CN114271015B

CN114271015B - Information indication method and device, terminal equipment and network equipment

Info

Publication number: CN114271015B
Application number: CN201980099431.9A
Authority: CN
Inventors: 石聪; 林雪
Original assignee: Guangdong Oppo Mobile Telecommunications Corp Ltd
Current assignee: Guangdong Oppo Mobile Telecommunications Corp Ltd
Priority date: 2019-10-24
Filing date: 2019-10-24
Publication date: 2023-11-10
Anticipated expiration: 2039-10-24
Also published as: WO2021077377A1; CN114271015A

Abstract

The embodiment of the application provides an information indication method and device, terminal equipment and network equipment, wherein the method comprises the following steps: the method comprises the steps that terminal equipment receives a first message, wherein the first message comprises a media access control protocol data unit (MAC PDU), and the MAC PDU carries first indication information and/or second indication information; the first indication information is used for determining whether the MAC PDU contains a first type of MAC sub-PDU or not, and the second indication information is used for determining the number of the first type of MAC sub-PDU contained in the MAC PDU; the first type of MAC subPDU is a MAC subPDU containing an RRC message.

Description

Information indication method and device, terminal equipment and network equipment

Technical Field

The embodiment of the application relates to the technical field of mobile communication, in particular to an information indication method and device, terminal equipment and network equipment.

Background

In a long term evolution (Long Term Evolution, LTE) system, a four-step random access procedure is used for the random access procedure. The four-step random access procedure in the LTE system is still in use in the New Radio (NR) system. Along with the discussion of standardization, the four-step random access process is considered to be more complicated, and larger time delay is brought to the access of the terminal, so that the two-step random access process is proposed. Msg1 and msg3 in the four-step random access procedure are transmitted through msgA in the two-step random access procedure, and msg2 and msg4 in the four-step random access procedure are transmitted through msgB in the two-step random access procedure.

In a four-step random access procedure, the msgB may include one or more media access control (Media Access Control, MAC) sub-protocol data units (sub Protocol Data Unit, subPDU) including radio resource control (Radio Resource Control, RRC) messages, however, the terminal device does not know whether the MAC PDU of the msgB includes an RRC message or not, and does not know that the MAC PDU includes several RRC messages when decoding the MAC PDU of the msgB.

Disclosure of Invention

The embodiment of the application provides an information indication method and device, terminal equipment and network equipment.

The information indication method provided by the embodiment of the application comprises the following steps:

the method comprises the steps that terminal equipment receives a first message, wherein the first message comprises a MAC PDU, and the MAC PDU carries first indication information and/or second indication information;

the first indication information is used for determining whether the MAC PDU contains a first type of MAC sub-PDU or not, and the second indication information is used for determining the number of the first type of MAC sub-PDU contained in the MAC PDU; the first type of MAC subPDU is a MAC subPDU containing an RRC message.

the network equipment sends a first message, wherein the first message comprises a MAC PDU, and the MAC PDU carries first indication information and/or second indication information;

The information indicating device provided by the embodiment of the application comprises:

a receiving unit, configured to receive a first message, where the first message includes a MAC PDU, where the MAC PDU carries first indication information and/or second indication information;

a sending unit, configured to send a first message, where the first message includes a MAC PDU, where the MAC PDU carries first indication information and/or second indication information;

The terminal equipment provided by the embodiment of the application comprises a processor and a memory. The memory is used for storing a computer program, and the processor is used for calling and running the computer program stored in the memory to execute the information indicating method.

The network equipment provided by the embodiment of the application comprises a processor and a memory. The memory is used for storing a computer program, and the processor is used for calling and running the computer program stored in the memory to execute the information indicating method.

The chip provided by the embodiment of the application is used for realizing the information indication method.

Specifically, the chip includes: and a processor for calling and running the computer program from the memory, so that the device mounted with the chip executes the information indicating method.

The computer readable storage medium provided by the embodiment of the application is used for storing a computer program, and the computer program enables a computer to execute the information indication method.

The computer program product provided by the embodiment of the application comprises computer program instructions, wherein the computer program instructions enable a computer to execute the information indication method.

The computer program provided by the embodiment of the application, when running on a computer, causes the computer to execute the information indication method.

By the technical scheme, the terminal equipment can determine whether the first-type MAC sub-PDU (namely, the MAC sub-PDU containing the RRC message) is contained in the MAC PDU or not through the first indication information carried in the MAC PDU, and can determine the number of the first-type MAC sub-PDU (namely, the MAC sub-PDU containing the RRC message) contained in the MAC PDU through the second indication information carried in the MAC PDU, so that the terminal equipment is ensured to correctly receive the first message (such as msgB).

Drawings

The accompanying drawings, which are included to provide a further understanding of the application and are incorporated in and constitute a part of this specification, illustrate embodiments of the application and together with the description serve to explain the application and do not constitute a limitation on the application. In the drawings:

fig. 1 is a schematic diagram of a communication system architecture provided by an embodiment of the present application;

fig. 2-1 is a flowchart of a four-step random access procedure provided by an embodiment of the present application;

fig. 2-2 is a block diagram of a MAC PDU according to an embodiment of the present application;

FIGS. 2-3 are block diagrams of E/T/R/R/BI subheader provided by embodiments of the present application;

FIGS. 2-4 are block diagrams of E/T/RAPID subheader provided by embodiments of the present application;

FIGS. 2-5 are block diagrams of MAC RARs provided by embodiments of the present application;

Fig. 2 to 6 are diagrams showing a relationship between a four-step random access procedure and a two-step random access procedure according to an embodiment of the present application;

fig. 3 is a flow chart of an information indication method according to an embodiment of the present application;

FIG. 4-1 is a block diagram of an msgB MAC PDU provided by an embodiment of the present application;

fig. 4-2 is a format diagram of a sub-header 1 according to an embodiment of the present application;

fig. 4-3 are format diagrams of the sub-header 2 according to an embodiment of the present application;

fig. 4-4 are format diagrams of the sub-header 3 according to an embodiment of the present application;

fig. 4-5 are format diagrams of the sub-header 4 according to the embodiment of the present application;

FIG. 5-1 is a format diagram I of an enhanced sub-header 2 according to an embodiment of the present application;

fig. 5-2 is a format diagram one of an enhanced sub-header 3 according to an embodiment of the present application;

fig. 5-3 are format diagrams of an enhanced sub-header 1 provided by an embodiment of the present application;

fig. 5-4 are format diagrams of a new sub-header of a MAC subPDU according to an embodiment of the present application;

FIGS. 5-5 are format diagrams II of an enhanced sub-header 2 according to embodiments of the present application;

FIGS. 5-6 are format diagrams II of an enhanced sub-header 3 according to an embodiment of the present application;

fig. 6 is a schematic diagram of the structural components of an information indicating device according to an embodiment of the present application;

fig. 7 is a schematic diagram II of the structural composition of the information indicating device according to the embodiment of the present application;

Fig. 8 is a schematic structural diagram of a communication device according to an embodiment of the present application;

FIG. 9 is a schematic block diagram of a chip of an embodiment of the application;

fig. 10 is a schematic block diagram of a communication system provided in an embodiment of the present application.

Detailed Description

The following description of the technical solutions according to the embodiments of the present application will be given with reference to the accompanying drawings in the embodiments of the present application, and it is apparent that the described embodiments are some embodiments of the present application, but not all embodiments. All other embodiments, which can be made by those skilled in the art based on the embodiments of the application without making any inventive effort, are intended to be within the scope of the application.

The technical scheme of the embodiment of the application can be applied to various communication systems, such as: long term evolution (Long Term Evolution, LTE) systems, LTE frequency division duplex (Frequency Division Duplex, FDD) systems, LTE time division duplex (Time Division Duplex, TDD), systems, 5G communication systems, future communication systems, or the like.

An exemplary communication system 100 to which embodiments of the present application may be applied is shown in fig. 1. The communication system 100 may include a network device 110, and the network device 110 may be a device that communicates with a terminal 120 (or referred to as a communication terminal, terminal). Network device 110 may provide communication coverage for a particular geographic area and may communicate with terminals located within the coverage area. Alternatively, the network device 110 may be an evolved base station (Evolutional Node B, eNB or eNodeB) in the LTE system, or a radio controller in a cloud radio access network (Cloud Radio Access Network, CRAN), or the network device may be a mobile switching center, a relay station, an access point, a vehicle device, a wearable device, a hub, a switch, a bridge, a router, a network-side device in a 5G network, or a network device in a future communication system, etc.

The communication system 100 further includes at least one terminal 120 located within the coverage area of the network device 110. "terminal" as used herein includes, but is not limited to, connection via wireline, such as via public-switched telephone network (Public Switched Telephone Networks, PSTN), digital subscriber line (Digital Subscriber Line, DSL), digital cable, direct cable connection; and/or another data connection/network; and/or via a wireless interface, e.g., for a cellular network, a wireless local area network (Wireless Local Area Network, WLAN), a digital television network such as a DVB-H network, a satellite network, an AM-FM broadcast transmitter; and/or means of the other terminal arranged to receive/transmit communication signals; and/or internet of things (Internet of Things, ioT) devices. Terminals arranged to communicate over a wireless interface may be referred to as "wireless communication terminals", "wireless terminals" or "mobile terminals". Examples of mobile terminals include, but are not limited to, satellites or cellular telephones; a personal communications system (Personal Communications System, PCS) terminal that may combine a cellular radiotelephone with data processing, facsimile and data communications capabilities; a PDA that can include a radiotelephone, pager, internet/intranet access, web browser, organizer, calendar, and/or a global positioning system (Global Positioning System, GPS) receiver; and conventional laptop and/or palmtop receivers or other electronic devices that include a radiotelephone transceiver. A terminal may refer to an access terminal, user Equipment (UE), subscriber unit, subscriber station, mobile station, remote terminal, mobile device, user terminal, wireless communication device, user agent, or User Equipment. An access terminal may be a cellular telephone, a cordless telephone, a session initiation protocol (Session Initiation Protocol, SIP) phone, a wireless local loop (Wireless Local Loop, WLL) station, a personal digital assistant (Personal Digital Assistant, PDA), a handheld device with wireless communication capabilities, a computing device or other processing device connected to a wireless modem, an in-vehicle device, a wearable device, a terminal in a 5G network or a terminal in a future evolved PLMN, etc.

Alternatively, direct to Device (D2D) communication may be performed between the terminals 120.

Alternatively, the 5G communication system or 5G network may also be referred to as a New Radio (NR) system or NR network.

Fig. 1 illustrates one network device and two terminals, alternatively, the communication system 100 may include multiple network devices and each network device may include other numbers of terminals within its coverage area, which is not limited by the embodiment of the present application.

Optionally, the communication system 100 may further include a network controller, a mobility management entity, and other network entities, which are not limited by the embodiment of the present application.

It should be understood that a device having a communication function in a network/system according to an embodiment of the present application may be referred to as a communication device. Taking the communication system 100 shown in fig. 1 as an example, the communication device may include a network device 110 and a terminal 120 with communication functions, where the network device 110 and the terminal 120 may be specific devices described above, and are not described herein again; the communication device may also include other devices in the communication system 100, such as a network controller, a mobility management entity, and other network entities, which are not limited in this embodiment of the present application.

It should be understood that the terms "system" and "network" are used interchangeably herein. The term "and/or" is herein merely an association relationship describing an associated object, meaning that there may be three relationships, e.g., a and/or B, may represent: a exists alone, A and B exist together, and B exists alone. In addition, the character "/" herein generally indicates that the front and rear associated objects are an "or" relationship.

In order to facilitate understanding of the technical solutions of the embodiments of the present application, the following describes the technical solutions related to the embodiments of the present application.

The random access is an important process for establishing wireless connection between the terminal equipment and the network side, and uplink synchronization can be obtained between the terminal equipment and the base station through the random access, so as to apply for uplink resources. The random access procedure is classified into a contention-based random access procedure and a non-contention-based random access procedure. Wherein, the contention-based random access procedure includes a four-step random access procedure and a two-step random access procedure, and fig. 2-1 shows a flowchart of the four-step random access procedure, and as shown in fig. 2-1, the four-step random access procedure includes the steps of:

step 201: the terminal device sends msg1 to the base station.

Here, the terminal device transmitting msg1 to the base station can be realized specifically by:

-the terminal device determining a relation (configured by higher layers) of synchronization signal blocks (Synchronization Signal Block, SSB) to PRACH resources;

-the terminal device receives a set of SSBs and determines its reference signal received power (Reference Signal Received Power, RSRP) value, selecting the appropriate SSB according to a threshold;

-the terminal device determining physical random access channel (Physical Random Access Channel, PRACH) resources based on the selected SSB and the correspondence of SSB to RACH resources;

-the terminal device transmitting the preamble on PRACH time-frequency domain resources.

Step 202: the terminal device receives msg2 sent by the base station.

Here, the terminal device receiving msg2 transmitted by the base station may be specifically implemented by:

-the terminal device starts a RAR Window (RA-Response Window) at a first physical downlink control channel (Physical Downlink Control Channel, PDCCH) occasion (occision) after the preamble is transmitted and listens to the PDCCH during the Window run, wherein the PDCCH is a PDCCH scrambled with RA-RNTI. The RA-RNTI is related to PRACH time-frequency resources selected by the terminal equipment, and is calculated as follows:

RA-RNTI＝1+s_id+14×t_id+14×80×f_id+14×80×8×ul_carrier_id

wherein s_id is the index of the first OFDM symbol of PRACH resource (0 is less than or equal to s_id < 14);

t_id is the index of the first time slot of PRACH resource in the system frame (0 is less than or equal to t_id < 80);

f_id is an index of PRACH occasion in frequency domain (0.ltoreq.f_id < 8);

ul_carrier_id is an Uplink (UL) carrier for preamble index transmission.

After the terminal equipment successfully monitors the PDCCH scrambled by the RA-RNTI, the PDSCH scheduled by the PDCCH can be obtained, wherein the PDSCH includes a random access response (Random Access Response, RAR) (i.e., msg 2), and the data format of the MAC PDU of msg2 is shown in fig. 2-2, where the MAC PDU includes a plurality of MAC subpdus, which are respectively MAC subPDU1, MAC subPDU2, MAC subPDU3, and the like. Wherein, the MAC sub PDU1 contains a rollback indication (Backoff Indication, BI), and the structure of the MAC sub PDU1 including E/T/R/R/BI sub-header is shown in FIGS. 2-3. The MAC sub PDU2 contains a random access preamble identification (Random Access preamble ID, RAPID), and the MAC sub PDU2 includes an E/T/RAPID sub-header, and the structure of the E/T/RAPID sub-header is shown in FIGS. 2-4. The remaining MAC subPDU (e.g. MAC subPDU 3) contains RAID and RAR, taking MAC subPDU3 as an example, and MAC subPDU3 comprises E/T/RAPID subheader and MAC RAR, wherein the structure of E/T/RAPID subheader is shown in figures 2-4, and the structure of MAC RAR is shown in figures 2-5. The description of the individual information in fig. 2-3 to 2-5 is as follows:

BI: and the back-off indication information is used for indicating the back-off time for retransmitting the first-step message.

RAPID: the network responds to the received preamble index.

R: representing a reserved bit region.

TAC: a time advance command (Timing Advance Command) for adjusting the upstream timing.

UL Grant: an Uplink Grant (Uplink Grant) is used to indicate the Uplink transmission Msg3 resource.

TC-RNTI: a Temporary cell RNTI (Temporary C-RNTI) for the terminal to subsequently scramble the transmitted Msg3 message.

Step 203: the terminal device sends msg3 to the base station.

msg3 is mainly used to send UE IDs to the network to resolve contention conflicts. For example, if it is an initial access random procedure, an RRC layer message, i.e., CCCH SDU, is carried in msg3, which contains a UE ID and a connection establishment request (rrcsetup request); in case of RRC reestablishment, a reestablishment request (RRCRestablishmentRequest) is carried.

Step 204: the terminal device receives msg4 sent by the base station.

msg4 has two roles, one for contention conflict resolution; the second is to transmit an RRC configuration message to the terminal. Here, if the terminal device receives DCI format 1_0 of a Cell radio network temporary identity (Cell-Radio Network Temporary Identifier, C-RNTI) scrambling code and its corresponding PDSCH, the random access is completed; if the terminal receives DCI format 1_0 of the TC-RNTI scrambling code and the corresponding PDSCH, the content is successfully compared, and the random access is completed.

The two-step random access procedure is in standardization of the discussion procedure and is in the research phase. The two-step random access procedure can improve the time delay and reduce the signaling overhead, and currently, there is a basic mode that msgA transmits msg1 and msg3 of the four-step random access procedure, and msgB transmits msg2 and msg4 of the four-step random access procedure, as shown in fig. 2-6.

The msgB may include a successful random access response (successRAR), a fallback random access response (fallback rar), and a fallback indication (Backoff Indication, BI), among others. Further, RRC messages of a plurality of terminal devices cannot be multiplexed in msgB; the success rar cannot be broken down into multiple messages, that is, the success rar must be contained as a whole in one msgB. Furthermore, the SuccessRAR and the fallbackRAR can be multiplexed in one msgB.

Various types of information contained in the msgB are described below.

For success rar, a UE contention resolution identity containing 12 bits of TAC, 16 bits of C-RNTI and 48 bits is required. Further, the information field of the UE contention resolution identity should be located in the payload (payload) of successRAR MAC subPDU, where successRAR MAC subPDU refers to the MAC subPDU containing the success rar. Furthermore, the information field of the UE contention resolution identity precedes the payload of the MAC subPDU.

Still further, the RRC message contained in msgB needs to meet the following requirements:

1) Whether an RRC message in the msgB needs clear indication or not; and RRC message needs to follow success rar;

2) For RRC messages triggered by the reestablishment cause (reestablishment case), msgB may contain multiple RRC messages of one terminal device, but how to indicate that multiple RRC messages of one terminal device are carried in msgB needs to be solved.

Based on the above requirements, the following technical solutions of the embodiments of the present application are provided, and the technical solutions of the embodiments of the present application aim to solve the problem how to indicate whether an RRC message exists in msgB and how to indicate that a plurality of RRC messages exist in msgB.

Fig. 3 is a flow chart of an information indication method according to an embodiment of the present application, as shown in fig. 3, where the information indication method includes the following steps:

step 301: the method comprises the steps that terminal equipment receives a first message, wherein the first message comprises a MAC PDU, and the MAC PDU carries first indication information and/or second indication information; the first indication information is used for determining whether the MAC PDU contains a first type of MAC sub-PDU or not, and the second indication information is used for determining the number of the first type of MAC sub-PDU contained in the MAC PDU; the first type of MAC subPDU is a MAC subPDU containing an RRC message.

In the embodiment of the application, the network equipment sends the first message, and the terminal equipment receives the first message. Alternatively, the network device may be a base station, such as a gNB.

In the embodiment of the application, the first message is msgB in a two-step random access process. Wherein the first message comprises a MAC PDU, which may alternatively be referred to as an msgB MAC PDU.

In an alternative embodiment, the MAC PDU includes at least one of:

the second-class MAC subPDU only comprises a second subheader, wherein the second subheader comprises BI information;

a third type of MAC subPDU, the third type of MAC subPDU comprising a third subheader and a successful success burst;

a first type of MAC subPDU comprising a first subheader and an SDU, the SDU comprising an RRC message;

a fourth type of MAC subPDU, the fourth type of MAC subPDU including a fourth subheader and a fallback rar;

a fifth type of MAC subPDU that contains a fifth sub-header and padding (padding), or only a fifth sub-header (e.g., when the number of bits of padding is 0).

In the above scheme, the second type of MAC subPDU refers to a MAC subPDU containing BI information, and optionally, the second type of MAC subPDU may be referred to as a BI MAC subPDU.

In the foregoing scenario, the third type of MAC subPDU refers to a MAC subPDU including a success rar, and optionally, the third type of MAC subPDU may be referred to as successRAR MAC subPDU.

In the above solution, the first type of MAC subPDU refers to a MAC subPDU including an RRC message, and optionally, the first type of MAC subPDU may be referred to as an RRC MAC subPDU.

In the foregoing scenario, the fourth type of MAC subPDU refers to a MAC subPDU including a fallback rar, and optionally, the fourth type of MAC subPDU may be referred to as fallbackRAR MAC subPDU.

In the above solution, the fifth type of MAC subPDU refers to a MAC subPDU including padding, and optionally, the fifth type of MAC subPDU may be referred to as padding MAC subPDU. When padding is 0, this MAC subPDU may not contain padding, that is, only the MAC subheader.

In an alternative embodiment, in case the MAC PDU comprises a plurality of MAC sub-PDUs of the first type, the plurality of MAC sub-PDUs of the first type comprise different RRC messages of the same terminal device.

For example: one RRC MAC sub-pdu contains one RRC message, and a plurality of RRC MAC sub-pdus contain a plurality of RRC messages, where the plurality of RRC messages are messages of the same terminal device. This scenario is mainly used when the 2-step CBRA is in RRC reestablishment scenario (RRC re-detach), the network may respond to the same terminal device in msgB with an RRC reestablishment message (RRC re-establishment message) or an RRC reconfiguration message (RRC reconfiguiration message).

In an alternative embodiment, in the MAC PDU, the first type of MAC subPDU is located after the third type of MAC subPDU, where the first type of MAC subPDU and the third type of MAC subPDU are both responsive to the same terminal device. .

For example: in the msgB MAC PDU, if the RRC MAC sub PDU is included, the RRC MAC sub PDU needs to be located after successRAR MAC subPDU of the same terminal device.

The structure of the msgB MAC PDU is described below in conjunction with fig. 4-1, and it should be noted that the structure of the msgB MAC PDU shown in fig. 4-1 is only an alternative example.

As shown in fig. 4-1, one msgB MAC PDU may include one or more MAC subpdus, which may be several kinds of:

1) BI MAC subPDU: the BI MAC sub-PDU contains a MAC sub-header (MAC sub-header) that contains at least BI information, a reference such as sub-header 1 in FIG. 4-1. Further alternatively, the format of the sub-header 1 is as shown in fig. 4-2.

2) successRAR MAC subPDU: successRAR MAC subPDU includes a MAC subheader (see subheader 2 in fig. 4-1) and a success rar. Further, the MAC subheader does not include a 48-bit UE contention resolution flag. Further alternatively, the format of the sub-header 2 is shown in fig. 4-3.

3) RRC MAC subPDU: the RRC MAC subPDU includes a MAC subheader (refer to subheader 3 in fig. 4-1) and a service data unit (Service Data Unit, SDU) including an RRC message. Further alternatively, the sub-header 3 may have two types according to the length of the L field therein, and the format of the sub-header 3 is as shown in fig. 4 to 4.

4) fallbackRAR MAC subPDU: fallbackRAR MAC subPDU includes a MAC subheader (see subheader 4 in fig. 4-1) and a fallback rar. Further alternatively, the format of the sub-header 4 is as shown in fig. 4-5.

The msgB MAC PDU may include one or more RRC MAC subpdus of the same UE, where the RRC message in the RRC MAC subpdus belongs to one terminal device. Furthermore, the RRC MAC subpdus need to follow successRAR MAC subPDU, successRAR MAC subPDU and these RRC MAC subpdus belong to one terminal device.

It should be noted that, the sub-head 1 shown in fig. 4-1 corresponds to the second sub-head in the embodiment of the present application, the sub-head 2 corresponds to the third sub-head in the embodiment of the present application, the sub-head 3 corresponds to the fourth sub-head in the embodiment of the present application, and the sub-head 4 corresponds to the fourth sub-head in the embodiment of the present application.

The terminal device does not know whether the MAC PDU contains RRC messages or not, nor whether the MAC PDU contains several RRC messages, when decoding the MAC PDU. For this reason, according to the technical solution of the embodiment of the present application, the location and/or the number of RRC messages in the MAC PDU are specified by carrying the first indication information and/or the second indication information in the MAC PDU. The implementation of the first indication information and/or the second indication information is described in detail below.

Mode one

The third sub-header carries the first indication information, and the first indication information is used for indicating whether a third type of MAC subPDU where the third sub-header is located follows the first type of MAC subPDU; and the first sub-header carries the first indication information, where the first indication information is used to indicate whether a first type of MAC subPDU where the first sub-header is located is followed by the first type of MAC subPDU.

For example: referring to fig. 4-1, the format of the sub-header 2 is enhanced, and the sub-header 2 at least includes first indication information, where the first indication information is used to indicate whether the successRAR MAC subPDU where the sub-header 2 is located follows an RRC MAC sub-pdu (or follows an RRC message). In addition, the format of the enhancer header 3, the sub-header 3 at least includes first indication information, where the first indication information is used to indicate whether the RRC MAC sub-pdu where the sub-header 3 is located follows the RRC MAC sub-pdu (or whether the RRC message follows).

In particular implementations, the first sub-header may reuse the MAC subheader format of R-15, and thus may be enhanced.

The format of enhanced subheader 2 and subheader 3 is described below in connection with specific examples.

(1) The format of the enhanced sub-header 2 (i.e., the sub-header of successRAR MAC subPDU, i.e., the third sub-header) is shown in fig. 5-1, wherein,

T: the representation type indicates different types of MAC subpdus;

e: an enhanced indication field indicates whether the MAC subPDU is followed by RRC message MAC subPDU.

Here, E represents the first indication information, and it should be noted that the name of "E" is only an exemplary description.

In one example, e=0 (or 1) indicates that the MAC sub-pdu is followed by RRC message MAC subPDU, and e=1 (or 0) indicates that the MAC sub-pdu is not followed by RRC message MAC subPDU.

The enhanced indication field in the third subheader is described in the following by other description means:

(2) The format of the enhanced sub-header 3, i.e. the sub-header of the RRC MAC sub-pdu, i.e. the first sub-header, is shown in fig. 5-2, wherein,

f: indicating whether the length information carried by the sub-header is 8 bits or 16 bits;

l: the length information may be 8 bits (as shown in (a)) or 16 bits (as shown in (b));

In one example, e=0 (or 1) indicates that the MAC subPDU following the MAC subPDU is still RRC message MAC subPDU, and e=1 (or 0) indicates that the MAC subPDU following the MAC subPDU is not RRC message MAC subPDU.

The enhanced indication field in the first subheader is described in the following by other description means:

mode two

The second-type MAC sub-PDU carries the second indication information, and the second indication information is used for indicating the number of the first-type MAC sub-PDUs contained in the MAC PDU; and the third sub-header carries the first indication information, where the first indication information is used to indicate whether a third type of MAC subPDU where the third sub-header is located is followed by the first type of MAC subPDU.

For example: referring to fig. 4-1, the format of the enhancer header 1, the sub-header 1 contains at least second indication information for indicating the number of RRC MAC sub-PDUs contained in the msgB MAC PDU. The terminal device is able to know, based on the sub-header 1, that several RRC messages are included in the msgB MAC PDU, but not yet which MAC sub-PDU is followed by these RRC messages, and for this purpose, the format of the sub-header 2 is enhanced, and the sub-header 2 contains at least first indication information, which is used to indicate whether the successRAR MAC subPDU where the sub-header 2 is located follows the RRC MAC sub-PDU (or whether it follows the RRC message).

The format of enhanced sub-header 1 and sub-header 2 is described below in connection with specific examples.

(1) The format of enhanced subheader 1 (i.e., the subheader of the BI MAC subPDU, i.e., the second subheader) is shown in fig. 5-3, wherein,

t: the representation type indicates different types of MAC subpdus;

n: the number of RRC MAC sub-PDUs included in the msgB MAC PDU is indicated.

(2) The format of the enhanced sub-header 2 (i.e., the sub-header of successRAR MAC subPDU, i.e., the third sub-header) is shown in fig. 5-1, wherein,

t: the representation type indicates different types of MAC subpdus;

Mode three

The MAC PDU further includes a sixth type of MAC subPDU, where the sixth type of MAC subPDU includes only a sixth subheader, and the sixth subheader is located after the third type of MAC subPDU; the third sub-header carries the first indication information, and the first indication information is used for indicating whether a third type of MAC subPDU where the third sub-header is located follows the first type of MAC subPDU; and, the sixth sub-header carries the second indication information, where the second indication information is used to indicate the number of the first type MAC subpdus contained in the MAC PDU.

For example: referring to fig. 4-1, the format of the sub-header 2 is enhanced, and the sub-header 2 at least includes first indication information, where the first indication information is used to indicate whether the successRAR MAC subPDU where the sub-header 2 is located follows an RRC MAC sub-pdu (or follows an RRC message). In this way, the terminal device is able to know from which successRAR MAC subPDU it follows RRC message MAC subPDU, but the terminal device does not know how many RRC message MAC subPDU there are, for which reason a new MAC sub-pdu (i.e. said sixth type of MAC sub-pdu) is introduced, which contains a MAC sub-header, which follows successRAR MAC subPDU, and which successRAR MAC subPDU indicates that RRC message MAC subPDU follows; the new MAC sub pdu carries the second indication information, through which it can indicate how many pieces RRC message MAC subPDU are.

The format of the enhanced subheader 2 and the format of the new MAC subPDU are described below in connection with specific examples.

t: the representation type indicates different types of MAC subpdus;

(2) The new MAC subPDU (i.e., the sixth type of MAC subPDU) contains only one sub-header (i.e., the sixth sub-header), the format of which is shown in fig. 5-4, wherein,

n: the number of RRC MAC sub-PDUs included in the msgB MAC PDU is indicated.

Mode four

The third sub-header carries the second indication information, where the second indication information is used to indicate the number of the first-type MAC subpdus contained in the MAC PDU.

For example: referring to fig. 4-1, the format of the sub-header 2 is enhanced, and the sub-header 2 contains at least second indication information for indicating the number of RRC MAC sub-PDUs contained in the msgB MAC PDU. It should be noted that, by carrying the second indication information in the sub-header 2, it is implicitly indicated whether the sub-header 2 is located successRAR MAC subPDU followed by the RRC MAC sub-pdu (or whether it is followed by the RRC message), and at the same time, the number of RRC MAC sub-pdus is also indicated.

The format of the enhanced sub-header 2 (i.e., the sub-header of successRAR MAC subPDU, i.e., the third sub-header) is shown in fig. 5-5, wherein,

t: the representation type indicates different types of MAC subpdus;

n: the number of RRC MAC sub-PDUs included in the msgB MAC PDU is indicated.

It should be noted that the number of bits occupied by the newly added indication field (e.g. E, N) in the embodiment of the present application is merely exemplary. For example, N in fig. 5-3, fig. 5-4, and fig. 5-5 occupies 2 bits, the number of bits occupied by N is not limited to 2 bits, but may be other numbers of bits, and optionally, the number of bits occupied by N may be determined according to the number of RRC MAC subpdus included in the msgB MAC PDU.

Mode five

The success RAR carries the first indication information and/or the second indication information, wherein the first indication information is used for indicating whether a third type of MAC (media access control) subPDU where the success RAR is located follows the first type of MAC subPDU; the second indication information is used for indicating the number of the first-type MAC subPDUs contained in the MAC PDU.

Here, the first indication information and/or the second indication information may be carried in a payload of the success rar. In particular, the second indication information may be carried only in the payload of the success rar, which implicitly indicates whether the success rar follows the RRC MAC sub pdu (or whether the RRC message follows the success rar) after successRAR MAC subPDU where the success rar is located, and at the same time, indicates the number of RRC MAC sub pdus.

Mode six

The first sub-header carries the first indication information, where the first indication information is used to indicate that a first type of MAC subPDU where the first sub-header is located is a MAC subPDU including an RRC message. Further, the first indication information is type indication information, and the type indication information is used for indicating that the type of the first type of MAC subPDU where the first subheader is located is a MAC subPDU including an RRC message.

For example: referring to fig. 4-1, the format of the enhancer header 3 (i.e., the first sub-header) includes at least first indication information, where the first indication information is used to indicate whether the MAC sub-pdu where the sub-header 3 is located is a MAC sub-pdu including an RRC message.

The format of the enhanced sub-header 3 is described below in connection with a specific example.

The format of the enhanced sub-header 3, i.e. the sub-header of the RRC MAC sub-pdu, i.e. the first sub-header, is shown in fig. 5-6, wherein,

t: the representation type indicates different types of MAC subpdus.

Here, a byte (byte) is added before the R/F/LCID, and the byte includes at least one type field (i.e., T) that can indicate that the MAC subPDU is an RRC MAC subPDU.

It should be noted that, the number of bits occupied by the newly added indication field T in the embodiment of the present application is merely exemplary. Such as T occupies 2 bits (4 types can be indicated) in fig. 5-6, the number of bits occupied by T is not limited to 2 bits, but may be other numbers of bits, and optionally, the number of bits occupied by T may be determined according to the type of MAC subPDU that needs to be indicated.

Fig. 6 is a schematic structural diagram of an information indicating apparatus according to an embodiment of the present application, which is applied to a terminal device, as shown in fig. 6, and the information indicating apparatus includes:

a receiving unit 601, configured to receive a first message, where the first message includes a MAC PDU, and the MAC PDU carries first indication information and/or second indication information;

In an alternative embodiment, the MAC PDU includes at least one of:

a third type of MAC subPDU, the third type of MAC subPDU comprising a third subheader and a success rar;

a fifth type of MAC subPDU that contains a fifth sub-header and padding, or contains only the fifth sub-header.

In an optional embodiment, the third sub-header carries the first indication information, where the first indication information is used to indicate whether a third type of MAC subPDU where the third sub-header is located is followed by the first type of MAC subPDU; and, in addition, the method comprises the steps of,

the first sub-header carries the first indication information, where the first indication information is used to indicate whether a first type of MAC subPDU where the first sub-header is located is followed by the first type of MAC subPDU.

In an optional embodiment, the second type MAC subPDU carries the second indication information, where the second indication information is used to indicate the number of the first type MAC subpdus contained in the MAC PDU; and, in addition, the method comprises the steps of,

And the third sub-header carries the first indication information, and the first indication information is used for indicating whether a third type of MAC subPDU where the third sub-header is located is followed by the first type of MAC subPDU.

In an alternative embodiment, the MAC PDU further includes a sixth type of MAC subPDU, where the sixth type of MAC subPDU includes only a sixth subheader, and the sixth subheader is located after the third type of MAC subPDU;

the third sub-header carries the first indication information, and the first indication information is used for indicating whether a third type of MAC subPDU where the third sub-header is located follows the first type of MAC subPDU; and, in addition, the method comprises the steps of,

the sixth sub-header carries the second indication information, where the second indication information is used to indicate the number of the first type MAC subpdus contained in the MAC PDU.

In an optional embodiment, the third sub-header carries the second indication information, where the second indication information is used to indicate the number of MAC subpdus of the first type included in the MAC PDU.

In an alternative embodiment, the success rar carries the first indication information and/or the second indication information,

the first indication information is used for indicating whether a third type of MAC subPDU where the success RAR is located follows the first type of MAC subPDU;

The second indication information is used for indicating the number of the first-type MAC subPDUs contained in the MAC PDU.

In an optional embodiment, the first sub-header carries the first indication information, where the first indication information is used to indicate that a first type of MAC subPDU where the first sub-header is located is a MAC subPDU including an RRC message.

In an optional embodiment, the first indication information is type indication information, where the type indication information is used to indicate that a type of the first type MAC subPDU where the first sub-header is located is a MAC subPDU including an RRC message.

In an alternative embodiment, in the MAC PDU, the first type of MAC sub-PDU is located after the third type of MAC sub-PDU.

In an alternative embodiment, the first message is msgB in a two-step random access procedure.

It should be understood by those skilled in the art that the above description of the information indicating apparatus according to the embodiment of the present application may be understood with reference to the description of the information indicating method according to the embodiment of the present application.

Fig. 7 is a schematic diagram ii of the structural composition of an information indicating apparatus according to an embodiment of the present application, which is applied to a network device, as shown in fig. 7, where the information indicating apparatus includes:

a sending unit 701, configured to send a first message, where the first message includes a MAC PDU, and the MAC PDU carries first indication information and/or second indication information;

In an alternative embodiment, the MAC PDU includes at least one of:

Fig. 8 is a schematic block diagram of a communication device 800 according to an embodiment of the present application. The communication device may be a terminal device or a network device, and the communication device 800 shown in fig. 8 includes a processor 810, where the processor 810 may call and execute a computer program from a memory to implement the method according to the embodiment of the present application.

Optionally, as shown in fig. 8, the communication device 800 may also include a memory 820. Wherein the processor 810 may call and run a computer program from the memory 820 to implement the method in embodiments of the present application.

Wherein the memory 820 may be a separate device from the processor 810 or may be integrated into the processor 810.

Optionally, as shown in fig. 8, the communication device 800 may further include a transceiver 830, and the processor 810 may control the transceiver 830 to communicate with other devices, and in particular, may send information or data to other devices, or receive information or data sent by other devices.

Among other things, transceiver 830 may include a transmitter and a receiver. Transceiver 830 may further include antennas, the number of which may be one or more.

Optionally, the communication device 800 may be specifically a network device in the embodiment of the present application, and the communication device 800 may implement a corresponding flow implemented by the network device in each method in the embodiment of the present application, which is not described herein for brevity.

Optionally, the communication device 800 may be specifically a mobile terminal/terminal device according to the embodiment of the present application, and the communication device 800 may implement a corresponding flow implemented by the mobile terminal/terminal device in each method according to the embodiment of the present application, which is not described herein for brevity.

Fig. 9 is a schematic structural view of a chip of an embodiment of the present application. The chip 900 shown in fig. 9 includes a processor 910, and the processor 910 may call and execute a computer program from a memory to implement the method in an embodiment of the present application.

Optionally, as shown in fig. 9, the chip 900 may further include a memory 920. Wherein the processor 910 may invoke and run a computer program from the memory 920 to implement the method in the embodiments of the present application.

Wherein the memory 920 may be a separate device from the processor 910 or may be integrated in the processor 910.

Optionally, the chip 900 may also include an input interface 930. The processor 910 may control the input interface 930 to communicate with other devices or chips, and in particular, may acquire information or data sent by the other devices or chips.

Optionally, the chip 900 may also include an output interface 940. Wherein the processor 910 may control the output interface 940 to communicate with other devices or chips, and in particular, may output information or data to the other devices or chips.

Optionally, the chip may be applied to the network device in the embodiment of the present application, and the chip may implement a corresponding flow implemented by the network device in each method in the embodiment of the present application, which is not described herein for brevity.

Optionally, the chip may be applied to a mobile terminal/terminal device in the embodiment of the present application, and the chip may implement a corresponding flow implemented by the mobile terminal/terminal device in each method in the embodiment of the present application, which is not described herein for brevity.

It should be understood that the chips referred to in the embodiments of the present application may also be referred to as system-on-chip chips, or the like.

Fig. 10 is a schematic block diagram of a communication system 1000 provided by an embodiment of the present application. As shown in fig. 10, the communication system 1000 includes a terminal device 1010 and a network device 1020.

The terminal device 1010 may be used to implement the corresponding functions implemented by the terminal device in the above method, and the network device 1020 may be used to implement the corresponding functions implemented by the network device in the above method, which are not described herein for brevity.

It should be appreciated that the processor of an embodiment of the present application may be an integrated circuit chip having signal processing capabilities. In implementation, the steps of the above method embodiments may be implemented by integrated logic circuits of hardware in a processor or instructions in software form. The processor may be a general purpose processor, a digital signal processor (Digital Signal Processor, DSP), an application specific integrated circuit (Application Specific Integrated Circuit, ASIC), an off-the-shelf programmable gate array (Field Programmable Gate Array, FPGA) or other programmable logic device, discrete gate or transistor logic device, discrete hardware components. The disclosed methods, steps, and logic blocks in the embodiments of the present application may be implemented or performed. A general purpose processor may be a microprocessor or the processor may be any conventional processor or the like. The steps of the method disclosed in connection with the embodiments of the present application may be embodied directly in the execution of a hardware decoding processor, or in the execution of a combination of hardware and software modules in a decoding processor. The software modules may be located in a random access memory, flash memory, read only memory, programmable read only memory, or electrically erasable programmable memory, registers, etc. as well known in the art. The storage medium is located in a memory, and the processor reads the information in the memory and, in combination with its hardware, performs the steps of the above method.

It will be appreciated that the memory in embodiments of the application may be volatile memory or nonvolatile memory, or may include both volatile and nonvolatile memory. The nonvolatile Memory may be a Read-Only Memory (ROM), a Programmable ROM (PROM), an Erasable Programmable ROM (EPROM), an electrically Erasable Programmable ROM (ElectricallyEPROM, EEPROM), or a flash Memory, among others. The volatile memory may be random access memory (Random Access Memory, RAM) which acts as an external cache. By way of example, and not limitation, many forms of RAM are available, such as Static RAM (SRAM), dynamic RAM (DRAM), synchronous DRAM (SDRAM), double Data Rate SDRAM (Double Data Rate SDRAM), enhanced SDRAM (ESDRAM), synchronous DRAM (SLDRAM), and Direct RAM (DR RAM). It should be noted that the memory of the systems and methods described herein is intended to comprise, without being limited to, these and any other suitable types of memory.

It should be understood that the above memory is illustrative but not restrictive, and for example, the memory in the embodiments of the present application may be Static RAM (SRAM), dynamic RAM (DRAM), synchronous DRAM (SDRAM), double data rate SDRAM (DDR SDRAM), enhanced SDRAM (ESDRAM), synchronous Link DRAM (SLDRAM), direct RAM (DR RAM), and the like. That is, the memory in embodiments of the present application is intended to comprise, without being limited to, these and any other suitable types of memory.

The embodiment of the application also provides a computer readable storage medium for storing a computer program.

Optionally, the computer readable storage medium may be applied to a network device in the embodiment of the present application, and the computer program causes a computer to execute a corresponding flow implemented by the network device in each method in the embodiment of the present application, which is not described herein for brevity.

Optionally, the computer readable storage medium may be applied to a mobile terminal/terminal device in the embodiment of the present application, and the computer program causes a computer to execute a corresponding procedure implemented by the mobile terminal/terminal device in each method of the embodiment of the present application, which is not described herein for brevity.

The embodiment of the application also provides a computer program product comprising computer program instructions.

Optionally, the computer program product may be applied to a network device in the embodiment of the present application, and the computer program instructions cause a computer to execute corresponding processes implemented by the network device in each method in the embodiment of the present application, which are not described herein for brevity.

Optionally, the computer program product may be applied to a mobile terminal/terminal device in the embodiment of the present application, and the computer program instructions cause a computer to execute corresponding processes implemented by the mobile terminal/terminal device in each method of the embodiment of the present application, which are not described herein for brevity.

The embodiment of the application also provides a computer program.

Optionally, the computer program may be applied to a network device in the embodiment of the present application, and when the computer program runs on a computer, the computer is caused to execute a corresponding flow implemented by the network device in each method in the embodiment of the present application, which is not described herein for brevity.

Optionally, the computer program may be applied to a mobile terminal/terminal device in the embodiment of the present application, and when the computer program runs on a computer, the computer is caused to execute corresponding processes implemented by the mobile terminal/terminal device in each method in the embodiment of the present application, which is not described herein for brevity.

Those of ordinary skill in the art will appreciate that the various illustrative elements and algorithm steps described in connection with the embodiments disclosed herein may be implemented as electronic hardware, or combinations of computer software and electronic hardware. Whether such functionality is implemented as hardware or software depends upon the particular application and design constraints imposed on the solution. Skilled artisans may implement the described functionality in varying ways for each particular application, but such implementation decisions should not be interpreted as causing a departure from the scope of the present application.

It will be clear to those skilled in the art that, for convenience and brevity of description, specific working procedures of the above-described systems, apparatuses and units may refer to corresponding procedures in the foregoing method embodiments, and are not repeated herein.

In the several embodiments provided by the present application, it should be understood that the disclosed systems, devices, and methods may be implemented in other manners. For example, the apparatus embodiments described above are merely illustrative, e.g., the division of the units is merely a logical function division, and there may be additional divisions when actually implemented, e.g., multiple units or components may be combined or integrated into another system, or some features may be omitted or not performed. Alternatively, the coupling or direct coupling or communication connection shown or discussed with each other may be an indirect coupling or communication connection via some interfaces, devices or units, which may be in electrical, mechanical or other form.

The units described as separate units may or may not be physically separate, and units shown as units may or may not be physical units, may be located in one place, or may be distributed on a plurality of network units. Some or all of the units may be selected according to actual needs to achieve the purpose of the solution of this embodiment.

In addition, each functional unit in the embodiments 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 functions, if implemented in the form of software functional units and sold or used as a stand-alone product, may be stored in a computer-readable storage medium. Based on this understanding, the technical solution of the present application may be embodied essentially or in a part contributing to the prior art or in a part of the technical solution, in the form of a software product stored in a storage medium, comprising several instructions for causing a computer device (which may be a personal computer, a server, a network device, etc.) to perform all or part of the steps of the method according to the embodiments of the present application. And the aforementioned storage medium includes: a usb 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.

The foregoing is merely illustrative of the present application, and the present application is not limited thereto, and any person skilled in the art will readily recognize that variations or substitutions are within the scope of the present application. Therefore, the protection scope of the present application shall be subject to the protection scope of the claims.

Claims

1. An information indication method, the method comprising:

the method comprises the steps that terminal equipment receives a first message, wherein the first message comprises a media access control protocol data unit (MAC PDU), and the MAC PDU carries first indication information and second indication information;

the first indication information is used for determining whether the MAC PDU contains a first type of MAC sub-PDU or not, and the second indication information is used for determining the number of the first type of MAC sub-PDU contained in the MAC PDU; the first type of MAC subPDU is an MAC subPDU containing RRC message; wherein, the MAC PDU includes: a third type of MAC subPDU comprising a third subheader and a successful random access response, successRAR;

2. The method of claim 1, wherein the MAC PDU further comprises at least one of:

a fourth type of MAC subPDU, where the fourth type of MAC subPDU includes a fourth subheader and a fallback random access response fallbackRAR;

3. The method of claim 2, wherein,

4. The method of claim 2, wherein,

the second-type MAC sub-PDU carries the second indication information, and the second indication information is used for indicating the number of the first-type MAC sub-PDUs contained in the MAC PDU.

5. The method of claim 2, wherein the MAC PDU further comprises a sixth type of MAC subPDU, the sixth type of MAC subPDU comprising only a sixth subheader, the sixth subheader located after the third type of MAC subPDU;

6. The method of claim 2, wherein the third sub-header carries the second indication information, the second indication information being used to indicate a number of MAC subpdus of the first type contained in the MAC PDU.

7. The method of claim 2, wherein the success rar carries the first indication information and/or the second indication information,

8. The method of claim 2, wherein the first sub-header carries the first indication information, and the first indication information is used to indicate that a first type of MAC subPDU where the first sub-header is located is a MAC subPDU including an RRC message.

9. The method of claim 8, wherein the first indication information is type indication information, and the type indication information is used to indicate that a type of the first type of MAC subPDU in which the first subheader is located is a MAC subPDU including an RRC message.

10. The method according to any of claims 2 to 9, wherein the first type of MAC sub-PDU is located after the third type of MAC sub-PDU in the MAC PDUs.

11. The method according to any of claims 1 to 10, wherein for the case that the MAC PDU comprises a plurality of first type MAC sub-PDUs, the plurality of first type MAC sub-PDUs comprise different RRC messages of the same terminal device.

12. A method according to any of claims 1 to 11, wherein the first message is msgB in a two-step random access procedure.

13. An information indication method, the method comprising:

the network equipment sends a first message, wherein the first message comprises a MAC PDU, and the MAC PDU carries first indication information and second indication information;

14. The method of claim 13, wherein the MAC PDU comprises at least one of:

15. The method of claim 14, wherein,

16. The method of claim 14, wherein,

17. The method of claim 14, wherein the MAC PDU further comprises a sixth type of MAC subPDU, the sixth type of MAC subPDU comprising only a sixth subheader, the sixth subheader located after the third type of MAC subPDU;

18. The method of claim 14, wherein the third sub-header carries the second indication information indicating a number of MAC subpdus of a first type contained in the MAC PDU.

19. The method of claim 14, wherein the success rar carries the first indication information and/or the second indication information,

20. The method of claim 14, wherein the first sub-header carries the first indication information, and the first indication information is used to indicate that a first type of MAC subPDU where the first sub-header is located is a MAC subPDU including an RRC message.

21. The method of claim 20, wherein the first indication information is type indication information, and the type indication information is used to indicate that a type of the first type of MAC subPDU in which the first subheader is located is a MAC subPDU including an RRC message.

22. The method of any of claims 14 to 21, wherein the first type of MAC sub-PDU is located after the third type of MAC sub-PDU in the MAC PDUs.

23. The method according to any of claims 13 to 22, wherein for the case where the MAC PDU comprises a plurality of first type MAC sub-PDUs, the plurality of first type MAC sub-PDUs comprise different RRC messages of the same terminal device.

24. A method according to any of claims 13 to 23, wherein the first message is msgB in a two-step random access procedure.

25. An information indicating apparatus, the apparatus comprising:

a receiving unit, configured to receive a first message, where the first message includes a MAC PDU, where the MAC PDU carries first indication information and second indication information;

26. The apparatus of claim 25, wherein the MAC PDU comprises at least one of:

27. The apparatus of claim 26, wherein,

28. The apparatus of claim 26, wherein,

29. The apparatus of claim 26, wherein the MAC PDU further comprises a sixth type of MAC subPDU, the sixth type of MAC subPDU comprising only a sixth subheader, the sixth subheader located after the third type of MAC subPDU;

30. The apparatus of claim 26, wherein the third sub-header carries the second indication information indicating a number of MAC subpdus of a first type contained in the MAC PDU.

31. The apparatus of claim 26, wherein the success rar carries the first indication information and/or the second indication information,

32. The apparatus of claim 26, wherein the first sub-header carries the first indication information, and the first indication information is used to indicate that a first type of MAC subPDU where the first sub-header is located is a MAC subPDU including an RRC message.

33. The apparatus of claim 32, wherein the first indication information is type indication information, and the type indication information is used to indicate that a type of a first type of MAC subPDU in which the first subheader is located is a MAC subPDU including an RRC message.

34. The apparatus of any of claims 26-33, wherein the first type of MAC sub-PDU is located after the third type of MAC sub-PDU in the MAC PDUs.

35. The apparatus of any of claims 25-34, wherein, for a case where the MAC PDU comprises a plurality of first type MAC sub-PDUs, the plurality of first type MAC sub-PDUs comprise different RRC messages for the same terminal device.

36. An apparatus as claimed in any one of claims 25 to 35, wherein the first message is msgB in a two-step random access procedure.

37. An information indicating apparatus, the apparatus comprising:

a sending unit, configured to send a first message, where the first message includes a MAC PDU, where the MAC PDU carries first indication information and second indication information;

38. The apparatus of claim 37, wherein the MAC PDU comprises at least one of:

39. The apparatus of claim 38, wherein,

40. The apparatus of claim 38, wherein,

41. The apparatus of claim 38, wherein the MAC PDU further comprises a sixth type of MAC subPDU, the sixth type of MAC subPDU comprising only a sixth subheader, the sixth subheader located after the third type of MAC subPDU;

42. The apparatus of claim 38, wherein the third sub-header carries the second indication information indicating a number of MAC subpdus of a first type contained in the MAC PDU.

43. The apparatus of claim 38, wherein the success rar carries the first indication information and/or the second indication information,

44. The apparatus of claim 38, wherein the first sub-header carries the first indication information, and the first indication information is used to indicate that a first type of MAC subPDU where the first sub-header is located is a MAC subPDU including an RRC message.

45. The apparatus of claim 44, wherein the first indication information is type indication information, and the type indication information is used to indicate that a type of a first type of MAC subPDU in which the first subheader is located is a MAC subPDU including an RRC message.

46. The apparatus of any of claims 38-45, wherein the first type of MAC sub-PDU is located after the third type of MAC sub-PDU in the MAC PDUs.

47. The apparatus of any of claims 37-46, wherein, for a case where the MAC PDU comprises a plurality of first type MAC sub-PDUs, the plurality of first type MAC sub-PDUs comprise different RRC messages for a same terminal device.

48. An apparatus as claimed in any one of claims 37 to 47, wherein the first message is msgB in a two-step random access procedure.

49. A terminal device, comprising: a processor and a memory for storing a computer program, the processor being adapted to invoke and run the computer program stored in the memory, to perform the method according to any of claims 1 to 12.

50. A network device, comprising: a processor and a memory for storing a computer program, the processor being for invoking and running the computer program stored in the memory, performing the method of any of claims 13 to 24.

51. A chip, comprising: a processor for calling and running a computer program from a memory, causing a device on which the chip is mounted to perform the method of any one of claims 1 to 12.

52. A chip, comprising: a processor for calling and running a computer program from a memory, causing a device on which the chip is mounted to perform the method of any of claims 13 to 24.

53. A computer readable storage medium storing a computer program for causing a computer to perform the method of any one of claims 1 to 12.

54. A computer readable storage medium storing a computer program for causing a computer to perform the method of any one of claims 13 to 24.