CN114390714B

CN114390714B - Coverage enhancement transmission method, coverage enhancement transmission device, terminal equipment, network equipment and medium

Info

Publication number: CN114390714B
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: 2024-04-09
Anticipated expiration: 2040-10-16
Also published as: WO2022078131A1; CN114390714A

Abstract

The embodiment of the application provides a coverage enhancement transmission method, a coverage enhancement transmission device, terminal equipment, network equipment and a medium, wherein the coverage enhancement transmission 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

Coverage enhancement transmission method, coverage enhancement transmission device, terminal equipment, network equipment and medium

Technical Field

The present disclosure relates to the field of communications technologies, and in particular, to a coverage-enhanced transmission method, apparatus, terminal device, network device, and medium.

Background

In a New wireless NR (New Radio) system, with an increase in the deployment frequency of the wireless system, propagation loss of wireless signals is increased, resulting in a reduction in the transmission distance of signals and a decrease in coverage performance of the network. Especially for uplink transmission, that is, transmission sent by a terminal Equipment (UE) and received by a base station (g Node B, gNB), the coverage of an uplink channel is more limited than that of a downlink because the transmission power of the UE is low.

The NR supports random access in a two-step random access channel (2-step Random Access Channel,2-step RACH). At present, in the random access stage, the coverage performance of an uplink channel is relatively poor, and because whether the random access is successful or not directly affects whether the UE can acquire network services, the coverage performance of the uplink channel in the random access stage needs to be enhanced.

Disclosure of Invention

The embodiment of the application provides a coverage enhancement transmission method, a coverage enhancement transmission device, terminal equipment, network equipment and a medium, which are used for solving the problem that in the prior art, in a random access stage, the coverage performance of an uplink channel is relatively poor.

In order to solve the above problems, specifically, 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 repeat transmission and/or the number of repeated transmission.

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

determining to perform repeated transmission of the PUSCH only in a plurality of physical uplink shared channel occasions PO corresponding to one PUSCH configuration according to the repeated indication information;

and according to the repetition instruction information, determining to repeatedly send the PUSCH in a plurality of POs corresponding to the plurality of PUSCH configurations.

Optionally, the determining that PUSCH is repeatedly sent in a plurality of POs corresponding to the plurality of PUSCH configurations includes any one of the following modes:

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

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

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

Optionally, the repetition indication information includes: multiplexing indication information, where the multiplexing indication information is used to indicate repeated transmission resources of the PUSCH based on a PUSCH resource allocation mode.

Optionally, the multiplexing indication information is used for indicating the preamble sequence number of the physical random access channel PRACH mapped to the same physical uplink shared channel opportunity PO based on a PUSCH resource allocation mode; the preamble sequence number of the physical random access channel PRACH mapped to the same physical uplink shared channel opportunity PO is used to determine the repeated transmission resource of the PUSCH.

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

sending repeated indication information to terminal equipment (UE); the repetition 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:

whether to repeat transmission and/or the number of repeated transmission.

Optionally, the repetition indication information is further used for indicating resources of PUSCH corresponding to the UE for repeatedly sending the first message.

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

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;

and carrying out repeated transmission of the PUSCH in a plurality of POs corresponding to the plurality of PUSCH configurations.

Optionally, the repeated PUSCH transmission in the plurality of POs corresponding to the plurality of PUSCH configurations includes any one of the following modes:

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

repeatedly sending the 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 repeatedly sending the PUSCH among a plurality of PUSCH configurations corresponding to the RO of the SSB with the same or different indexes, wherein the demodulation reference signals (DMRS) used by the PO in the PUSCH configurations corresponding to the different RO are different.

Optionally, the coverage enhancement 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 coverage-enhanced transmission apparatus, 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 the determining module is used for 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 a fourth aspect, an embodiment of the present application further provides a coverage-enhanced transmission apparatus, including:

a sending module, configured to send repeated indication information to a terminal device UE; the repetition 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, embodiments of the present application further provide 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 repeat transmission and/or the number of repeated transmission.

In a sixth aspect, embodiments of the present application further provide a network device, including a memory, a processor, and a computer program stored on the memory and executable on the processor, the processor implementing the following steps when executing the computer program:

Optionally, the repetition indication information includes:

whether to repeat transmission and/or the number of repeated transmission.

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

In a seventh aspect, embodiments of the present application further provide a processor-readable storage medium storing a computer program for causing the processor to perform the steps of the coverage-enhanced transmission method according to the first or second aspect as described above.

According to the coverage enhancement transmission method, device, terminal equipment, network equipment and medium, by receiving the repeated indication information sent by the network equipment, the terminal equipment UE can repeatedly send the physical uplink shared channel PUSCH corresponding to the first message for two-step random access, 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 in the prior art is poor can be solved.

Drawings

In order to more clearly illustrate the embodiments of the present application or the technical solutions in the prior art, a brief description will be given below of the drawings that are needed in the embodiments or the prior art descriptions, and it is obvious that the drawings in the following description are some embodiments of the present application, and that other drawings can be obtained according to these drawings without inventive effort for a person skilled in the art.

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

fig. 2 is a step flowchart of a coverage enhancement transmission method applied to a terminal device provided in an embodiment of the present application;

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

Fig. 4 is a schematic view of an application scenario provided in an embodiment of the present application;

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

FIG. 6 is a second schematic diagram of determining PO resources for repeated transmission according to the resources for single transmission PO and the MsgA repetition number according to the embodiment of the present application;

fig. 7 is a schematic diagram of determining a repeated transmission resource of PUSCH of MsgA according to the number of repetition indicated by each PO provided in the embodiments of the present application;

fig. 8 is a schematic diagram of repeated transmission of PUSCH of MsgA sent by one UE in multiple PUSCH configurations corresponding to ROs of SSB corresponding to the same index in one association period according to the embodiment of the present application;

fig. 9 is a schematic diagram of repeated transmission of PUSCH of MsgA transmitted by one UE according to an embodiment of the present application between a plurality of PUSCH configurations corresponding to ROs of SSBs corresponding to the same index between different association periods;

fig. 10 is a schematic diagram of repeated transmission of PUSCH of MsgA transmitted by one UE in multiple PUSCH configurations corresponding to ROs corresponding to SSBs with the same or different indexes according to the embodiment of the present application;

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

Fig. 12 is a block diagram of a coverage-enhanced transmission apparatus 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 following description of the technical solutions in the embodiments of the present application will be made clearly and completely with reference to the accompanying drawings in the embodiments of the present application, and it is apparent that the described embodiments are only some embodiments of the present application, but not all embodiments. All other embodiments, which can be made by one of ordinary skill in the art without undue burden from the present disclosure, are within the scope of the present disclosure.

In the 5G New wireless NR (New Radio) system, with an increase in the deployment frequency of the wireless system, propagation loss of the wireless signal increases, and the transmission distance of the signal decreases, and the coverage performance of the network decreases. Especially for uplink transmission, that is, transmission sent by a terminal Equipment (UE) and received by a base station (g Node B, gNB), the coverage of an uplink channel is more limited than that of a downlink because the transmission power of the UE is low.

It can be appreciated that the mechanism of the 2-step RACH can be briefly summarized as:

(1) the gNB broadcasts and transmits one or more synchronous signal blocks (Synchronization Signal Block, SSB), indicates the corresponding relation between the SSB and the random access opportunity (RACH Occasion, RO) through a broadcasted system message block1 (System Information Block, SIB 1), and indicates the transmission resource of the physical uplink shared channel opportunity (PUSCH Occasion, PO) corresponding to the PRACH preamble sequence transmitted in each RO through PUSCH configuration information;

(2) the UE can measure the signal strength of a plurality of SSB, select one SSB with the received signal strength higher than a threshold value, and initiate random access from RO and PO corresponding to the SSB; specifically, the UE sends a message a (MessageA, msgA) to the gNB, the MsgA including a portion of a Physical RACH (PRACH) and a portion of a Physical uplink shared channel (Physical Uplink Shared Channel, PUSCH), wherein the PRACH (i.e., preamble) is sent in RO and the portion of PUSCH is sent in PO; the threshold value may be a predefined or a gcb broadcast transmission notification;

(3) After receiving the MsgA sent by the UE, the gNB may send a message B (msageb) to the terminal, confirming that the terminal access is successful.

As shown in fig. 1, fig. 1 shows a specific example corresponding to SSB, RO, PO in a 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. Multiple POs corresponding to the same PUSCH configuration may also be considered as one PO group.

In the existing 2-step RACH, the correspondence between the preamble sequence and the PO is predefined. Specifically, every N in one PRACH slot _preamble A preamble sequence corresponds to a PUSCH configured PO and uses a specific DMRS, which can be considered as N _preamble There is a correspondence between the preamble sequence of a specific { time, frequency, (preamble) code } and the POs of a specific { time, frequency, (DMRS) code }. Wherein N is _preamble ＝ceil(T _preamble /T _PUSCH )，T _preamble Representing the product of the number of valid ROs and the number of preambles that each RO can send within one association pattern period, T _PUSCH Representing the product of the number of valid POs and the number of DMRS available in each PO in one association pattern period, ceil (x) represents rounding up x. The association pattern period is accociation pattern period, and typically, the duration of the association pattern period is 160ms. Referring to the lower left corner of fig. 1, PRACH preambles 0-7 may be transmitted in RO0, and each preamble may be mapped to a particular PO in a PUSCH configuration and corresponding to a particular DMRS by a certain rule.

It will be appreciated that repeated transmissions are an effective technical means of coverage enhancement. However, in the prior art, neither PRACH nor PUSCH of MsgA supports repeated transmission. Even if one SSB corresponds to a plurality of ROs, the UE can transmit PRACH of MsgA only in one of the ROs selected; similarly, the UE can only transmit PUSCH of MsgA in one PO corresponding to the PRACH preamble it transmits. In particular, PUSCH tends to have coverage performance inferior to PRACH, and tends to be a coverage bottleneck. In order to solve the problem, in the embodiment of the present application, the network device sends the repetition indication information to the UE, so that the UE repeatedly sends the 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 stage can be enhanced, and further the problem in the prior art that the coverage performance of the uplink channel in the random access stage is poor can be solved. In the repeated transmission process, the relevance between the SSB and the RO and PO is ensured as much as possible, so that the correspondence between uplink and downlink beams and the receiving performance of the base station are ensured. The coverage enhancement transmission method, device, terminal equipment, network equipment and medium provided by the application will be explained and illustrated in detail by specific embodiments.

It should be noted that, in the following description, since the method and the apparatus are based on the same application concept, the principles of the method and the apparatus for solving the problem are similar, so that the implementation of the apparatus and the method may be referred to each other, and the repetition is not repeated.

In addition, it should be noted that the technical solution provided in the embodiments of the present application may be applicable to various systems, especially 5G systems. For example, suitable systems may be global system for mobile communications (global system of mobile communication, GSM), code division multiple access (code division multiple access, CDMA), wideband code division multiple access (Wideband Code Division Multiple Access, WCDMA) universal packet Radio service (general packet Radio service, GPRS), long term evolution (long term evolution, LTE), LTE frequency division duplex (frequency division duplex, FDD), LTE time division duplex (time division duplex, TDD), long term evolution-advanced (long term evolution advanced, LTE-a), universal mobile system (universal mobile telecommunication system, UMTS), worldwide interoperability for microwave access (worldwide interoperability for microwave access, wiMAX), 5G New Radio (NR), and the like. Terminal devices and network devices are included in these various systems. Core network parts such as evolved packet system (Evloved Packet System, EPS), 5G system (5 GS) etc. may also be included in the system.

The terminal device according to the embodiments of the present application may be a device that provides voice and/or data connectivity to a user, a handheld device with a wireless connection function, or other processing device connected to a wireless modem, etc. The names of the terminal devices may also be different in different systems, for example in a 5G system, the terminal devices may be referred to as User Equipment (UE). The wireless terminal device may communicate with one or more Core Networks (CNs) via a radio access Network (Radio Access Network, RAN), which may be mobile terminal devices such as mobile phones (or "cellular" phones) and computers with mobile terminal devices, e.g., portable, pocket, hand-held, computer-built-in or vehicle-mounted mobile devices that exchange voice and/or data with the radio access Network. Such as personal communication services (Personal Communication Service, PCS) phones, cordless phones, session initiation protocol (Session Initiated Protocol, SIP) phones, wireless local loop (Wireless Local Loop, WLL) stations, personal digital assistants (Personal Digital Assistant, PDAs), and the like. The wireless terminal device may also be referred to as a system, subscriber unit (subscriber unit), subscriber station (subscriber station), mobile station (mobile), remote station (remote station), access point (access point), remote terminal device (remote terminal), access terminal device (access terminal), user terminal device (user terminal), user agent (user agent), user equipment (user device), and the embodiments of the present application are not limited. Since the terminal device forms a communication-capable network together with other network devices, such as core network devices, access network devices (i.e. base stations), the terminal device is also regarded as a network device in the present invention.

The network device according to the embodiment of the present application may be a base station, where the base station may include a plurality of cells for providing services for a terminal, and may also be a CU (Central Unit) or a DU (Distributed Unit). Depending on the particular application, the network device may also be referred to as an access point, or may be a device in an access network that communicates over the air-interface, through one or more sectors, with wireless terminal devices, or other names. The network device may be operable to exchange received air frames with internet protocol (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 embodiments of the present application may be a network device (Base Transceiver Station, BTS) in a global system for mobile communications (Global System for Mobile communications, GSM) or code division multiple access (Code Division Multiple Access, CDMA), a network device (NodeB) in a wideband code division multiple access (Wide-band Code Division Multiple Access, WCDMA), an evolved network device (evolutional Node B, eNB or e-NodeB) in a long term evolution (long term evolution, LTE) system, a 5G base station (gNB) in a 5G network architecture (next generation system), a home evolved base station (Home evolved Node B, heNB), a relay node (relay node), a home base station (femto), a pico base station (pico), and the like. In some network structures, the 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, in the embodiments of the present application, the term "and/or" describes an association relationship of association objects, which means that three relationships may exist, for example, a and/or B may be represented: a exists alone, A and B exist together, and B exists alone. The character "/" generally indicates that the context-dependent object is 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 specifically described below.

As shown in fig. 2, a flowchart of steps of a coverage enhancement transmission method applied to a terminal device according to an embodiment of the present application is shown, 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 a message a (i.e., messageA, msgA) sent by the UE to the gNB in the random access phase.

In the step, the UE receives repeated indication information sent by the network equipment; the repetition indication information is used for indicating the terminal equipment UE to repeatedly send a physical uplink shared channel PUSCH corresponding to a first message, where the first message is used for two-step random access.

In this step, it should be noted that, at present, in the random access stage, the coverage performance of the uplink channel is relatively poor, and because whether the random access is successful or not directly affects whether the UE can acquire the network service, it is highly desirable to enhance the coverage performance of the uplink channel in the random access stage.

In this step, it can be understood that the repeated indication information may be explicit indication information, such as: whether to repeat transmission, and/or the number of repetitions, etc., may also be implicit indication information, such as: and implicitly indicating repeated transmission resources 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 the PUSCH corresponding to the first message, and repeatedly send the 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 the PUSCH corresponding to the first message, where the resource includes at least two cases: 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 repetition indication information does not specifically indicate the resource required for repeatedly sending the PUSCH corresponding to the first message, and only the number of repeated sending is given, and at this time, the UE may perform repeated sending of the PUSCH corresponding to the first message according to the resource corresponding to the number of repeated sending, which is preset by the protocol.

According to the coverage enhancement transmission method, the repeated indication information sent by the network equipment is received, so that the terminal equipment UE can repeatedly send the PUSCH corresponding to the first message for the two-step random access, 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 in the prior art is poor can be solved.

Based on the content of the above embodiment, in this embodiment, the repetition instruction information includes:

whether to repeat transmission and/or the number of repeated transmission.

In this embodiment, an implementation manner of the repetition indication information is given, that is, the repetition indication information may include whether repeated transmission is performed, and/or the number of repeated transmissions. Namely, the following cases can be included:

first case: the repeated indication information only comprises whether repeated transmission is carried out or not, and the repeated transmission times are not given, and if the repeated transmission is not carried out, the repeated transmission times can be not considered; at this time, if the repetition transmission is performed, the repetition transmission of the PUSCH corresponding to the first message may be performed according to a predetermined repetition number or a randomly determined repetition number, for example, the repetition number 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, etc. of the total number.

Second case: the repetition instruction information only includes the repetition transmission times, for example, 3 times, and the repetition transmission of the PUSCH corresponding to the first message may be performed according to the repetition transmission times.

Third case: the repetition instruction information includes both whether to perform repeated transmission and the repetition transmission times, and if the repetition transmission is performed and the repetition transmission times are 2, the repetition transmission of the PUSCH corresponding to the first message is performed according to the repetition transmission times.

In this embodiment, it can be seen that the repetition indication information gives explicit indication information, that is, explicitly gives whether to perform repeated transmission and/or the number of repeated transmission, 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 repeated transmission.

Based on the foregoing embodiment, in this embodiment, determining, according to the repetition indication information, a resource for repeatedly transmitting the PUSCH corresponding to the first message, and repeatedly transmitting, in the resource, the PUSCH corresponding to the first message 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 sending the PUSCH corresponding to the first message, and specifically, determining resources for repeatedly sending the PUSCH corresponding to the first message may include one or more of the following manners:

the PUSCH performs repeated transmission only in a PO group corresponding to one PUSCH configuration (abbreviated as repetition in the PO group);

the PUSCH performs repeated transmission in PO groups corresponding to the plurality of PUSCH configurations (the repetition between PO groups for short);

repeat transmissions combining intra-and inter-PO group repetition.

In this embodiment, it can be seen that this embodiment provides a manner of determining the resources for repeatedly transmitting the PUSCH corresponding to the first message, where the manners include repeated transmission in the PO group, repeated transmission between the PO groups, and repeated transmission combining the repeated transmission in the PO group and the repeated transmission between the PO groups.

In this embodiment, it should be noted that, when the PUSCH is repeatedly sent only in the physical uplink shared channel timing PO group (multiple POs) corresponding to one PUSCH configuration, the following implementation manner may be specifically adopted:

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

or alternatively, the first and second heat exchangers may be,

repeating the mapping process from partial PRACH leading sequence to PO K times after the partial PRACH leading sequence in PRACH time slot of the physical random access channel is mapped to PO until all PRACH leading sequences are mapped to PO group;

or alternatively, the first and second heat exchangers may be,

pre-indicating the PUSCH to configure the repeated transmission resources of each PO in the corresponding physical uplink shared channel opportunity PO group; wherein the repetition times of each PO are the same or different.

It may be understood that in this embodiment, the gNB may instruct the UE to transmit PUSCH of MsgA in multiple POs, and the repetition times of the multiple POs may be the same or different; after the UE transmits PUSCH of MsgA in multiple POs, the gNB may perform joint detection or joint demodulation on PUSCH of MsgA from the same UE in multiple POs, thereby improving detection or demodulation performance and implementing coverage enhancement.

It can be understood that, since the present embodiment adopts a different PO resource indication manner from the prior art, PUSCH configuration indication information is difficult to multiplex, and thus, the present embodiment is suitable for the case of covering and enhancing PUSCH resource independent configuration used by MsgA and the existing MsgA.

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

In this embodiment, it should be noted that three ways of repeated transmission between different PO groups are provided, where (1) PUSCH repeated transmission is performed only between 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; (2) repeatedly sending the 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; (3) and repeatedly sending the PUSCH among a plurality of PUSCH configurations corresponding to the RO of the SSB with the same or different indexes, wherein the demodulation reference signals (DMRS) used by the PO in the PUSCH configurations corresponding to the different RO are different.

In this embodiment, it should be noted that, when it is determined that, when repeated PUSCH transmission is performed only between a plurality of PUSCH configurations corresponding to random access channel occasions RO corresponding to synchronization signal blocks SSB of the same index in one association period, if the total number of PRACH slots corresponding to ROs corresponding to one SSB is N, UE transmitting PRACH in the nth RO may only repeatedly transmit PUSCH in the PO group corresponding to the nth RO and in the subsequent N-N PO groups at most; wherein, the number of times of PUSCH repeated transmission is 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 appreciated that, for this case, coverage enhancement is achieved by letting the UE repeatedly transmit PUSCH corresponding to MsgA on resources between a plurality of PO groups corresponding to a plurality of ROs corresponding to the same SSB within one association period. In addition, the method provided by the embodiment does not cause overlap between the POs corresponding to SSB with different indexes, so that the beam relevance between uplink and downlink is ensured, and the transmission performance is ensured. The method of this embodiment is applicable to the case where ROs corresponding to one SSB within one association period are distributed in at least 2 PRACH slots. It can be appreciated that for this case, the method of PUSCH configuration indication PO resources is the same as the prior art, so the PUSCH resources used by the coverage enhancement MsgA and the existing MsgA may be configured either independently or in a shared manner.

In this embodiment, it should be noted that, when it is determined that PUSCH is repeatedly transmitted between PUSCH configurations corresponding to ROs of SSBs corresponding to the same index in multiple association periods, if the association cycle number in one association pattern period is M, the UE that transmits PRACH at the RO in the mth association period may only repeatedly transmit PUSCH in the PO group corresponding to the RO in the mth association period and in the RO group of the subsequent M-M association periods at most; wherein, the number of times of PUSCH repeated transmission is 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 appreciated that, for this case, coverage enhancement is achieved by letting the UE repeatedly transmit PUSCH corresponding to MsgA on resources between a plurality of association periods and between a plurality of PO groups corresponding to a plurality of ROs corresponding to the same SSB. In the method, the interval of the repeated transmission of the PUSCH is longer, so that better time domain diversity gain can be obtained, but the adjacent PUSCH is correspondingly harder to carry out joint channel estimation so as to improve the channel estimation precision. In addition, the method provided by the embodiment does not cause overlap between the POs corresponding to SSB with different indexes, so that the beam relevance between uplink and downlink is ensured, and the transmission performance is ensured. The method of the embodiment is applicable to the situation that a plurality of association periods exist in one association pattern period. It can be appreciated that for this case, the method of PUSCH configuration indication PO resources is the same as the prior art, so the PUSCH resources used by the coverage enhancement MsgA and the existing MsgA may be configured either independently or in a shared manner.

In this embodiment, when it is determined that PUSCH is repeatedly transmitted between PUSCH configurations corresponding to ROs of SSBs with the same or different indexes, the DMRS when the UE transmits 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 letting the UE repeatedly transmit PUSCH corresponding to MsgA between multiple PUSCH configurations corresponding to ROs corresponding to SSBs of the same or different indexes. The application range of the embodiment is wider, and the application range is hardly limited by the corresponding number of SSB, RO, PO groups, so that the resource capable of repeatedly transmitting is enlarged; but also results in overlap between the POs of SSBs of different indices. In order to make the gNB distinguish the SSBs selected by the UE, a certain limitation may be applied to the DMRS, so that even if UEs selecting different SSBs access transmit PUSCH in the same PO group due to repeated transmission, different DMRS may be used, so that the gNB may distinguish. It can be appreciated that for this case, the method of PUSCH configuration indication PO resource is the same as the prior art, but the correspondence between SSB-RO-PO is changed, so it is applicable to the case where coverage enhancement MsgA is configured independently of PUSCH resources used by the existing MsgA.

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

Based on the content of the above embodiment, in this embodiment, the repetition instruction information includes: multiplexing indication information, where the multiplexing indication information is used to indicate repeated transmission resources of the PUSCH based on a PUSCH resource allocation mode.

In this embodiment, unlike the above-described explicit repetition instruction information including whether or not repetition transmission and/or the number of repetition transmissions is performed, the repetition instruction information in this embodiment belongs to implicit repetition instruction information, that is, the repetition instruction information in this embodiment does not explicitly indicate whether or not repetition transmission and/or the number of repetition transmissions is performed, but implicitly indicates the repetition transmission resource of PUSCH based on the resource allocation scheme of PUSCH.

For example, in the present embodiment, the repetition indication information may be multiplexing indication information, where the multiplexing indication information is used to indicate the number of PRACH preambles mapped to the "frequency domain, DMRS, time domain" resources in the same PO, and further according to the indicated number of PRACH preambles 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 transmission times and repeated transmission resources of the PUSCH;wherein N is _preamble Indicating the number of PRACH preambles mapped into the same PO; t (T) _preamble Representing the product of the number of valid ROs and the number of preambles that each RO can send within one association pattern period, T _PUSCH Representing the product of the effective number of POs and the number of DMRS available in each PO in one association pattern period; ceil represents a rounding function.

Based on the foregoing embodiments, in this embodiment, the multiplexing indication information is used to indicate the number of preamble sequences of the physical random access channel PRACH mapped to the same physical uplink shared channel opportunity PO based on the resource allocation manner of the PUSCH; the preamble sequence number of the physical random access channel PRACH mapped to the same physical uplink shared channel opportunity PO is used to determine the repeated transmission resource of the PUSCH.

In this embodiment, the multiplexing indication information is used to indicate the number of preamble sequences of the physical random access channel PRACH mapped to the same physical uplink shared channel opportunity PO based on the PUSCH resource allocation manner, so that the number of preamble sequences of the physical random access channel PRACH mapped to the same physical uplink shared channel opportunity PO is determined according to the default formula N _preamble ＝ceil(T _preamble /T _PUSCH ) The calculated ratio of the PRACH preamble sequence numbers can determine the repeated transmission times and repeated transmission resources of the PUSCH.

For example, in the present embodiment, it is assumed that the multiplexing indication information indicates that the number of preambles of the physical random access channel PRACH mapped to the same physical uplink shared channel occasion PO is 4, and according to the default formula N _preamble ＝ceil(T _preamble /T _PUSCH ) The PRACH preamble sequence number obtained by calculation is 2, according to N _preamble ＝ceil(K*T _preamble /T _PUSCH ) As can be seen, k= 2,K indicates a multiple of the indication of the multiplexing indication information, that is, indicates that the number of PRACH preambles multiplexed to the "frequency domain, DMRS, time domain" of the same PO is 2 times that without repetition.

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

step 201: sending repeated indication information to terminal equipment (UE); the repetition 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 repeated indication information to the terminal device UE; the repetition 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 coverage enhancement transmission method, the repeated indication information is sent to the terminal equipment UE, so that the terminal equipment UE can repeatedly send the physical uplink shared channel PUSCH corresponding to the first message for the two-step random access, 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 in the prior art is poor can be solved.

whether to repeat transmission and/or the number of repeated transmission.

Based on the foregoing embodiments, 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.

In this embodiment, the repetition indication information is further used to indicate resources for 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 for repeatedly sending the PUSCH corresponding to the first message, and repeatedly send, in the resources, the PUSCH corresponding to the first message. Specifically, after receiving the repetition indication information sent by the network device, the UE repeatedly sends the PUSCH corresponding to the first message according to the resource specifically indicated in the repetition indication information, because the resource specifically indicated in the repetition indication information is needed to repeatedly send the PUSCH corresponding to the first message. In addition, in the actual processing, there is 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 repeated transmissions is given, and in this case, the UE may perform repeated transmission of the PUSCH corresponding to the first message according to the resource corresponding to the number of repeated transmissions, which is predetermined by the protocol.

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

repeat transmissions combining intra-and inter-PO group repetition.

or alternatively, the first and second heat exchangers may be,

Based on the foregoing embodiments, in this embodiment, the repeated PUSCH transmission in the plurality of POs corresponding to the plurality of PUSCH configurations includes any one of the following modes:

In this embodiment, when it is determined that PUSCH is repeatedly transmitted between PUSCH configurations corresponding to ROs of SSBs with the same or different indexes, the DMRS when the UE transmits 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 letting the UE repeatedly transmit PUSCH corresponding to MsgA between multiple PUSCH configurations corresponding to ROs corresponding to SSBs of the same or different indexes. The application range of the embodiment is wider, and the application range is hardly limited by the corresponding number of SSB, RO, PO groups, so that the resource capable of repeatedly transmitting is enlarged; but also causes overlap between the POs of SSBs of different indices; however, in order to make the gNB distinguish the SSBs selected by the UE, a certain limitation may be applied to the DMRS, so that even if the UE selecting different SSB accesses sends PUSCH in the same PO group due to repeated transmission, different DMRS may be used, so that the gNB may distinguish. It can be appreciated that for this case, the method of PUSCH configuration indication PO resource is the same as the prior art, but the correspondence between SSB-RO-PO is changed, so it is applicable to the case where coverage enhancement MsgA is configured independently of PUSCH resources used by the existing MsgA.

For example, in the present embodiment, the repetition indication information may be multiplexing indication information for indicating mappingThe PRACH preamble sequence number of the frequency domain, the DMRS and the time domain resources in the same PO, and then according to the indicated PRACH preamble sequence number and a default formula N _preamble ＝ceil(T _preamble /T _PUSCH ) The calculated ratio of the PRACH preamble sequence numbers can determine the repeated transmission times and repeated transmission resources of the PUSCH.

Based on the foregoing embodiment, in this embodiment, the coverage-enhanced transmission method further includes:

In this embodiment, after the network device sends the repetition indication information to the UE, the UE may perform repeated transmission of the PUSCH corresponding to the first message in the resource indicated by the network device, and the network device may receive the PUSCH repeatedly sent by the UE in the indicated resource, thereby enhancing coverage performance of the uplink channel in the random access stage.

It should be noted that, the embodiments of the present application are mainly applied to a 5G NR system, including a network device (such as a base station, gNB) and a terminal device (UE); in addition, the present application may also be applied to other systems, as long as the terminal device needs to initiate random access to the network device. 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, applying for a wireless network connection service; the gNB receives the random access request from the at least one UE and wirelessly services it. And the gNB and the UE1 and the UE2 conduct data interaction and transmission through wireless communication.

The present application is specifically illustrated by the following examples.

First embodiment:

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

step 1: the gNB sends MsgA repeated indication information;

step 2: the gNB sends MsgA repeated indication information;

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

Step 4: the gNB receives the UE (repeated) transmitted MsgA on the corresponding resources on which the UE transmitted the MsgA.

For step 1 and step 2, the MsgA repetition indication information sent by the gnb may be broadcast, for example, the information is carried in a system information block 1 (System Information Block, SIB 1) and is broadcast, and a plurality of UEs may receive the information; the indication information may also be sent unicast, e.g. by higher layer signaling, such as radio resource control (Radio Resource Control, RRC) signaling, to the UE. Furthermore, the MsgA repetition indication information may be sub-information of MsgA configuration information, or may be information independent of MsgA configuration information, where the MsgA configuration information is sent by the gNB to the UE in the prior art. Correspondingly, the UE receives the MsgA repeated indication information sent by the gNB.

It should be noted that, for step 3, determining PUSCH resources of the MsgA according to the MsgA repetition indication information includes two cases of display indication and implicit indication.

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

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

if only the repetition number of PUSCH is indicated, a specific repetition number may be indicated, for example, one of "1,2,4", where "1" is indicated, that is, no retransmission is performed;

if whether the MsgA is repeated or not and the number of times of PUSCH repetition are indicated, the combination of the two may be adopted;

as shown in fig. 5 and 6, after determining the repetition number, the UE also needs to determine the final transmission resource according to "PO resource for single transmission (when not repeated)". It should be noted that the PO resource of a single transmission (when not repeated) may be determined according to MsgA configuration information in the prior art.

For the manner of fig. 5, after all the preambles in one PRACH slot complete a round of mapping from all the "PRACH preambles" to the "frequency domain of PO, DMRS, time domain", the mapping of the next round is continued until K times (taking 2 times as an example in fig. 5) are repeated, where K is the number of repetitions determined according to the MsgA repetition indication information.

For the manner of fig. 6, after the PRACH preamble sequence in one PRACH slot completes the mapping to the frequency domain of PO and the DMRS, K repetitions in the time domain (2 times are taken as an example in fig. 6) are preferentially performed, and mapping of the PO time domain is performed, including mapping into the PO of one PUSCH slot, and further mapping into a plurality of PUSCH slots.

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

A. regarding the PO with the same frequency position as a subgroup;

B. in each subgroup, the repetition number of the ith PO in each subgroup PO is the same as Ki, so that the repetition indication information indicates the time domain resource of each PO, for example, the repetition number of the ith PO in each PO group is { K1, K2 … Ki … }; as another example, the repetition number of the ith PO in each of the POs subgroups may be different, and the repetition indication information needs to indicate the repetition number for each PO of each PO subgroup, for example, the repetition number { K11, K12, … K1i …, kj1, kj2, … Kji … } to indicate that the repetition number of the ith PO as the jth subgroup is Kji, as shown in fig. 7.

C. In each subgroup, the time-domain start position of the next PO needs to be determined according to the end position of the previous PO, for example, the start position of the next PO is the last repeated end position of the previous PO plus a predefined time-domain interval.

The above description is a description of the case of displaying instructions, and the case of implicit instructions will be described below. Specifically, in the implicit indication method, similar to the methods shown in fig. 5 and 6 of the above explicit indication method, the UE still needs to determine the PO resource of a single transmission (when not repeating) and the number of repetitions, and determine the PUSCH transmission resource of the MsgA. For example, the repetition indication information may be multiplexing indication information for indicating the number of PRACH preambles mapped to the "frequency domain, DMRS, time domain" resources in the same PO. For example, existing techniquesIn operation, the PRACH preamble sequence number of the resources of the frequency domain, the DMRS and the time domain mapped to the same PO is shown as 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=2, indicating that the number of PRACH preambles multiplexed into the "frequency domain, DMRS, time domain" of the same PO is 2 times that without repetition; the mapping is then performed in accordance with the methods of fig. 5 and 6.

For step 4, the gnb may detect PUSCH from MsgA repeatedly transmitted by the same UE in multiple POs. PUSCH resources of MsgA that one UE can repeatedly transmit are 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 PUSCH of MsgA in multiple POs, and the repetition times of the multiple POs may be the same or different; after the UE transmits PUSCH of MsgA in multiple POs, the gNB may perform joint detection or joint demodulation on PUSCH of MsgA from the same UE in multiple POs, thereby improving detection or demodulation performance and implementing coverage enhancement.

In this embodiment, since the PO resource indication scheme different from the prior art is adopted, PUSCH configuration indication information is difficult to multiplex, and thus the method is suitable for covering the case where MsgA is configured independently of PUSCH resources used by the prior art MsgA.

Second embodiment:

in this embodiment, the MsgA may perform repeated transmission in the POs corresponding to the PUSCH configurations, and perform repeated transmission only between the PUSCH configurations corresponding to the ROs of the SSB corresponding to the same index in one association period. The difference between step 1, step 2 and step 4 can be mainly described in step 3 with reference to the method in the first embodiment, and the present embodiment focuses on step 3.

The association cycle is association period, which represents the length of time it takes for a group of SSBs to complete "all SSBs with different indices are mapped into ROs at least once" once (see fig. 1). In this embodiment, the UE may repeat transmission between a plurality of PUSCH configurations corresponding to ROs of SSBs corresponding to the same index in one association period (each PUSCH configuration corresponds to a group of POs), as shown in fig. 8:

as shown in fig. 8, SSB0 corresponds to at least 2 ROs, and the 2 ROs (RO 0 and RO1, respectively) are in different PRACH slots, each of which corresponds to one PUSCH configuration (PO group). At this time, for a UE selecting the PRACH for transmitting MsgA by RO0 corresponding to SSB0, PUSCH for MsgA may be transmitted in the PO group corresponding to RO0 and the PO group corresponding to RO1, for example, the UE may repeatedly transmit 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 ROs corresponding to one SSB is N, the UE transmitting PRACH in the nth RO may only repeatedly transmit PUSCH in the PO group corresponding to the nth RO and the subsequent N-N PO groups at most. In this case, the repetition indication information may indicate only whether or not to repeat, and the number of repetitions may be a predefined number not greater than N-n+1, for example, directly defined as the number of MsgA PUSCH repetitions transmitted in the nth PO group being N-n+1; a specific repetition number K may be indicated, but the number of PUSCH actual repetition transmissions is not greater than N-n+1, that is, the actual repetition number 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 achieved by letting the UE repeatedly send PUSCH corresponding to MsgA on resources between a plurality of PO groups corresponding to a plurality of ROs of the same SSB in one association period. The method of this embodiment is applicable to the case where ROs corresponding to one SSB within one association period are distributed in at least 2 PRACH slots.

It should be noted that, in this embodiment, the method for indicating the PO resource by PUSCH configuration is the same as that in the prior art, so the PUSCH resources used by the coverage enhancement MsgA and the existing MsgA may be configured independently or may be shared.

Third embodiment:

in this embodiment, the MsgA may perform repeated transmission in the POs corresponding to the PUSCH configurations, and perform repeated transmission between the PUSCH configurations (PO groups) corresponding to the ROs of the SSB corresponding to the same index in the association periods. The difference between step 1, step 2 and step 4 can be mainly described in step 3 with reference to the method in the first embodiment, and the present embodiment focuses on step 3.

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

In this embodiment, if the association cycle number in one association pattern period is M, the UE that transmits the PRACH by the RO in the mth association period may only repeatedly transmit the PUSCH in the PO group corresponding to the RO in the mth association period and the RO group in the subsequent M-M association periods at most. In this case, the repetition indication information may indicate only whether or not to repeat, and the number of repetitions may be a predefined number not greater than M-m+1, for example, directly defined as the number of repetitions of the MsgA PUSCH starting transmission in the mth association period being M-m+1; a specific repetition number K may be indicated, but the number of PUSCH actual repetition transmissions is not greater than M-m+1, that is, the actual repetition number 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 letting the UE repeatedly transmit PUSCH corresponding to MsgA on resources between multiple association periods and between multiple PO groups corresponding to multiple ROs of the same SSB. In the method, the interval of the repeated transmission of the PUSCH is longer, so that better time domain diversity gain can be obtained, but the adjacent PUSCH is correspondingly harder to carry out joint channel estimation so as to improve the channel estimation precision. In addition, the method provided by the embodiment does not cause overlap between the POs corresponding to SSB with different indexes, so that the beam relevance between uplink and downlink is ensured, and the transmission performance is ensured. The method of the embodiment is applicable to the situation that a plurality of association periods exist in one association pattern period.

In this embodiment, the method for indicating the PO resource by PUSCH configuration is the same as that in the prior art, so the PUSCH resource used by the coverage enhancement MsgA and the existing MsgA may be configured independently or may be shared.

Fourth embodiment:

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

As shown in fig. 10, one SSB corresponds to 4 ROs, and the PUSCH repetition number of MsgA is 2. The PUSCH of the 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 one UE selects SSB0 and transmits PRACH pilot of MsgA in RO3 corresponding to SSB0, the UE may repeatedly transmit PUSCH of MsgA in a PO group corresponding to RO3 corresponding to SSB0 and a PO group corresponding to RO4 corresponding to SSB 1.

In this embodiment, in one association pattern period, if the UE transmits the PRACH pilot of MsgA in the ith RO for all ROs corresponding to SSB, the PUSCH of MsgA may be repeatedly transmitted in the PO group corresponding to the ith, the (i+1) th, and the (… …) th (i+k-1) th RO. Further, in order for the gNB to clearly distinguish which SSB is selected by the UE initiating the 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 the 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 not only can be used for one association period, but also can be extended between different association periods of one association pattern period, and the method and principle are similar and will not be repeated.

In this embodiment, coverage enhancement is achieved by letting the UE repeatedly transmit PUSCH corresponding to MsgA between multiple PUSCH configurations corresponding to ROs corresponding to SSBs of the same or different indexes. The application range of the embodiment is wider, and the application range is hardly limited by the corresponding number of SSB, RO, PO groups, so that the resource capable of repeatedly transmitting is enlarged; but also causes overlap between the POs of SSBs of different indices; however, in order to make the gNB distinguish the SSBs selected by the UE, a certain limitation may be applied to the DMRS, so that even if the UE selecting different SSB accesses sends PUSCH in the same PO group due to repeated transmission, different DMRS may be used, so that the gNB may distinguish.

It should be noted that, in this embodiment, the method for configuring the PUSCH to indicate the PO resource is the same as the prior art, but the correspondence between SSB-RO-PO is changed, so the method is applicable to the case that the coverage enhancement MsgA is configured independently from the PUSCH resource used by the existing MsgA.

Fifth embodiment:

In the above embodiments, the first embodiment is PUSCH retransmission in a PO group, and the second, third, and fourth embodiments are PUSCH retransmission between PO groups. In practice, PUSCH retransmission of MsgA may be extended to "retransmission within and between PO groups at the same time", i.e. the first embodiment may be combined with the second embodiment, the first embodiment with the third embodiment, or the first embodiment with the fourth embodiment. In this case, the repetition indication information may indicate the number of repeated transmissions within the PO group and between the PO groups, respectively; only one unified repetition number K may be indicated, and the UE may perform K repeated transmissions of PUSCH of MsgA at most between transmissible PUSCH resources composed of all PO groups and between PO groups.

Therefore, the method in the embodiment further expands the resources of the repeated PUSCH transmission of the UE, and improves the coverage performance.

In the prior art, retransmission of PUSCH does not support MsgA. The method for repeatedly sending the PUSCH of the MsgA enables the terminal equipment to know the resources of the PUSCH for repeatedly sending the MsgA before accessing the network equipment, so that the coverage of the PUSCH for sending the MsgA by the terminal can be improved.

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

a receiving module 11, configured to receive repeated 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;

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

It should be noted that, the present apparatus can implement all the method steps of the coverage enhancement transmission method embodiment applied to the terminal device and achieve the same technical effects, and will not be described herein.

In addition, as shown in fig. 12, a block diagram of a coverage-enhanced transmission apparatus applied to a network device in an embodiment of the present application includes:

a sending module 21, configured to send repeated indication information to a terminal device UE; the repetition 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 present apparatus can implement all the method steps of the coverage enhancement transmission method embodiment applied to the network device and achieve the same technical effects, and will not be described herein.

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

Where in FIG. 13, a bus architecture may comprise any number of interconnected buses and bridges, with various circuits of the one or more processors, specifically represented by processor 1310, and the memory, represented by memory 1320, being linked together. The bus architecture may also link together various other circuits such as peripheral devices, voltage regulators, power management circuits, etc., which are well known in the art and, therefore, will not be described further herein. The bus interface provides an interface. Transceiver 1300 may be a number of elements, including a transmitter and a receiver, providing a means for communicating with various other apparatus over a transmission medium, including wireless channels, wired channels, optical cables, etc. 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 (Application Specific Integrated Circuit, ASIC), a Field programmable gate array (Field-Programmable Gate Array, FPGA), or a complex programmable logic device (Complex Programmable Logic Device, CPLD), or the processor may employ a multi-core architecture.

A memory 1320 for storing a computer program; a transceiver 1300 for receiving and transmitting 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 above embodiment, in this embodiment, the repetition instruction information includes: whether to repeat 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 achieve the same technical effects, and will not be described herein again.

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

Where in FIG. 14, a bus architecture may comprise any number of interconnected buses and bridges, and in particular one or more processors represented by the processor 1410 and various circuits of the memory represented by the memory 1420, are linked together. The bus architecture may also link together various other circuits such as peripheral devices, voltage regulators, power management circuits, etc., which are well known in the art and, therefore, will not be described further herein. The bus interface provides an interface. Transceiver 1400 may be a number of elements, including a transmitter and a receiver, providing a means for communicating with various other apparatus over a transmission medium, including wireless channels, wired channels, optical cables, etc. 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 (Application Specific Integrated Circuit, ASIC), a Field programmable gate array (Field-Programmable Gate Array, FPGA), or a complex programmable logic device (Complex Programmable Logic Device, CPLD), and the processor may also employ a multi-core architecture.

A memory 1420 for storing a computer program; a transceiver 1400 for receiving and transmitting data under the control of the processor; a processor 1410 for reading the computer program in the memory and performing the following operations:

Based on the content of the above embodiment, in this embodiment, optionally, the repetition instruction information includes:

whether to repeat transmission and/or the number of repeated transmission.

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

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

Based on the foregoing embodiments, in this embodiment, optionally, the repeated PUSCH transmission is performed in a plurality of POs corresponding to a plurality of PUSCH configurations, including any one of the following manners:

Based on the content of the above embodiment, in this embodiment, optionally, the repetition instruction information includes: multiplexing indication information, where the multiplexing indication information is used to indicate repeated transmission resources of the PUSCH based on a PUSCH resource allocation mode.

Based on the foregoing embodiments, in this embodiment, optionally, the multiplexing indication information is configured to indicate, based on a PUSCH resource allocation manner, a preamble number of a physical random access channel PRACH mapped to the same physical uplink shared channel occasion PO; the preamble sequence number of the physical random access channel PRACH mapped to the same physical uplink shared channel opportunity PO is used to determine the repeated transmission resource of the PUSCH.

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

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 achieve the same technical effects, and will not be described herein.

It should be noted that, in the embodiment of the present application, the division of the units is schematic, which is merely a logic function division, and other division manners may be implemented in actual practice. In addition, each functional unit in each embodiment of the present application may be integrated in one processing unit, or each unit may exist alone physically, or two or more units may be integrated in one unit. The integrated units may be implemented in hardware or in software functional units.

The integrated units, if implemented in the form of software functional units and sold or used as stand-alone products, may be stored in a processor-readable storage medium. Based on such understanding, the technical solution of the present application may be embodied in essence or a part contributing to the prior art or all or part of the technical solution, in the form of a software product stored in a storage medium, including several instructions to cause a computer device (which may be a personal computer, a server, or a network device, etc.) or a processor (processor) to perform all or part of the steps of the methods described in the embodiments of the present application. And the aforementioned storage medium includes: a U-disk, a removable hard disk, a Read-Only Memory (ROM), a random access Memory (Random Access Memory, RAM), a magnetic disk, or an optical disk, or other various media capable of storing program codes.

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

In another aspect, embodiments of the present application further provide a processor-readable storage medium storing a computer program for causing the processor to perform the method described in the above embodiments.

The processor-readable storage medium may be any available medium or data storage device that can be accessed by a processor, including, but not limited to, magnetic storage (e.g., floppy disks, hard disks, magnetic tape, magneto-optical disks (MOs), etc.), optical storage (e.g., CD, DVD, BD, HVD, etc.), semiconductor storage (e.g., ROM, EPROM, EEPROM, nonvolatile storage (NAND FLASH), solid State Disk (SSD)), and the like.

As can be seen from the above embodiments, a processor readable storage medium stores a computer program for causing the processor to perform the steps of the coverage enhancement transmission method described above, 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 perform:

It will be appreciated by those skilled in the art that 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, magnetic 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 flowchart illustrations and/or block diagrams, and combinations of flows and/or blocks in the flowchart illustrations 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 modifications and variations can be made in the present application without departing from the spirit or scope of the application. Thus, if such modifications and variations of the present application fall within the scope of the claims and the equivalents thereof, the present application is intended to cover such modifications and variations.

Claims

1. A coverage enhanced transmission method, comprising:

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 determining, according to the repetition indication information, a resource for repeatedly sending the PUSCH corresponding to the first message, and repeatedly sending the PUSCH corresponding to the first message in the resource includes:

determining to perform repeated transmission of the PUSCH in a plurality of POs corresponding to the plurality of PUSCH configurations according to the repeated instruction information;

the determining that PUSCH repetition transmission is performed in a plurality of POs corresponding to the plurality of PUSCH configurations includes any one of the following modes:

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

whether to repeat transmission and/or the number of repeated transmission.

3. The coverage enhanced transmission method of claim 1, wherein the repetition indication information comprises: multiplexing indication information, where the multiplexing indication information is used to indicate repeated transmission resources of the PUSCH based on a PUSCH resource allocation mode.

4. The transmission method of coverage enhancement according to claim 3, wherein the multiplexing indication information is used for indicating the number of preamble sequences of the physical random access channel PRACH mapped to the same physical uplink shared channel occasion PO based on a resource allocation manner of PUSCH; the preamble sequence number of the physical random access channel PRACH mapped to the same physical uplink shared channel opportunity PO is used to determine the repeated transmission resource of the PUSCH.

5. A coverage enhanced transmission method, comprising:

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;

the repetition indication information is further used for indicating resources of the PUSCH corresponding to the first message to be repeatedly sent by the UE;

the resources required for repeatedly sending the PUSCH corresponding to the first message include:

repeatedly sending the PUSCH in a plurality of POs corresponding to the plurality of PUSCH configurations;

the repeated PUSCH transmission in the plurality of POs corresponding to the plurality of PUSCH configurations includes any one of the following modes:

6. The coverage enhanced transmission method of claim 5, wherein the repetition indication information comprises:

whether to repeat transmission and/or the number of repeated transmission.

7. The coverage enhanced transmission method of claim 5, wherein the repetition indication information comprises: multiplexing indication information, where the multiplexing indication information is used to indicate repeated transmission resources of the PUSCH based on a PUSCH resource allocation mode.

8. The method for transmitting coverage enhancement according to claim 7, wherein the multiplexing indication information is used for indicating the number of preamble sequences of the physical random access channel PRACH mapped to the same physical uplink shared channel occasion PO based on a resource allocation manner of PUSCH; the preamble sequence number of the physical random access channel PRACH mapped to the same physical uplink shared channel opportunity PO is used to determine the repeated transmission resource of the PUSCH.

9. The coverage enhanced transmission method of claim 7, further comprising:

10. A coverage enhanced transmission device, comprising:

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 sending, in the resource, the PUSCH corresponding to the first message;

11. A coverage enhanced transmission device, comprising:

a sending module, configured to send repeated 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;

12. A terminal device comprising a memory, a processor and a computer program stored on the memory and executable on the processor, characterized in that the processor implements the following steps when executing the computer program:

13. The terminal device according to claim 12, wherein the repetition indication information comprises: whether to repeat transmission and/or the number of repeated transmission.

14. The terminal device according to claim 12, wherein the repetition indication information comprises: multiplexing indication information, where the multiplexing indication information is used to indicate repeated transmission resources of the PUSCH based on a PUSCH resource allocation mode.

15. The terminal device according to claim 14, wherein the multiplexing indication information is configured to indicate a preamble number of a physical random access channel PRACH mapped to the same physical uplink shared channel opportunity PO based on a resource allocation manner of PUSCH; the preamble sequence number of the physical random access channel PRACH mapped to the same physical uplink shared channel opportunity PO is used to determine the repeated transmission resource of the PUSCH.

16. A network device comprising a memory, a processor and a computer program stored on the memory and executable on the processor, wherein the computer program when executed by the processor performs the steps of:

17. The network device of claim 16, wherein the repetition indication information comprises:

whether to repeat transmission and/or the number of repeated transmission.

18. The network device of claim 16, wherein the repetition indication information comprises: multiplexing indication information, where the multiplexing indication information is used to indicate repeated transmission resources of the PUSCH based on a PUSCH resource allocation mode.

19. The network device according to claim 18, wherein the multiplexing indication information is configured to indicate a preamble number of a physical random access channel PRACH mapped to the same physical uplink shared channel occasion PO based on a resource allocation manner of PUSCH; the preamble sequence number of the physical random access channel PRACH mapped to the same physical uplink shared channel opportunity PO is used to determine the repeated transmission resource of the PUSCH.

20. The network device of claim 17, wherein the processor, when executing the computer program, is further configured to implement the steps of:

21. A non-transitory computer readable storage medium having stored thereon a computer program, characterized in that the program when executed by a processor implements the steps of the coverage enhanced transmission method according to any of claims 1 to 4 or performs the steps of the coverage enhanced transmission method according to any of claims 5 to 9.