitted in PO groups corresponding to a plurality of PUSCH configurations (referred to as repetition among the PO groups);

combining repeated transmissions of repeats within a PO group and between PO groups.

In this embodiment, it can be seen that, in this embodiment, a manner for determining a resource for repeatedly transmitting a PUSCH corresponding to the first message is provided, where the manner includes repeated transmission in a PO group, repeated transmission between PO groups, and repeated transmission combining repeated transmission in a PO group and repeated transmission between PO groups, respectively.

In this embodiment, it should be noted that, when the PUSCH is repeatedly transmitted in only the PO group (a plurality of POs) of the physical uplink shared channel occasion corresponding to one PUSCH configuration, the following implementation may be specifically adopted:

after completing one round of mapping from all PRACH preamble sequences in a PRACH time slot of a physical random access channel to a PO group, continuing the next round of mapping until repeating K times, wherein K is the repeated sending times determined according to the repeated indication information;

or the like, or, alternatively,

repeatedly executing the mapping process from partial PRACH preamble sequences to PO K times after the partial PRACH preamble sequences in the PRACH time slot of the physical random access channel are mapped to PO until all the PRACH preamble sequences are mapped to a PO group;

or the like, or, alternatively,

indicating a PUSCH (physical uplink shared channel) to configure repeated transmission resources of each PO in a PO group corresponding to the physical uplink shared channel in advance; wherein the number of repetitions of each PO is the same or different.

It can be understood that, in this embodiment, the gNB may instruct the UE to send the PUSCH of the MsgA in multiple POs, and the number of repetitions of the multiple POs may be the same or different; after the UE sends the PUSCH of the MsgA in multiple POs, the gNB may perform joint detection or joint demodulation on the PUSCH of the MsgA from the same UE in multiple POs, so as to improve detection or demodulation performance, and achieve coverage enhancement.

It can be understood that, since the present embodiment employs a different PO resource indication scheme than the prior art, the PUSCH configuration indication information is difficult to multiplex, and therefore, the present embodiment is suitable for covering a case where the enhanced MsgA and the PUSCH resource used by the existing MsgA are configured independently.

Based on the content of the foregoing embodiment, in this embodiment, the determining that the PUSCH is repeatedly transmitted in the POs corresponding to the PUSCH configurations includes any one of the following manners:

In this embodiment, it should be noted that three different manners of repeatedly transmitting between PO groups are given, that is, firstly, repeatedly transmitting PUSCH between a plurality of PUSCH configurations corresponding to the random access channel timing RO of the synchronization signal block SSB corresponding to the same index in one association period; repeatedly sending PUSCH among a plurality of PUSCH configurations corresponding to the RO of the SSB corresponding to the same index in a plurality of association periods; and thirdly, repeatedly transmitting PUSCH among a plurality of PUSCH configurations corresponding to the ROs of the SSBs with the same or different indexes, wherein the DMRS used by the POs in the PUSCH configurations corresponding to different ROs are different.

In this embodiment, it should be noted that, when it is determined that repeated PUSCH transmission is performed only among a plurality of PUSCH configurations corresponding to random access channel occasions RO of synchronization signal blocks SSB corresponding to the same index in one association period, if the total number of PRACH slots corresponding to ROs corresponding to one SSB is N, at most, a UE transmitting a PRACH in an nth RO may only repeatedly transmit a PUSCH in a PO group corresponding to the nth RO and N-N PO groups subsequently; the repeated sending times of the PUSCH are not more than N-N +1, N is an integer more than or equal to 2, and N is an integer more than 0. It can be understood that for this case, coverage enhancement is achieved by having the UE repeatedly send the PUSCH corresponding to the MsgA on resources between PO groups corresponding to ROs of the same SSB within one association period. Moreover, the method provided by the embodiment does not cause overlapping between POs corresponding to SSBs of different indexes, thereby ensuring beam association between uplink and downlink and ensuring transmission performance. The method of this embodiment is suitable for a case where ROs corresponding to one SSB in one association period are distributed in at least 2 PRACH slots. It can be understood that, for this case, the method of PUSCH configuration indicating PO resources is the same as the prior art, and thus the PUSCH resources used by the coverage enhancement MsgA and the existing MsgA may be either independently configured or shared.

In this embodiment, it should be noted that, when it is determined that repeated PUSCH transmission is performed among a plurality of PUSCH configurations corresponding to ROs of SSBs with the same index in a plurality of association periods, if the number of association periods in one association pattern period is M, at most, a UE that transmits a PRACH by an RO in an mth association period may only repeatedly transmit a PUSCH in a PO group corresponding to an RO in the mth association period and an RO group in a subsequent M-M association periods; and the repeated sending times of the PUSCH are not more than M-M +1, M is an integer more than or equal to 2, and M is an integer more than 0. It can be understood that for this case, coverage enhancement is achieved by having the UE repeatedly send the PUSCH corresponding to MsgA on resources between multiple PO groups corresponding to multiple ROs corresponding to the same SSB over multiple association periods. In this method, the interval of repeated transmission of the PUSCH is long, so a good time domain diversity gain can be obtained, but it is accordingly difficult to perform joint channel estimation using the adjacent PUSCH to improve the channel estimation accuracy. Moreover, the method provided by the embodiment does not cause overlapping between POs corresponding to SSBs of different indexes, thereby ensuring beam association between uplink and downlink and ensuring transmission performance. The method of the embodiment is suitable for the case that a plurality of association periods exist in one association pattern period. It can be understood that, for this case, the method of PUSCH configuration indicating PO resources is the same as the prior art, and thus the PUSCH resources used by the coverage enhancement MsgA and the existing MsgA may be either independently configured or shared.

In this embodiment, it should be noted that, when determining that repeated PUSCH transmission is performed among a plurality of PUSCH configurations corresponding to ROs corresponding to SSBs of the same or different indexes, the DMRS used when the UE transmits the PUSCH in one PO group is determined according to the RO corresponding to the PO group transmitted by the first PUSCH. It can be appreciated that for this case, coverage enhancement is achieved by having the UE repeatedly send the PUSCH for MsgA among multiple PUSCH configurations corresponding to ROs corresponding to SSBs of the same or different indices. The application range of the embodiment is wider, and the embodiment is hardly restricted by the corresponding quantity of SSB, RO and PO groups, so that the resource capable of being repeatedly transmitted is expanded; but also results in overlap between the POs of SSBs of different indices. In order to allow the gNB to distinguish the SSB selected by the UE, DMRSs may be limited to a certain extent, so that even if a PUSCH is transmitted in the same PO group due to repeated transmission by a UE selecting different SSBs for access, different DMRSs may be used, thereby allowing the gNB to distinguish. It can be understood that, for this case, the method of PUSCH configuration indicating PO resources is the same as the prior art, but the correspondence between SSB-RO-POs is changed, and thus is applicable to the case where the coverage enhancement MsgA and the PUSCH resources used by the existing MsgA are configured independently.

Therefore, in the repeated transmission process, the embodiment can ensure the relevance between the SSB and the RO and PO as much as possible, thereby ensuring the correspondence between the uplink and downlink beams and the receiving performance of the base station.

Based on the content of the foregoing embodiment, in this embodiment, the repetition indication information includes: multiplexing indication information, wherein the multiplexing indication information is used for indicating repeated transmission resources of the PUSCH based on the resource configuration mode of the PUSCH.

In this embodiment, unlike the explicit repeat indication information including whether to perform repeat transmission and/or the number of times of repeat transmission, the repeat indication information in this embodiment belongs to implicit repeat indication information, that is, the repeat indication information in this embodiment does not explicitly indicate whether to perform repeat transmission and/or the number of times of repeat transmission, but indicates the repeat transmission resource of the PUSCH based on the resource configuration method of the PUSCH in an implicit manner.

For example, in this embodiment, the repetition indication information may be multiplexing indication information, where the multiplexing indication information is used to indicate the number of PRACH preamble sequences mapped to "frequency domain, DMRS, time domain" resources in the same PO, and further according to the indicated number of PRACH preamble sequences and according to a default formula N_preamble＝ceil(T_preamble/T_PUSCH) The ratio of the PRACH preamble sequence number obtained by calculation can determine the repeated sending times and repeated sending resources of the PUSCH; wherein N is_preambleIndicating the number of PRACH preamble sequences mapped to the same PO; t is_preambleRepresenting the product of the number of valid ROs in an association pattern period and the number of preamble sequences that can be transmitted by each RO, T_PUSCHRepresenting the product of the number of valid POs and the number of DMRSs usable in each PO in an association pattern period; ceil denotes the rounding function.

Based on the content of the foregoing embodiment, in this embodiment, the multiplexing indication information is used to indicate, based on a resource configuration manner of a PUSCH, a preamble sequence number of a physical random access channel PRACH mapped to a same physical uplink shared channel occasion PO; and the preamble sequence number of the Physical Random Access Channel (PRACH) mapped to the same physical uplink shared channel occasion (PO) is used for determining the repeated sending resource of the PUSCH.

In this embodiment, the multiplexing indication information is used to indicate the preamble sequence number of the physical random access channel PRACH mapped to the same physical uplink shared channel occasion PO based on the resource configuration mode of the PUSCH, so as to obtain the preamble sequence number of the physical random access channel PRACH mapped to the same physical uplink shared channel occasion PO and the preamble sequence number of the physical random access channel PRACH mapped to the same physical uplink shared channel occasion PO according to the default formula N_preamble＝ceil(T_preamble/T_PUSCH) Calculated PRACH leader sequenceThe ratio of the numbers can determine the repeated transmission times and the repeated transmission resources of the PUSCH.

For example, in this embodiment, it is assumed that the number of preamble sequences of the PRACH mapped to the same physical uplink shared channel occasion PO is 4 according to the default formula N_preamble＝ceil(T_preamble/T_PUSCH) The calculated PRACH preamble sequence number is 2, then according to N_preamble＝ceil(K*T_preamble/T_PUSCH) It can be seen that K is 2, and K represents a multiple of the multiplexing indication information indication, that is, the number of PRACH preambles of "frequency domain, DMRS, and time domain" multiplexed to the same PO is 2 times that of the case of no repetition.

As shown in fig. 3, a flowchart of steps of a transmission method for coverage enhancement applied to a network device side according to an embodiment of the present application is provided, where the method includes the following steps:

step 201: sending repeated indication information to terminal equipment (UE); the repeated indication information is used for indicating the UE to repeatedly send a Physical Uplink Shared Channel (PUSCH) corresponding to a first message, and the first message is used for two-step random access.

In this step, the network device sends repeat instruction information to the terminal device UE; the repeated indication information is used for indicating the UE to repeatedly send a Physical Uplink Shared Channel (PUSCH) corresponding to a first message, and the first message is used for two-step random access.

According to the transmission method for coverage enhancement provided by the embodiment of the application, the terminal equipment UE can repeatedly send the physical uplink shared channel PUSCH corresponding to the first message for two-step random access by sending the repeated indication information to the terminal equipment UE, so that the coverage performance of the uplink channel in the random access stage can be effectively enhanced, and the problem that the coverage performance of the uplink channel in the random access stage is poor in the prior art can be solved.

Based on the content of the foregoing embodiment, in this embodiment, the repetition indication information is further used to indicate resources used by the UE to repeatedly transmit the PUSCH corresponding to the first message.

In this embodiment, the repetition indication information is further used to indicate resources used by the UE to repeatedly send the PUSCH corresponding to the first message, so that after receiving the repetition indication information sent by the network device, the UE may determine, according to the repetition indication information, resources used to repeatedly send the PUSCH corresponding to the first message, and repeatedly send the PUSCH corresponding to the first message in the resources. Specifically, after receiving the repetition indication information sent by the network device, the UE specifically indicates the resource required for repeatedly sending the PUSCH corresponding to the first message, and in this case, the UE repeatedly sends the PUSCH corresponding to the first message according to the resource specifically indicated in the repetition indication information. In addition, in the actual processing, there is also a case where the resource required for repeatedly transmitting the PUSCH corresponding to the first message is not specifically indicated in the repetition indication information, and only the number of times of repeated transmission is given, and in this case, the UE may perform repeated transmission of the PUSCH corresponding to the first message on the resource corresponding to the number of times of repeated transmission, which is predetermined according to the protocol.

Based on the content of the foregoing embodiment, in this embodiment, the resources required for repeatedly transmitting the PUSCH corresponding to the first message include one or more of the following:

or the like, or, alternatively,

Based on the content of the foregoing embodiment, in this embodiment, the performing repeated PUSCH transmission in a plurality of POs corresponding to a plurality of PUSCH configurations includes any one of the following manners:

In this embodiment, it should be noted that, when determining that repeated PUSCH transmission is performed among a plurality of PUSCH configurations corresponding to ROs corresponding to SSBs of the same or different indexes, the DMRS used when the UE transmits the PUSCH in one PO group is determined according to the RO corresponding to the PO group transmitted by the first PUSCH. It can be appreciated that for this case, coverage enhancement is achieved by having the UE repeatedly send the PUSCH for MsgA among multiple PUSCH configurations corresponding to ROs corresponding to SSBs of the same or different indices. The application range of the embodiment is wider, and the embodiment is hardly restricted by the corresponding quantity of SSB, RO and PO groups, so that the resource capable of being repeatedly transmitted is expanded; but also results in overlap between the POs of SSBs of different indices; however, in order to allow the gNB to distinguish the SSB selected by the UE, DMRSs may be limited to a certain extent, so that even if a PUSCH is transmitted in the same PO group due to repeated transmission by a UE selecting different SSBs for access, different DMRSs may be used, so that the gNB may distinguish. It can be understood that, for this case, the method of PUSCH configuration indicating PO resources is the same as the prior art, but the correspondence between SSB-RO-POs is changed, and thus is applicable to the case where the coverage enhancement MsgA and the PUSCH resources used by the existing MsgA are configured independently.

For example, in this embodiment, the repetition indication information may be multiplexing indication information, where the multiplexing indication information is used to indicate the number of PRACH preamble sequences mapped to "frequency domain, DMRS, time domain" resources in the same PO, and further according to the indicated number of PRACH preamble sequences and according to a default formula N_preamble＝ceil(T_preamble/T_PUSCH) The calculated ratio of the number of the PRACH preamble sequences can determine the repeated sending times and repeated sending resources of the PUSCH.

In this embodiment, the multiplexing indication information is used to indicate the preamble sequence number of the physical random access channel PRACH mapped to the same physical uplink shared channel occasion PO based on the resource configuration mode of the PUSCH, so as to obtain the preamble sequence number of the physical random access channel PRACH mapped to the same physical uplink shared channel occasion PO and the preamble sequence number of the physical random access channel PRACH mapped to the same physical uplink shared channel occasion PO according to the default formula N_preamble＝ceil(T_preamble/T_PUSCH) Calculated PRACH preamble sequence numberRatio, the number of repeated transmissions of the PUSCH and the repeated transmission resources may be determined.

Based on the content of the foregoing embodiment, in this embodiment, the coverage enhancement transmission method further includes:

In this embodiment, after the network device sends the repeat indication information to the UE, the UE may perform repeat sending of a PUSCH corresponding to the first message in a resource indicated by the network device, and the network device may receive the PUSCH repeatedly sent by the UE in the indicated resource, so as to enhance the coverage performance of an uplink channel in a random access phase.

It should be noted that the embodiment of the present application is mainly applied to a 5G NR system, which includes a network device (e.g., a base station, a gNB) and a terminal device (UE); in addition, the method and the device can also be applied to other systems as long as the terminal equipment needs to initiate random access to the network equipment. Fig. 4 gives an illustration of a suitable scenario for the present application. As shown in fig. 4, a plurality of UEs, including UE1 and UE2, initiate random access to the gNB to apply for wireless network connection services; the gNB receives a random access request from at least one UE and performs wireless service for the random access request. Data interaction and transmission are carried out between the gNB and the UE1 and the UE2 through wireless communication.

The present application will be specifically described below with reference to specific examples.

The first embodiment:

as shown in fig. 5, fig. 6, and fig. 7, in this embodiment, the PUSCH of the MsgA is repeatedly transmitted only in a PO group corresponding to one PUSCH configuration or corresponding to the same PRACH slot, and the embodiment specifically includes the following steps:

step 1: the gNB sends MsgA repeated indication information;

step 2: the gNB sends MsgA repeated indication information;

and step 3: the UE receives the MsgA repeated indication information sent by the gNB, determines the PUSCH resource for sending the MsgA, and repeatedly sends the MsgA (the PUSCH part in the MsgA)

And 4, step 4: the gNB receives the UE (repeated) transmitted MsgA on the corresponding resource on which the UE transmitted the MsgA.

It should be noted that, for step 1 and step 2, the MsgA repeat instruction Information sent by the gNB may be sent by broadcasting, for example, the Information is carried in a System Information Block1 (SIB 1) and sent by broadcasting, and a plurality of UEs may receive the Information; the indication information may also be sent in unicast, for example, sent to the UE through higher layer signaling, such as Radio Resource Control (RRC) signaling. Furthermore, the MsgA duplication instruction message may be a sub-message of the MsgA configuration message, or may be a message independent of the MsgA configuration message, which is sent by the gNB to the UE in the prior art. Accordingly, the UE receives the MsgA repeat indication information sent by the gNB.

In step 3, the PUSCH resources for determining MsgA according to the MsgA repeat instruction information include both a display instruction and an implicit instruction.

The following first explains a case of displaying an instruction. Specifically, the MsgA repetition indication information explicitly indicates whether MsgA is repeated or not, and/or the number of repetitions of PUSCH:

if only MsgA repetition is shown or not, the UE may determine a resource for repeatedly sending MsgA based on a predefined rule, for example, the number of times of predefined repeated sending is 2 or 4 or other positive integer greater than 1, or the number of times of repeated sending is determined based on a corresponding relationship between the received SSB signal strength and a predefined "SSB signal strength — number of times of repetition";

if only the number of repetitions of the PUSCH is indicated, a specific number of repetitions may be indicated, such as one of "1, 2, 4", where indicating "1" means no repeated transmission is performed;

if the MsgA repetition or not and the PUSCH repetition number are indicated, the MsgA repetition or the PUSCH repetition number may be a combination of the MsgA repetition or the MsgA repetition number and the PUSCH repetition number;

as shown in fig. 5 and fig. 6, after determining the number of repetitions, the UE needs to determine the final transmission resource according to the "PO resource for single transmission (when there is no repetition)". It should be noted that the PO resource of a single transmission (when there is no repetition) can be determined according to the MsgA configuration information in the prior art.

For the mode shown in fig. 5, after all the preamble sequences in one PRACH slot complete a round of mapping from all the PRACH preamble sequences to the frequency domain, DMRS, and time domain of the PO, the mapping continues for the next round until K times are repeated (2 times are used as an example in fig. 5), where K is the number of times of repetition determined according to the MsgA repetition indication information.

For the method shown in fig. 6, after the PRACH preamble sequence in one PRACH slot is mapped to the frequency domain of the PO and the DMRS, K times of repetition in the time domain are preferentially performed (2 times are used as an example in fig. 6), and then the PO time domain is mapped, including mapping to the PO in one PUSCH slot and further mapping to multiple PUSCH slots.

In addition to the methods shown in fig. 5 and fig. 6, in another method, the repetition indication information may indicate respective repetition transmission resources of a plurality of POs in one PUSCH configuration (i.e., a PO group). In this method, the following process may be included:

A. treating the POs with the same frequency location as a subset;

B. in each subgroup, the i-th PO in each subgroup PO has the same repetition number, which is Ki, so the repetition indication information performs time domain resource indication of each PO, e.g., indicating that the i-th PO in each PO group has repetition number of { K1, K2 … Ki … }; for another example, the number of repetitions of the ith PO in each subgroup PO may be different, and the repetition indication information needs to indicate the number of repetitions for each PO in each PO subgroup, such as K11, K12, … K1i …, Kj1, Kj2, … Kji …, so as to indicate the number of repetitions of the ith PO in the jth subgroup as Kji, as shown in fig. 7.

C. In each subgroup, the time domain start position of the following PO needs to be determined according to the end position of the preceding PO, for example, the start position of the following PO is the end position of the last repetition of the preceding PO plus a predefined time domain interval.

The above description is a description of the case of the display instruction, and the following description is a description of the case of the implicit instruction. Specifically, in the method of implicit indication, similar to the methods shown in fig. 5 and fig. 6 of the above-mentioned explicit indication method, the UE still needs to determine the PO resource of a single transmission (when not repeated), and the number of repetitions, to determine the transmission resource of the PUSCH of MsgA. For example, the repetition indication information may be multiplexing indication information indicating the number of PRACH preamble sequences mapped to "frequency domain, DMRS, time domain" resources in the same PO. For example, in the prior art, the PRACH preamble sequence number of "frequency domain, DMRS, time domain" resources mapped to the same PO is according to the formula N_preamble＝ceil(T_preamble/T_PUSCH) Calculated, and in the present method, N_preamble＝ceil(K*T_preamble/T_PUSCH) Wherein K is a multiple of the multiplexing indication information indication; for example, K is 2, which indicates that the number of PRACH preambles of "frequency domain, DMRS, time domain" multiplexed to the same PO is 2 times that of the case without repetition; the mapping is then performed according to the methods of fig. 5 and 6.

For step 4, the gNB may detect PUSCH in multiple POs from MsgA repeatedly sent by the same UE. The PUSCH resource of MsgA that one UE can repeatedly send is determined according to the method in step 3.

In summary, in this embodiment, by an explicit or implicit method, the gNB may instruct the UE to send the PUSCH of the MsgA in multiple POs, and the number of repetitions of the multiple POs may be the same or different; after the UE sends the PUSCH of the MsgA in multiple POs, the gNB may perform joint detection or joint demodulation on the PUSCH of the MsgA from the same UE in multiple POs, so as to improve detection or demodulation performance, and achieve coverage enhancement.

In the present embodiment, since a PO resource indication scheme different from the conventional scheme is adopted, the PUSCH configuration indication information is difficult to multiplex, and therefore, the present embodiment is suitable for covering a case where the PUSCH resources used by the enhanced MsgA and the conventional MsgA are independently configured.

Second embodiment:

in this embodiment, MsgA may repeatedly transmit in POs corresponding to a plurality of PUSCH configurations, and may repeatedly transmit only between a plurality of PUSCH configurations corresponding to ROs of SSBs corresponding to the same index in one association period. The method in the first embodiment can be referred to in step 1, step 2, and step 4, the difference is mainly in step 3, and step 3 is described in this embodiment with emphasis.

The association period is an association period that indicates a length of time required for a group of SSBs to complete once "SSBs all having different indexes are mapped at least once into ROs" (shown with reference to fig. 1). In this embodiment, the UE may repeatedly send, in one association period, a plurality of PUSCH configurations (each PUSCH configuration corresponds to one group of POs) corresponding to ROs of SSBs with the same index, as shown in fig. 8:

as shown in fig. 8, the SSB0 corresponds to at least 2 ROs, and the 2 ROs (RO 0 and RO1, respectively) are in different PRACH slots, each corresponding to one PUSCH configuration (PO group). At this time, for a UE that selects RO0 corresponding to SSB0 to transmit a PRACH of MsgA, the PUSCH of MsgA may be transmitted in a PO group corresponding to RO0 and a PO group corresponding to RO1, and for example, the UE may repeatedly transmit the PUSCH in PO0 of the first PO group and PO0 of the second PO group.

In this embodiment, if the total number of PRACH slots corresponding to an RO corresponding to one SSB is N, at most, a UE that transmits a PRACH in an nth RO can only repeatedly transmit a PUSCH in a PO group corresponding to the nth RO and subsequent N-N PO groups. In this case, the repetition indication information may only indicate whether to repeat or not, and the number of repetitions may be a predefined number not greater than N-N +1, for example, defined directly as the number of repetitions of the MsgA PUSCH transmitted in the nth PO group being N-N + 1; a specific number of repetitions K may also be indicated, but the actual number of repetitions for PUSCH transmission is not greater than N-N +1, i.e., the actual number of repetitions is min { K, N-N +1}, N is an integer greater than or equal to 2, and N is an integer greater than 0.

In this embodiment, coverage enhancement is implemented by allowing the UE to repeatedly send the PUSCH corresponding to the MsgA on resources between multiple PO groups corresponding to multiple ROs of the same SSB in one association period. The method of this embodiment is suitable for a case where ROs corresponding to one SSB in one association period are distributed in at least 2 PRACH slots.

In this embodiment, since the method of indicating the PO resource by PUSCH configuration is the same as that of the related art, the PUSCH resource used by the coverage enhancement MsgA and the related MsgA may be configured independently or shared.

The third embodiment:

in this embodiment, MsgA may repeatedly transmit in POs corresponding to a plurality of PUSCH configurations, and repeatedly transmit between a plurality of PUSCH configurations (PO groups) corresponding to ROs of SSBs corresponding to the same index in a plurality of association periods. The method in the first embodiment can be referred to in step 1, step 2, and step 4, the difference is mainly in step 3, and step 3 is described in this embodiment with emphasis.

As shown in fig. 9, it is assumed that 4 SSBs correspond to RO0, RO1, RO2, and RO3, respectively, in one association period, and the number of repetitions is 2. Taking the example of UE selection SSB0, the UE may send MsgA PRACH pilot at RO0 in the first association period, and send MsgA PUSCH repeatedly at the first association period in the PO group corresponding to RO0 and at the second association period in the PO group corresponding to RO 0.

In this embodiment, if the number of association cycles in one association pattern period is M, at most, a UE that sends a PRACH by an RO in an mth association period can only repeatedly send a PUSCH by a PO group corresponding to the RO in the mth association period and by an RO group in a subsequent M-M association periods. In this case, the repetition indication information may only indicate whether to repeat or not, and the number of repetitions may be a predefined number not greater than M-M +1, for example, defined directly as the number of repetitions of the MsgA PUSCH transmitted at the beginning in the M-th association period being M-M + 1; a specific number of repetitions K may also be indicated, but the number of actual repeated transmissions of PUSCH is not greater than M-M +1, i.e., the actual number of repetitions is min { K, M-M +1}, M is an integer greater than or equal to 2, and M is an integer greater than 0.

In this embodiment, coverage enhancement is achieved by having the UE repeatedly send the PUSCH corresponding to the MsgA on resources between multiple PO groups corresponding to multiple ROs that correspond to the same SSB over multiple association periods. In this method, the interval of repeated transmission of the PUSCH is long, so a good time domain diversity gain can be obtained, but it is accordingly difficult to perform joint channel estimation using the adjacent PUSCH to improve the channel estimation accuracy. Moreover, the method provided by the embodiment does not cause overlapping between POs corresponding to SSBs of different indexes, thereby ensuring beam association between uplink and downlink and ensuring transmission performance. The method of the embodiment is suitable for the case that a plurality of association periods exist in one association pattern period.

In this embodiment, since the method of indicating the PO resource by PUSCH configuration is the same as that of the related art, the PUSCH resource used by the coverage enhancement MsgA and the related MsgA may be independently configured or shared.

The fourth embodiment:

in this embodiment, MsgA may perform repeated transmission in POs corresponding to a plurality of PUSCH configurations, and in particular, may perform repeated transmission between a plurality of PUSCH configurations corresponding to ROs corresponding to SSBs of the same or different indices.

As shown in fig. 10, one SSB corresponds to 4 ROs, and the PUSCH repetition number of MsgA is 2. The PUSCH of MsgA may be repeated not only in different PO groups corresponding to ROs corresponding to the same SSB, but also in different PO groups corresponding to ROs corresponding to SSBs of different indexes. For example, if a UE selects SSB0 and sends MsgA's PRACH pilot in RO3 corresponding to SSB0, the UE may repeatedly send MsgA's PUSCH in the PO group corresponding to RO3 corresponding to SSB0 and the PO group corresponding to RO4 corresponding to SSB 1.

In this embodiment, in one association pattern period, for all ROs corresponding to SSBs, the UE sends the MsgA PRACH pilot in the ith RO, and may repeatedly send the MsgA PUSCH in the PO group corresponding to the ith, i +1, and … … (i + k-1) th ROs. Further, in order to make it clear that the gNB can distinguish which SSB is selected by the UE initiating random access, but the PUSCH transmitted in the same PO group may be transmitted by the UE selecting a different SSB (e.g. the PO group corresponding to RO4 in fig. 10), it may be specified that the DMRS when the UE transmits PUSCH in one PO group is always determined according to the "RO corresponding to the PO group transmitted by the first PUSCH", so that the MsgA initiated by selecting a different SSB uses a different DMRS (refer to the PO group corresponding to RO4 in fig. 10).

The scheme in this embodiment may be used for one association period, and may also be extended to different association periods of one association pattern period, and the method and the principle are similar and will not be described again.

In this embodiment, coverage enhancement is achieved by having the UE repeatedly send the PUSCH corresponding to MsgA among a plurality of PUSCH configurations corresponding to ROs corresponding to SSBs of the same or different indices. The application range of the embodiment is wider, and the embodiment is hardly restricted by the corresponding quantity of SSB, RO and PO groups, so that the resource capable of being repeatedly transmitted is expanded; but also results in overlap between the POs of SSBs of different indices; however, in order to allow the gNB to distinguish the SSB selected by the UE, DMRSs may be limited to a certain extent, so that even if a PUSCH is transmitted in the same PO group due to repeated transmission by a UE selecting different SSBs for access, different DMRSs may be used, so that the gNB may distinguish.

In the present embodiment, the method of indicating the PO resource by PUSCH configuration is the same as that of the related art, but the correspondence relationship between SSB-RO-PO is changed, and therefore, the present invention is applied to a case where the PUSCH resource used by the coverage enhancement MsgA and the related MsgA is configured independently.

Fifth embodiment:

in the above embodiments, the first embodiment is PUSCH repeated transmission within a PO group, and the second, third, and fourth embodiments are PUSCH repeated transmission between PO groups. Actually, the PUSCH repetition transmission of MsgA may be extended to "the transmission may be repeated simultaneously within and between PO groups", that is, the first embodiment may be combined with the second embodiment, the first embodiment may be combined with the third embodiment, or the first embodiment may be combined with the fourth embodiment. In this case, the repetition indication information may indicate the number of repeated transmissions within a PO group and between PO groups, respectively; it is also possible to indicate only one uniform repetition number K, and the UE can perform the K repeated transmission of the PUSCH of MsgA at most between transmittable PUSCH resources constituted by all PO groups and PO groups.

Therefore, the method in the embodiment further expands the resource for repeatedly sending the PUSCH by the UE, and improves the coverage performance.

It should be noted that, in the prior art, repeated PUSCH transmission by MsgA is not supported. The application provides a method for repeatedly sending the PUSCH of the MsgA, so that the terminal equipment can acquire the resource of the PUSCH repeatedly sending the MsgA before accessing the network equipment, and the coverage of the PUSCH repeatedly sending the MsgA by the terminal can be improved.

In addition, as shown in fig. 11, a block diagram of a transmission apparatus for coverage enhancement applied to a terminal device in the embodiment of the present application is shown, where the apparatus includes:

a receiving module 11, configured to receive repetition indication information sent by a network device; the repeated indication information is used for indicating the terminal equipment UE to repeatedly send a Physical Uplink Shared Channel (PUSCH) corresponding to a first message, and the first message is used for two-step random access;

a determining module 12, configured to determine, according to the repetition indication information, a resource used for repeatedly sending a PUSCH corresponding to the first message, and repeatedly send a PUSCH corresponding to the first message in the resource.

It should be noted that, the apparatus can implement all the method steps of the transmission method embodiment for coverage enhancement applied to the terminal device and can achieve the same technical effect, and details are not repeated herein.

In addition, as shown in fig. 12, a block diagram of a transmission apparatus for coverage enhancement applied to a network device in the embodiment of the present application is shown, where the apparatus includes:

a sending module 21, configured to send repeat indication information to a terminal device UE; the repeated indication information is used for indicating the UE to repeatedly send a Physical Uplink Shared Channel (PUSCH) corresponding to a first message, and the first message is used for two-step random access.

It should be noted that, the apparatus can implement all the method steps of the coverage enhancement transmission method embodiment applied to the network device and achieve the same technical effect, and details are not repeated herein.

Fig. 13 is a schematic structural diagram of a terminal device according to an embodiment of the present application, which includes a memory 1320, a transceiver 1300, and a processor 1310.

In fig. 13, among other things, the bus architecture may include any number of interconnected buses and bridges with various circuits being linked together, particularly one or more processors represented by processor 1310 and memory represented by memory 1320. The bus architecture may also link together various other circuits such as peripherals, voltage regulators, power management circuits, and the like, which are well known in the art, and therefore, will not be described any further herein. The bus interface provides an interface. The transceiver 1300 may be a plurality of elements including a transmitter and a receiver that provide a means for communicating with various other apparatus over a transmission medium including wireless channels, wired channels, fiber optic cables, and the like. The processor 1310 is responsible for managing the bus architecture and general processing, and the memory 1320 may store data used by the processor 1310 in performing operations.

The processor 1310 may be a Central Processing Unit (CPU), an Application Specific Integrated Circuit (ASIC), a Field Programmable Gate Array (FPGA), or a Complex Programmable Logic Device (CPLD), and may also have a multi-core architecture.

A memory 1320 for storing computer programs; a transceiver 1300 for transceiving data under the control of the processor; a processor 1310 for reading the computer program in the memory and performing the following operations:

Based on the content of the foregoing embodiment, in this embodiment, the repetition indication information includes: whether to perform repeated transmission, and/or the number of repeated transmission.

It should be noted that the terminal device provided in the embodiment of the present application can implement all the method steps of the coverage enhancement transmission method embodiment applied to the terminal device and can achieve the same technical effect, and details are not described herein again.

Fig. 14 is a schematic structural diagram of a network device according to an embodiment of the present invention, which includes a memory 1420, a transceiver 1400, and a processor 1410.

In fig. 14, among other things, the bus architecture may include any number of interconnected buses and bridges, with one or more processors, represented by processor 1410, and various circuits, represented by memory 1420, linked together. The bus architecture may also link together various other circuits such as peripherals, voltage regulators, power management circuits, and the like, which are well known in the art, and therefore, will not be described any further herein. The bus interface provides an interface. The transceiver 1400 may be a number of elements including a transmitter and a receiver that provide a means for communicating with various other apparatus over a transmission medium including wireless channels, wired channels, fiber optic cables, and the like. The processor 1410 is responsible for managing the bus architecture and general processing, and the memory 1420 may store data used by the processor 1410 in performing operations.

The processor 1410 may be a Central Processing Unit (CPU), an Application Specific Integrated Circuit (ASIC), a Field Programmable Gate Array (FPGA), or a Complex Programmable Logic Device (CPLD), and may also have a multi-core architecture.

A memory 1420 for storing a computer program; a transceiver 1400 for transceiving data under the control of the processor; a processor 1410 configured to read the computer program in the memory and perform the following operations:

Based on the content of the foregoing embodiment, in this embodiment, optionally, the repetition indication information includes:

Based on the content of the foregoing embodiment, in this embodiment, optionally, the repetition indication information is further used to indicate resources used by the UE to repeatedly send the PUSCH corresponding to the first message.

Based on the content of the foregoing embodiment, in this embodiment, optionally, the resource required for repeatedly transmitting the PUSCH corresponding to the first message includes one or more of the following:

Based on the content of the foregoing embodiment, in this embodiment, optionally, the performing repeated transmission of the PUSCH in the POs corresponding to the PUSCH configurations includes any one of the following manners:

Based on the content of the foregoing embodiment, in this embodiment, optionally, the repetition indication information includes: multiplexing indication information, wherein the multiplexing indication information is used for indicating repeated transmission resources of the PUSCH based on the resource configuration mode of the PUSCH.

Based on the content of the foregoing embodiment, in this embodiment, optionally, the multiplexing indication information is used to indicate, based on a resource configuration manner of a PUSCH, a preamble sequence number of a physical random access channel PRACH mapped to a same physical uplink shared channel occasion PO; and the preamble sequence number of the Physical Random Access Channel (PRACH) mapped to the same physical uplink shared channel occasion (PO) is used for determining the repeated sending resource of the PUSCH.

Based on the content of the foregoing embodiment, in this embodiment, optionally, the processor, when executing the computer program, is further configured to implement the following steps:

It should be noted that the network device provided in this embodiment can implement all the method steps of the coverage enhancement transmission method embodiment applied to the network device and can achieve the same technical effect, and details are not repeated herein.

It should be noted that the division of the unit in the embodiment of the present application is schematic, and is only a logic function division, and there may be another division manner in actual implementation. In addition, functional units in the embodiments of the present application may be integrated into one processing unit, or each unit may exist alone physically, or two or more units are integrated into one unit. The integrated unit can be realized in a form of hardware, and can also be realized in a form of a software functional unit.

The integrated unit, if implemented as a software functional unit and sold or used as a stand-alone product, may be stored in a processor readable storage medium. Based on such understanding, the technical solution of the present application may be substantially implemented or contributed by the prior art, or all or part of the technical solution may be embodied in a software product, which is stored in a storage medium and includes instructions for causing a computer device (which may be a personal computer, a server, a network device, or the like) or a processor (processor) to execute all or part of the steps of the method according to the embodiments of the present application. And the aforementioned storage medium includes: various media capable of storing program codes, such as a usb disk, a removable hard disk, a Read-Only Memory (ROM), a Random Access Memory (RAM), a magnetic disk, or an optical disk.

It should be noted that the apparatus provided in the embodiment of the present application can implement all the method steps implemented by the method embodiment and achieve the same technical effect, and detailed descriptions of the same parts and beneficial effects as the method embodiment in this embodiment are omitted here.

On the other hand, the embodiment of the present application further provides a processor-readable storage medium, where a computer program is stored, and the computer program is used to enable the processor to execute the method described in the foregoing embodiment.

The processor-readable storage medium can be any available medium or data storage device that can be accessed by a processor, including, but not limited to, magnetic memory (e.g., floppy disks, hard disks, magnetic tape, magneto-optical disks (MOs), etc.), optical memory (e.g., CDs, DVDs, BDs, HVDs, etc.), and semiconductor memory (e.g., ROMs, EPROMs, EEPROMs, non-volatile memory (NAND FLASH), Solid State Disks (SSDs)), etc.

As seen from the above embodiments, a processor-readable storage medium stores a computer program for causing the processor to perform the steps of the above coverage enhanced transmission method, such as performing: receiving repeated indication information sent by network equipment; the repeated indication information is used for indicating the terminal equipment UE to repeatedly send a Physical Uplink Shared Channel (PUSCH) corresponding to a first message, and the first message is used for two-step random access; and determining resources for repeatedly sending the PUSCH corresponding to the first message according to the repeated indication information, and repeatedly sending the PUSCH corresponding to the first message in the resources.

Or performing:

As will be appreciated by one skilled in the art, embodiments of the present application may be provided as a method, system, or computer program product. Accordingly, the present application may take the form of an entirely hardware embodiment, an entirely software embodiment or an embodiment combining software and hardware aspects. Furthermore, the present application may take the form of a computer program product embodied on one or more computer-usable storage media (including, but not limited to, disk storage, optical storage, and the like) having computer-usable program code embodied therein.

The present application is described with reference to flowchart illustrations and/or block diagrams of methods, apparatus (systems), and computer program products according to embodiments of the application. It will be understood that each flow and/or block of the flow diagrams and/or block diagrams, and combinations of flows and/or blocks in the flow diagrams and/or block diagrams, can be implemented by computer-executable instructions. These computer-executable instructions may be provided to a processor of a general purpose computer, special purpose computer, embedded processor, or other programmable data processing apparatus to produce a machine, such that the instructions, which execute via the processor of the computer or other programmable data processing apparatus, create means for implementing the functions specified in the flowchart flow or flows and/or block diagram block or blocks.

These processor-executable instructions may also be stored in a processor-readable memory that can direct a computer or other programmable data processing apparatus to function in a particular manner, such that the instructions stored in the processor-readable memory produce an article of manufacture including instruction means which implement the function specified in the flowchart flow or flows and/or block diagram block or blocks.

These processor-executable instructions may also be loaded onto a computer or other programmable data processing apparatus to cause a series of operational steps to be performed on the computer or other programmable apparatus to produce a computer implemented process such that the instructions which execute on the computer or other programmable apparatus provide steps for implementing the functions specified in the flowchart flow or flows and/or block diagram block or blocks.

It will be apparent to those skilled in the art that various changes and modifications may be made in the present application without departing from the spirit and scope of the application. Thus, if such modifications and variations of the present application fall within the scope of the claims of the present application and their equivalents, the present application is intended to include such modifications and variations as well.

Claims

1. A method for transmission with coverage enhancement, comprising:

2. The transmission method of coverage enhancement according to claim 1, wherein the repetition indication information comprises:

3. The transmission method of coverage enhancement according to claim 1 or 2, wherein determining resources for repeatedly transmitting the PUSCH corresponding to the first message according to the repetition indication information, and repeatedly transmitting the PUSCH corresponding to the first message in the resources comprises one or more of the following ways:

4. The transmission method of claim 3, wherein the determining that the PUSCH is repeatedly transmitted in a plurality of POs corresponding to a plurality of PUSCH configurations comprises any one of the following methods:

5. The transmission method of coverage enhancement according to claim 1, wherein the repetition indication information comprises: multiplexing indication information, wherein the multiplexing indication information is used for indicating repeated transmission resources of the PUSCH based on the resource configuration mode of the PUSCH.

6. The transmission method of coverage enhancement according to claim 5, wherein the multiplexing indication information is used to indicate the number of preamble sequences of Physical Random Access Channel (PRACH) mapped to the same physical uplink shared channel occasion (PO) based on the resource allocation manner of PUSCH; and the preamble sequence number of the Physical Random Access Channel (PRACH) mapped to the same physical uplink shared channel occasion (PO) is used for determining the repeated sending resource of the PUSCH.

7. A method for transmission with coverage enhancement, comprising:

8. The transmission method of coverage enhancement according to claim 7, wherein the repetition indication information comprises:

9. The transmission method of coverage enhancement according to claim 7 or 8, wherein the repetition indication information is further used for indicating resources used by the UE to repeatedly transmit PUSCH corresponding to the first message.

10. The transmission method of claim 9, wherein the resources required for repeatedly transmitting the PUSCH corresponding to the first message include one or more of the following:

11. The transmission method for coverage enhancement according to claim 10, wherein the repeated transmission of the PUSCH in the POs corresponding to the PUSCH configurations comprises any one of the following manners:

12. The transmission method of coverage enhancement according to claim 7, wherein the repetition indication information comprises: multiplexing indication information, wherein the multiplexing indication information is used for indicating repeated transmission resources of the PUSCH based on the resource configuration mode of the PUSCH.

13. The transmission method of coverage enhancement according to claim 12, wherein the multiplexing indication information is used to indicate the number of preamble sequences of a physical random access channel PRACH mapped to the same physical uplink shared channel occasion PO based on the resource configuration mode of the PUSCH; and the preamble sequence number of the Physical Random Access Channel (PRACH) mapped to the same physical uplink shared channel occasion (PO) is used for determining the repeated sending resource of the PUSCH.

14. The method for transmission with enhanced coverage according to claim 9, further comprising:

15. A transmission apparatus with coverage enhancement, comprising:

16. A transmission apparatus with coverage enhancement, comprising:

17. A terminal device comprising a memory, a processor and a computer program stored on the memory and executable on the processor, wherein the processor implements the following steps when executing the computer program:

18. The terminal device according to claim 17, wherein the repetition indication information comprises: whether to perform repeated transmission, and/or the number of repeated transmission.

19. The terminal device according to claim 17 or 18, wherein determining resources for repeatedly transmitting the PUSCH corresponding to the first message according to the repetition indication information, and repeatedly transmitting the PUSCH corresponding to the first message in the resources comprises one or more of the following manners:

20. The terminal device of claim 19, wherein the determining that the PUSCH repetition transmission is performed in a plurality of POs corresponding to a plurality of PUSCH configurations comprises any one of:

21. The terminal device according to claim 17, wherein the repetition indication information comprises: multiplexing indication information, wherein the multiplexing indication information is used for indicating repeated transmission resources of the PUSCH based on the resource configuration mode of the PUSCH.

22. The terminal device of claim 21, wherein the multiplexing indication information is used to indicate, based on a resource allocation manner of a PUSCH, a preamble sequence number of a physical random access channel PRACH mapped to a same physical uplink shared channel occasion PO; and the preamble sequence number of the Physical Random Access Channel (PRACH) mapped to the same physical uplink shared channel occasion (PO) is used for determining the repeated sending resource of the PUSCH.

23. A network device comprising a memory, a processor, and a computer program stored on the memory and executable on the processor, wherein the processor when executing the computer program implements the steps of:

24. The network device of claim 23, wherein the repetition indication information comprises:

25. The network device according to claim 23 or 24, wherein the repetition indication information is further used for indicating resources used by the UE to repeatedly transmit the PUSCH corresponding to the first message.

26. The network device of claim 25, wherein the resources required for repeatedly transmitting the PUSCH corresponding to the first message include one or more of:

27. The network device of claim 26, wherein the repeated transmission of the PUSCH in the POs corresponding to the PUSCH configurations comprises any one of:

28. The network device of claim 23, wherein the repetition indication information comprises: multiplexing indication information, wherein the multiplexing indication information is used for indicating repeated transmission resources of the PUSCH based on the resource configuration mode of the PUSCH.

29. The network device of claim 28, wherein the multiplexing indication information is used to indicate, based on a resource allocation manner of a PUSCH, a preamble sequence number of a physical random access channel PRACH mapped to a same physical uplink shared channel occasion PO; and the preamble sequence number of the Physical Random Access Channel (PRACH) mapped to the same physical uplink shared channel occasion (PO) is used for determining the repeated sending resource of the PUSCH.

30. The network device of claim 25, wherein the processor, when executing the computer program, is further configured to perform the steps of:

31. A non-transitory computer readable storage medium, having stored thereon a computer program, which, when being executed by a processor, carries out the steps of the coverage enhanced transmission method according to any one of claims 1 to 6, or the steps of the coverage enhanced transmission method according to any one of claims 7 to 14.